1,869 research outputs found
Comparative value of dry-rolled corn, distiller’s dried grains, and wheat middlings for receiving diets
Two 28-day receiving experiments were
conducted using 620 exotic × British cross
steers to evaluate differences in growth performance,
morbidity, and mortality when fed diets
containing dry-rolled corn, distiller’s dried grains
with solubles, or wheat middlings. All diets
contained approximately 60% concentrate and
40% roughage (alfalfa hay). Gain and efficiency
tended to be poorer for cattle fed the wheat
middling-based diet than for those fed corn. No
notable differences were evident in terms of the
percentage of cattle treated for respiratory
disease. Feed intake and daily gain were improved
slightly when corn was replaced by
distiller’s dried grains, but efficiency was not
changed. However, the incidence of respiratory
disease also was higher for cattle fed the distiller’s
grains diet in comparison to corn
Universal property of the information entropy in fermionic and bosonic systems
It is shown that a similar functional form holds approximately
for the information entropy S as function of the number of particles N for
atoms, nuclei and atomic clusters (fermionic systems) and correlated
boson-atoms in a trap (bosonic systems). It is also seen that rigorous
inequalities previously found to hold between S and the kinetic energy T for
fermionic systems, hold for bosonic systems as well. It is found that
Landsberg's order parameter is an increasing function of N for the
above systems. It is conjectured that the above properties are universal i.e.
they do not depend on the kind of constituent particles (fermions or correlated
bosons) and the size of the system.Comment: 6 pages, 2 EPS figures, LaTe
Applying Psychological Theory to in-game moral behaviors through the development of a purpose-made game
A number of video games involve moral narratives or require the players to make
moral decisions. Research from psychologists has helped to understand the effects that video
game content can have on how individuals think, feel and behave. Recent research has
examined the role of morality in video games, yet there are many inconsistencies in the
findings that could be due to the use of commercial video games for research purposes, which
contain biases such as familiarity with the game and favorite characters. By developing a
bespoke game designed specifically for the purpose of exploring morality, these potential
biases can be reduced. Before designing the game, morality in existing video games is
critically analyzed, using theories from moral psychology. From this, a game was developed
to measure behavioral outcomes through which moral decisions are made; with the aim to
address biases that are inherent in commercial games. Then, the resultant game was used to
investigate how participants make moral choices in video games
Systematic Review of Household Water Conservation Interventions Using the Information–Motivation–Behavioral Skills Model
Increasing droughts and water shortages are intensifying the need for residential water conservation. We identify and classify 24 water conservation studies using the information–motivation–behavioral skills (IMB) model by categorizing interventions based on content and water conservation effectiveness. This synthesis revealed several insights. First, all of the interventions used information, motivation, and/or behavioral skills, suggesting that water conservation interventions can be interpreted within the IMB framework. Second, interventions with two or more IMB components led to reductions in water usage, but the average effect sizes between different types of interventions were similar and there was a considerable range around these averages. To the extent that intervention effectiveness is driven by populations lacking specific IMB components, more elicitation research to identify gaps in specific populations could support greater effectiveness. Designing interventions explicitly with the IMB model would facilitate comparability across studies and could support a better understanding of water conservation interventions
Study of Neutron-Induced Ionization in Helium and Argon Chamber Gases
Ion chambers used to monitor the secondary hadron and tertiary muon beam in
the NuMI neutrino beamline will be exposed to background particles, including
low energy neutrons produced in the beam dump. To understand these backgrounds,
we have studied Helium- and Argon-filled ionization chambers exposed to intense
neutron fluxes from PuBe neutron sources ( MeV). The sources emit
about 10 neutrons per second. The number of ion pairs in the chamber gas
volume per incident neutron is derived. While limited in precision because of a
large gamma ray background from the PuBe sources, our results are consistent
with the expectation that the neutrons interact purely elastically in the
chamber gas.Comment: accepted for publication in NIM
Auxiliary particle theory of threshold singularities in photoemission and X-ray absorption spectra: Test of a conserving T-matrix approximation
We calculate the exponents of the threshold singularities in the
photoemission spectrum of a deep core hole and its X-ray absorption spectrum in
the framework of a systematic many-body theory of slave bosons and
pseudofermions (for the empty and occupied core level). In this representation,
photoemission and X-ray absorption can be understood on the same footing; no
distinction between orthogonality catastrophe and excitonic effects is
necessary. We apply the conserving slave particle T-matrix approximation
(CTMA), recently developed to describe both Fermi and non-Fermi liquid behavior
systems with strong local correlations, to the X-ray problem as a test case.
The numerical results for both photoemission and X-ray absorption are found to
be in agreement with the exact infrared powerlaw behavior in the weak as well
as in the strong coupling regions. We point out a close relation of the CTMA
with the parquet equation approach of Nozi{\`e}res et al.Comment: 10 pages, 9 figures, published versio
Seasonal and diurnal variations in AMPERE observations of the Birkeland currents compared to modeled results
We reduce measurements made by the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) to give the total Birkeland (field-aligned) current flowing in both hemispheres in monthly and hourly bins. We analyze these totals using 6 years of data (2010–2015) to examine solar zenith angle-driven variations in the total Birkeland current flowing in both hemispheres, simultaneously, for the first time. A diurnal variation is identified in the total Birkeland current flowing, consistent with variations in the solar zenith angle. A seasonal variation is also identified, with more current flowing in the Northern (Southern) Hemisphere during Bartels rotations in northern (southern) summer. For months close to equinox, more current is found to flow in the Northern Hemisphere, contrary to our expectations. We also conduct the first test of the Milan (2013) model for estimating Birkeland current magnitudes, with modifications made to account for solar contributions to ionospheric conductance based on the observed variation of the Birkeland currents with season and time of day. The modified model, using the value of ?D averaged by Bartels rotation (scaled by 1.7), is found to agree with the observed AMPERE currents, with a correlation of 0.87 in the Northern Hemisphere and 0.86 in the Southern Hemisphere. The improvement over the correlation with dayside reconnection rate is demonstrated to be a significant improvement to the model. The correlation of the residuals is found to be consistent with more current flowing in the Northern Hemisphere. This new observation of systematically larger current flowing in the Northern Hemisphere is discussed in the context of previous results which suggest that the Northern Hemisphere may react more strongly to dayside reconnection than the Southern Hemisphere
quantum Heisenberg antiferromagnet on the triangular lattice: a group symmetry analysis of order by disorder
On the triangular lattice, for between and , the classical
Heisenberg model with first and second neighbor interactions presents
four-sublattice ordered ground-states. Spin-wave calculations of Chubukov and
Jolicoeur\cite{cj92} and Korshunov\cite{k93} suggest that quantum fluctuations
select amongst these states a colinear two-sublattice order. From theoretical
requirements, we develop the full symmetry analysis of the low lying levels of
the spin-1/2 Hamiltonian in the hypotheses of either a four or a two-sublattice
order. We show on the exact spectra of periodic samples ( and )
how quantum fluctuations select the colinear order from the four-sublattice
order.Comment: 15 pages, 4 figures (available upon request), Revte
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