Research for Human Resource Management Activities Essay

With increasing globalization, most multinational corporations can not avoid cross-culture management issues. Especially, cross-cultural human resource management (HRM) has becoming one of the critical operating strategies. And in this paper, we will mainly analyze the current situation of human resource management activities that include selection and recruitment, training and development, and performance management in the Chinese and Australian cultural background. We aimed to find out the differences of human resource management activities between Chinese and Australian human resource department, and look forward to helping a Sino-Australia joint venture (JV) enterprise which is poor at cross-cultural human resource management. Culture forms values, creates attitudes, and influences behavior (Luthans & Jonathan, 2009). Due to national traits and region of culture, the interaction between different cultures is considered as cross-culture. And under the cross cultural background, international human resource management should carry out the activities of human resource management based on characteristics and differences of culture (Ramamoorthy et al. , 2005), which could increase the efficiency of human resource distribution and utilization. According to the Hofstede’s theory, we have got five cultural dimensions which as power distance, individualism versus collectivism, uncertainty avoidance, masculinity versus feminism, and long term orientation versus short term orientation (Hofstede, 1984). China and Australia have obvious differences in the cultural dimensions, which are showed as follows. Comparison of China and Australia on cultural dimensions cultural dimensions |China |Australia | |power distance |high |low | |individualism |low(collectivism) |high | |uncertainty avoidance |low |high | |masculinity |balanced |above the average(masculinity) | |long-term |high |low(short-term) | Source: From Hofstede and Hofstede, Cultures and Organizations: Software of the Mind. And then we will analyze the activities of human resource management as selection and recruitment, training and development and performance management under their respective cultural backgrounds. Firstly, in selection and recruitment human resource activities, there is a large difference between HRM of Chinese enterprises and Australian enterprises. In Australia, the labor pool is relatively mature and developed (Dobbie & MacMillan, 2012). Because of Australia is supposed to value individualism, the HRM of Australian companies used to selecting and recruiting much people depend on market mechanism. Labors change their job and joined choice making with the need of market and the HRM think the person is wanted by them can be got through the mobility of trained personnel and market competition. They do not think this kind of person is disloyal to a company in their mind. But China emphasizes socialist collectivism as the value of the times. And in the case of collectivism, the HRM of Chinese enterprises tends to select and recruit the talents in the range of their favorable groups, they think the groups of graduates from famous colleges that should have the inherent abilities. So the degrees from domestic-famous such as Tsinghua and Peking University would be preferred by HRM. Furthermore, the HRM of Chinese enterprises attach great importance to ‘Guanxi’ (relationship) in the selection and recruitment of employee (Wang & Cindy, 2008). And by the impacts of ‘Guanxi’, the HRM of Chinese enterprises trend to create a job in order to accommodate a person, without considering person’s ability. So these situations have been a contrast with fair competition rules of Australian HRM. On the other hand, Australia is a short-term oriented country, the relationship between HR managers and staff is simple which is similar to a buyer-seller relation in short term. The manager of human resource department generally prefers candidates who have strong capacity to work and innovative consciousness. On the contrast, the long-term oriented Chinese HRM focuses on employee royalty, and try to reduce the rate of staff turnover. They expect employees to work steadily in long term, instead of frequent turnover behaviors in the workplace. Furthermore, because of the high power distance, in the standard of personnel selection in Chinese HRM, they mainly focus on personal background and seniority (Zhang, 2003). There is an obvious top-down hierarchy; the higher position is decided often by strong background and seniority. However, in the Australian HRM, the first is that personal ability to work and communicate. The job is offered to the person who is capable, and the manager of human resource department offered the qualified person an opportunity to move ahead quickly. Secondly, in the parts of training and development, there are also some differences between Australian and Chinese HRM because of the impact of different cultural dimensions. Under the influence of collectivism culture, what contents the Chinese enterprises use to train their employees generally have to meet the organization’s development goals . Most employees accept their superiors’ arrangement of the job training ,which mainly provides them with the skills training aiming at the skills that their job needs (Xiao et. al, 2011). This kind of job training is only beneficial to employment needed skills. Furthermore, being influenced by the high power distance, in the training process, the employees who are being trained are under high pressure from their superiors and have to accept the arrangement of training. Because most of the trainings are passively accepted, obviously it doesn’t work to take the ways of high participation training in China. Under the influence of individualism culture, the HRM of Australian enterprise lays stress on the career training and continuous education. The training was provided by HRM for their employees usually can help the employees to achieve their personal goals, but may be far away from the whole organization development vision, but beneficial to the employees’ personal future careers. And in such a low power distance country like Australia, the employees who are being trained appear more active in the training process. They are more willing to show themselves, and actively express their ideas; meanwhile, they are good at communicating with the coach. Thirdly, in the part of performance management, there are also some differences between Australian and Chinese HRM. Being influenced by the high power distance, in Chinese enterprise, the performance management system is usually built by the top manager, so the top manager decides the performance standards and evaluation criteria. There is a low involvement of employees. However, with the lower power distance, employee could participate in the performance system building, the employee and HR manger could come together to develop a performance management system. Australian advocate individualism, and emphasize personal achievements and rights. But in a country emphasizing collectivism culture as China, the values of pursuing the harmonious atmosphere makes the interpersonal relations in the collective obviously more important than individual achievements. When it comes to the performance evaluation, Australian emphasize standardized and quantified performance evaluation system, hoping that they can objectively measure individual contribution and value, while Chinese prefer the traditional way of evaluation which usually depends on experience because they don’t want to destroy the harmonious unity of their collective (Rajendar ; Ma, 2005) . And on the other hand, in Australian enterprise, the compensation system depends on the staff function and ability with low power distance. In this system, it is not unusual that employee with special skills or talents could get more compensation and bonus than manager in higher position. But in Chinese enterprise, the compensation system mainly focuses on job grade and employment level. There is a clear rank in the compensation system. In conclusion,  it’s very easy to find that main differences in the activities of human resource management between Chinese and Australian enterprises from what has been mentioned above. So far, for a Sino-Australia joint venture enterprise, it is necessary to combine comprehensive considerations cultural background of China and Australia for carrying out the human resource management activities. Furthermore, the joint venture enterprise should place great emphasis on building of enterprise culture and foster cohesion and centripetal force enterprises. Usually successful enterprise has excellent enterprise culture which enables employees to establish common values and standard of behaviors (Deem, 2009), it built a great channel between the parent-country nationals and host-country nationals to communicate more smoothly, that is helpful to minimize any culture clash. And in order to achieve optimal allocation of human resources under the context of international, Of course, there will be also many challenges and hardships along the way.

Two Peg Test

FIELD WORK TITLE FIELD WORK TITLE Two peg test INTRODUCTION INTRODUCTION Two Peg Test is a surveying operation carried out to determine whether the leveling bubble and telescope line of sight are parallel. OBJECTIVE OBJECTIVE Peg Test is a surveying operation carried out to determine if the leveling bubble (bubble axis) and telescope line-of-sight (line of collimation) are parallel. TOOLS TOOLS Dumpy levelTripod Staff Tape Bubble staff FIELD WORK PROCEDURE FIELD WORK PROCEDURE . Each group is required to perform a peg test to check the instrument. ii. Each person in the group is record the results of the Peg Test in their own field book. iii. Set out and mark on the ground (with wooden pegs driven into the ground) two point some 15 m apart. iv. Instrument is set up midway between two point A and B. v. Staff is read on each staff point A and point B and the height difference is calculated. Made sure the bubble staff is center vi. Next, instrument is moved about 5m behind the point B. nd staff at point A and point B is read. vii. Record the data. RESULT RESULT Point A1 – point B1 =1. 312 – 1. 310 =0. 002m Point A2 – point B2 =1. 239 – 1. 238 =0. 001m STN 1 – STN 2 = 0. 002 – 0. 001 =0. 001m =1mm ? <  ± 2mm ANALYSIS ANALYSIS The error is  ±2mm so it can be accepted. The instrument is in good condition and can used in field work. CONCLUSION CONCLUSION The instrument can be determined the leveling bubble (bubble axis) and telescope line-of-sight (line of collimation) are parallel.

Informative Speech on Influenza

Title: Influenza Purpose: The purpose of my speech is to educate the audience about prevention, treatment and how to know whether a person is suffering from the flu rather than another illness such as the common cold. Thesis Statement: There are many different ways to break the chain of infection and protect yourself and those around you from getting the flu, starting with something as simple as hand washing is one of the key ways to reduce your risk of many illnesses including the flu. I. Introduction A. Attention Getter:Millions of people in the United States become sick with the flu each year and there’s probably a good possibility that most of the people in here have suffered from it at some point in their life, do you know how to treat the flu if you or someone close to you has it, or do you know what measures to take in order to prevent yourself from getting it? B. Relevance Statement It may not seem severe to many people in here but if you plan on entering the healthcar e field then you will probably encounter many patients over the course of your career that are ill with the flu.If these patients are elderly, infants or pregnant women then it is important that you know the signs and symptoms, ways to treat the flu and methods to prevent the flu to avoid complications related to the flu ranging from pneumonia or even death according to the CDC (2013). C. Credibility Statement I have been working in the healthcare field for the past six years and currently I am employed by a local nursing home as a licensed practical nurse and these past two months have been hectic due to the severity and outbreak of the flue this year.When one person contracts the flu in a nursing home it spreads quickly. This year we had to shut down dining our main dining room where residents can eat together and also the resident common area due to the outbreak of the flu this year. It started with one person and then next thing you know within days over half of the residents we re showing signs and symptoms of the flu. Next thing we had to do was protect staff from the ones who tested positive for the flu by having them wear masks, gown and gloves whenever going into a room with a resident that had the flu.Then almost everyone resident needed their vital signs measure especially their temperature every shift and not long after that every resident was placed on Tamiflu which is an antiviral medication to prevent the flu or lessen the severity if you already contracted the flu. The point I am trying to make is that the flu is not only severe and spreads quickly it also takes a lot of work and costs quite a bit of money to treat especially when you have an outbreak that nearly spreads through the whole facility which is not uncommon in nursing homes during flu seasons. D.Thesis Statement: There are many different ways to break the chain of infection and protect yourself and those around you from getting the flu, starting with something as simple as hand washi ng is one of the key ways to reduce your risk of many illnesses including the flu. E. Purpose: The purpose of my speech is to educate the audience about prevention, treatment and how to know whether a person is suffering from the flu rather than another illness such as the common cold. Transition: First, let me begin by defining some of the common causes and symptoms associated with the flu.

Business Essay Example | Topics and Well Written Essays - 250 words - 13

Business - Essay Example The movie profiles the cases of seven employees who have acquired injuries in the course of their employment. One of the victims is Marcos Lopez. He has worked in the company since high school. Marcos suffers serious back injuries from working form long hours sometimes up to sixteen hours in a day. The company Tyler pipe has a record of violating the safety rules. A former engineer with the company, Ron Howard describes the company’s policies that safety is sacrificed to increase productivity and make profits at the expense of humans. In a scene on the movie, a man dies when moving iron parts. The corporation responds by saying that he was a good man who made a very big mistake. Other actors featured are Kennedy Valve and Frank Wagner. They are ordered to dispose of toxic paint into an incinerator. Frank Wagner dies from an explosion in the oven. The company also does not provide adequate training for the job. Mc Wane Company also requires employees to sign a contract that they should never sue it and therefore benefiting from the compensation. The movie also features a single director for the entire plant known as Clyde Doran. The director does not have authority to stop production. He is also ordered to withhold information from officials. After the death of Frank Wagner, criminal charges were forwarded against the company. They were charged with criminal negligence. Consequently, Mc Wane threatened a massive loss of jobs if forced to change its policies. Other late discoveries were made. Delaware River had an eight-mile oil stick that came from a Mc Wane pipe plants holding tank. The companies holding tanks were not big enough for toxic waste that the company produced. In response, Mc Wane defended itself by saying that with competition from all over the world mainly China and Latin America, it is hard to maintain the environmental

Marketing of financial services Essay Example | Topics and Well Written Essays - 1500 words

Marketing of financial services - Essay Example Reduction in the incidence of interest rate clustering, however, is not very costly. Hence, Ashton and Hudson implied that the more na've customers should take a more active stance in their finances - be more involved as "[t]he degree of price or interest rate clustering appears to be exaggerate when low levels of financial involvement are concerned" (Ashton & Hudson 2008, p. 1402). Citibank offers several savings and investment products, whether local currency denominated or foreign currency denominated, to its clientele. These savings and investments products are offered with range of interest rates. A look at the bank's Web page on its savings and investments products shows that its US Dollar Reward Saver is marketed as giving 2.50 per cent gross per annum rate which is much higher than the account's actual annual equivalent rate or AER of 2.02 per cent. Although both rates were published in the Web page, a na've customer - whose interest or whose lack of "ability to process information" (Ashton & Hudson 2008, p. 1393) is the one being exploited - would immediately zero in on the "earn up to 2.50% gross p.a. fixed for 6 months" (Citibank 2008) and ignore the subsequent "2.02% AER on your US Dollars in the UK2.50 per cent gross" (Citibank 2008). Clearly, in this example, the bank is playing in a very broad context of marketing ethics. Another example is the bank's Reward Saver Issue 2 product which is being offered at a gross per annum interest rate of 6.35 per cent while in reality, the customer will actually be getting an interest rate closer to 5.08 per cent which is the AER. Even the AER is structured in a way to maximise or to exploit the na've's customer's tendency to round up - in here, the na've customer would think that 5.08 per cent is substantially higher than 5 per cent. An example which provides proof to Ashton and Hudson's conclusion on the rounding - "If the number is not already a round number an individual would round a number to the closest reference number" (Ashton & Hudson 2008, p. 1394) - is the bank's net interest rate per annum for its 60 day direct savings account. The bank gives 2.48 per cent for accounts with more than '75,000. A customer with the characteristics described by Ashton and Hudson will immediately round this rate off to 2.5 per cent. The 0.02 per cent difference from the rounding off can be translated to '15 every year for a '75,000 account! Ashton and Hudson observed that for mortgage rates, the interest rate clustering "occurs very frequently just below round numbers giving strong evidence for the common use of na've number processing strategies" (Ashton & Hudson 2008, p. 1401). Unfortunately, for Citibank United Kingdom (and even for HSBC UK) I could not obtain interest rates for their mortgage products, hence I applied the findings of the research to the bank's credit card rates. For its Citi Platinum MasterCard, Citibank charges 5.8 per cent for balance transfers and an APR of 16.9 per cent which are examples of the observation made by Ashton and Hudson - clustering just below round numbers. This can also be observed in the bank's Citi AAdavatage

Legal and Ethical Considerations in Marketing, Product Safety, and Essay

Legal and Ethical Considerations in Marketing, Product Safety, and Intellectual Property - Essay Example This is sound ethical behavior, even if such reporting will result in severe financial loss to the company. All of the issues and more are covered in this case study. It is important to consider the reality of direct-to-consumer (DTC) marketing by consumer and its potential impact. This paper will analyze such issues in the context of PharmaCARE, while also exploring intellectual property considerations and U.S. law. The backdrop to this dialogue will be a strong consideration of the ethical obligations that a company like PharmaCARE has to the global community. Direct to Consumer Marketing and Drug Companies Simply put, direct to consumer marketing involves the promotion of a product in mainstream media. The intent is to promote the product by appealing the potential consumer directly. The term is actually most commonly applied to the pharmaceutical industry, which makes it worthy of discussion in this case. Drug companies that engage in direct to consumer marketing bypass health pr ofessionals and attempt to reach the patient directly. The Federal Food and Drug Administration regulate such advertising, yet many professionals claim that the oversight is quite lax and ineffective. There are several concerns with this method of advertising that applies particularly in the case of PharmaCARE. It should be noted that the most common methods of direct to consumer marketing include television advertising, print, radio, and now social media outlets. With the lack of adequate oversight, questions of an ethical nature are frequently asked when considering whether or not drug companies should use such a marketing strategy. Advertising companies are not health professionals. They do not diagnose patients and they cannot adequately determine if the side effects of any given drug may be counterproductive for the consumer. While pharmaceutical companies are required by law to indicate potential side effects of the drug being marketing, and they are only permitted to tout pro ven benefits of the medicine, such disclaimers are often not clear to the consumer. This can lead individual patients to try and self-diagnose their own illnesses, and then approach their own physician about getting a particular drug prescribed to them. This leads us to yet another ethical dilemma. If an advertising campaign for a new drug floods the airwaves, physicians may become inundated with requests to prescribe the drug to their patients. This puts the physician in an awkward position. They may end up overprescribing the drug, doing so without themselves actually researching the drug and feeling comfortable in its use. This creates the ethical question of whether drug companies should even be permitted to engage this practice at all. The argument is that they should only allowed to promote their products directly to health care professions, who can then decide which drugs best suit their particular patients. The practice of direct to consumer pharmaceutical advertising (DTCPA ) has so many ethical implications that most countries have an outright ban on the practice. Only the United States and New Zealand permit its broad use. This is the reason that PharmaCARE has been permitted to engage in the practice. To be fair, not at all pharmaceutical companies market their drugs directly to the consumer. It seems to be

About Prometheus Bound Essay Example | Topics and Well Written Essays - 500 words

About Prometheus Bound - Essay Example When asked Prometheus denied Zeus the information he held regarding who it would be that threatened the throne of Zeus, so as punishment he was bound by shackles to a great rock. In Prometheus Bound (n.d.), Prometheus must come to terms with his own limitations in power, but demonstrates that Zeus has limits as well. Prometheus was a god, but felt he had little influence in the matters of the Gods. Prometheus, known as the teacher of all arts, suffered at least partially because of his aid to humankind. Prometheus was fond of humans and, wishing them to flourish, took fire from the gods and gave it to the people. The fact that Prometheus cared deeply about the human race was in strong contrast to how Zeus felt, and was a main point of disagreement between the two. Prometheus described Zeus’s feelings toward humankind when he stated, â€Å"It was his wish to wipe out man [sic] and rear another race† (Aeschylus 6}. For this reason, Prometheus defied the divinity and super ior knowledge of Zeus. If Prometheus were given absolute power, he would be ensured that tyranny would fall and justice reign supreme over the gods and the human race.

Critical review of a live poetry reading Essay Example | Topics and Well Written Essays - 1000 words

Critical review of a live poetry reading - Essay Example nce, it was such a well-planned and well-organized event that they all had a good time, and quite obviously, so did the live audience that comprised teenagers, teachers, the city’s elite, poets-in-the-making and, of course, reporters. In the Cyber Age, for the pessimists who worry that the art of writing and enjoying poetry is on the verge of extinction, the event certainly holds a promise and a hope. They may rest assured. Surely, poetry isn’t about to die. Not so soon! There is no denying that every participant was just as good. Nevertheless, among the best performers were McElwee, Jehanna, Robin Webb and Mona Scott, though it must be acknowledged that it was McElwee’s voice that overshadowed the rest of the programme. Thanks to the open mic scenes that make life in San Francisco a delight. Mona recited a poem titled ‘Advice to a Lover’ (Relationship-Advice-Bootcamp). Though her entire collection dwelt more or less with the theme of love, this particular one was delivered in such an absorbing manner that it almost immediately caught the imagination of every one in the audience, perhaps because it has something to offer for every young man and woman. It was hard to believe that a woman barely in her twenties could accomplish such mastery over the skill of verbalizing the heart’s deepest emotions so effectively. The text of the poem is therefore provided hereunder with the assumption that there might be many readers might find it interesting enough to preserve and add to their library. The title of the poem is itself almost self-explanatory as to what it is about to say. It is rare to find love poetry that is not dominated by the element of tragedy. The final success of the poem lay in its ability to evoke similar emotions in the hearts of the listeners. Usage of words like hath, withal, honies, thee, thyself etc. give the poem a classical, nineteenth century touch. Still the poem, as a whole, sounds perfectly relevant even to the most modern times.

Wireless network implementation (Enterprise Network Design (Aston)) Case Study

Wireless network implementation (Enterprise Network Design (Aston)) - Case Study Example There will be a mesh topology setup in the core and distribution layers. Along with the redundant paths there will be redundant hardware in those layers. This will allow for more throughput and fault tolerance. QoS will also be implemented in all layers of the network to improve performance. The current reliability problems are half hardware failure and half over utilization of circuits. With the addition of QoS and redundancy, we can assure that mission critical applications will never fail. Aston is a leading firm in the private sector legal support business. These accounts are served worldwide by their franchise network. As you can tell, Aston is on a mission to keep trucks rolling by creating and delivering the best products and services for customers. The current network design analysis showed us that there are strong areas of the network and many weak areas. The current networks strongest point is in the campus backbone. Currently there is a full mesh between all routers. Because of this setup the backbone is the strongest part of the network. However, the backbone is currently running on 100 Mbps copper which is causing bottlenecks during peak usage. The existing network has far more weak areas then strong ones. We found one of the weakest areas of the network to be in the server farm. ... Also, all connections were made with copper to the campus backbone which limits the speed. Another area of concern is with the building distribution layer. This layer also has no layer 3 capabilities and has no redundant paths. There are multiple switches in the building distribution but in the event of a failure the core will have to reroute all traffic due to lack of appropriate redundancy. Another area that lacks redundancy is the edge distribution module. Currently if the edge distribution router were to fail, all internet and internal communications with other branches would be lost. Along with lack of redundancy, there were many security concerns. Currently there is only one firewall and it is placed between the internet service provider and the edge distribution router. This is a good start to securing the network but there is a lack of intrusion detection which is a concern. Also, the current e-commerce connection is in front of the firewall which provides absolutely no protection to the e-commerce server from the outside world. Finally, the other area of concern is the lack of outside accessibility. Currently there is only one remote access server which accepts incoming modem connections. The current system is not capable of support the very large mobile work force of Aston and it does not support current technology. In order for a remote worker to gain access to the network they have to have a dial up modem and a telephone line. Once the connection is made the speed is slow and the functionality is limited. Along with the lack of speed and functionality, the network is limited on its ability to upgrade to VPN technology. Currently there is only one internet service provider that only provides 3 Mbps which is barely enough

Was the United States genuinely neutral during the first years of Essay

Was the United States genuinely neutral during the first years of World War I, - Essay Example to remain neutral throughout the war. At the war’s beginning (August, 19 1914), Wilson, along with congressional and public opinion was adamantly opposed to intervention by U.S. military personnel. He, as most Americans, did not want to get entangled in what seemed was a perpetual European conflict. In 1916, Wilson won re-election principally as a result of the campaign slogan ‘He kept us out of war.’ â€Å"Between 1914 and the spring of 1917, the European nations engaged in a conflict that became known as World War I. While armies moved across the face of Europe, the United States remained neutral† (Duffy 2002). Because of diplomatic, economic and cultural ties to the U.K., the U.S. began supplying the military needs of the allied forces. Public opinion had swayed toward the allies during the war as word spread of alleged horrific acts committed by German troops. U.S. exports to the U.K. and France rose quickly and sharply while U.S. shipping to Germany de creased by similar proportions during this same time. Germany viewed this action as all but an act of war though the U.S. was officially neutral and still strongly opposed to sending its troops (Duffy 2002). The U.S.

Digitalization if school materials, good or bad Essay

Digitalization if school materials, good or bad - Essay Example Digitalizing education helps students to understand lessons better, and eventually success comes with it. Digitalization of school materials is very advantageous because it helps students to understand better, makes it much easier to follow their works, grades and gives them a vision.   Firstly, teachers teach better with the help of digital world with introduction of teaching aids such as smart boards, as before there were only normal blackboards for teaching purposes in classes. Teacher could write something and they could erase that written sentences during the class time. However, today much more things can be done with smart boards in the classroom setting. Write a sentence to a smart board and it first understands the sentence, and then translates it in to different languages. You can save what is written on the smart board that day and open them again. Opening an image or graphic about the class topic is also usual thing and it helps students understand better (Panjwani et.al 9). Smart boards have enhanced teacher to teacher collaboration across same schools or in different districts. Notes that are saved in smart boards can be shared across the board for content analysis and discussion. Traditional teaching models require teachers to meet in board rooms and use notebooks to present their cases. This is a tiresome affair as it involves the cost of reproducing the notes for all the teaching staff to have copies. With the use of electronic readers and smart boards, everyone can access notes stored digitally. Lesson plans can be shared among teachers in a department with the touch of a button (Green 19). Smart boards and electronic readers share information between the teacher and students during lessons. This improves the effectiveness of teachers in passing knowledge to the students (Blackboard 9). Newly employed teachers can access information from their mentors, and adapt to their new roles in

Alcohol, caffeine, and nicotine Essay Example for Free

Alcohol, caffeine, and nicotine Essay Antecedents I woke up a little late so I was worried about the things I have to do for the day. I decided to have coffee for breakfast, nothing else as I was rushing to call a friend who is expecting my call that morning. Towards lunch time, I was thirsty and I thought a can of soda would be great. I grabbed one and finished it in no time. Consequences I had coffee and soda because I was rushing when I was having my breakfast, and coffee is the quickest that I can get. Also, I know it can perk me up. I got another dose of caffeine through the soda I drank, which is sort of a feel-good drink for me. DAY 2 (Tuesday) Antecedents It was a relaxed day, nothing much to do. I ate right and did not have coffee today. I did not drink any cola either. I bought bottled water which lasted me through the day so I did not have to buy another can of soda. Consequences There was no caffeine today; no nicotine or alcohol either as I am not a fan of these. I figured if I am relaxed there is less chance for me to have caffeine. Having water available also helps. I felt light and active throughout the day. DAY 3 (Wednesday) Antecedents I met with a friend and he was smoking so I smoked too when I was offered, though I barely finished the whole stick. I also had iced coffee after lunch, to perk me up because I was feeling sleepy but I did not want any hot drinks. Consequences I was dizzy. I was guessing it is because of the cigarette; that I am not used to it especially that brand my friend had that is why it got me dizzy. The coffee helped a lot. As always it perked me up.

Origins of Tissues Macrophages

Origins of Tissues Macrophages Ryan Lewis    Discuss current ideas about the origins of tissue macrophages and whether these origins influence the subsequent functions of macrophage Graphical Abstract Figure Legend: This figure highlights possible tissue macrophage origins and their development pathways. The essay discusses contradicting findings in the literature, involving three different publications; Sheng et al, 2015 (blue pathway), Hoeffel et al, 2015 (red pathway) and Perdiguero et al, 2015 (green pathway) which are shown in the figure. Cell positions relate to the time point they are established during embryonic development. Positions of yolk sac and foetal liver are also related to the times they are developed. Introduction In the late 19th century Ilya Metchnikoff discovered macrophages (Tauber, 2003) and since then our understanding of the immune system and its complexity has progressed to a stage where the macrophage is no longer as simple as was originally depicted by Metchnikoff. Although much more is known about tissue specific macrophages and their functions, the origins of these macrophages are less well understood including how their origins relate to the functions they have within specific tissues. This essay aims to address the current ideas about the origins of tissue macrophages and whether these origins influence the subsequent functions of macrophages. Macrophage Discovery and History As previously mentioned Metchnikoff discovered the macrophage late in the 19th century (Tauber, 2003). Metchnikoff published a paper talking about phagocytic cells he had observed in frogs, he described the phagocytic cells as being involved in host defence but also the clearing of dead and dying cells (Gordon, 2007). Mechnikoff then discovered the presence macrophages in starfish, which dont have a vascular system, which led him to the discovery of tissue-resident macrophages (Gordon, 2007). Metchnikoff received the Nobel prize for his studies on cellular immunity to infection in vertebrates which he shared with Paul Ehrlich who discovered humoral immunity (Gordon, 2007). It took roughly 80 years after Metchnikoffs discovery before the origin of the tissue macrophage was uncovered. It was proposed that tissue macrophages originated from circulating monocytes in the blood (van Furth and Cohn, 1968), this theory has persisted for the last 40 years however from recent studies we know t hat this is not the primary origin of the tissue macrophage. Shortly after the theory that tissue macrophages originated from circulating monocytes was proposed, it was discovered that tissue macrophages and monocytes are heterogenous and their heterogeneity is conserved in humans and mice (Gordon and Taylor, 2005). The discovery of monocyte subsets followed shortly after in 1983, which supported the theory that tissue macrophages originated from circulating monocytes (Yona and Jung, 2009). The theory that tissue macrophages are derived from circulating monocytes has been the prevailing view until very recently partly due to the arrival of advanced techniques including; fate mapping and ionizing radiation. In the last 5-6 years, many definitive publications have redefined our understanding of the origins of tissue macrophages (Epelman et al, 2014). Recent studies have shown that many tissue macrophages are established during embryonic development and continually self-replenish into adulthood independently of any input from circulating monocytes in the blood (Epelman et al, 2014; Ginhoux et al, 2010; Hashimoto et al, 2013; Yona et al, 2013). Tissue Macrophage Heterogeneity and Function Tissue macrophage have a huge degree of heterogeneity which reflects upon the specialization of their functions in different tissues and locations (Gordon and Taylor, 2005). Macrophage heterogeneity is required to ensure the tissue macrophage has the most effective phenotype to tackle its specific microenvironment, this is particularly important in the gut. Tissue macrophages in the gut isolated from the lamina propria have a unique phenotype characterised by high phagocytic and bactericidal activity but very poor production of pro-inflammatory cytokines which makes them perfectly suited to their microenvironment (Gordon and Taylor, 2005). There are many specialised tissue macrophages that have very distinct functions including; osteoclasts in the bone which breakdown bone deposits for bone remodelling, alveolar macrophages (dust cells) in the lung that break down foreign material and pathogens, and microglia in the brain which play a role in neuronal development homeostasis and the recovery from pathology (Boyce et al, 2008; Rubins, 2003; Prinz et al, 2014). The theory that tissue macrophage populations are replenished from circulating monocytes in the blood is somewhat true but the most diverse tissue macrophages such as microglia, alveolar macrophages and osteoclasts are replenished through self-renewal and proliferation (Yona and Jung, 2009). There is a substantial number of studies discussing whether macrophages originating from monocytes in the blood can differentiate into resident tissue macrophages. In most cases the monocyte subset that the macrophage originated from determines its ability to differentiate into a specialized resident tissue macrophage, this is particularly true in the lung as studies have shown only Ly6Clo, not Ly6Chi, monocytes have the ability to differentiate into enchymal lung macrophages (Landsman et al, 2007). In regards to the more complex and specialised alveolar macrophages in the lung, studies have shown that these macrophage s require a parenchymal lung macrophage intermediate (Landsman and Jung, 2007). Circulating monocytes in the blood were long believed to be the origin of specialised tissue macrophages but recent evidence has shown that this is incorrect and proven that many of these tissue macrophage populations are developed long before birth (Epelman et al, 2014). Origins of Tissue Macrophages Macrophages are first observed during embryonic day 6.5 and are produced in the yolk sac during what is termed as primitive haematopoiesis (Epelman et al, 2014). During this early stage in development macrophages are the only immune cell produced due to restricted progenitors in the yolk sac. During embryonic days 8.5 10.5 hematopoietic stem cells (HSCs) emerge from the aorta-gonad meso-nephros (AGM) and give rise to all immune lineages (Epelman et al, 2014). At embryonic day 10.5 HSCs migrate from the AGM to the foetal liver, the foetal liver then becomes the major hematopoietic organ until birth. Only after birth do bone marrow HSCs become the primary progenitors and produce all immune lineages (Orkin and Zon, 2008). Microglia are the only tissue macrophages that are established in the yolk sac and are self-maintained through-out adulthood, all the other tissue macrophages are established from embryonic day 14.5 to birth and either self-maintained by proliferation or replenished b y HSCs in the bone marrow (Ginhoux et al, 2010; Sheng et al, 2015). The arrival of fat-mapping techniques have enabled researchers to precisely track embryonic macrophage populations into adulthood, giving an insight into the relationship between resident tissue macrophages and circulating blood monocytes (Epelman et al, 2014). As previously discussed, microglia are the only tissue macrophage originating from the yolk sac and arise before embryonic day 8 (Ginhoux et al 2010). Fate mapping analysis was used to determine that the origin of microglia was the primitive myeloid precursors in the yolk sac and also proved that microglia are self-maintained independently of any circulating blood monocytes (Ginhoux et al, 2010). There is also evidence that Langerhans cells originate from the yolk sac but only partially (Sheng et al, 2015). The fate mapping study by Sheng proved that microglia and Langerhans cells were the only tissue macrophages that originate from yolk sac precursors and th at most adult tissue macrophages originate from a second wave of haematopoiesis driven by HSCs. (Sheng et al, 2015). The number recent of publications concerning tissue macrophage origins is staggering and is most likely attributed to the arrival of fate mapping techniques. With the large surge of new studies regarding tissue macrophage origins it is important that a clear understanding is generated but this is not always possible with such a complicated subject. Contrasting Studies into Tissue Macrophage Origins There are a few recent studies concerning tissue macrophage origins which are particularly interesting. Sheng (Sheng et al, 2015) arrived at the conclusion that most tissue macrophages originate from HSCs however there are a few publications which contradict Shengs findings. Perdiguero concluded that yolk sac derived erythro-myeloid progenitors, were origin of almost all tissue macrophages which contrasts greatly with Shengs observations. (Perdiguero et al, 2015). Perdiguero also concluded that microglia were derived from erythro-myeloid progenitors rather than primitive yolk sac progenitors that was observed by Sheng, although both do come from the yolk sac (Perdiguero et al, 2015; Sheng et al, 2015). Perdiguero predicted that almost all other tissue macrophages originated from erythro-myeloid progenitors (Perdiguero et al, 2015; Sheng et al, 2015). A study by Hoeffel aligned well with Perdigueros observations but Hoeffel observed that primitive yolk sac progenitors gave rise to mic roglia rather than erythro-myeloid progenitors that was observed by Perdiguero (Hoeffel et al, 2015; Perdiguero et al, 2015). As well as the difference in the development of microglia, Hoeffel predicted that erythro-myeloid progenitors migrated to the foetal liver, giving rise to foetal monocytes which were then responsible for the production of tissue macrophages. (Hoeffel et al, 2015). Each of these 3 examples also propose a separate proposed major path of ontogeny and differentiation to adult tissue macrophage state. Perdiguero proposes erythro-myeloid progenitors from the yolk sac as the major precursor of tissue macrophages, Heoffel proposes erythro-myeloid progenitors from the foetal liver, as foetal monocytes, as the major precursor and, Sheng proposes that HSCs from the foetal liver are the major precursor (Perdiguero et al, 2015; Hoeffel et al, 2015; Sheng et al, 2015; Guinhoux and Guilliams, 2016). Although the observations made by Sheng are profoundly different to those m ade by Perdiguero and Hoeffel it could be down to the fate mapping technique they used. The model they used is not adapted to distinguish between late erythro-myeloid progenitors and foetal HSCs which has clearly effected the conclusion they have come to (Guinhoux and Guilliams, 2016). Although fate mapping has great potential in advancing our knowledge of cellular ontogeny there are certain limitation that come with it and these limitations must be considered when designing experiments and analysing data (Guinhoux and Guilliams, 2016). Do Tissue Macrophage Origins Matter? Determining the origins of tissue macrophages may be valuable for furthering our knowledge and understanding of their development but do their origins have any influence in determining their function? As well as ontogeny, diversity in the functions of tissue macrophages can also be attributed to the local signals received by the macrophages. These local changes can drive the expression of unique transcription factors which in turn lead to different functions (Lavin et al, 2015). There is a lot of evidence to suggest that the tissue macrophages microenvironment can alter its function, the plasticity of tissue macrophages allows them to adjust their functions to inflammatory events (Lavin et al, 2015). Using ionizing radiation most embryonic-derived tissue macrophages can be eliminated, they can then be replaced with donor-derived bone marrow progenitors to determine if the wild type state of the tissue can be restored. Using this technique, studies have proven that bone marrow progeni tors can completely restore the enhancer profile and transcriptional programme of the embryonic-derived tissue macrophages that were eliminated (Lavin et al, 2015). A very recent study has shown that yolk sac macrophages, foetal liver monocytes and adult bone marrow monocytes can all successfully differentiate into alveolar macrophages in the lung after the removal of the native alveolar macrophages using ionizing radiation (van de Laar et al, 2016). The study also showed that other already developed tissue macrophages, liver, peritoneal and colon macrophages cannot successfully differentiate into alveolar macrophages in the lung. This finding suggests that the plasticity of the mononuclear phagocyte system is at its largest during the precursor stage and after differentiation to tissue-resident macrophages no further phenotypic changes of macrophage types can take place (van de Laar, 2016). Perhaps the most interesting finding from this study is that the alveolar macrophages differ entiated from yolk sac macrophages, foetal liver monocytes and bone marrow monocytes were still able to self-maintain and prevent alveolar proteinosis (van de Laar, 2016). Similar results have also been observed with Kupffer cells. Kupffer cells were eliminated from the liver using diphtheria toxin-mediated depletion allowing its niche to become vacant. Observations showed that circulating monocytes can engraft the liver and adopt the transcriptional profile of the eliminated Kupffer cells and also become long-living self-renewing cells like their eliminated counterparts (Scott et al, 2015). These new findings question whether the origin of tissue macrophages is truly important to their function as the progenitors and monocytes tested have all been able to restore the tissues lost macrophages successfully without any loss of function. Conclusion Although determining the origins of tissue macrophages and other members of the immune system is important for the progression of our knowledge it remains to be seen whether the actual origins have any implications on the function of the tissue macrophages. The techniques used in the publications discussed are still very new and still require refinement, I believe further refinement of the techniques will enable a more detailed and accurate description on the origins of tissue macrophages and the role the origins play in their function. References       BOYCE, B.F., YAO, Z. XING, L. 2009Osteoclasts have multiple roles in bone addition to bone resorption.Critical Reviews in Eukaryotic Gene Expression, 19.3, 171-180 EPELMAN, S., LAVINE, K.J. RANDOLPH, G.J. 2014Origin and functions of tissue macrophages.Immunity, 41.1, 21-35 GINHOUX, F., GRETER, M., LEBOEUF, M., NANDI, S., SEE, P., GOKHAN, S., MEHLER, M.F., CONWAY, S.J., GUAN NG, L., STANLEY, E.R., SAMOKHVALOV, I.M. MERAD, M. 2010Fate mapping analysis reveals that adult microglia derive from primitive macrophages.Science, 330.6005, 841-845 GUINHOUX, F. GUILLIAMS 2016Tissue-resident macrophage ontogeny and homeostasis.Immunity, 44.3, 439-449 GORDON, S. 2007The macrophage: past, present and future.European Journal of Immunology, 37, 9-17 GORDON, S. TAYLOR, P.R. 2005Monocyte and macrophage heterogeneity.Nature Reviews: Immunology, 5.12, 953-964 HASHIMOTO, D., CHOW, A., NOIZAT, C., TEO, P., BEASLEY, M.B., LEBOEUF, M., BECKER, C.D., SEE, P., PRICE, J., LUCAS, D., GRETER, M., MORTHA, A., BOYER, S.W., FORSBERG, E.C., TANAKA, M., VAN ROOIJEN, N., GARCIA-SASTRE, A., STANLEY, E.R., GINHOUX, F., FRENETTE, P.S. MERAD, M. 2013Tissue-resident macrophages self-maintain locally throughout adult life with minimal contribution from circulating monocytes.Immunity, 38.4, 792-804 HOEFFEL, G., CHEN, J., LAVIN, Y., LOW, D., ALMEIDA, F.F., SEE, P., BEAUDIN, A.E., LUM, J., LOW, I., FORSBERG, E.C, POIDINGER, M., ZOLEZZI, F., LARBI, A., NG, L.G., CHAN, J.K., GRETER, J.K., BECHER, B., SAMOKHVALOV, I.M., MERAD, M. GINHOUX, F. 2015C-Myb(+) erythro-myeloid progenitor-derived fetal monocytes give rise to adult tissue-resident macrophages.Immunity, 42.4, 665-678 LANDSMAN, L., VAROL, C. JUNG, S. 2007Distinct differentiation potential of blood monocyte subsets in the lung. Journal of Immunology, 178.4, 2000-2007 LANDSMAN, L. JUNG, S. 2007Lung macrophages serve as obligatory intermediate between blood monocytes and alveolar macrophages.Journal of Immunology, 179.6, 3488-3494 LAVIN, Y., MORTHA, A., RAHMAN, A. MERAD, M. 2016Regulation of macrophage development and function in peripheral tissues.Nature Reviews: Immunology, 15.12, 731-744 ORKIN, S.H. ZON, L.I. 2008Haematopoiesis: an evolving paradigm for stem cell biology.Cell, 132, 631-644 PERDIGUERO, E.G., KLAPPROTH, K., SCHULZ, C., BUSCH, K., AZZONI, E., CROZET, L., GARNER, H., TROUILLET, C., DE BRUIJN, M.F., GEISSMANN, F. RODEWALD, H.R. 2014Tissue-resident macrophages originate from yolk-sac-derived erythro-myeloid progenitors.Nature, 518, 547-551 PRINZ, M., TAY, T.L., WOLF, Y. JUNG, S. 2014Microglia: unique and common features with other tissue macrophages.Acta Neuropathologica, 128.3, 319-331 RUBINS, J.B. 2003Alveolar macrophages: wielding the double-edged sword of inflammation.American Journal of Respiratory and Critical Care Medicine, 167.2, 103-104 SCOTT, C.L., ZHENG, F., DE BAETSELIER, P., MARTENS, L., SAEYS, Y., DE PRIJCK, S., LIPPENS, S., ABELS, C., SCHOONOOGHE, S., RAES, G., DEVOOGDT, N., LAMBRECHT, B.N., BESCHIN, A. GUILLIAMS, M. 2016Bone marrow-derived monocytes give rise to self-renewing and fully differentiated Kupffer cells.Nature Communications, 7, 10321 SHENG, J., RUEDL, C. KARJALAINEN, K. 2015Most tissue-resident macrophages except microglia are derived from fetal hematopoietic stem cells.Immunity, 43.2, 382-393 TAUBER, A.I. 2003Metchnikoff and the phagocytosis theory.Nature Reviews: Molecular Cell Biology, 4, 897-901 VAN DE LAAR, L., SAELENS, W., DE PRIJCK, S., MARTENS, L., SCOTT, C.L., VAN ISTERDAEL, G., HOFFMANN, E., BEYAERT, R., SAEYS, Y., LAMBRECHT, B.N. GUILLIAMS, M. 2016Yolk sac macrophages, fetal liver, and adult monocytes can colonize an empty niche and develop into functional tissue-resident macrophages.Immunity, 44.4, 755-768 VAN FURTH, R. COHN, Z.A. 1968The origin and kinetics of mononuclear phagocytes.The Journal of Experimental Medicine, 128.3, 415-435 YONA, S., KIM, K.W., WOLF, Y., MILDNER, A., VAROL, D., BRECKER, M., STRAUSS-AYALI, D., VIUKOV, S., GUILLIAMS, M., MISHARIN, A., HUME, D.A., PERLMAN, H., MALISSEN, B., ZELZER, E. JUNG, S. 2013Fate mapping reveals origins and dynamics of monocytes and tissue macrophages under homeostasis.Immunity, 38.1, 79-91 YONA, S. JUNG, S. 2009Monocytes: subsets, origins, fates, and functions. Current Opinion in Hematology, 17.1, 53-59

Anysys Fluent Simulation Of Turbulent Flow Engineering Essay

Anysys Fluent Simulation Of Turbulent Flow Engineering Essay The characteristics of fluid flow with sudden expansion in a 1:2 diameter ratio pipe are investigated using ANSYS Fluent. Results show fluid re-circulates just after expansion, length of recirculation zone approximates to 0.35m. Velocity, turbulence intensity and pressure vary along pipe length in accordance with Bernoullis principle. Influence of change in turbulence models on accuracy is also investigated with the Reynolds Stress model providing the relatively best fit although other turbulence models (realizable k-ÃŽÂ µ and SST k-à Ã¢â‚¬ °) provide reasonably close fitting models. Results were checked for mesh independence and validated. Computational Fluid dynamics (CFD) involves computational simulation of fluid flows in different situations employing numerical solution of basic flow equations e.g. the continuity equation and other equations over a discretized unit reference (Versteeg, and Malalasekera, 2007). The usage of CFD transcends the traditional scope of chemical engineering profession into wider areas such as oceanography, biomedical engineering electrical circuitry, etc (Fairweather, 2011). Sudden expansion in pipes involves fluid flow from a smaller hydraulic diameter to a larger one. Flow separation usually occurs in a sudden expansion scenario, where a part of the fluid flows in opposition to the main fluid flow. This are called eddies, and are strong contributors to the irreversibility of practical flows as energy is dissipated by this eddies. Thus it is of great significance to be able to model eddies in a sudden expansion flow adequately and observe the characteristics of this recirculation zone (efluids, 2011; Gharegbagi and Ali, 2011; Mahmud, 2011: Roy, et al 2010). Sudden expansion is a simple looking but intriguing case of fluid flow in pipes. Sanmiguel-Rojas (2010) implies that not many significant studies have been done on instabilities encountered in steady, turbulent, sudden expansion fluid flow with respect to spatial structure of piping with D2/D1 = 2. However, previous remarkable work in this field includes Roy, et al (2010) and Mansoori and Bazargan-Lari (2007). Examples of scenarios in which the above phenomenon occurs include; Flows into a tank, oil drilling and extraction, plug flow reactors, combustion engines, aerodynamics, etc. Software ANSYS Fluent is a commercial CFD package that models flow via the finite-volume method (a variation of the finite difference method) created by the company Fluent (now part of ANSYS Inc.). Pre-processing of the case study (meshing) was done on Gambit which comes along with Fluent (now ICEM). The version of Fluent employed in this report is 12.1 (CFD-online, 2011; Weidner, 2011; ANSYS, 2009). This report covers the Reynolds Average Navier-Stokes (RANS) modelling of turbulent flow with sudden expansion in a 1: 2 diameter piping, using the pressure based solver and the second order upwind difference scheme in ANSYS Fluent. Effects of changes in turbulence models on computational time, and accuracy would be examined, visual plots would be used to describe and analyse modelling results. SIMULATION METHODOLOGY Fig 1: diagrammatic representation of simulation process (Fairweather, 2011) Nature of Fluid flow under consideration Calculating the Reynolds number of the flow helps to determine the nature of the flow. At Normal Temperature and pressure (P = 101.325 kgm-2, T = 288.16 K) Generally it is accepted that flows with a Reynolds number (Re) > 4000 are turbulent in nature. Therefore it is established that the flow under consideration is a turbulent flow Reynolds-Averaged Navier Stokes (RANS) RANS involves the time averaging of the equations that govern turbulent fluid flow to capture information on variations that occur on a minute scale while avoiding horrendously lengthy computation times. RANS represents variations as a mean such that ; ; ; and P RANS is employed in obtaining the equations that were numerically solved in this report assuming constant velocity and viscous flows (Fairweather, 2011). Geometry: The geometry consists of two pipes of diameter ratio 1:2 joined together through which fluid flows with no bends as shown below Fig 2: geometry of pipe showing mesh grid/mesh discretization Governing Equations Continuity equation: Momentum equation (x-direction only) Where:; ; ; ; ; ; TURBULENCE MODELS Realizable k-ÃŽÂ µ model The k-ÃŽÂ µ model is a two equation model that assumes a linear relationship between Reynolds stress and rate of strain. It has the advantages of fast computation time, wide usage and extensive validation. However, it predicts badly the length of eddies for complex flows. The realizable k-ÃŽÂ µ model is an update to the model based on observed strengths and weaknesses of the standard k-ÃŽÂ µ model (Fairweather, 2011; ANSYS, 2009). Below is a mathematical representation of the standard k-ÃŽÂ µ model Where: ÃŽÂ ¦ = k or ÃŽÂ µ; SÃŽÂ ¦=source term for k or ÃŽÂ µ; Sk= G-à Ã‚ ÃƒÅ½Ã‚ µ (production rate of k-destruction rate of k); SÃŽÂ µ= (C1G-C2à Ã‚ ÃƒÅ½Ã‚ µ)(ÃŽÂ µ/k) = (production rate of k-destruction rate of k) ; N.B. for this simulation: ; and SST k-à Ã¢â‚¬ ° model The k-à Ã¢â‚¬ ° model is also a two equation model based on the Wilcox k-à Ã¢â‚¬ ° model. It is suitable for wall bounded flows and free shear flows as it performs low Reynolds number corrections, computation time is relatively fast and accuracy is better than the k-ÃŽÂ µ model in most cases. à Ã¢â‚¬ ° is specific dissipation rate and is analogous to a ratio of ÃŽÂ µ/k. The SST k-à Ã¢â‚¬ ° model is an improved version of the standard k-à Ã¢â‚¬ ° model (ANYSYS, 2009). Reynolds Stress Model This is a very rigorous model, with seven equations unlike the preceding 2-equation models. It provides more accuracy where other models are faulty e.g. impinging flows and can predict fluid flow for a lot of cases closely without any dedicated / individual adjustments. However, computing costs are large (Fairweather, 2011) The first six equations of the RSM model can be condensed into the equation below Where: ; ; ; The seventh equation (turbulence dissipation rate) is N.B. in this simulation: ; and Numerical methods The discretization employed is the finite volume method. It is a variant of the finite difference method. This scheme splits up the domain into discrete control volumes over which the control equations are resolved using a truncated Taylor series expansion. Finite volume method is the most established of Discretization schemes in CFD modelling. Convective fluxes were evaluated with the second order upwind-difference scheme (Fairweather, 2011; Versteeg, and Malalasekera, 2007). Boundary conditions Table 1: boundary conditions for numeric solution (adapted from Versteeg, and Malalasekera, 2007) Realizable k- ÃŽÂ µ model SST k-à Ã¢â‚¬ ° model Reynold Stress model Inlet k = 0.01148438 m2s-2 ÃŽÂ µ = 0.02888982 m2s-3 k = 0.1148438 m2s-2 à Ã¢â‚¬ °= 27.95085 Rij = ÃŽÂ µ = Outlet ; ; ; Interior k = 0 ; ÃŽÂ µ = 0 k = 0 ; à Ã¢â‚¬ ° = 0 Rij = 0 ; ÃŽÂ µ = 0 Walls law of the wall Law of the wall Wall functions Convergence criteria and levels For all the equations solved by each model, a uniform convergence criterion of 1.0 x 10-4 was used for every equation solved. The value represented an informed compromise between acceptable accuracy and realistic computation time (ANYSYS, 2009). It is worthy of note that for the RSM model, this relatively stringent criterion caused the number of iterations to exceed 14,000 without any obvious improvement in results as shown in fig 2. Therefore a cap of 4,000 iterations was placed on the RSM calculations. Results show there was no ensuing negative impact on accuracy of numerical solution. Fig 3: Iteration length for RSM model showing Mesh Independence test The table below shows that results from the modelling experiment are similar and essentially the same within three (3) decimal places of precision irrespective of mesh size employed. Also since assurance of mesh independence cannot be guaranteed by mere reduction in cell size (Sloan et al, 1986), an attempt was made at adaptive meshing to attenuate important flow variations and phenomenon with the same results obtained. Table 2: Grid/Mesh independence of simulation Gambit Mesh/Grid size Volume of unit cells Mass flow rate at inlet [kgs-1] Mass flow rate at Pressure-outlet [kgs-1] Error Percentage Difference (%) 5 439,993 0.016809944 0.016809996 -5.22E-08 3.09 x 10-4 7 163,311 0.01678467 0.016784551 1.19E-07 7.08 x 10-4 10 55,182 0.016728994 0.016729204 2.1E-07 1.255 x 10-3 10b 100,693 0.016728994 0.016728895 -9.9E-08 5.9 x 10-4 15 16,750 0.016609019 0.016608695 -3.24E-07 1.95 x 10-3 N.B. 10 b means mesh size 10 with boundary layer mesh added (adaptive meshing) Grid optimization (Mesh finesse Vs Time trade off) The greater the volume of unit cells in grid per geometry, the better the accuracy of numeric analysis. However, within the scope of grid independence, results are relatively uniform irrespective of mesh size. The cost of finesse of grid is computation time could be noticed with the case of mesh size 5 (439,993 cells) which took almost forever to compute using the RSM model and had to be terminated. Thus mesh 10 (55,182 cells) and 10b (100,693 cells) were employed for analysis with other mesh sizes serving as validation checks RESULTS AND ANALYSIS Part 1 Taking a close look at flow close to the walls of the pipe, we see the effect of sudden expansion resulting in backflow of fluid creating velocities in the opposite direction (red box). Recirculation zone is approximately 0.37m in length. We also can see how the fluid adjust to changes in geometry with a sharp rise velocity to fill the voids created by liquid moving backwards then a gradual decrease as pressure pile us towards the exit of the pipe Fig 4: velocity variation along length of pipe close to the walls showing effects of recirculation Fig 6 shows the variation in turbulence intensity. It can be seen that the flow becomes more turbulent around the recirculation zone with dead (stagnant) flow occurring just at the corners of the pipe. Fig 7: displays the total pressure variations in the pipe. It can be noted that sudden expansion causes a drop in total fluid pressure. Fig 8 shows the radial velocity and profile. It can be noted that velocity variation in the radial direction is minimal, which is typical of plug fluid flow depicted by fig 5. Fig 9 is a streamline plot of axial velocity, velocity variation along the axial direction is more dominant than in the radial direction, also worthy of note is the length of the recirculation zone (black box) and the reattachment zone. Fig 5: stages of flow development at different positions on pipe length Fig 6: Turbulence intensity profile of fluid along length of pipe Fig 7: Total pressure profile of fluid along length of pipe Fig 8: Radial velocity profile of fluid Fig 9: streamline plot of axial velocity of fluid Part 2 Fig10(a-c) shows axial velocity profiles for different turbulent models in order of increasing complexity (realizable k-ÃŽÂ µ à ¢Ã… ¸Ã‚ ¶ SST k-à Ã¢â‚¬ ° à ¢Ã… ¸Ã‚ ¶ RSM). Curves get smother showing a more gradual response of the fluid to changes and also approach exact solution, as model complexity increases. However, all the essential features of the fluid flow are well represented by all models. Fig 11(a-c) displays turbulence intensity variations, more variation details are captured as model increases in complexity. Worthy of note is that the SST k-à Ã¢â‚¬ ° model provides a more detailed picture of turbulent intensity variation in reference to the other models picking up intensities as low as 5.42 x 10-5 %, while the realizable k-ÃŽÂ µ picks up a minimum of 0.336% and RSM 1.45% Fig 12(a-c) shows streamline plot of axial velocity, though length of recirculation zone remains approximately the same the representation of velocity magnitude in recirculation zone varies visibly for each model. Fig 13(a-c) is the radial velocity profile; the SST model indicates larger radial velocities along pipe length than both than both the realizable k-ÃŽÂ µ and the RSM models. For all models radial velocity variation is dominated by axial velocity variations Fig 10a: k-ÃŽÂ µ model Fig 10b: SST model Fig 10c: RSM model Fig 11a: k-ÃŽÂ µ model Fig 11c: RSM model Fig 11b: SST model Fig 12a: k-ÃŽÂ µ model Fig 12b: SST model Fig 12c: RSM model Fig 13a: k-ÃŽÂ µ model Fig 13b: SST model Fig 13c: RSM model VALIDATION OF RESULTS For CFD, convergence of numerical iterations does not really count for much as Versteeg and Malalasekra (2007) put it results are at best as good as the physics embodied in it, or at worst as good as the skill of the operator. Thus, validation of results becomes extremely important. The results obtained herein would be validated thus: Bernoullis equation For an ideal fluid flow Bernoullis equation enables us to calculate the velocity at any point in the pipe (assuming constant flow rate, and negligible friction losses). Therefore we can validate output velocity from fluent using this principle (Roymech, 2011). Where vin = 1.73855 ms-1, P1= 101.325 kgm-2, P2= 101.325 kgm-2, g = 9.81 ms-2; à Ã‚  =1.225 kgm-3; z1 = 0.1m; z2 = 0.1m; Therefore Mass flux variation results from Fluent The third mechanism for validation will be the CFD package fluent itself. Analysis of the computation results as presented in table 4.0, show that value of errors resulting residuals is very low (less than 0.0095%) indicating conservation of mass during numerical calculations which lend credit to suitability and accuracy of model. Table 3: comparison of percentage error of each model MODEL/mesh volume K-EPSILON (%) SST K-OMEGA (%) REYNOLD STRESS (%) 5 0.000309 0.00352 N/A 7 0.000708 0.004468363 0.000673233 10 0.001255 0.007867 0.001124 10 b 0.000153 0.00258 0.001488 15 0.00195 0.000783 0.00927 N.B. 10 b means mesh size 10 with boundary layer mesh added Research journals In addition to the above validation processes, the results of modelling experiment reported in this work were compared with previous research works such as (Roy, et al 2010), (Mansoori and Bazargan-Lai 2007) and (Teyssandiert, 1973). Results obtained corroborated foregoing analysis and results obtained it the above mentioned papers. CONCLUSION In summary, CFD modelling of sudden expansion flow in a 1:2 diameter ratio piping posses the following characteristics. Sudden expansion in pipe flow results in local pressure losses Flow fully develops into plug flow before exit at outlet and majority of the variations occur axially along reactor length Recirculation of fluid occurs after sudden expansion for a lengthspan of approximately 0.35m along pipe Viscous effects along wall boundaries help dissipate energy of turbulent eddies The realizable k-ÃŽÂ µ model predicts the size and strength of recirculation zone poorly, but as flow develops into plug flow, the models accuracy remarkably improves with reference to the other models tested. Turbulence models become better with increase in complexity of model from k-ÃŽÂ µ to SST k-à Ã¢â‚¬ ° to RSM. Ability of other models to better the k-ÃŽÂ µ model in recirculation zone prediction can be attributed to embedded corrections for boundary layer flow, turbulent kinetic energy and dissipation rates.

Essay --

There are advantages and disadvantages of experiencing childhood in the military. For instance, the effects of separations and reunions with families and friends. Many people report difficulty in identifying where they belong due to a lifestyle of constantly moving, being wrapped up in the military lifestyle as well as foreign cultures. Rather than the regular person society of their local terrains, while growing up numerous military families frequently feel like outcasts in association with the citizen society of their local grounds. Moving frequently can have unexpected benefits too, such as experiencing and appreciating the diversity in our world, making lots of new friends, and sometimes finding out where you belong or want to reside. The point when a kid has a challenging time conforming to another circumstance, if it’s a parent deploying or a move to another area, it can prompt uneasiness, misery and behavior issues. Some children might not have a behavioral disorder, but their behavioral problems cause these difficulties. Even infants and toddlers can experience difficulti...

Tay-Sachs :: science

Tay-Sachs The genetic disorder I have looked at in this scientific statement is Tay-Sachs disease or TSD, a serious, inherited fatal brain disorder. The disease is named after Warren Tay, a British ophthalmologist who first described the disease in 1881 and a New York neurologist, Bernard Sachs; who first described the cellular changes and the genetic nature of the disease in 1887. This rare hereditary disease is caused by a genetic mutation that leaves the body unable to produce an enzyme; a protein that speeds up the rate at which chemical reactions take place within the body. The enzyme is necessary for nerve cells to metabolise fat, (allow for chemical reactions to take place within the cell) . The enzyme involved in TSD is known as hexosaminidase A. its absence allows a lipid called GM2 ganglioside to build up in the brain, destroying the nerve cells. The location of the gene HEXA that causes the genetic disorder is 15q23-q24. Tay-Sachs is an autosomal recessive disorder. My research indicates that a person must have two carriers as parents for the disease to occur. Carriers, people with only one gene for the disorder are physically unaffected due to it being recessive. When both parents are carriers, each child has a 25% or  ¼ chance of obtaining the disease. If only one parent is a carrier, there is no chance that the child will get the disease, but there is a 50% chance that the child will be a carrier. My extensive research has concluded that the symptoms of the disease are: ï  ¶ Blindness ï  ¶ Dementia ï  ¶ Deafness ï  ¶ Seizures ï  ¶ Paralysis All these symptoms appear during the first six months of life following the case studies data. The disease progresses rapidly, usually killing affected children by age three. As the damage to the nervous system progresses, an inability to swallow, difficulty in breathing and mental retardation develop. In late-onset TSD, which occurs in people who have a genetic mutation (A permanent change in the DNA sequence due to an insertion, deletion or an alteration) that is similar to that of TSD that occurs in young children. Some production of the missing enzyme occurs and life expectancy does not seem to be affected according to my research. Medical treatment is focused mainly on managing the symptoms of late onset TSD, Anticonvulsants can be prescribed to patients with seizures and antidepressants can be used as to help with psychiatric symptoms.

Child/ parent relationship in the Little Boy Crying? Essay

The poem, Little Boy Crying, written by Mervyn Morris is mainly about father and sons relationship. Poet shows the two main themes through this relationship; fathers love towards his child and his effort to lead his child into a right world in life. Mervyn Morris explores the child and parents relationship by using second person narration and language techniques such as allusion and emotive words. The important messages behind the poem are: parents love us and they will do anything to lead us to the right way. In the first stanza, the poet describes a boy who is very relaxed at first but he gets very tense with the fathers punishment. Your laughter metamorphosed into howls in the first stanza shows the change of the mood for the boy with his fathers scold. With three year old frustration, your bright eyes swimming tears, splashing your bare feet in the first stanza is described from the fathers view (using second person narrative) and he sees it as a wrong behavior and slaps the boy, causing the boy to tear. But the father does know the sons feelings when he is slapped; it is just the three year old boys emotion. You stand there angling for a moments hint of guilt or sorrow for the quick slap struck, shows that father is hiding his guilt of hitting his child and boy is looking for any evidence that, his father feels guilty for hitting him. This stanza tells the reader that father slapped the boy not with anger but with love to make his boy go to the right direction in life. Stanza two is from the boys point of view. Using allusion, the poet let the boy imagine revenge upon his father. In this stanza, the boy regards his father as a cruel giant who exercises the power over a little boy and revenge in the fairy tale. The ogre towers above you, that grim giant, empty of feeling, a colossal cruel In this stanza shows that boy really hates his father and describes him as a heartless, cruel giant ogre. You imagine chopping clean the tree hes scrambling down or plotting deeper pits to trap him in: the boy imagines himself as Jack in the fairy tale, Jack and the beanstalk, cutting down the beanstalk before the giant ogre, metaphor of his strict father, comes down. In the last stanza, the poet again emphasizes the fathers love toward his son in spite of the sons wrong doing. You cannot understand, not yet, shows that the father loves him very much and he understands what the boy feels. It also shows that father knows his son isnt old enough to understand his fathers intention of the punishment. This fierce man longs to lift you, curb your sadness with piggy back or bull fight, anything/ hidden behind that mask tells us that father may look strict to the boy but he also has a very soft side. However, it seems that disciplining his son takes precedence over showing his love to him in the line, But dare not ruin the lesson you should learn. Again the poet emphasizes that father scolded him to lead him to the right direction. Lastly, the poet adds the last line to highlight the lesson hed like to teach his son; You must not make a plaything of the rain. It shows why he goes hard on his son. As most parents do, he wants his son to grow up as a decent person and to give his son the lesson; You shouldnt play with the rain, that is, tear because the tear cannot always be the answer. In conclusion, Mervyn Morris explores child and parents relationship using second person narration and imagery. The poem shows the fathers endless love towards his child and his efforts to lead him to the right direction in life. The poem leaves another important message through the relationship between the father and the son; we should always appreciate our parents, who are always there for us when we need help, not only with giving love to us but also with disciplining us. Source: Songs of our selves-IGCSE poetry anthology

History of Typography Essay

First of all, what is typography? Typography is the art of letter forms being organized into certain words or sentences. Typography came from the Greek word typos which means form and graphe which means writing. Most people would agree that a German man named Johannes Guttenberg was the one who invented typography. Before Guttenberg, everything had to be scribed by hand which was very time consuming. Guttenberg also created blackletter, the first ever typeface. Since blackletter looked very compact, a man named Nicolas Jensen invented the first ever Roman typeface during the 15th century. Since Jensen’s typeface was made of straight lines and regular curves, it was easier to be read compared to the blackletter typeface. After Roman letters, the italics typeface was created during the late 15th century by Aldus Manutius. During the 18th century, a man named William Caslon created a typeface called Old Style. A few decades later, John Baskerville created a variety of typeface which is now called Transitional. A few years later, a French man named Didot and an Italian man named Bodoni created typefaces that are classified as Modern. During the second industrial revolution, advertising needed new typefaces. Letters got taller, wider, and even weirder. Since the typefaces during the 19th century were so complex, the early 20th century brought something simple. A man named Paul Renner from Germany created a typeface called Futura which was based on simple geometric shapes. In 1957, Helvetica was introduced. Some would call this the world’s most favorite typeface. The world of typography changed with the introduction of the computer – and it will continue improving since technology is constantly improving too.

Vietnam: A Three-Day Tour

Among many beautiful places in the East, Vietnam is one of the must-see countries. Setting foot in this country provides an unforgettable experience.The historic temples, serene beaches, and peaceful countryside are what tourists find most enigmatic. Even the overly populated markets in the country provide travelers with an unforgettable and exciting experience. The sceneries and warmth of the people provide visitors a taste of the local culture and a perception of Asians in general.Vietnam is located in the Southeast Asia, bordering the Gulfs of Thailand and Tonkin, and South China Sea. It is alongside China, Laos, and Cambodia, and very near Thailand so tourists can easily find trips to neighboring countries after enjoying their tour of Vietnam. At present, Vietnam’s population has grown to almost 85 million in 2008 (Population Council).Most people associate Vietnam with wars possibly due to films that feature the Vietnam War. However, Vietnam is more than what we see in fil ms. Contrary to the what others believe regarding the Viet Kong, Vietnamese are peace-loving and warm-hearted people. They are called Vietnamese, which is similar to the official language.There are around 50 tribes which include the Kinh (also known as Viet) who make up the majority of the population, the Tay, Thai, Muong, Khome, Hoa, Nun, Hmong, and others. Aside from the Vietnamese language, English is becoming a popular language especially among the younger people. Some can speak French, Chinese, and Kmer while dialects among the natives in the mountain areas include Mon-Khmer and Malayo-Polynesian.When planning to visit Vietnam, most visitors need to apply for a tourist visa in advance. Vietnamese visa is inexpensive at the rate of USD 40-80 when applying directly to the Embassy. Another way to apply for visa is upon arrival in Hanoi, but this requires a pre-arranged application with the Hanoi Immigration Department. To do away from the hassles, it is recommended to obtain visa a week or two before the trip.Throughout the country the average temperature is between 21 and 23 degrees Celsius. During summer, the average temperature is 28 degrees Celsius. Rainy season starts from May and it ends in October. At its peak, some lowlands are affected by flood, so it is best to visit either in summer or autumn.If one wants to witness the rich culture of the Vietnamese, the best time is during the traditional Vietnamese Tet (Lunar New Year). Tet is a week long festival and is the most important festival of the year usually every last week or January or early February.As expected, prices during this time are raised radically, and most of the locals are on holiday so business is typically paralyzed, with some hotels, transportation companies and restaurants closed down. Therefore, those who prefer to travel around this period should have a well-organized trip with a tourist company. Otherwise, it will be difficult to go around without a good companion.When making a sh ort visit to Vietnam, visitors have at least three choices. For those who love the city, the best place to go is Ho Chi Minh (formerly known as Saigon). There, one will experience Asian nightlife at its best. Those who are after relaxation and peace must see Hanoi and Halong Bay; while those who are after adventure and exploring nature should try Sapa and Mekong Delta River.

Fahrenheit 451 Christ Figure Essay

If any character in the novel represents a Christ figure it has to be Montag. Even though he does not share all the same traits as Christ that does not mean that he is not a Christ figure. Traits of Christ that are applicable to Montag is that he’s around his 30’s, self-sacrificing, good with children, came to redeem an unworthy world, in agony, in a way is unmarried, and is in a type of wilderness with an encounter with the devil. Just like Christ, Montag was sacrificing himself and his life to redeem his society of its unworthiness. For example even though many were opposed to him, thought he was crazy, and wanted him under control, he knew what was right for the people by sacrificing his own life to try to get more books printed for them. He is good with children such as Clarisse (even though she’s not typically a child but an adolescent) by not treating her as if she’s an inferior but like as a friend; which is not how most adult figures in this novel would treat her. Montag himself is in pure agony, even though he may not be physically but mentally. His soul is in torment with so much unanswered to him and he feels the only way to redeem it is through books which holds such vast amounts of information. Even though he is supposedly ‘married’ to Mildred they do not even have love and compassion for one another, just only making them seem like housemates sharing a home. One can assume that his own town can be seen as a wilderness and that the mechanical hound could be seen as the devil. The mechanical hound could be seen as the devil for it shows no sign of positivity but negativity. For example all the hound is programed to do is kill and torture people like Montag, or in this instance Christ. There are some ways Montag could be in opposition of representing a Christ figure such as killing Captain Beatty, but he being a Christ figure does not mean you have to represent Christ in every aspect. It could be seen as more favorable that Montag does represent a Christ figure depending on the viewpoint one choses to look at through.

Critical analysis of safeguarding children Essay

A. Critical analysis of safeguarding children including legislation, policy and professional practice (4000 word – 100%): United Nations Convention on the Rights of the child (UNCR 1989), Article 1 defines a ‘child’ as a person below the age of 18. Law is used in order to legitimise society; children are deeply and permanently affected by the laws that are made and enforced by adults. Safeguarding and promoting the welfare of the children is based on â€Å"_protecting, preventing and ensure safety_† towards children, (Reference). Within society there are many professionals and agencies operated in order to protect and reinforce children’s rights. The language of safeguarding children came about with the advent of The Children Act 1989. The Children’s Act (1989) and (2004) are also legislation which states that those who work with children have priority to keep them safe. The Children’s Act 2004 focuses more on ‘integrating services around meeting the needs of children and their families’, which resulted in professionals working more closely together (DfES, 2004a). Measures which also are seen to be protecting the interests of the child, would be the European Convention on Human Rights and the United Convention on the Rights of the Child are seen to in-fact have ‘limited impact’ focusing less on the actual rights of the child and more on parental rights in respect of their children’s education (Blythe and Parkin, 1999, p. 118). Although children do not have any say in who will govern them, it is seen as essential for children to be protected within this integrated system we live in. Although professionals have the duty of the protection of children â€Å"_everyone who comes into contact with children and families has a role to play_†, any organisation or agency can work together in order to provide consistent support towards children (Web ref 1). Before moving forward with this essay it is important to establish the professional practice and case which will be used to analyse the child protection of children within the United Kingdom. The parental responsibility under the Children’s Act 1989 S3 (1) is defined as having ‘responsibilities’ rather than ‘rights’ in relation to children. However there have been many cases where the parents/career of child has been questioned. Social workers are called to look at the case, the duty of a  local authority social worker especially in the Children’s Act 1989 S17 (1) is seen to be a duty to investigate when there is cause to suspect that a child may be suffering or has been harmed. Social workers are going to be the focus in this essay in terms of professionals used to protect children and Victoria Climbià © case will also be the focus. Read Also:  Examples of Critical Analysis Essay Writing Social workers are seen as â€Å"mediators, aggressive intervener, interpreters and provider/ locator/ creator of resources in terms of the client’s needs†, in terms of roles which are played (Hollis, 1964). Most times dealing with social workers are not always at the request of the client, child protection is not the only option they also deal with â€Å"compulsory admission to mental health care and at the order of the criminal courts† (Lindsay, 2013, p. 2). Over the years, the complexity of work for practitioners advanced, which created _structural and organisational changes_ (web ref 2). After several years, the government therefore decided to use their agenda for children’s services onto the case of Victoria Climbià © (Laming, 2003). This essay will be based on the analysis of the safeguarding and protection of children and the issues which may come about doing so. Focusing on the work of Social workers in terms of child protection and how the effect ive safeguarding was lacked in the case of Victoria Climbià © (2000). The death of Victoria Climbià © came about in February 2000, aged eight years and three months; her abuse by her great aunt Marie-Therese Kouao and Kouao partner, Carl John Manning, was unknown although she had been seen by many different practitioners including health, police and social workers over the last ten months of her life. Her death sparked an influential inquiry into professional and policy failure which proved negative amongst children’s services, however promoted a change in publications and legislation within the UK as this case has created an overhaul to child protection procedures. As a result of the death of Victoria, Lord Laming highlighted in his evaluation of the professional practices surrounding Victoria’s case the importance of child services working and sharing information in order to protect children and protect them from harm. In his diagnostics of the ‘professional and systematic’ failures which contributed to Victoria’s death including many actors who failed to identify the abuse Victoria went  through. His report published in 2003, recommended 108 changes in which most of them being adapted into the Children Act 2004, as well as the creation of the 2003 green paper Every Child Matters. The professional role of social workers will be analysed critically in collaboratively working to safeguard children. Under the Children Act 1989 and Children Act 2004 practitioners have the responsibility to ‘_Safeguard and promote the welfare of children who are in need’_ as they help prevent children from being in a vulnerable state by a career who can no longer or should not be looking after them. Within the Victoria Climbià © case, social workers were described as â€Å"incompetent† (web ref 3). It was found that the main social worker of this case, Lisa Arthurworrey, was responsible for the death of Victoria, for falling to recognise the abuse. However, Arthurworrey claimed that social workers had not received the ‘_correct guidelines’_ from management until after Victoria’s death (Batty, 2004). It is seen that children tend to have better outcomes where there is evidence of careful assessment of their needs. Social workers try to work together with the services provided in order for early intervention. Assessment is seen to be the foundation of all effective intervention, as it establishes the human needs, evidence would need to be grounded. Services are needed to be provided in the situation of risk and need, accurate and realistic assessment from the relevant professional to ensure all the appropriate information of that certain case needs to be undertaken before ‘Judgements and decisions are made about action and resources’ (Adams and Dominelli et al., 2002, p. 209) The safety of a child is paramount with a social workers role, the Children’s Act 1989 centralises this. The act has focused on the importance of assessment of need/risk of the child and focusing on the arrangements of services inter-connecting for the Protection of Children. Policy and legislation has changed over the years regarding safeguarding children as it was seen that before the policies and practices were more concerned with family support welfare (Audit Commission, 1994: Department of Health, 1995). It was seen that the focus was set to be more of a ‘_change_’  of the work, for the result of child welfare approach principles being able to dominate. It was established that the significance being based on supporting children and families within the community and coercive of intervention and policing being kept to a minimum. The enactment of the 1989 Children’s Act shows tension between policy and practice over time When the Act was passed, the pressure on the child protection system had been raising, as well as the number of referrals and children being brought into care. The problems which have been faced before the act was even passed had not been resolved. Inquiries and reports contained details of how professionals surrounding the children had failed to produce a reaction from failure to communicate with one another. The act was enforced to establish the threshold criteria for child protection inquires and to ensure child as centre in terms of court proceedings. At the same time the Act, enforced guidance and important of the birth family and establishing principles for child care practices, working with family and professionals and the importance of working with family and protection of them as well as protecting children from harm (Allen, 2005; Department of Health [Doh], 1989). The safeguarding agenda continued into the 1990’s, introducing agencies and programmes such as Sure Start and the Children’s Fund. Significant legislation continued with Crime and Disorder Act 11998 and the Adoption and Children Act 2002, which policy also developed with the introduction of Framework for _the Assessment of Children in Need and their Families_ (DoH et al., 2000). This was implemented within local authorities in 2001, which establishes guidance about the conduct of assessment prompted on social workers due to the case of Victoria Climbià ©. The safeguarding agenda was later implicated by the Victoria Climbià © case which introduced _Every Child Matters (_ECM) Framework, including the establishment of Local Children’s Safeguarding (Chief Secretary to the Treasury, 2003, para 1.12; Laming 2003). The initiative was introduced as part of Laming’s actions onn the death of Victoria, which involved efforts to ensure that no child is being ignored by improved services, through  shared information within different professionals and these professionals working alongside another which also included the Common Assessment Framework (CAF) – based on renewed measures of tackling social exclusion ensuring each child’s have their voices heard. Victoria horrific death which arose due to the hands of the great aunt and partner reaffirmed the framework which aimed for every young child to have the best chance in life to achieve their full potential. While responding to the death of Victoria, the Green Paper ECM providing ‘thinking and legislative’ framework that would further broaden the scope for prevention and early intervention which was seen to be the central aim of ensuring well-being of all children. This is shown in the outcome statement of ECM (DfES, 2004). Children should achieve economic well being Be health Enjoy and achieve Make a positive contribution Stay safe These categories are far from the narrow visions of how child protection should work from how it was the 1980’s and 1990’s, showing how advanced the agenda has advanced to ensure better services. These aims show the attempts the Government have in order to achieve a more proactive and guarding service for children and families. However even with this in place, it is seen that the agenda within the UK can be seen to be wavered in terms of the ‘local implantation failure’ within society as Victoria Climbe case demonstrates rather than actual policy. The Victoria Climbià © Inquiry report established the conflicts of agents working together as they failed to link small factors which would have led to realise she was being abused. It established that there were key opportunities which could have taken place to help intervene to help  Victoria. None of the professionals who had seen Victoria questioned why she had not been attending school or had not been registered with a GP. Victoria was seen by Dr. Schwartz who failed to spot evidence of the 8 year Old’s abuse, asserted her view that due to the due of the essential ‘interpretative nature of inter-professional communication’, Victoria was ignored. Schwartz claimed the injuries were evident as scabies infection, this opinion which previously as scabies infection, this opinion which previously contracted a locum registrar, Dr Ajayi-Obe who had the view that she had been physically abused. But the consultant claimed she did not consider it necessary to take a case history, despite her child protection concerns as she expected social services to investigate the girls circumstances (Batty, 2001). Lord Laming asserts in his evaluation of the professional; practices surrounding Victoria’s case, in order for children to be adequately safeguarded, information within agencies has to be improved. Each agency needs to prioritise passing information to another agency and the recipients should query any points of uncertainty. In the words of the two hospital consultants who had Victoria, â€Å"_I cannot query for the way other people interpreted what I said. It was not the way I would have liked it to have been interpreted_† (Dr Ruby Schwartz) â€Å"_I do not think it was until I have re-read this letter that I appreciated quite the depth of misunderstanding_† (Dr Mary Rossiter). This shows how Victoria was in the middle of miscommunication which was the downfall to her safety (Laming, 2003) While analysing about statements, it is obvious the lack of communication and misunderstanding was apparent, making it obvious to see how Laming came to this view. It is clear that action to safeguard Victoria non-existent; she was caught up in the dysfunctional ‘_gatekeeping’_ practices in Brent Social Services. Actions to safeguard Victoria were hindered due to the undetected and failing practice of the institutions in which she was involved in. Within society, children are seen as needing protecting from economic and social structures. It is seen that social meanings in society differ depending on different risks and needs, this is apparent within the ECM agenda with the policy documents. Negatively views as the child being  Ã¢â‚¬Ëœcitizen-worker-of-the-future’ (Williams, 2004, p.408). It is seen that the child’s view is being ignored, from their views which were expressed in the ECM consultation process- which emphasized on extra-curricular activities and spaces for children (DfES). This is seen as common within policy-making and how children are being constructed within the society we live in. Rather than being seen as children practising to become adults, children are viewed as not be able to know ‘what is rational because they cannot yet see what rational’ (Archard, 1993, p.g6). Therefore children are always seen as being needed to be developed and protected by the capital. Some would say that within different agencies some practitioners within different agencies are not aware with the understanding of how different services defer depending on different level of need. This can be a problem as children and families could be given the wrong type of service. Guidance from ‘Early Intervention Securing Good Outcomes for Children’ (DCSF, 2010) saw early intervention as not relating ‘_exclusively to intervening younger ages’_ but tackling issues ‘as they arise, whatever the age of the child or young age’. Early intervention is used in order to safeguard children is demonstrated by ‘_research studies and cost-benefit analysis’_ (Easton and Gee, 2012) Policies within the government seem to have progressed towards early intervention. Not only due to the safety of children, but was due to economic grounds of children’s failure to secure necessary skills, qualifications and moral ideas for their future. Soon the government decided to show-case their concerns for children having future problems with employability and criminality, therefore introducing the framework for education _Birth to Three Matters_ in 2002 (DfES), to confirm that no child is exempt from developmental prescription. This is relevant to safeguarding children in the sense that with the frameworks, children who are seen to be ‘in conflict’ with the law or seen as threatening and as such forfeit their right to be ‘safe-guarded’ although those are children who may need protection the most. According to ‘Working Together to Safeguard Children’ (2010) a document  released by the government based on a guide for organisations and individuals who need to work together to safeguard children. In regards to thresholds and assessment the document established, the Local Safeguarding Children Boards (LSCB) should take part in local arrangements for taking common assessment and use the Common Assessment Framework (CAF) when appropriate. They came about to ensure practice work in place that aims to target particular groups by ‘developing/evaluating thresholds and procedures for work where children and families where a child has been identified as ‘in need’ under the Children Act 1989†². Also, that ‘local arrangements’ are taken for common assessment while using CAF and be aware when it is possible to refer a possible child in need to children’s social care services, this is enforced by the Children’s Trust board, wor king with the LSCB. The Common Assessment Framework was developed as a standard tool for all professionals working with children and families, used for assessment and referral purposes (Department for Education and Skills [DfES], 2006a, 2006b), all this in the hope of professionals working effectively through communication and shared information. As the government has come up with the aim of bringing child welfare to a common understanding within different agencies and professionals, the introduction of CAF is designed to illuminate this. CAF was designed in order to focus on the needs and strengths rather than ‘concerns’ for children within these services. Professionals have been encouraged to educate strengths, needs action and solutions for children across three domains derived from the Framework for Assessment of Children and Need and their Families (DoH, 2004): ‘_Development of unborn baby, infant or young children’, ‘Parents and carers’_ and ‘F_amily and environmental’._ As the CAF is evidence based, which can make the completed CAF very hard to understand, even for experienced child welfare professionals (White et al., 2008). As the need for Child Care services has increased, in total, between April 2011 and January 2012 Cafcass, received 10,199 new applications – 10.8% higher when compared to the same period last financial year (Rogers and Evans, 2012). This shows that the manner in which the 1989 Children’s Act is being applied effectively within the country; agencies are acting faster and  more effectively in ensuring vulnerable children are being removed from neglect and abusive households, therefore due to a more rapidly and responsive assessment and awareness, professionals of leaving a care are the cause of higher numbers of applications. Children’s Care prioritizes care for those circumstances such were the family or child are in such serious danger. According to North Yorkshire Safeguarding Children Board these are the key responsibilities for Children’s Care (web ref 1): Assess, plan and provide support to children in need, particularly those suffering or likely to suffer significant harm; Make enquiries under Section 47 of the Children Act 1989 wherever there is reason to suspect that a child in its area is at risk of significant harm; Provide a Key Worker for every child subject to a Child Protection Plan; Ensure that the agencies who are party to the protection plan coordinate their activities to protect the child; Convene regular reviews of the progress of any child subject to a Child Protection Plan through both Core Group and Child Protection Conference Review meetings; Instigate legal proceedings where required. In order to provide effective service, professionals must be prepared to seek an understanding from other practitioners, from other organisations in order to form phrases which have little meaning and result in the use of habitualization. (White et al., 2008) In order to assess the participation within parents and child it is important to use CAF to assess the children and to identify needs (Department for Education and Skills, 2005). Parenting is held to be important for the life  chances of all children, although in reality parenting interventions are focused upon the poorest parents (Goldson and Jamieson, 2002). Safeguarding children requires the need to ensure that the child is in best hands in terms of carers for them. Carers who are seen to be of a negative light within society, this weighs heavily on each child, as each child depends on someone to look after them as they are vulnerable. The condition of children who are incapable of acting for their best interests justifies the need of carers; policies are put into place to ensure the rights and power between parents and child. Parents in acting in behalf of their children, but it also constitute such tutelage as a duty (Archard, 1993, p. 7) Due to the Adoption and Children Act 2002, which emphasized how agencies have a duty to assess harm whenever domestic violence was present, the increase of cases referred to Children Protection Registers etc. because of domestic violence was paramount. However it is seen that although there is an increase in cases of domestic violence being assessed properly, evidence of services which protect them have not been increasing resulting in these services having to consider what can be done to improve their response with the current budgets. The importance of working with parents and child in order to achieve the best outcome is vital as it ensures effective help has been used. Working in partnership with parents is needed as working with parents is shown through the Children Act 1989. ‘supporting families, when necessary, to bring up their children and working in partnership with parents whose circumstances may be difficult is at the heart of our Children Act’ (Department of Health 1995a, p.1) Many other acts support working in partnership with parents, such as the green paper Every Child Matters as it encourages the involvement of agencies and support through early intervention not only through child protection work but others also. However, with these multi-agencies working together to helping and empowering parents, some families are seen to be reluctant to receive these services which has some negative effects on safeguarding children. It is seen that some workers draw back from negative threats of violence or intimidation and many plans that were supposed to do undergo have not and therefore left unchallenged. This is evident in the  death of Ainlee Labonte in 2002, through the negative behaviour of her parents who refused to cooperate with the agencies offered to them, workers often ‘froze’ which therefore hindered their ability to follow through with referrals, assessments or plans (Brandon et al, 2008, p.96) Referring to parents power and participation with children and professionals it is also important to establish how the Adoption and Children Act 2002 contributed to a further amendment to the Children Act 1989 in respect of fathers’ parental responsibility. This refers to all professionals working with children should know the parental responsibility; it previously contained information which hindered unmarried fathers access to their children. This act put in place has ensured that the child’s interest were key and not just the interests of the government, with social workers looking at adults in a family who had real relationships with their children. The current situation is that the following have parental responsibility The child’s mother The child’s father if they are married to mother The child’s unmarried father if registered on the child’s birth certificate Someone who adopts child Someone who becomes the child’s guardian on the mother’s death etc. Overall, it is important to establish the importance of safeguarding children with the UK. With cases such as Victoria Climbià ©, which emphasized the lack of good professional practice has led to many different changes. Although some would say these changes are not always implemented everywhere. Practitioners have a key role in ensuring the process of communication between different organisations and professions, which the acts and policies such as the Children Act 2004 and Every Child Matters, the integration of children services can be practised to ensure protection for children and  families. It is seen that in order to improve the outcome of children, services should monitored more closely to ensure the outcomes for children are ones we expect. With the services being more effective and the commitment of inter-agencies working together, the aims can all be achieved. BIBLOGRPAHY Adams, R. C., Dominelli, L. and Payne, M. 2002. _Social Work: themes, issues and critical debates_. Basingstoke: Palgrave. Allen, N. (2005) _Making Sense of the Children Act 1989_. Chichester: Wiley. Archard, D. 1993. _Children: Rights and Childhood_ London: Routledge. Pg 7 Audit Commission (1994) Watching Their Figures. London: HMSO Batty, D. 2001. _Climbià © doctor admits errors put girl at risk_. [Online] Available at: http://www.theguardian.com/society/2001/oct/12/5 [Accessed: 15 Jan 2014]. Batty, D. 2004. _Climbià © social worker admits mistakes_. [Online] Available at: http://www.theguardian.com/society/2004/sep/02/childprotection.socialcare [Accessed: 10 Jan 2014]. 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