Results 21 to 30 of about 1,628 (120)

Novel high-efficiency 2D position-sensitive ZnS:Ag/6LiF scintillator detector for neutron diffraction [PDF]

J Appl Crystallogr
A novel high‐efficiency 2D position‐sensitive wavelength‐shifting‐fibre ZnS:Ag/6LiF scintillator detector has been developed at ISIS for single‐crystal diffraction applications. More than a factor of 3 improvement in efficiency was achieved with this detector compared with clear‐fibre scintillator detectors, and software routines for further ...
Mauri G, Sykora G, Schooneveld E, Capelli S, Gutmann M, Howarth S, Mann S, Zuddas F, Rhodes N.   +8 more
europepmc   +2 more sources

ADM approach to 2+1 dimensional gravity coupled to particles [PDF]

, 1999
We develop the canonical ADM approach to 2+1 dimensional gravity in presence of point particles. The instantaneous York gauge can be applied for open universes or universes with the topology of the sphere.
't Hooft, 't Hooft, Arnowitt, Bellini, Carlip, Carrol, Deser, Domenico Seminara, Einstein, Hawking, Hosoya, Hosoya, Liouville, Menotti, Moncrief, Pietro Menotti, Poole, Waelbroeck, Waelbroeck, Welling, Welling   +20 more
core   +2 more sources

Weak values are universal in von Neumann measurements [PDF]

, 2012
We refute the widely held belief that the quantum weak value necessarily pertains to weak measurements. To accomplish this, we use the transverse position of a beam as the detector for the conditioned von Neumann measurement of a system observable.
Andrew N. Jordan, H. Breuer, Justin Dressel   +2 more
core   +3 more sources

Hosoya and Harary Polynomials of TOX(n),RTOX(n),TSL(n) and RTSL(n)

Discrete Dynamics in Nature and Society, 2019
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound.
Lian Chen, Abid Mehboob, Haseeb Ahmad, Waqas Nazeer, Muhammad Hussain, M. Reza Farahani   +5 more
doaj   +1 more source

Hamiltonian structure of 2+1 dimensional gravity [PDF]

, 2000
A summary is given of some results and perspectives of the hamiltonian ADM approach to 2+1 dimensional gravity. After recalling the classical results for closed universes in absence of matter we go over the the case in which matter is present in the form
A Ashtekar, A Bellini, A Hosoya, A Hosoya, A Staruszkiewicz, A Terras, AA Bolibrukh, G t’Hooft, G t’Hooft, H Maass, H Waelbroeck, J Liouville, J Nelson, JD Fay, L Cantini, LA Takhtajan, M Bourdeau, M Henneaux, M Welling, M Welling, M Yoshida, P Menotti, P Menotti, PG Zograf, R Arnowitt, R Puzio, RM Wald, S Carlip, S Deser, S Deser, S. Deser, S. Deser, SW Hawking, V Moncrief   +33 more
core   +3 more sources

The higher-order matching polynomial of a graph

International Journal of Mathematics and Mathematical Sciences, 2005
Given a graph G with n vertices, let p(G,j) denote the number of ways j mutually nonincident edges can be selected in G. The polynomial M(x)=∑j=0[n/2](−1)jp(G,j)xn−2j, called the matching polynomial of G, is closely related to the Hosoya index introduced
Oswaldo Araujo, Mario Estrada, Daniel A. Morales, Juan Rada   +3 more
doaj   +1 more source

Estimating persistence in the volatility of asset returns with signal plus noise models [PDF]

, 2010
This paper examines the degree of persistence in the volatility of financial time series using a Long Memory Stochastic Volatility (LMSV) model. Specifically, it employs a Gaussian semiparametric (or local Whittle) estimator of the memory parameter ...
Caporale, GM, Gil-Alana, LA
core   +2 more sources

Quantum singularities in spherically symmetric, conformally static spacetimes [PDF]

, 2013
A definition of quantum singularity for the case of static spacetimes has recently been extended to conformally static spacetimes. Here the theory behind quantum singularities in conformally static spacetimes is reviewed, and then applied to a class of ...
Helliwell, T. M., Konkowski, D. A.
core   +1 more source

Hamiltonian structure and quantization of 2+1 dimensional gravity coupled to particles [PDF]

, 2000
It is shown that the reduced particle dynamics of 2+1 dimensional gravity in the maximally slicing gauge has hamiltonian form. This is proved directly for the two body problem and for the three body problem by using the Garnier equations for ...
't Hooft G, 't Hooft G, 't Hooft G, 't Hooft G, 't Hooft G, Arnowitt R, Deser S, Deser S, Deser S, Domenico Seminara, Einstein A, Ginsparg P, Goldberg J N, Hawking S W, Hosoya A, Hosoya A, Kra I, Liouville J, Luigi Cantini, Matschull H-J, Misner C W, Okamoto K, Pietro Menotti, Poincaré H, Riesz F, Staruszkiewicz A, Takhtajan L, Takhtajan L, Takhtajan L A, Waelbroeck H, Wald R M, Welling M, Welling M, Yoshida M, Zograf P G   +34 more
core   +3 more sources

Time Optimal Unitary Operations [PDF]

, 2006
Extending our previous work on time optimal quantum state evolution, we formulate a variational principle for the time optimal unitary operation, which has direct relevance to quantum computation. We demonstrate our method with three examples, i.e.
A. Messiah, Akio Hosoya, Alberto Carlini, D. P. Bertsekas, M. A. Nielsen, M. A. Nielsen, P. W. Shor, Tatsuhiko Koike, Yosuke Okudaira   +8 more
core   +2 more sources