Este artigo busca compreender qual o estatuto que a ideia de fundamento recebe na filosofia de Sartre enquanto uma ontologia existencial, isto é, enquanto uma filosofia que compreende o homem em sua finitude. Para isso, procura realizar uma análise da presença da Metafísica, sobretudo em O Ser e o Nada, com relação ao problema metafísico desenvolvido na obra: o surgimento do nada no ser. Por fim, procura, por meio desta análise, compreender o estatuto da finitude na mesma obra.

Abstract: The Pull Bayesian Significance Test (FBST) for precise hy- potheses is applied to a Multivariate Normal Structure (MNS) model. In the FBST we compute the evidence against the precise hypothesis. This evi- dence is the probability of the Highest Relative Surprise Set (HRSS) tangent to the sub-manifold (of the parameter space) that defines the null hypothesis. The MNS model we present appears when testing equivalence conditions for genetic expression measurements, using micro-array technology.

No cinema brasileiro recente, o diálogo entre o documentário e a ficção tem merecido destaque, com produções de baixo orçamento e ideias originais. É o caso de Santiago (João Moreira Salles, 2007) e Viajo Porque Preciso, Volto Porque Te Amo (Marcelo Gomes, Karim Aïnouz, 2009), filmes que trabalham esse diálogo de forma sutil e diegética, ressignificando imagens de um arquivo próprio, pessoal.

Much forensic inference based upon DNA evidence is made assuming Hardy-Weinberg Equilibrium (HWE) for the genetic loci being used. Several statistical tests to detect and measure deviation from HWE have been devised, and their limitations become more obvious when testing for deviation within multiallelic DNA loci. The most popular methods-Chi-square and Likelihood-ratio tests-are based on asymptotic results and cannot guarantee a good performance in the presence of low frequency genotypes. Since the parameter space dimension increases at a quadratic rate on (...) the number of alleles, some authors suggest applying sequential methods, where the multiallelic case is reformulated as a sequence of “biallelic” tests. However, in this approach it is not obvious how to assess the general evidence of the original hypothesis; nor is it clear how to establish the significance level for its acceptance/rejection. In this work, we introduce a straightforward method for the multiallelic HWE test, which overcomes the aforementioned issues of sequential methods. The core theory for the proposed method is given by the Full Bayesian Significance Test (FBST), an intuitive Bayesian approach which does not assign positive probabilities to zero measure sets when testing sharp hypotheses. We compare FBST performance to Chi-square, Likelihood-ratio and Markov chain tests, in three numerical experiments. The results suggest that FBST is a robust and high performance method for the HWE test, even in the presence of several alleles and small sample sizes. (shrink)

The Generalized Poisson Distribution (GPD) adds an extra parameter to the usual Poisson distribution. This parameter induces a loss of homogeneity in the stochastic processes modeled by the distribution. Thus, the generalized distribution becomes an useful model for counting processes where the occurrence of events is not homogeneous. This model creates the need for an inferential procedure, to test for the value of this extra parameter. The FBST (Full Bayesian Significance Test) is a Bayesian hypotheses test procedure, capable of providing (...) an evidence measure on sharp hypotheses (where the dimension of the parametric space under the null hypotheses is smaller than that of the full parametric space). The goal of this work is study the empirical properties of the FBST for testing the nullity of extra parameter of the generalized Poisson distribution. Numerical experiments show a better performance of FBST with respect to the classical likelihood ratio test, and suggest that FBST is an efficient and robust tool for this application. (shrink)

t Intentional sampling methods are non-randomized procedures that select a group of individuals for a sample with the purpose of meeting specific prescribed criteria. In this paper we extend previous works related to intentional sampling, and address the problem of sequential allocation for clinical trials with few patients. Roughly speaking, patients are enrolled sequentially, according to the order in which they start the treatment at the clinic or hospital. The allocation problem consists in assigning each new patient to one, and (...) only one, of the alternative treatment arms. The main requisite is that the profiles in the alternative arms remain similar with respect to some relevant patients’ attributes (age, gender, disease, symptom severity and others). We perform numerical experiments based on a real case study and discuss how to conveniently set up perturbation parameters, in order to yield a suitable balance between optimality – the similarity among the relative frequencies of patients in the several categories for both arms, and decoupling – the absence of a tendency to allocate each pair of patients consistently to the same arm. (shrink)

Intentional sampling methods are non-probabilistic procedures that select a group of individuals for a sample with the purpose of meeting specific prescribed criteria. Intentional sampling methods are intended for exploratory research or pilot studies where tight budget constraints preclude the use of traditional randomized representative sampling. The possibility of subsequently generalize statistically from such deterministic samples to the general population has been the issue of long standing arguments and debates. Nevertheless, the intentional sampling techniques developed in this paper explore pragmatic (...) strategies for overcoming some of the real or perceived shortcomings and limitations of intentional sampling in practical applications. (shrink)

The Full Bayesian Significance Test (FBST) for precise hypotheses is presented, with some applications relevant to reliability theory. The FBST is an alternative to significance tests or, equivalently, to p-ualue.s. In the FBST we compute the evidence of the precise hypothesis. This evidence is the probability of the complement of a credible set "tangent" to the sub-manifold (of the para,rreter space) that defines the null hypothesis. We use the FBST in an application requiring a quality control of used components, based (...) on remaining life statistics. (shrink)

Clearing algorithms are at the core of modern payment systems, facilitating the settling of multilateral credit messages with (near) minimum transfers of currency. Traditional clearing procedures use batch processing based on MILP - mixed-integer linear programming algorithms. The MILP approach demands intensive computational resources; moreover, it is also vulnerable to operational risks generated by possible defaults during the inter-batch period. This paper presents TORC3 - the Token-Ring Clearing Algorithm for Currency Circulation. In contrast to the MILP approach, TORC3 is a (...) real time heuristic procedure, demanding modest computational resources, and able to completely shield the clearing operation against the participating agents’ risk of default. (shrink)

This article presents a two level hierarchical forecasting model developed in a consulting project for a Brazilian magazine publishing company. The first level uses a VARMA model and considers econometric variables. The second level takes into account qualitative aspects of each publication issue, and is based on polynomial networks generated by Genetic Programming (GP).

Gene clustering is a useful exploratory technique to group together genes with similar expression levels under distinct cell cycle phases or distinct conditions. It helps the biologist to identify potentially meaningful relationships between genes. In this study, we propose a clustering method based on multivariate normal mixture models, where the number of clusters is predicted via sequential hypothesis tests: at each step, the method considers a mixture model of m components (m = 2 in the first step) and tests if (...) in fact it should be m - 1. If the hypothesis is rejected, m is increased and a new test is carried out. The method continues (increasing m) until the hypothesis is accepted. The theoretical core of the method is the full Bayesian significance test, an intuitive Bayesian approach, which needs no model complexity penalization nor positive probabilities for sharp hypotheses. Numerical experiments were based on a cDNA microarray dataset consisting of expression levels of 205 genes belonging to four functional categories, for 10 distinct strains of Saccharomyces cerevisiae. To analyze the method’s sensitivity to data dimension, we performed principal components analysis on the original dataset and predicted the number of classes using 2 to 10 principal components. Compared to Mclust (model-based clustering), our method shows more consistent results. (shrink)

The Fully Bayesian Significance Test (FBST) is a coherent Bayesian significance test for sharp hypotheses. This paper proposes the FBST as a model selection tool for general mixture models, and compares its performance with Mclust, a model-based clustering software. The FBST robust performance strongly encourages further developments and investigations.

This paper presents REAL, a Real-Valued Attribute Classification Tree Learning Algorithm. Several of the algorithm's unique features are explained by úe users' demands for a decision support tool to be used for evaluating financial operations strategies. Compared to competing algorithms, in our applications, REAL presents maj or advantages : (1) The REAL classification trees usually have smaller error rates. (2) A single conviction (or trust) measure at each leaf is more convenient than the traditional (probability, confidence-level) pair. (3) No need (...) for an external pruning criterion. (shrink)

This article describes the Full Bayesian Significance Test for the problem of separate hypotheses. Numerical experiments are performed for the Gompertz vs. Weibull life span test.

The Fully Bayesian Significance Test (FBST) is a coherent Bayesian significance test for sharp hypotheses. This paper explores the FBST as a model selection tool for general mixture models, and gives some computational experiments for Multinomial-Dirichlet-Normal-Wishart models.

This article gives a conceptual review of the e-value, ev(H|X) – the epistemic value of hypothesis H given observations X. This statistical significance measure was developed in order to allow logically coherent and consistent tests of hypotheses, including sharp or precise hypotheses, via the Full Bayesian Significance Test (FBST). Arguments of analysis allow a full characterization of this statistical test by its logical or compositional properties, showing a mutual complementarity between results of mathematical statistics and the logical desiderata lying at (...) the foundations of this theory. (shrink)

This article aims to analyze the problem of totality in Sartre in its relation with finitude. We begin with the problem of ontological solitude by which we analyze Being as the exteriority of indifference and the event of the it-self or ontological act. Postulating this event as a process of singularization and the life of the individual, we show how the finitude affects totality as totalization and singularization. Image condensed by the singular universal, the finitude, then, is not taken as (...) an isolated totality, but is understood by its opening of the human in the singularization of a life. (shrink)

Our goal was to explore self‐care practices among men who have sex with men in the context of Mpox in Brazil. This study used qualitative research methods, including interviews and thematic analysis, to collect and analyze data from male participants across the Brazilian territory. The narratives unveil men's perspectives on self‐care, risk reduction, and health beliefs during the Mpox pandemic. Our findings highlight a multifaceted approach to self‐care among men, encompassing hygiene, physical contact management, mask usage, skin lesion vigilance, and (...) adherence to official guidelines. Men's attitudes toward sexual behaviors emphasize the importance of reducing sexual partners, practicing safe sex, and combating misinformation through accurate information dissemination. The development of these behaviors and self‐care practices can be facilitated by nurses guided by Dorothea Orem's Self‐Care Theory, supported by patient‐centered care, with strategies to address and confront the stigma associated with the disease and provide emotional support. Thus, the study underscores the pivotal role of self‐care in mitigating infection risks, especially in the context of emerging infectious diseases. It acknowledges the impact of socio‐cultural factors and healthcare policies on men's preventive measures. However, it also recognizes limitations, such as potential bias due to stigma concerns and a nonrepresentative sample. Ultimately, the research advocates for tailored education, promotion of gender equity, and healthcare empowerment to effectively manage health risks in such contexts. (shrink)

This article aims to analyze in Sartre's philosophy the relation between the subjectivities from the notion of understanding. Differentiating knowledge of understanding, Sartre proposes that by understanding it is possible to apprehend subjectivity without making it an objective knowledge. Although he points this in several of his studies is the conference on Kierkegaard that this thesis becomes more manifest. In this article we try to demonstrate that this thesis modifies a whole perception about the freedom, so that it as a (...) singularity has a transhistorical dimension, at the same time that it can only be taken, in its own finitude, by understanding. This thesis does not contradict those of the ontology, but, rightly, legitimates the Being as finitude. Finally, freedom is not denoted as an objective knowledge, but as an invitation to understanding ourselves. (shrink)

This article aims to analyze in Sartre's philosophy the notion of personalization. Inserted in the framework of existential psychoanalysis, this notion elucidates about the original choice and the existential project. Since his first works, Sartre has presented an impersonal transcendental conscience, so that freedom as nadification is independent of psychic life. We want to demonstrate that from the development of existential psychoanalysis freedom is not separated from the notion of personalization, but presupposes it due to the finitude condition of freedom. (...) In this case, although it presupposes an impersonal transcendental field, freedom can only be apprehended concretely through personalization. This presupposes a necessary relationship between ontology and existential psychoanalysis in the elucidation of freedom, history, and the man. (shrink)

Este artigo tem por objetivo analisar a noção de finitude na obra de Sartre como base para a antropologia existencial desenvolvida nela. Perpassando desde O ser e o nada até as últimas entrevistas, discutimos tal tese a partir das análises, sobretudo, de Bornheim, Moutinho e Mészáros. Para isso, num primeiro momento discute a relação entre ser, finitude e negação. Num segundo momento, associamos a noção de finitude com a de singularidade e como por ela é estabelecida a relação entre ontologia, (...) história e psicanálise existencial. Por fim, afere ao jogo dos irredutíveis como a dinâmica própria que subjaz à antropologia existencial. (shrink)

Resumo: Este artigo tem por objetivo apontar uma relação entre a estética e a ética em Sartre, mostrando que a constituição ética do indivíduo não se distingue da sua constituição estética. Primeiramente, parte-se da crítica que Merle faz em seu artigo à psicanálise existencial e se evidencia como o encontro com a história e a postulação de uma teoria da personalização nas obras biográficas destituem tais críticas. Num segundo momento, legitimam-se as postulações anteriores, apontando-se como na obra Saint Genet Sartre (...) ratifica a constituição do gosto sobre a moral pelo processo de personalização. Por fim, será visto que toda ética tem um pressuposto transgressor, na medida em que o sujeito ético é também sujeito estético.: This article aims to point out a relation between aesthetics and ethics in Sartre, showing that the ethical constitution of the individual does not distinguish from his or her aesthetic constitution. First, we start from Merle’s criticism of existential psychoanalysis, and we show how such criticisms can be dismissed on the basis of the encounter with history and the postulation of a theory of personalization in biographical works. Second, we point out how Sartre, in his Saint Genet, ratifies the constitution of a taste regarding the moral by the process of personalization. Finally, we will see that all ethics have a transgressive presupposition insofar as the ethical subject is also an aesthetic subject. (shrink)

Este artigo tem por objetivo analisar uma das críticas de Mészáros à Sartre, qual seja, a da determinação negativa da totalidade. Partindo da distinção entre real e irreal regressamos à discussão entre o real e o imaginário e indicamos um terceiro elemento, o possível, como tessitura do real. O possível afere ao real como um movimento e denota este enquanto totalização. Assim, sempre como processo e possibilidade, o real e o total são compreendidos segundo a liberdade própria do sujeito.

O objetivo deste artigo é apresentar a noção de criação no pensamento de Sartre. Tal noção não é predominante nos primeiros textos. Procuramos demostrar seu lugar no pensamento do filósofo. Primeiramente recorremos ao texto dos Cahiers pour une morale onde tal noção ocupa um lugar fundamental. Em seguida, mostramos como tal análise é retomada sobretudo na Critique de la Raison Dialectique. Tal análise explicitará o teor da criação como processo de singularização, de modo que o ser do indivíduo ou sua (...) liberdade seja tomada enquanto uma qualidade singular, ou ainda, como sentido do ser enquanto finitude. Por fim, que essa configuração alude às relações segundo sua doação e generosidade enquanto existência no mundo. (shrink)

Este artigo tem por objetivo analisar os princípios da ontologia de Sartre. Partindo da discussão acerca do fundamento e da separação entre ser e nada, e ser e fenômeno, procuramos ressaltar a unidade sintética de tais princípios a partir da finitude e do indivíduo. Este movimento permite compreender o caráter prático desta filosofia e a forma própria da ontologia de Sartre, a saber, como uma antropologia existencial.

O objetivo deste artigo é mostrar como na filosofia de Sartre o processo de personalização coaduna com o processo de singularização. Para isso explora-se a tese da transcendência do ego e a ideia de identidade na filosofia de Sartre, tendo como fundo a discussão sobre a liberdade e alienação. Em seguida mostra como pela noção de vivência foi possível reinterpretar tal jogo. Por fim afere à singularização como tessitura própria do sujeito livre.

Inspired by the recent work on approximations of classical logic, we present a method that approximates several modal logics in a modular way. Our starting point is the limitation of the n-degree of introspection that is allowed, thus generating modaln-logics. The semantics for n-logics is presented, in which formulas are evaluated with respect to paths, and not possible worlds. A tableau-based proof system is presented, n-SST, and soundness and completeness is shown for the approximation of modal logics image and image.

Urban development is seen in this paper as the process of achieving more social justice in the city through changes both in social relations and in spatiality. Autonomy, in the sense used by Cornelius Castoriadis, is here regarded as the main parameter for the evaluation of processes and strategies for positive social change. Nevertheless, the Castoriadian philosophical notion of autonomy must first be made operational before it can be reasonably applied in empirical research or policy evaluations. The aim of the (...) paper is to contribute to this operationalisation, specifically considering the role of urban planning and management in the realisation of urban development. (shrink)

Urban development is seen in this paper as the process of achieving more social justice in the city through changes both in social relations and in spatiality. Autonomy, in the sense used by Cornelius Castoriadis, is here regarded as the main parameter for the evaluation of processes and strategies for positive social change. Nevertheless, the Castoriadian philosophical notion of autonomy must first be made operational before it can be reasonably applied in empirical research or policy evaluations. The aim of the (...) paper is to contribute to this operationalisation, specifically considering the role of urban planning and management in the realisation of urban development. (shrink)

O presente artigo analisa os sentidos abstratos para a soberania do povo como pressuposto para a fixação de sentidos concretos para a democracia participativa em um Estado de Direito. A temática é abordada pelo método dedutivo, por meio de pesquisa doutrinária e de diplomas normativos. O artigo pretende responder em que medida se afigura possível estabelecer bases de racionalidade para a construção de um discurso compatível com os direitos de participação política em um Estado Democrático de Direito.

O livro almeja ser representativo nos principais debates contemporâneos, oferecendo uma visão panorâmica sobre o campo na atualidade e permitindo-se aprofundar em algumas discussões selecionadas.O ambiente não pode ser reduzido ao “meio ambiente”, à natureza não humana. Ele não é meramente algo que “nos envolve”, um envoltório: o ambiente somos também nós, seres humanos, histórica e culturalmente situados. Quanto aos territórios, eles se estabelecem em íntima conexão com os ambientes em suas dimensões paisagística e material, quer sejam os processos geoecológicos, (...) quer sejam as formas e as dinâmicas socialmente produzidas. Analisar os territórios significa examinar como, a cada momento, os ambientes, seus recursos e significados são disputados e viram objeto de conflitos.O público-alvo principal são os estudantes dos últimos anos da graduação, além daqueles em nível de pós-graduação, de todas as áreas que lidam com problemas e conflitos ambientais. Afora os pesquisadores iniciantes e os jovens universitários em geral, porém, podemos presumir que profissionais experientes também poderão tirar proveito do material de diversos capítulos. É razoável, por fim, nutrir a expectativa de que muito do que este livro contém possa (retro)alimentar o ativismo ambiental crítico e a prática de combater as iniquidades e as distorções que se acumulam em nossas sociedades, principalmente as muitas situações de flagrante injustiça ambiental. (shrink)

Part two of an innovative trilogy on anarchist geography, this text examines how we can better understand the ways in which space has been used for resistance.

Esta pesquisa teve como objetivo analisar o conhecimento teórico de conselhos tutelares sobre o Estatuto da Criança e do Adolescente e suas atuações a partir disso. Para isso, realizamos entrevistas com dois conselhos por meio de um questionário. As respostas foram dadas por escrito e, com elas, pudemos notar convergências e divergências entre esses conselhos. Com a análise, percebemos que cada conselho possui um olhar no seu trabalho, porém ambos possuem consciência de que seu dever é o de proteger e (...) garantir os direitos das crianças e dos adolescentes. Ambos os conselhos admitiram existir interação com a escola, porém, ela se restringe ao controle de frequência e da evasão escolar. Também, ambos remetem casos de violação de direitos à realidade social, afirmando que fatores econômicos não são determinantes nesses atos, porém, nos casos de famílias em situações econômicas desfavoráveis, o conselho tutelar é acionado. Por fim, enquanto um dos conselhos diz que aquele que viola algum direito da criança ou do adolescente deve ser responsabilizado, outro afirma que ele deve intervir com medidas educativas para resgatas a proteção do menor. Concluímos que os conselhos conhecem seus deveres, porém deixam a desejar no que tange à relação com as escolas. (shrink)

Inicialmente, o texto indaga sobre o significado do exercício do filósofo social; pretende também localizar as origens do debate moderno sobre ‘subjetividade’ no pensamento filosófico e social. As idéias norteadoras de Kant, se situam na confluência e na disjunção entre razão (conhecimento) e subjetividade (moral). A partir dessa referência, o debate entre alguns pensadores considerados como pós-modernos (Badiou e Zizek), por um lado, e por outro Castoriadis que recusa esta nomenclatura, vão derivando idéias novas sobre ‘sujeito’ e ‘verdade’. Esse debate (...) não é sem conseqüências para a teoria sociológica que assume para si o desafio de introduzir a categoria de ‘sujeito’ em seus cânones (Touraine). As reflexões de Stengers servem também para questionar e aproximar as práticas da produção do conhecimento e dos discursos científicos. Finalmente, restam desafios para se pensar teorias e práticas sócio-ambientais à luz desses conceitos apresentados ao longo do texto. (shrink)

SOUZA, Ricardo Timm de, Totalidade e Desagregação - sobre as fronteiras do pensamento e suas alternativas. EDIPUCRS, 1996. Uma obra no "espírito do tempo" e que, segundo o autor e especialista no pensamento e cultura do século XX, parte da intuição profunda de um "espírito de urgência". Para isto, assume a radicalidade da desinstalação epistemológica atual, fruto da ruptura de toda uma vontade otimista de Sistema, de posturas iluministas, e denuncia as peripécias teóricas e violências da Totalidade. Crise do (...) grande Sistema de sentido do ocidente grego, crise da sua totalização efetiva a nível político-econômico, em tempos de sufocamento global. Tempo de desagregação, o que não quer restar mera ação pós-moderna, mas intertísticos às voltas com as fronteiras do pensado e as suas alternativas radicais - filosofia como crítica e não tautologia legitimadora. Esta pretensiosa proposição, inspirada no pensamento de Ernmanuel Levinas, esboça- se em todos os cinco artigos da primeira parte crítica, cristalizando-se melhor nos seis artigos da segunda parte - "fronteiras e alternativas". No primeiro bloco, do status crucial da fundamentação do pensamento no século XX, se passa pela "Escola de Frankfurt'', Nietzsche, Sartre, para desembocar nas análises concretas do "fim da história" dentro da nova "ordem" neoliberal. No segundo bloco, se percorre a ética da economia, filosofia da natureza e questão ecológica, alteridade e Estética, desembocando no "traumatismo e Infinito" - pequeno e arrojado esboço do tema de tese de doutorado do autor. Estamos aqui não menos que diante de um mesmo desafio em onze momentos. (shrink)

Multialgebras have been much studied in mathematics and in computer science. In 2016 Carnielli and Coniglio introduced a class of multialgebras called swap structures, as a semantic framework for dealing with several Logics of Formal Inconsistency that cannot be semantically characterized by a single finite matrix. In particular, these LFIs are not algebraizable by the standard tools of abstract algebraic logic. In this paper, the first steps towards a theory of non-deterministic algebraization of logics by swap structures are given. Specifically, (...) a formal study of swap structures for LFIs is developed, by adapting concepts of universal algebra to multialgebras in a suitable way. A decomposition theorem similar to Birkhoff’s representation theorem is obtained for each class of swap structures. Moreover, when applied to the 3-valued algebraizable logics J3 and Ciore, their classes of algebraic models are retrieved, and the swap structures semantics become twist structures semantics. This fact, together with the existence of a functor from the category of Boolean algebras to the category of swap structures for each LFI, suggests that swap structures can be seen as non-deterministic twist structures. This opens new avenues for dealing with non-algebraizable logics by the more general methodology of multialgebraic semantics. (shrink)

Despite being fairly powerful, finite non-deterministic matrices are unable to characterize some logics of formal inconsistency, such as those found between mbCcl and Cila. In order to overcome this limitation, we propose here restricted non-deterministic matrices (in short, RNmatrices), which are non-deterministic algebras together with a subset of the set of valuations. This allows us to characterize not only mbCcl and Cila (which is equivalent, up to language, to da Costa's logic C_1) but the whole hierarchy of da Costa's calculi (...) C_n. This produces a novel decision procedure for these logics. Moreover, we show that the RNmatrix semantics proposed here induces naturally a labelled tableau system for each C_n, which constitutes another decision procedure for these logics. This new semantics allows us to conceive da Costa's hierarchy of C-systems as a family of (non deterministically) (n+2)-valued logics, where n is the number of "inconsistently true" truth-values and 2 is the number of "classical" or "consistent" truth-values, for every C_n. (shrink)

A organizadora explica que tudo começou com um desafio: criar uma visão abrangente da obra de Paulo Freire, retomando seus temas mais queridos - o diálogo e a partilha na construção de um mundo novo e a prática educativa transformadora e libertadora. O Grupo de Estudos e Pesquisas em Paulo Freire aceitou a proposta, produzindo coletivamente textos que dialogam com as principais obras e ideias do mestre numa linguagem acessível, voltada aos militantes dos movimentos sociais e das escolas no Brasil. (...) Selecionado pela Fundação Biblioteca Nacional - programa Livro Aberto - para conhecer o Paulo Freire que defende que temos o dever de mudar o mundo. O livro inclui três textos de Paulo Freire em diálogo com educadores e educandos do campo e da cidade: Extensão e invasão cultural; Reforma agrária: transformação cultural e o papel do agrônomo educador; Carta do direito e do dever de mudar o mundo. (shrink)