2008 GSW Proceedings最新文献

{"title":"Energy Saving by Power Factor Correction: Application to Qatar Industries","authors":"H. Moghbelli, K. Ellithy, M. Alam, F. Kotkot","doi":"10.18260/1-2-620-38575","DOIUrl":"https://doi.org/10.18260/1-2-620-38575","url":null,"abstract":"Abstract The industrial power distribution networks of the State of Qatar would have inductive loads at low power factor. These distribution networks experience increase in power losses especially during the peak summer period. Low power factor is most commonly corrected by connecting shunt VAR compensation such as shunt capacitors bank at the desired location to perform the power factor correction. The power factor correction using shunt capacitors bank produce economic saving in capital expenditures through the reduction of power losses through the distribution network. This paper presents a practical case study of power factor correction for an 11 kV industrial distribution network in the State of Qatar. The network model has been developed using EDSA professional power system software. The energy after adding the shunt capacitors (i.e. after power factor correction) has been determined from the power flow solutions. The on-site measurements have been conducted and the measurements have been verified b...","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132144271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Integration of Hands-On Manufacturing Processes and Applications within Engineering Disciplines","authors":"George Gray","doi":"10.18260/1-2--5464","DOIUrl":"https://doi.org/10.18260/1-2--5464","url":null,"abstract":"This paper represents a follow up and or an extension of a previously released paper as presented in a recent regional ASSE conference. It will highlight specific instructional approaches, both in lecture and lab which are currently being implemented in a new manufacturing processes course being taught to mechanical engineering students at Texas Tech University. Current engineering graduates are highly knowledgeable within their specific academic disciplines regarding the application of finite element analysis and parametric solid modeling software in pursuit of prototyping and simulating theoretical product designs. However, it would appear that many engineering students are not receiving adequate exposure to the actual fundamental hands-on manufacturing processes, concepts and practices, thus resulting in the continuation of a knowledge gap between entry level engineering graduates and the production, fabrication and manufacturing processes being practiced by their industry employers. This gap ultimately leads to a greater learning curve for the newly hired engineers and a longer time span before their company can begin to see economic benefits from their productivity. By incorporating a more practiced based course related to actual manufacturing processes and applications, engineering students will recognize a direct link between their course work and the on-the-job tasks being performed within the engineering and manufacturing work environment. These processes will also enhance the student’s abilities to truly participate in the current “design for manufacturability” (DFM) processes that are currently in practice in today’s competitive global marketplace. Employers are not the only group interested in seeing more hands-on manufacturing processes being developed; students are also voicing their concerns. An increasing number of students are indicating a desire to have a stronger connection between what is being discussed in the classroom as theory and the actual application of those production/shop practices within a manufacturing environment. Today’s engineering graduates should possess a basic manufacturing knowledge base that would include fundamental practices associated with precision measurements, metalworking, machining, welding, and composites. This paper will attempt to define the need, outline specific methods for implementation and give examples of successful university programs along with current data being gathered from an ongoing course at Texas Tech.","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130103728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Engineering Interest and Skills in Community College Students through a Project Based MEMS Design Competition","authors":"T. Osborn, M. Pleil","doi":"10.18260/1-2-620-38533","DOIUrl":"https://doi.org/10.18260/1-2-620-38533","url":null,"abstract":"This paper will showcase an innovative approach to creating interest in microsystems engineering processing and design at the community college undergraduate level. This project based curriculum begins to address some of the economic competitiveness issues raised in the recent National Academy of Sciences report “Rising Above the Gathering Storm: Energizing and Employing America for a Brighter Economic Future,” and the National Academy of Engineering’s “Engineer of 2020.” Common points raised include the students’ lack of interest, motivation, knowledge and skills required to compete in the global economy. By leveraging the Sandia National Laboratories University Alliance and its MEMS Design competition, Central New Mexico Community College (CNM) has enabled undergraduate Manufacturing Technology MEMS (Micro Electromechanical Systems) students to compete with graduate and undergraduate engineering students across the nation from Universities including: Texas Tech, Oklahoma State, University of North Carolina, and the University of Illinois. The CNM design teams finished first or were runners up over the last three years resulting in many students realizing that they too were capable of pursuing an engineering career. Due to the high placement within the contest, all CNM designs have been fabricated at Sandia National Laboratories Micro Engineering Sciences Applications laboratory. These prototypes are now utilized at recruiting events for high school students as well as teacher workshops as MEMS student designed examples. The competition requires the students to productively work as a","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121962459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A TRNSYS Model of a Solar Thermal System with Thermal Storage and Absorption Cooling","authors":"Mario Ortiz, Professor Andrea Mammoli, P. Vorobief","doi":"10.18260/1-2-620-38580","DOIUrl":"https://doi.org/10.18260/1-2-620-38580","url":null,"abstract":"A combined flat plate and vacuum tube solar thermal array on the roof of the University of New Mexico Mechanical Engineering building is used to produce hot water. The hot water fires a lithium bromide absorption chiller in the summer and flows through heating coils in the winter, providing cooling and heating respectively. To overcome problems associated with intermittent insolation, an insulated concrete tank is used for hot thermal storage. Additional concrete tanks without insulation are used to store chilled water. These cold storage tanks are used as the primary chilled water source to meet the cooling load, while the absorption chiller provides additional cooling during peak load periods. The cold storage tanks are cooled by a district chiller at night when district chilled water demand and the cost of electricity are low. TRNSYS, a transient systems simulation program with a modular structure, is used to model and predict optimal operating conditions of the solar array working in combination with the thermal storage system, absorption chiller and cooling system. This research enhances engineering education for undergraduate and graduate students at the University of New Mexico. Also, key concepts from this research are translated into standards-based middle school science curriculum.","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115621991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Effect of Resistivity in Resistance Butt Welding of Wire Rods","authors":"K. C. Praveen, M. Srinivasan","doi":"10.18260/1-2-620-38579","DOIUrl":"https://doi.org/10.18260/1-2-620-38579","url":null,"abstract":"","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125267452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Role of Fluid Dynamics and Wall Mechanics in Atherosclerosis, Plaque Rupture, and Plaque Excavation in the Human Carotid Bifurcation","authors":"Scott T. Lovald, T. Khraishi, J. Heinrich, H. Yonas, Christophe Taylor","doi":"10.18260/1-2-620-38585","DOIUrl":"https://doi.org/10.18260/1-2-620-38585","url":null,"abstract":"Atherosclerosis affects millions of people worldwide and can lead to heart attack and stroke. The human carotid artery bifurcation is a critical site often affected by plaque and atherosclerotic formations. Over time, atherosclerosis can grow from mild to severe depending on both mechanical and biological responses in the artery wall. A computational fluid dynamics model of the human carotid bifurcation with fluid structure interaction has been created to explore the nature of atherogenesis, plaque excavation and plaque rupture. Artery geometry, plaque geometry and boundary conditions were based on magnetic resonance imaging scans and spectral Doppler ultrasound scans obtained from patients at the University of New Mexico Hospital. In the current study, results for fluid velocity and wall shear stress corroborate results of previous studies that the region of plaque stenosis is characterized by low flow velocities, reversed flow, strong secondary flows and low wall shear stress. Fluid structure interaction results of the model support theories that these regions are further characterized by high arterial wall strain. Doppler ultrasound scans nonlinear the measures of arterial wall pressure, wall shear stress, wall shear stress and the oscillatory shear index at different degrees of The of the CT of a the first of pertinent and to","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122499680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pre-College Preparation in Math, Science, and Engineering for K12 Children","authors":"Debra S. Johns","doi":"10.18260/1-2-620-38598","DOIUrl":"https://doi.org/10.18260/1-2-620-38598","url":null,"abstract":"The Pre-College Math and Science Academy at the University of New Mexico provides encouragement to underrepresented students in grades K-12, teaching them to be proficient in mathematics and science, preparing these students to enroll in and complete college with a science, math, engineering, or teaching degree and career. This program has been specifically designed to motivate personal development and excellence in scholastic performance of youth. The presenter will share information about the success of this program through its interdisciplinary projects, experiments, field trips and interaction with visiting scientist and educators.","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128375353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementing and Validating Analog and Digital Controllers","authors":"H. Vasquez, J. Kypuros, Roy Villanueva","doi":"10.18260/1-2-620-38532","DOIUrl":"https://doi.org/10.18260/1-2-620-38532","url":null,"abstract":"","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130631227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Targeted Recruitment of Disadvantaged Students: The Multiplier Effect of Senior Electrical Engineering Design Demonstrations","authors":"August Allo, C. Costello","doi":"10.18260/1-2-620-38594","DOIUrl":"https://doi.org/10.18260/1-2-620-38594","url":null,"abstract":"Although the importance of Electrical and Computer Engineering is recognized as one of the critical areas for producing technically competitive graduates, recruitment of students to this area presents a challenge. In part, this is due to the fact that Electrical and Computer Engineering is not part of the curriculum of many high schools; thus, students are not exposed to this field of study. Many high school students have misconceptions of engineering, a complete lack of understanding of “what it means to be an engineer”, and/or feel they are incapable of achieving such high aspirations. The University of Texas at San Antonio is the third largest Hispanic-serving institution in the U.S. One of the goals of the University is to recruit disadvantaged students and underrepresented minorities, especially those who are the first generation, to attain a degree in higher education. To this end, the authors, in collaboration with the College of Education and Human Development’s Academy for Teaching Excellence have created a bi-annual program of community outreach and recruitment. The focus of activity is the Electrical Engineering Senior Design Demonstrations held at the end of every spring and fall semester. The seniors prepare exhibits of their design to include working prototypes and poster presentations for the event.","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121677253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Teaching Finite Element Method, the controversy between the use of commercial software and the development of mathematical skills","authors":"Santiago Cruz-Bañuelos","doi":"10.18260/1-2-620-38531","DOIUrl":"https://doi.org/10.18260/1-2-620-38531","url":null,"abstract":"Finite Element Method (FEM) course is a good opportunity to develop superior skills in our students; the controversy today is the use of commercial software in order to develop “Computational mechanical skills” which allow to the students to be a very good users and designers. Instead the use of programming skills in order to build codes which solve specific problems. My idea of an adequate course in FEM includes first of all the mathematical foundations like differential equations, matrix algebra, etc. Then the development of the matrix expression for different kinds of elements which includes spring element, bar element, beam element and plate element. With this intention the students can understand the concept of element, assembly of the rigidity matrix, boundary conditions, etc; the evolution of the complexity of the problems can justify the use of the computer code in order to solve big problems. But, what’s going on with complex geometry? The needed of the special code to mesh a complex solid take us in the way to use a commercial one, the most important thing at this moment is the student “have the right to use a commercial software” because already he knows the mathematics secrets of the black box. Obviously the develop of the computer code involves the mathematical aspects such like the weak formulation of the differential equation, the solution of the integrals using numerical procedure. The discussion of this aspect must involve the opinion of the faculty and students in order to clarify the expectative of the curricular plan in which the finite element method is included.","PeriodicalId":315415,"journal":{"name":"2008 GSW Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125764470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}