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- 저자 : 김형근 ( Hyung Geun Kim ) (검색결과 132 건)
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김형근,김명한,조남규,김상섭,김상대,Kim, Hyung Geun,Kim, Myeong Han,Cho, Nam Gyu,Kim, Sang Seup,Kim, Sang Dae 한국강구조학회 2009 韓國鋼構造學會 論文集 Vol.21 No.5
이 연구에서는 y형강판과 L형강으로 기둥의 외부를 구성하고 내부에 콘크리트를 타설하여 완성하는 yLRC (Reinforced Concrete with y-shape steel sheets and L-shape steel angles) 합성기둥에 대한 기초적인 실험을 수행하였다. yLRC 합성기둥은 철골과 콘크리트의 합성작용으로 단면성능이 우수하고, 거푸집 공사와 배근 공사를 생략할 수 있으므로 공기단축과 시공성 향상에도 상당한 효과를 나타낼 것으로 예상된다. L형강의 폭-두께비가 압축강도에 미치는 영향을 분석하기 위해서 L형강의 폭-두께비를 실험변수로 하는 6개의 실험체 (축소실험체 3개 및 실대실험체 3개)를 제작하고, 이 실험체에 대하여 중심축하중 실험을 수행하였다. 실험결과를 바탕으로 yLRC 합성기둥의 압축거동 및 압축강도에 대한 역학적인 특성을 분석하였다. An experimental study was performed on the yLRC composite column. Its external surface was manufactured with y-shape steel sheets and L-shape steel angles, and concrete was poured inside in the field. This composite column has improved the section capacity due to the composite action of steel and concrete, and provides good efficiency in reducing the terms of construction works because of its abridged formworks. The stub column specimens (three small and three large specimens) were tested through concentrical axial loading, and the effect of the width-to-thickness ratio of the steel angle on the column axial strength was examined. The axial strength and behavior of the composite columns were analyzed, and a formula for predicting the axial load capacity was proposed.
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김형근,황환규,Kim Hyung-Geun,Whang Whan-Kyu 한국정보처리학회 2005 정보처리학회논문지D Vol.12 No.6
순차 패턴 탐사에 대한 연구는 대용량의 데이터베이스에서 사용자에 의해 주어지는 최소 지지도를 만족하는 빈발 시퀀스를 찾는 문제를 다룬다. 하지만 현재까지 이루어진 순차 패턴 탐사 방법은 빈발 시퀀스들의 길이가 길어지거나 최소 지지도가 상대적으로 낮게 주어진 상황에서는 생성되는 시퀀스가 기하급수적으로 많아져서 성능이 급격히 저하되는 문제점을 가지고 있다. 본 논문에서는 이 문제를 해결하기 위해서 모든 빈발 시퀀스의 정보를 포함하며 그 수가 현저히 적은 닫힌 빈발 시퀀스를 찾는 방법을 제안한다. 제안하는 알고리즘은 효율적으로 가지치기를 수행하기 위해서 깊이우선 탐색 방법으로 후보 시퀀스를 생성하고 데이터베이스를 비트맵으로 표현하여 비트 연산으로 지지도를 효율적으로 계산한다. 또한, 비트맵으로 표현된 시퀀스 특성을 이용하여 가지치기할 시퀀스를 적은 연산 비용으로 찾을 수 있다. 이런 장점을 통하여 제안한 방법이 지금까지 제안된 알고리즘보다 훨씬 빨리 닫힌 빈발 시퀀스를 찾는 것을 성능 실험을 통하여 확인하였다. Sequential pattern mining finds all of the frequent sequences satisfying a minimum support threshold in a large database. However, when mining long frequent sequences, or when using very low support thresholds, the performance of currently reported algorithms often degrades dramatically. In this paper, we propose a novel sequential pattern algorithm using only closed frequent sequences which are small subset of very large frequent sequences. Our algorithm generates the candidate sequences by depth-first search strategy in order to effectively prune. using bitmap representation of underlying databases, we can effectively calculate supports in terms of bit operations and prune sequences in much less time. Performance study shows that our algorithm outperforms the previous algorithms.
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만성뇌졸중 환자의 발목에 적용한 테이핑 장력이 보행에 미치는 영향
김형근(Kim Hyung-Geun),이제혁(Lee Je-Hyeok),김성호(Kim Seong-Ho) 대한치료과학회 2021 대한치료과학회지 Vol.13 No.2
Objective: The purpose of this study is to investigate the effect of taping of different tension on the walking ability of stroke patients by applying them for 5 weeks to chronic stroke patients. Method: The subjects of this study were randomly divided into elastic taping group and non-elastic taping group. The duration of the experiment was a total of 5 weeks. During the experiment period, both groups lived with the taping attached, and both the elastic taping group and the inelastic taping group were equally applied to the area where the taping was attached. The attachment sites were peroneus tertius, peroneus longus, extensor disitorum longus, and tibialis anterior muscles, and they were attached along the running direction of the muscle. After attaching the taping, pre-measurement of walking ability was performed, and post-measurement was performed 5 weeks later. Results: As a result of comparing the amount of change before and after the experiment on walking ability between the elastic taping group and the inelastic taping group, the inelastic taping group showed significant improvement over the elastic taping group in stance phase time, step time, and cadence (p<0.5). Conclusion: The group to which inelastic taping was applied to the ankle of chronic stroke patients showed significant improvement in stance phase time, step time, and cadence compared to the group to which elastic taping was applied. Therefore, in this study, the application of inelastic taping to the ankle joint in the rehabilitation of chronic stroke patients can be of great help in improving walking ability.
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김형근(Hyung-Geun Kim),김용훈(Yong-Hoon Kim) 대한치료과학회 2022 대한치료과학회지 Vol.14 No.1
Objective: This study is a comparative study conducted retrospectively to investigate the effect of an exoskeleton-controlled gait-assisting robot gait machine on the improvement of balance and gait ability in subacute stroke patients. Method: 128 patients who were hospitalized in Seoul-based Hospital A from January 2020 to December 2020 agreed to participate in the study and use personal information. Patients with a factor of less than 6 months of onset and berg balance scale (BBS) score of greater than or equal to severity (21 points or more) were measured balance and gait analysis test. In the patients, 30 patients in the general physical therapy group and 30 patients in the general physical therapy with the additional exoskeleton-controlled gait-assisting robot gait training group were selected and their balance and gait abilities were retrospectively compared and analyzed. Results: The RAGTG significantly improved compared to the CG in the A-P position and lateral sysmmetry evaluation in the balance ability, and in the cadence and stride length evaluation in the gait ability. Conclusion: Both groups showed statistically significant improvement in balance and gait and in particular, the group that received additional RAGTG improved more in A-P position, lateral symmetry, and cadence, stride length compared to the CG. This result had a positive effect on balance ability and gait ability.
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김형근 ( Hyung Geun Kim ),최준환 ( Joon Hwan Choi ) 경남대학교 인문과학연구소 2016 人文論叢 Vol.40 No.-
중국의 부상은 우리에게 중요한 도전이자 기회로 작용할 수 있다는 점에서 중국 항만 물동량 증가에 영향을 미치는 요인을 분석해보고 향후 성장 가능성 및 우리 의 대응방안 도출을 위한 기초연구를 수행하였다. 연구결과는 다음과 같다. 첫째, 항만 물동량 증가에 항만 부두의 길이와 선석의 수는 정(+)의 관계를 보일 것으로 기대했으나 물동량에 별다른 변화를 보이지 않았다. 둘째, 항만의 물동량은 인구, 평균소득, 해당지역의 재정수입과 정(+)의 관계를 보이며 중요한 영향요인으로 작 용할 것이라는 가설은 실증분석으로 통해 유의함을 알 수 있었다. 셋째, 산업별 비 중에 따른 물동량의 증가는 부분적으로 유의한 것으로 나타났다. 특히 칭다오항의 경우는 5%내에서 유의수준을 나타내며 중요한 영향요인으로 꼽을 수 있었다. Floating of China is an important issue for us, in that it can act as an opportunity, the possibility of future try to analyze the factors affecting the increase in the Chinese port logistics quantity growth and we went our basic research for the corresponding measures derived. First, harbor pier to the increase of the port cargo handling volume, positive(+), but was expected to show a relationship, did not show a special change in the cargo handling volume. Second, the cargo handling volume is population, average income, the hypothesis that acts as an important influence factor to show the relationship between the fiscal revenue of the region and the positive(+) is a significant use in empirical analysis it was possible to know that. Third, the increase in cargo handling volume corresponding to the industry percentage was found to be partially significant. Especially in the case of Qingdao Port, shows the significance level in a 5% could be mentioned as an important factor.
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