Search results for "second"
showing 10 items of 3671 documents
On singular integral and martingale transforms
2007
Linear equivalences of norms of vector-valued singular integral operators and vector-valued martingale transforms are studied. In particular, it is shown that the UMD(p)-constant of a Banach space X equals the norm of the real (or the imaginary) part of the Beurling-Ahlfors singular integral operator, acting on the X-valued L^p-space on the plane. Moreover, replacing equality by a linear equivalence, this is found to be the typical property of even multipliers. A corresponding result for odd multipliers and the Hilbert transform is given.
Coupled conditional backward sampling particle filter
2020
The conditional particle filter (CPF) is a promising algorithm for general hidden Markov model smoothing. Empirical evidence suggests that the variant of CPF with backward sampling (CBPF) performs well even with long time series. Previous theoretical results have not been able to demonstrate the improvement brought by backward sampling, whereas we provide rates showing that CBPF can remain effective with a fixed number of particles independent of the time horizon. Our result is based on analysis of a new coupling of two CBPFs, the coupled conditional backward sampling particle filter (CCBPF). We show that CCBPF has good stability properties in the sense that with fixed number of particles, …
An elementary formula for computing shape derivatives of EFIE system matrix
2012
We derive analytical shape derivative formulas of the system matrix representing electric field integral equation discretized with Raviart-Thomas basis functions. The arising integrals are easy to compute with similar methods as the entries of the original system matrix. The results are compared to derivatives computed with automatic differentiation technique and finite differences, and are found to be in excellent agreement.
A Multilayered Plate Theory with Transverse Shear and Normal Warping Functions
2016
A multilayered plate theory which takes into account transverse shear and normal stretching is presented. The theory is based on a seven-unknowns kinematic field with five warping functions. Four warping functions are related to the transverse shear behaviour, the fifth is related to the normal stretching. The warping functions are issued from exact three-dimensional solutions. They are related to the variations of transverse shear and normal stresses computed at specific points for a simply supported bending problem. Reddy, Cho-Parmerter and (a modified version of) Beakou-Touratier theories have been retained for comparisons. Extended versions of these theories, able to manage the normal s…
STABILITY OF A STOCHASTICALLY PERTURBED MODEL OF INTRACELLULAR SINGLE-STRANDED RNA VIRUS REPLICATION
2019
Compared to the replication of double-stranded RNA and DNA viruses, the replication of single-stranded viruses requires the production of a number of intermediate strands that serve as templates for the synthesis of genomic-sense strands. Two theoretical extreme mechanisms for replication for such single-stranded viruses have been proposed; one extreme being represented by the so-called linear stamping machine and the opposite extreme by the exponential growth. Of course, real systems are more complex and examples have been described in which a combination of such extreme mechanisms can also occur: a fraction of the produced progeny resulting from a stamping-machine type of replication that…
Adaptive and Creative Problem-Projects in the Teaching of Science. Description of the Methodology and Appreciation of the Students Involved
2019
En este artículo se describe la metodología que se ha denominado Aprendizaje Basadoen Problemas-Proyectos Adaptativos y Creativos (ABPac), utilizando como ejemplo algunos de losproyectos realizados en el centro concertado Jesús-María de Burgos durante diez años, entre 2006y 2016, con alumnos de Secundaria Obligatoria y Bachillerato. Esta metodología sugiere una aten-ción a la diversidad del alumnado considerando sus necesidades e inquietudes. Además, se analizacuantitativamente el resultado de la encuesta de percepción realizada a 73 individuos involucradosen esta metodología cuando ya ha transcurrido un tiempo de madurez y se encuentran finalizandosus carreras o con estas ya finalizadas. L…
La inferencia léxica en el aprendizaje de lenguas extranjeras : estudio de su aplicación por estudiantes de inglés empresarial
1996
Metabolic Pathway Analysis 2019: Systems (biology+medicine) : 12th-16th August 2019, Riga, Latvia
2019
Influència del sexe i l'edat en el raonament moral prosocial dels estudiants de secundària
2008
Aquest treball presenta una aproximació a l'estudi del raonament moral prosocial i de les variables que infl ueixen en el seu desenvolupament. L'objectiu principal és determinar en quina mesura la variable sexe i la variable edat infl ueixen en el raonament moral prosocial dels adolescents. L'estudi es realitza amb una mostra d'estudiants de secundària (n=114), homes i dones. Els resultats indiquen que les dues variables analitzades (sexe i edat) tenen un efecte signifi catiu sobre el raonament moral prosocial. Les dones, davant una situació d'ajudar o no l'altre, justifi quen la decisió en raons més abstractes i internalitzades, enfront dels homes, que se centren en l'aprovació i acceptaci…
Mitä oppilaat pitävät varhaisesta A1-kielen opetuksesta ja millainen käsitys heillä on omasta osaamisestaan?
2022
Vuoden 2020 alusta kieltenopiskelu on aloitettu Suomessa vuosiluokalla 1. Opetussuunnitelman perusteissa korostetaan, että opetuksen tulee olla ikätasolle sopivaa ja herättää myönteinen asenne kielenoppimiseen sekä vahvistaa oppilaan pystyvyyttä. Artikkelissa tarkastellaan suomen- ja ruotsinkielisten koulujen oppilaiden asennoitumista ja osaamiskäsityksiä. Tutkimuksen kohteen on englannin kielen (suomenkieliset koulut, n=106) ja suomi toisena kotimaisena kielenä -oppiaineen (ruotsinkieliset koulut, n=86) opiskelu. Tutkimus osoitti, että oppilaat pitivät pääosin niin opiskelemastaan kielestä kuin sen opiskelusta. He kokivat osaavansa tervehtimiseen, numeroihin ja väreihin liittyviä ilmaisuja…