• 한국응급구조학회지
• /
• 제20권2호
• /
• pp.37-49
• /
• 2016

Purpose: This study investigated the current status of post-traumatic stress and related factors among safety managers in Korea National Parks. Methods: The study subjects were 109 safety managers working in Korea National Parks. General characteristics, job-related characteristics, experience of traumatic events and post-traumatic stress were collected by self-reported questionnaires through the mail. The associated factors with post-traumatic stress was analyzed by t-test, ANOVA and multiple linear regression. Results: Overall score of post-traumatic stress was $10.32{\pm}11.37$ and 12.8% was the high-risk group of post-traumatic stress disorder. In simple analysis, score of post-traumatic stress was associated with drinking frequency, disease history, duration of career, delay of rescue, provided the break, rest space and the number of experiences of traumatic events. Finally, the score of post-traumatic stress was significantly higher in subjects who experienced 3 (B=9.141, SE=3.538) or more than 4 (B=11.367, SE=3.063) traumatic events compared to subjects without experience of traumatic event. Conclusion: The score of post-traumatic stress was $10.32{\pm}11.37$ and 12.8% was the high-risk group among safety managers in Korea National Parks. Post-traumatic stress was associated with the experience of traumatic events. Management of safety managers after mobilization or experience of traumatic events will be helpful to decrease of post-traumatic stress.

• 대한간호학회지
• /
• 제9권1호
• /
• pp.23-29
• /
• 1979

This study on stress and coping method of psychiatric patients and non-psychiatric peoples was applied to people who was divided into two groups from Sep. 25 to Oct. 3, 1978, One is hospitalized patients in psychiatric wards of four hospitals in Seoul. The other is inhibitants in two Dongs of Seoul, This study purposed to the identification of the difference of stressful events’numbers, the severity of stress, and difference of coping methods between psychiatric patients and non-psychiatric peoples. Two instruments are used in this study. The first one to measure stress, is Holmes ＆ Rahe (1967)'s SRRQ (Social Readjustment Rating Questionnaire), which is amended, added or omitted through preliminary test, so that it consists of 48 items. The second one is for evaluating coping method on stress. It consists of 34 items amended through preliminary test after consideration of related literature review and survey on the basis of J.M.Bell (1977)'s“ 18-item-Questionnaire”. The materials were analyzed by S.P.S.S. Program. The results of analysis are as follows: 1. There was no significant difference in stressful event's numbers between psychiatric patients and non-psychiatric peoples (P > 0.5). 2. Psychiatric patients had higher severity of stress than non-psychiatric peoples (P < 0.5). 3. Psychiatric patients took more short-term coping methods than non-psychiatric peoples (p < 0.5).

• Korea-Australia Rheology Journal
• /
• 제21권4호
• /
• pp.269-280
• /
• 2009

The drop formation dynamics of a shear thinning, elastic, yield stress ($\tau_o$) fluid (Carbopol 980 (poly(acrylic acid)) dispersions) in silicone oil has been investigated in a flow-focusing microfluidic channel. The rheological character of each solution investigated varied from Netwonian-like through to highly non-Newtonian and was varied by changing the degree of neutralization along the poly (acrylic acid) backbone. We have observed that the drop size of these non-Newtonian fluids (regardless of the degree of neutralisation) showed bimodal behaviour. At first we observed increases in drop size with increasing viscosity ratio (viscosity ratio=viscosity of dispersed phase (DP)/viscosity of continuous phase (CP)) at low flowrates of the continuous phases, and thereafter, decreasing drop sizes as the flow rate of the CP increases past a critical value. Only at the onset of pinching and during the high extensional deformation during pinch-off of a drop are any differences in the non-Newtonian characteristics of these fluids, that is extents of shear thinning, elasticity and yield stress ($\tau_o$), apparent. Changes in these break-off dynamics resulted in the observed differences in the number and size distribution of secondary drops during pinch-off for both fluid classes, Newtonian-like and non-Newtonian fluids. In the case of the Newtonian-like drops, a secondary drop was generated by the onset of necking and breakup at both ends of the filament, akin to end-pinching behavior. This pinch-off behavior was observed to be unaffected by changes in viscosity ratio, over the range explored. Meanwhile, in the case of the non-Newtonian solutions, discrete differences in behaviour were observed, believed to be attributable to each of the non-Newtonian properties of shear thinning, elasticity and yield stress. The presence of a yield stress ($\tau_o$), when coupled with slow flow rates or low viscosities of the CP, reduced the drop size compared to the Newtonian-like Carbopol dispersions of much lower viscosity. The presence of shear thinning resulted in a rapid necking event post onset, a decrease in primary droplet size and, in some cases, an increase in the rate of drop production. The presence of elasticity during the extensional flow imposed by the necking event allowed for the extended maintenance of the filament, as observed previously for dilute solutions of linear polymers during drop break-up.

• 비파괴검사학회지
• /
• 제23권5호
• /
• pp.480-487
• /
• 2003

식물의 환경제어 향상을 위하여, 비파괴적인 방법을 사용하여 식물의 신호 특성이 연구되고 있다. 본 연구에서는 속씨식물과 겉씨식물에서 검출되는 음향방출 신호에 미치는 물 스트레스의 영향에 대하여 검토하였다. 낮 시간의 음향방출 신호는 밤 시간 보다 훨씬 많았으며, 낮 시간의 신호는 식물의 물 스트레스에 의해서 발생한 것으로 판단된다. 속씨식물과 겉씨식물은 음향 신호의 강한 주파수 대역이 다르게 나타났으며, 실외에서 검출한 식물의 음향 신호 주파수는 동일한 식물을 사용하여 실내에서 검출한 신호의 주파수 범위와 일치하였다.

• 대한기계학회논문집A
• /
• 제26권1호
• /
• pp.39-47
• /
• 2002

Performed here is an assessment study for deterministic fracture mechanics analysis of a pressurized thermal shock(PTS). The PTS event means an event or transient in pressurized water reactors(PWRs) causing severe overcooling(thermal shock) concurrent with or followed by significant pressure in the reactor vessel. The problems consisting of two transients and 10 cracks are solved and maximum stress intensity factors and maximum allowable nil-ductility reference temperatures are calculated. Their results are compared each other to address the general characteristics between transients, crack types and analysis methods. The effects of elastic-plastic material behavior and clad coating on the inner surface are explored.

• International Journal of Computer Science & Network Security
• /
• 제21권7호
• /
• pp.173-181
• /
• 2021

The Ministry of Education in Saudi Arabia encourages Saudi students to continue their education at Saudi universities or abroad. Currently, an estimated 1,282,140 Saudi students are studying at Saudi universities. The extent of the research so far has not focused on Saudi student experiences, but it has shown that even a single negative event can dramatically reduce the chances of a student completing a degree. Thus, more research is necessary to identify and describe the context and obstacles (environmental and psychological) that Saudi students face. The evaluation was multifaceted to capture not only performance outcomes, but also other factors that have been suggested by research as influential to students' ability, such as the environmental, cultural, and psychological risks for graduation that Saudi students self-report. A single group pretest (survey) design was used in this study. Findings suggest depression stress and college stress predict stress levels, while subjective happiness predicts levels of scientific participations of the sample. Moreover, depression stress shows more consistency with hours spent on the internet for study purposes. These results should be considered in study support programs both institutionally and geopolitically by universities and governments.

• 보건행정학회지
• /
• 제12권1호
• /
• pp.102-124
• /
• 2002

To find out more efficient ways of implementing health promotion programs and to determine the factors affecting the results of various interventions, we reviewed 73 articles un the effectiveness of health promotion programs. These include the papers on the smoking, alcohol, drug abuse, nutrition(obesity) and stress management etc. Specific interventions evaluated in this review are education based on the lecture or video shows, health-related event activities, modifications of policy or the environment, health risk appraisal etc. By using KIHASA Line of Korea Institute of Health and Social Affairs, National Congress Library Database MEDLINE, we identified 201 articles published from 1980 to Jun. 1979 and finally selected 73 papers which contain the implementation process, and result of each program. The factors used in the analysis of the programs are (1) characteristics of participants (2) interventions evaluated (3) research design (4) length of programs and evacuation point (7) outcome indices (6) effect of program evaluated by each author. The study results did not prove positive effect of education based on lectures or video shows etc. Rather, it was suggested that lecture-based education has negative effect on the result. Event activity such as contest or health festivals has positive effect, and policy change or environmental change is closely related to the event activity. Also, the result shows that the overall effect of programs fur the students is less than that of the programs for the others. The programs conducted over, 1-year are mere likely to have positive outcomes than shorter ones. And, the outcomes of the programs with controlled research design such as experimental or quasi-experimental study tend to be evaluated inferiorly to those with non-experimental design.

• 한국산학기술학회논문지
• /
• 제16권1호
• /
• pp.116-128
• /
• 2015

본 연구의 목적은 외상성 사건 경험이 외상 후 스트레스 장애에 미치는 영향에 있어서 스트레스 대처양식의 매개효과를 알아보고자 하는데 있다. 연구목적을 달성하기 위해 제주지역 경찰관서 4개소에서 경찰관을 대상으로 총 297명의 사례를 분석하였다. 연구가설을 검증하기 위하여 Baron & kenny의 회귀분석 4단계를 거쳐 매개 효과를 검증하였고, Sobel Test를 실시하여 매개효과에 대한 유의도를 검증하였다. 외상성 사건 경험 이후 외상 후 스트레스 장애 증상의 발현 사이의 경로를 확인함으로써 적절한 외상 후 스트레스 장애에 대한 개입 프로그램을 설정하는데 도움을 주고, 궁극적으로 제주지역 경찰관들이 외상 후 스트레스에서 벗어나 긍정적이고 역동적인 근무 환경을 조성하는데 도움을 줄 것이다.

• 한국콘텐츠학회논문지
• /
• 제22권2호
• /
• pp.803-812
• /
• 2022

본 연구의 목적은 무아관이 중년기 성인이 겪는 생활사건 스트레스의 부정적인 영향을 감소시키는지 검증하는 것이다. 40대와 50대 성인남녀 207명을 대상으로 온라인 설문조사를 실시하였으며, 위계적 회귀분석 및 단순 기울기 분석을 실시하였다. 그 결과, 무아관은 생활사건 스트레스가 지각된 스트레스 및 주관적 안녕감에 미치는 부정적인 효과를 조절하는 것으로 밝혀졌다. 구체적으로 무아관은 생활사건 스트레스가 지각된 스트레스에 미치는 정적인 효과를 감소시키고, 주관적 안녕감에 미치는 부적인 효과를 감소시켰다. 본 연구의 결과는 동양적·불교적 자기관인 무아관이 중년기의 성인이 겪는 생활사건 스트레스에 대한 완충효과를 갖는다는 것을 의미한다. 본 연구는 상담 및 임상 장면에서 무아관을 중년기 성인의 스트레스에 대처하기 위한 중요한 요소로 고려해야 한다는 것을 시사한다. 그리고 본 연구는 불교적 개념인 무아에 관한 후속 실증연구를 촉진시킬 것으로 예상된다. 마지막으로 한계점 및 후속연구를 제언하였다.

• 한국의료질향상학회지
• /
• 제27권1호
• /
• pp.10-19
• /
• 2021

Purpose: This study was designed to investigate that the prevalence of Post-traumatic stress disorder (PTSD) and occupational environmental factors that contribute to the developing of PTSD in workers who worked in emergency room in Korea. Methods: This study is a multicenter cross-sectional study that was conducted in three emergency rooms. Data was collected by self-response method through questionnaire. The Impact Event Scale-Revised was used to screen the high-risk group of PTSD. Univariate and multivariate regression analysis was used to identify the factors associated with the developing of high-risk group of PTSD. Results: Total 211 subjects responded to the questionnaire. Of these, 170 subjects experienced psychological trauma event (PTE) in the working environment. And 60 subjects classified as high risk group of PTSD, so a prevalence of high risk group for PTSD was 28.4%. Factors related to the high risk group of PTSD were the frequency of psychological trauma events experienced over the past 1 year and the high score of QIDS-SR16. Conclusion: The prevalence of high risk group for PTSD among emergency room workers in Korea is very high. This may adversely affect the safety of patients, so early screening and intervention are necessary.