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임상연구 : Sevoflurane 흡입마취유도 시 동맥압 변화의 기전 평가: Modelflow 방법을 이용한 혈역학 변수의 Beat-to-Beat 분석
김영국 ( Young Kug Kim ),윤미옥 ( Mi Ok Youn ),서형석 ( Hyung Seok Seo ),최재혁 ( Jae Hyuk Choi ),최병문 ( Byung Moon Choi ),신원정 ( Won Jung Shin ),도경준 ( Kyung Jun Do ),조선준 ( Sun Joon Cho ),강수진 ( Su Jin Kang ),전인구 ( 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.1
Background: A modelflow method provides beat-to-beat analysis of cardiovascular variables based on arterial pulse pressure analysis. In this study, we assessed the mechanism of arterial blood pressure (ABP) change during sevoflurane induction by the analysis of beat-to-beat hemodynamic changes using a modelflow method. Methods: Beat-to-beat ABP was measured during a stable conscious state (baseline) and vital capacity induction with sevoflurane 6 vol% and oxygen 8 L/min in 18 healthy living liver transplant donors. Alterations of beat-to-beat systolic ABP, mean ABP, diastolic ABP, heart rate (HR), stroke volume (SV), cardiac output (CO), and total peripheral resistance (TPR) by sevoflurane induction were estimated noninvasively using a modelflow method simulating aortic input impedance from an ABP waveform. Results: After sevoflurane induction, ABP, SV, CO, and TPR decreased significantly (all P < 0.05), but HR did not change significantly. After tracheal intubation, ABP, CO, and TPR did not change significantly compared with baseline, but HR increased and SV decreased significantly (both P < 0.05). Conclusions: Using a modelflow beat-to-beat analysis of cardiovascular variables, we found that ABP did not change significantly compared to baseline after tracheal intubation during sevoflurane induction, indicating the counteraction of increased HR and decreased SV, and that the reduction of SV by tracheal intubation suggests the suppression by increased HR and TPR compared with that after sevoflurane induction. (Korean J Anesthesiol 2006; 51: 17~23)
향상초점과 예방초점 잡크래프팅(Job Crafting)의 차별적 효과: 이직의도에 대한 업무통합성과 직무긴장감의 이중매개효과와 상사지지의 조절효과를 중심으로
김영국(Kim, Young Kug),김명소(Kim, Myoung So) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.1
본 연구의 목적은 기존의 순기능 측면을 중심으로 연구되었던 잡크래프팅(job crafting)을 역기능 측면도 함께 탐색하기 위해 잡크래프팅을 향상초점(promotion focus)과 예방초점(prevention focus)으로 나누어 두 초점이 이직의도에 미치는 차별적 영향과 그 과정을 밝히는 것이다. 구체적으로 향상초점 잡크래프팅과 예방초점 잡크래프팅이 업무통합성과 직무 긴장을 매개하여 이직 의도에 영향을 미친다는 순차적 이중매개모형을 제안하였다. 또한 예방초점 잡크래프팅의 역기능을 줄일 수 있는 변인으로 상사지지에 대한 조절효과 여부를 확인하고자 하였다. 이를 위해 국내 다양한 직종의 현직자 293명을 대상으로 온라인 설문조사를 실시하였다. 분석결과 향상초점 잡크래프팅은 이직의도에 부적 영향을 미친 반면, 예방초점 잡크래프팅은 직접적으로 정적 영향을 미쳤다. 향상초점 잡크래프팅과 예방초점 잡크래프팅 모두 업무통합성과 직무 긴장을 순차적으로 부분 매개하여 간접적으로도 영향을 미치는 것으로 나타나 순차적 이중매개 모형을 검증하였다. 또한, 상사지지는 예방초점 잡크래프팅이 업무통합성에 미치는 부정적 영향을 완화하고 두 변인의 관계를 정적으로 변화시켜 상사지지의 조절효과가 입증되었다. 이를 바탕으로 본 연구의 시사점과 향후 연구 방향을 논의하였다. The purpose of this study was to explore the dysfunctional effects of job crafting by examining (1) the sequential dual mediating effect of work-related sense of coherence (Work-SoC) and job strain on the relationship between two dimensions of job crafting (i.e., promotion focus & prevention focus) and turnover intentions, and (2) the moderating effect of supervisor support in the relationship between each focus and Work-SoC. A total of 293 employees working at various companies in Korea participated in an online survey. The results showed that promotion-focus job crafting had a direct negative effect on turnover intention, while prevention-focus job crafting had a direct positive effect. Both promotion-and prevention-focus job crafting also had indirect effects on turnover intention by partially mediating Work-SoC and job strain. Supervisor support had a moderating effect on the relationship between prevention-focus job crafting and Work-SoC, weakening the negative effect of prevention focus on Work-SoC. The implications and future directions are discussed on the basis of the results.
박영일(Park Young-Il),김영국(Kim Young-Kug),전준석(Jun Joon-Seok),이기복(Lee Ki-Bok) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.2
This study was done through the analysis of middle and high school weight lifters who entered any national sport contest from March of 2000 to October of 2000. The total 397 students. The Sport Competition State Anxiety Inventory Ⅱ(SCSAI-Ⅱ) were used for testing the level of the competition anxiety by personal experience, superior or non-superior, and weight loss. The findings from the tests are shown below. The result of sport competition state anxiety is as follows: 1. While the level of cognitive and physical state anxieties, which indicates the lowest level of competition state anxiety by personal experience, was high to the 4years above groups, that of state confidence was to high to the 4 years above groups. 2. While the level of cognitive and physical state anxieties, which indicates the lowest level of competition state anxiety by personal experience, was high to the non-superiors, that of state confidence was to high to the superiors. 3. While the level of cognitive and physical state anxieties, which indicates the lowest level of competition state anxiety by personal experience, was high to those who have lost weight, that of state confidence was high to those who have not lost weight.
고낙원(Ko Rack-Won),김영국(Kim Young-Kug),전준석(Jun Joon-Seok) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.2
The purpose of this study was to analyze the effects of a general motor ability progress after 12 week rope-skipping exercise program, simple rope-skipping exercise, and school curriculum of physical education program. The following conclusions were drawn : 1. About the physical fitness progress effect of 60m run, two-way interaction result was not showed statistically significant difference. 60m run was not showed statistically significant difference both periods and training groups. 2. About the physical fitness progress effect of flexibility, regardless of a periods and training groups, was not showed statistically significant difference at the level of p>.05, and two-way interaction result was not showed statistically significant difference. 3. About the physical fitness progress effect of Harvard Step test, two-way interaction result was not showed statistically significant difference. The physical fitness progress of 600m run, among the periods was showed statistically very significant difference at the level of p<.001, among the training groups was showed statistically significant difference at the level of p<.001. 4. About the physical fitness progress effect of sit-up, two-way interaction result was not showed statistically significant difference. The sit-up of among the periods was showed statistically very significant difference at the level of p<.001, however the sit-up of among the training groups was not showed statistically significant difference.
정성국(Jeong Seong-Kug),김영국(Kim Young-Kook) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.1
The aim of study was to analyze the factor of physical fitness according to Tae Kwon Do class program for 12 week training. Subjects of this study of C elementary school in Kangwondo organized 30, control group and 30 compared group. After training, the conclusions were as follows; 1. In strength, the grip strength of left showed that controlled group was 17.9±1.1㎏, and comparative group was 18.0±1.1㎏. The grip strength of right showed that controlled group was 18.3±1.3㎏, and comparative group was 18.4±1.0㎏. Consequently, The difference of average between controlled and comparative groups was not showed statistically significant difference. 2. In sits-up, controlled group was 29.7±2.1, and comparative group was 30.9±2.3. Consequently, The difference of average between controlled and comparative groups was showed statistically significant difference. 3. In shuttle-run, controlled group was 13.3±1.0sec, and comparative group was 12.7±0.8sec. Consequently, The difference of average between controlled and comparative groups was showed statistically significant difference. 4. In standing broad, controlled group was 43.5±4.5㎝, and comparative group was 45.8±6.0㎝. Consequently, The difference of average between controlled and comparative groups was showed statistically significant difference. 5. In 800M run, controlled group was 234.0±4.1sec, and comparative group was 231.9±4.2sec. Consequently, The difference of average between controlled and comparative groups was not showed statistically significant difference. 6. In trunk flexion, controlled group was 13.9±1.9㎝, and comparative group was 16.1±2.5㎝. Consequently, The difference of average between controlled and comparative groups was showed statistically significant difference. 7. In stork stand, controlled group was 28.6±2.6sec, and comparative group was 29.4±3.0sec. Consequently, The difference of average between controlled and comparative groups was not showed statistically significant difference.
임상연구 : 건강한 자원자에서 마그네슘 정주에 따른 혈역학 및 자율신경계 변화
김태희 ( Tae Hee Kim ),강수진 ( Su Jin Kang ),상보현 ( Bo Hyun Sang ),신원정 ( Won Jung Shin ),김영국 ( Young Kug Kim ),황규삼 ( Gyu Sam Hwang ),한성민 ( Sung Min Han ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.6
Background: Magnesium has been used for treatments and preventions of various situations, such as cardiovascular disease and pre-eclampsia. And it also used for decreasing demands of anesthetics and analgesics during anesthesia. Activity of autonomic nervous system has important roles for homeostasis of cardiovascular system, and its dysfunction affects mortality and morbidity. Because there are few reports about effects of magnesium infusion on autonomic nervous system, we investigated effects of magnesium infusion on hemodynamic and autonomic changes using variable autonomic function tests in healthy volunteers. Methods: Hemodynamic parameters, heart rate variability, blood pressure variability, and baroreflex sensitivity were evaluated before and after magnesium infusion of 30 mg/kg during 20 min in twenty healthy volunteers. Cold face test, valsalva maneuver were also performed before and after magnesium infusion. Results: Low-frequency components of blood pressure variability decreased after magnesium infusion (P = 0.026). There were no significant differences in blood pressure, heart rate, cardiac output, stroke volume, total peripheral resistance, heart rate variablility and baroreflex sensitivity between before and after magnesium infusion. Increases of diastolic blood pressure during cold face test decreased significantly after magnesium infusion (P = 0.022). In addition, no significant hemodynamic and autonomic changes were found during valsalva maneuver. Conclusions: Central sympathetic vasomotor tone decreased after magnesium infusion of 30 mg/kg during 20 min in healthy volunteers. However, it had no effects on parasympathetic system and baroreflex sensitivity. (Korean J Anesthesiol 2008; 55: 691~9)