• 정보교육학회논문지
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• 제18권1호
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• pp.101-110
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• 2014

지식정보화시대를 넘어 다가올 '창조사회'에서는 '지식 소비자'가 아닌 자신의 생각을 창의적으로 표현할 수 있는 '지식 생산자'를 필요로 한다. 최근에 컴퓨팅 환경도 컴퓨터를 단순히 조작하는 것을 넘어 학습자의 생산적 활동을 지원하는 초소형 PC들이 출현하고 있다. 그중 대표적인 라즈베리 파이는 $35의 경제적인 PC이면서 아날로그 세계를 감지하고 반응할 수 있는 하드웨어와 프로그래밍 제어를 통한 인터렉티브한 물리적 시스템 구현을 지원하고 있다. 본 연구는 초등학교에서 라즈베리 파이의 교육적 활용에 관한 기초 연구로서 라즈베리 파이의 특징, 장단점, 활용 사례를 살펴보았다. 또한 현장교사를 대상으로 '정보기기의 이해' 영역의 도구적 적합성 검토 및 라즈베리 파이에 대한 인식조사를 병행하였다. 검토결과 교육내용의 약 74%를 지원하는 학습도구로 분석되었으며 인식조사에서는 거의 모든 항목에서 교사들이 긍정적 반응을 나타내었다.

• Imaging Science in Dentistry
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• 제47권2호
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• pp.75-86
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• 2017

Purpose: The purpose of this study was to apply a newly developed free software program, at low cost and with minimal time, to evaluate the quality of dental and maxillofacial cone-beam computed tomography (CBCT) images. Materials and Methods: A polymethyl methacrylate (PMMA) phantom, CQP-IFBA, was scanned in 3 CBCT units with 7 protocols. A macro program was developed, using the free software ImageJ, to automatically evaluate the image quality parameters. The image quality evaluation was based on 8 parameters: uniformity, the signal-to-noise ratio (SNR), noise, the contrast-to-noise ratio (CNR), spatial resolution, the artifact index, geometric accuracy, and low-contrast resolution. Results: The image uniformity and noise depended on the protocol that was applied. Regarding the CNR, high-density structures were more sensitive to the effect of scanning parameters. There were no significant differences between SNR and CNR in centered and peripheral objects. The geometric accuracy assessment showed that all the distance measurements were lower than the real values. Low-contrast resolution was influenced by the scanning parameters, and the 1-mm rod present in the phantom was not depicted in any of the 3 CBCT units. Smaller voxel sizes presented higher spatial resolution. There were no significant differences among the protocols regarding artifact presence. Conclusion: This software package provided a fast, low-cost, and feasible method for the evaluation of image quality parameters in CBCT.

• 환경영향평가
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• 제17권4호
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• pp.235-242
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• 2008

To develop a watershed management plan for protection of the lake water quality, the linkages among land use activities, stream water quality, and lake water quality must be understood. This study conducted to develop a Decision Support System(DSS) for the reservoir water quality managers and a comprehensive watershed management plan. This DSS has three main components; database, interactive decision model, and data delivery interface system. Graphic User Interface(GUI) was developed as the interface medium to deliver the data and modeling results to the end users. Water quality management scenarios in Yongdam reservoir consist of two parts. One is the watershed management, and the other is water quality management in the reservoir. The watershed management scenarios that were evaluated include as follows : a removal of point sources, control of waste water treatment plant, reductions in nonpoint sources, and the management of developed land. Water quality management scenarios in the reservoir include to install a curtain wall and to operate an algae removal system. The results from the scenario analysis indicate that the strategy of the reservoir water quality management can promise the best effectiveness to conserve the quality of reservoir water. It is expected that many local agencies can use this DSS to analyze the impact of landuse changes and activities on the reservoir watershed and can benefit from making watershed management decisions.

• 대한물리의학회지
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• 제11권2호
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• pp.93-102
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• 2016

PURPOSE: The purpose of this study is to evaluate the functional effects of action observation plus functional electrical stimulation (FES) treatment on the weight distribution indexes (heel and toe; right and left), stability indexes, gait velocities, and stride lengths of stroke patients. METHODS: The subjects, who were all more than six months post stroke, were randomly divided into two groups of ten each: an experimental group and a control group. TETRAX (Tetrax Interactive Balance System) and GAITRite (GAITRite$^{TM}$ computerized gait analysis system) were measured at baseline, six weeks after treatment. Participants in both the groups received functional electrical stimulation treatment, but the experimental group was provided with additional action observation. Independent t-tests were used to compare the differences between the groups, and repeated measured two-way ANOVA was used to compare the interaction between the groups. RESULTS: The result of the interactions between the groups and the periods showed significant increases in the weight distribution indexes (heel and toe; right and left), stability indexes, gait velocities and stride lengths (p<0.05). However, a comparison between the groups showed no significance in the weight distribution indexes (heel and toe), stability indexes, and stride lengths (p>0.05). CONCLUSION: Action observation plus functional electrical stimulation treatment should be considered as a therapeutic method for physical therapy for stroke patients to improve the weight distribution indexes, stability indexes, gait velocities, and stride lengths.

• 한국융합학회논문지
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• 제8권8호
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• pp.59-69
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• 2017

인문 사회과학 연구원들과 데이터베이스 전문가들이 태평양문제연구회(IPR)가 작성한 IPR 자료를 데이터베이스로 구축하기 위해 함께 하였다. 본 논문은 그 데이터베이스의 구축에서 IPR 자료의 품질을 보장하기 위한 쟁점과 해결책을 제시한다. 우리는 데이터베이스의 접근성을 위해 웹에 데이터베이스를 유지하여 연구원들이 웹 브라우저로 접근할 수 있도록 하며, 데이터베이스 구축의 편리성을 위해 통합 인터페이스를 제공하여 연구원들이 그 속에서 모든 작업을 수행하게 하며, 구축한 IPR 자료의 완전성을 위해 입력된 각 IPR 자료의 책임 소재를 밝히는 책임 입력과 책임 승인을 지원하며, 승인의 즉시성을 위해 연구원들의 입력을 원활히 하는 대화형 승인 과정을 지원한다. 또한 구축한 IPR 자료의 정확성을 보장하기 위해 우리는 데이터베이스 설계, 질의 처리, 트랜잭션 관리, 검색과 정렬 기법들을 사용한다. 특히, 레코드들 간의 존재 종속관계를 이용한 동시성 제어를 통하여 운영체제 파일과 그 파일의 경로 간의 정확성을 보장한다. 향후 연구로 내용 검색, 데이터베이스의 다운로드와 업로드, IPR 자료의 저작권 관련 작업을 포함한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 춘계종합학술대회
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• pp.155-160
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• 2003

본 논문에서는 동공 검출을 이용한 얼굴 검출 방법을 제안하고자 한다. 동공검출기는 눈의 역반사 특성을 이용한 능동적 조명을 사용하여 검출을 용이하도록 하였고. 제안된 방법의 검출 범위는 소형컴퓨터나 무인정보 단말기 등의 활용에 적합하도록 하였다. 동공 후보 영역을 계산하여 검출한 후, 학습 규칙을 사용하여 얼굴에 대응하는 두 개의 지점을 선택하도록 하였다. 얼굴 검출 성능을 증명하기 위하여, 얼굴의 최대 돌출 부위를 지정 할 수 있는 이중 모드의 얼굴 추적 장치를 개발하였다. 추정치와 복합 얼굴 검출기의 측정치를 결합하여 특징 관계를 추적함으로 처리의 안정성을 높였으며 또한, 실시간으로 서보의 제어 장치를 원격 조정하여 항상 카메라가 이미지의 중앙을 추적하도록 함으로서 얼굴의 위치를 추정할 수 있도록 하였다.

• 정보처리학회논문지A
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• 제10A권6호
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• pp.595-604
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• 2003

아날로그 TV에 비해 새로운 방식의 디지털 TV는 단순한 영상과 음성의 처리뿐만 아니라, 데이터를 처리 및 저장해야 한다. 그리고 필요에 따라 데이터를 요구하기 위한 리턴 채널을 관리해야 한다. 이처럼 많은 기능을 동시에 충족시켜줘야 하기 때문에 디지털 TV시스템에서는 운영체제가 필요하다. 임베디드 리눅스는 오픈 소스로서 가격 경쟁력을 확보할 수 있으며, 공개된 장치 드라이버와 응용프로그램을 재사용 가능하며, 오픈 소스 공동체를 통해 문제를 쉽게 해결할 수 있고, 쉘, 파일 시스템을 이용하여 편리한 개발 환경을 제공해 주는 이점이 있다. 본 논문에서는 디지털 TV 시스템을 위한 임베디드 리눅스를 이식하기 위해 교차 개발 환경과 커널을 빅 엔디언으로 변경하였고, 커널 구동에 필수적인 장치들을 재설계하였으며, 커널을 메모리에 적재할 수 있도록 시스템 메모리 맵을 재설정하였다. 또한 시스템 장치제어를 위한 디바이스 드라이버를 작성하였다.

• 대한지역사회영양학회지
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• 제18권4호
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• pp.299-311
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• 2013

An educational application (App) called 'Children's Food Avatar' was developed in this study by using a food DB of nutrition and functionality from Rural Development Administration (RDA) as a smart-learning mobile device for elementary school students. This App was designed for the development of children's desirable dietary habits through an on-line activity of food choices for a meal from food DB of RDA provided as Green Water Mill guide. A customized avatar system was introduced as an element of fun and interactive animation for children which provides nutritional evaluation of selected foods by changing its appearance, facial look, and speech balloon, and consequently providing chances of correcting their food choices for balanced diet. In addition, nutrition information menu was included in the App to help children understand various nutrients, their function and healthy dietary life. When the App was applied to 54 elementary school students for a week in November, 2012, significant increases in the levels of knowledge, attitude and behavior in their diet were observed compared with those of the control group (p < 0.05, 0.01). Both elementary students and teachers showed high levels of satisfaction ranging from 4.30 to 4.89 for the App, therefore, it could be widely used for the dietary education for elementary school students as a smart-learning device.

• 한국작물학회지
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• 제52권2호
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• pp.153-161
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• 2007

Field experiments were conducted to determine the physiological and biochemical basis of the interactive effect of sulphur (S) and nitrogen (N) application on seed and xanthotoxin yield of Ammi majus L. Six treatments were tested ($T_1$ = control-without manure and fertilizers, $T_2$ = manure @ 9 kg $plot^{-1}-10\;t\;ha^{-1},\;T_3=A_0N_{50}K_{25}P_{25},\;T_4=S_{40}N_{50}K_{25}P_{25},\;T_5=S_{40}N_{100}K_{25}P_{25}\;T_6=S_{20+20}N_{50+50}K_{25}P_{25})$). Nitrate reductase (NR) activity and ATP-sulphurylase activity in the leaves were measured at various phonological stages, as the two enzymes catalyze rate-limiting steps of the assimilatory pathways of nitrate and sulphate, respectively. The activities of these two enzymes were strongly correlated with seed and xanthotoxin yield. The highest nitrate reductase activity, ATP-sulphurylase activity and xanthotoxin yield were achieved with the treatment $T_4$. Any variation from this treatment decreased the activity of these enzymes, resulting in a reduction of the seed and xanthotoxin yield in Ammi majus L. The higher seed and xanthotoxin yield achieved in Ammi majus L. at treatment $T_4$ could be due to optimization of leaf soluble protein and photosynthetic rate, as these parameters are Influenced by S and N assimilation.

• 대한의용생체공학회:의공학회지
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• 제28권3호
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• pp.410-416
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• 2007

This paper presents quantitative analysis of a training system based on an unstable platform and a visual interactive system for improving sense of equilibrium. The training system consists of an unstable platform, a force plate, a safety harness, a monitoring device, and a personal-computer. To confirm the effects of the training system, fifteen young volunteers and five elderly volunteers went through a series of balance training using the system. During the training, we measured relevant parameters such as the time a subject maintain his or her center of pressure on a target, the time a subject moves his or her center of pressure to the target, and the mean absolute deviation of the trace before and after training with this system and training programs to evaluate the effects of the training. The results showed that the training system can successfully assess the gradual improvement of the postural control capability of the subject in the system and showed a possibility of improving balance of the subject. Moreover, the significant improvement in the postural capability of the elderly subject suggests that elderly subjects can benefit more from the training using the system for the improvement of sense of equilibrium.