Search results for "TAU"
showing 10 items of 4585 documents
Il progetto I-Access, intreccio di competenze ed esperienze
2021
Questo contributo descrive il progetto INTERREG Italia-Malta 1/16, di cui il Dipartimento di Architettura è stato beneficiario. La proposta, nell’ambito disciplinare del restauro, mira a creare un percorso di azione-apprendimento da applicare nei quartieri storici di Palermo e La Valletta attuando un metodo di lavoro integrato e totalmente interdisciplinare. Il progetto riguarda l’accessibilità fisica, con la progettazione di interventi architettonici, la fornitura di strumenti tecnologici e informatici di supporto per un trasferimento più agevole, e l’accessibilità culturale, che si esprime nella “rete” di comunicazione virtuale per aree non facilmente raggiungibili, e una parallela attivi…
X-rays from accretion shocks in classical T Tauri stars: 2D MHD modeling and the role of local absorption
2013
AbstractIn classical T Tauri stars (CTTS) strong shocks are formed where the accretion funnel impacts with the denser stellar chromosphere. Although current models of accretion provide a plausible global picture of this process, some fundamental aspects are still unclear: the observed X-ray luminosity in accretion shocks is order of magnitudes lower than predicted; the observed density and temperature structures of the hot post-shock region are puzzling and still unexplained by models.To address these issues we performed 2D MHD simulations describing an accretion stream impacting onto the chromosphere of a CTTS, exploring different configurations and strengths of the magnetic field. From th…
UV variability and accretion dynamics in the young open cluster NGC 2264
2015
We explore UV and optical variability signatures for several hundred members of NGC 2264 (3 Myr). We performed simultaneous u- and r-band monitoring over two full weeks with CFHT/MegaCam. About 750 young stars are probed; 40% of them are accreting. Statistically distinct variability properties are observed for accreting and non-accreting cluster members. The accretors exhibit a significantly higher level of variability than the non-accretors, especially in the UV. The amount of u-band variability correlates statistically with UV excess in disk-bearing objects, which suggests that accretion and star-disk interaction are the main sources of variability. Cool magnetic spots, several hundred de…
UV And X-Ray Emission from Impacts of Fragmented Accretion Streams on Classical T Tauri Stars
2016
According to the magnetoshperic accretion scenario, during their evo- lution, Classical T Tauri stars accrete material from their circumstellar disk. The accretion process is regulated by the stellar magnetic eld and produces hot and dense post-shocks on the stellar surface as a result of impacts of the downfalling material. The impact regions are expected to strongly radiate in UV and X-rays. Several lines of evidence support the magnetospheric accretion scenario, especially in optical and infrared bands. However several points still remain unclear as, for instance,where the complex-pro le UV lines originate, or whether and how UV and X-ray emission is produced in the same shock region. Th…
Redshifted X-rays from the material accreting onto TW Hya: evidence of a low-latitude accretion spot
2017
High resolution spectroscopy, providing constraints on plasma motions and temperatures, is a powerful means to investigate the structure of accretion streams in CTTS. In particular, the accretion shock region, where the accreting material is heated to temperatures of a few MK as it continues its inward bulk motion, can be probed by X-ray spectroscopy. To attempt to detect for the first time the motion of this X-ray-emitting post-shock material, we searched for a Doppler shift in the deep Chandra/HETGS observation of the CTTS TW Hya. This test should unveil the nature of this X-ray emitting plasma component in CTTS, and constrain the accretion stream geometry. We searched for a Doppler shift…
Acu slimībām paredzēto preparātu aprites datu un to lietošanaas analīze piecās Ludzas aptiekās
2015
Visbiežākās acu slimības ir glaukoma, katarakta, konjunktivīts un sausās acs sindroms. Maģistra darba mērķis ir izpētīt acu slimībām paredzēto preparātu (recepšu, bezrecepšu medikamenti, uztura bagātinātāji) apriti un lietošanas tendences piecās Ludzas aptiekās no 01.2013 līdz 12.2014. Iegūtie dati norāda, ka 93% receptes izraksta oftalmologi un visbiežāk tie ir prostaglandīna analogi (latanoprostu). Kopumā bezrecepšu medikamenti sastādīja 79% no acu slimībām lietotajiem medikamentiem, kas norāda uz farmaceitu būtisko lomu un nepieciešamību šo preparātu pārzināšanā un korekta ieteikšanā pacientiem. Kā arī farmaceits ir otrā vietā pēc oftalmologa, kam pacients stāstā par acu problēmām (25%).…
WNT2 activation through proximal germline deletion predisposes to small intestinal neuroendocrine tumors and intestinal adenocarcinomas
2021
Abstract Many hereditary cancer syndromes are associated with an increased risk of small and large intestinal adenocarcinomas. However, conditions bearing a high risk to both adenocarcinomas and neuroendocrine tumors are yet to be described. We studied a family with 16 individuals in four generations affected by a wide spectrum of intestinal tumors, including hyperplastic polyps, adenomas, small intestinal neuroendocrine tumors, and colorectal and small intestinal adenocarcinomas. To assess the genetic susceptibility and understand the novel phenotype, we utilized multiple molecular methods, including whole genome sequencing, RNA sequencing, single cell sequencing, RNA in situ hybridization…
Translation and Validation of a Brief Health Literacy Instrument for School-Age Children in a Danish Context
2022
Low health literacy (HL) is associated with adverse health behaviors and poor health, and brief, high-quality instruments for measuring HL in children are scarce. The Health Literacy for School-Aged Children (HLSAC) instrument is a 10-item theory-based and internationally validated tool for measuring HL. The purpose of this study was to translate and validate the HLSAC instrument among Danish school-aged children. The instrument was translated into Danish by a standardized forward-backward translation process, and then pre-tested for face validity with 61 pupils from four schools. Thereafter, the instrument was tested among 805 pupils in grades 6 to 7 (age 11–14 years) from 15 schools. Whe…
Alfred Gotthold Meyer, Canova (Bielefeld-Leipzig, Velhagen & Klasing 1898), introduzione e traduzione in italiano a cura di Alexander Auf der Heyde, …
2014
Translation, comment and introduction to Alfred Gotthold Meyer's illustrated monograph "Canova" (Bielefeld-Leipzig 1898). This edition includes furthermore indexes and a critical catalogue of all graphic and photographical sources used for the autotypes.
Canova divulgato tra «Können» e «Wollen» nell’opera di Alfred Gotthold Meyer
2014
This article is a critical introduction to the Italian translation of Meyer's Canova monograph (1898), it focuses on the editorial process and on the use of photography during this early stage of popular art history. Further consideration is given to Meyer's critical point of view in the context of the German fin-de-siècle art discourse (Burckhardt, Springer, Bode, Wölfflin, Hildebrand).