A heart monitoring system for a person includes one or more wireless nodes; and a wearable appliance in communication with the one or more wireless nodes, the appliance monitoring vital signs.

Health monitoring appliance

A health care monitoring system for a person includes one or more wireless nodes forming a wireless mesh network; a wearable appliance having a sound transducer coupled to the wireless transceiver; and a heart attack or stroke attack sensor coupled to the wireless mesh network to communicate patient data over the wireless mesh network to detect a heart attack or a stroke attack.

Mesh network stroke monitoring appliance

A medical system includes a network; one or more medical data collection appliances coupled to the network, each appliance transmitting data conforming to an interoperable format; and a server coupled to the network to store data for each individual in accordance with the interoperable format.

Systems and methods for providing interoperability among healthcare devices

/pdf/statistical-theory-of-communication-4wy4yg9ato.pdf

Statistical Theory of Communication

https://www3.nd.edu/~pantsakl/Publications/292-Automatica03.pdf

Brief On the model-based control of networked systems

The estimation of an aircraftmotionfrom the optical  ow observed by a downward-lookingbody- xed camera is discussed. The estimation is based on the so-called subspace constraint, which arises when points stationary on the environment are tracked on the image plane. The constraint can be combined with the aircraft dynamics, giving rise to a nonlinear estimation problem. The problem was solved using an implicit extended Kalman  lter. The suggested algorithmwas implemented in a simulation,which veri ed that the angle of attack, the angle of sideslip, and the angular body pitch, yaw, and roll rates could be estimated. The estimation was shown to be unbiased with a Monte Carlo method. Furthermore, the standard deviations of the estimation errors converged to reasonable values after a relatively small time interval. An important feature of the method is that good performance was achieved even when tracking a relatively small number of feature points, implyingmodest real-time computational needs. The estimated signals could be used either for navigationor control.

Partial Aircraft State Estimation from Visual Motion Using the Subspace Constraints Approach

A non-invasive and portable apparatus is provided in order to monitor parameters indicative of heart performance, such as blood flow, and comprises at least one sensor adapted to continuously sense factors correlated with blood flow and collect data related to the flow of blood, the sensor is adapted to be positioned adjacent to a peripheral blood vessel and worn preferably on a wrist. The apparatus further comprises a processor adapted to receive the collected data from the sensor and calculate the parameters indicating heart performance and a monitor on which the parameters indicating heart performance are displayed.

Apparatus and method for non-invasive monitoring of heart performance

In many filtering problems of practical interest, some of the noise signals satisfy the assumptions of H 2 (KalmanBucy) filtering, while others can be more accurately modeled as bounded energy signals (hence more amenable to an H, filtering approach). These problems may be addressed by considering a mixed H 2 I ? i , filtering problem. In this paper we present a novel theory which solves the mixed problem ezac t ly and in a computationally efficient way. The applicability of the theory is illustrated by designing a filter to estimate the states of an aircraft flying through a downburst.

http://robustsystems.coe.neu.edu/sites/robustsystems.coe.neu.edu/files/systems/papers/Rotstein_ACC94.pdf

H2/H∞ filtering theory and an aerospace application

This paper presents a complete solution to the H2 and $H^\infty$ problems for sampled-data systems. As opposed to previous works in the area, it is assumed here that all or some of the sampling function, the discrete-time controller, and the hold function are available for design. The solution is obtained by transforming the problem to discrete time using the well-known lifting technique. It is then shown that the desired components of the sampled-data controller can be "peeled-off" from the inherently infinite-dimensional description in the lifted-domain. The procedure for doing this last step is central to the approach in this paper. Both new and revised solutions are presented in this paper. The solution to the H2 problems is completely new. The solution to the $H^\infty$ problems is presented in a unifying framework and is more transparent than the previous existing solutions in the literature. Transparency pays in the form of clearer results. In particular, a separation structure is established between the design of (sub)optimal hold and sampler.

http://leo.technion.ac.il/publications/LiftedDesign/TME450.pdf

H 2 and $H^\infty$ Design of Sampled-Data Systems Using Lifting. Part I: General Framework and Solutions

Standard H/sub /spl infin// optimization cannot handle specifications or constraints on the time response of a closed-loop system exactly. In this paper, the problem of H/sub /spl infin// optimization subject to time-domain constraints over a finite horizon is considered. More specifically, given a set of fixed inputs w/sup i/, it is required to find a controller such that a closed-loop transfer matrix has an H/sub /spl infin//-norm less than one, and the time responses y/sup i/ to the signals w/sup i/ belong to some prespecified sets /spl Omega//sup i/. First, the one-block constrained H/sub /spl infin// optimal control problem is reduced to a finite dimensional, convex minimization problem and a standard H/sub /spl infin// optimization problem. Then, the general four-block H/sub /spl infin// optimal control problem is solved by reduction to the one-block case. The objective function is constructed via state-space methods, and some properties of H/sub /spl infin// optimal constrained controllers are given. It is shown how satisfaction of the constraints over a finite horizon can imply good behavior overall. An efficient computational procedure based on the ellipsoid algorithm is also discussed. >

Hector Rotstein

Papers

Partial Aircraft State Estimation from Visual Motion Using the Subspace Constraints Approach

Apparatus and method for non-invasive monitoring of heart performance

H2/H∞ filtering theory and an aerospace application

H 2 and $H^\infty$ Design of Sampled-Data Systems Using Lifting. Part I: General Framework and Solutions

H/sub /spl infin// optimization with time-domain constraints