• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.240-241
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• 2012

The purpose of this study is to propose a development strategy and an activation plan of port hinterland. To do this, we design a Delphi/Fuzzy-AHP model using Delphi and Fuzzy-AHP.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.200-204
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• 2008

검색엔진을 사용해 질의를 입력 후 사용자가 원하는 정보를 얻을 때까지의 검색 결과정보의 탐색 범위에 대해 설문한 연구 보고서에 검색 결과정보의 첫 페이지만 보는 사용자가 설문인원의 41%를 차지했고, 상위 3페이지만 사용하는 사용자는 88%에 달한다고 하였다. 따라서 검색결과의 상위순위는 사용자의 정보 존재여부를 판단하는 중요한 척도가 된다. 또한 인터넷의 방대한 정보로 인해 정보 홍수에 빠진 사람들은 정보에 대한 까다로운 요구를 하고 있다. 이를 테면 개인화 또는 맞춤화된 정보를 제공 받기를 원하고 있다. 정보검색시 대다수의 사용자들은 질의의 길이를 2단어 이하의 키워드를 사용하여 질의가 특정한 토픽을 지향하도록 하고 있다. 본 논문에서는 데이터 마이닝의 연관규칙을 적용 사용자 프로파일 DB내 질의에 대한 사용자 질의패턴을 분석하여 '분석 Agent' 통한 연관 질의 리스트를 생성하고 '추천 Agent'는 사용자들의 취향변화 즉 시간에 따라 변하는 관심영역 또는 사용자 질의 변화에 대해서 날짜별 가중치를 부여하여 사용자와 상호교류를 통해 사용자에게 맞춤형 질의를 추천하는 방안을 제시하고자 한다.

• Journal of Korean Society for Quality Management
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• v.4 no.1
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• pp.31-39
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• 1976

관능검사(官能檢査) 일반법(一般法)의 표준화(標準化)를 위(爲)하여 우리나라 실정(實情)에 맞는 관능검사(官能檢査) 방법(方法)을 시험연구검토(試驗硏究檢討)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 감도시험(感度試驗) 및 차이식별(差異識別) 능력시험(能力試驗)을 통(通)하여 관능(官能)파넬을 선발(選拔)하였으며, 선발(選拔)된 파넬을 대상으로 우유(牛乳) 제품(製品)의 관능특성(官能特性)에 대한 차이식별검사(差異識別檢査), 순위시험(順位試驗), 채점시험(採點試驗), 기호시험(嗜好試驗) 등을 실시하여 우리나라 실정(實情)에 적합한 관능검사(官能檢査) 방법(方法)을 요발전(要發展)시켰다. 2. 9 단계(段階) 기호척도(嗜好尺度) 및 제품(製品)에 대한 기호성(嗜好性)의 우리말 표현(表現) 용어(用語)을 조사(調査)하였다. 3. 우리나라 산업계(産業界) 실정(實情)에 적합한 관능검사(官能檢査) 일반법(一般法)에 관(關)한 표준(標準) 규격안(規格案)을 작성(作成)하였다.

• The Korean Journal of Applied Statistics
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• v.29 no.5
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• pp.921-933
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• 2016

In this paper, we consider the comparisons of the personal preferences of analytic hierarchy process (AHP) and conjoint analysis (CA) which contain very relatively small number of alternatives. However, a direct performance comparison is not easy because these two methods have a much different process to achieve the final decision. Therefore, we adopt a validity and reference method with empirical case study for cosmetics preference of female college students. In case study, conjoint analysis has the merit of measuring internal validity; however, AHP has the merit of measuring predictive validity.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.1
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• pp.163-168
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• 2011

Blogs are an easy way to publish information, engage in discussions, and form communities on the Internet. Recently, there are several varieties of spam blog whose purpose is to host ads or raise the PageRank of target sites. Our purpose is to develope the system which detects these spam blogs (splogs) automatically among blogs on Web environment. After removing HTML of blogs, they are tagged by part of speech(POS) tagger. Words and their POS tags information is used as a feature type. Among features, we select useful features with X2 statistics and train the SVM with the selected features. Our system acquired 90.5% of F1 measure with SPLOG data set.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.04a
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• pp.10-13
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• 2016

정부는 K-ICT 클라우드 활성화를 위해 정부 3.0 클라우드 추진 계획을 발표하고 관련 제도와 법률을 제정하여 클라우드 서비스 도입을 위한 정책을 추진하고 있다. 그러나 공공 분야의 클라우드 컴퓨팅 도입은 기존의 법률, 제도, 관행의 통제로 인해 미미한 실정이다. 공공 기관의 클라우드 컴퓨팅 도입 활성화를 위해 중요한 부분은 클라우드 컴퓨팅의 성능과 품질 등에 대한 특성을 파악하는 것이다. 클라우드 컴퓨팅의 특성을 알아야만 적격의 클라우드 컴퓨팅 사업자 선정이 가능하게 된다. 유럽 연합(European Commission)에서는 클라우드 컴퓨팅의 특성을 서비스 성능과 품질에 대한 일반특성, 기술성, 경제성으로 분류하고 있다. 그러나 클라우드 도입을 위한 설계 시 공공 기관 담당자는 클라우드 특성의 각 부문별 하위 항목에 대한 상세한 내용과 수준까지 객관적으로 평가하기 어렵다. 이러한 문제를 해결하고자 본 연구는 클라우드 컴퓨팅의 성능과 품질 및 기술 특성을 파악하여 각 특성에 대한 가중치를 구하고 우선순위 측정을 통해 사업자 선정을 위한 평가 기준으로 적용하는 기법을 제안한다.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.1
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• pp.37-44
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• 2015

In traditional social network analysis, the betweenness centrality measure has been heavily used to identify the relative importance of nodes. Since the time complexity to calculate the betweenness centrality is very high, however, it is difficult to get it of each node in large-scale social network where there are so many nodes and edges. In our past study, we defined a new type of network, called the expanded ego network, which is built only with each node's local information, i.e., neighbor information of the node's neighbor nodes, and also defined a new measure, called the expanded ego betweenness centrality. In this paper, We propose algorithm that quickly computes expanded ego betweenness centrality by exploiting structural properties of expanded ego network. Through the experiment with virtual network used Barab$\acute{a}$si-Albert network model to represent the generic social network and facebook network to represent actual social network, We show that the node's importance rank based on the expanded ego betweenness centrality has high similarity with that the node's importance rank based on the existing betweenness centrality. We also show that the proposed algorithm computes the expanded ego betweenness centrality quickly than existing algorithm.

• Journal of Korean Society of Transportation
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• v.23 no.7 s.85
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• pp.77-86
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• 2005

Level of service(LOS) is a quantify measure describing operational conditions within a traffic stream, generally, in terms of such service measures as speed, travel time, freedom to measures, traffic interruptions, comfort and convenience. The LOS is leveled by highway facilities according to measure of effectiveness(MOE) and then used to evaluate performance capacity. The current evaluation of a urban road is performed by only a aspect of traffic operation without any concepts of safety. Therefore, this paper presents a method for evaluation of risk order for urban road with new MOE, user cost analysis, considering both smooth traffic operation(congestion) and traffic safety(accident). The user coat is included traffic accident cast by traffic safety and traffic congestion cost by traffic operation. First of all, a number of traffic accident and accident rate by highway geometric is inferred from urban road traffic accident prediction model (Poul Greibe(2001)) Secondly, a user cost is inferred as traffic accident cast and traffic congestion cost is putting together. Thirdly, a method for evaluation of a urban road is inferred by user cost analysis. Fourthly a accident rate by segment predict with traffic accidents and data related to the accidents in $1996{\sim}1998$ on 11 urban road segments, Gwang-Ju, predicted accident rate. Traffic accident cost predict using predicted accident rate, and, traffic congestion cost predict using predicted average traffic speed(KHCM). Fifthly, a risk order are presented by predicted user cost at each segment in urban roads. Finally, it si compared and evaluated that LOS of 11 urban road segments, Gwang-Ju, by only a aspect of traffic operation without any concepts of safety and risk order by a method for evaluation of urban road in this paper.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.40 no.12
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• pp.106-115
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• 2003

Diverse multimedia services will be deployed at hand on 3G-and-beyond multi-service CDMA systems in order to satisfy different quality of service (QoS) according to traffic types. In order to use appropriate resources efficiently the call admission control (CAC) as a major resource control mechanism needs to be used to take care of efficient utilization of limited resources. In this paper, we propose a QoS-aware CAC (QCAC) that is enabled to provide service fairness and service differentiation in accordance with priority order and that applies the different thresholds in received power considering different QoS requirements such as different bit error rates (BER) when adopting total received power as the ceil load estimation. The proposed QCAC calculates the different thresholds of the different traffic types based on different required BER applies it for admission policy, and can get service fairness and differentiation in terms of call dropping probability as a main performance metric. The QCAC is aware of the QoS requirement per traffic type and allows admission discrimination according to traffic types in order to minimize the probability of QoS violation. Also the CAC needs to consider the resource allocation schemes such as complete sharing (CS), complete partitioning (CP), and priority sharing(PS) in order to provide fairness and service differentiation among traffic types. Among them, PS is closely related with the proposed QCAC having differently calculated threshold per each traffic type according to traffic priority orders.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.36S no.6
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• pp.17-29
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• 1999

In this paper, the prioritized queueing handoff scheme in CDMA (Code Division Multiple Access) cellular system is proposed. Also, the analytical survey for the proposed scheme is carried out, and the performance of this scheme is compared with that of non prioritized scheme and FIFO (First In First Out) queue scheme by computer simulation. The handoff region is defined as the time between the handoff treshold and the receiver threshold, and it is used for the maximum queue waiting time in the proposed scheme. The handoff and the receiver thresholds are defined as rewpectively: 1) the time that the Pilot Strength Measurement Message in the neighbor in the neighbor cell is received to the BS (Base Station) under the T_ADD threshold; and 2) the time that the T_DROP timer is expired and the Pilot Strength Measurement Message in the current cell is received to the BS under the T_DROP threshold. The performance metrics for analyzing the proposed scheme are : 1) probability of forced termination; 2) probability of call blocking; 3) ratio of carried traffic to total offered load; 4) average queue size; 5) average handoff delay time in queue. The simulation results show that the proposed scheme maintains high performance for handoff requests at a small penalty in total system capacity.