El argumento de 'Lo Uno sobre lo múltiple' en el Tratado sobre las Ideas de Aristóteles

En este trabajo procuramos ofrecer, en primer lugar, un análisis del argumento de lo uno sobre lo múltiple presente en el tratado Sobre las Ideas de Aristóteles, con el fin de determinar las diferencias entre la Idea platónica y el universal aristotélico. En segundo lugar, nos preguntamos acerca de la validez de la reconstrucción aristotélica de los argumentos platónicos y sostenemos que hay indicios en los diálogos que nos permiten concluir que Aristóteles no traiciona el pensamiento de Platón. Por último, subrayamos que el examen crítico al que somete los argumentos es relevante, no sólo para establecer la distinción entre la Idea platónica y el universal aristotélico, sino también para establecer los aspectos de su propio pensamiento que permanecen deudores de las doctrinas platónicas

El argumento de 'Lo Uno sobre lo múltiple' en el Tratado sobre las Ideas de Aristóteles

En este trabajo procuramos ofrecer, en primer lugar, un análisis del argumento de lo uno sobre lo múltiple presente en el tratado Sobre las Ideas de Aristóteles, con el fin de determinar las diferencias entre la Idea platónica y el universal aristotélico. En segundo lugar, nos preguntamos acerca de la validez de la reconstrucción aristotélica de los argumentos platónicos y sostenemos que hay indicios en los diálogos que nos permiten concluir que Aristóteles no traiciona el pensamiento de Platón. Por último, subrayamos que el examen crítico al que somete los argumentos es relevante, no sólo para establecer la distinción entre la Idea platónica y el universal aristotélico, sino también para establecer los aspectos de su propio pensamiento que permanecen deudores de las doctrinas platónicas

El argumento de 'Lo Uno sobre lo múltiple' en el Tratado sobre las Ideas de Aristóteles

En este trabajo procuramos ofrecer, en primer lugar, un análisis del argumento de lo uno sobre lo múltiple presente en el tratado Sobre las Ideas de Aristóteles, con el fin de determinar las diferencias entre la Idea platónica y el universal aristotélico. En segundo lugar, nos preguntamos acerca de la validez de la reconstrucción aristotélica de los argumentos platónicos y sostenemos que hay indicios en los diálogos que nos permiten concluir que Aristóteles no traiciona el pensamiento de Platón. Por último, subrayamos que el examen crítico al que somete los argumentos es relevante, no sólo para establecer la distinción entre la Idea platónica y el universal aristotélico, sino también para establecer los aspectos de su propio pensamiento que permanecen deudores de las doctrinas platónicas

One protein�many functions

The concept of one enzyme-one activity had influenced biochemistry for over half a century. Over 1000 enzymes are now described. Many of them are highly 'specific'. Some of them are crystallized and their three-dimensional structures determined. They range from 12 to 1000 kDa in molecular weight and possess 124 to several hundreds of amino acids. They occur as single polypeptides or multiple-subunit proteins. The active sites are assembled on these by appropriate tertiary folding of the polypeptide chain, or by interaction of the constituent subunits. The substrate is held by the side-chains of a few amino acids at the active site on the surface, occupying a tiny fraction of the total area. What is the bulk of the protein behind the active site doing? Do all proteins have only one function each? Why not a protein have more than one active site on its large surface? Will we discover more than one activity for some proteins? These newer possibilities are emerging and are finding experimental support. Some proteins purified to homogeneity using assay methods for different activities are now recognized to have the same molecular weight and a high degree of homology of amino acid sequence. Obviously they are identical. They represent the phenomenon of one protein-many functions.

One Person, Many Votes: Divided Majority and Information Aggregation

In elections, majority divisions pave the way to focal manipulations and coordination failures, which can lead to the victory of the wrong candidate. This paper shows how this flaw can be addressed if voter preferences over candidates are sensitive to information. We consider two potential sources of divisions: majority voters may have similar preferences but opposite information about the candidates, or opposite preferences. We show that when information is the source of majority divisions, Approval Voting features a unique equilibrium with full information and coordination equivalence. That is, it produces the same outcome as if both information and coordination problems could be resolved. Other electoral systems, such as Plurality and Two-Round elections, do not satisfy this equivalence. The second source of division is opposite preferences. Whenever the fraction of voters with such preferences is not too large, Approval Voting still satisfies full information and coordination equivalence.

Structural changes in quasi-one-dimensional many-electron systems: From linear to zigzag and beyond

Many-electron systems confined to a quasi-one-dimensional geometry by a cylindrical distribution of positive charge have been investigated by density functional computations in the unrestricted local spin density approximation. Our investigations have been focused on the low-density regime, in which electrons are localized. The results reveal a wide variety of different charge and spin configurations, including linear and zig-zag chains, single-and double-strand helices, and twisted chains of dimers. The spin-spin coupling turns from weakly antiferromagnetic at relatively high density, to weakly ferromagnetic at the lowest densities considered in our computations. The stability of linear chains of localized charge has been investigated by analyzing the radial dependence of the self-consistent potential and by computing the dispersion relation of low-energy harmonic excitations.

One religion: many creeds.

Mode of access: Internet.

The cruise of Her Majesty's ship "Challenger." Voyages over many seas, scenes in many lands.

Mode of access: Internet.

One of many homeless women in New York

General note: Title and date provided by Bettye Lane.

One of many bag women who beg for money in mid-town

General note: Title and date provided by Bettye Lane.

Woman begs in front of one of many benevolent associations

General note: Title and date provided by Bettye Lane.