1,721,034 research outputs found
Quantitative damage evaluation of composite materials with microwave thermographic technique: feasibility and new data analysis
No full textIn this work microwaves were used as heating source to quantitatively evaluate the extension of damaged areas in composite materials using the thermographic technique. In particular, microwave pulsed thermography was carried out on CFRP damaged specimens. A new procedure was developed to process thermographic data obtained by microwave thermography tests and a new algorithm was used to processing thermography data. The approach used to evaluate the damaged areas is based on the characteristic non-linear heating behaviour and an higher slope of heating and cooling curves respect to undamaged area. The results obtained with new procedure were compared with other NDT techniques such as X-ray and lock-in thermography. Numerical simulations were carried out in order to assess the potential sensitivity of the new procedure. The aim of this work is to develop a quick procedure and data analysis in order to allow the non destructive testing of composite large structures in automatic way with a reduced testing time
Multimodality imaging of caseous mitral annular calcification complicated by possible systemic embolizations
No full textWe demonstrate the case of a man presenting with chest pain in which an initial assessment with echocardiography and, subsequently, with cardiac computed tomography led to a final diagnosis of caseous mitral annular calcification complicated by multiple embolizations.We demonstrate the case of a man presenting with chest pain in which an initial assessment with echocardiography and, subsequently, with cardiac computed tomography led to a final diagnosis of caseous mitral annular calcification complicated by multiple embolizations
Psychometric properties of the Gambling Related Cognitions Scale (GRCS) in young Italian gamblers
No full textIntroduction: The involvement in gambling activities is increasing among adolescents, together with the risk of developing gambling problems. Given the important role of erroneous beliefs on adolescent problematic gambling behavior, the aim of this study was to investigate the adequacy of the Gambling Related Cognitions Scale (GRCS; Raylu & Oei, 2004) to assess gambling-related distortions among youth in Italy.Methods: The scale was administered to 1656 Italian high school students (65% males, mean age = 16.15 years, SD = 1.44), and analyses were carried out with respondents who have gambled during the previous year (N = 1224).Results: The adequacy of the five-factor model was confirmed (both among male and female adolescent gamblers), as well as the reliability of the total scale and subscales. Evidence for the validity of the GRCS among adolescents was provided confirming the relationship between gambling-related cognitions and problem gambling found in previous studies. Research on the validity of the scale was also extended by investigating the relationship between cognitive distortions about gambling and the frequency of engaging in different gambling activities.Conclusions: Our results confirm that the GRCS is an effective multidimensional instrument which accurately measures young gamblers' cognitive distortions relating to gambling. As such, it can be used as a useful tool in the assessment and treatment of juvenile gambling. (C) 2015 Elsevier Ltd. All rights reserved
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
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