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토양수분조절과 저단밀식재배가 토마토의 생육 및 수량에 미치는 영향
김기돈,윤화모,Kim, Gi-Don,Yoon, Wha-Mo 배재대학교 자연과학연구소 2004 自然科學論文集 Vol.14 No.2
본 연구는 토양수분조절과 저단밀식재배가 토마토의 생육, 수량 및 품질에 미치는 영향을 조사하고자 화방을 2단 및 3단으로 제한하는 동시에 재식밀도를 높게 하여 단위면적당 화방수를 증가시켜 토양수분 억제에 의한 수량 감소를 최소화하고자 수행하였다. 토양수분조절은 개화 40일 후에 관수개시점을 각각 -50kPa, -30kPa, -10kPa로 설정하였으며, 재식주수는 저단밀식재배를 목적으로 대조구에 비하여 2배를 정식하였다. 토양수분억제로 경경, 엽, 초장의 생장이 저하되었으며, 엽의 엽록소함량은 저단밀식재배의 -50kPa과 -30kPa처리에서 대조구에 비하여 높아지는 경향을 보였지만, 저단밀식재배의 -10kPa처리에서는 6단재배한 대조구의 엽록소함량에는 차이가 없었다. 과실의 배꼽썩음과와 열과는 토양수분이 억제될수록 발생율이 높았고 2단재배보다는 3단재배에서 발생율이 높았다. 토양수분의 억제는 과중의 감소를 초래하였고, 특히 저단밀식재배의 -50kPa처리에서 뚜렷한 감소를 보였다. 착과수는 토양수분조절에 따른 차이가 없었지만 제 1화방보다는 제 2화방과 3화방으로 올라갈수록 착과수가 감소하였다. 과실의 건물률은 토양수분이 억제된 -50kPa과 -30kPa처리구에서 대조구보다 높아지는 경향을 보였고, 2단재배보다는 3단재배에서 높아지는 경향을 보였다. 상품수량은 토양수분이 억제된 2단재배의 -50kPa과 -30kPa처리구에서 대조구에 비해 각각 46.3%, 36.7%가 감소하였고, 3단재배는 대조구에 비하여 각각 32.3%, 27.3% 감소하였다. This study aims at investigating the effect of soil moisture control and truss limited high density culture on the growth, fruit yield and quality of tomato. To minimize of loss yield of tomato, flower cluster in number was limited to two and three truss and planting density was raised. Soil moisture control was started from 40 days after anthesis and irrigation point was set in -30kPa and -50kPa, which were compared with -10kPa For high density culture, the planting number of truss limited high density culture was planted twice as many as control. Soil moisture repression reduced the growth of stem diameter, leaf and plant height. Leaf chlorophyll content was higher in -50kPa and -30kPa than control. No significant differences, however, shows in -10kPa. The occurrence rate of bloom-end rot and cracking was increased by growing of irrigation repression. Pinching three fruit truss was higher than pinching two fruit truss in the occurrence rate of them. Soil moisture repression resulted in the reduction of fruit weight and in special, truss limited high density was distinctly decreased in -50kPa. The number of fruit was not affected by soil moisture control, but 3rd flower cluster was lower than 2nd flower cluster in the number of fruits and 2nd one was lower than 1st one. Under irrigation repression, rate of dry matter tended to grow in -30kPa, -50kPa compared with control and pinching three fruit truss was higher than two truss. Marketable yield dropped to 36.7%m 46.3 in -30kPa, -50kPa on pinching two fruit truss and dropped to 27.3%, 32.3% in 3rd flower cluster compared with control.
420J2마르텐사이트 스테인레스강의 최종경도에 미치는 열처리조건의 영향
김기돈,성장현 ( K . D . Kim,J . H . Sung ) 한국열처리공학회 1994 熱處理工學會誌 Vol.7 No.3
The effect of batch annealing conditions and austenitizing temperatures on the hardness and microstructural factors were examined by using 420J2 martensitic stainless steel. In spite of the similler hardness after batch annealing, the difference in hardness at the same austenitizing temperature was caused by changes in dissolved carbon during batch annealing. The highest hardness of the specimen was obtained at the batch annealing temperature of 820℃ and austenitizing temperature of 1050℃. The main factor affecting the final hardness of the cold annealed 420J2 specimen was proved to the austenitizing temperature rather than batch annealing temperature.
김기돈(Ki-don Kim),신요셉(Yosep Shin),이기중(Kijoong Lee),이지혜(Jihye Lee),최대근(Dae-geun Choi),최준혁(Junhyuk Choi),정준호(Jun-ho Jeong),이응숙(Eung-sug Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
We proposed stitch nanoimprint lithography combined with reverse-tone nanoimprint lithography to fabricate a large area nano-structured stamp. The stitch nanoimprint lithography has been a promising alternative to expensive conventional lithography methods such as e-beam lithography and KrF stepper. In this study reverse tone imprint lithography was performed to obtain opposite nano-structured patterns. Silicone(20wt%) contained polymer was coated on imprinted nanopatterns. This layer was used for the etch barrier of a Si wafer. We fabricated 250㎚ line and space grating patterns on 50×50㎟ area. Stitch accuracy of a grating pattern was smaller than 5um, which was undetectable by the naked eye.
삼각형 요소의 격자 세분화를 이용한 자유 표면 유동장의 유한 요소 해석
김기돈(Ki Don Kim),양동열(Dong Yol Yang),정준호(Jun Ho Jeong) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
The analysis involves an adaptive grid that is created under a criterion of element categorization of filling<br/> states and locations in the total region at each time step. By using an adaptive grid wherein the elements, finer<br/> than those in internal and external regions, are distributed at the surface region through refinement and<br/> coarsening procedures, a more efficient analysis of transient fluid flow with free surface is achieved. Using<br/> the proposed numerical technique, the collapse of a dam is analyzed. The numerical results agree well with<br/> the theoretical solutions as well as with the experimental results. Through comparisons with the numerical<br/> results of several cases using different types of grids, the efficiency of the proposed technique is verified.
김기돈(Kee Don Kim),이정한(Jung Han Lee),민경택(Kyung Taek Min),문영진(Young Jin Moon),김경태(Kyoung Tai Kim),조삼현(Sam Hyun Cho),황윤영(Youn Yeung Hwang),임호준(Ho Jun Lim),이항(Hang Lee) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.2
N/A Objective: The purpose of this study was to review the incidence, types, chemotherapy regimens, operation me#thods, pregnancy rate and propiosis of the ov#arian malignancy under the age of twenty years old. Methods: Retrospective reviews of the medical recordings for 22 patients with ovarian malignancy under the age of twenty years old in the Department of Obstetrics and Gynecology, Hanyang University from 1986 to 1997 were done. Results: Gerin cell tumor accounts for the majority of cases (77%), whereas 5 patients(23%) belong to the common epithelial poup which were all mucinous type. Our experiences with 22 cases are as followings: 5 mucinous cystadenocarcinoma, 8 immature teratoma, 4 endodermal sinus tumor, 3 dysgernma and 2 mixed germ cell tumor. The incidence of this group was 8.2% (22/266) in all ovarian malignancy. Fourteen of them are stage I, each one is, stage II and IV, and six patients are stage III. The average age was 14.9 years old in germ cell tumor and 18.4 yems old in mucinous cystadenoearcinoma. Malignant ovarian cancer under the age of twenty can be treated with conservative surgery, followed by adjuvant chemotherapy. Commonly used chemotherapeutic regimens were VAC(Vincristine, Actinomycin-D; Cyclophosphamide), VBP(Vinblastine, Bleomycin, Cisplatin) and BEP(Bleomycin, Etoposide, Cisplatin). Second look operations were done in 11 patienth and histologic positive findings were detected in 4 of them. The length of follow-up ranged ftom 3 months to 137 months and median value was 44 rnonths. Conclusions: It is concluded that for young women who wish to preserve child-bearing capacity, regardless of the stage of the tumor, fertility preserving surgery with complete surgical staging, if necessary followed by combination chemotherapy is an appropriate treatment.