Steve Jobs' Commencement Speech at Stanford University Essay

Steve Jobs' Commencement Speech at Stanford University - Essay Example This paper aims at identifying the main elements of Steve Jobs' Commencement Speech at Stanford University that enables the listeners to comprehend and connect with the speaker individually and collectively. In attaining this end, the research will examine the use of logos, pathos, and ethos to make the listeners understand the full speech and some components of the speech. This paper is in the form of rhetorical analysis. It tries to examine the main components of the speech and the kind of message it seeks to communicate to the audience. Rhetoric analysis â€Å"...lays bare or adequately interprets the secret life of a form of communication or speech†. In other words, the paper seeks to decode the main influence that the message seeks to exert on the mind of the listener. It tries to comprehensively examine the kind of information that Steve Jobs seeks to assert on the graduands by breaking down the speak. Rossenwasser and Stephen identify that â€Å"to analyze the rhetoric of something is to determine how that something persuades and positions its readers or viewers or listeners.† Ethos is about the credibility and the ethical appeal that the speaker has over the listener. It is mainly about how the audience relates to the speaker and the contacts that occur whilst the discussion goes on. Although there is no agreed standard in measuring the potency of ethos, the commonest method of evaluating this is to examine the emotions of the audience. The audience reacts by clapping and shouting to show their connection with the speaker. In this speech, there are so many emotions that are shown at different points in the interaction between Steve Jobs and the graduands. There were instances where the crowd screamed and there were other times where they clapped. Also, at the end of the entire speech, there was a standing ovation which gave an indication to a bystander that the speech had had some influence on the people present and this is very much evide nt of ethos. In analyzing the speech of Steve Jobs, there are four main components of ethos that can be conveniently examined to bring to bear the kind of connection that existed between the audience and speaker during the whole speech. Credibility refers to the trust and worth of a person's communication with another. This refers to how factors that cause a listener to place more reliance on the words of another person. First of all, the personality of Steve Jobs is one that grants him so much credibility. Being nominated as the speaker for the event in itself is something that comes with a lot of reputation for the event.

Film analysis paper Essay Example | Topics and Well Written Essays - 750 words

Film analysis paper - Essay Example The final concept is Zoe’s lack of openness to the therapist. These concepts will be explored in the film, and their application in the film will be determined. The consequences of this concept to the relationship will be determined (Lanham and Rowman 5). The most evident concept seen in this film is Zoe’s sex addiction. Sex addiction is the escalating and persistence in sexual engagement in spite of an increase in negative consequences to others or oneself. Just like another addiction efforts to stop this addiction can be in vain. This concept of sex addiction is observed in the initial scenes of the movie, right after Zoe visits Quinton Canosa. During her visit, she gets attracted to Quentin, the owner of Quinton Canosa. Their first meeting begins, and this is even more evident when Zoe takes the contract papers to him to sign for the beginning of their business partnership. Interestingly, this turns out to be a sexual connection for them (Lanham and Rowman 12). The concept of sex addiction is well applied in the film. Zoe is not fully satisfied with her husband and instead of talking things out she decides to look for comfort elsewhere. Zoe often meets up with Quinton where she finds the satisfaction of her addiction. She does this over and over, and even spends time at work thinking about her meetings with Quinton. It  affects her devotion to her career during one time she is set to meet with a client at a hotel, but she fails to turn up on time. She then arrives very late when the client is leaving and lies that her daughter fell sick. Addiction consequently affects Zoà «Ã¢â‚¬â„¢s relationship with her kids since she even misses out on occasions that are important to her children with excuses of being sick and sometimes having a lot of work in the office. However, this constant meeting with Quinton increases her addiction. She one time

Night of the Scorpion Essay Example for Free

Night of the Scorpion Essay In Vultures and Night of the Scorpion the description used is both vivid and horrific. The descriptions cause the reader to have mixed emotions throughout the poems; the poet changes his narrative perspective on things which in turn affects the reader; this is what makes the poems thought provoking and strange. The name Night of the Scorpion sounds like a scary monster film. This misleads the reader because this poem is not like that at all. Instead of the scorpion being evil, the poet describes the scorpions actions which lead us to feel sorry for it. Ten hours of steady rain had driven him to crawl beneath a sack of rice. The word driven suggests that the scorpion had no other choice. He is desperate to be safe and dry, so he crawls beneath a sack of rice. In this part of the poem, we dont see the scorpion as a monster as the title of the poems suggests. The sympathy for the scorpion is contrasted when the scorpion stings the mother. There is some mixed emotion in the reader; because we dont know whether the scorpion is innocent, because he needs somewhere to stay; or is he is evil as the title suggests, because he has unprovokedly stung the mother. Flash reflects the suddenness and sneakiness of the sting. His tail is described as diabolic, which means it is evil and devil like. The neighbours are quite selfish in that they see this as entertainment. The peasants came like swarms of flies. The mother obviously hated them coming to watch her suffer. The neighbours are sympathetic though and try to help the mother. Buzzed the name of God a hundred times to paralyze the Evil One. The idea of them buzzing is proving irritating to the mother, and refers to the idea of swarms of flies. The poet uses capital letters to describe Evil One. This makes the scorpion seem powerful, but in an evil way referring back to the title of the poem. The repetition of the letter P in the alliteration parting with his poison makes the reader feel the powerful and dangerous nature of the sting as the P sounds quick but agonizing. Similarly, the title of the poem Vultures makes the reader predict what the poem is about. In fact, the poem is not intended to be about vultures at all, the vultures are a metaphor for an idea that the poet wants to explore. The idea is that love can be found even in the most evil of beings. The descriptions of the vultures are harsh and frightening. His smooth bashed in head, a pebble on a stem rooted in a dump of gross feathers. Smooth bashed in head, is juxtaposition because it is impossible for something to be smooth and bashed in at the same time. A pebble on stem rooted in a dump of gross feathers, is a metaphor which is trying to giving the message that the vulture is just a thing with no important significance. Throughout the poem, the poet is giving the message of death, war and violence using very strong descriptive imagery. Yesterday they picked the eyes of a swollen corpse in a water-logged trench and ate the things in its bowel. The corpse in the trench is referring to a soldier who has died in a war trench. The alliteration in the first few lines helps set a negative tone. Drizzle of one despondent dawn. The drizzle brings the idea of rain, which refers to unhappiness. Despondent is bringing the idea of depression, despair, and hopelessness. Dawn is early in the day, meaning that nobody is around which brings the idea of loneliness. The hard accentuation of the D is ringing through these opening lines; the D is also referring to the idea of death, which this poem is revolving around. A vulture perching high on broken bone of a dead tree. The poet has personified the tree by giving it bones. Broken bones, is supporting the idea of war, where there are epic injuries and death. Sunbreak, means sunset. But the poet has used this word as a substitute to bring the idea of sadness; because even the sun which is stereotypical of being happy is sad and is breaking. There is no anticipation that this will be a happy or sunny poem and yet, unexpectedly, the vulture inclines his bashed in head to settle affectionately against his mate. The vulture is clearly not put off by the surrounding environment. This one description of love is immediately followed by more images of the repulsive and revolting as the eating habits of the birds are described vividly and stomach churningly. Both poems use unexpected changes of mood and dimension to engage the reader with the ideas of the poems. We start off feeling sympathy for the scorpion, but we are left thinking that this really is a diabolical creature. With the vultures, we feel that they represent something depressing and violent and yet we are surprised by the affection between the two birds. Both poets use descriptions of places and the activities carried out in them to develop the ideas explored in the poems. In Night of the Scorpion, the description of the activity of the neighbours makes the reader feel irritated by them, even though they are said to be there to help the mother. They are described in a way that makes them seem annoying like flies. The peasants came like swarms of flies This simile is continued, they buzz and fuss and click. The poet is trying to make the reader feel truly annoyed with them, by using strong imagery. This irritation is surprising to the reader because the neighbours are trying to help, but possibly a bit too enthusiastically. They bring equipment with them. More candles, more lanterns, more neighbours. The poet has deliberately made this into a type of list, because lists are annoying, which contrasts the neighbours. This repetition of more also helps the reader to feel that the neighbours are relentless and irritating as they try to help the bitten mother, because the help is gaining no results, so even more people is just plain annoying. The lack of sympathy from the poet can be shown in the repetition of they said.

MRI for Diagnosis of Mycetoma or Madura Foot

MRI for Diagnosis of Mycetoma or Madura Foot â€Å"Dot in Circle† sign — a unique attribute of mycetoma foot on MRI: a report of two cases Aggarwal A, Gupta M, Patel B N, Patel S B Abstract Mycetoma or Madura Foot is a chronic localized granulomatous disease characterized by exuberant granulomatous tissue formation involving the subcutaneous plane. It is most common in tropical countries. Diagnosis has been traditionally done by microbiological culture and histopathological tissue diagnosis but these are often difficult to obtain and frequently inconclusive. MRI has recently emerged as a promising technique for early and prompt diagnosis of Mycetoma with the description of a highly specific sign called as â€Å"Dot in Circle† sign. We hereby present 2 cases showing this characteristic â€Å"Dot in circle† sign on MRI and thereby establishing the diagnosis of Madura Foot. Patient 1 A 52-year-old male farmer by occupation presented with a painless swelling involving the left foot, which had been operated on elsewhere two times. Previous reports of surgery were not available. Examination revealed a non tender, large swelling involving whole of the left foot and the ankle joint. It was associated with numerous chronic discharging sinuses. (Fig 1) General examination was unremarkable and the soft tissue was normal. Rotuine blood and biochemical investigations were also unremarkable. Plain radiograph revealed a soft tissue mass in the left foot with advanced bony destruction mainly involving the tarsal, metatarsals and phalanges without any calcification. MRI scan was performed to evaluate the disease further. MRI showed a soft tissue mass lesion, diffuse hyperintensity involving subcutaneous tissue, muscles, and intermuscular fascial planes. There were also multiple focal fluid collections seen in the fascial plane with ulceration of overlying skin. The mass demons trated characteristically conglomerate areas of multiple, inconspicuous, small 3–4 mm oval to round hyperintense lesions, which were separated by a low-signal-intensity rim in the subcutaneous plane of the dorsum of the foot. The centre of few of these lesions showed a small hypointense focus, resulting in the dot-in-circle sign (Figs. 2, 3). The underlying bones showed cortical erosions mainly involving the tarsal, metatarsals and phalanges. On the basis of the above clinical and radiological findings, a diagnosis of mycetoma foot was put forward. A biopsy was performed to confirm the diagnosis which revealed granulomatous inflammation and presence of eumycetoma (Fig. 4). Patient 2 A 37 year old male, complained of mass in the left foot for the past 2 years. Examination revealed multiple numerous discharging sinuses with skin ulcerations. The discharging sinuses did not contain any grains which is usually pathognomonic of Madura mycosis. Plain frontal radiograph of the left foot shows soft tissue mass with severe destruction of the bone along with a palisade type of periosteal reaction mainly involving the tarsals and metatarsals (Figs. 5). The patient underwent MRI for evaluation and extent of the disease. Similarly, the lesion showed marked inflammatory changes in the left foot with cortical erosion, with micro-abscesses formation. The characteristic dot in circle sign (Figs. 6) was described and diagnosis of mycetoma foot was made. The patient underwent an excision biopsy. Histopathology showed eumycetoma. Images Figure 2. T2-weighted axial MR cut sections  of the left foot shows extensive inflammatory  changes. Multiple hyperintense lesions which were small and round in shape and separated by tissue of low signal intensity  are noted. Some of these lesions (arrows) show a  central small focus of hypointensity, resulting in the characteristic  dot-in-circle sign. Figure 3 T2-weighted fat-saturated coronal MR image of  the left foot shows multiple microabscesses separated by  a low-intensity matrix seen posteriolaterally. Marked inflammatory changes with multiple fluid collections are noted in the fascial plane. Figure 4 Haematoxylin and Eosin( HE) : Fungal organisms  surrounded by granulation tissue. Figure 6 T2-weighted axial MR image  of the left foot shows extensive inflammatory  changes with cortical erosion. Multiple small spherical  hyper-intense lesions separated by tissue of low signal intensity  are noted. Some of these lesions show a  small foci of hypointensity centrally, resulting in the  dot-in-circle sign. Note the presence of multiple  microabscess. Discussion Madurai Mycosis is a chronic granulomatous disease caused by 2 group of organisms, the Eumyces which are also called as true fungi or eumycetoma, and the Actinomyces, which are the filamentous form also called as Actinomycetales or actinomycetoma. The disease was first described in the Madurai district in the state of Tamil Nadu, hence the eponym Madura foot. The infective organisms are normal inhabitants of the soil and cause infection by direct implantation into the skin, most commonly the foot in individuals walking bare foot. Patients classically present with multiple subcutaneous nodules which are characteristically painless. These may give rise to fistulae formation, often associated with a purulent discharge. The disease progresses slowly and over long term leads to abscess formation, sinus tracts, osteomyelitis, and fistula formation ultimately resulting in severe deformity and disability if treatment is not provided [4] . Histologically the disease is characterized by formation of so called ‘‘grains’’, which are found embedded in the abscesses. These grains are nothing but aggregates of the organism and are surrounded by extensive granulation tissue. Initially there is soft tissue swelling with induration which later progresses to form multiple discharging sinus with or without bone involvement. [5] Radiological investigations play a significant role in arriving at the diagnosis swiftly especially since tissue cultures are seldom diagnostic. Radiographs may be normal early in the disease process but later show varying degree of soft tissue swelling with destruction of the bone in form of sclerosis, cavity formation and classical palisade type of periosteal reaction. This is followed by expansion of the bone with scalloping of the cortex or osteoporosis. This condition mimics bacterial osteomyelitis but in mycetoma the bones are usually detsroyed from the outside, giving rise to characteristic â€Å"Moth eaten appearance†. [2] The â€Å"Dot in circle† sign has emerged has a highly specific sign for the diagnosis of this condition and is based on the understanding of the pathogenesis of the disease process. It reflects the unique pathological feature of mycetoma and consists of multiple small round hyperintense lesions of size measuring around 3-5 mm surrounded by a hypointense rim. The small hyperintense lesions represent the granulation tissue and the surrounding hypointense rim represents the intervening stroma having fibrous septations. The low-signal intensity dot in the centre is due to the presence of fungal grains which causes a susceptibility effect on MRI. This is a unique appearance and is easily recognisable in mycetoma. [1] This sign was proposed by Sarris et al. in 2003 on T2-weighted, STIR, and T1-weighted fat-saturated gadolinium enhanced images. Conclusion We conclude by saying that mycetoma is a severe debilitating disease with high morbidity. Until now the diagnosis of the disease was limited to clinical picture supplemented by biopsy and microbiological culture which were difficult to obtain and proved to be inconclusive in many cases. MRI has emerged as an excellent investigation in mycetoma and helps to arrive at the diagnosis much earlier in the course of disease thereby further helping in reducing the morbidity and rate of complications. Awareness of this characteristic sign is important in view of the scarcity of reports that describe it in the literature and with increasing use of MRI in the evaluation of soft tissue tumours. [3] Ref: S, Betty M, Manipadam MT, Cherian VM, Poonnoose PM, Oommen AT, et al. The â€Å"dot-in-circle† sign A characteristic MRI finding in mycetoma foot: A report of three cases.Br J Radiol.2009;82:662–5. Mycetoma revisited. Incidence of various radiographic signs. Abd El-Bagi ME, Fahal AH Saudi Med J. 2009 Apr; 30(4):529-33. Kumar J, Kumar A, Sethy P, Gupta S. The dot-in-circle sign of mycetoma on MRI.Diagn Interv Radiol.2007;13:193–5. Lewall DB, Ofole S, Bendl B. Mycetoma. Skeletal Radiol 1985; 14:257–262. Magana M. Mycetoma, some clinical and histopathological features.Turk J Dermatopathol.1994;3:94.

Convergence in Technology Essay -- Essays Papers

Convergence in Technology The concept of a â€Å"global village† or a united community around the world has only in these last few years become a concept widely thought of. However, it seems that the idea of a large-scale sharing of information has long been developing, whether intended or not. The tools of communication have long served a single purpose, that of transmitting information from people to people. Direct communication was long ago realised with sign language and speech, but when people spread out, a kind indirect communication was needed. Thus we created (or rather, hired) the messenger. (Necessity is the mother of invention.) This evolved later into a postal service, connected around the world by a network of synchronised offices of a similar nature. For a long time, indirect communication was the only way to communicate over long distances. Once the telegraph came along, however, people were able to instantly communicate information over long distances. This evolved somewhat into the telephone, which spawned the radio and television. As these were developed, the efficiency and clarity of these transmissions improved, and this allowed the world to know what was happening anywhere else in the world at any given time. At this same time, programmable computers were finally coming to be used. Information was input to these machines and stored on tapes that could be put onto different computers to be run. This paralleled postal mail in a form of indirect communication. However, computers were also already based in intercommunication, because computers are systems of smaller functioning devices connected to perform a function or process. The evolution of computers’ communicating then evolved by extending direct connections between these large systems, sharing information. With the invention of the modem, computers could communicate piggybacking a system that people already used. As the modem developed, communications speeds increased. The state of convergence began when people were communicating increased types of information through these computers. First program data, statistics, stock market quotes, news, specific interest information, and finally personal information. Computers became a method of communication within themselves. The increased usage of modems for things like e-mail and on-line forums came about even... ... to use our computer, connected through the internet via our TV cable outlet and displayed on our High-Definition TV, to watch a â€Å"TV show† broadcast via the internet. The ultimate point of convergence I envision for the future is a single fibre-optic cable in our homes (perhaps brought to us by ShawTel?) as a conduit to what we know now as the Internet. Fad appliances like WebTV will be eliminated due to their inadequateness and will be replaced by integrated systems within a household. They will provide for our entertainment needs with interactive broadcast programs, news reports of only the stories or areas we request, and communication via a video and audio connection to anyone, anywhere in the world. This battle for supremacy over who will control the future of communication will be fought largely between the telecommunications companies and the Cable TV companies. Perhaps mergers will be sought, or some companies will be run out of business because of their inability to keep up. Millions of dollars will be lost and billions will be made, but the end product will create a closely-knit global community, able to communicate instantly regardless of language or location.

Governmental Family Policy Essay -- Women Feminist Papers

Governmental Family Policy The modern working woman is struggling to balance work and family. The Second Wave of feminism has pushed her into the workforce, promising its ideals of equality in wages and in the home. However, many women find themselves in a world that devalues their work in home and in the workplace. Our society has not yet caught up to the Third Wave of feminism, which attempts to break down the traditional gender roles our constructions of work and family are based on. Many are hoping that government intervention through work policies that reflect the demands of an egalitarian family will be able to propel men and women out of the "stalled revolution". One must now address the question why the United States government is not following the lead of other industrialized nations if they are so supportive of "family values" and "moral values." Until there is a public outcry that can no longer be ignored, which is fast-approaching, the government can continue playing with words in order to avoid accountability. The problem exists with how these policies are categorized. The common term applied to such policies is "social benefits." This language alludes to the "social welfare state"-an ideal a liberal democracy like America does not strive to uphold. The American attitude for such concerns is usually along the lines of "you have your rights, now work it out for yourself." However, it is crucial to break down the relation between these family-friendly policies and the word "benefits." Progressive policies do not predominantly "benefit" working mothers. Without such policies, women cannot pursue their right to earn a living in the same way a man could. Earning a living is not a "benefit," equal opportunity fo... ...ing Job For Kids." 21 Jan. 2003 http://lexis-nexis.com Coltrane, Scott. Family Man. New York: Oxford UP. (1996). Contemporary Women's Issues. March 2003. Vol. 52, No.2. http://lexis-nexis.com De Pasquale, Lisa. "The PC Workplace." The Washington Times. 27 April 2003. http://lexis-nexis.com English, Holly. "Workplace Issues; When employers deal with 'gender issues,' they need to include men." Legal Times. 10 Nov. 2003. http://lexis-nexis.com Fuss, Diana.. "Inside/Out." Critical Encounters: Reference and Responsibility in Deconstructive Writing. New Brunswick: Rutgers University Press, 1995. 233-240. Hochschild, Arlie. The Second Shift. New York: Rutledge Publishing, Inc. (1995). Gerson, Kathleen and Jacobs, Jerry A. Changing the Structure and Culture of Work. Journal of Women's History. September 2003. Vol. 15, No.3. http://lexis-nexis.com

Cryogens Essay

Cryogens are effective thermal storage media which, when used for automotive purposes, offer significant advantages over current and proposed electrochemical battery technologies, both in performance and economy. An automotive propulsion concept is presented which utilizes liquid nitrogen as the working fluid for an open Rankine cycle. The principle of operation is like that of a steam engine, except there is no combustion involved. Liquid nitrogen is pressurized and then vaporized in a heat exchanger by the ambient temperature of the surrounding air. The resulting high – pressure nitrogen gas is fed to the engine converting pressure into mechanical power. The only exhaust is nitrogen. The usage of cryogenic fuels has significant advantage over other fuels. Also, factors such as production and storage of nitrogen and pollutants in the exhaust give advantage for the cryogenic fuels. INTRODUCTION The importance of cars in the present world is increasing day by day. There are various factors that influence the choice of the car. These include performance, fuel, pollution etc. As the prices for fuels are increasing and the availability is decreasing we have to go for alternative choice. Here an automotive propulsion concept is presented which utilizes liquid nitrogen as the working fluid for an open Rankine cycle. When the only heat input to the engine is supplied by ambient heat exchangers, an automobile can readily be propelled while satisfying stringent tailpipe emission standards. Nitrogen propulsive systems can provide automotive ranges of nearly 400 kilometers in the zero emission mode, with lower operating costs than those of the electric vehicles currently being considered for mass production. In geographical regions that allow ultra low emission vehicles, the range and performance of the liquid nitrogen automobile can be significantly extended by the addition of a small efficient burner. Some of the advantages of a transportation infrastructure based on liquid nitrogen are that recharging the energy storage system only requires minutes and there are minimal environmental hazards associated with the manufacture and utilization of the cryogenic â€Å"fuel†. The basic idea of nitrogen propulsion system is to utilize the atmosphere as the heat source. This is in contrast to the typical heat engine where the atmosphere is used as the heat sink. PARTS OF A LIQUID NITROGEN PROPULSION CYCLE The main parts of a liquid nitrogen propulsion system are: 1.Cryogen Storage Vessel. 2.Pump. 3.Economizer. 4.Expander Engine. 5.Heat exchanger. The parts and their functions are discussed in detail below: Cryogen Storage Vessel: The primary design constraints for automobile cryogen storage vessels are: resistance to deceleration forces in the horizontal plane in the event of a traffic accident, low boil-off rate, minimum size and mass, and reasonable cost. Pump: The pump is used to pump the liquid nitrogen into the engine. The pump which are used for this purpose have an operating pressure ranging between 500 – 600 Psi. As the pump, pumps liquid instead of gas, it is noticed that the efficiency is high. Economizer: A preheater, called an economizer, uses leftover heat in the engine’s exhaust to preheat the liquid nitrogen before it enters the heat exchanger. Hence the economizer acts as a heat exchanger between the incoming liquid nitrogen and the exhaust gas which is left out. This is similar to the preheating process which is done in compressors. Hence with the use of the economizer, the efficiency can be improved. The design of this heat exchanger is such as to prevent frost formation on its outer surfaces. Expander: The maximum work output of the LN2 engine results from an isothermal expansion stroke. Achieving isothermal expansion will be a challenge, because the amount of heat addition required during the expansion process is nearly that required to superheat the pressurized LN2 prior to injection. Thus, engines having expansion chambers with high surface-to-volume ratios are favored for this application. Rotary expanders such as the Wankel may also be well suited. A secondary fluid could be circulated through the engine block to help keep the cylinder walls as warm as possible. Multiple expansions and reheats can also be used although they require more complicated machinery. Heat Exchanger: The primary heat exchanger is a critical component of a LN2 automobile. Since ambient vaporizers are widely utilized in the cryogenics and LNG industries, there exists a substantial technology base. Unfortunately, portable cryogen vaporizers suitable for this new application are not readily available at this time. To insure cryomobile operation over a wide range of weather conditions, the vaporizer should be capable of heating the LN2 at its maximum flow rate to near the ambient temperature on a cold winter day. Since reasonable performance for personal transportation vehicles can be obtained with a 30 kW motor, the heat exchanger will be sized accordingly. For an isothermal expansion engine having an injection pressure of 4 MPa, the heat absorbed from the atmosphere can, in principle, be converted to useful mechanical power with about 40% efficiency. Thus the heat exchanger system should be prudently designed to absorb at least 75 kW from the atmosphere when its temperature is only 0 °C. POWER CYCLE There are many thermodynamic cycles available for utilizing the thermal potential of liquid nitrogen. These range from the Brayton cycle, to using two- and even three-fluid topping cycles, to employing a hydrocarbon-fueled boiler for superheating beyond atmospheric temperatures. The easiest to implement, however, and the one chosen for this study, is shown below. This system uses an open Rankine cycle. The states involved in the temperature – entropy diagram for the open rankine cycle is described below. State 1 is the cryogenic liquid in storage at 0.1 MPa and 77 K. The liquid is pumped up to system pressure of 4 MPa (supercritical) at state 2 and then enters the economizer. State 3 indicates N2 properties after it is being preheated by the exhaust gas. Further heat exchange with ambient air brings the N2 to 300 K at state 4, ready for expansion. Isothermal expansion to 0.11 MPa at state 5 would result in the N2 exhaust having enough enthalpy to heat the LN2 to above its critical temperature in the economizer, whereas adiabatic expansion to state 6 would not leave sufficient enthalpy to justify its use. The specific work output would be 320 and 200 kJ/kg-LN2 for these isothermal and adiabatic cycles, respectively, without considering pump work. While these power cycles do not make best use of the thermodynamic potential of the LN2, they do provide specific energies competitive with those of lead-acid batteries. ADVANTAGES Liquid nitrogen automobiles will have significant performance and environmental advantages over electric vehicles. A liquid nitrogen car with a 60-gallon tank will have a potential range of up to 200 miles, or more than twice that of a typical electric car. Furthermore, a liquid nitrogen car will be much lighter and refilling its tank will take only 10-15 minutes, rather than the several hours required by most electric car concepts. Motorists will fuel up at filling stations very similar to today’s gasoline stations. When liquid nitrogen is manufactured in large quantities, the operating cost per mile of a liquid nitrogen car will not only be less than that of an electric car but will actually be competitive with that of a gasoline car. Compared to fossil fuels: The process to manufacture liquid nitrogen in large quantities can be environmentally very friendly, even if fossil fuels are used to generate the electric power required. The exhaust gases produced by burning fossil fuels in a power plant contain not only carbon dioxide and gaseous pollutants, but also all the nitrogen from the air used in the combustion. By feeding these exhaust gases to the nitrogen liquefaction plant, the carbon dioxide and other undesirable products of combustion can be condensed and separated in the process of chilling the nitrogen, and thus no pollutants need be released to the atmosphere by the power plant. The sequestered carbon dioxide and pollutants could be injected into depleted gas and oil wells, deep mine shafts, deep ocean subduction zones, and other repositories from which they will not diffuse back into the atmosphere, or they could be chemically processed into useful or inert substances. Consequently, the implementation of a large fleet of liquid nitrogen vehicles could have much greater environmental benefits than just reducing urban air pollution as desired by current zero-emission vehicle mandates.