• 한국산림과학회지
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• 제110권2호
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• pp.217-232
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• 2021

본 연구는 목재수확방법에 따른 단목수확시스템과 전목수확시스템으로 구분하여 벌채부산물 수집 및 가공작업의 생산성과 비용을 산출하고, 생산된 목재칩의 연료 특성을 비교 분석하여 목재칩 등급을 분류하고 에너지 시설에 연료 조건이 적합한지를 검토하였다. 벌채부산물 목재칩의 시스템 생산성 및 총 비용은 단목이 1.6 Gwt/SMH, 89,865 won/Gwt이었고, 전목은 2.9 Gwt/SMH, 72,974 won/Gwt로 단목에 비해 목재칩 생산성이 1.3배 높았고, 비용은 18.7% 절감되었다. 벌채 부산물 목재칩은 국제표준과 국내기준으로 단목의 목재칩은 등급에 적합하지 않았지만 선별처리를 통해 품질이 A2와 2급으로 향상되었다. 전목은 선별전 목재칩이 국내기준 2급이었으나 국제표준에 적합하지 않았고, 선별처리를 통해 A2 등급으로 향상 되었다. 또한 에너지 시설을 대상으로 Plant A는 단목의 선별전을 제외한 모든 목재칩이 건조처리를 통해 이용가능하였고, 전목 선별전 목재칩이 99,408 won/Gwt으로 가장 비용이 낮았다. 별도의 건조처리가 요구되지 않은 Plant B, C, D는 전목 선별전 목재칩이 57,204 won/Gwt으로 가장 비용이 낮았다. 따라서 벌채부산물을 이용하기 위해 전목수확시스템의 적용과 목재칩 품질 향상을 통해 에너지 이용시설에 적합한 목재칩을 생산할 수 있을 것으로 판단된다.

• Journal of Biosystems Engineering
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• 제3권1호
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• pp.33-46
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• 1978

To get the goal of self-supply of food grain, improvement of post-harvest grain operations in rural area is under consideration as an important task of agriculture in Korea. This is study is focused on elimination of losses and deteriorations of grain and reduction of labour requirements and funds for post-harvest grain operations. The purpose of this study are presentation of basic data referring to conventional post-harvest grain operations in rural area and suggestion of improving methods for the operations, and also finding out reasonable operating processes of the operations. The result of this study are follows; 1. Grain drying in-the-filed which is performed before threshing has major factors of grain loss during drying, and so should be restrained as possible. Combine harvesting system is recommended among other king of mechanized harvesting systems for restraining in-the-field drying and securing available labors for drying. 2. It is predicted that mechanical grain drying could be prevalent when combine harvesting is taken place. Recommended grain drier for pre-combine harvesting system and for combine harvesting system is batch-type drier and circulating -type drier, respectively. 3. As existing farm storages for grain have insufficient spaces and offer poor conditions for grain storing , it is greatly needed to build up new storage which store only grains. And it is concluded that storing grain in community common storages in desirable. 4. Power supplying system for milling machinery in local milling plants, that a large capacity prime mover supplies power to 4 to 6 kinds of milling machinery simultaeously, should be converted to a system of several small capacity prime movers supplying power to each machiner y for the purpose of reducing extra consumption of energy. 5. Governmental grain, of which Korean farms produced, should be milled and stored in the local milling plant successively for the purpose of reducing transportation fee and stroing facilities. 6. Furture post-havest grain operations-drying, storing and milling should be periormed successively in he community common plant. And average optimum processing capacity of the plant is estimated about 300 metric ton of grain every year.

• 한국자원식물학회지
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• 제20권2호
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• pp.125-128
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• 2007

최대 엽 수량 증대를 위한 1회 수확부위를 구명하여 안정생산을 도모코자 지제부 수확 등 4처리를 두어 2002년부터 3년간 시험한 결과, 경엽과 근경 생육은 1회 수확높이가 짧을수록 양호한 경향이었으나, 분얼수는 길수록 많았으며, 근경의 분포는 직경 5mm 이하가 58% 정도며, 수확높이가 짧을수록 굵은 근경의 비율이 높은 경향이었다. 경엽수량은 지상부에서 수확높이가 짧을수록 많아 5cm수확(관행) 10a당 292kg 대비 지제부 수확에서 15% 증수되었고, 경엽 수확 후 건조 전 조제시간은 수확높이가 낮을수록 단축되었으며, 5cm 수확(관행) 대비 지제부 수확에서 30% 절감되었다.

• 농업과학연구
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• 제45권4호
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• pp.623-634
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• 2018

This experiment was conducted to determine the effects of the pre- and post-harvest variable factors on the processed product of kimchi cabbage. Two kimchi cabbage cultivars, namely 'Chungwang' and 'Dongpung,' were grown in a field and under a plastic greenhouse condition and stored at $5^{\circ}C$ after harvesting with and without low-density polyethylene (LDPE) film packaging. Growths were determined after harvesting while salting characteristics were determined after the processing and storage. The results show that the height, weight and leaf thickness were higher in kimchi cabbages grown in the greenhouse than those grown in the field. The plastic house culture increased the kimchi cabbage growth of the head weight, head height and leaf thickness compared with that of the open field culture. However, the osmolality and firmness were higher in the outdoor cultivated kimchi cabbages. Kimchi cabbage packed in film covered sacks and stored at $5^{\circ}C$ showed lower weight loss than unpacked cabbages during storage. Salt concentration and pH were also affected by the different pre- and post-harvest factors after salting the kimchi cabbages. Salt concentrations of the kimchi cabbage were influenced by various factors such as the cultivars, cultivation methods and storage covering. Though the present findings showed a limited difference in salt concentration and pH between the cultivars of kimchi cabbages, this study suggests that there is a relationship between processed agricultural products and their pre- and post-harvest methods.

• Journal of Information Processing Systems
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• 제15권4호
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• pp.833-852
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• 2019

In real time applications, due to their effective cost and small size, wireless networks play an important role in receiving particular data and transmitting it to a base station for analysis, a process that can be easily deployed. Due to various internal and external factors, networks can change dynamically, which impacts the localisation of nodes, delays, routing mechanisms, geographical coverage, cross-layer design, the quality of links, fault detection, and quality of service, among others. Conventional methods were programmed, for static networks which made it difficult for networks to respond dynamically. Here, machine learning strategies can be applied for dynamic networks effecting self-learning and developing tools to react quickly and efficiently, with less human intervention and reprogramming. In this paper, we present a wireless networks survey based on different machine learning algorithms and network lifetime parameters, and include the advantages and drawbacks of such a system. Furthermore, we present learning algorithms and techniques for congestion, synchronisation, energy harvesting, and for scheduling mobile sinks. Finally, we present a statistical evaluation of the survey, the motive for choosing specific techniques to deal with wireless network problems, and a brief discussion on the challenges inherent in this area of research.

• 혜화의학회지
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• 제13권2호
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• pp.179-186
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• 2004

Now many sustitution and false articles is used in korea instead of gegen. To use gegen correctly, we will make a quilitative certificational plan of gegen to investigate all of lieraturea, records and documents. And we could reach conclusions as folloews. 1) Source As a source of gegen, we think all of Pueraria lobata Ohwi and Pueraria thomsonii Benth can be used in korea and china. 2) Harvesting time. According to a data, content of effective components is high when harvested in January and February. Though there is no problem because domestic harvesting and working time is between January and February, we think it need to sure well-founded datas. 3) Standars of goods According to cutting methods, gegen divide into 'jiaogegen' and 'piangegen' from users So there is no problem at cutting methods because it is not a affective factor. 4) Processing A processing method is a best important case in express quility of herb. According to a data, effective components of peeled gegen is much less than that of non-peeled geeen. A tested samples is non-peeled gegen at a researh, they received suitable judgments in all of items. Especially we got a result content of puerarin is much more than 2.0%. But they were not washed in water, it is a problem that there is bleaching effect by almost drying at a briquat. So a processing method is to wash in water with unavoidable turnning to brown, to prevent this grgrn must be dried in bulk at low temporature. And we think that content of puerarin must be looked upward.

• 한국약용작물학회지
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• 제7권3호
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• pp.172-176
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• 1999

길경의 품질평가 기준으로 활용하고 있는 crude saponin 함량 변화를 밝히고 고품질 약재생산 및 가공을 위한 기초자료를 얻고자 생육년수, 부위, 수확시기, 및 건조방법별로 조사포닌 함량을 분석한 결과는 다음과 같다. Crude saponin 함량은 생육년수가 증가함에 따라 점점 감소하였다. 부위별로는 미부에서 2.74%로 두부 1.65%보다 1.6배 높았으며, 외피가 내심보다 1.8배 높았다. 수확시기별로는 3월과 12월에 수확했을 때가 각각 2.82, 2.74%이었으며 6월과 9월은 각각 2.12, 2.09%이었다. 건조방법별로는 증건했을 때 가 1.65%로 가장 낮았고 양건, 음건, 열풍건 및 원적외선 건조에서는 차이가 없었다.

• 한국식품조리과학회지
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• 제4권1호
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• pp.47-52
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• 1988

녹차의 품종, 채엽시기, 가공방법별에 따라 13종류의 한국산 녹차시료를 조제하고 이들 시료의 이화학적 성질을 측정한 결과는 다음과 같다. 1. 수활, 회분, 가용성 고형분 및 조지방 함량은 대체적으로 품종, 차엽의 채취시기 및 가공방법의 상위에 따른 큰 차이점은 나타나지 않았지만 조단백질의 경우에서는 삽목 Yabukida 품종 1번 차의 볶음과 찐 것에서 각각 30.8%, 31.3%이던 것이 2, 3번차로 갈수록 점차 감소하여 4번차의 경우에서는 각각 18.8%, 16.0% 이었다. 이러한 경향은 다른 품종에서도 유사한 경향을 나타내었다. 품종별에 따른 변화도 크게 나타났다. 조섬유에서는 채엽시기에 따라 증가하는 경향을 나타내었다. 2. 표면색도는 볶음 차보다 찐 차가 보다 밝은 녹황색을 띄며 채엽시기가 늦을수록 밝은 황색을 나타내었다. 또한 클로로필함량은 찐 차의 경우가 볶은 차보다 높았고, 채엽시기에 따라 감소의 경향을 보였으나 삽목 Yabukida 4번 차의 경우에서는 증가하였다. 3. 탄닌의 함량은 볶음의 경우 채엽시기가 늦을수륵 증가하였지만 찐 차의 경우 그런 경향이 나타나지 않았으며 theaflavin과 thearubigin 함량은 평균하여 각각 0.07% 및 2.27%이었고 산화중합물비는 평균 0.22이었다. 4. Methylxanthine류에서는 caffeine이 주성분으로 94∼98%를 차지하였으며 볶음차의 caffeine 함량이 높았다. 베니호마래의 caffeine 함량은 다른 품종보다 낮았다. 5. 녹차의 환원당은 0.1% 내외로 거의 일정하였으며 유리당의 경우 삽목 Yabukida가 다른 품종에 비해서 sucrose 함량이 높게 나타났다. 6. 녹차중의 유기산은 succinic, malic, shikimic, citric, quinic, gallic, oxalic 및 malonic acid의 8종류이었으며 이중 quinic acid의 함량이 높았다. 삽목 Yabukida 품종에서는 채엽시기가 빠른 녹차에서는 malic acid 함량이 매우 낮은 반면 oxalic acid는 채엽시기가 늦을수록 감소하여 미량으로 검지되었다.

• Journal of Information Processing Systems
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• 제17권6호
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• pp.1127-1137
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• 2021

Given the different effects of agricultural mechanization on various stages of wheat planting in Henan, this article selects 78 observation samples from Henan, a major wheat-growing province. It uses different research methods (multiple linear regression, social network analysis model, multi-layer sensory nerves network) to conduct a comparative study, and the calculation results of the model show that the experimental results have a strong convergence and consistency. Agricultural mechanization services have significant effects on the three stages of wheat planting: harvesting, plowing and sowing. A higher degree of mechanized service in several stages can reduce the cost of growing wheat on family farms.

• 한국자원식물학회지
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• 제7권1호
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• pp.23-27
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• 1994

The growing condition and the point at issue were investigated for utilization as a fundamental data of the Boxthorn research in the growing farm household, which was chief producing district of Box-thorn in Chongyang, Chungmam province. The results were summarized as follow'; Lycium fruit wasproduced 445M/. in the 170.4ha. In practical cultivation, major numbers of decapitation were threetimes,, and planting distance was dense planting, and also amount of applied fertilizer was beyondbasic-fertilizer level and number of split application was abundant.Numbers of harvesting were six-ten times, and many labor was requiremented.The issues in cultivation were development of processing technique, supplement of varieties whichhave disease tolerance, superior quality and high yielding, improving of cultivation methods for laborsaving and magnification of demand.