Resultats globals: 9 registres trobats en 0.02 segons.
Articles, 9 registres trobats
Articles 9 registres trobats  
61 p, 718.5 KB Weighted Hardy spaces associated with elliptic operators. Part II : characterizations of h1 L (w) / Martell, José María (Instituto de Ciencias Matemáticas (Madrid, Espanya)) ; Prisuelos-Arribas, Cruz (Instituto de Ciencias Matemáticas (Madrid, Espanya))
Given a Muckenhoupt weight w and a second order divergence form elliptic operator L, we consider different versions of the weighted Hardy space H1 L (w)defined by conical square functions and non-tangential maximal functions associated with the heat and Poisson semigroups generated by L. [...]
2018 - 10.5565/PUBLMAT6221806
Publicacions matemàtiques, Vol. 62 Núm. 2 (2018) , p. 475-535 (Articles)  
18 p, 2.0 MB Evolutionary diversification and characterization of the eubacterial gene family encoding DXR type II, an alternative isoprenoid biosynthetic enzyme / Carretero-Paulet, Lorenzo (Instituto de Biología Molecular y Celular de Plantas) ; Lipska, Agnieszka (Instituto de Biología Molecular y Celular de Plantas) ; Pérez-Gil, Jordi (Centre de Recerca en Agrigenòmica) ; Sangari, Félix J. (Universidad de Cantabria. Departamento de Biología Molecular) ; Albert, Victor A. (Instituto de Biología Molecular y Celular de Plantas) ; Rodriguez-Concepción, Manuel (Centre de Recerca en Agrigenòmica)
Background: isoprenoids constitute a vast family of natural compounds performing diverse and essential functions in all domains of life. In most eubacteria, isoprenoids are synthesized through the methylerythritol 4-phosphate (MEP) pathway. [...]
2013 - 10.1186/1471-2148-13-180
BMC evolutionary biology, Vol. 13 (2013) , art. 180  
11 p, 598.6 KB Centers: their integrability and relations with the divergence / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
This is a brief survey on the centers of the analytic differential systems in R^2. First we consider the kind of integrability of the different types of centers, and after we analyze the focus--center problem, i. [...]
2016 - 10.21042/AMNS.2016.1.00007
Applied Mathematics and Nonlinear Sciences, Vol. 1 Núm. 1 (2016) , p. 79-86  
20 p, 360.1 KB Divergence and Poincaré-Liapunov constants for analytic differential systems / Grau, Maite (Universitat de Lleida. Departament de Matematica) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We consider a planar autonomous real analytic differential system with a monodromic singular point p. We deal with the center problem for the singular point p. Our aim is to highlight some relations between the divergence of the system and the Poincar\'e-Liapunov constants of p when these are defined.
2015 - 10.1016/j.jde.2015.01.035
Journal of Differential Equations, Vol. 258 (2015) , p. 4348-4367  
18 p, 277.1 KB The solution of the Kato problem in two dimensions / Hofmann, Steve (University of Missouri-Columbia. Department of Mathematics) ; McIntosh, Alan (Australian National University. Centre for Mathematics and its Applications)
We solve, in two dimensions, the “square root problem of Kato”. That is, for L ≡ − div(A(x)∇), where A(x) is a 2 × 2 accretive matrix of bounded measurable complex coefficients, we prove that L1/2 : L2 1(R2) → L2(R2).
2002 - 10.5565/PUBLMAT_Esco02_06
Publicacions matemàtiques, Vol. Extra (2002) , p. 143-160  
26 p, 431.0 KB Layer potentials beyond singular integral operators / Rosén, A.
We prove that the double layer potential operator and the gradient of the single layer potential operator are L2 bounded for general second order divergence form systems. As compared to earlier results, our proof shows that the bounds for the layer potentials are independent of well posedness for the Dirichlet problem and of De Giorgi-Nash local estimates. [...]
2013 - 10.5565/PUBLMAT_57213_08
Publicacions matemàtiques, Vol. 57, Núm. 2 (2013) , p. 429-454  
14 p, 327.2 KB Facial Expression Recognition Using New Feature Extraction Algorithm / Huang, Hung-Fu (National Cheng Kung University (Taiwan). Department of Electrical Engineering) ; Tai, Shen-Chuan (National Cheng Kung University (Taiwan). Department of Electrical Engineering)
This paper proposes a method for facial expression recognition. Facial feature vectors are generated from keypoint descriptors using Speeded-Up Robust Features. Each facial feature vector is then normalized and next the probability density function descriptor is generated. [...]
2012 - 10.5565/rev/elcvia.451
ELCVIA : Electronic Letters on Computer Vision and Image Analysis, Vol. 11, Núm. 1 (2012) , p. 41-54  
19 p, 196.1 KB Lp bounds for Riesz transforms and square roots associated to second order elliptic operators / Hofmann, Steve ; Martell, José María
We consider the Riesz transforms ∇L−1/2, where L≡− divA(x)∇, and A is an accretive, n × n matrix with bounded measurable complex entries, defined on Rn. We establish boundedness of these operators on Lp(Rn), for the range pn < p ≤ 2, where pn = 2n/(n + 2), n ≥ 2, and we obtain a weak-type estimate at the endpoint pn. [...]
2003 - 10.5565/PUBLMAT_47203_12
Publicacions matematiques, V. 47 N. 2 (2003) , p. 497-515  
26 p, 155.5 KB Explorant les possibilitats transformatives de la pràctica educativa : el coneixement antropològic aplicat a la formació de mestres / Soto Marata, Josefa (Universitat Autònoma de Barcelona. Departament d'Antropologia Social i Cultural)
Durant dos cursos escolars s'ha dut a terme un procés de formació de mestres per a la millora de les relacions interculturals a l'escola, mitjançant seminaris, a tres centres d'Educació Infantil i Primària públics de Catalunya. [...]
A lo largo de dos cursos escolares se llevó a cabo un proceso de formación de maestros, mediante seminarios, en tres centros públicos de Educación Infantil y Primaria de Cataluña, con el objetivo de mejorar las relaciones interculturales en la escuela. [...]
A program of teacher's trainning has been developed in three public elementary and primary schools, in a period of two years. The main goal was to improve intercultural relationships in school. The sociol-antropological app roach and the consideration that each member of the group is a cultural subjectect a r e the new features of this p roposal, which has let the transformation of the socio-cultural relationships and the educational task in minority grops with isolation risks.

Educar, N. 24 (1999) , p. 131-155  

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