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ATTIA Nabil Abdulla 《重庆大学学报(英文版)》2005,4(1):1-5
1 Introduction A traction drive is a device, which transmits powerby means of traction contacts among multiple rotatingbodies. Variable ratio power transmission is achievedby varying the system geometry so that the points ofaction of the traction force are varied. When this isdone in a continuous manner, it results in a conti-nuously variable traction drive varaitor. There areprimarily two types of traction drives that are ofinterest in the automotive area, viz., half toroidaltraction drive an… 相似文献
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Academic consulting is a form of knowledge and technology transfer largely under-documented and under-studied that raises ethical and resources allocation issues. Based on a survey of 2,590 Canadian researchers in engineering and natural sciences, this paper explores three forms of academic consulting: (1) paid consulting; (2) unpaid consulting for companies and; (3) unpaid consulting for government agencies. The results of this study show that academics tend to engage simultaneously in paid and unpaid consulting. Two patterns of consulting emerged from the results: a first pattern regarding engagement in paid consulting for companies and government agencies, and unpaid consulting for companies is positively associated with industry funding, size of research laboratories, large-sized research universities, technical validation of knowledge, protection of IP, and strong ties with people in companies. By comparison, a second pattern regarding engagement in unpaid consulting services provided to government organizations is positively associated with size of research laboratories, teaching, large-sized research universities, technical validation of knowledge, and with strong ties with people in government organizations. Knowledge and technology transfer policy should pay more attention to the contribution of academics engaged in consulting activities because they likely significantly contribute to help companies and government agencies solve practical problems that improve their productive and innovative capabilities. 相似文献
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Ghaleb A. Husseini Nabil M. Abdel-Jabbar Farouq S. Mjalli Ala’a Al-Mousa 《Journal of The Franklin Institute》2011,348(7):1276-1284
In this study, we present an artificial neural network (ANN) model that attempts to predict the dynamic release of doxorubicin (Dox) from P105 micelles under different ultrasonic power densities at 20 kHz. The goal is to utilize the developed ANN model in optimizing the ultrasound application to achieve a target drug release at the tumor site by controlling power density and ultrasound duration via an ANN-based model predictive control. The parameters of the controller are then tuned to achieve good reference signal tracking. 相似文献
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Organizations, of all types, live in an increasingly dynamic world. Much of this dynamism is generated by developments or innovations in technology, especially information and communication technology (ICT). Some organizations take advantage of this dynamism and create new products and business models and thrive. Others ignore it or take a long time trying to adapt to it and struggle, often with negative consequences. Some of these innovations, to use the terminology of Christensen, are of a “disruptive” nature such as the telephone, the Web and recently cloud computing. This paper explores the innovation phenomenon of cloud computing and Web 2.0 and specifically examines their impact on organizational knowledge. 相似文献
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The purpose of this paper is to explore whether six broad categories of knowledge transfer activities undertaken by academics: the creation and diffusion of knowledge through publications, transmission of knowledge through teaching, informal knowledge transfer, patenting, spin-off formation and consulting activities, are complementary, substitute, or independent, as well as the conditions under which complementarities, substitution and independence among these activities are likely to emerge. This investigation relied on data regarding 1554 researchers funded by the Natural Sciences and Engineering Research Council of Canada. Contrary to prior studies which have examined complementarities and the determinants of knowledge transfer activities in separate models, this study relied on a multivariate path model to reflect the fact that in practice, academics consider simultaneously whether or not to undertake multiple knowledge transfer activities. Overall, the results point to the existence of three very different types of knowledge transfer portfolios of activities: a first portfolio made up of complementary activities which are interdependent and reinforce each other. This portfolio includes publications, patenting, spin-off creation, consulting and informal knowledge transfer. A second portfolio includes teaching activities and publication outputs which are substitute for each other. A third portfolio comprises teaching activities and other activities independent from teaching, namely, patenting, spin-off creation, consulting and informal knowledge transfer. Each of these three portfolios of knowledge transfer activities emerged under different conditions. Implications are derived for managerial practice and future research. 相似文献
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There has never been a more disruptive innovation in the IT landscape such as cloud computing since the emergence of the Web in the early 1990s. This IT delivery service has the potential to change many aspects of organizations’ operations, thinking, culture, work and their ability to control global warming. With the increasing ubiquity and pervasiveness of mobile devices, cloud computing's impact could be even greater and much wider in its reach. But this emerging innovation has many hurdles to surmount to become the “telephone” or the “water” equivalent of the IT world. An examination of these issues will be made in this article and an exploration of the empowering and democratizing credentials of cloud computing will be attempted. 相似文献
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Four experiments test the hypothesis that escape learning in response to shock will transfer to a similar food-reinforced response and affect resistance to appetitive extinction. In the first two experiments, subjects were given escape training in a straight alley followed by continuous food reinforcement and then extinction. Prior escape training resulted in greater resistance to extinction of the food-reinforced response as compared to several control procedures. In the third experiment, the escape response was manipulated to be compatible or incompatible with the subsequent food-reinforced response. Greater resistance to extinction was shown when the two responses were compatible. The fourth experiment confirmed and extended this finding. The relationship of the present results to Amsel’s theory of persistence was discussed. 相似文献
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Evaluation by medical students of the educational value of multi‐material and multi‐colored three‐dimensional printed models of the upper limb for anatomical education 
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下载免费PDF全文 Sreenivasulu Reddy Mogali Wai Yee Yeong Heang Kuan Joel Tan Gerald Jit Shen Tan Peter H. Abrahams Nabil Zary Naomi Low‐Beer Michael Alan Ferenczi 《Anatomical sciences education》2018,11(1):54-64
For centuries, cadaveric material has been the cornerstone of anatomical education. For reasons of changes in curriculum emphasis, cost, availability, expertise, and ethical concerns, several medical schools have replaced wet cadaveric specimens with plastinated prosections, plastic models, imaging, and digital models. Discussions about the qualities and limitations of these alternative teaching resources are on‐going. We hypothesize that three‐dimensional printed (3DP) models can replace or indeed enhance existing resources for anatomical education. A novel multi‐colored and multi‐material 3DP model of the upper limb was developed based on a plastinated upper limb prosection, capturing muscles, nerves, arteries and bones with a spatial resolution of ～1 mm. This study aims to examine the educational value of the 3DP model from the learner's point of view. Students (n = 15) compared the developed 3DP models with the plastinated prosections, and provided their views on their learning experience using 3DP models using a survey and focus group discussion. Anatomical features in 3DP models were rated as accurate by all students. Several positive aspects of 3DP models were highlighted, such as the color coding by tissue type, flexibility and that less care was needed in the handling and examination of the specimen than plastinated specimens which facilitated the appreciation of relations between the anatomical structures. However, students reported that anatomical features in 3DP models are less realistic compared to the plastinated specimens. Multi‐colored, multi‐material 3DP models are a valuable resource for anatomical education and an excellent adjunct to wet cadaveric or plastinated prosections. Anat Sci Educ 11: 54–64. © 2017 American Association of Anatomists. 相似文献
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Why are some university researchers more likely to create spin-offs than others? Evidence from Canadian universities 总被引：2，自引：1，他引：2
This paper addresses the following question: why are some university researchers more likely to create spin-off companies than others? In order to explain why university researchers create spin-offs, we draw on the resource-based theory of the firm. The study database consists of 1554 university researchers funded by the Natural Sciences and Engineering Research Council of Canada (NSERC). The logistic regression results suggest that the traditional and entrepreneurial visions of university research complement each other when one looks at the resources mobilized by researchers to launch spin-offs. 相似文献
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