공동주택의 장수명화 및 재생을 위한 IHCS 표준모델 개발 : 개념 및 특성을 중심으로 With a focus of Concept and Character

최경석,강재식,양관섭,이승언 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

Recently Excessive national resources, energy losses and social·economical problems are induced by reconstruction apartment housing which was constructed about 20 years and is enough to keep one's residence structurally. Especially, the greatest obstruction in longevity & recycling technology of apartment housing is the current Ondol system of wet process integrated structures. Also the current Ondol system is difficult to improve due to its character of material and process. The object of this study is to develop IHCS(Infill Heating & Cooling System) standard model with prefabricated & dry process that shall be the substitution for the current wet Ondol system.

지도영상으로부터 심볼 추출과 인식

김형석,최관순 순천향대학교 1991 논문집 Vol.14 No.3

In Geographic Mapping system, Facility administration is going to be computerized for secure and efficient maintenance, and it is needed to input many already existing geographic map into computer system. Then it is required to extract symbols and recognition them. Thus we developed an automatic symbol extraction and recognition system for geographic map. which enabled to input such map, at recognition rate over 85%.

유한요소법을 위한 초기요소망 구성에 관한 연구

김형석,최관순 순천향대학교 1993 논문집 Vol.16 No.3

This paper describes a method for mesh generation of arbitrary polyhedra. This method is based on Delanuay's triangulation whose dual is well-known Vornoi's diagram. Firstly, this algorithm divides analysis model into a finite set of elements using minimum input data for depicting its boundary shape. And interior node placement can being using a proposed strategy . Finally, the connectivities are fixed and the nodes are repositioned to produce elements with somewhat improved shapes. The technique we use is called Laplacian smoothing.

규칙적인 수영운동이 중년여성의 체력수준에 미치는 효과

조홍관,윤석창,최명식 군산대학교 체육과학연구소 1999 體育科學硏究所 論文集 Vol.1 No.-

This study was to test the relationship between regular physical exercise and physical fitness in middle aged women. These subjects were 55 volunteers who agreed with intention of this study and were composed of 20 active group(B), 15 active group (C) and 20 non-active group. The selected physical fitness tests were grip strength and back strength for measuring muscular strength, sargent jump and standing broad jump for measuring power, push-up, sit-up, and heart rate for measuring total endurance, reaction time and side step test for measuring agility, stick test and stork stand for measuring balance, and trunk flexion and trunk extension for measuring flexibility. The conclusion acquired was as follows: 1) Grip strength had significant difference between active group(C) of 21.9±6.1 kg and non active group of 28.2±7.0 kg (p<.05). 2) Sargent jump was significantly higher active group(B) of 36.2 ±7.2 cm than with non-active group of 30.4±8.2 cm (p<.05), and higher with active group(C) of 42.4±11.4 cm than with active group(B) of 36.2±7.2 cm (p<.05). Standing broad jump was significantly higher with active group(B) of 167.6±24.5 cm than with non-active group of 146.8±23.9 cm (p<.05), however, was not significant difference between active group(B) and active group(C). 3) Push-up showed significant difference between active group(C) of 11.4±2.8 times and non-active group of 7.2±4.8 times(p<.05), and sit-up between active group(C) of 17.0±4.5 times and non-active group of 13.4±4.9 times(p<.05), and heart rate between active group(C) of 110.9±9.8 beats/min and non-active group of 123.4±10.2 beats/min (p<.05). 4) Reaction time was significantly higher with non-active group of .371±0.26 sec than with active group(C) of .331±0.26 sec(p<.05), and higher with active group(B) of .331±0.26 sec than with active group(C) of .312±0.41 sec (p<.05). Side step test was lower with non-active group(13.2±1.6 times) than with active group(B)(14.2±1.4 times), however, was not significant. 5) Stick test showed not significant difference between active group(C) of 11.5±3.6 sec and non-active group of 10.5±4.2 sec, and stock stand between active group(C) of 4.5±0.7 sec and non-active group of 4.0±0.9 sec. 6) Trunk flexion came out not significant difference between active group(C) of 17.0±7.3 cm and non-active group of 16.8±7.1 cm, and trunk extension between active group(C) of 42.2±8.8 cm and non-active group of 43.8±6.9 cm.

3D 온라인 슈팅 게임 개발 : "3D 포트리스"

金敬植,崔勝寬,寓昔珍,申一卿,朴勝浩,李東熙,李東建,張孝善 호서대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.19 No.-

In this paper, features and efficiencies of the 3D engine are described which has been developed through the research of 3D real time rendering techniques. And an on-line shooting game "3D Fortress" which has been developed using this 3D engine with server technologies is introduced for the techniques and methodology applied in the process of development of the game as well as the features and discussions of its implementation.

관동맥풍선시술중 혈전동반 병변에 대한 구조치료(Rescue Utilization)로서의 Abciximab(ReoPro^(�)의 효과

두영철,채경수,최종형,허필석,송관욱,홍경순,박대균,한규록,오동진,유규형,임종윤,고영박,이광학,이영 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.12

외상후 발작의 위험인자에 대한 조사

이재학,배학근,윤석만,도재원,이경석,윤일규,최순관,변박장 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Risk Factors for Posttraumatic Seizure The authors evaluate the risk factors for posttraumatic seizures. this prospective study was performed in a series of 470 head injured patient from January 1996 to Decomber 1998. The patients who were dead within 1 week of injury or children from 3 years old and under were excluded. There were 358 male and 112 female with a mean age of 35.2±22.8 years (range, 4-88 years). The results were as follows : 1). Of the 470 patients, pasttraumatic seizure occurred in 48 patients(10.2%): early seizure in 28(6%) and late seizure in 20 patients(4.2%). 2). The clinical risk factors for posttraumatic seizure were poor consciousness at admission, presence of brainstem herniation signs, poor GCS score, and posttraumatic amnesia more than 24 hours after trauma(p<0.001). 3). The radiological risk factors for posttraumatic seizure were subdural hematoma(p<0.001), intracerebral hematoma (p<0.02), mutiple intracranial CT lesions(p<0.001), or delayed lesions on follow-up CT scans(p<0.001). the incidence of seizure increased according to the severity of diffuse brain lesion(p<0.001), and the seizure rate in mass lesion was higher than that in diffuse lesion(p<0.001). 5). Hypoxia and coagulopathy had a statistically significant influence on posttraumatic seizure(p<0.05). Hypoxia had a infuence on occurrence of late seizure(p<0.05). 6). The incidence of posttraumatic seizure signiticantly increased in surgical group compared with coservative group(p<0.001) and significantly increased in patient who underwent decompressive craniectomy compared with those who underwent craniotomy(p<0.001) 7). Preventive administration of antiepileptic drugs decreased the incidence of early seizure, but did not affect on the reduction of late seizure. 8). Multivariate logistic regression analysis showed the subdural hematoma, GCS score, delayed lesion, and intracerebral hematoma in order of importance for seizure risk. in conclusion, the risk factors affecting on the occurrence of seizure were clinical status at admission, CT lesions, and severity of diffuse brain inJury. Considering that hypoxia affected on the late seizure, it is necessary to detect and treat it immediately after trauma. In addition, the patients who underwent decompressive craniectomy should be carefully followed to evaluate the risk of late seizure. Even though preventive administration of antiepileptic drugs had a tendency to decrease the incidence of early seizure, it is unclear whether administration of antiepileptic drugs can reduce the incidence of posttraumatic seizures. Prospective study will be needed in the selected patients.

자발성 뇌지주막하 출혈 환자에서 최초 뇌실 크기의 임상적 의의

신일영,윤일규,윤석만,도재원,이경석,배학근,최순관,변박장 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

The purpose of this study is to invesetigate the clinical significance of initial enlargement of ventricle in the patients who had aneurysmal SAH. Of the total 821 patients with aneursmal SAH who were registerd in SAH data bank system between 1989-1999, 307 patients who had been already measured in the size of ventricle at the time of admission, were studied retrospectively. The size of ventricle was calculated by bifrontal index. Normal size of ventricle was defined as 30% or less, mild enlargement was defined as 31 to 39%, and moderate enlargement of vertricle was defined as more than 39% in bifrontal index. The sizes of ventricle using bifrontal index were analysed according to the age, sex, blood pressure, consciousness at admission, medical history of hypertension, location of ruptured aneurysm, Fisher's grade on CT(computerized tomography) scan at the time of admission, cerebral vasospasm, intraventricular hemorrhage (IVH), performance of external ventricular drainage (EVD), and prognosis at discherge. Chi-square test and ANONA were used in the statistical evaluation. The results were as follows : 1) Of the 307 patients, 235(76.5%) had a mild to moderate enlargement of ventricle at the time of admission (more than 30% in bifrontal index). 2) The size of ventricle was enlarged according to the increase of age (p<0.05). 3) In the patients who had ruptured aneurysm on anterior cerebral artery, the size of ventricle significantly increased and showed a higher incidence in mild enlargement compared with moderate enlargement of ventricle (p<0.05). 4) The size of ventricle increased in th patients who had IVH and the EVD was more frequently performed in th patients who had the enlarged ventricle associated with IVH (p<0.05). 5) In the patients who had high Fisher's grade, the size of ventricle had a tendency to increase, but there was no statistical significance. 6) In the patients who had poor prognosis, the size of ventricle had a tendency to increase, but there was no statistical significance. Conclusively, the initial size of ventricle was enlarged in th aged patients, ruptured aneurysm on anterior communicating artery, high FIsher's grade, patients associated with IVH. Considering those factors, prediction for the enlargement of ventricle size may help to treat the patients suffering aneurysmal SAH.

Simultaneous flow enhancement of high-filled polyamide 66/glass fiber composites

Choi, Hwan Seok,Lim, Dohyun,Kim, Dong-Gyun,Kim, Byoung Gak,Kim, Yong Seok,Lee, Sung-Goo,Kim, Sang Gu,Park, Byung Wook,Seo, Kwan Ho,Yoon, Ho Gyu,Yoo, Youngjae Elsevier 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.722 No.-

<P><B>Abstract</B></P> <P>In this work, we investigated the effects of the flow modifier addition on the rheological behavior and mechanical properties of high-filled polyamide 66 composites prepared from melt compounding. The flow modifiers were prepared from various amine monomers and fatty acids, and their structures were analyzed by Fourier transform infrared spectroscopy. The synthesized flow modifiers were added simultaneously during melt compounding. The presence of flow modifiers significantly reduced torque in neat polyamide 66 polymer and glass fiber-reinforced polyamide 66 composites, respectively, while the torque during compounding in composites with glass fiber contents of 50 wt% has decreased by approximately 12% after the addition of 1 phr of hexamethylene <I>bis</I>-stearamide indicating the simultaneous enhancement in flowability. The presence of the synthesized flow modifiers in matrix polymers improves flowability of the composites during injection molding without compromising the mechanical properties.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Amide-based flow modifiers were successfully prepared. </LI> <LI> Image analysis of glass fiber in the composites was directly correlated with the properties of the composites. </LI> <LI> Analytical model analysis shows good agreement with the properties of the composites. </LI> </UL> </P>

경량기포콘크리트 대체 패널공법 적용에 따른 바닥충격음 및 단열성능 평가에 관한 연구

최경석(Choi Gyeong-Seok),최현중(Choi Hyoun-Joung),김경우(Kim Kyoung-Woo),강재식(Kang Jae-Sik),양관섭(Yang Kwan-Seop) 한국건축친환경설비학회 2007 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-

Ondol is a traditional Korean heating system with a long history. The ondol heating system is a default in ordinary houses and high-rise apartments alike. A new system capable of freely changing the interior space is being developed as exemplified by the prevalence of the dry process due to the popularity of high-rise buildings, and SI housing. However, as ondol uses cement and water, it is heavy and needs curing time, which is a shortcoming. This study examined a new ondol system that answers the call of the times by improving the existing concept of ondol. The floor impact sound isolation and thermal performance of the panel-type structure using Styrofoam granules, cement and plaster was examined.