Scientific principles and techniques Essay Example | Topics and Well Written Essays - 1500 words

Scientific principles and techniques - Essay Example Mechanics are based on a few laws of nature which are evident without proof or argument. Mechanics is a highly developed branch of physics which is tasked with the determination and description of the motion of bodies and the investigation of the forces that are associated with the motion (Gross, et al. 2009). Suspension system The suspension system of a car is a collection of important systems that are located on the lower part of the car and are part of the chassis. These include the frame, suspension system, steering system and tires and wheels. The suspension of a car is mainly composed of three systems namely springs, dampers and anti-sway bars. Springs are based on four designs: coil springs which are the most common and are made of a heavy-duty bar that is coiled around an axis. They compress and expand when a force is applied on them to absorb the motion of the wheels; leaf springs which are made up of several layers of metal that are bound together to perform as a single uni t. They absorb shock in trucks and heavy-duty automobiles to reduce the force exerted on the wheels; torsion bars which are made of a steel bar that is coiled; and air springs which are made up of a cylindrical chamber of air placed between the wheel and the body of the car. Manufacture The material is commonly used is alloys of steel such as high-carbon, chrome vanadium and stainless steel. The manufacture process of the springs involves coiling, hardening and a final stage of finishing. Leaf springs are made from bars of flat stock and are heated to elevated temperatures. They are then formed by the use of a machine or by hand. Car springs are made by hot winding which involves heating the metal to very high temperatures to make it formable. When red hot, the bar is then coiled around a mandrel until it acquires the required shape then it is quickly removed from the mandrel and dipped in oil to cool and harden it. To ensure the spring acquires the required strength it is heat trea ted appropriately. For the leaf springs, the flat ends are attained by grinding. The bar is mounted in a jig and is held against an abrasive wheel that is rotating until the required flatness is achieved. A coarse wheel is used first then a finer wheel is used to ensure a fine finish and a cooling lubricant is used to ensure a quality finish and to increase tool life. In a subsequent processes, the spring is exposed to bombardment with tiny steel balls that hammer the steel and make it smooth and this ensures that the steel can resist fatigue and cracking after years of use. The spring is then compressed fully in order to achieve the desired pitch and length and this process is sometimes repeated severally. The coating process which is aimed at preventing corrosion of the metal is the next step. The entire surface of the metal is either painted, dipped in liquid rubber or plated with another metal for example chromium or zinc though electroplating. The spring is then tested through various quality control checks to ensure it adheres to the standards. Function They support the weight, absorb and reduce shock and help to maintain contact by the tire on the road surface. 1. Statics. At rest the coil spring is extended with the only force acting on it being the weight of the car. The leaf spring is curved at rest or when no force is acting on it. 2. Strength of materials. The springs in a car are made of a strong heavy-duty bar that is made of steel. This

Homesite Report Research Paper Example | Topics and Well Written Essays - 750 words

Homesite Report - Research Paper Example e oceans; the destruction they leave in their wake is devastating as was witnessed during the Indian Ocean Tsunami in 2004 where 230000 people lost their lives and property worth billions of dollars lost and the Japanese tsunami that led to the destruction of nuclear power plants leading to loss of lives and severe environmental degradation (Nanto 15)  Ã‚  Additionally, active volcanoes pose a major threat to those who live near them, since the possibility of property being buried under volcanic ash is always real. Wildfires are a major threat since once they start, they are difficult to contain and they have often led to major losses as witnessed in the Greek forest fires in 2009 (Amiridis et al. 6)  The other natural disaster that is likely to affect residents adversely is drought, which reduces the value of property and increases the cost of living. To make the right decision about where to settle, one has to look at the likelihood of any of these happening.  Having consider ed all these factors, three cities were found to be the most suitable.  Ã‚   The 2012 United Nations world risk report listed Qatar as the safest country from natural disasters, out of 173 countries worldwide (ADW 4)  Doha is the capital city of Qatar, which is in the Middle East. The country is located in a geologic setting, which makes it less susceptible to earthquakes. It’s tectonically gentle and the country, being one of the biggest oil and gas producers in the world, has the financial muscle which it has used to install six earthquake sensors that further reduces the possibility of residents being caught unawares (USGS) Being in the desert and receiving very little rain throughout the year, the risk of flooding and landslides in Doha is virtually nonexistent. Due to its geologic setting, the country is also not susceptible to tsunamis. The vegetation in Qatar is quite sparse thus making it rather difficult to sustain wildfires. The country does not have active volcanoes, thus

The Impact Of Cell Phones: GPA

The Impact Of Cell Phones: GPA Cell phones adopted by young generation in recent year, have become global phenomena around the world. Thus, with the emergence of this technology almost everyone has tried to adopt these cell phones. We found in this research that cell phone usage had a negative impact on students GPA. Students using their cell phone during class, they also receiving and sending text messages during their class so they were able to pay less attention to lecture and thus it had negative impact on students performance. Key terms: Cell phones usage, Academic performance, GPA Introduction Commercialization of cellular phone technology has increased its use in recent years. In Pakistan total subscribers for cell phones till 12 September 2012 have reached to 120,513,430 (Pakistan Telecommunication Authority). The adoption of cell phones by young generation has been a global phenomenon in recent years. It has become an integral part of adolescents daily life and has become one of the most popular forms of communication. In todays world almost every student is having cell phone in their pocket, clipped to a belt, or hidden in a brief case or purse and knows perfect usage of it. As technology is growing every day at very fast rate, and is bringing positive and negative effects for society and so is with cell phone technology that has brought both positive and negative effects. It is commonly observed that these cell phones have also become status symbol for youth and they have indulged themselves in the competition of having best and most updated cell phone with maximum fe atures. Todays youth prefer cell phones more as compared to internet or any other social activity. Young people own cell phone and also want to upgrade it as soon as new model is launched in the market. Cell phones are that much involved in our life that the person who own cell phone is tend to be thought socially connected, independent, modern and in demand by the society. One of the most used applications of cell phones by our young generation is text messaging and these cellular network companies have also played a vital role in negatively affecting our young generation by introducing a number of packages for text messaging and calls also. Students of today are master in fastest text messaging and are seen text messaging while at home, at university, traveling ,in classroom and specially while studying. Communication with fellow students, professors, parents, and everyone else is just a click away. Most of the students use it for chatting with friends. This research paper explores the impact of cell phones` usage on students academic performance. We examined the effect of mobile usage on the grades among university students. Literature Review Cell phones and academic performance: The invention of cell phone has brought revolutionary change in the world. And thus bought change in the lifestyle of people using it including students. In 2005, the number of cell phone subscribers worldwide will reach 2 billion (Deloitte Research, 2005). And in Pakistan total fixed phone subscriber by December 2011 reached to only 3,098,117, less than mobile phone subscriber that were 120,151,253 till December 2011 (Pakistan Telecommunication Authority). Surveys have consistently shown that cell phone is used and loved more than television or internet by students, whether they are using internet or watching television they are having cell phone in their hands. Through common observation we also evaluated that students need to return to their home if they forget to take it with them. Thus with the emergence of this technology almost everyone has tried to adopt these cell phones and are addicted to its usage that they think their work done become difficult without its services and t hey are unable to stay connected with their friends and family. The main issue for teachers is the disturbance created in class room due to cell phone calls and texting. Combining this with the ease of hiding the device due to its small size, makes it very difficult for teachers to control it. Students are excited to find out that who has called and what the message is, young people are reluctant to turn off their cell phone during class time. Usually students kept their devices on during lectures with themselves and also sometimes forget to turn profile silent during class and its ringing create disturbance in class. Campbell (2006) found that students and faculty view the ringing of cell phone in class to be a serious problem. It is clear that if students spend time texting, they will not be able to pay attention to class lecture, will not be able to understand the topic and will not be able to produce good result in class, this will have impact on their grade points. Through common observation it is observed that today students are busy with this technology, spends 90% of their time with cell phones and dont pay attention to their studies. And if they pretend to their parents that they are studying in their room, they are actually dodging their parents, it is such a small device that they can easily hide them and lie with their parents. Students are trying to make as many friends whether girl or boy as they can, keeping themselves busy all day and night, as these network companies for their own profit have introduced a lots of cheap packages for call and messaging. All these activities in which students have engaged themselves in todays world are demolishing their present and future. After explaining negative aspect there are some positive impact also, it helps students to stay connected with their group members when assigned some group work from their teacher and can also contact their teachers in time of having any difficulty regarding their assignments. In school it also helps teacher to tell their parents about any serious problem happened to the students and also helps teacher to text their parent if they are absent from school. Students are supposed to use mobile phones whole night texting their friends. It is interesting to note that there are few common family rules about young peoples use of the cell phone. In fact, many adolescents (58%) reported that there were no rules set by their parents about their cell phone use and only 12% reported that their parents used removal of their cell phones from them as punishment (Metthews, 2004). Probably because of the sleeping issue it has been found that parents have to take cell phone from their children at night while going to sleep. Some reported that parents had to ask their children to stop using phone at night as then students are unable to wake up early in the morning for their university, school or college or they feel sleepy during class and do not pay proper attention. Along with academic performance cell phones have also positively and negatively affected social relationships. With the emergence of mobile phones individuals are able to stay connected with their friends, family and relatives living abroad. In addition to keeping up with social relationships, individuals have also been able to increase productivity with their work because they can be hundreds of miles away from the office, and still have instant access to their e-mail, documents and contacts wherever they are (Tully, 2003). A trend that is becoming more apparent is present absences; this is the concept of how an individuals presence in a social setting changes regardless of their physical presence, they are only half-present (Fortunati 2008). Individuals attending any meeting with their friends, coworkers, boss or any type of social activity, they leave that place during conversation as soon as their cell phone rings or vibrate. Even when sitting with their parents they do not hesit ate to go ahead and answer the call without thinking that this could hurt them. Through observation, researchers have found that individuals typically will not hesitate to interrupt an ongoing conversation to answer the ringing of their cell phone. Cell phones have given a new way to individuals to form new relationships and to strengthen existing ones. Teens admitted spending nearly an equal amount of time talking as they do texting each month. The feature is so important to them that if texting was no longer an option, 47 percent of teens say their social life would end or be worsened especially among females (54 percent compared to 40 percent of males) (CTIA Survey 2008). Before the emergence of mobile technology, individuals have regular interaction with one another. As they have very little telephonic contact with one another so they are used to visit each other homes regularly. Even if any one of the family member is in hospital, their loved ones even if out of city make a visit instantly or the next day but now with the emergence of cell phones people are supposed to just ask about their health on phone call with their cell phones. Cell phones also create a factor of safety among parents. Parents feel satisfied if their children are having cell phone with them while going outside as they can contact them whenever they want. Even in the time of emergency they can call them. Not only parents can contact their children in the time of difficulty but children can also contact them in emergencies. But children also sometime misuse this device by telling lie to their parents and doing whatever they want to do outside, as their parents are satisfied with their lie. On the other side this device along with disadvantages has helped children and parents both to stay in contact when outside their home. As everything in this world have advantages and disadvantages both and it is upon us how we utilize it. Hypothesis Cell phones` usage will have a negative effect on students` academic performance. Model Cell phone usage Academic performance Methodology The data was collected by distributing questionnaire to students of different universities in Pakistan with the ages ranging between eighteen and thirty. A sample size of 150 students was taken in which 65 respondents were male and 85 respondents were female. The survey consisted of 24 questions, including cell phone impacts on students academic performance and social relationship. Multiple choice questions were asked. The reliability of the instrument was calculated by using SPSS. The instrument was personally administered to the sample. Demographic information (e.g., age, gender, university, degree, GPA) was also collected. Results After successfully collecting the data through distributing questionnaires in different universities of Rawalpindi and Islamabad, we have inserted that data in SPSS software data sheet and run desired functions necessary to know that what impact does independent variable (cell phone usage ) have on dependent variable (students academic performance). We have evaluated students academic performance by considering their GPA. From the correlation results as shown in TABLE 1, we have find that cell phone usage is having negative impact on students GPA i.e. (r= -0.303, p

My Plan :: Personal Narrative Writing

My Plan "The progress of an artist is a continual self-sacrifice, a continual extinction of personality." ~ T.S. Eliot ~ Maps and life are two things I never really understood. Therefore, to map out my future life seems like even more of an enigma. I am more of a throw the map out the window, hope the truck doesn't break down and see where the road takes you kind of girl. However, I do know the general direction I am aiming for and a couple of stops I'd like to make along the way. So while the map of my upcoming life is not exactly drawn to scale, I can offer a rough draft of "spontaneously planned" sites and goals. The personal me wants to fly and to skydive. She wants to master the art of driving a manual vehicle uphill and then move on to motorcycles. By 2008 I will have seen my first opera and the original The Kiss painting by Gustav Klimt. And I will go to the art museums of every city I travel through and reside in. I will learn how to play the drums, regardless of the fact that I am a girl. I may also continue to sing, which, because I was a girl, became the childhood replacement for playing the drums. I learned how to coo, not pound, and I appreciate it but I still plan on pounding. I also hope to figure out my spiritual disturbance and become a consistent walker. Not only because I do not have a reliable vehicle but also because, why not? I'm young and healthy and people don't walk enough. I personally will revive walking. In terms of traveling I want to see it all. Not only because I believe that this will enhance my skills as a teacher but also because I know that this will always positively benefit my students. If I get to hear the bells that tolled for Hemingway I will have a better perspective on the literature and can cement the setting more strongly in students' minds, hopefully inspiring them to go see these places firsthand. In the United States, San Francisco, New Orleans, Savannah and New York City are at the top of my list. However, first I have my heart set on Italy, Spain and the Latin American countries. For clarification's sake I do not desire just to see these places but rather to live them.

Performance Management Plan Essay

Performance management plans are crucial to any business. The main focus of an effective performance management plan should be the employee, but in order to align employee performance with organizational goals, we must also look at the foundation of the organizational structure. This is important because it will define the direction in which a performance plan will guide an employee. Currently Clapton Commercial Construction is a successful business, operating out of Michigan. The expansion of an already thriving organizational climate should be fairly smooth, and with our guidance we will ensure that the appropriate considerations are accommodated, such expansion to a different state, Arizona, and adding of 20% more employees. After looking into your current performance management plan, I would like to make the following suggestions: Organizational goals When we compared your current organizational goals to your existing performance management plan, we saw that there were already successfully established tools for implementing training as well as measuring employee satisfaction, efficiency, and productivity. Training to the organizations desired result is imperative and being able to measure milestones along the path is just as important. Training Training a diverse group of employees creates the need for several different training modalities. Group trainings work well because it allows for information to be heard by the masses. The common downfall to this is that many individuals learn in different ways. So having varies approaches  ensures a higher success rate. Smaller focus groups work well to reach others on a more intimate level. The most important factor in training, other than the training itself, is the ability to measure the results of the productivity that the training has created. By-annual evaluations that evaluate key factors in the training help to place a quantitive value on not only production but also on behaviors. Documentation is important as well, because it records a standard that was set during strategic planning that evaluations should be measured against. Communication One of the key components of a truly effective performance management plan is communication. Establishing and maintaining this is critical because managers need to feel connected with their employees and vise versa. Feedback is a large part of our plan suggestion because it will assist in communicating the identified gaps in production. Currently your turnover rate is at 20%. Our goal with establishing better communication between management and employees is to see that percentage shrink. Feedback and coaching will has been proven to add to employee satisfaction (OPM.gov). Open communication allows for those within the organization to develop strong working relationships, which will result in a continuous flow of feedback and coaching. The 20% employee addition in this expansion is a great opportunity to incorporate more employee participation in the further development of the performance management plan. Involving employees in this process with not only create a sense of ownership i n the work that the employee puts out, but will also make it possible for employees to take responsibility for their own learning and development within the company. Conclusion In conclusion, I would like to that Clapton Commercial Construction for trusting Atwood and Allen to assist with our expertise in your endeavor to create a successful performance management plan. As you grow and begin implementing this plan, we will follow up with evaluations to identify skill gaps and formulate resolutions to rectify them accordingly. References WWW.OPM.GOV [performance management] 2015

Race and the Sociological Imagination Essay

For generations African Americans have been disadvantaged in America and effects of these injustices have made a lasting impression. Education is one of the leading problems in the black community. Though there have many reforms in education over the years, racial injustices still exist because no attention in placed on how legislature affects people of color. I was raised in a middle-class family of educators. My entire life I’ve been told to â€Å"stay in school, get an education, and work hard so that you can beat the system. † Recognizing the structural forces in my life has helped me understand my place in society. Being able to â€Å"understand everyday life, not through personal circumstances but through the broader historical forces that structure and direct it† (Desmond and Emirbayer 43) has really had an impact on me. My father was born in 1968, the year we consider then end of the civil rights movement. He went to Luscher Elementary during the 70s and at that time the school was integrated. He had mostly White teachers and schoolmates. He received a quality education because of the resources given to whites were now available to blacks. He chose to attend St. Augustine High school. The Archdiocese of New Orleans constructed St. Augustine High School with funds solicited from Catholics of the Archdiocese through the Youth Progress Program. The Archdiocese of New Orleans placed the school under the patronage of St. Augustine of Hippo, a preeminent Christian and scholar of Africa, and a Father of the Church. This was appropriate since from its inception the school was designated for the education of young men from Black Catholic families of New Orleans. St. Augustine High School led the way in battling segregation in New Orleans. The successful legal challenges mounted by the school resulted in the de-segregation of the high school athletics in the state of Louisiana. The famed Marching 100 was the first African-American high school band to march in the Rex parade on Mardi Gras Day. My grandfather and father attended St. Augustine High School and through the education they received along with athletic scholarships and financial aide they both went on to attend Loyola University. My position in society was shaped by my economic position, which was an effect of my grandfather and father’s educations. My grandfather was able to attend college but this was not true for his parents. Depending upon a persons situation social welfare programs can either enforce progression or plateau disadvantages. I was able to attend Isidore Newman School and I lived in an integrated neighborhood where resources such as schools, hospitals, parks and grocery stores were better than those in other parts of New Orleans. My integrated neighborhood provided me with a good education. Blacks in poor neighborhoods are inhibited from achieving the same education as whites because of zoning legislation, transportation and lack of funds. My family was able to establish themselves financially because of social welfare programs such as war bonds, Pell grants, and the integration of schools. My grandfather was able to own their own home and provide for our family. He had a career as a school administrator they paid well. He provided opportunities for his children to attend college and for his wife. Desmond and Emirbayer argue that , â€Å"If we hope to drive racial domination from the gates of our schools we must continue the work of confronting whiteness in the curriculum† (346). I understand that as finding ways to end institutional racism and raising awareness of ideologies that will end prejudices. Until I attended Loyola I had a naive impression of racial awareness. Personally, I believe education is the key to combating racism. We must education our peers on our cultures. We must explain that â€Å"colorblindness† in society is not what’s best. Only by embracing and recognizing each other differences we will be able to break the social bubbles we live in. I’ve gained a stronger sense of racial awareness through this course. I have the ability to challenge and change other people’s ideologies and understand my own. I know because of my social position have scholarships, financial aide and the values of hard work and education instilled in me by my parents and grandparents. I’m also aware that many people are not able to gain that same access. Because of my racial awareness there is so much more I want to find out about the contributing factors that led to my family’s social position in New Orleans. It is through my racial awareness I plan to beat the system.