Closed-loop schemes optimizing power allocation can be applied if Channel Status Information (CSI) is available at both transmitter and receiver. However, CSI is never ideal and algorithms performance degrades rapidly when CSI is poor. In this contribution a MMSE cost function that takes into account channel uncertainty is proposed for MIMO systems with OFDM modulation. The derived algorithm is...

Transformation of different types of switched-capacitor (SC) biquad filter stages based on FleischerLaker biquad SC structure in order to support oscillation based testing (OBT) have been proposed. The derived solutions are based on the generic Fleischer-Laker biquad SC structure assuming ideal characteristics of the employed components. In this paper, we explore the operation of the proposed O...

An extrinsic time is identified in most isotropic and homogeneous cosmological models by matching them with the ideal clock a parametrized system whose only “degree of freedom” is time -. Once this matching is established, the cosmological models are quantized in the same way as the ideal clock. The space of solutions of the Wheeler-DeWitt equation is turned out into a Hilbert space by insertin...

BACKGROUND The protein equivalent of total nitrogen appearance (PNA) is assumed to be a reliable estimate of dietary protein intake in haemodialysis patients. Protein requirements are related to body size. In order to standardize PNA to individual differences in body size, PNA is normalized to various terms related to the patient's body weight. It is not clear which is the most appropriate meth...

We study conditions under which the objective functions of a multi-objective 0-1 integer linear program guarantee the existence of an ideal point, meaning the existence of a feasible solution that simultaneously minimizes all objectives. In addition, we study the complexity of recognizing whether a set of objective functions satisfies these conditions: we show that it is NPhard, but can be solv...

Ranking of fuzzy numbers play an important role in decision making, optimization, forecasting etc. Fuzzy numbers must be ranked before an action is taken by a decision maker. The main aim of this paper is to propose a new approach for the ranking of generalized fuzzy numbers. The proposed ranking approach is based on distance between positive ideal solution and negative ideal solution. The main...

We consider solutions to the complex Trkalian equation, ~ ∇×~c = ~c, where ~c is a 3 component vector function with each component in the complex field, and may be expressed in the form ~c = e ~ ∇F, with g real and F complex. We find, there are precisely two classes of solutions; one where g is a Cartesian variable and one where g is the spherical radial coordinate. We consider these flows to b...

In this paper, we study the motion of rigid bodies in a perfect incompressible fluid. The rigid-fluid system fils a bounded domain in R3. Adapting the strategy from Bourguignon and Brezis [1], we use the stream lines of the fluid and we eliminate the pressure by solving a Neumann problem. In this way, the system is reduced to an ordinary differential equation on a closed infinite dimensional ma...

SUMMARY In this paper we are concerned with networks obtained by connecting independent sources, linear resistors and nonlinear ideal op amps. A necessary and sufficient condition for the existence and uniqueness of solutions for every positive output saturation voltage of the op amps and every value of the independent sources is found.

Neuro-Education is a nascent discipline that seeks to blend the collective fields of neuroscience, psychology, cognitive science, and education to create a better understanding of how we learn and how this information can be used to create more effective teaching methods, curricula, and educational policy. Though still in its infancy as a research discipline, this initiative is already opening ...