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In this paper we explore the mechanism of energy transfer between the single actuated DOF of a one-legged hopping robot and the remaining unactuated DOFs, during stable running. The concept of the energy transfer mechanism is laid out, after which follows an analytical study. Using this study, an initial controller is derived for the control of a simple SLIP model with friction in the leg and h...

An LSI is fabricated and measured to demonstrate the feasibility of the VDD-hopping scheme in a system level. In the scheme, supply voltage, VDD, is dynamically controlled through software depending on workload. The VDD-hopping scheme is shown to reduce the power to less than 1/4 compared with the conventional fixed-VDD scheme. The power saving is achieved without degrading the real-time featur...

In the present work ferromagnetic ordering in the Hubbard model generalized by taking into account the inter-atomic exchange interaction and correlated hopping in partially filled narrow band is considered. Expressions for the magnetization and Curie temperature as functions of model parameters and band filling are obtained in the case of weak intra-atomic Coulomb interaction. Condition of ferr...

A mechanism called Eligibility Propagation is proposed to speed up the Time Hopping technique used for faster Reinforcement Learning in simulations. Eligibility Propagation provides for Time Hopping similar abilities to what eligibility traces provide for conventional Reinforcement Learning. It propagates values from one state to all of its temporal predecessors using a state transitions graph....

An F-TDMA (Frequency and Time Division Multiple Access) based mobile radio system using both Dynamic Channel Allocation (DCA) and Frequency Hopping (FH) is investigated in this work. This paper follows [1] and [2], where the same Authors proposed a new Interference Adaptive DCA algorithm that is suitably designed for a network implementing FH. The role played jointly by the Power Control and Ha...

Hölder continuity, |Nλ(E) − Nλ(E )| ≤ C|E − E|, with a constant C independent of the disorder strength λ is proved for the integrated density of states Nλ(E) associated to a discrete random operator H = Ho + λV consisting of a translation invariant hopping matrix Ho and i.i.d. single site potentials V with an absolutely continuous distribution, under a regularity assumption for the hopping term.