Search results for "35"
showing 10 items of 2413 documents
Correlaciones invariantes de objetos tridimensionales
2009
La detección de objetos tridimensionales (3D) puede considerarse, hasta cierto punto, como una extensión al reconocimiento clásico en el caso bidimensional. Son múltiples las aplicaciones prácticas de este campo, como por ejemplo las militares, las relacionadas con el tráfico, médicas, etc. Una de las mayores dificultades que se presenta en el reconocimiento de objetos, ya sea 2D o 3D, es la diversidad de alteraciones que puede presentar el objeto que queremos reconocer. En general, una modificación del objeto dificulta o imposibilita su detección. Así, se hace necesario el desarrollo de técnicas específicas para reconocer un mismo objeto de manera invariante a una alteración concreta o un …
Compensación de la dispersión cromática asociada a la propagación de la luz en el espacio libre. Diseño de dispositivos acromáticos basados en la dif…
2002
El gran interés suscitado por las técnicas de tratamiento óptico de la información durante las últimas décadas tiene su origen, al menos parcialmente, en la capacidad inherente que presentan los sistemas ópticos para la manipulación en paralelo a la velocidad de la luz, de señales de entrada bidimensionales, en contraste con el tratamiento en serie de los sistemas electrónicos de procesado digital. Sin embargo, los procesadores coherentes son sistemas que proporcionan una redundancia nula en el tratamiento de la información, por lo que son muy vulnerables al ruido coherente generado por la presencia de polvo o defectos en los elementos ópticos. Por todo ello, a parte de este procesado conve…
Coherence in ultrashort light pulses and applications in temporal optics.
2008
In the last decades, the generation of lasers delivering pulses with durations in the order of femtosecond has constituted an important research topic for the Physics and Engineering communities. The characteristics of this kind of radiation, i.e., broadband spectrum, enormous temporal resolution, high peak-power with low energy average, potentially high repetition rate and high spatial coherence make it an indispensable tool in order to develop many applications in different fields of science and technology. Ultrafast laser technology is ready to offer real world applications ranging from high-tech, such us high-speed circuit testing and biological imaging, to more industrial applications …
Upward Voice: Participative Decision Making, Trust in Leadership and Safety Climate Matter
2020
A supportive upward voice environment is critical in nuclear power plants in order to provide energy in a sustainable manner. In high&ndash
Families of solutions to the KPI equation and the structure of their rational representations of order N
2018
We construct solutions to the Kadomtsev-Petviashvili equation (KPI) in terms of Fredholm determinants. We deduce solutions written as a quotient of wronskians of order 2N. These solutions called solutions of order N depend on 2N − 1 parameters. They can also be written as a quotient of two polynomials of degree 2N (N + 1) in x, y and t depending on 2N − 2 parameters. The maximum of the modulus of these solutions at order N is equal to 2(2N + 1) 2. We explicitly construct the expressions until the order 6 and we study the patterns of their modulus in the plane (x, y) and their evolution according to time and parameters.
On a nonlinear Schrödinger equation for nucleons in one space dimension
2021
We study a 1D nonlinear Schrödinger equation appearing in the description of a particle inside an atomic nucleus. For various nonlinearities, the ground states are discussed and given in explicit form. Their stability is studied numerically via the time evolution of perturbed ground states. In the time evolution of general localized initial data, they are shown to appear in the long time behaviour of certain cases.
Pagamento mediante versamento su conto bancario e mora debendi nella disciplina in materia di ritardi di pagamento nelle transazioni commerciali
2008
Muovendo dalla decisione della Corte di giustizia delle CE del 3 aprile 2008, C-306/06, rela-tiva alla disciplina della mora del debitore contenuta nella direttiva 2000/35/CE sulla lotta contro i ritardi di pagamento nelle transazioni commerciali e nelle normative nazionali di attuazione, il lavoro si concentra sull’adempimento nelle obbligazioni di somma di denaro da eseguire tramite moneta scritturale e su ciò che, in considerazione del luogo, del tempo e del modo dell’adempimento, integri l’eventuale mora debendi. Oltre a delineare una sistemazione del dato normativo di riferimento e una soluzione ermeneutica differenti da quelle accolte dai giudici del Lussemburgo, lo studio affronta, d…
Prenatal air pollution exposure and growth and cardio-metabolic risk in preschoolers
2020
Objectives: We investigated the association between outdoor air pollutants exposure in the first trimester of pregnancy, and growth and cardio-metabolic risk at four years of age, and evaluated the mediating role of birth weight. Methods: We included mother-child pairs (N = 1,724) from the Spanish INMA birth cohort established in 2003-2008. First trimester of pregnancy nitrogen dioxide (NO2) and fine particles (PM2.5) exposure levels were estimated. Height, weight, waist circumference, blood pressure, and lipids were measured at four years of age. Body mass index (BMI) trajectories from birth to four years were identified. Results: Increased PM2.5 exposure in the first trimester of pregnanc…
Association of child maltreatment subtypes and long-term physical health in a German representative sample
2018
ABSTRACT Background: Child maltreatment is a major public problem, associated with enormous consequences on the individual and socioeconomic level. Studies show a clear impact of child maltreatment on long-term physical health. However, there is a lack of analyses comprising a wide variety of subtypes of maltreatment and addressing cumulative effects of different maltreatment subtypes experienced during childhood on physical health. Objective: The objective of this analysis was to assess the association of different subtypes and the intensity of child maltreatment with long-term physical health outcomes. Methods: In a cross-sectional observational approach, a representative sample of the Ge…