Results 31 to 40 of about 202,952 (194)

Toroidal Spectral Drawing

Axioms, 2022
We give a deterministic drawing algorithm to draw a graph onto a torus, which is based on the usual spectral drawing algorithm. For most of the well-known toroidal vertex-transitive graphs, the result drawings give an embedding of the graphs onto the ...
Ming-Hsuan Kang, Jing-Wen Gu
doaj   +1 more source

LABORATORY TESTS OF A FOUR-SECTION SEED WHEEL WITH GROOVES IN THE SHAPE OF A PART OF THE ROTATION SURFACE OF A TORUS [PDF]

Volga Region Farmland, 2020
The article deals with the issue of improving the quality indicator of sowing cereal seeds, such as instability of total sowing and the results of laboratory research of experimental sowing machine, the reel of which is made four-sectional, with grooves ...
N.P. Laryushin, А.V. Shukov, А.N. Kalabushev, T.A. Kiryukhina   +3 more
doaj   +1 more source

Juvenile Cosmology; Or Richard Powers’ Post-Global Doughnut

Transatlantica, 2010
Richard Powers’ novel Operation Wandering Soul (1993) enacts the canny link between an already jaded and out-dated globalism and the child as an ascendant category.
Judith Roof
doaj   +1 more source

Exotic torus manifolds and equivariant smooth structures on quasitoric manifolds

, 2012
In 2006 Masuda and Suh asked if two compact non-singular toric varieties having isomorphic cohomology rings are homeomorphic. In the first part of this paper we discuss this question for topological generalizations of toric varieties, so-called torus ...
A. Fomenko, D. Epstein, D.J. Crowley, F. Johnson, G.M. Ziegler, G.W. Schwarz, K. Jänich, M. Davis, M. Masuda, M. Wiemeler, M.W. Davis, Michael Wiemeler, P. Melvin, P. Orlik, P. Orlik, R. Edwards, R. Kirby, W. Hsiang   +17 more
core   +1 more source

On the development of the Papaloizou-Pringle instability of the black hole-torus systems and quasi-periodic oscillations

, 2013
We present the numerical study of dynamical instability of a pressure-supported relativistic torus, rotating around the black hole with a constant specific angular momentum on a fixed space-time background, in case of perturbation by a matter coming from
Donmez, Orhan
core   +1 more source

AGN dust tori at low and high luminosities

, 2007
A cornerstone of AGN unification schemes is the presence of an optically and geometrically thick dust torus. It provides the obscuration to explain the difference between type 1 and type 2 AGN. We investigate the influence of the dust distribution on the
Akylas, Antonucci, Barger, Barvainis, Barvainis, Beckert, Dopita, Elitzur, Elvis, Emmering, Granato, Güsten, Horst, Hönig, Jaffe, Kaspi, Kishimoto, Krolik, Krolik, La Franca, Lawrence, Lutz, Mathis, McLure, Natta, Ohsuga, Pelletier, Perola, Pier, Polletta, S. F. Hönig, Sanders, Schartmann, Semenov, Simpson, Sitko, Spitzer, Suganuma, T. Beckert, Ueda, Vollmer, Wada, Weigelt, Wilkes, Woo   +44 more
core   +1 more source

Direct evidence of the receding `torus' around central nuclei of powerful radio sources [PDF]

, 2004
The presence of obscuring material (or a dusty `torus') in active galactic nuclei (AGN) is central to the unification model for AGN. Two models, the multi-population model for radio sources and the receding torus model, are capable of describing ...
Allen, Antonucci, Arshakian, Barthel, Bondi, Brunetti, Brunetti, Canalizo, Cao, Capetti, Chandrasekhar, Fanaroff, Freudling, Garrington, Grimes, Haas, Hardcastle, Hes, Hill, Jaffe, Kulkarni, Laing, Laing, Lawrence, McLure, Meisenheimer, Miller, Minezaki, Rawlings, Saikia, Siebenmorgen, Simpson, Simpson, T. G. Arshakian, Ueno, Verdoes Kleijn, Vermeulen, Willott, Willott   +38 more
core   +1 more source

Cooling timescale of dust tori in dying active galactic nuclei

, 2017
We estimate the dust torus cooling timescale once the active galactic nucleus (AGN) is quenched. In a clumpy torus system, once the incoming photons are suppressed, the cooling timescale of one clump from $T_{\rm dust}=1000$ K to several $10$ K is less ...
Ichikawa, Kohei, Tazaki, Ryo
core   +1 more source

Performance Enhancement of the Polarimetric Fibre Optical Current Sensor at JET Using Polarisation Optimisation

Sensors
To achieve optimal operation of the polarimetry-based FOCS, the light polarisation state at the input of the sensing fibre part must be close to a linear one. In the case of a FOCS deployed on a tokamak, the Joint European Torus (JET) in the present work,
Andrei Gusarov, Perry Beaumont, Paula Siren, JET Contributors   +3 more
doaj   +1 more source

TORUS HYSTERESIS

Radio Physics and Radio Astronomy, 2014
Theoretical studies of the dynamics of a nonlinear oscillator with cubic and quadratic nonlinearities simultaneously excited by low- and high-frequency external forcing are presented. A new mechanism of the appearance of bistability and hysteresis due to
D. M. Vavriv, A. Yu. Nimets
doaj   +1 more source