yLRC 합성기둥의 압축강도에 관한 실험 연구

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.

비트맵을 사용한 닫힌 빈발 시퀀스 마이닝

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.

동해안 오구굿의 구조 연구

김형근(Kim Hyung-Geun) 한국무속학회 2006 한국무속학 Vol.0 No.12

본고는 한국의 망자천도굿 중의 하나인 동해안 지역의 오구굿 구조에 대한 연구이다. 여기서 말하는 구조는 두 가지 차원에서 진행된다. 한판의 굿 전체를 제의구조라고 했고, 그 굿 안에 작은 제차들, 소위 말하는 거리들의 구조를 가리켜 연행구조라고 했다. 먼저 연행구조를 살피기 위하여 각각의 제차들이 어떻게 연행되는지 살펴보았고, 그것의 구조화를 시도해보았다. 구조화를 통해 동해안 오구굿에는 네 가지 성격으로 개별 제차들을 구분해 볼 수 있었다. 이것은 굿에서 행하는 기능과도 직결되어 규범기능, 청배기능, 축원기능, 천도기능을 하고 있다. 구조가 정형화된 개별 제차보다는 구조화되지 않은 축원과 상징적인 행위가 중요시되는 개별 제차가 더욱더 많음을 확인할 수 있었다. 개별 제차의 구조를 ‘청신-오신-송신’으로 보려는 기존의 시각이 부적절함을 아울러 거론하였다. 제의구조는 〈준비〉-〈각신청배〉-〈천도〉의 단계로 진행된다고 했다. 청신-오신-송신이라는 개념으로 파악할 수 없음을 또한 아울러 밝혔다. The purpose of this paper is to clarify shamanistic ritual characteristics of the East Coast Ogugut. In Korea, shamanistic rituals are held nationwide in a sense to send the deceased to a good place and the names and characteristics are different in each region. In the east coast of Korea, people call the ceremony, “Ogugut.” The aspect of these rituals is described in detail focusing on songs and dances. Before analyzing the structure of the rituals, the researcher looked into the aspects of each performance factor that constructs individual rituals and performancephases. Looking into the performancestructure of each individual ritual, Ogugut can be divided by Gut (Shamanic ceremony) and general ceremony. The east coast Ogugut’s general rituals consist of 〈calling spirit〉, 〈meeting spirit〉, and 〈driving away evil spirit〉. The east coast Ogugut is a ceremony that leads the deceased to heaven and each ritual exists and functions to actualize the purpose. These rituals form groups of the ceremony by binding the ones with the similar meanings into one group. For example, 〈preparation〉, 〈inviting individual spirits〉, and 〈leading the deceased to heaven〉 are those groups. This is a different result from the perspective of the existing studies that considered each groups to be 〈calling spirits〉, 〈amusing the spirits〉, and 〈send the spirits away〉. The biggest difference here is that the existing studies indicate that the ceremony invitesall the spirits at the beginning of the ceremony while the recent result of this study indicates that each spirit is invited individually each time. This study contributed to the studies on the east coast Ogugut that were somewhat lack in research. It conducted intensive field-work that enabled detailed documentation and analyses on the actual field experience.

동북아 물류시대 중국 물류시장 진출 타당성에 관한 연구

김형근 ( Hyung Geun Kim ) 아시아문화학술원 2016 인문사회 21 Vol.7 No.3

본 연구는 중국투입산출표의 기본구조 및 레온티에프 모형을 고찰하고2012년 중국 산업연관표에 제시된 1차 자료에서 중국 물류산업이 전체 산업 중에서 감응도계수와 영향력계수 측면에서 얼마만큼의 비중 변화를 보이고 있는지 분석하였다. 또한 중국의 2007년과 2012년 산업연관표를 활용하여 물류산업 자체의 전·후방 연관산업을 비교분석하여 중국물류산업이 향후 중국경제에 어떻게 영향을 미칠지 가늠해 보고자 한다. 연구분석 방법으로는 레온티에프(Wassilly Leontief)가 고안하여 사용된 영향력계수와 감응도 계수를 이용하여 분석하였다 This Article, we first previous studies of the logistics industry in China and look at the status of, all forms of research and the basic structure of industries with high correlation analyzed Leontief method, and then China in 2012 from the primary data presented in industries with Chinese logistics industry as a whole industry sensitivity of coefficients and in terms of influence coefficients that account for how much weight are investigated. Finally, China``s 2007 and 2012 using industries with concrete before the logistics industry itself. Backward linkage industries in the future by comparing the Chinese logistics industry, how in the Chinese economy, will affect what will be analyzed. Its research tools used to analyze Leontief model(Wassily Leontief) designed and used in the China factor and the influence of I-O tables using sensitivity analysis is to count

재난 · 재해 극복을 위한 모듈러 임시주거(보호)시설 확보

김형근(Kim, Hyung-Geun),김진성(Kim, Jin-Sung) 대한건축학회 2020 建築 Vol.64 No.6

중국의 권역별 소비시장에 관한 연구

김형근 ( Hyung Geun Kim ) 아시아문화학술원 2015 인문사회 21 Vol.6 No.4

글로벌 금융위기 이후 중국이 내수 중심의 경제성장 패러다임으로 전환을 가속화하면서 중국 소비시장이 갈수록 확대되어 가고 있는 가운데, 신흥도시의 소비시장이 활기를 띠고 있다. 이에 과거 주로 베이징, 상하이 등의 1선 대도시를 시장거점으로 하던 외자기업들도 경쟁적으로 신흥도시로 진출하고 있으나, 우리기업들의 중국 내수 소비시장 진출은 여전히 1선 대도시를 중심으로 하는 연해지역에 집중되어 있는 실정이다. 또한 현지 시장에 대한 정보의 부족, 유통망의 결핍, 브랜드 경쟁력의 저하 등으로 인해내수 소비시장개척에 어려움을 겪고 있다. 이에 본 연구는 중국 신흥도시의 소비시장 특성에 대한 분석을 통해 우리기업의 중국신흥도시 진출 전략을 제시하였다. As China is undergoing a rapid shift in paradigm of its economic growth from an export-driven one to one focused on domestic consumption in the wake of the global financial crisis, the consumer market in China is expanding gradually, especially in the new emerging cities. Foreign companies, which had mostly based their marketing centers in first-tier mega cities such as Beijing and Shanghai, are now competing to enter those new emerging cities. Despite such developments, however, South Korean companies are still tied to the coastal area, where most of the first-tier cities are located, with respect to their entry into the domestic consumer market in China. And the insufficient information available about the local market, combined with the lack of distribution channels and deteriorating brand competence, is hindering their efforts to develop their own domestic consumption market. Therefore this study is aimed at analyzing the characteristics of the consumer market in the new emerging cities in China and coming up with recommendations with regard to strategies for entering in China.

중국 로보틱 항만 현황과 우리나라 자동화 항만 구축 필요성 연구

김형근(Kim Hyung Geun) 대한중국학회 2018 중국학 Vol.64 No.-

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.

호흡기 증상 없이 발생한 뇌 지방색전증 1례

김형근 ( Hyung Geun Kim ),이경미 ( Kyung Mi Lee ),김지혜 ( Ji Hye Kim ),김준식 ( Jun Sig Kim ),한승백 ( Seung Baik Han ) 대한외상학회 2005 大韓外傷學會誌 Vol.18 No.2

Fat embolism syndrome is a collection of respiratory, neurological and cutaneous symptoms and signs associated with trauma and other disparate surgical and medical conditions. The incidence of clinical syndrome is low while the embolization of marrow fat appears to be an almost inevitable consequence of long bone fractures. The pathogenesis is a subject of conjecture and controversy. There are two theories which have gained acceptance(mechanical theory, biochemical theory). Onset of symptom is usually within 12 to 72 hours, but may manifest as early as 6 hours to as late as 10 days. The classic triad of fat embolism syndrome involves pulmonary changes, cerebral dysfunction and petechial rash. The cornerstone of treatment is preventing the stress response, hypovolemia and hypoxia and operative stabilization of fractures. Corticosteroid are the only drugs which have repeatedly shown a positive effect on the prevention and treatment of fat embolism syndrome. We report a case of post-traumatic fat embolism syndrome with severe cerebral involvement without respiratory distress. A 55 years old female had a traffic accident. She sustained pelvic bone fracture and both humerus fracture. Approximately 4 hours after the accident, mental status change developed without a focal neurologic deficits. She had no respiratory symptom and sign. Her brain MRI showed multiple cerebral fat embolism lesion. The patients received supportive treatment with corticosteroid, albumin. Her neurologic status stabilized over several days. After orthopedic surgery, she was discharged 62 days after admission.

뇌졸중 환자의 정적기립 시 가속도계를 이용한 균형평가의 유용성

김형근(Kim Hyung-Geun),유영열(You Young-Youl) 대한치료과학회 2016 대한치료과학회지 Vol.8 No.1

Objective: The purpose of this study is to suggest the usefulness of accelerometer on postural sway in stroke patients Method: We conducted experiments in which 27 stroke patients stand on on firm surface with opening eyes, and on balance pad with closing eyes by tri-axial accelerometers. We used t-test to compare the differences of two posture during static standing and also the differences between falling and non-falling. Results: There were significant differences according to static standing on firm surface with opening eyes, and on balance pad with closing eyes(p<.05). Also, there were significant differences in static standing on balance pad with closing eyes between falling and nonfalling (p<.05). Conclusion: The results of this study showed Accelerometers have been proposed as a quantitative measure of balance during static standing