1,721,079 research outputs found
The relationship between board service task, knowledge and export intensity in family firms
No full textRealizzazione di un impianto di pirolisi e gassificazione di combustibili solidi per la produzione di syngas ad alto contenuto di idrogeno e basso impatto ambientale
Full text linkIl presente documento costituisce una prima bozza di studio progettuale relativo ad un impianto di trattamento termico per combustibili solidi con particolare attenzione all’utilizzo del carbone, con una tecnologia combinata di pirolisi (tamburo rotante) e gassificazione (letto fluido). Scopo dell’impianto è fornire informazioni utili all’approfondimento delle tematiche scientifiche affrontate nella piattaforma Zecomix, nei processi di gassificazione e carbonatazione con utilizzo di diverse tipologie di carbone e di reagenti e/o catalizzatori. Sarà inoltre utilizzato come ‘test rig’ per lo studio di un ciclo integrato pirolisi/gassificazione/combustione per l’ottimizzazione della produzione di syngas ad alto contenuto di idrogeno da carbone, a basso impatto ambientale. L’impianto denominato VAL.CH.I.RI.A (VALorizzazione CHar, Impianto RIcerche Avanzate) sarà costituito dai componenti minimi rappresentati nel P&I allegato e parte integrante del presente studio. La versatilità dell’impianto permetterà l’utilizzo dello stesso anche studiando il comportamento di combustibili non convenzionali come biomasse e miscele carbone /biomasse. Sarà inoltre possibile utilizzare i vari componenti in modo separato ed in modo integrato come riportato di seguito:
- alimentazione – pirolisi – torcia;
- alimentazione – gassificazione – torcia;
- alimentazione – pirolisi – gassificazione – torcia.
La pressione di esercizio sarà prossima a quella atmosferica per facilitare la esecuzione delle prove e la realizzazione strutturale della componentistica.
Esso verrà realizzato presso il Centro Ricerche ENEA Casaccia in prossimità della piattaforma Zecomix e, al fine di ottimizzare il suo utilizzo, verrà costruito su skid di facile allocazione e spostamento in loco
How Do Corporate Governance Characteristics Affect Financial Transparency and Disclosure? Evidence From Italy.
No full textOwnwship and control in local utilities: the italian case
No full textAbstract: The paper discusses the ownership and control structures of local public utilities by showing evidence from the Italian case. In this discussion, the focus is on three main aspects: the ownership structure, the board composition and independence, and citizens’ involvement (service charters). The main results from this study reveal that there are controversial aspects, which need further investigation. The existence of a principal–principal conflict is clearly arising from an in-depth analysis of the ownership structures. In addition, the board of directors, because of the lack of actual independence, does not seem to be a useful arena to manage and solve these conflicts. Other governance mechanisms are thus needed, to increase accountability to citizens. Within this, service charters seem to be a useful tool to protect the “public interest”. However, service charters content analysis suggests that further implementation actions are due. The paper contributes to the debate on conflicts of interests and governance mechanisms in local public utilities suggesting possible developments of agency theory and discussing implications for further research
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Book4All: A Tool to Make an e-Book More Accessible to Students with Vision/Visual-Impairments
No full textEmpowering people who are blind or otherwise visually impaired includes ensuring that products and electronic materials incorporate a broad range of accessibility features and work well with screen readers and other assistive technology devices. This is particularly important for students with vision impairments. Unfortunately, authors and publishers often do not include specific criteria when preparing the contents. Consequently, e-books can be inadequate for blind and low vision users, especially for students. In this paper we describe a semi-automatic tool developed to support operators who adapt e-documents for visually impaired students. The proposed tool can be used to convert a PDF e-book into a more suitable accessible and usable format readable on desktop computer or on mobile devices
Variations on the Author
Full text link“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
Full text linkWe 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
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