• 응용통계연구
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• 제23권5호
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• pp.933-941
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• 2010

행렬도는 고차원의 자료를 저차원 공간에 투영하여 자료를 시각화하는 비교적 현대적인 방법으로써, 자료의 산포도, 집단 구분, 변수사이의 상관관계 등 유용한 정보들을 제공한다. 본 연구에서는 이러한 행렬도를 간략하게 소개하고, 행렬도의 구현을 위해 대중성이 높아지고 있는 무료 소프트웨어인 R의 BiplotGUI 패키지를 사용하였다. 그리고 전북대학교에서 2009년도에 실시된 신입생의 진로의식 조사 자료를 이용하여, 신입생의 선호직업과 진로성숙도의 관계를 행렬도 분석방법으로 살펴보았다.

• 대한지리학회지
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• 제47권2호
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• pp.268-281
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• 2012

인구이동통계는 사회현상에 대한 공간적 이해와 공간과정의 사회적 영향 파악에 유용한 정보를 제공해줌에도 불구하고 데이터 구조의 복잡성 때문에 자료 서비스와 분석이 제한되어 왔다. 한편 인구이동통계를 탐색하고 시각화하는 효과적인 방법인 유선도 작성(flow mapping)은 아직 상용 GIS 소프트웨어서 완전히 구현되지 못하고 있다. 이에 본 연구의 목적은 Web GIS를 통한 유선도 제작과 이를 이용한 인구이동통계에 대한 탐색적 공간 분석이 가능함으로 보여주는 것이다. 데이터베이스, GIS, 지도학적 관점에서 인구이동통계의 특성을 고찰하였고, 이를 바탕으로 O-D 구조의 인구이동통계를 유선도 제작에 적합한 공간데이터로 변환하였다. 인구이동통계에 적합하도록 Web GIS의 사용자 인터페이스를 전문화하였고, 지도화의 시간, 공간 및 속성 범위의 설정을 통한 탐색적 시각화가 가능하도록 구성하였다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제12권2호
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• pp.133-143
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• 2009

통계는 삶의 문제에서 출발하여 주어진 문제를 해결하기 위해 통계문제로 번안되고, 자료가 정의되고 수집되어 적절하게 통계를 활용하여 원문제의 해결을 해야 한다. 그러므로 통계교육은 이러한 연장선상에서 유기적이고 체계적으로 이루어져야 한다. 이 논문에서는 초등 통계 영역이 가지는 문제점들로 교육과정상의 문제점, 교과서 구성 측면에서의 문제점, 수업 운영의 문제점, 실생활과의 연계 부족, 다른 영역과의 연계성의 문제, 통계에 대한 인식의 문제 등을 살펴보았다. 이러한 문제점의 해결방안에 대해 탐구하여 초등통계교육의 개선을 위한 시사점을 제공하는데 그 목적이 있다.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제31권1호
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• pp.149-177
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• 2017

우리나라의 근 현대 수학 교재는 19세기말 아라비아 숫자를 이용한 필산(筆算)이 산학전문가들에게 소개되면서 선교사와 서당에서의 서양수학 교육을 시작으로 1894년 6월 28일 갑오교육개혁을 통하여 수학교육이 공교육에 포함된 이후 공식적으로 발간되기 시작하였다. 1905년 조선통감부를 통한 수학교과과정의 소개와 1910년 이후 일제강점기, 또 1945년 이후 군정에서의 수학교재 그리고 1948년 정부 수립이후 2015년 개정 수학과 교육과정을 거치면서 다양한 형식으로 발간되어 왔다. 본 연구에서는 조선 말기부터 대한제국, 일제 강점기, 해방 후 미군 군정청, 대한민국 교육과정의 변화를 거치면서 개발되어 소개된 근 현대수학 교재들의 특징을 시대별로 분류하여 소개한다.

• Advances in environmental research
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• 제6권3호
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• pp.229-240
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• 2017

This paper assessed environmental sanitation behaviour of market operators in selected markets in Ibadan, Nigeria. The two largest markets in the study area (Aleshinloye and Bodija markets) were selected for sampling. The selected markets represented the two types of markets; modern and traditional markets. The modern market comprises 3803 shops while the traditional market comprises 5943 shops. Multistage sampling technique was adopted in questionnaire administration. The selected markets were stratified into zones based on the goods sold. Systematic sampling was used in the selection of traders across the markets. 2% of traders were selected for sampling in each category of goods sold making a total of 189 respondents. This comprises 77 of traders from modern market and 112 traders from traditional markets. Descriptive and Inferential statistics were used in analysing the data. Findings revealed poor access to environmental sanitation facilities especially at the traditional market. The study also established poor environmental sanitation behaviour in terms of utilisation of available amenities across both markets. It recommended a synergy of efforts by all environmentally concerned institutions in managing the market environment. It also advocated for the provision of environmental sanitation facilities in markets by, government, market management authorities, traders, Community Based Organizations (CBOs) and Non-governmental Organizations (NGOs). In addition environmental education is imperative while enforcement of environmental regulations in the market and others with similar setting is strongly encouraged.

• 웰빙융합연구
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• 제1권1호
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• pp.21-26
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• 2018

Modern society has become an aging society, and the National Statistics Office(NSO) expects that Korea will be also an aging society by 2019, that is, people over the age of 65 will account for 14 percent from the total population. In addition, the increase of labor flexibility is also one of the dramatic features in modern society. However, this social shift have unpredictable results, that is, the advent and increase of grandparent and grandchildren family. Modern medical technology has given Koreans longer expectancies, and structural and economic changes in society have brought early retirement. One of the main reasons that grandparent and grandchildren family increase is below an average of two children per family. There are various services available such as Health support center, Dream start center, Youth support center, Community child center, and Community welfare center. Besides, schools operates various programs for grandparent and grandchildren family with social workers and school counselors. But, most of all, what is necessary is a change of perspective on them. Basically, we need to develop a clear perspective on grandparent and grandchildren family as a not dismantling family type but alternative family type with creating a separate program or service

• 동아시아식생활학회지
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• 제11권1호
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• pp.71-81
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• 2001

The Purpose of this study was to identify the dimensions and pattern types for the perception of Korean traditional food and to find the determinants of the pattern types, taking food cultural background into account. Data were factor and cluster analyzed, and the results revealed two different dimensions and pattern types. Descriptive statistics showed that perceptional pattern types, i.e., traditional-modern pattern and tradition-oriented pattern, are likely to vary depending on socio-demographic and cultural background of Korean traditional food in Korea. Similarities and differences in perceptional pattern types are discussed, and future implications for food and nutrition specialists and food marketers are provided.

• 통합자연과학논문집
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• 제10권4호
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• pp.249-257
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• 2017

The main focus when developing software is to improve the reliability and stability of a software system. We are enjoying a very comfortable life thanks to modern civilization, however, comfort is not guaranteed to us. Once software systems are introduced, the software systems used in the field environments are the same as or close to those used in the development-testing environment; however, the systems may be used in many different locations. Development of software system is a difficult and complex process. Generally, existing software reliability models are applied to software testing data and then used to make predictions on the software failures and reliability in the field. In this paper, we present an improved exponential NHPP software reliability model in different development environments, and examine the goodness-of-fit of improved exponential model and other model based on two datasets. The results show that the proposed model fits significantly better than other NHPP software reliability model.

• Communications for Statistical Applications and Methods
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• 제8권3호
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• pp.643-650
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• 2001

Some classical plots like scatterplot matrices and parallel coordinates are valuable tools for data visualization. These tools are extensively used in the modern data mining softwares to explore the inherent data structure, and hence to visually classify or cluster the database into appropriate groups. However, the interpretation of these plots are very sensitive to the arrangement of variables. In this work, we introduce two methods to arrange the variables for data visualization. First method is based on the work of Wegman (1999), and this is to arrange the variables using minimum distance among all the pairwise permutation of the variables. Second method is using the idea of principal components. We Investigate the effectiveness of these methods with parallel coordinates using real data sets, and show that each of the two proposed methods has its own strength from different aspects respectively.

• Journal of Communications and Networks
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• 제8권4호
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• pp.432-441
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• 2006

As the community antenna television (CATV) networks becomes ubiquitous, instead of constructing an entirely new broadband network infrastructure, it has emerged as one of the rapid and economic technologies to interconnecting heterogeneous network to provide broadband access to subscribers. How to support ubiquitous real-time multimedia applications, especially in a heavy traffic environment, becomes a critical issue in modern CATV networks. In this paper, we propose a time guaranteed and efficient upstream minislots allocation algorithm for supporting quality-of-service (QoS) traffic over data over cable service interface specification (DOCSIS) CATV networks to fulfill the needs of realtime interactive services, such as video telephony, video on demand (VOD), distance learning, and so on. The proposed adaptive fast expansion algorithm and the loading statistics with dynamic swapping algorithm have been shown to perform better than that of the multimedia cable network system (MCNS) DOCSIS.