Papers by José Palazzo Moreira de Oliveira
Proceedings of the First International Conference on Computer Supported Education, 2009
In cooperative editing environments (e.g. Wikis), users can create and edit documents in a freely... more In cooperative editing environments (e.g. Wikis), users can create and edit documents in a freely and cooperatively manner. However, sometimes it is interesting to identify if the contributions made by one user are really reliable, since users don't trust each other in an explicit way. This point is a central discussion about the open publishing truthfulness. While it is difficult to automatically identify the relevance of each user contribution, it is more plausible to evaluate their reputation as perceived by the community. In this paper we describe a model to evaluate the user's reputations in a Wiki community and the prototype developed for its evaluation. The basic assumption is that we are dealing with a homogeneous cooperative group on a limited knowledge context. This environment exists, for instance, in a cooperative group trying to consolidate organizational implicit knowledge into documents as a class-based report generation. This kind of environment is very useful to stimulate collaborative learning.
Proceedings 33rd International Conference on Technology of Object-Oriented Languages and Systems TOOLS 33, 2000
This paper presents an object oriented framework for task scheduling. This framework can be used ... more This paper presents an object oriented framework for task scheduling. This framework can be used in domains such as Process-centred Software Engineering Environments, Workflow Management Systems or Project Management Systems. The framework was conceived based on both current methods for the development of frameworks and an existing architectural pattern for process managers. A prototype of the framework was developed using the Java Language. The lessons learnt show the experience of extracting a framework from well-known applications that can be reused in practical domains. Thus, this work contributes not only in the production of a framework but also giving insights in the application of novel techniques to the development of frameworks.
Text Mining and its Applications to Intelligence, CRM and Knowledge Management, 2005
TV channel provider: mining the user feedback. LK Wives, S Loh, JL Duizith, JP Moreira De Oliveir... more TV channel provider: mining the user feedback. LK Wives, S Loh, JL Duizith, JP Moreira De Oliveira Text Mining and its Applications to Intelligence, CRM and Knowledge Management. Billerica, MA: WIT Press, 2005. 265, 2005. Text mining has many applications in numerous fields. In this section we describe one of these applications, related to Competitive Intelligence, Strategic Applications and CRM. The mining was performed on a real data set collected by a Brazilian pay TV channel provider 32 Information Storage, Retrieval, and Analysis(CI).
2010 10th IEEE International Conference on Advanced Learning Technologies, 2010
... Ana Marilza Pernas1,2, José Palazzo M.de Oliveira1 1Instituto de Informática Universidade Fed... more ... Ana Marilza Pernas1,2, José Palazzo M.de Oliveira1 1Instituto de Informática Universidade Federal do Rio Grande do Sul Porto Alegre, Brasil {ana.pernas, palazzo}@inf.ufrgs.br 2Universidade Federal de Pelotas, Brasil Amel Bouzeghoub3 3Computer Science Department ...
Proceedings of the International Conference on Web Intelligence, Mining and Semantics, 2011
Some of the metrics more commonly used for Social Networks Analysis (SNA) do not consider the wei... more Some of the metrics more commonly used for Social Networks Analysis (SNA) do not consider the weights of relationships between the actors of the analyzed Social Network, if it exists. These weights aim to measure the importance of the relational ties between actors and also are important to be considered in a SNA. This paper purposes the Gini Coefficient to
Conceptual Modeling — ER 2000, 2000
AHF Laender, SW Liddle, VC Storey (Eds.): ER2000 Conference, LNCS 1920, pp. 295-308, 2000. © Spri... more AHF Laender, SW Liddle, VC Storey (Eds.): ER2000 Conference, LNCS 1920, pp. 295-308, 2000. © Springer-Verlag Berlin Heidelberg 2000 ... A Conceptual Modeling Framework for Multi-agent Information Systems1 ... Ricardo M. Bastos 1 and José Palazzo M. de Oliveira 2
This paper motivates the blend of social computing with service-oriented computing, giving "birth... more This paper motivates the blend of social computing with service-oriented computing, giving "birth" to social Web services. On the one hand, social computing builds user applications upon the principles of collective action and content sharing. On the other hand, serviceoriented computing builds enterprise applications upon the principles of service offer and demand and loose coupling. Thanks to this blend social Web services can operate taking into account with whom they worked in the past and with whom they would like to work in the future. To engineer social Web services, this paper presents a four-step method that addresses several questions related to the engineering exercise. These questions are what relationships exist between Web services, what social networks correspond to these relationships, how to build social networks of Web services, and what social behaviors can Web services exhibit. Experiences dealing with implementing social Web services are, also, reported in the paper.
Lecture Notes in Computer Science, 2007
This paper presents a context-aware text summarizer based on ontologies intended to be used for a... more This paper presents a context-aware text summarizer based on ontologies intended to be used for adapting information to mobile devices. The system generates summaries from texts according to the profile of the user and the context where he/she is at the moment. Context is determined by spatial and temporal localization. Ontologies are used to allow identifying which parts of the texts are related to the user's profile and to the context. Ontologies are structured as hierarchies of concepts and concepts are represented by keywords with a weight associated.
2011 30th International Conference of the Chilean Computer Science Society, 2011
Abstractadaptive systems need to be aware about the user context and the occurrence of specific ... more Abstractadaptive systems need to be aware about the user context and the occurrence of specific events to properly react to them. In particular, web-based educational systems have to be improved in order to consider the learner in his/her current situation. Thus, the main ...
Techniques and Applications
This chapter introduces a technique to cluster textual documents using concepts. Document cluster... more This chapter introduces a technique to cluster textual documents using concepts. Document clustering is a technique capable of organizing large amounts of documents in clusters of related information, which helps the localization of relevant information. Traditional document clustering techniques use words to represent the contents of the documents and the use of words may cause semantic mistakes. Concepts, instead, represent real world events and objects, and people employ them to express ideas, thoughts, opinions and intentions. Thus, concepts are more appropriate to represent the contents of a document and its use helps the comprehension of large document collections, since it is possible to summarize each cluster and rapidly identify its contents (i.e. concepts). To perform this task, the chapter presents a methodology to cluster documents using concepts and presents some practical experiments in a case study to demonstrate that the proposed approach achieves better results than...
2008 Eighth IEEE International Conference on Advanced Learning Technologies, 2008
Mobile technology provides many benefits to education. In this paper we describe the architecture... more Mobile technology provides many benefits to education. In this paper we describe the architecture of a system that allows people to search and retrieve information about its location and activities in a Campus, knowing about the resources available on its surroundings, including buildings, classes, events and people.
Physica A: Statistical Mechanics and its Applications, 2012
Many discussions have enlarged the literature in Bibliometrics since the Hirsh proposal, the so c... more Many discussions have enlarged the literature in Bibliometrics since the Hirsh proposal, the so called h-index. Ranking papers according to their citations, this index quantifies a researcher only by its greatest possible number of papers that are cited at least h times. A closed formula for h-index distribution that can be applied for distinct databases is not yet known. In fact, to obtain such distribution, the knowledge of citation distribution of the authors and its specificities are required. Instead of dealing with researchers randomly chosen, here we address different groups based on distinct databases. The first group is composed by physicists and biologists, with data extracted from Institute of Scientific Information (ISI). The second group composed by computer scientists, which data were extracted from Google-Scholar system. In this paper, we obtain a general formula for the h-index probability density function (pdf) for groups of authors by using generalized exponentials in the context of escort probability. Our analysis includes the use of several statistical methods to estimate the necessary parameters. Also an exhaustive comparison among the possible candidate distributions are used to describe the way the citations are distributed among authors. The h-index pdf should be used to classify groups of researchers from a quantitative point of view, which is meaningfully interesting to eliminate obscure qualitative methods.
IEEE Internet Computing, 2011
Service engineers often struggle to locate the relevant Web services needed to satisfy users' req... more Service engineers often struggle to locate the relevant Web services needed to satisfy users' requests. The authors describe how service engineers can capitalize on Web services' interactions-namely, collaboration, substitution, and competition-to build social networks for service discovery. Through these networks, Web services identify those peers with which they'd like to work, those that can replace them in case of failure, and those that compete against them for selection. Building a Web service's social network requires six steps, which the article describes.
The usage data mining allows information generation for interface adaptive processes. This paper ... more The usage data mining allows information generation for interface adaptive processes. This paper describes a work in the area of user behavior identification, with usage mining. The experiment related is conducted on an client-server system. With this approach is it possible to ...
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Papers by José Palazzo Moreira de Oliveira