Search results for "31"
showing 10 items of 4401 documents
Power Density Optimization of EMI Filters for Power Electronic Converters
The switching power converters are used in a broad variety of applications, from the consumer electronics to the DC distribution systems, from the vehicle applications (road vehicles, marine vehicles, aircraft) to the industrial automation. In each of these application fields, the conversion systems which present more compact size and reduced weight, at the same power, are strongly required in relation to stringent design constraints. In this context, the optimization of the power density of the converter becomes an essential requirement. The increase of the switching frequency of the static devices allows an improvement of the power density, thanks to the possibility of reducing the sizes …
Design of Soft Ferrite filters for EMI reduction in Power Conversion Systems
2019
The use of a discrete passive filter is the most attractive solution for EMI reduction in power conversion systems. This is due to its simplicity of concept and efficiency in the frequency range up to tens of megahertz and over. The common mode and differential mode sections of the EMI filter contain capacitors and soft magnetic chokes and, when they are used in the transportation context, their design has to satisfy further constraints in terms of low weight, low volume, low losses and low cost in adjoint to filtering efficiency. In this framework the authors, by using an EMI filter design procedure already setup by themselves, investigate, also with an experimental setup, the possibility …
L'Exposition Coloniale Internationale de Paris 1931
2009
Già nelle più importanti esposizioni parigine d’età positivista, fin dall’Exposition Universelle del 1878, la comparsa di padiglioni dedicati a terre lontane e a forme di civiltà “altre”, e quindi configurati con eclettiche strumentazioni formali (genericamente etichettate come orientaliste) riferite alle rispettive culture architettoniche e artistiche, unitamente alle installazioni di vere e proprie ambientazioni abitative di popolazioni eufemisticamente definite «puramente naturali», corredate di tutto punto e animate dalla presenza di gruppi umani e, spesso, della fauna e della flora dei paesi d’origine, aveva generato una spirale di interesse o di pura curiosità, non di rado morbosa, da…
Menopause and diabetes: EMAS clinical guide
2018
Abstract Introduction Whether menopause increases the risk of type 2 diabetes mellitus (T2DM) independently of ageing has been a matter of debate. Controversy also exists about the benefits and risks of menopausal hormone therapy (MHT) in women with T2DM. Aims To summarise the evidence on 1) the effect of menopause on metabolic parameters and the risk of T2DM, 2) the effect of T2DM on age at menopause, 3) the effect of MHT on the risk of T2DM, and 4) the management of postmenopausal women with T2DM. Materials and methods Literature review and consensus of experts’ opinions. Results and conclusion Metabolic changes during the menopausal transition include an increase in and the central redis…
The role of prognostic stratification on prescription of anticoagulants in older patients with atrial fibrillation : a multicenter, observational, pr…
2022
Background: Literature suggests that different risks of mortality could influence physicians in prescribing or not anticoagulants in older patients with atrial fibrillation (AF). The Multidimensional Prognostic Index (MPI) can be considered a tool for the detection of multidimensional frailty. The aim of this cross-sectional study was to evaluate whether prescription patterns of oral anticoagulants exist, based on MPI values. Methods: Older hospitalised patients (age >= 65 years) with non-valvular AF were included across 24 European centres. MPI was calculated using validated and standardised tools derived from a comprehensive geriatric assessment. Other functional and clinical information …
Factors behind Leisure-Time Physical Activity Behavior Based on Finnish Twin Studies : The Role of Genetic and Environmental Influences and the Role …
2014
Different approaches are being taken to clarify the role of various factors in the development of physical activity behaviors. Genetic studies are a new area of physical activity research and also the motives for physical activity have been widely studied. The purpose of this paper is to review the findings emerging from the longitudinal genetic studies on leisure-time physical activity and to evaluate the associations between motivational factors and leisure-time physical activity. The focus is to review recent findings of longitudinal Finnish twin studies. The results of the latest longitudinal Finnish twin studies point to the existence of age-specific genetic and environmental influence…
Automated analysis of images for molecular quantification in immunohistochemistry.
2018
The quantification of the expression of different molecules is a key question in both basic and applied sciences. While protein quantification through molecular techniques leads to the loss of spatial information and resolution, immunohistochemistry is usually associated with time-consuming image analysis and human bias. In addition, the scarce automatic software analysis is often proprietary and expensive and relies on a fixed threshold binarization. Here we describe and share a set of macros ready for automated fluorescence analysis of large batches of fixed tissue samples using FIJI/ImageJ. The quantification of the molecules of interest are based on an automatic threshold analysis of im…
Lymphatic vessels are present in human saccular intracranial aneurysms
2022
AbstractSaccular intracranial aneurysm (sIA) rupture leads to subarachnoid haemorrhage and is preceded by chronic inflammation and atherosclerotic changes of the sIA wall. Increased lymphangiogenesis has been detected in atherosclerotic extracranial arteries and in abdominal aortic aneurysms, but the presence of lymphatic vessels in sIAs has remained unexplored. Here we studied the presence of lymphatic vessels in 36 intraoperatively resected sIAs (16 unruptured and 20 ruptured), using immunohistochemical and immunofluorescence stainings for lymphatic endothelial cell (LEC) markers. Of these LEC-markers, both extracellular and intracellular LYVE-1-, podoplanin-, VEGFR-3-, and Prox1-positive…
How do early family systems predict emotion recognition in middle childhood?
2021
Facial emotion recognition (FER) is a fundamental element in human interaction. It begins to develop soon after birth and is important in achieving developmental tasks of middle childhood, such as developing mutual friendships and acquiring social rules of peer groups. Despite its importance, FER research during middle childhood continues to be rather limited. Moreover, research is ambiguous on how the quality of one's early social-emotional environment shapes FER development, and longitudinal studies spanning from infancy to later development are scarce. In this study, we examine how the cohesive, authoritarian, disengaged and enmeshed family system types, assessed during pregnancy and inf…
Developing preschoolers' social skills through cross-cultural physical education intervention
2013
The purpose of this study was to investigate the changes in children's social skills after their participation in a physical education programme named ESPEC (‘Early Steps’ Physical Education Curriculum). The evaluators of the children's social skills were the trained educators who implemented the curriculum as well as parents of the participating children. This study was conducted in three European countries and was part of a European transnational project. The participants were 286 preschoolers from Cyprus, Greece and Italy. Twelve educators and 286 parents completed the ‘Social Behaviour Instrument’ (SBI) before and after the implementation of the ESPEC. This four months’ physical educati…