1,982 research outputs found
MEASURING HISTORICAL RISK IN QUARTERLY MILK PRICES
Various methods have been used to estimate risk indices with historical data. An industry perception of increasing milk price risk over time provides a standard for evaluating several techniques used to measure historical risk. Risk measures from a regression model and an ARIMA model were consistent with the perception of increasing risk.Risk and Uncertainty,
Evaluation of DSS-14 pedestal-review of top surface repair procedures
Proposed repair procedures for the top surface of the pedestal supporting the hydrostatic bearing runner for the 64m Antenna are presented. These procedures included: (1) removal of existing grout and concrete to approximately 8 in. below original concrete surface using a presplitting technique with expansive cement followed by secondary breaking; (2) preparation of exposed concrete surface including an epoxy bonding agent; and (3) replacement of material removed with 8 in. of new concrete surface including an epoxy bonding agent; and (4) replacement of material removed with 8 in. of new concrete and 4 in. of new grout
Using the Regular Chains Library to build cylindrical algebraic decompositions by projecting and lifting
Cylindrical algebraic decomposition (CAD) is an important tool, both for
quantifier elimination over the reals and a range of other applications.
Traditionally, a CAD is built through a process of projection and lifting to
move the problem within Euclidean spaces of changing dimension. Recently, an
alternative approach which first decomposes complex space using triangular
decomposition before refining to real space has been introduced and implemented
within the RegularChains Library of Maple. We here describe a freely available
package ProjectionCAD which utilises the routines within the RegularChains
Library to build CADs by projection and lifting. We detail how the projection
and lifting algorithms were modified to allow this, discuss the motivation and
survey the functionality of the package
Note on scattering in asymptotically nonlocal theories
It is possible to formulate theories with many Lee-Wick particles such that a
limit exists where the low-energy theory approaches the form of a ghost-free
nonlocal theory. Such asymptotically nonlocal quantum field theories have a
derived regulator scale that is hierarchically smaller than the lightest
Lee-Wick resonance; this has been studied previously in the case of
asymptotically nonlocal scalar theories, Abelian and non-Abelian gauge
theories, and linearized gravity. Here we consider the dependence on
center-of-mass energy of scattering cross sections in these theories. While
Lee-Wick resonances can be decoupled from the low-energy theory, scattering
amplitudes nonetheless reflect the emergent nonlocality at the scale where the
quadratic divergences are regulated. This implies observable consequences in
theories designed to address the hierarchy problem, even when the Lee-Wick
resonances are not directly accessible.Comment: 16 pages LaTeX, 4 figure
Even faster sorting of (not only) integers
In this paper we introduce RADULS2, the fastest parallel sorter based on
radix algorithm. It is optimized to process huge amounts of data making use of
modern multicore CPUs. The main novelties include: extremely optimized
algorithm for handling tiny arrays (up to about a hundred of records) that
could appear even billions times as subproblems to handle and improved
processing of larger subarrays with better use of non-temporal memory stores
A FINANCIAL TRAINING PROGRAM FOR USDA/FSA BORROWERS: EVOLUTION AND IMPACTS
A financial training program designed by Cooperative Extension specialists was provided to over 2,000 USDA/FSA borrowers from the Northeast during the period 1994-1999. Key to the success of the workshops was an in-depth, user friendly curriculum that evolved over time, eventually replacing satellite-feed instruction with pre-taped videos. Cluster analysis classified nearly 70% of workshop participants as "Low Finance Priority" or "Low Finance Knowledge." Farmers in these clusters received a relatively greater educational benefit from the program than those not in these clusters. Impact analysis indicated that perceived annual gain in farm net worth from application of workshop tools ranged from approximately 10,000. The training addressed the needs of producers typically isolated from Cooperative Extension because the workshop was the only extension program attended that year by nearly two-thirds of them.Agricultural Finance,
QuickXsort: Efficient Sorting with n log n - 1.399n +o(n) Comparisons on Average
In this paper we generalize the idea of QuickHeapsort leading to the notion
of QuickXsort. Given some external sorting algorithm X, QuickXsort yields an
internal sorting algorithm if X satisfies certain natural conditions.
With QuickWeakHeapsort and QuickMergesort we present two examples for the
QuickXsort-construction. Both are efficient algorithms that incur approximately
n log n - 1.26n +o(n) comparisons on the average. A worst case of n log n +
O(n) comparisons can be achieved without significantly affecting the average
case.
Furthermore, we describe an implementation of MergeInsertion for small n.
Taking MergeInsertion as a base case for QuickMergesort, we establish a
worst-case efficient sorting algorithm calling for n log n - 1.3999n + o(n)
comparisons on average. QuickMergesort with constant size base cases shows the
best performance on practical inputs: when sorting integers it is slower by
only 15% to STL-Introsort
Tuberculosis Disparity between US-born Blacks and Whites, Houston, Texas, USA1
An unusually high proportion of cases in Houston are caused by active transmission of endemic strains among US-born non-Hispanic blacks
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