329 research outputs found
Additional file 3 of Long-term individualized monitoring of sympatric bat species reveals distinct species- and demographic differences in hibernation phenology
No full textAdditional file 3. Raw data for: F. Meier, L. Grosche, C. Reusch, V. Runkel, J. van Schaik and G. Kerth. BMC Ecology and Evolution, 2022. Long-term individualized monitoring of sympatric bat species reveals distinct species- and demographic differences in hibernation phenology
Empirische Inklusionsforschung in bildungsräumlichen Kontexten – Anschlussmöglichkeiten für eine regionale und inklusive Schulentwicklung
No full textStošić P, Thönnes L, Hackbarth A. Empirische Inklusionsforschung in bildungsräumlichen Kontexten – Anschlussmöglichkeiten für eine regionale und inklusive Schulentwicklung. In: Grosche M, Decristan J, Urton K, Jansen NC, Bruns G, Ehl B, eds. Sonderpädagogik und Bildungsforschung – Fremde Schwestern?. klinkhardt forschung. Perspektiven sonderpädagogischer Forschung . Bad Heilbrunn: Julius Klinkhardt; 2020: 138-143
Path integrals for potential problems with -function perturbation
No full textThe author presents several examples of potential problems with a δ-function perturbation by means of path integrals. The idea is to sum a perturbation series expansion resulting in an energy-dependent Green function G(E). The energy levels E of the perturbed problem are determined by the equation (one-dimensional case) iG(a, a; E)=/ gamma where G is the Green function of the unperturbed problem, gamma is the strength of the δ potential and a its location in R. In D-dimensional radial problems with a spherically shaped delta function located at r=a this equation changes into iGl(a, a; E)=/a , where l denotes the angular momentum number
Path integral approach for superintegrable potentials on spaces of non-constant curvature: II. Darboux spaces DIII and DIV
No full textThis is the second paper on the path integral approach of superintegrable systems on Darboux spaces, spaces of non-constant curvature. We analyze five and four superintegrable potentials in the spaces D III and D IV, respectively; these potentials were first given by Kalnins et al. We are able to evaluate the path integral in most of the separating coordinate systems, leading to expressions for the Green's functions, the discrete and continuous wavefunctions, and the discrete energy spectra. In some cases, however, the discrete spectrum cannot be stated explicitly because it is determined by a higher-order polynomial equation. We also show that the free motion in a Darboux space of type III can contain bound states, provided the boundary conditions are appropriate. We can state the corresponding energy spectrum and the wavefunctions. � 2007 Pleiades Publishing, Ltd
Path integrals for two- and three-dimensional -function perturbations
No full textThe incorporation of two- and three-dimensional Δ-function perturbations into the path integral formalism is discussed. Contrary to the one-dimensional case, a regularization prescription is needed due to the divergence of the Green function corresponding to a potential V, G(v) (x,y;E) (x, y ϵ ℝ2, ℝ3) for x→y. The known procedure to define proper self-adjoint extensions for Hamiltonians with point-interactions can be exploited to define the incorporation of δ-function perturbations in the path integral. Several examples illustrate the formalism
Separation of variables in path integrals and path integral solution of two potentials on the Poincare upper half-plane
No full textThe author discusses how to separate variables in path integrals. It is assumed that a one-dimensional problem with potential V(x) has an exact solution with energy levels Elambda and wavefunctions Psi lambda . In order to perform the separation of variables, a time transformation is performed back and forth in the path integral which allows one to insert the path integral solution corresponding to the potential V(x). The author illustrates the method by discussing some specific potential problems on the Poincare upper half-plane
Grosche, Harry (Death, 1889-10-09)
No full textAddress: 13 Abagail St.Age at death: 2 yrsPg 109/1889/131/M W S/City/Dr. G. H. C. Richard/B. Schroer/St. Joseph's OldOriginal record filed in drawer labeled 'GRIESS-GROTE, H'
Grosche, Christopher (Death, 1893-07-24)
No full textAddress: 140 Abigail St.Age at death: 76 yrs.501/Pg 75/1893/MW Wr/Germany/Dr. G. H. C. Richard/Schroer/St. John'sOriginal record filed in drawer labeled 'GRIESS-GROTE, H'
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