• 대한예방한의학회지
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• 제23권3호
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• pp.71-82
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• 2019

Objectives : To determine the relationship between Type A Behavior Pattern and lifestyle and psychological characteristics of Korean medical students. Methods : The Type A Behavior Pattern in 73 Korean medical students was measured. Questionnaires were conducted on lifestyle and mental characteristics. Results : In the PSQI, ISI, S-Scale, BEPSI-K, PWI-SF, CES-D, BDI, STAI-X-1, STAI-X-2, K-RTA, PWI-SF and PSS surveys, The score of Type A Behavior Pattern was significantly higher than that of Type B Behavior Pattern. Otherwise, in SES, WHOQOL-BREF(Physical, Psychological) and SWLS surveys, The score of Type A Behavior Pattern was significantly lower than that of Type B Behavior Pattern. Conclusions : Lifestyle and psychological characteristics of Korean medical students are correlated with Type A Behavior Pattern. Therefore, Type A Behavior Pattern could be used an indicator reflecting various properties of Korean medical students.

• 한국직업건강간호학회지
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• 제17권2호
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• pp.180-190
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• 2008

Purpose: The present study was intended to assess stress, depression and fatigue of nurses working for university hospitals and to reveal its association with the type A behavior pattern. Method: The self-administered questionnaires were given to 810 nurses employed in 4 participating hospitals located in Daejeon City. The questionnaire items included sociodemographic, job-related, and the type A behavior patterns as independent variables and the PWI, SDS and MFS as dependent variables. Result: The proportion of the type A behavior pattern was 24.3% of subjects, in the degree of stress, high risk stress group was 87.0%, in the degree of depression, normal group was 60.9%, in the degree of fatigue, high risk fatigue group was 48.6%. The degree of stress, depression, and fatigue were significantly higher in the type A behavior pattern group then the type B behavior pattern group. The type A behavior pattern was significant positive correlation with stress, depression, and fatigue. The degree of stress(OR=1.2, 95%CI=1.167-1.262), depression(OR=1.1, 95%CI=1.11-1.17) and fatigue (OR=1.1, 95%CI=1.04-1.06) were significantly higher for the type A then the type B behavior pattern group. Conclusion: The degree of stress, depression, and fatigue were significantly higher in the type A then the type B behavior pattern group.

• 한국산학기술학회논문지
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• 제13권6호
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• pp.2589-2599
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• 2012

일부 종합병원에 근무하는 간호사들의 A형 행동유형과 피로자각증상과의 관련성을 검토하고자 일부 종합병원에서 근무하는 간호사 306명을 대상으로 2011년 5월 1일부터 6월 30일까지의 기간 동안에 구조화된 무기명 자기기입식 설문지(self-administered questionnaire)를 이용한 설문조사를 하였다. 연구결과, 조사대상자의 A형 행동유형의 분포는 A형 행동유형군이 50.7%, B형 행동유형군이 49.3%이었으며, 피로자각증상의 분포는 정상군이 76.8%, 고위험피로군이 23.2%이었다. A형 행동유형에 따른 피로자각증상의 분포를 보면, 피로자각증상이 정상인군은 B형 행동유형군이 높은 반면, 고위험피로군은 A형 행동유형군이 유의하게 높았으며, A형 행동유형은 피로자각증상과 유의한 양의 상관관계를 보였다. 또한 B형 행동유형군보다 A형 행동유형군에서 고위험피로군에 속할 위험비가 유의하게 상승하였다. 위와 같은 결과를 볼 때 A형 행동유형군은 B형 행동유형군보다 피로자각증상이 유의하게 높은 것을 알 수 있었다. 향후 다양한 연구대상에 대한 A형 행동유형과 피로자각증상과의 관련성에 대한 지속적인 연구가 필요할 것으로 생각된다.

• 국제물리치료학회지
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• 제8권2호
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• pp.1135-1141
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• 2017

Stress and fatigue are general physical aspects of our daily lives. It has been shown that physical therapists have different levels of job stress and fatigue according to the type A/B behavior patterns. This study collected data from 212 physical therapists between October 28 and November 23, 2016 using an anonymous, self-administered questionnaire. The study results showed the proportion of physical therapists with the Type A behavior patterns(TABP) was 18% greater than that of physical therapists with the Type B behavior patterns(TBBP). In this study, physical therapists with TABP were compared with physical therapists with TBBP. The results indicated that physical therapists with TABP were more inclined to experience higher levels of overall job stress and fatigue from the following stress factors: physical environment, job requirement, and job autonomy. Therefore, the stronger the tendency toward TABP, the stronger the feeling of job stress and fatigue from physical environment, job requirement, and job autonomy. Those with a tendency toward TBBP showed positive correlations between job requirement and the total job stress score; thus, the stronger the tendency toward TBBP, the stronger the feeling of overall job stress and fatigue from job requirement. This study suggests that it is necessary to manage the job stress and fatigue of physical therapists with both TABP and TBBP and to manage the job stress and fatigue of physical therapists with the type A behavioral pattern.

• 치위생과학회지
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• 제2권2호
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• pp.75-83
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• 2002

By extracting the variables related to the work stress generated from dental hygiene, identifying their relationships, this study aims to contribute to academic progress on work stress. The test results of this study are as follows for each hypothesis: 1. Among the work stress sensing factors, role ambiguity showed correlation to the active coping strategy and the passive coping strategy, whereas it did not have any correlation to the evasive reation. However, the physical resource environmental factor showed correlation to the active coping strategy, whereas it did not have any correlation to the other reation. 2. The passive coping strategy, among the work stress coping strategies, influences the role ambiguity, B type, work ambiguity, physical resource environmental factor by about 18.7%. 3. The active coping strategy, among the work stress coping strategies, influences the social support, role ambiguity, work place of health center factor by about 18.9%. 4. The evasive reaction, among the work stress coping strategies, was influenced by only the 36 years old over factor by approximately 4.2%. 5. It was found in all work stress sensing factors that the group with lower social support had a more degree of experiencing stress than the group with higher social support. In case of the behavior pattern, the type A experienced more stress than the type B only in role ambiguity. 6. It was found that the group with the higher social support tended to choose more active coping strategy than the lower social support. In case of behavior pattern, the type B coped more actively than type A in the passive coping strategy.

• Food Science and Biotechnology
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• 제16권2호
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• pp.183-186
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• 2007

The type of mixed gel network of $\kappa$-carrageenan/agar was determined by applying rheological principles. Apparent Young's modulus of the mixed gels was mathematically analyzed with (a) simply adding the moduli of two component gels, (b) phase-separated type's upper and lower bound models, (c) interpenetrating type's logarithmic model. The experimental data fitted the estimates from the operation (a). Whereas, as for the models (b), the experimental values in the agar-rich region fitted the estimates of the upper bound model, but in the $\kappa$-carrageenan-rich region slightly deviated from those of the lower bound model. It reflected an evidence of a phase-separated type, although it was not typical, that there must be data good-fit in the agar-rich and $\kappa$-carrageenan-rich regions with the upper and lower bound models, respectively. Experimental values disagreed with estimates of the model (c). Gel time was analyzed to evince the phase-separated type. As agar concentrations increased at a fixed amount of $\kappa$-carrageenan, gel time gradually decreased and then sharply increased and decreased again. The pattern of such change in gel time also represented a typical behavior of phase-separated type's mixed gels.

• 한국환경과학회지
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• 제30권1호
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• pp.1-10
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• 2021

The purpose of this study is to verify the physiological and psychological benefits of indoor garden to humans and to analyze the comparison according to Type A behavior pattern. The subjects included 18 male university students. Heart rate variation was used as a parameter of physiological assessment, and Semantic Differential (SD), Profile of Mood States-Brief (POMS), and State-Trait Anxiety Inventory (STAI) were used as tools for psychological evaluation. The participants were subjected to a psychological evaluation when they were present in a garden. As a result, the parasympathetic nervous activity was increased in the indoor garden. In the analysis of psychological evaluation, indoor garden improved the positive mood states and decreased negative feelings with significant changes only in Type A group. This study supported that indoor garden can have physiological and psychological relaxing effects, which could be more significant in Type A group than Type B.

• Elastomers and Composites
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• 제49권1호
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• pp.73-81
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• 2014

칼날형 마모 마찰 시험기를 이용하여 NR배합고무의 마모 거동을 조사하였다. 온도, 하중, 그리고 회전속도를 변화시켜 마모속도에 미치는 영향과 열화된 배합고무의 마모 현상에 대해 평가하였다. 시편의 회전속도와 수직 하중이 증가할수록 마모속도가 증가하였다. 실험온도가 증가할수록 마찰계수가 감소하였고, 마모속도도 감소하였다. 마찰에너지와 마모속도 사이에 Power-Law 관계를 나타냈으며 마모속도는 열화에 의해 급격히 증가하였다. 시편의 마모패턴은 마모조건에 의해 영향을 받았으며 특히 수직 하중을 변화시켰을 때 마모융기(ridge)간격에 큰 변화를 보였다. 배합고무의 마모속도를 결정하는데 간헐적 마모손실 무게측정 대신 칼날형 마모시험기를 이용한 연속적인 마모이동거리측정으로 대체할 수 있음을 확인하였다.

• Elastomers and Composites
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• 제56권3호
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• pp.172-178
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• 2021

The wear behavior of styrene-butadiene rubber (SBR) and butadiene rubber (BR) was investigated using a blade-type abrader with a steel blade (SB), Ti-coated tungsten carbide blade (TiB), or zirconia blade (ZB). The wear rate of SBR against SB and TiB decreased with increasing number of revolutions because of the blunting of the blades during wear. However, the wear rate of SBR against ZB remained nearly constant with little blade blunting. Generally, the wear rate of BR was largely unaffected by the blade material used for abrasion. The wear rate and frictional coefficient of SBR were found to be higher than those of BR at similar levels of frictional energy input. A power-law relationship was found between the wear rate and frictional energy input during abrasion. A well-known Schallamach pattern was observed for SBR, while a much finer pattern was observed for BR. The blade material affects the wear rate of the rubbers because the macromolecular free radicals and blade tend to undergo mechano-chemical reactions. The inorganic ZB was found to be the most inert for such a mechanism.

• 대한토목학회논문집
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• 제29권3B호
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• pp.281-287
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• 2009

본 연구에서는 우리나라 인천 남구 시화호 연안의 퇴적토를 가토제(containment dyke)내에 펌핑 매립한 인천 LNG 인수기지 조성부지 내의 준설지반과 인근 시화호 조성공사 지역의 해성퇴적토에 대해 토질시험을 실시하여 토질정수를 산정하고, 돌핀 기초말뚝의 배열 조건을 달리하여 태풍 내습 시 돌핀에 작용하는 최대 파고에 의한 돌핀 기초말뚝의 변위, 전단력과 모멘트에 대한 거동 특성을 해석하였다. 수치해석 결과, 최대 심해설계파와 만내발생파의 파력에 의한 돌핀구조물의 거동은 일반적으로 준설토와 퇴적토의 지반반력계수 보다는 말뚝 직경의 크기에 더 큰 영향을 받는 것으로 나타나고 있다. 또한 돌핀구조물 기초말뚝을 직항으로 모델링한 경우와 경사말뚝을 조항으로 모델링한 경우, 조항이 직항보다 돌핀에 작용하는 외력에 대해 수십 배 이상의 저항효과가 있는 것으로 나타나고 있다.