마늘의 珠芽를 利用한 優良種球生産

徐永培,金大圭,孫再根 경북대학교 농업과학기술연구소 1999 慶北大農學誌 Vol.17 No.-

This study was carried out to determine the promising method for the production of mother bulbs using garlic bulbil at the experimental field of Ange high school, Eusung in Korea from 1996 to 1998. The bulbs and bulbils were taken from a local cultivar 'Eusung' garlic. The growth of bulbil and yield potential were compared with different harvesting times and cultivation methods of bulbil. The harvesting time of bulbils which were capable of producing the mother bulbs was ranged from 15 days to 30 days after the emergence of flower stalks. The best results based on the yield and number of bulbs were obtained from the bulbils sampled at the just before garlic harvesting, 30 days after flower-stalk emergence. The mulching with transparent polyethylene(PE) film in bulbil cultivation was more effective for the plant growth and bulb formation than that with black PE film. The PE mulching from 30 days after seeding of bulbils to 30 days (late-April) before bulb harvesting was the most effective for the increase of bulb yield. In the cultivation of garlic bulbils, application of lime (150kg/10a) and compost (3,000 kg/10a) without any chemical fertilizers produced more bulbs in comparison with the standard level of fertilizer (N - P2O5 - K2O - compost -lime = 24.8 - 8.0 - 19.2 -3,000 - 150 kg/10a). It was determined that the involucre seeding and assemble seeding of bulbils was effective and labour-saving methods for the production of mother bulbs from garlic bulbils. Input of labour force for the involucre seeding was decreased up to 61% as compared with the conventional drill seeding of bulbils. Mean yield from the cultivation of bulbil-derived single cloves was remarkably increased up to 95% in comparison with that of the common cloves. The larger size of single clove produced more yields, and the optimum planting density of single clove was 20×10cm. The cloves differentiated directly from bulbil showed to have higher yield potential than that from common cloves.

치과용 도재분말의 제조 및 물리적 성질

염근창,고대진,장감용,이서영,김경남 大韓齒科器材學會 1994 대한치과재료학회지 Vol.21 No.1

In this study, the prepared glasses were heat-treated to precipitate the leucite crystal in order to control the thermal expansion coefficient which is an important property of dental porcelain powder. The effect of addition of Li₂O and Na₂O on the amount of the precipitated leucite crystal were also examined. The mixing ratio of the leucite-containing glass must be controlled to match the thermal expansion coefficient of dental porcelain to that of metal. The physical properties of the dental porcelain powder prepared in this study were characterized. The results of this study were obtained as follows : 1. Conditions for the preparation of the maximum amount of leuctie crystal were compostion L-2(2.0 wt% Li₂O added) heat-treated at 950℃. 2. The phase of the precipitated crystals was turned out to be the tetragonal leucite crystal. 3. Maximum relative crystallinity was 64.2% for composition L-2, heat-treated at 950℃. Its linear thermal expansion coefficient was 16.1×10-6/℃ in the range of room temperature to 500℃. 4. The optimum mixing ratio of the leucite-containing glass was 45% in order to match the thermal expansion coefficient of dental porcelain to that of metal. In this case, the thermal expansion coefficient of the prepared dental porcelain was 10.6×10-6/℃ (∼500℃). 5. The physical and chemical properties of the prepared dental porcelain were suitable for the requirements of ISO 6872 and 9693.

山間地帶의 效果的인 土地利用에 關한 硏究

金厚根,徐大振 진주산업대학교 1968 論文集 Vol.1 No.-

Purpose of Study The major purpose of this study was to find out ownership of agricultural production resources and differences in income level between the tobacco-growing farms and sericulture farms in the mountain area, and to find out which crop is more profitable to be planted, tobacco or sericulture. The results obtained are as follows: 1.The average area of crop land per farm was 6.68 tanbo in tobacco farms, 10.24 tanbo in sericulture farms. 2.The average man-e??uivalents of family labor were 2.47 men in tobacco farms, 3.28 men in sericulture farms. 3.Farm assets per farm were 578,772 won in tobacco farms, 686,060 won in sericulture farms. The value of fixed assets covered about 96.4 per cent of the total asset value in tobacco farms, 93.8 per cent in sericulture farms. 4.Gross farm reciepts per farm was 127,921 won in tobacco farms, 205,775 won in sericulture farms. About 71.3 per cent of the gross farm reciepts was obtained from crop production, about 8.2 per cent from livestock production, and about 3.3 per cent from off-farm work in tobacco farms, while sericulture farm, about 66.9 per cent from crop production, about 29.2 per cent from livestock production, and 5.6 percent from off farm work in sericulture farms. 5.Farm expenses were 44,040 won in tobacco farms, 35,818 won in sericulture farms, and those for wages and fertilizer was highest in tobacco and sericulture farms. 6.Farm income was 83,881 won in tobacco farms, 169,957 won in sericulture farms. Farm income per tanbo was 12,558 won in tobacco farms, 16,597 won in sericulture farms. Farm income per M.E. was 33.964 won in tobacco farms, 51,816 won in sericulture farms. 7.Reciepts per dollor expense was 65.5won in tobacco farms, 82.5won in sericulture farms. 8.Proportion of cash income to gross farm reciepts was 50.4 per cent in tobacco farms, 56.6 per cent in sericulture farms. And proportion of cash income of tobacco to total reciepts was 20.3 per cent, and 6.9 per cent in sericulture farms. 9.Coefficent of variation of gross receipts per tanbo of the cocoon was higher than that of tobacco, while coefficient of variation of cocoon per box was lower than that of tobacco. 10.It is evident through the study that sericulture farms were enable to cultivate crop land more than tobacco farms did, and also that the possibility to enlarge the size of sericulture farms was greater than that of tobacco farms.

부가가치를 이용한 생산성향상에 관한 연구

김대호,서승록,류영근 대구대학교 과학기술연구소 2000 科學技術硏究 Vol.7 No.1

The value-added can estimate customer's satisfaction and determine production levels. So the value-added is acceptable as a desirable goal which is expectable by enterprises and organizations, etc. The applications of value-added concept are essential to know new value of firms. This study is application of value-added by the Rucker share of production principle and application of value-added management(VAM) for progress of productivity. As a result, we suggested device which can give progress of productivity and value-added of firms same time.

위암 환자의 복강내 투여를 위한 Activated Charcoal-Alginate Bead 제형으로부터 Mitomycin C의 용출 거동

이진호,최선웅,서중기,김동민,정경수,오정연,김진향,노승무,민병무,김용백,김창식,박근성,강대영,송규상,양준묵,조준식,정현용,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherapy seems a logical choice for cancer chemotherapy. In this study, Mitomycin C (MMC)-activated charcoal (CH)-alginate (ALG) beads were prepared by the mixtures of CH particles adsorbed with MMC as an anti-cancer drug and aqueous alginate solution. The alginate is recognized as biodegradable, nontoxic, and biocompatible. The release of MMC from the beads in 0.1 M Tris buffer was stable and continuous until about 1 week. The MMC-CH-ALG beads can be applied in the peritoneal cavity for intraperitoneal chemotherapy since they provide a good adhesiveness on the tissue and controlled release pattern of the drugs.

논문 : 수질제어를 통한 관 내부 부식방지 기술의 정수처리공정 적용방안

서대근 ( Dae Keun Seo ),왕창근 ( Chang Keun Wang ) 대한상하수도학회 2006 상하수도학회지 Vol.20 No.4

Although final water of domestic water treatment plants almost contains highly corrosive characteristics, the countermeasures for eliminating internal corrosion of pipeline system have not been conducted yet by controlling water quality in plants. The technologies of internal corrosion control are to control water quality parameters(pH, Alkalinity, and Calcium Hardness etc.) and to use corrosion inhibitor. Under the conditions of domestic water treatment, first of all, the technologies of adjusting water quality parameters has to be considered. Otherwise, The technology of using corrosion inhibitor is favorably thought to be applied with the technology of adjusting water quality parameters in accordance with the result of availability for water treatment process. Since the technology of adjusting water quality parameter influences on other water treatment processes, the guideline of water quality management to be apt for water quality characteristic is required to be estabilished. While the selection of proper chemicals and technologies is dependent upon the raw water characteristics and water treatment process, typically, the technology of Ca(OH)2 & CO2 additions is considered more effective than other technologies in order to adjust pH and Alkalinity, increase Ca(2+) and form CaCO3 film

인터넷 전자상거래의 최근동향과 수출 기업의 대응방안

서대원,이근영 한국생산성학회 1998 生産性論集 Vol.12 No.3

Registance Mechanism of the Diamondback Moth (Plutella xylostella) to Prothiofos

Seo Bo-Yoon,Lee Dae-Weon,Chung Bu-Keun,Boo Kyung-Saeng 한국응용곤충학회 2004 한국응용곤충학회 학술대회논문집 Vol.2004 No.1

A Numerical study for the efficacy of flow injection on the diminution of rudder cavitation

Seo, Dae-Won,Lee, Seung-Hee,Kim, Hyo-Chul,Oh, Jung-Keun The Society of Naval Architects of Korea 2010 International Journal of Naval Architecture and Oc Vol.2 No.2

The complete avoidance of cavitation, as a result of gap flow between the fixed and movable portion of a horn type rudder system, is difficult. To reduce gap flow, it is a common practice to attach a half round prismatic bar that protrudes beyond the concave surface of the horn facing the gap and laid along the centerplane of the rudder. However the employment of such a device does not always yield satisfactory results. Previously, the authors have shown that a pair of blocking bars, attached on the convex surface of the movable portion, better enhance the blocking ability of gap flow to that of a single centre bar installed on the concave surface. This also circumvents difficulties that might occur in practical applications. In the present study, a series of numerical computations show that flow injected into the gap of a rudder may also block the flow within, without employment of any physical devices, such as a half circular bar. This study also shows that the combination of flow injection and blocking bars may result in the synergic augmentation of blocking efficiency of gap flow, as demonstrated in computations for a three dimensional rudder system.

Automatic Lighting System Using Multiple Robotic Lamps

Dae-Keun Yoon,Jong-Tae Seo,Eui-Jung Jung,Byung-Ju Yi IEEE 2014 IEEE/ASME transactions on mechatronics Vol.19 No.3

<P>An automatic lighting system using 3-DOF robotic lamps and a laser scanner is proposed in this paper. The 3-DOF robotic lamp, which is designed with a spherical parallel mechanism with a unique forward kinematic solution, has a tilting motion to track a person and zoom-in and zoom-out motions to control the light intensity. In order to minimize the dynamic load, three actuators are installed at the base frame, and a counterbalancing design is considered. The positions of people are detected by a laser scanner, and the Kalman filter and a data association algorithm are applied in order to track the positions of people accurately. Therefore, multiple robotic lamps can track and illuminate each person continuously. We demonstrate experimentally that three robotic lamps mounted on the ceiling illuminate three people independently and control the intensity of the light according to the distance between a person and the robotic lamp.</P>