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Tactile and Chemical Senses01:27

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Design Example: Resistive Touchscreen01:14

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Tactile Semiautomatic Passive-Finger Angle Stimulator TSPAS
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Frequency of Switching Touching Mode Reflects Tactile Preference Judgment.

Takumi Yokosaka1, Masanobu Inubushi2,3, Scinob Kuroki2

  • 1NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, 3-1, Morinosato Wakamiya Atsugi-shi, Kanagawa, 243-0198, Japan. yokosaka.takumi@gmail.com.

Scientific Reports
|February 22, 2020
PubMed
Summary
This summary is machine-generated.

Exploring objects with hands reveals tactile preferences. Repeated hand motions correlate with higher preference, while varied motions indicate lower preference, offering insights into tactile exploration strategies.

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Area of Science:

  • Haptics and Human-Computer Interaction
  • Psychophysics
  • Robotics and AI

Background:

  • Tactile perception significantly influences affective judgments of objects.
  • Prior research focused on object surface properties, neglecting the role of active exploration strategies.
  • Understanding hand motion dynamics during tactile exploration is crucial for preference evaluation.

Purpose of the Study:

  • To investigate the relationship between explorative hand motion dynamics and tactile preference ratings.
  • To apply recurrence plot techniques for analyzing temporal dynamics of hand movements during tactile exploration.
  • To identify specific hand motion features that correlate with subjective tactile preferences.

Main Methods:

  • Participants freely explored tactile stimuli and provided preference ratings.
  • Recurrence plot techniques and recurrence quantification analysis were used to visualize and characterize temporal dynamics of finger velocity and force.
  • Correlations were analyzed between preference ratings and both time-averaged features and recurrence features (e.g., TREND).

Main Results:

  • Preference ratings correlated with temporal dynamics of hand motion, including recurrence features like TREND.
  • TREND, representing repeated motion patterns, showed a significant correlation with preference.
  • TREND differences may reflect the frequency of switching between different touching modes (e.g., stroking, pushing).

Conclusions:

  • Tactile preference is linked to the repetitiveness of hand motions during exploration.
  • Preferable objects elicit more repetitive hand movements, while less preferable objects involve varied touching modes.
  • Recurrence plot analysis offers a promising method for extracting and understanding human tactile exploration strategies.