• Journal of the Korean Geographical Society
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• v.41 no.6 s.117
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• pp.701-713
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• 2006

This study considers the case when a district with a high development possibility is set up as a regulation region. Initial assumption is that there would be regulation resistance in and around the regulation region. Pyeongchang is taken as a study areas, performing necessary analysis of environment regulation and regulation resistance based upon spatial analysis with the use of GIS. The research proceeding steps are as follows. After examining Pyeongchang present environment regulation state, environment regulation map is constructed, and classification of Pyeongchang's relatively development possibility level map is made. Using this regulation map and development possibility level map, relative regulation resistance level is measured. The results that the rates of Pyeongchang environment regulation region in its present state was higher than Namhan river basin's regulation region rates. Also, overlapping a high development possibility level region with an environment regulation region, the analysis results give reasons to expect high level of regulation resistance in Doam-myeon and Jinbu-myeon in small town units. The analysis of Pyeongchang new buildings locations with regard to environment regulation showed intensive distribution in the regulation region with high development possibility level and adjacent areas (about 66% of new buildings are distributed within 500m range from regulation region). Such results show that the local administration and existing environment regulation policy, not capable of offering direct benefit to the population, are having immanent problems in environment sustainable development and connected with it environment harm causation.

• Journal of Environmental Policy
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• v.11 no.1
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• pp.3-25
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• 2012

To evaluate the sustainability assessment of eco-tourism resources, the assessment of Upo wetland was conducted by defining mathematical assessment models, by developing assessment indicators and by calculating the weight of main factors affecting on the sustainability through questionnaires analysis of 135 eco-tourism experts group. After that, the current sustainability grade level for Upo wetland was confirmed, and grade-level enhancement measures on each items were proposed. Although, this paper was focused on Upo wetland, but it is meaningful to prepare for the foundation in the sense of assessing scientifically and systematically the sustainability by providing concrete research model and method for the sustainability assessment of eco-tourism resources.

• Proceedings of the Korea Association of Information Systems Conference
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• 2005.12a
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• pp.119-129
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• 2005

현재의 이동통신시장은 시장의 포화상태로 인해 신규 고객의 확보보다는 기존 고객의 유지에 마케팅 활동을 강화하고 있다. 본 연구에서는 이탈고객관리(churn management)를 위한 방안으로 데이터마이닝 기법에 기반하여 고객을 등급별로 세분화하였다. 이동통신 고객데이터를 활용하여 로짓모형, 인공신경망, SVM 등을 이탈고객 예측모형을 개발하였고, 각 모형별 성과를 통계적으로 비교하였다. 이탈고객 예측모형을 통해 고객의 이탈가능성을 등급화하여 등급별 이탈확률과 점유율, 적중률을 산출하였다. 제안된 고객등급화 방법을 통해 이동통신사들은 고객의 이탈확률에 따른 차별화된 마케팅 전락을 수행할 수 있을 것으로 기대된다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.13 no.5
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• pp.123-134
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• 1993

This study was deviced to apply fuzzy concepts to pavement serviceability evaluation. An evaluation model was developed based on workmanship of pavement during construction, external load on pavement and current distress level. Five rating fuzzy sets, three weight fuzzy sets were developed based on the concept that the most appropriate balance was achieved in Gd which was established for grading the fuzzy overall rating results. Evaluation criteria and corresponding fuzzy rating scale were suggested. A computer program for evaluating serviceability based on the criteria was developed. The program was operated by simply typing in input data on each question and producing output as Gd on the screen. lt was possible to estimate the pavement serviceability level well using this fuzzy-set-based approach.

• Journal of Korean Society of Forest Science
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• v.110 no.1
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• pp.64-71
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• 2021

Recently, climate change has gradually accelerated the occurrence of landslides. Among the various effects caused by landslides,debris flow is recognized as particularly threatening because of its high speed and propagating distance. In this study, the impacts of various factors were analyzed using quantification theory(I) for the prediction of debris flow hazard soil volume in Seoraksan National Park, Korea. According to the range using the stepwise regression analysis, the order of impact factors was as follows: vertical slope (0.9676), cross slope (0.6876), altitude (0.2356), slope gradient (0.1590), and aspect (0.1364). The extent of the normalized score using the five-factor categories was 0 to 2.1864, with the median score being 1.0932. The prediction criteria for debris flow occurrence based on the normalized score were divided into four grades: class I, >1.6399; class II, 1.0932-1.6398; class III, 0.5466-1.0931; and class IV, <0.5465. Predictions of debris flow occurrence appeared to be relatively accurate (86.3%) for classes I and II. Therefore, the prediction criteria for debris flow will be useful for judging the dangerousness of slopes.

• International Journal of Highway Engineering
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• v.3 no.2 s.8
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• pp.91-102
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• 2001

On the basis of several experiments peformed, Bahia et al. (1998) concluded that the current Superpave PG-grading system failed to characterize grading specification of fill modified binders. This conclusion motivates us to investigate the correct grating system suited for modified asphalt binders. The main concept of this development is originated from the relationship between rut depth and binder properties at high temperatures. A new grading system for modified asphalt binders suggested here somewhat resembles to the unmodified binder grading one developed by Huh et al. (2000). Thus, this investigation will provide a unified single theoretical equation of high temperature grading that can apply both to modified and unmodified binders, and will check its effectiveness with the laboratory and the field rut data reported by independent studies. Successful results observed may allow to construction of a correct grading system in the near future.

• Journal of Intelligence and Information Systems
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• v.12 no.4
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• pp.109-126
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• 2006

An effective customer classification has been essential for the successful customer relationship management. The typical customer rating is carried out by the proportionally allocating the customers into classes in terms of their life time values. However, since this method does not accurately reflect the homogeneity within a class along with the heterogeneity between classes, there would be many problems incurred due to the misclassification. This paper suggests a new method of rating customer using Holistic profit technique, and validates the new method using the customer data provided by an insurance company. Holistic profit is one of the methods used for deciding the cutoff score in screening the loan application. By rating customers using the proposed techniques, insurance companies could effectively perform customer relationship management and diverse marketing activities.

• Journal of Korean Society of Transportation
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• v.21 no.1
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• pp.21-40
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• 2003

A traffic accident analysis method was developed and tested based on the highway alignment risk indices using geographic information systems(GIS). Impacts of the highway alignment on traffic accidents have been identified by examining accidents occurred on different alignment conditions and by investigating traffic accident risk indices(TARI). Evaluative criteria are suggested using geometric design elements as an independent variable. Traffic accident rates were forecasted more realistically and objectively by considering the interaction between highway alignment factors and the design consistency. And traffic accident risk indices and risk ratings were suggested based on model estimation results and accident data. Finally, forecasting traffic accident rates, evaluating the level of risk and then visualizing information graphically were combined into one system called risk assessment system by means of GIS. This risk assessment system is expected to play a major role in designing four-lane highways and developing remedies for highway sections susceptible to traffic accidents.

• Journal of the Korean Institute of Landscape Architecture
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• v.37 no.4
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• pp.1-11
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• 2009

This study was intended to set development priorities for five undeveloped neighborhood parks scattered throughout the downtown area of Cheongju City using a PDPI(Park Development Pressure Index). In order to calculate the PDPI, this study employed an additive integration method. The PDPI was graded from 1 to 5, based on the evaluation scores in accordance with nine indicators selected through literature reviews and interviews with public officials. The indicators have been classified into three categories: physical environment, utilization possibility, and facility distribution. The indicators are as follows: 1) 'altitude and inclination' and 'NDVI' as physical environment indicators; 2) 'ratio of residential area', 'forecasted utility population', 'undeveloped period', 'redevelopment near parks', 'ratio of area divided by main streets', reflecting utilization possibility; and 3) 'Distance between Neighborhood Parks' and 'Distribution of alternative facilities' as facility distribution. The following results were found: 1) three neighborhood parks including 'Sagic 2', 'Sachen', and 'Dangsan' were ranked in the first grade of PDPI; and, 2) one neighborhood park 'Samsungdang' was ranked in the fifth grade of PDPI. The above results mean that among undeveloped neighborhood parks, three have been exposed to extremely strong park development pressure, and that while two neighborhood parks have had strong exposure to park development pressure due to potential users according to their close location to Sagic Ro, an east-west main axis of Cheongju City, one neighborhood park has had weak exposure to development pressure because of the close location to 'Chuungbuk National University' and a lack of residential areas, showing a low possibility for development.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2000.11a
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• pp.29-29
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• 2000

추진제의 폭연 특성을 실험실 규모로 측정하는 시험방법으로 NAWC에서 개발한 BIC (Ballistic Impact Chamber) 시험과 SNPE에서 개발한 Shotgun/RQ Bomb 시험이 있다. SNPE에서는 화약과 추진제가 UNO 위험등급 분류체계에서 1.6급수(우연한 개시나 반응의 전환 가능성이 거의 없는 매우 둔감한 물질)로 분류되는 기준을 UN Test Series 7c(ii)에 탄속 150m/s에서 dP/dt가 15MPa 이내로 규정하고 있다.(중략)