Essay on Social Networking A Modern Day Freak Show

The carnival grotesque, with its freak shows and abnormal humans, was very popular and controversial back in the late 18th to early 19th century, by then it had matured into a distinct form of entertainment. In the 21st century, has the concept become dated? Has the freak show been revealed for the mistreatment and subjugation of many poor human beings? We live in times where many things that were once discriminated are now accepted and many kinds of people recognized as members of society and although there are instances that would challenge that notion, it is only a minority. This represents the progress mankind has made to understand one another. But has the idea of the freak show been abandoned with this new period? It is unfortunate†¦show more content†¦The social media sites allow us to upload and express our identity. Of course there is debate on insults over Facebook post online, but debaters argue social networking is a new field of communicating there is no social conditioning really to establish how to properly act online compare to how different from how we act in real life. It is also with social media that even when we point out the freak show and in some way degrade the person, it leads to a positive matter. (Observers) For example, the article, â€Å"Serious documentary or freak show† depicts a medical professional journey in observing a clan of deformed natives. The clan was being â€Å"sensationalize† by providing programming and donations to them for animals rights regardless it is a cartoon. However because of this, the clan got money and medical treatment for themselves (Koppel 325). That is an example of exploiting the deformities; it actually helped the clan despite a loss in privacy and dignity. That is true, that social networking has allowed us to communicate with more people. We are social creatures; we enjoy the company of others but are sometimes limited because of distance situations, language barriers, and even failure to understand one another. Social networking is a concept that has received an upgrade along with societ y. These upgrades are sites like Facebook, Instagram, YouTube, and etc. They are the new ways we socializeShow MoreRelatedSocial Media And Digital Defense1277 Words   |  6 Pages â€Æ' Social Media Digital Defense Social media; a brief history Computer networking was envisioned in the 60’s as a military-centric command and control scheme. In the 70s and 80s as the amount of computers that were being used increased came the idea that connected computers would make a great forum for discussing topics, meeting new people and renewing acquaintances. During the late 70s to mid-90’s companies and hobbyists were building sites that allowed people to share information using a systemRead MoreImpression Management Of A Networked Setting : Reading Pop Culture, 2nd Ed Edited By Jeff Osbourne1954 Words   |  8 Pagesfade on social media sites. The author states how many young people today are sad, but when on Facebook only take happy looking selfies and hide their true feelings, so they can get more likes from friends. And even how your social media profile page can make a good, or bad impression for a future employer; forcing teens to be more warry about what pictures, videos and reshares that are on their profile pag e. In the book, it goes into the scenario that teenagers will go and find someone’s social networkingRead MoreCompany the Google3287 Words   |  14 PagesIntroduction Social networking sites have become very popular avenues for people to communicate with family, friends and colleagues from around the corner or across the globe. 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Social media can be defined as web sites and other online means of communication that are used by large groups of people to share information and to develop social and professional contacts: Many businesses are utilizing social media to generate sales (Dictionary.com, n.p.). For the sport industry, social media has enabled fans to have a closerRead MoreHigh Education Is A Modern Day Crisis3165 Words   |  13 PagesTuition to attend a university or college in America has gradually been increasing making the pursuit for a degree even more expensive than before. The escalation of the affordability of seeking a higher education is a modern day crisis! A college degree is very important in today’s fields predominantly due to the increase in competition for a job. Degrees are viewed as a requirement for a numerous amount of jobs even though one is not guaranteed work in that field. 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Industrial Psychology in 12 Angry Man Essay - 3477 Words

Industrial-Organizational Psychology in Film Industrial-Organizational (I/O) psychology is the study of human behavior at work and it is concerned with the development of and application of scientific principles to the workplace (Spector, 2008). In this field of I/O psychology there are many topics that outlined how individuals will perform at work and how successful they will be. Some of these topics are as fallows Goal setting, Selection, Employee Motivation, Job satisfaction, Emotions at work, Burnout, and Occupational Stress. In the film, 12 Angry Men (Rose et al., 1957) shows various topics of I/O psychology that are concerned with the 12 jurors in their workplace and their decision-making. In this paper I will explain how the†¦show more content†¦One of the four principles is that goals must be specific and not vague because one can easily get tangled the objective. Second, goals need to be committed and have a sense of ownership to an individual because they are more likely to attain the goal. Third, feedback needs to be given by employer or organization on how an employee is doing. Finally goals need to be difficult because it will result in better performance and the person will work harder to achieve it (Spector, 2008). In 12 Angry Men, we see the goal setting of the different jurors. In the second scene of the movie when all the jurors entered the deliberation room the juror 1, the Foreman was the leader of voting he organized everyone around the table and the goal was to vote on the sentence of guilty and not guilty. Juror 1, main goal was to get the other jurors votes he committed his goal by asking a showing of hands to those who thought the kid was guilty or not guilty. 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Gaining And Maintaining Airworthiness Engineering Essay Free Essays

string(79) " flight proving is commence much early-on in the design and proving procedure\." Aircraft design procedure involved in varied subjects such as aeromechanicss, constructions, flight mechanics etc. Therefore, for an aircraft to go operational it is indispensable to show that the building and design of the aircraft can follow with the demands applicable and such confirmation and proof grounds required to be delegated to the relevant governments. This study introduces ‘Airworthiness ‘ and provides the reader the model involved in deriving airworthiness and how to keep it later. We will write a custom essay sample on Gaining And Maintaining Airworthiness Engineering Essay or any similar topic only for you Order Now Introduction Consideration of airworthiness policies has its beginnings since the early yearss of military flight. But aircraft design informations has been recorded prior to 1910 for balloons and the Royal Aircraft Factory has produced a design demand papers in 1916. The Aerial Navigation Act that is countenance by the Home Office in 1911 to censor winging in populated countries is an early illustration of safety ordinance. Airworthiness Department has been established decennary subsequently by the Royal Aircraft Factory ( as portion of the Air Ministry ) , which is the beginning of processs for company design blessings and approved informations. Aircraft airworthiness means conformity with applicable air power governments ordinances that defines the minimal safety degree of the aircraft, of the riders transported and the over flown districts. When designed and built harmonizing to applicable demands ‘ , When operated within its ‘ intended environment and within its ‘ quantified and declared restrictions, And maintained in conformity with processs acceptable to the responsible Authority. The European Aviation Safety Agency ( EASA ) Regulation 216/2008, Article 5, 2 ( degree Celsius ) defines the airworthiness as ; â€Å" Each aircraft shall be issued with an single certification of airworthiness when it is shown that it conforms to the type design approved in its type-certificate and that relevant certification, reviews and trials demonstrate the aircraft is in status for safe operation † The Airworthiness is a corporate duty of operators, governments, industries and care administrations. An airworthy aircraft is one where the likeliness of any incident or accident as a consequence of malfunction, public presentation or handling of the aircraft is kept to acceptable degrees. The lone existent step of airworthiness in usage is given by tracking and analysing incidents and accidents. The staying subdivisions will discourse the kernel of â€Å" Gaining and Maintaining Airworthiness † . Figure 01: Airworthiness – Corporate Duties Execution of Airworthiness Authority ( EASA ) assurance that the design of a merchandise complies with the applicable demands based on Certification of the administration ( IR 21 – DOA ) A ; Certification of the design of merchandises ( CS 25 – Technetium ) DO Approval Harmonizing to European Aviation Safety Agency ( EASA ) , Design Organisation Approval ( DOA ) demands Implementing Rule ( IR ) portion 21 ( published as extension to European Commission Regulation ( EC ) No 1702/2003 ) includes procedural demands applicable either to the industry ( Section A ) or to the Competent Authorities ( Section B ) but Part 21 does non include commissariats to depute EASA authorization and / or signature to persons. â€Å" Certification of aircraft and related merchandises, parts and contraptions, and of design and production administrations † Administrations must show following cardinal elements in order to obtain DO Approval. Design Assurance System Handbook Right Peoples Footings of Blessing Duties of the holder Figure 02 – DOA Key Elementss Design Organisation Approval ( DOA ) – Administration Structure Following diagram illustrates a simplified administration construction showing the indispensable elements in an aircraft design and fabrication administration. Figure 03: Design Administration Structure Chief Executive Officer ( CEO ) : Responsible for appropriate operation of the work topographic point by guaranting handiness of needed resources. Designated Certification Specialist ( DCS ) : Airworthiness specializer nominated for a given subject ( ATA or Sub-ATA degree or for Approved Manuals ) to transport out the enfranchisement undertakings, in peculiar to pull off the conformity presentation activities for their sphere. Part of the airworthiness map and act under the control of Product Integrity. Certification Manager ( CM ) Certification panel leaders for their country of competency, Participate in the development of new enfranchisement schemes The CM is the interface with Aviation Authorities at panel degree for primary TC, foreign enfranchisement / proof activities and for allocated major alterations. Chief Airworthiness Engineer ( CAE ) Responsible for taking and organizing the enfranchisement and airworthiness activities for the programme. Supported by a squad normally called the CAE squad composed of: A Type Certification Manger ( TCM ) An Individual Aircraft Certification Manager ( IACM ) A Continued Airworthiness Manager ( CAM ) Type Certification Type enfranchisement is the procedure showing that the design of an aircraft complies with the applicable air power demands. Certification procedure could be a new type certification new aircraft ( ex. Airbus A380 ) , Amended Type enfranchisement theoretical account or derivative ( antique: Airbus A350 – 1000 ) and important major alterations to the type design ( antique. A330-200 Passenger to Freighter ) To allow and EASA Type Certificate, aircraft industry shall obtain foremost a DOA ( Design Organisation Approval ) covering the relevant merchandise ( aircraft type ) and besides shall show its capableness to plan, attest and guarantee the continued airworthiness of its merchandises in conformity with the enfranchisement specification ( CS-25 ) and Environmental protection ( CS-34, CS-36 ) demands. To industry and release to service series aircraft, industry must so obtain a POA ( Production Organisation Approval ) and set up relationship between DOA A ; POA. Flight Trial Flight proving procedure could be potentially really hazardous and highly expensive due to unanticipated job s consequence in loss of life ( both crew and people on the land ) and harm to the aircraft. Due to this grounds modern flight testing is one of the most safety witting operations. Typically there are two types of flight trial plans, military and commercial. There is a important difference between military and commercial flight proving where commercial trial plans are carried out to attest the aircraft meets all needed safety and public presentation demands where as military plans involved in aircraft industries planing and edifice aircraft to authorities contracts to run into specific mission capablenesss. Initiation of flight trial readyings for both commercial and military aircraft commence good before the aircraft is ready to wing, although due to the fact that the authorities is funding the military undertakings, engagement of military flight proving is commence much earl y-on in the design and proving procedure. You read "Gaining And Maintaining Airworthiness Engineering Essay" in category "Essay examples" Historical Data Analysis Harmonizing to historical grounds, operational and airframe related hazard of a serious accident causes is about one per million flight hours but failure jobs occurred by aircraft systems jobs is about 10 per centum of this entire sum. Therefore, it is sensible to reason that systems mistakes should non allowed serious accidents and it is therefore possible for a new design to alter the chance of such a serious accident non to be greater than one per ten million flight hours ( 1 x 10-7 ) . But it is non possible to place whether the mark can be met until all the aircraft systems has been numerically jointly analysed. Due to this ground it ‘s assumed that there are about 100 possible failure conditions present randomly which could forestall safe flight and landing of the aircraft. By sharing out every bit the mark allowable hazard ( ten 10-7 ) every bit among these conditions risk allotment consequence in non greater than 1 ten 10-9 to each. Therefore the upper hazard bound for failure conditions would be 1 ten 10-9 for each hr of flight which approximates chance value for the term â€Å" Highly Improbable † . Analytic techniques Assorted analytical techniques have been developed in line with the above subject to help Airworthiness Authority and the applier to transport out a safety analysis, which could profit systematic qualitative analysis. This technique besides of import for analyst to execute quantitative appraisal when required. The Advisory Material Joint ( AMJ ) identifies both qualitative and quantitative analytical attacks which could used to back up JAA personal or assist applier to find the conformity with the demand. And it besides provides counsel for finding if or when a peculiar analysis to be conducted. The intended demand of the analytical tools is supplement but non to replace operational and technology opinion. Legal Issues To hold a basic apprehension of the legal demand is critical for air power professionals such as pilots, mechanics, air traffic accountants and executives. National and international Torahs or ordinances regulate all facets of civil air transit. To guarantee the effectivity of the legal model and enforceability of safety facets, the undermentioned basic groups of ordinances have been developed. Airworthiness Regulations to specify: Applicable processs, and Minimum safety, proficient and public presentation demands to be realised and maintain in the aircraft design. Ex-husband: EASA Part 21 ( aircraft enfranchisement processs ) , Part M and Part 145 ( aircraft care ) A ; CS-25 ( design codification for big aircraft ) Operational ordinances: to specify the basic regulations air traffic has to follow and the lower limit demands for certain sorts of operations, for the aircraft and the individual or the administration. Ex-husband: EU-OPS1 Commercial Air Transportation After an accident there is two chief probes ( proficient A ; legal proceedings ) will be conducted. Legal proceedings consist with ; Civil proceedings which involved in civil claims for amendss by victims and/or their relations, Commercial proceedings which involved in claims for amendss by client and/or its insurance company ( Aircraft fix / loss, Reduction in aircraft residuary value, Loss of gross ) and eventually Criminal prosecution, in instance of decease / serious hurt, in certain legal powers ( ex: France, Germany ) . Continued Airworthiness Harmonizing to ICAO Doc No 9760-2001 continued Airworthiness defined as ‘The procedures that guarantee, at any clip in its life, an aircraft complies with the proficient conditions fixed to the issue of the Certificate of Airworthiness and is in a status for safe operation. ‘ And recommends ‘Contracting provinces are required to hold a system that ensures aircraft are in a status for safe operation. ‘ F. Florio ( 2006 ) stated that safety is the most of import thing which has to be guaranting every clip in every flight operations and all the aeroplanes must be in an air worthy province which is suited for fly. In other words all the aircrafts must accomplish and execute all the processs in the Airworthiness Directive manuals. Furthermore, Florio ( 2006 ) besides mentioned that continued airworthiness can be rely on two factors Administration operators Care Care Care can be explained as changes, reviews, replacings of parts of the aircraft. This can be done by taking a record entry for each event such as replacing of LRUs ( Line replacement units ) . Harmonizing to Florio ( 2006 ) , Maintenance refers to as ‘preventive care, changes and fixs and debut of airworthiness directive ‘ and besides he stated that airworthiness is rely on the care programmes, which besides set up the replacing of clip alteration points, the inspection and repair engines, propellors and assorted parts of contraptions. Florio mentioned that as the portion of the merchandise type enfranchisements of aircraft airworthiness governments requires instructions for continued airworthiness therefore these instructions can be identified as the cardinal tools of the care because they are the basic care programmes. These care programmes must provide the demands of operational and care criterions. Harmonizing to EASA Maintenance programme ; Every aircraft shall be maintained in conformity with the care programmes approved by the competent authorization, which shall be sporadically reviewed and amended consequently. The care programme and any subsequent amendments shall be approved by the competent authorization The care programmes must set up conformity with ; Instruction manuals for go oning airworthiness issued by the type certification and the auxiliary type certification holder Instruction manuals issued by the complement authorization Instruction manuals issued by the proprietor or the operator and approved by the competent authorization. Repairs Repair procedure involves different administrations where, when the merchandises are non with aircraft industry, go oning airworthiness is governed by the province of register or the duties are spread out in administrations. Part 21A subpart M states the fix procedural demands for enfranchisement. Under Part 21 subpart Meter: Elimination of harm ( 21A.431 B ) Unrepaired amendss ( 21A.445 a ) Out of Part 21 subpart M Replacement without design activity ( 21A.431c ) Repairs design from an approved manual ( GM 21A.431 a ) Following diagrams illustrates the Airbus mending procedure. Figure 04: Airbus Repairing Procedure The Structure Repair Manual ( SRM ) describes general fix patterns, stuffs and typical fixs, allowed amendss, which are considered applicable to standard fixs. It ‘s approved by aircraft industry under DOR privilege. Alterations Changes made to a peculiar aircraft after the issue of the airworthiness certification is a alteration. This could include alterations to the constructions, systems, powerplants, propellors etc†¦ Furthermore, permutation of one type for another besides considered as a alteration. Any alteration requires blessing from the Civil Aviation Authority straight or via an sanctioned administration. During a design alteration, inside informations of the alteration must be given to the authorization at early phase where so the alteration is classified as child or major medicine harmonizing to the nature of the probe. If the result of an probe requires amendments to the Certificate of Airworthiness or Flight Manual, authorization may necessitate following major alteration processs. Incidents and Accidents Flight safety experts believe that series of events leads to incidents and accidents. Accidents – During the operation of an aircraft, consequence in happening associated with a individual being fatally or earnestly injured from the clip any individual boards to the aircraft with purpose of flight until the clip all individuals disembarked. Incidents – Other than accidents incidents besides occurrences which relate to the operation of the aircraft or could impact the safety of its operation. Aging Aircraft Civil Aviation authorization has defined Aging aircrafts as ‘An operational aircraft nearing the terminal of its design life premises ‘ ( Alder P. 2005 ) . Aging aircraft can besides be called as an older aircraft every bit good. Since the aircraft are industry to supply long permanent services for so many old ages, all the aircraft must be in an airworthy province and have to be safe to wing. Thus care programmes must be carried out to keep the aircraft and besides aircraft must be operated harmonizing to the makers ‘ recommendation. Florio F. ( 2006 ) stated that, older aircraft require extra attention and the care programmes must be carried out in a more specific manner than the late manufactured aircraft. And besides he stated that due to the weariness, inadvertent harm and besides due to the environmental impairment more review in the constituents of the construction must necessitate in care programmes. So to keep airworthiness in older aircrafts makers of the flight has to supply operators with the specific plans. In older aircrafts usually each of the airplane constituents have to undergo some of the fixs, inspection and repairs, review care, preventative care and some replacings of constituents of the aircraft. Care records have to be update on a regular basis by the operator. Florio F. ( 2006 ) states that between operator of the aircraft, maker and besides the authorization there should be an unfastened communicating system. Furthermore he states that one time a job occur the operator or the proprietor of the aircraft must inform it to the maker and so maker has to fix the recommendations and has to update the appropriate programmes of continued air worthiness. After scrutiny of those care programmes the governments will O.K. those. Role of the Regulator Airworthiness programmes consist of three chief functions. Regulator Implementer Research worker Civil Aviation Authority ( CAA ) , European Aviation Safety Agency ( EASA ) and Federal Aviation Regulations ( FAR ) are illustrations for the ordinance governments. These governments generate and distribute the ordinances for aircraft operations for air power industry. Civil Aviation Authority is the UKs independent specializer regulator. Their chief duty is to supply universe taking air safety environment in the air power industry. Aircraft licensing, care of specific airworthiness direction systems and economic ordinances, consumer protection, policies for air space and puting up national safety criterions can be taken as cardinal function of CAA. Regulators involved in few or many functions as follows: Puting up the civil air power criterions and guarantee they are achieved. Regulates and encourages air hoses, airdromes and national air traffic services economic activities etc†¦ Manages the chief travel protection strategy. Ensure the air space is a common topographic point for all users by conveying civil and military involvements together. Rede the authorities on air power issues. Represents consumer involvements Conduct scientific and economic research. Provide specializer services by bring forthing statistical informations. Conclusion A ; Recommendation Aircraft airworthiness means conformity with applicable air power governments ordinances that defines the minimal safety degree of the aircraft, of the riders transported and the over flown districts and when designed and built harmonizing to applicable demands, when operated within its ‘ intended environment and within its ‘ quantified and declared restrictions and maintained in conformity with processs acceptable to the responsible Authority. Therefore, The Airworthiness is a corporate duty of operators, governments, industries and care administrations. How to cite Gaining And Maintaining Airworthiness Engineering Essay, Essay examples

The Hazards of Risky Investments

Question: Describe about a Research Proposal in The Hazards of Risky Investments? Answer: Introduction In order to shield themselves from The Hazards Of Risky Investments Or Ventures, banks, investors and shareholders perform credit investigation of the health care organizations who apply for loans to banks or who issue shares in the market. Key piece of credit examination or analysis is financial examination or analysis done through taking into account monetary pointers. On the off chance that financial analysis or monetary examination gives attractive markers, banks perform more profound credit investigation which next to money related investigation likewise incorporates industry examination in which the association leads the business, their position inside of the business, nature of the administration and components of exchange structure such are contracts. fair examination of a credit candidate's such as that of an health care organizations money related angles gives significant data about its reliability. Investigation gives answer to address how the organization worked in past p eriod and it gives presumptions about future operations, i.e. whether the organization will have the capacity to reimburse credit commitments to bank or provide returns to the investors or shareholders. Financial analysis is performed on the part of banks taking into account financial and budgetary reports which organization delivers in the process of applying for a loan. These reports as produced by an health care organisation include income statement that depicts changes in profit earning performance which occurred in the organization over a financial year, balance sheet that shows money related position of the organization toward the end of an one year financial period, cash flow statement which offers assessment of different sources and use of cash in a financial year, report depicting changes in equity and accounting notes that contain data which are applicable for client's necessities about positions in accounting reports and in addition showcasing risks and vulnerabilities th at impact an organization (Berry, 2011). The accounting notes also contains data about topographical and mechanical sections, number of managers and staffs and other applicable information. Financial report analysis - horizontal and vertical Analysis of financial reports can be done through vertical as well as horizontal analysis. Financial reports can be understood in a better way in terms of comparisons and interrelations through both horizontal and vertical analysis (Oster, 2006). Vertical analysis The process of vertical analysis involves percentage examination of things from monetary report between two or more record periods and gives certain decisions about structure and changes in structure of benefits and liabilities. These progressions are then further broken down in point of interest, with the objective to comprehend watched changes. Vertical analysis depicts stakes in terms of percentages that are possessed on the part of various groups of stakeholders in the forms of assets. For vertical investigation or analysis of monetary record, absolute resources or total assets and aggregate or total liabilities are utilized as a base figure. For vertical investigation of statement of profit and loss, base sales figure is used which originate from offer of items, products and administrations on local and remote business sector. Horizontal analysis Horizontal analysis of financial reports speaks to correlation of parity positions in balance sheets of present and earlier year, and also positions in profit and loss statement of present and earlier year (Rees, 2008). It is indeed fact comparative examination of financial or money related reports. Point by point examination is required for distinguished changes as deviation, decrease or increment in estimation of position in financial or monetary report. Analysis of financial ratios Ratio analysis also known as proportion investigation of financial, accounting or budgetary reports speaks to each number which indicates connection between two elements in yearly financial records that include balance sheet, income statement, change of equity report and cash flow statements (Rodgers, 2008). In the context of a health care organisation, financial ratios or proportions are taken in to consideration in the process of investigation of credit candidate's business initiated on the part of credit officer of the bank. Signs got from proportion examination or ratio assessment lead credit officer to ask credit candidate certain inquiries and by that way finish money related investigation. Investigation or analysis of financial reports done by credit officers, put accentuation on capacity to give back the loan and dangers identified with credit candidate's business. With a specific end goal to rate credit capacity and business danger of credit candidate, credit officer must co nsider adequate number of ratios or proportions and focus their relationship (Rodgers, 2008). Ratio or proportion examination is advantageous in watching patterns in money related exercises of business entity, correlation of monetary qualities of particular business substance with other, business elements from the same business region or from the same branch and deciding reliance between elements which impact budgetary achievement of business element. Taking into account data assembled from specific pointers of ratio examination, financial indicator groups that can be recognized are profitability indicators, liquidity indicators, debt indicators, activity indicators and cost effectiveness indicators. Liquidity indicators During the time spent in analysis of ratios related to money related reports liquidity of credit candidate such as an health care organisation can be assessed. In this context, liquidity can be defined as the ability to repay within due dates and under characterized conditions thereby reflecting commitments toward banks (Wang, 2010). The major ratios capable of indicating liquidity position and performance of a health care organisation are current ratio, quick ratio, cash ratio and financial stability ratios. Current ratio Current ratio demonstrates organization's capacity to administer current liabilities with accessible current resources called current assets. This ratio is formed by studying connection between short-term liabilities and assets. Estimation of general liquidity proportion is contrasted with the same pointer in earlier year, and with proportions of the organizations from the same branch. On the off chance that the present proportion is underneath 1.5, there is a probability that the organization is not having enough short-term resources or assets for meeting short-term liabilities (Chattopadhyay, 2010). In the event that the estimation of current ratio or proportion is essentially higher than the sector average, this demonstrates that advantages are not utilized effectively in the industry and the organisation uses the current assets more efficiently than the industry as a whole. Quick ratio Quick ratio is calculated upon watching connection between current resources or assets less stock, and current liabilities. It ought to be min 1, which implies that present liabilities ought not be higher than current resources from which stock value has been deducted. Cash ratio Cash ratio has the ability to demonstrate the scope of current liabilities with money. It is trusted that this proportion should not be under 0.1 i.e. 10% (Chattopadhyay, 2010). Financial stability ratios Financial stability ratios indicate money related soundness of any organisation including health care organizations. This ratio is measured by putting in connection non-current assets or resources with long-term liability and equity. On the off chance that the ratio is higher than 1, it indicates shortfall of working capital. Debt indicators Debt indicators are the Obligation markers that point to the ways or mechanisms that are used by a health care organisation in the process of funding its assets. , i.e. how quite a bit of business is financed from own sources and how much from external sources such as loan (Bhattacharyya, 2007). These indicators or pointers speak to the level of danger for putting resources into an organization that is risk associated with investment. Health care organizations which are profoundly outfitted in terms of debt may have issues discovering new financial investors and thus lose financial flexibility, so they confront the danger of bankruptcy. Then again, if the ratio is under control and loans are utilized appropriately, it can bring about expansion of rate of profitability. Most broadly utilized debt indicators are debt-to-equity ratio, debt-to-assets ratio, equity-to-assets ratio, leverage factor and interest coverage ratio. Debt-to-assets ratio The debt-to-assets ratio or proportion demonstrates the degree to which an organization utilizes debt as one form of financing. The higher the proportion of debt against assets, the more prominent is monetary danger, and the other way around, the bringing down of the proportion of obligation to resources means lower money related danger (Buffett and Clark, 2008). The estimation of this proportion ought to be 0.5 or less. It can be ascertained by separating aggregate liabilities with aggregate resources. Debt-to-assets ratio = Total liabilities / Total assets Equity-to-assets ratio This ratio or proportion demonstrates how quite a bit of organization's value is included into organization's business. It is better if the worth is more than 0.5, which ensnares that organization is financed by its own value more than half. It is ascertained in the accompanying way: Equity-to-assets ratio = Equity / total assets Debt-to-equity proportion This debt indicator ratio demonstrates the extent of obligations or aggregate liabilities of an organization to its equity or value (Durham, 2001). This pointer becomes prominent with development of liabilities in value structure. Maximum point of confinement for this ratio is typically 2:1 (Buffett and Clark, 2008). High value of this marker focuses to conceivable challenges in returning acquired finances and interest installments. This ratio can be calculated in the following way Debt-to-equity ratio = Total liabilities / total assets Interest coverage ratio shows how much business earnings can drop without jeopardizing payments of interest. It gives information how much are interest expenses covered with companys earnings before tax. It is calculated in the following way: Interest coverage ratio =EBIT/Annual interest expense Higher result is desirable, because it means that the risk of not paying interest is lower. This indicator is good for orientation when deciding about asking financial organizations for a loan, i.e. it shows whether the credit applicant is in a position to pay interest cost for a credit it would potentially ask. Leverage factor shows how many years it would take for a credit applicant to pay its liabilities under existing business terms and profits. It is calculated in the following way: Leverage ratio/factor = total liabilities/(net profit + depreciation) Observed from the aspect of companys business security, it is implied that smaller leverage factor means higher security and vice versa. Controlling measure for this factor is 5 years, which means that if a company is able to repay all its liabilities within 5 years it is solvent and not overdue. Interest coverage ratio Interest coverage ratio depicts the extent to which earnings of a business can drop without putting payments of interest at risk. In other words, this ratio indicates the extent of coverage of interest on the part of EBT of an organisation (Bendrey et al., 2004). The same is true for all health care organizations as well. This ratio is calculated in the following manner Interest coverage ratio = EBIT/Annual interest cost. Higher result is attractive, in light of the fact that it implies that the danger of not paying interest is minimal. This marker is useful for introduction when choosing about approaching monetary associations for a loan, i.e. it indicates whether the credit candidate is in a position to pay interest expense for a credit it would possibly inquire. Leverage ratio Leverage ratio indicates the time that can be taken on the part of a credit candidate in the process of paying liabilities based on existing terms and conditions (Wang, 2010). It is figured in the accompanying way: Leverage ratio or leverage factor = total liabilities/(net income + depreciation) Observed from the part of organization's business security, it can be stated that small leverage ratio implies higher financial security and the other way around large leverage ratio implies lower financial security. Optimum measure in this context is 5 years which implies that if an organization has the capacity reimburse all liabilities within a period of five year, it can be considered solvent (Bendrey, Hussey and West, 2004). Activity indicators Activity indicators fall in the group of turnover ratios and are measures of achievement of an organisation in dealing with business assets (Morley, 2003). They demonstrate flow velocity of assets in a business process. General recipe for computing turnover proportion is: Turnover ratio = Sales / average balance. Average balance is calculated by considering sum of bookkeeping balance at the beginning and end of the year and after that divided with 2 [(previous year + current year)/2]. From the part of credit investigation, the activity ratios that are very important are current asst turnover ratio, total asset turnover ratio, accounts receivable turnover ratio, creditors turnover ratio and inventory turnover ratio (Brigham and Gapenski, 2003). Current asset turnover ratio This ratio or proportion demonstrates how frequently current resources of the organization are turned over during a fiscal year. This proportion measures proficiency with which an organization utilizes current advantages for make a benefit inside of a business cycle. It is figured in the accompanying way: Current asset turnover ratio = Sales/Average current assets Average collection period Average collection period can be calculated if turnover proportion is known. the same is ascertained with the accompanying equation Average collection period = 365/Turnover proportion Total asset turnover ratio This ratio indicates how often add up resources of the organization are turned over inside of a year, i.e. how effective is an organization in utilizing its assets for making benefit (Brigham and Gapenski, 2003). It is ascertained in the accompanying way: Total asset turnover = Sales/Average total assets Inventory or stock turnover proportion This ratio shows proficiency in utilizing and overseeing aggregate supplies, which has the impact on expansion in organization's benefit. It is figured in the accompanying way: Inventory turnover proportion = Sales/Average stock Low proportion implies that the organization is utilizing its benefits as a part of non-profitable way and focuses to stock of poor quality (obsolete, ruined). It is additionally conceivable that organization has specific measure of old stock which is not being utilized, while others have great turnover (Brigham and Gapenski, 2003). Too high stock turnover proportion focuses to actuality that the organization most likely regularly comes up short on stock and in this manner loses its clients. Account receivable turnover This ratio indicates what number of financial units of sales can be accomplished with 1 unit put in accounts receivable. It is figured in the accompanying way: Account receivable turnover proportion = Sales/average accounts receivable Average collection period Average collection period can be ascertained in the accompanying route: Collection of accounts receivables =365 days/Account receivable turnover proportion Average collection of records receivable may increase to imply that organization has an issue with gathering receivables and vice versa (Helfert and Helfert, 2001). Accounts payable turnover ratio This ratio shows in how long by and large an organization is paying its suppliers, i.e. how long are between snippet of procurement and snippet of paying the suppliers. It is computed in the accompanying way: Account payable turnover ratio = Value of total purchase of products and materials in a year/average accounts payable Profitability indicators Profitability indicators associate benefit with deals income and ventures, and by watching them altogether they demonstrate organization's business achievement (Johnson, 2008). Important profitability indicators are in the context of a health care organisation are gross profit margin, net profit margin, return on assets and return on equity. Gross profit margin This ratio indicates the amount of gross benefit is created per unit of business income. Each increment in estimation of this marker is consider being great, and abatement in worth focuses to challenges in organization's business and can be one of the pointers of business emergency (Palmer, 2012). Gross profit margin in ascertained in the accompanying way: Gross profit margin = Gross profit Net profit margin This ratio is the most exact marker of consequences of completed business exchanges and shows what rate of income is left as benefit which is at transfer to an organization. It is computed in the accompanying way: Net profit margin = Net profit / revenue Return on assets (ROA) ROA is organization's capacity to make benefit by utilizing accessible resources, that is, it demonstrates the seriousness of organization's advantages (Paramasivan and Subramanian, 2009). Return on resources can be ascertained in the accompanying route: Return on assets= Net profit / total assets Return on equity ROE) This ratio is an indicative of benefit of shareholder's value and indicates what number of money related units of benefit organization makes per unit of shareholder's value. It is ascertained in the accompanying route: Return on equity = Net income / shareholders equity When benefit of own value is contrasted with gainfulness of advantages with the interest which mirrors the expense of credit capital, it is conceivable to make decision about productivity of utilizing own capital contrasted with advanced capital (Shim and Siegel, 2000). In the event that productivity rates of own capital are high, significantly higher than rates of benefits gainfulness, organization would be better of utilizing credited capital, and the other way around. Effectiveness indicators Effectiveness indicators measure connection in the middle of benefit and cost, and show the amount of benefit is made per cost unit. These markers ought to be over 1, in light of the fact that the higher they are, the more benefit is earned per cost unit (Horrigan, 2011). Important effectiveness markers are Revenue to cost ratio calculated as total revenue / total costs and cost of revenue to sales ratio which is calculated as sales revenue / cost of sales. Conclusion Business achievement of each bank is indicated in its capacity to oversee dangers to which it's uncovered. Since credit exchanges convey the most elevated danger, they ought to be sufficiently assessed and this in turn aids in taking appropriate lending decisions (Horrigan, 2011). To bring down the level of danger to which they are being uncovered when affirming the credit to a business substance, banks perform money related investigation of credit candidate's business such as that of a health care organisation. The ability of an organisation in paying insurance premium can also assessed through credit analysis. In light of monetary investigation banks, i.e. credit officers assess money related quality and business execution of the customer altogether, and from that they assess ability of credit candidate to reimburse affirmed credit. Better performance in terms of credit repayment capacity can improve bond rating of the organisation. Reliability assessment of credit candidate's busi ness ought to be performed in views of balance sheet, income statement and cash flow statement. References Barrow, C. (2011). The 30 day MBA in business finance. Philadelphia: Kogan Page. Bendrey, M., Hussey, R. and West, C. (2004). Essentials of financial accounting in business. London: Thomson Learning. Berry, L. (2011). Financial accounting demystified. New York, NY: McGraw-Hill. Bhattacharyya, H. (2007). Total management by ratios. New Delhi: Sage Publications. Boatright, J. (2008). Ethics in finance. Malden, MA: Blackwell Pub. Brigham, E. and Gapenski, L. (2003). Financial management. Chicago: Dryden Press. Buffett, M. and Clark, D. (2008). Warren Buffett and the interpretation of financial statements. New York: Scribner. Chattopadhyay, P. (2010). Solvency and liquidity ratios. Bombay: Commerce. Cinnamon, R., Helweg-Larsen, B. and Cinnamon, P. (2010). How to understand business finance. London: Kogan Page. Durham, J. (2001). Sacrifice ratios and monetary policy credibility. Washington, D.C.: Division of Research Statistics and Monetary Affairs, Federal Reserve Board. Eiteman, D., Stonehill, A., Moffett, M. and Kwok, C. (2001). Multinational business finance. Reading, MA: Addison-Wesley Longman. Helfert, E. and Helfert, E. (2001). Financial analysis. New York: McGraw-Hill. Horrigan, J. (2011). Financial ratio analysis. New York: Arno Press. Johnson, R. (2008). Financial management. Boston: Allyn and Bacon. Melnyk, Z. and Barngrover, C. (2005). Cases in business finance. Homewood, Ill.: R.D. Irwin. Morley, M. (2003). Ratio analysis. Berkshire, England: Published for the Institute of Chartered Accountants of Scotland by Gee Co. Oster, S. (2006). Modern competitive analysis. New York: Oxford University Press. Palmer, J. (2012). Financial ratio analysis. New York, N.Y.: American Institute of Certified Public Accountants. Paramasivan, C. and Subramanian, T. (2009). Financial management. New Delhi: New Age International (P) Ltd., Publishers. Peirson, G. (2002). Business finance. Roseville, N.S.W.: McGraw-Hill. Rees, B. (2008). Financial analysis. London: Prentice Hall. Rodgers, P. (2008). Financial analysis. Oxford: CIMA. Shim, J. and Siegel, J. (2000). Financial management. Hauppauge, N.Y.: Barron's. Wang, M. (2010). Using liquidity, solvency and repayment capacity indicators to analyze representative farm service agency farms in Florida.

10 Interesting Facts About Gold

10 Interesting Facts About Gold There are many interesting facts about the element gold, which is listed on the periodic table as Au. This is the only truly yellow metal on Earth, and theres a lot more to learn about gold. Gold Facts Gold is the only metal that is yellow or golden. Other metals may develop a yellowish color, but only after they have oxidized or reacted with other chemicals.Nearly all of the gold on Earth came from meteorites that bombarded the planet over 200 million years after it formed.The element symbol for gold is Au. The symbol comes from the old Latin name for gold, aurum, which means shining dawn or glow of sunrise. The word gold comes from the Germanic languages, originating from the Proto-Germanic gulà ¾ and Proto-Indo-European ghel, meaning yellow/green. The pure element has been known since ancient times.Gold is extremely ductile. A single ounce of gold (about 28 grams) can be stretched into a gold thread 5 miles (8 kilometers) long. Gold threads can even be used as embroidery thread.Malleability is a measure of how easily a material can be hammered into thin sheets. Gold is the most malleable element. A single ounce of gold can be beaten out into a sheet that is 300 square feet. A s heet of gold can be made thin enough to be transparent. Very thin sheets of gold may appear greenish blue because gold strongly reflects red and yellow. Although gold is a heavy, dense metal, it is generally considered non-toxic. Gold metal flakes may be eaten in foods or drinks.Pure elemental gold is 24 karat, while 18 karat gold is 75 percent pure gold, 14 karat gold is 58.5 percent pure gold, and 10 karat gold is 41.7 percent pure gold. The remaining portion of the metal usually used in gold jewelry and items is silver, but items may also consist of other metals or a combination of metals, such as platinum, copper, palladium, zinc, nickel, iron, and cadmium.Gold is a noble metal. It is relatively unreactive and resists degradation by air, moisture, or acidic conditions. While acids dissolve most metals, a special mixture of acids called aqua regia is used to dissolve gold.Gold has many uses aside from its monetary and symbolic value. Among other applications, it is used in electronics, electrical wiring, dentistry, electronics, medicine, radiation shielding, and to color glass.High purity metallic gold is odorless and tasteless. T his makes sense since the metal is unreactive. Metal ions are what confers flavor and odor to metallic elements and compounds.

Presidents Who Never Won a Presidential Election

Presidents Who Never Won a Presidential Election There are only five presidents in American history who never won a presidential election. The most recent was Republican Gerald Ford, the 38th president of the United States. Ford served from 1974 to 1977 and then left office in electoral defeat. Where some others assumed the presidency under tumultuous or tragic circumstances and then went on to win a second term, Ford is among a handful who failed to convince voters to return him to power after he ascended to the White House because his predecessor resigned. The other presidents who never won presidential elections were John Tyler,  Millard Fillmore,  Andrew Johnson, and  Chester A. Arthur. Ford is also among fewer than a dozen one-term presidents  who ran for second terms but were denied by voters. So How Did Ford Become President? Ford was serving as vice president in 1974 amid scandal in President Richard M. Nixons administration. He ascended to the presidency when Nixon resigned before he was to face prosecution over the 1972 break-in at the Democratic Partys headquarters in what became known as the  Watergate scandal. Nixon was facing certain impeachment at the time.   As Ford said in taking the Oath of Office:  I assume the Presidency under extraordinary circumstances. This is an hour of history that troubles our minds and hurts our hearts. Did Ford Run for Re-Election? Yes. He won the Republican presidential nomination in 1976 but lost in the general election to Democrat Jimmy Carter, who went on to serve one term. Fords political fortunes sank amid a depressed economy, inflation, and energy shortages at home.   Ford and Carter had engaged in what is believed to be among the most important political debates in political history. The debate, many historians believe,  proved disastrous to Fords bid for a second term in the White House. Ford famously claimed, erroneously, the following: There is no Soviet domination of Eastern Europe and there never will be under a Ford administration. Fords statement was met with incredulity from moderator Max Frankel of  The New York Times  and served to tarnish his campaign. What About the Others Who Didnt Win Election? John Tyler became president when President William Henry Harrison died in office in 1841. Tyler could not muster enough support to sustain a legitimate presidential campaign.  Millard Fillmore became president when Zachary Taylor died in 1850. Fillmore sought his partys nomination for a second term but was denied.Andrew Johnson became president when Abraham Lincoln was assassinated in 1865. Johnson did not run for office after being impeached by Congress.  Chester A. Arthur became president after James Garfield was assassinated in 1881. Arthur did not run for re-election.

Money launderindg and terrorism financing Essay

Money launderindg and terrorism financing - Essay Example From the process of establishing an anti-money laundering enforcement initiative, there comes out the counter-terrorism financial enforcement regime. Separating terrorists from their money is undeniably a critical component of the war on terrorism. As many now more fully appreciate, attacks like those of September 11 necessitate money to construct and maintain terrorist training camps, to buy weapons, communications equipment, and forged documents, to move personnel and materiel, to bribe government officials and establish front companies, and to pay for operatives' rent, food, and other basic necessities, along with special activities like flying lessons. More often than not, the terrorist money trail originates or leads overseas. For the purpose of stemming the tide to transnational crime, governments and international organizations continued their active efforts to increase regulatory and criminal enforcement of various laws in 1998. Such efforts were reflected in the criminalization of business and financial transactions, the imposition of new due diligence measures on the private sector and the concomitant weakening of privacy and confidentiality laws, strengthened penalties for non-compliance with regulatory efforts, and new law enforcement techniques (undercover sting operations, wiretapping, expanded powers to search homes and businesses, and controlled deliveries (Zagaris 1999). Transnational crimes involve money laundering which weaken economies and destabilize governments that are blamed on crime cartels, tax havens, and new techniques like cyber laundering. Though some would claim that it is not always a crime and immoral (Morris-Cotterill 2001), by definition alone, money laundering involves hiding, moving, and investing the proceeds of criminal conduct. In such a case, legal money can even become illegal if by moving it violates a country's foreign-exchange controls or other financial regulations. Correspondingly, all foreign-exchange transactions out of a certain country must be reported to their respective central bank otherwise the exported money becomes illegal. International Human Rights Protection Throughout the world, proactive policing has produced transformations in international criminal cooperation law particularly in the development of a financial enforcement regime. As a result of the September 11 terror attack, the United States and the European Union formed a close cooperation in cutting off terrorists from their sources of funding. It includes the issuance of blocking assets of 21 identified people as members of the Basque group ETA. The collaboration between the EU and US symbolizes a new and extremely important chapter in the financial war against terrorism (as cited in Dettmer 2002). The seizing of assets to the identified terrorists is considered a crucial element in any long-term operations in taking down Osama bin Laden's al-Qaeda network along with other terrorist groups. This effort of collaboration also strengthen the protection of human rights to both parties from another potential terror attack. After the September 11 Following the fateful terrorist attack on September 11 is the tracking down of terrorists that lead to a search for the means of uncovering the

High frequency trading Research Paper Example | Topics and Well Written Essays - 500 words

High frequency trading - Research Paper Example Another disadvantage that faces the average investor is the ability to withdraw and initiate thousands of trades at multiple pricing points within the same period. This makes it difficult to understand what is or is not legit (Petajisto 273). Further, the ability of these programs coming up with the upper buy range and lower sell range can create security for one individual and insecurity for the other. It becomes very difficult to have the average investor coming up with a substantial amount because the investors privy with HFT could sell below the limit forcing an individual to pay more compared to normal circumstances. The fact that they attain the information seconds earlier allows them to have an edge that disadvantages the investors, exposing them to risks (Aldridge 65; Kirilenko, Kyle, Samadi & Tuzun 25). Many will look at this from the angle of having more to do with one’s trading sessions, but the unleveled playing field makes it worse. The securities exchange should rein on such behaviors and provide the investors with a fair chance of meeting these ideals. Regulations are necessary in this sector. Investors need to operate within similar platforms as a way of encouraging them to make better use of the skills present. One thing that can be done is creating stronger controls that will create safety nets around the trading options (Aldridge 67). This will enable the government to provide the stock exchanges with the required platforms that will help reduce the market instability through the proper utility of the incentives provided. Markets will also benefit a lot if information was not disseminated before hand, allowing all traders to benefit from what they possess, rather than generate new platforms that do not define the market as a whole (Petajisto 274). Ideally, the traders will have to get clearing before some of the tools can be used, something the government needs to pay great attention to. By limiting the risks, it is very

Marcel Duchamp - Modern Painting Essay Example | Topics and Well Written Essays - 2000 words

Marcel Duchamp - Modern Painting - Essay Example The essay "Marcel Duchamp - Modern Painting" discusses the works of Marcel Duchamp. The techniques of representation, canonized by the Renaissance masters, were accepted by artists until the late nineteenth century just as the musicians had accepted the rules of tonality. However, constant repetition had weakened their effectiveness, and change seemed to be demanded. The beginnings of change we have already noted in Impressionistic painting, which put the emphasis less on the subject represented and more on the attitude of the artist toward his subject. This changed emphasis led artists to Abstraction, which must be thoroughly understood because it is the basis of much of modern art. The verb â€Å"abstract† has two meanings: â€Å"to take away† and â€Å"to summarize.† Both meanings were known and employed by the old masters. Cubism is a form of abstraction in which objects are first reduced to cubes and then flattened into two-dimensional shapes arranged in ove rlapping planes. In â€Å"Nude Descending a Staircase† by Marcel Duchamp we find another preoccupation of analytical Cubism: that of expressing sequential movement in time. The Cubist thus opened up many new possibilities in visual experience. The movement to regain structure in painting was initiated by Cezanne, who is known as the Father of Cubism. He advised painters to â€Å"treat nature by the cylinder, the sphere, the cone, everything in proper perspective, so that each side of an object or a plane is directed toward a central point.†

Development of Sustainable LED Lighting for Offices

Development of Sustainable LED Lighting for Offices CHAPTER 1 INTRODUCTION 1.1: Study Background Climate change is rapidly increasing in our environment due to an increase in gases such as carbon dioxide and methane produced by humans and animals in the Earths atmosphere. As humans we have a moral responsibility to control and save the environment. The built environment is one of the major impacts towards greenhouse gas emissions. Designers are now pressured to design sustainable buildings that have less impact on emissions that damage the environment. The term sustainability means to save natural resources for future generations. Many buildings indirectly use resources such as fossil fuels which are converted into energy. Lighting systems in buildings consume some of this energy. Lighting accounts for around 15% of the energy bill in most homes, and around 25% in commercial buildings. It is supplied by electrical power plants using fossil fuels, and is responsible for a significant percentage of carbon dioxide emissions (Marshall 2009) To help combat how we as consumers use electric lighting an alternative can be achieved via sustainable lighting. Sustainable lighting can be defined as, Lighting that meets the qualitative needs of the visual environment with the least impact on the physical environment. (Service Lamp Corp. 2001) Light is an electromagnetic radiation, which means it is partially electric, magnetic and radiates.   Light starts off from atoms (electrons that orbit the nucleus). When energy is absorbed by an atom the electrons shift up to a bigger orbit. When the atom loses the energy the electrons shift back down to the original orbit, while the electrons shift back down they emit light in the form of electromagnetic radiation. (Sarlina 2009) This document will review material on lighting systems in the office environment. The document will start with a brief history of the light bulb and then go on to how humans interpret light. The document will discuss how LED technology would be utilised more in offices and discuss the importance of migrating to LED lighting systems in offices for a more sustainable environment. The thesis will include three known case studies on LED lighting installed in offices to gather and compare data in order to evaluate how LED lighting would suffice in real life environments. 1.2: Brief History The history of modern lighting starts off with the invention of the arc light in 1810 by Humphrey Davy. This worked by connecting a battery to a strip of charcoal using two wires. The strip of charcoal was charge with electricity and glowed. (Jacks 2003) In 1820 Warren De La Rue used a piece of platinum placed inside a tube.   A current was passed through the tube and the platinum lit well but the bulb did not go into production because platinum was very expensive. (Jacks 2003) A chemist and physicist Joseph Wilson Swan produced a workable electric light in 1860 which he patented as an incandescent light bulb with a filament made from carbonised paper within a partial vacuum. J. W. Swan improved on the invention in 1875 he changed the filament to a compressed and carbonised fibrous cotton thread filament. (Jacks 2003) An inventor called Thomas Alva Edison bought Josephs Swans patent from a company who owned the patent.   Thomas Edison worked on the light bulb to increase the life span. In 1880 Thomas Edison invented his Bamboo fibre filament lamp which lasted for 1200-1500 hours. (Jacks 2003) In 1903 Willis Whitnew invented the tungsten filament lamp (commonly used today). The tungsten lamp had a carbon filament with a metal-coating. This stopped the problem with the bulb turning dark as Thomas Edisons bulb did. (Jacks 2003) Technology today has advanced to new methods of lighting. Light emitting diode (LED) technology is now at the centre point of attention as LED lighting has many advantages with being very energy efficient, long lasting and produces less heat compared to standard incandescent or halogen bulbs. 1.3: Dissertation Structure The dissertation is divided into a sequel of five chapters. The first chapter focuses on climate change and the need to for a more sustainable built environment, a brief history into the light bulb, aims and objectives of this dissertation and the logic behind the dissertation. Chapter two is a detailed literature review which focuses on the effects of lighting on building occupants followed by government legislation, then comparing different types of lighting and leading onto research on LED technology. The information gathered is sourced from websites, government documents, books and scientific journals. Chapter three follows on from the literature review. This chapter focuses on the structure for the dissertation; firstly explaining the reason for using a literature review and then drawing on three major case studies have been chosen and all cases deal with LED lighting systems within office spaces. From the case studies the author has analysed and interpreted information.   The primary data gathered will be in the form of a qualitative questionnaire sent to lighting experts (via email) who have been involved with the case studies. The Answers have been analysed and compared to get a wide knowledge from accredited professional opinions. The fourth chapter researches into the three chosen case studies, all case studies are analysed and compared to give an overview of how effective having an LED lighting system is in an office environment. The fifth chapter discusses the results gathered from the findings. This would give an overview to the dissertation and show the key findings into answering the key questions. The final chapter will draw up conclusions as to the impact of LED lighting in office environments. The chapter addresses the original research question in the context of the findings and provides final conclusions on LED lighting and making use appropriate references where necessary. 1.4: Aim and Objectives The author has chosen sustainable LED lighting as the subject area in this dissertation. The question the author would like to propose will be: Why arent there enough office buildings using LED lighting systems? Also what effects do LED lighting have on users working in an office environment; would LEDs be beneficial for health and comfort on a psychological basis? To address the question the author will explore this main aim: The aim of this study is to research into the sustainability of LED lighting systems and how lighting can affect building users within an office environment. The author will aim analyse case studies on LED lighting systems in offices. What are the advantages and disadvantages? How would an LED lighting system be best suited for the office environment in terms of efficiency, comfort, reliability and short long term costs? The author will interview people from case studies drawn to gather primary qualitative information to reach a final conclusion. The actions the author will take to help answer the research question are listed below: Literature review, take into account of the building regulations, effects of artificial lighting on building occupants, types of artificial lighting and researching into books, case studies, reports, journals and websites related to LED lighting and other sustainable lighting systems. Research case studies on LED lighting systems that have been installed in offices. This would give the author an insight on how LED lighting systems have been successful in a real life environment. Interview researchers from case studies. Ask questions about how LEDs are designed to fit in a working office environment. Any issues that have occurred within the buildings. 1.5: Hypothesis In the United Kingdom there are very few offices if any that use an LED lighting systems to light up an office space. This could be due to lack of awareness, economic climate, social environment and lack of technology available to solve prob lematic conditions. 1.6: Key questions 1. How does light effect building users in terms of health? 2. How would LED lighting benefit offices and the environment? 3. Why isnt there many offices using LED lighting systems? 4. What is the current market like for LED lighting? Would there be a future for more LED lighting in offices? CHAPTER 2 LITERATURE REVIEW 2.1: Introduction This chapter researches into the effects of lighting on buildings occupants, legislation, different types of lighting and LED technology in detail. The aim for this literature review is to obtain information on how light is transcribed in the circadian system and the effects of light on human health. Legislation is a key issue for lighting. it regulate on the amount of light required for the appropriate tasks usually attained in different buildings, by learning legislation it would give the author an understanding into what requirements an office would need for good lighting. All information collated are from secondary and tertiary sources; for this literature review the information is found in books, journals, web pages, and government documents. 2.2: Effects of lighting on building occupants Lighting affects all building occupants on the way they perform tasks. There are different levels of lighting in different environment; the colour of light used in offices would tend to have a blue-white colour to promote concentration and light used in public areas would be a warmer yellow colour so building occupants would feel more relaxed in this type of environment. Too much light can cause health problems such as increased stress levels, headaches and higher blood pressure to the building occupant. (H.E.S.E, 2009) (Boyce, 2003 pp. 160) stated that Most apparently visual tasks have three components; visual, cognitive, and motor. Every task is unique in its balance between these components and hence in the effect lighting conditions have on task performance. (Boyce, 2003 pp. 160) also stated that Lighting conditions can affect task performance throught three systems, the visual system, the circadian system, and the perceptual system. the impact   of lighting conditions on the visual system and hence on visual performance is determined by the size, luminance contrast, and colour difference of the task and the amount, spectrum, distrbution of the lighting. The point that   (Boyce, 2003) makes is that light sent to the visual system affects the performance of the information relayed in the brain.   (Cuttle, 2008 pp. 5-6) stated The optical system of the human eye focuses an inverted image onto the retina, shown in Figure 1. This image is constantly changing with movements of the head and the scanning movements of the eyes. It is often said that the eye is like a camera, but the only similarity is that it forms a focused image in which, for every pixel, there is a corresponding element in the luminous environment. The distribution of luminance and colour that comprises the retinal image is modified by light losses that occur in the optical media of the eye, and these losses are not constant as they increase significantly with age. (Cuttle, 2008) Both books express points about how light is interpreted in the human brain differently but they both correlate how light can affect a building occupant. They both state how light is interpreted in the visual system. A research journal on Light Much More Than Vision written by Mark. S. Rea (Ph.D.) Discuses how lighting can affect the circadian system in building occupants. The journal questions if offices, school and homes are providing good lighting practises. The journal begins with an abstract on the impact of light on the circadian system The amount of light, its spectral composition, spatial distribution, timing and duration needed for vision is so different from that needed for circadian functioning, that generalizations about good lighting will have to be assessed by two very different sets of criteria in the future. (Mark. S. Rea, 2007) The journal continues on how light is interpreted in the human circadian system Light is presently and formally defined as optical radiation entering the eye that provides visual sensation. An international system of photometry has been developed and institutionalized to quantify, measure and communicate the properties of light as it affects the human vision. (Mark. S. Rea, 2007) This statement explains how light is communicated in human vision.   Practical sources of light allow humans to read material, move around spaces, drive cars, create social interaction between other users and allow user to do other activities. Under spatial distribution the journal states Through optical refraction by the cornea and lens in the eye and by neural-optical enhancements by in the retina, the spatial distribution of objects and textures in the environment can be processed by the visual system. Arguably accurate rendering of the spatial distribution of light in our environment by our retina is essential to our survival because   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   patterns of light and dark provide information needed by the visual system (Mark. S. Rea, 2007) The journal concludes with So, Are we providing healthy light in our offices, schools and homes? Probably the answer is No, we are not. Certainly we are not providing or specifiying the ideal lighting technologies and applications for the circadian regluation (Mark. S. Rea, 2007). This would bring on the question as to wether LED lighting would provide the answer to good lighting. LED has been evolving for years, they have been specifically modified to provide comfortable lighting levels for which a user could carry out certain visual functions. 2.3: Legislation The Kyoto agreement is a protocol made by the United Nations Framework Convention on Climate change. This main aim of the protocol is to stabilise greenhouse gas emissions. There are four greenhouse gases that the protocol focuses on (carbon dioxide, nitrous oxide, methane, sulphur hexafluoride). The United Kingdom Government is legally tied to the Kyoto agreement and has set out targets to meet emission rates. A document on The Kyoto Protocol by British-Energy states The UKs commitment under the protocol is for a reduction in greenhouse gas emissions of 12.5% from 1990 levels by 2008-2012. This implies an 8% reduction in CO2 emissions over this time period. The UK government also has an aspirational target for itself of a 20% reduction of CO2 emissions by 2010, demonstrating the importance of this issue for the current government.(British Energy, 2009) Offices contribute towards the CO2 emissions given off around the planet. A lot of the energy used in offices is mainly caused by office lighting. The new advancements in LED lighting could reduce the amount of energy used because LED lighting is the most sustainable type of artificial lighting. This could help aid the efforts of the Kyoto Protocol and help meets emission targets. Approved Documents Part L of the building regulations is split up into four documents. Part L1A and L1B focuses on conservation of fuel and power in domestic buildings, part L2A and L2B focuses on conservation of fuel and power in non domestic buildings. As of 6th April 2006 the revised Building Regulations Part L Conservation of Fuel and Power came into effect. The updated regulations would improve energy standards by 40 percent from that of the 2002 Building Regulations (ODPM, 2006). There are four approved documents published by the Office of the Deputy Prime Minister (ODPM, 2006): Approved Document L1A: Conservation of fuel and power (New dwellings) (2006 edition) Approved Document L1B: Conservation of fuel and power (Existing dwellings) (2006 edition) Approved Document L2A: Conservation of fuel and power (New buildings other than dwellings) (2006 edition) Approved Document L2B: Conservation of fuel and power (Existing buildings other than dwellings) (2006 edition) L1 Domestic buildings Conservation of fuel and power in dwellings. Limiting heat loss through fabric of dwelling from hot water pipes used for space heating. Limiting heat loss through hot water vessels and service pipes. Use control systems on space heating and hot water systems so that energy can be used efficiently. Use control systems on lighting systems so that energy can be used efficiently. L2 Buildings other than dwellings Conservation of fuel and power in non domestic buildings. Limiting heat loss through fabric of dwelling from hot water pipes used for space heating. Limiting heat loss through hot water vessels and service pipes. Use control systems on space heating and hot water systems so that energy can be used efficiently. Providing lighting systems with sufficient controls so that energy can be used efficiently. Limiting exposure to solar heat gains. Use control systems on air conditioning and mechanical ventilation systems so that energy can be used efficiently. Commissioning the building engineering services so that they make efficient use of energy and recording their performance. Approved Document L2A: Conservation of fuel and power highlights what is required for lighting efficiency in offices, industrial and storage areas in all building types. The document states For the purposes of this Approved Document, office areas include those spaces that involve predominantly desk-based tasks, including classrooms, seminar rooms and conference rooms, including those in schools. Reasonable provision would be to provide lighting with an average initial efficiency of not less than 45 luminaire-lumens/circuit-Watt as averaged over the whole area of these types of space in the building. (ODPM, 2006 pp. 19) LED lighting has the potential to excel past the average guide for initial efficiency of 45 lumens per watt. A breakthrough from the lighting company CREE states LED efficacy test results that set a new benchmark for the LED industry. Cree reported results of 131 lumens per watt white LED efficacy, confirmed by the National Institute of Standards and Technology in Gaithersburg, Maryland. Tests were performed using prototype white LEDs with Cree EZBrightâ„ ¢ LED chips. (CREE Inc, 2009) The CIBSE Lighting Guide 7: Office Lighting gives a guidance of how to layout lighting systems within an office to give the maximum efficiency of lighting and how much light is required for different types of office spaces. The guide states There are many ways to light an office space: with direct light down from above, from indirect light bounced from the ceiling, or from a combination of both. Many factors will dictate or influence the choice of which technique to use.   (Ruffles, 2005 pp. 7) There are many different building types and each office would need a lighting system that is individually specified. There are different types of lighting systems that give off different light intensities. The lighting guide states that a typical office space would need 500 lux (illuminance) for building users to take on paper-based or mixed tasks comfortably and 300 lux for any screen-based work. (Ruffles, 2005) Figure 2 shows the required amounts of light need for building user to work within different types of offices spaces, taken from the office lighting guide. The figures suggest that each typical office space would need 300 lux for screen based tasks, normal meetings and reception administrative tasks and 500 lux for more intense tasks such as paper-based, reading documents and writing. In a more deep-plan area the office space is required to have 500-750 lux throughout to perform multiple tasks comfortably. This is due to the fact that deep-plan areas are more towards the middle of office spaces or more than six meters away from windows; they would require a more constant flow of artificial light. This is where LED lighting may be at best because of the amount of electricity LED lighting systems take are very minimal and could deliver the required amount of light depending and the type of fixture. In normal deep-plan areas artificial lighting systems are on for longer periods because natural lighting coming in from windows would not penetrate throughout the office spaces. The corporation Philips suggests that a higher powered LED light would deliver up to 220 lumens. This type of LED would typically consume four watts. A typical deep-plan office space would require three high powered LED lights to deliver a comfortable amount of light for a user to perform various tasks, which would still consume less electricity compared to other office lighting systems. 2.4: Types of lighting There are many types of lamps that are currently used in different environments. These lamps include the incandescent lamp, compact fluorescent lamp, fluorescent lamp, halogen lamp, metal halide lamp and light emitting diodes. Incandescent lamps An incandescent lamp is a glass (See figure 3) bulb containing a thin filament. A current is passed through the filament, which heats up the filament until light is produced. (Philips, 2000 pp.49-50) stated The earliest filament lamps as developed by Swan in the United Kingdom and Edison in the United States had a short life of only 150 hours and a low efficiency of 2.5 lumens per watt, but they were thought of as a magic light source to replace gaslight. Filament lamps were clean, had greater flexibility, better colour and, with the development of available sources of power, better long-term economics. Now, a century later, the light bulb is still the preferred lamp for domestic use due to its cheap cost. Phillips (2000) continues to state that The life of a filament lamp depends upon its light output, with a greater output giving a shorter life. A life of 1000 hours with a light output of 12/14 lumens per watt was established as being a reasonable compromise and one which has stood the test of time. (Bean, 2007 pp. 139) explains that a compact fluorescent lamp is the introduction of smaller diameter tubes using high efficiency triphosphors bought with it the posibility of folding the tubes to produce compact single ended lamps. A 12W compact fluorescent lamp gives the same output as a 60W tungsten GLS lamp. Fluorescent Lamps (Fielder, 2005 pp. 28) states that Fluorescent lamps are built using a tubular glass envelope coated on the inside with a mix of phosphors. Inert Gas and a small amount of mercury is introduced into the tube to provide the atoms for photoluminescence. the tube is slightly pressurized, and the ends of the tube are capped with electrodes, which contain a cathode to generate and arc. Fluorescent lamps are 8 times more efficient than incandescent lamps and have a long life span, but fluorescent lamps contain mercury shown in figure 5. Mercury in lamps is harmful for the environment if not disposed of appropriately. Halogen Lamps The Interior Lighting for Designers book articulates that The tungsten-halogen   (or halogen)   lamp is an incandescent lamp with a selected gas of the halogen family sealed into it. As the lamp burns, the halogen gas combines with tungsten molecules that sputter off the filament and deposits the tungsten back on the filament   (Gordon, 2003 pp. 73). Figure 6 below shows an example of what a typical halogen lamp looks like. Metal Halide Lamps Metal halide lamps produce white light of a good colour quality and are available in many sizes, from compact lamps that can be used in track lighting and table lamps to huge lamps for lighting stadiums. Standard metal halide lamps tend to have a colour temperature of 3700 to 4100K and appear cool and slightly greenish. Their CRI is 65 to 70. Standard metal halide lamps typically are used where colour is not critical, such as sports arenas, parking lots, landscape lighting, and building floodlighting. (Benya, 2004 pp. 9-10) Light Emitting Diodes (LEDs) An LED is a semiconductor device that emits light when a voltage is surged through the semiconductor.   LED solid-state lighting is becoming more in use because of the energy saving benefits and long term costs. The main types of light bulbs used in offices are fluorescent lamps, incandescent tungsten filament (halogen lamps) and metal halide lamps. Fluorescent lamps are the main types of light sources used in offing lighting; the table states that the fluorescent tubes has a lamp efficiency of 32-86 Lm/W (Lumens per watt) this has a higher efficiency compared to incandescent tungsten filament lamp which have an efficiency of 7-14 Lm/W. Also fluorescent lamps can last more than ten times longer than incandescent tungsten filament lamps, but the tungsten filament lamps has a colour rendering index of 99 which means that the light intensity is much higher and would provide light that is closer to natural daylight compared to fluorescent lamps. Tungsten lamps are mainly used for executive offices to give an office a more professional looking environment. Metal halide lamps are used for desk lamp for more detailed important task where more light may be required for analytical reading and writing /complex drawing tasks. 2.5: LED technology LED technology is a fast growing lamp replacement solution in the lighting industry. LEDs contain semiconductors which are atoms of arsenic, phosphorus, germanium or other elements found in the periodic table. When electricity passes through the semiconductor visible light is emitted. Placing a number of LEDS side by side increases the increases the strength of the brightness. LED lights are also dimmable so the user could control the light intensity in a given area. The advantages of using LEDS are that they have a 50,000 to 100,000 hour life span, they consume very little electricity, they instantly light up, LED lights do not emit UV rays, they are durable to   vibrations they do not contain any mercury and LED emits light from any part of the light spectrum. The disadvantages of using LED lighting are that light is distributed directly instead of evenly compared to incandescent and fluorescent bulbs; it is very expensive to buy LED lights, they could cause light pollution in an environment because LEDs produce a lot of white light and LEDs are sensitive to heat. LED lighting is still currently being researched today to find out better methods to utilise the light from LEDs. An article from The Independent newspaper states The Indian government hopes to remedy this situation, which affects 112,000 rural villages across the country, over the next decade. The solution is a combination of light-emitting diodes (LEDs) and solar power. The former are more efficient than light bulbs the power required to light one conventional 100W bulb can now light an entire village and the latter allows electricity to be stored in batteries and provides lighting where there is no grid supply. Both LEDs and solar panels can also take the rough and tumble of village life: having few moving parts, they are very durable. (Independent, 2006) It is evident to see from this statement that the progress of utilising light from LEDs is positive; however this is not something that can be generalised to a greater population at this current time due to economics. A journal published from the Philips Research Centre shows an experiment on LED light sources and modelling for practical control systems for LEDs. (Subramanian Muthu, 2002) states The recent improvements in high-power light emitting diodes (LED) technology with 100+ lumens per LED chip and efficacy exceeding that of incandescent lamps brings the solid-state lighting close to a reality. An LED light source made of Red, Green and Blue (RGB) LEDs can provide a compact light source with unique features such as instant colour variability. In this paper, we highlight the issues that introduce the variability in the colour point and present feedback control schemes to overcome these problems. (Subramanian Muthu, 2002) The journal concluded with: RGB-LEDs have enormous potential in lighting applications. The major issue to be resolved is control and maintenance of the white point. This issue arises from the variation in LED wavelength and lumen output with temperature, drive current and time. Further complications arise due to the wide spread in the performance parameters of nominally identical LEDs. In this paper we have presented solutions to these issues using electronic feedback control of the light output of the LEDs. (Subramanian Muthu, 2002) A journal on Fundamental Analysis for Visible-Light Communication System Using LED Lights states LED is more advantageous than the existing incandescent in terms of life expectancy, high tolerance to humidity, low power consumption, and minimal heat generation lighting Our group has proposed and optical wireless communication system that employs white LEDs for indoors wireless networks (8)-(11). (Nakagawa, 2004) The journal concludes In visible-light communication system, the LED lights are distributed within a room and the irradiance of light is wide for function of lighting equipment. Therefore, the intersymbol interference depended on the data rate and the FOW of receiver.   (Nakagawa, 2004) A technical report on Energy Savings Estimates of Light Emitting Diodes in Niche Lighting Applications from the U.S. Department of energy focuses on the energy performance of LED lighting systems within different sectors such as, residential lighting, traffic lighting, retail lighting and office under shelf lighting. the document states that A type of task lighting, LED office undershelf lighting systems have been introduced on the market as replacements for T12 and T8 fluorescent products used in the commercial offices. LED office undershelf lights have the potential to save 1.37 TWh/yr if the entire market shifted to 2007 LED technology, equal to 14.8 TBtu/yr of primary energy consumption. This amounts to about 20% of the annual consumption of one large (1000 MW) electric power plant or the annual electricity consumption of one hundred thousand U.S. households.(U.S. Department of Energy, 2008 pp. 50) The report also states that fluorescent lamps, T8s, and T12s are the types of lamps that are commonly used in an office environment. These fluorescent lighting systems have a fixture efficiency of less than 40%.   This follows on to the average number of hours artificial lights operate for. Office undershelf lighting systems operate for an average of 2000 hours per year, amounting to about 5.5 hours per day or 8 hours per work day. (U.S. Department of Energy, 2008 pp. 51) This would bring on maintenance costs for the building owner due to bulb replacements. The life span of LED lighting systems is far greater than fluorescent lamps, which in turn would reduce regular maintenance. The annual energy comsuption for 53 million office undershelf lighting systems consume 3.43 TWh/yr of electricity in the U.S. At the moment LED lighting systems are still new to the market and have not penetrated the market enough to calculate the actual energy savings; however LED lighting systems have the potential to save 1.37 TWh/yr of electricity if LED lights completely replaced fluorescent lighting systems. (U.S. Department of Energy, 2008 pp. 52) (DiLouie, 2006) Points that LEDs are solid state devices that produce light by passing a current through semiconductor chips which are housed in a reflector, which is Development of Sustainable LED Lighting for Offices Development of Sustainable LED Lighting for Offices CHAPTER 1 INTRODUCTION 1.1: Study Background Climate change is rapidly increasing in our environment due to an increase in gases such as carbon dioxide and methane produced by humans and animals in the Earths atmosphere. As humans we have a moral responsibility to control and save the environment. The built environment is one of the major impacts towards greenhouse gas emissions. Designers are now pressured to design sustainable buildings that have less impact on emissions that damage the environment. The term sustainability means to save natural resources for future generations. Many buildings indirectly use resources such as fossil fuels which are converted into energy. Lighting systems in buildings consume some of this energy. Lighting accounts for around 15% of the energy bill in most homes, and around 25% in commercial buildings. It is supplied by electrical power plants using fossil fuels, and is responsible for a significant percentage of carbon dioxide emissions (Marshall 2009) To help combat how we as consumers use electric lighting an alternative can be achieved via sustainable lighting. Sustainable lighting can be defined as, Lighting that meets the qualitative needs of the visual environment with the least impact on the physical environment. (Service Lamp Corp. 2001) Light is an electromagnetic radiation, which means it is partially electric, magnetic and radiates.   Light starts off from atoms (electrons that orbit the nucleus). When energy is absorbed by an atom the electrons shift up to a bigger orbit. When the atom loses the energy the electrons shift back down to the original orbit, while the electrons shift back down they emit light in the form of electromagnetic radiation. (Sarlina 2009) This document will review material on lighting systems in the office environment. The document will start with a brief history of the light bulb and then go on to how humans interpret light. The document will discuss how LED technology would be utilised more in offices and discuss the importance of migrating to LED lighting systems in offices for a more sustainable environment. The thesis will include three known case studies on LED lighting installed in offices to gather and compare data in order to evaluate how LED lighting would suffice in real life environments. 1.2: Brief History The history of modern lighting starts off with the invention of the arc light in 1810 by Humphrey Davy. This worked by connecting a battery to a strip of charcoal using two wires. The strip of charcoal was charge with electricity and glowed. (Jacks 2003) In 1820 Warren De La Rue used a piece of platinum placed inside a tube.   A current was passed through the tube and the platinum lit well but the bulb did not go into production because platinum was very expensive. (Jacks 2003) A chemist and physicist Joseph Wilson Swan produced a workable electric light in 1860 which he patented as an incandescent light bulb with a filament made from carbonised paper within a partial vacuum. J. W. Swan improved on the invention in 1875 he changed the filament to a compressed and carbonised fibrous cotton thread filament. (Jacks 2003) An inventor called Thomas Alva Edison bought Josephs Swans patent from a company who owned the patent.   Thomas Edison worked on the light bulb to increase the life span. In 1880 Thomas Edison invented his Bamboo fibre filament lamp which lasted for 1200-1500 hours. (Jacks 2003) In 1903 Willis Whitnew invented the tungsten filament lamp (commonly used today). The tungsten lamp had a carbon filament with a metal-coating. This stopped the problem with the bulb turning dark as Thomas Edisons bulb did. (Jacks 2003) Technology today has advanced to new methods of lighting. Light emitting diode (LED) technology is now at the centre point of attention as LED lighting has many advantages with being very energy efficient, long lasting and produces less heat compared to standard incandescent or halogen bulbs. 1.3: Dissertation Structure The dissertation is divided into a sequel of five chapters. The first chapter focuses on climate change and the need to for a more sustainable built environment, a brief history into the light bulb, aims and objectives of this dissertation and the logic behind the dissertation. Chapter two is a detailed literature review which focuses on the effects of lighting on building occupants followed by government legislation, then comparing different types of lighting and leading onto research on LED technology. The information gathered is sourced from websites, government documents, books and scientific journals. Chapter three follows on from the literature review. This chapter focuses on the structure for the dissertation; firstly explaining the reason for using a literature review and then drawing on three major case studies have been chosen and all cases deal with LED lighting systems within office spaces. From the case studies the author has analysed and interpreted information.   The primary data gathered will be in the form of a qualitative questionnaire sent to lighting experts (via email) who have been involved with the case studies. The Answers have been analysed and compared to get a wide knowledge from accredited professional opinions. The fourth chapter researches into the three chosen case studies, all case studies are analysed and compared to give an overview of how effective having an LED lighting system is in an office environment. The fifth chapter discusses the results gathered from the findings. This would give an overview to the dissertation and show the key findings into answering the key questions. The final chapter will draw up conclusions as to the impact of LED lighting in office environments. The chapter addresses the original research question in the context of the findings and provides final conclusions on LED lighting and making use appropriate references where necessary. 1.4: Aim and Objectives The author has chosen sustainable LED lighting as the subject area in this dissertation. The question the author would like to propose will be: Why arent there enough office buildings using LED lighting systems? Also what effects do LED lighting have on users working in an office environment; would LEDs be beneficial for health and comfort on a psychological basis? To address the question the author will explore this main aim: The aim of this study is to research into the sustainability of LED lighting systems and how lighting can affect building users within an office environment. The author will aim analyse case studies on LED lighting systems in offices. What are the advantages and disadvantages? How would an LED lighting system be best suited for the office environment in terms of efficiency, comfort, reliability and short long term costs? The author will interview people from case studies drawn to gather primary qualitative information to reach a final conclusion. The actions the author will take to help answer the research question are listed below: Literature review, take into account of the building regulations, effects of artificial lighting on building occupants, types of artificial lighting and researching into books, case studies, reports, journals and websites related to LED lighting and other sustainable lighting systems. Research case studies on LED lighting systems that have been installed in offices. This would give the author an insight on how LED lighting systems have been successful in a real life environment. Interview researchers from case studies. Ask questions about how LEDs are designed to fit in a working office environment. Any issues that have occurred within the buildings. 1.5: Hypothesis In the United Kingdom there are very few offices if any that use an LED lighting systems to light up an office space. This could be due to lack of awareness, economic climate, social environment and lack of technology available to solve prob lematic conditions. 1.6: Key questions 1. How does light effect building users in terms of health? 2. How would LED lighting benefit offices and the environment? 3. Why isnt there many offices using LED lighting systems? 4. What is the current market like for LED lighting? Would there be a future for more LED lighting in offices? CHAPTER 2 LITERATURE REVIEW 2.1: Introduction This chapter researches into the effects of lighting on buildings occupants, legislation, different types of lighting and LED technology in detail. The aim for this literature review is to obtain information on how light is transcribed in the circadian system and the effects of light on human health. Legislation is a key issue for lighting. it regulate on the amount of light required for the appropriate tasks usually attained in different buildings, by learning legislation it would give the author an understanding into what requirements an office would need for good lighting. All information collated are from secondary and tertiary sources; for this literature review the information is found in books, journals, web pages, and government documents. 2.2: Effects of lighting on building occupants Lighting affects all building occupants on the way they perform tasks. There are different levels of lighting in different environment; the colour of light used in offices would tend to have a blue-white colour to promote concentration and light used in public areas would be a warmer yellow colour so building occupants would feel more relaxed in this type of environment. Too much light can cause health problems such as increased stress levels, headaches and higher blood pressure to the building occupant. (H.E.S.E, 2009) (Boyce, 2003 pp. 160) stated that Most apparently visual tasks have three components; visual, cognitive, and motor. Every task is unique in its balance between these components and hence in the effect lighting conditions have on task performance. (Boyce, 2003 pp. 160) also stated that Lighting conditions can affect task performance throught three systems, the visual system, the circadian system, and the perceptual system. the impact   of lighting conditions on the visual system and hence on visual performance is determined by the size, luminance contrast, and colour difference of the task and the amount, spectrum, distrbution of the lighting. The point that   (Boyce, 2003) makes is that light sent to the visual system affects the performance of the information relayed in the brain.   (Cuttle, 2008 pp. 5-6) stated The optical system of the human eye focuses an inverted image onto the retina, shown in Figure 1. This image is constantly changing with movements of the head and the scanning movements of the eyes. It is often said that the eye is like a camera, but the only similarity is that it forms a focused image in which, for every pixel, there is a corresponding element in the luminous environment. The distribution of luminance and colour that comprises the retinal image is modified by light losses that occur in the optical media of the eye, and these losses are not constant as they increase significantly with age. (Cuttle, 2008) Both books express points about how light is interpreted in the human brain differently but they both correlate how light can affect a building occupant. They both state how light is interpreted in the visual system. A research journal on Light Much More Than Vision written by Mark. S. Rea (Ph.D.) Discuses how lighting can affect the circadian system in building occupants. The journal questions if offices, school and homes are providing good lighting practises. The journal begins with an abstract on the impact of light on the circadian system The amount of light, its spectral composition, spatial distribution, timing and duration needed for vision is so different from that needed for circadian functioning, that generalizations about good lighting will have to be assessed by two very different sets of criteria in the future. (Mark. S. Rea, 2007) The journal continues on how light is interpreted in the human circadian system Light is presently and formally defined as optical radiation entering the eye that provides visual sensation. An international system of photometry has been developed and institutionalized to quantify, measure and communicate the properties of light as it affects the human vision. (Mark. S. Rea, 2007) This statement explains how light is communicated in human vision.   Practical sources of light allow humans to read material, move around spaces, drive cars, create social interaction between other users and allow user to do other activities. Under spatial distribution the journal states Through optical refraction by the cornea and lens in the eye and by neural-optical enhancements by in the retina, the spatial distribution of objects and textures in the environment can be processed by the visual system. Arguably accurate rendering of the spatial distribution of light in our environment by our retina is essential to our survival because   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   patterns of light and dark provide information needed by the visual system (Mark. S. Rea, 2007) The journal concludes with So, Are we providing healthy light in our offices, schools and homes? Probably the answer is No, we are not. Certainly we are not providing or specifiying the ideal lighting technologies and applications for the circadian regluation (Mark. S. Rea, 2007). This would bring on the question as to wether LED lighting would provide the answer to good lighting. LED has been evolving for years, they have been specifically modified to provide comfortable lighting levels for which a user could carry out certain visual functions. 2.3: Legislation The Kyoto agreement is a protocol made by the United Nations Framework Convention on Climate change. This main aim of the protocol is to stabilise greenhouse gas emissions. There are four greenhouse gases that the protocol focuses on (carbon dioxide, nitrous oxide, methane, sulphur hexafluoride). The United Kingdom Government is legally tied to the Kyoto agreement and has set out targets to meet emission rates. A document on The Kyoto Protocol by British-Energy states The UKs commitment under the protocol is for a reduction in greenhouse gas emissions of 12.5% from 1990 levels by 2008-2012. This implies an 8% reduction in CO2 emissions over this time period. The UK government also has an aspirational target for itself of a 20% reduction of CO2 emissions by 2010, demonstrating the importance of this issue for the current government.(British Energy, 2009) Offices contribute towards the CO2 emissions given off around the planet. A lot of the energy used in offices is mainly caused by office lighting. The new advancements in LED lighting could reduce the amount of energy used because LED lighting is the most sustainable type of artificial lighting. This could help aid the efforts of the Kyoto Protocol and help meets emission targets. Approved Documents Part L of the building regulations is split up into four documents. Part L1A and L1B focuses on conservation of fuel and power in domestic buildings, part L2A and L2B focuses on conservation of fuel and power in non domestic buildings. As of 6th April 2006 the revised Building Regulations Part L Conservation of Fuel and Power came into effect. The updated regulations would improve energy standards by 40 percent from that of the 2002 Building Regulations (ODPM, 2006). There are four approved documents published by the Office of the Deputy Prime Minister (ODPM, 2006): Approved Document L1A: Conservation of fuel and power (New dwellings) (2006 edition) Approved Document L1B: Conservation of fuel and power (Existing dwellings) (2006 edition) Approved Document L2A: Conservation of fuel and power (New buildings other than dwellings) (2006 edition) Approved Document L2B: Conservation of fuel and power (Existing buildings other than dwellings) (2006 edition) L1 Domestic buildings Conservation of fuel and power in dwellings. Limiting heat loss through fabric of dwelling from hot water pipes used for space heating. Limiting heat loss through hot water vessels and service pipes. Use control systems on space heating and hot water systems so that energy can be used efficiently. Use control systems on lighting systems so that energy can be used efficiently. L2 Buildings other than dwellings Conservation of fuel and power in non domestic buildings. Limiting heat loss through fabric of dwelling from hot water pipes used for space heating. Limiting heat loss through hot water vessels and service pipes. Use control systems on space heating and hot water systems so that energy can be used efficiently. Providing lighting systems with sufficient controls so that energy can be used efficiently. Limiting exposure to solar heat gains. Use control systems on air conditioning and mechanical ventilation systems so that energy can be used efficiently. Commissioning the building engineering services so that they make efficient use of energy and recording their performance. Approved Document L2A: Conservation of fuel and power highlights what is required for lighting efficiency in offices, industrial and storage areas in all building types. The document states For the purposes of this Approved Document, office areas include those spaces that involve predominantly desk-based tasks, including classrooms, seminar rooms and conference rooms, including those in schools. Reasonable provision would be to provide lighting with an average initial efficiency of not less than 45 luminaire-lumens/circuit-Watt as averaged over the whole area of these types of space in the building. (ODPM, 2006 pp. 19) LED lighting has the potential to excel past the average guide for initial efficiency of 45 lumens per watt. A breakthrough from the lighting company CREE states LED efficacy test results that set a new benchmark for the LED industry. Cree reported results of 131 lumens per watt white LED efficacy, confirmed by the National Institute of Standards and Technology in Gaithersburg, Maryland. Tests were performed using prototype white LEDs with Cree EZBrightâ„ ¢ LED chips. (CREE Inc, 2009) The CIBSE Lighting Guide 7: Office Lighting gives a guidance of how to layout lighting systems within an office to give the maximum efficiency of lighting and how much light is required for different types of office spaces. The guide states There are many ways to light an office space: with direct light down from above, from indirect light bounced from the ceiling, or from a combination of both. Many factors will dictate or influence the choice of which technique to use.   (Ruffles, 2005 pp. 7) There are many different building types and each office would need a lighting system that is individually specified. There are different types of lighting systems that give off different light intensities. The lighting guide states that a typical office space would need 500 lux (illuminance) for building users to take on paper-based or mixed tasks comfortably and 300 lux for any screen-based work. (Ruffles, 2005) Figure 2 shows the required amounts of light need for building user to work within different types of offices spaces, taken from the office lighting guide. The figures suggest that each typical office space would need 300 lux for screen based tasks, normal meetings and reception administrative tasks and 500 lux for more intense tasks such as paper-based, reading documents and writing. In a more deep-plan area the office space is required to have 500-750 lux throughout to perform multiple tasks comfortably. This is due to the fact that deep-plan areas are more towards the middle of office spaces or more than six meters away from windows; they would require a more constant flow of artificial light. This is where LED lighting may be at best because of the amount of electricity LED lighting systems take are very minimal and could deliver the required amount of light depending and the type of fixture. In normal deep-plan areas artificial lighting systems are on for longer periods because natural lighting coming in from windows would not penetrate throughout the office spaces. The corporation Philips suggests that a higher powered LED light would deliver up to 220 lumens. This type of LED would typically consume four watts. A typical deep-plan office space would require three high powered LED lights to deliver a comfortable amount of light for a user to perform various tasks, which would still consume less electricity compared to other office lighting systems. 2.4: Types of lighting There are many types of lamps that are currently used in different environments. These lamps include the incandescent lamp, compact fluorescent lamp, fluorescent lamp, halogen lamp, metal halide lamp and light emitting diodes. Incandescent lamps An incandescent lamp is a glass (See figure 3) bulb containing a thin filament. A current is passed through the filament, which heats up the filament until light is produced. (Philips, 2000 pp.49-50) stated The earliest filament lamps as developed by Swan in the United Kingdom and Edison in the United States had a short life of only 150 hours and a low efficiency of 2.5 lumens per watt, but they were thought of as a magic light source to replace gaslight. Filament lamps were clean, had greater flexibility, better colour and, with the development of available sources of power, better long-term economics. Now, a century later, the light bulb is still the preferred lamp for domestic use due to its cheap cost. Phillips (2000) continues to state that The life of a filament lamp depends upon its light output, with a greater output giving a shorter life. A life of 1000 hours with a light output of 12/14 lumens per watt was established as being a reasonable compromise and one which has stood the test of time. (Bean, 2007 pp. 139) explains that a compact fluorescent lamp is the introduction of smaller diameter tubes using high efficiency triphosphors bought with it the posibility of folding the tubes to produce compact single ended lamps. A 12W compact fluorescent lamp gives the same output as a 60W tungsten GLS lamp. Fluorescent Lamps (Fielder, 2005 pp. 28) states that Fluorescent lamps are built using a tubular glass envelope coated on the inside with a mix of phosphors. Inert Gas and a small amount of mercury is introduced into the tube to provide the atoms for photoluminescence. the tube is slightly pressurized, and the ends of the tube are capped with electrodes, which contain a cathode to generate and arc. Fluorescent lamps are 8 times more efficient than incandescent lamps and have a long life span, but fluorescent lamps contain mercury shown in figure 5. Mercury in lamps is harmful for the environment if not disposed of appropriately. Halogen Lamps The Interior Lighting for Designers book articulates that The tungsten-halogen   (or halogen)   lamp is an incandescent lamp with a selected gas of the halogen family sealed into it. As the lamp burns, the halogen gas combines with tungsten molecules that sputter off the filament and deposits the tungsten back on the filament   (Gordon, 2003 pp. 73). Figure 6 below shows an example of what a typical halogen lamp looks like. Metal Halide Lamps Metal halide lamps produce white light of a good colour quality and are available in many sizes, from compact lamps that can be used in track lighting and table lamps to huge lamps for lighting stadiums. Standard metal halide lamps tend to have a colour temperature of 3700 to 4100K and appear cool and slightly greenish. Their CRI is 65 to 70. Standard metal halide lamps typically are used where colour is not critical, such as sports arenas, parking lots, landscape lighting, and building floodlighting. (Benya, 2004 pp. 9-10) Light Emitting Diodes (LEDs) An LED is a semiconductor device that emits light when a voltage is surged through the semiconductor.   LED solid-state lighting is becoming more in use because of the energy saving benefits and long term costs. The main types of light bulbs used in offices are fluorescent lamps, incandescent tungsten filament (halogen lamps) and metal halide lamps. Fluorescent lamps are the main types of light sources used in offing lighting; the table states that the fluorescent tubes has a lamp efficiency of 32-86 Lm/W (Lumens per watt) this has a higher efficiency compared to incandescent tungsten filament lamp which have an efficiency of 7-14 Lm/W. Also fluorescent lamps can last more than ten times longer than incandescent tungsten filament lamps, but the tungsten filament lamps has a colour rendering index of 99 which means that the light intensity is much higher and would provide light that is closer to natural daylight compared to fluorescent lamps. Tungsten lamps are mainly used for executive offices to give an office a more professional looking environment. Metal halide lamps are used for desk lamp for more detailed important task where more light may be required for analytical reading and writing /complex drawing tasks. 2.5: LED technology LED technology is a fast growing lamp replacement solution in the lighting industry. LEDs contain semiconductors which are atoms of arsenic, phosphorus, germanium or other elements found in the periodic table. When electricity passes through the semiconductor visible light is emitted. Placing a number of LEDS side by side increases the increases the strength of the brightness. LED lights are also dimmable so the user could control the light intensity in a given area. The advantages of using LEDS are that they have a 50,000 to 100,000 hour life span, they consume very little electricity, they instantly light up, LED lights do not emit UV rays, they are durable to   vibrations they do not contain any mercury and LED emits light from any part of the light spectrum. The disadvantages of using LED lighting are that light is distributed directly instead of evenly compared to incandescent and fluorescent bulbs; it is very expensive to buy LED lights, they could cause light pollution in an environment because LEDs produce a lot of white light and LEDs are sensitive to heat. LED lighting is still currently being researched today to find out better methods to utilise the light from LEDs. An article from The Independent newspaper states The Indian government hopes to remedy this situation, which affects 112,000 rural villages across the country, over the next decade. The solution is a combination of light-emitting diodes (LEDs) and solar power. The former are more efficient than light bulbs the power required to light one conventional 100W bulb can now light an entire village and the latter allows electricity to be stored in batteries and provides lighting where there is no grid supply. Both LEDs and solar panels can also take the rough and tumble of village life: having few moving parts, they are very durable. (Independent, 2006) It is evident to see from this statement that the progress of utilising light from LEDs is positive; however this is not something that can be generalised to a greater population at this current time due to economics. A journal published from the Philips Research Centre shows an experiment on LED light sources and modelling for practical control systems for LEDs. (Subramanian Muthu, 2002) states The recent improvements in high-power light emitting diodes (LED) technology with 100+ lumens per LED chip and efficacy exceeding that of incandescent lamps brings the solid-state lighting close to a reality. An LED light source made of Red, Green and Blue (RGB) LEDs can provide a compact light source with unique features such as instant colour variability. In this paper, we highlight the issues that introduce the variability in the colour point and present feedback control schemes to overcome these problems. (Subramanian Muthu, 2002) The journal concluded with: RGB-LEDs have enormous potential in lighting applications. The major issue to be resolved is control and maintenance of the white point. This issue arises from the variation in LED wavelength and lumen output with temperature, drive current and time. Further complications arise due to the wide spread in the performance parameters of nominally identical LEDs. In this paper we have presented solutions to these issues using electronic feedback control of the light output of the LEDs. (Subramanian Muthu, 2002) A journal on Fundamental Analysis for Visible-Light Communication System Using LED Lights states LED is more advantageous than the existing incandescent in terms of life expectancy, high tolerance to humidity, low power consumption, and minimal heat generation lighting Our group has proposed and optical wireless communication system that employs white LEDs for indoors wireless networks (8)-(11). (Nakagawa, 2004) The journal concludes In visible-light communication system, the LED lights are distributed within a room and the irradiance of light is wide for function of lighting equipment. Therefore, the intersymbol interference depended on the data rate and the FOW of receiver.   (Nakagawa, 2004) A technical report on Energy Savings Estimates of Light Emitting Diodes in Niche Lighting Applications from the U.S. Department of energy focuses on the energy performance of LED lighting systems within different sectors such as, residential lighting, traffic lighting, retail lighting and office under shelf lighting. the document states that A type of task lighting, LED office undershelf lighting systems have been introduced on the market as replacements for T12 and T8 fluorescent products used in the commercial offices. LED office undershelf lights have the potential to save 1.37 TWh/yr if the entire market shifted to 2007 LED technology, equal to 14.8 TBtu/yr of primary energy consumption. This amounts to about 20% of the annual consumption of one large (1000 MW) electric power plant or the annual electricity consumption of one hundred thousand U.S. households.(U.S. Department of Energy, 2008 pp. 50) The report also states that fluorescent lamps, T8s, and T12s are the types of lamps that are commonly used in an office environment. These fluorescent lighting systems have a fixture efficiency of less than 40%.   This follows on to the average number of hours artificial lights operate for. Office undershelf lighting systems operate for an average of 2000 hours per year, amounting to about 5.5 hours per day or 8 hours per work day. (U.S. Department of Energy, 2008 pp. 51) This would bring on maintenance costs for the building owner due to bulb replacements. The life span of LED lighting systems is far greater than fluorescent lamps, which in turn would reduce regular maintenance. The annual energy comsuption for 53 million office undershelf lighting systems consume 3.43 TWh/yr of electricity in the U.S. At the moment LED lighting systems are still new to the market and have not penetrated the market enough to calculate the actual energy savings; however LED lighting systems have the potential to save 1.37 TWh/yr of electricity if LED lights completely replaced fluorescent lighting systems. (U.S. Department of Energy, 2008 pp. 52) (DiLouie, 2006) Points that LEDs are solid state devices that produce light by passing a current through semiconductor chips which are housed in a reflector, which is