1,464 research outputs found
The use of provenance in information retrieval
Get PDFThe volume of electronic information that users accumulate is steadily rising. A recent study [2] found that there were on average 32,000 pieces of information (e-mails, web pages, documents, etc.) for each user. The problem of organizin
Finite-temperature hole dynamics in the t-J model: Exact results for high dimensions
Full text linkWe discuss the dynamics of a single hole in the t-J model at finite
temperature, in the limit of large spatial dimensions. The problem is shown to
yield a simple and physically transparent solution, that exemplifies the
continuous thermal evolution of the underlying string picture from the T=0
string-pinned limit through to the paramagnetic phase.Comment: 6 pages, including 2 figure
Local bifurcations in differential equations with state-dependent delay
Get PDFThis is the author accepted manuscript. The final version is available from AIP Publishing via the DOI in this record.A common task when analysing dynamical systems is the determination of normal forms near local bifurcations
of equilibria. As most of these normal forms have been classified and analysed, finding which particular class
of normal form one encounters in a numerical bifurcation study guides follow-up computations.
This paper builds on normal form algorithms for equilibria of delay differential equations with constant delay
that were developed and implemented in DDE-Biftool recently. We show how one can extend these methods
to delay-differential equations with state-dependent delay (sd-DDEs). Since higher degrees of regularity of
local center manifolds are still open for sd-DDEs, we give an independent (still only partial) argument which
phenomena from the truncated normal must persist in the full sd-DDE. In particular, we show that all
invariant manifolds with a sufficient degree of normal hyperbolicity predicted by the normal form exist also
in the full sd-DDEJ.S. gratefully acknowledges the financial support
of the EPSRC via grants EP/N023544/1 and
EP/N014391/1. J.S. has also received funding from the
European Union’s Horizon 2020 research and innovation
programme under Grant Agreement number 643073
Pimentas - muitos tipos, muitas opções.
Get PDFbitstream/CPACT-2010/12305/1/pimenta-Barbieri.pdfPublicado nos sites: Cultivar, em 08/12/2009, Jornal Diário da Manhã, em 09/12/2009, Portal do Agronegócio, em 09/12/2009, Agronline, em 09/12/2009 e no Infobibos, em 11/12/2009
Floricultura e cultivo comercial de flores de corte no Rio Grande do Sul Meridional.
Get PDFbitstream/item/33845/1/documento-201.pd
O setor produtivo de flores e plantas ornamentais nos Coredes Sul e Centro-Sul do Rio Grande do Sul.
Get PDFbitstream/item/33557/1/documento-145.pd
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