• 한국의류학회지
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• 제28권2호
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• pp.292-302
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• 2004

The purpose of this study was to evaluate thermal properties of lab gowns developed from the point of safety and work efficiency. We evaluated thermal and subjective responses of subjects wearing functional new lab gowns (Type B, C, D) and a popular lab gown on the market (Type A). Type B was a new lab gown made of woven fabric with functional cuffs. Type C was a new apron made of woven fabric with arm protectors. Type D was a new lab gown made of non-woven material with functional cuffs and openings around the armpits. Temperature in the climatic chamber was set at 19$^{\circ}$C as an indoor temperature in winter and at 24$^{\circ}$C in summer. There were no significant differences in rectal temperature and heart rate among four types of gowns and between two air temperatures for 120 min. Mean skin temperature was much higher in the type A and B than in He type C and D (p .05). In the 19$^{\circ}$C air, clothing microclimate temperature on the back was the highest in the type B and was the lowest in the type C (p .05). Clothing microclimate humidity was not significant differences among gowns. In subjective .esponses, subjects perceived that Type B was the warmest gown in the 19$^{\circ}$C and the hottest and more humid in the 24$^{\circ}$C than other gowns. Inversely, type C was the coolest gown among four gowns. Both in the 19$^{\circ}$C and in the 24$^{\circ}$C, the Type D had gained most responses of being comfortable. In conclusion, the temperature difference of 5$^{\circ}$C was more of an influencing factor than the difference from four types of lab gowns. Secondly, we recommend the manufacturers to make lab gowns with functional cuffs for safety purposes. Thirdly, the spread of the type of apron with arm protector will contribute to increase of the frequency of wearing in summer. Fourthly, it is necessary to study continuously about lab gowns with non-woven materials for researchers exposed to toxic chemical and biological materials.

• 인지과학
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• 제29권4호
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• pp.221-241
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• 2018

선행연구들은 사회적 배제를 경험한 사람은 체온과 환경온도 지각이 낮아지고, 이를 보충하기 위해 따뜻한 음료나 따뜻한 물 샤워 같은 물리적 따뜻함을 추구함을 관찰해왔다. 본 연구는 이러한 선행연구의 결과를 색 감성 혹은 색 상징의 차원으로 확장하기 위한 목적에서 이루어졌다. 이를 위해 사람들에게 따뜻한 색 혹은 차가운 색을 입힌 인물 사진을 보여준 후, 해당 인물에 대한 호감을 평가하게 할 때, 사회적 배제 지각에 따라 호감이 달라지는지 네 가지 실험을 통해 확인하였다. 결과적으로 사회적 배제를 지각한 사람은 따뜻한 색과 연합된 인물에 대한 호감이 차가운 색과 연합된 인물에 대한 호감보다 강했지만, 사회적 배제를 지각하지 않은 사람들은 두 색에 연합된 인물에 대한 호감에 차이가 없었다. 본 연구는 심리적 손실을 외적 목표 추구를 통해 상쇄하려 한다는 보충가설을 물리적 차원에서 감성적, 상징적 차원으로 확장했다는 측면에서 중요하다. 또한 심리상담소와 같은 사회적 배제를 경험한 사람들을 치료하는 현장에 따뜻한 감성이 필요함을 제안한다는 측면에서도 시사점을 가진다.

• 한국의류학회지
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• 제20권4호
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• pp.697-706
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• 1996

The actual conditions of bed climate are investigated depending on the regions and housing styles used on ondol in autumn and winter. Sixty healthy men and women (30 of them live in apartmrnt and 30 of them live in detached house, 20 of them live in Wonju, 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) No significant differences was shown between the seasons of bedclothes thickness. 2) In the autumn, the temperature and humidity of bedroom, on the mattress, inside the bedquilt, and inside the sleep-wear were higher than those in the winter. The temperature of ondol floor and under the mattress in winter were higher than those in the autumn. 3) The differences of the temperature and humidity of bedroom, the bed climate, and the clothing microclimate were significant by the regions and housing styles in both seasons. In both seasons, the temperature of bedroom, on the mattress, inside sleep-wear in the apartment were higher than those in the detached house. 4) The differences of subjective sensation on the bedroom conditions were not significant by the sextons, the regions, and the housing styles. Most subjects perceived that the conditions of bedroom were somehow hot and dry, but comfortable.

• 한국재료학회지
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• 제12권10호
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• pp.791-795
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• 2002

We studied the physical properties of $Co_3$$O_4$-added Ni-Zn ferrite which were sintered at 1050~110$0^{\circ}C$ for 2 hours. X-ray diffraction showed a spinel structure, and optical microscopy showed grain sizes of 5 to 10 $\mu\textrm{m}$. As the sintering temperature was increased from $1050^{\circ}C$ to $1070^{\circ}C$, the initial permeability and magnetic induction increased, and both of the loss factor and the coercive force decreased. The Curie temperatures were about $^234~245{\circ}C$ with added $Co_3$$O_4$. The initial permeability was 350 to 420 and maximum magnetic induction density and coercive force 4870G to 4980G and 0.15 Oe to 0.21 Oe, respectively which were similar to those of Ni-Zn ferrite synthesized in the conventional process. The frequency of specimen was in the range of 1MHz to 300MHz. In the plot of initial permeability vs. frequencies, a $180^{\circ}C$ rotation of the magnetic domain could be perceived in a broad band of microwave before and after the resonance frequency.

• 한국간호교육학회지
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• 제9권1호
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• pp.64-72
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• 2003

Purpose: The purpose of this study was to identify changes in nurses' image of student nurses before and after their first clinical practice. Method: Study samples were composed of 78 student nurses who were from nursing dept. of one college in G city. All participants had their first clinical practice for 4 weeks at two general hospitals in Gwangju. The internal consistency of the total scale was Cronbach's $\alpha$= .883. Results: After the first clinical practice, the mean score of nurses' image in general was lower than that of nurses' image before the clinical practice. In five subcategories, before the first clinical practice, professionalism and expertness were the highest followed by role performance, vision of a career, and temperature as a nurse in order but after the first clinical practice, professionalism was the highest score followed by expertness, temperature as a nurse, role performance, vision of a career in the mean scores of nurses' image. Conclusion: Based upon these findings, clinical practice will play an important role in improving role performance and vision of a nursing career for student nurses, so nursing administrators should make efforts to improve image of nurses in a variety of practice.

• 한국식품조리과학회지
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• 제7권4호
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• pp.51-61
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• 1991

Physical and chemical properties of glycosylsucrose were characterized as follows: 1. The moisture content of glycosylsucrose syrup (35% , w/w) was 63.6% and total sugar in solid was 35.9%. 2. Main sugar compositions of glycosylsucrose syrup were maltotetraose 54.5%, sucrose 18.0%, glycosylsucrose 15.3%, maltosylsucrose 11.3% and the content of glucose, maltose, maltotriose and fructose were very little. 3. Perceived sweetness threshold of glycosylsucrose was 0.71%, relative sweetness was 0.53, and sweetness intensity expressed as power function was S=$0.78^{\circ}$C^{1.5}$$. 4. Viscosity of glycosylsucrose was higher than that of sucrose and Japanese product at 10, 25, 35 and $65^{\circ}C$. 5. The content of water absorption of gylcosylsucrose at Aw 0.80 was 0.48 g $H_2$O/g dry weight while that of sucrose was 0.17g $H_2$O/g dryweight at Aw 0.86. 6. The stability of glycosylsucrose was decreased by acidic pH, high temperature and long heating time. 7. The glycosylsucrose showed very little browning when heated with pepton, but alkaline pH (pH8), high temperature and long heating time increased browning reaction.

• Advances in materials Research
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• 제5권2호
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• pp.121-130
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• 2016

In an attempt to reach a balance of performances in homo-polypropylene based system, the effects of single and hybrid reinforcements inclusions comprising calcium carbonate nanoparticles (2, 4 and 6 phc) and glass fibers (10 wt.%) on the mechanical and thermal properties were investigated. Different samples were prepared by employing twin-screw extruder and injection molding machine. In morphological studies, the uniform distribution of glass fibers in PP matrix, relative adhesion between glass fibers and polymer, and existence of nanoparticles in polymer matrix were observed. $PP/CaCO_3$ (6 phc) as compared to pure PP and PP/GF had superior tensile and flexural strengths, impact resistance and deformation temperature under load (DTUL). $PP/GF/CaCO_3$ (6 phc) composite displayed comparable tensile and flexural strengths and impact resistance to neat PP, while its tensile and flexural moduli and deformation temperature under load (DTUL) were 436%, 99% and $26^{\circ}C$greater respectively. The maximum impact resistance was observed in $PP/CaCO_3$(6 phc). The highest DTUL was perceived in PP hybrid nanocomposite containing 10 wt.% glass fiber and 4 phc $CaCO_3$ nanoparticle.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.188-189
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• 2020

In the field of architecture, concrete and steel bars are the most common and popular combinations. The relationship between the two in a structure is a complementary good that increases in utility when consuming both materials at the same time. However, the combination of the two, which has been perceived as semi-permanent, often faces repairs or reconstruction without its lifespan reaching decades. There are a number of deterioration factors at work for the reason for this phenomenon. Among them, the neutralization of concrete in particular refers to the process in which calcium hydroxide inside concrete reacts with carbon dioxide and loses alkalinity, which creates a corrosive environment for rebars inside concrete, causing serious damage to concrete. In this study, we intend to use a multi-physical analysis program using finite element analysis method to analyze the degree of carbonation according to the internal temperature and concentration of carbon dioxide in concrete, thereby contributing to the prediction of long-term neutralization of concrete and the research related to measures for neutralization of concrete.

• 한국화재소방학회논문지
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• 제26권5호
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• pp.8-12
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• 2012

본 연구는 소방공무원이 착용하는 소방용 공기호흡기(SCBA)가 신체에 미치는 영향을 분석하여 소방공무원의 안전을 위한 기초자료 제공을 목적으로 한다. 연구결과 소방용 공기호흡기를 착용한 경우가 반바지를 입은 경우보다 평균피부온도(7 %), 심박수(28 %), 운동자각도(65.4 %), 대사당량(70.7 %) 등이 통계적으로 유의하게 높게 나타났으며(p<.05), 호흡수는 유의하지 않았다. 이상의 연구결과 소방용 공기호흡기의 착용은 신체에 과중한 부담을 미치는 것으로 판단된다.

• Tribology and Lubricants
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• 제11권2호
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• pp.1-7
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• 1995

Viscosity index is an arbitray number used to characterize the variation of lubricant viscosity with respect to temperature. It is well recognized in the oil industry that as refining severity increases, lubricant VI increases. Consequently, VI is often perceived as a measure of lubricant quality. Futhermore, a 95 VI minimum specification is commonly imposed in marketing base stocks. These factors provide the incentitive for this study to carefully analyze VI definition and two component viscosity blending techniques to investigate how they affect VI change, and finally to examine possible avenues to produce 95+VI base stocks by blending sub-95 VI base stocks.