Search results for "theory [cosmology]"
showing 10 items of 973 documents
Los principios generales del derecho en la interpretación. (Una aproximación desde J. Bms. Vallet de Goytisolo)
2011
RESUMENEl artículo comienza haciendo mención al papel de la interpretación en el campo del Derecho así como su alcance en esta área. A continuación, se analiza el concepto de principio general del Derecho. Una vez centradas estas cuestiones, el artículo continúa con una panorámica general de la visión de Vallet de Goytisolo en el tema que se plantea, haciendo una pequeña referencia a la particularidad de la aplicación de la analogía iuris en la proyección de los principios generales del Derecho. La exposición finaliza con unas notas a modo de conclusiones ABSTRACT The article begins by explaining the role and scope of interpretation in Law. Next, it explores the concept of General Principle…
Vilpittömiä valeuutisia: tutkielma poliittisen satiirin sisältämän huumorin ja yhteiskuntakritiikin suhteesta
2016
Tämä tutkielma pyrkii tarkentamaan poliittisen satiirin määritelmää suhteessa aiempaan satiirin ja huumorin tutkimukseen. Työssä on myös tavoitteena pyrkiä yhteiskuntatieteelliseen näkökulmaan vastaamalla muodostetun määritelmän avulla kysymykseen poliittisessa satiirissa esiintyvän huumorin ja yhteiskuntakritiikin suhteen laadusta. Ensimmäisessa luvussa esitellään muutama tutkielman aiheen ja tulokulman kannalta oleelliseksi katsottu huumorintutkimuksen nykysuuntaus: yhteensopimattomuus- sekä antagonistinen teoria. Nämä teoriaperheet esitellään niitä kannattavien nykyteoreetikkojen muotoilujen kautta, sillä niiden katsotaan olevan nykyaikaisen huumorimuodon tutkimisen kannalta laajaa histo…
Classical and relativistic n-body problem: from Levi-Civita to the most advanced interplanetary missions
2022
The n-body problem is one of the most important issue in Celestial Mechanics. This article aims to retrace the historical and scientific events that led the Paduan mathematician, Tullio Levi-Civita, to deal with the problem first from a classic and then a relativistic point of view. We describe Levi-Civita's contributions to the theory of relativity focusing on his epistolary exchanges with Einstein, on the problem of secular acceleration and on the proof of Brillouin's cancellation principle. We also point out that the themes treated by Levi-Civita are very topical. Specifically, we analyse how the mathematical formalism used nowadays to test General Relativity can be found in Levi-Civita'…
(K)over-bar* mesons in dense matter
2010
We study the properties of (K) over bar* mesons in nuclear matter using a unitary approach in coupled channels within the framework of the local hidden gauge formalism and incorporating the (K) over bar pi decay channel in matter. The in-medium (K) over bar *N interaction accounts for Pauli blocking effects and incorporates the (K) over bar* self-energy in a self-consistent manner. We also obtain the (K) over bar* (off-shell) spectral function and analyze its behavior at finite density and momentum. At a normal nuclear matter density, the (K) over bar* meson feels a moderately attractive potential, while the (K) over bar* width becomes five times larger than in free space. We estimate the t…
Non-Local Scattering Kernel and the Hydrodynamic Limit
2007
In this paper we study the interaction of a fluid with a wall in the framework of the kinetic theory. We consider the possibility that the fluid molecules can penetrate the wall to be reflected by the inner layers of the wall. This results in a scattering kernel which is a non-local generalization of the classical Maxwell scattering kernel. The proposed scattering kernel satisfies a global mass conservation law and a generalized reciprocity relation. We study the hydrodynamic limit performing a Knudsen layer analysis, and derive a new class of (weakly) nonlocal boundary conditions to be imposed to the Navier-Stokes equations.
Accelerated Evolution of Fetuin-A (FETUA, also AHSG) is Driven by Positive Darwinian Selection, not GC-Biased Gene Conversion
2009
article i nfo Human Fetuin-A (FETUA, also termed AHSG) is a serum protein composed of two cystatin-like domains D1 and D2 of together 235 amino acids (aa) and an unrelated domain D3 of 114 aa. Though the protein plays a role in diverse physiological and pathological processes, comparably little is known about sequence evolution of FETUA. We therefore analyzed its molecular evolution on the basis of coding sequences of 16 primate species. Ratios of non-synonymous to synonymous substitution rates (dn/ds= ω) suggest that a previously reported acceleration of sequence evolution of exon 7, which encodes domain D3, is driven by positive selection instead of neutral evolution. Irrespective of the …
Cell cycle: Aetiology of age-associated aneuploidy: a mechanism based on the 'free radical theory of ageing'
1995
A general model is put forward to explain the mechanism by which age-associated aneuploidies are produced. This is based on the free radical theory of ageing, which assumes a rise in oxidative stress with age. It is proposed that determination of indicators of oxidative stress in oocytes from various sources could be a first step in the testing of this hypothesis.
A propósito de la inalterabilidad e intangibilidad del patrimonio genético humano como bien digno de protección penal
2019
En el presente estudio se efectúa una reflexión sobre el delito de manipulación genética contemplado en el artículo 159 del Código penal, precepto cuya concreta regulación despierta numerosas objeciones, especialmente en atención al bien jurídico de carácter colectivo que protege, como es la identidad genética, cuestionándose si esta conducta en particular encontraría mejor acomodo en la legislación administrativa. This paper makes a reflection on the crime of genetic manipulation contemplated in Article 159 of the Criminal Code, a provision whose specific regulation raises many objections, especially in attention to the collective legal right that protects, such as genetic identity, questi…
Max von laue’s role in the relativity revolution
2008
Whereas countless studies have been devoted to Einstein’s work on relativity, the contributions of several other major protagonists have received comparatively little attention. Within the immediate German context, no single figure played a more important role in developing the consequences of the special theory of relativity (SR) than Max von Laue (1879–1960). Although remembered today mainly for his discovery of x-ray diffraction in 1912 – an achievement for which he was awarded the Nobel Prize – Laue’s accomplishments in promoting the theory of relativity were of crucial importance. They began early, well before most physicists even knew anything about a mysterious Swiss theoretician nam…
The Free Radical Theory of Aging Revisited: The Cell Signaling Disruption Theory of Aging
2013
AbstractSignificance: The free radical theory of aging has provided a theoretical framework for an enormous amount of work leading to significant advances in our understanding of aging. Up to the turn of the century, the theory received abundant support from observations coming from fields as far apart as comparative physiology or molecular biology. Recent Advances: Work from many laboratories supports the theory, for instance showing that overexpression of antioxidant enzymes results in increases in life-span. But other labs have shown that in some cases, there is an increased oxidative stress and increased longevity. The discovery that free radicals can not only cause molecular damage to …