In this paper we study a two-consumers-one-resource competing system with Beddington-DeAngelis functional response. The two consumers competing for a renewable resource have intraspecific competition among their own populations. Firstly we investigate the extinction and uniform persistence of the predators, local and global stability of the equilibria, and existence of Hopf bifurcation at the p...

Copyright q 2010 Hui-Sheng Ding et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. A new and general existence and uniqueness theorem of almost automorphic solutions is obtained for the semilinear fractional differential equat...

We provide a band structure with low-energy properties consistent with recent photoemission and quantum oscillation measurements on FeSe, assuming mean-field-like site- and/or bond-centered ferro-orbital ordering at the structural transition. We show how the resulting model provides a consistent explanation of the temperature dependence of the measured Knight shift and the spin-relaxation rate....

Photoluminescence ~PL! of self-organized quantum dots ~QDs! in bilayer InAs/GaAs structures is studied with a fixed seed layer and spacer, but variable second-layer coverage. Careful line shape analysis reveals modulation in the high-energy tail of the seed-layer PL spectrum. The oscillation-like behavior is reproducible with variations in both the temperature and optical excitation energy. The...

We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-polemodulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB ba...

The single-electron circuit in the nature of discrete dynamical systems because it changes its state discontinuously because of electron tunneling. To confirm this, we designed a sample circuit consisting of two single-electron oscillators coupled with each other through a coupling capacitor. The oscillators produce relaxation oscillation and interact with each other to generate synchronization...

Abstract Slide-hold-slide (SHS) test is an essential experimental approach for studying the frictional stability of faults. The origin SHS framework was established based on a consistent constant normal stress, which cannot truly reflect stress disturbance around fault zones. In this paper, we conducted series ‘dynamic tests’, includes oscillations in relaxation stage with different oscillation...

We describe measurements of spectrally resolved turn-on and turn-off dynamics in a self-starting passively mode-locked fiber soliton laser. An intracavity quantum well optical amplifier whose bias is modulated changes the cavity losses, thereby switching the laser between continuous wave and mode-locked states. We show that during the transients, the laser undergoes a period of self Q switching...

The origin of life has previously been modeled by biological heat engines driven by thermal cycling, caused by suspension in convecting water. Here more complex heat engines are invoked to explain the origin of animals in the thermal gradient above a submarine hydrothermal vent. Thermal cycling by a filamentous protein ‘thermotether’ was the result of a temperature-gradient induced relaxation o...

We study the tunneling density of states ~DOS! of the interacting electron gas beyond the diffusive limit. A strong correction to the DOS persists even at electron energies exceeding the inverse transport relaxation time, which could not be expected from the well-known Altshuler-Aronov-Lee ~AAL! theory. This correction originates from the interference between the electron waves scattered by an ...