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안전한 도시철도 환경을 위한 방치, 제거된 물체 검출 알고리듬의 구현
장일식(Chang Il-Sik),전지혜(Jeon Ji-Hye),박종화(Park Jong-Hwa),정철준(Jeong Cheol-Jun),안태기(An Tae-Ki),박구만(Park Goo-Man) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
In this paper, a detection system for the abandoned or removed objects is proposed and implemented using DSP-based embedded system for urban transit safety. To detect those objects, we proposed an object detection system using GMM(Gaussian mixture model) and image histogram in ROI(region of interest) on the input images. Our system is optimized for fast processing in embedded system. Experiments showed that the proposed system works with high accuracy in various environments.
데이터 시각화 기반의 UCI Sensor Data 분석
장일식(Chang, Il-Sik),최희조(Choi, Hee-jo),박구만(Park, Goo-man) 한국방송·미디어공학회 2020 한국방송공학회 학술발표대회 논문집 Vol.2020 No.11
대용량의 데이터를 시각적 요소를 활용하여 눈으로 볼 수 있도록 하는 데이터 시각화에 대한 관심이 꾸준히 증가하고 있다. 데이터 시각화는 데이터의 전처리를 거쳐 차원 축소를 하여 데이터의 분포를 시각적으로 확인할 수 있다. 공개된 데이터 셋은 캐글(kaggle), 아마존 AWS 데이터셋(Amazon AWS datasets), UC 얼바인 머신러닝 저장소(UC irvine machine learning repository)등 다양하다. 본 논문에서는 UCI의 화학 가스의 데이터셋을 이용하여 딥러닝을 이용하여 다양한 환경 및 조건에서의 학습을 통한 데이터분석 및 학습 결과가 좋을 경우와 그렇지 않을 경우의 마지막 레이어의 특징 벡터를 시각화하여 직관적인 결과를 확인 가능 하도록 하였다. 또한 다차원 입력 데이터를 시각화 함으로써 시각화 된 결과가 딥러닝의 학습결과와 연관이 있는지를 확인 한다.
범죄피해 이주여성 보호ㆍ지원 협의체의 유형별 문제점과 개선 방향
장일식 ( Chang Il-sik ),윤경희 ( Yun Gyeong-hui ) 한국경찰학회 2021 한국경찰학회보 Vol.23 No.1
Migrant women are exposed to various crimes due to their dual vulnerability as women and foreigners, but due to fear of investigation procedures and lack of information, they tend to be criminalized by bribery. In addition, the police provide unified services such as entering shelters, self-support, and self-reliance at the same time, along with initial measures and investigations by the police, but support within the actual system is limited. Therefore, when police find migrant women who are victims of crime, measures are requested to provide legal assistance as well as various crime damage support services to link effective welfare policies. Due to the necessity of such research, the purpose of this study is to analyze the operational status and problems of similar consultative bodies for the protection and support of crime victims and to present the most appropriate type as an integrated consultative . In order to achieve the objectives of these studies, a group in-depth interview(FGI) was conducted from 4 to 12 January. The subjects of this study are Type 1(Gumi-si, Gyeongsangbuk-do), Type 2(Danwon Police Station in Ansan), and Type 3(Gangdong Police Station in Seoul and Nambu Police Station in Ulsan). Looking at the problems of the type centered on local governments, it was suggested that the characteristics of local governments' consultative bodies were not compatible, and that there was a lack of prior consensus. Some said that the consultative is not appropriate to support a limited target of “crime victim migrant women” that the police want. According to the analysis of type 2(Ansan Danwon Police Station), which is centered on multicultural and migrant women's centers, problems such as budget shortages have made it difficult to hold meetings and it is often held for simple case sharing rather than discussing protection and support measures. According to the analysis of police-centered type 3(Seoul Gangdong Police Station, Ulsan Nambu Police Station), active communication between the consultative bodies was conducted, and it was evaluated to be operated according to the purpose of the pilot operation by sharing cases between institutions and discussing countermeasures. Based on this analysis of operational conditions and problems, preference analysis for each type of consultative was conducted through expert meetings, and police-led consultative bodies were found to be the best type.