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RoCHI Tables of Contents: 040506070809101112131415

Romanian National Conference of Human-Computer Interaction -- RoCHI 2007

Editors:Dorin-Mircea Popovici; Ana Maria Marhan
Location:Constanta, Romania
Dates:2007-Sep-21 to 2007-Sep-22
Publisher:Matrix Rom
Standard No:ISSN 1843-4460; hcibib: RoCHI07
Links:Conference Home Page | SIGCHI Romania Home Page
Pseudo-Haptic Feedback: Simulating Haptic Feedback without Haptic Devices BIBAK 1-6
  Anatole Lécuyer
This paper gives an overview of recent and past research on pseudo-haptic feedback. Pseudo-haptic feedback is a technique meant to simulate haptic sensations without using haptic interfaces. Pseudo-haptic feedback uses visual feedback and properties of human perception to generate some kind of haptic illusions. The document describes several experiments and applications in which properties such as stiffness or textures were simulated using a pseudo-haptic feedback.
Keywords: Pseudo-Haptic, Texture, Stiffness, Illusion, Training, Control/Display ratio
IONS-VIP: a cognitive model for navigating the Web via screen readers BIBAK 7-16
  Ion Juvina
This paper presents a cognitive perspective on the problem of using the Internet via screen readers. An empirical study shows similarities and dissimilarities between using the Internet via screen readers and via the standard graphical screen. In particular, spatial cognition is an important determinant of web task performance even in the absence of any visual cues. Backtracking behavior has a higher cost and impacts performance in a more negative way when using the Internet via screen readers as compared to the standard use. Selective reading can be used as an addition to the existing functionality of screen readers but more research is needed to prove the utility of such support mechanism. Computational cognitive modeling can be used in conceiving, testing and implementing cognitively informed support functionality in screen readers.
Keywords: Web navigation, Web accessibility, visually impaired persons, cognitive modeling
EngView -- virtual environment for training in industry BIBAK 17-22
  Dorin-Mircea Popovici; Remus Zagan; Petre Petculescu
By considering the improvement of educational process regarding the student assistance and motivation for a successful professional integration, the proposed platform, EngView, extends the real set-up, currently used in students training in industrial field, by a flexible training virtual environment, that open the trainees access to experimental data, reduces the educational costs and increase the educational process quality. The EngView implementation offers an interactive shared virtual environment, agent-oriented and that uses the virtual reality technology.
Keywords: Virtual reality, education, training
Dynamic gestures recognition: methods for hand movement detection and recognition BIBAK 23-26
  Delia Mitrea; Sergiu Nedevschi; Dorian Gorgan
In this paper we present and analyse the existing methods for dynamic hand gestures characterization and recognition and we also propose our own method for solving the dynamic hand gestures recognition problem. Another subject of interest for this paper is the detection of objects in movement, the case of hand movement being taken in consideration. We describe the methods available nowadays for dynamic gestures recognition and also our own methods concerning the characterization and recognition of dynamic hand gestures. For further development, we propose the improvement of this method by using methods like the Wavelet Transform and the 3D appearance models for the detection of the most subtle differences between the gestural trajectories. We propose a solution that takes into consideration all the important aspects that characterize each hand posture in the context of a dynamic gesture, which is also efficient from the speed point of view.
Keywords: Natural interaction, dynamic gesture recognition, gestural trajectory, shape, orientation
Multimedia Content Adaptation and Personalization BIBAK 27-30
  Adriana Reveiu; Ion Smeureanu
The multimedia data representation supposes to identify the most important characteristics for multimedia content representation and for representation of characteristics needed for multimedia data attributes coding. Multimedia content adaptation supposes to manipulate multimedia resources in distributed applications respecting quality specifics parameters, but keeping into account about the limits imposed by the network broadband width and by the peripheral devices characteristics. Multimedia data could be delivered in various networks or could be played using various kinds of peripheral devices, in a format adequate to the technical condition of each user. Content personalization supposes to adapt the functionality of services based on the specifics requests or conditions of each user, based on communication channels size and based on terminals used for content adaptation or content filtering. The most important effects are obtained by adaptation of multimedia information because of their specifics. The paper proposes a solution for computer-users interaction that assures the adaptation and personalization of multimedia content.
Keywords: Multimedia content, multimedia content adaptation, content personalization
Using the discriminate analysis for speech recognition BIBAK 31-34
  Titus Felix Furtuna; Marian Dardala
In the newest type of society, I mean Information Society usage of computers becomes a necessity. Thus, all people have to be able to use it. In this circumstances the human -- computer interaction has to be accessible for all users. The classic interaction system is not sufficient for people with disabilities thus to solve this problem is necessary to create alternative interfaces. People with visual disabilities require interfaces based on vocal commands and which present the visual content using vocal signal. The operation systems besides many others software packages include the software components for accessibility but the main problem is that the most of all software products use the vocal interaction using English language. The software solutions for accessibility based on the vocal signal become useful in order to realize the social inclusion in the Romanian cultural space.
Keywords: Vocal recognition, Bayesian discrimination, vocal signal, words separation, sample
Web Navigation Assistant based on Microformats BIBAK 35-42
  Anca-Paula Luca; Sabin-Corneliu Buraga
The selection of most interesting Web documents with respect to user needs must be automatically performed in many situations. This type of activity requires the understanding by the machine of the human defined semantics via semantic mark-ups (e.g., microformats). The goal of the presented project is to develop a tool able to understand the user behaviour on the Internet, in a non-intrusive manner by using actual machine learning approaches and Web technologies.
Keywords: Microformats, user assistant, web interaction
A new software tool for business process diagram design BIBAK 43-46
  Cristian Dumitru Masalagiu; Vasile Alaiba
The paper describes an approach to design and analysis of business processes, using a new software tool. Business analysts can use a simple specification language (BPMN -- Business Process Modelling Notation) to describe all types of possible activities within a company's business process (modular and concurrent). The programs associated to this language (BPD -- Business Process Diagram) will be mapped to another language (BPEL4WS -- Business Process Execution Language for Web Services) and executed.
Keywords: Business processes, BPMN, BPD, BPEL4WS, software tools
Virtual Reality technologies applied in Computer Aided Design BIBAK 47-50
  Florin Gîrbacia
On current CAD software, most of editing commands are issued with the aid of 2D mouse, keyboard and widgets. Such interactions do not fit in Virtual Environments (VE). In this paper a multimodal interface based on Virtual Reality (VR) technologies used as an alternative to the classical interface that uses 2D display, keyboard and mouse is presented. Users can create and modify 2D and 3D objects using 6DOF tracking device, voice commands, gestures and visualize the design status in an immersive CAVE-like system. An evaluation study was conducted investigating the design process for a sample part which illustrates the intuitive and natural way of interaction with the CAD model.
Keywords: Virtual Reality, Multimodal interaction, CAVE, Computer Aided Design
Portal value chain creation BIBAK 51-54
  Cristina Niculescu
The paper presents different portal types with their characteristics, functions and architectures, the accent being on the knowledge portals. It is delivered the definition of the value chain and it is exemplified in the case of portals' development. A portal is a Web application that provides personalization and content aggregation from different sources and it hosts the "presentation" level of information systems. Portals can use portlets, as components for the user interface. The portal classification may be done in function of user groups, content or functions. The knowledge portals are web interfaces of the systems that implement knowledge strategies of the organizations. The tendency is of integration of different portal types. In the portal value chain, the companies have to rethink the way of perception of clients and providers. Instead of encouraging companies in information protection, the procedures of trusting promote forms of sharing information for the members of the value chain and they can take adequate decisions.
Keywords: Knowledge portal, Knowledge Management (KM), portlet, value chain
Usability Measurements on Graphics Annotation Techniques BIBAK 55-60
  Teodor Stefanut; Dorian Gorgan
Graphical annotation on the documents provides the user with much more freedom in the creative expression. The scientific literature reports mainly graphical annotation on documents of various formats. This paper presents some experiments on the graphical 2D annotation techniques in the context of eLearning lessons. It is presented as well a comparative analysis of the measurements on the mouse and pen based annotation techniques.
Keywords: Graphics annotation, graphical user interfaces, interaction techniques, usability, usability measurement, eLearning
Web interfaces for people with disabilities BIBAK 61-64
  Ionut Petre; Dragos Marian Smada; Laura Ciocoiu
One of the main characteristics of the world that we live in is the access to information and one of the main ways to reach the information is the Internet. Most Internet sites put accessibility problem on a secondary plan. If we try to define this concept (accessibility) we could say that accessibility it's a way to offer access to information for the people with disabilities. For instance, blind people can't navigate on the Internet like usual people. For that reason Internet sites have to put at their disposal ways to make their content known to this people. Accessibility does not refer only at blind people the web accessibility refers to all people who lost their ability to access the Internet sites. The web accessibility includes every disability that stops people with disabilities to access the web sites content like hearing disability, neurological and cognitive. People that have low speed Internet connection or with low performance computers can use the web accessibility.
Keywords: Accessibility, Adaptability, Adaptable interfaces, Interactive database
The Romanian adaptation of the Intranet Satisfaction Questionnaire An application into a Romanian bank BIBAK 65-68
  Horia D. Pitariu; Daniela Onaca; Mihaela Popa; Adriana Tarta
This paper describes the adaptation and validation process of the Intranet Satisfaction Questionnaire for the Romanian population. This project makes Romania the 7th country to adapt and test this extremely useful and easy to use assessment instrument. Data obtained on a 66 bank employees sample indicate that the adaptation process was successful. The internal consistency for the Romanian version of the questionnaire demonstrated values very close to the original version and we also found a good convergent reliability. Divergent reliability still needs to be investigated further. Final results indicate that in the banking sector technology characteristics related to the functional aspects (relevant information, rapid access) will prevail over the others (communication, help, personalization, self-expression). The functional characteristics will ensure a high level of satisfaction with the technology in use. Data also indicate the implication of other organizational variables related to technology and these will make the subject of our future research in this area.
Keywords: Intranet, Satisfaction, Usability, Organization, Technology
Aspects regarding the Voice Component of an Integrated System for Mobile Users BIBAK 69-72
  Emil Stanescu; Ileana Stanescu
In our paper we depict some aspects about voice component of "An integrated system for mobile user". That system aims at integration of some technologies which to allow to an mobile user to get information he desires, in concordance with his profile and context. Voice component enables voice or multimodal interaction with information server which provides services for mobile user. From many development approaches of voice component, we prefer one that is based on the Microsoft Speech Server, because it has support for development, for integration of telephony, and for testing of software applications.
Keywords: VoiceXML, SALT, TAPI, voice server
Cognitive effects of error messages BIBAK 73-78
  Laurentiu P. Maricutoiu
The present study is trying to identify the impact error messages have on user cognitive performance in the immediate task after the error message. In order to reach our objective, 61 subjects were grouped in four experimental conditions. The subjects' task was to complete a computerised version of an intelligence test which, depending on the experimental condition, generated a error message. The results showed that user cognitive performance is lower in the task after the error message, when compared with the control group. This fluctuation seems to be related with the error message type and with user's tendency to experience anxiety.
Keywords: error message, cognitive performance, anxiety
Collaborative analysis of source code snippets using SVG technologies BIBAK 79-82
  Stefan Ciobaca; Manuela Grindei
In this paper we present a method to share a source code snippet, with the purpose of discussing it with others. The method uses the Django platform on the server-side and AJAX+SVG on the client-side to facilitate the communication among users.
Keywords: SVG, code snippets, syntax highlighting, collaborative editing
The diversity of the psychological processes and states having a stimulative and regulatory role in computers utilization for visual impairments users BIBAK 83-86
  Verginia Cretu; Adrian Plop; Florin Georgescu
The paper presents some results gained in objective II.2 "Study to establish the specific need of the visual impaired PC users" from 111/2005 CEEX Program, especially those regards to interests and needs of visual impaired PC users towards assistive technology. The main need of the visual impaired users of assistive technology is related to creation of an accurate Romanian screen reader. With the same importance are the conclusions about the motivational factors, the diversity of processes and psychological states with a stimulative and regulatory role on these needs for assistive technologies.
Keywords: Assistive technology, interests, personal factors, needs, needs of support
Adaptable Interfaces Application BIBAK 87-90
  Dragos Nicolau; Dragos Catalin Barbu; Laura Ciocoiu
This paper describes a multimodal interface used within processes of taking decisions in different fields of activity such as economic, financial and engineering. The article aims to describe the main interface features which allow the setting of data and restrictive conditions that are involved in finding the optimal solution. Interface elements insure the interaction cu knowledge database as well as memorizing of optimal solution(s).
Keywords: Adaptable interface, knowledge base
Psychological Profile of the Informational Technology User with Visual Impairments BIBAK 91-94
  Mihaela Sterian; George Gojgar; Adrian Plop; Marian Padure; Silviu Ghioc
The paper present the results that have been obtained further to a study performed and that had as a main objective a psychological profile for IT users with visual impairments. The psychological tests, CAS and NPQ, non-verbal personality questionnaire, were applied to a number of 50 subjects with visual impairments. The specific fields of interests of the IT users with visual impairments are in most cases the same but there are differences too. The group profile can be used as a default psychological profile for all the IT users with visual impairments.
Keywords: User profile, assistive technology, NPQ
Educational and motivational aspects of the video games BIBAK 95-98
  Dragos Daniel Iordache
Learning of educational content is often a difficult process which requires a sustained effort from students for understanding, assimilation and development of new skills. This paper aims at emphasizing the potential contribution of the video games to the development of an engaging and immersive learning environment. In this respect we present several paradigms of the relation entertainment -- education and a synthesis of the main educational and conation aspects of the video games.
Keywords: Entertainment, motivation, video games
Flow in human-computer interaction BIBAK 99-102
  Ana Maria Marhan
Flow is a state of consciousness where people become totally immersed in an activity, and enjoy it intensely. According to (Csikszentmihalyi, 1997), such an optimal experience can emerge into a variety of activity situations, using computer technology being included here. In this paper we intend to discus the concept of flow and the main characteristics of this optimal psychological state experienced by the computer user. After a review of the research in this area, some of the main factors facilitating, or blocking the optimal experience of flow in the context of human interaction with computer technology are presented and discussed. These factors may support the design of human interfaces that encourage user learning, exploratory behaviour and positive affect.
Keywords: Flow, task challenge, awareness, control
Media, multimedia, hypermedia: learning memory overload in e-learning environments BIBAK 103-110
  Alexandru D. Iordan
The paper presents the main empirically founded theories regarding the restrictions imposed by the limited capacity of the working memory in the integration and comprehension of information presented in a multi/hypermedia context. The working memory represents an important psychological concept which must be taken into account when the cognitive constraints in the use of multimedia systems are considered. Research conducted in both instructional and cognitive psychology domains reach similar conclusions: in order to succeed, the systems must be adapted to the cognitive limitations of the user and especially to those of his or hers working memory. Finally, it results that the working memory, a limited storage system in terms of its capacity and durability, is a necessary component for any model or theory which tries to describe and explain how users integrate multiple sources of information.
Keywords: multimedia, working memory, e-learning
Tool support for computer-aided design of operational level tasks BIBAK 111-114
  Costin Pribeanu
The model-based approach could be seen as a progressive derivation of user interface components from representations expressing relations between users, tasks, domain, environment, and technology. The success of this approach depends on the ability to solve the mapping problem, i.e. establishing and maintaining of links between models. This paper is presenting a set of mapping rules between task and domain models and a tool supporting the automate derivation of task model fragments from the domain model.
Keywords: Model-based design, task-based design, computer-aided design tools, design patterns
Methodological aspects of distributed cognitive task analysis and evaluation BIBAK 115-122
  Ana Maria Marhan
The paper presents a heuristic task evaluation method, based on the concept of distributed cognitive task. The evaluation process involves a decomposition of the task in its component subtasks, and then studying the properties of the representational objects manipulated in at each level tasks. A third step identifies the impact a specific representational object may have on the (sub-) task performance (either success, or failure).
Keywords: Distribute cognitive tasks, heuristic evaluation, deviation analysis
The culture of colour in user interface design BIBAK 123-128
  Cornelia Melenti; Dorian Gorgan
The paper presents the results of a study involving a group of human subjects from the domain of computer science and information technology. The study especially involves user interface developers and concerns with the knowledge evaluation on the colours and their meanings. A questionnaire based on usual known colours and their definitions in different colour dictionaries has been developed. The measurements are presented graphically as diagrams and the results are explained in the text as well. The paper presents a classification of the colour application domains (colour context), and a colour dictionary in Romanian, correlated with other language colour dictionaries based on the colour names accepted in HTML and CSS. The paper highlights the different definitions given by authors in various dictionaries for the same colour.
Keywords: Color dictionary, Web design, color context
Improvement of a method for computing the rank of recommendations considering users' satisfaction BIBAK 129-132
  Vlad Hosu; Stefan Trausan-Matu
The paper proposes a method for computing the ranks of recommendations. These are used for sorting a large collection of images in order to maximize the satisfaction of users. The paper will prove that a method based on the PageRank algorithm is better than other methods used now on web sites providing similar services.
Keywords: Collective filtering, image sorting, users' satisfaction, page rank
User Management Improvements in Moodle BIBAK 133-136
  Elena Bautu; Andrei Bautu
This paper presents the motivation, the objectives and the activities to be done in order to improve the user management system in Moodle -- an open-source Course Management System (CMS). The main purpose of these improvements is to increase administrators and teachers productivity in situations with large number of students and highly dynamic sites. This project is among the accepted projects in the Google Summer of Code 2007 competition under the name "User Management Improvements".
Keywords: Moodle, user management, improvements
Learner Model -- key element in the e-learning systems personalization BIBAK 137-140
  Ileana Trandafir; Ana-Maria Borozan
In this article are described some theoretical and practical aspects regarding the personalization of the services and content provided in an e-learning environment. The main mechanism for the personalization achievement is based on: (1) learner model specification, taking into account the personalization aimed levels, and (2) the correlation, in the design phase, of the educational content model (learning objects metadata) with the learner model. This approach is the result of the acquired experience in the frame of the project "Innovative System for Personalized and User-centred Learning with Application to Project Management -- SinPers" (http://www.ici.ro/sinpers/) from the Research of Excellence Program, developed by a consortium composed by the National Institute for Research and Development in Informatics -- ICI Bucharest and the Academy of Economical Studies.
Keywords: e-learning, personalization, learner model, learning objects, learning styles
Course Builder -- an application for creating "related" courses BIBAK 141-144
  Gabriela Pavel; Mihaela Brut
In this article, we expose a domain-independent course management system -- CourseBuilder --, which enables to correlate a course with other materials based on the concepts defined inside these. The concepts are organized into an ontology based on the ACM classification system. The main advantage for students is the accessibility of materials (belonging to different disciplines and teachers) which treat a certain concept. By thus, there is provided the possibility of making correlations between various disciplines. In addition, the system enables the course creation in the form of Web multimedia presentations, stored in the XHTML+TIME language format, without asking programming competences to the users.
Keywords: Ontologies, semantical relations, Web applications, e-learning
Augmented reality for school environments -- preliminary evaluation results regarding the usability evaluation BIBAK 145-150
  Dragos Daniel Iordache; Costin Pribeanu
Although the technologies based on augmented reality have been significantly developed, the number of the educational applications is relatively low. Also, although nowadays there is a significant number of evaluation methods targeting e-learning applications, very few of them have been adapted for usability evaluation of educational AR-based systems. (Augmented Reality). This paper is focusing on some preliminary evaluation results regarding the usability evaluation of an augmented reality system for school environments developed in the European project ARiSE (Augmented Reality for School Environments).
Keywords: Augmented reality, usability, e-learning
Visualisation of learners' contributions in chat conversations BIBAK 151-158
  Traian Rebedea; Alexandru Dragan; Catalin Alexandru; Stefan Trausan-Matu
In this paper, it is presented a novel approach, based on natural language analysis and on visualisation, used for the assessment of the contributions of the participants in a instant messaging (chat) conversation. Bakhtin's dialogistic paradigm provides a polyphonic perspective, based on a multi-voiced interpretation of chat conversations. Natural language processing using the WordNet lexical ontology and semantic distances is used for detecting the main topics in the chat and their threading, and for computing and visualising the contribution of each participant in the chat conversation.
Keywords: Computer Supported Collaborative Learning, Natural Language Processing, Dialogism, Chat Conversations, Ontologies
System for Managing the Idea Flow in Web Conversations BIBAK 159-164
  Vlad Posea; Stefan Trausan-Matu
The paper proposes a new collaborative tool for debates. The tool is based on Toulmin's argumentation's theory and offers a new way to arrange and link the ideas that appear during an online debate. The tool is implemented using WebML -- a XML based language for web modelling and WebRatio a CASE tool for developing data intensive web applications. The paper discusses the existing collaborative tools, their good and bad parts, and further proposes a way for improving the collaborative debates. Then it describes the WebML language and the WebRatio tool and presents the way the actual debate tool was built. Finally conclusions and further research directions are presented.
Keywords: CSCL, argumentation theory
Polyphony, a knowledge-based chat system for collaborative work BIBAK 165-170
  Alexandru Gartner; Alexandru Rosoiu; Ciprian Onofreiciuc; Stefan Trausan-Matu
Within this paper we present Polyphony, an advanced chat system, which makes use of knowledge-based artificial intelligence techniques for supporting collaborative work. The main differences between Polyphony and other chat systems will be pointed out while underlining the improvements introduced by our solution both at the visualization level and at the knowledge level.
Keywords: Chat, collaborative work, recommender systems, knowledge, XML databases
The evaluation of electronic services in public sector BIBAK 171-176
  Alexandru Balog
This article describes the e-ServEval evaluation system of the on-line public services quality. It is presented the general context and the characteristics of the electronic services, the development and maturity levels of the on-line public services, the approaches concerning the evaluation of the services. It describes the system architecture, it's components and primary functions including the technological options and the categories of users.
Keywords: Usability, on-line public services, quality evaluation
A diagnosis orientation system interface in alternative medicine BIBAK 177-180
  Cristina Simona Alecu; Lavinia Nanu
The paper presents a system developed for diagnosis and treatment assistance in alternative medicine, based on traditional Chinese methods. The system, named CompAc (from "Computerized Acupuncture"), is a result of an interdisciplinary cooperation and is designed for the physician, specialist in acupuncture. CompAc allows the determination of the type of energetic imbalance starting from the clinical picture of the patient. The system performs diagnosis assistance and provides the indication of different variants of treatment in acupuncture, acupressure, phytotherapy and microsystems. CompAc can be also a useful tool for medical training. The system interface has been developed in order to provide two main functions: (1) Consult the information in the database; (2) Perform diagnosis and treatment assistance. CompAc is used in some clinics in Romania. The system's value consists in the great amount of information stored in the database, the flexibility of the correlation between data and the ease of use.
Keywords: Acupuncture, diagnosis assistance, treatment
Knowledge Management via a Wiki Platform. Aspects regarding User Interaction BIBAK 181-184
  Sabin-Corneliu Buraga; Marta Gîrdea; Sergiu Dumitriu
The paper presents a wiki-like collaborative system used for knowledge management. We briefly describe the platform architecture and we illustrate various aspects regarding the user interaction.
Keywords: Collaborative platform, Web interaction, Knowledge management, Social Web
Customisation and Comparison of the Activity, Service and Request Semantics in Service-oriented Processes BIBAK 185-188
  Alexandra Galatescu; Taisia Greceanu; Cristian Neicu; Doina Enache
During the generation of a complex process (e.g. business, marketing, procurement process), for each activity in the process, the most appropriate service must be discovered, depending on its semantics and on the user's preferences expressed in his request. Service semantics can be enhanced either after the service publishing (by the service annotation), or before publishing (by the service definition based on ontologies). In either situation, usually there is no explicit criterion for the concept selection (during the annotation or service definition from scratch) and for the semantic comparison of the services and requests. This criterion exists only in the designer's mind. The explicit criterion proposed in this paper for enhancing the service semantics and for their semantic compatibility with the request is the use of the activity semantics as conceptual common base for the service definition and request composition. The paper proposes the use of semantic templates for activities, for the activity-specific requests and for the services discovered and invoked for executing the process activities. The goal of the proposal is the minimization of the unsuccessful service discovery due to the semantic incompatibilities between services and requests.
Keywords: Service-oriented processes, service discovery, semantic templates for activities, services, requests