133 research outputs found
Behavioral modeling of GaN-based power amplifiers: impact of electrothermal feedback on the model accuracy and identification
No full textIn this article, we discuss the accuracy of behavioral models in simulating the intermodulation distortion (IMD) of microwave GaN-based high-power amplifiers in the presence of strong electrothermal (ET) feedback. Exploiting an accurate self-consistent ET model derived from measurements and thermal finite-element method simulations, we show that behavioral models are able to yield accurate results, provided that the model identification is carried out with signals with wide bandwidth and large dynamics
Editorial: Image-based computational approaches for personalized cardiovascular medicine: improving clinical applicability and reliability through medical imaging and experimental data
No full textMedical Instruments & Bio-Inspired Technolog
Degree of irrationality of a very general Abelian variety
No full textConsider a very general abelian variety of dimension at least and an integer . We show that if the map has a -dimensional fiber then . This extends results of the second-named author which covered the cases . As a geometric application, we prove that any dominant rational map from a very general abelian -fold to has degree at least for , thus improving results of Alzati and the last-named author in the case of a very general abelian variety
Elastography Evaluation of Benign Thyroid Nodules in Patients Affected by Hashimoto’s Thyroiditis
No full textThe aim of the present prospective study was to evaluate the predictive value of elastography in benign thyroid nodules of patients affected by Hashimoto’s thyroiditis (HT). From January 2011 to January 2012, 242 nodules in patients affected by HT were submitted to fine needle aspiration cytology (FNAC). All of the patients underwent sonography and elastography performed before FNAC. 230 (95%) nodules were benign, 8 papillary cancers, and 4 follicular lesions. Score 1 was found in 79.1% of benign lesions (sensitivity 79.1%; specificity 66.7%; PPV 97.8%; NPV 14.3%; accuracy 78.5%; p<0.05). In order to evaluate the outcome of thyroid ultrasound echogenicity in relation to elastography features of nodule(s), all the patients with benign nodules were stratified according to their hypoechoic pattern of thyroid (mild-moderate and severe). Following stratification score 1 was found in 84.2% of benign nodules (sensitivity 75.0%; specificity 88.9%; PPV 27.3%; NPV 98.4%; accuracy 88.2%; p<0.0001) of patients with a mild-moderate ultrasound thyroid hypoechogenicity, whereas it was found in 60% of benign nodules (p=0.715) of patients with a marked thyroid hypoechogenicity. Elastography appears to have limited value in detecting thyroid cancer in patients affected by Hashimoto’s thyroiditis with severe hypoechoic thyroid tissue
Levotiroxina soluzione liquida vs compresse nel trattamento dell’ipotiroidismo in gravidanza
No full textLevothyroxine liquid solution versus tablet form for replacement treatment in pregnant women
No full textErratum: OncoScore: a novel, Internet-based tool to assess the oncogenic potential of genes
No full textScientific Reports 7: Article number: 46290; published online: 07 April 2017; updated: 22 May 2017 The original version of this Article incorrectly listed all author names in reverse. The author list now reads: Rocco Piazza, Daniele Ramazzotti, Roberta Spinelli, Alessandra Pirola, Luca De Sano, Pierangelo Ferrari, Vera Magistroni, Nicoletta Cordani, Nitesh Sharma & Carlo Gambacorti-Passerini.</jats:p
Thyroid hormonal profile in elderly patients treated with two different levothyroxine formulations: A single institute survey
No full text
Subcanonical points on projective curves and triply periodic minimal surfaces in the Euclidean space
No full textA point p on a smooth complex projective curve C of genus g ≥ 3 is subcanonical if the divisor (2g-2)p is canonical. The subcanonical locus in the moduli space M_{g,1} described by pairs (C,p) as above has dimension 2g-1 and consists of three irreducible components. Apart from the hyperelliptic component, the other two components depend on the parity of h^0(C,(g-1)p), and their general points satisfy h^0(C,(g-1)p)=1 and 2, respectively. In this paper, we study the subloci of pairs (C,p) such that h^0(C,(g-1)p) ≥ r+1 and h^0(C,(g-1)p) has the same parity as r+1, for some non-negative integer r. In particular, we provide a lower bound on their dimension, and we prove its sharpness for r ≤ 3. As an application, we further give an existence result for triply periodic minimal surfaces immersed in the 3-dimensional Euclidean space, completing a previous result of the second author
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