• Journal of Information Technology Applications and Management
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• 제11권4호
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• pp.1-23
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• 2004

This study identifies communication patterns of groups using synchronous text communication medium for their group decision-making, and examines how these patterns are associated with creative solutions to problems. Our research suggests that certain communication behavior of groups, when appropriately organized, can be of help in enhancing creative production of outcomes. A qualitative study was conducted on communication patterns based on an analysis of text-based electronic conversation protocols. Specifically this research tried to overcome existing studies on electronic groups by focusing on interactive process of communication among participants. The major study conclusion; are: (1) The production of creative outcome may depend on the process or sequence of discussion among group members with synchronous text communication medium. That is, proper interactive responses and appropriate control of the discussion process are essential to obtain a high level of performance. (2) It is importantto make discuss rules based on meta-cognitive and interactive protocols in the early stage. Explicit rules relating to internal group processes as well as communication medium use are even more important to groups with electronic communication medium than face-to-face groups.

• 반도체디스플레이기술학회지
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• 제10권4호
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• pp.7-13
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• 2011

In this paper, the IC(Integrated Circuit) for multi-channel synchronous communication was designed by using FPGA and VHDL language. The existing chips for synchronous communication that has been used commercially are composed for one to two channels. Therefore, when communication system with three channels or more is made, the cost becomes high and it becomes complicated for communication system to be realized and also has very little buffer, load that is placed into Microprocessor increases heavily in case of high speed communication or transmission of high-capacity data. The designed IC was improved the function and performance of communication system and reduced costs by designing 8 synchronous communication channels with only one IC, and it has the size of transmitter/receiver buffer with 1024 bytes respectively and consequently high speed communication became possible. It was designed with a communication signal of a form various encoding. To detect errors of communications, the CRC-ITU-T logic and channel MUX logic was designed with hardware logics so that the malfunction can be prevented and errors can be detected more easily and input/output port regarding each communication channel can be used flexibly and consequently the reliability of system was improved. In order to show the performance of designed IC, the test was conducted successfully in Quartus simulation and experiment and the excellence was compared with the 85C3016VSC of ZILOG company that are used widely as chips for synchronous communication.

• 반도체디스플레이기술학회지
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• 제10권3호
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• pp.1-6
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• 2011

In this paper, the IC(Integrated Circuit) for multi-channel synchronous communication was designed by using FPGA and VHDL language. The existing chips for synchronous communication that has been used commercially are composed for one to two channels. Therefore, when communication system with three channels or more is made, the cost becomes high and it becomes complicated for communication system to be realized and also has very little buffer, load that is placed into Microprocessor increases heavily in case of high speed communication or transmission of high-capacity data. The designed IC was improved the function and performance of communication system and reduced costs by designing 8 synchronous communication channels with only one IC, and it has the size of transmitter/receiver buffer with 1024 bytes respectively and consequently high speed communication became possible. It was designed with a communication signal of a form various encoding. To detect errors of communications, the CRC-ITU-T logic and channel MUX logic was designed with hardware logics so that the malfunction can be prevented and errors can be detected more easily and input/output port regarding each communication channel can be used flexibly and consequently the reliability of system was improved. In order to show the performance of designed IC, the test was conducted successfully in Quartus simulation and experiment and the excellence was compared with the 85C3016VSC of ZILOG company that are used widely as chips for synchronous communication.

• 센서학회지
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• 제22권6호
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• pp.421-427
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• 2013

In this paper, we introduce a new synchronous visible light communication system in which the synchronizing pulse and the data bits are simultaneously transmitted using a 3-level light signal. In the transmitter, the synchronizing pulse and the data bits modulate independently two identical visible LEDs, whose output lights add in free space, make 3-level optical signal. In the receiver, a photodiode detects the light and generates a 3-level output voltage, whose positive and negative part correspond to the synchronizing pulse and the data bits, respectively. The two signals are easily separated and recovered by a simple diode circuit. This configuration provides two independent VLC channels without any multiplexing technique, simplifies the circuit design and construction of synchronous VLC systems.

• Educational Technology International
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• 제10권2호
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• pp.107-125
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• 2009

This study seeks to prove three points through the research. The first point is to examine the changes of international attitudes with actual experiences using synchronous international distance learning. The second point is to examine the effectiveness of a synchronous international distance system. And the final point is to compare international attitudes among middle school and undergraduate school students in Korea and Japan. The study used the DVTS for audio and video communication tools and automatic translating chat as a text communication tool. This combination of communication tools was very effective for students from both countries to communicate for international collaborative learning activities. The study found several interesting patterns of attitude change from the results of the study. For whole category analysis, there are positive changes in four categories of international attitudes: consciousness to foreign countries, consideration for other's viewpoints, motivation for international education, and recognition for the counterpart country. However, there was no change in the nationality category.

• 한국콘텐츠학회논문지
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• 제21권8호
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• pp.20-31
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• 2021

COVID-19로 인한 비대면 문화의 확산은 언택트 서비스 혁신과 화상회의 플랫폼을 통한 비대면 커뮤니케이션 확대로 이어졌다. 그러나 실시간 온라인 커뮤니케이션에서는 비언어적 표현을 확인하는 것이 어려워졌고, 특히나 눈 맞춤을 통한 상호작용은 불가능한 상황이다. 감정을 공유하고 친밀감을 쌓는데 도움을 주는 등 눈 맞춤의 긍정적인 효과가 있음에도 불구하고 실시간 온라인 커뮤니케이션에서 눈 맞춤의 효과를 실증적으로 검증한 연구는 전무한 실정이다. 이에 이 연구는 실시간 온라인 커뮤니케이션에서 눈 맞춤의 효과를 검증하고자 하였다. 커뮤니케이션의 맥락과 눈 맞춤 유무에 따라 6가지 영상 처치물을 사용하여 지속 사용 의도, 성과 기대, 상호작용성, 개인적 유대감을 측정하였다. 연구결과, 모든 맥락에서 눈 맞춤이 없을 때보다 눈 맞춤이 있을 때 모든 측정 변인에서 높게 평가되었다. 이 연구는 실시간 온라인 커뮤니케이션에서 눈 맞춤의 효과를 실험을 통해 검증하고 기술의 필요성과 발전 방향을 제안하여 실시간 온라인 커뮤니케이션에서 더 나은 사용자 경험을 제공하는데 기여할 것이다.

• Journal of information and communication convergence engineering
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• 제8권4호
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• pp.421-426
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• 2010

This paper presents a method of design the counter using sequential system based on synchronous techniques. For the design the counter, first of all, we derive switching algebras and their operations. Also, we obtain the next-state functions, flip-flop excitations and their input functions from the flip-flop. Then, we propose the algorithm which is a method of implementation of the synchronous sequential digital logic circuits. Finally, we apply proposed the sequential logic based on synchronous techniques to counter.

• 정보교육학회논문지
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• 제16권1호
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• pp.107-121
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• 2012

본 연구는 상호작용을 구조화하고 의사소통을 촉진하기 위한 토론 전략의 하나로 육색사고모자 기법을 적용한 온라인 실시간 토론 도구를 개발하고 수업에 적용하여 그 타당성을 확인하고 개선방안을 도출하는 것을 목적으로 한다. 육색사고모자 온라인 실시간 토론 도구를 개발하기 위하여 온라인 실시간 토론과 육색사고모자 기법에 대한 선행연구를 고찰하고 3C 모델의 의사소통, 조율, 협력의 개념에 따라 설계 전략을 수립하였다. 설계 전략에 의거하여 개발된 온라인 실시간 토론 도구는 베타테스트를 거쳐 A 대학교 컴퓨터응용과학부 '컴퓨터기초' 교과목에서 팀 과제를 수행하는데 5주간 4회의 토론에 적용하였다. 학생 대상의 자유기술형 설문, 학생들의 성찰일기, 연구자들의 현장노트를 통해 수집된 질적 데이터를 분석한 결과, 본 연구에서 개발된 육색사고모자 온라인 실시간 토론 도구가 의사소통, 조율, 협력의 측면에서 학생들의 토론을 효율적으로 지원할 수 있음을 확인할 수 있었다. 그러나 문자 기반 의사소통의 한계를 극복하고 육색사고모자 온라인 실시간 토론 도구를 구조화된 상호작용과 의사소통을 촉진하기 위한 도구로 활용하기 위해서는 개선이 필요한 것으로 나타났다.

• 한국전자파학회논문지
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• 제7권4호
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• pp.336-345
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• 1996

SO(synchronous oscillator)는 외부 인가 신호가 없을시에도 발진하는 자려발진기이며 펄스파, 정현파, 비주기적인파 등 어떠한 외부 신호에도 즉시 동기 발진하고, 출력은 일정한 동조대역폭으로 동기한다. 이러한 특성은 SO가 분주 및 체배기로 사용 가능함을 의미하며, 코히런트 디지혈 통신의 동기 문제점을 해결할 수 있을 것이며, 또 이와 같은 특성을 이용하여 DS/SS 동기적용을 위한 SO의 동기 특성을 실험을 통하여 입증하였다.

• 한국전자통신학회논문지
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• 제13권2호
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• pp.349-356
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• 2018

본 연구에서는 무인선, 어군탐지선 등의 듀얼 전기추진시스템에서 두 프로펠러 간에 발생되는 속도 차, 즉 동기오차를 억제하기 위한 동기제어시스템이 설계된다. 이 제어시스템은 각 추진시스템에 대한 예비필터와 속도제어기 그리고 추진시스템 간에 교차 결합된 동기제어기로 구성된다. 예비필터와 속도제어기는 추진시스템이 오버슈트와 입력포화 없이 속도지령을 추종하도록 설계된다. 그리고 동기제어기는 비대칭 외란과 동특성 불일치가 동기오차에 미치는 영향을 분석한 후, 동기제어시스템의 감쇠성과 속응성을 고려하여 설계된다. 끝으로, 시뮬레이션을 통해 설계된 제어시스템이 동기오차의 제거에 효과적임을 보여준다.