10,675 research outputs found
Considerations about Continuous Experimentation for Resource-Constrained Platforms in Self-Driving Vehicles
Autonomous vehicles are slowly becoming reality thanks to the efforts of many
academic and industrial organizations. Due to the complexity of the software
powering these systems and the dynamicity of the development processes, an
architectural solution capable of supporting long-term evolution and
maintenance is required.
Continuous Experimentation (CE) is an already increasingly adopted practice
in software-intensive web-based software systems to steadily improve them over
time. CE allows organizations to steer the development efforts by basing
decisions on data collected about the system in its field of application.
Despite the advantages of Continuous Experimentation, this practice is only
rarely adopted in cyber-physical systems and in the automotive domain. Reasons
for this include the strict safety constraints and the computational
capabilities needed from the target systems.
In this work, a concept for using Continuous Experimentation for
resource-constrained platforms like a self-driving vehicle is outlined.Comment: Copyright 2017 Springer. Paper submitted and accepted at the 11th
European Conference on Software Architecture. 8 pages, 1 figure. Published in
Lecture Notes in Computer Science vol 10475 (Springer),
https://link.springer.com/chapter/10.1007/978-3-319-65831-5_
Instantaneous Bethe-Salpeter Equation: Analytic Approach for Nonvanishing Masses of the Bound-State Constituents
The instantaneous Bethe-Salpeter equation, derived from the general
Bethe-Salpeter formalism by assuming that the involved interaction kernel is
instantaneous, represents the most promising framework for the description of
hadrons as bound states of quarks from first quantum-field-theoretic
principles, that is, quantum chromodynamics. Here, by extending a previous
analysis confined to the case of bound-state constituents with vanishing
masses, we demonstrate that the instantaneous Bethe-Salpeter equation for
bound-state constituents with (definitely) nonvanishing masses may be converted
into an eigenvalue problem for an explicitly - more precisely, algebraically -
known matrix, at least, for a rather wide class of interactions between these
bound-state constituents. The advantages of the explicit knowledge of this
matrix representation are self-evident.Comment: 12 Pages, LaTeX, 1 figur
Relativistic bound-state calculations in Light Front Dynamics
We calculated bound states in the quantum field theoretical approach. Using
the Wick-Cutkosky model and an extended version of this model (in which a
particle with finite mass is exchanged) we have calculated the bound states in
the scalar case.Comment: 3 pages, proceedings of the Light Cone Meeting Trento 2001, to be
published in Nucl. Phys. B - Proceedings Supplement
Instantaneous Bethe-Salpeter equation: improved analytical solution
Studying the Bethe-Salpeter formalism for interactions instantaneous in the
rest frame of the bound states described, we show that, for bound-state
constituents of arbitrary masses, the mass of the ground state of a given spin
may be calculated almost entirely analytically with high accuracy, without the
(numerical) diagonalization of the matrix representation obtained by expansion
of the solutions over a suitable set of basis states.Comment: 7 page
A semiclassical model of light mesons
The dominantly orbital state description is applied to the study of light
mesons. The effective Hamiltonian is characterized by a relativistic kinematics
supplemented by the usual funnel potential with a mixed scalar and vector
confinement. The influence of two different finite quark masses and potential
parameters on Regge and vibrational trajectories is discussed.Comment: 1 figur
The hypersonic laminar boundary layer approaching the base of a slender body.
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76455/1/AIAA-1968-67-699.pd
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