1,721,024 research outputs found
The homogenisation technique applied to the analysis of shear wall built with hollow bricks
No full textFracture and notch mechanics to estimate the uniaxial fatigue limit of plain and severely notched L-PBF AlSi10Mg specimens
No full textThis work discusses the applicability of the notch mechanics and linear elastic fracture mechanics to estimate the uniaxial fatigue limit of sharply notched Additively Manufactured (AMed) specimens. It is well known that the fatigue behaviour of AMed materials is influenced by defects inherent to the manufacturing process and the fatigue strength of materials weakened by defects depends on material properties, load ratio R and size of defects. While defect sensitivity on fatigue thresholds has been studied extensively in the literature for different AM materials, investigations on the effect of notches, and especially sharp notches, including notch-defect interaction and competition are still limited, leaving considerable scope for theoretical and experimental investigations. In this study, fatigue tests were conducted on plain and sharply notched specimens AMed from AlSi10Mg powders to investigate the competition between AM process-related defects and sharp notches. The investigation highlighted that AM defects are detrimental for plain specimens, while they do not impact the fatigue strength of sharp notches. A previously published model proved satisfactory to predict the fatigue limit of the plain and sharply notched specimens; the model requires two material properties, namely the plain material fatigue limit and the threshold range of the mode I stress intensity factor for long cracks
The 48-Hour Protocol on Deaths Following Traumatic Events at the Hospital of Novara in Eastern Piedmont, Italy: A Review of the Effectiveness of Reporting to the Judicial Authority
No full textIn the past decades, the autopsy rate has been declining worldwide, including in Italy, especially of judicial autopsies, partially losing sight of the pivotal
importance of autopsy in detecting the cause and the manner of death.1-4 Indeed, discrepancies between clinical diagnosis and hospital autopsy are quite high.5,6
This study aims to review the effectiveness of the “48-hours protocol” in operation at the hospital “Maggiore della Carità” of Novara. This protocol states that after the
death of a patient with a traumatic event in their past medical history, a notification of death must be sent to the Judicial Authority, which must be made aware that, after
a time of 48-hours, a non-judicial autopsy is planned, giving the time to decide if the autopsy should be changed into a judicial one or not.
The review was made on all cases in which the “48h protocol” came into effect, in the years 2017, 2020, and 2023. Out of the 127 medical death records, 116 were
correctly reported as 48-hour protocols. A total of 107 autopsies were carried out, among which 103 were hospital ones, and only 4 were judicial ones. The most
documented traumatic events were falls at home, followed by road traffic accidents. Over 46% of the autopsy results totally or partially differed from clinical diagnosis
made in the hospital.
The interpretation of the results of this study suggests three conclusions: first, the autopsy is pivotal to correctly detect the cause of death in traumatic deaths; second, the
Judicial Authority does not make enough and proper use of the “48-hours protocol,” underestimating the role of judicial autopsies; and third, that the protocol might be
too superficially used.
Therefore, some changes to the protocol should be made in order to have a better communication to the Public Prosecutor’s Office, maybe adding more specific
information to the reports sent to hopefully increase the authorities’ interest.
Once these details have been refined, and the usefulness of this protocol validated, it would also be desirable to disseminate it to other prosecutors’ offices to raise awareness
of the issue throughout Italy
Notch and Fracture Mechanics-Based Assessment of Multiaxial Fatigue Thresholds of Defects and Sharp Notches in Metallic Materials
Full text linkThis investigation focuses on the constant amplitude (CA) multiaxial fatigue limit of components made of metallic materials weakened by defects, cracks, and sharp U- and/or V-notches. To estimate the multiaxial fatigue thresholds of plain, sharply notched, and cracked materials and defects, a novel theoretical framework based on the well-known averaged strain energy density (SED) criterion is proposed, which extends the Atzori–Lazzarin–Meneghetti (ALM) diagram to multiaxial loading. The proposed design equations are validated against 128 experimental multiaxial fatigue limits, taken from the literature
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
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