• 디지털융복합연구
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• 제12권5호
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• pp.425-433
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• 2014

프로그래밍 교육에서 로봇의 활용은 학생의 흥미와 학습의 동기를 유발시키지만, 로봇에 대한 구조적인 이해와 함께 로봇 프로그램의 내부적인 이해를 동시 요구한다. 따라서 문제가 발생하면 학생이 무엇에 의한 오류인지 파악하는데 어려움이 있다. 본 연구의 목적은 로봇 프로그래밍 교육에서 시뮬레이션 도구의 활용 가능성을 확인하는 것이다. 교육 가능성을 분석하기 위해 초등학생을 대상으로 하는 로봇 프로그래밍 교육에 시뮬레이션 도구와 비 시뮬레이션 도구를 적용하고, 사용성 평가와 인식 설문을 통해 시뮬레이션 도구의 교육가능성을 분석하였다. 적용 결과, 시뮬레이션 도구의 사용성은 기존의 비 시뮬레이션 도구와 차이가 없었다. 시뮬레이션 도구는 프로그래밍의 결과를 미리 확인할 수 있고 오류를 쉽게 파악하는데 도움을 줄 수 있다는 긍정적인 측면이 있었다. 본 연구는 초등 로봇 프로그래밍 교육에서 시뮬레이션 도구의 활용 가능성을 확인했다는데 의의를 찾을 수 있다.

• 디지털산업정보학회논문지
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• 제11권2호
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• pp.121-129
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• 2015

Interactive media is a method of communication in which the output from the media comes from the input of the users. The interactive media lets the user go back with the media. Interactive media works with the user's participation. The media still has the same purpose but the user's input adds the interaction and brings interesting features to the system for a better enjoyment. We need a digital content using a dynamic motion and gesture of the mobile device. We made an authoring tool for content producers to easily create interactive content. We have tried to take advantage of the interaction by using a touch screen and a gravity sensor of the mobile device. This interaction may lead to allow the user to participate in the content, it can be used as a key device to assist in engagement. Furthermore, our authoring tool can be applied to various fields of publishing content.

• Environmental Engineering Research
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• 제15권3호
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• pp.167-172
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• 2010

The effects of low impact development (LID) techniques, such as green roofs and porous pavements, on the runoff and pollutant load from an apartment complex were simulated using the Site Evaluation Tool (SET). The study site was the Olympic Village, a preexisting apartment complex in Seoul, South Korea, which has a high percentage of impervious surfaces (approximately 72% of the total area). Using the SET, the effects of replacing parking lots, sidewalks and driveways (37.5% of the total area) having porous pavements and rooftops (14.5% of the total area) with green roofs were simulated. The simulation results indicated that LID techniques reduced the surface runoff, and peak flow and pollutant load, and increased the evapotranspiration and soil infiltration of precipitation. Per unit area, the green roofs were better than the porous pavements at reducing the surface runoff and pollutant loads, while the porous pavements were better than green roofs at enhancing the infiltration to soil. This study showed that LID methods can be useful for urban stormwater management and that the SET is a useful tool for evaluating the effects of LID on urban hydrology and pollutant loads from various land covers.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.869-874
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• 2004

The inverse kinematics of five-axis milling machines produce large errors near stationary points of the required surface. When the tool travels cross or around the point the rotation angles may jump considerably leading to unexpected deviations from the prescribed trajectories. We propose three new algorithms to repair the trajectories by adjusting the rotation angles in such a way that the kinematics error is minimized. Given the tool orientations and the inverse kinematics of the machine, we first eliminate the jumping angles exceeding ${\pi}$ by using the angle adjustment algorithm, leaving the jumps less than ${\pi}$ to be further optimized. Next, we propose to apply an angle switching algorithm to compute the rotations and identify an optimized sequence of rotations by the shortest path scheme. Further error reduction is accomplished by the angle insertion algorithm based an o special interpolation to obtain the required rotations near the singularity. We have verified the algorithms by five-axis milling machines, namely, MAHO600E at the CIM Lab of Asian Institute of Technology and HERMLE UWF902H at the CIM Lab of Kasetsart University.

• 산업공학
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• 제22권1호
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• pp.17-25
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• 2009

In mobile device's user interface, menu organization is very important as well as menu structure because small display of mobile device. Menu items should be organized based on user knowledge structure to design user-centered interface. Traditionally, MDS (Multidimensional Scaling) have been most often used to expose users' perceived organization of menu items. But, information that MDS reveals is just relative spatial location of concepts and not relevant to concepts connection. Unlike MDS, Trajectory Mapping explicitly finds users' cognitive links between perceived concepts. This study proposes a Trajectory Mapping technique for eliciting knowledge structure, especially a set of cognitive pathways linking menu items, from end user. With twelve participants, MDS and Trajectory Mapping were conducted using cellular phone's menu items. And user knowledge structure was analyzed through Visual Concept Map that combination of results of MDS and Trajectory Mapping. After then, menu items were organized according to users' perceived organization. Empirical usability test was also conducted. The results of usability test showed that usability, in terms of task performance time, number of errors, and satisfaction, for newly organized interface was significantly improved compare to original interface. The methodology of this study is expected to be applicable to design a user-centered interface. In other words, Trajectory Mapping technique can be used as a design tool of user interface for imposing user knowledge structure on the interface.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1997년도 춘계학술발표회논문집(1)
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• pp.133-138
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• 1997

For a long time, a number of alarm processing techniques have been researched to reduce the number of actuated alarms for operators to deal with effectively during the abnormal as well as the normal conditions. However, the strategy that the only systems with a few clear technologies should be used as a part of an alarm annunciation system has been adopted considering the effectiveness and the reliability in actual alarm processing systems. Therefore, alarm processing systems have difficult knowledge-base maintenance problems and limited expansion or enhancement defects. To solve these shortcomings, the integrated knowledge-base which can express the general information related to all the alarm processing techniques is proposed and its management tool, Knowledge Input Tool for Alarm (KIT-A) which can handle the data of the knowledge-base efficiently is developed. Since the integrated knowledge-base with KIT-A can manipulate all the alarm information without the modification of alarm processing system itself, it is expected to considerably advance the overall capability of maintenance and enhancement of the alarm processing systems.

• 품질경영학회지
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• 제37권3호
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• pp.39-53
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• 2009

This paper suggests a new process structuring method, which we call process modularization, for decomposing and grouping activities in a process. Above all, we propose the concept of a module that is a group of activities positioned on the same flow before and after control constructs. Since activities in a module are relatively strongly interrelated with one another, it is important to take into consideration of these together. A design structure matrix (DSM) is used to structure the process because it has a lot of advantages in process modeling and analysis. We developed two algorithms: the restricted topological sorting (RTS) algorithm for ordering activities and the module finding (MF) algorithm for detecting modules in a process, which utilize the DSM. The suggested approach enables a firm's manager to design and analyze the process effectively. We also developed a supporting tool to accelerate the progress of process modularization. The supporting tool aids the process manager in finding the module and understanding the process structure easily. An illustrative example is addressed to show operations of the suggested approach.

• 한국기록관리학회지
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• 제12권1호
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• pp.7-32
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• 2012

전자기록물의 이관할 때, 전자기록물의 필수 메타데이터의 검증과 실제 문서에 있는 메타데이터를 이용한 검증도 중요하다. 본 연구에서는 전자기록물에 포함된 다양한 형식의 전자파일 중에서 본문파일에서 메타데이터를 추출하고 항목별로 분류한 후 이관되는 메타데이터 항목과 비교 검증을 위한 기술 개발을 연구하였다. 해외에서 개발된 추출 도구와 달리 국내 전자결재 형식을 감안하여 첨부된 본문파일에서 메타데이터를 추출하는 기술을 개발하였으며, 기록물 문서 메타항목에 저장된 원 메타데이터와 추출 메타데이터간 비교 검증을 수행하는 도구를 개발하였다.

• 한국농촌간호학회지
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• 제15권1호
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• pp.1-8
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• 2020

Purpose: This purpose of this study was to develop a disaster and safety practice measurement tool for elderly people in rural areas. Methods: The tool for this study was developed and validated according to DeVellis' scale development process. The construct validity of the instrument was analyzed by major analysis of Varimax rotation, and the internal inertia was verified by Cronbach's ⍺. Results: The final scale was a 4-point scale, consisting of 23 items in 7 domains. The total explanation was 54.1% and the Cronbach's ⍺ was .80. Conclusion: The results of this study should be useful to assess elders' perception of the importance of safety management for elders.

• 한국건축시공학회지
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• 제11권2호
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• pp.200-207
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• 2011

Construction management services have been adopted for more than a decade and are continuously growing; however, the advantages of utilizing a construction management service are still not quite clear, regardless of many arguments can be made in their favor. The construction manager, as a coordinator, is supposed to smoothly facilitate the project teamwork in order to deliver a profitable and satisfactory project, not only for the owner's interests but also for the success of all project participants. This study has focused on the teamwork supports a construction manager can provide during project operations. This study developed a benchmarking tool to assess the construction manager's role in terms of its project teamwork supports, by utilizing the evaluation model and several case studies. In addition, this study also attempted to set the industry average and higher performance so that both the owner and the construction manager can self-assess, and more importantly, can improve project operation. The actual implementation of the benchmarking tool into on-going projects can allow the construction manager to understand the current operation and to make a better project process through teamwork.