bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Use of Silyl Ketene Acetals and Enol Ethers in the Catalytic Enantioselective Alkylative Ring Opening of Oxa/Aza Bicyclic Alkenes
Authors: Zhang Lei , Le Christine M. , Lautens Mark 
Published: April 2014

AbstractSilyl ketene acetals and enol ethers are employed as reactive and functional group tolerant nucleophiles in the enantioselective rhodium‐catalyzed alkylative ring opening of a diverse class of oxa/azabicyclic alkenes. This method provides access to enantioenriched dihydronaphthalene and cyclohexene scaffolds, which have the potential to be derivatized toward core motifs of naphthoquinone and sesquiterpene natural products.
A New Golden Age for Donor–Acceptor Cyclopropanes
Authors: Schneider Tobias F. , Kaschel Johannes , Werz Daniel B. 
Published: April 2014

AbstractThe effective use of ring strain has been applied to considerable advantage for the construction of complex systems. The focus here is directed towards cyclopropanes as building blocks for organic synthesis. Although thermodynamics should take the side of synthetic chemists, only a specific substitution pattern at the cyclopropane ring allows for particularly mild, efficient, and selective transformations. The required decrease in the activation barrier is achieved by the combined effects of vicinal electron‐donating and electron‐accepting moieties. This Review highlights the appropriate tools for successfully employing donor–acceptor cyclopropanes in ring‐opening reactions, cycloadditions, and rearrangements.
A Multidisciplinary Approach to Medieval and Early Modern Land Use: a Case Study from Southeastern Austria
Authors: Fazioli K. Patrick 
Published: April 2014

ABSTRACTThis paper presents an integrated multimethod approach to the prospection and reconstruction of medieval and early modern rural landscapes in southeastern Austria (ca. 1100–1700 ce). Pedestrian surface collection, soil phosphorus analysis, and targeted test excavation, along with place‐name and field‐shape data, were used to investigate patterns of settlement, land use and landscape organization. The results from fieldwork revealed an inverse relationship between surface ceramic densities and soil phosphate levels, suggesting different areas of rubbish disposal, habitation and agricultural practices. This case study illustrates both the benefits and challenges of synthesizing archaeological, geochemical and historical lines of evidence in the exploration of past human landscapes in central Europe. Copyright © 2014 John Wiley & Sons, Ltd.
A Hierarchical Nanostructured Carbon Nanofiber–In2S3 Photocatalyst with High Photodegradation and Disinfection Abilities Under Visible Light
Authors: Gao Peng , Li An Ran , Tai Ming Hang , Liu Zhao Yang , Sun Darren Delai 
Published: April 2014

AbstractPhotocatalytic degradation of pollutants under visible light provides a new door to solve the water contamination problem by utilizing free and renewable sunlight. The search for highly efficient photocatalysts with hierarchical nanostructures remains crucial for accessing this new door. In this work, a new hierarchical nanostructured photocatalyst is designed and synthesized, for the first time, by anchoring In2S3 flower‐like nanostructures on non‐woven carbon nanofiber (CNF). The nanostructures of these CNF–In2S3 composites were fine‐tuned, with the aim of achieving the highest photocatalytic activity under visible light. The formation mechanism of the hierarchical nanostructure is also investigated. The results indicate that the optimized hierarchical CNF–In2S3 photocatalyst is superior in photodegradation and disinfection efficiency to that of pure In2S3 under visible‐light irradiation. The prominent photocatalytic activities of these hierarchical CNF–In2S3 photocatalysts can be attributed to the excellent properties of enhanced light absorption, large surface area, and efficient charge separation, which are all derived from the special three‐dimensional hierarchical nanostructures. Therefore, this work presents the great potential of this hierarchical nanostructured CNF–In2S3 photocatalyst in practical environmental remediation fields.
Strong Antiferromagnetic Coupling of Spins in the (MDABCO+)(C60.−) Salt with 3D Close Packing of the C60.− Radical Anions (MDABCO+: N‐Methyldiazabicyclooctanium Cation)
Authors: Konarev Dmitri V. , Khasanov Salavat S. , Otsuka Akihiro , Yamochi Hideki , Saito Gunzi , Lyubovskaya Rimma N. 
Published: April 2014

AbstractA new salt, (MDABCO+)(C60.−) (1; MDABCO+=N‐methyldiazabicyclooctanium cation), was obtained as single crystals. The crystal structure of 1 determined at 250 and 100 K showed 3D close packing of fullerenes with eight fullerene neighbors for each C60.−. These neighbors are located at 10.01–10.11 Å center‐to‐center distances (250 K) and van der Waals interfullerene C⋅⋅⋅C contacts are formed with four fullerene neighbors arranged in the bc plane. Fullerene ordering observed below 160 K is accompanied by the appearance of one and a half independent C60.− and trebling of the unit cell along the b axis. Fullerenes are packed closer to each other at 100 K. As a result, fullerenes are located in the three‐dimensional packing at 9.91–10.12 Å center‐to‐center distances and 18 short interfullerene C⋅⋅⋅C contacts are formed for each C60.−. Although they are closed packed, fullerenes are not dimerized down to 1.9 K. Magnetic data indicate strong antiferromagnetic coupling of spins in the 70–300 K range with a Weiss temperature of Θ=−118 K. Magnetic susceptibility shows a round maximum at 46 K. Such behavior can be described well by the Heisenberg model for square two‐dimensional antiferromagnetic coupling of spins with an exchange interaction of J/kB=−25.3 K. This magnetic coupling is one of the strongest observed for C60.− salts.
Synthesis and Characterization of Two‐Photon Chromophores Based on a Tetrasubstituted Tetraethynylethylene Scaffold
Authors: Lin Tzu‐Chau , Liu Yi‐You , Li May‐Hui , Liu Che‐Yu , Tseng Sheng‐Yang , Wang Yu‐Ting , Tseng Ya‐Hsin , Chu Hui‐Hsin , Luo Chih‐Wei 
Published: April 2014

AbstractA new series of model dye molecules composed of three multibranched analogues based on the tetrasubstituted tetraethynylethylene structural motif have been synthesized and experimentally shown to possess strong and widely dispersed two‐photon absorption (2PA) in the near‐IR region. It was found that the spectral position of the major 2PA band could be tuned by the electronic nature of the selected substitution units. The studied model fluorophores also exhibited fairly low photodegradation of their fluorescence intensity even under prolonged UV‐light irradiation, which is beneficial for the development of fluorescence probes that are needed for long‐term light exposure. Furthermore, representative chromophores were selected to demonstrate the power‐control properties within the femtosecond and nanosecond time domains.
Arrays: A software package for analysis of antenna arrays
Authors: Elsherbeni Atef Z. , Ginn Patrick H. 
Published: April 2014

AbstractThis article describes a software package useful for the instruction of antenna array theory. The program provides the radiation pattern of different types of antennas, the array factor of linear, two‐dimensional and three‐dimensional arrays, and the total radiation pattern. The elements of the array are isotropic source, Hertzian dipole, straight thin wire dipole, and finite line source with uniform current distribution. The user has the freedom to choose one of the supported element types or to provide the pattern of an antenna element based on experimental or calculated data. This article serves as a tutorial for selected examples as well as a quick guide for the use of this software.
Unconventional engineering teaching tools
Authors: McCormack Scott E. , Compton Richard C. 
Published: April 2014

AbstractThis article describes progress on the development of a new engineering course for freshman students. During the course, students work on a series of projects aimed at illustrating various aspects of the design cycle. To aid in the design, students are encouraged to experiment with personal computers equipped with multimedia, computer‐aided design software, and data acquisition hardware.
User‐controlled design and collaboration
Authors: Gay Geri , Mazur F. E. , Masiclat Stephen 
Published: April 2014

AbstractAt the heart of a user‐centered system for studying, practicing, creating, and teaching engineering design; in collaboration with instructors and other students and across a fiber‐optic network; and with access to extensive and ever‐expanding sets of digitally stored databases is a user notebook. This article describes the notebook under development, argues the specific attributes of its various tools for the single user to command, and illustrates the anticipated use of the notebook as the center of a computer “creation‐station.”
Interactive video lessons for electromagnetic education
Authors: Iskander Magdy F. , Reed Thomas , Breen Joseph 
Published: April 2014

AbstractWith the availability of a large number of software packages for electromagnetic (EM) education through the national Computer Applications in Electromagnetic Education (CAEME) Center [1] and other individual efforts, there have been some concerns regarding the ability to integrate this software effectively in routine classroom teaching. Basically, congested EM curricula do not provide instructors with sufficient time to include software demonstrations and simulations during class periods. It is also not clear whether students will be able, adequately and independently, to understand basic underlying concepts and physical phenomena from visualization of colorful graphics and from the output of performed simulations. To help integrate available EM software in classroom teaching for both instructor use and student independent study, CAEME developed three interactive video lessons for student instruction. Interactive media lessons integrate and allow individuals to interactively manipulate information from multimedia such as video, software, and animated graphics, and also include instructional information such as quizzes and tutorials. In this article, we present the features of three interactive video lessons in EM developed by CAEME. These lessons include tutorials, simulations from CAEME software and videos, and quizzes to evaluate student understanding. The lessons use animated graphics illustrating specific dynamic phenomena and specific measurement procedures. They also keep a record of student quiz scores for instructor use. These, as well as other features of the three developed interactive video lessons, and the software and hardware requirements for developing such lessons, will be described.
Multimedia and case studies in structural engineering
Authors: Deierlein G. G. , Valenzuela M. L. , White R. N. 
Published: April 2014

AbstractA computer‐based multimedia system has been developed for the storage, retrieval, and display of slide images and information to support the use of case studies in the undergraduate engineering curriculum. Case studies are presented as an effective means of integrating design context into the classroom to motivate students and appeal to what educational psychologists term sensory learning styles. A detailed description of the multimedia system with feedback on its trial use in the classroom is included.
Using student projects to develop instructional applications and teach computer graphics programming
Authors: Mink Kate 
Published: April 2014

AbstractComputer graphics programming is an extremely popular elective for engineering undergraduates. This article describes our experience in teaching students the techniques of developing interactive computer graphics applications, and in supervising them as productive developers of instructional applications. The features of EMU, a graphics program for displaying electromagnetic fields in waveguides and around antennas, are described as an example of software developed by students at Cornell.
Concurrent structural analysis and experimentation using the “AN/EX” mini‐laboratory
Authors: Behr Richard A. 
Published: April 2014

AbstractA new, practical, computer‐assisted laboratory has been developed for teaching structural engineering. Using the portable “AN/EX” mini‐laboratory, students first predict the behavior of a small‐scale model using the M‐STRUDL structural analysis program. Then, they employ electronic sensors to record the physical response of the loaded model. Immediately thereafter, the analytical M‐STRUDL predictions and experimental data are compared graphically. An expert system “trouble‐shooter” is being developed to assist in resolving differences between the analytical predictions and the concurrent experimental data.
Development and integration of an equation‐solving program for engineering thermodynamics courses
Authors: Klein S. A. 
Published: April 2014

AbstractThermodynamics problems can be separated into conceptual and mathematical parts. The conceptual part consists of the problem formulation and analysis. The mathematical part seeks to obtain an answer to a problem by solving the equations identified in the analysis. The mathematical part can be complex and time‐consuming and often directs the students' focus away from the concepts. An equation solving program called Engineering Equation Solver (EES) was developed to reduce the time and effort required by students to solve the mathematical part of thermodynamics problems. EES differs from existing equation solving programs in that it is designed for use by students and it includes an extensive library of built‐in functions for thermodynamic and transport properties of fluids. Thermodynamic and transport property data needed for solving engineering problems (eg, steam tables, refrigerant properties, psychrometric and combustion gas data) are built into the program. By eliminating table lookups and algebra, EES allows students to concentrate on engineering fundamentals, as well as to do more complex design problems.
Using the computer to enhance the learning of engineering concepts: Some examples
Authors: Smetana Frederick O. 
Published: April 2014

AbstractThe problem‐solving functions addressed by author‐written software for a number of mechanical and aerospace engineering courses are described. Typical input and output are described or shown. It was found to be necessary to explain program results to students as well as how to enter data for a new problem solution. Other faculty teaching the course were generally reluctant to learn specific educational software, preferring to let students do this on their own.
Industry–university seminars
Authors: Gray Paul E. , Kuziej Gregory P. 
Published: April 2014

AbstractSpeakers from industry present seminars at IEEE Student Branch meetings where technical content is typically directed at the senior. The seminar is advertised in a meeting notice and requires neither preparation nor follow‐up by the student. This article reports the use of electronic mail to provide seminars for the sophomore within the circuit analysis course. e‐mail communication involves the student in seminar preparation, presentation, and subsequent follow‐up after the seminar.
Educational software for teaching physics—1993 directory
Authors: Wilkinson Ladye K. , Gjertsen Margaret H. , Risley John S. 
Published: April 2014

AbstractWe present a directory of software that is available for teaching physics and engineering. This directory was originally developed for physics educators, but the cross‐disciplinary nature of many of the packages makes it appropriate for the engineering community as well. The directory is derived from a data base maintained by the Physics Courseware Evaluation Project (PCEP) at North Carolina State University. PCEP has been tracking software developments and reviewing physics courseware since 1983. Some of the major trends that have been observed in that time are noted below, followed by the listing of software and a listing of publisher addresses.
Applications of computer algebra systems in electromagnetics education
Authors: Cecchini Roberto , Pelosi Giuseppe 
Published: April 2014

AbstractIn this article, a possible use of a computer algebra system as a support to the theoretic lessons in an electromagnetics course is shown. It is believed that such a system can be helpful, because it avoids encumbering the lessons with long calculations that would add nothing to the understanding of the problem, thus allowing the student to concentrate on more important topics.
Computation of electric fields from electric charges: Coulomb's law or poisson's equation
Authors: Fazarinc Zvonko 
Published: April 2014

AbstractCoulomb's Law and Poisson's equation are revisited and compared as algorithms for computer evaluation of electric force fields. In the course of this examination we point to the danger of applying physical laws measured in three‐dimensional space to spaces of other dimensionalities. The algorithms based on Coulomb's Law and on Poisson's equation are cast in C‐language and are illustrated with a two‐dimensional example.
SIGNALS: Interactive software for one‐dimensional signal processing
Authors: Easton Roger L. 
Published: April 2014

AbstractThis article describes the features of a DOS program that was written for interactive demonstrations of one‐dimensional (1‐D) signal processing concepts in a classroom environment. It also is used to illustrate aspects of linear systems, physical optics, and complex numbers. The program is menu‐driven, and experience has proven that it is easy to learn and use. Complex‐valued functions are loaded from a sizeable menu of options and may be processed in a variety of ways and plotted in several formats. Data files may be input from or output to other applications, e.g. spreadsheets.
Interactive tools for signal processing education: The signal processing instructional facility (SPIF Lab) at washington state university
Authors: Bamberger Roberto H. 
Published: April 2014

AbstractThe Signal Processing Instructional Facility (SPIF Lab) is an experiment in using in interactive multimedia for teaching concepts related to linear systems theory and signal processing. The goals of the SPIF lab are to augment, enhance, and interconnect sophomore, junior, and senior level courses with the common thread of linear systems and transforms by unifying the experimentation medium. In this fashion, physical phenomenon is returned to the forefront of engineering education. The laboratory features powerful Mathematica Notebooks (a form of hypertext) and interactive applications that use dedicated DSP microprocessors.
What's DUE
Authors: Fortenberry Norman L. 
Published: April 2014

AbstractFROM THE EDITOR: This new department in our CAE journal was created to help inform our readers of the ongoing activities in the Division of Undergraduate Education at the National Science Foundation. The services, announcements, and grant awards of this division are vital to engineering education and are certainly crucial to sustaining faculty commitment to and interest in new developments in undergraduate education.I am delighted to introduce Dr. Norman L. Fortenberry, who kindly agreed to edit the “What's DUE” department. As you may have noticed, DUE stands for Division of Undergraduate Education. Dr. Fortenberry is a program director in this division and, unlike others who tend to be visiting scientists on one‐ or two‐year assignments, he is a permanent staff member in this division. Dr. Fortenberry has worked hard to make it possible to work with us on creating this new “What's DUE” department; on behalf of our Editorial Board and the publication staff from John Wiley & Sons, we welcome him most warmly and pledge to work hard with him to make the publication of his department timely and informative.
RECIA: Software for the use of simulators in introductory circuit‐theory courses
Authors: Ballesteros J. L. , Báez‐López D. 
Published: April 2014

AbstractCircuit simulators play an important role in circuit design. However, their sintaxis is usually not friendly for students having their first exposure to this technology, causing reluctance toward the use of these kind of software aids. This fact was a driving force for the authors to propose a system called RECIA, by means of which the student could have access to a circuit simulator without having any knowledge about the sintaxis of it. In addition, input/output to the system is in a graphic environment. In this way, the student only has to specify as input the schematic diagram of his/her circuit and obtain as the output plots of the desired voltages and currents. The simulator chosen in this work can be anyone belonging to the family of SPICE simulators. RECIA is a shareware package available on request from the authors. One of the most important aspects of RECIA is that it does not need previous extensive training to be readily used by students and yet, a simulation run can be done in the very first minutes of use. This is an advantage over other simulators with schematic capture which require some time to learn the sintaxis.
Graphical simulation of a mobile robot
Authors: Gomez‐Pulido Juan A. , Giron‐Sierra Jose M. , Andres‐Toro Bonifacio 
Published: April 2014

AbstractSome facets of our robotics research require the simulation of a mobile vehicle to study navigation and control problems. We have developed a 3‐D animated graphical simulation of the movement of a wheeled vehicle under interactive control of the computer user. The article describes the mathematical formulation of the dynamics and the programming procedure to display the vehicle movement. Besides the possible use of our program for robotics education, the aspects covered by this article could be useful for motivating mechanics and graphics programming.
Pedagogically effective programming environment for teaching mechanism design
Authors: Cheng Harry H. 
Published: April 2014

AbstractThe CH programming environment is an open system. Users can enhance the system through its various user interfaces. CH is specially designed for applications in mechanical systems engineering, although it is applicable to many other disciplines as well. CH has been successfully used as a teaching and learning tool for an undergraduate course, Computer‐Aided Mechanism Design, at the University of California, Davis in Fall 1993. In this article we will present the CH programming environment and programming features developed for teaching and student learning. We will describe how a teaching toolbox is developed and used for teaching mechanism design. Source codes in the teaching toolbox are available to students so that they can study the software implementation of algorithms and modify the codes to solve similar problems. Although the developed teaching toolbox is specific for instruction on mechanism design, the CH programming environment and ideas presented in this article are general, and they are applicable to instructional improvement for a wide range of subjects in engineering.
Interactive stress analysis: Boundary formulations in engineering instruction
Authors: Kane J. H. , Matalus B. , Balakrishna C. , Hudman M. 
Published: April 2014

AbstractThis article describes a program based on the boundary element analysis (BEA) method that has been designed to bring continuum stress analysis to the academic environment. Interactive Stress Analysis is a unique interactive graphic computer program designed for use in undergraduate engineering education that allows students and instructors to pose continuum stress analysis problems naturally and examine their answers. Currently, the program is in a prototypical, yet demonstrable form. First deployment in a strength of materials course is planned for Fall 1994. With additional support we propose to investigate the incorporation of multimedia technology and an enhanced version of Interactive Stress Analysis in a prototype lecture series on strength of materials with potential widespread distribution. In the sections that follow, the capabilities, techniques employed, and overall rationale and philosophy associated with the development of this program are described.