Este trabajo repasa los distintos métodos de cálculo que los astrónomos y matemáticos árabes medievales desarrollaron para ser aplicados a la práctica astrológica de la división de casas. Partiendo de una clasificación de estos métodos establecida por J.D. North (1986) y ampliada por E.S. Kennedy (1996), se recoge la información que se halla en estudios anteriores y se presentan nuevos datos como resultado del análisis de fuentes exploradas más recientemente, destacando ciertos elementos pertenecientes a una tradición astrológica occcidental.

Chimpanzees follow the gaze of conspecifics and humans — follow it past distractors and behind barriers, ‘check back’ with humans when gaze following does not yield interesting sights, use gestures appropriately depending on the visual access of their recipient, and select different pieces of food depending on whether their competitor has visual access to them. Taken together, these findings make a strong case for the hypothesis that chimpanzees have some understanding of what other individuals can and cannot see. However, chimpanzees (...) do not seem nearly so skillful in the Gesture Choice and Object Choice experimental paradigms. Neither behavioral conditioning nor theory of mind explanations can account for these results satisfactorily. Instead this chapter proposes the idea that chimpanzees have the cognitive skills to recall, represent, categorize, and reason about the behavior and perception of others, but not their intentional or mental states, because they do not know that others have such states since they cannot make a link to their own. Human beings began their own evolutionary trajectory with these same skills, but then at some point in their evolution (probably quite recently) they began to understand that their own experience could serve as some kind of model for that of other persons. This allowed for even better prediction and control of the behavior of others and better communication and cooperation with them as well, and so it was an adaptation with immediate adaptive consequences that ensured its survival. (shrink)

This paper contains a joint study of two sentential logics that combine a many-valued character, namely tetravalence, with a modal character; one of them is normal and the other one quasinormal. The method is to study their algebraic counterparts and their abstract models with the tools of Abstract Algebraic Logic, and particularly with those of Brown and Suszko's theory of abstract logics as recently developed by Font and Jansana in their "A General Algebraic Semantics for Sentential Logics". The logics studied (...) here arise from the algebraic and lattice-theoretical properties we review of Tetravalent Modal Algebras, a class of algebras studied mainly by Loureiro, and also by Figallo, Landini and Ziliani, at the suggestion of the late Antonio Monteiro. (shrink)

ukasiewicz''s four-valued modal logic is surveyed and analyzed, together with ukasiewicz''s motivations to develop it. A faithful interpretation of it in classical (non-modal) two-valued logic is presented, and some consequences are drawn concerning its classification and its algebraic behaviour. Some counter-intuitive aspects of this logic are discussed in the light of the presented results, ukasiewicz''s own texts, and related literature.

Abstract: There is much that I admire in Richard Moran's account of how first-person authority may be consistent with self-knowledge as an achievement. In this paper, I examine his attempt to characterize the goal of psychoanalytic treatment, which is surely that the patient should go beyond the mere theoretical acceptance of the analyst's interpretation, and requires instead a more intimate, first-personal, awareness by the patient of their psychological condition.I object, however, that the way in which Moran distinguishes between the deliberative (...) and the theoretical attitudes is ultimately inconsistent with a satisfactory account of psychoanalytic practice; mainly because, despite Moran's claims to the contrary, such a distinction is still inspired by a Cartesian picture of the self. I argue that, in the light of his distinction, Moran may emphasize that an agent's psychological dispositions should be permeable to her decisions and projects, but is forced to reject the idea that permeability could go the other way too. I explore Bernard Williams' notion of acknowledgment and Simone Weil's distinction between two notions of necessity, in order to articulate a notion of receptive passivity which may help us to characterize this second direction of permeability. I finally outline why receptive passivity (and, thereby, the double direction of permeability) is crucial in order to identify the goal of psychoanalytic treatment and, derivatively, to understand how a certain kind of awareness may have a significant therapeutic effect. (shrink)

This volume includes a lucid discussion of recent developments by philosophers such as Block, Davidson, Fodor, Kim, Lewis, Mellor, Putnam, Schiffer, Shoemaker, ...

This paper reviews the development of socially responsible investment (SRI) in the Spanish financial market. The year, 1997 saw the appearance in Spain of the first SRI mutual fund, but it was not until late 1999, that major Spanish fund managers offered SRI mutual funds on the retail market. The development of SRI in the Spanish financial market has not experienced the high levels of development seen in other European countries, such as France or Italy, where interest in SRI began (...) during the same period. This paper presents an analysis of the impact of SRI mutual funds managed by Spanish fund managers comparing the evolution of managed assets and number of investors. We also analyse the investment strategies adopted by these funds, which mainly use negative screening criteria and the participation of non-governmental organisations as institutional investors. An analysis of the take up of socially responsible investment in the Spanish financial market shows majors deficits in this process. This is due to Spanish investors having limited sensitivity to social issues and knowledge of SRI, and a lack of development of SRI investment strategies, such as engagement or shareholder activism by fund managers. Furthermore, the take-up of SRI mutual funds in the Spanish financial market coincided with a fall in the stock market at the beginning of the 21st Century. We conclude with an analysis of the relationship between SRI and Corporate Social Responsibility (CSR). (shrink)

Robert Dunn and Richard Moran have emphasized the importance of deliberation to account for the privileged authority of self-ascriptions. They oppose a theoretical attitude toward oneself to a deliberative attitude that they regard as more intimate, as purely first-personal. In this paper, I intend to challenge Dunn’s and Moran’s understanding of how the deliberative attitude is to be conceived of and, in particular, I will call into question their claim that this attitude is wholly non-observational. More positively, I will elaborate (...) on the sort of self-observation that must play a central role in an agent’s deliberation if she is to recognize a certain belief, decision, or intention as genuinely her own and, therefore, as expressing a purely first-person point of view. In the elaboration of my argument, I will rely on a number of situations as they are described in Peter Carey’s novel Oscar and Lucinda. (shrink)

In this paper, we review the conventional analyses of management control systems, to conclude, first, that the illusion of control can mislead managers into believing that everything can be controlled and monitored, and, second, that no incentive system based only on extrinsic rewards can motivate individuals properly. Then, we investigate the philosophical foundations of the basic assumptions that, implicitly or explicitly, are made about the nature of the acting person. Based on personalist phenomenology, we show how the development of technical (...) and moral values is crucial to the long-run survival of organizations. We end by offering some guidelines as to what control systems should be like in order to be compatible with the nature of human persons. (shrink)

This is a contribution to the discussion on the role of truth degrees in manyvalued logics from the perspective of abstract algebraic logic. It starts with some thoughts on the so-called Suszko’s Thesis (that every logic is two-valued) and on the conception of semantics that underlies it, which includes the truth-preserving notion of consequence. The alternative usage of truth values in order to define logics that preserve degrees of truth is presented and discussed. Some recent works studying these in the (...) particular cases of Łukasiewicz’s many-valued logics and of logics associated with varieties of residuated lattices are also presented. Finally the extension of this paradigm to other, more general situations is discussed, highlighting the need for philosophical or applied motivations in the selection of the truth degrees, due both to the interpretation of the idea of truth degree and to some mathematical difficulties. (shrink)

Two-dimensional semantics is a framework that helps us better understand some of the most fundamental issues in philosophy: those having to do with the relationship between the meaning of words, the way the world is, and our knowledge of the meaning of words. This selection of new essays by some of the world's leading authorities in this field sheds fresh light both on foundational issues regarding two-dimensional semantics and on its specific applications. Contributors: Richard Breheny, Alex Byrne, David Chalmers, Martin (...) Davies, Gareth Evans, Manuel Garcia-Carpintero, Josep Maci`, Martine Nida-Rumelin, Christopher Peacocke, James Pryor, Francois Recanati, Scott Soames, Cara Spencer, Robert Stalnaker, Kai-Yee Wong, Stephen Yablo. (shrink)

In this enlightening exploration of our nearest primate relatives, Michael Tomasello and Josep Call address the current state of our knowledge about the cognitive skills of non-human primates and integrate empirical findings from the beginning of the century to the present.

The inference systems proposed for solving SAT are unsound for solving MaxSAT and MinSAT, because they preserve satisfiability but not the minimum and maximum number of clauses that can be falsified, respectively. To address this problem, we first define a clause tableau calculus for MaxSAT and prove its soundness and completeness. We then define a clause tableau calculus for MinSAT and also prove its soundness and completeness. Finally, we define a complete clause tableau calculus for solving both MaxSAT and MinSAT, (...) in that the minimum number of generated empty clauses provides an optimal MaxSAT solution and the maximum number provides an optimal MinSAT solution. (shrink)

Chimpanzees follow the gaze of conspecifics and humans — follow it past distractors and behind barriers, ‘check back’ with humans when gaze following does not yield interesting sights, use gestures appropriately depending on the visual access of their recipient, and select different pieces of food depending on whether their competitor has visual access to them. Taken together, these findings make a strong case for the hypothesis that chimpanzees have some understanding of what other individuals can and cannot see. However, chimpanzees (...) do not seem nearly so skillful in the Gesture Choice and Object Choice experimental paradigms. Neither behavioral conditioning nor theory of mind explanations can account for these results satisfactorily. Instead this chapter proposes the idea that chimpanzees have the cognitive skills to recall, represent, categorize, and reason about the behavior and perception of others, but not their intentional or mental states, because they do not know that others have such states since they cannot make a link to their own. Human beings began their own evolutionary trajectory with these same skills, but then at some point in their evolution (probably quite recently) they began to understand that their own experience could serve as some kind of model for that of other persons. This allowed for even better prediction and control of the behavior of others and better communication and cooperation with them as well, and so it was an adaptation with immediate adaptive consequences that ensured its survival. (shrink)

In Naming and Necessity Saul Kripke offers a number of arguments in order to show that no descriptivist theory of proper names is correct. We present here a certain version of descriptivist theory -we will characterize it as an individual-use reference-fixing descriptivist theory that appeals to descriptions regarding how a name is used by other speakers. This kind of theory can successfully answer all the objections Kripke puts forward in Naming and Necessity. Such sort of descriptivist theory is furthermore compatible (...) with the picture about reference that Kripke presents. It also seems to be able to account for some phenomena that are difficult to explain on Kripke’s view (the existence of informative identity statements and true negative singular existential statements). (shrink)

Dirac's approach to gauge symmetries is discussed. We follow closely the steps that led him from his conjecture concerning the generators of gauge transformations {\it at a given time} ---to be contrasted with the common view of gauge transformations as maps from solutions of the equations of motion into other solutions--- to his decision to artificially modify the dynamics, substituting the extended Hamiltonian for the total Hamiltonian. We show in detail that Dirac's analysis was incomplete and, in completing it, we (...) prove that the fulfilment of Dirac's conjecture ---in the ``non-pathological" cases--- does not imply any need to modify the dynamics. We give a couple of simple but significant examples. (shrink)

This article examines the relevance of a theory of the multinational state for the evaluation of claims for self-determination and secession. Considerations of ?ethnocultural justice? imply that the recognition of the multinational character of a state ? or the granting of some of the minority nations' demands ? is a matter of justice. If these requirements are not met, secession could be justified. Indeed, if secession needs a just cause (as it has been argued), a failure to build a truly (...) multinational arrangement can be a valid reason for a minority nation to secede. An approach like the one proposed would also contribute to the resolution of some of the key problems of the three main theories of secession and their appeals to nationalism, choice and remedial rights. (shrink)

Daniel Bensaïd was a Marxist philosopher and author of an extensive body of works about political strategy. His writings combine a diversity of singular influences, such as Marx, Lenin, Trotsky and Che Guevara on the one hand, and Benjamin, Péguy and Blanqui on the other. In his work, religious heresies, Marranos, moles and emblematic figures of the resistance to oppression such as Joan of Arc meet with the classic figures of Marxism. The non-linear concept of time and messianic reason support (...) a strategic reading of history and an understanding of political commitment, following Goldmann’s interpretation of Pascal’s Wager as a wager of uncertain outcome. (shrink)

The last years of the 20th Century have been somewhat contradictory with respect to values like loyalty, trust or truthfulness. On the one hand, (often implicitly, but sometimes very explicitly), self-interest narrowly defined seems to be the dominant force in the business world, both in theory and in practice. On the other hand, alliances, networks and other forms of cooperation have shown that self-interest has to be at least "enlightened".The academic literature has reflected both points of view, but frequently in (...) an ambiguous way, since the concepts of loyalty and trust are somewhat elusive and equivocal. This paper attempts to analyze the concept of loyalty in depth, examining the different conceptions about the word that can be found in the literature. We begin by going to the management classics (specifically, Follett, Barnard and Simon), and we then turn to the anthropological approach of Pérez López (1993), with its built-in ethical analysis, and show how trust and loyalty are crucial to the development of organizations. We end by suggesting in what ways loyalty and trust can be created and fostered in organizations. (shrink)

Afrontamos un tema tan particular como el propuesto desde una perspectiva historicista con la voluntad de insertar aquello que podríamos simplemente observar dentro de los textos en una corriente que iría más allá de la mera sincronía o el apunte estético. Pensamos, por lo tanto, que un acercamiento diacrónico a la obra puede poner de relieve un sentido más luminoso y completo. Sería, en este sentido, una corriente evidentemente más ancha y difusa que desembocaría en la posibilidad de crear una (...) obra cuyas características no afloran arbitrariamente, sino que constituyen el producto provisional de un proceso aún activo. Partimos de un hecho evidente: las ciudades han sufrido a lo largo de los últimos doscientos años un proceso de cambio sin precedentes. Sobre esa base, situaremos a Gil de Biedma, voz surgida en una ciudad –conviene recordarlo– cuya vocación europea es para bien y para mal única en España, en una cima virtual sobre cuyas faldas y en diferentes cotas iremos situando distintos textos, ideas diversas. Digo textos y no autores a sabiendas y refiriéndome siempre al estrecho territorio que respecta a la ciudad. (shrink)

We can distinguish different senses in which a formal language can be said to have been provided with an interpretation. We focus on two: (i) We provide a model (or structure) and a definition of satisfaction and truth in the standard way (ii) We provide a translation into a natural language. We argue that the sentences of a formal language interpreted as in (i) do not have meaning. A formal language interpreted as in (i) models the way the truth of (...) a sentence would be affected by two factors: the interpretation as in (ii) of the language, and a way the world might be. Viewing in this way the relation between interpreting a formal language as in (i) and as in (ii) allows us to justify the conceptual adequacy of the standard model-theoretic definitions of the properties of logical truth and logical consequence. (shrink)

Resumen Mediante una metodología básicamente histórico-prosopográfica, se establece el decurso y el carácter de las actuaciones sinodales que, en el año 343, acontecieron en Sárdica, tomando asimismo en consideración las previas intervenciones episcopales e imperiales que las suscitaron. Favorecido por la fragmentación político-eclesiástica existente, el antagonismo entre los defensores y los contrarios de la superior instancia romana queda evidenciado tanto en las causas personales como en las cuestiones doctrinales, siendo al respecto significativos los argumentos y documentos aducidos o generados por (...) unos y otros, cuyo análisis permite un mejor conocimiento de este relevante capítulo de la historia eclesiástica. (shrink)

El control efectivo de la calidad y seguridad de los ali­mentos requiere de métodos analíticos que garanticen la deter­minación fiable de cualquier sustancia potencialmente perjudicial para el consumidor que pueda estar presente en el alimento antes de su distribución y comercialización. Una de las aproximaciones analíticas que contribuye a garantizar este objetivo engloba una serie de técnicas que tienen en común la utilización de anticuerpos como elementos esenciales para la detección del analito diana, y que en conjunto reciben el nombre (...) de métodos inmunoquímicos. Este artículo pretender aportar una visión básica de los principios bioquímicos subyacentes a estas tecnologías y cuáles son sus venta­jas y limitaciones en la determinación de contaminantes químicos, residuos y aditivos en matrices alimentarias. En la última parte se comentan algunas de nuestras iniciativas en este ámbito que han dado lugar a kits rápidos disponibles comercialmente tras haber transferido la tecnología correspondiente al sector industrial. (shrink)

The global environmental and social-economic crises of industrialized agriculture have led to the emergence of agroecology as an alternative approach aiming to increase the ecological, social and economic sustainability of agri–food systems. The ‘multi-level perspective’ is now a widely used framework to understand and promote the upscaling of local innovation niches, such as agroecology, to broader scales (e.g., regional, national, international), thus reconfiguring the dominant socio-technical regimes. Additionally, emergent ‘hybrid forums’ can provide a space between niche and regime where niche (...) innovators can become important actors in scaling up and out emergent innovations. In this paper, we examine a university training program (Postgraduate Diploma in Local Agroecological Dynamization at the Universitat Autònoma de Barcelona), to better understand its role as a ‘hybrid forum’. Our analysis focuses especially on how the program, as an example of a hybrid forum, worked to reconfigure practices, concepts, and tools of local development practitioners. We also assess to what extent the program contributed to transitioning local development institutions toward agroecology. An online survey (n = 46) and in-depth interviews (n = 16) were carried out to determine how the training program has impacted the student’s opinions and their respective institutions. The results show that most of the students consider that they have acquired new theoretical frameworks and useful methods to re-framing their local development projects, that new alliances with multi-actor networks have been perceived, and that some internal changes of the local development practices have taken place. We conclude that the training program, as a hybrid forum, is capable of outscaling niche innovations through linkages with different kind of actors both from the niche and the regime. Political changes in the socio-technical landscape level offer an opportunity to amplify the impact of the innovations which are being generated by those multi-actor networks, but with a limited multi-level impact as far as institutional regime-actors not aligned with agroecological transition keep the most of the competencies on agri–food systems. (shrink)

In this paper two deductive systems associated with relevance logic are studied from an algebraic point of view. One is defined by the familiar, Hilbert-style, formalization of R; the other one is a weak version of it, called WR, which appears as the semantic entailment of the Meyer-Routley-Fine semantics, and which has already been suggested by Wójcicki for other reasons. This weaker consequence is first defined indirectly, using R, but we prove that the first one turns out to be an (...) axiomatic extension of WR. Moreover we provide WR with a natural Gentzen calculus. It is proved that both deductive systems have the same associated class of algebras but different classes of models on these algebras. The notion of model used here is an abstract logic, that is, a closure operator on an abstract algebra; the abstract logics obtained in the case of WR are also the models, in a natural sense, of the given Gentzen calculus. (shrink)

A pair of deductive systems (S,S’) is Leibniz-linked when S’ is an extension of S and on every algebra there is a map sending each filter of S to a filter of S’ with the same Leibniz congruence. We study this generalization to arbitrary deductive systems of the notion of the strong version of a protoalgebraic deductive system, studied in earlier papers, and of some results recently found for particular non-protoalgebraic deductive systems. The necessary examples and counterexamples found in the (...) literature are described. (shrink)

Moran’s conception of self-knowledge, in his book Authority and Estrangement, is connected to an extremely rationalistic conception of intentional action. I will argue that this rationalistic commitment can be avoided without renouncing the most basic aspects in his account of self-knowledge.

This paper reviews the impact of Rasiowa's well-known book on the evolution of algebraic logic during the last thirty or forty years. It starts with some comments on the importance and influence of this book, highlighting some of the reasons for this influence, and some of its key points, mathematically speaking, concerning the general theory of algebraic logic, a theory nowadays called Abstract Algebraic Logic. Then, a consideration of the diverse ways in which these key points can be generalized allows (...) us to survey some issues in the development of the field in the last twenty to thirty years. The last part of the paper reviews some recent lines of research that in some way transcend Rasiowa's approach. I hope in this way to give the reader a general view of Rasiowa's key position in the evolution of Algebraic Logic during the twentieth century. (shrink)

There are many theories about organizations that are mutually inconsistent with each other, which explain phenomena to very similar extents. Most of them ignore the ethical dimension completely. In this paper I put forth the basic principles for a theory of decision-making in organizations, which integrates ethics in the core of the theory. It is based on the work of Juan Antonio Pérez López [1991, Teoría de la Acción humana en las organizaciones (Ediciones Rialp, Madrid), 1993, Fundamentos de la Dirección (...) de Empresas (Ediciones Rialp, Madrid)] and is essentially a humanistic view of the interrelationships between people and its implications for organizational decision-making. I will first show that in any relationship between two people, the learning of the two is crucial for such a relationship to last; and then I will expand on the different aspects of that learning. This analysis will then be applied to the organizational context as a basis for organizational decision-making, Second, it applies the previous analysis to the organizational context as a basis for organizational decision making, showing how any decision in an organization needs to be analyzed on the basis of three criteria (short-run effectiveness, development of distinctive competence, and unity and identification with the organization) and how ethics is included in the last two. (shrink)