• 한국수학교육학회지시리즈A:수학교육
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• 제46권2호
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• pp.155-171
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• 2007

One second grader, Junsu, was observed 4 times before and after formal multiplication lesson in Grade 2. This study describes how solution strategies in multiplication problems develop over time and investigates awareness of the relation between situation and computation in simple measurement and partitive division problems as informally experienced. It was found that Junsu used additive calculation for small-number multiplication problems but could not solve large-number multiplication problems and that he did not have concept of mathematical terms at first interview stage. After formal teaching, Junsu learned a variety of multiplication solution strategies and transferred from additive calculation to multiplicative calculation. The cognitive processing load of each strategy was gradually reduced. Junsu experienced measurement division as a dealing strategy and partitive division as a estimate-adjust strategy dealing more than one object in the first round.

• 한국IT서비스학회지
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• 제5권2호
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• pp.107-123
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• 2006

The objectives of this study is to develop a strategy for the adoption of BPM(Business Process Management) standards and an implementation guideline of the BPM standard for BPM solution developers focusing on BPEL(Business Process Execution Language) which is regarded as the most important BPM standard. In the heterogeneous and distributed IT environments, every type of enterprise software requires standards to enhance interoperability. BPMS(Business Process Management System), which is a type of enterprise software requires BPM standards such as BPEL(Business Process Execution Language), BPMN(Business Process Modeling and Notation), BPQL(Business Process Query Language) and so on to achieve multi-system interoperability and component interoperability with their BPM solutions. It is quite helpful to provide the adoption strategy concerning BPM standards for each type of BPM solution vendors who need the BPM standards. Since the BPEL is conceived as the most important BPM standard and widely adopted by many BPM vendors, we have proposed a reference architecture for BPEL implementation and also developed the detail implementation guideline of core components of the BPM system supporting the BPEL standard. Using the strategy and implementation guideline proposed in this work, BPM solution vendors can establish their own standard adoption strategy and they can also develop their BPM solutions supporting the BPM standards more efficiently.

• Strategy21
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• 통권38호
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• pp.13-46
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• 2015

Dokdo issue reaches beyond economic and security interest to Koreans, as it is regarded as symbol of her independence. Albeit the fact that Japan has merely no legitimate title over Dokdo, Japan has been tenaciously insisting their jurisdiction over Dokdo since the independence of Korea. Under such circumstances, public outrage towards Japan is most certainly understandable. Yet, mere outrage itself, lacking in logic and factual grounds, can contribute little if not any, to the desirable solution of the problem. Precedents reveal that dealing maritime issues amid lack of profound understanding in international law has often led to undesirable results, such as the inclusion of Dokdo in the Joint Management Fisheries Zone in 1999 Korea-Japan Fisheries Agreement. In a sense, adroit use of international law is a critical element in preserving Korea's sovereign rights against persistent Japanese plans to rob Dokdo once again. The Dokdo issue is inextricably bound to international law; the legal status of Dokdo as island, the equitable solution of maritime boundary delimitation and effective control, existence of dispute. Yet, the public policies and arguments made by pundits are generally in lack of understanding in international law. It is now the time for Korea to commence on long-term cross-academia / department plans to establish Dokdo strategy as part of the nationwide maritime strategy effectively using international law as its stronghold.

• 한국초전도ㆍ저온공학회논문지
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• 제4권1호
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• pp.114-118
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• 2002

We introduce a design technique for homogeneous magnets using evolution strategy. The method has several advantages over existing techniques including: it allows complete flexibility in geometric constraints on the shape of both the coil and the homogeneous volume; it guarantees a globally optimal solution, and it automatically searches the minimum number of coils that satisfies given constraints.

• 대한안전경영과학회지
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• 제17권4호
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• pp.381-396
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• 2015

The study proposes multiple TRIZ contradiction solution strategies for addressing PC (Physical Contradiction) and TC (Technical Contradiction) by implementing TRIZ cause-and-effect tree. The problem associated with TC of the ends is solved by PC of means which employs a causal relationship between causes and effects. The TRIZ contradiction solution strategies demonstrated in this research are classified into 3 types of combined strategy as follows: 1. To-Be PC and AS-Is PC, 2.To-Be PC and As-Is TC, 3.As-Is PC and To-Be TC. The combined strategy of To-Be PC and As-Is PC is similar to a divide-and-conquer technique. This strategy adopts parallel strategies using 4 separation principles in time, in space, between parts and the whole, and upon condition of two reversed-PCs. Moreover, its application elucidates the conflict relationship of two TCs from the study. The integrated 4 separation principles and 40 inventive principles present an effective synergy effect from the combination, and further addresses the problems in the TRIZ contradiction resolution strategies. Combined strategy of To-Be PC and As-Is TC implements the 40 inventive principles that To-Be PC of the means resolves the As-Is TC of the ends. Combined strategy of As-Is PC and To-Be TC also uses inventive principles to the As-Is PC of the means to solve the To-Be TC of the ends. In addition, propositional and logical relationship of necessary and sufficient conditions between TC and PC is used to support the validity of 3 TRIZ contradiction solution strategies. In addition, 3 other strategies of necessary and sufficient conditions validate the contraposition relationship of the truth table. This study discusses TRIZ case studies from National Quality Circle Contest from the years between 2011 and 2014 to provide the usage guidelines of TRIZ contradiction solutions for quality purposes. Examining analysis from the case studies and investigating combined strategies allows the users to obtain comprehensive understanding.

• 대한전기학회논문지:전력기술부문A
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• 제53권10호
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• pp.565-572
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• 2004

This paper proposes an expert system which can enhance the accuracy of real-time bus reconfiguration strategy by adopting local minimum tree search method and minimize the spreading effect of the fault by considering totally the operating condition when a main transformer fault occurs in the automated substation. The local minimum tree search method to expand the best-first search method. This method has an advantage which can improve the performance of solution within the limits of the real-time condition. The inference strategy proposed expert system consists of two stages. The first stage determines the switching candidate set by searching possible switching candidates starting from the main transformer or busbar related to the event. And, second stage determines the rational real-time bus reconfiguration strategy based on heuristic rules for the obtained switching candidate set. Also, this paper studies the generalized distribution substation modelling using graph theory and a substation database is designed based on the study result. The inference engine of the expert system and the substation database is implemented in MFC function of Visual C++. Finally, the performance and effectiveness of the proposed expert system is verified by comparing the best-first search solution and local minimum tree search solution based on diversity event simulations for typical distribution substation.

• 반도체디스플레이기술학회지
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• 제3권3호
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• pp.19-21
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• 2004

This paper presents a 3-dimensional diffusion simulation with adaptive solution strategy. The developed diffusion simulator VLSIDIF-3 was designed to re-refine areas. Refine scheme was calculated by the difference of doping concentration between any of two nodes. Each element is greater than tolerance and redo diffusion process until error is tolerable. Numerical experiment in low doping diffusion problem showed that this adaptive solution strategy is very efficient in both memory and time, and expected this scheme would be more powerful in complex diffusion model.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2004년도 춘계학술대회 발표 논문집
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• pp.55-58
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• 2004

This paper presents a 3-dimensional diffusion simulation with adaptive solution strategy. The developed diffusion simulator VLSIDIF-3 was designed to re-refine areas where difference of doping concentration between any of two nodes of each element is greater than tolerance and redo diffusion process until error is tolerable. Numerical experiment in low doping diffusion problem showed that this adaptive solution strategy is very efficient in both memory and time, and expected this scheme would be more powerful in complex diffusion model.

• Journal of Electrical Engineering and Technology
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• 제4권3호
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• pp.330-336
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• 2009

This paper proposes an on-line voltage management and control solution for a distribution system which can improve the efficiency and accuracy of existing off-line work by collecting customer voltage on-line as well as the voltage compensation capability of the existing ULTC (Under Load Tap Changer) operation and control strategy by controlling the ULTC tap based on pattern clustering and recognition. The proposed solution consists of an ADVMD (Advanced Digital Voltage Management Device), a VMS (Voltage Management Solution) and an OLDUC (On-Line Digital ULTC Controller). An on-line voltage management emulator based on multi-thread programming and the shared memory method is developed to emulate on-line voltage management and digital ULTC control methodology based on the on-line collection of the customer's voltage. In addition, using this emulator, the effectiveness of the proposed pattern clustering and recognition based ULTC control strategy is proven for the worst voltage environments for three days.

• 유통과학연구
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• 제7권4호
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• pp.15-26
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• 2009

인터넷은 기업의 운영과 경쟁방식을 송두리째 바꾸어 놓고 있다. 특히, 화훼유통 서비스를 급격히 진화시켰을 뿐만 아니라, 화훼소매점간 경쟁방식 자체를 변화시켰고 IT 서비스 제공자간 경쟁도 치열해지고 있다. 본 연구는 화훼소매점이 IT 서비스를 통해 화훼유통 서비스의 비즈니스 측면과 정보기술 측면에서 어떻게 진화하고 대응했는지 살펴보고자 한다. 또한, IT 서비스 제공자 측면에서 IT 서비스 위치 선정을 TPS(Typhoon Positioning Strategy) 관점에서 살펴보고자 한다. IT 서비스 제공업자는 높은 IT 역량을 기반으로 서비스 위치가 고객의 핵심 비즈니스(core business)에 위치하고 솔루션 수준에서 제공해야 높은 비즈니스 가치를 창출할 수 있고 지속적인 서비스의 제공이 가능하게 된다. IT 서비스 위치화 전략인 Typhoon Positioning Strategy(TPS)는 화훼유통 서비스의 비즈니스 진화방향, IT 서비스 트렌드, 그리고 사용자의 IT역량 수준을 고려해서 Business Process-Service Model을 가지고 IT 서비스 위치를 선정해야 한다는 것을 말하고 있다. 즉, IT 서비스 제공자는 자사에 적합한 IT 서비스 위치를 선정함에 있어서 먼저 고객의 핵심 비즈니스를 파악하여 솔루션 수준에서 IT 서비스를 제공해야 한다. 물론 솔루션 사용자의 IT 역량을 고려한 서비스 수준도 고려해야 할 중요한 요소이다. TPS 관점에서 고려해야 할 원칙으로 4가지를 제시했다. 원칙1: 제공하는 IT 서비스의 Solution Map 보유, 원칙2: 제공하는 IT 서비스가 고객의 핵심비즈니스를 지원, 원칙3: 제공하는 IT 서비스는 단위기능 수준이 아닌 솔루션 수준, 그리고 원칙4: 사용자(즉, 화훼소매점)의 IT 역량을 고려한 차등화 서비스 제공 등이다.