Electrical resistivity and ac-calorimetric measurements reveal a complex magnetic phase diagram for single crystals of the ferromagnetic Kondo-lattice compound CeAgSb2 at high pressures up to 80 kbar. The ferromagnetic order at TC = 9.6 K at ambient pressure is completely suppressed at a critical pressure PC = 35 kbar. Another magnetic transition, possibly antiferromagnetic, found above 27 kbar, attains a maximum value TN 6 K at 44 kbar and then appears to be completely suppressed by 50 kbar. Thermodynamic and transport (...) measurements in the ferromagnetic state indicate an energy gap Δ 30 K in the spin-wave excitation spectrum at ambient pressure which decreases to Δ 10 K at P = 30 kbar. No superconductivity is observed at ambient pressure above T 0.1 K, under applied pressure in the ferromagnetic state (P = 28.5 kbar), nor in the antiferromagnetic state (P = 33 − 46 kbar) above 0.3 K. © 2003 The American Physical Society. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:FINALITY AND INTELLIGIBILITY IN BIOLOGICAL EVOLUTION ANTONIO MORENO, O.P. Graduate Theological Union Berkeley, California I N SCIENCE AND philosophy the final cause has always..,been controversial. To biologists the problem is complicated, but many believe that it is impossible fo give a complete description of the phenomenon of life without taking into oonsideration the teleological aspect of it. Thus Rensch: A special feature of all living organisms is the (...) fact that biological processes in general appear to be: 'meaningful.' They are not only appropriate to the immediate conditions, but also seem to be directed to some purpose which in individual development is only achievE:d at a relatively late stage and after many modications of form.1 Simpson's approach to this problem is shaped by the conviction that biology should attempt to answer all the questions, one of whioh is the reason for a living being's activity: "Here, ' What for '-the dreadful teleological question-not only is legitimate but also must eventually be asked about every vital phenomenon." 2 To understand how finality is realized in biology, let us first turn briefly to the nature of the final cause. The Nature of the Final CaU8e Aristotle deals with causes in the seeond book of his Physics: It is through the causes that scientific conclusions about mobile heings are demonstrated. Movement is intelligible when we discover the causes that produce it. Among the 1B. Rensch, Biophilosophy (New York: Columbia University Press, 1971), p. 107. 2 G. Simpson, Th,is Vi.ew of Life (New York: Ifarcourt, 1964),.pp. 104-108. l ANTONIO MORENO, O.P. causes, the first and most important is the final cause, which is defined as "that for the sake of which a thing is done." 3 The final cause is the motive or reason which impels the agent to operate. Motion is the vehicle by whioh the goal is attained and, consequently, the other causes exercise their causality in dependence on the final cause. Hence, Aquinas says: " The final cause is called the cause of causes, because it is the cause of the causality of all the causes. For it is the cause of the efficient ca:usality; and the efficient cause is the cause of the causality of both the matter and the form.".j, The final cause directs, inclines, and attracts; impelled by this attraction, the efficient pushes and exercises its action. Aquinas asserts that those who reject the final cause destroy the intelligibility of science, inasmuch as they suppress the motive or first reason which justifies motion. The final cause is not the cause that executes the adion, for this is the agent's function, the efficient cause. The final cause is the reason why the agent acts. Therefore, the efficient cause presupposes the final: "The end is not the cause unless it moves the agent to act. If there is no action the final cause does not exist." 5 It is interesting to note that many biologists believe that the existence of finality destroys causality, when actually the opposite is true. For example, Simpson says: " The finalist was often the man who made a liberal use of ignaV'a ratio,... when you failed to explain a, thing by the ordinary process of causality, you could ' explain ' it 1by reference to some purpose of nature." 6 A simple desirn or attraction is not a cause unless it is fol3 Aristotle, Ph&sias (Trans. W. D. Ross) Book II, 3, 194b34. (Oxford, 1962). 4 Thomas Aquinas, In V Metaph., Iect. 3, n. 782. Of. Summa Theol., I, q. 105, a.5. 5 Thomas Aquinas, On the Power of God, trans. English Dominican Fathers (Westminster, Md.: Newman Press, 1952), q.5, a. l. 6 G. Simpson, The Meaning of Evolution (New Haven: Yale University Press, 1967), p. 274. FINALITY IN BIOLOGICAL EVOLUTION 3 lowed by the activity of the agent. The desire to attain the goal is called the " intention " of the action, even when the goal is not achieved, as happens in many of our actions. Failure does not destroy finality; inactivity does. For that which is first in the intention is the last to be achieved as the effect. The intention does not... (shrink)

El Contextualismo ofrece una novedosa forma de acercamiento a la obra arquitectónica, dado que la pone en relación íntima con el "habitar" humano. Ello le exige al intérprete poner de presente no sólo la contingencia e historicidad de la obra, sino también las relaciones que ésta establece con el entorno. Para mostrar la peculiaridad de esta propuesta -que se vale de tipologías visuales y táctiles-, la autora la compara, en primer lugar, con aquellos métodos que se valen solamente de parámetros (...) formales o preestablecidos. En segundo lugar, reconoce como punto de partida de su trabajo el aporte de Henri Bergson, quien al ser un exponente del pensamiento contextual, ofrece, no sólo un análisis de la imagen como elemento que posibilita nuevas aperturas y modificaciones de sentido, sino además, múltiples caminos para la interpretación. Por último, la autora analiza dos obras del arquitecto Osear Niemeyer, en las cuales se percibe de manera más concreta el sentido de esta propuesta. (shrink)

En el presente trabajo hablaremos del desarrollo filosófico que Hegel hace de la ópera en su Estética. Para ello, haremos una breve explicación sobre las características de las dos versiones que hoy tenemos de esta obra hegeliana; esto tanto en su origen histórico como en las implicaciones teóricas de cada uno de estos textos. Posteriormente, localizaremos la ópera en cada una de las versiones de la Estética, para poder así exponer las particularidades y diferencias teóricas entre ambos materiales bibliográficos. Cabe (...) mencionar que profundizaremos en la ópera pensada como Gesamtkunstwerk, noción encontrada en la versión más reciente de los cursos de estética de Hegel, puesto que consideramos, además de su novedad, que es una noción del espíritu que nos conduce a nuevas precisiones en el estudio del pensamiento del filósofo de Stuttgart. (shrink)

Introducción a la problemática jurídica actual, por R. M. Alsina.--La filosofía de la cultura, por Francisco Romero.--El sentido del derecho para la vida humana, por Juan Llambías de Azevedo.--El derecho como objeto y la ciencia del derecho, por E. R. Aftalión.--Las especies del saber jurídico (consideraciones de epistemología) por Manuel Río.--Posición cultural de las orientaciones políticas, por M. T. Ruiz Moreno.

Uslovii︠a︡ absoli︠u︡tnogo dobra -- Kharakter russkogo naroda.

Materii︠a︡ v sisteme organicheskogo mirovozzrenii︠a︡.--Sovremennyĭ vitalizm. Dokazatelʹstva nesostoi︠a︡telʹnosti biomekhanizma. Svoĭstva i sposoby deĭstvii︠a︡ faktora zhizni.