Hemeroteca del mes diciembre, 2020

Why Turkey is upgrading its ties with Israel

Por • 31 dic, 2020 • Category: Internacionales

MK Bhadrakumar December 29,2020. The upgrade of Turkey-Israel diplomatic ties to an ambassadorial level has not come as a surprise, and it is by no means an extension of the Abraham Accords. In essence, Turkey is posting a new envoy to Tel Aviv after a gap of two years. The downgrading of ties was a mark of […]



Venezuela: las patologías de una sociedad rentista

Por • 31 dic, 2020 • Category: sociologia

Con diversos grados de intensidad, el país ha estado sometida al modelo de acumulación extractivísta: primero como colonia de España, luego en su relación de dependencia con las potencias industrializadas como EE.UU. o países europeos, y ahora crecientemente con China, la gran manufactura mundial que requiere un suministro seguro con materias primas y energía. La descripción de estos conceptos aplicados, como de extractivismo, de capitalismo rentístico y de neo-rentismo socialista nos ayudarán a comprender cómo se fue gestando una tragedia para uno de los países de América Latina más ricos en recursos naturales, pero cuya población está sumida en la pobreza.



Awareness Logic: A Kripke-based Rendition of the Heifetz-Meier-Schipper Model

Por • 31 dic, 2020 • Category: Economía

Heifetz, Meier and Schipper (HMS) present a lattice model of awareness. The HMS model is syntax-free, which precludes the simple option to rely on formal language to induce lattices, and represents uncertainty and unawareness with one entangled construct, making it difficult to assess the properties of either. Here, we present a model based on a lattice of Kripke models, induced by atom subset inclusion, in which uncertainty and unawareness are separate.



Bealer’s Intensional Logic

Por • 31 dic, 2020 • Category: Ambiente

Many intuitively valid arguments involving intensionality cannot be captured by first-order logic, even when extended by modal and epistemic operators. Indeed, previous attempts at providing an adequate treatment of the phenomenon of intensionality in logic and language, such as those of Frege, Church, Russell, Carnap, Quine, Montague and others are fraught with numerous philosophical and technical difficulties and shortcomings. We present Bealer’s solution to this problem which hinges on an ontological commitment to theory of Properties, Propositions and Relations (PRP). At the most basic level we can distinguish two conceptions in the theory of PRPs. An objective one tied to modality and necessary equivalence, and a mental (intentional) one tied to concepts and the requirement of non-circularity in definitions.



From the two notions of paradigm and reduction between theories to a new multilinear History of physics

Por • 31 dic, 2020 • Category: Filosofía

A new mathematics, the constructive one, characterizes a singular limit as undecidable. Hence, a singular limit between two theories actually represents a difference between two different kinds of mathematics. This particular situation suggests a mathematical definition of the notion of incommensurability. As a consequence of the resulting incommensurabilities among many couples of theories the foundations of physical theories are pluralist, not only in both epistemological and ontological senses, but also in mathematical sense. Hence since longtime the history of physics is developing along a plurilinear path.



Physical deep learning based on optimal control of dynamical systems

Por • 31 dic, 2020 • Category: Ciencia y tecnología

A central topic in recent artificial intelligence technologies is deep learning, which can be regarded as a multilayer feedforward neural network. An essence of deep learning is the information propagation through the layers, suggesting a connection between deep neural networks and dynamical systems, in the sense that the information propagation is explicitly modeled by the time-evolution of dynamical systems. Here, we present a pattern recognition based on optimal control of continuous-time dynamical systems, which is suitable for physical hardware implementation. The learning is based on the adjoint method to optimally control dynamical systems, and the deep (virtual) network structures based on the time evolution of the systems can be used for processing input information.



How to define your dimension: A discourse on Hausdorff dimension and self-similarity

Por • 31 dic, 2020 • Category: Crítica

One often distinguishes between a line and a plane by saying that the former is one-dimensional while the latter is two. But, what does it mean for an object to have d−dimensions? Can we define a consistent notion of dimension rigorously for arbitrary objects, say a snowflake, perhaps? And must the dimension always be integer-valued?



Venezuela y Turquía estrechan al nivel más alto cooperación a 70 años de relaciones diplomáticas

Por • 31 dic, 2020 • Category: Nacionales

AVN 29/12/2020. Caracas.- Las relaciones diplomáticas entre Venezuela y Turquía a sus 70 años han «alcanzado el nivel más elevado e integral de nuestra alianza de cooperación, estrechando lazos de hermandad, aportando para un mundo más justo y solidario», significó el canciller de la República, Jorge Arreaza. En el Twitter, el ministro para Relaciones Exteriores ratificó […]



Economía del bloqueo: ¿dónde está la salida?

Por • 31 dic, 2020 • Category: Nacionales

Sputniknews Mauricio Montes 30.12.2020. Bloqueo, palabra que surgió como otra manera de decir asedio. Del francés ‘bloc’, o del inglés ‘block’, tiene su origen en el neerlandés ‘blok’, que significa tronco cortado, tropiezo. Mariano Arnal, investigador del origen de las palabras, dice que el verbo bloquear aparece en español en el siglo XVIII, en la terminología militar. […]



«Ensayo sobre la lucidez»

Por • 31 dic, 2020 • Category: Nacionales

Oly Millán Campos 29/12/2020 Es el título de una famosa novela del escritor de origen portugués José Saramago. La novela se desarrolla en torno al comportamiento masivo que tuvo la población de una ciudad, de un país sin nombre, cuando ante un proceso electoral que se estaba desarrollando, la gente de forma individual decidió votar diferente. Votar […]