The Main Provisions Of The 1944 Education Act And 1988...

The 20th century saw more changes to education than the thousand years preceding it. This was largely in response to a recently industrialised country; with newly acquired voting rights, it became apparent that education should not be only for elites. Education is a crucial element of social mobility and it is important we fully understand both the positive and negative aspects of previous legislation to help us plan for the future. The were two major 20th century pieces of legislation: 1944 Education Act and 1988 Education Reform Act. Both brought with them changes that are still being felt today. This essay will cover those Acts in detail, along with other sizable changes such as comprehensivisation, marketization and how other external†¦show more content†¦The ramifications of Butler’s failure to separate church and schooling and further pandering by all subsequent ministers can still be witnessed today. The church s influence on teaching on subjects evolution has forced the requirement of a law to ban creationism being taught (BHA, 2014). It has also come to light that many faith schools teach a very narrow worldview pertaining of just their own beliefs (NSS, 2015). Furthermore the school age was raised to 15 in 1947, with secondary education beginning at 11. Though the lack of funding and teaching costs meant this took a long time to fully implement as the act stated it should be raised to 16 as soon as feasibly possible but this did not happen until 1972. Other changes included free milk and meals, clothing grants as well as transport to and from schools. As families would normally expect children to be working by the age of 13-14 these measures ensured there was not too high a financial burden on parents. Giddard (2011) argues that although there were many problems with the 1944 Act its redeeming features were forward looking and progressive. Few debates in education have been given more time than grammar schools. Though not a part of the 1944 Act the tripartite system was based on a report by the Norward committee (1943); which made recommendations based on the pseudoscience notion of there being three types of mind:

Essay about Post War Impact of Vietnam - 1717 Words

Post War Impact of Vietnam Tim O’Brien’s The Things They Carried is an excellent piece of metafiction. While highlighting the revulsions of the war, O’Brien often times narrates his personal experiences in Vietnam. Line between fiction and actual account of the war is typically blurred. Book is not only quite descriptive but it also perfectly conveys the horrors and realities of combat. For this research paper I will analyze Tim O’Brien’s ‘The Things They Carried’ and examine the transformations faced by young men, lack of support for returning Vietnam veterans and the bias portrayed in the media. Vietnam war has been one of the most deadliest and expensive wars to date. Not only it resulted in massive casualties and financial losses,†¦show more content†¦Jimmy Cross is also in love with this girl named Martha. He constantly dreams about her during the day just to escape the reality of war. Martha often sends him letters and photographs of herself. â€Å"They were often signed Love, Martha, but Lieutenant Cross understood that Love was only a way of sighing and did not mean what he sometimes pretended it meant.†(O’Brien 2). This shows us another facet of people back home, who somehow felt obligated to communicate with the soldiers. Many soldiers upon return discovered that women that they were in love with had left them for someone else. As the story progresses we read that Jimmy Cross is so occupied with thoughts about Martha that it results in death of one of his men, Ted Lavender. He is riddled with guilt, which later on he confesses to O’Brien back in the US. Its not entirely clear if Ted died due to Cross’s negligence, yet like many veterans he constantly blames himself. Although Jimmy is smart, he is not a great leader and oftentimes questions his own decisions. He like most of other young men follows commands from HQ even if he doesn’t necessarily agree with them. â€Å"The filth seemed to erase identities, transforming the men into identical copies of a single soldier, which was exactly how Jimmy Cross had been trained to treat them, as interchangeable unit of command.†(Obrien 156) In this paragraph we get a glimpse inside the military officerShow MoreRelatedHistory Course Outline787 Words   |  4 PagesAustralia in the Vietnam War Era * Changing Rights and Freedoms * People Power and Politics in the Post-war Period * Australia’s Social and Cultural History in the Post-War Period Australia in the Vietnam War Inquiry questions †¢ How did the Australian government respond to the threat of communism after WWII? †¢ Why did Australia become involved in the Vietnam War? †¢ How did various groups respond to AustraliaÂ’s involvement in the Vietnam War? †¢ What was the impact of the war on AustraliaRead MoreZiek Sanchez. Massie And Perry . Pd. 3. April 12, 2017.1113 Words   |  5 PagesZiek Sanchez Massie and Perry Pd. 3 April 12, 2017 Post Traumatic Stress Disorder From The Vietnam War The Vietnam war was one of the most alarming and dangerous wars to fight. Every step in the Vietnam jungle was taken cautiously. The guerrilla warfare used by the Vietcong was frightening to anticipate. The majority of the United States army was only that of young men who had been chosen through the draft. Young men going to school and living a life at home in safety all the sudden having to makeRead MoreAmerica ´s Hostile Response to the Vietnam War and Post-Traumatic Stress Disorder 1630 Words   |  7 Pagesthe Vietnam War contribute to the high number of Post-Traumatic Stress Disorder victims? 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AndRead MoreThe Vietnam War Was A Long And Bloody1502 Words   |  7 Pages The Vietnam War was a long and bloody one. The war began on November 1, 1955 and ended on April 30, 1975. The war lasted nearly 20 years. Over this period, 9,087,000 men from United States were deployed, 58,220 were killed and more than 300,000 were wounded. The war also killed an estimated 2 million Vietnamese civilians, 1.1 million North Vietnamese troops, and 200,000 South Vietnamese troops. The Vietnam War was the first war America ever lost and this lost would lead to a heavy impact on theRead MoreThe Vietnam War: The Mental, Social, and Physical Effects on the Soldiers1402 Words   |  4 PagesIn 1961 the worst war ever fought by America had just started. The Vietnamese of the north also known as the Viet Cong had invaded the south to take control of the entire country. America and other democratic countries felt the spread of communism to this country would be a stepping-stone for other communistic countries around the world, also known as the Domino Effect. America, as cocky as they were, invaded Vietnam to help the southern Vietnamese. Although America is one of the most powerful countriesRead MorePost Traumatic Stress Disorder1149 Words   |  5 Pagesfirst taken seriously when the Vietnam veterans returned from the war. Combat experience is the most commonly linked to this disorder. However, studies have shown that there are many different causes. These studies were applied to a wide variety of traumas that people have experienced in various horrific events. According to The National Institute of Mental Health, â€Å"about 4% of American adults ages 18-54 suffers from PTSD in a given year. These people have served in wars, have been raped or mugged,Read MorePsychological And Emotional Effects Of War On Soldiers1500 Words   |  6 PagesEffects of War on Soldiers We have all seen or read about the political and social upheavals caused by war. Some may have even experienced it first-hand. Throughout history war has had negative psychological implications on those effected. However, there is no greater negative impact of war than the psychological and emotional turmoil that it causes individual soldiers. To narrow down the scope of these psychological effects, I have chosen to focus on the Vietnam War. The Vietnam War was, in myRead MorePolitical And Social Upheavals Caused By War1533 Words   |  7 Pagescaused by war. Some may have even experienced it first-hand. Throughout history war has had negative psychological implications on those effected. However, there is no greater negative impact of war than the psychological and emotional turmoil that it causes individual soldiers. To narrow down the scope of these psychological effects, I have chosen to focus on the U.S. military involvement in the Vietnam War during the period 1962 to 1973. The Vietnam War was, in my opinion, the first war that reallyRead MoreThe Vietnam War And The Cold War1494 Words   |  6 Pages When examining the Vietnam War you must first understand the involvement of the events surrounding the Cold War. The ‘Vietnam War’ as it is known is a product of the cold war era, by this I mean that events in the Cold War led to the US’s involvement and creation of issues causing the conflict. â€Å"The Vietnam War was a long, costly armed conflict that pitted the communist regime of North Vietnam and its southern allies, known as the Viet Cong, against South Vietnam and its principal ally, the United

Get A Grip Tour free essay sample

Aerosmith: Get a Grip Tour I recently had the pleasure of seeing this band play at New York Citys Madison Square Garden. These 40+ rockers have been banging out hits since the 70s. Age hasnt slowed these guys down at all. Aerosmith opened with one of their more recent songs, Eat the Rich, which got the crowd singing (or should I say shouting) in perfect unison. This was followed by one of their numerous classics, Toys in the Attic. Other songs that made the concert memorable were Draw the Line, Sweet Emotion, The Other Side, Love in an Elevator, Cryin,' and Janies Got a Gun. Although the majority of the aforementioned songs are off their last two albums, Aerosmith provides a good enough mix for both old and new fans. The only prop Aerosmith used was a white curtain wrapped around them for the opening. The lights did the rest during the show. We will write a custom essay sample on Get A Grip Tour or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The band definitely doesnt need any help at this stage in their career. Lead singer Steven Tylers on-stage antics during and in-between songs gave off so much energy that one could easily mistake him for a 20-year-old. The guitar chemistry between Joe Perry and Brad Witford was amazing in itself on tape, but the fact that it was phenomenal live, too was rare and unique. Both have progressed so much since the very first album, Perry with his inventive, emotional guitar solos and Witford with his strong, articulate rhythms. The balance between Joey Kramer (drums) and Tom Hamilton (bass) provided an outstanding basis for the rest of the band, but this was done in such a way that they stood out just as much as everyone else. This experienced rhythm section knew when to lay back and when to come right up to the forefront with everyone else. The end seemed to come too soon even though Aerosmith played for two hours straight. The encore opened and ended with classics. Dream On was the opener and Walk This Way finished the set off. Aerosmith was definitely one of the best concerts that I have ever seen, if not the best. . Review by N. P., New City, NY

Intellectual Development Ofyoung Children Essays - Child Development

Intellectual Development Ofyoung Children In two separate issues of Time magazine, the intellectual development of infants and preschoolers was analyzed with contrasting viewpoints regarding the development of their brains and the views regarding how best to encourage the cognitive abilities of these young children. In the earlier issue, dated February 3, 1997, the special report consisting of two articles titled Fertile Minds and The Day-Care Dilemma the theories of Jean Piagets cognitive-development are supported. In the latter issue, dated October 19, 1998, the special report titled How to Make a Better Student focused on refuting the theories supported in the earlier issue of this magazine. Understanding the influence of Piagets and others views on intellectual development of young children on the contrasting views of this topic and how it reflects contemporary opinions on how young children should be raised is the focus of this paper. Hopefully, these contrasting articles will provide a more holistic understanding of Pi agetian theory and its application to real-life situations. I. Children's Intellectual Development: Preoperations By the age of 3 and 4 years old, children have attained what Piaget called functions or preoperations that enable young children to perform a number of feats far beyond the capabilities of infants (Piaget, 1950). Infants concentrate on constructing a world of permanent objects. Once constructed, these objects will be known to exist even when they are no longer present to the infant's senses. Preschool children, in contrast, are constructing a world of qualities and properties that different objects share in common. They are beginning to identify and name colors, shapes, textures, density, and so on. At this stage, children are beginning to understand same and different as these terms refer to properties. At the same time, it is necessary to recognize that these classes are formed only on the basis of perceptual attributes such as color and form and not on the basis of any quantitative characteristics. Moreover, although children can name and identify members of different classes cow, dog, or car, they cannot as yet operate on these categories in a systematic way. That is to say they cannot logically add categories and recognize that cats, dogs, and cows are all animals. Nor can they logically multiply classes and appreciate that a cat is both a cat and an animal at the same time. In short, the one-many or quantitative dimension of classes escapes young children. Only when they have attained the concrete operations of childhood (age 6 to 7 years) will they begin to be able to coordinate sameness and difference and arrive at the notion of a unit that is basic to all quantitative thinking. A unit, for example the number 3, is at once like every other number in that it is a number but also different in that it is the only number that comes after 2 and before 4. Once children have a notion of a unit, they can engage in numerical as well as logical addition and multiplication (Gesell, 1949). The young child's limitation with respect to operating on classes is most evident when we ask them to define a word. Young children routinely define words by describing their functions; an apple is to eat; a bike is to ride. Only when they attain concrete operations at about the age of 6 or 7 years will they begin to define terms by nesting them in higher order classes, where an apple is a fruit, and a bike has wheels--you go places with it. Occasionally young children may define a word by placing it within a broader context, but this is often an anticipation of later intellectual achievement, not a true reflection of the young child's competence (Carey, 1989). In the Fertile Minds and The Day-Care Dilemma articles, neuroscientific evidence is used to comply with Piagetian theory of preoperational stages of development. The article describes in depth how the rapidly proliferating brain cells at birth make connections that shape a lifetime of experience. Thus, the author of this article points at that the first three to four years of development are critical and that there is an urgent need . . . for preschool programs designed to boost the brain power of youngsters (Nash, 1997, p.51) This

Akensides Justification for Imagination

Akensides Justification for Imagination Free Online Research Papers Mark Akenside begins his Pleasures of the Imagination (1744) with the remark: Oft have the laws of each poetic strain The critic-verse imploy’d; yet still unsung Lay this prime subject, though importing most A poet’s name. Addison before him may have addressed the imagination in his work of the same name, yet the above comment reveals that there was something left ‘still unsung’ within this ‘prime subject’ for Akenside, a ‘poet’ himself. I believe that what Akenside believed still ‘unsung’ was the idea that imagination is used every day by men in all value judgements. Akenside strove to justify his emphasis on the importance of the imagination and all its faculties. How Akenside achieves this is through a step by step argument culminating in implicating a larger role for imagination within any conception of aesthetics or philosophy; although the term ‘aesthetics’ is strictly anachronistic and was not in use in Akenside’s time, it seems to be the focus of much of Akenside’s poetry. As Robin Dix states in the introduction to his edition of Akenside’s poetical works, ‘The key to appreciating its artistic and intellectual unity lies in the recognition that it is primarily concerned with what would now be called aesthetics’ (19). Initially, Akenside begins his argument by outlining the way imagination reacts to physical stimuli. In Book I 109-138 Akenside describes in eloquent terms how our response to nature attunes ‘the finer organs of the mind’ (15, Reader) and stimulates our imaginations, causing us to smile and ‘sink to divine repose’. The perception of the beauty of nature, for Akenside describes nature’s beauty through extremely visual language, is the incentive for the imagination to work in us. This visual language is exemplified in Book I: But not alike to every mortal eye Is this great scene unveil’d. For since the claims Of social life, to different labours urge The active powers of man; with wise intent The hand of nature on peculiar minds Imprints a different byass, and to each Decrees its province in the common toil (14, Reader). This discusses the concept that not all men’s imaginations are equal in their associative powers; the exercise of each man’s mind is different according to the divided attentions each man’s ‘social life’ requires. The line ‘Whoe’er thou art, whom these delights can touch’ (16, Reader) indicates the universality of the use of the imagination; should Akenside justify that imagination is duly important to daily life it will have implications for all men. This in itself is a justification for the use of imagination; it is a tool of liberation, proving that all men are equal in their capacity to enjoy nature’s bounties as described in lines 109-138 (15-16, Reader). The ordaining of the eye for perceiving the beauty of God’s work is further considered here in the text: Nor ever yet The melting rainbow’s vernal-tinctur’d hues To me have shone so pleasing, as when first The hand of science pointed out the path In which the sun-beams gleaming from the west Fall on the watry cloud (41, Reader). This introduces two concepts important for Akenside’s argument. The first of these two ideas is that the perception of nature creates a sense of pleasure in us. The very fact that looking at a rainbow may cause us to praise the God that made it, and to rejoice that we are alive, is essential in later argument by Akenside to argue that all men must disseminate this pleasure throughout the world to come closer to that which is divine. This emulates the actions of God, as he ‘spread around him that primaeval joy/ Which filled himself’ (49, Reader). This pleasure is part of our ‘passions’ in the poem; the ‘passions’ encompass both feelings of pleasure and pain. From lines 157 onwards in Book II Akenside seeks to justify the consequence of the passions on our capacity to realize the aesthetic. Akenside remarks, ‘From passion’s power alone our nature holds/ Essential pleasure’ (43, Reader) and explains that passion is the oil that keeps the ‘fine machine’ of our bodies ‘polished’. This justifies why passion is important to us, and if it attunes our body, and keeps our bodies ‘polished’, then a pursuit of that which causes passion is also justified, as Steve Clark remarks, there is a ‘synthesis between the two preceding faculties [pleasure and passion]’ (135). However, Akenside asserts the idea that ‘passion’ includes negative feelings too, such as ‘softening sorrow’ (47, Reader), yet we are admonished for focussing on the negative side of the passions, as this is counter-productive for Akenside. God reproves Harmodius for concentrating upon his sorrow, a negative passion; instead he wishes mankind to focus upon using the negative passions to compel a crusade for the dissemination of the positive passions, pleasure. This will allow one to ‘climb the ascent of being, and approach/For ever nearer to the life divine’ (51, Reader). Akenside has justified our pursuit of pleasure in this way; it becomes a way for us to reach the divine: ‘to exalt/ His generous aim to all diviner deeds’ (17, Reader). However, now I discuss the second concept linked to the rainbow passage: that the pleasure created in us when we look at the rainbow is the result of a combination of ‘Three sister-graces†¦the sublime, the wonderful, the fair’ (17, Reader). These categories, while widely recognised as taken from Addison’s work and re-titled, are deployed differently by Akenside than by Addison due to Akenside’s heightened view of the imagination. All of these three concepts are taken from the perception of nature, and they are a source of passion, as described in this passage: What, when to raise the meditated scene, The flame of passion, through the struggling soul Deep-kindled, shows across that sudden blaze The object of its rapture, vast of size, With fiercer colours and a night of shade? (42, Reader). This object of rapture, ‘vast of size’, is a definition of what the sublime is for Akenside. The sublime is thought of as something that cannot be possessed by the mind, because it is too vast; rather it is something that compels us ‘to exalt/His generous aim to all diviner deeds’ (17, Reader), which is again tied in to how Akenside thinks of pleasure as a way to reach the divine. These three types of beauty are also themselves innately divine, as Akenside proceeds to discuss. He links beauty with truth and good concretely in the passage I.372-76, indicating a kind of mutual relationship between the three: Thus was beauty sent from heaven, The lovely ministress of truth and good In this dark world: for truth and good are one, And beauty lives within them, and they in her, With like participation (26, Reader). The passage employs the imagery of the divine, and one is drawn to think of the Virgin Mary with mention of ‘the lovely ministress of truth and good’, and perhaps when regarding the relationship between truth, good and beauty an allusion to the Holy Trinity is meant, as Dix comments (21). This is one of the main justifications for Akenside’s view of beauty: because beauty is present in nature, and nature is the truth, it is also divine (good). In Book II lines 97-108 this argument also appears where beauty, truth and good are again bonded: the concept that ‘the beams of truth/More welcome touch his [man’s] understanding’s eye’ (II. 100-101), or the idea that truth is beauty is emphasised. Furthermore, this is also reiterated by the way the whole poem itself is constructed: the poetry is imaginative and full of expression (beauty), yet uses reason (truth) therefore indicating the ‘good’. Steve Clark comments that in Samuel Johnson’s review of Akenside, he notes The Pleasures of the Imagination ‘prompts not sensual indolence but mental exertion’ (132). This shows that Akenside seeks to make us think philosophically about imagination’s place in our lives, forcing us to recognise how imagination can be linked with the already exalted reason of John Locke before him. Moreover, the idea that these three ideas of truth, beauty and good are bonded together is precipitated in a passage that then seeks to justify the importance of the imagination to this trinity: But beyond This energy of truth, whose dictates bind Assenting reason, the benignant sire, To deck the honour’d paths of just and good, Has added bright imagination’s rays (32, Reader). Akenside introduces the idea that imagination is an aid to the ‘just and good’, put in place by the ‘benignant sire’, which we take to be a divine figure, divinely ordaining imagination. What is also important to note is the elevation of imagination through the description of it as a beam of light, a device with which, until Akenside’s point in time, reason has more often been associated. It seems here that Akenside seeks to justify imagination as a tool to some extent by placing it next to reason. Furthermore, imagination is a tool for furthering the usefulness of the three great concepts, ‘the sublime, the wonderful, the fair’. As Akenside outlines in Book III, the aesthetic responses we have to the world all involve the use of the imagination which essentially lead us to strive toward a more divine existence. This is achieved through the idea that imagination has the power to recall images and stir our emotions again as they did when we perceived them. This is illustrated through this passage: Such is the secret union, when we feel A song, a flower, a name, at once restore Those long connected scenes where first they mov’d The attention (84-85 Reader). Affirming the idea that such images ‘a song, a flower, a name’, when recalled, can enable us to compare those perceptions which brought us pain or pleasure, this comparison can then allow us to strive toward what will being us pleasure. This pleasure has previously been discussed as the result of beauty, truth, and good. The conception, or image of beauty which moves our passions to appreciate God and to compel us toward the divine and the dissemination of pleasure to others, is recalled here in this passage: That not in humble nor in brief delight, Not in the fading echoes of renown, Power’s purple robes, nor pleasure’s flowery lap, The soul should find enjoyment: but from these Turning disdainful to an equal good, Through all the ascent of things inlarge her view, Till every bound at length should disappear, And infinite perfection close the scene (19-20, Reader). What is notable, is the fact that pleasure is not a reward unto itself; it is in fact the endeavour to turn the ‘disdainful to an equal good’ which is the main point of Akenside’s argument for the pleasures of the imagination’s importance. It is the ‘ascent’ that the soul shall strive towards, and in return it will be blessed by God, which is where ‘the soul should find enjoyment’. What is interesting about this concept is that George Reuben Potter has written an article called ‘Mark Akenside, Prophet of Evolution’ stating that Akenside predicted the Darwinian theory of evolution because of this idea of ‘ascension’ and perfecting oneself. He states that Akenside ‘should have his small niche at the hall of fame in whose center [sic] is the figure of Charles Darwin’ (64). This recognition of Akenside’s forward thinking is useful because it confirms my argument that Akenside was innovative in justifying the idea that imagination is used every day in value judgements, in this case to pursue an ‘infinite perfection’ of mankind. In addition, Steve Clark agrees too that Akenside argues that ‘man has been â€Å"ordain’d† not to acquiesce in but to go beyond â€Å"the limits of his frame†Ã¢â‚¬â„¢ (151). This idea, that we are more than the sum of our parts, that we are almost able to transcend our humble attachment to the world of experience through transforming what we experience, is incredibly positive; and given the huge revolution in thought that was the Enlightenment, this was only the beginning. In addition, I believe that not only does Akenside succeed in justifying that imagination has an important part to play in our everyday aesthetic judgements, but he also succeeds in convincing us that mankind has an optimistic part to play in the aesthetic role of our world. The idea that we can evolve towards a higher plain of existence is comforting, but the idea that we can all reach this by improving ourselves through utilising the pleasures of the imagination that we all possess is liberating. In all, Akenside opens the door wider than ever before for discussion on the mind and aesthetics, eventually leading to what would be called Romantic thought. However, Akenside’s huge emphasis upon pursuing the divine may become problematic later in the Enlightenment era when doubt is cast upon justifying God’s existence through the argument of intelligent design, as exemplified by David Hume’s work An Enquiry Concerning Human Understanding (1748), since all of the justification for striving toward a better self in Akenside’s poetry includes some sort of ‘divine’ reward. Yet as a work, Akenside’s Pleasures of the Imagination is entirely cohesive argument for 1744, and any reader today, even if we were to doubt his final justification of divine ordainment, would take pleasure from imagining the allegorical devices Akenside evokes. Bibliography Akenside, Mark. The Pleasures of the Imagination (1744). Course Reader. University of Edinburgh, 2006. Clark, Steve. ‘†To Bless the Lab’ring Mind†: Akenside’s The Pleasures of the Imagination.’ Mark Akenside, A Reassessment. Ed. Robin Dix. London: Associated University Presses, 2000. Dix, Robin, ed. The Poetical Works of Mark Akenside. London: Associated University Presses, 1996. Kallich, Martin. ‘The Association of Ideas and Akenside’s Pleasures of the Imagination’. Modern Language Notes. 62.3 (1947): 166-173. Potter, George Reuben. ‘Mark Akenside, Prophet of Evolution.’ Modern Philology. 24.1 (1926): 55-64. Research Papers on Akenside's Justification for ImaginationMind TravelComparison: Letter from Birmingham and CritoQuebec and CanadaAnalysis Of A Cosmetics AdvertisementAssess the importance of Nationalism 1815-1850 EuropePETSTEL analysis of IndiaMarketing of Lifeboy Soap A Unilever ProductRelationship between Media Coverage and Social andHonest Iagos Truth through DeceptionAppeasement Policy Towards the Outbreak of World War 2

Jussive (Clauses) Definition and Examples

Jussive (Clauses) Definition and Examples A jussive is a type of clause (or a form of a verb) that expresses an order or command. In Semantics (1977), John Lyons notes that the term imperative sentence is often employed by other writers in the broader sense that we have given here to jussive sentence; and this can lead to confusion. Etymology: from the Latin, command Example Jussives include not only imperatives, as narrowly defined, but also related non-imperative clauses, including some in subjunctive mood: Be sensible.You be quiet.Everybody listen.Lets forget it.Heaven help us.It is important that he keep this a secret. The term jussive is, however, used to some extent as a syntactic label, and in this use would not include commands expressed as straight declaratives, e.g. You will do what I say. In popular grammars, where the term is not used, such structures would be dealt with under an expanded imperative label and under subjunctives. (Sylvia Chalker and Edmund Weiner, Oxford Dictionary of English Grammar. Oxford University Press, 1994) Commentary Jussive: A term sometimes used in the grammatical analysis of verbs, to refer to a type of mood often equated with an imperative (leave!), but in some languages needing to be distinguished from it. For example, in Amharic, a jussive paradigm is used for wishes (May God give you strength), greetings, and certain other contexts, and this is formally distinct from the imperative. (David Crystal, A Dictionary of Linguistics and Phonetics, 4th ed. Blackwell, 1997)Imperatives constitute a subclass of a somewhat larger class of jussive clauses. . . . Non-imperative jussives include main clauses like The devil take the hindmost, God save the queen, So be it, and subordinate clauses like [It is essential] that he accompany her, [I insist] that they not be told. The construction exemplified here is productive only in subordinate clauses: the main clauses are virtually restricted to fixed expressions or formulae. Like imperatives they have a base form as first verb... A number of other relative ly minor main clause constructions might be included in the jussive category: May you be forgiven!, If that is what the premier intends, let him say so, and so on. (Rodney Huddleston, English Grammar: An Outline. Cambridge University Press, 1988) [John] Lyons [Semantics, 1977: 747] argues that the imperative can only be, strictly, second person, and never third person (or first person). This may, however, be no more than a terminological issue, since first and third person imperatives are often simply called jussives. Bybee (1985: 171) suggests that where there is a full set of person-number forms the term optative is used, but this is not entirely suitable in view of the fact that the term is used traditionally for the optative mood in Classical Greek (8.2.2)...  The term Jussive (plus Imperative) is preferred here. (F. R. Palmer, Mood and Modality, 2nd ed. Cambridge University Press, 2001)

Soot Essay Example | Topics and Well Written Essays - 750 words

Soot - Essay Example The hydrocarbon fuel molecular constitution is associated with a six carbon atom types which might be obtained, for complex hydrocarbon mixtures, such as, transportation fuels, from the proton nuclear magnetic resonance (HNMR) measurements. Soot derived from ethanol, benzene, and acetylene have dissimilar reactivity and structural order. Soot is usually produced by combusting engines, flickering candle lights, and campfires. The process of soot formation is actually very challenging to comprehend and describe. However, with regard to the demand of for much lower particulate emissions an in depth understanding is absolutely necessary. Most types of combustion systems emit particles into the atmosphere that are a major hazard because of their toxicity to the human health, especially the cardiovascular and respiratory systems. The smaller particles less 100nm in size are regarded as the most hazardous. This is because they can penetrate deep into the lungs. The proposed project aims to determine the theory of formation, structure of (via image analysis) and impact of soot, as well as assess the differences between optical and electron microscopy. Soot comprises of agglomerates with a diameter of up to several hundred nanometers. They are made of fine structures that comprise of spherical primary molecules. Soot formation commences with the pyrolysis of fuel molecules along the formation of polcyclic aromatic hydrocarbons (Vander Wal & Tomasek, 2004). The most crucial precursor in the formation of higher hydrocarbons is acetylene (C2H2). Ladommatos and Balachndran (2011) assert that the molecular structure of various hydrocarbons influence soot formation. Gulder (2007) adds that the fuel structure also impact on the soot structure. Vander Wal and Tomasek (2004) showed that the soot particles that are generated by ethanol, benzene, and acetylene have different reactivity and structural order. Soot derived

Research Project, Focus, Type Essay Example | Topics and Well Written Essays - 500 words

Research Project, Focus, Type - Essay Example An entrepreneur could not commence a new venture or expand an existing business without accurate and updated information. Nonetheless, the pertinent information about the chosen country, economy, political conditions, laws and regulations, environment, technology, demographics, psychographics, behavioral, cultural and social factors, competitors and market potential is obtained through secondary and primary research. For instance, this marketing research and data collection should be considered as a useful project, because it becomes essential for survival, growth and sustainability of a business entity. The marketers than analyse this information and use for innovation, branding and differentiation. The information garnered will be analyzed and evaluated to develop certain alternatives and policies that could benefit the restaurant as a whole. For instance, the research project will help identifying new business opportunities followed by gaps in market. This would later benefit in expansion and betterment. In addition, the research will study societal changes, purchasing power and consumption trends after which we could improve our existing marketing and advertising campaigns, internal display and food products. The research will include primary (through surveys, focus groups and interviews) and secondary (available online published articles, journals, reviews, reports etc.) information. In addition, it would be comprehensive and descriptive in nature because the researcher will cover all major marketing related issues and points. The economic recession has resulted in massive unemployment and decline in consumer purchasing power (real incomes); therefore, customers demand high quality food products at reasonably lower prices. In other words, price factor will now play the most important role in success and prosperity of the restaurant in tough economic conditions. The literature would be gathered initially through secondary research because it is easily available and cheaper than primary (first hand) information. Websites, online databases, digital communities (Face Book, twitter, my space etc) and web logs may provide sufficient literature that could be used as a starting point. Any weaknesses and irrelevance will then be removed through collection of primary data.

Coca Cola Essay Example for Free

Coca Cola Essay Organizations need to change and adopt dynamic survival strategies to stay alive in uncertain political, social and economic environment (Hiatt and Creasy, 2003). All environmental factors present in the nature experience change on continuous basis. Human nature resists change, so managing that resistance requires well planned change management strategies. A structured approach to transfer organization, its people and processes from current state to a desired future state is called change management. This process gives employees the ability to accept changes in the existing environment of the business. Change can be of different type for example, change in technology, operations or strategies etc. company needs to implement individual strategies to cope with each type of change. Coca Cola Corporation is among one of the oldest corporations of the world. It has gone through many internal and external changes since it has been in existence. The company has used techniques of change management in order to survive from the consequences of those events. Coca Cola is a type of company that requires making changes in its products and business strategies according to the consumer expectations and external environment. Here in this study we would quote different examples from coca cola corporation’s history and will examine that what were the triggering events for opting the change and what strategies the company developed and implemented in order to successfully going through the transitioning process. Coca Cola is a type of company that requires making changes in its products and business strategies according to the consumer expectations and external environment. Here in this study we would quote different examples from coca cola corporation’s history and will examine that what were the triggering events for opting the change and what strategies the company developed and implemented in order to successfully going through the transitioning process. It is a well known fact that Coca Cola Corporation is an entrepreneurial venture started by one person who bought the formula from another firm and laid foundations of that beverages manufacturing firm. Current structure of the coca cola company is simple with minimal labor and management division. New system that can be adopted by the company may be the â€Å"machine bureaucracy† which has been defined as an organization with clearly defined hierarchy, well defined area of operations, standard operating procedures, proper rules and regulations, well division of labor, formal relationships among the member of organization, centralized decision making, technical competence and standardization of work. The company has faced a lot of external changes, for example in world war II, the company was able to manage its existing position at that time and also entered in many new markets and discovered new niches. The company established 64 plants across the world to supply drinks to the troops (Coca Cola Company, 2006-2011). The company also provided free drinks to soldiers which were the part of its strategy to become a patriotic symbol for the people of the country. Also it boosted the sales, so the company achieved two objectives by carefully planning to respond to that external environmental change. The plants developed by the company in war era helped its expansion after the war. The recent change management at coca cola is directed towards the intrinsic values and motivations of the employees and can be referred to as ‘employee engagement’. The change management process, together with internal branding programs is expected to bring about ideal behaviors in employees, which would align the operations of coca cola worldwide, and bring about efficiency throughout coca cola across all its business segments. Coca Cola Company can use two change management tools to make sure that all people who are required to be the part of change management process. These tools are Force Field analysis and AKADAR model. Force field analysis is a technique developed by Kurt Lewin to scrutinize the forces that are causing an opposition to change process (Bass, 2009). By doing Force Field Analysis, Coca Cola Company will be able to induct people who are in need of appropriate training. Another useful tool is AKADAR model which stands for Awareness, Desire, Knowledge, Ability and Reinforcement. Through AKDAR model, firm creates awareness about the need of change, generate desire in the people to help in transitioning process, give knowledge to the people that how they can help the change process, develop an ability in the people to go through the change and provide them with continuous reinforcement to withstand the change (CMLR, 2011). Coca cola hopes to bring about a thoroughly integrated system of communications, and focus on creating brand relationships with their employees. This would enhance the operations of Coca cola, as an integrated approach would mean all employees believe in engaging fully in the values, and this would become an inherent part of the employees at a personal level. For this purpose, employee engagement surveys are conducted twice every year for all the coca cola associates, which serve to highlight the areas where action is required, and further actions and implementations can henceforth be executed. Employee engagement is very significant to all segments of operations at coca-cola and has translated into performance in areas where employee engagement is higher. For coca-cola, an engaged workforce means: A more committed workforce Employee performance aligned with organizational objectives Employees have a clear idea of what is expected of them and what are the deliverables Customer experience focuses an inherent part of employees’ values, who strives to provide a better experience to the customers. Customer focus was identified as a central tenant of the multi-year engagement strategy to be implemented in 2011(Gee, 2011) Change in inevitable. Therefore, the focus should not be on avoiding change, rather bringing about a smooth transition towards the new change by communication about the change, and ensuring all parties of the change that it is for the best of all those involved. To successfully implement organizational change of any nature, a specific regards to organizational structure, design, culture, management and leadership is required to see whether the change would make a best fit with the organizational goals and objectives. To conclude, it may be said that communication can be a key element to successful change management. Communicate the changes to the employees, tell them why the change was inevitable and how they will benefit from the change. The management should itself adopt a positive attitude towards the change so that employees can follow their lead and welcome the change. Coca-cola as a company has a heritage of embracing change rather than resist it and it should translate into their future endeavors towards change management to ensure that the organization is best poised to market and environmental conditions.

Comparing Grovers Growing Up White In America and McBrides Work, What Color Is Jesus? :: Compare Contrast Essays

Comparing Grover's Growing Up White In America and McBride's Work, What Color Is Jesus? Racial issues have been predominant for the last fifty years. The two authors Bonnie Kay Grover and James McBride share their racial views in their respective works â€Å"Growing Up White In America† and â€Å"What Color Is Jesus?† Each author has a different view on exactly what race is and how it is used. Bonnie Kae Grover is a white female who believes that race has been used as a weapon. Specifically, she focuses on how white people use their color of skin to be controlling of other people. Her gripe is on the notion of â€Å"white culture.† She questions the validity of the statement and believes it is simply just American culture and those who think of it as white culture â€Å"just moved in like they’ve discovered it† (Grover 377). She examines some similarities in today’s â€Å"white culture† and the historical attitude of the exploring Europeans. The Europeans, when inhabiting North America, â€Å"just moved in and said they had God on their side and the Indians weren’t much anyway but a few of them could work for them sometimes if they behaved themselves, and the rest were lined up for disposal† (377). The Europeans believed themselves superior to the Indians; any and all action – fair and unfair alike – taken against the Indians was justifiable because it helped the Europeans. Grover argues that this irresponsible approach is the basis of the white culture. White culture is simply American culture taken and modified as seen fit by white people. James McBride focuses his essay on his parents. His mother was white and his father black. He felt confusion; which color was he? McBride remembers when he was ten, he approached his mother with the question while she was working on the kitchen table. Her thoughtful response was only one word: â€Å"[p]liers† (391). He was not the only one in the family to have this question. His older brother took it an extra step and during Sunday school asked the reverend about the skin color of Jesus.

Irony Literary Analysis Essay

Tragedy is a dramatic form that was first developed in ancient Greece. A  tragedy usually has these characteristics: The main character is involved in a struggle that ends in disaster. This character, often called the tragic hero, is a person of high rank who has the respect of the community.  The tragic hero’s downfall is usually the result of some combination of fate, an error in judgment, and a personality weakness often called a tragic flaw. Once the tragedy is in motion, the downfall is usually inevitable. The tragic hero gains wisdom or insight by the play’s end. Tragedy arouses feelings of pity and fear in the audience. Spectators pity the plight of the main character and fear that a similar fate might befall them. A tragic drama may also suggest that the human spirit is capable of remarkable nobility even in the midst of great suffering. An allegory is a story with more than one layer of meaning: a literal meaning and one or more symbolic meanings. The characters, settings, and themes in an allegory are symbols of ideas and qualities that exist outside the story. The Crucible is an allegory, because Miller uses one his ­ torical period and setting (seventeenth-century New England) to comment on another (1950s America). The tragedy that occurs in Salem is an allego ­ ry for the anti-Communist hysteria that gripped the United States during the 1950s. As you read, notice how the events in Salem echo the events surrounding the McCarthy hearings to tragic effect.

Salvador Dali’s Childhood

â€Å"The two greatest strokes of luck that can happen to a painter are (1), to be Spanish, (2) to be called Salvador Dali. â€Å"Even today, Salvador Dali is considered one of the most influential and successful surrealist artist in history, yet not much is known about his childhood; and what we do know is incredibly vague. His childhood is what influenced many of the famous symbols and styles found in his paintings and made them what they are. Salvador Dalais surrealist artwork is amazingly vivid and filled with symbols from both his childhood and adulthood.From the symbolic melting clocks to the lesser known fried eggs. Even from a young age, Salvador was a very eccentric and somewhat disturbed child. â€Å"When I was three I wanted to be a cook. At the age of six I wanted to be Napoleon. Since then my ambition has increased all the time, (surrealists. Co. UK/ Dali:pH). Dali surely had many eccentric ambitions. From a cook too Napoleon, this now legendary painter has much histo ry that is clearly shown in his art. Dalais childhood was full of perverse and sadistic elements that were to become a major art of his symbolist paintings,† (surrealists. Co. UK/Dali:pH). As a young boy, Dali began to show signs of aggression, because of this he was sent away to live with a family friend who happened to be an artist. There he developed the want to become an artist and explored other passions, such as pain. He was masochistic and would throw himself down the stairs because the pain influenced him. He had said, â€Å"The pain was insignificant, the pleasure was immense. More often than not, his desire to be different came out as violence. In one incident, pushing his friend Off 15-foot bridge to watch him fall. Salvador eccentricities didn't fade with age, if anything they intensified. â€Å"Almost everything he tried, he did well. He was a writer, a movie maker†¦ † (biography/people/ Salvador-Dali-40389? Page=1). Dali himself said that he would no t be forgotten, he made sure of this by spreading his name to all sections of the artistic community.He designed ‘dream sequences' for Alfred Hitchcock to use in his 1945 movie Spellbound, (biography/people/Salvador-Dali-40389? Page=1). He also collaborated with Walt Disney to create the short animated film, Destine. â€Å"Bizarre and outlandish, Dali often took part in performance pieces that were despised by critics,†(biography/people/ Salvador-Dali-40389? Page=1). Because he was never broody or quiet critics never took him seriously. To them an artist was secretive and every piece was to be a show case of the artist's deep sorrow and talent.Salvador really Just wanted his artwork to be seen by the masses, so much so that he created paintings specifically for companies o sell their products. Dalais matter of revealing the gap between reality and illusion influenced all manner of modern artists. Beyond developing his own symbolic language, Dali elaborated a way to repr esent the inner mind,† (transitory. Org/artist-Dali- Salvador. HTML) He used vivid imagery to show what he thought and felt. He knew how to create hypnotic art that memorized and inspired like no other artists could. On his death bed scientists asked if the melting clocks represented Einstein theory of lethality, he said ‘No its based on my perception of Camembert cheese melting in the sun. ‘ Dalais symbolism seems very profound and thoughtful and at some level it is. Ants and flesh represent an encounter with a wounded bat. Food like the fried eggs comes from Dalais childhood urge to be a cook. Instruments of mutilation are a tribute to Dalais sad-masochistic behavior and thoughts. His art has always Just been the thoughts and memories of an eccentric life and mind. Nothing more and definitely nothing less.

Radiologic Technologist (Radiographer or X-Ray Technician) Essay Example

Radiologic Technologist (Radiographer or X Radiologic Technologist (Radiographer or X-Ray Technician) Paper Radiologic Technologist (Radiographer or X-Ray Technician) Paper Radiologic Technology is the science of using radiation to produce the images that radiologist use to diagnose injury and disease. Radiologic technologist or radiographer function as part of the health care team by assisting physicians, namely radiologist, in procedures, operating imaging equipment, positioning, and care of patients. . The radiographer is also responsible for patient and personal safety, as well as upkeep of equipment. To be able to perform these duties, radiographers must follow guidelines set down by various organizations and be able to perform duties in a professional, caring manner. To become radiologic technologists, students must graduate from an accredited radiologic technology program and pass the national board exam, known as the American Registry of Radiologic Technologists (ARRT). There are both college-based and hospital-based programs. The Joint Review Committee on Education in Radiologic Technology (JRCERT) accredits these programs. Training includes radiation safety, proper positioning and procedures, patient care, as well as ethical and legal standards. With experience and additional training, staff technologists may become specialists, performing CT scanning, ultrasound, cardiovascular angiography, and magnetic resonance imaging as well as becoming an educator. Experienced technologists may also be promoted to supervisor, chief radiologic technologist, and ultimately to radiographer manager. The ARRT is responsible for testing and provides certification for these advancement positions. Radiographers work in a variety of settings including hospitals, clinics and outpatient centers. The Joint Commission for Accreditation of Healthcare Organizations (JCAHO) accredits hospitals and makes sure hospitals maintain expected standards. Today, many hospitals are affiliated with Health Maintenance Organizations (HMO). All members of the health care team in these hospitals help keep costs down by promoting preventative care. They must be role models for good health to set an example for patients. The imaging department of a hospital is usually headed by the radiographer manager who works closely with radiologists and administration to establish policies and budgets. Under the manager is the chief technologist who schedules staff, maintains supplies, and sees to day to day operations. Staff radiographers must follow the chain of command to function as part of the health care team. Radiologic technologists are represented on a national level by the American Society of Radiologic Technologist (ASRT). The ASRT helps provided educational opportunities, monitors legislation that affects the profession, and establishing standards of practice. Each state also has their own society that helps contribute to the advancement of the profession. The society established a Scope of Practice, which defines responsibilities, required qualifications and duties, allowed to perform by radiographers. A Position Description defines specific duties of the various specialty imaging areas as well as staff radiographer. Local standards prevail over national or state standards. The ASRT and the ARRT developed a Code of Ethics for technologist to provide a high standard of conduct. The principles cover prejudices, professional behavior, confidentiality, and safety responsibilities. By adhering to these principles, technologists can minimize the possibility of having a lawsuit brought against them. Another important aspect of the job is to take care of personal physical and mental well being. To be able to help others, radiographers must maintain good health and be able to cope with stresses of work and personal life. In Maslow’s hierarchy of need, self-actualization is the ultimate goal. When technologist achieve this goal they are able to cope with stresses, and have the ability to focus on patients to provide quality care.

A Biography of Geographer Ellen Churchill Semple

A Biography of Geographer Ellen Churchill Semple Ellen Churchill Semple will long be remembered for her contributions to American geography despite her association with the long-disregarded topic of environmental determinism. Ellen Semple was born in the midst of the Civil War in Louisville, Kentucky on January 8, 1863. Her father was a fairly affluent owner of a hardware store and her mother took care of Ellen and her six (or possibly four) siblings. Ellens mother encouraged the children to read and Ellen was especially enamored with books about history and travel. As a young person, she enjoyed horseback riding and tennis. Semple attended public and private schools in Louisville until she was sixteen when she headed off to college in Poughkeepsie, New York. Semple attended Vassar College where she earned her bachelors degree in history at the age of nineteen. She was the class valedictorian, gave the commencement address, was one of thirty-nine female graduates, and was the youngest graduate in 1882. Following Vassar, Semple returned to Louisville where she taught at the private school operated by her older sister; she also became active in local Louisville society. Neither teaching nor social engagements interested her enough, she desired much more intellectual stimulation. Fortunately, she had a chance to escape her boredom. To Europe In an 1887 trip to London with her mother, Semple met an American man who had just completed a Ph.D. at the University of Leipzig (Germany). The man, Duren Ward, told Semple about a dynamic professor of geography at Leipzig named Friedrich Ratzel. Ward loaned Semple a copy of Ratzels book, Anthropogeographie, which she immersed herself in for months and subsequently decided to study under Ratzel at Leipzig. She returned home to finish work on a masters degree by writing a thesis titled Slavery: A Study in Sociology and by studying sociology, economics, and history. She earned her masters degree in 1891 and rushed to Leipzig to study under Ratzel. She obtained accommodations with a local German family in order to improve her abilities in the German language. In 1891, women were not allowed to be enrolled in German universities although by special permission they could be allowed to attend lectures and seminars. Semple met Ratzel and obtained permission to attend his courses. She had to sit apart from the men in the classroom so in her first class, she sat in the front row alone among 500 men. She remained at the University of Leipzeg through 1892 and then returned again in 1895 for additional study under Ratzel. Since she could not enroll at the university, she never earned a degree from her studies under Ratzel and therefore, never actually obtained an advanced degree in geography. Although she Semple was well-known in the geography circles of Germany, she was relatively unknown in American geography. Upon returning to the United States, she began to research, write, and publish articles and began to gain a name for herself in American geography. Her 1897 article in the Journal of School Geography, The Influence of the Appalachian Barrier upon Colonial History was her first academic publication. In this article, she showed that anthropological research could indeed be studied in the field. Becoming an American Geographer What established Semple as a true geographer was her outstanding field work and research into the people of the Kentucky highlands. For over a year, Semple explored the mountains of her home state and discovered niche communities that had not changed much since they were first settled. The English spoken in some of these communities still carried a British accent. This work was published in 1901 in the article The Anglo-Saxons of the Kentucky Mountains, a Study in Antropogeography in the Geographical Journal. Semples writing style was a literary one and she was a fascinating lecturer, which encouraged interest in her work. In 1933, Semple disciple Charles C. Colby wrote about the impact of Semples Kentucky article, Probably this brief article has fired more American students to interest in geography than any other article ever written. There was a strong interest in Ratzels ideas in America so Ratzel encouraged Semple to make his ideas known to the English-speaking world. He asked that she translate his publications but Semple did not agree with Ratzels idea of the organic state so she decided to publish her own book based on his ideas. American History and Its Geographic Conditions was published in 1903. It gained wide acclaim and was still required reading in many geography departments across the United States in the 1930s. Continue to Page Two Her Career Takes Off The publication of her first book launched Semples career. In 1904, she became one of the forty-eight charter members of the Association of American Geographers, under the presidency of William Morris Davis. That same year she was appointed Associate Editor of the Journal of Geography, a position she retained until 1910. In 1906, she was recruited by the countrys first Department of Geography, at the University of Chicago. (The Department of Geography at the University of Chicago was established in 1903.) She remained affiliated with the University of Chicago until 1924 and taught there in alternating years. Semples second major book was published in 1911. Influences of Geographic Environment further expounded on Semples environmental deterministic viewpoint. She felt that climate and geographic location was the major cause of a persons actions. In the book, she cataloged countless examples to prove her point. For example, she reported that those who live in mountain passes are usually robbers. She provided case studies to prove her point but she didnt include or discuss counter examples that could prove her theory wrong. Semple was an academic of her era and while her ideas can be considered racist or exceedingly simple today, she opened up new arenas of thought within the discipline of geography. Later geographic thought rejected the simple cause and effect of Semples day. That same year, Semple and a few friends took a trip to Asia and visited Japan (for three months), China, the Philippines, Indonesia, and India. The trip provided a tremendous amount of fodder for additional articles and presentations over the next few years. In 1915, Semple developed her passion for the geography of the Mediterranean region and spent much of her time researching and writing about this portion of the world for the remainder of her life. In 1912, she taught geography at Oxford University and was a lecturer at Wellesley College, the University of Colorado, Western Kentucky University, and UCLA over the course of the next two decades. During World War I, Semple responded to the war effort as did most geographers by giving lectures to officers about the geography of the Italian front. After the war, she continued her teaching. In 1921, Semple was elected President of the Association of American Geographers and accepted a position as a Professor of Anthropogeography at Clark University, a position she held until her death. At Clark, she taught seminars to graduate students in the fall semester and spent the spring semester researching and writing. Throughout her academic career, she averaged one important paper or book each year. Later in Life The University of Kentucky honored Semple in 1923 with an honorary doctorate degree in law and established the Ellen Churchill Semple Room to house her private library. Stricken with a heart attack in 1929, Semple began to succumb to ill health. During this time she was working on her third important book - about the geography of the Mediterranean. Following a lengthy hospital stay, she was able to move to a home adjacent to Clark University and with the help of a student, she published Geography of the Mediterranean Region in 1931. She moved from Worcester, Massachusetts (the location of Clark University) to the warmer climate of Ashevlle, North Carolina in late 1931 in an attempt to restore her health. Doctors there recommend an even milder climate and lower elevation so a month later she moved to West Palm Beach, Florida. She died in West Palm Beach on May 8, 1932 and was buried at the Cave Hill Cemetery in her hometown of Louisville, Kentucky. A few months after her death, the Ellen C. Semple School was dedicated in Louisville, Kentucky. Semple School is still in existence today. The University of Kentucky Geography Department hosts an Ellen Churchill Semple Day every spring to honor the discipline of geography and its accomplishments. Despite Carl Sauers assertion that Semple was a mere American mouthpiece for her German master, Ellen Semple was a prolific geographer who served the discipline well and succeeded despite tremendous obstacles for her gender in the halls of academia. She definitely deserves to be recognized for her contribution to the advancement of geography.

How are auctions important for the art market today Essay

How are auctions important for the art market today - Essay Example For example, in other industries like the real estate, once the construction of the house is complete, the builders and architects will mostly not have any meaningful relations with the particular building or house. However this is different in the art world since the artist will have a central correlation with the art they have created; in this context, the role the art market plays in the art world and the artist’s own career is somewhat intricate and can vary from one artist to another and from one region to another. It is with this in mind that I have split my essay into different categories. Firstly, I will discuss the art market as a whole before looking at the aspect of art valuation. The second area will be covering the determination of the price for a painting. Thereafter I will finish my essay with a conclusion on how all these aspects are important for the art market today as much as the contribution to how a painting or an art piece will be auctioned. Art Market Re cognition of art as a feasible and valuable alternative asset class has made a situation where the art market is increasingly being promoted purely as a means for monetary gains. New investments dealing in arts have been created in the last few years and this shows how the society has grown the confidence it has on the art market as a method of building wealth and as a way of diversifying the investment range. This art market is continuously growing even though it is a new and small market compared to other investment markets. According to Singer and Lynch (94), the art market is divided into four categories that are diverse. The fourth category is mostly for the illicit aspect of the art market. The first one is referred to as primary which deals with art that is in the open market for the first time; once the art has been sold it will be in the secondary possession thereafter if it is auctioned the tertiary stage will be under this category. This means that before an art is auctio ned it has to undergo probably the three faces (apart from the illicit market) and through the facets the value of the art piece might increase or decrease depending on the quality and the significance. Art valuation: Art valuation is the basis for dictating the significance of the art in question, whether the art is very good or very bad. This is an art-specific division of financial valuation. The process will involve giving an approximate value (valuation) or estimating the potential market value of works of art and thus this makes it more of a financial concern rather than an aesthetic concern (Fenner 28). The subjective views and opinions of the art also play a major role in the valuation process. The valuation itself will involve comparing the data and analyzing the trends of the art from various key players like collectors, auction houses, museums, curators and even art dealers among many other important art players. These key players will mostly arrive at a value that they w ill deem. The art market is dictated by the valuation which in turn determines whether an art is good or not. A good art will have a high market demand as many people will be after this piece of art and at the same time liquidity of the art means that the art is very easily sold without any impediments hence the art is deemed as a good art. Other factors that will make an art be good will include the valuation trend whereby if an art

Summary and criticism of book chapter Essay Example | Topics and Well Written Essays - 3000 words

Summary and criticism of book chapter - Essay Example Defeat in the war led to the break-up of the Monarchy, and this was unforeseen even until the summer of 1918 (Sked, 1989 ). The Habsurg army persevered till the very end. Had they been victorious, their Monarchy would not only have survived, but would also have expanded. In The Dual Monarchy chapter of the Decline and Fall of the Habsburg Empire, analyzes the position of Hungary within the Empire, the nationalist and economic growth problems, the rise of fresh political and social forces, cultural pessimism, and the foreign policy issues prior to 1914. These analyses are conducted in the light of the commonly known weaknesses that afflicted the Dual Monarchy, and it is meant to deduce what condition the Habsburg Empire was in before its collapse. The Habsburg Monarchy stretched from the territories that were under the rule of the junior Austrian branch of the House of Habsburg (1278–1780). This branch of rulers was succeeded by House of Habsburg-Lorraine (from 1780), between 1 526 and 1867/1918. Vienna was the official capital until it was temporarily replaced from 1583 to 1611, with Prague. The Habsburg ruled over the Austrian Empire from 1804 to 1867 the Habsburgs and the they moved onto ruling Austria-Hungary from 1867 to 1918 ruled the Austrian Empire and from 1867 to 1918 Austria-Hungary. ... The Hungarians were agitated significantly owing to the suppression they felt was being exerted on their call for a revolution. This suppression was backed by the Russians. However, the entire Hungarian agitation with Austria had been festering for many years, and the reasons for this were manifold. Towards the end of the 1850’s, a lot of Hungarian practiced a change of attitude, inclined to recognize the Habsburg dominion and scavenge the idea of a revolt. Their validation for this rest in the fact that while Hungary had right to full independence and self-government, the Pragmatic Sanction of 1713 foreign affairs were the similar for Austria and Hungary, When the Austrians were beaten at Koniggratz, it became crucial for them to counterfeit reconciliatory ties with Hungary in order to accomplish their lost esteem and power. The new foreign minister wanted to substantiate the previously stalled round of discussions with the previously delayed round of consultations with the H ungarians. In order seek Hungary’s hold up for the Monarchy, Emperor Franz Joseph compiled a deal with Hungarian powers yielding them the popular coronation as King, a separate parliament at Budapest, and the powers to set up laws for the lands that were to be governed by the Hungarian Crown. Initiating from1867, the allocation of common spending was set at 70% for Austria and 30% for the Hungarians. It was decided that this allocation would be revisited every 10 years, and by the year 1907, the Hungarian allocation was raised to 36.4% common expenditure was allocated 70% to Austria and 30% to Hungary. This split had to be discussed every 10 years, and, by 1907, the Hungarian allocation had

Answer 3 questions about art museums Essay Example | Topics and Well Written Essays - 250 words

Answer 3 questions about art museums - Essay Example The museum shop reminds patrons that the art works they are seeing are displayed by an organization that is reliant on funding and profit. This is a significant realization as it necessitates that the museum be considered with the same analytical lens as one would apply to traditional businesses. This has implications for nearly all decision-making in the institution. Another question is whether artists should strive to make art that resists being commercial. In these regards, it seems that there is nothing inherently wrong with being commercial, or using a commercial aesthetic. Artists that specifically attempt to cultivate commercial values, however, are witnessed as suspect compared to artists that more naturally and authentically produce their art. The notion that art can be produced naturally, or rather can be produced ‘natural’ and ‘authentically,’ however, is not entirely understood as even being

Electrostatic Ion Thrusters

Electrostatic Ion Thrusters Abstract The ion thrusters belong to the electric propulsion category and are used by modern spacecraft either to maintain their position relative to the Earth or to complete deep space missions. Their main characteristic is the high specific impulse which involves an efficient use of the propellant, a mandatory requirement for space activities where weight is the main restriction. The thrust is generated by the acceleration of ionised gas at very high velocities. The mechanism used to achieve the acceleration distinguishes these propulsive devices in two main categories: electrostatic and electromagnetic. In the first type, a potential difference accelerates the ions through the Coulombs force. In the second type the interaction of the ionised gas with a magnetic field generates the thrust through the Lorentzs force. This paper focuses on the analysis of the main features and architectures of the electrostatic ion thrusters. In the first part, the reasons why they are used for space applicat ions are explained. Afterwards, the propulsors physic and the working principles are illustrated with considerations on their advantages and limitations. Eventually, an overview of the field of applications and future design innovations is presented. Keywords: Ion thrusters, Hall thrusters, Feep Nomenclature EPElectric Propulsion ESAEuropean Space AgencyNASANational Aeronautics and Space AdministrationJAXAJapan Aerospace Exploration AgencyGEOGeostationary Orbit LEOlow Earth Orbit STPStationary Plasma Thruster Electrostatic ion thrusters are a major area of interest within the field of space applications. Thanks to the constant heightened of electrical power available in modern spacecraft the last two decades have seen a growing proliferation of this technology. The concept of electric propulsion has been theorized for the first time by Robert H. Goddard in 1906[1] and Herman Oberth in 1929[2] but it was not until 1948 that the research efforts on ion thrusters implementation on a spacecraft began. A considerable contribution was given by the work of Ernst Stuhlinger[1]. Early experimental tests started during the 50s and leaded to the first successful space test in 1964 with the SERT-1[3]. With the end of the Cold War and the Space Race the interest in these devices diminished but just for a short period. Today in fact ion thrusters are essential for a wide range of space missions. In this paper, after a brief explanation of the importance of high impulse thrusters for space applications, the three main architectures of electrostatic ion thrusters are presented. For each category the paper will look into the working principles, evolution over the years, applications in space mission and future development of the technology. The essential reason of the development of the ion thruster for space applications is the extremely high efficiency in the utilisation of propellant mass and the corresponding reduction of the launch costs, a critical parameter for the mission feasibility. Moreover this technology permits to performs deep-space missions otherwise inaccessible to conventional chemical rockets[4]. The reason lies in the Tsiolkovskys equation which can be derived from the Newtons law of momentum conservation: Where and are the final and the initial spacecraft mass respectively, is the velocity change and is the exhaust velocity. The equations shows that must be comparable to to have a significant fraction of final mass. Thrusters that provide a large propellant exhaust velocity compared to the mission will have a propellant mass that is only a small fraction of the initial spacecraft wet mass. Space mission are classified by the amount of velocity change needed for the orbital maneuvers, planetary mission for example requires velocity above 10 km/s[4]. Table 1:Characteristic velocity increments Mission [km/s] 1 year station keeping 10 LEO GEO 3.5 Earth Mars (return) 14 Earth Venus (return) 16 Earth Jupiter (return) 64 Earth Alpha Centaury (return) 30000 The exhaust velocity is directly proportional to the specific impulse, which can be seen as a measure of the propellant acceleration efficiency. The formulation is: where in the mass flow and the sea-level gravitational acceleration. Typical values of different propulsive systems are listed in table 2. It can be seen that the necessary velocity augmentation is much larger than the typical chemical rocket exhaust velocity, for this reason they are not suitable for this kind of missions. The latter is restricted by the intrinsic energy of the propellant, thermal limitations of the materials and frozen flow losses[4]. For electric thrusters the propellant and the energy source are independent and the specific impulse depends only on the energy deposed into the plasma[5]. Another key strength of ion thrusters is the high thrust efficiency: where is the available electric power and is the thrust. The equation shows that defined a large specific impulse leads to a very low thrust level which is a typical characteristic of ion engines. As a consequence this kind of thrusters requires a large amount of propulsion time, actually the opposite of what happens with chemical propulsion, characterised by high thrust levels over a short time. Table 2: Representative specific impulse and thrust levels of different propulsive systems [2] Propulsive system [s] Thrust [N] Liquid monopropellant 200 250 0.01 100 Liquid bipropellant 300 450 0.01 10^7 Solid propellant 200 300 1 10^6 Hybrid propellant 250 350 1 10^6 Ion Thrusters 2000 5000 Hall Thrusters 1500 2500 Feep Thrusters 5000 0.001 Electrostatic ion engines overcomes the limitations on the attainable exhaust speeds of conventional chemical rockets by the acceleration of the propellant through an electrostatic field. They can be divided into three main categories: Gridded Ion Thrusters, Hall Effect Thrusters and Field-Emission Electric Propulsion. In each of those the same main functions are performed: generation of the plasma, ions acceleration and ions neutralization. This configuration is the most fully developed and studied concept of electric propulsion [4]. The standard design comprises a metal ionisation chamber surrounded by magnets and three grids at the exit position. Acc elettroni 4.1 Ionisation and extraction Plasma is a ionised gas where approximately an equal number of positively charged protons and negatively charged electrons coexists[6]. The generation of positive particles requires an energy equivalent to the first ionization energy of the propellant. This amount of energy has an impact on the maximum attainable efficiency of the thruster that according to[5] can be written as: where is the ionisation energy and is the ion mass. The equation displays that the higher the ion mass and exit velocity (hence specific impulse) the higher the efficiency while decreases it. For this reason propellants with a low specific ionisation energy (alkali metals and noble gases) are preferred. The lower limit for the utilisation on these type of thrusters is 2000 s. Modern ion thrusters uses Xenon as a propellant since it has a large atomic weight and it easy to store because it is an inert gas, although Mercury and Caesium would be more performant propellants since their mass is much larger and the ionisation energy slightly greater, the higher toxicity prevents their use in experimental tests. Propellant Ionisation potential [eV] Atomic mass [AMU] Caesium 3.9 132.9 Mercury 10.4 200.6 Xenon 12.8 131.3 Krypton 14.0 83.8 Hydrogen 15.4 2.0 There are two mechanisms to create the plasma: the electron-bombardment and the relatively recent frequency excitation. In the first type electrons emitted from a thermionic or a hollow cathode collide with the propellant gas and generates positive ions. The electrons tend to reach the anode but the presence of an axial magnetic field generated by the magnets outside of the chamber causes a spiral path that improves their confinement and the ionisation efficiency. When an electron ionises an atom its energy decreases and when it drop below a certain level the magnetic field is not able to confine it anymore and it is extracted by the anode. In the second type the ionisation chamber is surrounded by a coil that induces an axial electro-magnetic field that ionises the gas. This method has some advantages such as the elimination of the cathode which improve the thruster life and a larger range of mass flow variation [7]. The number of ions created is equal to the number of electrons captured by the anode and an equilibrium condition is established. The plasma potential is slightly higher than the one of first grid, as a consequence the generated ions are attracted towards the exit of the chamber. In this region a sheet of the debaey length causes a natural curvature of the electric field and permits the extraction of the ions. Sheets debay 4.2 Acceleration The extraction of the ions from the ionisation chamber and the acceleration are performed by an electric field applied by three perforated grids. The first one acts as a screen while the second and the third accelerate and decelerate the gas respectively. The design of the grids is crucial and is based on a trade-off among performance, life and size. The grid holes diameter is defined by conflicting targets, it must be enough small to retain the unionised gas but maximised to provide an high grid transparency to extract the maximum possible number of positive ions[5]. An high potential difference is applied between the first and the second grid which accelerates the ions: where and are the ion charge and mass respectively and is the potential difference. The potential of the intermediate grid is negative in order to avoid the back-streaming of the electrons from the neutralizer cathode. The presence of positive particles only, during the acceleration, leads to an essential upper limit in the ion current density that can by provided and hence to the thrust density (N/m^2) of this devices with adverse consequences on their size[7]. The limit is dictate by the Child-Langmuir law[8]: that involves a thrust per unit of area of: where A is the cross area of the jet, d is the distance between the grids and is the electric constant. The formula demonstrates that to have compact device heavy ions and an high voltage are needed while the gap between the grids must be very small and this constitutes a thermal, electrical and structural challenge. Adopting Xenon and the maximum electric potential difference with nowadays technology level (typical value is 1000 Volt) the value which is very low. The exhaust speed achieved in this case, and hence the specific impulse, is excessively high considering the actual space mission requirements. Since just lowering the potential difference would reduce the already small value of thrust density a third deceleration grid is added[1]. Placing the acceleration grid at a negative potential the problem of the excessive velocity is solved without compromising the thrust density. The value of the required specific impulse determines the value of the third grid potential[5]. The single charge nature of the beam causes the repulsion between the accelerated ions which tend to diverge from the axial direction. Since the repulsion force is proportional to the beam diameter the latter is subdivided into small portions with order of magnitude equals to the grids distance. Since the electric field generated by the first grid is convergent the grid can be designed in such a way that particles trajectory became axial due to the repulsive force inside the beam. The grid geometry and the ions trajectory have a crucial roles in determining the thruster life, for this reason they are made of heavy metals such as Molybdenum, Graphite composites have been recently introduced[7]. Even though the grid are accurately designed, a secondary current of low energy ions hits the accelerator grid causing erosion. This current is caused by the Charge-Exchange Ionisation: some neutral atoms of propellant escaping from the ionisation chamber are struck by beam ions and a charge exchange happens[5]. The resultant low energy ions are accelerated towards the intermediate grid with enough energy to consume it over a long period. This process leads to a distortion of the grid holes that increases the damage until a structural failure of the grid occurs or the back streaming of electrons is not prevented anymore. 4.3 Neutralisation If the positive charged ions beam exiting from the thruster is not neutralised the thruster acquires a negative potential and causes the ions back-streaming. The neutralisation is achieved by the emission of a negative current by an hollow cathode positioned outside of the ions streams. Since the potential difference in this case is very low (electrons dont need to be accelerated) and the distance is an order of magnitude larger than the grid gap, the Childs law prevents the emission of a pure electrons current. The solution is the utilisation of a plasma bridge, a global neutral plasma with an electrons current inside. The hollow cathode is constituted by a tube of refractory materials and an orifice plate at the downstream end[9]. Inside the tube an insert made of tungsten is impregnated with a low work-function metal. The cathode is wrapped by an heater that allows electrons emission through thermionic effect when temperature reaches 1000ÂÂ °C[9]. Xenon is fed into the tube and electrons emitted from the insert are extracted by a keeper electrode downstream of the orifice. 4.4 Evolution of the technology and future development The first ion engine flight was the demonstrative mission Space Electric Rocket Test (SERT 1) in 1964[3], followed in 1970 by the SERT 2 whose two mercury thrusters achieved 2000 and 3700 hours of operations respectively providing 300 restarts[10]. The first use of gridded ion thrusters adopted for station keeping for commercial applications has been the XIPS-13 in 1997 for the PAS-5 (PanAmSat-5) communications satellite[5]. The subsequent generation of gridded ion engine, NSTAR, was developed by NASA JPL and Boeing. This thruster equipped the Deep Space 1 in 1998[11], a demonstration spacecraft that reached an asteroid and a comet. It provided 16000 hours of operation during the mission and over 40,000 hours of life testing[5]. Hundreds of papers have been published on its design and performance. In 1999 an evolution of the XIPS-13, the XIPS-25, was first lunched on a Boeing 702 Satellite[12]. This second generation is capable of providing orbit raising other than station keeping and momentum control. To date these thruster have been used for station keeping on Boeing 702 class satellites for more than 10 years, and 68 are currently operating in orbit on 17 spacecraft[5]. The next model used for station keeping was lunched on the telecom satellite Artemis in 2001 by the ESA. It used two T5 and two RIT thruster developed by Astrium[13]. The satellite reached a GEO orbit thanks to the ion thrusters used as a primary propulsion for recovery the chemical stage failure. In 2003 JAXA lunched the Hayabusa mission which equipped with four ion thrusters collected samples from an asteroid and returned to Earth in 2010[14]. Later in 2007 the Dawn[ mission of NASA was lunched to study two protoplanets in the asteroids belts, Vesta and Ceres, it has been the first time that a spacecraft orbited around two different solar system bodies, it would have been impossible without ion engines[15]. In 2009 the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission was lunched to study the variations of Earth gravitational field[16]. The key component of the mission were two ion thrusters for drag compensation. A new challenging mission named Bepi-Colombo is planned for October 2018 by a collaboration between ESA And JAXA[17]. The aim is the exploration of Mercury and will use four QinetiQ T6 ion thrusters. Another gridded ion thruster available in near future will be the NASA Evolutionary Xenon Thruster (NEXT)[17], Glenn Research Center manufacture d the test engines core ionization chamber, and Aerojet Rocketdyne designed and built the ion acceleration assembly[18]. A long duration test(LDT) was initiated in 2005 and was voluntarily terminated in 2014 after more than 50000 hours of operation and almost 1 ton of Xenon consumed. Post-test inspection highlighted the readiness of the thruster for space use[19][20]. It has been proposed for several future missions[21]. The first two flight units will be available in early 2019. Name Power [Kw] [s] T [mN] SERT 1 1.4 4900 28 XIPS 13 0.33 2570 18 NSTAR 0.5-2.3 3100 20-95 XIPS 25 4.5 3800 165 RIT 4.3 3-5000 150 T5 0.27-0.65 3-3500 10-25 T6 5.2 3500 40-200 NEXT 0.5-7 4200 237 The Hall thrusters are direct competitors of the gridded ion thrusters, even if they have a lower efficiency and specific impulse the thrust density is many times greater since both ions end electrons are accelerated and the Childs law is not a limit. The system is based on a fundamental effect discovered in 1879 by Edwin H. Hall[22], he showed that in presence of a perpendicular electric and magnetic field an electric current flows perpendicular to both. This phenomenon is exploited for the ionisation and the acceleration of the propellant. 5.1 Working Principles The ionisation chamber is axisymmetric, enclosed in two concentric cylinders. A radial magnetic field is applied through permanent magnets or solenoids, at the entrance of the chamber is situated a metallic anode from which the propellant is injected. At the cylinder end an hollow cathode emits an electrons beam that is divided into two parts. About 60-80% of the electrons are used to neutralise the positive ions ejected from the chamber, the remaining are trapped by the magnetic and the electric fields at the chamber exit and constitute a virtual plasma cathode[7]. The direct flows of the electrons towards the anode is prevented by the Hall effect which causes a spiral trajectory of the electrons. The propellant unleashed at the chamber entrance moves towards the electrons region and is ionised. Then the resultant electric field accelerates the ions. The long residence time of the electrons in the annular chamber, due to the magnetic confinement, makes the ionisation very efficient. Even if the magnetic field is determinant for the thruster operation the acceleration is achieved by a stationary electric force. The magnetic field that confines the electrons, which peaks at the exit, affects the ions trajectory causing a disturbance tangential torque that must be compensated and an high beam divergence angle of about 40ÂÂ ° that reduces the thrust efficiency and may cause electrostatic charging and interference to the satellite communications. The ionisation is much more efficient than in the gridded ion thrusters thanks to the lower ionisation energy requested and permits to achieve satisfactory efficiency 50-60% even with a relative low specific impulse. The considerable complexity of the plasma dynamic due to the presence if the magnetic and the electric field within the thruster causes fluctuations in the electron density that could cause severe damages, for this reason the electric potential is limited to 350 Volts. 5.2 SPT and TAL variants On the basis of the different materials that constitutes the cylinder wall in contact with the plasma Hall thrusters are divided into Stationary Plasma Thrusters (SPT), that are characterised by insulating walls made of boron nitride and silica compound (BN-SiO2), and Thruster Anode Layer (TAL) which have a conductive one[23]. Since the walls are continuously hit by some electrons and consecutively emits other electrons because of the secondary electron emission (SEE) effect, if the wall are metallic the resultant quantity of electrons is larger, the electric field is more intense and the potential drop occurs in a shorter distance. The result is more compact architecture with higher thrust density. The power loss are also related to life are strongly influenced by wall interactions. For SPT thrusters a significant amount of their power is lost on the dielectric channel walls due to electron bombardment. The metallic walls in TAL thrusters gather a smaller electron current since they have the same potential of the cathode which rejects the electrons and they have a small exposed area to the plasma, which limits the amount of ion and power lost to these surfaces. On the other hand the shorter chamber raises the intensity of the discharge current on the anode because the magnetic confinement is less effective [7]. 5.3 Evolution of the technology and future development The first Hall-Effect thruster to operate in space was the SPT-50 aboard the Soviet Meteor spacecraft in 1971 and was mainly used for satellite stabilization. Starting from that year more then 140 Hall thruster have been used in space[24]. Subsequently Hall engine of different power and size were developed with the introduction of the SPT-70 and SPT-100 in 1982. With their introduction in the west after the fall of the Berlin Wall in 1989 lot of research have been carried out by United States, France, Italy and Japan. The first US mission that adopted this technology was the demonstrator STEX spacecraft using D-55 TAL Hall Thrusters manufactured in Russia[25]. In 2004 the ESAs satellite SMART-1 adopted the Snecma PPS-1350-G, with a design similar to the SPT-100, to reach the lunar orbit from GTO[26]. The mission finished in 2006 with a controlled collision on the Moons surface. The probe covered more than 100 million kilometres, consuming just 82 kg of propellant. The joint venture between the Busek Company and Aerojet Rocketdyne leads to the development of the BTP-4000 designed for US military spacecraft as well as commercial satellites. In 2000 an agreement between Aerojet and Lockheed Martin Space System Company (LMSSC) developed the Hall Thruster Propulsion System (HTPS) for the next generation LMSSC geosynchronous spacecraft, this program adopted the BPT-4000 because of the ability to operate in a large range of powers and thrust modes allowing both station keeping and orbit raise[18]. Flight test qualifications and improvements lead to the discovery of the magnetic shielding phenomenon[27]. The achievement of a particular magnetic topology that essentially blocked the chamber wall erosion after 6000 hours, the developed erosion model enabled the possibility to predict andextent the engine lifetime. This thruster, used on the Advanced Extremely High Frequency (AEHF) communications satellites constitutes the currently most powerful Hall en gine in operation. In 2009 AR and Lockheed Martin developed the XR-12, the first Hall thruster in the 10kW class, it was intended for the US Air Forces TSAT constellation but after the cancellation of the program its use for future missions have been studied by NASA. In the recent years high power and thrust Hall engine have been investigated thanks to the increasing of the available spacecraft power. The consequent increase of thrust reduces the amount of time for the mission and permits a larger payload. In Europe Snecma developed the PPS-20k for the HiPER Project, an European project to study innovative electric propulsion technologies for future space transportation and exploration. In 2010 NASA promoted the Human Exploration Framework Team (HEFT) to investigate new technologies for a future human space exploration and high power Hall thrusters, thanks to the high power processing capabilities and extensive range of thrust levels, were chosen as a possible technology. The NASA-457Mv2 50-kW class, whose development started in 2004, has been tested during 2011 with satisfactory results. This model can be a potential point of start for future NASA exploration missions. Another step forward has been made with the development of the X3, a 100-kW class three-channel nested Hall thruster, designed by the Plasmadynamics and Electric Propulsion Laboratory (PEPL) at the University of Michigan, in collaboration with NASA and the Air Force Office of Scientific Research. Its performances up to 30 kW have been recently successfully tested and further measurements in order to analyse the complete operating envelopment up to 200 kW will be effectuated in the near future. Name Power [Kw]