Diffusion in aluminium alloys, Hot deformation (rolling) of aluminium Dissertation

Diffusion in aluminium alloys, Hot deformation (rolling) of aluminium alloys and its dynamic recovery, dynamic recrystallisation - Dissertation Example The activation energy and diffusion constants are calculated using a variety of factors like the solid solubility, alloying content and the state of the matrix microstructure in terms of grain boundary size, dislocation density and vacancy concentration [PAPM]. The mean distance travelled by the atom during diffusion in turn is dependent on the rate of diffusion D as follows: L = (Dt)? Where L = the mean distance travelled by the atom. t = time (s) All atoms above absolute zero (-273oC) vibrate and the frequency of vibrations acts as the driving force for the movement of the atoms or for their diffusion. The frequency of vibration and diffusion increases with the rise in temperature. However, for atoms to be able to move from one lattice point to the other, the atoms need to overcome the activation energy. This activation energy is low around the metal surface and at the grain boundaries, and this is the reason for the high concentration of the precipitating solute at the grain bound aries. ... Also, temperature has a greater effect on the diffusion distance compared to time as increasing the temperature increases both the number of vacancies in a metal as well as the energy of the diffusing atoms (Wolverton, 2007). Thus, in an increased temperature, atoms are able to diffuse faster and farther. The rate of diffusion differs for atoms of different alloys and hence the reduction of micro-segregation with homogenization differs for different alloys due to the difference in their compositions. As seen from the diffusion equations presented above, the distance that atoms need to travel (which depends on the dendrite arm spacing, the relative abundance of atoms) impact on the time and temperature needed to attain the desired level of diffusion for reduction of micro-segregation. Figure1: Relative homogenization times for given dendrite cell sizes and temperatures in common aluminum alloys. (Source: Chakrabarti, 2001) According to Verlinden et al [1990] found that the dissolution of theta and S particles in an as-cast 2024 billet during a homogenization at 460oC was not possible even after 24 hours. The volume fraction was found to decrease with time but with an associated coarsening of the remaining S and theta particles resulting in coarser particles than when in the as-cast condition. A homogenization temperature of 500oC was found to completely eliminate both the S and theta particles. Due to the distances that diffusing solute atoms travel during practical homogenization treatments, these treatments are effective at removing microsegregation effects but may have little impact on macrosegregation. 2.2 Theory related to Hot Deformation Hot rolling is the

Quality and Environmental Management Report Essay

Quality and Environmental Management Report - Essay Example The philosophy regards the processes to be problematic in general and not the employees. Customer satisfaction being the top aim in a quality management system, good leadership and power delegation at different employee levels for increased participation and teamwork. To achieve total quality management, processes and tools must be integrated with each other and the system itself to be recursively controlled by quality assurance check. Inspite of developing quality control methodologies, many European and American companies have not been able to attain much benefit from them. This is mostly because of lack of insight in implementation and mismatches between processes and problems. This means quality management should be treated as a due process with careful choosing of tools. There is a number of quality assurance tools that can be deployed to support a good quality management system for the house manufacturing company. Since the company is producing prefinished products to support t he on site construction, it is essential that the prefinished components are of good quality as evident by the problem occurring for the company. The basic tools to be deployed for the prefinished products range from production floor to advanced technologies and methods including ISO 9001, total quality management and Six sigma method. Seeing that the company already has a production floor as shown in the brief, it can be improved by adapting to Lean manufacturing in addition to these can help the company reduce the costs as well as increase the quality of their products by eliminating any processes and methods that are not useful for the finished product and customer demand. This will be a sure way to save space in the allocated workshops, clean up the processes and have only the customer oriented processes running. With the continuous improvement from total quality management and statistical controls of the Six sigma method, the defects in the prefabrications should be eliminated. As far as the actual causes of the defects occurring in the products are well handled and eliminated, the finished houses will be of good quality. 2. Plan and describe an appropriate ISO 9001 compliant Quality Management System (QMS), which the organization could employ to improve their quality problems. By meeting unique customer requirements and avoiding non-conformities ISO 9001 can help the company achieve full customer satisfaction (Cianfrani & West 2009). To comply with the industrial standards ISO quality standard improves internal operations and also covers the design research and development. Since the company’s construction is tied to the production of the prefinished products, a holistic approach is the best way to proceed. An appropriate quality management system to comply with a comprehensive set of standards to ensure quality for the customers would be to set up an appropriate organization structure for the company (Case Management Advisor 2004). An appropriate organization structure is a basic set of compliant quality management system that ISO 9001 gives. The organization should start from the top of the organization structure to improve the processes by fixing the processes management structure. The top management should be given clear policies to fully communicate the required products and customer requirem

Haiti earthquake Essay Example | Topics and Well Written Essays - 1250 words

Haiti earthquake - Essay Example This causes earthquake. Three types of faults cause earthquakes: strike-strip, normal and reverse faults. They are measured using the seismometers. The most common scales are the magnitude moments and the richer sale. These two scales are similar numerically over their range in validity. The earthquakes with magnitude less than three are weak and causes less damage while those with magnitude of seven and above are strong. Depending on their depth, they potentially cause damage to large areas (Martin 188). The damage, which is caused by the earthquake, depends majorly on the topography of the region and the quality of the infrastructure. There is no limit for the possible magnitude of the quake. Since 1770, the strongest earthquake to occur was in Haiti. Haiti is in the island of Hispaniola. Haiti means the land of high mountains. Haiti has a total area of approximately 27,750 square kilometers. Its capital is port-au-prince. Haiti was the first nation in the Latin America to attain i ndependence. The independence was gained because of successful rebellion against rebellion. A severe earthquake struck the country in 12 December 2010 at 4:53 pm. The magnitude of the quake was 7.0 and its epicenter hit about 10 miles to the west of the Porte-au-prince, which is the capital city of Haiti. The inhabitants are poor and the earthquake affected its two million inhabitants, which is about 2% of the total population. This led to a humanitarian crisis that is still being responded to desperately by the world. The major concern is helping the people of Haiti who still have unanswered questions about the quake itself. Why it was not predicted, why it was that strong, and why it caused a lot of destruction. Haiti, Jamaica, Puerto Rico, and the Dominican Republic are on the Caribbean. Active tectonic plates border the Caribbean so that the whole region is prone to earthquake. The part of the plate that ruptured goes through Haiti and continues to the offshore and to Jamaica. T his was the fault of enriquillo plantain garden (Xingjian 92). It is one of the fault structures that have been separating Cuba in North America from Haiti in the Caribbean plate, for more that million years ago. The plate is relatively small and the larger plates surround it. One of the plates is the North America plate that is constantly exerting pressure. The opposing forces resulting to formation of volcano and earthquakes create great action of seismic waves. The Caribbean plate moves approximately 21 millimeters towards the east in relation to that of the North American plate. Enriquillio fault takes about seven millimeters of these. In 1751, the last major earthquake in the port-au-prince region occurred. This is important because in case that fault was locked or stuck for the past 260 years that could give the reason for the slip deficit in the segment of about two meters. If a plate is moving a distance not less than 21 mm, the plate does not move as a whole at one time, so me part remains in position. So if there had been no activity for the past 250 years, then there is a high amount of strain and approximately about one to two meters of this movement missing (Maurine 120). If the pressure builds over a long time, the greater magnitude of Earthquake happens. This explains why the Haiti quake was seven. The destruction was massive majorly because the earthquake was shallow and just below port au prince. It

Abstract Assignment Example | Topics and Well Written Essays - 250 words - 2

Abstract - Assignment Example This wall provided a platform in which most artists created their art with the main aim of communicating. The street art in Germany, Berlin to be precise, went on after the wall was pulled down in the year 1989 when Germany was reunited again (Visconti et al., 520). Street art has been seen to have a large influence on both political and social cultures of people all over. For instance, artwork in San Francisco, worked a lot for the people by communicating with both leaders and society. It was used by people in San Francisco to struggle of peace movements, gay rights, and the horrors of capitalism. At the same time, the artwork in both the middle class, underprivileged and wealthy neighbourhoods, which always acts as a reminder for equality throughout social classes (Dickens, 70). Art work in Berlin, paid a lot more over the time when there was oppressive and the country was separated into two, street art, worked as the voice of the people without much rebellion and did not all go in vain, it led to Germany being reunified. At the same time, these artworks serves as the best custodian of the historical revolutions Germany has gone through (Riggle,

Authentic Counselor Coursework Example | Topics and Well Written Essays - 250 words

Authentic Counselor - Coursework Example Such counselors require certain qualities such as having a good sense of who they are, what they are dealing with and be aware of their shortcomings and care about the needs of their clients. There are characteristics in authentic counseling, which include honesty and willingness for the participants to accept and admit when they are wrong (Scott, 2012). Other characteristics that are necessary are asking sincere questions, listening actively and emphasizing. An authentic counselor must have an identity, appreciate, and respect him or herself. They must recognize and accept their power and be open-minded to change, feeling alive, having a sense of humor, and making appropriate decisions. Authentic counselors must be able to live in the present, appreciate culture, have an interest in other people’s welfare, and find value in their work, which enables them to create healthy relationships with their clients (American Counseling Association, 2014).. An authentic counselor means someone who is real and honest with his or her clients. This means that something that is real is something that is valuable or rare therefore clients should be able to value their counselors and therefore find worth in their

IT Project Implementation Failures Essay Example for Free

IT Project Implementation Failures Essay Subsequent to a health care organization acquiring a new information system, is the system implementation process, the third of four stages in the systems development lifecycle. A significant amount of support and dedication is needed from senior executives and should take precedence within the organization. Adequate resources should be available to all individuals involved in the execution of the new system. User training, installing new networks, converting data, new procedures, and various other changes must be properly coordinated to avoid political, cultural and behavioral issues (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). Selecting an implementation team and appointing a system champion for the team is vital to an organizations success. These individuals plan, coordinate, budget and manage every phase of a new IT system implementation (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). The configuration of the team are different levels of the organizations workforce, for example; CIO, Physician, Radiology Director, Nurse, Business, and Lab Managers. A system champion views the IT system as a way to provide better patient care, is well respected within the organization, assumes the leadership role, and will be an advocate for the information system (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). Determine project scope and expectations are the implementation team’s first order of business. Reviewing the system goals, which were outlined in the system selection process, will give the team a better understanding of the organizations expectations with the information system (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). Meeting with senior health care executives to discuss relevant overall strategic goals and dedication to the new development. The organization has appointed  an implementation team and champion; objectives and achievements have been set; the last step is to establish and institute a project plan. The plan should be detailed and include: Target dates Time of each activity Milestones Budget and resources Major activities Responsibilities/dependencies (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). Components of the Implementation Plan: Workflow and process analysis System installation Staff Training Conversion Communications Prep for Go-Live Date (Wager, Lee, Glaser, 2009, Chapter 6, System Acquisition). According to Wager, Lee, and Burns (2009), only 35% of new IT projects are successful (Chapter 14 Managements Role in Major IT Initiatives), 46% delivered useful product, but did not meet timeline goals, went well over budget, and had system and user issues. The percentage of failed IT systems 19%. Strategy and implementation failures are at the forefront of the collapse (Wager, Lee, Burns, 2009, Chapter 14 Managements Role in Major IT Initiatives). There are numerous ways a heath care organization and the professionals encumber IT projects; Lack of clarity and purpose, inadequate leadership support, organizational baggage, lack of dedication, project complexity, and disinterest (Wager, Lee, Burns, 2009, Chapter 14 Managements Role in Major IT Initiatives). The majority of system implementation failures can be impugned upon management action or lack of. To limit the risk of failure, executives need to be clear about objectives, communicate often, eliminate disruptions, welcome debate, stay away from extra unwanted issues, and keep in mind no one is perfect and mistakes will happen (Wager, Lee, Burns, 2009, Chapter 14 Managements Role in Major IT Initiatives). When implementation teams and lead executives fail to follow  project plans or mismanage activities, the outcome is dissatisfied users, monetary suicide, and information system sabotage. Honesty, compassion for the project, and clear communication will keep the implementation process on track for success. The outcome for the organization is better patient care, higher revenue, and fewer errors with medications and prescriptions. Organizations will need time, dedication, patience and planning when implementing a new information system. References Wager, K.A., Lee, F.W., Glaser, J.P. (2009). Health Care Information Systems. A Practical Approach for Health Care Management (2nd ed.). Retrieved from The University of Phoenix eBook Collection Database

ICT in health services

ICT in health services ICT in health service. Information technology coursework- 1ST draft Improving the health of individuals and communities, and strengthening health systems, disease detection and prevention are crucial to development and poverty reduction. ICTs have the potential to impact almost every aspect of the health sector. In public health, information management and communication processes are pivotal, and are facilitated or limited by available ICTs. ICT-Information and Communications Technology is a study or business of developing and using technology to process information and aid communications. ICT can be used nearly everywhere around us; at schools, in police stations, libraries, banks, weather forecasting, supermarkets and in health services. It makes our lives easier, by quicker and good quality research, by storing important information, and quick passing down of any information, in nearly every form that we want. ICT in health services is used mainly to achieve poverty reduction and improving health of the most poor and exposed to many diseases, because of lack of medicine, people.   It already have made a big impact on the health care by: Improved   spread of public health information and facilitated public conversations around major health threats. Enabled distant consultations, diagnosis and treatment trough telemedicine(an application of clinical medicine where medical information is transferred through a phone, internet or other networks) Facilitated teamwork and cooperation among health workers More effective health research Strengthened ability to monitor public health threats and responding to them very quickly Improved efficiency of administrative systems. ICT is very important in health services because improving health includes improving public health and medical   programs designed to provide optional, emergency, and long-term clinical care. Reliable information and effective communication, like mobile telephony, e-mails or video-conferencing, are vital elements in public health practices.   Doctors from all around the world may communicate with each other and discuss any health issues without leaving their homes or offices. Also, increased and more accessible information helps people with improving their own health. The use of ICT in health sectors have focused on three broad categories: Improving functioning of   health care systems, which includes management of patients care and records, administrative and ordering systems . Improving the delivery of health care through better diagnosis, training among workers, and supporting them in primary health care. Improving communication in health services, including improved communication between workers and feedback on the impact of health services and interventions. ICTs help with improving the health care delivery in a number of ways. Telemedicine is one of them. It helps countries deal with shortages of professional doctors through better coordination of resources and helps in sharing experience and professional development. Also, there are ICTs like radios. For instance, in Nepal, rural health workers may get information and support through the radio. They are given a chance to receive standardized instructions. HIV and AIDS are supported by electronic network and communication. Electronic networks are valid and workable means of providing learning and dialogue, highlighting issues and creating virtual conferences among those who cannot attend in person. A project in South Africa, Asia and the Pacific was created to provide electronic networking and communication, so that an opportunity is given for people to attend many conferences. In developing countries, many health workers involved in primary health   are isolated. They often work alone, and have little or no access to up-to-date information and chances to exchange experience with colleagues. The situation is starting to improve though, thanks to PDAs(Personal Digital Assistants)-small, handheld devices that enable workers to have access to important and needed information, store and capture health data. In Ghana, Kenya   and Uganda PDAs are very common. In Ghana, they are used by community volunteers. In Kenya, medical students were equipped with the small devices, that were loaded with relevant information about their studies. While in Uganda, practicing   physicians were given the devices containing basic reference material as part of their continuing medical education.   In summary, telemedicine provides benefits, like urban and rural linkages and connecting health staff to centralized health expertise. Phones and e-mails that are incorporated into medical practices can make a significant difference. Also, multiple ICT routes are used for e-learning in a mixed toolbox approach, eg. Using internet, SMS, PDAs, radio, printouts. People take in new information, ideas, and approaches in terms of their own local context and social, economic and cultural processes. They   adapt them into their daily realities in ways that help them better deal with the local situation. They have to understand the culture of another country and find out whether the treatment they want to give the patients is right for them, taking into account their religion, for example. ICTs help them with that.   They provide opportunities to encourage dialogue and social mobilization. Approaches that are being used for any of these purposes include: developing internet information portals, using mass media to broadcast widely, developing interactive programming on broadcast media and making more effective use of existing communication systems. Communication systems are already quite developed, still, though, they need an increase in effectiveness. We can observe the quick development of communication systems through, eg. GIS-Geographical Information Systems. These devices have a very important use; they help to predict and identify the spread of any harmful diseases. In many countries, it already had helped a lot. In Bangladesh, GIS data had been used to warn the health authorities from the spread of cholera in coastal cities. Communication systems may be developing, but there are three main barriers that restrain the successful application of ICT in the health sector in developing countries: connectivity, capacity and content. With connectivity, the issues are about lack of access to electricity,   high costs, lack of telecom policy or solar power options. With capacity, the problems are with ensuring that information are culturally appropriate. While content problems include lack of   local content creation and the language used. Although, many poor and developing countries already use ICTs in the health sectors, they still have to be developed, so there is two-way communication and the messages and information are clear. A good example is Namibia, where there were statistics made how Namibian doctors used ICTs to deliver health services to their patients. A questionnaire was administrated to 21 health service providers in two regions of the country, from one of which was rural, the other urban. All said that ICTs are very important (100%). 91% said ICT helps them interacting with other health service providers. The most common ICT is a telephone(36%), the next one is a PC (23%). The most commonly used channels of communication with patients are telephones followed by television.   Namibia has big problems with budgets and lack of basic infrastructures, like electricity or telephone lines. â€Å"There is a need to promote ICT use for health service delivery and also to stimulate patients to use ICT to acce ss health services and relevant information.† ICTs in health services are very important. Thanks to ICT health workers may make better treatment decisions, hospitals will provide better quality and safer care, people will make informed choices about their health, and policymakers will be better informed of any risks. Also, health service workers have to communicate between each other to help reduce poverty and help the poor. It is already achieved by telephones; SMS, calls, internet: e-mails, video-conferencing, but still has to be developed due to many barriers, like lack of telephone lines or poor access to the internet. Also, governments have to invest in organization of health services in their own countries, and, for example, bring the NHS plan to life. It will still take a lot of planning, evaluating and money, but the better the communication between countries and health services in different places, the bigger the chance of reduction of diseases, epidemics or any sicknesses. As we can see, ICTs may help very much in the health service, but looking from the other side, ICTs may damage our health. There are various problems with health that are consequences of the use of computers, watching television etc.   We are susceptible to stress, eyestrain and injuries to the neck, back and wrists.   Therefore every employer, every parent, every child must be careful and take steps to protect themselves and others.   While using the computer, we sometimes do not think of all the consequences and we do not even know how serious they could be. If the monitor flickers, you do not use a screen filter and do not take regular breaks, you can have a headache, your eyes may burn and itch. What else can happen to you and why? Back pain, due to the weird position we have while sitting in front of the computer, R.S.I. (Repetitive Strain Injury), which means your hand may be weak, swelled etc. The most common one, especially at work, is stress. â€Å"Many people are afr aid of computers, they dont understand them and feel they will look stupid if they admit that they dont know how to operate one. People worry that a computer will be able to replace them and they might lose their jobs.† These are just some reasons why people may feel stressed out because of the computers. The employer needs to provide steps to protect his workers, as the law (‘Health and safety Act 1974) states.   The law states that an employer must: provide tiltable screens provide anti-glare screen filters provide adjustable chairs provide foot supports make sure lighting is suitable make sure there is sufficient space for people to work train employees how to use work stations correctly ensure employees have sufficient breaks pay for regular eye sight tests for anyone who needs prescription glasses in order to use the computer. To protect us from the side effects of using computers, a science had been introduced, which concerns designing safe and comfortable furniture and machines. It is called ergonomics. It states sunlight is the best light but it cannot reflect in your screen, the desk should support your arms, the computer monitor should be at the eye level or just below, and the screen should be about 45 cm away from your face etc. Nowadays ICTs are our companions nearly everywhere.   It is extremely important in the health service (and not only), mainly because of the quick passing down information and it was created to reduce poverty and help people, but we still cannot forget that it can damage our health, as well as improve it. Important or not, we have to use ICTs wisely. Bibliography: http://www.teach-ict.com/gcse/theory/healthsafety/miniweb/index.htm http://www.ictri.port.ac.uk/overview.htm http://www.publictechnology.net/content/1480 http://jtt.rsmjournals.com/cgi/content/abstract/14/6/285 Improving health, connecting people; the role of ICT s in the health sector of Developing Countries, framework paper, 31st May 2006. Improving health, connecting people; the role of ICT s in the health sector of Developing Countries, framework paper, 31st May 2006. http://www.webopedia.com/TERM/I/ICT.html http://jtt.rsmjournals.com/cgi/content/abstract/14/6/285 http://www.ictri.port.ac.uk/overview.htm http://www.publictechnology.net/modules.php?op=modloadname=Newsfile=articlesid=1480 http://www.teach-ict.com/gcse/theory/healthsafety/miniweb/pg5.htm http://www.teach-ict.com/gcse/theory/healthsafety/miniweb/pg7.htm