Abstract for Cryogenics

Historically, cryogenic rocket engines have not been used for in-space applications due to their additional complexity, the mission need for high reliability, and the challenges of propellant boil-o& While the mission and vehicle architectures are not yet defined for the lunar and Martian robotic and human exploration objectives, cryogenic rocket engines offer the potential for higher performance and greater architecture/mission flexibility.In-situ cryogenic propellant production could enable a more robust exploration program by significantly reducing the propellant mass delivered to low earth orbit, thus warranting the evaluation of cryogenic rocket engines versus the hypergolic bi-propellant engines used in the Apollo program. A multi-use engine. one which can provide the functionality that separate engines provided in the Apollo mission architecture, is desirable for lunar and Mars exploration missions because it increases overall architecture effectiveness through commonality and modularity.The engine requirement derivation process must address each unique mission application and each unique phase within each mission. The resulting requirements, such as thrust level, performance, packaging, bum duration, number of operations; required impulses for each trajectory phase; operation after extended space or surface exposure; availability for inspection and maintenance; throttle range for planetary descent, ascent, acceleration limits and many more must be addressed.Within engine system studies, the system and component technology, capability, and risks must be evaluated and a balance between the appropriate amount of technology-push and technology-pull must be addressed. This paper will summarize many of the key technology challenges associated with using high-performance cryogenic liquid propellant rocket engine systems and components in the exploration program architectures.

Hong Kong Cultural Conversation

Conservation is now recognized worldwide as an important component of sustainable development, particularly in cities undergoing rapid development. In Hong Kong, however, it was not until the recent years that the city's government, citizens and the media have brought more attention to the development of the city's cultural and arts scene and preservation of the former British colony's unique cultural heritage. In response to the social unrest, the government has begun to develop a specific strategy with regard to the arts and culture.One main focus of their strategies lies in the preservation of Hong Kong cultural heritage. However, despite the government’s effort on heritage preservation, what probably is just as frustrating is the Hong Kong government’s awkward attempts at heritage preservation and privatization of public spaces. Is the government making progress to preserve our cultural heritage? Or is it just making progress to transform our heritage into commoditi es and taking further steps to engage in economic exploitation of public space?What elements should be put into consideration when we talk about cultural preservation and urban planning? Where are the missing parts in the design of existing projects to stand a chance of living the metropolitan spaces in accordance with the real needs and hopes of the people who live in the space? Problem that lies behind the positive metropolitan image of Hong Kong Despite the image of Hong Kong as a metropolitan city successful in international finance, commerce and tourism, a deep-rooted problem that lies in Hong Kong people’s heart is a lack of sense of belonging, a lack of Hong Kong identity.During colonial period, Hong Kong has been referred to as a borrowed space and borrowed time. Meanwhile, the differences in culture and civilization between Hong Kong and China created a barrier to Hong Kong people’s identifying themselves as Chinese. â€Å"Hong Kong’s lack of identity is also due to its status as not so much a place as a space of transit, whose residents think of themselves of transients and migrants on their way between China and other cities. Worse still, after the handover in 1977, we have been experiencing limited democracy in our society, as reflected in limited political rights granted to the public and lack of public election mechanism. â€Å"Hong Kong people ruling Hong Kong† therefore remains a political slogan and still a goal. Searching for Hong Kong identity continues, and this psychological barrier partly explains why the Hong Kong brands and products often faced the criticism of lacking a unique identity.Conserving cultural heritage as a way to define self identity The limitations on democracy in post-colonial Hong Kong is causing more public outcry to seek expression or confirmation of their identities through preservation of arts and culture. It has been argued that the role of art and culture in Hong Kong has taken on incr easing significance in the city's search for an identity over the past 13 years since China resumed sovereignty over the territory. More and more people identify themselves as Hongkonger and less as Chinese or British colonist.People are defining themselves as Hongkongers and conserving Hong Kong’s heritage, especially architectures and sites where their collective memories came from is part of that self-defining. Along with these attempts is a change in societal expectations. Hong Kong used to be a developers’ dream as economic prosperity over the past 30 years has been largely due to its immense rate of construction. Now people see the paradox that as they are advancing to become a global city they are also losing parts of their lives, thus there emerged voices on conservation.While the Hong Kong government’s heritage policies—or lack thereof—are threatening to destroy what is left of our past that constitutes our cultural identity in the name of development, people start to speak out on preserving what they grew up with and feel it is important to taking the lead in mentoring the next generation about Hong Kong’s history and cultural heritage. The public space in Hong Kong being a battle field In Hong Kong, every inch of land is labeled with an economic value. The high value of land in Hong Kong heightens the level of control and conflict in land use.In the past few years, we have already seen the tenement houses on Wing Lee Street in Central, the Graham Street Market in Central, Lee Tung Street and Queen’s Pier in Wanchai, all being the landmarks of old Hong Kong, earmarked for destruction. We have also seen the privatization of public space at the expenses of public interests: shopping centers in public housing estates originally managed by the Housing Authority have been privatized by The Link; the development of West Kowloon are tilted towards orporate interests not the livelihood of residents; The harbou r front of Hong Kong Island, cut off from the living space of ordinary people, has turned into the backyard of luxurious private residential complexes or giant shopping mall housing all the big global brands; the Central seafront reclamation area also falls into the same fate -it is designed as an extension of government offices and the huge Mody Mall, instead of being considered for cultural and recreational use as demanded by the Hong Kong public.Urban and social planning on land use and distribution of wealth shows a tendency of being biased towards corporate and capitalists’ interests. Hong Kong people are yet to have a say to the use of their own space and this has given rise to many social problems such as public’s opposition sentiment towards government, self-identity crisis, substitution of local diversity and choices by global demands for homogeneity, widened gap between the rich and the poor, and so on.The turning points that awake the government One of the t urning points in public opinion with respect to heritage preservation was the renewal of Lee Tung Street in Wanchai. This street was well known to all of Hong Kong as â€Å"The Wedding Card Street. † All the little shops provided all the props necessary to have a happy and prosperous Chinese wedding, giving this street an aura of vibrancy and joy. However, the urban renewal authority had targeted the whole street for renewal.Many of the shopkeepers were upset to be pushed out of the area as they felt want to stay here not just for business but also because they had established a community with neighborhoods from a few generations and therefore a strong emotional attachment with the place. There were many protests and banners expressing the dissatisfaction of the shopkeepers. The public outcry did not work to influence the government’s decision and the shops are now all closed awaiting redevelopment.Another turning point is the demolition of the Queen’s Ferry pie r along with its iconic clock tower in Wanchai in December 2006 as part of the traffic development plan for Wanchai. It has led to widely publicized protests and even hunger strikes that the government had not anticipated. Yet the citizens again lost in the battle to fight for public space. The pier was a â€Å"young† 49 years when it was destroyed and was not considered old enough by the authorities and, therefore, it did not have enough heritage value.Yet, to many Hong Kong people, the historic value of the pier is not measured only by its duration or by a number as of years or days, for time is also related to the question of memory, experience, moment. According to Local Action, a local group with hundreds of members that led the protests against the government with the goal of saving Hong Kong’s culture heritage and public space, â€Å"The pier is a symbol of Hong Kong history with strong socio-political significance for many social and political events took plac e at the pier.It had also been used by many royalties and governors as they came to Hong Kong and many demonstrations took place here, signifying its importance as a landmark† People expressed that it is also a place where their memories and experiences came from therefore they have developed a strong attachment to â€Å"their place†. This public reaction echoes John Urry in â€Å"Reinterpreting Local Culture from Consuming Placesâ€Å", in which John remarked that â€Å"the object signifies the place and that if the object were to be demolished or substantially changed then that would signify a threat to the place itself. †

Animal Abuse essays

Animal Abuse essays You turn on your TV just o hear about another unnecessary tragic death. I am not speaking of car accidents or Aids, but referring to the deaths from the unending, continuous rash of the deaths cause by adults and very often children killing with a gun. IN order for this unnecessary killing to cease, gun control laws need to be strengthened. It is the moral obligation of the American citizen to realize that gun control is not only an intelligent option, but also one that is a matter of life or death for many people in todays society. The recent hooting at high schools is further evidence that the availability of guns is widespread. Without strict gun enforcement laws, guns will continue to be the weapon of violence. Gun control hobbyists believe the tightening of gun laws will do nothing to cure the problem of a violent society. While this is true, laws that enforce stricter gun control of a object that has the ability to do immense harm, seems like a logical answer, and a good first step. ...

Dangerous Liaisons essays

Dangerous Liaisons essays Les Liaisons Dangereuses is a complex and disturbing portrayal of the noble class in France. Set in the late eighteenth century just before the revolution, Les Liaisons Dangereuses weaves a web of cold, calculated betrayal of the most immoral kind. It is a mannered, elegant tale in which the languorous intrigues of the opening scenes set up the violent passions of the later ones. It is a story in which the surfaces are usually calm and only the flash of an eye or a slightly raised voice betrays the most terrible struggles going on beneath. This is a scandalous drama about the sexual machinations of two jaded French aristocrats who use sex and desire as weapons of destruction and as means to hunt for revenge and acquire power. As they climb the social ladder they ruin the lives of the innocent people who surround them. The Marquise de Merteuil lives in a world of drawing rooms and boudoirs, where she preys upon the innocent and naive, shattering their idealism with a triumphant laugh. Her partner and confidant is the Vicomte de Valmont, who was once her lover and is now her weapon against young women presumptuous enough to love. Seduction is nothing more than a game to them and in their private score keeping, nothing counts more than a heart destroyed and hopes laid to waste. The cold-blooded twosome proceeds gleefully with their heartless scheme until true love unexpectedly alters the course of events. Merteuil and Valmont's greatest pleasure is causing the loss of virtue and shattering hearts. They disguise their depraved indifference as principles to live by and scorn those who experience true emotions. They are so hardened to the ordinary feelings of life that only one emotion can destroy them: love. The story unfolds in the form of letters written between the principal characters, giving it a unique literary texture. By using this style, Laclos is able to give the reader a shockingly intimate look at these peop...

Talking about Age in the Media

Talking about Age in the Media Talking about Age in the Media Talking about Age in the Media By Maeve Maddox Everyone wants to live longer, but no one wants to be old. –Harry Moody, director of academic affairs for AARP (2012). To me old age is always ten years older than I am. –Bernard Baruch, American financier (1870-1965). About forty-two million Americans are 65 years or older. Advertisers, politicians, and researchers often need to refer to this group, but finding a term that will not insult its members is not easy. Various terms have been suggested with varying degrees of success. Elder, elderly, senior, and retiree are the most common. In Canada, according to what I’ve read in forums, the term elder has connotations of venerable age and wisdom; in the United States, however, people tend to associate elder with disapproving church elders or the word elderly. The decline of the acceptability of the word elder is illustrated by the name change of a travel organization established in 1975 for active Americans 60 and older. The parent organization is still called Elderhostel, but in advertising, the program is now known agelessly as â€Å"Road Scholar.† Even the word retiree is heavy with the connotations of age. These days, the American Association of Retired People (founded 1958) goes by its initials only: AARP. When politicians talk about â€Å"our seniors† in the same breath as â€Å"our children,† mature adults understandably bristle. An article in The Senior Times says that the term â€Å"senior citizen† was coined in 1938 during a political campaign. Its use soars on the Ngram Viewer beginning in the 1940s. According to National Public Radio reporter Ina Jaffe, â€Å"senior citizen† is a term that â€Å"seems to annoy just about everyone.† Recognizing the minefield of age and terms relating to it, The AP Stylebook has this entry for the word elderly: Use this word carefully and sparingly. Do not refer to a person as elderly unless it is clearly relevant to the story. It is appropriate in generic phrases that do not refer to specific individuals: concern for the elderly, a home for the elderly, etc. If the intent is to show that an individual’s faculties have deteriorated, cite a graphic example and give attribution for it. Use age when available and appropriate. Apply the same principle to terms such as senior citizen. Age is one of the realities of life that our culture prefers to deny. It’s unlikely that any term can be found to refer to old people that would not be offensive to someone because in our culture, old age itself is seen as offensive. Perhaps the safest course is to refer to the intended age group in numeric terms: between the ages of 65 and 75 above the age of 65 septuagenarian octogenarian nonagenarian centenarian Colloquial synonyms for â€Å"old person† range from friendly to deliberately hurtful, for example: old-timer oldster codger dotard crone coot Although the word codger (like coot) usually has a negative connotation, this review about Dick Van Dyke in the Chicago Tribune (1992) makes a kind of compliment of it: The wonderfully funny Dick Van Dyke, insufficiently honored in his prime, has now passed into the lovable-old-codger stage. His comic gifts are sharper than ever, and he still dances with grace, style and a naughty insouciance. He is much too good for the quirky-old-coot roles that are his lot nowadays. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:70 Idioms with Heart50 Idioms About Arms, Hands, and FingersComma Before Too?

MARKETING MANAGEMENT Research Paper Example | Topics and Well Written Essays - 3000 words

MARKETING MANAGEMENT - Research Paper Example 88; Valentin, 2001). This explains why most of the colleges and universities are very focused on equipting all future managers with regards to the use of this particular analytical tool in business (Aghdaie and Zardeini, 2012; Chan, 2011). As defined by Lamb, Hair and McDaniel (2012, p. 40), competitive advantage is â€Å"a set of features of a company and its products that are perceived by the target market as signficant and superior to the competition†. Considering the tight market competition that is currently going on in both domestic and international market, the ability of the managers to develop and create a competitive advantage on behalf of the company becomes very important. With the purpose of gaining more insight on how to critically examine both internal and external factors that can significantly affect the success or failure of a business organization, this study will focus more on critically evaluating the main role of the SWOT analysis framework particularly w hen it comes to establishing strategic priorities that will improve the company’s ability to compete within the local and international market. ... 88) defined SWOT analysis as a â€Å"technique for focusing an individual’s or group’s attention on strengths, weaknesses, opportunities, or threats†. Using a 2 x 2 matrix, the main purpose behind the use of the SWOT analysis framework is to help executive managers make important decisions that can affect the company’s short-term and long-term overall business performance (Aghdaie and Zardeini, 2012; Oetomo and Ardini, 2012). According to Ommani (2011), it is possible to conduct a SWOT analysis to help the business people and executive managers gain a better understanding and full insight with regards to the company’s past business experiences. By going through the previous experinces of the managers, Ommani (2011) explained that the company’s top executives can think better in terms of developing effective solutions to the problems. For example, through the use of this particular analytical framework, executive managers will be able to ident ify the company’s current position in the market and all signs of potential future risks. Specifically the identified strenghs and weaknesses are internal factors whereas opportunities and threats are external factors that can significantly affect the business (Aghdaie and Zardeini, 2012). Using the SWOT analysis framework, executive managers will also be able to compare and constrast the company’s internal strengths and weaknesses with that of its close competitors (Aghdaie and Zardeini, 2012; Murray-Webster, 2010, p. 88). According to Ferrell and Hartline (2011, p. 120), the SWOT analysis framework is the simpliest and most effective strategic planning tool which can be used in the study and analysis of all marketing facts and figures. It means that through the use of

Clinical Depression Essay Example | Topics and Well Written Essays - 750 words

Clinical Depression - Essay Example In men the symptoms are found to be depressed mood, loss of interest in activities that give enjoyment, changing appetite, feelings of guilt, helplessness, suicidal intention, loss of interest in career, changing jobs, etc In women the symptoms are found to be sudden loss and gain of weight, physical pains and aches, emotional behavior, crying etc. However the loss of appetite and feeing of sadness and suicidal ideation are found to be seen as common for both men and women. The website called Healthyplace.com [2006] has found that â€Å"While women may cry, become withdrawn and gain or lose weight, men may abuse alcohol or drugs, work or eat exclusively and or become violent to themselves or others, among other things† This clinical depression is otherwise called as the major depression. People get a feeling of sadness continuously. It seems to attack people of the age group 25-50. But recent studies over the topic says that it might people at any age. Clinical depression exists in an individual for about six to nine months. But if not treated it might take a long journey and leave such prolonged stay might attribute to the abnormalities in the body condition. The causes are found to be ambiguous, but scientists have analyzed that genetics, biological and psychological reasons could be added to the cause for depression. Stress is discovered to be the major cause for this disease. This stress might arise form an individuals’ social and occupational and other areas of functioning. The chance of psychological effect over the development of this disease seem to be less as there are other causes that might contribute to the disease. The biological reason is that of the dysfunction of the neurotransmitters. These neurotransmitters transmit signals between the cells in the brains. The chemical imbalance that occurs in the neurotransmitters leads to the depression. The level of the neurotransmitters affects the mood of