• 한국자원식물학회지
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• 제27권2호
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• pp.119-124
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• 2014

본 연구에서는 수확시기에 따른 과실품질과 폴리페놀화합물인 에피카테킨, 카테킨, 레스베라트롤, 쿼세틴 함량에 미치는 영향을 구명하고자 본 연구를 실시하였다. 포도의 특성과 품질은 수확 시기에 관계없이 만기 수확구에서 과실특성이 향상되었고, 당도는 높고 산도는 낮았다. 명도(L)는 '캠벨얼리'와 '자옥'에서 적색도(a)는 '자옥'에서 만기 수확구에서 높았으며, 황색도(b)는 '자옥'에서 수확시기에 따라 높은 차이를 보였다. 에피카테킨 중 EC는 모두 만기 수확구에서 높았으며, '자옥' 품종은 EGC와, EC가 수확시기에 따라 함량 차이가 뚜렷하였으며, 품종에 따라 에피카테킨 조성이 달랐다. 카테킨, 레스베라스톨은 '캠벨얼리'와 'M.B.A'는 만기 수확구에서, '자옥'은 조기 수확구에서 높았으며, 쿼세틴은 '캠벨얼리'는 조기 수확구에서 '자옥'과 'M.B.A'는 만기 수확구에 높았다. 품종별로는 '캠벨얼리'가 수확시기와 관계없이 '자옥'과 'M.B.A'에 비하여 카테킨과 레스베라스톨이 높았다.

• 한국토양비료학회지
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• 제38권4호
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• pp.202-210
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• 2005

정밀 농업 시행에 있어서 포장 변이성에 대한 이해가 필수적이므로, 직파 재배 논에서 포장 변이성 조사와 토양 검정 결과에 다른 질소 변량 시비에 대한 현장 시험이 전북 김제의 직파 재배 논 시험 포장과 농가 시범 포장에서 이루어졌다. $35m{\times}112m$ 단위 포장에서 10 m 간격의 방격형으로 표토의 토양 시료를 채취하여 분석하였다. 토양 유기물, 유효 인산 및 규산, 그리고 치환성 칼륨 등에 대한 분석이 이루어졌다. 시험 포장에 대한 토양 검정 결과에 의해 다수확과 저투입 농업을 위한 질소 시비 추천량을 계산하여 그 분포도를 작성하였다. 2001년과 2002년의 시험 포장에서의 질소 변량 시험을 토대로, 2003년에는 농가 포장 3개를 선정하여 저투입 질소 시비량을 기준으로 질소 변량 시비에 대한 농가 실증 시험을 하였고, 경제성을 분석하였다. 변량 시비에 의해 수량 중가 및 수량 변이 감소 효과를 알 수 있었다. 변량 시비에 의한 수량 증가와 시비량 절감에도 불구하고, 토양 검정에 소요되는 비용이 절감 비용을 초과하였다.

• 한국인터넷방송통신학회논문지
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• 제15권2호
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• pp.239-244
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• 2015

SNS(Social Networking Service)와 쇼핑몰을 결합하면 오프라인 거래에서처럼 단골 관계를 형성할 수 있다. 농산물 직거래의 예를 들면, 소비자는 자신의 SNS 홈에서 기존의 단골 관계인 생산자의 소식(파종, 농사, 수확, 신상품 등)을 타임라인에서 확인하여 필요한 상품을 원클릭(one click)으로 구매할 수 있고 생산자는 소비자에게 뉴스 및 할인 등의 정보를 제공하여 단골로 만드는 고객 관리가 가능하다. 이처럼 SNS의 인맥 마케팅 기능에 더하여 시스템은 생산자의 판매 물품을 자동 분류한 카테고리로 소비자의 SNS 홈 페이지에 쇼핑물의 기능을 제공하여 소비자가 원하는 상품을 검색하고 구매할 수 있으며 구매는 자동으로 소비자와 생산자를 단골관계로 이어준다. 구매자는 구매한 상품에 대한 추천 및 리뷰 작성을 통해 기존의 리뷰 재배포도 가능하며 서로 알지 못하는 구매자 간의 소통을 가능하게 한다는 것이 이 시스템의 가장 큰 특징이다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.287.1-287.1
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• 2013

The Isolation of few-layered transition metal dichalcogenides has mainly been performed by mechanical and chemical exfoliation with very low yields. in particular, the two-dimensional layer of molybdenum disulfide (MoS2) has recently attracted much interest due to its direct-gap property and potential application in optoelectronics and energy harvesting. However, the synthetic approach to obtain high-quality and large-area MoS2 atomic thin layers is still rare. In this account, a controlled thermal reductionsulfurization method is used to synthesize large-MoOx thin films are first deposited on Si/SiO2 substrates, which are then sulfurized (under vacuum) at high temperatures. Samples with different thicknesses have been analyzed by Raman spectroscopy and TEM, and their photoluminescence properties have been evaluated. We demonstrated the presence of single-, bi-, and few-layered MoS2 on as-grown samples. It is well known that the electronic structure of these materials is very sensitive to the number of layer, ranging from indirect band gap semiconductor in the bulk phase to direct band gap semiconductor in monolayers. This synthetic approach is simple, scalable, and applicable to other transition metal dichalcogenides. Meanwhile, the obtained MoS2 films are transferable to arbitrary substrates, providing great opportunities to make layered composites by stacking various atomically thin layers.

• ALGAE
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• 제26권3호
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• pp.253-263
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• 2011

Phenotypic plasticity was examined in the economically and ecologically important brown alga Ascophyllum nodosum in southwestern Nova Scotia, considering specifically how nutrient loading affected its vegetative and reproductive features. To determine this, we examined morphometric changes in A. nodosum from two sites receiving direct effluent impacts from a land-based finfish aquaculture facility and from two control sites, approximately 2 km away from the aquaculture facility in opposite directions. Fronds from test sites were significantly younger than from control sites (5 y vs. 8 y); however, fronds from farm sites were significantly larger (219 g vs. 90 g) because of their higher growth rates. Thalli from farm sites had greater reproductive potential, as shown by numbers of receptacle initials (797 initials vs. 281 initials). These results suggest limited nutrient inflows from land-based aquaculture may positively affect adjacent Ascophyllum populations by inducing higher growth rates. We conclude that the coordination of effluent management from land-based aquaculture with natural resource harvesting of A. nodosum may be beneficial. Further study is necessary to determine the limits of nutrient loading for this potentially beneficial outcome.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권1호
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• pp.20-39
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• 2020

This paper considers a downlink multi-carrier cooperative non-orthogonal multiple access (NOMA) transmission, where no direct link exists between the far user and the base station (BS), and the communication between them only relies on the assist of the near user. Firstly, the BS sends a superimposed signal of the far and the near user to the near user, and then the near user adopts simultaneous wireless information and power transfer (SWIPT) to split the received superimposed signal into two portions for energy harvesting and information decoding respectively. Afterwards, the near user forwards the signal of the far user by utilizing the harvested energy. A minimum data is required to ensure the quality of service (QoS) of the far user. We jointly optimize power allocation, subcarrier allocation, time allocation, the power allocation (PA) coefficient and the power splitting (PS) ratio to maximize the number of data bits received at the near user under the energy causality constraint, the minimum data constraint and the transmission power constraint. The block-coordinate descent method and the Lagrange duality method are used to obtain a suboptimal solution of this optimization problem. In the final simulation results, the superiority of the proposed NOMA scheme is confirmed compared with the benchmark NOMA schemes and the orthogonal multiple access (OMA) scheme.

• Journal of Biosystems Engineering
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• 제40권4호
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• pp.314-319
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• 2015

Purpose: The ratio of straw to grain mass as a function of cutting height affects combine efficiency and power consumption and is an important input parameter to combine simulation models. An equation was developed to predict straw to grain ratios for wheat as a function of cutting height. Methods: Two mass functions, one for straw and one for grain, were developed using regression techniques and measured data collected in west Texas during the summer, and used to predict the straw to grain ratio. Results: Three equations were developed to facilitate the simulation of a combine during wheat harvest. Two mass functions, one for straw and one for grain, were also developed; a quadratic equation describes the straw mass with an $R^2$ of 0.992. An S-shaped curve describes the mass function for grain with an $R^2$ of 0.957. An equation for straw to grain ratio of wheat was developed as a function of cutting height. The straw to grain ratio has an $R^2$ value of 0.947. Conclusions: In all cases, the equations had $R^2$ values above 0.94 and were significant at the 99.9 percent probability level (alpha = 0.001). Although all three equations are useful, the grain mass and straw to grain ratio equations will have direct application in combine simulation models.

• Archives of Plastic Surgery
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• 제34권6호
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• pp.785-791
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• 2007

Purpose: Paraffin has been used to augment depressed nasal contour for many years by illegally. Reported complications of nasal paraffinoma were skin thinning, displacement of nasal profile, redness, chronic inflammation and malignant change to skin cancer. The current authors report results of the secondary rhinoplasty after excision of nasal paraffinoma. Methods: Through the open rhinoplasty incision, paraffinoma was removed under direct vision. Saline irrigation and meticulous hemostasis were performed. Simultaneously, the secondary depressed nasal deformity was corrected with autogenous dermofat graft harvested from inferior gluteal fold. The dermofat was fixed to the nasofrontal area with bolster suture, and the interdormal area of the tip. Results: A total of 13 patients underwent secondary augmentation with autogenous dermofat graft after removal of paraffinoma from 2000 to 2004. The mean follow-up period was 15 months. There were no postoperative complications. All patients were satisfied with their surgical results. However, there were 10 to 20 percent resorption of the grafted dermofat. Conclusion: It is suggest that autogenous dermofat be one of good materials for the correction of the secondary deformity after removal of nasal paraffinoma. In addition, autogenous dermofat graft presented easy harvesting and manipulation for transfer, high survival rate by firm fixation to the recipient site and stable surgical results.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.538-545
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• 1993

Individual farming involving small land parcel (0.5 to 1.0ha) is declining because it is uneconomic and unable to incorporate modern technological innovation to improve its production efficiency. A centrally managed medium scale mechanised rice share farming was implemented at Permatang Pauh, Sebeerang Perai, Malaysia in 1988-1991 for eight seasons on a contiguous 57 ha rice land rented from 100 owners. Ten participants were chosen to participate in this project which perpetuated from revolving fund of MR 165.000. The objective of the project was to overcome problem of production efficiency and to provide a stable income to farmers operating on a medium and full time basis. Mechanisation was given prime emphasis to optime and reduce labour requirement and meeting the targeted crop scheduling. Direct seeding and mechanical transplanting methods of crop establishment were adopted. Land preparations, crop establishment and crop care were done using machineries purchased by the group. Selected participants were trained to operate machineries which composed 2 and 4 wheel tractors, mechanical transplanters, motorised seeders and sprayers. Harvesting and transportation of rice to the mills were done on contractual basis using combine harvesters and bulk handling via 3-4 ton lorries respectively. The net clean yield (less 10-20 percent deduction at rice mills) obtained in such project has contributed to stabilise the production and income of participating farmers.

• 상하수도학회지
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• 제28권1호
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• pp.111-124
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• 2014

Decentralized water supply systems, treating the water in users'vicinity, cutting down the distribution system, utilizing the alternative water resources(rainwater harvesting, water reclamation and reuse and so on.) and saving energy and other resources, could be categorized into POU(Point-Of-Use), POE(Point-Of-Entry) and community small scale system. From the literature review, we could thought that decentralized water supply system and hybrid system(integrating centralized and decentralized water supply system within urban water management) might have strengthening comparative advantages to centralized system with respect to: (1) water security, (2) sustainability, (3) economical affordability. Even though it is difficult to derive and quantify direct benefit advantages from decentralized and hybrid system in comparison with centralized system, (1) operational cost reduction, (2) assurance for safe and stability water supply and (3) greenhouse gas reduction can be expected from successful establishment of the former.