• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.638-647
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• 1996

Robot manipulators for harvesting fruits must be controlled to track the desired path of end-effector to avoid obstacles under the consideration of collision free area and safety path. This paper presents a robot path control algorithm to secure a collision free area with the recognition of work environments. The flexible space, which does not damage fruits or branches of tree due to their flexibility and physical properties , extends the workspace. Now the task is to control robot path in the extended workspace with the consideration of collision avoidance and velocity limitation at the time of collision concurrently. The feasibility and effectiveness of the new algorithm for redundant manipulators were tested through simulations of a redundant manipulator for different joint velocities.

• Journal of Biosystems Engineering
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• 제31권2호
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• pp.95-101
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• 2006

Present chemical application system using a power sprayer has been a labor intensive, ineffective and shirking task in farming. Therefore, a small RF controlled (unmanned) helicopter was suggested to replace the conventional spray system. The aerial application using the unmanned helicopter has been already utilized in Japan, where total area applied up to 704,000 ha in 2005. In this article, the status and cost analysis on the unmanned agricultural helicopter were studied. The aerial application using the agricultural helicopter helps precise and timely spraying and reduces labor intensity and pollution. The field capacity of the helicopter was found to be 60-70 ha a day. The break even point was estimated near the operating area of 750 ha annum. The development of an agricultural helicopter was necessary for taking advantages of both technique and economy.

• 농업과학연구
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• 제47권2호
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• pp.205-217
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• 2020

In this study, a deep learning-based tillage boundary detection method for autonomous tillage by a tractor was developed, which consisted of image cropping, object classification, area segmentation, and boundary detection methods. Full HD (1920 × 1080) images were obtained using a RGB camera installed on the hood of a tractor and were cropped to 112 × 112 size images to generate a dataset for training the classification model. The classification model was constructed based on convolutional neural networks, and the path boundary was detected using a probability map, which was generated by the integration of softmax outputs. The results show that the F1-score of the classification was approximately 0.91, and it had a similar performance as the deep learning-based classification task in the agriculture field. The path boundary was determined with edge detection and the Hough transform, and it was compared to the actual path boundary. The average lateral error was approximately 11.4 cm, and the average angle error was approximately 8.9°. The proposed technique can perform as well as other approaches; however, it only needs low cost memory to execute the process unlike other deep learning-based approaches. It is possible that an autonomous farm robot can be easily developed with this proposed technique using a simple hardware configuration.

• 한국농촌생활과학회지
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• 제5권2호
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• pp.199-205
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• 1994

In the process of industralization, Korea rural aged have played great role. By investing, educating, and supporting their brothers and children, rural aged transferred their economic surplus to non agricultural fields and urban areas. But they did not prepare for their old age. So in every agricultural policy implementation, special concern should be taken to rural aged. The rural home extension should be the major institution for the rural aged. This paper was carried out to find the direction and the policy task of rural guidance project for rural aged. This paper suggested the needs of support for the aged in family, economic status and income, and leisure. To support the aged in family, the rural home extension should teach them how to make good relationship between Mother-in-law and daughter in law and special support to families which composed of only rural aged(no children). The rural home extension program should provide special policy for job opportunity creation for the rural aged. The rural home extension should also make educational programs for useful utilization of leisure time of rural aged. The rural home extension should make major roles in rural aged related policy. So rural home extension workers are well trained in gerontology and more related information should be provided.

• 농촌의학ㆍ지역보건
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• 제24권1호
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• pp.35-47
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• 1999

노인에서 처방약 복용에 대한 불순응의 문제는 의학적으로 심각한 문제의 발생과 경제적인 손실을 가져오게 된다. 이 연구는 1996년 7월 24 일부터 8월 13일 사이에 경상북도 김천시 금릉군에 거주하는 60세 이상의 농촌 노인을 대상으로 이루어진 단면적인 면접조사이다. 노인에서의 비고이적인 약물복용 불순응의 원인이 되는 약물복용 능력의 실태를 파악하고, 약물 복용능력과 건강상태, 일상적 생활 활동, 가족적 지지, 그리고 인지기능을 비롯한 다양한 변수, 일반적 특성 등과의 관련성을 조사 분석함으로써 약물 복용 실행능력을 예측할 수 있는 예측자를 찾고자 하였다. 현재 복용하고 있는 약물이 있다고 답한 사람은 48.8%였다. 93%가 혼자서 정확한 시간에, 정확한 용량으로 복용할 수 있다고 답하였고, 6%가 약간의 도움이 필요하다고 하거나 혼자 복용할 수 없다고 답하였다. 약물 복용 수행능력과 일반적 특성 및 연구 변수들간의 차이에는 연령과 교육수준, IADL, MMSE-K가 혼자서 독립적으로 복용할 수 없는 군 사이에 유의한 차이가 있었으며, 상관분석에는 ADL, IADL, MMSE-K, BDI가 유의한 상관이 있었다. 단일변수분석과 상관분석에서 약물 복용 능력과 유의한 관련성을 보인 변수를 선택하여 투입한 로지스틱 회귀분석에서 IADL과 성이 최종적으로 선택되었다. 다른 건강수준 측정법 보다 수단적 일상생활 정도는 약물복용 수행능력에 더 민감한 예측자로의 역할이 기대되므로 투약관리와 약물 복용 수행 능력에 대한 정신적 상태를 평가하는 고식적 방법에 추가정보를 제공할 수 있을것으로 판단된다. 추후 약물복용 순응도의 다면적인 면을 고려한 연구가 입 퇴원환자를 중심으로 한 정확한 투약 순응도와 규모 파악, 이를 향상시킬 수 있는 구체적인 방안을 모색하는 방향을 중재 연구와 인지기능 및 운동기등 등의 정신 및 신체조건에 따른 약물 복용 순응도에 초점이 맞춘 다양하고 집중적인 연구자 필요할 것으로 생각된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제22권5호
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• pp.13-22
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• 2017

Accurate assessment of agricultural groundwater usage is an essential task to cope with drought that occurs irregularly in time and location. In this study, the agricultural groundwater usage was calculated in nationwide public wells (1,386 bedrock wells) during 5-year period (2010-2014) by using electric power consumption and well specification data. National average of agricultural groundwater usage per each well was estimated as $66.2m^3/day$, corresponding to 21.6% of total permitted volume of groundwater in each well. Chungcheong Nam-do had the highest usage with 38-55.6%. The value increased to 58.1% when the total permitted volume was based upon the supply standard against drought, and the value reached 100% in Chungcheong Nam-do. In Ganghwa distirct that suffered from severe drought in recent years, the average groundwater usage was 61.4%. In 2014, when the drought was the most severe with 45% precipitation of the average annual rainfall, the nationwide usage was turned out to be 25.6%, indicating about 4% higher than average agricultural groundwater usage 21.6%. Therefore, the quantitative assessment of groundwater usage in this study signifies that adequate use of groundwater is crucial to cope with agricultural drought.

• Genomics & Informatics
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• 제19권3호
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• pp.27.1-27.4
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• 2021

Due to the rapid evolution of high-throughput technologies, a tremendous amount of data is being produced in the biological domain, which poses a challenging task for information extraction and natural language understanding. Biological named entity recognition (NER) and named entity normalisation (NEN) are two common tasks aiming at identifying and linking biologically important entities such as genes or gene products mentioned in the literature to biological databases. In this paper, we present an updated version of OryzaGP, a gene and protein dataset for rice species created to help natural language processing (NLP) tools in processing NER and NEN tasks. To create the dataset, we selected more than 15,000 abstracts associated with articles previously curated for rice genes. We developed four dictionaries of gene and protein names associated with database identifiers. We used these dictionaries to annotate the dataset. We also annotated the dataset using pretrained NLP models. Finally, we analysed the annotation results and discussed how to improve OryzaGP.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.850-858
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• 1993

Germinatin and early growth of tobacco seedlings in trays containing many cells is increasing in popularity . Since 100 % germination is not likely , a major problem is to locate and replace the content of those cells which contain either no seedling or a stunted seedling with a plug containing a viable seedling. Empty cells and seedlings of poor quality take up valuable space in a greenhouse. They may also cause difficulty when transplanting seedlings into the field. Robotic technology, including the implementation of computer vision, appears to be an attractive alternative to the use of manual labor for accomplishing this task. Operating AGBOT, short for Agricultural ROBOT, involved four steps : (1) capturing the image, (2) processing the image, (3) moving the manipulator, (4) working the gripper. This research seedlings within a cell-grown environment. the configuration of the cell-grown seedling environment dictated the design of a Cartesian robot suitable for working ov r a flat plane. Experiments of AGBOT performance in transferring large seedlings produced trays which were more than 98% survived one week after transfer. In general , the system generated much better than expected.

• Journal of Biosystems Engineering
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• 제28권6호
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• pp.511-516
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• 2003

컴퓨터 시각 기술은 다양한 농작업 생력화에 있어 핵심적인 역할을 해왔다. 비록 컴퓨터 시각 기술이 광범위한 분야에 성공적으로 적용되고 있다고는 하지만 인간의 시각을 통한 인지 능력에 비하면 현재의 컴퓨터 시각 기술은 여전히 매우 미흡한 수준에 있다고 하겠다. 특히, 작업환경이 비구조적이고 가변적인 농작업 환경 하에서의 작업의 생력화는 이러한 기술적 문제를 극복하는 것이 작업의 성패를 좌우하게 된다. 본 논문에서는 원격작업 개념을 도입하여 작업자와 작업기계간의 호환적인 인터페이스를 구축하고 컴퓨터와 인간의 혼합형 의사결정 시스템을 구현하여 기존의 컴퓨터 시각 기술이 갖는 인지 처리 능력의 한계를 극복하는 시스템을 제안하였다. 시설재배에 요구되는 전정, 관수, 방제, 제초, 수확, 운반 등과 같은 다양한 작업들은 작업 대상체에 대한 인식을 바탕으로 수행된다. 특히 가변적인 자연 조명 환경 하에서 수박과 줄기 그리고 잎이 혼재되어 있는 재배현장의 영상으로부터 수박을 추출하여 그 위치 좌표를 산출하는 작업은 기술적으로 매우 어려운 작업이며 수박이 잎과 줄기로 덮혀 있는 경우 더욱 어려워진다. 제안한 개념을 구현하기 위하여 무선으로 수신되는 재배 현장의 수박 영상으로부터 수박을 인식하도록 하였다. 개발한 시스템은 작업자(농민), 컴퓨터 그리고 자동화 작업설비가 상대적으로 수월성을 갖는 기능을 중심으로 역할을 분담하도록 구축하였다 개발 시스템은 크게 무선원격 모니터링 및 작업제어 모듈, 무선원격 영상 획득 및 데이터 송수신 모듈, 작업자와 컴퓨터간의 인터페이스 모듈로 구성하였다 작업자는 RF 송수신 모듈을 통하여 무선으로 획득되어 터치 스크린에 보여지는 영상을 통하여 작업 지시를 하게 되고 이 작업 지시로부터 컴퓨터는 국부 영상처리 시퀀스를 통하여 수박을 추출하고 위치를 산출하게 된다. 개발한 인터페이스 시스템은 가변적이고 복잡한 작업 환경하에서 작업 대상체의 정보를 실시간으로 성공적으로 추출하였다. 제안한 원격작업 인터페이스 시스템은 다양한 생물생산 작업의 생력화를 촉진하는 중심적 역할을 할 것으로 기대된다.

• Agricultural and Biosystems Engineering
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• 제4권2호
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• pp.50-57
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• 2003

This study was conducted to develop software which provides automatic site-specific field data acquisition, data processing, data mapping and management for precision agriculture. The developed software supports acquisition and processing of both digital and analog data streams. The architecture was object-oriented and each component in the architecture was developed as a separate class. In precision agriculture research, the laborious task of manual ground-truth data collection will be avoided using the developed software. In addition, gathering high-density data eliminates the need for interpolation of values for un-sampled areas. This software shows good potential for expansion and compatibility for variable-rate-application (VRA). The FIM (Field Information Management) computer program provides the user with an easy-to-follow process for field information management for precision agriculture.