Rijeka, Croatia
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Orehovacki T.,University of Pula | Babic S.,Polytechnic of Rijeka
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

Social web applications are nowadays commonly employed in all fields of human endeavor. It is therefore of a high importance that they meet requirements of as many quality dimensions as possible. This paper reports findings of an empirical study which was carried out with an aim to examine quality of social web applications when they are used in a mobile environment. Participants in the study were students from two Croatian higher education institutions who carried out predefined scenario of interaction with two social web applications for collaborative writing on their smartphones and afterwards evaluated their perceived quality by completing the post-use questionnaire. The analysis of collected data uncovered the relevance of pragmatic and hedonic facets of mobile quality in the context of evaluating social web applications for collaborative writing. © Springer International Publishing Switzerland 2016.


Orehovacki T.,University of Pula | Babic S.,Polytechnic of Rijeka
2016 39th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2016 - Proceedings | Year: 2016

Being a convenient replacement for their desktop counterparts, social Web applications are nowadays widely employed in diverse aspects of human endeavour, including education. Current body of knowledge on assessment of social Web applications is composed of studies that were mainly focused on quantitative measurement of their quality when they were used in their primary setting. On the other hand, there is a lack of studies related to the evaluation of social Web applications when they are employed on mobile devices such as smartphones or tablets. This paper presents findings of the empirical study that was carried out with an objective to evaluate the mobile quality of social Web applications from qualitative perspective. For that purpose, the retrospective thinking aloud method was applied. Participants in the study were students from two different higher education institutions who completed predefined scenario of interaction with two social Web applications for collaborative writing: Google Docs and Zoho Docs. The most relevant facets of mobile quality in the context of social Web applications are uncovered and discussed. © 2016 Croatian Society MIPRO.


Babic S.,Polytechnic of Rijeka
2013 36th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2013 - Proceedings | Year: 2013

Complex educational environment is one of the key components in considering teacher's acceptance of distance education and can be observed in different scopes in relation to the teacher. This paper deals with an immediate educational environment as a group of situational factors consisting of student characteristics and content/course characteristics and their influence on accepting the technology by university teachers. © 2013 MIPRO.


Panlic M.,University of Rijeka | Niesirovic N.,University of Rijeka | Jakupovi M.,Polytechnic of Rijeka
WMSCI 2013 - 17th World Multi-Conference on Systemics, Cybernetics and Informatics, Proceedings | Year: 2013

Graph-based fornialisnis pros ide an intuitive and easils understandable sehicle for knowledge representation In this paper seseral existing graph-based Gimalisms are described. Furthermore, i nest graph-based frrmalisni for know ledge representation is defined. Basic concepts fir graphical representation nodes and ltnkst .is ss eli as their ,iriatioii are described. ('onies.t node, context link and process node ,ire defined in oriler to represent different kinds and lesels of know ledge know ledge network diagram defined rum sentences expressed in natural language is presented. The maui goal of this fbrniulisni is to present know ledge storsd in textual felds in the databases.


Pavlic M.,University of Rijeka | Dovedan Han Z.,University of Zagreb | Jakupovic A.,Polytechnic of Rijeka
Expert Systems with Applications | Year: 2015

The paper describes the development of a system for receiving questions from users and providing answers, which is a part of a larger knowledge-based (KB) system based on Node of Knowledge (NOK) conceptual framework for KB system development. A part of NOK conceptual framework is described, as well as a new method of text-expressed knowledge representation - formalized NOK (FNOK). Furthermore, the structure of system for user interaction and NOK based KB system named Question Answering NOK (QANOK) is presented. The paper answers the question whether it is possible to create a part of QANOK over FNOK formalized knowledge which would accept user questions using natural language and provide answers in natural language. Three algorithms were developed - an algorithm which translates text-expressed knowledge in natural language into FMTEK (Formalized Method for Text Expressed Knowledge) formalized notation, an algorithm which translates a question in natural language into qFMTEK (question FMTEK) formalized knowledge notation, and an algorithm which uses qFMTEK formalized question to find an answer within FMTEK formalized knowledge. Algorithms were tested against a predefined set of sentences and questions in English language. Limitations of developed algorithms are also presented, as well as further development of QANOK system. © 2015 Elsevier Ltd. All rights reserved.


Orehovacki T.,University of Zagreb | Babic S.,Polytechnic of Rijeka
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

Educational games are specific piece of slow technology that enables students to enhance their competences through fun and play. Taking into account their features, games are widely used in diverse educational settings, including programming. This paper discusses findings of the empirical study that was carried out with an objective to examine quality of two educational games meant for learning programming concepts. Participants in the study were students from two Croatian higher education institutions. Subjective data was collected with pre- and post-use online questionnaires whereas objective data was gathered with reports in the form of in-game progress screenshots. The analysis of collected data uncovered: (1) to what extent students with different background knowledge differ in their perception of programming and attitudes towards using games for educational purposes, and (2) which pragmatic and hedonic facets of quality are relevant for the assessment of games designed for learning programming. © Springer International Publishing Switzerland 2015.


Peric L.,Ruder Boskovic Institute | Petrovic S.,Polytechnic of Rijeka
Fresenius Environmental Bulletin | Year: 2011

The objective of the present work was to provide the data on acetylcholinesterase (AChE) activity in the gills of marine mussels Mytilus galloprovincialis from northeastern part of Adriatic Sea. In the first part of the study, range and pattern of AChE activity annual variation was established by monthly investigation of two populations of mussels originating from different natural habitats. No correlation of AChE activity and environmental parameters (temperature, salinity, oxygen) was found. Seasonal monitoring along the coast at sites with presumably different level and type of contamination was also performed in order to study the spatial and temporal trend of AChE activity in mussels, in relation to possible exposure to neurotoxic compounds. Significantly lower enzyme activity in comparison to reference site was recorded at sites in the close vicinity to urban and industrial areas (P and R). In addition, AChE activity decreased at the site within the area of Lim Bay (LI). AChE reduction in the gills of mussels, recorded mostly in the polluted harbours, could be related to the presence of common environmental pollutants. The results obtained in this study will be useful as background data for future biomonitoring surveys along the Adriatic coast using M. galloprovincialis as sentinel organisms. © by PSP.


Jakupovic A.,Polytechnic of Rijeka | Pavlic M.,University of Rijeka | Han Z.D.,University of Zagreb
Expert Systems with Applications | Year: 2014

This paper describes a method of knowledge representation as a set of text expressed statements. The method is based on the identification of word-categories/phrases and their semantic relationships within the observed statement. Furthermore, the identification of semantic relationships between words/phrases using wh-questions that clarify the role of the word/phrase in the relationship is described. A conceptual model of the computer system based on the formalization method of text-expressed knowledge is proposed. The subsystem text formalization is described in detail, especially its parts: syntactic analysis of the sentence, sentence formalization, phrase structure grammar and lexicon. The phrase structure grammar is formed by induction and it is used to generate the language of the formalized notation of a sentence. The derivation of grammar is based on the simple phrase structure grammar which was used for the syntactical analysis of informal language notation. In its base, the suggested method translates sentences of the informal language into formal language sentences which are generated by the derivated phrase structure grammar. Current limitations of the method that also set the path of its further development are shown. Next concrete steps in the development of the method are also described. © 2014 Elsevier Ltd. All rights reserved.


Hitrec I.,Polytechnic of Rijeka | Pogarcic I.,Polytechnic of Rijeka | Suman S.,Polytechnic of Rijeka
MIPRO 2011 - 34th International Convention on Information and Communication Technology, Electronics and Microelectronics - Proceedings | Year: 2011

eLearning, as one of the organised form of learning and teaching, frequently moves centre of attention towards one of its constitutional elements. Though the central line, teacher student that practically constitutes learning basically doesn't change the importance of neither, it still creates different relationships in the realisation. Learning contents can also appear in centre of consideration, both on organisational and execution level. Determination of content depends not solely of teacher student relationship, but also of goals which learning tries to accomplish. Regardless to the use of traditional learning or more modern forms of eLearning and mLearning, the holders of information, like books and similar gradually tend to be replaced by electronic media and virtual bookshops. Communication dimension of eLearning provides a possibility of forming the eClass and creating the adequate groups of students which traditional learning cannot generate. Paper considers the level of changing the learning content's role through verifying and analysing the relationship between students and teachers and social networks and social software. Special attention has been concentrated on confidence towards such forms of learning contents in comparison to their mode of creation and preservation. © 2011 MIPRO.


Babic S.,Polytechnic of Rijeka
MIPRO 2011 - 34th International Convention on Information and Communication Technology, Electronics and Microelectronics - Proceedings | Year: 2011

Throughout history, the educational process used different educational technologies which did not significantly alter the manner of learning in the classroom. By implementing e-learning technology to the educational process, new and completely different innovative learning scenarios are made possible, including more active student involvement outside the traditional classroom. The quality of the realization of the educational objective in any learning environment depends primarily on the teacher who creates the educational process, mentors and acts as a moderator in the communication within the educational process, but also relies on the student who acquires the educational content. The traditional classroom learning and e-learning environment enable different manners of adopting educational content, and this paper reveals their key characteristics with the purpose of better use of e-learning technology in the educational process. © 2011 MIPRO.

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