We obtain in this paper a representation of the formulae of extensions ofL by generalized quantifiers through functors between categories of first-order structures and partial isomorphisms. The main tool in the proofs is the back-and-forth technique. As a corollary we obtain the Caicedo's version of Fraïssés theorem characterizing elementary equivalence for such languages. We also discuss informally some geometrical interpretations of our results.

Ají jalapeño (Capsicum annuum L.) encurtido fue secado en aire caliente a 70°C, 50°C, y 35°C, y en cámara de refrigeración no frost (10°C); hallándose las curvas de cinética de secado, el tiempo de secado (19 h a 744 h), alta correlación entre tasa de humedad y tiempo de secado y entre temperatura y tiempo de secado; la difusividad efectiva (6.59E-11 m2.s-1 a 1.2176E-9 m2.s-1), la energía de activación (39.90 kJ/mol), los sólidos solubles, el pH, y la retención de vitamina (...) C de 133% a 10°C pero perdiéndose al menos el 50% de vitamina C al secar con aire caliente. (shrink)

A representation is a remnant of previous experience that allows that experience to affect later behavior. This paper develops a metatheoretical view of representation and applies it to issues concerning representation in animals. To describe a representational system one must specify the following: thedomainor range of situations in the represented world to which the system applies; thecontentor set of features encoded and preserved by the system; thecodeor transformational rules relating features of the representation to the corresponding features of the represented (...) world; themedium, or the representation's physical instantiation; and thedynamics, or how the system changes with time. In part because of the behaviorist assumption that the hypothetical, covert changes occurring in an organism during learning correspond to the overt physical changes that are observed, issues of representation in animal behavior have been largely ignored as irrelevant or misleading. However, it can be inferred that representations, acting as models of environmental regularities, operate at many levels of behavioral functioning, both cognitive and noncognitive. Objections to the use of this concept in explanations of animal behavior, based on the claim that it is indeterminate and on behaviorist considerations of parsimony, can be answered. Animal representations may be specialized in terms of tasks and species. Data from tasks involving spatial memory, delayed matching-to-sample, and sequence learning suggest some foundations for a general theory of animal representations. (shrink)

The twelfth century was a period of transmission and absorption of Arabic learning though it filtered outside of the Arabic world as early as the second half of the tenth century. In general, the lure of Spain began to act only in the twelfth century, and the active impulse toward the spread of Arabic mathematics came from beyond the Pyrenees and from men of diverse origins. The chief names are Adelard of Bath, Robert of Chester, Hermann of Carinthia and Gerard (...) of Cremona. In this time the Latin world became acquainted with the Hindu numerals, the Arabic Algebra and Euclid'sElements. However, not only Spain, but also the Norman kingdom of southern Italy and Sicily occupies a position of peculiar importance, though the works of the translators did not become very influential. There were made direct translations from Greek into Latin. One had to wait a century more to obtain a translation from Greek into Latin of the chief Archimedean scientific and mathematical treatises by William of Moerbeke. In the thirteenth century Fibonacci and Jordanus Nemorarius stand at the threshold of European mathematics. Not only was Fibonacci the first to explain Arabic arithmetic, but his works, especially his later ones, contain many original ideas. Jordanus continued the Greco-Roman tradition rather than the Greco-Arabic one, but he did so with much independence. To Nicole Oresme (fourteenth century) was due a broadened view of proportionality, a geometric proof to determine the summation of convergent infinite series and the proof, evidently the first in the history of mathematics, that the harmonic series is divergent. The Configuration Doctrine was treated by Merton College authors and by Oresme. In the fifteenth century theDe triangulis omnimodis of Regiomontan, a systematic account of the methods for solving triangles, marked the rebirth of trigonometry. (shrink)

This is a collection of essays on themes of legal philosophy which have all been generated or affected by Hart's work. The topics covered include legal theory, responsibility, and enforcement of morals, with contributions from Ronald Dworkin, Rolf Sartorius, Neil MacCormach, David Lyons, Kent Greenawalt, Michael Moore, Joseph Raz, and C.L. Ten, among others.

This essay evaluates the recent restatement in O’Brien v Chief Constable of South Wales Police of the law on similar facts in civil proceedings. The two-stage approach propounded in O’Brien contains a number of conceptual problems. Apparent simplicity was achieved by avoiding fundamental issues underlying this area. Prior to the Criminal Justice Act 2003, judges recognized that the common law similar facts rule had a role to play in both civil and criminal trials; but they gave the rule a wider (...) exclusionary scope in criminal than in civil cases. Adoption of a moral perspective helps to explain this state of affairs. The rule, so it will be argued, protects the legitimacy of trial deliberation by forbidding reliance on an assumption that disrespects the moral autonomy of the person whose conduct is being judged. This moral objection can arise in civil cases; but it arises more frequently and usually with greater force in criminal proceedings. Hence, while there is a need to reserve some judicial power to disallow proof of similar incidents in the civil context, there is usually less reason for the exercise of that power in civil cases than at criminal trials. (shrink)

This classic collection of essays, first published in 1968, represents H.L.A. Hart's landmark contribution to the philosophy of criminal responsibility and punishment. Unavailable for ten years, this new edition reproduces the original text, adding a new critical introduction by John Gardner, a leading contemporary criminal law theorist.

Love's memories, love recalling itself in letters lost and found over an interval of forty years: Cixous's writer-narrator advances here far into a labyrinth of passions long ago delivered and yet still arriving through the mail, through letters and literature, in other words, the poetry of the post. As for the lovers' returning scenes, they have their addresses in Paris and in New York, but also in a lost oasis of the Egyptian desert during the Napoleonic wars, in Athens and (...) along the shores of a great lake centuries ago in the country of myth. The lovers are poets or soldiers, philosophers or students madly in love with poetry and poets. They are as well mermaids or panthers. Panthers? Yes, for it is the passion of the animal that drives all these lovers to bare themselves, and sometimes their claws, before the beloved. Misunderstandings are often, even inevitably the result. Seconded and witnessed by her passionate, truth-telling cats, Cixous's narrator-writer returns unerringly to moments of errancy inflicted on address and language, those errors and faults when love, perhaps, is listening only to itself, without subject or object, lover or beloved, just love itself, l'amour meme, l'amour m'aime, love loving me, in the letter box of memory. (shrink)