컴퓨터 영상처리를 이용한 오이 생장 분석

배영환,안용국 順天大學校 1998 論文集 Vol.17 No.1

본 연구에서는 다중 컴퓨터 영상으로부터 3차원 좌표를 복원하는 방법을 이용하여 오이의 초장, 줄기 두께 및 엽면적을 측정하였다. 3차원 좌표 복원의 오차는 지면에 대하여 각각 수평과 수직으로 설치된 두 개의 카메라를 사용하는 경우에 평균 7.6㎜이었다. 오이 초장 측정 오차의 절대값 평균은 17.2㎜로 비교적 크게 나타났으며, 이는 3차원 좌표 복원 과정에서의 오차에 기인하는 것이라고 판단된다. 오이 줄기 두께의 측정오차는 평균 0.25㎜로 매우 정확한 것으로 나타났다. 개체 엽면적 측정의 오차는 평균 6.9㎣이었다. The height, thickness of stem, and area of individual leaves of cucumber plants were estimated by using multiple computer images. The images of cucumber plants were obtained by three CCD cameras located at mutually-orthogonal orientations. The average error in 3D coordinate reconstruction was 6.1 ㎜. The results showed an average error of 17.2 ㎜ in the estimation of plant height, which was much influenced by the accuracy in 3D coordinate reconstruction. The accuracies in the measurements of stem width and individual leaf area were 0.15 ㎜ and 6.9㎣, respectively.

賃金滿足의 決定要因에 관한 硏究

裵武煥,金榮載 관동대학교 경영경제연구소 2002 경영논집 Vol.21 No.-

조직에 있어서 임금배분의 문제는 중요한 행동적 영향력을 갖게 되는데, 임금은 금전적 보상으로서 조직의 가장 중요한 비용항목이며 근로자에게는 생계를 위한 주요 수입원이다. 임금은 사회적 신분이나 경제적 지위를 규정할 뿐만 아니라 직무만족이나 동기유발의 중요한 요인이다. 효율적인 임금관리를 위해서는 종업원들이 임금의 도구성을 어떻게 지각하고 있는지 또 임금이 종업원들의 태도나 행동에 어떠한 영향을 미치는지에 대한 연구가 필요하다. 본 연구는 "D"시에 소재하는 금융기관 종사자들을 대상으로 하여 임금만족을 결정하는 요인이 무엇인지를 조사하고, 실증분석하여, 임금만족과 직무만족과의 상관관계를 규명하여 효율적인 임금관리에 중요한 시사점을 제시하였다.

煙草의 折衷被覆栽培에서 着根肥 施用이 初期生育에 미치는 影響

張鎔煥,石泳善,裵吉寬 충북대학교 엽연초연구소 1999 煙草硏究 Vol.17 No.-

This experiment was conducted to investigate the effects of starter solution on the growth responses of flue-cured tobacco at the transplanting time, which had been cultivated with compromised mulching culture system, and to find out the ways to reduce the damages at the early growth stage due to low temperature and drought. The results were summarized as follows. 1.Soil moisture content of the compromised mulching plot at the early growth stage after transplanting was lower, 2∼4%, than that of the pit-covered mulching culture. 2.The growth of flue-cured tobacco during early growth stage in compromised mulching culture plot were delayed about 5 days compared to those of the pit-covered mulching culture. 3.200ppm of (NO4)2SO4, NH4NO3 and KNO3 application had accelerating effects on the early growth of tobacco. 4.By applying 200 and 300ppm of KNO3 and 100 and 200ppm of NH4NO3 as starter solution, the growth of length and width of largest leaf, plant height, weight of top and roots, root length were accelerated during early growth stage.

순천대학교 농과대학 개편 방안

임행진,배인휴,임준택,배영환 순천대학교 1996 大學發展硏究論文集 Vol.2 No.-

1. 대학 명칭 변경 농과대학을 생명자원 과학대학으로 개편 2. 학부제 운영 방안 1) 제1차안에 따른 6개 학부로 개편하되 추가적인 여론 수렴이 반드시 요망됨. 2) 학부 운영시 정원 감축 요망 현행 395명 → 300명 (24% 감축) 3) 학부 구성시 전공의 세분화는 지양하되 통합을 위한 새로운 분야는 인정한다. 3. 교과과정의 운영 1) 교양과목―외국어 및 전산 교육 강화 2) 전공과목 ① 강의 책임시수를 하향 조정하여 강의 내실화 도모 ② 유사과목 중복 개설 지양 ③ 복수전공제 도입 ④ Team teacing, 동일 과목 분반제 등의 도입으로 전문성 제고 3) 교과과정의 개편 절차 (1) 농대에 교과과정 개편위원회를 설치하여 자체 의견을 수렴 (2) 교과과정 개편위원회에서 ① 교양과목 이수 학점 조정 ② 학부(전공)간 중복 및 유사 교과목 조정 ③ 공통 과목 담당 교수진과 강의분담 방법 결정 ④ 복수전공 허용 범위 및 시행 방안 조정 4. 대학 발전 방안 1) 농과대학 특성화 시설원예 분야로의 특성화유도 2) 대 농민 기술지원 센타 설립을통한 현장애오 해결 연구부, 교육부, 지도부, 농업정보부, 식물병원 등 설치 3) 대학의 자립 능력 배양 ① 농대 발전기금 조성, 농대 부석기관의 자체 수익사업 운영 ② 부속기관의 수익을 재투자할 수 있도록 제도 개선 4) 연구 여건 개선 ① 연구 전담 교수제 확대 시행 ② 공동기기동 설치 및 전공별 공동기기실 운영 The problems that College of Agriculture in Korea are confronted with consist of a few number of faculty members in very department, and hence too many lecture hours per prefessor, departments with similar speciality, duplicated subjects, and hence duplicated lectures in similar subjects, poor experimental equipments, poor extension system, and a small amount of budget. It would be necessary to reorganize the system of College of Agriculture to solve these problems. The objective of the study is to construct the direction of reorganization of College of Agriculture in Sunchon National University. For the objective, survey composed of all professors in the Agricultural College and discussions among committee members were adopted. Survey data was collected and analysed. Through the study, reorganization strategies were built as the point of change of college name, administration of school system by unifying departments with similar major area, basic directions in reconstructing the curriculum for the school system, and strategies for the growth of the College. 1) Name of College of Agriculture will be changed to College of Life and Resource Science. 2) College of Agriculture can be reorganized into six schools based on survey, and for more concrete reorganization, additional opinions must be gathered. Number of incoming student can be reduced for school system from 395 at present to 300 (24% reduction). Finely specialized major should be prohibited, but addition of departments or speciality of new research area can be allowed for the establishment of administration of school system. 3) In management of curriculum, foreign language and computer science should be reinforced as general course in the school system. Obligated lecture hours of professor should be reduced, which would enhance the quality of lecture, and offerring lectures with similar subjects should be restricted. Dual major system is going to be allowed. Team teaching and class separation for the same subject should be allowed for the enhancement of lecture quality. In curriculum revision process, committee of curriculum revision in College of Agriculture must be set up and gather opinios for better revision. The committee regulate the credits for the general course, control overlapping or similar subjects among the schools(majors), select lectures for team teaching and the way of class separation in the same subject. They also provide permitted limits of and the way of conducting dual major system. 4) For further growth of the college, the following items should be satisfied. With the limited number of faculties, concentrating facilities and research capability of the college into specialized area is needed to enhance the competitive power of the college. In this study, the committee agreed to select horticultural area in greenhouse as the specialized area. This will be achieved gradually by employing new faculty members with major in this area and conducting cooperative research among faculty members. An extension system to train farmers for the newly developed technologies in agriculture should be established. In this facility, farmers can exchange their experiences among them, and farmers and the university faculty members can conduct experiments to solve problems occurred in farming practices. The extension system consists of division of reasearch, education, advise, information in agricultural area, and diagnosis of pest and diseases. Annual budget of the college largely depends upon the budget from the Ministry of Education. With the limited budget, it is almost impossible for the college to invest into the area where college faculty members intend to for the farmers. Collection of a fund for the growth of the college is needed. This fund can be gathered either from the alumni, faculty members and students or by reinvesting the profit from experimental farm of the college. The system for the reinvestment of the profit from appendges of the college should be established. The condition of research should be improved. This can be achieved by employing full-time researchers as faculty members and reducing lecture load of professors. Building for the center of cooperative research and systematic installation of experimental facility and equipments might also be needed for the improvement.

FACTORS AND DEVELOPMENTS IN GRADING CUT FLOWERS

Yeong Hwan Bae,Hyun Mo Koo 한국농업기계학회 1996 ICAMPE 요약집 Vol.3 No.-

RESEARCH ACTIVITIES ON A SUPERCRITICAL PRESSURE WATER REACTOR IN KOREA

Bae, Yoon-Yeong,Jang, Jin-Sung,Kim, Hwan-Yeol,Yoon, Han-Young,Kang, Han-Ok,Bae, Kang-Mok Korean Nuclear Society 2007 Nuclear Engineering and Technology Vol.39 No.4

This paper presents the research activities performed to date for the development of a supercritical pressure water-cooled reactor (SCWR) in Korea. The research areas include a conceptual design of an SCWR with an internal flow recirculation, a reactor core conceptual design, a heat transfer test with supercritical $CO_2$, an adaptation of an existing safety analysis code to the supercritical pressure condition, and an evaluation of candidate materials through a corrosion study. Methods to reduce the cladding temperature are introduced from two different perspectives, namely, thermal-hydraulics and core neutronics. Briefly described are the results of an experiment on the heat transfer at a supercritical pressure, an experiment that is essential for the analysis of the subchannels of fuel assemblies and the analysis of a system safety. An existing system code has been adapted to SCWR conditions, and the process of a first-hand validation is presented. Finally, the corrosion test results of the candidate materials for an SCWR are introduced.

Sorting Cut Roses with Color Image Processing and Neural Network

Bae, Yeong Hwan,Seo, Hyong Seog,Choi, Kyu Hong 한국농업기계학회 2000 Agricultural and Biosystems Engineering Vol.1 No.2

Quality sorting of cut flowers is very essential to increase the value of products. There are many factors that determine the quality of cut flowers such as length, thickness, and straightness of stem, and color and maturity of bud. Among these factors, the straightness of stem and the maturity of bud are generally considered to be more difficult to evaluate. A prototype grading and sorting machine for cut flowers was developed and tested for a rose variety. The machine consisted of a chain-drive feed mechanism, a pneumatic discharge system, and a grading system utilizing color image processing and neural network. Artificial neural network algorithm was utilized to grade cut roses based on the straightness of stem and maturity of bud. Test results showed 89% agreement with human expert for the straightness of stem and 90% agreement for the maturity of bud. Average processing time for evaluating straightness of the stem and maturity of the bud were 1.01 and 0.44 second, respectively. Application of neural network eliminated difficulties in determining criteria of each grade category while maintaining similar level of classification error.

논문 : 정보처리 및 복합기술 ; CIFER(R)를 이용한 무인 헬리콥터의 동특성 분석 (2) -주파수 응답 해석-

배영환 ( Yeong Hwan Bae ),구영모 ( Young Mo Koo ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.6

The aerial application using an unmanned helicopter has been already utilized and an attitude controller would be developed to enhance the operational convenience and safety of the operator. For a preliminary study of designing flight controller, a state space model for an RC helicopter would be identified. Frequency sweep flight tests were performed and time history data were acquired in the previous study. In this study, frequency response of the flight test data of a small unmanned helicopter was analyzed by using the CIFER software. The time history flight data consisted of three replications each for collective pitch, aileron, elevator and rudder sweep inputs. A total of 36 frequency responses were obtained for the four control stick inputs and nine outputs including linear velocities and accelerations and angular velocities in 3-axis. The results showed coherence values higher than 0.6 for every primary control inputs and corresponding on-axis outputs for the frequency range from 0.07 to 4 Hz. Also the analysis of conditioned frequency response showed its effectiveness in evaluating cross coupling effects. Based on the results, the dynamic characteristics of the model helicopter can further be analyzed in terms of transfer functions and the undamped natural frequency and damping ratio of each critical mode.

Effect of Sesbania Incorporation as Nitrogen Source on Growth and Yield of Whole Crop Barley and Reduction of N Fertilizer in Saemangeum Reclaimed Tidal Land

Su-Hwan Lee,Hui-Su Bae,Yang-Yeol Oh,Sang-Hun Lee,Yeong-Joo Kim,Sun Kim,Jin-Hee Ryu,Kang-Ho Jung,Choong-Geun Lee,Jae-Hyeon Kim,Yeong-Doo Kim,Weon-Young Choi,Jae-Yeong Cho,Kyoung-Bo Lee,Keon-Hui Lee,Ki- 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6

It is known that the poor soil fertility of newly reclaimed saline soils is due to the lack of organic matter and available mineral nutrients for crop production. The effect of green manuring with Sesbania aculeata in combination with five rates of urea-N treatments (N0. N25, N50, N75, N100) on the productivity of a subsequent whole-crop barley and the fertility of the reclaimed saline soil in Saemangeum was evaluated in the field during 2013-2014 growing season. Sesbania was grown during summer season (June to October). The amount of Sesbania incorporated was 16.2 Mg ha<SUP>-1</SUP>. Sesbania contributed to 393 kg N ha<SUP>-1</SUP> to the soils when ploughed down and incorporated before whole-crop barley cultivated. The performances of whole-crop barley following sesbania incorporation were significantly affected by a combination of Sesbania manuring and different N rates. The N fertilizer equivalence without N fertilizer following Sesbania was 42.6% (63.9 kgN ha<SUP>-1</SUP>), compared with N100(150 kg N ha<SUP>-1</SUP>) in fallow soils. The whole-crop barley yield responded to N fertilizer rates in both sesbaniaamended and fallow soil. The yield response to nitrogen rates in fallow soil was linear (Y=0.0586X+3.3011, R<SUP>2</SUP> =0.9534), whereas that in sesbania-amended soils was quadratic (Y= -0.001X<SUP>2</SUP>+0.1322X+5.7143, R<SUP>2</SUP>=0.9576). The yield of whole-crop barley in sesbania-amended with increasing N rates was increased up to SN75 (115 kgN) 10.3 Mg ha<SUP>-1</SUP>. Apparent N recovery (ANR) of whole-crop barely showed decreased with sesbania plus increasing rates of N fertilizer. Despite higher yield with sesbania manuring plus increasing N rates, the contributions of N from Sesbania with increasing N rates to whole-crop barley were decreased, whereas those from fertilizer increment due to excessively mineralized Nitrogen. Considering yield, ANR, N contribution from Sesbania and nitrogen fertilizer, the optimum N rate was N50 rate following sesbania incorporation.

CIFER(R)를 이용한 무인 헬리콥터의 동특성 분석 (3) -전달함수 해석-

배영환 ( Yeong Hwan Bae ),구영모 ( Young Mo Koo ) 한국농업기계학회 2012 바이오시스템공학 Vol.37 No.3

Purpose: Aerial application of chemicals with an agricultural helicopter allows for precise and timely spraying and reduces working labor and pollution. An attitude controller for an agricultural helicopter would be helpful to aerial application operator. The objectives of this paper are to determine the transfer function models and to estimate the handling qualities of a bare-airframe model helicopter. Methods: Transfer functions of a model unmanned helicopter were estimated by using NAVFIT and DERIVID modules of the CIFER? program to the time history data of frequency sweep flight tests. Control inputs of the transfer functions were elevator, aileron, rudder and collective pitch stick positions and the outputs were resulting on-axis movements of the fuselage. Results: Minimum realization of the transfer functions for pitch rate output to elevator control input and roll rate output to aileron control input produced second order transfer functions with undamped natural frequencies around 3.0 Hz and damping ratios of 0.139 and 0.530, respectively. The equivalent time delays of the transfer functions ranged from 0.16 to 0.44 second. Sensitivity analysis of the proposed parameters allowed derivation of minimal realization of the transfer functions. Conclusions: Handling quality of the model helicopter was addressed based on the eigenvalues of the transfer functions, corresponding undamped natural frequencies with damping ratios. The equivalent time delays of the lateral-directional motion ranged from 0.16 to 0.44 second, longer than the 0.1 to 0.15 second requirement for well-controlled typical manned aerial vehicles.