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Search Results: 1 - 10 of 208485 matches for " L. Formaro "
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Role of antileukotrienes in acute asthma exacerbations
Domenico Lorenzo Urso,Daniele Vincenzo,Lorenzo Formaro,Ada Federico
Reviews in Health Care , 2012, DOI: 10.7175/rhc.v3i2.155
Abstract: Acute asthma exacerbations are one of the most frequent reasons to visit the emergency department or general practitioner. Although current standard treatments for acute asthma – including supplemental oxygen, short-acting β2-agonists, systemic corticosteroids and anticholinergics – are quite effective in most patients, they are inadequate for rapid and sustained improvement in a significant proportion. The antileukotrienes, a relatively new class of drugs, have a role in the treatment of chronic asthma. Their relatively rapid onset of action after endovenous or oral administration and their additive effect to β2-agonists led to the hypothesis that they might be of benefit in acute asthma. This review examines the efficacy of antileukotrienes in the treatment of acute asthma.
Formation Of A Cold Antihydrogen Beam in AEGIS For Gravity Measurements
G. Testera,A. S. Belov,G. Bonomi,I. Boscolo,N. Brambilla,R. S. Brusa,V. M. Byakov,L. Cabaret,C. Canali,C. Carraro,F. Castelli,S. Cialdi,M. de Combarieu,D. Comparat,G. Consolati,N. Djourelov,M. Doser,G. Drobychev,A. Dupasquier,D. Fabris,R. Ferragut,G. Ferrari,A. Fischer,A. Fontana,P. Forget,L. Formaro,M. Lunardon,A. Gervasini,M. G. Giammarchi,S. N. Gninenko,G. Gribakin,R. Heyne,S. D. Hogan,A. Kellerbauer,D. Krasnicky,V. Lagomarsino,G. Manuzio,S. Mariazzi,V. A. Matveev,F. Merkt,S. Moretto,C. Morhard,G. Nebbia,P. Nedelec,M. K. Oberthaler,P. Pari,V. Petracek,M. Prevedelli,I. Y. Al-Qaradawi,F. Quasso,O. Rohne,S. Pesente,A. Rotondi,S. Stapnes,D. Sillou,S. V. Stepanov,H. H. Stroke,G. Tino,A. Vairo,G. Viesti,H. Walters,U. Warring,S. Zavatarelli,A. Zenoni,D. S. Zvezhinskij,for the AEGIS Proto-Collaboration
Physics , 2008, DOI: 10.1063/1.2977857
Abstract: The formation of the antihydrogen beam in the AEGIS experiment through the use of inhomogeneous electric fields is discussed and simulation results including the geometry of the apparatus and realistic hypothesis about the antihydrogen initial conditions are shown. The resulting velocity distribution matches the requirements of the gravity experiment. In particular it is shown that the inhomogeneous electric fields provide radial cooling of the beam during the acceleration.
Multimode/Multifrequency Low Frequency Airborne Radar Design
Sandra Costanzo,Giuseppe Di Massa,Antonio Costanzo,Antonio Borgia,Claudio Papa,Giovanni Alberti,Giuseppe Salzillo,Gianfranco Palmese,Dario Califano,Luca Ciofanello,Maria Daniele,Claudia Facchinetti,Francesco Longo,Roberto Formaro
Journal of Electrical and Computer Engineering , 2013, DOI: 10.1155/2013/857530
Abstract: This work deals with the design of multimode/multifrequency airborne radar suitable for imaging and subsurface sounding. The system operates at relatively low frequencies in the band ranging from VHF to UHF. It is able to work in two different modalities: (i) nadir-looking sounder in the VHF band (163?MHz) and (ii) side-looking imager (SAR) in the UHF band with two channels at 450?MHz and 860?MHz. The radar has been completely designed by CO.Ri.S.T.A. for what concerns the RF and the electronic aspect, and by the University of Calabria for what concerns the design, realization, and test of SAR antennas. The radar has been installed on a civil helicopter and its operation has been validated in flight in both sounder and imager modality. Preliminary surveys have been carried out over different areas of Campania region, South Italy. 1. Introduction In recent years, great interest has been devoted to the development of airborne radars working in the frequency range from VHF to UHF bands (e.g., see [1–4]). The combination of low frequencies with high relative bandwidth of such systems allows several military and civilian applications. According to Table 1, these range from forestry applications, biomass measuring, and monitoring, archaeological and geological exploration, glaciers investigation, and detection and localization of buried targets. In addition, their extension to noncivil applications concerns subsurface target detection and foliage penetration. The development of this type of systems entails technological and scientific efforts in the design of antennas, low noise amplifiers, band-pass filters, and digital receiver technology, as well as in the field of data-processing algorithms. Table 1: Applications for low frequency airborne radars. In this framework, the Italian Space Agency (ASI) has promoted the development of a new multifunction/multimode airborne radar able to operate as a nadir-looking sounder in the VHF band and as side-looking imager in the UHF band. On one side, it constitutes a “proof of concept” for next Earth observation and planetary exploration space missions; from another perspective, the system can be seen as a validation tool for civil and non-low frequency radar terrestrial diagnostics, imaging, and monitoring applications. The radar system has been conceived and funded by ASI to be a growing laboratory to experiment and asses potentialities of low frequency radar bands (up to about 1?GHz). To this aim, three working frequency values have been chosen, namely, low, middle, and high ones. The low one (163?MHz), up to now,
Computing Reachable Sets as Capture-Viability Kernels in Reverse Time  [PDF]
No?l Bonneuil
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.311219
Abstract: The set SF(x0;T) of states y reachable from a given state x0 at time T under a set-valued dynamic x’(t)∈F(x (t)) and under constraints x(t)∈K where K is a closed set, is also the capture-viability kernel of x0 at T in reverse time of the target {x0} while remaining in K. In dimension up to three, Saint-Pierre’s viability algorithm is well-adapted; for higher dimensions, Bonneuil’s viability algorithm is better suited. It is used on a large-dimensional example.
Three Dimensional Evolution of SN 1987A in a Self-Gravitating Disk  [PDF]
L. Zaninetti
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.32010
Abstract:

The introduction of an exponential or power law gradient in the interstellar medium (ISM) allows to produce an asymmetric evolution of the supernova remnant (SNR) when the framework of the thin layer approximation is adopted. Unfortunately both the exponential and power law gradients for the ISM do not have a well defined physical meaning. The physics conversely is well represented by an isothermal self-gravitating disk of particles whose velocity is everywhere Maxwellian. We derived a law of motion in the framework of the thin layer approximation with a control parameter of the swept mass. The photon’s losses, which are often neglected in the thin layer approximation, are modeled trough velocity dependence. The developed framework is applied to SNR 1987A and the three observed rings are simulated.

The Luminosity Function of Galaxies as Modeled by a Left Truncated Beta Distribution  [PDF]
L. Zaninetti
International Journal of Astronomy and Astrophysics (IJAA) , 2014, DOI: 10.4236/ijaa.2014.41013
Abstract: A first new luminosity function of galaxies can be built starting from a left truncated beta probability density function, which is characterized by four parameters. In the astrophysical conversion, the number of parameters increases by one, due to the addition of the overall density of galaxies. A second new galaxy luminosity function is built starting from a left truncated beta probability for the mass of galaxies once a simple nonlinear relationship between mass and luminosity is assumed; in this case the number of parameters is six because the overall density of galaxies and a parameter that regulates mass and luminosity are added. The two new galaxy luminosity functions with finite boundaries were tested on the Sloan Digital Sky Survey (SDSS) in five different bands; the results produce a better fit than the Schechter luminosity function in two of the five bands considered. A modified Schechter luminosity function with four parameters has been also analyzed.
On the Dark Matter’s Halo Theoretical Description  [PDF]
L. M. L. M. Chechin
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.35052
Abstract: We argued that the standard field scalar potential couldn’t be widely used for getting the adequate galaxies’ curve lines and determining the profiles of dark matter their halo. For discovering the global properties of scalar fields that can describe the observable characteristics of dark matter on the cosmological space and time scales, we propose the simplest form of central symmetric potential celestial-mechanical type, i.e. U(φ) = –μ/φ. It was shown that this potential allows get rather satisfactorily dark matter profiles and rotational curves lines for dwarf galaxies. The good agreement with some previous results, based on the N-body simulation method, was pointed out. A new possibility of dwarf galaxies’ masses estimation was given, also.
Analytical Approximation to the Dynamics of a Binary Stars System with Time Depending Mass Variation  [PDF]
Gustavo V. López, Elkin L. López
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.63053
Abstract: We study the classical dynamics of binary stars when there is an interchange of mass between them. Assuming that one of the stars is more massive than others, the dynamics of the lighter one is analyzed as a function of its time depending mass variation. Within our approximations and models for mass transference, we obtain a general result which establishes that if the lightest star looses mass, its period increases. If the lightest star wins mass, its period decreases.
Quantization and Stable Attractors in a DissipativeOrbital Motion  [PDF]
Daniel L. Nascimento, Antonio L. A. Fonseca
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.24030
Abstract: We present a method for determining the motion of an electron in a hydrogen atom, which starts from a field Lagrangean foundation for non-conservative systems that can exhibit chaotic behavior. As a consequence, the problem of the formation of the atom becomes the problem of finding the possible stable orbital attractors and the associated transition paths through which the electron mechanical energy varies continuously until a stable energy state is reached.
Genetic and dietary factors related to schizophrenia  [PDF]
Karl L. Reichelt, Michael L. G. Gardner
Open Journal of Psychiatry (OJPsych) , 2012, DOI: 10.4236/ojpsych.2012.21003
Abstract: Biochemical, immunological and epidemiological evidence increasingly support the suggestion that there is a causal relationship between gluten/gliadin and schizophrenia as originally proposed by F. C. Dohan. Furthermore the necessary physiological mechanisms exist to explain a mechanism involving bioactive peptides from these proteins, and these show that this mechanism is possible and probable in at least in a substantial subgroup of schizophrenic patients. Evidence shows a fairly strong genetic disposition, and it must be recognised that any genetic mechanism must implicate altered chemistry and function of proteins. Evidence supports the likelihood that dietary intervention is beneficial for some, and this demands further investigation. A similar conclusion may apply to autism spectrum conditions.
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