1,592 research outputs found
A Method for siting and prioritizing the removal of derelict vessels in Florida Coastal Waters: test applications in the Florida Keys
Increased boating activities and new waterfront developments have contributed an
estimated 3,000 dismantled, abandoned, junked, wrecked, derelict vessels to Florida
coastal waters. This report outlines a method of siting and prioritizing derelict vessel
removal using the Florida Keys as a test area. The data base was information on 240
vessels, obtained from Florida Marine Patrol files. Vessel location was plotted on 1:250,000
regional and 1:5,000 and 1:12,000 site maps. Type of vessel, length, hull material, engine,
fuel tanks, overall condition, afloat and submerged characteristics, and accessibility, were
used to derive parametric site indices of removal priority and removal difficulty.
Results indicate 59 top priority cases which should be the focus of immediate clean
up efforts in the Florida Keys. Half of these cases are rated low to moderate in removal
difficulty; the remainder are difficult to remove. Removal difficulty is a surrogate for
removal cost: low difficulty -low cost, high difficulty - high cost. The rating scheme offers
coastal planners options of focusing removal operations either on (1) specific areas with
clusters of high priority derelict vessels or on (2) selected targeted derelicts at various,
specific locations. (PDF has 59 pages.
Job Management and Task Bundling
High Performance Computing is often performed on scarce and shared computing
resources. To ensure computers are used to their full capacity, administrators
often incentivize large workloads that are not possible on smaller systems.
Measurements in Lattice QCD frequently do not scale to machine-size workloads.
By bundling tasks together we can create large jobs suitable for gigantic
partitions. We discuss METAQ and mpi_jm, software developed to dynamically
group computational tasks together, that can intelligently backfill to consume
idle time without substantial changes to users' current workflows or
executables.Comment: 8 pages, 3 figures, LATTICE 2017 proceeding
Solutions of the Yang-Baxter Equation with Extra Non-Additive Parameters II: }
The type-I quantum superalgebras are known to admit non-trivial one-parameter
families of inequivalent finite dimensional irreps, even for generic . We
apply the recently developed technique to construct new solutions to the
quantum Yang-Baxter equation associated with the one-parameter family of irreps
of , thus obtaining R-matrices which depend not only on a
spectral parameter but in addition on further continuous parameters. These
extra parameters enter the Yang-Baxter equation in a similar way to the
spectral parameter but in a non-additive form.Comment: 10 pages, LaTex file (some errors in the Casimirs corrected
On Type-I Quantum Affine Superalgebras
The type-I simple Lie-superalgebras are and . We study
the quantum deformations of their untwisted affine extensions
and . We identify additional
relations between the simple generators (``extra -Serre relations") which
need to be imposed to properly define \uqgh and . We
present a general technique for deriving the spectral parameter dependent
R-matrices from quantum affine superalgebras. We determine the R-matrices for
the type-I affine superalgebra in various representations,
thereby deriving new solutions of the spectral-dependent Yang-Baxter equation.
In particular, because this algebra possesses one-parameter families of
finite-dimensional irreps, we are able to construct R-matrices depending on two
additional spectral-like parameters, providing generalizations of the
free-fermion model.Comment: 23 page
Zur Theorie des Condensators
Selbstrezension Gustav R. Kirchhoffs zu seinem Aufsatz: Zur Theorie des Condensators In: Monatsberichte der Königlich Preußischen Akademie der Wissenschafte zu Berlin. 1877, S. 144-16
Recent Legal Lit
Willoughby: The American Constitutional System; Ingersoll: Handbook of the Law of Public Corporations; Gilbert (ed.): Street Railway Reports, Annotated; Patterson: The United States and the States Under the Constitutio
Ueber Reflexion und Brechung des Lichtes an der Grenze krystallinischer Mittel
Selbstrezension Gustav R. Kirchhoffs zu seinem Aufsatz: Ueber Reflexion und Brechung des Lichtes an der Grenze krystallinischer Mittel In: Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin. Phys. Abth. 2. 1876, S. 57-8
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