排序方式： 共有29条查询结果，搜索用时 421 毫秒
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Devendra Potnis Kanchan Deosthali Xiaohua Zhu Rebecca McCusker 《Library & information science research》2018,40(2):106-117
Academic libraries invest millions of dollars to make electronic resources such as e-books available to students for free. However, free access might not necessarily result in students' sustained interest in and use of e-books. This interdisciplinary, mixed methods research investigates the factors influencing the intention of 279 undergraduate students to use e-books at a land-grant university in the southern US. Structural equation modeling of the survey responses suggests that organizational environment for information technology, external locus of control, subjective norm, perceived enjoyment (i.e., joyfulness), and information technology features play a significant role in influencing the intention of students to use e-books. Based on a combination of quantitative results and qualitative findings, this study identifies eight activities that libraries need to undertake in order to increase the use of e-books by undergraduate students. 相似文献
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Publics and counterpublics 总被引：1，自引：0，他引：1
Dilip Parameshwar Gaonkar 《Quarterly Journal of Speech》2013,99(4):410-412
This essay traces seven stages in the American controversy over abortion between 1960 and 1980. The argument moved from a professional debate to a public dispute marked first by narratives, then successively by the ideographs “life,” “discrimination,” and “choice,” and then to a normalization and stalemate in which the public consensus reflects values and interests from both sides of the conflict. 相似文献
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Surabhi Potnis 《Resonance》2017,22(3):257-268
This article aims to highlight the amazing properties and potential uses of the more recently developed allotropes of carbon such as carbon nanotubes, graphene, fullerene, and buckypaper. This is an area offering wide opportunity for research, especially due to the multidisciplinary nature of applications. 相似文献
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Students and parents rely on Web-based tools to navigate the college-choice process, yet little research has been done to understand this environment. While this shift has made the process easier to navigate for some, we contend that the move will grow an already large digital divide in the USA. We use Hossler and Gallagher's college-choice framework to examine the substance and function of three college-access Web portals. Our findings suggest these tools are likely to serve many students well in the process, but may exacerbate the digital divide with consequences for low-income students. 相似文献
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Devendra Sahal 《Research Policy》1985,14(2):61-82
This paper presents an integrative view of innovation processes based on a theory of systems developed by the author over the past few years. In its essence, one of the most important clues to the origin of innovations is to be found in the fact that the performance of every technology depends upon its size and structure. Specifically, as a technology is continuously made to become larger or smaller, the relationship between its size and structural requirements changes, which in turn, severely limits the scope of its further evolution. Thus the origin of a wide variety of innovations lies in learning to overcome the constraints that arise from the process of scaling the technology under consideration. In short, technical progress is best characterized as a process of learning by scaling.These considerations in turn point to a trilogy of innovations corresponding to three main types of technological constraints: structural innovations that arise from a process of differential growth whereby the parts and the whole of a system do not grow at the same rate: material innovations involving a change in the construction stuff; and systems innovations that arise from the integration of two or more symbiotic technologies in an attempt to simplify the outline of the overall structure. The proposed trilogy is shown to account for the emergence of various techniques including the so-called revolutionary innovations in a variety of fields.The theory is developed and illustrated through three case studies of technical progress in the aircraft, farm tractor, and computer industries. The results of our investigation further reveal that the process of innovation is best conceived in terms of a certain topography of technological evolution. Specifically, we find that technical progress is invariably characterized by the existence of what may be called technological guideposts and innovation avenues that lay out certain definite paths of development. Chance determines which amongst many technological guideposts will be chosen in the course of development. Once the development is well along a certain innovation avenue. necessity prevails until another point connecting other technological guideposts and innovation avenues is reached. This brings chance back to the fore and the process continues. In sum, the process of technological evolution is determined by the interplay of chance and necessity rather than one at the exclusion of the other. 相似文献
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A method is advanced for the design of linear controllers for a class of nonlinear systems. The systems considered in this paper are characterized by the presence of a dominant nonlinearity located in a specified sector. The proposed approach is digital-computer oriented, and design results are presented in parameter planes and parameter space. 相似文献