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대학생의 우유부단과 경험회피의 관계에서 목표추구지향성의 매개효과
정미희(Mi Hee Jung) 한국심리치료학회 2020 한국심리치료학회지 Vol.12 No.1
본 연구는 대학생의 우유부단과 경험회피의 관계에서 목표추구지향성(성장추구지향성, 확인추구지향성)의 매개 효과를 확인하고자 하였다. 이를 위하여 전국의 대학생 671명을 대상으로 우유부단 척도(FIS), 목표추구지향성 척 도(GOI), 한국판 다차원적 경험회피 척도 단축형(K-MEAQ-24)로 구성된 자기보고식 설문지를 실시하였다. 자료 분석은 상관관계 분석, 위계적 회귀분석을 사용하였고, 주요 연구 결과는 다음과 같다. 첫째, 우유부단, 경험회피, 목표추구지향성 간에는 통계적으로 유의한 상관이 있었다. 둘째, 우유부단이 경험회피에 유의미한 정적 영향을 미치는 것을 확인하였다. 셋째, 우유부단과 경험회피의 관계에서 목표추구지향성의 부분 매개효과를 확인하였다. 이러한 연구결과를 바탕으로 본 연구의 의의와 제한점 및 후속 연구에 대한 제안을 논의하였다 This study was intended to examine the mediation effect of goal-seeking orientation (growth-seeking orientation, validation-seeking orientation) between indecisiveness and experiential avoidance in university students. For this research, samples of 671 university students in all parts of Korea were asked to complete the Frost’s Indecisiveness Scale(FIS), Korean Multidimensional Experiential Avoidance Questionnaire-24(K-MEAQ-24), Goal Orientation Inventory(GOI). The data were analyzed using correlation analysis and regression analysis, the result is as follows. First, indecisiveness, experiential avoidance, goal-seeking orientation displayed statistically significant correlation. Second, it was verified that indecisiveness had a positive effect on experiential avoidance. Third, goal- seeking orientation has a mediating effect on the relationship between indecisiveness and experiential avoidance. Based on such results, the significance and limitations of this study and proposal of follow-up study were discussed.
초등학교 비만아동을 위한 비만관리프로그램이 혈중지질농도 변화에 미치는 효과
정미희(Jung, Mi-Hee),한상숙(Han, Sang-Sook),임소희(Lim, So-Hee) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.12
본 연구는 초등학교 5~6학년 비만아동에게 식이요법, 운동요법 및 행동수정요법을 포함한 비만관리프로그램을 주 1회씩 12회에 걸쳐 시행한 실험군과 줄넘기 운동만을 적용한 대조군을 비교·확인하는 비동등성 대조군 전후시차 설계 연구이 다. 효과를 확인하기 위해 혈중지질농도를 측정하였으며, 수집된 자료는 SPSS Windows 18.0 Program을 이용하여 χ²-test, t-test, ANOVA, Pairwise Comparisons으로 분석하였다. 비만관리프로그램은 총콜레스테롤은 대조군(m=40.7)이 실험군 (m=16.95)에 비해 더 큰폭으로 증가하였으며(F=4.21, p=.049), 중성지방은 실험군이 21.55㎎/㎗가 감소하였으나, 대조군은 37.45㎎/㎗가 증가하였다(F=4.25, p=.049). 본 프로그램을 기초로 수정 보완하여 활용한다면 학교건강증진사업의 일환으로서 실효성을 거둘 수 있을 것으로 기대한다. This study was designed to examine the effects of weight reduction programme(WRP) for obese primary school students on serum lipid level. This research used non-equivalent control group non-synchronized design that was conducted on two groups comprising 5th and 6th graders: an experimental group that received 12-week long WRP that combines diet, exercise and behavior modification therapy and the control group that did only rope-jumping. The collected data were analysed using χ²-test, t-test, ANOVA, Pairwise Comparsons by SPSS 18.0 Programme. It was proven that the WRP of this study was effective in lowering the total cholesterol(F=4.21, p=.049) and triglyceride(F=4.25, p=.049). WRP may be used as a basis for further studies that may be conducted after intervening the motivation level of the study subjects.
최철,정미희,최영민,오제명,Choi, Cheol,Jung, Mi-Hee,Choi, Young-Min,Oh, Jae-Myung 한국재료학회 2008 한국재료학회지 Vol.18 No.11
Oil-based nanofluids were prepared by dispersing Ag, graphite and carbon black nanoparticles in lubricating oil. Agglomerated nanoparticles were dispersed evenly with a high-speed bead mill and/or ultrasonic homogenizer, and the surfaces of the nanoparticles were modified simultaneously with several dispersants. Their tribological behaviors were evaluated with a pin-on-disk, disk-on-disk and four-ball EP and wear tester. It is obvious that the optimal combination of nanoparticles, surfactants and surface modification process is very important for the dispersity of nanofluids, and it eventually affects the tribological properties as a controlling factor. Results indicate that a relatively larger size and higher concentration of nanoparticles lead to better load-carrying capacity. In contrast, the use of a smaller size and lower concentration of particles is recommended for reducing the friction coefficient of lubricating oil. Moreover, nanofluids with mixed nanoparticles of Ag and graphite are more suitable for the improvement of load-carrying capacity and antiwear properties.
탄소 나노소재를 이용한 윤활유 기반 나노유체의 제조 및 평가
최철,정미희,오제명,Choi, Cheol,Jung, Mi-Hee,Oh, Jae-Myung 한국재료학회 2009 한국재료학회지 Vol.19 No.3
Lubricant-based nanofluids were prepared by dispersing carbon nanoparticles in gear oil. In this study, the effects of the particle size, shape and dispersity of the particles on the tribological properties of nanofluids were investigated. Dispersion experiments were conducted with a high-speed bead mill and an ultrasonic homogenizer, and the surfaces of the nanoparticles were simultaneously modified with several dispersants. The effective thermal conductivity of the nanofluids was measured by the transient hot-wire method, and the tribological behaviors of the nanofluids were also investigated with a disk-on-disk tribo-tester. The results of this study clearly showed that the combination of the nanoparticles, the deagglomeration process, the dispersant and the dispersion solvent is very important for the dispersity and tribological properties of nanofluids. Lubricant-based nanofluids showed relatively low thermal conductivity enhancement, but they were highly effective in decreasing the frictional heat that was generated. For nanofluids containing 0.1vol.% graphite particles in an oil lubricant, The friction coefficient in the boundary and fluid lubrication range was reduced to approximately 70% of the original value of pure lubricant.
김정훈,최재영,최영식<SUP>1<,SUP>,정미희<SUP>2<,SUP>,정경순<SUP>2<,SUP>,Jung Hoon Kim,M,D,Jae Young Choi,M,D,Young Sik Choi,M,D,<SUP>1<,SUP>,Mi Hee Jung,M,D,<SUP>2<,SUP> and Kyung Soon Jung,M,D,<SUP>2<,SUP> 대한갑상선-내분비외과학회 2011 The Koreran journal of Endocrine Surgery Vol.11 No.1
Purpose: Ultrasound (US) elastography is a newly developed imaging technique for assessing tissue stiffness by measuring the degree of the tissue's deformation in response to the application of an external force. This technique has recently been applied for making the diagnosis of nodular thyroid disease. The purpose of this study was to evaluate the diagnostic utility of US elastography for differentiating benign thyroid nodules from malignant thyroid nodules. Methods: A total of 63 consecutive patients with thyroid nodules and who were referred for surgical treatment were examined in this study. Seventy-five nodules in these patients were examined by US B-mode, color Doppler US and US elastography. The final diagnosis was obtained from the histologic findings. The tissue stiffness on ultrasound elastography was scored from 1 (elasticity in the whole nodule) to 5 (no elasticity in the nodule and in the posterior shadowing). Results: On US elastography, 18 of 32 benign nodules (56.3%) had a score of 1 to 3, whereas 23 of 43 malignant nodules (62.8%) had a score of 4 to 5. With applying a US elastography score of 4-5 as an indicator for malignancy, the sensitivity, specificity, positive predictive value and negative predictive value of US elastography were 65.9%, 52.9%, 62.8% and 56.3%, respectively. Of the 14 follicular tumors, 12 were follicular adenoma and four were follicular carcinoma. The sensitivity and specificity of US elastography for diagnosing follicular carcinoma were 50.0% and 81% (56=69), respectively. The positive and negative predictive values were 55.2% (16=29) and 60.0%, respectively. The accuracy of the technique was 57.1%. The findings of US elastography were not significantly correlated with the histopathologic findings. Conclusion: This study has shown that US elastography may be not useful for differentiating between benign and malignant thyroid nodules. Further studies are needed to confirm the usefulness of US elastography for making the differential diagnosis of thyroid nodules. (Korean J Endocrine Surg 2011;11:12-17)