• 한국의류학회지
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• 제17권2호
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• pp.301-306
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• 1993

Since the underquilt has an important role of supporting the human body in sleeping, it needs to sustain ample degrees of hardness, elasticity, humidity absorption, and warmth retention property and also to have the two ergonimical requirements : It should not be too soft to allow human bodies to sink in, and that it should be comfortable for humans to tum over in sleeping. This study aims to investigate the effect of the thermal insulation of the variation in weight applied to the underquilt. For this purpose, six items were selected as filling materials for the underquilt : cotton, wool, silk, down, polyester, cotton/ployester. Various weights were applied to each of the underquilts to survey the reduction tendency of its thermal insulation effect. The results are as follow : 1. The Thermal insulation effect of each underquilt decreased in an exponetial function as the weight on the underquilt was increased. 2. The thermal reduction curves according to the load weight insrease were shown to be constant in shape regardless of the weight increase. 3. At the weight of more than $25kg/m^2$ the degree of the thermal insulation effect of each underquilt was found to be in order of down>cotton>silk>polyester>wool>cotton/ployester. 4. The variation in load weight applied to each underquilt was shown to be in reverse correlation with the thermal insulation effect. An estimated regression formula can be made on the data.

• 설비공학논문집
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• 제19권4호
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• pp.307-312
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• 2007

This study was performed to evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of sleep efficiency and MST under four thermals conditions ($22^{\circ}C,\;24^{\circ}C,\;26^{\circ}C,\;30^{\circ}C$). Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. Their age was from 20 to 22 years old. They were healthy, and had regular sleep with consistent bed and wakeup time. It was checked whether they had a good sleep before the night of experiment. Experiments were performed in an environmental chamber using thermo-hygrostat. The physiological signal (EEG) for sleep stage were obtained from C3-A2 and C4-Al electrode sites. Sleep stages were classified, then SWS latency and SWS/TST were calculated for the evaluation for sleep efficiencies on thermal conditions. As results, mean skin temperature for comfort sleeping was $34.5{\sim}35.4^{\circ}C$. Considering sleep efficiency and mean skin temperature, indoor room temperature of upper limit was $28.1^{\circ}C$.

• 동력기계공학회지
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• 제11권3호
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• pp.29-34
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• 2007

Existent researches about indoor thermal environment have been focused on to seek human's comfort in daytime. Also researches about thermal comfort during the sleeping time that is important for resting and recharging to modern people have been seldom existed. At present, as global warming phenomenon is being continued, most people are going through inconvenience by sultriness during the sleeping hours in sweltering summer night. Therefore we need another control method of an air conditioner to keep human's thermal comfort. Ambient temperature is a common factor of the environment, but analysis of its effect on human body physiology is still unknown. The effect of ambient temperature on human sleep has been increasingly studied in the last decade. This research investigated about optimal indoor temperature to maintain proper skin temperature and comfortable sleep when indoor air is cooled by an air conditioner in sweltering summer night.

• 재활간호학회지
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• 제13권2호
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• pp.97-104
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• 2010

Purpose: This study was to investigate difficulties in daily activities and tingling from patients having treatment of FOLFOX chemotherapy after colon resection. Method: This study included 103 patients hospitalized for FOLFOX chemotherapy in one of the university affiliated hospital from August 1, 2008 through September 30, 2009. Data were collected using the questionnaire comprised general symptoms, tingling, difficulties in daily activities and coping behavior. Using the SPSS 14.0 program, data analytic methods include Chi-Square test, ANOVA, Scheffe's test. Results: The tingling sensation occurred in hands, feet, mouth, throat. Contacts with cold objects and the number of chemotherapy cycle worsen tingling sensation. Patients experienced difficulties in daily activities such as personal hygiene, kitchen work, eating cold food, sleeping cold, using fine motors like button up, writing, or using knife. The coping behavior included drinking warm water, sleeping warm, using gloves and socks, wearing comfortable shoes, massaging hands and getting help from supporters. Conclusion: An educational guideline for promoting coping behavior to relieve tingling sensation and difficulty in daily living in patients with FOLFOX chemotherapy is needed.

• 한국의류학회지
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• 제16권3호
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• pp.285-298
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• 1992

In this study, bedclimate was investigated depending on various bedquilts used oin ondol in summer. The environmental room condition was maintained at 26: $1^{\circ}C,\;75{\pm}3\%$ R.H., while the ondol surface was kept at $25{\pm}1^{\circ}C$ without heating. The types of bedquilts were hemp, cotton, quilt made of polyester padding with polyester/cotton cover. Two healthy young women were subjected for seven hours' sleep with two replications for this study. The results are as follows. 1) The range of the temperature under the mattress ($25.2\~32.4^{\circ}C$) was lower than that of the temperature on the mattress ($28.8\~35.5^{\circ}C$), or that of the temperature inside the bedquilts ($30.3\~34.4^{\circ}C$). The humidity inside the bedquilts increased during sleeping, and the range of R.H. was $58\~80\%$. 2) The ranges of bedclimate which subjects feel comfortable were $30.5\~33.8^{\circ}C$ on the mattress, $31.0\~34.9^{\circ}C$, $61\~74\%$ R.H. inside the bedquilts. At this range, the mean skin temper-ature of the subjects was $34.3^{\circ}C\~35.2^{\circ}C$. 3) When there was no heating, the weight of the bedding increased during sleeping, and the weight increase was largest in the case of mattress. 4) There were correlations among the skin temperature of three points of the body (abdomen, thigh, foot) and the temperature and R.H. inside the bedquilt. 5) The effect of the type of bedquilts on the microclimate and physiolosical responses were significant. 6) Generally, when there was no heating, the body heat was transferred to the ondol floor, in summer, heat was transferred mostly through the mattress.

• 설비공학논문집
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• 제18권1호
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• pp.1-6
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• 2006

This study was performed to evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of EEGs and MST under four thermals conditions. Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. Their age was from 20 to 22 years old. They were healthy, and had regular sleep with consistent bed and wakeup time. It was checked whether they had a good sleep before the night of experiment. Experiments were performed in an environmental chamber of $4.1\times4.9\times2.7m$ size. EEGs were obtained from C3-A2 and C4-Al electrode sites. Sleep stages were classified, then TST, SWS latency and SWS/TST were calculated for the evaluation for sleep efficiencies on thermal conditions. As results, it was concluded that indoor thermal environments of $24\~26^{\circ}C$ was the best for comfortable and deep sleep.

• 설비공학논문집
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• 제18권7호
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• pp.535-540
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• 2006

This study was performed In evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of Physiological signals under variations in thermal conditions. Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. It was checked whether they had a good sleep before the night of experiment. EEGs were obtained from C3-A2 and C4-A1 electrode sites and EOGs were acquired from LOC (left outer canthus) and ROC (right outer canthus) for REM sleep detection. Sleep stages were classified, then TST (total sleep time), SWS (slow wave sleep) latency and SWS/TST were calculated for the evaluation of sleep efficiencies on thermal conditions. TST was defined as an amount of time from sleep stage 1 to wakeup. SWS latency was from light off time to sleep stage 3 and percentage of SWS over TST was calculated for the evaluation of sleep quality and comfort sleep under thermal conditions. As result, the condition which raise a room temperature provided comfortable sleep.

• 한국주거학회논문집
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• 제17권1호
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• pp.19-27
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• 2006

This research deals with the residential environment for the elderly and describes characteristics to give a positive effect on elderly's health and quality of life in Sweden. Five elderly care home recommended by a municipality staff in Stockholm are surveyed on $01\~03$ October 2003. The results of this study are as follows: 1) homelike atmosphere is regarded as a basic design concept and is applied to size, materials, scale, color, and furniture of elderly housing in Sweden, 2) regarding of the exterior features, it is similar to the ordinary house rather than institution building, 3) arrangement of spaces is planned for several small groups consisting of 6-8 residents, 4) open-space planning on public kitchen and dinning room allows residents to feel comfortable when they can hear a sound and smell a meal, 5) private flat is to provide amenities for sleeping, rest, storage, social interaction, meals, hygiene and other every activities

• 한국가구학회지
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• 제27권1호
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• pp.35-42
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• 2016

With radical increase in one-person households, the consumption market in Korea has also rapidly changed. In line with this movement, customized furniture for sing lecustomershas been recently introduced. Since sleeping more than eight hours a day is needed to maintain a healthy lifestyle, a suitable bed for a comfortable sleep is an essential product for single consumers. In order to respond to this trend, a study was conducted to examine the surface materials of a bed designed for singles. A complete enumeration survey was implemented for beds manufactured by ACEBED Co., Ltd., Simmons-k, Co, Ltd,. Keumsung Bed, Hanssem Co,. Ltd., Hyundai Livart Co,. Ltd,. Emons Furniture Co,. Ltd,. and Borneo International Furniture Co., Ltd. This study helped in the proper selection of surface materials that may be used in the development of furniture for single consumers.

• 사물인터넷융복합논문지
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• 제8권6호
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• pp.27-33
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• 2022

수면은 건강한 삶을 사는데 필수적 요인이나 많은 현대인들이 수면상태의 불편함을 호소하고 있다. 이러한 사람들을 위해 수면상태를 간단하게 평가하고 관리할 수 있는 수단의 필요성이 높아지면서 검사자의 모니터링 없이 집에서 수면 상태를 검사 할 수 있는 기기들이 개발되고 있다. 본 사용성 평가의 대상인 스마트 수면 안대는 잠을 잘 때 생체신호 모니터링을 제공하여 수면 상태를 스스로 편리하게 측정하고 관리할 수 있도록 해준다. 스마트 수면 안대의 사용성과 안전성을 평가하여 발생할 수 있는 사용오류에 관한 잠재적인 요인을 찾아내어 방지하고 본 제품의 사용감과 안전성을 발전시켜 해당 기기의 보급과 개발을 위한 지침을 제시하고자 하였다. 수면안대 시제품을 형성평가를 시행한 결과, 전원 켜기, 결과 확인이 어렵다는 의견과 수면 안대 착용감이 좋지 않다는 의견이 있었고 수면안대 크기과 무게에 대해 연령별로 다른 의견이 제시되었다.