Two-dimensional Scanning Tactile Display using Ultrasound Radiation Pressure

2006 ◽  
Author(s):  
T. Iwamoto ◽  
H. Shinoda
Keyword(s):  
Radiation Pressure ◽  
Tactile Display ◽  
Two Dimensional ◽  
Ultrasound Radiation

Development of Tactile-Proprioceptive Display and Effect Evaluation of Local Area Vibration Presentation Method

2017 ◽  
Vol 21 (1) ◽  
pp. 87-99
Author(s):  
Tadahiro Sakai ◽  
◽  
Takuya Handa ◽  
Masatsugu Sakajiri ◽  
Toshihiro Shimizu ◽  
...  
Keyword(s):  
Visually Impaired ◽  
Local Area ◽  
Tactile Display ◽  
Two Dimensional ◽  
Effect Evaluation ◽  
Line Segments ◽  
Visually Impaired People ◽  
Present Information ◽  
Impaired People ◽  
Presentation Method

We propose a new method of presenting two-dimensional information, such as figures and graphs, on a tactile display so that visually impaired people are able to perceive them quickly and accurately. The new presentation method is developed for a tactile-proprioceptive display, which can present information on not only conventional “concave–convex” tactile display, but also vibration presentation in arbitrary area on a tactile display and mechanical leading presentation by mechanically leading user’s fingers using haptic device. In this paper, we outline the abovementioned two presentation method and the developed tactile-prop display, and objectively evaluate the effects of the local area vibration presentation method as an integral part of the tactile-prop display in comparison with the conventional “concave–convex” presentation method. We conducted experiments to evaluate the effects of the proposed local area vibration presentation method using two typical content patterns. In Experiment 1, discreetly dispersed objects are searched, and in Experiment 2, the cross graphs of line segments are distinguished and perceived. The experiments have proved that the method is effective in reducing search and cognitive time as well as identifying the correct cognition of cross graphs, as compared to the “concave–convex” tactile presentation method.

scholarly journals Improvement of ion acceleration in radiation pressure acceleration regime by using an external strong magnetic field

2019 ◽  
Vol 37 (2) ◽  
pp. 217-222 ◽  
Author(s):  
H. Cheng ◽  
L. H. Cao ◽  
J. X. Gong ◽  
R. Xie ◽  
C. Y. Zheng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Radiation Pressure ◽  
Longitudinal Magnetic Field ◽  
Ponderomotive Force ◽  
Two Dimensional ◽  
Particle In Cell ◽  
Combined Action ◽  
The Magnetic Field

AbstractTwo-dimensional particle-in-cell (PIC) simulations have been used to investigate the interaction between a laser pulse and a foil exposed to an external strong longitudinal magnetic field. Compared with that in the absence of the external magnetic field, the divergence of proton with the magnetic field in radiation pressure acceleration (RPA) regimes has improved remarkably due to the restriction of the electron transverse expansion. During the RPA process, the foil develops into a typical bubble-like shape resulting from the combined action of transversal ponderomotive force and instabilities. However, the foil prefers to be in a cone-like shape by using the magnetic field. The dependence of proton divergence on the strength of magnetic field has been studied, and an optimal magnetic field of nearly 60 kT is achieved in these simulations.

Two-dimensional manipulation of micro particles by acoustic radiation pressure in a heptagon cell

2011 ◽  
Vol 58 (10) ◽  
pp. 2132-2138 ◽  
Author(s):  
A. L. Bernassau ◽  
Chun-Kiat Ong ◽  
Yong Ma ◽  
P. G. A. Macpherson ◽  
C. R. P. Courtney ◽  
...  
Keyword(s):  
Radiation Pressure ◽  
Acoustic Radiation ◽  
Two Dimensional ◽  
Micro Particles ◽  
Acoustic Radiation Pressure
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