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We find the Shannon limit to bit error rate (BER) as a function of E_b/N_0 for linear coded modulations. Error performance of TCM and other schemes can be compared to this curve. As the bandwidth of the signals in Hz-s/data bit drops, capacity becomes sensitive to the stopband spectrum, and the limit moves strongly away from the BER of practical systems when the stopband rolloff is not severe.

In this paper, wave splitting technique is applied to a homogeneous Timoshenko beam. The purpose is to obtain a diagonal equation in terms of the split fields. These fields are calculated in the time domain from an appropriate set of boundary conditions. The fields along the beam are represented as a time convolution of Green functions with the excitation. The Green functions do not depend on the

A relation between the radiation resistance and the quasi-static polarizability, input capacitance, and input inductance for small electric dipole antennas is investigated. The relation follows from the forward scattering sum rule and sum rules for the input impedance together with resonance models for the partial realized gain and the reflection coefficient.

COVID-19 disease models have aided policymakers in low-and middle-income countries (LMICs) with many critical decisions. Many challenges remain surrounding their use, from inappropriate model selection and adoption, inadequate and untimely reporting of evidence, to the lack of iterative stakeholder engagement in policy formulation and deliberation. These issues can contribute to the misuse of mode

We study the realizability and strong satisfiability problems for SAFETY LTL, a syntactic fragment of Linear Temporal Logic ([Formula presented]) capturing safe formulas. While it is well-known that realizability for this fragment lies in [Formula presented], the best-known lower bound is [Formula presented]-hardness. Surprisingly, closing this gap has proven an elusive task. Previous works have c

The Bremmer series is used to reduce a complex scattering problem to a sequence of simpler single scattering problems. In the Bremmer series, the wave equation is first decomposed into a coupled system of one-way wave equations. The system is then decoupled into a sequence of one-way wave equations with a fixed point iteration. In this paper, a left symbol representation of the decomposition opera

The Writer:
Sigrid Combüchen was born in Solingen in the German Ruhr territory 1942. Shortly after the War her family moved to Sweden. She is a Swedish writer and literary critic and has so far published seven novels, a collection of essays and a biography (on the Norwegian novelist and winner of the Nobel Prize in Literature 1920, Knut Hamsun). She received the 2004 Selma Lagerlöf Prize a

This paper presents a readily computable formula for the real stability radius with respect to an arbitrary stability region in the complex plane.