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The Information Protection in Automatic Reconstruction of Not Continuous Geophysical Data Series

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Journal of Data Analysis and Information Processing 2019年第4期7卷 208-227页

作者： osvaldo faggioni Istituto Nazionale di Geofisica e Vulcanologia Roma Italy DITEN SEA Lab Università di Genova Genova Italy

We show a quantitative technique characterized by low numerical mediation for the reconstruction of temporal sequences of geophysical data of length L interrupted for a time ΔT where . The aim is to protect the information acquired before and after the interruption by means of a numerical protocol with the lowest possible calculation weight. The signal reconstruction process is based on the synthesis of the low frequency signal extracted for subsampling (subsampling ∇Dirac = ΔT in phase with ΔT) with the high frequency signal recorded before the crash. The SYRec (SYnthetic REConstruction) method for simplicity and speed of calculation and for spectral response stability is particularly effective in the studies of high speed transient phenomena that develop in very perturbed fields. This operative condition is found a mental when almost immediate informational responses are required to the observation system. In this example we are dealing with geomagnetic data coming from an uw counter intrusion magnetic system. The system produces (on time) information about the transit of local magnetic singularities (magnetic perturbations with low spatial extension), originated by quasi-point form and kinematic sources (divers), in harbors magnetic underwater fields. The performances of stability of the SYRec system make it usable also in long and medium period of observation (activity of geomagnetic observatories).

关键词： Geomatic Geomagnetism Not Continuous Data Series Synthetic Reconstruction Protection of the Physic Informations Data Manipulation

The Fourier Notation of the Geomagnetic Signals Informative Parameters

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Journal of Signal and Information Processing 2018年第3期9卷 153-166页

作者： osvaldo faggioni DITEN-SEALab-ACM Laboratory Department of Electric Electronic Telecommunication Engineering and Naval Architecture University of Genova Genova Italy Istituto Nazionale di Geofisica e Vulcanologia Rome Italy

The paper discusses the quantitative definition of the s/n (signal to noise ratio) by means of new computational parameters derived (and computed) by the Fourier analysis. The theme is of great relevance when the geomagnetic observed field has high transient noise and high energy content (*** signal interfered by human activity magnetic band) and when the signal analysis action is oriented to the detection of magnetic sources characterized by quasi-punctiform size, low energy level and kinetic mechanical status (*** armed terrorist). The paper shows the results obtained introducing two new informative spectral parameters: the informative capability “C” and the enhanced informative capability “eC”. These parameters are depending on the comparison of the energy of the target signal with total field energy and they are characteristics of each elementary signal. C classifies the energy of the spectrum in two metrological bands: elementary signal informative energy EI (band or single signal) and passive energy EP. This metrological classification of the energy overtakes the concept of noise: each signal is part of the noise band when it is not under observation and becomes out of the band when it is under observation (numerical observation→computation). C (and eC) allows to compute the value of the “visibility” of the informative signals in a high energy geomagnetic field (or spectrum). C is a fundamental parameter for the evaluation of the effectiveness of singularity magnetic metrology in the passive detection of small magnetic sources in high noised magnetic field.

关键词： Geomatic Informative Signal Analysis Fourier Analysis Geomagnetism Metrology of Singularity Frequency Domain Observations S/N Manipulation

Measurement and Forecasting of Port Tide Hydrostatic Component in North Tyrrhenian Sea (Italy)

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Open Journal of Marine Science 2020年第2期10卷 52-77页

作者： osvaldo faggioni Istituto Nazionale di Geofisica e Vulcanologia Via di Vigna Murata Roma Italy Applied Computational Metrology Lab INGV-Università di Genova Via Carducci La Spezia Italy

Starting from the end of the 90s not perodic and unpredictable variations in the depth of harbor waters were observed. Long period (from 24 hours to a few days) and wide amplitude are their main features. Experience showed that this phenomenon is a risk for harbor navigation and mooring. It may be a serious obstacle to waterside port activities. The first observation of the data does not link the super-highs and the super-dry tides to the meteorological dynamic of sea-atmosphere interaction (i.e. Storm Effect). More, the attempt to compensate for these sea depth fluctuations by means of the well-known offshore hydrobarometric inverse parameter (1 [cm] sea level variation for ǃ [hPa] atmospheric pressure variation) underestimates the amplitude of the phenomenon. In the first years of 2000, the Italian Ministry of Transport launched a national project for the definition of thee-amplitude and time of these tidal anomalous waves. The measure of harbors hydrobarometric inverse factors showed a much more intense value than the theoretical one (computed for the offshore). These amplification factors are characteristic of each harbor and can be double (in exceptional cases even more) than offshore. The delay between the arrival times of these tidal waves (induced phenomenon) respect to the time of arrival of the atmospheric pressure variation (inducing phenomenon) depends on 1) morphology of the port basin sea floor and 2) harbor and off-shre water dynamics relationship (first approximation). For these reasons the hydro barometric inverse parameter is not effectiveness computable but it can be determined statistically.

关键词： Coastal and Port Tides Hydrostatic Component Gravimetric Measurements Safety of Port Navigation and Docking

Informative Signal Analysis: Metrology of the Underwater Geomagnetic Singularities in Low-Density Ionic Solution (Sea Water)

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Journal of Signal and Information Processing 2018年第1期9卷 1-23页

作者： osvaldo faggioni Maurizio Soldani Giacomo Cozzani Rodolfo Zunino DITEN-SEALab-ACM Laboratory Department of Electric Electronic Telecommunication Engineering and Naval Architecture University of Genoa Genoa Italy Istituto Nazionale di Geofisica e Vulcanologia Rome Italy CNR—Consiglio Nazionale delle Ricerche ITD—Istituto per le Tecnologie Didattiche Genoa Italy

The paper tackles the problem of reading singularities of the geomagnetic field in noisy underwater (UW) environments. In particular, we propose a novel metrological approach to measuring low-amplitude geomagnetic signals in hard noisy magnetic environments. This research action was launched to develop a detection system for enforcing the peripheral security of military bases (harbors/coasts and landbases) and for asymmetric warfare. The concept underlying this theory is the spatial stability in the temporal variations of the geomagnetic field in the observation area. The paper presents the development and deployment of a self-informed measurement system, in which the signal acquired from each sensor—observation node—is compared with the signal acquired by the adjacent ones. The effectiveness of this procedure relates to the inter-node (sensor-to-sensor) distance, L;this quantity should, on one hand, correlate the noise and, on the other hand, decorrelate the target signal. The paper presents the results obtained, that demonstrate the ability of self-informed systems to read weak magnetic signals even in the presence of very high noise in low-density ionic solutions (i.e. sea water).

关键词： Geomatic Geophysical Signals Processing Geomagnetic Metrology Harbor Protection Counterterrorism Mag Security System

Weighted Weak-type Estimates for Multilinear Commutators of Fractional Integrals on Spaces of Homogeneous Type

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Acta Mathematica Sinica,English Series 2007年第10期23卷 1813-1826页

作者： osvaldo GOROSITO Gladis PRADOLINI Oscar SALINAS Department of Mathematics Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina

We obtain weighted distributional inequalities for multilinear commutators of the fractional integral on spaces of homogeneous type, The techniques developed in this work involve the behavior of some fractional maximal functions. In relation to these operators, as a main tool, we prove a weighted weak type boundedness result, which is interesting in itself.

关键词： commutators fractional integral operator multilinear operators

Seismic response of deep circular tunnels subjected to S-waves:Axial bending

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Underground Space 2024年第4期17卷 267-279页

作者： Chatuphat Savigamin Antonio Bobet osvaldo P.M.Vitali HR Engineering Services Inc.MedleyFL 33166United States Lyles School of Civil Engineering Purdue UniversityWest LafayetteIN 47907United States Department of Civil Environmentaland Construction EngineeringUniversity of Hawaii at ManoaHonoluluHI 96822United States

Ovaling deformation of circular tunnels has received great interest from the tunneling community because this mode of seismicinduced deformation is considered the most ***,there is growing evidence that other deformation modes can also be important and thus need to be considered in *** study presents a new analytical solution to estimate axial bending(snaking),a mode of deformation caused by S-waves impinging on a tunnel parallel to the tunnel *** solution is developed using the soilstructure interaction approach with the assumption that the interface between the ground and the tunnel lining is frictionless(fullslip).Full dynamic numerical simulations are conducted to verify the new full-slip solution,together with the existing no-slip *** of dynamic amplification are also explored for both full-slip and no-slip interface conditions by changing the wavelength(or frequency)of the seismic input motions.

关键词： Seismic response of tunnels Analytical solutions Soil-structure interaction Axial bending Snaking S-waves

Construction of Dulac functions for mathematical models in population biology

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International Journal of Biomathematics 2015年第3期8卷 135-154页

作者： osvaldo Osuna Cruz Vargas-De-Leon Instituto de Fisica y Matematicas Universidad MichoacanaEdif. C-3 Cd. Universitaria CP 58040 Morelia Michoacan Mexico Unidad de Medicina Experimental Hospital General de Mexico "Dr. Eduardo Liceaga" DF 06726 Mdxieo

In this paper, we present a method for constructing a Dulac function for mathematical models in population biology, in the form of systems of ordinary differential equations in the plane.

关键词： Population models epidemic models chemostat models Dulac function nonexistence of periodic orbits.

Reconstruction of debris-flow activity in a temperate mountain forest catchment of central Mexico

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Journal of Mountain Science 2019年第9期16卷 2096-2109页

作者： osvaldo FRANCO-RAMOS Markus STOFFEL Juan Antonio BALLESTEROS-CANOVAS Instituto de Geografia. Universidad NacionalAutonoma de Mexico Ciudad Universitaria Coyoacan 04510 Mexico Dendrolab.ch Department of Earth Sciences University of Geneva 13 rue des Maraichers CH-1205 Geneva Switzerland Climate Change Impacts and Risks in the Anthropocene (C-CIA) Institute for Environmental Sciences University of Geneva 66 Boulevard Carl-Vogt CH-1205 Geneva Switzerland Department F.-A. Forelfor Environmental and Aquatic Sciences University of Geneva 66 Boulevard Carl-Vogt CH- 1205 Geneva Switzerland

The use of dendrochronology to study and date geomorphic processes in volcanic environments is still incipient, even more so on the volcanic slopes covered by temperate forests in central Mexico. Mass movements, such as debris flows, often impact forest stands where they cause damage to individual trees, thereby generating growth disturbances(GD) in the tree-ring records. The identification and dating of GD enables reconstruction of the age of trees colonizing bare surfaces after major events, but also allows the assessment of the frequency or spatial distribution of past geomorphic process activity. Here we used increment cores from 65 Pinus leiophylla, Abies religiosa, and Alnus jorullensis trees growing in the Axal gorge, on the southern slopes of La Malinche volcano, to unravel past debris-flow activity both temporally and spatially. Based on the combination of GD records, a weighted tree response index(Wit), field evidence and hydrometeorological records, we reconstructed 23 debris flows since ***, almost two-thirds of the reconstructed years with debris-flow activity in Axal gorge match with events recorded in Axaltzintle gorge located on the NE slopes of La Malinche. These findings suggest a regional triggering mechanism, most likely related to the occurrence of hurricanes. This research could be useful for disaster risk management of the La Malinche National Park.

关键词： Debris flows La Malinche volcano Dendrogeomorphology Temperate forest Hydrometeorological phenomena

Brain angiotensin Ⅱ in dopaminergic imbalance-derived pathologies:neuroinflammation and vascular responses

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Neural Regeneration Research 2021年第3期16卷 504-505页

作者： Victoria Belén Occhieppo osvaldo Martin Basmadjian Claudia Bregonzio Instituto de Farmacología Experimental Córdoba(IFEC-CONICET) Departamento de FarmacologíaFacultad de Ciencias Químicas Universidad Nacional de CórdobaCórdobaArgentina

Brain angiotensinⅡ(ANGⅡ)as a pleiotropic player:Mental disorders have been commonly associated with an imbalance in many neurotransmitter systems,such as dopamine,glutamate,and gamma-aminobutyric *** the complexity of brain functioning,all components of the neurovascular unit should be considered in studies for a better comprehension of the physiopathology and possible therapeutics.

关键词： player comprehension imbalance