Romanian Journal of
Human - Computer InteractionVol.6, No.1, 2013
ISSN 1843-4460
Contents
Satellite images visualization techniques based on geospatial services.
Vasile Dănuţ Mihon, Vlad Colceriu, Victor Bâcu, Dorian Gorgan
1 - 22 The coupling of active components for innovative learning environments.
Ion Smeureanu, Narcisa Isăilă
23 - 34 3DUPB - The Mixed Reality Campus: A glimpse at how mixed reality systems can shape the future.
Alin Moldoveanu, Anca Morar, Victor Asavei
35 - 56 A Polyphonic Model for Creativity in Small Virtual Collaborative Groups.
Ştefan Trăuşan-Matu
57 - 78 Software solution for proximities representation in GIS using adjacency matrix.
Marian Dârdală, Titus Felix Furtună, Adriana Reveiu
79 - 96 Multimedia Content Consumption in the Context of Digital TV
Emil Stănescu
97 - 109
Abstracts
Satellite images visualization techniques based on geospatial services
Vasile Dănuţ Mihon, Vlad Colceriu, Victor Bâcu, Dorian Gorgan
Universitatea Tehnică din Cluj-Napoca
Str. Memorandumului, Nr. 28, 400114, Cluj-Napoca
E-mail: {vasile.mihon, vlad.colceriu, victor.bacu, dorian.gorgan}@cs.utcluj.ro
Abstract. The analysis of large volumes of data, the extraction of relevant information, and the interactive exposure and visualization of the results represent the basic processes in modeling the natural phenomena, based on satellite image processing. Due to the large dimension and their high frequency of acquisition, the satellite images are stored within specialized data repositories and accessed by means of standards. The paper presents the experiments through the GreenLand platform to achieve high usability user interaction techniques for accessing, searching, extracting, and visualizing the satellite images. The implemented solutions use the geospatial services provided by the OGC standard. The benefits resulted by integrating this standard with the GreenLand platform and the services given by the Grid infrastructure represent another main subject of this paper.
Keywords: OGC standards, interaction techniques, dynamic visualization, satellite images, geospatial services.
Cite this paper as:
Mihon, V.D., Colceriu, V., Bâcu, V., Gorgan, D. Satellite images visualization techniques based on geospatial services. Revista Romana de Interactiune Om-Calculator 6(1), 1-22, 2013.
The coupling of active components for innovative learning environments
Ion Smeureanu1, Narcisa Isăilă2
1Academia de Studii Economice Bucureşti
Piaţa Romană , Nr. 6, Bucureşti
E-mail: smeurean@ase.ro
2Universitatea Creştină „Dimitrie Cantemir” Bucureşti
Splaiul Unirii, Nr. 176, Bucureşti
E-mail: isaila_narcisa@yahoo.comAbstract. The innovative learning environments are a preoccupation for both educators and developers, this concern being encouraged by information technologies which are in a continuous development. On the other hand, European legislation encourages the creation of learning environments based on the innovative teaching methods, taking into account the principle of "lifelong learning". Closely related to the purpose of education, in terms of informatics, it is desirable that by coupling the learning components at lesson level to be diminished the effort to integrate educational resources into an innovative environment, highly personalized and adapted to the learning needs of students. The paper aims to investigate the extent to which the components technology allows to achieve this, taking into account the benefits for students and teachers, through releasing the capacities of creativity and innovativity.
Keywords: complex learning components, component coupling, „point & shoot”, „drag & drop”, mathematics, innovation innovation.
Cite this paper as:
Smeureanu, I., Isăilă, N. The coupling of active components for innovative learning environments. Revista Romana de Interactiune Om-Calculator 6(1), 23-34, 2013.
3DUPB - The Mixed Reality Campus: A glimpse at how mixed reality systems can shape the future
Alin Moldoveanu, Anca Morar, Victor Asavei
Universitatea POLITEHNICA din Bucureşti – UPB
Splaiul Independentei nr. 313, sector 6, Bucureşti, 060042
E-mail: {alin.moldoveanu, anca.morar, victor.asavei}@cs.pub.ro
Abstract. Mixing concepts and techniques coming from 3D MMO games, virtual reality, mixed reality and ubiquitous computing, the 3DUPB project challenges the traditional ways of our daily activities and interaction. În a few words, as a computer system, it can be described as "3D MMO Virtual and Real-Time Replica of the POLITEHNICA University of Bucharest campus". However, tightly integrated with the educaţional, social and organizaţional life of the university, 3DUPB will be more than just a computer system and will open new possibilities for human activity and interaction, a glimpse at how mixed reality systems can shape the future. This paper describes the main reasons while 3D UPB was started, its up to date concept, relation with other systems, the basic software architecture, the main technical issues and solutions, as well as the perspectives.
Keywords: MMO, mixt reality, virtual educaţional environments, virtual social environment.
Cite this paper as:
Moldoveanu, A., Morar, A., Asavei, V. 3DUPB - The Mixed Reality Campus: A glimpse at how mixed reality systems can shape the future. Revista Romana de Interactiune Om-Calculator 6(1), 35-56, 2013.
A Polyphonic Model for Creativity in Small Virtual Collaborative Groups
Ştefan Trăuşan-Matu1,2
1Universitatea Politehnica din Bucureşti
2Institutul de Cercetări în Inteligenţa Artificială
Splaiul Independenţei nr. 313, sector 6, 060042, Bucureşti,
E-mail: stefan.trausan@cs.pub.ro
Calea 13 septembrie nr. 13, BucureştiAbstract. Polyphonic music and counterpoint are a model for creativity because they appeared naturally in musical composition processes for developing a theme in the context of a community of voices and they were validated by listeners. The paper studies how polyphony, counterpoint, ventriloquism may be a model of creativity and, particularily, of knowledge building in virtual collaborative systems on the web. As I mentioned in previous papers, colaborative interfacing tools may stimulate inter-animation, with beneficial effects on creativity fostering. Repetitions and echoes of words make them get a special importance, sometimes becoming artefacts. The paper presents several examples that evidentiate the polyphonic concepts in chat conversations in which appear micro-creativity processes.
Keywords: creativity, polyphony, dialogism, brainstorming, sinectics, ventriloquism.
Cite this paper as:
Trăuşan-Matu, S. A Polyphonic Model for Creativity in Small Virtual Collaborative Groups. Revista Romana de Interactiune Om-Calculator 6(1), 57-78, 2013.
Software solution for proximities representation in GIS using adjacency matrix
Marian Dârdală, Titus Felix Furtună, Adriana Reveiu
The Bucharest University of Economic Studies
6, Romană Square, 010374, Bucharest
E-mail: dardala@ase.ro, titus@ase.ro , reveiua@ase.roAbstract: This paper presents how to design and implement a software module to achieve an alternative description of a map thematic compositions and applications of this representation. It starts from a layer containing spatial data of polygon type that can be described through adjacency matrix that holds neighborhood information for each of the existing vectors in the spatial feature. There are also presented applications of this representation: coloring maps with a minimum number of colors and the Moran index of spatial correlation calculation. The maps coloring is done thus for any two neighboring polygons they do not have the same color. The Moran spatial correlation coefficient is the standard used to determine the degree of dependence between the values of a variable in neighboring locations. It is used to identify a pattern in the spatial distribution of the valuesof an economic variables and the existence of common factors that influences the obtaining of these values.
Keywords: adjacency matrix, GIS, Backtracking, Greedy, symbology, Moran index of spatial correlation.
Cite this paper as:
Dârdală, M., Furtună, T.F., Reveiu, A. Software solution for proximities representation in GIS using adjacency matrix. Revista Romana de Interactiune Om-Calculator 6(1), 79-96, 2013.
Multimedia Content Consumption in the Context of Digital TV
Emil Stănescu
National Institute for Research & Development in Informatics– ICI Bucureşti
Bd. Mareşal Averescu, Nr. 8-10, 011455, BucureştiAbstract: In this period ends switchover from analogue to digital TV. At the same time is accelerating the pace of diversifying multimedia resources, facilities offered by the receiving devices and communication technologies transmitting multimedia content. In this context, the factors that influence consumer satisfaction with multimedia content transmitted through digital TV services and, possibly, through the Internet, is an important indicator for the user loyalty to a service provider. In the article we make an analysis of the link between three important concepts in the provision of digital multimedia: QoS, QoE and customer satisfaction. Digital television brings picture quality elements that positively influences QoE. But, if TV service provider not effectively controls the encoding parameters of the video stream and does not allocate sufficient transmission bandwidth, it can lead to degradation of received images, leading to lower QoE and lower loyalty for TV service provider. Another factor influencing QoE is interactivity, and, in this paper, we present a method of selecting important events in the video stream so that they can subsequently be requested on demand by subscribers.
Keywords: digital TV services, multimedia content, quality of services.
Cite this paper as:
Stănescu E. Multimedia Content Consumption in the Context of Digital TV. Revista Romana de Interactiune Om-Calculator 6(1), 97-109, 2013.