1,720,963 research outputs found
ERASE – ElectRode-Aided Soil rEmediation: prove a scala di laboratorio
No full textERASE - ElectRode-Aided Soil rEmediation è una tecnologia di bonifica basata sull’integrazione di meccanismi fisici, chimici e biologici indotti da una appropriata alimentazione di almeno una coppia di elettrodi installati in un mezzo poroso (terreno eterogeneo/materiali di riporto, in condizioni sature o insature) interessato da inquinamento chimico organico e/o inorganico. Nell’ambito dell’appalto del progetto POSIDON PCP sono state condotte numerose prove di laboratorio su terreni con differenti tessiture e in varie condizioni operative, utilizzando apparati 2D e 3D. Viene illustrata la prova di laboratorio conclusiva, condotta con l’apparato 3D, ove sono stati investigati i meccanismi elettrocinetici, di interesse per la rimozione dei metalli, contestualmente all'ossidazione chimica con persolfato attivato, di interesse per la degradazione in situ degli inquinanti organici. Il test ha mostrato che l’approccio è una valida opzione per il trattamento di terreni insaturi affetti da inquinanti organici e inorganici, estendendo le attuali esperienze di letteratura, focalizzate principalmente a terreni saturi a granulometria fine e contaminazione disciolta
Longitudinal Speckle-Tracking Echocardiography of the Left and Right Ventricular Myocardium in Trained and Untrained Italian Blood Hound Dogs
No full textLeft shift of the ventricular mean electrical axis in healthy doberman pinschers
Full text linkIn canine electrocardiography, the reference interval of the ventricular mean electrical axis (MEA) is between +40° and +100°. MEA values in dogs can be influenced by the patient position as well as by the shape of the thorax. The aim of this study was to evaluate the MEA in healthy Doberman Pinschers, hypothesizing that some present a left shift of the MEA. In this retrospective study, 41 healthy, client-owned Doberman Pinschers were included. Echocardiography and standard six-lead ECG examination were performed in all dogs. The MEA was calculated using the isoelectric method. The morphology of the QRS complex and the Q/R ratio in lead II were also evaluated. The median MEA was +45° and ranged from -45° to +90°. MEA was deviated in 16/41 dogs (39%), all presenting a left axis deviation (range, -45° to + 30°). Age was significantly associated with the MEA (P=0.008), showing a negative linear correlation. A deep Q wave in lead II was present in 26/41 (63%) dogs. The Q/R ratio was higher in dogs presenting left shift of the MEA (0.66; range, 0.28-1.35) in comparison to dogs with a MEA within reference range (0.44; range, 0.04-0.73; P<0.001). In conclusion, a significant number of healthy Doberman Pinschers present a left shift of the MEA compare to the reference range, and dogs with MEA deviation show a higher Q/R ratio in lead II. This data should be considered when electrocardiographic evaluation is performed in Doberman Pinschers
SISTEMA E PROCEDIMENTO DI BONIFICA IN SITU CON ELETTRODI PER LA RIMOZIONE DI INQUINANTI INORGANICI E/O ORGANICI IN UN MEZZO POROSO
No full textUn procedimento di bonifica in situ per la rimozione di inquinanti inorganici e/o organici in un mezzo poroso che utilizza almeno una coppia di elettrodi (E1, E2) per attivare meccanismi di azione in funzione delle condizioni di esercizio. Il procedimento prevede di procedere alla caratterizzazione del sito e all’iniezione nel mezzo poroso di acqua e/o soluzioni chimiche per l’estrazione dal mezzo poroso degli inquinanti presenti e/o la loro degradazione all’interno del mezzo poroso stesso.
Per contaminazione da INORGANICI si attivano i processi di mobilizzazione e trasporto al fine di recuperare le specie chimiche in oggetto attraverso pozzi di estrazione (PE) o camere elettrodiche (CE) mediante alimentazione continua (DC).
Per contaminazione da ORGANICI si attivano i processi di ossidazione/riduzione e/o biodegradazione e/o elettro-ossidazione/riduzione e/o bio-elettrodegradazione con l’applicazione di alimentazione continua DC e successivamente si attiva una fase di alimentazione alternata AC allo scopo di riscaldare il mezzo poroso per accelerare la cinetica dei processi e/o attivare alcuni ossidanti chimici.
Per contaminazione MISTA la sequenza di operazioni può essere individuata sulla base della contaminazione prevalente, dell’abbattimento della contaminazione richiesto e della compatibilità dei differenti meccanismi di azione sulle diverse tipologie di inquinanti
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
Irreversible pulmonary hypertension and tricuspid regurgitation in young cats secondary to different lungworm infections.
No full textDispelling 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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