57 research outputs found
Comparison of spermiogenesis in the externally fertilizing Hemigrammus erythrozonus and the inseminating Corynopoma riisei (Teleostei: Characiformes: Characidae)
Enhanced mucosal re-epithelialization induced by short chain fatty acids in experimental colitis
Highly-parallelized simulation of a pixelated LArTPC on a GPU
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current induced on 10^3 pixels takes around 1 ms on the GPU, compared with approximately 10 s on the CPU. The results of the simulation are compared against data from a pixel-readout LArTPC prototype
The effect of acute maternal hypoglycaemia on fetal cardiovascular control
Aims: To investigate the effect of acute maternal hypoglycaemia
on fetal cardiovascular (CV) function, as a sub-optimal environment
in utero has been implicated in the development of CV disease in
adult life.Subjects: Fetal sheep (n = 7) were studied in utero at 125 and 126
days gestational age (dGA, term = 147 days) following implantation
of vascular catheters and an umbilical cord occluder at 119 dGA.Study design: Fetal CV parameters were measured during a
maternal saline (day 125) and insulin (day 125) infusion. Fetal
CV function was assessed by: (a) generating a dose response
curve to angiotensin II; (b) a 90 sec total umbilical cord occlusion;
(c) administration of phenylephrine to assess baroreflex function.Outcome measures: (a) Area under the mean arterial blood
pressure (MAP) response (AUC) to increasing doses of angiotensin II;
(b) MAP and heart rate (HR) response to cord occlusion;
(c) sensitivity and operating point of the baroreflex response.
Results: Maternal insulin infusion resulted in maternal and fetal
hypoglycaemia. (a) The angiotensin II MAP AUC was not affected
by hypoglycaemia. (b) The increase in MAP and decrease in
HR following a 90 sec cord occlusion was not affected by
hypoglycaemia. (c) Hypoglycaemia resulted in reduced fetal
baroreflex sensitivity (P <0.05, paired t test).Conclusions: Our finding of reduced fetal baroreflex sensitivity
during fetal hypoglycaemia indicates altered CV homeostatic
mechanisms. Such fetal adaptations to a poor intrauterine
environment could contribute towards the development of altered
cardiovascular phenotype in adult life
Non-invasive measures of heart rate variability following intermittent umbilical cord occlusion in the preterm ovine fetus
Changes in Soil Chemical and Physical Properties of Andisols under Oil Palm Small holder in the West Pasaman District of West Sumatra
Efficacy of Semduramicin and Salinomycin Against Eimeria maxima in a Laboratory Test Using Two Levels of Oocyst Inocuia
Estimation dâabondance des criquets (Orthoptera: Acrididae) dans les Ă©cosystĂšmes prairiaux
Effect of extended scope physiotherapists assessments in orthopaedic diagnostic setting: a systematic review
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