Search results for "DWI"
showing 10 items of 529 documents
3.5-μm bandwidth mid-infrared supercontinuum generation in a 2-cm long suspended-core chalcogenide fiber
2014
A supercontinuum source extending from 0.6 to 4.1 µm has been successfully generated in a 2-cm long As2S3 chalcogenide suspended-core fiber by means of a nJ-level 200-fs pumping at 2.5 µm.
Inverse dispersion design in silicon waveguides
2014
We present a numerical tool to find the cross-section geometry of silicon-oninsulator waveguides that leads to a target dispersion profile. In < 10 iterations, we achieve geometries providing ultraflattened dispersion over 350 nm bandwidth.
Réactivité d'hydrures de tantalocène : insertion du soufre dans la liaison tantale-hydrogène
1997
Resume La recherche entreprise sur la reactivite des hydrures de tantalocene avec le soufre elementaire nous amene a la synthese de complexes monosoufres par une reaction d'insertion du soufre dans la liaison Ta-H. Des informations sont apportees sur le mecanisme de la formation de complexes a ligand (η2-S2) et la synthese du complexe Cp′2Ta(CO)(SH) est decrite.
Kilka uwag o historii klasztoru w Opolu-Czarnowąsach
2020
This article consists of two chapters. The first one presents an outline of the history of the convent in Czarnowąsy and objects of historical value situated therein. In the second chapter, the author mentions several issues related to the convent (which used to belong to the Norbertines) that still offer open fields for studies: the historical value of the short story “Uparte mniszki” by Zofia Kossak; Paweł Szotarewicz’s dedication to Baltazar Gerbert, the architect of the so-called House of Nuns; and the hypothetical visit of the then 29-year-old King Frederick the Great to this “House of God”.
Devianza, reazione sociale e sistemi di controllo. La lezione lemertiana
2019
Nel saggio si trattano i percorsi di ricerca di Edwin M. Lemert e la loro influenza su gran parte dei lavori successivi in tema di devianza, a partire dai lavori meno discussi nel nostro contesto accademico che trovano compimento e elaborazione matura in Devianza, problemi sociali e forme di controllo. Tenteremo di ricostruire il profilo intellettuale dello studioso, alcuni aspetti della sua biografia utili a delinearne lo sviluppo degli approcci e dei temi di ricerca e approfondiremo, in particolare, ricerche e analisi apparentemente “minori” che restituiscono alla figura di questo studioso una maggiore complessità. The essay discusses the research paths of Edwin M. Lemert and their influe…
Worldwide trends in diabetes since 1980: a pooled analysis of 751 population-based studies with 4·4 million participants
2016
Background One of the global targets for non-communicable diseases is to halt, by 2025, the rise in the agestandardised adult prevalence of diabetes at its 2010 levels. We aimed to estimate worldwide trends in diabetes, how likely it is for countries to achieve the global target, and how changes in prevalence, together with population growth and ageing, are aff ecting the number of adults with diabetes. Methods We pooled data from population-based studies that had collected data on diabetes through measurement of its biomarkers. We used a Bayesian hierarchical model to estimate trends in diabetes prevalence—defi ned as fasting plasma glucose of 7·0 mmol/L or higher, or history of diagnosis …
Worldwide trends in blood pressure from 1975 to 2015 : a pooled analysis of 1479 population-based measurement studies with 19·1 million participants
2017
Background Raised blood pressure is an important risk factor for cardiovascular diseases and chronic kidney disease. We estimated worldwide trends in mean systolic and mean diastolic blood pressure, and the prevalence of, and number of people with, raised blood pressure, defined as systolic blood pressure of 140 mm Hg or higher or diastolic blood pressure of 90 mm Hg or higher. Methods For this analysis, we pooled national, subnational, or community population-based studies that had measured blood pressure in adults aged 18 years and older. We used a Bayesian hierarchical model to estimate trends from 1975 to 2015 in mean systolic and mean diastolic blood pressure, and the prevalence of rai…
Sviluppo di un software per l’analisi di immagini di Diffusion Kurtosis Imaging
2013
L’analisi mediante RM del tensore di diffusione (Diffusion Tensor Imaging, DTI) consente di valutare anche in vivo e con modalità non invasive il processo di diffusione delle molecole d’acqua nei tessuti biologici. La peculiare organizzazione di alcuni tessuti biologici (es: muscoli, sostanza bianca del sistema nervoso centrale e tessuti ad alta cellularità) influenza tale fenomeno rendendolo anisotropo e quindi ben valutabile con tali tecniche di studio. Nonostante i grandi vantaggi di tale tecnica, il DTI è basato su un modello molto semplificato che assume che lo spostamento per diffusione segua un profilo gaussiano il che è molto raro in un ambiente variegato come i tessuti biologic…
Objective structured clinical examination in fundamentals of nursing and obstetric care as method of verification and assessing the degree of achieve…
2021
Cel pracy. Celem badania była (1) ocena stopnia przygotowania studentów pielęgniarstwa i położnictwa do egzaminu typu OSCE (Objective Structured Clinical Examination), (2) poznanie opinii studentów na temat egzaminowania w formie OSCE i (3) poznanie emocji towarzyszących egzaminowi.Materiał i metody. Zbadano 160 (53,33%) studentów kierunku pielęgniarstwo oraz 140 (46,67%) studentów kierunku położnictwo z 5 uczelni medycznych. Zastosowano metodę sondażu diagnostycznego i technikę ankietowania. Wykorzystano ankietę własną.Wyniki. Studenci najlepiej zostali przygotowani z zakresu wykonywania zabiegów higieniczno–pielęgnacyjnych (M=4,22, SD=0,85) a najsłabiej do wykonywania zabiegów na przewodz…
LE SEQUENZE T2-FLAIR E DWI NELLA DIAGNOSI DI ENCEFALOPATIA DI WERNICKE NON ALCOOL- CORRELATA
2013
SCOPO DEL LAVORO Valutare l’accuratezza delle immagini T2-FLAIR e DWI nello studio delle lesioni caratteristiche dell’Encefalopatia di Wernicke. MATERIALI E METODI Studio effettuato su donna di 56 anni, affetta da Encefalopatia di Wernicke non alcool-correlata. Nel Dicembre 2011 la paziente è stata sottoposta ad esame RM, utilizzando un tomografo operante a 1,5 T con acquisizione di scansioni sui piani assiale, sagittale e coronale in tecnica Spin-Echo (SE), Fast Spin-Echo (FSE), Fluid Attenuated Inversion Recovery (FLAIR) e Diffusion Weighted Imaging (DWI), con sequenze T1 e T2 pesate. L’esame è stato completato dopo infusione e.v. di m.d.c. paramagnetico. L’indagine mostrava la presenza…