1,156 research outputs found

    Globalization and Changing Patterns in the International Transmission of Shocks in Financial Markets

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    In this paper we compare various characteristics of the cross-country transmission of shocks in the financial markets of both advanced and emerging countries during two periods of globalization -- the pre-World War I classical gold standard era, 1880-1914, and the post-Bretton Woods era, 1975-2000. Based on principal components analysis on monthly spreads on long-term sovereign bond yields and on an EMP measure of currency crises, an index of global stress, and impulse response functions from VARs estimated using weekly data on short-term interest rates, we conclude that financial market shocks were more globalized before 1914 compared to the present. We postulate that this difference in systemic stability between the two eras of globalization reflects factors such as strong cross-country interdependence fostered through links to gold, the growing financial maturity of advanced countries, and the widening of the center to include a more diverse group of countries spanning several regions.

    A stochastic model of catalytic reaction networks in protocells

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    Protocells are supposed to have played a key role in the self-organizing processes leading to the emergence of life. Existing models either (i) describe protocell architecture and dynamics, given the existence of sets of collectively self-replicating molecules for granted, or (ii) describe the emergence of the aforementioned sets from an ensemble of random molecules in a simple experimental setting (e.g. a closed system or a steady-state flow reactor) that does not properly describe a protocell. In this paper we present a model that goes beyond these limitations by describing the dynamics of sets of replicating molecules within a lipid vesicle. We adopt the simplest possible protocell architecture, by considering a semi-permeable membrane that selects the molecular types that are allowed to enter or exit the protocell and by assuming that the reactions take place in the aqueous phase in the internal compartment. As a first approximation, we ignore the protocell growth and division dynamics. The behavior of catalytic reaction networks is then simulated by means of a stochastic model that accounts for the creation and the extinction of species and reactions. While this is not yet an exhaustive protocell model, it already provides clues regarding some processes that are relevant for understanding the conditions that can enable a population of protocells to undergo evolution and selection.Comment: 20 pages, 5 figure

    Occurrence of target-site resistance to neonicotinoids in the aphid Myzus persicae in Tunisia, and its status on different host plants

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    This is the peer reviewed version of the following article: Kamel Charaabi, Sonia Boukhris-bouhachem, Mohamed Makni, and Ian Denholm, ‘Occurrence of target‐site resistance to neonicotinoids in the aphid Myzus persicae in Tunisia, and its status on different host plants’, Pest Management Science, Vol. 74(6): 1297-1301, June 2018, which has been published in final form athttps://doi.org/10.1002/ps.4833 Under embargo until 19 December 2018. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.BACKGROUND: The R81T mutation conferring target-site resistance to neonicotinoid insecticides in Myzus persicae was first detected in France and has since spread across much of southern Europe. In response to recent claims of control failure with neonicotinoids in Tunisia, we have used a molecular assay to investigate the presence and distribution of this target-site mutation in samples collected from six locations and six crops attacked by M. persicae. RESULTS: The resistance allele containing R81T was present at substantial frequencies (32–55%) in aphids collected between 2014 and 2016 from northern Tunisia but was much rarer further south. It occurred in aphids collected from the aphid's primary host (peach) and four secondary crop hosts (potato, pepper, tomato and melon). Its absence in aphids from tobacco highlights complexities in the systematics of M. persicae that require further investigation. CONCLUSION: This first report of R81T from North Africa reflects a continuing expansion of its range around the Mediterranean Basin, although it remains unrecorded elsewhere in the world. Loss of efficacy of neonicotinoids presents a serious threat to the sustainability of aphid control.Peer reviewe

    Examining the Challenges and Opportunities of Managing Public Services in a Complex and Interconnected World

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    This research looks into the difficulties and potentials of public service management in today's increasingly complicated and interconnected world. Through a review of the literature and an examination of the available data, the authors of this study highlight the obstacles that public administration must overcome in order to advance social, economic, and environmental sustainability. Multilateral cooperation, stakeholder engagement, strategic planning, public-private partnerships, innovation and entrepreneurship, sustainable development, community engagement, inclusive policies, social safety nets, renewable energy, sustainable land use, disaster risk reduction, digitalization of services, smart infrastructure, and cybersecurity are all identified as opportunities and potential solutions in the study. Managing public services in today's fast-paced world is fraught with complex challenges, and this analysis emphasizes the need for holistic approaches that involve cooperation and innovation across sectors. Policymakers and researchers working to promote social, economic, and environmental sustainability in the public sector can benefit from this study's suggestions and consequences

    Il Fenomeno delle Dipendenze nella Regione Liguria. Anno 2009

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    Report on the state of legal and illegal substances use in the territory of Liguria RegionIl Report analizza il fenomeno delle dipendenze nella regione Liguria. La descrizione del fenomeno si sviluppa intorno all\u27analisi degli indicatori individuati dall\u27Osservatorio Europeo delle Dipendenze di Lisbona (OEDT): 1-uso di sostanze nella popolazione generale (questo indicatore va a rilevare i comportamenti nei confronti di alcol e sostanze psicoattive da parte della popolazione generale); 2-prevalenza d\u27uso problematico delle sostanze psicoattive; 3-domanda di trattamento degli utilizzatori di sostanze; 4-mortalit? degli utilizzatori di sostanze; 5-malattie infettive. Altri due importanti indicatori che si stanno sviluppando, e che vengono qui illustrati, sono l\u27analisi delle Schede di Dimissione Ospedaliera (SDO) e gli indicatori relativi alle conseguenza sociali dell\u27uso di droghe (criminalit? droga correlata). Inoltre sono state applicate diverse metodologie standard di stima sia per quantificare la quota parte sconosciuta di utilizzatori di sostanze che non afferiscono ai servizi, sia per identificarne alcune caratteristiche

    Il Fenomeno delle Dipendenze nella Regione Abruzzo. Rapporto Anno 2009

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    Report on the state of legal and illegal substances use in the territory of Abruzzo RegionIl Report analizza il fenomeno delle dipendenze nella Regione Abruzzo. La descrizione del fenomeno si sviluppa intorno all\u27analisi degli indicatori individuati dall\u27Osservatorio Europeo delle Dipendenze di Lisbona (OEDT): 1-uso di sostanze nella popolazione generale (questo indicatore va a rilevare i comportamenti nei confronti di alcol e sostanze psicoattive da parte della popolazione generale); 2-prevalenza d\u27uso problematico delle sostanze psicoattive; 3-domanda di trattamento degli utilizzatori di sostanze; 4-mortalit? degli utilizzatori di sostanze; 5-malattie infettive. Altri due importanti indicatori che si stanno sviluppando, e che vengono qui illustrati, sono l\u27analisi delle Schede di Dimissione Ospedaliera (SDO) e gli indicatori relativi alle conseguenza sociali dell\u27uso di droghe (criminalit? droga correlata). Inoltre sono state applicate diverse metodologie standard di stima sia per quantificare la quota parte sconosciuta di utilizzatori di sostanze che non afferiscono ai servizi, sia per identificarne alcune caratteristiche

    Bibliography of Ethiopian Semitic, Cushitic and Omotic Linguistics XXII: 2018

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    Bibliography of Ethiopian Semitic, Cushitic and Omotic Linguistics XXII: 201

    Bibliography of Ethiopian Semitic, Cushitic and Omotic Linguistics XXI: 2017

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    Bibliography of Ethiopian Semitic, Cushitic and Omotic Linguistics XXI: 201

    Il fenomeno delle dipendenze nella regione Abruzzo. Rapporto anno 2010

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    -Il Report analizza il fenomeno delle dipendenze nella regione Abruzzo. La descrizione del fenomeno si sviluppa intorno all\u27analisi degli indicatori individuati dall\u27Osservatorio Europeo delle Dipendenze di Lisbona (OEDT): 1-uso di sostanze nella popolazione generale (questo indicatore va a rilevare i comportamenti nei confronti di alcol e sostanze psicoattive da parte della popolazione generale); 2-prevalenza d\u27uso problematico delle sostanze psicoattive; 3-domanda di trattamento degli utilizzatori di sostanze; 4-mortalit? degli utilizzatori di sostanze; 5-malattie infettive. Altri due importanti indicatori che si stanno sviluppando, e che vengono qui illustrati, sono l\u27analisi delle Schede di Dimissione Ospedaliera (SDO) e gli indicatori relativi alle conseguenza sociali dell\u27uso di droghe (criminalit? droga correlata). Inoltre sono state applicate diverse metodologie standard di stima sia per quantificare la quota parte sconosciuta di utilizzatori di sostanze che non afferiscono ai servizi, sia per identificarne alcune caratteristiche
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