Quantum in physics Coursework Example | Topics and Well Written Essays - 1000 words

Quantum in physics - Coursework Example (Belloni et al, 2005) Local density Approximation (LDA) Exchange correlation (XC) is the relationship between different electrons and the exchange of energy in the electronic setup of a particular quantum system. Further density functional theory (DFT) is study of an electronic structure when it is at its least excited state called the ground state or the zero-point energy of the system. Electron density is defined as the probability of an electron filling up a miniscule space around any particular point. It is denoted by n(r). (Computational Materials Science Group,1998) Local Density approximation can now be defined as an approximation of the exchange correlation in the Density functional theory or in other words the energy relationship between different electrons in an electronic structure at ground state. This can be found out using a function of the electron density at each spatial point. Further Homogeneous electron gas (HEG) is the interaction of positive atomic nuclei that ar e uniformly distributed in space with the negatively charged electrons that have a uniform density in the same space. Local Density approximations are thus most accurately derived when functional integrals are made on the HEG approximation. (Computational Materials Science Group,1998) For a unpolarized system the LDA can be written as ELDAXC=xc(n(r)n(r)dr Where n(r) is the electron density and ?xc is the exchange –correlation energy density. Exc can further be split up as Exc=Ex + Ec where Ex are the exchange functions and Ec is the correlation function.( Computational Materials Science Group,1998) The Perdew-Burke-Ernzerhof (PBE) The interpretation and evaluation of Density functional Theory (DFT) has made the calculation of systems at ground state very effective albeit with several drawbacks. The exchange correlation energy obtained was an approximate value using the LDA method. Further improvement resulted in the introduction of GGA’s or generalized gradient approxi mation to fine tune the LDA. Creating a functional without any empirical parameters the GGA were made to follow certain basic constraints. Since true electron density was actually non-homogenous, it was proposed in 1980 to enhance the density n(r) at a particular point r with inputs regarding the gradient of electron density. To derive an accurate value of the DFT a higher functional satisfying several parameters is ideally chosen. The PBE functional is an ideal functional proposed by Perdew, Burke, Ernzerhof in 1996. Experiments conducted thereafter have proved that the values obtained using these GGA’s were in accordance with those obtained using numerical tests.( Evarestiv R.A, 2007) This PBC functional can be defined as a summation of two derivatives, the XC hole and the energy derivative. This functional is constructed on the premise that the constraints of a particular hole are known and the exchange correlation hole is defined per these constraints. ELSDXC[na, nb]=? d3 rn(r)[?x(n(r))f(?, r) + ?c(rs(r), ?(r))] Where ?=(na-nb)/ (na+nb) is the relative spin polarization and f(?)=1/2[(1+?)4/3 +(1-?)4/3] The exchange energy ?x per electron depends on rs=[3n/4Ð »]1/3 and correlation energy ?c depends on rs and ?.( Evarestiv R.A, 2007) The exchange PBE functional is written as a combination of Ex and Ec. Here the exchange PBE functional EPBEX(n)=?d3rn?x(n)Fx(s) With Fx(s) =1+k-k/(1+ µs2/k) , here k=0.804 and  µ=021951 EPBEC[na, nb]=? d3rn[?C(rs,?)+ H(rs,?,t] where H=? ?3 ln

A comparison between the Japanese kimono and Chinese robe Research Paper

A comparison between the Japanese kimono and Chinese robe - Research Paper Example Dress materials and designs are the best indicators of the history of a particular region. It holds absolutely true when we say that by looking at the texture, designs, pattern and also the color of the dress material that was worn, one could easily decipher the culture of the people who wore it and also get to the know their way of life in general. Japanese kimono and Chinese robes have been brought into comparison as they resemble each other to a very great extent. There seems to be a cultural link between that of Japan and China which could be deciphered from their clothing. Japanese kimono and Chinese robes looks similar yet comes with their own uniqueness.The kimono came into being in the fifth century. A kimono robe is the typical sign of the Asian cultures. The garment has its long history entrenched in the hearts of the Japanese and Chinese culture. Later, the garment was made more contemporary to include kimono robes that are fundamentally all one size for both men and women . While silk kimonos are traditional garments in Japan, Chinese have Cheongsam as their traditional Chinese garment (Garrett, 1998). Both of these garments are very old and carry with it a long lost historical angle to it. Kimono, a piece of clothing, is not just a form of dressing among the Japanese but is also a clear-cut manifestation of how the Japanese history has evolved over time. The style of Kimono has been altered from one age to that of another and it has undergone changes throughout its history and has finally attained a form today. Goldstein-Gidoni (1997, p. 35) comments â€Å"The word kimono used in contemporary Japanese refers to the modern kimono, which â€Å"stems from the decorative festive clothing worn on special occasions† The inception time of the Kimono dates back to the time in Japan history pointed out as a specific period. That specific period is the Jomon period (Said, 1995). Kimono was in the form of a piece of clothing that was loosely draped ove r the body of the wearer. Those times, people did not pay much of attention to clothing as their major activity was to go for hunt and assembling. It was between the year 300 and 550 AD, Kimono dress patterns went for a change. Now the influence of the Chinese culture over the Japanese can be seen and the Kimono dress became a two-piece cloth. The arrival and the settlement of the Chinese in Japan brought about a huge change in their dressing patterns. Kimono was made in white color that was taken from the silk worm. Figure 2: Chinese White Women’

John Wycliff's contribtions to the christian religion Term Paper

John Wycliff's contribtions to the christian religion - Term Paper Example Other individuals believed in giving out offerings so that they can receive forgiveness for their sins (McDonald 139). John Wycliffe acquired his college education at Morten College at Oxford, which acted as a fundamental tool in his career. This is becoming a significant and reputable icon towards building Christian faith. During Wycliffe’s time, the church had a dominant force in almost all areas of life. The church utilized its power to exploit fellow Christians in a variety of ways. For instance, Christians were to pay for their sins whereby mode of payment was money or gifts meant for the ministers (Phillips 26). Most people were in bondage of the church and its sacraments based on how it expressed and ensured its power manipulated Christians. This prompted Wycliffe turned out to be the then fearless critical of the church’s abuse of power (Davis 98). Hence, becoming popular due to his stern stand and criticism on the church though he based his arguments on the word. The then secular government was an example of a reputable organization that boosted and sided with him in its quest to reveal how the church had become and taken advantage of its congregation’s ignorance. Government’s support was in form of preventing the church from directly condemning the emergent critic whose arguments were justifiable besides the church some of the dealings being unbiblical. Wycliffe was also a significant workforce in the reformation of the church. During his time, the church seemed own a large area of England besides having an unconquerable influence (Lavinsky). Instances of corruption characterized the mainstream church more so the clergy taking advantage of the ignorant faithful. In addition, the clergy contrary to what their vows stated proved to be immoral besides sometimes allowed to pass certain stages without accomplishing the required measures, hence the church during then producing illiterate priests (McDonald

Allowabe size and configuration of sidewalk cafes in NYC Essay

Allowabe size and configuration of sidewalk cafes in NYC - Essay Example They have been instrumental in giving feasible solutions to idealized proposals of cultural entities and the government. Architects are instrumental in responding to the concerns of both the commercial entities and the public in giving an integrated policy (Loukaitou-Sideris & Ehrenfeucht, 2009). In addition, cultural forces have agitated for a traditional architectural setting whereby culture is integrated into daily activities. This calls for sidewalk spaces that can allow for setting of public emblems and interaction. On the other hand, commercial activities constrain the growth of culture in towns. Academics have complained of the sidewalk policy as ignoring the preferences of the public and consumers. It also ignores the concept of free markets whereby commercial activities control the space in which they operate in the same (McEachern, 2008). This criticism rides on the idea that the government and academics make assumptions of problems in the city. This ignores the feelings of the public of whom the changes are made for the same. This suggests that the public should push for proposals of improving their interests in the city. In this sense, the public pulls away the stake from the academics. Other critiques herald the policy as one-sided since it only concentrates on the public and constrains the growth of small businesses (Kleniewski & Thomas,

Digital camera Research Paper Example | Topics and Well Written Essays - 1000 words

Digital camera - Research Paper Example They all come in difference sizes, features and of course with price variations from two figures to four figures. It therefore becomes all the more necessary that we must go for a camera most suitable for our requirements. Some of the key features in modern day digital camera are; i. Resolution: i.e. a key determinant of picture quality. This indicates the number of pixels or picture elements that can be packed inside the picture. More the pixels clearer will be the picture, because that implies the picture can have more details in it. Now a days, we talk of megapixels i.e. million pixels. The number of megapixels also limits the size of the print that we can take from the picture. And if we try to enlarge the picture further, it becomes blurred or broken into squares. Some of the standard sizes for print are; ii. Types of Lens: The lens is another very important feature of the camera. In fact the lens happens to be the first thing that will create the picture. The lens could be made up of plastic or glass. The clarity of glass lens is much more than their plastic counterparts. Normally Carl Zeiss offers good quality glass lenses. But the cost of glass lenses becomes more. Another distinguishing feature for the lens is the zooming facility. A zoom lens we can take clearer pictures of distant objects. The zoom lens allows us to magnify or shrink the subject to include more area in the picture. The zoom comes in the form of 2X, 3X, 4X etc. As the zoom range goes up so does the price of the camera. In addition the digital camera comes with digital zoom as well, which is helpful for cropping up the picture. iii. Shutter Speed: We need to be more careful about this future while purchasing manual cameras, because the shutter speed determines the duration of the exposure time. The slower the shutter speed, the more will be the exposure. In this case the picture will be able to record more depth of the picture. But, if during the exposure time there’s some shake

Construction Health and Safety Essay Example | Topics and Well Written Essays - 1750 words

Construction Health and Safety - Essay Example Otherwise, any designer who may be engaged by a domestic client is obliged to comply with the rules. Construction works refer to construction alteration, upkeep, repair and maintenance, commissioning, renovation, decommissioning, redecoration, fitting-out, demolition or dismantling. It also includes site preparation, exploration and surveys. Failure to comply with the code is treated as evidence of breach of health and safety legislation by a court of law. The regulations cover the responsibilities of clients, the roles of principal contractors and sub-contractors, the roles of designers and planning supervisors (Griffiths and Griffiths, 2011). The CDM regulations help in the improvement of health and safety in construction industries. When these regulations are followed to the letter, a significant improvement is observed. Then, they ensure that the construction involves the right people at the right time. Risk management is done on time to reduce its vulnerability and possibility o f occurrence. The construction team is also able to focus on effective planning and practical management of risks. Every one in the controlling site work is charged with responsibilities of ensuring that work conditions are healthy and safe before work commences. They also ensure that the work to be done will not expose others into risk. The CDM 2007 places all those involved in construction work with legal duties commonly called duty holders. generally, the CDM regulations is aimed at facilitating, and enhancing the overall management and coordination of health, safety and welfare in the entire process of a construction project to reduce the rate of injuries and serious accidents that occur in the construction industry (Kogan Page Ltd, 2012). The Designers Response These are organisations or persons involved in preparing designs which involves drawing, designing detail, preparing specifications, creating bills of quantities, specifying articles and substances, analysing, calculatin g and preparing for the construction work. Designers include architects, structural engineers, building surveyors, mechanical and electronic engineers. The responses on whether the designers’ duties are appropriate, reasonable and proportionate attracted various responses. Recommendations stated that there should be more guidance in the regulations on a risk management hierarchy since they are under considerable economic pressure from clients to reduce the costs. Education was the key to improving designer understanding, especially on risk assessment issues, availability of funds for training on new designer principles in companies struggling to survive (Murdoch and Hughes, 2007). Half of the accidents could be avoided through better understanding of the relationship between design and construction. The duties however need to be more prescriptive to make them easier to follow. There should be also some responsibility on others who impact the design of the works like local pla nning departments and local authorities. Greater clarification is required on the definition of design work. Again, the designers need to start a project work after a coordinator has been appointed (Ramsey, 2007). The Resident Owner or Facilities Manager Response Facilities managers have been the main

Road Trauma Essay Example for Free

Road Trauma Essay Road Trauma; two little words, that pack an almighty punch into the lives and families of those affected by vehicle accidents. A definition by the Australian Academy of Science: â€Å"The word ‘trauma’ is especially appropriate to describe the injuries inflicted by road crashes. The medical profession uses it for any bodily injury or wound, but more literally it means ‘a powerful shock that may have long-lasting effects’ – an apt description for the sudden violence of a road crash†. (NOVA: Australian Academy of Science- Road Trauma Prevention). Trauma is the hidden tragedy of the road. We have become accustomed and almost numb to hearing about the devastatingly high death toll; although unpleasant, crash fatalities are becoming an increasing circumstance and an unwanted occurrence for today’s generations. â€Å"There is limited, to no physical control over that types of injuries may be inflicted upon a victim in a road crash: from ruptured spleens to severed limbs, broken skulls/ severe whiplash and injuries to the brain and spinal cord, and fractured ribs†- explains the team at Nova’s road trauma unit. see more:speech on importance of road safety The shocking truth about the outcomes of being in a near fatal car accident is that the recovery from these grievances can take years of treatment, physiotherapy, medications and therapy, but the physical and psychological pain may never go away for both the wounded and their loved ones. (NOVA: Australian Academy of Science- Road Trauma Prevention). â€Å"There are wounds that never show on the body that are deeper and more hurtful than anything that bleeds. † ? Laurell K. Hamilton, Mistrals Kiss Australia, the seventh largest continent in the world, is homed to over 20,434,176 people. Research suggests that every year on Australian roads approximately 1,600 fatalities, and over 50,000 injuries occur. These are astonishing numbers, much alike the statistics found by The Southern Australian Road Safety Strategy, which places road crashes as the second highest known killer of young people aged 16 to 25 years old. For every road death it is estimated that an average 1,700 people are killed in road crashes each year. The Journey Beyond Road Trauma: Classroom Resources). Road trauma does not only affect the emotional state of mind of those affected and their families; it also influences the members of both communities, both big and small. A problematic issue which requires appropriate financial necessities, with the cost of road trauma costing Queensland community tax payers a whopping excess of one billion dollars per year; the increasing number of drivers being killed each year has become a bourdon for the Queensland Government and overall Australian society. QLD Government: Police and Road Trauma Prevention Strategies). In accordance to the statistic that almost 1,700 people are killed on Australian roads each year, it is three times more likely for drivers aged between 16 to 25 years be seriously injured or killed in a car accident, leaving them at more risk than drivers above the age of 35, who are additionally more experienced, proficient, knowledgeable and qualified to abide by the road rules at all times. Another attributing motive towards the deaths of younger drivers on our roads is the fact that young drivers are 75% more likely to participate in risk taking behaviours on the roads. This compulsion and tendency to par take in risk taking comportments comes with the freedom and independence getting your licence. It is a common component of becoming a young adult, but for far too many reckless motorists, the desire results can lead to serious injuries and even death on the roads. (The South Australian Road Safety Strategy 2003-2010). The Fatal Five’ is a highly recommended set of guidelines created by the Northern Territory Police Force, to help recognise the causes of casualties, and hopefully reduce the accident toll on Australia’s roads. According to the Northern Territory Police Force, the varying causes of dangerous factors that can potentially increase the chance of being in a vehicle accident include: Speeding, drink and drug use while driving, failure to wear seatbelts/ restraints of any kind, fatigue, inattention, and poor road use behaviour/ amateurish knowledge of road rules. These five spectacles of endangerment are the reasons for almost 5,000 teens in the 16 to 20 age group being eradicated each year as a result of a car crash, and over 400,000 teenagers being injured in the same age group. Southern Australian Police illustrate the most potential causes of death, via the ‘Fatal Five’ system were driving while under the influence of alcohol and speeding. In 2010, out of the male population drivers aged 15 to 20 killed in car crashes, 38% were speeding and 24% were under the influence of alcohol. (The South Australian Road Safety Strategy 2003-2010), (Autos. om: Driving and Safety- Car Crash Statistics Based on Age and Location). A continuous exploitation and abuse of the five most dangerous factors on Australia’s roads can potentially affect anyone sharing the road with a participant of risk taking. This report aims to analyse the extent of road risk taking behaviours, evaluate the current measures in place to address road risk taking behaviour, and make helpful recommendations on additional resources and strategies that would minimise road trauma and the associated long term community health concerns. Queensland is Australia’s second largest state; covering 1, 77200 km’s, and the third most heavily populated, with more than 4. 5 million inhabited residents. Queensland’s desirable lifestyle ensures that its current population of over 4. 5 million continues to grow and prosper. Brisbane, the capital, is located in the south-eastern corner of the state. Queensland is often referred to as ‘The Sunshine State’, due to its warm weather and low rainfall all year round. Queensland has a growing economy that is based mainly on tourism, mining and agriculture. The Regions of Queensland refers to the environmental sub- dividers in which the state is apportioned amongst, due to its large size and highly distributed population for both numerical and administrative commitments. Each region differs somewhat in terms of its financial prudence, population, temperature, and geography. (Wikipedia: Queensland). The Wide Bay Burnett is regarded as one of roughly eleven regions, by The Queensland Government Office of Economic and Statistical Research. It is classified as the costal and hinterland areas between Caloundra and Gladstone, and is approximately between 107 and 400 kilometres north of Queensland’s capital city, Brisbane. According to The Australian Bureau of Statistics, the Wide Bay region is homed to 273,267 people; 134,783 males and 138,484 females, with a median age of 43. (Census: For a Brighter Future). This previous statistic evidences that this region as a whole, should have a safer road status due to its higher intermediate age group. This pleasant statement is doubted, since drivers and passengers between the ages of 16 and 25 are over-represented on the Wide Bay’s road toll, especially in 2007; while taking the number of young drivers into consideration (14% of the population), they represent 37% of passengers, and 28% of drivers killed. Also documented in 2007 was the 1,600 young drivers and passengers seriously injured on the Wide Bays roads. (Australian Bureau of Statistics: Leading Causes of Death in Queensland). These shocking figures are hard to comprehend until you recognize that this small farming region is homed to one of Australia’s most dangerous stretches of road: The Bruce Highway. The Bruce Highway, according to the ABC Wide Bay, stretches 1,550 kilometres along the Queensland coast, connecting Brisbane to the states north. This area of road is classified as a major danger spot for motorists by The Australian Automobile Association (AAA). (ABC Wide Bay: Road Toll Statistics). The Bruce Highway has become a detrimental health factor to not only the community inhabiting the Wide Bay, but also to its many visiting tourists, who are unfamiliar and inexperienced with the current road conditions, which according to Road Trauma. Com, â€Å"57% of fatal accidents are possibly caused by poor road conditions, which is the fourth highest cause in the top ten causes of car accidents in the Wide Bay region†. (Cars/ Road Trauma. Com). The ABC Wide Bay road toll also proved that â€Å"the Bruce Highway saw the highest level of road trauma on the Queensland national highway network, accounting for 50 per cent of casualty crashes and 61 per cent of deaths from 2005 to 2009†. (ABC Wide Bay: Road Toll Statistics). Road Trauma has become a foremost cause of death and indisposition amongst the Wide Bay community, with risk taking developing into an unnecessary reason for morality. This is contributing to the road trauma statistics and therefore is detrimental to the health of the community. (Census: For a Brighter Future).