• International Journal of Contents
• /
• 제10권3호
• /
• pp.64-72
• /
• 2014

This study explored the elements that affect team achievements in virtual environments. In this study, consideration was given to the role of group dynamics in facilitating productive interaction. We aspired to reveal the mechanisms of group dynamics and examined how group dynamics affected team achievements in virtual environments. The empirical study was performed with undergraduate students enrolled in an e-learning course. In collaboration with other majors, students executed team projects and managed project issues in forums or chat rooms. The results of the empirical study indicated that leadership, creative friction, and group cohesion (components of group dynamics) had positive relationships with team achievements. The findings confirmed that addressing creative conflict is a method to improve team performance and that leadership is a key factor in project teams.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
• /
• pp.1437-1440
• /
• 2008

In this paper, we mainly deal with metallic electrode materials and patterning processing of plasma display panels. We focus on the recent development status, where low cost and high performance electrode materials such as Ag-based single-layered bus, low cost-in-use and anti-migration address electrodes are briefly introduced. The technological trends and further works on novel electrode materials and processing are also discussed.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
• /
• pp.1101-1104
• /
• 2008

We have fabricated the transparent TFTs using new oxide material (AZTO: Al-doped zinc tin oxide) as an active layer. The AZTO TFT showed good performance without post-annealing. The electrical characteristics were improved by the post-annealing up to $300^{\circ}C$. The AZTO TFTs exhibited a mobility of $8{\sim}12\;cm^2/Vs$, a sub-threshold swing of 0.2~0.6 V/dec, and an on/off ratio of more than $10^9$.

• 한국콘텐츠학회논문지
• /
• 제21권1호
• /
• pp.243-257
• /
• 2021

본 연구는 팀 리더의 퍼실리테이션 역량과 팀 효과성의 관계에서 공유리더십의 매개효과를 검증하고자 했고, 이를 위해 팀제를 운영하는 조직의 구성원 377명을 대상으로 설문조사를 실시하였다. 수집된 자료는 SPSS 26.0을 이용해 분석하였다. 분석 결과, 첫째, 팀 리더의 퍼실리테이션 역량의 하위요인인 커뮤니케이션 및 참여 분위기 조성은 팀 효과성(팀 성과, 팀 몰입)에 유의한 정(+)의 영향을 미쳤으며, 과업 및 조직화는 팀 몰입에 유의한 정(+)의 영향을 미쳤다. 둘째, 팀 리더의 퍼실리테이션 역량의 커뮤니케이션 및 참여 분위기 조성, 과업 및 조직화 모두 공유 리더십에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 공유리더십은 팀 효과성(팀 성과, 팀 몰입)에 유의한 정(+)의 영향을 미쳤다. 마지막으로 공유리더십은 팀 리더의 퍼실리테이션 역량과 팀 효과성의 관계에서 부분매개효과가 있음이 확인됐다. 본 연구는 팀 리더의 퍼실리테이션 역량과 다른 변인들 간의 관계를 규명함으로써 퍼실리테이션 연구를 이론적으로 확장하고, 현대 조직에서 요구하는 리더와 구성원의 역할과 역량에 대한 방향을 제안하여 실무적 시사점을 제시하였다는 점에서 의의가 있다.

• ETRI Journal
• /
• 제24권1호
• /
• pp.31-42
• /
• 2002

In high-speed multimedia satellite communication systems, it is essential to provide high-quality, economical services by using efficient transmission schemes which can overcome channel impairments appearing in the satellite link. This paper introduces techniques to compensate for rain attenuation and the Doppler shift in the satellite communication link. An adaptive transmission technique with a control algorithm to adaptively allocate transmission schemes is used as a countermeasure to rain attenuation. We introduce a new rain attenuation modeling technique for estimating system performance and propose a novel Doppler shift compensation algorithm with reduced hardware complexity. Extensive simulation results show that the proposed algorithm can provide greatly enhanced performance compared to conventional algorithms. Simulation software and hardware which incorporate the proposed techniques are also demonstrated.

• ETRI Journal
• /
• 제25권3호
• /
• pp.195-202
• /
• 2003

This paper proposes a new LDMOSFET structure with a trenched sinker for high-power RF amplifiers. Using a low-temperature, deep-trench technology, we succeeded in drastically shrinking the sinker area to one-third the size of the conventional diffusion-type structure. The RF performance of the proposed device with a channel width of 5 mm showed a small signal gain of 16.5 dB and a maximum peak power of 32 dBm with a power-added efficiency of 25% at 2 GHz. Furthermore, the trench sinker, which was applied to the guard ring to suppress coupling between inductors, showed an excellent blocking performance below -40 dB at a frequency of up to 20 GHz. These results confirm that the proposed trenched sinker should be an effective technology both as a compact sinker for RF power devices and as a guard ring against coupling.

• 디지털산업정보학회논문지
• /
• 제13권4호
• /
• pp.179-191
• /
• 2017

The purpose of this study is to investigate the change of comprehension degree about learning satisfaction and capstone class by applying the subject which draws idea for team project task in college to creative capstone design program. The Capstone Design Program is designed to train fieldworkers with creative problem solving skills and is widely applied as a problem-solving course in team-based projects. In this paper, based on the case study of the 'fusion capstone design' operated in the first semester of 2015 ~ 2017, the capstone design course was established in the course of designing ideas for problem solving. The results of this study are as follows: First, the questionnaire about capstone design instruction process, instruction method, and learning achievement satisfaction were analyzed. As a result, understanding of capstone design was found to be higher than that of class before class, and satisfaction of performance course, method of teaching performance and learning outcome were obtained.

• 전기학회논문지
• /
• 제62권6호
• /
• pp.886-890
• /
• 2013

Uplift of contact wire and dynamic characteristics between pantograph and contact wire are key interaction performance of OCS (Overhead Catenary System). These two evaluation items are the approval criteria for the performance between OCS and pantograph. A telemetry system or DAQ (Data Acquisition) System based on wireless communication make it monitor a dynamic behavior which is measured directly in a 25 kv like parts. While permissible working time is too short time to install is too long. In this paper, it is described that optimization the telemetry measurement system for OCS and increasing accuracy, easy adaptation, and faster handling can be also achieved through the study.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1999년도 하계학술대회 논문집 A
• /
• pp.271-273
• /
• 1999

In this paper 30 kVA Super-Conducting Generator's test and analysis results of OCC and SCC are presented. Also the test and FE analysis results of the generator under 1.2, 2.4, and 3.6[kW] load are described. For FE analysis of the generator's performance, the external circuit is coupled with the FE region. The generator's end winding reactance is obtained based on the design data, actual dimension, preliminary FE analysis, and empirical formulas. The comparison of FE analysis coupled with external circuit to the test results shows a good agreement.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2004년도 하계학술대회 논문집 B
• /
• pp.1337-1339
• /
• 2004

The existing problems of the Electro-Magnetic Suspension system such as air-gap disturbance, mass variation and actuator/sensor failure are described in amore specific manner. General active filter has a bad influence on suspension stability. Kalman Filter is based on statistical parameter. Thus, in this paper, It is shown that filtering performance of Kalman Filter and Active filter is excellent with simulation and experiment, stability analyze for air-gap disturbance.