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활성탄의 급여가 젖소 송아지의 성장 및 배설물의 Ammonia 함량에 미치는 영향
유선일,박덕섭,명윤아,이인덕,남명수,김용국 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.2
This study was carried out to investigate the influences of feed containing activated charcoal on the performances of calves The daily weight gain, feed intake, feed requirement and the content of ammonia in the excreta were measured. The experiment was conducted with 10 male calves for 30 days. Each were equally divided with treatment group and control group and for the treatment group's animal fed diets containing 1.0% activated charcoal. The daily weight gain of calves were decreased by 1.92% when they were fed activated charcoal(1.02㎏/day) compared to that of control calves(1.04㎏/day) and the daily feed intake of treatment group(2.86㎏/day) was 10.06% lower comparing to the control group(3.18㎏/day). In case of feed requirement, the result showed 8.2% lower in the treatment group(2.80㎏) than control group(3.06㎏). The content of ammonia in excreta was significantly lower for treatment group(0.33ppm) than control group (2.67ppm)(p<0.05), which showed more improvement for reducing ammonia content in the treatment group with 87.6%(p<0.05). 본 연구는 사료에 활성탄을 첨가했을 때 송아지의 일당 증체량, 사료 섭취량, 사료 요구율 및 배설물의 ammonia 함량에 미치는 영향을 규명하기위해 실시하였다. 홀스타인 수송아지 10두를 30일 동안 대조구, 시험구(활성탄 1%첨가)로 각5두 공시하여 시험하였으며, 실험 결과를 요약하면 다음과 같다. 송아지의 일당 증체량은 대조구(1.04kg/일)에 비하여 활성탄을 급여했을 때(l.02kg/일) 1.92% 감소하였고, 일당 사료 섭취량은 시험구(2.86kg/일)가 대조구(3.18kg/일)에 비해서 10.06% 낮았으나, 사료 요구율은 대조구(3.06kg/kg증체)에 비해 시험구(2.80kg/kg증체)에서 8.2% 낮은 결과를 나타내었다. 송아지 배설물의 ammonia 함량은 대조구의 2.67ppm에 비하여 시험구가 0.33ppm으로 87.6% 감소되는 개선효과를 보였다(p<0.05).
유동상 생물반응기에 의한 난분해성물질이 포함된 염색-제지 혼합폐수처리
김홍록,장일헌,서유덕,박영규 嶺南大學校 環境問題硏究所 1993 環境硏究 Vol.13 No.1
환경관리공단 대구사업소 폐수종말처리장으로 유입되는 염색-제지 혼합폐수를 대상으로 유동상 생물반응기로 담체충진율을 10%와 20%로 변화시키면서 처리한 결과, 담체충진율을 10%로 하여 BOD용적부하 1.52∼6.4㎏ BOD/㎥·day, COD용적부하 1.40∼4.81kg ??/㎥·day로 처리할 때 유출수의 평균 BOD는 216㎎/ℓ, 평균 ?? 농도는 241㎎/ℓ이었으며, BOD 및 ??의 평균제거율은 각각 73%, 65% 이었다. 담체를 20% 충진하여 BOD용적부하 1.8∼5.81㎏ BOD/㎥·day, COD용적부하 1.5∼4.85㎏ ??/㎥·day로 처리할 때 유출수의 평균BOD는 188㎎/ℓ, 평균 ?? 농도는 223㎎/ℓ이었으며, BOD 및 ??의 평균제거율은 각각 79%, 69%로 담체중진율 20%가 다소 높게 나타났다. 담체를 10% 충진한 경우 Y, ??는 각각 0.28(㎏ MLVSS/㎏ BOD)와 0.05(??)이었으며, 담체를 20% 충진한 경우의 Y, ?? 값은 0.30(㎏ MLVSS/㎏ BOD) 와 0.08(??)이었다. This study was performed to investigate the biological treatability and to determine the biokinetic coefficient by Fluidized Bio-reactor using 10% media and 20% media for dyeing and paper manufacture mixing wastewater of Taegu Namchun Sewage Treatment Plants. The dyeing and paper manufacture mixing wastewater contained BOD 601∼1.194mg/l and ??424∼812mg/ℓ was treated by Fluidized Bio-reactor. The conclusions are as follow : The 73% of BOD and 65% ?? were removed by Fluidized Bio-reactor using 10% media with the loading range of 0.5∼1.52kg BOD/kg MLVSS·day and 0.53∼1.24kg ??/kg MLVSS·day. The 79% of BOD and 69% ?? were removed by Fluidized Bio-reactor using 20% media with the loading range of 0.32∼0.8㎏ BOD/㎏MLVSS·day and 0.28∼0.66㎏ ??/㎏ MLVSS·day. The biomass yield coefficient(Y) and microbial decay coefficient(??) were shown as 0.28kg MLVSS/kg BOD and 0.05 ?? in using 10% media, and 0.30kg MLVSS/kg BOD and 0.08 ?? in using 20% media, respectively.
정영권,윤유상,서상욱,신동우,김창덕,김경래 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
The purpose of this study is to increase the operational efficiency of Tact Planning and Scheduling through effective labor control based on fairly reasonable creation of work area. The main result of the study are as follows: 1) Specific section of work area for electric work lead to no division of zone between internal residence area and bathroom. And designate the work area of each floor so that it would manage labor control effectively. 2) When it comes to equipment work. It set up work area according to "floor" taking account into more frequent unit work comparatively than floor work. The study recommends that. As a future research, eventually aims at establishment of integrated system of labor control Tact Planning and Scheduling by combining respectively divided system into one.
마이크로파 플라즈마 CVD 방법에 의한 다이아몬드 박막 형성
이개명,김덕수,이유성,고정대,강민성,이광만,최치규 濟州大學校 基礎科學硏究所 1998 基礎科學硏究 Vol.11 No.1
High quality diamond films of the silicon on diamond (SOD) structure are deposited using CH₄ and H₂ gas mixture in microwave plasma chemical vapor deposition (CVD), a SOD structure is fabricated using low pressure CVD polysilicon of diamond/Si(100) substrate. The crystalline structure of the diamond films which composed of {111} and {100} planes, were changed from octahedral one to cubo-octahedron one as the CH₄ ratios are increased. The high quality diamond films without amorphous carbon and non-diamond elements were deposited at the CH₄ flow rate ratio of 1.5%, and the main phase of the diamond films shows (111) plane. The poly-Si/Diamond /SiC/Si(100) structure shows that the interface is flat without voids.
천장마감재를 겸한 슬래브 거푸집공법의 효용성 향상 방안
이형수,윤유상,서상욱,김창덕 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
The purpose of this study is to present an improved the construction method of slab form combined with ceiling finish. The current integration construction method has some waste factors ; unnecessary process, rework, time & cost waste. Therefore the study applied the value stream analysis methodology for efficient improvement of current process. The main contents of the study are as follows ; 1) Waste factors of current process were analyzed through current state mapping(CSM). 2) An improved process was suggested through future state mapping(FSM). 3) Cost reduction effect by process improvement was also analyzed. The study recommends that development of technique to eliminate waste factors and application of the construction method of slab form combined with ceiling finish should be increased.
A New Frequency Controlled Half-bridge Converter with Hold-up Time Extension Circuit
Duk-You Kim,Jae-Kuk Kim,Woo-Jin Lee,Gun-Woo Moon 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
Hold-up time is a special requirement for the front end DC/DC converter in a server power supply. It forces the converter with the variable switching frequency to operate in a wide switching frequency range, which makes the regulation difficult and reduces the power density. In this paper a novel frequency controlled half bridge converter with the hold-up time extension circuit is proposed. During the hold-up time, the auxiliary switches are turned on, thus the resonant inductance is reduced and the voltage conversion ratio is increased. Therefore, the output capacitor of the power factor correction (PFC) circuit can be decreased, and the converter can have high power density. The proposed converter is verified by experimental results from a prototype with 700W, 400V input, and 12V output.
Breeding of new silkworm variety, 'Chilseongjam' with peculiar laval mark
Kim, Seong-Wan,Kim, Kee-Young,Kim, Seong-Ryul,Kim, Su-Bae,Ji, Sang-Duk,Kim, Nam-Suk,Kweon, Hae-Yong,Jo, You-Young,Kim, Jong-Gil Korean Society of Sericultural Science 2018 International Journal of Industrial Entomology Vol.37 No.2
A new silkworm variety 'Chilseongjam' was bred for special purpose as educational learning and festivals. Their breeding history and major characteristics are as follows. The Chilseongjam variety was selected and succeeded from the F1 of Galwon ${\times}$ C721 in 2009 autumn. They are showing 94% (spring & autumn) of high practical hatching ratio. The larval period of Chilseongjam (spring: 23 d, autumn: 24 d 3 h) was shorter than that of Daebakjam (spring: 24 d, autumn: 25 d 23 h). In the pupation percentage, Chilseongjam (spring: 96.6%, autumn: 86.1%) is similar to Daebakjam Daebakjam (spring: 96.3%) in spring, but autumn is lower than Daebakjam (autumn: 94.9%). Single cocoon weight (spring: 1.57 g, autumn: 1.29 g) and Cocoon yield (spring: 14.2 kg, autumn: 11.1 kg) were lower than those of Daebakjam (spring: 2.76 g, 25.4 kg, autumn: 2.19g, 20.2 kg), respectively. The new silkworm variety, Chilseongjam showed higher pupation rate than control variety. This variety can be used as a educational learning and festivals.
Cytomegalovirus infection in patients with new onset ulcerative colitis: a prospective study.
Kim, You Sun,Kim, Young-Ho,Kim, Joo Sung,Cheon, Jae Hee,Ye, Byong Duk,Jung, Sung-Ae,Park, Young Sook,Choi, Chang Hwan,Jang, Byung Ik,Han, Dong Soo,Yang, Suk-Kyun,Kim, Won Ho G. Thieme 2012 Hepato-gastroenterology Vol.59 No.116
<P>Immunosuppressive therapy in ulcerative colitis (UC) may induce cytomegalovirus (CMV) infection or reactivation in the colonic mucosa and in turn exacerbate UC. However, it is unclear whether colonic inflammation itself affects CMV infection in UC. This prospective study evaluated the prevalence and clinical outcome of CMV infection in patients with new onset UC who have not been exposed to UC medication.</P>
( You Sun Kim ),( Young Ho Kim ),( Joo Sung Kim ),( Seong Yeon Jeong ),( Soo Jeong Park ),( Jae Hee Cheon ),( Byong Duk Ye ),( Sung Ae Jung ),( Young Sook Park ),( Chang Hwan Choi ),( Kyeung Ok Kim ) 대한소화기학회 2014 Gut and Liver Vol.8 No.6
Background/Aims: Cytomegalovirus (CMV) reactivations are frequently observed in patients with active ulcerative colitis (UC), and ganciclovir therapy is effective in patients with steroid-refractory UC. This study aimed to determine the longterm outcomes of CMV reactivation and the long-term therapeutic efficacy of ganciclovir treatment. Methods: This retrospective multicenter study included a cohort of 72 patients with moderate-to-severe UC who were evaluated for CMV reactivation at the time of their initial UC flare. Colectomy, disease relapse, and the recurrence rate of CMV reactivation were investigated. Results: The mean duration of follow-up for the 72 patients was 43.16±19.78 months (range, 1 to 67 months). The cumulative colectomy (log-rank, p=0.025) and disease flare-up rates (log-rank, p=0.048) were significantly higher in the CMV-positive group. Of the 11 patients who were successfully treated with ganciclovir in the initial treatment, three patients (27.3%) experienced CMV reactivation, and six patients (54.5%) experienced poor outcomes, such as the need for colectomy or a steroid-dependent state. Conclusions: The patients who had CMV-reactivated UC showed poor outcomes at the long-term follow-up, and the long-term efficacy of ganciclovir therapy was marginal. Careful assessment is necessary for patients who exhibit evidence of CMV reactivation. (Gut Liver 2014;8:643-647)