9,025 research outputs found
Space adaptation syndrome experiments (8-IML-1)
A set of seven experiments will study adaptation of the human nervous system to weightlessness. Particular emphasis will be placed on the vestibular and proprioceptive systems. The experiments are as follows: the sled/H-reflex; rotation/vestibulo-ocular reflex; the visual stimulator experiment; proprioception (relaxed) experiment; proprioception (active) experiment; proprioception (illusion) experiment; and tactile acuity
Life science experiments during parabolic flight: The McGill experience
Over the past twelve years, members of the Aerospace Medical Research Unit of McGill University have carried out a wide variety of tests and experiments in the weightless condition created by parabolic flight. This paper discusses the pros and cons of that environment for the life scientist, and uses examples from the McGill program of the types of activities which can be carried out in a transport aircraft such as the NASA KC-135
Unintegrated parton distributions and electroweak boson production at hadron colliders
We describe the use of doubly-unintegrated parton distributions in
hadron-hadron collisions, using the (z,k_t)-factorisation prescription where
the transverse momentum of the incoming parton is generated in the last
evolution step. We apply this formalism to calculate the transverse momentum
(P_T) distributions of produced W and Z bosons and compare the predictions to
Tevatron Run 1 data. We find that the observed P_T distributions can be
generated almost entirely by the leading order q_1 q_2 -> W,Z subprocesses,
using known and universal doubly-unintegrated quark distributions. We also
calculate the P_T distribution of the Standard Model Higgs boson at the LHC,
where the dominant production mechanism is by gluon-gluon fusion.Comment: 20 pages, 8 figures. Version to appear in Phys. Rev. D; correction to
Higgs P_T distribution made in Erratu
Comparing the Profitability of Beef Production Enterprises in North Dakota
Agricultural Finance, Production Economics,
The effect of boar breed type on reproduction, production performance and carcass and meat quality in pigs
peer-reviewedA total of 720 sows were inseminated with semen from eight commercially available boar breed types (Landrace, Large White, Duroc, Landrace Large White, Landrace Duroc, Landrace Large White Duroc, Large White Duroc and Landrace Large White Pietrain). There were no effects of purebred versus crossbred boar breed type on reproductive performance or on production performance of progeny. The only carcass evaluation parameter affected was V measurement (backfat thickness at the edge of the eye muscle) which was 2 mm thicker (P < 0.05) for the progeny of crossbred boars. Meat from pigs of purebred boars breed had a higher proportion of intramuscular fat than that from crossbred boars breed (26.5 v 21.1 g/kg, respectively, P < 0.05). There were inconsistent effects of individual boar breed type on performance, carcass quality and meat qua lity. Producers should consider the variation between the progeny of individual boars to achieve improved production performance. There was also a lack of relationship between backfat at the P2 position and eye muscle area or depth (r −0.03 and −0.01, respectively) which suggests that carcass characteristics other than P2 backfat need to be included in the selection of breeding animals. Similarly, the weak correlations between carcass and meat quality traits (r < 0.3) indicate that if meat quality is to be improved, it must be specifically included in the selection criteria.The authors gratefully acknowledge joint funding for this research from the Pig Production Development Committee in conjunction with the Ulster Farmers’ Union Pigs Committee and the Department of Agriculture and Rural Development for Northern Ireland
Understanding the Recovery Process in Psychosis
Conceptualizing recovery in the context of severe and persisting mental health conditions is a complex issue. In recent years, there has been a call to re-focus research from understanding the concept of recovery to improving understanding of the process of recovery. There is a paucity of knowledge about the core processes involved in recovery from psychosis.
Objective: The authors aimed to gain insight into possible processes involved in recovery through analyzing data generated from a large qualitative study investigating employment barriers and support needs of people living with psychosis.
Research Design and Methods: Participants were 137 individuals drawn from six key stakeholder groups. Data obtained from focus groups (14) and individual interviews (34) were analyzed using thematic analysis.
Results: The main recovery processes identified were: learning effective coping strategies; recognizing personal potential; identifying and realizing personal goals; participation in social and occupational roles; positive risk-taking; and reclaiming personal identity.
Discussion: The results of this study have implications for treatment as well as the daily support needs of people recovering from psychosis
Diffractive parton distributions: the role of the perturbative Pomeron
We consider the role of the perturbative Pomeron-to-parton splitting in the
formation of the diffractive parton distributions.Comment: 8 pages, 4 figures. To appear in the proceedings of the 12th
International Conference on Elastic and Diffractive Scattering: Forward
Physics and QCD, DESY, Hamburg, Germany, 21-25 May 200
Effect of absorptive corrections on inclusive parton distributions
We study the effect of absorptive corrections due to parton recombination on
the parton distributions of the proton. A more precise version of the GLRMQ
equations, which account for non-linear corrections to DGLAP evolution, is
derived. An analysis of HERA F_2 data shows that the small-x gluon distribution
is enhanced at low scales when the absorptive effects are included, such that a
negative gluon distribution at 1 GeV is no longer required.Comment: 10 pages, 3 figure
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