• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.10
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• pp.1302-1309
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• 2021

Recently, the Korean Government announced the Korean New Deal as a national development strategy to overcome the economic recession from the pandemic crisis and lead the global action against structural changes. In the Korean New Deal, the Green New Deal related with the energy aims to achieve net-zero emissions and accelerates the transition towards a low-carbon and green economy. To this end, the government plans to promote an increased use of renewable energy in the society at large. This paper introduces a binary power generation using unused low-grade thermal energy to accelerate the transition towards a low-carbon and green economy and examines a control system based on Neural Network which is capable maintenance at low-cost by an unmanned automated operation in actual power generation environment. It is expected that the realization of binary power generation accelerates introduction of renewable energy along with solar and wind power.

• Korean Journal of Agricultural and Forest Meteorology
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• v.24 no.4
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• pp.318-329
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• 2022

Plant phenology including flowering, leaf unfolding, and leaf coloring in a forest is important to understand the forest ecosystem. Temperature rise due to recent climate change, however, can lead to plant phenology change as well as snowfall in winter season. Therefore, accurate monitoring of forest environment changes such as plant phenology and snow cover is essential to understand the climate change effect on forest management. These changes can monitor using a digital camera system. This paper introduces the detection methods for plant phenology and snow cover at the mountain region using an unmanned camera system that is a way to monitor the change of forest environment. In this study, the Automatic Mountain Meteorology Stations (AMOS) operated by Korea Forest Service (KFS) were selected as the testbed sites in order to systematize the plant phenology and snow cover detection in complex mountain areas. Multi-directional Internet Protocol (IP) camera system that is a kind of unmanned camera was installed at AMOS located in Seoul, Pyeongchang, Geochang, and Uljin. To detect the forest plant phenology and snow cover, the Red-Green-Blue (RGB) analysis based on the IP camera imagery was developed. The results produced by using image analysis captured from IP camera showed good performance in comparison with in-situ data. This result indicates that the utilization technique of IP camera system can capture the forest environment effectively and can be applied to various forest fields such as secure safety, forest ecosystem and disaster management, forestry, etc.

• Electronics and Telecommunications Trends
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• v.26 no.6
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• pp.21-36
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• 2011

우리나라 전체 에너지 사용량의 40% 정도를 차지하고 있는 아파트형 주거 밀집공간, 대규모 상업건물, 정부 및 대기업의 사무용 공공건물에서 에너지 사용을 절감하기 위한 방안으로 기존 건물 위주의 수동적 제어방법에서 한 단계 앞선 최신의 ICT 기술을 접목하여 능동적으로 건물 에너지를 관리하는 방법이 강구되고 있다. 특히 소비자의 움직임 및 사용공간 정보를 활용하여 소비자의 만족도를 저해하지 않으면서 건물의 에너지 사용량을 최소화하기 위한 기술이 논의되고 있다. 즉, 조명, 냉난방/공조, 전기기기의 에너지 사용량을 30%까지 절감하기 위한 기술이 연구되고 있는데, 본 고에서는 사용자의 만족도는 향상시키면서 건물 에너지는 절약할 수 있는 기술동향에 대해 언급한다.

• Environmental Engineering Research
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• v.23 no.4
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• pp.430-441
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• 2018

The adverse health impact of air pollution is becoming more serious. The purpose of this study is twofold: One is to analyze the effect of air pollution and temperatures on human health by analyzing the number of deaths from cardiovascular disease in Seoul, Korea; the other is to determine what impact the location of a monitoring site has on the results of a health study. For this latter purpose, air pollution and temperature monitors are sited at three locations termed green, public, and residential. Then, a decision tree model is used to analyze factors linked with deaths occurring at each monitoring site. The results show that the environmental temperatures before death and the $PM_{2.5}$ concentrations on the day of death are highly linked with the number of deaths regardless of the monitoring location. However, results are most accurate with residential data. The results of this study can be used as base data for a similar analysis and ultimately, as a guide to minimize the health impact of air pollution.

• Journal of Korea Game Society
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• v.17 no.5
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• pp.89-102
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• 2017

With the increase in interest in health in the society, a variety of fusion studies have been conducted by ICT to sports. This study develops a smart bicycle that is run only when a rider maintains balance, and proposes an interface of studio space where the smart bicycle can be experienced. The studio consists of interactive smart bike, a geodesic dome for immersion of content for a single person, and virtual reality content that is implemented to enjoy various sceneries in real space. This study contributes to attempts of design and production of studio that is optimized to interactive space of smart bike for single person. This studio has a scalable interface, which can be applicable to various other interactive contents for sportainmnet.

• Journal of Convergence Society for SMB
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• v.2 no.1
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• pp.69-75
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• 2012

As the global warming and climate change cause the various social problems, such as disasters, abnormal temperature and diseases, technologies and studies for energy conservation and efficiency are increased. Energy use in buildings accounted for 22% of national energy use, so energy saving technology is promoted for residence, commercial and public buildings. Existing methods for energy conservation are passive ways, in that they consider heat loss and low-energy equipment. In recent years, active technologies emerge by converging with ICT, which detect and remove the energy waste situation by measuring, monitoring and controlling the energy use. In this paper, we describe technology trends for building energy optimization and investigates issues for active energy savings.

• Journal of Korean Society of Transportation
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• v.30 no.5
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• pp.11-21
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• 2012

As a strategy to enhance traffic management, roundabouts come to the fore recently to decrease traffic accidents, streamline traffic flows, and expedite the realization of green transportation. As local governments introduced roundabouts, new road sign standards have to be established because the existing road sign regulations cannot be applied to roundabouts. Prior to trying to make suitable specification of sub-destination signs in roundabouts, regulations of other countries were examined and modified. The legend and location was calculated so that drivers could turn in time. Two specifications were determined by simulation experiments. As a result, drivers could read signs at right side better than at traffic island, and turn in time at 15cm legend size. Consequently, we proposed the minimum specifications and optimal locations of sub-destination signs.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.11
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• pp.1121-1128
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• 2016

Our country of agriculture suffers problems such as aging, population decline, agricultural decline etc. To solve this problem, in the country, it is interest in Smart Farm System, a convenient and efficient system for the production through the convergence of ICT technology and agriculture. However, because of expensive construction costs and difficulty in securing human resources and training for Operating system, they are struggling to spread the actual farmers. Therefore, it is necessary to develop smart farm techniques suitable for such customized domestic environment. This study designed a system for collecting environment date in a greenhouse based on the low-cost embedded devices, and designed and implemented for the Web application that a user can easily use system. The implementation of the system lowers deployment costs and is expected to increase largely the spread of Smart Farm it can be easily accessed by using the smart phone.

• Journal of the Korean Electrochemical Society
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• v.18 no.1
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• pp.31-37
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• 2015

Composition-controlled ternary components chalcogenides germanium tin sulfide ($Sn_xGe_{1-x}S$) nanoparticles were synthesized by a novel gas-phase laser photolysis reaction of tetramethyl germanium, tetramethyl tin, and hydrogen sulfide mixture. Subsequent thermal annealing of as-grown amorphous nanoparticles produced the crystalline orthorhombic phase nanoparticles. All these composition-tuned nanoparticles showed excellent cycling performance of the lithium ion battery. The germanium sulfide nanoparticles exhibit a maximum capacity of 1200 mAh/g after 70 cycles. As the tin composition (x) increases, the capacity maintains better at the higher discharge/charge rate. This novel synthesis method of tin germanium sulfide nanoparticles is expected to contribute to expand their applications in high-performance energy conversion systems.

• Journal of Korean Society of Rural Planning
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• v.23 no.4
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• pp.49-59
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• 2017

The importance of information system evaluation has increased according to ICT development and this evaluation is required for objective verification. The aim of this study is to develop evaluation indicators for web-based information system and verify the availability of these evaluation indicators through applying to agricultural water integrated information system. This study finds and provides eight evaluation items and 64 indicators for a web-based information system using $3{\times}3$ Mandal-Art matrix that is a tool for creating creative ideas. These evaluation items are design, contents, navigation, stability, community, convenience, usefulness, and accuracy. Total 64 evaluation indicators were presented by deriving eight evaluation items for each using $9{\times}9$ Mandal-Art matrix. When evaluating information system using evaluation indicators, it can be identified the vulnerable items in the information system. Also, the comprehensive results of the information system could be understood when appearing a single score after weighting. In addition, it can also help to prepare a questionnaire for evaluation systematically.