• 한국지진공학회논문집
• /
• 제19권3호
• /
• pp.121-132
• /
• 2015

The purpose of this study is to investigate the behavior characteristics of new hollow reinforced concrete (RC) bridge pier sections with triangular reinforcement details and to provide the details and reference data. Among the numerous parameters, this study concentrates on the shape of the section, the reinforcement details and the spacing of the transverse reinforcement. Additional eight column section specimens were tested under quasi-static monotonic loading. In this study, the computer program, named RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology), was used. A innovative confining effect model was adopted for new hollow bridge pier sections. This study documents the testing of new hollow RC bridge pier sections with triangular reinforcement details and presents conclusions based on the experimental and analytical findings.

• Journal of applied mathematics & informatics
• /
• 제36권3_4호
• /
• pp.245-256
• /
• 2018

In the paper, we introduce some new classes of generalized logh-convex functions in the first sense and in the second sense. We establish Hermite-Hadamard type inequality for different classes of generalized convex functions. It is shown that the classes of generalized log h-convex functions in both senses include several new and known classes of log h convex functions. Several special cases are also discussed. Results proved in this paper can be viewed as a new contributions in this area of research.

• Journal of Advanced Marine Engineering and Technology
• /
• 제38권8호
• /
• pp.1000-1003
• /
• 2014

There are 70 vertical and 70 horizontal correctors for Pohang Light Source. Until mid of 2000, power supplies for these correctors were based on 1990's technology, so the global orbit feedback system was not possible with poor 12 bit resolution. A new task force team was assembled to develop new power supplies with BESSY type DAC cards. After the project, two vertical correctors in each lattice were connected with new power supplies, and the global orbit feedback was available within the accuracy of 5 microns. However, this replacement was not enough to satisfy the beam stability requirement of 2 microns for PLS. We have launched another power supply design based on all digital technology. This attempt was completed within a year, and 80 units were assembled in house. Currently, the global orbit feedback system is running successfully with new digital power supplies and the compensation of chamber motion due to the thermal load by using digital displacement transducers attached on each BPMs.

• Journal of applied mathematics & informatics
• /
• 제35권1_2호
• /
• pp.191-204
• /
• 2017

A new fifth-order weighted Runge-Kutta algorithm based on heronian mean for solving initial value problem in ordinary differential equations is considered in this paper. Comparisons in terms of numerical accuracy and size of the stability region between new proposed Runge-Kutta(5,5) algorithm, Runge-Kutta (5,5) based on Harmonic Mean, Runge-Kutta(5,5) based on Contra Harmonic Mean and Runge-Kutta(5,5) based on Geometric Mean are carried out as well. The problems, methods and comparison criteria are specified very carefully. Numerical experiments show that the new algorithm performs better than other three methods in solving variety of initial value problems. The error analysis is discussed and stability polynomials and regions have also been presented.

• 드라이브 ㆍ 컨트롤
• /
• 제13권3호
• /
• pp.53-66
• /
• 2016

New non-hybrid approaches to improve energy efficiency of construction machineries are reviewed in this paper. Hydraulic systems are classified into four classes according to Backe's classification and commercially promising new technologies are carefully chosen in each class. IMV, 3-Line CPR, Closed Circuit Displacement Control of Differential Cylinder, and Throttle-less Secondary Control are chosen as representative non-hybrid new technologies. Key principle of each technology is explained and representative references which run through each technology are selected. Advantages and weaknesses of each technology are discussed and compared from the view point of construction machinery manufacturers.

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2012년도 춘계 종합학술대회 논문집
• /
• pp.337-338
• /
• 2012

일본, 중국, 대만 등 중화권 국가에 집중되어 있는 한류 콘텐츠의 저변을 확대하기 위해, 해외 각국 방송사의 프로그램 유통전문가 혹은 배급사의 외화 프로그램 수입담당자를 대상으로 전문가 심층인터뷰를 실시했다. 연구결과. 대체적으로 한국 다큐멘터리에 대한 평가가 높았으며, 한국 콘텐츠의 장점으로 우수한 품질, 탄탄한 스토리 라인, 감성적인 이야기 구성 등을 들었다. 앞으로 신규시장에 진출하기 위해서는 각 지역에 맞는 외국어 더빙 서비스. 현자 국가와의 공동제작 등이 필요한 것으로 평가됐다.

• 한국군사과학기술학회지
• /
• 제13권1호
• /
• pp.84-90
• /
• 2010

Korean army currently considers the development of the new generation MLRS(Multiple Launcher Rocket System) as a new alternative, which responses on the renovation of the artillery and future battlefield environment. This study suggests that it presents cost-effectiveness of MLRS based on the Analytic Hierarchy Process and Parametric Estimating(PRICE H). According to this study, the cost-effectiveness of new generation MLRS presented that alternative A is 2.30 times and alternative B is 1.70 times, which are better than currently operating M270A1. Therefore, The best acquisition is alternative A that launcher is carried on currently operating 10ton standard truck but final acquisition alternative should be politically decided to consider viability of operator, performance and the latest of equipment.

• 벤처창업연구
• /
• 제3권3호
• /
• pp.67-88
• /
• 2008

Innovation has become a key distinct feature of modern industrial society. It is generally recognized that new knowledge and technology are one of the most important sources of innovation. However, because of their limited resources, firms can not pursue all the promising new knowledge and technology that have possibilities to be developed into critical innovation. In this article, using the stakeholder theory, we try to establish a new conceptual model that can be used for understanding knowledge creation and innovation in society. In a society, there exist diverse socio-economic groups that have conflicting values and interests. Our stakeholder theory perspective on innovation claims that innovation can occur only when new solutions can satisfy their idiosyncratic stakeholder' values and interests better than current existing solutions. From the viewpoint of stakeholder innovation theory, there could be three different types of innovation: value improvement innovation, non-traditional value Innovation, and innovation for non-traditional stakeholder.

• 반도체디스플레이기술학회지
• /
• 제23권1호
• /
• pp.7-11
• /
• 2024

In the era of the 4th Industrial Revolution, new technologies such as artificial intelligence, big data, cloud, Internet of Things, and blockchain are being developed and applied to new industries. Blockchain has the characteristics of decentralization, security, and transparency, so it can serve as a core technology for developing new growth industries. Blockchain is provided as BaaS (Blockchain as a Service), but it is not easy for users who are introducing or building blockchain to choose BaaS. In this study, we identify evaluation factors and develop a decision-making model using fuzzy theory and AHP for BaaS selection. Eventually we aim to help companies choose the best BaaS and develop and commercialize blockchain-based services by developing a new decision-making model for BaaS selection.

• 한국산학기술학회논문지
• /
• 제20권2호
• /
• pp.190-199
• /
• 2019

본 연구는 농업 신기술의 효율적 확산을 위해 혁신저항이론과 부분회귀-구조방정식모형을 통해 신기술 도입의향의 구조관계를 분석하였다. 혁신저항에 영향을 미치는 요인으로 상대적 이점, 기술 적합성, 기술 복잡성, 시험 가능성, 위험성을 선정하였고, 혁신적 개인성향과 교육, 기술, 자금지원으로 구성된 농촌지도기관의 서비스를 영향요인으로 추가하였다. 본 연구는 33개 문항으로 신기술 도입의향을 포함하여 11개 요인을 측정하는 설문지를 구성하였다. 자료수집은 농촌진흥청에서 개발한 신기술을 보급하기 위하여 시행된 시범사업에 참여하지 않은 180농가를 대상으로 2017년 4월부터 10월까지 이루어졌다. 연구결과, 혁신저항에 양(+)의 영향을 미치는 요인은 기술 복잡성과 위험성으로 나타났다. 혁신적 개인성향은 혁신저항에 유의미한 영향을 미치지 않았지만, 신기술 도입의향에 양(+)의 영향을 미쳤다. 농촌지도기관의 서비스는 혁신저항에 음(-)의 유의미한 영향을 미쳤으나, 신기술 도입의향에는 영향을 미치지 않았다. 본 연구는 농업 신기술에 대한 반감을 최소화하기 위해 농촌지도기관은 신기술과 관련된 교육, 컨설팅, 홍보 및 시범사업과 같은 활동에 노력할 것을 제안했다.