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강현우,Kang, Hyun-Woo 한국정보처리학회 2009 정보처리학회논문지B Vol.16 No.2
본 연구에서는 GMM 기반의 음성/음악 판별 방법을 응용하여 FM 라디오 방송에서 순수한 음악 구간만을 판별하는 시스템을 구현하였다. 본 시스템에서는 음성, 음악, 광고 음악, 기타 여러 가지 사운드가 혼합되어 있는 오디오 방송 프로그램에서 순수한 음악만을 판별하여 자동으로 저장하고자 한다. 음악의 시작 부분과 끝 부분을 보다 정교하게 검출하고자 순수한 음악으로 판별된 구간의 시작 부분과 끝 부분에 대해 후처리 과정을 추가하였다. PC 환경에서 FM 라디오 방송을 이용하여 구현된 시스템을 실시간으로 테스트한 결과 우수한 성능을 보임을 확인하였다. 또한 SoC 구현을 고려하여 고정소수점 연산을 수행한 결과 3MIPS 이하의 적은 연산량으로 부동소수점 연산일 때와 동일한 결과를 얻을수 있었다. This paper proposes a Gaussian mixture model(GMM)-based music discrimination system for FM broadcasting. The objective of the system is automatically archiving music signals from audio broadcasting programs that are normally mixed with human voices, music songs, commercial musics, and other sounds. To improve the system performance, make it more robust and to accurately cut the starting/ending-point of the recording, we also added a post-processing module. Experimental results on various input signals of FM radio programs under PC environments show excellent performance of the proposed system. The fixed-point simulation shows the same results under 3MIPS computational power.
텍스트 마이닝 기법을 활용한 젠트리피케이션 속도의 변화분석 연구 - 익선동 젠트리피케이션 현상을 중심으로
강현우,이희정 한국도시부동산학회(구 도시정책학회) 2018 도시정책학회 학술대회 Vol.2018 No.11
Located in the core area of Jongno, Iksun-dong is a city-style hanok area, which has recently been transformed into a homey hanok atmosphere through cafes and other forms of hanok reconstruction. In particular, the Iksung-dong Gentrification phenomenon shows the typical characteristics of gentrification occurred in Seoul recently. The characteristic of this is that the space for the local residents is a space for outsiders, There is a difference from the reservation, There are also cases where missed times for policy responses are appropriate. In order to regulate the rate of change of the place-sex change process, it is necessary to analyze the factor affecting the speed according to the timing of the gentrification, and to discuss the policy to properly protect and win the neighborhood store. In this research, for finding speed of gentrification, using text-mining analysis which is a method of big data
서울전파천문대(SRAO) 6M 망원경의 ON-THE-FLY 관측 시스템 구축
강현우,변도영,박용선,Kang, Hyun-Woo,Byun, Do-Young,Park, Yong-Sun 한국천문학회 2005 天文學論叢 Vol.20 No.1
On-The-Fly (OTF) observation method is developed for the efficient use of 6 M radio telescope at Seoul Radio Astronomy Observatory (SRAO). This technique, in which data and information of antenna position are recorded synchronously while driving a telescope regularly and rapidly across a field, provides more efficient use of telescope time and better calibration of the acquired data than the traditional point-to-point observation method does. For the realization of the method, we (1) added RT-Linux modules to the existing operating system, (2) replaced digital voltmeter with voltage-to-frequency converter, and (3) modified many SRAO observation programs. By observing Moon and G78.2+2.7 using this method and comparing them with previous observations, we verify the successful operation and efficiency of the OTF observation mode.
텍스트 마이닝(Text-mining)기법을 활용한 젠트리피케이션 (Gentrification) 현상의 속도 분석 연구 -종로구 익선동 젠트리피케이션 현상을 중심으로
강현우,이희정 한국도시부동산학회 2018 도시부동산연구 Vol.9 No.3
Ik-seon dong is one of the hot place in Seoul especially in these days. This means lots of money and people have been gathering in Ik-seon dong, gentrification was resulted in here. This showed Seoul’s these day’s gentrification, Too fast. Actually Seoul wanted to make detailed design plan in Ik-seon dong, but because of rapid speed, it was really hard work. As a result the plan was made in 2018, but the gentrification of Ik-seon dong give lots of information. In this situation, for analysing the gentrification, proper information, such as land use, the number of visitors, would be needed. However it is really difficult work because there isn’t data base about that. Text-mining is a analysis method using social network, so in this research, there are proper opportunity to reveal Ik-seon dong’s Gentrification.
Upper Gastrointestinal Stent Insertion in Malignant and Benign Disorders
강현우,김상균 대한소화기내시경학회 2015 Clinical Endoscopy Vol.48 No.3
Upper gastrointestinal (GI) stents are increasingly being used to manage upper GI obstructions. Initially developed for palliative treatment of esophageal cancer, upper GI stents now play an emerging role in benign strictures of the upper GI tract. Because recurrent obstruction and stent-related complications are common, new modifications of stents have been implemented. Self-expandable metal stents (SEMS) have replaced older plastic stents. In addition, newly designed SEMS have been developed to prevent complications. This review provides an overview of the various types, indications, methods, complications, and clinical outcomes of upper GI stents in a number of malignant and benign disorders dividing the esophagus and gastroduodenum.