다중 실행 불가한 시뮬레이터 기반 지능형 에이전트를 위한 분산 학습 방법

이종화(Jong-Whoa Lee),최호진(Ho-Jin Choi) 한국정보과학회 2021 한국정보과학회 학술발표논문집 Vol.2021 No.6

행동 유사도 임베딩 기반 실시간 훈련원 행동 인식

이종화(Jong-Whoa Lee),심민호(Min-Ho Sim),최호진(Ho-Jin Choi) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.06

적외선 영상 기반 신경망 구조와 군집 분석을 이용한 고속 피플 카운팅

권현송 (Hyun-Song Kwon),이종화(Jong-Whoa Lee),구호근(Ho-Geun Koo),이범주(Buem-Joo Lee),김영국(Young-Kuk Kim) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

"People Counting" is one of the main research areas of object detection and counting algorithms. This algorithm uses various electronic sensors or image cameras to automatically count the number of people passing by. In this paper, high—speed people counting algorithm using neural network structure in infrared video is proposed. The advantage of this method is that it is fast and can also be trained with classification data which is easy to build dataset. The proposed algorithm is performed in the order of detecting pedestrians using neural network and cluster analysis. After that it analyzes the movements of the detected pedestrians and counting the number of in—out people. Furthermore, the corresponding algorithm showed 3.03 times faster processing speed than the YOLOv3—tiny model which is specialized in high—speed operation of object detection.

유해 중금속 함유 슬러지의 고화처리시 수분함량 및 시멘트함량이 미치는 영향

이종화,박종안,장봉기,손부순,허준무 순천향대학교 기초과학연구소 1998 순천향자연과학연구 논문집 Vol.4 No.1

The purpose of this study was to investigate the effect of mix ratio on the compressive strength and the hazardous heavy metal leachability from the solidified waste. The solidification process utilized in this study was cement-based technique since its performance was superior to other process techniques. The mix ratio applied in this study varied from 0.05 to 0.30 because higher mix ratio need to large amount of cement and landfill area to be occupied by solidified waste. Sludge obtained from a electroplating industry was used for the solidification process. Moisture contents of the sludge were 30% and 60 % of sludge to be solidified. The moisture content of 30% was selected as a relatively low moisture content while 60% of moisture was a typical one in the solidification field. Typical hazardous metal such as lead, copper, cadmium was selected for leachability test. the results of the study indicated that there could be exist optimum mix ratio to exhibit the maximum compressive strength of the solidified waste especially when low moisture content of sludge was solidified. The same trend was observed when water/cement ratio was applied instead of mix ratio. The optimum mix ratio and water/cement ratio for the 30% of moisture content of sludge were 0.1 and 3, respectively. As the compressive strength of the solidified wasters increased, the leachability of Cu, Pb, and Cd was decreased. Pb may be bound into the silica matrix rather than being in the pores, while Cu and Cd could be bound by physical isolation of concrete matrix.

아산시의 환경보전을 위한 수질(하천 및 호소)오염 실태조사 및 대책

이종화,박종안 순천향대학교 기초과학연구소 1996 순천향자연과학연구 논문집 Vol.2 No.1

The object of this study is to survey water quality of river and reservoirs in Asan city. We also suggest some alternatives for environmental preservation toward sustainable urban development of Asan city. This study analyzes water quality(pH, DO, BOD, COD, SS, Pb, Cd, T-P and T-N) of river and reservoirs. First, the level of water quality of Kodyke river is in the range of level Ⅱ-Ⅲ lower than the level Ⅲ established by the Ministry of Environment. Heavy metal pollution was not observed. Second, the level of water quality of small reservoirs is in the range of level Ⅳ-Ⅴ higher than the level Ⅲ established by the Ministry of Environment. Especially, water quality of Sinchang and Shinchung reservoir is worser than that of other reservoirs. Water quality of Asan and Sapkyo lakes is the range of level Ⅲ-Ⅴ. As the level of T-P and T-N is level Ⅳ and level Ⅴ, respectively, eutrophication might be progressed. Kogkyo river and reservoirs in Asan city is alreadlly very polluted by inflow of wastewater from residents, animal husbandries and industries. Recently, Metropolitan Area Development Planning(MADP) for Asan bay-area was suggested by the Ministry of Construction. According to this plan, industrialization and urbanization of Asan area will rapidly progress. If sewage and wastewater treatment facilities are not provided, water quality of river and reservoirs in Asan city will be worse. In order to prevent of environment pollution, first, the impact of industrialization and urbanization of Asan area on the environment should be considered at the beginning of MADP. Second, total effluent regulation of water pollution, air pollution and soil wastes, based on the self-purification of the Asan city environment, should be enforced.

대구지역 영세사업장의 작업환경 측정실태와 인식도

이성미,이종영,김두희,이종화,장봉기 순천향대학교 산업의학연구소 1996 순천향산업의학 Vol.2 No.1

This study was conducted to examine both actual status and understanding of the workshop environment of the small sized companies with 30 or less employees in and around Taegu city, Korea by analysing the questionnaire with 400 small sized manufacturing companies from the end of Mar. to the end of June 1993 according to their employee number and business type. The result of this study is summarized as follows. The job title of the respondents showed that the president accounted for 34.3% which was highest, particularly, which showed the highest percent in the companies with 5-9 employees. The management of workshop environment indicated that the response of 'Very Necessary' accounted for 52.0% which was higher. Thus it was shown that the owner and manager's understanding of the workshop environment was higher. However, the response of 'No Enough Money' for investment in improvement of workshop environment indicated that the president accounted for 51.1% which was also higher. 54.3% of all subjects considered their workshop environment as not good, while 66.5% answered that the workshop environment has effect on the health of employees. The actual status of industrial accidents occurred from January to December 1992 showed 18.7% frequency, while their business type was that the metal and machinery industries accounted for 24.8%. In addition, their size indicated that 16-29 employees accounted for 26.5% which was higher than that of other companies with different sizes. Regarding the question of understanding whether their workshop is the subject required for measuring the workshop environment, it was shown that the response of 'No Understanding' accounted for 57.0%. Based on their size, the companies with 5-9 employees accounted for 37.6%, while on their business types the metal and machinery industries accounted for 31.2% which showed the lowest understanding. In case of the companies understanding as the subject required for measurement of their workshop environment, the harmful element acting as a problem in their workshop indicated that the response of 'Too Noisy' accounted for 37.8%, and 'Too Serious Dust' for 11.8%, when the noise appeared as the most serious harmful element in all workshops. Among the companies required for measuring the workshop environment, it was shown that the workshops which did not carry out the required measurement accounted for 24.4%. Of the workshops which carried out the measurement required for their workshop environment, the frequency of annual two times accounted for 40.1% which was highest. Based on their size, it was shown that the companies with 16-29 employees accounted for 52.6% which was highest. The use of their measured data and execution of required improvement showed that the response of 'Good' was totally high. Also the keeping result of their measured list indicated that the response of 'Good' accounted for 72.3%. Based on the above result, the understanding of needs for control of workshop environment was high. However, the actual improvement of workshop environment was not so active as their understanding. Because the health of all employees is closely related to the harmful workshop environment and working conditions, it will be necessary for the government to support the improvement of workshop environment of these small sized companies with insufficient capability of investment, to suggest its direction and to continuously encourage and inspect their measurement of workshop environment.

아산시 호소들의 오염실태조사 및 그 대책

장봉기,이종화,박종범,민준호,박종안 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.2

The object of this study is to survey water quality of reservoirsin in Asan city. We also suggest some countmeasures for environmental preservation toward sustainable urban development of Asan city. We analyze water qualities (pH, DO, COD, SS, T-P, T-N and Chlorophyll-a) of reservoirs. The level of water quality of small reservoirs is in the range of level Ⅳ-Ⅴ higher than the level Ⅲ established by the Ministry of Environment. Especially, water quality of Sinchang, Youngin and Shinchung reservoirs is worser than that of other reservoirs. Water quality of Asan and Sapkyo lake is the range of level Ⅳ-Ⅴ. As the levels of T-P and T-N are level Ⅳ and level Ⅴ, respectively, eutrophication might be progressed. Reservoirs in Asan city were already serious polluted by inflow of wastewater from residents, animal husbandries and industries. Recently, Metropolitan Area Development Planning(MADP) for Asan bay-area was suggested by the Ministry of Construction. According to this plan, industrialization and urbanization of Asan area will rapidly progress. If sewage and wastewater treatment facilitiesare not provided, water quality of reservoirs in Asan city will be worse. In order to prevent of environment pollution, first, the impact of industrialization and urbanization of Asan area on the environment should be considered at the beginning of MADP. Second, total effluent regulation of water pollution, air pollution and soil wastes, based on the self-purification of the Asan city environment, should be enforced.

Perchlotoethylene 을 사용하는 세탁소 작업자들의 직업성 폭로와 건강에 관한 연구

박종안,안선희,이종화 한국산업위생학회 1994 한국산업보건학회지 Vol.4 No.2

In this study we examined several subjective symptoms in an exposed group and an unexposed group to perchloroethylene. The exposed group consists of 30 workers employed in 23 dry-cleaning establishments located in Chung Cheung Do, whereas the unexposed group consists of 42 officers employed in a certain university. This study was conducted from October, 1993 to March, 1994. Also we investigated personal exposure levels and area concentration of PCE, and performed hematological and biochemical examination in blood and urine samples from the exposed group. The results are : 1. The exposed group highly complains several subjective symptoms, particularly in neuropsychiatry, eye, respiratory system and digestive system, compared with the unexposed group. But complaint rates in the exposed group are not related with PCE exposure levels. 2. PCE exposure levels for all dry-cleaning establishment varied widely, from 0.18 to 37.58ppm. The mean exposure level for centers of chain was 16.85ppm, and for local laundries was 8.83ppm, while for self-service establishment it was 3.07ppm. Eighty three percent of the workers were exposed less than the half-level(25.0ppm) of the Korea 50.0ppm standard for eight-hour PCE exposure. Seventeen percent of them exceeded the half-level of the Korea TLV. 3. Statistical correlation exists between the work load(number of operation cycles of equipment and the mass of processed textiles) and the personal exposure levels to be observed. 4. In hematological examination the values of WBC, RBC, Hgb, Hct, MCV, MCH, MCHC and PLT in the exposed group were within normal ranges. In biochemical examination(GOT, GPT, ALP, U-A and LDH) most of the items were within normal ranges. From this surveys conducted on 23 dry-cleaning establishments, the complaint rates of the exposed group to PCE in several subjective symptoms were higher than those of the unexposed group, and PCE exposure levels in all dry-cleaning establishment were below the Korea standard 50.0ppm. In hematological and biochemical examination the significant abnormalities by occupational exposure to PCE were not observed. However, the workers employed in dry-cleaning establishments are always faced with risk, because they are also exposed to several organic solvents used to remove stains. Therefore, various measures to improve occupational environment in dry-cleaning establishment should be considered.