211 research outputs found
Information Exchange for Connection Dispatching
Travellers in public transport today expect current, precise and individual information. Existing systems have different approaches to provide this information. Most of them use proprietary exchange formats as existing standardized interfaces do not fulfil all needs. The German standardization project IP-KOM-OeV develops an interface that fulfils focuses on a service which allows to inform the traveller about his connections but also to inform the transportation companies about the travellers’ planned connections. The latter can have a direct impact on the operations when the connection demands are taken into consideration for the connection dispatching. We will present the results of the standardization project regarding the connection service and show how this service can be used by transportation companies to improve connection dispatching
Повышение ресурсоэффективности процесса приготовления высокооктановых бензинов методом математического моделирования
В работе рассмотрен способ повышения ресурсоэффективности процесса производства высокооктановых бензинов разработкой и применением прогностической математической модели изомеризации прямогонных бензиновых фракций. Проведена оценка внедрения технологии каталитической изомеризации С7 фракции в структуры действующих нефтеперерабатывающих предприятий.The method of increasing the resource efficiency of the process of production of high-octane gasoline by developing and using the predictive mathematical model of isomerization of straight-flow gasoline fractions is considered. The estimation of the introduction of the technology of catalytic isomerization of the C7 fraction into the structures of existing refineries is carried out
Release Note -- Vbfnlo-2.6.0
Vbfnlo is a flexible parton level Monte Carlo program for the simulation of
vector boson fusion (VBF), double and triple vector boson (plus jet) production
in hadronic collisions at next-to-leading order (NLO) in the strong coupling
constant, as well as Higgs boson plus two jet production via gluon fusion at
the one-loop level. This note briefly describes the main additional features
and processes that have been added in the new release -- Vbfnlo Version 2.6.0.
At NLO QCD diboson production (W\gamma, WZ, ZZ, Z\gamma and \gamma\gamma),
same-sign W pair production via vector boson fusion and the process
W\gamma\gamma j have been implemented (for which one-loop tensor integrals up
to six-point functions are included). In addition, gluon induced diboson
production can be studied separately at the leading order (one-loop) level. The
diboson processes WW, WZ and W\gamma can be run with anomalous gauge boson
couplings, and anomalous couplings between a Higgs and a pair of gauge bosons
is included in WW, ZZ, Z\gamma and \gamma\gamma diboson production. The code
has also been extended to include anomalous gauge boson couplings for single
vector boson production via VBF, and a spin-2 model has been implemented for
diboson pair production via vector boson fusion.Comment: 14 pages, 6 tables; new code available at
http://www-itp.particle.uni-karlsruhe.de/vbfnlo
Nonlocal mechanism for cluster synchronization in neural circuits
The interplay between the topology of cortical circuits and synchronized
activity modes in distinct cortical areas is a key enigma in neuroscience. We
present a new nonlocal mechanism governing the periodic activity mode: the
greatest common divisor (GCD) of network loops. For a stimulus to one node, the
network splits into GCD-clusters in which cluster neurons are in zero-lag
synchronization. For complex external stimuli, the number of clusters can be
any common divisor. The synchronized mode and the transients to synchronization
pinpoint the type of external stimuli. The findings, supported by an
information mixing argument and simulations of Hodgkin Huxley population
dynamic networks with unidirectional connectivity and synaptic noise, call for
reexamining sources of correlated activity in cortex and shorter information
processing time scales.Comment: 8 pges, 6 figure
HiggsBounds: Confronting Arbitrary Higgs Sectors with Exclusion Bounds from LEP and the Tevatron
HiggsBounds is a computer code that tests theoretical predictions of models
with arbitrary Higgs sectors against the exclusion bounds obtained from the
Higgs searches at LEP and the Tevatron. The included experimental information
comprises exclusion bounds at 95% C.L. on topological cross sections. In order
to determine which search topology has the highest exclusion power, the program
also includes, for each topology, information from the experiments on the
expected exclusion bound, which would have been observed in case of a pure
background distribution. Using the predictions of the desired model provided by
the user as input, HiggsBounds determines the most sensitive channel and tests
whether the considered parameter point is excluded at the 95% C.L. HiggsBounds
is available as a Fortran 77 and Fortran 90 code. The code can be invoked as a
command line version, a subroutine version and an online version. Examples of
exclusion bounds obtained with HiggsBounds are discussed for the Standard
Model, for a model with a fourth generation of quarks and leptons and for the
Minimal Supersymmetric Standard Model with and without CP-violation. The
experimental information on the exclusion bounds currently implemented in
HiggsBounds will be updated as new results from the Higgs searches become
available.Comment: 64 pages, 15 tables, 8 figures; three typos which made it to the
published version corrected; the code (currently version 3.0.0beta including
LHC Higgs search results) is available via:
http://projects.hepforge.org/higgsbounds
Physics searches at the LHC
With the LHC up and running, the focus of experimental and theoretical high
energy physics will soon turn to an interpretation of LHC data in terms of the
physics of electroweak symmetry breaking and the TeV scale. We present here a
broad review of models for new TeV-scale physics and their LHC signatures. In
addition, we discuss possible new physics signatures and describe how they can
be linked to specific models of physics beyond the Standard Model. Finally, we
illustrate how the LHC era could culminate in a detailed understanding of the
underlying principles of TeV-scale physics.Comment: 184 pages, 55 figures, 14 tables, hundreds of references; scientific
feedback is welcome and encouraged. v2: text, references and Overview Table
added; feedback still welcom
Single Higgs-boson production at a photon-photon collider: general 2HDM versus MSSM
We revisit the production of a single Higgs boson from direct \gamma \gamma
-scattering at a photon collider. We compute the total cross section
\sigma(\gamma \gamma \to h) (for h=h0, H0, A0), and the strength of the
effective g_{h \gamma \gamma} coupling normalized to the Standard Model (SM),
for both the general Two-Higgs-Doublet Model (2HDM) and the Minimal
Supersymmetric Standard Model (MSSM). In both cases the predicted production
rates for the CP-even (odd) states render up to 10^4 (10^3) events per 500
\invfb of integrated luminosity, in full consistency with all the theoretical
and phenomenological constraints. Depending on the channel the maximum rates
can be larger or smaller than the SM expectations, but in most of the parameter
space they should be well measurable. We analyze how these departures depend on
the dynamics underlying each of the models, supersymmetric and
non-supersymmetric, and highlight the possible distinctive phenomenological
signatures. We demonstrate that this process could be extremely helpful to
discern non-supersymmetric Higgs bosons from supersymmetric ones. Furthermore,
in the MSSM case, we show that \gamma\gamma-physics could decisively help to
overcome the serious impasse afflicting Higgs boson physics at the infamous
"LHC wedge".Comment: LaTeX, 16 pages, 6 Figures, 2 Tables. Minor typos fixed. Matches
published version in Phys. Lett.
- …