Qualidade do serviço de informação digital :um estudo exploratório em web sites de Programas de Pós-Graduação

This dissertation of Mestrado investigated the performance and quality of web sites. The target of the research is the proposal of an integrated model of evaluation of services of digital information in web educational sites. The universe of the research was constituted by eighteen Brazilian Universities that offer after-graduation courses, in the levels of mestrado and doutorado in the area of Engineering of Production. The adopted methodology was a descriptive and exploratory research, using the technique of systematic comment and focus group, for the collection of the data, using itself changeable independent dependents and, through the application of two instruments of research. The analysis protocol was the instrument adopted for evaluation and attainment of qualitative results. E the analysis grating was applied for evaluation and attainment of the quantitative results. The qualitative results had identified to the lack of standardization of web sites, under the attributes of content, hierarchy of information, design of the colors and letters. It of accessibility for carriers of auditory and visual special necessities was observed inexistence, as well as the lack of convergence of medias and assistivas technologies. The language of the sites also was evaluated and all present Portuguese only language. The general result demonstrated in grafico and tables with classification of the Universities, predominating the Good note As for the quantitative results, analysis method ed was estatistico, in order to get the descriptive and inferencial result between the dependent and independent variaveis. How much a category of analysis of the services of the evaluated sites, was found it props up and the index generality weighed. These results had served of base for ranking of existence or inexistence the Universities, how much of the information of services in its web sites. In analysis inferencial the result of the test of correlation or association of the independent variaveis (level, concept of the CAPES and period of existence of the program) with the caracteristicas, called was gotten categories of services. For this analysis the estatisticos methods had been used: coefficient of Spearman and the Test of Fisher. But the category you discipline of the Program of Mestrado presented significance with variavel independent and concept of the CAPES. Main conclusion of this study it was ausencia of satandardization o how much to the subjective aspects, design, hierarchy of information navigability and content precision and the accessibility inexistence and convergence. How much to the quantitative aspects, the information services offered by web sites of the evaluated Universities, still they do not present a satisfactory and including quality. Absence of strategies, adoption of tools web, techniques of institucional marketing and services that become them more interactive, navigable is perceived and with aggregate value

Uma modelagem de indicadores de desempenho para instituições de ensino superior no Brasil na abordagem do balanced scorecard: um estudo com instituições privadas

This Master of Science Thesis deals with a BSC modeling for higher education institution focusing on private institution in the Brazilian context. It‟s accomplished a literature review in order to understand the BSC and its application to for profit and non for profit organizations and as a main result it is proposed a BSC conceptual model with a new perspective (Government) and a change in the hierarchy of the main BSC perspective equaling financial to customer/society. Taking the national higher education assessment system of Education Ministry indicators a model is deployed and the relations between the indicators are measured with the Pearson correlation coefficient. As a result a model emerges with sound relations of indicators but a improvement in the financial indicators is needed

H-N2N : uma arquitetura hierárquica escalável para ambientes de realidade mista de grande porte

In this work, we propose a solution to solve the scalability problem found in collaborative, virtual and mixed reality environments of large scale, that use the hierarchical client-server model. Basically, we use a hierarchy of servers. When the capacity of a server is reached, a new server is created as a sun of the first one, and the system load is distributed between them (father and sun). We propose efficient tools and techniques for solving problems inherent to client-server model, as the definition of clusters of users, distribution and redistribution of users through the servers, and some mixing and filtering operations, that are necessary to reduce flow between servers. The new model was tested, in simulation, emulation and in interactive applications that were implemented. The results of these experimentations show enhancements in the traditional, previous models indicating the usability of the proposed in problems of all-to-all communications. This is the case of interactive games and other applications devoted to Internet (including multi-user environments) and interactive applications of the Brazilian Digital Television System, to be developed by the research group. Keywords: large scale virtual environments, interactive digital tv, distributed

Aplicação de técnicas de aprendizado de máquina no reconhecimento de classes estruturais de proteínas

Nowadays, classifying proteins in structural classes, which concerns the inference of patterns in their 3D conformation, is one of the most important open problems in Molecular Biology. The main reason for this is that the function of a protein is intrinsically related to its spatial conformation. However, such conformations are very difficult to be obtained experimentally in laboratory. Thus, this problem has drawn the attention of many researchers in Bioinformatics. Considering the great difference between the number of protein sequences already known and the number of three-dimensional structures determined experimentally, the demand of automated techniques for structural classification of proteins is very high. In this context, computational tools, especially Machine Learning (ML) techniques, have become essential to deal with this problem. In this work, ML techniques are used in the recognition of protein structural classes: Decision Trees, k-Nearest Neighbor, Naive Bayes, Support Vector Machine and Neural Networks. These methods have been chosen because they represent different paradigms of learning and have been widely used in the Bioinfornmatics literature. Aiming to obtain an improvment in the performance of these techniques (individual classifiers), homogeneous (Bagging and Boosting) and heterogeneous (Voting, Stacking and StackingC) multiclassification systems are used. Moreover, since the protein database used in this work presents the problem of imbalanced classes, artificial techniques for class balance (Undersampling Random, Tomek Links, CNN, NCL and OSS) are used to minimize such a problem. In order to evaluate the ML methods, a cross-validation procedure is applied, where the accuracy of the classifiers is measured using the mean of classification error rate, on independent test sets. These means are compared, two by two, by the hypothesis test aiming to evaluate if there is, statistically, a significant difference between them. With respect to the results obtained with the individual classifiers, Support Vector Machine presented the best accuracy. In terms of the multi-classification systems (homogeneous and heterogeneous), they showed, in general, a superior or similar performance when compared to the one achieved by the individual classifiers used - especially Boosting with Decision Tree and the StackingC with Linear Regression as meta classifier. The Voting method, despite of its simplicity, has shown to be adequate for solving the problem presented in this work. The techniques for class balance, on the other hand, have not produced a significant improvement in the global classification error. Nevertheless, the use of such techniques did improve the classification error for the minority class. In this context, the NCL technique has shown to be more appropriated

Algoritmos genéticos aplicados a um comitê de LS-SVM em problemas de classificação

The pattern classification is one of the machine learning subareas that has the most outstanding. Among the various approaches to solve pattern classification problems, the Support Vector Machines (SVM) receive great emphasis, due to its ease of use and good generalization performance. The Least Squares formulation of SVM (LS-SVM) finds the solution by solving a set of linear equations instead of quadratic programming implemented in SVM. The LS-SVMs provide some free parameters that have to be correctly chosen to achieve satisfactory results in a given task. Despite the LS-SVMs having high performance, lots of tools have been developed to improve them, mainly the development of new classifying methods and the employment of ensembles, in other words, a combination of several classifiers. In this work, our proposal is to use an ensemble and a Genetic Algorithm (GA), search algorithm based on the evolution of species, to enhance the LSSVM classification. In the construction of this ensemble, we use a random selection of attributes of the original problem, which it splits the original problem into smaller ones where each classifier will act. So, we apply a genetic algorithm to find effective values of the LS-SVM parameters and also to find a weight vector, measuring the importance of each machine in the final classification. Finally, the final classification is obtained by a linear combination of the decision values of the LS-SVMs with the weight vector. We used several classification problems, taken as benchmarks to evaluate the performance of the algorithm and compared the results with other classifiers

A parentetização: estratégia de construção textual-interativa do chat educacional

Este artigo descreve, sob a Perspectiva Textual-Interativa, tal como definida por Jubran (2006a), a parentetização (JUBRAN, 1996, 2006b) em uma conversação síncrona mediada por computador, voltada para a esfera educacional, escrita em espanhol por participantes brasileiros - o chat educacional. Observamos que a parentetização constitui-se como uma das regularidades dos processos de elaboração textual. Trata-se, portanto, de uma estratégia de construção textual do chat educacional bastante produtiva.

Aí marcador de especificidade de SN indefinidos: um estudo funcionalista com implicações para o ensino

This body of work aims to describe and analyze the behavior of the Aí specificity marker of indefinite Noun Phrases (NP), one of the many functions this linguistic item is developing in contemporary Brazilian Portuguese. From the Functional Linguistic theory perspective, the North American declivity, this project intends to outline the possible grammaticalization trajectory taken by the Aí specificity marker. It will be followed from its function as a spatial deitic up to its integration of indefinite NP, and the action of the fundamental principles of the theory, such as iconicity and informativity, will be observed on the use of this item. Following this, Aí specificity marker behavior will be described in respect to various linguistic and social factors: type of text where the occurrence is encountered, language modality in which the latter is produced, syntactic function developed by the NP specified by Aí , the existence or lack of material intervening between Aí and the NP nuclear noun, informational status of the NP adjugated to Aí , and finally, sex, education and age of the speaker. The occurrence of conversational implicatures will also be verified (GRICE, 1982) within the contexts of Aí specificity marker use. Reflections on the teaching of grammar will be made, as well as on the possibility and validity of working with noun phrase specificity markers in elementary and high school Portuguese language classes. The data used in this research project stem from Corpus Discurso & Gramática A língua falada e escrita na cidade do Natal (FURTADO DA CUNHA, 1998), and from Corpus Discurso & Gramática A língua falada e escrita na cidade do Rio de Janeiro (VOTRE; OLIVEIRA, 1995)

O discurso de outrem em retextualizações

This work investigates features that speakers use to introduce different voices during retextualization of a literary work. It presents events revealing different resources used, characterizing the discursive heterogeneity, recognized through various brands such as quotation marks, italics, etc. The material analyzed, ie, the corpus of this research, consists of 65 essays from the reading of a literary work - Jealous of Card, Moacyr Scliar - produced by students of the 8th year of high school while in the classroom. The data revealed that the resource most used by students was the indirect discourse, although there also occurred the use of other resources such as free indirect discourse and modalizations in fewer redactions. Notably, the autonym connotation was noted through the use of quotation marks, and the use of parentheses. The recurrence of the parentheses seem to be justified by the need to make clearer sentences that could raise questions to the reader, since the protocol request retextualization established a thirty lines of text, which would certainly limit the possibilities of expansion of the text

Referenciação anafórica :as anáforas não-correfereciais no livro didático da língua portuguesa

On recent years, it has been observed an increasing interest on referentiation processes, which involves an important field of Text Linguistics and Discourse Analysis studies. The existence of a significant number of international and national publications which focus on this perspective corroborate this finding. Given the textbook importance as a teaching instrument, and the relevance of the referentiation processes to text production and comprehension, we realize that the study of these two topics articulation is taken as a relevant research theme, with consequences to the improvement of Portuguese Language teaching. Taking this into consideration, we intend to analyze the non-coreference anaphors in texts of Portuguese Language textbooks from fifth to eighth grades, adopted in many schools of Pau dos Ferros RN, considering the frequency, genre, kind of anaphor and manifestation form. This study is classified as a documental and qualitative research. We have found out that the indirect anaphor was used in more than a half of the corpus. We have found out, as well, that the literary and press genres do not favor the use of labeling and metadiscursive anaphors. On the other hand, concerning the indirect anaphor, it is clear its abundant use in the literary genre. In what concerns the manifestation forms, we have verified that on labeling and metadiscursive anaphors it is significant the predominance of demonstrative pronouns working as determiners. On the indirect anaphor, we have verified that most of the occurrences do not present a determiner, and for the ones which present it, the majority occurs under the form of definite and indefinite articles. We believe that this work can contribute to the activities which involve questions related to text production and comprehension, since the referentiation processes are intimately related to them

A (não) assunção da responsabilidade enunciativa no gênero acadêmico artigo científico produzido por alunos do curso de Letras

This research is inserted in Textual Analysis of Discourses (from now on, TAD), elaborated by linguist J-M Adam and developed nowadays by scholars from Brazilian textual linguistic. ATD consists of a theoretical and descriptive perspective from Textual Linguistics that is concerned about a theoretical and methodological position which sets Textual Linguistics in the most extensive Discourse Analysis panorama. In this work, on the enunciative level of text we investigate: the enunciative responsibility (ADAM, 2008) in 14 examples of the academic genre paper published in the journal Ao Pé da Letra and written by university students from degree in Language. The research is oriented by the studies about enunciative responsibility by Adam (2008, 2010), Rabatel (2010), Guentchéva (1994), the perspective of discursive heterogeneity by Authier-Revuz (2004). We established as general objective: (1) Analyzing the occurrence of the (not) assumption of enunciative responsibility in the academic genre paper . The analysis followed the qualitative paradigm on an interpretative basis. The conclusions show, therefore, the excerpts of the discursive genre used to present the analysis reveal a particular nature of using the recourse to the discourse of several knowledge sources that many times can (not) be assumed by the enunciator.

Cartas oficiais norte-riograndenses dos séculos XVIII, XIX e XX : constituição e caracterização de um corpus diacrônico

The diachronic studies marked the first decades of the 20th century in Brazilian linguistics, passing by an ostracism period after the 50s. Mainly from the 90s especially with the project, created in 1997, Para a história do português brasileiro (PHPB), which has systemized, in national ambit, the programme related to the area of diachrony the historical studies retake forces and have gradually increased since then. Our work is set in the new scene of Brazilian historical linguistics and it is associated to two research programmes: i) the constitution of a diachronic corpus; ii) the diachrony of text and discourse. As regards the first programme, we made effort to constitute a diachronic corpus of official letters about Rio Grande do Norte, we called cartas oficiais norte-rio-grandenses, written in 18th, 19th and 20th centuries. The chosen for bureaucrat letters occurred for they represent a textual category very productive in historical contexts, mostly 18th and 19th centuries, in which the command of writing was the least and also because they bring, almost always explicitly, the information of where, when, for whom and from whom, as remembers Fonseca (2003). The rules for constituting the corpus were based, although not strictly, on the orientation from PHPB. In respect to the second programme, we set up on the ideas of coserian base came from the studies on discourse traditions (TD) (Koch, 1997; Kabatek, 2006) amongst which that the texts are shaped so as to follow their own tradition (Coseriu, 2007), and we turned to Diplomatics (Belloto, 2002) in order to do the characterization of this corpus by the application of concepts from Diplomatics and TD as well as by the presentation of the structures that form those official letters: their textual genres, a kind of TD, with their macrostructures; and some of their formulaic expressions (microstructures), another sort of TD. This stage of characterizing will pay attention, as far as possible, to the dynamic between tradition and innovation that happen in the actualization of those textual structures along the centuries. This work intends to contribute with the researches connected to Historical Linguistics in Rio Grande do Norte, more specifically the ones related to the constitution of diachronic corpora and to TD; and with the study of official documents, textual category about which there are almost no studies (cf. Silveira, 2007)

Um olhar dialógico sobre a atividade de revisão de textos escritos: entrelaçamento dizeres e fazeres

This research deals with the activity of text revision. It aims at understanding the work of the text reviewer, taking into consideration the professional experiences of the subjects who work in the area. It s theoretical basis comes from Bakhtin Circle, mainly the concept of verbal interaction formulated from reflections on language used in different spheres of human activities, which implies the notions of discourse genres, alterity, as well as exotopy. The methodology follows the tradition of the qualitative and interpretative research. The data is composed of the statements of text reviewers both in handbooks and interviews, as well as of the description of the researcher s own experience as text reviewer. The results indicate that the revision activity needs to be orientated by a dialogical conception of language, which takes into consideration the interaction between the reviewer and the author, aiming the text finalization

A heterogeneidade discursiva em revistas de divulgação científica

This research aiming at show an interpretative description about the form and function of Scientific Publication (SP) discursive genre, in two magazines of national circulation. We analyzed subjects published from 2004 to 2006, in the magazines Revista do Professor and Revista Nova Escola. We see at SP subjects reported discourses, into its two main presentation forms of other voices: direct discourse and indirect discourse. We have established some aims, first, we analyzing different forms to mark the discursive heterogeneity, by the reason the writer conceptualize an image of his/her interlocutor. The second one, we intend to look at the differences between marked heterogeneity according to the writer production, journalists and researchers, and finally, we investigate more or less occurrence of cited discourse, in what is concerned with different perspectives at communities that produce this kind of text. As theoretical background to our discussions we followed socio-historical perspective, its language and subject discourse conceptualizations. We did it mainly based on Bakhtin s works (1929; 1995; 2003). We were also based on theoretical discussions about discursive heterogeneity by Authier-Revuz (1990; 1998; 2004) and Maingueneau (1993; 2001). At analyzing the social dimensions of our data, we identified as relevant elements in the construction of the subjects (stories) the image that the writer (reporter) did/construct about his/her interlocutor as well as the use of different strategies, for example: the text produced by the journalists frequently use of direct discourse forms, while texts produced by researchers are almost fulfilled by indirect discourse. Beside this, texts are different in their social voices that are in their discourse. In the case of text produced by journalist are predominant the discursive scene of the school agents: teachers, students, parents, among others. Otherwise, in the texts produced by researchers already-said utterances, that in their majority of times, come from scientific discourse

Um ser de lá do sertão e a construção da(s) suas(s) identidade(s) no discurso cancionista nordestino

This work was formulated in order to study the use of words in a specific sphere of human communication - the world of music. From a selection of compositions by Luiz Gonzaga (1912 -1989) and partners, the research goes in search of the identity(ies) of the migrant from Brazilian Northeast's "sertão". The work uses a discursive analysis based on a theoretical framework strongly supported by Mikhail Bakhtin's reflections and whose thread is the theme of migration discussed by Zygmunt Bauman. Thus, this qualitative and interpretivist research focuses on a particular type of text, originating from a specific sphere of human communication that is roughly known as "lyrics" ("words of songs")

O Uso de operações linguístico-discursivas da crítica genética na reescritura de textos

As a professor in Curso de Licenciatura em Letras, from Campus Avançado Profa Maria Eliza Albuquerque Maia (CAMEAM),do Estado do Estado do Rio Grande do Norte (UERN), in the town of Pau do Ferros, in the state of Rio Grande do Norte, we had the chance to carry out several writing activities , as well as guiding re-writing activities for the texts produced. From this experience, we started looking at the need of reflecting upon the writing process in higher education. Thus, we aim at analyzing, in this research, the methodology used in the moment of carrying out the writing practices activities in higher education, investigating, in particular, the rewriting practices, concerning the operations used for carrying out such activities, as well as the sense effects produced from the alterations which were made in the texts. Our theoretical foundation is grounded on a conception of text as a verbal action , what reveals a socio-interactional view of the language (MARCUSCHI, 2008; SAUTCHUK, 2003). As the production of written texts, our research focus, we assume that, for this activity, we deal with distinct figures (active writer and internal reader), so that we can, apart from writing, reflecting upon our writing and, this way, deciding about operations which are carried out to make the alterations which are necessary to the rewriting of our texts (SAUTCHUK, 2003). Still about the theoretical foundations used in this research, we made use of the theories from the Textual Analysis of Discourse (TAD) which discusses the belief on the evidence on the existence of the texts, which is opposite to the fixist view of textuality which believes that the texts exist by themselves. (ADAM, 2008; [2005]2010). Under this perspective, we have also adopted, the concepts which come from genetics criticism which is concerned about the relation between text and genesis, using as objects documents which bring traits of the text in progress, on the ground that the text is the result of work in progress, and the writing practice, on the other hand, as an activity in a continuous movement (HAY, [1975]2002; DE BIASI, [2000]2010; GRÉSILLON, 1989; [1990]2008; [1992]2002; SALLES, 2008a). The methodology in this research is an ethnography-based one, an approach which focuses on the process, as well as is meaning-based. To understand the objectives proposed in our research, we made use of different procedures of collecting data which include an ethnographic study, such as: observation, note-taking, document analysis. The data which were analyzed were collected during the semester of 2008.2, in a first term classroom of Curso de Letras from CAMEAM, when we were able to collect twenty-one written texts and all of them were rewritten based on rewriting activities, what provides a corpus of forty-two texts which will be analyzed based on the linguistics operations identified by Generative Grammar and adopted by Lebrave and Grésillon (2009). From these analyses, we were able to confirm that writing is a process, and rewriting has become an extremely important activity for this process. Still due to these data, we observed that substitution was the most used operation by text authors. We believe that this result is justified by the fact that the substitution, according to what proposes the Genetic Criticism, constitutes the source of all erasure, from which one can easily make a change in writing. Regarding the operations of addition and deletion, we found that they were used in quantitative terms, almost equivalently, which can be explained when we see that the two operations require, by the author of the text, different strategies from those used for the replacement, what includes , respectively, adding or removing a segment. Finally, we found out that the shift operation was the least used, since it works with a segment that will not be replaced, added or deleted, but transferred to another place of text, which requires a greater ability of the author to perform this operation and not compromising the meaning of his/her writing. As a result, we hope to contribute to the reflection on the teaching of writing, considering, in a particular way, those with a Bachelor in Arts. Our analysis will contribute to the teaching of Portuguese language, specifically for activities that guide the production of texts in order to explore with students the ability to rewrite their own text