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Diverse touch experiences offer a path toward greater human–machine interaction, which is essential for the development of haptic technology. Recent advances in triboelectricity-based touch sensors provide great advantages in terms of cost, simplicity of design, and use of a broader range of materials. Since performance solely relies on the level of contact electrification between materials, triboelectricity-based touch sensors cannot effectively be used to measure the extent of deformation of materials under a given mechanical force. Here, an ion-doped gelatin hydrogel (IGH)-based touch sensor is reported to identify not only contact with an object but also deformation under a certain level of force. Switchable ionic polarization of the gelatin hydrogel is found to be instrumental in allowing for different sensing mechanisms when it is contacted and deformed. The results show that ionic polarization relies on conductivity of the hydrogels. Quantitative studies using voltage sweeps demonstrate that higher ion mobility and shorter Debye length serve to improve the performance of the mechanical stimuli-perceptible sensor. It is successfully demonstrated that this sensor offers dynamic deformation-responsive signals that can be used to control the motion of a miniature car. This study broadens the potential applications for ionic hydrogel-based sensors in a human–machine communication system.  相似文献   
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3 groups of Ss, college students, were formed: 2 exposed to a communication on juvenile delinquency and a control group that was not. One group read an appeal for the adoption of a punitive policy toward delinquents; the other group read the same basic communication with the addition of a few introductory statements. Both groups then responded to a modification of Form A of the Wang-Thurstone scale of attitude toward the treatment of the criminal. Judgment of the communicator's position was not found to be related to own opinion on the treatment of delinquents. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
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