• Title, Summary, Keyword: 이질성검증

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A Study on Systematic Review of Learning with a Robot (로봇활용교육의 체계적 문헌고찰에 관한 연구)

  • Kim, Chul
    • Journal of The Korean Association of Information Education
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    • v.17 no.2
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    • pp.199-209
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    • 2013
  • The study is to review the effects of learning with a robot among regular courses of elementary and middle schools so that the research method of systematic review for papers from 2001 and 2013 was conducted. The database for review were KISS, DBpia, and E-article and it was searched with two options of 'robot & education' and 'learning with a robot'. Initially, 481 papers were searched; but finally 50 were selected after monitoring and extraction execution in line with protocol. Great volume of researches focused on academic skill such as a creativity, problem solving skills and as for research methods, Pretest-Posttest Control Group Design and t-test took the lion's share. As for educational effects, improvements of course interest, immersion, attitude, motivation, creativeness and problem solving skills were identified; but in some researches, insignificant research outcomes were reported. Based on analysis results, considerations for learning with a robot were suggested.

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IE-SASW Method for Nondestructive Testing of Geotechnical Concrete Structure : I. Numerical Studies (콘크리트 지반구조물의 비파괴검사를 위한 충격반향-표면파병행기법 : I. 수치해석적 연구)

  • 김동수;서원석;이광명
    • Journal of the Korean Geotechnical Society
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    • v.18 no.4
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    • pp.257-270
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    • 2002
  • The Impact-Echo(IE) method has been used to evaluate the integrity of concrete structures. In this method, the P-wave velocity of concrete is a crucial parameter in determining the thickness of concrete lining, the location of cracks or other defects. In many field applications of the IE method, the P-wave velocity is obtained by testing the core or the portion of a structure where the exact thickness is known. Occasionally, however, the core can not be obtained in specific structures and the P-wave velocity determined from core testing may not be a representative value of the structure. This study introduces an IE-SASW method that may determine the P-wave velocity on a surface of each testing area using the Spectral Analysis of Surface Wave (SASW) method. Results obtained from numerical studies are presented in this paper (Part I), and results obtained from experimental studies are presented in the companion paper (Part II). In this paper, numerical analyses using ABAQUS were carried out to investigate the effectiveness and the limitations of the IE-SASW method.

The Effect of Intuitive Free Association and Systematic Free Association on the Creativity of High School Students Group in the Conceptual Design Process (직관적 및 체계적 자유연상기법이 개념설계과정에서 고등학생 집단의 창의성 향상에 미치는 효과)

  • Mheen, Se-Kee;Choi, Yu-Hyun
    • 대한공업교육학회지
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    • v.34 no.1
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    • pp.129-154
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    • 2009
  • The purpose of this study was to find the effect of intuitive free association and systematic free association on the creativity of high school students group in the conceptual design process. Based on this study result, the conclusion can be summarized as follows. 1. There was meaningful relation between intuitive free association and creativity factor of high school students. Mean value of experimental group A 's creativity and it's factor originality, practicality, elaboration, and fluency which treated intuitive free association was increased. 2. There was meaningful relation between systematic free association and creativity factor of high school students. Mean value of experimental group B 's creativity and it's sub factors: originality, problem solving, elaboration, and fluency which was treated systematic free association was increased. 3. It was found that two different divergent thinking does not show any meaningful difference in creativities of two groups. However, the meaningful difference was found in post creativity test in each groups sub-factors. There was meaningful difference in practicality factor, though there was no meaningful difference in originality, elaboration, fluency factors. Using the obtained results, it was concluded that intuitive thinking and systematic thinking play different roles in practicality which is one of sub-factors of the creativity of high school students. Consequently, it can be concluded that systematic thinking which leads students to take a step to solve a given problem can elicit more scientific thinking, and helps students create more practical solution in problem solving than intuitive thinking that emphasize the quantitative aspect of ideas.

The Development of an Agent-Based Model for Simulating Self-Controlled Team Building Behavior (에이전트 기반 자율적 팀 결성 행동 시뮬레이션 모형의 개발)

  • Yee, Soung Ryong
    • Journal of Digital Convergence
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    • v.15 no.2
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    • pp.335-345
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    • 2017
  • It is necessary for an instructor to understand the student's team building behavior for an effective guidance of team activities. In this study, we developed an agent-based computational model for simulating the student's self-controlled behavior. We validated the model by comparing the actual behavior. Through the simulation, we found that the time to stabilization of team formation and the ratio of the students having no team are decreasing as the population of the student increases. However, we also found that over a certain amount of population, the time and the ratio do not show much progress in the difference. The simulation also shows that the more heterogeneity between the students the higher chance of delaying the team formation and increasing the ratio. We expect to use the model as a tool for guiding and supporting students' team activities.

A Meta-Analysis on the Effect of Music Intervention on the Anxiety of Children and Adolescents (음악중재가 아동 및 청소년의 불안에 미치는 효과에 대한 메타분석)

  • Bae, Ik-lyul;Kim, Min-woong
    • The Korean Journal of Stress Research
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    • v.25 no.2
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    • pp.86-92
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    • 2017
  • The present study investigated the effect of music intervention on the anxiety of children and adolescents using meta-analysis, and the specific research purposes were as follows. The targets of the present study were previous studies analyzed the effect of music intervention on anxiety collected the final 28 theses for academic degrees and five scholarly journal articles were used in the analysis. To examine the publication bias of the studies used in the analysis, funnel plot and fail-safe N were verified, and found the publication bias was not significant enough to influence the present study. The homogeneity test showed that the effect size was heterogeneous, and accordingly, a random effect model analysis was carried out and the overall effect size was found to be -1.034. The analysis on the difference in the effect showed that the effect size varied according to subject classification and intervention location for categorical variables and size for continuous variables.

Development of MDA-based Subsurface Spatial Ontology Model for Semantic Sharing (시멘틱 공유를 위한 MDA기반 지하공간정보 온톨로지 모델 개발)

  • Lee, Sang-Hoon;Chang, Pyoung-Wuck
    • Journal of Korean Society for Geospatial Information System
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    • v.17 no.1
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    • pp.121-129
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    • 2009
  • Today, it is difficult to re-use and share spatial information, because of the explosive growth of heterogeneous information and specific characters of spatial information accumulated by diverse local agency. A spatial analysis of subsurface spatial informa-tion, one of the National Spatial Data Infrastructure, needs related spatial information such as, topographical map, geologic map, underground facility map, etc. However, current methods using standard format or spatial datawarehouse cannot consider a se-mantic hetergenity. In this paper, the layered ontology model which consists of generic concept, measuremnt scale, spatial model, and subsurface spatial information has developed. Also, the current ontology building method pertained to human experts is a expensive and time-consuming process. We have developed the MDA-based metamodel(UML Profile) of ontology that can be a easy under-standing and flexiblity of environment change. The semantic quality of devleoped ontology model has evaluated by reasoning engine, Pellet. We expect to improve a semantic sharing, and strengthen capacities for developing GIS experts system using knowledge representation ability of ontology.

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The Impact of Latent Attitudinal Variables on Stated Preferences : What Attitudinal Variables Can Do for Choice Modelling (진술선호에 미치는 잠재 심리변수의 영향: 초이스모델링에서 심리변수의 역할)

  • Choi, Andy S.
    • Environmental and Resource Economics Review
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    • v.16 no.3
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    • pp.701-721
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    • 2007
  • A key issue in the development and application of stated preference nonmarket valuation is the incorporation of unobserved heterogeneity in utility models. Two approaches to this task have dominated. The first is to include individual-specific characteristics into the estimated indirect utility functions. These characteristics are usually socioeconomic or demographic variables. The second employs generalized models such as random parameter logit or probit models to allow model parameters to vary across individuals. This paper examines a third approach: the inclusion of psychological or 'latent' variables such as general attitudes and behaviour-specific attitudes to account for heterogeneity in models of stated preferences. Attitudinal indicators are used as explanatory variables and as segmentation criteria in a choice modelling application. Results show that both the model significance and parameter estimates are influenced by the inclusion of the latent variables, and that attitudinal variables are significant factors for WTP estimates.

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The evaluation of methodological quality of meta-analysis studies in speech language pathology using AMSTAR (AMSTAR에 기반한 국내 언어치료 분야 메타분석 논문의 방법론적 질평가)

  • Han, Minju;Byeon, Haewon
    • Journal of the Korea Convergence Society
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    • v.11 no.2
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    • pp.161-165
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    • 2020
  • Although research using meta-analysis is increasing in the field of rehabilitation science, not all meta-analytical papers are of the same quality. In particular, although meta-analysis is a research method with the highest level of evidence, it may be possible to derive distorted conclusions or alternatives by simply integrating representative values without considering heterogeneity among individual studies. This study analyzed the current status of meta-analysis papers on the subject of language arbitration published in Korea from January 2010 to June 2019, and used A Measurement Tool to Assess the Methodological Quality of Systematic Review (AMSTAR). As a result of evaluating the methodological quality of the final five papers, the average of 7.4 points out of 11 points was found above average. In order to raise the qualitative level of Meta-analysis in speech-language pathology in the future, it is necessary to include verification of publication bias and specification of conflicts of interest.

A Study on Proposal of Landscape Management Improvement on the Quantitative Analysis of National Parks (국립공원(國立公園) 자연경관(自然景觀)의 계량적(計量的) 분석(分析)을 통(通)한 경관관리(景觀管理) 개선방안(改善方案)에 관(關)한 연구)

  • Kim, Sei Cheon
    • Journal of Korean Society of Forest Science
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    • v.80 no.1
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    • pp.32-41
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    • 1991
  • This study is focusted to the national park of Korean typical mountain Chi-ri, its visual resources of forests, and practiced inspectind course by way of hypothesis and tests, to show visual resource management objectively, and that of quantitative basic data. spatial image structure measured by Semantic Differential(S.D.) Scale was shown through factor analysis algorithm for the analyzing psychological amount and examined the flowing out of decisive factor and the objective importance related mutual factors by appling the measurement of visual quality. Also, it has been investigated the differences between the degrees of expectation which is used before and of satisfaction which is used, by appling instrumental expectation theory. And showed patterns of investigation area through factor analyzing algorithm. As a national Park, visual factors that have natural landscape harmonized forest, sky, surface of the water, curious stones and rocks, temples should be escalate their values affirmatively so as to be the scenery of pointed direction and enjoyable, and it is needs the techniques visual resource management and its controlling technique to make artificial structures more intentional planning and systemical setting. Manmade distinctive quality in the spatials that affect complementally or harmonizingly, should be received considering relations between the distifution and joining which in line with various visual presenting massive factors. More than that, it is needed united basic standard to the beauty of arrangements which contain visual continuity considered balance between nature and human work, simplicity of structural types, assimilation, emphasis, unification of different factors and pro rata.

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Implementation of the Metadata Registry-based Framework for Semantic Interoperability of Application in Ubiquitous Environment (유비쿼터스 환경에서 어플리케이션의 의미 상호운용성을 위한 메타데이터 레지스트리 기반의 프레임워크 구현)

  • Kim, Jeong-Dong;Jeong, Dong-Won;Kim, Jin-Hyung;Baik, Doo-Kwon
    • Journal of the Korea Society for Simulation
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    • v.16 no.1
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    • pp.11-19
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    • 2007
  • Under ubiquitous environment, applications can gather and utilize various sensing information. There are many issues such as energy management, protocol standardization, independency on sensor fields, and security to be resolved for the complete ubiquitous computing. Especially, the independent information access in the sensor field is one of the most important issues to maximize the usability of sensors in various sensor fields. However, existing frameworks are not suitable for the ubiquitous computing environment because of data heterogeneity between data elements in sensor fields. Existing applications are dependent to sensor fields and sensors in the existing ubiquitous computing on environment is dependent to the application in the sensor field. In other word, an application can utilize just information from a specific sensor field. To overcome this restriction, many issues from a hardware or software view must be resolved. In this paper, we provide the design and implementation of the Metadata Registry-based framework (UbiMDR) of the Ubiquitous environment. This framework can provides the semantic interoperability among ubiquitous applications or various sensor fields. In addition, we describe comparison evaluation between conventional Ubiquitous computing framework and UbiMDR framework with data accuracy of interoperability.

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