This is another property which relates the fatigue to tensile property of any material. It can be defined as the ratio of the endurance limit (Se) to the ultimate strength (Su) of the material of any structure. The value of fatigue ratio ranges from 0.25 to 0.60. It’s value solely depends upon the type of the material.
Facture Theory
Fatigue failure can be divided in three parts i.e. Crack initiation, Crack propagation and Final rupture.
• Crack initiation
It is the most important and the most complex stage of fatigue fracture. There is an irreversible change in the metal caused by repetitive shear stresses which is the most significant factor in the initiation process. The initiation site of any fatigue fracture is very small. It is never more than two to five grains around the origin. At the location of stress concentration points, the number would depend on geometry, environment, stress, and strength conditions. If this stage can be seized than fracture phenomenon would not take place.
• Crack Propagation
It is the stage in which the micro cracks developed changes their direction ...
Advancements in technology have strived to make life easier for so many people. In most cases, the advancements have achieved its goal, but in the article “Is Google Making Us Stupid?” Nicholas Carr questions if the improvements in society have unintentionally hindered our thought process overall. Carr begins the article by providing personal instances when his concentration seemed to diminish due to the internet. He explains how he now loses interest when reading lengthy portions, his mind just can’t seem to remain connected to his readings. He then proceeds to talk about how today’s life is surrounded by the internet, and explains the pros and cons of it. The negative side of it is that his mind now wonders off when seeking information from
Nicholas Carr gives a sense of unbiased in his work when he writes, “I’ve been spending a lot of time online, searching and surfing and sometimes adding to the database of the internet. The web has been a godsend to me as a writer” (394). Though this statement it is clear that he sees both sides of the argument and by demonstrating this to the author he strategically is appealing to ethos and supporting his own argument. In hopes of building credibility, he begins to write, “Over the past few years I’ve had an uncomfortable sense that someone, or something, has been tinkering with my brain, remapping the neural circuitry, reprogramming the memory. My mind isn’t going ─ so far as I can tell—but it’s changing. I’m not thinking the way I used to think” (394). Granted that he writes this in the beginning of his essay he is trying to credit himself as a victim which helps him support his argument against the constant usage of the internet. Nicholas Carr is aware that without building credibility within his essay the audience will dismiss his points as uneducated and meaningless.
Muscle endurance is the ability to perform a lot of repetitions against a given resistance for a long period of time. The combination of strength and endurance results in muscle endurance. Muscle endurance is used in may sports such as rowing, swimming, cycling, distance running, field hockey and American football. Normally, an endurance muscle program involves lifting about 12-25 repetitions of moderate loads. In some cases, this is inadequate for many sports such as boxing, canoeing and x-cross skiing.
With the rise of technology and the staggering availability of information, the digital age has come about in full force, and will only grow from here. Any individual with an internet connection has a vast amount of knowledge at his fingertips. As long as one is online, he is mere clicks away from Wikipedia or Google, which allows him to find what he needs to know. Despite this, Nicholas Carr questions whether Google has a positive impact on the way people take in information. In his article “Is Google Making Us Stupid?” Carr explores the internet’s impact on the way people read. He argues that the availability of so much information has diminished the ability to concentrate on reading, referencing stories of literary types who no longer have the capacity to sit down and read a book, as well as his own personal experiences with this issue. The internet presents tons of data at once, and it is Carr’s assumption that our brains will slowly become wired to better receive this information.
Every day there is some new technological advancement making its way into the world in an attempt to make life easier for people. In the article, “Is Google Making Us Stupid?”, author Nicholas Carr explains his thoughts on how he believes the internet is running the risk of making people full of artificial knowledge. Carr begins by explaining how he feels that the web is causing his focus issues, how he can no longer be completely immersed in a book, and the reason why he gets fidgety while reading. He then goes on to talk about how his life is surrounded by the internet and how that is the blame for the issues he has towards not being able to stay connected to a text; but at the same time says how and why the web has been a ‘godsend’ because he is a writer. In an attempt to draw the reader in, Carr uses a great deal of rhetorical appeals. He compares the differences of the past and the present and how he feels how it has changed not only himself, but others as well and how they are able to comprehend and focus due to the growing nature of the web. While comparing this, he accumulated research from several credited writers who feel the same way he does about the effects of the web.
According to www.telegraph.co.uk, “[y]oung people aged between 16 and 24 spend more than 27 hours a week on the internet.” Certainly this much internet usage would have an effect on someone. What exactly is the effect of using the internet too much? Nicholas Carr’s article “Is Google Making Us Stupid?” argues that we are too reliant on the internet and it is making the us dim-witted and shortens our attention span. While Clive Thompson’s article “Smarter than You Think: How Technology Is Changing Our Minds for the Better” states that technology is not only a collection of knowledge, it also a method of sharing and recording our own knowledge. I fall between both Carr and Thompson. I agree with car on his points of us being too reliant on the internet but disagree when he states that it is making us less intelligent. Meanwhile, I also support Thompson’s statement that the internet allows us to assimilate vast amounts of knowledge but disagree with his opinion on how we should be reliant on
Sleeping while on duty hours can negatively affect that soldier, their battle buddies, and even their mission. It’s an act that can only do harm, whether that soldier be in an active warzone overseas, stationed at a base within the homeland, or even training. It takes discipline to stay awake when it is necessary to, and not being able to keep awake when necessary shows a lack of discipline and effort on that soldier’s part. As a result, that soldier ends up hurting themselves and everyone around them.
If only my local library could hold the vast quantity of information that my hand held smart phone does. Carr insinuates that Google (and the internet) is making us stupid. I say they are making us lazy. In “Is Google Making Us Stupid” by Nicholas Carr informatively states that with the advancement of technology, Google search engine, and the internet we are become more distracted—with all the different forms of flash media, the amount of hyper-links after hyper-link after hyper-links, and clickable adds-- in turn we are doing less critical reading by way of the internet as opposed to a printed book. Being able to glance over several articles in hour’s verses days looking through books; being able to jump from link to link in order to get the information you need, never looking at the same page twice has decrease out deep thinking and reading skills. Now days, all forms of reading, e.g. newspaper, magazine, etc. are small amount of reading to get the main idea of what’s going on and if you would like more information you will have to go to another page to do so. In the end, C...
"Welding Processes, Welding Faults, Defects & Discontinuities For NDT Technicians Part 3." Hera.org. Hera, n.d. Web. 15 Mar. 2014. .
He states how he used to spend hours reading, but his concentration started to drift after two or three pages. He backed up his theory with stories from others who say they’re experiencing the same thing. But they still await the long-term neurological and psychological experiments that will provide a definitive picture of how the internet affects cognition. After a brief history lesson, Carr starts to incorporate Google into the article. He tells us about Google’s history and their mission. Carr states how Google, and the internet itself, have a financial stake in collecting the crumbs of data we leave behind. Apparently these companies do not want us reading slowly or for leisure. Carr then ends the article by stating that we are turning into robots ourselves, and that we are relying on computers to mediate our understanding of the
The human brain is a well-oiled machine. It requires maintenance like any other mechanism. The brains ability to cognitively function is affected by many factors within a person’s surrounding environment. Cognitive abilities began to develop during the early stages of childhood. In newer generations, children have developed shorter tempers, awry cognitive abilities and bleak imaginations. Scientific researchers have labeled upcoming generations as nature deficient. Many scientists, researchers and naturalists blame the innovations in technology for keeping children glued to their video game controllers and game devices; however, they acknowledged that it would be a short-sighted research project if they were to ignore the advances in production
After applying the Charpy Impact Test, materials can either be classified as brittle or ductile, with brittle materials absorbing small amounts of
Lack of sleep affects us many different ways in our daily lives. Think of yourself as a battery, and you’re using all the energy. After you 're done using the energy, you have to charge it. Humans are just like batteries when it comes to sleep. We use all of our energy in the day time doing our daily activities. Like a battery, if you don’t rest or charge yourself up, you’re not going to function very well. It is necessary to have a satisfying amount of sleep. Lack of sleep will affect you in ways such as: mood swings, loss of focus, change in behavior, and difficulties in everyday tasks.
Sleep is a very important factor in the human function. Our body and brain is able to reset itself and rejuvenate while we sleep. When we do not get the required amount of sleep, we start to feel lethargic and foggy minded, because our mind and body wasn’t able to replenish itself. Sleep is imperative that an insignificant rest deficiency or lack of sleep can affect our ability to remember things; decisions and can affect our temperament. Chronic sleep deficiency can get the body to feel agitated and it could lead to serious health problems such as, heart problems, stress, acne, and obesity.
Everyday, there are workers who come home from their jobs with a high amount of health issues. Headaches, aching muscles, exhaustion, and many more health issues have workers wondering why this is happening. All of these symptoms can be linked to stress in the workplace. Job stress has become more of a problem than ever before. Numerous studies show that job stress is the major source of stress for American adults and that it has escalated progressively over the past few decades (“Workplace Stress,” 2004). Stress has become more common and costly in the workplace not only for the workers, but also the companies. What is considered stress in the workplace? Many companies everyday are dealing with issues related to stress in the workplace. For example, the Blackpool Fylde and Wyre NSH Trust Foundation Hospital noticed there were issues with stress when people began calling out sick. Their consultant for occupational health began to see a pattern of worker stress that might be the case. With stress being such a big issue in the workplace, are there ways a company can decrease the amount of stress?