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Search Results: 1 - 10 of 167594 matches for " E. Meroni "
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Delineation of burnt mountain forest areas by high-resolution satellite images
De Matteo E,Colombo R,Meroni M,Comini B
Forest@ , 2007,
Abstract: In this paper we present a remote sensing technique, based on very high spatial resolution Quickbird satellite data, aimed to map burnt forested areas located in alpine environment hit by winter fires occurred in Lombardia Region in the 2005 year. Quickbird satellite images have a spatial resolution of 2.5 m and are characterized by 4 spectral bands covering the regions of blue, green, red and near infrared. Burnt areas were automatically extracted by using an object oriented classification combined with a connectivity algorithm developed with the aim to join burnt isolates pixel with the main body of the area hit by fire. The proposed algorithm is based on the exploitation of a Gaussian function that produces a degree of membership to be burnt for every pixel not classified as burnt by means of the preliminary automatic classification. The membership function is established on the base of the spatial distance and it decrease according the full width at half maximum of the Gaussian function. The produced maps have been compared with the burnt area boundaries obtained by means of field survey based on GPS measurements; this allowed us to estimate the goodness of the proposed method. The comparison between the results produced by the connectivity algorithm and the reference measured in ground showed high degrees of accuracy with errors ranging from 3 to 20%.
Performance of a large limited streamer tube cell in drift mode
G. Battistoni,M. Caccia,R. Campagnolo,C. Meroni,E. Scapparone
Physics , 2001, DOI: 10.1016/S0168-9002(01)00940-8
Abstract: The performance of a large (3x3 $cm^2$) streamer tube cell in drift mode is shown. The detector space resolution has been studied using cosmic muons crossing an high precision silicon telescope. The experimental results are compared with a GARFIELD simulation.
Anti-inflammatory activity of statins: potential use in the anti-phospholipid syndrome
PL Meroni
Arthritis Research & Therapy , 2001, DOI: 10.1186/ar160
Abstract: ADM expression was evaluated by a cell ELISA. EC were incubated with human recombinant (hr) IL-1β (50 U/ml), hr TNFα (10 ng/ml), LPS (20 ng/ml) or with human anti-β2GPI antibodies (100 μg/ml) for 4 hr for E-Selectin expression and for 20 hr for ICAM-1 evaluation. Cytokine production was investigated by using the RiboQuant?in vitro transcription assay to measure IL-6 mRNA expression. As control, EC monolayers were incubated with irrelevant monoclonal or polyclonal antibodies or medium alone. The same experiments were carried out with EC monolayers pre-incubated overnight with fluvastatin or simvastatin (1-10 μM) in the absence or presence of mevalonate (100 μM). E-Selectin specific NFκB expression was also evaluated by the gel-shift assay.Both statins inhibited in a concentration dependent-manner the ADM expression induced by anti-β2GPI antibodies as well as those induced by the other agonists, being fluvastatin more efficient than simvastatin. Fluvastatin also down-regulated the mRNA expression specific for IL-6 and significantly inhibited E-Selectin NFκB DNA-binding. The simultaneous addition of meval-onate to fluvastatin completely prevented the drug inhibitory effect.These data demonstrates for the first time that statins (and particularly fluvastatin) are able to inhibit an endothelial pro-adhesive and pro-inflammatory phenotype induced by different stimuli including anti-β2GPI antibodies or pro-inflammatory cytokines. Altogether these findings suggest a potential usefulness for statins in the prevention of the APS pro-atherothrombotic state.
Screening for toxoplasmosis during pregnancy: one-year experience in an Italian reference laboratory = Triagem para toxoplasmose na gesta o: um ano de experiência em um laboratório de referência italiano
Meroni, Valeria,Genco, Francesca
Scientia Medica , 2010,
Abstract: AIMS: To describe the experience of the Toxoplasmosis Laboratory of Infectious Disease Department University of Pavia, IRCCS Foundation, San Matteo Polyclinic Pavia, a reference laboratory for diagnosis of toxoplasmosis, in the investigation of pregnant women with suspected acute toxoplasmosis. METHODS: All sera were tested with LIAISON Toxo IgM and IgG II, Toxo IgG Avidity II kits (DiaSorin, Saluggia, Italy), VIDAS Toxo IgG II and Toxo IgG Avidity (bioMérieux, Marcy l’Etoile, France ), IgM ISAGA (bioMérieux, Marcy l’Etoile, France) and ETI-TOXOK-A reverse PLUS (DiaSorin, Saluggia, Italy). When required (IgG negative/IgM positive women), IgG/IgM Western Blot II (LDBio, Lyon, France) was also performed. Prenatal diagnosis on amniotic fluid was done by nested PCR. All newborns were followed up to one year of age in order to exclude or confirm the diagnosis of congenital toxoplasmosis. All pregnant women with acute or undetermined stages of infection were treated. RESULTS: In the course of 2007, 236 women with suspected acute (IgM-positive) Toxoplasma infection were followed up. In the reference laboratory, 91 women had test results indicating acute toxoplasmosis, and 10 had undetermined status of infection. These 101 patients represented 42. 8% of the 236 women referred. Acute toxoplasmosis could be excluded in the remaining 135 patients, of whom 53 were non-immune. Three infected newborns were observed, all from mothers tested for the first time during the third trimester of pregnancy. CONCLUSIONS: The role of a reference laboratory in suspected toxoplasmosis acquired during pregnancy is crucial to date the infection and discriminate between seroconversion and false positive anti-Toxoplasma IgM antibodies. This avoids unnecessary anxiety in immune women, provides correct counseling about primary prevention and periodic testing for seronegative ones, and allows early treatment and follow-up of pregnant women with acute infection and their newborns.
Evaluation of splanchnic oximetry, Doppler flow velocimetry in the superior mesenteric artery and feeding tolerance in very low birth weight IUGR and non-IUGR infants receiving bolus versus continuous enteral nutrition
Valentina Bozzetti, Giuseppe Paterlini, Valeria Meroni, Paola DeLorenzo, Diego Gazzolo, Frank Van Bel, Gerard HA Visser, MariaGrazia Valsecchi, Paolo E Tagliabue
BMC Pediatrics , 2012, DOI: 10.1186/1471-2431-12-106
Abstract: In literature there is no consensus regarding the impact of enteral feeding on intestinal blood flow and hence regarding the best regimen and the best rate of delivering the enteral nutrition.This is a randomized, non-pharmacological, single-center, cross-over study including 20 VLBW infants.Inclusion criteria* Weight at birth ranging: 700–1501 grams* Gestational age up to 25?weeks and 6?days* Written informed consent from parents or guardiansExclusion criteria* Major congenital abnormality* Patients enrolled in other trials* Significant multi-organ failure prior to trial entry* Pre-existing cutaneous disease not allowing the placement of the NIRS’ probeIn the first 24 hours of life, between the 48th and 72nd hours of life, and during Minimal Enteral Feeding, all infants’ intestinal perfusion will be evaluated with NIRS and a Doppler of the superior mesenteric artery will be executed.At the achievement of an enteral intake of 100?mL/Kg/day the patients (IUGR and NON IUGR separately) will be randomized in 2 groups: Group A (n=10) will receive a feed by bolus (in 10 minutes); then, after at least 3 hours, they will receive the same amount of formula administered in 3 hours. Group B (n=10) will receive a feed administered in 3 hours followed by a bolus administration of the same amount of formula (in 10 minutes) after at least 3 hours.On the randomization day intestinal and cerebral regional oximetry will be measured via NIRS. Intestinal and celebral oximetry will be measured before the feed and 30 minutes after the feed by bolus during the 3 hours nutrition the measurements will be performed before the feed, 30 minutes from the start of the nutrition and 30 minutes after the end of the gavage. An evaluation of blood flow velocity of the superior mesenteric artery will be performed meanwhile. The infants of the Group A will be fed with continuous nutrition until the achievement of full enteral feeding. The infants of the Group B will be fed by bolus until the achieveme
Remote sensing-based estimation of gross primary production in a subalpine grassland
M. Rossini, S. Cogliati, M. Meroni, M. Migliavacca, M. Galvagno, L. Busetto, E. Cremonese, T. Julitta, C. Siniscalco, U. Morra di Cella,R. Colombo
Biogeosciences (BG) & Discussions (BGD) , 2012,
Abstract: This study investigates the performances in a terrestrial ecosystem of gross primary production (GPP) estimation of a suite of spectral vegetation indexes (VIs) that can be computed from currently orbiting platforms. Vegetation indexes were computed from near-surface field spectroscopy measurements collected using an automatic system designed for high temporal frequency acquisition of spectral measurements in the visible near-infrared region. Spectral observations were collected for two consecutive years in Italy in a subalpine grassland equipped with an eddy covariance (EC) flux tower that provides continuous measurements of net ecosystem carbon dioxide (CO2) exchange (NEE) and the derived GPP. Different VIs were calculated based on ESA-MERIS and NASA-MODIS spectral bands and correlated with biophysical (Leaf area index, LAI; fraction of photosynthetically active radiation intercepted by green vegetation, fIPARg), biochemical (chlorophyll concentration) and ecophysiological (green light-use efficiency, LUEg) canopy variables. In this study, the normalized difference vegetation index (NDVI) was the index best correlated with LAI and fIPARg (r = 0.90 and 0.95, respectively), the MERIS terrestrial chlorophyll index (MTCI) with leaf chlorophyll content (r = 0.91) and the photochemical reflectance index (PRI551), computed as (R531-R551)/(R531+R551) with LUEg (r = 0.64). Subsequently, these VIs were used to estimate GPP using different modelling solutions based on Monteith's light-use efficiency model describing the GPP as driven by the photosynthetically active radiation absorbed by green vegetation (APARg) and by the efficiency (ε) with which plants use the absorbed radiation to fix carbon via photosynthesis. Results show that GPP can be successfully modelled with a combination of VIs and meteorological data or VIs only. Vegetation indexes designed to be more sensitive to chlorophyll content explained most of the variability in GPP in the ecosystem investigated, characterised by a strong seasonal dynamic of GPP. Accuracy in GPP estimation slightly improves when taking into account high frequency modulations of GPP driven by incident PAR or modelling LUEg with the PRI in model formulation. Similar results were obtained for both measured daily VIs and VIs obtained as 16-day composite time series and then downscaled from the compositing period to daily scale (resampled data). However, the use of resampled data rather than measured daily input data decreases the accuracy of the total GPP estimation on an annual basis.
Parameters estimation of intensity decay relationships
F. Cella,G. Zonno,F. Meroni
Annals of Geophysics , 1996, DOI: 10.4401/ag-4038
Abstract: This paper presents a methodology that analyses a set of observed intensities and estimates the parameters of an adopted attenuation law directly using the data points. A procedure was developed to define and evaluate the equivalent radii Di of the isoseismal lines. From these data it is possible to derive the parameters of the attenuation law. Moreover a validation procedure was developed to measure the capability of intensity decay relationships to reproduce the observed intensities. A case study of 55 earthquakes, divided into 9 subsets, of similar-attenuation zones, was analysed, using, as attenuation law, the one proposed by Grandori (1987, l991) to estimate either the parameters for each single earthquake or the parameters of an average intensity decay relationship for the similar-attenuation zones. The calculated intensity decay relationships result in 60- 70% of correctly reproduced points for most intensity data maps analysed. Analysing the similar-attenuation zones and different earthquakes simultaneously, the parameters of attenuation laws obtain results with a lower percentage of correctly reproduced points. The proposed methodology seems to be effective and suitable to reach practical results in parameters estimation of intensity decay relationships.
Unusual Case of Bilateral Breast Cancer: A Pure Encapsulated Papillary Breast Tumor of the Right Breast and a Contralateral Invasive Ductal Carcinoma  [PDF]
Alberto Testori, Valentina Errico, Edoardo Bottoni, Emanuele Voulaz, Stefano Meroni, Roberto Travaglini, Marco Alloisio
Advances in Breast Cancer Research (ABCR) , 2015, DOI: 10.4236/abcr.2015.42004
Abstract:

Background: Intracystic papillary breast cancer is a very rare tumor that occurs most frequently in elderly postmenopausal women. Aim: In this article we presented a case of a 66-year-old woman who underwent excisional biopsy due to a right breast mass. Case presentation: Histological examination revealed the “pure” encapsulated papillary breast carcinoma without coexisting in situ neoplasm and/or invasive carcinoma. This is a rare lesion of the breast that can clinically mimic breast benign mass with only local or regionally aggressive course. Conclusion: In order to avoid misdiagnosis, both the clinician and the breast radiologist should have the possibility of diagnosing this tumor. Intracystic papillary carcinoma of the breast associated with lymph node?metastasis has rarely been reported, but the sentinel lymph node biopsy may be prudent in such cases, despite the non aggressive behavior.

Mixing Patterns from the Groups Sigma (n phi)
Claudia Hagedorn,Aurora Meroni,Lorenzo Vitale
Mathematics , 2013, DOI: 10.1088/1751-8113/47/5/055201
Abstract: We survey the mixing patterns which can be derived from the discrete groups Sigma (36 x 3), Sigma (72 x 3), Sigma (216 x 3) and Sigma (360 x 3), if these are broken to abelian subgroups Ge and Gnu in the charged lepton and neutrino sector, respectively. Since only Sigma (360 x 3) possesses Klein subgroups, only this group allows neutrinos to be Majorana particles. We find a few patterns that can agree well with the experimental data on lepton mixing in scenarios with small corrections and that predict the reactor mixing angle theta_{13} to be 0.1 <= theta_{13} <= 0.2. All these patterns lead to a trivial Dirac phase. Patterns which instead reveal CP violation tend to accommodate the data not well. We also comment on the outer automorphisms of the discussed groups, since they can be useful for relating inequivalent representations of these groups.
High sensitivity double beta decay study of 116-Cd and 100-Mo with the BOREXINO Counting Test Facility (CAMEO project)
G. Bellini,B. Caccianiga,M. Chen,F. A. Danevich,M. G. Giammarchi,V. V. Kobychev,B. N. Kropivyansky,E. Meroni,L. Miramonti,A. S. Nikolayko,L. Oberauer,O. A. Ponkratenko,V. I. Tretyak,S. Yu. Zdesenko,Yu. G. Zdesenko
Physics , 2000, DOI: 10.1007/s100520100594
Abstract: The unique features (super-low background and large sensitive volume) of the CTF and BOREXINO set ups are used in the CAMEO project for a high sensitivity study of 100-Mo and 116-Cd neutrinoless double beta decay. Pilot measurements with 116-Cd and Monte Carlo simulations show that the sensitivity of the CAMEO experiment (in terms of the half-life limit for neutrinoless double beta decay) is (3-5) 10^24 yr with a 1 kg source of 100-Mo (116-Cd, 82-Se, and 150-Nd) and about 10^26 yr with 65 kg of enriched 116-CdWO_4 crystals placed in the liquid scintillator of the CTF. The last value corresponds to a limit on the neutrino mass of less than 0.06 eV. Similarly with 1000 kg of 116-CdWO_4 crystals located in the BOREXINO apparatus the neutrino mass limit can be pushed down to m_nu<0.02 eV.
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