9 research outputs found
Artificial quantum confinement in LAO3/STO heterostructure
Heterostructures of transition metal oxides (TMO) perovskites represent an
ideal platform to explore exotic phenomena involving the complex interplay
between the spin, charge, orbital and lattice degrees of freedom available in
these compounds. At the interface between such materials, this interplay can
lead to phenomena that are present in none of the original constituents such as
the formation of the interfacial 2D electron system (2DES) discovered at the
LAO3/STO3 (LAO/STO) interface. In samples prepared by growing a LAO layer onto
a STO substrate, the 2DES is confined in a band bending potential well, whose
width is set by the interface charge density and the STO dielectric properties,
and determines the electronic band structure. Growing LAO (2 nm) /STO (x
nm)/LAO (2 nm) heterostructures on STO substrates allows us to control the
extension of the confining potential of the top 2DES via the thickness of the
STO layer. In such samples, we explore the dependence of the electronic
structure on the width of the confining potential using soft X-ray ARPES
combined with ab-initio calculations. The results indicate that varying the
thickness of the STO film modifies the quantization of the 3d t2g bands and,
interestingly, redistributes the charge between the dxy and dxz/dyz bands
Death and the Societies of Late Antiquity
Ce volume bilingue, comprenant un ensemble de 28 contributions disponibles en français et en anglais (dans leur version longue ou abrĂ©gĂ©e), propose dâĂ©tablir un Ă©tat des lieux des rĂ©flexions, recherches et Ă©tudes conduites sur le fait funĂ©raire Ă lâĂ©poque tardo-antique au sein des provinces de lâEmpire romain et sur leurs rĂ©gions limitrophes, afin dâouvrir de nouvelles perspectives sur ses Ă©volutions possibles. Au cours des trois derniĂšres dĂ©cennies, les transformations considĂ©rables des mĂ©thodologies dĂ©ployĂ©es sur le terrain et en laboratoire ont permis un renouveau des questionnements sur les populations et les pratiques funĂ©raires de lâAntiquitĂ© tardive, pĂ©riode marquĂ©e par de multiples changements politiques, sociaux, dĂ©mographiques et culturels. Lâapparition de ce qui a Ă©tĂ© initialement dĂ©signĂ© comme une « Anthropologie de terrain », qui fut le dĂ©but de la dĂ©marche archĂ©othanatologique, puis le rĂ©cent dĂ©veloppement dâapproches collaboratives entre des domaines scientifiques divers (archĂ©othanatologie, biochimie et gĂ©ochimie, gĂ©nĂ©tique, histoire, Ă©pigraphie par exemple) ont Ă©tĂ© dĂ©cisives pour le renouvellement des problĂ©matiques dâĂ©tude : rĂ©vision dâanciens concepts comme apparition dâaxes dâanalyse inĂ©dits. Les recherches rassemblĂ©es dans cet ouvrage sont articulĂ©es autour de quatre grands thĂšmes : lâĂ©volution des pratiques funĂ©raires dans le temps, lâidentitĂ© sociale dans la mort, les ensembles funĂ©raires en transformation (organisation et topographie) et les territoires de lâempire (du cĆur aux marges). Ces Ă©tudes proposent un rĂ©examen et une rĂ©vision des donnĂ©es, tant anthropologiques quâarchĂ©ologiques ou historiques sur lâAntiquitĂ© tardive, et rĂ©vĂšlent, Ă cet Ă©gard, une mosaĂŻque de paysages politiques, sociaux et culturels singuliĂšrement riches et complexes. Elles accroissent nos connaissances sur le traitement des dĂ©funts, lâemplacement des aires funĂ©raires ou encore la structure des sĂ©pultures, en rĂ©vĂ©lant une diversitĂ© de pratiques, et permettent au final de relancer la rĂ©flexion sur la maniĂšre dont les sociĂ©tĂ©s tardo-antiques envisagent la mort et sur les Ă©lĂ©ments permettant dâidentifier et de dĂ©finir la diversitĂ© des groupes qui les composent. Elles dĂ©montrent ce faisant que nous pouvons vĂ©ritablement apprĂ©hender les structures culturelles et sociales des communautĂ©s anciennes et leurs potentielles transformations, Ă partir de lâĂ©tude des pratiques funĂ©raires.This bilingual volume proposes to draw up an assessment of the recent research conducted on funerary behavior during Late Antiquity in the provinces of the Roman Empire and on their borders, in order to open new perspectives on its possible developments. The considerable transformations of the methodologies have raised the need for a renewal of the questions on the funerary practices during Late Antiquity, a period marked by multiple political, social, demographic and cultural changes. The emergence field anthropology, which was the beginning of archaeothanatology, and then the recent development of collaborative approaches between various scientific fields (archaeothanatology, biochemistry and geochemistry, genetics, history, epigraphy, for example), have been decisive. The research collected in this book is structured around four main themes: Evolution of funerary practices over time; Social identity through death; Changing burial grounds (organisation and topography); Territories of the Empire (from the heart to the margins). These studies propose a review and a revision of the data, both anthropological and archaeological or historical on Late Antiquity, and reveal a mosaic of political, social, and cultural landscapes singularly rich and complex. In doing so, they demonstrate that we can truly understand the cultural and social structures of ancient communities and their potential transformations, based on the study of funerary practices
Grotta di Pozzo (AQ): la sequenza stratigrafica e lâindustria dellâEpigravettiano antico
Tra memoria dell'antico e identitĂ culturale tempi e protagonisti della scoperta dei monti Lepini
GROTTA DI POZZO, AN EARLY EPIGRAVETTIAN SITE OF THE LGM IN THE MOUNTAINS OF CENTRAL ITALY
RĂ©sumĂ©: Grotta di Pozzo, qui sâouvre Ă moyenne altitude dans le cĆur de lâApennin, Ă 710m snm et Ă 42° de latitude Nord, sur le bord dâun lac aujourdâhui assĂ©chĂ©, est entourĂ©e de montagnes hautes plus de 2000m. La sĂ©quence archĂ©ologique commence vers 23ka cal BP, dĂšs que les eaux du lac, qui venait dâatteindre son maximum, se retirent de la grotte. Des groupes humains porteurs dâindustrie de lâEpigravettien ancien Ă pointes Ă cran exploitent au fil des saisons un milieu naturel steppique, oĂč les ressources offerte par le lac se couplent Ă celles des proches lieux de chasse estivale en montagne. La recolonisation prĂ©coce de cette partie interne de lâApennin sâexplique par ce milieu favorable, ainsi que, probablement, par des changements dans les territoires de chasse Ă plus basse altitude, dus Ă la progressive disparition de la grande plaine adriatique. Plus tard, entre 15,5 et 14,5 cal BP, lâoccupation de la grotte se fera plus intense, avec production dâindustrie lithique de lâEpigravettien final
Parosmia assessment with structured questions and its functional impact in patients with long-term COVID-19-related olfactory dysfunction
11siOlfactory dysfunction (OD) is one of the most common symptoms of acute and long-COVID-19. QualitativeOD frequently accompanies or follows quantitative olfactory loss . Limited studies to date have combinedboth qualitative and quantitative evaluation of OD . The aim of this study was to estimate the prevalence of qualitative OD and evaluate its functional impact in post-COVID-19 patients by combining a validated questionnaire and a comprehensive olfactory psychophysical evaluation.noneopenBoscolo-Rizzo, Paolo; Hopkins, Claire; Menini, Anna; Dibattista, Michele; Cancellieri, Emilia; Gardenal, Nicoletta; Tofanelli, Margherita; Valentinotti, Romina; Lechien, Jerome R; Vaira, Luigi Angelo; Tirelli, GiancarloBoscolo-Rizzo, Paolo; Hopkins, Claire; Menini, Anna; Dibattista, Michele; Cancellieri, Emilia; Gardenal, Nicoletta; Tofanelli, Margherita; Valentinotti, Romina; Lechien, Jerome R; Vaira, Luigi Angelo; Tirelli, Giancarl
Estimating minimum adult HIV prevalence: A cross-sectional study to assess the characteristics of people living with HIV in Italy
In 2012, we conducted a retrospective cross-sectional study to assess the number of people living with HIV linked to care and, among these, the number of people on antiretroviral therapy. The health authority in each of the 20 Italian Regions provided the list of Public Infectious Diseases Clinics providing antiretroviral therapy and monitoring people with HIV infection. We asked every Public Infectious Diseases Clinic to report the number of HIV-positive people diagnosed and linked to care and the number of those on antiretroviral therapy during 2012. In 2012, 94,146 people diagnosed with HIV and linked to care were reported. The majority were males (70.1%), Italians (84.4%), and aged between 25 and 49 years (63.4%); the probable route of transmission was heterosexual contact in 37.5% of cases, injecting drug use in 28.1%, and male-to-male contact in 27.9%. Among people in care, 20.1% had less than 350 CD4 cells/ÎŒl, 87.6% received antiretroviral therapy, and among these, 62.4% had a CD4 cell count higher than 350 cells/ÎŒl. The overall estimated prevalence of individuals diagnosed and linked to care in 2012 in Italy was 0.16 per 100 residents (all ages). Adding the estimated proportion of undiagnosed people, the estimated HIV prevalence would range between 0.19 and 0.26 per 100 residents. In Italy, the majority of people diagnosed and linked to care receive antiretroviral therapy. A higher prevalence of individuals diagnosed and linked to care was observed in Northern Italy and among males. More information for developing the HIV care continuum is necessary to improve the entire engagement in care, focusing on test-and-treat strategies to substantially reduce the proportion of people still undiagnosed or with a detectable viral load