Market inefficiency is a latent concept, and it is difficult to be measured by means of a single indicator. In this paper, following both the adaptive market hypothesis and the fractal market hypothesis, we develop a new time-varying measure of stock market inefficiency. The proposed measure, called composite efficiency index, is estimated as the synthesis of the most common efficiency measures such as the returns’ autocorrelation, liquidity, volatility, and a new measure based on the Hurst exponent, called the Hurst efficiency (...) index. To empirically validate the indicator, we compare different European stock markets in terms of efficiency over time. (shrink)

This work evaluated the structure of dreams in people affected by schizophrenia. The verbal reports of 123 schizophrenic patients were compared with 123 dream reports from a control group. In accordance with the Jungian conceptualization of, dreams as texts, dream reports were assessed using textual analysis processing techniques.Significant differences were found in textual parameters, showing that the dreams reports of schizophrenic patients differ from those of the control group. It is thus possible that schizophrenia probably underlies changes in the oneiric (...) production and dream reports. This work confirms the value of textual analysis in the study of oneiric material. (shrink)

BackgroundData processing of health research databases often requires a Data Protection Impact Assessment to evaluate the severity of the risk and the appropriateness of measures taken to comply with the European Union General Data Protection Regulation. We aimed to define and apply a comprehensive method for the evaluation of privacy, data governance and ethics among research networks involved in the EU Project Bridge Health.MethodsComputerised survey among associated partners of main EU Consortia, using a targeted instrument designed by the principal investigator (...) and progressively refined in collaboration with an international advisory panel. Descriptive measures using the percentage of adoption of privacy, data governance and ethical principles as main endpoints were used for the analysis and interpretation of the results.ResultsA total of 15 centres provided relevant information on the processing of sensitive data from 10 European countries. Major areas of concern were noted for: data linkage, access and accuracy of personal data and anonymisation procedures. A high variability was noted in the application of privacy principles.ConclusionsA comprehensive methodology of Privacy and Ethics Impact and Performance Assessment was successfully applied at international level. The method can help implementing the GDPR and expanding the scope of Data Protection Impact Assessment, so that the public benefit of the secondary use of health data could be well balanced with the respect of personal privacy. (shrink)

Despite that it is commonly accepted that migraine is a disorder of the nervous system with a prominent genetic basis, it is comorbid with a plethora of medical conditions. Several studies have found bidirectional comorbidity between migraine and different disorders including neurological, psychiatric, cardio- and cerebrovascular, gastrointestinal, metaboloendocrine, and immunological conditions. Each of these has its own genetic load and shares some common characteristics with migraine. The bidirectional mechanisms that are likely to underlie this extensive comorbidity between migraine and other (...) diseases are manifold. Comorbid pathologies can induce and promote thalamocortical network dysexcitability, multi-organ transient or persistent pro-inflammatory state, and disproportionate energetic needs in a variable combination, which in turn may be causative mechanisms of the activation of an ample defensive system with includes the trigeminovascular system in conjunction with the neuroendocrine hypothalamic system. This strategy is designed to maintain brain homeostasis by regulating homeostatic needs, such as normal subcortico-cortical excitability, energy balance, osmoregulation, and emotional response. In this light, the treatment of migraine should always involves a multidisciplinary approach, aimed at identifying and, if necessary, eliminating possible risk and comorbidity factors. (shrink)

This handbook offers a deep analysis of the main forms of legal reasoning and argumentation from both a logical-philosophical and legal perspective. These forms are covered in an exhaustive and critical fashion, and the handbook accordingly divides in three parts: the first one introduces and discusses the basic concepts of practical reasoning. The second one discusses the main general forms of reasoning and argumentation relevant for legal discourse. The third one looks at their application in law as well as at (...) the different areas of legal reasoning. The handbook’s division in three parts reflects its conceptual architecture, since legal reasoning and argumentation are considered in relation to the more general types of reasoning. (shrink)

The theology of Pier Damiani († 1072) is still an understudied theme in his scholarship, in particular, for what it concerns his Trinitarian and Christological doctrines. The aim of this study is to reconstruct and discuss especially Damiani’s Christological views as formulated in Letter 81, better known as his De fide catholica. It is argued that Damiani’s approach is mostly exegetical, as he mainly points to and comments on Biblical passages in support of Catholic doctrines. Still, he assumes a peculiar (...) method of investigation, as he devotes the main body of the Letter to the question of the correct understanding (recta intelligentia) of the Catholic interpretation of Christology, and reserves only the final summary to a discussion of Biblical authorities. Eventually, it is argued that despite Damiani’s attempts at clarifying the matter, he acknowledges an inherent difficulty in explaining how it is possible that God became man without truly assuming the person of man, and, if He did so, how this did not give rise to two, however indistinct, persons or hypostases. The concept of ‘co-union’ of human and divine natures, introduced by Damiani, makes the simultaneous unity and distinction of the two natures intuitively clear, but it remains a concept that is not clarified in all its details and implications. (shrink)

In this essay, we reconsider two themes particularly discussed by the interpreters of Ockham: that of divine omnipotence and the hypothesis of the intuitive cognition of non-existent things. The purpose is to show that the hypothetical case considered by Ockham was subjected to opposite interpretations. For theological reasons, Ockham attributes not only to God but also to human beings the possibility of having acts of intuitive cognition of things that do not exist; nonetheless, he holds that it is contradictory for (...) God to give us the evident cognition of things that appear to be present when they are actually absent. Walter Chatton opposes this conclusion, arguing that no contradiction ensues from that hypothesis. Instead, he believes that it is impossible for God to give us the intuition of things that absolutely do not exist or are in no way present to us. Ockham’s arguments include some difficulties that Chatton acutely sees and discusses. In particular, Chatton calls into question Ockham’s missed distinction between the existence and the presence of the intuited thing. (shrink)

Truth is a key notion in Ockham’s philosophical reductionist program, a notion that has been the object of contrasting interpretations in scholarship. My interpretation is that, for Ockham, ‘being true’ expresses an epistemological relation, namely the one through which our mind reflects on a proposition of language, compares it with an extra-mental state of affairs, and thus ascertains their correspondence. Placing truth at a point of intersection of language with mind and reality, Ockham’s interpretation of Aristotle’s characterization of philosophy as (...) the science of truth comes to be innovative. For Ockham, philosophy is a meticulous training of interpretation of language in order to account correctly for the truth-value of propositions. (shrink)

Nella relazione presentata al II Convegno dell'Associazione di Studi Tardoantichi, Riccardo Maisano osservava che solo con l'edizione di Grosdidier de Matons, apparsa tra il 1964 e il 1981, «ha inizio il vero e proprio dialogo fra l'opera di Romano e il pubblico occidentale. Per la prima volta gli inni sono sistematicamente tradotti, introdotti e annotati dallo stesso filologo curatore dell'edizione critica, e la medesima unità di intenti guida anche la compilazione dell'apparato delle varianti, rendendo al lettore un servigio inestimabile». Ma (...) poiché la prematura scomparsa dello studioso, al quale Maisano riconosce «appassionata adesione alla materia» e «signorile onestà intellettuale» (I, p. 75), impedì che l'opera venisse portata a termine, la presente risulta essere la prima edizione criticamente rivista, tradotta e commentata in modo completo: oltre ai 59 contaci di sicura attribuzione, essa comprende in appendice anche alcuni carmina dubia (83, 84, 87 Maas-Trypanis), nonché l'Inno acatisto, che sicuramente non può essere assegnato al Melodo (II, p. 580), ma del quale è ristampata la traduzione di Carlo Del Grande (Firenze 1948), proprio per documentare «la differenza anche stilistica fra questo componimento e i cantici di Romano» (II, p. 581). (shrink)

Raccolta di saggi sulla storia della filosofia rinascimentale e moderna.

Raccolta di saggi dedicati al Prof. Franco De Capitani.

“Acme” è arrivata al suo settantacinquesimo anno.

Fra gli arredi marmorei di età romana si distingue un gruppo di sostegni realizzati in marmo Giallo antico, che presentano caratteristiche comuni di lavorazione e di decorazione, i cui esemplari sono stati ritrovati nel Mediterraneo occidentale (Sardegna, Francia meridionale, Spagna), con una concentrazione in alcuni centri antichi. Si propongono considerazioni su produzione, circolazione e riuso di questi oggetti di lusso.

Raccolta di saggi dedicati al Prof. Franco De Capitani.

Raccolta di saggi sulla storia della filosofia rinascimentale e moderna.

L'ampio e documentato studio di Ingela Nilsson conferma l'interesse sempre crescente per i romanzi bizantini, ribadito anche dalla ricca mise au point che Agapitos ha riservato di recente alle opere della Komnenenzeit, tra le quali Ismine e Isminia di Eumazio Macrembolita – la Nilsson accetta questa forma del nome (p. 18), condividendo l'ipotesi di Hunger, che identifica l'autore con il dignitario imperiale che fu per due volte eparchos di Costantinopoli e protoasekretis durante la sinodo del 1166 – costituisce l'unico testo (...) in prosa, solo da poco, per una felice coincidenza, riedito criticamente da M. Marcovich (Teubner, Stutgardiae et Lipsiae 2001). (shrink)

In literature Peter Damian has been often presented as an anti-dialectic thinker. Over time this statement has been subjected to careful historiographical revision. Today it is commonly accepted that the distinction between dialectic and anti-dialectic thinkers only partially describes the state of philosophy in the eleventh century. In fact, the relation between faith and reason is complex in Damian. The purpose of this paper is to reconsider this relation in the light of the significance Damian attributes to the notion of (...) contradiction. Reason must respect the principle of non-contradiction not only when it describes the natural world, but also when it explores the dimension of the mysteries of faith. (shrink)

The aim of this study is to illustrate the role played by Augustine’s Commentary on the Genesis in the writings of Thomas Aquinas. This work is of great importance for Aquinas, not only because it is the work where Augustine clarifies his interpretation of creation, but also because creation is, among the theological topics, perhaps the most philosophical, insofar as it gives the opportunity of elaborating on many philosophical issues. In particular, the goal of the study is to rethink the (...) positions of Aquinas and Augustine on one of these issues, that is the relationship between soul and body. I mean to call into question two historiographical theses: first, that Augustine and Aquinas formulate positions that are irreconcilable with each other, and second, that they in no way address that which we today call the Mind-Body Problem. (shrink)

In this study I aim at providing a new assessment of Ockham’s proof for God’s existence. After reconstructing Ockham’s views of the relationship between philosophy and theology , I move to examining Ockham’s criticism to some traditional arguments , before to scrutinizing closely Ockham’s argument. My main conclusion is that Ockham did not want to elaborate a new proof but to qualify the proof stemming from efficient causality, which he considers the only available way of demonstrating God’s existence.

Il pensatore domenicano Francesco da Prato, attivo nel secondo quarto del XIV sec. tra Perugia, Siena e Firenze, rappresenta una delle prime testimonianze in Italia della ricezione di Ockham e di reazione tomista alla sua logica. Lo studio si articola in due sezioni: nella prima l'A. esamina la dottrina della significazione nelle fonti principali degli scritti di logica di Francesco: Tommaso d'Aquino, Herveus Natalis e Guglielmo di Ockham; nella seconda analizza la posizione di Francesco in scritti trasmessi nei seguenti mss: (...) Firenze, BNC., Conv. Soppr. J.5.31 ; Conv. Soppr. B.3.173 e Roma, Bibl. Angelica 1053. (shrink)

In philosophy of language, a distinction has been proposed by Diego Marconi between two aspects of lexical competence, i.e. referential and inferential competence. The former accounts for the relation-ship of words to the world, the latter for the relationship of words among themselves. The aim of the pa-per is to offer a critical discussion of the kind of formalisms and computational techniques that can be used in Artificial Intelligence to model the two aspects of lexical competence, and of the main (...) difficulties related to the use of these computational techniques. The first conclusion of our discussion is that the dis-tinction between inferential and referential semantics is instantiated in the literature of Artificial Intelli-gence by the distinction between symbolic and connectionist approaches. The second conclusion of our discussion is that the modelling of lexical competence needs the advent of hybrid models integrating symbolic and connectionist frameworks. Our hypothesis is that Conceptual Spaces, a framework devel-oped by Gärdenfors more than fifteen years ago, can offer a lingua franca that allows to unify and gener-alize many aspects of the representational approaches mentioned above and to integrate “inferential” (=symbolic) and “referential” (=connectionist) computational approaches on common ground. (shrink)