Cambridge Engineering Selector CES Computer Science Essay

Cambridge Engineering Selector CES Computer Science Essay In this particular assignment we are going to find the best material for a part of land-based gas turbine. For this research we are going to use the Cambridge Engineering Selector (CFS) software. We are going to find the manufacturing process. We are going to make a report by the help of CES software on eco-audit for the existing material and the material we choose. We have some information and data given by the company on the existing material. The component shows below is the part of the land-based gas turbine. j230comb Fig. 1 The part of land-based gas turbine It is made from Hastelloy X material which is a Nickel-Chromium-Iron-Molybdenum alloy. It has excellent strength and oxidation resistance. Its approximate chemical composition is Ni 47%, Cr 22%, Fe 18%, Mo 9%, and Co 1.5%. It has a good ductility thats why it can be forged and can be cold-worked. So this material is good for welding. The component has 0.75 m in diameter, 10 mm in thickness and 200 mm of depth. The component is on service for 10 years and need to be replaced. The component need to be operates on some require condition i.e. temperatures up to 800oC, good thermal shock and corrosion resistance. It should be capable of being manufactured by casting. By using the CES software we have to specify the manufacturing process. And if require we have to do coating to achieve the heat and corrosion resistance. We have some more data given which is Minimum Tensile Strength 300MPa, Has to operate above 550oC, Maximum thermal expansion 15 ÃŽ ¼ strain/o C, Minimum Yield Strength 300MPa. Cambridge Engineering Selector (CES) It is a software package which help designer to make decision over which materials and design process to use in the development of new equipment. We can use the CES software for general analysis and optimization applications by material universe data module. By the help of CES software we can design or redesign components with highest performance and lowest cost. CES software consists of three levels. Level 1 for Introductory-level students, providing introduction to the world of materials and processes and helping them to select the materials and processes with limited datasets of 67 materials and 75 processes. Level 2 for Intermediate-level students, providing the structured methodology for more materials and processes in the depth investigations with 98 materials and 107 processes with more information. Level 3 for Advanced/graduate students, providing the full materials and processes used in industry with added design notes with the vast selection of materials. In this particular level there are 3000 materials and more than 200 processes. CES software consists of the following main windows. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesmain windows of ces.jpg Fig. 2 CES main window Browse This window contains a list of the tables in the database and the classification tree for the selected table. Select This window is the central navigation point for selection projects, showing the selection settings, the project stages and the selection results. Search This window is used for text searches on records in the database. Graph Stage This window displays selection charts which show the relationships between attributes. Limit Stage This window is used to enter selection criteria as limits on individual attributes. Datasheet This window displays a list of attributes for individual records. There can be many of these on the screen at a time. As the requirement of the assignment, the company ask for the more efficient and economical material for the land-based gas turbine part. The part should be fulfilling the required properties and condition. For the particular material for the part of the land-based gas turbine, level three is reliable containing more than 3300 materials. In level three, by selection the select windows it will show the selection data. In selection data pane there is an option to select materials universe: all bulk materials. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesselestion atage all bulk materials.jpg Fig. 3 selection data pane (All bulk Materials) The selection Results contains a list of all of the records that have passed the selection stages. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ces2945 materials.jpg Fig. 4 All bulk Materials Selection stage of CES 1. Selection with the TREE stage To create a new tree stage selects new tree stage from the select menu or the click the tree button. The tree stage properties will appear. For the project, the material for the part of land-based gas turbine should be metals and alloys, so insert it. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesfirst tree for metals and alloys.jpg Fig. 5 Tree stage (Metals and Alloys) In the Tree Stage window, for a single relationship, click the Show button. This opens the Cell Contents dialog, listing the names of records that fulfil the link selection criterion for the row. In the Cell Contents dialog, Click on a column heading to sort the list by record name C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ces1607 materials.jpg Fig. 6 All Metals and Alloys By applying the condition of metals and alloys in this tree stage, it will show only the metals and alloys from all universe materials. 2. Selection by limit stage To create a limit stage, select new limit stage from select menu or click the limit button in the selection stages pane of the select window. A limit stage window will appear, and the stage will be listed in the selection stages pane. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesfirst limit.jpg Fig. 7 Limit selection stage Before we going to apply all the limits, lets check the requirements of the company. The company wants the part should be operate up to 800oC, so the maximum service temperature should be 800oC and it also require that it should be operate above 550oC so the minimum service temperature should be 550oC. The tensile strength and yield strength should be minimum 300 MPa. The Maximum thermal expansion should be not more than 15 ÃŽ ¼strain/ oC. However, the tensile strength and yield strength are mechanical properties and service temperature and thermal expansion are thermal properties of the material. Tensile strength: maximum load that a material can support without fracture when being stretched, divided by the original cross-sectional area of the material. Yield strength: The stress at the yield point. And the stress needed to produce a specified amount of plastic deformation. Thermal expansion: Increase in volume of a material as its temperature is increased, usually expressed as a fractional change in dimensions per unit temperature change. When the material is a solid, thermal expansion is usually described in terms of change in length, height, or thickness. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesapply limit mechanical properties.jpg Fig. 8 Applying Yield strength and Tensile strength C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesthermal limits.jpg Fig. 9 Applying service Temperature By applying the mechanical and thermal properties of material, it will show 171 materials which fulfil the conditions. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ces171 materials.jpg Fig. 10 Metals and Alloys after applying mechanical and thermal properties Manufacturing process It is important to make the right manufacturing decisions early in the design process, before the cost-penalty of making changes becomes too high. The selection of the most appropriate manufacturing process of which there are a very large number is one such decision. Taking a broad view, a process is a method for shaping or finishing or joining a material (Esawi, 1997). The kingdom of processes contains broad families: casting, deformation, moulding, machining, compaction of powders, and such like. Each family contains many classes: casting contains sand-casting, die-casting, and investment casting, for instance. These in turn have many members: there are many variants of sand-casting, some specialized to give greater precision, others modified to allow exceptional size, and still others adapted to deal with specific materials. The land-based gas turbine should be capable of being manufactured by casting. By applying another tree stage for the manufacturing process in trees pane click on process universe and in shaping process, select the casting and insert it. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cestree manufacturing process.jpg Fig. 11 Tree stage for manufacturing process After applying the casting limit to the materials selected, its eliminated all the materials which can be shaped by casting. There are only 67 materials left. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ces67 materials after casting.jpg Fig. 12 Materials which can be shaped by casting As the company requirement the material should be half or less price than the original material. It is made of Hastelloy X material which is one the alloy of Ni-Cr alloy group. The Hastelloy X materials cost is 15.7- 17.3 GBP/kg. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ceshastelloy x.jpg Fig. 13 Hastelloy X materials details By applying the graph for the price for the selected materials. The existing material price is 15.7- 17.3 GBP/kg and the requirement is the half and less than the existing price. By the help of the selection box its easy to eliminate the expensive materials from the graph. Selecting the materials from less than 9 GBP/kg by the help of selection box. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of cesprice graph.jpg Fig. 14 The bar chart of selected material with price After applying the condition of price, there are only 11 materials left. C:UsersRANJANDesktopFINAL ASSIGNMENTHigh Temperature Materials and Applicationsphoto of ces11 materials.jpg Fig. 15 Materials selected after the condition of price Esawi, A. M. K. and Ashby M. F., Computer-Based Selection of Manufacturing Processes, Cambridge University Engineering Dept Report, CUED/C-EDC/TR50, May 1997.

Censorship in Libraries and Schools Essay -- Censoring Literature Essa

Censorship in Libraries and Schools What would you do if you went to your child's school and saw that they were looking at inappropriate material on the internet? Would you react the same way if they were in a public library? Who decides what is okay for your children to view? Who decides where they can view it? What can you do about them being able to view these things? Are there any laws that can prevent this from happening? What are some schools and libraries doing to help prevent children form looking at such material? These are all issues that will be discussed in the next few paragraphs, along with my opinions on the matter. Body In 1998 there was a law passed, called the Child Online Protection Act, which "made it a federal crime for commercial Web sites to make available to minors materials that are harmful to minors, as judged by community standards". The sites that were considered harmful to minors had to get proof of age from the visitor of the site. This law, like the rest, caused uproar with the First Amendment supporters. The supporters "argued that the law was too broad and would threaten are, news, and health sites". The federal court agreed with the supporters and declared that this law was unconstitutional, because the "Web is accessible everywhere, the community-standards would restrict the entire country to the standards of the most conservative community". This ruling was made in 2000, in 2001 the Supreme Court heard an appeal from the government, but has not yet ruled. In my opinion, I think that this would be a good idea. Yeah, it would take away some of the people's privacy, but that is a sm all price to pay to keep the children in our nation from seeing things that can be harmful to them. I know... ...lusion As a parent you really cannot do anything about what your child views while at the library or while at school. You could tell them that they are not allowed to look at those sites, but sometimes those sites just pop up, or we all know that when we tell a child that they cannot so something it makes them want to do it even more. You can keep them from viewing certain things at home but other than that there is not much that you can do. Sorry, but it is true. There are people out there that are trying to change this, and we see this by the laws that are continuing to be made and changing. As I said earlier filters cannot be perfect, there will always be problems with them, but we just have to deal with them the way that they are. That is just life. Works Cited: Baase, Sara (2003). A Gift of Fire (2nd ed.). Upper Saddle River: Pearson Education, Inc.

Crim Justice

Multiple Choice: Chose the most appropriate answer to the following questions: 1. Which of the following had a profound effect on individual rights by the 1980s? a. The Civil Rights movement. b. The Vietnam War. c. Terrorism. d. The increased use of drugs. 2. Which model below best assumes that the system’s components work together harmoniously to achieve justice. a. Due Process Model b. Conflict Model c. Individual Rights Model d. Consensus Model 3. Which step in the pretrial activities does a judicial officer determine if a crime has been committed? . Indictment b. Information c. Preliminary Hearing d. Information 4. According to the author Race and Ethnicity are buzz words that people use when discussing: a. Religion b. Fourth Amendment c. Multiculturalism d. Terrorism 5. Which of the following describes the scientific study of the causes and prevention of crime and the rehabilitation and punishment of offenders? a. Incarceration b. Criminology c. Indictment d. multicultura lism 6. Which Amendment to the U. S. Constitution is concerned with the defendant’s right to a jury trial? a. Fourth b. Fifth c. Sixth d. Eighth 7.A(n)________ is defined as criminal proceedings, the examination in court of the issues of fact and relevant law in a case for the purpose of convicting or acquitting the defendant. a. Trial b. Indictment c. Arraignment d. Probable Cause 8. Which of the following refers to crime fighting strategies that have been scientifically tested and are based on social science research? a. Crime Control Model b. Evidence Based Practice c. Social Control Model d. Criminology 9. Which stage in the criminal justice process involves taking pictures and fingerprints of a suspect? a. Arraignment b.Indictment c. Preliminary Hearing d. Booking 10. The first step in the Criminal Justice process begins with the: a. Arrest b. Investigation c. Booking d. Warrant 11. The preliminary hearing is used to decide whether: a. there are reasonable grounds to bel ieve the defendant committed the crime. b. the crime that occurred is a felony. c. the defendant is fit to stand trial. d. the defendant is guilty beyond a reasonable doubt. 12. An ideal that embraces all aspects of civilized life and that is linked to fundamental notions of fairness and to cultural beliefs about right and wrong is known as: . Equal rights b. Social Justice c. Multiculturalism d. Civil Justice 13. Who returns an indictment? a. the prosecutor b. the judge c. the arresting police officer d. the grand jury 14. Multiculturalism is often used in conjunction with what other term? a. traditionalist b. diversity c. homogeneous d. ethnocentric 15. A criminal justice perspective model that emphasizes the efficient arrest and conviction of criminal offenders is known as: a. Social Control Model b. Due Process Model c. Crime Control Model d. Omnibus Bill Model Chapter 1- True-FalseCircle the most appropriate answer to the following questions. 1. The Conflict Model assumes that the criminal justice system’s components function primarily to serve their own interests a. True b. False 2. The Corrections stage begins once a defendant has been convicted, but before sentencing. a. True b. False 3. Due Process is a right guaranteed only found in the Fifth Amendment to the U. S. Constitution. a. True b. False 4. The Crime-controlled model is defined as a criminal justice perspective that emphasizes the efficient arrest and conviction of criminal offenders. a. True . False 5. Gideon v. Wainwright is a landmark U. S. Supreme Court case ensuring the defendant’s right to a jury trial. a. True b. False Chapter 1 – Fill in the Blank Fill in the blank with the word or phrase that best completes or answers the question. 1. Not guilty, guilty, and no contest are all acceptable pleas at the______________. 2. The _________ model of criminal justice assumes that the system’s components function primarily serve their own interests. 3. The __________ model of criminal justice assumes that each of the component parts strive towards a common goal. 4. __________ based practice is crime fighting strategies that have been scientifically tested and are based on social science research. 5. ___________ occurs when there is conduct in violation of the criminal laws of a state, the federal government, or a local jurisdiction for which there is no legally acceptable justification or excuse. Chapter 1 – Matching Match the term in the numbered column with the answer in the lettered column. 1. Preliminary Hearing| a. A formal written accusation submitted to the court by a grand jury alleging that a specified person has committed a specified offense, usually a felony. 2. Indictment| b. A formal written accusation submitted to a court by a prosecutor alleging that a specified person has committed a specified offense. | 3. Probable Cause| c. A proceeding before a judicial officer in which it must be shown that: a crime was committed, the crime occurred within the jurisdiction of the court, and there are reasonable grounds to believe that the defendant did the crime. | 4. Information| d. A set of facts and circumstances that would induce a reasonably intelligent and prudent person to believe that a specified person has committed a specified crime. Chapter 1 Essay Provide detailed and comprehensive information to support your answer. Where applicable use examples to support your answers. 1. What is meant by due process of law? 2. Define multiculturalism, and highlight the importance of multiculturalism to the criminal justice process. 3. Compare and contrast the three main components of the criminal justice system. 4. Discuss the crime fighting strategies that have been scientifically tested and are based on social science research. 5.Define and discuss the term Administration of Justice. Chapter 1 – Critical Thinking Answer each part of the following questions with succinct and comprehensive information by ci ting examples of various models, laws, and justice theories in your answer. 1. Do you see a trend in our society in favor of individual rights or public interests? Cite recent examples to support your position. 2. What does justice mean to you? Discuss the three types of justice and their effect on individual rights to support your answer.

Good versus Evil in William Golding’s Lord of the Flies...

In William Golding’s Lord of the Flies, a young group of boys crash on an uncharted island. In the beginning the boys are excited to be alone, unsupervised by adults. But as the novel progresses, the boys begin to show their true nature. Through the boys, Golding attempts to expose the true nature of humankind, the good, the evil, and the in between. Simon represents the rare, truly good people in the world, the ones that do not do what they do to look good in another’s eyes, or because that is what is expected of them. Simon was alone on the island, one such time Golding says, â€Å"He looked over his shoulder . . . and glanced swiftly around to confirm that he was utterly alone† (56). In this instance, he is literally alone, but he is the†¦show more content†¦In the beginning, when order still reigns on the island, Jack seems to be the good English schoolboy. Although upset that he is not elected as chief on the island, he and Ralph soon become friend s, while he and the other choir boys are given responsibility to keep the fire going and hunt, and doing this keeps Jack pleased, for a while. However, as time progresses and Jack becomes more and more obsessed with hunting, his savage nature begins to show through the civilized side. His chants of, â€Å"Kill the pig! Cut his throat! Kill the pig! Bash him in!† represent his, and many of the other boys, desire, almost need to kill (Golding 114). Soon, Jack completely turns his back Ralph; running off with many other boys to the other, more savage, side of the island. Here, the boys hunt constantly, covered with war paint and carry spears, a bona fide savage. The lure of meat and fun soon bring the rest of the boy to Jack’s side of the island, it is here where the boys, including Ralph, participate in the murder of Simon. As the time progresses and Jack becomes more and more savage, his more violent nature comes out. Before the boys are rescued, Jack has already commit ted two murders, Simon and Piggy, and attempts to kill Ralph. Ralph is like neither of the others. Ralph represents the civilized side of human nature. Soon after the boys arrival on the island Ralph is elected as chief of the boys. Ralph believes that instead of playing on the island the firstShow MoreRelatedWilliam Golding s Lord Of The Flies1745 Words   |  7 Pages1954 novel, Lord of the Flies by Nobel Prize-winner William Golding is a dystopian allegory indicative of vast aspects of the human condition. Set in the midst of a nuclear war, the text details a group of marooned British school boys as they regress to a primitive state. Free from the rules and structures of civilisation and society, the boys split into factions - some attempting to maintain order and achieve common goals; others seeking anarchy and violence. The novel is based on Golding’s experienceRead MoreThe Lord of the Flies by William Golding1306 Words   |  5 PagesIn The Lord of the Flies, William Golding creates a microcosm that appears to be a utopia after he discharged from the British Royal Navy following World War II. After an emergency landing, Golding places a diverse group of boys on the island that soon turns out to be anything but utopia. The island the boys are on turns out to be an allegorical dystopia with inadequate conditions (Bryfonski 22). The boys reject all lessons they learned from their prior British society, and they turn towards theirRead MoreWilliam Golding s Lord Of The Flies1389 Words   |  6 PagesA response to Lord Of The Flies Imagine an airplane crash. The heat of flames scorch passengers’ backs in addition to the wind burning their faces. Lucky, this crash was over water and near an island so most passengers survive, with an exception of the airplane staff and the pilot. Even though alive, many are in fits of fear and panic, and others are in shock. After hurried deliberation, a lone member of the group is elected leader in hopes that they will calm the panic, and make the hard, but necessaryRead MoreGood Versus Evil in Lord of the Flies by William Golding Essay1235 Words   |  5 PagesGood vs. Evil Many years ago, Charles Darwin introduced a theory that we humans are a species which evolved from animals that have inhabited the Earth for many years, and he believed that we were civilized, intelligent, and logical life forms for these very reasons. In the novel, Lord of the Flies by William Golding there is a prominent theme of good versus evil which reveals that maybe humans are not the civilized human beings that they were said to be. William Golding carefully netted this themeRead MoreLord Of The Flies By William Golding1540 Words   |  7 Pagesviews of the concept of â€Å"good versus evil†. 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Conclusion – end of the novel William Golding exploresRead MoreHow Does Golding Present the Theme of Good Versus Evil in the Novel Lord of the Flies?3069 Words   |  13 PagesHow does Golding present the theme of good versus evil in the novel Lord of the Flies? William Goldings novel Lord of the Flies is at first impression a dramatic adventure story about a group of boys stranded on an island, whilst being evacuated from a war-torn world. However to the perceptive reader a more meaningful level of Goldings Lord of the Flies emerges. The novel is designed as an allegory; to a get a warning across to mankind about what Golding called the Essential sicknessRead MoreCivility Vs. Savagery In William Goldings Lord Of The Flies1397 Words   |  6 PagesIn the novel â€Å"Lord of the Flies† written by William Golding the novels main theme was civility versus savagery. The novel is about school boys who get stranded in an island because the airplane the boys were in was shot down. 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William Golding’s Lord of the Flies serves as a perfect fictional example of such questioning. Set on an island during World War II, a group of British schoolchildren become stranded on an island and therefore manage to â€Å"escape† the savage war-time conditions at home. However, it quickly becomes evident that savagery abounds on the island as well. Famous and somewhat nihilistic thinker Friedrich Nietzsche would have had insightful analysis regarding the interactions in Golding’s Lord of the