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RRIOC Tables of Contents: 01020304050607

Romanian Journal of Human-Computer Interaction 5

Editors:Dorian Gorgan; Costin Pribeanu
Dates:2012
Volume:5
Publisher:MATRIX ROM
Standard No:ISSN 1843-4460
Papers:12
Links:Journal Home Page | Table of Contents
  1. RRIOC 2012 Volume 5 Issue 1
  2. RRIOC 2012 Volume 5 Issue 3

RRIOC 2012 Volume 5 Issue 1

Modelling the repurposing of teaching resources in medical domain through social networks and semantic web BIBAKPDF 1-18
  Teodor Stefanut; Dorian Gorgan; Eleni Kaldoudi
The development of teaching materials has currently became one of the main concerns of the specialists from various domains, including medicine. The continuous development of e-Learning applications demands the creation of new types of resources that encourage individual study activities with automatic system monitoring and less involvement from the teacher. One of the most promising approaches used currently for creating this type of educational materials in an efficient manner is the improvement and repurposing of the already existing resources. Nevertheless, this method generates new issues related with the description of the connections between the involved resources and also with the search process and identification of the relevant, good quality materials. In this paper we present a possible solution to these problems based on the characteristics of the social networks blended with functionalities specific to the semantic web. Through these tools we will describe the relations between resources and will consequently be able to provide more significant search results. The application presented, called Metamorphosis+, exposes a user interface that hides the complexity of the description process and allows users without technical background to benefit from the provided functionalities.
Keywords: semantic web, social network, Web 2.0, repurposing of teaching materials
Automatical musical genre detection BIBAKPDF 19-36
  Adrian Simion; Stefan Trausan Matu
This paper describes and applies various methods for automatic computer music segmentation. Based on these results and on the feature extraction techniques used, is tried also a genre classification/recognition of the excerpts used. The algorithms were tested on the Magnatune and MARSYAS datasets, but the implemented software tools can also be used on a variety of sources. The tools described here will be subject to a framework/software system called ADAMS (Advanced Dynamic Analysis of Music Software) that will help evaluate and enhance the various music analysis/composition tasks. This system is based on the MARSYAS open source software framework and contains a module similar to WEKA for data-mining and machine learning tasks.
Keywords: automatic segmentation, audio classification, music information retrieval, music content analysis, chord detection, vocal and instrumental regions.
MOM -- software instrument for the analysis of graphical user interface accessibility. Functionality and case studies BIBAKPDF 37-54
  Paul Fogarassy-Neszly
The graphical user's interfaces accessibility is a key condition for visual disabled peoples to use the computer applications. This paper presents the MOM (Meaningful Object Manager) software tool for accessibility analysis of graphical user interfaces. The accessibility depends not only on the tested applications, but also on assistive technologies. During this paper the functionalities of the MOM tools are described as well as the way these are used for accessibility evaluation. For each component are presented several case studies.
Keywords: accessibly, assistive technology, visual impairment.
Municipal web sites accessibility: conformance evaluation against WCAG 2.0 BIBAKPDF 55-72
  Ruxandra Dora Marinescu
Although the web accessibility problem was given a high visibility at European level, the progress is still unsatisfactory. In this paper we present the results of a study carried on in 2012. The purpose of the study was to assess the conformance against WCAG 2.0 accessibility guidelines of 98 web sites from the local public administration. For each web site three web pages were evaluated. The results are comparatively analysed with those of a previous study from 2011, targeting a sample of 30 municipal websites. The results show a low level of web accessibility.
Keywords: accessibility, WCAG 2.0, conformance evaluation
Some remarks on the relationship between the users' personality profile and their preference for Facebook use BIBAKPDF 73-92
  Ana Maria Marhan; Camelia Mihaela Popa
Recent studies focuses on topical issues related to Facebook, its use and impact on billions of young people's social life who may accessing this website on a daily basis. User public profiles, as well as the content they distributed throughout the network can provide teachers and counsellors with a variety of socio-demographic information, along with information on skills, preferences, hobbies, and personality traits. Therefore, this paper critical examines the results of studies examining the online behaviour of users, particularly students, in order to analyse how certain personality traits may influence their preferences in using Facebook, as well as the relevance of such findings for the educational practice.
Keywords: Facebook, social network, behavior, personality, identity.
Evaluation of an augmented reality based learning platform using the think aloud protocol an peer tutoring BIBAKPDF 93-106
  Dragos Daniel Iordache
In this paper are presented the evaluation result of an augmented reality platform for teaching chemistry based on a methodology which combines the think aloud protocol -- TAP and peer-tutoring method. During TAP, the student's task was to think aloud while solving the exercises from chemistry scenario. The students where asked to describe all they think, do and feel during the exercises. Peer tutoring supposed that students who tested the application based on TAP, teach other students to use it. We consider that this approach supports a better communication during testing then the communication of students with an adult and also offer more information about the potential of the application to be learned.
Keywords: evaluation, augmented reality, TAP, peer tutoring.

RRIOC 2012 Volume 5 Issue 3

Applications for automatic transliteration between English and Romanian BIBAKPDF 1-14
  Tiberiu Boros; Adrian Zafiu
Transliteration has been previously introduced for translating proper names between languages, when the two languages are incompatible at the phonetic level and they use very different alphabets. We propose an data-driven method for transliteration from English to Romanian and we present a series of applications based on this task, such as text-to-speech synthesis (on multilingual text) and what we call "perception based search".
Keywords: transliteration, speech synthesis, maximum entropy.
POS tagger based on second-order HMM BIBAKPDF 15-34
  Dumitru-Clementin Cercel; Stefan Trausan-Matu
Part-of-speech tagging (POS tagging) is the process of grammatical labelling of each word in a sentence, phrase or paragraph with the corresponding part of speech. This process is a component of other modules of natural language processing and therefore the results should be as precise as possible. Once a part of speech has been identified, it provides supplementary information about the parts of speech that can appear in the same sentence. In the case of POS tagging, the ambiguities arise due to the fact that a word may have multiple morphological values depending on context. In this paper is performed, from an experimental perspective, an analysis of a POS Tagger based on a Second-Order Hidden Markov Model, using the Brown corpus. The tests have been conducted to obtain results according to various parameters. We will show how changes the accuracy of a POS tagger for English when become different, on the one hand, the training set size, and on the other hand, the domains of the original functions in comparison with the domain of the training set. We have identified the categories of texts from Brown corpus used for the training corpus when the accuracy of the POS tagger is higher, lower respectively.
Keywords: NLP, POS Tagging, trigrams, HMM, Viterbi algorithm, the Brown Corpus.
Testing of a model based on UTAUT for the acceptance of e-learning systems BIBAKPDF 35-58
  Alexandru Balog
The purpose of this study is to test a model of acceptance of e-learning based on UTAUT model developed by Venkatesh, Morris, Davis and Davis (2003). After a brief presentation of the UTAUT model and recent studies in the field of e-learning, are described the proposed model and the hypotheses, methods used and results obtained. By applying multivariate analysis methods on a sample of students (N = 224), the results show that the model is viable in the context of e-learning in Romania. The model explained 63% of variance of Intent to continue the use of e-learning.
Keywords: e-learning acceptance, UTAUT, EFA, CFA.
Diagramatic description of distributed spatial data processing BIBAKPDF 59-80
  Vasile Danut Mihon; Angela Minculescu; Vlad Colceriu; Dorian Gorgan
Most of the times, modeling and simulating natural phenomena involves a large number of operations, based on different compatibility constraints and rules. The solution proposed in this paper optimizes the entire description process through execution workflows. It offer the users special interaction techniques for workflow specification, automatic mechanism for syntactic validation of the described phenomena, hierarchical organization of the workflow, collaborative environment, reuse of resources, graphical modules customization. The proposed solution is intended to be used by both technical and non-technical users that do not have knowledge about the computational infrastructure. This paper describes the features implemented within the WorkflowEditor application that allows the interactive workflow development used in distributed processing of spatial data.
Keywords: workflow, hypergraph, distributed processing, spatial data, use case, syntactic rules, collaborative environment.
Controlling the applications running on a Windows system by means of Android devices BIBAKPDF 81-96
  Cristina Serban; Irina Grosu; Alexandra Siriteanu; Alexandru Averescu; Adrian Iftene
This article presents a client-server application that, enabling the user to remotely control with an Android component the applications running on the Microsoft Windows operating system. The system consists of two main modules: the client (the application running the user's phone) and the server (the application running on the computer). Additionally, there are two means of communication between the two key components: Wi-Fi and Bluetooth. Tests we have done on this solution demonstrated the robustness of the application in use over a long period of time, stress testing and communication when there are objects between client and server.
Keywords: Android, Windows services, remote control.
Specific aspects regarding the usability of faculty admission websites BIBAKPDF 97-108
  Grigoreta-Sofia Cojocar; Adriana-Mihaela Guran
Faculty admission websites are used every year by thousands of people looking for some kind of information. In this paper we present an empirical evaluation of Babes-Bolyai University faculty admission websites. The university has 21 faculties, each one having its own website. The evaluation is performed using different criteria (i.e., the design, the displayed information, the language used, etc) derived from usability heuristics.
Keywords: website usability evaluation, university admission websites.