• 한국음향학회지
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• 제3권1호
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• pp.16-24
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• 1984

The objective data and subjective data correlated in order to rate sound quality of loudspeaker system and these data were analyzed by the Factor Analysis and Multi-Dimensioinal Scaling. The dimensions yielded Factor Analysis were interpreted as "Contrast", "Metallic", "Rich", "Present" and their relation to physical variables were explored by studying the positions of loudspeaker systems in the respective dimension. When the subjective similarity degree of loudspeaker systems was compared with the objective similarity degree of loudspeaker systems by Multi-Dimensional Scaling, the similarity degree of sound pressure response in the listening room closely coincided with the subjective similarity degree regardless of sound source. This result implies the necessity of measurements taken not only in an anechoic room but also in a listening room in order to rate sound quality of loudspeaker systems.

• 한국환경보건학회지
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• 제35권6호
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• pp.517-525
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• 2009

The water quality of Lake Shihwa had been rapidly deteriorating since 1994 due to wastewater input from the watersheds, limited water circulation and the lack of a wastewater treatment policy. In 2000, the government decided to open the tidal embankment and make a comprehensive management plan to improve the water quality, especially inflowing stream water around Shihwa and Banwol industrial complex. However, the water quality and microbial community have not as yet been fully evaluated. The purpose of this study is to investigate the influent water quality around the industrial area based on chemical and biological analysis, and collected surface water sample from the Siheung Stream, up-stream to down-stream through the industrial complex, Samples were collected in July 2009. The results show that the downstream site near the industrial complex had higher concentrations of heavy metals (Cu, Mn, Fe, Mg, and Zn) and organic matter than upstream sites. A combination of DGGE (Denaturing Gradient Gel Electrophoresis) gels, lists of K-WQI (Korean Water Quality Index), cluster analysis, MDS (Multi-Dimensional Scaling) and PCA (Principal Component Analysis) has demonstrated clear clustering between Siheung stream 3 and 4 and with a high similarity and detected metal reducing bacteria (Shewanella spp.) and biodegrading bacteria (Acinetobacter spp.). These results suggest that use of both chemical and microbiological marker would be useful to fully evaluate the water quality.

• 산업경영시스템학회지
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• 제35권1호
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• pp.101-106
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• 2012

Ship handling simulator is a virtual ship navigating system with three dimensional screen system and simulation programs. FTS simulation can produce theoretically infinite experiment tests without time constraint, but which results in collecting determinstic observations. RTS simulation can collect statistical observations but has disadvantage of spending at least 30 minutes for a single experiment. The previous studies suggested that the number of experiment conditions to be tested could be reduced to obtain random data with RTS simulation by focusing on highly difficult experiment condition for ship handling. It has the limitation of not estimating the distribution of ship handling difficulty for the route. In this paper, similarity and clustering analysis are suggested for reduction methodology of experiment conditions. Similarity of experiment conditions are measured as follows: euclidean distance of ship handling difficulty index and correlation matrix of distance differences from the designed route. Clustering analysis and multi-dimensional scaling are applied to classify experiment conditions with measured similarity into reducing the number of RTS simulation conditions. An empirical result on Dangin harbor is shown and discussed.

• 대한토목학회논문집
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• 제34권1호
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• pp.333-340
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• 2014

보행자들의 선호도 및 선호공간의 특성을 고찰하기 위하여 다차원척도법(MDS)을 이용하여 분석을 실시한 결과, 차원 1의 보행공간 특성은 보행자 전용도로의 유무여부, 보차분리가 되어 있는 공간과 보차분리가 되어 있지 않은 공간적 특성을 가지는 "보차분리(보행자 전용도로)"의 차원으로 해석된다. 차원 2는 자연적이고 한적한 경관적 특성을 가지는 공간과 복잡하고 혼잡한 도시적 특성을 가지는 공간으로 "자연성-도회성"의 차원으로 해석된다. 또한 보행자들의 선호공간 벡터를 분석한 결과 주거단지 사이의 보행자 전용도로, 소공원 보행공간, 근린공원 보행공간, 공공시설 주변 보행공간 등이 가장 선호되는 공간으로 나타났고, 단독주택주변 보행공간은 반대로 가장 선호하지 않는 공간으로 분석된다.

• 한국실내디자인학회논문집
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• 제1호
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• pp.52-55
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• 1992

The purpose of this study was to suggest the spatial structure among residential behaviors in relation to work space. To find the structure, Multi-Dimensional Scaling analysis was used. Respondents were 349 middle income housewives living in apartments in the area of Caopital region. Data were collected through the questinnaire survey. For the future residential interior design, following points were sugtested. A laundary space neess to be developed independently , being separated from both bathroom and kitchen/dining space. A new area which will give housewives some territoriality and also function as home office needs to be considered. A space configuration which satisfies the organic relationships among laundary behaviors such as washing dying, ironing and folding , needs to be systematically planned, with two adjoining separate zones of wet and dry utility . The present bathroom nees to be more incorporated to the private bedroom rather than to workspace.

• Membrane and Water Treatment
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• 제2권2호
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• pp.105-119
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• 2011

This study presents the tests of an Immersed Membrane BioReactor (IMBR) equipped with a draft tube and focuses on the influence of hydrodynamic conditions on membrane fouling in a pilot-scale using a hollow fiber membrane module of ZW-10 under ambient conditions. In this system, the cross-flow velocities across the membrane surface were induced by a cylindrical draft-tube. The relationship between cross-flow velocity and aeration strength and the influence of the cross-flow on fouling rate (under various hydrodynamic conditions) were investigated using Multi-Dimension Scaling (MDS) analysis. MDS technique is especially suitable for samples with many variables and has relatively few observations, as the data about Membrane Bio-Reactor (MBR) often is. Observations and variables are analyzed simultaneously. According to the results, a specialized form of MDS, CoPlot enables presentation of the results in a two dimensional space and when plotting variables ratio (output/input) rather than original data the efficient units can be visualized clearly. The results indicate that: (i) aeration plays an important role in IMBR performance; (ii) implementing the MDS approach with reference to the variables ratio is consequently useful to characterize performance changes for data classification.

• 한국관광식음료학회지:관광식음료경영연구
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• 제10권
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• pp.139-158
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• 1999

This study is concerned with analysis of user satisfaction for travel behavior. It is aimed at investigating the socioeconomic characteristics, motivation, and use pattern of the visitors at tour. For tourists' perception and preference analysis, multi-dimensional scaling was used. It is left that this type of marketing analysis of tourism and travel offers great potentional for those concerned with the developement and management of tourist vacation areas. First, the study demanstrated clearly that different tourist and portential visitors to a tourist area seek different benefit bundles from their vacation in a particular tourist areas. Second, it demonstrated that a benefit segmentation approach to tourism and travel would be the most effective that the demographic segmentation approach usually pursued in the tourism and travel industry. Form a methodological viewpoint, it has demonstrated an application of multidimensional scaling techniques to marketing in an important industry.

• 정보관리학회지
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• 제34권1호
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• pp.51-71
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• 2017

연구는 초등학교 저학년과 고학년, 학부모로 구성된 어린이 도서관 이용자들 200여명이 인지하는 별치 자료간 희망 인지 거리를 다차원척도법(Multi-Dimensional Scaling: MDS)과 K-means 군집분석을 활용해 비교 분석하고 이들의 인지 거리가 실제 어린이 도서관에 어떻게 투영되어 있는지 몇 가지 사례를 통하여 검토해 보았다. 다차원척도법은 분석 대상의 유사성이나 속성 등을 평가하여 공간상에 투영시키는 기법으로 마케팅에서 주로 시장 진단을 위해 활용되지만, 제품이나 시설에 대한 이용자의 인지적 거리를 분석하여 이상적인 물리적 배치 방안을 제시하는 데에도 적용할 수 있다. 분석 결과, 별치 자료간 인지 거리에 있어 초등학교 저학년과 고학년 그리고 학부모 집단간에 각각 차이가 나타났으며, 특히 유 아동자료와 컴퓨터자료 그리고 유아자료와 아동자료간의 인지 거리에 있어 큰 차이가 존재하는 것으로 분석되었다. 한편, Y구의 3개 어린이도서관을 대상으로 분석된 인지 거리 체계가 어떻게 투영되어 있는지 확인해 본 결과, 특정 집단의 인지 체계에 완벽히 부합하는 공간 구조를 지닌 도서관은 존재하지 않았으나, 공통적으로 유 아동자료와 컴퓨터자료, 그리고 유아자료와 아동자료가 분리 배치되어 있다는 점에서 학부모와 초등학생들의 인지 거리가 부분적으로 투영되어 있는 것으로 검토되었다.

• 대한산업공학회지
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• 제40권1호
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• pp.60-83
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• 2014

This paper aims to propose a research framework of analyzing voting activities of a national assembly on the basis of member-level voting similarity and provides a case study in the $18^{th}$ national assembly in South Korea. First, we propose a bill contentiousness measure that gives a higher score to bills for which ayes and noes are more diversified in both conservative and progressive parties. Based on the bill contentiousness measure, the top 5%, 10%, and 20% bills were identified and used for further analyses. Moreover, we propose a member-level voting similarity measure that compensates for the lower frequency of noes, and evaluate the pair-wise voting similarities for all lawmakers. Then, voting similarity differences to the affiliated/non-affiliated parties were analyzed for the members in the two major parties according to some internal/external key factors. Finally, similar voting groups were identified and their affiliations were investigated based on the multi-dimensional scaling (MDS) and network analysis techniques. A case study on the $18^{th}$ national assembly of South Korea showed that the cohesion of the members in the 'Hanara' party becomes higher than that of the 'Minju' party as the bill contentiousness increases, whereas the number of elected, local constituency versus proportional representation, and the competition intensity in a local constituency were found to be partially influential to the voting activities of lawmakers. In addition, MDS and network analysis showed that there is a distinctive difference between two parties when all bills are analyzed, whereas the diversity of parties increases in the same group as the bill contentiousness increases.

• Journal of the Korean Data and Information Science Society
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• 제24권3호
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• pp.427-436
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• 2013

소셜미디어 사용자가 크게 증가함에 따라 소셜미디어가 마케팅 도구로서 갖는 가치 또한 부각되고 있으며 많은 기업들이 소셜미디어를 기반으로 하는 마케팅에 관심을 기울이고 있다. 소셜미디어의 종류는 다양하고 소셜미디어별 특성이 서로 다르기 때문에 기업이 추구하는 목적에 적합한 소셜미디어를 선택할 필요가 있다. 본 연구에서는 기업의 마케팅 전략에서 많이 사용되고 있는 다차원 척도법을 이용하여 대표적인 소셜미디어인 페이스북, 트위터, 네이버블로그, 유튜브, 싸이월드, 미투데이에 대한 이미지 포지셔닝 분석을 실시하여, 각 소셜미디어에 대해서 사용자들이 어떠한 이미지로 인식하고 있는지를 분석하였다. 연구결과, 기업의 신뢰성 이미지와 기술 이미지 제고를 위해서는 페이스북과 트위터가 비교우위에 있었으며 기업의 마케팅 이미지와 장래성 이미지, 종합 이미지 제고를 위해서는 네이버 블로그를 활용했을 때 효과적인 것으로 나타났다. 이상의 결과들은 소셜미디어를 활용한 기업 마케팅 전략 수립시 참고자료로 활용될 수 있을 것이다.