隔板을 가진 水平環狀空間에서 自然對流에 관한 實驗的 硏究

鄭泰鉉,金善政,李範澈,權純錫 동아대학교 공과대학 부설 한국자원개발연구소 1988 硏究報告 Vol.12 No.2

Natural convection from a horizontal annulus with spacers has been studied on the effects of Rayleigh numbers and position of spacers by experimental method. In case of vertical spacers, the maximum local Nusselt number appears at θ=150° in a conducting tube and θ=30° in a cylinder. The local spacer Nusselt numbers show positive values on the lower spacer, but negative values on the upper spacer. In case of horizontal spacers, the flow over the spacer is more active than that of under the spacer as the Rayleigh number increase. The maximum local Nusselt number appears at θ=180° In a tube and at θ=0° in a cylinder. The local spacer Nusselt number show positive values on the upward surface of spacer, but negative values on the downward surface of spacer. The mean tube Nusselt numbers and mean cylinder Nusselt numbers with vertical spacer are increased 11% And 2.7%, respectively by those of horizontal spacer.

학교건물의 에너지성능 평가에 관한 연구

정만석,곽현철,석호태 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

Generally, Educational Buildings was selected a direction, plan and scale of building according to the figure of a site. However, In the result. The selection was spent more energy and made every effort to achieve the Thermal Comfort. In the Evaluation of Energy Performance, You must consider whether it will be worthwhile. In this study, we found a difference of Energy Consumption changes according to corridor style, direction, vertical and horizontal location, and roof-space by using DOE-2.1E energy simulation program. Based on this simulation results, found a probability of reducing energy consumption in educational buildings.

농촌인의 건강실태에 관한 연구

정동춘,정성태,장창현,전태원 師範大學 體育硏究所 1993 서울大學校 體育硏究所論集 Vol.14 No.2

The purpose of this study was to investigate the health condition of rural area adults. To accomplish this purpose 98 adults were drawn from 2 different rural areas such as Chungnam and Junbook, and their health condition were examined. The data from these people were compared with those of 108 Seoul residents. The main findings of this study were as followings; 1. Neuralgia was the commonest disease in rural area adults, followed by Rheumatism, waist pain, and heart problem. 2. About 62% of rural area adults indicated that their average sleeping time was less than 7 hours per day. 3. About 48% of rural area male adults indicated that their daily labor was generally “severe,”while 61.3% of female adults said in the same way. 4. The blood pressure value of rural area males was 124/73 ㎜Hg, while that of urban area males was 114/77 ㎜Hg. 5. The values of GOT and GPT were higher in rural area males than in rural area females. 6. the value of cholestrol was lower in rural area adults than in urban area adults.

환자, 가축 및 하천에서 분리한 Escherichia coli에 대한 약제내성과 전달성 R-Plasmid에 관한 연구

정규선,이연태,김현주 숙명여자대학교 약학연구소 1997 약학논문집-숙명여자대학교 Vol.13 No.-

These studies were made to assess the present stage of resistance to antibiotics, incidence and transferability of R- factors against E. colL From March to July 1987, 59 strains of E. coli were isolated from specimens of patients collected at university hospitals in Seoul, 64 Strains from stools of domestic animals and 66 strains from drainages in Seoul. These specimens were tested for resistance to 12 kinds of antimicrobial agents by means of the agar dilution method. Using Miiller- Hinton agar for the assay of drug resistance and tryptic soy broth as propagating medium for conjugation. E. coli were found to be resistant to one or more antibiotics, and were considered to be potential donor of R- plasmid. 1. Drug resistant strains of E. coli isolated from patients, domestic animals and drainages were amounted to 55(93.2%), 33(51.6%) and 31(47.0%), respectively. 2. Resistance to APTc, and Cb was the highest in those isolated from patients and drainages, and resistance to Tc, Cm and Sm was the highest in those isolated from domestic animals. 3. In the transfer test of drug resistance by conjugation method, 17 strains(47.2%) isolated from patients, 15 ones(53.6%) isolated from domestic animals and 15 ones(55.6%) isolated from drainages showed positive results, transperable resistant plasmid molecules with variable in each strain.

智異山 면양목장 조성에 관한 연구 : Ⅷ報. 智異山 山野草가 緬羊의 繁殖率에 미치는 영향과 羊毛의 加工利用方法, 販路方案, 貯藏法 및 緬羊團地造成時의 經濟性 分析 Ⅷ. Effect of the native herbages in Mt. Chiri on the breeding percentage of sheep and the processing method, way of marketing and storage of wool and economical analysis in the collective feeding of sheep

鄭鉉丞,姜奉泰,李炳五 진주산업대학교 1972 論文集 Vol.9 No.-

This is the report for 1971 of the third year project among the three years plan on the development of sheep range in Mt. Chiri. To investigate the effect of native grasses in Mt. Chiri on the breeding percentage of sheep this experiment was carried out from March 22, 1971 to March 21, 1972. Numbers of experimental animal used in this experiment were 12. Furthermore, the processing method of wool, marketing, economical analysis in the collective feeding and storage were investigated in cooperation with this experiment. The results obtained here were as follows; 1. For the processing method of wool, there are two ways; one of the processing method of wool is the self-processing method which follows the easy method of wool processing and another of the processing method of wool exchange with the good of wool texture company which follows the charge processing method of wool. 2. For the marketing route of wool, because the wool texture company can buy limitlessly wool, there are two ways to sell wool. The one of the way is the direct sell method of wool to the wool texture company and the other of the way is the sell method of wool via the route of circulation mechanism. 3. In the case of economical analysis for the collective feeding of sheep, if farms could raise 3,000 of sheep in the method of collective feeding it could get net income of 150,000 to 300,000 won for 52 days per farm per year. 4. For the storage of wool, to attach of wool fat must be needed and in the case of short period storage, wool must be placed in the arid place and in the case of long period storage, wool should be prevented from the attack of insect and rat, attachment of spurious article such as dust, decrease of weight and denaturation of wool fat. 5. The breeding percentage of sheep fed only native herbages plant was 60%.

CE cluster 척도에 의한 生産셀 設計

정현태 한국경영과학회 1992 韓國經營科學會誌 Vol.17 No.2

Manufacturing cell formation is one of the most important problems faced in designing cellular manufacturing systems. The purpose of this study is to design effective manufacturing cell system by developing a method which forms machines / parts into optimal machine cells / part families. The 0-1 data matrix structure is used to form a basis for manufacturing cell formation. In this paper, we propose a CE method to reorder the 0-1 data matrix for manufacturing cell formation. The resulting solutions are shown to demonstrate the effectiveness of the CE method.

암모니움, 아초산염과 칼슘 화합물이 고추 역병균(Phytophthora capsici)의 발아와 균사생장에 미치는 효과

장태현, 정봉구 忠北大學校 遺傳工學硏究所 1988 遺傳工學硏究 Vol.2 No.1

본문참고

Radiocobalt의 體內 汚染에 對한 除染效果

정인용,정현우,김태환,진수일,윤택구 대한방사선 방어학회 1988 방사선방어학회지 Vol.13 No.1

국내 原子力 産業의 施設增大로 放射線核種汚染의 가능성이 날로 증가되고 있음에도 불구하고 종사자 및 인근주민에 대한 診療對策에 관한 연구가 전무한 실정에 있어 이에 대한 기초자려마련의 일환인 應急處置方案을 수립코자 58CoCl2 1μCi를 마우스 (NIH-(GP))의 腹腔內에 投與한 후 CoNa3 DTPA 8.4mg/0.2ml saline, CoNa3 DTPA 8.4mg/0.2ml saline, saline 5ml등을 각각 投與하였으며, cobalt의 全身殘存量, 體內分布 및 尿內 含有된 量을 測定하기 위해 投與 後 4, 8, 12, 48시간, 그리고 7일에 MCA의 Ge-detector로 放射能을 計測하였고, 또한 각 實質臟器內 殘存된 cobalt의 放射能을 測定하기 위하여 각 group당 6마리의 마우스를 屠殺解體하여 測定하였던바 다음과 같은 결론을 얻었다. CoNa3 DTPA 處置群에서는 汚染된 放射性 cobalt의 全身殘存率의 減少 및 排泄率 增加에 유효한 效果가 있었으며, system contamination에 대한 방어효과는 CoNa3 DTPA, CoNa3 DTPA 그리고 saline 順으로 유효하였다. 결론적으로 본 실험결과로 볼 때 放射性 cobalt의 體內汚染에 대한 緊扱措置는 CoNa3 DTPA와 다량의 물을 동시에 投與함으로써 體內汚染된 放射性 cobalt의 排泄을 促進시킬 것으로 사료된다. In case of the acute intake of radionuclide, an early medical treatment may be necessary, but the little is established the procedures to decontaminate the victims of internal contamination in Korea. The purpose of the present investigation is to study chemical agents to remove radiocobalt from the victims and to provide a more reliable procedure for the treatment. The removals of radiocobalt from the NIH-(GP)mice injected intraperitoneally with lμCi of 58Co as CoCl2 were investigated with doses of either CaNa3 DTPA 8.4mg/0.2ml saline, CoNa3 DTPA 8.4mg/0.2ml saline, or saline 5ml. The radioactivity was determined by MCA and Ge-detector on 4, 8, 12, 48 hours and 7 days for the whole body, organ distribution and urine excretion. Six mice per each group were sacrificed for the measurement of cobalt retention in the parenchymal tissue. The cobalt trisodium chelate had a pronounced effect on reducing the whole body retention and increasing the excretion rate. Regarding to the systemic protective effects, CoNa3 DTPA, CaNa3 DTPA and saline were effected significantly in order. In conclusion, the extrapolations from these results to human were suggested that the rapid administration of cobalt trisodium chelate and an amount of saline to the contaminated person after internal contamination of radiocobalt were markedly increasing the decontamination effects.

^(155,156)Gd 동의원소의 keV 영역 중성자 포획단면적 측정

정원정,황정훈,김현,노태익 東亞大學校 2004 東亞論叢 Vol.41 No.-

The Neutron Capture Cross-Section of ^(155,156)Gd were measured in a neutron energy region from 15 to 85 keV using the 3MV Pelletron accelerator of Tokyo Institute of Technology. Pulsed neutrons were produced from the ^(7Li)(p,n)^(7)Be reaction. The incident neutron spectrum on a capture sample was measured by means of a TOF method with a ^(6)Li-glass detector. The capture γ-ray were detected with a large anti-Compton NaI(TI) spectrometer. A pulse-height weighting technique was applied to measured capture γ-ray pulse-height spectra to derive capture yields. The capture cross sections were obtained by using the standard capture cross-section of ^(197)Au. The present results are corrected for isotope impurities of sample because the samples contain various isotope Godolinium. The present results are compared with the previous measurements and the evaluated data of ENDF/B-VI.

측두골 골절에 의한 재발성 뇌막염 1례

정학현,고태옥,서한규,임현호,황순재 한국의학사 1998 診斷과治療 Vol.18 No.2