• 대한통합의학회지
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• 제7권4호
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• pp.33-41
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• 2019

Purpose : The muscle strength of iliopsoas (IL) was measured commonly in sitting position with hip and knee flexed 90°. However, there is no study to determine the muscle strength of IL in various test positions. Therefore, the purpose of this study was to compare the muscle strength of IL and muscle activity of rectus femoris (RF) according to test position and knee flexion angle. Methods : Twenty healthy subjects were participated for this study. The muscle strength of IL and muscle activity of RF were measured by hand-held dynamometer and surface electromyography during maximum voluntary isometric contraction (MVIC) of IL, respectively. The muscle strength of IL and muscle activity of RF was measured in 4 conditions as follows; 1) knee flexion angles 90 ° in supine, 2) 130 ° in supine position, 3) 90 ° in sitting, 4) 130 ° in sitting. Each condition were performed randomly by three repetitions. Results : The muscle strength of the IL was the main effect on the test position and knee flexion angle (p<.05), and the muscle activity of RF was the main effect only on the knee flexion angle (p<.05). There was also no interaction between the factors (p>.05). In supine position, the muscle strength of IL in knee flexion 130 ° was significantly less than that in knee flexion 90 ° (p<.0125). In knee flexion 90 °, the muscle strength of IL in supine position was significantly greater than that in sitting position (p<.0125). The muscle activity of RF in knee flexion 130 ° was significantly less than that in knee flexion 90 ° in supine and sitting positions (p<.0125). Conclusion : When the muscle strength of IL was measured in clinic and sports fields, the supine position with knee flexion 130 ° was recommended to prevent the muscle activation of RF and to maintain the trunk stability.

• 한국문헌정보학회지
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• 제49권3호
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• pp.209-231
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• 2015

본 연구는 일상생활에서의 신문 읽기 및 NIE 활동이 체계화되고 활성화되기 위해서는 학교, 지방자치단체나 정부의 적극적인 참여와 협조가 필요하다는 전제 하에, 독서 운동과 NIE 활동 간의 연계 방안을 모색하고 활용하기 위한 방편으로 실시되었다. 이러한 연구 목적 달성을 위하여 문헌 연구와 조사 연구 등이 실시되었으며, 참고 자료를 통해서는 독서 운동과 NIE 활동의 개념, 문제점, 그리고 향후 독서 운동과 NIE 활동의 연계 방안에 도움을 줄 수 있는 시사점을 도출해 보았다. 독서 운동과 NIE 활동의 연계 방안은 다음과 같다. 첫째, 다양한 프로그램을 개발해야 한다. 둘째, 학습 자료를 개발해야 한다. 셋째, 온라인 자료 및 교육프로그램을 구축해야 한다. 넷째, 협력체계를 구축해야 한다. 다섯째, 연수 프로그램을 강화해야 한다. 여섯째, 홍보를 강화해야 한다. 이상과 같은 활성화 방안을 통한 지속적인 논의와 관심을 가지고 독서 운동과 연계한 프로그램이 개발 및 운영될 때 진정한 의미에서의 NIE 활동이 활성화 될 것이다.

• 정보교육학회논문지
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• 제6권1호
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• pp.117-126
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• 2002

말하기 기능은 학교 생활에서 자기 표현의 중요하고 의미있는 수단이다. 말하기 기능이 뒤떨어져 학교에서 성공적이지 못한 생활을 하는 학생들이 적지 않은 편이다. 컴퓨터와 헤드셋이라는 멀티미디어 기기를 이용하여 웹의 특성인 하이퍼미디어를 활용하고 사운드그래픽을 보면서 말하기 활동을 수행함으로써 학생들의 흥미와 참여도를 극대화하는 웹기반 말하기 학습시스템을 설계하여 실험적으로 적용하였다. 본 연구에서 제안된 시스템은 자기조절이론, 구성주의 학습 이론, 웹기반 교육이론을 바탕으로 교사모듈, 학습자모듈, 평가모듈로 설계하였으며 초등학교 4학년 44명을 상위집단, 중위집단, 하위집단으로 나누어 실험적으로 적용한 결과 말하기 기능 신장에 효과가 있었다.

• 대한산업공학회지
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• 제37권2호
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• pp.105-117
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• 2011

This study describes behavioral characteristics of Korean population over twenty years old in a variety of activities of daily living by analyzing the raw data of the time use survey provided by Statistics Korea (KOSTAT). Seven activities and forty four sub-activities of daily living were selected for analysis : personal care, employment, household care, family care, voluntary work and community participation, social life, recreation and leisure, and travel. In order to quantitatively understand how Korean adults spend their time for a day and how their lifestyle changes over time, we collected the time recorded by 3,673 respondents in three surveys over the past ten years (in 1999, 2004, and 2009). Then, we performed analysis of variance to compare the behavioral characteristics by user age and gender based on the mean time of each activity. The differences in behavior among user groups and over time could be used to design ergonomic products and services based on user experience, especially for universal design of housing and transportation facilities.

• Asian Pacific Journal of Cancer Prevention
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• 제14권1호
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• pp.87-89
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• 2013

Glutathione S-transferases (GSTs) constitute a multigene family of multifunctional phase II metabolic enzymes. GSTT1, an important member of this group has a wide range of substrates including carcinogens. Total homozygous deletion or null genotype resulting in total lack of enzyme activity exists in populations for this enzyme. Since the null genotype may contribute to lower detoxification of carcinogens, this genotype is expected to increase cancer risk. The frequency of the GSTT1 null genotype is known to vary significantly among populations. However, little is known about its distribution in the hilly Kumaun region of northern India. Therefore, in this study, we determined the prevalence of the GSTT1 null polymorphism in the Kumaun popilation by conducting duplex PCR in 365 voluntary healthy individuals. The GSTT1 null genotype was detected in 18.4% of the individuals. Since GSTs play significant role in xenobiotic metabolism, the present data on GSTT1 genotype distribution should contribute in understanding genetic association with cancer risk in this understudied population.

• 한국융합학회논문지
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• 제8권10호
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• pp.311-321
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• 2017

최근 소통과 배려를 통하여 타인과 행복한 삶을 영위하기 위한 방법으로 재능기부에 대한 인식이 높아지고 있다. 본 연구는 재능기부에 참여하고 있는 미용전공자들을 중심으로 참여난관요인, 참여기간, 봉사대상, 참여분야, 참여방식, 참여동기 등의 특성을 분석하자 하였다. 설문응답은 701명의 미용재능기부자들을 대상으로 하였다. 참여난관으로는 능력 및 기술부족, 사회적 인식부족과 여유시간 부족 등으로 나타났다. 참여특성은 성별, 연령, 학력, 직업, 월소득 등에 따라 상이한 차이가 존재하였다. 이러한 연구결과를 토대로 미용재능기부를 위한 활성화 방안과 제언을 제시하였다.

• 한국실천공학교육학회논문지
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• 제2권1호
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• pp.126-134
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• 2010

공업계 고등학교의 금속재료 교과목 중에 재료시험법은 과학기술이 급격히 발전하는 것에 비해 교육수준이 시대에 뒤떨어지고 있다. 특히 기존의 파단면 해석방법보다 훨씬 진일보된 장비와 기술력으로 해석이 가능한 Fractography기법 도입의 필요성이 부각되고 있다. 이런 Fractography의 중요성과 해석방법을 중수로 압력관 재료를 이용하여 파단면의 특성을 정성적으로 해석을 통하여 입증하였다. 추후 공업계 고등학생들의 전문성을 늘이고, 자긍심을 함양하기 위해서 이런 최신 교과내용을 포함해야 할 것이다. 이런 교과내용을 현존하는 과학기술과 맞추는 작업은 주무행정기관에 의해 이루어지기 전에 일선 교사들의 자발적인 참여에 의해 수행될 필요성이 있다고 생각된다.

• Physical Therapy Rehabilitation Science
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• 제5권1호
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• pp.40-46
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• 2016

Objective: The purpose of this study was to examine the effect on multifidus and external oblique abdominis muscle activation during hip contraction of three types (concentric, isometric, eccentric) in standing position. Design: Cross-sectional study. Methods: Twenty healthy adult men volunteered to participate in this study. Muscle activation was recorded from gluteus maximus, both multifidus, and both external oblique abdominis by surface electromyography (EMG) while holding position in the type of gluteus maximus contraction. EMG values were normalized by maximum muscle contractions (% maximum voluntary isometric contraction). All subjects performed hip extension with three contraction methods. The type of gluteus maximus contraction using Thera-band was composed of concentric contraction (type 1), isometric contraction (type 2), and eccentric contraction (type 3). To measure muscle activation on the gluteus maximus contraction type, each position were maintained for 5 seconds with data collection taken place during middle three seconds. Muscle activation was measured in each position three times. Results: For the results of this study, there was no significant difference within three contraction patterns of the gluteus maximus (concentric, isometric, and eccentric) each both multifidus, both external oblique abdominis, and gluteus maximus. And there was no significant difference among both multifidus, both external oblique abdominis, and gluteus maximus each hip extension contraction type. Conclusions: These findings suggest that specific contraction types of the gluteus maximus does not lead to a more effective activation of the multifidus, external oblique abdominis, and gluteus maximus.

• The Journal of Korean Physical Therapy
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• 제30권1호
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• pp.1-7
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• 2018

Objective: This study aimed to determine the efficacy of flexible pole training combined with lumbar stabilization in improving trunk muscle activities and to investigate the difference according to posture in young adults. Methods: Twenty-five participants were enrolled in this study. The subjects were randomly allocated into either the flexible pole group or the rigid pole group. Participants performed lumbar stabilization exercises on quadruped and curl-up, with the flexible pole or rigid pole. Electromyography was used to assess the percent maximal voluntary isometric contracion (%MVIC) of the rectus abdominis (RA), external oblique (EO), internal oblique (IO), and erector spine (ES) muscles. All participants completed one 30-minute session per day, 3 days per week, for 6 weeks. The evaluation was performed before and 6 weeks after the training, and follow-up. The data were analyzed using independent t-test and two-way repeated measure analysis of variance to determine the statistical significance. Results: The flexible pole in curl-up showed significant differences in EO and IO muscle activities compared with the rigid pole. The flexible pole in quadruped showed significant differences in IO and ES muscle activities compared with the rigid pole. The RA, EO, IO, and ES muscle activities of both groups were significantly higher after 6 weeks training. Conclusion: The flexible pole in curl-up and quadruped showed an improvement in trunk muscle activation. The flexible pole combined with lumbar stabilization will be useful as an exercise tool to improve activity of trunk muscles.

• The Journal of Korean Physical Therapy
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• 제19권3호
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• pp.11-17
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• 2007

Purpose: The purpose of this study were to analyze fatigue patterns of the rectus femoris muscle by isometric contraction. Methods: Twenty healthy subjects(10 male, 10 female) participated in this study. Maximal voluntary isometric contraction(MVIC) was measured by the dynamometer. Muscle activity was recorded from the rectus femoris muscle. During the experiment, the subject was seated in the chair. The measured items, median frequency(MDF) and root mean square (RMS), were collected from the surface EMG. All data were analyzed using repeated measures ANOVA. Results: There was significant difference of MVIC between male and female. Endurance time was significant difference by the level of MVIC but no significant in the main effect(sex) and interaction effect. The MDF and fatigue index were significant differences in the interaction effect. The RMS was not significant difference in both of main and interaction effect. The muscle fatigue patterns of female was greater than male after 60% MVIC. Conclusion: This study showed that sex differences of muscle fatigue were started from 60% MVIC.