• 한국보건간호학회지
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• 제25권1호
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• pp.17-27
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• 2011

Purpose: The study examined the effect of exercise public health center exercise program on strength, balance, body composition and blood pressure in healthy elderly women. Method: Thirty healthy elderly women were divided into three 12-week exercise groups: Tai-Chi (n=10), silver dance (n=10), and band exercise (n=10). The results were analyzed by two-way repeated ANOVA and paired t-test using SPSS 12.0 program. Results: Body weight and body mass index were significantly decreased in the Tai-Chi and silver dance groups. In addition, there was a significant increase in balance time and reduced diastolic blood pressure in Tai-Chi participant. Grip strength was significantly increased in Tai-Chi and silver dance participants, but there was no effect in the band exercise group. Agility was significantly increased in the band exercise group. Conclusion: Tai-Chi and silver dance may be beneficial to improve fitness of elderly people, although the details remain to be elucidated.

• Structural Engineering and Mechanics
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• 제47권3호
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• pp.383-399
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• 2013

High-strength strands are widely used as a key structural element in cable-stayed bridges and prestressed concrete structures. Conventional strands for stay cable and tendons in prestressed concrete structures are ${\phi}$15.7mm coated seven-wire strands and ${\phi}15.2mm$ uncoated seven-wire strands, respectively, but the ultimate strengths of both strands are 1860MPa. The objective of this paper is to investigate the tensile behavior of a newly developed ${\phi}15.7mm$ 2,200 MPa coated strand and a ${\phi}15.2mm$ 2,400 MPa uncoated strand according to various types of mono anchorages and to propose appropriate anchorages for both strands. Finite element analyses were initially performed to find how the geometry of the anchor head affects the interaction among the anchor head, the wedge and the strand and to find how it affects the stress distributions in both parts. Tensile tests for the new strands were carried out with seven different types of mono anchorages. The test results were compared to each other and to the results obtained from the tensile tests with a grip condition. From the analysis and the test results, desirable mono anchorages for the new strands are suggested.

• 한국멀티미디어학회논문지
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• 제20권12호
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• pp.1980-1991
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• 2017

Many stroke patients undergoing rehabilitation therapy require a quantitative indicator for the evaluation of body function in paretic and non-paretic regions. In this study, the impedance parameters were acquired to assess the physical status in the upper extremity of thirty six stroke patients with hemiplegia caused by cerebral hemorrhage (10 patients) and cerebral infarction (26 patients), using bioelectrical impedance. Prediction marker (PM), phase angle (PA), PM/PA, and resistance (R) versus reactance ($X_c$) were utilized to evaluate the functional status of the paretic and non-paretic regions. In addition, the hand grip strength (HGS) and the pinch strength (lateral, palmer, tip) were measured on the upper extremity of hemiplegic stroke patients. PM was distributed in inversely proportional to HGS, but PA was distributed in proportional to HGS. However, there were a number of patients with HGS of 0, regardless of the impedance parameters (PM, PA, R vs. $X_c$). Paretic and non-paretic status in upper extremity of these patients could not be analyzed using impedance parameters. At the rehabilitation therapist's instructions, they were unable to move the hand and fingers of the paretic upper extremity by cranial nerve damage, motor nerve damage, and severe cognitive decline.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1998년도 춘계학술발표회 논문집
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• pp.163-185
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• 1998

The purpose of this study was to analyze the physiology changes by circuit weight training(CWT). The subject of this study consists of 16 student on ship(experimental groups(SE) N=8, control group(SCa) N=8) and 16 students on land (experimental groups(LE) n=8, control groups(LCb) N=8). The items of measurement were the changes of CWT time and heart rate per week, musclear functino and cardiopulmonary function. The conclusions are as follows : 1. Muscular fuction 1) Back strength in SE and LE group was increased significantly (p<.01, p<.05, 8.86% and 7.08%).Grip strength was increased slightly in 4 groups but there was no significance. 2) In push-ups, all 4 groups were increased significantly (p<.05, p<.01), sit-ups also were increased significantly in SE and LE group (p<.05, 6.71% and 9.62%). 3) In SE and LE group , standing long jump was in significantly (p<.01, p<.05, 4.49% and 6.09%), but only in LE group , side step was increased significantly (p<0.1, 5.84%). 2. Cardiopulmonary function 1) HRrest was decreased slightly in all 4 groups but was not significant changes. HRmax was increased only in LE group significantly (p<.05, 2.81%), treadmill running time was increased significantly in SE and LE group respectively (p<.01, p<.05, 10.78% and 11.07%). 2) VEmax was increased significantly in SE and LE group(p<.05, p<.01, 10.59% and 13.68%), but only in LE group Rfmax was increased significantly (p<.01, 4.83%). 3) In VO2max, LCb group was increased significantly (p<.05, 6.835), but SCa group was decreased significantly (p<.05, 4.32). VO2max/kg$.$min was increased significantly in LE and LCb group respectively (p<.01 p<.05. 4.75% and 3.98%).

• 한국강구조학회 논문집
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• 제11권2호통권39호
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• pp.109-116
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• 1999

본 논문은 관통형 고력볼트를 사용한 엔드플레이트형식 콘크리트 충전 각형 강관 기둥 H형강 보 접합부에 대한 단조가력하에서의 실험적 연구이다. 본 실험의 목적은 전회(前回)에서는 파악되지 않았던 엔드플레이트의 두께와 볼트의 배열에 대한 영향을 정확하게 평가하는데 있다. 실험의 주요변수는 엔드플레이트의 두께(12mm, 16mm)와 볼트의 배열 (EP1, EP2, EP3)이다. 변수에 따른 실험결과를 비교, 분석하였다. 1)실험체는 Bjorhovde와 EC3의 분류법에 의해 분류하였다. 2)T-stub모델에 근거한 접합부의 최대 모멘트 예측식에 의해 계산된 이론치$(_tM_u)$는 실험치$(_eM_u)$에 잘 대응하였다.

• 대한예방한의학회지
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• 제14권3호
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• pp.37-49
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• 2010

Objective : Qigong has been reported as an effective for post-mastectomy women. It consists of a series of postures combined with slow, smooth, graceful movements, and is considered a low intensity exercise. In this study, a specialist of Qigong developed a Qigong program for post-mastectomy women in a community. The object of this research is to evaluate the effect of Qigong on a subjective symptom scale, on the grade of discomfort and pain in everyday life, BMI, fat(%), muscular strength, shoulder joint movement, in post-mastectomy women. Methods : The study used a non-equivalent control group non-synchronized design. The experimental group received a Qigong 3 times a week for 12 weeks from September 7th to December 28th in 2009. The subjects were 40 patients are divided into 25 persons in experimental groups and 15 persons in contrastive group. The data were analyzed with descriptive statistics, chi-square test, t-test, Mann-Whitney U test. A P-value less than .05 was considered significant by 2-tailed test. All statistical analyses were performed with SPSS win(ver 12.0). Results : The results were as follows : The score in the subjective symptom(p=.040), and score of anxiety (p=.024), fat(%)(p=.007) were significantly decreased after Qigong program. The values for shoulder flexibility (left : p=.010, right : p=.008), and Muscular strength(grip power)(left : p=.021, right : p=.029) significantly increased after Qigong program. And Flexion(left ; p=.029), Extension(left : p=.001, right : p=.038), Adduction(left ; p=.001, right ; p<0.001) were also significantly increased after Qigong Conclusions : The Qigong is an effective health promotion program for post-mastectomy women.

• 한국컴퓨터정보학회논문지
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• 제26권12호
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• pp.179-185
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• 2021

민간경비는 경찰과 범죄예방이라는 공통된 업무 특성을 지니고 있으며, 우리 사회의 안전을 담당하고 있다. 하지만 민간경비의 채용과정은 경찰과 큰 차이를 보이고 있다. 따라서 본 연구에서는 경찰의 채용과정을 통하여 민간경비의 채용과정의 문제점을 파악하고 개선점을 제시하였다. 경찰의 채용과정을 비교하여 살펴본 결과, 민간경비의 채용은 교육훈련을 통하여 채용이 진행이 되며, 경비업무에 필요한 교육과정 및 체력 검증 등에 문제점이 조사되었다. 이러한 민간경비의 채용과정에서의 문제점을 개선하고자, 형법 및 범죄학의 교육과정, 100m 달리기와 좌우 악력 등의 체력검사 그리고 경비업무 실무 사례 등이 추가되어야 할 것이다. 본 연구를 통하여 우수한 경비원 채용과 더불어 민간경비 산업의 발전에 기초자료가 되었으면 한다.

• 한국응용과학기술학회지
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• 제38권6호
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• pp.1606-1615
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• 2021

본 연구에서는 남자 실업팀 핸드볼 선수들을 대상으로 플라이휠 운동을 적용한 웨이트 트레이닝 프로그램을 개발하여 상해예방과 경기력 향상을 위한 기초자료를 제공하는데 그 목적이 있다. 12주간 복합 플라이휠 운동 프로그램을 적용하여 신체조성, 체력요인, 무산소성파워, 등속성근기능에 미치는 영향을 분석한 결과는 다음과 같다. 팔굽혀펴기는 그룹 간 유의한 차이가 나타났다. 체지방률, 무산소성 파워는 시기별 상호작용에서 유의한 차이가 나타났다. 제자리멀리뛰기, 제자리높이뛰기, 악력, 배근력, 무산소성평균파워 그리고 등속성근기능검사는 좌굴근과 우굴근에서 시기별로 유의한 차이가 나타났다. 따라서 12주간 플라이휠 운동을 활용한 웨이트 트레이닝 결과는 상해예방과 경기력 향상을 위한 기초자료로 제공할 수 있을 것으로 판단된다.

• Journal of Ginseng Research
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• 제46권3호
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• pp.454-463
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• 2022

Background: Gintonin-enriched fraction (GEF), a non-saponin fraction of ginseng, is a novel glycolipoprotein rich in hydrophobic amino acids. GEF has recently been shown to regulate lipid metabolism and browning in adipocytes; however, the mechanisms underlying its effects on energy metabolism and whether it affects sarcopenic obesity are unclear. We aimed to evaluate the effects of GEF on skeletal muscle atrophy in high-fat diet (HFD)-induced obese mice. Methods: To examine the effect of GEF on sarcopenic obesity, 4-week-old male ICR mice were used. The mice were divided into four groups: chow diet (CD), HFD, HFD supplemented with 50 mg/kg/day GEF, or 150 mg/kg/day GEF for 6 weeks. We analyzed body mass gain and grip strength, histological staining, western blot analysis, and immunofluorescence to quantify changes in sarcopenic obesity-related factors. Results: GEF inhibited body mass gain while HFD-fed mice gained 22.7 ± 2.0 g, whereas GEF-treated mice gained 14.3 ± 1.2 g for GEF50 and 11.8 ± 1.6 g for GEF150 by downregulating adipogenesis and inducing lipolysis and browning in white adipose tissue (WAT). GEF also enhanced mitochondrial biogenesis threefold in skeletal muscle. Furthermore, GEF-treated skeletal muscle exhibited decreased expression of muscle-specific atrophic genes, and promoted myogenic differentiation and increased muscle mass and strength in a dose-dependent manner (p < 0.05). Conclusion: These findings indicate that GEF may have potential uses in preventing sarcopenic obesity by promoting energy expenditure and attenuating skeletal muscle atrophy.

• Journal of Ginseng Research
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• 제45권6호
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• pp.744-753
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• 2021

Background: Gintonin-enriched fraction (GEF) is a new non-saponin component glycolipoprotein isolated from ginseng root. This study examined the effect of GEF on age-related sarcopenia in old C57BL/6J mice. Methods: Young (3-6 months) and old (20-24 months) C57BL/6J mice received oral GEF (50 mg/kg/day or 150 mg/kg/day) daily for 5 weeks. During the oral administration period, body weight and grip strength were measured weekly. After sacrifice, muscles from the hindlimb were excised and used for hematoxylin and eosin staining and western blotting to determine the effects of GEF on sarcopenia. The thymus was photographed to compare size, and flow cytometry was performed to examine the effect of GEF on immune homeostasis in the thymus and spleen. Blood samples were collected, and the concentrations of pro-inflammatory cytokines and IGF-1 were measured. Results: GEF caused a significant increase in muscle strength, mass, and fiber size in old mice. GEF restored age-related disruption of immune homeostasis by maintaining T cell compartments and regulating inflammatory biomarkers. Thus, GEF reduced common low-grade chronic inflammatory parameters, which are the main cause of muscle loss. Conclusion: GEF maintained immune homeostasis and inhibited markers of chronic inflammation, resulting in anti-sarcopenia effects in aged C57BL/6J mice. Thus, GEF is a potential therapeutic agent that slows sarcopenia in the elderly.