철도교량형식의 경간에 따른 형고 비교

이태규(Lee TaeGyu),김혜욱(Kim HyeUk) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

The type used mainly in present our country in the superstructure of the railway bridge including the high speed railway is classified by the box girder and the I-type girder, greatly. The box girder is mainly used by the high speed railway bridge, and the I-type girder is used mostly by general railway bridge style. In this study, according to current railway bridge design code, we execute design by the span length of each considered bridge form. Also we analyze the suitable girder height by the span length and calculate the construction costs. The comparative analysis of the structural efficiency is produced by the span length. From this study, it is exposed that the girder height by the span length is the biggest in box girder. Also it is evaluated that the construction costs of the box girder is higher than that of the I-type girder although there is a difference between more or less according to adopted construction method.

고온 하에서 기화열을 고려한 철근콘크리트 부재의 온도해석

이태규(Lee Taegyu) 대한토목학회 2009 대한토목학회논문집 A Vol.29 No.4A

고온으로 인하여 콘크리트 내부의 수분이 증발할 경우 주변의 온도를 흡수하는 기화열이 발생하게 된다. 이에 따라 콘크리트의 내부온도는 외부의 온도가 지속적으로 증가함에도 불구하고 증가율이 둔화되는 현상이 나타나게 된다. 본 논문은 콘크리트 부재의 고온 하에서의 기화열을 고려한 내부의 온도변화를 예측하고자 하는 것으로 부재 내부의 임의의 위치에서의 온도를 산정하기 위하여 유한요소방식을 적용하였다. 또한 콘크리트의 고온에서의 열적 특성치에 대해서도 모델식을 제시하였다. 이러한 해석기법의 정확성을 검증하기 위하여 여러 다른 연구자들에 의한 실험 데이터와 비교하였으며, 그 결과 기화열로 인하여 온도가 소실되는 현상을 포함한 전반적인 부재 내부의 온도분포 거동이 실제 실험데이터와 거의 유사하게 나타나는 것으로 확인되었다. When water inside the concrete member evaporates by high temperature, the evaporation heat which absorbs surrounding temperature occurs. The rate of increment of the internal temperature in concrete is reduced due to the evaporation heat in spite of continuously increasing external temperature. In this paper, the prediction method of internal temperature of concrete members considering the evaporation heat under the high temperature is presented. Finite element method is employed to facilitate thermal analysis for any position of member. And the thermal characteristics models of high strength concrete affected by high temperature are proposed. To demonstrate the validity of this numerical procedure, the prediction by the proposed algorithm is compared with the test results of other researchers. The proposed algorithm shows a good agreement with the experimental results including the phenomenon that temperature is lost by the evaporation heat.

I형 거더교의 동력분산형 하중에 대한 동적해석

이태규(Lee TaeGyu),김혜욱(Kim HyeUk) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7

This paper deals with the influence on the dynamic response of I-type girder railway bridge with high-speed electric multiple unit(HEMU) train load. This bridge system which has six I-girder and several cross beams, is modeled with plate and frame elements. And the upper slab is assumed to be fully connected with girders using rigid rinks. Span lengths, types of vehicle and running speeds are selected as parameters for analyses. For more exact analysis, it was adopted that 3-dimensional section of bridge models was produced by the assumed design wheel loads of HEMU vehicle at 200~350 ㎞/hr speeds. Dynamic vertical deflections, dynamic amplification factors and vertical accelerations of bridges having 30 and 35 m span length were investigated and compared with the limit values specified in various national railway bridge specifications.

항공사 직원의 혁신 행동과 학습 지향성이 직무성과에 미치는 영향

이태규 ( Taegyu Lee ) 관광경영학회 2021 관광경영연구 Vol.101 No.-

As airlines are based on human resources, securing and cultivating excellent human resources is important to airline performance. The purpose of this study is to verify how innovation behavior and learning orientation affect job performance for airline employees and to verify the mediating effect of knowledge sharing. A survey was conducted on employees of three domestic airlines. Innovation behavior and learning orientation had a direct effect on job performance and indirectly on knowledge sharing. Based on this, the following conclusions were drawn. First, the higher the innovation behavior of airline employees, the more active knowledge sharing is. The airline's open organizational culture is needed. Second, employees with high learning orientation are active in sharing knowledge. Airlines should have a culture that actively supports learning and encourages employees.Third, when knowledge sharing among airline employees increases, job performance improves. There is a need for a new education program for airlines and a process for knowledge fusion. Fourth, the mediating effect of knowledge sharing was practically verified in the influence of airline employees' innovation behavior and learning orientation on job performance.

국제법상 잠정적 보호조치에 대한 연구

이태규(Lee, TaeGyu) 한양법학회 2010 漢陽法學 Vol.32 No.-

Dealing with provisional measures of protection (=Interim measures) is considered to be one of the toughest job in the modern International Law areas, because it is in such a conflicting world between “values” and “facts”. Judicial decisions shall be meaningful and effective only when they are supported by actual compliance or enforcement. In this paper, several topics such as some definitions compared with domestic ones, relevant norms-Statute of the International Court of Justice and the Rules of Court-and a few selective historical cases are to be scrutinized throughly in order. And finally some controversial issues and legal implications upon this kind of interim measure in the International Law Arenas are come up with from a perspective of critically-oriented bases. For its developmental changes which would be possibly expected in the future, this article is hopefully to provide various and informative guidelines.

안정된 VLSI 시스템의 설계를 위한 짧은 경로 분석

이태규(Taegyu Lee),장훈(Hoon Chang) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.1

회로 설계에 있어서 클럭을 결정하고 타이밍 분석(timing analysis)을 하는 것은 아주 중요한 문제이다. 고성능 VLSI 시스템 설계에 있어서 시스템의 안정성을 보장하기 위해서는 클럭의 동기화에 따라 올바른 신호가 전파(propagate)되어져야 한다. 동기화 시스템에서 최적의 클럭 주기(clock period)는 최장 경로(longest path)와 최단 경로(shortest path)의 정확성에 크게 의존한다. 타이밍 제약조건(timing constraints)이 만족되고, 동기화 회로 내의 클럭 스큐(clock skew)가 해결되어야 회로의 정확한 동작을 보장할 수 있다. 본 논문에서는 최단 경로 상에서 증진된 타이밍 검증(timing verification)을 지원하도록, 조합회로 내에서 k개의 짧은 경로들(k-most short paths)을 찾아내는 효과적인 알고리즘을 제시한다. 제시된 알고리즘은 이미 접근한 짧은 경로의 시간지연(delay) 정보를 이용함으로써 새로운 경로에 접근하는데 있어 동일한 부분 경로들에 대한 불필요한 접근을 피하도록 구성된다. 그리고 여기서 열거된 짧은 경로들 상에 존재하는 시간지연 요소들의 시간지연을 줄임으로써 클럭 동작의 안정 범위를 확보한다. ISCAS 벤치마크 회로들을 사용한 실험 결과는 본 논문에서 제시한 알고리즘의 효율성을 입증한다.

창동, 상계 신경제중심지 프로젝트가 주변 도시공간의 보행통행량에 미치는 영향

이태규(Lee, Taegyu),최재필(Choi, Jaepil) 대한건축학회 2017 대한건축학회논문집 Vol.33 No.6

The purpose of this research was to figure out the influence of Changdong and Sanggye New Economic Center Project to its surrounding area by comparing results of spatial analysis through Space Syntax. To elaborate and predict the influences, researchers compared the results of Space Syntax analysis on pedestrian axial maps of Changdong and Sanggye region. The axial map results from before and after the project were analyzed. Represented changes of pedestrian volume were focused on integration(5) values. As a result, the changes of integration(5) values on main commercial streets of Nowon and Changdong subway station areas were analyzed to estimate the new economic center project.

세명대학교 건설방재연구실 : 물불을 가리지 않고 안전한 대한민국을 만들자

이태규(Taegyu Lee),김원창(Wonchang Kim) 한국콘크리트학회 2022 콘크리트학회지 Vol.34 No.1

고온조건에서 콘크리트 부재의 수분이동

이태규(Lee TaeGyu),김혜욱(Kim HyeUk) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월

Moisture evaporates, when concrete is exposed to fire, not only at concrete surface but also at inside the concrete to adjust the equilibrium and transfer properties of moisture. The equilibrium properties of moisture are described by means of water vapor sorption isotherms, which illustrate the hysteretical behavior of materials. In this paper, the prediction method of the moisture distribution inside the high strength concrete members under the high temperature is presented. Finite element method is employed to facilitate the moisture diffusion analysis for any position of member. And the moisture diffusivity model of high strength concrete by high temperature is proposed. To demonstrate the validity of this numerical procedure, the prediction by the proposed algorithm is compared with the test result of other researcher. The proposed algorithm shows a good agreement with the experimental results including the vaporization effect inside the concrete.

코호넨 신경회로망의 학습속도 개선

이태규(Taegyu Lee),이극(Geuk Lee) 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.2

본 논문에서는 Kohonen의 자기구성지도(Self-Organizing Feature Map)의 수렴도(convergence rate)를 향상 시킬 수 있는 방법을 제안한다. Kohonen의 신경망은 학습시 다수의 입력패턴을 필요로 하여 그에 따른 학습 시간 역시 증가하는 단점을 가지고 있다. 그러나 제안한 방법은 이웃관계(neighborhood relation)에 가우시안(Gaussian) 함수를 도입함에 있어 그 편차를 증가 시키고 폭을 학습횟수에 따라 감소 시켯으며 폭에 따른 신경망의 변화를 통하여 수렴도를 향상시켰다. 제안한 방법의 우수성을 해석적인 방법과 실험적인 방법으로 다른 연구과 비교 하였다.