1,721,312 research outputs found
The role of music therapy in the treatment of children with cancer: A systematic review of literature
No full textBackground: and purpose: Music Therapy has become a consolidated strategy to relief stress in children during hospitalization, and previous research demonstrated its efficacy on individuals’ health. This is a systematic review of literature on the application of music therapy with children and adolescent with cancer, with the aim of evaluating its feasibility and its benefits, in terms of physical and mental health. Methods: Database search was carried out via PubMed, PsycINFO and SCOPUS, using an age restriction of 0–24 years and the following keywords: (cancer OR oncology) AND music. Search was conducted from inception to June 2020. Results: From 462 studies retrieved, 19 were selected and included in this research, with 596 participants. They received three different types of music therapy: receptive music therapy (n = 4), active music therapy (n = 9) and the combined method of receptive and active interventions (n = 6). These studies indicated a significant reduction of psychological distress (n = 9) and an increase in well-being (n = 8). 8 articles evaluated the effects on subjective pain and other biological parameters, with inconclusive results. Conclusion: Music therapy, in paediatric oncology, seems to have a good feasibility and positive effects on mental and physical health. Nevertheless, some critical issues have emerged, such as the heterogeneity of interventions and study designs, which make generalizability still difficult. These and other clinical implications are discussed
A METHOD FOR THE DESIGN OF RING DAMPERS FOR GEARS IN AERONAUTICAL APPLICATIONS
No full textIn order to reduce resonant vibration of thin walled gears used for aeronautical applications, friction ring dampers may be added to the gear. In order to design the damper geometry, engineers must be able to evaluate its effect on the dynamics of the gear. In this paper a method for the calculation of the forced response of gears with friction ring dampers for aeronautical applications is proposed for the first time. The gear and the damper are modeled by means of FEM and they are coupled by means of contact elements, characterized by tangential and normal contact stiffness. The periodical response of the system is computed in the frequency domain, by means of the harmonic balance method. The harmonic excitation is calculated by means of Fourier analysis of the periodic force profile acting on the gear teeth. The methodology is applied to a case of industrial interest. The effect of the principal design parameters of the ring damper is highlighte
Deformation measurements by ESPI technique on clay components used in beam-block concrete floors
No full textUn metodo per la progettazione di smorzatori ad anello per ingranagggi di applicazione aeronautica
No full textIn order to limit HCF damage due to high vibration amplitudes of thin-walled gears for aeronautical applications, the damping of the system is increased by means of friction ring dampers, placed into a groove and kept in contact with its base by means of the centrifugal force. In this paper, a method for the calculation of the forced response of gears for aeronautical application coupled to ring dampers is proposed. Both the gear and the ring damper are modelled by means of FEM. The two components are coupled by contact elements characterized by tangential and normal contact stiffness, Coulomb friction law and one dimensional relative motion. Due to the non-linear contact forces, the problem must be solved iteratively by using a limited set of non-linear equations. The harmonic excitation is calculated by means of Fourier analysis of the periodic force profile acting on the loaded teeth. The methodology is applied to a case of industrial interest. The effect of the principal design parameters of the ring damper which affect the dynamics of the gear is also highlighte
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
Modificazioni morfologiche dell'anello fibroso durante l'invecchiamento. Studio ultrastrutturale.
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