• Journal of the Korea Society of Computer and Information
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• v.27 no.12
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• pp.231-238
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• 2022

In this paper, among short-range wireless communication technologies such as Beacon, Bluetooth, UWB (Ultra-wideband), ZigBee, NFC (Near Field Communication), Z-Wave, 6LoWPAN (IPv6 over Low power WPAN), D2D (Device to Device), etc., proposed an IoT service platform based on a beacon that can provide indoor positioning. And, a beacon-linked web server was designed by blocking indiscriminate beacon spam signals and applying REST web service technology with flexibility and scalability. Data accessibility between different devices was verified by testing the success rate of data transmission, the success rate of blocking beacon push, the success rate of IoT interlocking processing, the accuracy of location positioning, and the success rate of REST web service-based data processing. Through the designed IoT service platform, various proposals and research on short-distance-based business models and service platforms will be conducted in the future.

• The Monthly Technology and Standards
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• s.110
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• pp.24-28
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• 2011

한국기계전기전자시험연구원(KTC)은 지난해 7월 한국전기전자시험연구원과 한국기기유화시험연구원이 통합되어 출범한 종합시험인증기관이다. 전기 전자, 계량 계측, 에너지 등 산업 전 분야에 걸친 시험인증 인프라 구축을 통해 차세대 주성장 동력산업을 육성, 자원하며 최근에는 신기술 제품 인증정보 보급과 국제인증 네트워크 구축 등에 박차를 가하는 한편 친환경 녹색기술 분야와 스마트 그리드, NFC(Near Field Communication) 등 새로운 사업영역에도 적극 도전하고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.1046-1048
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• 2013

최근 원전 사고가 다양한 방향으로 발생되고 있고, 또한 원자력 부품 관리는 그 어느 때 보다 중요한 관심사이다. 원전의 작은 부품 하나로 문제가 발생할 경우 치명적인 결과가 나타날 수 있다. 이러한 관점에서 본 연구는 원전 부품에 대해 기존의 NFC(Near Field Communication) 태그 정보를 기반으로 전체 공정에 대해 클라우드 기반의 관리 방법에 대해 연구하였다. 클라우드 기반을 활용한 것은 원전제품의 안전성을 좀 더 확보하기 위한 방법으로 고려하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.405-408
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• 2014

오늘날 사람들은 편리함을 추구함으로써 대부분의 현관문에는 전자식 도어락이 설치되고 있다. 여기에는 전자키 시스템, 기계식 조합키등 다양한 방식으로 개인을 인증한다. 이러한 방식들은 사용자가 직접 도어락을 제어해야 한다는 불편한 점이 있고 오래 사용하다 보면 자주 사용한 버튼이 고장이 나거나 사용 흔적이 남아 보안에 취약하다는 문제점이 있다. 본 논문에서는 기존의 도어락 시스템에 불편함과 문제점을 해결하기 위해 안드로이드 기반의 스마트폰과 아두이노 모듈을 활용하여 NFC 및 개인 스마트폰 인증 방식으로 원격 도어락 시스템을 구현한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.6
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• pp.652-658
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• 2019

When IoT is applied to various research experiment fields such as physics, pharmacy, biology and medicine, it can increase the safety and convenience of researchers by intelligently monitoring and controlling research equipment and environment with various sensors and devices. For accurate and convenient record management and the research history and the basis but also for the reverse tracking, real-time reagent measurement and registration should be provided as a research support automation services. Currently, existing methods of reagent management are operated by computerized method, but reagent registration and management are not automated. And also record is managed manually, there are many hassles and problems such as a record error and too much time required for quantification and registration for many reagents. In this paper, we study a real time reagent measuring and registration method based on IoT to resolve the problems aforementioned, by the information of the reagent acquired by image recognition and NFC method.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.9 no.6
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• pp.578-583
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• 2016

In this paper, we propose a multi-mode wireless power transfer (WPT) system with a dual loop structure. The proposed multi-mode WPT system consist of outer loop module which can operate at two different frequency bands including 6.78 MHz magnetic resonance WPT mode and 13.56 MHz near field communication (NFC) mode and inner loop module connected with outer loop which can operate at two different frequency bands including WPC mode and PMA mode based on inductive coupling standards. In order to be able to embed this system into smartphone battery back cover, the electrical designs are optimized and then the size was fixed $45{\times}90{\times}0.35mm3$ (including ferrite sheet) which is the same commercial smartphone. The proposed multi-mode WPT module can cover WPC and PMA mode based on inductive coupling. Moreover, it has more than 20 dB return loss characteristics at two different frequency bands including 6.78 MHz and 13.56 MHz, and shows more than 70 % transfer efficiency between resonant coils at 6.78 MHz in magnetic resonant charging environment.

• Science of Emotion and Sensibility
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• v.23 no.2
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• pp.51-60
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• 2020

This study aimed to develop a modular smart clothing system for heart rate monitoring that reduces the inconvenience caused by battery charging and the large size of measurement devices. The heart rate monitoring system was modularized into a temporary device and a continuous device to enable heart rate monitoring depending on the requirement. The temporary device with near-field communication (NFC) and heart rate sensors was developed as a clothing attachment type that enables heart rate monitoring via smart phone tagging when required. The continuous device is based on Bluetooth Low Energy (BLE) communication and batteries and was developed to enable continuous heart rate measurement via a direct connection to the temporary device. Furthermore, the temporary device was configured to connect with a textile electrode made of a silver-based knitted fabric designed to be located below the pectoralis major muscle for heart rate measurement. Considering the user-experience factors, key functions, and the ease of use, we developed an application to automatically log through smart phone tagging to improve usability. To evaluate the accuracy of the heart rate measurement, we recorded the heart rate of 10 healthy male subjects with a modular smart clothing system and compared the results with the heart rate values measured by the Polar RS800. Consequently, the average heart rate value measured by the temporary system was 85.37, while that measured by the reference device was 87.03, corresponding to an accuracy of 96.73%. No significant difference was found in comparison with the reference device (T value = -1.892, p = .091). Similarly, the average heart rate measured by the continuous system was 86.00, while that measured by the reference device was 86.97, corresponding to an accuracy of 97.16%. No significant difference was found in terms of the heart rate value between the two signals (T value = 1.089, p = .304). The significance of this study is to develop and validate a modular clothing system that can measure heart rates according to the purpose of the user. The developed modular smart clothing system for heart rate monitoring enables dual product planning by reducing the price increase due to unnecessary functions.

• Information Systems Review
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• v.14 no.1
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• pp.37-65
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• 2012

This research aims to design and analyze a ubiquitous customer relationship management system based on near field communication which can be applied to stores in off-line environment. The existing customer relationship management system has been used mainly for stores in off-line environment to issue a royalty card, to stamp a seal on the purchase goods, and to manage the history of customers' visits and purchases. But, the existing system has two weaknesses; it makes difficult for a store manger not only to acquire a wealth of customer data but also to systematically manage the acquired data. In particular, the effectiveness and efficiency of the royalty card are questioned when a customer makes purchases in the store in that the customer frequently does not carry it or loses it. So, this research suggests a ubiquitous customer relationship management system where a tag for near field communications is attached to a store in off-line environment; a store manager can collect and manage easily customer's dada and customers can seamlessly acquire store's information. To do this, this research conducts the followings. First, we review the previous researches of customer relationship management to examine the concept of ubiquitous customer relationship management. Second, from the examination, we draw the factors to be considered in ubiquitous customer relationship management system based on near field communication. Third, we propose a scenario where the suggested system is used. Fourth, we analyze the participants' values and the process that will be used for the suggested system. Finally, we discuss the possibility of the application of this system to real business environment from various viewpoints.

• Journal of Information Technology Services
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• v.10 no.2
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• pp.189-202
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• 2011

It is important issue how to evaluate the economic feasibility of computing factors in the real world when we build ubiquitous spaces. In this paper, we propose a simple model that can evaluate the economic feasibility of mobile RFID-based ubiquitous computing system which enables seamless communication between offline and online via embedded computing factors in the real world. To achieve this, we explore the meaning of mobile RFID system, the difference between our research and extant researches concerning the evaluation of economic feasibility in RFID system, and propose the so-called 'Tag-based Evaluation Model' (TEM) which is an evaluation model to access the economic feasibility of mobile RFID systems. We also analyze the TEM via simulation cases based on proposed model and discuss the future of TEM.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.60-61
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• 2018

본 연구는 일반적으로 인간이 듣지 못하는 비가청주파수 통신에 대해 분석한다. 대표적인 무선 통신방식으로는 NFC(Near Field Communication), Bluetooth, Wi-Fi 기술 등이 있다. 하지만 이 통신방식들은 통신 모듈이 따로 필요하다는 단점이 있다. 이러한 단점을 보완하기 위해, 본 연구에서는 마이크 및 스피커가 기본적으로 탑재된 스마트폰을 기반으로 한 비가청주파수 통신을 제안한다. 더 나아가 주파수 제어 코드를 최적화하여 비가청주파수를 이용한 통신 거리를 기존의 기술보다 확장하고 높은 인식률을 가지는 것을 목표로 한다.