• 디지털융복합연구
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• 제10권8호
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• pp.45-52
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• 2012

본 연구는 생산정보시스템에 대한 품질인식이 사용자 성과와 기업성과에 미치는 영향관계를 파악해 보는 것을 주목적으로 하였다. 연구목적의 효과적인 달성을 위하여 관련 선행연구에 관한 고찰결과를 토대로 연구모형과 가설을 수립하였다. 생산정보시스템을 도입 활용 중인 132개 기업을 대상으로 수집된 자료를 이용하여 공분산 구조모델 분석을 통한 연구가설 검정을 수행하였다. 본 연구의 실증분석 결과를 요약해 보면 다음과 같다. 첫째, 생산정보시스템의 생산정보품질과 지원서비스품질은 사용자 만족도에 긍정적인 영향을 미치는 반면 시스템품질은 별다른 영향을 미치지 못하는 것으로 나타났다. 둘째, 생산정보시스템의 품질요인, 즉 생산정보품질, 시스템품질, 지원서비스품질은 모두 시스템 활용도에 긍정적인 영향을 미치는 것으로 밝혀졌다. 셋째, 생산정보시스템에 대한 사용자의 만족도, 시스템 활용도, 성과개선 간에는 모두 긍정적인 관계성이 존재하는 것으로 밝혀졌다. 이상의 분석 결과를 토대로 연구의 시사점과 한계점 및 향후 연구방향을 제시하였다.

• Asia pacific journal of information systems
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• 제9권2호
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• pp.1-17
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• 1999

A feedback echo is a structured restatement of the user's query and informs the user what the system intends to do for the query. This provides backtracking of the user's query so that the user knows how the system has interpreted the query. This study scrutinizes whether the feedback echo, as currently available in the INTELLECT commercial system, can improve the performance of a casual user using a restricted natural language database interface. This study concludes that the particular type of feedback echo available in this commercial system was not effective in terms of overall performance for casual users. It is worth mentioning, however, that the feedback echo was effective for the specific type of error: using wrong conditions for data retrieval.

• Current Optics and Photonics
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• 제1권5호
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• pp.440-455
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• 2017

In this paper, we carry out a performance analysis of a two-user free-space optical (FSO) communication system with photodetector multiplexing, in which the two users are defined as the primary user (PU) and secondary user (SU). Unlike common single-user FSO systems, our photodetector multiplexing FSO system deploys a shared detector at the receiver and enables PU and SU to send their own data synchronously. We conduct the performance analysis of this FSO system for two cases: (1) in the absence of background radiation, and (2) in the presence of background radiation. Decision strategies for PU and SU are presented according to the two scenarios above. Exact and approximate conditional symbol-error probability (SEP) expressions for both PU and SU are derived, in an ideal channel with no fading. Average SEP expressions are also presented in the no-background-radiation scenario. Additionally, in some particular cases where the power ratio tends to 0.5 or 1, approximate SEP expressions are also obtained. Finally, numerical simulations are presented under different conditions, to support the performance analysis.

• 디지털산업정보학회논문지
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• 제5권3호
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• pp.47-57
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• 2009

Computing environments are being more and more various due to the development of technologies. While existing computing environments used for fixed locations or particular purposes by requesting big scale monitors or complicate calculation performance, recent computing environments are used for a variety of locations and for a diversity of purposes by using various devices. Because of the needs, digital device convergence, which emphases portability and mobility, came out. However, almost researches for user interface are performed for big scale monitors or complicate calculation performance until now. By the reason, user interface on each small device is different from others, or is not appropriate for the purpose of small device. Therefore, this research is to design Zoomable User Interface (ZUI) that adapts for small devices by adding the existing user interface on small devices and haptic technologies, and to implement a user interface for PDA devices.

• 한국콘텐츠학회논문지
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• 제15권4호
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• pp.454-468
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• 2015

본 연구는 UTAUT이론을 바탕으로 정보통신 기술수용연구에서 상대적으로 간과되어왔던 다양한 제품특성(제품기능성, 디자인, 사용편의성)이 기능적 동기(노력기대, 성과기대)와 쾌락적 동기(인지된 즐거움)에 미치는 영향과 사용동기가 스마트 디바이스 사용의도에 어떠한 영향을 미치는지 규명하고자 진행되었다. 서울을 포함하여 5대광역시의 스마트 디바이스 사용자 800명을 비례할당방식으로 조사한 결과, 기능적 동기(노력기대, 성과기대)와 쾌락적 동기(인지된 즐거움)는 스마트 디바이스 사용의도에 정(+)의 영향을 미치는 것으로 나타났으며, 스마트 디바이스의 디자인은 인지된 즐거움에, 사용용이성은 노력기대와 성과기대에 각각 정(+)의 영향을 미치는 것으로 나타났다. 그러나 제품기능성은 노력기대와 성과기대에 유의한 영향을 미치지 못하는 것으로 나타났다.

• 한국정보통신학회논문지
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• 제26권9호
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• pp.1367-1373
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• 2022

본 논문에서는 셀프리 다중안테나 네트워크에서 하위 성능 사용자의 주파수 효율을 증대시키기 위한 전력 재할당 기법을 고려한다. AP(Access Point)는 사용자의 대규모 페이딩(large-scale fading) 채널 정보를 이용해 채널 세기에 비례하여 전력을 할당하여 전체 네트워크의 전력효율을 극대화한다. 다음으로 AP는 하위 성능 사용자의 주파수 효율을 증가시키기 위해 할당전력 중 임계비율 이상의 전력을 할당받은 사용자의 전력을 임계비율과 같아지도록 줄이고, 회수한 전력을 채널이 가장 나쁜 사용자에게 추가로 할당한다. 시뮬레이션을 통해 전력 재할당 기법을 통해 증가시킬 수 있는 하위 성능 사용자의 주파수 효율을 정량적으로 검증한다.

• 대한인간공학회지
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• 제16권2호
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• pp.29-38
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• 1997

The research on the factors which effect on legibility is mainly utilized as the basic data of selecting the standard guideline of VDT screen. But the research on Korean is scarcer than that of English. Furthermore, it is unreasonable to apply the results of the foreign language to Korean, beause of the difference between the typography of English and that of Korean. Therefore, more systematic and ergonomic research of the Korean typography on VDT screen is needed. In this paper, an experimental study on search speed and error rate is designed and performed according to different Korean letter size and font on search task with VDT. The experimental screen based on popular Ming and Gothic style is made up of total 12 artificial screens, each 6 different font size. As the criteria of the performance, searching speed(s.s.) and error rate (e) are selected, and CFF value is measured to evaluate user's visual fatigue. The results of experiment in font show that the Korean Gothic style is superior to the Korean Ming style in user's visual performance. The letter size that gives user the optimal performance ranges from the visual angle 39.8' to 55.5' in Ming style, from the visual angle 39.8' to 52.6' in Gothic systle. In visual fatigue experiment, the better performance of letter size is, the less tired user feels. And the smaller letter size is, the more tired user feels. There is no relationship between font and user's visual fatigue.

• 한국정보시스템학회지:정보시스템연구
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• 제15권4호
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• pp.171-188
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• 2006

Information technology and the Internet have had a dramatic effect on education method and individual life. Universities and companies we making large investments in e-Learning applications but are hard to pressed to evaluate the success of their e-Learning systems. e-Learning can be seen as not only one of Internet based information systems which can provide education services but also one of teaching-teaming methods which can implement self-directed teaming. This paper tests the updated model of information system success proposed by Delone and McLean using a field study of a e-Learning. The five dimensions - information quality, system quality, service quality, user satisfaction, net benefit - of the updated model are parsimonious framework for organizing the e-learning success metrics identified in the literature. Questionaires are collected from 107 students who are enrolling a e-learning class using online survey. The model is tested using SPSS and LISREL. The results show that information quality and service quality are significant predictors of user satisfaction with the e-Learning system but system quality is not. Also user satisfaction is found to be a strong predictor of the learning performance. This strong association between user satisfaction and teaming performance suggests that user satisfaction may serve as a valid surrogate for teaming performance. Empirical testing of the updated DeLone & McLean model should therefore be extended to cover a wider variety of systems.

• 간호행정학회지
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• 제17권3호
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• pp.284-292
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• 2011

Purpose: The purpose of this study was to examine the causal relationships among quality of hospital SCM (system quality, information quality, service quality), perceived usefulness, user satisfaction and logistics performance by hospital staff. Methods: A survey using a structured questionnaire was conducted with 276 hospital staff. Analysis of the data was with both SPSS Win 18.0 for descriptive statistics and AMOS 8.0 for the structural equation model. Results: The hypothetical model yielded Chi-square=8.121 (p=.087), df=4, $x^2$/df=2.030. GFI=.989, AGFI=.942, RMSEA=.066, NFI=.995, CFI=.997 TLI=.990 and showed good fit indices. Three dimensions of quality of SCM had significant direct effects on perceived usefulness. System and service of quality of SCM had significant direct effects on user satisfaction. Perceived usefulness had significant direct effects on user satisfaction. User satisfaction had significant direct effects on logistics performance. Conclusion: These results suggest that logistics performance can be enhanced by user satisfaction, user satisfaction can be enhanced by perceived usefulness, and perceived usefulness can be enhanced by quality of hospital SCM. Further study with various hospitals and various variables is necessary.

• 한국항공운항학회지
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• 제26권4호
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• pp.1-12
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• 2018

Baggage Handling System(BHS) is an important element of ground operation services and the importance is further emphasized as air demand increases and passengers change. If there is a problem with departure baggage handling, the aircraft's gate occupancy time will be longer than the initial plan, resulting in congestion of the anchorage leading to final passenger terminal and mooring and road congestion and arrival or It is delayed until the processing of the baggage of the connecting flight and it can cause an economic loss such as confusion in the operation of the airport. The purpose of this study is to investigate the effect of the perception of service quality of BHS users on public Institutions performance through user satisfaction, user performance, and user loyalty. Analysis results using Structural Equation Model was suggested and its implication was discussed in the conclusion.