Sensory words may facilitate certain haptic exploratory procedures in facial cosmetics / Naomi Arakawa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 1 (02/2021)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° 1 (02/2021) . - p. 78-87 Titre : Sensory words may facilitate certain haptic exploratory procedures in facial cosmetics Type de document : document électronique Auteurs : Naomi Arakawa, Auteur ; Tomoko Watanabe, Auteur ; Kyoko Fukushima, Auteur ; Masashi Nakatani, Auteur Année de publication : 2021 Article en page(s) : p. 78-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Consommateurs -- Attitudes Procédure exploratoire haptique Toucher Toucher -- Langage technique Visage Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Many people want to have healthy facial skin. They tend to check their skin’s condition by touching their face with their hands. In the cosmetic industry, we need to understand what consumers are perceiving in a tactile sense when touching their own facial skin. The purpose of this study was to investigate these observation methods in order to systematically understand people’s haptic exploratory procedures (HEPs). - Methods : Thirty-four participants living in the United States and twenty-two participants living in Japan freely explored their faces and answered which side felt more closely related to the six tactile adjectives. A new analysis was applied to classify the observed HEPs into six classifications within two categories and three sizes of contact area by experts. - Result : It was confirmed that the new task was useful to observe the HEPs for participants from United States and Japan. The US participants’ HEPs for ‘moisturized’ were mainly a middle-sized contact area using a stroking motion. On the other hand, Japanese participants’ HEPs for ‘moisturized’ (‘shittori’ in Japanese) mainly used a pushing movement. Moreover, the US participants' HEPs for 'soft' included both pushing and stroking, but Japanese participants HEPs for ‘soft’ (‘yawarakai’ in Japanese) were again mainly pushing. - Conclusion : This study suggests that the proposed analysis method enables the systematic understanding of HEPs when checking the skin, along with the cross-cultural differences affecting those procedures. These systematic findings could allow cosmetic formulators to have a better understanding of the tactile sensations consumers themselves are feeling in a variety of different global markets. Note de contenu : - MATERIALS AND METHODS : Participants - Tactile adjectives representing skin perception - Stimuli - Procedure - Quantification of haptic exploratory behaviours - Statistical analysis - RESULTS : The total frequency of HEPs towards each tactile adjective - The categories of HEPs toward each tactile adjective - The categories and contact area sizes toward each tactile adjective - Table 1 : 6 adjectives used in the experiment - Table 2 : The viscosity of cosmetics - Table 3 : Haptic exploratory procedure classification criteria in 2 categories and 3 sizes of contact area - Table 4 : Statistical analysis of haptic exploratory procedure categories in the US and Japanese experiments - Table 5 : Statistical analysis of the six haptic exploratory procedures in the US and Japanese experiments DOI : https://doi.org/10.1111/ics.12671 En ligne : https://drive.google.com/file/d/1eNSbS7NekcjUmM61x-ZPy4nwsmGR3nTG/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35446 [article]

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Skin quality sensor to evaluate vibration and friction generated when sliding over skins / Naoki Saito in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 6 (12/2023)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 6 (12/2023) . - p. 851-861 Titre : Skin quality sensor to evaluate vibration and friction generated when sliding over skins Type de document : texte imprimé Auteurs : Naoki Saito, Auteur ; Kohei Matsumori, Auteur ; Taiki Kazama, Auteur ; Saito Sakaguchi, Auteur ; Ryuta Okazaki, Auteur ; Naomi Arakawa, Auteur ; Shogo Okamoto, Auteur Année de publication : 2023 Article en page(s) : p. 851-861 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Frottements (mécanique) Mesure Peau -- Anatomie Peau -- Physiologie Toucher Vibrations (mécanique) Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The mechanical condition and tactile evaluation of skin are essential for the development of skin care products. Most of the existing commercial instruments and studies aim to evaluate the skin surface by pressing it for hardness or by using imaging sensors, but there have been few instrumental measurements employing rubbing motion. Here, we have developed a sensor specialized for tactile sensation and the contact phenomenon during skin rubbing. - Methods : The developed sensor has three features: It can measure body parts including cheeks and arms, automate the rubbing motion of the probe and measure vibration and friction simultaneously. It is hand-held, with metal probes that rub the skin surface while rotating under a motor drive; it has an accelerometer and a force sensor beneath the probe measuring vibration and friction forces. To evaluate the validity of the sensor's measurements, artificial skin models were measured using the developed sensor and commercially available sensors and the results were compared. The relationship between the sensor output, surface roughness measurement and sensory evaluation was also investigated. Additionally, we evaluated the inter-rater reliability when measuring actual skin. - Results : The measurements of five artificial skin models with different surface shapes showed a high correlation (r = 0.99) between the vibration intensity values evaluated by the developed sensor and those measured by a tri-axial acceleration sensor attached to a fingernail. The correlation coefficient between the vibration intensity values and surface roughness was r = 0.91, and the correlation with the sensory evaluation score of roughness was r = 0.99. The friction coefficients measured by the developed sensor and the force plate had r = 0.93, based on measurements of five artificial skin models with different friction conditions. The inter-rater correlation coefficients between the three participants of the developed sensor were as high as 0.92 and 0.94 for the vibration and friction measurements respectively. - Conclusion : The vibration intensities and friction coefficients from the sensor were highly correlated with those of the conventional sensor. The inter-rater reliability was also high. The developed sensor can be useful for tactile evaluation in skin-care product development. Note de contenu : - METHODS : Development of a tactile sensor - Artificial skin model - Friction and vibration measurement using the developed tactile sensor - Friction measurement using the force plate and vibration measurement using the accelerometer attached to finger - Surface roughness measurement of the artificial skin model - Sensory evaluation of the artificial skin model - Friction measurement using artificial skins and skin-care products - Evaluation of intra- and inter-rater reliability - Data analysis - RESULTS : Performance evaluation using artificial skin models - Friction measurement using artificial skins and skin-care products - Evaluation of intra- and inter-rater reliability - Table 1 : Intra-rater reliability ICC (1,1) and inter-rater reliability ICC DOI : https://doi.org/10.1111/ics.12892 En ligne : https://drive.google.com/file/d/1AIXVni-i1KQJzT8CFc3lFjkJDuoIaRfL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40269 [article]

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Talk to us about your skin : The relationship between spoken language and haptic exploratory procedures / Naomi Arakawa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 3 (06/2024)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 46, N° 3 (06/2024) . - p. 437-456 Titre : Talk to us about your skin : The relationship between spoken language and haptic exploratory procedures Type de document : texte imprimé Auteurs : Naomi Arakawa, Auteur ; Tomoko Watanabe, Auteur ; Kyoko Fukushima, Auteur ; Yuko Matsumoto, Auteur ; Masashi Nakatani, Auteur Année de publication : 2024 Article en page(s) : p. 437-456 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Consommateurs -- Préférences Cosmétiques Toucher Tags : 'Différences  culturelles  cosmétiques'  'Efficacité  des  produits'  'Mouvements  mains'  'Evaluation  sensorielle'  'Mots  sensoriels'  'Perceptions  tactiles' Index. décimale : 668.5 Parfums et cosmétiques Résumé : - OBJECTIVE : To enhance satisfaction, the cosmetics industry needs to clearly understand consumers' descriptions of their key tactile preferences. It is difficult for researchers to understand verbal descriptions from people whose native language is different from their own. Previous research has implied that some sensory words with the same lexical meanings have been observed in different haptic exploratory procedures (HEPs). Therefore, our study aims to investigate and understand the key tactile perceptions of people from five different countries based on their descriptions and their HEPs. - METHODS : In Experiment 1, 1545 participants living in the US, Japan, China, Italy, and Thailand described their major tactile perceptions as efficacy in skincare, and we analysed the frequency of each word used in their answers. In Experiment 2, we confirmed the task to observe HEPs for Chinese, Italian, and Thai participants. A total of 24 participants in China, 33 participants in Italy, and 30 participants in Thailand freely explored their faces with their hands and answered which side more closely matched the major tactile adjectives. Experts classified the observed HEPs into six classifications within two categories and three contact area sizes and investigated the cultural differences. - RESULTS : More than 2% of the Chinese, Italian, Thai, US, and Japanese participants described 33, 20, 29, 22, and 18 words, respectively, as efficacy in skincare. Verified words that described the major tactile perceptions in each native language had the same meanings as moistness, firmness, softness, smoothness, and so on. We could confirm the HEPs of these major feelings for the participants from each culture. Chinese and Thai participants' HEPs for moistness or softness were observed with a pressing movement. Conversely, Italian participants' HEPs for moistness or softness were observed with a rubbing movement. - CONCLUSION : This study showed that words with the same lexical meanings evoked different HEPs. The results imply that different HEPs can provide different physical stimuli on the skin. Therefore, it is important to survey both objects and HEPs to better understand the tactile experience. Note de contenu : - MATERIALS AND METHODS : Experiment 1 : Sensory words in different languages as key tactile experience - Experiment 2 : Investigation of HEPs in three countries - RESULTS : Experiment 1 : Sensory words in different languages as an key tactile experience - Experiment 2 : Investigation of HEPs in three countries Référence de l'article : https://doi.org/10.1111/ics.12943 En ligne : https://drive.google.com/file/d/1Ii4Z_x2GgMlIdGjHspZcrPrhEMGbcaQ5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41345 [article]

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