지점부 다이아프램의 응력분배 거동

김동표,정경섭,김경남,양경환 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

These days, bridges have a tendency to be long-spanned and simple ‘ thus, the importance of economy and efficiency has increased for bridge construction. As a result, one of the main members on which interest is focused is the diaphragms. In this study, stress variation of the support diaphragms in a steel box girder was considered. This paper deals with the behavior of the stress distribution on the diaphragms on the bearings of a closed section steel box girder bridge due to the continuous casting of concrete slab. Both experimental and structural analyses were performed to verify the behavior of the stress distribution a composite steel box girder bridge under construction. Strain was continuously checked at intervals of 10 to 30 min. from the beginning of the placement by the Time Interval Function of the measuring instrument. The variation of strain on the diaphragms on the bearings are presented herein.

이종마찰압접재 계면의 기계·금속조직학적 거동 및 파면특성 : STS304와 SM15C재를 중심으로 For STS304 and SM15C

오환섭,박경식,박준건,오정국,백영남 慶熙大學校 材料科學技術硏究所 1998 材料科學技術硏究論集 Vol.11 No.-

In this study is behavior of crack propagation and fracture under static tensile load, shear load, rotary bending fatigue load in friction welded dissimilar materials. Crack was observed in fine ferrite zone of SM15C and heat affected zone of STS304. Plastic flow was occured by friction welding process, so direction of crack is inclined with welded surface. Fatigue fracture most occurred in SM15C heat affected zone around interface. Fibrous zone with the view of macroscope and dimple pattern with the view of microscope were observed at fracture surface. Result is more metal micrstructure dependence than stress dependence by mechanical and metallic mechanics.

축구코치의 리더쉽 유형과 선호도

이경섭,박장평 강원대학교 체육과학연구소 2000 江原大學校附設體育科學硏究所論文集 Vol.- No.23

The Leadership Preferences and Styles of Soccer coaches The aim of this study is to analyze the leadership preferences and styles of soccer coaches and to offer coaches the efficient leadership style for the various sports situations. The subjects are 399 superior athletes-who are in teams that played in semifinals in the nationwide tournaments -, 391 inferior athletes, and according to the school grades, 311 middle school students, 330 high school ones and 149 college ones. The leadership styles are investigated by Leadership Style for Sport. Following are the results of this study: 1.In the leadership styles, the soccer coaches of inferior teams tend to have Training and Instruction style and Authoritative style of leadership, complied to those of superior teams. 2.In the case of school grades, the coaches in high schools and colleges take Training and Instruction style, Democratic behavior, Social support, and Positive feedback style of leadership, compared to those in middle schools. 3.The student players in superior teams prefer Training and Instruction style as the style of cheir coach more than those in inferior teams. 4.In order of college, high school, and middle school, the student players prefer Training and Instruction style, Social Instruction style, and Authoritative style of leadership.

Diazepam과 Lidocaine이 노인환자의 기관내삽관시 심전도 및 심맥관계에 미치는 영향

김경희,권성범,신용섭,최세진 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.1

We selected at random 30 geriatric patients who had received operation under the general anesthesia with endotracheal intubation. The patients were divided into 3 groups. Group 1 (control) had received endotracheal intubation without diazepam and lidocaine. Group 2 had received endotracheal intubation with diazepam. Group 3 had received endotracheal intubation with lidocaine. The changes of arterial blood pressure and pulse rate, and the appearance of arrhythmia were compared in each group. The results were as follows : 1. The increase of blood pressure and heart rate were less in group 2, 3 than the control group which showed significant increase of blood pressure and heart rate with endotracheal intubation. 2. The incidence of arrhythmias with endotracheal intubation was less in group 2(20%), group 3(50%) than the control group(80%). 3. The electrocardiographic change in the group 2 and 3 were not significant compared to group 1(control).

직무체험이 고등부 정신지체 학생의 직업흥미에 미치는 영향 : 자동차 · 건물관리 · 식당서비스 · 가사 영역을 중심으로 Centering around Automative · Building Trades · Food Service · Housekeeping interest areas

임경원,박은영,김삼섭 국립특수교육원 2005 특수교육연구 Vol.12 No.1

이 연구의 목적은 직무체험이 고등부 정신지체 학생의 직업흥미에 어떤 영향을 미치는지, 그리고 직업흥미 영역별 변화 순위는 어떠한지를 알아보는데 있다. 이를 위해 대전 · 충청 · 강원 지역 고등부 정신지체 학생 57명을 실험집단으로 선정하였고, 3박 4일 동안 기숙생활을 하면서 대전직업능력개발센터에서 개발한 직무체험프로그램(2004년)을 실시하였다. 직무체험 프로그램은 자동차, 건물관리, 식당서비스, 가사의 4가지 직업영역으로 구성되었으며, 직무체험의 영향을 알아보기 위하여 직무체험 프로그램의 실시 전과 후에 직업흥미 검사를 실시하여 그 결과를 비교하였다. 연구에서 사용된 설계는 이질집단 전후검사 설계이며, 자료처리는 만 휘트니 U 검정과 프리드만 검정을 이용하였다. 이 연구의 결과는 다음과 같다: 첫째, 직무체험이 고등부 정신지체 학생의 직업흥미에 미치는 영향을 알아본 결과, 자동차와 가사 영역은 유의한 차이가 있는 것으로 나타났다(p<.05). 건물관리와 식당서비스 영역에서는 유의한 차이가 나타나지 않았다; 둘째, 직업흥미 영역별 변화 순위는 자동차, 가사, 식당서비스, 건물관리의 순서로 나타났다. 순위의 실제적 양상을 알아보기 위해 사후검정을 실시한 결과, 자동차 흥미 영역은 건물관리와 식당서비스와 유의한 차이를 보였고(p<.05), 가사 흥미 영역은 건물관리와 식당서비스와 유의한 차이를 보였으며(p<.05), 자동차와 가사, 건물관리와 식당서비스는 유의한 차이를 보이지 않았다. 즉, 첫 번째 순위는 자동차와 가사, 두 번째 순위는 식당서비스와 건물관리 영역임을 알 수 있었다. 이 연구결과에 비추어 볼 때, 정신지체 학생들의 직업흥미 영역을 확대시키고 변화를 유도할 수 있는 교육활동의 일환으로 다양한 직무체험 프로그램을 활용할 수 있을 것으로 생각된다. The purpose of this study was to examine the effect of job experience on vocational interest and the changed order of vocational interest areas of high school students with mental retardation after application of job experience program. The subjects of experimental group were 57 students with mental retardation and selected from high school in Daejeon · Chungcheong · Gangwon provision. They lived in dormitory during a four-day and involved in job experience program which was developed by Daejeon Vocational Competency Development Center for the Disabled (2004). Job experience program consisted of four vocation areas of Automative, Building Trades, Food Service and Housekeeping, and pre- and post-vocational interest inventory was conducted and analysed to compare the effect of job experience. This study employed nonequivalent control group pretest and posttest design and Mann-Whitney U test and Friedman test were used for data analysis. The results as follows: First, the effect of job experience on vocational interest had significant differences in Automative and Housekeeping areas(p<.05), but was not significantly different in Building Trades and Food Service areas; Second, the changed order of vocational interest areas showed Automative, Housekeeping, Food Service and Building Trades in turn. The results of the post hoc test, Automative was significantly different with Building Trade and Food Service, and Housekeeping was significantly different with Building Trade and Food Service(p<.05). Automative had not significant difference with Housekeeping, and Building Trade was not significantly different with Food Services. The results of this study showed that job experience program as the kind of educational activity was used to enlarged and changed in vocational interest areas of high school students with mental retardation.

구조적 손상을 입은 철근콘크리트 보의 보강 효과에 관한 연구

김정섭,신용석,김경옥 朝鮮大學校 建設技術硏究所 2006 建設技術硏究 Vol.26 No.1

This study conducted bending experiment to examine reinforcing effects after preloading of reinforced concrete by reinforcing materials and obtained the following conclusions. To sum up experimental results, it was found that CFS reinforced specimens were excellent in improving bending force and ductility capacity and CB reinforced specimen showed higher reinforcing effects. GFS reinforced specimen had lower reinforcing effects due to lower attachment than fiber reinforced material CFS. GSP reinforced specimen had larger internal force than other reinforced specimens, but it showed the lowest reinforce effects due to its low attachment to concrete and GSP reinforcing specimen showed the same or higher reinforcing effects than other reinforcing materials if its attachment to concrete is improved.

다이아프램 맨홀현상에 따른 응력 분배 거동

김경남,정경섭,권소진,우상익 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.1

Using of steel box girder bridges have been used a tendency to increase for workability and economic reasons. For maintenance and management of these bridges, manholes are needed for route. (But installation of manholes causes a loss of area of section. It is developed with stiffness down and stress concentration.) By way of prevention, it is reinforced with attachments and stiffeners or its shape strengthened by as aspect in geometry. Sometimes it is over-estimated and excessive reinforcing at a welding cost follows. In this paper, both experimental and analytical results are performed to verify the behavior of a steel box girder bridge under increasing dead loads. Furthermore, there is some structural analysis on several manhole types of diaphragm, which reflect the real effect of the support. The presentation in this paper is ultimately the most reasonable and economical reinforcing method for the manhole of a diaphragm is a steel box girder bridge.

가변블록과 복잡도 측정에 의한 역전파 신경회로망의 영상압축(Ⅱ)

김경민,최남섭 여수대학교 1998 論文集 Vol.12 No.2

In this paper, we propose the image compression technique using a neural network with backpropagation algorithm. The image compression technique using a neural network is advanced technique for data compression which represents data blocks by an efficiently chosed of codewords. The neural network has three layers: one input layer, one hidden layer and one out layer. The inputs of the neural network are original image data, while the outputs are reconstructed image data which are close to inputs. This paper present the variable block size method considering image complexity. This method determines a block size for the block image by PSNR test, and dynamically assigns compression data according to the distribution of their image activity or complexity. In comparison with variable block size method, this method improves compression ration with a little loss of PSNR.

7세기 新羅의 財政運用

李京燮 한국고대사학회 2004 韓國古代史硏究 Vol.34 No.-

After the allied forces of Silla(新羅) and Tang(唐) Empire attacked and overthrew Baekjae(百濟) in A.D. 660, Silla was confronted with the lack of the national treasury, which was caused by the unification war against Baekjae and Goguroy(高句麗), and needed to much of its expenditure for the military spending. For the supply of line; the battle against the Baekjae Remnant, military supplies in Ungjin - Dodocbu(熊津都督府), and that in Tang's military expedition to Goguroy, Silla was forced to spend excessive war expenditures. In order to try to find a way out of the financial difficulties, Silla had got to reach the direct control of the old torritory of Baekjae to find new sources of finance. In this process, in spite of Tang's intervention, in late A.D. 665, Silla established Ballaju(發羅州) in the south of Baekjae, and ensured the new source of finance. The source of people and cultivated land in Old Baelgae enabled Silla to increase revenue. At the same time, through the financial policies Silla comforted and rewarded its own people and Baekjae people who had suffered from the war. In other words, that was a tax cutting policy. In order to succeed the unification war(統一戰爭), after all, one of the indispensable factors was the war supporting financial system. And so, in Silla, its appropriate bureaucracy system was Jipsabu(執事部) and its competent secretary was called Jungsi(中侍). Jungsi who had taken charge of affairs of State succeeded to the tradition of Pumzu(稟主) which had administered the national treasury, and finally managed the wholly wartime finance. Until now, most studies have emphasized that because Jipsabu and Changbu were differentiated from Pumzu in A.D. 651, the politics of Silla was entirely separated from the finance. But this study indicate that Jungsi played a leading role of the unified arbitrator in the finance running, which Pumzu had done at former periods. The political role of Jungsi of Jipsabu placed a great emphasis on the unification war in the 7th century. I think that it was after the unification war of middle age(中代) of Silla that the political role of Jungsi was emphasized.

심혈관계 질환으로 관상질환 집중치료실에 입원한 환자들의 혜후 측정을 위한 APACHEⅢ점수 체계의 임상적 유용성

이공섭,이창선,최현주,홍종서,강지향,김도형,이민영,오인균,김병엽,김상억,김학찬,한승혜,이재용,지영우,안경주 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8