• Title, Summary, Keyword: challenging problems

Search Result 353, Processing Time 0.051 seconds

Application of '圓容三方互求' as a Mathematically Challenging Problem for Mathematically Gifted Elementary Students (초등 수학영재의 도전적 문제 상황을 위한 원용삼방호구(圓容三方互求)의 활용)

  • Chang, Hyewon
    • Journal for History of Mathematics
    • /
    • v.29 no.1
    • /
    • pp.17-30
    • /
    • 2016
  • This study focused on the selection and application of mathematical problems to provide mathematically challenging tasks for the gifted elementary students. For the selection, a mathematical problem from <算術管見> of Joseon dynasty, '圓容三方互求', was selected, considering the participants' experiences of problem solving and the variety of approaches to the problem. For the application, teaching strategies such as individual problem solving and sharing of the solving methods were used. The problem was provided for 13 mathematically gifted elementary students. They not only solved it individually but also shared their approaches by presentations. Their solving and sharing processes were observed and their results were analyzed. Based on this, some didactical considerations were suggested.

Parent-Implemented Behavioral Interventions for Challenging Behavior of Young Children with Developmental Disabilities: A Review of Effective Approaches

  • Park, Ju Hee
    • International Journal of Human Ecology
    • /
    • v.14 no.2
    • /
    • pp.25-40
    • /
    • 2013
  • Addressing challenging behavior in young children with special needs is an important issue. This study analyzed the results of literature on parent-implemented behavioral interventions designed to manage the challenging behavior of children with developmental disabilities under 8 years of age. Seventeen relevant studies published in peer-reviewed English journals during the last 15 years were selected for review. The literature review showed that adequately trained parents can serve as a competent intervention agent, thereby making significant contributions to mitigating children's behavior problems. The reviewed studies also demonstrated that parents could play a variety of important roles such as informants and trainers in behavioral interventions. However, the conclusions on parent-implemented behavioral intervention may be tentative rather than conclusive due to previous research limitations including the lack of treatment integrity and social validity data. In addition, this review discussed several implications for practitioners, indicated the limitations of the reviewed studies, and presented suggestions for future research.

Linearization of the Nonlinear Control Systems (비선형 제어 시스템의 선형화)

  • 이홍기
    • Journal of Institute of Control, Robotics and Systems
    • /
    • v.9 no.9
    • /
    • pp.651-657
    • /
    • 2003
  • Linearization is one of the most successful approaches nonlinear system control. The objective of this paper is to survey the recent results in linearization theory. It is hoped to be useful in understanding various linearization problems and challenging unsolved problems.

An Important Component on Using the What-If-Not Strategy

  • Seo, Hye-Sook
    • Research in Mathematical Education
    • /
    • v.2 no.1
    • /
    • pp.13-19
    • /
    • 1998
  • The What-If-Not strategy as proposed by Brown & Walter (1969) is one of the most effective strategies for problem posing. However, it has focused only on the aspect of algorithms for generating problems. The aim of this strategy and how it is used to accomplish the aim of the challenging phase are not clear. We need to clarify the aim of the What-If-Not strategy and to establish the process of the strategy for accomplishing the aim. The purpose of this article is to offer a new What-If-Not strategy by clarifying the aim of the challenging phase.

  • PDF

A Comparative Analysis of Research Trends in Occurrence, Prevention and Intervention of Challenging Behavior : Young Children with and without Disabilities (문제행동 발생과 예방 및 중재에 관한 연구동향 분석 : 일반유아와 장애유아 비교)

  • Yoo, Soo Ok;Lee, Soon Ja
    • Korean Journal of Child Studies
    • /
    • v.33 no.6
    • /
    • pp.187-205
    • /
    • 2012
  • In this study, 150 previous studies of young children's challenging behavior, conducted over the past 10 years, from 2003 to 2012, were selected. These studies were in relation to young children both with and without disabilities, and they were thus used for the purposes of comparative analysis. The major findings are as follows. First, research on challenging behavior not only of young children with disabilities but also of those without disabilities has been an increasing trend from 2008. While most studies of those without disabilities were based on observations by parents or teachers using a variety of tools, studies regarding those with disabilities mainly used single-subject research methods using an operational definition. Second, the bulk of the studies of young children without disabilities were focused on interaction between various children's internal variables and a variety of parent-related variables related to the occurrence of challenging behavior. In comparison, studies of young children with disabilities were focused excessively on direct intervention after the occurrence of problems. Regarding those without disabilities, the interaction between children's temperament, internal variables, and their mothers' parenting behavior, external variables were the main areas of interest for these researchers. There is clearly a growing need for more active research aimed at the prevention of challenging behavior. Challenging behavior in early childhood has an influence not only on each child's present and future academic achievement levels and their quality of life but also on the quality of instruction in classroom available to all children.

Development and Valididation of the Teacher Strategy Questionnaire : Addressing Challenging Behaviors of Preschool Children (유아 문제행동 지도전략 척도-교사용(TSQ)의 개발과 타당화 연구)

  • Kim, Yeon Ha
    • Korean Journal of Child Studies
    • /
    • v.28 no.5
    • /
    • pp.73-89
    • /
    • 2007
  • The purpose of this study was to develop a reliable and valid instrument to assess Korean teachers' strategies for addressing challenging behaviors of preschoolers. The Teacher Strategy Questionnaire(TSQ) consisting of 34 items was developed with three theoretically driven factors(positive proactive, positive reactive, and negative reactive strategies). Participants were 238 preschool and daycare center teachers who responded to the TSQ. Validity and reliability of the TSQ were explored using Cronbach's $\alpha$, item analysis, and factor analyses. The reliability of the TSQ was relatively high, ranging from .74 to .85. No item needed to be eliminated. Among the three pre-structured factors of the TSQ, one positive proactive factor was identified as having two innate factors.

  • PDF

Telecommunication Network Optimization Current Status and Challenges (통신망 최적화 연구 동향)

  • Park, Kyungchul;Lee, Heesang
    • Journal of Korean Institute of Industrial Engineers
    • /
    • v.34 no.1
    • /
    • pp.13-22
    • /
    • 2008
  • This paper gives reviews on current research status in telecommunication network design. Two problems are identified as major research issues. One is the WDM network design problem, where traffic grooming, virtual topology design and routing and wavelength assignment problems are considered. The other is the OSPF weight setting problem which was proposed as a practical method to implement traffic engineering capability in IP networks. After presenting surveys on those problems, we discuss potential challenging research issues in telecommunication network design.

Problems of Internet-based Distance Learning (인터넷 원격교육의 문제점에 관한 조사연구)

  • Nam Sang-Zo
    • Proceedings of the Korea Contents Association Conference
    • /
    • /
    • pp.284-288
    • /
    • 2005
  • Internet-based distance learning is proliferated, but justifying its educational effectiveness is challenging. Investigation into the problems is important and fundamental for the study on the educational effectiveness. In this study, problems of Internet-based distance learning are structured by four categories as environmental problems, student problems, course design problems and operational problems. Based on a survey of distance education participants, problems are analysed. Also, analysis from the point of demographic differences such as sex, job existence and age is performed.

  • PDF

The Function of Creativity in the Solutions of Irregular Sequence Problems among Elementary School Mathematics Teachers and Teacher-Trainees in other Disciplines

  • Gazit, Avikam;Patkin, Dorit
    • Research in Mathematical Education
    • /
    • v.13 no.4
    • /
    • pp.309-330
    • /
    • 2009
  • The article aims to present findings of a study which has examined the ability of elementary school mathematics teachers and of teacher-trainees in other disciplines to solve irregular challenging problems of sequences in general rather than numerical sequences only. The findings show that mathematics teachers succeed to cope with unusual assignments when the requirements of the problems presented to them are analogous to irregular problems. However, when the problems require a change in the thinking procedure in the direction of creative thinking, there is a considerable decrease in performance. Another finding shows that, although teacher-trainees succeed less in solving the presented problems, they give incorrect solutions which do indicate creative thinking. An inevitable conclusion based on the research findings is that teacher training institutions should enhance and reinforce multi-directional. branching out and creative thinking competences.

  • PDF

QUICKEN THE PACE OF DEVELOPING NUCLEAR ENERGY IN CHINA

  • Zhongmao, Gu
    • Proceedings of the Korean Radioactive Waste Society Conference
    • /
    • /
    • pp.143-149
    • /
    • 2004
  • China is facing the challenging problems in both the potential energy resource shortage and the serious environmental pollutions. The author suggests that nuclear energy could play an important role for ensuring the long term energy security in China. The technical problems to be solved for the sustainable development of nuclear energy in China are also discussed and the R&D work in next 20 years are briefly suggested to meet the requirements of nuclear energy development in China.

  • PDF