• Current Photovoltaic Research
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• v.8 no.4
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• pp.120-123
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• 2020

Transparent photovoltaics (PV) are used in various applications such as building-integrated photovoltaics (BIPV). However, crystalline silicon (c-Si) is not used for developing transparent PV due to its opaque nature. Here. we fabficate the three holes in 6-inch c-Si solar cells using laser scribing process with an opening area ratio of about 6.8% for transparent c-Si solar modules. Moreover, we make the shingled strings using the perforated cells. Our 7 interconnected shingled string PV cells with 21 holes show a solar to power conversion of 5.721 W. In next work, we will fabricate a transparent c-Si PV module with perforated strings.

• Journal of the Society of Disaster Information
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• v.19 no.2
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• pp.421-431
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• 2023

Purpose: The purpose of this study is to analyze the safety and disaster prevention effects of the Smart Safety System used to prevent safety accidents in construction machinery and demonstrate its safety. Method: Among construction machines, the behavioral patterns of workers according to the presence or absence of a smart safety system were analyzed for excavators with high risk and frequent accidents. Result: When the smart safety system was installed in the construction machine, the safety of workers from accidents caused by constriction and collision with the construction machine was secured. Conclusion: It is judged that the smart safety system installed in construction machinery can increase the effectiveness of disaster reduction and major disaster prevention related to construction machinery.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.10 no.4
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• pp.44-54
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• 2011

Intelligent transport services on smart roads tend to have a problem at the stage of benefit-cost analysis that can not secure economic feasibility of the new services which increase early investment cost on building its infrastructure. It is expected that the number of road accidents, 'Incident/Accident', will decline through various safety services using intelligent safety facilities, intelligent transport management and so on, and that traffic congestion will also decrease. The effect of traffic congestion reduction could be the benefit by safety improvement, however current investment-analysis process in Korea does not appropriate it as a benefit. This study estimated road blocking time with 'Incident/Accident' classification and highway accident data of past three years. It also developed a generalized model by a regression analysis with a microscopical simulation. Furthermore, it suggested necessary units on quantitative analysis in order to make the developed model applicable to investment evaluation. As a result of applying the developed model to Smart-Highway Project, it showed that total safety improvement benefit is about 139 billion dollars over 30 years when it is supposed that accident decreasing rate by smart safety facilities is 10%.

• Electronics and Telecommunications Trends
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• v.29 no.2
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• pp.1-15
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• 2014

기술혁신이고용에 미치는 영향에 대한 논쟁은 산업혁명 시기부터 시작된 오래된 경제학적 이슈다. 개별 기술혁신의 영역과 성격, 산업 특성에 따라 상이한 양상으로 나타나는 고용변화를 한마디로 단정하기는 쉽지 않고 기술혁신에 따른 고용 보상효과를 실증적으로 검증하는 것 또한 어렵다. 하지만 기존의 기술혁신이 대체해온 인간의 능력이 주로 육체적인 것이었던 점에 비해 빠르게 진화 중인 스마트기술은 인간의 지적능력의 상당부분을 모사할 것으로 보여 주의가 요구된다. 인간 고유능력인 지능을 확장하고 나아가서는 자체적으로 인간 지능을 기술 자체에 내재화해 나가고 있는 스마트기술의 발전은 제조업뿐만 아니라 의료, 법률, 금융, 교육 등 복잡한 전문 지식과 상호작용이 필요한 영역의 업무환경과 고용에 영향을 미칠 것으로 전망된다. 한편 스마트기술에 의한 고용 대체가능성에 대한 경고에만 집중하는 것은 새로운 산업창출과 경제성장동력을 간과할 수 있다. 균형잡힌 미래 전망과 정책적 대비가 필요하다.

• Aerospace Engineering and Technology
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• v.10 no.2
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• pp.11-19
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• 2011

A localization development of Composite rotor blade for Smart Unmanned Aerial Vehicle(SUAV) has been conducted. Overall localization development encompassed selection of domestic composite material having similar properties to that of original one at its best, coupon tests for data base of new material properties, re-calculation of blade sectional properties, and validation of structural/dynamic design requirements such as isolation of rotor natural frequency from excitation, static and fatigue strength, aeroelastic stability. The results of all these activities are described. This paper briefly discusses the improved manufacturing process for the localization of SUAV blade.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.1
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• pp.57-67
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• 2020

Recently, smart cities are attracting attention as a solution for a plethora of urban problems, including transportation, environment, safety, and energy. However, despite a substantial body of research dealt with the concept, trends, policy, and legal institutions of smart cities, few researchers have examined how the smart city services influence the cities from the dynamic perspective that considers the entire cycle of a city, including its growth, stagnation, and decline. Thus, it is vital to understand how the city changes with time from the view that a city is a system of sub-elements-population, industry, transportation, environment, housing, and land-closely interacting together. Within this context, this study explores how the urban dynamics of Anyang-city develop for the long term using the System Dynamics method and analyzes the effect of smart city project investment on the dynamics of Anyang-city. According to the result, Anyang-city is a "mature and stable" type, and its population is expected to decrease slowly by 2040. Specifically, the Anyang-city population will be reduced to 553,000 by 2030. It was analyzed that the number will decrease to 543,000 by 2040. It was also found that the investment in smart city projects in Anyang, based on the Plan for Anyang Smart City, would have the following effects: easing population decline, increasing number of businesses, improving urban safety index, and increasing average driving speed. The population will grow by 4,000 and the number of businesses will increase by 761 than before budget investment. The result of this paper is expected to contribute to identifying and predicting the effect of smart city policies from a long-term perspective.

• Journal of the Korean Data and Information Science Society
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• v.23 no.5
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• pp.1005-1015
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• 2012

Since the smartphone was first released in 2009, its common use has made everyday life convenient but caused many social problems. In this article, we surveyed the status of smartphone usage and identified the influence of smartphone addiction on mental health, campus life and personal relations of university students. We gave the methods to prevent smartphone addiction, which could be used as basic materials for solving the problems. We found the smartphone addiction syndrome cause problems of mental health, campus life and personal relations in many ways. In addition to significant direct effects, smartphone addiction has significant indirect effects on personal relations via mental health and campus life as a medium.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.582-590
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• 2016

This study examined the relationships among smartphone addiction, parenting attitudes and resilience to identify the relevant factors affecting smartphone addiction. Data were collected from a total of 220 middle school students responding to questionnaires in G city and analyzed using descriptive statistics, independent t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson coefficient correlation, and multiple regression. The results showed that the parenting attitude and resilience were negatively correlated with smartphone addiction. The significant factors affecting smartphone addiction were gender, the time of smartphone usage, parenting attitudes, and resilience. These variables explained 21.9% of smartphone addiction and the highest factor was the parenting attitudes, followed by gender, time of smartphone usage, and resilience. This study indicated that it is important to develop a program to ensure adolescents positively perceive parenting attitudes and increase their resilience to decrease the incidence of smartphone addiction.

• Journal of Korean Society for Geospatial Information Science
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• v.19 no.3
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• pp.115-125
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• 2011

The smartphones which have been recently are embedded with high resolution quality camera, assisted GPS, accelerometer, gyroscope and various sensors including magnetometer sensor that could be directly used for measurement. This study aims to suggest the possible application of smartphone camera providing high resolution images in terms of photogrammetry by calibrating it and assessing its accuracy. First of all, prior to the accuracy assessment of smartphone camera, camera calibration was conducted to correct lens distortion of each camera and the accuracy of image coordinates and object coordinates calculated by bundle adjustment during this procedure was analyzed. Also regarding three-dimensional positioning, result analysis depending on considering lens distortion coefficients was conducted, and finally relative accuracy of smartphone camera on metric camera was assessed. The result showed that in terms of distortion correction of smartphone camera, also higher order symmetric radial lens distortion coefficients should be considered, and three dimensional position determined by smartphone images was a little difference from that by metric camera. Therefore it is expected that smartphone images have huge possibility to be used for photogrammetry.

• Informatization Policy
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• v.19 no.4
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• pp.27-45
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• 2012

Smart grid, which is a sort of convergence of numerous technologies, can be deployed only with cooperation and fair competition among various stakeholders. If the interest conflicts were not coordinated properly, related business and investment would become delayed and inactive. Therefore, this study analyzes the causes of interest conflicts and related issues in smart grid sector and suggests policy directions by issue. As the result of AHP analysis, the majority of respondents surveyed said that ambiguity of the role and authority is the key problem causing conflicts of interest in smart grid deployment process. Differences in values, communications problems, etc. are pointed as additional main reasons of the interest conflicts. To resolve interest conflicts in smart grids, the Korean government should enhance its leadership in the coordination of stakeholders' interests. Government should make efforts to coordinate the various interests in terms of the development of the smart grid market and win stakeholders' sympathy of their desirable roles in the smart grid market.