Results 91 to 100 of about 3,649,878 (351)
Angewandte Chemie International Edition, EarlyView.Using ammonia in combination with hypochlorites as simple oxidants under phase‐transfer conditions allows for the direct oxidative α‐amination of reactive enolate precursors such as cyclic β‐ketoesters, oxindoles, as well as malonitriles and malonates with good to excellent yields.
Christopher Mairhofer +6 more
wiley +1 more source
El Índice de Derechos de la Niñez en Colombia. Una perspectiva regional
Reflexión Política, 2007 Se construye el Índice de Derechos de la Niñez (IDN) para la primera infancia en cinco regiones colombianas (Atlántica, Oriental, Central, Pacifica y Bogotá) para los años 1995, 2000 y 2005.
Grupo de Investigación en Desarrollo Regional
doaj
Fast computation of a rational point of a variety over a finite field [PDF]
arXiv, 2004 We exhibit a probabilistic algorithm which computes a rational point of an absolutely irreducible variety over a finite field defined by a reduced regular sequence. Its time--space complexity is roughly quadratic in the logarithm of the cardinality of the field and a geometric invariant of the input system (called its degree), which is always bounded ...
arxiv
Deformation techniques for sparse systems [PDF]
arXiv, 2006 We exhibit a probabilistic symbolic algorithm for solving zero-dimensional sparse systems. Our algorithm combines a symbolic homotopy procedure, based on a flat deformation of a certain morphism of affine varieties, with the polyhedral deformation of Huber and Sturmfels.
arxiv
The Anatomical Record, EarlyView.Abstract Megantereon was a widespread saber‐toothed felid from the Pliocene and Pleistocene of the Old World and North America, but its rarity in the fossil record makes it complicated to restore its life appearance. Lack of complete specimens makes it necessary to combine information from fossils of different individuals to reconstruct their facial ...
Mauricio Antón +4 more
wiley +1 more source
A general numerical solution of dispersion relations for the nuclear optical model [PDF]
J.Phys. G27 (2001) B15-B20, 2001 A general numerical solution of the dispersion integral relation between the real and the imaginary parts of the nuclear optical potential is presented. Fast convergence is achieved by means of the Gauss-Legendre integration method, which offers accuracy, easiness of implementation and generality for dispersive optical model calculations.
arxiv
Batteries &Supercaps, Volume 8, Issue 3, March 2025.This work proposes the synthesis of carbon‐based nanostructured materials obtained using ZnO as both nanos‐ template and catalysts simultaneously. During the synthesis, GO was used as a stabiliser, preventing the collapse of the 3D structure and improving its properties in terms of capacitance and surface area.
Rusbel Coneo‐Rodríguez +5 more
wiley +1 more source
Desarrollo mundial evanescente
Economía UNAM, 2014 ResumenCon algunas diferencias menores en el mundo prevalecen dos estrategias paradigmáticas compatibles con el empuje de la globalización. Una está basada en la expansión del crédito como sustituto de la inversión y del empleo en la tarea de armonizar oferta y demanda agregadas en cada país.
openaire +4 more sources
Activism as a long durée journey: Teachers against the Chilean neoliberal education model
British Educational Research Journal, EarlyView.Abstract In this paper, I use the idea of purposes of education, particularly subjectification, and the concept of love to explore long‐term teacher activism in Chile. ‘Long‐term activism’ is used to describe an ongoing struggle rather than activism confined to specific moments.
Carla Tapia‐Parada
wiley +1 more source
, 2010 Aborda las nociones generales sobre las emociones y su desarrollo en niños y niñas hasta 7 ...
Armas, Rosa
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