Comparing learning outcomes of video-based e-learning with face-to-face lectures of agricultural engineering courses in Korean agricultural high schools

This study investigated the effectiveness of e-learning by comparing the learning outcomes in conventional face-to-face lectures and e-learning methods. Two video-based e-learning contents were developed based on the rapid prototyping model and loaded onto the learning management system (LMS), which was available at http://www.greenehrd.com. Eighty-five Korean agricultural high school students were randomly assigned into the two groups: face-to-face lecture (control group), and video-based e-learning (experimental group). The students of the experimental group logged onto the LMS in the school computer lab and completed each e-learning module. All students were required to take a pretest and posttest before and after learning under the direction of the subject teachers. One-way analysis of variance (ANOVA) was used to examine any difference between the two groups in terms of learning outcomes. One-way analysis of covariance (ANCOVA) was also administered to verify whether there was any difference between the two groups after controlling for the covariate variable: pretest score. According to the results, e-learning resulted in better learning outcomes than face-to-face lecturing. These findings suggest that the use of well designed and appropriately applied e-learning could be worthy even in agricultural education, which stresses hands-on experience and lab activities. Further research should focus on a different e-learning content type in different agricultural subject fields and its relationship with learning outcome.     

Teachers' perceptions of the recent curriculum reforms and their implementation: what can we learn from the case of Korean elementary teachers?

This study examines: 1) how Korean elementary school teachers perceive recent curriculum reforms; 2) where their perceptions emanate from; and 3) what support teachers need in order to implement curriculum reforms actively and effectively. This study has shown that teachers generally harbour negative and unconstructive feelings about curriculum reform. These feelings negatively impact their involvement in and commitment to implementing reform. Several issues to be considered for teacher training and support evolved from our analysis of teachers' perceptions of the curriculum reform and the implementation: first, teachers are insufficiently provided with professional development programmes that support curriculum implementation; second, teachers lack opportunities to work through implementation problems and difficulties with peer teachers; and last, contextual and cultural constraints inhibit implementation of curriculum reform. Based upon these findings, this study makes several suggestions for teacher educators and curriculum policymakers.     

Integration of user profiles: models and experiments in information retrieval

One difficult problem in information retrieval (IR) is the proper interpretation of user queries. It is extremely hard for users to express their information needs in a specific yet exhaustive way. In an effort to alleviate this problem, two theoretical models have been proposed to utilize user characteristics maintained in the form of a user profile. Although the idea of integrating user profiles into an IR system is intuitively appealing, and the models seem viable, no research to date has established a foundation for the roles of user profiles in such a system. Aiming at the investigation of the roles of user profiles, therefore, this study first identifies and extends various query/profile interaction models to provide a ground upon which the investigation can be undertaken. From a continuum of models characterized on the basis of interaction types, metrics, and parameters, nearly 400 models are chosen to investigate the “model space.” New measures are developed based on the notion of user satisfaction/frustration. In addition, three different criteria are used to guide users in making judgments on the quality of retrieved items. Analysis of the data obtained from the experiments shows that, for a wide variety of criteria and metrics, there are always some query/profile interaction models that outperform the query alone model. In addition, preferable characteristics for different criteria are identified in terms of interaction types, parameters, and metrics.     

National construction of global education: a critical review of the national curriculum standards for South Korean global high schools

In this paper, the authors investigate what global visions of education are reflected in the selected national curriculum standards, with special reference to two seemingly contradictory forces: globalization and nationalism. This paper examines the socio-economic and cultural foundations of the curriculum and explains how the national curriculum for South Korean global high schools symbolically appropriates global education for the purpose of national competitiveness. Our findings show that, although the selected curriculum document alludes to the importance of international understanding and of global citizenship education, its primary objective is to provide students with knowledge and skills for national competitiveness and to uphold, rather than weaken, national identity in reaction to global pressures. This phenomenon is closely linked to the historical background of Koreanized globalization, in which the concept of segyehwa has been used as a catalyst for undertaking global education for the ends of global competiveness and national pride.     

Expanding Demand Driven Acquisition: Complete Just-In-Time Approval Plan

Abstract

A DDA (Demand Driven Acquisitions) preferred Approval Plan allows libraries to acquire DDA eligible books triggered by users. Non-DDA books are acquired automatically, because there is no mechanism that allows these books to be requested by users. This study explores the procedure called Purchase by Request (PBR) that allows non-DDA books to be discoverable and requested by users. After incorporating both DDA and PBR into an Approval Plan, all books in the Approval Plan are exposed to users for just-in-time purchases, and in the process saving the library a substantial amount of money.     

Effects of answer weight boosting in strategy-driven question answering

With the advances in natural language processing (NLP) techniques and the need to deliver more fine-grained information or answers than a set of documents, various QA techniques have been developed corresponding to different question and answer types. A comprehensive QA system must be able to incorporate individual QA techniques as they are developed and integrate their functionality to maximize the system’s overall capability in handling increasingly diverse types of questions. To this end, a new QA method was developed to learn strategies for determining module invocation sequences and boosting answer weights for different types of questions. In this article, we examine the roles and effects of the answer verification and weight boosting method, which is the main core of the automatically generated strategy-driven QA framework, in comparison with a strategy-less, straightforward answer-merging approach and a strategy-driven but with manually constructed strategies.