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RoCHI Tables of Contents: 040506070809101112131415

Romanian National Conference of Human-Computer Interaction -- RoCHI 2010

Fullname:National Conference on Human-Computer Interaction -- RoCHI 2010
Editors:Costin Pribeanu; Adriana Elena Reveiu
Location:Bucharest, Romania
Dates:2010-Sep-02 to 2010-Sep-03
Standard No:ISSN 1843-4460; hcibib: RoCHI10
Links:Online Proceedings | Conference Home Page | SIGCHI Romania Home Page
Patterns of HCI Design and Design of Patterns BIBAKPDF 1-6
  Ahmed Seffah
User interface design patterns also called HCI or interaction or usability patterns have been introduced first as a medium to capture and represent solutions to users' problems. Patterns have been used also as a medium for transferring the expertise of HCI designers and usability professionals to software engineers, who are usually unfamiliar with UI design and usability principles. Design patterns have been considered also as a lingua franca for crossing cultural and professional barriers between different stakeholders. Several HCI professionals have introduced their own pattern languages with specific terminology, classification and meanings. Patterns have also been presented as building reusable blocks at different levels of granularity, which can be combined to compose new interactive systems. Despite the obvious and acclaimed potential of these pattern-driven design approaches, patterns usage has not achieved the acceptance and widespread applicability envisaged by pattern pioneers such as Christopher Alexander. This paper provides an analysis of the facts about patterns usages, pattern languages and pattern-based design approaches. Some shortcomings in the presentation and application of HCI patterns are identified and discussed under the prevailing fallacies. Based on the analysis of how patterns have used so far, we draw some recommendations and future perspectives on what can be done to address the existing shortcomings. Making patterns more accessible, easily understandable, comparable and integratable in software and HCI design tools can promote HCI patterns to claim the usability, usefulness and importance originally envisaged for the pattern-oriented design approach.
Keywords: design patterns, pattern-oriented design, human-computer interaction, design methods
The Pedagogical Usability -- Methodological and Practical Considerations BIBAKPDF 7-10
  Ana-Maria Borozan; Ileana Trandafir
The paper presents some specific aspects of the usability of web-based e-learning systems, focusing on the concept of pedagogical usability as a quality feature distinct from general usability. There are briefly analyzed aspects as scope, learning process, content, tasks, learner variables, interaction with users, results evaluation and their implementation in SinPers project (Innovative system for personalized and user-centered learning, with applications to project management). As will be seen below these seven aspects were considered since the requirements specification and design, and were implemented progressively as the system was built.
Keywords: pedagogical usability, e-learning, personalization
Software for Access Of Persons with Disabilities to Scientific Content BIBAKPDF 11-14
  Ion Smeureanu; Narcisa Isaila
For people with visual impairments, especially for the blind persons, the access to scientific content raises issues of accessibility both to reading web documents, which contain specific elements of mathematics as images, with or without alternative text and reading from files containing mathematical expressions. The utility of applications for synthesis of artificial language from a text (the mathematical expressions are converted into textual form using editors) written in Romanian language is undeniable, given that increased the concerns for the creation of facilities designed to contribute to a better integration of persons with disabilities in society.
   The purpose of this paper is the result of research in education field, namely the access to science, integrating the facilities audio presentation of information.
Keywords: accessibility, mathematics, vocal synthesis
Testing With Visual Impairment Users of a Local Public Administration Web Site BIBAKPDF 15-18
  Iulian Lesneanu; Dragos Daniel Iordache
Accessibility and usability are two concepts which evolved together, usability being associated with ergonomics (especially cognitive ergonomics) of the user-interfaces and accessibility being associated with the not discriminative access to information technology. In this paper are presented the results of testing with visual impairment users of a local public administration Web site. The user testing goal was the identification of the main usability and accessibility problems the blind users are dealing with.
Keywords: user testing, TAP, accessibility, usability
MOSpy -- Software Instrument for Accessibility Analysis of Graphical User Interfaces BIBAKPDF 19-22
  Paul Fogarassy-Neszly; Iuliu Szijjarto
This paper present a software instrument dedicated for Graphical User Interfaces accessibility analysis. The presentation is realized through a case study presenting the way this instrument works. There are presented some accessibility deficiencies for the analyzed application and recommendations for accessibility improvement.
Keywords: accessibility, affordability analysis, screen reader
A Case Study in Formative Usability Evaluation Of a Local Public Administration Web Site BIBAKPDF 23-28
  Dragos Daniel Iordache; Ruxandra Dora Marinescu; Maria Gheorghe-Moisii; Costin Pribeanu
Usability of local public administration web sites should be a key concern in the implementation of the Information Society in Romania. Unfortunately, usability evaluation is not yet a current practice. The purpose of this paper is to present a usability evaluation methodology and a case study targeting a local public administration web site. The evaluation procedure is based on two methods: heuristic evaluation and user testing. A heuristic evaluation was performed against a set of 24 heuristics. Then a user testing was carried on that was based on the think aloud protocol. The evaluation results obtained with each method were analyzed as regarding their confidence and validity.
Keywords: usability, formative evaluation, heuristic evaluation
Facial Expression Recognition Based On Computer-Vision Specific Methods BIBAKPDF 29-32
  Delia Mitrea; Sergiu Nedevschi; Dorian Gorgan
The paper proposes a study regarding the methods of abstract specification for a game user interface by using UsiXML and UIML descriptive languages. Certain aspects about the model-based interaction in the context of CADUI (Computer-Aided Design of User Interface) and the effective use of the modelling tools are presented.
Keywords: abstract specification, modelling, description language
Principles Of Olfactory Human-Computer Interfaces BIBAKPDF 33-36
  Iulian Popescu
This work represents a foray into digital representation problems odors, but also specific aspects of human-computer interfaces smell.
Keywords: olfactory interfaces, odor digitization
User Interaction Techniques Regarding Satellite Image Processing -- Greenview and Greenland Exemplification BIBAKPDF 37-44
  Danut Mihon; Victor Bacu; Teodor Stefanut; Dorian Gorgan
Environmental applications have an increasing role in the modern society and in the life of human kind, through the services they offer (e.g. meteorological prediction, weather forecast, etc). Unfortunately most of the natural phenomena prediction models work with large sets of parameters and unknown values that have to be calibrated. This operation is high computing power consuming, because of the large volume of data needed to be processed. GreenView and GreenLand are two environmental applications that use Grid infrastructure for the execution phase. The interactive interface of the two applications facilitates their usage, by hiding from the user the internal complexity of the Grid processing. GreenView and GreenLand offer the user different HCI (Human Computer Interaction) techniques regarding the monitoring of the temperature distribution and vegetation growth distribution over worldwide geographical areas.
Keywords: interaction techniques, usability, interpolation algorithm, environmental applications
R³ -- A Configurable Input Device for Free-Space Interaction BIBAKPDF 45-50
  Daniel Cernea; Achim Ebert; Andreas Kerren; Valentina Morar
Nowadays, a variety of input devices support 3D interaction by offering 6 degrees of freedom (DoF). Nonetheless, such devices that are available for free-space usage (i.e., without the need for a surface as reference system) are rarely intuitive and rather limited in number. To tackle these problems, we propose a highly configurable mid-air device that supports an intuitive interaction with virtual environments. R³ (roll, rotate, rattle) offers good accuracy for 2D and 3D navigation, modeling and gameplay, but also tactile feedback through the presence of a trackball, all this in a user-oriented way. Additionally, the device can be easily switched back to being used as a regular mouse.
Keywords: human-computer interaction, input device, hardware, free-space interaction, degrees of freedom
Depth Perception Evaluation of 3d Virtual Prototypes Using Immersive Cave Systems BIBAKPDF 51-54
  Florin Garbacia; Andreea Beraru; Eugen Butila
In this paper an experimental study that aimed depth perception of virtual prototypes in an immersive environment compared with the depth perception of virtual prototypes using 2D LCD monitor is presented. The experiment carried out shows that perceived depth values estimated for virtual prototypes is significantly influenced by the stereoscopic visualization. Another interesting result of the study was that the estimated depth accuracy significantly increases with the depth size that has to be perceived. The results of conducted experimental study illustrate that the use of immersive stereoscopic visualization is useful during Computer Aided Design related activities.
Keywords: immersive 3D Systems, Virtual Reality, Virtual Prototyping, CAD
A Ball Tracking Technique for Augmented Reality Applications BIBAKPDF 55-58
  Dragos Catalin Barbu; Silvia-Ramona Bunea; Stefan Magureanu
This article presents a robust tracking technique based on colored balls and with a reduced need for computing resources. The technique is based on a random Hough transform algorithm which is optimized for use in real-time applications such as augmented reality systems. Requiring only a conventional color camera attached to a regular PC, this approach allows to determine the 3D position of balls based on interactive processing frameworks. The algorithm is fast enough to be easily combined with other real-time tracking engines. Unlike tracking techniques based on recognition of planar markers, this technique provides robustness to partial occlusion, which interact with real objects.
Keywords: segmentation, scene analysis, tracking, AR applications
Didactics in Assisted Instruction BIBAKPDF 59-64
  Gabriel Zamfir
Currently, cognitive development is based on diversifying activities which depend on use of personal computers. In terms of technology, the modern world is constantly developing, with its systems becoming more efficient, with which an individual or group of individuals endowed with a rich amount of knowledge systematically, offering increasingly diversified. From a social perspective, the difficulty lies precisely to teach the knowledge workers in order to understand and apply available technology. This paper analyzes and summarizes learning problems by reconsidering the relationship between theory and practice. A new paradigm is proposed, focused on didactics developed in an assisted instruction environment. By this approach, the teacher -- personal computer -- student triad reflected in education activities are highlighted, in human-computer interaction context.
Keywords: assisted instruction, assisted didactics design, computer literacy, cognitive infrastructure
Interactive Tools for Lessons Development in Collaborative Elearning Systems BIBAKPDF 65-70
  Mircea Marginean; Teodor Stefanut
Current direction in the development of eLearning systems is mainly oriented towards creating collaborative lessons using interactive tools. The teacher has the possibility to create the lesson using interactive tools while the students can use it in running mode in a collaborative way, very similar to a lesson organized in the classroom, where the teacher can interact with his students in real time. This paper presents different types of interactive tools, their development methodology and their integration into already existing eLearning systems. Have been studied, developed and integrated the following types of tools: text visualization, image visualization, video visualization. Each tool is composed of two modules: the edit module -- available to the teacher only, and the visualization module -- available to the teacher as well as to the students. One of the problems that have been discussed in this paper was the maximization of the space available to the visualization module and, at the same time, the minimization of the space available for the editing module. Another problem discussed here concerns the proposal of a base standard for the modular development of the tools, so this process to be kept independent against the eLearning platform where the tools will be eventually integrated.
Keywords: interactive tools, eLearning systems, collaborative systems, interactive lessons
Improving a Elearning System Using Specific Elements Of a Question-Answering System BIBAKPDF 71-74
  Adrian Iftene; Ancuta Rotaru
Today Web developers try to create customized Web pages that are specific for every user, based on characteristics such as their interests, social class they belong to them or the context in which they access the pages. Web application that we built it helps the two categories of users (students and teachers) to communicate more easily from a distance. One of the basic components of this system identifies similar questions posted by students on basis of the question type and answer type and based on common keywords. This component helps the student first, because it can quickly get an acceptable answer to his question, from a similar question that already exist in the system, with already responded from the teacher. Secondly it helps the teacher, because when a student no longer wishes to answer the question (being satisfied with the answer given), he can mark the question to not longer is forwarded to the teacher. In this way, the system automatically reduces the number of questions requiring a response from the teacher.
Keywords: eLearning system, Question Answering system
MDL -- Computer Assisted Lesson Development Module BIBAKPDF 75-80
  Daniel Safta; Dorian Gorgan
In this article we present a new approach to teaching computer science -- the evaluation and visual modeling of algorithms based on metaphorical forms -- applied within the core of a virtual education system, the development module for computer-based lessons (MDL). We reveal the structure and characteristics of the teaching process that we implemented in the proposed system, students and their roles, applied teaching methods, solutions for evaluation and a case study on a lesson model. We presented the state of the art in this domain highlighting the advantages of the described solution set, and also possible extensions.
Keywords: computer assisted instruction, visual modeling, teaching process, algorithmic thinking, programming language
Development of Multimedia Components for Educational Mobile Systems BIBAKPDF 81-84
  Adriana Elena Reveiu; Marian Dardala
This paper proposes a solution based on templates for generating multimedia components for distributed training systems, which can be used in applications that run on both PCs and mobile devices. The purpose of this solution is to provide access to training resources, usually available in classrooms through personal computers, in other locations, using mobile devices. To become useful tools in education, the technical solutions proposed aimed to use the potential of mobile devices and adapting educational content to the specific characteristics of mobile devices, communications networks, user preferences and user's knowledge.
Keywords: M-learning, mobile technologies, multimedia content adaptation, template-based multimedia tools
Improving the Relevance of Search Engine Results Using Semantic Information from Wikipedia BIBAKPDF 85-90
  Cristina Scheau; Traian Eugen Rebedea; Costin Chiru; Stefan Trausan-Matu
Depending on the user's intention, the queries processed by a search engine can be classified in transactional, informational and navigational. In order to meet the three types of searches, at this moment search engines basically use algorithmic analysis of the links between pages improved by a factor that depends on the number of occurrences of the keywords in the query and the order of these words on each web page returned as a result. For transactional and informational queries, the relevance of the results returned by the search engine may be improved by using semantic information about the query concepts when computing the order of the results presented to the user. Wikipedia is a huge thesaurus which has the advantage of already being multi-lingual and semi-structured, presenting a dense structure of internal links that can be used to extract various types of information. This paper proposes a method to extract semantic relations between concepts considered as the names of the articles from Wikipedia, and then use these relations to determine the rank of the results returned by a search engine for a given query.
Keywords: search engine, optimization, reordering, semantic relations, Wikipedia
Using Design Patterns to Redesign The Search Engine of an Academic Web Site BIBAKPDF 91-94
  Sabin-Corneliu Buraga; Ecaterina Valica
This paper presents the use of design patterns as a solution for redesigning the interaction between visitors and the search engine of an academic Web site -- in this case, the collaborative XWiki-based Web site of the Faculty of Computer Science, "A. I. Cuza" University of Iasi, Romania.
Keywords: web interaction, design patterns, search, Web design, prototyping
Evaluation and Automatic Summarization of Chat Conversations BIBAKPDF 95-100
  Mihai Dascalu; Stefan Trausan-Matu; Philippe Dessus
With the continuous evolution of collaborative environments, the need for automatic analysis and participant assessment in Instant Messenger discussions (chats) has become more and more important. Moreover, a key element in a grading and evaluation system for participants and utterances is summarization. In order to achieve the previous goals, a series of factors specific to natural language processing (including semantic analysis by means of Latent Semantic Analysis -- LSA) and data-mining were taken into consideration. In order to achieve a thorough and multi-perspective approach for assessing participants, the system includes facilities derived from Page's essay grading techniques, readability assessment and metrics specific to social networks analysis. A golden standard was used for assessing the relevance of the obtained results and for validation purposes of the proposed method.
Keywords: extractive chat summarization, participative assessment, collaborative environments, social networks, tagged LSA
Location-Based Services Personalization Using Genetic Algorithms and Intelligent Agents BIBAKPDF 101-104
  Liviu Adrian Cotfas; Andreea Diosteanu
This article analyzes possible solutions for improving Location-based Services (LBS) by using genetic algorithms and intelligent agents. The proposed solution enables identifying the points of interest based on the user profile and on the current context, and also generating routes in multi-modal and multi-operator public transport networks. The route generator process is based on a genetic algorithm that offers users the possibility to have a flexible restriction set for quantifying the importance degree of each associated optimization criterion. Therefore, we add an additional level of personalization over the exclusive use of fixed constraints set in the route identification process. The points of interest are represented by using intelligent agents and the communication between them is realized with the help of predefined ontologies.
Keywords: mobile user interface, Location-based Services, Intelligent Agents, Genetic Algorithms
Extracting Implicit Opinions of Economic Texts BIBAKPDF 105-108
  Claudiu Cristian Musat; Stefan Trausan-Matu
We propose a new approach to opinion mining that relies not on explicit occurrences of opinions in economic texts but on implicit ones extracted from the polarity of the discussed economic subtopic. We begin by dynamically generating a financial text corpus, following outgoing links from a set of financial web pages and then by checking whether economic topics are discussed. We separate economic from non economic texts by searching for key expressions from a database built beforehand. In the second phase we prove that the majority of economic texts that contain personal opinions can be retrieved based solely on the implicit opinions within. We rely on co-occurrences of economic indicators and future state modifiers to determine the polarity of each text. We also present an extraction method for the said key terms.
Keywords: economy, extracting opinions, financial economic indicators
Interactive Components in a Environment for Grid Applications Development BIBAKPDF 109-114
  Victor Bacu; Dorian Gorgan
The degree of usability of the Grid applications by specialists in other fields than computer science is low. This is due to the lack of interactive components integrated in the Grid platforms that allow a transparent access to Grid infrastructure. The majority of the Grid applications may only be used through command line scripts. An environment for Grid application development should provide interactive components for data management and workflows on Grid and interactive components for development and inclusion of operators. In this paper we present an architecture of such a development environment with emphasis on interaction techniques and interactive components.
Keywords: grid applications, development environments, interaction techniques
Task Modeling at Operational Level in the Context of Model-Based Design BIBAKPDF 115-118
  Costin Pribeanu
In the context of model-based design of user interfaces it is important to pay attention to the modelling of all relevant aspects as well as to the specification of relationships between models. The task model has a particular importance since it mediates the relationship between the domain model and the presentation model. The purpose of this paper is to approach task modeling at operational level from a broader perspective, defined by the activity theory and the reference model for multi-target user interfaces.
Keywords: task analysis, model-based design, basic tasks, operational task layer, activity theory, UsiXML
Using Software for Decoding and Analysis of Physiological Reactivity in Human Higher Cognitive Processes BIBAKPDF 119-122
  Mihai Anitei; Mihaela Chraif; Andrei Neacsu; Claudiu Papasteri; Mihai Ciolacu
The scientific data obtained by the polygraph technique concerning the human psychophysiological reactivity has been disputed by a part of the scientific community, who invoke the lack of consistent theories which would sustain the existence of clear, causal links between the cognitive processes involved in simulation and the measured physiological peripheral parameters (respiratory parameters, cardiovascular parameters, galvanic skin response). In this context, neurosciences are all the more looked upon to explain the approach of the cognitive level of simulated behavior, in the attempt to understand the neurophysiological basis of the underlying mental processes. This article emphasises the utility of the LX 4000- version 9.9.5. used by the Lafayette model 4000 polygraph in detecting and analising the human psychophysiological reactivity to different stimuli and during superior cognitive processes. The conclusions of this article demonstrate that the operationalization of these technologies must be synchronized with the fundamental research which targets the elaboration of solid scientific theories concerning simulated behavior.
Keywords: electrodermal response, Calipers section, psychophysiological reactivity
Designing and Developing an Interactive System for the Management of the Organizations Involved in the Transport Research Activities BIBAKPDF 123-126
  Ionut Petre; Dragos Marian Smada
The purpose of this paper is to present the Web interface that provides the access to the information from the database built within the TransNew European project. This project aims to develop and exploit an international database, containing data about organizations that activate in the Transport Research domain. TransNew is focused on assessing, analyzing and defining research strategies for the Transport area in the New Member States and Associated States. The interface provides to the final user a fast access to data about research organizations, transport research projects, evaluations of the national transport policies or information about the researchers involved in these projects. The administration mode of the interface provides the organizations the possibility to easily insert, manage and update the data about their activities and results.
Keywords: web interface, database, transport research
New Technologies and Children's Cognitive Development: Some Guidelines and Recommendations for Design BIBAKPDF 127-130
  Ana-Maria Marhan
Most HCI principles and design recommendations have been tested and refined in the process of developing computer interfaces for the adult user. During the last few years, a growing demand for new sets of recommendations has occurred. This paper discusses an example of guidelines to be specifically used in the process of design and evaluation of computer interfaces for very young users, especially children entering formal education system (5 to 8 years old).
Keywords: cognitive development, learning, operational stage, design recommendations
Medical Assistance Through the Internet for Persons with Mobility Impairments and for Persons Residing in Rural and Medically Under-Served Areas BIBAKPDF 131-134
  Adriana Alexandru; Cristina Simona Alecu
This paper presents an IT system (MeDist), which offers an operative and user-friendly patient-medical system interface. The system will be a useful instrument for healthcare services for persons in rural areas and for persons located in remote or isolated places and also for those un-transportable, with special needs. In order to assist them, at the design of the system we have taking into account of the WCAG (Web Content Accessibility Guidelines) recommendations within the initiative in developing accessible websites (Web Accessibility Initiative -- WAI) of the World Wide Web Consortium. The MeDist system offers: teleconsultation (remote medical assistance), monitoring of chronic patients in need of locally unavailable specialists, orientation of the patient towards the best place of treatment, medical care and recovery, and facilities for making patient appointments.
Keywords: telemedicine, medical assistance, accessibility