We construct a family of exact functors from the BernsteinGelfand-Gelfand category O of sln-modules to the category of finite-dimensional representations of the degenerate affine Hecke algebra Hl of GLl. These functors transform Verma modules to standard modules or zero, and simple modules to simple modules or zero. Any simple Hl-module can be thus obtained. Introduction The classical Frobenius...

new power amplifier (PA) architecture is proposed as a more power efficient way to amplify modulated signals at radio-frequencies (RF) compared to conventional polar power amplifiers. Polar PA's, using the Envelope Elimination and Restoration (EER) linearizing technique for high efficiency switch mode amplifiers provide amplification for modulated signals at RF with high efficiency and linearit...

In this work, Orthogonal Frequency Division Multiplexing’s (OFDM) principles, implementation design or high-level system architecture and application were reviewed. The condition for orthogonality, frequency spacing between consecutive subcarriers (called spacing) was established analytically with practical instance highlighted. review also covers Fast Fourier Transform (FFT) which serves as a ...

Our patients had typical features of factitious disease,1 2 three of them developing anorexia nervosa. They had been bleeding themselves for four to 11 years and were well adapted to severe chronic anaemia with haemoglobin concentrations rarely above 60 gll. Their physical fitness was remarkable, and, notably, they tailored their bleeding such that it did not jeopardise an active life. Although...

Presently, the ferrites industry consumes large amounts of iron osides obtained by spray roasting of steel pickling liquors. The aim of this paper is to propose the synthesis of optimal iron osidcs by oxyprecipitation of steel pickling liquors in order to obtain Bahexafenite wit11 high magnetic properties using the ceramic process. As a raw material. i t was used sulphuric liqoors with iron con...

Various concepts of orthogonality on the real line are reviewed that arise in connection with quadrature rules. Orthogonality relative to a positive measure and Gauss-type quadrature rules are classical. More recent types of orthogonality include orthogonality relative to a sign-variable measure, which arises in connection with Gauss-Kronrod quadrature, and power (or implicit) orthogonality enc...

We present computational methods and subroutines to compute Gaussian quadrature integration formulas for arbitrary positive measures. For expensive integrands that can be factored into well-known forms, Gaussian quadrature schemes allow for efficient evaluation of high-accuracy and -precision numerical integrals, especially compared to general ad hoc schemes. In addition, for certain well-known...

A new design methodology for reconfigurable quadrature band-pass ΣΔ modulator is proposed. The methodology uses architectures, which locks various range of IF frequencies to the sampling frequency for lower order quadrature modulators. A gereralized integrator based architecture is developed from the delay architectures. The method is presented with derivation of the base circuitry and with thi...

We present a simple numerical method for constructing the optimal (generalized) averaged Gaussian quadrature formulas which are the optimal stratified extensions of Gauss quadrature formulas. These extensions exist in many cases in which real positive Kronrod formulas do not exist. For the Jacobi weight functions w(x) ≡ w(α,β)(x) = (1− x)α(1 + x)β (α, β > −1) we give a necessary and sufficient ...

Abstract: For finite positive Borel measures supported on the real line we consider a new type of quadrature rule with maximal algebraic degree of exactness, which involves function derivatives. We prove the existence of such quadrature rules and describe their basic properties. Also, we give an application of these quadrature rules to the solution of a Cauchy problem without solving it directl...