Artículos con la etiqueta ‘investigación’

Operational Dynamic Modeling Transcending Quantum and Classical Mechanics

Por • 11 feb, 2013 • Category: Ciencia y tecnología

We introduce a general and systematic theoretical framework for Operational Dynamic Modeling (ODM) by combining a kinematic description of a model with the evolution of the dynamical average values. The kinematics includes the algebra of the observables and their defined averages. The evolution of the average values is drawn in the form of Ehrenfest-like theorems. We show that ODM is capable of encompassing wide ranging dynamics from classical non-relativistic mechanics to quantum field theory. The generality of ODM should provide a basis for formulating novel theories.

An information-processing approach to the origin of life

Por • 20 dic, 2012 • Category: Ambiente

“To a physicist or chemist life seems like ‘magic matter,’” Davies explained. “It behaves in extraordinary ways that are unmatched in any other complex physical or chemical system. Such lifelike properties include autonomy, adaptability and goal-oriented behavior — the ability to harness chemical reactions to enact a pre-programmed agenda, rather than being a slave to those reactions. “We believe the transition in the informational architecture of chemical networks is akin to a phase transition in physics, and we place special emphasis on the top-down information flow in which the system as a whole gains causal purchase over its components, This approach will reveal how the logical organization of biological replicators differs crucially from trivial replication associated with crystals (non-life). By addressing the causal role of information directly, many of the baffling qualities of life are explained.”

Human brain, Internet, and cosmology: similar laws at work?

Por • 30 nov, 2012 • Category: Leyes

Having the ability to predict — let alone trying to control — the dynamics of complex networks remains a central challenge throughout network science. Structural and dynamical similarities among different real networks suggest that some universal laws might be in action, although the nature and common origin of such laws remain elusive. “These findings have key implications for both network science and cosmology,” noted Krioukov. “We discovered that the large-scale growth dynamics of complex networks and causal networks are asymptotically (at large times) the same, explaining the structural similarity between these networks.” “The most frequent question that people may ask is whether the discovered asymptotic equivalence between complex networks and the universe could be a coincidence,” said Krioukov. “Of course it could be, but the probability of such a coincidence is extremely low. Coincidences in physics are extremely rare, and almost never happen. There is always an explanation, which may be not immediately obvious.”

Autoconsumación del escepticismo y proposición especulativa. El alcance metodológico de dos conceptos claves de la “Fenomenología del Espíritu”

Por • 14 nov, 2012 • Category: Filosofía

Pese a que la doctrina de la proposición especulativa y la propia Fenomenología del Espíritu considerada como un ejercicio escéptico propedéutico fueron elementos de los cuales Hegel prescindió en la presentación y exposición del método (Ciencia de la Lógica= CL), existen núcleos teóricos de carácter general que permanecen en su convicción de cómo ha de exponerse la verdad filosófica. Para tal efecto se exploran ambos conceptos en su conexión con el método filosófico y la crítica al pensar representativo-aseverador. Finalmente se busca corroborar su proyección acudiendo al preámbulo del inicio en CL.

Accelerating Scientific Discovery by Formulating Grand Scientific Challenges

Por • 13 nov, 2012 • Category: Ambiente

One important question for science and society is how to best promote scientific progress. Inspired by the great success of Hilbert’s famous set of problems, the FuturICT project tries to stimulate and focus the efforts of many scientists by formulating Grand Challenges, i.e. a set of fundamental, relevant and hardly solvable scientific questions.

Between the Individual, the Relative and the Void: Thinking the ‘Event’ in Badiou, Deleuze and Whitehead

Por • 3 nov, 2012 • Category: Filosofía

A few readers have pointed out the remarkable convergence, overlaps and tensions between the thought of Badiou and Deleuze and between Deleuze and Whitehead. In the former case Badiou himself points out these overlaps and tensions and, in the latter, Deleuze points out the convergences and overlaps. Rarely, if at all, have all three together been studied. Yet, one central concept around which their thought coalesces is the‘event’. This is perhaps not surprising since the event is an important concept in 20th century philosophy (in both analytic and continental traditions) as well as numerous other disciplines in the humanities and the sciences.

Teoría económica del capitalismo rentístico

Por • 15 oct, 2012 • Category: Economía

En su nivel programático, el capitalismo rentístico, en cuanto categoría analítica, describe una estructura económica sustentada en la relación del mercado mundial con una propiedad nacional sobre un recurso no producido. Dicha propiedad la ejercita el Estado terrateniente. Este ángulo así perfilado abre el estudio de los limites de la acción del Estado solo como agente económico en el mercado mundial, sino también y especialmente en la propia economía nacional, a la que cabe verla sujeta a una particular racionalidad histórica asociada con el ejercicio de la soberanía política. Estos dos planos convierten al Estado propio del capitalismo rentístico, por una parte, en un agente económico “privado” en el ámbito del mercado mundial y, por la otra, en el agente de suyo “político” dentro de la estructura nacional. Este ultimo orden de ideas pone al descubierto las necesarias determinaciones históricas que el Estado aquí enfrenta, pero de igual manera hace sobresalir una particular anomalía suya vista desde la practica capitalista, a saber, la de ser autónomo en lo económico, con respecto al cuerpo social, para el cumplimiento de sus funciones naturales.

La distribución de los ingresos

Por • 15 oct, 2012 • Category: Nacionales

El coeficiente de Gini, que mide la repartición de la riqueza, se mantuvo estable hasta los primeros años del siglo XXI. Luego experimentó una caída, evidenciando así mayor equidad

The European debt crisis: Defaults and market equilibrium

Por • 12 oct, 2012 • Category: Economía

During the last two years, Europe has been facing a debt crisis, and Greece has been at its center. In response to the crisis, drastic actions have been taken, including the halving of Greek debt. Policy makers acted because interest rates for sovereign debt increased dramatically. High interest rates imply that default is likely due to economic conditions. High interest rates also increase the cost of borrowing and thus cause default to be likely. If there is a departure from equilibrium, increasing interest rates may contribute to—rather than be caused by—default risk. Here we build a quantitative equilibrium model of sovereign default risk that, for the first time, is able to determine if markets are consistently set by economic conditions. We show that over the period 2001-2012, the annually-averaged long-term interest rates of Greek debt are quantitatively related to the ratio of debt to GDP. The relationship shows that the market consistently expects default to occur if the Greek debt reaches twice the GDP.

Axiomatic Method and Category Theory

Por • 5 oct, 2012 • Category: Filosofía

Lawvere’s axiomatization of topos theory and Voevodsky’s axiomatization of heigher homotopy theory exemplify a new way of axiomatic theory building, which goes beyond the classical Hibert-style Axiomatic Method. The new notion of Axiomatic Method that emerges in Categorical logic opens new possibilities for using this method in physics and other natural sciences.