1,721,025 research outputs found
INDAGINI SULLO STATO DI CONSERVAZIONE DELLE STRUTTURE
No full textIL CAPITOLO 4 (DI CUI ANDREA GIANNANTONI E' COAUTORE INSIEME A FRANCESCO CORTESI E LAURA LUDOVISI) SI INTITOLA "INDAGINI SULLO STATO DI CONSERVAZIONE DELLE STRUTTURE". VIENE DESCRITTO IL PERCORSO CONOSCITIVO PER GIUNGERE AD UNA ADEGUATA DIAGNOSI STRUTTURALE DEI FABBRICATI, ILLUSTRANDO ANCHE ALCUNE TECNICHE DI INTERVENTO PER LA MITIGAZIONE DEL RISCHIO SISMICO. VENGONO ANCHE ILLUSTRATI ALCUNI ESEMPI DI INTERVENTI REALIZZATI
Study of a discriminative technique between radon and thoron in the Radout detector
No full textRadon is a gaseous alpha emitter radionuclide deriving from the primordial radioactive nuclides present on Earth. Although only 222Rn isotope is commonly considered in radon pollution surveys, there is another isotope, 220Rn, also called Thoron, that is dangerous for human health. In this work these two radon isotopes discrimination is investigated, using a solid-state nuclear track detector (SSNTD) based passive detector named Radout. Experimental exposures to 220Rn and 222Rn were performed and the CR-39 SSNTDs, placed in the Radout detector, were chemically etched and analysed with the automatic track detector reader Politrack®. The analysis of track morphology performed by Politrack® allows to measure the reduced etch rate V for each track. The distributions of V have different shapes for 220Rn and 222Rn exposure, permitting to define a distribution parameter indicative of the presence of 220Rn. The experimental data are compared with a computational model that calculates the expected V distributions produced by the two radionuclides. The agreement of the model with the experimental data is very satisfactory
SLEEP PROBLEMS AND DAYTIME BEHAVIOUR IN CHILDHOOD IDIOPATHIC EPILEPSY
No full textPURPOSE:
To evaluate the presence of sleep problems and their association with behavioral and adjustment problems in children with idiopathic epilepsy.
METHODS:
A parental questionnaire was used to assess sleep problems in 89 children with idiopathic epilepsy for comparisons with 49 siblings and 321 healthy control children, equally distributed for age and sex. Sleep problems were clustered into five factors: parasomnias, parent/child interaction during the night, sleep fragmentation, daytime drowsiness, and bedtime difficulties. Daytime behavior and psychological adjustment were assessed by means of the Child Behavior Checklist. Maternal distress and disturbance was evaluated by the Malaise Inventory. The better to identify factors associated with sleep problems in the children with epilepsy, multiple regression analysis was performed.
RESULTS:
Children with epilepsy showed significantly more sleep problems than did both siblings and healthy controls. Within the epileptic group, children with current seizures complained more of sleep problems than did the seizure-free children. Moreover, children with epilepsy showed more behavioral problems and maladjustment. Age, paroxysmal activity density, duration of illness, seizure frequency, and behavioral problems were significantly associated with sleep problems in the epileptic group.
CONCLUSIONS:
The results of this study in a highly selected sample pointed out the presence of sleep problems, and adjustment and behavioral problems in children with idiopathic epilepsy. The presence of epilepsy, although benign, in childhood is associated with adaptive problems of the child. From this point of view, the alteration of some sleep habits may be a sign of emotional maladjustment. Although parents failed to perceive them as a problem, our findings indicate that attention to sleep and behavioral problems is important in clinical management of children with idiopathic epilepsy
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
SONNO E PROBLEMATICHE EMOZIONALI IN ADOLESCENZA: INDAGINE EPIDEMIOLOGICA SU UN CAMPIONE RAPPRESENTATIVO NAZIONALE
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
SLEEP CHARACTERISTICS IN HEALTHY CHILDREN FROM BIRTH TO 6 YEARS OF AGE IN THE URBAN AREA OF ROME
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