The paper is devoted to the study of Toeplitz operators with piecewise continuous symbols. We clarify the geometric regularities of the behaviour of the essential spectrum of Toeplitz operators in dependence on their crucial data: the angles between jump curves of symbols at a boundary point of discontinuity and on the limit values reached by a symbol at that boundary point. We show then that t...

This paper studies a program that extends the maximum duration of unemployment benefits from 30 weeks to 209 weeks. Interestingly, this program is targeted to individuals aged 50 years or older, living in certain eligible regions in Austria. In the evaluation, I use sharp discontinuities in treatment assignment at age 50 and at the border between eligible regions and control regions to identify...

A discontinuity exists between modeling and objectoriented programming languages. This discontinuity is a consequence of ambiguous notions in modeling languages and lack of corresponding notions in objectoriented programming languages. It hinders the transition between software implementation and design and hampers software maintenance. This discontinuity is particularly acute for binary class ...

A discontinuity exists between modeling and objectoriented programming languages. This discontinuity is a consequence of ambiguous notions in modeling languages and lack of corresponding notions in objectoriented programming languages. It hinders the transition between software implementation and design and hampers software maintenance. This discontinuity is particularly acute for binary class ...

The solutions of the perturbed Riemann problem for the chromatography system of Langmuir isotherm with one inert component are constructed in completely explicit forms when the initial data are taken as three piecewise constant states. The wave interaction problem is investigated in detail by using the method of characteristics. In addition, the generalized Riemann problem with the delta-type i...

Kristine Jasper, Cornelia Weise, Isabell Conrad, Gerhard Andersson, Wolfgang Hiller and Maria Kleinstäuber, The working alliance in a randomized controlled trial comparing Internetbased self-help and face-to-face cognitive behavior therapy for chronic tinnitus, 2014, Internet Interventions, (1), 2, 49-57. http://dx.doi.org/10.1016/j.invent.2014.04.002 Copyright: Elsevier http://www.elsevier.com/