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Wyszukujesz frazę "Vázquez, J." wg kryterium: Autor


Tytuł:
Suppress or accept? A pilot study to evaluate the effect of coping strategies on ERN amplitude among individuals with obsessive-compulsive traits
Autorzy:
Zambrano-Vazquez, Laura
Szabo, Yvette Z
Santerre, Craig Lee
Allen, John J.B
Powiązania:
https://bibliotekanauki.pl/articles/2106142.pdf
Data publikacji:
2019-11-22
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
ERN
OCD
intrusions
suppression
acceptance
Opis:
Intrusive thoughts are characteristic of psychological disorders; attempts to cope can become maladaptive perpetuating the problem (e.g., thought suppression), while others can provide long-term symptoms relief (e.g., acceptance). Although emerging research begins to explore the neural correlates of these strategies in healthy population, it is important to explore these strategies in populations more likely to naturally attempt to use such strategies (clinical symptoms). The present study explored if the use of cognitive strategies to manage intrusive cognitions would be differentially reflected in psychophysiological measures (i.e., error-related negativity) of individuals characterized by obsessive-compulsive symptoms -a group commonly associated with suppression efforts- relative to a low OC control. 67 participants with high and low OC symptoms were randomly assigned to cognitive strategy (suppression or acceptance). Participants watched an emotion-eliciting video clip and used the assigned cognitive strategy while performing the Stroop task. EEG data was collected. Consistent with well-established and emerging literature, ERN was enhanced in individuals with high OC symptoms and a marginal effect of thought-control strategy was observed, such that ERN amplitude was reduced in the suppression condition and greater for the acceptance condition. Uniquely, the study expanded on emerging literature by exploring whether the relationship between ERN and cognitive strategies was moderated by OC level. Although results were not conclusive, these preliminary findings represent an important first step to study effects of suppression and acceptance on the ERN in a sample characterized by clinically-relevant symptoms and overall encourage further exploration.
Źródło:
Acta Neuropsychologica; 2019, 17(3); 283-300
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EDAS (Egnos Data Access Service) differential GNSS corrections: a reliable free-of-charge alternative for precision farming in Europe
Autorzy:
Vázquez, J.
Lacarra, E.
Morán, J.
Sánchez, M. A.
González, A.
Bruzual, J.
Rioja, J.
Powiązania:
https://bibliotekanauki.pl/articles/320569.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
GNSS
Galileo
EDAS
tracking
firefighting
multisensor
fusion
communication optimization
Opis:
EDAS (EGNOS Data Access Service) is the EGNOS internet broadcast service, which provides free of charge access to the data collected and generated by the EGNOS infrastructure. EDAS disseminates over the Internet, both in real time and via an FTP archive, the raw data of the GPS, GLONASS (no commitment on GLONASS data is provided (1)) and EGNOS GEO satellites collected by the receivers located at the EGNOS reference stations, which are mainly distributed over Europe and North Africa. The EDAS services offer several types of GNSS data in various protocols and formats, such as DGNSS corrections. This paper reports on the results of some in-field tests conducted by ESSP and Topcon Agriculture to confirm the suitability of EDAS DGNSS corrections for precision farming in Europe. The European Commission (EC) is the owner of EGNOS system (including EDAS) and has delegated the exploitation of EGNOS to the European GNSS Agency (GSA). EDAS service provision is performed by ESSP, as EGNOS Services Provider, under contract with the GSA, the EGNOS program manager. In the ENC 2018 article “EDAS (EGNOS Data Access Service): Differential GPS corrections performance test with state-of-the-art precision agriculture system”, ESSP and Topcon Agriculture presented the results of the first in-field test conducted in a dynamic and real-life environment in the summer of 2017. The test results indicated that the EDAS DGNSS corrections could enable a reliable pass-to-pass accuracy performance for a wide range of precision agriculture applications and become an attractive solution for cereal farms, when the farm is located in the vicinity of an EGNOS reference station. In particular, Topcon Agriculture acknowledged that the observed performance was sufficient to support the following precision agriculture applications: spraying and spreading of any crop type, tilling and harvesting of cereal. Then, ESSP and Topcon Agriculture engaged in additional testing activities to further characterise the EDAS DGPS performance in different scenarios (i.e. at various European locations and with a variety of distances between the designated farm and the target EGNOS reference station). In each test, multiple runs with the rover tractors have been performed over the reference patterns predefined in the Topcon guidance systems. Data recorded during the tests has been analysed in detail, looking at the key performance indicators (e.g. cross track error and pass-to-pass performance) that characterize the EDAS DGPS performance for precision agriculture applications. Different techniques for the computation of the pass-to-pass accuracy performance have been used, including a procedure to measure live in the field and a post-processing alternative. The diversity of scenarios available allows drawing conclusions on the applicability of EDAS DGPS corrections (in terms of maximum distance from the target EGNOS station) for precision agriculture and also understanding the impact of operationally relevant aspects such as the quality of the mobile internet coverage (highly variable across Europe). The EDAS system and its architecture, the main types of data disseminated through EDAS services and the online information available to the EDAS users are introduced in this paper. In particular, the EDAS Ntrip service is described in detail, since it provides the differential corrections to the GPS and GLONASS satellites at the EGNOS reference stations in RTCM format, which are the basis for the present study. The article also reports on the results of the latest tests, which have been performed using Topcon receivers, vehicles and auto-steering systems. In all cases, two different Topcon guidance systems on board tractors were running simultaneously to assess the EDAS DGPS positioning performance with respect to a the reference provided by a top-performing RTK-based Topcon solution. The objective of this paper is to draw conclusions on the use of EDAS DGPS corrections as a reliable free-of-charge alternative for precision farming in Europe (especially for cereal farms), based on the available performance results from the testing campaign and the feedback from the involved precision agriculture experts.
Źródło:
Annual of Navigation; 2019, 26; 46-58
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical and chemical characterization of masa and tortillas from parental lines, crosses, and one hybrid
Autorzy:
Valderrama-Bravo, C.
Dominguez-Pacheco, A.
Hernandez-Aguilar, C.
Zepeda-Bautista, R.
del Real-Lopez, A.
Pahua-Ramos, M.E.
Arellano-Vazquez, J.L.
Moreno-Martinez, E.
Powiązania:
https://bibliotekanauki.pl/articles/24739.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
In maize plant breeding aimed at producing a hybrid, it is necessary to characterize the parents and hybrids by their agronomic aspects and grain quality so that the processing industry may offer consumers a quality product and also improve its efficiency. This study evaluated the viscoelastic parameters of masa and the chemical and texture properties of tortillas obtained from parent lines (M-54, M55, and CML-242), two single crosses (M54xM55 and M55xM54), and one hybrid (H-70). The morpho- logy of the maize grains and tortillas was analyzed using scanning electron microscopy. The firmness of masa obtained from CML-242 and H-70 maize was higher than that from the other maize genotypes. M-54 tortillas showed the lowest crude fiber content. Otherwise, tortillas obtained from the M55xM54 hard grain had the lowest fat content and extensibility, while H-70 tortillas showed an intermediate breaking point and extensibility. M-54 and M54xM55 tortillas were softer due to their more swollen starch granules. In contrast, rigid tortillas were obtained from CML-242 and H-70. Grain hardness causes different morphology in starch and tortilla of maize genotypes. However, grain hardness did not influence the characteristics of texture in tortillas.
Źródło:
International Agrophysics; 2017, 31, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occurrence of mycotoxins in talkan: a cereal-based food traditional for Turkic population
Autorzy:
Tattibayeva, D.
Nebot, C.
Miranda J.M.
Abuova, A.B.
Kizatova, M.Z.
Vazquez, B.
Powiązania:
https://bibliotekanauki.pl/articles/2087741.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
food-contamination
corn
fungi
HPLC-MS/MS
Kazakhstan
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 2; 333-341
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two cases of phase-shifting interferometry for wave front recovery from heterodyne hologram storage: piezoelectric transducer and modulation of polarization
Autorzy:
Rodríguez-Zurita, G.
Vázquez-Castillo, J. F.
Toto-Arellano, N. I.
Calderón-Hernández, G.
Barojas-Gutiérrez, E.
Powiązania:
https://bibliotekanauki.pl/articles/173402.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
holographic interferometry
phase-shifting
polarization
Opis:
Heterodyne holographic interferometry is a well-known interferometric technique for high precision measurements of the phase difference between two recorded wave fronts. These wave fronts are typically registered at a given distance from the object under inspection. Although the affinity of heterodyne techniques with the phase-shifting ones is immediate, reports on concrete implemented set-ups from the former type of techniques as adaptations into the second type seems to be not so widely spread as convenient. To illustrate this point, in this communication we demonstrate two phase-shifting methods as applied to heterodyne holograms, each variant using a different shifting method for phase shifting. One method is based on a conventional piezoelectric stack transducer and the other method comprises modulation of polarization. The alternatives that these two techniques offer could be of direct benefit in dynamic holography.
Źródło:
Optica Applicata; 2017, 47, 4; 579-590
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Airborne pollen of Carya, Celtis, Cupressus, Fraxinus and Pinus in the metropolitan area of Monterrey Nuevo Leon, Mexico
Autorzy:
Rocha-Estrada, A
Alvarado-Vazquez, M.A.
Torres-Cepeda, T.E.
Foroughbakhch-Pournavab, R.
Hernandez-Pinero, J.L.
Powiązania:
https://bibliotekanauki.pl/articles/51592.pdf
Data publikacji:
2008
Wydawca:
Instytut Medycyny Wsi
Tematy:
Pinus
pollen grain
Celtis
metropolitan area
airborne pollen
Carya
street
private garden
public park
Mexico
Nuevo Leon
plant
atmosphere
Monterrey
garden
Cupressus
Fraxinus
Źródło:
Annals of Agricultural and Environmental Medicine; 2008, 15, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lanczos potential for the Weyl tensor
Autorzy:
Morales, J.
Ovando, G.
López-Bonilla, J.
López-Vázquez, R.
Powiązania:
https://bibliotekanauki.pl/articles/1164250.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
2-spinors
Conformal tensor
Lanczos generator
Newman-Penrose formalism
Petrov classification
Spin coefficients
Weyl-Lanczos equations
Opis:
For arbitrary spacetimes with Petrov types O, N and III, we indicate general results about the Lanczos potential for the corresponding Weyl tensor.
Źródło:
World Scientific News; 2018, 108; 237-244
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some applications of Noether’s theorem
Autorzy:
Montiel-Pérez, J. Yaljá
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:
https://bibliotekanauki.pl/articles/1166045.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Complex Riemann-Silberstein vector
Duality rotations
Ignorable variable
Invariance of the action
Lanczos variational method
Linear differential equation of second order
Maxwell equations
Noether’s theorem
Variation of parameters
Variational symmetry
Opis:
If the action S= ∫_(t_1)^(t_2)▒〖L(q,〗 (q,) ̇t) dt is invariant under the infinitesimal transformation t ̃=t+ε τ(q,t), q ̃_r= q_r+ε ξ_r (q,t),r=1,… ,n, with ε=constant ≪1, then the Noether’s theorem permits to construct the corresponding conserved quantity. The Lanczos approach employs to ε= q_(n+1) as a new degree of freedom, thus the Euler-Lagrange equation for this new variable gives the Noether’s constant of motion. Torres del Castillo and Rubalcava-García showed that each variational symmetry implies the existence of an ignorable coordinate; here we apply the Lanczos approach to the Noether’s theorem to motivate the principal relations of these authors. The Maxwell equations without sources are invariant under duality rotations, then we show that this invariance implies, via the Noether’s theorem, the continuity equation for the electromagnetic energy. Besides, we demonstrate that if we know one solution of p(x)y''+q(x)y'+r(x)y=0, then this Lanczos technique allows obtain the other solution of this homogeneous linear differential equation.
Źródło:
World Scientific News; 2018, 106; 69-80
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Investigation of ZnO Nanowires
Autorzy:
Martínez-Criado, G.
Hernández-Vélez, M.
Letard, I.
Cros, A.
Cantarero, A.
Mínguez-Bacho, I.
Susini, J.
Tucoulou, R.
Sans, J.
Sanz, R.
Vázquez, M.
Powiązania:
https://bibliotekanauki.pl/articles/1539044.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
85.75.-d
61.10.Ht
78.70.En
81.05.Ea
Opis:
In this study we report the application of synchrotron X-ray fluorescence, photoluminescence and Raman scattering techniques to the analysis of the incorporation of impurities in unintentionally doped ZnO nanowires. Highly ordered one-dimensional ZnO arrays were fabricated by an oxidation process of Zn metal electrodeposited in nanoporous anodic alumina template. X-ray fluorescence data show the contribution of residual elements into the ZnO nanowires growth. A rough analytical quantification of the main light and heavy chemical contents derives impurity concentrations below 1%. The optical efficiency of ZnO nanowires is strongly affected by non-radiative centers up to temperatures as low as 100 K. The photoluminescence was found to be totally dominated by optical transitions associated with the anodic alumina template. Finally, the Raman scattering provides no evidence of local vibrational modes or secondary phases, but it shows the unambiguous signature of the ZnO hexagonal phase.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 369-373
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen Assisted Cracking in a Microalloyed Steel Subjected to a Rapid Thermal Cycle at High Temperature
Autorzy:
Lopez-Martinez, E.
Vázquez-Gómez, O.
Vergara-Hernández, H. J.
Campillo, B.
Powiązania:
https://bibliotekanauki.pl/articles/352035.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
persistent slip mark
fatigue crack growth
hydrogen enhanced local plasticity
microalloyed steel
Opis:
In a martensitic-bainitic microalloyed steel, the effect of hydrogen on fatigue crack growth was studied using rotary bending fatigue tests. The steel was subjected to a rapid thermal cycle to get a microstructure similar to that which would be formed within the coarse-grained heat-affected zone of a weld. Crack growth was monitored as a function of the number of cycles applied during fatigue tests on three types of specimens: 1) those without hydrogen charge, 2) those charged with hydrogen and 3) those charged with hydrogen which was then discharged through low-temperature heat treatment. All types showed persistent slip marks, and cracks propagated along high-shear-stress planes. In the presence of hydrogen, crack growth was affected by microstructural defects caused by the hydrogen charging process, and the persistent slip marks developed in an area closer to the crack tip and crack path. On the contrary, without hydrogen, crack growth occurred perpendicular to the applied force, and the persistent slip marks were fewer in number and further from the crack tip and crack path. This indicates that the plasticity increased (i.e., the damage that occurred in the presence of hydrogen matched the hydrogen-enhanced local plasticity mechanism).
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 315-321
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of sub-channel based Málaga atmospheric optical links with real β parameter
Autorzy:
López-González, F. J.
Jurado-Navas, A.
Garrido-Balsells, J. M.
Castillo-Vázquez, M.
Puerta-Notario, A.
Powiązania:
https://bibliotekanauki.pl/articles/174807.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Malaga distribution
generalized-K distribution
atmospheric optical communications
atmospheric propagation
atmospheric turbulence
scintillation
Opis:
A generalization of the Málaga atmospheric optical communications links treated as a finite number of generalized-K distributed sub-channels is analyzed in terms of outage probability and outage rate when its β parameter belongs to the set of real numbers. To the best of the author’s knowledge, this is the first time that β ∈ ℜ is considered. The new analytical expressions derived in this paper lead to a new physical and more realistic interpretation of atmospheric optical links, especially in terms of performance.
Źródło:
Optica Applicata; 2017, 47, 4; 545-556
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An alternative to Gower’s inverse matrix
Autorzy:
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:
https://bibliotekanauki.pl/articles/1177483.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adjoint matrix
Characteristic equation
Eigenvalue problem
Faddeev-Sominsky’s method
Gower’s pseudoinverse matrix
Leverrier-Takeno’s algorithm
Opis:
We show that the Faddeev-Sominsky’s process allows construct a natural inverse for any square matrix, which is an alternative to the inverse obtained by Gower.
Źródło:
World Scientific News; 2018, 102; 166-172
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linearization of (second order operator)1/2
Autorzy:
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:
https://bibliotekanauki.pl/articles/1164128.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cauchy-Riemann conditions
Laplacian operator
Pauli matrices
Weyl and Dirac equations
Opis:
We illustrate by means of the Pauli matrices how to linearize (second order operator)1/2 associated to the Weyl and Dirac equations. Besides, we exhibit the square root of the two dimensional Laplacian operator.
Źródło:
World Scientific News; 2018, 108; 224-228
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Matrices and orthogonal polynomials
Autorzy:
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:
https://bibliotekanauki.pl/articles/1177448.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Chebyshev
Hermite
Laguerre and Legendre polynomials
Lanczos algorithm
Leverrier-Takeno’s method
Three-member recurrence
Opis:
The Lanczos algorithm of minimized iterations shows that a polynomial verifying a three-term recurrence relation can be written as the determinant of a tridiagonal matrix, here we exhibit examples of this property. Besides, for several orthogonal polynomials, Cohen proved that their roots are the proper values of symmetric tridiagonal matrices; here we give examples of this Cohen’s result for the Legendre, Laguerre, and Hermite polynomials, which are important in applications to numerical analysis and quantum mechanics.
Źródło:
World Scientific News; 2018, 103; 234-241
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moore-Penrose’s inverse and solutions of linear systems
Autorzy:
López-Bonilla, J.
López-Vázquez, R.
Vidal-Beltrán, S.
Powiązania:
https://bibliotekanauki.pl/articles/1177742.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Least squares technique
Linear systems
Pseudoinverse of Moore-Penrose
SVD
Opis:
We employ the generalized inverse matrix of Moore-Penrose to study the existence and uniqueness of the solutions for over- and under-determined linear systems, in harmony with the least squares method.
Źródło:
World Scientific News; 2018, 101; 246-252
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł

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