• Journal of information and communication convergence engineering
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• 제1권4호
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• pp.213-216
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• 2003

A VPN is widely used in a communications environment which access is controlled to permit peer connections only within a defined community of interest. It is constructed through some form of partitioning of a common underlying communication medium, where this underlying communications medium provides services to the network on a non-exclusive basis. In this paper, we have analyzed a variety of architecture to implement Giga bps VPN system. The proposed architecture will satisfy the needs of clients who adopt Giga bps VPN system in the various environments.

• International Journal of Advanced Culture Technology
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• 제6권4호
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• pp.309-316
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• 2018

The main purpose of this study is to understand how cognitive factors influence the way people interact with information/information systems, by conducting comprehensive and in-depth literature reviews and a theoretical synthesis of related research. Adaptive systems have been built around an individual user's characteristics, such as interests, preferences, knowledge and goals. Individual differences in the ability to use new information and communication technology have been an important issue in all fields. Performance differences in utilizing new information and communication technology are sufficiently predictable that we can begin to coordinate them. Therefore, it is necessary to understand cognitive mechanisms to explain differences between individuals as well as the levels of performance. The theoretical synthesis from this study can be applied to design intelligent (i.e., human friendly) systems in our everyday lives. Further research should explore optimization design for user, by integrating user's individual traits (such as emotion and intent) and system modules to improve the interactions of human-system in data-driven environments.

• 한국융합학회논문지
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• 제6권6호
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• pp.213-219
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• 2015

본 연구는 최근 우리의 소통방식에 큰 변화를 불러일으키고 있는 Social Network Service(SNS) 커뮤니케이션 특성이 교수-학생과의 관계형성(교수신뢰, 장기지향성)에 어떠한 영향을 미치는지 검증하는 연구이다. 연구모형은 커뮤니케이션, SNS, 관계 개발의 기존 연구를 기반으로 작성되었다. 연구를 위해 교수와 SNS를 통해 소통하는 대학생을 대상으로 총 210부의 설문을 배부하여 유효한 195부를 분석하였다. 수집된 자료의 분석은 SmartPLS를 활용하였다. 연구결과 독립변수인 커뮤니케이션의 질, 커뮤니케이션의 빈도, 상호작용성, 개방성은 교수신뢰에 유의한 영향을 미치는 것으로 나타났으며 장기지향성에 영향을 미치는 요인으로는 커뮤니케이션의 질, 커뮤니케이션의 빈도, 개방성이 검증되었으며 상호작용성은 교수신뢰의 매개효과를 통해 장기지향성에 영향을 미치는 것으로 나타났다.

• Journal of information and communication convergence engineering
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• 제5권1호
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• pp.73-77
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• 2007

This paper discusses the implementation of a rehabilitation center based on a ubiquitous sensor network. This paper discusses the implementation of a rehabilitation center based on a ubiquitous sensor network. We recognize that certain mild conditions requiring rehabilitation may be treated with minimal human supervision. In place of this constant human supervision, a variety of sensors are used to monitor the patient and rehabilitation progress. These sensors send data through a wireless Zigbee network to a server which stores the data and makes it available to a rehabilitation expert for analysis. This rehabilitation expert also issues rehabilitation prescriptions which are created based on the expert's determination of the patient's condition. By having the ability to control the rehabilitation equipment used, strictly enforce the assigned prescription, and constantly monitor the patient for any warning signs, the system ensures a safe and optimal rehabilitation session.

• 미래기술융합논문지
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• 제2권1호
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• pp.1-7
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• 2023

최근, 무선 통신 기술을 활용하여 스마트팜 환경을 개선하고자 하는 연구가 지속되고 있다. 본 논문에서는 노지 스마트팜 환경에서 발생하는 문제점에 대해 소개하고, 이들을 해결하기 위한 통신 기술적 고려사항을 다루고자 했다. 노지 스마트팜 환경에 적용하기 위한 후보 기술로 LoRa, Sigfox, NB-IoT, WiFi를 선정했고, 현재 사용되고 있는 국내 스마트팜 기술의 문제점 및 방향성을 기반으로 설치 비용, 통신 범위, 데이터 전송 속도, 배터리 수명, 가격 등을 고려하여 각각의 후보 기술을 분석하여, 최종적으로 LoRa 기술이 가장 적합한 것으로 판단했다. 자세한 기술적 분석을 위해 본 논문에서는 LoRa의 물리 계층과 Medium Access Control (MAC) 계층 기술, 그리고 보안에 대해 소개하였고, 특히 물리 계층의 변조기법, MAC 계층에서의 Class (Class A, B, C) 기반 프로토콜 동작 방법, 그리고 LoRa 버전별 보안 아키텍처에 대해 기술했다.

• Journal of information and communication convergence engineering
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• 제17권1호
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• pp.84-90
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• 2019

Applications of unmanned aerial vehicles (UAVs) in the military environment have become popular because they require minimum human contribution and can avoid accidents during missions. UAVs are employed in various missions such as reconnaissance, observation, aggression, and protection. Consequently, counter-measures, known as anti-drone technologies, have been developed as well. In order to protect against threats from anti-drone technologies and enhance the survivability of UAVs, this study proposes an evasive measure. The proposed bio-inspired evasive maneuver of a UAV mimics a dragonfly's irregular flight. The unpredictable UAV movement is able to confuse enemies and avoid threats, thereby enhancing the UAV's survivability. The proposed system has been implemented on a commercial UAV platform (AR Drone 2.0) and tested in a real environment. The experiment results demonstrate that the proposed flight pattern has larger displacement values compared to a regular flight maneuver, thus making the UAV's position is difficult to predict.

• 한국정보기술학회 영문논문지
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• 제10권2호
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• pp.111-123
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• 2020

The core competencies for the 21st century are creativity, critical thinking, collaboration, and communication. In recent classes where ICT (information, communication, and technology) is grafted, a lot of efforts are also being made to increase such competencies. According to a research work, ICT is most often used as a communication channel between teachers and students or as an online collaboration tool among students. However, ICT has only played a role as a guideline for instruction, but not included in the curriculum until now. The research on methods how to integrate technology into teaching and learning is in full swing due to the development of technology and the advent of Covid-19. In this paper, we propose a technology integration hierarchy model, namely K-TIHM that can be combined with STEAM education. Since only learning environments have been proposed in the existing research for technology-based STEAM education, our model proposes a series of technology integration hierarchy that can be applied by school age along with STEAM. Also, we analyze the differences in among the Korea's ICT education operation guidelines, the Korea's Software education guidelines, and ours. The proposed model can help developing the primary and secondary school curriculum integrated with technology.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2016년도 제54차 하계학술대회논문집 24권2호
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• pp.271-272
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• 2016

Owing to the development of information communication technology(ICT), there are many changes taking place in the agriculture sector. As an example, an effective agricultural activities with ICT have brought an increase in agricultural production. On the other hand, these technology investment activities are very costly. Until recently, the technology development has been made in agricultural technology development perspective. This view, however, has been changed to production increase in accordance with the crop growth conditions. In this paper, we propose a device which can maintain an optimal crop growing environment. It is economic by utilizing the existing facility of farmhouse and can reduce the cost of crop growth environment improvement.

• 방송공학회논문지
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• 제11권1호
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• pp.130-137
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• 2006

본 논문에서는 통신 방송 융합 환경하에서 다양한 이동 통신 단말을 가지고 있는 최종 소비자에게 멀티미디어 콘텐츠를 서비스 ( 간단히, UCA(Ubiquitous Contents Access) 라고 함) 해 주는 기술들을 소개하고 이 기술들이 적용된 서비스 모텔을 제안한다. 또한 제안된 서비스 기술에 대해 소비자 측면에서 보이는 서비스 기술의 상대적 우위성과 유희성을 분석하였다. 이와 같이 소비자 관점에서 바라본 통방 융합 서비스 기술에 대해 소비자 관점의 상대적 우위성 및 유희성을 분석함으로써 제안된 통신 방송 융합 서비스 모델이 소비자가 선호할 수 있는 가치 있는 서비스임을 알 수 있다.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.40-44
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• 2010

opportunistic spectrum access (OSA) allows unlicensed users to share licensed spectrum in space and time with no or little interference to primary users, with bring new research challenges in MAC design. We propose a cognitive MAC protocol using statistical channel information and selecting appropriate idle channel for transmission. The protocol based on the CSMA/CA, exploits statistics of spectrum usage for decision making on channel access. Idle channel availability, spectrum hole sufficiency and available channel condition will be included in algorithm statistical information. The model include the control channel and data channel, the transmitter negotiates with receiver on transmission parameters through control channel, statistical decision results (successful rate of transmission) from exchanged transmission parameters of control channel should pass the threshold and decide the data transmission with spectrum hole on data channel. A dynamical sensing range as a important parameter introduced to maintain the our protocol performance. The proposed protocol's simulation will show that proposed protocol does improve the throughput performance via traditional opportunistic spectrum access MAC protocol.