• Title/Summary/Keyword: Problem solving activity

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Comparative Study on Antioxidative Effects of Mori Ramulus and Mori Cortex (상지(桑枝)와 상백피(桑白皮)의 항산화효과 비교 연구)

  • Cha, Yun-Yeop
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.21 no.4
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    • pp.934-939
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    • 2007
  • In recent year, We are concerned about anti-aging, disease-prevention, longevity, so many methods are used in solving this problem. And Those are related with antioxidative ability. Recently, We heard that Mori Cortex was known to reduce the hypertension and was helpful in promoting health, and Mori Ramulus was effective against obesity, etc. So, This study was performed to investigate the antioxidative effect of hot-water extracts of Mori Cortex and Mori Ramulus used for 3 methods, those are DPPH radical scavenging activity, Nitric oxide(NO) radical scavenging activity and Bovine serum albumin(BSA). And we compared Mori Cortex and Mori Ramulus on Antioxidative Effects. The results of this study were as follows: We measured levels of DPPH radical scavenging activity and Nitric oxide(NO) radical scavenging activity. And we obtained results that Mori Ramulus was most effective with the concentration of 5 $mg/m{\ell}$, and Mori Cortex was most effective with the concentration of 2.5 $mg/m{\ell}$, And we examined the antioxidative effects of Mori Ramulus and Mori Cortex with $CU^{2+}/H_20_2$-induced Bovine serum albumin(BSA). And we obtained that antioxidative ability was increased after 1.25 $mg/m{\ell}$ and that was most effective with the concentration of 5 $mg/m{\ell}$ on both of them. And antioxidative ability of Mori Cortex was better than Mori Ramulus(p<0.05). So I guess that hot-water extracts of Mori Ramulus and Mori Cortex have effects on antioxidative ability, but Mori Cortex is better than Mori Ramulus on antioxidation. Hereafter we need differential experimental methods of antioxidative effect on both of them.

A Study on Development of Energy Education Materials for Middle School Students (중학교용 에너지 교육 자료 개발 연구)

  • 최돈형;이양락
    • Hwankyungkyoyuk
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    • v.7 no.1
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    • pp.46-87
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    • 1994
  • Our country has been consuming a huge amount of energy in the course of industrialization and its demand is expected to increase enormously in the future. However, the deposits of energy resources are so limited that the settlement of energy problem comes up the essential subject. To solve the energy problem, it is requested that new resources to gain energy stably should be developed and also energy should be economized and used effectively. The effective use of energy and an the wisdom of economy in energy are requested to everybody and these things should be habitualized from very young age through education. Nevertheless, almost every school in our country hasn’t been concerned about energy education. Even though they have a concern, they are very short of the energy education materials and the quality of the materials is not so good. Therefore it is very meaningful to the settlement of energy problem of the country to make the students who will lead our country to make the students who will lead our country in the future realize the seriousness of energy problem and to provide them the necessary knowledge and methods to solve this problem so that they practice those things in everyday life. Having these necessities, this research, supported by The Korea Energy Management Corporation(KEMCO), was performed for 8 months from April 17, 1994 to December 17, 1994. Many peoples participated in this study such as 30 staffs of researchers and authors, 5 staffs of photographers and illustrators, and 3 VCR program producers developing an energy education material set for middle school students that includes a printed material for student, a diskette for computer simulation, a teacher's guidebook, VCR material and its guidebook. The following main development direction was established : First, the material for student should be consisted of units that let students know the seriousness of energy problem. Second, the focus should be put on the necessary method and practice to economize energy actually in real life based on the basic knowledge learned in elementary school. Third, material for student should be consisted of modules to be student activity-oriented teaching-learning rather than lecture-oriented one. The activity, to maximize student's interests, should be presented in various forms such as experiments, investigation, play, data interpretation, computer simulation, visits, expression and appreciation, etc. To develop the energy education materials for middle school students, a research plan was made first. After literature review about domestic and foreign energy education materials, several research trips home and abroad, and discussion meetings, the basic theory of energy education such as the principle, objective, contents, teaching-learning method, and evaluation method was established. Material for student was developed through the following procedures : The activities in the existing energy education materials were analysed and were divided into four categories related to energy using places of home, school, community, and country, and which were again divided into three categories related to time of past, present, and future, Considering these division, nine modules which are structure units of material for student were chosen, Each module comprises 2-4 activities. Totally 31 activities were designed in this way. The syllabi were made out for each activity and writing was asked for to experts related to each activity after several discussions and revision. To complement the draft, another several discussions and revision were also made on it and then pictures and illustrations were asked for. All these procedures complete the material for student, titled ; Energy Inquiry of Middle School Students', which totals 129 pages and is all in color. As the manuscript of material for student was fixed, writing for teacher's guidebook was asked for to the same writers. The draft of teacher's guidebook was also complemented through the several concentrated works and discussions. Teacher's guidebook focused on the teaching-learning principle and methods of energy education and on the concrete instruction cases for effective instruction of material for student. It is organized with two parts : the one is 'general outline' which introduces theoretical contents and the other is 'details' which are practically helpful to teaching-learning. It is totally 131 pages including both 'general outline' and 'details'. The VCR material and its guidebook consist of contents that cultivate the good attitude trying to economize energy and raise student's interests with a purpose of strong motivation to recognize the necessity of economy and practice it. After establishing development direction of VCR material through discussion meetings and research trips, its script was made by relevant experts. Then the script was also reviewed two times. The drafted VCR material made by a video material developing expert was examined and modified by previews twice. After completion of VCR material, the VCR guidebook was made. All these procedures led to the development of VCR material which runs 20 minutes in VHS type. The VCR guidebook shows a production purpose of the program, structure of contents, evaluation methods, and contents of the program in detail to give help to instructors when they use this VCR material, When these energy education materials are used, it is desirable that the VCR material should be presented first to induce student's motive, and then material for student is introduced Since the material for student is composed of activity-oriented modules and each module is independent one another in general, and each activity is, too. the necessary module or activity can be chosen and utilized in any order according to school or class conditions. This energy education materials will contribute to the development of student's ability to solve energy problem in everyday life and teacher's ability to teach the fundamental knowledge and method in solving energy problem.

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Development of Program for Discretionary Activity Focused on Multiple Activity with Everyday-Life Materials to Enhance Scientific Creativity for Grade 6-7 Students and Exploring the Influence (과학창의력 신장을 위한 ‘일상생활 소재 다중활동’ 중심의 6~7학년 ‘재량활동’)

  • 김형석;정용재;곽성일;하은선;이선양;이현정
    • Journal of Korean Elementary Science Education
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    • v.23 no.4
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    • pp.344-356
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    • 2004
  • In this study, we developed the program for 'Discretionary Activity' focusing on the multiple activities with everyday-life materials to enhance scientific creativity (MAEM-SC), which was specifically for students in the 6-7th grade according to the 7th curriculum in Korea. As important factors for scientific creativity, we selected the ability to find out the context relevant to scientific problems, the ability to connect the problem context to scientific knowledge, the ability to invent the ways to solve the problem scientifically, and ability to concentrate on the scientific problem solving activity. The topics of the program were drawn from common and familiar things in our everyday contexts, such as human body, everyday tools, food, play and toys, and everyday episodes. The multiple activities here mean the activities which are systematically constructed with the various types of activities with a specific intention. The multiple activities were designed in three types, that is, series type, parallel type, and combination type. Each of them consists of the several activities as follows: estimating and measuring, carrying out an experiment using body, inventing implement (tools), thinking statistically, writing creatively with scientific themes, and connecting one concept to another concept etc. Through a trial of the program, we found that this program has some positive influence on the enhancement both of the ability to find out the context relevant to scientific problems and the ability to connect it to the students' existing scientific knowledge.

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Action Plans of Green r-Learning Services based on UCR(User Created Robots) (창작로봇(UCR) 기반 친환경 r-러닝 서비스 실천방안)

  • Kim, Jin-Oh;Han, Jeong-Hye
    • Journal of Information Technology Services
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    • v.10 no.3
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    • pp.21-30
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    • 2011
  • Expectation for improvement of creativity and problem-solving capability has increased the creative robotics classes in the form of after-school activity in more than half of total elementary schools. While Ministry of Education, Science and Technology has promoted 'Green IT Guidelines' as a part of 'Eco-friendly Green School Development Project', the Green issues have not been considered enough in those creative robotics classes. In this paper, we would like to address the Green issues, especially in the r-Learning services based on UCR (User Created Robots). First, trend of green IT education, r-Learning services and UCR are reviewed. And the current status of eco-related operations and teachers' perception in the robotics classes of elementary schools is investigated. Examples of Green UCR are also searched and green programs based on the three kinds of UCR, UC-TR, UC-AR, UC-CR, are explored. Finally, we propose action plans to promote the UCR-based r-Learning service reflecting green issues.

Optimization of a 3-Class-based Dedicated Linear Storage System (3지역/ 지정위치 일차선형 저장시스템의 최적화)

  • Yang, Moonhee;Kim, Sun-uk
    • Journal of Korean Institute of Industrial Engineers
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    • v.30 no.3
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    • pp.190-196
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    • 2004
  • In this paper, we address a layout design problem, PTL[3], for determining an optimal 3-class-based dedicated linear storage layout in a class of unit load storage systems. Our objective is to minimize the expected single command travel time. We analyze PTL[3] to derive a fundamental property that an optimal solution to PTL[3] is one of the partitions based on the PAI(product activity index)-nonincreasing ordering. Using the property and partial enumeration, we construct an efficient exact algorithm with O $(n\;{\lceil}\;log\;n\;{\rceil}\;)$ for solving PTL[3].

An Implementation of Project-Based Learning for Routing Design Course

  • Lee, Sang-Gon
    • Journal of information and communication convergence engineering
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    • v.7 no.4
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    • pp.570-575
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    • 2009
  • This paper describes an implementation of project-based learning in routing design course. The total students who enrolled in the class were 48 and were divided into groups of 3~4 students. At the beginning of the course, a survey was conducted to check the student's level of back ground knowledge acquired from the prerequisite courses. At the end of the curse, we also conducted a survey to evaluate the effect of project-based learning. According to the end of course survey, the course was helpful to identify the problems to solve by themselves, to develop the problem solving ability, and to understand the global picture of the subject by integrating knowledge of each chapter into a project. The survey also shows that students recognized the importance of the teamwork skill throughout the project activity.

A Study on The Application of Inclusion-Exclusion Method in Soma Cube Activity (소마큐브(Soma Cube) 활동에서 포함-배제 방법의 활용에 대한 연구)

  • Shim, Sang-Kil;Hwang, Sun-Wook
    • The Mathematical Education
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    • v.48 no.1
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    • pp.33-45
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    • 2009
  • The purpose of this article is to study characteristics of Soma Cube in combinatorial-geometric point of view, and to present basic substances and direction for efficient Soma cube activities in school mathematics upon systematical analysis of methods of finding solutions using Inclusion-Exclusion Method. We can apply Inclusion-Exclusion Method to find all possible solutions in Soma Cube activities not as trial-and-error method but as analytical method. Because Inclusion-Exclusion Method can reduce the number of problem-solving variables by making high conjunction in the choice of pieces. Soma cube pieces can be sorted as 'flat' ones and 'non-flat' ones, which would be another effective method in the manipulation of Soma Cube pieces.

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The Effects of NIE on Statistics Learning of Elementary School (초등학교 통계 영역에서 NIE를 통한 학습이 학업성취에 미치는 효과)

  • Seo, Ji-Young;Pyo, Yong-Soo
    • Journal of the Korean School Mathematics Society
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    • v.13 no.4
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    • pp.499-524
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    • 2010
  • In this paper, we applied NIE(Newspaper In Education) to the course of study for statistics unit of elementary mathematics which can improve students' abilities of concept of statistics, analyzing data and problem solving so they can do these with direct activity by themselves and find out how NIE effects on children's learning achievement for statistics unit and more effective solution for the course of study for elementary mathematics.

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A Study on the Status and Promotion of Youth Activities - Jeollanam-do around the training institutions - (청소년 수련활동의 실태 및 활성화 방안에 대한 연구 - 전라남도 수련기관을 중심으로 -)

  • PARK, Jong-Un;BAN, Gun-Woo
    • Journal of Fisheries and Marine Sciences Education
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    • v.28 no.3
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    • pp.769-779
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    • 2016
  • This study aims to examine the operation of a free semester system geared towards meeting education user needs by researching on youth training activities, a method of fostering talents to be equipped with the 21st-century society-required creativity, innovation ability, cooperation spirit and leadership, communication ability, problem-solving power, and venturing spirit, among other key capabilities. Thus, targeting seven public and private youth training facilities in Jeollanam-do, user satisfaction with ongoing youth training activities and achievement levels were surveyed so that problems of training facilities could be identified and improvement measures could be presented so as to ensure education that can satisfy both education providers and users.

Teachers' Values about Teaching Mathematics in Classrooms, Implementing Lesson Study and Open Approach: a Thai Experience

  • Kadroon, Thanya;Inprasitha, Maitree
    • Research in Mathematical Education
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    • v.15 no.2
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    • pp.115-126
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    • 2011
  • The aim of this study was to explore teachers' values about teaching mathematics in the classrooms which implemented Lesson Study and Open Approach as a teaching approach. The targeted group was 83 school teachers from 4 schools participating in a teacher professional development project. The data was gathered through teacher questionnaires, lesson observations and interviews. Data analysis is based on Bishop's (1988; 2003; 2007) and Komin's (1990) frameworks. The results from the implementation of Lesson Study and Open Approach in Thai classroom found the different of the roles and behaviors of teachers and students in classroom. The results revealed 3 kinds of values about teaching: Mathematical values, General educational values, Mathematics educational values and also found that most of the teachers valued problem solving as an innovative teaching approach as against traditional approaches they were familiar with.