• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.715-720
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• 2002

The dynamic load effects, generated by moving trains, are transferred to the railway bridges through tracks. The dynamic load effects may vary due to the dynamic characteristics of the applied vehicle loads and the railway bridges including the track system. However, the track models have been neglected or simplified by spring elements in the most studies since it is quite complicated to consider the track systems in the dynamic analysis models of railway bridges. In this study track system on railway bridges are modeled using a three-dimensional discrete-support model that can simulate the load carrying behavior of tracks. A 40m simply supported prestressed concrete box-girder system adopted for high-speed railway bridges are modeled for simulation works. The train models are composed of 20 cars for KTX. The dynamic response of railway bridges are found to be affected depending on whether the track model is considered for not. The influencing rate depends on the traveling speed and different wheel-axle distance. The dynamic bridge response decreases remarkably by the track systems around the resonant frequency. Therefore, the resonance effect can be reduced by modifying the track properties in the railway bridge, especially for KTX trains.

• 한국산업융합학회 논문집
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• 제24권5호
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• pp.547-553
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• 2021

Dynamic object recognition is an important task for autonomous vehicles. Since dynamic objects exhibit a higher collision risk than static objects, our own trajectories should be planned to match the future state of moving elements in the scene. Time information such as optical flow can be used to recognize movement. Existing optical flow calculations are based only on camera sensors and are prone to misunderstanding in low light conditions. In this regard, to improve recognition performance in low-light environments, we applied a normalization filter and a correction function for Gamma Value to the input images. The low light quality improvement algorithm can be applied to confirm the more accurate detection of Object's Bounding Box for the vehicle. It was confirmed that there is an important in object recognition through image prepocessing and deep learning using YOLO.

• 한국산학기술학회논문지
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• 제8권4호
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• pp.788-794
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• 2007

미 국방성의 정책은 NCW 개념 구현으로 방향을 이동하고 있다. NCW는 일반적으로 4개의 즉, 지휘통제, 센서 시스템, 교전시스템, 네트워크와 같은 핵심적인 상호종속적인 요소들의 통합과 동기화로 설명할 수 있다. 그러므로 한국군의 군사정책은 적용 가능한 NCW 통신환경 및 암호통신 정책에 대한 접근과 연구가 필요하다. 본 연구에서는 미국을 중심으로 추진되는 네트워크 중심 전쟁에서 보안 프레임워크를 살펴보았다. 네트워크 중심전쟁에서 고려되는 핵심 기술을 소개하였으며 이 핵심 기술인 보안 요구조건, GIG, JTRS, NCES, TCS의 보안 특성과 같은 보안 프레임워크를 고찰하고 NCW 환경에서 노드간 암호통신 중계영향을 분석하였다. 본 결과는 NCW의 다양한 암호통신 연구분야에서 환경적인 영향 요소들을 고찰하는데 도움을 제공한다.

• 한국통신학회논문지
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• 제34권9B호
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• pp.857-866
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• 2009

최근의 네트워크 진화 방향은 All-IP 기반의 유무선 통합을 실현하기 위하여 인프라의 공통요소인 IP 기반의 이동성에 대한 연구가 진행되고 있다. 기존의 진행되어진 대표적인 IP 기반의 이동성 기술은 IETF(Internet Engineering Task Force)의 Mobile IP(Mobile Internet Protocol)이다. 하지만 Mobile IP를 제공하기 위하여 기존의 네트워크 인프라 즉, 라우터들(FA:Foreign Agent)에게 기능을 추가 변경하여야 하는 문제와 MN(Mobile Node)이 이동할 경우 패킷 손실 문제, 지연 시간 발생 부분을 해결하기에는 한계가 발생하였다. 주 논문에서는 기존의 IP 기반의 이동성 방식이 가지고 있던 문제점들을 개선하여 IP 기반의 이동성, 품질, 보안성을 제공하는 플랫폼 구조를 제시하였다. 기존 IP 기반의 이동성 방식과의 패킷 손실 및 지연 시간에 대한 시뮬레이션 분석을 통하여 성능이 개선되었음을 보여주고 있다.

• 경영과정보연구
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• 제29권4호
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• pp.305-332
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• 2010

본 연구는 산림 건강치유, 요가, 휘트니스 등 총 세 가지의 건강관리 서비스 산업 비교를 중심으로 고객만족에 영향을 미치는 요인들을 찾고, 그로인한 어느 요인이 각 서비스 산업에서 고객만족에 많은 영향을 미치는가를 실증적으로 분석하여 검정하고자 하였다. 이에 기존의 SERVQUAL 척도를 중심으로 분석된 연구들과 또한 고객만족에 관한 측정지표 등을 사용하여 분석된 연구들을 바탕으로 프로그램, 물리적 환경, 직원의 서비스 지향성 등 3개의 요인을 도출하여 각 서비스 산업별로 다중회귀분석을 실시하였다. 분석결과, 산림 건강치유에서는 물리적 환경이, 요가에서는 프로그램이, 휘트니스에서는 직원의 서비스 지향성이 가장 많은 영향을 미치는 것으로 나타났다. 따라서 각 건강관리 서비스 산업은 고객들의 라이프스타일과 트렌드에 최우선적으로 역점을 두고 운영이 되어야 하며, 그에 따른 특성화 서비스를 제공해야 할 것으로 보여진다. 물론, 경쟁력을 갖추기 위해선 현대화된 운동장비와 차별화된 프로그램, 쾌적하고 고급화된 시설 마련은 기본이 되어야 한다. 더불어 현 시점은 건강과 운동에 대한 고객들의 관심이 양적 추구에서 질적 추구로 바뀌어가고 있다는 것도 직시해야 한다. 그 의미는 운동을 단순히 신체적 가치나 정서적 가치 추구에만 머물지 않고 교제나 유대를 위한 사회적 가치 추구에까지 미치도록 서비스를 변화시켜야 한다는 것이다. 이를 위해선 고객들 간의 유대관계를 위한 부가적인 프로그램 도입과 친근한 분위기, 적절한 동선체계도 함께 강구해야 할 필요성을 시사한다.

• 한국농촌건축학회논문집
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• 제19권2호
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• pp.25-33
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• 2017

This study aims to find out the change trend of the existing vacant houses in the small and medium sized farming city. And the using method of those houses is proposed in this paper. Especially to find out the change trend ratio of vacant houses in the case, the historic conservation area - Keumma village is selected as the research target area. To carry out this study, it was surveyed in 2013 when they were not designated as the special area first. And it is reviewed in 2017 when it is designated. The contents of the survey were their use, old age, structure, materials, color, roof of the main building and wall. they were surveyed by direct and interview survey. And thew were analyzed and synthesized. It is concluded that the 142 vacant houses in 2013 were declined 46houses in 2017. It is caused by the government support. And they will be declined continuously. The architectural statues of vacant houses between in 2013 and in 2017 are almost same in it's use, old age, structure, materials, color, roof of the main building and wall. In the use ratio of the vacant houses that of residence is most high, and that of warehouses, commerce are followed in turn. The reason of that statues is moving out is the first and the death of house holder, the difficulty of managing are followed. As the their re-use plan of owners, the selling is the first, constructing new buildings and the renovation them are followed. As the method of their use, re-use, community facilities, managing in the vacant houses bank are proposed. As the vacant houses are the reason of bad elements in the rural landscape in the farm village, the method of its improvement will be carried out.

• International Journal of Advanced Culture Technology
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• 제10권1호
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• pp.248-252
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• 2022

The environment refers to what is surrounded by something during human life. This environment is related to the way humans live, and presents various problems on how to perceive the surrounding environment and how the behaviors that constitute the environment support the elements necessary for human life. Humans have an interest in the supportability of the environment as the interrelationship increases as humans perceive and understand the environment and accept the factors supported by the environment. In space, human movement starts from one space to the next and exchanges stimuli and reactions with the environment until reaching a target point. These human movements start with subjective judgment and during gait movement, the spatial environment surrounding humans becomes a collection of information necessary for humans and gives stimulation. will do. In this process, in particular, humans move along the movement path through movement in space and go through displacement perception and psychological changes, and recognize a series of spatial continuity. An image of thinking is formed[1]. In this process, spatial experience is perceived through the process of filtering by the senses in the real space, and the result of cognition is added through the process of subjective change accompanied by memory and knowledge, resulting in human movement. As such, the spatial search behavior begins with a series of perceptual and cognitive behaviors that arise in the process of human beings trying to read meaning from objects in the environment. Here, cognition includes the psychological process of sorting out and judging what the information is in the process of reading the meaning of the external environment, conditions, and material composition, and perception is the process of accepting information as the first step. It can be said to be the cognitive ability to read the meaning of the environment given to humans. Therefore, if we can grasp the perception of space while moving and human behavior as a response to perception, it will be possible to predict how to grasp it from a human point of view in a space that does not exist. Modern people have the theme of reminiscing dog-friendly hotels for the healing of petloss syndrome, and this thesis attempts to approach the life of companions.