• 한국치위생학회지
• /
• 제14권5호
• /
• pp.659-665
• /
• 2014

Objectives : This study aimed to determine the effects of stress coping type on self-esteem and satisfaction with life in dental hygiene students. In particular, an attempt is made to determine the effects of sub-factors of stress coping type on self-esteem and satisfaction with life, get a better understanding of self-esteem and satisfaction with life for dental hygiene students, and provide basic data in developing a program that can identify, prevent, and control the problems with stress for dental hygiene students. Methods : This is descriptive correlation research to determine the relations between self-esteem and stress coping type in dental hygiene students. 212 dental hygiene students at colleges in Ulsan Metropolitan City were asked to complete a self-administered questionnaire from June 10 to 20, 2013; then, 209 copies were used in analysis, with the exception of 3 copies which were excluded from recording. Results : Self-esteem and satisfaction with life were positively affected by active stress coping but were negatively affected by passive stress coping. As for such sub-factors of stress coping type as problem-focused coping, pursuit of social support, emotional relief coping, and hopeful thinking, the sub-factors of active coping type also positively affected self-esteem and satisfaction with life. Self-esteem interacted with the sub-factors of stress coping type and satisfaction with life. Conclusions : Since stress coping type was found to be a factor affecting self-esteem and satisfaction with life for students, the results of this study are expected to be used as basic data in developing a program that can help them cope actively with stress.

• Journal of Microbiology and Biotechnology
• /
• 제17권4호
• /
• pp.586-593
• /
• 2007

Seed coating by a phenazine-producing bacterium, Pseudomonas chlororaphis O6, induced dose-dependent inhibition of germination in wheat and barley seeds, but did not inhibit germination of rice or cucumber seeds. In wheat seedlings grown from inoculated seeds, phenazine production levels near the seed were higher than in the roots. Deletion of the gacS gene reduced transcription from the genes required for phenazine synthesis, the regulatory phzI gene and the biosynthetic phzA gene. The inhibition of seed germination and the induction of systemic disease resistance against a bacterial soft-rot pathogen, Erwinia carotovora subsp. carotovora, were impaired in the gacS and phzA mutants of P chlororaphis O6. Culture filtrates of the gacS and phzA mutants of P. chlororaphis O6 did not inhibit seed germination of wheat, whereas that of the wild-type was inhibitory. Our results showed that the production of phenazines by P. chlororaphis O6 was correlated with reduced germination of barley and wheat seeds, and the level of systemic resistance in tobacco against E. carotovora.

• International Journal of Automotive Technology
• /
• 제7권3호
• /
• pp.353-360
• /
• 2006

The nominal structural stress calculation method proposed by Radaj has included some problems as follows: (a) How the value of the diameter D is decided in the method; (b) It is not possible to estimate nominal structural stress of the spot welded joints with the balanced sheet in-plane load that no general loads are obtained by FE shell analysis. In this paper, the new method for calculating nominal structural stress was proposed to solve above-mentioned problems. The proposed method calculates the nominal structural stress through the circular plate theory in theory of elasticity. This theoretical analysis uses not only general loads but also nodal displacements around spot welding provided by FE shell analysis as boundary condition. Fatigue test data of various spot-welded joints could be arranged in a narrow bandwidth on S-N chart using the nominal structural stresses calculated by proposed method. The fatigue life prediction method using the proposed method for calculating nominal structural stress is useful for the prior evaluation technique that can predict the fatigue life of spot welding by CAE.

• 한국엔터테인먼트산업학회논문지
• /
• 제14권3호
• /
• pp.353-361
• /
• 2020

본 연구는 보건계열 작업치료학과에 재학 중인 대학생의 생활스트레스와 스트레스 대처와의 상관관계를 파악하여 학생들의 심리적 안정 및 스트레스 대처에 대한 다양한 방법과 방향을 제시하고자 실시하였다. 2019년 6월 1일부터 7월 30일까지 전라도 소재의 5개 대학교 작업치료학과에 재학 중인 학생 369명을 대상으로 실시하였으며, 대상자가 직접 설문지에 대답하게 하였다. 연구 결과 생활스트레스는 일반적 특성인 성별, 학년, 가족관계, 경제수준에서 차이를 보였으며, 스트레스 대처는 성별에서만 차이가 나타났다. 생활스트레스와 스트레스 대처는 유의한 상관관계를 보였고, 스트레스 대처의 하위영역인 정서 완화적 대처, 소망적사고 등의 소극적 대처와 유의한 상관관계를 보였다. 생활스트레스의 하위영역 또한 스트레스 대처의 하위 영역과 유의미한 상관관계가 나타났다. 결론적으로 성공적인 대학생활, 더 나아가 사회생활에 잘 적응하기 위해서는 대학생활 동안의 생활스트레스를 감소시킬 수 있는 스트레스 대처 프로그램을 끊임없이 개발하고 적용 효과에 대한 후속 연구가 여러 방면으로 이루어져야 할 것으로 생각된다.

• 여성건강간호학회지
• /
• 제17권2호
• /
• pp.99-108
• /
• 2011

Purpose: The purpose of this study was to compare the levels of stress, social support, and marital satisfaction between married immigrant women living in urban areas and women living in rural areas to identify ways to improve their mental health. Methods: Two hundred married immigrant women were recruited from multicultural familysupport centers located in Daejeon City and Chungcheong Province. From July, 2009 to January, 2010, data were collected using self- administered questionnaire. Study instruments were scales for acculturative stress, housewives life stress, support from spouse, and marital satisfaction. Results: Urban married immigrant women had lower levels of acculturative stress and higher levels of support from spouse and more positive marital satisfaction compared to rural women. Both groups reported similar levels of stress in life as a housewife. Factors influencing marital satisfaction in both group were lower levels of acculturative and housewives life stress, higher levels of support from spouse, and living with parents-in-law. Conclusion: Rural married immigrant women may have more problems in adjusting to Korean culture and marriage compared to urban women. Therefore, to improve the physical and psychological wellbeing and marital adjustment of married immigrant women, development of nursing strategies according to area of residence is needed.

• 정신신체의학
• /
• 제7권2호
• /
• pp.226-232
• /
• 1999

연구목적 : 본 연구에서는 사회적, 심리적 관점에서 아토피 피부염에서 보이는 스트레스의 양을 측정 하고 스트레스에 대한 대처 방식의 특정을 알아보고자 하였다. 방법 : 1997년 9월부터 1998년 5월까지 중앙대학교 의과대학 부속병원 피부과에 내원한 20세 이상의 아토피 피부염 환자를 분석 대상으로 생활사건 척도(Scale of Life Event)와 다차원적척도(Multimensional Coping Scale)를 이용하여 스트레스 정도와 대처방식의 차이를 알아보고자 하였다. 결과 : 생활 사건에 대한 스트레스의 양은 아토피 피부염 환자군이 $386.52{\pm}257.93$이었고, 대조군은 $255.98{\pm}161.93$으로 통계적으로 유의한 차이를 보였고 대처 방식에 있어서는 아토피 피부염 환자군에서 적극적 망각 척도, 정서적 진정 척도, 긍정적 비교 척도에서 각각 $7.30{\pm}3.56$(t=2.55. df=53, p=0.013), $8.0{\pm}2.05$(t=2.42. df=58, p=0.019), $6.00{\pm}4.97$(t=2.48, df=58, p=0.16)으로 대조군에 비해 통계적으로 유의하게 높았다. 결론 : 스트레스는 아토피 피부염의 발생 및 악화에 영향을 미칠 것으로 추정되며, 적극적 망각과 같은 정서중심적, 비효과적 대처방식을 문제 중심적 대처로 변환시키고 자신보다 못한 상태에 있는 타인을 비교함 자신의 상태를 유지하려하는 인지적 측면과 스트레스 상황에서 발생한 정서적 혼란을 가라앉히려는 정서적 측면에 대해 지지적 치료가 이루어지면 아토피 피부염을 비롯한 정신 신체 질환의 치료에 도움이 될 것으로 생각된다.

• Computers and Concrete
• /
• 제29권1호
• /
• pp.47-57
• /
• 2022

The increase in waste tires has brought serious environmental problems. Using waste tires rubber particles as aggregate in concrete can reduce pollution and decrease the usage of natural aggregate. The paper describes an investigation on flexural bearing capacity of self-compacting concrete (SCC) pavement slabs containing crumb rubber. Cyclic loading tests with different stress ratios and loading frequencies are carried out on SCC pavement slabs containing crumb rubber. Based on Paris Law and test data, the fatigue life of SCC pavement slab containing crumb rubber is discussed, and a revised mathematical model is established to predict the fatigue life of SCC pavement slab containing crumb rubber. The model applies to different stress ratios and loading frequencies. The fatigue life of SCC pavement slab containing crumb rubber is affected by the stress ratio and loading frequency. The fatigue life increases with the increase of stress ratio and loading frequency. Real-time acoustic emission (AE) signals in the SCC pavement slab containing crumb rubber under cyclic loading are measured, and the characteristics of crack propagation in the SCC pavement slab containing crumb rubber under different stress ratios and loading frequencies are compared. The AE signals provide abundant information of fracture process zone and crack propagation. The variation of AE ringing count, energy and b-value show that the fracture process of SCC pavement slab containing crumb rubber is divided into three stages.

• Journal of Ginseng Research
• /
• 제41권4호
• /
• pp.578-588
• /
• 2017

Background: Elevated testicular temperature disrupts spermatogenesis and causes infertility. In the present study, the protective effect of enzymatically biotransformed Panax ginseng Meyer by pectinase (GINST) against chronic intermittent heat stress-induced testicular damage in rats was investigated. Methods: Male Sprague-Dawley rats (4 wk old, 60-70 g) were divided into four groups: normal control (NC), heat-stress control (HC), heat-stress plus GINST-100 mg/kg (HG100), and heat-stress plus GINST-200 mg/kg (HG200) treatment groups. Each dose of GINST (100 mg/kg and 200 mg/kg) was mixed separately with a regular pellet diet and was administered orally for 24 wk. For inducing heat stress, rats in the NC group were maintained at $25^{\circ}C$, whereas rats in the HC, HG100, and HG200 groups were exposed to $32{\pm}1^{\circ}C$ for 2 h daily for 6 mo. At week 25, the testes and serum from each animal were analyzed for various parameters. Results: Significant (p < 0.01) changes in the sperm kinematic values and blood chemistry panels were observed in the HC group. Furthermore, spermatogenesis-related molecules, sex hormone receptors, and selected antioxidant enzyme expression levels were also altered in the HC group compared to those in the NC group. GINST (HS100 and HS200) administration significantly (p < 0.05) restored these changes when compared with the HC group. For most of the parameters tested, the HG200 group exhibited potent effects compared with those exhibited by the HG100 group. Conclusion: GINST may be categorized as an important medicinal herb and a potential therapeutic for the treatment of male subfertility or infertility caused by hyperthermia.

• International Journal of Advanced Culture Technology
• /
• 제12권2호
• /
• pp.427-437
• /
• 2024

The purpose of this study is to determine the impact of Chinese international students' academic resilience on acculturation stress and college life adjustment. In order to achieve this research objective, the research subjects were Chinese students participating in sports in Korea. The sampling method was convenience sampling, and a total of 300 people, 150 men and 150 women, were selected as research subjects through sharing the questionnaire link online and email. The research tool used in this study was a questionnaire. Based on the questionnaire that had secured reliability and validity in previous research, it was modified and supplemented to suit this study. The statistical analysis used for data analysis was frequency analysis, exploratory factor analysis, reliability analysis, and multiple regression analysis using SPSS Windows 22.0 Version. The conclusions obtained in this study through data analysis according to these methods and procedures are as follows. First, the academic elasticity of Chinese students participating in sports has partially influenced by cultural adaptation stress. Second, the academic elasticity of Chinese students participating in sports has partially influenced by university life. Third, the acculturation stress of Chinese students participating in sports was found to partially affect their adaptation to university life.

• Journal of the Korean Wood Science and Technology
• /
• 제31권6호
• /
• pp.45-54
• /
• 2003

The density and strength of wood is affected by degradations and defects, such as voids and knots. Old wooden structures such as traditional cultural properties have been deteriorated by these types of defects. They were evaluated by a visual observation that is difficult to evaluate the inner deterioration in structures. In this study, three nondestructive testing techniques were investigated to detect the wooden structural members. Ultrasonic stress wave tests, drilling resistance tests and visual inspections were used to examine the structural wood members. Patterns of Resistograph using by drilling resistance tests could indicate the features of internal wood such as voids, knots, decay, fungi, and so on. The technique just like as ultrasonic stress wave tests, however, difficult to detect exactly area where small amounts of internal deterioration in logs are. In spite of results of ultrasonic stress wave test, the internal deterioration of wooden structural members could be evaluated by the relationship between ultrasonic stress wave tests and drilling resistance tests.