In this paper we consider Schrödinger operators −∆+ V (x), V ∈ L∞(Rd) acting in the space L(R). If V = 0 then the operator has purely absolutely continuous spectrum on (0,+∞). We find conditions on V which guarantee that the absolutely continuous spectrum of both operators H+ = −∆ + V and H− = −∆− V is essentially supported by [0,∞). This means that the spectral projection associated to any sub...

This paper explores the relationship between Situation Awareness, Common Operating Pictures and Data Fusion to expose the need for Situation and Impact Assessments. A framework for Situation Assessments is then proposed and illustrated through reference to footage from the movie, “The Hunt for Red October”

Nominal polysemy: a systematic polysemy. (1) a. There are many pictures in this book. b. This book is very difficult to understand. (2) a. Mary has painted the window. b. Paul got out through the window. 3 traditional approaches to nominal polysemy: Classical polysemy. Nominal expressions are assigned different meanings ((1): abstract text vs concrete object; (2): concrete object vs opening for...

Although there is general agreement that a removal of classical gravitational singularities is not only a crucial conceptual test of any approach to quantum gravity but also a prerequisite for any fundamental theory, the precise criteria for non-singular behavior are often unclear or controversial. Often, only special types of singularities such as the curvature singularities found in isotropic...

Let g(z, x) denote the diagonal Green's matrix of a self-adjoint m × m matrix-valued Schrödinger operator H = − d 2 dx 2 Im + Q(x) in L 2 (R) m , m ∈ N. One of the principal results proven in this paper states that for a fixed x 0 ∈ R and all z ∈ C + , g(z, x 0) and g ′ (z, x 0) uniquely determine the matrix-valued m × m potential Q(x) for a.e. x ∈ R. We also prove the following local version o...

preview 1 Network Pictures as a Research Device: Developing a Tool to Capture Actors’ Perceptions in Organizational Networks Carla Ramos mIMP Research Group, University of Manchester, Booth Street West, Manchester, United Kingdom E-mail: [email protected] David Ford Euromed, Ecole de Management, Marseilles, France E-mail: [email protected] 25 IMP Conference (2009) Euromed Ma...

Whether and how much the routine use of language influences thought is a perennially fascinating question in cognitive science . The current paper addresses this issue by examining whether the presence of spatial language influences the encoding and memory of simple pictures .

this is a picture review of a case of orbital rhabdomyosarcoma. the course of patients diagnosis, treatment and outcome is briefly presented.

It is important to transmit pictures efficiently in most Web sites, especially for those users with low bandwidth connections. In this demonstration, we propose a system which progressively transmits images using a very low transmission rate (as low as 15% in some cases). The transmitted images maintain a reasonable picture quality for the users to browse images quickly. Interested readers can ...