Particle-hole symmetric localization problems are studied in low dimensions with the emphasis on understanding the origin of the observed singularities in the low-energy density of states. Pure imaginary random hopping and bipartite random hopping problems are considered. In quasi-1D geometry, such systems generically exhibit localized behavior, and are also found to have power-law density of s...

Frequency-hopping communication is widely used in the field of military communication, which has the capability to resist interference. In frequency-hopping system, narrowband interference signals exist in partial dehopping frequency-hopping signals, equivalent to time-varying interference signals existed in the frequency-hopping signals. Through integrating the diversity combining with singula...

Animal locomotion results from a combination of power modulation and cyclic appendage trajectories, but combining these two properties in small-sized robots is difficult. Here, we introduce characterize new elastic actuation system based on an inverted cam that capable generating with controlled energy charge release for robots. We designed leg linkage attached to the develop single legged hopp...

Locomotion capabilities form the basis for accomplishing robotic exploration by a rover on an asteroid. While traditional locomotion gears, such as wheels and tracks, are promising candidates for traversing extraterrestrial terrains, their capabilities lower in such an environment due to its micro-gravity. Here, we propose a new idea of ciliary micro-hopping mechanism for an asteroid exploratio...

Abstract Two dimensional quantum materials possessing Dirac cones in their spectrum are fascinating due to emergent low-energy fermions. In 8Pmmn borophene the cone is furthermore tilted, which a proxy for spacetime geometry, since future light-cone depends on underlying metric. Therefore it important understand microscopic origin of tilt. Here, based ab-initio calculations, we decipher atomist...