• 정보처리학회논문지D
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• 제15D권2호
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• pp.271-284
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• 2008

자가치유란 시스템에 정의된 제약사항들을 평가하고 위배 시에 적절한 전략을 적용하는 방법론이다. 오늘날 복잡해져가는 컴퓨팅 환경에서 자가치유를 위해 시스템에 발생한 문제를 스스로 인식하는 능력을 부여하는 연구가 중요한 이슈가 되고 있다. 그러나 대부분의 기존연구들은 목표시스템을 자가치유하기 위해 자가치유 개발자들이 제약조건을 모델링하고 분석해야 하는 노력이 크다. 따라서 본 논문에서는 자가 치유 기법을 기반으로 시스템의 내외부 문제 결정을 자동화하는 방법론을 제안한다. 본 방법론은 1) 목표 시스템의 설계단계에서 생성된 설계모델들로 시스템을 명세화하고, 2) 명세화 된 내용을 기반으로 시스템의 내외부 대한 공통 제약 사항을 자동 생성한다. 3) 자동 생성된 내부 상태 규칙을 통해 컴포넌트간의 의존관계를 해석하여 4) 생성된 공통 제약사항과 분석된 연관성 모델을 코드로 변환하고 문제결정 수준을 결정한다. 5) 문제결정 수준을 기반으로 시스템의 내외부 상태를 모니터링을 하고, 비정상 상태 발생 시 전략을 적용한다. 이러한 자동화된 제안 방법론의 특징을 통해 자가 치유 개발자의 분석의 부하를 줄이며, 나아가서는 시스템의 외적 환경뿐 아니라 내부 상태 문제에 관한 비정상적인 동작을 신속하게 정상적인 상태로 회복하고, 시스템 다운과 같은 고장 횟수를 줄이는 것이 가능해 진다. 본 논문에서는 평가를 위해 제안 방법론을 비디오 회의 시스템에 적용하고 기존 방법론과의 자가치유를 위한 활동을 비교하여 그 유효성을 확인한다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제9권8호
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• pp.199-208
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• 2019

도피이론은 자살과 같은 문제행동에 대한 이론으로 부정적인 자신인식을 그 원인으로 보고 있다. 본 연구는 최근 대표적인 청소년 문제로 주목을 받고 있는 게임과몰입의 원인을 도피이론을 통해 추적해 보았다. 자살이론은 부정적 외부환경에 의해 촉발된 문제를 내부귀인과 자기비난으로 흘러가게 하며 이를 혐오적 자기인식으로, 다시 문제행동으로 이어지는 과정을 나타낸다. 이 과정을 청소년의 환경, 심리, 행동에 대입하여 분석을 실시하였다. 그 결과로 부모의 애정부족과 일관성부재가 부정적 외부환경을 조성하고 이것이 부정적 외부환경을 조성하여 자녀의 자존감에 영향을 미치는 것으로 나타났으며, 곧이어 낮은 자존감이 우울이라는 부정적 감정을 유발, 자신의 통제력을 낮추어 게임과몰입을 유도하는 것으로 확인되었다. 이와 같은 분석 결과는 게임과몰입이 도피이론모형을 통해 설명되던 폭식, 쇼핑중독 등 강박행동과 유사한 구조를 가지는 것을 나타냈으며, 게임과몰입 연구를 위해서 개인의 환경심리요인에 보다 집중할 필요가 있음을 나타낸다.

• Current Photovoltaic Research
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• 제11권4호
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• pp.134-143
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• 2023

Efforts are being made to respond to global warming. Interest in and demand for the private sector-led RE100 campaign is also increasing. Self-built solar power generation, one of the implementation tools for RE100, is not expanding. However, it can be an economical means of implementation in the long run. In this study, we intend to analyze the impact on the optimal ratio of self-solar power generation using HOMER simulation. OPR defines the optimal solar power generation ratio and looks into what changes there are in the optimal solar power ratio when self-power consumption increases and external power purchase price changes. As a result, the optimal rate of self-solar power generation has a low impact even if self-power consumption increases. As the external power unit price increases, the optimal ratio increases, and at a power unit price of 100 KRW/kWh, OPR is 24%; at 200 KRW/kWh OPR is 31%; and at 300 KRW/kWh OPR is 34%. This shows that the electricity price replaced during the life cycle has a high impact on the economic feasibility of solar power generation. However, when the external power unit price reached a certain level, the increase in OPR decreased. This shows that it is difficult for domestic companies to achieve RE100 based on the economic feasibility of solar energy alone. Therefore, efforts are needed to supply renewable energy in the public sector.

• 센서학회지
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• 제33권4호
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• pp.230-236
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• 2024

This study aimed to analyze the environmental factors affecting tomato growth by examining the correlation between weather and growth environment sensor data from P Smart Farm located in Gwangseok-myeon, Nonsan-si, Chungcheongnam-do. Key environmental variables such as the temperature, humidity, sunlight hours, solar radiation, and daily light integral (DLI) significantly affect tomato growth. The optimal temperature and DLI conditions play crucial roles in enhancing tomato growth and the photosynthetic efficiency. In this study, we developed a model to correct and predict the time-series variations in internal environmental sensor data using external weather sensor data. A linear regression analysis model was employed to estimate the external temperature variations and internal DLI values of P Smart Farm. Then, regression equations were derived based on these data. The analysis verified that the estimated variations in external temperature and internal DLI are explained effectively by the regression models. In this research, we analyzed and monitored smart-farm growth environment data based on weather sensor data. Thereby, we obtained an optimized model for the temperature and light conditions crucial for tomato growth. Additionally, the study emphasizes the importance of sensor-based data analysis in dynamically adjusting the tomato growth environment according to the variations in weather and growth conditions. The observations of this study indicate that analytical solutions using public weather data can provide data-driven operational experiences and productivity improvements for small- and medium-sized facility farms that cannot afford expensive sensors.

• Safety and Health at Work
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• 제9권1호
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• pp.115-124
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• 2018

Background: Substantial empirical research has shown conflicting results regarding the influence of organizational external factors on construction risk management, suggesting the necessity to introduce a moderator into the study. The present research confirmed whether rules and regulations matter on the relationships between organizational external factors and construction risk management. Methods: Based on discouragement and organizational control theory, this research examined the effects of organizational external factors and rules and regulations on construction risk management among 238 employees operating in construction companies in Abuja and Lagos, Nigeria. A personally administered questionnaire was used to acquire the data. The data were analyzed using partial least squares structural equation modeling. Results: A significant positive relationship between organizational external factors and construction risk management was asserted. This study also found a significant positive relationship between rules and regulations and construction risk management. As anticipated, rules and regulations were found to moderate the relationship between organizational external factors and construction risk management, with a significant positive result. Similarly, a significant interaction effect was also found between rules and regulations and organizational external factors. Implications of the research from a Nigerian point of view have also been discussed. Conclusion: Political, economy, and technology factors helped the construction companies to reduce the chance of risk occurrence during the construction activities. Rules and regulations also helped to lessen the rate of accidents involving construction workers as well as the duration of the projects. Similarly, the influence of the organizational external factors with rules and regulations on construction risk management has proven that most of the construction companies that implement the aforementioned factors have the chance to deliver their projects within the stipulated time, cost, and qualities, which can be used as a yardstick to measure a good project.

• 무역상무연구
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• 제26권
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• pp.143-172
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• 2005

The biggest exchange of international environment of shipping logistics in 21 century should appear ultra-mega container ships on the shipping market. The competitive trend of large size container ship was based on economics of scale among the international shipping business. In the environment, shipping firms consider the integration of freight forwarder and shipper in the international logistics process. The aims of this research analyse a relation between the environment uncertainty and logistics information system(LIS) and the integration and resolve the integration and its impact on logistics performance. The research methodology of this research analyse structural equation modeling on the relation of variables. The results of research are as follows. First, Environmental uncertainty significantly influences the internal integration and the external integration. Second, LIS has an influence on the logistics integration by providing the foundation for LIS utilization in international logistics process. Third, the internal integration significantly influences a logistics performance, which implies that firms should promote interaction and collaboration through internal process integration to achieve logistics performance as the logistical cost and service. But the external integration is not significantly a logistics performance.

• Human Ecology Research
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• 제54권2호
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• pp.165-180
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• 2016

This study analyzes the correlations of participation motivation, education satisfaction, and positive behavioral intention for participants in marriage enrichment programs. The survey response results for 193 participants in marriage enrichment programs were analyzed with the statistics analysis application IBM SPSS 20.0. The findings of this study are as follows. An examination of relative influence of participation motivation and education satisfaction with the positive behavioral intention of participants in marriage enrichment programs indicated that internal motivation had a positive influence on education satisfaction, external motivation had a negative influence on satisfaction for facility environment and satisfaction with employee service, and motivation had positive influence only on facility environment. An examination of the influence of participation motivation and education satisfaction with the positive behavioral intention of the participants in marriage enrichment programs indicated that internal motivation and external motivation had a high positive influence on positive behavioral intention. However, motivation did not have a significant influence on behavior after participation. In education satisfaction, satisfaction with content, satisfaction with instructor, and satisfaction with employee service had a positive influence on positive behavioral intention, however, satisfaction with facility environment had negative influence on positive behavioral intention.

• 교육시설 논문지
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• 제18권2호
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• pp.3-14
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• 2011

This study aims to identify differences and lessons in eco-school planning techniques and sustainable design methods by analyzing comparatively green building certification system and the cases of sustainable schools in US, Korea and Japan. As a result of the comparative analysis, green building certification system for school facilities, both domestic and international, is categorized into external environment, energy, materials and resources, and indoor environment. From the case study, it is common that roof garden and biotopes are installed for external environment, while energy saving, passive energy utilization methods for natural lighting and ventilation such as arrangement planning, courtyard, top-light, shading devices, solar panel and insulation by roof garden are most frequently used. Also, storm water uses, water saving equipment and sustainable materials are often introduced for resource savings. Concerns for indoor environment is frequently addressed by introducing natural light and ventilation in the buildings, which makes ultimately a comfortable space.

• 한국기록관리학회지
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• 제17권4호
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• pp.201-223
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• 2017

제 4차 산업혁명의 도래로 인한 신기술의 도입과 클라우드 업무환경으로의 변화 등의 기록관리 외부환경의 변화로 인해 기록의 생산 및 관리 환경의 변화가 예상되나 현재의 법제와 시스템 등이 이러한 외부 환경 변화에 유연하게 대응하기에는 부족한 상황이다. 기록관리 프로세스, 시스템, 인프라 영역의 제문제가 서로 얽혀있어 부분적인 개편으로는 외부환경 변화에 대응하기 어렵다. 이에 전면적인 재설계가 필요하며 이러한 전면적 개편을 '차세대 전자기록관리'로 명명하고 차세대 전자기록관리 체계 구축을 위해 전자기록관리 프로세스를 재설계할 때 고려해야 하는 주요한 이슈들과 개선방법에 대해 연구하였다.

• 한국정보통신학회논문지
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• 제5권7호
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• pp.1354-1360
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• 2001

카메라로 얻어진 화상을 근거로 계산된 속도분포를 시각정보로 이용하였으며, 이것으로부터 얻어진 대상물의 속도에 시선속도를 일치시켜 실험하였다. 즉 외란을 받은 환경에서도 안정된 화상을 얻기 위해서 외란이나 카메라 자체의 운동에 의해서 발생한 두부의 운동을 보상할 수 있는 눈의 운동이 필요하게 된다. 본 논문에서는 외란이 있는 환경에서 인간의 시선제어법 즉 시각과 평형각이 융합된 시선제어 알고리즘을 제안하고, 그에 대한 실험 결과에서 시각과 평형각이 융합된 시선제어가 시선제어만을 한 것과 비교하여 위치 편차가 적다는 것을 확인하였다. 이것은 카메라 받침대의 움직임이 각속도 센서에 의하여 보상되어 겉보기 속도가 적게 되어 속도의 추정오차도 적게 되는 효과가 있기 때문이었다.