Results 11 to 20 of about 1,625 (211)

Generalized boundary conditions for general relativity for the asymptotically flat case in terms of Ashtekar's variables [PDF]

open access: yes, 1995
There is a gap that has been left open since the formulation of general relativity in terms of Ashtekar's new variables namely the treatment of asymptotically flat field configurations that are general enough to be able to define the generators of the ...
Ashtekar A   +7 more
core   +2 more sources

Lasalocid awareness and sampling in Scotland [PDF]

open access: yes, 2010
Lasalocid is an ionophore antibiotic extensively used as a coccidiostat in poultry production. Lasalocid should not be fed to egg-laying hens as it accumulates in the eggs, and residues have often been found in eggs. Other ionophores are toxic to humans,
Roxburgh, J.W., Wong, R.Y.P.
core   +1 more source

Remarks on the Reduced Phase Space of (2+1)-Dimensional Gravity on a Torus in the Ashtekar Formulation [PDF]

open access: yes, 1997
We examine the reduced phase space of the Barbero-Varadarajan solutions of the Ashtekar formulation of (2+1)-dimensional general relativity on a torus.
A Mikovic   +5 more
core   +3 more sources

Recursos Web para el Mejor uso de las Suscripciones BEIC -Chile [PDF]

open access: yesInternational journal of odontostomatology, 2010
Con la aparicion de las practicas basadas en la evidencia, se hace cada dia mas necesario permanecer actualizado con los avances que tiene nuestra profesion en sus diversas areas. Lo anterior supone poder acceder a las fuentes primarias de esta informacion, como son los journals, los que muchas veces al ser de pago implican una gran barrera para su ...
openaire   +2 more sources

A new public policy to ensure access to scientific information resources: the case of Chile

open access: yesInsights: The UKSG Journal, 2012
The design and implementation of public policies to grant access to scientific information is now a marked trend among numerous countries of Latin America.
María Soledad Bravo-Marchant
doaj   +1 more source

Ashtekar Formulation of 2+1 Gravity on a Torus

open access: yes, 1992
Pure (2+1)-dimensional Einstein gravity is analysed in the Ashtekar formulation, when the spatial manifold is a torus. We have found a set of globally defined observables, forming a closed algebra. This allowed us to solve the quantum constraints, and to
Aleksandar Miković   +19 more
core   +1 more source

Hamiltonian dynamics for Einstein's action in G$\rightarrow$0 limit

open access: yes, 2011
The Hamiltonian analysis for the Einstein's action in $ G\to 0 $ limit is performed. Considering the original configuration space without involve the usual $ADM$ variables we show that the version $ Gto 0 $ for Einstein's action is devoid of physical ...
A. Ashtekar   +26 more
core   +1 more source

Animal welfare initiatives improve feather cover of cage-free laying hens in the UK [PDF]

open access: yes, 2016
This paper describes a case example where initiatives from private assurance schemes, scientists, charities, government and egg companies have improved the welfare of UK cage-free laying hens.
Atkinson, Chris   +7 more
core   +2 more sources

Advancing Energy Materials by In Situ Atomic Scale Methods

open access: yesAdvanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
Progress in in situ atomic scale methods leads to an improved understanding of new and advanced energy materials, where a local understanding of complex, inhomogeneous systems or interfaces down to the atomic scale and quantum level is required. Topics from photovoltaics, dissipation losses, phase transitions, and chemical energy conversion are ...
Christian Jooss   +21 more
wiley   +1 more source

Research on the BEIC Curriculum: Unveiling What Lies Under the Tip of the Iceberg

open access: yesLETRAS, 2008
Es un detenido análisis de la investigación The Value of Curricular lntrospection, en que se incorpora la realimentación dada por diversos participantes nacionales y extranjeros en el CILAP 2007, a quienes se les expuso los resultados iniciales de esta investigación. El estudio surgió de la disparidad de criterios entre diversos actores del BEIC, de la
Álvarez Martínez, Gustavo   +1 more
openaire   +3 more sources

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