水稻 機械移秧 裁培時 側條施肥方法에 關한 硏究

趙東三,朴裁成,尹汰,朴成圭 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

This experiment was conducted to clarify the effects of different fertilizer types, application me-thods and amounts with band application on the growth and grain yield of rice on experimental fields of Chungbuk Provincial Rural Development Administration in 1990. The results were summarized as follows ; Compared with different fertilizer types and applications methods, plant height were longer in band application with fast or slow releasing compound fertilizer than that of whole layer application with conventional fertilizer, and no. of tillers had same tendency. In band application, no. of panicles were greater compared with that of whole layer application, but no. of grains per panicle and ripened grain ratio showed low tendency. Compared with N fertilizer split application methods, no. of panicles per m2 were low as N fertilizer reduced about 20 to 30% , but no. of grains per panicle and ripened grain ratio were increased. Yields were higher more or less in band application compared with that of conventional fertilizer in the same application amounts, and had no differences in band application as N fertilizer reduced to 20% compared with conventional fertilizer.

방광에서 발생한 염증성 근섬유아세포종

조시완,유지형,노충희,김정연,정재용,성락희 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-

Spindle cell lesions of the urinary bladder are uncommon tumors, and are most often spindle cell (sarcomatoid) carcinomas, non-neoplastic reactive mesenchymal proliferations, or soft tissue sarcomas. Inflammatory myofibroblastic tumors (IMTs) may also occur in this location, but IMTs occurring at bladder sites have rarely been described. We experienced a case of IMT of bladder.

New Criteria for the Consistency in Reasonable Pairwise Comparison Matrices

Jae-Bum Kim(김재범),Yong-Gon Cho(조용곤),Yun-Bae Kim(김윤배),Keun-Tae Cho1(조근태) 대한산업공학회 2010 대한산업공학회지 Vol.36 No.1

The Analytic Hierarchy Process (AHP) has been applied widely in various decision making fields. One of advantages of the AHP is the consistency test. However, it has several problems such as the limit of its concept, the limit of 9 scales and stern criteria, contradictory pairwise comparison. In this paper, we propose new criteria for the consistency with more realistic and ideal conditions. To derive the criteria, we conduct the simulation and use the bootstrap method, which is one of resampling techniques in the simulation area.

원자력발전소 케이블관통부 충전시스템 평가용 소프트웨어 개발 Ⅰ

윤종필,권성필,조재규,윤인섭 한국화재소방학회 2004 한국화재소방학회논문지 Vol.18 No.1

본 논문은 원자력발전소 방화벽에 설치된 케이블관통부 충전시스템(CPFS: Cable Penetration Fire Stop)안에서 일어나는 동적 열전달 현상을 해석하기 위해 수행된 실험을 다루고 있다. Dow Coming사의 내화성 충전물에 대해서 내화실험이 수행되었으며, 본 실험을 통해 준비된 CPFS 시험체가 성능위주 시험방법인 ASTM I-81처 F-rating과 I-rating을 동시에 만족시킬 수 있는지를 알아보았다. 그리고 여기서 얻어진 실험결과는 CPFS시스템 내화성능 평가용 소프트웨어를 개발하기 위해 사용되었다. CPFS 시스템 내에서의 열전도 현상은 주어진 초기조건과 경계조건하에서 Parabolic PDE(Partial differential equation)로 수식화 되었으며, 이렇게 수식화된 PDE는 다시 연속과완화법(SOR: Sequential over-relaxation)과 Galerkin 유한요소법(FEM: Finite element method)로 구성된 혼합알고리즘에 따라 풀 수 있었다. PDE을 풀기 위해 널리 사용되고 있는 상응소프트웨어 Femlab을 이용하여 방화시스템 내에서의 온도분포를 계산하여 3차원 그래픽으로 나타내었다. 특히 CPFS시스템 내에서의 시간의 경과에 따른 온도분포의 변화에 대한 실험과 수치해석을 병행함으로써 결과에 대한 신뢰성을 높일 수 있었다. In this work the dynamic heat transfer occurring in a cable penetration fire stop system built in the firewall of nuclear power plants is three-dimensionally investigated to develop a test-simulator that can be used to verify effectiveness of the sealants. Here was carried out an experiment to observe the heat transfer in the cable penetration fire stop system made of DOW CORNING products. The dynamic heat transfer occurring in the fire stop system is formulated in a parabolic partial differential equation subjected to a set of initial and boundary conditions. And it was modeled. simulated, and analyzed. The simulation results were illustrated in three-dimensional graphics and were compared with experimental data. Through the simulations, it was shown clearly that the temperature distribution was influenced very much by the number, position, and temperature of the cable streams. It also was found that the dynamic heat transfer through the cable streams was one of the most dominant factors, and the feature of heat conduction could be understood as an unsteady-state process. It is certain that these numerical results are useful for making a performance-based design for the cable penetration fire stop system.

水稻 乾沓直播裁培時 播種方法 및 播種量

趙東三,朴裁成,尹汰,朴成圭 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

This experiment was caried out to investigate the optimum seeding amounts with different seeding methods such as flat drill seeding by tractor, high ridged broadcasting and flat broadcasting by power tiller in direct seeded rice on experimental fields of Chungbuk Provincial Rural Development Administration in 1990. The results were summarized as follows ; Labor requirements from seeding to transplanting were decreased about 85% in flat drill seeding by tractor, about 79% in high ridged broadcasting, and about 77% in flat broadcasting by power tiller compared with that of machine transplanting. Seeding stand per m2 and percentage of seeding emergence were the highest in flat drill seeding by tractor compared with those of others. Optimum seeding amounts were 5kg/10a in flat drill seeding by tractor, whereas it was 7kg/10a in other treatments. As the seeding amounts were increased, no. of panicles and grains per m2 were increased, and it showed the highest in flat drill seeding by tractor. Ripened grain ratios hod low tendency as the seeding amounts were increased. In yields, it was the highest in flat drill seeding by tractor compared with seeding methods. Comparing yields with different seeding amounts, it was higher in seeding of 5kg/10a with flat drill seeding by tractor, while it was higher in 7kg/10a with other treatments.

CLSM뒷채움시 Silo토압의 적용에 관한 연구

조재윤 동의공업대학 2001 論文集 Vol.27 No.1

The objective of this study is to present engineering properties of co-mixtures of Waste Foundry Sand(WFS) and fly ash, as a self-leveling, self-compacting and flowable cementitious backfill. And it is studied silo-earth pressure when narrow backfill in this paper. Three different sand (Furane Sand from a foundry located in Pusan, and Modified sand. sea sand) were used in this study. The fly ash generated at the Tae-An thermoelectric power plant was used. Conventional laboratory tests were performed to obtain the engineering properties of the co-mixtures. From the consolidated-undrained triaxial tests, the Furane Sand showed a distinct increase in the internal friction angle, while the other specimens showed negligible increase. In the case of 28-day cured specimens, Furane Sand showed internal friction angle of 41.8°. Using the c' and Φ' obtained from the results of the CIU tests, a case study for a standard retaining wall of 6m was performed, and the construction could be completed less than 7 days. Especially, the stability of retaining wall was increased with curing time.

플라이애쉬-폐주물사 혼합재료의 특성 연구

조재윤 동의공업대학 1999 論文集 Vol.25 No.1

The objective of this study is to present various properties required in use of co-mixtures of fly ash and WFS(Waste Foundry Sand)'s, which are presently used as fill, as flowable backfill. The fly ash generated at the Tae-An thermoelectric power plant used in this research was classified as Class F. The kinds of WFS that were used in this study were Green Sand, Furane Sand, and Coated Sand, which had been used at a foundry located in Pusan. Laboratory experiments were performed to obtain the physical properties of the co-mixture of fly ash and WFS. The permeability of all the co-mixtures did not vary much ranging from 3.0×10-3 cm/s to 6.0×10-5 cm/s. The unconfined strength of the 7-day cured specimens composed of Green Sand reached 94% of that of 28-day cured specimens but for the 7-day cured specimens composed of, respectively, Furane Sand and Coated Sand, only 64% and 66% of the strength of the 28-day cured specimens were reached. Results of the consolidated-undrained triaxial tests showed that the specimens composed of Furane Sand showed a distinct increase in the internal friction angle, while the other specimens showed negligible increase. In the case of 28-day cured specimens, specimens composed of Furane Sand showed an internal friction angle of 41.8o, while specimens of Green and Coated Sand showed those of 33.5o and 35.0o, respectively. From the shrinkage test, the shrinkage ratios of all specimens did not exceed 0.25%.

고도보정 공간내삽에 의한 전국의 1km²단위 기상실황 추정

윤진일,이동석,최재연,조성인,박은우,황헌 한국농업정보과학회 1999 농업정보과학 Vol.1 No.1

Conventional method of generating meteorological surfaces over geographic areas often neglects the elevation effect which is considered to be a single most important control over local climate. Deviation of the estimates may exrled practical limits at some areas with complex toprlgraphy. A digital map featuring coordinates and elevation data of 72 weather stations in Korea were joined with hourly weather(trmperature, relative humidity, precipitation and wind speed) observations at the stations by using a geographic information system software. An inverse distanre weighted interpolation was done on the point features to generate prim-itive meteorological and elevation surface grids consisting of 430×600 cells, respectively. Elevation difference at each cell between the United States Geological Survey's 1 km digital elevation model and this virtual ele-vation surface was calculated. Known relationships between meteorological elements and the elevation differ-ence were used to derive "correction grids" representing the potential effects of elevation difference at each grid cell. The correction grids were added or multiplied to the primitive meteorological surfaces to obtain ele-vation-corrected estimates for corresponding elements. This srheme was applied to hourly data of 27 March 1998 to generate the elevation-corrected mrteorological surfaces. Observed data of 350 automated weather sta-tions were used to partially validate the accuracy of the results. This simple scheme sHelved a feasibility of a near-real time generation of hourly meteorological surfaces for temperature and rainfall with an affordable error range.

다중마커를 이용한 수화인식기법

조재현,엄성용 서울여자대학교대학원 1998 論文集 Vol.- No.6

Sign Language is one means of communication for hearing-impaired people. Words and sentences in Sign Language are mainly represented by hand's gesture. Recently, need for the intelligent human-computer interface has been increased and the hand gesture cognition is an important application in the human-computer interface. In this thesis, we propose a new scheme for effective Korean Sign Language(KSL) cognition. In this system, hand shape and position data are inputted using white glove which is attached the multiple markers. It is better than the existing ones in that it does not need expensive equipments such as Data-Glove and it could allow fast and exact cognition. The proposed technique is devised for Korean Sign Language, but it would be easily extended to the general hand gesture cognitions. Some experimental results are given to show that our method works well for Korean Sign Languages.

Original Articles : Clinical significance of occult hepatitis B virus infection in chronic hepatitis C patients

( Jae Young Jang ),( Soung Won Jeong ),( Sung Ran Cheon1 ),( Sae Hwan Lee1 ),( Sang Gyune Kim ),( Young Koog Cheon ),( Young Seok Kim1 ),( Young Deok Cho1 ),( Hong Soo Kim ),( So Young Jin ),( Yun Soo 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.3

Background/Aims: We investigated the frequency of occult hepatitis B virus (HBV) infection in anti-hepatitis C virus (HCV)-positive individuals and the effects of occult HBV infection on the severity of liver disease. Methods: Seventy-one hepatitis B virus surface-antigen (HBsAg)-negative patients were divided according to their HBV serological status into groups A (anti-HBc positive, anti-HBs negative; n=18), B (anti-HBc positive, anti-HBs positive; n=34), and C (anti-HBc negative, anti-HBs positive/negative; n=19), and by anti-HCV positivity (anti-HCV positive; n=32 vs. anti-HCV negative; n=39). Liver biopsy samples were taken, and HBV DNA was quantified by real-time PCR. Results: Intrahepatic HBV DNA was detected in 32.4% (23/71) of the entire cohort, and HBV DNA levels were invariably low in the different groups. Occult HBV infection was detected more frequently in the anti-HBc-positive patients. Intrahepatic HBV DNA was detected in 28.1% (9/32) of the anti-HCV-positive and 35.9% (14/39) of the anti-HCV-negative subjects. The HCV genotype did not affect the detection rate of intrahepatic HBV DNA. In anti-HCV-positive cases, occult HBV infection did not affect liver disease severity. Conclusions: Low levels of intrahepatic HBV DNA were detected frequently in both HBsAg-negative and anti-HCV-positive cases. However, the frequency of occult HBV infection was not affected by the presence of hepatitis C, and occult HBV infection did not have a significant effect on the disease severity of hepatitis C. (Korean J Hepatol 2011;17:206-212)