저장기간에 따른 3개 수종의 종자 및 발아 특성 변화

한심희,김찬수,장석성,이현주,탁우식 한국농림기상학회 2004 한국농림기상학회지 Vol.6 No.3

This study was conducted to examine the changes in the seed physical characters and germinative properties of three tree species at three different storage times in order to determine the most suitable storage time and condition. Seed physical characters and germinative properties were examined from seeds of Fraxinus rhynchophylla, Zanthoxylum schinifolium and Staphylea bumalda that were stored at -18C for 1, 3 and 10 years, and the growth performance and physiological characters of their seedlings were analyzed. Seed physical characters and germinative properties showed significant differences between three storage times as well as three tree species. Seed moisture content of F. rhynchophylla and S. bumalda and seed fresh weight of Z. schinifolium decreased with increase of storage time. Storage time represented negative correlation with moisture content and fresh weight (r = -0.822, p < 0.01). Seed percent germination of Z. schinifolium and S. bumalda stored for 3 and 10 years decreased less than 15% and 10.7% respectively. Mean germination times for seed of F. rhynchophylla, Z. schinifolium and S. bumalda were delayed 11.9, 5.7 and 9.7 days after a storage time of 10 years, respectively. However the growth and viability of seedlings didn't show a special pattern for storage time and tree species.

유압 인버터 엘리베이터에서의 극저속 속도제어를 위한 퍼지논리 제어기의 설계

한권상,김병화,이우철,장태호,이건학,사공석진,안현식,김도현 대한전자공학회 1999 夏季綜合學術大會 論文集 Vol.22 No.1

In this paper, a fuzzy logic controller is designed for speed control of a hydraulic inverter elevator. Mathematical modeling of an elevator actuated with hydraulic system is presented and the friction characteristics of a cylinder is examined, which may cause the abrupt increase of the acceleration in the zero-crossing speed region. Simulation results show that the proposed fuzzy logic speed controller yields a better control performance than conventional PID controller.

立地特性別 Asbestos의 環境濃度

유영식,김종규,민달기,김남천,이형춘,최한영,김을환,우세홍,이상건 서울保健大學 1989 論文集 Vol.9 No.1

시설참외 연작재배지 토양의 객토 및 심토반전이 토양 화학성 변화와 토양선층 억제효과에 미치는 영향

전한식,박우철,정재식 한국환경농학회 2002 한국환경농학회지 Vol.21 No.1

우리나라의 시설참외 수산지인 성주지역의 시설참외 연작 대책으로 객토와 심경에 의한 토양 화학성분의 변화와 뿌리혹선충 억제 효과를 조사한 결과는 다음과 같다. 시설참외 연작대책으로 많은 양의 객토를 함으로 EC는 4.30 dS/m에서 1.80 dS/m로 58%, 유효인산은 406mg/kg으로 55% 감축되고 유기물 함량이 16g/kg에서 11g/kg으로 31% 줄어 퇴비 등 각종 거름 시용량을 증가해야 하면 뿌리혹선충 밀도 억제효과는 1년 차 89%, 3년 차 84%, 5년 차 69%로 되어 근본 대책이 되지 못하면서 영농비 가중 및 환경 파괴의 문제가 수반되었다. 심토반전 효과도 객토와 비슷하여 EC 4.30 dS/m에서 1.98 dS/m로 54% 줄고 유효인산 406 mg/kg에서 329 mg/kg 으로 19% 줄었으며 뿌리혹선충 밀도 억제 효과는 처리 후 1년 차 71%, 3년 차 67%, 5년 차 42%가 되므로 처리 3년 이후에는 다른 대책이 필요하였다. To elucidate the effect of soil addition and subsoil plowing on the change of soil chemical properties and the reduction of root-knot nematode, this experiment carried out in continuous cropping field of protected oriental melon (Cucumis melo L). Soil addition reduced electric conductivity (E. C.) from 4.3 to 1.8 dS/m (58%), available P_2O_5 from 406 to 182 mg/kg (55%) and organic matter content from 16 to 11 g/kg (31%). Population densities of root-knot nematode in soil reduced as much as 89%, 84%, and 69% at first year, third years, and of five years later, respectively. The effects of subsoil plowing were similar to that of soil addition. E. C. and phosphate were reduced from 4.30 to 1.98 dS/m (54%) and phosphate from 406 to 329 mg/kg (19%), respectively. Population densities of root-knot nematode reduced as much as 71%, 67%, and 42% after 1, 3, and 5 years, respectively. Subsoil plowing reduced nematode densities only for three years.

암모니아 분위기에서 질산갈륨 염으로부터 질화갈륨 분말의 합성

정우식,한승훈 嶺南大學校 工業技術硏究所 2003 工業技術硏究所論文集 Vol.31 No.1

Gallium nitride (GaN) powder was prepared by using a gallium(Ⅲ) nitrate salt in flowing ammonia in the temperature range 600-1050℃. The process of conversion of the salt to GaN was monitored by X-ray diffraction, IR, and ^71Ga MAS (magic-angle spinning) NMR spectroscopy. The salt decomposed to r-Ga_2O_3 and then converted to GaN without r-β Ga_2O_3 phase transition. It is most likely that the conversion of r-Ga_2O_3 to GaN does not proceed through Ga_2O but stepwise via amorphous gallium oxynitride (GaO_xN_y) as intermediates. Room-temperature photoluminescence spectra showed the emission peak at 363㎚. The GaN powders prepared were fused, with its primary particle size being 30-50㎚.

에지 영상을 이용한 MPEG 비디오의 점진적 장면전환 검출

류한진,유헌우,장동식 한국경영과학회 2001 한국경영과학회 학술대회논문집 Vol.- No.1(2)

In this paper, a new algorithm for dissolve scene change detection in MPEG frame sequences is proposed. The proposed algorithm is based on the fact that most of dissolve curves can be characterized by a variance distribution of edge information in the frame sequences. Average edge frame sequences are obtained by performing "sobel" edge detection twice. Features are extracted by comparing a variance with those of local blocks in the average edge frames. Those features are further processed by the opening operation to obtain a smoothing variance curve. The lowest variance in the local frame sequences is chosen as a dissolve detection point. Experimental results show that the proposed algorithm retrieves up to 18 dissolves in total 20 dissolves of some tested videos.

Three-Dimensional Z-Plasty(Yoon's Method)를 이용한 내안각 췌피 성형술

박흥식,김우신,윤진호,나민화,김한중 대한미용성형외과학회 1997 Archives of Aesthetic Plastic Surgery Vol.3 No.1

The presence of epicanthal folds in Asian eyelids is one of their unique features, in combination with the lack of supratarsal folds. Western culture has influenced many people to prefer to eliminate the prominent epicanthal fold. A number of surgical techniques have been suggested for their correction. However, difficulty with design, excessive and prominent scarring of medial canthal and nasal area, recurrence, and rigidity of application are potential problems associated with many procedures. This paper describes a epicanthoplasty with three-dimensional Z-plasty. Through epicanthal fold incision, the medial canthal tendon is medially advanced and sutured to the periosteum of nasal bone. After the transposition of the flaps, trimming of the flap is usually required. Three-dimensional Z-plasty creates the attractive eyes. From March, 1995 to March, 1997, the technique was applied to 37 patients with epicanthal fold and was performed with or without double-fold operation. There were 34 females and 3 males with ages ranging from 17 to 30 years. Through 2 years follow-up, this technique has delivered esthetically good results with minimal postoperative scar and could made the reduction of ICD from 40 ± 2.13 mm to 34 ± 1.98 mm. The advantages of epicanthoplasty procedure using three-dimensional Z-plasty(Yoon's method) are as follows; 1) simple in design 2)minimal postoperative scar in the medial canthal area 3) versatile in its application 4) no recurrence 5) no hypertrophic scar 6) preserving ethnic identity.

청각장애학생을 위한 제과기술 교육내용 및 방법의 적합성 연구

양한재,권순우,윤병천,박정식 대구대학교 특수교육재활과학연구소 2005 특수교육재활과학연구 Vol.44 No.3

이 연구는 청각장애학교에 재학 중인 고등부 학생들이 직업교육으로 제과 기술 교육을 받는데 있어 어려운 점은 무엇이며, 좀 더 쉽게 적응할 수 있는 방법이 무엇인지를 밝히는데 목적을 두고 실시하였다. 이를 위해서 서울에 위치한 A청각장애학교 고등부 3학년에 재학 중인 학생 6명을 대상으로 주1회 5시간씩 실습을 실시하면서 문제점을 찾아내어 개선 방법을 제시하면서 개선되는 내용을 파악하고, 학생들이 쉽고 효율적으로 기술을 익힐 수 있는 방법이 무엇인지 조사하였다. 결과를 종합해 보면 청각장애학생의 특성을 고려하여 직업교육 내용과 방법의 문제점을 찾아내고, 이를 개선하여 적합화한 결과 청각장애학생들이 쉽게 적응하였다. The object of this study is to find out what they feel difficulties and how to adapt well themselves to new circumstances in the process of confectionery technique education which high school students with hearing impairment received an education as vocational education. To achieve goals of this study, the subjects of this study are selected 3 grade, 6 students, who received an confectionery technique education five hour, one time for a week. In the process, the researcher tried to grasp difficulties which they feel and how to adapt themselves to new circumstances. In summary, after finding out problems about content and method of vocational education and then, changing for the better it, the findings of this study showed that students with hearing impairment be to easily adapted to confectionery technique education.

Ki-67이 Luminal B형 유방암 환자의 예후에 미치는 영향

류동원,최우식,이충한 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.1

배경: Ki-67는 세포의 분열지수로서 특히 세포분열초기 나타나는 것으로 알려져 있다. 그래서 Ki-67의 분열지수가 높은 경우 조기 재발 및 예후와 관련되어 있다는 보고가 있다. 본 연구에서는 본원의 자료를 토대로 Ki-67의 분열지수가 예후에 영향을 미치는지를 알아보고자 한다 방법: 2001년 1월부터 2005년 12월까지 본원에서 유방암으로 수술을 받은 679명의 환자를 대상으로 후향적으로 조사를 하였다. 술후 조직병리학적 보고서를 토대로 조사하였다. Ki-67의 수치를 기준으로 10%이하군, 10%에서 20%군, 20%이상군으로 나누었다. 세군사이의 임상병리학적 요소의 분포를 비교하였으며 Kaplan-Meier를 이용하여서 생존율을 분석하였다. 결과: 환자들의 평균나이는 46세였으며, 평균종양의 크기는 3.2cm였다. 20%이상군에서 진행성 유방암환자의 비율이 높았다.(p=0.007) 특히 림프절의 전이정도와도 관련이 있었다.( p=0.003) 그러나 Ki-67과 생존율과는 의미있는 관련성을 없었다.( p=0.6112). 결론: 본원의 조사에 따르면 Ki-67은 진행성 유방암과 호르몬 수용체 음성과는 밀접한 관계를 가지고 있었으나 생존율에는 영향을 미치지 않았다. 그러나 본조사는 추적기간이 짧고 조사 규모가 크지 않아서 향후 계속적으로 추적 관찰한다면 더 의미있는 결과과 나올것이다. Background: Ki-67 expression has been considered to be a reliable marker for assessing tumor cell proliferation. The aims of the ourstudy were to assess the correlationbetween Ki-67 expression and clinocopathologic factors and to analyze the effect of Ki-67 expression on survival rate. Methods:The study subjects, 679 women with breast cancer, were a subset of patients operated at OOO hospital from Jun 2001 to Dec 2005.Patients are grouped into 3 categories according to Ki-67 determined in surgical specimens. Clincopathologic factors were compared with 3 categories of Ki-67. Chi-squared tests were used for statistical analysis. Kaplan–Meier estimates are presented for thesurvival function, and differences in survival were analyzed usingthe log rank test. Results: The median age was 46yrs, and median tumor size was 3.2cm. The strong correlation was observed between tumor staging and Ki-67 staining(p=0.007) and Group III(more than 20% staing) showed more advanced N-staging(p=0.003). The number of patients with estrogen receptor negative was higher in Group III(p=0.001) and that with HER-2 receptor positive was also higher in Group III(p =0.001) comparing with other groups. The univariate analysis for prognostic factors associated with DFS revealed that both the tumor groupas T1, T2, T3 or T4 and lymph node as N0, N1, N2 or N3 were statistically significant(p=0.0003 and p=0.0015 respectively) but the Ki-67 staining as <10%, 10~20%, >20% was statistically not significant(p=0.6112). The univariate analysis for prognostic factors associated with OS revealed that Tumor staging and N-staging was statically significant(p=0.003 and p=0.0015 respectively). Conclusions: According to our study, Ki-67 positive groups was associated with more advanced staging, ER-negative, PR-negative and HER-positive respectively. But there is no significant association between Ki-67 staining and 5-year disease free survival rate including overall survival rate.

丹參과 四物湯水鍼이 CCl_4로 肝損傷된 白鼠의 血液에 미치는 影響

金相姬,韓宗鉉,金庚植,黃祐準 圓光大學校 韓醫學硏究所 1995 원광한의학 Vol.5 No.1

The present experiments were designed to investigate the effects of Aqua-acupuncture with Samultang and Radix Salviae Miltiorrhizae extract on RBC, Hemogolbin and Hematocrit in CCl_4-intoxicated rats. The results obtained are summerized as follows; 1. Aqua-acupuncture with Samultang and Radix Salviae Miltiorrhizae extract increased RBC in CCl_4-intoxicated rats. 2. Aqua-acupuncture with Samultang extract increased Hb in CCl_4-intoxicated rats. 3. Aqua-acupuncture with Samultang and Radix Salviae Miltiorrhizae extract increas-ed Hct in CCl_4-intoxicated rats. From above results, it is suggested that Aqua-acupuncture with Samultang and Radix SALVIAE miltiorrhizae extract has a valid and curative effect on the anemia in CCl_4-intoxicated rats.