1,597 research outputs found
An optimised workflow for the interactive experience with cultural heritage through reality-based 3d models: Cases study in archaeological and urban complexes
The paper compares two workflows for the achievement of 3D models aimed at in-depth studies on the geometric features of
Cultural Heritage artefacts and their dissemination. The purpose is the outlining of pros and cons of different techniques coming
from entertainment and video games industry, starting from highly reliable 3D documentation of cultural assets, i.e.
architectural/archaeological/urban sites. Two different possible applications are described: (i) procedural modelling used for
understanding and visualising reconstruction hypotheses of the vaulted pavilions at Hadrian\u2019s Villa, Tivoli, Rome; (ii) optimisation
of 3D high-detailed models, as input files, turned into visual reliable and highly portable assets for game-engines. The first case
study is focussed on creating a flexible model for evalueting reconstruction hypotheses and supplying restorers with useful hints for
shape completion of ruined pavilions. The second case study makes available detailed digital contents for storytelling historical and
cultural events in an attractive way, as in the case of the urban explorative model of Chiuro, a small town in northern Italy
Interrelated changes in fluid sources and stress field orientation during the seismic cycle reconstructed for an exhumed analogue of the subduction megathrust shallow portion.
The colour of stones and mosaics in Ravenna: new images of ancient monuments using the latest generation of unconventional photogrammetry
[EN] This paper focuses on texture accuracy for a reliable simulation of construction materials present in some important historic monuments on the World Heritage List, dating back to Late Antiquity in Ravenna (Italy). A series of novel strategies will be explained in order to take advantage of automatic texturing solutions of 3D digital models created by Structure from Motion (SfM) applications. These monuments will be used as case studies toillustrate a shadow removal technique on Lambertian surfaces (stone, mortar, bricks, etc.) from apparent colour texture and a rapid approach for optic simulation of mosaic decoration. The latter consists of splitting a single apparent colour texture into a set of images whose purpose is to supply render engines more suitable shaders for representing coloured mosaic tiles in an optically reliable way[ES] El propósito de este trabajo es destacar el papel de la precisión de la textura para una representación fiable de los materiales presentes en algunos relevantes monumentos de Rávena (Italia), pertenecientes a la Lista del Patrimonio Mundial y que datan de la Antigüedad TardÃa. Una serie de estrategias se explicarán con el fin de aprovechar las ventajas de las soluciones automáticas de texturizado de modelos 3D creados con aplicaciones Structure from Motion (SfM). Estos edificios serán los casos de estudios para ilustrar una técnica innovadora para la eliminación de las sombras de la textura aparente del color y un método rápido para la simulación de decoración taraceadas de mosaico. Este último problema consiste en dividir una única textura en un conjunto de imágenes cuya finalidad es ofrecer a los motores de renderizado los shaders más adecuados para la representación en una forma ópticamente fiable de las teselas coloreadas de mosaicoCipriani, L.; Fantini, F.; Bertacchi, S. (2015). El color en las piedras y en los mosaicos de Rávena: nuevas imágenes de los monumentos antiguos a través de la fotogrametrÃa no convencional de última generación. EGA. Revista de Expresión Gráfica Arquitectónica. 20(26):190-201. doi:10.4995/ega.2015.4052SWORD1902012026Cipriani, L., Fantini, F., & Bertacchi, S. (2014). 3D models mapping optimization through an integrated parameterization approach: cases studies from Ravenna. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XL-5, 173-180. doi:10.5194/isprsarchives-xl-5-173-201
Cyclical stress drop and stress switching during brittle faulting on a shallow megathrust field analogue (Northern Apennines, Italy)
SIL1 deficiency causes degenerative changes of peripheral nerves and neuromuscular junctions in fish, mice and human.
BACKGROUND: Marinesco-Sjögren Syndrome (MSS) is a rare neuromuscular condition caused by recessive mutations in the SIL1 gene resulting in the absence of functional SIL1 protein, a co-chaperone for the major ER chaperone, BiP. As BiP is decisive for proper protein processing, loss of SIL1 results in the accumulation of misshaped proteins. This accumulation likely damages and destroys cells in vulnerable tissues, leading to congenital cataracts, cerebellar ataxia, vacuolar myopathy and other MSS phenotypes. Whether the peripheral nervous system (PNS) is affected in MSS has not been conclusively shown. METHODS: To study PNS vulnerability in MSS, intramuscular nerves fibres from MSS patients and from SIL1-deficient mice (woozy) as well as sciatic nerves and neuromuscular junctions (NMJ) from these mice have been investigated via transmission electron microscopic and immunofluorescence studies accompanied by transcript studies and unbiased proteomic profiling. In addition, PNS and NMJ integrity were analyzed via immunofluorescence studies in an MSS-zebrafish model which has been generated for that purpose. RESULTS: Electron microscopy revealed morphological changes indicative of impaired autophagy and mitochondrial maintenance in distal axons and in Schwann cells. Moreover, changes of the morphology of NMJs as well as of transcripts encoding proteins important for NMJ function were detected in woozy mice. These findings were in line with a grossly abnormal structure of NMJs in SIL1-deficient zebrafish embryos. Proteome profiling of sciatic nerve specimens from woozy mice revealed altered levels of proteins implicated in neuronal maintenance suggesting the activation of compensatory mechanisms. CONCLUSION: Taken together, our combined data expand the spectrum of tissues affected by SIL1-loss and suggest that impaired neuromuscular transmission might be part of MSS pathophysiology
STATO DI SALUTE DELLE POPOLAZIONI RESIDENTI NELLE AREE GEOTERMICHE DELLA TOSCANA
Objective The limited scientific knowledge on relationship between exposure and health effects in relation to geothermal activity motivated an epidemiologic investigation in Tuscan geothermal area. The study aims to describe the health status of populations living in Tuscany municipalities where concessions for exploitation of geothermal resources were granted. Design This is an ecological study, so it is not useful to produce evidence to sustain a judgment on the cause-effect link. The major limits of this type of study are the use of the residence at municipal level as a proxy of exposure to both environmental and socioeconomic factors and the use of aggregated data of health outcomes that can lead to the well-known ecological fallacy. Setting and participants Sixteen municipalities were included in the study area: eight are part of the so-called "traditional" geothermal area, defined as Northern Geothermal Area (NGA) and eight located in the Amiata Mountain defined as Southern Geothermal Area (SGA). In 2000-2006, the average resident population in the overall area was approximately 43,000 inhabitants. Thirty-one geothermal power plants were active, with a production capacity of 811 MW, 5 of them with 88 MW located in the SGA. Statistical analyses on the entire geothermal area, NGA and SGA subareas, and the sixteen municipalities were performed. Main outcome measures Mortality data were obtained from Tuscany Regional Mortality Registry for the 1971-2006 period, analysing 60 causes of death, of interest for population health status or consistent with "Project SENTIERI" criteria. Hospital discharge records of residents in Tuscany Region in 2004-2006, anywhere admitted to hospital, were analyzed considering only the main diagnosis, excluding repeated admissions for the same cause. The causes taken into account are the same analysed for mortality were considered. Age-standardized mortality rates (TSDM) and the temporal trends of TSDM for four periods (1971-1979, 1980- 1989, 1990-1999, 2000-2006) were computed. Age-standardized mortality/hospitalization ratios (SMR/SHR), with and without adjustment for the deprivation index based on 2001 census data, were calculated: mortality in the years 2000-2006 and hospitalization in 2004-2006. The expected number of events were computed using rates of residents in neighbouring municipalities (municipalities included in 50 km radius circle centred on the study area). Bayesian estimates of mortality/hospitalization ratios (BMR/BHR) at municipal level only and relating maps of the Bayesian risk estimators were elaborated. Congenital malformations (MC) were analysed using data from Tuscan Registry of Birth Defect in 1992-2006 period, relative to outcomes of pregnancies in women resident in the municipalities of study area, wherever the birth or termination of pregnancy occurred. The ratio between observed and expected cases (O/A), with expected defined according to regional rate, were calculated and O/A Bayesian estimates (BMR) are showed only at municipal level . The low weight and the males/females ratio at birth were analysed using data from Tuscany Birth Certificates, covering period 2001-2007, excluding biths occurred in facilities outside Tuscany Region. For Low birth weight (<2,500 grams), very low birth weight (<1,500 grams), low birth weight in women with normal gestational age or greater than 36 weeks, gestational age less than 36 weeks, and the frequency of males, the observed/expected ratio was calculated, with the expected number defined according to regional rate. Results Environmental background High levels of arsenic in drinking water distribution emerges as a critical element, so that several municipalities resorted to granting exemptions for the parameters laid down by the Legislative Decree in force (DLgs 31/01). However, during the final phase of the study, new blast systems activated in the SGA decreased the arsenic levels in the water supply, reaching values not requiring derogations, which, instead, are still effective in some NGA municipalities. Air quality data, from Tuscany Regional Agency for Environmental Protection-ARPAT, show that geothermal activities are able to affect air quality, especially with hydrogen sulphide in NGA, and hydrogen sulphide and mercury in SGA. A significant contribution to the presence of mercury in air is due to previous metallurgical sites. Although mercury levels are belowWHO guideline values, in SGA nearby Siena, values were significantly higher than in other geothermal areas, because of power plant PC2 (turned off in July 2011) in Piancastagnaio municipality. The hydrogen sulphide concentration levels were generally lower than WHO reference values, with occasional excesses over guideline value for health protection (150 μg/m3 as average of the 24 hours). Olfactory pollution was more critic with values exceeding 7-10 μg/m3 range even in areas without geothermal plants.Obiettivo Le limitate conoscenze scientifiche sui rapporti tra esposizione a fattori ambientali correlati all\u27attivit? geotermica e lo stato di salute della popolazione esposta hanno motivato la conduzione di una indagine epidemiologica nell\u27area geotermica toscana basata sull\u27analisi dei dati ambientali e sanitari disponibili negli archivi regionali. Lo studio ha lo scopo di descrivere lo stato di salute delle popolazioni residenti nelle aree geotermiche toscane, identificate con i territori comunali per i quali sono state rilasciate concessioni di sfruttamento della risorsa geotermica. Disegno Lo studio ? di tipo ecologico e quindi non adatto a produrre evidenze che permettano di esprimere un giudizio sul nesso causa-effetto. I maggiori limiti degli studi ecologici derivano dall\u27assunzione che la residenza anagrafica a livello comunale rappresenti una valida misura di esposizione a fattori sia ambientali sia socioeconomici e dall\u27utilizzo di dati aggregati degli esiti sanitari che possono portare a risultati affetti da fallacia ecologica. Setting e partecipanti I comuni inclusi nell\u27area geotermica dello studio sono 16, di cui 8 compresi nell\u27area geotermica cosiddetta ?tradizionale?, che include le localit? di Larderello, Val di Cornia e Radicondoli-Travale (area geotermica Nord) e gli altri 8 situati nella zona dell\u27Amiata senese e grossetana (area geotemica Sud). Nel periodo 2000-2006 la popolazione media residente nell\u27area geotermica complessiva era di oltre 43.000 abitanti. Al momento dello studio erano attive 31 centrali geotermoelettriche con capacit? di produzione di 811 MW, di cui 5 con 88 MW totali nell\u27area geotermica Sud. Le analisi statistiche sono state effettuate a livello di intera area geotermica, delle due subaree geotermiche (Nord e Sud) e dei 16 comuni. Principali misure di outcome La mortalit? ? stata analizzata utilizzando i dati del Registro di mortalit? regionale della Toscana per l\u27intero periodo disponibile (1971-2006), con dettaglio per 60 cause, scelte in quanto di interesse generale per il profilo di salute della popolazione o perch? coerenti con i criteri adottati dal Progetto SENTIERI. L\u27ospedalizzazione ? stata valutata analizzando i dati delle schede di dimissione ospedaliera (SDO) della Re-gione Toscana nel periodo 2004-2006, includendo i ricoverati residenti in Toscana ovunque abbiano effettuato un ricovero, considerando solo la diagnosi principale di ricovero, escludendo i ricoveri ripetuti degli stessi soggetti per la stessa causa. Le cause di ospedalizzazione selezionate per l\u27analisi dei ricoveri sono le stesse utilizzate per l\u27analisi della mortalit?. Per la mortalit? sono stati calcolati i tassi di mortalit? standardizzati per et? (TSDM) e i trend temporali dei TSDM in quattro periodi (1971- 1979, 1980-1989, 1990-1999, 2000-2006). Sia per la mortalit? del periodo 2000-2006, sia per l\u27ospedalizzazione del periodo 2004-2006,sono stati calcolati:  i rapporti di mortalit?/ospedalizzazione standardizzati per et? (SMR/SHR), con e senza aggiustamento per l\u27indice di deprivazione (ID), utilizzando per il calcolo dell\u27ID i dati del censimento 2001, con gli attesi calcolati usando il tasso di mortalit?/ospedalizzazione della popolazione residente nei comuni limitrofi (comuni con la coordinata geografica del municipio compresa in un cerchio con raggio di 50 km centrato sull\u27area in studio);  le stime bayesiane dei rapporti di mortalit? (BMR) e di ospedalizzazione (BHR) a livello esclusivamente comunale;  le mappe (disease mapping) dei rischi bayesiani di mortalit?/ospedalizzazione comunali. Le malformazioni congenite (MC) sono state analizzate utilizzando i dati del Registro toscano dei difetti congeniti (RTDC) nel periodo 1992-2006, relativi a esiti di gravidanze di donne residenti nei comuni dell\u27area in studio, ovunque sia avvenuto il parto o l\u27interruzione di gravidanza. Per le MC ? stato calcolato il rapporto tra casi osservati e casi attesi (O/A), con gli attesi definiti in base al tasso regionale e vengono fornite le stime bayesiane del rapporto O/A (BMR) a livello esclusivamente comunale. Per valutare il basso peso e il rapporto tra maschi e femmine alla nascita sono stati utilizzati i dati dei certificati di assistenza al parto della Regione Toscana, relativi al periodo 2001-2007, con esclusione degli eventi occorsi in presidi di altre regioni. L\u27analisi ? stata condotta considerando i nati con: basso peso alla nascita (LW: peso <2.500 grammi), bassissimo peso alla nascita (VLW: peso <1.500 grammi), basso peso alla nascita nelle donne con et? gestazionale normale e maggiore di 36 settimane (LW36), et? gestazionale inferiore a 36 settimane, e il numero di maschi osservato. Per tutti gli indicatori ? stato calcolato il rapporto osservato/atteso, con l\u27atteso definito in base al tasso regionale. Risultati Il contesto ambientale Dalla descrizione del contesto ambientale, per quanto riguarda l\u27acqua, emerge come elemento di criticit? il riscontro talvolta di elevati livelli di arsenico nelle acque della rete di distribuzione degli acquedotti, tanto che in diverse realt? comunali si ? dovuto far ricorso alla concessione di deroghe ai parametri previsti dal decreto legislativo vigente (DLgs 31/01). Comunque, durante la fase conclusiva dello studio, nell\u27area geotermica Sud i nuovi sistemi abbattitori hanno ridotto i livelli di arsenico nella rete idrica fino a valori tali da non dover pi? ricorrere alle deroghe, ancora attive, invece, in alcuni comuni dell\u27area geotermica Nord. Le informazioni dell\u27ARPAT sui dati dell\u27aria evidenziano che l\u27attivit? geotermica ? in grado di modificare la qualit? dell\u27aria, soprattutto per l\u27acido solfidrico nell\u27area geotermica Nord, e per l\u27acido solfidrico e il mercurio nell\u27area geotermica Sud, in particolare nel versante senese dell\u27Amiata. Per il mercurio nell\u27aria, un contributo rilevante ? legato anche alle emissioni dagli ex siti metallurgici. Sebbene i livelli di mercurio nelle postazioni di monitoraggio rientrino sempre al di sotto dei valori guida raccomandati dall\u27OMS, le concentrazioni riscontrate nell\u27aria dell\u27Amiata senese, e perlopi? legate alla centrale PC2 di Piancastagnaio (spenta nel luglio 2011), sono significativamente superiori a quelle rilevate nelle altre aree geotermiche che, al contrario, sono assestate sugli stessi livelli registrati nei territori non geotermici. I livelli di concentrazione di acido solfidrico sono inferiori ai valori di riferimento, con occasionali superamenti del valore guida di tutela sanitaria OMS (150 μg/m3 come media delle 24 ore). Pi? critici sono i dati di inquinamento olfattivo, che si verifica con il superamento del valore di 7-10 g/m3 di acido solfidrico nell\u27aria, riscontrato con vario grado di intensit? in tutte le postazioni di monitoraggio, anche in aree dove non sono presenti impianti geotermici. In alcune aree con insediamenti produttivi geotermici la frequenza, la persistenza e l\u27intensit? dei cattivi odori sono tali da comportare condizioni di qualit? dell\u27aria scadente
Low-dose oral imatinib in the treatment of systemic sclerosis interstitial lung disease unresponsive to cyclophosphamide: a phase II pilot study
Introduction: Pulmonary involvement represents a major cause of death of systemic sclerosis (SSc) patients. Recent data suggest that tyrosine kinase inhibitors, such as imatinib, may be a therapeutic option for SSc patients. However, preliminary published clinical trials were inconclusive about imatinib efficacy and showed side effects. The purpose of this study was to verify efficacy and tolerability of low-dose imatinib on interstitial lung disease in a cohort of SSc patients unresponsive to cyclophosphamide therapy.Methods: Thirty consecutive SSc patients with active pulmonary involvement, unresponsive to cyclophosphamide, were treated with imatinib 200 mg/day for 6 months followed by a 6-month follow-up. A "good response" was defined as an increase of forced vital capacity (FVC) by more of 15% and/or increase of diffusing capacity of carbon monoxide (DLCO) > 15% and PaO2 > 90% of initial value and high-resolution computed tomography (HRCT)-scan pattern unchanged or improved.Results: Twenty-six patients completed the study. Three patients died and one patient was lost to follow-up. Four patients (15.32%) had a good response, 7 worsened and 15 had a stabilized lung disease. Overall, 19 (73.07%) patients had an improved or stabilized lung disease. After a 6-month follow-up, 12 (54.5%) of the 22 patients showed an improved or stabilized lung disease.Conclusions: Lung function was stabilized in a large proportion of patients unresponsive to cyclophosphamide therapy and a beneficial outcome emerged from the analysis of HRCT lung scans. There was no significant improvement of skin involvement, and the low dose was well tolerated. These data provide useful suggestions to design future randomized clinical trials for SSc therapeutics
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