The Yellow Wallpaper, By Charlotte Perkins Gilman - 854 Words

Lost to the yellow Charlotte Perkins Gilman’s â€Å"The Yellow Wallpaper†, is about the internal struggle and confinement of a nameless woman. This woman confesses she is indeed not well and that her husband, John, who is a physician, diagnoses her with nervous depression. The treatment of said nervousness is where the story’s conflict arises. John decides his wife needs solitude in order to recover. He believes this solace will be found in an estate he rented. The narrator’s ultimate insanity is prompted by the isolation, denial, and self-judgment that she is forced into by her husband. John makes the decision to rent an isolated house for a few months to give his wife space to recover. The woman is aware that this isolation and continual rest will not to do her any good. Despite her lack of faith in John’s recovery plan, she submits to his firm advice and stays within the house. Instead of allowing outside stimulus to help with her condition, she begins to obsess with the objects in her room, especially the horrid yellow wallpaper. She journals, â€Å"When you follow the lame uncertain curves [of the wallpaper] for a little distance they suddenly commit suicide - plunge off at outrageous angles, destroy themselves in unheard of contradictions† (Gilman 309). This statement foreshadows her impending insanity and the destructiveness of isolation. Not only is she isolated physically, but also mentally and verbally. Paula A. Treichler, from University of Illinois, claims, â€Å"Because sheShow MoreRelatedThe Yellow Wallpaper By Charlotte Perkins Gilman885 Words   |  4 Pagesbeen a stigma around mental illness and feminism. â€Å"The Yellow Wallpaper† was written by Charlotte Perkins Gilman in the 1900’s. â€Å"The Yellow Wallpaper† has many hidden truths within the story. The story was an embellished version her own struggle with what was most likely post-partum depression. As the story progresses, one can see that she is not receiving proper treatment for her depression and thus it is getting worse. Gilman uses the wallpaper and what she sees in it to symbolize her desire to escapeRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman846 Words   |  4 PagesHumans are flawed individuals. Although flaws can be bad, people learn and grow from the mistakes made. Charlotte Perkins Gilman’s short story, â€Å"The Yellow Wallpaper†, gives one a true look at using flaws to help one grow. Gilman gives her reader’s a glimpse into what her life would have consisted of for a period of time in her life. Women were of little importance other than to clean the house and to reproduce. This story intertwines the reality of what the lives of woman who were considered toRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman1362 Words   |  6 Pagesas freaks. In the short story â€Å"The Yellow Wallpaper† by Charlotte Perkins Gilman, both of these elements are present. Gilman did a wonderful job portraying how women are not taken seriously and how lightly mental illnesses are taken. Gilman had, too, had firsthand experience with the physician in the story. Charlotte Perkins Gilman s believes that there really was no difference in means of way of thinking between men or women is strongly. â€Å"The Yellow Wallpaper† is a short story about a woman whoRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman1547 Words   |  7 PagesCharlotte Perkins Gilman s career as a leading feminists and social activist translated into her writing as did her personal life. Gilman s treatment for her severe depression and feelings of confinement in her marriage were paralleled by the narrator in her shorty story, The Yellow Wallpaper. Charlotte Perkins Gilman was born in 1860 in Hartford, Connecticut. Her parents, Mary Fitch Perkins and Fredrick Beecher Perkins, divorced in 1869. Her dad, a distinguished librarian and magazine editorRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman999 Words   |  4 Pages â€Å"The Yellow Wallpaper† is a story of a woman s psychological breakdown, which is shown through an imaginative conversation with the wallpaper. The relationship between the female narrator and the wallpaper reveals the inner condition of the narrator and also symbolically shows how women are oppressed in society. The story, read through a feminist lens, reflects a woman s struggle against the patriarchal power structure. In the â€Å"The Yellow Wallpaper†, Charlotte Perkins Gilman uses the wallpaperRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman904 Words   |  4 Pagescom/us/definiton/americaneglish/rest-cure?q=rest+cure). Charlotte Perkins Gilman wrote The Yellow Wallpaper as a reflection of series of events that happened in her own life. Women who fought the urge to be the typical stereotype were seen as having mental instabilities and were considered disobedient. The societal need for women to conform to the standards in the 1800s were very high. They were to cook, clean and teach their daughters how to take care of the men. Gilman grew up without her father and she vowedRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman2032 Words   |  9 Pagesâ€Å"The Yellow Wallpaper† by Charlotte Perkins Gilman is a poem about women facing unequal marriages, and women not being able to express themselves the way they want too. Charlotte Perkins Gilman was born in 1860, and died in 1935. This poem was written in 1892. When writing this poem, women really had no rights, they were like men’s property. So writing â€Å"The Yellow Wallpaper† during this time era, was quite shocking and altered society at the time. (Charlotte Perkins Gilman and the Feminization ofRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman Essay1208 Words   |  5 Pagesthat wallpaper as I did?† the woman behind the pattern was an image of herself. She has been the one â€Å"stooping and creeping.† The Yellow Wallpaper was written by Charlotte Perkins Gilman. In the story, three characters are intr oduced, Jane (the narrator), John, and Jennie. The Yellow Wallpaper is an ironic story that takes us inside the mind and emotions of a woman suffering a slow mental breakdown. The narrator begins to think that another woman is creeping around the room behind the wallpaper, attemptingRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman846 Words   |  4 PagesThe dignified journey of the admirable story â€Å"The Yellow Wallpaper† created by Charlotte Perkins Gilman’s, gave the thought whether or not the outcome was influenced by female oppression and feminism. Female oppression and feminist encouraged a series of women to have the freedom to oppose for their equal rights. Signified events in the story â€Å"The Yellow Wallpaper† resulted of inequality justice for women. Charlotte Perkins Gilman gave the reader different literary analysis to join the unjustifiableRead MoreThe Yellow Wallpaper By Charlotte Perkins Gilman1704 Words   |  7 PagesEscaping Th e Yellow Wallpaper Charlotte Perkins Gilman (1860-1935) whom is most acclaimed for her short story The Yellow Wallpaper (1891) was a women’s author that was relatively revolutionary. Gilman makes an appalling picture of captivity and confinement in the short story, outlining a semi-personal photo of a young lady experiencing the rest cure treatment by her spouse, whom in addition to being her husband was also her therapist. Gilman misused the rest cure in The Yellow Wallpaper to alarm other

Hospital Management System Free Essays

KOFORIDUA POLYTECHNIC PATIENT MONITORING SYSTEM (A CASE STUDY AT POLYTECHNIC CLINIC, KOFORIDUA) FOR HND COMPUTER NETWORK MANAGEMENT STUDENT’S NAME: WESONO FELIX 04/2010/582D DITSA, JONAS CUDJOE 04/2010/561D DATE: 6TH MARCH, 2013 COMPUTER SCIENCE DEPARTMENT AWARD †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. TENTATIVE TITLE (OR FINAL TITLE): †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ APPROVED BY HEAD OF DEPARTMENT COMPUTER SCIENCE Signature Date: †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢ € ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. We will write a custom essay sample on Hospital Management System or any similar topic only for you Order Now APPROVED BY DEAN, SCHOOL OF APPLIED SCIENCE AND TECHNOLOGY Signature Date: †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Chapter 1 1. 1. INTRODUCTION TO PROJECT Hospital administrators are often overwhelmed with information about a bulky number of patients and their stays to the hospital that need to be organized and kept up-to-date. The patient management system is a web based application that is designed and developed for hospital administrators and doctors to organize information on patient visits. The system intends to facilitate several steps in the process from the patient registration and to the patient evaluation. During this process, there will be many tasks that have to be handled by this system including maintaining complete information. The main objective of the system is to provide the administration staff and doctors with an easily maintainable information system for patient registration, visit scheduling and patient tracking with latest information. 1. 2. OBJECTIVES The main objectives for establishing this project is to solve the problem notified in the research. The objectives are outlined as follows: I. To improve patient’s registration II. To increase level of patient management III. To improve on patient records keeping IV. To assign doctors to patients V. Doctor Management VI. Bed/Room Management VII. Doctors can update the patient’s record with their observations 1. 3. PURPOSE OF THE PROJECT In a given day, number of patients visits a hospital or a clinic. Many hospitals in Ghana still manage the patient data manually. Hospitals will be able to save money and time if they have a good software program for managing patient’s data. The idea is to develop web based patient management software that can be used to keep track of the patients registering in a hospital or clinic. Doctors and the rooms available in a hospital can be managed using this system. Also, this system should support accessing the previous visit histories of any patient, search for patients by name etc. A few points to be noted about the system we are developing here * A patient can be categorized as â€Å" In patient† or â€Å"Out Patient†. If patient type is â€Å"In Patient†, a bed will be assigned to the patient. * A doctor will be assigned to each patient before the patient meets the doctor. Only one doctor can be assigned to a patient at a given time. * A patient can visit the hospital any number of times The project has been planned to be having the view of distributed architecture, with centralized storage of the database. The application for the storage of the data has been planned. Using the constructs of MS-SQL Server and all the user interfaces have been designed using the ASP. Net technologies. The database connectivity is planned using the â€Å"SQL Connection† methodology. The standards of security and data protective mechanism have been given a big choice for proper usage. The application takes care of different modules and their associated reports, which are produced as per the applicable strategies and standards that are put forwarded by the administrative staff. The entire project has been developed keeping in view of the distributed client server computing technology, in mind. The specification has been normalized up to 3NF to eliminate all the anomalies that may arise due to the database transaction that are executed by the general users and the organizational administration. The user interfaces are browser specific to give distributed accessibility for the overall system. The internal database has been selected as MS-SQL server 200. The basic constructs of table spaces, clusters and indexes have been exploited to provide higher consistency and reliability for the data storage. The MS-SQL server 200 was a choice as it provides the constructs of high-level reliability and security. The total front end was dominated using the ASP. Net technologies. At all proper levels high care was taken to check that the system manages the data consistency with proper business rules or validations. The database connectivity was planned using the latest â€Å"SQL Connection† technology provided by Microsoft Corporation. The authentication and authorization was crosschecked at all the relevant stages. The user level accessibility has been restricted into two zones namely. . 4. PROBLEM IN EXISTING SYSTEM * Cannot Upload and Download the latest updates. * No use of Web Services and Remoting. * Risk of mismanagement of data when the project is under development. * Less Security. * No proper coordination between different Applications and Users. * Fewer Users – Friendly. 1. 5. SOLUTION OF THESE PROBLEMS The development of the new system contains the following activi ties, which try to automate the entire process keeping in view of the database integration approach. 1. User friendliness is provided in the application with various controls. 2. The system makes the overall project management much easier and flexible. 3. Readily upload the latest updates, allows user to download the alerts by clicking the URL. 4. There is no risk of data mismanagement at any level while the project development is under process. 5. It provides high level of security with different level of authentication. 1. 6. REVIEW OF LITERATURE This chapter is on the related literature of the study and tries to place the study into its theoretical framework. It explores fields of related theories of the study which will serve as the basis for monitoring patients and their records. There is a lot of similar software in the market, example hospital management system which also function the same but it is very complex to use (non-user friendly) and requires a degree of training and expertise before one can use it. With the PATIENT MONITORING SYSTEM, everything is flexible and more user friendly with a high level of security with different level of authentication. 1. 8. BUDGET The budget of the research study will be: ACTIVITY| DURATION| INPUTS/ITEMS REQUIRED| COSTGH| Research| One (1) week| A – 4 paper (3 Rims), laptop| 20. 0| Interviews| One (1)week| | 10. 00| Interface Designer| Five (5 )Days | A- 4 sheets| 10. 00| Data Analysis| One (1)week| | 15. 00| Coding| Two (2) weeks| | 10. 00| Printing Photocopying| One (1) weeks| A- 4 sheets| 30. 00| Binding | Three (3)Days| | 15. 00| Preparation of final Study Report| Three (3) weeks| | 50. 00| | | SUB TOTAL| 160. 00| | | | | | | TOTAL| 170. 00| | | | | 1. 9. TIMELINE This project is going to be undertaken in two months two weeks to finish the project (PATIENT MONITORING SYSTEM). How to cite Hospital Management System, Essay examples

International Business for Transnational - myassignmenthelp.com

Question: Discuss about theInternational Business for Transnational Corporations. Answer: International business can help the sub-Saharan African countries in having positive growth of their economy along with reducing the rate of poverty. This is due to the fact that these African regions are resource rich with having abundance of natural resources. Thus, attracting the global organizations in tapping these resources will not be difficult. Thus, with the initiation of the utilization of these resources, the export will get increased, which in turn enhance the foreign reserves with these countries. These foreign reserves can be used in create favorable infrastructure for the business organizations to operate in these countries. Hence, with having rich natural resources and favorable infrastructure for business, more global organization will come in these countries (Taylor Thrift, 2013). It will help to increase the gross domestic production of these countries. With having inflow of business organizations, the rate of employment will get increase and thus the economy of t hese countries will also get increased. Moreover, with the increase in the rate of export, governments will have more funds to spend on the social welfare, which will also enhance the national economy. International business will also help to initiate rapid industrialization in these countries. With having more people get employed and increasing the purchasing power, the market potential will also get increased, which will in turn further attract more global organizations to start their operational facilities in these countries (Jenkins, 2013). Domestic industries will also thrive with having the inflow of international technologies and capital. Thus, this holistic approach of international business will help to enhance the economy of these countries along with enhancing the social welfare. On the other hand, international business will also help to optimally utilize the natural resources in these countries. With the empowerment of the common people due to international business, the poverty will also get reduced. Reference Jenkins, R. (2013). Transnational Corporations and Uneven Development (RLE International Business): The Internationalization of Capital and the Third World. Taylor, M., Thrift, N. (2013). Multinationals and the Restructuring of the World Economy (RLE International Business): The Geography of the Multinationals (Vol. 2).

Elasticity free essay sample

Elasticity of demand is the measure of consumer response to a change whether an increase or decrease in price. There are three categories that the response of the consumer can be grouped into: elastic, inelastic and unit elasticity. The calculation is relatively simple and the answer or the coefficient will be compared to the number 1. This number will always be positive and if our calculation gives us a negative number we take the absolute value. We divide the percent of change in demand by the percent change in price. For example if the price of milk went up 10 % and the change in demand went down by 1% we would divide . 10 by . 01. This would give us an answer of . 1. Given that . 1 is less than 1 we know that the good, in this case milk, would be inelastic. This means that over the short run price does not have a high impact on demand. If we were to look at a different good or service we may see different results. We will write a custom essay sample on Elasticity or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page For example if the price of movie tickets increased by 10% and the demand decreased by 20% we would apply the same calculation. We would need to divide . 20 by . 1 which would give us a coefficient of 2. 2 is greater than 1 so we can say that this good falls into the category of being elastic. Although rare the third category that a good or service can fall into is called unit elasticity. Unit elasticity is when the percent change in price is equal to the percent change in demand. For example if the cost of books increased by 10 percent and the demand decreased by 10 percent then when we divided . 1 by. 1 we would get an answer of 1. When this happens we know that this item has unit elasticity. B. Cross price elasticity helps us determine the relationship between two different products. We calculate this by dividing the percent change in demand for product Y by the percent change of price in product X. This calculation will help us identify whether the products are substitute or complementary goods. Unlike our calculation for Elasticity of demand we compare our answer here to the number zero. We use both positive and negative numbers. If we were to compare movie tickets which had a 5 percent increase in price to popcorn which had a 10 % decrease in demand we would calculate this by dividing . 05 by -. 1 we get an answer of -2. This of course is less than zero so we know that these two products are categorized as complementary. C. Income elasticity is the measure of demand changes in comparison with the change in personal income. This will help us categorize products into two categories inferior and superior goods. This is also measure up against zero and allows for both positive and negative values. The calculation is done by dividing the percent change in demand of a specific product by the percent change in income. As an example if we were to see how consumers respond to a 10 percent increase in relation to demand for high definition televisions. If we were to suppose demand increased by 5 per cent we would calculate this by dividing . 05 by. 1 which would result in an answer of . 5. We know this item would be considered a normal or superior good since our answer is a positive number. If we were to look at the demand of DVD players in relation to a 10 percent increase in personal income and we have a 25 percent decrease in demand we would divide -. 25 by . 1 which would result in an answer of -2. 5. Since this number is less than zero we would categorize this product as an inferior good. D. Lets refer back to our earlier example using red and green grapes. When we performed our calculation we discovered â€Å"Availability of Substitutes† exists for red grapes. This means that there are options for substitutes that consumers find acceptable. If we go to Safe way and see that red grapes are 3 dollars more than green grapes it is reasonable to choose the green grapes. Since there are available substitutes that are easily accessible this keeps demand elastic E. â€Å"Proportion of Income Devoted to a Good† is a concept that looks at the percent of personal income that is dedicated to a particular good or service. We have been dealing with change in percentage so price can changes can appear equal but that can have significant impact depending on what the proportion of income is. F. For example each month I pay for my Netflix subscription. For this discussion let’s say it represents 1 percent of my income. I also pay 1600 dollars a month in rent each month. If both of these items were to experience a 10 percent price increase the impact would be very different. My Netflix would go from 10 to 12 dollars. This would be irritating but insignificant. My rent however, would go from 1600 to 1920 a month. This would be unsustainable for me to maintain. Over the short term I would more than likely have limited options such as first and last month saved etc. so I may get a roommate but over the long run I would have time to choose a more reasonably priced place to live that met my needs. Demand becomes more elastic over the long run because consumers have time to â€Å"shop around† and find other solutions. G. The price range the areas on the demand curve where demand is elastic is between $80 and $50 and the qty is between 1 and 4. The price range where the demand is unit elastic is between$50 and $40 and the qty is between 4 and 5. The area of the demand cure where demand is inelastic is between $40 and $0 dollars and the quantity is between 5 and 9. We can determine this one of two ways. First is by using the calculation we discussed earlier for elasticity of demand. Second would be to use the Total Revenue Test. When demand is elastic price will decrease while revenue increases. When demand is unit elastic price will decrease however revenue will remain the same. When demand becomes inelastic price will decrease as well as revenue.

How to Write an APA Essay Online Sample

How to Write an APA Essay Online SampleThere are two basic ways to learn how to write an APA essay online sample. The first is to attend a class on the topic and take a test at the end of the semester. In the course of taking the APA test, you will have many opportunities to practice what you learned by answering questions on your own time. You can submit your essay to a journal that rates and publishes essay samples.Online colleges often publish these assignments as well. One of the most widely accepted online colleges is Kaplan University. They have an excellent selection of online courses and an entire online college dedicated to teaching you how to write an APA essay online sample.Most online colleges will have some kind of writing sample that will be appropriate for an APA essay online sample. Kaplan University has a written composition class that you can take in your free time, along with other courses that focus on writing for the APA exam. Some of these courses are for all st udents, some are just for non-specialized students who want to improve their writing.This is the most popular way to take the APA essay online sample, because the material is typically easy to read easily. There are many resources available to help you improve the style of your essay and to help you learn how to structure a good argument for each point you make. You should have some basic knowledge of logic and good writing before you attempt this assignment.You can also use a sample test as a preparation for this kind of paper. Kaplan University offers several different tests that you can take for free, with no risk involved. These tests range from brief essays to longer academic papers that cover the topics you will be writing on in your class.You can do any of these things on your online college. The only difference is that these types of online colleges are usually smaller than larger online colleges. But the lack of larger buildings with classrooms does not mean that you will n ot get the same benefits from these online college courses as you would from a traditional campus course.You do not have to sacrifice all of the advantages of a larger online college to use the format of a smaller college for your APA essay online sample. You can still take advantage of all of the resources that the larger online college offers to those who are just looking to study. In fact, it might be a good idea to pay attention to the smaller online colleges first if you are already enrolled in a larger college.For those who are considering applying to a large online college, consider taking an essay writing sample first. The student handbook may provide tips on how to choose the right essay sample for you, as well as helpful suggestions for your paper. When you are ready to take your next APA essay online sample, start off by preparing for your composition test, and then begin writing.

What made the Industrial Revolution revolutionary free essay sample

What made the Industrial revolution a revolution or revolutionary? † According to Dictionary. com, one definition of a revolution is â€Å"a sudden, complete or marked change of something. † Another definition provided on the site is â€Å"an overthrow or repudiation and the thorough replacement of an established government or political system by the people governed. † Both of these definitions can be applied, at least in part, to the industrial revolution. The industrial revolution was quite different from the other revolutions mentioned in the textbook (Chapter 28), however. The American Revolution took place in the 1770’s and 1780’s when colonists finally dissociated from British rule. The colonists were being taxed due to British debt. They were unhappy with the taxes and trade regulations and boycotted British goods. Lives were lost in battles such as the Boston Tea Party of 1773 and in Lexington in 1775. The Constitution was established granting the new Americans with the rights and freedoms they felt they were not getting from British Parliament. We will write a custom essay sample on What made the Industrial Revolution revolutionary? or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page They ultimately made a change by fighting to end the British rule over the colonies so that a new government could be established. The industrial revolution was not about battling a government to overthrow it. The industrial revolution was a massive change that had global effects. The industrial revolution ultimately began as Britain switched from wood power to coal power. Deforestation resulted in dwindling resources of wood and the British found that coal was much more abundant. Many inventions of the time impacted the industrial revolution positively. As coal became the ideal source of energy, more coal powered machines were invented. The steam engine, which was designed by James Watt in 1765, burned coal. Ultimately, the use of it became widespread and efficiency was increased. This lead to the invention of the steam powered locomotive in 1815 by George Stephenson. Transportation of goods was suddenly much more practical. The demand for cheap cotton increased and as demand increased, the efficiency needed to increase as well. John Kay invented the flying shuttle, which according to Encyclopedia Britannica, was a device that was mounted on wheels and allowed weavers to weave wider fabrics more quickly than by hand. This invention in 1733 was followed by the invention of the spinning mule in 1779 by Samuel Crompton and the water driven power loom in 1785. Factories also made the production of goods much more efficient. The increased efficiency of the production and transportation of goods lead to a change in the lifestyle of many Europeans and Americans between 1700 and 1900. Populations grew as the standard of living became higher. Children (as well as adults) thrived as poverty decreased, as food became affordable and sanitation was improved. People began to migrate and urbanization occurred. People left the country to move to the cities where factor jobs were attainable. The general way of living changed completely for most Americans and Europeans. The typical American was no longer a farmer living in poverty but instead a factory worker living in the city. In middle class families, men became the main, and sometimes sole, provider for the family. Women stayed home to raise the children and do housework rather than work alongside their husbands as many did prior. Although there were no battles or overthrowing of a government, the way of life changed drastically, arguably more drastically than life had changed for colonists after the American Revolution. People and governments adapted to the industrial demands, much like how colonists changed their government in response to British taxation. The first definition provided may best fit the Industrial Revolution as it was a complete change of the way of life.

Minimum Quantity Lubrication Essays

Minimum Quantity Lubrication Essays Minimum Quantity Lubrication Essay Minimum Quantity Lubrication Essay ABSTRACT Metal cutting fluids changes the performance of machining operations because of their lubrication, cooling, and chip flushing functions. Typically, in the machining of hardened steel materials, no cutting fluid is applied in the interest of low cutting forces and low environmental impacts. Minimum quantity lubrication (MQL) presents itself as a viable alternative for hard machining with respect to tool wear, heat dissertation, and machined surface quality. This study compares the mechanical performance of minimum quantity lubrication to completely dry lubrication for the turning of hardened bearing-grade steel materials based on experimental measurement of cutting forces, tool temperature, white layer depth, and part finish. The results indicate that the use of minimum quantity lubrication leads to reduced surface roughness delayed tool flank wear, and lower cutting temperature, while also having a minimal effect on the cutting forces. Minimum quantity lubrication. doc (Size: 2. 7 MB / Downloads: 63) password:seminarprojects CHAPTER I INTRODUCTION The growing demand for higher productivity, product quality and overall economy in manufacturing by machining and grinding, particularly to meet the challenges thrown by liberalization and global cost competitiveness, insists high material removal rate and high stability and long life of the cutting tools. But high production machining and grinding with high cutting velocity, feed and depth o f cut are inherently associated with generation of large amount of heat and high cutting temperature. Such high cutting temperature not only reduces dimensional accuracy and tool life but also impairs the surface integrity of the product. In high speed machining conventional cutting fluid application fails to penetrate the chip–tool interface and thus cannot remove heat effectively. Addition of extreme pressure additives in the cutting fluids does not ensure penetration of coolant at the chip–tool interface to provide lubrication and cooling . However ,high-pressure jet of soluble oil, when applied at the chip–tool interface, could reduce cutting temperature and improve tool life to some extent . However, the advantages caused by the cutting fluids have been questioned lately, due to the several negative effectsthey cause. When inappropriately handled, cutting fluids may damage soil and water resources, causing serious loss to the environment. Therefore, the handling and disposal of cutting fluids must obey rigid rules of environmental protection. On the shop floor, the machine operators may be affected by thebad effects of cutting fluids, such as by skin and breathing problems For the companies, the costs related to cutting fluids represent a large amount of the total machining costs. Several research workers state that the costs related to cutting fluids are frequently higher than those related to cutting tools. Consequently, elimination on the use of cutting fluids, if possible, can be a significant economic incentive. Considering the high cost associated with the use of cutting fluids and projected escalating costs when the stricter environmental laws are enforced, the choice seems obvious. Because of them some alternatives has been sought to minimize or even avoid the use of cutting fluid in machining operations. Some of these alternatives are dry machining and machining with minimum quantity lubrication (MQL). Dry machining is now of great interest and actually, they meet with success in the field of environmentally friendly manufacturing . In reality, however, they are sometimes less effective when higher machining efficiency, better surface finish quality and severe cutting conditions are required. For these situations, semi-dry operations utilizing very small amount of cutting fluids are expected to become a powerful tool and, in fact, they already play a significant role in a number of practical applications . inimum quantity lubrication (MQL) refers to the use of cutting fluids of only a minute amount- typically of a flow rate of 50–500 ml/h which is about three to four orders of magnitude lower than the amount commonly used in flood cooling condition. The concept of minimum quantity lubrication, sometimes referred to as near dry lubrication or micro-lubrication , has been sugges ted since a decade ago as a mean of addressing the issues of environmental intrusiveness and occupational hazards associated with the airborne cutting fluid particles on factory shop floors. The minimization of cutting fluid also leads to economical benefits by way of saving lubricant costs and work piece/tool/machine cleaning cycle time. Significant progress has been made in dry and semidry machining recently, and minimum quantity lubrication(MQL) machining in particular has been accepted as a successful semi-dry application because of its environmentally friendly characteristics. Some good results have been obtained with this technique . Lugscheider et al. sed this technique in reaming process of gray cast iron and aluminum alloy with coated carbide tools and concluded that it caused a reduction of tool wear when compared with the completely dry process and, consequently, an improvement in the surface quality of the holes. The drilling of aluminum–silicon alloys is one of those processes where dry cutting is impossible due to the high ductility of the work piece material. Without cooling and lubrication, the chip sticks to the tool and breaks it in a very short cutting time. There fore, in this process a good alternative is the use of the MQL technique The present work experimentally investigates the role of minimum quantity lubrication on cutting temperature, chip reduction coefficient and dimensional deviation in plain turning of AISI-1040 steel at different speed-feed combinations by uncoated carbide insert and compares the effectiveness of MQL with that of dry machining and conventional cutting fluid. CHAPTER 2 EXPERIMENTAL CONDITIONS AND PROCEDURE For the present experimental studies, AISI-1040 steel rod of initial diameter 110mm and length 620mm was plain turned in a BMTF Lathe, Bangladesh, 4 hp by uncoated carbide insert of integrated chip breaker geometry at different speed-feed combinations under dry, wet and minimum quantity lubrication (MQL) conditions to study the role of MQL on the machinability characteristics of that work material mainly in respect of cutting temperature, chip reduction coefficient and dimensional deviation. The experimental conditions are given in Table 1. Machine tool BMTF Lathe, Bangladesh, 4 hp Work piece AISI-1040 steel (size: O110mm? 620 mm) Cutting tool (insert) Cutting insert Carbide, SNMM 120408 (P-30 ISOspecification), Drillco Tool holder PSBNR 2525M12(ISO specification), Working tool geometry ? 6? , ? 6? , 6? , 6? , 15? , 75? , 0. 8 (mm) Cutting velocity, Vc 64, 80, 110 and 130 m/min Feed rate, So 0. 10, 0. 13, 0. 16 and 0. 20 mm/rev Depth of cut, t 1. 0mm MQL supply: Air 7 bar, Lubricant: 60 ml/h (throughexternal nozzle) Environment: Dry, wet (flood cooling) and minimum quantity lubrication (MQL) Table2. 1 Experimental conditions The ranges of the cutting velocity (Vc) and feed rate (So) were selected based on the tool manufacturer’s recommendation and industrial practices. The depth of cut was kept constant since it has much less significant role on the machining characteristics excepting the magnitude of the cutting forces, which simply increase proportionally with the increase in depth of cut. The MQL needs to be supply at high pressure and impinged at high speed through the nozzle at the cutting zone. Considering the conditions required for the present work and uninterrupted supply of MQL at constant pressure over a reasonably long cut, a MQL delivery system has been designed, fabricated and used. The schematic view of the MQL set up is shown in Fig. 1. The thin but high velocity stream of MQL was projected along the auxiliary cutting edge of the insert, as indicated in a frame within Fig. 1, so that the coolant reaches as close to the chip–tool and the work–tool interfaces as possible . The photographic view of the experimental set-up is Figure 2. 1 Experimental setup Figure2. 1Block diagram of MQL The MQL jet has been used mainly to target the rake and flank surface along the auxiliary cutting edge and to protect the auxiliary flank to enable better dimensional accuracy . MQL is expected to provide some favorable effects mainly through reduction in cutting temperature. The simple but reliable tool–work thermocouple technique has been employed to measure the average cutting temperature during turning at different Vc–So combinations by the uncoated carbide insert under dry, wet and MQL conditions. For the present investigation, the calibration of the tool–work thermocouple has been carried out by external flame heating. The tool–work thermocouple junction was constructed using a long continuous chip of the concerned work material and a tungsten carbide insert to be used in actual cutting. To avoid generation of parasitic emf, a long carbide rod was used to extend the insert. A standard K-type thermocouple is mounted at the site of tool–work junction. The oxy-acetylenetorch simulated the heat generation phenomena in machining and raised the temperature at the chip–tool interface. Standard thermocouple directly monitored the junction temperature when a digital multimeter monitored the emf generated by the hot junction of the chip–tool. The effect of MQL on average chip–tool interface temperature at different Vc and So under dry, wet and MQL conditions is shown in Fig. 3. The chip samples collected while turning the steel by the insert of configuration SNMM at different Vc–So combinations under dry, wet and MQL condition have been visually examined and categorized with respect to their shape and color. The result of such categorization of the chips produced at different conditions and environments by the AISI-1040 steel. The actual forms of the chips produced during machining the steel with a cutting velocity 110 m/min and feed 0. 6 mm/rev under dry, wet and MQL conditions is shown in Fig. 4. Another important machinability index is chip reduction coefficient, ? (ratio of chip thickness after and before cut). For given tool geometry and cutting conditions, the value of ? depends upon the nature of chip–tool interaction, chip contact length and chip form all of which are expected to be influenced by MQL in addition to the levels of Vc and So. The variation in value of ? with Vc and So as well as machining environment evaluated for AISI-1040 steel have been plotted and shown in Fig. 5. The deviations in the job diameter before and after cuts were measured by a precision dial gauge with a least count of 1_m, which was traveled parallel to the axis of the job . MQL provided remarkable benefit in respect of controlling the increase in diameter of the finished job with machining time as can be seen in Fig. 6. Fig. 3. Variations in average chip–tool interface temperature with cutting velocity and feed rate during turning under dry, wet and MQL conditions CHAPTER 3 EXPERIMENTAL RESULTS AND DISCUSSION During machining any ductile materials, heat is generated at the primary eformation zone, secondary deformation zone and the flank (clearance) surfaces, but the temperature becomes maximum at the chip–tool interface. The cutting temperature measured in the present work r efers mainly to the average chip–tool interface temperature. Any cutting fluid applied conventionally cannot reduce this chip–tool interface temperature effectively because the fluid can hardly penetrate into that the interface where the chip–tool contact is mostly plastic in nature particularly at higher cutting velocity and feed. However, MQL jet could have reduced the cutting temperature quite significantly though in different degrees for different cutting velocity and feed combinations as can be seen in Fig. 3. The presence of the grooves along the cutting edges and the hills on the tool rake surface and reduced chip–tool contact length may have helped the MQL jet to come closer to the chip–tool interface and thus effectively cool that interface. The difference in the effectiveness of MQL observed under different Vc and So can be reasonably attributed to variation in the nature and extent of chip–tool contact with the changes in Vc and So. The pattern of chips in machining ductile metals generally depend upon the mechanical properties of the work material, tool geometry particularly rake angle, levels of Vc and So, nature of chip–tool interaction and the cutting environment . In absence of chip breaker, length and uniformity of chips increase with the increase in ductility and softness of the work material, tool rake angle and cutting velocity unless thechip–tool interaction is adverse causing intensive friction and built-up edge formation. Table 3. Shape and co lour of chips at different vc and so condition It shows that the steel when machined under dry and wet conditions produced spiral type chips and the color of the chips become blue. The geometry of the insert is such that the chips first came out continuously got curled along normal plane and then hitting at the principal flank of the insert broke into pieces with regular size and shape. When machined under MQL the form of these ductile chips chang e appreciably into more or less half turn and their back surface appeared much brighter and smoother. This indicates hat the amount of reduction of temperature and presence of MQL enabled favorable chip–tool interaction and elimination of even trace of built-up edge formation. The color of the chips have also become much lighter, i. e. metallic from blue depending upon Vc and So due to reduction in cutting temperature by MQL. The actual forms of chips produced during turning at cutting velocity 110 m/min and feed 0. 16 mm/rev under dry, wet and MQL condition as can be seen in Fig. 4. Figure 3. 1 shape of chips at different condition Fig. 4. Actual forms of chips produced during turning at cutting velocity 110 m/min and feed 0. 6 mm/rev under (a) dry, (b) wet and  © MQL conditions. Almost all the parameters involved in machining have direct and indirect influence on the thickness of the chips during deformation. The degree of chip thickening which is assessed by chip reducti on coefficient, ? plays sizeable role on cutting forces and hence on cutting energy requirements and cutting temperature. Fig. 5 shows that MQL has reduced the value of ? particularly at lower values of Vc and So. Figure. 3. 2. Variation in chip reduction coefficient, ? , with cutting velocity and feed rate during turning under dry, wet and MQL conditions. By MQL application, ? s reasonably expected to decrease for reduction in friction at the chip–tool interface and reduction in deterioration of effective rake angle by built-up edge formation and wear of the cutting edge mainly due to reduction in cutting temperature . MQL provided remarkable benefit in respect of controlling the increase in diameter of the finished job with machining time as can be seen in Fig. 6. Figure. 3. 3. Dimensional deviations observed after one full pass under dry, wet and MQL conditions In straight turning, the finished job diameter generally deviates from its desired value with the progress of mac hining, i. e. long the job-length mainly for change in the effective depth of cut due to several reasons which include wear of the tool nose, over all compliance of the machine–fixture–tool–work (M–F–T–W) system and thermal expansion of the job during machining followed by cooling. Therefore, if the M–F–T–W system is rigid, variation in diameter would be governed mainly by the heat and cutting temperature . With the increase in temperature the rate of growth of auxiliary flank wear and thermal expansion of the job will increase. MQL takes away the major portion of heat and reduces the temperature yielding reduction in dimensional deviation desirably CHAPTER 4 CONCLUSIONS Based on the results of the present experimental investigation the following conclusions can be drawn: The cutting performance of MQL machining is better than that of conventional machining with flood cutting fluid supply. MQL provides the benefits mainly by reducing the cutting temperature, which improves the chip–tool interaction and maintains sharpness of the cutting edges. Due to MQL, the form and color of the steel chips became favorable for more effective cooling and improvements in nature of interaction at the chip–tool interface. 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