Astonishing Strength Characteristics of Stone-Thrower-Wales Defects in Graphene under Compressive Load
G. Rajasekaran Rajesh Kumar and Avinash Parashar Department of Mechanical and Industrial Engineering Indian Institute of Technology, Roorkee - 247667, India
ABSTRACT: One atom-thick sheet of carbon discovered this century is flaunted not just for its electrical properties but also for its physical strength and flexibility. The bonds between carbon atoms are well known as the strongest in nature, so a perfect sheet of graphene should withstand just about anything, but to use it in real-time applications, we have to understand the useful strength of graphene. So for, researchers have looked extensively at graphene’s electronic properties and tensile strength, nobody, had taken comprehensive measurements of its ability to withstand a compressive load. We find that, counter to standard reasoning, graphene sheets with Stone-Thrower-Wales (STW) defects are able to bear high compressive stress as compared to pristine graphene. We show that this trend can be understood by considering the critical bonds in the seven and five-membered carbon rings which bears the maximum compressive stress. Graphene with STW defects is stronger in compressive strength point of view because they are able to better accommodate these strained rings. Our results provide guidelines for designing graphene with STW defects to obtain maximum compressive strength, so that we can get the benefit of this
On the off chance that you have rock or marble ledges or floors in your home, there will come a period when they will start to lose their brilliance and need rebuilding work done on the stone. Indeed, even these amazingly hard surfaces can get to be harmed, scratched, chipped, recolored, or simply get dull after some time. While you can clean the stone yourself with items accessible from your neighborhood tool shop, to truly restore the surfaces to look new once more, and to seal them for future security, it gets an expert stone temporary worker. Here are a few actualities you ought to think about stone contractual workers to chip away at your marble and rock.
In his fiction “Cutting for Stone”, Dr. Abraham Verghese presents a story of Marion and Shiva Stone, conjoined twins who are separated at birth by their presumed surgeon father, Dr. Thomas Stone. The twins were orphaned almost immediately after they were born. Their mother, Sister Mary Joseph Praise, an Indian nurse nun at Missing Hospital in Addis Ababa, Ethiopia, and Dr. Thomas Stone’s perfect surgical assistant, dies from uterine rupture during the childbirth. Their presumed father, being shocked by the catastrophic death of his loved one, leaves the twins to two of his colleagues, Dr. Kalpana Hemlatha and Dr. Ahbi Ghosh, who
If you were granted a wish what would it be? In the passage, “The Discontented Stonecutter” by Bayard Taylor was about a poor stonecutter who cut stone all day and he had small wages for the work he did. The stonecutter wished that he was the richest in the world. The stonecutter truly desired that he was rich and powerful and achieved it by greed, jealousy, and wishes. This passage will show a twist in the character, in which he changes from being discontented to contented.
In “Steel Axes for Stone-Age Australians,” Sharp discusses the importance and function of the stone axe in the traditional Yir Yoront culture in terms of technology, conduct, and belief. Sharp then analyzes how the introduction of the steel axe, through contact with various Europeans, has undermined the stone axe and has thus drastically affected the Yir Yoront culture. Ultimately, the author believes that the introduction and the success of the steel axe in this aboriginal culture has served as a destructive force and has resulted in the inevitable collapse of the traditional culture and in the construction of a new culture through the incorporation of certain European values.
Stone cutter, king in the shirt the lesson are for king of the shirt is to be happy what you have and not what u don't have.The first story teaches us that you should behalf what you have and you don't have cause not everything will not always make you happy. You don't everything to be happy.The next story is the stone cutter the lesson is to be yourself and don't try to be some else. The lesson in both story's is that be happy to be
“The First Stone” is written by Don Aker and this book is based on two teenagers who have suffered very painful past. They both have lost one of their loved ones in their past. The main character is Reef’s whose parents and grandparents die when he was young. He was left to many foster homes because of his past. He got anger issues since his parents and grandparents died. He made very inappropriate decision that leads him to court and then to North Hills. Now he has to respect other and follows the rules in order to stay away from jail. I believe Reef could have changed his past. By his action, behavior and language but since he didn’t help himself, he now has to face his
In Cutting for Stone Thomas Stone asks, “What treatment in an emergency is administrated by ear?” The correct answer is “Words of comfort.” Just this one statement encapsulates the books surprising take on medicine this question also reminds me of experiences I have had with doctors and hospitals. I will be discussing these topics along with how Cutting for Stone tells us about the roles of compassion, faith, and hop in medicine.
When I was younger I had a friend that would love to tell stories of the Aztec, or Mexica and although I don’t think she knew what she was talking about truly, I started a liking for their culture. Their culture is a very unique one that will be known for its practice of sacrificing humans, making of magnificent jewelry, and the making of their downfall by the Spaniards. The Broken Spears is a book that so well put together the accounts of the Mexica and the conquest of the Spaniards. Broken Spears was an interesting account that could be seen to have a little bias on the side of the Mexica. Many reasons could follow like the fact that it was written after the whole ordeal. Although Broken Spears seems to have a bias I claim that it does show how the culture collides well because the difference in the first encounter with its first judgement of each people to each other, the difference with the technologies and living, and the difference between the religions they both believed in.
Crooked Arrows Crooked Arrows is a 21st century film which embodies cultural resilience throughout the film. The team utilized culture, heritage, and longstanding traditional values to help overcome adversity and defeat poor self-esteem, to turn their lacrosse season around by going back to their roots. Within the film Crooked Arrows, it depicts a Native American prep school lacrosse team in New York, which struggle not only on the field but also off the field. The on the field struggle quite simply pertains to the fact that the players are simply undersized unlike the much larger prep school competition who always bowl them over each game of the regular season.
The article Why Muscles Don’t Break: New Research Offers Possibilities for MD Therapies explains in-depth the functions of the muscles in the human body. Throughout the article the author, Joana Fernandes, presents the extensive amount of research that she has performed regarding this insightful topic. She cites a study published in the Proceedings of the National Academy of Sciences, called “α-Actinin/titin interaction: A Dynamic and Mechanically Stable Cluster of Bonds in the Muscle Z-disk”. Essentially, the study explains that the reason muscles don’t break is due to the two binding proteins called a-actinin and titin. Fernandes utilizes evidence from the study to formulate her article and describe how these two proteins work together in unison to withstand a force of up to five piconewtons, “The experiment showed the bond between these two proteins is able to withstand a force of five piconewtons, a small force comparable to nearly one billionth the weight of a bar of chocolate” (Fernandes). As the article progresses, Fernandes analyzes how such small forces hold a muscle together for a lifetime and explains to the reader that this is possible because there is seven times more strands of a-actinin than titin.
You may not know a lot about wrestling but losing weight is one of the most major parts of the sport and there is no leeway when it comes to making weight, if you want to wrestle the 113 weight class then you have to weigh 113.0 or less or you can not wrestle that day. During the season I was able to hold my own in that weight class, my record was 11:12 which is not bad it’s just that I can do better. Even though a weight class might not seem like a lot but it is until you wrestle you will never understand of 6 or 7 lbs, the strength difference is dramatic. My coach during the season told me to drop to the 113 weight class, but I always found a reason not to lose the weight, but at the end of the season, I decided to man up and drop the weight.
A stone conservator is someone who tries to prevent and preserve the historic buildings and sculptures from damage. Stone conservator clean pollution deposits for sculptures, repair, and repainting. Many stone converters work at museums, universities, and private companies. Anyone who is a stone converter must have knowledge in art and chemistry and work together with both professions. There are many methods stone conservators use to clean the historic buildings and sculptures. One method they use is applying a thin, clay mudpack to a stones surface to pull out the deposits (Addison-Wesley; vol. 5; 877).
The author states about the three theories in which carved stone balls used for, and provides three reasons of support. However, the professor explains that the theories about the use of the carved stones were unconvincing, and refutes each of the author’s reasons.
The author of the issue states that Carve stone balls which were discovered in the numerous regions of Scotland had been utilized for special purposes and provides some reasons to support.
Graphene is a form of carbon which has recently been receiving a great deal of attention. Some have come to call it “the wonder material” due to its many extraordinary properties. Although isolated in 2004, graphene's properties had been calculated decades earlier. It consists of a single layer of carbon atoms arranged in a hexagonal lattice. A single sheet of graphene is stronger than steel and yet remains very flexible, retaining all of its properties despite being bent and unbent multiple times. It is able to sustain extremely high electric current densities, is impermeable to all gasses, has a thermal conductivity double that of diamond and a very high electron mobility at room temperature. It is also easily chemically functionalized,