• Journal of the Optical Society of Korea
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• 제18권5호
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• pp.466-471
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• 2014

An asynchronous optical packet-switching (AOPS) node with load-balancing capability can achieve better performance in reducing the high packet-loss ratio (PLR) and time delay caused by unbalanced traffic. This paper proposes a novel dynamic load-balancing algorithm for an AOPS node with limited buffer and without wavelength converters, and considering the data flow distribution and service levels. By calculating the occupancy state of the output ports, load state of the input ports, and priorities for data flow, the traffic is balanced accordingly. Simulations demonstrate that asynchronous variant data packets and output traffic can be automatically balanced according to service levels and the data flow distribution. A PLR of less than 0.01% can be achieved, as well as an average time delay of less than 0.46 ns.

• 한국국방경영분석학회지
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• 제26권1호
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• pp.100-114
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• 2000

This paper demonstrates the application of a Quality Function Deployment (QFD) and Zero-One Goal Programming model for selecting interdependent information system project selection, there are a few research for interdependent IS project selection. Effective project evaluation necessities incorporating the many conflicting objectives of decision maker(s) into decision models. Among the many proposed methodologies of multi-criteria decision making (MCDM), Goal Programming (GP) is the most popular and widely used. The model departs from an earlier GP formulation of the problem that suggested QFD method for selection of priorities among the considered attributes or criteria. The application of the proposed methodology illustrated through an example.

• 인터넷정보학회논문지
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• 제12권1호
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• pp.85-98
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• 2011

최근, 세계적으로 에너지 소비 증가와 온난화 현상의 진행으로 정치, 경제, 사회 및 환경 부분에 직접적인 영향을 받는 글로벌 환경위기에 직면하고 있다. 이러한 문제를 해결하기 위해 세계 각 국에서는 그린 ICT 정책을 마련하고 있다. 국내에서도 환경 오염 문제를 해결하고, 에너지 효율을 높일 수 있는 그린 ICT 정책 도입을 통한 대책을 마련해야 한다. 따라서 본 연구의 목적은 국내 그린 ICT 정책 도입 후 효율을 최대화 하기 위해 고려해야 할 정책 목표의 우선순위를 전략적으로 도출하는 것이다. 이를 위해 '저탄소 녹색성장 기본법'을 바탕으로 경제성, 효율성, 환경성, 기술성, 안정성 등의 주요 변수를 도출하였고, 각각의 변수 별 세부 변수를 도출하였다. 도출된 변수들의 우선순위 분석을 위해 관련 정책 전문가를 대상으로 AHP 방법과 ANP 방법으로 각각 설문조사를 실시하였다. 설문 결과와 AHP 방법론으로 그린 ICT 정책의 우선순위를 도출한 결과 환경성, 기술성, 경제성, 효율성, 안정성의 순으로 도출되었고, ANP 방법론으로 결과를 도출한 결과 기술성, 효율성, 경제성, 환경성, 안정성의 순으로 도출되었다. 이와 같이 본 논문은 AHP와 ANP 방법론을 이용하여 그린 ICT 정책 목표의 우선순위를 학술적으로 분석하였다. 따라서 향후 관련 정책 수립 시 실용적인 가이드라인이 될 수 있다.

• 디지털융복합연구
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• 제19권12호
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• pp.243-253
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• 2021

본 연구는 스마트시티에 거주할 의향이나 가능성이 있는 잠재적인 주민들을 대상으로 AHP 분석기법을 활용해 전략목표에 대한 우선순위를 파악하는 데 목적이 있다. 스마트시티 사업의 비전, 핵심가치, 전략목표에 대한 계층구조도를 설정하기 위해 국내외 스마트시티 관련 학술논문 및 연구보고서, 사업계획서, 기관 홈페이지 등을 조사하여 교수, 연구원, 전문가 및 포커스 그룹의 검토를 거쳐 최종적으로 2계층 4개, 3계층 12개 속성들을 선정, 계층구조도를 확정하였다. 이를 바탕으로 AHP 분석을 실시한 결과, 주민들은 스마트시티 사업에 있어 삶의 질을 가장 중요시 여기는 것으로 나타났다. 하위 계층 요인에 대한 분석 결과로는 안전성을 가장 중요시 하는 것으로 나타났으며, 생활편의성, 친환경, 사회적 불평등 해소 순으로 우선순위가 분석되었다. 이러한 분석 결과를 통해 향후 스마트시티 사업 추진 시 세워야 할 전략을 제시할 수 있을 것으로 기대한다.

• 디지털융복합연구
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• 제12권8호
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• pp.49-60
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• 2014

본 논문의 목적은 사회보장분야에서 어떠한 이슈가 중요시 되고 있으며, 어떠한 이슈에 빅 데이터 분석기술이 적용가능한지를 전문가 AHP방법을 통해 살펴보는데 있다. 이를 위해 사회보장분야에서 중요시 되고 있는 이슈분석 수행하였으며, 이를 토대로 8개 주요 과제를 도출하였다. 평가기준의 쌍대비교 결과, 정책적 타당성이 사업의 효과성과 실현가능성 보다 중요한 의미를 갖는 지표로 도출되었다. 그리고 세부과제 우순순위 절대평가 결과를 살펴보면, 사회보장분야 부적정 급여 방지와 사각지대 조기 발굴은 빅 데이터 분석을 통해 복지행정의 합리성 증진과 대국민 권리구제를 강화한다는 측면에서 매우 의미 있는 과제로 도출되었다. 본 연구는 사회보장분야에서 빅 데이터 활용 가능여부를 분석하였다는 점에서 의의가 있으며, 향후 빅 데이터 관련 세부과제의 체계적인 추진을 위한 기반연구로 기능할 수 있을 것이다.

• 한국물환경학회지
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• 제28권6호
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• pp.833-842
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• 2012

In this study Window interface to Hydrological Simulation Program-FORTRAN (HSPF) developed by the United States Environmental Protection Agency (EPA) was applied to the upstream of Namgang watershed to estimate its applicability for estimating Delivery Ratio (DR) of water pollutants for Total Maximum Daily Load (TMDL). BASINS/HSPF which is selected in this study, is found to be appropriate for simulation of daily flow and water quality in target basins. DR was estimated utilizing discharge loads of unobserved sub-basin and delivery load of unobserved locations obtained not by actual evaluation but by simulation through validation and verification. Annual average DR of BOD, TN and TP were 0.97 ~ 1.50, 2.23 ~ 3.21, and 0.81 ~ 1.09 respectively. Net DR of dependent basins excluding influence of upstream basin was 1.50 ~ 1.70, 0.55 ~ 0.69, and 0.24 ~ 0.31, all of which are lower than those of independent basins area. Utilizing the model selected by this research, DR and Net DR of unobserved basins will be estimated, which will help determine priorities in management of basin areas.

• 대한물리치료과학회지
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• 제29권1호
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• pp.15-29
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• 2022

Background: The purpose of this study was to suggest agenda priorities for research and development with physical therapy technology. Design: Cross-sectional study. Methods: A survey was consecutively done to 62 experts working in physical therapy research areas to investigate the priority of the categories. Paired T-tests and Importance-Performance Analysis using SPSS 21.0 package were conducted to find the differences between importance and satisfaction of the categories and the order of priority. Results: In results, it was developed that the research and development with physical therapy technology were divided with 18 categories. And the importance were significantly higher than satisfaction in 18 categories. Specifically, categories about assistive technology and robot rehabilitation were found to be on the high importance and lower performance quadrant. Conclusion: In sum, this study was meaningful in finding usage categories of research and development with physical therapy technology and investigating Importance-Performance differences for deriving research and development with physical therapy technology.

• ETRI Journal
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• 제15권2호
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• pp.53-68
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• 1993

The field of marketing research in the satellite communication services is still in the early stage of its development. Particularly, in Korean domestic satellite service market, many theoretical and methodological opportunities now exist. In this paper we develop a model, which identifies target markets and promising application services in Korean satellite communication service Market. One key contribution of this paper is a modeling approach to the assessment of market potential and priorities of the application services in each Korean industry. We define and estimate the degree of attractiveness for each segmented market which represents the market potential estimated by current usage of terrestrial services and each market segment's willingness to adopt satellite technology. Since all possible satellite application services are not equally important in the market, they should be differentiated in terms of the likelihood of success. We introduce another index prioritizing application services by tying together three important factors affecting Korean satellite service demand. Some marketing implications of model results are also discussed. Finally the findings of our model are compared with those of other similar studies.

• 한국국방경영분석학회지
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• 제17권2호
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• pp.113-122
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• 1991

This paper presents the Allocation Priority Scheme (APS) for multiprocessor system. The objective of APS is to reduce the time-complexity on a Physical Mapping Scheme(PMS). The PMS is to allocate the nodes of the Data Dependency Graph (DDG) to the multprocessors efficiently and effectively. The APS provides the priority to each node (vertex) in the DDG. In other words, the goal of the APS is to find a request resource mapping such that the total cost (time-complexity) is minimized. The special case in which all requests have equal priorities and all resoruces have equal precedences, and the comparisons between our APS and other schems are discussed in the paper. The APS provides the heuristic rules which are based on maximum height (MH), number of children nodes ($N_c$), number of father nodes ($N_f$), and computation time ($T_c$). The estimation moth of the computaion time is in the paper.

• Journal of Computing Science and Engineering
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• 제8권1호
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• pp.57-63
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• 2014

User satisfaction has always been important in the success of software, regardless of whether it is closed and proprietary or open source software (OSS). OSS users are geographically distributed and include technical as well as novice users. However, it is generally believed that if OSS was more usable, its popularity would increase tremendously. Hence, users and their requirements need to be addressed in the priorities of an OSS environment. Online public forums are a major medium of communication for the OSS community. The research model of this work studies the relationship between user requirements in open source software and online public forums. To conduct this research, we used a dataset consisting of 100 open source software projects in different categories. The results show that online forums play a significant role in identifying user requirements and addressing their requests in open source software.