This paper investigates the discrete-time per-sample model of the zero-dispersion optical fiber. It is shown that the capacityachieving input distribution is unique, has (continuous) uniform phase and discrete amplitude with a finite number of mass points. The optimality of this multi-ring input holds when the channel is subject to general input cost constraints that include peak power constrai...

We present a method for achieving geometrical constraint stabilization for a linear-complementaritybased time-stepping scheme for rigid multibody dynamics with joints, contact, and friction. The method requires the solution of only one linear complementarity problem per step. We prove that the velocity stays bounded and that the constraint infeasibility is uniformly bounded in terms of the size...

We make a novel connection between an energy-efficient wireless transmission scheduling problem and a multi-period, multi-item inventory control problem with stochastic convex ordering costs, deterministic demands, and a joint budget constraint. In the special case of a single item, we show that a state-dependent modified base-stock policy is optimal when the stochastic ordering costs are linea...

than at the motor level, yet still firmly anchored on a particular situation of actions rather than detached. To understand the proximal intentions of others, it is thus not enough that one be able to retrieve the immediate motor goal of an observed movement, one must also infer its possible significance given further information about the situation in which it occurs. Moreover, given that even...

This work aims at presenting, in a comprehensive manner, several approaches to model and simulate closed loop topologies using the classical Lagrangian formulation. One of great advantages approach is its simplicity easiness obtaining equations motion. However, critical aspect arises when mechanical systems include topologies, since process deriving motion becomes complex task. The key point pr...

Proprioception plays an integral role in neuromotor control of the knee joint and deficits in knee joint proprioception are well documented in individuals with knee osteoarthritis (OA). However, the functional relevance of these deficits is not clear. This cross-sectional study evaluated the relationship between knee joint proprioception and pain and disability in a large cohort of individuals ...

We report that double-helical DNA constraints can be used to control the conformation of another molecule, RNA. When a covalently attached DNA constraint is structurally incompatible with the native Mg2+-dependent RNA conformation, RNA folding is disrupted, as revealed by nondenaturing gel electrophoresis and independently by chemical probing. Our approach is distinct from other efforts in DNA ...

The care of older persons can have negative impact on the caregiver. The objective of this population-based observational study is to identify problems experienced by informal caregivers, and the extent of related difficulties, in their care of older care-dependent recipients with and without cognitive impairment. Caregivers (n = 2,704) caring for a home-dwelling person aged ≥ 75 years responde...