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슬러지 탄소원을 주입한 UNR공정의 동절기 질소, 인 처리효율
김영규,김인배,Kim Young Gyu,Kim In Bae 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.1
The aim of this study was to evaluate on the removal effect of total nitrogen and phosphorus with municipal wastewater in ultrasonic nutrient removal (UNR) process using ultrasonic sludge carbon source. The removal efficiency for total nitrogen was 44.2% at biological nutrient removal (BNR) process, 50.8% at UNR process. The removal efficiency for total phosphorus was 45.6% at BNR process, 46.2% at UNR process. The removal of nitrogen was effectively influenced by ultrasonic sludge carbon source.
철전기분해장치(FNR)에서 철판의 표면적이 인제거에 미친 영향에 관한 연구
김영규,Kim, Young-Gyu 한국환경보건학회 2012 한국환경보건학회지 Vol.38 No.6
Objectives: The purpose of this experiment is to understand the phosphorus removal ratio effects of iron plates per unit of surface area through the iron electrolysis system, which consists of an anoxic basin, aerobic basin, and iron precipitation apparatus. Methods: Iron electrolysis, which uses an iron precipitation reactor in anoxic and oxic basins, consisted of iron plates with total areas of 400 $cm^2$, 300 $cm^2$ and 200 $cm^2$ respectively. The FNR process was operated with a hydraulic retention time and a sludge retention time of 12 hours and three days, respectively. Wastewater used in the experiments was prepared by dissolving $KH_2PO_4$ in influent water. Results: The iron plates 400 $cm^2$ (16.6 $mA/cm^2$), 300 $cm^2$ (13.3 $mA/cm^2$) and 200 $cm^2$ (7.3 $mA/cm^2$) in surface area in the phosphorus reactor had respective phosphorus of 2.4 mg/l, 2.7 mg/l and 3.2 mg/l in the effluent and phosphorus removal respective efficiencies of 90.3%, 89.1% and 87.1%. The effluent in the reactor, where the iron plate was not used, had relatively very low phosphorus removal efficiency showing phosphorus concentration of 15.3 mg/l and a phosphorus removal efficiency about 38.3%. Phosphorus removal per ferrous was 0.472 mgP/mgFe in the iron electrolysis system where the surface area of iron was low. Phosphorus pollution load per active surface area and the phosphorus removal efficiency had an interrelation of RE = -0.27LS + 89.0 (r = 0.85). Conclusion: With larger iron plate surface area, the elution of iron concentration and phosphorus removal efficiency was higher. The removal efficiency of phosphorus has decreased by increasing the initial phosphate concentration in the iron electrodes. This shows a tendency of decreasing phosphorus removal efficiency because of decreasing of iron deposition as the phosphorus pollution load per active surface area increases.
ACTH와 Picrotoxin에 의(依)한 혈당(血糖)과 혈장(血漿) Corticosterone 치(値)의 변동(變動)에 미치는 Chlordiazepoxide의 영향(影響)
김영규,신만연,Kim, Young-Gyu,Shin, Man-Ryun 대한약리학회 1980 대한약리학잡지 Vol.16 No.2
Marc et al. reported that diazepam increased plasma corticosterone level and Dasgupta et al. suggested that chlordiazepoxide(CDP) supressed the adrenal response to ACTH. In this paper, the influence of CDP on the changes of blood sugar and plasma corticosterone level induced by ACTH and picrotoxin were investigated in male mice. The results obtained were summarized as follows; 1) The blood sugar and plasma corticosterone level were increased by CDP, ACTH, and picrotoxin, respectively. 2) The hyperglycemia induced by ACTH and picrotoxin were not affected by the CDP pretreatment. 3) The increase of plasma corticosterone level induced by ACTH was inhibited by the CDP pretreatment. 4) The increase of plasma corticosterone level appeared 30 minutes after picrotoxin injection was slightly enhanced, but the level of 120 minutes after picrotoxin injection was significantly inhibited by the CDP pretreatment.
김영규,정소연,Kim, Young-Gyu,Jeong, So-Yeon 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.1
This is a study to improve the evenness of distribution of bonding rolls used in fabric finishing process. Bonding rolls being produced domestically have uneven pressure distribution in longitudinal direction. The pressure at the both ends of rolls are greater than that at the center. So, to ensure the uniform pressure distribution, they manufacture silicon coating of rolls with tapered shape: so called crown. But, the silicon coating is needed to be machined periodically, since it is worn out during operation. Therefore to avoid additional machining of silicon coating, optimal roll structure has been sought to make uniform pressure distribution on the roll surface. Existing roll structure has been changed with new design. Design has been performed for existing three kind of the bonding roll through finite elements structure analysis. By using the design data a company has manufactured bonding rolls installed at a multi functional finishing machine.
미생물 코팅 담체를 이용한 하수의 질소$\cdot$인 제거에 관한 연구
김영규,조일형,Kim Young-Gyu,Cho Il-Hyoung 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.1
This study was carried out to investigate the removal of nitrogen and phosphorus in municipal sewage depending on existence of biological coated media in BCM reactor. The reactor with biological coated media is the process combining $A_2/O$ process. The removal efficiencies for $COD_{Mn},\; BOD_5,\;SS$, T-N and T-P were $78\%,\;90.5\%,\;92.3\%,\;61.9\%,\;60.2\%$, respectively. The specific nitrification rate$(mgNO_3-N/gMLSS{\cdot}d)$ of Contact aeration basin was 52.2 and the specific denitrification rate$(mgNO_3N/gMLSS{\cdot}d)$ in anoxic basin was 95.1. Also, phosphorus release$(mgPO_4-P/gMLSS{\cdot}d)$ in Anaerobic basin was 71.8 and Phosphorus uptake$(mgPO_4-P/gMLSS{\cdot}d)$ in contact aeration was 27.1.
도시철도차량 객실 혼잡 측정데이터 유효성 검증을 위한 모의테스트
김영규(Young Gyu Kim),김태도(Tae Do Kim),김영수(Young Su Kim),이석흥(Suk Heung Lee),정구인(Ku In Jung),김노중(No Joong Kim),오정애(Joung Ae Oh),신민창(Sin Min Chang) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.5
본 연구는 도시철도역사 이용 혼잡관리 기술개발의 전동차 객실 혼잡도 측정시스템, 혼잡도 제어장치와 혼잡도 측정장치 기술 개발과제로 전동차 객실 내 승객의 체감혼잡도를 낮추고자 전동차 객실 내부의 혼잡도 측정데이터를 상용 LTE망에 전송하여 유효성 및 신뢰성 검증을 위한 모의테스트에 대하여 기술하고자 한다. This study sends a congestion measurement data of the train room inside to lower the city railway history using congestion management technologic EMU rooms congestion measuring system, congestion control and congestion measurement experience congestion within the device Development Project Room passengers on a commercial LTE network and to describe the practice test for the validity and reliability test.
졸겔 스핀코팅 방법으로 제작된 ZnO 박막에서 Li 원자들이 물성에 미치는 영향
김영규 ( Young Gyu Kim ),박형길 ( Hyung Gil Park ),지익수 ( Ik Soo Ji ),김소아람 ( So A Ram Kim ),김종수 ( Jong Su Kim ),김진수 ( Jin Soo Kim ),김양수 ( Yang Soo Kim ),임재영 ( Jae Young Leem ) 대한금속재료학회(구 대한금속학회) 2014 대한금속·재료학회지 Vol.52 No.5
Undoped and Li-doped ZnO(LZO) thin films were grown on quartz substrates by a sol-gel spin- coating method. The effects of Li contents on the structural and optical properties of the ZnO thin flims were investigated by X-ray diffraction (XRD), photoluminescence (PL), and ultraviolet-visible spectrophotometer. In the XRD investigation, undoped and LZO thin films had a wurtzite structure and high c-axis orientation. The intensity and the full width at half maximum (FWHM) of the (002) peak for LZO was the largest and smallest at 2.5 at%, which indicate that the LZO thin film is the most crystalline at 2.5 at%. In the PL investigation, the near band edge emissions of the LZO thin films were blue-shifted and the FWHM of the LZO thin films decreased with increasing Li doping concentrations.
RPWM 기법을 이용한 능동클램프 ZVS 플라이백 컨버터 전도노이즈저감
김영규(Young-Gyu Kim),최태영(Tae-Young Choi),원충연(Chung-Yuen Won),김재문(Jae-Moon Kim),김규식(Gyu-Sik Kim),최세완(Se-Wan Choi) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
In the conventional PWM converter, high -frequency switching techniques was used for high-density of energy, but occurred a lot of problems such as switching losses, switching voltage/current stresses, EM](Electromgnetic Interference) and so on, To overcome these problems, various soft switching techniques have been presented, However these techniques are focused on reducing switching losses and voltage/current stresses<br/> The simulation and experimental results are shown that the active clamp ZVS flyback converter with the proposed RPWM(Random Pulse width Modulation) technque reduces the conducted noise.