• Transactions of the Korean Society of Machine Tool Engineers
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• v.16 no.6
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• pp.94-102
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• 2007

Applications of bonded dissimilar materials such as large scale integration (LSI) packages, ceramics/metal and resin/metal bonded joints, are very increasing in various industry fields. It is very important to analyze the thermal stress and stress singularity at interface edge in LSI. In order to investigate stress singularities on the bonded interface edges and delamination of die pad and resin in the IC package. In this paper, stress singularity factors(${\Gamma}_i$) and stress intensity factors($K_i$) considering thermal stress in the IC package were analyzed by using the 2-dimensional elastic boundary element method(BEM).

• Women's Health Nursing
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• v.6 no.4
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• pp.493-505
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• 2000

The purpose of this study was to contribute to maternal nursing in the early postpartum stage and neonate nursing. Data were collected through self-report questionaires which were constructed to include perception of the newborn scale, parental role stress scale and anxiety scale. The subjects consisted of 81 mothers of preterm babies at seven hospitals in Seoul and Kyoungki-Do, from July 15 to September 30, 2000. Data were analysed by SPSS/PC using frequency, percentage, mean, standard deviation, ANOVA, t-test and Pearson correlation coefficient. The results were summarized as follows ; 1. The mean of perception of the newborn in the early postpartum stage was 1.35. The mean of parental role stress was 10.78. The mean of anxiety of mother was 39.74. 2. There were significant positive correlation between parental role stress and anxiety of mothers. 3. There were not significant influencing general characteristics to perception of the newborn and parental role stress. General characteristics related to the level of anxiety were economic status, expectation of pregnancy, birthing order, newborn weight. The above findings indicated that the level of parental role stress and anxiety of preterm birth mothers were correlated. Therefore nursing intervention for reducing parental role stress and anxiety should be provided for preterm birth mothers.

• Journal of Korean Academy of Nursing
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• v.28 no.3
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• pp.583-590
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• 1998

This study was undertaken in order to examine the effect of hardiness on stress-causing factors, defined in this study as burnout in nursing. The subjects were 248 nurses working in three general hospitals in Taejon. The instruments used for this study were a survey of general characteristics, modified Health-Related Hardiness Scale(HRHS) (25 items), job stress scale (63 items), and burnout scale (20 items). Analysis of data was done through the mean, percentage, Pearson correlation coefficient, and stepwise multiple regression done with a SAS program. The results of this study are as follows. 1) The average item score for the job stress was high at 4.44. In the subcategories, the highest degree of stress was night duty(5.11), and work overload(4.70), responsibility for extra affairs(4.70), conflict in nurse-doctor relationships(4.69), and low reward(4.63) in that order. 2) In the stepwise multiple regression analysis, hardiness(11.55%) was a significant determinant of burnout along with job stress(17.24%) and job duration(12.94%). The results of this study show that hardiness has an effect on psychological distress caused by stress.

• Journal of Korean Academy of Nursing Administration
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• v.14 no.3
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• pp.321-331
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• 2008

Purpose: This study examined the association of job satisfaction and job stress with the self regulation of nurses. Method: This research was descriptive in its design and used a self-administered questionnaire. The study subjects were 173 nurses who worked in the three university teaching hospitals. The instruments used in the study were self-regulation scale, job satisfaction scale and job stress scale. The data were analyzed by ANOVA, t-test, Pearson Correlation Coefficient, and multiple regression. Results: The mean score of self regulation, job satisfaction and job stress were 4.58, 1.90 and 3.31, respectively. The degree of error and confidence in decision making of the study subjects was associated with the extent of job satisfaction and job stress. Conclusion: Self regulation made an influence in a statistically significant way on nurses' job satisfaction and job stress. Therefore, we need to develop strategies to enhance the self regulation of nurses to improve their job satisfaction and job stress in a positive way.

• Journal of Oriental Neuropsychiatry
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• v.6 no.1
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• pp.71-84
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• 1995

This paper is for studying interrelation between Stress perception, Todai Index(THI) test and coffee. this study was done on 163 college women whose ages were 18 to 33 and who were in University in Wonju. The Stress perception test and THI test shows the following results. 1. The Stress test on the group that drunk coffee and beverage shows high degree of oppression sense about school and daily life. 2.The total THI test on the group that drunk coffee shows high degree of complaint on mouth, evacuation and lie scale, but shows the lowest piont on nervousrness. 3. The D-group womrn who drink a cup of coffee, two or three show the highest complaint on mouth and evacuation. E-group shows the lowest lie scale. 4 The Stress test and health examination on the group that drunk coffee show high degee of stress. And it also shows stimulative relation between the condition of body health and drinking coffee. The above shows that coffee and some beverage can affect on mental and physical health. Especially they are considered as a factor of stimulus on stress response. Through the THI test, the effect on mouth and evacuation, lie scale and nervousness could be obseved. So the drinking coffee and beverage requires circumspection.

• Journal of Korean Critical Care Nursing
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• v.15 no.2
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• pp.27-38
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• 2022

Purpose : The purpose of this study was to identify the mediating effect of role clarity in the relationship between clinical decision-making abilities and job stress among advanced practice nurses at tertiary hospitals. Methods : The participants were 137 advanced practice nurses. The assessment tools were clinical decision-making in nursing scale, role ambiguity scale, and Korean occupational stress scale (KOSS-26). Data were analyzed with the SPSS/24.0 program and mediation analysis was performed according to the Baron and Kenny methods. Results : There were significant relationships between clinical decision-making abilities and job stress (r=-.33, p<.001), and role clarity and job stress (r=-.29, p=.001). Role clarity showed partial mediating effects in the relationship between clinical decision-making abilities and job stress (Z=2.02, p=.043). Conclusion : Therefore, to reduce advanced practice nurses' job stress, it is necessary to develop a program and strategies to increase their clinical decision-making abilities.

• Journal of Yeungnam Medical Science
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• v.34 no.1
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• pp.55-61
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• 2017

Background: Smartphone addiction, academic stress and anxiety of university students are increasing gradually; however, few studies have investigated these factors in medical school students. Therefore, this study investigated associations between smartphone addiction scale and sociopsychological aspects in medical school students. Methods: A total of 231 Yeungnam University College of Medicine students were enrolled in this study in March 2017. Gender, school grade, type of residence, and smartphone usage patterns of the students were surveyed. The Korean Smartphone Addiction Proneness Scale and each Korean version scale were used to assess sociopsychological aspects such as loneliness, stress and anxiety. Results: There was a direct statistical correlation between loneliness, stress of negative perception, anxiety and smartphone addiction scales. There was also a negative statistical correlation between stress of positive perception and smartphone addiction scales. There was a higher level of anxiety among female students than male students. Additionally, there was a higher level of stress associated with negative perception and anxiety among medical students in the first grade than other students. Moreover there was a higher level of loneliness, stress of negative perception and anxiety among students who live with friends than students who live with their own family. Conclusion: Smartphone addiction scale and sociopsychological aspects significantly correlated. Moreover, the results suggest that female medical students in the first grade who have been separated from their family need more attention and management of loneliness, stress and anxiety to avoid smartphone addiction.

• Korean Journal of Psychosomatic Medicine
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• v.8 no.1
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• pp.11-19
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• 2000

Objectives : The object of this study was to make a comparison regarding perceived stressor, perceived stress responses, and coping strategies between patients with gastric ulcer and patients with chronic gastritis. Subject and Methods : Subjects consisted of 40 patients with gastric ulcer and 100 patients with chronic superficial gastritis. Global assessment of recent stress(GARS) scale and perceived stress response inventory(PSRI) were used to measure perception for stressors and stress responses. Coping scale was used to measure coping strategies. Results : Scores of perceived stress related to work or job, changes in relationship on GARS scale were significantly higher in patients with gastric ulcer than those with chronic gastritis. Scores of perceived stress responses related to general somatic symptom, specific somatic symptom, passive-responsive and careless behavior on PSRI were significantly higher in patients with chronic gastritis than those with gastric ulcer. Scores of seeking social support, escape-avoidance on coping scale were significantly higher in patients with gastric ulcer than those with chronic gastritis. Conclusion : The above results suggest that perception for stressors were likely to be higher in patients with gastric ulcer than those with gastritis, whereas perception for stress responses were likely to be higher in the latter than the former. It is also suggested that patients with gastric ulcer were likely to use more dependent and passive coping strategies than patients with gastritis.

• Journal of the Korean Society of School Health
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• v.9 no.2
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• pp.171-184
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• 1996

The purpose of this study was to investigate how much students stress have, how they cope with this stress, differences between problem behaviors and personality changes based on stress, and stress differing levels when coping with the situation either actively or passively The hypotheses were stated as follows. 1. There will be differences between problem behaviors and personality problems based on sex. 2 There will be differences between problem behaviors and personality problems based on grade. 3. There will be differences between problem behaviors and personality problems based on stress level. 4. There will be differences between problem behaviors and personality problems based on a student's ability to cope with stress. 5. Upper level students under lower stress and lower level students under higher stress will have more problems behaviors and more personality problems. 300 male/female high school students throughout the Seoul area were randomly selected. Of the 300 subjects that were sampled, 294 (Male=145, Female=149) actually participated in this study. The Stress Scale developed by Lazarus & Folkman (1984) Problem Behavior Scale, Personality Problem Scale, and Checklist were used and the conclusions are stated as follows. First, male students have more anti-social behavior and higher anti-social tendencies than female students and female students have more self-depreciation than male students. Second, upper level students have more anti-social behavior, self-ego, fabrication, and higher personality problems than lower level students. Third, students having too much stress have more anti-social behavior, self-ego, and fabrication and personality problems than students having less stress. Fourth, students coping with stress actively showed less self-ego and fabrication and less thought disturbance, anti-social tendencies, and self-depreciation than students coping with stress passively. Finally, upper level students under lower stress and lower level students under higher stress have more fabrication behaviors and more thought disturbance and self-depreciation.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.499-499
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• 2011

Silicon nanowires (Si NWs) have been extensively studied for nanoelectronics owing to their unique optical and electrical properties different from those of bulk silicon. For the development of Si NW devices, better understanding of oxidation behavior in Si NWs would be an important issue. For example, it is widely known that atomic scale roughness at the dielectric (SiOx)/channel (Si) interface can significantly affect the device performance in the nano-scale devices. However, the oxidation process at the atomic-scale is still unknown because of its complexity. In the present work, we investigated the oxidation behavior of Si NW in atomic scale by simulating the dry oxidation process using a reactive molecular dynamics simulation technique. We focused on the residual stress evolution during oxidation to understand the stress effect on oxidation behavior of Si NWs having two different diameters, 5 nm and 10 nm. We calculated the charge distribution according to the oxidation time for 5 and 10 nm Si NWs. Judging from this data, it was observed that the surface oxide layer started to form before it is fully oxidized, i.e., the active diffusion of oxygen in the surface oxide layer. However, it is well-known that the oxide layer formation on the Si NWs results in a compressive stress on the surface which may retard the oxygen diffusion. We focused on the stress evolution of Si NWs during the oxidation process. Since the surface oxidation results in the volume expansion of the outer shell, it shows a compressive stress along the oxide layer. Interestingly, the stress for the 10 nm Si NW exhibits larger compressive stress than that of 5 nm Si NW. The difference of stress level between 5 an 10 anm Si NWs is approximately 1 or 2 GPa. Consequently, the diameter of Si NWs could be a significant factor to determine the self-limiting oxidation behavior of Si NWs when the diameter was very small.