E cigarettes Research Paper Example | Topics and Well Written Essays - 1500 words

E cigarettes - Research Paper Example This paper will look into the similarities in the physical description of the e cigarette and the cigarette. I shall discuss the chemical components that make up the e cigarette and whether smokers prefer one product over the other and why. Then I shall conclude as to whether the cigarette or e cigarette is the better, healthier alternative to a quick nicotine fix. The similarities between the cigarette and e cigarette mainly lies in the fact that they both look like regular cigarettes. But while one has to be lit and puffed on in order to draw out the nicotine, thus burning away the paper and tobacco base of the product, the e cigarette is electronic based and relies on an electronic delivery system to deliver liquid tar into the system of the user. The use of the e cigarette is described as: Electronic cigarettes typically use a rechargeable battery-operated heating element to vaporize the nicotine in a replaceable cartridge. Nicotine is usually dissolved in propylene glycol, a clear and colorless liquid that is commonly found in inhalers, cough medicines and other products. The only commonality between the regular cigarette and the e cigarette is the fact that they are both meant to produce a particular type of smoke flavor that smokers can easily recognize. However, the flavor is produced in regular cigarettes by burning tobacco rolled in paper while the electronic cigarette creates the flavor using an atomized liquid. (â€Å"Comparing Regular Cigarettes with Regular Cigarettes†). In fact, both types of cigarettes are known to produce certain types of illnesses in their users that shall be discussed in later parts of this paper. Cigarettes evolved from the pipe that our forebears used to stuff with tobacco leaves and then burn while being sucked from one end of the pipe. To make it more convenient to use and carry, the paper burn based version was created. The smoker creates an unhealthy vapor and tar by-product each time that he smokes a cigarette. The e cigarette on the other hand creates a harmless vapor that looks like a harmless mist when exhaled. This particular type of cigarette does not produce 2nd hand smoke problems or get its smell into clothing, hair, or upholstery (â€Å"Are e-Cigarettes Safer than Real Cigarettes?†). Having said that, those who have made the switch from regular cigarettes to e cigarettes claim the aforementioned reason as the main basis for their switch from the real thing to the electronic version. The e cigarette is actually allowed in non-smoking places and other places where cigarettes would normally be banned. Although Hon Lik, the Chinese pharmacist who invented the e cigarette in 2003 had high hopes for the health benefits of his product when it was first introduced, the reality of the situation is that the product was released with very little product study and scientific observation. Very little is currently known about the e cigarette in terms of effects on the human body and whether it mimics the after effects of long term cigarette smoking as well. Although there is existi ng information regarding the effects of tobacco and nicotine absorption and inhalation by people, there is very little to no information available pertaining to the effects of nicotine in liquid form. What would happen if the nicotine vial in the e cigarette were to come into direct contact with the skin? Are there any health hazards related to the prolong use of propylene glycol? These are some of the reasons that the American Food and Drug

Creative Writing and High School Essay Example for Free

Creative Writing and High School Essay Creativity is Everything: You can Make Writing Fun by being Creative If someone was to come up to me and ask me what kind of writer I am, I’d say that I someone who enjoys making up fairy tales along with reading and watching movies about fairy tales. I am a writer who likes to use their imagination, this is due to the kinds of books that I use to read. I wanted to be the next Dr. Seuss. Growing up, my imagination is all I really had. My family had to move a lot because my dad always had to switch jobs. We’d move to different states every couple of months, sometimes we’d stay for a year or two. I never really had anything stable. I couldn’t participate in any sports or extra-curricular activities. There was one thing that I did have though, I had my imagination. With my imagination, I drew the weirdest pictures and wrote from the most magical to the most gruesome stories I could. I always had myself occupied with my stories. I was never bored when we were on the road, I’d be writing random ideas for stories in my spiral notebook if we were on the road and read books like there was no tomorrow. I made writing and reading fun for myself and I enjoyed doing it. My Timeline with Reading As with all children, they being with their parents reading bedtime stories to them. I loved being read to at night. My favorite bedtime books were several Dr. Seuss books like One Fish, Two Fish, Red Fish, Blue Fish and Green Eggs and Ham. As I got older I began to read poetry more than anything. My all time favorite author is Shel Silverstein; he is one of the most brilliant and talented poets. He has helped me improve in my reading, as well as my writing. Some of the books I could never put down was The Missing Piece, The Giving Tree, and Where the Sidewalk Ends. Throughout my elementary days to middle school and high school, I have read at least over one hundred books, written vigorious reports over the years and have changed my point of view towards reading and writing all together. 1984 by George Orwell did it for me, along with Lord of the Flies; I read these two books my senior year and they really made an impact on me. 1984 really freaked me out, it had me thinking, what if there really is a Big Brother in our world; Lord of the Flies made me realise that there are monsters in all of us, and only some of us are pure and innocent, like Simon was. Transforming from Doodle Writer to Competitive Writer In 2004, I was located in the Belleville/Canton area here in Michigan. I attended Henry Ford Elementary. My teacher’s name was Ms. Dixon. This wonderful woman was the one who really started to get me into writing a lot more . At Henry Ford, we had an annual fourth and fifth grade writing contest. No fourth grader ever wanted to enter it, but they still did to try to impress each other with their stories. Looking back, I felt skeptical about doing the writing contest. I had no idea what I should write about! I was having a writer’s block. No good ideas came to mind; I was stumped. A few students in my class chose to write about their pets or what they wanted to be when they grew up, but that just wasn’t my style. After a couple of days, something popped into my head. Halloween was around the corner shortly; I decided to try to come up with a nasty, disgusting story that formed around the Halloween theme. I started to brainstorm, then it hit me. The perfect idea for a story. It was gruesome, disturbing, creepy, and just nothing you’d think a fourth grader would write about. My very short, scary, story was about a two-headed baby who was found behind a dumpster on evening, the parents took the baby into their home. Come to find out the baby is a cold-blooded murder; one who slaughtered anything in its path (I told you that you wouldn’t think that a fourth grader would write about something like this). I ended up winning second place in the writing contest, that’s when my writing started to expand. Progressing throughout School with Writing and Reading As time went on, I was out of elementary school and into middle school. This was the time when book reports really made me not like writing. As much as I am a book reader over a writer, writing papers on books†¦ It was just wrong in my mind. I wrote book reports on Helen Keller, astronauts, Rosa Parks, the Holocaust, etc. I never really enjoyed the reports, they took the fun out of reading for me. Eighth grade came we started to write about who our heroes were; I wrote about my baby cousin that had died a year before. He was my rock. That was basically my main focus point for all my papers. After I left middle school, I started to attend the high school, Lincoln High School. This school has had me on a roller coaster since day one. We immediately began to read, How to Kill a Mockingbird, we had to analyze and write about the morals of the story. As time went on, I found out that I qualified for several AP English classes. Junior and senior year, I took AP British Literature, AP Issues in Fiction, and AP Creative Writing. The only class that I enjoyed going to was my creative writing class. In that class I was able to write about anything that I wanted. I wrote about fairy tales, I wrote a children’s book for the elementary kid, short stories, everything! I felt at home, comfortable with writing rather than I felt in my other two English classes. I am a creative writer, I write what comes out of my heart and mind. Everything I wrote just had an amazing flow, I never ever want to stop writing as long as I can make it fun for myself; and make it interesting for others to enjoy too! Where I am Today as a Reader and Writer I am in college now, so there is a lot that has changed. Im still a very creative writer, there isnt a class that Ive came across yet that I can take where I can express my creativity in writing. I am hoping that down the road Ill come across a class that is somewhat like my high school creative writing class. I still read regularly, I just finished the 50 Shades of Grey trilogy by E. L. James, and Ive got to say, I never thought that Id have so much interest in a book that has such a vulgar topic. I know deep down that I have room for improvement with my writing skills as well as my reading, and Im hoping to improve myself better throughout the next four years that Im going to be spending at Eastern.

Access Control System Project Plan

Access Control System Project Plan Brian Jerozal   Project Scope Statement The project of installing an access control system in a dormitory is requirement which is coming from the Board of directors of college. Scope of the project is to develop a system which ensure the authorized access in to the dormitory and record all the activities which are taking place at the door of dormitory in order to identify the potential threat who is trying to get the unauthorized access in to the dormitory. For getting entry, user authentication will be requiring which will take place when register person will use his/her issued identification card against the electronic proximity reader. This project is big step form collage to ensure the security at the campus. Project goals is to implementing an access control system (ACS) in a dormitory by integrating an electronic proximity reader, application which will handle this device and will do verification of user form created database and the existing security camera who will monitor all the activities and will record them in order to ensure the secure access to the dormitory. Deliverable of this project will be the video footage of dormitory access activity and overall working system. The student or appropriate personnel will have three opportunities to open the entryway if the client neglects to open the entryway on the third endeavor then the alert will go off. The ACS will likewise be intended to permit the security chairman to make changed for the ACS operations. These progressions will be the camera positions setting the caution time and setting the time the quarters entryways will bolt. The gadget utilizes a reception apparatus curl to control the RFID tag implanted in the understudy ID c ard which peruses the actuate reaction from the card. The reaction is then separated and controlled into helpful information and deciphered by the security program. This procedure cautions the manager PC by means of serial line and hyper term. In the event that the card is perused and it is not in the code database a red LED flashes for three seconds. A dedicated team of 5 resources will be assigned for this project. Overall project cost including the hardware devices is $15,000. Total duration of project is 3 weeks. First team has to show an internal demo of this project and then final representation of project will be done in the presence of board members of college at the time of project delivery. Five Major Task with Subtasks Task 1 Installing the Electronic Proximity Reader Fixing the proximity reader at the door Doing all the required connection with the door locks In this tasks need is to implement physical reader at the door. Requirement is to do all the connection with the door also, so that door can be controller for lock and unlock process. Task 2 Development of Access control authorization application Development of the application which will do the verification in Java Intergradations of the Application with the proximity reader device Develop an application in java which will be able to fetch from database and will get the identification detail form reader and will match them. On successful match, it will send the information to control panel to unlock the door. Task 3 Creation of database Maintaining a database of all the members and their identification card Accessing Database with the Application Need is to create a data base of college which will have all the information about identification in the form of relation tables. Add functionality in the application to get the data from Database. Task 4 Application development for Handling Security Camera Application development for handling camera movement and to handling recording process Storing all the video to a shared location which requires secure access Add functionally to handle the camera and its movement forms the application whenever some user comes at door and uses reader to get entry. Store all the recorded video at particular location Task 5 Integration of Complete system with security camera system Implementing the interface between camera and application    Overall system testing after the integration for complete process Create interface between panels and integrate the entire component. Test manually complete functionally and video stored by security camera. Gantt Chart illustrating the project Tasks System diagram of Application References Benantar, M. (2006). Access control systems: security, identity management and trust models. doi: 10.1007/0-387-27716-1 Norman, T. L. (2011). Electronic access control. Retrieved January 26, 2017, from https://books.google.com/books?id=TmRRTfAPfdYCprintsec=frontcoversource=gbs_ge_summary_rcad=0#v=onepageqf=false Rosenblatt, H. J. (2014). Systems Analysis and Design, 10th Edition. [Strayer University Bookshelf]. Retrieved from https://strayer.vitalsource.com/#/books/9781337003186/

The Black Panther Tank Battalion Essay -- essays research papers

The 'Black Panther' Tank Battalion The 761st 'Black Panther' Tank Battalion was the first African-American armored unit to see combat. Before and during mobilization for World War II, officials in Washington, D.C., debated whether or not African-American soldiers should be used in armored units. Many military men and politicians believed that blacks did not have the brains, quickness or moral stamina to fight in a war. Referring to his World War I experiences, Colonel James A. Moss, commander of the 367th Infantry Regiment, 92nd Division, stated, "As fighting troops, the Negro must be rated as second-class material, this primarily to his inferior intelligence and lack of mental and moral qualities." Colonel Perry L. Miles, commander of the 371st Infantry Regiment, 93rd Division, voiced a similar opinion: "In a future war, the main use of the Negro should be in labor organizations." General George S. Patton, Jr., in a letter to his wife, wrote that "a colored soldier cannot think fast enough to fight in armor." The armed forces embraced these beliefs even though African Americans had fought with courage and distinction in the Revolutionary War and every other war and conflict ever waged by the United States. They overlooked the fact that four regiments of the 93rd Division had served with the French during World War I and that the French government had awarded the coveted Croix de Guerre to three of the four regiments and to a company of the fourth, as well as to the 1st Battalion, 367th Infantry Regiment, 92nd Division. Lieutenant General Leslie J. McNair, chief of the U.S. Army ground forces, was the main proponent of allowing African Americans to serve in armored units. He believed his nation could ill afford to exclude such a potentially important source of manpower. The black press, the National Association for the Advancement of Colored People, and the Congress of Racial Equality also placed increasing pressure on the War Department and President Franklin D. Roosevelt's administration to allow black soldiers to serve on an equal footing with white soldiers. In the summer of 1940, Congress passed into law the Selective Training and Service Act, which said, "In the selection and training of men under this act, there shall be no discrimination against any person on account of race and color." In October, howeve... ...17th Airborne Division. Assigned at various times to the Third, Seventh and Ninth armies, the Black Panthers fought major engagements in six European countries and participated in four major Allied campaigns. During that time, the unit inflicted 130,000 casualties on the German army and captured, destroyed or aided in the liberation of more than 30 towns, several concentration camps, four airfields, three ammunition supply dumps, 461 wheeled vehicles, 34 tanks, 113 large guns, and thousands of individual and crew-served weapons. This was accomplished in spite of extremely adverse weather conditions, difficult terrain not suited to armor, heavily fortified enemy positions, extreme shortages of replacement personnel and equipment, an overall casualty rate approaching 50 percent and the loss of 71 tanks. In 1978--33 years after the end of World War II--the 761st Tank Battalion received a Presidential Unit Citation. In 1997, 53 years after giving his life on the battlefield, Sergeant Ruben Rivers was posthumously awarded the Medal of Honor. The motto of the 761st Tank Battalion has always been "Come Out Fighting." In World War II, that is exactly what the Black Panthers did.

Categories Of Carbon Steel Their Compositions Engineering Essay

‘STEEL ‘ is used for assorted metals of Fe. These vary from each other depending on the content and % of stuff added to the Fe base solution. On must maintain an of import factor in head, all steels contain a % degree of C + Manganese + Silicone + Sulpher. By increasing C to establish solution the stuff will increase strength and hardness therefore improves drastically the harden-ability. On the other manus C reduces the capableness of weld-ability and increases crispness. Several types of steels exist in our markets, the most common being ; field C, chromium steel, alloyed and tool steel. Carbon steel is one of the largely used steels in several industries. As explained antecedently, its belongingss are dependent largely on the % of C added but the other elements have minor influence excessively. One of import factor sing Plain Carbon Steel, is that this is a type of steel incorporating up to 1.5 % of C. One must foreground that most of the C add-ons in C steel are less than that of 1 % . Some applications of these steels are structural beams, auto frames, etc. ( Capudean, 2003 ) ( Iron Making & A ; Steel MAking, 2008 ) ( Jr. , 2007 ) Harmonizing to the ‘Steel Classification Society ‘ , Carbon steels are sub divided into four chief classs ; – Low Carbon Steels /Mild Steels ; these steels have less than 0.25 % of C, and these are the largely used class of C steels. Normally this type being unresponsive to heat interventions, intended to organize a martensitic construction, beef uping is achieved by cold working the portion due to low C content. These are really easy to organize steels with accomplishing popularity largely for not high strength applications. Some belongingss are ; Very tough, inexpensive sing costs ( least expensive to bring forth ) , they are easy machined ( more ductile than high C steels ) and welding belongingss are besides really good. Typically these have 275MPa – output strength, 450 – 550 MPa – tensile strength, and 25 % EL – Ductility. For such a ground, these are normally used in applications as Bridgess due its ability to deform under burden and return to its original. ( B ) ( Capudean, 2003 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktopRoadRailBridges.gif Medium Carbon Steels ; incorporate 0.25 % up to 0.55 % C. When it comes to belongingss, increasing C besides means a direct influential addition in hardness + tensile strength. On the other manus this besides effects severely the ductileness which makes it more hard to machine. Heat intervention to really thin subdivisions can better such machinability issues. These may be austinized by slaking and annealing afterwards to better such belongingss. These are comparatively stronger than the old class, whilst weaker than the high C steels. One common application of medium C steel is the production of crankshafts where high strength and stiffness is required to defy high tonss and opposition to tire when it comes to uninterrupted tortuosity and bending. Typical values are, 450-580MPa – output strength, 600-750 MPa – tensile strength, and 20-30 % EL – Ductility. ( Corus, 2010 ) ( Jr. , 2007 ) ( Iron Making & A ; Steel MAking, 2008 ) Degree centigrades: UsersNathanielDesktop1108phr-03+383ci-small-block-chevys+pistons-and-crankshaft.jpg High Carbon Steels ; incorporate 0.6 % up to 1.4 % of C. In a heat treated status it is able to defy high shear and wear hence, these are used in applications where stiffness and hardness play an of import portion such as in rope wire, besides good in prolonging crisp film editing borders. Unfortunately, these are the least malleable and really difficult to weld, in fact preheating and station warming ( commanding of chilling temperature ) is critical in order to obtain good welding sections and accomplish good mechanical belongingss. Since at their maximal hardenable conditions, these are the most brickle devising this a large drawback for this steel. ( B ) ( Jr. , 2007 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktopwire-rope2.jpg Very High Carbon Steel / Tool Steels ; are a ‘sub group ‘ of high C steels and contain lower limit of 0.8 % C. These have weak welding belongingss and ductileness, but are really good when it comes to strength, hardness and wear opposition that ‘s why it is really normally used in centre clouts. An of import factor for these sorts of steels is that most of them are used in a hard-boiled + tempered status. ( Jr. , 2007 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktop oolsteel.jpgP7: Question 2Select an industry and supply a brief over position of one metal forming technique used.The preciseness metal organizing procedure I will be discoursing is the Powder Formation ( PM ) . This gives an alternate cost effectual range towards stomping, hammering, machined parts and projecting. This is characterized one of the most enforced preciseness metal organizing technique in the modern industry and it is normally found in the automotive industry. Most vehicle parts presents are produced by such a procedure. PM combines pulverization compression with optimum physical belongingss with controlled high temperatures atmosphere sintering. ( Turkish PM ) Degree centigrades: UsersNathanielDesktopimage001.gif Such a procedure offers ideal benefits that you can non accomplish with using other metal working procedures. Mentioning merely a few, it is really material efficient since the finished portion uses 100 % of the stuff, whilst in other organizing techniques one will hold wastes. The procedure is really good in making intricate forms with minimum cost add-on. Some illustrations could be splines, cogwheels, away centric parts, etc ) . Sometimes this besides reduces assemblies since most of the assembly parts can be produced in a individual formation by PM. The PM clouts and rods produce parts with closer tolerances. A assortment of standard metals are specifically suited for PM processing, nevertheless intermixing can be easy done to run into specific belongings demand. Automatic rhythms make the PM procedure really labour efficient. The lone back draw is to put up the parametric quantities for the tooling, but as this is done, the procedure can bring forth parts at a really efficient r ate. High temperature Powder Metal ( HTPM ) , is able to accomplish 88-96 % of the material theoretical denseness. Since every stuff belongingss depends on denseness ( elongation, output strength, etc ) , HTMP outperform other procedures. ( GT.b, 2012 ) ( J, 2011 ) ( Marciniak, 1988 ) The high temperature metal pulverization procedure is divided into 4 chief sectors ; Blending – here high pureness metals pulverizations and additives are studied so funneled down to choose the optimal pick for the application in order to run into the coveted belongingss to the application. For illustration in the automotive industry, this procedure is used to organize panels. Here aluminum pulverization with anti oxidation additives and silicone for elastic belongingss are added in order to organize the ideal mixture for the door panel. All the pulverizations are assorted with particular lubricators which helps treating the pulverization flow. As mentioned before, blending the pulverizations in a solid province provides new chances to come up with new belongingss unique merely to HTPM. Compacting – Powdered metal is fed from a hopper into a provender shoe. The provender shoe delivers it into a die pit. Here multiple pulsations compress it into 50 % of its original capacity. Second strength packing forces realign and deform the atoms whilst implementing local mechanical bondings organizing a portion known as ‘a green portion ‘ . These are ejected carefully by automated machines and conveyed to the following measure. Compacting imperativenesss vary from 5 up to 900 tones and are capable of multiple gestures. Sintering – this involves puting the green portion in temperatures above 1300AÂ °C ( but below runing points ) . By such a procedure a batch of benefits are achieved, metallurgic bonding is enhanced, ductileness and stamina are besides improved. The initial art of the procedure cleans lubricators and surface of the metallic atoms to guarantee perfect mechanical belongingss sing the finished constituent. At the 2nd portion of this procedure ( go forthing portion in high temperatures ) , this allows energy to transform mechanical bonds to metallurgical bonds. Completing – sizing / coining are post operations that can be used for more complicated and minor tolerance dimensions, ( illustration – engine parts like cylinder valves, linking rods, etc ) . Extra coating assets could be milling, crunching etc. From here it can come on to a connection procedure. After joined this can besides be heat treated and plated. Heat intervention goes up to 550AÂ °C to do a bed of Fe3O4A which acts as corrosion resistant, and increase in hardness. ( N.A. ) ( GT.b, 2012 ) ( J, 2011 ) ( Marciniak, 1988 ) Note- A presentation will be held in category explicating the procedure in more item. Degree centigrades: UsersNathanielDesktopcycle.jpgP8: Question 3Distinguish between merger & A ; non merger, besides select one procedure and discuss. Finally supply one application and besides discuss.Welding is a procedure to bring forth high strength lasting articulations between two ( or more ) parts that need to be connected with each other by agencies of a weldment ( metallurgic fall ining subdivision ) . There are assorted ways to obtain such a connexion and with today ‘s engineering we are accomplishing better belongings results when it comes to post welding belongingss. Chiefly the procedure involves heating a portion, runing the portion / base metal ( depending on which procedure is adopted ) and connection of the stuff occurs as temp start to chill down. Thus the procedure required relies chiefly on the application of heat and force per unit area. One common welding factor is that the metallurgic construction of any metal will be changed station to welding. This coul d take to a station welding heat intervention procedure. ( T, 2010 ) ( Key to metals, 2007 ) Welding is divided into two chief groups, depending on the physical province of the base metal during the procedure that of the base metal being in liquid province or in solid province. These procedures are better known as merger and non merger welding techniques. In order to choose which welding procedure demands to be selected one should first analyze both the welding procedures and addition information sing pre dyer's rockets and station dyer's rockets. ( YAÂ ±lmaz, 2007 ) Fusion / Liquid State Welding ; this is the most common type of welding found in the industry due that the dyer's rocket produced is really strong. In this sort of fall ining procedure, the base metal is melted in order for the dyer's rocket to happen. Apart from the heat beginning a filler stuff ( consumable electrode ) may be fed besides into the welding pool. This procedure may besides utilize a protective bed between our environing atmosphere and the liquefied metal ( gas shield or flux ) . This protection consequences in a scoria on top of the welded seam which subsequently on solidifies and can be removed. There is a assortment of merger welding processes that can be used holding a different belongings result. ( Marinov ) Three major classs of merger welding are found which are bomber divided into different procedures ; Arc Welding: in this sort of procedure warming and thaw of the stuff is done by an electric discharge. Some illustrations of discharge welding could be ; Shield metal discharge welding, , Gas tungsten arc welding, Plasma discharge welding, Gas metal discharge welding, Flux cored arc welding, Submerged discharge welding, Electroslag welding. Gas Welding ; for this sort of welding the gas produces a fire that melts the basal stuff. An illustration of such procedure is ; Oxyacetylene welding High energy beam welding ; here a high energy beam is shot between the two parts held together under force per unit area. As the temperature starts diminishing after the beam Michigan, the parts start to bond together. Some illustrations of this procedure are ; Electro beam welding & A ; Laser beam welding. Basically all the procedures reference antecedently for merger has the same principals. A heat / energy beginning is concentrated on a really little country and a weld pool is produced. These heat beginnings for merger are arc, high energy beams and gas. Obviously the power denseness rises from gas fire to an electric discharge to a high energy beam. For the classs mentioned below we can analyze a graph demoing the heat input to the work piece vs power denseness of heat beginning. It is reasonably obvious that as the power of the heat beginning additions, the heat input to the welded portion decreases. Therefore the less the power denseness of the beginning the larger the affected country. Excessive clip for heating can do harm to the work piece, by changing the belongingss including deformation and weakening. ( Schwartz, 1979 ) Degree centigrades: UsersNathanielDesktopUntitledff.png Therefore one of the advantages on power denseness increaser is deeper incursions, optimum welding qualities, and less exposure clip for the welded portion. This procedure is besides various, and adaptable for confined infinites. On the other manus some disadvantages are, it is non every bit productive as uninterrupted wire applications, current bounds are critical to find the joint potency. ( Liverpool, 2000 ) Non Fusion / Solid State Welds ; for this type of welding heat is applied merely for the base metal to soften in its solid province in order to ease fictile distortion or rush up the solid province diffusion. As the name provinces, in non merger welding the stuffs are joined together without the demand of runing the base metal. Here the stuffs to be joined are brought together at equilibrium spacing for fictile distortion through high temperatures ( below runing point ) and force per unit areas. Some of the chief non merger welding techniques are ; Cold welding: In this procedure the dyer's rocket is achieved by the force per unit area and little lift in temperature due to cold working. Some typical illustrations are ; Press welding & A ; Roll Welding. Clash welding: For this procedure the dyer's rocket is achieved due to the heat produced due to using force per unit area between the parts i.e making clash. Some illustrations are ; Radial Friction welding & A ; Orbital Friction Welding. Diffusion Welding: here both parts are held together under changeless force per unit area, promoting the temperature somewhat and left invariable for a peculiar clip frame ( depending on the stuff ) . Some illustrations are ; Conventional Diffusion welding & A ; Deformation Diffusion welding Solid State Deposition Welding: Chemical reaction bounding. Degree centigrades: UsersNathanielDesktopspwmtfeb2001f1.jpg The first advantage of such a procedure is that low heat is required, hence minimum disruptors in crystalline construction are noticed since no thaw temperatures are required. This could besides be applied for stuffs within the same category or even within different categories due that no intermixing is involved. The chief disadvantage is that for such a procedure big, fixed machineries are required and this is a consequence for big capital financess to purchase the equipment required. Another disadvantage is that this procedure is non really feasible to be applied for little graduated table applications since its complicity. ( Jr, 2004 ) ( Lancaster, 1999 ) Describing one peculiar welding method, the method I will be discoursing is the ‘Hyperbaric Welding Process ‘ normally known as under H2O welding. This procedure falls under the class of Fusion welding. This is a really good illustration of welding in an unusual, critical environment. For such a procedure the welder must be an A class welder plus a commercial frogman in order to defy the harsh and unsafe sea conditions nature has to offer. ( Mukund, 1974 ) Degree centigrades: UsersNathanielDesktop2071602_f520.jpg In order to delegate instantly the procedure with an application mentioning advantages, disadvantages, equipment, restrictions and safeguards, the underwater welding is a procedure used in the offshore industry. The offshore industry covers the fixs of vass ( any kind ) , boring platforms ( jack up rigs, semi submergible rigs, self propelled rigs ) , Bridgess, etc. These constructions face terrible conditions conditions and are invariably flexing in multi conditional environments, hence the hazard of harm and failure is far greater. Basically this sort of welding is ideal and it is really flexible since the work could be done under the water line, therefore the natation works could be repaired in place without the demand of docking the platform to obtain dry conditions. This consequences in less sweeps and loss of valuable boring clip. Restrictions of such a procedure for our boring platform application are that the system is necessarily bulky and expensive to run. For such an application normally low to intercede C steels are used. Steels are designed as CT and a figure after to demo the C content. The most common steel found in this industry is CT3. Low and intermediate C steels are ideal since these have high malleability and sensible dyer's rocket ability. A The weld ability of depends on their C + manganese content in concurrence with their dross degrees. At low C degrees that of less than 0.15 % , the steels are non difficult and the dyer's rocket ability is excellent.A For the medium C type, 0.30 – 0.60 % C is found and these can be welded easy by agencies of discharge welding. Unlike the surface normal discharge welding, where such intermediate C have higher hardness and martinsite formation, in dry conditions pre warming and station warming are required. For deep sea dyer's rockets alternatively of pre warming and station warming, the dyer's rocket is non performed at one spell but with intermediate intermissions. ( Martikainen ) ( Sacrificial Metal, 2012 ) Degree centigrades: UsersNathanielDesktopcorrosion_drill ( 1 ) .jpg Basically there are two categorizations to execute submerged welding. The choice of the proper method is selected after an submerged structural / hull study and the parametric quantities of the submerged environment. The welding categorizations are ‘Dry Welding ‘ & As ; ‘Wet welding ‘ . Wet Welding ; here the welding is performed to the direct exposure of the wet conditions. Here the ‘Manual Metal Arc ‘ procedure is used. The principals of such a procedure are fundamentally the same as that of Arc Welding on dry land but in this instance a particular H2O cogent evidence electrode is required in order to protect the electrode ‘s nucleus. This is the most efficient and cost effectual welding method found amongst all under H2O welding. For this method the power supply is located on the surface of the H2O ( dry conditions ) and the overseas telegrams and hosieries are fed to the frogman via overseas telegram defenders ( big flexible piping ) . The power supply provenders direct current ( DC ) 300 – 400 As through overseas telegrams with negative mutual opposition. If positive mutual opposition is used in DC electrolysis will occour and causes rapid impairment of the metallic constituents in the electrode manus held holder. DC currents are used alternatively of AC ( Alternating ) due to electrical safety and the trouble of keeping the discharge in wet conditions. Motor generator welding machines are normally used. For the moisture type welding it is of import that the circuit includes a knife switch ( Positive type ) . This sort of switch is operated on the surface but eventually commanded by the frogman for optimal safety. This switch should be capable of interrupting the full welding current and stops the dyer's rocket ax the switch is non-operated. As mentioned antecedently, even the electrode itself should hold a particular coating of waterproofing. Basically all connexions should be insulated in order that no H2 O comes in contact with any metal parts. If this insularity is damaged, current will leak and will non be available in the discharge. ( Levi, 2010 ) This method is low cost compared to dry welding, it is besides an onsite occupation i.e. no demand of complex equipment an the frogman can make places of the offshore construction that could non be reached by other types of welding. Some disadvantages are that there is an immediate quench of the welded articulation due to environing Waterss ( additions tensile strength – decreases ductileness & A ; increasure in porousness and hardness ) .large sums of H is present taking to disruptions. H2 dissolves in heat affectional zone and the welded articulation could check. The chief disadvantage is the safety issue sing visibleness and currents Degree centigrades: UsersNathanielDesktopWelding.Programs.jpg Hyperbaric Dry Welding ; here the dyer's rocket is done in a certain chamber. This chamber is normally filled up with He incorporating 0.5 saloon of O at positive force per unit area somewhat above ambient. These dyer's rockets are somewhat higher in quality that of moisture welding and run into X-ray cryptography demands. For such a procedure the ‘Manual Metal Arc ‘ is used or the ‘Gas Tungsten Arc ‘ welding is used ( depending on the welder accomplishments ) . The welding is done in dry conditions but at hydrostatic force per unit areas of the deepness of the environing sea. For the dry dyer's rocket procedure the welding power generator could be AC and DC. Degree centigrades: UsersNathanielDesktopCommercialDryBell.jpg Some advantages of dry welding are that the frogman is safer since the dyer's rocket is performed in an enclosed chamber, hence no direct distractions from currents, and visibleness is much better than moisture welding since the chamber is illuminated. Good quality dyer's rockets are achieved comparable to come up welding and H2 degrees are much lower than H2O dyer's rockets, not distructave proving could be performed in the chamber. Some disadvantages are that the procedure requires much more capital and support at the surface as the method is much more complex, the cost additions with deepness, and the procedure is non every bit flexible as the unfastened H2O dyer's rocket as the connection subdivisions should suit the enclosed chamber. ( Akers, 2012 ) To depict the procedure of Manual Arc Welding, the work that is traveling to be welded should be straight connected to the positive side of the electric circuit via overseas telegrams. Sometimes the Earth overseas telegram incorporates more than 1 connexion in order to obtain the best circuit continuity for the land. A flux ( plus H2O proofing ) electrode is connected to the manus held holder via another overseas telegram which are connected to a power welding coevals beginning. When the tip of the electrode touches the work piece, the current discharge from the spread and causes a flicker which melts the base metal and the electrode organizing a dyer's rocket puddle. Degree centigrades: UsersNathanielDesktopwelding-circuit.gif Comparing both diagrams we can detect some differences. For the moisture procedure, DC current, a knife switch and dual insularity overseas telegrams are required. The mutual opposition is -ve, whilst the circuit is fundamentally the same. As the discharge is moved off from the work piece, the pool solidifies and the articulations are fused together. This welding pool is controlled by changing the current which flows through the discharge being produced and by altering the electrode diameters. Typical temperatures are those of 5000Â °C. by such a procedure a consequence of metallurgical bonding is achieved through the work piece. At these elevated temperatures, metals are ‘active ‘ and if it comes in contact with air it rusts immediately and the mechanical belongingss of the joint fail. For such a ground the discharge welding provides agencies of screening to the dyer's rocket pool ( gas, scoria ) . This is known as metallic discharge shield and is accomplished by the flux covering the electrode nucleus. The scoria produced as the pool cools and solidifies has its map to minimise contact of dyer's rocket to air until temp lessenings. The discharge creates a little pit formed inside the flux. This is for the flux to fire slower than the metal barrel i.e. helping in the protection and control of the metal sedimentation that leave the electrode. For the welding procedure this is a critical in order to keep a changeless discharge and weld articulation. Even in hapless under H2O visibleness, the frogman needs to maintain force per unit area on the electrode to keep a changeless good provender rate. In under H2O welding in is really of import to advert that the discharge behaves otherwise than it does in air. In H2O gas bubbles are a really of import factor as these create an unstable discharge for good welding conditions. In concurrence with this, it is much more hard to command the dyer's rocket puddle. The frogman must put currents by test and mistake depending on the Waterss conditions ( temp, salt, etc ) . Apart from this there is no difference between surface and under H2O welding. ( Kaets, 2000 ) Degree centigrades: UsersNathanielDesktopshielding-weld-arc.gif When compared to other welding procedures Manual discharge welding is normally used because the equipment is comparatively easy to utilize and inexpensive ( compared to other types ) , it is flexible, portable, and ideal for the frogman to utilize in confined infinites, no gas shield is required and eventually it is suited for about all sort of metals and metals. Some disadvantages of discharge welding are that the electrode needs to be replaced often ( more exposed to daze ) , the scoria should be removed after the dyer's rocket is performed, and the procedure is somewhat slower since the rate of deposition is slower than continuously fed electrode procedure ( Gas Tungsten Arc ) . ( Kaets, 2000 ) One last note sing under H2O welding ; there is a procedure non normally used which features a specially built keeping torch which sprays a changeless cone made of high force per unit area H2O, with protective gas under force per unit area to insulate the welded are from the H2O during the dyer's rocket is performed. Besides a recent development was done affecting under H2O optical maser beam welding. This method is still being improved but will shortly be applicable for the offshore industry. ( Clutter, 2012 )

Of Mice and Men by John Steinbeck †Literature Essay

Of Mice and Men by John Steinbeck – Literature Essay Free Online Research Papers Of Mice and Men by John Steinbeck Literature Essay In John Steinbeck’s novel Of Mice and Men, there are many recurring events. Out of all of the recurring events within the novel, the most significant events were the death of Candy’s dog and the murder of Lennie. These two killings have very much in common, and yet at the same time they have very many differences. Foreshadowing is one reason why many events reoccur throughout the novel. The first most significant event of the novel would have to be to death of Candy’s dog. The main reason why this event is significant is because it shows some meaning of foreshadowing about Lennie’s death. â€Å"A shot sounded in the distance. The men looked quickly at the old man. Every head turned torward him.† This quote shows that Carlson had finally shot the dog and put him out of his misery. Later on in the novel, Candy says that she should have shot the dog instead of making someone else do it. This little message plays a major role of foreshadowing for the murder of Lennie. The other most significant event of the novel is Lennie’s death. The way Lennie died was that he was shot and killed by his best friend george. Going back to when Candy said that she wished she had killed her dog, this is prime case of foreshadowing because it is the only reason why George killed Lennie because Curly was going to shoot him anyways. George did the right thing that he had to do, but also he did the one thing he didn’t want to do. There are also some differences between these two deaths. The most common difference is that Candy’s dog is an animal and Lennie is a human being. Research Papers on Of Mice and Men by John Steinbeck - Literature EssayThe Fifth HorsemanCapital PunishmentArguments for Physician-Assisted Suicide (PAS)Mind TravelQuebec and CanadaThe Masque of the Red Death Room meaningsEffects of Television Violence on ChildrenThe Spring and AutumnHip-Hop is ArtIncorporating Risk and Uncertainty Factor in Capital