• 한국산학기술학회논문지
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• 제8권3호
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• pp.682-696
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• 2007

본 연구는 최근 차세대 성장 동력으로 등장하고 있는 바이오기술(BT), 정보기술(IT), 그리고 나노기술(NT)의 새로운 신기술 융합 유형 및 발전 방향에 관한 연구로 융합의 학문적 의미, 융합의 촉발 요인과 향후 전개방향을 살펴보고, 선행연구를 통해 기존의 바이오기술, 정보기술 및 나노기술들의 한계와 문제점을 도출하여, 그 한계와 문제점을 극복하는 방안으로서의 융합의 필요성을 제시하였다. 또한 다양한 융합 유형 중 바이오기술(BT) 기반의 정보기술 융합인 BIT 융합기술과 나노기술 융합인 BNT 융합기술에 한하여 선행연구 및 델파이 실증 분석을 통해 차세대 기술로 등장할 7개의 BIT 및 10개의 BNT 세부 융합기술을 도출하여 제시하였다. 따라서 본 연구의 결과는 각각 융합기술을 연구하는 연구소, 기업, 및 학계에 융합의 필요성에 따라 상호 이해도를 높이고 산학간 협력할 수 있는 기회를 제공할 것으로 기대한다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제25권4호
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• pp.162-172
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• 2021

This paper proposes stochastic methods to find an approximate solution for the L²-Wasserstein least squares problem of Gaussian measures. The variable for the problem is in a set of positive definite matrices. The first proposed stochastic method is a type of classical stochastic gradient methods combined with projection and the second one is a type of variance reduced methods with projection. Their global convergence are analyzed by using the framework of proximal stochastic gradient methods. The convergence of the classical stochastic gradient method combined with projection is established by using diminishing learning rate rule in which the learning rate decreases as the epoch increases but that of the variance reduced method with projection can be established by using constant learning rate. The numerical results show that the present algorithms with a proper learning rate outperforms a gradient projection method.

• 한국산업융합학회 논문집
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• 제23권1호
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• pp.101-106
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• 2020

Along with dust collection efficiency, pressure loss is a very important cyclone operation factor. A severe rise in pressure loss causes the problem of cost. To solve the problem, the method connecting axial-vane type cyclones in parallel is suggested recently. The axial vane type cyclone dust collector applied in this study is a small portable type. Multiple cyclones are installed in a round type. The basic performance test on the axial vane type cyclone dust collector was conducted. As a result, the cut size reduced along with a rise in the wind velocity of the cyclone dust collector inlet. According to the test on dust collection efficiency, the effect of dust collection began to appear in the range of 3㎛ and dust collection efficiency was greatly improved at 5 ㎛. The noise of the cyclone dust collector well met the fan sound power level of KSB 6361.

• 디지털융복합연구
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• 제6권3호
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• pp.121-129
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• 2008

This paper aimed to exam the influence factor of purchasing decision making of industrial buyer and analyzed their effects on success. From the previous studies, we extracted influence factor which are buying center, character of Industrial goods provider. The result showed the difference in the purchasing decision-making process in accordance with the type of buying task(Hypothesis 1). And a test was made the difference in the mode of purchase decision-making(Hypothesis 2). A test was made the difference in supplier's evaluative criterion in accordance with the type of buying task(Hypothesis 3).

• International Journal of Advanced Culture Technology
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• 제6권2호
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• pp.36-42
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• 2018

The types of sixth industry to aim of boosting agriculture and rural areas and Korea's sixth industrial cases(Local community, production-centric, distribution-centric, dine out-centric, treatment-centric, export-centric) and competitiveness measures through Japan and China. Specifically, the competitiveness through the sixth industrial case is to maximize added value through cooperation between communities and to coexist among local residents. Efforts are needed not only to create jobs for the elderly but also to gain consumer confidence, and various measures should be sought to establish a cooperative system. In addition, as customers ' needs change rapidly in the smart age, the life cycle of goods and services is getting extremely faster. Therefore, the sixth industry is expected to be able to predict changes in customer and market trends quickly and accurately, thus making efforts to bring new products and services to market more necessary and contributing to achieving rural activation.

• International Journal of Industrial Entomology and Biomaterials
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• 제48권1호
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• pp.25-32
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• 2024

Soy protein isolate (SPI) has garnered researchers' attention due to its abundance, costeffectiveness, excellent biocompatibility, hemo-compatibility, and biodegradability. However, SPI faces limitations in application due to poor processability and weak mechanical strength. Substantial efforts have been made to address these challenges. In this preliminary study, glycerol and biofibers were added to SPI to improve the mechanical properties and film forming, and glyoxal was employed to crosslink SPI molecules. The microstructure and mechanical properties of the resulting SPI/composite films were evaluated. A 15% addition of glycerol proved sufficient for good film formation. Among the biofibers, short SF microfibers were the most effective in enhancing breaking strength, while TEMPO-oxidized CNF (cellulose nanofiber) excelled among CNFs. Crosslinking with glyoxal significantly enhanced the mechanical properties, with the type of biofiber minimally affecting the mechanical properties of the crosslinked SPI composite films.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2017년도 춘계공동학술대회
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• pp.66-66
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• 2017

국내 농촌의 인구고령화, 여성화 증가로 인한 농촌노동력 감소 문제를 해결하기 위해 농업기계자동화에 관한 연구가 활발히 진행되고 있다. 본 연구는 자동화농업기계 중 자동 이식기의 성능평가 기술을 개발하기 위해 수행되었으며 이를 위해 자동 정식기의 핵심부품인 이식호퍼의 결주율, 이식율, 주간간격, 운동궤적 등을 측정할 수 있는 원형토조 실험장치를 개발하였다. 원형토조 실험장치는 원형토조, 이식호퍼 구동장치, 컨트롤러로 구성되어 있으며 이식호퍼의 회전속도(rpm)를 조절하여 주간간격을 조절할 수 있고 초고속 카메라를 이용하여 이식호퍼의 운동궤적을 측정할 수 있다. 이식작물로 고추, 양배추, 브로콜리의 3종류의 육묘를 이용하여 이식호퍼의 회전속도를 20~60 rpm 구간에서 10 rpm 단위로 속도조건변화를 주고 결주율과 이식율을 측정하였다. 이식호퍼 rpm 속도에 따른 주간거리는 190~560 mm로 나타났다. 각 rpm 단수, 작물별 평균 이식율은 고추육묘가 약 97%, 양배추육묘가 약 94%, 브로콜리육묘가 약 95%로 나타났다. 또한 초고속 카메라를 이용하여 측정한 이식호퍼의 운동궤적을 통해 선진사 제품과 대비하여 차이를 보인 것을 확인하였다. 향후 원형토조 실험장치를 이용해 다양한 작물 및 토양조건에서의 실험 및 토양저항 측정장치 개발을 통해 이식작업 진행중에 호퍼에 걸리는 부하에 대한 성능평가시험을 할 계획이다.

• 대한산업공학회지
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• 제42권4호
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• pp.263-269
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• 2016

The purpose of this study is to challenge a computational regression-type problem, that is handling large-size data, in which conventional metamodeling techniques often fail in a practical sense. To solve such problems, regression-type boosting, one of ensemble model techniques, together with bootstrapping-based re-sampling is a reasonable choice. This study suggests weight updates by the amount of the residual itself and a new error decision criterion which constructs an ensemble model of models selectively chosen by rejection limits. Through these ideas, we propose AdaBoost.RMU.R as a metamodeling technique suitable for handling large-size data. To assess the performance of the proposed method in comparison to some existing methods, we used 6 mathematical problems. For each problem, we computed the average and the standard deviation of residuals between real response values and predicted response values. Results revealed that the average and the standard deviation of AdaBoost.RMU.R were improved than those of other algorithms.

• 한국산학기술학회논문지
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• 제10권4호
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• pp.895-899
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• 2009

본 논문에서는 컨버전스 시대에 새로운 비즈니스 기회를 창출하기 위하여 고령화 사회에 대응하기 위한 로봇사업의 비즈니스 모델을 개발하고자 한다. 컨버전스 사회와 고령화 사회의 마켓 동인을 확인하기 위하여, 이들의 트렌드를 분석한다. 마켓의 가치사슬의 구성과 분석을 통하여 본 연구에서는 유비쿼터스, 헬스 그리고 로봇이 통합된 컨버전스 서비스 형태의 u-health 로봇에 초점을 맞추어 비즈니스 모델을 설계한다. 추가적으로 기술개발과 마켓을 축으로 제안된 비즈니스 모델의 진화 경로에 대하여 기술한다 마지막으로 제안된 비즈니스 모델의 효과성을 측정하고 평가하기 위한 매트릭스 기반의 평가 프레임워크를 개발한다.

• 산업융합연구
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• 제1권1호
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• pp.99-114
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• 2003

This paper intends to contribute to the understanding of customer complaining behavior by studying the relationship between intensity of dissatisfaction and type of complaining behavior. Previous research has broadly speculated on the relationship between the intensity of dissatisfaction and complaining behavior; few empirical results have, however, been reported. This study is based on a convenience sample of 278 individuals who reported intensity of dissatisfaction and type of responses to dissatisfying retailing service situations. The results of an empirical study, the relationship is found between intensity of dissatisfaction and type of complaining behavior. And it examines the relatively important marketing factors influencing intensity of dissatisfaction.