bluuebunny/crossref_metadata_2025_split huggingface dataset:
NSF/IEEE CAEME center: An exciting opportunity to align electromagnetic education with the nineties
Authors: Iskander Magdy F. 
Published: April 2014

AbstractThe National Science Foundation/Institute of Electrical and Electronic Engineers (NSF/IEEE) Center for Computer Applications in Electromagnetic (EM) Education (CAEME) was funded in early 1990 by the National Science Foundation to stimulate and accelerate the use of computers and software tools in EM education. The Center is managed by the Executive Office of IEEE on behalf of the Antennas and Propagation Society. This organizational structure provided avenues for broad participation by universities, professional societies, and corporations in the Center's activities. In two years of operation, CAEME has organized several workshops and special sessions in international meetings, published its first software book, prepared a lesson on “Electromagnetic Waves” using interactive video, and raised over $ 130,000 from university membership, participating societies, and corporate sponsors. This article summarizes CAEME activities, outlines its organizational structure, and briefly describes the contents of its first software book. Future developments are discussed and avenues for participation are outlined.
Visualization, simulation, and computing: New tools for learning, new paradigm for teaching
Authors: Cole Rodney , Brune Curtis 
Published: April 2014

AbstractIn this article we explore the role computing can play in an electromagnetics class. Our aim is not to provide answers, but to open a discussion on several topics related to the use of the computer as a learning aid. We provide some examples of what we have done in an introductory electricity and magnetism class using a program called SilverHammer that maps electric and magnetic fields for point charges. However, the point of this article is not to say that this is the only way computers should be used, but rather to point out that we really have only scratched the surface of a very versatile tool. Those who are presently working in this area are the pioneers, and will see the use of the computer go from these first applications to being an indispensable medium for learning. The computer may well let us create virtual scenarios that allow us to explore ideas and relationships with a heretofore unattained proficiency.
Interactive video: Innovative episodes for enhancing education
Authors: Bailey Harold J. , Thornton Nancy E. 
Published: April 2014

AbstractThis article provides information about the actual and potential uses of interactive video in instruction in an effort to motivate educators to consider using this technology to improve teaching. The authors (1) describe the continuing evolution of computer‐based educational tools; (2) examine instances when an interactive videodisc provides viable instructional solutions to otherwise very difficult or impossible tasks; (3) discuss several models for delivering instruction to accommodate different learning styles and teaching methods; and (4) provide a framework for designing lessons systematically based on proven methods.
A multimedia laboratory
Authors: El‐Sharkawy Mohamed 
Published: April 2014

AbstractThis paper describes multimedia work stations used in an undergraduate electrical engineering laboratory. The work stations are DSP96000 IBM PC‐based and are used for digital signal processing (DSP), speech processing, image processing, and graphics applications. The experiments conducted in two undergraduate courses are presented. The first is a one‐semester, three‐credit‐hour digital signal processing course and the second is a one‐semester, three‐credit‐hour senior design course.
Interactive analysis of propagation in optical fibers
Authors: Aicklen Gregory H. , Tamil Lakshman S. 
Published: April 2014

AbstractWe have developed a set of computer codes that compute the propagation constants and field patterns for the propagating modes of cylindrical optical fibers. From a simple set of finite difference equations, solutions of the scalar Helmholtz wave‐equation may be computed across a range of normalized frequencies to generate curves describing the dispersion characteristics of the fiber. Accurate cutoff frequencies for any mode can also be computed. We designed the computer codes around α‐index profiles since these profiles have been extensively covered in the literature, but our system also supports arbitrary profiles within the limits of the “small index gradient” and “weakly guiding” approximations. The computer codes are accurate and fast. They may be used interactively to explore dispersion in optical fibers and the effects of finite cladding width on dispersion.
Radio‐wave propagation and hypercard: A helpful link
Authors: Crampagne Raymond , Hélier Marc , Tabbara Walid 
Published: April 2014

AbstractAn educational software developed for an introduction to radio‐wave propagation is presented. Designed based on the model of a classical radio or microwave link, the software is based on the authoring system HyperCard and makes use of the animation capabilities provided by QuickTime. Tested in the frame of a continuing education program and attended by technicians and engineers involved in the practical aspects of propagation, it is a helpful tool for both the teacher and the student.
A new educational packet for passive and active filter design
Authors: Ruiz J. , Aramendi E. , Ubierna A. 
Published: April 2014

AbstractA new software package for the design, analysis, and simulation of passive and active filters in cascade is presented. This article is mainly directed to engineering education. The software can also be used to aid in the filter design needed in industry. The main characteristic of this new software is based on several proposed alternatives in the design of passive filters.
Educational use of a microwave electromagnetic analysis of 3‐D planar structures
Authors: Rautio James C. 
Published: April 2014

AbstractThe use of an electromagnetic analysis of 3‐D planar structures is described with respect to the educational requirements of students from the college freshman level through the graduate level. The analysis is intended primarily for microwave use; however, there is also significant potential interest from the student of high speed digital design. The analysis is used for passive planar circuits with any number of layers. The third dimension is represented by vias. A mature graphical user interface is provided allowing rapid capture of structure geometry, color visualization, and animation of the resulting current distributions. The software is also explicitly designed to work in conjunction with popular circuit theory based microwave software and with SPICE.
Prototype expert system trouble‐shooter for the ANEX structural engineering teaching laboratory
Authors: Behr Richard A. , Benjamin Colin O. , Mirza Azam A. 
Published: April 2014

AbstractThis article describes the design and evaluation of a knowledge‐based expert system, called “TROUBLE‐SHOOTER,” developed for use in the newly developed “ANEX” undergraduate structural engineering teaching laboratory at the University of Missouri‐Rolla. ANEX is a portable, computer‐assisted mini‐laboratory that students use interactively to investigate correlations between computerized structural analyses and physical experiments performed on small‐scale model structures. TROUBLE‐SHOOTER was developed using LEVEL5 OBJECT® for Microsoft® Windows™ expert system shell. It is intended to act as a trouble‐shooter for various analytical and/or experimental problems that students could encounter during typical ANEX sessions.An extensive three‐phase evaluation of the prototype expert system was performed, including an in‐house technical evaluation using 36 ANEX session test cases, a subjective evaluation by 16 civil engineering undergraduate students, and a controlled empirical evaluation to compare the prototype's speed and accuracy of advice with those provided by three experienced ANEX laboratory teaching assistants. Results of the evaluations indicated that the prototype expert system was well received by students; it was a competent trouble‐shooter and it provided advice quickly. Statistical results of the empirical evaluation revealed that the prototype expert system was significantly more accurate than were experienced teaching assistants in trouble‐shooting typical ANEX sessions. The prototype expert system was especially adept at handling ANEX test cases that were burdened with multiple analytical and/or experimental errors.
CIG: A calorically imperfect compressible flow software element
Authors: Hodge B. K. , Koenig Keith 
Published: April 2014

AbstractA compressible flow utility software element, CIG, for calorically imperfect gas flows is reviewed. CIG makes possible the routine computation of one‐dimensional isentropic flow, normal shock waves, and Prandtl‐Meyer processes for calorically imperfect gases. Details of the formulation, discussions of the numeric procedures, and examples of applications are provided. CIG is a useful software element both for introducing students in a first compressible flow course to the effects of the calorically perfect gas assumption and for providing more advanced students with useful applications software for calorically imperfect gas flows.
Solid modeling: A new approach to freshman graphics
Authors: Marlor Sheryl Sorby 
Published: April 2014

AbstractA new course in computer aided drafting and design at the freshman and sophomore level is currently being offered at Michigan Technological University (MTU). The course is interdisciplinary in nature, with example problems taken from several engineering fields. This article discusses the course and the need for such a course in engineering education. Grading procedures and comments describing students' reactions to the course are also discussed.
Data acquisition tutor and programming interface
Authors: Guirguis Shawkat K. 
Published: April 2014

AbstractIn this article a tutoring system is presented to act as a platform for research students to study data acquisition. In addition, it could be used to program and operate an existing hardware setup. The hardware consists of a number of sensors attached to a programmable data logger, and collected data are transferred to a PC via a pair of short‐haul modems. The tutor exhibits the flexibility required to meet different needs of research students in information technology and environment‐related studies. In addition, it has the capability to act as a user‐friendly interface able to operate complex setups.
Enhancement of aerodynamics and flight dynamics instruction with interactive computer visualizations
Authors: Higuchi Hiroshi 
Published: April 2014

AbstractDesktop (Macintosh) computers with multimedia capabilities have been incorporated into the aerospace engineering curriculum—in particular, in the laboratory and core courses on aerodynamics and flight dynamics. Through interactive simulation, visual presentation, and image and motion analysis techniques at different levels of complexity, the enhancement of classroom materials has been achieved to further students' understanding of the underlying principles.
TLINE: Software for sinusoidal steady‐state analysis of transmission lines
Authors: Iskander M. F. , Jensen E. 
Published: April 2014

AbstractThis article describes the use of the software package TLINE, which includes three programs for the sinusoidal steady‐state analysis of transmission lines. The first program provides analysis of the tandem connection of several transmission lines with the possibility of including PI, T, or L lumped‐element discontinuity junctions between the transmission lines. The other two programs are related to analysis of impedance matching using single and double stubs. All analysis procedures are graphically displayed on Smith charts. Output files that include numerical values of input impedances, values of time‐average powers, and reflection coefficients at various sections of a tandem transmission line system are included. The TLINE software package is used to train students on the use of the Smith chart and also to help in the teaching and demonstration of various transmission line and impedance‐matching concepts.
Teaching technique for internal forced convection flows through tubes cooled or heated by external natural convection. I. Horizontal orientation
Authors: Campo Antonio , Lacoa Ulises 
Published: April 2014

AbstractThis report is concerned with a distinct instructional technique that facilitates the teaching of laminar forced convection flow through a horizontal tube exposed to external natural convection. A simple one‐dimensional lumped‐based formulation enabled the determination of the mean bulk and wall temperature distributions of the internal fluid flow as well as the total rate of heat transfer between two axial stations in the region of thermal development. Streamwise‐mean values for the internal and circumferential‐mean values for the external Nusselt numbers have been taken from standard correlations reported in undergraduate textbooks on heat transfer, leading to the immediate calculation of a mean, equivalent Nusselt number, which serves to regulate the thermal interaction between the two fluid streams. Representative results for a complete combination of internal and external fluids, expressed in terms of their respective thermal conductivity ratios, are discussed at length. The thermal quantities were computed with a pocket‐size calculator and compared favorably with those based on a more general and rigorous two‐dimensional differential formulation. The latter was utilized as a baseline solution, and inevitably required a finite‐difference procedure on a personal computer.
Effect of atmospheric phenomena on satellite communications
Authors: Anitzine I. Fernández , Almazán R. Ibeas 
Published: April 2014

AbstractIn this article we describe the development of a C++ program for Windows designed to aid the setting up of a VSAT communications network. The network's purpose is to perform the relevant radio link calculations, taking into consideration aspects such as attenuation by atmospheric gases, clouds, rain, and cross polarization.
The universal transformation matrix: Revealing the relationships among different graphical projection methods
Authors: Pas Eric I. , Vesilind P. Aarne 
Published: April 2014

AbstractThis article discusses the relationships among the different graphical projection techniques used by engineers and architects. These relationships are examined in the context of the transformation matrices that are employed to generate such projections on the computer. The report shows that the transformations that produce parallel (isometric and orthographic) and perspective projections can be derived as special cases of a transformation matrix that produces a three‐point perspective view. For this reason, the latter transformation matrix is referred to here as the “universal transformation matrix.” A better understanding of the different projection techniques, and the relationships among them, emerges from the recognition that all parallel and perspective transformations may be written as special cases of a single, general transformation matrix.
Classical control theory applied to potentially chaotic systems
Authors: Brogan William L. 
Published: April 2014

AbstractSome nonlinear systems of order three or higher become chaotic for certain parameter values and initial conditions. Interesting examples have been discussed in recent years, using sophisticated mathematical analysis and/or simulation. This article presents a simple method of predicting if chaos is possible and under what conditions, using classical control theory tools such as Nyquist's stability theorem and describing functions. The method is demonstrated using several examples.
Development of engineering courseware for university undergraduate teaching using computer animation
Authors: Tan F.‐L. , Fok S.‐C. 
Published: April 2014

AbstractComputer animation on personal computers (PC) is becoming increasingly popular as an educational teaching aid. With the increasing CPU power and high‐resolution graphics of PC, and the rapid evolution of animation softwares, engineering courses can be developed on the PC using computer animation. Many engineering systems and processes in the engineering courses can be animated to enhance learning by university undergraduates. These animation projects could be developed into engineering courseware on certain subjects or topics for effective teaching in classrooms, at home, or as computer‐aided laboratory lessons. Several types of animation software are introduced in this article.
Fortran 90 and the direct calculation of radiation view factors
Authors: Ribando Robert J. , Shi Qingping 
Published: April 2014

AbstractThe recent introduction of Fortran 90, along with constant increases in the speed of desktop personal computers, makes direct integration an extremely viable means of computing radiation view factors. Using the new intrinsic functions and simplified array operations which are part of the Fortran 90 standard, an algorithm based on discretization of the two surfaces can be implemented in fewer than a hundred lines of code and run in only a few seconds on a typical personal computer. The basics of such an algorithm for arbitrarily oriented flat parallelograms will be reviewed in this brief note.
Computerized nichols' chart for enhancing control design
Authors: Vibet C. 
Published: April 2014

AbstractThis article presents a versatile way to design Nichols' charts on small computers. First, this control problem is formulated in terms of open‐loop and closed‐loop transfer functions. Next, the plotting equations are solved by means of the Gnuplot version 3.0 program. When needed, the printing process is realized via an EMTEX postscript output provided by this program.
Computer solution of electrostatics problems using schwarz‐christoffel mapping technique
Authors: Oloomi Hossein M. , Badii Vahid 
Published: April 2014

AbstractIn this article we discuss the suitability of using a new MATLAB toolbox for teaching several undergraduate engineering courses. This toolbox, which is based on the Schwarz—Christoffel transformation of the complex variable theory, numerically solves the conformal mapping of many complex domains to the upper half‐plane. The toolbox allows a computer solution to many complex problems in areas such as electromagnetics and fluid mechanics. It is the purpose of this article to show the usefulness of this toolbox in introducing these advanced topics to the undergraduate students.
Introductory approach for variational methods
Authors: Gibson Andrew A. P. , Dillon Bernice M. 
Published: April 2014

AbstractA variational property of lumped element electrical circuits can be conveniently used to introduce the variational solution of boundary value problems in electrical engineering. In the case of electrical circuits, the Euler equation is Kirchhoff's current or voltage law. Easily solvable, low‐order problems with graphic illustrations are generated without difficulty.
Development and application of MCAL tools for marine radar instruction
Authors: Guirguis S. , Korany E. , Abdel‐Bary A. 
Published: April 2014

AbstractIn this article a multimedia computer‐assisted learning (MCAL) system is presented. The major objective of this work was to investigate the potential of using such systems as tools for transferring instructional course information through various types of computer media as opposed to the classic CAL systems. The philosophy and techniques employed to design the system are investigated. Usage of the implemented system and its merits have been illustrated through its application to teach engineering students and technicians the theory and concepts of marine radar. System design, implementation, test, and revision phases are presented and discussed.
N‐Terminal Modification of VEGF‐A C Terminus‐Derived Peptides Delineates Structural Features Involved in Neuropilin‐1 Binding and Functional Activity
Authors: Jia Haiyan , Aqil Rehan , Cheng Lili , Chapman Chris , Shaikh Shaheda , Jarvis Ashley , Chan A. W. Edith , Hartzoulakis Basil , Evans Ian M. , Frolov Antonina , Martin John , Frankel Paul , Djordevic Snezana , Zachary Ian C. , Selwood David L. 
Published: April 2014

AbstractThe interaction between VEGF‐A and its neuropilin (NRP) receptors mediates a number of important biological effects. NRP1 and the related molecule NRP2 are widely expressed on multiple tumour types and throughout the tumour vasculature, and are emerging as critical molecules required for the progression of angiogenic diseases. Given the increasing evidence supporting a role for NRP1 in tumour development, there is growing interest in developing inhibitors of NRP1 interactions with VEGF and its other ligands. In order to probe the interaction we synthesised a number of exon 7‐ and 8‐derived bicyclic peptides with N‐terminal lipophilic groups and found a simple N‐octanoyl derivative (EG00086) to be the most potent and functionally active. Detailed modelling studies indicated that new intramolecular hydrogen bonds were formed, stabilising the structure and possibly contributing to the potency. Removal of a salt bridge between D142 and R164 implicated in VEGF‐A binding to neuropilin‐1 had a minor effect on potency. Isothermal calorimetry was used to assess binding of EG00086 to NRP1 and NRP2, and the stability of the peptide in serum and in vivo was investigated. EG00086 is a potent blocker of VEGF‐promoted cellular adhesion to extracellular matrices, and phosphorylation of p130Cas contributes to this effect.
8‐Cyclopropyl‐2′‐Deoxyguanosine: A Hole Trap for DNA‐Mediated Charge Transport
Authors: Wong Jiun Ru , Shao Fangwei 
Published: April 2014

AbstractDNA duplexes containing 8‐cyclopropyl‐2′‐deoxyguanosine (8CPG) were synthesized to investigate the effect of the C8‐modified deoxyguanosine as a kinetic trap for transient hole occupancy on guanines during DNA‐mediated hole transport (HT). Thermal denaturation and CD spectra show that DNA duplexes containing 8CPG are able to form stable B‐form duplexes. Photoirradiation of terminal tethered anthraquinone can induce oxidative decomposition of 8CPG through DNA HT along adenine tracts with lengths of up to 4.8 nm. Shallow and periodic distance dependence was observed in a long adenine tract with intervening guanines. The efficient charge transport indicates that 8CPG can electronically couple well with a DNA bridge and form HT‐active conformational domains to facilitate transient hole delocalization over an adenine tract.
Expanding the Binding Envelope of CYP51 Inhibitors Targeting Trypanosoma cruzi with 4‐Aminopyridyl‐Based Sulfonamide Derivatives
Authors: Vieira Debora F. , Choi Jun Yong , Roush William R. , Podust Larissa M. 
Published: April 2014

AbstractChagas disease is a chronic infection caused by the protozoan parasite Trypanosoma cruzi, manifested in progressive cardiomyopathy and/or gastrointestinal dysfunction. Therapeutic options to prevent or treat Chagas disease are limited. CYP51, the enzyme key to the biosynthesis of eukaryotic membrane sterols, is a validated drug target in both fungi and T. cruzi. Sulfonamide derivatives of 4‐aminopyridyl‐based inhibitors of T. cruzi CYP51 (TcCYP51), including the sub‐nanomolar compound 3, have molecular structures distinct from other validated CYP51 inhibitors. They augment the biologically relevant chemical space of molecules targeting TcCYP51. In a 2.08 Å X‐ray structure, TcCYP51 is in a conformation that has been influenced by compound 3 and is distinct from the previously characterized ground‐state conformation of CYP51 drug–target complexes. That the binding site was modulated in response to an incoming inhibitor for the first time characterizes TcCYP51 as a flexible target rather than a rigid template.