Romanian Journal of Human - Computer Interaction Vol. 5 (2012) Special issue: Human Computer Interaction 2012 Proceedings of the National Conference on Human-Computer Interaction Bucharest, 6-7 September 2012 ISSN 1843-4460
	Contents Interactions in Smart Environments and the Importance of Modelling Peter Forbrig   1-12 A Formative Measurement Model For The Motivational Value Of An AR-Based Educational Application Costin Pribeanu   13-18 The Evaluation Of Two Augmented Reality Applications For School Environment – Focus Group With Teachers Dragoş Daniel Iordache, Ioan Neacşu   19-25 Prototypes Of  Human-Machine Interactions And Types Of Educational Applications Specific To Mobile Augmented Reality Livia Ştefan   26-30 2D Graphical Interaction In Elearning Andreea Chiscari, Dorian Gorgan   31-36 Experimentation Of An Acceptance Model Of E-Learning Systems Alexandru Balog   37-40 Controlling The Applications Running On A Windows System By Means Of Android Devices Cristina Şerban, Irina Grosu, Alexandra Siriţeanu, Alexandru Averescu, Adrian Iftene   41-44 Optimizing Educational Platforms Interfaces Constantin-Gelu Apostol, Alina-Mihaela Ion, Dragoş Vespan   45-48 The Development Of Educational Content Based On Web Services Arnold-Mihai Waldraf, Dorian Gorgan   49-54 Network Based Analysis Of Intertextual Relations Ioan Cristian Ghiban, Ştefan Trauşan-Matu   55-64 Text-to-Speech Synthesys for Romanian Language Teodor Paul Alin Becan, Dorian Gorgan   65-70 Automatic Analysis Of Self-Explanations Bogdan Oprescu, Mihai Dascălu, Ştefan Trăuşan-Matu, Traian Rebedea, Philippe Dessus, Maryse Bianco   71-76 Web 2.0 Recruiting Vlad Posea   77-80 Specific Usability Problems With Municipal Websites: A Case Study With Five District Halls Costin Pribeanu, Maria Gheorghe-Moisii, Dragoş Daniel Iordache   81-84 Testing A Component For Learning Mathematics  With Users Ion Smeureanu, Narcisa Isăilă   85-88 Accessability Analysis of Interactive Systems Using MOM Tool Paul Fogarassy-Neszly   89-92 Personas Method in the Context of Semantic Web Ştefan Negru, Sabin Buraga   93-96 Team Formation using Psychological Profiles Corina Ciubuc, Mihai Dascălu, Ştefan Trăuşan-Matu, Traian Rebedea   97-102 Mood and Sentiment Assessment Using Latent Semantic Analysis Diana Lupan, Mihai Dascălu, Ştefan Trăuşan-Matu, Traian Rebedea, Philippe Dessus, Maryse Bianco   103-108 Evolutionary Social Network Analysis of Web-based Educational Environments Andrew Laghos   109-112 An Analysis Of The Quality And Accessibility Of Suicide Information Available To The Romanian-Speaking User Ana Maria Marhan   113-116 Interactive Video Interface For Embedded Systems Dan Rotar, Dragoş Andrioaia   117-120 Face Recognition based Authentication on Mobile Julia Kovacs, Dorian Gorgan   121-124 Labview Interfaces Used To Generate The Waveforms And Data Files Specific Of Electrical Switching Devices Tests Marinel Popescu, Constantin Iancu   125-128 Description of Satellite Images Processing in Greenland Application Dănuţ Mihon, Vlad Colceriu, Angela Minculescu, Victor Bâcu, Dorian Gorgan   129-134   Abstracts Interactions in Smart Environments and the Importance of Modelling Peter Forbrig Department of Computer Science Albert-Einstein-Str. 21, D-18051 University of Rostock, Rostock, Germany peter.forbrig@uni-rostock.de Abstract. 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. View full article   A Formative Measurement Model For The Motivational Value Of An AR-Based Educational Application Costin Pribeanu Institutul Naţional de Cercetare-Dezvoltare în Informatică, ICI Bucureşti Bd. Mareşal Averescu nr.8-10, Bucureşti pribeanu@ici.ro Abstract. 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. View full article   The Evaluation Of Two Augmented Reality Applications For School Environment – Focus Group With Teachers Dragos Daniel Iordache1, Ioan Neacşu2 1Institutul Naţional de Cercetare-Dezvoltare în Informatică, ICI Bucureşti Bd. Mareşal Averescu nr.8-10, Bucureşti iordache@ici.ro 2Universitatea din Bucuresti Bd. Mihail Kogalniceanu, nr. 36-46 neacsuioan2008@yahoo.com Abstract. 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. View full article   Prototypes Of  Human-Machine Interactions And Types Of Educational Applications Specific To Mobile Augmented Reality Livia Ştefan Universitatea Politehnică Bucureşti Splaiul Independenţei nr. 313, sector 6, Bucureşti livia.stefan@itc.ro Abstract. 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 rythm 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 paradigme 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. View full article   2D Graphical Interaction In Elearning Andreea Chişcari, Dorian Gorgan Universitatea Tehnică din Cluj-Napoca Str. Memorandumului 28, Cluj-Napoca andreeachiscari@gmail.com, dorian.gorgan@cs.utcluj.ro Abstract. 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. View full article   Experimentation Of An Acceptance Model Of E-Learning Systems Alexandru Balog Institutul Naţional de Cercetare-Dezvoltare în Informatică – ICI Bucureşti Bd. Mareşal Averescu nr.8-10, Bucureşti alexb@ici.ro Abstract. 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”. View full article   Controlling The Applications Running On A Windows System By Means Of Android Devices Cristina Şerban, Irina Grosu, Alexandra Siriţeanu, Alexandru Averescu, Adrian Iftene Universitatea “Alexandru Ioan Cuza” din Iaşi, Facultatea de Informatică {cristina.serban, irina.grosu, alexandra.siriteanu, alexandru.averescu, adiftene}@info.uaic.ro Abstract. 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. View full article   Optimizing Educational Platforms Interfaces Constantin-Gelu Apostol, Alina-Mihaela Ion, Dragoş Vespan Academia de Studii Economice Piaţa Romană 6, Bucureşti {constantin.apostol, alina.ion, dragos.vespan}@ie.ase.ro Abstract. 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. View full article   The Development Of Educational Content Based On Web Services Arnold-Mihai Waldraf, Dorian Gorgan Universitatea Tehnică din Cluj-Napoca Str. Memorandumului, 28, Cluj-Napoca waldrafarnold@yahoo.com, dorian.gorgan@cs.utcluj.ro Abstract. 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. View full article   Network Based Analysis Of Intertextual Relations Ioan Cristian Ghiban1, Ştefan Trăuşan-Matu1,2 1Universitatea “Politehnica” Bucureşti 313 Splaiul Independenţei, Bucureşti, ioan.ghiban@cs.pub.ro, stefan.trausan@cs.pub.ro 2Institutul de Cercetări în Inteligenţă artificială Calea 13 Septembrie nr. 13, Bucureşti Abstract. 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. View full article   Text-to-Speech Synthesys for Romanian Language Teodor Paul Alin Becan, Dorian Gorgan Universitatea Tehnică Cluj-Napoca Str. Memorandumului nr. 28, Cluj-Napoca Becan.Paul@it-dynamics.ro, dorian.gorgan@cs.utcluj.ro Abstract. 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. View full article   Automatic Analysis Of Self-Explanations Bogdan Oprescu1, Mihai Dascălu1, Ştefan Trăuşan-Matu1, Traian Rebedea1, Philippe Dessus2, Maryse Bianco2 1Universitatea Politehnica din Bucureşti 313 Splaiul Independenţei, Bucuresti bogdan.oprescu@cti.pub.ro, {mihai.dascalu, stefan.trausan, traian.rebedea}@cs.pub.ro 2Université Pierre-Mendès France Grenoble CEDEX 9, Franţa {philippe.dessus, maryse.bianco}@upmf-grenoble.fr Abstract. 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. View full article   Web 2.0 Recruiting Vlad Posea Universitatea Politehnica Bucuresti Splaiul Independenţei 313, sector 6 vlad.posea@cs.pub.ro Abstract. 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. View full article   Specific Usability Problems With Municipal Websites: A Case Study With Five District Halls Costin Pribeanu, Maria Gheorghe-Moisii, Dragoş Daniel Iordache Institutul Naţional de Cercetare-Dezvoltare în Informatică – ICI Bucureşti Bd. Mareşal Averescu nr.8-10, Bucureşti {pribeanu, maria, iordache}@ici.ro Abstract. 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. View full article   Testing A Component For Learning Mathematics  With Users Ion Smeureanu1, Narcisa Isăilă2 1Academia de Studii Economice Calea Dorobanţilor, nr. 15-17, Bucureşti smeurean@ase.ro 2Universitatea Creştină “Dimitrie Cantemir” Splaiul Unirii nr.176, Bucureşti, România isaila_narcisa@yahoo.com Abstract. 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. View full article   Accessability Analysis  of Interactive Systems Using MOM Tool Paul Fogarassy-Neszly BAUM Engineering Str. Traian Moşoiu nr.8, Arad pf@baum.ro Abstract. 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. View full article   Personas Method in the Context of Semantic Web Ştefan Negru, Sabin Buraga Facultatea de Informatică, Universitatea „Alexandru Ioan Cuza” General Berthelot, 16, Iaşi {stefan.negru, busaco}@infoiasi.ro Abstract. 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). View full article   Team Formation using Psychological Profiles Corina Ciubuc, Mihai Dascălu, Ştefan Trăuşan-Matu, Traian Rebedea Universitatea Politehnică Bucureşti Str. Splaiul Independenţei nr. 313, Bucureşti corina.ciubuc@cti.pub.ro, {mihai.dascalu, stefan.trausan, traian.rebedea}@cs.pub.ro Abstract. 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. View full article   Mood and Sentiment Assessment Using Latent Semantic Analysis Diana Lupan1, Mihai Dascălu1, Ştefan Trăuşan-Matu1, Traian Rebedea1, Philippe Dessus2, Maryse Bianco2 1Universitatea Politehnica din Bucureşti 313 Splaiul Independenţei, Bucuresti diana.lupan@cti.pub.ro, {mihai.dascalu, stefan.trausan, traian.rebedea}@cs.pub.ro 2Université Pierre-Mendès France Grenoble CEDEX 9, Franţa {philippe.dessus, maryse.bianco}@upmf-grenoble.fr Abstract. 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 tehniques) with the influences of user’s current emotional state evaluated through his/her feedback. View full article   Evolutionary Social Network Analysis of Web-based Educational Environments Andrew Laghos Cyprus University of Technology 30 Arch. Kyprianos Str. Limassol, Cyprus andrew.laghos@cut.ac.cy Abstract. 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. View full article   An Analysis Of The Quality And Accessibility Of Suicide Information Available To The Romanian-Speaking User Ana Maria Marhan Institutul de Filosofie şi Psihologie “Constantin Rădulescu-Motru” al Academiei Române Casa Academiei, Calea 13 Septembrie nr. 13, Bucureşti anamaria.marhan@ipsihologie.ro Abstract. 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. View full article   Interactive Video Interface For Embedded Systems Dan Rotar, Dragoş Andrioaia  Universitatea “Vasile Alecsandri” din Bacău Calea Mărăşeşti, nr 157, Bacău {drotar, dragos.andrioaia}@ub.ro Abstract. 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. View full article   Face Recognition based Authentication on Mobile Julia Kovacs, Dorian Gorgan Universitatea Tehnică Cluj Napoca Str. Memorandumului nr. 28 kovacs_julia@student.utcluj.ro, dorian.gorgan@cs.utcluj.ro Abstract. 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. View full article   Labview Interfaces Used To Generate The Waveforms And Data Files Specific Of Electrical Switching Devices Tests Marinel Popescu, Constantin Iancu Institutul Naţional de Cercetare-Dezvoltare şi Incercări pentru Electrotehnică, ICMET Bd. Decebal, 118A, Craiova marinel_popescu@yahoo.com, lmp@icmet.ro Abstract. 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. View full article   Description of Satellite Images Processing in Greenland Application Dănuţ Mihon, Vlad Colceriu, Angela Minculescu, Victor Bâcu, Dorian Gorgan Universitatea Tehnică din Cluj-Napoca Str. Memorandumului, 28, Cluj-Napoca {vasile.mihon, vlad.colceriu}@cs.utcluj.ro, angela.minculescu@gmail.com, {victor.bacu, dorian.gorgan}@cs.utcluj.ro Abstract. Abstract. 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. View full article