Results 1 to 10 of about 2,466 (126)

Geometric principles of second messenger dynamics in dendritic spines. [PDF]

Sci Rep, 2019
Dendritic spines are small, bulbous protrusions along dendrites in neurons and play a critical role in synaptic transmission. Dendritic spines come in a variety of shapes that depend on their developmental state.
Cugno A, Bartol TM, Sejnowski TJ, Iyengar R, Rangamani P.   +4 more
europepmc   +4 more sources

New Exact and Numerical Solutions of the (Convection-)Diffusion Kernels on SE(3) [PDF]

, 2016
We consider hypo-elliptic diffusion and convection-diffusion on $\mathbb{R}^3 \rtimes S^2$, the quotient of the Lie group of rigid body motions SE(3) in which group elements are equivalent if they are equal up to a rotation around the reference axis.
Duits, R., Portegies, J. M.
core   +4 more sources

3D simulations of linearized scalar fields in Kerr spacetime [PDF]

, 2003
We investigate the behavior of a dynamical scalar field on a fixed Kerr background in Kerr-Schild coordinates using a 3+1 dimensional spectral evolution code, and we measure the power-law tail decay that occurs at late times.
A. Gullstrand, Adrienne L. Erickcek, B. Szilágyi, C. Gundlach, C.V. Vishveshwara, E. Poisson, E.S.C. Ching, G. Calabrese, G. Calabrese, H. Friedrich, Harald P. Pfeiffer, L. Barack, L. Barack, L. Lindblom, L.E. Kidder, L.E. Kidder, L.M. Burko, L.M. Burko, Lawrence E. Kidder, Lior M. Burko, M. Bjørhus, M.A. Scheel, Mark A. Scheel, N. Fröman, P. Painlevé, R.H. Price, S. Frittelli, S. Frittelli, S. Hod, Saul A. Teukolsky, W. Krivan, W. Krivan   +31 more
core   +3 more sources

High accuracy binary black hole simulations with an extended wave zone [PDF]

, 2009
We present results from a new code for binary black hole evolutions using the moving-puncture approach, implementing finite differences in generalised coordinates, and allowing the spacetime to be covered with multiple communicating non-singular ...
A. Ashtekar, B. Gustafsson, Christian Reisswig, Denis Pollney, Erik Schnetter, H. Bateman, M. Alcubierre, N. Bishop, Nils Dorband, Peter Diener, T. Goodale   +10 more
core   +3 more sources

Bounding the greybody factors for scalar excitations of the Kerr-Newman spacetime [PDF]

, 2014
Finding exact solutions for black-hole greybody factors is generically impractical; typically one resorts either to making semi-analytic or numerical estimates, or alternatively to deriving rigorous analytic bounds.
Boonserm, Petarpa, Ngampitipan, Tritos, Visser, Matt   +2 more
core   +2 more sources

Slepian Spatial-Spectral Concentration on the Ball [PDF]

, 2014
We formulate and solve the Slepian spatial-spectral concentration problem on the three-dimensional ball. Both the standard Fourier-Bessel and also the Fourier-Laguerre spectral domains are considered since the latter exhibits a number of practical ...
Kennedy, Rodney A., Khalid, Zubair, McEwen, Jason D.   +2 more
core   +2 more sources

Quasi-Normal Modes of Stars and Black Holes [PDF]

, 1999
Perturbations of stars and black holes have been one of the main topics of relativistic astrophysics for the last few decades. They are of particular importance today, because of their relevance to gravitational wave astronomy.
A Bachelot, A Bachelot, A Borelli, A Burrows, A Gautschy, A Gautschy, AD Rendall, AM Abrahams, AM Abrahams, AM Abrahams, AS Barreto, B Majumdar, B Simon, B Xanthopoulos, BF Schutz, BF Schutz, BF Schutz, BF Schutz, BF Whiting, BJ Owen, BP Jensen, BS Kay, C Cutler, C Cutler, C Cutler, C Gundlach, C Gundlach, CM Bender, CT Cunningham, CT Cunningham, CT Cunningham, CV Vishveshwara, CW Misner, D Lai, DL Gunter, E Seidel, E Seidel, E Seidel, E Seidel, E Seidel, E Seidel, E Seidel, EE Flanagan, EE Flanagan, ESC Ching, ESC Ching, EW Leaver, EW Leaver, EW Leaver, F Echeverria, F John, FJ Zerilli, FJ Zerilli, FP Pijpers, G Allen, H Liu, H Liu, H Onozawa, H-P Nollert, H-P Nollert, H-P Nollert, H-P Nollert, HJ Blome, HM Horn Van, HR Beyer, HR Beyer, J Ipser, J Meixner, J Pullin, JB Hartle, JL Dunham, JL Friedman, JL Friedman, JM Bardeen, JM Stewart, JP Cox, JW Guinn, JW Harvey, K Skibsted, K Tominaga, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KD Kokkotas, KS Thorne, KS Thorne, KS Thorne, KS Thorne, KS Thorne, L Barack, L Bildsten, L Blanchet, L Lindblom, L Lindblom, L Lindblom, LS Finn, LS Finn, LS Finn, M Bruni, M Davis, M Leins, M Ruffert, ME Araujo, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Andersson, N Fröman, P Anninos, P Anninos, PN McDermott, PN McDermott, PO Fröman, PR Brady, R Melrose, R Mönchmeyer, RC Duncan, RF Stark, RH Price, RH Price, RH Price, RH Price, RH Price, RH Price, RJ Gleiser, RJ Gleiser, RJ Gleiser, RJ Gleiser, S Bergh Van den, S Bonazzola, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Chandrasekhar, S Frasca, S Iyer, S Iyer, S Kind, S Persides, S Shapiro, S Teukolsky, S Teukolsky, S Yamada, S Yoshida, SL Detweiler, SL Detweiler, SL Detweiler, SL Detweiler, SL Detweiler, SL Detweiler, SL Detweiler, T Baumgarte, T Damour, T Nakamura, T Regge, T Zwerger, TG Cowling, TJM Zouros, V Ferrari, V Ferrari, V Ferrari, V Moncrief, V Moncrief, V Moncrief, W Heisenberg, W Krivan, W Krivan, W Unno, WG Baber, WH Press, WH Press, Y Kojima, Y Kojima, Y Kojima, Y Kojima, Y Levin, Y Sun, Y Sun, Z Andrade   +203 more
core   +3 more sources

Solving the m-mixing problem for the three-dimensional time-dependent Schr\"{o}dinger equation by rotations: application to strong-field ionization of H2+ [PDF]

, 2006
We present a very efficient technique for solving the three-dimensional time-dependent Schrodinger equation. Our method is applicable to a wide range of problems where a fullly three-dimensional solution is required, i.e., to cases where no symmetries ...
B. M. Smirnov, H. G. Muller, L. A. A. Nikolopoulos, L. B. Madsen, L. V. Keldysh, T. K. Kjeldsen   +5 more
core   +2 more sources

Method for prediction magnetic silencing of uncertain energy-saturated extended technical objects in prolate spheroidal coordinate system

Electrical engineering & Electromechanics
Aim. Development of method for prediction by energy-saturated extended technical objects magnetic silencing based on magnetostatics geometric inverse problems solution and magnetic field spatial spheroidal harmonics calculated in prolate spheroidal ...
B. I. Kuznetsov, A. S. Kutsenko, T. B. Nikitina, I. V. Bovdui, K. V. Chunikhin, V. V. Kolomiets   +5 more
doaj   +1 more source

Method for reduction of magnetic field of uncertain extended technical objects based on their multyspheroidal model and compensating magnetic dipoles

Electrical engineering & Electromechanics
Problem. The implementation of strict requirements for magnetic silence of elongated energy-saturated objects such as naval vessel and submarines is an important scientific and technical problem of magnetism of technical objects. Purpose.
B. I. Kuznetsov, T. B. Nikitina, I. V. Bovdui, K. V. Chunikhin, V. V. Kolomiets, B. B. Kobylianskyi   +5 more
doaj   +1 more source