WorldWideScience

Sample records for professor electrical engineering

  1. Yue Joseph Wang named Grant A. Dove Professor of Electrical and Computer Engineering

    OpenAIRE

    Owczarski, Mark

    2009-01-01

    Yue Joseph Wang, professor of electrical and computer engineering in the College of Engineering at Virginia Tech, has been named the Grant A. Dove Professor of Electrical and Computer Engineering by the Virginia Tech Board of Visitors.

  2. 7 March 2013 -Stanford University Professor N. McKeown FREng, Electrical Engineering and Computer Science and B. Leslie, Creative Labs visiting CERN Control Centre and the LHC tunnel with Director for Accelerators and Technology S. Myers.

    CERN Multimedia

    Anna Pantelia

    2013-01-01

    7 March 2013 -Stanford University Professor N. McKeown FREng, Electrical Engineering and Computer Science and B. Leslie, Creative Labs visiting CERN Control Centre and the LHC tunnel with Director for Accelerators and Technology S. Myers.

  3. Electrical engineer's reference book

    CERN Document Server

    Laughton, M A

    1985-01-01

    Electrical Engineer's Reference Book, Fourteenth Edition focuses on electrical engineering. The book first discusses units, mathematics, and physical quantities, including the international unit system, physical properties, and electricity. The text also looks at network and control systems analysis. The book examines materials used in electrical engineering. Topics include conducting materials, superconductors, silicon, insulating materials, electrical steels, and soft irons and relay steels. The text underscores electrical metrology and instrumentation, steam-generating plants, turbines

  4. Maury Nussbaum reappointed as Hal G. Prillaman Professor Fellow in Industrial and Systems Engineering

    OpenAIRE

    Owczarski, Mark

    2010-01-01

    Maury Nussbaum, professor of industrial and systems engineering in the College of Engineering at Virginia Tech, has been reappointed as the Hal G. Prillaman Professor Fellow in Industrial and Systems Engineering by the Virginia Tech Board of Visitors.

  5. Brian M. Kleiner receives Ralph H. Bogle Professor Fellowship in Industrial and Systems Engineering

    OpenAIRE

    Owczarski, Mark

    2010-01-01

    Brian M. Kleiner, professor of industrial and systems engineering in the College of Engineering at Virginia Tech, has been named the Ralph H. Bogle Professor Fellow in Industrial and Systems Engineering by the Virginia Tech Board of Visitors.

  6. Pragmatic electrical engineering fundamentals

    CERN Document Server

    Eccles, William

    2011-01-01

    Pragmatic Electrical Engineering: Fundamentals introduces the fundamentals of the energy-delivery part of electrical systems. It begins with a study of basic electrical circuits and then focuses on electrical power. Three-phase power systems, transformers, induction motors, and magnetics are the major topics.All of the material in the text is illustrated with completely-worked examples to guide the student to a better understanding of the topics. This short lecture book will be of use at any level of engineering, not just electrical. Its goal is to provide the practicing engineer with a practi

  7. Practical electrical engineering

    CERN Document Server

    N Makarov, Sergey; Bitar, Stephen J

    2016-01-01

    This textbook provides comprehensive, in-depth coverage of the fundamental concepts of electrical and computer engineering. It is written from an engineering perspective, with special emphasis on circuit functionality and applications. Reliance on higher-level mathematics and physics, or theoretical proofs has been intentionally limited in order to prioritize the practical aspects of electrical engineering. This text is therefore suitable for a number of introductory circuit courses for other majors such as robotics, mechanical, biomedical, aerospace, civil, architecture, petroleum, and industrial engineering. The authors’ primary goal is to teach the aspiring engineering student all fundamental tools needed to understand, analyze and design a wide range of practical circuits and systems. Their secondary goal is to provide a comprehensive reference, for both major and non-major students as well as practicing engineers. Provides a self-contained, fundamental textbook on electric circuits and basic electronic...

  8. Electric power substations engineering

    CERN Document Server

    McDonald, John D

    2012-01-01

    The use of electric power substations in generation, transmission, and distribution remains one of the most challenging and exciting areas of electric power engineering. Recent technological developments have had a tremendous impact on all aspects of substation design and operation. With 80% of its chapters completely revised and two brand-new chapters on energy storage and Smart Grids, Electric Power Substations Engineering, Third Edition provides an extensive updated overview of substations, serving as a reference and guide for both industry and academia. Contributors have written each chapt

  9. Electrical engineer's reference book

    CERN Document Server

    Jones, G R

    2013-01-01

    A long established reference book: radical revision for the fifteenth edition includes complete rearrangement to take in chapters on new topics and regroup the subjects covered for easy access to information.The Electrical Engineer's Reference Book, first published in 1945, maintains its original aims: to reflect the state of the art in electrical science and technology and cater for the needs of practising engineers. Most chapters have been revised and many augmented so as to deal properly with both fundamental developments and new technology and applications that have come to the fore since

  10. Electrical power cable engineering

    CERN Document Server

    Thue, William A

    2011-01-01

    Fully updated, Electrical Power Cable Engineering, Third Edition again concentrates on the remarkably complex design, application, and preparation methods required to terminate and splice cables. This latest addition to the CRC Press Power Engineering series covers cutting-edge methods for design, manufacture, installation, operation, and maintenance of reliable power cable systems. It is based largely on feedback from experienced university lecturers who have taught courses on these very concepts.The book emphasizes methods to optimize vital design and installation of power cables used in the

  11. Electric power substations engineering

    CERN Document Server

    2003-01-01

    This book covers all aspects of substations, from the initial concept to design, automation, operation, and physical and cyber security. Written by members of the Institute of Electrical and Electronic Engineers (IEEE) Power Engineering Society (PES) Substations Committee, each section provides a tutorial and includes references for further reading and study. The authors use photographs and graphics to help the reader understand the material. Exploring the most recent technological developments regarding industry practice and standards, the book provides an extensive overview of substations th

  12. The electric power engineering handbook electric power transformer engineering

    CERN Document Server

    Harlow, James H

    2012-01-01

    Electric Power Transformer Engineering, Third Edition expounds the latest information and developments to engineers who are familiar with basic principles and applications, perhaps including a hands-on working knowledge of power transformers. Targeting all from the merely curious to seasoned professionals and acknowledged experts, its content is structured to enable readers to easily access essential material in order to appreciate the many facets of an electric power transformer.Topically structured in three parts, the book: * Illustrates for electrical engineers the relevant theories and pri

  13. Electromagnetic foundations of electrical engineering

    CERN Document Server

    Faria, J A Brandao

    2008-01-01

    The applications of electromagnetic phenomena within electrical engineering have been evolving and progressing at a fast pace. In contrast, the underlying principles have been stable for a long time and are not expected to undergo any changes. It is these electromagnetic field fundamentals that are the subject of discussion in this book with an emphasis on basic principles, concepts and governing laws that apply across the electrical engineering discipline. Electromagnetic Foundations of Electrical Engineering begins with an explanation of Maxwell's equations, from which the fundament

  14. Virtual learning engine for electrical engineering education

    Science.gov (United States)

    Lord, Robert; Chapman, Brian

    1999-09-01

    Making the conceptual change from electricity as electrons moving in wires under the influence of voltage to electromagnetic energy embracing light and radio waves, using a mathematical learning sequence, has proven to be difficult for learners over the years. A `virtual learning engine' has been created to help begin this conceptual change in students' understanding of electricity by supporting the mathematical sequence with interactive action learning exercises and real world experimental observations. Development of the `virtual learning engine' is informed by current educational research and motivated primarily by the thrust into online education. Extensive consideration and assessment of learner desires led to clear goals and objectives providing a rigid framework for the `virtual learning engine' development. However, a flexible specification enabled creative input from both the academic and the software engineer. The result is an educationally sound flexible learning resource suitable for use by on- campus and off-campus students.

  15. ELECTRICAL TECHNIQUES FOR ENGINEERING APPLICATIONS.

    Science.gov (United States)

    Bisdorf, Robert J.

    1985-01-01

    Surface electrical geophysical methods have been used in such engineering applications as locating and delineating shallow gravel deposits, depth to bedrock, faults, clay zones, and other geological phenomena. Other engineering applications include determining water quality, tracing ground water contaminant plumes and locating dam seepages. Various methods and electrode arrays are employed to solve particular geological problems. The sensitivity of a particular method or electrode array depends upon the physics on which the method is based, the array geometry, the electrical contrast between the target and host materials, and the depth to the target. Each of the available electrical methods has its own particular advantages and applications which the paper discusses.

  16. Electrical engineering a pocket reference

    CERN Document Server

    Schmidt-Walter, Heinz

    2007-01-01

    This essential reference offers you a well-organized resource for accessing the basic electrical engineering knowledge you need for your work. Whether you're an experienced engineer who appreciates an occasional refresher in key areas, or a student preparing to enter the field, Electrical Engineering: A Pocket Reference provides quick and easy access to fundamental principles and their applications. You also find an extensive collection of time-saving equations that help simplify your daily projects.Supported with more than 500 diagrams and figures, 60 tables, and an extensive index, this uniq

  17. Teaching optical engineering to electrical engineering undergraduates

    Science.gov (United States)

    Boreman, Glenn D.

    1997-12-01

    We describe a one-semester undergraduate course in optical engineering that has been taught at University of Central Florida since 1985 to junior and senior students of electrical engineering. The choice of topics emphasizes first-order system-engineering calculations, rather than the more traditional theoretical viewpoint often found in junior/senior-level optics courses. Representative topics include: paraxial raytracing, field of view and F/#, diffraction-limited resolution, Fresnel equations, radiometric/photometric units, paraxial flux transfer, blackbody radiation, detector responsivity and sensitivity, shot noise, Johnson noise, and laser-beam propagation. Homework problems emphasize estimation of magnitudes, as well as more exact numerical calculations. We have found this approach to be accessible to typical engineering undergraduates, and to be a good foundation for entry-level practitioners.

  18. Program For Engineering Electrical Connections

    Science.gov (United States)

    Billitti, Joseph W.

    1990-01-01

    DFACS is interactive multiuser computer-aided-engineering software tool for system-level electrical integration and cabling engineering. Purpose of program to provide engineering community with centralized data base for putting in and gaining access to data on functional definition of system, details of end-circuit pinouts in systems and subsystems, and data on wiring harnesses. Objective, to provide instantaneous single point of interchange of information, thus avoiding error-prone, time-consuming, and costly shuttling of data along multiple paths. Designed to operate on DEC VAX mini or micro computer using Version 5.0/03 of INGRES.

  19. Transmission and distribution electrical engineering

    CERN Document Server

    Bayliss, Colin

    2003-01-01

    This comprehensive treatment of the theory and practice encountered in the installation and design of transmission and distribution systems for electrical power has been updated and revised to provide the project engineer with all the latest, relevant information to design and specify the correct system for a particular application.Thoroughly updated and revised to include latest developmentsLearn from and Author with extensive experience in managing international projectsFind out the reasoning and implicatons behind the different specifications and methods

  20. First VBI Fellows Accepted From Virginia Tech's College Of Engineering

    OpenAIRE

    Call, Neysa

    2003-01-01

    The Virginia Bioinformatics Institute (VBI) at Virginia Tech has awarded fellowships to four faculty in the College of Engineering--professor Peter Athanas, associate professor Amy Bell and assistant professor Mark Jones of electrical and computer engineering; and associate professor Joe Wang of aerospace and ocean engineering.

  1. Pragmatic electrical engineering systems and instruments

    CERN Document Server

    Eccles, William

    2011-01-01

    Pragmatic Electrical Engineering: Systems and Instruments is about some of the non-energy parts of electrical systems, the parts that control things and measure physical parameters. The primary topics are control systems and their characterization, instrumentation, signals, and electromagnetic compatibility. This text features a large number of completely worked examples to aid the reader in understanding how the various principles fit together.While electric engineers may find this material useful as a review, engineers in other fields can use this short lecture text as a modest introduction

  2. Teaching Mathematics to Electrical Engineering Students by Electrical Engineering Staff in College of Technology in Japan

    Directory of Open Access Journals (Sweden)

    Akira Fujimoto

    2013-12-01

    Full Text Available Electrical engineering staff (reorganized to Electrical and Computer engineering in 2004 has taught electrical engineering students for mathematics classes in Wakayama National College of Technology (WNCT in Japan from 2007. Effects of the mathematics classes by the electrical engineering staff were evaluated by using the results of the mathematics placement tests. The results of the tests are compared with averages of other National Colleges of Technology in Japan and other divisions of WNCT. As a result, an ability of electrical engineering students for mathematics improved dramatically with increasing the ratio of mathematics classes by the electrical engineering staff. It should seem that these good results were achieved by eagerness and strong motivation of the staff with electrical specialty for improving the ability of their division's students. The reasons for the improvement are discussed and the unique class of mathematics for college of technology is also introduced.

  3. Drastic reformation of Electrical and Electronics Engineering Laboratory(Researches)

    OpenAIRE

    青柳, 稔; Minoru, Aoyagi

    2016-01-01

    The Department of Electrical and Electronic Engineering opened in 1978, as the Department of Electrical Engineering. In 1987, the Department of Electrical Engineering was renamed the Department of Electrical and Electronic Engineering. The Department of Electrical and Electronic Engineering has conducted basic educations and studies on electric and electronic engineering. In this paper, I will introduce an overview of recent researches and educations of the Department of Ele ctrical and Elect...

  4. 46 CFR 188.25-1 - Electrical engineering details.

    Science.gov (United States)

    2010-10-01

    ... GENERAL PROVISIONS General Electrical Engineering Requirements § 188.25-1 Electrical engineering details. (a) The electrical engineering details shall be in accordance with subchapter J (Electrical... 46 Shipping 7 2010-10-01 2010-10-01 false Electrical engineering details. 188.25-1 Section 188.25...

  5. Soumitro Banerjee Department of Electrical Engineering Indian ...

    Indian Academy of Sciences (India)

    QUALITATIVE CHANGES IN DYNAMICAL STATUS. THEORY AND OPEN PROBLEMS. Soumitro Banerjee. Department of Electrical Engineering. Indian Institute of Technology. Kharagpur — 721302, India. QUALITATIVE CHANGES IN DYNAMICAL STATUS... 1 ...

  6. Statistical Techniques in Electrical and Computer Engineering

    Indian Academy of Sciences (India)

    Stochastic models and statistical inference from them have been popular methodologies in a variety of engineering disciplines, notably in electrical and computer engineering. Recent years have seen explosive growth in this area, driven by technological imperatives. These now go well beyond their traditional domain of ...

  7. The fundamentals of electrical engineering for mechatronics

    CERN Document Server

    Hüning, Felix

    2014-01-01

    This book covers the basic principles of electrical engineering. The depth of content and presentation is intended for students in the field of mechatronics, especially those with a background in mechanics or mechanical engineering. In addition to theoretical sections and practical applications, the textbook offers numerous practice exercises to apply and deepen the student's learning.

  8. More-Electric Gas Turbine Engines

    Science.gov (United States)

    Kascak, Albert F.

    1997-01-01

    A new NASA Lewis Research Center and U.S. Army Research Laboratory (ARL) thrust, the more-electric commercial engine, is creating significant interest in industry. This engine would have an integral starter-generator on the gas generator shaft and would be fully supported by magnetic bearings. The NASA/Army emphasis is on a high-temperature magnetic bearing for future gas turbine engines. Magnetic bearings could increase the reliability and reduce the weight of such engines by eliminating the lubrication system. They could also increase the DN (diameter of the bearing times the rpm) limit on engine speed and allow active vibration cancellation systems to be used, resulting in a more efficient, more-electric engine.

  9. Electrical principles and technology for engineering

    CERN Document Server

    Bird, John

    1995-01-01

    The aim of this book is to introduce students to the basic electrical and electronic principles needed by technicians in fields such as electrical engineering, electronics and telecommunications. The emphasis is on the practical aspects of the subject, and the author has followed his usual successful formula, incorporating many worked examples and problems (answers supplied) into the learning process.Electrical Principles and Technology for Engineering is John Bird's core text for Further Education courses at BTEC levels N11 and N111 and Advanced GNVQ. It is also designed to provide a comprehe

  10. Sodium heat engine electrical feedthrough

    Science.gov (United States)

    Weber, N.

    1985-03-19

    A thermoelectric generator device which converts heat energy to electrical energy is disclosed. An alkali metal is used with a solid electrolyte and a hermetically sealed feedthrough structure. 4 figs.

  11. Dielectric materials for electrical engineering

    CERN Document Server

    Martinez-Vega, Juan

    2013-01-01

    Part 1 is particularly concerned with physical properties, electrical ageing and modeling with topics such as the physics of charged dielectric materials, conduction mechanisms, dielectric relaxation, space charge, electric ageing and life end models and dielectric experimental characterization. Part 2 concerns some applications specific to dielectric materials: insulating oils for transformers, electrorheological fluids, electrolytic capacitors, ionic membranes, photovoltaic conversion, dielectric thermal control coatings for geostationary satellites, plastics recycling and piezoelectric poly

  12. 46 CFR 90.25-1 - Electrical engineering details.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Electrical engineering details. 90.25-1 Section 90.25-1... PROVISIONS General Electrical Engineering Requirements § 90.25-1 Electrical engineering details. (a) All electrical engineering details and installations shall be designed and installed in accordance with...

  13. 46 CFR 70.25-1 - Electrical engineering details.

    Science.gov (United States)

    2010-10-01

    ... General Electrical Engineering Requirements § 70.25-1 Electrical engineering details. All electrical engineering details and installations shall be designed and installed in accordance with subchapter J... 46 Shipping 3 2010-10-01 2010-10-01 false Electrical engineering details. 70.25-1 Section 70.25-1...

  14. National Electrical Code in Power Engineering Course for Electrical Engineering Curriculum

    Science.gov (United States)

    Azizur, Rahman M. M.

    2011-01-01

    In order to ensure the safety of their inhabitants and properties, the residential, industrial and business installations require complying with NEC (national electrical code) for electrical systems. Electrical design engineers and technicians rely heavily on these very important design guidelines. However, these design guidelines are not formally…

  15. Boundary element methods for electrical engineers

    CERN Document Server

    POLJAK, D

    2005-01-01

    In the last couple of decades the Boundary Element Method (BEM) has become a well-established technique that is widely used for solving various problems in electrical engineering and electromagnetics. Although there are many excellent research papers published in the relevant literature that describe various BEM applications in electrical engineering and electromagnetics, there has been a lack of suitable textbooks and monographs on the subject. This book presents BEM in a simple fashion in order to help the beginner to understand the very basic principles of the method. It initially derives B

  16. Installation of electric generators on turbine engines

    Science.gov (United States)

    Demel, H. F.

    1983-01-01

    The installation of generators on turbine aircraft is discussed. Emphasis is placed on the use of the samarium cobalt generator. Potential advantages of an electric secondary power system at the engine level are listed. The integrated generator and the externally mounted generator are discussed. It is concluded that the integrated generator is best used in turbojet and low bypass ratio engines where there is no easy way of placing generators externally without influencing frontal areas.

  17. Quantum Mechanics for Electrical Engineers

    CERN Document Server

    Sullivan, Dennis M

    2011-01-01

    The main topic of this book is quantum mechanics, as the title indicates.  It specifically targets those topics within quantum mechanics that are needed to understand modern semiconductor theory.   It begins with the motivation for quantum mechanics and why classical physics fails when dealing with very small particles and small dimensions.  Two key features make this book different from others on quantum mechanics, even those usually intended for engineers:   First, after a brief introduction, much of the development is through Fourier theory, a topic that is at

  18. 46 CFR 91.25-30 - Electrical engineering equipment.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Electrical engineering equipment. 91.25-30 Section 91.25... INSPECTION AND CERTIFICATION Inspection for Certification § 91.25-30 Electrical engineering equipment. For inspection procedures of electrical engineering equipment and systems see subchapter J (Electrical...

  19. The Electrical Engineering Profession at NASA

    Science.gov (United States)

    Emerson, Dawn

    2004-01-01

    Presentation given at the opening ceremony of the Centre of Vocational Excellence in Birmingham, England on October 7, 2004. Presentation highlights examples of work performed by Electrical Engineers at the NASA Glenn Research Center and highlights the demographics of the NASA workforce. Presentation is intended to be inspirational in nature.

  20. Engineering

    National Research Council Canada - National Science Library

    Includes papers in the following fields: Aerospace Engineering, Agricultural Engineering, Chemical Engineering, Civil Engineering, Electrical Engineering, Environmental Engineering, Industrial Engineering, Materials Engineering, Mechanical...

  1. The electric power engineering handbook power systems

    CERN Document Server

    2012-01-01

    Power Systems, Third Edition (part of the five-volume set, The Electric Power Engineering Handbook) covers all aspects of power system protection, dynamics, stability, operation, and control. Under the editorial guidance of L.L. Grigsby, a respected and accomplished authority in power engineering, and section editors Andrew Hanson, Pritindra Chowdhuri, Gerry Sheble, and Mark Nelms, this carefully crafted reference includes substantial new and revised contributions from worldwide leaders in the field. This content provides convenient access to overviews and detailed information on a diverse arr

  2. 1st International Conference on Engineering and Applied Sciences Optimization : Dedicated to the Memory of Professor M.G. Karlaftis

    CERN Document Server

    Papadrakakis, Manolis; OPT-i

    2015-01-01

    The chapters which appear in this volume are selected studies presented at the First International Conference on Engineering and Applied Sciences Optimization (OPT-i), Kos, Greece, 4-6 June 2014,  and works written by friends, former colleagues and students of the late Professor M. G. Karlaftis; all in the area of optimization that he loved and published so much in himself. The subject areas represented here range from structural optimization, logistics, transportation, traffic and telecommunication networks to operational research, metaheuristics, multidisciplinary and multiphysics design optimization, etc.  This volume is dedicated to the life and the memory of Professor Matthew G. Karlaftis, who passed away a few hours before he was to give the opening speech at OPT-i. All contributions reflect the warmth and genuine friendship which he enjoyed from his associates and show how much his scientific contribution has been appreciated. He will be greatly missed and it is hoped that this volume will be receive...

  3. Advances in Electrical Engineering and Automation

    CERN Document Server

    Huang, Xiong

    2012-01-01

    EEA2011 is an integrated conference concentration its focus on Electrical Engineering and Automation. In the proceeding, you can learn much more knowledge about  Electrical Engineering and Automation of researchers from all around the world. The main role of the proceeding is to be used as an exchange pillar for researchers who are working in the mentioned fields. In order to meet the high quality of Springer, AISC series, the organization committee has made their efforts to do the following things. Firstly, poor quality paper has been refused after reviewing course by anonymous referee experts. Secondly, periodically review meetings have been held around the reviewers about five times for exchanging reviewing suggestions. Finally, the conference organizers had several preliminary sessions before the conference. Through efforts of different people and departments, the conference will be successful and fruitful.  

  4. 46 CFR 189.25-30 - Electrical engineering equipment.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Electrical engineering equipment. 189.25-30 Section 189... VESSELS INSPECTION AND CERTIFICATION Inspection for Certification § 189.25-30 Electrical engineering equipment. (a) For inspection procedures of Electrical Engineering equipment and systems, see Subchapter J...

  5. High voltage and electrical insulation engineering

    CERN Document Server

    Arora, Ravindra

    2011-01-01

    "The book is written for students as well as for teachers and researchers in the field of High Voltage and Insulation Engineering. It is based on the advance level courses conducted at TU Dresden, Germany and Indian Institute of Technology Kanpur, India. The book has a novel approach describing the fundamental concept of field dependent behavior of dielectrics subjected to high voltage. There is no other book in the field of high voltage engineering following this new approach in describing the behavior of dielectrics. The contents begin with the description of fundamental terminology in the subject of high voltage engineering. It is followed by the classification of electric fields and the techniques of field estimation. Performance of gaseous, liquid and solid dielectrics under different field conditions is described in the subsequent chapters. Separate chapters on vacuum as insulation and the lightning phenomenon are included"--

  6. Electrical Grounding - a Field for Geophysicists and Electrical Engineers Partnership

    Science.gov (United States)

    Freire, P. F.; Pane, E.; Guaraldo, N.

    2012-12-01

    , layered stratified or showing lateral variations, ranging down to several tens of kilometers deep, reaching the crust-mantle interface (typically with the order of 30-40 km). This work aims to analyze the constraints of the current soil models being used for grounding electrodes design, and suggests the need of a soil modeling methodology compatible with large grounding systems. Concerning the aspects related to soil modeling, electrical engineers need to get aware of geophysics resources, such as: - geophysical techniques for soil electrical resistivity prospection (down to about 15 kilometers deep); and - techniques for converting field measured data, from many different geophysical techniques, into adequate soil models for grounding grid simulation. It is also important to equalize the basic knowledge for the professionals that are working together for the specific purpose of soil modeling for electrical grounding studies. The authors have experienced the situation of electrical engineers working with geophysicists, but it was not clear for the latter the effective need of the electrical engineers, and for the engineers it was unknown the available geophysical resources, and also, what to do convert the large amount of soil resistivity data into a reliable soil model.

  7. Fundamentals of electric power engineering engineering from electromagnetics to power systems

    CERN Document Server

    Ceraolo, Massimo

    2014-01-01

    At the basis of many sectors of engineering, electrical engineering deals with electricity phenomena involved in the transfer of energy and power. Professionals requiring a refresher course in this interdisciplinary branch need look no further than Fundamentals of Electric Power Engineering, which imparts tools and trade tricks to remembering basic concepts and grasping new developments. Even established engineers must supplement their careers with an invigorated knowledge base, and this comprehensive resource helps non-electrical engineers amass power system information quickly.

  8. Situated mathematics teaching within electrical engineering courses

    Science.gov (United States)

    Hennig, Markus; Mertsching, Bärbel; Hilkenmeier, Frederic

    2015-11-01

    The initial phase of undergraduate engineering degree programmes often comprises courses requiring mathematical expertise which in some cases clearly exceeds school mathematics, but will be imparted only later in mathematics courses. In this article, an approach addressing this challenge by way of example within a fundamentals of electrical engineering course is presented. The concept focuses on gaining specific mathematical knowledge and competencies in the technical context of this course. For this purpose, a complementary blended learning scenario centring around a web-based learning platform and involving an adaptation of the course was developed. The concept particularly considers the heterogeneity of today's student groups and is discussed with regard to related approaches, didactical considerations, and technical implementation. For the interventions, the results of a questionnaire-based evaluation proving students' acceptance and positive influence on examination performance are presented.

  9. Photonics education development for electrical engineering students

    Science.gov (United States)

    Cao, Yang; Luo, Yuan; Liu, Yu; Hu, ZhangFang; Cai, Xuemei

    2017-08-01

    We describe the contents of an advanced undergraduate course on photonics at School of Electrical Engineering, Chongqing University of Posts and Telecommunications. The main goal of the course is to equip the student with the necessary theoretical and practical knowledge to participate in photonics-related industry and further graduate level study and research if they choose. The prerequisites include college-level physics and higher mathematics which a general engineering student has already had in his/her first and second year college study. Although applications of photonics are ubiquitous such as telecommunications, photonic computing, spectroscopy, military technology, and biophotonics etc. Telecommunication information system application is more emphasized in our course considering about the potential job chances for our students.

  10. Electrical engineering is an applied mathematics

    Science.gov (United States)

    Zainal, Yuda Bakti; Sambasri, Susanto; Widodo, Rohani Jahja

    2015-05-01

    This paper presents developments and applications of Electrical Engieering (EE) as an Applied Mathematic (AM). Several characteristics of EE can be linked to human behavior. EE can "think" in the sense that they can replace to some extent, human operation. It is a concept or principle that seems to fundamental in nature and not necessarily peculiar to engineering. EE theory can be discussed from four viewpoints as: an intellectual discipline within science and the philosophy of science, a part of engineering, with industrial applications and Social Systems (SS) of the present and the future. In global communication, developed countries and developing countries should build several attractive and sound symbiosis bridges, to prevent loss of universe balances. EE applications have social impacts not only in developed countries but also in developing countries.

  11. 78 FR 44899 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-07-25

    ... Electric Company (GE) GE90-110B1 and -115B turbofan engines. This proposed AD was prompted by multiple... This AD applies to General Electric Company (GE) GE90-110B1 and -115B turbofan engines with variable... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric...

  12. 78 FR 38195 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-06-26

    ...; AD 2013-10-52] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines...) Applicability General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with a transfer gearbox... are adopting a new airworthiness directive (AD) for all General Electric Company (GE) GE90-110B1 and...

  13. 78 FR 19628 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-04-02

    ... Electric Company (GE) GE90-76B, -85B, -90B, -94B, - 110B1, and -115B turbofan engines. This proposed AD was... AD applies to General Electric Company (GE): (1) GE90-76B, -85B, -90B, and -94B turbofan engines with... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric...

  14. 77 FR 3088 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2012-01-23

    ...-10] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal... directive (AD) for General Electric Company (GE) CF34-10E series turbofan engines. This AD was prompted by a... affected engines if wear is found on either the CVD support ring or the fan drive shaft. We are issuing...

  15. 2012 International Conference on Electrical and Electronics Engineering

    CERN Document Server

    Chen, Suting; Wei, Zhanming; Xia, Jingming

    2014-01-01

    Unifying Electrical Engineering and Electronics Engineering is based on the Proceedings of the 2012 International Conference on Electrical and Electronics Engineering (ICEE 2012). This book collects the peer reviewed papers presented at the conference. The aim of the conference is to unify the two areas of Electrical and Electronics Engineering. The book examines trends and techniques in the field as well as theories and applications. The editors have chosen to include the following topics; biotechnology, power engineering, superconductivity circuits, antennas technology, system architectures and telecommunication.

  16. Integrated engine-generator concept for aircraft electric secondary power

    Science.gov (United States)

    Secunde, R. R.; Macosko, R. P.; Repas, D. S.

    1972-01-01

    The integrated engine-generator concept of locating an electric generator inside an aircraft turbojet or turbofan engine concentric with, and driven by, one of the main engine shafts is discussed. When properly rated, the generator can serve as an engine starter as well as a generator of electric power. The electric power conversion equipment and generator controls are conveniently located in the aircraft. Preliminary layouts of generators in a large engine together with their physical sizes and weights indicate that this concept is a technically feasible approach to aircraft secondary power.

  17. Electrical, Information Engineering and Mechatronics 2011 : Proceedings of the 2011 International Conference on Electrical, Information Engineering and Mechatronics

    CERN Document Server

    Wang, Fuzhong; Zhong, Shaobo

    2012-01-01

    As future generation electrical, information engineering and mechatronics become specialized and fragmented, it is easy to lose sight of the fact that many topics in these areas have common threads and, because of this, advances in one discipline may be transmitted to others. The 2011 International Conference on Electrical, Information Engineering and Mechatronics (EIEM 2011) is the first conference that attempts to follow the above idea of hybridization in electrical, information engineering, mechatronics and applications. This Proceedings of the 2011 International Conference on Electrical, Information Engineering and Mechatronics provides a forum for engineers and scientists to address the most innovative research and development including technical challenges and social, legal, political, and economic issues, and to present and discuss their ideas, results, works in progress and experience on all aspects of electrical, information engineering, mechatronics and applications. Engineers and scientists in acad...

  18. 78 FR 76045 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-12-16

    ... General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with high pressure compressor (HPC...-30-AD; Amendment 39-17694; AD 2013-24-17] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request...

  19. 78 FR 47534 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-08-06

    ... General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with affected transfer gearbox...-17-AD; Amendment 39-17536; AD 2013-15-20] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request...

  20. 78 FR 50320 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-08-19

    ...) Applicability This AD applies to all General Electric Company (GE) model GEnx- 2B67B turbofan engines with...-08-AD; Amendment 39-17553; AD 2013-16-15] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY...

  1. 78 FR 56594 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-09-13

    ... General Electric Company (GE): (1) GE90-76B, -85B, -90B, and -94B turbofan engines with stage 1 high...-11-AD; Amendment 39-17571; AD 2013-17-07] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY...

  2. 77 FR 76977 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2012-12-31

    ... Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Supplemental... proposed airworthiness directive (AD) for certain General Electric Company (GE) CF6-80C2 series turbofan engines. That NPRM proposed to supersede an AD that required replacement of fuel tubes connected to the...

  3. 78 FR 21578 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-04-11

    ... Electric Company (GE) model GEnx- 2B67 and GEnx-2B67B turbofan engines with booster anti-ice (BAI) air duct... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed...

  4. 77 FR 48110 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2012-08-13

    ... certain General Electric Company (GE) CF6-80C2 series turbofan engines. The existing AD requires... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed...

  5. 78 FR 72567 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-12-03

    ... General Electric Company (GE) GE90-110B1 and -115B turbofan engines with variable bypass valve (VBV...-20-AD; Amendment 39-17673; AD 2013-23-18] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY...

  6. 78 FR 47235 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-08-05

    ... Electric Company (GE) model GEnx-2B67 and GEnx-2B67B turbofan engines. This proposed AD was prompted by the... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed...

  7. Mathematical Modeling of Hybrid Electrical Engineering Systems

    Directory of Open Access Journals (Sweden)

    A. A. Lobaty

    2016-01-01

    Full Text Available A large class of systems that have found application in various industries and households, electrified transportation facilities and energy sector has been classified as electrical engineering systems. Their characteristic feature is a combination of continuous and discontinuous modes of operation, which is reflected in the appearance of a relatively new term “hybrid systems”. A wide class of hybrid systems is pulsed DC converters operating in a pulse width modulation, which are non-linear systems with variable structure. Using various methods for linearization it is possible to obtain linear mathematical models that rather accurately simulate behavior of such systems. However, the presence in the mathematical models of exponential nonlinearities creates considerable difficulties in the implementation of digital hardware. The solution can be found while using an approximation of exponential functions by polynomials of the first order, that, however, violates the rigor accordance of the analytical model with characteristics of a real object. There are two practical approaches to synthesize algorithms for control of hybrid systems. The first approach is based on the representation of the whole system by a discrete model which is described by difference equations that makes it possible to synthesize discrete algorithms. The second approach is based on description of the system by differential equations. The equations describe synthesis of continuous algorithms and their further implementation in a digital computer included in the control loop system. The paper considers modeling of a hybrid electrical engineering system using differential equations. Neglecting the pulse duration, it has been proposed to describe behavior of vector components in phase coordinates of the hybrid system by stochastic differential equations containing generally non-linear differentiable random functions. A stochastic vector-matrix equation describing dynamics of the

  8. The electric power engineering handbook electric power generation, transmission, and distribution

    CERN Document Server

    Grigsby, Leonard L

    2012-01-01

    Featuring contributions from worldwide leaders in the field, the carefully crafted Electric Power Generation, Transmission, and Distribution, Third Edition (part of the five-volume set, The Electric Power Engineering Handbook) provides convenient access to detailed information on a diverse array of power engineering topics. Updates to nearly every chapter keep this book at the forefront of developments in modern power systems, reflecting international standards, practices, and technologies. Topics covered include: * Electric Power Generation: Nonconventional Methods * Electric Power Generation

  9. Nonlinear optimization in electrical engineering with applications in Matlab

    CERN Document Server

    Bakr, Mohamed

    2013-01-01

    Nonlinear Optimization in Electrical Engineering with Applications in MATLAB® provides an introductory course on nonlinear optimization in electrical engineering, with a focus on applications such as the design of electric, microwave, and photonic circuits, wireless communications, and digital filter design. Basic concepts are introduced using a step-by-step approach and illustrated with MATLAB® codes that the reader can use and adapt. Topics covered include: classical optimization methods; one dimensional optimization; unconstrained and constrained optimization; global optimization; space map

  10. Measuring Technology and Mechatronics Automation in Electrical Engineering

    CERN Document Server

    2012-01-01

    Measuring Technology and Mechatronics Automation in Electrical Engineering includes select presentations on measuring technology and mechatronics automation related to electrical engineering, originally presented during the International Conference on Measuring Technology and Mechanatronics Automation (ICMTMA2012). This Fourth ICMTMA, held at Sanya, China, offered a prestigious, international forum for scientists, engineers, and educators to present the state of the art of measuring technology and mechatronics automation research.

  11. Online-BSEE (Online Bachelor of Science in Electrical Engineering): An Asynchronous Online Electrical Engineering Degree Program with Laboratory

    Science.gov (United States)

    Tang, Wendy; Westgate, Charles; Liu, Pao-Lo; Gouzman, Michael

    2014-01-01

    The Online Bachelor of Science in Electrical Engineering is a collaborative effort among three University Centers at SUNY (State University of New York), namely Stony Brook, Binghamton, and Buffalo. The program delivers the complete electrical engineering curriculum at the bachelor level to students online and asynchronously. Students, however,…

  12. Work Sampling Study of an Engineering Professor during a Regular Contract Period

    Science.gov (United States)

    Brink, Jan; McDonald, Dale B.

    2015-01-01

    Work sampling is a technique that has been employed in industry and fields such as healthcare for some time. It is a powerful technique, and an alternative to conventional stop watch time studies, used by industrial engineers to focus upon random work sampling observations. This study applies work sampling to the duties performed by an individual…

  13. Professional Development of English Professors in Indian Engineering Colleges: The Need of the Hour

    Science.gov (United States)

    Clement, A.; Murugavel, T.

    2015-01-01

    English has become the language of international business and in this age of globalization, communication skills in the English language are of supreme importance in the professional success of individuals. In India, the percentage of engineering graduates who remain unemployed after graduation steadily increases due to lack of soft skills…

  14. Heat engine and electric motor torque distribution strategy for a hybrid electric vehicle

    Science.gov (United States)

    Boberg, Evan S.; Gebby, Brian P.

    1999-09-28

    A method is provided for controlling a power train system for a hybrid electric vehicle. The method includes a torque distribution strategy for controlling the engine and the electric motor. The engine and motor commands are determined based upon the accelerator position, the battery state of charge and the amount of engine and motor torque available. The amount of torque requested for the engine is restricted by a limited rate of rise in order to reduce the emissions from the engine. The limited engine torque is supplemented by motor torque in order to meet a torque request determined based upon the accelerator position.

  15. Trajectories of Electrical Engineering and Computer Engineering Students by Race and Gender

    Science.gov (United States)

    Lord, S. M.; Layton, R. A.; Ohland, M. W.

    2011-01-01

    Electrical engineering (EE) is one of the largest engineering disciplines. Computer engineering (CpE) has a similar curriculum, but different demographics and student outcomes. Using a dataset from universities in the U.S. that includes over 70,000 students who majored in engineering, this paper describes the outcomes for students matriculating in…

  16. Structural Probability Concepts Adapted to Electrical Engineering

    Science.gov (United States)

    Steinberg, Eric P.; Chamis, Christos C.

    1994-01-01

    Through the use of equivalent variable analogies, the authors demonstrate how an electrical subsystem can be modeled by an equivalent structural subsystem. This allows the electrical subsystem to be probabilistically analyzed by using available structural reliability computer codes such as NESSUS. With the ability to analyze the electrical subsystem probabilistically, we can evaluate the reliability of systems that include both structural and electrical subsystems. Common examples of such systems are a structural subsystem integrated with a health-monitoring subsystem, and smart structures. Since these systems have electrical subsystems that directly affect the operation of the overall system, probabilistically analyzing them could lead to improved reliability and reduced costs. The direct effect of the electrical subsystem on the structural subsystem is of secondary order and is not considered in the scope of this work.

  17. Engineering Electricity Markets for a Decarbonized Energy System

    DEFF Research Database (Denmark)

    Jenle, Rasmus Ploug; Pallesen, Trine

    Decarbonization of the Danish electricity sector has recently been sought achieved through the introduction of a novel retail electricity market, named EcoGrid, designed to create price responsive consumers. By following the market design process undertaken by engineers at the Technical University...... of Denmark, the analysis addresses the question: how do engineers make markets? The answer to this question as presented here is: engineers design control systems. By tracing the origins of EcoGrid, this paper documents the governing of electricity consumers through a ‘synthetic market’, i.e. a market...... artifact devised to attain specified objectives within a specific task environment. It is shown that EcoGrid has been designed by modelling a retail electricity market on three different concepts from control systems engineering. These findings are used as a springboard to discuss the implications...

  18. CDIO – The steam engine powering the electric grid

    DEFF Research Database (Denmark)

    Træholt, Chresten; Holbøll, Joachim; Thomsen, Ole Cornelius

    2011-01-01

    and formulation, experimental inquiry and modelling, finally leading to planning and solution. The goal is to acquire the skills that are needed for an engineer within electric power engineering to analyse a given task, define the necessary steps to solve the task, organize him/her self and others and finally...... solve the task with success. The concrete work is built up around a miniaturized electric energy system powered by a steam engine. The system mimics an essential sub-section of a real electric power system. The process is realised with a combination of optional lectures, optional exercises, 3 set......-ons such as a solar panel or a cable connection to other similar systems and the acquisition of basic skills within electric power engineering....

  19. MX magnet system. [Electrical and engineering design characteristics

    Energy Technology Data Exchange (ETDEWEB)

    Bulmer, R.H.; Calderon, M.O.; Cornish, D.N.; Kozman, T.A.; Sackett, S.J.

    1976-06-24

    A conceptual drawing of the MX experiment is given. The central feature of the MX is a large superconducting magnet. The magnet parameters and conductor parameters are listed. The electrical and engineering design of the magnet is given.

  20. Electrical engineering research support for FDOT Traffic Statistics Office

    Science.gov (United States)

    2010-03-01

    The aim of this project was to provide electrical engineering support for the telemetered traffic monitoring sites (TTMSs) operated by the Statistics Office of the Florida Department of Transportation. This project was a continuation of project BD-54...

  1. Electrical circuits in biomedical engineering problems with solutions

    CERN Document Server

    Keskin, Ali Ümit

    2017-01-01

    This authored monograph presents a comprehensive and in-depth analysis of electrical circuit theory in biomedical engineering, ideally suited as textbook for a course program. The book contains methods and theory, but the topical focus is placed on practical applications of circuit theory, including problems, solutions and case studies. The target audience primarily comprises researchers and experts in electrical engineering who intend to embark on biomedical applications. The book is also very well suited for graduate students in the field. .

  2. Secondary electric power generation with minimum engine bleed

    Science.gov (United States)

    Tagge, G. E.

    1983-01-01

    Secondary electric power generation with minimum engine bleed is discussed. Present and future jet engine systems are compared. The role of auxiliary power units is evaluated. Details of secondary electric power generation systems with and without auxiliary power units are given. Advanced bleed systems are compared with minimum bleed systems. A cost model of ownership is given. The difference in the cost of ownership between a minimum bleed system and an advanced bleed system is given.

  3. Teaching Electricity and Engineering with LEDs

    Science.gov (United States)

    Johnstone, Christopher

    2014-01-01

    When learning about electricity, students are typically asked to complete a simple circuit involving a battery, wire, and lightbulb. This activity can be enhanced by adding discussion and discourse and can take on a unique final form in the case of "The Friendship Detector." In such electrical circuit activities, the completed circuit is…

  4. Biomedical Instrumentation : How electrical engineering can cure you

    NARCIS (Netherlands)

    French, P.J.

    2012-01-01

    The interaction between electrical engineering and bio-medicine can be traced back centuries to the discovery that muscles work with electrical pulses. However, these early experiments did not lead to direct medical applications. The era of microelectronics has brought many new medical applications,

  5. 77 FR 74125 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2012-12-13

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all General Electric...

  6. 77 FR 58471 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2012-09-21

    ...-30-AD; Amendment 39-17203; AD 2012-19-08] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. SUMMARY: We are adopting a new airworthiness directive (AD) for General Electric Company...

  7. 78 FR 72552 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-12-03

    ...-18-AD; Amendment 39-17669; AD 2013-23-14] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain General Electric Company model GEnx...

  8. 78 FR 19983 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-04-03

    ...-37-AD; Amendment 39-17403; AD 2013-06-06] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for General Electric Company (GE) CF34-8C and CF34...

  9. 76 FR 67594 - Airworthiness Directives; General Electric Company Turboshaft Engines

    Science.gov (United States)

    2011-11-02

    ...-29-AD; Amendment 39-16840; AD 2011-21-17] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turboshaft Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. SUMMARY: We are adopting a new airworthiness directive (AD) for all General Electric...

  10. A concept for a bachelor program in electrical engineering

    DEFF Research Database (Denmark)

    Niemann, Hans Henrik

    2011-01-01

    The main concept for the Bachelor of Science in Engineering (BScE) in electrical engineering at Technical University of Denmark (DTU) will be described in this paper. A new curriculum was introduced from the start of the autumn semester in 2010. The curriculum was the result of more than one year...

  11. International conference in electrical engineering and intelligent systems

    CERN Document Server

    Gelman, Len; Electrical Engineering and Intelligent Systems

    2013-01-01

    The revised and extended papers collected in this volume represent the cutting-edge of research at the nexus of electrical engineering and intelligent systems. They were selected from well over 1000 papers submitted to the high-profile international World Congress on Engineering held in London in July 2011. The chapters cover material across the full spectrum of work in the field, including computational intelligence, control engineering, network management, and wireless networks. Readers will also find substantive papers on signal processing, Internet computing, high performance computing, and industrial applications.   The Electrical Engineering and Intelligent Systems conference, as part of the 2011 World Congress on Engineering was organized under the auspices of the non-profit International Association of Engineers (IAENG). With more than 30 nations represented on the conference committees alone, the Congress features the best and brightest scientific minds from a multitude of disciplines related to eng...

  12. Electrical Engineering. Electrical Utilization Systems. Design Manual-4.4.

    Science.gov (United States)

    1979-12-01

    calculations shall be clearly shown so that any changes that become necessary due to resiting or revisions during construction can be made efficiently. When...mechanical/ electrical systems such as lighting and heating , ventilating and air conditioning, and for multiple tenants within a building. d. Short

  13. Electrifying the construction process : Replacing diesel engines with electric motors

    OpenAIRE

    Willerström, Jakob; Linde, Adam; Fagrell, Johannes

    2015-01-01

    Diesel engines are commonly used in construction machines, for example excavators. In a diesel engine, the combustion of diesel is a process with a considerable environmental impact, with high amounts of emitted greenhouse gases. The bachelor thesis creates a model that investigates the potential of decreasing the environmental impact when replacing diesel engines with electric motors in the construction phase of the construction process of buildings. The model was made in three steps. In the...

  14. Ten essential skills for electrical engineers

    CERN Document Server

    Dorr, Barry

    2014-01-01

    Engineers know that, as in any other discipline, getting a good job requires practical, up-to-date skills. An engineering degree provides a broad set of fundamentals. Ten Essential Skills applies those fundamentals to practical tasks required by employers. Written in a user-friendly, no-nonsense format, the book reviews practical skills using the latest tools and techniques, and features a companion website with interview practice problems and advanced material for readers wishing to pursue additional skills. With this book, aspiring and current engineers may approach job interviews confident

  15. Professor Sir Mark Walport Government Chief Scientific Adviser Head of Government Science and Engineering Profession Chief Executive Designate of UK Research and Innovation United Kingdom of Great Britain and Northern Ireland

    CERN Multimedia

    Bennett, Sophia Elizabeth

    2017-01-01

    Professor Sir Mark Walport Government Chief Scientific Adviser Head of Government Science and Engineering Profession Chief Executive Designate of UK Research and Innovation United Kingdom of Great Britain and Northern Ireland

  16. Student Learning Projects in Electric Vehicle Engineering

    DEFF Research Database (Denmark)

    Ritchie, Ewen; Leban, Krisztina Monika

    2012-01-01

    This paper presents the didactic problem based learning method in general use at Aalborg University as applied to Electric Mobility. Advantage is taken of this method to link student learning to current research projects. This offers advantages to the students and the researchers. The paper...

  17. Do electrical/control engineering early

    Energy Technology Data Exchange (ETDEWEB)

    Feldman, J.M.

    1984-11-01

    New industrial facilities, as well as additions to existing plants, are becoming increasingly expensive. The electrical and control systems departments can reduce the hours, cost and schedule of a major project. This paper examines various ways in which this can be achieved. In particular: Project planning Manning/schedules Equipment specification Interdiscipline coordination Area classification Distributed control Modular/preassembled construction Reorganization

  18. Situated Mathematics Teaching within Electrical Engineering Courses

    Science.gov (United States)

    Hennig, Markus; Mertsching, Bärbel; Hilkenmeier, Frederic

    2015-01-01

    The initial phase of undergraduate engineering degree programmes often comprises courses requiring mathematical expertise which in some cases clearly exceeds school mathematics, but will be imparted only later in mathematics courses. In this article, an approach addressing this challenge by way of example within a "fundamentals of electrical…

  19. Optimization of Electrical Stimulation Parameters for Cardiac Tissue Engineering

    Science.gov (United States)

    Tandon, Nina; Marsano, Anna; Maidhof, Robert; Wan, Leo; Park, Hyoungshin; Vunjak-Novakovic, Gordana

    2010-01-01

    In vitro application of pulsatile electrical stimulation to neonatal rat cardiomyocytes cultured on polymer scaffolds has been shown to improve the functional assembly of cells into contractile cardiac tissue constrcuts. However, to date, the conditions of electrical stimulation have not been optimized. We have systematically varied the electrode material, amplitude and frequency of stimulation, to determine the conditions that are optimal for cardiac tissue engineering. Carbon electrodes, exhibiting the highest charge-injection capacity and producing cardiac tissues with the best structural and contractile properties, and were thus used in tissue engineering studies. Cardiac tissues stimulated at 3V/cm amplitude and 3Hz frequency had the highest tissue density, the highest concentrations of cardiac troponin-I and connexin-43, and the best developed contractile behavior. These findings contribute to defining bioreactor design specifications and electrical stimulation regime for cardiac tissue engineering. PMID:21604379

  20. Recent advances in electrical engineering and control applications

    CERN Document Server

    Bououden, Sofiane; Zelinka, Ivan

    2017-01-01

    This book of proceedings includes papers presenting the state of art in electrical engineering and control theory as well as their applications. The topics focus on classical as well as modern methods for modeling, control, identification and simulation of complex systems with applications in science and engineering. The papers were selected from the hottest topic areas, such as control and systems engineering, renewable energy, faults diagnosis—faults tolerant control, large-scale systems, fractional order systems, unconventional algorithms in control engineering, signals and communications. The control and design of complex systems dynamics, analysis and modeling of its behavior and structure is vitally important in engineering, economics and in science generally science today. Examples of such systems can be seen in the world around us and are a part of our everyday life. Application of modern methods for control, electronics, signal processing and more can be found in our mobile phones, car engines, hom...

  1. First International Conference on Electrical, Electronic and Communications Engineering

    CERN Document Server

    Vyas, Nalinaksh; Sanei, Saeid; Deb, Kalyanmoy

    2017-01-01

    The book reports on advanced theories and methods in two related engineering fields: electrical and electronic engineering, and communications engineering and computing. It highlights areas of global and growing importance, such as renewable energy, power systems, mobile communications, security and the Internet of Things (IoT). The contributions cover a number of current research issues, including smart grids, photovoltaic systems, wireless power transfer, signal processing, 4G and 5G technologies, IoT applications, mobile cloud computing and many more. Based on the proceedings of the first International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering (ELECOM 2016), held in Voila Bagatelle, Mauritius from November 25 to 27, 2016, the book provides graduate students, researchers and professionals with a snapshot of the state-of-the-art and a source of new ideas for future research and collaborations.

  2. Nuclear electric propulsion mission engineering study. Volume 2: Final report

    Science.gov (United States)

    1973-01-01

    Results of a mission engineering analysis of nuclear-thermionic electric propulsion spacecraft for unmanned interplanetary and geocentric missions are summarized. Critical technologies associated with the development of nuclear electric propulsion (NEP) are assessed, along with the impact of its availability on future space programs. Outer planet and comet rendezvous mission analysis, NEP stage design for geocentric and interplanetary missions, NEP system development cost and unit costs, and technology requirements for NEP stage development are studied.

  3. How Engineers Make Markets Organizing Electricity System Decarbonization

    DEFF Research Database (Denmark)

    Jenle, Rasmus Ploug; Pallesen, Trine

    2017-01-01

    construction process undertaken by scientists at the Technical University of Denmark, this article shows how engineers have approached the task by designing markets as technical control systems. It is demonstrated that EcoGrid has been designed by modeling a retail electricity market on three different...... conceptions of control systems as found in the discipline of control systems engineering. By tracing the origins of EcoGrid, this article documents the governing of electricity consumers through what we here call a synthetic market, i.e. a market artifact devised to attain goals. These findings about...

  4. Design of electrical stimulation bioreactors for cardiac tissue engineering.

    Science.gov (United States)

    Tandon, N; Marsano, A; Cannizzaro, C; Voldman, J; Vunjak-Novakovic, G

    2008-01-01

    Electrical stimulation has been shown to improve functional assembly of cardiomyocytes in vitro for cardiac tissue engineering. Carbon electrodes were found in past studies to have the best current injection characteristics. The goal of this study was to develop rational experimental design principles for the electrodes and stimulation regime, in particular electrode configuration, electrode ageing, and stimulation amplitude. Carbon rod electrodes were compared via electrochemical impedance spectroscopy (EIS) and we identified a safety range of 0 to 8 V/cm by comparing excitation thresholds and maximum capture rates for neonatal rat cardiomyocytes cultured with electrical stimulation. We conclude with recommendations for studies involving carbon electrodes for cardiac tissue engineering.

  5. 78 FR 24671 - Airworthiness Directives; General Electric Company Turbofan Engines

    Science.gov (United States)

    2013-04-26

    ... Electric Company (GE) CF6-80C2 A1/A2/A3/A5/A8/A5F/B1/B2/B4/B5F/B6/B1F/B2F/B4F/B6F/B7F/D1F turbofan engines...-AD; Amendment 39-17438; AD 2013-08-20] RIN 2120-AA64 Airworthiness Directives; General Electric Company Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY...

  6. Euclides Roxo: engineer, teacher, intellectual, and mathematics educator Euclides Roxo: engenheiro, professor, intelectual e educador matemático

    Directory of Open Access Journals (Sweden)

    Bruno Alves Dassie

    2010-06-01

    Full Text Available This paper presents Euclides Roxo’s professional life, taking into account his past experiences before he became an educational reformer. We describe the work possibilities for engineers in Brazil at the beginning of the 20th Century to show that Roxo’s option for a teaching career was influenced by the society in which he lived. On the other hand, his years as a teacher at the Instituto de Educação in Rio de Janeiro are essential to study the evolution of Roxo’s educational ideas, since this institution provided him with the necessary stimulus for the development of his ideas. We also briefly present some of his other educational activities. We think we can justly claim that Euclides Roxo was an intellectual working as a mathematics teacher, indeed a mathematics educator. Keywords: Euclides Roxo. History of mathematics education. mathematics educator. Institutionalization of mathematics teachers.Este artigo apresenta a trajetória profissional de Euclides Roxo considerando fatos que precederam sua atuação como reformador educacional. São apresentadas considerações sobre o mercado de trabalho do engenheiro no início do século XX, para mostrar que a opção de Euclides Roxo pelo magistério não foi autônoma em relação ao quadro da sociedade da época. Por outro lado, sua atuação no Instituto de Educação do Rio de Janeiro, antiga Escola Normal, é essencial para analisar a gênese de suas idéias, pois esta instituição apresentou um ambiente educacional propício. Por fim, apresentamos de forma breve outras instâncias de atuação de Euclides Roxo. Dessa forma, podemos considerar Euclides Roxo como um intelectual atuante no ensino da matemática, ou seja, um educador matemático. Palavras-chave: Euclides Roxo. História da Educação Matemática. Institucionalização do professor de matemática. Educador Matemático.

  7. Magnetic and electrical control of engineered materials

    Science.gov (United States)

    Schuller, Ivan K.; de La Venta Granda, Jose; Wang, Siming; Ramirez, Gabriel; Erekhinskiy, Mikhail; Sharoni, Amos

    2016-08-16

    Methods, systems, and devices are disclosed for controlling the magnetic and electrical properties of materials. In one aspect, a multi-layer structure includes a first layer comprising a ferromagnetic or ferrimagnetic material, and a second layer positioned within the multi-layer structure such that a first surface of the first layer is in direct physical contact with a second surface of the second layer. The second layer includes a material that undergoes structural phase transitions and metal-insulator transitions upon experiencing a change in temperature. One or both of the first and second layers are structured to allow a structural phase change associated with the second layer cause a change magnetic properties of the first layer.

  8. 46 CFR 113.35-5 - Electric engine order telegraph systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Electric engine order telegraph systems. 113.35-5... COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT Engine Order Telegraph Systems § 113.35-5 Electric engine order telegraph systems. (a) Each electric engine order telegraph system must have transmitters and indicators...

  9. Scenario Based E-Learning in Electrical Engineering Education

    Science.gov (United States)

    Tambunan, Hamonangan; Dalimunte, Amirhud; Silitonga, Marsangkap

    2017-01-01

    The scenario based e-learning in Electrical Engineering Education Learning (EEEL) was developed by covering the scope and characteristics of all subjects and the competence unit of graduates in the field of pedagogy, professional, social and personality, with url addresed http://jpte-ft-unimed.edu20.org. The scenario incorporates the concept of…

  10. Multiple choice questions in electronics and electrical engineering

    CERN Document Server

    DAVIES, T J

    2013-01-01

    A unique compendium of over 2000 multiple choice questions for students of electronics and electrical engineering. This book is designed for the following City and Guilds courses: 2010, 2240, 2320, 2360. It can also be used as a resource for practice questions for any vocational course.

  11. Perception of Leadership in Electrical Engineering Students, UTHM

    Science.gov (United States)

    Saari, Farrah Atikah Binti; Ghani, Nor Aslasiah Binti

    2015-01-01

    Demand for graduates with leadership skills more in priority to meet the needs of human resources. Hence, this study was undertaken to investigate the level of leadership skills among students in Electrical Engineering at University Tun Hussein Onn Malaysia. Descriptive study carried out to evaluate student leadership. The study sample consisted…

  12. Chips for Everyone: A Multifaceted Approach in Electrical Engineering Outreach

    Science.gov (United States)

    Magill, J.; Roy, S.

    2010-01-01

    This paper reports on a multifaceted approach in electrical engineering outreach focused on the area of semiconductor technology. The activities developed can be used in combination for a very wide range of audiences in both age and stage of education, as has been demonstrated with great success. Moreover, the project has developed…

  13. On Analysis of Electrical Engineering Programme in GCC Countries

    Science.gov (United States)

    Memon, Qurban A.

    2007-01-01

    Electrical engineering (EE) curricula in the Gulf Cooperation Council (GCC) region have gone through an evolutionary process, and are now approaching a maturity level. In order to address academic and local industrial needs in a unified way, a need has been felt to investigate EE curricula in a way that highlights theoretical understanding, design…

  14. Teaching Sustainability Analysis in Electrical Engineering Lab Courses

    Science.gov (United States)

    Braun, D.

    2010-01-01

    Laboratory courses represent an incompletely tapped opportunity to teach sustainability concepts. This work introduces and evaluates a simple strategy used to teach sustainability concepts in electrical engineering laboratory courses. The technique would readily adapt to other disciplines. The paper presents assessment data and a wiki containing…

  15. Professional Socialization of Electrical Engineers in University Education

    Science.gov (United States)

    Keltikangas, Kirsti; Martinsuo, Miia

    2009-01-01

    University educators constantly seek ways in which courses and curricula would promote students' professional development in line with the needs of industries. The purpose of this study was to develop a framework for analysing professional socialization particularly in the context of electrical engineering education and explore factors associated…

  16. 10th International Conference on Scientific Computing in Electrical Engineering

    CERN Document Server

    Clemens, Markus; Günther, Michael; Maten, E

    2016-01-01

    This book is a collection of selected papers presented at the 10th International Conference on Scientific Computing in Electrical Engineering (SCEE), held in Wuppertal, Germany in 2014. The book is divided into five parts, reflecting the main directions of SCEE 2014: 1. Device Modeling, Electric Circuits and Simulation, 2. Computational Electromagnetics, 3. Coupled Problems, 4. Model Order Reduction, and 5. Uncertainty Quantification. Each part starts with a general introduction followed by the actual papers. The aim of the SCEE 2014 conference was to bring together scientists from academia and industry, mathematicians, electrical engineers, computer scientists, and physicists, with the goal of fostering intensive discussions on industrially relevant mathematical problems, with an emphasis on the modeling and numerical simulation of electronic circuits and devices, electromagnetic fields, and coupled problems. The methodological focus was on model order reduction and uncertainty quantification.

  17. Research on the Fault Coefficient in Complex Electrical Engineering

    Directory of Open Access Journals (Sweden)

    Yi Sun

    2015-08-01

    Full Text Available Fault detection and isolation in a complex system are research hotspots and frontier problems in the reliability engineering field. Fault identification can be regarded as a procedure of excavating key characteristics from massive failure data, then classifying and identifying fault samples. In this paper, based on the fundamental of feature extraction about the fault coefficient, we will discuss the fault coefficient feature in complex electrical engineering in detail. For general fault types in a complex power system, even if there is a strong white Gaussian stochastic interference, the fault coefficient feature is still accurate and reliable. The results about comparative analysis of noise influence will also demonstrate the strong anti-interference ability and great redundancy of the fault coefficient feature in complex electrical engineering.

  18. World Wide Web archive for electric power engineering education

    Energy Technology Data Exchange (ETDEWEB)

    Doulai, P. [Wollongong Univ., NSW (Australia)

    1995-12-31

    In recent years, the Internet and its new glamour, the World Wide Web (WWW or Web for short), has introduced radical changes in the direction of knowledge and information disseminations world-wide. The Department of Electrical and Computer Engineering at University of Wollongong has recently set up a WWW public domain clearinghouse (Home Page, URL http://www.uow.edu.au/public/pwrsysed/homepage.html) supporting and promoting the use of computers in engineering education in general and electric power education in particular. This paper provides a brief introduction to the Home Page and its five major nodes (sub-pages). It also provides some background information about the World Wide Web and its potential usage for engineering education. (author). 3 figs., 3 refs.

  19. Stand for testing the electrical race car engine

    Science.gov (United States)

    Baier, M.; Franiasz, J.; Mierzwa, P.; Wylenzek, D.

    2015-11-01

    An engine test stand created especially for research of electrical race car is described in the paper. The car is an aim of Silesian Greenpower project whose participants build and test electrical vehicles to take part in international races in Great Britain. The engine test stand is used to test and measure the characteristics of vehicles and their engines. It has been designed particularly to test the electric cars engineered by students of Silesian Greenpower project. The article contains a description how the test stand works and shows its versatility in many areas. The paper presents both construction of the test stand, control system and sample results of conducted research. The engine test stand was designed and modified using PLM Siemens NX 8.5. The construction of the test stand is highly modular, which means it can be used both for testing the vehicle itself or for tests without the vehicle. The test stand has its own wheel, motor, powertrain and braking system with second engine. Such solution enables verifying various concepts without changing the construction of the vehicle. The control system and measurement system are realized by enabling National Instruments product myRIO (RIO - Reconfigurable Input/Output). This controller in combination with powerful LabVIEW environment performs as an advanced tool to control torque and speed simultaneously. It is crucial as far as the test stand is equipped in two motors - the one being tested and the braking one. The feedback loop is realized by an optical encoder cooperating with the rotor mounted on the wheel. The results of tests are shown live on the screen both as a chart and as single values. After performing several tests there is a report generated. The engine test stand is widely used during process of the Silesian Greenpower vehicle design. Its versatility enables powertrain testing, wheels and tires tests, thermal analysis and more.

  20. Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

    Directory of Open Access Journals (Sweden)

    Lino Guzzella

    2013-07-01

    Full Text Available In this paper we demonstrate the potential of combining electric hybridization with a dual-fuel natural gas-Diesel engine. We show that carbon dioxide emissions can be reduced to 43 gram per kilometer with a subcompact car on the New European Driving Cycle (NEDC. The vehicle is operated in charge-sustaining mode, which means that all energy is provided by the fuel. The result is obtained by hardware-in-the-loop experiments where the engine is operated on a test bench while the rest of the powertrain as well as the vehicle are simulated. By static engine measurements we demonstrate that the natural gas-Diesel engine reaches efficiencies of up to 39.5%. The engine is operated lean at low loads with low engine out nitrogen oxide emissions such that no nitrogen oxide aftertreatment is necessary. At medium to high loads the engine is operated stoichiometrically, which enables the use of a cost-efficient three-way catalytic converter. By vehicle emulation of a non-hybrid vehicle on the Worldwide harmonized Light vehicles Test Procedure (WLTP, we demonstrate that transient operation of the natural gas-Diesel engine is also possible, thus enabling a non-hybridized powertrain as well.

  1. Innovative technologies in course Electrical engineering and electronics

    Science.gov (United States)

    Kuznetsov, E. V.; Kiselev, V. I.; Kulikova, E. A.

    2017-11-01

    Department of Electrical Engineering and Nondestructive Testing, NRU “MPEI”, has been working on development Electronic Learning Resources (ELRs) in course Electrical Engineering and Electronics for several years. This work have been focused on education intensification and effectiveness while training bachelors in nonelectrical specializations including students from Thermal and Atomic Power Engineering Institute. The developed ELRs are united in a tutorial module consisting of three parts (Electrical Circuits, Electrical Machines, Basics of Electronics): electronic textbook and workbook (ETW); virtual laboratory sessions (VLS); training sessions (ETS); personal tasks (PT); testing system that contains electronic tests in all course subjects and built-in verification of a student’s work results in ETW, VLS, ETS, PT. The report presents samples of different ELRs in html format and MathCAD, MatLAB Simulink applications, copyrighted programs in Java2, Delphi, VB6, C++. The report also contains the experience description, advantages and disadvantages of the new technologies. It is mentioned that ELRs provide new opportunities in course studying.

  2. Electrical stimulation: a novel tool for tissue engineering.

    Science.gov (United States)

    Balint, Richard; Cassidy, Nigel J; Cartmell, Sarah H

    2013-02-01

    New advances in tissue engineering are being made through the application of different types of electrical stimuli to influence cell proliferation and differentiation. Developments made in the last decade have allowed us to improve the structure and functionality of tissue-engineered products through the use of growth factors, hormones, drugs, physical stimuli, bioreactor use, and two-dimensional (2-D) and three-dimensional (3-D) artificial extracellular matrices (with various material properties and topography). Another potential type of stimulus is electricity, which is important in the physiology and development of the majority of all human tissues. Despite its great potential, its role in tissue regeneration and its ability to influence cell migration, orientation, proliferation, and differentiation has rarely been considered in tissue engineering. This review highlights the importance of endogenous electrical stimulation, gathering the current knowledge on its natural occurrence and role in vivo, discussing the novel methods of delivering this stimulus and examining its cellular and tissue level effects, while evaluating how the technique could benefit the tissue engineering discipline in the future.

  3. MEMS CLOSED CHAMBER HEAT ENGINE AND ELECTRIC GENERATOR

    Science.gov (United States)

    Landis, Geoffrey A. (Inventor)

    2005-01-01

    A heat engine, preferably combined with an electric generator, and advantageously implemented using micro-electromechanical system (MEMS) technologies as an array of one or more individual heat engine/generators. The heat engine is based on a closed chamber containing a motive medium, preferably a gas; means for alternately enabling and disabling transfer of thermal energy from a heat source to the motive medium; and at least one movable side of the chamber that moves in response to thermally-induced expansion and contraction of the motive medium, thereby converting thermal energy to oscillating movement. The electrical generator is combined with the heat engine to utilize movement of the movable side to convert mechanical work to electrical energy, preferably using electrostatic interaction in a generator capacitor. Preferably at least one heat transfer side of the chamber is placed alternately into and out of contact with the heat source by a motion capacitor, thereby alternately enabling and disabling conductive transfer of heat to the motive medium.

  4. Influence of electrical resistivity and machining parameters on electrical discharge machining performance of engineering ceramics.

    Directory of Open Access Journals (Sweden)

    Renjie Ji

    Full Text Available Engineering ceramics have been widely used in modern industry for their excellent physical and mechanical properties, and they are difficult to machine owing to their high hardness and brittleness. Electrical discharge machining (EDM is the appropriate process for machining engineering ceramics provided they are electrically conducting. However, the electrical resistivity of the popular engineering ceramics is higher, and there has been no research on the relationship between the EDM parameters and the electrical resistivity of the engineering ceramics. This paper investigates the effects of the electrical resistivity and EDM parameters such as tool polarity, pulse interval, and electrode material, on the ZnO/Al2O3 ceramic's EDM performance, in terms of the material removal rate (MRR, electrode wear ratio (EWR, and surface roughness (SR. The results show that the electrical resistivity and the EDM parameters have the great influence on the EDM performance. The ZnO/Al2O3 ceramic with the electrical resistivity up to 3410 Ω·cm can be effectively machined by EDM with the copper electrode, the negative tool polarity, and the shorter pulse interval. Under most machining conditions, the MRR increases, and the SR decreases with the decrease of electrical resistivity. Moreover, the tool polarity, and pulse interval affect the EWR, respectively, and the electrical resistivity and electrode material have a combined effect on the EWR. Furthermore, the EDM performance of ZnO/Al2O3 ceramic with the electrical resistivity higher than 687 Ω·cm is obviously different from that with the electrical resistivity lower than 687 Ω·cm, when the electrode material changes. The microstructure character analysis of the machined ZnO/Al2O3 ceramic surface shows that the ZnO/Al2O3 ceramic is removed by melting, evaporation and thermal spalling, and the material from the working fluid and the graphite electrode can transfer to the workpiece surface during electrical

  5. Influence of electrical resistivity and machining parameters on electrical discharge machining performance of engineering ceramics.

    Science.gov (United States)

    Ji, Renjie; Liu, Yonghong; Diao, Ruiqiang; Xu, Chenchen; Li, Xiaopeng; Cai, Baoping; Zhang, Yanzhen

    2014-01-01

    Engineering ceramics have been widely used in modern industry for their excellent physical and mechanical properties, and they are difficult to machine owing to their high hardness and brittleness. Electrical discharge machining (EDM) is the appropriate process for machining engineering ceramics provided they are electrically conducting. However, the electrical resistivity of the popular engineering ceramics is higher, and there has been no research on the relationship between the EDM parameters and the electrical resistivity of the engineering ceramics. This paper investigates the effects of the electrical resistivity and EDM parameters such as tool polarity, pulse interval, and electrode material, on the ZnO/Al2O3 ceramic's EDM performance, in terms of the material removal rate (MRR), electrode wear ratio (EWR), and surface roughness (SR). The results show that the electrical resistivity and the EDM parameters have the great influence on the EDM performance. The ZnO/Al2O3 ceramic with the electrical resistivity up to 3410 Ω·cm can be effectively machined by EDM with the copper electrode, the negative tool polarity, and the shorter pulse interval. Under most machining conditions, the MRR increases, and the SR decreases with the decrease of electrical resistivity. Moreover, the tool polarity, and pulse interval affect the EWR, respectively, and the electrical resistivity and electrode material have a combined effect on the EWR. Furthermore, the EDM performance of ZnO/Al2O3 ceramic with the electrical resistivity higher than 687 Ω·cm is obviously different from that with the electrical resistivity lower than 687 Ω·cm, when the electrode material changes. The microstructure character analysis of the machined ZnO/Al2O3 ceramic surface shows that the ZnO/Al2O3 ceramic is removed by melting, evaporation and thermal spalling, and the material from the working fluid and the graphite electrode can transfer to the workpiece surface during electrical discharge

  6. Ceramic thermal barrier coatings for electric utility gas turbine engines

    Science.gov (United States)

    Miller, R. A.

    1986-01-01

    Research and development into thermal barrier coatings for electric utility gas turbine engines is reviewed critically. The type of coating systems developed for aircraft applications are found to be preferred for clear fuel electric utility applications. These coating systems consists of a layer of plasma sprayed zirconia-yttria ceramic over a layer of MCrAly bond coat. They are not recommended for use when molten salts are presented. Efforts to understand coating degradation in dirty environments and to develop corrosion resistant thermal barrier coatings are discussed.

  7. Nuclear electric propulsion mission engineering study. Volume 1: Executive summary

    Science.gov (United States)

    1973-01-01

    Results of a mission engineering analysis of nuclear-thermionic electric propulsion spacecraft for unmanned interplanetary and geocentric missions are summarized. Critical technologies associated with the development of nuclear electric propulsion (NEP) are assessed. Outer planet and comet rendezvous mission analysis, NEP stage design for geocentric and interplanetary missions, NEP system development cost and unit costs, and technology requirements for NEP stage development are studied. The NEP stage design provides both inherent reliability and high payload mass capability. The NEP stage and payload integration was found to be compatible with the space shuttle.

  8. Electrical Prototype Power Processor for the 30-cm Mercury electric propulsion engine

    Science.gov (United States)

    Biess, J. J.; Frye, R. J.

    1978-01-01

    An Electrical Prototpye Power Processor has been designed to the latest electrical and performance requirements for a flight-type 30-cm ion engine and includes all the necessary power, command, telemetry and control interfaces for a typical electric propulsion subsystem. The power processor was configured into seven separate mechanical modules that would allow subassembly fabrication, test and integration into a complete power processor unit assembly. The conceptual mechanical packaging of the electrical prototype power processor unit demonstrated the relative location of power, high voltage and control electronic components to minimize electrical interactions and to provide adequate thermal control in a vacuum environment. Thermal control was accomplished with a heat pipe simulator attached to the base of the modules.

  9. Electric Utility Transmission and Distribution Line Engineering Program

    Energy Technology Data Exchange (ETDEWEB)

    Peter McKenny

    2010-08-31

    Economic development in the United States depends on a reliable and affordable power supply. The nation will need well educated engineers to design a modern, safe, secure, and reliable power grid for our future needs. An anticipated shortage of qualified engineers has caused considerable concern in many professional circles, and various steps are being taken nationwide to alleviate the potential shortage and ensure the North American power system's reliability, and our world-wide economic competitiveness. To help provide a well-educated and trained workforce which can sustain and modernize the nation's power grid, Gonzaga University's School of Engineering and Applied Science has established a five-course (15-credit hour) Certificate Program in Transmission and Distribution (T&D) Engineering. The program has been specifically designed to provide working utility engineering professionals with on-line access to advanced engineering courses which cover modern design practice with an industry-focused theoretical foundation. A total of twelve courses have been developed to-date and students may select any five in their area of interest for the T&D Certificate. As each course is developed and taught by a team of experienced engineers (from public and private utilities, consultants, and industry suppliers), students are provided a unique opportunity to interact directly with different industry experts over the eight weeks of each course. Course material incorporates advanced aspects of civil, electrical, and mechanical engineering disciplines that apply to power system design and are appropriate for graduate engineers. As such, target students for the certificate program include: (1) recent graduates with a Bachelor of Science Degree in an engineering field (civil, mechanical, electrical, etc.); (2) senior engineers moving from other fields to the utility industry (i.e. paper industry to utility engineering or project management positions); and (3) regular

  10. The electric power engineering handbook power system stability and control

    CERN Document Server

    Grisby, Leonard L

    2012-01-01

    With contributions from worldwide leaders in the field, Power System Stability and Control, Third Edition (part of the five-volume set, The Electric Power Engineering Handbook) updates coverage of recent developments and rapid technological growth in essential aspects of power systems. Edited by L.L. Grigsby, a respected and accomplished authority in power engineering, and section editors Miroslav Begovic, Prabha Kundur, and Bruce Wollenberg, this reference presents substantially new and revised content. Topics covered include: * Power System Protection * Power System Dynamics and Stability *

  11. Electrical, electronics, and digital hardware essentials for scientists and engineers

    CERN Document Server

    Lipiansky, Ed

    2012-01-01

    A practical guide for solving real-world circuit board problems Electrical, Electronics, and Digital Hardware Essentials for Scientists and Engineers arms engineers with the tools they need to test, evaluate, and solve circuit board problems. It explores a wide range of circuit analysis topics, supplementing the material with detailed circuit examples and extensive illustrations. The pros and cons of various methods of analysis, fundamental applications of electronic hardware, and issues in logic design are also thoroughly examined. The author draws on more than tw

  12. Hybrid-Electric Vehicle with Natural Gas-Diesel Engine

    OpenAIRE

    Lino Guzzella; Christopher Onder; Tobias Ott

    2013-01-01

    In this paper we demonstrate the potential of combining electric hybridization with a dual-fuel natural gas-Diesel engine. We show that carbon dioxide emissions can be reduced to 43 gram per kilometer with a subcompact car on the New European Driving Cycle (NEDC). The vehicle is operated in charge-sustaining mode, which means that all energy is provided by the fuel. The result is obtained by hardware-in-the-loop experiments where the engine is operated on a test bench while the rest of the po...

  13. Statistical Physics: a Short Course for Electrical Engineering Students

    OpenAIRE

    Merhav, Neri

    2013-01-01

    This is a set of lecture notes of a course on statistical physics and thermodynamics, which is oriented, to a certain extent, towards electrical engineering students. The main body of the lectures is devoted to statistical physics, whereas much less emphasis is given to the thermodynamics part. In particular, the idea is to let the most important results of thermodynamics (most notably, the laws of thermodynamics) to be obtained as conclusions from the derivations in statistical physics. Beyo...

  14. Design of Electrical Stimulation Bioreactors for Cardiac Tissue Engineering

    OpenAIRE

    Tandon, N.; Marsano, A.; Cannizzaro, C.; Voldman, J.; Vunjak-Novakovic, G.

    2008-01-01

    Electrical stimulation has been shown to improve functional assembly of cardiomyocytes in vitro for cardiac tissue engineering. Carbon electrodes were found in past studies to have the best current injection characteristics. The goal of this study was to develop rational experimental design principles for the electrodes and stimulation regime, in particular electrode configuration, electrode ageing, and stimulation amplitude. Carbon rod electrodes were compared via electrochemical impedance s...

  15. 46 CFR 113.35-7 - Electric engine order telegraph systems; operations.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Electric engine order telegraph systems; operations. 113.35-7 Section 113.35-7 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT Engine Order Telegraph Systems § 113.35-7 Electric...

  16. Fault mechanism analysis and simulation for continuity resistance test of electrical components in aircraft engine

    Science.gov (United States)

    Shi, Xudong; Yin, Yaping; Wang, Jialin; Sun, Zhaorong

    2017-01-01

    A large number of electrical components are used in civil aircraft engines, whose electrical circuits are usually intricate and complicated. Continuity resistance is an important parameter for the operating state of electrical components. Electrical continuity fault has serious impact on the reliability of the aircraft engine. In this paper, mathematical models of electrical components are established, and simulation is made by Simulink to analyze the electrical continuity fault.

  17. Designing, Implementing and Maintaining a First Year Project Course in Electrical Engineering

    Science.gov (United States)

    Lillieskold, J.; Ostlund, S.

    2008-01-01

    Being a modern electrical engineer does not only require state of the art skills in areas such as transfer and processing of information, electronics, systems engineering, and biomedical electrical engineering; it also requires generic engineering skills such as oral and written communication, team building, interpersonal skills, and the ability…

  18. Electric utility engineer`s FGD manual -- Volume 1: FGD process design. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-04

    Part 1 of the Electric Utility Engineer`s Flue Gas Desulfurization (FGD) Manual emphasizes the chemical and physical processes that form the basis for design and operation of lime- and limestone-based FGD systems applied to coal- or oil-fired steam electric generating stations. The objectives of Part 1 are: to provide a description of the chemical and physical design basis for lime- and limestone-based wet FGD systems; to identify and discuss the various process design parameters and process options that must be considered in developing a specification for a new FGD system; and to provide utility engineers with process knowledge useful for operating and optimizing a lime- or limestone-based wet FGD system.

  19. 5th International Conference on Electrical Engineering and Automatic Control

    CERN Document Server

    Yao, Yufeng

    2016-01-01

    On the basis of instrument electrical and automatic control system, the 5th International Conference on Electrical Engineering and Automatic Control (CEEAC) was established at the crossroads of information technology and control technology, and seeks to effectively apply information technology to a sweeping trend that views control as the core of intelligent manufacturing and life. This book takes a look forward into advanced manufacturing development, an area shaped by intelligent manufacturing. It highlights the application and promotion of process control represented by traditional industries, such as the steel industry and petrochemical industry; the technical equipment and system cooperative control represented by robot technology and multi-axis CNC; and the control and support of emerging process technologies represented by laser melting and stacking, as well as the emerging industry represented by sustainable and intelligent life. The book places particular emphasis on the micro-segments field, such as...

  20. Software Packages to Support Electrical Engineering Virtual Lab

    Directory of Open Access Journals (Sweden)

    Manuel Travassos Valdez

    2012-03-01

    Full Text Available The use of Virtual Reality Systems (VRS, as a learning aid, encourages the creation of tools that allow users/students to simulate educational environments on a computer. This article presents a way of building a VRS system with Software Packages to support Electrical Engineering Virtual Laboratories to be used in a near future in the teaching of the curriculum unit of Circuit Theory. The steps required for the construction of a project are presented in this paper. The simulation is still under construction and intends to use a three-dimensional virtual environment laboratory electric measurement, which will allow users/students to experiment and test the modeled equipment. Therefore, there are still no links available for further examination. The result may demonstrate the future potential of applications of Virtual Reality Systems as an efficient and cost-effective learning system.

  1. Low-temperature Stirling Engine for Geothermal Electricity Generation

    Energy Technology Data Exchange (ETDEWEB)

    Stillman, Greg [Cool Energy, Inc., Boulder, CO (United States); Weaver, Samuel P. [Cool Energy, Inc., Boulder, CO (United States)

    2013-03-27

    Up to 2700 terawatt-hours per year of geothermal electricity generation capacity has been shown to be available within North America, typically with wells drilled into geologically active regions of the earth's crust where this energy is concentrated (Huttrer, 2001). Of this potential, about half is considered to have temperatures high enough for conventional (steam-based) power production, while the other half requires unconventional power conversion approaches, such as organic Rankine cycle systems or Stirling engines. If captured and converted effectively, geothermal power generation could replace up to 100GW of fossil fuel electric power generation, leading to a significant reduction of US power sector emissions. In addition, with the rapid growth of hydro-fracking in oil and gas production, there are smaller-scale distributed power generation opportunities in heated liquids that are co-produced with the main products. Since 2006, Cool Energy, Inc. (CEI) has designed, fabricated and tested four generations of low-temperature (100°C to 300°C) Stirling engine power conversion equipment. The electric power output of these engines has been demonstrated at over 2kWe and over 16% thermal conversion efficiency for an input temperature of 215°C and a rejection temperature of 15°C. Initial pilot units have been shipped to development partners for further testing and validation, and significantly larger engines (20+ kWe) have been shown to be feasible and conceptually designed. Originally intended for waste heat recovery (WHR) applications, these engines are easily adaptable to geothermal heat sources, as the heat supply temperatures are similar. Both the current and the 20+ kWe designs use novel approaches of self-lubricating, low-wear-rate bearing surfaces, non-metallic regenerators, and high-effectiveness heat exchangers. By extending CEI's current 3 kWe SolarHeart® Engine into the tens of kWe range, many additional applications are possible, as one

  2. Promoting Active Learning in Electrical Engineering Basic Studies

    Directory of Open Access Journals (Sweden)

    Anu Lehtovuori

    2013-05-01

    Full Text Available Active learning, project-based teaching, and student collaboration are current trends in engineering education. Incorporating these have also been the goal of the basic studies development project EPOP started at the Aalto University School of Electrical Engineering in 2011. In the project, two obligatory basic courses in circuit analysis and electromagnetic field theory have been taught using interactive engagement during the spring of 2012. This paper presents the implementation of the teaching, including methods and evaluation with several concrete examples. As a result of the novel teaching, motivation and the engagement of students were at a high level during the whole course and learning results were better than those of the students participating the traditional lecture course.

  3. Near term electric test vehicle ETV-2 (Engineering Materials)

    Energy Technology Data Exchange (ETDEWEB)

    Engineering drawings are provided for ETV-2, a unique battery-powered passenger vehicle has been developed that provides a significant improvement over conventional electric vehicle performance, particularly during stop-and-go driving. The vehicle is unique in two major respects: (1) the power system incorporates a flywheel that stores energy during regenerative braking and makes possible the acceleration capability needed to keep up with traffic without reducing range to unacceptable values; and (2) lightweight plastic materials are used for the vehicle unibody to minimize weight and increase range. Reference DOE/CS/51213-01. (WHK)

  4. Engineering electrodynamics electric machine, transformer, and power equipment design

    CERN Document Server

    Turowski, Janusz

    2013-01-01

    Due to a huge concentration of electromagnetic fields and eddy currents, large power equipment and systems are prone to crushing forces, overheating, and overloading. Luckily, power failures due to disturbances like these can be predicted and/or prevented.Based on the success of internationally acclaimed computer programs, such as the authors' own RNM-3D, Engineering Electrodynamics: Electric Machine, Transformer, and Power Equipment Design explains how to implement industry-proven modeling and design techniques to solve complex electromagnetic phenomena. Considering recent progress in magneti

  5. Electric field engineering using quantum-size-effect-tuned heterojunctions

    KAUST Repository

    Adinolfi, V.

    2013-07-03

    A quantum junction solar cell architecture was recently reported that employs colloidal quantum dots (CQDs) on each side of the p-n junction. This architecture extends the range of design opportunities for CQD photovoltaics, since the bandgap can be tuned across the light-absorbing semiconductor layer via control over CQD size, employing solution-processed, room-temperature fabricated materials. We exploit this feature by designing and demonstrating a field-enhanced heterojunction architecture. We optimize the electric field profile within the solar cell through bandgap engineering, thereby improving carrier collection and achieving an increased open circuit voltage, resulting in a 12% improvement in power conversion efficiency.

  6. Electric power engineering education resources 1989-90; IEEE Power Engineering Committee Report

    Energy Technology Data Exchange (ETDEWEB)

    Wiitanen, D.O.; El-Hawary, M.E.; Grigg, C.; Gross, C.A.; King, R.L.; Stanek, E.K.; Talukdar, S.N.; Thomas, R.J.

    1992-11-01

    This paper is based on the eleventh biennial survey of power engineering education resources in the U.S. and Canada, nine of which have been previously published (1,2,3,4,5,6,7,8,9). This survey is conducted to determine the electric power engineering education resources available in ABET (Accreditation Board for Engineering and Technology) accredited engineering programs in the U.S. and Canada for the 1989-90 academic year. The report is limited to colleges and universities that reply to a questionnaire on a voluntary basis. For the 102 colleges and universities (94 U.S., 8 Canadian) that submitted data on their power programs, the report contains a list of faculty active during the 1989-90 academic year, their level of academic participation and professional experience.

  7. Summary of Research 2000: Department of Electrical and Computer Engineering

    Science.gov (United States)

    2001-12-01

    digital radio frequency memory ( DRFM ) technology. The second objective is to design, fabricate and test an all digital target-imaging device capable...Digital Radio Frequency Memories, DRFM ROBUST SYMMETRICAL NUMBER SYSTEMS Phillip E. Pace, Associate Professor David C. Jenn, Associate Professor Department...synthesizing the characteristic echo signature of a pre-selected target. The DIS has a digital radio frequency memory ( DRFM ) and associated circuitry, including

  8. 76 FR 64287 - Airworthiness Directives; General Electric Company CF34-10E Series Turbofan Engines

    Science.gov (United States)

    2011-10-18

    ... General Electric Company (GE) CF34-10E series turbofan engines. This proposed AD was ] prompted by a... This AD applies to General Electric Company (GE) CF34-10E series turbofan engines, serial number (S/N... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric...

  9. Professor Igor Yevseyev: In Memoriam Professor Igor Yevseyev: In Memoriam

    Science.gov (United States)

    2012-06-01

    Dear readers and authors, June 3, 2012 will mark five months since Professor Igor Yevseyev, Deputy Editor-in-Chief of both journals Laser Physics and Laser Physics Letters passed away, suddenly and unexpectedly. He was 67. Born in Moscow, he entered one of the world's best schools of physics, Moscow Engineering Physics Institute (MEPhI). With this renowned educational and research institution he bonded an alliance for his entire life, starting as an undergraduate student in the Department of Theoretical Physics and later continued as graduate student, assistant professor, associated professor, and full professor in the same department, a rare accomplishment of a person. All those years he retained the love of his life—the love for physics. He worked tirelessly as a teacher and scholar in this captivating field of knowledge. Professor Yevseyev was one of the founders of the international journal of Laser Physics in 1990, the first academic English language journal published in the former USSR. Later, in 2004, the second journal, Laser Physics Letters was brought to the forum of global laser physics community. The idea behind this new title was Professor Yevseyev's initiative to reach the readers and participants with new pioneering and break-through research results more rapidly. His leadership and indefatigable dedication to the quality of published materials made it possible that this journal reached international recognition in a few short years. Still, in order to attract even more attention of potential contributors and readers, Professor Yevseyev originally proposed to conduct the International Laser Physics Workshop (LPHYS) on the annual basis. Since 1992 the Workshop has been conducted every year, each year in a different country. As in all previous years, Professor Yevseyev was the key organizer of this year's workshop in Calgary, Canada. Sadly, this workshop will take place without him. Editorial Board

  10. Selected Aspects of Hydraulic Engineering : Liber Amicorum dedicated to Johannes Theodoor Thijsse, on occasion of his retirement as professor

    NARCIS (Netherlands)

    Thijsse, J.T.; Van Douwen, A.A.

    1963-01-01

    - Biography of Johannes Theodoor Thijsse - British Hydraulic Engineering and Research - Probleme der Donau in Österreich - Évolution, depuis trente ans, de la Normalisation Internationale des Mesures de Débits en Conduite - L' Association Internationale d'Hydrologie Scientifique - Activities of

  11. Principles and software realization of a multimedia course on theoretical electrical engineering based on enterprise technology

    OpenAIRE

    Penev Krasimir; Brandisky Kostadin

    2003-01-01

    The Department of Theoretical Electrical Engineering (TEE) of Technical University of Sofia has been developing interactive enterprise-technologies based course on Theoretical Electrical Engineering. One side of the project is the development of multimedia teaching modules for the core undergraduate electrical engineering courses (Circuit Theory and Electromagnetic Fields) and the other side is the development of Software Architecture of the web site on which modules are deployed. Initial eff...

  12. International symposium on Electron-magnetic fields in mechatronics, electrical and electronique engineering

    CERN Document Server

    Krawczyk, Andrzej; Dolezel, Ivo

    2008-01-01

    Includes contributions on electromagnetic fields in electrical engineering which intends at joining theory and practice. This book helps the world-wide electromagnetic community, both academic and engineering, in understanding electromagnetism itself and its application to technical problems.

  13. Engineering and Design: Reliability Analysis of Navigation Lock and Dam Mechanical and Electrical Equipment

    National Research Council Canada - National Science Library

    Beranek, Dwight

    2001-01-01

    This engineer technical letter (ETL) provides guidance for assessing the reliability of mechanical and electrical systems of navigation locks and dams and for establishing an engineering basis for major rehabilitation investment decisions...

  14. The Electrical Engineering Curriculum at the Technical University of Denmark - Options in Microelectronics

    DEFF Research Database (Denmark)

    Bruun, Erik; Nielsen, Lars Drud

    1997-01-01

    This paper describes the modular structure of the engineering curriculum at the Technical University of Denmark. The basic requirements for an electrical engineering curriculum are presented and different possibilities for specialization in microelectronics and integrated circuit design...

  15. Selected Topics in Nonlinear Dynamics and Theoretical Electrical Engineering

    CERN Document Server

    Halang, Wolfgang; Mathis, Wolfgang; Chedjou, Jean; Li, Zhong

    2013-01-01

    This book contains a collection of recent advanced contributions in the field of nonlinear dynamics and synchronization, including selected applications in the area of theoretical electrical engineering. The present book is divided into twenty-one chapters grouped in five parts. The first part focuses on theoretical issues related to chaos and synchronization and their potential applications in mechanics, transportation, communication and security. The second part handles dynamic systems modelling and simulation with special applications to real physical systems and phenomena. The third part discusses some fundamentals of electromagnetics (EM) and addresses the modelling and simulation in some real physical electromagnetic scenarios. The fourth part mainly addresses stability concerns. Finally, the last part assembles some sample applications in the area of optimization, data mining, pattern recognition and image processing.

  16. Selected topics in nonlinear dynamics and theoretical electrical engineering

    CERN Document Server

    Halang, Wolfgang; Mathis, Wolfgang; Chedjou, Jean; Li, Zhong

    2013-01-01

    This book contains a collection of recent advanced contributions in the field of nonlinear dynamics and synchronization, including selected applications in the area of theoretical electrical engineering. The present book is divided into twenty-one chapters grouped in five parts. The first part focuses on theoretical issues related to chaos and synchronization and their potential applications in mechanics, transportation, communication and security. The second part handles dynamic systems modelling and simulation with special applications to real physical systems and phenomena. The third part discusses some fundamentals of electromagnetics (EM) and addresses the modelling and simulation in some real physical electromagnetic scenarios. The fourth part mainly addresses stability concerns. Finally, the last part assembles some sample applications in the area of optimization, data mining, pattern recognition and image processing.

  17. (School of Electrical Engineering of Purdue University): Annual research summary, July 1, 1988--June 30, 1989

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This document summarizes the research activities within the School of Electrical Engineering of Purdue University. It is intended as a reference document for colleagues, prospective graduate students and organizations interested in electrical engineering research. The research activities of Part I are organized according to ten areas. The first eight of these are areas in which the Purdue Electrical Engineering graduate program is divided for administrative purposes. The ten areas are: automatic controls; electromagnetic fields; bioengineering; energy source and systems; circuit theory; solid state devices and materials; communications and signal processing; engineering education; and computer engineering.

  18. Electrical Engineering in Los Alamos Neutron Science Center Accelerator

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Michael James [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-11-30

    The field of electrical engineering plays a significant role in particle accelerator design and operations. Los Alamos National Laboratories LANSCE facility utilizes the electrical energy concepts of power distribution, plasma generation, radio frequency energy, electrostatic acceleration, signals and diagnostics. The culmination of these fields produces a machine of incredible potential with uses such as isotope production, neutron spallation, neutron imaging and particle analysis. The key isotope produced in LANSCE isotope production facility is Strontium-82 which is utilized for medical uses such as cancer treatment and positron emission tomography also known as PET scans. Neutron spallation is one of the very few methods used to produce neutrons for scientific research the other methods are natural decay of transuranic elements from nuclear reactors. Accelerator produce neutrons by accelerating charged particles into neutron dense elements such as tungsten imparting a neutral particle with kinetic energy, this has the benefit of producing a large number of neutrons as well as minimizing the waste generated. Utilizing the accelerator scientist can gain an understanding of how various particles behave and interact with matter to better understand the natural laws of physics and the universe around us.

  19. Primary electric power generation systems for advanced-technology engines

    Science.gov (United States)

    Cronin, M. J.

    1983-01-01

    The advantages of the all electric airplane are discussed. In the all electric airplane the generator is the sole source of electric power; it powers the primary and secondary flight controls, the environmentals, and the landing gear. Five candidates for all electric power systems are discussed and compared. Cost benefits of the all electric airplane are discussed.

  20. Teaching professional development of science and engineering professors at a research-extensive university: Motivations, meaningfulness, obstacles, and effects

    Science.gov (United States)

    Bouwma-Gearhart, Jana

    There is a national movement to improve undergraduate science, technology, engineering, and mathematics (STEM) education. Given the percentage of academics teaching and training at research institutions, there is a parallel movement to improve the quality of teaching-focused professional development for practicing and future STEM educators at these institutions. While research into the effectiveness of teaching professional development at the postsecondary level has increased over the last 40 years, little attention has been paid to understanding faculty perceptions regarding what constitutes effective teaching professional development. Less is known about how to best meet the needs of STEM faculty at research universities and why, given that they are seldom required to engage in teaching professional development, they bother to participate at all. The higher education research community must develop theory grounded in the knowledge and practical experiences of the faculty engaged in teaching professional development. I have studied what motivates twelve research university science and engineering faculty to engage in teaching professional development in light of local supports and barriers and the resulting value of their participation. I have interpreted the experiences of my research participants to indicate that they were motivated to engage in teaching professional development to fulfill a need to bring their teaching competencies in better concordance with their professional strengths as researchers. Once engaged, my research participants increased their teaching competence and achieved more autonomy with respect to their professional practice. As they continued to engage, they internalized the values and practices associated with effective teaching professional development and adopted the commitment to continually problematize their teaching practice as more of their own. My research participants attempted to transfer their revised stance regarding teaching

  1. Naval Academy: Low Grades in Electrical Engineering Courses Surface Broader Issues. Report to Congressional Requesters.

    Science.gov (United States)

    General Accounting Office, Washington, DC. National Security and International Affairs Div.

    This report discusses findings of a study of two issues during the 1989-90 academic year at the United States Naval Academy: the removal of the Chairman of the Electrical Engineering Department, and the Superintendent's decision to give a final electrical engineering examination that might have been compromised. The study reviewed the effect of…

  2. Electrical Engineers' Perceptions on Education--Electromagnetic Field Theory and Its Connection to Working Life

    Science.gov (United States)

    Keltikangas, K.; Wallen, H.

    2010-01-01

    This paper investigates electrical engineers' perceptions on their education in Finland, with particular emphasis on the basic electromagnetic field theory courses and their applicability in working life, using two online surveys (n = 99 and n = 120). The answers show a reasonably good satisfaction with the electrical engineering studies in…

  3. Investigating Student Motivation and Performance in Electrical Engineering and Its Subdisciplines

    Science.gov (United States)

    Foley, Justin M.; Daly, Shanna; Lenaway, Catherine; Phillips, Jamie

    2016-01-01

    Factors influencing choice of major in electrical engineering and later curricular and professional choices are investigated. Studies include both quantitative and qualitative analyses via student transcripts, surveys, and focus groups. Student motivation for choosing an electrical engineering major and later subdiscipline in the field is…

  4. 75 FR 77570 - Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines

    Science.gov (United States)

    2010-12-13

    ...) for General Electric (GE) CF6-45/-50 series and CF6-80A series turbofan engines with certain part... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company CF6 Series Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of...

  5. 77 FR 42677 - Special Conditions: General Electric CT7-2E1 Turboshaft Engine

    Science.gov (United States)

    2012-07-20

    ... Federal Aviation Administration 14 CFR Part 33 Special Conditions: General Electric CT7-2E1 Turboshaft Engine AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed special conditions. SUMMARY: This action proposes special conditions for the General Electric CT7-2E1 engine model. This...

  6. 77 FR 3070 - Electric Engineering, Architectural Services, Design Policies and Construction Standards

    Science.gov (United States)

    2012-01-23

    ... 3070-3073] [FR Doc No: 2012-1157] DEPARTMENT OF AGRICULTURE Rural Utilities Service 7 CFR Parts 1724 and 1726 RIN 0572-AC20 Electric Engineering, Architectural Services, Design Policies and Construction...--ELECTRIC ENGINEERING, ARCHITECTURAL SERVICES AND DESIGN POLICIES AND PROCEDURES 0 1. The authority citation...

  7. Micro- and Macroscale Ideas of Current among Upper-Division Electrical Engineering Students

    Science.gov (United States)

    Adam, Gina C.; Harlow, Danielle B.; Lord, Susan M.; Kautz, Christian H.

    2017-01-01

    The concept of electric current is fundamental in the study of electrical engineering (EE). Students are often exposed to this concept in their daily lives and early in middle school education. Lower-division university courses are usually limited to the study of passive electronic devices and simple electric circuits. Semiconductor physics is an…

  8. Stationary diesel engines for use with generators to supply electric power

    Science.gov (United States)

    1977-01-01

    The procurement of stationary diesel engines for on-site generation of electric power deals with technical criteria and policy relating to federal agency, not electrical components of diesel-generator sets or for the design of electric-power generating plants or their air-pollution or noise control equipment.

  9. Advanced knowledge engineering techniques with applications to electric power systems

    Energy Technology Data Exchange (ETDEWEB)

    Liu, C.-C.; Marathe, H.; Ma, T.-K.; Rosenwald, G.

    1997-12-31

    This chapter starts with a brief overview of the state-of-the-art of expert system applications to electric power systems. Several knowledge engineering techniques that were motivated by power system applications are reviewed: (1) identification of relations among rules or chains of rules, (2) estimation of the worst case processing time of rule-based systems, and (3) the equivalence class method for validation and verification of rule-based systems. The first issue, relation checking, is considered the most practical among the three and, therefore, the subject is discussed extensively in this chapter. A general relation checking algorithm developed at the University of Washington is described. A representation of rule-based systems in the attribute space is proposed. This representation is used to define several relations among rules. The relations defined are cause-effect, mutual exclusion, redundancy, conflict, subsumption and implication. A relation between a rule and a chain of rules is either complete, i.e. the relation holds for all instantiations of the rules, or partial, i.e. the relation holds only for some instantiations of the rules. An algorithm to detect relations between a new rule (to be added to the rule base) and rules in the rule base is developed. Example applications of this algorithm to rule-based systems are provided. (Author)

  10. 77 FR 10950 - Airworthiness Directives; General Electric Company (GE) Turbofan Engines

    Science.gov (United States)

    2012-02-24

    ...-27-AD; Amendment 39-16961; AD 2012-04-05] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule... engines. That AD currently requires installing software version 8.2.Q1 to the engine electronic control...

  11. 76 FR 68634 - Airworthiness Directives; General Electric Company (GE) CF6 Turbofan Engines

    Science.gov (United States)

    2011-11-07

    ...-04] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) CF6 Turbofan Engines AGENCY... airworthiness directive (AD) for the engines identified above. That AD currently requires initial and repetitive visual inspections of the forward engine mount assembly side links for cracks, stripping and reapplying...

  12. Roles of emeriti professors

    OpenAIRE

    Thody, Angela

    2008-01-01

    Emeritus Professor Angela Thody commenced a study of emeriti professors in 2006 when she herself had become an emeritus in 2003 and was seeking to establish an Association for emeriti at her university at Lincoln. By 2008, the literature review was finished and a pilot study of emeriti professors at Leicester University was underway. This presentation was one of several to the University of Lincoln's College of Professors to encourage their support for the formation of the association and to ...

  13. PROFESSOR ENSERMU KELBESSA

    African Journals Online (AJOL)

    2016-08-14

    Aug 14, 2016 ... University, Sweden in 1990. Although still very young, Professor Ensermu Kelbessa joined the Addis Ababa. University's Biology Department as a graduate assistant in 1979. He then went on to serve the university in various positions including: Lecturer, Assistant Professor, Associate. Professor and, finally ...

  14. Engine-start Control Strategy of P2 Parallel Hybrid Electric Vehicle

    Science.gov (United States)

    Xiangyang, Xu; Siqi, Zhao; Peng, Dong

    2017-12-01

    A smooth and fast engine-start process is important to parallel hybrid electric vehicles with an electric motor mounted in front of the transmission. However, there are some challenges during the engine-start control. Firstly, the electric motor must simultaneously provide a stable driving torque to ensure the drivability and a compensative torque to drag the engine before ignition. Secondly, engine-start time is a trade-off control objective because both fast start and smooth start have to be considered. To solve these problems, this paper first analyzed the resistance of the engine start process, and established a physic model in MATLAB/Simulink. Then a model-based coordinated control strategy among engine, motor and clutch was developed. Two basic control strategy during fast start and smooth start process were studied. Simulation results showed that the control objectives were realized by applying given control strategies, which can meet different requirement from the driver.

  15. Dynamics and control of Stirling engines in a 15 kWe solar electric generation concept

    Science.gov (United States)

    Das, R. L.; Bahrami, K. A.

    1979-01-01

    This paper discusses the application of kinematic and free piston Stirling engines in a 15 kWe dish-electric approach for solar thermal electric generation. Initially, the principle of operation of Stirling engines in solar thermal electric generation is discussed. Then, under certain simplifying assumptions, mathematical models describing the dynamic operation of the kinematic and free piston Stirling engines are developed. It is found that the engine dynamics may be approximated by second order models. Control mechanisms for both types of Stirling engines are discussed. An approach based on the modulation of the working fluid mean pressure is presented. It is concluded that this approach offers a fast and effective means of control. The free piston Stirling engine, being a thermally driven mechanical oscillator, presents unique control requirements. These are discussed in this paper.

  16. XI Scientific Conference Selected Issues of Electrical Engineering and Electronics (WZEE)

    CERN Document Server

    Mazur, Damian; Analysis and Simulation of Electrical and Computer Systems

    2015-01-01

    This book presents the selected results of the XI Scientific Conference Selected Issues of Electrical Engineering and Electronics (WZEE) which was held in Rzeszów and Czarna, Poland on September 27-30, 2013. The main aim of the Conference was to provide academia and industry to discuss and present the latest technological advantages and research results and to integrate the new interdisciplinary scientific circle in the field of electrical engineering, electronics and mechatronics. The Conference was organized by the Rzeszów Division of Polish Association of Theoretical and Applied Electrical Engineering (PTETiS) in cooperation with Rzeszów University of Technology, the Faculty of Electrical and Computer Engineering and Rzeszów University, the Faculty of Mathematics and Natural Sciences.  

  17. Electrical engineering support of telemetered traffic monitoring sites : final report, March 2009.

    Science.gov (United States)

    2009-03-01

    "The aim of this project was to provide electrical engineering support for the telemetered traffic monitoring sites (TTMS) operated by the Statistics Office of the Florida Department of Transportation. This project was a companion to project BD-543-1...

  18. Parallel Hybrid Gas-Electric Geared Turbofan Engine Conceptual Design and Benefits Analysis

    Science.gov (United States)

    Lents, Charles; Hardin, Larry; Rheaume, Jonathan; Kohlman, Lee

    2016-01-01

    The conceptual design of a parallel gas-electric hybrid propulsion system for a conventional single aisle twin engine tube and wing vehicle has been developed. The study baseline vehicle and engine technology are discussed, followed by results of the hybrid propulsion system sizing and performance analysis. The weights analysis for the electric energy storage & conversion system and thermal management system is described. Finally, the potential system benefits are assessed.

  19. Professor Volker Claus: vom o. Professor zum e-Professor

    Science.gov (United States)

    Gunzenhäuser, Rul; Taras, Christiane; Wörner, Michael

    Der Beitrag würdigt das Wirken von Professor Claus auf Gebieten des rechnerunterstützten Lehrens. Dabei wird ein Bogen von den frühen Systemen des rechnerunterstützten Lehrens über moderne Lernplattformen im Internet zu neuen Anwendungen web-basierter Systeme für das lebenslange Lehren und Lernen gespannt.

  20. Introducing Creativity in a Design Laboratory for a Freshman Level Electrical and Computer Engineering Course

    Science.gov (United States)

    Burkett, Susan L.; Kotru, Sushma; Lusth, John C.; McCallum, Debra; Dunlap, Sarah

    2014-01-01

    Dunlap, The University of Alabama, USA ABSTRACT In the electrical and computer engineering (ECE) curriculum at The University of Alabama, freshmen are introduced to fundamental electrical concepts and units, DC circuit analysis techniques, operational amplifiers, circuit simulation, design, and professional ethics. The two credit course has both…

  1. Starting the aircraft engines and gas-turbine drive by means of electric starter

    Directory of Open Access Journals (Sweden)

    І.М. Іщенко

    2004-04-01

    Full Text Available  In the article the questions of the starting the aircraft engines and gas-turbine drive by means of electric starter is considered. In the same way in the article are determined the main requirements to steady-state converter for feeding electric starter.

  2. Theory of semiconductor junction devices a textbook for electrical and electronic engineers

    CERN Document Server

    Leck, J H

    1967-01-01

    Theory of Semiconductor Junction Devices: A Textbook for Electrical and Electronic Engineers presents the simplified numerical computation of the fundamental electrical equations, specifically Poisson's and the Hall effect equations. This book provides the fundamental theory relevant for the understanding of semiconductor device theory. Comprised of 10 chapters, this book starts with an overview of the application of band theory to the special case of semiconductors, both intrinsic and extrinsic. This text then describes the electrical properties of conductivity, semiconductors, and Hall effe

  3. 19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

  4. Embedding Academic Literacy Support within the Electrical Engineering Curriculum: A Case Study

    Science.gov (United States)

    Skinner, I.; Mort, P.

    2009-01-01

    This paper reports the integration of supplementary training in academic literacy, for those without the assumed entry standard, into a standard electrical engineering program without compromising any other educational objectives. All students who commenced an engineering degree were tested as part of their first session's assessment activities.…

  5. Implementation of a Multidisciplinary Professional Skills Course at an Electrical Engineering School

    Science.gov (United States)

    Gider, F.; Likar, B.; Kern, T.; Miklavcic, D.

    2012-01-01

    This paper describes a case study of an innovative approach to teaching at an engineering school. The postgraduate course "Project Work and Communication in Research and Development (R&D)" was developed at the Faculty of Electrical Engineering of the University of Ljubljana, Ljubljana, Slovenia. The main aim of the course was to make…

  6. Reengineering Electrical Engineering Undergraduate Laboratories at Escola Politecnica, University of Sao Paulo.

    Science.gov (United States)

    Seabra, Antonio C.; Consonni, Denise

    Brazilian engineering schools are under a strict program to reengineer their courses with the financial support of the federal agencies. At the electronic engineering department at the University of Sao Paulo, this process started by modifying the Basic Electricity and Electronic Laboratories. This paper describes the new structure of these labs…

  7. A Successful Experience of ABET Accreditation of an Electrical Engineering Program

    Science.gov (United States)

    Al-Yahya, S. A.; Abdel-Halim, M. A.

    2013-01-01

    The procedures followed and the various factors that led to the ABET accreditation of the College of Engineering, Qassim University, Buraidah, Saudi Arabia, are illustrated and evaluated for the benefit of other similar colleges. Taking the Electrical Engineering (EE) program as an example, this paper describes the procedures followed to implement…

  8. An Innovative Project and Design Oriented Electrical Engineering Curriculum at the University of North Texas

    Science.gov (United States)

    Garcia, Oscar N.; Varanasi, Murali R.; Acevedo, Miguel F.; Guturu, Parthasarathy

    2011-01-01

    We analyze and study the beginning of a new Electrical Engineering Department, supported by an NSF Departmental Level Reform award, within a new College of Engineering in the 21st Century and also describe the academic approach and influences of an innovative cognitive-based approach to curriculum development. In addition, the approach taken…

  9. 77 FR 12444 - Airworthiness Directives; General Electric Company (GE) Turbofan Engines

    Science.gov (United States)

    2012-03-01

    ...-09-AD; Amendment 39-16954; AD 2012-03-12] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for all GE CF6-80C2 model turbofan engines...

  10. Competencies of BSc and MSc programmes in electrical engineering and student portfolios

    NARCIS (Netherlands)

    Mouthaan, A.J.; Brink, R.W.; Vos, Henk

    2002-01-01

    General goals of a BSc and MSc in electrical engineering are formulated, leading to a 'mission' statement clarifying the rationale behind the programmes in relation to the needs of society. These goals are made operational in terms of competencies that engineers educated through our programmes are

  11. Microprocessors in U.S. Electrical Engineering Departments, 1974-1975.

    Science.gov (United States)

    Sloan, M. E.

    Drawn from a survey of engineering departments known to be teaching microprocessor courses, this paper shows that the adoption of microprocessors by Electrical Engineering Departments has been rapid compared with their adoption of minicomputers. The types of courses that are being taught can be categorized as: surveys of microprocessors, intensive…

  12. System engineering of a nuclear electric propulsion testbed spacecraft

    Science.gov (United States)

    Cameron, G. E.; Herbert, G. A.

    1993-06-01

    A mission concept aimed at evaluating performance of a Russian Space Nuclear Power System (SNPS) and electric thrusters to be consistent with U.S. safety standards is discussed. Solutions of unique nuclear electric propulsion (NEP) problems optimized for the Nuclear Electric Propulsion Test Program (NEPSTP) are considered. The problems include radiation, thermal management, safety, ground processing concerns of a nuclear payload, the launch of an NEP payload, orbital operations, electromagnetic compatibility, contamination, guidance and control, and a power system. Attention is also given to preliminary spacecraft and mission design developed taking into account all aforementioned problems.

  13. Application of conductive polymers, scaffolds and electrical stimulation for nerve tissue engineering.

    Science.gov (United States)

    Ghasemi-Mobarakeh, Laleh; Prabhakaran, Molamma P; Morshed, Mohammad; Nasr-Esfahani, Mohammad Hossein; Baharvand, Hossein; Kiani, Sahar; Al-Deyab, Salem S; Ramakrishna, Seeram

    2011-04-01

    Among the numerous attempts to integrate tissue engineering concepts into strategies to repair nearly all parts of the body, neuronal repair stands out. This is partially due to the complexity of the nervous anatomical system, its functioning and the inefficiency of conventional repair approaches, which are based on single components of either biomaterials or cells alone. Electrical stimulation has been shown to enhance the nerve regeneration process and this consequently makes the use of electrically conductive polymers very attractive for the construction of scaffolds for nerve tissue engineering. In this review, by taking into consideration the electrical properties of nerve cells and the effect of electrical stimulation on nerve cells, we discuss the most commonly utilized conductive polymers, polypyrrole (PPy) and polyaniline (PANI), along with their design and modifications, thus making them suitable scaffolds for nerve tissue engineering. Other electrospun, composite, conductive scaffolds, such as PANI/gelatin and PPy/poly(ε-caprolactone), with or without electrical stimulation, are also discussed. Different procedures of electrical stimulation which have been used in tissue engineering, with examples on their specific applications in tissue engineering, are also discussed. Copyright © 2011 John Wiley & Sons, Ltd.

  14. The record of electrical and communication engineering conversazione Tohoku University Volume 63, No. 3

    Science.gov (United States)

    1995-05-01

    English abstracts contained are from papers authored by the research staff of the Research Institute of Electrical Communication and the departments of Electrical Engineering, Electrical Communications, Electronic Engineering, and Information Engineering, Tohoku University, which originally appeared in scientific journals in 1994. The abstracts are organized under the following disciplines: electromagnetic theory; physics; fundamental theory of information; communication theory and systems; signal and image processing; systems control; computers; artificial intelligence; recording; acoustics and speech; ultrasonic electronics; antenna, propagation, and transmission; optoelectronics and optical communications; quantum electronics; superconducting materials and applications; magnetic materials and magnetics; semiconductors; electronic materials and parts; electronic devices and integrated circuits; electronic circuits; medical electronics and bionics; measurements and applied electronics; electric power; and miscellaneous.

  15. Principles and software realization of a multimedia course on theoretical electrical engineering based on enterprise technology

    Directory of Open Access Journals (Sweden)

    Penev Krasimir

    2003-01-01

    Full Text Available The Department of Theoretical Electrical Engineering (TEE of Technical University of Sofia has been developing interactive enterprise-technologies based course on Theoretical Electrical Engineering. One side of the project is the development of multimedia teaching modules for the core undergraduate electrical engineering courses (Circuit Theory and Electromagnetic Fields and the other side is the development of Software Architecture of the web site on which modules are deployed. Initial efforts have been directed at the development of multimedia modules for the subject Electrical Circuits and on developing the web site structure. The objective is to develop teaching materials that will enhance lectures and laboratory exercises and will allow computerized examinations on the subject. This article outlines the framework used to develop the web site structure, the Circuit Theory teaching modules, and the strategy of their use as teaching tool.

  16. A segmented ion engine design for solar electric propulsion systems

    Science.gov (United States)

    Brophy, John R.

    1992-01-01

    A new ion engine design, called a segmented ion engine, is described which is capable of reducing the required ion source life time for small body rendezvous missions from 18,000 h to about 8,000 h. The use of SAND ion optics for the engine accelerator system makes it possible to substantially reduce the cost of demonstrating the required engine endurance. It is concluded that a flight test of a 5-kW xenon ion propulsion system on the ELITE spacecraft would enormously reduce the cost and risk of using ion propulsion on a planetary vehicle by addressing systems level issues associated with flying a spacecraft radically different from conventional planetary vehicles.

  17. A Professor's Work.

    Science.gov (United States)

    Melko, Matthew

    This book describes a year-long participant-observer case study of the professorship as a profession. Following an introductory chapter, each chapter examines one aspect of the professor's occupation by recounting the specific experiences of the author, a sociology professor at Wright State University (Ohio). Chapter 2 looks at the department as…

  18. The performance of solar thermal electric power systems employing small heat engines

    Science.gov (United States)

    Pons, R. L.

    1980-02-01

    The paper presents a comparative analysis of small (10 to 100 KWe) heat engines for use with a solar thermal electric system employing the point-focusing, distributed receiver (PF-DR) concept. Stirling, Brayton, and Rankine cycle engines are evaluated for a nominal overall system power level of 1 MWe, although the concept is applicable to power levels up to at least 10 MWe. Multiple concentrators are electrically connected to achieve the desired plant output. Best performance is achieved with the Stirling engine, resulting in a system Levelized Busbar Energy Cost of just under 50 mills/kWH and a Capital Cost of $900/kW, based on the use of mass-produced components. Brayton and Rankine engines show somewhat less performance but are viable alternatives with particular benefits for special applications. All three engines show excellent performance for the small community application.

  19. The performance of solar thermal electric power systems employing small heat engines

    Science.gov (United States)

    Pons, R. L.

    1980-01-01

    The paper presents a comparative analysis of small (10 to 100 KWe) heat engines for use with a solar thermal electric system employing the point-focusing, distributed receiver (PF-DR) concept. Stirling, Brayton, and Rankine cycle engines are evaluated for a nominal overall system power level of 1 MWe, although the concept is applicable to power levels up to at least 10 MWe. Multiple concentrators are electrically connected to achieve the desired plant output. Best performance is achieved with the Stirling engine, resulting in a system Levelized Busbar Energy Cost of just under 50 mills/kWH and a Capital Cost of $900/kW, based on the use of mass-produced components. Brayton and Rankine engines show somewhat less performance but are viable alternatives with particular benefits for special applications. All three engines show excellent performance for the small community application.

  20. NASA/General Electric Engine Component Improvement Program

    Science.gov (United States)

    Albright, A. J.; Lennard, D. J.; Ziemianski, J. A.

    1978-01-01

    The Engine Component Improvement (ECI) Program has been initiated in connection with projects designed to reduce the impact of the world-wide energy crisis in the area of aviation. The two parts of the ECI program have the overall objective to identify and quantify the sources and causes of CF6 engine performance deterioration, and to reduce the fuel consumption of CF6 engines through the development and the incorporation of various performance improvement concepts. The CF6 high-bypass turbofan engine was selected as a basis for this effort, since it is expected to be a significant fuel user in commercial revenue service for the next 15 to 20 years. The first part of the ECI program represents the initial step in an effort to achieve a goal of five percent reduction in fuel usage for CF6 engines in the 1979-82 time period. The first performance improvement concept selected is an improved efficiency fan blade. Other improvements are related to a short core exhaust system and an improved high pressure turbine.

  1. use of hot air engine to generate electricity from biogas

    African Journals Online (AJOL)

    Mgina

    designed to convert chemical energy of biogas to electricity was considered to be the most suitable technology for this purpose. In view of this, the .... example wind turbines of about 100 W to. 300 W have also been found feasible in. China ... selection because the loss is the penalty on efficiency and the specific power of the.

  2. 76 FR 64291 - Airworthiness Directives; General Electric Company (GE) Turbofan Engines

    Science.gov (United States)

    2011-10-18

    ...-09-AD RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) Turbofan Engines AGENCY...-80C2B7F, CF6-80C2B8F, CF6- 80C2D1F, CF6-80C2K1F, and CF6-80C2L1F turbofan engines, including engines marked on the engine data plate as CF6-80C2B7F1. This proposed AD was prompted by a report of a supplier...

  3. An active learning organisation: teaching projects in electrical engineering education

    NARCIS (Netherlands)

    Christensen, H.-P.; Vos, Henk; de Graaff, E.; Lemoult, B.

    2004-01-01

    The introduction of active learning in engineering education is often started by enthusiastic teachers or change agents. They usually encounter resistance from stakeholders such as colleagues, department boards or students. For a successful introduction these stakeholders all have to learn what

  4. Use of electrical resistivity technique for engineering site investigation

    African Journals Online (AJOL)

    The presence of moderately thick (1.5 – 16.5m) clay has been established in this area; therefore the use of raft foundation and/or any other foundation that is commensurate with civil engineering standard is suggested for high rise structures. Keywords: bedrock integrity, transverse unit resistance, foundation. Global Journal ...

  5. use of hot air engine to generate electricity from biogas

    African Journals Online (AJOL)

    Mgina

    air engine unable to meet these energy demands despite its known potential. Energy Supply in Rural Areas. Currently renewable energies such as solar, wind and biogas can be harnessed for rural applications in Tanzania. For example in rural China Photovoltaic (PV) of about 60. W to 120 W and PV/wind hybrids of about.

  6. Advanced control for airbreathing engines, volume 2: General Electric aircraft engines

    Science.gov (United States)

    Bansal, Indar

    1993-01-01

    The application of advanced control concepts to air breathing engines may yield significant improvements in aircraft/engine performance and operability. Screening studies of advanced control concepts for air breathing engines were conducted by three major domestic aircraft engine manufacturers to determine the potential impact of concepts on turbine engine performance and operability. The purpose of the studies was to identify concepts which offered high potential yet may incur high research and development risk. A target suite of proposed advanced control concepts was formulated and evaluated in a two phase study to quantify each concept's impact on desired engine characteristics. To aid in the evaluation specific aircraft/engine combinations were considered: a Military High Performance Fighter mission, a High Speed Civil Transport mission, and a Civil Tiltrotor mission. Each of the advanced control concepts considered in the study are defined and described. The concept potential impact on engine performance was determined. Relevant figures of merit on which to evaluate the concepts are determined. Finally, the concepts are ranked with respect to the target aircraft/engine missions. A final report describing the screening studies was prepared by each engine manufacturer. Volume 2 of these reports describes the studies performed by GE Aircraft Engines.

  7. The performance simulation of single cylinder electric power confined piston engine

    Science.gov (United States)

    Gou, Yanan

    2017-04-01

    A new type of power plant. i.e, Electric Power Confined Piston Engine, is invented by combining the free piston engine and the crank connecting rod mechanism of the traditional internal combustion engine. Directly using the reciprocating movement of the piston, this new engine converts the heat energy produced by fuel to electrical energy and output it. The paper expounds the working mechanism of ECPE and establishes the kinematics and dynamics equations. Furthermore, by using the analytic method, the ECPE electromagnetic force is solved at load cases. Finally, in the simulation environment of MARLAB, the universal characteristic curve is obtained in the condition of rotational speed n between 1000 r/min and 2400 r/min, throttle opening α between 30% and 100%.

  8. EDUCATIONAL COMPLEX ON ELECTRICAL ENGINEERING AND ELECTRONICS BASED ON MODELING IN PROGRAM TINA

    Directory of Open Access Journals (Sweden)

    Vladimir A. Alekhin

    2014-01-01

    Full Text Available The educational complex on the electrical engineering and electronics has been developed. It contains a course of lectures and lecture notes in the electronic form, a new computer laboratory practical work and practical training. All electronic manuals are based on modeling of electric and electronic circuits in the new effective program TINA. The educational complex is being successfully used in educational process on internal and distant learning. 

  9. Elementary mathematical and computational tools for electrical and computer engineers using Matlab

    CERN Document Server

    Manassah, Jamal T

    2013-01-01

    Ideal for use as a short-course textbook and for self-study Elementary Mathematical and Computational Tools for Electrical and Computer Engineers Using MATLAB fills that gap. Accessible after just one semester of calculus, it introduces the many practical analytical and numerical tools that are essential to success both in future studies and in professional life. Sharply focused on the needs of the electrical and computer engineering communities, the text provides a wealth of relevant exercises and design problems. Changes in MATLAB's version 6.0 are included in a special addendum.

  10. 75 FR 21161 - Airworthiness Directives; General Electric Company (GE) CJ610 Series Turbojet Engines and CF700...

    Science.gov (United States)

    2010-04-23

    ...-02-AD; Amendment 39-16273; AD 2010-09-08] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) CJ610 Series Turbojet Engines and CF700 Series Turbofan Engines AGENCY: Federal Aviation...) for GE CJ610 series turbojet engines and CF700 turbofan engines with AFT Technologies combustion...

  11. Progress of the Computer-Aided Engineering of Electric Drive Vehicle Batteries (CAEBAT) (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Pesaran, A. A.; Han, T.; Hartridge, S.; Shaffer, C.; Kim, G. H.; Pannala, S.

    2013-06-01

    This presentation, Progress of Computer-Aided Engineering of Electric Drive Vehicle Batteries (CAEBAT) is about simulation and computer-aided engineering (CAE) tools that are widely used to speed up the research and development cycle and reduce the number of build-and-break steps, particularly in the automotive industry. Realizing this, DOE?s Vehicle Technologies Program initiated the CAEBAT project in April 2010 to develop a suite of software tools for designing batteries.

  12. Adopting Problem-Based Learning Model for AN Electrical Engineering Curriculum

    Science.gov (United States)

    Khan, Mohamed Khan Aftab Ahmed; Sinnadurai, Rajendran; Amudha, M.; Elamvazuthi, I.; Vasant, P.

    2010-06-01

    The shortage of highly qualified academicians in a knowledge-based economy and potential benefits of Problem-Based Learning (PBL) approach has necessitated the adoption of PBL in many areas of education. This paper discusses a PBL experience for an electrical engineering undergraduate course. Some preliminary experiences of implementing them are described and discussed. It was found that PBL approach seem to be an efficient strategy not only for undergraduate engineering education but also for instilling lifelong learning.

  13. Research Capabilities Directed to all Electric Engineering Teachers, from an Alternative Energy Model

    Directory of Open Access Journals (Sweden)

    Víctor Hugo Ordóñez Navea

    2017-08-01

    Full Text Available The purpose of this work was to contemplate research capabilities directed to all electric engineering teachers from an alternative energy model intro the explanation of a semiconductor in the National Training Program in Electricity. Some authors, such as. Vidal (2016, Atencio (2014 y Camilo (2012 point out to technological applications with semiconductor electrical devices. In this way; a diagnostic phase is presented, held on this field research as a descriptive type about: a how to identify the necessities of alternative energies, and b The research competences in the alternatives energies of researcher from a solar cell model, to boost and innovate the academic praxis and technologic ingenuity. Themselves was applied a survey for a group of 15 teachers in the National Program of Formation in electricity to diagnose the deficiencies in the research area of alternatives energies. The process of data analysis was carried out through descriptive statistic. Later the conclusions are presented the need to generate strategies for stimulate and propose exploration of alternatives energies to the development of research competences directed to the teachers of electrical engineering for develop the research competences in the enforcement of the teachers exercise for the electric engineering, from an alternative energy model and boost the technologic research in the renewal energies field.

  14. Professor Martin Hairer

    Directory of Open Access Journals (Sweden)

    Martine Barons

    2015-09-01

    Full Text Available Professor Martin Hairer was one of four recipients of the 2014 Fields Medal, widely viewed as the highest honour a mathematician can receive. He is currently Regius Professor of Mathematics in the Mathematics Department at the University of Warwick. Professor Hairer has contributed significantly to the field of stochastic partial differential equations (SPDEs, which engages with interdisciplinary approaches to mathematics and physics. He has enjoyed great success communicating mathematics to a range of audiences and has also developed music editing software.In this interview, early career mathematicians, Dr Martine Barons (MJB and Dr Paul Chleboun ask Professor Hairer (MH about how his interest in mathematics developed; the awards ceremony where he received the Fields Medal; Amadeus Pro, the music software he developed and continues to maintain; and the challenges of engaging a sceptical and sometimes critical public as a mathematician.

  15. Dictionary of electrical engineering. Power engineering, automation technology, measurement and control technology, mechatronics. English - German; Fachwoerterbuch Elektrotechnik. Energietechnik, Automatisierungstechnik, Mess-, Steuer- und Regelungstechnik, Mechatronik. Englisch - Deutsch

    Energy Technology Data Exchange (ETDEWEB)

    Heckler, H.

    2007-07-01

    The foreign-language vocabulary taught at school usually does not cover terms needed during professional life in electrical engineering. This comprehensive dictionary contains more than 60,000 electrotechnical and engineering terms - used in textbooks, manuals, data sheets, whitepapers and international standards. British English and American English spelling differences are identified. Terms used in IEC standards of the International Electrotechnical Commission are marked, allowing the reader to have easy access to the multilingual glossary of the IEC. This book contains the in-house dictionaries of the internationally operating companies Festo, KEB, Phoenix Contact, and Rittal. Topics: - Basic of electrical engineering, - Electrical power engineering, - Mechatronics, - Electrical drive engineering, - Electrical connection technology, - Automation technology, - Safety-related technology, - Information technology, - Measurement and control technology, - Explosion protection - Power plant technology, - Lightning and overvoltage protection. (orig.)

  16. Engineering microbial communities using thermodynamic principles and electrical interfaces.

    Science.gov (United States)

    Zerfaß, Christian; Chen, Jing; Soyer, Orkun S

    2017-12-18

    Microbial communities present the next research frontier. We argue here that understanding and engineering microbial communities requires a holistic view that considers not only species-species, but also species-environment interactions, and feedbacks between ecological and evolutionary dynamics (eco-evo feedbacks). Due this multi-level nature of interactions, we predict that approaches aimed soley at altering specific species populations in a community (through strain enrichment or inhibition), would only have a transient impact, and species-environment and eco-evo feedbacks would eventually drive the microbial community to its original state. We propose a higher-level engineering approach that is based on thermodynamics of microbial growth, and that considers specifically microbial redox biochemistry. Within this approach, the emphasis is on enforcing specific environmental conditions onto the community. These are expected to generate higher-level thermodynamic bounds onto the system, which the community structure and function can then adapt to. We believe that the resulting end-state can be ecologically and evolutionarily stable, mimicking the natural states of complex communities. Toward designing the exact nature of the environmental enforcement, thermodynamics and redox biochemistry can act as coarse-grained principles, while the use of electrodes-as electron providing or accepting redox agents-can provide implementation with spatiotemporal control. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

  17. Designing electrical stimulated bioreactors for nerve tissue engineering

    Science.gov (United States)

    Sagita, Ignasius Dwi; Whulanza, Yudan; Dhelika, Radon; Nurhadi, Ibrahim

    2018-02-01

    Bioreactor provides a biomimetic ecosystem that is able to culture cells in a physically controlled system. In general, the controlled-parameters are temperature, pH, fluid flow, nutrition flow, etc. In this study, we develop a bioreactor that specifically targeted to culture neural stem cells. This bioreactor could overcome some limitations of conventional culture technology, such as petri dish, by providing specific range of observation area and a uniform treatment. Moreover, the microfluidic bioreactor, which is a small-controlled environment, is able to observe as small number of cells as possible. A perfusion flow is applied to mimic the physiological environment in human body. Additionally, this bioreactor also provides an electrical stimulation which is needed by neural stem cells. In conclusion, we found the correlation between the induced shear stress with geometric parameters of the bioreactor. Ultimately, this system shall be used to observe the interaction between stimulation and cell growth.

  18. The QED engine - Fusion-electric propulsion for Cis-Oort/Quasi-Interstellar (QIS) flight

    Science.gov (United States)

    Bussard, Robert W.; Jameson, Lorin W.; Froning, H. D., Jr.

    1993-01-01

    A summary is presented of QED fusion-direct-electric engine systems, their features, and performance ranges. The principles and characteristics of inertial-electrostatic-fusion (IEF) power source systems are then reviewed, and their application to the diluted-fusion-product (DFP) engine concept for QIS missions is discussed. Particular attention is given to vehicle performance over a range of very high specific impulses and to specifications of a typical candidate DFP/IEF engine and a single-stage vehicle for rapid flight to 550 AU.

  19. Engineering Topological Surface State of Cr-doped Bi2Se3 under external electric field

    Science.gov (United States)

    Zhang, Jian-Min; Lian, Ruqian; Yang, Yanmin; Xu, Guigui; Zhong, Kehua; Huang, Zhigao

    2017-03-01

    External electric field control of topological surface states (SSs) is significant for the next generation of condensed matter research and topological quantum devices. Here, we present a first-principles study of the SSs in the magnetic topological insulator (MTI) Cr-doped Bi2Se3 under external electric field. The charge transfer, electric potential, band structure and magnetism of the pure and Cr doped Bi2Se3 film have been investigated. It is found that the competition between charge transfer and spin-orbit coupling (SOC) will lead to an electrically tunable band gap in Bi2Se3 film under external electric field. As Cr atom doped, the charge transfer of Bi2Se3 film under external electric field obviously decreases. Remarkably, the band gap of Cr doped Bi2Se3 film can be greatly engineered by the external electric field due to its special band structure. Furthermore, magnetic coupling of Cr-doped Bi2Se3 could be even mediated via the control of electric field. It is demonstrated that external electric field plays an important role on the electronic and magnetic properties of Cr-doped Bi2Se3 film. Our results may promote the development of electronic and spintronic applications of magnetic topological insulator.

  20. Electrode erosion in steady-state electric propulsion engines

    Science.gov (United States)

    Pivirotto, Thomas J.; Deininger, William D.

    1988-01-01

    The anode and cathode of a 30 kW class arcjet engine were sectioned and analyzed. This arcjet was operated for a total time of 573 hr at power levels between 25 and 30 kW with ammonia at flow rates of 0.25 and 0.27 gm/s. The accumulated run time was sufficient to clearly establish erosion patterns and their causes. The type of electron emission from various parts of the cathode surface was made clear by scanning electron microscope analysis. A scanning electron microscope was used to study recrystallization on the hot anode surface. These electrodes were made of 2 percent thoriated tungsten and the surface thorium content and gradient perpendicular to the surfaces was determined by quantitative microprobe analysis. The results of this material analysis on the electrodes and recommendations for improving electrode operational life time are presented.

  1. Matlab for electrical and computer engineering students and professionals with Simulink

    CERN Document Server

    Priemer, Roland

    2013-01-01

    This book combines the teaching of the MATLAB#65533; programming language with the presentation and development of carefully selected electrical and computer engineering (ECE) fundamentals. This is what distinguishes it from other books concerned with MATLAB#65533;: it is directed specifically to ECE concerns.

  2. Identifying and Investigating Difficult Concepts in Engineering Mechanics and Electric Circuits. Research Brief

    Science.gov (United States)

    Streveler, Ruth; Geist, Monica; Ammerman, Ravel; Sulzbach, Candace; Miller, Ronald; Olds, Barbara; Nelson, Mary

    2007-01-01

    This study extends ongoing work to identify difficult concepts in thermal and transport science and measure students' understanding of those concepts via a concept inventory. Two research questions provided the focal point: "What important concepts in electric circuits and engineering mechanics do students find difficult to learn?" and…

  3. The Advancement in Using Remote Laboratories in Electrical Engineering Education: A Review

    Science.gov (United States)

    Almarshoud, A. F.

    2011-01-01

    The rapid development in Internet technology and its big popularity has led some universities around the world to incorporate web-based learning in some of their programmes. The present paper introduces a comprehensive survey of the publications about using remote laboratories in electrical engineering education. Remote laboratories are web-based,…

  4. An Electrical Engineering Summer Academy for Middle School and High School Students

    Science.gov (United States)

    LoPresti, Peter G.; Manikas, Theodore W.; Kohlbeck, Jeff G.

    2010-01-01

    An Electrical Engineering Summer Academy for Pre-College Students was held at the University of Tulsa, Tulsa, OK, during the summers of 2007 and 2008. The Academy participants included students having just completed 7th to 11th grade and teachers from middle school through high school. The students and teachers participated in team-building,…

  5. Engineering support activities for the Apollo 17 Surface Electrical Properties Experiment.

    Science.gov (United States)

    Cubley, H. D.

    1972-01-01

    Description of the engineering support activities which were required to ensure fulfillment of objectives specified for the Apollo 17 SEP (Surface Electrical Properties) Experiment. Attention is given to procedural steps involving verification of hardware acceptability to the astronauts, computer simulation of the experiment hardware, field trials, receiver antenna pattern measurements, and the qualification test program.

  6. Improvements to an Electrical Engineering Skill Audit Exam to Improve Student Mastery of Core EE Concepts

    Science.gov (United States)

    Parent, D. W.

    2011-01-01

    The San Jose State University Electrical Engineering (EE) Department implemented a skill audit exam for graduating seniors in 1999 with the purpose of assessing the teaching and the students' mastery of core concepts in EE. However, consistent low scores for the first years in which the test was administered suggested that students had little…

  7. Teaching Complicated Conceptual Knowledge with Simulation Videos in Foundational Electrical Engineering Courses

    Science.gov (United States)

    Chen, Baiyun; Wei, Lei; Li, Huihui

    2016-01-01

    Building a solid foundation of conceptual knowledge is critical for students in electrical engineering. This mixed-method case study explores the use of simulation videos to illustrate complicated conceptual knowledge in foundational communications and signal processing courses. Students found these videos to be very useful for establishing…

  8. Improving Electrical Engineering Education at the American University of Sharjah through Continuous Assessment

    Science.gov (United States)

    Al-Nashash, Hasan; Khaliq, Abdul; Qaddoumi, Nasser; Al-Assaf, Yousef; Assaleh, Khaled; Dhaouadi, Rached; El-Tarhuni, Mohamed

    2009-01-01

    The electrical engineering (ELE) program at the American University of Sharjah (AUS) is designed to fulfill the ABET criteria. Several assessment tools are used to qualitatively and quantitatively measure the level of achievement of the program's educational objectives and outcomes. These tools include alumni, employer, and graduate advisor…

  9. Active and Collaborative Learning in an Introductory Electrical and Computer Engineering Course

    Science.gov (United States)

    Kotru, Sushma; Burkett, Susan L.; Jackson, David Jeff

    2010-01-01

    Active and collaborative learning instruments were introduced into an introductory electrical and computer engineering course. These instruments were designed to assess specific learning objectives and program outcomes. Results show that students developed an understanding comparable to that of more advanced students assessed later in the…

  10. Electrical Power Engineering Technology: Designing a New Two-Plus-Two Curriculum

    Science.gov (United States)

    Burson, Jack

    1978-01-01

    An upper-division two-year program in electrical power engineering technology developed at Oklahoma State University is described. The typical two-plus-two program in mechanical, electronics, electromechanical, or other related technologies consists of two years of study at the associate level followed by two years at the bachelor's level. (MF)

  11. Industrial Education. Mini-Course Cluster: Bikes, Electricity, Small Engines. [Grade 9].

    Science.gov (United States)

    Parma City School District, OH.

    Part of a series of curriculum guides dealing with industrial education in junior high schools, this guide provides three units to be used in a one semester course in grade 9 on the subjects of bikes, electricity, and small engines. The section on bicycles is divided into two parts, mechanical and power (i.e. motorcycles) and covers the topics of…

  12. 76 FR 28333 - Electric Engineering, Architectural Services, Design Policies and Construction Standards

    Science.gov (United States)

    2011-05-17

    ...; ] DEPARTMENT OF AGRICULTURE Rural Utilities Service 7 CFR Parts 1724 and 1726 RIN 0572-AC20 Electric Engineering, Architectural Services, Design Policies and Construction Standards AGENCY: Rural Utilities..., ARCHITECTURAL SERVICES AND DESIGN POLICIES AND PROCEDURES 1. The authority citation for part 1724 continues to...

  13. COOPERATIVE MODE OF ELECTRIC MOTOR AND INTERNAL COMBUSTION ENGINE OPERATION IN THE CONVERSION HYBRID CAR

    Directory of Open Access Journals (Sweden)

    V. Dvadnenko

    2016-12-01

    Full Text Available In the given article the authors proposed a method to control the car, which is converted into a hybrid one. The electric motor and combustion engine operate alternately in the car. They proposed a device for implementing this method and a circuit design for the device in question. They also calculated the dynamics of the vehicle under the joint acceleration.

  14. Stirling engine electric hybrid vehicle propulsion system conceptual design study. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Dochat, G; Artiles, A; Killough, J; Ray, A; Chen, H S

    1978-08-01

    Results of a six-month study to characterize a series Stirling engine electric hybrid vehicle propulsion system are presented. The Stirling engine was selected as the heat conversion element to exploit the high efficiency (> .36), low pollution, multi-fuel and quiet operation of this machine. A free-piston Stirling engine driving a linear alternator in a hermatically sealed enclosure was chosen to gain the reliability, long life, and maintenance free characteristics of a sealed unit. The study performs trade off evaluations, selection of engine, battery, motor and inverter size, optimization of components, and develops a conceptual design and characterization of the total propulsion system. The conclusion of the study is that a Stirling engine electric hybrid propulsion system can be used successfully to augment the battery storage of a passenger vehicle and will result in significant savings of petroleum energy over present passenger vehicles. The performance and range augmentation of the hybrid design results in significant improvements over an all electric vehicle. The hybrid will be capable of performing 99% of the passenger vehicle annual trip distribution requirements with extremely low fuel usage. (TFD)

  15. A One-Credit Hands-On Introductory Course in Electrical and Computer Engineering Using a Variety of Topic Modules

    Science.gov (United States)

    Pierre, J. W.; Tuffner, F. K.; Anderson, J. R.; Whitman, D. L.; Ula, A. H. M. S.; Kubichek, R. F.; Wright, C. H. G.; Barrett, S. F.; Cupal, J. J.; Hamann, J. C.

    2009-01-01

    This paper describes a one-credit laboratory course for freshmen majoring in electrical and computer engineering (ECE). The course is motivational in nature and exposes the students to a wide range of areas of electrical and computer engineering. The authors believe it is important to give freshmen a broad perspective of what ECE is all about, and…

  16. 76 FR 292 - Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines

    Science.gov (United States)

    2011-01-04

    ... directive (AD) that applies to General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines. The... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT...

  17. 75 FR 12661 - Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines

    Science.gov (United States)

    2010-03-17

    ...) for General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines with certain low-pressure...-05-AD; Amendment 39-16240; AD 2010-06-15] RIN 2120-AA64 Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT...

  18. 75 FR 32649 - Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines

    Science.gov (United States)

    2010-06-09

    ... Electric Company (GE) CF6-45 and CF6-50 series turbofan engines with certain low-pressure turbine (LPT...; AD 2010-12-10] RIN 2120-AA64 Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request...

  19. A Review of the Responses of Two- and Three-Dimensional Engineered Tissues to Electric Fields

    Science.gov (United States)

    Hronik-Tupaj, Marie

    2012-01-01

    The application of external biophysical signals is one approach to tissue engineering that is explored less often than more traditional additions of exogenous biochemical and chemical factors to direct cell and tissue outcomes. The study of bioelectromagnetism and the field of electrotherapeutics have evolved over the years, and we review biocompatible electric stimulation devices and their successful application to tissue growth. Specifically, information on capacitively coupled alternating current, inductively coupled alternating current, and direct current devices is described. Cell and tissue responses from the application of these devices, including two- and three-dimensional in vitro studies and in vivo studies, are reviewed with regard to cell proliferation, adhesion, differentiation, morphology, and migration and tissue function. The current understanding of cellular mechanisms related to electric stimulation is detailed. The advantages of electric stimulation are compared with those pf other techniques, and areas in which electric fields are used as an adjuvant therapy for healing and regeneration are discussed. PMID:22046979

  20. Professor Michael Levitt

    Directory of Open Access Journals (Sweden)

    Gemma-Louise Davies

    2015-10-01

    Full Text Available Professor Michael Levitt (Stanford University, USA won the 2013 Nobel Prize in Chemistry for the development of multiscale models for complex chemical systems—computational tools which can calculate the course of chemical reactions. Professor Levitt was born in Pretoria, South Africa; he came to the UK on a summer vacation aged 16, where he decided to stay and study for his A‑levels. His interest in the physics of living systems drove him to study biophysics at King’s College London, before securing a PhD position at the Laboratory of Molecular Biology in Cambridge. In the interim year between his degree and beginning his PhD, Professor Levitt worked at the Weizmann Institute of Science in Israel, where he met his future wife. They married later that year and moved to Cambridge, where their three children were born. After completing his PhD, he spent time working in Israel, Cambridge, the Salk Institute and Stanford (both California. Since 1986, he has split his time between Israel and California. Outside of science, he is a keen hiker and he is well-known to have attended the eclectic ‘Burning Man’ Festival in California.[1]Professor Levitt visited the University of Warwick to speak at the Computational Molecular Science Annual Conference in March 2015. In this interview, Dr Gemma-Louise Davies, an Institute of Advanced Study Global Research Fellow, spoke to Professor Levitt about the importance of Interdisciplinarity in his field, role models in Academia, and his plans for the future.Image: Professor Michael Levitt (left with Dr Scott Habershon (right, organiser of the 2015 Computational Molecular Science Annual Conference during his visit to the University of Warwick in March 2015.[1] ‘Burning Man’ is a unique annual festival dedicated to community, art, music, self-expression and self-reliance. Tens of thousands of people flock to this temporary metropolis built in the Californian desert.

  1. The Effects of Professors' Race and Gender on Student Evaluations and Performance

    Science.gov (United States)

    Basow, Susan A.; Codos, Stephanie; Martin, Julie L.

    2013-01-01

    This experimental study examined the effects of professor gender, professor race, and student gender on student ratings of teaching effectiveness and amount learned. After watching a three-minute engineering lecture presented by a computer-animated professor who varied by gender and race (African American, White), female and male undergraduates…

  2. Oil Coking Prevention Using Electric Water Pump for Turbo-Charge Spark-Ignition Engines

    Directory of Open Access Journals (Sweden)

    Han-Ching Lin

    2014-01-01

    Full Text Available Turbocharger has been widely implemented for internal combustion engine to increase an engine's power output and reduce fuel consumption. However, its operating temperature would rise to 340°C when engine stalls. This higher temperature may results in bearing wear, run-out, and stick, due to oil coking and insufficient lubrication. In order to overcome these problems, this paper employs Electric Water Pump (EWP to supply cool liquid to turbocharger actively when the engine stalls. The system layout, operating timing, and duration of EWP are investigated for obtaining optimal performance. The primarily experimental results show that the proposed layout and control strategy have a lower temperature of 100°C than the conventional temperature 225°C.

  3. Multi-Institution Study of Student Demographics and Outcomes in Electrical and Computer Engineering in the USA

    Science.gov (United States)

    Lord, Susan M.; Layton, Richard A.; Ohland, Matthew W.

    2015-01-01

    Electrical Engineering (EE) and Computer Engineering (CpE) programs have similar curricula, but different demographics and student outcomes. This paper extends earlier longitudinal studies to a larger and more diverse dataset with 90,000 first-time-in-college and 26,000 transfer students who majored in engineering at USA institutions, including…

  4. Electric propulsion. [pulsed plasma thruster and electron bombardment ion engine for MSAT attitude control and stationkeeping

    Science.gov (United States)

    1982-01-01

    An alternative propulsion subsystem for MSAT is presented which has a potential of reducing the satellite weight by more than 15%. The characteristics of pulsed plasma and ion engines are described and used to estimate of the mass of the propellant and thrusters for attitude control and stationkeeping functions for MSAT. Preliminary estimates indicate that the electric propulsion systems could also replace the large momentum wheels necessary to counteract the solar pressure; however, the fine pointing wheels would be retained. Estimates also show that either electric propulsion system can save approximately 18% to 20% of the initial 4,000 kg mass. The issues that require further experimentation are mentioned.

  5. 23rd June 2010 - University of Bristol Head of the Aerospace Engineering Department and Professor of Aerospace Dynamics N. Lieven visiting CERN control centre with Beams Department Head P. Collier, visiting the LHC superconducting magnet test hall with R. Veness and CMS control centre with Collaboration Spokesperson G. Tonelli and CMS User J. Goldstein.

    CERN Multimedia

    Jean-Claude Gadmer

    2010-01-01

    23rd June 2010 - University of Bristol Head of the Aerospace Engineering Department and Professor of Aerospace Dynamics N. Lieven visiting CERN control centre with Beams Department Head P. Collier, visiting the LHC superconducting magnet test hall with R. Veness and CMS control centre with Collaboration Spokesperson G. Tonelli and CMS User J. Goldstein.

  6. 27 August 2013 - Signature of an Agreement between KTO Karatay University in Turkey represented by the Dean of Engineering Professor Ali Okatan, CERN represented by Director for Research and Computing Dr Sergio Bertolucci and ALICE Collaboration represented by ALICE Collaboration Spokesperson Dr Paolo Giubellino.

    CERN Multimedia

    Maximilien Brice

    2013-01-01

    27 August 2013 - Signature of an Agreement between KTO Karatay University in Turkey represented by the Dean of Engineering Professor Ali Okatan, CERN represented by Director for Research and Computing Dr Sergio Bertolucci and ALICE Collaboration represented by ALICE Collaboration Spokesperson Dr Paolo Giubellino.

  7. Modification and tuning of diesel bus engine for biogas electricity production

    Directory of Open Access Journals (Sweden)

    Sittiboon Siripornakarachai

    2007-11-01

    Full Text Available This study is to convert and tune a bus diesel engine for electricity production in a farm using biogas as fuel. The engine under study is a Hino K-13CTI 13,000 cc 24 valve turbocharged engine coupled to a 3 phase 4 pole induction motor to produce electricity at 50 Hz. Modifications include an addition of biogas carburetor for air-fuel mixing, replacing the fuel injection system with spark ignition system, reduction of compression ratio from the original 16:1 to 8:1 using a cylinder head spacer, and modification of the turbocharger waste gate so the boost pressure can be adjusted. When the induction motor is synchronized to the power grid, the running speed of the engine is 1,500 rpm. Optimal engine efficiency was achieved at 28.6% by setting the lambda factor at 1.097, ignition timing at 54o before top dead center, and the turbocharger boost at 56 kPa. With this setting, the generator power output is 134.20 kilowatt with emission of CO and NOX being 1,154 and 896 ppm respectively.

  8. The suitability of internal combustion engine sounds as artificial warning sounds for electric and hybrid vehicles

    Directory of Open Access Journals (Sweden)

    Ivan Bolkovac

    2014-08-01

    Full Text Available The paper discusses the issue of adding artificial warning sounds to hybrid and fully electric vehicles, in order to increase traffic safety by making these vehicles audible at low speeds. The goal of this modification is to enable the pedestrians to perceive possible danger coming from such a vehicle in time to respond accordingly. Following the results of previous research which state that the sounds of internal combustion engines are valid candidates for artificial warning sounds to be added to hybrid or fully electric vehicles, a preliminary examination of the suitability and acceptability of different engine sounds in various modes of operation has been conducted. The chosen modes of operation are running in idle, at 2000 rpm and 3000 rpm with the vehicle stopped. Both gasoline and diesel engines were investigated. To expand the range of engine sounds, the type of vehicles was not limited to personal cars. The results show significant differences in suitability of engine sounds for the stated purpose, with vehicle type being the main differentiating factor.

  9. Professor Kalkman retires

    NARCIS (Netherlands)

    Baas, Pieter

    1991-01-01

    On 13 December 1990 Prof. Dr. Cornelis (Kees) Kalkman retired from the positions of Professor of Plant Systematics and Scientific Director of the Rijksherbarium/ Hortus Botanicus by presenting his valedictory lecture to the academic community of Leiden University and the assembled Dutch Botanical

  10. Professor Wolfgang Panofsky

    CERN Multimedia

    2007-01-01

    "Professor Wolfgang panofsky, who died on September 24 aged 88, was a particle physicists and director of the Stanford Linear Accelerator Centre (SLAC) in California; with Jack Steinberger, he was the first to isolate the neutral pi meson, one of the subatomic particles which had been predicted by theoretical scientists to account for the strng force which binds the nuclei of atoms." (1 page)

  11. Professor Tiina Tasmuth Helsingis

    Index Scriptorium Estoniae

    2000-01-01

    Tervisekasvatuse õppetooli professor Tiina Tasmuth osales 11.-14. juunini Helsingis toimunud rahvusvahelise konverentsi "2nd Psycho-Social Impacts of Breast Cancer" töös ning esines ettekandega teemal "Chronic post-treatment symptoms in patients with breast cancer" : [täistekst

  12. Professor og DMI

    DEFF Research Database (Denmark)

    Kaas, Eigil

    2010-01-01

    oplever meget lave temperaturer - og for Danmarks vedkommende en usædvanlig lang periode med vintervejr. Forklaringen kommer fra professor Eigil Kaas fra Niels Bohr Instituttet ved Københavns Universitet. Han forklarer til jp.dk, at vintervejret dog er betinget af den mere eller mindre tilfældige måde...

  13. Electrical stimulation directs engineered cardiac tissue to an age-matched native phenotype

    Directory of Open Access Journals (Sweden)

    Richard A Lasher

    2012-12-01

    Full Text Available Quantifying structural features of native myocardium in engineered tissue is essential for creating functional tissue that can serve as a surrogate for in vitro testing or the eventual replacement of diseased or injured myocardium. We applied three-dimensional confocal imaging and image analysis to quantitatively describe the features of native and engineered cardiac tissue. Quantitative analysis methods were developed and applied to test the hypothesis that environmental cues direct engineered tissue toward a phenotype resembling that of age-matched native myocardium. The analytical approach was applied to engineered cardiac tissue with and without the application of electrical stimulation as well as to age-matched and adult native tissue. Individual myocytes were segmented from confocal image stacks and assigned a coordinate system from which measures of cell geometry and connexin-43 spatial distribution were calculated. The data were collected from 9 nonstimulated and 12 electrically stimulated engineered tissue constructs and 5 postnatal day 12 and 7 adult hearts. The myocyte volume fraction was nearly double in stimulated engineered tissue compared to nonstimulated engineered tissue (0.34 ± 0.14 vs 0.18 ± 0.06 but less than half of the native postnatal day 12 (0.90 ± 0.06 and adult (0.91 ± 0.04 myocardium. The myocytes under electrical stimulation were more elongated compared to nonstimulated myocytes and exhibited similar lengths, widths, and heights as in age-matched myocardium. Furthermore, the percentage of connexin-43-positive membrane staining was similar in the electrically stimulated, postnatal day 12, and adult myocytes, whereas it was significantly lower in the nonstimulated myocytes. Connexin-43 was found to be primarily located at cell ends for adult myocytes and irregularly but densely clustered over the membranes of nonstimulated, stimulated, and postnatal day 12 myocytes. These findings support our hypothesis and reveal

  14. Electrical performances of pyroelectric bimetallic strip heat engines describing a Stirling cycle

    Science.gov (United States)

    Arnaud, A.; Boughaleb, J.; Monfray, S.; Boeuf, F.; Cugat, O.; Skotnicki, T.

    2015-12-01

    This paper deals with the analytical modeling of pyroelectric bimetallic strip heat engines. These devices are designed to exploit the snap-through of a thermo-mechanically bistable membrane to transform a part of the heat flowing through the membrane into mechanical energy and to convert it into electric energy by means of a piezoelectric layer deposited on the surface of the bistable membrane. In this paper, we describe the properties of these heat engines in the case when they complete a Stirling cycle, and we evaluate the performances (available energy, Carnot efficiency...) of these harvesters at the macro- and micro-scale.

  15. Improving the Information Flow Regarding Customer Needs to the Electrical Engineering Department

    OpenAIRE

    Helin, Mikael

    2017-01-01

    This Thesis focuses on improving the information flow regarding customer needs from Marine segments to the Electrical Engineering department. The case company provides its services for Land and Marine applications all over the world – either as turnkey or instrument deliveries. End-customer delivery projects tend to vary significantly from each other due to local regulations and customer specifications. Therefore, the case company needs to deliver a unique system for each End-customer individ...

  16. New high-speed line Nuremberg - Ingolstadt - Electrical engineering equipment; Neubaustrecke (NBS) Nuernberg - Ingolstadt - Technische Ausruestung

    Energy Technology Data Exchange (ETDEWEB)

    Krems, S. [Balfour Beatty Rail GmbH, Berlin (Germany); Matthes, U. [DB Projektbau GmbH, Nuernberg (Germany)

    2007-07-01

    The Bavarian fast railway line Nuremberg - Ingolstadt is equipped with most recent railway infrastructure for a 300 km/h fast high-speed traffic. The electrical engineering installations were implemented within a seven years period. Since December 2006 the line has been integrated into scheduled services and operated with high-speed trains. So far, the installations complied fully with all the requirements. (orig.)

  17. Inverted Classroom by Topic - A Study in Mathematics for Electrical Engineering Students

    OpenAIRE

    Isabel Braun; Stefan Rittter; Mikko Vasko

    2014-01-01

    The inverted classroom is a teaching model, where the students prepare for classroom by watching video lectures. The classroom time is then dedicated to individual practice. We evaluated a mathematics course for electrical engineering students throughout three semesters, where 20% of the topics were taught using the inverted classroom model. The aim was to find out whether the model can help to better address groups with large differences in prior knowledge in mathematics. We report mainly po...

  18. Electric Power Engineering Cost Predicting Model Based on the PCA-GA-BP

    Science.gov (United States)

    Wen, Lei; Yu, Jiake; Zhao, Xin

    2017-10-01

    In this paper a hybrid prediction algorithm: PCA-GA-BP model is proposed. PCA algorithm is established to reduce the correlation between indicators of original data and decrease difficulty of BP neural network in complex dimensional calculation. The BP neural network is established to estimate the cost of power transmission project. The results show that PCA-GA-BP algorithm can improve result of prediction of electric power engineering cost.

  19. Nuclear electric propulsion mission engineering study development program and costs estimates, Phase 2 review

    Science.gov (United States)

    1972-01-01

    The results are presented of the second six-month performance period of the Nuclear Electric Propulsion Mission Engineering Study. A brief overview of the program, identifying the study objectives and approach, and a discussion of the program status and schedule are presented. The program results are reviewed and key conclusions to date are summarized. Planned effort for the remainder of the program is reviewed.

  20. Electrical stimulation of nerve cells using conductive nanofibrous scaffolds for nerve tissue engineering.

    Science.gov (United States)

    Ghasemi-Mobarakeh, Laleh; Prabhakaran, Molamma P; Morshed, Mohammad; Nasr-Esfahani, Mohammad Hossein; Ramakrishna, Seeram

    2009-11-01

    Fabrication of scaffolds with suitable chemical, mechanical, and electrical properties is critical for the success of nerve tissue engineering. Electrical stimulation was directly applied to electrospun conductive nanofibrous scaffolds to enhance the nerve regeneration process. In the present study, electrospun conductive nanofibers were prepared by mixing 10 and 15 wt% doped polyaniline (PANI) with poly (epsilon-caprolactone)/gelatin (PG) (70:30) solution (PANI/PG) by electrospinning. The fiber diameter, pore size, hydrophilicity, tensile properties, conductivity, Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy spectra of nanofibers were determined, and the in vitro biodegradability of the different nanofibrous scaffolds was also evaluated. Nanofibrous scaffolds containing 15% PANI was found to exhibit the most balanced properties to meet all the required specifications for electrical stimulation for its enhanced conductivity and is used for in vitro culture and electrical stimulation of nerve stem cells. 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay and scanning electron microscopy results showed that conductive nanofibrous scaffolds are suitable substrates for the attachment and proliferation of nerve stem cells. Electrical stimulation through conductive nanofibrous PANI/PG scaffolds showed enhanced cell proliferation and neurite outgrowth compared to the PANI/PG scaffolds that were not subjected to electrical stimulation.

  1. A Chemically Polymerized Electrically Conducting Composite of Polypyrrole Nanoparticles and Polyurethane for Tissue Engineering

    Science.gov (United States)

    Broda, Christopher R.; Lee, Jae Y.; Sirivisoot, Sirinrath; Schmidt, Christine E.; Harrison, Benjamin S.

    2011-01-01

    A variety of cell types respond to electrical stimuli, accordingly many conducting polymers (CPs) have been used as tissue engineering (TE) scaffolds, one such CP is polypyrrole (PPy). PPy is a well studied biomaterial with potential TE applications due to its electrical conductivity and many other beneficial properties. Combining its characteristics with an elastomeric material, such as polyurethane (PU), may yield a hybrid scaffold with electrical activity and significant mechanical resilience. Pyrrole was in situ polymerized within a PU emulsion mixture in weight ratios of 1:100, 1:20, 1:10 and 1:5, respectively. Morphology, electrical conductivity, mechanical properties and cytocompatibility with C2C12 myoblast cells were characterized. The polymerization resulted in a composite with a principle base of PU interspersed with an electrically percolating network of PPy nanoparticles. As the mass ratio of PPy to PU increased so did electrical conductivity of the composites. In addition, as the mass ratio of PPy to PU increased, stiffness of the composite increased while maximum elongation length decreased. Ultimate tensile strength was reduced by approximately 47% across all samples with the addition of PPy to the PU base. Cytocompatibility assay data indicated no significant cytotoxic effect from the composites. Static cellular seeding of C2C12 cells and subsequent differentiation showed myotube formation on the composite materials. PMID:21681943

  2. Electrical Maxwell demon and Szilard engine utilizing Johnson noise, measurement, logic and control.

    Science.gov (United States)

    Kish, Laszlo Bela; Granqvist, Claes-Göran

    2012-01-01

    We introduce a purely electrical version of Maxwell's demon which does not involve mechanically moving parts such as trapdoors, etc. It consists of a capacitor, resistors, amplifiers, logic circuitry and electronically controlled switches and uses thermal noise in resistors (Johnson noise) to pump heat. The only types of energy of importance in this demon are electrical energy and heat. We also demonstrate an entirely electrical version of Szilard's engine, i.e., an information-controlled device that can produce work by employing thermal fluctuations. The only moving part is a piston that executes work, and the engine has purely electronic controls and it is free of the major weakness of the original Szilard engine in not requiring removal and repositioning the piston at the end of the cycle. For both devices, the energy dissipation in the memory and other binary informatics components are insignificant compared to the exponentially large energy dissipation in the analog part responsible for creating new information by measurement and decision. This result contradicts the view that the energy dissipation in the memory during erasure is the most essential dissipation process in a demon. Nevertheless the dissipation in the memory and information processing parts is sufficient to secure the Second Law of Thermodynamics.

  3. A Route for Polymer Nanocomposites with Engineered Electrical Conductivity and Percolation Threshold

    Directory of Open Access Journals (Sweden)

    Lawrence T. Drzal

    2010-02-01

    Full Text Available Polymer nanocomposites with engineered electrical properties can be made by tuning the fabrication method, processing conditions and filler’s geometric and physical properties. This work focuses on investigating the effect of filler’s geometry (aspect ratio and shape, intrinsic electrical conductivity, alignment and dispersion within the polymer, and polymer crystallinity, on the percolation threshold and electrical conductivity of polypropylene based nanocomposites. The conductive reinforcements used are exfoliated graphite nanoplatelets, carbon black, vapor grown carbon fibers and polyacrylonitrile carbon fibers. The composites are made using melt mixing followed by injection molding. A coating method is also employed to improve the nanofiller’s dispersion within the polymer and compression molding is used to alter the nanofiller’s alignment.

  4. Comparison of ORC Turbine and Stirling Engine to Produce Electricity from Gasified Poultry Waste

    Directory of Open Access Journals (Sweden)

    Franco Cotana

    2014-08-01

    Full Text Available The Biomass Research Centre, section of CIRIAF, has recently developed a biomass boiler (300 kW thermal powered, fed by the poultry manure collected in a nearby livestock. All the thermal requirements of the livestock will be covered by the heat produced by gas combustion in the gasifier boiler. Within the activities carried out by the research project ENERPOLL (Energy Valorization of Poultry Manure in a Thermal Power Plant, funded by the Italian Ministry of Agriculture and Forestry, this paper aims at studying an upgrade version of the existing thermal plant, investigating and analyzing the possible applications for electricity production recovering the exceeding thermal energy. A comparison of Organic Rankine Cycle turbines and Stirling engines, to produce electricity from gasified poultry waste, is proposed, evaluating technical and economic parameters, considering actual incentives on renewable produced electricity.

  5. Professors' Observations on Their Work.

    Science.gov (United States)

    Myers, Betty; Mager, Gerald M.

    Previous studies of professors of education have noted what activities comprised the work of being a professor, how professors allocated time to the various work tasks, how they would have preferred to allocate time, and insights they had about their work. In this study, parallel data were gathered on the broader education professoriate. Survey…

  6. Positivistas e republicanos: os professores da Escola de Engenharia de Porto Alegre entre a atividade política e a administração pública (1896-1930 Positivists and Republicans: the professors of the School of Engineering in Porto Alegre between political activity and public administration (1896-1930

    Directory of Open Access Journals (Sweden)

    Flavio M. Heinz

    2009-12-01

    Full Text Available A história da administração pública no sul do Brasil durante a Primeira República põe em evidência uma instituição de formação superior, a Escola de Engenharia de Porto Alegre, que, fundada em 1896, forneceu parte significativa dos quadros técnicos das secretarias e agências do estado nas décadas seguintes, notadamente da Secretaria dos Negócios de Obras Públicas (SOP. Neste artigo (1 faremos uma breve exposição do cenário político-institucional no sul do Brasil na transição do século XIX para o XX; (2 apresentaremos as linhas gerais do processo de organização da Escola de Engenharia de Porto Alegre; e (3 discutiremos alguns aspectos do percurso profissional, administrativo e político de seu grupo original de docentes e de seus primeiros diplomados.The history of public administration in Southern Brazil during the so-called "First Republic" includes an institution of higher education, the School of Engineering in Porto Alegre, that was founded in 1896 and provided a major part of the cadre of technicians of state departments and agencies in the following decades, particularly of the state's Department of Public Works. In this paper the author (1 briefly discusses the political-institutional scenario in Southern Brazil during the transition from the 19th to the 20th century, then (2 sketches the process of organization of the School of Engineering in Porto Alegre, and finally (3 presents some aspects of the professional, administrative and political career of the School's original group of professors and its first graduates.

  7. Conceptual understanding of electrical circuits in secondary vocational engineering education: combining traditional instruction with inquiry learning in a virtual lab

    NARCIS (Netherlands)

    Kolloffel, Bas Jan; de Jong, Anthonius J.M.

    2013-01-01

    Background: Traditionally, engineering curricula about electrical circuits use textbook instruction and hands-on lessons, which are effective approaches for teaching terms and definitions, the procedural use of formulas, and how to build circuits. Nonetheless, students often lack conceptual

  8. Enhanced Electrical Integration of Engineered Human Myocardium via Intramyocardial versus Epicardial Delivery in Infarcted Rat Hearts.

    Directory of Open Access Journals (Sweden)

    Kaytlyn A Gerbin

    Full Text Available Cardiac tissue engineering is a promising approach to provide large-scale tissues for transplantation to regenerate the heart after ischemic injury, however, integration with the host myocardium will be required to achieve electromechanical benefits. To test the ability of engineered heart tissues to electrically integrate with the host, 10 million human embryonic stem cell (hESC-derived cardiomyocytes were used to form either scaffold-free tissue patches implanted on the epicardium or micro-tissue particles (~1000 cells/particle delivered by intramyocardial injection into the left ventricular wall of the ischemia/reperfusion injured athymic rat heart. Results were compared to intramyocardial injection of 10 million dispersed hESC-cardiomyocytes. Graft size was not significantly different between treatment groups and correlated inversely with infarct size. After implantation on the epicardial surface, hESC-cardiac tissue patches were electromechanically active, but they beat slowly and were not electrically coupled to the host at 4 weeks based on ex vivo fluorescent imaging of their graft-autonomous GCaMP3 calcium reporter. Histologically, scar tissue physically separated the patch graft and host myocardium. In contrast, following intramyocardial injection of micro-tissue particles and suspended cardiomyocytes, 100% of the grafts detected by fluorescent GCaMP3 imaging were electrically coupled to the host heart at spontaneous rate and could follow host pacing up to a maximum of 300-390 beats per minute (5-6.5 Hz. Gap junctions between intramyocardial graft and host tissue were identified histologically. The extensive coupling and rapid response rate of the human myocardial grafts after intramyocardial delivery suggest electrophysiological adaptation of hESC-derived cardiomyocytes to the rat heart's pacemaking activity. These data support the use of the rat model for studying electromechanical integration of human cardiomyocytes, and they

  9. Engine-integrated solid oxide fuel cells for efficient electrical power generation on aircraft

    Science.gov (United States)

    Waters, Daniel F.; Cadou, Christopher P.

    2015-06-01

    This work investigates the use of engine-integrated catalytic partial oxidation (CPOx) reactors and solid oxide fuel cells (SOFCs) to reduce fuel burn in vehicles with large electrical loads like sensor-laden unmanned air vehicles. Thermodynamic models of SOFCs, CPOx reactors, and three gas turbine (GT) engine types (turbojet, combined exhaust turbofan, separate exhaust turbofan) are developed and checked against relevant data and source material. Fuel efficiency is increased by 4% and 8% in the 50 kW and 90 kW separate exhaust turbofan systems respectively at only modest cost in specific power (8% and 13% reductions respectively). Similar results are achieved in other engine types. An additional benefit of hybridization is the ability to provide more electric power (factors of 3 or more in some cases) than generator-based systems before encountering turbine inlet temperature limits. A sensitivity analysis shows that the most important parameters affecting the system's performance are operating voltage, percent fuel oxidation, and SOFC assembly air flows. Taken together, this study shows that it is possible to create a GT-SOFC hybrid where the GT mitigates balance of plant losses and the SOFC raises overall system efficiency. The result is a synergistic system with better overall performance than stand-alone components.

  10. Enhancement of survival and electricity production in an engineered bacterium by light-driven proton pumping.

    Science.gov (United States)

    Johnson, Ethan T; Baron, Daniel B; Naranjo, Belén; Bond, Daniel R; Schmidt-Dannert, Claudia; Gralnick, Jeffrey A

    2010-07-01

    Microorganisms can use complex photosystems or light-dependent proton pumps to generate membrane potential and/or reduce electron carriers to support growth. The discovery that proteorhodopsin is a light-dependent proton pump that can be expressed readily in recombinant bacteria enables development of new strategies to probe microbial physiology and to engineer microbes with new light-driven properties. Here, we describe functional expression of proteorhodopsin and light-induced changes in membrane potential in the bacterium Shewanella oneidensis strain MR-1. We report that there were significant increases in electrical current generation during illumination of electrochemical chambers containing S. oneidensis expressing proteorhodopsin. We present evidence that an engineered strain is able to consume lactate at an increased rate when it is illuminated, which is consistent with the hypothesis that proteorhodopsin activity enhances lactate uptake by increasing the proton motive force. Our results demonstrate that there is coupling of a light-driven process to electricity generation in a nonphotosynthetic engineered bacterium. Expression of proteorhodopsin also preserved the viability of the bacterium under nutrient-limited conditions, providing evidence that fulfillment of basic energy needs of organisms may explain the widespread distribution of proteorhodopsin in marine environments.

  11. Concept Development and Meaningful Learning among Electrical Engineering Students Engaged in a Problem-Based Laboratory Experience

    Science.gov (United States)

    Bledsoe, Karen E.; Flick, Lawrence

    2012-01-01

    This phenomenographic study documented changes in student-held electrical concepts the development of meaningful learning among students with both low and high prior knowledge within a problem-based learning (PBL) undergraduate electrical engineering course. This paper reports on four subjects: two with high prior knowledge and two with low prior…

  12. Sex and Science: How Professor Gender Perpetuates the Gender Gap

    OpenAIRE

    Scott E. Carrell; Marianne E. Page; West, James E.

    2009-01-01

    Why aren't there more women in science? Female college students are currently 37 percent less likely than males to obtain a bachelor's degree in science, technology, engineering, and math (STEM), and comprise only 25 percent of the STEM workforce. This paper begins to shed light on this issue by exploiting a unique dataset of college students who have been randomly assigned to professors over a wide variety of mandatory standardized courses. We focus on the role of professor gender. Our resul...

  13. 75 FR 43099 - Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines

    Science.gov (United States)

    2010-07-23

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... (AD) for GE CT7-9C and -9C3 turboprop engines with certain serial number (S/ N) gas generator turbine...

  14. 76 FR 70382 - Airworthiness Directives; General Electric Company (GE) CF6-80C2B Series Turbofan Engines

    Science.gov (United States)

    2011-11-14

    ... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) CF6-80C2B Series Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... directive (AD) that applies to all GE CF6-80C2B series turbofan engines. The existing AD currently requires...

  15. 75 FR 70096 - Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines

    Science.gov (United States)

    2010-11-17

    ...-04-AD; Amendment 39-16509; AD 2010-23-20] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) CT7-9C and -9C3 Turboprop Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... result in an uncontained engine failure and damage to the airplane. DATES: This AD is effective December...

  16. H.E. Professor Dragoljub Popovic, Ambassador to Switzerland of the Federal Republic of Yugoslavia

    CERN Multimedia

    Patrice Loïez

    2001-01-01

    H. E. Professor Dragoljub Popovic, Ambassador of the Federal Republic of Yugoslavia to Switzerland, visiting the ATLAS cavern. From left to right: Dr Torsten Akesson, Deputy Spokesman of the ATLAS experiment; H. E. Professor Dragoljub Popovic; Mrs Simone Hajos, Project Engineer, LHC civil engineering; Dr Peter Adzic, Chairman of the Committee of the Republic of Serbia for relations with CERN.

  17. Professor Stewart's incredible numbers

    CERN Document Server

    Stewart, Ian

    2015-01-01

    Ian Stewart explores the astonishing properties of numbers from 1 to10 to zero and infinity, including one figure that, if you wrote it out, would span the universe. He looks at every kind of number you can think of - real, imaginary, rational, irrational, positive and negative - along with several you might have thought you couldn't think of. He explains the insights of the ancient mathematicians, shows how numbers have evolved through the ages, and reveals the way numerical theory enables everyday life. Under Professor Stewart's guidance you will discover the mathematics of codes,

  18. Experimental analysis of diffusion absorption refrigerator driven by electrical heater and engine exhaust gas

    Directory of Open Access Journals (Sweden)

    Mohamed Izzedine Serge ADJIBADE

    2017-09-01

    Full Text Available This work presents an experimental study of H20-NH3-H2 diffusion absorption refrigeration under two types of energy sources, i.e. the conventional electric energy from grid (electric and exhaust gas from internal combustion engine. Dynamic method is used to evaluate the behavior of the components of the system for both energy sources. Results obtained show that the performance of each component under different types of energy sources is almost coherent. For the generator, the electrical heater system requires more time to warm up, around three minutes, compared to the 40 s for system running with exhaust gas. For the evaporator, the decreasing rate is higher for the exhaust gas source and it took only about two hours to reach steady-state while for the electrical heat, the steady-state is reached after about seven hours of operation. For both energy sources, the evaporation temperature stabilizes to 3 °C and the minimum temperature to boil off ammonia is around 140 °C.

  19. Army symposium: Electrical energy engineering today; Wehrtechnisches Symposium: Moderne elektrische Energietechnik

    Energy Technology Data Exchange (ETDEWEB)

    Busse, H. (ed.) [Bundesakademie fuer Wehrverwaltung und Wehrtechnik, Mannheim (Germany). Fachgebiet Elektrotechnik und Elektroenergiewesen

    2000-05-01

    This symposium was held in Mannheim on May 20/21, 2000. All aspects of energy engineering were discussed, including electrochemical energy sources like accumulator batteries and fuel cells. The proceedings volume contains 26 papers which reflect the state of the art and current trends in electrical energy engineering in the German army. [German] Das Wehrtechnische Symposium 'Moderne elektrische Energietechnik' wurde von der Lehrabteilung Wehrtechnik der Bundesakademie fuer Wehrverwaltung und Wehrtechnik in Mannheim in der Zeit vom 20.05.-21.05.2000 durchgefuehrt. Das Programm enthaelt die aktuellen Themen der elektrischen Energietechnik. Die elektroschemischen Energiequellen (Batterien und Brennstoffzellen) wurden in das Programm integriert. Dadurch konnte das gesamte Spektrum der Energietechnik vielschichtig dargestellt und in der Diskussion unter z.T. sehr verschiedenen Gesichtspunkten beleuchtet werden. Die im vorliegenden Tagungsband abgedruckten 26 Skripte wurden weder gekuerzt noch ergaenzt. Sie zeigen insgesamt den aktuellen Stand und die erfolgversprechenden Entwicklungstendenzen der elektrischen Energietechnik in der Bundeswehr auf. (orig.)

  20. Material science. For electricians, information experts and electrical engineers; Werkstoffkunde. Fuer Elektrotechniker, Informationstechniker und Elektromaschinenbauer

    Energy Technology Data Exchange (ETDEWEB)

    Siegismund, H.

    1999-10-01

    This book of the series ``Die Meisterpruefung in der Elektrotechnik`` provides information on material science and components. Low redundancy in the subject matter enables efficient learning for examinations as well as fast access for the practician. Each chapter contains questions and answers for checking up on the knowledge gained. Subjects: Fundamentals; Materials and components in electrical engineering; Joints and contacts; Ferrous materials; Lubricants and roller bearings; Materials in electromechanical engineering; Gypsum and cement; Corrosion and corrosion protection. [Deutsch] Dieser vorliegende Band aus der Fachbuchreihe `Die Meisterpruefung in der Elektrotechnik` vermittelt die bei der Anwendung von Werkstoffen und Baulementen noetige Sachkenntnis. Die redundanzarme Stoffvermittlung ermoeglicht eine effiziente Pruefungsvorbereitung, aber auch dem Praktiker den schnellen Zugriff. Mit Fragen und Antworten zu jedem Kapitel kann eine Eigenkontrolle des erworbenen Wissens erfolgen. 1. Grundlagen, 2. Werkstoffe und Bauelemente der Elektrotechnik, 3. Verbindungen und Kontakte, 4. Eisenwerkstoffe, 5. Schmierstoffe und Waelzlager, 6. Werkstoffe im Elektromaschinenbau, 7. Gips und Zement und 8. Korrosion und Korrosionsschutz. (orig.)

  1. A Case Study of Modular-Based Project Oriented Learning in Electrical Engineering

    Science.gov (United States)

    Kuntalp, Damla Gürkan; Demir, Güleser Kalaycı; Akay, Olcay

    Considering the worldwide acceptance of problem/project-based learning methods, the Department of Electrical and Electronics Engineering at Dokuz Eylül University replaced its curriculum with a modular-based problem/project oriented one in Fall 2002. Current education system consists of sequentially given two, three or four week-long problem or project-based modules. Different from the conventional approach, in our system traditional courses are individually covered as independent modules given in sequential manner. While the first three years consist mainly of problem-based modules, senior year is purely project oriented. In this study, we present our experiences through the example of a senior year module. Our experience suggests that project-oriented learning in senior year is an effective method of teaching not only the theoretical or practical aspects of the subject matter but also the necessary qualities for real life experiences of soon-to-be engineers.

  2. Electric field and radio frequency measurements for rocket engine health monitoring applications

    Science.gov (United States)

    Valenti, Elizabeth L.

    1992-01-01

    Electric-field (EF) and radio-frequency (RF) emissions generated in the exhaust plumes of the diagnostic testbed facility thruster (DTFT) and the SSME are examined briefly for potential applications to plume diagnostics and engine health monitoring. Hypothetically, anomalous engine conditions could produce measurable changes in any characteristic EF and RF spectral signatures identifiable with a 'healthly' plumes. Tests to determine the presence of EF and RF emissions in the DTFT and SSME exhaust plumes were conducted. EF and RF emissions were detected using state-of-the-art sensors. Analysis of limited data sets show some apparent consistencies in spectral signatures. Significant emissions increases were detected during controlled tests using dopants injected into the DTFT.

  3. Detection and Elimination of a Potential Fire in Engine and Battery Compartments of Hybrid Electric Vehicles

    Directory of Open Access Journals (Sweden)

    Macam S. Dattathreya

    2012-01-01

    Full Text Available This paper presents a novel fuzzy deterministic noncontroller type (FDNCT system and an FDNCT inference algorithm (FIA. The FDNCT uses fuzzy inputs and produces a deterministic non-fuzzy output. The FDNCT is an extension and alternative for the existing fuzzy singleton inference algorithm. The research described in this paper applies FDNCT to build an architecture for an intelligent system to detect and to eliminate potential fires in the engine and battery compartments of a hybrid electric vehicle. The fuzzy inputs consist of sensor data from the engine and battery compartments, namely, temperature, moisture, and voltage and current of the battery. The system synthesizes the data and detects potential fires, takes actions for eliminating the hazard, and notifies the passengers about the potential fire using an audible alarm. This paper also presents the computer simulation results of the comparison between the FIA and singleton inference algorithms for detecting potential fires and determining the actions for eliminating them.

  4. Engineering quorum sensing signaling of Pseudomonas for enhanced wastewater treatment and electricity harvest: A review.

    Science.gov (United States)

    Yong, Yang-Chun; Wu, Xiang-Yang; Sun, Jian-Zhong; Cao, Ying-Xiu; Song, Hao

    2015-12-01

    Cell-cell communication that enables synchronized population behaviors in microbial communities dictates various biological processes. It is of great interest to unveil the underlying mechanisms of fine-tuning cell-cell communication to achieve environmental and energy applications. Pseudomonas is a ubiquitous microbe in environments that had wide applications in bioremediation and bioenergy generation. The quorum sensing (QS, a generic cell-cell communication mechanism) systems of Pseudomonas underlie the aromatics biodegradation, denitrification and electricity harvest. Here, we reviewed the recent progresses of the genetic strategies in engineering QS circuits to improve efficiency of wastewater treatment and the performance of microbial fuel cells. Copyright © 2014 Elsevier Ltd. All rights reserved.

  5. Convex Optimization for the Energy Management of Hybrid Electric Vehicles Considering Engine Start and Gearshift Costs

    Directory of Open Access Journals (Sweden)

    Tobias Nüesch

    2014-02-01

    Full Text Available This paper presents a novel method to solve the energy management problem for hybrid electric vehicles (HEVs with engine start and gearshift costs. The method is based on a combination of deterministic dynamic programming (DP and convex optimization. As demonstrated in a case study, the method yields globally optimal results while returning the solution in much less time than the conventional DP method. In addition, the proposed method handles state constraints, which allows for the application to scenarios where the battery state of charge (SOC reaches its boundaries.

  6. Tissue engineering bioreactor systems for applying physical and electrical stimulations to cells.

    Science.gov (United States)

    Jin, GyuHyun; Yang, Gi-Hoon; Kim, GeunHyung

    2015-05-01

    Bioreactor systems in tissue engineering applications provide various types of stimulation to mimic the tissues in vitro and in vivo. Various bioreactors have been designed to induce high cellular activities, including initial cell attachment, cell growth, and differentiation. Although cell-stimulation processes exert mostly positive effects on cellular responses, in some cases such stimulation can also have a negative effect on cultured cells. In this review, we discuss various types of bioreactor and the positive and negative effects of stimulation (physical, chemical, and electrical) on various cultured cell types. © 2014 Wiley Periodicals, Inc.

  7. Professor Alex Callinicos

    Directory of Open Access Journals (Sweden)

    Ali Saqer

    2016-04-01

    Full Text Available Professor Alex Callinicos is a renowned social theorist and scholar of international political economy. He conducts research on Marx and Marxism, European social and political theory, contemporary political philosophy, critical theory, historiography, and international political economy. His work provides invaluable insights on issues of race and racism, social justice, the Third Way, imperialism, austerity, and EU politics, among many other fascinating contemporary issues. Alex studied Philosophy, Politics, and Economics at Balliol College, Oxford, and Philosophy of Science at the London School of Economics before writing a DPhil on Marx's Capital, also at Balliol. He was a Junior Research Fellow in Contemporary Social Thought at St Peter's College, Oxford from 1979 to 1981, after which he taught social and political theory at the Department of Politics at the University of York until 2005, when he moved to King's College London. Alex is currently the Professor of European Studies at King's and editor of International Socialism. Alex has been an active contributor to the development of the movement for another globalization, participating in the World Social Forum and an animator of the European Social Forum. Among his best known books are The Revolutionary Ideas of Karl Marx (1983, Against Postmodernism (1990, Social Theory (1999, An Anti-Capitalist Manifesto (2003, The Resources of Critique (2006, Imperialism and Global Political Economy (2009. His most recent book is entitled Deciphering Capital: Marx’s Capital and its Destiny (2014.

  8. A comparison of Stirling engines for use with a 25 kW dish-electric conversion system

    Science.gov (United States)

    Shaltens, Richard K.

    1987-01-01

    Two designs for an advanced Stirling conversion system (ASCS) are described. The objective of the ASCS is to generate about 25 kW of electric power to an electric utility grid at an engine/alternator target cost of $300.00/kW at the manufacturing rate of 10,000 unit/yr. Both designs contain a free-piston Stirling engine (FPSE), a heat transport system, solar receiver, a means to generate electric power, the necessary auxiliaries, and a control system. The major differences between the two concepts are: one uses a 25 kWe single-piston FPSE which incorporates a linear alternator to directly convert the energy to electricity on the utility grid; and in the second design, electrical power is generated indirectly using a hydraulic output to a ground based hydraulic motor coupled to a rotating alternator. Diagrams of the two designs are presented.

  9. Savannah River Plant, Project 8980: Engineering and design history of power and electrical facilities. Volume 6

    Energy Technology Data Exchange (ETDEWEB)

    1957-01-01

    This section of the Engineering-and Design History presents a comprehensive account of the planning and extensive evaluation of the problems involved in reaching basic decisions for the design and installation of power facilities at the Savannah River Plant. The problems were complicated by the urgency of Pro. viding early start-up of facilities at a time when critical material shortages were acute, combined with basic requirements for reliable operation and unusual degrees of flexibility to meet a variety of production demands. Part I describes in detail the steam and water facilities, alternative schemes, and other considerations which were evaluated as a prelude to the final design of equipment and facilities. Included are discussions relating to steam boiler installations, electric power generation, diesel engine plants, mater supply for cooling, process and domestic use, and the numerous water treatment procedures employed for specific application. A comprehensive description of the development and design of electric power facilities is presented in Part II of this volume.

  10. Virtual reality as a new trend in mechanical and electrical engineering education

    Science.gov (United States)

    Kamińska, Dorota; Sapiński, Tomasz; Aitken, Nicola; Rocca, Andreas Della; Barańska, Maja; Wietsma, Remco

    2017-12-01

    In their daily practice, academics frequently face lack of access to modern equipment and devices, which are currently in use on the market. Moreover, many students have problems with understanding issues connected to mechanical and electrical engineering due to the complexity, necessity of abstract thinking and the fact that those concepts are not fully tangible. Many studies indicate that virtual reality can be successfully used as a training tool in various domains, such as development, health-care, the military or school education. In this paper, an interactive training strategy for mechanical and electrical engineering education shall be proposed. The prototype of the software consists of a simple interface, meaning it is easy for comprehension and use. Additionally, the main part of the prototype allows the user to virtually manipulate a 3D object that should be analyzed and studied. Initial studies indicate that the use of virtual reality can contribute to improving the quality and efficiency of higher education, as well as qualifications, competencies and the skills of graduates, and increase their competitiveness in the labour market.

  11. Engineering manual. A practical reference of design methods and data in building systems, chemical, civil, electrical, mechanical, and environmental engineering and energy conversion

    Energy Technology Data Exchange (ETDEWEB)

    Perry, R.H. (ed.)

    1976-01-01

    Following 3 chapters of general reference information for engineers which include mathematics and mathematical tables, heat transfer, fluid flow, and basic thermodynamics, and data on the chemical, mechanical, and physical properties of materials, 7 chapters of data and design methods for specific engineering fields, i.e., architectural or building systems, chemical, civil, electrical, mechanical, environmental, and for energy conversion are presented. A subject index is included. (LCL)

  12. A Cloverleaf of Software Engineering

    DEFF Research Database (Denmark)

    Bjørner, Dines

    2005-01-01

    by senior academic staff. Professors of medicine daily perform specialized surgery and treatments at hospitals. Professors of architecture design new, daring buildings for industry, and professors of civil engineering head the engineering structural design of new, daring bridges. So we speculate what...

  13. Electrifying white biotechnology: engineering and economic potential of electricity-driven bio-production.

    Science.gov (United States)

    Harnisch, Falk; Rosa, Luis F M; Kracke, Frauke; Virdis, Bernardino; Krömer, Jens O

    2015-03-01

    The production of fuels and chemicals by electricity-driven bio-production (i.e., using electric energy to drive biosynthesis) holds great promises. However, this electrification of white biotechnology is particularly challenging to achieve because of the different optimal operating conditions of electrochemical and biochemical reactions. In this article, we address the technical parameters and obstacles to be taken into account when engineering microbial bioelectrochemical systems (BES) for bio-production. In addition, BES-based bio-production processes reported in the literature are compared against industrial needs showing that a still large gap has to be closed. Finally, the feasibility of BES bio-production is analysed based on bulk electricity prices. Using the example of lysine production from sucrose, we demonstrate that there is a realistic market potential as cost savings of 8.4 % (in EU) and 18.0 % (in US) could be anticipated, if the necessary yields can be obtained. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Voorwoord: Professor Andrzej Borowski

    Directory of Open Access Journals (Sweden)

    Koch Jerzy

    2015-11-01

    Full Text Available Professor Andrzej Borowski from the Jagiellonian University, whose 70th anniversary we celebrate this year, is a very well known scholar and literature historian, specialised in Old Polish Literature (Middle Ages, Renaissance and Baroque - and with a background from Classical studies. A lesser known fact is that he also is a scholar active in the field of the Netherlandish (Dutch and Flemish literature and culture: as author of numerous books and articles about (South Netherlandish figures from the 16th and 17th century, as supervisor of numerous dissertations or habilitations in the field of the Netherlandish literature and as an inspiring personality in the field of the Netherlandish studies at Polish universities. He can indeed be seen as the Spiritus Litterarum Neerlandicorum in Poland.

  15. Modeling and Simulation of a Free-Piston Engine with Electrical Generator Using HCCI Combustion

    Science.gov (United States)

    Alrbai, Mohammad

    Free-piston engines have the potential to challenge the conventional crankshaft engines by their design simplicity and higher operational efficiency. Many studies have been performed to overcome the limitations of the free-piston devices especially the stability and control issues. The investigations within the presented dissertation aim to satisfy many objectives by employing the approach of chemical kinetics to present the combustion process in the free-piston engine. This approach in addition to its advanced accuracy over the empirical methods, it has many other features like the ability to analyze the engine emissions. The effect of the heat release rate (HRR) on the engine performance is considered as the main objective. Understanding the relation between the HRR and the piston dynamics helps in enhancing the system efficiency and identifying the parameters that affect the overall performance. The dissertation covers some other objectives that belongs to the combustion phasing. Exhaust gas recirculation (EGR), equivalence ratio and the intake temperature represent the main combustion parameters, which have been discussed in this dissertation. To obtain the stability in system performance, the model requires a proper controller to simulate the operation and manage the different system parameters; for this purpose, different controlling techniques have been employed. In addition, the dissertation considers some other topics like engine emissions, fuels and fuels mechanisms. The model of the study describes the processes within a single cylinder, two stroke engine, which includes springs to support higher frequencies, reduce cyclic variations and sustain the engine compression ratio. An electrical generator presents the engine load; the generator supports different load profiles and play the key role in controlling the system. The 1st law of thermodynamics and Newton's 2nd law are applied to couple the piston dynamics with the engine thermodynamics. The model

  16. Comparison of Stirling engines for use with a 25-kW disk-electric conversion system

    Science.gov (United States)

    Shaltens, Richard K.

    1987-01-01

    Heat engines were evaluated for terrestrial solar heat receivers. The Stirling Engine was identified as one of the most promising engines for terrestrial applications. The potential to meet the Department of Energy (DOE) goals for performance and cost can be met by the free-piston Stirling engine. NASA Lewis is providing technical management for an Advanced Stirling Conversion System (ASCS) through a cooperative interagency agreement with DOE. Parallel contracts were awarded for conceptual designs of an ASCS. Each design will feature a free-piston Stirling engine, a liquid-metal heat pipe receiver, and a means to provide about 25 kW of electric power to a utility grid while meeting long-term performance and goals. The Mechanical Technology, Ins. (MTI) design incorporates a linear alternator to directly convert the solar energy to electricity while the Stirling Technology Company (STC) generates electrical power indirectly by using a hydraulic output to a ground-bases hydraulic pump/motor coupled to a rotating alternator. Both designs use technology which can reasonably be expected to be available in the 1980's. The ASCS designs using a free-piston Stirling engine, a heat transport system, a receiver, and the methods of providing electricity to the utility grid will be discussed.

  17. System-Level Value of a Gas Engine Power Plant in Electricity and Reserve Production

    Directory of Open Access Journals (Sweden)

    Antti Alahäivälä

    2017-07-01

    Full Text Available Power systems require a certain amount of flexibility to meet varying demand and to be able to cope with unexpected events, and this requirement is expected to increase with the emergence of variable power generation. In this paper, we focus on gas engine power plant technology and the beneficial influence its flexible operation can have on a power system. The study introduces the concept of a combined-cycle gas engine power plant (CCGE, which comprises a combination of several gas-fired combustion engines and a steam turbine. The operation of CCGE is then comprehensively analyzed in electricity and reserve production in the South African power system and compared with combined-cycle gas turbine (CCGT technology. Even though CCGE is a form of technology that has already been commercialized, it is rarely considered as a source of flexibility in the academic research. That is the notion providing the motivation for this study. Our core contribution is to show that the flexibility of CCGE can be valuable in power systems. The methodology is based on the unit-level model of the studied system and the solving of a day-ahead unit commitment problem for each day of the simulated 11-year period. The simulation studies reveal how a CCGE is able to offer system flexibility to follow hourly load variations and capacity to provide reserve power effectively.

  18. Bulletin of the Division of Electrical Engineering, 1987-1988, volume 3, number 2

    Science.gov (United States)

    1988-05-01

    A report is provided on the activities of the Division of Electrical Engineering of the National Research Council of Canada. The Division engages in the development of standards and test procedures, and undertakes applied research in support of Canadian industry, government departments, and universities. Technology transfer and collaborative research continue to grow in importance as focuses of Division activities. The Division is comprised of three sections: the Laboratory for Biomedical Engineering, the Laboratory for Electromagnetic and Power Engineering, and the Laboratory for Intelligent Systems. An agreement has been reached to commercially exploit the realtime multiprocessor operating system Harmony. The dielectrics group has made contract research agreements with industry from both Canada and the United States. The possibility of employing a new advanced laser vision camera, which can be mounted on a robot arm in a variety of industrial applications is being explored. Potential short-term spinoffs related to intelligent wheelchairs are being sought as part of the new interlaboratory program which has as its long-term objective the development of a mobile robot for health care applications. A program in applied artificial intelligence has been established. Initiatives in collaboration with outside groups include proposals for major institutes in areas ranging from police and security research to rehabilitation research, programs to enhance Canadian industrial competence working with the Canadian Manufacturers' Association and other government departments, and approaches to the utilization of existing facilities which will make them more valuable without significant financial expenditures.

  19. EXPERIMENTAL INVESTIGATION OF COLD START EMISSIONS USING ELECTRICALLY HEATED CATALYSTS IN A SPARK IGNITION ENGINE

    Directory of Open Access Journals (Sweden)

    K. Bhaskar

    2010-12-01

    Full Text Available The population of spark-ignition vehicles in urban areas is very high and is increasing rapidly due to their convenience for short distance transportation. These vehicles are major sources of urban air pollution compared to vehicles with diesel engines. Catalytic converters are used to control their emissions but they attain their maximum conversion rates of about 80%¬–90% under optimum operating conditions and are not effective during cold start conditions. The objective of the present work is to demonstrate that an electrically heated catalyst (EHC in combination with a traditional converter can achieve the Low and Ultra Low Emission Vehicle (LEV, ULEV standards. Experiments were conducted to investigate the impact of various metal oxides in EHC and design parameters to reduce cold-start emissions of a multi-cylinder SI engine. It is observed that EHC reduces cold-start hydrocarbon and carbon monoxide emissions when used with an existing catalytic converter. The maximum CO and HC reductions were achieved with copper oxide as the catalyst in EHC with air injection of 80 lpm for 40 sec after cold start of the engine.

  20. PREFACE: Special section on Computational Fluid Dynamics—in memory of Professor Kunio Kuwahara Special section on Computational Fluid Dynamics—in memory of Professor Kunio Kuwahara

    Science.gov (United States)

    Ishii, Katsuya

    2011-08-01

    This issue includes a special section on computational fluid dynamics (CFD) in memory of the late Professor Kunio Kuwahara, who passed away on 15 September 2008, at the age of 66. In this special section, five articles are included that are based on the lectures and discussions at `The 7th International Nobeyama Workshop on CFD: To the Memory of Professor Kuwahara' held in Tokyo on 23 and 24 September 2009. Professor Kuwahara started his research in fluid dynamics under Professor Imai at the University of Tokyo. His first paper was published in 1969 with the title 'Steady Viscous Flow within Circular Boundary', with Professor Imai. In this paper, he combined theoretical and numerical methods in fluid dynamics. Since that time, he made significant and seminal contributions to computational fluid dynamics. He undertook pioneering numerical studies on the vortex method in 1970s. From then to the early nineties, he developed numerical analyses on a variety of three-dimensional unsteady phenomena of incompressible and compressible fluid flows and/or complex fluid flows using his own supercomputers with academic and industrial co-workers and members of his private research institute, ICFD in Tokyo. In addition, a number of senior and young researchers of fluid mechanics around the world were invited to ICFD and the Nobeyama workshops, which were held near his villa, and they intensively discussed new frontier problems of fluid physics and fluid engineering at Professor Kuwahara's kind hospitality. At the memorial Nobeyama workshop held in 2009, 24 overseas speakers presented their papers, including the talks of Dr J P Boris (Naval Research Laboratory), Dr E S Oran (Naval Research Laboratory), Professor Z J Wang (Iowa State University), Dr M Meinke (RWTH Aachen), Professor K Ghia (University of Cincinnati), Professor U Ghia (University of Cincinnati), Professor F Hussain (University of Houston), Professor M Farge (École Normale Superieure), Professor J Y Yong (National

  1. Development and characterization of novel electrically conductive PANI-PGS composites for cardiac tissue engineering applications.

    Science.gov (United States)

    Qazi, Taimoor H; Rai, Ranjana; Dippold, Dirk; Roether, Judith E; Schubert, Dirk W; Rosellini, Elisabetta; Barbani, Niccoletta; Boccaccini, Aldo R

    2014-06-01

    Cardiovascular diseases, especially myocardial infarction, are the leading cause of morbidity and mortality in the world, also resulting in huge economic burdens on national economies. A cardiac patch strategy aims at regenerating an infarcted heart by providing healthy functional cells to the injured region via a carrier substrate, and providing mechanical support, thereby preventing deleterious ventricular remodeling. In the present work, polyaniline (PANI) was doped with camphorsulfonic acid and blended with poly(glycerol-sebacate) at ratios of 10, 20 and 30vol.% PANI content to produce electrically conductive composite cardiac patches via the solvent casting method. The composites were characterized in terms of their electrical, mechanical and physicochemical properties. The in vitro biodegradability of the composites was also evaluated. Electrical conductivity increased from 0Scm(-1) for pure PGS to 0.018Scm(-1) for 30vol.% PANI-PGS samples. Moreover, the conductivities were preserved for at least 100h post fabrication. Tensile tests revealed an improvement in the elastic modulus, tensile strength and elasticity with increasing PANI content. The degradation products caused a local drop in pH, which was higher in all composite samples compared with pure PGS, hinting at a buffering effect due to the presence of PANI. Finally, the cytocompatibility of the composites was confirmed when C2C12 cells attached and proliferated on samples with varying PANI content. Furthermore, leaching of acid dopants from the developed composites did not have any deleterious effect on the viability of C2C12 cells. Taken together, these results confirm the potential of PANI-PGS composites for use as substrates to modulate cellular behavior via electrical stimulation, and as biocompatible scaffolds for cardiac tissue engineering applications. Copyright © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

  2. MoS2/MX2 heterobilayers: bandgap engineering via tensile strain or external electrical field.

    Science.gov (United States)

    Lu, Ning; Guo, Hongyan; Li, Lei; Dai, Jun; Wang, Lu; Mei, Wai-Ning; Wu, Xiaojun; Zeng, Xiao Cheng

    2014-03-07

    We have performed a comprehensive first-principles study of the electronic and magnetic properties of two-dimensional (2D) transition-metal dichalcogenide (TMD) heterobilayers MX2/MoS2 (M = Mo, Cr, W, Fe, V; X = S, Se). For M = Mo, Cr, W; X = S, Se, all heterobilayers show semiconducting characteristics with an indirect bandgap with the exception of the WSe2/MoS2 heterobilayer which retains the direct-bandgap character of the constituent monolayer. For M = Fe, V; X = S, Se, the MX2/MoS2 heterobilayers exhibit metallic characters. Particular attention of this study has been focused on engineering the bandgap of the TMD heterobilayer materials via application of either a tensile strain or an external electric field. We find that with increasing either the biaxial or uniaxial tensile strain, the MX2/MoS2 (M = Mo, Cr, W; X = S, Se) heterobilayers can undergo a semiconductor-to-metal transition. For the WSe2/MoS2 heterobilayer, a direct-to-indirect bandgap transition may occur beyond a critical biaxial or uniaxial strain. For M (=Fe, V) and X (=S, Se), the magnetic moments of both metal and chalcogen atoms are enhanced when the MX2/MoS2 heterobilayers are under a biaxial tensile strain. Moreover, the bandgap of MX2/MoS2 (M = Mo, Cr, W; X = S, Se) heterobilayers can be reduced by the vertical electric field. For two heterobilayers MSe2/MoS2 (M = Mo, Cr), PBE calculations suggest that the indirect-to-direct bandgap transition may occur under an external electric field. The transition is attributed to the enhanced spontaneous polarization. The tunable bandgaps in general and possible indirect-direct bandgap transitions due to tensile strain or external electric field make the TMD heterobilayer materials a viable candidate for optoelectronic applications.

  3. Internal combustion engine to electric vehicle. Four alternative techniques; Del motor de combustion internal al vehiculo electrico. Cuatro alternativas tecnicas

    Energy Technology Data Exchange (ETDEWEB)

    Alaez, R.; Barneto, M.; Gil, C.; Longas, J. C.; Lucea, J.; Ullibarri, M.; Bilbao, J.; Camino, V.; Intxaurburu, G.

    2010-07-01

    Auto makers are now developing alternatives to internal combustion engines. The present paper provides an analysis of four alternative vehicles: electric hybrids, full electric vehicles, hydrogen fuel cells and hydrogen vehicles. The paper focuses on the adoption dynamics for alternative vehicles. The spatial implications of this process for the organization of the value chain and the auto makers alliances linked to the alternatives development are also considered. (Author) 14 refs.

  4. Inverted Classroom by Topic - A Study in Mathematics for Electrical Engineering Students

    Directory of Open Access Journals (Sweden)

    Isabel Braun

    2014-06-01

    Full Text Available The inverted classroom is a teaching model, where the students prepare for classroom by watching video lectures. The classroom time is then dedicated to individual practice. We evaluated a mathematics course for electrical engineering students throughout three semesters, where 20% of the topics were taught using the inverted classroom model. The aim was to find out whether the model can help to better address groups with large differences in prior knowledge in mathematics. We report mainly positive feedback from the students, although the opinions vary greatly between the groups. The students appreciate the increased amount of practice in the classroom as well as the possibility to learn at their own pace. Exam performance remained constant in the topics taught using the inverted classroom compared to previous semesters. The exam performance of weaker students also remained constant.

  5. Instructional Design to Develop Communication Ability for Students in the Electrical Engineering Majors

    Science.gov (United States)

    Nakano, Mika; Takahara, Kenji; Kajiwara, Toshinori

    This paper describes the instructional design to develop communication ability for students in the electrical engineering majors. It is based on the case of Fukuoka Institute of Technology which started new courses for communication skills in 2007. A series of communication education from the freshman year to the third grade is systematized, considering the developmental process of students' argumentation. In the classes, students continually learn dialogue and cooperation through various styles of discussion, debate, presentation and so on. The first introductory class of all is “Communication Theory I”, which is aimed at developing self-awareness and improving discussion skills for interpersonal relationship. In this course, students acquire skills to construct their arguments about the given issues and to evaluate others' presentation performances each other. To cultivate students' communication ability, education should not be closed in a class, but support system from departmental level is essential.

  6. Enhancement of Intercellular Electrical Synchronization by Conductive Materials in Cardiac Tissue Engineering.

    Science.gov (United States)

    Wu, Yu; Guo, Liang

    2017-10-15

    cardiac tissue regeneration for the treatment of cardiovascular diseases has been of great research interest. Under the hypothesis that electrical synchronization of cardiac cells can be aided by conductive materials, electrically conductive scaffolds have been frequently used to improve cardiac tissue regeneration. However, theoretical analysis is presently absent in examining the underlying mechanism and rationally guiding the design of these conductive scaffolds. here, equivalent-circuit models are proposed, in which two adjacent groups of cardiomyocytes are grown either on a bulk conductive substrate or around conductive nanostructures. When one group of cells leads with action potentials, the membrane depolarization of the following group is investigated. this study reveals that membrane depolarization of the following group is most sensitive to seal resistance to the substrate while surface roughness and conductivity of the material have less influence. In addition, it is found that a multiple-cell group is easier to be depolarized by its adjacent beating cardiomyocytes. For nanostructure-bridged cardiac cells, substantial depolarization occurs only with a seal resistance larger than 10 Ω/sqr, which is contradictory to many reported estimations. this work theoretically confirms the positive role of conductive scaffolds and nanostructures in aiding electrical synchronization of cardiac cells and reveals that its performance mainly relies on the cell-device interface. this work provides a theoretical basis for the rational design of electroactive scaffolds for enhanced cardiac tissue engineering. cardiac tissue regeneration for the treatment of cardiovascular diseases has been of great research interest. Under the hypothesis that electrical synchronization of cardiac cells can be aided by conductive materials, electrically conductive scaffolds have been frequently used to improve cardiac tissue regeneration. However, theoretical analysis is presently absent in

  7. Strain Engineered CaBi2Nb2O9 Thin Films with Enhanced Electrical Properties.

    Science.gov (United States)

    Zhang, Yunxiang; Ouyang, Jun; Zhang, Jincan; Li, Yao; Cheng, Hongbo; Xu, Huiwen; Liu, Menglin; Cao, Zhao-Peng; Wang, Chun-Ming

    2016-07-06

    In this work, strain engineered polycrystalline thin films (∼250 nm) of bismuth layer-structured ferroelectric (BLSF) CaBi2Nb2O9 (CBNO) were prepared by using a radio frequency (RF) magnetron sputtering technique. XRD analysis revealed that the films were (200)/(020) and (00l) textured with a large in-plane tensile stress. Cross-sectional TEM analyses confirmed the bismuth layered-structure, as well as crystalline orientations and a strain-controlled growth mode of the grains. Result of a quantitative XPS analysis revealed that the composition of the film is close to the chemical stoichiometry. Excellent electrical properties were achieved in the CBNO films, including a high dielectric constant (∼280 @5 kHz), a small dielectric loss (tgδ ≤ 1.6% up to an applied electric field of ∼1200 kV/cm) and a large polarization (Pr ≈ 14 μC/cm(2) @ 1 kHz).

  8. Electrically conductive gold nanoparticle-chitosan thermosensitive hydrogels for cardiac tissue engineering

    Energy Technology Data Exchange (ETDEWEB)

    Baei, Payam [Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran (Iran, Islamic Republic of); Cardiovascular Engineering Laboratory, Faculty of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran (Iran, Islamic Republic of); Jalili-Firoozinezhad, Sasan [Department of Biomedicine and Surgery, University Hospital Basel, University of Basel, Hebelstrasse 20, CH-4031 Basel (Switzerland); Department of Bioengineeringand IBB - Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa (Portugal); Rajabi-Zeleti, Sareh [Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran (Iran, Islamic Republic of); Tafazzoli-Shadpour, Mohammad [Cardiovascular Engineering Laboratory, Faculty of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran (Iran, Islamic Republic of); Baharvand, Hossein, E-mail: Baharvand@royaninstitute.org [Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran (Iran, Islamic Republic of); Department of Developmental Biology, University of Science and Culture, ACECR, Tehran (Iran, Islamic Republic of); Aghdami, Nasser, E-mail: Nasser.Aghdami@royaninstitute.org [Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran (Iran, Islamic Republic of)

    2016-06-01

    Injectable hydrogels that resemble electromechanical properties of the myocardium are crucial for cardiac tissue engineering prospects. We have developed a facile approach that uses chitosan (CS) to generate a thermosensitive conductive hydrogel with a highly porous network of interconnected pores. Gold nanoparticles (GNPs) were evenly dispersed throughout the CS matrix in order to provide electrical cues. The gelation response and electrical conductivity of the hydrogel were controlled by different concentrations of GNPs. The CS-GNP hydrogels were seeded with mesenchymal stem cells (MSCs) and cultivated for up to 14 days in the absence of electrical stimulations. CS-GNP scaffolds supported viability, metabolism, migration and proliferation of MSCs along with the development of uniform cellular constructs. Immunohistochemistry for early and mature cardiac markers showed enhanced cardiomyogenic differentiation of MSCs within the CS-GNP compared to the CS matrix alone. The results of this study demonstrate that incorporation of nanoscale electro-conductive GNPs into CS hydrogels enhances the properties of myocardial constructs. These constructs could find utilization for regeneration of other electroactive tissues. - Highlights: • Thermosensitive electro-conductive hydrogels were prepared from CS and GNPs. • Gelation time and conductivity were tuned by varying concentration of GNPs. • CS-2GNP with gelation time of 25.7 min and conductivity of 0.13 S·m{sup −1} was selected for in vitro studies. • CS-2GNP supported active metabolism, migration and proliferation of MSCs. • Expression of cardiac markers increased about two-fold in CS-2GNP compared to CS.

  9. Efficient design of multituned transmission line NMR probes: the electrical engineering approach.

    Science.gov (United States)

    Frydel, J A; Krzystyniak, M; Pienkowski, D; Pietrzak, M; de Sousa Amadeu, N; Ratajczyk, T; Idzik, K; Gutmann, T; Tietze, D; Voigt, S; Fenn, A; Limbach, H H; Buntkowsky, G

    2011-01-01

    Transmission line-based multi-channel solid state NMR probes have many advantages regarding the cost of construction, number of RF-channels, and achievable RF-power levels. Nevertheless, these probes are only rarely employed in solid state-NMR-labs, mainly owing to the difficult experimental determination of the necessary RF-parameters. Here, the efficient design of multi-channel solid state MAS-NMR probes employing transmission line theory and modern techniques of electrical engineering is presented. As technical realization a five-channel ((1)H, (31)P, (13)C, (2)H and (15)N) probe for operation at 7 Tesla is described. This very cost efficient design goal is a multi port single coil transmission line probe based on the design developed by Schaefer and McKay. The electrical performance of the probe is determined by measuring of Scattering matrix parameters (S-parameters) in particular input/output ports. These parameters are compared to the calculated parameters of the design employing the S-matrix formalism. It is shown that the S-matrix formalism provides an excellent tool for examination of transmission line probes and thus the tool for a rational design of these probes. On the other hand, the resulting design provides excellent electrical performance. From a point of view of Nuclear Magnetic Resonance (NMR), calibration spectra of particular ports (channels) are of great importance. The estimation of the π/2 pulses length for all five NMR channels is presented. Copyright © 2011 Elsevier Inc. All rights reserved.

  10. The Profession and the Professors.

    Science.gov (United States)

    Dain, Phyllis

    1980-01-01

    Speculates on why graduate library schools have not, in the persons of their professors, produced theoretical leadership in Library Science. The ideals of professional ethical standards are contrasted with present practice. (RAA)

  11. Response to Professor Jean Guichard

    OpenAIRE

    Kargulowa, Alicja; Czerkawska, Alicja; Kłodkowska, Joanna; Siarkiewicz, Elżbieta; Zielińska-Pękał, Daria; Zierkiewicz, Edyta

    2013-01-01

    The article recounts a discussion inspired by Professor Jean Guichard’s letter to Professor Alicja Kargulowa. Its participants – a group of female counsellogists – are engaged in an e-mail exchange that freely unfolds in the symbolic space of the on-line discourse. Embedded in their own specific research, their contributions depart from a conventional, structured line of argumentation, spontaneously, and at the same time insightfully, reflecting on various facets of purification and translati...

  12. Interdisciplinary Team-Teaching Experience for a Computer and Nuclear Energy Course for Electrical and Computer Engineering Students

    Science.gov (United States)

    Kim, Charles; Jackson, Deborah; Keiller, Peter

    2016-01-01

    A new, interdisciplinary, team-taught course has been designed to educate students in Electrical and Computer Engineering (ECE) so that they can respond to global and urgent issues concerning computer control systems in nuclear power plants. This paper discusses our experience and assessment of the interdisciplinary computer and nuclear energy…

  13. Integrated Sensing and Information Processing Theme-Based Redesign of the Undergraduate Electrical and Computer Engineering Curriculum at Duke University

    Science.gov (United States)

    Ybarra, Gary A.; Collins, Leslie M.; Huettel, Lisa G.; Brown, April S.; Coonley, Kip D.; Massoud, Hisham Z.; Board, John A.; Cummer, Steven A.; Choudhury, Romit Roy; Gustafson, Michael R.; Jokerst, Nan M.; Brooke, Martin A.; Willett, Rebecca M.; Kim, Jungsang; Absher, Martha S.

    2011-01-01

    The field of electrical and computer engineering has evolved significantly in the past two decades. This evolution has broadened the field of ECE, and subfields have seen deep penetration into very specialized areas. Remarkable devices and systems arising from innovative processes, exotic materials, high speed computer simulations, and complex…

  14. Important Role of the Hall Effect Measurement System in a Modified Course of Materials in Electrical Engineering

    Science.gov (United States)

    Stojanovic, G.; Savic, S.; Zivanov, L.

    2009-01-01

    The course "Materials in Electrical Engineering" is a core course in the Mechatronics curriculum at the Faculty of Technical Sciences, University of Novi Sad, Serbia. In the past, this course was comprehensive and mainly theory-based. Teaching methods used in this course had not been changed for many years, and were mainly based on a…

  15. Robert Beichner joins university as American Council of Education Fellow and visiting professor of physics

    OpenAIRE

    Owczarski, Mark

    2010-01-01

    Robert Beichner, Alumni Distinguished Professor of Physics and director of the Science, Technology, Engineering and Mathematics Education Initiative at North Carolina State University, will spend the fall semester as the American Council of Education Fellow and visiting professor of physics in the College of Science.

  16. Engineering skeletal muscle tissues from murine myoblast progenitor cells and application of electrical stimulation.

    Science.gov (United States)

    van der Schaft, Daisy W J; van Spreeuwel, Ariane C C; Boonen, Kristel J M; Langelaan, Marloes L P; Bouten, Carlijn V C; Baaijens, Frank P T

    2013-03-19

    Engineered muscle tissues can be used for several different purposes, which include the production of tissues for use as a disease model in vitro, e.g. to study pressure ulcers, for regenerative medicine and as a meat alternative (1). The first reported 3D muscle constructs have been made many years ago and pioneers in the field are Vandenburgh and colleagues (2,3). Advances made in muscle tissue engineering are not only the result from the vast gain in knowledge of biochemical factors, stem cells and progenitor cells, but are in particular based on insights gained by researchers that physical factors play essential roles in the control of cell behavior and tissue development. State-of-the-art engineered muscle constructs currently consist of cell-populated hydrogel constructs. In our lab these generally consist of murine myoblast progenitor cells, isolated from murine hind limb muscles or a murine myoblast cell line C2C12, mixed with a mixture of collagen/Matrigel and plated between two anchoring points, mimicking the muscle ligaments. Other cells may be considered as well, e.g. alternative cell lines such as L6 rat myoblasts (4), neonatal muscle derived progenitor cells (5), cells derived from adult muscle tissues from other species such as human (6) or even induced pluripotent stem cells (iPS cells) (7). Cell contractility causes alignment of the cells along the long axis of the construct (8,9) and differentiation of the muscle progenitor cells after approximately one week of culture. Moreover, the application of electrical stimulation can enhance the process of differentiation to some extent (8). Because of its limited size (8 x 2 x 0.5 mm) the complete tissue can be analyzed using confocal microscopy to monitor e.g. viability, differentiation and cell alignment. Depending on the specific application the requirements for the engineered muscle tissue will vary; e.g. use for regenerative medicine requires the up scaling of tissue size and vascularization, while

  17. 76 FR 30573 - Airworthiness Directives; General Electric Company (GE) GE90-110B1 and GE90-115B Turbofan Engines

    Science.gov (United States)

    2011-05-26

    ... Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with high-pressure compressor (HPC) stages... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) GE90- 110B1 and GE90-115B Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT...

  18. Influence of thermodynamic mechanism of inter- facial adsorption on purifying air-conditioning engineering under intensification of electric field

    Directory of Open Access Journals (Sweden)

    Chen Yun-Yu

    2016-12-01

    Full Text Available As a kind of mass transfer process as well as the basis of separating and purifying mixtures, interfacial adsorption has been widely applied to fields like chemical industry, medical industry and purification engineering in recent years. Influencing factors of interfacial adsorption, in addition to the traditional temperature, intensity of pressure, amount of substance and concentration, also include external fields, such as magnetic field, electric field and electromagnetic field, etc. Starting from the point of thermodynamics and taking the Gibbs adsorption as the model, the combination of energy axiom and the first law of thermodynamics was applied to boundary phase, and thus the theoretical expression for the volume of interface absorption under electric field as well as the mathematical relationship between surface tension and electric field intensity was obtained. In addition, according to the obtained theoretical expression, the volume of interface absorption of ethanol solution under different electric field intensities and concentrations was calculated. Moreover, the mechanism of interfacial adsorption was described from the perspective of thermodynamics and the influence of electric field on interfacial adsorption was explained reasonably, aiming to further discuss the influence of thermodynamic mechanism of interfacial adsorption on purifying air-conditioning engineering under intensification of electric field.

  19. Chemical Engineering Education Revisited.

    Science.gov (United States)

    Theodore, Louis

    1978-01-01

    The opinion is presented that chemical engineering education seems to emphasize the professor's research and/or professional interests with little regard for the real needs of the student who intends to become a practicing engineer. (BB)

  20. TIME MANAGEMENT SKILLS IN HIGHER INSTITUTIONS: A CASE STUDY OF ELECTRICAL, ELECTRONIC & SYSTEMS ENGINEERING UNDERGRADUATE STUDENTS

    Directory of Open Access Journals (Sweden)

    NORBAHIAH MISRAN

    2016-11-01

    Full Text Available Time management is an important skill that every student in higher education institutions should acquire since it is one of the key factors in assuring excellent achievement in academic. Students with poor time-management skills are far more likely to be tressed and, as a result, have a negative impact on the quality of life. Thus, this paper discusses this issue based on a study among students of Electrical, Electronic & System Engineering at Universiti Kebangsaan Malaysia according to year of study and then establishes the relationship with the student's academic performance. Data were collected using a set of questionnaire carried out on 272 undergraduate students from year one to year four for 2015/2016 session. These data were then analysed using ANOVA statistical inference and Pearson correlations. Results revealed that time management skills of the respondents were at moderate level and established a negative correlation with year of study. This study also found significant findings where time management skills have a positive but weak correlation with student’s academic performance. These findings suggest the need for additional research to further refine the justifications of these measures. The university is also anticipated to provide a good platform for students to develop their time management skills at the early stage of their admission to university.

  1. THE EFFECTIVENESS OF WEB-BASED INTERACTIVE BLENDED LEARNING MODEL IN ELECTRICAL ENGINEERING COURSES

    Directory of Open Access Journals (Sweden)

    Hansi Effendi

    2015-12-01

    Full Text Available The study was to test the effectiveness of the Web-Based Interactive Blended Learning Model (BLIBW for subjects in the Department of Electrical Engineering, Padang State University. The design that the researcher employed was a quasi-experimental design with one group pretest-posttest, which was conducted on a group of students consisting of 30 people and the test was conducted for two times. The effectiveness of BLIBW Model was tested by comparing the average pretest scores and the average posttest scores both in the first trial and the second trial. The average prestest and posttest scores in the first trial were 14.13 and 33.80. The increase in the average score was significant at alpha 0.05. Then, the average pretest and posttest scores in the second trial were 18.67 and 47.03. The result was also significant at alpha 0.05. The effectiveness of BLIBW Model in the second trial was higher than in the first test. Those result were not entirely satisfactory and it might be caused several weaknesses in both tests such as: the number of sessions were limited, there was only one subject, and the number of students who were subjected too limited. However, the researcher would like to conclude that the BLIBW Model might be implemented as a replacement alternative for the face-to-face instruction.

  2. Building energy analysis of Electrical Engineering Building from DesignBuilder tool: calibration and simulations

    Science.gov (United States)

    Cárdenas, J.; Osma, G.; Caicedo, C.; Torres, A.; Sánchez, S.; Ordóñez, G.

    2016-07-01

    This research shows the energy analysis of the Electrical Engineering Building, located on campus of the Industrial University of Santander in Bucaramanga - Colombia. This building is a green pilot for analysing energy saving strategies such as solar pipes, green roof, daylighting, and automation, among others. Energy analysis was performed by means of DesignBuilder software from virtual model of the building. Several variables were analysed such as air temperature, relative humidity, air velocity, daylighting, and energy consumption. According to two criteria, thermal load and energy consumption, critical areas were defined. The calibration and validation process of the virtual model was done obtaining error below 5% in comparison with measured values. The simulations show that the average indoor temperature in the critical areas of the building was 27°C, whilst relative humidity reached values near to 70% per year. The most critical discomfort conditions were found in the area of the greatest concentration of people, which has an average annual temperature of 30°C. Solar pipes can increase 33% daylight levels into the areas located on the upper floors of the building. In the case of the green roofs, the simulated results show that these reduces of nearly 31% of the internal heat gains through the roof, as well as a decrease in energy consumption related to air conditioning of 5% for some areas on the fourth and fifth floor. The estimated energy consumption of the building was 69 283 kWh per year.

  3. Safety leadership in the teaching laboratories of electrical and electronic engineering departments at Taiwanese Universities.

    Science.gov (United States)

    Wu, Tsung-Chih

    2008-01-01

    Safety has always been one of the principal goals in teaching laboratories. Laboratories cannot serve their educational purpose when accidents occur. The leadership of department heads has a major impact on laboratory safety, so this study discusses the factors affecting safety leadership in teaching laboratories. This study uses a mail survey to explore the perceived safety leadership in electrical and electronic engineering departments at Taiwanese universities. An exploratory factor analysis shows that there are three main components of safety leadership, as measured on a safety leadership scale: safety controlling, safety coaching, and safety caring. The descriptive statistics also reveals that among faculty, the perception of department heads' safety leadership is in general positive. A two-way MANOVA shows that there are interaction effects on safety leadership between university size and instructor age; there are also interaction effects between presence of a safety committee and faculty gender and faculty age. It is therefore necessary to assess organizational factors when determining whether individual factors are the cause of differing perceptions among faculty members. The author also presents advice on improving safety leadership for department heads at small universities and at universities without safety committees.

  4. Interaction of Psychological Factors in Shaping Entrepreneurial Intention among Computer and Electrical Engineering Students

    Directory of Open Access Journals (Sweden)

    Chao-Tung Liang

    2015-01-01

    Full Text Available Numerous technopreneurs start their ventures at college age, but the entrepreneurship of computer and electrical engineering (CEE students remains under-studied. This study analysed both the combined and interactive effects of psychological factors on the entrepreneurial intentions of CEE students. In this study, entrepreneurial intention comprised two dimensions, conviction and preparation. Regarding the direct effects, the results indicated that self-efficacy affected entrepreneurial conviction the most, followed by negative emotion, intrinsic motivation, and metacognition. Negative emotion affected entrepreneurial preparation the most, followed by self-efficacy and positive emotion. The results also revealed several crucial interactive effects resulting from psychological factors. An increase in cognitive load increased the entrepreneurial intention of students exhibiting high intrinsic motivation and reduced the intention of students exhibiting low intrinsic motivation. An increase in metacognition increased the entrepreneurial conviction of students exhibiting either high or low intrinsic motivation. An increase in positive emotion reduced the entrepreneurial intention of students exhibiting high negative emotion and increased the intention of students exhibiting low negative emotion. An increase in self-efficacy increased the entrepreneurial intention of students exhibiting either high or low negative emotion.

  5. Alternative Mental Models of Second-Year Engineering Students for Coulomb’s Law and the Electric Field

    Directory of Open Access Journals (Sweden)

    Xavier Bohigas

    2010-05-01

    Full Text Available The objective of the present study is to identify the mental models applied by students using Coulomb's law and the electric field concept to interpret electrostatic phenomena at the beginning of a second-year engineering course. Results indicate that most students do not correctly apply the symmetry of Coulomb's law. Although they have a coherent mental model, their version is not consistent with that which is scientifically accepted, and they confuse the concept of the electric field with the force between charges.

  6. Energy Optimization and Fuel Economy Investigation of a Series Hybrid Electric Vehicle Integrated with Diesel/RCCI Engines

    Directory of Open Access Journals (Sweden)

    Ali Solouk

    2016-12-01

    Full Text Available Among different types of low temperature combustion (LTC regimes, eactively controlled compression ignition (RCCI has received a lot of attention as a promising advanced combustion engine technology with high indicated thermal efficiency and low nitrogen oxides ( NO x and particulate matter (PM emissions. In this study, an RCCI engine for the purpose of fuel economy investigation is incorporated in series hybrid electric vehicle (SHEV architecture, which allows the engine to run completely in the narrow RCCI mode for common driving cycles. Three different types of energy management control (EMC strategies are designed and implemented to achieve the best fuel economy. The EMC strategies encompass rule-based control (RBC, offline, and online optimal controllers, including dynamic programing (DP and model predictive control (MPC, respectively. The simulation results show a 13.1% to 14.2% fuel economy saving by using an RCCI engine over a modern spark ignition (SI engine in SHEV for different driving cycles. This fuel economy saving is reduced to 3% in comparison with a modern compression ignition (CI engine, while NO x emissions are significantly lower. Simulation results show that the RCCI engine offers more fuel economy improvement in more aggressive driving cycles (e.g., US06, compared to less aggressive driving cycles (e.g., UDDS. In addition, the MPC results show that sub-optimal fuel economy is achieved by predicting the vehicle speed profile for a time horizon of 70 s.

  7. Il professor Mitja Skubic ottuagenario

    Directory of Open Access Journals (Sweden)

    Martina Ožbot

    2008-12-01

    Full Text Available Incredibile ma vero: il professor Mitja Skubic si trova, questa volta lui stesso, al centro dell’attenzione anziché essere il motore, il perno dell’attività. La ragione per questo attimo di respiro è il suo ottantesimo compleanno, a dire il vero passato già da tempo. È pressoché una contingenza aneddotica quella per cui il volume dedicatogli per l’occasione viene pubblicato così tardi: il professore ha continuato a tener d’occhio la nostra rivista ben dopo aver nominato i nuovi direttori tanto che sarebbe stato impossibile sorprenderlo con una miscellanea di contributi in suo onore.

  8. Professor@s e Eros Teachers and Eros

    Directory of Open Access Journals (Sweden)

    Deborah P. Britzman

    2009-01-01

    Full Text Available Professores/as são testemunhas do fantástico mundo da sexualidade. Esse artigo explora a centralidade de Eros para a educação e estabelece uma relação entre o desejo do/a professor/a e os acontecimentos emocionais da relação própria relação aluno/professor. Eu proponho que o aprendizado deva envolver nosso "eu" erótico, além das nossas fantasias. Mas esta perspectiva requer que professores/as considerem uma psicologia do amor como um caminho principal para a as situações emocionais de Eros. Na sua conclusão este trabalho sugere uma pedagogia que dê as boas vindas tanto à homossexualidade como a heterossexualidade como expressões humanas do amor.Teachers bear witness to the wondrous world of sexuality. This essay explores the centrality of Eros to education and links the teacher's desire to the emotional situation of the student/teacher relationship. I propose that learning involves our erotic selves and our fantasy life. But such a view requires that teachers consider a psychology of love as lending insight into the emotional situation of Eros. The paper concludes by suggesting a pedagogy that welcomes homosexuality and heterosexuality as human expressions of love.

  9. Integrating Solar Power onto the Electric Grid - Bridging the Gap between Atmospheric Science, Engineering and Economics

    Science.gov (United States)

    Ghonima, M. S.; Yang, H.; Zhong, X.; Ozge, B.; Sahu, D. K.; Kim, C. K.; Babacan, O.; Hanna, R.; Kurtz, B.; Mejia, F. A.; Nguyen, A.; Urquhart, B.; Chow, C. W.; Mathiesen, P.; Bosch, J.; Wang, G.

    2015-12-01

    One of the main obstacles to high penetrations of solar power is the variable nature of solar power generation. To mitigate variability, grid operators have to schedule additional reliability resources, at considerable expense, to ensure that load requirements are met by generation. Thus despite the cost of solar PV decreasing, the cost of integrating solar power will increase as penetration of solar resources onto the electric grid increases. There are three principal tools currently available to mitigate variability impacts: (i) flexible generation, (ii) storage, either virtual (demand response) or physical devices and (iii) solar forecasting. Storage devices are a powerful tool capable of ensuring smooth power output from renewable resources. However, the high cost of storage is prohibitive and markets are still being designed to leverage their full potential and mitigate their limitation (e.g. empty storage). Solar forecasting provides valuable information on the daily net load profile and upcoming ramps (increasing or decreasing solar power output) thereby providing the grid advance warning to schedule ancillary generation more accurately, or curtail solar power output. In order to develop solar forecasting as a tool that can be utilized by the grid operators we identified two focus areas: (i) develop solar forecast technology and improve solar forecast accuracy and (ii) develop forecasts that can be incorporated within existing grid planning and operation infrastructure. The first issue required atmospheric science and engineering research, while the second required detailed knowledge of energy markets, and power engineering. Motivated by this background we will emphasize area (i) in this talk and provide an overview of recent advancements in solar forecasting especially in two areas: (a) Numerical modeling tools for coastal stratocumulus to improve scheduling in the day-ahead California energy market. (b) Development of a sky imager to provide short term

  10. An Implementation of POPBL for Analog Electronics (BEL10203) Course at the Faculty Of Electrical and Electronic Engineering, Uthm

    OpenAIRE

    Masnani Mohamed; Warsuzarina Mat Jubadi; Suhaimizan Wan Zaki

    2012-01-01

    A Project Oriented Problem Based Learning (POPBL) has been introduced to the first year students in the Analog Electronics (BEL10203) course at the Faculty of Electrical and Electronic Engineering, UTHM. The aim is to design an electronic circuit using transistors and diodes that can function as electronic appliances with low cost, low power consumption, and has the features of smart and portable. The total of 143 students were divided into groups and assigned to setup an electronic based com...

  11. Testing of the Engineering Model Electrical Power Control Unit for the Fluids and Combustion Facility

    Science.gov (United States)

    Kimnach, Greg L.; Lebron, Ramon C.; Fox, David A.

    1999-01-01

    The John H. Glenn Research Center at Lewis Field (GRC) in Cleveland, OH and the Sundstrand Corporation in Rockford, IL have designed and developed an Engineering Model (EM) Electrical Power Control Unit (EPCU) for the Fluids Combustion Facility, (FCF) experiments to be flown on the International Space Station (ISS). The EPCU will be used as the power interface to the ISS power distribution system for the FCF's space experiments'test and telemetry hardware. Furthermore. it is proposed to be the common power interface for all experiments. The EPCU is a three kilowatt 12OVdc-to-28Vdc converter utilizing three independent Power Converter Units (PCUs), each rated at 1kWe (36Adc @ 28Vdc) which are paralleled and synchronized. Each converter may be fed from one of two ISS power channels. The 28Vdc loads are connected to the EPCU output via 48 solid-state and current-limiting switches, rated at 4Adc each. These switches may be paralleled to supply any given load up to the 108Adc normal operational limit of the paralleled converters. The EPCU was designed in this manner to maximize allocated-power utilization. to shed loads autonomously, to provide fault tolerance. and to provide a flexible power converter and control module to meet various ISS load demands. Tests of the EPCU in the Power Systems Facility testbed at GRC reveal that the overall converted-power efficiency, is approximately 89% with a nominal-input voltage of 12OVdc and a total load in the range of 4O% to 110% rated 28Vdc load. (The PCUs alone have an efficiency of approximately 94.5%). Furthermore, the EM unit passed all flight-qualification level (and beyond) vibration tests, passed ISS EMI (conducted, radiated. and susceptibility) requirements. successfully operated for extended periods in a thermal/vacuum chamber, was integrated with a proto-flight experiment and passed all stability and functional requirements.

  12. Stable Operation and Electricity Generating Characteristics of a Single-Cylinder Free Piston Engine Linear Generator: Simulation and Experiments

    Directory of Open Access Journals (Sweden)

    Huihua Feng

    2015-01-01

    Full Text Available We present a novel design of a single-cylinder free piston engine linear generator (FPELG incorporating a linear motor as a rebound device. A systematic simulation model of this FPELG system was built containing a kinematic and dynamic model of the piston and mover, a magneto-electric model of the linear generator, a thermodynamic model of the single-cylinder engine, and a friction model between the piston ring and cylinder liner. Simulations were performed to understand the relationships between pre-set motor parameters and the running performance of the FPELG. From the simulation results, it was found that a motor rebound force with a parabolic profile had clear advantages over a force with a triangular profile, such as a higher running frequency and peak cylinder pressure, faster piston motion, etc. The rebound position and the amplitude of rebound force were also determined by simulations. The energy conversion characteristics of the generator were obtained from our FPELG test rig. The parameters of intake pressure, motor frequency, and load resistance were varied over certain ranges, and relationships among these three parameters were obtained. The electricity-generating characteristic parameters include output power and system efficiency, which can measure the quality of matching the controllable parameters. The output power can reach 25.9 W and the system efficiency can reach 13.7%. The results in terms of matching parameters and electricity-generating characteristics should be useful to future research in adapting these engines to various operating modes.

  13. Professors of the New Economy.

    Science.gov (United States)

    Wilson, Robin

    2000-01-01

    Profiles four professors who epitomize the increasing influence of academe on new technology-driven Internet business: a start-up maven, Steven Kaplan; a social psychologist, Michael Ray; a cyberlawyer, David Post; and an e-commerce expert, Andrew B. Whinston. (DB)

  14. Electricity - Energy - Information. The history of the Faculty for Electrical Engineering and Information Technology at the RWTH Aachen; Elektrizitaet - Energie - Information. Die Geschichte der Fakultaet fuer Elektrotechnik und Informationstechnik an der RWTH Aachen

    Energy Technology Data Exchange (ETDEWEB)

    Gilson, Norbert; Kaiser, Walter

    2010-07-01

    The authors of the book under consideration report on the history of the Faculty of Electrical Engineering and Information Technology at the RWTH Aachen University (Aachen, Federal Republic of Germany). For the first time, electrical engineering was taught in 1883 was first taught as a subject of its own. The first three chapters of this book sum up the time until the Second World War. The focus of this book is on the description of the development of this faculty in the time period after the Second World War. The development of the Faculty of Electrical Engineering and Information Technology is described among the most important institutional, personal, contextual and social aspects. Due to the profound analysis of the reasons for the leading role of this faculty in a wide range of areas in the national and international scope, this book also is of great benefit for electrical engineers.

  15. Design study of a kinematic Stirling engine for dispered solar electric power systems

    Science.gov (United States)

    1980-01-01

    The concept evaluation shows that the four cylinder double acting U type Stirling engine with annular regenerators is the most suitable engine type for the 15 kW solar application with respect to design, performance and cost. Results show that near term performance for a metallic Stirling engine is 42% efficiency. Further improved components show an impact on efficiency of the future metallic engine to 45%. Increase of heater temperature, through the introduction of ceramic components, contribute the greatest amount to achieve high efficiency goals. Future ceramic Stirling engines for solar applications show an efficiency of around 50%.

  16. NOTES ON CONTRIBUTORS H. Johnson Nenty, Professor ...

    African Journals Online (AJOL)

    Admin

    NOTES ON CONTRIBUTORS. H. Johnson Nenty, Professor, Educational Research, Measurement and Evaluation, Department of Educational. Foundations, University of Botswana Idowu Biao, Professor of Lifelong learning, Department of Adult Education,. University of Botswana. Cletus K. Mbowura, Lecturer, Department of ...

  17. ICT Use by Journalism Professors in Colombia

    Science.gov (United States)

    Hung, Elias Said

    2011-01-01

    This article analyses how journalism professors at Colombian universities use information and communications technologies (ICT) in their teaching. Survey data was obtained during the first trimester of 2009 from 63 professors in journalism departments and from a total of 865 professors who are affiliated with journalism departments at 29…

  18. Erratum: Professor J. H. S. Gear

    African Journals Online (AJOL)

    s short of their. Lesley, a nd their amily a proper Wake on 15 November 1994. Erratum: Professor J. H. S. Gear. The name of Professor B. D. Schoub, Director of the. National Institute for Virology, was inadvertently omitted as the author of the obituary of Professor J. H. S. Gear published in the September 1994 SAMJ. Books.

  19. Starting the aircraft engines and gas-turbine drive by means of electric starter

    OpenAIRE

    Іщенко, І.М.; Аерокосмічний інститут НАУ; Гуз, Ю.Т.; Аерокосмічний інститут НАУ; Сіткевич, Т.А.; Аерокосмічний інститут НАУ

    2004-01-01

     Розглянуто питання електростартерного пуску авіаційних двигунів і газотурбінних приводів. Визначено основні вимоги до статичних перетворювачів для живлення електростартерів.  Рассмотрены вопросы електростартерного пуска авиационных двигателей и газотурбинных приводов. Определены основные требования к статическим преобразователям для питания електростартеров.  In the article the questions of the starting the aircraft engines and gas-turbine drive by means of electric starter is consider...

  20. Concept definition study of small Brayton cycle engines for dispersed solar electric power systems

    Science.gov (United States)

    Six, L. D.; Ashe, T. L.; Dobler, F. X.; Elkins, R. T.

    1980-01-01

    Three first-generation Brayton cycle engine types were studied for solar application: a near-term open cycle (configuration A), a near-term closed cycle (configuration B), and a longer-term open cycle (configuration C). A parametric performance analysis was carried out to select engine designs for the three configurations. The interface requirements for the Brayton cycle engine/generator and solar receivers were determined. A technology assessment was then carried out to define production costs, durability, and growth potential for the selected engine types.

  1. Cyber-physical-social systems and constructs in electric power engineering

    CERN Document Server

    Suryanarayanan, Siddharth; Roche, Robin

    2016-01-01

    Cyber-physical-social systems (CPSS) integrate computing, physical assets and human networks. Divided into four application areas to the electric grid, this book describes state-of-the-art CPSS in electric power systems, including detailed approaches on social constructs which are a critical aspect of the end-user realm.

  2. Use of hot air engine to generate electricity from biogas: a critique ...

    African Journals Online (AJOL)

    Rural electrification has high national priority because of several reasons. First, more than 90 per cent of the populations in Tanzania have no access to grid electricity and about 80% of this population lives in rural areas. Second, the poverty alleviation projects demand the incorporation of use of electricity in different ...

  3. Development of Electrically Conductive Double-Network Hydrogels via One-Step Facile Strategy for Cardiac Tissue Engineering.

    Science.gov (United States)

    Yang, Boguang; Yao, Fanglian; Hao, Tong; Fang, Wancai; Ye, Lei; Zhang, Yabin; Wang, Yan; Li, Junjie; Wang, Changyong

    2016-02-18

    Cardiac tissue engineering is an effective method to treat the myocardial infarction. However, the lack of electrical conductivity of biomaterials limits their applications. In this work, a homogeneous electronically conductive double network (HEDN) hydrogel via one-step facile strategy is developed, consisting of a rigid/hydrophobic/conductive network of chemical crosslinked poly(thiophene-3-acetic acid) (PTAA) and a flexible/hydrophilic/biocompatible network of photo-crosslinking methacrylated aminated gelatin (MAAG). Results suggest that the swelling, mechanical, and conductive properties of HEDN hydrogel can be modulated via adjusting the ratio of PTAA network to MAAG network. HEDN hydrogel has Young's moduli ranging from 22.7 to 493.1 kPa, and its conductivity (≈10(-4) S cm(-1)) falls in the range of reported conductivities for native myocardium tissue. To assess their biological activity, the brown adipose-derived stem cells (BADSCs) are seeded on the surface of HEDN hydrogel with or without electrical stimulation. Our data show that the HEDN hydrogel can support the survival and proliferation of BADSCs, and that it can improve the cardiac differentiation efficiency of BADSCs and upregulate the expression of connexin 43. Moreover, electrical stimulation can further improve this effect. Overall, it is concluded that the HEDN hydrogel may represent an ideal scaffold for cardiac tissue engineering. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  4. A Systematic Approach to Teaching Critical Thinking Skills to Electrical and Computer Engineering Undergraduates

    Science.gov (United States)

    Welch, Karla Conn; Hieb, Jeffrey; Graham, James

    2015-01-01

    Coursework that instills patterns of rigorous logical thought has long been a hallmark of the engineering curriculum. However, today's engineering students are expected to exhibit a wider range of thinking capabilities both to satisfy ABET requirements and to prepare the students to become successful practitioners. This paper presents the initial…

  5. The Implementation and Evaluation of a University-Based Outreach Laboratory Program in Electrical Engineering

    Science.gov (United States)

    Smaill, Chris R.

    2010-01-01

    In the current climate of shortages of high-quality engineering graduates, exacerbated by reduced high school enrollments in physics and mathematics, engineering faculties are becoming increasingly aware of the importance of K-12 outreach programs. Such programs can result in students being better prepared for and better informed about engineering…

  6. Everyday Electrical Engineering: A One-Week Summer Academy Course for High School Students

    Science.gov (United States)

    Mehrizi-Sani, A.

    2012-01-01

    A summer academy is held for grade 9-12 high school students at the University of Toronto, Toronto, ON, Canada, every year. The academy, dubbed the Da Vinci Engineering Enrichment Program (DEEP), is a diverse program that aims to attract domestic and international high school students to engineering and sciences (and possibly recruit them). DEEP…

  7. Interactions between the German and Anglo-American Systems in Electrical Engineering Education.

    Science.gov (United States)

    Buchner, P.

    Current trends in engineering education must accommodate the fast development of the global industrial marketplace. The well-known inertia against change in institutions of higher education will not fit for the foreseeable future. The career paths of our engineering graduates have changed and will change further, when industry moves to global…

  8. 76 FR 82103 - Airworthiness Directives; General Electric Company (GE) GE90-110B1 and GE90-115B Turbofan Engines

    Science.gov (United States)

    2011-12-30

    ...-10-AD; Amendment 39-16901; AD 2011-26-11] RIN 2120-AA64 Airworthiness Directives; General Electric Company (GE) GE90- 110B1 and GE90-115B Turbofan Engines AGENCY: Federal Aviation Administration (FAA), DOT... failure of the seal of the HPC stages 2-5 spool, uncontained engine failure, and damage to the airplane...

  9. Three dimensional graphene scaffold for cardiac tissue engineering and in-situ electrical recording.

    Science.gov (United States)

    Ameri, S K; Singh, P K; D'Angelo, R; Stoppel, W; Black, L; Sonkusale, S R

    2016-08-01

    In this paper, we present a three-dimensional graphene foam made of few layers of CVD grown graphene as a scaffold for growing cardiac cells and recording their electrical activity. Our results show that graphene foam not only provides an excellent extra-cellular matrix (ECM) for the culture of such electrogenic cells but also enables recording of its extracellular electrical activity in-situ. Recording is possible due to graphene's excellent conductivity. In this paper, we present our results on the fabrication of the graphene scaffold and initial studies on the culture of cardiac cell lines such as HL-1 and recording of their real-time electrical activity.

  10. Engineering IT-enabled sustainable electricity services the tale of two low-cost green Azores Islands

    CERN Document Server

    Xie, Le; Liu, Qixing

    2013-01-01

    Engineering IT-Enabled Electricity Services: The Tale of Two Low-Cost Green Azores Islands covers sustainable energy services to customers - a balanced choice and coordination of energy generated by traditional and alternative sources. The “Green Islands” project represents a decade of work by over a dozen researchers who have developed a model designed to utilize the potential of distributed clean resources. The key is the proper use of Information Technology (IT).  Sited on two islands in the Azores, the project developed the model of careful forecasting of demand and supply, down to the minute, coordinating the output of conventional power plants, wind energy, fly wheels, hydroelectricity, demand reduction, and even plug-in electric vehicles to take full advantage of the clean resources available. This contributed volume presents methods for predicting variable resources, such as wind power generation, and analyzes the achievable accuracy of these predictions. Throughout this book, contributors sho...

  11. New, efficient and viable system for ethanol fuel utilization on combined electric/internal combustion engine vehicles

    Science.gov (United States)

    Sato, André G.; Silva, Gabriel C. D.; Paganin, Valdecir A.; Biancolli, Ana L. G.; Ticianelli, Edson A.

    2015-10-01

    Although ethanol can be directly employed as fuel on polymer-electrolyte fuel cells (PEMFC), its low oxidation kinetics in the anode and the crossover to the cathode lead to a substantial reduction of energy conversion efficiency. However, when fuel cell driven vehicles are considered, the system may include an on board steam reformer for converting ethanol into hydrogen, but the hydrogen produced contains carbon monoxide, which limits applications in PEMFCs. Here, we present a system consisting of an ethanol dehydrogenation catalytic reactor for producing hydrogen, which is supplied to a PEMFC to generate electricity for electric motors. A liquid by-product effluent from the reactor can be used as fuel for an integrated internal combustion engine, or catalytically recycled to extract more hydrogen molecules. Power densities comparable to those of a PEMFC operating with pure hydrogen are attained by using the hydrogen rich stream produced by the ethanol dehydrogenation reactor.

  12. Electrical engineering design using characterized elements; Conception en genie electrique a l'aide d'elements caracterises

    Energy Technology Data Exchange (ETDEWEB)

    Demni, H.E.

    2004-10-15

    This work treats systematic design of energy transformation structures used in Electrical Engineering. We propose an approach dedicated to design by association of characterized elements. Starting from a set of specifications, the designer has to define a coherent structure by assembling predefined elements. Within this framework, we adopt a characterization approach that takes into account various criteria necessary for design. Then, this approach allowed us to develop methodologies for designing electric energy transformation structures. These methodologies were used to implement a software application based on three tools: a data base as an elements library, a graphic tool allowing the construction of energy transformation structures, an expert module which helps the designer in his work. (author)

  13. Unraveling the mechanistic effects of electric field stimulation towards directing stem cell fate and function: A tissue engineering perspective.

    Science.gov (United States)

    Thrivikraman, Greeshma; Boda, Sunil Kumar; Basu, Bikramjit

    2018-01-01

    Electric field (EF) stimulation can play a vital role in eliciting appropriate stem cell response. Such an approach is recently being established to guide stem cell differentiation through osteogenesis/neurogenesis/cardiomyogenesis. Despite significant recent efforts, the biophysical mechanisms by which stem cells sense, interpret and transform electrical cues into biochemical and biological signals still remain unclear. The present review critically analyses the variety of EF stimulation approaches that can be employed to evoke appropriate stem cell response and also makes an attempt to summarize the underlying concepts of this notion, placing special emphasis on stem cell based tissue engineering and regenerative medicine. This review also discusses the major signaling pathways and cellular responses that are elicited by electric stimulation, including the participation of reactive oxygen species and heat shock proteins, modulation of intracellular calcium ion concentration, ATP production and numerous other events involving the clustering or reassembling of cell surface receptors, cytoskeletal remodeling and so on. The specific advantages of using external electric stimulation in different modalities to regulate stem cell fate processes are highlighted with explicit examples, in vitro and in vivo. Copyright © 2017 Elsevier Ltd. All rights reserved.

  14. Dynamic model of Stirling engine crank mechanism with connected electric generator

    Directory of Open Access Journals (Sweden)

    Vlach R.

    2009-06-01

    Full Text Available This paper treats of a numerical dynamic model of Stirling engine crank mechanism. The model is included in the complex model of combined heat and power unit. The unit is composed of the Stirling engine and of attached three-phase synchronous generator. This generator should start the Stirling engine in motor mode as well. It is necessary to combine the crank shaft dynamic model and the complete thermal model of Stirling engine for simulations and analyses of engine run. Our aim is to create a dynamics model which takes into account the parameters of crankshaft, piston rods, pistons, and attached generator. For unit working, the electro-mechanical behaviour of generator is also important. That is why we experimentally verified the parameters of generator. The measured characteristics are used in a complex model of heat and power unit. Moreover, it is also possible to determine the Stirling engine torque by the help of these electro-mechanical characteristics. These values can be used e. g. for determination of optimal engine working point or for unit control.

  15. Electrical engineering unit for the reactive power control of the load bus at the voltage instability

    Science.gov (United States)

    Kotenev, A. V.; Kotenev, V. I.; Kochetkov, V. V.; Elkin, D. A.

    2018-01-01

    For the purpose of reactive power control error reduction and decrease of the voltage sags in the electric power system caused by the asynchronous motors started the mathematical model of the load bus was developed. The model was built up of the sub-models of the following elements: a transformer, a transmission line, a synchronous and an asynchronous loads and a capacitor bank load, and represents the automatic reactive power control system taking into account electromagnetic processes of the asynchronous motors started and reactive power changing of the electric power system elements caused by the voltage fluctuation. The active power/time and reactive power/time characteristics based on the recommended procedure of the equivalent electric circuit parameters calculation were obtained. The derived automatic reactive power control system was shown to eliminate the voltage sags in the electric power system caused by the asynchronous motors started.

  16. Instrumentation Requirements for the Engineering Evaluation of Nuclear-Electric Spacecraft

    Science.gov (United States)

    Apel, W. C.

    1961-01-01

    Spacecraft employing nuclear-electric propulsion are being proposed for missions to Venus and distances beyond. These spacecraft utilize a nuclear reactor to provide thermal energy to a turboalternator which generates electric power for an ion motor and the other spacecraft systems. This Report discusses the instrumentation and communications system needed to evaluate a nuclear-electric spacecraft in flight, along with the problems expected. A representative spacecraft design is presented, which leads to a discussion of the instrumentation needed to evaluate such a spacecraft. A basic communications system is considered for transmitting the spacecraft data to Earth. The instrumentation and communications system, as well as all electronic systems on a nuclear-electric spacecraft, will be operating in high temperature and nuclear-radiation environments. The problems caused by these environments are discussed, and possible solutions are offered.

  17. An Agent-Based Optimization Framework for Engineered Complex Adaptive Systems with Application to Demand Response in Electricity Markets

    Science.gov (United States)

    Haghnevis, Moeed

    The main objective of this research is to develop an integrated method to study emergent behavior and consequences of evolution and adaptation in engineered complex adaptive systems (ECASs). A multi-layer conceptual framework and modeling approach including behavioral and structural aspects is provided to describe the structure of a class of engineered complex systems and predict their future adaptive patterns. The approach allows the examination of complexity in the structure and the behavior of components as a result of their connections and in relation to their environment. This research describes and uses the major differences of natural complex adaptive systems (CASs) with artificial/engineered CASs to build a framework and platform for ECAS. While this framework focuses on the critical factors of an engineered system, it also enables one to synthetically employ engineering and mathematical models to analyze and measure complexity in such systems. In this way concepts of complex systems science are adapted to management science and system of systems engineering. In particular an integrated consumer-based optimization and agent-based modeling (ABM) platform is presented that enables managers to predict and partially control patterns of behaviors in ECASs. Demonstrated on the U.S. electricity markets, ABM is integrated with normative and subjective decision behavior recommended by the U.S. Department of Energy (DOE) and Federal Energy Regulatory Commission (FERC). The approach integrates social networks, social science, complexity theory, and diffusion theory. Furthermore, it has unique and significant contribution in exploring and representing concrete managerial insights for ECASs and offering new optimized actions and modeling paradigms in agent-based simulation.

  18. Introduction to applied statistical signal analysis guide to biomedical and electrical engineering applications

    CERN Document Server

    Shiavi, Richard

    2007-01-01

    Introduction to Applied Statistical Signal Analysis is designed for the experienced individual with a basic background in mathematics, science, and computer. With this predisposed knowledge, the reader will coast through the practical introduction and move on to signal analysis techniques, commonly used in a broad range of engineering areas such as biomedical engineering, communications, geophysics, and speech.Introduction to Applied Statistical Signal Analysis intertwines theory and implementation with practical examples and exercises. Topics presented in detail include: mathematical

  19. Engineering science and mechanics department head named

    OpenAIRE

    Nystrom, Lynn A.

    2004-01-01

    Ishwar K. Puri, professor of mechanical engineering and executive associate dean of engineering at the University of Illinois at Chicago, will become the head of Virginia Tech•À_ó»s Department of Engineering Science and Mechanics Aug. 1.

  20. Head of Department of Mechanical Engineering appointed

    OpenAIRE

    Nystrom, Lynn A.

    2004-01-01

    Kenneth S. Ball, professor of mechanical engineering at the University of Texas at Austin, will become the head of the Department of Mechanical Engineering in Virginia Tech's College of Engineering Aug. 1.

  1. Application of electrical stimulation for functional tissue engineering in vitro and in vivo

    Science.gov (United States)

    Radisic, Milica (Inventor); Park, Hyoungshin (Inventor); Langer, Robert (Inventor); Freed, Lisa (Inventor); Vunjak-Novakovic, Gordana (Inventor)

    2013-01-01

    The present invention provides new methods for the in vitro preparation of bioartificial tissue equivalents and their enhanced integration after implantation in vivo. These methods include submitting a tissue construct to a biomimetic electrical stimulation during cultivation in vitro to improve its structural and functional properties, and/or in vivo, after implantation of the construct, to enhance its integration with host tissue and increase cell survival and functionality. The inventive methods are particularly useful for the production of bioartificial equivalents and/or the repair and replacement of native tissues that contain electrically excitable cells and are subject to electrical stimulation in vivo, such as, for example, cardiac muscle tissue, striated skeletal muscle tissue, smooth muscle tissue, bone, vasculature, and nerve tissue.

  2. Interview with Professor Mark Wilcox.

    Science.gov (United States)

    Wilcox, Mark

    2016-08-01

    Mark Wilcox speaks to Georgia Patey, Commissioning Editor: Professor Mark Wilcox is a Consultant Microbiologist and Head of Microbiology at the Leeds Teaching Hospitals (Leeds, UK), the Professor of Medical Microbiology at the University of Leeds (Leeds, UK), and is the Lead on Clostridium difficile and the Head of the UK C. difficile Reference Laboratory for Public Health England (PHE). He was the Director of Infection Prevention (4 years), Infection Control Doctor (8 years) and Clinical Director of Pathology (6 years) at the Leeds Teaching Hospitals. He is Chair of PHE's Rapid Review Panel (reviews utility of infection prevention and control products for National Health Service), Deputy Chair of the UK Department of Health's Antimicrobial Resistance and Healthcare Associated Infection Committee and a member of PHE's HCAI/AR Programme Board. He is a member of UK/European/US working groups on C. difficile infection. He has provided clinical advice as part of the FDA/EMA submissions for the approval of multiple novel antimicrobial agents. He heads a healthcare-associated infection research team at University of Leeds, comprising approximately 30 doctors, scientists and nurses; projects include multiple aspects of C. difficile infection, diagnostics, antimicrobial resistance and the clinical development of new antimicrobial agents. He has authored more than 400 publications, and is the coeditor of Antimicrobial Chemotherapy (5th/6th/7th Editions, 15 December 2007).

  3. Engineering Skeletal Muscle Tissues from Murine Myoblast Progenitor Cells and Application of Electrical Stimulation

    OpenAIRE

    van der Schaft, Daisy W. J.; van Spreeuwel, Ariane C. C.; Kristel J. M. Boonen; Langelaan, Marloes L. P.; Bouten, Carlijn V. C.; Baaijens, Frank P.T.

    2013-01-01

    Engineered muscle tissues can be used for several different purposes, which include the production of tissues for use as a disease model in vitro, e.g. to study pressure ulcers, for regenerative medicine and as a meat alternative 1. The first reported 3D muscle constructs have been made many years ago and pioneers in the field are Vandenburgh and colleagues 2,3. Advances made in muscle tissue engineering are not only the result from the vast gain in knowledge of biochemical factors, stem cell...

  4. Tailoring the thermal and electrical transport properties of graphene films by grain size engineering

    Science.gov (United States)

    Ma, Teng; Liu, Zhibo; Wen, Jinxiu; Gao, Yang; Ren, Xibiao; Chen, Huanjun; Jin, Chuanhong; Ma, Xiu-Liang; Xu, Ningsheng; Cheng, Hui-Ming; Ren, Wencai

    2017-02-01

    Understanding the influence of grain boundaries (GBs) on the electrical and thermal transport properties of graphene films is essentially important for electronic, optoelectronic and thermoelectric applications. Here we report a segregation-adsorption chemical vapour deposition method to grow well-stitched high-quality monolayer graphene films with a tunable uniform grain size from ~200 nm to ~1 μm, by using a Pt substrate with medium carbon solubility, which enables the determination of the scaling laws of thermal and electrical conductivities as a function of grain size. We found that the thermal conductivity of graphene films dramatically decreases with decreasing grain size by a small thermal boundary conductance of ~3.8 × 109 W m-2 K-1, while the electrical conductivity slowly decreases with an extraordinarily small GB transport gap of ~0.01 eV and resistivity of ~0.3 kΩ μm. Moreover, the changes in both the thermal and electrical conductivities with grain size change are greater than those of typical semiconducting thermoelectric materials.

  5. Opto-electrical surface engineering of wafer based c-Si solar cells

    NARCIS (Netherlands)

    Ingenito, A.

    2016-01-01

    Climate changes due to increase of CO2 emission are becoming a serious issue for this planet. The so called climate crisis has been the main topic of the last United Nations Climate Change Conference (COP 21) . Direct conversion of sunlight into electricity is one of the most promising technology

  6. Development of technical skills in Electrical Power Engineering students: A case study of Power Electronics as a Key Course

    Science.gov (United States)

    Hussain, I. S.; Azlee Hamid, Fazrena

    2017-08-01

    Technical skills are one of the attributes, an engineering student must attain by the time of graduation, as per recommended by Engineering Accreditation Council (EAC). This paper describes the development of technical skills, Programme Outcome (PO) number 5, in students taking the Bachelor of Electrical Power Engineering (BEPE) programme in Universiti Tenaga Nasional (UNITEN). Seven courses are identified to address the technical skills development. The course outcomes (CO) of the courses are designed to instill the relevant technical skills with suitable laboratory activities. Formative and summative assessments are carried out to gauge students’ acquisition of the skills. Finally, to measure the attainment of the technical skills, key course concept is used. The concept has been implemented since 2013, focusing on improvement of the programme instead of the cohort. From the PO attainment analysis method, three different levels of PO attainment can be calculated: from the programme level, down to the course and student levels. In this paper, the attainment of the courses mapped to PO5 is measured. It is shown that Power Electronics course, which is the key course for PO5, has a strong attainment at above 90%. PO5 of other six courses are also achieved. As a conclusion, by embracing outcome-based education (OBE), the BEPE programme has a sound method to develop technical psychomotor skills in the degree students.

  7. A Model for the Development of a CDIO Based Curriculum in Electrical Engineering

    DEFF Research Database (Denmark)

    Bruun, Erik; Kjærgaard, Claus

    2011-01-01

    environment, the university environment, and the teachers and students. Each of them and their influence on the curriculum is described and the sources of information about the influencers are discussed. The CDIO syllabus has been defined as part of the basis for the Bachelor of Engineering programs...

  8. Motivational Project-Based Laboratory for a Common First Year Electrical Engineering Course

    Science.gov (United States)

    Nedic, Zorica; Nafalski, Andrew; Machotka, Jan

    2010-01-01

    Over the past few years many universities worldwide have introduced a common first year for all engineering disciplines. This is despite the opinion of many academics that large classes have negative effects on the learning outcomes of first year students. The University of South Australia is also faced with low motivation amongst engineering…

  9. Second Language Socialization through Team Interaction among Electrical and Computer Engineering Students

    Science.gov (United States)

    Vickers, Caroline H.

    2007-01-01

    This article, based on a longitudinal, ethnographic study among engineering students, examines the interactional processes surrounding second language (L2) socialization. L2 socialization perspectives argue that the cognitive and the social are interconnected, and that learning an L2 is a process of coming to understand socially constructed…

  10. The active learning educational organisation: a case study of innovation in electrical engineering education

    NARCIS (Netherlands)

    Vos, Henk

    2004-01-01

    The introduction of active learning in engineering education is often started by enthusiastic teachers or change agents. They usually encounter resistance from stakeholders such as colleagues, department boards or students. For a successful introduction these stakeholders all have to learn what

  11. Design of Electric Racing Vehicles: An experience of interdisciplinary project-based education in engineering

    OpenAIRE

    Fernández-Ramos, José; Fernández-Lozano, Juan Jesús; Gago-Calderón, Alfonso

    2013-01-01

    This paper describes a project based learning program carried out in the E.T.S.I.I. of the University of Malaga, Spain, whose main objective is the organization of a team for the development of experimental electric racing vehicles and their evaluation in competitive races. It is shown the work done during the first two years of the project, highlighting the most important aspects of the experience: the training focused on senior students (capstone courses), the training focused on freshmen (...

  12. Professor Gender, Age, and "Hotness" in Influencing College Students' Generation and Interpretation of Professor Ratings

    Science.gov (United States)

    Sohr-Preston, Sara L.; Boswell, Stefanie S.; McCaleb, Kayla; Robertson, Deanna

    2016-01-01

    A sample of 230 undergraduate psychology students rated their expectations of a bogus professor (who was randomly designated a man or woman and "hot" versus "not hot") based on ratings and comments found on RateMyProfessors.com. Five professor qualities were derived using principal components analysis: dedication,…

  13. Performance Improvement of a Portable Electric Generator Using an Optimized Bio-Fuel Ratio in a Single Cylinder Two-Stroke Engine

    Directory of Open Access Journals (Sweden)

    Yamada Hiroaki

    2011-11-01

    Full Text Available The performance of an electrical generator using bio-fuel and gasoline blends of different composition as fuel in a single cylinder engine is presented. The effect of an optimized blend ratio of bio-fuel with gasoline on engine performance improvement and thereby on the electrical generator output is studied. Bio-fuels such as ethanol, butanol and methanol are blended with gasoline in different proportions and evaluated for performance. The effects of different bio-fuel/gasoline blending ratios are compared experimentally with that of the gasoline alone using the output power developed by the electric generator as the evaluation parameter. With a composition of 10% ethanol–gasoline, the engine performance is increased up to 6% and with a blending ratio of 20% butanol–gasoline the performance is increased up to 8% compared to the use of 100% gasoline. The investigations are performed on a portable generator used in palm tree harvesting applications.

  14. Electrically responsive microreservoires for controllable delivery of dexamethasone in bone tissue engineering

    Energy Technology Data Exchange (ETDEWEB)

    Paun, Irina Alexandra, E-mail: irina.paun@physics.pub.ro [Faculty of Applied Sciences, University Politehnica of Bucharest, RO-060042 (Romania); National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest RO-077125 (Romania); Zamfirescu, Marian [National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest RO-077125 (Romania); Luculescu, Catalin Romeo, E-mail: catalin.luculescu@inflpr.ro [National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest RO-077125 (Romania); Acasandrei, Adriana Maria; Mustaciosu, Cosmin Catalin [Horia Hulubei National Institute for Physics and Nuclear Engineering IFIN-HH, Magurele, Bucharest RO-077125 (Romania); Mihailescu, Mona [Faculty of Applied Sciences, University Politehnica of Bucharest, RO-060042 (Romania); Dinescu, Maria, E-mail: dinescum@nipne.ro [National Institute for Laser, Plasma and Radiation Physics, Magurele, Bucharest RO-077125 (Romania)

    2017-01-15

    Highlights: • Electrically-responsive microreservoires (ERRs) for controlled release of Dex. • ERRs made of microtubes produced by two photon polymerization of IP-L780 photoresist. • Microtubes loaded with PPy/Dex mixture and sealed with a thin PLGA layer. • Kinetics of Dex release controlled by electrical stimulation of the ERRs. • Controlled Dex release accelerates the cells osteogenic differentiation. - Abstract: A major concern in orthopedic implants is to decrease the chronic inflammation using specific drug therapies. The newest strategies rely on the controlled delivery of antiinflammatory drugs from carrier biointerfaces designed in the shape of 3D architectures. We report on electrically responsive microreservoires (ERRs) acting as microcontainers for antiinflammatory drugs, as potential biointerfaces in orthopedic implants. The ERRs consist in arrays of vertical microtubes produced by laser direct writing using two photon polymerization effects (2PP-LDW) of a commercially available photoresist, IP-L780. A polypyrrole (conductive)/dexamethasone (drug model) (PPy/Dex) mixture was loaded into the ERRs via a simple immersion process. Then, the ERRs were sealed with a poly(lactic-co-glycolic acid)(PLGA) layer by Matrix Assisted Pulsed Laser Evaporation. ERRs stimulation using voltage cycles between −1 V and +1 V, applied at specific time intervals, at a scan rate of 0.1 V s{sup −1}, enabled to control the Dex release. The release time scales were between 150 and 275 h, while the concentrations of Dex released were between 450–460 nM after three applied voltage cycles, for different microreservoires dimensions. The proposed approach was validated in osteoblast-like MG-63 cell cultures. Cell viability and adhesion assays showed that the Dex-loaded ERRs sustained the cells growth and preserved their characteristic polygonal shape. Importantly, for the electrically-stimulated Dex release, the level of the alkaline phosphatase activity increased

  15. 'Supermentoring' of assistant professors' teaching

    DEFF Research Database (Denmark)

    Lauridsen, Ole

    Aarhus University offers a mandatory pedagogical training program for assistant professors, required in order to obtain tenure at a Danish university. At Business and Social Sciences, this program is supplemented by voluntary observation and (first of all formative) supervision of the assistant...... professors’ teaching practice. This offer is given is (i) because many young university teachers face problems putting pedagogical theory into practice – even though the program mentioned is practice-oriented, and (ii) because many of them (partly due to (i)) lack self-confidence as to teaching....... The presentation will discuss the theoretical framework of the supervision given and compare it to other supervision models. Furthermore it will address the need of working with supervision in a SOTL context. Attendees will be activated through discussion of short prototypical cases. A possible – and desired...

  16. Observations on Professor Hayek's Plan

    Directory of Open Access Journals (Sweden)

    Ludwig von Mises

    2009-01-01

    Full Text Available This memorandum was written at the request of Henry Hazlitt to provide Mises’s comments on and concerns about F.A. Hayek’s initial proposals for what became the Mont Pèlerin Society. Mises stresses that those who favor liberty and freedom and oppose totalitarianism must also oppose interventionism. The memo argues that those who fought and lost against the rising tide of totalitarianism at the turn of the 20th Century lost their battles because they settled for middle-of-the-road policies that conceded considerable ground to the socialists. The weak point in Professor Hayek’s plan is that it relies upon the cooperation of many men who are today’s middle-of-the-roaders. As interventionists, they may not be the hoped-for intellectual pioneers to inspire people to build a freer world.

  17. Professor Camillo Negro's Neuropathological Films.

    Science.gov (United States)

    Chiò, Adriano; Gianetto, Claudia; Dagna, Stella

    2016-01-01

    Camillo Negro, Professor in Neurology at the University of Torino, was a pioneer of scientific film. From 1906 to 1908, with the help of his assistant Giuseppe Roasenda and in collaboration with Roberto Omegna, one of the most experienced cinematographers in Italy, he filmed some of his patients for scientific and educational purposes. During the war years, he continued his scientific film project at the Military Hospital in Torino, filming shell-shocked soldiers. In autumn 2011, the Museo Nazionale del Cinema, in partnership with the Faculty of Neurosciences of the University of Torino, presented a new critical edition of the neuropathological films directed by Negro. The Museum's collection also includes 16 mm footage probably filmed in 1930 by Doctor Fedele Negro, Camillo's son. One of these films is devoted to celebrating the effects of the so-called "Bulgarian cure" on Parkinson's disease.

  18. Basic Principles of Industrial Electric Power Network Computer Aided Design and Engineering

    Directory of Open Access Journals (Sweden)

    M. I. Fursanov

    2012-01-01

    Full Text Available A conceptual model for a computer aided design and engineering system has been developed in the paper. The paper presents basic automation process principles including a graphical representation   network and calculation results, convenient user interface, automatic mode calculation, selection of transformer rated power and cross-section area of wires. The developed algorithm and program make it possible to save time and improve quality of project implementation.

  19. Some aspects of applying nanostructured materials in air filtration, water filtration and electrical engineering

    Science.gov (United States)

    Kimmer, Dusan; Vincent, Ivo; Lovecka, Lenka; Kazda, Tomas; Giurg, Adam; Skorvan, Ondrej

    2017-05-01

    Nanostructures prepared from nanofibres and nanostructured composites prepared from nanofibres and fillers are gradually becoming increasingly demanded materials for applications in various industrial branches connected with catalysis, environment protection (air filtration, waste water treatment, sound absorption), in biological engineering, electronics (battery separators, electrode materials), etc. Selected applications of these materials prepared in the company SPUR a.s. are summed up in the following presentation.

  20. Application of ORC power station to increase electric power of gas compression ignition engine

    Directory of Open Access Journals (Sweden)

    Mocarski Szymon

    2017-01-01

    Full Text Available The paper presents the calculation results of efficiency of the subcritical low temperature ORC power station powered by waste heat resulting from the process of cooling a stationary compression ignition engine. The source of heat to supply the ORC power station is the heat in a form of water jet cooling the engine at a temperature of 92°C, and the exhaust gas stream at a temperature of 420°C. The study considers three variants of systems with the ORC power stations with different ways of using heat source. The first variant assumes using just engine cooling water to power the ORC station. In the second variant the ORC system is powered solely by a heat flux from the combustion gases by means of an intermediary medium - thermal oil, while the third variant provides the simultaneous management of both heat fluxes to heat the water stream as a source of power supply to the ORC station. The calculations were made for the eight working media belonging both to groups of so-called dry media (R218, R1234yf, R227ea and wet media (R32, R161, R152a, R134a, R22.

  1. B 150 civil engineering futures

    DEFF Research Database (Denmark)

    a huge investment in new production equipment and working processes for the craftsmen who use them. Completely new thinking is needed when an electrical impulse is used to improve the penetration of a chemical. The same applies when classical materials like concrete are given new properties or when...... a previously passive insulation material is altered to play an active role in a building. The Design Master Class was for architects, civil engineers and students. It was led by Richard Horden, who is not only the head of a design department at Munich Technical University, but also works on design in his own...... to develop a technically advanced form of aesthetics. The Master Class in low energy buildings was led by civil engineer, Svend Svendsen, a Professor at DTU Byg. Together with colleagues and students, he has achieved an extensive knowledge of Integrated Design. In fact, the situation is that our knowledge...

  2. How College Students View a Professor's Role

    Science.gov (United States)

    Gadzella, Bernadette M.

    1977-01-01

    Views of 3,670 students from six colleges and universities on most and least important traits of an ideal professor were analyzed. All data were collected with the same instrument. Data revealed students selected similar MOST and LEAST important traits of a quality professor. (Author)

  3. Finnish Students' Perceptions of a Visiting Professor.

    Science.gov (United States)

    Haussler, Susan C.; Paavilainen, Eija; Astedt-Kurki, Paivi

    2003-01-01

    Finnish nursing students (n=31) evaluated their experience with a visiting Fulbright professor. Students were satisfied with course content, teaching methods, and information about the U.S. health care system. They thought the professor should have been more knowledgeable about Finnish culture, education, and health care. (Contains 15 references.)…

  4. Professor Delight: Cultivating Organizational Citizenship Behavior

    Science.gov (United States)

    Mazen, Abdelmagid; Herman, Susan; Ornstein, Suzyn

    2008-01-01

    This article describes the rationale for and use of a class innovation the authors call "professor delight." This inexpensive, high-yield concept allows students and professors to enact their understanding of citizenship throughout the term, and often beyond. The authors explain the concept, describe its implementation in class, and link it to the…

  5. Electrically responsive microreservoires for controllable delivery of dexamethasone in bone tissue engineering

    Science.gov (United States)

    Paun, Irina Alexandra; Zamfirescu, Marian; Luculescu, Catalin Romeo; Acasandrei, Adriana Maria; Mustaciosu, Cosmin Catalin; Mihailescu, Mona; Dinescu, Maria

    2017-01-01

    A major concern in orthopedic implants is to decrease the chronic inflammation using specific drug therapies. The newest strategies rely on the controlled delivery of antiinflammatory drugs from carrier biointerfaces designed in the shape of 3D architectures. We report on electrically responsive microreservoires (ERRs) acting as microcontainers for antiinflammatory drugs, as potential biointerfaces in orthopedic implants. The ERRs consist in arrays of vertical microtubes produced by laser direct writing using two photon polymerization effects (2PP_LDW) of a commercially available photoresist, IP-L780. A polypyrrole (conductive)/dexamethasone (drug model) (PPy/Dex) mixture was loaded into the ERRs via a simple immersion process. Then, the ERRs were sealed with a poly(lactic-co-glycolic acid)(PLGA) layer by Matrix Assisted Pulsed Laser Evaporation. ERRs stimulation using voltage cycles between -1 V and +1 V, applied at specific time intervals, at a scan rate of 0.1 V s-1, enabled to control the Dex release. The release time scales were between 150 and 275 h, while the concentrations of Dex released were between 450-460 nM after three applied voltage cycles, for different microreservoires dimensions. The proposed approach was validated in osteoblast-like MG-63 cell cultures. Cell viability and adhesion assays showed that the Dex-loaded ERRs sustained the cells growth and preserved their characteristic polygonal shape. Importantly, for the electrically-stimulated Dex release, the level of the alkaline phosphatase activity increased twice, the osteogenic differentiation surpassed by 1.6 times and the relative level of osteocalcin gene expression was 2.2 times higher as compared with the unstimulated drug release. Overall, the ERRs were able to accelerate the cells osteogenic differentiation via electrically controlled release of Dex.

  6. Application of Electrical Resistivity Imaging for Engineering Site Investigation. A Case Study on Prospective Hospital Site, Varamin, Iran

    Science.gov (United States)

    Amini, Amin; Ramazi, Hamidreza

    2016-12-01

    The article addresses the application of electrical resistivity imaging for engineering site investigation in Pishva Hospital, Varamin, Iran. Some aqueduct shafts exist in the study area backfilled by loose materials. The goals of this study are to detect probable aqueduct tunnels and their depth, investigate filling quality in the shafts as well as connection(s) between them. Therefore, three profiles were surveyed by dipoledipole electrode array. Also, to investigate the potentially anomalous areas more accurately, five additional resistivity profiles were measured by a Combined Resistivity Sounding-Profiling array (CRSP). According to the results of 2-D inversion modelling, a main aqueduct tunnel was detected beneath the central part of the site. Finally, the resistivity pattern of the detected aqueduct system passing the investigated area was provided using the obtained results.

  7. Study on a New Type of Electric-controlled Engine Fuel Consumption Meter Based on Volume Method

    Directory of Open Access Journals (Sweden)

    Qing-Yong Zhang

    2014-04-01

    Full Text Available At present study on the testing methods and instruments for vehicles’ fuel consumption is still not perfect. It still can’t provide a rapid and accurate measuring method and instrument. A new type of fuel consumption meter structure is developed which used two small containers to relay to supply the engine and realizes oil consumption measuring by detecting the real- time liquid level in the containers. Photoelectric sensors and a chip microcomputer are used to realize transient detection. Its structure and principle are analyzed. The system of its hardware and software of the electric-controlling system are designed. Some key components are selected and the process of exhausting, starting and measuring are designed. Precision test of the system is performed, and the result shows the accuracy of the meter in the range of 800 ml is 0.1 %, which meets the requirements and the feasibility of the structure is verified. Finally the main influencing factors are analyzed.

  8. Dictionary electrical engineering. German-English, English-German. 3. ed.; Woerterbuch Elektrotechnik. Deutsch-Englisch, Englisch-Deutsch

    Energy Technology Data Exchange (ETDEWEB)

    Petersen, Hans-Joachim

    2017-06-01

    This dictionary facilitates correct handling of technical terms in electrical engineering. The essential enlargement of vocabulary in this edition offers a well-founded basis of the electrotechnical terms for education as well as for everyday use. An appendix with frequently used phrases complements this dictionary together with the ''International System of Units''. [German] Dieses Woerterbuch erleichtert den fachlich korrekten Umgang mit Fachausdruecken der Elektrotechnik. Die wesentliche Erweiterung des Wortschatzes in dieser Auflage bietet eine fundierte Basis der elektrotechnischen Begriffe sowohl fuer die Ausbildung, als auch die alltaegliche Anwendung. Ein Anhang mit haeufig benutzten Redewendungen ergaenzt zusammen mit dem ''International System of Units'' dieses Woerterbuch.

  9. The outlook for application of powerful nuclear thermionic reactor - powered space electric jet propulsion engines

    Energy Technology Data Exchange (ETDEWEB)

    Semyonov, Y.P.; Bakanov, Y.A.; Synyavsky, V.V.; Yuditsky, V.D. [Rocket-Space Corp. `Energia`, Moscow (Russian Federation)

    1997-12-31

    This paper summarizes main study results for application of powerful space electric jet propulsion unit (EJPUs) which is powered by Nuclear Thermionic Power Unit (NTPU). They are combined in Nuclear Power/Propulsion Unit (NPPU) which serves as means of spacecraft equipment power supply and spacecraft movement. Problems the paper deals with are the following: information satellites delivery and their on-orbit power supply during 10-15 years, removal of especially hazardous nuclear wastes, mining of asteroid resources and others. Evaluations on power/time/mass relationship for this type of mission are given. EJPU parameters are compatible with Russian existent or being under development launch vehicle. (author)

  10. The QED engine spectrum - Fusion-electric propulsion for air-breathing to interstellar flight

    Science.gov (United States)

    Bussard, Robert W.; Jameson, Lorin W.

    1993-01-01

    A new inertial-electrostatic-fusion direct electric power source can be used to drive a relativistic e-beam to heat propellant. The resulting system is shown to yield specific impulse and thrust/mass ratio 2-3 orders of magnitude larger than from other advanced propulsion concepts. This QED system can be applied to aerospace vehicles from air-breathing to near-interstellar flight. Examples are given for Earth/Mars flight missions, that show transit times of 40 d with 20 percent payload in single-stage vehicles.

  11. Conversion of Low Quality Waste Heat to Electric Power with Small-Scale Organic Rankine Cycle (ORC) Engine/Generator Technology

    Science.gov (United States)

    2016-08-01

    Small-Scale W912H0-12-C-0059 Organic Rankine Cycle (ORC) Engine /Generator Technology 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR( SI 5d...same fuel input. This value is used for calculation of Greenhouse Gas (GHG) reductions and economic results. Life cycle economics of the system are...associated with engine and other electric generator systems , waste heat from steam or heat distribution, waste heat from boiler exhausts, and heat

  12. Materials Comparison of Cutting Tools Functional Parts for Cutting of Electrical Engineering Sheets

    Directory of Open Access Journals (Sweden)

    Jan ZLÁMALÍK

    2012-06-01

    Full Text Available Paper concerns the comparison of functional materials parts of cutting tools used for the production of stator and rotor sheets in the electrical industry from point of view of their life. Alternatives and the properties of metal used for the production of stator and rotor components in electrical rotating machines are analysed. The main factors affecting the life of cutting tools of functional parts are analysed, one of the most important is the cutting tool functional parts material itself. Comparison of three variants of the cuttong tool funkcional parts material – 19 436 tool steel (chrome steel according to the Czech State Standard 41 9436, 19 830 high speed steel according to the Czech State Standard 41 9830 and a special powder metallurgy product – ledeburite tool steel Vanadis 10. Useful lifes of the functional components of individual cutting tools performances can be calculated from the theoretical lifes by their multiplying the coefficients of the tool design and the cutting edges shape complexity.

  13. PowerGrid - A Computation Engine for Large-Scale Electric Networks

    Energy Technology Data Exchange (ETDEWEB)

    Chika Nwankpa

    2011-01-31

    This Final Report discusses work on an approach for analog emulation of large scale power systems using Analog Behavioral Models (ABMs) and analog devices in PSpice design environment. ABMs are models based on sets of mathematical equations or transfer functions describing the behavior of a circuit element or an analog building block. The ABM concept provides an efficient strategy for feasibility analysis, quick insight of developing top-down design methodology of large systems and model verification prior to full structural design and implementation. Analog emulation in this report uses an electric circuit equivalent of mathematical equations and scaled relationships that describe the states and behavior of a real power system to create its solution trajectory. The speed of analog solutions is as quick as the responses of the circuit itself. Emulation therefore is the representation of desired physical characteristics of a real life object using an electric circuit equivalent. The circuit equivalent has within it, the model of a real system as well as the method of solution. This report presents a methodology of the core computation through development of ABMs for generators, transmission lines and loads. Results of ABMs used for the case of 3, 6, and 14 bus power systems are presented and compared with industrial grade numerical simulators for validation.

  14. Myocardial scaffold-based cardiac tissue engineering: application of coordinated mechanical and electrical stimulations.

    Science.gov (United States)

    Wang, Bo; Wang, Guangjun; To, Filip; Butler, J Ryan; Claude, Andrew; McLaughlin, Ronald M; Williams, Lakiesha N; de Jongh Curry, Amy L; Liao, Jun

    2013-09-03

    Recently, we developed an optimal decellularization protocol to generate 3D porcine myocardial scaffolds, which preserve the natural extracellular matrix structure, mechanical anisotropy, and vasculature templates and also show good cell recellularization and differentiation potential. In this study, a multistimulation bioreactor was built to provide coordinated mechanical and electrical stimulation for facilitating stem cell differentiation and cardiac construct development. The acellular myocardial scaffolds were seeded with mesenchymal stem cells (10(6) cells/mL) by needle injection and subjected to 5-azacytidine treatment (3 μmol/L, 24 h) and various bioreactor conditioning protocols. We found that after 2 days of culturing with mechanical (20% strain) and electrical stimulation (5 V, 1 Hz), high cell density and good cell viability were observed in the reseeded scaffold. Immunofluorescence staining demonstrated that the differentiated cells showed a cardiomyocyte-like phenotype by expressing sarcomeric α-actinin, myosin heavy chain, cardiac troponin T, connexin-43, and N-cadherin. Biaxial mechanical testing demonstrated that positive tissue remodeling took place after 2 days of bioreactor conditioning (20% strain + 5 V, 1 Hz); passive mechanical properties of the 2 day and 4 day tissue constructs were comparable to those of the tissue constructs produced by stirring reseeding followed by 2 weeks of static culturing, implying the effectiveness and efficiency of the coordinated simulations in promoting tissue remodeling. In short, the synergistic stimulations might be beneficial not only for the quality of cardiac construct development but also for patients by reducing the waiting time in future clinical scenarios.

  15. Probabilistic Load-Flow Analysis of Biomass-Fuelled Gas Engines with Electrical Vehicles in Distribution Systems

    Directory of Open Access Journals (Sweden)

    Francisco J. Ruiz-Rodríguez

    2017-10-01

    Full Text Available Feeding biomass-fueled gas engines (BFGEs with olive tree pruning residues offers new opportunities to decrease fossil fuel use in road vehicles and electricity generation. BFGEs, coupled to radial distribution systems (RDSs, provide renewable energy and power that can feed electric vehicle (EV charging stations. However, the combined impact of BFGEs and EVs on RDSs must be assessed to assure the technical constraint fulfilment. Because of the stochastic nature of source/load, it was decided that a probabilistic approach was the most viable option for this assessment. Consequently, this research developed an analytical technique to evaluate the technical constraint fulfilment in RDSs with this combined interaction. The proposed analytical technique (PAT involved the calculation of cumulants and the linearization of load-flow equations, along with the application of the cumulant method, and Cornish-Fisher expansion. The uncertainties related to biomass stock and its heating value (HV were important factors that were assessed for the first time. Application of the PAT in a Spanish RDS with BFGEs and EVs confirmed the feasibility of the proposal and its additional benefits. Specifically, BFGEs were found to clearly contribute to the voltage constraint fulfilment. The computational cost of the PAT was lower than that associated with Monte-Carlo simulations (MCSs.

  16. The aerodynamic design and performance of the General Electric/NASA EEE fan. [Energy Efficient Engine

    Science.gov (United States)

    Sullivan, T. J.; Hager, R. D.

    1983-01-01

    The aerodynamic design and test results of the fan and quarter-stage component for the GE/NASA Energy Efficient Engine (EEE) are presented. The fan is a high bypass ratio, single-stage design having 32 part-span shrouded rotor blades, coupled with a unique quarter-stage arrangement that provides additional core-stream pressure ratio and particle separation. The fan produces a bypass pressure ratio of 1.65 at the exit of the low aspect ratio vane/frame and a core-stream pressure ratio of 1.67 at the entrance to the core frame struts. The full-scale fan vehicle was instrumented, assembled and tested as a component in November 1981. Performance mapping was conducted over a range of speeds and bypass ratios using individually-controlled bypass and core-stream discharge valves. The fan bypass and core-stream test data showed excellent results, with the fan exceeding all performance goals at the important engine operating conditions.

  17. Turbulence measurements in the compressor exit flow of a General Electric CF6-50 engine

    Science.gov (United States)

    Taylor, J. R.

    1979-01-01

    Ruggedized cooled film probes were used to measure CF6-50 compressor exit turbulence properties at three different engine idle condition test points. The turbulence probe was coupled to a constant temperature anemometer and signal conditioning system. An on-line readout system connected to the anemometer was used to check the data as it was acquired. At engine idle conditions, the turbulence intensity ranged from 4.8 percent to 5.6 percent and the length scale ranged from 5.64 cm to 6.95 cm. The length scale values are somewhat larger than the passage height at the measurement plane (5.54 cm), which indicates that the shape of the turbulent eddies are elongated in the axial direction. The microscale values range from about 0.73 cm to about 0.98 cm. Power spectral density distributions show that a large proportion of the turbulent energy at the measurement plane is concentrated at frequencies below one kilohertz.

  18. Memorial to Professor Antonio Barone

    Science.gov (United States)

    Tafuri, Francesco; Pepe, Giampiero; Vaglio, Ruggero

    2014-04-01

    Antonio Barone prematurely passed away on 4 December 2011 at the age of 72, after a one-year battle with cancer. He left behind his wife Sveva and his two sons, Alberto and Livio. Antonio was Professor Emeritus at the University of Napoli Federico II, where he had been teaching for about 40 years. The initial research activity of Antonio was in the field of nuclear physics. In this context, almost 45 years ago, the Ge 'Lithium drift' semiconductor detectors represented a novelty, due to the high energy resolution enabled by those devices. Superconductors stimulated new approaches to radiation detection and this motivated Antonio's interest towards superconductivity. Following the birth of the Laboratorio di Cibernetica of the CNR in 1967 he was given the opportunity to work on a joint USA-Italy project (University of Wisconsin, Madison and CNR Naples) in the field of superconductivity on the peculiar subject of the superconductive 'Neuristors'. His research activity on Josephson junctions opened up a wide variety of very stimulating subjects in which he was deeply involved, ranging from the soliton propagation in 'long' Josephson structures to fluctuations phenomena, from light-sensitive junctions and proximity effect to the development of innovative superconducting devices. The strong interaction of Antonio with the Landau Institute for Theoretical Physics of the Academy of Sciences in Moscow, characterizes a long period of his research activity with a precious merging of theoretical and experimental aspects. This body of work converged into the famous monograph on the 'Physics and Applications of the Josephson Effect', written in collaboration with Gianfranco Paternò in 1982. This rapidly became the reference text for the Josephson effect, as documented by thousands of citations and the fact that it was translated into Russian, Japanese and Chinese. In 1983 Antonio was awarded the highest academic title of 'Doctor of the Physical-Mathematical Sciences' by the

  19. Recommended engineering practice to enhance the EMI/EMP immunity of electric power systems

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, C.L.; Feero, W.E. (Electric Research and Management, Inc., State College, PA (United States))

    1992-12-01

    Many papers and reports have been written on studies conducted by the Oak Ridge National Laboratory and investigations by others on the effect of high-altitude electromagnetic pulses (HEMP) on electric power systems. More than 100 of the published unclassified documents were reviewed with the objectives of: 1. summarizing the mitigation methods suggested in the documents and providing a subjective evaluation of each 2. discussing various standards . that presently apply to the effects of HEMP on utility systems and suggesting additions or modifications or new standards where deficiencies appear to exist; and 3. recommending future studies or actions to improve the utility response to HEMP. While all three components of HEMP were mentioned, only the early-time short-duration E[sub 1] pulse and the late-time long-duration E[sub 3] pulse were considered in detail; the E[sub 2] intermediate component was not considered to affect the power system significantly.

  20. Recommended engineering practice to enhance the EMI/EMP immunity of electric power systems

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, C.L.; Feero, W.E. [Electric Research and Management, Inc., State College, PA (United States)

    1992-12-01

    Many papers and reports have been written on studies conducted by the Oak Ridge National Laboratory and investigations by others on the effect of high-altitude electromagnetic pulses (HEMP) on electric power systems. More than 100 of the published unclassified documents were reviewed with the objectives of: 1. summarizing the mitigation methods suggested in the documents and providing a subjective evaluation of each 2. discussing various standards . that presently apply to the effects of HEMP on utility systems and suggesting additions or modifications or new standards where deficiencies appear to exist; and 3. recommending future studies or actions to improve the utility response to HEMP. While all three components of HEMP were mentioned, only the early-time short-duration E{sub 1} pulse and the late-time long-duration E{sub 3} pulse were considered in detail; the E{sub 2} intermediate component was not considered to affect the power system significantly.

  1. Manipulation of magnetic phase separation and orbital occupancy in manganites by strain engineering and electric field

    Science.gov (United States)

    Cui, Bin; Song, Cheng; Pan, Feng; Key Laboratory of Advanced Materials (MOE) Team

    2015-03-01

    The modification of electronic phases in correlated oxides is one of the core issues of condensed matter. We report the reversible control of ferromagnetic phase transition in manganite films by ionic liquid gating, replicating the La1-xSrxMnO3 (LSMO) phase diagram. The formation and annihilation of an insulating and magnetically hard phase in the soft magnetic matrix, which randomly nucleates and grows across the film, is directly observed under different gate voltages (VG) . The realization of reversible metal-insulator transition in colossal magnetoresistance materials can lead to the development of four-state memories. The orbital occupancy and magnetic anisotropy of LSMO films are manipulated by VG in a reversible and quantitative manner. Positive and negative VG increases and reduces the occupancy of the orbital and magnetic anisotropy that were initially favored by strain (irrespective of tensile and compressive), respectively. This finding fills in the blank of electrical manipulation of four degrees of freedom in correlated system.

  2. Direct optimization of heterogeneous systems in electrical engineering; Optimisation directe de systemes heterogenes en Genie electrique

    Energy Technology Data Exchange (ETDEWEB)

    Fefermann, Y.

    2002-12-15

    Today, a global viewpoint in the design of devices called 'system approach', is imposed by couplings between physical fields and multiple interactions between sub-systems. Indeed, concerning static and electromechanical converters, or control systems, numerous issues of design are more and more mastered when each element is separately conceived. However, as soon as designing an heterogeneous system seen as a 'complex of elements in interaction' is at stake, arises the problem of the global optimization with respect to multiple criteria which characterize the quality of its behavior. The works realized in this thesis concern the multi-criteria optimization of systems by direct methods not related to the analytical calculation of the gradient. These techniques are applied to a typical electrical vehicle. We propose for each of the sub-systems a modeling adapted to the problem. In particular, an original method based on variations by similarity was elaborated for the design procedure of the PMSM machine. The parameters (DC supply voltage, geometrical parameters,...) can be fitted to all the system levels. They optimize performance criteria: minimization of the losses, of the embedded mass,... The methods of optimization used to resolve this non-linear problem are the Nelder and Mead's Simplex and Hooke and Jeeves algorithm. The constraints of the problem are treated by penalties (exact and quadratic) and a simple heuristic is proposed allowing a constraints normalization and a better algorithm convergence. The optimization results enable to underline the couplings between the various sub-systems, a significant point of the analysis. They have also shown the interest of a global approach in the design and the study of electric systems. (author)

  3. Tomorrow's Professor, Preparing for an Academic/Research Career

    Science.gov (United States)

    Reis, R. M.

    1998-12-01

    Richard M. Reis, author of Tomorrow's Professor: Preparing for Academic Careers in Science and Engineering, and a former executive officer of the Astronomical Society of the Pacific, will discuss the essential elements in preparing for, finding, and succeeding at academic careers in today's higher education environment. He will begin with a no-hold-barred look at the academic enterprise and the important ways it differs for all other institutions in society. The unique nature engineering and science - with a particular emphasis on astronomy and astrophysics - in higher education and the special problems facing new professors in these fields will be looked at next. Dr. Reis will then describe a powerful preparation strategy to make graduate students and postdocs competitive for academic positions while maintaining their options for worthwhile careers in government and industry. He will then explain how to get the offer you want and the start-up package you need to ensure success in your first critical years on the job. Finally, Dr. Reis will summarize essential insights from experienced faculty in all areas of science and engineering on how to develop a rewarding academic career and a quality of life that is both balanced and fulfilling. Plenty of time will be set aside for active interaction and discussion.

  4. PROFESSORES: IMAGENS DO FUTURO PRESENTE

    Directory of Open Access Journals (Sweden)

    Maitê Alves Bezerra

    2014-06-01

    Full Text Available Ao observar a comunidade portuguesa que busca compreender a historicidade das formas e dos processos de escolarização por meio do estabelecimento de intenso diálogo com outras comunidades, é impossível não dar destaque à figura de António Manuel Seixas Nóvoa. Nascido em Lisboa no ano de 1954, aos 18 anos inicia o curso de Ciências da Educação na Universidade de Lisboa. Após lecionar em importantes universidades tais como Paris V, Oxford e Columbia University, atualmente acumula as posições de reitor da Universidade de Lisboa e professor catedrático da Faculdade de Psicologia e de Ciências da Educação na Instituição. Nóvoa tem se destacado à frente de debates internacionais a respeito da história da educação e educação comparada.

  5. Evaluation of the Use of Two Teaching Techniques in Engineering

    Directory of Open Access Journals (Sweden)

    Jose Antonio Alvarez Salas

    2014-06-01

    Full Text Available This paper presents an analysis of the practical implementation of two teaching techniques so-called Problem-Based Learning and Cooperative Learning. These techniques were applied to some courses in the Department of Mechanical and Electrical Engineering and evaluated through assessment rubrics. In a sample of students and teachers, the assessment rubrics were applied to numerically evaluate the proportion of each course, in which the teacher uses traditional teaching versus teaching for meaningful learning. The results of the presented analysis allow to verify the use of these teaching techniques by professors of the Department of Mechanical and Electrical Engineering. This activity was developed as a part of the work established by the Institutional Development Plan of the Faculty of Engineering, which includes the strategic objective of developing an innovative educational model in the following ten years.

  6. Design study of a 15 kW free-piston Stirling engine-linear alternator for dispersed solar electric power systems

    Science.gov (United States)

    Dochat, G. R.; Chen, H. S.; Bhate, S.; Marusak, T.

    1979-01-01

    A conceptual design of a free piston solar Stirling engine-linear alternator which can be designed and developed to meet the requirements of a near-term solar test bed engine with minimum risks was developed. The conceptual design was calculated to have an overall system efficiency of 38% and provide 15kW electric output. The free piston engine design incorporates features such as gas bearings, close clearance seals, and gas springs. This design is hermetically sealed to provide long life, reliability, and maintenance free operation. An implementation assessment study performed indicates that the free piston solar Stirling engine-linear alternator can be manufactured at a reasonable price cost (direct labor plus material) of $2,500 per engine in production quantities of 25,000 units per year. Opportunity for significant reduction of cost was also identified.

  7. Experiences of a Multidisciplinary Course on Geo-Signal Processing from a DSP Perspective Offered in Electrical Engineering at King Fahd University of Petroleum and Minerals

    Science.gov (United States)

    Mousa, W. A.

    2012-01-01

    The purpose of this paper is to share the experience gained in, and the efforts made toward, introducing and implementing a new course in the challenging and important area of geophysical signal processing at the Electrical Engineering (EE) Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia. The new course,…

  8. "Design for All in the Context of the Information Society": Integration of a Specialist Course in a Generalist M.Sc. Program in Electrical and Electronics Engineering

    Science.gov (United States)

    Godino-Llorente, J. I.; Fraile, R.; Gonzalez de Sande, J. C.; Osma-Ruiz, V.; Saenz-Lechon, N.

    2012-01-01

    This paper describes an educational research experience that took place in the Electrical & Electronics Engineering Master's program offered at the Escuela Universitaria de Ingenieria Tecnica de Telecomunicacion, Universidad Politecnica de Madrid, Madrid, Spain. The focus is to provide details of the motivation behind and the design and…

  9. IEEE Milestone at CERN - W Cleon Anderson (right), president of the Institute of Electrical and Electronics Engineers, unveils the Milestone plaque at CERN, together with Georges Charpak

    CERN Multimedia

    Maximilien Brice

    2005-01-01

    At a ceremony on 26 September at CERN, W Cleon Anderson, president of the Institute of Electrical and Electronics Engineers (IEEE), formally dedicated a "Milestone" plaque in recognition of the invention of electronic particle detectors at CERN. The plaque was unveiled by Anderson and Georges Charpak, the Nobel-prize winning inventor of wire-chamber technology at CERN.

  10. BEST: A Learner-Centered Workplace Literacy Partnership of the Vermont Institute for Self-Reliance and General Electric Aircraft Engines Rutland, VT. Final Performance Report.

    Science.gov (United States)

    Lashof, Judith R.

    The Vermont Institute for Self Reliance (VISR) conducted a Basic Educational Skills for Training (BEST) program, a national demonstration project in workplace literacy, from April 1990 to March 1992. BEST provided learner-centered, context-based literacy instruction onsite, on company time, at two General Electric (GE) Aircraft Engines Rutland…

  11. Development of Web-Based Learning Environment Model to Enhance Cognitive Skills for Undergraduate Students in the Field of Electrical Engineering

    Science.gov (United States)

    Lakonpol, Thongmee; Ruangsuwan, Chaiyot; Terdtoon, Pradit

    2015-01-01

    This research aimed to develop a web-based learning environment model for enhancing cognitive skills of undergraduate students in the field of electrical engineering. The research is divided into 4 phases: 1) investigating the current status and requirements of web-based learning environment models. 2) developing a web-based learning environment…

  12. Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle

    Energy Technology Data Exchange (ETDEWEB)

    None

    2012-01-31

    The thermoelectric generator shorting system provides the capability to monitor and short-out individual thermoelectric couples in the event of failure. This makes the series configured thermoelectric generator robust to individual thermoelectric couple failure. Open circuit detection of the thermoelectric couples and the associated short control is a key technique to ensure normal functionality of the TE generator under failure of individual TE couples. This report describes a five-year effort whose goal was the understanding the issues related to the development of a thermoelectric energy recovery device for a Class-8 truck. Likely materials and important issues related to the utility of this generator were identified. Several prototype generators were constructed and demonstrated. The generators developed demonstrated several new concepts including advanced insulation, couple bypass technology and the first implementation of skutterudite thermoelectric material in a generator design. Additional work will be required to bring this system to fruition. However, such generators offer the possibility of converting energy that is otherwise wasted to useful electric power. Uur studies indicate that this can be accomplished in a cost-effective manner for this application.

  13. Polypyrrole/Alginate Hybrid Hydrogels: Electrically Conductive and Soft Biomaterials for Human Mesenchymal Stem Cell Culture and Potential Neural Tissue Engineering Applications.

    Science.gov (United States)

    Yang, Sumi; Jang, LindyK; Kim, Semin; Yang, Jongcheol; Yang, Kisuk; Cho, Seung-Woo; Lee, Jae Young

    2016-11-01

    Electrically conductive biomaterials that can efficiently deliver electrical signals to cells or improve electrical communication among cells have received considerable attention for potential tissue engineering applications. Conductive hydrogels are desirable particularly for neural applications, as they can provide electrical signals and soft microenvironments that can mimic native nerve tissues. In this study, conductive and soft polypyrrole/alginate (PPy/Alg) hydrogels are developed by chemically polymerizing PPy within ionically cross-linked alginate hydrogel networks. The synthesized hydrogels exhibit a Young's modulus of 20-200 kPa. Electrical conductance of the PPy/Alg hydrogels could be enhanced by more than one order of magnitude compared to that of pristine alginate hydrogels. In vitro studies with human bone marrow-derived mesenchymal stem cells (hMSCs) reveal that cell adhesion and growth are promoted on the PPy/Alg hydrogels. Additionally, the PPy/Alg hydrogels support and greatly enhance the expression of neural differentiation markers (i.e., Tuj1 and MAP2) of hMSCs compared to tissue culture plate controls. Subcutaneous implantation of the hydrogels for eight weeks induces mild inflammatory reactions. These soft and conductive hydrogels will serve as a useful platform to study the effects of electrical and mechanical signals on stem cells and/or neural cells and to develop multifunctional neural tissue engineering scaffolds. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Professor dr hab. Anna Maria Bujakiewicz

    Directory of Open Access Journals (Sweden)

    Anna Kujawa

    2015-08-01

    Full Text Available The article presents the biography and scientific achievements of Professor Anna Bujakiewicz. After receiving her master’s degree and doctorate in biology and mycology from Adam Mickiewicz University in Poznań, Professor Bujakiewicz continued her exciting research and teaching on mycology at her Alma Mater Posnaniensis for more than 50 years. Her publications in this field include many books, articles, and other scholarly reports.

  15. Micro generation of electricity with gasification gas in a engine generator in dual mode; Microgeracao de eletricidade com gas de gaseificacao num motor gerador dual

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcelo Jose da; Souza, Samuel Nelson Melegari de; Souza, Abel Alves de; Ricieri, Reinaldo P. [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PE (Brazil)], E-mail: marcelo_js07@hotmail.com

    2010-07-01

    Among the alternatives to the increase of world energy demand the use of biomass as energy source is one of the most promising as it contributes to reducing emissions of carbon dioxide in the atmosphere. Gasification is a process technology of biomass energy in a gaseous biofuel. The fuel gas got a low calorific value that can be used in diesel engine in dual mode for power generation in isolated communities. This study aimed to evaluate the reduction in the consumption of oil diesel an engine generator, using gas from gasification of wood. The engine generator brand used, it was a BRANCO, with direct injection power of 10 hp and mated to an electric generator 5,5 kW. The fuel gas was produced in a gasifier type co-current. The engine generator was put on load system from 0.5 kW to 3.5 kW through electric bank of heaters. For the oil diesel savings, the gas was injected mixed with intake air, as the oil diesel was normally injected by the injector of the engine (motor dual). The consumption od diesel was measured diesel by means of a precision scale. It was concluded that the engine converted to dual mode when using the gas for the gasification of wood showed a decrease in diesel consumption by up to 57%. (author)

  16. Assistant professor's National Science Foundation CAREER grant will help understand cell cycle model

    OpenAIRE

    Mackay, Steven D.

    2010-01-01

    Yang Cao, an assistant professor in the computer science department at Virginia Tech's College of Engineering, has won a $550,000 National Science Foundation Faculty Early Career Development (CAREER) award to develop computer simulation methods that will better understand the complex, discrete, and stochastic cell cycle model.

  17. Differences between Male Students' and Female Students' Perception of Professors

    Science.gov (United States)

    Tomkiewicz, Joseph; Bass, Kenneth

    2008-01-01

    This study is an empirical examination of possible differences between female and male college seniors' perceptions between male and female college professors. Subjects were presented with three variations of a scale designed to measure students' perceptions of university professors in general, female professors, and male professors. These…

  18. Evaluation of catalyzed and electrically heated filters for removal of particulate emissions from diesel-A- and JP-8-fueled engines.

    Science.gov (United States)

    Kelly, Kerry E; Wagner, David A; Lighty, JoAnn S; Sarofim, Adel F; Bretecher, Brad; Holden, Bruce; Helgeson, Norm; Sahay, Keshav; Nardi, Zack

    2004-01-01

    In-service diesel engines are a significant source of particulate matter (PM) emissions, and they have been subjected to increasingly strict emissions standards. Consequently, the wide-scale use of some type of particulate filter is expected. This study evaluated the effect of an Engelhard catalyzed soot filter (CSF) and a Rypos electrically heated soot filter on the emissions from in-service diesel engines in terms of PM mass, black carbon concentration, particle-bound polycyclic aromatic hydrocarbon concentration, and size distribution. Both filters capture PM. The CSF relies on the engine's exhaust to reach the catalyst regeneration temperature and oxidize soot, whereas the electrically heated filter contains a heating element to oxidize soot. The filters were installed on several military diesel engines. Particle concentrations and compositions were measured before and after installation of the filter and again after several months of operation. Generally, the CSF removed at least 90% of total PM, and the removal efficiency improved or remained constant after several months of operation. In contrast, the electrical filters removed 44-69% of PM mass. In addition to evaluating the soot filters, the sampling team also compared the results of several real-time particle measurement instruments to traditional filter measurements of total mass.

  19. Identification of non-technical skills from the resilience engineering perspective: a case study of an electricity distributor.

    Science.gov (United States)

    Wachs, Priscila; Righi, Angela Weber; Saurin, Tarcisio Abreu

    2012-01-01

    Training in non-technical skills (NTS) does not usually question the design of the work system, and thus focuses narrowly on workers as the unit of analysis. This study discusses how the identification of NTS, a major step for developing an NTS training program, might be re-interpreted from the perspective of resilience engineering (RE). This discussion is based on a case study of identifying NTS for electricians who perform emergency maintenance activities in an electricity distribution power line. The results of the case study point out that four data analysis procedures might operationalize the RE perspective: (a) identifying factors that make the work difficult and which could be integrated into NTS training scenarios; (b) identifying recommendations for re-designing the system, in order either to reduce or eliminate the need for NTS; (c) classifying the NTS into pragmatic categories, which are meaningful for workers; and (d) regarding the identification of NTS as an opportunity to give visibility to adaptations carried out by workers.

  20. EDITORIAL: 65th Birthday of Professor Hauptmann 65th Birthday of Professor Hauptmann

    Science.gov (United States)

    Lucklum, Ralf

    2009-12-01

    The papers in this special feature have been contributed by scientific partners in international research projects and from former PhD students of the Editor-in-Chief of this journal, Professor Dr Peter Hauptmann. The motivation for this feature is the occasion of Peter Hauptmann's 65th birthday on 24 July 2009 and his retirement from his chair at the Otto-von-Guericke-University, Magdeburg, Germany this autumn. Peter graduated in Physics at the Technical University Dresden and received his PhD from the Technical University Leuna-Merseburg in 1973. He habilitated in 1979. With his appointment at the Faculty of Electrical Engineering and Information Technology in 1985 the Chair of Measurement Science extended its profile to the fast growing area of sensors. Peter was one of the very early developers of ultrasonic sensor systems for process monitoring and quality assurance. The working style here was characteristic of all his future activities. He combined his background in theory and experiment on ultrasonic wave propagation and its application to material science with the advantages of rapidly developing capabilities in microelectronics and data processing. The results have meanwhile found their way into products that are now on the market worldwide. Germany's reunification opened the door to the international sensor community and the most challenging sensor research areas. Peter Hauptmann very soon became a well respected colleague and was consequently appointed as member of the Technical Program Committee of the most important sensor conferences, elected member and head of expert groups of research associations and funding organizations, and of course reviewer of many scientific journals. Nowadays Peter Hauptmann can rightly be called one of the key players in the area of sensors. Professor Hauptmann's research interests combine fundamental aspects of the sensor transduction scheme with application issues up to the use of the sensor system in the industrial world

  1. A Study of Fuel Economy Improvement in a Plug-in Hybrid Electric Vehicle using Engine on/off and Battery Charging Power Control Based on Driver Characteristics

    Directory of Open Access Journals (Sweden)

    Seulgi Lee

    2015-09-01

    Full Text Available In this study, driving data for various types of drivers are collected using a VIDE (virtual integrated driving environment, and a driver model is developed. To represent the driver tendencies quantitatively, the DDA (degree of driver aggression is proposed based on fuzzy logic. DDA has a 0-1 value; the closer the DDA is to one, the more aggressive the driver. Using the DDA, an engine on/off and battery charging power control algorithm are developed to improve the fuel economy of a power-split-type plug-in hybrid electric vehicle. The engine on/off control reduces the frequent engine on/off caused by aggressive driving, whereas the battery charging power control maintains the battery state of charge (SOC by operating the engine according to the DDA. It is found that the proposed control algorithm improves fuel economy by 17.3% compared to the existing control for an aggressive driver.

  2. Schnabel Engineering Lecture

    OpenAIRE

    Cording, Edward

    2014-01-01

    Schnabel Engineering is pleased to bring you Dr. Edward J. Cording as our eighth lecturer of this series. Dr. Cording is Professor Emeritus of Civil and Environmental Engineering at the University of Illinois at Urbana-Champaign where he has taught and performed research in geotechnical engineering, focusing on rock mechanics, soil-structure interaction, and underground construction. The field has been his laboratory, on engineering projects; beginning in the 1960's with large deep caverns ...

  3. An experimental study of the enhanced heating capacity of an electric heat pump (EHP) using the heat recovered from a gas engine generator

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Cheol Min; Chang, Se Dong [HAC R and D Laboratory, LG Electronics, 327-23 Gasan-Dong, Geumcheon-gu, Seoul 153-802 (Korea); Lee, Jaekeun; Hwang, Yujin [School of Mechanical Engineering, Pusan National University, San 30, Changjeon-Dong, Keumjeong-Ku, Busan 609-735 (Korea)

    2009-11-15

    This paper is concerned with the effect of recovered heat on the heating capacity of an Electric Heat Pump (EHP), which is supplied with electric power and recovered heat from a gas engine generator system. Two methods of supplying recovery heat are examined: (i) to the refrigerant with the discharge line heat exchanger (HEX), and (ii) to the refrigerant of the evaporator with the sub-evaporator. Heating capacity, input power and coefficient of performance (COP) were investigated and compared for each heat recovery method. Conclusively, we found that the second method was most reasonable to recover wasted heat and increased system COP by 215%. (author)

  4. Accounting Professor Qualification in Digital Age: A Perception Study on Brazilian Professors

    Science.gov (United States)

    Vendruscolo, Maria Ivanice; Behar, Patrícia Alejandra

    2015-01-01

    This papers aims at analyzing the perception of Accounting professors about the necessary qualifications in Accounting undergraduate courses. The contribution of this study is to theoretically discuss the education of Accounting professors, with empirical data, because Accounting teaching requires specific competencies in the digital area. The…

  5. Preliminary Performance Data on General Electric Integrated Electronic Control Operating on J47 RX1-3 Turbojet Engine in NACA Altitude Wind Tunnel

    Science.gov (United States)

    Blivas, Darnold; Taylor, Burt L., III

    1950-01-01

    Performance data obtained with recording oscillographs are presented to show the transient response of the General Electric Integrated Electronic Control operating on the J47 RXl-3 turbo-Jet engine over a range of altitudes from 10,000 to 45,000 feet and at ram pressure ratios of 1.03 and 1.4. These data represent the performance of the final control configuration developed after an investigation of the engine transient behavior in the NACA altitude wind tunnel. Oscillograph traces of controlled accelerations (throttle bursts),oontrolled decelerations (throttle chops), and controlled altitude starts are presented.

  6. STEM Education in Jordan Applicable to Developing Future Geophysicists: An Example Combining Electrical Engineering and Medical Research

    Science.gov (United States)

    Fraiwan, A.; Khadra, L.; Shahab, W.; Olgaard, D. L.

    2010-12-01

    Students in developing countries interested in STEM disciplines (science, technology, engineering & math) often choose majors that will improve their job opportunities in their home country when they graduate, e.g. engineering or medicine. Geoscience might be chosen as a sub-discipline of civil engineering, but rarely as a primary major unless there are local economic natural resources. The Institute of International Education administers the ExxonMobil Middle East and North Africa region scholars program designed to develop skilled students with a focus on geoscience and to build relationships with academic leaders by offering select faculty the opportunity to participation in the AGU fall meeting. At the Jordan University of Science and Technology (JUST), research in electrical engineering applied to medicine has potential links to geosciences. In geophysics, neural wavelet analysis (NWA) is commonly used to process complex seismic signals, e.g. for interpreting lithology or identifying hydrocarbons. In this study, NWA was used to characterize cardiac arrhythmias. A classification scheme was developed in which a neural network is used to identify three types of arrhythmia by distinct frequency bands. The performance of this scheme was tested using patient records from two electrocardiography (ECG) databases. These records contain normal ECG signals, as well as abnormal signals from atrial fibrillation (AF), ventricular tachycardia (VT) and ventricular fibrillation (VF) arrhythmias. The continuous wavelet transform is applied over frequencies of 0-50 Hz for times of 0-2s. For a normal ECG, the results show that the strongest signal is in a frequency range of 4-10 Hz. For AF, a low frequency ECG signal in the range of 0-5 Hz extends over the whole time domain. For VT, the low frequency spectrum is in the range of 2-10 Hz, appearing as three distinct bands. For VF, a continuous band in the range of 2-10 Hz extends over the whole time domain. The classification of

  7. The housekeeper and the professor a novel

    CERN Document Server

    Ogawa, Yoko

    2010-01-01

    He is a brilliant math Professor with a peculiar problem—ever since a traumatic head injury, he has lived with only eighty minutes of short-term memory. She is an astute young Housekeeper—with a ten-year-old son—who is hired to care for the Professor. And every morning, as the Professor and the Housekeeper are introduced to each other anew, a strange and beautiful relationship blossoms between them. Though he cannot hold memories for long (his brain is like a tape that begins to erase itself every eighty minutes), the Professor's mind is still alive with elegant equations from the past. And the numbers, in all of their articulate order, reveal a sheltering and poetic world to both the Housekeeper and her young son. The Professor is capable of discovering connections between the simplest of quantities—like the Housekeeper's shoe size—and the universe at large, drawing their lives ever closer and more profoundly together, even as his memory slips away. Yoko Ogawa's The Housekeeper and the Professo...

  8. High saving potentials and functional enhancements. Diesel-electric hybrid drives in mobile engines; Hohe Einsparpotenziale und funktionale Erweiterungen. Dieselelektrische Hybridantriebe in mobilen Arbeitsmaschinen

    Energy Technology Data Exchange (ETDEWEB)

    Dietel, Harald [Sensor-Technik Wiedemann (STW), Kaufbeuren (Germany); Kuhn, Michael; Hemscheidt, Michael [Kaessbohrer, Laupheim (Germany)

    2009-07-01

    With increasing environmental awareness as well as rising fuel prices, the issue of energy efficiency has come into the focus of public interest. Hybrid drives are an interesting option, usually in the form of passenger cars with a spark ignition engine and (at least) one electric motor in a single powertrain involving significant saving potentials and energy resources. Electrification of vehicles offers furtheron possibilities, which conventional systems can't arrive. (orig./GL)

  9. Analysis of technical-economic requirements for the construction of a solar power plant on the roof of the business building of the Electrical Engineering Institute 'Nikola Tesla'

    OpenAIRE

    Grbić, Maja; Antić, Radoslav; Ponoćko, Jelena; Mikulović, Jovan; Đurišić, Željko

    2014-01-01

    This paper presents an analysis of the technical-economic requirements for the construction of a solar power plant on the roof of the business building of the Electrical Engineering Institute 'Nikola Tesla' in Belgrade. Calculation of solar irradiation is performed and the conceptual design of the disposition of solar panels on the roof of the building is shown as well as their connections to the inverters. Conditions for connecting the plant to the distribution network are checked and an eco...

  10. RELIABILITY СONTROL OF ELECTRIC NETWORK SYSTEM AT JOINT-STOCK COMPANY «LENENERGO» UNDER CONDITIONS OF POWER ENGINEERING MODERNIZATION

    Directory of Open Access Journals (Sweden)

    A. P. Vasiliev

    2005-01-01

    Full Text Available During the last decade a general trend is observed among power engineering companies towards the deregulation of production activity. This social and political movement causes revaluation of reliability control of electric network system policy at Joint-Stock Company «Lenenergo», elaboration and development of methods and means for solution of integrated problems involving the whole process from putting into operation till equipment writing off.

  11. Engineering and Economic Analysis of Non-Electric Applications for Geothermal Heat Resources at Desert Hot Sprlngs, Califormia

    Energy Technology Data Exchange (ETDEWEB)

    None

    1976-04-28

    A study will be conducted to evaluate non-electric applications of an identifiable geothermal energy resource in terms of engineering, economic, and institutional considerations and to formulate the preliminary design and implementation plan of the most promising demonstration or industrial development project. The purpose of this study is to determine potential options that the Energy Research and Development Administration may exercise in developing low- and moderate-temperature hydrothermal resources as an economically and environmentally acceptable alternate energy source and in enhancing the development of a coherent geothermal industry. The study will focus upon a reservoir-specific, multiple use application of hydrothermal resources underlying the City of Desert Hot Springs. Potential applications to be considered include a space conditioning utility network for commercial and residential buildings and an aquacultural and agricultural installation in individual as well as energy cascading systems. To extend the utility of the study findings, the evaluation of potential applications will be conducted within the wider context of satisfying broad regional needs. The study will also be conducted in the framework of a moving baseline to account for emerging technologies and possible future cost escalations and availability of alternate energy sources. The progress of this study will be monitored by an Advisory Board comprised of a representative cross-section of the geothermal community. Results of the study will be disseminated through reports and a workshop to maximize information exchange with the geothermal community. In addition, a self-start manual will be prepared and distributed so that interested communities having similar geothermal resources can readily evaluate appropriate nonelectric applications to meet their specific needs and gain added insight into how best to implement these applications.

  12. School of Electrical Engineering.

    Science.gov (United States)

    Farley, D. T.

    1983-01-01

    The possibility of making the antenna of an MST radar too large is pointed out. It is not that the signal ceases to become stronger beyond some critical antenna size; the received scattered signal actually becomes weaker as the antenna size is increased whenever the target is in the near field, Fresnel region of the antenna. The Arecibo antenna is a case in point. It is supposed that MST work would benefit to use a feed which illuminated only a portion of the dish.

  13. Professor Karel Oštir zum andenken

    Directory of Open Access Journals (Sweden)

    Bojan Čop

    1973-12-01

    Full Text Available Die Redaktion der Zeitschrift tinguistica beschloss am Anfang des Jahres 1973, den XIII.Jg. der Vollendung des fünfundachtzigsten Lebensjahres, die Professor Karel Oštir am 13. Oktober feiern sollte, zu widmen. Da sich aber das Sammeln des Materials für diesen Jahrgang sowie der Druck des XII. Jahrganges allzusehr in die Länge gezogen hatten, ist uns das unerbittliche Schicksal zuvorgekommen: am 27. Dezember 1973 ist Professor Karel Oštir sanft entschlafen. Das Leben eines der eigenartigsten Sprachwissenschaftler aller Zei ten hat sich so erfüllt. Aus einer Festschrift musste nun eine Gedenkschrift werden.

  14. Professor Stewart's casebook of mathematical mysteries

    CERN Document Server

    Stewart, Ian

    2014-01-01

    Like its wildly popular predecessors Cabinet of Mathematical Curiosities and Hoard of Mathematical Treasures, Professor Stewart's brand-new book is a miscellany of over 150 mathematical curios and conundrums, packed with trademark humour and numerous illustrations. In addition to the fascinating formulae and thrilling theorems familiar to Professor Stewart's fans, the Casebook follows the adventures of the not-so-great detective Hemlock Soames and his sidekick Dr John Watsup (immortalised in the phrase 'Watsup, Doc?'). By a remarkable coincidence they live at 222B Baker Street, just a

  15. Marine Hydrokinetic (MHK) Systems: A Systems Engineering Approach to Select Locations for the Practical Harvest of Electricity from Shallow Water Tidal Currents

    Science.gov (United States)

    Domenech, John

    Due to increasing atmospheric CO2 concentration and its effect on global climates, the United States Environmental Protection Agency (EPA) proposes a Clean Power Plan (CPP) mandating CO2 reductions which will likely force the early retirement of inefficient, aging power plants. Consequentially, removing these plants equates to a shortfall of approximately 66 GW of electricity. These factors add to the looming resource problems of choosing whether to build large replacement power plants or consider alternative energy sources as a means to help close the gap between electricity supply and demand in a given region. One energy source, shallow water tidal currents, represents opportunities to convert kinetic energy to mechanical forms and provide electricity to homes and businesses. Nearly 2,000 National Oceanic Atmospheric Administration (NOAA) tidal current data points from Maine to Texas are considered. This paper, based on systems engineering thinking, provides key attributes (e.g. turbine efficiency, array size, transmission losses) for consideration as decision makers seek to identify where to site Marine Hydrokinetic (MHK) systems and the number of homes powered by the practical harvest of electricity from tidal currents at those locations with given attributes. A systems engineering process model is proposed for consideration as is a regression based equation to estimate MHK machine parameters needed for power a given number of homes.

  16. AN ANTHOLOGY OF THE DISTINGUISHED ACHIEVEMENTS IN SCIENCE AND TECHNIQUE. PART 33: ELECTROMAGNETIC COMPATIBILITY AND PROTECTION FROM ACTION OF POWERFUL ELECTROMAGNETIC INTERFERENCE OF RADIOELECTRONIC, ELECTRICAL ENGINEERING AND ELECTRIC POWER EQUIPMENT

    Directory of Open Access Journals (Sweden)

    M.I. Baranov

    2016-09-01

    Full Text Available Purpose. Implementation of brief analytical review of basic scientific and technical achievements in area of electromagnetic compatibility (EMC and protection from destabilizing and striking action of powerful electromagnetic interference (PEMI of natural and artificial origin of radioelectronic, electrical engineering and electric power equipment. Methodology. Scientific methods of collection, analysis and analytical treatment of scientific and technical information in a sphere EMC and such areas of knowledge’s as radioelectronics, electrical engineering and electric power engineering. Results. A brief scientific and technical review is resulted modern positions problems EMC and protection of equipment from action on them PEMI. It is shown that PEMI can result in failures in-process and death of examined equipment. Annual harm in the industrially developed countries of the world from the striking affecting of PEMI modern equipment with integral microcircuits and semiconductor devices can make ten of milliards of USD. The basic methods of protection of equipment are resulted from PEMI and protective devices (PD, intended for the increase of effectiveness of modern equipment to the action of external PEMI. Principles of work of the resulted PD and their basic technical descriptions are described. Originality. On the basis of materials of scientific monographs, journal publications, normative documents and internet-reports systematization of basic PD, in-use presently in an area EMC and protection of different equipment from the hazard agency of external PEMI is executed. Practical value. Popularization of scientific and technical knowledge’s in an area EMC and protection of modern equipment from a dangerous action on them PEMI. Formulation of important for society scientific and technical problems and tasks, arising up in an area EMC and providing of the reliable functioning of modern equipment in power electromagnetic interference.

  17. Energy-efficient electrical drives in the education of professionals; Energieeffiziente elektrische Antriebe in der Ausbildung

    Energy Technology Data Exchange (ETDEWEB)

    Bachmann, R.

    2007-03-15

    This final report for the Swiss Federal Office of Energy (SFOE) discusses how the electricity consumption of drive systems can be reduced. Such electrical drive systems are responsible for approximately 45% of Switzerland's electricity consumption. The paper discusses how this amount could be reduced by 10-20% by employing more energy-efficient drive systems. The authors are of the opinion that, in future, this fact should be taken into account by professors and teachers in their courses at all levels of education for technicians and electrical engineers. The results of a survey made on the present situation are discussed. Teaching modules that are to help facilitate the integration of this subject in the educational curricula at various levels are looked at. The report is completed with a comprehensive appendix on teaching modules, documentation and check-lists from the University of Applied Sciences of North-western Switzerland.

  18. Kai Adolf Jensen, professor i almindelig patologi

    DEFF Research Database (Denmark)

    Høiby, Niels

    2016-01-01

    for the Bacillus Calmette-Guérin vaccine production and supervised many young scientists’ doctoral theses on the aspects of tuberculosis. He became internationally recognized, and he revealed an important scientific fraud in the laboratory of the Austrian professor Ernst Löwenstein (1878-1950), who claimed that he...

  19. String theorist takes over as Lucasian Professor

    Science.gov (United States)

    Banks, Michael

    2009-11-01

    String theorist Michael Green will be the next Lucasian Professor of Mathematics at Cambridge University. Green, 63, will succeed Stephen Hawking, who held the chair from 1980 before retiring last month at the age of 67 and taking up a distinguished research chair at the Perimeter Institute for Theoretical Physics in Canada (see above).

  20. Epistemology Shock: English Professors Confront Science

    Science.gov (United States)

    Barnard, Ian; Osborn, Jan

    2017-01-01

    This article raises questions and concerns regarding students from the sciences working with faculty in the humanities in interdisciplinary settings. It explores the experience of two English professors facing the privileging of "facts" and a science-based understanding of the world in their own classrooms. It poses both questions and…

  1. Understanding Asperger Syndrome: A Professor's Guide [DVD

    Science.gov (United States)

    Organization for Autism Research (NJ3), 2011

    2011-01-01

    College can be a trying time in any individual's life. For adults with Asperger Syndrome this experience can be overwhelming. This title in the new DVD series Asperger Syndrome and Adulthood focuses on educating professors, teaching assistants, and others on what it means to be a college student on the spectrum and how they might best be able to…

  2. Professor Brand Advocacy: Do Brand Relationships Matter?

    Science.gov (United States)

    Jillapalli, Ravi K.; Wilcox, James B.

    2010-01-01

    The trend among students to advocate their professors online continues to generate interest within marketing academia. Brand advocacy in products and services has played a vital role in marketing. However, no known research to date has embraced the idea of brand advocacy in marketing education. This research builds on the recent human brand…

  3. Forestry professors and students receive national recognition

    OpenAIRE

    Davis, Lynn

    2005-01-01

    Two Virginia Tech professors in the College of Natural Resources and the university's Society of American Foresters student chapter received awards for their accomplishments at the Society of American Foresters 2005 national convention held in Fort Worth, Texas, earlier this month.

  4. Two business professors receive Fulbright Scholar awards

    OpenAIRE

    Ho, Sookhan

    2005-01-01

    Virginia Tech Pamplin College of Business professors Larry French and Mahmood A. Khan have received Fulbright Scholar Awards to teach and conduct research abroad next year. Both faculty members teach in the MBA program at the university's Northern Virginia Center in metro Washington, D.C.

  5. The Supervisor Is Not the Professor

    Science.gov (United States)

    Johnson, G. Stewart; Shafer, Carl

    1970-01-01

    College educational exposure does not prepare the graduate for the human relations demands of teamwork in industry, and may not prepare the graduate for the relationship with his supervisor. Five major dimensions of difference for the student between his interaction with his professors and his new relationships with his supervisor are: degree of…

  6. "Dear Professor: I Hate You"--Anonymous

    Science.gov (United States)

    Bartlett, Thomas

    2009-01-01

    Flip through a stack of anonymous student evaluations of professors and the mild comments, even the compliments, tend to blend together. But often, hidden among them, is a dagger. Then there are the out-and-out insults. Students' comments can be more than simply mean. Sometimes student comments aren't cruel, just weird. In this article, some…

  7. Africa's New Crisis: A Dearth of Professors

    Science.gov (United States)

    Lindow, Megan

    2009-01-01

    With many professors approaching retirement. a shortage of qualified academics has reached crisis proportions at a number of African universities. The shortfall is a consequence of decades of neglect of African higher education, as donors and governments concentrated limited resources on primary and secondary schools, and young scholars who manage…

  8. Professor Jacques Cortes prantsuse keele lektoraadis

    Index Scriptorium Estoniae

    2000-01-01

    Juuni alguses külastas filoloogiateaduskonna romaani-germaani filoloogia osakonda Roueni ülikooli professor Jacques Cortes (Prantsusmaa). Ta korraldas 4. õa üliõpilastele prantsuse keele intensiivkursuse ja võttis vastu eksami ning kohtus prantsuse keele lektoraadi õppejõududega : [täistekst

  9. Microcomputing Competencies for Special Education Professors.

    Science.gov (United States)

    Blackhurst, A. Edward; And Others

    1987-01-01

    A list of microcomputing competencies associated with functions that special education professors typically perform was assessed by 148 special education faculty who use microcomputers. Word processing was rated as the single most useful competency, along with the category of providing instruction about microcomputer applications in special…

  10. Veterinary medicine professor receives national honor

    OpenAIRE

    Douglas, Jeffrey S.

    2005-01-01

    Marie-Suthers-McCabe, of Riner, Va., associate professor of small animal clinical sciences at the Virginia-Maryland Regional College of Veterinary Medicine, has been awarded the highest honor in the nation for work in the area of the "human/animal bond."

  11. CFA or CFP: A Guide for Professors

    Science.gov (United States)

    Moy, Ronald L.

    2011-01-01

    The CFA Institute and the CFP Board of Standards provide professional certifications in the field of finance. In this paper, I provide my experience with the CFA and CFP programs in order to give other professors some insight into the process of attaining the designations. I hope to provide answers to some of the questions that other faculty…

  12. Family Law and Family Studies: Professor's Views

    Science.gov (United States)

    Hicks, Mary W.; And Others

    1977-01-01

    The results of a survey of family studies faculty concerning the inclusion of family law topics in family studies courses are discussed. The professor's needs for training and resources in the area of family and the law are identified and recommendations for meeting these needs are suggested. (Author)

  13. Professor Attitudes and Beliefs about Teaching Evolution

    Science.gov (United States)

    Barnes, Maryann Elizabeth

    Teaching evolution has been shown to be a challenge for faculty, in both K-12 and postsecondary education. Many of these challenges stem from perceived conflicts not only between religion and evolution, but also faculty beliefs about religion, it's compatibility with evolutionary theory, and it's proper role in classroom curriculum. Studies suggest that if educators engage with students' religious beliefs and identity, this may help students have positive attitudes towards evolution. The aim of this study was to reveal attitudes and beliefs professors have about addressing religion and providing religious scientist role models to students when teaching evolution. 15 semi-structured interviews of tenured biology professors were conducted at a large Midwestern universiy regarding their beliefs, experiences, and strategies teaching evolution and particularly, their willingness to address religion in a class section on evolution. Following a qualitative analysis of transcripts, professors did not agree on whether or not it is their job to help students accept evolution (although the majority said it is not), nor did they agree on a definition of "acceptance of evolution". Professors are willing to engage in students' religious beliefs, if this would help their students accept evolution. Finally, professors perceived many challenges to engaging students' religious beliefs in a science classroom such as the appropriateness of the material for a science class, large class sizes, and time constraints. Given the results of this study, the author concludes that instructors must come to a consensus about their goals as biology educators as well as what "acceptance of evolution" means, before they can realistically apply the engagement of student's religious beliefs and identity as an educational strategy.

  14. Optics for engineers

    CERN Document Server

    DiMarzio, Charles A

    2011-01-01

    This book is an excellent resource for teaching any student or scientist who needs to use optical systems. I particularly like the addition of MATLAB scripts and functions. Highly recommended.-Professor James C. Wyant, Dean of College of Optical Sciences, University of ArizonaHis book is clear, concise and highly readable. This is an excellent text.-Professor Changhuei Yang, California Institute of TechnologyAt last, a book on optics that is written with the practising engineer in mind. I have been teaching optics to engineers for many years and have often longed for a text aimed at my student

  15. Proceedings of the Sixth International Conference on Management Science and Engineering Management : Focused on Electrical and Information Technology

    CERN Document Server

    Yasinzai, Masoom; Lev, Benjamin

    2013-01-01

    Welcome to the proceedings of the Sixth International Conference on Management Science and Engineering Management (ICMSEM2012) held from November 11 to 14, 2012 at Quaid-i-Azam University, Islamabad, Pakistan and supported by Sichuan University (Chengdu, China), Quaid-i-Azam University (Islamabad, Pakistan) and The National Natural Science Foundation of China. The International Conference on Management Science and Engineering Management is the annual conference organized by the International Society of Management Science and Engineering Management. The goals of the Conference are to foster international research collaborations in Management Science and Engineering Management as well as to provide a forum to present current research results. The papers are classified into 8 sections: Computer and Networks, Information Technology, Decision Support System, Industrial Engineering, Supply Chain Management, Project Management, Manufacturing and Ecological Engineering. The key issues of the sixth ICMSEM cover variou...

  16. Yuriko and Michael Renardy reappointed Class of 1950 Professors

    OpenAIRE

    Owczarski, Mark

    2010-01-01

    Yuriko and Michael Renardy, professors of mathematics in the College of Science at Virginia Tech, have been reappointed as the Virginia Tech Class of 1950 Professors by the Virginia Tech Board of Visitors.

  17. The use of mathematics and electric circuit simulator software in the learning process of wireless power transfer for electrical engineering students

    Science.gov (United States)

    Habibi, Muhammad Afnan; Fall, Cheikh; Setiawan, Eko; Hodaka, Ichijo; Wijono, Hasanah, Rini Nur

    2017-09-01

    Wireless Power Transfer (WPT) isa technique to deliver the electrical power from the source to the load without using wires or conductors. The physics of WPT is well known and basically learned as a course in high school. However, it is very recent that WPT is useful in practical situation: it should be able to transfer electric power in a significant efficiency. It means that WPT requires not much knowledge to university students but may attract students because of cutting edge technique of WPT. On the other hand, phenomena of WPT is invisible and sometimes difficult to imagine. The objective of this paper is to demonstrate the use of mathematics and an electric circuit simulator using MATHEMATICA software and LT-SPICE software in designing a WPT system application. It brings to a conclusion that the students as well the designer can take the benefit of the proposed method. By giving numerical values to circuit parameters, students acquires the power output and efficiency of WPT system. The average power output as well as the efficiency of the designed WPT which resonance frequency set on the system,leads it to produce high output power and better efficiency.

  18. Technician Career Opportunities in Engineering Technology.

    Science.gov (United States)

    Engineers' Council for Professional Development, New York, NY.

    Career opportunities for engineering technicians are available in the technologies relating to air conditioning, heating, and refrigeration, aviation and aerospace, building construction, chemical engineering, civil engineering, electrical engineering, electronics, industrial engineering, instrumentation, internal combustion engines, mechanical…

  19. Categorization of Quantum Mechanics Problems by Professors and Students

    Science.gov (United States)

    Lin, Shih-Yin; Singh, Chandralekha

    2010-01-01

    We discuss the categorization of 20 quantum mechanics problems by physics professors and undergraduate students from two honours-level quantum mechanics courses. Professors and students were asked to categorize the problems based upon similarity of solution. We also had individual discussions with professors who categorized the problems. Faculty…

  20. E-Mail from Professor Enhances Student Motivation and Attitudes

    Science.gov (United States)

    Legg, Angela M.; Wilson, Janie H.

    2009-01-01

    Traditionally, professors use the first day of class to build rapport. However, current technology allows professors to contact students prior to the first day of class. This study assessed how the receipt of a welcoming e-mail from a female professor 1 week before the first day of class affected student motivation and attitudes toward the…

  1. Connect and Thrive: Perspectives from a Newly Tenured Professor

    Science.gov (United States)

    Ciocchetti, Corey A.

    2011-01-01

    This essay encapsulates the author's perspective on how average professors can become highly effective professors. The author asserts that the secret rests in the ability to genuinely connect with students. Connecting really matters--even if it takes some personality adaptation and thrusts academics out of their comfort zones. Many professors fail…

  2. Anti-Fat Bias by Professors Teaching Physical Education Majors

    Science.gov (United States)

    Fontana, Fabio; Furtado, Ovande, Jr.; Mazzardo, Oldemar, Jr.; Hong, Deockki; de Campos, Wagner

    2017-01-01

    Anti-fat bias by professors in physical education departments may interfere with the training provided to pre-service teachers. The purpose of this study was to evaluate the attitudes of professors in physical education departments toward obese individuals. Professors from randomly selected institutions across all four US regions participated in…

  3. 26 CFR 509.115 - Visiting professors or teachers.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 19 2010-04-01 2010-04-01 false Visiting professors or teachers. 509.115...) REGULATIONS UNDER TAX CONVENTIONS SWITZERLAND General Income Tax § 509.115 Visiting professors or teachers. (a) General. Pursuant to Article XII of the convention, a professor or teacher, a nonresident alien who is a...

  4. Variables That Can Affect Student Ratings of Their Professors

    Science.gov (United States)

    Gotlieb, Jerry

    2013-01-01

    Attribution theory was applied to help predict the results of an experiment that examined the effects of three independent variables on students' ratings of their professors. The dependent variables were students' perceptions of whether the professor caused the students' grades and student satisfaction with their professor. The results suggest…

  5. Nuclear Electric Magnetohydrodynamic Propulsion for Submarine

    Science.gov (United States)

    1989-05-01

    SUBMITTED TO THE DEPARTMENT OF OCEAN ENGINEERING IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREES OF MASTER OF SCIENCE IN NAVAL ARCHITECTURE D TIC ...Title: Profesor of Naval Construction and Engineering Thesis reader: Meyer, John E. Title: Professor of Nuclear Engineering -3- ACKNOWLEDGEMENT I would

  6. The digital algorithm for fast detecting and identifying the asymmetry of voltages in three-phase electric grids of mechanical engineering facilities

    Science.gov (United States)

    Shonin, O. B.; Kryltcov, S. B.; Novozhilov, N. G.

    2017-02-01

    The paper considers a new technique for the fast method of extracting symmetrical components of unbalanced voltages caused by the faults in electric grids of mechanical engineering facilities. The proposed approach is based on the iterative algorithm that checks if the set of at least three voltage discrete measurements belongs to a specific ellipse trajectory of the voltage space vector. Using classification of unbalanced faults in the grid and results of decomposing the voltages into symmetrical components, the algorithm is capable to discriminate between one-phase, two-phase and three-phase voltage sags. The paper concludes that results of simulation in Simulink environment have proved the correctness of the proposed algorithm for detecting and identifying the unbalanced voltage sags in the electrical grid under condition that it is free from high order harmonics.

  7. Performance analysis of electric power group of 50 kVA with MWM engine adapted to Otto cycle, using natural gas

    Directory of Open Access Journals (Sweden)

    Fabrízio L. Figueiredo

    2014-02-01

    Full Text Available This paper presents the data of tests with an internal combustion engine MWM adapted to Otto cycle, coupled to an electric generator with a capacity of 50 kVA, using natural gas . It is presented the characteristics and efficiency of the set for the purpose of comparison with its future operation using synthesis gas produced by a gasifier (biomass gas, to evaluate the feasibility of applying the system in remote locations, where biomass is available and system for transmitting electricity from other generation systems hampered by distance. The performance of the assembly was monitored at 0, 25, 50, 75 and 100% of its power capacity presented in increasing order of load voltages 220, 220, 221, 221 and 222 volts and currents 0, 25, 50, 75 and 100 amperes respectively for the load of 0, 9,5, 19, 27,5 and 38 kW the latter being the maximum output developed by the group.

  8. ONCE AGAIN ABOUT DETERMINATION OF SAVING OF ENERGY FOR TRACTION DUE TO PARTIAL CUT–OFF OF TRACTION ENGINES OF ELECTRIC ROLLING STOCK

    Directory of Open Access Journals (Sweden)

    G. K. Getman

    2013-09-01

    Full Text Available Purpose. In general the well known methods for determination of energy saving due to the partial traction engines cut-off based on their comparison to efficiency coefficient or to the power of energy losses do not allow objective estimation of efficiency of these measures and in a number of cases result in erroneous results and errors. The search for new more advanced methods for determination of energy saving at the partial cut-off of the traction engines is needed. Methodology. The method of calculation determination of energy saving when partial cutting-off of the traction engines is offered. It is based on the use of rationality coefficient as the loading mode of the electric power consumption for the measuring instrument of transportation activity. Findings. Using the given mathematical expressions it is possible to determine the energy saving in both the relative and absolute values and set the terms (motion speed and route gradient, under which the energy saving will take place. Originality. The method of the task solving, which is based on the evaluation of energy consumption differences for the compared variants (not on the comparison of efficiency coefficient or differences of power of energy losses is offered. Practical value. The given methodology allows obtaining more exact conclusions in relation to the electric power consumption, as the comparison of energy losses power or the efficiency coefficient does not determine precisely the electric power consumption for traction. Therefore the conclusions based on the comparison of power of energy losses or efficiency coefficient can appear inexact.

  9. Electrically conductive poly-ɛ-caprolactone/polyethylene glycol/multi-wall carbon nanotube nanocomposite scaffolds coated with fibrin glue for myocardial tissue engineering

    Science.gov (United States)

    Mehdikhani, Mehdi; Ghaziof, Sharareh

    2018-01-01

    In this research, poly-ɛ-caprolactone (PCL), polyethylene glycol (PEG), multi-wall carbon nanotubes (MWCNTs), and nanocomposite scaffolds containing 0.5 and 1% (w/w) MWCNTs coated with fibrin glue (FG) were prepared via solvent casting and freeze-drying technique for cardiac tissue engineering. Scanning electron microscopy, transmission electron microscopy, Fourier transform-infrared spectroscopy, and X-ray diffraction were used to characterize the samples. Furthermore, mechanical properties, electrical conductivity, degradation, contact angle, and cytotoxicity of the samples were evaluated. Results showed the uniform distribution of the MWCNTs with some aggregates in the prepared nanocomposite scaffolds. The scaffolds containing 1% (w/w) MWCNTs with and without FG coating illustrated optimum modulus of elasticity, high electrical conductivity, and wettability compared with PCL/PEG and PCL/PEG/0.5%(w/w) MWCNTs' scaffolds. FG coating enhanced electrical conductivity and cell response, and increased wettability of the constructs. The prepared scaffolds were degraded significantly after 60 days of immersion in PBS. Meanwhile, the nanocomposite containing 1% (w/w) MWCNTs with FG coating (S3) showed proper spreading and viability of the myoblasts seeded on it after 1, 4, and 7 days of culture. The scaffold containing 1% (w/w) MWCNTs with FG coating demonstrated optimal properties including acceptable mechanical properties, proper wettability, high electrical conductivity, satisfactory degradation, and excellent myoblasts response to it.

  10. Spotlight on CERN : Professor Michel Spiro

    CERN Multimedia

    CERN video productions

    2011-01-01

    20 Member states throughout Europe. A geographical expansion underway. A worldwide, international collaboration and a scientific challenge on a scale second to none. In view of this complexity, how is CERN managed? This is the remit of the CERN council, which notably defines the strategic programmes, annual objectives, approves the annual budget and nominates the directorate. I am pleased to welcome Professor Michel Spiro, scientific director of the CNRS in France and CERN Council presdient since 2010. On today’s agenda: Expansion, innovation and communication. Hello and welcome Professor.. François et Stéphan are of course with me today to discuss such matters as antimatter, press and we will also be talking water and towers… I will say no more. It’s good to see you both ! And welcome to you all for this latest edition of Spotlight on CERN.

  11. Dictionary of electrical engineering. Power engineering, automation technology, measurement and control technology, mechatronics. German - English; Fachwoerterbuch Elektrotechnik. Energietechnik, Automatisierungstechnik, Mess-, Steuer- und Regelungstechnik, Mechatronik. Deutsch - Englisch

    Energy Technology Data Exchange (ETDEWEB)

    Heckler, H.

    2007-07-01

    This comprehensive dictionary contains more than 60,000 electrotechnical and engineering terms - used in textbooks, manuals, data sheets, whitepapers and international standards. British English and American English spelling differences are identified. Terms used in IEC standards of the International Electrotechnical Commission are marked, allowing the reader to have easy access to the multilingual glossary of the IEC. (orig.)

  12. Electric utility engineer`s FGD manual -- Volume 2: Major mechanical equipment; FGD proposal evaluations; Use of FGDPRISM in FGD system modification, proposal, evaluation, and design; FGD system case study. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-04

    Part 2 of this manual provides the electric utility engineer with detailed technical information on some of the major mechanical equipment used in the FGD system. The objectives of Part 2 are the following: to provide the electric utility engineer with information on equipment that may be unfamiliar to him, including ball mills, vacuum filters, and mist eliminators; and to identify the unique technique considerations imposed by an FGD system on more familiar electric utility equipment such as fans, gas dampers, piping, valves, and pumps. Part 3 provides an overview of the recommended procedures for evaluating proposals received from FGD system vendors. The objectives are to provide procedures for evaluating the technical aspects of proposals, and to provide procedures for determining the total costs of proposals considering both initial capital costs and annual operating and maintenance costs. The primary objective of Part 4 of this manual is to provide the utility engineer who has a special interest in the capabilities of FGDPRISM [Flue Gas Desulfurization PRocess Integration and Simulation Model] with more detailed discussions of its uses, requirements, and limitations. Part 5 is a case study in using this manual in the preparation of a purchase specification and in the evaluation of proposals received from vendors. The objectives are to demonstrate how the information contained in Parts 1 and 2 can be used to improve the technical content of an FGD system purchase specification; to demonstrate how the techniques presented in Part 3 can be used to evaluate proposals received in response to the purchase specification; and to illustrate how the FGDPRISM computer program can be used to establish design parameters for the specification and evaluate vendor designs.

  13. Perspectives of best Practices for Learning Gender-Inclusive Science: Influences of Extracurricular Science for Gifted Girls and Electrical Engineering for Women

    Science.gov (United States)

    Wood, Shaunda L.

    Gifted girls in elementary school must follow the set curriculum, but their choices of extracurricular activities may indicate future subject preferences. This study attempted to explore the perceptions of gifted girls regarding how the family, home, and school environments influenced their choices to take extracurricular science classes. A mixed methodology was adopted: qualitative, to understand the girls' perceptions of influence, and quantitative, to measure their attitudes toward science. Influential factors identified in this study highlight fun as occurring with the highest frequency and four emergent factors: doubt, traditional sex roles, boredom, and group work. In addition, findings from a focused case study of a graduate electrical engineer are interwoven with the girls' perspectives of science. The varying ages and experiences with science of the participants provide interesting views. This study adds knowledge to the field of science education, specifically on withingender differences of gifted girls and women in engineering.

  14. Generation of rotary vibrations in internal combustion engines with elastically coupled electric power systems; Erzeugung von verbrennungsmotorischen Drehschwingungen mit elastisch gekoppelten elektrischen Antrieben

    Energy Technology Data Exchange (ETDEWEB)

    Falkenstein, Jens Werner [Rostock Univ. (Germany). Inst. fuer Antriebstechnik und Mechatronik

    2004-07-01

    The design of motor car powertrains requires simulations as well as prototype tests. For the simulations, prototype parameters must be identified on test rigs, simulation results must be verified, and life tests must be carried out. This necessitates realistic and reproducible excitation of vibrations. Thee book describes the development and construction of a test rig which, with the aid of electric power systems, induces rotary vibrations like those which may occur in internal combustion engines due to gas forces and unbalanced mass forces. In combination with excess resonance, the test stand achieves high dynamics with average rotary momenta up to 600 Nm. The development process is documented, from test stand design with specially developed servo-engines to the control hardware to modelling, control element design, and commissioning. (orig.)

  15. Use of biogas for cogeneration of heat and electricity for local application: performance evaluation of an engine power generator and a sludge thermal dryer.

    Science.gov (United States)

    Lobato, L C S; Chernicharo, C A L; Pujatti, F J P; Martins, O M; Melo, G C B; Recio, A A R

    2013-01-01

    A small unit of cogeneration of energy and heat was tested at the Centre for Research and Training on Sanitation UFMG/COPASA - CePTS, located at the Arrudas Sewage Treatment Plant, in Belo Horizonte, Minas Gerais, Brazil. The unit consisted of an engine power generator adapted to run on biogas, a thermal dryer prototype and other peripherals (compressor, biogas storage tank, air blower, etc.). The heat from engine power generator exhaust gases was directed towards the thermal dryer prototype to dry the sludge and disinfect it. The results showed that the experimental apparatus is self-sufficient in electricity, even producing a surplus, available for other uses. The tests of drying and disinfection of sludge lasted 7 h, leading to an increase in solids content from 4 to 8% (50% reduction in sludge volume). Although the drying of sludge was not possible (only thickening was achieved), the disinfection process proved very effective, enabling the complete inactivation of helminth eggs.

  16. How the Timing of Climate Change Policy Affects Infrastructure Turnover in the Electricity Sector: Engineering, Economic and Policy Considerations

    Science.gov (United States)

    Izard, Catherine Finlay

    The electricity sector is responsible for producing 35% of US greenhouse gas (GHG) emissions. Estimates suggest that ideally, the electricity sector would be responsible for approximately 85% of emissions abatement associated with climate polices such as America's Clean Energy and Security Act (ACES). This is equivalent to ˜50% cumulative emissions reductions below projected cumulative business-as-usual (BAU) emissions. Achieving these levels of emissions reductions will require dramatic changes in the US electricity generating infrastructure: almost all of the fossil-generation fleet will need to be replaced with low-carbon sources and society is likely to have to maintain a high build rate of new capacity for decades. Unfortunately, the inertia in the electricity sector means that there may be physical constraints to the rate at which new electricity generating capacity can be built. Because the build rate of new electricity generating capacity may be limited, the timing of regulation is critical---the longer the U.S. waits to start reducing GHG emissions, the faster the turnover in the electricity sector must occur in order to meet the same target. There is a real, and thus far unexplored, possibility that the U.S. could delay climate change policy implementation for long enough that it becomes infeasible to attain the necessary rate of turnover in the electricity sector. This dissertation investigates the relationship between climate policy timing and infrastructure turnover in the electricity sector. The goal of the dissertation is to answer the question: How long can we wait before constraints on infrastructure turnover in the electricity sector make achieving our climate goals impossible? Using the Infrastructure Flow Assessment Model, which was developed in this work, this dissertation shows that delaying climate change policy increases average retirements rates by 200-400%, increases average construction rates by 25-85% and increases maximum construction

  17. 31 July 2014 - Professor M. Kastner

    CERN Multimedia

    Egli, Laurent

    2014-01-01

    MIT Faculty Member Donner Professor of Physics Massachusetts Institute of Technology United States of America, Prof. M. Kastner visiting the LHC tunnel at Point 5 with Beams Department M. Solfaroli Camillocci, LHC superconducting magnet assembly hall visit with L. Rossi and R. Principe, LHC Computing Grid Project presentation and computer centre visit with I. Bird and signing the guest book with CERN Director-General R. Heuer.

  18. [Homage to Professor Dr. Nicasio Etchepareborda].

    Science.gov (United States)

    1998-11-01

    During a solemn academic act, de Main Classroom of the Facultad de Odontologia de Buenos Aires was named after Prof. Dr. Nicasio Etchepareborda. He has been the first professor at the Escuela de Odontologia and its organizer, after having obtained his Dentistry degree at the Dental School of Paris, in 1882. The new school was founded in 1891, and its activities began the following year.

  19. Analysis of technical-economic requirements for the construction of a solar power plant on the roof of the business building of the Electrical Engineering Institute 'Nikola Tesla'

    Directory of Open Access Journals (Sweden)

    Grbić Maja

    2014-01-01

    Full Text Available This paper presents an analysis of the technical-economic requirements for the construction of a solar power plant on the roof of the business building of the Electrical Engineering Institute 'Nikola Tesla' in Belgrade. Calculation of solar irradiation is performed and the conceptual design of the disposition of solar panels on the roof of the building is shown as well as their connections to the inverters. Conditions for connecting the plant to the distribution network are checked and an economic analysis of the project is performed.

  20. In memory of Professor Paolo Talamucci

    Directory of Open Access Journals (Sweden)

    Cantiani M

    2010-05-01

    Full Text Available Paolo Talamucci, Full Professor of Range Management at the Università degli Studi in Florence from 1975 to 2001, passed away on 27th November 2009, after a brief and unrelenting illness. Professor Talamucci spent many long years in the field of research, in both Mediterranean and Alpine regions. His research, profoundly rooted in the territory he was studying, holistic in its approach and rigorously scientific, was characterized by a strong interdisciplinary element, seeking always to take into account the totality of the components of the ecosystem. Professor Talamucci was one of the first scholars of the pastoral system to highlight the problems related to the abandonment of traditional animal husbandry in mountainous zones and to look for ways to counteract the undesirable transformation of the landscape and the consequent loss of biodiversity. His curriculum and his numerous scientific publications bear testimony not only to the prestigious research institutes, world-wide, with which he was associated, but also to the important international dimension of his research.

  1. APOSENTADORIA: como professores vivenciam este momento?

    Directory of Open Access Journals (Sweden)

    Cristiane Nervis Conrado Machado

    2017-05-01

    Full Text Available O presente artigo buscou compreender as implicações que a aposentadoria causa na vida de professores, levando em conta o significado que a aposentadoria representa à estes, considerando os pontos de maior mudança após a aposentadoria, bem como os aspectos positivos e negativos causados pela aposentadoria na percepção dos sujeitos da pesquisa. Para tanto, foi realizada uma pesquisa qualitativa caracterizada como exploratória e descritiva com professores aposentados por mais de dois anos, com idade entre 58 e 66 anos, através de entrevistas individuais, com roteiros semiestruturados. A análise dos dados foi por meio da análise de conteúdo de Bardin (2011. Entre os principais resultados, destaca-se o significado de “liberdade” que a aposentadoria representa, a rotina como maior mudança e flexibilidade de horários dentre os pontos positivos e a falta dos alunos como aspecto negativo, contudo, pode-se perceber que a aposentadoria possibilitou e contribuiu para que os professores pudessem desfrutar de momentos de lazer, dedicando cuidado à família e realizando seus anseios e vontades.

  2. Analysis and Design of a Dish/Stirling System for Solar Electric Generation with a 2.7 kW Air-Cooled Engine

    Directory of Open Access Journals (Sweden)

    Beltrán-Chacón R.

    2012-01-01

    Full Text Available This paper presents a mathematical modeling, simulation and design of a solar power system of a parabolic dish with an air-cooled Stirling engine of 2.7 kW. The model used for the solar concentrator, the cavity and the Stirling engine were successfully validated against experimental data. Based on a parametric study, the design of the components of the engine is carried out. The study shows that as system capacity increases, the overall efficiency is limited by the power required by the fan, since the design of the cooler needs greater amounts of heat removal by increasing the air flow without affecting the internal conditions of the process (mass flow of working gas and internal dimensions of the same. The system was optimized and achieves an overall efficiency of solar to electric energy conversion of 26.7%. This study shows that the use of an air-cooled Stirling engine is potentially attractive for power generation at low capacities.

  3. Efficiency measurement and uncertainty discussion of an electric engine powered by a "self-breathing" and "self-humidified" proton exchange membrane fuel cell.

    Science.gov (United States)

    Schiavetti, Pierluigi; Del Prete, Zaccaria

    2007-08-01

    The efficiency of an automotive engine based on a "self-breathing" and "self-humidified" proton exchange membrane fuel cell stack (PEM FC) connected to a dc brushless electrical motor was measured under variable power load conditions. Experiments have been carried out on a small scale 150 W engine model. After determining the fuel cell static polarization curve and the time response to power steps, the system was driven to copy on the test bench a "standard urban load cycle" and its instantaneous efficiencies were measured at an acquisition rate of 5 Hz. The integral system efficiency over the entire urban load cycle, comprising the losses of the unavoidable auxiliary components of the engine, was then calculated. The fuel cell stack was operated mainly in "partial" dead-end mode, with a periodic anode flow channel purging, and one test was carried out in "pure" dead-end mode, with no anode channel purging. An uncertainty analysis of the efficiencies was carried out, taking into account either type A and type B evaluation methods, strengthening the discussion about the outcomes obtained for a system based on this novel simplified FC type. For our small scale engine we measured over the standard urban cycle, on the basis of the H(2) high heating value (HHV), a tank-to-wheel integral efficiency of (18.2+/-0.8)%, when the fuel cell was operated with periodic flow channel purging, and of (21.5+/-1.3)% in complete dead-end operation mode.

  4. The dish-Rankine SCSTPE program (Engineering Experiment no. 1). [systems engineering and economic analysis for a small community solar thermal electric system

    Science.gov (United States)

    Pons, R. L.; Grigsby, C. E.

    1980-01-01

    Activities planned for phase 2 Of the Small Community Solar Thermal Power Experiment (PFDR) program are summarized with emphasis on a dish-Rankine point focusing distributed receiver solar thermal electric system. Major design efforts include: (1) development of an advanced concept indirect-heated receiver;(2) development of hardware and software for a totally unmanned power plant control system; (3) implementation of a hybrid digital simulator which will validate plant operation prior to field testing; and (4) the acquisition of an efficient organic Rankine cycle power conversion unit. Preliminary performance analyses indicate that a mass-produced dish-Rankine PFDR system is potentially capable of producing electricity at a levelized busbar energy cost of 60 to 70 mills per KWh and with a capital cost of about $1300 per KW.

  5. Visit of Professor Shigehiko Hasumi. President of Tokyo University, Japan, Professor Kazuo Okamoto, Head of Graduate School of Mathematical Sciences, Professor Toshiteru Matsuura, Head of Graduate School of Arts and Sciences

    CERN Multimedia

    Patrice Loiez

    1999-01-01

    Visit of Professor Shigehiko Hasumi. President of Tokyo University, Japan, Professor Kazuo Okamoto, Head of Graduate School of Mathematical Sciences, Professor Toshiteru Matsuura, Head of Graduate School of Arts and Sciences

  6. Handbook of air pollution from internal combustion engines: pollutant formation and control

    National Research Council Canada - National Science Library

    Sher, Eran

    1998-01-01

    ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix PART I OVERViEW . 1. Motor Vehicle Emissions Control: Achievements, Future Prospects Past 3 John B. Heywood Sun Jae Professor of Mechanical Engineering...

  7. From Fourier optics to integrative engineering

    Science.gov (United States)

    Jannson, Tomasz; Kostrzewski, Andrew

    2011-10-01

    In this paper we present technical evolution at Physical Optics Corporation (POC), from Fourier Optics, inspired by Professor Joseph Goodman's classic book: Introduction to Fourier Optics, to recent directions at POC, related to socalled "Integrative Engineering."

  8. Stochastic reliability and maintenance modeling essays in honor of Professor Shunji Osaki on his 70th birthday

    CERN Document Server

    Nakagawa, Toshio

    2013-01-01

    In honor of the work of Professor Shunji Osaki, Stochastic Reliability and Maintenance Modeling provides a comprehensive study of the legacy of and ongoing research in stochastic reliability and maintenance modeling. Including associated application areas such as dependable computing, performance evaluation, software engineering, communication engineering, distinguished researchers review and build on the contributions over the last four decades by Professor Shunji Osaki. Fundamental yet significant research results are presented and discussed clearly alongside new ideas and topics on stochastic reliability and maintenance modeling to inspire future research. Across 15 chapters readers gain the knowledge and understanding to apply reliability and maintenance theory to computer and communication systems. Stochastic Reliability and Maintenance Modeling is ideal for graduate students and researchers in reliability engineering, and workers, managers and engineers engaged in computer, maintenance and management wo...

  9. Limited output transcranial electrical stimulation (LOTES-2017): Engineering principles, regulatory statutes, and industry standards for wellness, over-the-counter, or prescription devices with low risk.

    Science.gov (United States)

    Bikson, Marom; Paneri, Bhaskar; Mourdoukoutas, Andoni; Esmaeilpour, Zeinab; Badran, Bashar W; Azzam, Robin; Adair, Devin; Datta, Abhishek; Fang, Xiao Hui; Wingeier, Brett; Chao, Daniel; Alonso-Alonso, Miguel; Lee, Kiwon; Knotkova, Helena; Woods, Adam J; Hagedorn, David; Jeffery, Doug; Giordano, James; Tyler, William J

    We present device standards for low-power non-invasive electrical brain stimulation devices classified as limited output transcranial electrical stimulation (tES). Emerging applications of limited output tES to modulate brain function span techniques to stimulate brain or nerve structures, including transcranial direct current stimulation (tDCS), transcranial alternating current stimulation (tACS), and transcranial pulsed current stimulation (tPCS), have engendered discussion on how access to technology should be regulated. In regards to legal regulations and manufacturing standards for comparable technologies, a comprehensive framework already exists, including quality systems (QS), risk management, and (inter)national electrotechnical standards (IEC). In Part 1, relevant statutes are described for medical and wellness application. While agencies overseeing medical devices have broad jurisdiction, enforcement typically focuses on those devices with medical claims or posing significant risk. Consumer protections regarding responsible marketing and manufacture apply regardless. In Part 2 of this paper, we classify the electrical output performance of devices cleared by the United States Food and Drug Administration (FDA) including over-the-counter (OTC) and prescription electrostimulation devices, devices available for therapeutic or cosmetic purposes, and devices indicated for stimulation of the body or head. Examples include iontophoresis devices, powered muscle stimulators (PMS), cranial electrotherapy stimulation (CES), and transcutaneous electrical nerve stimulation (TENS) devices. Spanning over 13 FDA product codes, more than 1200 electrical stimulators have been cleared for marketing since 1977. The output characteristics of conventional tDCS, tACS, and tPCS techniques are well below those of most FDA cleared devices, including devices that are available OTC and those intended for stimulation on the head. This engineering analysis demonstrates that with

  10. Comparison between internal combustion engines and simulated electrical propulsion of taxis; Vergleich zwischen verbrennungsmotorischem und simuliertem elektrischen Antrieb von Taxis

    Energy Technology Data Exchange (ETDEWEB)

    Wallner, Stefan [Stefan Wallner Energietechnik, Unterhaching (Germany); Thym, Jochen

    2011-03-15

    The term 'triumphal procession of electromobility' produces an enormous expectation at the end users side, but intensive development work has still to be done. The transition from today's vehicles towards electric propulsion is not to be expected to take place overnight but will start with slot applications. Energietechnik Wallner has analysed the potential of taxis. (orig.)

  11. How did the General Purpose Technology Electricity contribute to the Second Industrial Revolution (II): The Communication Engines

    NARCIS (Netherlands)

    van der Kooij, B.J.G.

    2017-01-01

    The concept of the General Purpose Technology (GPT) of the late 1990s is a culmination of many evolutionairy views in innovation-thinking. By definition the GPT considers the technical, social, and economic effects of meta-technologies like steam-technology and electric technology. This paper uses

  12. Control Performance of General Electric Fuel and Torque Regulator Operating on T31-3 Turbine-Propeller Engine in Sea-Level Test Stand

    Science.gov (United States)

    Oppenheimer, Frank L.; Lazar, James

    1951-01-01

    A .General Electric fuel and torque regulator was tested in conjunction with a T31-3 turbine-propeller engine in the sea-level static test stand at the NACA Lewis laboratory. The engine and control were operated over the entire speed range: 11,000 rpm, nominal flight idle, to 13,000 rpm, full power. Steady-state and transient data were recorded and are presented with a description of the four control loops being used in the system. Results of this investigation indicated that single-lever control operation was satisfactory under conditions of test. Transient data presented showed that turbine-outlet temperature did overshoot maximum operating value on acceleration but that the time duration of overshoot did not exceed approximately 1 second. This temperature limiting resulted from a control on fuel flow as a function of engine speed. Speed and torque first reached their desired values 0.4 second from the time of change in power-setting lever position. Maximum speed overshoot was 3 percent.

  13. Religiosidade em alunos e professores portugueses

    OpenAIRE

    Ferreira, Ana Maria Mendes dos Santos Veríssimo

    2005-01-01

    Tese de Doutoramento em Ciências da Educação na especialidade de Educação Intercultural apresentada à Universidade Aberta Esta tese pretende analisar a religiosidade em alunos e professores, sendo a religiosidade entendida como o grau de ligação ou aceitação que cada indivíduo tem face à instituição religiosa (Alston, 1875) e à forma como põe em prática as crenças e os rituais (Shafranske e Malony, 1990). Para medir a religiosidade foram utilizados diversos instrumentos – a escala de Atitu...

  14. Professor Stewart's hoard of mathematical treasures

    CERN Document Server

    Stewart, Ian

    2010-01-01

    Ian Stewart, author of the bestselling Professor Stewart's Cabinet of Mathematical Curiosities, presents a new and magical mix of games, puzzles, paradoxes, brainteasers, and riddles. He mingles these with forays into ancient and modern mathematical thought, appallingly hilarious mathematical jokes, and enquiries into the great mathematical challenges of the present and past. Amongst a host of arcane and astonishing facts about every kind of number from irrational or imaginary to complex or cuneiform, we find out: how to organise chaos; how matter balances anti-matter; how to turn a sphere i

  15. Boodskap van Professor Dr. J. Waterink

    Directory of Open Access Journals (Sweden)

    J. Waterink

    1955-03-01

    Full Text Available Boodskap van Professor Dr. J. Waterinkter gelegendheid van die verlening aan hem van de graad Doctor Educationis, honoris causa, door de Universiteit voor Christelijk Hoger Onderwijs te Potchefstroom op Zaterdag, 26 Maart 1955, en op die dag voorgelezen door de heer Jan van den Berg, Buitengewoon en Gevolmachtigd Ambassadeur van Hare Mi iesteit de Koningin der Nederlanden. Mijnheer, de Kanselier, Mijnheer de Voorzitter van de Raad, Mijnheer deVice-Kanselier en Rector, overige Heren ambtsdragers, en gij alien,die herwaarts kwaanit ter gelegenheid van deze Gradendag,zeer geachte en zeer gewenste toehoorders.

  16. Electrical installation calculations advanced

    CERN Document Server

    Kitcher, Christopher

    2013-01-01

    All the essential calculations required for advanced electrical installation workThe Electrical Installation Calculations series has proved an invaluable reference for over forty years, for both apprentices and professional electrical installation engineers alike. The book provides a step-by-step guide to the successful application of electrical installation calculations required in day-to-day electrical engineering practiceA step-by-step guide to everyday calculations used on the job An essential aid to the City & Guilds certificates at Levels 2 and 3For apprentices and electrical installatio

  17. A Pilot Study of the Effectiveness of Augmented Reality to Enhance the Use of Remote Labs in Electrical Engineering Education

    Science.gov (United States)

    Borrero, A. Mejias; Marquez, J. M. Andujar

    2012-01-01

    Lab practices are an essential part of teaching in Engineering. However, traditional laboratory lessons developed in classroom labs (CL) must be adapted to teaching and learning strategies that go far beyond the common concept of e-learning, in the sense that completely virtualized distance education disconnects teachers and students from the real…

  18. After the Workshop: A Case Study of Post-Workshop Implementation of Active Learning in an Electrical Engineering Course

    Science.gov (United States)

    Shekhar, Prateek; Maura Borrego

    2017-01-01

    Engineering education research has empirically validated the effectiveness of active learning over traditional instructional methods. However, the dissemination of education research into instructional practice has been slow. Faculty workshops for current and future instructors offer a solution to promote the widespread adoption of active learning…

  19. Developing Mentoring Relationships to Support the Careers of Women in Electrical Engineering and Computer Technologies. An Analysis on Mentors' Competencies

    Science.gov (United States)

    Pisimisi, S. S.; Ioannides, M. G.

    2005-01-01

    Only a low percent of women follow studies and develop careers in the field of engineering and computer technologies (E/CT). An initiative for motivating and supporting young women towards future educational paths and careers in this field was undertaken in the framework of a European thematic network with the involvement of universities from…

  20. Accreditation proposal for control systems in electrical engineering for 6th level in European Qualification Framework (EQF)

    DEFF Research Database (Denmark)

    Tsirigotis, Georgios; Friesel, Anna

    2013-01-01

    The progress of science and technology emphasizes the connection between different domains and disciplines. The technology development and changing demands of the labour market require upgrading and renewing of learning outcomes in higher education, especially in engineering fields. The Life Long...