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Balog A.,National Institute for Research and Development in Informatics ICI Bucharest
Studies in Informatics and Control | Year: 2011

This paper proposes and tests a multidimensional and hierarchical model for quality evaluation of digital libraries (LibEval). A convenience sample of 252 undergraduate and graduate students was used. Data was collected in October 2010 by means of a paper-and-pencil questionnaire. Results from a confirmatory factor analysis utilizing structural equation modelling techniques confirm the existence of a second-order factor construct (Quality of Digital Library) and five first-order dimensions, namely: interface quality, system quality, information quality, service quality, and contextual factors. The results from this study show empirically that the five dimensions are distinct manifestations of the quality of digital libraries. The user perceives and evaluates the quality of a digital library globally and in each dimension. The LibEval instrument can be utilized to assess the quality of digital libraries from the general user's perspective. Source

Pribeanu C.,National Institute for Research and Development in Informatics ICI Bucharest | Fogarassy-Neszly P.,BAUM Engineering | Patru A.,BAUM Engineering | Patru A.,School Center for Visually Disabled Children
Universal Access in the Information Society | Year: 2014

Despite the existing regulations and standards at national and international level, web content is still difficult to use, if not completely unusable, for visually impaired people. This paper presents the evaluation results for three municipal web sites. A combined method, based on conformance review and expert review, was employed. Overall, the results reveal a low conformance to WCAG2 and many accessibility and usability problems. The content is not properly structured, and this reduces usability even for sighted user. The analysis of the evaluation data suggests that many accessibility barriers could be avoided by adopting a user-centered approach during web design. © 2013 Springer-Verlag Berlin Heidelberg. Source

Tudor V.,University of Agronomical Sciences and Veterinary Medicine | Sipica A.,National Institute for Research and Development in Informatics ICI Bucharest
Studies in Informatics and Control | Year: 2012

The ever faster development of information technologies as well as the progress to information society trigger the increased use of IT tools (software and hardware) in the business environment. This article presents the concept of designing a gateway to the continuous information needed by the small agribusinesses. Although agriculture is the economic sector with the least use of information science, the professional success of the agriculture business players and their mere existence on the market is in part due to the use of computers. The concept is based on a survey carried out in the agricultural business environment of Lunguletu village in Romania. In order to test the formulated hypotheses, we used the nonparametric method for the comparison among Chi square groups. Source

Balog A.,National Institute for Research and Development in Informatics ICI Bucharest
Studies in Informatics and Control | Year: 2015

The success of an e-learning system depends strongly on understanding the factors that influence students' use and acceptance of this kind of system. Technology acceptance models (TAMs) are frequently used in studies investigating the determinants of adoption and usage of new technologies. Drawing on the findings from extant literature on technology acceptance, this study developed and tested a multiple mediator model using TAM3 framework and concepts. The model was tested on a sample of 220 students using Structural Equation Modeling and serial multiple mediation analysis. The study proved that perceived ease of use and perceived usefulness mediate sequentially the relationships between the four external variables - social influence, facilitating conditions, self-efficacy, perceived enjoyment - and behavioral intention to use the e-learning system. The empirical results provide support for the proposed model. The results indicate that the TAM is a theoretically sound model which can be used to predict students' behavioural intention (BI) to use e-learning systems. © ICI Bucharest 2010-2015. Source

Nicoara E.S.,Petroleum Gas University of Ploiesti | Filip F.G.,Romanian Academy INCE and BAR | Filip F.G.,National Institute for Research and Development in Informatics ICI Bucharest | Paraschiv N.,Petroleum Gas University of Ploiesti
Studies in Informatics and Control | Year: 2011

The fast technological progress, along with growing requirements in the manufacturing systems have led in the last decades to a true revolution regarding the optimization methods for job shop scheduling problem (JSSP), which regularly has the greatest impact on the global optimality from the temporal perspective. An extension to the mathematical framework associated to the JSSP for multi-objective flexible JSSP (MOFJSSP) is proposed; here, the flexibility of type II, where the routings of the jobs on the resources are not fixed is considered. Also, a short review of the most used simulationbased optimization methods for (MOF)JSSP is made and a genetic algorithm-based control system is proposed. This is then tested on a complex real-world MOFJSS instance and the ft10 test-instance. Source

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