0000000000589489
AUTHOR
A. Alaimo
On the effect of the adhesive on piezoelectric bimorph response
Perinatal Treatment with 5-metoxytriptamine affects cognition and behavioural reactivity in the juvenile male rat progeny; influence of maternal separation
Sensitivity analysis of a piezoelectric SHM system for delaminated composite flange-skin structure
Effects of prenatal treatment with 5-metoxytriptamine on learning performance of juvenile male rat progeny. Influence of maternal separation
Post-Buckling Analysis of Damaged Multilayered Composite Stiffened Plates by Rayleigh-Ritz Method
A Rayleigh-Ritz approach for the analysis of buckling and post-buckling behavior of cracked composite stiffened plates is presented. The structure is modeled as the assembly of plate elements modeled by the first order shear deformation theory and taking geometric nonlinearities into account through the von Karman’s theory assumptions. Continuity along the plate elements connected edges and the enforcement of rigid and elastic restraints of the plate boundaries are obtained by using penalty techniques, which also allow to straightforwardly implement efficient crack modeling strategies. General symmetric and unsymmetric stacking sequences are considered and numerical procedures have been dev…
USE OF HERBAL REMEDIES AMONG CANCER AND TRANSPLANT PATIENTS IN THE TOWN OF PALERMO, SICILY
Concomitant use of herbal remedies may lead to toxicity or failure of conventional therapies in different patients. The objectives of this survey were to assess: (1) the prevalence of the use of vegetal remedies by cancer and transplanted patients (2) the level of communication about such use to the physicians (3) whether such use might be associated to adverse reactions or interactions with conventional drugs. The study was carried out on 100 consecutive cancer patients attending the outpatient medical oncology clinic of the University Hospital "P. Giaccone", Palermo and on other 100 transplanted patients who were hospitalized or followed up at ISMETT, Palermo. Another group was composed o…
DUE FRATELLI, IL PARVOVIRUS E DUE KAWASAKI CON FENOTIPO ATIPICO
E' rara la descrizione della Malattia di Kawasaki (MK) in fratelli, ma -se presente- è necessario escludere un trigger infettivo. Riportiamo il caso di due fratelli affetti da MK esordita contemporaneamente in seguito ad un’infezione da Parvovirus. Una bambina di 9 mesi ha presentato febbre, vomito, esantema, congiuntivite non purulenta bilaterale, linfoadenite. All’anamnesi, emergeva un episodio febbrile 12 giorni prima, con risoluzione spontanea in 5 giorni. Presentava: leucocitosi neutrofila, anemia, con transaminasi, Na, albumina, creatinina, urine nella norma. PCR: 2,31 mg/dl; VES: 120. ECG ed ecocardio sono risultati nella norma, con Z-score coronarici normali. IgM anti-Parvovirus era…
Shadowing e GIS qualitativo: due strumenti per narrare la città
Questo breve articolo descrive la città attraverso due tecniche di ricerca qualitativa (lo shadowing e il GIS qualitativo). Partendo da alcuni esempi, tratti dall’esperienza sul campo, vengono valutati limiti e possibilità delle tecniche in oggetto. L’obiettivo è quello di argomentare la necessità di utilizzare e sviluppare nuovi strumenti metodologici per conoscere le configurazioni urbane. Gli autori sostengono il bisogno di muoversi all’interno di un orizzonte interdisciplinare e di utilizzare tecniche capaci di far emergere narrazioni polifoniche della città. Analizzando le potenzialità dialogiche dello shadowing e le potenzialità sovversive dei GIS qualitativi, una cartografia capace d…
COVID-19 and relapsing Kawasaki disease: a case report during the pandemia
Introduction: The pandemia of COVID-19 remains a global health alarm with high incidence of lethality, especially in older age groups who suffer from underlying medical conditions. However, children are less likely to manifest severe conditions. Objectives: COVID-19 was correlated to a higher incidence and a suspected increased risk of Kawasaki Disease (KD) in children.
On the shear influence on the free vibration behavior of magneto-electro-elastic beam
A magneto-electro-elastic Timoshenko beam model is presented and employed to study the effect of the shear strain on the free vibration behavior of the beam. Once the differential governing equation for Timoshenko magneto-electro-elastic beam is derived, the Euler-Bernoulli model is obtained by letting be zero some of the governing equation coefficients. Results for the Timoshenko and Euler- Bernoulli beam are presented in comparison with two-dimensional finite element computation.
Global/local Fracture Mechanics Analyses of Advanced Aerospace Structures
A beam theory for layered composites subjected to uniformly distributed load
A theory for multilayered composite beams undergoing transverse uniformly distributed loads is presented. The formulation starts by assuming a layer-wise kinematical model characterized by third order approximation of the axial displacements and fourth order approximation of the transverse displacements. By enforcing the point-wise balance equations as well as the interface continuity conditions, the layer-wise kinematical model is rewritten in terms of a set of generalized kinematical variables associated with the beam as a whole. Stress resultants are then obtained in terms of the generalized variables derivatives and of the normal stresses applied to the top and bottom surfaces of the la…
Kawasaki disease triggered by parvovirus infection: an atypical case report of two siblings.
Abstract Background There are reports of the familial occurrence of Kawasaki disease but only a few reports described Kawasaki disease in siblings. However, the familial cases were not simultaneous. In these patients the idea of infective agents as trigger must be considered. Case presentation We describe two siblings with atypical presentations of Kawasaki disease; the sister was first diagnosed as having parvovirus infection with anemia and the brother was diagnosed as having myocarditis. The first patient was a 9-month-old Caucasian girl with fever, conjunctivitis, rash, and pharyngitis, and later she had cervical adenopathy, diarrhea and vomiting, leukocytosis, and anemia, which were ex…
Effects of Prenatal Treatment with 5-Metoxytryptamine on Learning Performance of Juvenile Male Rat Progeny. Influence of Maternal Separation
UNA MALATTIA DI KAWASAKI AD ESORDIO MOLTO PRECOCE
Presentiamo il caso di Nicolas, un lattante di 3 mesi giunto alla nostra osservazione per febbre elevata da 3 giorni poco responsiva al paracetamolo. Secondogenito, nato da gravidanza normodecorsa, genitori non consanguinei. In anamnesi un precedente ricovero all’età di un mese di vita per bronchiolite; ha eseguito la prima dose di vaccino esavalente. All’ingresso in reparto Nicolas si presentava particolarmente irritabile, con congiuntivite bilaterale, rinorrea sierosa, cheilite, adenite latero-cervicale con un esantema polimorfo maculo-papulare al volto e al tronco. Nel sospetto di malattia di Kawasaki è stato effettuato un ecocardiogramma-color-doppler che mostrava una lieve dilatazione …
Variable kinematics equivalent single layer theories for magneto-electro-elastic multilayered plates
In recent years, the employment of smart materials able to provide multi-functional capabilities, besides the traditional structural functions, has been gaining attention in several technological fields (automotive, aerospace, biomedical, robotics, etc.). This possibility of coupling different physical fields can be and it has been exploited in transducer applications, structural health monitoring, vibration control, energy harvesting and other applications. In this framework, magneto-electro-elastic (MEE) materials are attracting increasing consideration from academic and industrial audiences: MEE materials have the ability to couple mechanical, electrical and magnetic fields and this make…
Global/Local FEM-BEM stress analysis of damaged aircraft structures
In this paper a Hierarchical approach for the analysis of advanced aerospace structures is presented. The proposed Global/Local model uses two kind of numerical methods. The first step of the Hierarchical procedure is performed by the Finite Element code Patran/Nastran™, using a coarse mesh to study the global structure, then the local region is analyzed by using a Boundary Element code based on the multidomain anisotropic technique. This code accurately predicts stress concentrations at crack tips with a reduction of the modeling efforts and of the computational time. The Global/Local interface code implemented allows an intuitive extraction of the local region with a substantial reduction…
Structural Health Monitoring Procedure for Composite Structures through the use of Artificial Neural Networks
In this paper different architectures of Artificial Neural Networks (ANNs) for structural damage detection are studied. The main objective is to investigate an ANN able to detect and localize damage without any prior knowledge on its characteristics so as to serve as a real-time data processor for Structural Health Monitoring (SHM) systems. Two different architectures are studied: the standard feed-forward Multi Layer Perceptron (MLP) and the Radial Basis Function (RBF) ANNs. The training data are given, in terms of a Damage Index ℑD, properly defined using a piezoelectric sensor signal output to obtain suitable information on the damage position and dimensions. The electromechanical respon…