3,938 research outputs found
Effect of Lysine in Starter Diets on Performance and Carcass Characteristics of Swine
Current research indicates that the lysine level suggested by the National Research Council for starter pigs (10 to 20 kg) may be inadequate. Lysine, the first limiting amino acid in most swine rations, is mainly provided by soybean meal in cereal-based diets. With the increasing price of soybean meal, it is important to determine the correct lysine requirement in order to minimize the amount of soybean meal needed in the ration. In low protein diets, lysine has been shown to increase rate of gain and decrease feed/gain in swine.· It also effects carcass characteristics by increasing loin-eye area and total amount of lean, while decreasing fat percentage. The purpose of this experiment was to determine the effects of varying levels of lysine in starter diets on performance of swine from weaning to slaughter and on the resulting carcass characteristics
Amino Acid Deficiencies in a Lysine Supplemented Low-protein Sunflower Meal Diet for Young Pigs
There has been a dramatic increase in sunflower production during the past few years. Sunflower seeds are used primarily for the production of sunflower oil, thus, the by-product of this pr-0cess is sunflower meal which is available for livestock use. Processes that remove much of the hull, result in a meal that has a protein content similar to that of soybean meal. However, the lysine level of sunflower meal is only approximately 58% of the level in soybean meal. Since synthetic lysine is now readily available it is possible that lysine supplemented sunflower meal could be an alternative for soybean meal in swine diets. This study was conducted to determine other limiting amino acids in a lysine supplemented, 12% protein, corn-sunflower meal diet for young pigs
Limiting Amino Acids in Sunflower Meal for Growing Swine
Increased production of sunflower seeds, particularly in South Dakota, North Dakota and Minnesota, has increased the availability of sunflower meal as a protein supplement source for livestock diets. Previous research has shown that sunflower meal is not a good source of the amino acid lysine, the first limiting amino acid in sunflower meal. If lysine is available at a competitive cost, economical diets can be. formulated using synthetic lysine and sunflower meal that are equal in lysine content to diets using soybean meal as the protein source. This study was conducted to identify other limiting amino acids in a lysine fortified low protein, corn-sunflower meal diet for the growing pig
Thermodynamic phase transitions for Pomeau-Manneville maps
We study phase transitions in the thermodynamic description of
Pomeau-Manneville intermittent maps from the point of view of infinite ergodic
theory, which deals with diverging measure dynamical systems. For such systems,
we use a distributional limit theorem to provide both a powerful tool for
calculating thermodynamic potentials as also an understanding of the dynamic
characteristics at each instability phase. In particular, topological pressure
and Renyi entropy are calculated exactly for such systems. Finally, we show the
connection of the distributional limit theorem with non-Gaussian fluctuations
of the algorithmic complexity proposed by Gaspard and Wang [Proc. Natl. Acad.
Sci. USA 85, 4591 (1988)].Comment: 5 page
Quasiparticle Description of Hot QCD at Finite Quark Chemical Potential
We study the extension of a phenomenologically successful quasiparticle model
that describes lattice results of the equation of state of the deconfined phase
of QCD for Tc <= T < 4 Tc, to finite quark chemical potential mu. The phase
boundary line Tc(mu), the pressure difference (p(T,mu)-p(T,mu=0))/T^4 and the
quark number density nq(T,mu)/T^3 are calculated and compared to recent lattice
results. Good agreement is found up to quark chemical potentials of order mu =
Tc.Comment: 12 pages, 7 figures; added reference
Separation of trajectories and its Relation to Entropy for Intermittent Systems with a Zero Lyapunov exponent
One dimensional intermittent maps with stretched exponential separation of
nearby trajectories are considered. When time goes infinity the standard
Lyapunov exponent is zero. We investigate the distribution of
,
where is determined by the nonlinearity of the map in the vicinity of
marginally unstable fixed points. The mean of is determined
by the infinite invariant density. Using semi analytical arguments we calculate
the infinite invariant density for the Pomeau-Manneville map, and with it
obtain excellent agreement between numerical simulation and theory. We show
that \alpha \left is equal to Krengel's entropy and
to the complexity calculated by the Lempel-Ziv compression algorithm. This
generalized Pesin's identity shows that \left and
Krengel's entropy are the natural generalizations of usual Lyapunov exponent
and entropy for these systems.Comment: 12 pages, 10 figure
Effect of Weaning Age on Pig Performance to Eight Weeks
The economic return that is realized by a commercial swine operation is largely determined by the efficiency of the sow herd. Increasing litter size and shortening the interval between litters results in greater yearly production per sow unit. Weaning at 2 weeks and allowing 10 days for rebreeding, theoretically, allows the production of 2.65 litters per sow per year~ compared to the national average of 1.7 litters. This study was conducted to determine the effect of weaning age on post weaning performance
Operator renewal theory and mixing rates for dynamical systems with infinite measure
We develop a theory of operator renewal sequences in the context of infinite
ergodic theory. For large classes of dynamical systems preserving an infinite
measure, we determine the asymptotic behaviour of iterates of the
transfer operator. This was previously an intractable problem.
Examples of systems covered by our results include (i) parabolic rational
maps of the complex plane and (ii) (not necessarily Markovian) nonuniformly
expanding interval maps with indifferent fixed points.
In addition, we give a particularly simple proof of pointwise dual ergodicity
(asymptotic behaviour of ) for the class of systems under
consideration.
In certain situations, including Pomeau-Manneville intermittency maps, we
obtain higher order expansions for and rates of mixing. Also, we obtain
error estimates in the associated Dynkin-Lamperti arcsine laws.Comment: Preprint, August 2010. Revised August 2011. After publication, a
minor error was pointed out by Kautzsch et al, arXiv:1404.5857. The updated
version includes minor corrections in Sections 10 and 11, and corresponding
modifications of certain statements in Section 1. All main results are
unaffected. In particular, Sections 2-9 are unchanged from the published
versio
Character of the structural and magnetic phase transitions in the parent and electron doped BaFe2As2 compounds
We present a combined high-resolution x-ray diffraction and x-ray resonant
magnetic scattering (XRMS) study of as-grown BaFe2As2. The structural/magnetic
transitions must be described as a two-step process. At T_S = 134.5 K we
observe the onset of a second-order structural transition from the
high-temperature paramagnetic tetragonal structure to a paramagnetic
orthorhombic phase, followed by a discontinuous step in the structural order
parameter that is coincident with a first-order antiferromagnetic (AFM)
transition at T_N = 133.75 K. These data, together with detailed
high-resolution x-ray studies of the structural transition in lightly doped
Ba(Fe{1-x}Co{x})2As2 and Ba(Fe{1-x}Rh{x})2As2 compounds, show that the
structural and AFM transitions do, in fact, occur at slightly different
temperatures in the parent BaFe2As2 compound, and evolve towards split
secondorder transitions as the doping concentration is increased. We estimate
the composition for the tricritical point for Co-doping and employ a mean-field
approach to show that our measurements can be explained by the inclusion of an
anharmonic term in the elastic free energy and magneto-elastic coupling in the
form of an emergent Ising-nematic degree of freedom.Comment: 10 pages, 11 figures; accepted for publication in Phys. Rev.
Nudges and other moral technologies in the context of power: Assigning and accepting responsibility
Strawson argues that we should understand moral responsibility in terms of our practices of holding responsible and taking responsibility. The former covers what is commonly referred to as backward-looking responsibility , while the latter covers what is commonly referred to as forward-looking responsibility . We consider new technologies and interventions that facilitate assignment of responsibility. Assigning responsibility is best understood as the second- or third-personal analogue of taking responsibility. It establishes forward-looking responsibility. But unlike taking responsibility, it establishes forward-looking responsibility in someone else. When such assignments are accepted, they function in such a way that those to whom responsibility has been assigned face the same obligations and are susceptible to the same reactive attitudes as someone who takes responsibility. One family of interventions interests us in particular: nudges. We contend that many instances of nudging tacitly assign responsibility to nudgees for actions, values, and relationships that they might not otherwise have taken responsibility for. To the extent that nudgees tacitly accept such assignments, they become responsible for upholding norms that would otherwise have fallen under the purview of other actors. While this may be empowering in some cases, it can also function in such a way that it burdens people with more responsibility that they can (reasonably be expected to) manage
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