• Journal of applied mathematics & informatics
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• 제41권5호
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• pp.973-988
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• 2023

In real-life scenarios, we may have to deal with real numbers or numbers in intervals or a combination of both to solve multi-criteria decision-making (MCDM) problems. Also, we may come across a situation where we must combine this interval and actual number membership values into a single real number. The most significant factor in combining these membership values into a single value is by using aggregation operators or scoring algorithms. To overcome such a situation, we suggest the cubic hypersoft set (CHSS) concept as a workaround. Ultimately, this makes it simple for the decision-maker to obtain information without misconceptions. The primary aim of this study is to establish some operational laws for the cubic hypersoft set, present the fundamental properties of aggregation operators and propose an algorithm by using the technique of order of preference by similarity to the ideal solution (TOPSIS) technique based on correlation coefficients to analyze the stress-coping skills of workers.

• Journal of applied mathematics & informatics
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• 제40권5_6호
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• pp.897-914
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• 2022

Pythagorean fuzzy sets (PFSs) are capable of modelling information with more uncertainties in decision-making problems. The essential feature of PFSs is that they are described by three parameters: membership function, non-membership function and hesitant margin, with the total of the squares of each parameter equal to one. The purpose of this article is to suggest some new similarity measures and weighted similarity measures for PFSs. Numerical computations have been carried out to validate our proposed measures. Applications of these measures have been applied to some real-life decision-making problems of pattern detection and medicinal investigations. Moreover, a descriptive illustration is employed to compare the results of the proposed measures with the existing analogous similarity measures to show their effectiveness.

• 한국수학교육학회지시리즈A:수학교육
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• 제49권1호
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• pp.39-51
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• 2010

The purpose of this article is to study students' responses to non-routine problems which are presented by using solely numerals or symbolic figures. Such figures have no mathematical meaning but just symbolical meaning. Most students understand geometric figures more concrete objects than numerals because geometric figures such as circles and squares can be visualized by the manipulatives in real life. And since students need not consider (unvisible) any operational structure of numerals when they deal with (visible) figures, problems proposed using figures are considered relatively easier to them than those proposed using numerals. Under this assumption, we analyze students' problem solving processes of numeral problems and figural problems, and then find out when students' difficulties arise in the problem solving process and how they response when they feel difficulties. From this experiment, we will suggest several comments which would be considered in the development and application of both numerical and figural problems.

• 한국수학사학회지
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• 제33권1호
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• pp.1-19
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• 2020

Under 2009 Revised Mathematics Curriculum and 2015 Revised Mathematics Curriculum, mathematics teachers can help students inductively express real life problems related to sequences but have difficulties in dealing with problems asking the general terms of the sequences defined inductively due to 'Guidelines for Teaching and Learning'. Because most of textbooks mainly deal with the simple calculation for the sums of sequences, students tend to follow them rather than developing their inductive and deductive reasoning through finding patterns in the sequences. In this study, we reconstruct 8 problems to find the sums of sequences in MukSaJipSanBup which is known as one of the oldest mathematics book of Chosun Dynasty, using the terminology and symbols of the current curriculum. Such kind of problems can be given in textbooks and used for teaching and learning. Using problems in mathematical books of Chosun Dynasty with suitable modifications for teaching and learning is a good method which not only help students feel the usefulness of mathematics but also learn the cultural value of our traditional mathematics and have the pride for it.

• 한국환경교육학회지:환경교육
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• 제18권1호
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• pp.44-54
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• 2005

This study is intended to examine an effectiveness of STS module concerning food waste, 'Even if food waste is the money, would you throw it away', in the areas of affective domains related to science and attitudes towards environmental problems. For this study, one group of 142 seventh graders attending 'L' middle school in Iksan city, Jeonrabukdo received 8 class hours with this module. Their affective domains related to science and attitudes towards environmental problems were measured by pre- and post-test design in a single group. In addition, their views on STS instruction was also analyzed. Results are as follows. Students in the transition period who had been taught with this module showed that they had a statistically significant effectiveness in interests related to science, scientific attitudes and execution towards environmental problems(p<.05). Students taught with this module had a positive views on the STS instructional methods or contents. It was also shown that their recognition or behavior towards environmental problems have been changed positively.

• 한국가정과교육학회지
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• 제28권2호
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• pp.51-59
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• 2016

본 연구에서는 교육부 고시 교육부 고시 '2015 개정 실과(기술 가정) 교육과정' 내용체계 중 "자원관리와 자립" 영역의 핵심개념인 "관리"와 "생애설계"에 대한 이론적 기초를 살펴보았다. 먼저 "관리"영역과 관련해서는 전통적인 가정관리의 이론적 토대인 체계이론에 대한 내용을 살펴보았으며 이러한 체계이론이 2015년 개정교육과정 내에서는 어떻게 반영되고 있는지를 진단한 결과 현 교육과정의 중학교 내용요소들은 중학생들의 실생활에서 직면하고 있는 생활관련 문제들을 통합적으로 포괄하고 있지 않으며 선별된 내용 요소들 또한 여러 가지 문제 상황 중에서 어느 정도 우선순위를 가지고 있는지 확신하기 어려운 부분이 있다. 다음으로 생애설계의 경우 진로지도에 부합하여 생애설계의 중요성을 강조하고 있기 때문에 발달과업을 비롯하여 가치관, 직업, 건강 등 매우 포괄적인 영역을 망라하여 생애설계의 대한 내용을 언급하고 있지만 2015 개정 교육과정에서는 국제적인 트렌드인 재무설계에 대한 중요성을 간과하고 있다는 사실은 다소 아쉬운 부분이다.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2002년도 11월 학술대회지
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• pp.51-59
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• 2002

This article discusses the teaching of listening and reading skills through enhancing the awareness of pronunciation. First, it examines the problems which take place in listening comprehension, and seeks the ways in which we can teach the skill rather than simply practise it. The approaches proposed are based on micro-listening exercises which practise individual subskills of listening, especially by using the cloze test and tracking. The issue of using authentic materials is then examined for teaching recognition of the features of natural speech. Finally, it is argued that classroom activities need to take account of the true nature of real-life L2 listening.

• Journal of applied mathematics & informatics
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• 제26권1_2호
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• pp.307-316
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• 2008

Real life problems can be expressed as a congruence modulus n and split into a system of congruence equations in modulus factors of n. A system of congruence equations can be combined into a congruence equation under certain conditions. This paper uniquely presents and critically reviews the generalized Chinese Remainder Theorem (CRT) for combining systems of congruence equations into single congruence equations. Sequential and parallel implementation strategies of the generic CRT are outlined. A variety of unique applications of the CRT are discussed.

• 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.

• 한국생산제조학회지
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• 제19권4호
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• pp.485-490
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• 2010

Recently, environment problems have effects on the electronic equipments. Security problems are presented. For security reasons, it is necessary to study electronic equipments. In this paper, we handle the Elasticity modulus on the polymer insulator by UV irradiation. The types of material are used in this experiment, is the EPDM (Ethylene Propylene Diene Monomer). For increasing the reliability, real material specimens are used. For this study, we used ESPI (Electronic speckle pattern interferometry), UTM (Universal thesting machine) device, Accelerated weathering tester. Through this measurement, we evaluated how much UV irradiation has effect on polymer insulator and how long does it take to change the polymer insulator. Also this paper will give a help in electronic industry and the method of measuring the insulator elasticity modulus of polymer could be utilized in life estimation and replacement time of the products of electronic equipment that is used in real industrial fields.