1,720,980 research outputs found
odelli digitali del terreno (DTM) ad alta risoluzione per il monitoraggio dei ghiacciai alpini – Digital Terrain Models of a high resolution for monitoring alpine glaciers
No full textThe aim of the research is the 3D reconstruction of a glacier surface thr ough the use of satellite stereoscopic images and Geographic al Information Systems (GIS). Th e project ‘s doubl e goal is to improve Digital Terrain Mod el (DTM) extraction techniques in morphologically highlycomplex areas and to obtain a high resolution DTM for studying, monitoring, and quant ifying the glacial resource. The ext raction of the high- resolution glacial surface DTM faces different challenges due to the ext reme physical variability of the surface. Glacier ice is a continuously moving deformable material that can locally genera te morphologically complex structures such as seracs and crevasses. These features show a seasonal variability linked to meteorological condi tions. An additional reason of compl exity is the presen ce of debri s (surface moraines) and snow cover: they can apparently alter the spatial shape of the glacier as well as its own elevation. The aim of the research is to identi fy a fast. .reproducible, and reliable method to support the traditional glacier survey and moni toring techniques. From the technolo gical point of view, we also want to verify the chances offered by new remote sensing acquisition systems and relevant elaboration software. Thi s first pa rt of the research has been of value in proving the reliability of the aerial and satellite images plane/ elevation data elaboration system, in checking the acquisition difficulties and costs, and in testing the utilization limits of the remote sensed data
NEONATAL MUCOLIPIDOSIS-II (I-CELL DISEASE) - CLINICAL, RADIOLOGICAL AND BIOCHEMICAL-STUDIES IN A CASE
No full textElevated calcitonin gene-related peptide in polycythemic newborn-infants
No full textIn this study, calcitonin gene-related peptide levels were measured in cord and at 16-36 h of extrauterine life in 43 polycythemic newborns; 20 healthy term infants were also studied as controls. Calcitonin gene-related peptide values were significantly higher in polycythemic neonates in comparison with controls both at delivery and at 16-36 h after birth. Five polycythemic (11.6%) infants who develop hypocalcemia had greater elevated calcitonin gene-related peptide concentrations. Our data suggest that calcitonin gene-related peptide may be implicated in the circulatory adaptation to extrauterine life. In polycythemic neonates, calcitonin gene-related peptide is probably increased to compensate for blood hyperviscosity; in some cases, high calcitonin gene-related peptide concentrations may induce hypocalcemia
Comparison of methods for implementing high-resolution digital terrain models for reproducing the surface of glaciers.
No full textThe aim of the research is the tri-dimensional reconstruction of glacial topographic surfaces by the comparison of satellite images and traditional techniques, such as aerial photo images and topographic maps. The considered area La Mare Glacier (TN) East Alpes Italy, located in the Stelvio National Park, one of the Italian biggest national park. The double aim of the project is to validate and improve the techniques for the extraction of Digital Terrain Model (DTM) with a high morphologic complexity areas and to produce a DTM for studying, monitoring and quantifying the glacial resources. The DTM extracted from different sources will be integrated with GIS. Considering all the multi-disciplinary information that has been collected until now on this glacial areas, GIS represents the reference system for the analysis of the landscape changes
“Climate changes, active tectonics and related geomorphic effects in high mountain belts and plateaux”, Proceedings of the IAG International Symposium in Addis Ababa (Ethiopia)
No full textPROPHYLAXIS AND TREATMENT OF NEONATAL ISOIMMUNE THROMBOCYTOPENIA - DESCRIPTION OF 2 CASES
No full textMetodologie a confronto per la realizzazione di High Resolution DEMs per la ricostruzione delle superfici glaciali
No full textVengono illustrate le metodologie utilizzate per la realizzazione di DEM ad alta risoluzione nella ricostruzione delle superfici glaciali
Intact parathyroid-hormone levels during pregnancy, in healthy term neonates and in hypocalcemic preterm infants
No full textWe measured parathyroid hormone levels in pregnant and nonpregnant women and at 1,2 and 5 days of life in healthy term neonates and in hypocalcemic preterm infants using a new immunoradiometric assay which measures only biologically active intact parathyroid hormone and by a mid-molecule parathyroid hormone radioimmunoassay. During pregnancy intact and mid-molecule parathyroid hormone levels did not show any modification and were not different from parathyroid hormone levels of nonpregnant age-matched controls. Serum calcium and phosphorus levels did not vary during each trimester of pregnancy. In cord serum intact and mid-molecule parathyroid hormone values were low in both term and preterm infants. In term neonates intact and mid-molecule parathyroid hormone levels peaked on day 1; in preterm infants intact parathyroid hormone levels peaked on day 1 while mid-molecule parathyroid hormone values peaked on day 2. Intact parathyroid hormone levels showed a more marked increase in preterm (19-fold) than in term neonates (7.5-fold) on day 1. Our data do not confirm the previously reported "physiologic" hyperparathyroidism in pregnancy. Moreover we found a normal parathyroid gland responsiveness to decreasing serum calcium levels in the first days of life in term and preterm infants. Our results suggest that measurement of intact parathyroid hormone 1-84 by immunora-diometric assay in the first days of life is a more sensitive index of parathyroid gland secretory function than the measurement of middle or carboxyl-terminal parathyroid hormone fragments allowing the detection of the dynamic changes of parathyroid hormone which occur in hypocalcemic preterm infants
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
