Search results for "Acs"

IMAGE PROCESSING IN POLLUTION VULNERABILITY ASSESSMENT OF SICILY AQUIFERS

2009

It is generally acknowledged that vulnerability mapping represents an essential tool for territory management. Intrinsic vulnerability can be generally described as “the susceptibility of the aquifer systems, in their different components and in different geometric and hydrodynamics situations, to swallow and diffuse, also mitigating the effects, a fluid or water-transported pollutant, in such a way to produce impact on the groundwater quality, in space and time”. Assessment procedures of vulnerability consider a number of parameters, the estimation of which is usually difficult and very often insufficient to correctly represent aquifer’s features. As aquifers are closely influenced by nume…

Formalizing Semantic of Natural Language through Conceptualization from Existence

2011

International audience; We propose an outline of an approach to formalize semantic from conceptualization for both natural language (NL) and logic expression mechanisms. This goes beyond the level of discussions at conceptual level which has to either end in conscious/unconscious relativity of understanding or subjective enforcement in the form of definitions instead of expected objective semantic. This approach supports to view from a pure mathematical perspective, and explore and locate the fundamental problems. The semantic formalization mechanism realizes the integration of problem description and the solution expression at absolute semantic level. So a problem describing process is equ…

N-order rational solutions to the Johnson equation depending on 2N - 2 parameter

2017

International audience; We construct rational solutions of order N depending on 2N-2 parameters. They can be written as a quotient of 2 polynomials of degree 2N(N+1) in x, t and 2N(N+1) in y depending on 2N-2 parameters. We explicitly construct the expressions of the rational solutions of order 4 depending on 6 real parameters and we study the patterns of their modulus in the plane (x,y) and their evolution according to time and parameters a1,a2,a3,b1,b2,b3.

Multi-parametric families solutions to the Burgers equation

2021

We construct 2N real parameter solutions to the Burgers' equation in terms of determinant of order N and we call these solutions, N order solutions. We deduce general expressions of these solutions in terms of exponentials and study the patterns of these solutions in functions of the parameters for N = 1 until N = 4.

A SU(4) circle times O(3) scheme for nonstrange baryons

2007

4 pages, 3 tables.-- PACS nrs.: 12.39.Jh, 14.20.-c, 14.20.Gk.-- ISI Article Identifier: 000245667300027.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0610257

Monopolium production from photon fusion at the Large Hadron Collider

2008

6 pages, 6 figures.-- PACS nrs.: 14.80.Hv; 95.30.Cq; 98.70.-f; 98.80.-k.-- Printed version published Aug 2009.-- ArXiv pre-print available at: http://arxiv.org/abs/0809.0272

Ultraviolet optical properties of silica controlled by hydrogen trapping at Ge-related defects

2007

We studied the effects induced by the ultraviolet-laser and -lamp exposure sequences on the twofold coordinated germanium (=Ge{sup {center_dot}}{sup {center_dot}}) and the H(II) center (=Ge{sup {center_dot}}-H) in silica. The H(II) centers, generated after the first laser irradiation stage by the trapping of atomic hydrogen H{sup 0} at the (=Ge{sup {center_dot}}{sup {center_dot}}), are destroyed by the subsequent lamp exposure with efficiency depending on photon energy. The H(II) photodestruction is activated from {approx}4 eV, and its cross section is here quantitatively measured, so giving the absorption profile of this center. Consistent with the observed correlated recovering of (=Ge{su…

Upper limit on the diffuse flux of ultrahigh energy tau neutrinos from the Pierre Auger Observatory

2008

The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth’s crust. Tau leptons from ντ charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and 31 August 2007 are used to place an upper limit on the diffuse flux of ντ at EeV energies. Assuming an E−2ν differential energy spectrum the limit set at 90% C.L. is E2νdNντdEν<1.3×10−7  GeV cm−2 s−1 sr−1 in the energy range 2×1017 eV<E<2×1019  eV.

Étude multi-isotopique de microbialites actuels au sein d'analogues Précambriens (lacs de cratères volcaniques alcalins)

2021

Sintonikas ietekme uz acs akomodāciju

2018

Maģistra darbs uzrakstīts latviešu valodā uz 39 lpp. Tas satur 22 attēlus, 3 tabulas un atsauces uz 40 literatūras avotiem. Darba mērķis: analizēt acs akomodācijas izmaiņas sintonikas terapijas ietekmē pacientiem ar dažādām redzes funkciju problēmām. Metodika: pētījumā tika analizētas klīnikas «Elisa Aribau-Centro de Optometría y Terapia Visual» (Barselona, Spānija) pacientu akomodācijas funkciju un funkcionālā redzes lauka izmaiņas, ja kā terapijas līdzeklis tiek izmantota tikai sintonika un ja sintoniku papildina citi redzes treniņi. Rezultāti: sintonikas terapija būtiski uzlabo pacientu funkcionālo redzes lauku un, kā terapijas līdzeklis, spēj uzlabot pozitīvās un negatīvās akomodācijas …