• 한국의류학회지
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• 제43권3호
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• pp.405-415
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• 2019

This study examined the physiological and psychological effects of wearing a winter cap at rest in a cold environment. Seven older males participated in two separate trials: wearing a winter cap (CAP) and non-wearing a winter cap (CON). The experiment was conducted for 60 min in a climatic chamber (air temperature $7.8{\pm}0.3^{\circ}C$ with $43{\pm}2%RH$) with sedentary posture. Microclimate temperature at the vertex of the head was $6.88^{\circ}C$ higher in CAP compared to CON (p<.01). Microclimate humidity at the vertex was lower in CAP than in CON only during the last 5 min (p<.01). Skin temperature at the forehead in CAP was higher than in CON (p<.01). During the last 5 min, rectal temperature was higher in CAP than that in CON (p<.05). Unlike CAP, the heart rate in CON during the last 5 min decreased significantly compared to the initial 5 min (p<.05). Subjects also felt less cold on the head/face in CAP than that in CON (p<.01). The results indicate that wearing a cap for elderly males positively affected body temperature regulation and cardiovascular response in cold environments. The importance of wearing warm hats for elderly males in winter should be emphasized.

• 한국의류산업학회지
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• 제25권4호
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• pp.520-533
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• 2023

The present study developed a test protocol for evaluating the mobility of firefighting chemical and flame personal protective equipment (PPE) for the National 119 Rescue Headquarters in Korea and suggested ergonomic design factors to improve their mobility and performance. Six types of PPE were employed, including three types for flame protective PPE (5 ~ 6 kg excluding the self-contained breathing apparatus), and three types for chemical and flame protective PPE (8 ~ 11 kg). These PPEs are used by the 119 Rescue firefighters. Three male firefighters (34.3 ± 1.2 y in age, 175 ± 8 cm in height, 81 ± 13 kg in body weight) participated in the mobility test and interview. A mobility test protocol consisting of 16 components (nine postures and seven motions including a dexterity test) along with a visibility test were developed based on pre-interviews and literature reviews. The findings indicated that the clothing microclimate humidity on the neck and chest exceeded 85%RH on average for all the six PPE conditions, with the chest area reaching as high as 98%RH. This high humidity caused fogging inside the visor and impaired visibility. The requirements for improving the PPE design in terms of mobility varied depending on whether it was the separated types or all-in-one types, particularly regarding the hood and gloves design. The findings of this study can be applied to improve the design of Level A_PPE for firefighters. The mobility test protocol and visibility test developed in this study can also be applied to other types of Level A impermeable PPE.

• 한국의류학회지
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• 제23권4호
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• pp.499-509
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• 1999

This study was carried out to investigate the effects of wearing disposable diaper with the endothermic agent on thermoregulatory response of infant. Five healthy female infants aged about 5 months were taken as a subject of this experiment. Experimental diapers were six kinds of disposable diaper constructed of nonwoven tissue, fluff pulp, super absorbent polymer, back sheet film, leg elastic, and 0g urea(A) 1g urea(B) , 2g urea(C), 3g urea (D), 4g urea(E) 5g, urea(F) respectively. Urea(98% or over purity) was used as an endothermic agent. Experiment was proceeded while infants were sleeping at 27.5$\pm$0.5$^{\circ}C$, 50$\pm$5% R.H, 0.04m/sec. Each disposable diaper's properties was tested. During the experiment rectal temperature skin temperature of 9 areas temperature inside the disposable diapers were measured, the results were as follows : 1) There was not significant difference among the diapers in absorption capacity retention capacity and rewet(p=0.05). The absorption under load was showed to A, B,

• 한국지역사회생활과학회지
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• 제23권2호
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• pp.137-144
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• 2012

This study was undertaken to develop protective gloves for rose farmers who work on thorny plant in Korea. Prototype of protective gloves was designed and evaluated in terms of thermal comfort and mobility. Gloves were made with arm protectors attached to them, so that they could protect the lower part of arms, and rubber bands were inserted into the arm protectors for them not to slip down. The bending part of each finger was punched in order to give ventilation. Also, the bending parts of the fingers in the upper and lower part of gloves were inserted with sponges and were stitched together in order to enhance gripping movement. According to compared evaluation of the developed gloves and the existing gloves, temperature inside the gloves didn't show any significant differences, but humidity inside the gloves showed significant differences. There were significant differences in terms of comparison of objective mobility, that is, pegboard run-time and grip power, from statistical aspects. In addition, a comparison of subjective discomfort showed significant differences and so the suitability of developed gloves was proved.

• 한국의류학회지
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• 제21권7호
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• pp.1162-1172
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• 1997

The actual thermal environment and bedclimate on Ondol were investigated by the regions and housing styles in each season. The subject were sixty healthy men and women, 30 of them live in apartment, and 30 of them live in detached house. 20 of them live in Wonju, 20 of them live in Cheongju and 20 of them live in Pusan. The results are as follows: 1) The subject slept in this conditions; 23.1$\pm$2.4$^{\circ}C$ and 38$\pm$8.8% RH in spring, 27.1$\pm$1.5$^{\circ}C$ and 68$\pm$6.4% RH in summer, 27.1$\pm$1.7$^{\circ}C$ and 47$\pm$11.1% RH in autumm, and 24.9$\pm$3.3$^{\circ}C$ and 41$\pm$10.7% R.H in winter The temperatures of the floors were 38.6$\pm$5.$0^{\circ}C$ in the spring, 26.7$\pm$1.9$^{\circ}C$ in the summer, 29.4$\pm$4.7$^{\circ}C$ in the autumm, and 30.0$\pm$5.8$^{\circ}C$ in the winter. 2) Each thickness of the quilts was thinner in the summer than in any other season, but the differences in the thickness of each mattress was not significant by the seasons. 3) The differences of the bedclimate and the clothing microclimate were significant by the regions and housing in each seasons. The inside of temperature and humidity of sleepwrar were highest in summer. The bedclimate showed high correlation with the clothing microclimate. 4) The differences in the sensation which the subjects felt about temperature and comfort of the bedroom conditions were not significant by the seasons, regions, or housing styles. But the subjects felt more humid in the summer and spring than in the autumm and winter.

• 한국의류학회지
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• 제37권8호
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• pp.1060-1074
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• 2013

This study measured and analyzed pressure at each measurement part of imported compression stockings sold in Korea to provide basic information to establish a pressure standard and grade ranking. This study used 40 medical compression stockings imported from 6 countries. Pressure measurements were taken at 11 points: front side and back side of ankle, end-point of the gastrocnemius muscle, front, inner side, back, and outer side of calf, back side of below knew girth, inner side, and outer side of mid-thigh girth, and inner side of thigh girth. AMI 3037-10 and AMI 3037-2 were used for measurements taken inside an environmental chamber at a temperature of $21^{\circ}C$ and a relative humidity (RH) of 65%. For the measurements, 11 air pack sensors were attached to a wooden model leg (Hohenstein) and three measurements were taken at each measurement point in three minutes. The average of these measurements was used for analysis. The findings of this study were as follows. As for the front side of the ankle, of the 40 products, 14 products (6 USA, 2 Swiss, 3 Italian, and 2 Taiwanese) were within the pressure range indicated on the product label; however, no German products fell within the pressure range. A total of 8 products (5 USA, 1 Swiss, 1 Italian, and 1 German) were gradient compression type; however, no Japanese or Taiwanese product were of this type. The majority of products had the highest pressure at the end-point of the gastrocnemius muscle. Only 3 products, 1 USA (Jobst Opaque 30-40mmHg), 1 Swiss (Sigvaris Cotton 34-46mmHg) and 1 Italian (Jobstocking 25-32mmHg), had measurements that met the indicated standard pressure, were a gradient compression type, and met the overall standard for compression stockings.

• 한국전자통신학회논문지
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• 제17권4호
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• pp.729-738
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• 2022

기존의 옷장은 단순한 의류를 보관하는 용도로만 사용되어 왔었다. 단순히 옷들을 보관하는 기능만 있기 때문에 습도나 온도 같은 환경을 조절하려면 따로 제습제 등의 물품을 구매해서 비치하는 방법밖에 없어 불편함이 있었다. 본 논문에서는 기존 옷장에서 편의성을 증대시켜 자동으로 온습도 조절 및 여러 편의 기능에 대한 것을 추가하였으며 기능을 효율적으로 동작 시키기 위하여 실험을 통하여 기능을 동작 시키기 위한 센서의 위치를 정하였고 여러 편의 기능과 실험 데이터를 기반으로 센서를 설치한 옷장 개발과 더불어 최근 다년간 성장한 스마트 홈 시장과 스마트 폰 애플리케이션 시장의 흐름에 맞춰 옷장과 스마트폰의 블루투스 페어링을 통한 옷장 내부의 온습도 조절 기능 및 다른 기능을 스마트폰을 사용하여 사용자에 맞춘 의류선택기능과 애플리케이션 내의 날씨 데이터를 통해 옷장 내부의 옷을 날씨에 맞는 코디 추천 기능 등의 편의 기능을 구현하고자 한다.

• 한국의류학회지
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• 제31권6호
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• pp.955-965
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• 2007

안전모는 다양한 산업현장에서 머리 보호를 위해 착용되는 보호구로 법적으로도 착용이 의무화되어있다. 그러나, 안전모 착용에 따른 불쾌감 및 생리적 부담은 작업자들이 착용을 꺼려하는 주된 원인이 된다. 본 연구에서는 이 문제를 해결하기 위한 하나의 방안으로 안전모에 냉매팩을 삽입하는 방법을 제안하였고, 동시에 냉매팩 삽입으로 인한 안전모의 무게 증가가 인체생리반응에 미치는 영향을 규명하고자 하였다. WBGT $33{\pm}1^{\circ}C$의 환경에서 인체착용평가 방법을 이용하여, 4가지 실험조건으로 안전모 착용시의 인체 생리반응을 조사하였고, 그 결과는 다음과 같다. 첫째, 안전모만 착용 시(OH)와 안전모 미착용시(NH)를 비교해 보면, 안전모 착용 시에 평균피부온, 직장온, 심박수, 발한량 등이 통계적으로 유의하게 높았고, 주관적인 감각에서도 더 덥고, 더 습하며, 불쾌하고 주관적으로도 힘들다고 느끼는 것으로 나타났다. 둘째, 냉매팩 삽입시의 경우(HA, HB), 냉매팩의 종류에 따라 여러 인체생리반응에 차이를 보였으나, 안전모만 착용한 경우(OH)와 비교 시 안전모내 기후, 발한량, 직장온 상승도, 열저장(heat storage) 등이 더 낮았다. 한서감과 쾌적감에서는 냉매팩 종류에 따라 다른 경향을 보였다. 본 결과를 통해 안전모 착용시의 생리적, 주관적 부담 정도를 객관적으로 파악할 수 있었으며, 안전모에 냉매팩을 삽입하는 방법을 서열 스트레스를 경감시키는 하나의 방법으로 제시할 수 있었다. 추후 연구에서는 냉매팩의 무게, 피복면적, 성분 등을 고려해야 할 것이며, 본 결과가 서열 환경에서 안전모를 착용하고 작업하는 여러 산업 근로자에게 도움이 되기를 기대한다.

• 한국의류학회지
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• 제16권4호
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• pp.405-416
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• 1992

This study was performed to investigate correlation between total body weight loss and local sweat rate and to find out any possible method that can estimate total body weight loss judging from local sweat rate. Twelve adult females were kept at 44 $\pm1^{\circ}C$, 50 ${\pm}5\%$ R.H. (1) Physiological responses such as total body weight loss, local sweat rate, rectal temperature, skin temperature, blood pressure and pulse, (2) micro climate inside garment and (3) subjective sensation were examined. Two types of garment such as long-sleeves with long pants (Type I) and half·sleeves with short pants (Type II) were used to observe the effect of garment types on sweating response. Both clothing weight was equal (132$\pm$3 g/$m^{2}$). The results were as follows: 1. Regardless of the different types, total body weight loss was more interrelated with the sweat rate on forehead than any other parts of the body. Except the forehead, different parts of body with different types of garment influenced on body weight loss quite differently. 2. Total body weight loss was more interrelated with the weight gain of garment than the local sweat rate. 3. Under the environment of 44$\pm1^{\circ}C,\;50{\pm}5\%$R.H., body weight loss during 1 hour of subject clothed and silted was 275.2 g/hr and weight loss per body surface area was 178.9 g/$m^{2}/hr$ Garment types have no influences on total body weight loss. 4. Local sweat rate (mg/7.07 $cm^{2}/hr$) was 208.0,191.0, 133.0, 115.0,81 0, 75.1 and 66.3 on scruff, breast, forehead, forearm, thigh, upper arm, leg respectively No evidence has been found that garment types influenced on local sweat rate (p<0.1). 5. No interrelationships between rectal temperature and total body weight loss, local skin temperature and total body weight loss, and local skin temperature and local sweat rate were found. From this study, some possible method that we can estimate total body' weight loss judging from weight loss of garment. But considering the fact that clothing design factor, the physical characteristics of fabric and environmental factor such as humidity and wind velocity should be concerned in weight loss of garment, it should be studied further whether the total body weight loss can be estimated properly from the weight loss of garment. This experiment suggest that different parts of body with different types of garment can influence on body weight loss quite differently. Therefore, in order to get more precise results, more studies under the diversity of garment types should be done in the near future.

• 대한인간공학회지
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• 제35권5호
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• pp.343-359
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• 2016

Objective:In this study, we designed working clothes for livestock farmers to wear in spring and autumn to improve their work efficiency, conducted a physiological test on their performance, and evaluated their comfort. Background: In recent years, livestock farming in Korea has expanded, yet farmers' safety and sanitation levels remain low in hazardous environments that include organic dust, toxic gas, and heat stress, as well as the risk of accidents. Furthermore, most livestock farmers wear ordinary or dust-resistant clothes that are unsuitable for rearing livestock and compromise their safety and health. Thus, it is important to design specialized working clothes for livestock farmers that are comfortable and that minimize their health and safety risks. Method: To this end, we examined the literature on livestock (poultry, swine, and cattle) farmers' safety and sanitation issues, designed appropriate working clothes, and tested them in terms of sensory feel, physiological response, and subjective comfort. Results: The respondents expressed satisfaction with the new working clothes. The results of a physiological test showed a decline in temperature and humidity inside the clothes, a lower pulse rate, and a lower oxygen intake compared to the measurements taken when famers wore their previous working clothes. This indicates a fall in heat stress and fatigue, which was mostly consistent with the results of the assessment of subjective comfort. Conclusion: The results of the analysis show an improvement in the comfort of the new working clothes compared to the dust-resistant clothes that are widely worn. Based on this study, the new working clothes need to be further tested and evaluated to improve the design. Application: This study is expected to contribute to designing better working clothes for livestock farmers.