Journal of the Visualization Society of Japan
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
Current issue
Displaying 1-6 of 6 articles from this issue
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  • Ken YAMAMOTO, Chieko KATO
    2024 Volume 44 Issue 169 Pages 2
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
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  • ― Focus on Uchida-Kraepelin Psychodiagnostic Test ―
    Motomu HAISHIMA, Chieko KATO, Akiko HIGASHIYAMA
    2024 Volume 44 Issue 169 Pages 7-10
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
    Supplementary material

      The connection between psychology and statistics is profound, as research in goal setting and mental health has demonstrated the relevance of goals and commitment. Additionally, psychology has integrated with data science, improving the effectiveness of sandbox therapy through visualization. The widely used psychological assessment method known as the work test has found applications in the field of sports. In a study using the Uchida-Kraepelin test, a representative example of the work test, on a rugby team, no significant differences were observed in the psychological state among regular and non-regular players or among players in different positions. An approach that emphasizes respecting individuality and promotes team diversity was suggested to contribute to performance improvement, alongside sport-specific factors.

     

      The fusion of psychology with statistics and data science provides a comprehensive understanding. Combining statistical methods with psychological assessments enables highly reliable evaluations, leading to sound conclusions in psychological research and clinical practice, and contributing to interdisciplinary development.

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  • ― Survival Strategies of Unicellular Eukaryotes ―
    Yukinori NISHIGAMI
    2024 Volume 44 Issue 169 Pages 11-14
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
    Supplementary material

    Unicellular eukaryotes, known as protists, are responsible for the diversity of eukaryotes. Protists are known to influence the environment through energy loops. In this process, the distribution of protists is one of the crucial factors. The behavior of individual protists makes the distribution of them. Protists behave in response to their extracellular environment. This behavior makes the distribution of protists. In this paper, I review our recent studies on the behavior and locomotion of protists, including the accumulation of ciliates on the wall, near-wall rheotaxis behavior of a ciliate, cellular membrane dynamics of amoeba, recognition of extracellular shapes by a ciliate, and building behavior of a tested amoeba. Studying the diverse behaviors and movements of these protists may, in addition to shedding light on the unique behavioral mechanisms of protists, lead to the development of methods applied to other cells in multicellular organisms.

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  • Daichi SASAKI
    2024 Volume 44 Issue 169 Pages 15-18
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
    Supplementary material

    In this paper, we describe our proposed new ceramic preparation method: corrosion synthesis method. This method is classified as a type of liquid phase method and metal corrosion is used in the process. In corrosion engineering, the main focus is on making machines and structures last longer. The research has revealed the conditions that shorten the life of the material; in other words, corrosion ratio is increased. Corrosion synthesis method uses it in reverse, that is to say, ceramics are prepared by using spontaneous corrosion reactions. For example, when metallic magnesium was corroded in ethanol with aluminum chloride, magnesium spinel was obtained by calcination at 1473K. The particle sizes of the above magnesium spinel ranged from 0.7μm to 22μm, and the mode of the particle size distribution was 3.6μm. Through the preparation of magnesium spinel, we compared corrosion synthesis method with sol-gel method and solid-phase reaction method. And the characteristics of corrosion synthesis method was summarized.

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  • ― From Breath Visualization to Pressure Field of Underwater Shock Wave ―
    Sayaka ICHIHARA, Yoshiyuki TAGAWA
    2024 Volume 44 Issue 169 Pages 19-22
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
    Supplementary material

    The background oriented schlieren (BOS) technique can measure the pressure field of a measurement target by using only a background image and a camera, thus can easily achieve non-contact visualization and quantitative measurement. Based on our previous studies, we introduced three applications of the BOS: visualization of transparent objects in fluid, visualization of exhaled breath, and pressure field measurement of underwater shock waves. BOS can visualize objects with small density differences (exhaled breath) by increasing the measurement sensitivity through increasing the distance between the object and the background image. For pressure field measurement, we proposed a BOS with a novel constructed 3D reconstruction, i.e. VT-BOS. VT-BOS has a accuracy that is nearly independent of spatial resolution and a computational cost of 1/10,000 of conventional BOS. In the future, VT-BOS can be expected to a pressure field measurement method in substitute of contact measurement methods such as hydrophone.

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  • ―Spatial Visualization of Ultrasonic Pulse using Stereo Images―
    Taiki YOSHIDA, Sanehiro WADA, Noriyuki FURUICHI
    2024 Volume 44 Issue 169 Pages 23-27
    Published: 2024
    Released on J-STAGE: January 01, 2025
    JOURNAL FREE ACCESS
    Supplementary material

    The error evaluation of the ultrasonic radiation angle for the casing axis of the ultrasonic element is a critical calibration parameter for flow velocity measurement technology. To evaluate the radiation angle error of a transducer, measuring the ultrasonic propagation characteristics in three-dimensional space is necessary, but conventional methods have not reached the technical level to evaluate the radiation angle on the order of 0.01°. To improve the measurement time and spatial resolution, which are important issues, in this study, we constructed an evaluation system for the propagation characteristics of pulse echoes emitted from ultrasonic elements. This method collects many ultrasonic waveforms and three-dimensional coordinate information of particles randomly dispersed in water. Spatial visualization using stereo images was used as the three-dimensional coordinate reference value. As a result, we were able to quantitatively evaluate and calibrate the propagation characteristics of the ultrasonic element, such as the central axis and the propagation width of the ultrasonic pulse. Unlike conventional evaluation methods that mainly evaluate sound pressure field measurements, this evaluation method is novel in evaluating the spatial distribution of pulse-echo waveforms, which is unprecedented.

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