The ability to perform efficient and robust locomotion is crucial condition for real-world legged robots. Unlike running and walking [1], stable hopping cannot be achieved with a fixed angle of attack with respect to ground. Also, the region of attraction for stable running is quite small with fixed angle of attack. This drawback and sensitivity to running velocity and control parameters exist ...

A time-hopping modulation format employing impulse signal technology has several features which may make it attractive for multiple-access communications. These features are outlined, an estimate of the multipleaccess capability of a communication system employing this format under ideal propagation conditions is presented, and emerging design issues are described. Time Hopping with Impulses Th...

In this paper we present and experimentally validate a control method for regulating both the forward speed and the apex height of a one legged hopping robot, using only a single actuator. The control method is based on a dynamic model of the hopping robot and makes use of the dynamic coupling of the vertical and forward motions of the robot. The control is applied first to a simulated model of...

The realization of strong coherent interactions between individual photons is a long-standing goal in science and engineering. In this report, based on recent experimental setups, we derive a strong photon long-range repulsive interaction, by controlling the van der Waals repulsive force between Cesium Rydberg atoms located inside different cavities in extended Jaynes-Cummings-Hubbard lattices....

In military and commercial applications FH (Frequency Hopping) signal plays important role. Since the Frequency hopping signals has the special properties like robustness to jamming and near-far resistance, we find the application of FH signals in every communication process. Even though the Frequency Hopping signals exhibits the near-far resistance problem, the signals are suffered from noise....

Temperature, T, dependence of the electrical conductivity, σ, of own-made polyaniline pellets, highly doped either by HCl or by dodecylbenzenesulphonic acid, is discussed. For the both dopants, a variable-range-hopping exponent 2/5 is found below T * ≈ 200−250 K. This result can be understood on the basis of a recent theory of Fogler, Teber and Shklovskii which takes into account Coulomb correl...

In this paper we propose a TDMA Slow Frequency Hopping-Trellis Coded 8DPSK scheme for indoor mobile radio communications. In order to assess the performance of this scheme a GWSSUS (Gaussian Wide Sense Stationary Uncorrelated Scattering) continuous channel model with an exponentiol Power Delay Profire has been adopted. This channel model allows us to analize transmission rates much lower than t...

Weibel and Taylor's theory of symmorphosis predicts that the structural components of the respiratory system are quantitatively adjusted to satisfy, but not exceed, an animal's maximum requirement for oxygen. We tested this in the respiratory system of the adult migratory locust Locusta migratoria by comparing the aerobic capacity of hopping and flight muscle with the morphology of the oxygen c...

We propose and implement a highly efficient augmented surface hopping algorithm that (i) can be used for large simulations (with many nuclei and many electronic states) and (ii) includes the effects of decoherence without parametrization. Our protocol is based on three key modifications of the surface hopping methodology: (a) a novel separation of classical and quantum degrees of freedom that t...