• Journal of Korean Academy of Nursing
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• 제35권4호
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• pp.701-708
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• 2005

Purpose. This study examined the characteristics of fatigue and the relationship between fatigue and its related factors in Korean patients on hemodialysis. Methods. A cross-sectional correlational study was conducted with 104 patients on hemodialysis in Seoul, Korea. Finding. Of a total of 104 subjects, eighty-one ($77.9\%$) complained of fatigue. Fatigue severity was measured by the self-rating Visual Analogue Scale-Fatigue (VAS-F) with a mean score of 36.5 (SD = 17.49, range 2 - 81). The mean duration of fatigue was 3.8 hours (SD = 5.3, range 0 - 24). Depression was most significantly correlated with fatigue (beta = .43, p<.00), with interdialytic weight gain (beta = .25, p<.05) being the second most significant correlate. Conclusion. This study shows that nursing interventions for patients who experience fatigue while on hemodialysis should be focused on both psychological problems, such as depression, as well as on physiological problems, such as interdialytic weight gain.

• Journal of the Korean Home Economics Association
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• 제48권2호
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• pp.51-62
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• 2010

The primary purpose of this study was to employ an ecological model to analyze relative magnitudes of significant predictors affecting school life satisfaction in Korea Science Academy. The instruments used for this study were school life satisfaction Scale, Self-Efficacy Scale, Relationship Skill Scale, Internal Control Scale, Emotional Intelligence Scale, and FACE IV Scale. Data were collected by purposive sampling of 180 students of the Korea Science Academy in Busan, Korea. The data were analyzed by frequency, percentile, mean, standard deviation, Cronbach' ${\alpha}$, Pearson's productive correlation, hierarchical regression and stepwise regression, using SPSS 15.0+WIN program package. The results were as follows: 1. The level of school life satisfaction in Korea Science Academy was found to be high(Mean = 4.24, SD = 0.57). 2. Model IV was the most powerful. It explained 49.7% of the school life satisfaction. 3. Relationship with friends(${\beta}$ = .443), with teachers(${\beta}$ = .273), and self-efficacy(${\beta}$ = .201) were significant factors in explaining the school life satisfaction. The three variables explained 49.9% of school life satisfaction.

• Korean Journal of Occupational Health Nursing
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• 제11권1호
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• pp.52-62
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• 2002

Purpose: This study was to analyze changes of motivation and health-promoting lifestyle in 3 months after medical examination, and to identify the influencing factors on the change of health-promoting lifestyle. Methods: The subjects of this study were 81 adults who took medical examination at a general hospital health clinic in Cheonan city. The instruments used in this study were the motivation scale and modified HPLP. For data collection, the first survey was conducted from March 16 to April 19, 2001, and the second survey was carried out by mail three months after the medical examination from June 16 to July 19, 2001. Results: 1. The age of the subjects ranged from 26 to 66 years, 71.6% were male, and the major group was office workers(43.2%). 2. The average score of motivation scale was significantly improved in three months to 520.7(SD=82.7). All sub-scales of motivation scale, self-efficacy(t=-4.204, p=.000), perceived benefits(t=-4.263, p=.000), perceived barriers (t=4.305, p=.000), and emotional salience (t=-6.169, p=.000) showed significant improvements in 3 months. 3. The average score of health-promoting lifestyle was significantly increased to 62.5 (SD=9.8) (t=-5.111, p=.000) after 3 months. Health responsibility(t=-6.098, p=.000), eating habit(t=-3.625, p=.001), exercise(t=-2.557, p=.012), and smoking habit(t=-2.157, p=.034) showed significant improvement. But stress management was not changed at the significant level in 3 months(t=-1.832, p=.071). 4. As the result of multiple regression analysis, it was found that perceived barriers, self-efficacy and monthly mean income had a significant influence on health-promoting lifestyle in 3 months after the medical examination. These variables explained 42.4% of variance in health-promoting lifestyle in 3 months after the medical examination. Conclusion: Periodic medical examination and guidance for healthy lifestyle was effective to change the motivation and to improve health promoting lifestyle.

• KIEAE Journal
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• 제10권5호
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• pp.109-114
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• 2010

There are many business in complex building, and recently noise claims have increased in those buildings. It is one of the most desirable methods reducing the noise level to establish the noise criteria considering the admittable noise level between the source and receiving room, which are to be derived from the subjective response in the real conditions. Because the degree of annoyance and loudness for the intruding noises in complex building could be changed with background noise level, it is suggested to be researched the relationship between the noise levels and subjective response. In this study, the subjective response for three different background levels in receiving business or rooms were investigated for the typical eight business noise source including aerobic music. The results can be summarized as follows. In conditions of low background noise level(40 dB(A)), there is a tendency of intentionally attention situation (listening) in a subjective test. The other hand in conditions of relatively high background noise level(50 dB(A)), there is a unconscious situation (heraing). As the degree of moderately heard or annoyed in SD rating scale means that the noise is easily recognized in neighboring shops, usually the limit of noise criteria were decided on this rating point, so it will be reasonable to be adopted the criteria rating scale as slight heard or annoyed degree (SD criteria 3).

• Journal of the Institute of Electronics Engineers of Korea SD
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• 제38권2호
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• pp.9-9
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• 2001

Nano-scale의 게이트 길이를 가지는 MOSFET소자는 접합 깊이가 20∼30㎚정도로 매우 얕은 소스/드레인 확장 영역을 필요로 한다. 본 연구에서는 $As₂^ +$ 이온의 10keV이하의 낮은 에너지 이온 주입과 RTA(rapid thermal annealing)공정을 적용하여 20㎚이하의 얕은 접합 깊이와 1.O㏀/□ 이하의 낮은 면저항 값을 가지는 $n ^+$-p접합을 구현 하였다. 이렇게 형성된 $n^ +$-p 접합을 nano-scale MOSFET소자 제작에 적용 시켜서 70㎚의 게이트 길이를 가지는 NMOSFET을 제작하였다. 소스/드레인 확장 영역을 $As₂^ +$ 5keV의 이온 주입으로 형성한 100㎚의 게이트 길이를 가지는 NMOSFET의 경우, 60mV의 낮은 $V_ T$(문턱 전압감소) 와 87.2㎷의 DIBL (drain induced barrier lowering) 특성을 확인하였다. $10^20$$㎝^ -3$이상의 도핑 농도를 가진 abrupt한 20㎚급의 얕은 접합, 그리고 이러한 접합이 적용된 NMOSFET소자의 전기적 특성들은 As₂/sup +/의 낮은 에너지의 이온 주입 기술이 nano-scale NMOSFET소자 제작에 적용될 수 있다는 것을 제시한다.

• Transactions of the Korean Society of Machine Tool Engineers
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• 제11권5호
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• pp.58-64
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• 2002

Mirror surface finish of Si-wafers has been achieved by rotary in-feed machining with cup-type wheels in ELID grinding. But the diameter of the workpiece is limited with the diameter of the grinding wheel in the in-feed machining method. In this study, some finding experiments by the rotary surface grinding machine with straight type wheels were conducted, by which the possible grinding area of the workpiece is independent of the diameter of the wheels. For the purpose of investigating the grinding characteristics of large scale diametrical silicon wafer, grinding conditions such as rotation speed of grinding wheels and revolution of workpieces are varied, and grinding machine used in this experiment is rotary type surface grinding m/c equipment with an ELID unit. The surface ground using the SD8000 wheels showed that mirror like surface roughness can be attained near 2~6 nm in Ra.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.946-949
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• 2001

Mirror surface finish of Si-wafers has been achieved by rotary in-feed machining with cup-type wheels in ELID grinding. But the diameter of the workpiece is limited with the diameter of the grinding wheel in the in-feed machining method. In this study, some grinding experiments by the rotary surface grinding machine with straight type wheels were conducted, by which the possible grinding area of the workpiece is independent of the diameter of the wheels. For the purpose of investigating the grinding characteristics of large scale diametral silicon wafer, grinding conditions such as rotation speed of grinding wheels and revolution of workpiece are varied, and grinding machine used in this experiment is rotary type surface grinding m/c equipped with an ELID unit. The surface ground using the SD8000 wheels showed that mirror like surface roughness can be attained near 2~6nm in Ra.

• Journal of Korean Academy of Nursing
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• 제32권2호
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• pp.186-195
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• 2002

This study was to identify and clarify the relationship between perceived health, self-esteem, and self-care agencies for promoting self care among Korean adolescents. Method: Data were collected from 817 adolescents in schools located in Seoul, Kyungki-do, and Chuncheon from Sept, 16th to Sept, 28th, 1999, and from Mar 10th to Mar 25th, 2000. The instruments used for this study were the Health Self-Rating Scale, Self-Care Agency Assessment Questionnaire (Denyes, 1981), the Self-Esteem Questionnaire (Rosenberg, 1971). Result: 1) The mean perceived health status among Korean adolescents was 8.75 (SD=1.72) 2) The mean self-esteem was 27.27 (SD=4.64). 3) The mean self-care agency was 99.64 (SD=21.02) and the average self-care agency score was 3.99 (SD=0.84). In the subcategories, the highest degree was feelings towards health (4.15), followed by ego strength (4.06), attending to health (3.87), general health knowledge (3.56), and the lowest degree was specific health knowledge (3.20) 4) There was statistical significant differences between demographic factors and self-care agencies, expecially, gender (t=28.65), grade (F=3.79), pocket money (t=5.72), and height (F=9.82) 5) The statistical relationship between perceived health status, self-esteem, and self-care agencies were found to have a positive correlation. 6) Self-care agencies among adolescents was the highest factor predicting self-esteem (15%). Conclusion: The relationship between perceived health status, self-esteem, and self-care agencies revealed a significant positive correlation among adolescents. Therefore, nursing intervention for adolescents needs to develop self-esteem programs to increase self-care agencies

• Journal of the Korea institute for structural maintenance and inspection
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• 제21권2호
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• pp.95-102
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• 2017

This paper describes the experimental results for the structural performance of full-scale coupling beams with different reinforcement layout (diagonal and horizontal). For the reinforcements of the coupling beams, high-strength steel bars(SD500 and SD600) were used in order to improve workability and economic feasibility. The rigid steel frames and linked joints were used to maintain the clear span length (distance between both shear walls) of the coupling beam during the cyclic loading. Experimental results indicated that the diagonally reinforced coupling beam specimen could exhibit more ductile behavior compared to horizontally reinforced specimen. ACI318-14 code is applicable to design of coupling beam with diagonally reinforcement, however, that is overestimating the strength of horizontally reinforced coupling beam. It is remarkable that effective elastic stiffness values of both reinforcement details coupling beam significantly lees than ASCE 41-13.

• Journal of Korean Academy of Fundamentals of Nursing
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• 제13권3호
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• pp.447-456
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• 2006

Purpose: This study was done to examine symptom experiences and related factors in angina patients. Method: The participants were 92 patients admitted to C university hospital between October and December 2004. The tools used were a questionnaire on symptom experience related to angina developed by Gensini(Coronary Angiographic Gensini Score). Global Assessment of Recent Stress Scale and a tool measuring performance of health behavior. Results: The mean score for symptom experience was relatively low (M=27.65, SD=18.44) as was the score for coronary severity (Gensini score) was 16.30 point (SD=18.04). The mean score for perceived stress was moderate (M=30.16, SD=12.26). Compliance was relatively good in these patients with angina (M=61.55, SD=7.60). Analysis of the correlation of symptom experience showed a statistically significant positive relationship with perceived stress (r=.410, p=.000). There was significant negative relationship (r=-.251, p=.016) between symptom experience and compliance. In the regression analysis, symptom experience was found to be significantly influenced by stress ($R^2$=.168, p=.000), age ($R^2$=.057, p=.002), and economic status ($R^2$=.061, p=.007). These variables explained 26.2% of the variance in symptom experience. Conclusion: The results of this study provide evidence that symptoms of angina can present not only as chest pain itself but also with fatigue, shortness of breath, and sleep disturbance as the most common symptoms.