El siglo XX fue una centuria de grandes descubrimientos científicos y desarrollos tecnológicos en todas las áreas, pero en particular en lo relativo a la conquista del espacio. Durante años, la bioética fue pensada en estrecha relación con la ética médica y el ámbito de problemas específicamente humanos, pero en los últimos tiempos su sentido se ha ido ampliando. El presente trabajo busca relacionar esta preocupación por una ciencia de la supervivencia con la existencia de la llamada basura espacial o (...) chatarra espacial que orbita la Tierra, y que en un tiempo no conocido afectará pequeñas o grandes áreas de nuestro planeta. La basura espacial se ha convertido en una preocupación cada vez mayor, especialmente en los últimos años, puesto que las colisiones a velocidades orbitales pueden producir aún más basura espacial en el proceso llamado síndrome de Kessler, o cascada de ablación, lo que perjudicaría el funcionamiento de los satélites, afectaría las misiones espaciales o pondría en riesgo la vida de los astronautas. También es probable que dicha basura se precipite sobre la Tierra, con efectos no claramente evaluados sobre la población humana. Aunque el problema suele aparecer tanto en textos científicos como en obras de ciencia-ficción, no ha sido considerado con la seriedad exigida para un riesgo real y no alejado de la vida cotidiana. (shrink)

We present a mathematical approach to defeasible reasoning based on arguments. This approach integrates the notion of specificity introduced by Poole and the theory of warrant presented by Pollock. The main contribution of this paper is a precise, well-defined system which exhibits correct behavior when applied to the benchmark examples in the literature. It aims for usability rather than novelty. We prove that an order relation can be introduced among equivalence classes of arguments under the equi-specificity relation. We also prove (...) a theorem that ensures the termination of the process of finding the justified facts. Two more lemmas define a reduced search space for checking specificity. In order to implement the theoretical ideas, the language is restricted to Horn clauses for the evidential context. The language used to represent defeasible rules has been restricted in a similar way. The authors intend this work to unify the various existing approaches to argument-based defeasible reasoning. (shrink)

All organisms possess mechanisms to repair double strand breaks (dsbs) generated in their DNA by damaging agents. Site‐specific dsbs are also introduced during V(D)J recombination. Four complementation groups of radiosensitive rodent mutants are defective in the repair of dsbs, and are unable to carry out V(D)J recombination effectively. The immune defect in Severe Combined Immunodeficient (scid) mice also results from an inability to undergo effective V(D)J recombination, and scid cell lines display a repair defect and belong to one of these (...) complementation groups. These findings indicate a mechanistic overlap between the processes of DNA repair and V(D)J recombination. Recently, two of the genes defined by these complementation groups have been identified and shown to encode components of DNA‐dependent protein kinase (DNA‐PK). We review here the three fields which have become linked by these findings, and discuss the involvement of DNA‐PK in dsb rejoining and in V(D)J recombination. (shrink)

This book examines the life and work of mathematician Giovanni Battista Guccia, founder of the Circolo Matematico di Palermo and its renowned journal, the Rendiconti del Circolo matematico di Palermo. The authors describe how Guccia, an Italian geometer, was able to establish a mathematical society in Sicily in the late nineteenth century, which by 1914 would grow to become the largest and most international in the world, with one of the most influential journals of the time. The book highlights the (...) challenges faced by Guccia in creating an international society in isolated Palermo, and places Guccia’s activities in the wider European context through comparisons with the formation of the London Mathematical Society and the creation of Mittag-Leffler’s Acta Mathematica in Stockholm. Based on extensive searches in European archives, this scholarly work follows both historical and scientific treads, and will appeal to those interested in the history of mathematics and science in general. (shrink)

When visual attention is directed away from a stimulus, neural processing is weak and strength and precision of sensory data decreases. From a computational perspective, in such situations observers should give more weight to prior expectations in order to behave optimally during a discrimination task. Here we test a signal detection theoretic model that counter-intuitively predicts subjects will do just the opposite in a discrimination task with two stimuli, one attended and one unattended: when subjects are probed to discriminate the (...) unattended stimulus, they rely less on prior information about the probed stimulus’ identity. The model is in part inspired by recent findings that attention reduces trial-by-trial variability of the neuronal population response and that they use a common criterion for attended and unattended trials. In five different visual discrimination experiments, when attention was directed away from the target stimulus, subjects did not adjust their response bias in reaction to a change in stimulus presentation frequency despite being fully informed and despite the presence of performance feedback and monetary and social incentives. This indicates that subjects did not rely more on the priors under conditions of inattention as would be predicted by a Bayes-optimal observer model. These results inform and constrain future models of Bayesian inference in the human brain. (shrink)

IntroductionThe prefrontal cortex plays a crucial role in cognition, particularly in executive functions. Cortical reactivity measured with Transcranial Magnetic Stimulation combined with Electroencephalography is altered in pathological conditions, and it may also be a marker of cognitive status in middle-aged adults. In this study, we investigated the associations between cognitive measures and TMS evoked EEG reactivity and explored whether the effects of this relationship were related to neurofilament light chain levels, a marker of neuroaxonal damage.MethodsFifty two healthy middle-aged adults from (...) the Barcelona Brain Health Initiative cohort underwent TMS-EEG, a comprehensive neuropsychological assessment, and a blood test for NfL levels. Global and Local Mean-Field Power, two measures of cortical reactivity, were quantified after left prefrontal cortex stimulation, and cognition was set as the outcome of the regression analysis. The left inferior parietal lobe was used as a control stimulation condition.ResultsLocal reactivity was significantly associated with working memory and reasoning only after L-PFC stimulation. No associations were found between NfL and cognition. These specific associations were independent of the status of neuroaxonal damage indexed by the NfL biomarker and remained after adjusting for age, biological sex, and education.ConclusionOur results demonstrate that TMS evoked EEG reactivity at the L-PFC, but not the L-IPL, is related to the cognitive status of middle-aged individuals and independent of NfL levels, and may become a valuable biomarker of frontal lobe-associated cognitive function. (shrink)

In Patel v. Midland Memorial Hospital & Medical Center, the U.S. Court of Appeals for the Fifth Circuit held that the defendant hospital did not violate the plaintiff's due process rights by suspending his clinical privileges without a pre-suspension hearing, where there were reasonable grounds for assuming that patient safety was at risk. Dr. P.V. Patel, a board-certified cardiologist, brought an action against Midland Memorial Hospital and several of its doctors, alleging that the suspension of his clinical privileges violated his (...) right to a pre-suspension hearing; was the result of racial discrimination; and resulted in anticompetitive behavior in violation of antitrust laws. The U.S. District Court for the Western District of Texas granted Midland's motion for summary judgment. The parties filed cross appeals, Dr. Patel on the ground that there were genuine issues of fact for all of his claims, and Midland on the ground that, with the exception of the civil rights claim, it was immune from all of Dr. Patel's claims under the Health Care Quality Improvement Act of 1986. (shrink)

In this paper we explore the following question: how weak can a logic be for Rosser's essential undecidability result to be provable for a weak arithmetical theory? It is well known that Robinson's Q is essentially undecidable in intuitionistic logic, and P. Hajek proved it in the fuzzy logic BL for Grzegorczyk's variant of Q which interprets the arithmetic operations as non-total non-functional relations. We present a proof of essential undecidability in a much weaker substructural logic and for a much (...) weaker arithmetic theory, a version of Robinson's R (with arithmetic operations also interpreted as mere relations). Our result is based on a structural version of the undecidability argument introduced by Kleene and we show that it goes well beyond the scope of the Boolean, intuitionistic, or fuzzy logic. (shrink)

Durante todo el último medio siglo Franz Hinkelammert ha venido representado uno de los manantiales inagotables en los que abreva el pensamiento crítico latinoamericano. Su creatividad y profundo desprejuicio frente a las absurdas normas de producción de conocimiento en la sociedad occidental y capitalista, le han permitido formular una de las impugnaciones más contundentes de la globalización neoliberal. Era necesario entonces un trabajo que diera cuenta de los avatares de su biografía, tant..

El libro que reseñaremos a continuación fue publicado en el año 2003 como primer número de la colección Thesys de la Editorial de la Universidad Católica de Córdoba, Argentina. Una pequeña nota en la contrasolapa nos informa que estamos, con esta colección, delante de “...una selección de obras de múltiples disciplinas, elaboradas a partir de los trabajos de Tesis de posgrado, presentadas y defendidas públicamente por docentes e investigadores de la U.C. de Córdoba., en distintas institucione..

El artículo con el título “Acerca de los progymnasmata” firmado con el nombre de Diony González Rendón fue publicado en la revista Escritos, vol. 16, No. 36 (enero-junio de 2008), pp. 260-282. Después de su publicación el día 10 de 0ctubre de 2012, el profesor Jose Antonio Fernández Delgado comunicó a la jefatura de la editorial UPB que este artículo era de su autoría y consideraba que era un plagio. En consecuencia, el profesor Delgado procedió a adjuntar las (...) evidencias necesarias para determinar que se ha había incurrido en un plagio por parte del señor Diony Gonzalez, de la obra titulada: “Influencia literaria de los progymnásmata” publicado en el libro J. A. Fernández Delgado, F. Pordomingo & A. Stramaglia (Eds.), Escuela y literatura en Grecia Antigua, Cassino 2007, pp. 273-306, libro que recoge los trabajos presentados en el simposio internacional que tuvo lugar en la Universidad de Salamanca del 17 al 19 de noviembre de 2004. Dicho libro se terminó de imprimir en mayo de 2007, según consta en sus datos de copy rightajun. (shrink)

Counting models for a two conjunctive formula $F$, a problem known as $\sharp $2Sat, is a classic $\sharp $P complete problem. Given a 2-CF $F$ as input, its constraint graph $G$ is built. If $G$ is acyclic, then $\sharp $2Sat can be computed efficiently. In this paper, we address the case when $G$ has cycles. When $G$ is cyclic, we propose a decomposition on the constraint graph $G$ that allows the computation of $\sharp $2Sat in incremental way. Let $T$ be (...) a cactus graph of $G$ containing a maximal number of independent cycles, and let $\overline{T}=-E)$ be a subset of frond edges from $G$. The clauses in $\overline{T}$ are ordered in connected components $\{K_1, \ldots, K_r\}$. Each $, i=1,\ldots,r$ is a knot of the graph. The arrangement of the clauses of $\overline{T}$ allows the decomposition of $G$ in knots and provides a way of computing $\sharp $2Sat in an incremental way. Our procedure has a bottom-up orientation for the computation of $\sharp $2Sat. It begins with $F_0 = T$. In each iteration of the procedure, a new clause $C_i \in \overline{T}$ is considered in order to form $F_i = $ and then to compute $\sharp $2Sat$$ based on the computation of $\sharp $2Sat$$. (shrink)

La relación médico-paciente (RMP) es una relación profesional-interpersonal base para la gestión de la salud. Nuestro objetivo fue desarrollar un instrumento que permitiera evaluar la presencia de los principios bioéticos en la atención médica recibida en la consulta externa de una institución hospitalaria. El instrumento quedó constituido por 21 reactivos para evaluar su confiabilidad y consistencia. El coeficiente de correlación intraclase fue de 0,81 (_p_.

En este texto confluyen logradamente varios géneros literarios: es una autobiografía, porque ante nuestros ojos vemos transcurrir parte de la vida del autor; pero también es un testimonio histórico, porque aborda acontecimientos verídicamente ocurridos en el Chile que existió entre los años 1965 y 1973. Paralelamente, estamos en presencia de un texto político, que aborda la problemática de la lucha de clases y su expresión en cuanto a correlación de fuerzas sociales, políticas y, al menos esb..

La Colección Fenomenología, de la Biblioteca de Ciencias Sociales y Humanidades, de la Editorial Siglo del Hombre se creó 4 años atrás, pero sólo en 2012 empieza a aparecer, con sus tres primeros volúmenes. El objetivo de la misma es presentar sistemáticamente la trayectoria intelectual de académicos en la disciplina, con sus respectivos diálogos. De este modo, lo que realiza la Colección con la obra en comento tiene que evaluarse en relación con los diálogos que tiene, implícita y explícitamente, con (...) otra obra—de Klaus Held, bajo el mismo sello en la misma Colección—. (shrink)

Los seis nombres reunidos en este libro forman “una constelación en el cielo de la historia”: seis autores que no compartieron las encendidas visiones de progreso infinito y felices transiciones hacia democracias estables y perpetuas, tan difundidas en las últimas décadas del siglo pasado. Tarea de justicia y de lucidez a la vez que resistencia contra esa pandemia, Gilly reivindica un arte de narrar la historia que posea, como pedía Walter Benjamin, el don de encender en el pasado la chispa (...) de la esperanza. (shrink)

W illia m o f Ockha m w a s a F rancisca n fria r , a theol o gia n an d a v e r y singula r philo sophe r . H e l i v e d a t a tim e o f crisi s an d durin g th e transitio n o f philosop h y an d theol o g y . Hi s secularis m i s manifeste d i n (...) th e defens e o f a radica l separatio n bet w ee n th e religious an d secula r p ow ers . Assigne d t o th e philosophica l cu r ren t o f nominalism , h e deal t a s e v ere b l o w t o th e metap h ysica l realis m o f Aristotl e an d Thoma s Aquina s an d h e ad v ocate d the separatio n o f reaso n an d f aith , bet w ee n philosop h y an d theol o g y an d thu s h e unde r mined th e ideol o gica l foundation s o f th e churc h o f hi s time . H e w a s accuse d o f heres y because o f hi s nominalism , althoug h h e himsel f condemne d P op e Joh n XXI I a s heretica l fo r his conceptio n o f p o v e r t y , a concep t f a r rem o v e d fro m ev angelica l principle s an d especial ly fro m th e notio n o f th e F rancisca n orde r . H e defende d th e separatio n o f churc h an d stat e and h e denie d th e P ope ’ s authorit y i n secula r matters . H e flat ly asse r te d freedo m o f conscience an d Luthe r too k hi m a s a teache r. (shrink)

"Libro sumamente valioso. Tras sendas visiones de conjunto, muy logradas, del positivismo en América Latina en general y en Venezuela en particular, siguen capítulos sobre: Adolfo Ernst; Rafael Villavicencio; Vicente Marcano; Lasandro Alvarado; Luis Razetti; Guillermo Delgado Palacios; Luis López Méndez; José Gil Fortoul; Laureano Vallenilla Lanz; César Zumeta y Manuel Arcaya. Tiende a hacer comparaciones con otras manifestaciones del positivismo latinoamericano"--Handbook of Latin American Studies, v. 58.

White-coated scientists versus black-robed preachers -- The images of evolution -- Doubts about Darwinism : an interview with Jonathan Wells -- Where science meets faith : an interview with Stephen C. Meyer -- The evidence of cosmology : beginning with a bang : an interview with William Lane Craig -- The evidence of physics : the cosmos on a razor's edge : an interview with Robin Collins -- The evidence of astronomy : the privileged planet : an interview with (...) class='Hi'>Guillermo Gonzalez and Jay Wesley Richards -- The evidence of biochemistry : the complexity of molecular machines : an interview with Michael Behe -- The evidence of biological information : the challenge of DNA and the origin of life : an interview with Stephen C. Meyer -- The evidence of consciousness : the enigma of the mind : an interview with J.P. Moreland -- The cumulative case for a creator -- Appendix -- Deliberations : questions for refection or group study. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 475 whereas in some texts Aquinas explicitly teaches that the higher senses of vision and hearing are the ones that mainly (praecipue, principaliter) lead to aesthetic experience.t5 Moreover, the statement that only in the thirteenth century was the question of the distinction between the higher and lower senses explicitly raised (p. l13f.), is true only if the author meant to exclude the pre-medieval or patristic as well (...) as the ancient period of philosophy.16 Finally, there is one technical weakness in this book that cannot be left unmentioned. The overwhelming majority of references are not to the original medieval texts treated and/or quoted in the three-volume edition, but to the number of volume and page in that edition. Thus the reader must be both familiar with French and in possession of the original three-volume work, or remain hopelessly frustrated every time he wishes to consult the original texts or at least know which texts are being mentioned. Yet, if one knows French, he does not need the English translation; and if he is also fortunate enough to have access to the original three-volume version, he will not need the abridged version of the original work at all. For this reason, should there be a second edition of this translation, the references should be changed from the l~tudes to the original medieval works. Although the negative remarks are more lengthy in this review than the positive evaluation is, it would be a grave mistake to conclude from this that the defects outweigh the value of the book. As a matter of fact, upon finishing the reading of this translation of De Bruyne's work, this reviewer was left with the conviction that, in the final balance, the reader can only greatly benefit from this work, and we all owe gratitude to the translator for having made this highly informative work available in the English language. FRANCIS J. KOVACH University of Oklahoma 1~ Summ. theol. I-II,27,1,ad 3; In Psalm. 44,2. ~6 Cf. Plato, Hipp. maL 298 A; Gorg. 474 D; Leg. XII, 961 D; Aristotle, De an. III,3, 429a 3; Augustine, De lib. arb. II,7, 16-19; 14,38; De ord. II,ll, etc. Le origini del metodo analitico: il Cinquecento. By Angelo Crescini. (Udine: Del Bianco, 1965. Published by the Istituto di Filosofia, Facnlt~ di Lettere e Filosofia of the Universit~ degli Studi di Trieste. Pp. 340. L 5,000) Professor Crescini has certainly picked a topic of great interest upon which to write. Recent students of Renaissance logic such as N. W. Gilbert, V. Mufioz Delgado, W. Ong, G. Papuli, W. Risse, and C. Vasoli have pointed out the vitality and significance associated with the development of the logical thought of the period. The general question of methodology has produced an enormous scholarly literature in recent years,I but much remains to be done before we fully understand how various methodologies have evolved and what relation philosophical discussions of method have had to the actual practice of science. Therefore, it would be most desirable to have a 1 For further information see Laurens Laudan, "Theories of Scientific Method from Plato to Mach: A Bibliographical Review," History of Science 7 (1968), 1-63. 476 HISTORY OF PHILOSOPHY detailed, comprehensive, and accurate study of the evolution of analytic method during the sixteenth century, particularly in view of the significance taken on by such a methodology with the 'rise of modern science'. With such a background in view the reviewer comes to this volume in anticipation of being generally enlightened on various matters. Unfortunately, Crescini's book is on the whole disappointing, although nearly everyone will find the odd bit of information of which he was not previously aware. It definitely does not, however, establish a solid foundation for later studies. The book is organized into three principal parts, dealing with the development of the analytic method in logic (pp. 21-188), in the natural sciences (pp. 189-284), and in mathematics (vv. 285-328). The first section treats discussions of the topic among writers on logical subject, under which heading are included 'humanist' logicians such as... (shrink)

Pensamientos desde Berlín, pensamientos sobre Berlín; lo que el autor ve, siente, percibe y lo que capta en relación con todo su amplio bagaje de lecturas. Ver, entender, leer, del ojo a la pluma, del recuerdo a la pluma, magia o realidad de un encuentro.

Books reviewed in this article: The Anchor Bible Dictionary. Edited by David Noel Freedman with Gary A. Herion, David F. Graf, John David Pleins. The Gospel of Matthew. By Daniel J. Harrington. Paul: An Introduction to his Thought. By C. K. Barrett. A Radical Jew: Paul and the Politics of Identiy. By Daniel Boyarin. New Testament Theology. By G. B. Caird, completed and edited by L. D. Hurst. The Fatherhood of God from Origen to Athanasius. By Peter Widdicombe. Dieu et (...) le Christ selon Grégoire de Nysse. By Bernard Pottier. Eucharistic Presence: A Study in the Theology of Disclosure. By Robert Sokolowski. Theological Hermeneutics: Development and Significance. By Werner Jeanrond. Theologie aus Efahrung der Gnade. Annäherungen an Karl Rahner: Edited by Mariano Delgado and Mathias‐Lutz Bachmann. Bernhard Welte's Fundamental Theological Approach to Christology.. By Anthony J. Godzieba. Sacred Identity: Exploring a Theology of the Person. By Jane Kopas. A Salvation Audit. By Colin Grant. Medical Ezhics: Sources Of Catholic Teachings, Second Edition. Edited by Kevin O'Rourke and Philip Boyle. Mission and Conversion: Proselytizing in the Religious History of the Roman Empire. By Martin Goodman. Literacy and Power in the Ancient World. Edited by Alan K. Bowman and Greg Woolf. St Cyril of Alexandria: The Christological Controversy. Its History, Theology and Texts. By John A. McGuckin. Ambrose of Milan: Church and Court in a Christian Capital. By Neil B. McLynn. Basil of Cuesareu. By Philip Rousseau. Augustine. By Mary T. Clark. Irenaeus. By Dennis Minns. Divine Heiress: The Virgin Mary and the Creation of Christian Constantinople. By Vasiliki Limberis. The Irish Tradition in Old English Literature. By Charles D. Wright. Relics, Apocalypse and the Deceils of History: Ademar of Chabannes, 989–1034. By Richard Landes. Huguccio: The Life, Works, and Thought of a Twelfth‐Centuy Jurist. By Wolfgang P. Müller. The Presence of God: A History of Western Christian Mysticism, Volume II: The Growth of Mysticism. By Bernard McGinn. Preaching the Crusades: Mendicant Friars and the Cross in the Thirteenth Century. By Christoph T. Maier. Mary Ward: A World in Contemplation. By Henriette Peters. The Letters of Teilhard de Chardin and Lucile Swan. Edited by Thomas M. King and Mary Wood Gilbert. Pseudo‐Marry: By John Donne. Edited, with an Introduction and Commentary, by Anthony Raspa. Donne and the Politics of Conscience in Early Modern England. By M. L. Brown. The Caroline Captivity of the Church: Charles 1 and the Remoulding of Anglicanism. By Julian Davies. Érudition et religion aux XVIIe et XVIIIe siécles. By Bruno Neveu. Cardinal Lavigerie: Churchman, Prophet and Missionary. By François Renault. Dom Columba Marmion: A Biography By Mark Tierney. Christian Mission in the Twentieth Century. By Timothy Yates. Religion in Africa: Experience and Expression. Edited by Thomas D. Blakely, Walter E. A. van Beek and Dennis Thomson. (shrink)