Results 91 to 100 of about 31,794 (223)

Results of 1987 MSS helicopter propagation experiment at UHF and L band in Central Maryland [PDF]

This effort emphasizes several important results pertaining to a mobile satellite system propagation experiment performed in Central Maryland during June 1987.
Goldhirsh, Julius, Vogel, Wolfhard J.
core   +1 more source

Magnetic Properties of Ab initio Model for Iron-Based Superconductors LaFeAsO

, 2010
By using variational Monte Carlo method, we examine an effective low-energy model for LaFeAsO derived from an ab initio downfolding scheme. We show that quantum and many-body fluctuations near a quantum critical point largely reduce the antiferromagnetic
Aichhorn M., Aichhorn M., Anisimov V. I., Aryasetiawan F., Bao W., Cao C., Craco L., Dai J., de la Cruz C., de la Cruz C., Hansmann P., Haule K., Huang Q., Imai Y., Ishibashi S., Ishida H., Kamihara Y., Koga A., Kuroki K., Li S., Luetkens H., Ma F., Ma F., Marzari and D N., Mazin I. I., Miyake T., Mizusaki T., Nakamura K., Nakamura K., Qureshi N., Ran Y., Richard P., Si Q., Sorella S., Subedi A., Tahara D., Wang C.   +36 more
core   +1 more source

Symmetry breaking and quantum correlations in finite systems: Studies of quantum dots and ultracold Bose gases and related nuclear and chemical methods

, 2007
Investigations of emergent symmetry breaking phenomena occurring in small finite-size systems are reviewed, with a focus on the strongly correlated regime of electrons in two-dimensional semicoductor quantum dots and trapped ultracold bosonic atoms in ...
Anderson P W, Anderson P W, Anisimovas E, Baranov M, Bednarek S, Bertsch G F, Bertsch G F, Bohigas O, Bohr Å, Bolton F, Born M, Burkard G, Carbó R, Ciorga M, Constantine Yannouleas, Creffield C E, Creffield C E, Creffield C E, Dai Z, Darwin C G, De Giovannini U, De Giovannini U Cavaliere F Cenni R Sassetti M Kramer B, Eric Yang S-R, Ghosal A, Girardeau M D, Gurvitz S A, Güçlü A D, Harju A, Harting J, Hirose K, Hurley A C, Jacak L, Jain J K, Jain J K, Jeon G S, Jeon G S, Kawamura T, Klironomos A D, Kouwenhoven L P, Laughlin R B, Lee I H, Lehoucq R B, Leopold J G, Li Y Yannouleas C Landman U, Lipparini E, Lozovik Yu E, Lozovik Yu E, MacDonald A H, Maksym P A, Nilsson S G, Nishi Y, Ohno K, Pais A, Pauncz R, Pederiva F, Peierls R E, Pethick C J, Pitaevskii L P, Reimann S M, Reimann S M, Reusch B, Ring P, Romanovsky I A, Rontani M, Rontani M, Ruan W Y, Ruder H, Shi C, Sommerfeld A, Szabo A, Taut M, Thouless D J, Toreblad M, Uzi Landman, Van Vleck J H, Wigner E P, Wunsch B Stauber T Guinea F, Yannouleas C, Yannouleas C, Yannouleas C, Yoshioka D   +80 more
core   +1 more source

Accuracy of density functionals for molecular electronics: the Anderson junction

, 2012
The exact ground-state exchange-correlation functional of Kohn-Sham density functional theory yields the exact transmission through an Anderson junction at zero bias and temperature. The exact impurity charge susceptibility is used to construct the exact
A. C. Hewson, Charles A. Stafford, Justin P. Bergfield, Kieron Burke, Zhen-Fei Liu   +4 more
core   +1 more source

Broadband Compact Quasi Yagi Antenna for UHF Wireless Communication Systems with Enhanced Performance at UHF ISM Bands [PDF]

Radioengineering, 2020
In this study, a broadband planar quasi Yagi antenna operated at ultra-high frequency (UHF) band is presented. The performance of the antenna is particularly improved for two popular UHF frequencies of 433 and 868 MHz used in several wireless ...
Y. Bakirli, A. Selek, M. Secmen
doaj  

Hartree-Fock symmetry breaking around conical intersections

, 2018
We study the behavior of Hartree-Fock (HF) solutions in the vicinity of conical intersections. These are here understood as regions of a molecular potential energy surface characterized by degenerate or nearly-degenerate eigenfunctions with identical ...
Henderson, Thomas M., Jake, Lena C., Scuseria, Gustavo E.   +2 more
core   +1 more source

Spatial Identification Methods and Systems for RFID Tags [PDF]

, 2013
Disertační práce je zaměřena na metody a systémy pro měření vzdálenosti a lokalizaci RFID tagů pracujících v pásmu UHF. Úvod je věnován popisu současného stavu vědeckého poznání v oblasti RFID prostorové identifikace a stručnému shrnutí problematiky ...
Povalač, Aleš
core  

A Planar Dual-Band UHF RFID Tag for Metallic Items [PDF]

Radioengineering, 2020
In this paper, a comparison of three tags based on modified patches for UHF RFID in term of size and read range performance is proposed. The antenna structure consists of a patch with an open stub and meander line for feed.
H. Bouazza, A. Lazaro, M. Bouya, A. Hadjoudja   +3 more
doaj  

Gravitationally Lensed HI with MeerKAT

, 2017
The SKA era is set to revolutionize our understanding of neutral hydrogen (HI) in individual galaxies out to redshifts of z~0.8; and in the z > 6 intergalactic medium through the detection and imaging of cosmic reionization.
Deane, Roger, Heywood, Ian, Obreschkow, Danail   +2 more
core   +1 more source

Ultra-high-frequency piecewise-linear chaos using delayed feedback loops

, 2012
We report on an ultra-high-frequency (> 1 GHz), piecewise-linear chaotic system designed from low-cost, commercially available electronic components.
Chua L. O., Damien Rontani, Daniel J. Gauthier, Seth D. Cohen   +3 more
core   +1 more source