유연·신축성 전자 소자 개발을 위한 은 나노와이어 기반 투명전극 기술

김대곤,김영민,김종웅,Kim, Dae-Gon,Kim, Youngmin,Kim, Jong-Woong 한국마이크로전자및패키징학회 2015 마이크로전자 및 패키징학회지 Vol.22 No.1

Recently, advances in nano-material researches have opened the door for various transparent conductive materials, which include carbon nanotube, graphene, Ag and Cu nanowire, and printable metal grids. Among them, Ag nanowires are particularly interesting to synthesize because bulk Ag exhibits the highest electrical conductivity among all metals. Here we reviewed recently-published research works introducing various devices from organic light emitting diode to tactile sensing devices, all of which are employing AgNW for a conducting material. They proposed methods to enhance the stretchability and reversibility of the transparent electrodes, and apply them to make various flexible and stretchable electronics. It is expected that Ag nanowires are applicable to a wide range of high-performance, low-cost, stretchable electronic devices.

원발성 Achalasia 와 근치적 밸룬확장

김대곤,박태선,김정권,안득수,김형곤 ( Dae Gohn Kim,Tae Sun Park,Jung Gweon Kim,Deuk Soo Ahn,Hyeong ghon Kim ) 대한소화기학회 1988 대한소화기학회지 Vol.20 No.3

λ 형 위기형

김대곤,장현철,김정은,안득수,김재천,김종수 ( Dae Ghon Kim,Hyun Cheol Jang,Jung Eun Kim,Deuk Soo Ahn,Jae Chun Kim,Jong Soo Kim ) 대한소화기학회 1989 대한소화기학회지 Vol.21 No.1

KBC 비구조요소 내진설계 하중

김대곤,Kim, Dae-Kon 한국공간구조학회 2014 한국공간구조학회지 Vol.14 No.1

Simple 3, 10, and 30-story buildings with a nonstructural element which is located at roof or near the middle of the building height are selected. Based on 2009 Korean Building Code, the seismic design force applied at the nonstructural element is evaluated. Response spectrum analysis is conducted with the design response acceleration spectrum of 2009 Korean Building Code and the analytical response is compared with the seismic design force from the Code. Furthermore, an artificial earthquake based on Korean design response acceleration spectrum and the 50% intensity of El Centro earthquake, which can be considered as the maximum future earthquake possibly occurring in Korea, are selected to conduct time history analysis. When the period of the nonstructural element is shorter than 0.06 second or longer than that of the 1st period of each building, the Code equations of seismic design force for nonstructural element seems to be appropriate. However, the period of the nonstructural element is close to the one of the building's higher mode periods including the 1st period, seismic force of the nonstructural element might exceed the Code specified seismic design force.

디바이스 내장형 플렉시블 전자 모듈 제조 및 신뢰성 평가

김대곤,홍성택,김덕흥,홍원식,이창우,Kim, Dae Gon,Hong, Sung Taik,Kim, Deok Heung,Hong, Won Sik,Lee, Chang-Woo 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.3

These days embedded technology may be the most significant development in the electronics industry. The study focused on the development of active device embedding using flexible printed circuit in view of process and materials. The authors fabricated 30um thickness Si chip without any crack, chipping defects with a dicing before grinding process. In order to embed chips into flexible PCB, the chip pads on a chip are connected to bonding pad on flexible PCB using an ACF film. After packaging, all sample were tested by the O/S test and carried out the reliability test. All samples passed environmental reliability test. In the future, this technology will be applied to the wearable electronics and flexible display in the variety of electronics product.

한국토종닭과 교잡종의 나이와 성에 따른 근섬유의 조직화학적 특성 비교

김대곤,권연주,성삼경 ( D . G . Kim,Y . J . Kwon,S . K . Sung ) 한국축산학회 1997 한국축산학회지 Vol.39 No.5

N/A This study was carried out to examine the histochemical properties of muscle fiber in Korean Native chickens(KNC). Wangchoo(crossbred) and broiler were used as controls in this study. Live weight and the weight of the pectoralis profundus and iliofibularis muscles differed greatly among breeds. The largest live weight and muscle weight were obtained in broiler, the next in crossbred and the smallest in KNC. In percentage distribution of each fiber type, based on the reactivities for myosin adenosine triphosphatase and reduced nicotinamide adenine dinucleotide dehydrogenase., the pectomlis profundus muscle was composed only of type IIW fibers throughout the experimental period in all breeds. However, the iliofibularis muscle was composed of type IR, IIR and IIW fibers. In the iliofibularis muscle, the highest frequency of type IIR fibers occured in the breeds, and type IR was the lowest percentage. In the same fiber type, the activities of reduced nicotinamide adenine dinucleotide dehydrogense were different among the breeds. When KNC was compared with the crossbred, it showed higher frequency of type IIR fibers and lower frequency of type IIW fibers. The percentage of type IIR fibers of the female was higher than that of the male. The largest diameter of fiber was measured in broiler and the smallest in KNC, and the male had larger diameter than the female. A breed with larger body weight or iliofibularis muscle weight was exhibited larger diameter in each fiber type compared to the other breeds. At 7 weeks age, the largest diameter was measured in type IIt of crossbred, but diameter of type IIW was the largest in KNC. Broiler was the largest in the diameter of type IIW fibers at 7 weeks age, but the crossbred and KNC was the largest in the diameter of type IR fibers at 15 weeks age.

SWAT 및 HEC-RAS모형을 활용한 유역 내 토사수지분석기법

김대곤,정태성,류권규,Kim. Dae Gon,Cheong. Tae Sung,Yu. Kwon Kyu 한국방재학회 2012 한국방재학회논문집 Vol.12 No.6

하천내에서 각종 사업을 시행하면, 그로 인해 하천에서는 토사유출, 하상 저하에 따른 인공 구조물의 기초부 손상, 댐 저수지에서의 퇴적, 해안 침식 등과 같은 토사이동에 관련된 문제가 발생하게 된다. 이러한 토사의 유출-거동을 종합적으로 파악하는 것이 토사수지분석이다. 본 연구는 유역유출 모형과 하상변동 예측 모형을 이용하여 토사수지분석을 위한 새로운 방법을 제안하였다. 낙동강 주요 지류 중 하나이며 영주댐 건설이 계획된 대표적인 충적하천유역인 내성천에 모형을 적용하고 모형의 검정과 적용성 검토를 수행하였다. 모의결과 모형은 자연하천에서의 토사유출-거동을 잘 재현하는 것으로 나타났다. 특히, 모형은 내성천에서 실측한 유사량과 유사한 계산결과를 보이는 것으로 나타났다. 내성천 유역의 토사수지 분석결과 총 1,704만톤의 토사손실이 발생한 것으로 나타났으며 이들은 대부분 하도침식에 의한 것으로 추정된다. 제안된 방법은 자연하천에서 토사수지분석이나 토사이동 관련 재해위험도저감에 활용될 수 있을 것이다. Various river projects have caused sediment transport relate problems such as sediment yields, foundation damages of river facilities by riverbed degradation, siltation on reservoir and erosion in coast. To understand comprehensively these behaviors related on sediment erosion, transport and yields from inflows to outflows in river watershed, usually, the sediment budget analysis is used. This study propose a new sediment budget analysis method using both sediment transport models of the watershed runoff model and riverbed fluctuation model. To calibrate and validate the model, the method is applied in the Naeseong-cheon which typical alluvial river is one of the main tributaries of the Nakdong river and Yeong-ju dam is planned to be built. The results show that proposed sediment budget analysis method represents well sediment transports in the natural river watershed. Specifically, sediment loads calculated by the method is fit well to the measured sediment loads in the Naeseong-cheon watershed. The sediment budget analysis results show that the soil loss of 17,040,000 tons due to erosion in many parts of river bed is estimated in the Naeseong-cheon. The suggested method can be used for sediment budget analysis and sediment related disaster risk reduction in the natural streams.

RC 골조의 내진설계에서 보 모멘트의 수직방향 재분배

김대곤,Kim, Dae-Kon 한국공간구조학회 2011 한국공간구조학회지 Vol.11 No.1

중진 지역에 있는 RC 골조의 횡하중에 대한 설계에서 저층부에 있는 보와 기둥의 강도는 상층부의 강도보다 커야만 한다. 그러나 횡하중에 대한 보의 설계 모멘트를 골조의 수평방향뿐만 아니라 수직방향으로 재분배 시킬 수 있고 그 결과 모든 보의 강도를 같게 할 수 있다. 본 논문은 최대한 많은 층의 보 휨 강도를 동일하게 만들기 위한 수직방향 보 모멘트 재분배의 영향을 살펴보는데 있다. 2경간-6층 RC 골조를 수직방향 모멘트 재분배를 고려한 경우와 고려치 않은 경우로 각각 설계하고 이들의 내진성능을 정적 비선형 한계하중 해석법과 동적 비선형 시간이력 해석법을 이용하여 구하였다. 해석결과 수직방향으로 보의 모멘트를 재분배하면 재분배 한 크기만큼 증가된 연성도를 요구하지만, 이 추가적인 요구는 상세설계가 잘된 RC 부재의 연성도 능력보다 작다. For the lateral load resistance of a RC frame in a medium risk seismic zone, the strength of lower story beams and columns should be larger than those of the upper stories. However, the lateral loads can be accommodated by redistributing design beam moments vertically as well as horizontally so all beams end up with identical strengths. This paper looks at the impact of the vertical redistribution of beam moments to provide identical beam strength over as many floors as possible. Two-bay six-story RC frame was designed with and without vertical beam moment redistribution and its seismic performance were evaluated by using push-over limit analysis and by non-linear time history dynamic analysis. Analytical results show that with the use of vertical beam moment redistribution the increase in the ductility demand is similar to the proportion of moment redistribution applied, but this additional demand is below the ductility capacity of well detailed RC members.

1996년도 제35차 대한소화기학회 추계학술대회 / 일반연제 : 간 ; 간암세포주에서 Retinoic Acid 에 의한 인슐린양 성장인자 결합단백 - 1 또는 - 3 의 조절

김대곤,문성기,임철수,안득수,이대열,한영민 ( Dae Ghon Kim,Sung Ki Moon,Chul Soo Im,Deuk Soo Ahn,Dae Yeol Lee,Young Min Han ) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1

품종 및 성별에 따른 쇠고기의 지방산조성 비교

김대곤,성삼경,정근기,최창본 대구산업정보대학 1995 논문집 Vol.9 No.2

Dae Gon The study was conducted to investigate the effect of breed, sex on fatty acid compostition. Hanwoo and Holstein used, in the study were classified by sex. The results are summarized as follows ; Oleic acid and unsaturated fatty acids(UFA) percentages of total fatty acids in Hanwoo were higher than in Holstein, but palmitic acid and saturated fatty acids(SFA) were lower in Hanwoo. Oleic acid in steers of Hanwoo and Holstein tended to increase compared with bulls. Oleic acid in rib loin and top round were considerably higher in Hanwoo steers than in Holstein steers. In Hanwoosteers, oleic acid and UFA tended to increased while stearic acid and SFA decreased as marbling degree increased.