soft object
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Author(s):  
Javier Felix-Rendon ◽  
Juan Carlos Bello-Robles ◽  
Rita Q. Fuentes-Aguilar

Author(s):  
Toshiki Ikeda ◽  
Yuji Takeda

AbstractA previous study suggested that holding soft objects enhanced expectations of uncertain events and increased social pain under frequent negative feedback; i.e., higher expectations might have induced more disappointment. The present study examined the effects of holding a soft cushion under frequent positive feedback. Participants (n = 42) performed fair-play and over-inclusion blocks in the Cyberball task. Amplitudes of the contingent negative variation (CNV) of event-related brain potentials and subjective ratings of social pain were measured to estimate participants’ expectations and emotions, respectively. CNV amplitudes were higher in the over-inclusion block when participants held the soft than the hard cushion. There was a statistically marginal trend (p = .095) for lower social pain scores in the soft cushion condition than the hard cushion condition in contrast to previous findings. These results suggest that holding a soft object does not directly modulate emotions but instead acts through the mediation of enhanced expectations.


Author(s):  
Motoki Miyoshi ◽  
Parinya Punpongsanon ◽  
Daisuke Iwai ◽  
Kosuke Sato

FDM 3D printers allow massive creativity in personal products, but their potential has been limited due to inability to manipulating material properties. Previous work had demonstrated that the desired roughness could be presented simply by controlling the spatial density of tiny pins on a printed surface. This article offers a means of providing the desired softness perception of a printed surface and the desired roughness to expand the haptic dimension over which a user can exert control. Specifically, we control the softness by manipulating the infill structures of a printed surface. However, it is known that a skin contact area affects softness perception. The roughness, which is controlled by pins’ density, may also affect the perceived softness of a printed surface. Therefore, we investigate how the internal structures and the density of the pins affect softness perception. Through psychophysical experiments, we derive a computational model that estimates the perceived softness from the density of the pins and the infill density of a printed surface.


2020 ◽  
Vol 64 (1-4) ◽  
pp. 745-752
Author(s):  
Taku Wakayama ◽  
Takeshi Okuyama ◽  
Mami Tanaka

In this study, a palpation sensor system is developed to detect a lump in a soft object. The developed sensor system consists of a contact part using a bearing, two linear sliders and a 3-axis load cell. While the roller type contact part is scanned against a soft object, reaction force applied to the contact part is measured. Lumps are detected by measuring fluctuation of the reaction force. In experiments, the sensor system is scanned against the samples. From the results, it is found that the lump with a small diameter embedded at a deep position.


Author(s):  
Ryosuke TAKEMURA ◽  
Zhongkui WANG ◽  
Norimitsu SAKAGAMI ◽  
Sadao KAWAMURA

Author(s):  
Hangjie Mo ◽  
Bo Ouyang ◽  
Liuxi Xing ◽  
Dingran Dong ◽  
Yunhui Liu ◽  
...  
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