101,968 research outputs found
Electromagnetic and System level Co-simulation for RFID Radio Link modeling in Real Environment
No full textThe recent widespread diffusion of radio-frequency identification (RFID) applications operating in the UHF band have been supported by both the request for greater interrogation ranges and larger and faster data exchange.
UHF-RFID systems, exploiting a physical interaction based on Electromagnetic propagation, introduce many problems that have not been explored (or only partially) for the previous generations of RFID systems (e.g. HF). Therefore, the availability of reliable tools for modelling and evaluating the radio-communication between Reader and Tag within an RFID radio-link are needed. The paper discuss the impact of real environment (e.g. Electromagnetic Coupling, Multipath propagation) on system performance in terms of error-probability and received powers, showing some relevant effects and trade-offs in transponder and reader design
Piccolo è ancora bello? Ritratto di Pmi in Confindustria
No full textIl capitolo sviluppa un'analisi sulle diverse risposte alla crisi di un campione di piccole e medie imprese associate a Confindustria. Dopo una ricostruzione del dibattito sul ruolo della dimensione d'impresa nello sviluppo economico, vengono presi in esame diversi modelli competitivi di risposta alla crisi, con particolare riferimento ai processi di apertura internazionale, investimento in innovazione e posizionamento nella filiera. L'analisi si conclude con una lettura critica degli ostacoli alla crescita dimensionale interni ed esterni alle imprese
Autoimmune necrotizing myopathy and anti-Jo1 antibodies: A case of steroid responsive inflammatory myopathy
No full text
Efficacy of mud plus bath therapy as compared to bath therapy in osteoarthritis of hands and knees: a pilot single-blinded randomized controlled trial
No full textThe primary objective of this study was to assess the efficacy of mud plus bath therapy in comparison to bath therapy alone in hand and knee osteoarthritis (HOA and KOA). We conducted a single-blinded randomized controlled trial (RCT). Patients were randomly assigned to either mud plus bath therapy (group 1) or balneotherapy (group 2). The primary outcome was a change in AUSCAN questionnaire for HOA and in WOMAC for KOA at month 12. Evaluations were performed at baseline (B), immediately after the interventions (week 2, W2) and after 3 (M3), 6 (M6), 9 (M9) and 12 (M12) months. 37 patients with KOA and 52 with HOA were randomized in the study. In HOA patients, AUSCAN pain improved more in group 1 compared to group 2 at M3, M6 and M12 (p<0.001, p=0.001 and p=0.038, respectively). AUSCAN stiffness improved more in group 1 at M3 (p=0.001). AUSCAN function improved more at M3, M6, M9 and M12 (p=0.001, p=0.001, p=0.014 and p=0.018, respectively). Regarding, KOA, WOMAC function decreased more prominently in group 1 compared to group 2 at M9 (p=0.007). The absolute values of WOMAC function at M6 and M9 were lower in group 1 compared to group 2 (p=0.029 and p=0.001, respectively). WOMAC pain absolute values were lower in group 1 at W2 (p=0.044) and at M9 (p=0.08). We conducted a RCT on the efficacy of mud plus balneotherapy over balneotherapy alone in HOA and KOA. We found that mud plus balneotherapy was more effective than balneotherapy alone on clinical outcomes of HOA. Differences in clinical outcomes of KOA were not significant, yet numerically higher
Analytical Approach to the Backscattering from UHF RFID Transponder
No full textThe investigation of the modulated, back-scattered contribution from UHF RFID Transponders is a crucial issue for the reliable evaluation of the behaviour and the performance of RFID systems. The back-scattered, radiated field by a UHF Transponder is described by means of a simple and complete analytical expression. The Tag Radar Cross Section (RCS) and the Bit Error Rate (BER) at the Reader are evaluated by means of the achieved formula, and the results are in perfect agreement with previous available publications
Aging in Primary Systemic Vasculitis: Implications for Diagnosis, Clinical Manifestations, and Management
No full textAnti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV) usually affect adults and older populations. The well recognized clinical (i.e., granulomatosis with polyangiitis [GPA], microscopic polyangiitis, and eosinophilic GPA) and serological phenotypes (i.e., anti-MPO-ANCA, anti-PR3-ANCA and ANCA negative) within AAV differ substantially for clinical, demographic, and epidemiological features, including age at presentation. Whether and how aging could contribute to the clinical expression of these disease phenotypes is intriguing and still overlooked. In addition, despite being predominantly a disease of the elderly, most of the studies analyzing drug interventions and the clinical trials on AAV explicitly excluded older patients, limiting the understanding of the disease in this subset of patients. In elderly patients induced with cyclophosphamide, a lower dose of treatment for patients aged 60 years or older and with reduced renal function has been recommended. Giant cell arteritis (GCA) and Takayasu's arteritis (TAK) are two primary systemic vasculitides involving large vessels that differ in age at presentation, with GCA patients being at least 10 years older than TAK patients. Different treatment approaches are effective in these conditions. However, a few authors have suggested that they might be considered expressions of the same clinical syndrome, rather than two different diseases. Novel insights into the role of senescence-related immunological and vascular processes might help to interpret the link between these two conditions. Overall, the impact of aging on all these vasculitides is complex and not easy to analyze. So far, few studies focusing on this topic have been published. We reviewed data on the clinical presentation, epidemiology, therapy, and disease- and treatment-related complications in patients affected by these vasculitides, highlighting the differences in young versus elderly subjects
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