300 research outputs found
Moisture processes accompanying convective activity
A moisture budget analysis was performed on data collected during the AVE 7 (May 2 to 3, 1978) and AVE-SESAME1 (April 10 to 11, 1979) experiments. Local rates-of-change of moisture were compared with average moisture divergence in the same time period. Results were presented as contoured plots in the horizontal and as vertical cross sections. These results were used to develop models of the distribution of moisture processes in the vicinity of convective areas in two layers representing lower and middle tropospheric conditions. Good correspondence was found between the residual term of the moisture budget and actual precipitation
Electronic structure and time-dependent description of rotational predissociation of LiH
Adiabatic potential energy curves of the and states of
the LiH molecule have been calculated. They correlate asymptotically to atomic
states, like 2s+1s, 2p+1s, 3s+1s, 3p+1s, 3d+1s, 4s+1s, 4p+1s and 4d+1s. Very
good agreement is found between our calculated spectroscopic parameters and
experimental ones. The dynamics of the rotational predissociation process of
the state has been studied by solving the time-dependent
Schr\"{o}dinger equation. The classical experiment of Velasco [Can. J. Phys.
{35}, 1204 (1957)] on dissociation in the state is explained in
detail
Electronic structure and rovibrational predissociation of the 2sPi state in KLi
Adiabatic potential energy curves of the 3sSigma+, 3tSigma+, 2sPi and 2tPi
states correlating for large internuclear distance with the K(4s) + Li(2p)
atomic asymptote were calculated. Very good agreement between the calculated
and the experimental curve of the 2sPi state allowed for a reliable description
of the dissociation process through a small (20 cm-1 for J = 0) potential
energy barrier. The barrier supports several rovibrational quasi-bound states
and explicit time evolution of these states via the time-dependent nuclear
Schroedinger equation, showed that the state populations decay exponentially in
time. We were able to precisely describe the time-dependent dissociation
process of several rovibrational levels and found that our calculated spectrum
match very well with the assigned experimental spectrum. Moreover, our approach
is able to predict the positions of previously unassigned lines despite their
low intensit
Changes in handgrip force and blood lactate as response to simulated climbing competition
The aim of the study was to estimate post-competition changes in handgrip strength and blood lactate in climbers and relationships of the studied variables with declared climbing ability of the tested athletes. Twenty one male climbers volunteered to take part in the experiment. Each subject took part in simulated lead climbing competition on the artificial wall – (difficulty 7a in French scale). The blood lactate concentration was measured pre-climbing and then 3 min and 30 min post-climbing. Grip force of both hands (dominant and non-dominant) was measured twice – pre-climbing and 1 min post-climbing (semi-final). Maximum heart rate during climbing reached 181.4±7.7 beats per minute. Lactate concentration amounted to 6.35±1.50 mmol/l and 2.28±0.66 mmol/l 3 min and 30 min post-climbing, respectively. Handgrip force related to body mass (averaged for both hands) decreased significantly from 7.39±1.30 N/kg pre-climbing to 6.57±1.05 N/kg 1 min post-climbing. Self reported climbing ability was correlated with lactate concentration and handgrip force, as well. It was demonstrated that athletes reporting higher climbing ability showed better lactate recovery
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Preface
Preface - The second International Conference on Mathematical Modeling in Physical Sciences (IC-MSQUARE) took place at Prague, Czech Republic, from Sunday 1 September to Thursday 5 September 2013
The GEOS-5 Data Assimilation System-Documentation of Versions 5.0.1, 5.1.0, and 5.2.0
This report documents the GEOS-5 global atmospheric model and data assimilation system (DAS), including the versions 5.0.1, 5.1.0, and 5.2.0, which have been implemented in products distributed for use by various NASA instrument team algorithms and ultimately for the Modem Era Retrospective analysis for Research and Applications (MERRA). The DAS is the integration of the GEOS-5 atmospheric model with the Gridpoint Statistical Interpolation (GSI) Analysis, a joint analysis system developed by the NOAA/National Centers for Environmental Prediction and the NASA/Global Modeling and Assimilation Office. The primary performance drivers for the GEOS DAS are temperature and moisture fields suitable for the EOS instrument teams, wind fields for the transport studies of the stratospheric and tropospheric chemistry communities, and climate-quality analyses to support studies of the hydrological cycle through MERRA. The GEOS-5 atmospheric model has been approved for open source release and is available from: http://opensource.gsfc.nasa.gov/projects/GEOS-5/GEOS-5.php
Nonequilibrium phase transition due to social group isolation
We introduce a simple model of a growing system with competing
communities. The model corresponds to the phenomenon of defeats suffered by
social groups living in isolation. A nonequilibrium phase transition is
observed when at critical time the first isolated cluster occurs. In the
one-dimensional system the volume of the new phase, i.e. the number of the
isolated individuals, increases with time as . For a large number
of possible communities the critical density of filled space equals to where is the system size. A similar transition is observed
for Erd\H{o}s-R\'{e}nyi random graphs and Barab\'{a}si-Albert scale-free
networks. Analytic results are in agreement with numerical simulations.Comment: 5 pages, 4 figure
The Use of the RGB Products at the HPC, OPC, NHC, and SAB Proving Grounds During the 2011 Atlantic Hurricane Season
No abstract availabl
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