Validity of perceived skin wettedness mapping to evaluate heat strain

2011 ◽  
Vol 111 (10) ◽  
pp. 2581-2591 ◽  
Author(s):  
Joo-Young Lee ◽  
Kouhei Nakao ◽  
Yutaka Tochihara
Keyword(s):  
Author(s):  
Somayeh Bolghanabadi ◽  
◽  
Aliakbar Mohammadi ◽  
Baharam Kohnavard ◽  
Mohamadbagher Delkhosh ◽  
...  

Author(s):  
Juliane Kemen ◽  
Silvia Schäffer-Gemein ◽  
Johanna Grünewald ◽  
Thomas Kistemann

The transdisciplinary project “Heat-Health Action Plan for Elderly People in Cologne” addresses the most heat-vulnerable risk group, people over 65 years of age. A quantitative study aimed to better understand heat perception and coping strategies of elderly people during heat waves to inform heat-health action plans. We conducted a representative quantitative survey via structured interviews with 258 randomly chosen people over 65 years old, living in their own homes in four areas of Cologne, Germany. These areas varied, both in terms of social status and heat strain. Data regarding demographics, health status, coping strategies, and heat perception were collected in personal interviews from August to October 2019. The majority of the participants perceived heat strain as moderate to very challenging. Women, people with a lower monthly income, and those with a lower health status found the heat more challenging. We found that participants adapted to heat with a number of body-related, home-protective, and activity-related coping strategies. The number of coping strategies was associated with perceived personal heat strain. There is a definite underuse of water-related heat adaption strategies among the elderly. This is of increasing relevance, as rising heat impact will lead to more heat-related geriatric morbidity. Our results are seminal to inform elderly-specific, socio-adapted local heat-health action plans.


Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5549
Author(s):  
Syed Muhammad Ali ◽  
Wan-Young Chung

The transepidermal water loss (TEWL) and the skin wettedness factor (SWF) are considered parts of a key perspective related to skincare. The former is used to determine the loss of water content from the stratum corneum (SC), while the latter is used to determine the human skin comfort level. Herein, we developed two novel approaches: (1) determination of the TEWL and the SWF based on a battery-free humidity sensor, and (2) the design of a battery-free smart skincare sensor device tag that can harvest energy from a near field communication (NFC)-enabled smartphone, making it a battery-free design approach. The designed skincare device tag has a diameter of 2.6 cm and could harvest energy (~3 V) from the NFC-enabled smartphone. A series of experimental tests involving the participation of eight and six subjects were conducted in vivo for the indoor and outdoor environments, respectively. During the experimental analysis, the skin moisture content level was measured at different times of the day using an android smartphone. The TEWL and SWF values were calculated based on these sensor readings. For the TEWL case: if the skin moisture is high, the TEWL is high, and if the skin moisture is low, the TEWL is low, ensuring that the skin moisture and the TEWL follow the same trend. Our smart skincare device is enclosed in a 3D flexible design print, and it is battery-free with an android application interface that is more convenient to carry outside than other commercially available battery-based devices.


Temperature ◽  
2021 ◽  
pp. 1-22
Author(s):  
Anthony A. Fung ◽  
Andy Zhou ◽  
Jennifer K. Vanos ◽  
Geert W. Schmid-Schönbein

2017 ◽  
Vol 58 ◽  
pp. 555-565 ◽  
Author(s):  
Wen Yi ◽  
Albert P.C. Chan ◽  
Francis K.W. Wong ◽  
Del P. Wong

2018 ◽  
Vol 50 (2) ◽  
pp. 299-307 ◽  
Author(s):  
NICHOLAS RAVANELLI ◽  
GEOFF B. COOMBS ◽  
PASCAL IMBEAULT ◽  
OLLIE JAY

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 980
Author(s):  
Hang Shu ◽  
Wensheng Wang ◽  
Leifeng Guo ◽  
Jérôme Bindelle

In pursuit of precision livestock farming, the real-time measurement for heat strain-related data has been more and more valued. Efforts have been made recently to use more sensitive physiological indicators with the hope to better inform decision-making in heat abatement in dairy farms. To get an insight into the early detection of heat strain in dairy cows, the present review focuses on the recent efforts developing early detection methods of heat strain in dairy cows based on body temperatures and respiratory dynamics. For every candidate animal-based indicator, state-of-the-art measurement methods and existing thresholds were summarized. Body surface temperature and respiration rate were concluded to be the best early indicators of heat strain due to their high feasibility of measurement and sensitivity to heat stress. Future studies should customize heat strain thresholds according to different internal and external factors that have an impact on the sensitivity to heat stress. Wearable devices are most promising to achieve real-time measurement in practical dairy farms. Combined with internet of things technologies, a comprehensive strategy based on both animal- and environment-based indicators is expected to increase the precision of early detection of heat strain in dairy cows.


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