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RoCHI Tables of Contents: 040506070809101112131415

Romanian National Conference of Human-Computer Interaction -- RoCHI 2012

Fullname:National Conference on Human-Computer Interaction -- RoCHI 2012
Editors:Vlad Posea; Grigoreta-Sofia Cojocar
Location:Bucharest, Romania
Dates:2012-Sep-06 to 2012-Sep-07
Standard No:ISSN 1843-4460; hcibib: RoCHI12
Links:Online Proceedings | Conference Home Page | SIGCHI Romania Home Page
Interactions in smart environments and the importance of modelling BIBAKPDF 1-12
  Peter Forbrig
One challenge in software engineering is the development of smart environments that help users to intuitively accomplish their tasks. The ideal smart environment dynamically manages a diverse collection of devices, is accessible by multiple users and effectively supports the users' tasks. The design of smart environments relies on detailed models of devices, users and their tasks. In this paper, we present our modelling language "CTML" specifically developed for smart environments. We demonstrate how the language was designed and how it was used for usability evaluations in a virtual smart environment. We then discuss the importance of "task migrateability" -- a usability principle often neglected by contemporary smart environments. We argue that the proper implementation of this usability criterion can improve the usability of smart environments. Finally, we investigate how tangible user interfaces are related to smart environments and how this interaction technique can be used to support task migrateability.
Keywords: supportive user interface, task migratability, smart environment
Note: Issue 2 of RRIOC Vol. 5
A formative measurement model for the motivational value of an AR-based educational application BIBAKPDF 13-18
  Costin Pribeanu
An objective of e-learning systems design is to increase the educational and motivational values. The evaluation of the motivational value of the applications based on the augmented reality technology as well as the evaluation of its relationship with the perceived usefulness and intention to use is a topic of interest. In this paper a new approach for the evaluation of the perceived enjoyment is proposed that is based on a formatively measured construct that is influencing the perceived usefulness and the intention to use. The measurement model is integrated into a structural model that is estimated with covariance structure analysis (CSA). Two AR-based applications (one for learning Biology and the other for learning Chemistry) are used as case studies.
Keywords: motivational value, perceived enjoyment, intention to use, formative index, augmented reality, e-learning
Note: Issue 2 of RRIOC Vol. 5
The evaluation of two Augmented Reality applications for school environment -- Focus group with teachers BIBAKPDF 19-25
  Dragos Daniel Iordache; Ioan Neacsu
In this paper are presented the evaluation results with teachers of added value by economic and psychological adequate utilization of a learning-teaching platform based on augmented reality technology. Two didactical applications developed on this platform in the framework of international project ARiSE have been evaluated. The topic of the first application is biology and the second has been developed for learning chemistry knowledge (atom structure, periodic table). We used the focus group as evaluation method, with two interview guides related to each application.
Keywords: augmented reality, learning scenario, educational platform, focus group method
Note: Issue 2 of RRIOC Vol. 5
Prototypes of human-machine interactions and types of educational applications specific to mobile augmented rReality BIBAKPDF 26-30
  Livia Stefan
The technology of Augmented Reality -- AR stimulates the perception of the surrounding reality by means of innovative and interactive human-machine interfaces. The development in an exponential rhythm of the capabilities of the mobile devices and also the improvement of the algorithms specific to AR, have made these devices integrated and miniaturized platforms for AR applications, and extended their usage not only for academic research but also for commercial purposes. The present paper structures information concerning prototypes of human-machine interactions specific to the paradigm of Mobile Augmented Reality -- MAR and presents usage examples for the design of modern educational applications for mobile devices. The paper presents final conclusions based on author's technology evaluations and development of an AR browser educational application for smartphone.
Keywords: augmented reality, educational applications, mobile education, AR browser
Note: Issue 2 of RRIOC Vol. 5
2D graphical interaction in e-learning BIBAKPDF 31-36
  Andreea Chiscari; Dorian Gorgan
Sketching is often used by people to express ideas. Some concepts that are hard to explain in words can be easily expressed using a figure or drawing. As the pen-based user interfaces became common, many systems that use this type of interaction were built. The traditional methods used in sketch recognition can be grouped into three categories: aspect-based recognition, gesture-based recognition and geometry-based recognition. Although each of these methods has advantages and disadvantages, the geometry-based methods have proved to be the most suitable for building multi-domain recognizers. As an extension to the existing eLearning systems, we propose the integration of a sketch recognition system that can be used in many educational areas. The recognition system supports the user in the drawing process and offers meaningful and relevant information about the recognized concepts. In order to use questions that require a graphical answer, before the system can correctly and automatically evaluate the student's answer and offer immediate feedback, the teacher must provide a reference solution to the problem, the correct/expected answer. The system uses its knowledge, consisting of primitive forms and constraints) to recognize the graphical primitives and the relations between them and compares the student's solution with the one given by the teacher.
Keywords: human computer interaction, e-learning platform
Note: Issue 2 of RRIOC Vol. 5
Experimentation of an acceptance model of e-learning systems BIBAKPDF 37-40
  Alexandru Balog
The aim of this paper is to test a model of acceptance of e-learning systems using the UTAUT reference model. After a brief description of UTAUT model, are described the proposed model and the assumptions, methods used and results obtained from experiments on a sample of students (N = 224). By applying multivariate analysis methods, the results show that the model is viable in the e-learning context in Romania. The model explains 63\% of the variance for the construct "Intention to continue the use of e-learning".
Keywords: e-learning systems acceptance, UTAUT
Note: Issue 2 of RRIOC Vol. 5
Controlling the applications running on a Windows system by means of Android devices BIBAKPDF 41-44
  Cristina Serban; Irina Grosu; Alexandra Siriteanu; Alexandru Averescu; Adrian Iftene
This article presents an application that the authors have developed for the Android platform, which allows a user to remotely control the applications on a computer which has the operating system Microsoft Windows. There are many other applications that have similar functionalities, such as Vectir, PPT Remote, Remote presenter for Android or Tango Remote Control Media Player HD, to name a few. Our application is comprised of two main modules: the client (the application running on the user's smartphone) and the server (the application running on the computer). In addition to these, there are two means of communication between the two modules, based on Bluetooth and Wi-Fi. The Android application (the client) is able to connect with any PC running a server background application. This component offers the user two screens: one that lists the available desktops and the means of communication (Bluetooth or Wi-Fi) and one that lists the applications that the user can control together with the actions available for each of them. The Desktop component (the server) contains three main modules. The Accessible Applications module keeps a list of the applications that can be accessed by the application. It gets this information from an .xml configuration file. The Running Applications module monitors the running processes in the computer. It is its role to notify the client whenever an application is started or exited. By receiving commands from the Android Component, we control applications like Microsoft Power Point and Windows Media Player. The communication consists of passing strings with a certain format between the client (the Android Component) and the server (the Desktop component). The application has been evaluated based on relevant use cases and tests, such as functionality tests, distance tests, stress tests.
Keywords: Android, Windows services, remote control
Note: Issue 2 of RRIOC Vol. 5
Optimizing educational platforms interfaces BIBAKPDF 45-48
  Constantin-Gelu Apostol; Alina-Mihaela Ion; Dragos Vespan
The development of educational platforms for promoting assisted instruction in economic superior learning represents one of the main current concerns of IT specialists and academics. The article analyzes the issues of promoting user interactions with such a platform implemented for the students from the French section of the Faculty of Business Administration from the Bucharest Academy of Economic Studies.
Keywords: CSS3, CMS, mobile devices, adaptive interface
Note: Issue 2 of RRIOC Vol. 5
The development of educational content based on Web services BIBAKPDF 49-54
  Arnold-Mihai Waldraf; Dorian Gorgan
This paper presents the development and the experiments on a Web services based eLearning platform, called eLaWS. The authors describe the concepts and the techniques that support the flexible and dynamical development of educational materials and the improvement of functionality by using a set of Web services. The new functionality is dynamically added by the eLearning platform. The user model, dynamic content lesson models, and communication mechanisms are highlighted and detailed throughout the paper. A few experimental use cases allow the evaluation and the validation of the eLaWS platform.
Keywords: eLearning, Web services, user interaction techniques, educational content.
Note: Issue 2 of RRIOC Vol. 5
Network based analysis of intertextual relations BIBAKPDF 55-64
  Ioan Cristian Ghiban; Stefan Trausan-Matu
The texts are not discrete and closed-off entities and this article gives evidences that the texts are interconnected in various ways. In this sense, taking a glimpse at the research extant in the field of network based analysis of texts, we present the referential and typological intertextuality, some theoretical models for the Small World property, processing techniques for evaluating the interconnection between texts, software projects that study the intertextuality and their results. In the end, two original applications for supervised and unsupervised analyzing of humanistic antique texts are introduced. The first application is using LSA and can find the most frequent words, the most semantically significant ones and also the similarities amongst documents. Therefore, this application is useful in automatic detection of textual interconnections (intertextuality). The second application offers user assistance for commenting a text in terms of its main concepts, automatically harnessing hypertext resources if a certain html format is encountered. This assistance process is helpful in the supervised description and clusterization of texts, also related to intertextuality.
Keywords: intertextuality, social networks theory, natural language processing
Note: Issue 2 of RRIOC Vol. 5
Text-to-Speech synthesis for Romanian language BIBAKPDF 65-70
  Teodor Paul Alin Becan; Dorian Gorgan
This paper aims to challenge the problem of finding accurate and relevant search algorithms in order to obtain the best audio output in terms of intelligibility and naturalness, the usually employed measures to describe the quality of synthetic speech. It presents the approach used for searching the sound components that correspond to a provided phonetic transcription input of the Romanian language in a given acoustic database. We integrate this search module into the Unit Selection component of a text-to-speech system for Romanian language.
Keywords: text-to-speech synthesis, search algorithms, context
Note: Issue 2 of RRIOC Vol. 5
Automatic analysis of self-explanations BIBAKPDF 71-76
  Bogdan Oprescu; Mihai Dascalu; Stefan Trausan-Matu; Traian Rebedea; Philippe Dessus; Maryse Bianco
Self-explanations represent the reader's verbalizations made during the lecture of a text in order to better understand its content. The proposed system is designed to automatically analyze these self-explanations, thus allowing the teacher to assess in detail the understanding level of the read materials; similar implementations exist only for English. This paper briefly presents the application's architecture, the integrated technologies and describes how the assessment of verbalizations has been conducted. The proposed method is based on natural language processing techniques adapted for French and it is targeted at primary school pupils. In addition, during the analysis process we integrated an heuristic at concepts level in order to assess the similarity between the original texts and the pupils' verbalizations.
Keywords: verbalization, SERT, latent semantic analysis, automatic analysis of self-explanations
Note: Issue 2 of RRIOC Vol. 5
Web 2.0 recruiting BIBAKPDF 77-80
  Vlad Posea
The article describes the first steps towards a semantic competence management system. The system is designed to improve the activity of a recruiting company specialized in the IT domain and it uses technologies from the domains of semantic web and web services.
Keywords: semantic web, competences, ontologies, LinkedIn
Note: Issue 2 of RRIOC Vol. 5
Specific usability problems with municipal websites: A case study with five district halls BIBAKPDF 81-84
  Costin Pribeanu; Maria Gheorghe-Moisii; Dragos Daniel Iordache
The usability of websites is an important requirement in the Information Society. Unfortunately, evaluation of software products prior to a public release is not a current practice yet. The purpose of this paper is to present a case study in the formative usability evaluation of five websites from the local public administration. The evaluation results show a low usability due to the lack of a user centered design approach.
Keywords: usability, formative usability evaluation, heuristic evaluation, municipal websites
Note: Issue 2 of RRIOC Vol. 5
Testing a component for learning mathematics with users BIBAKPDF 85-88
  Ion Smeureanu; Narcisa Isaila
The usability and accessibility are considered two major attributes in designing of necessary software for computer assisted learning through assistive technology (for disabled). Assessed separately, most evaluations are the result of researches in usability, which are addressed to all, while for people with disabilities, especially visual, the accessibility is a priority. The strong connection between accessibility and usability is based on the needs of users in achieving some clearly defined objectives so the accessibility of software products should be considered in terms of their use by people with disabilities. The paper aims to present the result of researches conducted in two centers of education for people with visual disabilities, concerning the assessment of software for learning math, according to its accessibility and usability features.
Keywords: mathematics, accessibility, usability, assistive software
Note: Issue 2 of RRIOC Vol. 5
Accessibility analysis of interactive systems using MOM tool BIBAKPDF 89-92
  Paul Fogarassy-Neszly
Accessibility of graphical user interface is a necessary condition for peoples with visual disabilities to use software applications. In order to evaluate the accessibility for a user interface a dedicated software tool is necessary; this should be able to identify as much as possible of any accessibility problem. In this paper several case studies are presented with accessibility analysis using the MOM (Meaningful Object Manager) tools package.
Keywords: accessibility, WAI, MOM, accessibility analysis
Note: Issue 2 of RRIOC Vol. 5
Personas method in the context of semantic Web BIBAKPDF 93-96
  Stefan Negru; Sabin Buraga
Personas is a one of the most used method for gathering and presenting the user preferences in the context of the Human-Computer Interaction. However, a few studies have focused on linking information obtained via the Personas method with other information involved into the product development and testing stages or creating a specific conceptual model. In this article, we consider several Semantic Web technologies such as microdata and RDFa, in order to provide a solution to these issues by proposing a conceptual model for personas (a HTML5 microdata schema).
Keywords: Personas, microdata, semantic web, user modelling
Note: Issue 2 of RRIOC Vol. 5
Team formation using psychological profiles BIBAKPDF 97-102
  Corina Ciubuc; Mihai Dascalu; Stefan Trausan-Matu; Traian Rebedea
Every person is unique because he has different sets of individual traits and characteristics. Taking this into consideration, it is clear that people have different types of personalities, but in the end they manage to understand each other and interact. The words people use in their daily lives can reveal important aspects of their behaviour and psychological worlds. Automatic analysis tools are used by us to quickly assess features of what people say. This way information about some of their psychological traits is obtained. The motivation of this article started with the following simple question: is it possible to recommend a person to a small team formed by students, knowing her psychological profile, obtained by analyzing the words she is using in her daily life? The purpose of this writing is to present an elaborated method of recommending a new member to a team, where various team formation heuristics are used, as well as a collaborative filtering recommending system.
Keywords: psychological profile, team formation, text mining, MBTI model, latent semantic analysis
Note: Issue 2 of RRIOC Vol. 5
Mood and sentiment assessment using latent semantic analysis BIBAKPDF 103-108
  Diana Lupan; Mihai Dascalu; Stefan Trausan-Matu; Traian Rebedea; Philippe Dessus; Maryse Bianco
The analysis of written communication can reveal subtle information, such as speaker's emotional state, attitude and intentions. However, these cannot always be extracted accurately, at a level comparable to humans' abilities. Extracting emotions does not only reveal information about the speaker, but can also anticipate what effect might the text have on the person who reads it. Therefore we propose an automatic method for analyzing emotions induced by texts, more specifically a reader's most likely emotional state after reading a news article. In order to achieve this, we combined a context independent approach (analyzing the text that is read using natural language processing techniques) with the influences of user's current emotional state evaluated through his/her feedback.
Keywords: emotional state, mood assessment, latent semantic analysis, automatic analysis of news articles
Note: Issue 2 of RRIOC Vol. 5
Evolutionary social network analysis of Web-based educational environments BIBAKPDF 109-112
  Andrew Laghos
This research provides a different perspective to analyzing the social networks that are formed in online learning environments. The novelty of this study lies in the investigation of the evolution of the online social networks as opposed to most current research which focuses only on the end state of a course when analyzing its computer-mediated communication. These educational social networks continually evolve and change over time, thus a method which can be used to assess their evolving nature is necessary. The contribution of this paper to the HCI community is the recommendation of Evolutionary Social Network Analysis as a method for studying students' communication interactions with each other during the duration of an online course. In the approach followed, the proposed method was applied to a case study and the results show that it can be a useful tool for researchers and educators in studying evolving social networks.
Keywords: social networks, evolution, analysis, web-based education
Note: Issue 2 of RRIOC Vol. 5
An analysis of the quality and accessibility of suicide information available to the Romanian-speaking user BIBAKPDF 113-116
  Ana Maria Marhan
As the potential impact of Internet use on suicidal behaviour is currently under questioned, experts have yet not conclusively ruled on the extent of this problem. At the moment, no one really knows what kind of information is exposed to a disturbed individual while surfing the web, nor how difficult is for a typical Romanian Internet user to find suicide-related information. Hence, this paper aims to initiate a discussion on some basic issues related to the quality and accessibility of suicide-related information available to the Romanian-speaking user, as a prerequisite in harnessing the potential offered by Internet technologies in prevention, but also intervention in suicide-related cases.
Keywords: Internet, suicide, information, quality
Note: Issue 2 of RRIOC Vol. 5
Interactive video interface for embedded systems BIBAKPDF 117-120
  Dan Rotar; Dragos Andrioaia
This paper presents an original solution to display information on embedded systems by generating a composite video signal. For simplicity, this signal is generated without the use of additional circuits. At present such a solution is based exclusively on a software building the required time durations necessary for the display of the image. The solution proposed in this paper is based on a combined software and hardware solution. Thus, the microcontroller module for pulse width modulation (PWM) is used for the duration of time, and the displayed line is controlled by software. This paper presents two types of interfaces also made: an interactive video interface provided with optical pencil and an interactive video interface provided with touch panel. The advantage of video interface presented in this paper is to simplify and shorten design cycle times, increasing its portability and flexibility.
Keywords: video interface, optical pen, touch screen, real-time operating, modulated pulse width, interrupt
Note: Issue 2 of RRIOC Vol. 5
Face recognition based authentication on mobile BIBAKPDF 121-124
  Julia Kovacs; Dorian Gorgan
This paper presents the implementation of a face recognition method and testing techniques on mobile phones with Android operating system. The method is based on the Eigenfaces algorithm, which allows variations of face expressions. The Eigenfaces approach is often used because of its simplicity of implementation and learning ability, there is no need of specific geometry or explicit descriptions of the face. The performance of the algorithm is experimentally evaluated by calculating the correct and false acceptance rate and the correct and false rejection rate. The algorithm is implemented as a Web Service whose methods are called from an application, developed for mobile phones with Android operating system.
Keywords: face recognition, eigenfaces, Android mobile phone
Note: Issue 2 of RRIOC Vol. 5
Labview interfaces used to generate the waveforms and data files specific of electrical switching devices tests BIBAKPDF 125-128
  Marinel Popescu; Constantin Iancu
The paper presents some aspects of activity in laboratory for testing the power electrical switching devices and electrical equipment. The main elements of assemblies made for testing, physical quantities measured and recorded and used transducers are presented. The purpose of this paper is to present a simple way for interactive generating and visualization of recorded quantities during operation in transient of power switching devices. The work is aimed at students of electric faculties and offers the starting point and necessary support to develop specific means for self-study of the electrical dynamic regimes. As a novelty, the paper highlights the way for interactive generation of waveform and data files. It also allows the interactive analysis and visualization of parameters obtained.
Keywords: switching devices, phases, interactive interface, synthetic signals
Note: Issue 2 of RRIOC Vol. 5
Description of satellite images processing in Greenland application BIBAKPDF 129-134
  Danut Mihon; Vlad Colceriu; Angela Minculescu; Victor Bacu; Dorian Gorgan
Our society needs and environmental predictions encourage the applications development, oriented on supervising and analyzing different Earth Science related phenomena. This paper experiments new methods in satellite images processing throughout the GreenLand application. Visual descriptions of these methods represent one of the main objectives of this platform, new features and concepts being defined for this purpose. GreenLand facilitates the complex workflows (called hyper-graphs) development, based on two editor tools. The gProcess and ESIP (Environment Oriented Satellite Data Processing Platform) platforms have an important role in their development, by providing services for workflow creation and management. Due to large volume of data that need to be processed, the GreenLand operators and workflows are executed over the Grid infrastructure. This platform offers high storage and computing resources, capable of applying parallel and distributed execution techniques.
Keywords: satellite images, GRID processing, graphs, GRID infrastructure, processes description, interaction techniques.
Note: Issue 2 of RRIOC Vol. 5