1,720,977 research outputs found
Osservatorio regionale tariffe e tributi comunali: anno 1998
No full textL’Osservatorio regionale delle tariffe e dei tributi comunali della Regione Umbria è stato istituito dalla Giunta Regionale dell'Umbria con la deliberazione n. 9039 del 7 dicembre 1993, in attuazione della legge regionale n. 34 del 10 luglio 1987, concernente “Norme per la tutela dei consumatori e degli utenti ed istituzione della Consulta Regionale per l’utenza ed il consumo”, con l'obiettivo di predisporre uno strumento conoscitivo in grado di fornire informazioni sul livello e sulla dinamica delle tariffe dei principali servizi pubblici locali, sia a rete che a domanda individuale, nonché sul livello e sulla dinamica dei principali tributi comunali.
Tale iniziativa si inserisce nell’ambito del dibattito sulle autonomie locali e sul federalismo fiscale ed il connesso ridimensionamento del potere impositivo dello Stato a favore degli Enti Locali. L’Osservatorio si propone di sopperire alla carenza di informazione sulle tariffe e sui tributi di competenza degli Enti Locali e delle aziende erogatrici di servizi di pubblica utilità della regione dell’Umbria, cercando di fornire un quadro di riferimento significativo sulle relative politiche tariffarie e tributarie. Allo stesso tempo, l’iniziativa dell’Osservatorio va incontro alla necessità di trasparenza nel rapporto tra cittadino e Pubblica Amministrazione e si collega ad altre iniziative quali le Carte dei Servizi e la costituzione delle Authorities, cercando di fornire il cittadino utente dei necessari minimi elementi di valutazione delle politiche tariffarie di competenza delle aziende erogatrici di servizi e delle Pubbliche Amministrazioni, per il pieno esercizio dei suoi diritti fondamentali di partecipazione, informazione e reclamo.
Il presente rapporto presenta i risultati della rilevazione delle tariffe e dei tributi comunali relativi all’anno 1998. Dopo aver descritto gli aspetti più strettamente tecnici attinenti alla rilevazione, allo spoglio ed alla elaborazione dei questionari, verranno presentati i principali risultati della rilevazione per l’anno 1998 separatamente per ciascun servizio o tributo. In particolare si presentano i risultati relativi ai servizi a domanda individuale, ai servizi a rete, e ai tributi comunali in senso stretto.
Infine, si tenta di fornire un quadro di sintesi complessivo sulla base dei dati rilevati dall’Osservatorio sia relativamente al 1998 che, seppur in modo limitato, relativamente agli anni 1994 e 1996
Autonomous low-Earth-orbit station-keeping with electric propulsion
No full textThis paper studies the application of an electric propulsion system for autonomous station-keeping of a remote-sensing spacecraft flying at low altitude. The considered propulsion system exploits a xenon propellant bus, which operates both a low-power Hall-effect thruster and a resistojet. The former is used for continuous in-track control, while the latter provides the impulsive thrusts necessary for cross-track maneuvers. The adopted navigation solution
is based on an extended Kalman filter, employing gyro, star-tracker, and Global Positioning System measurements.
Lyapunov-based and proportional–derivative feedback laws are used for orbit and attitude control, respectively.
The performance of the proposed electric propulsion system and guidance, navigation, and control solution is
evaluated on a low-Earth-orbit mission
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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