휫스턴 브리지를 응용한 기능성 스마트 콘크리트의 개발

성원경,김이성,김화중 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

Various structural materials have been used in construction projects using stones, concretes, and steels materials. Among of these projects, concretes may use widely because concretes have high compressive strength, and comparatively easy maintenance and management. Reinforced concrete Buildings will be deteriorated as time passed. These problems will be accelerated by propagation of cracks. In order to manage such cracks, time, efforts and expense are required. In this study, leakages of fluorescence and adhesive material were investigated using glass sensors that were embedded in a model beam and column. In addition, currents in glass pipe sensor were observed to find leakage of liquid in glass pipes. Progressive cracks were generated by fracture of glass pipe sensor. In this investigation, a reinforcement clothing system was wrapped for a glass pipe sensor. The glass pipe sensor that can make control and reinforce cracks simultaneously.

유리관을 이용한 스마트 콘크리트의 개발

김이성,윤종문,김화중 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The R.C building will be superannuated if time passes. This cause is generated by propagation of a crack. In order to notice such a crack, time and efforts, expense, etc, that have exhausted. Various technologies were developed to improve its properties related to strength and workability during construction. Performance degradation of concrete structures is generally caused by the deteriorations, such as surface collapse, pop-out, crack, and so on. The deterioration mechanism of concrete is very complex. Detection of the degradation and fracture inside of concrete is also very difficult. A method to detect or cure the concrete crack have been developed in this study. They are by using small glass-pipe sensors. Experimental study shows good performance for detecting crack(small glass-pipe sensors) inside of the concrete.

자기손상자현 스마트 콘크리트 개발

김이성,윤요현,김화중 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

The purpose performance degradation of concrete structures is generally caused by deteriorations, such as surface collapse, pop-out, crack, and so on. It may result in serious defects of the concrete structures. Thus it is very important 세 detect and repair the defects of concrete structures within a proper time to assure the structural safety. However, the defects due to the deteriorations are usually difficult to find by visual inspection. A sensor is developed in this study, which may give early indication for degradation of concrete structures and show the location of the damage. Cracks can be defected by the liquid in a small glass capsules which are embedded in the concrete structures. This paper discusses the applicability of that was developed smart concrete.

휫스턴 브리지를 응용한 스마트 콘크리트의 개발

김이성,성원경,김화중 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3

Various structural materials have been used in construction projects using stones, concretes, and steels materials. Among of these projects, concretes may use widely because concretes have high compressive strength, and comparatively easy maintenance and management. Reinforced concrete Buildings will be deteriorated as time passed. These problems will be accelerated by propagation of cracks. In order to manage such cracks, time, efforts and expense are required. In this study, leakages of fluorescence and adhesive material were investigated using glass sensors that were embedded in a model beam and column. In addition, currents in glass pipe sensor were observed to find leakage of liquid in glass pipes. Progressive cracks were generated by fracture of glass pipe sensor. In this investigation, a reinforcement clothing system was wrapped for a glass pipe sensor. The glass pipe sensor that can make control and reinforce cracks simultaneously.

탄성파 토모그래피를 응용한 건축부재의 손상추정

최영화,김이성 대구대학교 특수교육재활과학연구소 2010 産業技術硏究 Vol.21 No.1

The theory of wave propagation uses mathematical theories including functional analysis, probability differential equation and numerical analysis, and this is mathematically based on the wave propagation phenomenon occurring in random media. Acoustic equation, Maxwell equation and Elastic equation, etc, are used as equations of mathematical model. When the damage and strength of main elements and structures are tested using acoustic emission, detection may be impossible depending on the size of the specimen, the smoothness of the surface, the complexity of the shape, the direction of the defect, and the arrangement of the steel bars, among others. In addition, detection is also difficult when these are relating problems to the internal crystal grain size pore, segregation, as well as foreign matter. Many problems also arise from the attachment of sensors to the specimen for using the direct-contact method

고온에서 콘크리트의 배합특성 변화에 따른 열전도율에 관한 실험 연구

이영생,김이성,김화중 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

A structure is performed the result currently by becoming high-storied building, a large size, and multi-function gradually recently as a method proposal of correspondence by centralization of an institution and institution centralization of city population. Moreover, it is a fact that a building also increases the fire outbreak danger by this proportionally high-storied building and by being enlarged and going Therefore, in this research, when adding high temperature to concrete, the thermal conductivity of physical-properties by time elapes tend to be drawn through an experiment, and it is going to examine the relation

變斷面 Ⅰ-型 曲線보의 影響線에 관한 硏究

장병순,공영이,서상근 釜山大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.51 No.-

곡선 부재의 최대 전단력, 최대 휨 모멘트, 최대 순수 비틂, 최대 ��綢� 최대 바이 모멘트 등을 구하기 위해서는 곡선 부재에 작용하는 활하중의 위치를 구하는 것이 중요하므로 영향선을 이용하면 위의 각 단면력을 쉽게 구할 수 있다. ��효과를 갖는 곡선 부재의 거동에 관한 기초 미분 방정식은 Vlasov가 개발하였고, 전단력, 훰 모멘트, 순수 비틂, ��綢� 바이 모멘트를 유한 차분법으로 해석하였다. 본 논문에서는 변단면 곡석 Ⅰ형 부재에서 단위 수직 하중과 단위 비틂 모멘트가 작용할 때 발생하는 전단력, 훰 모멘트, 순수 비틂, ��비틂, 바이 모멘트의 영향선을 유한 차분법으로 구하였다. 실제 하중이 작용할 때, 등단면 및 변단면 곡선 부재의 단면력은 본 논문에서 구한 영향선을 이용하면 쉽게 계산할 수 있다. In order to determine the maximum shear force, the maximum bending moment, the maximum pure torsion, the maximum warping torsion, and the maximum bimoment for the curved girder, it is very important to find our the location of live load applying to the curved girder before they can be estimated respectively by using the influence line. The fundamental differential equation concerning the behaviour with warping effects for the curved girder was developed by Vlasov. Also, shear force, bending moment, pure torsion, warping torsion, and bimoment for curved Ⅰ-girder were analyzed by the finite difference method. In this paper, influence lines of shear force, bending moment, pure torsion, warping torsion, and bimoment due to unit vertical load and unit torsional moment for curved constant and variable cross section Ⅰ-girder are obtained from using the finite difference method. The intemal force of the constant and variable cross section curved girder where the actual load is applied can be calculated easily by using the influence line obtained from this study.

원심력 성형을 위한 폴리머 경계블록의 배합 결정에 대한 실험 연구

장주영,윤종문,김이성,김화중 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

Process of the Concrete waste is recently become gradually for difficult environment and other problems. Because it cannot search for reclaiming place for remnant of re-development buldings, the pending development project was broken out. But, concrete waste have a various recycling method and fixing the environment problem. Use of Unsaturated Polyester resin is better than cement on a strength and durability. Also, use of a centrifugar force in forming process is expected more effective viewed in a durability against environment influence. Therfore, the purpose of this study seek for proper proportion through a prior experiment to make curbs with recycling aggregation and sludge from concrete waste. Then it apply to centrifugar force mold. The experimental mixing proportion was planned to acquire of a optimum workability and filling capability of resin mortar mixed with using the recycled aggregate.

Association of programmed cell death 1(PD-1) with susceptibility to Ankylosing Spondylitis in Korean population

( Sang Hoon Lee ),( Yeon Ah Lee ),( Doo Hyun Woo ),( Hyang Ie Lee ),( Seung Jae Hong ),( Eun Kyung Park ),( Mi Hyun Ryu ),( Young Hoon Kim ),( Kyoung Soo Kim ),( Hyung In Yang ) 대한내과학회 2005 대한내과학회 추계학술대회 Vol.69 No.10

Pedunculated mucinous cystic neoplasm of the liver: a case report

Sang-Woo Ha,Shin Hwang,Hyejin Han,Song Ie Han,Seung Mo Hong 영남대학교 의과대학 2022 Yeungnam University Journal of Medicine Vol.39 No.3

In 2010, the World Health Organization classified mucin-producing bile duct tumors of the liver into two distinct entities; mucinous cystic neoplasm of the liver (MCN-L) and intraductal papillary mucinous neoplasm of the bile duct. We present the case of a patient with MCN-L having a uniquely pedunculated shape. A 32‐year‐old woman was referred to our institution with a diagnosis of biliary cystic neoplasm. She had undergone left salpingo-oophorectomy for ovarian cancer 15 years ago. Imaging studies showed an 8 cm-sized well defined, multiloculated cystic lesion suggesting a mucinous cystic neoplasm. The cystic mass was pedunculated at the liver capsule and pathologically diagnosed as MCN-L. The mass was resected with partial hepatectomy. The patient recovered uneventfully. She was discharged 7 days postoperatively. The patient has been doing well for 6 months after the operation. The patient will be followed up annually because of the favorable postresection prognosis of MCN-L.