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Institution

University of Palermo

EducationPalermo, Italy
About: University of Palermo is a education organization based out in Palermo, Italy. It is known for research contribution in the topics: Population & Cancer. The organization has 15621 authors who have published 40250 publications receiving 964384 citations. The organization is also known as: Università degli Studi di Palermo & Universita degli Studi di Palermo.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow is presented, which suggests that the observed X-ray plateau is powered by a spinning down central engine, possibly a millisecond pulsar, which dissipates energy at an internal radius before depositing energy into the external shock.
Abstract: We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays a spectral evolution already seen in other gamma-ray bursts. The optical afterglow shows a shallow decay up to ~2 d after the burst, which is not consistent with standard afterglow models. The most intriguing feature is a very steep decay in the X-ray flux at ~20 ks after the burst, ending an apparent plateau. The abrupt drop of the X-ray light curve rules out an external shock as the origin of the plateau in this burst and implies long-lasting activity of the central engine. The temporal and spectral properties of the plateau phase point towards a continuous central engine emission rather than the episodic emission of X-ray flares. We suggest that the observed X-ray plateau is powered by a spinning down central engine, possibly a millisecond pulsar, which dissipates energy at an internal radius before depositing energy into the external shock.

169 citations

Journal ArticleDOI
TL;DR: In this paper, an original laboratory scale planar geometry Membrane Distillation unit was designed, built and tested for future coupling with solar energy, in order to allow for multi-stage arrangement, compactness, internal heat recovery and possible integration with a polymeric heat exchanger for final brine heating.
Abstract: Membrane Distillation (MD) processes are gaining growing interest among novel desalination technologies, in particular for small scale applications also coupled with non-conventional energy sources In the present work an original laboratory scale planar geometry Membrane Distillation unit was designed, built and tested for future coupling with solar energy Though conceptually simple, the original geometry was developed in order to allow for multi-stage arrangement, compactness, internal heat recovery and possible integration with a polymeric heat exchanger for final brine heating by means of solar energy or waste heat The laboratory scale unit was tested in order to investigate the effect of operating conditions, ie hot feed temperature and flow rate, on the process performance, with particular attention paid to parameters relevant to the design of the system coupled with solar energy Also the effect of different airgap configurations was investigated, namely (i) free airgap, (ii) permeate-gap and (iii) partial vacuum airgap arrangements In parallel, a simplified predictive model based on heat and mass balance and transport equations was implemented and validated against experimental data collected The validated model was used to simulate the behavior of multi-stage units based on the planar geometry investigated in the present work for the purpose of a simplified economic analysis of the system and for the conceptual design of the solar energy powered MD unit to be installed at Universita di Palermo, where further testing will be performed

169 citations

Journal ArticleDOI
TL;DR: In this paper, a mixture of bimetallic Au-Pd catalysts supported on silica with different Au/Pd atomic ratios were prepared by simultaneous reduction of palladium and gold precursors by ethanol in the presence of polyvinylpyrrolidone (PVP).
Abstract: Bimetallic Au-Pd catalysts supported on silica with different Au/Pd atomic ratios were prepared by simultaneous reduction of palladium and gold precursors by ethanol in the presence of the polymer, polyvinylpyrrolidone (PVP). Formation of alloyed particles was detected by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and CO chemisorption measurements. The catalysts were tested in the catalytic oxidation of CO using a plug–flow reactor. The CO conversion was determined as a function of temperature. The monometallic palladium and the palladium-rich catalysts behaved quite similarly and were the most active catalysts. A drastic reduction of the CO oxidation activity was observed for the 50/50 Au/Pd catalyst and for samples with increasing amount of gold.

169 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the research of modified halloysite nanotubes and their applications in biological and medical fields is presented, where chemical modification of both surfaces (inner lumen and outer surface) is a strategy to tune the nanotube's properties.
Abstract: Halloysite (HNT) is a promising natural nanosized tubular clay mineral that has many important uses in different industrial fields. It is naturally occurring, biocompatible, and available in thousands of tons at low cost. As a consequence of a hollow cavity, HNT is mainly used as nanocontainer for the controlled release of several chemicals. Chemical modification of both surfaces (inner lumen and outer surface) is a strategy to tune the nanotube's properties. Specifically, chemical modification of HNT surfaces generates a nanoarchitecture with targeted affinity through outer surface functionalization and drug transport ability from functionalization of the nanotube lumen. The primary focus of this review is the research of modified halloysite nanotubes and their applications in biological and medical fields.

169 citations

Journal ArticleDOI
TL;DR: In this paper, the authors describe the method of applying thermochromic liquid crystals and true-colour image processing to give local Nusselt number distribution over the surface and average Nu, both of quantitative reliability; a careful uncertainty analysis is also presented.

169 citations


Authors

Showing all 15895 results

NameH-indexPapersCitations
Robin M. Murray1711539116362
Frede Blaabjerg1472161112017
Jean Bousquet145128896769
Zhanhu Guo12888653378
Jean Ballet11526346301
Antonio Facchetti11160251885
Michele Pagano9730642211
Frank Z. Stanczyk9362030244
Eleonora Troja9127130873
Francesco Sciortino9053628956
Zev Rosenwaks8977232039
Antonio Russo8893434563
Carlo Salvarani8873031699
Giuseppe Basso8764333320
Antonio Craxì8665939463
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023147
2022384
20212,977
20202,753
20192,412
20182,250