• Agribusiness and Information Management
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• 제9권1호
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• pp.7-17
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• 2017

Agricultural water management has gained enormous attention in the developing world to alleviate poverty, reduce hunger and conserve ecosystems in small-scale production systems of resource-poor farmers. The story of food security in the $21^{st}$ century in India is likely t o be closely linked to the story of water security. Today, the water resource is under severe threat. The past experiences in India in general and in Andhra Pradesh in particular, indicated inappropriate management of irrigation has led to severe problems like excessive water depletion, reduction in water quality, water logging, salinization, marked reduction in the annual discharge of some of the rivers, lowering of ground water tables due to pumping at unsustainable rates, intrusion of salt water in some coastal areas etc. Considering the importance of irrigation water resource efficiency, Krishna Western Delta (KWD) of Andhra Pradesh was purposively selected for this in depth study, as the farming community in this area are severely affected due to severe soil salinity and water logging problems and hence, adoption of different water saving crop production technologies deserve special mention. It is quite disappointing that, canals, tube wells and filter points and other wells could not contribute much to the irrigated area in KWD. Due to less contribution from these sources, the net area irrigated also showed declining growth at a rate of -6.15 per cent. Regarding paddy production, both SRI and semi-dry cultivation technologies involves less irrigation cost (Rs. 2475.21/ha and Rs. 3248.15/ha respectively) when compared to transplanted technology (Rs. 4321.58/ha). The share of irrigation cost in Total Operational Cost (TOC) was highest for transplanted technology of paddy (11.06%) followed by semi-dry technology (10.85%) and SRI technology (6.21%). The increased yield and declined cost of cultivation of paddy in SRI and semi-dry production technologies respectively were mainly responsible for the low cost of production of paddy in SRI (Rs. 495.22/qtl) and semi-dry (Rs. 532.81/qtl) technologies over transplanted technology (Rs. 574.93/qtl). This clearly indicates that, by less water usage, paddy returns can be boosted by adopting SRI and semi-dry production technologies. Both the system-level and field-level interventions should be addressed to solve the issues/problems of water management. The enabling environment, institutional roles and functions and management instruments are posing favourable picture for executing the water management interventions in the State of Andhra Pradesh in general and in KWD in particular. This facilitates the farming community to harvest good crop per unit of water resource used in the production programme. To achieve better results, the Farmers' Organizations, Water Users Associations, Department of Irrigation etc., will have to aim at improving productivity per unit of water drop used and this must be supported through system-wide enhancement of water delivery systems and decision support tools to assist farmers in optimizing the allocation of limited water among crops, selection of crops based on farming situations, and adoption of appropriate alternative crops in drought years.

• 한국콘텐츠학회논문지
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• 제13권4호
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• pp.281-289
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• 2013

최근 국내 임상시험의 양적 증가와 더불어, 임상시험 자료를 효율적으로 관리할 수 있는 Electronic Data Capture(EDC) 시스템의 도입 요구가 증가하고 있다. 이에 따라 식품의약품안전청에서는 '임상시험 전자 자료 처리 및 관리를 위한 가이드라인'을 발표하였다. 이는 향후 국내 임상시험 전자 자료 관리에 관한 법률 제정을 위한 기초가 될 것으로 기대한다. 이 연구에서는 국내 임상시험 관련 기관인 병원과 임상시험 수탁기관(CRO), 그리고 제약회사에서의 EDC 시스템 이용 현황과 관계자들이 인식하는 가이드라인 및 전자 자료 표준의 중요성 및 적용 용이성과 이해도를 조사하였다. 국내 임상시험 관련 기관에서의 EDC 시스템 이용률은 77.6% 이었지만 EDC 시스템을 이용한 임상시험 건수는 5건 미만이 가장 많았다. EDC 시스템은 주로 약물동력학 시험을 하는 phase I과 임상효과와 안전성을 평가하는 phase II 임상시험에서 주로 이용되었고, 기관별로는 CRO의 이용률이 가장 높았다. 모든 집단에서 가이드라인의 중요성은 높게 인식하였으나, 적용 용이성 측면에서는 CRO에서 가장 높았다. 또한, 임상시험 전자 자료 표준의 중요성을 높게 인식하였고, 전자 자료 수집에 있어 표준의 필요성을 높게 인식하였다. 그러나 임상시험 전자 자료 국제표준인 Clinical Data Interchange Standard Consortium(CDISC)에 대한 이해도는 아직 낮은 수준이었다. 이 연구 결과는 국내 임상시험 전자화를 위한 기초자료로 활용될 수 있으며 임상시험 자료 표준에 관한 정책수립에도 활용될 수 있을 것이다.

• 한국건설관리학회논문집
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• 제22권6호
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• pp.3-14
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• 2021

중국건설업에서는 BIM (Building Information Modeling)의 활용을 통해 건설업의 비효율적인 상호운용성의 문제를 해결하여 건설업의 총생산액 증가시키고자 한다. 하지만 중국 주건부에서 2011년부터 건설업의 BIM활용을 촉진하였음에도 불구하고 중국에서는 BIM 활용률은 45% 미만인 것으로 나타났다. 한편 한국 건설업은 중국보다 먼저 BIM 도입을 하여 활용하고 있는 만큼, BIM 활용수준과 BIM 수용의지가 중국보다 높을 것으로 예상된다. 따라서 본 연구에서는 한국과 중국의 BIM수용영향요인 비교분석을 통해 중국의 BIM 활용률을 향상시킬 수 있는 방안을 제안하고자 한다. 한국과 중국의 BIM수용영향요인 비교분석을 위해 기술수용이론(Technology Acceptance Model; TAM)과 BIM 수용모델 관련 선행연구고찰을 통해 BIM 수용영향요인을 분류하고, 중국의 국가적 특성과 중국건설업만이 가진 특성을 반영한 BIM 수용영향요인을 추가하여 실제 BIM 사용자인 한국과 중국 건설사업 참여주체(시공사, 설계사, CM)를 대상으로 설문조사를 실시하였으며, 통계값을 유의미한 차이를 알아보기 위해 SPSS 22.00을 활용하여 t-test 실시하였다. 마지막으로 t-test 결과를 기반으로 중국의 BIM 활용률을 향상시킬 수 있는 개선방안을 제안하였다. 본 연구의 결과를 통해 중국 건설업에 적합한 BIM 활용 활성화 방향을 제시하고, 중국 건설업의 BIM 활용 활성화 연구의 이론적 기초를 제공할 수 있을 것으로 기대한다.

• 토지주택연구
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• 제14권3호
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• pp.145-155
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• 2023

최근 건설산업 분야에 BIM 기술의 활용이 보편화되면서 3D 모델과 실제 시공 부위의 오류 확인 등을 위해 다양한 객체 탐지 알고리즘들이 활용되고 있다. 객체 탐지 기술은 건축물, 교량, 터널 등 건설시설물의 종류에 따라 객체 특성이 상이하므로 객체 탐지 기술도 적절한 방법을 사용할 필요가 있다. 또한 객체 탐지를 위해서는 초기 객체 이미지가 있어야 하며 이를 위해서도 드론, 스마트폰 등 다양한 방법으로 이미지 취득이 가능하다. 본 연구에서는 철도와 도로 시설의 터널 부위에 대하여 초기 이미지 구축을 위해 터널 내부 촬영에 최적화된 360° 카메라를 이용하여 이미지를 촬영하고, 촬영된 이미지로부터 실제 객체를 탐지하기 위한 객체 탐지 방법론으로 YOLO 알고리즘, SSD 알고리즘 및 R-CNN 알고리즘을 적용하여 방법론별 객체 탐지의 정확도를 비교 분석한다. 분석 결과 Faster R-CNN 알고리즘이 SSD, YOLO v5 알고리즘에 비해 높은 인식률 및 mAP 값을 가졌으며 인식률들의 최소·최대 값의 차이가 작아 균등한 검측 능력을 나타냈다. 이러한 연구는 철도와 도로 시설공사에 BIM 적용이 확산되고 있는 점을 고려하면 360° 카메라의 활용 방법 확대와 유지보수를 위한 터널 시설 부위의 객체 탐지 방법론 적용에 활용될 수 있다.

• 한국콘텐츠학회논문지
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• 제12권3호
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• pp.295-310
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• 2012

본 연구의 목적은 SCM을 도입한 기업들의 정성적, 정량적 성과를 분석하고자 함이다. 본 연구모형의 검증을 위해 SCM을 도입하여 실행한지 1년 이상 되는 기업에 500부의 설문지를 배포하였고, 그 중 유효한 153부가 회수되어 연구에 사용되었다. 본 연구에서는, SCM 성과영향요인들을 도출하여, 이들 간의 상호영향관계 모형화를 통해, SCM 성과에 미치는 영향을 조망하고, SCM 도입으로 인한 기업의 재무비율 차이를 분석하였다. 본 연구결과를 하면 다음과 같다. 변화관리는 정보시스템 품질과 SCM 성과에 유의한 영향을 미치는 것으로 나타났고, 정보시스템 품질 역시, SCM 성과에 유의한 영향을 미치는 것으로 나타났다. 또한, SCM 도입 후 재무비율은 유의한 차이를 나타내었으며, 재고회전율, 투자수익률, 자산수익율은 증가하였고, 매출액 대비 인건비는 감소하였다.

• Environmental Analysis Health and Toxicology
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• 제30권sup호
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• pp.7.1-7.10
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• 2015

Objectives For successful adoption of legislation controlling registration and assessment of chemical substances, it is important to obtain sufficient toxicological experimental evidence and other related information. It is also essential to obtain a sufficient number of predicted risk and toxicity results. Particularly, methods used in predicting toxicities of chemical substances during acquisition of required data, ultimately become an economic method for future dealings with new substances. Although the need for such methods is gradually increasing, the-required information about reliability and applicability range has not been systematically provided. Methods There are various representative environmental and human toxicity models based on quantitative structure-activity relationships (QSAR). Here, we secured the 10 representative QSAR-based prediction models and its information that can make predictions about substances that are expected to be regulated. We used models that predict and confirm usability of the information expected to be collected and submitted according to the legislation. After collecting and evaluating each predictive model and relevant data, we prepared methods quantifying the scientific validity and reliability, which are essential conditions for using predictive models. Results We calculated predicted values for the models. Furthermore, we deduced and compared adequacies of the models using the Alternative non-testing method assessed for Registration, Evaluation, Authorization, and Restriction of Chemicals Substances scoring system, and deduced the applicability domains for each model. Additionally, we calculated and compared inclusion rates of substances expected to be regulated, to confirm the applicability. Conclusions We evaluated and compared the data, adequacy, and applicability of our selected QSAR-based toxicity prediction models, and included them in a database. Based on this data, we aimed to construct a system that can be used with predicted toxicity results. Furthermore, by presenting the suitability of individual predicted results, we aimed to provide a foundation that could be used in actual assessments and regulations.

• 한국수소및신에너지학회논문집
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• 제24권6호
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• pp.573-579
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• 2013

Hydrogen engine with homogeneous charged compression ignition can achieve high efficiency by high compression ratio and rapid chemical reaction rates spatially. However, it needs to expansion of the operation range with over-all load conditions which is very narrow due to extremely high pressure rise rate. The adoption of the lean boosting in a HCCI $H_2$ engine is expected to be effective in expansion of operation range since minimum compression ratio for spontaneous ignition is decreased by low temperature combustion and increased surround in-cylinder pressure. In order to grasp its possibility by using lean boosting in the HCCI $H_2$ engine, compression ratio required for spontaneous ignition, expansion degree of the operation range and over-all engine performance are experimentally analyzed with the boosting pressure and supply energy. As the results, it is found that minimum compression ratio for spontaneous ignition is down to the compression ratio(${\varepsilon}$=19) of conventional diesel engine due to decreased self-ignition temperature, and operation range is extended to 170% in term of the equivalence ratio and 12 times in term of the supply energy than that of naturally aspirated type. Though indicated thermal efficiency is decreased by reduced compression ratio, it is over at least 46%.

• Parasites, Hosts and Diseases
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• 제51권3호
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• pp.357-361
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• 2013

Several epidemiological surveys have reported the prevalence of Toxoplasma gondii infection in stray cats in Korea, but little information is available on T. gondii infection in household cats. The aim of the present study was to assess the prevalence and risk factors of T. gondii infection among household cats reared in Seoul, Korea. A total of 474 blood samples were collected from clinically healthy household cats. All samples were tested using ELISA and PCR. The risk factor analysis was based on a questionnaire filled out by the owners. The overall positive rate for ELISA and PCR assays was 2.2% (10/437) and 2.1% (10/474), respectively. With regard to the origin of cats, the positive rates among cats adopted from the animal shelter and veterinary clinic for stray cats were significantly different (P<0.05). Our study demonstrated that the positive rate of T. gondii infection in household cats was low and that this low prevalence was assumed to be associated with keeping the cats indoors and restriction of eating raw food and uncooked meat. Therefore, we suggest that the owners check the origin of the cats prior to adoption to prevent infection of other animals, including humans.

• 농업과학연구
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• 제19권2호
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• pp.238-268
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• 1992

Since rural people migrated to urban area as a result of rapid industrialization in Korea, a significant proportion on agricultural labor farces has consistently reduced and therefore incurred labor shortage in rural area which might aggravate the farm household's economy. This sutdy suggests a long run plan of supplying agricultural machines for forage cultivation based on the survery of 102 livestock farm housecholds conducted in 1987, aimed at curtailing the labor costs which would contribute to improving the livestock farming management. The results of this study are as follows: 1. Among the 102 livestock farm household surveyed, 50 farm housecholds were found to cultivate 398a of grassland on average while other 52 farm households produced the forage on the 169a of land under cultivation averagely. 2. Over 50 percent of farm houseolds were reported to have their own agricultural machine for harvesting and cutting, however rates of mechanization in other operations such as mowing and sowing were less than 20 percent. 3. There were more than 50 percent of livestock farm households who have shown their intention to buy and operate their own farming machines when proprer opportunities are given. 4. In order to estimate the long-run demand for agricultural machines for livestock farm household considering current mechanization procedure, data for the machine's optimal capacty, growth of arable acreage for feed stuffs was collected and analyzed. 5. Based on the estimated demand, long range supply plan of livestock farming machines for the period of 1990-2010 was suggested. 6. Finally, measures for technological developement and finanacial support were suggested to implement so as to encourage the farmers' adoption of agricultural machines, and to achieve the goal of mechanization planning for the livestock farm household.

• Agribusiness and Information Management
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• 제10권1호
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• pp.1-15
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• 2018

Many paddy cultivating farmers in the country are forced to use their limited resources to produce adequate food for their family, leading to the degradation and reduction in potential of these resources. The yield levels of paddy at the farmers' level and in the Front Line Demonstrations (FLDs) conducted in the farmers' fields is not at par with potential yield of the paddy variety. The gap between potential yield of crop variety and yield realized in FLDs refers to Research gap and the yield gap between FLDs and due to farmers' practice refers to Extension gap. The earlier studies conducted in India in general and in Andhra Pradesh in particular highlighted the existence of both research and extension gaps with reference to paddy. It is essential that, the narrowing of both research and extension gaps is not static, but dynamic considering the influence of technological interventions in boosting paddy yields at FLDs level and at farmers' level and also with the improvement of the yield potential of paddy varieties. This calls for integrated and holistic approaches to address these two gaps and with this background, the researcher aimed at this in depth study. The findings revealed that, research gaps are high with reference to weed management and pest management and extension gaps are high with reference to farm mechanization followed by fertilizer management. Reliable source of seed, capital use and frequency of meetings with Scientists or Agricultural Officers significantly influence the extension gaps in paddy. Farmers also prioritized socio-economic and technical constraints and the analysis infers that, it is high time now for the farmers to adopt the planned technological interventions on scientific scale to minimize the extension gaps to the extent possible. As the enabling environment in the State of Andhra Pradesh is highly encouraging for the farmers with relevant policy instruments in the form of subsidized inputs, free power, credit at concessional rates of interest, constructing irrigation projects etc., the adoption of the proposed technological interventions significantly contribute to minimizing both research and extension gaps in paddy cultivation in Kurnool district of Andhra Pradesh.