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RRIOC Tables of Contents: 01020304050607

Romanian Journal of Human-Computer Interaction 4

Editors:Dorian Gorgan; Costin Pribeanu
Dates:2011
Volume:4
Publisher:MATRIX ROM
Standard No:ISSN 1843-4460
Papers:10
Links:Journal Home Page | Issue 1 Abstracts and Author Information | Issue 2 Abstracts and Author Information | Table of Contents
  1. RRIOC 2011 Volume 4 Issue 1
  2. RRIOC 2011 Volume 4 Issue 2

RRIOC 2011 Volume 4 Issue 1

The development and testing of a hierarchical model for the evaluation of on-line libraries quality (LibEval) BIBAKPDF 1-22
  Alexandru Balog
The purpose of this study is to identify the dimensions of on-line libraries quality, and to develop a reliable and valid measurement instrument (LibEval). After a brief literature review, we present the research model and the development and testing methodology used. The model is specified as a second-order factor (on-line library quality) with five dimensions that are modeled as first-order factors (interface quality, system quality, information quality, service quality, and context). The model is rigorously tested using empirical data and the results support the research model. Finally, the utility of the proposed model is discussed for implications, limitations and future research.
Keywords: on-line library, digital library, evaluation model, quality evaluation, measurement scale, hierarchical model, multidimensional model, EFA, CFA
Image recommendation system based on social, semantic and visual characteristics BIBAKPDF 23-50
  Maria Roditis; Andreea Tabacariu; Stefan Trausan-Matu
The article presents recommendation systems in terms of the most important aspects and types of algorithms used in different approaches and implementations, as well as issues which arise and need to be overcome. The application presented in this article was developed based on a combination of multiple ways to recommend images. The proposed model brings quality results using the following aspects of recommendation: social -- by applying the concept of collaborative filtering, visual -- by calculating the similarities between the visual features extracted from images, semantic -- using metrics based on WordNet similarity between terms, and also by integrating a SVM classifier for recognition of scene types based on visual aspects. We present in detail the scientific methods and the architectural design used in our proposed system.
Keywords: image recommendation, semantic, social, visual features, classification
Guidelines for the design of new interactive technologies for children BIBAKPDF 51-64
  Ana Maria Marhan
The way children learn, play, interact with parents or communicate with friends is significantly impacted by the ubiquity of digital technologies in their early life. Successful development of new technologies aimed specifically at children requires designers to become acquainted with the characteristics of such a special group of users. Establishing a precise but complex design framework, with well-articulated and thorough tested theoretical models of the end-user, is therefore a prerequisite for generating reliable sets of guidelines able to inform and orient the technology development process.
Keywords: child, computer, cognitive development, concrete operational stage
A case study in specifying a formative index for the analysis of an e-learning application usability BIBAKPDF 65-80
  Costin Pribeanu
Up to now few approaches to usability evaluation exist that are using structural models to analyze the causal relations between various factors influencing the quality of use and / or the intention to use. Also, few measurement models exist that are including composite constructs targeting several dimensions. Adequate specification of measurement models according to the nature of construct and direction of causal relations between a construct and its measures is an important research topic in recent years. In this paper a synthesis of recent advances in formative models specification and validation methodology is presented. The methodology was applied to develop a structural model having as focal variable a composite construct measured with formative indicators. The purpose of this study is to get more insights into specific usability issues and to analyze the relationship between usability and the perceived enjoyment.
Keywords: measurement model, formative index, usability, perceived enjoyment
Software solutions for statistical data representation in GIS by combining symbologies BIBAKPDF 81-92
  Marian Dârdala; Adriana Reveiu
Various types of cartograms in the geographic information systems (GIS) present elements from reality, being in interdependence with their location. The problem of representation of a large set of information on the cartograms is of actual interest because the user can perceive the reality through its many graphic features. The paper aims to present a series of techniques to build cartograms by combining symbologies in a GIS. The possibility to combine symbologies is based on the fact that, in addition to surface filler simple symbologies, there are overlapping symbologies, aiming to draw graphical objects on spatial data of polygon type. Thus, the user may perceive in addition to the background colour, which quantifies a characteristic of reality, other features represented by overlapping elements, like charts, symbols with various size, or dots with different densities.
Keywords: cartogram, GIS, symbologies, classes hierarchy, spatial database, thematic composition, extension

RRIOC 2011 Volume 4 Issue 2

Interaction with a Web browser through gestures BIBAKPDF 93-108
  Mihaela Coneac; Adrian Iftene
Abstract. This aim of this article is to present a new way to interact with a personal computer. Thus, a user can use a webcam and hand gestures to give commands when using a common web browser like Internet Explorer. After a training process of the application, where it is learned what means postures palm, two fingers or fist, it uses the AdaBoost algorithm to classify a hand posture received from the user in real time. Combining posture identified with posture trajectory, we obtain the command that gives the user to browser. Implemented operations allow us to perform vertical scroll, zoom in and zoom out, jump between active windows, jump between options and to select an option. The results so far are encouraging and we hope that in future this kind of interaction will be increasingly used.
Keywords: hand gestures, human-computer interaction, the classification algorithm
Case Study: Automatic Identification of Romanian Suffixes BIBAKPDF 109-130
  Verginica Barbu Mititelu
Assuming the perspective of automatically identifying derived words and their bases in the Romanian wordnet, with the aim of enriching it with derivational relations and semantic labels associated to them, in this article we present the results of a case study whose aim was to automatically identify suffixes by means of which new words are created in Romanian. In the beginning of the paper we make a brief overview of derivation in Romanian, also anticipating the challenges of our study. For the automatic identification of the suffixes in words we used generalized suffix trees for representing the lemmas in an electronic Romanian lexicon. We imposed a series of filters, identified via observation, by means of which we improved the results. For the evaluation of the identified suffixes we used gold standard lists of suffixes grouped according to the part of speech of the derived words. The evaluation of results was performed in three stages, by comparing them with the gold standard list of suffixes, with the gold standard list of suffixes and suffixoides, and with the unified gold standard list of suffixes and suffixoides of the parts of speech displaying homonymy in Romanian. We showed how the precision and accuracy of the algorithm change with the threshold imposed on the productivity of suffixes. The present study reveals the necessary knowledge for recognizing the morphological structure of words, the difficulties encountered in this process, and also the importance of this study for linguistic research, for the Artificial Intelligence domain, in tasks such as information retrieval, summarization, question answering and all the other tasks relying on natural language processing.
Keywords: suffix, derivation, stemming, morphological analysis, generalized suffix tree
WikiDetect: Automatic Vandalism Detection On Wikipedia BIBAKPDF 131-156
  Dan Cioiu; Traian Eugen Rebedea
Article vandalism has always been one of the greatest security issues of Wikipedia, yet few automatic (non-human) solutions for this problem have been developed so far. Large amounts of time are spent by volunteers correcting vandalized edits, instead of using this time to add quality content to Wikipedia articles. The purpose of this paper is to introduce a new vandalism detection system, based on a machine learning technique trained on a corpus of real data, and to test its performance. The application functions in a very realistic environment, as it analyzes expert annotated wikitext, extracted from the encyclopedia's database, which is used to evaluate different vandalism detection algorithms. The paper presents a critical analysis of the obtained results, comparing them to existing solutions, and suggests different statistical classification methods that bring improvements to the system.
Keywords: Wikipedia, vandalism, spam, classification
Computer Assisted Music Composition BIBAKPDF 157-174
  Constantin Prica
The belief that computers cannot play a central role in music composition is wrong. Research has been conducted in this field for over 50 years. In this paper, we propose an application which can be of real help to a composer in the music composition process. The chosen music genre is one that is highly formalized, namely strict counterpoint. The rules and constraints of the genre are suitable for a recursive implementation of generating and testing candidates. Using this method, the application composes up to 10.000 lines of valid counterpoint. The results are promising, being similar to those presented by a human composer. The aid provided by computers, if accepted, could transform music composition.
Keywords: music composition, counterpoint, backtracking, music evaluation
Usability Specific Heuristics for Parallel and Distributed Applications BIBAKPDF 175-192
  Dorian Gorgan; Cristian Rusu; Danut Mihon; Vlad Colceriu; Silvana Roncagliolo; Virginica Rusu
The usability of the applications based on new technologies arises new issues. New evaluation methods or at least classical methods adapted to the new real case requirements have to be defined and developed. One of the most known usability evaluation method is the heuristic one. Many authors have proposed specific set of usability heuristics for particular applications. Nevertheless, new formalisms, methodologies, and documentations have to be developed and adapted to various cases. This paper proposes and experiments a methodology to support the development of new usability heuristics for the parallel and distributed applications. The paper exemplifies the using of the methodology to develop usability heuristics for the grid computing applications.
Keywords: utilisability, usability heuristics, grid computing, distributed applications