63 research outputs found

    Quantitative Evaluation of an Intercollegiate Distance Learning System

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    This paper reports on a distance learning system set up between eight educational institutions and tested through the “K3 Salon” series of lectures. The system is described and questionnaire responses to the K3 Salon lectures are presented. Results show that distance-learning lectures can be delivered to a sufficiently high quality and that respondents would like to be able to attend lectures from their own desks or their own homes.ArticleE-Learn 2009-World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education.2009(1):3563-3568(2009)conference pape

    Historical Characteristics of Education Portfolio Research from Keywords of Research Papers in ERIC

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    This paper is a report on the analysis of papers with keywords about portfolios in the ERIC Collection to make clear the history of educational portfolio research. Portfolios are regarded as an assessment tools for students in college in all years. As a result of the analysis, we have been able to classify portfolio research since 1975 into five stages: predawn, growth, peak, decrease and stabilization. In the early 1990s, portfolios changed greatly, as they went through digitalization, diversification and standardization. In the late 1990s, portfolios were scaled up from individuals to associations and organizations. More recently, an equilibrium has been reached between the appearance frequencies of the keywords “Portfolio Assessment” and “Portfolios (Background Materials)” and portfolios are used in the practical assessment of problem solving.ArticleE-Learn 2010-World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education .2010(1):2040-2045(2010)conference pape

    Quality Measurement of Two Phase Flow with Plug Flow

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    In order to control refrigeration cycles employing an injection system properly, it is important to detect quality of gas–liquid two-phase refrigerant in a two-phase region of the cycle. Although there are some techniques such as using a capacitance sensor or a X-ray beam scanning to measure a cross-sectional void fraction of the gas-liquid two-phase flow in a pipe, the measurement of the quality or flow rate of each phase is quite difficult since the liquid phase and gas phase of two-phase flow flowing in a pipe have different velocities in most cases. Meanwhile, the flow through a narrow tube becomes plug flow and the velocities of gas plug and liquid plug are almost the same. Therefore, the void fraction or quality of two-phase flow with plug flow in the narrow tube can be measured by detecting each plug length. Authors have examined the quality measurement of two-phase flow in the refrigeration cycle based on the plug flow characteristics. In previous studies, it was confirmed that the quality can be measured with an accuracy of about ±10% when the flow regime is plug flow in the narrow tube. However, the quality range where the flow regime becomes the plug flow is limited to the quality less than 0.1. In this study, multiple narrow tubes are installed with a gas bypass line to extend the quality range to be measured. Consequently, the measurable range of quality up to 0.8 was achieved with an accuracy of ±10%

    Development of an Analyzing System for Student’s Learning Characteristics by Visualization of Learning History

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    We have developed a system for visualizing students’ learning characteristics within a small learning group based on the learning data accumulated in the individual learning support system In this paper, we developed a program with both a server side and a client side in order to implement it as a Web application This makes it possible for the teachers to display a list of learning histories for all students in the class, analyze and understand the learning characteristics of any student in the classArticleE-Learn: World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education.2017(1):818-821(2017)conference pape
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