355 research outputs found
Electroweak phase transition in the economical 3-3-1 model
We consider the EWPT in the economical 3-3-1 (E331) model. Our analysis shows
that the EWPT in the model is a sequence of two first-order phase transitions,
at the TeV scale and at the
GeV scale. The EWPT is triggered by the new
bosons and the exotic quarks; its strength is about if the mass ranges
of these new particles are . The
EWPT is strengthened by only the new bosons; its
strength is about if the mass parts of , and
are in the ranges . The
contributions of and to the strengths of both EWPTs may
make them sufficiently strong to provide large deviations from thermal
equilibrium and B violation necessary for baryogenesis.Comment: 17 pages, 9 figure
How do packing defects modify the cooperative motions in supercooled liquids ?
We use molecular dynamic simulations to investigate the relation between the
presence of packing defects in a glass-former and the spontaneous cooperative
motions called dynamic heterogeneity. For that purpose we use a simple diatomic
glass-former and add a small number of larger or smaller diatomic probes. The
diluted probes modify locally the packing, inducing structural defects in the
liquid, while we find that the number of defects is small enough not to disturb
the average structure. We find that a small packing modification around a few
molecules can deeply influence the dynamics of the whole liquid, when
supercooled. When we use small probe molecules, the dynamics accelerates and
the dynamic heterogeneity decreases. In contrast, for large probes the dynamics
slows down and the dynamic heterogeneity increases. The induced heterogeneities
and transport coefficient modification increase when the temperature decreases
and disappear around the onset temperature of the cage dynamics.Comment: 7 pages, 12 figure
Structural features of geostrophic circulation in open region of the South China Sea
On the basis of observation data of water temperature and salinity the mean seasonal geostrophic circulation in open region of the South China Sea (SCS) was computed by the dynamic method relative to the 800 decibar reference surface. The results of computation let go to following notices:
In both main monsoons (winter and summer) there are two main geostrophic eddies: the anticlockwise eddy in the northern and northwestern part, and the clockwise eddy in the southern part of the SCS with corresponding divergent and convergent zones. The main frontal zones go along the middle latitudes of the sea from the southern continental shelf of Vietnam to the area west of Luzon Island. The strength and stability of the current in winter are higher than in summer. The Kuroshio has an enough strong branch intruding into the SCS through Bashi Strait in winter creating in the sea the water structure similar to that of the Northwest Pacific subtropical and tropical regions. In summer the Kuroshio water can intrude directly only into the area southwest of Taiwan
Outage performance analysis of non-orthogonal multiple access systems with RF energy harvesting
Non-orthogonal multiple access (NOMA) has drawn enormous attention from the research community as a promising technology for future wireless communications with increasing demands of capacity and throughput. Especially, in the light of fifth-generation (5G) communication where multiple internet-of-things (IoT) devices are connected, the application of NOMA to indoor wireless networks has become more interesting to study. In view of this, we investigate the NOMA technique in energy harvesting (EH) half-duplex (HD) decode-and-forward (DF) power-splitting relaying (PSR) networks over indoor scenarios which are characterized by log-normal fading channels. The system performance of such networks is evaluated in terms of outage probability (OP) and total throughput for delay-limited transmission mode whose expressions are derived herein. In general, we can see in details how different system parameters affect such networks thanks to the results from Monte Carlo simulations. For illustrating the accuracy of our analytical results, we plot them along with the theoretical ones for comparison
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