396 research outputs found
Synovial sarcomas usually metastasize after >5 years: a multicenter retrospective analysis with minimum follow-up of 10 years for survivors
In SS, metastases develop late with high mortality. Patients with SS should be followed for >10 year
Pseudovector vs. pseudoscalar coupling in one-boson exchange NN potentials
We examine the effects of pseudoscalar and pseudovector coupling of the pi
and eta mesons in one-boson exchange models of the NN interaction using two
approaches: time-ordered perturbation theory unitarized with the relativistic
Lippmann-Schwinger equation, and a reduced Bethe-Salpeter equation approach
using the Thompson equation. Contact terms in the one-boson exchange amplitudes
in time-ordered perturbation theory lead naturally to the introduction of
s-channel nucleonic cutoffs for the interaction, which strongly suppresses the
far off-shell behavior of the amplitudes in both approaches. Differences
between the resulting NN predictions of the various models are found to be
small, and particularly so when coupling constants of the other mesons are
readjusted within reasonable limits.Comment: 24 pages, 4 figure
VANET Coverage Analysis for GPS Augmentation Data in Rural Area
The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.Enhanced position accuracy is key for modern navigation systems, location based
services and applications based on Inter-Vehicle Communication (IVC). Position data are
the foundation for deriving vehicle trajectories used for assessing a situation's criticality in
vehicle safety. Thus, especially Advanced Driver Assistance Systems (ADASs) and integral
safety applications bene t from nearby vehicles spreading their positions periodically with high
accuracy. Positioning based on Global Navigation Satellite System (GNSS) measurements can
be enhanced by established Cooperative Positioning (CP) methods like Real-Time Kinematic
(RTK) and Di fferential GNSS (DGNSS). Conventional CP relies on positioning correction
data from a third party, whereas this paper introduces a self-su fficient CP system based on
Precise Point Positioning (PPP) and Vehicular Ad-Hoc Network (VANET) technology requiring
no infrastructure. Furthermore, the data dissemination process and achievable coverage are
analysed by a simulation study for a rural area in Bavaria, Germany. For this purpose, the
simulation employs the European IVC protocol stack ITS-G5. While the general feasibility of
this CP approach could be assured, some remaining issues regarding employed network protocols
were discovered as well
Optimizing the laser absorption technique for quantification of caesium densities in negative hydrogen ion sources
Voreloxin, a first-in-class anticancer quinolone derivative, acts synergistically with cytarabine in vitro and induces bone marrow aplasia in vivo
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