3,854 research outputs found

    Italy, the Monti government and the euro crisis (2011-12)

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    Hailed initially as the country’s saviour for saving Italy from default, Mario Monti’s technocratic government (2011-13) ended in controversy and with its achievements questioned. Aware of this contested legacy, this article seeks to revisit Monti’s term in office and to assess his approach to the crisis that engulfed Italy and the eurozone in 2011-12. In doing so, it looks primarily at Monti’s European policy, but also briefly examines his domestic agenda. Monti’s legacy has so far drawn very limited academic interest. By filling a gap in the existing literature on contemporary European and Italian affairs, this article aims to improve our understanding of a critical phase in the recent politics and foreign policy of one the key EU member states

    Are credit ratings effective on a momentum investment strategy? An empirical study

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    This dissertation investigates the existence of momentum effect for stocks differentiated by their credit rating, provided by S&P in a sample of 23790 listed companies from the US Market between 1987 and 2017. I analyse two types of credit rating categories, Investment grade and Speculative grade. The average credit ratings form an inverted U-shape across the various momentum portfolios, suggesting that a momentum strategy of buying previous winners and selling previous losers essentially takes long and short positions in firms with the lowest credit risk respectively.Esta dissertação investiga a existência de efeito momentum para ações diferenciadas por sua classificação de crédito, fornecida pela S&P em uma amostra de 23790 empresas listadas no Mercado dos EUA entre 1987 e 2017. Analiso dois tipos de categorias de classificação de crédito, grau de investimento e grau especulativo. As classificações de crédito médias formam uma forma inversa em U nas várias carteiras de momentum, sugerindo que uma estratégia de momentum de comprar vencedores anteriores e vender perdedores anteriores essencialmente leva posições longas e curtas em empresas com o menor risco de crédito, respectivamente

    Frustrating the Americans and Befriending the Communists: Nehru’s Policy in the Early Asian Cold War, 1947–1954

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    The years 1900 to 1954 marked the transformation from an exotic, colonized "Far East" to a more autonomous, prominent "Asia Pacific". This anthology examines the grand strategies of great powers as they vied for influence and ultimately hegemony in the region. At the turn of the twentieth century, the main contestants included the venerable British Empire and the aspiring Japan and United States. The unwieldy leviathan of China, the European imperial holdings in Southeast Asia, and the expanses of the western Pacific emerged as battlegrounds in literal and geopolitical terms. Other less powerful nations, such as India, Burma, Australia, and French Indochina, also exercised agency in crafting grand strategies to further their interests and in their interactions with those great powers. Among the many factors affecting all nations invested in the Asia Pacific were such traditional elements as economics, military power, and diplomacy, as well as fluid traits like ideology, culture, and personality. The era saw the decline of British and European influence in the Asia Pacific, the rise and fall of Japanese imperialism, the emergence of American primacy, the ongoing struggle for independence in Southeast Asia, and China’s resurrection as a contender for hegemony. Great powers shifted and so too did their grand strategies

    An Approach to Assess the Impact of Tutorials in Video Games

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    Video games are an established medium that provides interactive entertainment beyond pure enjoyment in many contexts. Game designers create dedicated tutorials to teach players the game mechanisms and rules, such as the conventions for interaction, control schemes, core game mechanics, etc. While effective tutorial design is considered a crucial aspect to support this learning process, the existing literature approaches focus on designing ad hoc tutorials for specific game genres rather than investigating the impact of different tutorial styles on game learnability and player engagement. In this paper, we tackle this challenge by presenting a general-purpose approach aimed at supporting game designers in the identification of the most suitable tutorial style for a specific genre of video games. The approach is evaluated in the context of a simple first-person shooter (FPS) mainstream video game built by the authors through a controlled comparative user experiment involving 46 players

    Comments on the non-conformal gauge theories dual to Ypq manifolds

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    We study the infrared behavior of the entire class of Y(p,q) quiver gauge theories. The dimer technology is exploited to discuss the duality cascades and support the general belief about a runaway behavior for the whole family. We argue that a baryonic classically flat direction is pushed to infinity by the appearance of ADS-like terms in the effective superpotential. We also study in some examples the IR regime for the L(a,b,c) class showing that the same situation might be reproduced in this more general case as well.Comment: 48 pages, 27 figures; updated reference

    PALEOBIOLOGY FROM MUSEUM COLLECTIONS: COMPARING HISTORICAL AND NOVEL DATA ON UPPER MIOCENE MOLLUSCS OF THE LIVORNO HILLS

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    The upper Miocene mollusc collection from Monti Livornesi, Italy, collected more than a century ago, is confronted with new collections coming from the same localities of Popogna and Quarata. The study concerns the comparison of abundance data of three distinct fossil assemblages from the three vertically-stacked stratigraphic units called Luppiano, Rosignano and Raquese, of upper Tortonian-early Messinian age. Literature and museological data allowed to attribute most museum specimens to one and only one fossil assemblage. Museum collections preserve roughly the same dominant species, with similar ranks as the new quantitative field collections. Significant differences are however evident in the Luppiano assemblage from brackish-water, shallow subtidal bottoms, because new samples yield many species of small size, some of which with high dominance, that are completely lacking in museum collections, suggesting a bias due to size sorting and hinting at the overwhelming contribution of small-sized species to global mollusc diversity. On the other hand the Raquese assemblage, from an open marine shelf setting, can be similarly interpreted from the study of either the museum of new collection, yielding a similar species list and rank. The Rosignano mollusc assemblage, from a bioclastic bottom near a coral patch reef and characterised by fossils with a distinct taphonomic signature, is insufficiently represented in both historical and new collections. The systematics of the three assemblages are revised. The study contributes to the growing literature on museum “dark data” by showing that museum collections may yield abundance data significant for paleobiological analysis

    Effect of Quebracho tannin extract on soybean and linseed oil biohydrogenation by solid associated bacteria: an in vitro study

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    An in vitro trial was carried out to study the effects of Quebracho tannins extract (QE) on fatty acid profile of rumen solid adherent bac- teria (SAB) during the fermentation of diets supplemented with soybean or linseed oil, as sources of linoleic (LA; 18:2 n-6) and α- linolenic acid (α-LNA; 18:3 n-3), respectively. Two control diets were prepared using a basal mixture of grass hay [760 g/kg on dry matter (DM)], soybean meal (55 g/kg DM), barley meal (130 g/kg DM), vitamin mineral premix (20 g/kg DM) and 35 g/kg DM of soybean (SOC diet) or linseed oil (LOC diet) as lipid supple- ment. Other two diets (SOCT and LOCT) were obtained by integrating SOC and LOC with QE (49 g/kg DM). The results confirmed that Quebracho tannins may be an effective method for reducing in SAB the biohydrogena- tion of LA (17.3 vs 34.5 g/100 g of fatty acid in SOC and SOCT, respectively) and LNA (10.7 vs 21.4 g/100 g of fatty acid in LOC and LOCT, respectively), but not for increasing the rumen accumulation of cis9, trans11 18:2 (0.77 vs 0.32 g/100 g of fatty acid in SOC and SOCT, respec- tively; 0.51 vs 0.43 g/100 g of fatty acid in LOC and LOCT, respectively) and trans11 18:1 (6.15 vs 3.64 g/100 g of fatty acid in SOC and SOCT, respectively; 5.53 vs 4.47 g/100 g of fatty acid in LOC and LOCT, respectively)

    A Reference Data Model to Specify Event Logs for Big Data Pipeline Discovery

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    State-of-the-art approaches for managing Big Data pipelines assume their anatomy is known by design and expressed through ad-hoc Domain-Specific Languages (DSLs), with insufficient knowledge of the dark data involved in the pipeline execution. Dark data is data that organizations acquire during regular business activities but is not used to derive insights or for decision-making. The recent literature on Big Data processing agrees that a new breed of Big Data pipeline discovery (BDPD) solutions can mitigate this issue by solely analyzing the event log that keeps track of pipeline executions over time. Relying on well-established process mining techniques, BDPD can reveal fact-based insights into how data pipelines transpire and access dark data. However, to date, a standard format to specify the concept of Big Data pipeline execution in an event log does not exist, making it challenging to apply process mining to achieve the BDPD task. To address this issue, in this paper we formalize a universally applicable reference data model to conceptualize the core properties and attributes of a data pipeline execution. We provide an implementation of the model as an extension to the XES interchange standard for event logs, demonstrate its practical applicability in a use case involving a data pipeline for managing digital marketing campaigns, and evaluate its effectiveness in uncovering dark data manipulated during several pipeline executions.acceptedVersio

    Determination of alpha_s from scaling violations of truncated moments of structure functions

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    We determine the strong coupling alpha_s(M_Z) from scaling violations of truncated moments of the nonsinglet deep inelastic structure function F_2. Truncated moments are determined from BCDMS and NMC data using a neural network parametrization which retains the full experimental information on errors and correlations. Our method minimizes all sources of theoretical uncertainty and bias which characterize extractions of alpha_s from scaling violations. We obtain alpha_s(M_Z) = 0.124 +0.004-0.007 (exp.) + 0.003- 0.004 (th.).Comment: 24 pages, 4 figures, latex with epsfig; neural network parametrization available from http://sophia.ecm.ub.es/f2neura
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