• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.606-609
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• 2015

본 연구에서는 support vector regression (SVR) 및 매개변수 최적화 알고리즘을 이용한 하천수위 예측모델을 구축하고 이를 실제 유역에 적용하여 모델 효율성을 평가하였다. 여기서, SVR은 하천수위를 예측하기 위한 예측모델로서 채택되었으며, 커널함수 (Kernel function)로서는 radial basis function (RBF)을 선택하였다. 최적화 알고리즘은 SVR의 최적 매개변수 (C?, cost parameter or regularization parameter; ${\gamma}$, RBF parameter; ${\epsilon}$, insensitive loss function parameter)를 탐색하기 위하여 적용되었다. 매개변수 최적화 알고리즘으로는 grid search (GS), genetic algorithm (GA), particle swarm optimization (PSO), artificial bee colony (ABC) 알고리즘을 채택하였으며, 비교분석을 통해 최적화 알고리즘의 적용성을 평가하였다. 또한 SVR과 최적화 알고리즘을 결합한 모델 (SVR-GS, SVR-GA, SVR-PSO, SVR-ABC)은 기존에 수자원 분야에서 널리 적용되어온 신경망(Artificial neural network, ANN) 및 뉴로퍼지 (Adaptive neuro-fuzzy inference system, ANFIS) 모델과 비교하였다. 그 결과, 모델 효율성 측면에서 SVR-GS, SVR-GA, SVR-PSO 및 SVR-ABC는 ANN보다 우수한 결과를 나타내었으며, ANFIS와는 비슷한 결과를 나타내었다. 또한 SVR-GA, SVR-PSO 및 SVR-ABC는 SVR-GS보다 상대적으로 우수한 결과를 나타내었으며, 모델 효율성 측면에서 SVR-PSO 및 SVR-ABC는 가장 우수한 모델 성능을 나타내었다. 따라서 본 연구에서 적용한 매개변수 최적화 알고리즘은 SVR의 매개변수를 최적화하는데 효과적임을 확인할 수 있었다. SVR과 최적화 알고리즘을 이용한 하천수위 예측모델은 기존의 ANN 및 ANFIS 모델과 더불어 하천수위 예측을 위한 효과적인 도구로 사용될 수 있을 것으로 판단된다.

• Journal of the Korean Society for information Management
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• v.32 no.2
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• pp.87-103
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• 2015

It is useful to find something valuable for researching through literature based discovery. Swanson's ABC model, known as literature based discovery, suggests the relationship between entities undiscovered yet. This study tries to find the valid relationship between entities by referring to citation which connects articles on similar topic. We collect citation from references in articles, and extract important concepts in titles and abstracts through text mining techniques. We reproduce the relationship between fish oil and Raynaud's disease, which is known as one of Swanson's works, and compare the results with entities identified from traditional approach.

• Journal of Korea Port Economic Association
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• v.31 no.3
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• pp.167-186
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• 2015

The purpose of this case study is to verify the usefulness of three costing models and a minimum profit management model that can support the logistics warehouse companies in the Busan Newport Distri-park. This case study investigated traditional costing, activity-based costing (ABC), and time-driven ABC (TDABC); and suggested that an appropriate minimum profit management model is contribution margin analysis. Accordingly, in order to verify the usefulness of models, this case study surveyed the actual cost management conditions of companies, applied the three costing models to the "K" warehouse company in the Busan Newport Distri-park, and undertook a comparative study of the results. This case study produced two main findings. First, TDABC was verified as the most useful and advanced of the three costing models tested. Second, contribution margin analysis was confirmed to be the most suitable model to manage minimum profits for port warehouse companies in the Busan Newport Distri-park.

• Environmental and Resource Economics Review
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• v.26 no.4
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• pp.613-639
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• 2017

A Maximum Entropy (ME) Model and an Analytical Model are analyzed in assessing Kapenta stock in Lake Kariba. The ME model estimates a Maximum Sustainable Yield (MSY) of 25,372 tons and a corresponding effort of 109,731 fishing nights suggesting overcapacity in the lake at current effort level. The model estimates a declining stock from 1988 to 2009. The Analytical Model estimates an Acceptable Biological Catch (ABC) annually and a corresponding fishing mortality (F) of 1.210/year which is higher than the prevailing fishing mortality of 0.927/year. The ME and Analytical Models estimate a similar biomass in the reference year 1982 confirming that both models are applicable to the stock. The ME model estimates annual biomass which has been gradually declining until less than one third of maximum biomass (156,047 tons) in 1988. It implies that the stock has been overexploited due to yieldings over the level of ABC compared to variations in annual catch, even if the recent prevailing catch levels were not up to the level of MSY. In comparison, the Analytical Model provides a more conservative value of ABC compared to the MSY value estimated by the ME model. Conservative management policies should be taken to reduce the aggregate amount of annual catch employing the total allowable catch system and effort reduction program.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.195-199
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• 1996

본 연구의 목적은 다음과 같다. 첫째, 기업을 중심으로 환경, 조직, 프로세스 등의 기업 내적 외적 요인의 변화와 기업의 상황적 모델을 살펴보고 상황적 모델을 중심으로 기업의 신조직에 대해 조명해 본다. 둘째, 신 조직과 활동기준원가(ABC)를 이용하여 정보시스템 도입의 요건과 기준을 새롭게 정립한다. 셋째, 정보시스템을 구현하기 위한 구체적인 방법론을 모색한다.

• Journal of the Korean Society for information Management
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• v.24 no.1 s.63
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• pp.273-300
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• 2007

In this study it is intended to develop the ontology which can express the relation between objects with emphasis on the structural representation of semantics. Its interoperability with other kinds of previous ontology and metadata was also considered so that the developed ontology may be applicable to the real situation. The ABC Ontology can get extended into another field where the application of the concept of event is Possible, for ABC Ontology Provides the fundamental framework on the axis of event. In this study it is Music where ABC Ontology can be applied properly, which results in creating Music Ontology. Music Ontology Provides the infrastructure of knowledge for reasoning of Potential meaning as well as the simple semantic connection of terms. The extended model of ABC Ontology has been developed by applying Music Ontology, which is the domain ontology and conveys meaning, to ABC Ontology that represents the whole framework. The representation of conceptual relation in ABC Ontology turns into the association of the framework and meaning in the extended model of ABC Ontology, with reasoning rules which are typical in ontology Also, interoperability of the extended model of ABC Ontology is examined in consideration of co-operating with metadata different from those in it.

• Journal of Korean Society for Quality Management
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• v.32 no.3
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• pp.81-93
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• 2004

There is no doubt that BSC(Balanced Scorecard), ABC(Activity-Based Costing System), EVA(Economic Value Added System) draw sensation in the world as the tools of Performance Evaluation System and Quality Control. They are useful tools that can help succeed in the dynamic and competitive business environment. These three tools are discussed respectably. However, it also brings doubt whether it is possible to integrate the three tools made in the similar time and which way is appropriate among the three tools according to the type and the circumstance of business. In fact, these tools are not the opposing relations but the complementary relations. Consequently, this paper explains the relations of the three methods and suggests the process of the integrated models. Besides, it provides an idea about when Performance Evaluation System and Quality Control are needed for companies under different aspects considering the circumstance used the respective methods individually.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.19-23
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• 2008

국제 회계 기준의 도입이 금융 산업 전반에 많은 업무와 IT 시스템의 변화를 요구 하고 있으며, 특히 보험업의 경우 정확한 원가분석을 통한 경쟁력을 갖춘 상품을 판매 하고자 하며, 대다수의 대형 보험사의 경우IT 업무는 Outsourcing을 통해 운영하고 있어, SLA(Service Level Agreement)계약의 정확한 원가를 산정 하고자 한다. 이에 보험 산업에서는 ERP 및 ABC를 도입 하고 있으나, 현재의 원가 산정 방식 시스템은 건 별 배분이 불가 하거나, 작업에 투입되는 시스템 자원 및 인력 비용을 많이 요구 하고 있다. 본 논문에서는 ABC 기반의, IT비용배분과 Rollup에 의한 사업비 배부 모델을 제시 하고, Pilot Test를 통하여 본 연구 모델의 우수성을 증명 하였다.

• Journal of the Korean Society for information Management
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• v.19 no.2
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• pp.159-179
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• 2002

The Dublin Core, MARC. IFLA-FRBR user communities are developing international standards for describing textual, physical and audiovisual resources to enable their resources discovery over the Internet. Therefore the metadata interoperability Problem has been exacerbated by the need for more complex metadata descriptions. In this paper we propose a new mechanism for metadata interoperability based on the new semantic web applications : IFLA-FRBR framework, INDECS metadata and an event-aware ABC models. This study introduces a new approach method which is essential to the generation of interoperable metadata descriptions, particularly in the context of multimedia contents.

• Korean journal of applied entomology
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• v.59 no.4
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• pp.341-348
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• 2020

The ATP-binding cassette (ABC) transporter superfamily represents the largest transmembrane protein that transports a variety of substrates across extra- and intra-cellular membranes. In insects, the ABC transporter proteins play crucial roles in insecticide resistance. To date, no studies have investigated the involvement of ABC transporter gene for cross-resistance to insecticide chemistries. Here, we studied such possible mechanisms against six conventional insecticides using transgenic Drosophila melanogaster strains carrying Mdr49 transcript variant A. For the 91-R and 91-C strains of Drosophila melanogaster, although they have a common origin, 91-R has been intensely selected with DDT for over 60 years, while 91-C has received no insecticide selection. Our transgenic analyses showed that overexpression of 91-R-MDR49 transcript variant A along with three amino acid variations can yield a relatively low degree of cross-resistance to carbofuran (2.0~6.7-fold) and permethrin (2.5~10.5-fold) but did not show cross-resistance to abamectin, imidacloprid, methoxychlor, and prothiofos as compared to the Gal4-driver control strain without transgene expression. These results indicate that the overexpression of Mdr49A in itself leads to a cross-resistance and three amino acid changes have additional effects on positive cross-resistance to carbofuran and permethrin.