Method for 3D modelling based on structure from motion processing of sparse 2D images

A method based on Structure from Motion for processing a plurality of sparse images acquired by one or more acquisition devices to generate a sparse 3D points cloud and of a plurality of internal and external parameters of the acquisition devices includes the steps of collecting the images; extracting keypoints therefrom and generating keypoint descriptors; organizing the images in a proximity graph; pairwise image matching and generating keypoints connecting tracks according maximum proximity between keypoints; performing an autocalibration between image clusters to extract internal and external parameters of the acquisition devices, wherein calibration groups are defined that contain a plurality of image clusters and wherein a clustering algorithm iteratively merges the clusters in a model expressed in a common local reference system starting from clusters belonging to the same calibration group; and performing a Euclidean reconstruction of the object as a sparse 3D point cloud based on the extracted parameters

Photosynthetic antenna size in higher plants is controlled by the plastoquinone redox state at the post-transcriptional rather than transcriptional level.

We analyze the effect of the plastoquinone redox state on the regulation of the light-harvesting antenna size at transcriptional and post-transcriptional levels. This was approached by studying transcription and accumulation of light-harvesting complexes in wild type versus the barley mutant viridis zb63, which is depleted in photosystem I and where plastoquinone is constitutively reduced. We show that the mRNA level of genes encoding antenna proteins is almost unaffected in the mutant; this stability of messenger level is not a peculiarity of antenna-encoding genes, but it extends to all photosynthesis-related genes. In contrast, analysis of protein accumulation by two-dimensional PAGE shows that the mutant undergoes strong reduction of its antenna size, with individual gene products having different levels of accumulation. We conclude that the plastoquinone redox state plays an important role in the long term regulation of chloroplast protein expression. However, its modulation is active at the post-transcriptional rather than transcriptional level

Removal Of Reactive Black 5 From Textile Wastewater By Ozone And Photo-Fenton: Influence Of Indusrial Matrix Effects

Textile waste water containing dyes, surfactants, salts and other contaminants represent a challenge for the selection and design of treatment processes due to the stability of some of its compo-nents. Advanced oxidation processes (AOPs) are at-tractive alternatives to partially or totally degrade dyes and other persistent pollutants using relatively compact devices to perform water treatment. To test the efficiency of these technologies it is necessary to count with laboratory made solutions that can match the characteristics of a typical textile waste waters ef-fluent. In this work the application of two AOP, ozo-nation and photo-Fenton, to the treatment of textile effluents are compared, using a specially design model solution. The effect of typical textile wastewater com-position on the treatment efficiency is discussed. Higher decoloration efficiencies were obtained with both AOPs tested in this work, being slightly higher with ozonation. TOC was only partially removed, be-ing more efficient photo-Fenton than ozonation.Fil: Hanela, Sergio Daniel. Instituto Nacional del Agua. Gerencia de Programas y Proyectos. Centro de Tecnologia del Uso del Agua.; ArgentinaFil: Fantoni, Sofía. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Cainzos, Verónica Jorgelina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Ávalos, J.I.. Instituto Nacional del Agua. Gerencia de Programas y Proyectos. Centro de Tecnologia del Uso del Agua.; ArgentinaFil: Diaz, S.N.. Instituto Nacional del Agua. Gerencia de Programas y Proyectos. Centro de Tecnologia del Uso del Agua.; ArgentinaFil: Romero, E.. Instituto Nacional del Agua. Gerencia de Programas y Proyectos. Centro de Tecnologia del Uso del Agua.; ArgentinaFil: Vezzoni, A.I.. Instituto Nacional del Agua. Gerencia de Programas y Proyectos. Centro de Tecnologia del Uso del Agua.; ArgentinaFil: Candal, Roberto Jorge. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaFil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentin

Laser remote sensing calibration of ocean color satellite data

world ocean: in fact, those processes dramatically affect the climatic equilibrium of our planet. For this reason, many advanced active and passive remote sensors have been used to study phytoplankton dynamics, since such phenomena are thought to be responsible for the sequestration of atmospheric carbon dioxide, one of the most important greenhouse gases. In this paper, one laser system and three satellite radiometers routinely used for the study of the phytoplankton dynamics will be briefly reviewed. Satellite sensors have been preferred to airborne sensors because, to our knowledge, ocean color airborne radiometers have not been operated in Antarctica, at least not throughout the whole lapse of time examined in this study. Particular focus was on the laser system (ELF) and on a specific satellite radiometer (SeaWiFS). ELF is based on the laser-induced fluorescence of phytoplankton pigments and was conceived for the Italian expeditions to Antarctica. The goal of SeaWiFS is to provide the Earth science community with quantitative data on the global ocean bio-optical properties. Such satellite radiometer has been calibrated with in situ data mainly acquired in non polar regions. This is why a comparison between ELF and SeaWiFS measurements of chlorophyll-a surface concentrations in the Southern Ocean during the austral summer 1997-1998 was believed to be significant. Our results indicate that SeaWiFS overestimates high concentrations and underestimates low concentrations. In order to correct this behavior, the chlorophyll- a bio-optical algorithm of SeaWiFS has been recalibrated according to the measurements of ELF, thus providing a new estimation of the primary production in the Southern Ocean

Models of hospital care during COVID-19 pandemic in Italy: results from a survey of physicians

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Dichiarazione ICRP sulle reazioni tissutali ed effetti immediati e tardivi delle radiazioni nei tessuti e negli organi normali - Dosi soglia per le reazioni tissutali nell’ambito della radioprotezione

La pubblicazione ICRP 118 riesamina gli effetti precoci e tardivi delle radiazioni ionizzanti nei diversi organi ed apparati e fornisce stime aggiornate sulle dosi soglia per l'induzione delle numerose reazioni tissutali analizzate. In particolare, a seguito dei progressi nelle conoscenze radiobiologiche e cliniche, pubblicati in numerosi testi specialistici, vengono dettagliatamente presentate le evidenze che hanno condotto alle modificazioni, rispetto alle Raccomandazioni ICRP 103/2007, nella individuazione delle dosi soglia per la induzione della cataratta e delle patologie del sistema circolatorio da parte delle radiazioni ionizzanti. A queste rilevanti considerazioni si affiancano gli approfonditi aggiornamenti sulle conoscenze radiobiologiche e cliniche e le integrazioni delle dosi soglia, individuate in modo più articolato rispetto alle precedenti pubblicazioni, per tutte le altre reazioni tissutali, che rendono questo documento un indispensabile strumento di lavoro e di analisi per tutti coloro che si occupano di radioprotezione, con particolare riferimento agli specialisti di radioprotezione medica. La traduzione in italiano dell’intero testo vuole facilitare la diffusione delle peculiari informazioni contenute nella pubblicazione e motivare una sempre più approfondita ricerca in questo settore che indubbiamente contribuisce a ridurre i rischi derivanti dall’esposizione alle radiazioni ionizzanti. La realizzazione della versione italiana di questa pubblicazione ha richiesto un notevole impegno qualitativo e quantitativo ed è stata possibile per il considerevole e qualificante contributo dei medici dell’AIRM e dei membri del Comitato Internazionale dell'AIRP. A tutti coloro che hanno collaborato alla sua traduzione, revisione e pubblicazione con notevole spirito di sacrificio, è rivolto l'apprezzamento e la riconoscenza delle nostre Associazioni, che riuniscono gli operatori attivi nei vari settori di interesse della radioprotezione

New classification for the treatment of pyogenic spondylodiscitis: validation study on a population of 250 patients with a follow-up of 2 years

Purpose: Pyogenic spondylodiscitis (PS) is still burdened by a high rate of orthopedic and neurological complications. Despite the rising incidence, the choice of a proper orthopedic treatment is often delayed by the lack of clinical data. The aim of this study was to propose a clinical-radiological classification of pyogenic spondylodiscitis to define a standard treatment algorithm. Methods: Based on data from 250 patients treated from 2008 to 2015, a clinical-radiological classification of pyogenic spondylodiscitis was developed. According to primary classification criteria (bone destruction or segmental instability, epidural abscesses and neurological impairment), three main classes were identified. Subclasses were defined according to secondary criteria. PS without segmental instability or neurological impairment was treated conservatively. When significant bone loss or neurological impairment occurred, surgical stabilization and/or decompression were performed. All patients underwent clinical and radiological 2-year follow-up. Results: Type A PS occurred in 84 patients, while 46 cases were classified as type B and 120 as type C. Average time of hospitalization was 51.94 days and overall healing rate was 92.80%. 140 patients (56.00%) were treated conservatively with average time of immobilization of 218.17 ± 9.89 days. Both VAS and SF-12 scores improved across time points in all classes. Residual chronic back pain occurred in 27 patients (10.80%). Overall observed mortality was 4.80%. Conclusions: Standardized treatment of PS is highly recommended to ensure patients a good quality of life. The proposed scheme includes all available orthopedic treatments and helps spine surgeons to significantly reduce complications and costs and to avoid overtreatment

I.S.Mu.L.T. Achilles Tendon Ruptures Guidelines

This work provides easily accessible guidelines for the diagnosis, treatment and rehabilitation of Achilles tendon ruptures. These guidelines could be considered as recommendations for good clinical practice developed through a process of systematic review of the literature and expert opinion, to improve the quality of care for the individual patient and rationalize the use of resources. This work is divided into two sessions: 1) questions about hot topics; 2) answers to the questions following Evidence Based Medicine principles. Despite the frequency of the pathology andthe high level of satisfaction achieved in treatment of Achilles tendon ruptures, a global consensus is lacking. In fact, there is not a uniform treatment and rehabilitation protocol used for Achilles tendon ruptures