• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.19 no.2
• /
• pp.173-181
• /
• 2001

It is very important to assess spatial data quality of a digital map produced through digital map generalization. In this study, as a aspect of spatial data quality maintenance, we examined the tolerate range of theoretical expectation accuracy and established the quality assessment standard in spatial data for the transformed digital map data do not act contrary to the digital map specifications and the digital map accuracy of the relational scale. And, transforming large scale digital map to small scale, if we reduce complexity through processes as simplification, smoothing, refinement and so on., the spatial position change may be always happened. thus, because it is very difficult to analyse the spatial accuracy of the transformed position, we used the buffering as assessment method of spatial accuracy in digital map generalization procedure. Although the tolerated range of generic positioning error for l/l, 000 and l/5, 000 scale is determined based on related law, because the algorithms adapted to each processing elements have different property each other, if we don't determine the suitable parameter and tolerance, we will not satisfy the result after generalization procedure with tolerated range of positioning error. The results of this study test which is about the parameters of each algorithm based on tolerated range showed that the parameter of the simplification algorithm and the positional accuracy are 0.2617 m, 0.4617 m respectively.

• Communications of Mathematical Education
• /
• v.31 no.1
• /
• pp.49-70
• /
• 2017

The purpose of this study was to investigate the relative influence of multiple error sources and to find optimal measurement conditions that obtain a desired level of reliability of a creative attitude test in mathematical creativity. This study analyzed the scores of the Creative Attitude Scale-Korea allowed to access publicly of 125 general students and 109 mathematically gifted students by performing a multivariate generalizability analysis. The main results were as follows. First, based on reliability, the Creative Attitude Scale-Korea was measured less precisely for mathematically gifted students. On the contrary, based on the conditional standard error of measurement, it was measured less precisely for general students. However, the Creative Attitude Scale-Korea showed strong reliability in both groups. Second, the optimal weights should adjust to .3, .3, .4 in mathematically gifted students and .4, .4, .2 in general students with three scoring components of divergent attitude, problem solving attitude, and convergent attitude based on the maximum reliability. Third, to approach desirable reliability, it is possible to use one component of divergent attitude in general students but three components of divergent attitude, problem solving attitude, and convergent attitude in mathematically gifted students. Finally this study proposed application plans for the Creative Attitude Scale-Korea and future directions of research.

• Journal of Korean Society of Steel Construction
• /
• v.21 no.2
• /
• pp.193-201
• /
• 2009

Structural design of most nonprismatic Pre-Engineered Building Systems (PEBS) is performed using optimizing software developed in foreign countries. In this study, a structural optimizing software for the design of 3-D structures of nonprismatic PEBS is developed according to the allowable stress design method of AISC2005 and KBC. Optimizing structural design with nonprismatic members is carried out by repeating the process of structural analysis and member design to minimize the weight of a structure. According to the optimizing design results of 2-D and 3-D structures with nonprismatic members, there are considerable steel savings in designing structures with nonprismatic H-shaped built-up sections rather than with H-shaped rolled sections. When H-shaped built-up sections were used, the weight of the structural steel was reduced when AISC2005 specification rather than AISC1898 was used in the design. It is therefore concluded that utilizing the new AISC2005 specification is safer in preventingweb buckling because the height of a member is designed to be small despite some differences depending on the structural type.

• Journal of Digital Convergence
• /
• v.15 no.1
• /
• pp.181-189
• /
• 2017

The purpose of this research is to set a standard for deciding competitive marketing prices of new supplying apartment houses and to analyze decision factors in sale price of supplying apartment houses with Analytic Hierarchy Process; the resulted model does not use the method that joins the land cost and the cost of construction together, but the method that compares the sales prices of surrounding apartments. This research tries to set a standard for decision of the prices of newly supplying apartment houses by classifying the determinants into the $1^{st}$ step(4 factors), the $2^{nd}$ step(9 factors), and the $3^{rd}$ step(25 factors). According to the process, the relative importance of decision factors in the sale prices is determined and this should be used as the index of sale prices for newly supplying apartment houses when the houses are provided. In addition, through the $2^{nd}$ step including 9 factors, the comparative model for sale prices is defined and the model is presented to be applied in the real business. Subsequent study additionally considering the factors apart from marketing which tries to find a generalized standard needs to be conducted.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.22 no.4
• /
• pp.169-180
• /
• 2019

Shorelines should be extracted with consistency because they are the reference for determining the shape of a country. Even in the same area, inconsistent minimum vertex intervals cause inconsistencies in the coastline length, making it difficult to acquire reliable primary data for national policy decisions. As the shoreline length cannot be calculated consistently for shorelines produced by determining the arbitrary distance between points below 1m, a methodology to calculate consistent shoreline length using the minimum vertex interval is proposed herein. To compare our results with the shoreline length published by KHOA(Korea Hydrographic and Oceanographic Agency) and analyze the change in shoreline length according to the minimum vertex interval, target sites was selected and the grid overlap of the shoreline was determined. Based on the comparison results, minimum grid sizes and the minimum vertex interval can be determined by deriving a polynomial function that estimates minimum grid sizes for determining consistent shoreline lengths. By comparing public shoreline lengths with generalized shoreline lengths using various grid sizes and by analyzing the characteristics of the shoreline according to vertex intervals, the minimum vertex intervals required to achieve consistent shoreline lengths could be estimated. We suggest that the minimum vertex interval methodology by quantitative evaluation of the determined grid size may be useful in calculating consistent shoreline lengths. The proposed method by minimum vertex interval determination can help derive consistent shoreline lengths and increase the reliability of national shorelines.

• Tunnel and Underground Space
• /
• v.32 no.5
• /
• pp.312-326
• /
• 2022

The generalized Hoek-Brown (GHB) criterion, which is recognized as one of the standard failure conditions for rock mass, is specialized for rock engineering applications and covers a wide range of rock mass conditions. Accordingly, many research efforts have been devoted to the incorporation of this criterion into the stability analysis of rock structures. In this study, the slip-line analysis method, which is a kind of elastoplastic analysis method, is combined with the GHB failure criterion to derive analytical equations that can easily calculate the plastic radius and stress distribution in the vicinity of the circular tunnel. In the process of derivation of related formulas, it is assumed that the behavior of rock mass after failure is perfectly plastic and the in-situ stress condition is hydrostatic. In the formulation, it is revealed that the plastic radius can be calculated analytically using the two respective tangential friction angles corresponding to the stress conditions at tunnel wall and elastic-plastic boundary. It is also shown that the plastic radius and stress distribution calculated using the derived analytical equations coincide with the results of Lee & Pietruszczak's numerical method published in 2008. In the latter part of this paper, the influence of the quality of the rock mass on the size of the plastic zone, the stress distribution, and the change of the tangential friction angle was investigated using the derived analytical equations.

• Journal of The Korean Association of Information Education
• /
• v.20 no.6
• /
• pp.585-596
• /
• 2016

Software Education will be implemented at elementary, middle and high schools starting in 2018. The goal of software education is to help students develop Computational thinking skills. Computational thinking is largely composed of abstraction and automation. However, the concepts related to abstraction are defined differently for each country, giving confusion to students and teachers. Therefore, in this paper several definitions of abstraction are compared and defined reasonably. And we proposed an abstraction teaching method and evaluation criteria in elementary school based on a reasonable definition. The definition of abstraction presented in this paper is expected to be able to present a solution to the problems encountered in the course of software education in the future.

• Vending industry
• /
• v.10 no.2 s.31
• /
• pp.73-77
• /
• 2011

자동판매기 매매 관련 분쟁은 한국소비자단체협의회 자율분쟁조정위원회에서 조정을 한다 이 위원회는 사법적 판단과 중재결정이 갖는 단점을 보완하기 위한 사전적 분쟁 해결 장치로서, 분쟁의 당사자가 다른 당사자에 대해 승리를 얻은 게 아니라 서로가 수용할 수 있는 해결책을 발견하여 당사자 모두에게 이익(win-win)이 되는 방향으로 분쟁 해결을 도모하고 있다. 한마디로 합리적으로 분쟁을조정하고 있는 것이다. 과거 방문판매의 비중이 높았을 당시 자판기 관련 분쟁도 많이 발생했다. 특히 소비자들 기망하는 사기 판매도 많아 피해를 당한 억울한 사람들이 조정을 요청하기도 했다. 방문판매의 비중이 줄어들자고 고정 건수도 급감했다. 자판기가 실수요 위주로 재편이 되다보니 꼭 필요한 사람이 자판기를 구매하는 행태가 일반화된 것이다. 이렇게 절대 건수를 줄었지만 분쟁은 여전히 발생하고 있다. 자판기 구매자가 운영을 하다가 계약해지를 하고 싶은 쪽으로 마음이 바뀌는 경우가 가장 많다. 자판기 방문판매는 사업권유거래에 해당되어 소비자가 계약해지를 원하면 판매자는 수용을 해야 한다. 공정거래위원회와 한국자동판매기공업협회가 제정한 <자판기 매매 표준약관>을 기준으로 손율을 적용하고 있는데 계약해지 하는 입장에서 이 손율도 무척 아까울 수밖에 없다. 가능하면 손율을 많이 받으려는 판매자 입장과 적게 적용받으려는 소비자 입장의 중간에서 합리적인 조정활동이 이루어진다. 이 자율분쟁조정위원회에는 한국자동판매기공업협회 임원도 조정의원으로 참여하고 있다. 사업자와 소비자 상호 신뢰를 바탕으로 건전한 소비문화를 만들어 나가기 위해서는 다양한 분쟁 발생 사례에 대한 모범 조정 해결 사례를 명확히 이해하는 게 중요하다. 지금부터는 과연 어떠한 분쟁유형이 발생하고, 조정은 어떻게 이루어지고 있는지 사례들을 예시한다. 한국소비자단체협의회가 발간한 <2010년 자율분쟁조정위원회 조정사례집>에서 발췌를 했다. 이 사례들은 자판기 관련 분쟁에 있어 해결기준을 제시하는데 도움이 되리라 판단된다.

• Journal of Digital Convergence
• /
• v.11 no.4
• /
• pp.139-145
• /
• 2013

This study examines the logistics policy and system to activate the air freight known shipper system in Korea in order to suggest how to use the system necessary to convert and expand common shippers into known shippers. Even though "The Act on Aviation Safety and Security" and "Air Freight Security Criteria for Known Shippers" were revised in 2012 and 2011 each, the purpose was to regulate procedures to control aviation safety and security and air also freight security, so it does not include any measures to activate the known shipper system. Therefore, to activate the known shipper system, this study suggests measures to use the logistics security support system of "The Fundamental Law on Logistics Policy" revised in 2012, the logistics cooperation system, and consulting support as well.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• v.12 no.2
• /
• pp.263-274
• /
• 2001

This article describes and illustrates cases the treatment of primary and secondary encopresis using a changing conditions and criterion design with two subjects. The dependent variables measured were increase in appropriate toileting behavior and decrease in inappropriate toileting behavior. After 12 and 13 weeks of treatment encopresis was completely eliminated. In a two-month follow-up and one year follow-up inappropriate toileting behavior was not reported. Appropriate toileting behavior was also reported generalized to settings outside the home.