• 한국재료학회지
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• 제25권11호
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• pp.642-646
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• 2015

Super alloys, which can be divided into three categories, i.e. Ni-base, Co-base, and Fe-base alloys, are widely used for high temperature applications. Since superalloys contain many alloying elements and precipitates, their chemistry and processing parameters need to be carefully designed. In this study, we designed a new Ni alloy to prevent corrosion due to water vapor and gases at high temperatures. The new alloy was designed using the theoretical value of the resulting energy electronic state calculation($DV-X{\alpha}$ method). The components that were finally used were Cr, Mo, and Ti, with Ni as a base. For these alloys, elements were selected in order to compare their values with that of the average theoretical basis for an Inconel 625 alloy. Finally, two kinds of Ni alloy were designed: Ni-28Cr-4Mo-2Ti and Ni-20Cr-10Mo-1Ti.

• The International Journal of Costume Culture
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• 제4권1호
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• pp.44-60
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• 2001

The purpose of this study is to present suggestions to improve the problems the domestic department stores face by analyzing and comparing the status of the development of PB which is absolutely critical for the specialized domestic department stores to survive, and to search for the future course which may lead to boosting sales and profit by developing the strategic PB products. Selected for this study were atotal of 20 PB's out of domestic as well s foreign PB's in the 4 big department stores. The data were analyzed with SAS package employed as per the by items frequency, percent, mean and standard deviation. From the above study, following viewpoints can be taken into account for the future development of PB ; First, the active will of the excutive is basically necessary for successful development of PB, by relying on long-term investment. Second, the existing mid or low-price goods should be in line with the mid or high price one's development for domestic merchandising with focus on middle or high class society. Third, the stock burden, biggest problem of PB, can be solved by discount policy at optimum prices and success rate of merchandising prediction.

• 정보학연구
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• 제6권1호
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• pp.49-63
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• 2003

21세기 들어 e-비즈니스의 확산과 더불어 인터넷이라는 개방형 커뮤니케이션구조를 기반으로하는 네트워크기술의 도약적 발전으로 인해 수많은 중개형 e-마켓플레이스들이 등장하였다. 하지만, 이와같은 중개형 e-마켓플레이스들을 통한 기업간 전자상거래를 규모가 예상과 달리 저조함에 따라 현재 인지도가 높은 사이트들조차도 사업을 정리하거나 전환하고 있는 실정이다. 본 연구에서는 기업내부 혹은 기업간 e-비즈니스의 핵심거래기반으로서 논의되어왔던 e-마켓플레이스를 기업에서의 정보기술활용이라는 역사적 관점에서 재조명해보았다. 이를 통해 기업의 e-비즈니스 거래기반으로서의 중개형 e-마켓플레이스들의 위상과 갖추어야 할 비즈니스적 특성을 제시하였다.

• 대한금속재료학회지
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• 제49권9호
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• pp.739-745
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• 2011

Beta-type alloys are the most versatile class of titanium alloys. They offer the highest strength to weight ratios and very attractive combinations of strength, toughness, and fatigue resistance inlarge cross sections [1]. The present study was made to obtain useful information for the design of ${\beta}$-type titanium alloys with high-strength properties by using the $DV-X{\alpha}$ method. Employing two calculated parameters, the bond order (Bo) and the d-orbital energy level (Md) of alloying elements in ${\beta}$-type titanium alloy was introduced and used for prediction of mechanical properties. Thus, high-strength titanium alloys were designed by calculating the Md and Bo values of the previous and present titanium alloys.

• International Journal of Advanced Culture Technology
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• 제11권2호
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• pp.125-131
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• 2023

OVO is a digital platform that provides simple payments and smart financial services, as well as one of the largest digital payment platforms in Indonesia. It has wide coverage and security when making payments, and supports multiple settlement currencies. The purpose of this study is to explore the history, business model, and future strategic direction of OVO, an Indonesian e-wallet. To date, OVO has built its own mobile payment ecosystem covering a wide range of consumer scenarios including e-commerce, travel, offline shopping and finance. And it supports mobile banking, online banking, debit cards or selected partner merchants. Its three largest transaction categories are in the transportation, retail and e-commerce sectors. With over 110 million consumers and 1.3 million merchant users, it is one of the dominant e-wallets in Indonesian market and has become the country's e-payment market leader. OVO eWallet's 'One Card' model offers convenience and choice for users, thus contributing to the rapid growth of OVO eWallet. And OVO eWallet competes fiercely with other competitors, but OVO eWallet continues to grow in terms of the number of users and market share. Finally, this study analyzes the strategic goals and plans of OVO eWallet, predicts its future direction. OVO eWallet has a huge success, but there are still competition and challenges to face.

• Strategy21
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• 통권41호
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• pp.108-152
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• 2017

This paper aims to analyze hegemonic competition and the role of naval power. To this end the paper is composed of four chapters titled introduction, the role of naval power in the hegemonic competition, the role of naval power in the East Asia, and the lessons and implications for the Korean Peninsula. Since the modern era, the hegemonic competition in the East Asian region has been the intrusion and struggle process between the world system and the East Asian regional system, and the ocean between these two systems has become the goal and means of supremacy(hegemony). Currently, the hegemonic competition between the US and China consists of systemic competition at the global level and marine competition at the regional level. When South Korea is forced to make strategic choices in the course of the US-China hegemonic competition, naval power will be the first factor to be considered. The ROK is asymmetrically maintaining a deep dependency relationship with the United States in terms of security and China in relation to the economy. And while the ROK's national economic power is acquired from the ocean, the ROK's military power is imbalanced because it is centered on the ground forces. These international relations and asymmetric-unbalanced resources distribution will not be able to effectively cope with the hegemonic competition between the US and China in the future, and will limit Korea's strategic choice. Since naval power and forces are the prerequisites for the hegemonic competition or the maintenance of supremacy we must construct balanced naval forces(naval power) that are not subordinate to the ground forces at the national strategic level for the future of the country.

• 융합보안논문지
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• 제24권3호
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• pp.209-218
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• 2024

최근 북·러관계는 러시아-우크라이나 전쟁을 계기로 변곡점을 맞이하였으며, 향후 군사적·지정학적 차원에서 한반도와 동아시아 안보환경에 큰 영향을 미칠 것으로 판단된다. 2023년 9월 김정은 조선로동당 총비서의 러시아 방문과 2024년 6월 러시아의 푸틴 대통령의 방북을 계기로 '북·러 포괄적 전략 동반자 협정'이 체결되었다. 북·러 관계의 발전적 변화는 향후 한반도와 동아시아 지역의 안보환경에 큰 파장을 초래할 것으로 전망된다. 북한과 러시아가 자동군사개입으로 해석될 수 있는 조항을 명문화하며 준군사동맹을 형성함에 따라 현재 진행중인 우크라이나 전쟁에 대한 북한의 군수지원 정당성이 확보되었고, 향후 한반도 문제에 대해 러시아가 군사적으로 개입할 수 있는 실체적 근거가 마련되었다. 또한 양국 간 방위능력을 강화하기 위한 목적으로 공동조치를 실행하기 위한 제도적 장치가 마련됨으로써 러시아의 군사기술이 북한에 이전될 수 있는 가능성도 커졌다. 러시아가 유엔 안보리 상임이사국의 지위를 이용하여 국제사회의 대북제재를 무력화하고 대규모 경제지원을 단행할 경우 북한은 국제적 고립을 탈피함과 동시에 전략적 자율성을 강화하게 될 것이다. 따라서 본 연구에서는 북·러 관계의 역사적 변화과정을 살펴보고, 2024년 6월 북·러 정상회담 이후 체결된 '포괄적 전략 동반자 협정'의 주요 내용과 함의를 고찰하였다.

• 전자통신동향분석
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• 제39권2호
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• pp.93-102
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• 2024

As the scale of research and development (R&D) increases, countries and companies are consistently establishing R&D directions to meet strategic goals and market demands as well as roadmaps to increase efficiency through concentration and selection. However, establishing an effective roadmap and discovering promising technologies are challenging under the current numerous technological possibilities and uncertainties. The importance of discovering promising technologies to secure future technological competitiveness is recognized worldwide, and Europe, the United States, and Japan are establishing processes to identify promising future technologies and support related R&D. Methods for discovering promising future technologies can be classified into future social needs analysis, forecasting, surveys, use of expert opinions, and data analysis. We describe the types and limitations of technology roadmaps and investigate the status of domestic and foreign organizations using weak signal search through quantitative data analysis.

• 시스템엔지니어링학술지
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• 제4권2호
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• pp.45-54
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• 2008

This paper describes an operational concept of the network based future airborne force power using a systems engineering approach. The battlefield is changing to new system of systems that command and control by the network based BM/C4ISR. Also, it is composed of various sensors and shooters in an single theater. Future threats may be characterized as unmanned moving bodies that the strategic effect is great such as UAVs, cruise missile and tactical ballistic missiles. New threats such as low altitude stealth cruise missile may also appear. The implementation of future airborne force power network systems against these future threats is required to complex and integrated approach based on systems engineering. This work developed the operational concepts of the future airborne network system, and then derived the requirements for performing missions effectively. In addition, the scheme of future airborne force power network systems is presented.

• 무역상무연구
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• 제68권
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• pp.23-42
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• 2015

According to the increasing attention to safety and security in maritime shipping, there are diverse security systems in international logistics activities. Although prior studies on maritime transport and port security reviewed security policy and practices in order to provide useful insights for strategic agenda, a few focused on attitude to respond it. Moreover, there are no prior study on a comparative study between continents. To tackle this, this paper compared confrontation attitude to maritime transport and port security between South Korea and European Union. Results identified that maritime shipping security incorporates container cargo security management, logistics security management, logistics security certificate system, and environmental impacts management caused by maritime shipping. Further, the comparison between two countries suggests that South Korea need to take more positive attitude to respond, such as investment in equipment and technologies for maritime shipping security, construction of comprehensive management system, political supports for logistics security, and training and education for safety and security. The results provide useful insights for strategic review of security systems in South Korea, and to help strategic agenda for future improvement.