San Diego State University

About: San Diego State University is a education organization based out in San Diego, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 12418 authors who have published 27950 publications receiving 1192375 citations. The organization is also known as: SDSU & San Diego State College.

A New Integration Method for an Electric Vehicle Wireless Charging System Using LCC Compensation Topology: Analysis and Design

Abstract: There is a need for charging electric vehicles (EVs) wirelessly since it provides a more convenient, reliable, and safer charging option for EV customers. A wireless charging system using a double-sided LCC compensation topology is proven to be highly efficient; however, the large volume induced by the compensation coils is a drawback. In order to make the system more compact, this paper proposes a new method to integrate the compensated coil into the main coil structure. With the proposed method, not only is the system more compact, but also the extra coupling effects resulting from the integration are either eliminated or minimized to a negligible level. Three-dimensional finite-element analysis tool ANSYS MAXWELL is employed to optimize the integrated coils, and detailed design procedures on improving system efficiency are also given in this paper. The wireless charging system with the proposed integration method is able to transfer 3.0 kW with 95.5% efficiency (overall dc to dc) at an air gap of 150 mm.

Coping with prostate cancer: a meta-analytic review.

Abstract: The present meta-analytic review assessed the relations between coping categories and indices of adjustment in men with prostate cancer. Relevant methodological and statistical information was extracted from 33 target studies (n = 3,133 men with prostate cancer). Men with prostate cancer who used approach, problem-focused, and emotion-focused coping were healthier both psychologically and physically, although the effect sizes for problem-focused coping and emotion-focused coping were more modest. For approach coping these effect sizes were particularly strong for measures of self-esteem, positive affect, depression, and anxiety. Conversely, men with prostate cancer who used avoidance coping experienced heightened negative psychological adjustment and physical health, and particularly for measures of positive mood and physical functioning. The findings of this study suggest that active approaches to coping with prostate cancer are beneficial psychologically, physically, and are positively associated with a return to pre-cancer activities.

Toward an agenda for advancing research on science learning in out-of-school settings

Abstract: The question, ‘‘What constitutes a reasonable, useful agenda for research into science learning in out-of-school, free-choice environments?’’ has surfaced with increasing frequency over the past 10 years or so. One event that helped move the agenda forward was the National Science Foundation–funded conference, ‘‘Public Institutions for Personal Learning: Understanding the Long-term Impact of Museums,’’ held in Annapolis in 1994. The proceedings of this conference, published by the American Association of Museums (Falk & Dierking, 1995), reflected a large step forward in setting out the research issues and questions involved. Although focused on museums (a generic term including all kinds of museums, botanical gardens, aquaria, zoos, and science and other interpretative centers), the issues discussed are applicable to a wide range of non-museum contexts. The Annapolis conference was conceived as a forum for frontline researchers in a variety of fields representing the physical, social, and personal dimensions of learning. The goal was to discuss how the thinking and modalities of their disciplines might shed insights into the nature of learning and be used to define and lay out a long-term research agenda in museums. At about the same time, a small group of science museum practitioners held several meetings under the auspices of the Association of Science and Technology Centers (ASTC) and the Institute of Museum Studies (IMS) to start thinking about a research agenda in their area of expertise. The results of the think tank meetings were published in six successive ASTC newsletters during 1996 (and are now available at http:/ /www.astc.org/resource/educator/educmain.htm#theories).

Application of feedforward neural networks to dynamical system identification and control

Abstract: Methods for identification and control of dynamical systems by adalines, two-layer, and three-layer feedforward neural networks (FNNs) using generalized weight adaptation algorithms are discussed. The FNNs considered contain odd nonlinear operators in both the neurons and the weight adaptation algorithms. Two application examples, each involving a nonlinear dynamical system, are considered. The first is identification of the system's forward and inverse dynamics. The second is control of the system using coordination of feedforward and feedback control combined with inverse system dynamics identification. Simulation results are used to verify the method's feasibility and to examine the effect of ENN parameter changes. Specifically the effect that the type of nonlinear activation functions present in the neurons and the type of nonlinear functions present in the weight adaptation algorithms have on FNN system dynamics identification performance is investigated. >