Experimental constraints on fluid-rock reactions during incipient serpentinization of harzburgite
Klein, Frieder
2014-10-20
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This paper aims at reconstructing the standards of evaluation of economic theory looking at the images that economists themselves (historically) have had of their own field of enquiry: from empirical apriorism (N.W. Senior, Mill, Cairnes) to Austrian apriorism (Robbins, Von Mises), from Hutchison’s methodological critique of the Neoclassical assumptions to Machlup’s verificationist approach, and up to Milton Friedman’s influential and sui generis pragmatism. By comparing abstract theories of scientific rationality (Philosophy of Science) with the concrete research practice (Economics) the paper provides a more specific case for the general problem of the demarcation between science and pseudoscience ( it further suggests the relative merits of a dynamical approach compared to the Neopositivist or Popperian static one). It is argued tha...
In the last decade the concept of context has been extensively exploited in many research areas, e.g., distributed artificial intelligence, multi agent systems, distributed databases, information integration, cognitive science, and epistemology. Three alternative approaches to the formalization of the notion of context have been proposed: Giunchiglia and Serafini's Multi Language Systems (ML systems), McCarthy's modal logics of contexts, and Gabbay's Labelled Deductive Systems. Previous papers have argued in favor of ML systems with respect to the other approaches. Our aim in this paper is to support these arguments from a theoretical perspective. We provide a very general definition of ML systems, which covers all the ML systems used in the literature, and we develop a proof theory for an important subclass of them: the MR systems. We...
This paper consists of the central part of the research "Migrations and Crime - the international dimension of the problem" commissioned by the Italian Ministry of Justice and carried out under my direction by TRANSCRIME, University of Trento, on behalf of the Centro Nazionale di Prevenzione e Difesa Sociale.
No abstract available
Il tasso di occupazione nei 15 paesi dell'EU negli ultimi due decenni, com'è noto, è molto piu' basso rispetto a quello degli Stati Uniti. Meno noto, forse, è che questa differenza è tutta ascrivibile al tasso di occupazione nei servizi, mentre quello dell'industria (e dell'agricoltura) ci è favorevole. Non solo, ma tra i servizi il tasso di occupazione di quelli finali è rimasto stazionario, mentre soltanto i servizi intermedi hanno mostrato una buona dinamica. Sembrerebbe dunque che buona parte dei servizi non sia stata in grado di interagire con gli altri settori, e in particolare con la manifattura che maggiormente è stata interessata al progresso tecnico, al fine diassorbire occupazione, creare reddito e fornire domanda. La dimensione di questi fatti è stata messa a fuoco solo di recente, ma lo studio delle cause e dei rimedi è an...
Texture analysis based on the extraction of contrast features is very effective in terms of both computational complexity and discrimination capability. In this framework, max-min approaches have been proposed in the past as a simple and powerful tool to characterize a statistical texture. In the present work, a method is proposed that allows exploiting the potential of max -min approaches to efficiently solve the problem of detecting local alterations in a uniform statistical texture. Experimental results show a high defect discrimination capability and a good attitude to real-time applications, which make it particularly attractive for the development of industrial visual inspection systems.
Questo saggio si propone di analizzare un problema di importanza crescente nella comunità internazionale, e cioè il rapporto che intercorre tra il processo di globalizzazione che sta investendo la nostra società e la criminalità organizzata transnazionale. La criminalità organizzata transnazionale si avvale di tutte le opportunità offerte dalla globalizzazione dei mercati e dalle nuove tecnologie di comunicazione e di gestione dell’informazione. La natura internazionale dell’attività di riciclaggio dei proventi di provenienza illecita, ad esempio, conferma che proprio questa attività criminale potrebbe risultare maggiormente avvantaggiata e rivoluzionata dallo sviluppo della tecnologia informatica e di comunicazione.
Research on how money affects economic activity has revived interest in the so-called "credit view". In this paper we focus on current developments in the credit view in order to assess the results of the past decade's research and its legacy for macroeconomics and monetary policy. We expound the main models of the "credit channels" of monetary transmission, drawing a distinction between models of aggregate demand, which are predominant, and models of aggregate supply, which are less developed despite theory suggests a potential connection between credit conditions and firms' production activity. Each approach is accompanied by a survey of the main empirical results with particular reference to Italy, where bank-firm relations are traditionally regarded as particularly important.
Tropos is a novel agent-oriented software development methodology founded on two key features: (i) the notions of agent, goal, plan and various other knowledge level concepts are fundamental primitives used uniformly throughout the software development process; and (ii) a crucial role is assigned to requirements analysis and specification when the system-to-be is analyzed with respect to its intended environment. This paper provides a (first) detailed account of the Tropos methodology. In particular, we describe the basic concepts on which Tropos is founded and the types of models one builds out of them. We also specify the analysis process through which design flows from external to system actors through a goal analysis and delegation. In addition, we provide an abstract syntax for Tropos diagrams and other linguistic constructs.
A circuit decomposition of a graph G=(V,E) is a partition of E into circuits. A decomposition is said even if all its circuits have even length. We give a negative answer to a question posed by Jackson asking whether K_5 is the only 4-connected eulerian graph with an even number of edges but no even circuit decomposition.
