9,290 research outputs found
Real-time Optimal Resource Allocation for Embedded UAV Communication Systems
We consider device-to-device (D2D) wireless information and power transfer
systems using an unmanned aerial vehicle (UAV) as a relay-assisted node. As the
energy capacity and flight time of UAVs is limited, a significant issue in
deploying UAV is to manage energy consumption in real-time application, which
is proportional to the UAV transmit power. To tackle this important issue, we
develop a real-time resource allocation algorithm for maximizing the energy
efficiency by jointly optimizing the energy-harvesting time and power control
for the considered (D2D) communication embedded with UAV. We demonstrate the
effectiveness of the proposed algorithms as running time for solving them can
be conducted in milliseconds.Comment: 11 pages, 5 figures, 1 table. This paper is accepted for publication
on IEEE Wireless Communications Letter
The Higgs Sector of the Minimal 3 3 1 Model Revisited
The mass spectrum and the eigenstates of the Higgs sector of the minimal 3 3
1 model are revisited in detail. There are discrepancies between our results
and previous results by another author.Comment: 20 pages, latex, two figures. One note and one reference are adde
Nuclear halo structure and pseudo-spin symmetry
Nuclear halo structure and restoration of relativistic symmetry are studied
within the framework of the relativistic Hartree-Fock-Bogoliubov (RHFB) theory.
Giant halos as well as ordinary ones are found in Cerium isotopes close to the
neutron drip line. Bridged by T=0 {channel}, the restoration of pseudo-spin
symmetry (PSS) plays an essential role in stabilizing the neutron halo
structures. The Fock terms, especially the -tensor couplings, not only
play significant role in the PSS restoration but also present substantial
contributions to the T=0 {channel}, from which is well demonstrated the
necessity of Fock terms.Comment: 5pages, 4figures, 1tabl
General one-loop formulas for decay
Radiative corrections to the are evaluated in the
one-loop approximation. The unitary gauge gauge is used. The analytic result is
expressed in terms of the Passarino-Veltman functions. The calculations are
applicable for the Standard Model as well for a wide class of its gauge
extensions. In particular, the decay width of a charged Higgs boson can be derived. The consistence of our formulas and
several specific earlier results is shown.Comment: 33 pages, 3 figures, a new section (V) and references were improved
in the published versio
Contraction and Robustness of Continuous Time Primal-Dual Dynamics
The Primal-Dual (PD) algorithm is widely used in convex optimization to
determine saddle points. While the stability of the PD algorithm can be easily
guaranteed, strict contraction is nontrivial to establish in most cases. This
work focuses on continuous, possibly non-autonomous PD dynamics arising in a
network context, in distributed optimization, or in systems with multiple
time-scales. We show that the PD algorithm is indeed strictly contracting in
specific metrics and analyze its robustness establishing stability and
performance guarantees for different approximate PD systems. We derive
estimates for the performance of multiple time-scale multi-layer optimization
systems, and illustrate our results on a primal-dual representation of the
Automatic Generation Control of power systems.Comment: 6 pages, 1 figures, published on LCSS and CDC 201
Fatty Acid Synthase Impacts the Pathobiology of Candida parapsilosis In Vitro and during Mammalian Infection
Cytosolic fungal fatty acid synthase is composed of two subunits α and β, which are encoded by Fas1 and Fas2 genes. In this study, the Fas2 genes of the human pathogen Candida parapsilosis were deleted using a modified SAT1 flipper technique. CpFas2 was essential in media lacking exogenous fatty acids and the growth of Fas2 disruptants (Fas2 KO) was regulated by the supplementation of different long chain fatty acids, such as myristic acid (14∶0), palmitic acid (16∶0), and Tween 80, in a dose-specific manner. Lipidomic analysis revealed that Fas2 KO cells were severely restricted in production of unsaturated fatty acids. The Fas2 KO strains were unable to form normal biofilms and were more efficiently killed by murine-like macrophages, J774.16, than the wild type, heterozygous and reconstituted strains. Furthermore, Fas2 KO yeast were significantly less virulent in a systemic murine infection model. The Fas2 KO cells were also hypersensitive to human serum, and inhibition of CpFas2 in WT C. parapsilosis by cerulenin significantly decreased fungal growth in human serum. This study demonstrates that CpFas2 is essential for C. parapsilosis growth in the absence of exogenous fatty acids, is involved in unsaturated fatty acid production, influences fungal virulence, and represents a promising antifungal drug target
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