• Educational Technology International
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• 제15권1호
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• pp.1-26
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• 2014

The purpose of this study was to develop design principles of both animated pedagogical agents as 'credible' persuasive message source and persuasive fear arousing instructional messages in order to help enhance attitude changes toward a certain issue. Based on the previous pedagogical agent research, this study drew the design principles providing ways to manipulate agent credibility level and fear arousing level of message. Consequently, it specified how to make pedagogical agents perceived less or more credible by learners by manipulating a variety of agent features. For fear arousing message, this study showed how fear arousing messages would be structured into one of three levels: non-threatening, moderately threatening, and strongly threatening. Two different agent conditions and three message conditions were actually developed and experimentally tested with the participants of 40 undergraduate students. The results showed that the agent design principles specified from the previous research worked well enough to make a distinction between the more credible agent and the less credible agent. The overall results of this study may indicate that the design strategies for fear arousing message are retained on the premise of some future refinements.

• 정보화정책
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• 제31권2호
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• pp.82-104
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• 2024

사물인터넷(IoT)의 발전으로 이른바 '연결된 생활(Connected Living)'이 가능해지면서 스마트 홈 서비스가 급격한 성장세를 보이고 있다. 그런데 스마트 홈 카메라를 통한 개인정보 유출 피해가 늘어나고 있으나, 사용자들은 걱정을 하면서도 개인정보 보호 행동에는 소극적인 성향을 보이고 있다. 본 연구는 스마트 홈 카메라의 소프트웨어 업데이트 알림 메시지를 어떻게 디자인하는 것이 사용자의 보안행동 준수(업데이트 설치)에 효과적인지를 이론적으로 설명하고 검증하였다. 실제 사용자 120명이 참여한 설문 실험을 통해 확인한 결과, 감정적 소구(공포 유발을 위한 보안침해 경고 이미지), 이성적 소구(업데이트 미설치 시 발생할 수 있는 부정적 결과(영상 유출)를 강조한 손실 프레이밍 메시지))의 효과가 모두 확인되었다. 본 연구의 결과는 스마트 홈 카메라 사용자의 위협 판단(Threat Appraisal) 및 보호 동기(Protection Motivation) 형성에 효과적인 메시지 디자인 특성(Message Design Features)에 대한 이론적 해석을 제공하며, 실무적인 가이드라인 마련에 도움이 될 수 있다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2024년도 춘계학술발표대회
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• pp.175-178
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• 2024

IoT is becoming more and more popular, along with the massive availability of cheap and easy-to-use IoT devices. One protocol that is often used in IoT devices is the Message Queuing Telemetry Transport (MQTT) protocol. By default, the MQTT protocol does not activate encrypted data security features. This MQTT default feature makes the transmitted and received message data vulnerable to attacks, such as eavesdropping. Therefore, this paper will design and implement encrypted data security using the lightweight cryptography algorithm. The focus of this paper will be on securing MQTT message data at the application layer. We propose a method for encrypting specific MQTT message fields while maintaining compatibility with the protocol's functionalities. The paper then analyzes the timing performance of the MQTT-LEA implementation on the Raspberry Pi 3+. Our findings demonstrate the feasibility of using LEA at the application layer to secure MQTT message communication on resource-constrained devices.

• 유공압시스템학회논문집
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• 제8권4호
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• pp.17-23
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• 2011

Proportional control solenoid is a type of modulating valve that can continuously control the valve position with magnetic force of solenoid. Recent microcontroller based digital servocontroller for proportional valve is being developed toward the smart valve with additional features such as enhanced control algorithm for finer process and intelligent on-board diagnosis for maintenance. In this paper, development of servocontroller network control with CAN bus which is free from problems of security and network traffic jam is presented. Design of network control system includes modes of communication between master and slave, assignment of 29bit message identifier and message objects, transaction of communication sequence, etc. Monitoring function and control experiments for remote valve through CAN network prove the extended function of smart valve control system.

• 패션비즈니스
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• 제11권3호
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• pp.133-151
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• 2007

The role of fabric now directly related with the expression of the beauty of clothing and it provides new and creative ideas. This study was aimed at reviewing basic data that can be used in systematic design development through fabric expression for today's fashion designers who must study unique, original fashion design development. For systematic development of design technique through fabric expression, fabric expression methods and characteristics, aesthetic characteristics and fabric design of 'art to wear' were reviewed and the results are as follows. First, the highly wrought fabric expression of art to wear was confirmed to be comprehending a message within itself. Second, aesthetic characteristics of fabric expression used in art to wear can be classified as decorativeness, extensity, 2-D pictorialness, handicraft, compounding and rearrangement, and 3-D characteristics. Third, the 6 aesthetic characteristics have unique design features and aesthetic categories. The understanding the fabric expression techniques through study on the classification of the fabric expression in 'art to wear' is expected to be extended to proposition of creative direction and inspiration of modern fashion.

• 한국정보통신학회논문지
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• 제20권4호
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• pp.747-754
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• 2016

DHCP(Dynamic Host Configuration Protocol)는 IP 주소 관리의 효율성과 편의를 위한 프로토콜이다. DHCP는 네트워크 내 개별 호스트에게 TCP/IP 통신을 실행하기 위해 필요한 IP 주소 및 구성 정보를 자동적으로 할당해준다. 하지만 기존의 DHCP는 서버와 클라이언트 간 상호 인증 체계가 없기 때문에 DHCP spoofing, release 공격과 같은 네트워크 공격에 취약하다. 이러한 문제점을 해결하기 위해 본 논문에서는 다음과 같은 기능을 지원하는 DHCP 프로토콜을 설계하였다. 먼저, ECDH(Elliptic Curve Diffie-Hellman)를 이용하여 세션 키를 생성하고 ECDSA(Elliptic Curve Digital Signature Algorithm)를 사용하여 전자서명을 함으로써 서버와 클라이언트 간 상호 인증을 수행한다. 그리고 메시지에 HMAC(Hash-based Message Authentication Code)을 추가하여 메시지의 무결성을 보장한다. 또한 Nonce를 사용하여 재전송공격을 방지한다. 결과적으로 수신자는 인증되지 않은 호스트로부터 수신한 메시지를 폐기함으로써 네트워크 공격을 막을 수 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.384-389
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• 2005

The objective on this project is to develop a cooperative Field Robot (FR), by using a customize Open Control Platform (OCP) as design and development process. An OCP is a CORBA-based solution for networked control system, which facilitates the transitioning of control designs to embedded targets. In order to achieve the cooperation surveillance system, two FRs are distributed by navigation messages (GPS and sensor data) using CORBA event-channel communication, while graphical information from IR night vision camera is distributed using CORBA Asynchronous Method Invocation (AMI). The QoS features of AMI in the network are to provide the additional delivery method for distributing an IR camera Images will be evaluate in this experiment. In this paper also presents an empirical performance evaluation from the variable chunk sizes were compared with the number of clients and message latency, some of the measurement data's are summarized in the following paragraph. In the AMI buffers size measurement, when the chuck sizes were change, the message latency is significantly change according to it frame size. The smaller frame size between 256 bytes to 512 bytes is more efficient fur the message size below 2Mbytes, but it average performance in the large of message size a bigger frame size is more efficient. For the several destination, the same experiment using 512 bytes to 2 Mbytes frame with 2 to 5 destinations are presented. For the message size bigger than 2Mbytes, the AMI are still able to meet requirement far more than 5 clients simultaneously.

• 복식
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• 제65권6호
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• pp.133-147
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• 2015

The aim of this study is to review the creative fashion installation of Henrik Vibskov, Danish designer. Its intention is to contribute useful information for more innovative fashion presentation. As a research method, document and case study were performed and his collections from 2004 F/W to 2016 S/S were analyzed. In fashion installation, the designer puts objects in meaningful spaces in order to convey a certain message, to make an integrated artwork, and to interact with spectator. It has been used in fashion exhibitions, as well as in the set design of fashion performance and fashion show. The results were as follows. Henrik Vibskov's fashion installation has three features, which are 1)conceptual theme approach that communicates a twisted and metaphoric message, with a poetic and interesting show title, 2) surrealistic scenography that plays with fragmentation of the human body, clustering of plastic and symbolic objects, innovative color transformations, and visual trickery between figures and the background, and 3) setting for multisensory performance that makes spectators interact by making artistic objects and surroundings, which stimulates the five senses. Henrik Vibskov's fashion installation can exist as an independent artwork, and not just as a supporting piece for a fashion show. It has both artistic and fashionable values, and can be an effective fashion presentation communicating his conceptual fashion themes.

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2003년도 춘계학술발표대회논문집
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• pp.455-459
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• 2003

미래의 게임을 발전시킬 가장 큰 원동력의 세 가지 요소는 3차원 그래픽, 네트워크, 가상현실 기술로 집약되는데, 이중 네트워크 기술은 차세대 네트워크 게임의 필수적인 요소기술로서 현재 많이 연구되고 있으며 초고속정보통신망의 확충 및 보급에 따라서 인터넷을 통한 네트워크 게임이 널리 이용되고 있다. 하지만 네트워크 게임의 특성상 다수의 이용자들이 서버에 집중되게 되면 서버의 부하가 걸려 이용자들의 불편함을 초래함은 물론, 서비스 제공자 측면에서도 많은 비용을 들여서 서버를 증설하여야 하는 문제가 발생하게 된다. 이에 본 논문은 클라이언트가 서버에 거의 의존하지 않고 클라이언트간의 정보교류를 통해 네트워크게임을 즐길 수 있는 하이브리드 분산 서버 시스템을 제안하고자 한다 이 시스템은 기존의 서버에 의존하여 메시지를 송·수신하던 방법을 탈피하여 정보갱신 및 저장의 경우에만 서버에 의존하고, 대부분의 메시지 처리는 클라이언트간에서 이루어 질 수 있게 설계하였다. 제안하는 설계 방법은 다음과 같다 첫 번째로 메시지 등급화 처리방법을 제안하여 메시지의 중요성에 따라 서버나 클라이언트가 관리를 할 수 있도록 하였으며, 두 번째로 Client-Server 방식과 Pear-to-Pear 방식을 병행하여 효율성을 꽤하였다. 세 번째로 메시지 등급화에 의한 메시지 큐의 멀티 화 및 보안 부분에서 기타 문제 해결방법을 제안하고자 한다

• 한국실내디자인학회논문집
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• 제22권1호
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• pp.55-63
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• 2013

The main purpose of (the) performing arts is to efficiently communicate the themes and meanings which performances contain under limited time and place to the audience. Stage design should visually express play writer's scripts and director's interpretations of works, amid limitations. Although it is mostly designed metaphorically, in many cases, it is used only as a tool describing the background of performances but fails to effectively convey the true message of scenes to spectators. On the other hand, Bob Crowley has been recognized for his own design presentation skills to win 'Best Scenic Design of a Musical' of Tony Awards for six times and still exerts great influence on the musical and performing arts fields as a set designer. This study analyzes his reading of scripts and visual metaphor expressions, focusing on the musical, 'Aida' where the skills are mostly notable. To that end, we studied the concept of stage arts and theory of visual metaphoric expression to derive the features of his own technique in visual metaphor. Then, the features were applied to each scene of 'Aida' to see how they are displayed on stage. The result shows that Bob Crowley not only describes the background on stage, but also visualizes characters' personality and emotions in scenes. Such method of his expression is a proof to enhanced performance level by maximizing the atmosphere. Considering that a stage design should be based on the capacity of a designer to reinterpret the space with renewed viewpoints, visual metaphoric expression can serve as an effective tool to deliver clear messages to the audience under limited time and space, which is open to various methods of expressions.