BackgroundOrgan donation has become one of the most effective ways to save lives and improve the quality of life for patients with end-stage organ failure. No previous studies have investigated the preferences for the different consenting options for organ donation in Egypt. This study aims to assess Egyptians’ preferences regarding consenting options for posthumous organ donation, and measure their awareness and acceptance of the Egyptian law articles regulating organ donation.MethodsA cross sectional study was conducted among 2743 participants over two years. (...) Each participant was required to rank eleven consenting options from 1 to 11, and to report his awareness and acceptance of the seven articles of the Egyptian law of organ donation.Results47% of the participants expressed willingness to donate their organs after death. This percentage increased to 78% when consenting options were explained to participants. “Informed consent by donor only” was the most preferred type of consent for one third of respondents. Awareness of the law articles regulating organ donation was relatively low ranging from 56% to 23%.ConclusionCurrently, around half of the Egyptian population agree to posthumous organ donation. This percentage could be increased significantly by raising the awareness about how the process of donation could be regulated and how the patient’s right of decision could be protected. (shrink)

The ternary xV2O5–(40 − x)Li2O–60B2O3 glass system, where x = 1, 2, 3, 4 and 6 mol%, was prepared by normal quenching. Ultrasonic velocities and attenuation were measured at room temperature using a pulse-echo technique. Various parameters, such as elastic moduli, micro-hardness, Poisson's ratio and Debye temperature, were determined from the measured densities and velocities. The composition dependence of these parameters, in addition to the glass-transition temperature, suggested that vanadium ions were incorporated into these glasses as a network modifier, resulting (...) in the reconversion of BO4 tetrahedra to BO3 triangles by the breaking of B–O–B linkages and the formation of nonbridging oxygens (NBOs). The outcome was a reduction in network connectivity and rigidity with increasing V2O5 content. The results are explained quantitatively in terms of fractal bond connectivity, average atomic volume, network dimensionality, packing density, number of network bonds per unit volume, cross-link density and atomic ring size. The Makishima and Mackenzie model appears to be valid for the studied glasses when the fate of BO4 tetrahedra and creation of NBOs are taken into account. (shrink)

BackgroundBurnout is a syndrome that results from stressors in the work environment that have not been successfully managed. The prevalence of burnout among schoolteachers was always controversial. COVID-19 pandemic added more stressors to teachers since they had to change their working styles in response to the pandemic lockdowns or curfews. In Saudi Arabia, the prevalence and determinants of burnout among school teachers were not measured by any other group during the COVID-19 pandemic stressors.MethodsA cross-sectional survey was conducted among 879 teachers (...) in the Jazan region, Saudi Arabia, using the Maslach Burnout Inventory, during April 2021. Multistage cluster random sampling was used.ResultsThe mean age of the participants was 41.4 years. Male teachers represented 52.6% of the participants while females represented 47.4%. Most teachers showed burnout symptoms. Consequences of burnout were observed, such as using psychotropic medications, absenteeism, lack of job satisfaction, and changing schools. Using the MBI scale, most teachers showed medium or high emotional exhaustion, low depersonalization, and low personal accomplishment.ConclusionMost teachers showed symptoms of burnout during the COVID-19 pandemic. Being an expert and ability to adapt to technology during the COVID-19 pandemic proved to effectively reduce burnout symptoms. Increasing incentives, early detection, and improving the work environment is recommended to diminish burnout consequences. (shrink)

Currently there are persistent doubts about the meaning and contributions of the gene concept, mostly related to its interpretation as a stretch of DNA encoding a single functional product, i.e., the classical molecular gene concept. There is, however, much conceptual variation around genes, leading to important difficulties in genetics teaching. We investigated whether and how conceptual variation related to the gene concept and gene function models is present in school science and what potential problems it may bring to genetics teaching (...) and learning. Here, we report results on how ideas about genes and gene function are treated in textbooks and appear in students’ views and, also, about a teaching strategy for improving higher education students’ understanding of scientific models and conceptual variation around genes and their functions. (shrink)

In this article, the main definitions and differentiation concepts of neutrosophic fuzzy environment will be reviewed. This article will introduce an analytical methodology for solving the second-order linear ordinary differential problem with neutrosophic fuzzy boundary values, this analysis will be under generalized Hukuhara differentiability to show the analytical solutions from a different point of view for the uncertain system, some of these solutions may be decreasing in uncertainty or maybe reflecting the behavior of some real-world systems better. Some applications and (...) numeral examples will be solved to show the behavior of the solution. (shrink)

A partir de un análisis "a posteriori" de los objetivos de las ciencias experimentales, es posible establecer el papel que en su método desempeña el control experimental. Aunque las formas concretas que adopta en las diversas ciencias y en las distintas etapas del trabajo científico varían, la función determinante que asume en la construcción del objeto científico es común a todas ellas, y permite deducir una serie de características acerca de la naturaleza y alcance del método científico-experimental, como su irreductibilidad (...) tanto a categorías lógicas como empíricas, y su peculiar fiabilidad. (shrink)

BackgroundHuntington’s disease has a poor prognosis. For HD patients in the Netherlands, one way of dealing with their poor prognosis is by drawing up an advance euthanasia directive. Little is known about the perspectives of HD patients on their AED.AimTo gain insight into patients’ views on and attitudes towards their AED, and changes over time.MethodsA longitudinal qualitative interview study using 1 to 6 semi-structured interviews over a period of maximum three years. Nine HD patients who either had an AED or (...) were thinking about drawing it up participated in this study.ResultsWe identified two themes that characterize patients’ perspectives on their AEDs: general character of the AED; uncertainty around their AED. Ad The conditions that the participants described in their AED were generally not very specific for the person. Mostly they were general notions of unbearable suffering. Familiarity with HD in the family could play a role in drawing up an AED. Ad Participants generally were aware of the tentative character of their AED and could have doubts concerning their own willingness or the willingness of others in the future. Sometimes these doubts were so great, that it prevented them from drawing up an AED. However, patients did not alter their AED during the follow-up period or changed in their view or attitude on their AED.ConclusionHD patients that draw up an AED usually describe general conditions for euthanasia and recognize that these conditions may change as the disease progresses. An AED or the wish to draw one up may be a good conversation starter for conversations about goals and preferences for future care. (shrink)

The actual “crisis of care” in western societies highlights the limits of a sex/gender based citizenship and the persistence of the subordination of women. The fact that women are responsible for the provision of care in domestic units has never been a matter of difference but a matter of subordination against which we have developed legal strategies, such as anti-discrimination law, and political strategies, such as increasing the presence of women in decision-making. The paper shows some of these strategies and (...) their limits and argues that we need to resignify citizenship in a way that includes human dependency and the webs of relationships, both local and global, this dependency creates. (shrink)

Few figures of the Middle Ages command the attention of so many modern disciplines as Robert Grosseteste (c. 1170-1253). Theology, Philosophy, History, and Science are all areas which his life and thought continue to have significance and to inspire re-interpretation. Accompanied by a series of original commentaries, this new edition of Grosseteste's work, with English translation, draws together the perspectives of modern scientists and medieval specialists. Volume I of a six volume series, Knowing and Speaking presents two of the earliest (...) of Grosseteste's works, the treatises On the Liberal Arts and On the Generation of Sounds. These are accompanied by a significant Middle English treatise on the Seven Liberal Arts whose anonymous fifteenth-century author translated and excerpted passages from Grosseteste's treatises in a re-imagining of their structure and function.0Each work is treated separately within the volume, which is constructed in three parts. On the Liberal Arts sets Grosseteste's thoughts on the arts subjects and emphasises moral concerns about the purpose of learning. On the Generation of Sounds builds on the theories and statements of On the Liberal Arts in connection to the production of sound, elaborating the earlier position, relating the generation of sounds to human vocal and speech production. (shrink)

El texto que presentamos recoge las principales conclusiones que han derivado de los estudios sobre la Colección de documentos árabes del Archivo Histórico Provincial de Granada. Compuesta principalmente por documentos de carácter jurídico, el análisis del contenido de cada uno de ellos en relación con la materialidad del soporte y las tintas así como la coincidencia en el diseño y planificación de la página revelan el uso de idénticos protocolos de ejecución. Esta investigación nos está permitiendo, además, establecer coincidencias relevantes (...) relacionadas con los procesos de elaboración del papel entre los últimos años de permanencia de los árabes en la Península Ibérica y los primeros tras la incorporación del territorio a la Corona de Castilla y, sobre todo, con el modo de ejecutar el documento de archivo en sus formas externa e interna. (shrink)

In the present paper, we consider a bio-economic equilibrium model which describes the dynamics of a fish population fished by several fishermen seeking to maximize their profits. Each fisherman tries to find the fishing effort which maximizes his profit at biological equilibrium without any consultation with others, but all of them have to respect two constraints: (1) the sustainable management of the resources ; and (2) the preservation of the biodiversity. With all these considerations, our problem leads to a generalized (...) Nash equilibrium problem. The objective is to show that even when a fisherman i\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$i$$\end{document} provides a fishing effort equal to twice the fishing effort of a fisherman j\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$j$$\end{document}, then the profit of fisherman i\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$i$$\end{document} is not necessarily double that of fisherman j\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$j$$\end{document}. (shrink)

Nuestra investigación etnográfica (2019- 2020) en torno a las exhumaciones de fosas comunes del franquismo en el cementerio de Paterna (Valencia) planteó una serie de cuestiones sobre la importancia de realizar una aproximación biográfica a los escenarios de violencia y perpetración. Esto nos proporciona una potente herramienta de análisis que permite ir más allá de la mera secuencia temporal de los hechos y los espacios, dotándolos de agencia propia. Además, permite situar en el centro del debate otras memorias, las de (...) las mujeres, que, debido a las características de los actuales procesos de exhumación, se han ido desplazando hacia los márgenes. (shrink)

Shaʻar ha-ṭohorah. Liḳuṭim mi-Sefer ḥasidim -- Śiḥot u-maʼamarim.

La naturaleza - La vida - El hombre - Homo Sapiens - Homo Sapiens : lo bello, el sexo y el amor - La sociedad : ética y política - Los dioses.

Bu makalenin [amacı], Osmanlı âlimlerinden Dâvûd Karsî’ye (ö. 1756 [?]) ait el-Îsâgûcî el-Cedîd’in t kikli neşrini ortaya koymaktır. Tahkik çalışması; eserin geniş bağlamını, müellifinin biyografisine genel bir bakışı ve içeriğinin bir incelemesiyle birlikte Ebherî’nin (ö. 663/1265) daha eski Îsâğûcî’si ile bir karşılaştırmasını içeren bir giriş ile başlamaktadır. Ebherî’nin orijinalinden yaklaşık iki kat daha uzun olan Karsî’nin eseri, 13. yüzyıldan itibaren Arabî mantık geleneğinde meydana gelen bazı önemli tartışmaların bir göstergesi konumundadır. Eser, müellifn kendi yapıtının, daha eski bir el kitabının “yeni” (...) (cedîd) bir versiyonu olduğunu vurgulaması bakımından da dikkate değerdir ki bu, 18. yüzyılın ortalarında bir Osmanlı medrese âlimi tarafından cedîd kavramına biçilen olumlu değere işaret etmektedir. (shrink)

In Plato’s Theaetetus , Socrates is portrayed as a midwife to the intellect, a metaphor for his task as a dialectician as he seeks to help give birth to wisdom. Thus it is that the author refers to Plato as the midwife’s apprentice. This volume represents an attempt to provide a more manageable account of the author’s two volume magnum opus, An Examination of Plato’s Doctrines . An accessible and lucid introduction to Plato’s ideas is provided which nonetheless challenges traditional (...) interpretations. In particular the author is concerned to offer an interpretation of the significance of what Plato said. The chapters are arranged by topic, for ease of comprehension. (shrink)

Ayetler, ele aldıkları konular itibariyle geniş bir konu yelpazesine sahiptir. Bu konuları ise bazen doğrudan ve yoruma gerek bırakmayacak şekilde bazen de bu netlikte olmadan ortaya koyarlar. Bu durum, ayetle muhatap olan kişinin metni doğru anlamasında belli bir yöntem ve birikime sahip olmasını gerekli kılar. Bu ise muhatabın metni anlama ve yorumlamasında, sahip olduğu bakış açısının etkisini baskın hale getirir. Bu bağlamda ahkâm ayetlerine bakıldığında onların sınırlı ve bazı alanları düzenleyici oldukları görülür. Ayrıca içerdikleri ahkâma dair de çoğu kez farklı (...) yorumlanabilecek bir üslûba sahiptirler. Bu durum, onları anlamaya çalışan fukaha için bir taraftan geniş bir yorum sahası açarken diğer taraftan yapılan yorumda hesabı verilebilirlik unsurunu öne çıkartır. Bu zeminde ahkâma dair ayetler, fakihler tarafından çeşitli yorumlara tabi tutulmuştur. Ayetlerden hüküm çıkarmaya çalışan bu ilim adamları, çeşitli etkenler altında bu ameliyeyi gerçekleştirmişlerdir. Bu etkenlerden bir tanesi de takip edilen amelî mezheptir. Bu makale, ahkâm tefsirlerinin ilklerine sahip olan, bununla birlikte farklı fıkhî mezheplere tabi bulunan üç fakih-müfessir üzerinden meselenin bu veçhesine eğilmektedir. Bu sayede mevcut etkinin varlığı, ne boyutta olduğu gibi hususlarda bir fikir elde edilebilecektir. (shrink)

Cuand o l a edició n d e est e númer o d e lo s Anale s d e l a Cáted r a F r ancisc o Suá r e z estab a a punt o d e ce r rars e no s so r prendi ó e l f allecimient o d e fo r m a repentina e inesperad a d e Nicolá s Lópe z Calera , Directo r d e est a pu b (...) licació n durant e más d e cuarent a años . P ar a tod o e l equip o editoria l qu e fo r mamo s pa r t e d e lo s A CFS s u mue r t e h a signi f icad o un a pérdid a i r repara b l e po r l a huell a imbo r ra b l e qu e su labo r académic a y dedicació n un i v ersitari a h a dejad o entr e todo s nosotros. (shrink)

I describe an octagon of opposition and equivalence developed by fourteenth-century logicians, in particular by Jean Buridan in his Summulae de dialectica. This «square» of opposition displays complex logical relations, one of which is not found in the traditional square of opposition. The octagon allows expression of three kinds of sentences: quantified modal sentences, oblique sentences, and sentences with quantified predicates. The octagon shows that medieval logicians were working with a logic of relations, an identity logic, and a modal logic (...) not unlike the logic of our own day. (shrink)

Las observaciones que Kant formula en sus obras críticas acerca de la existencia de la cosa en sí han dado lugar a importantes objeciones y agudas discusiones entre los intérpretes. En este trabajo proponemos una reflexión acerca de la posibilidad de establecer el estatus epistemológico correspondiente a dichas observaciones, haciendo uso del concepto kantiano de creencia doctrinal.

Este trabajo se inscribe en una revisión in progress del Derecho antidiscriminatorio moderno que las autoras vienen efectuando desde hace más de tres lustros. En la primera parte del mismo se examinan los textos de una f ilósofa política y de dos juristas esta- dounidenses (I. M. Young, C. A. MacKinnon y K. Crensahw) que inspiran la propuesta de un concepto de discriminación y de una visión de la interseccionalidad basados en el reconocimiento de los sistemas de opresión. La segunda (...) parte se centra en el análisis del concepto de discriminación múltiple o interseccional propuesto por la doctrina jurídica española a partir de la jurisprudencia referida al caso de una mujer (“La Nena”) casada por el rito gitano que ve denegada su pensión de viudedad. A partir de lo anterior, el trabajo concluye con una serie de propuestas entre las que destacan las referidas a la necesidad de evitar que el discurso sobre la interseccionalidad disuelva la identidad política de los grupos en la individualidad, refuerce el sistema sexo-género y consolide un Derecho antidiscriminatorio de corte excesivamente jurisprudencial. (shrink)

The framework of this paper is a defence of Burnet's construal of Apology 30b 2-4. Socrates does not claim, as he is standardly translated, that virtue makes you rich, but that virtue makes money and everything el se good for you. This view of the relation between virtue and wealth is paralleled in dialogues of every period, and a sophisticated development of it appears in Aristotle. My philological defence of the philosophically preferable translation extends recent scholarly work on eínai in (...) Plato and Aristotle to gígnesthai, which is the main verb in the disputed sentence. When attached to a subject, both verbs make a complete statement on their own, but a statement that is further completable by adding a complement. The important point is that the addition of a complement does not change the meaning of the verb from existence to the copula. Proving this is a lengthy task which takes me into some of the deeper reaches of Platonic and Aristotelian ontology, and into discussion of whether Greek ever acquired a verb that corresponds to modem verbs of existence. I conclude that even when later authors such as Philo Judaeus, Sextus Empiricus and Plotinus debate what we naturally translate as issues of existence, none of the verbs they use (eínai, úpárkhein, úphestekénai) can be said to have existential meaning. (shrink)

The First Islamic Reviver: Abū Ḥāmid al-Ghazālī and His Revival of the Religious Sciences. By Kenneth Garden. New York: Oxford University Press, 2014. Pp. xiii + 238. $65, £41.99. Al-Ghazālī’s Moderation in Belief: Al-Iqtiṣād fī al-iʿtiqād. Translated by Aladdin M. Yaqub. Chicago: Chicago University Press, 2013. Pp. xxvii + 311. $50, £35.

En este ensayo su autor revisita el tópico fenomenología trascendental e historia 12 años después de la publicación de un trabajo amplio sobre el tema. El escrito esta dividido en tres partes donde se muestras acuerdos y discrepancias con esa interpretación inicial. En la primera se rebate la tesis tan extendida de que la fenomenología de Husserl es alérgica a la historia y se establece una conjetura razonable sobre por qué, y a pesar de la evidencias en contra, sigue todavía (...) bastante vigente esa idea entre los no versados en su obra. En la segunda parte, se muestra en positivo la articulación entre fenomenología e historia y se concluye que la manera quizá más adecuada de entender el sentido último del pensamiento de Husserl es comprenderlo como una teoría transcendental de la historia. Para mostrar esto se expondrá, en primer lugar, el hecho crucial del paso de la fenomenología estática a la fenomenología genética. En segundo lugar, se incidirá en la mutua interconexión entre historia intencional, a priori de la historia y filosofía o teleología de la historia. Por fin, en una tercera y última parte, se realizan algunas valoraciones críticas de las ideas husserlianas. También una autocrítica de algunas partes del mencionado trabajo publicado hace 12 años. Todas tienen que ver, en última instancia, con lo que hoy entiendo como excesiva potencia de la teleología de la historia y la idea de racionalidad y fundamento que la animan.In this essay, the author revisits the topic transcendental phenomenology and history 12 years after the publication of a book on the subject. The paper is divided into three parts and shows agreements and discrepancies with that initial interpretation. The first part contradicts the widespread thesis that Husserl's phenomenology is allergic to history, and develops a conjecture about why, despite the evidence to the contrary, this thesis is still quite common among those not strictly versed in Husserl’s work. The second part shows the positive articulation among phenomenology and history. It concludes that the best way to understand the ultimate meaning of Husserl's thought is considering it as a transcendental theory of history. In order to show the plausibility of this reading, this part of the essay will expose, first, the step from static to genetic phenomenology, and secondly, the mutual interconnection between intentional history, a priori of history, and philosophy or teleology of history. Finally, in a third and final part, some critical assessments of Husserl's ideas are made, also a criticism of the mentioned book of the author of the paper published 12 years ago. They are concerned, ultimately, with what I now understand as an excessive power of teleology of history and the idea of rationality and foundation that animates it. (shrink)

Resumen El presente ensayo explora el alcance que poseen para la pregunta fundamental por la vida buena las reflexiones que Harry Frankfurt ha elaborado acerca de la importancia que atribuimos a ciertas cosas en general, y acerca del amor como una forma señalada en que alguien o algo puede sernos importante. Comienzo examinando las razones por las que, según el autor, resulta imposible ofrecer una respuesta no circular a dicha pregunta, razones que vuelven necesario un modo indirecto de abordarla. A (...) partir de la noción frankfurtiana de importancia propongo a continuación una crítica a la llamada teoría del deseo, el enfoque más influyente en las discusiones actuales en torno al bienestar o la vida buena. Finalmente, y luego de referirme a la necesidad, apuntada por Susan Wolf, de tomar en cuenta el valor objetivo de aquello que nos importa, presento dos consideraciones mediante las cuales intento, con y contra Frankfurt, destacar lo que me parece más valioso de sus ideas acerca del amor.This essay explores the impact of Harry Frankfurt’s reflections on the importance we attach to certain things in general, as well as on love as a marked way in which something or someone can be important to us, to the fundamental question of the good life. I begin by examining the reasons why, according to the author, it is impossible to offer a non-circular answer to this question, reasons that make necessary an indirect way of approaching it. Starting from the Frankfurtian notion of importance, I then propose a critique of the so-called theory of desire, the most influential approach in current discussions about well-being or the good life. Finally, and after referring to the need, pointed out by Susan Wolf, to take into account the objective value of what matters to us, I present two considerations through which I try, with and against Frankfurt, to highlight what seems most valuable to me of his ideas about love. (shrink)

... all probability, Plato's own statement; made indeed to be read by friends in Syracuse in explanation of the role he had played ...

En el siguiente artículo intentaremos mostrar cómo la definición de Contingencia individual, dentro del discurso de Richard Rorty, genera ciertos problemas. Este autor menciona que debemos deslastrarnos de las siguientes dicotomías conceptuales: objetivo-subjetivo, moralidad-prudencia, apariencia-realidad, esencia-accidente, absoluto-relativo, entre otras. A todo esto Rorty propone un nuevo concepto: Contingencia, el cual sería una definición útil que lograría justificar la desaparición de las concepciones como algo que petrifica el conocimiento y lo hace inútil para entender la realidad, es decir, el conocimiento no (...) sería útil en el momento en que intenta “representar” la realidad porque la vacía. Luego de un recorrido por algunos autores representativos en lo concerniente a la conceptualización de “esencia”, nuestra conclusión es que la definición de Contingencia rortyana es una nueva petrificación de la realidad, es decir, Contingencia también termina “representado” lo que es “real”. Is Contingency an essence? A review of the theory of Contingency in Richard RortyIn the following article, it is shown how the definition of individual Contingency, within the discourse of Richard Rorty, produces certain problems. This author mentions we should put an end of the following conceptual dichotomies: objective-subjective, morality-prudence, appearance-reality, essence-accident, and absolute-relative, among others. To all this Rorty proposes a new concept: Contingency, which could be a useful definition which would achieve the justification of the loss of conceptions as something that petrifies knowledge, and renders it useless for understand reality, i.e., knowledge is not useful in the moment you try to "represent" reality because simply empties it. After a tour of some representative authors with regard to the conceptualization of "essence", our conclusion is that the definition of Rorty's Contingency is a new petrifaction of reality, i.e., Contingency also ends "representing" what is "real.". (shrink)

This article presents two short but complete treatises on legal theory. The first was written by Ibn Surayj as an addendum to his compendium on Shāfiʿī law, al-Wadāʾiʿ, and the second by Abū Bakr al-Khaffāf, who included it as an introduction to his legal text al-Aqsām wa-l-khiṣāl. An analysis of these texts reveals the existence of a self-conscious legal-theoretical discourse around the turn of the fourth/tenth century that connects al-Shāfiʿī’s Risāla with the so-called mature uṣūl tradition known from the late (...) fourth/tenth century onward. The analysis also sheds considerable light on developments in legal theory in this period, such as the emergence of the term ʿilla, the parallel rise of legal dialectics, the consequences of adopting the idea of waḍʿ, and generally the inclusion of theological concerns in legal theory. (shrink)

Quantum physics is believed to be the fundamental theory underlying our understanding of the physical universe. However, it is based on concepts and principles that have always been difficult to understand and controversial in their interpretation. This book aims to explain these issues using a minimum of technical language and mathematics. After a brief introduction to the ideas of quantum physics, the problems of interpretation are identified and explained. The rest of the book surveys, describes and criticises a range of (...) suggestions that have been made with the aim of resolving these problems; these include the traditional, or 'Copenhagen' interpretation, the possible role of the conscious mind in measurement, and the postulate of parallel universes. This new edition has been revised throughout to take into account developments in this field over the past fifteen years, including the idea of 'consistent histories' to which a completely new chapter is devoted. (shrink)

Entre las valiosas piezas que conforman el rico tesoro de la catedral hispalense destacan un cáliz y un copón de oro y piedras preciosas, joyas sobre las que existen pocas y confusas noticias. En este artículo se aclaran definitivamente diversos aspectos sobre su origen, autoría y ejecución.