• 소성∙가공
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• 제32권3호
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• pp.153-159
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• 2023

This paper presents the optimal design of a heating system using radiant heating elements for application in smart farms. Smart farming, an advanced agricultural technology, is based on artificial intelligence and the internet of things and promotes crop production. Temperature and humidity regulation is critical in smart farms, and thus, a heating system is essential. Radiant heating elements are devices that generate heat using electrical energy. Among other applications, radiant heating elements are used for environmental control and heating in smart farm greenhouses. The performance of these elements is directly related to their electrical energy consumption. Therefore, achieving a balance between efficient electrical energy consumption and maximum heating performance in smart farms is crucial for the optimal design of radiant heating elements. In this study, the size, electrical energy supply, heat generation efficiency, and heating performance of radiant heating elements used in these heating systems were investigated. The effects of the size and electrical energy supply of radiant heating elements on the heating performance were experimentally analyzed. As the radiant heating element size increased, the heat generation efficiency improved, but the electrical energy consumption also increased. In addition, increasing the electrical energy supply improved both the heat generation efficiency and heating performance of the radiant heating elements. Based on these results, a method for determining the optimal size and electrical energy supply of radiant heating elements was proposed, and it reduced the electrical energy consumption while maintaining an appropriate heating performance in smart farms. These research findings are expected to contribute to energy conservation and performance improvement in smart farming.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2006년도 추계학술발표대회 논문집
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• pp.70-73
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• 2006

In late 20th century, smart home market evolved in China, and absorbed best manpower and technology to commercialize the smart home equipment. Many foreign companies want to take possession of Chinese market, but not arrive at abundance yet. There has many reasons, but most important thing is ignoring the interaction between technical elements and spacial elements. in other words, ignoring the correlation between each industry. Korean smart home market evolved same period with Chinese, but it has balanced development in technic and application, so the commercialize and market arrived at poverty. In this study, survey the present situation of smart home about Korea and China, and compare the technical elements. In addition to analysis the interaction between smart spacial contents and technology. This study focused on the smart apartment, and analysis the strength and weakness in each country, and make theoretical basement for Korea to make certain about Chinese smart home market.

• Journal of Smart Tourism
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• 제1권1호
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• pp.31-39
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• 2021

Smart tourism, a promising development trend for destinations, has drawn growing attention from practitioners and academics. Extant research has laid a solid theoretical foundation on the roles of technology and effects of smart tourism on tourists. However, little is known about structured and profound implications for a destination's smart tourism development. Thus, by selecting Hong Kong as a case city, this study proposes a framework of implications for smart tourism development. A qualitative approach was employed to gain insights from smart tourism stakeholders. Results shed light on nine elements that boost the smart tourism development of destinations. These nine elements serve as a significant reference for policy-making. Several theoretical and practical implications are provided for scholars, practitioners, and policy makers.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(1)
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• pp.49-52
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• 2001

A virtual antenna system is presented to increase the channel capacity of a smart antenna in cdma2000. Although a smart antenna system can increase channel capacity by forming a beam to a desired user direction, an increase of channel capacity is limited by the number of antenna elements. A virtual antenna is proposed to improve the channel capacity by increasing the degree of freedom. The results show that the proposed system has a larger channel capacity than a conventional smart antenna system for the same number of antenna elements.

• Archives of Metallurgy and Materials
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• 제67권4호
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• pp.1539-1542
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• 2022

Artificial intelligence operated with machine learning was performed to optimize the amount of metalloid elements (Si, B, and P) subjected to be added to a Fe-based amorphous alloy for enhancement of soft magnetic properties. The effect of metalloid elements on magnetic properties was investigated through correlation analysis. Si and P were investigated as elements that affect saturation magnetization while B was investigated as an element that affect coercivity. The coefficient of determination R²(coefficient of determination) obtained from regression analysis by learning with the Random Forest Algorithm (RFR) was 0.95 In particular, the R² value measured after including phase information of the Fe-Si-B-P ribbon increased to 0.98. The optimal range of metalloid addition was predicted through correlation analysis method and machine learning.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1001-1008
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• 2022

As a part of the Smart Cities Mission, the Government of India in 2015 embarked upon the development of 100 existing cities as smart cities. In this study, the authors selected Ahmedabad city as the smart city development in India and presented project-level elements of the city based on the secondary data availability. At first, the authors focused on peer-reviewed articles, policy documents, and technical reports. Next, the authors collected the secondary data of project-level elements of the Ahmedabad city from the years 2015 to 2019. The findings show no significant improvement in the sewage system and waste collection as compared to the level of investment made in these sectors. The study showed that the water supply system outperformed revenue generation based on the government investment made in that sector. As a lesson learned, these findings indicate that significant improvement should be addressed in sewage management and waste collection. These study findings could help government officials, investors, developers, and city planners in making the appropriate decision before and during smart city execution. The lesson learned from this study could be used as a reference to improve revenue during the future smart city implication.

• 대한토목학회논문집
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• 제39권4호
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• pp.541-549
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• 2019

최근 우리나라는 4차 산업혁명 시대와 함께 도시문제 해결방안으로 스마트시티가 각광받고 있다. 그러나 관광, 산업, 특정 고급 주거단지로만 조성이 되고 있으며 정작 실질적으로 도움을 받아야 할 노인이나 장애인 등 정보약자들은 체감하지 못하고 있다. 본 연구는 국내에 적합한 스마트시티 개념을 정립하고, 정보약자를 고려한 스마트시티의 전문가 관점과 실제 정보약자 관점에서의 물리적 비물리적 구성요소의 우선순위를 도출하고, 비교 분석하였다. 정보약자를 고려한 스마트시티는 물리적인 요소뿐만이 아닌 비물리적 구성요소도 중요하다는 결론과 전문가와 실제 정보약자의 우선요소의 차이점을 도출하였으며, 정보약자의 니즈를 반영하여 개발 발전될 수 있는 정보약자를 고려한 스마트시티 조성방향을 제시하고자 한다.

• 문화기술의 융합
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• 제9권6호
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• pp.1017-1029
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• 2023

블록체인을 통해 많은 양의 거래가 일어나고 있다. 그중에서도 스마트 계약을 통한 거래의 비중이 커지고 있다. 이에 따라 스마트 계약에 대한 취약점 공격과 스마트 계약을 이용한 사기와 같은 문제점들도 증가한다. 스마트 계약에 대한 보안 감사를 통해 개발자는 취약점을 발견해 해결할 수 있고, 이용자는 스마트 계약의 사기 여부를 구분할 수 있다. 하지만 현재 스마트 계약에 대한 보안 감사에 대한 규정과 표준이 없으므로 보안 감사를 수행하는 서비스들이 불균일하다. 본 논문에서는 스마트 계약에 대한 보안 감사 동향을 분석하고 어떠한 서비스들이 제공되고 있는지 파악한다. 보안 감사 보고서를 중심으로 스마트 계약으로부터 어떠한 요소들을 분석하는지 조사한다. 또한 어떠한 취약점들을 검출할 수 있는지 조사한다. 마지막으로 스마트 계약에 대한 품질 지표와 설계 추출의 가시화 요소를 조사한다. 이를 통해 스마트 계약에 특화된 가시화 요소를 찾을 수 있을 것을 기대한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권8호
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• pp.4006-4024
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• 2017

Internet of Things (IoT) will transform our daily life by making different aspects of life smart like smart home, smart workplace, smart health and smart city etc. IoT is based on network of physical objects equipped with sensors and actuators that can gather and share data with other objects or humans. Secure communication is required for successful working of IoT. In this paper, a total of 13 lightweight cryptographic algorithms are evaluated based on their implementation results on 8-bit, 16-bit, and 32-bit microcontrollers and their appropriateness is examined for resource-constrained scenarios like IoT. These algorithms are analysed by dissecting them into their logical and structural elements. This paper tries to investigate the relationships between the structural elements of an algorithm and its performance. Association rule mining is used to find association patterns among the constituent elements of the selected ciphers and their performance. Interesting results are found on the type of element used to improve the cipher in terms of code size, RAM requirement and execution time. This paper will serve as a guideline for cryptographic designers to design improved ciphers for resource constrained environments like IoT.

• International Journal of Advanced Culture Technology
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• 제7권3호
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• pp.143-148
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• 2019

In order to solve the urban problems caused by the increase of the urban population, the construction of smart city applying the latest technology is being carried out all over the world. In particular, we will create a smart city platform that utilizes data generated in the city to collect and store and analyze, thereby enhancing the city's continuous competitiveness and resilience and enhancing the quality of life of citizens. However, existing smart city platforms are not enough to construct a platform for smart city as a platform for solution elements such as IoT platform, big data platform, and AI platform. To complement this, we will reanalyze the existing overseas smart city platform and IoT platform in a comprehensive manner, combine the technical elements applied to it, and apply it to the future Korean smart city platform. This paper aims to investigate the trends of smart city platforms used in domestic and foreign countries and analyze the technology applied to smart city to study smart city platforms that solve various problems of the city such as environment, energy, safety, traffic, environment.