Results for 'Júlio Santos'

435 found
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  1. Bottom Up Ethics - Neuroenhancement in Education and Employment.Imre Bard, George Gaskell, Agnes Allansdottir, Rui Vieira da Cunha, Peter Eduard, Juergen Hampel, Elisabeth Hildt, Christian Hofmaier, Nicole Kronberger, Sheena Laursen, Anna Meijknecht, Salvör Nordal, Alexandre Quintanilha, Gema Revuelta, Núria Saladié, Judit Sándor, Júlio Borlido Santos, Simone Seyringer, Ilina Singh, Han Somsen, Winnie Toonders, Helge Torgersen, Vincent Torre, Márton Varju & Hub Zwart - 2018 - Neuroethics 11 (3):309-322.
    Neuroenhancement involves the use of neurotechnologies to improve cognitive, affective or behavioural functioning, where these are not judged to be clinically impaired. Questions about enhancement have become one of the key topics of neuroethics over the past decade. The current study draws on in-depth public engagement activities in ten European countries giving a bottom-up perspective on the ethics and desirability of enhancement. This informed the design of an online contrastive vignette experiment that was administered to representative samples of 1000 respondents (...)
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  2. Bottom Up Ethics - Neuroenhancement in Education and Employment.Hub Zwart, Márton Varju, Vincent Torre, Helge Torgersen, Winnie Toonders, Han Somsen, Ilina Singh, Simone Seyringer, Júlio Santos, Judit Sándor, Núria Saladié, Gema Revuelta, Alexandre Quintanilha, Salvör Nordal, Anna Meijknecht, Sheena Laursen, Nicole Kronberger, Christian Hofmaier, Elisabeth Hildt, Juergen Hampel, Peter Eduard, Rui Cunha, Agnes Allansdottir, George Gaskell & Imre Bard - 2018 - Neuroethics 11 (3):309-322.
    Neuroenhancement involves the use of neurotechnologies to improve cognitive, affective or behavioural functioning, where these are not judged to be clinically impaired. Questions about enhancement have become one of the key topics of neuroethics over the past decade. The current study draws on in-depth public engagement activities in ten European countries giving a bottom-up perspective on the ethics and desirability of enhancement. This informed the design of an online contrastive vignette experiment that was administered to representative samples of 1000 respondents (...)
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  3. Panorama contemporáneo de la Lingüística y la Literatura en Chile. Entrevista a Victoria Espinosa Santos, miembro de la Academia Chilena de la Lengua.Jesús Miguel Delgado Del Aguila - 2022 - Boletín GEC 30 (30):197-204.
    Victoria Espinosa Santos es miembro de la Academia Chilena de la Lengua desde 2017 y forma parte de la Comisión de Lexicografía. Esta entrevista, realizada de forma virtual el 6 de julio de 2021, se concentra en los siguientes temas: las variaciones del español de América, el rol de las lenguas indígenas en el español de Chile, el trabajo de las academias de la Lengua Española, el rol de las academias en relación con la lingüística y la literatura.
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  4. In Memoriam. Francisco De Asís Chavero Blanco O.F.M. . El Estudio Hecho Espíritu.Manuel Lázaro - 2001 - Revista Española de Filosofía Medieval 8.
    El día dieciséis de julio de este año, un día después de la festividad de san Buenaventura, este santo franciscano, doctor de la Iglesia, recibió un regalo: una de las personas que aquí y ahora más conocía de su obra, pensamiento y fuentes, iba a ir a visitarlo. Ambos tenían, al fin, la oportunidad de conocerse en persona. Para sus amigos fue un regalo muy caro. Nuestro amigo Francisco de Asís Clavero Blanco nos dejó físicamente, pero sus estudios y su (...)
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  5. O que é metafísica.Jaimir Conte & Oscar Federico Bauchwitz - 2011 - Natal, RN, Brasil: Editora da UFRN.
    Atas do III Colóquio Internacional de Metafísica. [ISBN 978-85-7273-730-2]. Sumário: 1. Prazer, desejo e amor-paixão no texto de Lucrécio, por Antonio Júlio Garcia Freire; 2. Anaximandro: física, metafísica e direito, por Celso Martins Azar Filho; 3. Carta a Guimarães Rosa, por Cícero Cunha Bezerra; 4. Ante ens, non ens: La primacía de La negación em El neoplatonismo medievel, por Claudia D’Amico; 5. Metafísica e neoplatonismo, por David G. Santos; 6. Movimento e tempo no pensamento de Epicuro, por Everton (...)
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  6. Discurso de Julio Michael Stern por Ocasiao da Posse da cadeira 18 da Academia Brasileira de Filosofia.Julio Michael Stern - 2023 - In Edgard Leite (ed.), 200 Anos de Independencia e 33 mos de Academia Brasileira de Filosofia. FAPERJ. pp. 211-224.
    Inauguration speech at chair number 18 of the Brasilian Academy of Philosophy.
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  7. Significance Tests, Belief Calculi, and Burden of Proof in Legal and Scientific Discourse.Julio Michael Stern - 2003 - Frontiers in Artificial Intelligence and Applications 101:139-147.
    We review the definition of the Full Bayesian Significance Test (FBST), and summarize its main statistical and epistemological characteristics. We review also the Abstract Belief Calculus (ABC) of Darwiche and Ginsberg, and use it to analyze the FBST’s value of evidence. This analysis helps us understand the FBST properties and interpretation. The definition of value of evidence against a sharp hypothesis, in the FBST setup, was motivated by applications of Bayesian statistical reasoning to legal matters where the sharp hypotheses were (...)
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  8. (1 other version)Jacob’s Ladder: Logics of Magic, Metaphor and Metaphysics.Julio Michael Stern - 2020 - Sophia 59 (2):365-385.
    In this article, we discuss some issues concerning magical thinking—forms of thought and association mechanisms characteristic of early stages of mental development. We also examine good reasons for having an ambivalent attitude concerning the later permanence in life of these archaic forms of association, and the coexistence of such intuitive but informal thinking with logical and rigorous reasoning. At the one hand, magical thinking seems to serve the creative mind, working as a natural vehicle for new ideas and innovative insights, (...)
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  9. Continuous versions of Haack’s puzzles: equilibria, eigen-states and ontologies.Julio Michael Stern - 2017 - Logic Journal of the IGPL 25 (4):604-631.
    This article discusses some continuous limit cases of Susan Haack’s crossword puzzle metaphor for the coherent development and foundation of science. The main objective of this discussion is to build a bridge between Haack’s foundherentism and the epistemological framework of objective cognitive constructivism, including its key metaphor of objects as tokens for eigen-solutions. The historical development of chemical affinity tables is used to illustrate our arguments.
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  10. Hacia una noción de interpretación en la ciencia: anotaciones críticas al planteamiento de N. R. Hanson.Julio Horta - 2016 - Interpretatio. Revista de Hermenéutica 1 (2): 89-118.
    Abstract: In the present work we have made a critical review of the philosophical propo­ sal of Norwood R. Hanson with the aim of exposing the limits of its theoretical approach on the problem of interpretation in science. The first part of this work exposes the hansonian project, looking for evidence of his contributions to the philosophy of science and scientific thinking. In the following two sections we present a critique to his philosophical proposal. We present two exercises of philosophical (...)
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  11. Ludwig Wittgenstein: las fronteras del significado.Julio Horta - 2013 - Revista de Filosofia (Universidad Iberoamericana) 2 (134):203-214.
    Abstract This essay seeks to realize the following question: what is the correspondence between the sign and the thing that names? In reality, what is significant is closely linked with the being, however in this case the sense will be a particular manifestation of an own subjectivity; therefore the determinant relation is limited to the capacity of representation, where the meaning is connected with the socio-cultural sense. In this regard, this work seek realize this problem from the analytical approach of (...)
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  12. Cointegration: Bayesian Significance Test Communications in Statistics.Julio Michael Stern, Marcio Alves Diniz & Carlos Alberto de Braganca Pereira - 2012 - Communications in Statistics 41 (19):3562-3574.
    To estimate causal relationships, time series econometricians must be aware of spurious correlation, a problem first mentioned by Yule (1926). To deal with this problem, one can work either with differenced series or multivariate models: VAR (VEC or VECM) models. These models usually include at least one cointegration relation. Although the Bayesian literature on VAR/VEC is quite advanced, Bauwens et al. (1999) highlighted that “the topic of selecting the cointegrating rank has not yet given very useful and convincing results”. The (...)
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  13. Symmetry, Invariance and Ontology in Physics and Statistics.Julio Michael Stern - 2011 - Symmetry 3 (3):611-635.
    This paper has three main objectives: (a) Discuss the formal analogy between some important symmetry-invariance arguments used in physics, probability and statistics. Specifically, we will focus on Noether’s theorem in physics, the maximum entropy principle in probability theory, and de Finetti-type theorems in Bayesian statistics; (b) Discuss the epistemological and ontological implications of these theorems, as they are interpreted in physics and statistics. Specifically, we will focus on the positivist (in physics) or subjective (in statistics) interpretations vs. objective interpretations that (...)
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  14. Verstehen (causal/interpretative understanding), Erklaeren (law-governed description/prediction), and Empirical Legal Studies.Julio Michael Stern - 2018 - Journal of Institutional and Theoretical Economics 174:105-114.
    Comments presented at the 35th International Seminar on the -- New Institutional Economics -- Empirical Methods for the Law; Syracuse, 2018.
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  15. (1 other version)Color-Coded Epistemic Modes in a Jungian Hexagon of Opposition.Julio Michael Stern - 2022 - In Jean-Yves Beziau & Ioannis Vandoulakis (eds.), The Exoteric Square of Opposition. Birkhauser.
    This article considers distinct ways of understanding the world, referred to in psychology as Functions of Consciousness or as Cognitive Modes, having as the scope of interest epistemology and natural sciences. Inspired by C.G. Jung's Simile of the Spectrum, we consider three basic cognitive modes associated to: (R) embodied instinct, experience, and action; (G) reality perception and learning; and (B) concept abstraction, rational thinking, and language. RGB stand for the primary colors: red, green, and blue. Accordingly, a conceptual map between (...)
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  16. Cognitive Constructivism, Eigen-Solutions, and Sharp Statistical Hypotheses.Julio Michael Stern - 2007 - Cybernetics and Human Knowing 14 (1):9-36.
    In this paper epistemological, ontological and sociological questions concerning the statistical significance of sharp hypotheses in scientific research are investigated within the framework provided by Cognitive Constructivism and the FBST (Full Bayesian Significance Test). The constructivist framework is contrasted with the traditional epistemological settings for orthodox Bayesian and frequentist statistics provided by Decision Theory and Falsificationism.
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  17. Constructive Verification, Empirical Induction, and Falibilist Deduction: A Threefold Contrast.Julio Michael Stern - 2011 - Information 2 (4):635-650.
    This article explores some open questions related to the problem of verification of theories in the context of empirical sciences by contrasting three epistemological frameworks. Each of these epistemological frameworks is based on a corresponding central metaphor, namely: (a) Neo-empiricism and the gambling metaphor; (b) Popperian falsificationism and the scientific tribunal metaphor; (c) Cognitive constructivism and the object as eigen-solution metaphor. Each of one of these epistemological frameworks has also historically co-evolved with a certain statistical theory and method for testing (...)
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  18. The Logical Consistency of Simultaneous Agnostic Hypothesis Tests.Julio Michael Stern - 2016 - Entropy 8 (256):1-22.
    Simultaneous hypothesis tests can fail to provide results that meet logical requirements. For example, if A and B are two statements such that A implies B, there exist tests that, based on the same data, reject B but not A. Such outcomes are generally inconvenient to statisticians (who want to communicate the results to practitioners in a simple fashion) and non-statisticians (confused by conflicting pieces of information). Based on this inconvenience, one might want to use tests that satisfy logical requirements. (...)
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  19. Universidad y Tradición: notaciones sobre el contexto referencial de la racionalidad universitaria.Julio Horta - 2012 - Revista Mexicana de Ciencias Políticas y Sociales (UNAM) 51 (214):25-53.
    This paper presents a central thesis: that humanistic language is the idiomatic context in which the Wes­ tern cultural universe orworld has existence, and, by extension, where the academic world has existence and sense. In this frame, the authors analyze two main topics: a) the way in which meaning units, that name the referent University, articulate and orga­ nize humanistic contents that adjust along to the academic world which men have been postulating throughout history; and b) the evidence of inherited (...)
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  20. Language and the Self-Reference Paradox.Julio Michael Stern - 2007 - Cybernetics and Human Knowing 14 (4):71-92.
    Heinz Von Forester characterizes the objects “known” by an autopoietic system as eigen-solutions, that is, as discrete, separable, stable and composable states of the interaction of the system with its environment. Previous articles have presented the FBST, Full Bayesian Significance Test, as a mathematical formalism specifically designed to access the support for sharp statistical hypotheses, and have shown that these hypotheses correspond, from a constructivist perspective, to systemic eigen-solutions in the practice of science. In this article several issues related to (...)
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  21. Paraconsistent Sensitivity Analysis for Bayesian Significance Tests.Julio Michael Stern - 2004 - Lecture Notes in Artificial Intelligence 3171:134-143.
    In this paper, the notion of degree of inconsistency is introduced as a tool to evaluate the sensitivity of the Full Bayesian Significance Test (FBST) value of evidence with respect to changes in the prior or reference density. For that, both the definition of the FBST, a possibilistic approach to hypothesis testing based on Bayesian probability procedures, and the use of bilattice structures, as introduced by Ginsberg and Fitting, in paraconsistent logics, are reviewed. The computational and theoretical advantages of using (...)
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  22. Assessing Randomness in Case Assignment: The Case Study of the Brazilian Supreme Court.Julio Michael Stern, Diego Marcondes & Claudia Peixoto - 2019 - Law, Probability and Risk 18 (2/3):97-114.
    Sortition, i.e. random appointment for public duty, has been employed by societies throughout the years as a firewall designated to prevent illegitimate interference between parties in a legal case and agents of the legal system. In judicial systems of modern western countries, random procedures are mainly employed to select the jury, the court and/or the judge in charge of judging a legal case. Therefore, these random procedures play an important role in the course of a case, and should comply with (...)
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  23. Logically-consistent hypothesis testing and the hexagon of oppositions.Julio Michael Stern, Rafael Izbicki, Luis Gustavo Esteves & Rafael Bassi Stern - 2017 - Logic Journal of the IGPL 25 (5):741-757.
    Although logical consistency is desirable in scientific research, standard statistical hypothesis tests are typically logically inconsistent. To address this issue, previous work introduced agnostic hypothesis tests and proved that they can be logically consistent while retaining statistical optimality properties. This article characterizes the credal modalities in agnostic hypothesis tests and uses the hexagon of oppositions to explain the logical relations between these modalities. Geometric solids that are composed of hexagons of oppositions illustrate the conditions for these modalities to be logically (...)
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  24. A sharper image: the quest of science and recursive production of objective realities.Julio Michael Stern - 2020 - Principia: An International Journal of Epistemology 24 (2):255-297.
    This article explores the metaphor of Science as provider of sharp images of our environment, using the epistemological framework of Objective Cognitive Constructivism. These sharp images are conveyed by precise scientific hypotheses that, in turn, are encoded by mathematical equations. Furthermore, this article describes how such knowledge is pro-duced by a cyclic and recursive development, perfection and reinforcement process, leading to the emergence of eigen-solutions characterized by the four essential properties of precision, stability, separability and composability. Finally, this article discusses (...)
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  25. Spencer-Brown vs. Probability and Statistics: Entropy’s Testimony on Subjective and Objective Randomness.Julio Michael Stern - 2011 - Information 2 (2):277-301.
    This article analyzes the role of entropy in Bayesian statistics, focusing on its use as a tool for detection, recognition and validation of eigen-solutions. “Objects as eigen-solutions” is a key metaphor of the cognitive constructivism epistemological framework developed by the philosopher Heinz von Foerster. Special attention is given to some objections to the concepts of probability, statistics and randomization posed by George Spencer-Brown, a figure of great influence in the field of radical constructivism.
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  26. Jacob's Ladder and Scientific Ontologies.Julio Michael Stern - 2014 - Cybernetics and Human Knowing 21 (3):9-43.
    The main goal of this article is to use the epistemological framework of a specific version of Cognitive Constructivism to address Piaget’s central problem of knowledge construction, namely, the re-equilibration of cognitive structures. The distinctive objective character of this constructivist framework is supported by formal inference methods of Bayesian statistics, and is based on Heinz von Foerster’s fundamental metaphor of objects as tokens for eigen-solutions. This epistemological perspective is illustrated using some episodes in the history of chemistry concerning the definition (...)
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  27. Otimizacao e Processos Estocasticos Aplicados a Economia e Financas.Julio Michael Stern - manuscript
    Optimization and Stochastic Processes Applied to Economy and Finance. Textbook for the BM&F-USP (Brazilian Mercantile and Futures Exchange - University of Sao Paulo) Master's degree program in Finance.
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  28. (1 other version)Practice oriented controversies and borrowed epistemic support in current evolutionary biology. The case of phylogeography.Alfonso Arroyo-Santos, Mark E. Olson & Francisco Vergara-Silva - 2015 - Perspectives on Science 23 (3):310-334.
    Although there is increasing recognition that theory and practice in science are often inseparably intertwined, discussions of scientific controversies often continue to focus on theory, and not practice or methodologies. As a contribution to constructing a framework towards understanding controversies linked to scientific practices, we introduce the notion of borrowed epistemic credibility, to describe the situation in which scientists exploit fallacious similarities between accepted tenets in other fields to garner support for a given position in their own field. Our proposal (...)
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  29. Pragmatic Hypotheses in the Evolution of Science.Julio Michael Stern, Luis Gustavo Esteves, Rafael Izbicki & Rafael Stern - 2019 - Entropy 21 (9):1-17.
    This paper introduces pragmatic hypotheses and relates this concept to the spiral of scientific evolution. Previous works determined a characterization of logically consistent statistical hypothesis tests and showed that the modal operators obtained from this test can be represented in the hexagon of oppositions. However, despite the importance of precise hypothesis in science, they cannot be accepted by logically consistent tests. Here, we show that this dilemma can be overcome by the use of pragmatic versions of precise hypotheses. These pragmatic (...)
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  30. Auditable Blockchain Randomization Tool.Julio Michael Stern & Olivia Saa - 2019 - Proceedings 33 (17):1-6.
    Randomization is an integral part of well-designed statistical trials, and is also a required procedure in legal systems. Implementation of honest, unbiased, understandable, secure, traceable, auditable and collusion resistant randomization procedures is a mater of great legal, social and political importance. Given the juridical and social importance of randomization, it is important to develop procedures in full compliance with the following desiderata: (a) Statistical soundness and computational efficiency; (b) Procedural, cryptographical and computational security; (c) Complete auditability and traceability; (d) Any (...)
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  31. LA ESTÉTICA COMO ENFOQUE DE ANÁLISIS DEL OBJETO DE DISEÑO PARA UN MUNDO SOSTENIBLE.Julio César Arámbula Meneses & Ana Aurora Maldonado Reyes - 2023 - Aproximaciones Del Diseño Para la Inclusión Social.
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  32. Bayesian Evidence Test for Precise Hypotheses.Julio Michael Stern - 2003 - Journal of Statistical Planning and Inference 117 (2):185-198.
    The full Bayesian signi/cance test (FBST) for precise hypotheses is presented, with some illustrative applications. In the FBST we compute the evidence against the precise hypothesis. We discuss some of the theoretical properties of the FBST, and provide an invariant formulation for coordinate transformations, provided a reference density has been established. This evidence is the probability of the highest relative surprise set, “tangential” to the sub-manifold (of the parameter space) that defines the null hypothesis.
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  33. Echo Chambers, Ignorance and Domination.Breno Santos - 2021 - Social Epistemology 35 (2):109-119.
    My aim in this paper is to engage with C. Thi Nguyen’s characterization of the echo chamber and to propose two things. First, I argue that a proper reading of his concept of echo chamber should make use of the notion of ignorance in the form of a structural epistemic insensitivity. My main contention is that ignorance as a substantive structural practice accounts for the epistemically deleterious effects of echo chambers. Second, I propose that from the talk of ignorance we (...)
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  34. Decoupling, Sparsity, Randomization, and Objective Bayesian Inference.Julio Michael Stern - 2008 - Cybernetics and Human Knowing 15 (2):49-68..
    Decoupling is a general principle that allows us to separate simple components in a complex system. In statistics, decoupling is often expressed as independence, no association, or zero covariance relations. These relations are sharp statistical hypotheses, that can be tested using the FBST - Full Bayesian Significance Test. Decoupling relations can also be introduced by some techniques of Design of Statistical Experiments, DSEs, like randomization. This article discusses the concepts of decoupling, randomization and sparsely connected statistical models in the epistemological (...)
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  35. Karl Pearson and the Logic of Science: Renouncing Causal Understanding (the Bride) and Inverted Spinozism.Julio Michael Stern - 2018 - South American Journal of Logic 4 (1):219-252.
    Karl Pearson is the leading figure of XX century statistics. He and his co-workers crafted the core of the theory, methods and language of frequentist or classical statistics – the prevalent inductive logic of contemporary science. However, before working in statistics, K. Pearson had other interests in life, namely, in this order, philosophy, physics, and biological heredity. Key concepts of his philosophical and epistemological system of anti-Spinozism (a form of transcendental idealism) are carried over to his subsequent works on the (...)
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  36. Testing the Independence of Poisson Variates under the Holgate Bivariate Distribution: The Power of a New Evidence Test.Julio Michael Stern & Shelemyahu Zacks - 2002 - Statistics and Probability Letters 60:313-320.
    A new Evidence Test is applied to the problem of testing whether two Poisson random variables are dependent. The dependence structure is that of Holgate’s bivariate distribution. These bivariate distribution depends on three parameters, 0 < theta_1, theta_2 < infty, and 0 < theta_3 < min(theta_1, theta_2). The Evidence Test was originally developed as a Bayesian test, but in the present paper it is compared to the best known test of the hypothesis of independence in a frequentist framework. It is (...)
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  37. Optimization Models for Reaction Networks: Information Divergence, Quadratic Programming and Kirchhoff’s Laws.Julio Michael Stern - 2014 - Axioms 109:109-118.
    This article presents a simple derivation of optimization models for reaction networks leading to a generalized form of the mass-action law, and compares the formal structure of Minimum Information Divergence, Quadratic Programming and Kirchhoff type network models. These optimization models are used in related articles to develop and illustrate the operation of ontology alignment algorithms and to discuss closely connected issues concerning the epistemological and statistical significance of sharp or precise hypotheses in empirical science.
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  38. Can a Significance Test Be Genuinely Bayesian?Julio Michael Stern, Carlos Alberto de Braganca Pereira & Sergio Wechsler - 2008 - Bayesian Analysis 3 (1):79-100.
    The Full Bayesian Significance Test, FBST, is extensively reviewed. Its test statistic, a genuine Bayesian measure of evidence, is discussed in detail. Its behavior in some problems of statistical inference like testing for independence in contingency tables is discussed.
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  39.  90
    How (not) to be a buck-passer about art.Miguel F. Dos Santos - forthcoming - Thought: A Journal of Philosophy.
    According to buck-passers about art, such as Dominic Lopes, every work of art belongs to some art. I distinguish two versions of the buck-passing theory of art—what I call the double-buck-passers’ (DBP) view and the single-buck-passers’ (SBP) view—and point out that Lopes’s view is an instance of the latter. Then I argue the SBP view faces a dilemma, each horn of which leads to trouble. In doing so, I explore uncharted territory: the implications of vagueness for theories of art. I (...)
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  40. Factorization of Sparse Bayesian Networks.Julio Michael Stern & Ernesto Coutinho Colla - 2009 - Studies in Computational Intelligence 199:275-285.
    This paper shows how an efficient and parallel algorithm for inference in Bayesian Networks (BNs) can be built and implemented combining sparse matrix factorization methods with variable elimination algorithms for BNs. This entails a complete separation between a first symbolic phase, and a second numerical phase.
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  41. A Dynamic Software Certification and Verification Procedure.Julio Michael Stern & Carlos Alberto de Braganca Pereira - 1998 - SCI’99 Proceedings 2:426-435.
    in Oct-14-1998 ordinance INDESP-IO4 established the federal software certification and verification requirements for gaming machines in Brazil. The authors present the rationale behind these criteria, whose basic principles can find applications in several other software authentication applications.
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  42. Randomization and Fair Judgment in Law and Science.Julio Michael Stern - 2020 - In Jose Acacio de Barros & Decio Krause (eds.), A True Polymath: A Tribute to Francisco Antonio Doria. College Publications. pp. 399-418.
    Randomization procedures are used in legal and statistical applications, aiming to shield important decisions from spurious influences. This article gives an intuitive introduction to randomization and examines some intended consequences of its use related to truthful statistical inference and fair legal judgment. This article also presents an open-code Java implementation for a cryptographically secure, statistically reliable, transparent, traceable, and fully auditable randomization tool.
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  43. A New Media Optimizer Based on the Mean-Variance Model.Julio Michael Stern - 2007 - Pesquisa Operacional, 27 (3):427-456.
    In the financial markets, there is a well established portfolio optimization model called generalized mean-variance model (or generalized Markowitz model). This model considers that a typical investor, while expecting returns to be high, also expects returns to be as certain as possible. In this paper we introduce a new media optimization system based on the mean-variance model, a novel approach in media planning. After presenting the model in its full generality, we discuss possible advantages of the mean-variance paradigm, such as (...)
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  44. Active set Methods for Problems in Column Block Angular Form.Julio Michael Stern & Stephen A. Vavasis - 1993 - Computational and Applied Mathematics 12 (3):199-226.
    We study active set methods for optimization problems in Block Angular Form (BAF). We begin by reviewing some standard basis factorizations, including Saunders' orthogonal factorization and updates for the simplex method that do not impose any restriction on the pivot sequence and maintain the basis factorization structured in BAF throughout the algorithm. We then suggest orthogonal factorization and updating procedures that allow coarse grain parallelization, pivot updates local to the affected blocks, and independent block reinversion. A simple parallel environment appropriate (...)
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  45. FBST Regularization and Model Selection.Julio Michael Stern & Carlos Alberto de Braganca Pereira - 2001 - In Julio Michael Stern & Carlos Alberto de Braganca Pereira (eds.), Annals of the 7th International Conference on Information Systems Analysis and Synthesis. Orlando FL: pp. 7: 60-65..
    We show how the Full Bayesian Significance Test (FBST) can be used as a model selection criterion. The FBST was presented by Pereira and Stern as a coherent Bayesian significance test. Key Words: Bayesian test; Evidence; Global optimization; Information; Model selection; Numerical integration; Posterior density; Precise hypothesis; Regularization. AMS: 62A15; 62F15; 62H15.
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  46. Real Attribute Learning Algorithm.Julio Michael Stern, Marcelo de Souza Lauretto, Fabio Nakano & Celma de Oliveira Ribeiro - 1998 - ISAS-SCI’98 2:315-321.
    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 (...)
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  47. O Supervalorativismo e a Vagueza de Ordem Superior.Ricardo Santos - 2010 - In Humberto Brito (ed.), Filosofia e Literatura 1. Instituto de Filosofia da Linguagem. pp. 197-217.
    Este artigo apresenta a teoria supervalorativista da vagueza e discute a objecção, que frequentemente lhe é dirigida, segundo a qual essa teoria não consegue dar conta do fenómeno da vagueza de ordem superior.
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  48. The Problem of Separate Hypotheses via Mixtures Models.Julio Michael Stern, Marcelo de Souza Lauretto, Silvio Rodrigues Faria & Carlos Alberto de Braganca Pereira - 2007 - AIP Conference Proceedings 954:268-275.
    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.
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  49. Arte, ciencia y representación: horizontes epistemológicos y problemas de referencialidad en la imagen.Julio Horta - 2018 - In Virginia García (ed.), la vorágine de las imágenes. pp. 71-78.
    El presente trabajo se circunscribe al problema de la representación y la referencialidad de la imagen, mismo que, desde la filosofía de la ciencia ha cobrado nuevos matices en el contexto de la relación entre ciencia y arte. Así pues, en esta revisión se buscará establecer tres líneas de desarrollo: en primera instancia, se planteará el problema de la representación del objeto como un campo de interés común en los ámbitos de conocimiento, tanto en la ciencia como en el arte. (...)
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  50. Special Characterizations of Standard Discrete Models.Julio Michael Stern & Carlos Alberto de Braganca Pereira - 2008 - RevStat – Statistical Journal 6:199-230.
    This article presents important properties of standard discrete distributions and its conjugate densities. The Bernoulli and Poisson processes are described as generators of such discrete models. A characterization of distributions by mixtures is also introduced. This article adopts a novel singular notation and representation. Singular representations are unusual in statistical texts. Nevertheless, the singular notation makes it simpler to extend and generalize theoretical results and greatly facilitates numerical and computational implementation.
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