• Information Systems Review
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• v.6 no.2
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• pp.269-284
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• 2004

Induced from government policy to boost regional economic competitiveness, regional informatization forming e-community has been the subject included in the various regional informatization master plans in Korea. However, few cases are reported for its successful implementation mainly due to the lack of profitable business model to encourage investment. On the other hand, most efforts to build smart apartments, part of the home networking in a broad sense, has been pursued from the different directions. Telecommunication giant such as Korea Telecom tries to find new source of revenue exploiting enhanced broad band technology. Also, construction companies started constructing housing complexes equipped with built-in high speed network infrastructure as a means to differentiation to other competitors. The contents providing community portal has become mandatory in the sense of bearing the cost from customer side who are willing to adopt those services for new smart house. Our research motivation stems from exploring critical value aspects of realizing the profitability of this emerging new business model, that is, industry convergence model. In this paper, mainly from the survey results of the Korean smart apartment complexes, we reported recent home networking services development in Korea, and value propositions from the business model perspective. Merged business model components of telecommunications, construction, and internet contents are analyzed to provide the insights for future directions.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.7
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• pp.613-619
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• 2015

In this paper, we proposed a paper-based pattern-switchable antenna using inkjet-printing technology. The proposed antenna is composed of two bow-tie antennas and a switching network. The bow-tie antennas are inkjet-printed on paper using a low cost home printer. The switching network is built on a printed-circuit-board(PCB) and consists of a single-pole-double-throw(SPDT) switch and balun element. A double-sided parallel-strip line(DSPSL) can convert the unbalanced microstrip mode to the balanced strip mode. Two bow-tie antennas have different radiation patterns because of the different orientation of the reflectors. It is demonstrated from EM simulation and measurement that the radiation patterns of the proposed antenna are successfully switched by the SPDT.

• The KIPS Transactions:PartC
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• v.16C no.1
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• pp.117-124
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• 2009

Recently, the application of network technology extends to all areas because of development of digital information technology. Thus, networks are being evolved towards a next-generation communication environments where all information devices, home appliances, and object are connected and interoperated. In order to provide adequate convergence services in IMS-based networks that are the core technology of the next-generation communication environments, seamless service should be possible although the underlying network and the device in use may change in the networks. In this paper, we propose an efficient architecture, algorithm, and protocol of service session control for seamless service in such networks.

• International Journal of Computer Science & Network Security
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• v.21 no.2
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• pp.110-119
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• 2021

The Coronavirus or COVID-19 is contagiousness virus that infected almost every single part of the world. This pandemic forced a major country did lockdown and stay at a home policy to reduce virus spread and the number of victims. Interactions between humans and robots form a popular subject of research worldwide. In medical robotics, the primary challenge is to implement natural interactions between robots and human users. Human communication consists of dynamic processes that involve joint attention and attracting each other. Coordinated care involves sharing among agents of behaviours, events, interests, and contexts in the world from time to time. The robotics arm is an expensive and complicated system because robot simulators are widely used instead of for rehabilitation purposes in medicine. Interaction in natural ways is necessary for disabled persons to work with the robot simulator. This article proposes a low-cost rehabilitation system by building an arm gesture tracking system based on a depth camera that can capture and interpret human gestures and use them as interactive commands for a robot simulator to perform specific tasks on the 3D block. The results show that the proposed system can help patients control the rotation and movement of the 3D arm using their hands. The pilot testing with healthy subjects yielded encouraging results. They could synchronize their actions with a 3D robotic arm to perform several repetitive tasks and exerting 19920 J of energy (kg.m².S^-2). The average of consumed energy mentioned before is in medium scale. Therefore, we relate this energy with rehabilitation performance as an initial stage and can be improved further with extra repetitive exercise to speed up the recovery process.

• Journal of the Korea Convergence Society
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• v.6 no.4
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• pp.133-138
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• 2015

The basic idea of IoT(Internet of Things) is interconnection and cooperation with a variety of things in real life such as Radio-Frequency Identification(RFID) tags, sensors, mobile phone, etc, through internet. IoT technologies which applied to these fields consist of sensor network technology and middleware, application. Currently, IoT technology is applied to various fields such as health care, home care, automotive, transportation, construction, agriculture, environment, food, and etc, based on its technologies. This paper focuses on discussion of the game planning method in IoT environment. In order to achieve this purpose, first, introduce the IoT technologies. Second, propose a game design elements and considerations in IoT environments. It can help for game developers by using IoT technologies.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.50-51
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• 2013

본 논문에서는 다양한 환경에서 사용자의 각기 다른 사용 상황을 인지하고 그에 맞는 콘텐츠 및 사용자 인터페이스를 실시간으로 구성하여 제공하는 방법에 대해 제안한다. 방송/통신 환경에서도 다양한 사용자가 다매체, 다채널 등 여러 방법으로 컨텐츠를 소비 하고 있기에 단말 환경 및 사용자 특성을 인지하여 그에 적응적인 콘텐츠와 사용자 인터페이스를 제공하는 사용자 반응형 서비스에 대한 논의가 계속 되고 있다. 또한 다양한 디바이스가 보편적으로 보급됨에 따라 사용자는 하나의 스크린에 모든 관심을 주는 것이 아니라 다양한 스크린으로 동시에 관심을 분산시킨다. 그 동안 사용자가 선호하는 콘텐츠가 제공될 경우 더욱 그 주목도를 높이기에 다양한 세컨 디바이스에 개인 적응적 사용자 인터페이스 및 컨텐츠를 제공하는 것이 서비스 차별화의 중요한 요소로 작용하고 있다. 제안하는 프레임워크는 다양한 세컨 디바이스 사용자가 IPTV 와 같은 VOD 서비스를 동시에 이용할 경우 개인화 디바이스를 통해 각자의 서로 다른 환경에 적응적인 부가 서비스를 제공 받는 서비스에 적용하여 테스트를 진행하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.385-388
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• 2010

A place for the blind people movement restrictions in place on a relatively equal opportunity of education can not be provided. In this paper, blind people, as well as web access to information on the catch of the blind people and their preference for acquiring information on how to analyze the survey and analyze national and international stories. targeting the blind people Internet using Web Services in a high-speed network system design, training and support services, analyze and exchange information in real-time training program to develop a community, remote from the home education support system to revitalize blind people and would like to contribute to the information service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.8
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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.

• Journal of Korea Multimedia Society
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• v.19 no.2
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• pp.405-410
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• 2016

Elevator industry is a field that is mechanical, electrical and electronic technology and constantly requires inspection and maintenance considering various applications and various types. Recently, various elevator control and monitoring technologies with IT are developing for elevators on land. But technologies with IT have been hardly done in marine elevator that is consistently assured safety and reliability of life cycle for its parts in poor environment. In this paper, we implemented embedded main controller, floor controller and car controller that meet the requirements and use NMEA network protocol by analyzing home and abroad integrated elevator operation and management systems. Especially, we secured reliability of maintenance by real-time fault diagnosis and control that was implemented with limit switch, gyro sensor, temperature/humidity/barometric pressure sensor and fire detection sensor thinking over the environmental conditions of terrestrial and marine elevator.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.01a
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• pp.265-268
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• 2013

홈 네트워크 산업은 인간의 욕구와 맞물려 앞으로의 발전 가능성이 큰 분야이다. 미 가전협회의 조사에 따르면 소비자들도 홈 네트워크 시스템에 많은 관심을 가지고 있고, 애널리스트 샘 루세노는 "홈 오토메이션 시장은 해를 거듭할수록 규모가 커질 것이다."라고 예상하고 있다. 최근 네트워크 기술은 유선에서 무선으로 발전되고 있으며 홈 네트워크 서비스에는 유선보다 무선 네트워크 기술이 많이 쓰이고 있다. 본 논문에서는 각종 무선 네트워크 통신 기술에 대해 비교분석하고 홈 네트워크 서비스와의 연관성을 살펴보기 위하여 현재 홈 네트워크 서비스에 널리 사용되고 있는 무선 네트워킹 기술인 IEEE 802.11 무선랜 그룹과, IEEE 802.14.1의 블루투스 및 IEEE 802.14.5에 정의된 지그비 통신 기술에 대한 비교분석 한다.