424,961 research outputs found

    A Review of Smart Materials in Tactile Actuators for Information Delivery

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    As the largest organ in the human body, the skin provides the important sensory channel for humans to receive external stimulations based on touch. By the information perceived through touch, people can feel and guess the properties of objects, like weight, temperature, textures, and motion, etc. In fact, those properties are nerve stimuli to our brain received by different kinds of receptors in the skin. Mechanical, electrical, and thermal stimuli can stimulate these receptors and cause different information to be conveyed through the nerves. Technologies for actuators to provide mechanical, electrical or thermal stimuli have been developed. These include static or vibrational actuation, electrostatic stimulation, focused ultrasound, and more. Smart materials, such as piezoelectric materials, carbon nanotubes, and shape memory alloys, play important roles in providing actuation for tactile sensation. This paper aims to review the background biological knowledge of human tactile sensing, to give an understanding of how we sense and interact with the world through the sense of touch, as well as the conventional and state-of-the-art technologies of tactile actuators for tactile feedback delivery

    Aplikasi Kewibawaan Dan Kewiyataan Dalam Proses Pembelajaran Sebagai Wujud Pemahaman Guru Terhadap Hakekat Kemanusiaan Peserta Didik

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    The principles of educational science emphasize the importance of relation between educators and students in high-touch situation. This touch is based on how far educators understand the nature of students as the subject of learners rather than the object of teachers. This understanding and its application by teachers in the learning process in school is presumedly low. The general aim of this study was to get description of teachers' understanding about the students and its application in learning process. The results of this study revealed that: 1) in general, teachers understanding toward students is in a middle category, and so is with its application toward learning process; 2) five observable variables about the nature of man are valid and can be used to explain teachers' understanding about the nature of students as latent variable, and six observable variables about high touch are valid and can be used to explain high touch application as application of teachers' understanding about student in learning process

    QCD: Challenges for the Future

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    Despite many experimental verifications of the correctness of our basic understanding of QCD, there remain numerous open questions in strong interaction physics and we focus on the role of future colliders in addressing these questions. We discuss possible advances in the measurement of αs\alpha_s, in the study of parton distribution functions, and in the understanding of low xx physics at present colliders and potential new facilities. We also touch briefly on the role of spin physics in advancing our understanding of QCD.Comment: 12 pages, LATEX2e with snow2e, epsfig and 2 figures. Also available at http://penguin.phy.bnl.gov/~dawson/qcdsnow.ps . QCD working group summary at DPF/DPB Summer Study on New Directions for High Energy Physics, Snowmass, CO, June 25- July 12, 199

    On Touch and Life in the De Anima

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    Although Aristotle is often thought to give canonical voice to the priority of vision as the most noble of the human powers of perceiving, this article demonstrates that in Aristotle, touch has a priority vision lacks. By tracing the things Aristotle says about touch in the De Anima and specifically the manner in which he identifies touch as a kind of mean condition, this essay argues that a deeper understanding of the nature of touch connects us humans more deeply to animal life and the natural world we inhabit

    The Evolution of Strategic and Coordinated Bargaining Campaigns in the 1990s: The Steelworkers’ Experience

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    With the refocusing of attention of the labor movement on organizing, an increasing number of scholars have been directing their research toward the nature and practice of current union organizing efforts. These scholars have begun updating a literature that had grown sorely out of touch with the organizing experience of America’s unions and have provided the foundation for a more sophisticated understanding of the organizing process. While we applaud this resurgence in organizing research, there has not been a comparable resurgence in research on collective bargaining
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