3,077 research outputs found
Prescription Drug Abuse
Prescription drugs can be abused in multiple ways: using a medication that is not prescribed to you; taking a drug in a higher dosage or different form than originally prescribed, or; taking a drug for a different reason than prescribed.https://digitalcommons.cedarville.edu/public_health_posters/1010/thumbnail.jp
On Es-spread effects in the ionosphere connected to earthquakes
International audienceIn the present work, phenomena in the ionosphere are studied, which are connected with earthquakes (16 events) having a depth of less than 50 km and a magnitude M larger than 4. Analysed are night-time Es-spread effects using data of the vertical sounding station Petropavlovsk-Kamchatsky (f=53.0°, ?=158.7°) from May 2004 until August 2004 registered every 15 min. It is found that the maximum distance of the earthquake from the sounding station, where pre-seismic phenomena are yet observable, depends on the magnitude of the earthquake. Further it is shown that 1–2 days before the earthquakes, in the pre-midnight hours, the appearance of Es-spread increases. With a probability of more than 0.95, this increase of Es-spread observations before midnight is not casual
Behaviour of Grazing Goats on Tanzania Grassland under Different Residue Leaf Area Index in Southeastern Brazil
Defoliation intensity is important for grassland management. While the residue is the result of defoliation, maintaining a remaining leaf area is essential, as leaf area index (LAI) determines forage yield, by increasing percentage of light interception and incident light capture. The understanding of animal behavior is also essential for adopting strategic measures to manage grasslands since the behavioral factor is the link between plant and animal performance. The objective of this study was to evaluate changes of the behavioral characteristics of goats grazing on Tanzania grassland (Panicum maximum cv. Tanzania) under rotational stocking with different residue leaf area index (RLAI)
Minimum Decision Cost for Quantum Ensembles
For a given ensemble of independent and identically prepared particles,
we calculate the binary decision costs of different strategies for measurement
of polarised spin 1/2 particles. The result proves that, for any given values
of the prior probabilities and any number of constituent particles, the cost
for a combined measurement is always less than or equal to that for any
combination of separate measurements upon sub-ensembles. The Bayes cost, which
is that associated with the optimal strategy (i.e., a combined measurement) is
obtained in a simple closed form.Comment: 11 pages, uses RevTe
Bacterial communities potentially involved in iron-cycling in Baltic Sea and North Sea sediments revealed by pyrosequencing
BRST quantization of the massless minimally coupled scalar field in de Sitter space (zero modes, euclideanization and quantization)
We consider the massless scalar field on the four-dimensional sphere .
Its classical action is degenerate
under the global invariance . We then quantize
the massless scalar field as a gauge theory by constructing a BRST-invariant
quantum action. The corresponding gauge-breaking term is a non-local one of the
form where
is a gauge parameter and is the volume of . It allows us to
correctly treat the zero mode problem. The quantum theory is invariant under
SO(5), the symmetry group of , and the associated two-point functions have
no infrared divergence. The well-known infrared divergence which appears by
taking the massless limit of the massive scalar field propagator is therefore a
gauge artifact. By contrast, the massless scalar field theory on de Sitter
space - the lorentzian version of - is not invariant under the
symmetry group of that spacetime SO(1,4). Here, the infrared divergence is
real. Therefore, the massless scalar quantum field theories on and
cannot be linked by analytic continuation. In this case, because of zero modes,
the euclidean approach to quantum field theory does not work. Similar
considerations also apply to massive scalar field theories for exceptional
values of the mass parameter (corresponding to the discrete series of the de
Sitter group).Comment: This paper has been published under the title "Zero modes,
euclideanization and quantization" [Phys. Rev. D46, 2553 (1992)
Assessment of Methane Production by Goats under Intermittent Grazing
There are 875 million goats worldwide (FAO 2012) and the majority are in developing countries where they are typically raised on pasture. Ruminants release gross energy as methane, which is a greenhouse gas. Mthane mitigation strategies require prior knowledge about emission of methane by animals under different management systems. Intake, quality and type of feed are factors that influence methane emissions, therefore the objective of this study was to investigate how grazing intensity, measured by the residual leaf area index (RLAI), influences methane emission by goats under rotational grazing on Tanzania grass pasture
First Measurements of the Radial Electric Field with the Motional Stark Effect Diagnostic in ASDEX Upgrade
Cholecystokinin and Glucose-Induced Insulinaemia in Dogs With and Without Pancreatic Acinar Atrophy
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