• 수산경영론집
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• 제38권1호
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• pp.19-45
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• 2007

There have not been many studies which considered both quantitative and qualitative location factors on the issues of site selection problems for a fish farm. This study develops AHP(analytic hierarchy process) model to resolve site selection problem for a fish raising farm by using quantitative and qualitative factors. In order to evaluate the validity of the location factors found in the literature review, the study used advice from fish raising farmers and related academic experts. Four major factors have been selected as economic factors, social factors, natural environmental factors and infrastructures. An AHP structural diagram has developed by considering the factors and potential sites proposed for fish farming. Through the survey on the preference of factors and potential sites, pairwise comparison matrices have been estimated and used to calculated the relative weights of each potential site. The AHP model process shown in the study can be applied to resolve site selection problems for fish raising farmers.

• 한국측량학회지
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• 제34권2호
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• pp.161-169
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• 2016

This paper is intended to propose a novel approach to select an optimal site for a small-scaled artificial recharge system installation using TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) with geospatial data. TOPSIS is a MCDM (Multi-Criteria Decision Making) method to choose the preferred one of derived alternatives by calculating the relative closeness to an ideal solution. For applying TOPSIS, in the first, the topographic shape representing optimal recovery efficiency is defined based on a hydraulic model experiment, and then an appropriate surface slope is determined for the security of a self-purification capability with DEM (Digital Elevation Model). In the second phase, the candidate areas are extracted from an alluvial map through a morphology operation, because local alluvium with a lengthy and narrow shape could be satisfied with a primary condition for the optimal site. Thirdly, a shape file over all candidate areas was generated and criteria and their values were assigned according to hydrogeologic attributes. Finally, TOPSIS algorithm was applied to a shape file to place the order preference of candidate sites.

• Bulletin of the Korean Chemical Society
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• 제22권3호
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• pp.298-302
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• 2001

A site preference of niobium atom in Rb2-xLa2Ti3-xNbxO10 (0.0 $\leq$ x $\leq1.0)$ and RbLa2-xCaxTi2-xNb1+xO10 (0.0 $\leq$ x $\leq2.0)$, which are the solid-solutions between Rb2La2Ti3O10 and RbCa2Nb3O10, has been investigated by Raman spectroscopy. The Raman spectra of Rb2-xLa2Ti3-xNbxO10 (0.0 $\leq$ x $\leq1.0)$ gave an evidence that niobium atoms substituted for titanium atoms preferably occupy the highly distorted outer octahedral sites rather than the central ones in triple-octahedral perovskite layers. In contrast, the Raman spectra of RbLa2-xCaxTi2-xNb1+xO10 (0.0 $\leq$ x $\leq2.0)$ showed no clear information for the cationic arrangement in perovskite slabs. This difference indicated that a site preference of niobium atoms is observed only when the linear Rb-O-Ti linkage can be replaced by much stronger terminal Nb-O bond with double bond character. From comparison with the Raman spectroscopic behavior of CsLa2-xA’xTi2-xNb1+xO10 (A’ = Ca and Ba; 0.0 $\leqx\leq2.0)$, it is also proposed that a local difference in arrangement of interlayer atoms causes a significantly different solid acidity and photocatalytic activity of the layered perovskite oxides, despite their crystallographically similar structures.

• 한국어류학회지
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• 제25권4호
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• pp.208-215
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• 2013

2011년 4~6월까지 충청북도 괴산군 청천면 달천 (조사지점 1)과 단양군 가대면 어상천 일대(조사지점 2)에서 묵납자루의 산란숙주조개 선호도를 실시하였다. 조사지점 1의 자연상태에서 묵납자루의 산란숙주조개 내 산란율은 곳체두드럭조개에 63.6%, 작은말조개 2.1%로 나타났고 작은대칭이와 칼조개에서 산란된 개체는 없었다. 묵납자루가 산란한 알 및 자어의 수는 곳체두드럭조개 1~41 ($12.0{\pm}9.21$)개, 작은말조개 6개였다. 실험 1의 결과 묵납자루는 곳체두드럭조개에만 산란하였고 산란율은 60%였으며, 산란한 알 및 자어의 수는 1~19 ($6.8{\pm}5.44$)개였다. 실험 2에서 묵납자루는 곳체두드럭조개, 작은말조개, 작은대칭이 모두에 산란하였고 산란율은 각각 75.0, 42.9, 21.4%였으며, 산란한 알 및 자어의 수는 각각 1~35 ($13.0{\pm}8.80$)개, 1~26 ($5.2{\pm}6.92$)개, 2~19 ($8.6{\pm}5.64$)개였다. 실험 3에서 묵납자루는 곳체두드럭조개에만 산란하였고 산란한 알은 2~10 ($6.7{\pm}4.16$)개였다. 묵납자루는 1종의 조개에만 산란하는 특이종(specialist)이라기보다는 일반종(generalist)이라고 생각되며, 곳체두드럭조개를 가장 선호하는 것으로 나타났다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권6호
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• pp.2481-2484
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• 2012

Aim: The risk factors mostly strongly associated with gastric cancer are gastric bacteria Helicobacter pylori and diet. Using a case-control study among residents in Jinan, we examined the association between the salt taste and gastric cancer according to H. pylori infection, smoking and histological type as well as tumor site. Methods: This population-based case-control study included 207 cases and 410 controls. Data on potential risk factors of gastric cancer were obtained by interview of cases and controls with a questionnaire, salt taste preference was measured for all subjects, and IgG antibodies to H. pylori were applied to assess infection. Risk measures were determined using unconditional logistic regression. Results: The proportions of salt taste at intervals of 1.8-7.2 g/L and ${\geq}7.2$ g/L were significantly higher in cases than controls, with ORs of 1.56 (1.23-3.64) and 2.03 (2.12-4.11), respectively, subjects with high salt intake having an elevated risk for gastric cancer when infected with H. pylori. Significant modification by smoking and tumor site was observed across the different measures of salt intake, the highest salt taste showed higher cancer risk in ever smokers or with non-cardia cancers. Conclusion: Our study supports the view that high intake of sodium is an important dietary risk factor for gastric cancer, with a synergistic effect found between salt and H.pylori and smoking, dependent on the tumor site.

• 수산경영론집
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• 제41권2호
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• pp.81-106
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• 2010

This study examines the information exploration characteristic and relative importance evaluation of island tourism web site. The survey items are developed based on the related studies and also implemented particular way so-called 'semi-online' that including both web based material and offline tutorial. The first objective of this study is verifying the characteristics of information exploration on island tourism of university students. The second is examining the peculiar properties of tourism information that exposed one's individual importance evaluation. The result of this study shows that most of the students have no difficulty in using the internet and exploring the island tourism information. And there is no significant difference in using and exploring the internet between male and female students. Based on the result of this study, most popular type of island tourism information is picture type. Personal blog or user created contents(UCC) that containing the other's experience of island tourism is mostly wanted contents. But there is a significant difference in importance of contents within the students. The community based information which including UCC, blog, and other community user's posting is evaluated the most important information for relatively less experienced students. On the other hand more experienced students have a preference on expertise information which created by tourism experts. The difference within the determinant factors that affecting island tourism also significant. With analysis of variance(ANOVA) on determinant factors, the tourism activity and social/culture resource are less important than others(eg. natural environment, accommodation and so on). The result of this study would be practically used for implementing the local government's effective tourism web site and enhancing the current island tourism operation. And also it gives a advantage to facilitate the island tourism for young generations.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.628-634
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• 2009

It is a common practice in Hong Kong for the main contractors of local building projects to sublet most of the work to subcontractors. Consequently their roles have gradually transformed from a constructor to a manager of subcontractors. The outcomes of a project therefore depend heavily on the subcontractors' performance. However, most of the subcontractors complain that they are unable to efficiently and effectively operate due to site coordination problems, such as inaccurate site reference lines, caused by main contractors. The site problems may consume significant amounts of resources if practical solutions cannot be agreed by the project participants early enough. Rahim Organizational Conflict Inventory-II (ROCI-II) model was developed by M.A. Rahim that measure five types of conflict management style including Integrating, Obliging, Dominating, Avoiding and Compromising. This paper presents the questionnaire survey based on the ROCI-II model to rank the preference on the conflict management style adopted by the project representatives of the subcontractors in handling the site coordination problems and its impact to the time used to agree the solutions to the different types of site coordination problems with main contractor. The survey results show that most of the subcontractors' project representatives preferred to adopt the Compromising style to tackle the site coordination problems and the time used to agree the solutions with main contractor was influenced by the conflict management style adopted.

• 산업경영시스템학회지
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• 제36권2호
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• pp.74-80
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• 2013

In this study, a novel and flexible recommender system was developed, based on product taxonomy and usage patterns of users. The proposed system consists of the following four steps : (i) estimation of the product-preference matrix, (ii) construction of the product-preference matrix, (iii) estimation of the popularity and similarity levels for sought-after products, and (iv) recommendation of a products for the user. The product-preference matrix for each user is estimated through a linear combination of clicks, basket placements, and purchase statuses. Then the preference matrix of a particular genre is constructed by computing the ratios of the number of clicks, basket placements, and purchases of a product with respect to the total. The popularity and similarity levels of a user's clicked product are estimated with an entropy index. Based on this information, collaborative and content-based filtering is used to recommend a product to the user. To assess the effectiveness of the proposed approach, an empirical study was conducted by constructing an experimental e-commerce site. Our results clearly showed that the proposed hybrid method is superior to conventional methods.

• 한국조경학회지
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• 제29권1호
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• pp.11-21
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• 2001

This study investigates how motivations, preferences, and past experiences vary by each hikers trail choice at the Mt.Keyryong National Park. The purpose of this study is to find out the factors influencing behavioral choice in the recreation areas, and establish the fundamental theory for the efficient management of the resource and visitors. For this study, we have collected 472 respondents by on-site self-administrated questionnaire from the hikers in the park. The collected data were analyzed by the descriptive statistics and the discriminant analysis. The motivations variable of hiking participation on mountain trail were categorized three types; close-nature, escapism, and physical improvement. The preferences for trail environment were classified as four categories by factor analysis; preference for nature, safety, use density, and facilities. In descriptive statistics, the study showed that the experienced hikers prefer natural trials and hikers who have preference for close-nature select longer and deeper forest trails. The results of discriminant analysis indicate that the level of past experience is the most affectable in classification of trail choice. Such variables as motivation for close-nature and preference for nature were also appeared as affecting factors on classification of trail choice. Two discriminant functions were available, and 90.5 percent of analysis sample were correctly classified. In the validity analysis, 89 percent of holdout sample were correctly classified. These hit ratios ensures an accuracy by Press Q test. The result of this study is to be useful knowledge of the choice of detailed use environments in the same recreation areas.

• 한국컴퓨터정보학회논문지
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• 제8권4호
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• pp.92-103
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• 2003

최근 전자상거래의 발전과 인터넷 사용자의 급증으로 온라인 상에서 수많은 광고들이 서비스되고 있다. 하지만 이러한 광고서비스는 사용자들의 성향 분석을 기초로 하기보다는 해당 광고의 일방적 서비스에 그치고 있다. 따라서 많은 웹사이트들이 해당 광고의 효율적 서비스를 위해 개인화된 광고서비스를 원하고 있고 해당 서버의 로그 분석을 통한 서비스를 연구 및 시행하고 있다. 본 논문에서는 서버측 로그데이터의 분석이 아닌 로컬 시스템의 로그데이터를 이용하여 사용자의 선호도와 성향을 분석한다. 또한 해당 사이트 별 분류 카테고리를 만들어 해당 분류의 가중치를 부여함으로써 개인화된 광고 시스템을 제안하려고 한다. 사용자의 선호도 분석은 웹 개인화 기법 중 협업 필터링의 대상이 되는 사용자 선호도 정보를 방문 사이트 분류에 사용하고 학습에이전트의 대상이 되는 인터넷 사용자의 행동을 해당 사이트의 방문횟수로 가정하여 사용자의 성향분석을 시도하였다. 사용자의 선호도를 벡터로 표현하고, 성향분석 결과를 단순 적용형태가 아닌 연속적 데이터로 간주하였으며 이전 데이터와 이후 데이터의 성향분석 변화를 제안하는 기법을 이용하여 새롭게 분석하고 피드백 시킴으로써 지속적인 갱신과 적용을 할 수 있도록 제안하였다. 이러한 결과를 통해 해당 분류의 광고들을 선정하고 선정된 광고에 사용자 성향분석과 동일한 과정을 적용시킴으로써 차별화된 광고 서비스를 제공할 수 있는 방법을 제시하였다.