53 research outputs found
Sorghum grain, urea or soybean meal as a protein source in all-concentrate cattle finishing rations
Results of previous similar research have been reported in Kansas Agicu1tural Experiment Station Bulletins 483, 493, 507, and 518. Trials at several research centers and here have shown that roughage may be satisfactorily omitted from finishing rations for cattle often, reducing feed required per pound of gain. Cattle nay be finished on all-grain diets with only mineral and vitamin supplements when the grain has sufficient protein
A weakly stable algorithm for general Toeplitz systems
We show that a fast algorithm for the QR factorization of a Toeplitz or
Hankel matrix A is weakly stable in the sense that R^T.R is close to A^T.A.
Thus, when the algorithm is used to solve the semi-normal equations R^T.Rx =
A^Tb, we obtain a weakly stable method for the solution of a nonsingular
Toeplitz or Hankel linear system Ax = b. The algorithm also applies to the
solution of the full-rank Toeplitz or Hankel least squares problem.Comment: 17 pages. An old Technical Report with postscript added. For further
details, see http://wwwmaths.anu.edu.au/~brent/pub/pub143.htm
Fitting the integrated Spectral Energy Distributions of Galaxies
Fitting the spectral energy distributions (SEDs) of galaxies is an almost
universally used technique that has matured significantly in the last decade.
Model predictions and fitting procedures have improved significantly over this
time, attempting to keep up with the vastly increased volume and quality of
available data. We review here the field of SED fitting, describing the
modelling of ultraviolet to infrared galaxy SEDs, the creation of
multiwavelength data sets, and the methods used to fit model SEDs to observed
galaxy data sets. We touch upon the achievements and challenges in the major
ingredients of SED fitting, with a special emphasis on describing the interplay
between the quality of the available data, the quality of the available models,
and the best fitting technique to use in order to obtain a realistic
measurement as well as realistic uncertainties. We conclude that SED fitting
can be used effectively to derive a range of physical properties of galaxies,
such as redshift, stellar masses, star formation rates, dust masses, and
metallicities, with care taken not to over-interpret the available data. Yet
there still exist many issues such as estimating the age of the oldest stars in
a galaxy, finer details ofdust properties and dust-star geometry, and the
influences of poorly understood, luminous stellar types and phases. The
challenge for the coming years will be to improve both the models and the
observational data sets to resolve these uncertainties. The present review will
be made available on an interactive, moderated web page (sedfitting.org), where
the community can access and change the text. The intention is to expand the
text and keep it up to date over the coming years.Comment: 54 pages, 26 figures, Accepted for publication in Astrophysics &
Space Scienc
Biological activity and receptor binding properties of some C-terminally modified analogues of FMRFamide.
Sorghum grain, urea or soybean meal as a protein source in all-concentrate cattle finishing rations
Results of previous similar research have been
reported in Kansas Agicu1tural Experiment Station Bulletins 483, 493, 507, and 518.
Trials at several research centers and here have
shown that roughage may be satisfactorily omitted from
finishing rations for cattle often, reducing feed required
per pound of gain. Cattle nay be finished on
all-grain diets with only mineral and vitamin supplements
when the grain has sufficient protein
Headspace and small-chamber studies of airborne diacetyl release from selected food flavoring mixtures: activity coefficients and air modeling implications
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