...“Stress fractures—a prospective study amongst recruits” studied by Niranjan Dash and AS Kushwaha. This prospective study lasted over a period of five years during 2004–2009 where a total of eight-thousand five-hundred and seventy recruits were enrolled at the start of their training to find out the incidence and pattern of stress fractures (Dash 2012). A total of six hundred and four out of a total of eight-thousand five hundred and seventy recruits sustained SF during the study period. The majority of fractures occurred during basic training. This proves that the stress fractures occurred because of the strenuous activity the recruits were engaging in. Factors like urban residence, vegetarianism and those without prior history of physical activity were found to be associated with stress fractures. The tibia was the most common bone affected. With this study about stress fractures it has been learned that priority should be given to individuals with good sports and physical activity background during recruitment. Intensity of training should be gradually increased during first three months of training. The rehabilitation method for stress fractures during basic military training can be considered the same as the first study when observing young athletic women. Starting at the beginning level of an exercise program...
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...Advances in Metal Forming Research at the Center for Precision Forming - Industry/University Cooperation – T. Altan, P. Sartkulvanich, N. Kardes The Center for Precision Forming (CPF), The Ohio State University, Columbus, Ohio, USA Abstract The demand for application for lightweight materials such as Ultra/Advanced High Strength Steels (U/AHSS), aluminum alloys, magnesium alloys and boron steels in automotive industry is increasing to reduce vehicle weight and increase crash performance. The use of these relatively new materials requires advanced and reliable techniques to a) obtain data on material properties and flow stress, b) predicting springback and fracture in bending and flanging, c) selecting lubricants and die materials/coatings for stamping and forging and d) designing tools for blanking and shearing. In addition, designing the process and tooling for a) hot stamping of boron steels, b) warm forming of Al and Mg alloys, and c) optimizing the use of servo-drive presses require advanced Finite Element based simulation methods. CPF is conducting R&D in most of these topics and also in many hot and cold forging related topics. This paper gives an overview of this research and discusses how the research results are applied in cooperation with industry. Keywords: Metal Forming, Sheet metal, Forging, FEM 1 INTRODUCTION The Center for Precision Forming (CPF) has been established with funding from the National Science Foundation (NSF) and a number of companies (www.cpforming...
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...LIQUID METAL EMBRITTLEMENT (LME) RAGHAV MOHAN Graduate Student M.S in Technical Entrepreneurship and Management University of Rochester INTRODUCTION Liquid metal embrittlement (LME) is a phenomenon of practical importance, where certain ductile metals experience drastic loss in tensile ductility or undergo brittle fracture when tested in the presence of specific liquid metals. Generally, a tensile stress or a residual stress is needed to induce embrittlement. Many mechanisms were proposed to explain the phenomenological characteristics of LME. The significance of liquid metal embrittlement is revealed by the practical observation of several structures experiencing ductility losses and cracking during hot dip galvanizing or during subsequent fabrication. Liquid metal embrittlement effects can be observed even in solid state, when one of the metals is brought close to its melting point (e.g. cadmium-coated parts operating at high temperature). This phenomenon is known as solid metal embrittlement. OBSERVATIONS OF LME Mechanical structures are typically a space frame fabricated from parallel large diameter tubes, called chords, cross braced by smaller diameter perpendicular and diagonal tubes(e.g. sign bridge structures over freeway) .After welding, the structure is hot dip galvanized. The hot dip galvanizing process consists of submerging the structure in a bath of molten zinc. This leaves a relatively uniform zinc coating over the entire structure upon...
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...The importance of vision in sports is a subject that been maintaining people awareness for the past couple years .In fact, With the increasing of people playing sports as a recreactional activity or at a professional level it is becoming more relevant than ever to stress the type of eye injuries that can happen while practicing a sport and the best way to protect ourselves.Whether it’s basketball , football, baseball or any type of sports humans in general , are more exposed than ever to eye injuries . Along the same side, according to the book sport vision care for the enhancement of sports performance “ sports - related ocular injuries account for 33000 to 100000 of the estimated 2.4 million eye injuries that occur in the US annually”...
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...END OF TERM PAPER PROF. RUZIC HYDRAULIC FRACTURING AND THE EAGLE FORD SHALE Patricio Calles Almeida – UIN 651559726 Everyone knows that the urge to find an alternative to fossil fuels is one of the top priorities of technology researchers and scientists. We also know that the United States is becoming more and more dependable on foreign resources as the national ones are running low. However, fossil fuels are still the only cost-effective sources of them all. You could argue that hydroelectric and nuclear power are on the rise, but the first one does not produce large scale amounts of energy and the latter requires a huge initial investment with long waits until returns and profits; all the previous makes these sources not really convenient in developing countries, the ones that ironically need is the most. That’s why fossil fuel sources will continue to dominate the energy scene for the next decades, at least. In this context, I want to focus my paper on hydraulic fracturing, fracking. Actually, more specifically, the absolute focus will be to relate this modern method of oil and natural gas extraction with the Eagle Ford Shale, located in South Texas. Specifications and characteristics that make this shale so appealing for fracking will be a part of the following analysis. Overall, the shale is one that could be the biggest production center of oil and natural gas of the US and bring lots of economic benefits to the region. The objective of this paper is demonstrated...
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...Osteoporosis Research Paper Ericson Yabut Anatomy and Physiology 200A Dr. Edward Eivers 2/14/16 Introduction: Normal Physiology of the Bone It is important to know the fundamental aspects of the skeletal system and the normal anatomy and physiology of the bone tissue in the system to understand osteoporosis. The skeletal system of the human body is essential in many functions, such as supporting body structure, storing minerals and bone growth factors, and being used as leverage for skeletal muscle locomotion. The skeletal system used to be made of hyaline cartilage, but the cartilage eventually ossifies into bone tissue as the body continues to age develop into adulthood. Bone growth and development is strongly affected by...
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...Why Milk is the Best Drink at Starbucks Imraan Lilani Georgetown University Starbucks is an international café serving an extremely wide variety of hot and cold drinks, making the choice of a drink challenging. It is asserted that the ‘Venti skinny French Vanilla latte’ is the best drink served at Starbucks. However, I believe that milk is a superior beverage to all other drinks, using a number of different criteria, which include, adaptability, nutritional content, and cost. In addition, there is the emotional connection people have to their childhood when drinking milk. This paper will provide well-reasoned arguments detailing these criteria, which will demonstrate conclusively why milk is a better drink than a ‘venti skinny French Vanilla Latte’ and the best drink at Starbucks. Milk is an adaptable beverage which can be enjoyed hot or cold. During the Winter months milk can be heated up and can be a hot, soothing drink on a cold day. Conversely, in the Summer, milk can be enjoyed as a cold, refreshing beverage. As a result, milk can be adapted depending on the season and enjoyed throughout the year. This contrasts with the ‘venti skinny French Vanilla Latte’ that is only meant to be consumed as a hot drink therefore would not be as desirable on a humid, hot Summers day. Furthermore, milk is adaptable in terms of its fat content as it is possible to choose from 3 types of milk at Starbucks - full fat, 2%, or skim- ...
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...Rock Excavation Introduction The main purpose of this paper is to present rock excavation at an elementary level and provide key considerations and methods of removal when projects requiring rock excavation are encountered. The paper studies three aspects of rock excavation as it relates to building construction. First, rock-breaking processes are introduced and the most commonly used methods in building construction are identified. Second, the environmental impacts related to rock excavation are discussed to provide awareness of the various concerns contractors should consider when planning rock excavation operations. Third, cost implications and scheduling considerations associated with rock excavation are analyzed from an estimating perspective. As a supplement to the academic discussion, findings from an interview with General Excavation, Inc. are presented to provide an actual contractor’s perspective on the topics discussed throughout this paper. The following information will provide an understanding of rock excavation and the various considerations (i.e. cost, local regulations, safety, etc.) contractor’s should have in mind when estimating and planning projects that involve rock excavation. The Rock Breaking Process When determining the proper method for excavating rock there are a few things you should consider. Determine how much rock you anticipate needs excavating. Is the rock solid? Is the rock easily accessible, how far below grade? Do the aesthetics...
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...Luis Ayala Associate Professor of Petroleum and Natural Gas Engineering Associate Department Head for Graduate Education *Signatures are on file in the Graduate School ii ABSTRACT Three investigations of pore-scale single-phase and multiphase flow in fractured porous media and mixed-wet porous media are presented here. With an emphasis on validating and utilizing lattice Boltzmann models in conjunction with x-ray computed microtomography. The objective of the first study is to investigate fracture flow characteristics at the pore-scale, and evaluate the influence of the adjacent permeable matrix on the fracture’s permeability. We use X-ray computed microtomography to produce three-dimensional images of a fracture in a permeable medium. These images are processed and directly translated into lattices for single-phase lattice Boltzmann simulations. Three flow simulations are presented for the imaged volume, a simulation of the pore space, the fracture alone and the matrix...
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...potential to revolutionize the current applications (some of them are described in the essay) as well as creating new set of applications. In this paper, we review the background of the novel material, its comprehensive atomic structure and properties that has fascinated the scientific community since its discovery. We also cover the synthesis of the material, including different effective methods that was investigated from the year of discovery until the present day. Finally, we discuss possible challenges and future perspectives in this rapidly enhancing scientific area. Key words: Graphene; Graphene-based material; 2-dimensional (2D); monolayer; Carbon nanotubes; Dirac level; fullerene; nanostructure; graphene synthesis; graphene applications. Reference to this paper should be made as follows: Aldabergenov, M., Balbayeva, G., Mirassov, A., Yerkinova, A. & Torgayeva, T. (2013) ‘The analysis of Graphene Material’, Astana: Nazarbayev University. 1 Introduction With the time movement and generation flow, the science and engineering achievements expands and widens by creating, exploring and making innovations that is still able to amaze the wide majority of the world. One of such extraordinary explorations was done in 2004 in the field of material science, and is being studied intensively in the different research areas. The discovery is known as “Graphene”, which is a material that has unique and exceptional properties due which the science and...
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...Assignment 4, Part 1: Research Project Draft Submission Clarissa Ensley Instructor: Timothy P. Kelly CRJ 105: Crime & Criminal Behavior August 25, 2013 Elder abuse is a serious problem in this country and around the world. The National Center for Victims of Crime (2008) reports: “In the United States, there are presently about 39 million individuals over the age of 65; the U.S. Census Bureau projects that more than 62 million Americans will be 65 or older in 2025.” In a current report, the U. S. Census Bureau (2010) reports, “Between 2010 and 2050, the United States is projected to experience rapid growth in its older population. In 2050, the number of Americans aged 65 and older is projected to be 88.5 million, more than double its projected population of 40.2 million in 2010.” Harvey (2008) concurs, he advises that by the year 2030, persons over sixty-five will reach eighty-five million; eight million will be over the age of eighty-five. Harvey goes on to mention, “The minority elderly may face more serious problems than the white elderly because they are sometimes less able to advocate for themselves because of cultural, language, or education barriers.” This data suggests that as the population of elderly continues to grow, so will the possibility of incidents of abuse. In a domestic environment, abuse of the elderly comes at the hands of their caretakers; this is commonly a family member. Reports of elder abuse are often met with disbelief. People do not...
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...Christina Pickett Reflective Learning EDU-233022-01X December 3, 2014 Research Paper Trauma and Birth Healing from a traumatic birthing experiences could be achieved through reflection. A traumatic birth experience can be described differently by all demographics of women and cover a wide range of reasons for labeling the birth as traumatic. According to Katherine Stone of Postpartum Progress (1) One of the leading causes of post-partum post-traumatic stress disorder is when a women’s reflection of her birth includes some recollection of feeling as if either her life of that of her child was in danger. In some instances depending on if a mother was predisposed to depression or other mental illness, either by prior diagnosis or genetics this recollection of trauma may be very minor in comparison to another experience. We must be open minded when discussing something as a trauma, what might be considered traumatic to one person may have been no issue for another. Katherine Stone of Postpartum Progress describes this as “The actual experience, and how the mother feels about her experience, both matter.” Trauma is defined by Webster dictionary as “Any physical damage to the body causes by violence or accident or fracture etc.” as well as, ”an emotional wound or shock often having long lasting effect.” Synonyms: Psychic trauma. So how do we learn from a traumatic birth? First we must learn to ask the tough questions. We can’t be afraid to ask our healthcare providers...
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...As I begin to write this paper I realize that some people might be wondering “Aren’t there already women going to combat in Iraq and Afghanistan?” Well, the answer to that question was one of the driving forces behind wanting to write a paper on the subject. The short answer is “Yes”. The long answer is no, there have been no women who have gone to combat in a direct Combat Military Occupational Specialty in the history of the American Soldier. “Well how can the answer be both yes and no at the same time”? The answer comes in the forms of rules and regulations that once prohibited women from even training to take on the jobs that are considered the Combat Arms of the military. Sometimes non-military members don’t have the luxury of seeing how the military operates from the inside. The military is like a small microcosm of the world and the citizens that they protect. There is a specific job for every task, no matter how menial or prominent, that must be trained for before being allowed to officially have it as a job title. This is especially true when it comes to Combat Arms; these are jobs that will intentionally put the Soldier in the direct line of fire. The training is intense and grueling and requires a lot of very physical strength and stamina to complete the courses to become members of their ranks. Women are currently allowed to serve in Combat support roles, but the fight has been for women to be able to serve in combat positions such as Infantry, Field Artillery and...
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...Earthquake From Wikipedia, the free encyclopedia This article is about the natural seismic phenomenon. For other uses, see Earthquake (disambiguation). [pic] An earthquake (also known as a quake, tremor, temblor or seismic activity) is the result of a sudden release of energy in theEarth's crust that creates seismic waves. Earthquakes are measured with a seismometer; a device which also records is known as aseismograph. The moment magnitude (or the related and mostly obsolete Richter magnitude) of an earthquake is conventionally reported, with magnitude 3 or lower earthquakes being mostly imperceptible and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale. At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacing the ground. When a large earthquakeepicenter is located offshore, the seabed sometimes suffers sufficient displacement to cause a tsunami. The shaking in earthquakes can also trigger landslides and occasionally volcanic activity. In its most generic sense, the word earthquake is used to describe any seismic event — whether a natural phenomenon or an event caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by volcanic activity, landslides, mine blasts, and nuclear experiments. An earthquake's point of initial rupture is called its focus orhypocenter. The term epicenter refers to the point at...
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...Example Research Paper on Polymer Chemistry: Introduction Polymerization refers to a chemical reaction that results in bonding of two monomers to form a polymer (Tarle, 435). A polymer molecule is made up of hundreds, thousands, or even millions of atoms joined together to form a chain with an extended length at least an order of magnitude greater than its thickness (Peacock & Calhoun, 2006). Polymers have variations of molecular weight (length), branching, steric configuration, interconnections and chemical defects (Tarle, 435). A polymer is made up of many elements. One can consider a polymer as a thread with every link of this string forming a fundamental unit which is in turn made of hydrogen, carbon, silicon and oxygen(Tarle, 435). They are mostly made up of hydrocarbons though other elements such as Sulphur, nitrogen and chlorine may also be found(Carraher & Charles, 2). The molecules are held together by covalent bonds that are branched, linear, or networked to form the polymeric material (Carraher & Charles, 2). While most polymers have carbon as their backbone, others have silicon as the main element holding the polymer (Carraher & Charles, 2). . The history of polymerization The science of polymerisation began way back in the 19th century where alumina-silica glass and phosphoric acid was widely applied to fill dentures (Carraher & Charles, 2). . However, the compounds had very poor mechanical properties and high solubility. This meant that they...
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