1,720,983 research outputs found
L'insediamento cristiano di "Case Romane" nell'isola di Marettimo dal periodo protobizantino alla rifondazione di età normanna
No full textQuesto contributo sintetizza i risultati preliminari di sette mesi di campagna di scavo nell’insediamento romano, bizantino e medievale di “Case Romane” a Marettimo. Questo scavo è stato realizzato nell’ambito di un progetto di restauro attuato con fondi della Comunità Europea e questo lavoro tiene conto anche dei risultati di questi interventi. Si tratta di un sito pluristratificato di una certa rilevanza anche per il ruolo importante giocato nell’isola nell’ambito di una prospettiva mediterranea. Marettimo infatti era un’importante scalo e statio lungo la rotta che collegava l’Africa (Capo Bon) con la capitale (Roma). In questa ottica non sfugge la rilevanza di queste ricerche. In particolare abbiamo dato ampio spazio alla fase tzrdoromana e proto bizantina durante la quale il sito diviene sede di un monastero / santuario con una piccola chiesa, un fonte battesimale e un impianto termale. Questa struttura resta in uso fino agli inizi dell’VIII secolo, quando mutate vicende politiche ed una certa instabilità nel controllo bizantino del mare, rendono insicura l’isola
Valutazione della sicurezza d’impiego di un’apparecchiatura elettromedicale ad emissione di radiofrequenza
No full textSono stati valutati i parametri fisici indicatori della sicurezza di impiego di un’apparecchiatura ad emissione di radiofrequenza bipolare per uso estetico. In osservanza delle direttive nazionali ed europee, sono stati valutati i livelli di emissione ambientale del campo elettromagnetico, la corrente indotta negli arti dell’operatore, l’esposizione dell’operatore, il Rateo di Assorbimento Specifico (SAR) del campo a radiofrequenza nei tessuti trattati. Le misurazioni sono state effettuate con sensori isotropici e misuratore di correnti indotte. I risultati delle misurazioni hanno evidenziato ottimi livelli di sicurezza
dell’apparecchiatura sia per l’ambiente che per l’operatore
e per il paziente, pur rendendone incompatibile l’utilizzo
con portatori di pace-makers, neurostimolatori e altri
dispositivi che presidiano a funzioni vital
Late oral mucosa alterations after radiotherapy for head and neck cancer: cytological study of radiation induced epithelial cells injury
No full textIntroduction and aims: Radiotherapy for head and neck (H&N) district malignancies may induce
permanent tissue damage leading to multiple life-long risks that place patients at continual risk for
oral sequelae. In our study late toxicity after radiotherapy for H&N cancer has been assessed by
exfoliative oral cytology.
Matherials and methods: Eligibility criteria were: age between 30 and 80, a minimum of two-year
follow-up after completion of 3D conformal radiotherapy for H&N solid tumors, with oral mucosa in
the fields of exposure of therapy. From december 2011 to may 2012, 14 consecutive patients were
enrolled at their programmed follow-up visit. They were 11 males and 3 females, mean age was 66.5
years (range 52-76), mean follow-up after radiotherapy was 47.3 months (range 24 –98), mean dose
was 65.6 Gy (range 50-70.2) with conventional fractionation, mean overall treatment time was 58.8
days (range 43-88). Tumor prevalent localization was oropharynx and oral cavity (11 out of 14 patients).
Seven underwent postoperative radiotherapy and six received concomitant chemotherapy. Smears were
collected by scraping left and right cheeck mucosa with wooden tongue spatulas, then transferred to 4
dry glass slides (2 for each cheeck), fixed immediately with Biofix® and stained with modified May
Grumwald Giemsa staining. Smears were examined under 400X power using a light microscope.
Results: All the smears collected showed cytological alterations: typical “folding” appearance of
epithelial cells, a particular cellular phenotype marker of radiation injury, with enlarged and
hypercromatic nucleus. In order to graduate the presence/absence of this specific cellular phenotype,
we counted the folding cells as a percentage of all cells per dry glass slide for each cheek, made the
average and finally scored them. On our preliminary data, we observed that in 9 out of 14 patients
there is a linear relation between dose delivered and oral mucosa injury but in 5 out of 14 patients
there was no correspondence between dose delivered and score of folding cells; 4 patients showed the
same score in left and right cheek but dose was not equally distributed between the two sites and 1
patient conversely showed symmetric distribution of dose but not of score. We can hypotize that also
immune system plays a key role in the variability of individual response of oral tissue to radiation
damage; our data need to be supported by a larger sample
Cytological alterations in oral mucosa and late toxicity after radiotherapy for head and neck cancer.
No full textUso della citologia esfoliativa orale per valutare la tossicità dopo raditerapia in pazienti affetti da cancro testa coll
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
Delayed oral mucosa injury after radiotherapy for head and neck cancer assessed by exfoliative oral cytology
No full textVariations 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
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