1,354,339 research outputs found

    Imperi fuori dall’Impero: esperienze imperiali in Spagna e in Inghilterra (IX-X sec.)

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    Spagna e Inghilterra hanno vissuto due storie separate ma per certi versi confrontabili. Entrambe sono state province dell’Impero Romano per poi rimanere fuori dall’Impero Carolingio. Entrambe hanno sofferto un’invasione per mano di nemici della fede cristiana: gli Arabi nel 711 e i Danesi a partire dalla ne dell’VIII secolo. Entrambi i paesi hanno vissuto sia un momento di forte unità, che di accentuata frammentazione, con la presenza di diverse etnie all’interno dei propri con ni. I monarchi cristiani ispanici e anglosassoni del X secolo hanno dato una risposta sostanzialmente simile a questa serie di fattori storici comuni. La soluzione è stata quella di proporre una monarchia di tipo imperiale, intendendo con questo un potere “sovranazionale”, avente per base un territorio suddiviso in più regni e come referente ultimo un sovrano in qualità di rex regum. Si trovano tracce di queste aspirazioni imperiali sia in fonti cronachistiche, sia in fonti documentarie. Nel caso spagnolo termini quali imperator, imperium e imperante sono presenti nella documentazione concernente la monarchia asturiano-leonese. Nel caso inglese, invece, non ci si può basare tanto sull’uso del termine imperator – che pure appare in più documenti – quanto sui numerosi riferimenti che vengono fatti alla “overlordship” dei sovrani nella Anglo-Saxon Chronicle e nei documenti regi, dove leggiamo titolature come: rex totius Brittaniae o, addirittura, basileus. Questi imperi ci appaiono come il frutto di un più lungo percorso, iniziato nel tardo IX secolo, quando vennero effettuati consapevoli tentativi di riallacciare il presente alle sue radici culturali, come testimonia il forte interesse di Alfredo di Wessex (871-899) e di Alfonso III di Asturia (866-909) per la storia del proprio popolo. Tale ricostruzione identitaria e culturale fu propedeutica alle forme imperiali che comparvero successivamente, e ne costituì la base ideologica. Scopo di questo lavoro è confrontare le due esperienze imperiali, evidenziando somiglianze e diversità

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    The identification of gaps in secondary evidence on health promotion addressed to elderly persons

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    Background Increasing participation of elderly population in modern societies is a source of great challenges for health and social systems. Health promotion and disease prevention interventions may have a significant effect on health status of older people. The main objective of this paper is presentation of potential gaps in secondary evidence in the area of health promotion interventions addressed to audiences 65 years old or more (65+). Methods The results of the scoping review of secondary evidence on the effectiveness of health promotion and related interventions addressed to older adults (55+) and elderly persons (65+) published from 2000 to April 2015 were further explored. From these reviews, only these which analysed health promotion activities, combined with other general areas (primary prevention, screening, and/or social support) or alone, and designed for the subjects 65+ were selected. The analysis was focused on elicitation of publication trends and identification of targeted areas which were not or were addressed less frequently. Results Among 334 systematic reviews analysing the interventions related to health promotion, primary prevention, screening and social support, there were 66 which were classified to health promotion (as exclusive domain or in combination with other general area) and which were addressed specifically to persons of at least 65 years old. Potential areas which were covered the least frequently or not covered by reviews encompassed: addictions (n = 1), sleep quality (n = 1), psychosocial functioning (n = 1), social isolation (n = 0), social participation (n = 0) and elderly abuse (n = 0). Conclusions Although the secondary evidence on health promotion and related interventions addressed to population 65+ is growing, there are still blind spots not covered by adequate systematic review or/and meta-analyses. Identified deficient areas are potentially important for wellbeing of elderly persons in the context of social interactions. Key message: Although general issues included in health promotion strategies designed for elderly persons are adequately represented by secondary evidence, there are still important gaps in evidenc

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

    Induction machine stator fault on-line diagnosis based on LabVIEW environment

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    The benefits of machine condition monitoring have been widely recognized as superior with respect to other alternative maintenance approaches. As matter of fact, condition monitoring is an operational strategy for machine integrity assessment, fault identification and life extension. The cost-benefit ratio will be reduced in progress owing to the commercial diagnostic environment availability. This paper presents the implementation of a diagnostic procedure to detect induction machine stator faults based on LabVIEW environment. The diagnosis is performed by using a suitable neural network, trained by faulted machine simulator, that has, as input variables, the negative sequence current component and the variation of the positive sequence current component between actual and healthy machine conditions. The statement of a trigger threshold that discerns between true faults and intrinsic disymmetry of the machine is discussed as well
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