Child Abuse and Neglect - Free Essay Example

Sample details Pages: 3 Words: 840 Downloads: 1 Date added: 2017/09/13 Category Advertising Essay Did you like this example? Resource Item 1 The New York State Educational Department (SED) oversees the training requirements for mandated reporters. Some examples of fields that require this training to obtain there license is Medical professionals, teachers, and social workers. As a child care provider in New York State we are required to report abuse when there is a reasonable cause, such as Maltreatment or if the child is being placed in imminent danger. Don’t waste time! Our writers will create an original "Child Abuse and Neglect" essay for you Create order Some indications of abuse or maltreatment are: †¢frequent bruises cuts or burns †¢Fear or going home †¢Inappropriate sexual behaviors †¢Sexual victimization of other children Obvious malnourishment †¢Frequent absences †¢Stealing or begging for food When any concerns are suspected they must telephoned immediately to the New York Statewide Central Register of Child Abuse and Maltreatment (SCR) which is open 24 hrs a day seven days a week. Immediate Notification is required so that immediate intervention can be provided by the department of social services. The Mandated reporters are not to notify the parents before or after it has been reported. Telephone numbers to report abuse or maltreatment are as follows: Mandated Reporter (800)635-1522 Public Hotline (800)342-3720 The SCR will determine if the information being provided can be registered as a report. Once the report is taken you must be sure to request the Call ID. If it is found that they cannot register the report with the provided information it must be clearly explained why and you can also request to speak to a supervisor for complicated situations. When a report is registered at the SCR, the local department of social services is immediately notified for investigation and follow-up. A local CPS caseworker will initiate an investigation within 24 hours. CPS intervention consists of an evaluation of the child and other children in the home and the development of a plan to meet the needs of the child and family. If there is an immediate threat to the childs life or health, CPS may remove the child from the home. If a call to the SCR provides information about an immediate threat to a child or a crime committed against a child, but the perpetrator is not a parent or other person legally responsible for the child, the SCR staff will make a Law Enforcement Referral (LER). The relevant information will be recorded and transmitted to the New York State Police Information Network or to the New York City Special Victims Liaison Unit. This is not a CPS report, and local CPS will not be involved. The Social Services Law provides confidentiality for mandated reporters and all sources of child abuse and maltreatment reports. OCFS and local CPS are not permitted to release to the subject of the report. Information regarding the source of the report may be shared with court officials, police, and district attorneys, but only in certain circumstances. If a mandated reporter makes a report with earnest concern for the welfare of a child, he or she is immune from any criminal or civil liability that might result. This is referred to as making a report in â€Å"good faith. † The Social Services Law specifies that no medical or other public or private institution, school, facility or agency shall take any retaliatory personnel action against an employee who made a report to the SCR. Anyone who is mandated to report suspected child abuse or maltreatment and fails to do so could be charged with a Class A misdemeanor and subject to criminal penalties. Mandated reporters can be sued in a civil court for monetary damages for any harm caused by the mandated reporters failure to make a report to the SCR. The New York State Education Department (SED) Office of the Professions oversees the training requirements for mandated reporters. Some categories—including teachers, many medical professionals, and social workers—need this training as part of their licensing requirement. The training may be included in their formal education program. The New York State Office of Children and Family Services (OCFS) is proud to be a certified provider authorized by SED to offer mandated reporter training, and has developed a comprehensive curriculum with content customized to medical professionals, educators, law enforcement personnel, day care providers, and human services staff. All training offered through OCFS, including the new two-hour self-directed online training course, the two-day Training for Trainers, and satellite video conferences, is accessible at no cost to the participant at www. nysmandatedreporter. org. New York State Office of Children Family Services Capital View Office Park, 52 Washington Street Rensselaer, New York 12144 Visit our website at: www. ocfs. state. ny. us To report child abuse and neglect call: 1-800-342-3720 For information on the Abandoned Infant Protection Act call: 1-866-505-SAFE (7233) Mandated Reporters Hotline for making child abuse and maltreatment reports: 1-800-635-1522 In the day care I am employed at our program policy regarding my responsibility’s to report child abuse and neglect, I am to tell my programs director or any other administrator in charge what I have seen or have noticed, so they can make a report to the SCR.

Deflation Japan And The Bank Of Japan Essay - 1606 Words

Deflation refers to a situation where there is a reduction in the general levels of prices of goods and services. It takes place when the rate of inflation falls below 0 percent in that case the inflation rate is negative. Inflation decreases the real value of money while deflation raises the real value of money and this enables a person to be able to purchase more goods and services with the same amount of money than before (Hutchison et al, 2006). Japan as a country has really suffered from a long-lasting but mild deflation which started in the mid 1990s. Both the government and the bank of Japan tried to get rid of it by decreasing the rates of interests and ‘quantitative easing’. However, they did not create a constant increase in the broad money and so the deflation persisted .this paper discusses the deflation worries in Japan and in the bank of Japan in terms of equity and financial markets (Mikuni et al, 2003). The Bank of Japan’s (BOJ) near doubling the p urchase of shares belonging to Tokyo is making the investors to have worries on the central bank that it will dominate the financial markets , which will cause price distortions as it goes on greasing the economy. The Bank of Japan’s purchasing spree will make it harder for the investors to sift those companies which are good and those which are bad, and comes up with a lot of other problems such as making trading of equities to be more speculative, misallocation of capital and decreasing incentives for theShow MoreRelatedCase Study1380 Words   |  6 Pagescase we get an entire scenario about how the Japan deflation set in, what were the effects of the deflation on the economy as well as on the people of Japan. It also mentions about the various reasons because of which Japan was in such a tight grip of Deflation, Depression, Demographics and Debts Guides us through the steps taken by the government in order to curb this deflation. 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The economic situation hasRead MoreCan China Avoid Japans Deflationary Fate?1892 Words   |  8 Pagesexport them by weakening the yuan. The decision by the Peoples’ Bank of China (PBoC) to allow the currency to weaken in August sent shock waves around global financial markets, because it highlighted the risks of further escalation in the Great Currency War. Furthermore, the decision to at least contemplate devaluation to solve deflationary issues was viewed as mimicking the policies of the European Central Bank ( ECB) and the Bank of Japan (BoJ). The latter is an old hand at fighting the persistence

Back to the Future Past, Present, and Future Free Essays

string(56) " and all the way to 2015; the past, present and future\." Jeff Harber Professor Barnaby Palmer GLA 618 OL1: Film Music History 6 December 2012 Back to the Future: Past, Present, and Future Whether you are a movie buff or just a dude from the 80’s, there is a good chance you have seen the classic movie â€Å"Back to the Future. † Accompanied by an iconic cast and crew, the movie garnered so much popularity, Universal Studios pumped out three installments of the Trilogy –†Back to the Future 1, 2, and 3. With Steven Spielberg’s and Robert Zemeckis’ stamp, Back to the Future not only launched Michael J. We will write a custom essay sample on Back to the Future: Past, Present, and Future or any similar topic only for you Order Now Fox’s career, but undoubtedly changed movies forever. There is much to discuss and analyze about all three installments. These would include actor choices, spotting, direction, acting, and most importantly the soundtrack and musical choices for all 3. Considering all 3 movie plots jump from decade to decade, it can be analyzed literally from past, present, and future. Inevitably, Back to the Future’s success also led to several video game launches, a ride at Universal Studios in Hollywood and Orlando, an animated series, and even a comic book. Let’s go back to the year 1985, you and your bodacious friends want to hang ten with the dudes, so you guys catch a flick at the local cineplex. Your choices are Mask, Teen Wolf, or Back to the Future. You mean the guy from Family Ties? So you take your chances on Back to the Future. Good choice! Of all things, Eric Stolz, the main actor in Mask, was originally cast for the role of Marty Mcfly when production of Back to the Future began on November 26,1984. Stoltz was filmed for four weeks, but after seeing a rough cut, Steven Spielberg and the writer/directors decided that Stoltz had played the role â€Å"too seriously† for a comedy, and he was replaced by Michael J. Fox (Futurepedia). Back To The Future was written by Bob Gale and Robert Zemeckis, and mainly starred Michael J. Fox and Christopher Lloyd. The movie opened on July 3, 1985 and grossed $210 million at the US box office, making it the highest grossing film of 1985 (IMDb). The basic synopsis of Back to the Future 1, is about a young man named Marty Mcfly who accidentally travels into the past and jeopardizes his own future existence. With the help of an eccentric local scientist named Dr. Emmett L. Brown, he manages to travel back in time via a time machine made from a DeLorean. This was done by breaking the time barrier in what was called temporal displacement allowing it to travel along the space-time continuum. When the first script was made, a refrigerator was the planned prop for the time machine. Later Steven Spielberg decided he didn’t want kids trapped inside their refrigerators trying to play time traveling games (Funtrivia). Done carefully, Bones Howe (music supervisor) and Alan Silvestri (composer) gathered an array of perfectly fit songs to cater both the 1950’s as well as the 1980’s. The movie jumps from decade to decade throughout the movie, and makes it apparent when it does. The movie starts out when Marty is late for school, he gets on his skateboard and we hear a fantastic song by Huey Lewis and the News, the â€Å"Power of Love. Later in the movie, we hear another solid track by Huey Lewis entitled â€Å"Back in Time. † By the way, Huey Lewis makes a cameo as a judge. When Marty tries out for the school competition, Huey says, â€Å"hold it. hold it†¦ I’m afraid you are just too darn loud. † This is also considered diagetic mus ic in the film. Marty’s first time travel sent him to the year 1955. Marty, immediately, arrives at the Twin Pines Ranch, which was owned by Otis Peabody. Marty crashes into the barn on Mr. Peabody’s property which causes the entire Peabody family to wake up and come outside. Marty encounters many differences between 1985 and 1955, including a cleaner, less run-down ambiance in the Courthouse Square. While searching for a younger Doc Brown, he meets his father and accidentally interferes with the first meeting of his parents–being hit by his grandfather’s Chevrolet in his father’s place. While in the 1950’s, some of the songs we hear are such great classics â€Å"Night Train† by Marvin Berry, â€Å"Earth Angel (Will You Be Mine)† by Marvin Berry, â€Å"Wallflower† by Etta James, and â€Å"Johnny B. Goode† by Chuck Berry aka Marty Mcfly. Some people complained that Back to the Future was a racist movie because Chuck Berry was inspired by a white guy. Sometimes a joke is just a joke; but Chuck Berry liked it. (Davis). Finally we have the sensational score by Alan Silvestri. At times the score is adventurous, and at times it’s sad. The spotting is done just right to balance the dynamics of the movie. Also, there is a leitmotif that accompanies the movie, in fact, it accompanies all 3 movies of the trilogy, and never goes unnoticed. Upon the success of the first film, Robert Zemeckis (director) and Bob Gale (writer) agreed to do a 2nd movie. In fact, they also intended on a 3rd movie, and both the 2nd and 3rd Back to the Future were filmed simultaneously and released six months apart. Back to the Future 2, with a budget of $40 million, grossed nearly $331 million at the box office (IMDb). The characters of George Mcfly and Jennifer Parker were played by different actors from those in the first film, requiring scenes that overlap to be re-shot. Jennifer Parker which was originally played by Claudia Wells, and replaced by Elisabeth Shue in the second film. Claudia claims she turned the roll down when she found out her mother was diagnosed with cancer (Futurepedia). George Mcfly, who was originally played by the quirky Crispin Glover, was later replaced by Jeffrey Weissman. Crispin Glover refused to return to the trilogy due to salary disputes. Back to the Future 2 pans back and forth from 1955, to 1985, and all the way to 2015; the past, present and future. You read "Back to the Future: Past, Present, and Future" in category "Essay examples" Needless to say, Bob Gale and Zemeckis attempted to predict what 2015 would like and sound like. Some songs used in the 2015 scenes, were â€Å"Beat it† by Michael Jackson, â€Å"I Can’t Drive 55† by Sammy Hagar, â€Å"Mr. Sandman† by The Four Aces, and â€Å"Papa Loves Mambo† by the Perry Como. The filmmakers did do some research into what scientists thought may occur in the year 2015. Bob Gale also commented; â€Å"We knew we weren’t going have flying cars by the year 2015, but God we had to have those in our movie. â€Å"(Q A) The film was also considered one of the most ground-breaking projects for Industrial Light Magic. It was one of the effects house’s first forays into digital compositing, as well as the VistaGlide motion control camera system, which enabled them to shoot one of the film’s most complex sequences, in which Michael J. Fox played three separate characters, all of whom interacted with each other. Although such scenes were not new, the VistaGlide allowed, for the first time, a completely dynamic scene in which camera movement could finally be incorporated. The technique was also used in scenes where Thomas F. Wilson’s character (Biff Tannen) had to interact with a younger version of himself. (Zemeckis) Six months after Back to the Future 2 was released in the theaters, the Back to the Future team released Back to the Future 3 on May 25, 1990. Again on a budget of $40 million, this one cashed in at $244 Million. The film takes place immediately after the events of Back to the Future Part II. While stranded in 1955, Marty McFly discovers that his friend Dr. Emmett â€Å"Doc† Brown was killed by Biff Tannen’s great-grandfather Buford. Marty decides to travel to 1885 to rescue Doc and return to his own timeline. This time, Alan Silvestri had to create his soundtrack based in the year 1885. However, he still maintained the leitmotif throughout the picture. The years 1985 and 1955 are still relevant in the 3rd movie, and it jumps around. The popular group ZZ Top make an appearance, as they perform â€Å"Doubleback† during a festival in 1885. This was also considered diagetic —-performed for the actors and the audience to hear. Huey Lewis’ â€Å"Power of Love† is also heard again. In 1989, a video game, based on the original Back to the Future movie was produced for the 8-bit Nintendo Entertainment System (NES) by video game publisher LJN a subsidiary of Acclaim games. This has some similarity to the 1983 Atari video game E. T. where producers felt it would sell solely on brand association to the hit movie and the game designers were only given five weeks in order to produce a product to get it on the shelves for the 1982 Christmas shopping rush. Reviewers also cited that game as virtually unlike the film and was a major contributor to an economic downturn known as the Great Video Game Crash of 1983. There are only two songs found in the entire game. One is â€Å"Johnny B. Goode† which will play during the school dance that Marty is playing on stage and sounds close to the version heard in the film. The other song is a repetitive looping song that will play throughout the game in non-mini game moments. There are suggestions that the song is supposed to be â€Å"The Power Of Love† by Huey Lewis ; The News sped up and cycled differently. But it winds up sounding nothing like the actual song made famous in the movie. Nes also later released Back to the Future 2 and 3 as a single game in 1990. Back to the Future II ; III received largely negative reviews from critics. Stan Stepanic of Gamefreaks365. om gave the game positive remarks in regards to similarities with The Goonies II, but gave it a largely negative review due to the lack of a password or save feature coupled with its notorious length, although there was a code to skip to the second half of the game. Back to the Future II ; III’s length has often been cited as the game’s major weakness, Stan stating that it took him roughly six hours just to map it, and he spent so much time trying to finish it he act ually turned it off out of boredom. (Gamefreaks). Sega Genesis also released their own version of Back to the Future 3 in 1991. It was a lot different than the Nintendo version. However, it was just as unpopular, the opening level was nearly impossible to complete. Finally in 2010, Telltale Games released Back to the Future on PC and Mac; and later was also released on the Ipad and Playstation 3. This was given way better reviews than the predecessors, and remains the best game of yet. Ben PerLee from GameZone summarized his praise of the game by saying it is a â€Å"feel good cinematic experience that any fan of Back to the Future will want to check out, and everyone else would do well to check it out. GameZone) Back to the Future: The Animated Series was an animated series based on the Back to the Future trilogy as well. The series lasted two seasons, each lasting 13 episodes, and ran on CBS from September 7, 1991 to November 28, 1992, the date of the last original episode. Harvey Comics also published a series of Back to the Future comic books starting in November 1991. With the cover header reading †Å"The Adventure Has Only Begun! ,† the first issue featured Doc Marty in 1927 Chicago. On May 2,1991 the Universal Studios Theme park in Florida released Back To The Future: The Ride. It was a simulator ride based on the popular movie trilogy of the same name. It was a mini-sequel to Back to the Future Part III. Later at Universal Studios Hollywood, they opened the same ride on June 12, 1993 ; and then at Universal Studios Japan on March 31, 2001. The Orlando and Hollywood versions closed in 2007 (Futurepedia). Although Back to the Future creators Robert Zemeckis and Bob Gale had no involvement with the ride, they were consulted as to whether they â€Å"got Doc right†. The two responded with a â€Å"yes†. They have also commented that â€Å"it’s a great ride. In addition, references are made to a â€Å"Zemeckis-Gale diagram† and â€Å"Gale-Zemeckis Coordinates (Giveneyestosee) With the huge success of the Back to the Future Trilogy, you can see where a simple idea can turn into a big one. When you take risks on a new actor, and stamp something with a touch of great directing, production, and a great score —- you never know what could happen. Back to the Future will always remain a classic no matter what generation it leads to; whether it be 1955,1985, or even 2015. Works Cited â€Å"Back to the Future II III Review. Review. Gamefreaks365, n. d. Web. 6 Dec. 2012. â€Å"Back to the Future Part II. † IMDb. IMDb. com, n. d. Web. 10 Dec. 2012. â€Å"Back to the Future: The Ride. † FuturePedia. Wikia, n. d. Web. 6 Dec. 2012. â€Å"Back to the Future: The Ride. † Giveneyestosee. N. p. , n. d. Web. 10 Dec. 2012. â€Å"BTTF Trilogy. † The â€Å"Back To The Future† Trilogy. Funtrivia, n. d. Web. 10 Dec. 2012. â€Å"Claudia Wells. † Futurepedia. Wikia, n. d. Web. 6 Dec. 2012. Davis, Cindy. â€Å"Pajiba. † Mindhole Blowers: 20 Facts About Back to the Future That Might Make Your Flux Capacitor Hit 1. 21 Gigawatts. N. p. , n. d. Web. 10 Dec. 2012. â€Å"Futurepedia. † Futurepedia. Wikia, n. d. Web. 6 Dec. 2012. IMDb. IMDb. com, n. d. Web. 10 Dec. 2012. PerLee, Ben. â€Å"Back to the Future: The Game Review. † Back to the Future – The Game Review. GameZone, 28 Dec. 2010. Web. 10 Dec. 2012. â€Å"QA Commentary with Robert Zemeckis and Bob Gale, Back to the Future Part II Blu-Ray, 2010. † Interview. DVD Blu Ray. N. d. Television. Robert Zemeckis, Bob Gale (2005). Back to the Future Feature: Making the Trilogy Part 2. Los Angeles: Universal Pictures. N. d. Television. How to cite Back to the Future: Past, Present, and Future, Essay examples

Forced Air Induction Essay Example For Students

Forced Air Induction Essay The Garret Aviation VNT-25 The idea of forced air induction by turbine, orturbo, is not new and has its mass production roots in WWII fighter planes. What is new, however, is its application to passenger automobiles. Unlike a nearconstant high RPM fighter engine, an automobile requires wide-open throttle (WOT)power availability throughout its entire operating range. Previous automotiveturbo applications acted like an on-off power switch with a five second delay,decreasing drivability, rather than providing the smooth linear powerband of anormally aspirated engine. Because the turbine is in a fixed position in theexhaust stream, it was plagued with sometimes uncontrolled production from thecompressor at high engine speeds, commonly referred to as boost creep, and asignificant decrease fuel economy versus a similar, but naturally aspiratedengine. The Garret Aviation produced VNT-25 solved all of these problems withits innovative Variable Nozzle Turbine. Hands down it is the most advanced turboever mass-produced and it was the first of its kind on production cars. One ofthe most talked about problems with turbo charged engines is the lengthy time ittakes for the turbo itself to accelerate to operational speeds. This is commonlyreferred to as turbo lag or turbo spool up time. Under WOT, turbo lag results ina seemingly underpowered engine that suddenly comes to life as a delayed tiremelting rush of acceleration. Previously, turbo lag was limited by decreasingthe size of the turbo itself. This resulted in lower rotating mass and moreimportantly, a smaller cross sectional area, which accelerated exhaust gasses atlower engine speeds. Although the turbo is able to spool quicker due to itssize, for the same reason its ability to move and compress large amounts of airefficiently is significantly reduced. Inherently a smaller turbo will produceless maximum horsepower than if it were replaced by larger turbo on the sameengine. Previous turbochargers also used a fixed position turbine that poweredthe centrifugal compressor directly. Because the turbine is located directly inthe exhaust stream, the turbine is a huge exhaus t restriction. This restrictioncreates a constant exhaust backpressure that decreases fuel economy even whenthe turbo is not in use. At high engine speeds, the restriction creates enoughpressure in front of the turbine (back pressure) that the wastegate can nolonger limit turbine power by bypassing the exhaust around the turbine. Theresult is that turbo compresses more air into the engine than is wanted. Forexample, a turbo was set to produce a maximum 12psi boost pressure, but during aperiod of sustained wide open throttle high engine speeds the turbo is nowproducing 14.5psi of boost and still rising. This unwanted phenomenon is calledboost creep. The VNT-25 solves all of these problems with an innovative turbinecalled a Variable Nozzle Turbine. Rather than a fixed turbine the VNT-25 uses aring of 12 moveable paddles aligned around a central, but very small turbinewheel. The entire exhaust charge is then directed to the small turbine by thepaddles. Moving the paddles varied the cro ssectional area that the exhaust mustpass through. When the paddles are nearly closed the exhaust is acceleratedtowards the turbine wheel to increase power. Decreasing the crossectional areaof flow accelerates normally slow, low engine speed, gasses and nearlyeliminates turbo lag while allowing a large and efficient compressor wheel forexcellent maximum engine power. Opening the paddles allowed the exhaust to flowslower and bypass the turbine to limit power. This unique arrangementsignificantly reduced backpressure, greatly improved fuel economy, and allowsexcellent control turbine power at sustained high engine speed, without the useof a bulky external wastegate. The Garret VNT isnt without its drawbacks. Inhigh performance applications it is a turbo that has little to be desired. Theengineers of this turbo, in their effort to reduce turbo lag as much aspossible, kept the compressor and turbine as small as possible. The smaller sizeof the turbine and the compressor decreases the si ze and therefore the weight ofthe turbo internals. Keeping the weight as light as possible reduces rotationalinertia to an absolute minimum, which results in a much more responsive turbo. .u94ad880034e0b7c3fd70f54b37de133d , .u94ad880034e0b7c3fd70f54b37de133d .postImageUrl , .u94ad880034e0b7c3fd70f54b37de133d .centered-text-area { min-height: 80px; position: relative; } .u94ad880034e0b7c3fd70f54b37de133d , .u94ad880034e0b7c3fd70f54b37de133d:hover , .u94ad880034e0b7c3fd70f54b37de133d:visited , .u94ad880034e0b7c3fd70f54b37de133d:active { border:0!important; } .u94ad880034e0b7c3fd70f54b37de133d .clearfix:after { content: ""; display: table; clear: both; } .u94ad880034e0b7c3fd70f54b37de133d { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u94ad880034e0b7c3fd70f54b37de133d:active , .u94ad880034e0b7c3fd70f54b37de133d:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u94ad880034e0b7c3fd70f54b37de133d .centered-text-area { width: 100%; position: relative ; } .u94ad880034e0b7c3fd70f54b37de133d .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u94ad880034e0b7c3fd70f54b37de133d .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u94ad880034e0b7c3fd70f54b37de133d .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u94ad880034e0b7c3fd70f54b37de133d:hover .ctaButton { background-color: #34495E!important; } .u94ad880034e0b7c3fd70f54b37de133d .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u94ad880034e0b7c3fd70f54b37de133d .u94ad880034e0b7c3fd70f54b37de133d-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u94ad880034e0b7c3fd70f54b37de133d:after { content: ""; display: block; clear: both; } READ: A Room Of One's Own Essay Because the exducer, that is the compressor, is of a compressor type,operational speeds are very high. It is not unlikely for a VNT to reach maximumoperational speeds of 173 thousand revolutions per minute even though resting orcruise speed of the turbine is only 2000-6000 RPMs. It is thislatency of the turbo to accelerate to operating speeds that is referred to asturbo lag. Although the small size of the turbine is ideal for a moderateperformance car, its size is a handicap in racing situations. Inherent with asmall compressor is its ability to quickly reach operating boost pressure. Thisdoes not come with out a penalty. Effectively this small compressor tradesefficiency for speed. As any gas is compressed the temperature of it rises. Smaller compressors will tend to heat the compressed air more than would alarger turbo for a given pressure. Bernoullis principal states that as a gas iscompressed the temperature increases as the volume decreases. The inefficiencyof the VNT at pressures over 15 pounds per square inch increases the temperatureof the gas more than it is possible for it to compress, or decrease the volume. The result is that the increase in boost pressure is inversely proportional tothe volume of air moved. As the compressor works to decrease the volume of air,the rise in temperature works to increase the volume. Eventually the volume ofair is expanded by heat more than it can be compressed. The point at which thishappens is referred to as the stall speed. Because a larger turbo, although slowto respond, is much more efficient at higher pressures it will result in a muchcooler charge at a given pressure. A smaller compressor also cannot move largequantities of air at high pressures as would a larger turbo be able to. The sizeof the VNT, although ideal for 12psi as it was intended for, suffers greatly inhigh performance applications from stall speed of psi. The turbine also suffersfrom a small and compact A/R ratio. The A/R is the ratio at which the turbine orcompressor housing is cast. The A/R is the ratio at which the volume of thehousing as gasses enter the housing to the volume it e xits. For instance, thesize of connection on the intake side of the compressor is two and one quarterinches inside diameter and has a volume of 323 cubic centimeters until itreaches the compressor. The exit side is also two and one quarter inches insidediameter and contains a volume of 155ccs. The volume of each path to thecompressor is misleading and cannot be determined from the diameter of the exitor intrance alone. The intake passage is a direct and simple path to thecompressor cartridge. The exit, however, is fluted from the from a very wide andnarrow, almost rectangular, passage at the side of the compressor to a standard2 inch inside diameter round pipe fitting. This fluted shape insures that thespeed of the compressed charge is kept relatively high. The high speed maintainsthat the compressed charge is kept away from the compressor. If it were allowedto back up near the compressor, the compressor would have to work much harder tomove the already dense air. The result would b e that the clready compressed airwould be further compressed and heated. Although the small inlet and outletsizes contribute to increased velocity With the introduction of the GarretVNT-25 it is now possible for a small displacement turbo charged engine tooperate and perform nearly identical to a much larger engine. The ON/OFF switchof turbo power is gone and is now replaced by the safer, smoother, and much morelinear acceleration comparable to naturally aspirated engines of much largerdisplacement. A VNT-25 equipped engine also has the potential to, and usuallydoes, produce much more power than engines twice its size. However, withdisciplined drivers, it does not loose the fuel economy characteristics inherentwith small, normally aspirated engines when the turbo is not in use. The VNT-25combines the responsiveness of a small turbo with the efficiency and performanceof a much larger turbocharger. Simply stated, the VNT-25 is the idealturbocharger. It allows great power almost no tur bo lag, great responsiveness,retains engine and compressor efficiency, and allows excellent turbine controlfrom boost creep. BibliographyRalph C. Bohn, Angus MacDonald. Energy Technology. Fourth Edition, Peoria,IL: Macmillan/McGraw Publishing, 1992. Chrysler Passenger Cars Factory ServiceManual vol.1; Engine and Chassis 1990. www.alliedsignal.com/business/turbo/about_cas.htmlhttp://idt.net/~vnt4/vntrpt.html http://idt.net/~vnt4Physics