지하수 이용을 위한 열교환기 개발. I - 냉각핀의 설계제작 -

이운용,안덕현,김상철,박우풍,강용구,김선배,Lee, W.Y.,Ahn, D.H.,Kim, S.C.,Park, W.P.,Kang, Y.G.,Kim, S.B. 국립한국농수산대학교 교육개발센터 2002 현장농업연구지 = Journal of practical agricultural resear Vol.4 No.1

This study was conducted to develop the heat exchanger by utilizing the heat energy of underground water(15℃), which might be used for cooling and heating system of the agricultural facilities. We developed the heat exchanger, parallel type plat fin tube made of Aluminum(Al 6063), which was named Aloo-Heat(No. of The registration design : 0247164, by Korean Intellectual property Office). The fin of exchanger was design of the granulated surface for minimizing fouling factor and dew forms, and also placed parallel to the tube in order to minimized the resistance of flows. 1. Aloo-heat was designed to have 0.03m for inside diameter, 0.036m for outside diameter of tube, 0.0012m for thickness of fin and 0.032m for length of plat fin. 2. t was also designed to have 1.5248m²/m for outside area of heat transfer, 0.0942m²/m for inside area contacting hot liquid, and the ratio (Ra) was 16.1869. 3. Efficiency of the fin was 93 percentage when fin length was 0.032m, and the fin thickness satisfied equation $\frac{h{\rho}}{k}$< 0.2 when it was 0.0012m. 4. According to the performance test of Aloo-heat, as the temperature and rate increased, the heating value also increased, heating value was 504kJ/h·m and 6,048kJ/h·m when it was 60℃, 10 𝑙/min and 80℃, 40 𝑙/min respectively. 5. The test of heating value was confident, because correlation value(R²) was 0.9898 for the temperature and 0.9721 for flow rate of hot liquid, respectively.

지하수 이용을 위한 열교환기 개발. II - 지하수이용 냉·난방기 설계제작 -

이운용,안덕현,김상철,박우풍,강용구,김선배,Lee, W.Y.,Ahn, D.H.,Kim, S.C.,Park, W.P.,Kang, Y.G.,Kim, S.B. 국립한국농수산대학교 교육개발센터 2002 현장농업연구지 = Journal of practical agricultural resear Vol.4 No.1

This study was conducted to develop the heat exchanger by utilizing the heat energy of underground water(15℃), which might be used for cooling and heating system of the agricultural facilities. We developed the heat exchanger by using the parallel type plat fin tube made of Aluminum(Al 6063), which was named Aloo-Heat(No. 0247164, offered by Korean Intellectual property Office). The trial manufactures were made from Aloo-heat which was 600mm, 700mm length respectively, and It were welded to the end "U" type in order to direct flow of the underground water. The performance test was carried out under the condition of open space and room temperature with the change of flow rate of the underground water and air. The results are as follows. 1. The trial manufactures had convection heat value from 33 to 156 W/m²℃, and It was coincided with design assumption. 2. The amount of energy transfer was increased with the increment of the area of heat transfer, the air flow, the gap of temperature inlet & outlet the underground water and the air. 3. The heat value was 6,825W when the air flow was 6,000m³/h and the gap of temperature between inlet and outlet of the underground water was 6℃, and It dropped from 25.8℃ to 23.2℃(-2.6℃ difference). The convection heat value was 88.5W/m²℃. 4. The heat value was 2.625W when the air flow was 4,000m³/h and the gap of temperature between inlet and outlet the underground water was 2℃, and It dropped from 27℃ to 22.5℃(-4.5℃ difference). The convection heat value was 33.6W/m²℃. 5. Correlation values(R²) of the testing heat values of the trial manufacture type I, II, and III were 0.9141, 0.8935, and 0.9323 respectively, and correlation values(R²) of the amount of the air flow 6,000m³/h, 5,000m³/h, 4,000m³/h were 0.9513, 0.9414, and 0.9003 respectively.

볏짚 시용(施用) 답(畓)의 Rotary 경운시(耕耘時) 날의 궤적(軌跡) 진입각(進入角)이 볏짚 감김에 미치는 영향(影響)

이운용,김성래,Yi, Woon Young,Kim, Soung Rai 충남대학교 농업과학연구소 1986 Korean Journal of Agricultural Science Vol.13 No.1

볏짚을 토양표면(土壤表面)에 살포(撒布)한 답(沓)을 동력경운기(動力耕耘機)의 Rotary로 경운작업(耕耘作業)할 때 볏짚이 Rotary 경운(耕耘)날과 축(軸)에 볏짚이 감기는 것을 방지(防止)기 위(爲)하여 토양함수비(土壤含水比)(30%, 39%, 59%) (d.b.)와 볏짚의 절단(切斷)길이 (30cm, 45cm, 90cm), 경운(耕耘)날의 궤적진입각(軌跡進入角)($30^{\circ}$, $40^{\circ}$, $50^{\circ}$, $55^{\circ}$, $60^{\circ}$, $70^{\circ}$, Rotary의 전진속도(前進速度)(저속 l단, 저속 2 단, 저속 3단) 에 변화(變化)를 주어 충남(忠南) 유성(儒城)의 점질양토(粘質壤土)의 답(沓)에서 아끼바레 볏짚을 10a 당(當) 450kg 시용(施用)하고 각(各)처리구별(處理區別)로 경폭(耕幅) 30cm, 길이 5m의 포장(圃場)에서 볏짚 감김량(量)을 조사분석(調査分析)하였으며 실험결과(實驗結果)를 요약(要約)하면 다음과 같다. 1, Rotary 경운(耕耘)날의 궤적진입각(軌跡進入角) $55^{\circ}$ 이상(以上)이고 토양함수비(土壤合水比)가 30%(d.b.), 볏짚의 절단(切斷)길이가 30cm일 때 볏짚의 감김현상(現像)이 나타나지 않았다. 경운(耕耘)날의 궤적진입각(軌跡進入角)은 토양(土壤)의 절삭저항(切削抵抗), 경운소요동력(耕耘所要動力)과 볏짚의 감김현상(現像)을 함께 고려(考慮)하여 검토(檢討)되어야 할 사항(事項)이나 볏짚의 감김작용(作用)만을 고려(考慮)할 때 경운(耕耘) 날의 궤적진입각(軌跡進入角)은 $55^{\circ}$ 이상(以上) 유지(維持)되어야 한다. 2. 토양함수비(土壤合水比)가 30%(d.b.)일 때 볏짚의 감김량(量)이 최소직(最少直)를 나타내었으며 경운(耕耘)날의 진입각(進入角)이 $55^{\circ}$ 이상(以上)일 때 볏짚의 감김현상(現像)이 나타나지 않았다. 따라서 볏짚 시용답(施用沓)의 Rotary 경운작업(耕耘作業)은 건기(乾期)를 이용(利用)하여 작업(作業)해야 할 것으로 사료(思料)된다. 3. 볏짚의 절단(切斷)길이가 30cm 이고 경운(耕耘)날의 궤적진입각(軌跡進入角)이 $55^{\circ}$ 이상(以上)일 때 볏짚의 감김량(量)이 없었으며 볏짚의 절단(切斷)길이는 30cm 정도(程度)가 볏짚 시용답(施用沓)의 Rotary 작업가능(作業可能) 최장(最長)길이며 볏짚의 절단(切斷)길이가 30cm 이상(以上)일 때는 Rotary 경운작업(耕耘作業)에 불리(不利)하다. 4. Rotary 전진속도(前進速度)가 증가(增加)하연 볏짚의 감김량(量)도 완만(緩慢)하게 증가(增加)하였으며 볏짚이 시용(施用)된 답(沓)의 Rotary 작업(作業)은 저속 1 단 (0.35m/s)이 좋은 것으로 사료(思料)된다. This study was carried out to prevent the entwining of rice straw on rotary shaft and blade where rice straw was spreaded on paddy field as an organic source before rotary tilling. The rotary tillage was conducted in the paddy field having the soil moisture contents of 30%, 39%, 59% in dry basis and spreaded rice straw (450kg/10a) of 30cm, 45cm, 90cm length with the edged curve angles of rotary blade of $30^{\circ}$, $40^{\circ}$, $50^{\circ}$, $55^{\circ}$ at Yuseung area. And the test were performed on the plot which has width of 30cm and 5cm length and the quantity of entwined rice straw was analized. The test results were summarized as the followings. 1. Entwining phenomenon of rice straw was decreased as the blade edged curve angle increased. The edged curve angle of rotary blade must be determind by considering the characteristics of soil cutting resistance, tilling torque and entwining phenomenon of rice straw. But according to the entwining phenomenon of rice straw only, the edged curve angle of rotary blade should be bigger than $55^{\circ}$ for design. 2. Amount of entwining rice straw was minimized when soil moisture contents was 30 percent (d. b.). It would be better that rotary tillage is performed when soil moisture contents is lower than 30 percent in dry basis. 3. Amount of entwining rice straw was minimized when the length of rice straw was 30cm with $55^{\circ}$ edged curve angle. Therefore, it would be better to chop rice straw as 30cm. 4. Entwining phenomenon of rice straw was decreased as the forward speed decreased. To decrease the entwining rice straw, rotary tillage should be done with forward fist gear (0.35m/s).

농기계 투입모형 설정 및 기계이용 비용 분석연구 - PC 용 프로그램 개발 -

이운용,김성래,정두호,장동일,이동현,김유학 ( W . Y . Lee,S . R . Kim,D . H . Jung,D . I . Chang,D . H . Lee,Y . H . Kim ) 한국농업기계학회 1991 바이오시스템공학 Vol.16 No.4

음식 알레르기 표시 및 대체 음식 및 식품 추천 시스템 연구

김상철 ( Sang-cheol Kim ),이운용 ( Woon-yong Lee ),박우풍 ( Woo-pung Park ),김종린 ( Jong-lin Kim ),윤재용 ( Jae-yong Yun ),윤기오 ( Ki-oh Yun ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2

시스템은 음식 알레르기가 있는 사용자에게 제공되는 식단을 계획하거나 제공할 때 음식, 식품 또는 레시피에 알레르기 성분이 있는지를 확인하고 표시함으로써 음식 알레르기를 예방할 수 있으며, 더 나아가 음식 알레르기의 대체 식품을 추천하고 선택하는 기능을 제공한다. 또한 음식 영양성분 및 열량을 재산정 함으로써 영양균형을 이룰 수 있는 환경을 제공한다.

논문 : 정보처리 및 복합기술 ; 다중 GPS 수신기에 의한 농업용 차량의 정밀 위치 계측(1) -오차추정 시뮬레이션 및 고정위치계측-

김상철 ( S. C. Kim ),조성인 ( S. I. Cho ),이승기 ( S. G. Lee ),이운용 ( W. Y. Lee ),홍영기 ( Y. G. Hong ),김국환 ( G. H. Kim ),조희제 ( H. J. Cho ),강지원 ( G. W. Gang ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.2

This study was conducted to develop a robust navigator which could be in positioning for precision farming through developing a plural GPS receiver with 4 sets of GPS antenna. In order to improve positioning accuracy by integrating GPS signals received simultaneously, the algorithm for processing plural GPS signal effectively was designed. Performance of the algorithm was tested using a simulation program and a fixed point on WGS 84 coordinates. Results of this study are aummarized as followings. 1. 4 sets of lower grade GPS receiver and signals were integrated by kalman filter algorithm and geometric algorithm to increase positioning accuracy of the data. 2. Prototype was composed of 4 sets of GPS receiver and INS components. All Star which manufactured by CMC, gyro compass made by KVH, ground speed sensor and integration S/W based on RTOS(Real Time Operating System)were used. 3. Integration algorithm was simulated by developed program which could generate random position error less then 10 m and tested with the prototype at a fixed position. 4. When navigation data was integrated by geometrical correction and kalman filter algorithm, estimated positioning erros were less then 0.6 m and 1.0 m respectively in simulation and fixed position tests.

New Paradigms of Sport & physical Education in the 21st Century PROCEEDINGS 1 / 6 . Sport Physiology ( Baekhap Rm. ) : 소방대원들의 근무 형태에 따른 안정시 및 운동시 호흡기능

김남익(Nam Ik Kim),김덕중(Duck Jung Kim),이운용(Woon Yong Lee),이진오(Jin Oh Lee),윤찬호(Chan Ho Yoon),김창규(Chang Kew Kim) 한국체육학회 2000 The 2000 Seoul International Sport Science Congres Vol.- No.-

미국의 도시재생수법으로서 BID(Business Improvement Districts)에 관한 연구

이운용(Lee, Woon-Yong),김민경(Kim, Min-Kyung),이정형(Lee, Jung-Hyung) 한국도시설계학회 2008 도시설계 : 한국도시설계학회지 Vol.9 No.2

서번트 리더십이 공공기관 구성원의 조직몰입 및 직무열의에 미치는 영향 연구: 상사신뢰와 자기효능감의 매개효과를 중심으로

이운용 ( Lee Woonyong ),김호균 ( Kim Hougyun ) 단국대학교 융합사회연구소 2021 공공정책과 국정관리 Vol.15 No.3

공공기관의 경쟁력 제고를 위해서는 구성원의 인식과 태도변화가 우선적으로 이루어져야 한다. 구성원은 조직의 비전과 미션을 수행하는 최소단위로서, 조직에 대한 애착과 업무열정이 조직 전체의 경쟁력을 높이는 원동력으로 작용할 수 있기 때문이다. 본 연구는 이러한 생각에 착안하여, 서번트 리더십의 적용을 통한 공공기관 구성원의 조직몰입과 직무열의를 높이는 방안을 모색하였다. A기관(준정부기관) 전체직원 6,635명을 대상으로 유효 설문응답 1,224개를 확보하였으며 SPSS 25프로그램을 활용하여 통계분석하였다. 분석결과로는, 서번트 리더십이 구성원의 정서적 조직몰입과 직무열의에 정(+)의 영향을 미치는 것으로 나타났다. 또한, 상사신뢰와 자기효능감은 서번트 리더십과 종속변수인 정서적 조직몰입, 직무열의 관계에서 부분매개 역할을 하는 것으로 나타났다. 이러한 연구결과는 호텔, 항공사 등 민간 서비스조직에만 효과가 있을 것으로 여겨졌던 서번트 리더십이, 공공분야에도 적용될 수 있음을 보여주는 새로운 사례라고 할 수 있다. 또한, 고품질 공공서비스에 대한 국민의 바람과 공공기관 혁신이라는 시대적 요구에 대한 방안으로, 서번트 리더십을 제시하고 그 효과를 조명했다는 점에서 실무적으로도 적지않은 의미를 가진다고 할 수 있다. The purpose of this study is to find out how servant leadership influences the work attitude of employees at public institutions. In order to accomplish the purpose, a survey was conducted through intranet targeting all 6,635 employees of “ ‘A’ public institution”, and 1,224 valid questionnaires collected were analyzed using the SPSS program(25 version). Empirical analysis results can be summarized as follows. First, it was found that servant leadership has a positive (+) effect on the trust in superiors and self-efficacy of members. Second, servant leadership has a positive (+) effect on organizational affective commitment and job engagement. Last, trust in leader and self-efficacy have a mediating effect between servant leadership and two dependent variables : affective organizational commitment and job engagement.

공공공간의 입지유형별 매니지먼트 특성에 관한 연구

이운용(Lee, Woon-Yong),이정형(Lee, Jung-Hyung),김정국(Kim, Jung Kook) 대한건축학회 2018 대한건축학회논문집 Vol.34 No.1

Public spaces in the cities are social and economic resources to maintain sustainable urban revitalization. As an importance of public spaces is getting increased, many cities focus on public space management and introduce their own management system. NYC Plaza Program is one of the public space management systems in USA and it was designed in order to transform underused roads and streets into pedestrian public spaces throughout the New York City. Plaza management system works with private organizations" participation as NYC Department of Transportation empowers selected private organizations to the right of management and assists their efforts. In this study, we focused on how the plazas are managed by private sectors and seek to find out characteristics of types of management methods based on landuse(residential, commercial and openspace) status around plazas. We analyzed 61 plazas that generated by NYC Plaza Program with three major conditions of management system including organization, fund and activities. There are three major findings from the analysis. 1)In most residential surrounded plazas, resident-initiative organizations manage small scaled fund and activities meanwhile public agencies support their management. 2)BID is a dominant tool in the commercial surrounded plazas. BID provides with secured fund, mid-sized activities and a broad network with commercial facilities. 3)Openspace-surrounded types are usually using supports of exiting organizations and fund system.