• Journal of Information Technology Applications and Management
• /
• 제24권3호
• /
• pp.1-21
• /
• 2017

Business Intelligence (BI) system is a strategic tool that presents an analytical perspective about business and external environments. Even though its strategic value was well known, users often avoid using it or adopt it ceremonially. In fact, over 50 per cent of BI projects worldwide are reported to end in failure. Such an unexpectedly lower success rate has been a key issue in BI studies. In order to enhance a proper use of information systems, MIS field provided a number of theoretical constructs. One example is Goodhue & Thompson's Task-Technology Fit (TTF). In addition, internalization, the degree to which people make their own effort to modify behavior, was recently suggested as another important determinant of use. Though in MIS community both TTF and internalization proved to be a key determinant of system use, there has been not much study aiming to discover antecedents influencing these constructs. In this study we assert that user participation should be highlighted in BI projects. Especially, we emphasize user participation at the phase of feasibility study that is mainly conducted to determine whether a BI system is essentially necessary and practicable. Our research model employs participative feasibility study as a major antecedent for TTF and internalization that consequently will lead to user satisfaction and actual use. This model was empirically tested on 121 BI system users. The result shows that user participation in feasibility study is positively associated with TTF and internalization, each being related to user satisfaction and system use. It implies that, if an organization has BI users get involved in strategic feasibility study phase, the BI system would turn out to fit users' tasks and, furthermore, users would put more efforts spontaneously in order to use it properly.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제16권6호
• /
• pp.1877-1891
• /
• 2022

As a part of cloud computing technology, algorithms for cloud task scheduling place an important influence on the area of cloud computing in data centers. In our earlier work, we proposed DeepEnergyJS, which was designed based on the original version of the policy gradient and reinforcement learning algorithm. We verified its effectiveness through simulation experiments. In this study, we used the Proximal Policy Optimization (PPO) algorithm to update DeepEnergyJS to DeepEnergyJSV2.0. First, we verify the convergence of the PPO algorithm on the dataset of Alibaba Cluster Data V2018. Then we contrast it with reinforcement learning algorithm in terms of convergence rate, converged value, and stability. The results indicate that PPO performed better in training and test data sets compared with reinforcement learning algorithm, as well as other general heuristic algorithms, such as First Fit, Random, and Tetris. DeepEnergyJSV2.0 achieves better energy efficiency than DeepEnergyJS by about 7.814%.

• 한국항공운항학회지
• /
• 제24권3호
• /
• pp.10-18
• /
• 2016

This paper deals with the Performance Based Logistics(PBL) application scheme pertaining to optimal maintenance program for logistics of Korean Fighter Experimental(KF-X) Project. For enhancement of the performance based logistics system application to KF-X program the selection of appropriate standards fit to maximize cost-cutting, a set of performance metrics fit for the purpose of the contract, foreign technology dependence of core equipments and parts were considered. Thus, selecting appropriate standards fit for Korean logistics environment, domestic maintenance enterprise for stable rate of operation of KF-X, a systematic reliability task that is able to measure quantitative combat capability are suggested.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제10권7호
• /
• pp.2952-2971
• /
• 2016

Outsourcing jobs to a public cloud is a cost-effective way to address the problem of satisfying the peak resource demand when the local cloud has insufficient resources. In this paper, we studied the management of deadline-constrained bag-of-tasks jobs on hybrid clouds. We presented a binary nonlinear programming (BNP) problem to model the hybrid cloud management which minimizes rent cost from the public cloud while completes the jobs within their respective deadlines. To solve this BNP problem in polynomial time, we proposed a heuristic algorithm. The main idea is assigning the task closest to its deadline to current core until the core cannot finish any task within its deadline. When there is no available core, the algorithm adds an available physical machine (PM) with most capacity or rents a new virtual machine (VM) with highest cost-performance ratio. As there may be a workload imbalance between/among cores on a PM/VM after task assigning, we propose a task reassigning algorithm to balance them. Extensive experimental results show that our heuristic algorithm saves 16.2%-76% rent cost and improves 47.3%-182.8% resource utilizations satisfying deadline constraints, compared with first fit decreasing algorithm, and that our task reassigning algorithm improves the makespan of tasks up to 47.6%.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2003년도 추계학술대회 및 정기총회
• /
• pp.99-102
• /
• 2003

While information technology has been advanced impressively, the issue of system underutilization has continued. Although TAM provides a theoretical and empirical model for explaining information technology acceptance, there exist some issues: lack of focusing task and organization. The present study examines the motivational factors influencing the beliefs about the system, in terms or the extended TTF (task-technology fit) model, to address the issues. For this purpose, an exploratory case study was conducted based on the data gathered from a Web-based survey. The present research proposes five propositions, based on the results of the case study and prior study findings, which can be used as a starting point fur future research.

• International Journal of Advanced Culture Technology
• /
• 제10권4호
• /
• pp.383-388
• /
• 2022

This thesis explores the principle of a performer's organic action by means of his/her bodily responses on stage. This research has been developed to define the nature of a performer's central task in order to constitute empirical understanding of acting and the purpose of training in addressing the question of what sort of qualitative bodily training is necessary to be in a state of the full body involvement. This study investigates to articulate a performer's fundamental task at the most rudimentary level by utilizing those theatre artists' concepts with practical assumptions. In particular, the key terms, happen and change signifies the quality of a performer's body that has to fit into the given environment in which the performer's body can be subordinated through the moment on stage. Here, we argue that a performer's essential task parallel to make the following moment to happen and change by means of progressing a set of the next moment. In this manner, we also argue that a moment of displaying the performer's conscious effort, forceful and externalizing the visible elements under the use of erroneous language leads his/her body not to function on stage, a state of disengagement from his/her body. Finally, we provide a way to facilitate a performer's organic action by focused on his/her lived experience to create the functional moment which is opposite to the predominance of a representation, maintaining the performer's intellectual sense.

• 경영과학
• /
• 제34권1호
• /
• pp.57-70
• /
• 2017

The phenomenon of increasing aging population is one of the crucial social and economic issues in these day. In this paper, drawn from the industrial application cases and relevant literatures, we present the typology of ICT convergent applications targeted for silver generation, referred as silver ICT. Subsequently, the contributional value of ICT as the enabling technology is estimated. We firstly conduct keyword search to collect currently used silver ICT applications. Secondly, drawn from the social welfare literature, we organize distinctive needs of the silver generations. Then, on the basis of task technology fit framework, typology of ICT enabled silver applications is organized through the fit of ICT in the sense of fulfilling those silver needs. Finally, using the industry input-output table figures, potential ICT contributions for silver ICT are estimated. The proposed silver ICT typology and ICT contributions provides useful insights for further research in the area of ICT convergence and silver market research.

• Journal of Information Technology Applications and Management
• /
• 제16권2호
• /
• pp.1-21
• /
• 2009

The balanced scorecard(BSC) framework is a tool for strategic decision making and task support that aims for efficiency in performance management and strategy execution. BSC evolved from an old performance management practice, which tended to be limited to a finance-only perspective, to a new system of corporate management looking at corporate tasks from a multi-dimensional, future-inclined value perspective. This form of BSC amounts to a framework capable of driving management innovation and renewing the ways in which companies conceive their strategy and perform their operations. Since BSC draws integrally on user participation, it can be expected that users' satisfaction with BSC systems is an important factor in systems' success or failure. However, previous studies of the BSC system have not yet considered it as a theoretical model, specifically examining BSC system and task characteristics. To date, only a few studies have put forward plans for the implementation and use of BSC systems, and these studies have the common limitation of failing to consider the circumstances or theoretical structure of the companies for which a BSC system is being proposed. This paper then begins to fill some of this gap by characterizing the BSC system from the perspective of contingency theories. Contingency theories can be particularly useful in the Korean context in exploring how different companies use the BSC system in ways determined by their unique environmental characteristics, which may also determine the performance factors behind the application of a company's particular BSC system. In order to provide concrete suggestions for implanting and using the BSC system from a contingency theory perspective, this study sets out to determine the relationships between the contingency variables affecting BSC system performance and BSC system property variables(in given cases) through an empirical analysis. The study takes into account the perspective from which contingency theory is to be applied in individual cases, sets contingency and BSC property variables with reference to the BSC system user's environment and BSC system's character, and frames initial hypotheses concerning corporate structure and environmental variables and BSC system performance variables with reference to previous studies. A survey was then conducted on users in Korean companies that have implemented the BSC system in order to verify the research model and understand results.

• 정보화정책
• /
• 제24권1호
• /
• pp.79-99
• /
• 2017

빅데이터 관련 기술이 점차 성숙해지고 있고 공공부문을 중심으로 초기 성공사례들이 발표되고 있으나 실질적인 가치 창출에 대한 확신 부족과 개인정보 유출에 대한 여전한 우려로 산업 전반으로의 확산이 더딘 실정이다. 본 연구에서는 빅데이터 도입 과정에서 다양한 이해관계자 집단 별로 긍정적, 부정적 인식이 도입 활성화에 어떠한 차이를 보이는지 탐색적으로 규명하고자 한다. 먼저 기술수용모형(TAM)과 업무기술적합성(TTF) 모형, 프라이버시 계산이론을 바탕으로 긍정적인 평가요인과 부정적인 평가요인을 통합하여 독립변수를 개발하고 빅데이터 이용의도를 종속변수로 하는 연구 모형을 개발하였다. 국내 빅데이터 실사용자 또는 잠재적 사용자를 대상으로 실증 분석한 결과 선행요인 중 빅데이터의 인지된 유용성, 업무기술적합성, 개인정보침해위험이 이용의도에 유의미한 영향을 주고, 사용용이성은 유의성이 없는 것으로 나타났다. 또한 각 요인 별로 빅데이터 활용 주체에 따른 집단 간 변수의 평균 차이를 부분적으로 발견할 수 있었고, 독립변수와 종속변수와의 인과관계에서도 일부 조절효과를 발견하였다. 본 연구의 시사점을 통해 향후 빅데이터의 산업 활성화를 위해서 이해관계자 별 차별화된 정책 개발이 필요한 시점이다.

• 디지털융복합연구
• /
• 제14권9호
• /
• pp.215-227
• /
• 2016

본 연구는 융 복합 시대에서 직무 임베디드니스의 중요성을 인식하고, 직무 임베디드니스가 직무몰입에 미치는 영향과, 직무의미성이 이들 간의 관계에 있어서 조절효과를 하는지 실증검증을 통해 살펴보고자 하였다. 검증결과, 첫째, 직무 임베디드니스의 적합성과 희생 및 연계의 요인들은 직무몰입에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 직무의미성에 따라 직무 임베디드니스가 직무몰입에 미치는 영향은 대부분 달라지는 것으로 나타났다. 하지만 직무 의미성의 기술다양성과 과업정체성은 직무 임베디드니스의 적합성이 직무몰입에 미치는 영향에 대한 조절효과가 없는 것으로 나타났다. 이는 직무가 작업자에게 기능과 능력을 충분히 발휘할 수 있는 기회를 제공한다 할지라도, 작업자가 직무에 대한 스트레스, 동기수준 등과 같은 태도에 영향을 더 많이 받을 수 있으며 결과적으로 직무에 대한 몰입이 어려울 수 있음을 의미한다. 이러한 연구 결과는 학술적 실무적으로 시사하는 바가 클 것으로 사료된다.