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Catenary 곡면을 갖는 막구조물의 치환기법에 관한 연구
임채욱,송평훈,김승덕,송호산 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
Membrane structure systems and cable net structure systems are attracting people's attention as they are used in many buildings because of their light materials and airy appearances. If a membrane structure system or a cable net structure system does not have sufficiently high initial stiffness, it may be in unstable state. But if the initial stiffness is secured, the system will be in stable state. In this study the nonlinear finite element formulae for membrane and cable members considering geometric nonlinearity is derived, and then a catenary's membrane structure, and a tension membrane structure by Nass(Nonlinear Analysis for Spatial Structures) program is analyzed. The suitable scheme, which membrane structure are assigned by cable elements for overcoming the unfitted shape problem, is shown that the section of cable is assigned by element's area.
임성철,박상기,도남용,박상학,이승일,송창훈,박종 朝鮮大學校 附設 醫學硏究所 1998 The Medical Journal of Chosun University Vol.23 No.1
There are many advantages and disadvantages under the limited bachelor's admission system. To diminish the demerits and to increase the merits of this system, the authors posed questions to the faculties and students of the Department of Medicine. Chosun University College of Medicine and other colleges in Korea. The questionnaire was made according to trends and feelings in this system. We received a lot of information and suggestions as to how to improve the system, in the following paper we discuss and report the prospective aspects of the bachelor's admission system.
임정일,임완기,이승훈 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1
The purpose of this study was to clarify the relationship between biomechanical and physiological factors, and running ability in middle-distance runners. VO₂max test, Maximal anaerobic running test(MAST) and 600m running test were conducted on two middle-distance runners. Main results were as follows: 1) Each subjects improved middle-distance running performance based on improvement of anaerobic capacity. 2) Running peformance in Subject A was influenced by last 200m's running velocity. And last 200m's running velocity was associated with mean power and hip extension muscles power at the first half of support phase. 3) These was a movement instability at first 200m. And it limits the middle-distance running performance in Subject B. These results suggested that is important for Subject A to improve his anaerobic capacity and the hip extension strength in competition period, for Subject B to acquire movement stability.
최동훈,이중림,민승기,박종환,김해영,조재선 慶熙大學校 1998 論文集 Vol.27 No.-
Strain type of lactic acid bacteria was analysed by PCR and SDS-PAGE. PCR allows the rapid and specific detection of lactic acid bacteria using primers based on 16S rRNA gene-sequences. The analysis of protein pattern on SDS-PAGE can be used to determine the differences among the same or similar species of lactic acid bacteria. Therefore, the complementary use of PCR and SDS-PAGE method is one of simple way to classify the lactic acid bacteria and to compare with genetic analysis.
이승훈,이신언,임정일 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2
This study have focuses on 21 cases of spine-neck broken at S hospital in seoul. Breaking spine-bone neck have occurred frequently at young ages. There are 6 cases of smashed fracture, 8 cases of both-side joint dislocation, 2 cases of one-side joint dislocation. And there are eight cases of entire broken, three cases of intermediate broken, 1 case of brown-sequard, three cases of middle part broken, 6 cases of knot broken. There are 0 or 2 cases occurred annually, and it doesn't mean sudden decreasing of fractures. Most of cases are able to prevent, but the wounds didn't take any preventive actions. If preventive curing methods are make, it will decrease effectively. We must make several preventive plans to reduce fatal spine-neck fracture.
임태호,임훈,이종호,강형구,장문준,조광현,장석준,김승호,정상원 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4
Background: This study was designed to analyze the current emergency department(ED) medical records of teaching hospitals in Korea. Methods: The five-item questionnaires were mailed to the EDs of 40 hospitals. Among them, 27 questionnaires and 35 ED medical records were returned for reply rates of 67.5% and 87.5%, respectively. Results: 1) The actual number of data elements in the ED medical records used by each hospital varies widely. It ranges from 1 to 15 data elements with an average of 7.5 data elements. 2) Thirteen data elements, signature of nurse, checklist style in review of systems, checklist style in physical examination, neurologic examination, figure of face, Glasgow coma scale, trauma scale, treatment plan, mode of transfer, condition on transfer, documents sent with patient, condition on discharge or discharge instruction, use of pediatric chart and vaccination history are used by less than 50% of the medical records examined. 3) There was no difference in the total number of data elements or in redesign and computerization of ED medical record based on the location of the hospital, the type of hospital administration, or the number of years since the start of EM residency program. 4) There was a statistically increased number of data elements in redesigned medical records. 5) In the survey, 89% of the residents replied that medical records needed to be redesigned. With respect to uniformity, 58% of the residents disagreed. A well-designed checklist chart rather than a descriptive chart was preferred by 89% of the residents. Conclusion: The currently used ED medical records have much room for improvement. The age of the ED had little impact on the quality of ED medical records. More attention and effort in this field are needed. In addition, The Korean Society of Emergency Medicine should provide guidelines for ED medical records.
탄화시간과 활성화가스의 종류에 따른 PAN계 활성탄소섬유의 제조
김기원,정승훈,임연수 명지대학교 대학원 1998 대학원논문집 Vol.2 No.-
Most activated carbon are manufactured by mild oxidation of chars obtained from various carbonaceous materials. The activation process leads to development of surface area and porous structure of a carbonized product. Activated carbon fiber(ACF) is a relatively new material for adsorption which has a characteristic of higher adsorption rate and larger capacity than conventional carbon. ACF were prepared from stabilized PAN fibers. Prior to the activation, the stabilized PAN fibers were carbonized at 900℃ in nitrogen atmosphere for 15, 30 and 60min. These carbon fibers were activated at 900℃ in steam, carbon dioxide for 1hrs. In this study, effects of the activating gases, carbonization time on activation yield and surface area of PAN based activated carbon fibers were mainly studied.
김기원,정승훈,임연수 명지대학교 대학원 1998 대학원논문집 Vol.2 No.-
Activated carbon fiber(ACF) is a prospective adsorbent which has attracted much attention for several years. It has attractive properties such as high surface area, rapid adsorption/desorption rate and multi-using form. Chemical activation can be carried out at lower temperature, give higher yield and less devolatilization of raw materials than physical activation. Activated carbon fibers were prepared from stabilized PAN fibers by chemical activation with potassium hydroxide. Chemical activation was carried out by heat treatment of their fibers which were impregnated by dipping in water solution of KOH for 24 hours. The heat treatment temperatures were 500℃, 600℃, 700℃, 800℃ and 900℃, respectively. Yield, specific surface area and SEM micrograph of ACFs with the different activation conditions such as concentration of KOH and activation temperature were evaluated.