• Journal of information and communication convergence engineering
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• 제14권4호
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• pp.227-232
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• 2016

In this study, the performance of a 32-quadrature amplitude position modulation (QAPM) system is analyzed under a Rician fading channel condition when the maximal ratio combining (MRC) diversity technique is used in the receiver. The fading channel is modeled as a frequency non-selective slow Rician fading channel corrupted by additive white Gaussian noise (AWGN). QAPM is available to improve BER performance without amplifying transmit power, and MRC diversity makes the performance improvement of QAPM system even bigger by intentionally maximizing SNR. Error performances are shown for the 32-QAPM system and a 32-phase silence shift keying (PSSK) system in order to examine the effects of fading severity, for various values of the Rician parameter, K. The dependence of error rates on MRC diversity is also analyzed. The simulation results show that the BER performance of the 32-QAPM system is better than that of the 32-PSSK system under the above mentioned conditions.

• 한국병원경영학회지
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• 제17권3호
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• pp.1-22
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• 2012

The purpose of this study is to analyze the mediating effect of informatization level between characteristics of introducing information system and organizational performance in hospital settings, and to provide suggestions to improve the performance level of strategic information system of hospitals. In order to achieve study purpose, a causal path model was developed and empirically tested. Data were collected from 746 managers of 92 hospitals keeping information system in Busan, Ulsan and Kyungnam Province using self-administered structured questionnaire. Major results of this study were as follows; The results of the path analysis showed that organizational characteristics variables except informatization strength within health industry had significant effects on informatization level, and had indirect effects on organizational performance mediated by informatization level. On the other hand, informatization level, especially revelation capability among informatization level variables, was found to have significant direct effect on organizational performance. These results of empirical test imply that informatization level variables are both important affecting factors on organizational performance and mediating factors between organizational characteristics and organizational performance. Therefore, in order to increase organizational performance, measures improving informatization level should be developed and carried out continuously. And, especially, focusing on building and strengthening revelation capability is crucial to those efforts.

• Journal of Information Technology Applications and Management
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• 제16권1호
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• pp.77-96
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• 2009

The balanced scorecard has drawn attention from many researchers in various fields since its appearance in 1992. It became a norm for performance evaluation framework in many areas, such as marketing, information system evaluation, strategic planning, etc. Centered in the large companies in Korea, the balanced scorecard has been popularly used as a performance evaluation tool for human resource management. Now we Question its applicability to performance evaluation tool even in small business. This study tried to apply the balanced scorecard in developing an information system for performance evaluation in a small business. The study showed that the balanced scorecard can be nicely used in small business as a performance evaluation tool. The process of developing an information system is described in detail. The practitioners are to obtain a lot of insights in designing their human resource management systems from the study results.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권1호
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• pp.86-109
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• 2019

Cloud computing systems' performance is still a central focus of research for determining optimal resource utilization. Running several existing benchmarks simultaneously serves to acquire performance information from specific cloud system resources. However, the complexity of monitoring the existing performance of computing systems is a challenge requiring an efficient and interactive user directing performance-monitoring system. In this paper, we propose an effective multivariate control framework for monitoring cloud systems performance. The proposed framework utilizes the hardware cloud systems performance metrics, collects and displays the performance measurements in terms of meaningful graphics, stores the graphical information in a database, and provides the data on-demand without requiring a third party software. We present performance metrics in terms of CPU usage, RAM availability, number of cloud active machines, and number of running processes on the selected machines that can be monitored at a high control level by either using a cloud service customer or a cloud service provider. The experimental results show that the proposed framework is reliable, scalable, precise, and thus outperforming its counterparts in the field of monitoring cloud performance.

• Asia pacific journal of information systems
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• 제23권4호
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• pp.129-149
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• 2013

According to the development of new Information Technologies, firms consistently invest a significant amount of money in IT activities, such as establishing internal and external information systems. However, several anti-Information activities-such as hacking, leakage of information and system destruction-are also rapidly increasing, thus many firms are exposed to direct and indirect threats. Therefore, firms try to establish information security systems and manage these systems more effectively via an enterprise perspective. However, stakeholders or some managers have negative opinions about information security systems. Therefore, in this research, we study the relationship between multibusiness firms' performance and information security systems. Information security indicates physical and logical correspondence of information system department against threats and disaster. Studies on information security systems suggested frameworks such as IT Governance Cube and COBIT Framework to identify information security systems. Thus, this study define that information security systems is a controlled system on enterprise IT process and resource on IT Governance perspective rather than independent domain of IT. Thus, Information Security Systems should be understood as a subordinate concept of IT and business processes. In addition, this study incorporates information capability to information security system literature to show the positive relationship between Information Security Systems and Corporate Performance. The concept of information capability suggested that an interaction of human, information, technical and an effect on corporate performance using three types of capability (IT Practice, Information Management Practice, Information Behaviors and Values). Information capability is about firms' capability to manage IT infrastructure and information as well as individual employees who use IT infrastructure and information. Thus, this study uses information capability as a mediating variable for the relationship between information security systems and firms' performance. To investigate the relationship between Information Security Systems and multibusiness firms' performance, this study extends the IT relatedness concept into Information Security Systems. IT relatedness provides understanding of how corporations cope with conflicts between headquarters and business units to create a synergy effect and achieve high performance using IT resources. Based on the previous literature, this study develops the IT Security Relatedness model. IT Security Relatedness is our main independent variable, while Information Capability and Information Security Performance are mediating variables. To control for the common method bias, we collect each multibusiness firm's financial performance and use it as our dependent variable. We find that Information Security Systems influence Information Capability and Information Security Performance positively, and these two variables consequently influence Corporate Performance positively. In addition, this result indirectly shows that corporations under a multibusiness environment can obtain synergy effects using the integrated Information Security Systems. This positive impact of Information Security Systems on multibusiness firms' performance has an important implication to various stakeholders. Therefore, multibusiness firms need to establish Information Security Systems to achieve better financial performance.

• 정보관리연구
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• 제40권1호
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• pp.1-27
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• 2009

본 연구에서는 대학도서관 정보봉사시스템의 성과를 측정하기 위하여 선행연구 문헌조사를 통하여 도서관 이용, 문헌자료 대출, 참고봉사 및 이용자교육, 전자서비스 등 4개 영역에 16개 성과측정을 위한 지표를 개발하고 이를 바탕으로 대규모, 중규모, 소규모 대학도서관을 각각 2개 기관씩 모두 6개 기관을 조사하였다. 조사된 결과를 바탕으로 지표의 의미와 활용 방안 및 정보봉사시스템의 성과 향상을 위한 방안을 제시하였다.

• 한국산업정보학회논문지
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• 제23권2호
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• pp.41-52
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• 2018

본 연구에서는 기업의 의사결정에 필요한 회계정보를 산출하는 회계정보시스템의 품질이 기업의 경영성과에 미치는 영향뿐만 아니라 교육성과와 사용자 만족도가 회계정보시스템의 품질과 경영성과의 영향관계에서 매개변수의 역할을 하는지 알아보기 위한 실증연구를 수행하였다. 이를 위하여 회계정보시스템과 경영성과의 영향관계 뿐만 아니라 교육성과와 사용자 만족도의 매개효과를 검증할 수 있는 연구모형을 수립하였으며 이를 바탕으로 연구가설을 수립하였다. 연구가설을 검증하기 위하여 기업의 회계정보시스템 이용자들을 대상으로 설문조사를 실시하고 수집된 자료를 바탕으로 분석을 실시하였다. 설문자료를 바탕으로 실증분석을 수행한 결과를 요약해 보면 다음과 같다. 첫째, 정보시스템의 품질은 교육성과와 사용자 만족도에는 긍정적인 영향을 미치는 것으로 나타난 반면, 경영성과에는 유의한 영향을 미치지 못하는 것으로 나타났다. 둘째, 정보시스템 품질이 경영성과에 미치는 영향관계에 있어서 사용자 만족도와 교육성과는 매개역할을 하는 것으로 나타났다. 이러한 결과는 회계정보시스템이 기업의 경영성과에 기여하기 위해서는 실제 업무를 담당하고 있는 담당자에 대한 체계적인 교육이 필요하며 또한 사용자들의 만족도를 제고할 수 있도록 정보시스템 품질을 지속적으로 관리할 필요가 있다는 것을 보여주고 있다.

• 한국융합학회논문지
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• 제9권10호
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• pp.441-448
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• 2018

본 연구의 목적은 종합병원에서 병원정보시스템 품질요인이 사용자의 만족과 서비스혁신 성과에 미치는 영향을 분석하고자 하였다. 간호사 250명을 대상으로 설문조사 하였으며, 5점 Likert 척도를 사용하여 병원정보시스템 품질, 사용자 만족, 서비스혁신 성과를 측정하였다. 자료 분석은 SPSS WIN 24.0 프로그램을 이용하여 t-test, ANOVA, correlation Regression 분석을 실시하였다. 연구결과는 서비스혁신 성과와 독립변수 간 상관계수는 시스템 품질(r=.644, p<.001), 정보품질(r=.650, p<.001), 서비스품질(r=.629), 사용자 만족(r=.831, p<.001) 으로 유의하였다. 병원정보시스템 품질과 서비스혁신성과에서 사용자 만족이 조절변수로 설명력은 78.4%로, 사용자 만족이 높을수록(B=.557, p<.001) 서비스혁신 성과가 높아지는 것으로 나타났다. 병원정보시스템의 구축에 있어 시스템 품질과 사용자 위주의 지원 및 서비스의 중요성을 바탕으로 실무적인 함의를 제시하였다.

• Asia pacific journal of information systems
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• 제9권1호
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• pp.17-38
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• 1999

While the value of information technology has long been a hot issue, few solid results have been found as of yet. It is partly due to methodological factors and model underspecifcation. This study empirically develops a ITS(information technology structure) taxonomy and investigates the relationships between ITS taxonomy and business performance in the Korean firms. Among factors that impact business performance, organization structure and control system are selected and they are hypothesized to moderate-the relationships between ITS taxonomy and business performance. By surveying 91 manufacturing firms and applying hierarchical cluster analysis, four ITS are identified : centralized, decentralized, centralized cooperative, decentralized cooperative. ANOVA, correlation analysis and crosstable analysis say the presence of moderating effect of organization structure and control system. Cooperative ITS is best in business performance. Centralized ITS is related to functional organizational form. Decentralized ITS is related to product organizational form with decentralized decision making, Centralized cooperative ITS is related to matrix organizational form. Decentralized cooperative ITS is related to matrix organizational form with high integration. These findings have implications for the opportunities and challenges to match information technology with organization structure and control system.

• Asia pacific journal of information systems
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• 제24권2호
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• pp.115-140
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• 2014

In a dynamic business environment, the enterprise mobility solution for a mobile office (EMS) has been adopted to increase the competitive edge of organizations. By using an EMS, performance is expected to be enhanced. However, the related literature has paid little interest to the impact of system quality in an EMS on the information quality produced by the system. On the basis of socio-technical theory, we posited that the system quality in an EMS influences information quality. In addition, we investigated the relationships between the above two qualities, use and job performance by considering task mobility and task inter-dependence as control variables. Survey respondents were from many industries using EMSs. The result of structural equation modeling shows that system quality positively affects information quality, and other relationships in the model are proven statistically significant. We also found that system quality has stronger impacts on use and job performance than information quality does in EMS. However, system quality does not affect use in case both task mobility and task inter-dependence exist. The theoretical and practical implications of the result are discussed in the paper.