문화재 및 산림화재 방재에 관한 연구

김유식(Kim, Yoo-Shik),허근식(Heo, Geun-Sik),신민종(Shin, Min-Jong),김대환(Kim, Dae-Whan) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계

중요 목조문화재 방재시스템 구축

김진곤(Kim, Jin-Kwon),김유식(Kim, Yoo-Sik),김엽래(Kim, Yup-Rea),윤명오(Yoon, Myung-Oh),김태환(Kim, Tae-Hwan),김상구(Kim, Sang-Gu),김성도(Kim, Sung-Do),이성희(Lee, Sung-Hee),박정렬(Park, Jeung-Yeul),엄태평(Um, Tae-Pyung),석혜민(Suk, H 한국화재소방학회 2007 한국화재소방학회 학술대회 논문집 Vol.2007 No.춘계

문화재 및 중요목조물 소화설비 개발에 관한 연구

김창(Kim, Chang),김유식(Kim, Yoo-Sik) 한국화재소방학회 2007 한국화재소방학회 학술대회 논문집 Vol.2007 No.추계

蔚州郡 立岩里 出土 蓮花文圓瓦當에 對한 小考

金有植 위덕대학교 박물관 2001 佛敎考古學 Vol.- No.1

입암리(立岩里) 유적지는 경주(慶州)를 벗어난 지역에서 삼국시대의 연화문(蓮花文)수막새가 출토되어 기와 전공자들이 주목하는 곳이다. 이 곳은 행정구역상 울산광역시(蔚山廣域市) 울주군(蔚州郡) 범서면(凡西面) 입암리(立岩里)에 해당한다. 입암리 부근에는 반구대암각화(盤龜臺岩刻畵)와 대곡리각석(大谷里刻石) 등 유명한 유적지가 있으며. 인근인 언양(彦陽)과 문수산(文殊山)일대에도 간월사지(澗月寺址)를 비롯하여 청송사지(靑松寺址), 영축사지(靈鷲寺址), 망해사지(望海寺址) 등 통일신라시대 창건된 사찰이 위치하고 있다. 이 유적은 마을 중앙에 있는 얕은 산의 동사면(東斜面)에 위치한다. 현재 이 곳 주위에는 기와만이 출토되며, 여타 다른 유물은 보이지 않아 유적의 성격 파악이 어렵다. 입암리 유적지에서 출토된 연화문수막새는 크게 4형식으로 구분된다. 연화문수막새인 A와 B형식은 주연이 돌출되고, 양감이 풍부한 꽃잎이 특징적이다. 또한 A·B형식 기와들은 고온에서 소성하였기 때문에 표면이 단단하다. 두 형식은 경주 인근의 월성(月城), 분황사(芬皇寺), 전랑지(殿廊址) 등에서 출토된 수막새와 형식면에서 유사하며, 제작년대는 6세기후반~7세기전반으로 추정된다. C형식은 꽃잎의 양감이 급격히 약화되며, 중앙자방의 연자 수가 증가되는 특징을 보인다. C형식의 기와는 경주인근의 중산리(中山里) 폐사지(廢寺址), 안압지(雁鴨池) 출토 수막새와 동일한 계통이며, 제작년대는 삼국 말기로 추정된다. D형식의 수막새는 모두 통일신라 후기에 제작된 것으로 보인다. 입암리 유적지는 당시 수도와 가까운 거리에 위치하고 있을 뿐만 아니라 기와의 형식이 경주 인근 출토 기와들과 유사점을 보여 수도의 영향이 지대하였음을 알 수 있었다. 향후 이 유적지는 발굴을 포함한 조사가 진행되어 성격이 밝혀진다면, 6~7세기 신라기와의 발전과정과 당시 수도 부근의 교류관계 측면을 이해하는데 도움이 될 것이다. The Ibam-ri sites, being apart from Gyeongju, attract the researchers majoring in tile because of the excavation of the roof-end tiles of the period of the three Kingdoms. There are many temple sites created during the Unified Shilla period such as Ganwol Temple Site(澗月寺址) nearby Ibam-ri. But now, it is difficult to analyze the remains of Ibam-ri such as the structure of the ruins, because the Ibam-ri sites have not been finished to excavate. The roof-end tiles excavated from Ibam-ri can be divided as 4 types. In A and B types, the edge protrudes and the petals are voluminous. And they are similar to the types of the roof-end tiles excavated from Bunhwang Temple,(芬皇寺) Wolsung,(月城) and Building Site, Sungdong-dong(殿廊址) nearby downtown of Gyeongju, and the time scope of their production, we guess, is from the late 6th century to the early 7th century. In C type, the volume of petals decreases suddenly and the roof-end tiles have the same design as the roof-end tiles excavated from Jungsan-ri Temple Site(中山里寺址) and Anabji(雁鴨池) have. The time scope of its production, we guess, in the late period of the three Kingdoms. All the roof-end tiles of D type, we guess, were produced after the middle period of the Unified Shilla. We come to conclude that Ibam-ri is the exchange place with its capital, Gyeongjo, because the Ibam-ri sites are at a short distance from Gyeongju, and its roof tiles are similar to the roof tiles excavated from the places nearby Gyeongju.

프리플렉스 빔의 정수형 최적설계에 관한 연구

김형길,전용성,김유식 한밭대학교 건설안전기술연구소 2002 건설안전기술논문집 Vol.2 No.-

In this study, a computer program is developed for analysis of the preflex composite beams which is able to calculate automatically the bending stresses and deflections for every construction steps in order to examine whether the maximum values are within the allowable ones or not. To verify the accuracy of the proposed computer program, its results are compared with those by the other theoretical studies. Using the proposed computer program. In this study, the various influence of design parameters are studied and their results are analyzed. In this study, the structure used in parametric investigation is preflex composite bridge with the span length of 30 meters, the girder height of 1.2 meters and the girder distance of 2.8 meters. A total number of parameters are nine which is used for the analysis. From the results of parametric investigations considering the construction steps of preflex composite beams, the stresses at lower flange concrete are closed to allowable ones and their influences are very sensitive. To extremize the efficiency of the section design, the safety of lower flange concrete must by guaranteed and the accurate structural analysis must be accompanied.

스파크점화 기관의 회전형 흡배기장치의 개발에 의한 체적효율 향상에 관한 연구

김치원,윤창식,김유식 경남대학교 신소재연구소 1995 論文集 Vol.5 No.-

최근 자동차용 기관의 연구에 있어서는 고성능, 고효율과가 추진되고 있으며, 본 연구에서도 기관의 체적효율 향상을 달성하기 위하여 회전밸브를 설계 제작하였으며 기존의 포핏밸브와 실험적 방법을 통하여 비교하였다. 본 연구의 결과 회전식 흡배기 밸브장치에서 유입유동 저항이 현저하게 낮아짐으로서 체적효율의 향상을 기할 수 있었으며, 따라서 자동차용 기관의 성능이 높게 나타남을 확인할 수 있었다. In recent years, the study on the high efficiency of the internal combustion engine has been mainly proceeding. In this study, we developed rotary valve to achieve the improvement of volumetric efficiency and to be simple construction. And then made a comparative analysis between rotary and poppet valve. In this experiment, rotary valve enlarged the flow area of valve port to minimize the resistance of the fluid flow and to flow smoothly in intake and exhaust process. Indeed, valve timing was controlled properly lest positive pressure in exhaust process should affect intake process. Motoring and firing experiments were using engine speed and air-fuel ratio a s the principle parameter and the full opening of throttle valve and minimum spark advance for best torque(MBT) as engine operating variables.

몬테카를로법에 의한 규격부재 구조의 최적설계에 관한 연구

김형길,서상구,김유식 한밭대학교 건설안전기술연구소 2003 건설안전기술논문집 Vol.3 No.-

An algorithm for optimal design of structures with discrete of specified design variables is developed. A computer program is written to test validity and efficy of the algorithm with various example problems of minimum weigh truss design subject to displacement, stress, and design variable constraints. As the results, it is found that the algorithm is highly stable and can be readily applicable to various structural optimization problems with discrete set of specified design variables.

선원사지 출토 고려후기 기와의 검토

김유식 동국대학교 박물관 2003 佛敎美術 Vol.17 No.-

A lot of roof tiles are excavated at Seonwonsa temple site. Roof tiles excavated at this temple site have various designs. Roof tiles excavated at Seonwonsa temple site are seemed to be producted from middle Goryeo period to early Joseon period. Roof tiles excavated at Seonwonsa temple have some characteristics. First, these roof tiles seem to be concentratively producted from middle Goryeo period to early Joseon period. This result is certified by the roof tile design. The general roof tiles have the lattice design, fish bone design, and condensed line design. Also wave design that became popular in Joseon period is expressed on the tiles, so Seonwonsa temple is supposed to be maintained by early Joseon period. The general roof tiles have developed from simple design to complcated design. Second, louts design, ghost eye design, and sanscrit character design are the main design of male roof end tiles. In case of roof end tile with lotus design the wide petal form commands an overwhelming majority. This form is supposed to be the main roof end tile at the prosperity of Seonwonsa temple. Third, roof end tile with sanscrit character design is diveided into two forms according to an ovary. The first form has the ghost eye design in the ovary. The second form has the sanscrit character design. The first form is supposed to precede the second form. Fourth, in case of female roof end tile arabesque design, sanscrit character design, flower design are the main form. Of all these designs arabesque design is supposed to be the precedant. Fifth, the various figures(雜像) excavated at Seonwonsa temple site are divided into four types- dragon head, dragon shaped animal, human figure, and animal figure. These figures do not restore, so it is difficult to figure out the real shape. But dragon head and dragon shaped animal are deorated with intaglio on the surface. Roof tiles excavated at Seonwonsa temple site are seemed to be producted from middle Goryeo period to early Joseon period. These roof tiles have the important value to study roof tile form of late Goryeo period.

정수형 변수 변환방법을 이용한 이산형 最適設計

박찬규,권준원,김유식 한밭대학교 건설안전기술연구소 2002 건설안전기술논문집 Vol.2 No.-

In this study, a computer program is developed for optimum design of the reinforced concrete frames which is able to calculate automatically the optimum variables and total construction cost by the integer variable transformation method. To verify the accuracy of the proposed computer program, its results are compared by the various type of frames. Using the proposed computer program, the various influence of design parameters are studied and their results are analyzed. In this study, the structure used in parametric investigation is frame of 1 bay and 2 bay in 1st story with the beams length of 3.0∼4.5 meters, the columns height of 3.0∼4.5 meters. A total number of parameters are five which is used for the analysis. From the results of parametric investigations considering frames, the convergence are closed 1~ 9 cycle and their influences are very effective. To maximize the efficiency of the section design, the safety selection of reinforce size must be guaranteed and the accurate structural analysis must be accompanied.