Papers - Nakatani, Masashi

TECHTILE workshop for sharing haptic experiences(<Special Issue>Haptic Contents)

Nakatani Masashi, Kakehi Yasuaki, Minamizawa Kouta, Mihara Soichiro, Tachi Susumu

Transactions of the Virtual Reality Society of Japan (THE VIRTUAL REALITY SOCIETY OF JAPAN)  19 ( 4 ) 593 - 603 2014

ISSN  1344-011X

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Current Haptics technology is capable of manipulating the tactile perception of material properties. Although Haptics research is very popular in academic research, those technologies have not prevailed in general use yet. Here we report the development of an introductory haptic device called the "TECHTILE toolkit" that is capable of designing haptic experiences. We conducted usability study of our developed toolkit through conducting over fifty workshops world-wide that are for both professional researchers and general audience from elementary to collage levels. We also discuss the prospective applications of haptic devices by classifying participants' haptic experiences that were proposed during the workshop.

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Frontiers in epidermal barrier homeostasis–an approach to mathematical modelling of epidermal calcium dynamics

M Denda, S Denda, M Tsutsumi, M Goto, J Kumamoto, M Nakatani, ...

Experimental dermatology 23 (2), 79-82  2014

Distinct intracellular calcium responses of individual cultured human keratinocytes to air pressure changes

Kazuyuki Ikeyama, Masashi Nakatani, Junichi Kumamoto, Mitsuhiro Denda

Skin Research & Technology 19 ( 3 ) 346 - 351 2013.08

Joint Work, Accepted,  ISSN  0909-752X

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External negative electric potential accelerates exocytosis of lamellar bodies in human skin ex vivo

Junichi Kumamoto, Makiko Goto, Sumiko Denda, Masashi Nakatani, Yuya Takasugi, Katsunori Tsuchiya, Yuji Shimizu, Yusuke Takatsuru, Mitsuhiro Denda

Experimental Dermatology 22 ( 6 ) 421 - 423 2013.06

Joint Work, Accepted,  ISSN  0906-6705

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Softness sensor system for simultaneously measuring the mechanical properties of superficial skin layer and whole skin

Masashi Nakatani, Toru Fukuda, Naomi Arakawa, Tomoyuki Kawasoe, Sadao Omata

Skin Research & Technology 19 ( 1 ) e332 - e338 2013.02

Joint Work, Accepted,  ISSN  0909-752X

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Relationship between perceived softness of bilayered skin models and their mechanical properties measured with a dual‐sensor probe

M Nakatani, T Fukuda, H Sasamoto, N Arakawa, H Otaka, T Kawasoe, ...

International journal of cosmetic science 35 (1), 84-88  2013

External negative electric potential accelerates exocytosis of lamellar bodies in human skin tissue culture

I Kumamoto, M Denda, M Goto, S Denda, M Nakatani, Y Takasugi, ...

JOURNAL OF INVESTIGATIVE DERMATOLOGY 133, S105-S105  2013

In vitro formation of organized structure between keratinocytes and dorsal-root-ganglion cells

Moe Tsutsumi, Masashi Nakatani, Junichi Kumamoto, Sumiko Denda, Mitsuhiro Denda

Experimental Dermatology 21 ( 11 ) 886 - 888 2012.11

Joint Work, Accepted,  ISSN  0906-6705

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TECHTILE toolkit: a prototyping tool for design and education of haptic media

K Minamizawa, Y Kakehi, M Nakatani, S Mihara, S Tachi

Proceedings of the 2012 Virtual Reality International Conference, 1-2  2012

ヒト皮膚内部における温度時間変化と接触対象がもつ伝熱特性の関係

仲谷正史, 城堅誠, 川上直樹, 舘暲

日本バーチャルリアリティ学会 第7回力触覚の提示と計算研究会, HDC7-10  2011.11

Joint Work

さわれる情報環境構築に向けた触知覚特性の研究

仲谷正史, 舘暲

エンタテインメントコンピューティング, 03A-05  2011.10

Joint Work

指腹部変形の有限要素シミュレーションを用いたヒト凹凸触認識メカニズムの研究

新見孝之, 仲谷正史, 牧野泰才, 前野隆司

日本バーチャルリアリティ学会論文誌 16 ( 3 ) 427 - 433 2011.09

Joint Work, Accepted

Sex difference in human fingertip recognition of micronlevel randomness as unpleasant.

Masashi Nakatani, Tomoyuki Kawasoe, Mitsuhiro Denda

International Journal of Cosmetic Science 33 ( 4 ) 346 - 350 2011.08

Joint Work, Accepted

Wearable contact force sensor system based on fingerpad deformation

Masashi Nakatani, Kouzo Shiojima, Satoshi Kinoshita, Tomoyuki Kawasoe, Kazumi Koketsu, Jun Wada

IEEE World Haptics    323 - 328 2011.06

Joint Work, Accepted

Surface texture can bias tactile form perception

Masashi Nakatani, Robert D Howe, Susumu Tachi

Experimental Brain Research 208 ( 1 ) 151 - 156 2011.01

Joint Work, Accepted,  ISSN  0014-4819

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Finite Elemental Analysis on Tactile Recognition of Indented/Raised Surface in Human Fingerpad

Shinmi Takayuki, Nakatani Masashi, Makino Yasutoshi, Maeno Takashi

Transactions of the Virtual Reality Society of Japan (THE VIRTUAL REALITY SOCIETY OF JAPAN)  16 ( 3 ) 427 - 433 2011

ISSN  1344-011X

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The hand fingerpad is one of the sensitive parts in human body. It can detect the surface features such as bumps and holes very quickly. However, the algorithm how we recognize such surface features in the brain has not been well studied. This study investigates human surface form recognition in terms of both psychological shape recognition performance for surface features and mechanical deformation produced by surface features. We utilized the finite element model of fingerpad which mimics the anatomical structure of finger tissue, and calculated the mechanical deformation in contacting indented or raised surface. We analyzed the deformation pattern in terms of the strain energy density in the locations where Merkel cells are typically observed. By comparing previous study on the human surface form recognition performance in fingerpad, we propose tactile recognition algorithm for identifying whether the surface form is raised or indented. The outcome of this research is not only valuable for comprehending the tactile recognition algorithm in human, but also insightful for developing tactile sensors which enables to detect surface form features.

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Sex difference in human fingertip recognition of micron‐level randomness as unpleasant

M Nakatani, T Kawasoe, M Denda

International journal of cosmetic science 33 (4), 346-350  2011

Acceleration of permeability barrier recovery by exposure of skin to 10-30 kHz sound

Mitsuhiro Denda, Masashi Nakatani

British Journal of Dermatology 162 ( 3 ) 503 - 507 2009.09

Joint Work, Accepted

高密度ピンマトリクスを利用した触覚ディスプレイのピン径・ピン間隔と形状認識率の基礎検討

仲谷正史，川上直樹，舘暲

日本バーチャルリアリティ学会論文誌 14(2009) ( 3 ) 395 - 398 2009.09

Joint Work, Accepted

Haptic localizations for onset and offset of vibro-tactile stimuli are dissociated

Junji Watanabe, Masashi Nakatani, Hideyuki Ando H, Susumu Tachi

Experimental brain research 193 (3), 483-489 193 ( 3 ) 483 - 489 2009.03

Joint Work, Accepted,  ISSN  0014-4819

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