• Journal of Information Management
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• v.36 no.4
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• pp.51-69
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• 2005

High-speed classification method becomes an important research issue in text categorization systems. A fast text categorization technique, named feature value voting, is introduced recently on the text categorization problems. But the classification accuracy of this technique is not good as its classification speed. We present a novel approach for feature selection, named document-side feature selection, and apply it to feature value voting method. In this approach, there is no feature selection process in learning phase; but realtime feature selection is executed in classification phase. Our results show that feature value voting with document-side feature selection can allow fast and accurate text classification system, which seems to be competitive in classification performance with Support Vector Machines, the state-of-the-art text categorization algorithms.

• 대한공업교육학회지
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• v.39 no.1
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• pp.66-84
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• 2014

The purpose of this study is to develop STEAM hand-on activity task for middle school manufacturing & automation unit. This study was conducted following three stages. First of all, I carried out documents research and requirements analysis. And the goals for STEAM hand-on activity were set at this stage. Second, topics for STEAM hand-on activity were selected, and the organized for designing hand-on activity related STEAM in the development step. Finally, pilot and field test were conducted in order to amend and/or complement in improvement step. The theme and/or title of the hand-on activities were 'Making the print using wood', 'Making the close up photography & telephoto lens for smart phone'. The STEAM hand-on activities were designed for ten hours for each subject respectively. Each hand-on activity consists of problem situation, objectives statement, materials and tools, an evaluating criteria, related knowledge, portfolio and so on.

• Journal of Music and Human Behavior
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• v.16 no.1
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• pp.47-72
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• 2019

This study reviewed and analyzed English-written studies using a rhythmic tapping task for motor control of children with autism spectrum disorder (ASD). Inclusion criteria for the participants were children with ASD and typically developing (TD) children. The keywords used for the outcome variables included rhythmic tapping, timed movement, and synchronization. Ten studies were included in the final analysis. The included studies were analyzed in terms of target variables, auditory stimuli, and measurements. A meta-analysis was also conducted to examine how children with ASD performed rhythmic tapping tasks compared to children with TD. In the identified studies, five variables were used: timed movement control, timing reproduction, bimanual coordination, synchronization, and interpersonal synchronization. It was found that rhythmic tapping performance was analyzed in terms of accuracy and precision of the movement and reported as significantly correlated to social skills measures. The meta-analysis results showed that there were no significant differences between the ASD and TD groups in continuing rhythmic movements when the presented auditory stimuli ended, whereas there were significant group differences in their ability to maintain their motor performance consistently and to synchronize with auditory cue or with others. These results support the rhythmic tapping task as an effective measure for not only motor control but also social skills development in children with ASD.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.234-246
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• 2021

The purpose of this study is to develop the main subjects of the job-based curriculum by deriving the job analysis results of general security job workers in the physical protection field responsible for responding to threats to nuclear materials and nuclear facilities. In the job analysis stage, FGI was conducted on 7 content experts to derive 8 duties and 55 tasks. In addition, knowledge and skills were drawn for each task. In the analysis of educational needs, surveys were conducted for workers in general security jobs to derive the top 25 educational priorities through t-test and Borich needs assess model. At the stage of selecting core tasks and organizing required/optional contents, 42 tasks, both above average or at least one of them, were derived as core tasks based on the result of evaluation of importance and difficulty ratings of 55 tasks through a questionaire. In addition, tasks applied to the top 25 rankings derived from Borich needs assess model were applied as the required contents when designing courses, and tasks which applied only one of them were selected as optional contents. At the stage of required/optional modules and educational contents, four required modules and five optional modules were derived by drifting similar tasks between the required and optional contents. Based on the above results, the study suggested academic and practical implications and future suggestions.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.2
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• pp.379-390
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• 2012

This study is to consider political implication of indicators to measure personal information security in public sector studied by Ministry of Public Adminstration and Security from 2008 to 2011. The study analyzed the priority of personal information security policy dividing into personal information security infrastructure, personal information management with life cycle, correspondence of information infringement by scholars, experts, and chargers. As the results, to progress personal information security policy is important to management of personal identification information on web site; specially institutional infrastructure as responsible organization, exclusive manpower, and security budget; personal information security infrastructure. As like the results, it would be reflected in the progress of personal information security policy and tried to provide systematic management program with improving safe information distribution and usefulness.

• Journal of Digital Convergence
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• v.20 no.3
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• pp.201-209
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• 2022

In order for the military to review the introduction of virtual reality technology into various education and training systems and fully utilize it, it is important to reflect the characteristics of the technology and education system and to accurately identify and selectively apply the characteristics of commercialization. In this study, the evaluation criteria were selected through the Analitic Hierarchy Process (AHP) method for factors to be considered when commercializing a virtual reality-based education and training system, and the priorities of the projects were determined. Based on previous studies, an initial AHP model was constructed and the relative importance of six factors, including reality, was analyzed as the level 1 evaluation criteria. Next, for Level 2, each evaluation criterion was evaluated to confirm the importance of each of the 11 tasks in the six evaluation criteria, and priorities were selected for each task. As a result of the analysis, level 1 showed that reality and ripple had higher importance than other factors. As a result of evaluating the final relative importance, the priority was shown in the order of ① flight training, ② disaster training, ③ shooting Training, and ④ driving a vehicle. Based on the relative priorities determined in Levels 1 and 2 of the model presented in this study, the importance of each project necessary for final decision-making of the research priorities for the defense virtual reality project was presented. It is expected that this study can be used as a reference material for prioritizing the commercialization of education and training systems in the defense sector.

• Journal of Information Management
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• v.36 no.4
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• pp.23-49
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• 2005

The purpose of this study is to suggest the directions for building national digital archiving strategies. This present paper begins with surveying S&T information resources especially in public sector, and analyse the priority criteria for appraising and selecting the resources for long-term preservation. Emphasis is placed on identifying the critical tasks for each type of resources including scientific data, technical reports, theses, journal, web, e-prints, etc. and some levels of organizations in the national digital archiving framework. Based on the analysis, it suggests some strategic agenda for developing national digital archiving system.

• The Journal of Information Technology
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• v.7 no.3
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• pp.47-61
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• 2004

The emergence of the Internet as a tool for the business-to-consumer aspect of e-commerce has far reaching ramifications. Most importantly, it has created opportunities for businesses to reach out to consumers in a very direct was and create electronic markets. This study treats e-commerce as a technology adoption process and evaluates the suitability of popular adoption models. This research supports the use of the technology acceptance model to predict online shopping activity, both the intention to shop online and actual purchases. Also this research finds that the task-technology fit model is a valuable addition to the technology acceptance model for online shopping tasks.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.714-715
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• 2011

본 연구에서는 합리적인 기술개발 투자를 위한 배전기술개발 우선순위 결정 알고리즘을 개발하여, 최적의 배전기술개발 구현방법을 제시한다. 또한, 이들 알고리즘과 기술개발 체계도에 근거한 배전기술개발 장단기 계획(안)을 종합적으로 제시하며, 분야별 기술개발 추진안과 세부과제별 추진안을 구체적으로 제안한다. 구체적으로는 합리적인 기술개발 장단기 계획안을 수립하기 위하여, 적당한 근거와 절차에 의하여 대상기술을 선정해야 하는데, 이러한 기술개발의 우선순위를 나타내는 적정한 평가기준치를 제시하고, 이 값을 기술개발 선행지표와 평가함수식에 의해 산출하는 우선순위 평가알고리즘을 제시한다.

• Proceedings of the KIPE Conference
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• 2013.11a
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• pp.139-140
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• 2013

본 연구는 군 항공용 레이더 프로세서 유닛용 다중 출력 스위칭 전원공급기 개발 과제의 효율 요구조건 만족을 위해 선행 연구 과제로 실시되었다. 전원공급기의 다중 출력 전원 중 출력 전력이 크고, 효율 측면에서 구현 난이도가 높은 +3.3VDC/55A 전원을 대상으로 선정하였다. 주요 개발 목표 사양은 입력전압 범위 230VDC~330VDC, 전압 안정도 ${\pm}2%$, 효율 85% 이상이다. 이를 만족하기 위해 DC/DC 컨버터의 메인 토폴로지는 하프 브릿지 컨버터이며, 효율 특성 개선을 위하여 동기정류방식을 적용하였다. 본 논문은 DC/DC 컨버터의 설계와 Prototype을 제작하고, 고찰된 실험결과를 제시한 내용으로, 230VDC~330VDC 범위의 입력 조건 및 +3.3VDC/55A 출력 조건에서 최대 89%의 효율 특성을 확인한 내용을 기술한다.