• 대한간호학회지
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• 제49권4호
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• pp.398-410
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• 2019

Purpose: This study used a system dynamics methodology to identify correlation and nonlinear feedback structures among factors affecting adolescent cyberbullying victims (CV) in Korea and to construct and verify a simulation model. Methods: Factors affecting CV were identified by reviewing a theoretical background in existing literature and referencing various statistical data. Related variables were identified through content validity verification by an expert group, after which a causal loop diagram (CLD) was constructed based on the variables. A stock-flow diagram (SFD) using Vensim Professional 7.3 was used to establish a CV model. Results: Based on the literature review and expert verification, 22 variables associated with CV were identified and the CLD was prepared. Next, a model was developed by converting the CLD to an SFD. The simulation results showed that the variables such as negative emotions, stress levels, high levels of conflict in schools, parental monitoring, and time spent using new media had the strongest effects on CV. The model's validity was verified using equation check, sensitivity analysis for timestep and simulation with 4 CV adolescent. Conclusion: The system dynamics model constructed in this study can be used to develop intervention strategies in schools that are focused on counseling that can prevent cyberbullying and assist in the victims' recovery by formulating a feedback structure and capturing the dynamic changes observed in CV. To prevent cyberbullying, it is necessary to develop more effective strategies such as prevention education, counseling and treatment that considers factors pertaining to the individual, family, school, and media.

• 디지털콘텐츠학회 논문지
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• 제19권7호
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• pp.1225-1235
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• 2018

본 연구에서는 신체활동 모니터링이 가능한 스마트 의류와 연동되는 스마트 피트니스 콘텐츠와 관련하여 실용성을 갖춘 소비자 맞춤형 스마트 콘텐츠 개발 기획 연구의 일환으로, 타겟소비자의 잠재적 수요를 반영한 셀프트레이닝 지원용 스마트 피트니스 콘텐츠 개발의 구체적인 구현방향을 탐색하였다. 그 결과, 스마트 피트니스 콘텐츠에 대한 잠재적 수요는 시간 경과의 순서에 따라 '운동시작 전'의 단계에서는 '사용 접근성', '흥미유도', '다각적 스토리라인'의 범주어가 도출되었고, '운동수행 중'의 단계에서는 '실시간 음성코칭', '정확한 운동자세 모니터링', '개인 맞춤형 운동처방'이 도출되었다.'운동 직후'의 단계에서는 '실질적 보상제도', '등급제도', '체형변화 모니터링', '일상생활 모니터링'이 도출되었고, '다음 운동으로 연결'의 단계에서는 '동기유발', '높은 지속성' 이 도출되었다.

• 농촌계획
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• 제13권2호
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• pp.17-26
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• 2007

This study aims to develop a rational evaluation system which consists of the selection of evaluation items and the estimation of its weight for the Enhancement Program of the Quality of Life for Farmers and Fishermen and Rural Development. This system has two hierarchical steps. The first step shows the evaluation goals which are relevance, efficiency and effectiveness of the program. The second step stands for the evaluation items which have 11 sub-items such as necessity and externalization for the program, rationality of procedures, feedback and monitoring system, budgetary allocations, information activities, impacts on the program, achievements of the goals and so on. A tentative evaluation system was proposed by brainstorming and Delphi method of expert-group. Weighting values of evaluation items were calculated through pair-comparison works of expert group using stepwise matrix sheets by AHP(Analytic Hierarchy Process).

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.28-30
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• 2022

최근 COVID-19의 변종으로 다시금 확진자의 수가 증가하고 있다. 특히 빠르게 증가하는 확산을 막기 위해 격리를 권고하는데, 타인과의 접촉을 최소한으로 하는 등의 환경을 제어하여 안전성을 높일 수 있기 때문이다. 그뿐만 아니라 특정 조건에 따라 면회가 금지되는 등 보호자의 입장에서 환자의 상태를 확인할 수 없을 때가 종종 있다. 이때 병원에서 사용되는 의료용 가스인 산소, 이산화탄소의 농도와 온습도, 알코올의 센서 데이터값을 지그비 무선통신 기술을 활용하여 원격으로 데이터 수집 후 전처리 과정을 거쳐 데이터베이스에 저장하고 모니터링할 수 있는 시스템을 설계하고자 한다. 관리되고 있는 환경에 대한 데이터를 병원 측에서 확인 후 피드백이 가능하게 설계하고 더 나아가 보호자들에게도 신뢰성을 줄 수 있는 시각화 시스템인 환경 모니터링 시스템을 제안한다.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2000년도 제21회 KOSCO SYMPOSIUM 논문집
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• pp.168-174
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• 2000

A diode laser sensor system based on absorption spectroscopy techniques has been developed to measure $CO_2$ concentration and temperature non-intrusively in high temperature combustion environments using a 2.0 ${\mu}m$ DFB(Distributed Feedback) laser. Two optics was fabricated in pig-tail fashion and all optical components were implemented in a single box. The evolution of measurement sensitivity was done using test cell by changing sweep frequency and $CO_2$ concentration. Gas temperature was determined from the ratio of integrated line strengths. Species concentration was determined from the integrated line intensity and the measured temperature. The result show that the system has 2% error in wide operation frequency range and accuracy of $CO_2$ concentration was about 3%. The system was applied to measure temperature and concentration in the combustion region of a premixed $CH_4$ +air triangular flame. The measurement results of gas temperature agreed well with thermocouple results. Many considerations were taken into account to reduce optical noise, etalon effect, beam steering and base line matching problem. The evaluations results and actual combustion measurement demonstrate the practical and applicability for in-situ and real time combustion monitoring in a practical system.

• 보건교육건강증진학회지
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• 제20권4호
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• pp.111-127
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• 2003

The government of Korea enacted the National Health Promotion Act in 1995, and set aside funds for national health promotion, endeavoring to reduce the smoking rate of its citizens. Consequently, smoking rates in all age groups of both sexes were lowered during the period of 1999-2003 when legal backing and financial support for no-smoking policies from the national health promotion funds were provided. The decrease in the smoking rate is attributed to the combined effort of the fact that enactment of related acts, their implementation, financial support, and education and publicity 'campaigns on no smoking. However, at the current pace of decreasing the smoking rates, it will be difficult to achieve the Health and Welfare Ministry's smoking rate goal of30％ among adult males by 2013. Thus, related acts should be reshaped, corresponding support should be increased, and financial support should also be provided to implement comprehensive no-smoking policies. Also, budgets should also be alloted to establish a system of providing feedback on the monitoring and evaluation of both short-term and long-term no-smoking business planning and implementation.

• Nuclear Engineering and Technology
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• 제53권11호
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• pp.3685-3693
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• 2021

This paper presents a disturbance observer-based robust backstepping load-following control (DO-RBLFC) scheme for modular high-temperature gas-cooled reactors (MHTGRs) in the presence of actuator saturation and disturbances. Based on reactor kinetics and temperature reactivity feedback, the mathematical model of the MHTGR is first established. After that, a DO is constructed to estimate the unknown compound disturbances including model uncertainties, external disturbances, and unmeasured states. Besides, the actuator saturation is compensated by employing an auxiliary function in this paper. With the help of the DO, a robust load-following controller is developed via the backstepping technique to improve the load-following performance of the MHTGR subject to disturbances. At last, simulation and comparison results verify that the proposed DO-RBLFC scheme offers higher load-following accuracy, better disturbances rejection capability, and lower control rod speed than a PID controller, a conventional backstepping controller, and a disturbance observer-based adaptive sliding mode controller.

• Educational Technology International
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• 제24권1호
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• pp.53-80
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• 2023

This study investigates faculty support for quality assurance in online education, and offers suggestions for its improvement based on feedback from Instructional Design (ID) staff working at a public university in the U.S. Qualitative research using semi-structured interviews was conducted with seven ID staff in order to examine their perceptions regarding faculty support related to quality assurance in online education. The results of the data analysis indicate that four types of faculty support-quality assurance reviews using Quality Matter (QM) standards, templates, individual consultations with ongoing support, and monitoring-were offered for faculty. Faculty support for quality assurance in online education could be improved by developing specific quality assurance standards, recruiting external experts, examining learning effects, developing a quality assurance management system, and sharing documents among ID staff. This study highlights the necessity of quality assurance in online education and provides cases of faculty support in a real higher education setting.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.629-630
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• 2017

최근 현대인들이 많은 업무와 학업으로 인하여 좌식 생활의 빈도가 매우 높아지고 있으며, 장시간 동안 의자에 앉아 있으면서 올바르지 않은 자세와 습관으로 인해 습관성 척추 질환환자가 증가하고 있다. 따라서 이러한 질환을 실시간 모니터링을 통해 사전에 방지하고 사용자가 올바른 자세의 중요성을 인지할 수 있도록 가이드 제시가 요구된다. 본 연구에서는 압력센서 기반의 체중분포 시스템을 사용하여 사용자의 앉은 자세를 판단하고 피드백 함으로써 자세를 교정하는 데 도움을 줄 수 있는 자세 판별 시스템을 구현하였다. 체중의 분포 패턴을 분석하여 1가지의 정상 자세와 6가지의 비정상 자세를 판단하였으며, 비정상 자세를 지속적으로 유지하고 있다면 알림이 울려 바른 자세로 유도하는 어플리케이션의 구현에 대해 기술하였다.

• 대한화학회지
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• 제57권4호
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• pp.499-506
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• 2013

이 연구에서는 경북 지역의 사범대학에 개설된 화학교육론 강좌에 클리커로 알려진 교실 응답 시스템을 적용한 뒤 이에 대한 예비 화학교사들의 인식을 조사하였다. 강의 첫 시간에 클리커의 교육적 활용 방법과 사용법에 대해 소개한 뒤, 수업 중 평균 4-5개의 질문을 제시하였다. 이 질문에 대한 답을 예비교사들에게 클리커로 입력하게 한 뒤, 응답 분포를 확인하고 이에 대한 피드백을 제공하였다. 예비교사들에게 제시된 질문은 학습 내용을 회상하는 질문, 관련 내용에 대한 이해정도를 점검하는 질문, 어떤 사안에 대한 견해를 확인하는 질문, 이해가 어려운 내용에 대한 질문이 다양하게 포함되었다. 학기 말에 클리커 활용에 대한 예비교사들의 인식을 리커트 형식과 에세이 형식으로 조사한 결과, 예비 화학교사들은 클리커 활용의 인지적 효과, 정의적 효과, 그리고 매체 특성 측면 모두에서 긍정적으로 인식하였다. 8가지 클리커 질문 유형 중 예비교사들이 선호하는 유형은 개념 이해 질문과 학습 점검 질문이었다. 클리커를 활용한 구체적인 사례와 연구 결과에 대한 교육학적 함의도 포함되었다.