1,237 research outputs found
Book review: Places of Nature in Ecologies of Urbanism Anne Rademacher and K Sivaramakrishnan (eds) . Hong Kong University Press, Hong Kong, 2017.
Places of Nature in Ecologies of Urbanism Anne Rademacher and K Sivaramakrishnan (eds) . Hong Kong University Press, Hong Kong, 2017, pp. xi +255 (ISBN 978-988-8930-60-1)
MRL voor oxaalzuur in honing
Oxaalzuur is onmisbaar voor de late herfst-/winterfase in de geïntegreerde bestrijding van de varroamijt (Varroa destructor). Daarom heeft de Europese Werkgroep voor Varroabestrijding een procedure opgestart bij de EMEA (EU Agentschap voor Evaluatie van Medische Producten) voor toelating van oxaalzuur als veterinair medicament. Onderdeel van de procedure was de opstelling van een MRL-dossier (Maximum Residu Level) over de toxiciteit van oxaalzuur en de mogelijke residuvorming in honing. Het resultaat van een en ander is dat oxaalzuur nu toegepast kan worden zonder dat een maximumgrens gesteld is voor residuen in honin
Riemann solvers and undercompressive shocks of convex FPU chains
We consider FPU-type atomic chains with general convex potentials. The naive
continuum limit in the hyperbolic space-time scaling is the p-system of mass
and momentum conservation. We systematically compare Riemann solutions to the
p-system with numerical solutions to discrete Riemann problems in FPU chains,
and argue that the latter can be described by modified p-system Riemann
solvers. We allow the flux to have a turning point, and observe a third type of
elementary wave (conservative shocks) in the atomistic simulations. These waves
are heteroclinic travelling waves and correspond to non-classical,
undercompressive shocks of the p-system. We analyse such shocks for fluxes with
one or more turning points.
Depending on the convexity properties of the flux we propose FPU-Riemann
solvers. Our numerical simulations confirm that Lax-shocks are replaced by so
called dispersive shocks. For convex-concave flux we provide numerical evidence
that convex FPU chains follow the p-system in generating conservative shocks
that are supersonic. For concave-convex flux, however, the conservative shocks
of the p-system are subsonic and do not appear in FPU-Riemann solutions
Automated glycan assembly of <sup>19</sup>F labelled glycan probes enables high‐throughput NMR studies of protein‐glycan interactions
Protein‐glycan interactions mediate important biological processes, including pathogen host invasion and cellular communication. Major challenges to monitoring these low affinity interactions are the required high sensitivity of a biophysical assay and to cover a breath of synthetic well‐defined structures. Here, we showcase an expedite approach that integrates automated glycan assembly (AGA) of 19 F labelled probes and high‐throughput NMR methods, enabling the study of protein‐glycan interactions. Synthetic Lewis type 2 antigens were screened against seven glycan binding proteins (GBPs), including DC‐SIGN and BambL, respectively involved in HIV‐1 and lung infections in immunocompromised patients, confirming the preference for fucosylated glycans (Le x , H type 2, Le y ). Previously unknown glycan‐lectin weak interactions were detected, and thermodynamic data were obtained. Enzymatic reactions were monitored in real‐time, delivering kinetic parameters. These results demonstrate the utility of AGA combined with 19 F NMR for the discovery and characterization of glycan‐protein interactions, opening up new perspectives for 19 F labelled complex glycans
Level density of a Fermi gas: average growth and fluctuations
We compute the level density of a two--component Fermi gas as a function of
the number of particles, angular momentum and excitation energy. The result
includes smooth low--energy corrections to the leading Bethe term (connected to
a generalization of the partition problem and Hardy--Ramanujan formula) plus
oscillatory corrections that describe shell effects. When applied to nuclear
level densities, the theory provides a unified formulation valid from
low--lying states up to levels entering the continuum. The comparison with
experimental data from neutron resonances gives excellent results.Comment: 4 pages, 1 figur
Закономерности изменения коэффициента динамичности в линии привода прокатной клети в процессе её работы
Показано, что процессе работы клети коэффициент динамичности на шпиндельном и моторном участках периодически существенно изменяется за счет износа сочленяемых элементов и развития зазоров. Установленные закономерности
позволяют прогнозировать максимальные динамические нагрузки в линии
привода
Quantum Invariants, Modular Forms, and Lattice Points II
We study the SU(2) Witten--Reshetikhin--Turaev invariant for the Seifert
fibered homology spheres with M-exceptional fibers. We show that the WRT
invariant can be written in terms of (differential of) the Eichler integrals of
modular forms with weight 1/2 and 3/2. By use of nearly modular property of the
Eichler integrals we shall obtain asymptotic expansions of the WRT invariant in
the large-N limit. We further reveal that the number of the gauge equivalent
classes of flat connections, which dominate the asymptotics of the WRT
invariant in N ->\infinity, is related to the number of integral lattice points
inside the M-dimensional tetrahedron
Central Florida Future, Vol. 23 No. 16, October 11, 1990
Engineering official dies of heart attack 62-year-old had chest pains, felt faint; \u27UCF\u27 will replace existing campus phone exchanges; Truck strikes, injures student riding bike near entrance to UCF;https://stars.library.ucf.edu/centralfloridafuture/2021/thumbnail.jp
- …