• 한국초지조사료학회지
• /
• 제21권2호
• /
• pp.103-108
• /
• 2001

This study was carried out to investigate the introduced route of exotic weeds and the effects of herbicide treatment. Herbicide trial was arranged as a completely randomized block design with treatment 1(\circled1 Dicamba $1\ell$/ha, \circled2 Mecoprop $5\ell$/ha, \circled3 Bentazone $3\ell$.ha, \circled4 Glyphosate $4\ell$/ha and \circled5 Pyrazosulfuron-ethyl 2kg/ha), and treatment 2(\circled1 Dicamba $2\ell$/ha, \circled2 Dicamba $4\ell$/ha, \circled3 Glyphosate $6\ell$/ha, \circled4 Glyphosate 4+Dicamba $1\ell$/ha and \circled5 Glyphosate 4+dicamba $2\ell$/ha) against 10 exotic weed species, and conducted in Suwon, Seosan and Yeongam from 1997 to 1999. Exotic weeds have been mostly introduced within imported cereals for concentrate feed or within seeds for forage production. Most of exotic weeds in forage crop field were controlled more than 95% by herbicide, but it was desirable that the control of exotic weeds was abreast of chemical and ecological method.

• 한국농공학회논문집
• /
• 제55권3호
• /
• pp.63-73
• /
• 2013

The objectives of this study were to develop a hydrologic simulation model to estimate surface drainage for irrigation districts consisting of paddy and protected cultivation, and to evaluate the applicability of the developed model. The model consists of three sub-models; agricultural supply, paddy block drainage, and protected cultivation runoff. The model simulates daily total drainage as the sum of paddy field drainage, irrigation canal drainage, and protected cultivation runoff at the outlets of the irrigation districts. The agricultural supply sub-model was formulated considering crop water requirement for growing seasons and agricultural water management loss. Agricultural supply was calculated for use as input data for the paddy block sub-model. The paddy block drainage sub-model simulates paddy field drainage based on water balance, and irrigation canal drainage as a fraction of agricultural supply. Protected cultivation runoff is calculated based on NRCS (Natural Resources Conservation Service) curve number method. The Idong reservoir irrigation district was selected for surface drainage monitoring and model verification. The parameters of model were calibrated using a trial and error technique, and validated with the measured data from the study site. The model can be a useful tool to estimate surface drainage for irrigated districts consisting of paddy and protected cultivation.

• Korean Journal of Acupuncture
• /
• 제36권4호
• /
• pp.281-291
• /
• 2019

Objectives : As acupuncture treatment has been widely practiced in many countries around the world, clinical trials of acupuncture treatments also have become popular. The objective of the study was to explore the trends of research investigating the effect of acupuncture treatment in clinical trials using a bibliometric approach, a quantitative analytical methods. Methods : Publications related to clinical trials using acupuncture from 2000 to 2019 were retrieved from the Web of Science database. Extracted articles were analyzed in terms of publication year, country, journal, research area, organizations and authors. Trends in research on acupuncture in clinical trials were visualized using the VOSviewer program. Results : A total of 3,166 articles of acupuncture clinical trials published from 2000 to 2019 were identified and analyzed. The country producing the most articles in this field was USA followed by China, England, South Korea, and Germany. A network analysis based on the co-occurrence of keywords showed following three clusters: clinical studies, pain management studies, and methodology studies. Conclusions : This study provided a macroscopic overview of research in acupuncture clinical trials. These findings provide an expansive strategy for researchers in this field to cooperate with other researchers or organizations.

• 설비공학논문집
• /
• 제26권5호
• /
• pp.212-217
• /
• 2014

Recently, the use of renewable energy has been increased due to growing concern on the energy-saving at buildings and the reduction of $CO_2$ emission. In the field of architecture, to reduce the energy consumption of heating, cooling and hot water supply, heat pump systems with renewable energy has been developed and used in various applications. However, there have been many of researches on the large-scale commercial heat pump systems, but the research and the field application of a compact heat pump system is rare. Therefore, in order to develop the compact heat pump for the small-scale residential building, this study conducted the performance test and feasibility study for a hybrid heat pump using the heat source of air, solar and ground. In the results of experiments through a trial product, the average COP of cooling mode with ground heat source was 4.75, and it of heating mode was 4.03. Furthermore, the average COP of cooling mode with air heat source was 2.60, and it of heating mode was 2.92. Finally, payback period of the system was calculated as 9.2 years.

• 척추신경추나의학회지
• /
• 제4권1호
• /
• pp.103-117
• /
• 2009

Objective : The purpose of this study is to research the trend of the theses related to conservative treatment of spinal scoliosis and to establish the direction of futher studies into the spinal scoliosis Methods : We reviewed and analyzed all theses published by Korean research institution. And these theses were classified by field of study, theses type, symptoms and illnesses, evaluation methods, treatment type, clinical outcome. Result and conclusion : 1. Classified by the major field of study, oriental rehabilitation medicine and physical education accounted for 9 papers, followed by 6 in orthopedics medicine. 2. Upon classifying theses according to research method type, clinical trial theses were more than casuistic theses. 3. Upon classifying theses according to symptoms and illnesses in scoliosis, the most was idiopathic scoliosis. 4. Theses used mostly Cobb's angle for evaluating in scoliosis. 5. Some few of theses used chuna therapy for treating in scoliosis. 6. Chuna therapies side by side with correction exercises were the most efficient for treating in scoliosis.

• 한국정보통신학회논문지
• /
• 제9권8호
• /
• pp.1840-1846
• /
• 2005

본 논문에서는 유전 알고리즘을 사용하여 PID의 각 계수를 자동적으로 조정함으로써 DC 서보모터의 속도제어에 적용하였다. DC 서보모터는 산업현장 및 로봇분야에 널리 적용되고 있으며 적절한 제어성능을 얻기 위하여 많은 시행착오에 의한 다양한 제어방법이 사용되고 있다. 그러나 산업현장, 플랜트의 변화 및 외란에 강인한 제어알고리즘을 선택하기가 매우 어려우며 많은 시행착오를 통하여 원하는 계수값을 얻어 낼 수 있다. 따라서 본 논문에서는 이러한 문제점을 해결하고 DC 서보모터의 제어성능을 향상시키기 위하여 유전 알고리즘을 적용함으로써 우수한 응답특성을 얻을 수 있었다.

• 펄프종이기술
• /
• 제32권1호
• /
• pp.57-64
• /
• 2000

As a method to reduce the sue of agricultural chemicals mulching with thin plastic films has been commonly practised for many years. Although use of plastic films for mulching is very effective in preventing herb growth it is almost impossible to remove all of the plastic films from the agricultural lands and the remaining films eventually contaminate the soils. Therefore, it is very imperative to develop a mulching material that decomposes completely to prevent soil pollution problems and to enhance the competitive edge of domestic agriculture. In this paper the possibilities of using strength resins for improving strength properties of mulch papers made from old corrugated containers were examined. Also mulch papers have been produced and applied for practical farming in upland as well as paddy field. Result showed that the usage of 0.7% of wet strength additives was effective for wet and dry strength of mulch paper. Changes of various process parameters including freeness, cationic demand, one pass retention, nitrogen content, etc. that occurred during trial production of mulch paper have been examined and discussed . It was found that paper mulching was very effective for weed control both in upland field and paddy filed.

• 현장농수산연구지
• /
• 제9권1호
• /
• pp.91-104
• /
• 2007

The special project was conducted at the cooperative farm where located at Yakjeon-ri Sukcheon-gun Pyeongannam-do, the Democratic People's Republic of Korea. This farm was firstly introduced a newly developed technology-"Bokto seeding technology" for rice cultivation from the Republic of Korea. Total acreage of rice paddy field cultivated by this technology was 800ha and the average yield was 7.17t/ha with paddy rice which was higher by 109.2% than that of the transplanting method for rice cultivation. In general rice disease was decreased at the Bokto seeded rice plant compared to the transplanted rice plant and root activity was higher in Bokto seeded rice. Optimum seeding amount was determined at rate of 90kg/ha in Pyeongdo 5(early ripening variety) and 110kg/ha at Pyeongdo 11(medium ripening variety) and Pyeongyang 43(late ripening variety), respectively. A recommended sowing time was within late April for late ripening variety like Pyeongyang 43, May 1-5 for medium ripening variety, and May 5-15 for early ripening variety.

• 한국화재소방학회논문지
• /
• 제24권3호
• /
• pp.113-118
• /
• 2010

소방방재로봇이 2009년 9월부터 대구시 산하 소방서에 배치되어 시범적으로 운용되고 있다. 소방관을 대상으로 심층면담과 설문 등을 통해 각종 문제점들과 기능 개선사항을 분석하여 현장 적응성, 실효성 있는 로봇의 개발방향을 제시하였다. 보조로봇은 조종 편의성을 높이고, 장애물 통과 및 이동성이 용이하도록 바퀴 성능을 우선적으로 개선하여야 하며, 필드로봇은 무게의 경량화와 조종 편의성 및 무선통신을 안정화 시켜야 되는 것으로 나타났다. 또한 시범중인 로봇에 대한 기능 만족도는 전반적으로 낮으며, 보조로봇에 대해서는 현장 투입의사가 8.4% 수준으로 미미하였다. 이에 소방방재로봇의 조기 상용화 및 산업의 발전을 위해서는 우선적으로 기능개선 및 현장에서의 사용 활성화가 이뤄져야 할 것이다.

• 식물병연구
• /
• 제10권2호
• /
• pp.105-111
• /
• 2004

마늘흑색썩음균핵병에 대한 국내재배 마늘의 품종저항성을 구명하기 위하여 발병에 관여하는 Sclerotium cepivorum과 대균핵을 형성하는 Sclerotium sp.에 대한 invitro clove inoculation법에 의한 균사생장과 균핵형성소요 일수 그리고 이병포장에서의 품종별 발병정도를 조사하였다. 마늘인편 절편상에서의 병원균의 생장과 균핵형성은 품종 또는 병원균간에 차이를 보였다. 대서종에서는 두 가지 병원균 모두 가장 높은 균사생장을 보였다. S. cepivorum과 Sclerotium sp.의 균핵은 고당종에서 가장 빠르게 형성되었고, 남도종에서 가장 늦게 형성되었다. 포장에서의 품종별 병 저항성에 있어서는 S. cepivorum에 대해서는 모든 마늘에서 이병주율이 50% 이상으로 시험 품종 모두 감수성인 것으로 판명되었으며, 난지형마늘에 비해 한지형마늘에서 발병이 적었다. Sclerotium sp.에 대해서는 난지형 마늘 모두 고도의 감수성이었고, 한지형마늘은 서산종, 단양종 그리고 예천종이 중도저항성이었으며 의성종은 저항성인 것으로 나타났다. 마늘의 품종저항성을 정량적으로 평가하기 위하여 병진전곡선을 1차 회귀직선화하여 얻은 초기발병치(intercept), 병진전속도 및 병진전곡선하면적(AUDPC)을 비교한 결과 초기발병과 병진전이 함께 고려된 AUDPC가 품종별 병저항성을 평가하는데 적당한 것으로 나타났다. In vitro 조건하에서의 균사생장 및 균핵형성과 포장에서의 역학지수(초기발병치, 최종발병치, 병진전속도, AUDPC)와의 상관관계를 조사한 결과, S. cepivorum에 대하여 균사생장과 최종발병치, 균사생장과 병진전속도간에는 정의상관을, 그리고 균핵형성과 역학지수간에는 부의 상관을 보였으나 5％ 수준에서 유의성은 없었다.