• 한국의류산업학회지
• /
• 제10권5호
• /
• pp.683-689
• /
• 2008

The purpose of this study was to investigate physiological responses such as rectal temperature, skin temperature, micro climate, sweat rate and subjective sensations using cold protective clothing with five different clo value. The clo value was measured by thermal manikin in windless condition. Healthy five 20's males volunteered as subjects for wearing trial experiment. The climate chamber was controlled at $50^{\circ}C$, 65% RH. The experiment consisted of repeated exercise and recovery periods. We found that the higher clo value has, the higher mean skin temperature, micro climate and sweat rate show. They felt warm and wet with higher insulation clothing. Thermal comfort increased in the last recovery period after exercise. There was significant difference between five cold protective clothing. In correlation analysis of clo value, it showed that correlation coefficient(r) values were more than 0.8. Therefore, in terms of clothing insulation, we found that correlation between thermal manikin experiment and wearing trial experiment was high. Clothing insulation could be variable according to many factors such as body movement, covering area, clothing gap, layering and design. Considering the body movement, we thought that insulation measurement need to carry out both thermal manikin experiment and wearing trial experiment.

• Journal of Radiation Protection and Research
• /
• 제19권2호
• /
• pp.109-120
• /
• 1994

원자력시설의 비상사태 시 주변주민을 보호하기 위한 비상대응행위의 효과를 평가할 필요가 있다. 비상대응행위는 지역특성과 개인 행동특성에 따라 매우 다양하게 나타날 수 있으므로, 비상대응행위를 나타내는 변수들은 특정 값을 갖기보다는 일정구간에 분포되는 값을 갖는다. 대부분의 기존 비상대응모델에서는 계산을 단순화시키기 위하여 가정을 통해 특정 값을 사용한다. 단순화 과정중에 필연적으로 정보의 손실이 발생되어 결과적으로 비상대응 모델은 큰 불확실성을 포함하게 된다. 피지이론은 변수의 불확실성을 계산에 포함시켜 엄밀한 계산을 통해 정보손실을 최소화시키면서 계산결과를 얻어낼 수 있는 수학적인 도구를 제공해 준다. 본 연구에서는 퍼지집합, 퍼지추론, 퍼지관계 등의 이론을 응용하여 원자력시설의 비상사태 시 비상대응효과를 평가할 수 있는 방법을 개발하였다. 개발된 모델의 장점은 언어변수를 이용하여 지역특성을 표현하고 전문가의 의견을 반영하여 비상대응효과를 평가하므로, 단순화 가정중에 유발되는 정보의 손실을 줄일 수 있는데 있다. 비상대응 모델내의 불확실한 변수에 대한 퍼지이론의 응용성을 개선하기 위해서는 전문가의 의견을 반영하여 변수들에 대한 적합한 멤버쉽 함수와 퍼지조건문을 확립할 필요가 있다.

• 지역사회간호학회지
• /
• 제14권4호
• /
• pp.639-645
• /
• 2003

This study was purposed to apply Aizen's Theory of Planned Behavior to workers using personal protective equipment. For this purpose, occupational health nurses conducted a survey of 173 male workers who were working at 6 different factories during the period from August to October 2003. The score of each variable related to the Theory of Planned Behavior was calculated: attitude (3.74); subjective norm(4.10); and perceived behavioral control (3.48). Four preceding factors were also assessed: behavioral belief(3.63); outcome evaluation(4.05); normative belief (4.20); and motivation to comply(4.03). Analysing the results, we found that two factors of the Theory of Planned Behavior are important in this case, which were subjective norm and perceived behavioral control that were found to be in a strong positive linkage with the use of personal protective equipment. Thus enhancing subjective norm and perceived behavioral control must be the most important goal of health education for workers who must use personal protective equipment. In addition, though behavioral intention, an intermediate factor of the Theory of Planned Behavior, was not measured in this study, subsequent studies are expected to include the factor in their models.

• 한국치위생학회지
• /
• 제14권5호
• /
• pp.673-680
• /
• 2014

Objectives : The purpose of this study is to investigate the awareness and performance towards the dental radiation protection behaviors in dental institutions in Busan and Gyeongnam. Methods : Two hundred and one dental medical institutions in Busan and Gyeongnam participated in the survey from March 10 to April 4, 2014. The data were analyzed using SPSS 19.0 for ${\chi}^2$ test, t-test, ANOVA, and multiple regression analysis. Results : There were significant differences in the awareness and performance towards the radiation protection behaviors according to age, monthly income, and type of hospital(p<0.05). Protective equipment influenced on the awareness and performance of dental staff and patients(p<0.001). The important variables on dental radiation protection included protection facility and education of protective equipment. It is found the variable to affect the performance of dental radiation protection was protection facility, wearing of protective device staff and patients, education on RSM. Conclusions : These results can provide the basic data for the effective dental radiation safety management and improvement for the dental institutions.

• Safety and Health at Work
• /
• 제14권1호
• /
• pp.107-117
• /
• 2023

Background: Thermophysiological comfort in a cold environment is mainly ensured by clothing. However, the thermal performance and protective abilities of textile fabrics may be sensitive to extreme environmental conditions. This article evaluated the thermal insulation properties of three technical textile assemblies and determined the influence of environmental parameters (temperature, humidity, and wind speed) on their insulation capacity. Methods: Thermal insulation capacity and air permeability of the assemblies were determined experimentally. A sweating-guarded hotplate apparatus, commonly called the "skin model," based on International Organization for Standardization (ISO) 11092 standard and simulating the heat transfer from the body surface to the environment through clothing material, was adopted for the thermal resistance measurements. Results: It was found that the assemblies lost about 85% of their thermal insulation with increasing wind speed from 0 to 16 km/h. Under certain conditions, values approaching 1 clo have been measured. On the other hand, the results showed that temperature variation in the range (-40℃, 30℃), as well as humidity ratio changes (5 g/kg, 20 g/kg), had a limited influence on the thermal insulation of the studied assemblies. Conclusion: The present study showed that the most important variable impacting the thermal performance and protective abilities of textile fabrics is the wind speed, a parameter not taken into account by ISO 11092.

• 한국사회복지학
• /
• 제66권2호
• /
• pp.179-202
• /
• 2014

본 연구는 결혼이주여성의 아동학대 발생위험에 영향을 미치는 요인으로 양육스트레스, 문화적응스트레스, 사회적지지의 구조적관계를 검증하는데 목적이 있다. 선행연구들을 바탕으로 가설모형을 설정한 후, 전국을 표본으로 결혼이주여성 195명에 대한 설문결과를 분석하였다. 분석결과 아동학대에 직접효과를 갖는 변수는 양육스트레스였고, 문화적응스트레스는 양육스트레스를 매개로 간접효과를 갖는 것으로 나타났다. 이와 함께 사회적지지는 아동학대에 영향을 미치는 양육스트레스에 대해 문화적응스트레스를 매개로 간접효과를 갖는 것으로 나타났다. 사회적지지는 아동학대에 직접적인 영향을 미치지 않았으나, 아동학대에 영향을 미치는 위험요인들을 상쇄시키는 보호요인으로 기능하였다. 이와 같은 연구결과에 근거하여 사회복지에 대한 실천적, 정책적 함의를 제안하였다.

• 대한간호학회지
• /
• 제39권5호
• /
• pp.651-661
• /
• 2009

Purpose: This study was done using meta-analysis to examine 58 studies from studies published in the past eight years (2000 to 2007) that included variables related to adolescents' suicidal ideation. Methods: The materials for this study were based on 32 variables which were selected from masters' thesis, doctoral dissertation and articles from Journals of the Korean Academy of Nursing. Results: The classification consisted of 5 variables groups and 32 variables. In terms of effect size on risk, variables which were significant included psychological variables (0.668), socio-cultural variables (0.511), family environmental variables (0.405), school environmental variables (0.221), and personal characteristics variables (0.147). In terms of effect size on protection, variables which were significant included personal characteristics variables (-1.107), psychological variables (-0.526), family environmental variables (-0.264), and school environmental variables (-0.155). In terms of effect size on risk variables, psychological variables (0.668) were highest. In terms of effect size on protective variables, the variable of personal characteristic (-1.107) was the highest. Conclusion: While the results indicate possible risk and protective variables for suicidal ideation, but prediction is still difficult. Further study to compare adolescents with similar variables but no suicidal ideation and those with suicidal ideation is necessary.

• 성인간호학회지
• /
• 제28권6호
• /
• pp.680-690
• /
• 2016

Purpose: This study was designed to identify knowledge, attitude, environment, and self-efficacy among perioperative nurses in terms of radiation protection and to describe those factors affecting radiation protection behaviors. Methods: The sample was comprised of 128 perioperative nurses who agreed to participate in this descriptive study. Data were collected from a self-administered questionnaire and were analyzed using the t-test, analysis of variance, Mann-whitney U test, Kruskal-Wallis test, Pearson's correlation, and multiple regression analyses. Results: Radiation protection behaviors were significantly different by participant's gender, length of career as a perioperative nurse, educational level and prior experience with radiation protection education. Radiation protection behaviors were significantly correlated with radiation protection environment and self-efficacy in terms of radiation protection behaviors. In the multiple linear regression models, radiation protection environment and self-efficacy on radiation protection behaviors were statistically significant predictors of radiation protection behaviors, which accounted for 50.3% of variance in dependent variable. Conclusion: This study concluded that radiation protective environment in operating room is important to promote radiation protective behaviors and radiation safety management program to enhance self-efficacy is highly recommended.

• Journal of international Conference on Electrical Machines and Systems
• /
• 제1권1호
• /
• pp.8-16
• /
• 2012

Fixed speed wind turbine generators system that uses induction generator as a wind generator has the stability problem similar to a synchronous generator. On the other hand, doubly fed induction generator (DFIG) has the flexibility to control its real and reactive powers independently while being operated in variable speed mode. This paper focuses on a scheme where IG is stabilized by using DFIG during grid fault. In that case, DFIG will be heavily stressed and a remedy should be found out to protect the frequency converter as well as to allow the independent control of real and reactive powers without loosing the synchronism. For that purpose, a crowbar protection switch or DC-link protecting device can be considered. This paper presents a comparative study between two protective schemes, a crowbar circuit connected across the rotor of the DFIG and a protective device connected in the DC-link circuit of the frequency converter. Simulation analysis by using PSCAD/EMTDC shows that both schemes could effectively protect the DFIG, but the latter scheme is superior to the former, because of less circuitry involved.

• 미생물학회지
• /
• 제32권2호
• /
• pp.139-146
• /
• 1994

Photobacterium leiognathi CuZuSOD(PSOD)의 부세포성 분포에 따른 방어효과가 paraquat, 열 쇼크, 과산화수소 그리고 $CuSO_4$의 처리시 각각 조사되었다. 서로 달리 periplasm내에 분포하는 PSOD와 세포질에 분포하는 PSOD 사이의 생리적 특성은 본 연구에서는 조건에 따란 차이를 보였다. Paraquat나 $H_2O_2$ 처리시에는 periplasm에 SOD를 발현하는 세포에서 세포질내에 SOD를 분포하는 경우보다 약간 방호효과가 나았으며 SOD 발현 정도는 이와 일관되게 아주 중요한 변화를 보였다. 그러나 열 쇼크와 $CuSO_4$의 처리시는 각각 이런 현상이 역으로 나타났다.