• Structural Monitoring and Maintenance
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• 제7권3호
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• pp.261-281
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• 2020

Civil structures may experience progressive deterioration and damage under environmental and operational conditions over their service life. Finite element (FE) model updating method is one of the most important approaches for damage identification in structures due to its capabilities in structural health monitoring. Although various damage detection approaches have been investigated on structures, there are limited studies on large-sized space structures. Thus, this paper aims to investigate the applicability and efficiency of sensitivity-based FE model updating framework for damage identification in large space structures from a distinct point of view. This framework facilitates modeling and model updating in large and geometric complicated space structures. Considering sensitivity-based FE model updating and vibration measurements, the discrepancy between acceleration response data in real damaged structure and hypothetical damaged structure have been minimized through adjusting the updating parameters. The feasibility and efficiency of the above-mentioned approach for damage identification has finally been demonstrated with two numerical examples: a flat double layer grid and a double layer diamatic dome. According to the results, this method can detect, localize, and quantify damages in large-scaled space structures very accurately which is robust to noisy data. Also, requiring a remarkably small number of iterations to converge, typically less than four, demonstrates the computational efficiency of this method.

• Nuclear Engineering and Technology
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• 제55권4호
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• pp.1199-1209
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• 2023

Where concrete structures are designed to have a service life of over 100 years, their performance must be monitored, for the prediction models available are fraught with uncertainties that need to be eliminated. The present study was conducted to meet that need by monitoring a pilot structure for low and intermediate radioactive waste storage. Long-term operation of the sensors was observed to be adequate to determine the value of the parameters that characterise structural durability, such as corrosion current density. The parameters analysed were correlated to calculate their reciprocal impact: where applied in conjunction with artificial intelligence tools, temperature, for instance, was found suitable for finding activation energy and expansion coefficients and detecting outliers. The results showed the pilot structure to perform satisfactorily.

• 공학교육연구
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• 제15권5호
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• pp.82-86
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• 2012

These days, the cruise tourist industry is one of the most dynamic and fastest growing components of the leisure industry in the world. Therefore, the cruise ship with ubiquitous technology is expected to enhance the operation efficiency of the ship. It can also provide valuable addition to the ship's service as well as high quality of life to crews and passengers. Since a large number of passengers are dwelling in cruise ship, all passengers are not easy to use ship's facilities, such as restaurants, fitness center, swimming pool and spa at anytime they want. In this paper, passenger service system in ship environment is tested in similar environment and under ship operation condition. We have proposed three applications of ubiquitous technology using Zigbee communication and LabView program.

• 디지털산업정보학회논문지
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• 제6권3호
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• pp.1-8
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• 2010

Recently, the missing due to the heinous crimes occurred in succession has been the focus of attention, so measures for these are urgently needed. So, it is necessary that we need to check and take care the weak like children, women, the elderly with dementia and insane person to prevent these social problems. This study is location-based service that suggests the tracking system and way to guard a family and property from the various risk factors which are possible in our life. To acquire the location of the user who is in motion, a communications network technologies were integrated and the system will be able to be monitoring in real time through the website. So, it is convenient and safe because it is possible to use anywhere. Concretely, it was described around location-based service, GPS system, tracking system, process of the service solution and composition for the system. Also, the way to activate the system will be suggested. The final suggested system was verified the possibility through the placement. With this, i will offer effective measures which is more convenient to use and reliable.

• 디지털융복합연구
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• 제17권9호
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• pp.301-310
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• 2019

본 연구는 생애말기케어에 대한 수혜 자격, 서비스 및 전달유형, 질 관리에 대해 검토하고 생애말기케어 시스템을 위한 서비스 질 관리 방법을 분석하는 것을 목적으로 한다. 한국의 보건복지부와 미국의 Centers for Medicare and Medicaid Services에서 발간한 문헌과 법령을 수혜 대상자, 서비스 종류 및 전달유형, 질 관리에 대해 고찰하고 비교 분석하였다. 한국은 진단명을 기준으로 의료기관에서 입원 기반 서비스를 제공하고 있으며, 질 관리는 인력, 시설, 장비에 대한 기준을 만족하는 구조적 영역에서만 이루어지고 있었다. 미국은 한국보다 수혜 대상자에 대한 기준이 넓으며, 민간 독립기관에서 가정기반 서비스를 제공하고 있었다. 질 관리는 기관 지정과 성과지표 모니터링 및 소비자 만족도와 같은 결과를 포함하여 평가해 기관 보상과 연계하고 있었다. 현 연구를 통한 국가간 차이점은 향후 국내의 정책에 반영하여, 보다 발전된 시스템 구축에 방향설정에 기여를 하였다. 따라서, 향후 생애말기케어 시스템의 서비스의 질 관리와 적절한 서비스를 제공하기 위한 다양한 국가의 시스템을 지속적으로 연구할 필요가 있고, 이러한 제도 고찰을 통한 국내 시스템을 개선하고 보강하여야 한다.

• 실천공학교육논문지
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• 제16권4호
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• pp.491-497
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• 2024

최근 5년간 10대와 20대에서 부정맥 심장 질환 환자의 비율이 증가하고 있다. 심장 질환이 우리나라 사망원인 2위를 꾸준히 유지하며 수가 증가함에 따라 부정맥을 통한 심전도 검사가 중요해졌으나 심전도 전문 의료기기의 경우 경제적으로 부담이 되고, 큰 부피와 작동이 어려워 개인별 소장이 힘들다는 문제점으로 병원 방문을 통해 검사가 진행된다. 따라서 본 연구에서는 AD8232 센서를 활용하여 데이터를 측정하고, 실시간 모니터링을 통해 생체신호의 변화를 파악할 수 있도록 제공한다. 또한 개인의 민감정보 보호를 위해 세션 및 사용자 인증을 SSL기반으로 개인정보를 보호할 수 있는 개인 맞춤형 웹 서비스를 개발하였다.

• 한국환경교육학회지:환경교육
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• 제19권3호
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• pp.183-199
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• 2006

The purpose of this study is to develop an in-service teacher training program for professional development in environmental education. In order to achieve the goal, the in- service teacher training program for professional development in environmental education development / implement team is formed to deal with the development and the implementation of the program. The team is composed of environmental education professionals and environmental education teachers. After the development of the program, 20 teachers were selected to implement the program. Then, through various researches such as interview, monitoring, and survey, the evaluation of the program was done. After the evaluation, the feedback on the program was collected in order to apply the final adjustments and changes to the developed training program for professional development in environmental education. The training program is designed to include the wide range of theories and real life cases. It focuses on certain topic, and is implemented through workshop type training method to increase the participation rate. The major motive of the participants was to develop their professionality in environmental education. Based on the analysis of the training program and the workshop, 69.1% of the program is focused on the environmental education/learning theory, and 71.4% is focused on the environmental education teaching method. The environmental education teaching method is focused on the real life teaching method that could be used in many schools. However, the parts on environmental education philosophy, psychology, and evaluation was not included as a part of the program. Also, the evaluation method of the students learning the environmental education was not introduced as a part of the program as well. It is due to the limited time frame of the training program, as well as its focus on the training method of environmental program. Based on the analysis of the evaluation results obtained through monitoring, the training program for professional development in environmental education is successful in terms of focusing the goal of the program around the environmental education/learning theory and environmental education teaching method, which was the motive of the participants. However, the effectiveness of the program differed from participants to participants based on their majors in environmental education, and it did not last long enough. The future training program for professional development in environmental education should consider the backgrounds of the program participants to have various programs prepared for various groups of people. We suggest that the results of this developed program will be applied to "environmental education teacher licence training" in the future.

• 한국통신학회논문지
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• 제39C권9호
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• pp.828-840
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• 2014

사물을 인터넷에 연결시키는 기술인 Internet of Things(IoT)는 새로운 연구분야가 되어 기술적으로 많은 발전이 이루어져왔다. 이러한 IoT 기술은 사물을 관찰하거나 다루는데 있어 쉽게 접근하도록 하여 네트워크 상에서 인터넷으로 데이터의 전달을 가능하게 한다. 이는 두가지의 인프라를 필요로 하는데 하나는 데이터를 수집하는 Sensing Entity이고 다른 하나는 데이터를 점유하는 Sensor Cloud이다. 여기서 무선 센서 네트워크는 사물로부터 측정되는 데이터를 인터넷에 연결시키는데 매우 중요한 역할을 하는데 간단한 컴퓨팅 디바이스나 Arduino, Raspberry Pi와 같은 임베디드시스템으로 구성될 수 있다. Sensor Cloud는 사물로부터 측정되어 나오는 데이터의 공유나 처리를 하도록 하는 클라우드 컴퓨팅으로 모니터링 혹은 컨트롤 시스템에 대한 플랫폼을 제공한다. 본 논문에서는 의약품의 저장 조건들을 모니터링 하는 Cold Chain을 제안한다. 제안된 Cold Chain은 생산에서 소비단계까지 이르는 이동이나 저장상태에 대한 여러 환경적 조건인 습도, 온도, 저장 장소 등을 모니터링 하는 시스템이다. 시스템은 두개의 부시스템으로 구성되는데 하나는 이동에 관련된 것을 다루고 다른 하나는 저장에 관련된 것을 다룬다. 이 두 개의 시스템은 보다 향상된 모니터링 방법을 제공하기 위해 Sensor Cloud 시스템으로 통합된다.

• 한국IT서비스학회지
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• 제20권5호
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• pp.137-146
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• 2021

Recently, public participation in government policy design has been further expanded and public services perceived by users are expanding. At this time, the role of the digital government and the direction of the service to be pursued are user-centered, and above all, it is necessary to focus on the keywords of pre-emptive, preventive, and customized. In order to propose service quality improvement in the public sector, service user-centered classification and monitoring are integrated and the usability of government documents is improved. It is necessary to identify the needs of whether to provide a path for public participation. In the post-corona era, people are accessing quarantine information from the digital government every day. The government should proactively respond to the acceleration of digital transformation and the non-face-to-face demands of the people who experience non-face-to-face daily life. In order to evolve into a smart organization along with the innovation promotion plan and to provide customized services, it is necessary to use existing guides for institutional and technical improvement, along with new technology and data-based analysis, to strive for change management. The government should seek counter-measures that have advanced one step ahead by incorporating new high-tech IT with user-centered necessary services. This study aims to derive improvement plans to provide user-centered digital government service design when designing public services and collecting public opinions. Based on the e-government development model research and the existing research on user-centered service design in the public sector, institutional and technical measures are provided for the improvement of digital government service design.

• International Journal of Internet, Broadcasting and Communication
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• 제14권1호
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• pp.122-128
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• 2022

Minimization of human casualties in disaster situations is of paramount importance. In particular, if a marine disaster occurs, it can be directly connected to human casualties, so prompt action is needed. In the event of a marine disaster, the route and location of movement should be identified and life tubes should be used to float on the water. This paper designs and proposes an emergency IoT notification system that can quickly rescue drowning people. The maritime emergency IoT notification system consists of four main types. First, an emergency IoT device that detects the expansion of the life tube and delivers location and situation information to the emergency IoT notification server. Second, an emergency IoT web server that manages emergency information and provides notification. Third, a database server that stores and manages emergency IoT notification information. And finally, an emergency notification app that can receive and respond to emergency notification information. The emergency IoT device consists of a TPMS(Tube Pressure Monitoring System) device that checks the pressure value of the TPMS in real time and sends it to the IoT device, and an IoT device that sends the rescuer's voice information and emergency information to the emergency IoT server. Emergency information is delivered using the MQTT(Message Queuing Telemetry Transport) protocol, and voice information is delivered to the IoT server as HTTP FormData.