• International Journal of Advanced Culture Technology
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• 제4권2호
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• pp.34-37
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• 2016

Internet was once used to link ideas, then people and now it is starting to connect all things. IoT constitutes a good paradigm to enable people to design and modify things, and then share their designs and modifications. Through the internet, things nowadays are able to exchange raw data and information, thus enabling the development of a new class of interconnected smart objects. Smart building block toy systema are a newly proposed concept that combines internet technology into educational blocks. It is composed of the IoT environment that has attracted attention recently. In this paper, we design a system using starUML, one of the program development tools in the system design process. Educational content can be shared to learners via the proposed service of the IoT, while also being interesting for young child learners.

• International Journal of Computer Science & Network Security
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• 제21권7호
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• pp.1-7
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• 2021

An amazing growth in the field of Internet of Things (IoT) and Blockchain based smart cities from both industry and academia has been witnessed in the recent years. There are many smart applications such as intelligent transportation, smart banking, improving the life style of citizen, energy consumption and managing the waste in the city, handling home needs are supporting the Smart city concept. These applications are profoundly supported by the advanced technologies like Blockchain as well as IoT in the recent past. Smart cities can be supported by the Blockchain core concepts such as secure, transparent, decentralized and immutable nature. Still, Blockchain and IoT technologies implementation in smart cities are in their early stages and significant research efforts are desirable to integrate them. This review article explores the roles and responsibilities of Blockchain and IoT in building smart cities.

• 전자통신동향분석
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• 제34권5호
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• pp.36-47
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• 2019

Smart window technology has become a major component of smart buildings, leading to energy savings and enhanced functionality. Smart windows work like curtains or blind screens, blocking external light sources. Smart window components employ electrochromic or photochromic materials that can selectively block sunlight when electricity is applied. The installation of low-E glass and building-integrated photovoltaics (BIPV) is being encouraged in accordance with the policy on saving building energy. To incorporate BIPV into smart windows, the transparency and colors of transparent photovoltaics must be optimized. The power sources required to operate these smart windows take advantage of the transparent color of the solar cells, which also facilitates aesthetics. Self-powered smart windows that combine electrochromic or photochromic screens with transparent solar cells suggest a promising convergent technology.

• 디지털융복합연구
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• 제17권3호
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• pp.215-220
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• 2019

블록체인은 데이터의 조작을 방지하고 무결성 및 신뢰성을 보장하는 기술이다. 이더리움(Ethereum)은 블록체인을 기반으로 하는 암호화폐 시스템의 한 종류로 스마트컨트랙트의 사용 환경을 구축하고 있다. 스마트컨트랙트는 조건이 충족되면 즉시 시행되기 때문에 디지털 데이터에 대한 신뢰도를 더욱 높일 수 있다. 그러나 다양한 시도가 진행되는 스마트컨트랙트는 정보보안 및 개인정보 보호가 이루어지지 못하고 있다. 네트워크 참여자가 공개된 거래원장을 볼 수 있는 구조는 블록체인에 등재된 데이터나 개인 정보가 노출될 위험이 있다. 본 연구에서는 블록체인으로 기록되는 개인정보의 데이터를 자신이 직접 관리할 수 있도록 하였다. 개인정보의 노출을 방지했고 타임코드를 달아 일정기한이 경과하면 기록정보의 파기실행을 하도록 하여 개인정보를 보호하였다. 향후 제안한 시스템을 기반으로 알려지지 않은 코드결함이나 개인정보 보호의 추가적 관리 기술의 연구가 필요하다.

• 대한수학교육학회지:수학교육학연구
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• 제24권2호
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• pp.269-283
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• 2014

최근 수학교육 선진화 방안과 함께 3S 수학교육 (Storytelling 수학교육, SMART 수학교육, 그리고 STEAM 융합 수학교육)으로 수학교육 연구와 실천에 다이내믹한 변화가 요구되고 있다. 본 연구에서는 최근에 연구된 스토리텔링 모델 교과서 연구(한국과학창의재단, 2013)를 바탕으로 초등학교 쌓기나무에 대한 실행식(executable expression) 기반 스마트 스토리텔링 수학교육을 디자인하여 제안한다. 연구의 배경에서는 최근에 강조되는 SMART 수학교육과 Papert의 LOGO 마이크로월드를 기반으로 하는 스토리텔링 수학교육에 대하여 살펴 본다. 그리고 이론적 배경으로 기호학, 체화된 인지이론 및 실행식(executable expression)에 관하여 알아 본다. 나아가 실행식 기반 스마트 스토리텔링 수학교육을 실제 교육과정과 비교하여 일차함수, 확률 단원에서 어떻게 다루어질 수 있는지 살펴본다. 또한 실행식 기반 3D 프린터와 같은 공학 기기를 이용하여 가상 세계와 현실 세계 사이의 매개가 가능함을 보인다.

• International journal of advanced smart convergence
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• 제5권2호
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• pp.8-17
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• 2016

Scratch-based programming has come to be known as an effective programming tool because of its graphic instruction modules, which are designed to be assembled like the famous LEGO building blocks. These building block-like structures allow users to more easily program applications without using other more difficult programming languages such as C or Java, which are text-based. Therefore, it poses a good opportunity for application in educational settings, especially in primary schools. This paper presents an effective approach to developing an educational robot for use in elementary schools. Furthermore, we present the method for scratch programming based on the external modules need for the implementation of robot motion. Lastly, we design a systematic curriculum, titled "Play with a Robot," and propose guidelines to using the educational programming language Scratch.

• 한국컴퓨터정보학회논문지
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• 제28권1호
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• pp.79-86
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• 2023

건설은 인간에게 생활의 편안함을 제공하는 가장 오래된 분야 중 하나이다. 그러나, 현재 IT 분야뿐만 아니라 다른 분야의 지속적인 발전에도 불구하고 여전히 낮은 자동화로 인한 생산성 저하가 심각한 수준이다. 특히 건설 분야에서 4차 산업혁명 기술의 활용은 이제 막 시작한 단계이다. 블록체인은 4차 산업혁명 기술 중 하나로서, 여러 장소, 국가 또는 조직과 같은 다양한 지리적 위치에 분산된 데이터를 복제, 공유 및 동기화하는 데 사용되는 일종의 분산 데이터베이스이다. 본 논문에서는 블록체인을 소개하고 이를 활용한 건설 분야의 사례를 일곱 가지 주제별로 문헌 분석한다. 분석 결과, 건설 분야에서 블록체인 기술의 이해도를 높이고 향후 다양한 서비스 개발에 유용성을 제공할 것으로 기대된다.

• 한국정보시스템학회지:정보시스템연구
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• 제26권4호
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• pp.63-85
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• 2017

Purpose Recently, much attention in building smart factory has dramatically increased with an emergence of the Industry 4.0. As we noted a connectivity gap between main concerns of MIS and the automated manufacturing systems such as POP and MES, it is recommended that CPS (Cyber-Physical System) can be an important building block for the smart factory and enrich the depth of MIS knowledge. Therefore, first, this study attempted to identify the connectivity gap between the traditional field of MIS (ERP, SCM, CRM, etc.) and the automated manufacturing systems, and then recommended CPS as a technical bridge to fill the gap. Secondly, we studied concepts and research trend of CPS that is believed to be a virtual mechanism to manage manufacturing systems in an integrated manner. Finally, we suggested research and educational opportunities in MIS based on the CPS perspectives. Design/methodology/approach Since this paper introduced relatively new idea of CPS originally discussed in the field of engineering, traditional MIS research method such as survey and experiment may not fit well. Therefore this research collected technical cases through literature survey in engineering fields, video clips from Youtube, and field references from various ICT Exhibitions and Conventions. Then we analyzed and reorganized them to highlight the necessity of CPS and draw some insight to share with MIS academia. Findings This paper introduced CPS to bridge the connectivity gap between the traditional MIS and automated manufacturing system (smart factory), a concern far away from the MIS academia. Further, this paper suggested future research subjects of MIS such as developing software to share big production data and systems to support manufacturing decisions, and innovating MIS curricula including smart and intelligent manufacturing technology within the context of traditional enterprise systems.

• Smart Structures and Systems
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• 제18권6호
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• pp.1111-1123
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• 2016

The present study aims at proposing an analytical method for semi-active structural control by using block pulse functions. The performance of the resulting controlled system and the requirements of the control devices are highly dependent on the control algorithm employed. In control problems, it is important to devise an accurate analytical method with less computational expenses. Block pulse functions (BPFs) set proved to be the most fundamental and it enjoyed immense popularity in different applications in the area of numerical analysis in systems science and control. This work focused on the application of BPFs in the control algorithm concerning decrease the computational expenses. Variable orifice dampers (VODs) are one of the common semi-active devices that can be used to control the response of civil Structures during seismic loads. To prove the efficiency of the proposed method, numerical simulations for a 10-story shear building frame equipped with VODs are presented. The controlled response of the frame was compared with results obtained by controlling the frame by the classical clipped-optimal control method based on linear quadratic regulator theory. The simulation results of this investigation indicated the proposed method had an acceptable accuracy with minor computational expenses and it can be advantageous in reducing seismic responses.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.51-52
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• 2023

Recently, heat island and dry island phenomena occur frequently due to land surface development and excessive energy consumption in urban areas. As a result, the surface temperature of the building and the entire temperature of its surroundings are increased, and as a result, the durability of the building is rapidly deteriorated. In order to suppress these causes, a method of maintaining the temperature of road heating wires was implemented as a temporary measure, but this did not predict climate change. Therefore, this study is a method to measure the compressive strength, density, and thermal conductivity of light weight concrete using waste glass foam beads. After fabricating a simple chamber, the temperature and humidity of the inside and outside were measured with an Arduino device in consideration of external factors. Therefore, if waste glass foam beads made through proper mixing are constructed in the urban center, the quality of the urban can be improved.