Impact of Link Unreliability and Asymmetry on the Quality of Connectivity in Large-scale Sensor Networks.

Connectivity is a fundamental issue in research on wireless sensor networks. However, unreliable and asymmetric links have a great impact on the global quality of connectivity (QoC). By assuming the deployment of nodes a homogeneous Poisson point process and eliminating the border effect, this paper derives an explicit expression of node non-isolation probability as the upper bound of one-connectivity, based on an analytical link model which incorporates important parameters such as path loss exponent, shadowing variance of channel, modulation, encoding method etc.

Real-time computation of a patient's respiratory effort during ventilation.

Objective: In this paper, a new algorithm is proposed to compute the spontaneously generated respiratory effort during ventilation.

Methods: The algorithm computes a ventilated patient's respiratory effort in real-time by analyzing the respiratory pressure and flow signals that are acquired from the ventilator. The method requires an initial period where the patient's respiratory muscles are fully relaxed, for example during or shortly after surgery.