2,723 research outputs found
On the efficient numerical solution of lattice systems with low-order couplings
We apply the Quasi Monte Carlo (QMC) and recursive numerical integration
methods to evaluate the Euclidean, discretized time path-integral for the
quantum mechanical anharmonic oscillator and a topological quantum mechanical
rotor model. For the anharmonic oscillator both methods outperform standard
Markov Chain Monte Carlo methods and show a significantly improved error
scaling. For the quantum mechanical rotor we could, however, not find a
successful way employing QMC. On the other hand, the recursive numerical
integration method works extremely well for this model and shows an at least
exponentially fast error scaling
EC66-1420 Nebraska Egg Production Prospectus
Extension Circular 66-1420: Nebraska Egg Production Prospectus; describe present egg industry, compare Nebraska to other states and areas in the United States, outline Nebraska assets for the egg industry, outline Nebraska’s liabilities, present a budget and cash flow for a 10,000 bird flock, and explain financing an expanded egg production enterprise
EC67-1421 Nebraska Turkey Production Prospectus
Extension Circular 67-1421 talks about past and predicts future prospects for turkey production in the US
The role of toll-like receptors (TLRs) in bacteria-induced maturation of murine dendritic cells (DCs) - Peptidoglycan and lipoteichoic acid are inducers of DC maturation and require TLR2
Toll-like receptors (TLRs) have been found to be key elements in pathogen recognition by the host immune system. Dendritic cells (DCs) are crucial for both innate immune responses and initiation of acquired immunity. Here we focus on the potential involvement of TLR ligand interaction in DC maturation. TLR2 knockout mice and mice carrying a TLR4 mutation (C3H/HeJ) were investigated for DC maturation induced by peptidoglycan (PGN), lipopolysaccharide (LPS), or lipoteichoic acids (LTAs). All stimuli induced maturation of murine bone marrow-derived DCs in control mice. TLR2− /− mice lacked maturation upon stimulation with PGN, as assessed by expression of major histocompatibility complex class II, CD86, cytokine, and chemokine production, fluorescein isothiocyanate-dextran uptake, and mixed lymphocyte reactions, while being completely responsive to LPS. A similar lack of maturation was observed in C3H/HeJ mice upon stimulation with LPS. DC maturation induced by LTAs from two different types of bacteria was severely impaired in TLR2− /−, whereas C3H/HeJ mice responded to LTAs in a manner similar to wild-type mice. We demonstrate that DC maturation is induced by stimuli from Gram-positive microorganisms, such as PGN and LTA, with similar efficiency as by LPS. Finally, we provide evidence that TLR2 and TLR4 interaction with the appropriate ligand is essential for bacteria-induced maturation of DCs
Diastereofacial selectivity in reactions of substituted cyclohexyl radicals. An experimental and theoretical study
Local bifurcations in differential equations with state-dependent delay
This 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
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