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국부적 gamma-shift 영상 증식을 이용한 GAN기반 LDR 영상 변환 학습
정성운(Sung-Woon Jung),권혁주(Hyuk-Ju Kwon),김영춘(Young-Choon Kim),안상호(Sang-Ho Ahn),이성학(Sung-Hak Lee) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
The unpaired image-to-image translation showed potential of GAN(Generative Adversarial Network) in an image creation field. However when converting HDR(high dynamic range) tone mapping images, the directional results of converting domain images into HDR tone mapping images are distorted or slightly brighter. Therefore, we present method of LDR(low dynamic range) image transformation with Generative Adversarial Network based on the RW GAN. The proposed method is to extend the data tone level by gamma-shift. so, this paper modifies the weight loss function and RFT(regional fusion training) methods of the RW GAN. The local contrast of results is enhanced and the color preservation performance is better than conventional methods.
포스터 전시회 : 연료첨가제 주입 전,후 승용차의 규제물질 배출현황
정성운 ( Sungwoon Jung ),손지환 ( Jihwan Son ),홍희경 ( Heekyoung Hong ),성기재 ( Kijae Sung ),김정수 ( Jeongsoo Kim ),김정화 ( Jounghwa Kim ) 한국액체미립화학회 2015 한국액체미립화학회 학술강연회 논문집 Vol.2015 No.-
This study was designed to investigate characterization of regulated pollutants (CO, HC, NOx and PM) emitted from 134 diesel and gasoline passenger cars based on emission standards according to fuel additives. The experiments using chassis dynamometer were conducted under NEDC and CVS-75 modes. Comparison for fuel additive management and test between Korea, USA, EU and Japan, Korea was more strict than others. For with/without fuel additives according to diesel emission standards, NOx of EURO 4 and EURO 5 showed a relatively similar tendency. In the case of PM reduction rate, EURO 5 was over 20% decreased than EURO 4. In the case of standard deviation/average ratio for gasoline vehicles, variation interval was big for LEV 23.3 ~ 58% and ULEV 31.6 ~ 56.4%. Following the imposition of stricter regulations (EURO 5 and ULEV), difference rate for standard deviation was big. Especially, in the case of diesel vehicles, difference rate for NOx 68% and PM 48% was the biggest. The results of present study will contribute to set up emission standards for Korean fuel additives.
정성운(Sung-Woon Jung),권혁주(Hyuk-Ju Kwon),김영춘(Young-Choon Kim),안상호(Sang-Ho Ahn),이성학(Sung-Hak Lee) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.8
The GAN(generative adversarial network) learning-based image transformation can be used for conversion from day images to night images. However, in the case of converting from night images to day images, because the lost information in the night image is predicted and recreated, it exposes more problems than when converting day images into night images. In this paper, we proposed a method of converting day images into night images based on pix2pix. The proposed method reduces the number of hidden units in the pix2pix to solve the problem of gradient vanishing and adjusted the exposure value of the captured day image to create training data for the virtual night image. The experimental results show that the proposed method is superior to pix2pix and Cycle GAN in MOS(mean opinion score) and PSNR(Peak Signal-to-Noise Ratio).
정수슬러지를 재활용한 인공경량골재의 제조 및 비점오염원 여재의 적용
정성운 ( Sung-un Jung ),이승호 ( Seoung-ho Lee ),남궁현민 ( Hyun-min Namgung ) 산업진흥원 2021 산업진흥연구 Vol.6 No.4
본 연구는 정수슬러지의 활용을 위하여 경량골재를 제조하고, 그 물성을 확인하기 위하여 경량골재의 특성과 그 활용가능성을 확인하는 것이다. 경량골재 원료로써 특성을 알아보기 위하여 화학조성 및 열적 특성에 대하여 검토하였다. 급속소성법을 이용하여 골재를 소성하고 물성을 측정하였다. 정수슬러지는 높은 강열감량을 가지고 있었으며, 높은 내화도를 가지고 있었다. 정수슬러지를 30wt% 첨가하였을 때 1,150~1,200℃의 온도에서 경량화되는 것을 확인할 수 있었고, 1200℃이상의 온도에서 밀도 0.8이하의 초경량골재도 제조할 수 있었다. 일반골재를 대체하여 콘크리트에 적용 시 28일 강도가 200~600㎏f/㎠를 갖는 공시체를 얻을 수 있었으며, 여과재 시험 시 일반모래와 동등 이상의 성능을 나타냈다. The purpose of this study is to manufacture lightweight aggregates for recycling water treatment sludge, to identify the physical properties of the aggregates, and present a method of utilizing the manufactured lightweight aggregates. The chemical composition and thermal properties were examined via a raw materials analysis. The aggregate examined here was fired by the rapid sintering method and the single-particle density and water absorption rate were measured. Water treatment sludge has high ignition loss and high fire resistance. When 30wt% of purified sludge was added, the single-particle density of the aggregates was in the range of 0.8~1.2g/㎤ at a t emperature of 1,150 ~1,20 0℃. At temperatures of 1200℃ or higher, ultra-light aggregates having a single-particle density of 0.8 or less could be produced. When applied to concrete by replacing the general aggregate in the concrete, a specimen having strength values of 200 to 450 kgf/㎠ on 28 days was obtained, and when applied as a filter material, the performance was equal to or higher than that of ordinary sand.
연료첨가제 주입에 따른 승용차의 규제물질 배출특성 분석
정성운 ( Sung Woon Jung ),손지환 ( Ji Hwan Son ),홍희경 ( Hee Kyoung Hong ),성기재 ( Ki Jae Sung ),김정수 ( Jeong Soo Kim ),김정화 ( Joung Hwa Kim ) 한국분무공학회 2015 한국액체미립화학회지 Vol.20 No.4
This paper was designed to investigate emission characteristics of regulated pollutants (CO, HC, NOx and PM) from 134 diesel and gasoline passenger cars based on emission standards according to fuel additives. The experiments using chassis dynamometer were conducted under NEDC and CVS-75 modes. Comparison for fuel additive management and test between Korea, USA, EU and Japan, Korea was more strict than others. The fuel additives of this study was satisfied within fuel manufacturing standards. For with/without fuel additives according to diesel emission standards, NOx of EURO 4 and EURO 5 showed a relatively similar tendency. In the case of PM reduction rate, EURO 5 was over 20% increased than EURO 4.In the case of standard deviation/average ratio for gasoline vehicles, variation interval was big for LEV 23.3~58% and ULEV 31.6~56.4%. Following the imposition of stricter regulations (EURO 5 and ULEV), difference rate for standard deviation was big. Especially, in the case of diesel vehicles, difference rate for NOx 68% and PM 48% was most big. The results of present study will be of assistance in completing the legislative process and will provide basic data to set up emission standards for fuel additives in Korea.
근치적 자궁절제술을 시행받은 자궁경부암 환자의 임상적 고찰
정성운(Seong Un Jeong),조성중(Sung Joong Cho),김장환(Jang Hwan Kim),이남우(Nam Woo Lee),김경진(Kyung Jin Kim),박미혜(Mi Hae Park),황인택(In Tak Hwang),정지학(Ji Hak Jung) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8
목적: 근치적 자궁절제술을 시행 받은 자궁경부암환자의 임상적 고찰을 통해 수술 후 치료 성적을 분석해 보고자 한다. 연구방법: 1983년 1월부터 1992년 12월까지 을지 대학병원에서 광범위 근치적 자궁절제술을 시행 받은 자궁경부암 환자 중 추적관찰이 가능했던 162예를 대상으로 하였다. 결과: 나이 분포는 40대와 50대, 30대순이었고 환자의 임상 병기 분포는 Ia기가 12예(7.4%), Ib기가 84예(51.9%), IIa기가 39예(24.1%) 그리고 IIb기가 27예(16.7%)였다. 조직 병리학적 형태는 편평상피세포암이 91.9%, 선암이 4.9%, 선편평암이 3.1%이고 골반 임파절 전이 빈도는 I기가 22.9%, II기가 31.8%였으며 전체 임파절 전이 빈도는 26.4%였다. 광범위 근치적 자궁절제술 후 방사선 치료의 빈도는 I기가 63.5%, II기가 75.8%였다. 재발율은 7.4%였고 가장 흔히 재발되는 부위는 질교합부였다. 우리는 또한 환자의 5년 생존율을 평가했는데 그 결과는 Ia기는 100%, Ib기는 95.2%(4예), IIa는 87.2%(5예), IIb는 77.8%(6예)였다. 결론: 연령별 환자의 분포는 40대와 50대가 30.9%로 가장 높은 발생 빈도를 보였고 임상 병기별 분포는 Ib기가 51.9%로 가장 많은 빈도를 보였으며 병리 조직학적 분포는 편평 상피 세포암이 91.9%로 대다수를 보였고 전체 임파절 전이빈도는 26.4%였으며 가장 흔한 재발부위는 질교합부였다. 5년 생존율은 Ia기가 100%, Ib기가 95.2%, IIa기가 87.2%, IIb기가 77.8%였다. Objective: The purpose of this study was to analyze the clinical study for patients with cervical cancer who had undergone radical hysterectomy. Method: The subjects of this study were one hundred and sixty two patients with cervical cancer who had undergone radical hysterectomy at Eulji Medical College Hospital, Taejon, Korea, from January 1983 to December 1992. We reviewed the medical record retrospectively and analyzed the data. Result: The distribution of patients by age was found in the order of 50 decade and 60 decade, 40 decade. Those by the clinical stages were as follows: Stage Ia, 12 cases(7.4%); Stage Ib, 84 cases(51.9%); Stage IIa, 39 cases(24.1%); Stage IIb 27 cases(16.7%). The results of histopathologic type were distributed as follows: squamous cell carcinoma was 91.9%, adenocarcinoma was 4.9% and adenosquamous cell carcinoma was 3.1%. The histologic subtypes of squamous cell carcinoma(149 cases) were as follows: Large cell non-keratinizing type was 75.9%, large cell keratinizing type was 14.8% and small cell type was 1.2%. The frequancy of lymph node metastasis was 22.9% in stage I and 31.8% in stage II. The overall incidence of lymph node metastasis was 26.4%. The frequency of external radiation therapy done after radical hysterectomy was 63.5% in stage I and 75.8% in stage II. The 5-year survival rate was as follows: The Ia was 100%; Stage Ib, 95.2%(4cases); Stage IIa, 87.2%(5cases); Stage IIb, 77.8%(6cases). The incidence of recurrence was 7.4% and recurrent sites were vaginal stump , rectum and pelvic wall. Conclusion: The highest incidence of cervix cancer in age distribution was 50 decade(30.9%) and 60 decade(30.9%). The most common clinical stage was Ib(51.9%) and most frequent pathologic type was squamous cell carcinoma(91.9%). The overall incidence of lymph node metastasis was 26.4% and The most common site of recurrence was vaginal stump. The 5-year survival rate was 100% in the stage Ia, 95.2% in the stage Ib, 87.2% in the stage IIa, 77.8% in the stage IIb.