Results 31 to 40 of about 434,571 (333)

Symbolic Analysis for Boundary Problems: From Rewriting to Parametrized Groebner Bases [PDF]

open access: yes, 2012
We review our algebraic framework for linear boundary problems (concentrating on ordinary differential equations). Its starting point is an appropriate algebraization of the domain of functions, which we have named integro-differential algebras.
Buchberger, Bruno   +3 more
core   +1 more source

Regional ionospheric delay correction model for single frequency PPP users in Turkey [PDF]

open access: yesMicro, Macro & Mezzo Geoinformation, 2015
Ionospheric delay is the major challenge for Single-Frequency Precise Point Positioning (SF-PPP) users. Therefore, a number of organizations have developed ionospheric delay correction products including the International GNSS Service Global Ionospheric ...
Mohamed ABDELAZEEM   +2 more
doaj  

An exploratory study of interpretability for face presentation attack detection

open access: yesIET Biometrics, 2021
Biometric recognition and presentation attack detection (PAD) methods strongly rely on deep learning algorithms. Though often more accurate, these models operate as complex black boxes.
Ana F. Sequeira   +4 more
doaj   +1 more source

The GPS global detection of the ionospheric response to solar flares [PDF]

open access: yes, 2000
This author suggests the concept of a new technology for global detection (GLOBDET) of atmospheric disturbances of natural and technogenic origin, on the basis of phase measurements of the total electron content (TEC) in the ionosphere using an ...
Afraimovich, E. L.
core   +3 more sources

Vaporizadores anestésicos

open access: yesRevista Electrónica de AnestesiaR, 2019
Acercarnos a un respirador anestésico (o bien, a una estación de trabajo para los más finos) es acercarnos a una maquinaria relativamente reciente. Y a pesar de que los actuales modelos se presentan con diseños futuristas, mostrando variedad de pantallas
Alberto Gironés Muriel
doaj   +1 more source

Modeling of GPS total electron content over the African low-latitude region using empirical orthogonal functions [PDF]

open access: yesAnnales Geophysicae, 2019
In this paper, an empirical total electron content (TEC) model and trends in the TEC over the African low-latitude region are presented. GPS-derived TEC data from Malindi, Kenya (geographic coordinates 40.194∘ E, 2.996∘ S), and global ...
G. Andima   +4 more
doaj   +1 more source

TEC Expresses Highly in Hepatocellular Carcinoma and Is Involved in Drug Resistance

open access: yesZhongliu Fangzhi Yanjiu, 2018
Objective To investigate the expression level of TEC, a no-receptor tyrosine kinase, in hepatocellular carcinoma(HCC) tissues and its correlation with drug resistance.
LIU Wen   +5 more
doaj   +1 more source

Real-time detection of tsunami ionospheric disturbances with a stand-alone GNSS receiver. A preliminary feasibility demonstration [PDF]

open access: yes, 2017
It is well known that tsunamis can produce gravity waves that propagate up to the ionosphere generating disturbed electron densities in the E and F regions. These ionospheric disturbances can be studied in detail using ionospheric total electron content (
Crespi, Mattia   +6 more
core   +1 more source

Ионосферный отклик на распространение АГВ по данным ГНСС измерений и когерентного ВЧ зондирования над антарктическими станциями «Вернадский» и «Палмер»

open access: yesУкраїнський антарктичний журнал, 2017
Представлены результаты диагностики перемещающихся ионосферных возмущений (ПИВ) над Ан­тарктическим полуостровом, которые были получены двумя разными методами.
A. A. Sopin   +7 more
doaj   +1 more source

MONITORING IONOSPHERIC VARIATION FOR A DEFINITE PERIOD TIME IN TURKEY [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Ionosphere has been studied by a number of scientists in recent years. Since GPS observations cannot provide TEC value directly, it can be estimated from combination of observations.
S. Inyurt, C. Mekik, O. Yildirim
doaj   +1 more source

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