• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.381-382
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• 2013

본 논문에서는 iOS 플랫폼을 위한 스마트 가상기계(Smart Virtual Machine)를 설계하고 구현하였다. iOS 플랫폼을 위한 스마트 가상기계는 가상기계 기반의 컴파일러가 C/C++나 Java 언어로 작성된 프로그램과 의미적으로 동등한 중간 코드를 생성하면 이를 입력으로 받아 실행시켜주는 프로그램이다. 스마트 가상기계는 실행 파일인 SEF(Smart Executable Format) 파일을 입력으로 받아 실행하며, SEF 로더와 인터프리터, 내장 라이브러리, 실행 환경으로 구성되어 있다. 스마트 가상기계는 스마트 기기 등에 탑재되어 하드웨어 독립적으로 실행되며 어플리케이션 형태로 실행이 가능하므로 플랫폼에 독립적인 장점을 가진다. 또한, 프로그래머는 개발 언어의 제약 없이 프로그램을 작성할 수 있고, 프로그램을 플랫폼 독립적으로 실행할 수 있다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.6
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• pp.7-12
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• 2022

This paper introduces the implementation of the AWS IoT service and MQTT based smart home system. The smart home system implemented in this study can monitor temperature and humidity, and can manually adjust the air conditioner heating, and can check the visitors with the camera and remotely control the door lock. The implemented smart home system controls door locks, heating and air conditioners using Arduino, and manages the collected data and control information using the AWS IoT service. In this study, the Android app has been developed to allow users to control IoT devices remotely, and the MQTT protocol was used for data communication and control between the app and the AWS IoT server and Arduino. The implemented smart home system has been implemented based on AWS IoT service, which has scalability to add sensors and devices.

• Bulletin of the Society of Naval Architects of Korea
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• v.50 no.2
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• pp.5-11
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• 2013

• Journal of the Korean Geosynthetics Society
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• v.18 no.4
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• pp.129-138
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• 2019

In this study, the rebar rock bolt sensor and GFRP rock bolt sensor, which can be monitored, were embedded in a large model slope, and the behavior of slopes occurred in the early stage of slope collapse was analyzed after performing the field failure test, numerical analysis of the individual element method and finite element method. By comparing and analyzing the field test and numerical analysis results, field applicability of rock slope collapse monitoring on the rebar rock bolt sensor and GFRP rock bolt sensor was investigated. Through this study, smart slope collapse prediction and warning system was developed, which can be used to induce effective evacuation of residents living in the collapsible area by detecting landslide and ground decay precursor information in advance.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.7
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• pp.1038-1043
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• 2021

Guaranteed seafarer wage payment is essential to ensure a stable supply of seafarers. However, disputes over non-payment of wages to seafarers often occur. In this study, an automatic wage payment system was designed using a blockchain-based smart contract to resolve the problem of seafarers' wage arrears. The designed system consists of an information register, a matching processing unit, a review rating management unit, and wage remittance before deploying smart contracts. The matching process was designed to send an automatic notification to seafarers and shipowners if the sum of the weight of the four variables, namely wages, ship type/fishery, position, and license, exceeded a pre-defined threshold. In addition, a review rating management system, based on a combination of mean and median, was presented to serve as a medium to mutually fulfill the normal working conditions. The smart contract automatically fulfills the labor contract between the parties without an intermediary. This system will naturally resolve problems such as fraudulent advance payment to seafarers, embezzlement by unregistered employment agencies, overdue wages, and forgery of seafarers' books. If this system design is commercialized and institutionally activated, it is expected that stable wages will be guaranteed to seafarers, and in turn, the difficulties in human resources supply will be solved. We plan to test it in a local environment for further developing this system.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.535_536
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• 2009

에너지 관련 자원 가격의 급등으로 전력 생산 비용이 증가하여 세계 여러 나라의 전력 회사들이 재정적인 어려움에 직면하고 있다. 이러한 전력 생산 비용과 판매가격의 왜곡을 해결하기 위한 방법으로 여러 방법이 모색되고 있다. 제안된 여러 방법 중 스마트 미터링 시스템은 에너지 소비자의 에너지 소비 패턴을 변화시키고 자율적인 에너지 절감을 유도하는 효과가 있는 것으로 알려져 있다. 세계 여러 나라에서 이 시스템 도입을 검토하고 있으며 우리나라에서도 이 시스템의 보급을 위해 2008년 실효성 검증을 위한 실증 연구 과제를 추진하였다. 본 논문에서는 2008년 수행한 스마트 미터링 시스템 실증 과제에서 개발된 한국형 스마트 미터링 시스템을 소개하고 실증을 통해 에너지 정보 표시 장치의 에너지 절감 효과를 검증한다. 실증 연구는 2008년 12월부터 2009년 2월까지 약 2개월동안 청주와 서울에서 77가구를 대상으로 수행되었다. 본 논문에는 실증을 통해 얻어진 에너지 절감 효과와 참가자들을 대상으로 한 설문 조사의 결과에 대해 소개한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.10
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• pp.421-432
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• 2020

This study was designed to determine the Internet game and smartphone usage status of senior elementary school students. Data were collected from 6 October 2018 to 30 September 2019, and 1618 subjects were analyzed using SPSS 18.0. As a result of the study, the I-GUESS rating was 6.1% in the high-risk group, and, the S-scale ratios were 10.1% for the potential-risk group and 0.8% for the high-risk group. Physical problems related to Internet games and using smartphones were experienced by 36.0% of the students, with eye fatigue being the highest at 20.4%. Emotional problems were found in 18.5% of the students, with anger being the highest at 6.8%. Social problems were experienced by 21.8% of the students, conflicts with parents being the highest at 10.3%. As a result of surveying the main content based on S-scale and I-GUESS, it was found that the higher the S-scale ratio and the I-GUESS rating, the more broadcast content was used. The correlation between I-GUESS rating and S-scale ratio showed that the higher the I-GUESS rating, the higher the S-scale ratio, and the higher the S-scale ratio, the higher the I-GUESS rating. Future research is necessary to develop an intervention program for elementary school students from a preventive perspective.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.11
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• pp.2413-2418
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• 2010

We propose a retouching method that converts a photography taken by smartphone to a watercolor painting image using bilateral filtering and mean shift segmentation which are mostly used in image processing. The first step is to convert an input image to fit the screen resolution of smartphone. And next step is to weaken high frequency components of the image, while preserving the edge of image using the bilateral filtering. And after that we perform mean shift segmentation from the bilateral filtered image. We apply parameters of mean shift segmentation considering the processing speed of smartphone. Experimental result shows that our method can be applied to various types of image and bring better result.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.206-208
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• 2010

We propose a retouching method that converts a photography taken by smartphone to a watercolor painting image using bilateral filtering and mean shift segmentation which are mostly used in image processing. The first step is to convert an input image to fit the screen resolution of smartphone. And next step is to weaken high frequency components of the image, while preserving the edge of image using the bilateral filtering. And after that we perform mean shift segmentation from the bilateral filtered image. We apply parameters of mean shift segmentation considering the processing speed of smartphone. Experimental result shows that our method can be applied to various types of image and bring better result.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.5
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• pp.267-274
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• 2018

This paper introduces a smart door system composed of security system and secretary system. As ratio of single households increase, the security of household became more important. Also already there were a lot of artificial intelligence secretary system based on voice called smart home technology. But It has limits. It can not work without user's requests. That mean it is not automatic. And the voice recognition depend on user's pronounce. Thus in this paper, we design and develop smart door system that is added function of security and secretary. That can inform users that there are outsider in front of their house in real time. Also that can speak information such as user's requirements, delivery and weather information using TTS. As a result they can prevent crimes and use convenient secretary system.