• 에너지공학
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• 제8권4호
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• pp.512-518
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• 1999

본 논문은 각종 보조운전설비가 연계된 제지공장용 열병합발전시스템의 합리적인 운전계획을 수립하는 기법을 제시하였다. 보조운전설비로서는 보조보일러, 폐열보일러 및 슬러지 소각로가 있으며, 이 설비들이 다기 열병합발전시스템과 연계하여 운전되고 있다. 최적운전계획은 특히 환경을 고려하기 위해 목적함수에 환경요소를 추가하여 수립하였다. 전력은 구매할수있도록 전력회사와 연계되어 운전된다. 본 논문에서 제시한 최적운전계획기법은 제지공장의 에너지이용률을 향상시키는데 기여할 것으로 사료된다.

• Strategy21
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• 통권42호
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• pp.196-223
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• 2017

The aim of this paper is to analyze China's naval strengthening and threat reflected in submarines, aircraft, destroyers and missile capabilities and US Navy's counter-forces. China is strengthening its naval forces in accordance with its three-step naval force build-up plan, and the introduction of Russian destroyers and submarines is a foothold for China's naval enforcement. The Chinese Navy also converted the concept of the First-Second Island Chain Defense, which it had already maintained, to the concept of maritime layer defense. Currently, the Chinese Navy maintains the concept of a Three-Maritime Layer Defense which includes the South China Sea, where artificial islands are being built by China, in the First Layer Defense and the East China Sea in the Third Layer Defense. Along with the advancement of Chinese Navy's submarines, surface vessels and aircraft's operational capabilities, ballistic and cruise missile capabilities become a major threat to the US Navy. If a crisis occurs in the East China Sea or in the Taiwan Waters, the US Navy will face more difficulties in employing the Carrier Strike Group to manage the crisis. Meanwhile, if a crisis occurs on the Korean Peninsula, it will be a burden to dispatch Carrier Strike GroupS to the East and West Seas of the Korean Peninsula. For the stable future, the US Navy should develop a strategy to respond more effectively to the Chinese Navy, which is challenging new maritime supremacy in East Asia.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.1157-1168
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• 2021

Hotels drive the growth and development of tourism. Despite their important role, many hotels are small and medium-sized firms (SME) that are struggling to survive against fierce competition. Experts agree that strategic planning is vital for SME survival, but it is not wholly applicable for SME managers. Meanwhile, Mintzberg's concept of crafting strategy offers a more productive insight into SME strategic planning, but its abstract nature has historically discouraged empirical research on its practical benefits. This study will be the first to empirically explore the operationalization of Mintzberg's crafting strategy characteristics, and analyze its influence on organizational learning using structural equation model. Using a sample of 50 hotels in Bali, Indonesia, this study reveals that managing pattern and stability, detecting discontinuity, and knowing the business have a positive but weak effect, whereas reconciling change and continuity proves to have a positive and significantly strong effect on organizational learning. This study has bridged the gap between the abstract concepts of crafting strategy, which is a potentially better approach for SMEs, with daily operational practices. This study also proves that Mintzberg's approach can be used to predict organizational learning. This relationship is crucial since previous studies concluded that organizational learning improves company performance.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권9호
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• pp.3104-3123
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• 2022

The development of Vehicular Ad hoc Network (VANET) has greatly improved the efficiency and safety of social transportation, and the routing strategy for VANET has also received high attention from both academia and industry. However, studies on dynamic matching of routing policies with the message types of VANET are in short supply, which affects the operational efficiency and security of VANET to a certain extent. This paper studies the message types in VANET and fully considers the urgency and reliability requirements of message forwarding under various types. Based on the diversified types of messages to be transmitted, and taking the diversified message forwarding strategies suitable for VANET scenarios as behavioral candidates, an adaptive routing method for the VANET message types based on reinforcement learning (RL) is proposed. The key parameters of the method, such as state, action and reward, are reasonably designed. Simulation and analysis show that the proposed method could converge quickly, and the comprehensive performance of the proposed method is obviously better than the comparison methods in terms of timeliness and reliability.

• Structural Engineering and Mechanics
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• 제85권1호
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• pp.119-133
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• 2023

Impact event is the key factor influencing the operational state of the mechanical equipment. Additionally, nonlinear factors existing in the complex mechanical equipment which are currently attracting more and more attention. Therefore, this paper proposes a novel hybrid-separate identification strategy to solve the force identification problem of the nonlinear structure under impact excitation. The 'hybrid' means that the identification strategy contains both l1-norm (sparse) and l2-norm regularization methods. The 'separate' means that the nonlinear response part only generated by nonlinear force needs to be separated from measured response. First, the state-of-the-art two-step iterative shrinkage/thresholding (TwIST) algorithm and sparse representation with the cubic B-spline function are developed to solve established normalized sparse regularization model to identify the accurate impact force and accurate peak value of the nonlinear force. Then, the identified impact force is substituted into the nonlinear response separation equation to obtain the nonlinear response part. Finally, a reduced transfer equation is established and solved by the classical Tikhonove regularization method to obtain the wave profile (variation trend) of the nonlinear force. Numerical and experimental identification results demonstrate that the novel hybrid-separate strategy can accurately and efficiently obtain the nonlinear force and impact force for the nonlinear structure.

• Strategy21
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• 통권32호
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• pp.5-35
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• 2013

The purpose of this thesis is to suggest how to plan ROK(Republic of Korea) Navy's strategy concerning to JOAC(Joint Operation Access Concept) and ASB(Air-Sea Battle) concept of US(United States) armed forces. Since 2006, US armed forces has been developing CONOPS(Concepts of Operations), JOAC & ASB. These concepts will not only affect security environment for Korea Peninsula and West Pacific Area, but also will be affected to ROK Navy's Strategy. Therefore, Korea Navy has to consider and review those concepts and should discuss the way to secure peace of Korea Peninsula. JOAC & ASB have been developed for securing operational access ability of US armed forces against enemy forces. A2/AD(Anti-Access, Area-Denial) is the strategy of possible enemy forces against US forces' approaching into the operation area and impede operations within area. US forces had to overcome enemy's A2/AD strategy in coming century to protect national interest and sustain global leadership. The main concept of JOAC & ASB is "Cross-domain Synergy", which means 'to eliminate duplicate and improve joint operability containing space and cyber operation area.' Korea Navy's acceptance of JOAC & ASB without any revising is not a rational choice. Without the amendment some problems can be occurred by the Korea navy's acceptance for the original version of JOAC & ASB. Those are "Missing differences of operation environment between Korea and US", "Impediment from neighbor nations, especially PRC (People's Republic of China)", and "Impediment inside from Korea armed forces". Therefore, Korea Navy has to evaluate and find out the way to solve for JOAC & ASB to apply for their strategy and minimise those possible problems above. This thesis is expected to be the solution.

• Strategy21
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• 통권41호
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• pp.30-51
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• 2017

Neighboring powers in the Korean Peninsula have started to develop and operate aircraft carriers or equivalent forces to cope with rising North Korean nuclear and missile threats and also to show its national might. For example, the United States has added a aircraft carrier from the 3rd fleet to western pacific theater of operation, while Peoples Republic of China is undergoing operational test of Liaoning as well as preparing for christening of its 2nd aircraft carrier. Japan is flexing its muscle as well by deploying Izumo capable of operating F-35B to Southeast Asia to participate in multilateral exercises starting this year. It is a high time to know more about aircraft carriers or similar types in terms of maritime strategy and history. The U.S. has had by far the vast amount of experiences in utilizing aircraft carrier that it would be beneficial for us to examine U.S. perspectives and its application in the Korean Peninsula. It will provide us with insights to understand and predict what it would be like in times of crisis in the Korean Peninsula in the perspective of aircraft carrier's involvement. This paper intends to show some aspects of future conflicts in the Korean Peninsula and how the ROK Navy can best be ready for such situation. For research purpose, U.S. maritime strategy has been developed in stages ; establishment phase, WWI phase, WWII phase, Cold war phase, post Cold war phase. Each phase includes such factors as threats, strategic concept, applications, and ways to improve maritime strategy. Finally, the role of aircraft carrier based on past history as well as future conflict shines the importance to have power projection capabilities for the ROK Navy. The intrinsic nature of the navy in the world is to project power ashore just as history proved it.

• 한국과학교육학회지
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• 제25권7호
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• pp.787-793
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• 2005

이 연구의 목적은 초등학생의 인지수준에 따른 확률적 사고의 형성 정도와 TS 프로그램의 확률 활동이 확률적 사고의 형성에 미치는 효과를 알아보는 것이었다. 이를 위하여 초등학교 6학년 152명을 실험집단과 통제집단으로 나누어, 실험집단에는 TS 프로그램의 확률 활동을 투입하였고, 통제집단에는 정규 교육과정을 운영하였다. 투입 전에 SRT II와 확률적 사고 검사를 실시하여 학생들의 인지수준에 따른 확률적 사고의 형성 정도를 조사하였고, 투입 후에 확률적사고 검사를 실시하여 처치의 효과를 알아보았다. 연구 결과에 의하면, 확률 문제 해결에서 구체적 조작기와 과도기 학생들은 주관적 전략과 양적 전략을 혼용하여 사용하였으며, 전기 형식적 조작기 학생들은 양적 전략을 많이 사용하여 인지수준이 높을수록 보다 높은 수준의 확률적 사고를 하고 있었다. TS 프로그램의 확률 활동은 학생들의 확률적 사고 형성에 효과적이었다. 확률적 사고의 형성을 인지수준에 따라 분석한 결과, 전기 구체적 조작기와 과도기 학생들에게 효과적이었음을 알 수 있었다.

• 한국도서관정보학회지
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• 제54권3호
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• pp.295-320
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• 2023

정선군에는 사북공공도서관과 작은도서관 17개소, 정선교육도서관이 있으며, 2023년에는 정선군립도서관이 준공됨에 따라, 도서관발전을 위하여 정선군립도서관을 구축으로 한 지역별 균형을 고려한 도서관 정책 혁신 전략을 수립할 필요가 있다. 본 연구에서는 정선군 공공도서관이 앞으로 나아가는 방향성을 설정하고 적절한 전략을 제시함을 궁극적인 목적으로 삼았다. 이를 위해 정선군의 지역 현황과 특성을 살펴보고, 정선군 공공도서관의 운영 현황을 분석하였다. 또한 정선군민을 대상으로 도서관에 대한 만족도 조사와 수요 조사를 실시하여 도서관의 개선 방향성을 분석하였다. 최종적으로 지역 특성, 도서관 현황, 지역주민의 요구 등을 종합하여 해당 지역에 최적화된 전략을 제시하였다. 연구 결과, 비전 달성을 위한 운영목표에는 "군민의 건강한 삶을 함께하는 생활밀착형 도서관"으로 설정하고 정선군민의 건강한 삶을 위해 일상 가까이에서 함께하는 동반자로서의 역할을 강조하였다. 운영목표를 추진하기 위한 4대 전략과제를 "지역주민과 성장하는 도서관", "복합문화 교류를 제공하는 도서관", "지속가능한 미래지향적 도서관", "지역사회와 협력하는 도서관"으로 표현하였다.

• 한국과 국제사회
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• 제1권2호
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• pp.171-208
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• 2017

본 논문은 북한 핵전략의 유형적 특징과 전망을 분석하기 위한 것이다. 이를 위해 핵전략의 개념과 유형, 북한의 핵능력과 선언적 핵전략, 북한 핵전략의 운용상의 특징과 전망을 살펴본 후 결론에서 우리의 대응을 도출해본 것이다. 최근 북한의 핵무기 배치와 핵능력 증강은 우리의 안보와 군사적 대비태세에 매우 심각한 문제를 제기하고 있다. 핵전략이란 핵무기의 구성 배치 운용을 둘러싼 군사전략을 의미한다. 북한의 핵전략에 대한 연구는 북한의 핵무장이 실체화되었다는 매우 현실적인 가정에서 출발한다. 우리 국방당국이 북핵에 대한 대응책으로 선제공격, 미사일방어, 대량응징보복 개념을 제시하고 그 도입과 전개를 서두르는 것은 북한의 핵무장을 전제로 한 조치이다. 표출된 북한의 선언적 핵전략은 (1)'핵보유국법'상의 핵억제 보복전략, (2)핵선제공격론, (3)제7차 당대회에 나타난 '핵선제 불사용원칙으로, 그리고 북한 핵전략의 저의 및 운용상의 특징은 (1)기존핵국가 관행모방을 통한 비난회피, (2)선언적 핵전략을 통한 자신의 핵전략의 호도, (3)핵전력과 핵태세간 격차로 인한 핵전략의 미정착 등으로 각각 요약해 볼 수 있다. 북한은 개정헌법(2012.7), '핵무력과 경제건설의 병진노선(2013.3),' 그리고 핵보유국법(2013.4) 등을 통해 스스로 핵보유국임을 규정 선언하고 있다. 하지만 '핵보유국(핵국가)' 지위는 오로지 NPT만 부여할 수 있는데, 이것은 이미 닫힌 시스템이다. 현실적으로 우리가 당면한 북핵위협을 억제 극복해 나가기 위해서는 튼튼한 한미동맹과 긴밀한 한미 공조하에 북한핵의 억제는 물론 비핵화 무력화를 위한 우리의 단 중 장기적인 정치 군사적 대응책의 수립 이행노력이 긴요하다.