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A critica behaviorista de W. O. Quine
Arruda, Antonio Trajano Menezes;
Trans/Form/A??o , 1980, DOI: 10.1590/S0101-31731980000100007
Abstract: the object of this paper is quine's behavioristic critique of semantics and epistemology. quine claims to have produced with this critique important contributions to the clarification of a number a notions, among them the notion of observation, or of observation sentence, a topic which is discussed here in detail. it is also discussed the precise role of the so-called duhem-quine thesis in quine's rejection of the doctrine of propositions.
Quine’s Indeterminacy of Translation Thesis  [cached]
Xiang Xu
Journal of Language Teaching and Research , 2010, DOI: 10.4304/jltr.1.3.274-277
Abstract: This paper aims to analyze Quine’s major theories of Indeterminacy of Meaning and Inscrutability of Reference by their definition and appearance, then comments them in daily communication and practical translation activities.
O modus tollens, o holismo de Duhem-Quine e as ciências sociais
Freitas, Renan Springer de;Collares, Ana Cristina Murta;
Dados , 2001, DOI: 10.1590/S0011-52582001000200006
Abstract: the idea that scientific interference consists of the exercise of directing the modus tollens to given statements currently enjoys canonical status in the social sciences. this idea requires that statements about the world have a supply of empirical consequences that can be isolated and referred to as proper to them. however, according to duhem-quine?s holistic vision of knowledge, such a demand cannot be met. this article discusses the implications, for the social sciences, of the holistic critique towards the canonical model of scientific interference, given that two pillars of this area of knowledge, i.e., suicide, by émile durkheim, and the protestant ethic and the spirit of capitalism, by max weber, are tributaries of said canonical model.
O modus tollens, o holismo de Duhem-Quine e as ciências sociais  [cached]
Freitas Renan Springer de,Collares Ana Cristina Murta
Dados , 2001,
Abstract: The idea that scientific interference consists of the exercise of directing the modus tollens to given statements currently enjoys canonical status in the social sciences. This idea requires that statements about the world have a supply of empirical consequences that can be isolated and referred to as proper to them. However, according to Duhem-Quine?s holistic vision of knowledge, such a demand cannot be met. This article discusses the implications, for the social sciences, of the holistic critique towards the canonical model of scientific interference, given that two pillars of this area of knowledge, i.e., Suicide, by émile Durkheim, and The Protestant Ethic and the Spirit of Capitalism, by Max Weber, are tributaries of said canonical model.
Dark Matter; Modification of f(R) or Wimps Miracle  [PDF]
A. ?vgün
Physics , 2013,
Abstract: The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I review some candidates of dark matter, especially WIMPs (weakly interacting massive particles) which is one of the best candidate so it is called that WIMPs miracle. In addition of this, there are also some theories of modification of gravity, by changing the law of gravity, it could be possible that the dark matter observations are explained. Until the dark matter particle is detected, there is some room for uncertainty. So we should consider every part of the problem and solve it. Dark matter problem is covering a large area so every possibility is important. So f(R) gravity is also reviewed in this thesis and some theories are considered as a possible solution of dark matter problem. Finally we highlight that, even in the case of WIMPs or another particles solution, f(R) gravity is also can be used for this problem. However, last words will be said by experiments.
Dark Matter  [PDF]
Jaan Einasto
Physics , 2013, DOI: 10.1007/s13538-013-0147-9
Abstract: I give a review of the development of the concept of dark matter. The dark matter story passed through several stages from a minor observational puzzle to a major challenge for theory of elementary particles. Modern data suggest that dark matter is the dominant matter component in the Universe, and that it consists of some unknown non-baryonic particles. Dark matter is the dominant matter component in the Universe, thus properties of dark matter particles determine the structure of the cosmic web.
Dark Matter  [PDF]
Neta Bahcall
Physics , 1996,
Abstract: Observations in the optical, in X-rays, and gravitational lensing of galaxies, clusters of galaxies, and large-scale structure are beginning to provide clues to the dark matter problem. I review the impact of these observations on some of the main questions relating to dark matter: How much dark matter is there? Where is it located? What is the nature of the dark matter? and what is the amount of baryonic dark matter.
The distribution of the dark matter in galaxies as the imprint of its Nature  [PDF]
Christiane Frigerio Martins
Physics , 2009,
Abstract: The standard framework within which cosmological measurements are confronted and interpreted nowadays, called Lambda Cold Dark Matter, presents a Universe dominated by unknown forms of energy and matter. My Thesis is devoted to investigate the distribution of dark matter in galaxies and addresses the fact that the local universe-the small objects that orbit galaxies and the galaxy cores-turns out to be a marvelous laboratory for examining the nature of dark matter and the fundamental physics involved in structure formation and evolution. I develop tests, based on mass modeling of rotation curves, for the validation of dark matter models on galactic scales. These tests have been applied in analyzing the phenomenology of the cusp vs core controversy, and the phenomenon of non-Keplerian rotation curves as modification of the laws of gravity. I further investigate the properties and scaling laws of dark matter halos. My conclusion is that galactic observations provide strong imprints on the nature of dark matter.
Dark matter  [PDF]
J. Einasto
Physics , 2011,
Abstract: I give a review of the development of the concept of dark matter. The dark matter story passed through several stages from a minor observational puzzle to a major challenge for theory of elementary particles. Modern data suggest that dark matter is the dominant matter component in the Universe, and that it consists of some unknown non-baryonic particles. Properties of dark matter particles determine the structure of the cosmic web.
Dark Energy and Dark Matter  [PDF]
D. Comelli,M. Pietroni,A. Riotto
Physics , 2003, DOI: 10.1016/j.physletb.2003.05.006
Abstract: It is a puzzle why the densities of dark matter and dark energy are nearly equal today when they scale so differently during the expansion of the universe. This conundrum may be solved if there is a coupling between the two dark sectors. In this paper we assume that dark matter is made of cold relics with masses depending exponentially on the scalar field associated to dark energy. Since the dynamics of the system is dominated by an attractor solution, the dark matter particle mass is forced to change with time as to ensure that the ratio between the energy densities of dark matter and dark energy become a constant at late times and one readily realizes that the present-day dark matter abundance is not very sensitive to its value when dark matter particles decouple from the thermal bath. We show that the dependence of the present abundance of cold dark matter on the parameters of the model differs drastically from the familiar results where no connection between dark energy and dark matter is present. In particular, we analyze the case in which the cold dark matter particle is the lightest supersymmetric particle.
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