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정상준(Sang-Jun Jung),송재복(Jae-Bok Song) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
A robot needs a human detection algorithm for interaction with a human. This paper proposes a method that finds people using a SVM (support vector machine) classifier and a stereo camera. Feature vectors of SVM are extracted by HoG (histogram of gradient) within images. After training extracted vectors from the clustered images, the SVM algorithm creates a classifier for human detection. Each candidate for a human in the image is generated by clustering of depth information from a stereo camera and the candidate is evaluated by the classifier. When compared with the existing method of creating candidates for a human, clustering reduces computational time The experimental results demonstrate that the proposed approach can be executed in real time.
퍼지이론과 베이지안 갱신 기반의 과거 주행정보를 이용한 차량항법 장치의 교통상황 예측과 최적경로 계획
정상준(Sang-Jun Jung),허용관(Yong-Kwan Heo),조한무(Han-Moo Jo),김종진(Jong-Jin Kim),최슬기(Sul-Gi Choi) 한국컴퓨터정보학회 2009 韓國컴퓨터情報學會論文誌 Vol.14 No.11
경제가 성장함에 따라 자동차는 현대인의 생활에 많은 영향을 끼치고 있다. 차량항법장치는 운전자에게 목적지까지의 경로를 안내해 주기 때문에 많은 편의를 제공하고 있다. 그러나 개인의 차량 소유가 대중화됨에 따라 교통혼잡이 발생하지만 차량항법장치는 환경을 고려하지 않는 일방적인 경로를 계획한다. 기존의 차량항법장치는 시간대와 상관없이 출발지와 목적지만 같으면 항상 동일한 경로와 소요시간을 제공하는 한계를 가지고 있다. 본 논문에서는 누적된 과거의 주행정보를 퍼지이론과 베이지안 갱신에 적용하여 교통상황을 예측하고 경로 계획에 반영하는 방법을 제안한다. 퍼지 이론을 통해 과거 주행정보의 출발 시간대와 속도율로 분류하고 베이지안 갱신을 사용하여 각 시간대에서 벌어질 교통상황을 확률로 계산한다. 전자지도에서 출발지와 목적지를 포함한 타원관심영역을 설정하고 Dijkstra와 A* 알고리즘을 융합하여 교통상황을 고려한 최적의 경로를 계획한다. 제안한 알고리즘의 성능과 정확성은 계획된 경로를 실제 주행함으로써 예측된 소요시간과 실제 주행시간을 비교하여 검증하였다. The vehicles play a significant role in modern people's life as economy grows. The development of car navigation system(CNS) provides various convenience because it shows the driver where they are and how to get to the destination from the point of source. However, the existing map-based CNS does not consider any environments such as traffic congestion. Given the same starting point and destination, the system always provides the same route and the required time. This paper proposes a path planning method with traffic prediction by applying historical driving information to the Fuzzy theory and Bayesian update. Fuzzy theory classifies the historical driving information into groups of leaving time and speed rate, and the traffic condition of each time zone is calculated by Bayesian update. An ellipse area including starting and destination points is restricted in order to reduce the calculation time. The accuracy and practicality of the proposed scheme are verified by several experiments and comparisons with real navigation.
정상준(Jung, Sang-jun),박창배(Park, chang-Bae) 대한건축학회 2014 대한건축학회 학술발표대회 논문집 Vol.34 No.2
The purpose of this study is two-fold. The first purpose is to present valuation evaluation and related factors of the image of exterior form of art museum. The second purpose is to extract the qualifiable index and verify its effectiveness. To accomplish these purposes, this study investigated public preference in exterior design of art museum through a case analysis method. It was found that the analysis of the value of exterior design is very useful to understand the trend of preference in design in accordance with the current view of the public perception.
글리콜에테르계 혼화제를 사용한 콘크리트의 기초물성과 내구성능에 관한 실험적 연구
임상준(Lim Sang-Jun),김광기(Kim Kwang-Ki),백민수(Paik Min-Su),송인명(Song In-Myung),정재동(Jaung Jae-Dong),정상진(Jung Sang-Jin) 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.11
Focused on the material related aspect for enhancing the durability of concrete, the present study analyzed the effect of glycol ether admixture, which is a chemical admixture that can compact the structure of concrete by entraining air inside the concrete, on the basic physical properties and durability characteristic of the concrete. In analyzing the results of experiment, we examined the basic physical properties and durability characteristic of concrete according to addition rate based on OPC and selected the optimal addition rate. In addition, with the optimal addition rate, we added glycol ether admixture to concrete, which contained fly ash and fine blast furnace slag power used as binder and highperformance water reducing agent for reducing the unit quantity, and examined changes in the characteristics of the concrete. According to the result, the optimal addition rate of glycol ether admixture was3% of the unit quantity of cement, and the addition of binder and chemical admixture did not have a significant effect on unhardened concrete but reduced the air content. In addition, we found that the addition was effective for strength and resistance to carbonation and the change of length in hardened concrete, but improvement in resistance to freezing and thawing was relatively low because of the decrease of the air content.
김형렬,정상준,강준호,Hyung-Ryul Kim,Sang-Jun Jung,Jun-Ho Kang 한국암반공학회 2023 터널과지하공간 Vol.33 No.4
As the demand for urban underground space increases recently, urban tunnel planning is actively progressing. In the urban area, a underground station is planned in consideration of the living environment of residents, and 2-arch tunnel is applied for the stability of existing structures and reduction of environmental damage. However, since the depth of weak rock mass is deeply distributed in the urban area due to severe weathering, careful planning is required to secure tunnel stability. In addition, if TBM mechanical excavation is applied as the main tunnel excavation method considering the composite ground in urban area, the construction connectivity with the 2-arch tunnel of the NATM concept may be deteriorated. In this study, the design case of applying TBM pre-excavation type 2-arch tunnel for the first time in Korea was mainly described. The main considerations for the segment design of TBM pre-excavation type 2-arch tunnel were explained for side tunnels. Also, a stability analysis was conducted to verify the effectiveness and adequacy of the TBM pre-excavation type 2-arch tunnel.