• Preventive Nutrition and Food Science
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• 제21권1호
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• pp.62-67
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• 2016

Green tea (Camellia sinensis) is one of the most popular beverages in the world and has been acknowledged for centuries as having significant health benefits. (-)-Epigallocatechin-3-gallate (EGCG) is the most abundant catechin in green tea, and it has been reported to have health benefit effects. Peroxisome proliferator-activated receptor ${\gamma}$ coactivator $(PGC)-1{\alpha}$ is a crucial regulator of mitochondrial biogenesis and hepatic gluconeogenesis. The objective of this study was to investigate whether EGCG from green tea can affect the ability of transcriptional regulation on $PGC-1{\alpha}$ mRNA expression in HepG2 cells and 3T3-L1 adipocytes. To study the molecular mechanism that allows EGCG to control $PGC-1{\alpha}$ expression, the promoter activity levels of $PGC-1{\alpha}$ were examined. The $PGC-1{\alpha}$ mRNA level was measured using quantitative real-time PCR. The -970/+412 bp of $PGC-1{\alpha}$ promoter was subcloned into the pGL3-Basic vector that includes luciferase as a reporter gene. EGCG was found to up-regulate the $PGC-1{\alpha}$ mRNA levels significantly with $10{\mu}mol/L$ of EGCG in HepG2 cells and differentiated 3T3-L1 adipocytes. $PGC-1{\alpha}$ promoter activity was also increased by treatment with $10{\mu}mol/L$ of EGCG in both cells. These results suggest that EGCG may induce $PGC-1{\alpha}$ gene expression, potentially through promoter activation.

• 대한간호학회지
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• 제39권1호
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• pp.145-156
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• 2009

Purpose: This study was done to develop a school-based anger management program (SAMP) of 4 sessions and examine its effects on the anger, anger expression, psychosomatic responses, psychosocial responses, and immunologic responses in adolescents. Methods: A quasi-experimental study using a nonequivalent control group, pre-post design with repeated measures was used. Chi-square test, t-test, paired t-test, and Fisher's exact test were used to analyze the data. Results: There were no differences between the experimental and control groups in outcome variables except for lymphocytes. However, following additional analyses, statistically significant differences by time point were observed for pain sensitivity, T cell, Helper T (Th) cell, Suppressor (Ts) cell and Natural Killer (NK) cell post-treatment, entrapment and psychosomatic symptoms at the 4-week follow-up, and resilience at the 10-week follow-up for the experimental group. Conclusion: Although some modifications in contents and administration will be required to increase the effectiveness of the program for anger management, SAMP can be used to promote anger management ability in adolescents.

• 한국건설관리학회논문집
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• 제10권5호
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• pp.85-94
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• 2009

최근 국내의 건설회사는 건설경기 침체와 국제금융시장의 연이은 악재로 인해 많은 어려움을 호소하고 있어, 보다 더 세계화되고 국제 경쟁력을 갖춘 건설생산체계를 요구하고 있는 실정이다. 과거 우리나라 건설산업의 선진화 도구로 건설사업관리(CM) 제도가 도입되었다. 하지만, 전 방위적인 노력에도 불구하고 용역형 건설사업관리(CM for Fee)에 국한된 모습을 보이고 있다. 이에 따라 발주방식의 다양성이 요구되고 책임형 건설사업관리(CM at Risk) 발주방식의 도입 필요성이 제기되고 있다. 따라서 본 연구에서는 책임형 건설사업관리 발주방식의 수행 가능성이 높은 대형건설회사를 대상으로 경험과 지식수준, 건설사업관리 세부업무의 중요도 및 현재 역량과 미래 요구 역량수준을 각각 건축분야와 토목분야로 나누어 분석하였고, 이에 따른 역량 강화를 위한 항목을 도출하였다.

• 의학교육논단
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• 제24권3호
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• pp.205-214
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• 2022

The purpose of this study was to analyze the results of a study on the psychological state, lifestyle, self-management ability, and academic adaptation of medical students, and to present examples of improvement of a student support center based on the results. A medical school in Daegu has been surveying the living conditions of students every year for 6 years since 2016. More than 60% of medical students experienced depression and more than 70% experienced stress, but these rates have significantly improved over the past 5 years. There were many cases of drinking or smoking to relieve stress, but the frequency of drinking recently decreased substantially. Some students had difficulties in emotional regulation (11.5%) and time management (16.6%), and challenges in planning and self-management increased significantly during the coronavirus disease 2019 (COVID-19) pandemic. The satisfaction and adaptability of medical students are high, but the number of students who are not satisfied with but negative response rate is 2%-3% in every year. However, satisfaction has significantly increased in tandem with curriculum changes and COVID-19. Based on these data, the counseling system was reorganized to support psychological stability, the medical humanities curriculum was improved, and changes in actual quality of life were induced by developing and operating non-curricular programs. Furthermore, standardized questionnaires will be developed and data from many medical schools will be shared, which is expected to support medical students more effectively.

• 가족자원경영과 정책
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• 제20권4호
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• pp.35-47
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• 2016

This research aimed to observe adolescent children's use of time and to discover the parent-related factors that affect adolescent children's use of time. The subjects included 2,092 fourth-grade elementary school students and 2,108 first-grade middle school students. We used data from the Korean Children and Youth Panel Survey. We tested sociodemographic factors, parents characteristics, and time usage, and we studied these factors using SPSS version 23.0; the results are as follows. Firstly, in the subordinate scope of the child-rearing attitude of parents, affection fourth-grade elementary school students(M = 1.83) and first-grade middle school students(M = 2.02). Inconsistency had an effect on fourth-grade elementary school students(M = 1.99), and first-grade middle school students(M = 2.12). Excessive expectations had an effect on fourth-grade elementary school students(M = 2.40) and first-grade middle school students(M = 2.55). Over-involvement had an effect on fourth-grade elementary school students(M = 2.68)and first-grade middle school students(M = 2.80). Finally, giving reasonable explanations had an effect on fourth-grade elementary school students(M = 1.51)and first-grade middle school students(M = 1.68). Secondly, in fourth-grade elementary school students(M = 463.35) and first-grade middle school students(M = 378.75). Further, studying hours during weekdays had an effect on fourth-grade elementary school students(M = 456.15) and first-grade middle school students(M = 460.86). Free activity hours during had an effect on fourth-grade elementary school students(M = 390.54) and first-grade middle school students(M = 387.11). Sleeping hours during holidays had an effect on fourth-grade elementary school students(M = 544.85) and first-grade middle school students (M = 511.74). Studying hours during holidays had an effect on fourth-grade elementary school students (M = 484.86) and first-grade middle school students (M = 511.74). Free activity hours during holidays had an effect on fourth-grade elementary school students(M = 518.68) and first-grade middle school students(M = 509.73). Thirdly, by observing the relative influence of related factors on adolescent children's use of time, grade(${\beta}$ = -.284), gender(${\beta}$ = -.208), over-involvement(${\beta}$ = -.380), supervising(${\beta}$ = -.217), and (${\beta}$ = .243) in terms of the child-rearing attitudes of parents was found to affect study hours($F=2.595^{**}$). The education level of fathers(${\beta}$ = -.144) results in(${\beta}$ = 1.991) and longer free activity hours for children($F= 4.116^{***}$). This research can be used to study the influence of parents'child-rearing attitudes on adolescent children's use of time and to suggest the role of parents in adolescents' ability to manage time effectively using practical.

• 디지털융복합연구
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• 제19권9호
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• pp.393-400
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• 2021

본 연구의 목적은 초산모의 모아애착을 향상시킬 수 있는 프로그램 개발 대한 기초자료를 제공하는 것이다. 본 연구는 서술적 조사연구로서, 2021년 4월 1일부터 5월 31일까지 S 시의 초산모 148명을 대상으로 데이터를 수집했다. 통계분석에는 기술통계와 t-test, ANOVA, 상관관계, 단계적 회귀분석을 이용하였다. 본 연구 결과 모아애착은 산모 피로도(r=-.65, p<.001) 및 불안정도(r=-.62, p<.001) 와는 음의 상관관계가 있었다. 초산모의 모아애착에는 산모 피로도(β=-.52), 불안정도(β=-.48), 육아도우미 유무(β=.10)가 영향을 미치는 것으로 나타났으며, 회귀분석 결과, 설명력은 64.3%(F=89.19, p<.001)이었다. 본 연구의 결과로 나타난 초산모의 모아애착에 영향을 미치는 요소를 기반으로 산모 피로와 불안감을 줄이고 모아애착을 향상시키는 중재프로그램을 개발할 필요가 있다.

• Smart Structures and Systems
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• 제32권4호
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• pp.253-266
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• 2023

The time-reversal method is employed to improve the ability of pipeline defect detection, and a new approach of identifying the pipeline defect depth is proposed in this research. When the L(0,2) mode ultrasonic guided wave excited through a lead zirconate titinate (PZT) transduce array propagates along the pipeline with a defect, it will interact with the defect and be partially converted to flexural F(n, m) modes and longitudinal L(0,1) mode. Using a receiving PZT array attached axisymmetrically around the pipeline, the L(0,2) reflection signal as well as the mode conversion signals at the defect are obtained. An appropriate rectangle window is used to intercept the L(0,2) reflection signal and the mode conversion signals from the obtained direct detection signals. The intercepted signals are time reversed and re-excited in the pipeline again, result in the guided wave energy focusing on the pipeline defect, the L(0,2) reflection and the L(0,1) mode conversion signals being enhanced to a higher level, especially for the small defect in the early crack stage. Besides the L(0,2) reflection signal, the L(0,1) mode conversion signal also contains useful pipeline defect information. It is possible to identify the pipeline defect depth by monitoring the variation trend of L(0,2) and L(0,1) reflection coefficients. The finite element method (FEM) simulation and experiment results are given in the paper, the enhancement of pipeline defect reflection signals by time-reversal method is obvious, and the way to identify pipeline defect depth is demonstrated to be effective.

• 디지털융복합연구
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• 제18권4호
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• pp.55-65
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• 2020

본 연구에서는 냉동·냉장창고의 서비스품질 향상을 위한 요인을 도출하고, 냉동·냉장화물을 취급하는 화주사 및 운영사의 서비스품질 향상에 대한 인식차이를 분석한다. 이를 바탕으로 IPA분석(Importance-Performance Analysis)분석을 활용하여 냉동·냉장화물 서비스품질 향상을 위한 개선방안을 제시하는 것을 목적으로 한다. 연구결과 총 15개 분석요인을 도출하였으며, 독립표본 T-test 결과, 화주사와 운영사 간의 품질향상을 위한 인식에는 차이가 없다는 것을 확인하였다. 또한 IPA분석 결과, 최우선 투자영역에 온·습도유지, 가변적 보관공간 확보, 입·출고 정시성, 정보서비스 제공 등 4개의 요인이 도출되었다. 한편 재고관리 서비스능력, 입출고 정시성, 화물을 안정적으로 보관할 수 있는 능력의 경우 시급한 개선이 필요한 것으로 분석되었다. 본 연구는 서비스 품질향상을 위한 실무적인 개선점을 제시하였다는 점에서 산업적인 시사점을 갖는다.

• 감성과학
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• 제12권4호
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• pp.373-380
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• 2009

본 연구에서는 세 단계의 각성 수준이 3-back 과제 수행능력에 어떠한 영향을 미치는지 관찰하고자 하였다. 10명의 남자(평균 $25.7{\pm}1.5$세) 대학생과 10명의 여자(평균 $24.5{\pm}1.8$세) 대학생이 본 실험에 참여하였다. 집단검사를 통해 추출된 사진을 이용하여 세 단계의 각성 수준 즉, 긴장, 중립, 이완감성을 유발하였다. 모든 피험자는 각 각성 수준에 대해 한 번씩, 총 3번의 실험에 참여하였다. 안정1(2분), 각성유발사진제시1(2분), 3-back 과 제1(2분), 각성유발사진제시2(2분), 3-back 과제2(2분), 안정2(2분)의 6단계로 실험이 진행되었고, 전 단계에서 피부전도수준(skin conductance level: SCL)도 함께 측정하였다. 3-back 과제의 정답률은 중립 조건일 때 가장컸고, 이완, 긴장 조건 순서였다. 반응시간은 세 조건 간의 차이가 나타나지 않았다. 모든 구간에서 측정된 피부전도수준은 긴장 조건일 때 가장 컸고, 중립, 이완 순서로 나타남으로써, 사용된 각성유발사진이 적절한 각성수준을 유발하였음을 확인하였다. 본 연구결과로부터 인지 처리와 무관하게 유발된 긴장도의 증가나 감소는 과제 수행능력을 감소시킬 수 있다는 사실을 유추할 수 있다.

• 영재교육연구
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• 제26권1호
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• pp.1-20
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• 2016

본 연구는 소외계층 영재의 인지적 특성과 학습요구 탐색을 목적으로 한다. 일반영재 99명, 소외영재 43명, 일반학생 50명에게 지능, 창의성, 상위인지, 인식론적 신념, 과제 선호도, 개인시간 활용에 대한 검사를 실시하였다. 소외영재는 지능 검사에서 다른 집단보다 점수 향상이 빠르게 나타나 추상화 능력이 뛰어남을 알 수 있었다. 소외영재는 토랜스 창의성 도형 검사에서 일반영재만큼 높은 점수를 보였으나, 언어 검사에서는 일반영재보다 낮은 점수를 보였다. 소외영재는 노력, 학습 능력, 전체 학습계획, 통합적 지식이 학습에서 중요한 것으로 인식하였지만, 일반영재에 비해 학습관리와 책략 같은 상위인지 기술과 합리적인 작업의 가치에 대한 인식론적 신념이 낮고 학습시간도 적었다. 독창적인 과제는 선호하나 어려운 것을 기피하는 소외영재의 성향을 고려하여 다양하게 접근하는 과제를 활용하거나 과제를 단계적으로 제시할 필요가 있으며, 언어능력 신장, 학습내용의 실제 생활에의 적용, 상위인지 기술 개발 등이 소외계층 영재를 위한 지도 방안으로 제안된다.