Energy Technology Data Exchange (ETDEWEB)
Cobble, James Allen [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2016-06-09
This document summarizes the Bumpy Torus Experiment as a viable fusion reactor concept. Conclusions reached include the following: In 30 years, order-of-magnitude technological advances have occurred in multiple areas of plasma heating and confinement. The ORNL bumpy torus of the 1970s was technology limited. Now that ITER is technology limited, an alternate concept is needed. A device built on such a concept should be current free, CW, modular, have a gentle shutdown, and demonstrable stability. The bumpy torus meets or has the potential to meet all of these criteria. Earlier, stability was not possible due to power limits; it has not been fully tested. It is time to revisit the bumpy-torus concept with a modest new machine.
Energy Technology Data Exchange (ETDEWEB)
Dory, R.A.; Uckan, N.A.; Ard, W.B.; Batchelor, D.B.; Berry, L.A.; Bryan, W.E.; Dandl, R.A.; Guest, G.E.; Haste, G.R.; Hastings, D.E.
1986-10-01
The ELMO Bumpy Square (EBS) concept consists of four straight magnetic mirror arrays linked by four high-field corner coils. Extensive calculations show that this configuration offers major improvements over the ELMO Bumpy Torus (EBT) in particle confinement, heating, transport, ring production, and stability. The components of the EBT device at Oak Ridge National Laboratory can be reconfigured into a square arrangement having straight sides composed of EBT coils, with new microwave cavities and high-field corners designed and built for this application. The elimination of neoclassical convection, identified as the dominant mechanism for the limited confinement in EBT, will give the EBS device substantially improved confinement and the flexibility to explore the concepts that produce this improvement. The primary goals of the EBS program are twofold: first, to improve the physics of confinement in toroidal systems by developing the concepts of plasma stabilization using the effects of energetic electrons and confinement optimization using magnetic field shaping and electrostatic potential control to limit particle drift, and second, to develop bumpy toroid devices as attractive candidates for fusion reactors. This report presents a brief review of the physics analyses that support the EBS concept, discussions of the design and expected performance of the EBS device, a description of the EBS experimental program, and a review of the reactor potential of bumpy toroid configurations. Detailed information is presented in the appendices.
Jensen, T. H.; Chu, M. S.
1981-06-01
The 'bumpy Z-pinch' is a magnetic configuration with potential usefulness for fusion reactors. A conceptually simple version of the configuration is axisymmetric. It contains regions of closed and open field lines. In the region of closed field lines, the field line topology is much like that of a tokamak; these regions link the region of open field lines around the axis of symmetry. Assuming that the plasma spontaneously maintains an equilibrium as described by Taylor (1974), it is possible to maintain indefinitely the regions of closed field lines by driving an axial current through the plasma in the region of open field lines. The ratio between the total axial driven current and the total poloidal current in each of the tokamak-like regions can, in principle, be made arbitrarily small, which means that the load impedance can be arbitrarily large. In addition, the configuration has the inherent virtue similar to that of the spheromak that the tokamak-like part of the plasma does not link any material coils.
Reactor assessments of advanced bumpy torus configurations
Energy Technology Data Exchange (ETDEWEB)
Uckan, N.A.; Owen, L.W.; Spong, D.A.; Miller, R.L.; Ard, W.B.; Pipkins, J.F.; Schmitt, R.J.
1983-01-01
Recently, several configurational approaches and concept improvement schemes were introduced for enhancing the performance of the basic ELMO Bumpy Torus (EBT) concept and for improving its reactor potential. These configurations include planar racetrack and square geometries, Andreoletti coil systems, and bumpy torus-stellarator hybrids (which include twisted racetrack and helical axis stellarator-snakey torus). Preliminary evaluations of reactor implications of each of these configurations have been carried out based on magnetics (vacuum) calculations, transport and scaling relationships, and stability properties. Results indicate favorable reactor projections with a significant reduction in reactor physical size as compared to conventional EBT reactor designs carried out in the past.
An improved description method of the bumpy texture
Institute of Scientific and Technical Information of China (English)
GAO RongHua; KONG DeHui; YIN BaoCai
2009-01-01
Bump mapping is a texture-based rendering approach for simulating surface details to make its illumination results have three-dimensional effects.The bumpy properties of an object are determined by height maps.But in the process of generating height maps,a problem arises,i.e.to get a correct value of the pixel height,empirical data should he calculated repeatedly,which proves very complicated,and meanwhile the realistic rendering effect is reduced,because the bumpy property is exaggerated in the height map.Therefore,in this paper,we present a method for describing the details of the bumpy texture,where a new concept "bumpy map" is Introduced to replace the height map.Experimental results demonstrate that the bumpy details produced by the "bumpy map" are more consistent with the original bumpy texture than by the method of height map.
Electrostatic confinement in a bumpy torus
Energy Technology Data Exchange (ETDEWEB)
El Nadi, A.M.
1984-11-01
In a closed-field-line device such as a bumpy torus, the combined E x B and del B drifts lead to charge separation that is balanced by the ion polarization drift. In this work, we determine self-consistent potential and density profiles and the condition for electric island formation.
Resistive Drift Waves in a Bumpy Torus
Energy Technology Data Exchange (ETDEWEB)
J.L.V. Lewandowski
2004-01-12
A computational study of resistive drift waves in the edge plasma of a bumpy torus is presented. The magnetohydrodynamic equilibrium is obtained from a three-dimensional local equilibrium model. The use of a local magnetohydrodynamic equilibrium model allows for a computationally efficient systematic study of the impact of the magnetic field structure on drift wave stability.
Reactor assessments of advanced bumpy torus configurations
Energy Technology Data Exchange (ETDEWEB)
Uckan, N.A.; Owen, L.W.; Spong, D.A.; Miller, R.L.; Ard, W.B.; Pipkins, J.F.; Schmitt, R.J.
1984-02-01
Recently, several innovative approaches were introduced for enhancing the performance of the basic ELMO Bumpy Torus (EBT) concept and for improving its reactor potential. These include planar racetrack and square geometries, Andreoletti coil systems, and bumpy torus-stellarator hybrids (which include twisted racetrack and helical axis stellarator - snakey torus). Preliminary evaluations of reactor implications of each approach have been carried out based on magnetics (vacuum) calculations, transport and scaling relationships, and stability properties deduced from provisional configurations that implement the approach but are not necessarily optimized. Further optimization is needed in all cases to evaluate the full potential of each approach. Results of these studies indicate favorable reactor projections with a significant reduction in reactor physical size as compared to conventional EBT reactor designs carried out in the past.
Discrete Element study of granular material - Bumpy wall interface behavior
El Cheikh, Khadija; Rémond, Sébastien; Pizette, Patrick; Vanhove, Yannick; Djelal, Chafika
2016-09-01
This paper presents a DEM study of a confined granular material sheared between two parallel bumpy walls. The granular material consists of packed dry spherical particles. The bumpiness is modeled by spheres of a given diameter glued on horizontal planes. Different bumpy surfaces are modeled by varying diameter or concentration of glued spheres. The material is sheared by moving the two bumpy walls at fixed velocity. During shear, the confining pressure applied on each bumpy wall is controlled. The effect of wall bumpiness on the effective friction coefficient and on the granular material behavior at the bumpy walls is reported for various shearing conditions. For given bumpiness and confining pressure that we have studied, it is found that the shear velocity does not affect the shear stress. However, the effective friction coefficient and the behavior of the granular material depend on the bumpiness. When the diameter of the glued spheres is larger than about the average grains diameter of the medium, the latter is uniformly sheared and the effective friction coefficient remains constant. For smaller diameters of the glued spheres, the effective friction coefficient increases with the diameter of glued spheres. The influence of glued spheres concentration is significant only for small glued spheres diameters, typically half of average particle diameter of the granular material. In this case, increasing the concentration of glued spheres leads to a decrease in effective friction coefficient and to shear localization at the interface. For different diameters and concentrations of glued spheres, we show that the effect of bumpiness on the effective friction coefficient can be characterized by the depth of interlocking.
On Embeddings of Tori in Euclidean Spaces
Institute of Scientific and Technical Information of China (English)
Matija CENCELJ; Du(s)an REPOV(S)
2005-01-01
Using the relation between the set of embeddings of tori into Euclidean spaces modulo ambient isotopies and the homotopy groups of Stiefel manifolds, we prove new results on embeddings of tori into Euclidean spaces.
van der Wolk, G.; Barthel, P. D.; Peletier, R. F.; Pel, J. W.
2010-01-01
Aims: We investigate the quasar - radio galaxy unification scenario and detect dust tori within radio galaxies of various types. Methods: Using VISIR on the VLT, we acquired sub-arcsecond (~0.40 arcsec) resolution N-band images, at a wavelength of 11.85 μm, of the nuclei of a sample of 27 radio gala
Sibeyn, J.; Rao, P; Juurlink, B.
1996-01-01
Algorithms for performing gossiping on one- and higher dimensional meshes are presented. As a routing model, we assume the practically important worm-hole routing. For one-dimensional arrays and rings, we give a novel lower bound and an asymptotically optimal gossiping algorithm for all choices of the parameters involved. For two-dimensional meshes and tori, several simple algorithms composed of one-dimensional phases are presented. For an important range of packet and mesh sizes it gives cle...
Tori Hobune 2011 & Eesti Hobune 2011 / Krista Sepp
Sepp, Krista
2011-01-01
14. mail korraldas Tori Hobusekasvanduse ratsaspordiklubi XVI Tori hobuse päeva ja esimese ettapi karikasarjas Tori Hobune 2011, kus avastardi takistussõidus tegid ka eesti tõugu hobused, ning 15. mail toimus koolisõidu etapp
van der Wolk, G; Peletier, R F; Pel, J W
2009-01-01
We investigate the validity of the quasar - radio galaxy unification scenario and determine the presence of dust tori among radio galaxies of various types. Actively accreting supermassive black holes in the centres of radio galaxies may be uncovered through their dust tori reradiating the optical and ultraviolet continuum in mid-infrared bands. Using VISIR on the VLT, we have obtained sub-arcsecond (~0.40") resolution N-band images, at a wavelength of 11.85 micron, of the nuclei of a sample of 27 radio galaxies of four types in the redshift range z=0.006-0.156. The sample consists of 8 edge-darkened, low-power Fanaroff-Riley class I (FR-I) radio galaxies, 6 edge-brightened, class II (FR-II) radio galaxies displaying low-excitation optical emission, 7 FR-IIs displaying high-excitation optical emission, and 6 FR-II broad emission line radio galaxies. Out of the sample of 27 objects, 10 nuclei are detected and several have constraining non-detections at 10 sigma sensitivities of 7 mJy. On the basis of the core ...
Quasi-periodic oscillations of perturbed tori
Parthasarathy, Varadarajan; Kluzniak, Wlodek
2015-01-01
We performed axisymmetric hydrodynamic simulations of perturbed tori orbiting a black hole. The tori in equilibrium were constructed with a constant distribution of angular momentum in a pseudo-Newtonian potential (Klu{\\'z}niak-Lee). Epicyclic motions were triggered by adding sub-sonic velocity fields: radial, vertical and diagonal to the tori in equilibrium. As the perturbed tori evolved in time, we measured $L_{2}$ norm of density and obtained the power spectrum of $L_{2}$ norm which manifested eigenfrequencies of tori modes. We observe a pair of modes which occur in an approximate 3:2 ratio. Results from our simulations are relevant in the context of high-frequency quasi-periodic oscillations (HF QPOs) observed in stellar-mass black hole binaries.
Directory of Open Access Journals (Sweden)
Ferry Kwakkel
2011-12-01
Full Text Available Given a closed Riemannian manifold (M, g, i.e. compact and boundaryless, there is a partition of its tangent bundle TM = ∪iΣi called the focal decomposition of TM. The sets Σi are closely associated to focusing of geodesics of (M, g, i.e. to the situation where there are exactly i geodesic arcs of the same length joining points p and q in M. In this note, we study the topological structure of the focal decomposition of a closed Riemannian manifold and its relation with the metric structure of the manifold. Our main result is that flat n-tori, n > 2, are focally rigid in the sense that if two flat tori are focally equivalent then the tori are isometric up to rescaling. The case n = 2 was considered before by F. Kwakkel.Dada uma variedade Riemanniana (M, g fechada, isto é, compacta e sem bordo, existe uma partição de seu fibrado tangente TM = ∪iΣi chamada decomposição focal de TM. Os conjuntos Σi estão intimamente associados ao modo como focalizam as geodésicas de (M,g, isto é, à situação em que existem exatamente i arcos de geodésica de mesmo comprimento unindo pontos p e q em M. Nesta nota, estudamos a estrutura topológica da decomposição focal de uma variedade Riemanniana fechada e sua relação com a estrutura métrica de M. Nosso principal resultado é que n-toros planos, n > 2, são focalmente rigidos, isto é, se dois toros planos são focalmente equivalentes, então os dois toros são isométricos módulo mudança de escala. O caso n = 2 foi considerado anteriormente por F. Kwakkel.
Matrix theory compactifications on twisted tori
Chatzistavrakidis, Athanasios
2012-01-01
We study compactifications of Matrix theory on twisted tori and non-commutative versions of them. As a first step, we review the construction of multidimensional twisted tori realized as nilmanifolds based on certain nilpotent Lie algebras. Subsequently, matrix compactifications on tori are revisited and the previously known results are supplemented with a background of a non-commutative torus with non-constant non-commutativity and an underlying non-associative structure on its phase space. Next we turn our attention to 3- and 6-dimensional twisted tori and we describe consistent backgrounds of Matrix theory on them by stating and solving the conditions which describe the corresponding compactification. Both commutative and non-commutative solutions are found in all cases. Finally, we comment on the correspondence among the obtained solutions and flux compactifications of 11-dimensional supergravity, as well as on relations among themselves, such as Seiberg-Witten maps and T-duality.
Nonlinear Dynamic Analysis of the Whole Vehicle on Bumpy Road
Institute of Scientific and Technical Information of China (English)
王威; 李瑰贤; 宋玉玲
2010-01-01
Through the research into the characteristics of 7-DoF high dimensional nonlinear dynamics of a vehicle on bumpy road, the periodic movement and chaotic behavior of the vehicle were found.The methods of nonlinear frequency response analysis, global bifurcation, frequency chart and Poincaré maps were used simultaneously to derive strange super chaotic attractor.According to Lyapunov exponents calculated by Gram-Schmidt method, the unstable region was compartmentalized and the super chaotic characteristic of ...
Cascade of period doublings of tori
Arneodo, A.; Coullet, P. H.; Spiegel, E. A.
1983-02-01
A three-dimensional map is proposed to model the effects of periodic forcing on a system displaying a transition to chaos through a cascade of period-doubling bifurcations. The study outlined here raises the problem of the existence and bifurcation of invariant tori. A principal feature of the simulations of both the differential equations and the discrete dynamical systems is that it is possible to disrupt period-doubling sequences (and inverse sequences as well) by periodic external forcing. Even though the way in which this abortion works is not understood, the mechanism is thought to be associated with the destruction of tori (Aronson et al., 1982) when the system is on the verge of bifurcation. The simulations therefore suggest that in moving farther along the cascade, the tori become more fragile. It is suspected that for arbitrarily weak driving, the cascade will eventually be disrupted after the cascade has proceeded through a sufficient number of steps.
Gravitational microlensing of AGN dusty tori
Stalevski, Marko; Popovic, Luka C; Baes, Maarten
2012-01-01
We investigated gravitational microlensing of AGN dusty tori in the case of lensed quasars in the infrared domain. The dusty torus is modeled as a clumpy two-phase medium. To obtain spectral energy distributions and images of tori at different wavelengths, we used the 3D Monte Carlo radiative transfer code SKIRT. A ray-shooting technique has been used to calculate microlensing magnification maps. We simulated microlensing by the stars in the lens galaxy for different configurations of the lensed system and different values of the torus parameters, in order to estimate (a) amplitudes and timescales of high magnification events, and (b) the influence of geometrical and physical properties of dusty tori on light curves in the infrared domain. We found that, despite their large size, dusty tori could be significantly affected by microlensing in some cases, especially in the near-infrared domain (rest-frame). The very long timescales of such events, in the range from several decades to hundreds of years, are limit...
Liouville quantum gravity on complex tori
David, François; Rhodes, Rémi; Vargas, Vincent
2016-02-01
In this paper, we construct Liouville Quantum Field Theory (LQFT) on the toroidal topology in the spirit of the 1981 seminal work by Polyakov [Phys. Lett. B 103, 207 (1981)]. Our approach follows the construction carried out by the authors together with Kupiainen in the case of the Riemann sphere ["Liouville quantum gravity on the Riemann sphere," e-print arXiv:1410.7318]. The difference is here that the moduli space for complex tori is non-trivial. Modular properties of LQFT are thus investigated. This allows us to integrate the LQFT on complex tori over the moduli space, to compute the law of the random Liouville modulus, therefore recovering (and extending) formulae obtained by physicists, and make conjectures about the relationship with random planar maps of genus one, eventually weighted by a conformal field theory and conformally embedded onto the torus.
Liouville quantum gravity on complex tori
Energy Technology Data Exchange (ETDEWEB)
David, François [Institut de Physique Théorique, CNRS, URA 2306, CEA, IPhT, Gif-sur-Yvette (France); Rhodes, Rémi [Université Paris-Est Marne la Vallée, LAMA, Champs sur Marne (France); Vargas, Vincent [ENS Paris, DMA, 45 rue d’Ulm, 75005 Paris (France)
2016-02-15
In this paper, we construct Liouville Quantum Field Theory (LQFT) on the toroidal topology in the spirit of the 1981 seminal work by Polyakov [Phys. Lett. B 103, 207 (1981)]. Our approach follows the construction carried out by the authors together with Kupiainen in the case of the Riemann sphere [“Liouville quantum gravity on the Riemann sphere,” e-print arXiv:1410.7318]. The difference is here that the moduli space for complex tori is non-trivial. Modular properties of LQFT are thus investigated. This allows us to integrate the LQFT on complex tori over the moduli space, to compute the law of the random Liouville modulus, therefore recovering (and extending) formulae obtained by physicists, and make conjectures about the relationship with random planar maps of genus one, eventually weighted by a conformal field theory and conformally embedded onto the torus.
Algebraic treatment of compactification on noncommutative tori
Casalbuoni, R.
1998-07-01
In this paper we study the compactification conditions of the M theory on D-dimensional noncommutative tori. The main tool used for this analysis is the algebra A(ZD) of the projective representations of the abelian group ZD. We exhibit the explicit solutions in the space of the multiplication algebra of A(ZD), that is the algebra generated by right and left multiplications.
Exploring potential Pluto-generated neutral tori
Smith, Howard T.; Hill, Matthew; KollMann, Peter; McHutt, Ralph
2015-11-01
The NASA New Horizons mission to Pluto is providing unprecedented insight into this mysterious outer solar system body. Escaping molecular nitrogen is of particular interest and possibly analogous to similar features observed at moons of Saturn and Jupiter. Such escaping N2 has the potential of creating molecular nitrogen and N (as a result of molecular dissociation) tori or partial toroidal extended particle distributions. The presence of these features would present the first confirmation of an extended toroidal neutral feature on a planetary scale in our solar system. While escape velocities are anticipated to be lower than those at Enceladus, Io or even Europa, particle lifetimes are much longer in Pluto’s orbit because as a result of much weaker solar interaction processes along Pluto’s orbit (on the order of tens of years). Thus, with a ~248 year orbit, Pluto may in fact be generating an extended toroidal feature along it orbit.For this work, we modify and apply our 3-D Monte Carlo neutral torus model (previously used at Saturn, Jupiter and Mercury) to study/analyze the theoretical possibility and scope of potential Pluto-generated neutral tori. Our model injects weighted particles and tracks their trajectories under the influence of all gravitational fields with interactions with other particles, solar photons and Pluto collisions. We present anticipated N2 and N tori based on current estimates of source characterization and environmental conditions. We also present an analysis of sensitivity to assumed initial conditions. Such results can provide insight into the Pluto system as well as valuable interpretation of New Horizon’s observational data.
A Hamiltonian KAM theorem for bundles of Lagrangean tori
Broer, HW; Cushman, RH; Fasso, F; Dumortier, F; Broer, H; Mawhin, J; Vanderbauwhede, A; Lunel, SV
2005-01-01
The classical KAM theorem deals with Lagrangean invariant tori in nearly integrable Hamiltonian systems. The stability formulation of the KAM theorem states that, when restricting to a large measure Diophantine "Cantor set" of such tori, the integrable approximation is smoothly conjugate to the near
Curved noncommutative tori as Leibniz quantum compact metric spaces
Energy Technology Data Exchange (ETDEWEB)
Latrémolière, Frédéric, E-mail: frederic@math.du.edu [Department of Mathematics, University of Denver, Denver, Colorado 80208 (United States)
2015-12-15
We prove that curved noncommutative tori are Leibniz quantum compact metric spaces and that they form a continuous family over the group of invertible matrices with entries in the image of the quantum tori for the conjugation by modular conjugation operator in the regular representation, when this group is endowed with a natural length function.
Curved noncommutative tori as Leibniz quantum compact metric spaces
Latrémolière, Frédéric
2015-12-01
We prove that curved noncommutative tori are Leibniz quantum compact metric spaces and that they form a continuous family over the group of invertible matrices with entries in the image of the quantum tori for the conjugation by modular conjugation operator in the regular representation, when this group is endowed with a natural length function.
Scattering Matrices and Conductances of Leaky Tori
Pnueli, A.
1994-04-01
Leaky tori are two-dimensional surfaces that extend to infinity but which have finite area. It is a tempting idea to regard them as models of mesoscopic systems connected to very long leads. Because of this analogy-scattering matrices on leaky tori are potentially interesting, and indeed-the scattering matrix on one such object-"the" leaky torus-was studied by M. Gutzwiller, who showed that it has chaotic behavior. M. Antoine, A. Comtet and S. Ouvry generalized Gutzwiller‧s result by calculating the scattering matrix in the presence of a constant magnetic field B perpendicular to the surface. Motivated by these results-we generalize them further. We define scattering matrices for spinless electrons on a general leaky torus in the presence of a constant magnetic field "perpendicular" to the surface. From the properties of these matrices we show the following: (a) For integer values of B, Tij (the transition probability from cusp i to cusp j), and hence also the Büttiker conductances of the surfaces, are B-independent (this cannot be interpreted as a kind of Aharonov-Bohm effect since a magnetic force is acting on the electrons). (b) The Wigner time-delay is a monotonically increasing function of B.
Infrared Constrains on AGN Tori Models
Hatziminaoglou, E
2006-01-01
This work focuses on the properties of dusty tori in active galactic nuclei (AGN) derived from the comparison of SDSS type 1 quasars with mid-Infrared (MIR) counterparts and a new, detailed torus model. The infrared data were taken by the Spitzer Wide-area InfraRed Extragalactic (SWIRE) Survey. Basic model parameters are constraint, such as the density law of the graphite and silicate grains, the torus size and its opening angle. A whole variety of optical depths is supported. The favoured models are those with decreasing density with distance from the centre, while there is no clear tendency as to the covering factor, i.e. small, medium and large covering factors are almost equally distributed. Based on the models that better describe the observed SEDs, properties such as the accretion luminosity, the mass of dust, the inner to outer radius ratio and the hydrogen column density are computed. The properties of the tori, as derived fitting the observed SEDs, are independent of the redshift, once observational ...
Three-dimensional tori and Arnold tongues
Energy Technology Data Exchange (ETDEWEB)
Sekikawa, Munehisa, E-mail: sekikawa@cc.utsunomiya-u.ac.jp [Department of Mechanical and Intelligent Engineering, Utsunomiya University, Utsunomiya-shi 321-8585 (Japan); Inaba, Naohiko [Organization for the Strategic Coordination of Research and Intellectual Property, Meiji University, Kawasaki-shi 214-8571 (Japan); Kamiyama, Kyohei [Department of Electronics and Bioinformatics, Meiji University, Kawasaki-shi 214-8571 (Japan); Aihara, Kazuyuki [Institute of Industrial Science, the University of Tokyo, Meguro-ku 153-8505 (Japan)
2014-03-15
This study analyzes an Arnold resonance web, which includes complicated quasi-periodic bifurcations, by conducting a Lyapunov analysis for a coupled delayed logistic map. The map can exhibit a two-dimensional invariant torus (IT), which corresponds to a three-dimensional torus in vector fields. Numerous one-dimensional invariant closed curves (ICCs), which correspond to two-dimensional tori in vector fields, exist in a very complicated but reasonable manner inside an IT-generating region. Periodic solutions emerge at the intersections of two different thin ICC-generating regions, which we call ICC-Arnold tongues, because all three independent-frequency components of the IT become rational at the intersections. Additionally, we observe a significant bifurcation structure where conventional Arnold tongues transit to ICC-Arnold tongues through a Neimark-Sacker bifurcation in the neighborhood of a quasi-periodic Hopf bifurcation (or a quasi-periodic Neimark-Sacker bifurcation) boundary.
Modular Curvature for Noncommutative Two-Tori
Connes, Alain
2011-01-01
Starting from the description of the conformal geometry of noncommutative 2-tori in the framework of modular spectral triples, we explicitly compute the local curvature functionals determined by the value at zero of the zeta functions affiliated with these spectral triples. We give a closed formula for the Ray-Singer analytic torsion in terms of the Dirichlet quadratic form and the generating function for Bernoulli numbers applied to the modular operator. The gradient of the Ray-Singer analytic torsion is then expressed in terms of these functionals, and yields the analogue of scalar curvature. Computing this gradient in two ways elucidates the meaning of the complicated two variable functions occurring in the formula for the scalar curvature. Moreover, the corresponding evolution equation for the metric produces the appropriate analogue of Ricci curvature. We prove the analogue of the classical result which asserts that in every conformal class the maximum value of the determinant of the Laplacian on metrics...
Infrared Constraints on AGN Tori Models
Hatziminaoglou, E; Pérez-Fournon, I; Franceschini, A; Hernan-Caballero, A; Afonso-Luis, A; Lonsdale, C; Fang, F; Oliver, S; Rowan-Robinson, M; Shupe, D; Smith, H; Surace, J; Gonzales-Solares, E
2006-01-01
This work focuses on the properties of dusty tori in active galactic nuclei (AGN) derived from the comparison of SDSS type 1 quasars with mid-Infrared (MIR) counterparts and a new, detailed torus model. The infrared data were taken by the Spitzer Wide-area InfraRed Extragalactic (SWIRE) Survey. Basic model parameters are constraint, such as the density law of the graphite and silicate grains, the torus size and its opening angle. A whole variety of optical depths is supported. The favoured models are those with decreasing density with distance from the centre, while there is no clear tendency as to the covering factor, ie small, medium and large covering factors are almost equally distributed. Based on the models that better describe the observed SEDs, properties such as the accretion luminosity, the mass of dust, the inner to outer radius ratio and the hydrogen column density are computed.
On exact triangles consisting of stable vector bundles on tori
Kobayashi, Kazushi
2016-01-01
In this paper, we consider the exact triangles consisting of stable holomorphic vector bundles on one-dimensional complex tori, and discuss their relations with the corresponding Fukaya category via the homological mirror symmetry.
Time-independent gossiping on full-port tori
Meyer, U.; Sibeyn, J.
1998-01-01
Near-optimal gossiping algorithms are given for two- and higher dimensional tori. It is assumed that the amount of data each PU contributes is so large that start-up time may be neglected. For two-dimensional tori, a previous algorithm achieved optimality in an intricate way, with a time-dependent routing pattern. In all steps of our algorithms, the PUs forward the received packets in the same way.
Võitlus tori tõuraamatute pärast jätkub / Aive Sarjas
Sarjas, Aive
2012-01-01
Eesti Hobusekasvatajate Seltsi (EHS) kaebusest kohtule, et seoses Veterinaar- ja toiduameti otusega tunnustda Vana-Tori Hobuse Ühingut tori tõugu hobuste vana-tori suuna tõuraamatu pidajana ei saa EHS täita aretus- ja säilitusprogrammiga võetud kohustusi
Küsimuste tulv automaksu teel / Villem Tori
Tori, Villem
2008-01-01
Eesti Autoettevõtete Liidu direktor Villem Tori imestab sotsiaaldemokraatide automaksu idee üle, sest kordagi pole öeldud, mida sellest maksust laekuva rahaga teha soovitakse. Vt. samas: Võimalik automaks. Kommenteerivad võimlemisklubi Janika juht Janika Mölder ja suusatreener Mati Alaver
Line Emission from Optically Thick RelativisticAccretion Tori
Energy Technology Data Exchange (ETDEWEB)
Fuerst, Steven V.; /KIPAC, Menlo Park /Mullard Space Sci. Lab.; Wu, Kinwah; /Mullard Space Sci. Lab.
2007-09-14
We calculate line emission from relativistic accretion tori around Kerr black holes and investigate how the line profiles depend on the viewing inclination, spin of the central black hole, parameters describing the shape of the tori, and spatial distribution of line emissivity on the torus surface. We also compare the lines with those from thin accretion disks. Our calculations show that lines from tori and lines from thin disks share several common features. In particular, at low and moderate viewing inclination angles they both have asymmetric double-peaked profiles with a tall, sharp blue peak and a shorter red peak which has an extensive red wing. At high viewing inclination angles they both have very broad, asymmetric lines which can be roughly considered as single-peaked. Torus and disk lines may show very different red and blue line wings, but the differences are due to the models for relativistic tori and disks having differing inner boundary radii. Self-eclipse and lensing play some role in shaping the torus lines, but they are effective only at high inclination angles. If inner and outer radii of an accretion torus are the same as those of an accretion disk, their line profiles show substantial differences only when inclination angles are close to 90{sup o}, and those differences are manifested mostly at the central regions of the lines instead of the wings.
Geometry of KAM tori for nearly integrable Hamiltonian systems
Broer, Hendrik; Cushman, Richard; Fassò, Francesco; Takens, Floris
2007-01-01
We obtain a global version of the Hamiltonian KAM theorem for invariant Lagrangian tori by gluing together local KAM conjugacies with the help of a partition of unity. In this way we find a global Whitney smooth conjugacy between a nearly integrable system and an integrable one. This leads to the pr
So That History May Repeat Itself: Roger Tory Peterson Institute.
Sharp, William; Dobey, Dan
1991-01-01
Traces the roots of the Roger Tory Peterson Institute, which provides programs to encourage outdoor experiences. Summarizes a forum on natural history education titled, "Breaking the Barriers: Linking Children and Nature." Lists strategies for improving environmental education and objectives for the institute. (KS)
Perfect fluid tori orbiting Kehagias-Sfetsos naked singularities
Stuchlík, Z.; Pugliese, D.; Schee, J.; Kučáková, H.
2015-09-01
We construct perfect fluid tori in the field of the Kehagias-Sfetsos (K-S) naked singularities. These are spherically symmetric vacuum solutions of the modified Hořava quantum gravity, characterized by a dimensionless parameter ω M^2, combining the gravitational mass parameter M of the spacetime with the Hořava parameter ω reflecting the role of the quantum corrections. In dependence on the value of ω M^2, the K-S naked singularities demonstrate a variety of qualitatively different behavior of their circular geodesics that is fully reflected in the properties of the toroidal structures, demonstrating clear distinction to the properties of the torii in the Schwarzschild spacetimes. In all of the K-S naked singularity spacetimes the tori are located above an "antigravity" sphere where matter can stay in a stable equilibrium position, which is relevant for the stability of the orbiting fluid toroidal accretion structures. The signature of the K-S naked singularity is given by the properties of marginally stable tori orbiting with the uniform distribution of the specific angular momentum of the fluid, l= const. In the K-S naked singularity spacetimes with ω M^2 > 0.2811, doubled tori with the same l= const can exist; mass transfer between the outer torus and the inner one is possible under appropriate conditions, while only outflow to the outer space is allowed in complementary conditions. In the K-S spacetimes with ω M^2 < 0.2811, accretion from cusped perfect fluid tori is not possible due to the non-existence of unstable circular geodesics.
Perfect fluid tori orbiting Kehagias-Sfetsos naked singularities
Stuchlík, Zdeněk; Schee, Jan; Kučáková, Hana
2014-01-01
We construct perfect fluid tori in the field of the Kehagias-Sfetsos (K-S) naked singularity representing spherically symmetric vacuum solution of the modified Ho\\v{r}ava quantum gravity that is characterized by a dimensionless parameter $\\omega M^2$, combining the gravitational mass parameter $M$ of the spacetime with the Ho\\v{r}ava parameter $\\omega$ reflecting the role of the quantum corrections. In dependence on the value of $\\omega M^2$, the K-S naked singularities demonstrate a variety of qualitatively different behavior of their circular geodesics that is fully reflected in the properties of the toroidal structures. In all of the K-S naked singularity spacetimes the tori are located above an "antigravity" sphere where matter can stay in stable equilibrium position, that is relevant for the stability of the orbiting fluid toroidal accretion structures.
Mechanisms of Stochastic Diffusion of Energetic Ions in Spherical Tori
Energy Technology Data Exchange (ETDEWEB)
Ya.I. Kolesnichenko; R.B. White; Yu.V. Yakovenko
2001-01-18
Stochastic diffusion of the energetic ions in spherical tori is considered. The following issues are addressed: (I) Goldston-White-Boozer diffusion in a rippled field; (ii) cyclotron-resonance-induced diffusion caused by the ripple; (iii) effects of non-conservation of the magnetic moment in an axisymmetric field. It is found that the stochastic diffusion in spherical tori with a weak magnetic field has a number of peculiarities in comparison with conventional tokamaks; in particular, it is characterized by an increased role of mechanisms associated with non-conservation of the particle magnetic moment. It is concluded that in current experiments on National Spherical Torus eXperiment (NSTX) the stochastic diffusion does not have a considerable influence on the confinement of energetic ions.
Homological mirror symmetry on noncommutative two-tori
Kajiura, H
2004-01-01
Homological mirror symmetry is a conjecture that a category constructed in the A-model and a category constructed in the B-model are equivalent in some sense. We construct a cyclic differential graded (DG) category of holomorphic vector bundles on noncommutative two-tori as a category in the B-model side. We define the corresponding Fukaya's category in the A-model side, and prove the equivalence of the two categories at the level of cyclic categories. We further write down explicitly Feynman rules for higher Massey products derived from the cyclic DG category. As a background of these arguments, a physical explanation of the mirror symmetry for noncommutative two-tori is also given.
Classification of knotted tori in 2-metastable dimension
Cencelj, Matija
2012-11-30
This paper is devoted to the classical Knotting Problem: for a given manifold N and number m describe the set of isotopy classes of embeddings N → Sm. We study the specific case of knotted tori, that is, the embeddings Sp × Sq → Sm. The classification of knotted tori up to isotopy in the metastable dimension range m > p + 3 2 q + 2, p 6 q, was given by Haefliger, Zeeman and A. Skopenkov. We consider the dimensions below the metastable range and give an explicit criterion for the finiteness of this set of isotopy classes in the 2-metastable dimension: Theorem. Assume that p+ 4 3 q +2 < mp+ 3 2 q +2 and m > 2p+q +2. Then the set of isotopy classes of smooth embeddings Sp × Sq → Sm is infinite if and only if either q + 1 or p + q + 1 is divisible by 4. © 2012 RAS(DoM) and LMS.
Roth, J. R.; Gerdin, G. A.
1976-01-01
The toroidal ring of plasma contained in the NASA Lewis bumpy-torus superconducting magnet facility may be biased to positive or negative potentials approaching 50 kilovolts by applying direct-current voltages of the respective polarity to 12 or fewer of the midplane electrode rings. The electric fields which are responsible for heating the ions by E/B drift then point radially outward or inward. The low-frequency fluctuations below the ion cyclotron frequency appeared to be dominated by rotating spokes.
Influence of globalmagnetic perturbations on plasma behavior in Elmo Bumpy Torus
Energy Technology Data Exchange (ETDEWEB)
Quon, B.H.; Dandl, R.A.; Colestock, P.L.; :Bieniosek, F.M.; Ikegami, H.
1979-02-01
The sensitivity of plasma confinement to magnetic field error effects has been tested experimentally using externally introduced global field errors on the ELMO Bumpy Torus (EBT). Below a critical error field (deltaB/sub r//B)/sub cr/ of approx. = to 0.6-1 x 10/sup -3/ the plasma was observed to be essentially free from convective cells, toroidal currents, and instabilities. This observed critical value is comparable to a neoclassical critical field error (deltaB/sub r//B)/sub cr/ approx. = rho/R, the ratio of the ion Larmor radius to the major radius of the torus.
Numerical simulations of oscillating tori in a pseudo-Newtonian potential
Parthasarathy, Varadarajan; Kluzniak, Wlodek
2016-01-01
We have modeled hydrodynamical tori in the Klu{\\'z}niak-Lee pseudo-Newtonian potential. The tori in equilibrium were perturbed with uniform sub-sonic velocity fields: vertical, radial and diagonal respectively, and allowed to evolve in time. We identify the eigenmodes corresponding to those of slender tori. The results of our simulations are relevant to the investigation of high-frequency quasi-periodic oscillations observed in stellar-mass black hole binaries.
The Persistence of Invariant Tori in Nearly Small Twist Mappings with Intersection Property
Institute of Scientific and Technical Information of China (English)
祝文壮; 黄庆道; 刘柏枫
2004-01-01
In this paper we investigate the nearly small twist mappings with intersection property. With a certain non-degenerate condition, we proved that the most of invariant tori of the original small twist mappings will survive afer small perturtations. The persisted invariant tori are close to the unperturbed ones when the perturbation are small. The orbits reduced by those mappings are quasi-periodic in the invariant tori with the frequences closing to the original ones.
The Tomba dei Tori at Tarquinia: A ritual approach
Directory of Open Access Journals (Sweden)
J. Rasmus Brandt
2014-11-01
Full Text Available In a recent publication (Brandt 2014b an attempt was made to single out recurring pictorial motifs in Etruscan tomb paintings and to interpret them as elements of funerary ritual procedures with reference to Arnold van Gennep’s rites-de-passage model (1908 and Mary Douglas’ views on purity and danger (1996. The model is here applied on the Archaic and well-known Tomba dei Tori at Tarquinia in order to see if the tomb’s many enigmatic pictorial scenes can be read as coherent elements of such procedures.
Formation Flight of Earth Satellites on KAM Tori
2007-09-01
analysis in 320km, 30◦ orbit, δϕ = 0.0001◦ 119 E8 . Cluster distance from chief satellite for tight formation analysis in 320km, 30◦ orbit, δϕ0 = 0.0001...become all the more apparent with the relatively recent focus on development and implementation of small satellite or microsatellite formations – groups ...of math - ematics. However, one can obtain a very basic idea of system behavior by investigating higher-dimensional tori using a method loosely
Enhancement of the TORIS data base of Appalachian basin oil fields. Final report
Energy Technology Data Exchange (ETDEWEB)
NONE
1996-01-31
The Tertiary Oil Recovery Information System, or TORIS, was developed by the Department of Energy in the early 1980s with a goal of accounting for 70% of the nation`s original oil in place (OOIP). More than 3,700 oil reservoirs were included in TORIS, but coverage in the Appalachian basin was poor. This TORIS enhancement project has two main objectives: to increase the coverage of oil fields in the Appalachian basin; and to evaluate data for reservoirs currently in TORIS, and to add, change or delete data as necessary. Both of these objectives have been accomplished. The geological surveys in Kentucky, Ohio, Pennsylvania and West Virginia have identified 113 fields in the Appalachian basin to be included in TORIS that collectively contained 80% of the original oil in place in the basin. Furthermore, data in TORIS at the outset of the project was checked and additional data were added to the original 20 TORIS oil fields. This final report is organized into four main sections: reservoir selection; evaluation of data already in TORIS; industry assistance; and data base creation and validation. Throughout the report the terms pool and reservoir may be used in reference to a single zone of oil accumulation and production within a field. Thus, a field is composed of one or more pools at various stratigraphic levels. These pools or reservoirs also are referred to as pay sands that may be individually named sandstones within a formation or group.
Bifurcations of Invariant Tori and Subharmonic Solutions of Singularly Perturbed System
Institute of Scientific and Technical Information of China (English)
Zhiyong YE; Maoan HAN
2007-01-01
This paper deals with bifurcations of subharmonic solutions and invariant tori generated from limit cycles in the fast dynamics for a nonautonomous singularly perturbed integral manifold, the conditions for the existence of invariant tori are obtained, and the saddle-node bifurcations of subharmonic solutions are studied.
KAM Type-Theorem for Lower Dimensional Tori in Random Hamiltonian Systems*
Institute of Scientific and Technical Information of China (English)
LI YONG; XU LU
2011-01-01
In this paper, we study the persistence of lower dimensional tori for random Hamiltonian systems, which shows that majority of the unperturbed tori persist as Cantor fragments of lower dimensional ones under small perturbation. Using this result, we can describe the stability of the non-autonomous dynamic systems.
REGIMUL JURIDIC AL BILETULUI DE CĂLĂTORIE ELECTRONIC
Directory of Open Access Journals (Sweden)
Dumitriţa BAEŞU
2016-03-01
Full Text Available În articol sunt scoase în relief principalele repere conceptuale ce se ataşează problematicii cu privire la coraportul biletului de călătorie electronic în transportul auto de călători şi bagaje şi în transportul aerian. Este fundamentată teza, potrivit căreia sistemul de taxare electronic în cadrul prestării serviciilor de transport este deosebit de important şi necesar în contextul racordării legislaţiei naţionale la cerinţele Uniunii Europene. De asemenea, se menţionează că reforma în cazul respectiv este oportună şi inevitabilă, deoarece una dintre condiţiile cerute de Uniunea Europeană pentru integrarea Republicii Moldova în acest sistem constă în armonizarea legislaţiei privind transportul la standardele europene. Nu în ultimul rând, este formulată concluzia, potrivit căreia achiziţionarea biletelor de călătorie electronice a devenit mult mai comodă, economă şi accesibilă. LEGAL REGIME OF THE ELECTRONIC TRAVEL TICKET In the article are pointed out major conceptual aspects that are a added to issues on the ticket correlation of road transport of passengers electronic ticket and luggage in air transport. It is fundamental thesis that the electronic toll system in transport services is particularly important and necessary in the context of adjusting the national legislation to the European Union standards. Also in this case, is mentioned that reform is appropriate and inevitable, because one of the conditions required by the EU for Moldova's integration into the system is to harmonize transport legislation with European standards. Finally, as conclusion, electronic travel ticket purchasing has become more convenient, cheap and affordable.
Dynamical supersymmetry breaking on magnetized tori and orbifolds
Abe, Hiroyuki; Kobayashi, Tatsuo; Sumita, Keigo
2016-10-01
We construct several dynamical supersymmetry breaking (DSB) models within a single ten-dimensional supersymmetric Yang-Mills (SYM) theory, compactified on magnetized tori with or without orbifolding. We study the case that the supersymmetry breaking is triggered by a strong dynamics of SU (NC) SYM theory with NF flavors contained in the four-dimensional effective theory. We show several configurations of magnetic fluxes and orbifolds, those potentially yield, below the compactification scale, the field contents and couplings required for triggering DSB. We especially find a class of self-complete DSB models on orbifolds, where all the extra fields are eliminated by the orbifold projection and DSB successfully occurs within the given framework. Comments on some perspectives for associating the obtained DSB models with the other sectors, such as the visible sector and another hidden sector for, e.g., stabilizing moduli, are also given.
Dynamical supersymmetry breaking on magnetized tori and orbifolds
Abe, Hiroyuki; Sumita, Keigo
2016-01-01
We construct several dynamical supersymmetry breaking (DSB) models within a single ten-dimensional supersymmetric Yang-Mills (SYM) theory, compactified on magnetized tori with or without orbifolding. We study the case that the supersymmetry breaking is triggered by a strong dynamics of $SU(N_C)$ SYM theory with $N_F$ flavors contained in the four-dimensional effective theory. We show several configurations of magnetic fluxes and orbifolds, those potentially yield, below the compactification scale, the field contents and couplings required for triggering DSB. We especially find a class of self-complete DSB models on orbifolds, where all the extra fields are eliminated by the orbifold projection and DSB successfully occurs within the given framework. Comments on some perspectives for associating the obtained DSB models with the other sectors, such as the visible sector and another hidden sector for, e.g., stabilizing moduli, are also given.
Nonsymmetric systems arising in the computation of invariant tori
Energy Technology Data Exchange (ETDEWEB)
Trummer, M.R. [Simons Fraser Univ., Burnaby, British Columbia (Canada)
1996-12-31
We introduce two new spectral implementations for computing invariant tori. The underlying nonlinear partial differential equation although hyperbolic by nature, has periodic boundary conditions in both space and time. In our first approach we discretize the spatial variable, and find the solution via a shooting method. In our second approach, a full two-dimensional Fourier spectral discretization and Newton`s method lead to very large, sparse, nonsymmetric systems. These matrices are highly structured, but the sparsity pattern prohibits the use of direct solvers. A modified conjugate gradient type iterative solver appears to perform best for this type of problems. The two methods are applied to the van der Pol oscillator, and compared to previous algorithms. Several preconditioners are investigated.
Dynamical supersymmetry breaking on magnetized tori and orbifolds
Directory of Open Access Journals (Sweden)
Hiroyuki Abe
2016-10-01
Full Text Available We construct several dynamical supersymmetry breaking (DSB models within a single ten-dimensional supersymmetric Yang–Mills (SYM theory, compactified on magnetized tori with or without orbifolding. We study the case that the supersymmetry breaking is triggered by a strong dynamics of SU(NC SYM theory with NF flavors contained in the four-dimensional effective theory. We show several configurations of magnetic fluxes and orbifolds, those potentially yield, below the compactification scale, the field contents and couplings required for triggering DSB. We especially find a class of self-complete DSB models on orbifolds, where all the extra fields are eliminated by the orbifold projection and DSB successfully occurs within the given framework. Comments on some perspectives for associating the obtained DSB models with the other sectors, such as the visible sector and another hidden sector for, e.g., stabilizing moduli, are also given.
A vast amount of various invariant tori in the Nosé-Hoover oscillator
Energy Technology Data Exchange (ETDEWEB)
Wang, Lei [School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074 (China); Department of Mathematics and Physics, Hefei University, Hefei 230601 (China); Yang, Xiao-Song, E-mail: yangxs@hust.edu.cn [School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074 (China)
2015-12-15
This letter restudies the Nosé-Hoover oscillator. Some new averagely conservative regions are found, each of which is filled with different sequences of nested tori with various knot types. Especially, the dynamical behaviors near the border of “chaotic region” and conservative regions are studied showing that there exist more complicated and thinner invariant tori around the boundaries of conservative regions bounded by tori. Our results suggest an infinite number of island chains in a “chaotic sea” for the Nosé-Hoover oscillator.
Martin, Charles Francis James
The Ontario Tories' 42-year hegemony in government (1943-1985) was wrought through clever policies which often utilized Crown institutions to promote prosperity or to oblige or mollify vying interests. Ousted in 1985, though, they used their time in opposition to revise the Tory doctrine. In the 1995 election, the Tories emerged a tougher, more truculent group quite unlike their predecessors. Campaigning on their Common Sense Revolution (CSR) platform, they promised to eliminate red tape and vowed to obliterate all ostensible economic barriers which were impeding commerce in the province. In the CSR, the Tories identified Ontario Hydro (OH), the province's lauded publicly-owned power monopoly, as a troublesome and inefficient Crown entity which required fundamental reform. Portions of OH, they hinted, would likely be sold. Once elected, the Tories worked hurriedly to demolish OH and destroy public power in Ontario. For nearly 100 years, OH proved a pivotal component within the province's political economy for its provision of affordable, reliable power and its function as a policy tool to incite and direct development. A Tory government fought to instigate public power in the early 1900s and, in the late 1900s, a Tory government was fighting vigorously to rescind it. Why would they now renounce Crown power? It is the intent of this thesis to elucidate the Tory government's involvement in the transformation of Ontario's electricity industry from 1995 to 2003. Distinguishing electricity as a special, strategic staple, this thesis uses a pro-state, pro-staples industry political economy approach to discern how and why the Tory government sought to restructure the electricity sector. Essentially, it posits that the onslaught of neoliberalism, the emergence of novel generating technology, and the faltering of OH's nuclear wing all had a huge part to play in provoking the Tory government to initiate its reforms. Their reforms, though, proved too hasty, haughty, and
Institute of Scientific and Technical Information of China (English)
Liu Su-Hua; Tang Jia-Shi; Qin Jin-Qi; Yin Xiao-Bo
2008-01-01
Bifurcation characteristics of the Langford system in a general form are systematically analysed,and nonlinear controls of periodic solutions changing into invariant tori in this system are achieved.Analytical relationship between control gain and bifurcation parameter is obtained.Bifurcation diagrams are drawn,showing the results of control for secondary Hopf bifurcation and sequences of bifurcations route to chaos.Numerical simulations of quasi-periodic tori validate analytic predictions.
Reverberation Mapping of the Dusty Tori in Active Galactic Nuclei
Richmond, Michael; Batcheldor, Daniel; Buchanan, Catherine; Capetti, Alessandro; Moshe, Elitzur; Gallimore, Jack; Horne, Keith; Kishimoto, Makoto; Marconi, Alessandro; Mason, Rachel; Maiolino, Robert; Netzer, Hagai; Packham, Christopher; Perez, Enrique; Peterson, Brad; Tadhunter, Clive; Robinson, Andrew; Stirpe, Giovanna; Storchi-Bergmann, Thaisa
2012-12-01
Our current understanding of the size and structure of AGN tori is weak, despite their central role in AGN unification models and their importance for studies of supermassive black hole demographics. We propose to use the warm phase of Spitzer to determine the sizes of circum-nuclear dust tori in AGN. To accomplish this we will extend an existing Spitzer monitoring campaign, coordinated with ground-based observations, to measure the 'light echo' as the dust emission responds to variations in the AGN optical/UV continuum. We have selected a sample of 12 bright type 1 nuclei in close proximity to the Spitzer Continuous Viewing Zone which can be observed for at least 70% of the 365 day cycle. We will observe each AGN every 30 days for the whole of Cycle 9, roughly doubling our existing baseline of one year, permitting us to identify optical-IR time lags of many months. We will continue our current ground based monitoring program using a variety of telescopes to determine the AGN light-curves in the optical. These observations will sample the torus more faithfully than previous measurements made in the K-band. Such high fidelity, continuously sampled IR light curves covering ~years cannot be obtained from the ground, and are needed because the expected reverberation timescales are hundreds of days. We will apply well developed techniques to determine the reverberation lag and therefore obtain the characteristic size of the torus in this sample which spans a range of black hole mass and Eddington ratio. Our team contains many leading experts in reverberation mapping of AGN and in the observational study and theoretical modeling of the physics of the dusty torus. We are requesting a total of 14 hours in the cycle to perform our observations. These observations will provide a stringent observational test of current models for the obscuring torus in AGN. The required measurements - long timescales, continuous monitoring in the near-infrared - are possible only with the
Global structure of regular tori in a generic 4D symplectic map
Lange, S.; Richter, M.; Onken, F.; Bäcker, A.; Ketzmerick, R.
2014-06-01
For the case of generic 4d symplectic maps with a mixed phase space, we investigate the global organization of regular tori. For this, we compute elliptic 1-tori of two coupled standard maps and display them in a 3d phase-space slice. This visualizes how all regular 2-tori are organized around a skeleton of elliptic 1-tori in the 4d phase space. The 1-tori occur in two types of one-parameter families: (α) Lyapunov families emanating from elliptic-elliptic periodic orbits, which are observed to exist even far away from them and beyond major resonance gaps, and (β) families originating from rank-1 resonances. At resonance gaps of both types of families either (i) periodic orbits exist, similar to the Poincaré-Birkhoff theorem for 2d maps, or (ii) the family may form large bends. In combination, these results allow for describing the hierarchical structure of regular tori in the 4d phase space analogously to the islands-around-islands hierarchy in 2d maps.
Low-dimensional q-Tori in FPU Lattices: Dynamics and Localization Properties
Christodoulidi, Helen
2012-01-01
This is a continuation of our study concerning q-tori, i.e. tori of low dimensionality in the phase space of nonlinear lattice models like the Fermi-Pasta-Ulam (FPU) model. In our previous work we focused on the beta FPU system, and we showed that the dynamical features of the q-tori serve as an interpretational tool to understand phenomena of energy localization in the FPU space of linear normal modes. In the present paper i) we employ the method of Poincare - Lindstedt series, for a fixed set of frequencies, in order to compute an explicit quasi-periodic representation of the trajectories lying on q-tori in the alpha model, and ii) we consider more general types of initial excitations in both the alpha and beta models. Furthermore we turn into questions of physical interest related to the dynamical features of the q-tori. We focus on particular q-tori solutions describing low-frequency `packets' of modes, and excitations of a small set of modes with an arbitrary distribution in q-space. In the former case, ...
Aprotické elektrolyty pro superkondenzátory
2010-01-01
Diplomová práce ověřuje vhodnost použití různých typů aprotických elektrolytů pro superkondenzátory, využívá metody impedanční spektroskopie k měření měrné iontové vodivosti a cyklické voltametrie k určení velikosti potenciálových oken. Použitá aprotická rozpouštědla - propylenkarbonát, dimethylsulfoxid, N, N dimethylformamid, ethylenkarbonát, dimethylkarbonát, diethylkarbonát a acetonitril. Do rozpouštědel byly přidány soli - LiClO4, NaClO4, KClO4, LiBF4, LiPF6, TEABF4 a TMABF4, za vzniku ro...
M-theory FDA, Twisted Tori and Chevalley Cohomology
Fré, P
2006-01-01
The FDA algebras emerging from twisted tori compactifications of M-theory with fluxes are discussed within the general classification scheme provided by Sullivan's theorems and by Chevalley cohomology. It is shown that the generalized Maurer Cartan equations which have appeared in the literature, in spite of their complicated appearance and contrary to opposite claims, once suitably decoded within cohomology, lead to trivial FDA.s, all new p--form generators being contractible when the 4--form flux is cohomologically trivial. Non trivial D=4 FDA.s can emerge from non trivial fluxes but only if the cohomology class of the flux satisfies an additional algebraic condition which appears not to be satisfied in general and has to be studied for each algebra separately. As an illustration an exhaustive study of Chevalley cohomology for the simplest class of SS algebras is presented but a general formalism is developed, based on the structure of a double elliptic complex, which, besides providing the presented result...
Adiabatic Compression of Compact Tori for Current Drive and Heating
Woodruff, Simon; McNab, Angus; Miller, Kenneth; Ziemba, Tim
2008-11-01
Several critical issues stand in the development path for compact tori. An important one is the production of strong magnetic fields, (or large flux amplifications) by use of a low current source. The Pulsed Build-up Experiment is a Phase II SBIR project in which we aim to show a new means for generating strong magnetic fields from a low current source, namely, the repetitive injection of helicity-bearing plasma that also undergoes an acceleration and compression. In the Phase I SBIR, advanced computations were benchmarked against analytic theory and run to determine the best means for the acceleration and compression of a compact torus plasma. The study included detailed simulations of magnetic reconnection. In Phase II, an experiment has been designed and is being built to produce strong magnetic fields in a spheromak by the repetitive injection of magnetic helicity from a low current coaxial plasma source. The plasma will be accelerated and compressed in a similar manner to a traveling wave adiabatic compression scheme that was previously applied to a mirror plasma [1]. [1] P. M. Bellan Scalings for a Traveling Mirror Adiabatic Magnetic Compressor Rev. Sci. Instrum. 53(8) 1214 (1982) Work supported by DOE Grant No. DE-FG02-06ER84449.
Testicular measurements and daily sperm output of Tori and Estonian breed stallions.
Kavak, A; Lundeheim, N; Aidnik, M; Einarsson, S
2003-06-01
Evaluation of testicular measurements and daily sperm output (DSO) yields valuable information for predicting the reproductive capacity of stallions. The present study evaluated testicular measurements (height, length, width and circumference) and DSO of eight Tori and eight Estonian breed stallions. One ejaculate of semen was collected daily for 10 subsequent days from each stallion. The gel-free volume of semen was measured with a graduated glass cylinder and the sperm concentration was assessed with a Chorjajev chamber. The volume of gel-free fraction was multiplied by the sperm concentration to give the total number of spermatozoa (TSN). The DSO was calculated as mean TSN of collection on days 8-10 in Tori breed stallions and on days 4-10 in Estonian breed stallions. The DSO of Tori breed stallions was 12.9 x 109 spermatozoa and of Estonian breed stallions 4.5 x 109 spermatozoa (p Estonian breed stallions; right testis- height 7.4, length 10.6 and width 7.4 in Tori breed stallions, and 5.5, 7.4 and 5.3, respectively, in Estonian breed stallions. All these testicular measurements were significantly smaller in Estonian than in Tori breed stallions (p Estonian breed stallions, respectively (p Estonian (p Estonian breed stallions.
Efficient Indirect All-to-All Personalized Communication on Rings and 2-D Tori
Institute of Scientific and Technical Information of China (English)
GU Naijie
2001-01-01
All-to-All personalized communication is a basic communication operation in a parallel computing environment. There are a lot of results appearing in literature. All these communication algorithms can be divided into two kinds: direct communication algorithm and indirect communication algorithm. The optimal direct all-to-all communication algorithm on rings and 2-D tori does exist. But, for indirect all-to-all communication algorithms, there is a gap between the time complexity of the already existing algorithm and the lower bound. In this paper an efficient indirect algorithm for all-to-all communication on rings and 2-D square tori with bidirection channels is presented. The algorithms is faster than any previous indirect algorithms. The main items of the time complexity of the algorithm is p2/8 and pa/2/8 on rings and 2-D tori respectively, both reaching the theoretical lower bound, where p is the number of processors.
2008-01-01
Eesti Laulu- ja Tantsupeo SA ja maavalitsused, sh. Pärnu maavalitsus sõlmisid kultuuriministeeriumis koostöölepingu. Pianist Gerly Kättmann ja näitleja Ena Kõrv esitavad 16. mail Pärnu-Jaagupi Muusikakoolis Leelo Tungla muusikalise muinasjutu, mille vahele kõlab Eesti heliloojate klaverimuusika. Tori valla laste 11. laulukonkursist 18. mail Tori rahvamajas
Hunter, Richard
2010-01-01
It is known that all weakly conformal Hamiltonian stationary Lagrangian immersions of tori in the complex projective plane may be constructed by methods from integrable systems theory. This article describes the precise details of a construction which leads to a form of classification. The immersion is encoded as spectral data in a similar manner to the case of minimal Lagrangian tori in the complex projective plane, but the details require a careful treatment of both the "dressing construction" and the spectral data to deal with a loop of flat connexions which is quadratic in the loop parameter.
Whitney smooth families of invariant tori within the reversible context 2 of KAM theory
Sevryuk, Mikhail B.
2016-11-01
We prove a general theorem on the persistence of Whitney C ∞-smooth families of invariant tori in the reversible context 2 of KAM theory. This context refers to the situation where dim Fix G Fix G is the fixed point manifold of the reversing involution G and T is the invariant torus in question. Our result is obtained as a corollary of the theorem by H. W.Broer, M.-C.Ciocci, H.Hanßmann, and A.Vanderbauwhede (2009) concerning quasi-periodic stability of invariant tori with singular "normal" matrices in reversible systems.
The Witten–Reshetikhin–Turaev invariant for links in finite order mapping tori I
DEFF Research Database (Denmark)
Andersen, Jørgen Ellegaard; Himpel, Benjamin; Jørgensen, Søren Fuglede;
2017-01-01
We state Asymptotic Expansion and Growth Rate conjectures for the Witten–Reshetikhin–Turaev invariants of arbitrary framed links in 3-manifolds, and we prove these conjectures for the natural links in mapping tori of finite-order automorphisms of marked surfaces. Our approach is based upon geomet...
Periodic Orbits and Invariant Tori from a Semistable Limit Cycle in the Fast Dynamics
Institute of Scientific and Technical Information of China (English)
无
2006-01-01
Some global behavior for a slowly varying oscillator was investigated. Based on a series of transformations and the theory of periodic orbits and integral manifold, the bifurcations of subharmonic solutions and invariant tori generated from a semistable limit cycle in the fast dynamics were discussed.
Where are the Dust Tori of Mars? - A Possible Role of Stochastic Effects
Makuch, M.; Brilliantov, N. V.; Spahn, F.; Krivov, A. V.
2005-08-01
Dust tori around Mars were predicted theoretically several decades ago, but still escape direct detection. On the base of our recent analytical and numerical studies we re-assess expected properties of the dust belts. In addition to deterministic models developed before we investigate the influence of stochastic effects on the dynamics, lifetimes of particles, and configuration of the dust tori. There exist various sources of stochasticity. For instance, we consider the influence of solar radiation on an ensemble of differently-shaped dust particles. Following the ergodic hypothesis, the dynamics of a single dust grain exposed to fluctuating radiation mimics the stochastic evolution of the whole ensemble. Further, we study the action of the planetary shadow on the dynamics of dust particles, a perturbation which turns out to be stochastic. Additional stochastic perturbations of deterministic dust trajectories are expected to be caused by different material properties of the dust grains, fluctuations of the solar wind, and the related magnetic field. As a result the fluctuating forces cause a diffusion of the dust configuration whose related fluxes can be estimated from our numerical experiments. This effect leads to a decrease of the expected optical depth of the tori, which is mainly determined by the strength of the stochastic force. We will provide estimates for the latter resulting in a diffusion coefficient. This will give new information about change of the configuration and lifetimes of the Martian dust-tori.
Null, Elizabeth Higgins
The Roger Tory Peterson Institute (Jamestown, New York) has been sparking a regional revival in K-12 nature studies and attracting attention from educators across America. Through summer training sessions and workshops, the Institute introduces multidisciplinary teams of teachers and community members to empirical research techniques for observing…
Directory of Open Access Journals (Sweden)
Swapna S Khatu
2011-01-01
Full Text Available Four types of elastosis perforans serpiginosa (EPS have been described in literature: 1 idiopathic EPS, 2 reactive perforating elastosis associated with connective tissue disorders, 3 in some instances of pseudoxanthoma elasticum (PXE, disease-specific calcified elastic tissue is extruded, producing a clinical picture indistinguishable from other types, may also be seen in patients undergoing hemodialysis and 4 EPS induced by long-term treatment with D-penicillamine is observed in patients suffering from Wilson′s disease. Long term D-penicillamine therapy causes an alteration in the dermal elastic tissue. D-penicillamine induced EPS has a distinctive histopathologic feature - serrated appearance of elastic fibers due to perpendicular budding from their surface giving a "lumpy-bumpy" look. D-penicillamine induced elastic fiber alteration may not always manifest clinically as EPS. We report a case of D-penicillamine induced widespread alteration in skin elastic tissue with distinct histopathologic features.
Khatu, Swapna S; Dhurat, Rachita S; Nayak, Chitra S; Pereira, Rickson R; Kagne, Rucha B
2011-01-01
Four types of elastosis perforans serpiginosa (EPS) have been described in literature: 1) idiopathic EPS, 2) reactive perforating elastosis associated with connective tissue disorders, 3) in some instances of pseudoxanthoma elasticum (PXE), disease-specific calcified elastic tissue is extruded, producing a clinical picture indistinguishable from other types, may also be seen in patients undergoing hemodialysis and 4) EPS induced by long-term treatment with D-penicillamine is observed in patients suffering from Wilson's disease. Long term D-penicillamine therapy causes an alteration in the dermal elastic tissue. D-penicillamine induced EPS has a distinctive histopathologic feature - serrated appearance of elastic fibers due to perpendicular budding from their surface giving a "lumpy-bumpy" look. D-penicillamine induced elastic fiber alteration may not always manifest clinically as EPS. We report a case of D-penicillamine induced widespread alteration in skin elastic tissue with distinct histopathologic features.
Roth, J. R.
1976-01-01
Parametric variation of independent variables which may affect the characteristics of bumpy torus plasma have identified those which have a significant effect on the plasma current, ion kinetic temperature, and plasma number density, and those which do not. Empirical power law correlations of the plasma current, and the ion kinetic temperature and number density were obtained as functions of potential applied to the midplane electrode rings, the background neutral gas pressure, and the magnetic field strength. Additional parameters studied included the type of gas, the polarity of the midplane electrode rings, the mode of plasma operation, and the method of measuring the plasma number density. No significant departures from the scaling laws appear to occur at the highest ion kinetic temperatures or number densities obtained to date.
Bifurcations of families of 1D-tori in 4D symplectic maps.
Onken, Franziska; Lange, Steffen; Ketzmerick, Roland; Bäcker, Arnd
2016-06-01
The regular structures of a generic 4d symplectic map with a mixed phase space are organized by one-parameter families of elliptic 1d-tori. Such families show prominent bends, gaps, and new branches. We explain these features in terms of bifurcations of the families when crossing a resonance. For these bifurcations, no external parameter has to be varied. Instead, the longitudinal frequency, which varies along the family, plays the role of the bifurcation parameter. As an example, we study two coupled standard maps by visualizing the elliptic and hyperbolic 1d-tori in a 3d phase-space slice, local 2d projections, and frequency space. The observed bifurcations are consistent with the analytical predictions previously obtained for quasi-periodically forced oscillators. Moreover, the new families emerging from such a bifurcation form the skeleton of the corresponding resonance channel.
KAM tori in 1D random discrete nonlinear Schr\\"odinger model?
Johansson, Magnus; Aubry, Serge
2010-01-01
We suggest that KAM theory could be extended for certain infinite-dimensional systems with purely discrete linear spectrum. We provide empirical arguments for the existence of square summable infinite-dimensional invariant tori in the random discrete nonlinear Schr\\"odinger equation, appearing with a finite probability for a given initial condition with sufficiently small norm. Numerical support for the existence of a fat Cantor set of initial conditions generating almost-periodic oscillations is obtained by analyzing (i) sets of recurrent trajectories over successively larger time scales, and (ii) finite-time Lyapunov exponents. The norm region where such KAM-like tori may exist shrinks to zero when the disorder strength goes to zero and the localization length diverges.
Bifurcations of families of 1D-tori in 4D symplectic maps
Onken, Franziska; Lange, Steffen; Ketzmerick, Roland; Bäcker, Arnd
2016-06-01
The regular structures of a generic 4d symplectic map with a mixed phase space are organized by one-parameter families of elliptic 1d-tori. Such families show prominent bends, gaps, and new branches. We explain these features in terms of bifurcations of the families when crossing a resonance. For these bifurcations, no external parameter has to be varied. Instead, the longitudinal frequency, which varies along the family, plays the role of the bifurcation parameter. As an example, we study two coupled standard maps by visualizing the elliptic and hyperbolic 1d-tori in a 3d phase-space slice, local 2d projections, and frequency space. The observed bifurcations are consistent with the analytical predictions previously obtained for quasi-periodically forced oscillators. Moreover, the new families emerging from such a bifurcation form the skeleton of the corresponding resonance channel.
Computation of invariant tori in 2 1/2 degrees of freedom
Energy Technology Data Exchange (ETDEWEB)
Gabella, W.E. (Colorado Univ., Boulder, CO (USA). Dept. of Physics); Ruth, R.D.; Warnock, R.L. (Stanford Linear Accelerator Center, Menlo Park, CA (USA))
1991-01-01
Approximate invariant tori in phase space are found using a non-perturbative, numerical solution of the Hamilton-Jacobi equation for a nonlinear, time-periodic Hamiltonian. The Hamiltonian is written in the action-angle variables of its solvable part. The solution of the Hamilton-Jacobi equation is represented as a Fourier series in the angle variables but not in the time' variable. The Fourier coefficients of the solution are regarded as the fixed point of a nonlinear map. The fixed point is found using a simple iteration or a Newton-Broyden iteration. The Newton-Broyden method is slower than the simple iteration, but it yields solutions at amplitudes that are significant compared to the dynamic aperture.' Invariant tori are found for the dynamics of a charged particle in a storage ring with sextupole magnets. 10 refs., 3 figs., 3 tabs.
Doubly twisted Neimark–Sacker bifurcation and two coexisting two-dimensional tori
Energy Technology Data Exchange (ETDEWEB)
Sekikawa, Munehisa, E-mail: sekikawa@cc.utsunomiya-u.ac.jp [Department of Mechanical and Intelligent Engineering, Utsunomiya University, Utsunomiya 321-8585 (Japan); Inaba, Naohiko [Organization for the Strategic Coordination of Research and Intellectual Properties, Meiji University, Kawasaki 214-8571 (Japan)
2016-01-08
We discuss a complicated bifurcation structure involving several quasiperiodic bifurcations generated in a three-coupled delayed logistic map where a doubly twisted Neimark–Sacker bifurcation causes a transition from two coexisting periodic attractors to two coexisting invariant closed circles (ICCs) corresponding to two two-dimensional tori in a vector field. Such bifurcation structures are observed in Arnol'd tongues. Lyapunov and bifurcation analyses suggest that the two coexisting ICCs and the two coexisting periodic solutions almost overlap in the two-parameter bifurcation diagram. - Highlights: • This study investigates a three-coupled delayed logistic map. • It generates complex quasiperiodic bifurcations. • Two periodic solution coexist in a conventional Arnol'd tongue. • Two two-tori coexist in a high-dimensional Arnol'd tongue.
Radiation-driven outflows from and radiative support in dusty tori of active galactic nuclei
Chan, Chi-Ho
2015-01-01
Substantial evidence points to dusty, geometrically thick tori obscuring the central engines of active galactic nuclei, but so far no mechanism satisfactorily explains why cool dust in the torus remains in a puffy geometry. Infrared (IR) radiation pressure on dust can play a significant role in shaping the torus, yet the separation of hydrodynamic evolution from radiative transfer (RT) in previous work on radiation-supported tori precluded a self-consistent picture. Here we present radiative hydrodynamics simulations of an initially smooth torus; we solve the hydrodynamics equations, the time-dependent multi-angle group IR RT equation, and the time-independent ultraviolet (UV) RT equation. IR radiation is highly anisotropic, leaving primarily through the central hole of the torus. The inner edge of the torus exhibits a break in axisymmetry under the influence of radiation and differential rotation. In addition, UV radiation pressure on dust launches a strong wind along the inner edge of the torus with speed $...
Supersymmetry algebra and BPS states of super Yang-Mills theories on noncommutative tori
Konechny, Anatoly; Schwarz, Albert
1999-04-01
We consider 10-dimensional super Yang-Mills theory with topological terms compactified on a noncommutative torus. We calculate supersymmetry algebra and derive BPS energy spectra from it. The cases of d-dimensional tori with d=2,3,4 are considered in full detail. SO(d,d,Z)-invariance of the BPS spectrum and relation of new results to the previous work in this direction are discussed.
Embeddings of maximal tori in classical groups over local and global fields
Bayer-Fluckiger, E.; Lee, T.-Y.; Parimala, R.
2016-08-01
Embeddings of maximal tori in classical groups over fields of characteristic not 2 are the subject matter of several recent papers. The aim of the present paper is to give necessary and sufficient conditions for such an embedding to exist, when the base field is a local field, or the field of real numbers. This completes the results of [3], where a complete criterion is given for the Hasse principle to hold when the base field is a global field.
Circumplanetary dust dynamics : application to Martian dust tori and Enceladus dust plumes
Makuch, Martin
2007-01-01
Our Solar system contains a large amount of dust, containing valuable information about our close cosmic environment. If created in a planet's system, the particles stay predominantly in its vicinity and can form extended dust envelopes, tori or rings around them. A fascinating example of these complexes are Saturnian rings containing a wide range of particles sizes from house-size objects in the main rings up to micron-sized grains constituting the E ring. Other example are ring systems in g...
Lindstedt series and Hamilton-Jacobi equation for hyperbolic tori in three time scales problems
Gallavotti, G; Mastropietro, V; Gallavotti, Giovannni; Gentile, Guido; Astropietro, Vieri M
1998-01-01
Interacting systems consisting of two rotators and a pendulum are considered, in a case in which the uncoupled systems have three very different characteristic time scales. The abundance of unstable quasi periodic motions in phase space is studied via Lindstedt series. The result is a strong improvement, compared to our previous results, on the domain of validity of bounds that imply existence of invariant tori, large homoclinic angles, long heteroclinic chains and drift--diffusion in phase space.
Tori Amos 《American Doll Posse》闪亮出炉
Institute of Scientific and Technical Information of China (English)
Karen
2007-01-01
最近,Tori Amos的新专辑《American Doll Posse》问世。虽然她去年发行了精选集,但这张专辑是2005年《the Beekeeper》以来的首张录音室作品。专辑发行的同时,Amos将踏上世界巡演的路程,5月28日的巡演第一站设在罗马。
KAM tori for higher dimensional beam equation with a fixed constant potential
Institute of Scientific and Technical Information of China (English)
2009-01-01
In this paper, we consider the higher dimensional nonlinear beam equation:utt+△2u+σu + f(u)=0 with periodic boundary conditions, where the nonlinearity f(u) is a real-analytic function of the form f(u)=u3+ h.o.t near u=0 and σ is a positive constant. It is proved that for any fixed σ>0, the above equation admits a family of small-amplitude, linearly stable quasi-periodic solutions corresponding to finite dimensional invariant tori of an associated infinite dimensional dynamical system.
KAM tori for higher dimensional beam equation with a fixed constant potential
Institute of Scientific and Technical Information of China (English)
XU XinDong; GENG JianSheng
2009-01-01
In this paper, we consider the higher dimensional nonlinear beam equation……with periodic boundary conditions, where the nonlinearity f(u) is a real-analytic function of the form f(u)=u3+ h.o.t near u = 0 and σ is a positive constant. It is proved that for any fixed σ> 0, the above equation admits a family of small-amplitude, linearly stable quasi-periodic solutions corresponding to finite dimensional invariant tori of an associated infinite dimensional dynamical system.
Konopelchenko, B G
1995-01-01
A new approach is proposed for study structure and properties of the total squared mean curvature $W$ of surfaces in ${\\bf R}^3$. It is based on the generalized Weierstrass formulae for inducing surfaces. The quantity $W$ (Willmore functional) is shown to be invariant under the modified Novikov--Veselov hierarchy of integrable flows. The $1+1$--dimensional case and, in particular, Willmore tori of revolution, are studied in details. The Willmore conjecture is proved for the mKDV--invariant Willmore tori.
Institute of Scientific and Technical Information of China (English)
HUANG Wei; YUAN Cai; Ansaldi Mireille; Morelli Xavier; Edward J. Meehan; CHEN Li-Qing; HUANG Ming-Dong
2007-01-01
TorI, a Tor system inhibitor acting through protein-protein interaction with the TorR response regulator, is an excisionase that interacts with the integrase and DNA during prophage excision. It has been crystallized by the vapor-diffusion method using polyethylene glycol 3350 as a precipitant at pH 8.5. The X-ray diffraction data sets from the TorI crystal was collected at a resolution of 2.1 (A), using a synchrotron source. The crystal belongs to primitive monoclinic lattice with cell parameters of 46.210(A) × 53.992(A) × 73.561(A)
AGN Dusty Tori as a Clumpy Two-Phase Medium: The 10 Micron Silicate Feature
Stalevski, Marko; Baes, Maarten; Nakos, Theodoros; Popovic, Luka C
2011-01-01
We investigated the emission of active galactic nuclei dusty tori in the infrared domain, with a focus on the 10 micron silicate feature. We modeled the dusty torus as a clumpy two-phase medium with high-density clumps and a low-density medium filling the space between the clumps. We employed a three-dimensional radiative transfer code to obtain spectral energy distributions and images of tori at different wavelengths. We calculated a grid of models for different parameters and analyzed the influence of these parameters on the shape of the mid-infrared emission. A corresponding set of clumps-only models and models with a smooth dust distribution is calculated for comparison. We found that the dust distribution, the optical depth and a random arrangement of clumps in the innermost region, all have an impact on the shape and strength of the silicate feature. The 10 micron silicate feature can be suppressed for some parameters, but models with smooth dust distribution are also able to produce a wide range of the...
Roger Tory Peterson Inst. of Natural History, Inc., Jamestown, NY.
This report was written to extend the findings of the Roger Tory Peterson Institute's 1990 forum on early-childhood environmental education. The report begins with an overview of Peterson's own childhood experiences that influenced his career as a naturalist. Peterson developed a hands-on interest in nature as a very young boy. His case is not…
Shaghaghian, M
2016-01-01
We examine a thick accretion disc in the presence of external gravity and intrinsic dipolar magnetic field due to a non-rotating central object. In this paper, we generalize the Newtonian theory of stationary axisymmetric resistive tori of Tripathy, Prasanna $\\&$ Das (1990) by including the fully general relativistic features. If we are to obtain the steady state configuration, we have to take into account the finite resistivity for the magnetofluid in order to avoid the piling up of the field lines anywhere in the accretion discs. The efficient value of conductivity must be much smaller than the classical conductivity to be astrophysically interesting. The accreting plasma in the presence of an external dipole magnetic field gives rise to a current in the azimuthal direction. The azimuthal current produced due to the motion of the magnetofluid modifies the magnetic field structure inside the disc and generates a poloidal magnetic field for the disc. The solutions we have found show that the radial inflow...
The existence of Hamiltonian stationary Lagrangian tori in Kahler manifolds of any dimension
Lee, Yng-Ing
2010-01-01
Hamiltonian stationary Lagrangians are Lagrangian submanifolds that are critical points of the volume functional under Hamiltonian deformations. They can be considered as a generalization of special Lagrangians or Lagrangian and minimal submanifolds. Joyce, Schoen and the author show that given any compact rigid Hamiltonian stationary Lagrangian in $\\C^n$, one can always find a family of Hamiltonian stationary Lagrangians of the same type in any compact symplectic manifolds with a compatible metric. The advantage of this result is that it holds in very general classes. But the disadvantage is that we do not know where these examples locate and examples in this family might be far apart. In this paper, we derive a local condition on Kahler manifolds which ensures the existence of one family of Hamiltonian stationary Lagrangian tori near a point with given frame satisfying the criterion. Butscher and Corvino ever proposed a condition in n=2. But our condition appears to be different from theirs. The condition d...
NADA: A new code for studying self-gravitating tori around black holes
Montero, Pedro J; Shibata, Masaru
2008-01-01
We present a new two-dimensional numerical code called Nada designed to solve the full Einstein equations coupled to the general relativistic hydrodynamics equations. The code is mainly intended for studies of self-gravitating accretion disks (or tori) around black holes, although it is also suitable for regular spacetimes. Concerning technical aspects the Einstein equations are formulated and solved in the code using a formulation of the standard 3+1 (ADM) system, the so-called BSSN approach. A key feature of the code is that derivative terms in the spacetime evolution equations are computed using a fourth-order centered finite difference approximation in conjunction with the Cartoon method to impose the axisymmetry condition under Cartesian coordinates (the choice in Nada), and the puncture/moving puncture approach to carry out black hole evolutions. Correspondingly, the general relativistic hydrodynamics equations are written in flux-conservative form and solved with high-resolution, shock-capturing scheme...
Cremaschini, Claudio; Slaný, Petr; Stuchlík, Zdeněk; Karas, Vladimír
2013-01-01
The possible occurrence of equilibrium off-equatorial tori in the gravitational and electromagnetic fields of astrophysical compact objects has been recently proved based on non-ideal MHD theory. These stationary structures can represent plausible candidates for the modelling of coronal plasmas expected to arise in association with accretion discs. However, accretion disc coronae are formed by a highly diluted environment, and so the fluid description may be inappropriate. The question is posed of whether similar off-equatorial solutions can be determined also in the case of collisionless plasmas for which treatment based on kinetic theory, rather than fluid one, is demanded. In this paper the issue is addressed in the framework of the Vlasov-Maxwell description for non-relativistic multi-species axisymmetric plasmas subject to an external dominant spherical gravitational and dipolar magnetic field. Equilibrium configurations are investigated and explicit solutions for the species kinetic distribution functio...
The Witten-Reshetikhin-Turaev invariants of finite order mapping tori I
DEFF Research Database (Denmark)
Ellegaard Andersen, Jørgen
is a polynomial in the level $k$, weighted by a complex phase, which is $k$ times the Chern-Simons invariant corresponding to the component. We express the coefficients of these polynomials in terms of cohomological pairings on the fixed point set of the moduli space of flat connections on the surface. We...... explicitly describe the fixed point set in terms of moduli spaces of the quotient orbifold Riemann surface and for the smooth components we express the aforementioned coefficients in terms of the known generators of the cohomology ring. We provide an explicit formula in terms of the Seifert invariants......We formulate the Asymptotic Expansion Conjecture for the Witten-Reshetikhin-Turaev quantum invariants of closed oriented three manifolds. For finite order mapping tori, we study these quantum invariants via the geometric gauge theory approach to the corresponding quantum representations and prove...
Simulations of flux variability of oscillating accretion fluid tori around Kerr black holes
Bakala, Pavel; Šrámková, Eva; Kotrlová, Andrea; Török, Gabriel; Vincent, Frederic H; Abramowicz, Marek A
2014-01-01
High frequency quasi-periodic oscillations (HF QPOs) are observed in the X-ray power-density spectra (PDS) of several microquasars and low mass X-ray binaries. Many proposed QPO models are based on oscillations of accretion toroidal fluid structures orbiting in the vicinity of a compact object. We study oscillating accretion tori orbiting in the vicinity of a Kerr black hole. We demonstrate that significant variation of the observed flux can be caused by the combination of radial and vertical oscillation modes of a slender, polytropic, perfect fluid, non-self-graviting torus with constant specific angular momentum. We investigate two combinations of the oscillating modes corresponding to the direct resonance QPO model and the modified relativistic precession QPO model.
Toroidal orbifolds of Z3 and Z6 symmetries of noncommutative tori
Walters, Sam
2015-05-01
The Hexic transform ρ of the noncommutative 2-torus Aθ is the canonical order 6 automorphism defined by ρ (U) = V, ρ (V) =e-πiθU-1 V, where U, V are the canonical unitary generators obeying the unitary Heisenberg commutation relation VU =e2πiθ UV . The Cubic transform is κ =ρ2. These are canonical analogues of the noncommutative Fourier transform, and their associated fixed point C*-algebras Aθρ, Aθκ are noncommutative Z6, Z3 toroidal orbifolds, respectively. For a large class of irrationals θ and rational approximations p / q of θ, a projection e of trace q2 θ - pq is constructed in Aθ that is invariant under the Hexic transform. Further, this projection is shown to be a matrix projection in the sense that it is approximately central, the cut down algebra eAθ e contains a Hexic invariant q × q matrix algebra M whose unit is e and such that the cut downs eUe, eVe are approximately inside M. It is also shown that these invariant matrix projections are covariant in that they arise from a continuous section E (t) of C∞-projections of the continuous field {At } 0 < t < 1 of noncommutative tori C*-algebras such that ρ (E (t)) = E (t). It turns out that the projection E (t) is the support projection of a canonical C∞-positive element that has the appearance of a noncommutative 2-dimensional Theta function. The topological invariants (or 'quantum' numbers) of E (t), e, and related projections are computed by a new and quicker method than in previous works. (They would also give topological invariants for finitely generated projective modules over noncommutative orbifolds associated to Z6 and Z3 symmetries of noncommutative tori.) We remark that these results have some bearing on research work related to noncommutative orbifolds used in string theory.
Sato, Noriyosi; Ochi, Daisuke; Minami, Hiroshi; Yokawa, Kotaro
2012-01-01
To improve the effectiveness of tori-lines it is necessary to evaluate the ability of tori-lines to mitigate seabird bycatch and determine what kind of seabird species gather during line settings, attack the bait and are incidentally caught. We conducted two experiments in the western North Pacific and examined the effectiveness for seabird mitigation of light streamer tori-lines which have no long streamers but many light (short) streamers and are mainly used in the North Pacific area. Firstly, the effectiveness of two different types of tori-line (light streamer (1 m) and long streamer (up to 7 m) tori-line) and of two different colors (yellow and red) of light streamers for seabird bycatch avoidance was evaluated using 567 sets based on data from 20 offshore surface commercial longliners. No significant difference in the bycatch number between the different tori-line types and streamer colors was found. Secondly, we investigated the characteristics of the seabird bycatch in the North Pacific and the effectiveness of three different types of streamers (light, hybrid and modified light types) by detailed observations of seabird attacks using a chartered longline vessel. Although the appearance rate of albatrosses and shearwaters were 40.9% and 27.7%, Laysan albatross was the main seabird species that followed the vessel but shearwaters seldom followed the vessel and did not aggregate during line setting. In all attacks on bait observed during line settings, 81% and 7% were by albatrosses and shearwaters, respectively. In the number of primary attacks by Laysan albatrosses which attacked most aggressively of all seabirds, there were no significant differences among the tori-line types. No individuals of shearwater were caught. The results of both experiments indicated that light streamer tori-lines were as effective as tori-lines with long streamers for mitigating seabird bycatch in the North Pacific.
Directory of Open Access Journals (Sweden)
Noriyosi Sato
Full Text Available To improve the effectiveness of tori-lines it is necessary to evaluate the ability of tori-lines to mitigate seabird bycatch and determine what kind of seabird species gather during line settings, attack the bait and are incidentally caught. We conducted two experiments in the western North Pacific and examined the effectiveness for seabird mitigation of light streamer tori-lines which have no long streamers but many light (short streamers and are mainly used in the North Pacific area. Firstly, the effectiveness of two different types of tori-line (light streamer (1 m and long streamer (up to 7 m tori-line and of two different colors (yellow and red of light streamers for seabird bycatch avoidance was evaluated using 567 sets based on data from 20 offshore surface commercial longliners. No significant difference in the bycatch number between the different tori-line types and streamer colors was found. Secondly, we investigated the characteristics of the seabird bycatch in the North Pacific and the effectiveness of three different types of streamers (light, hybrid and modified light types by detailed observations of seabird attacks using a chartered longline vessel. Although the appearance rate of albatrosses and shearwaters were 40.9% and 27.7%, Laysan albatross was the main seabird species that followed the vessel but shearwaters seldom followed the vessel and did not aggregate during line setting. In all attacks on bait observed during line settings, 81% and 7% were by albatrosses and shearwaters, respectively. In the number of primary attacks by Laysan albatrosses which attacked most aggressively of all seabirds, there were no significant differences among the tori-line types. No individuals of shearwater were caught. The results of both experiments indicated that light streamer tori-lines were as effective as tori-lines with long streamers for mitigating seabird bycatch in the North Pacific.
Jennings, M.R.
1987-01-01
Review of: A Field Guide to Western Reptiles and Amphibians (Peterson Field Guides, No. 16). Robert C. Stebbins and Roger Tory Peterson. Houghton Mifflin; 2nd Revised edition (June 10, 1985). 448 pages. ISBN: 978-0395382530.
Persistence of Hyperbolic Tori in Generalized Hamiltonian Systems%广义Hamilton系统中双曲环面的保持性
Institute of Scientific and Technical Information of China (English)
柳振鑫; 伊贺达赉; 黄庆道
2005-01-01
In this paper we prove the persistence of hyperbolic invariant tori in generalized Hamiltonian systems, which may admit a distinct number of action and angle variables. The systems under consideration can be odd dimensional in tangent direction. Our results generalize the well-known results of Graff and Zehnder in standard Hamiltonians. In our case the unperturbed Hamiltonian systems may be degenerate. We also consider the persistence problem of hyperbolic tori on submanifolds.
2012-01-01
Parteneriatele de solidaritate ASAT sunt dezvoltate în România începând cu anul 2008, în vederea susţinerii micilor producători agricoli care cultivă natural. Dezvoltarea acestora este susţinută la nivel naţional de Asociaţia Centrul de Resurse pentru Iniţiative Eticeși Solidare (CRIES). Mecanismul este unul bazat pe construirea unui relaţii de încredere între producători locali şi consumatori urbani. Astfel,se formează la nivel comunitar grupuri de consumatori care doresc să achiziţioneze pr...
Reverberation Mapping of the size of the Dusty Tori in Active Galactic Nuclei.
Axon, David; Batcheldor, Daniel; Buchanan, Catherine; Capetti, Alessandro; Elitzur, Moshe; Gallimore, Jack; Geballe, Thomas; Horne, Keith; Kishimoto, Makoto; Marconi, Alessandro; Mason, Rachel; Maiolino, Roberto; Netzer, Hagai; Packham, Christopher; Perez, Enrique; Peterson, Brad; Tadhunter, Clive; Richmond, Michael; Robinson, Andrew; Stirpe, Giovanna; Storchi-Bergmann, Thaisa
2011-05-01
Despite its central role in AGN unification models and its importance for studies of supermassive black hole demographics, our current understanding of the size and structure of AGN tori is weak. We propose to use the unique opportunity provided by the warm phase of Spitzer to determine the sizes of circum-nuclear dust tori in AGN. To accomplish this we will carry out a monitoring campaign, coordinated with ground-based observations, to measure the 'light echo' as the dust emission responds to variations in the AGN optical/UV continuum. We have selected a sample of 12 bright type 1 nuclei in close proximity to the Spitzer Continuous Viewing Zone which can be observed repeatedly with visibility windows for at least 70% of the ~400 day cycle and generally > 90% (10 objects )of the ~400 day cycle. We will observe each AGN with 3 day sampling on Spitzer for the whole of Cycle 8. We have in place a plan for a supporting ground based monitoring program using a variety of conventional and robotic telescopes, which will allow ?world-wide? coverage, to determine the AGN light-curves in the B band. These observations will more than double the number of AGN with simultaneous optical and NIR time-series data, providing well-sampled, high signal-to-noise light curves of both S1 and NLS1. Such high fidelity, continuously sampled lR light curves covering hundreds of days cannot be obtained from the ground, and are needed because the expected reverberation time scales are many tens of days (30-150). We will apply well developed techniques to determine the reverberation lag and therefore obtain the characteristic size of the torus in this sample which has diverse properties and samples a range of black hole mass and Eddington ratio. Our team contains many leading experts in reverberation mapping of AGN and in the observational study and theoretical modeling of the physics of the dusty torus. We are requesting a total of 196 hrs in the cycle to perform our observations.
Institute of Scientific and Technical Information of China (English)
CHEN FENGYING
2010-01-01
@@ The world economic situation has been extremely complicated in 2010. This year saw fluctuating market confidence,changing commodity prices, imbalanced economic recovery, diverse economic policies, lingering trade protectionism, and fierce currency battles.
Institute of Scientific and Technical Information of China (English)
无
2010-01-01
The world economy crawls ahead amid risk and uncertainty The world economic situation has been extremely complicated in 2010. This year saw fluctuating market confidence,changing commodity prices, imbalanced economic recovery, diverse economic policies, lingering trade protectionism, and fierce currency battles.
Trova, A.; Karas, V.; Slaný, P.; Kovář, J.
2016-09-01
We present an analytical approach for the equilibrium of a self-gravitating charged fluid embedded in a spherical gravitational and dipolar magnetic fields produced by a central mass. Our scheme is proposed, as a toy model, in the context of gaseous/dusty tori surrounding supermassive black holes in galactic nuclei. While the central black hole dominates the gravitational field and remains electrically neutral, the surrounding material has a non-negligible self-gravitational effect on the torus structure. By charging mechanisms it also acquires non-zero electric charge density, so the two influences need to be taken into account to achieve a self-consistent picture. Using our approach we discuss the impact of self-gravity, represented by the term {d}{{t}} (ratio of the torus total mass to the mass of the central body), on the conditions for existence of the equilibrium and the morphology and typology of the tori. By comparison with a previous work without self-gravity, we show that the conditions can be different. Although the main aim of the present paper is to discuss a framework for the classification of electrically charged, magnetized, self-gravitating tori, we also mention potential astrophysical applications to vertically stratified fluid configurations.
Granato, G. L.; Danese, L.
1994-05-01
The continuum expected from active galactic nuclei (AGN) surrounded by thick tori is compared to the data available for a sample of optically selected Seyfert 1 galaxies. The optical and near-IR nuclear fluxes have previously been derived for these objects, and hence the spectral energy distributions (SEDs) of their active nuclei can be analysed. We perform detailed calculations of the 0.1 to 1000 micron SEDs for AGN surrounded by dust tori with different opening angles. The dust mixture is mimicked by using three silicate and three graphite grains of different sizes. The radiative transfer equation for a cloud having azimuthal symmetry and containing a mixture of dust grains is solved by means of a numerical code that takes absorption, emission and scattering into account. We discuss the optimization of the free parameters by comparing the spectra predicted by the code to available data. The general absence of the silicate emission feature at about 10 microns in the spectra of broad- line AGN and the general presence of the 10 micron silicate absorption feature in narrow-line AGN are addressed. The ensuing constraints are discussed. We show that models of thick tori extending up to a few hundred parsecs in which physical processes such as shocks significantly reduce the silicate grain abundance within the first few tens of parsecs are fully consistent with available broad-band data and high-resolution IR spectra of Seyfert 1 and 2 nuclei.
Clumpy tori illuminated by the anisotropic radiation of accretion discs in active galactic nuclei
He, Jian-Jian; Zhang, Shuang-Nan
2015-01-01
In this paper, we try to explain the observed correlation between the covering factor (CF) of hot dust and the properties of active galactic nuclei (AGNs), e.g., the bolometric luminosity ($L_{\\rm{bol}}$) and black hole mass ($M_{\\rm{BH}}$). Combining the possible dust distribution in the torus, the angular dependence of the radiation of the accretion disc, and the relation between the critical angle of torus and the Eddington ratio, there are eight possible models investigated in our work. We fit the observed CF with these models to determine the parameters of them. As a result, clumpy torus models can generally explain the observed correlations of tori, while the smooth models fail to produce the required CFs. However, there is still significant scatter even for the best-fitting model, which is the combination of a clumpy torus illuminated by the anisotropic radiation of accretion disc in an AGN. Although some of the observed scatter is due to the uncertainties in measuring $L_{\\rm{bol}}$ and $M_{\\rm{BH}}$,...
Mesh theory of angle modified dual tori double-enveloping toroidal worm drive
Institute of Scientific and Technical Information of China (English)
无
2010-01-01
In this paper, the meshing theory of the angle modified hourglass worm drive is enriched and developed. The ordinary condition of the angle modification is derived and the physical significance of the modification is interpreted. A normal section methodology is proposed for meshing analysis, which can be used to compute the normal distance near a singular meshing point of a conjugate surface couple. By means of the method and after analyzing the normal transversals, it is specified that the worm helicoid, the nominal former contact zone and the new contact zone intersect each other along the locus of singular points of the instantaneous contact lines of an angle-modified worm pair. As a result, it is explained clearly that those three osculate each other but the osculations are different in degree. Moreover, the mechanism of removing the twice-contacted zone from the worm gear tooth surface is clarified and the reason of shortening the worm working length is also elucidated. With the help of the theory described in the present paper and the thorough and systematic research on the relevant meshing characteristics, the angle modified dual tori double-enveloping toroidal worm drive has been shown to be an excellent new-fashioned hourglass worm set.
Twisted Six Dimensional Gauge Theories on Tori, Matrix Models,and Integrable Systems
Ganguli, S N; Gill, J A; Ganguli, Surya; Ganor, Ori J.; Gill, James A.
2004-01-01
We use the Dijkgraaf-Vafa technique to study massive vacua of 6D SU(N) SYM theories on tori with R-symmetry twists. One finds a matrix model living on the compactification torus with a genus-2 spectral curve whose Jacobian is closely related to a twisted four torus T in which the Seiberg-Witten curves of the theory are embedded. We also analyze R-symmetry twists in a bundle with nontrivial first Chern class which yields intrinsically 6D SUSY breaking and a novel matrix integral in which eigenvalues float in a sea of background charge. Next we analyze the underlying integrable system of the theory, whose phase space we show to be a system of N-1 points on T. We write down an explicit set of Poisson commuting Hamiltonians for this system for arbitrary N and use them to prove that equilbrium configurations with respect to all Hamiltonians correspond to points in moduli space where the Seiberg-Witten curve maximally degenerates to genus 2, thereby recovering the matrix model spectral curve. We also write down a c...
Twin peak HF QPOs as a spectral imprint of dual oscillation modes of accretion tori
Bakala, Pavel; Török, Gabriel; Šrámková, Eva; Abramowicz, Marek A; Vincent, Frederic H; Mazur, Grzegorz P
2015-01-01
High frequency (millisecond) quasi-periodic oscillations (HF QPOs) are observed in the X-ray power-density spectra of several microquasars and low mass X-ray binaries. Two distinct QPO peaks, so-called twin peak QPOs, are often detected simultaneously exhibiting their frequency ratio close or equal to 3/2. Following the analytic theory and previous studies of observable spectral signatures, we aim to model the twin peak QPOs as a spectral imprint of specific dual oscillation regime defined by a combination of the lowest radial and vertical oscillation mode of optically thick slender tori with constant specific angular momentum. We examined power spectra and fluorescent K$\\alpha$ iron line profiles for two different simulation setups with the mode frequency relations corresponding to the epicyclic resonance HF QPOs model and modified relativistic precession QPOs model. We use relativistic ray-tracing implemented in parallel simulation code LSDplus. In the background of the Kerr spacetime geometry, we analyze t...
Nada: A new code for studying self-gravitating tori around black holes
Montero, Pedro J.; Font, José A.; Shibata, Masaru
2008-09-01
We present a new two-dimensional numerical code called Nada designed to solve the full Einstein equations coupled to the general relativistic hydrodynamics equations. The code is mainly intended for studies of self-gravitating accretion disks (or tori) around black holes, although it is also suitable for regular spacetimes. Concerning technical aspects the Einstein equations are formulated and solved in the code using a formulation of the standard 3+1 Arnowitt-Deser-Misner canonical formalism system, the so-called Baumgarte-Shapiro Shibata-Nakamura approach. A key feature of the code is that derivative terms in the spacetime evolution equations are computed using a fourth-order centered finite difference approximation in conjunction with the Cartoon method to impose the axisymmetry condition under Cartesian coordinates (the choice in Nada), and the puncture/moving puncture approach to carry out black hole evolutions. Correspondingly, the general relativistic hydrodynamics equations are written in flux-conservative form and solved with high-resolution, shock-capturing schemes. We perform and discuss a number of tests to assess the accuracy and expected convergence of the code, namely, (single) black hole evolutions, shock tubes, and evolutions of both spherical and rotating relativistic stars in equilibrium, the gravitational collapse of a spherical relativistic star leading to the formation of a black hole. In addition, paving the way for specific applications of the code, we also present results from fully general relativistic numerical simulations of a system formed by a black hole surrounded by a self-gravitating torus in equilibrium.
Directory of Open Access Journals (Sweden)
Ihsan Yilmaz
2016-01-01
Full Text Available Objectives. To evaluate the visual performance of Toris K soft contact lenses in patients with moderate-to-advanced keratoconus and also to compare the results according to cone types, cone location, and severity of keratoconus. Materials and Methods. Sixty eyes of 40 participants were included in this retrospective study. Uncorrected visual acuity (UCVA, best-spectacle corrected visual acuity (BCVA, best-contact lens corrected visual acuity (BCLCVA, and comfort rating via visual analogue scales (VAS were measured. Results. The mean age was 27.3 ± 8.6 years (range: 18 to 54. The mean logMAR UCVA, BCVA, and BCLCVA were 0.85 ± 0.38 (range: 0.30–1.30, 0.47 ± 0.27 (range: 0.10–1.30, and 0.16 ± 0.20 (range: 0–1.00. There were significant increases in visual acuities with contact lenses (p<.05. BCLCVA was significantly better in oval type than globus type (p=.022. UCVA and BCLCVA were significantly better in moderate keratoconus group (p=.015, p=.018. The mean line gain in Snellen was 3.6 ± 1.8 lines (range: 0–7 lines. The mean line gain was higher in central cone group than paracentral cone group and oval group than globus group (p=.014, p=.045. The mean VAS score was 8.14 ± 1.88 (range: 6–10. Conclusions. Toris K can improve visual acuity of patients with keratoconus. Toris K is successful even in the moderate and advanced form of the disease.
Trova, A; Slany, P; Kovar, J
2016-01-01
We present an analytical approach for the equilibrium of a self-gravitating charged fluid embedded in a spherical gravitational and dipolar magnetic fields produced by a central mass. Our scheme is proposed, as a toy-model, in the context of gaseous/dusty tori surrounding supermassive black holes in galactic nuclei. While the central black hole dominates the gravitational field and it remains electrically neutral, the surrounding material has a non-negligible self-gravitational effect on the torus structure. By charging mechanisms it also acquires non-zero electric charge density, so the two influences need to be taken into account to achieve a self-consistent picture. With our approach we discuss the impact of self-gravity, represented by the term dt (ratio of the torus total mass to the mass of the central body), on the conditions for existence of the equilibrium and the morphology and typology of the tori. By comparison with a previous work without self-gravity, we show that the conditions can be different...
Three-dimensional radiative transfer modeling of AGN dusty tori as a clumpy two-phase medium
Stalevski, Marko; Baes, Maarten; Nakos, Theodoros; Popovic, Luka C
2011-01-01
We investigate the emission of active galactic nuclei (AGN) dusty tori in the infrared domain. Following theoretical predictions coming from hydrodynamical simulations, we model the dusty torus as a 3D two-phase medium with high-density clumps and low-density medium filling the space between the clumps. Spectral energy distributions (SED) and images of the torus at different wavelengths are obtained using 3D Monte Carlo radiative transfer code SKIRT. Our approach of generating clumpy structure allows us to model tori with single clumps, complex structures of merged clumps or interconnected sponge-like structure. A corresponding set of clumps-only models and models with smooth dust distribution is calculated for comparison. We found that dust distribution, optical depth, clump size and their actual arrangement in the innermost region, all have an impact on the shape of near- and mid-infrared SED. The 10 micron silicate feature can be suppressed for some parameters, but models with smooth dust distribution are ...
Directory of Open Access Journals (Sweden)
Mihaela Veţan
2012-10-01
Full Text Available Parteneriatele de solidaritate ASAT sunt dezvoltate în România începând cu anul 2008, în vederea susţinerii micilor producători agricoli care cultivă natural. Dezvoltarea acestora este susţinută la nivel naţional de Asociaţia Centrul de Resurse pentru Iniţiative Eticeși Solidare (CRIES. Mecanismul este unul bazat pe construirea unui relaţii de încredere între producători locali şi consumatori urbani. Astfel,se formează la nivel comunitar grupuri de consumatori care doresc să achiziţioneze produse realizate de mici agricultori, cu care încheie un contract pe perioada unui sezon agricol și cărora le plătesc un avans, în vederea susţinerii costurilor de producţie.
Roger Tory Peterson Inst. of Natural History, Inc., Jamestown, NY.
This report describes a 1989 leadership round-table discussion at the Roger Tory Peterson Institute in New York, which promotes emotional and intellectual linkages between people, especially children, to nature. The document includes the keynote remarks of three speakers along with some administrative guidelines for nature centers. Conservation…
Baldwin, Mark, Comp.; Seaberg, Anita, Comp.
The Roger Tory Peterson Institute's Nature Educators of the Year program recognizes teachers who have successfully implemented education programs that effectively connect children to nature, and that can be replicated by others. Two awards of $1,000 each were given in 1991. One of the recipients, Steven Prchal, is executive director of Sonoran…
X-ray bumps, iron K-alpha lines, and X-ray suppression by obscuring tori in Seyfert galaxies
Krolik, Julian H.; Madau, Piero; Zycki, Piotr T.
1994-01-01
We investigate the X-ray spectral properties of unobscured type 1 and obscured type 2 Seyferts as predicted by the unified Seyfert scheme. We consider the reprocessing of X-ray photons by photoelectric absorption, iron fluorescence, and Compton downscattering in the obscuring tori surrounding these active nuclei, and compute by Monte Carlo methods the reprocessed spectra as a function of the viewing angle. Depending on the optical depth and shape of the torus, and on the viewing angle, the X-ray flux can be suppressed by substantial factors when our line of sight is obscured. We show that an immediate consequence of the existence of an obscuring thick torus is the production in the spectra of type 1 Seyfert galaxies of a bump in the continuum above 10-20 keV and an Fe K-alpha line with significant equivalent width. In those type 2 Seyferts for which the hard X-ray spectrum has been substantially suppressed, the equivalent width of the Fe K-alpha line in the transmitted spectrum can be very large.
GENERALIZED SIMPLE NONCOMMUTATIVE TORI
Institute of Scientific and Technical Information of China (English)
无
2002-01-01
The generalized noncommutative torus Tkp of rank n was defined in [4] by the crossed product noncommutative torus Ap of rank n. It is shown in this paper that Tkp is strongly Morita equivalent to Ap, and that Tkp Mp∞ is isomorphic to Ap Mk(C) Mp∞ if and only if the set of prime factors of k is a subset of the set of prime factors of p.
LENTICULAR NONCOMMUTATIVE TORI
Institute of Scientific and Technical Information of China (English)
无
2003-01-01
All C*-algebras of sections of locally trivial C*-algebra bundles over ∏si=1 Lki (ni)with fibres Aω Mc(C) are constructed, under the assumption that every completely irra-tional noncommutative torus Aω is realized as an inductive limit of circle algebras, whereLki (ni) are lens spaces. Let Lcd be a cd-homogeneous C*-algebra over ∏si=1 Lki (ni) × Tr+2whose cd-homogeneous C*-subalgebra restricted to the subspace Tr × T2 is realized asC(Tr) Al/d Mc(C), and of which no non-trivial matrix algebra can be factored out.The lenticular noncommutative torus Lcd p is defined by twisting C*(Tr+2) C*(Zm-2)in Lcd C*(Zm-2) by a totally skew multiplier ρ on Tr+2 × Zm-2. It is shown thatLcdp Mp∞ is isomorphic to (∏si=1 Lki (ni)) Aρ Mcd(C) Mp∞ if and only if the setof prime factors of cd is a subset of the set of prime factors of p, and that Lcd p is not stablyisomorphic to C(∏si=1 Lki (ni)) Aρ Mcd(C) if the cd-homogeneous C*-subalgebra ofLcdp restricted to some subspace Lki (ni) ∏si=1 Lki (ni) is realized as the crossed productby the obvious non-trivial action of Zki on a cd/ki-homogeneous C*-algebra over S2ni+1 forki an integer greater than 1.
Pesando, Igor
2015-01-01
We consider the simplest possible setting of non abelian twist fields which corresponds to $SU(2)$ monodromies. We first review the theory of hypergeometric function and of the solutions of the most general Fuchsian second order equation with three singularities. Then we solve the problem of writing the general solution with prescribed $U(2)$ monodromies. We use this result to compute the classical string solution corresponding to three $D2$ branes in $R^4$. Despite the fact the configuration is supersymmetric the classical string solution is not holomorphic. Using the equation of motion and not the KLT approach we give a very simple expression for the classical action of the string. We find that the classical action is not proportional to the area of the triangle determined by the branes intersection points since the solution is not holomorphic. Phenomenologically this means that the Yukawa couplings for these supersymmetric configurations on non factorized tori are suppressed with respect to the factorized ...
Kishimoto, M.; Hönig, S. F.; Beckert, T.; Weigelt, G.
2007-12-01
Spatially resolving the innermost region of the putative torus-like structure in an active galactic nucleus (AGN) is one of the main goals of high-spatial-resolution studies. This could be done in the near-IR observations of type 1 AGNs where we directly see the hottest dust grains in the torus. We discuss two critical issues in such studies. One is the possible contribution from the central putative accretion disk (the near-IR part of the big blue bump emission), which should be taken into account for the torus measurements. The other is the expected size of the inner boundary of the torus, essential for the feasibility of spatially resolving the region. We examine the nuclear near-IR point sources in the HST/NICMOS images of nearby type 1 AGNs to evaluate the accretion disk contribution. After the subtraction of the host bulge flux through two-dimensional decompositions, we show that near-IR colors of the point sources appear quite interpretable simply as a composite of a black-body-like spectrum and a relatively blue distinct component, as expected for a torus and an accretion disk in the near-IR. The near-IR colors of our radiative transfer models for clumpy tori also support this simple two-component interpretation. The observed near-IR colors for the available sample suggest a fractional accretion disk contribution of ~25% or less at 2.2 μm. We also show that the innermost torus radii as indicated by recent near-IR reverberation measurements are systematically smaller by a factor of ~3 than the predicted dust sublimation radius with a reasonable assumption for graphite grains of a sublimation temperature 1500 K and size 0.05 μm in radius. The discrepancy might indicate a much higher sublimation temperature or a typical grain size much larger in the innermost tori, though the former case appears to be disfavored by the observed colors of the HST point sources studied above. Alternatively, the central engine radiation might be significantly anisotropic. The
Pesando, Igor
2016-09-01
We consider the simplest possible setting of non-abelian twist fields which corresponds to SU (2) monodromies. We first review the theory of hypergeometric function and of the solutions of the most general Fuchsian second order equation with three singularities. Then we solve the problem of writing the general solution with prescribed U (2) monodromies. We use this result to compute the classical string solution corresponding to three D2 branes in R4. Despite the fact that the configuration is supersymmetric the classical string solution is not holomorphic. Using the equation of motion and not the KLT approach we give a very simple expression for the classical action of the string. We find that the classical action is not proportional to the area of the triangle determined by the branes intersection points since the solution is not holomorphic. Phenomenologically this means that the Yukawa couplings for these supersymmetric configurations on non-factorized tori are suppressed with respect to the factorized case.
Kishimoto, Makoto; Beckert, Thomas; Weigelt, Gerd
2007-01-01
Spatially resolving the innermost torus in AGN is one of the main goals of its high-spatial-resolution studies. This could be done in the near-IR observations of Type 1 AGNs where we see directly the hottest dust grains in the torus. We discuss two critical issues in such studies. Firstly, we examine the nuclear point sources in the HST/NICMOS images of nearby Type 1 AGNs, to evaluate the possible contribution from the central putative accretion disk. After a careful subtraction of host bulge flux, we show that near-IR colors of the point sources appear quite interpretable simply as a composite of a black-body-like spectrum and a relatively blue distinct component as expected for a torus and an accretion disk, respectively. Our radiative transfer models for clumpy tori also support this simple two-component interpretation. The observed near-IR colors suggest a fractional accretion disk contribution of ~25% or less at 2.2 micron. Secondly, we show that the innermost torus radii as indicated by the recent near-...
Design To Manufacturing Process:Bumpy Road?
Institute of Scientific and Technical Information of China (English)
2012-01-01
Ntegration between design and manufacturing is one of the topics that normally hits a lot of discussion in the product development and PLM space.To support this process becomes more and more important in a modern enterprise manufacturing organization.You can ask me why? Let me put is simple this is one of the most important processes that can drive cost optimization in the companies.Everything a company is making need to be first designed and later manufacturing.If it breaks nothing can help.
Bumpy Power Spectra and Galaxy Clusters
Knebe, A; Silk, J; Knebe, Alexander; Islam, Ranty; Silk, Joseph
2001-01-01
The evolution of the abundance of galaxy clusters is not a reliable measure of Omega if there are features on scales of a few Mpc in the primordial power spectrum. Conversely, if we know the cosmological model parameters from other measurements, the cluster abundance evolution permits us to probe features in the power spectrum that are in the nonlinear regime at the present epoch, and hence difficult to discern directly from current epoch measurements. We have investigated the influence of an artificially introduced Gaussian feature on an otherwise unperturbed SCDM power spectrum. Using these modified spectra as an input to cosmological N-body simulations, we are able to show that in terms of the cluster abundance evolution, a SCDM model displays characteristics similar to an OCDM model. However, strong modifications would also be visible at a redshift z=0 in the dark matter power spectrum whereas minor alterations to the usual SCDM spectrum are washed away by non-linear evolution effects. We therefore conclu...
Prokhorenko, V. I.
2016-03-01
The paper discusses the problems of the choice of high-apogee orbits of artificial Earth satellites (AES), proceeding from the tasks of space experiments aimed at studying near-earth space and taking into account the features of the orbital evolution and ballistic lifetime. The suggested methods of the choice of orbits consist of two components. The first is based on the use of mathematical models of studied regions of near-earth space and various techniques of situation analysis, among which the annual and daily orbital tori developed by the author about 35 years ago are key. The second component is based on qualitative methods of the theory of perturbations of high-apogee AES orbits developed by M.L. Lidov more than 50 years ago.
Self-consistent stellar dynamical tori
Ciotti, L; Londrillo, P
2003-01-01
We present preliminary results on a new family of distribution functions that are able to generate axisymmetric, truncated (i.e., finite size) stellar dynamical models characterized by toroidal shapes. The relevant distribution functions generalize those that are known to describe polytropic spheres, for which all the dynamical and structural properties of the system can be expressed in explicit form as elementary functions of the system gravitational potential. The model construction is then completed by a numerical study of the associated Poisson equation. We note that our axisymmetric models can also include the presence of an external gravitational field, such as that produced by a massive disk or by a central mass concentration (e.g., a supermassive black hole).
Stochastic Orbit Prediction Using KAM Tori
2011-03-24
central body (like the rings of Saturn ), or coalesce into a moon or planet. Hannes Alfvén famously described this coalescing of debris using apples... texts supplant this element with specific angular momentum, h, or the semilatus rectum, p, since the semimajor axis is infinite for parabolic orbits...magnitude [27:137]. Therefore, the disturbing function, R2, is approximated by the J2 term alone. See Wiesel [27:137] for its full glorious form. After
Equivalence Bimodule between Spherical Noncommutative Tori
Institute of Scientific and Technical Information of China (English)
Chun Gil PARK
2003-01-01
Let ni,mj ＞ 1. In [5], the spherical noncommutative torus Sppd was defined by twisting Tr+2 × Zl in Tpd C*(Zl) by a totally skew multiplier p on Tr+2 × Zl for Tpd a pd-homogeneous C*-algebra over Пs4i＝1 S2n+I ×Пs2 S2 ×Пs3j＝1 S2mj-1 ×Пs1 S1 × Tr+2. It is shown that Sppd is strongly Morita equivalent to C(Пs4i＝1 S2ni ×Пs2S2×Пs3j＝1 S2mj-1 ×Пs1 S1) C*(Tr+3× Zl, p).
Nambu quantum mechanics on discrete 3-tori
Energy Technology Data Exchange (ETDEWEB)
Axenides, M [National Research Center ' Demokritos' , 15310 Aghia Paraskevi, Athens (Greece); Floratos, E G [Nuclear and Particle Physics Section, University of Athens, 15771 Athens (Greece); Nicolis, S [CNRS-Laboratoire de Mathematiques et Physique Theorique (UMR 6083) Federation Denis Poisson (FR 9164) Universite de Tours ' Francois Rabelais' , Parc Grandmont, 37200 Tours (France)], E-mail: axenides@inp.demokritos.gr, E-mail: mflorato@physics.uoa.gr, E-mail: Stam.Nicolis@lmpt.univ-tours.fr
2009-07-10
We propose a quantization of linear, volume preserving, maps on the discrete and finite 3-torus T{sub N}{sup 3} represented by elements of the group SL(3,Z{sub N}). These flows can be considered as special motions of the Nambu dynamics (linear Nambu flows) in the three-dimensional toroidal phase space and are characterized by invariant vectors a of T{sub N}{sup 3}. We quantize all such flows, which are necessarily restricted on a planar two-dimensional phase space, embedded in the 3-torus, transverse to the vector a. The corresponding maps belong to the little group of a element of SL(3,Z{sub N}), which is an SL(2,Z{sub N}) subgroup. The associated linear Nambu maps are generated by a pair of linear and quadratic Hamiltonians (Clebsch-Monge potentials of the flow) and the corresponding quantum maps realize the metaplectic representation of SL(3,Z{sub N}) on the discrete group of three-dimensional magnetic translations, i.e. the non-commutative 3-torus with a deformation parameter the Nth root of unity. Other potential applications of our construction are related to the quantization of deterministic chaos in turbulent maps as well as to quantum tomography of three-dimensional objects.
Invariant Tori and Boundedness in Asymmetric Oscillations
Institute of Scientific and Technical Information of China (English)
Xin Ping WANG
2003-01-01
In this paper, we are concerned with the boundedness of all the solutions of the equation(x" + ax+ - bx- + φ(x) = p(t)),where p(t) is a smooth 2π-periodic function, a and b are positive constants, and the perturbation φ(x)is bounded.
TRANSIT OF EXOMOON PLASMA TORI: NEW DIAGNOSIS
Energy Technology Data Exchange (ETDEWEB)
Ben-Jaffel, Lotfi [UPMC, University of Paris 06, UMR 7095, Institut d' Astrophysique de Paris, F-75014 Paris (France); Ballester, Gilda E., E-mail: bjaffel@iap.fr, E-mail: gilda@pirl.lpl.arizona.edu [Lunar and Planetary Laboratory, University of Arizona, 1541 E. University Blvd, Tucson, AZ 85721-0063 (United States)
2014-04-20
In the solar system, moons largely exceed planets in number. The Kepler database has been shown to be sensitive to exomoon detection down to the mass of Mars, but the first search has been unsuccessful. Here, we use a particles-in-cell code to predict the transit of the plasma torus produced by a satellite. Despite the small size of a moon, the spatial extent of its plasma torus can be large enough to produce substantial transit absorptions. The model is used for the interpretation of Hubble Space Telescope early ingress absorptions apparently observed during the WASP-12 b and HD 189733 b UV transits for which no consistent explanation exists. For HD 189733 b an exomoon transiting ∼16 R{sub p} ahead of the planet and loading ∼10{sup 29} C II ions s{sup –1} into space is required to explain the tentative early ingress absorption observed for C II. For WASP-12b, a moon transiting ∼6 R{sub p} ahead from the planet and ejecting ∼10{sup 28} Mg II ions per second is required to explain the NUV early ingress absorption feature. Interestingly, both HD 189733 b and WASP-12b predicted satellites are outside the Hill sphere of their planets, an indication that the moons, if present, were not formed in situ but probably captured later. Finally, our simulations show a strong electromagnetic coupling between the polar regions of planets and the orbital position of the moons, an expected outcome of the unipolar induction DC circuit model. Future observations should test our predictions with a potential opportunity to unambiguously detect the first exomoon plasma torus.
Transit of Exomoon Plasma Tori: New Diagnosis
Ben-Jaffel, Lotfi
2014-01-01
In the solar system, moons largely exceed planets in number. The Kepler database has been shown to be sensitive to exomoon detection down to the mass of Mars, but the first search has been unsuccessful. Here, we use a particles-in-cell code to predict the transit of the plasma torus produced by a satellite. Despite the small size of a moon, the spatial extent of its plasma torus can be large enough to produce substantial transit absorptions. The model is used for the interpretation of Hubble Space Telescope early ingress absorptions apparently observed during WASP-12b and HD 189733b UV transits for which no consistent explanation exists. For HD 189733b an exomoon transiting $\\sim 16$ $R_p$ ahead of the planet and loading $\\sim 10^{29}$ C II ions/s into space is required to explain the tentative early ingress absorption observed for C II. For WASP-12b, a moon transiting $\\sim 6$ $R_p$ ahead from the planet and ejecting $\\sim 10^{28}$ Mg II ions per second is required to explain the NUV early ingress absorption...
Effective Height Upper Bounds on Algebraic Tori
Habegger, Philipp
2012-01-01
The main emphasis will be on height upper bounds in the algebraic torus G^{n}_{m}. By height we will mean the absolute logarithmic Weil height. Section 3.2 contains a precise definition of this and other more general height functions. The first appendix gives a short overview of known results in the abelian case. The second appendix contains a few height bounds in Shimura varieties.
The Bumpy Road to Mother Tongue Instruction in Malawi
Kamwendo, Gregory Hankoni
2008-01-01
In 1996, the Ministry of Education in Malawi directed that in future Standards 1 to 4 would be taught through mother tongues. It took eight years before the pilot phase of the language policy could begin. The paper critically analyses this situation using Bamgbose's framework which says that, in Africa, language policies tend to follow one or more…
A successful international cooperation with a bumpy start
Institute of Scientific and Technical Information of China (English)
Ming Li
2011-01-01
Science has no boarders.The saying could not be more accurate in the case of infectious disease research.It is publicly known that infectious diseases can travel,not only through infected people,animals or insects,but also by commercial shipments.In the era of globalization,it is not possible to fight infectious diseases in one nation without worrying about what is happening elsewhere in the world.Emerging and re-emerging infectious diseases such as the outbreak of SARS in 2003 are likely to panic the Asian society at any time.To fight these diseases,the Chinese Academy of Sciences (CAS) and the University of Tokyo (UT) launched China-Japan Collaboration on Emerging and Re-emerging Infectious Diseases in 2005,as part of the Program of Founding Research Centers for Emerging and Re-emerging Infectious Diseases supported by Japan Ministry of Education,Science,Sports and Technology (MEXT).
Scare of Avian Flu Revisits India: A Bumpy Road Ahead
Directory of Open Access Journals (Sweden)
Rajnish Kumar Rai
2008-04-01
Full Text Available With the threat of an avian flu pandemic once again looming over eastern India, issues regarding patents and affordability and accessibility of drugs have taken center stage. The key priority of India should be to remain prepared to address the public health crisis effectively, by stockpiling the drug tamiflu so that it can be easily distributed and administered to the needy.India had been confronted with a serious threat of avian flu in 2005-06, but past experience shows that, despite having some of the broadest and most comprehensive compulsory patent licensing laws, India's policymaking elite shied away from fully exploiting these legal 'flexibilities.' Fortunately, the danger of avian flu did not turn into a substantial public health crisis that year. Under this backdrop, this paper explores various ‘flexibilities’ available in the Indian patent law and suggests short term and long term strategies to effectively tackle the impending danger of an avian flu pandemic, and similar public health crises in future. This paper will discuss potential areas of conflict between the indigenous generic drug firms and the multi-national companies with respect to TRIPS compliance in the event that these flexibilities are exploited. This paper also highlights the administrative constraints and the economic viability of the compulsory licensing system. Finally, this paper shows how political will is often more critical than having well documented provisions in statute books to respond to such situations effectively.
The Long, Bumpy Road to a Mars Aeronomy Mission (Invited)
Grebowsky, J. M.; Luhmann, J. G.; Bougher, S. W.; Jakosky, B. M.
2013-12-01
With the advent of the space age, early focus was put into characterizing the Earth's upper atmosphere with aeronomy missions. These missions were designed to study the upper atmosphere region of a planet where the ionosphere is produced with particular attention given to the composition, properties and motion of atmosphere constituents. In particular a very successful US series of Atmosphere Explorer aeronomy spacecraft (1963-1977) was implemented. This upper atmosphere region is the envelope that all energy from the sun must penetrate and is recognized as an inseparable part of a planet's entire atmosphere. Venus was the next planet to have its upper atmosphere/ionosphere deeply probed via the Pioneer Venus Orbiter (1978-1986) that carried a complement of instruments similar to some flown on the Atmosphere Explorers. The planet which humans have long set their imagination on, Mars, has yet to be subjected to the same detailed upper atmosphere perusal until now, with MAVEN. Not that attempts have been wanting. More than 30 spacecraft launches to Mars were attempted, but half were not successful and those that attained orbit came far short of attaining the same level of knowledge of the Martian upper atmosphere. Other countries had planned Mars aeronomy missions that didn't bear fruit - e.g. Mars-96 and Nozomi and the US did studies for two missions, Mars Aeronomy Orbiter and MUADEE, that never were implemented. This is about to change. NASA's Scout Program singled out two aeronomy missions in its final competition and the selected mission, MAVEN, will fly with the needed sophistication of instruments to finally probe and understand the top of Mars' atmosphere. Was this late selection of a NASA aeronomy mission to Mars a philosophy change in US priorities or was it an accident of planning and budget constraints? Was it driven by the developing knowledge that Mars really had an early atmosphere environment conducive to life and that an aeronomy mission is indeed needed to determine where and how fast the life-capable atmosphere disappeared. Or was it thought that other orbiting missions like MEx or MGS that sampled the ionosphere were inadequate to the task? In a way the delay in executing a Mars aeronomy mission has a positive side; i.e. instruments are better developed than in earlier proposals and we have the benefit of MEx and MGS better defining the science objectives for an aeronomy mission. The bumps and potholes that planners of missions to Mars encountered makes an interesting story
Entropy production, viscosity bounds and bumpy black holes
Hartnoll, Sean; Ramirez, David; Santos, Jorge
2016-01-01
The ratio of shear viscosity to entropy density, $\\eta/s$, is computed in various holographic geometries that break translation invariance (but are isotropic). The shear viscosity does not have a hydrodynamic interpretation in such backgrounds, but does quantify the rate of entropy production due to a strain. Fluctuations of the metric components $\\delta g_{xy}$ are massive about these backgrounds, leading to $\\eta/s < 1/(4\\pi)$ at all finite temperatures (even in Einstein gravity). As the te...
Bumpy, Sticky, and Shaky: Nanoscale Science and the Curriculum
Taylor, Amy; Jones, Gail; Pearl, Thomas P.
2008-01-01
Nanoscience, or the study of the world at the size of a billionth of a meter, has the potential to help students see how all of the sciences are related. Behavior of materials at the nanoscale differs from materials at the macroscale. This article introduces three nanoscale properties and how they relate to various science domains. Three…
Compression fractures of the vertebrae during a "bumpy" boat ride.
LENUS (Irish Health Repository)
Chukwunyerenwa, C K
2012-01-31
INTRODUCTION: Compression fracture of the vertebrae is common, often the result of falls from height and motor vehicle accidents in the younger age groups. It can occur following minor trauma in the elderly and in those with osteoporosis. MATERIALS AND METHODS: We present an interesting case of compression fracture of the vertebral bodies occurring simultaneously in a couple during a boat ride while on holiday. One individual had fracture of the T8, while the other fractured the L1 vertebrae. Both injuries were treated conservatively with Taylor braces. CONCLUSION: We highlight one of the potential hazards of this recreational activity, and the almost identical fracture pattern in this couple.
Alternative approaches to plasma confinement
Roth, J. R.
1978-01-01
The paper discusses 20 plasma confinement schemes each representing an alternative to the tokamak fusion reactor. Attention is given to: (1) tokamak-like devices (TORMAC, Topolotron, and the Extrap concept), (2) stellarator-like devices (Torsatron and twisted-coil stellarators), (3) mirror machines (Astron and reversed-field devices, the 2XII B experiment, laser-heated solenoids, the LITE experiment, the Kaktus-Surmac concept), (4) bumpy tori (hot electron bumpy torus, toroidal minimum-B configurations), (5) electrostatically assisted confinement (electrostatically stuffed cusps and mirrors, electrostatically assisted toroidal confinement), (6) the Migma concept, and (7) wall-confined plasmas. The plasma parameters of the devices are presented and the advantages and disadvantages of each are listed.
Multilayered tori in a system of two coupled logistic maps
DEFF Research Database (Denmark)
Zhusubaliyev, Zhanybai; Mosekilde, Erik
2009-01-01
of two coupled logistic maps through period-doubling or pitchfork bifurcations of the saddle cycle on an ordinary resonance torus. We hereafter present two different scenarios by which a multilayered torus can be destructed. One scenario involves a cascade of period-doubling bifurcations of both...
Classification and equivalences of noncommutative tori and quantum lens spaces
Venselaar, J.J.
2012-01-01
In noncommutative geometry, one studies abstract spaces through their, possibly noncommutative, algebras of continuous functions. Through these function algebras, and certain operators interacting with them, one can derive much geometrical information of the underlying space, even though this space
Clifford algebras, noncommutative tori and universal quantum computers
Vlasov, A Yu
2001-01-01
Recently author suggested [quant-ph/0010071] an application of Clifford algebras for construction of a "compiler" for universal binary quantum computer together with later development [quant-ph/0012009] of the similar idea for a non-binary base. The non-binary case is related with application of some extension of idea of Clifford algebras. It is noncommutative torus defined by polynomial algebraic relations of order l. For l=2 it coincides with definition of Clifford algebra. Here is presented the joint consideration and comparison of both cases together with some discussion on possible physical consequences.
Teerullitaktika kasutamisest riigieelarve arutamisel aastail 1998-2005 / Erkki Tori
Tori, Erkki
2007-01-01
Autor analüüsib Riigikogu nelja koosseisu kogemusi riigieelarve menetlemisel ning jõuab järeldusele, et valitsuskoalitsioonid on kasutanud teerullitaktikat ning teeb selle vähendamiseks ettepaneku muuta menetlusreeglistikku. Tabelid: 1998-2005. aasta riigieelarvesse esitatud ettepanekute edukus. Diagrammid, graafikud
Orbital Tori Construction Using Trajectory Following Spectral Methods
2010-09-01
as it will be.” – Isaac Asimov For those with a little white near the temples (and especially to those with a lot), transformation is not a new concept...1989. [5] Asimov , Isaac . “Quotes: Pithy Sayings for the New World of Work”. URL http://www.thephoenixprinciple.com/quotes/2004/11...battlefield conditions. Isaac Asimov’s quote about change [5], which is nearly identical to that made by Heraclitus almost 2,000 years prior, embodies the
Webs of Lagrangian Tori in Projective Symplectic Manifolds
Hwang, Jun-Muk
2012-01-01
For a Lagrangian torus A in a simply-connected projective symplectic manifold M, we prove that M has a hypersurface disjoint from a deformation of A. This implies that a Lagrangian torus in a compact hyperk\\"ahler manifold is a fiber of an almost holomorphic Lagrangian fibration, giving an affirmative answer to a question of Beauville's. Our proof employs two different tools: the theory of action-angle variables for algebraically completely integrable Hamiltonian systems and Wielandt's theory of subnormal subgroups.
Trace spaces of directed tori with rectangular holes
DEFF Research Database (Denmark)
Fajstrup, Lisbeth
In [4] the trace space of parallel non-looped, non-branching processes is given as a prod-simplicial complex derived from an index category. For looped processes, the state space is a torus and the trace space is a disjoint union of tracespaces of deloopings. The index category for the trace space...... of the deloopings is developed from the once delooped case. When just one process is looped, the index category is generated as words in a regular language. The automaton is constructed....
Trace spaces of directed tori with rectangular holes
DEFF Research Database (Denmark)
Fajstrup, Lisbeth
2014-01-01
Raussen (2010) gave the trace space, which corresponds to the executions of parallel non-looped, non-branching processes as a prod-simplicial complex derived from a poset. The connected components represent equivalent executions. For looped processes, the state space is a torus and the trace space...... is a disjoint union of trace spaces of deloopings. In the current paper, we develop the index poset for the trace space of the deloopings from the once delooped case. When just one process is looped, the index poset is generated as words in a regular language. We also construct a corresponding automaton....
Parsec-Scale Jets and Tori in Seyfert Galaxies
Roy, A L; Wilson, A S; Ulvestad, J S; Norris, R P; Mundell, C G; Krichbaum, T P; Falcke, H; Colbert, E J M
2000-01-01
What causes the dichotomy between very powerful and very weak radio emission from AGNs? Perhaps the engines are the same but the jets get disrupted by dense ISM in radio-quiet objects, or else the engines are intrinsically different with jet power scaling with, say, black hole spin. To distinguish, one can look for interaction between the jets and the NLR and measure the jet speed close to the core using VLBI, before environmental effects become important. We find that in radio-quiet AGN, the jets appear slower and have a greater tendency to bend, and that one-sidedness and flat-spectrum cores are probably due to obscuration.
Modelling Jets, Tori and Flares in Pulsar Wind Nebulae
Porth, Oliver; Buehler, Rolf; Olmi, Barbara; Komissarov, Serguei; Lamberts, Astrid; Amato, Elena; Yuan, Yajie; Rudy, Alexander
2017-03-01
In this contribution we review the recent progress in the modelling of Pulsar Wind Nebulae (PWN). We start with a brief overview of the relevant physical processes in the magnetosphere, the wind-zone and the inflated nebula bubble. Radiative signatures and particle transport processes obtained from 3D simulations of PWN are discussed in the context of optical and X-ray observations. We then proceed to consider particle acceleration in PWN and elaborate on what can be learned about the particle acceleration from the dynamical structures called GwispsG observed in the Crab nebula. We also discuss recent observational and theoretical results of gamma-ray flares and the inner knot of the Crab nebula, which had been proposed as the emission site of the flares. We extend the discussion to GeV flares from binary systems in which the pulsar wind interacts with the stellar wind from a companion star. The chapter concludes with a discussion of solved and unsolved problems posed by PWN.
Precession of Toroidally Passing Particles in Tokamaks and Spherical Tori
Energy Technology Data Exchange (ETDEWEB)
Ya.I. Kolesnichenko; R.B.White; Yu.V. Yakovenko
2003-01-30
The toroidal precession of the well-circulating particles and particles that are passing toroidally but trapped poloidally is studied. Expressions for the precession frequency, which are convenient for practical use, are obtained and analyzed. It is found that the key parameters that determine the magnitude and the direction of the precession velocity are the plasma elongation, the magnitudes and profiles of the safety factor and beta defined as the ratio of the local plasma pressure to the magnetic field pressure at the magnetic axis. An important role of the ''paramagnetic'' precession in highly elongated plasmas is revealed. The analysis carried out is based on the obtained expressions for the equilibrium magnetic field strength and the field line curvature.
Ideal Triangulations of Pseudo-Anosov Mapping Tori
Agol, Ian
2010-01-01
We show how to construct an ideal triangulation of a mapping torus of a pseudo-Anosov map punctured along the singular fibers. This gives rise to a new conjugacy invariant of mapping classes, and a new proof of a theorem of Farb-Leininger-Margalit. The approach in this paper is based on ideas of Hamenstadt.
Field Marks of a Celebration: Roger Tory Peterson's Centennial Birthday
Dunlap, J.; Robbins, C.S.
2008-01-01
A red letter day in my life was April 27, 1934, the day I first met Roger. A birding friend, Elisha Atkins, had invited Clinton Reynolds and me to dinner to meet a famous ornithologist. We would all be going on a field trip to Newburyport on the Massachusetts coast the next day. The dinner conversation revolved about a new field guide that Mr. Peterson had just completed and that would be available in a few days. I couldn?t wait to see it! I had been birding since 1930, keying out live birds with Chapman?s Handbook of Birds of Eastern North America (1912) and Hoffman?s Guide to the Birds of New England and Eastern New York (1904). Both books had extensive keys based on color, size, bill shape and season, and pictures of heads or feet of some species. Positive bird identification was a long and tedious process. The field trip the next day with Roger was memorable, not for finding any rare or unusual birds, but for learning how to identify birds to species at a single good glance. I recall asking Roger if he could find a ring-billed gull among a group of gulls resting on a roof beside the Merrimac River. He immediately said, ?No there aren?t any ring-bills there; they would be immediately apparent by their slimmer shape.? There was no need to check the foot color on each bird. While it is easy to say that Roger revolutionized field guides, I truly believe there are few people worldwide under the age of 90 who can really appreciate the difference between the old way of keying out birds and the instant recognition promoted by the Peterson system. Today we take for granted that amateurs can identify birds accurately. Monitoring bird populations by Breeding Bird Surveys, atlas studies, Breeding Bird Censuses, migration banding, and many other studies relies on it. None of these would be possible if we were still keying out live birds using books designed to identify dead birds in the hand.
Quasi linear flows on tori regularity of their linearization
Bonetto, F; Gentile, G; Mastropietro, V; Bonetto, Federico; Gallavotti, Giovanni; Gentile, Guido; Mastropietro, Vieri
1996-01-01
Under suitable conditions a flow on a torus C^{(p)}--close, with p large enough, to a quasi periodic diophantine rotation is shown to be conjugated to the quasi periodic rotation by a map that is analytic in the perturbation size. This result is parallel to Moser's theorem stating conjugability in class C^{(p')} for some p'
On slope genera of knotted tori in the 4-space
Liu, Yi; Sun, Hongbin; Wang, Shicheng
2011-01-01
In this note, we investigate genera for the slopes of a knotted torus in the 4-sphere analogous to the genus of a classical knot. We compare various formulations of this notion, and use this notion to study the extendable subgroup of the mapping class group of the knotted torus.
Five years on the bumpy road delivering well chemicals for zero harmful discharge
Energy Technology Data Exchange (ETDEWEB)
Selle, Olav M.; Paltiel, Sten; Saeten, Jens O.; Nasvik, Haavard
2006-03-15
This is a summary of five years development work to qualify environmentally acceptable well chemicals for Heidrun. We will describe the situation as we started the work, what strategy we followed and the ups and downs we experienced as we went along. The focus is on scale inhibitors, scale dissolvers, acid formulations, viscosified fluids and chemicals for zonal isolation/shut-off purposes. The challenge has been to develop biodegradable and low toxic chemicals with equal or better effectiveness and with a reasonable prize compare to {sup b}est in class{sup -}products. The impact this has provided for zero harmful discharge to sea at Haltenbanken will be presented, to show the status as we are entering into year 2005. (Author)
Directory of Open Access Journals (Sweden)
M R Sreenivasa Murthy
2013-12-01
Full Text Available Genomics, a new bough of biotechnology responsible for gene mapping has acquired a rapid significance in the field of patents. Brisk growth of patent filing in genomic subject matter is raising serious concerns about their utility from the perspective of societal benefit. Though the genomic related patent application qualifies the criterion of invention and non-obviousness in major instances, the inventors are unable to satisfy the utility criterion. Some instances such as patent application for ESTs have no utility at all. The patent regulators constructed various tests to deal with the situation such as specificity, substantiality (real world credibility tests etc. Hoverer, it is noteworthy that an attempt to uniform the standard of utility test for genomic inventions especially in the field of ESTs, cloning and creation of chimeras, has been made by America and Europe through specific regulations. Thus, the objective of this paper is firstly, to explain the importance of biotechnology and genomic inventions for mankind and significance of ESTs for future research. Secondly, to analyze the application of Utility code prior to the emergence of Utility code in America and Europe. Thirdly to scrutinize the Utility code in both countries and their implication on aftermath cases, and. fourthly and finally, to critically evaluate the both countries utility pathways in the light of societal benefit.
The Bumpy Road toward Low-Energy Urban Mobility: Case Studies from Two UK Cities
Directory of Open Access Journals (Sweden)
Tim Schwanen
2015-06-01
Full Text Available Cities are increasingly seen as the places where innovations that can trigger a sociotechnical transition toward urban mobility are emerging and maturing. Processes such as peak car, rail renaissance and cycling boom manifest themselves particularly in cities, and success stories of cities experimenting with specific types of low-energy mobility abound in the academic literature. Nonetheless, innovation is known to be a precarious process requiring favorable circumstances. Using document analysis and in-depth interviews, this study examines the nature of low-energy innovation in the everyday mobility of people in two UK cities with favorable conditions for a transition away from fossil fuels—Brighton and Oxford. It shows that clear differences exist between the two cities in the sorts of innovation that emerge and diffuse as a result of path dependencies, local politics, and financial support from supra-local governments and agencies. While low-energy mobility currently has substantial momentum in both cities, the majority of low-carbon innovations in urban mobility are incremental rather than radical in nature, and their future is often imbued with uncertainty. The autonomy of small- and medium-sized cities as agents in bringing about transformational change toward low-energy urban mobility should not be overestimated.
Actually the World Is Quite Bumpy: Using Friedman in the International Business Law Classroom
Dhooge, Lucien J.
2006-01-01
In "The World Is Flat: A Brief History of the Twenty-First Century," Pulitzer Prize recipient and New York Times foreign affairs correspondent Thomas L. Friedman examines the evolution of globalization in the six years since the publication of his highly acclaimed introduction to the topic in "The Lexus and the Olive Tree: Understanding…
Damoiseaux, Jan; von Mühlen, Carlos A; Garcia-De La Torre, Ignacio; Carballo, Orlando Gabriel; de Melo Cruvinel, Wilson; Francescantonio, Paulo Luiz Carvalho; Fritzler, Marvin J; Herold, Manfred; Mimori, Tsuneyo; Satoh, Minoru; Andrade, Luis E C; Chan, Edward K L; Conrad, Karsten
2016-12-01
The International Consensus on ANA Patterns (ICAP) was initiated as a workshop aiming to thoroughly discuss and achieve consensus regarding the morphological patterns observed in the indirect immunofluorescence assay on HEp-2 cells. One of the topics discussed at the second ICAP workshop, and addressed in this paper, was the harmonization of reporting ANA test results. This discussion centered on the issue if cytoplasmic and mitotic patterns should be reported as positive or negative. This report outlines the issues that impact on two major different reporting methods. Although it was appreciated by all participants that cytoplasmic and mitotic patterns are clinically relevant, implications for existing diagnostic/classification criteria for ANA-associated diseases in particular hampered a final consensus on this topic. Evidently, a more concerted action of all relevant stakeholders is required. Future ICAP workshops may help to facilitate this action.
The bumpy road Max Planck from radiation theory to the quantum (1896-1906)
Badino, Massimiliano
2015-01-01
This book examines the different areas of knowledge, traditions, and conceptual resources that contributed to the building of Max Planck’s theory of radiation. It presents an insightful comparative analysis that not only sheds light upon a fundamental chapter in the history of modern physics, but also enlarges our understanding of how theoreticians work. Coverage offers a deep investigation into the technical aspects behind the theory and extends in time the notion of quantum revolution. It also presents a full-fledged discussion of the combinatorial part of Planck’s theory and places emphasis on the epistemological role of mathematical practices. By painstakingly reconstructing both the electromagnetic and the combinatorial part of Planck’s black-body theory, the author shows how some apparently merely technical resources, such as the Fourier series, effectively contributed to shape the final form of Planck’s theory. For decades, historians have debated the conditions of possibility of Max Planck’s...
Fusion energy division annual progress report, period ending December 31, 1980
Energy Technology Data Exchange (ETDEWEB)
1981-11-01
The ORNL Program encompasses most aspects of magnetic fusion research including research on two magnetic confinement programs (tokamaks and ELMO bumpy tori); the development of the essential technologies for plasma heating, fueling, superconducting magnets, and materials; the development of diagnostics; the development of atomic physics and radiation effect data bases; the assessment of the environmental impact of magnetic fusion; the physics and engineering of present-generation devices; and the design of future devices. The integration of all of these activities into one program is a major factor in the success of each activity. An excellent example of this integration is the extremely successful application of neutral injection heating systems developed at ORNL to tokamaks both in the Fusion Energy Division and at Princeton Plasma Physics Laboratory (PPPL). The goal of the ORNL Fusion Program is to maintain this balance between plasma confinement, technology, and engineering activities.
A Rough & Bumpy Way in Post- Cancun Era%后坎昆时代路途坎坷
Institute of Scientific and Technical Information of China (English)
无
2004-01-01
我驻新加坡、哥伦比亚、韩国使馆经商处综合消息8月1日凌晨，世贸组织的147个成员终于在瑞士日内瓦达成一项框架协议，重振陷入僵局的多哈回合多边贸易谈判。消息传出后，各国对此反应不一。
Roth, J. R.
1977-01-01
The degree of toroidal symmetry of the plasma, the number of midplane electrode rings, the configuration of electrode rings, and the location of the diagnostic instruments with respect to the electrode rings used to generate the plasma are discussed. Impurities were deliberately introduced into the plasma, and the effects of the impurity fraction on ion kinetic temperature and electron number density were observed. It is concluded that, if necessary precautions are taken, the plasma communicates extremely well along the magnetic field lines and displays a high degree of symmetry from sector to sector for a wide range of electrode ring configurations and operating conditions. Finally, some characteristic data taken under nonoptimized conditions are presented, which include the highest electron number density and the longest particle containment time (1.9 msec) observed. Also, evidence from a paired comparison test is presented which shows that the electric field acting along the minor radius of the toroidal plasma improves the plasma density and the calculated containment time more than an order of magnitude if the electric field points inward, relative to the values observed when it points (and pushes ions) radially outward.
Dentoni, D.; Lu, J.; English, F.; McBride, R.
2012-01-01
The case of the Australian Southern Rock Lobster Association describes real issues faced by the Market Development Manager of a collective agri-food organization (SRL) representing all the southern rock lobster fishermen in Victoria, South Australia and Tasmania. The case deals with recent globaliza
Energy Technology Data Exchange (ETDEWEB)
Ackerman, S.
1982-02-26
During Title I, General Dynamics' principal role as a subcontractor to the McDonnell Douglas Astronautics Company (MDAC) is to assist in the further development of a low-cost superconducting magnet mirror coil system for the EBT-P program consistent with long life and dependable operation. The activity can best be defined as an extension of ORNL's previous development program with further joint ORNL/MDAC/GDC refining of the mirror coil components. MDAC/GDC participation for the entire program can be subdivided into four distinct elements as follows: (1) design, development, and fabrication of two dewar subassemblies to enclose the ORNL developed and fabricated cold mass assemblies; (2) design, development, and fabrication of a production prototype magnet system including conductor (procurement), cold mass components, dewar and x-ray shield. This prototype would form the basis for the production of 36 magnets for the torus and three spares. (3) design, development, and fabrication of an electrical/electronic system including quench protection, instrumentation and control, and power supply to power and protect the mirror coil system during its operation in the torus; (4) fabrication of the 39 production magnets.
Directory of Open Access Journals (Sweden)
Kim Vancampenhout
Full Text Available The advent of massive parallel sequencing (MPS has revolutionized the field of human molecular genetics, including the diagnostic study of mitochondrial (mt DNA dysfunction. The analysis of the complete mitochondrial genome using MPS platforms is now common and will soon outrun conventional sequencing. However, the development of a robust and reliable protocol is rather challenging. A previous pilot study for the re-sequencing of human mtDNA revealed an uneven coverage, affecting predominantly part of the plus strand. In an attempt to address this problem, we undertook a comparative study of standard and modified protocols for the Ion Torrent PGM system. We could not improve strand representation by altering the recommended shearing methodology of the standard workflow or omitting the DNA polymerase amplification step from the library construction process. However, we were able to associate coverage bias of the plus strand with a specific sequence motif. Additionally, we compared coverage and variant calling across technologies. The same samples were also sequenced on a MiSeq device which showed that coverage and heteroplasmic variant calling were much improved.
Exactly stable non-BPS spinors in heterotic string theory on tori
Seo, Jihye
2012-01-01
Considering SO(32) heterotic string theory compactified on a torus of dimension 4 and less, stability of non-supersymmetric states is studied. A non-supersymmetric state with robust stability is constructed, and its exact stability is proven in a large region of moduli space against all the possible decay mechanisms allowed by charge conservation. Using various T-duality transform matrices, we translate various selection rules about conserved charges into simpler problems resembling partition and parity of integers. For heterotic string on T^4, we give a complete list of BPS atoms with elementary excitations, and we study BPS and non-BPS molecules with various binding energies. Using string-string duality, the results are interpreted in terms of Dirichlet-branes in type IIA string theory compactified on an orbifold limit of a K3 surface.
Exactly stable non-BPS spinors in heterotic string theory on tori
Seo, Jihye
2013-01-01
Considering SO(32) heterotic string theory compactified on T d with d ≤ 4, stability of non-supersymmetric states is studied. A non-supersymmetric state with robust stability is constructed, and its exact stability is proven in a large region of moduli space against all the possible decay mechanisms allowed by charge conservation. Using various T -duality transform matrices of [1], we translate various selection rules about conserved charges into simpler problems resembling partition and parity of integers. For heterotic string on T 4, we give a complete list of BPS atoms with elementary excitations, and we study BPS and non-BPS molecules with various binding energies. Using string-string duality, the results are interpreted in terms of Dirichlet-branes in type IIA string theory compactified on an orbifold limit of a K3 surface.
The Witten-Reshetikhin-Turaev invariants of finite order mapping tori II
DEFF Research Database (Denmark)
Andersen, Jørgen Ellegaard; Himpel, Benjamin
2012-01-01
space of flat connections and the leading order term is identified with the integral over this moduli space of this density weighted by a certain phase for each component of the moduli space. We also identify this phase in terms of classical invariants such as Chern–Simons invariants, eta invariants...
Noncommutative Compactifications of Type I Strings on Tori with Magnetic Background Flux
Blumenhagen, R; Körs, B; Lüst, Dieter; Blumenhagen, Ralph; Goerlich, Lars; Kors, Boris; Lust, Dieter
2000-01-01
We construct six- and four-dimensional toroidal compactifications of the Type I string with magnetic flux on the D-branes. The open strings in this background probe a noncommutative internal geometry. Phenomenologically appealing features such as chiral fermions and supersymmetry breaking in the gauge sector are naturally realized by these vacua. We investigate the spectra of such noncommutative string compactifications and in a bottom-up approach discuss the possibility to obtain the standard or some GUT like model.
Long time existence for the semi-linear beam equation on irrational tori of dimension two
Imekraz, Rafik
2016-10-01
We prove a long time existence result for the semi-linear beam equation with small and smooth initial data. We use a regularizing effect of the structure of beam equations and a very weak separation property of the spectrum of an irrational torus under a Diophantine assumption on the radius. Our approach is inspired from a paper by Zhang about the Klein-Gordon equation with a quadratic potential.
Magnetic loop generation by collisionless gravitationally bound plasmas in axisymmetric tori.
Cremaschini, Claudio; Stuchlík, Zdeněk
2013-04-01
Current-carrying string loops are adopted in astrophysics to model the dynamics of isolated flux tubes of magnetized plasma expected to arise in the gravitational field of compact objects, such as black holes. Recent studies suggest that they could provide a framework for the acceleration and collimation of jets of plasma observed in these systems. However, the problem remains of the search of physical mechanisms which can consistently explain the occurrence of such plasma toroidal structures characterized by nonvanishing charge currents and are able to self-generate magnetic loops. In this paper, the problem is addressed in the context of Vlasov-Maxwell theory for nonrelativistic collisionless plasmas subject to both gravitational and electromagnetic fields. A kinetic treatment of quasistationary axisymmetric configurations of charged particles exhibiting epicyclic motion is obtained. Explicit solutions for the species equilibrium phase-space distribution function are provided. These are shown to have generally a non-Maxwellian character and to be characterized by nonuniform fluid fields and temperature anisotropy. Calculation of the relevant fluid fields and analysis of the Ampere equation then show the existence of nonvanishing current densities. As a consequence, the occurrence of a kinetic dynamo is proved, which can explain the self-generation of both azimuthal and poloidal magnetic fields by the plasma itself. This mechanism can operate in the absence of instabilities, turbulence, or accretion phenomena and is intrinsically kinetic in character. In particular, several kinetic effects contribute to it, identified here with finite Larmor radius, diamagnetic and energy-correction effects together with temperature anisotropy, and non-Maxwellian features of the equilibrium distribution function.
广义Boussinesq方程的KAM环面%KAM tori for generalized Boussinesq equation
Institute of Scientific and Technical Information of China (English)
石艳玲; 陆雪竹
2015-01-01
考虑周期边界下具有非线性项f(u) =u3的一维广义Boussinesq方程utt-uxx+(f(u)+uxx)xx=0.首先,将上述方程转化为一个哈密顿系统,并将该系统在线性算子的特征基上展开得到坐标形式下的哈密顿系统.鉴于切频与法频之间复杂的共振关系,考虑一类具有特殊结构的拟周期解.其次,验证了哈密顿向量场的正则性,并对四次项进行规范化,从规范形中可以得到无穷维KAM定理所要求的非退化和非共振条件.利用一个KAM定理证明与方程等价的无穷维哈密顿系统存在许多有限维不变环面,故原方程有许多小振幅的拟周期解.
Energy Technology Data Exchange (ETDEWEB)
Ya.I. Kolesnichenko; V.V. Lutsenko; R.B. White; Yu.V. Yakovenko
2004-07-06
Effects of MHD reconnection events on the beam-plasma fusion reactivity and transport of the beam ions are studied. Based on the analysis of fusion reactivity changes induced by MHD events, the conclusion is drawn that the strong drops of the neutron yield during sawtooth crashes observed in the National Spherical Torus experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] are associated with both a particle redistribution inside the plasma and a loss of the beam ions. Mechanisms of the energetic ion transport during sawtooth crashes are analyzed, in particular, with the use of the resonance adiabatic invariant derived in this paper. A numerical simulation of the particle motion during a sawtooth crash in NSTX is done with the code OFSEF [Ya. I. Kolesnichenko, et al., Nucl. Fusion 40, 1325 (2000)] extended for a better description of the particle precession. It is shown that the motion of toroidally passing particles in NSTX can become stochastic under the influence of a crash. This stochasticity, as well as the motion along the resonance island, leads to the escape of some particles from the plasma.
Bifurcations of Invariant Tori and Subharmonic Solutions for Periodic Perturbed Systems
Institute of Scientific and Technical Information of China (English)
韩茂安
1994-01-01
The time-periodic perturbations of planar Hamiltonian systems are investigated.A necessary condition for the existence of an invariant torus,a sufficient condition for the bifurcation of a unique invariant torus and a subharmonic solution are obtained.
Mid-infrared interferometry of 23 AGN tori: On the significance of polar-elongated emission
López-Gonzaga, N; Tristram, K R W; Meisenheimer, K; Schartmann, M
2016-01-01
Context. Detailed high resolution studies of AGN with mid-infrared (MIR) interferometry have revealed parsec-sized dust emission elongated in the polar direction in four sources. Aims. Using a larger, coherently analyzed sample of AGN observed with MIR interferometry, we aim to identify elongated mid-infrared emission in a statistical sample of sources. More specifically we wish to determine if there is indeed a preferred direction of the elongation and whether this direction is consistent with a torus-like structure or with a polar emission. Methods. We investigate the significance of the detection of an elongated shape in the MIR emission by fitting elongated Gaussian models to the interferometric data at 12 um. We pay special attention to 1) the uncertainties caused by an inhomogeneous (u,v) coverage, 2) the typical errors in the measurements and 3) the spatial resolution achieved for each object. Results. From our sample of 23 sources we are able to find elongated parsec-scale MIR emission in five sources...
The quenching of star formation in accretion-driven clumpy turbulent tori of active galactic nuclei
Vollmer, B; Davies, R. I.
2013-01-01
Galactic gas-gas collisions involving a turbulent multiphase ISM share common ISM properties: dense extraplanar gas visible in CO, large linewidths (>= 50 km/s), strong mid-infrared H_2 line emission, low star formation activity, and strong radio continuum emission. Gas-gas collisions can occur in the form of ICM ram pressure stripping, galaxy head-on collisions, compression of the intragroup gas and/or galaxy ISM by an intruder galaxy which flies through the galaxy group at a high velocity, ...
THE UTILIZATION OF THE THERAPEUTIC TOY IN THE NURSING OPERA TORY VISIT TO THE INFANT
Cláudia Silveira Viera; Marister Piccoli; Silvana Machiavelli Schmitz
2003-01-01
The systematization of the peroperative nursing occurs in the moments pre, trans and postoperativeand also they happen in children, adolescents, adults and elders. Being like this, ours objective went verify thebenefits of the utilization of the therapeutic toy in the visit preoperative by the nurse of surgical center.
Bussifirmadel 64 miljonit krooni puudu / Ivo Volt, Villem Tori ; interv. Tanel Raig
Volt, Ivo, 1968-
2005-01-01
Bussifirmadel puudub 2005. aastaks 64 miljonit krooni dotatsiooniraha ning seepärast ei jõuta ametiühingutega kokkuleppele bussijuhtide palgatõusu suuruses. Piletihindade tõusust, liinimahtude vähenemisest, bussifirmade tulevikust, palgaläbirääkimistest
Neoclassical toroidal torque generation by auxiliary heating in non-axisymmetric tori
Lazzaro, E.; Nowak, S.; Sauter, O.
2016-12-01
In conditions of ideal axisymmetry, for a magnetized plasma in a generic bounded domain, necessarily toroidal, the uniform absorption of external energy (e.g. rf or isotropic alpha heating) clearly cannot give rise to net forces or torques. A rather common experimental observation on contemporary tokamaks is that the near central absorption of auxiliary heating power (often ICH, ECH, and LHCD) and current drive in presence of non axisymmetric magnetic perturbations, including tearing modes, drives a bulk plasma rotation in the co - I p direction. Also growing tearing modes provide a nonlinear magnetic braking that tends to flatten the rotation profile and clamp it at the q-rational surfaces. The physical origin of the torque associated with P aux absorption could be due the effects of asymmetry in deposition or in the equilibrium configuration, but here we consider also the effect of the response of the so called neoclassical offset velocity to the power dependent heat flow increment. The neoclassical toroidal viscosity (NTV), due to error fields, internal magnetic kink or tearing modes tends to relax the plasma rotation to this asymptotic speed, which in absence of auxiliary heating is of the order of the ion diamagnetic velocity. It can be shown by a kinetic calculation, this offset velocity is a function of the absorbed heat and therefore of the injected auxiliary power, thereby forcing the plasma rotation in a direction opposite to the initial, to large values. The problem is discussed in the frame of the theoretical models of neoclassical toroidal viscosity.
THE UTILIZATION OF THE THERAPEUTIC TOY IN THE NURSING OPERA TORY VISIT TO THE INFANT
Directory of Open Access Journals (Sweden)
Cláudia Silveira Viera
2003-12-01
Full Text Available The systematization of the peroperative nursing occurs in the moments pre, trans and postoperativeand also they happen in children, adolescents, adults and elders. Being like this, ours objective went verify thebenefits of the utilization of the therapeutic toy in the visit preoperative by the nurse of surgical center.
From the Circumnuclear Disk in the Galactic Center to thick, obscuring tori of AGNs
Vollmer, B; Duschl, W J
2004-01-01
We compare three different models of clumpy gas disk and show that the Circumnuclear Disk (CND) in the Galactic Center and a putative, geometrically thick, obscuring torus are best explained by a collisional model consisting of quasi-stable, self-gravitating clouds. Kinetic energy of clouds is gained by mass inflow and dissipated in cloud collisions. The collisions give rise to a viscosity in a spatially averaged gas dynamical picture, which connects them to angular momentum transport and mass inflow. It is found that CND and torus share the same gas physics in our description, where the mass of clouds is 20 - 50 M_sun and their density is close to the limit of disruption by tidal shear. We show that the difference between a transparent CND and an obscuring torus is the gas mass and the velocity dispersion of the clouds. A change in gas supply and the dissipation of kinetic energy can turn a torus into a CND-like structure and vice versa. Any massive torus will naturally lead to sufficiently high mass accreti...
An X-ray spectral model for clumpy tori in active galactic nuclei
Liu, Yuan
2014-01-01
We construct an X-ray spectral model for the clumpy torus in an active galactic nucleus (AGN) using Geant4, which includes the physical processes of the photoelectric effect, Compton scattering, Rayleigh scattering, $\\gamma$ conversion, fluorescence line, and Auger process. Since the electrons in the torus are expected to be bounded instead of free, the deviation of the scattering cross section from the Klein-Nishina cross section has also been included, which changes the X-ray spectra by up to 25% below $10$ keV. We have investigated the effect of the clumpiness parameters on the reflection spectra and the strength of the fluorescent line Fe K$\\alpha$. The volume filling factor of the clouds in the clumpy torus only slightly influences the reflection spectra, however, the total column density and the number of clouds along the line of sight significantly change the shapes and amplitudes of the reflection spectra. The effect of column density is similar to the case of a smooth torus, while a small number of c...
Quasi-localized wavefunctions on magnetized tori and tiny neutrino Yukawa couplings
Sumita, Keigo
2015-01-01
This paper shows that, a quasi-localization of wavefunctions in toroidal compactifications with magnetic fluxes can lead to a strong suppression for relevant Yukawa couplings, and it is applicable to obtain tiny neutrino masses. Although it is known that magnetic fluxes lead to a Gaussian profile of zero-modes on a torus and that can yield a suppressed coupling in higher-dimensional supersymmetric Yang-Mills (SYM) theories, the largest (diagonal) entry of Yukawa matrices is always of $\\mathcal O(1)$. In this paper, we propose a way to induce an absolutely tiny global factor of Yukawa matrices. In two SYM theories defined in different dimensional spacetime, their bifundamental representations must be localized as a point in some directions. Overlaps of such point-like localized wavefunctions and Gaussian zero-modes give a global factor of Yukawa matrices, and it can be a strong suppression factor or a usual $\\mathcal O(1)$ factor, corresponding to their distance. Our numerical analysis shows that it is possibl...
Invariant Tori in the Secular Motions of the Three-body Planetary Systems
Locatelli, Ugo; Giorgilli, Antonio
We consider the problem of the applicability of KAM theorem to a realistic problem of three bodies. In the framework of the averaged dynamics over the fast angles for the Sun-Jupiter-Saturn system we can prove the perpetual stability of the orbit. The proof is based on semi-numerical algorithms requiring both explicit algebraic manipulations of series and analytical estimates. The proof is made rigorous by using interval arithmetics in order to control the numerical errors.
A Female Interrogative Reader: The Adolescent Jane Austen Reads and Rewrites (His)tory.
Reid-Walsh, Jacqueline
1992-01-01
Argues that Jane Austen's unpublished juvenile work "The History of England" has considerable relevance to twentieth-century high-school English classrooms. Notes that the work humorously shows the gender bias of traditional history texts because it is a "woman-centered" rewriting. (RS)
Numerical study of drift-kinetic evolution of collisional plasmas in tori
Energy Technology Data Exchange (ETDEWEB)
Beasley, Jr., C. O.; Meier, H. K.; van Rij, W. I.; McCune, J. E.
1976-03-01
Preliminary numerical results for the dynamics of toroidally confined plasmas in the drift-kinetic, Fokker--Planck description are discussed. These solutions were obtained by using the techniques inherent to the collisional plasma model (CPM) described in detail elsewhere. An initial value problem is solved in the local approximation in which collisions and particle dynamics compete in a given magnetic field to set up a quasi-equilibrium. Both the plasma (guiding center) distribution function and many macroscopic quantities of interest are monitored. Good agreement with corresponding but more approximate theories is obtained over a wide range of collisionality, particularly with regard to the neoclassical particle flux. Encouraging confirmation of earlier results for the distribution function is achieved when due account is taken of the differing collisionality of particles with differing energies. These initial results indicate the potential importance of certain non-local effects as well as inclusion of self-consistency between fields and plasma currents and densities.
On shrinking targets for Z^{m} actions on tori
DEFF Research Database (Denmark)
Bugeaud, Yann; Harrap, Stephen; Kristensen, S.;
Let be an matrix with real entries. Consider the set of for which there exists a constant such that for any the distance between and the point is at least . It is shown that the intersection of with any suitably regular fractal set is of maximal Hausdorff dimension. The linear form systems invest...
The quenching of star formation in accretion-driven clumpy turbulent tori of active galactic nuclei
Vollmer, B
2013-01-01
Galactic gas-gas collisions involving a turbulent multiphase ISM share common ISM properties: dense extraplanar gas visible in CO, large linewidths (>= 50 km/s), strong mid-infrared H_2 line emission, low star formation activity, and strong radio continuum emission. Gas-gas collisions can occur in the form of ICM ram pressure stripping, galaxy head-on collisions, compression of the intragroup gas and/or galaxy ISM by an intruder galaxy which flies through the galaxy group at a high velocity, or external gas accretion on an existing gas torus in a galactic center. We suggest that the common theme of all these gas-gas interactions is adiabatic compression of the ISM leading to an increase of the turbulent velocity dispersion of the gas. The turbulent gas clouds are then overpressured and star formation is quenched. Within this scenario we developed a model for turbulent clumpy gas disks where the energy to drive turbulence is supplied by external infall or the gain of potential energy by radial gas accretion wi...
Vance, William; Ross, John
1988-05-01
We study experimentally continuous transitions from quasiperiodic to periodic states for a time-periodically forced chemical oscillator. The chemical reaction is the hydration of 2,3-epoxy-1-propanol, and is carried out in a continuous stirred tank reactor (CSTR). Periodic oscillatory states are observed to arise in the autonomous system through supercritical Hopf bifurcations as either the total flow rate or the cooling coil temperature is changed. Under conditions of oscillation for the autonomous system, small-amplitude periodic variation of the total flow rate generates an attracting two-torus from the stable limit cycle. From the experiments we determine the structure of the toroidal flow, stroboscopic phase portraits, and circle maps as a function of the forcing amplitude and period. A continuous transition from the quasiperiodic to a periodic state, in which the two-torus contracts to a closed curve (Neimark-Sacker torus bifurcation), is observed as the forcing amplitude is increased at a constant forcing period, or as the forcing period is changed at a constant moderate forcing amplitude. Qualitative theoretical predictions compare well with the experimental observations. This paper presents the first experimental observation of a Neimark-Sacker torus bifurcation in a forced chemical oscillator system, and relates the bifurcation diagram of the unforced system to that of the forced system.
Gallavotti, G
1997-01-01
Local integrability of hyperbolic oscillators is discussed to provide an introductory example of the Arnold's diffusion phenomenon in a forced pendulum. This is a text prepared for the the ISI summer school of June 1997 and deals with developments of the topics treated in the lectures.
Directory of Open Access Journals (Sweden)
Sabiti Makara
2010-01-01
Full Text Available The 2011 elections will be one of the several elections (and the second-ever multiparty election organized by the National Resistance Movement (NRM since it captured power in 1986. Despite the regular elections since the 1990s, the quality and outcomes of these elections have remained subjects of debate. Democracy has remained elusive in Uganda despite the re-introduction of multiparty politics. Incumbency advantages, manipulation and unconstitutional use of state resources and apparatuses, and removal of the constitutional term limits on the presidency have combined to hamper effective growth of multiparty politics and democracy in the country. The question is: Does electioneering necessarily produce democratic governance or does it simply create the conditions and norms necessary for institutionalization of democratic rule? In particular, does the existence of multiparty politics necessarily deepen democratic governance? This paper stresses that despite the return of multiparty politics in Uganda, neither has democracy been consolidated nor have elections acted as effective instruments for advancing democratization in the country. Wie schon mehrfach zuvor werden auch die Wahlen 2011 in Uganda vom regierenden National Resistance Movement (NRM organisiert werden, das im Jahr 1986 die Macht übernommen hat; es werden die zweiten Mehrparteienwahlen sein, die es in Uganda überhaupt gab. Auch wenn seit den 1990er Jahren regulär Wahlen durchgeführt worden sind, waren doch Ablauf und Ergebnisse dieser Wahlen Gegenstand von Diskussionen. Trotz der Wiedereinführung eines Mehrparteiensystems bleibt die Demokratie in Uganda ein schwer zu fassendes Phänomen. Infolge der Nutzung von Amtsvorteilen, Manipulationen, nichtverfassungsgemäßem Einsatz staatlicher Ressourcen und Einrichtungen sowie der Abschaffung der in der Verfassung vorgesehenen Begrenzung der Amtszeit des Präsidenten konnten sich Demokratie und Mehrparteiensystem im Land nicht entwickeln. Damit steht in Frage, ob Wahlen notwendigerweise zu demokratischem Regieren führen oder ob sie nicht zunächst einmal nur Bedingungen und Normen schaffen, die Voraussetzung für eine Institutionalisierung demokratischer Regierung sind, und insbesondere steht in Frage, ob die Existenz eines Mehrparteiensystems notwendigerweise zur Vertiefung demokratischer Regierungsführung beiträgt. Der Autor stellt fest, dass trotz der Wiedereinführung eines Mehrparteiensystems in Uganda eine Konsolidierung der Demokratie nicht zu beobachten ist und dass die Wahlen sich bisher nicht als effektive Instrumente zur Förderung der Demokratisierung erwiesen haben.
Investigation of Aerodynamic Behavior for Bumpy Inflatable Wing%表面凹凸充气机翼的气动特性研究
Institute of Scientific and Technical Information of China (English)
冯志壮; 李斌
2014-01-01
充气机翼在变体飞机和飞艇中具有潜在的应用前景.充气机翼的结构特征与传统硬质机翼显著不同,其外形与传统机翼相比最大的差异在于表面的片条状鼓包,这种外形带来的气动特性、气弹行为等越来越受到人们的关注.以NACA0015翼型为原形,设计制作充气机翼模型,并利用CFX对传统光滑的NACA0015翼型和凹凸表面的0015F2翼型进行定常和非定常气动行为分析.结果表明:充气机翼的凹凸表面外形增加翼型的失速攻角,但其升力线斜率及升阻比都较光滑翼型要小;0015F2翼型的速度梯度过度区大于NACA0015翼型;0015F2翼型在每一个凹槽区生成驻涡,驻涡的存在使得充气机翼的附面层呈现紊流附面层的特性,驻涡的外移改变了机翼后缘的尾涡形成,推迟了分离,使得失速攻角增大.
Energy Technology Data Exchange (ETDEWEB)
Matsumoto, Michiaki; Yuba, Seiji; Kondo, Kazui
1999-01-05
Co-extraction of lactic acid was examined as a fundamental research for establishing in situ extraction fermentation process of lactic acid (HA). Addition of tri-n-butyl phosphate (TBP) into an extraction system of lactic acid by tri-n-octylamine (TOA) using hexane as the dilutor brought about a great cooperative effect. The extracting reaction in this system is analyzed by taking into consideration the formation of HA-TOA-2TBP. Further, when a TBP and TOA-containing hexane solution was added into a culture system of a lactic acid bacteria Lactobacillus rhamnosus, latic acid of 65% in a system without addition of an organic solvent was produced. (translated by NEDO)
Directory of Open Access Journals (Sweden)
Abdênago Barros
2004-12-01
Full Text Available In this note we will show that the inverse image under the stereographic projection of a circular torus of revolution in the 3-dimensional euclidean space has constant mean curvature in the unit 3-sphere if and only if their radii are the catet and the hypotenuse of an appropriate right triangle.Neste artigo mostraremos que a imagem inversa pela projeção estereográfica de um toro circular de revolução no espaço euclidiano de dimensão 3 tem curvatura média constante se e somente se os seus raios são o cateto e a hipotenusa de um triângulo retângulo apropriado.
Star formation black hole growth and dusty tori in the most luminous AGNs at z=2-3.5
Netzer, Hagai; Nordon, Raanan; Trakhtenbrot, Benny; Lira, Paulina; Shemmer, Ohad
2015-01-01
We report herschel observations of 100 very luminous, optically selected AGNs at z=2-3.5 with log(LUV)(erg/sec)> 46.5, where LUV=L1350A. The distribution in LUV is similar to the general distribution of SDSS AGNs in this redshift and luminosity interval. We measured SF luminosity, LSF, and SFR in 34 detected sources by fitting combined SF and WISE-based torus templates. We also obtained statistically significant stacks for the undetected sources in two luminosity groups. The sample properties are compared with those of very luminous AGNs at z>4.5. The main findings are: 1) The mean and the median SFRs of the detected sources are 1176 and 1010 Msun/yr, respectively. The mean SFR of the undetected sources is 148 Msun/yr. The ratio of SFR to BH accretion rate is approximately 80 for the detected sources and less than 10 for the undetected sources. There is no difference in LAGN and only a very small difference in L(torus) between detected and undetected sources. 2) The redshift distribution of LSF and LAGN for t...
Large-angle OBServaTory with Energy Resolution for Synoptic X-ray Studies (LOBSTER-SXS)
Gorenstein, Paul
2011-01-01
The soft X-ray band hosts a larger, more diverse range of variable sources than any other region of the electromagnetic spectrum. They are stars, compact binaries, SMBH's, the X-ray components of Gamma-Ray Bursts, their X-ray afterglows, and soft X-ray flares from supernova. We describe a concept for a very wide field (~ 4 ster) modular hybrid X-ray telescope system that can measure positions of bursts and fast transients with as good as arc second accuracy, the precision required to identify fainter and increasingly more distant events. The dimensions and materials of all telescope modules are identical. All but two are part of a cylindrical lobster-eye telescope with flat double sided mirrors that focus in one dimension and utilize a coded mask for resolution in the other. Their positioning accuracy is about an arc minute. The two remaining modules are made from the same materials but configured as a Kirkpatrick-Baez telescope with longer focal length that focuses in two dimensions. When pointed it refines ...
Lim, Gerald H W; Huber, Greg
2009-03-18
Constrained minimization of energy functionals is a central part, and usually the difficult part, of solving problems in the equilibrium mechanics of biological and biomimetic membranes. The inherent difficulties of the conventional variational-calculus approach prevents the numerical calculation involved from being made routine in the analyses of experimental results. We have developed a simulated annealing-based computational technique for routinizing the task of constrained minimization of energy functionals governing whole, or small patches of whole, fluid membranes with axisymmetry, spherical topology, and no domains of inhomogeneity. In this article, we describe the essential principles of the technique and apply it to five examples to demonstrate its versatility. It gives membrane shapes that are automatically stable to axisymmetric perturbations. Presently, it can account for constraints on 1), the membrane area or the effective membrane tension; 2), the enclosed volume or the effective pressure difference across the membrane thickness; and 3), the axial end-to-end distance or the applied axial point force.
The Wide Range of Hot Dust Emission from Quasars: Clumpy Tori, Warped Disks and Black Hole Feeding
Elvis, Martin
Objectives: Quasars and AGNs show characteristic hot dust emission not seen in other objects. This is due to an obscuring "torus" in the inner regions of the quasar. Understanding of this "torus" has progressed slowly in the past 2+ decades. Based on our WISE-based pilot project we find a wide range of IR (dust) to optical (accretion disk) emission ratios in quasar spectral energy distributions (SEDs). This implies order of magnitude differences in the covering factor of the obscuring "torus" from object to object. Moreover the near- IR (hot dust) to mid-IR (warm dust) ratio varies by a similar factor, so the structure within the "torus" also varies greatly from object to object. The results will inform us not only about the inner structure of quasars, but also of the mechanism that brings matter into bound orbit around the central supermassive black hole (SMBH). Methods: We propose to analyze the WISE data for 24,257 SDSS broad emission line, type 1, quasars that also lie in the near-IR UKIDSS survey to produce optical-mid-IR SEDs. The properties of the dust-emitting region will be our primary focus. Previous samples have been limited to a few hundred quasar SEDs. With this large sample we can search for systematic SED changes with redshift, luminosity and with physical parameters derived from the SDSS spectra: black hole mass and Eddington ratio. We will use the 'mixing diagram' method developed for COSMOS, plus theory based clumpy torus and warped disk models. Significance: The growth of supermassive black holes is a central part of galaxy evolution and cosmology, yet is poorly understood. The "torus" is likely the resevoir from which the accretion disk is fed, but how it forms is unknown. Moreover AGN "feedback" is thought to have a major effect on the evolution of galaxies, regulating star formation. However, the influence of the central AGN on its host galaxy is limited if the "torus" intercepts most of AGN continuum, or blocks accretion disk winds. Our project will address both issues directly.
Binomul distanţă - timp în transportul feroviar de călători
Directory of Open Access Journals (Sweden)
Liviu Gabriel Ghiţuleasa
2012-12-01
Full Text Available Railways confronted substantial challenges through last years and made major progress in addressing them. Also, the European Commission identified some concrete priorities between 2011 and 2012, priorities that boost growth, including increasing investment in transport and infrastructures. Therefore, European Union transport policies aim at fostering a clean, safe and efficient travel throughout Europe, underpinning the right of citizens to travel freely throughout the EU. With arguments about access, competitivity, responsability, sustainability and security partly unresolved, this article presents that the concepts has been around for some time and has gradually been applied to existing railway transportation. We must see those rail services and infrastructure that there sits empty, slowly deteriorating in some EU member states, because railways brings us great benefits, but also great responsabilities.
Achilleos, V; Bishop, A R; Diamantidis, S; Frantzeskakis, D J; Horikis, T P; Karachalios, N I; Kevrekidis, P G
2016-07-01
The dynamical behavior of a higher-order cubic Ginzburg-Landau equation is found to include a wide range of scenarios due to the interplay of higher-order physically relevant terms. We find that the competition between the third-order dispersion and stimulated Raman scattering effects gives rise to rich dynamics: this extends from Poincaré-Bendixson-type scenarios, in the sense that bounded solutions may converge either to distinct equilibria via orbital connections or to space-time periodic solutions, to the emergence of almost periodic and chaotic behavior. One of our main results is that third-order dispersion has a dominant role in the development of such complex dynamics, since it can be chiefly responsible (even in the absence of other higher-order effects) for the existence of periodic, quasiperiodic, and chaotic spatiotemporal structures. Suitable low-dimensional phase-space diagnostics are devised and used to illustrate the different possibilities and identify their respective parametric intervals over multiple parameters of the model.
Energy Technology Data Exchange (ETDEWEB)
Saeki, J. (Hitachi Ltd., Tokyo (Japan)); Kaneda, A. (Hitachi Chemical Co. Ltd., Tokyo (Japan))
1990-08-25
A study was made on the flow channel design of a multi-cavity mold by filling simulation for thermosets. A practical analytic method was developed for the calculation of pressure losses at various locations in the channel following the estimation of viscosity change in the thermosets in the mold with optional shape. The runner and gate are designed for equal flow distribution to each cavity, and a newly developed model and a conventional type model were trially made for various evaluation using the conditions set at the time of designing. Ideal filling was achieved with the newly developed type model, and the design method of the type was confirmed to be reasonable. Characteristic values were studied which can be considered to give effect on the deformation of gold wires and void formation in molded devices. The effects on the prevention of gold wire deformation, decrease in void formation, and widening formation margin were confirmed. By the developed mold designing method, less diameter gold wire may be used without decreasing the quality of the package. 10 refs., 11 figs., 5 tabs.
Furui, Shun'ya; Odaka, Hirokazu; Kawaguchi, Toshihiro; Ohno, Masanori; Hayashi, Kazuma
2016-01-01
We construct an X-ray spectral model of reprocessing by a torus in an active galactic nucleus (AGN) with a Monte Carlo simulation framework MONACO. Two torus geometries of smooth and clumpy cases are considered and compared. In order to reproduce a Compton shoulder accurately, MONACO includes not only free electron scattering but also bound electron scattering. Raman and Reyleigh scattering are also treated, and scattering cross sections dependent on chemical states of hydrogen and helium are included. Doppler broadening by turbulence velocity can be implemented. Our model gives consistent results with other available models, such as MYTorus, except for differences due to different physical parameters and assumptions. We studied the dependence on torus parameters for Compton shoulder, and found that a intensity ratio of Compton shoulder to line core mainly depends on the column density, inclination angle, and metal abundance. For instance, an increase of metal abundance makes the Compton shoulder relatively w...
Achilleos, V.; Bishop, A. R.; Diamantidis, S.; Frantzeskakis, D. J.; Horikis, T. P.; Karachalios, N. I.; Kevrekidis, P. G.
2016-07-01
The dynamical behavior of a higher-order cubic Ginzburg-Landau equation is found to include a wide range of scenarios due to the interplay of higher-order physically relevant terms. We find that the competition between the third-order dispersion and stimulated Raman scattering effects gives rise to rich dynamics: this extends from Poincaré-Bendixson-type scenarios, in the sense that bounded solutions may converge either to distinct equilibria via orbital connections or to space-time periodic solutions, to the emergence of almost periodic and chaotic behavior. One of our main results is that third-order dispersion has a dominant role in the development of such complex dynamics, since it can be chiefly responsible (even in the absence of other higher-order effects) for the existence of periodic, quasiperiodic, and chaotic spatiotemporal structures. Suitable low-dimensional phase-space diagnostics are devised and used to illustrate the different possibilities and identify their respective parametric intervals over multiple parameters of the model.
Del Zanna, L; Bucciantini, N
2014-01-01
We present the first astrophysical application of the ECHO code in its recent version supplemented by a generalized Ohm law, namely a kinematic study of dynamo effects in thick accretion disks. High-order \\emph{implicit-explicit} Runge-Kutta time-stepping routines are implemented and validated within $3+1$ \\emph{General Relativistic MagnetoHydroDynamics} (GRMHD). The scheme is applied to a differentially rotating torus orbiting a Kerr black hole, where the mean-field dynamo process leads to strong amplification of seed magnetic fields. We show that the interplay between the toroidal and poloidal components occurs qualitatively in the same fashion as in the Sun, butterfly diagrams are reproduced, and a typical time-scale for the field evolution is found, depending on the dynamo and resistivity numbers, which could explain periodicities as observed in several accreting systems.
Institute of Scientific and Technical Information of China (English)
EOOmeje; POOsadebe; FBCOkoyea; AKAgwu; COEsimone
2008-01-01
Loranthus micranthus is the species of mistletoe peculiar to the eastern province of Nigeria.It has been shown to possess anti-diabetic,antimotility,antimicrobial and antihypertensive activities which are host-tree depend-ent.The antimicrobial activity was found to vary with the season during which the plant was harvested.We are of the opinion that this species should possess immunomodulating potentials as have been reported for the Euro-pean species,Viscum album.In our efforts to establish the bio-activities and active principles in our local mis-tletoe,the immunomodulatory activity of n-hexane and methanol extracts from Loranthus micranthus parasitic on Persea americana was assessed at three dose levels ranging from 100 to 400 mg/kg body weight using de-layed type hypersensitivity reaction (DTHR)and cyclophosphamide-induced myelosuppression models in mice.This was compared with responses from a standard immunostimulatory drug,levamisole.Preliminary phytochemical analysis of the plant showed the presence of tannins,flavonoids,alkaloids,terpenoids,carbo-hydrates and saponins.Regression analysis indicated a dose-dependent response relationship in the parameters measured with over 170 % increase for both extracts at the highest dose level.The one way ANOVA test showed significant variation in the parameters between the controls and the different dose levels.However,at 95 % confidence level,(P <0.05),there was no statistically significant difference between the two extracts, an indication that the active immunomodulant(s)could be both in the polar and non-polar crude extract.In conclusion,the present results have established some immune stimulating actions of the Eastern Nigeria mistle-toe,Loranthus micranthus thus indicating that this variant of the semi parasitic plant holds a strong promise as an immunostimulatory candidate.There is therefore,a basis for further detailed investigation on the fractions and specific constituents.Thus,these extracts from Loranthus micranthus possess pronounced immune stimula-ting action comparable to Levamisole in mouse-based models.
Energy Technology Data Exchange (ETDEWEB)
Furui, Shun’ya; Fukazawa, Yasushi; Ohno, Masanori; Hayashi, Kazuma [Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Odaka, Hirokazu [Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 2575 Sand Hill Rd, Menlo Park, CA 94025 (United States); Kawaguchi, Toshihiro, E-mail: fukazawa@hep01.hepl.hiroshima-u.ac.jp [Department of Liberal Arts and Sciences, Sapporo Medical University, S1W17, Chuo-ku, Sapporo 060-8556 (Japan)
2016-02-20
We construct an X-ray spectral model of reprocessing by a torus in an active galactic nucleus (AGN) with the Monte Carlo simulation framework MONACO. Two torus geometries of smooth and clumpy cases are considered and compared. In order to reproduce a Compton shoulder accurately, MONACO includes not only free electron scattering but also bound electron scattering. Raman and Rayleigh scattering are also treated, and scattering cross sections dependent on chemical states of hydrogen and helium are included. Doppler broadening by turbulence velocity can be implemented. Our model gives results consistent with other available models, such as MYTorus, except for differences due to different physical parameters and assumptions. We studied the dependence on torus parameters for a Compton shoulder, and found that a intensity ratio of a Compton shoulder to the line core mainly depends on column density, inclination angle, and metal abundance. For instance, an increase of metal abundance makes a Compton shoulder relatively weak. Also, the shape of a Compton shoulder depends on the column density. Furthermore, these dependences become different between smooth and clumpy cases. Then, we discuss the possibility of ASTRO-H/SXS spectroscopy of Compton shoulders in AGN reflection spectra.
Nickse, Ruth S.
Two definitions most often used by adult educators to describe competency-based adult education (CBAE) are one posited by Spady (1977) and another formulated by state adult basic education directors. The first, a "prescriptive-consensual" definition, describes conditions of a phenomenon (CBAE) and relies on the experience of acknowledged experts,…
Degenerate elliptic resonances
Gentile, G
2004-01-01
Quasi-periodic motions on invariant tori of an integrable system of dimension smaller than half the phase space dimension may continue to exists after small perturbations. The parametric equations of the invariant tori can often be computed as formal power series in the perturbation parameter and can be given a meaning via resummations. Here we prove that, for a class of elliptic tori, a resummation algorithm can be devised and proved to be convergent, thus extending to such lower-dimensional invariant tori the methods employed to prove convergence of the Lindstedt series either for the maximal (i.e. KAM) tori or for the hyperbolic lower-dimensional invariant tori
Soosaarte hobusearetusdünastial täitub ümmargusi tähtpäevi / Aime Jõgi
Jõgi, Aime, 1958-
2000-01-01
Filmimees Mark Soosaare vanaisa, Tori Hobuste Tõuseltsi juhataja Johan Soosaar seeniori 135. sünniaastapäevaks ja isa, Tori Hobuste Tõuseltsi sekretäri Johan Soosaar juuniori 100. sünniaastapäevaks
Morna, Erik, 1969-
2004-01-01
Heliplaatidest: Tori Amos "Tales Of A Librarian: A Tori Amos Collection", Madonna "Remixed & Revisited", No Doubt "The Singles 1992-2003", Basement Jaxx "Kish Kash", Erykah Badu "Worldwide Underground"
Torus bifurcations in multilevel converter systems
DEFF Research Database (Denmark)
Zhusubaliyev, Zhanybai T.; Mosekilde, Erik; Yanochkina, Olga O.
2011-01-01
embedded one into the other and with their basins of attraction delineated by intervening repelling tori. The paper illustrates the coexistence of three stable tori with different resonance behaviors and shows how reconstruction of these tori takes place across the borders of different dynamical regimes....... The paper also demonstrates how pairs of attracting and repelling tori emerge through border-collision torus-birth and border-collision torus-fold bifurcations. © 2011 World Scientific Publishing Company....
Directory of Open Access Journals (Sweden)
Andreea ARSENE
2010-03-01
Full Text Available Globalization process has determined a lot of changes at an individual level. These changes arereflected in the modern family profile, which creates individuals able to accomplish the goal ofglobalization. Thus, young people from the Romanian society, take as a goal, the opportunity ofliving the country, during or after they finish their studies, for studying or for working in Westerncountries. This paper tries to analyze the migration of population phenomenon, from economicunstable areas to economic economic stable areas, and, also, the impact of this phenomenon ontheir families.
英国保守派认为:综合诊所将威胁1700个全科诊所的生存%Tories say polyclinics threaten 1700 practices
Institute of Scientific and Technical Information of China (English)
Lynn Eaton; 苏丹
2008-01-01
英国反对党领袖David Cameron说：“综合诊所可能将会使1000多个伦敦诊所关门大吉，这个数量超过了首都诊所总数的3／4，同时它还可能使英格兰其他地区600多个诊所倒闭。”
Institute of Scientific and Technical Information of China (English)
王波; 吕静
2015-01-01
目的：观察小儿反复呼吸道感染经捏脊疗法治疗的临床效果，为临床今后治疗提供参考。方法选择2014年2月~2015年2月中国中医科学院附属广安门医院收治的67例反复呼吸道感染患儿作为研究对象，根据不同治疗方法将其分为捏脊组35例，常规组32例。常规组予以常规药物治疗，捏脊组在常规组基础上结合捏脊疗法。比较两组患儿疗效。结果捏脊组总有效率为97.1%，高于常规组的81.3%，差异有统计学意义(P<0.05)；捏脊组发病次数改善率为85.7%，高于常规组(46.8%)，差异有高度统计学意义(P<0.01)；捏脊组平均病程改善率为77.1%，高于常规组的37.5%，差异有高度统计学意义(P<0.01)。结论捏脊疗法能提高小儿反复性呼吸道感染的临床疗效，且无创、安全、操作简便，患儿更易接受，值得临床应用和进一步研究。%Objective To observe the clinical effect of chiropractic therapy on children with recurrent respiratory tract infection, and provide reference for clinical treatment in the future. Methods From February 2014 to February 2015, 67 cases of children with recurrent respiratory tract infection who were treated in Guang'anmen Hospital, China Acade-my of Chinese Medical Sciences as the research object, according to the different treatment methods they were divided into the chiropractic group (35 cases) and conventional group (32 cases). Children of the conventional group were treat-ed with routine therapy, and children of the chiropractic group were given chiropractic therapy on the basis of conven-tional group. Curative effect of two groups was compared. Results The total effective rate of the chiropractic group was 97.1%, higher than the conventional group (81.3%), the difference was statistically significant (P< 0.05); the improve-ment rate of chiropractic group was 85.7%, higher than the conventional group (46.8%), the difference was statistically significant (P<0.01);the improvement rate of mean duration in the chiropractic group the was 77.1%, higher than the conventional group (37.5%), the difference was statistically significant (P<0.01). Conclusion Chiropractic therapy can improve the clinical efficacy in children with recurrent respiratory tract infection, noninvasive, safe, easy to operate, children are more likely to accept, is worthy of clinical application and further study.
Institute of Scientific and Technical Information of China (English)
张志超; 赵博光
2013-01-01
研究了黑松（ Pinus thunbergii）木屑不同含水量对松材线虫（ Bursahpe lenchus xylohp ilus）繁殖的影响，确定了适于线虫繁殖的最佳含水量，并以黑松木屑作为试验介质，模拟松材线虫生活条件，测定了杀线剂α-三噻吩（α-T）对松材线虫的毒力。结果表明：当黑松木屑相对含水量达到50％时最有利于松材线虫繁殖；α-T对松材线虫具有非常强的毒性，毒力回归方程为Y＝14．589＋18．720x，半致死质量分数为1．892μgg/。%An experiment was conducted to measure nematicidal activity of pine wood nematodes ( Bursaphle enchus xylophilus) with sawdust of black pine ( Pinus thunbergii) , and determine the best relative water content ( RWC) of the sawdustto culture pine wood nematodes and bioassay the nematicidal activity of α-T by the method.50% of RWC is best suitable condition toculture pine wood nematodes, and bythe regression equation of α-T against pine wood nematodes under the light intensity of 10 000 Lux, the toxicity regression equation is Y=14.589+18.720x, and the medial lethal concentration is LC50=1.892μg/g.
Energy Technology Data Exchange (ETDEWEB)
Richman, M.
1996-08-01
Granular flows of nearly elastic, identical spheres down bumpy inclines are described. A numerical technique is developed to overcome the difficulties associated with the ill-defined `tops` of these flows.
1979-12-01
Mnufactures agricultura icne obanedo n and UK IStansard technology, cent to Anuasaies:S imlens bumpiing antdrn o0gncltrl aipet broke eopand laboratory... Agricultura Science Educational Economic & Industrial Resources Resources Miritime Science Informt Information Administrat e nformatio nformatfoj
Simple neoclassical point model for transport and scaling in EBT
Energy Technology Data Exchange (ETDEWEB)
Hedrick, C.L.; Jaeger, E.F.; Spong, D.A.; Guest, G.E.; Krall, N.A.; McBride, J.B.; Stuart, G.W.
1977-04-01
A simple neoclassical point model is presented for the ELMO Bumpy Torus experiment. Solutions for steady state are derived. Comparison with experimental observations is made and reasonable agreement is obtained.
Willmore energy estimates in conformal Berger spheres
Energy Technology Data Exchange (ETDEWEB)
Barros, Manuel, E-mail: mbarros@ugr.es [Departamento de Geometria y Topologia, Facultad de Ciencias Universidad de Granada, 1807 Granada (Spain); Ferrandez, Angel, E-mail: aferr@um.es [Departamento de Matematicas, Universidad de Murcia Campus de Espinardo, 30100 Murcia (Spain)
2011-07-15
Highlights: > The Willmore energy is computed in a wide class of surfaces. > Isoperimetric inequalities for the Willmore energy of Hopf tori are obtained. > The best possible lower bound is achieved on isoareal Hopf tori. - Abstract: We obtain isoperimetric inequalities for the Willmore energy of Hopf tori in a wide class of conformal structures on the three sphere. This class includes, on the one hand, the family of conformal Berger spheres and, on the other hand, a one parameter family of Lorentzian conformal structures. This allows us to give the best possible lower bound of Willmore energies concerning isoareal Hopf tori.
Ekspertarvamuse refereering VTA 4. juuni 2012 otsuse kohta / Heldur Peterson
Peterson, Heldur, 1956-
2012-01-01
Eesti Hobusekasvatajate Selts võitleb ühtse tori hobuse tõu eest ja nõuab Veterinaar- ja Toiduameti peadirektori 4. juuni 2012 otsuse nr. 208 tühistamist ja MTÜ Vana-Tori Hobuse Ühingu mittetunnustamist
KAM theory : The legacy of Kolmogorov's 1954 paper
Broer, Henk W.
2004-01-01
Kolmogorov-Arnold-Moser (or KAM) theory was developed for conservative dynamical systems that are nearly integrable. Integrable systems in their phase space usually contain lots of invariant tori, and KAM theory establishes persistence results for such tori, which carry quasi-periodic motions. We sk
Institute of Scientific and Technical Information of China (English)
李风波
2015-01-01
目的：探讨不同通气模式在重症肺源性心脏病呼吸衰竭中的应用效果。方法选取本院2011年1月~2014年1月收治的50例重症肺源性心脏病呼吸衰竭患者，随机分为观察组和对照组，每组25例。两组患者均给予常规处理，观察组实施有创-无创序贯通气，对照组行有创通气。观察两组治疗过程中的呼吸、血压、动脉血气指标改变情况；记录机械通气时间和住院时间。结果观察组呼吸频率、动脉收缩压、心率、氧分压、二氧化碳分压、pH值分别与对照组比较，差异无统计学意义(P>0.05)。观察组患者机械通气时间和住院时间短于对照组，呼吸机相关肺炎发生率低于对照组，差异有统计学意义(P0.05).The mechanical ventilation and hospitalization time in the observation group was shorter than that of control group,the incidence of ventilator associated pneumonia was lower than that in the control group,the difference was significant (P<0.05). Conclusion Sequential invasive-non-invasive mechanical ventilation on patients severe respiratory failure due to pulmonary heart disease has significant ef-fect,which can shorten the time of hospitalization and reduce ventilator complications,the therapy is worthy of reference.
Institute of Scientific and Technical Information of China (English)
徐律
2015-01-01
目的：探讨宫-腹腔镜联合诊治难治性多囊卵巢综合征合并不孕的必要性和疗效。方法选择多囊卵巢综合征（PCOS）合并不孕患者80例，按随机数字表法分为两组各40例，研究组使用宫-腹腔镜联合诊治，对照组仅单纯使用腹腔镜诊治。比较两组手术前后卵巢、卵泡及血清激素水平变化情况，同时记录两组术后正常排卵率、妊娠率及流产率。结果研究组术后卵泡个数及卵巢体积均较治疗前明显下降，且明显低于对照组，差异均有统计学意义（t ＝3．82、3．80、3．74、3．75，均 P ＜0．05）。研究组术后血清 T、LH 及 LH／FSH 较术前明显降低，且明显低于对照组，差异均有统计学意义（t ＝9．32、4．06、3．80，均 P ＜0.05）。研究组术后正常排卵率、妊娠率及流产率分别为90．0％、62．5％及7．5％，与对照组的72．5％、50．0％及15．0％差异均有统计学意义（χ2＝4．02、4．10、3．90，均 P ＜0．05）。结论宫-腹腔镜联合诊治 PCOS 合并不孕疗效显著，可有效提高患者术后排卵率及妊娠率，并降低自然流产率，值得临床推广应用。%Objective To investigate the effect and necessity of hysteroscopy combined with laparoscopy in the diagnosis and treatment of refractory polycystic ovarian syndrome complicated with infertility.Methods 80 cases of patients with polycystic ovary syndrome (PCOS)combined with infertility were randomly divided into two groups with 40 cases in each group.The testing group used hysteroscopy combined with laparoscopy in diagnosis and treatment while the laparoscopy was only used in the control group.The changes of ovary,ovarian follicles and serum hormone level of the two groups which before and after operation were compared,and the data of postoperative normal ovulation rate,pregnancy rate and abortion rate of the two groups were recorded.Results The follicle number and ovarian volume of the testing group were significantly decreased than that before treatment,and were significantly lower than that of the control group,with statistical difference (t =3.82,3.80,3.74,3.75,all P <0.05).The serum T,LH and LH/FSH of the testing group were significantly decreased than the data before surgery,and were significantly lower compared to the control group with statistical difference (t =9.32,4.06,3.80,all P <0.05).The normal ovulation rate,pregnancy rate and abortion rate of the testing group were significantly higher compared to the control group (90.0%,62.5% and 7.5% vs.72.5%,50% and 15%)χ2 =4.02,4.10,3.90,all P <0.05).Conclusion Hyste-roscopy combined with laparoscopy has an obvious curative effect in the diagnosis and treatment of polycystic ovary syndrome combined with infertility,which can effectively improve ovulation rate and pregnancy rate and reduce the abortion rate,is worthy of clinical application.
Institute of Scientific and Technical Information of China (English)
甄卓; 刘朝英; 宋哲英; 宋雪玲
2016-01-01
The robot vision technology was applied to the target location of the 3-DOF parallel manipulator, and a mathematical model of the position inverse solution for the manipulator with 3-DOF was established. The LabVIEW software was used for programming and Matlab software was used to simulate the manipulator trajectory planning algorithm, thus the simulation of the whole working process of the grasping task was implemented. Finally, the prototype of 3-DOF parallel manipulator was made and tested. By comparing the experimental data with the theoretical design, the correctness of the theoretical analysis and model is proved. It is also proved that the introduction of machine vision technology can increase the intelligent level and positioning precision of the parallel manipulator.%将机器视觉技术应用到三自由度并联机械手的目标定位中,建立了三自由度并联机械手位置逆解的数学模型. 采用LabVIEW软件编写上位机程序,并运用Matlab软件对机械手轨迹规划的算法进行仿真,完整地模拟出了机械手完成抓取任务的整个工作过程. 最后,完成了样机的制作,并对样机进行了测试. 通过将实验数据与理论设计进行对比,可以有效地证明理论分析和模型建立的正确性,同时也进一步证明引入机器视觉技术可以提高并联机械手的智能化和定位的精准化.
Institute of Scientific and Technical Information of China (English)
陆芬
2014-01-01
AIM:To explore the possible mechanism of the lung surface active substance protein B (SP-B)in neonatal respiratory distress syndrome (RDS ).METHODS:Selected from Septem-ber 201 1 to September 201 3,63 cases of unrelated newborns dy-ing of RDS were set as RDS group,of which there were 31 weeks or less group,32~36 weeks group and 37 weeks or more group, 21 cases in each group;63 cases of newborn,unrelated,death from other diseases,were set as the control group,to match the gestational age with the RDS group at 1 ∶1 .RESULTS:RDS group,lung SP-BmRNA positive cells number did not increase with the increase of gestational age,whereas the control lung SP-BmRNA positive cells number increased with the increase of ges-tational age.SP-BmRNA positive expression cells in RDS group were obviously lower than the control group.Defect frequency of B protein in RDS group was 1 4.29%,significantly higher than the control group's 1 .59%;RDS group's SP-BmRNA defect frequency was 42.86%,which was also significantly higher than the control group's 7.94%.CONCLUSION:SP-BmRNA defects involved in the pathogenesis of RDS.%目的：探讨肺表面活性物质蛋白B（SP-B）参与新生儿呼吸窘迫综合征（RDS ）发病的可能机制．方法：选取我院2011-09/2013-09收治的63例因RDS死亡且无血缘关系的新生儿为RDS组，分为32周以下组、32～36周组及36周以上组，每组各21例；选取我院收治的63例无血缘关系的非RDS而死亡的新生儿为对照组，分组方式与 RDS 组以1∶1相对应．结果：RDS组中，肺部表面活性物质蛋白B（SP-B）mRNA阳性的细胞数量随胎龄增加保持不变，而对照组中，肺部表面活性物质蛋白B（SP-B）mRNA阳性的细胞数量随胎龄增加而升高．RDS组肺部表面活性物质蛋白B（SP-B）mRNA阳性的细胞数水平显著小于对照组．RDS组肺表面活性物质蛋白SP-B缺陷频率为14．29％，明显大于对照组（1．59％）；RDS组肺表面活性物质蛋白SP-BmRNA缺陷频率42．86％，也明显大于对照组7．94％．结论：SP-BmRNA的缺失也是引发RDS病的因素之一．
Institute of Scientific and Technical Information of China (English)
刘璟洁; 韩萍; 高震; 巩付华; 马晓灵; 向莉
2016-01-01
Objectives To compare clinical manifestations and electrophysiological features in patients with chron⁃ic inflammatory demyelinating polyneuropathy (CIDP) and Type-I Charcot Marie Tooth Disease (CMT-I) for guiding dif⁃ferential diagnosis. Methods Data including clinical manifestations and electrophysiological indexes was collected from thirty-one CIDP cases and 28 CMT-I cases. Correlation analysis was used to assess the association of the severity of electrophysiology with the severity of clinical symptoms. Results There were statistically significant differences in onset site, sensory dysfunction, foot deformity and cerebrospinal fluid protein between these two groups (P0.05). Conclusions Differential diagnoses of CIDP and CMT-I can be made based on clinical manifestations and electro⁃physiological features.%目的：比较慢性炎性脱髓鞘性多发性神经病（chronic inflammatory demyelinating polyneuropathy, CI⁃DP）与腓骨肌萎缩症-I型（type-I Charcot Marie Tooth disease,CMT-I）的临床及神经电生理特点，以指导两者的鉴别诊断。方法纳入CIDP患者31例、CMT-I患者28例，收集其一般临床资料并对两组患者进行神经电生理检测，比较两组患者的临床特点及电生理指标，并对电生理严重程度与临床症状严重程度进行相关性分析。结果CIDP与CMT-I两组患者起病部位、主观感觉障碍、足部畸形、脑脊液蛋白比较有统计学差异(P<0.05)。运动末梢潜伏期（distal motor latency, DML）、运动传导速度（motor conduction velocity, MCV）、感觉传导速度（sensory conduction velocity, SCV）、传导阻滞/波形离散、下肢神经继发性轴索变性具有统计学差异(P<0.05)。失神经电位、MUAP形态异常、募集减少具有统计学差异(P<0.05)。CIDP临床症状严重程度与电生理严重程度有相关性(r=0.84, P<0.05)；而CMT-I临床症状严重程度与电生理严重程度分离，不具有相关性(r=0.27, P＞0.05)。结论综合分析临床特点、神经传导、针极肌电图、临床与电生理严重程度的相关性可以对CIDP与CMT-1进行鉴别诊断。
Institute of Scientific and Technical Information of China (English)
Ketan Shank ardass; Emilie Renahy; Carles Muntaner; Patricia O'Campo
2015-01-01
To address macro-social and economic determinants of health and equity, there has been growing use of intersectoral action by governments around the world. Health in All Policies ( HiAP) initiatives are a special case where governments use cross-sectoral structures and relationships to systematically address health in policymaking by targeting broad health determinants rather than health services alone. Although many examples of HiAP have e-merged in recent decades, the reasons for their successful implementation-and for implementation failures-have not been systematically studied. Consequently, rigorous evidence based on systematic research of the social mechanisms that have regularly enabled or hindered implementation in different jurisdictions is sparse. We describe a novel meth-odology for explanatory case studies that use a scientific realist perspective to study the implementation of HiAP. Our methodology begins with the formulation of a conceptual framework to describe contexts, social mechanisms and out-comes of relevance to the sustainable implementation of HiAP. We then describe the process of systematically explai-ning phenomena of interest using evidence from literature and key informant interviews, and looking for patterns and themes. Finally, we present a comparative example of how Health Impact Assessment tools have been utilized in Swe-den and Quebec to illustrate how this methodology uses evidence to first describe successful practices for implementa-tion of HiAP and then refine the initial framework. The methodology that we describe helps researchers to identify and triangulate rich evidence describing social mechanisms and salient contextual factors that characterize successful prac-tices in implementing HiAP in specific jurisdictions. This methodology can be applied to study the implementation of HiAP and other forms of intersectoral action to reduce health inequities involving multiple geographic levels of govern-ment in diverse settings.%目前,世界各国普遍采取跨部门行动解决健康的宏观社会和经济决定因素. "将健康融入所有政策( HiAP)"是各国采取跨部门行动的策略之一,它以广义的健康决定因素而非单纯的卫生服务为目标,在决策过程中系统解决健康问题. 近几十年来出现了很多关于HiAP的案例,但这些案例成功或失败的原因并未得到系统的研究,这就导致以证据为基础的有关促进或阻碍HiAP策略实施的相关因素的研究较少. 本文基于现实主义视角,采用解释性案例研究,分析了不同地区HiAP策略的实施情况. 本研究在提出概念性框架的基础上,分析了与HiAP可持续实施有关的背景、社会机制及结果,并利用相关文献以及从关键知情人访谈中得到的证据,寻找相关的模式和主题对现象加以解释. 最后,通过对瑞典和加拿大魁北克实施卫生影响力评估的情况进行比较,揭示了HiAP成功实施的经验. 此方法能够帮助研究者对某一地区内成功实施HiAP的社会机制和背景因素的大量证据信息加以审核并做三角测量,还可用于分析其他形式的部门间行动,以减少不同背景、不同地区之间的卫生不公平性现象.
Roberson, LM; Coyer, JA
2004-01-01
The southern sea palm kelp Eisenia arborea produces wide, bullate (bumpy) blades in low-flow areas, whereas in adjacent high-flow areas blades are flat and narrow. Here we determine if morphological differences in these 2 closely associated populations are correlated with physical factors in the env
Issues Confront the Macroeconomy
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
This year,China’s macroeconomy will face several particular questions:What will China do to restructure its economy and transform its growth model? Will the ongoing recovery be as bumpy as last year? Will soaring housing prices be successfully checked? Will the inflation rate become lower in the second half than the first as expected?
RAYS: a geometrical optics code for EBT
Energy Technology Data Exchange (ETDEWEB)
Batchelor, D.B.; Goldfinger, R.C.
1982-04-01
The theory, structure, and operation of the code are described. Mathematical details of equilibrium subroutiones for slab, bumpy torus, and tokamak plasma geometry are presented. Wave dispersion and absorption subroutines are presented for frequencies ranging from ion cyclotron frequency to electron cyclotron frequency. Graphics postprocessors for RAYS output data are also described.
Harvard Education Letter. Volume 23, Number 3, May-June 2007
Chauncey, Caroline, Ed.
2007-01-01
"Harvard Education Letter" is published bimonthly by the Harvard Graduate School of Education. This issue of "Harvard Education Letter" contains the following articles: (1) The Road to School Improvement: It's Hard, It's Bumpy, and It Takes as Long as It Takes (Richard F. Elmore and Elizabeth A. City); (2) Better Teaching with Web Tools: How…
The Development of a New Doctoral Degree Program to Serve an Adult Audience: Georgetown University
O'Callaghan, Phyllis
2011-01-01
The road to a new degree program is rarely smooth. The author describes the lengthy and bumpy path to the successful creation of and approval for the first nontraditional doctorate offered at Georgetown University, the Doctor of Liberal Studies Degree (DLS). The new Doctor in Liberal Studies (DLS) required applicants to have a master's degree or…
Institute of Scientific and Technical Information of China (English)
David; Dollar; Khalid; Malik
2009-01-01
In the wake of the bumpy ride in 2008, where will the Chinese economy go in the midst of the global financial turmoil, and how will it fend off the devastating effects of an international economic recession? Beijing Review interviewed 10 economists and experts to get their insights about China’s economic prospects this year.
Institute of Scientific and Technical Information of China (English)
1997-01-01
CHEN Shuiyue is a tea producer in Shengzhou, Zhejiang Province, the biggest tea production and export base in China. One day last September, accompanied by two staff members from the local women’s federation, I visited Chen Shuiyue’s holne. Traveling along a bumpy road, we arrived at Yingguiyan Village, in Chongren County,
Huyghe, Eric; Zairi, Anas; Nohra, Joe; Kamar, Nassim; Plante, Pierre; Rostaing, Lionel
2007-04-01
The immunosuppressive agents target of rapamycin inhibitors (TOR-I) (sirolimus, and everolimus) have been widely used in kidney transplantation for >10 years. Up to 40% of men receiving a kidney transplant are younger than 50, and fertility as well as erectile function are major concerns. In this review, we provide a synopsis of past studies focusing on gonadal function in men treated with TOR-I, mainly sirolimus, to establish what impact they have on male gonads, and which pathophysiological pathways are involved. A PubMed search for the years 1990-2006 selected articles that focused on the gonadal impact of TOR-I. Primary outcome measures were testosterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH) levels. Secondary outcome measures were sexual function, fertility status and sperm parameters. Treatment with TOR-I results in a decrease in testosterone level, and an opposite increase in LH. Moreover, spermatogenesis seems to be disrupted by TOR-I and FSH levels are increased. Sirolimus and everolimus inhibit the activity of mammalian targets of rapamycin, a serine/threonine kinase involved in numerous cell-growth processes. Molecular mechanisms of action of TOR-I on the testis involve inhibition of a stem cell factor/c-kit-dependant process in spermatogonia. Preliminary results appear to show that TOR-I treatment has deleterious actions on the testis and impairs gonadal function after renal transplantation, but the impact of these effects are unknown.
Partial Dynamical Symmetry and Mixed Dynamics
Leviatan, A
1996-01-01
Partial dynamical symmetry describes a situation in which some eigenstates have a symmetry which the quantum Hamiltonian does not share. This property is shown to have a classical analogue in which some tori in phase space are associated with a symmetry which the classical Hamiltonian does not share. A local analysis in the vicinity of these special tori reveals a neighbourhood of phase space foliated by tori. This clarifies the suppression of classical chaos associated with partial dynamical symmetry. The results are used to divide the states of a mixed system into ``chaotic'' and ``regular'' classes.
A KAM-type Theorem for Generalized Hamiltonian Systems
Institute of Scientific and Technical Information of China (English)
LIU BAI-FENG; ZHU WEN-ZHUANG; XU LE-SHUN; Li Yong
2009-01-01
In this paper we mainly concern the persistence of lower-dimensional invariant tori in generalized Hamiltonian systems. Here the generalized Hamiltonian systems refer to the systems which may admit a distinct number of action and angle variables. In particular, system under consideration can be odd dimensional. Under the Riissmann type non-degenerate condition, we proved that the majority of the lower-dimension invariant tori of the integrable systems in generalized Hamiltonian system are persistent under small perturbation. The surviving lower-dimensionai tori might be elliptic, hyperbolic, or of mixed type.
Non-adiabatic holonomy operators in classical and quantum completely integrable systems
Giachetta, G; Sardanashvily, G
2002-01-01
Given a completely integrable system, we associate to any connection on its invariant tori fibred over a parameter manifold the classical and quantum holonomy operator (generalized Berry's phase factor), without any adiabatic approximation.
Lifescience Database Archive (English)
Full Text Available 1 ANTIINFLAMMATORY AND ANTIRHEUMATIC PRODUCTS M01A ANTIINFLAMMATORY AND ANTIRHEUMATIC PRODUCTS, NON-STEROIDS M01AX Other antiinflamma...tory and antirheumatic agents, non-steroids M01AX18 Fepr
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Full Text Available TORY AND ANTIRHEUMATIC PRODUCTS, NON-STEROIDS M01AE Propionic acid derivatives M01AE51 Ibuprofen, combinat...ions D10449 Ibuprofen - scopolamine butylbromide mixt PubChem: 172232542 ...
Directory of Open Access Journals (Sweden)
Mauritz van den Worm
2013-02-01
Full Text Available We replace the classical string theory notions of mapping between parameter space and world-time with noncommutative tori mapping between these spaces. The dynamics of mappings between different noncommutative tori are studied and noncommutative versions of the Polyakov action and the Euler-Lagrange equations are derived. The quantum torus is studied in detail, as well as C*-homomorphisms between different quantum tori. A finite dimensional representation of the quantum torus is studied, and the partition function and other path integrals are calculated. At the end we prove existence theorems for mappings between different noncommutative tori.
Valme, Valner, 1970-
2002-01-01
Uutest plaatidest "30 Seconds To Mars", E-Rotic "Sexual Healing", Mandarava & Buchert "Feng Shui", Vanessa Mae "The Best Of", Leann Rimes "Twisted Angel" Xzibit "Man vs Mashine", India. Airie "Voyage To India", Tori Amos "Scarlet Walk"
Koppel, Annika
2003-01-01
Heliplaatidest: "Careful What You Wish For", Sophie Ellis Bextor "Shoot From The Hip", Josh Groban "Closer", Tori Amos "Tales Of Librarian", Enigma "Voyageur", Eesti Filharmoonia Kammerkoor, dirigent Paul Hillier "The Powers Of Heaven"
Energy Technology Data Exchange (ETDEWEB)
1994-10-01
This volume contains appendices for the following: Overview of improved oil recovery methods (enhanced oil recovery methods and advanced secondary recovery methods); Benefits of improved oil recovery, selected data for the analyzed states; and List of TORIS fields and reservoirs.
Tõnu Kaalep kuulab plaate,mille autoriks on naised / Tõnu Kaalep
Kaalep, Tõnu, 1966-
2001-01-01
Heliplaatidest: Tori Amos "Strange Little Girls", Suzanne Vega "Songs in Red and Gray", Tracy Chapman "Collection", Sandy Dillon & Hector Zazou "12 (Las Vegas is Cursed)", Anja Garbarek "Smiling & Waving"
Kool kutsub sauna, lõunatama, surfama, sportima / Silvi Kanošina
Kanošina, Silvi
2007-01-01
Selja Algkooli, Koonga Põhikooli, Paikuse Põhikooli, Tihemetsa põhikooli, Kergu Põhikooli, Tõstamaa Keskkooli, Häädemeeste Keskkooli, Tori Põhikooli, Vahenurme Lasteaed-Algkooli ja Aruvälja Lasteaed-Algkooli mitmekesisest tegevusest
Lifescience Database Archive (English)
Full Text Available methasone (JP16/USP/INN) Betamethasone D00244 Betamethasone (JP16/USP/INN) Betamethasone D00244 Betamethasone (JP16/USP/INN) Inflamma...tory Bowel Disease Agents Glucocorticoids Betamethasone
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Full Text Available 18400190 Cytokine signaling modules in inflammatory responses. O'Shea JJ, Murray PJ...tory responses. PubmedID 18400190 Title Cytokine signaling modules in inflammatory responses. Authors O'Shea JJ, Murray
Packing of charged chains on toroidal geometries
Yao, Zhenwei; de la Cruz, Monica Olvera
2013-01-01
We study a strongly adsorbed flexible polyelectrolyte chain on tori. In this generalized Thomson problem, the patterns of the adsorbed chain are analyzed in the space of the toroidal coordinates and in terms of the orientation of each chain segment. Various patterns are found, including double spirals, disclination-like structures, Janus tori, and uniform wrappings, arising from the long-range electrostatic interaction and the toroidal geometry. Their broken mirror symmetry is quantitatively characterized by introducing an order parameter, an integral of the torsion. The uniform packing, which breaks the mirror symmetry the least, has the lowest value of the order parameter. In addition, it is found that the electrostatic energy of confined chains on tori conforms to a power law regardless of the screening effect in some typical cases studied. Furthermore, we study random walks on tori that generate chain configurations in the large screening limit or at large thermal fluctuation; some features associated with the toroidal geometry are discussed.
Lotman, Jüri F.
2004-01-01
Uutest plaatidest Lil Jon & The East Side Boys "Kings of Crunk", Tori Amos "Tales Of A librarian", rebekka Bakken "The Art Of How To Fall", Slow Train Soul "Illegal Cargo", Marcos Valle "Contrasts", The beatles "Let It Be...Naked"
Non recursive proof of the KAM theorem Report-no 93-4-FISROM
Gallavotti, G; Gallavotti, Giovanni; Gentile, Guido
1993-01-01
Abstract: A selfcontained proof of the KAM theorem in the Thirring model is discussed, completely relaxing the ``strong diophantine property'' hypothesis used in previous papers. Keywords: \\it\\ KAM, invariant tori, classical mechanics, perturbation theory, chaos
Reference: 379 [Arabidopsis Phenome Database[Archive
Lifescience Database Archive (English)
Full Text Available tory light signals often interact with other environmental cues. Exposure of etio...me example of cross-talk between environmental signalling systems. Here, we report the isolation the mutant
Directory of Open Access Journals (Sweden)
Rodney T. Imamura
2007-10-01
Full Text Available The purpose of this study was to compare the kinematics of kuzushi/tsukuri (KT phases of the harai-goshi throw under competitive and non-competitive conditions. A third degree black belt subject served as the tori (thrower for both conditions. Two black belt participants ranked as first degree and fourth degree served as the uke (faller for the competitive and non-competitive conditions, respectively. Two video cameras (JVC 60 Hz and a three dimensional motion analysis system (Vicon-Peak Performance Technologies, Inc., Englewood, CO were used to collect and analyze peak velocity for the center of mass (COM of uke and tori and peak angular velocity of tori's trunk (TAV. Data were smoothed using a 4th order zero lag Butterworth filter with a cut-off frequency set by the Peak software optimization technique. All variables were normalized by time as a percentage of the KT phase. In general, the COM directional velocity patterns were similar between conditions. Uke's defensive efforts during the competitive condition created differences in timing and magnitude of peak COM and TAV velocities. During competition, tori created larger peak COM velocities onto uke which indicated greater throwing power. Peak velocities for tori's COM were larger during the non-competitive condition since uke's resistance was minimal. Findings of the competitive condition suggested that mediolateral COM movement towards tori's pulling (left hand can be an ideal set-up movement prior to execution. Tori's TAV was also greater during the competitive condition. Two distinct TAVs were observed, a counterclockwise TAV created by tori turning their hips during the entrance of the throw and a clockwise TAV created by the shoulders turning to complete the 180 degree body turn with the simultaneous leg sweep. It is thought that the counterclockwise rotation aids in producing a pre-stretch of trunk muscles which helps to create greater trunk rotation power
Institute of Scientific and Technical Information of China (English)
路妍; 张建华
2015-01-01
目的：观察急性心肌梗死患者行择期经皮冠状动脉介入治疗（PCI）术后外周血单核细胞Toll样受体4（ TLR4）表达变化，同时观察瑞舒伐他汀强化治疗对TLR4及炎性因子的影响。方法选取急性心肌梗死患者90例为病例组。同期进行健康体检的正常人70例为对照。采用Real time－PCR和Western blot测定外周血单核细胞TLR4 mRNA和蛋白表达。采用Gensini评分判定冠脉病变严重程度。病例组随机分为治疗A组和治疗B组，每组45例，2组均接受常规治疗，治疗B组在常规治疗基础上于PCI术前7 d给予口服瑞舒伐他汀10 mg／d。观察2组术前、术后7 d左心室射血分数（ LVEF）、左心室收缩末期内径（ LVESD）、左心室舒张末期内径（ LVEDD）、TLR4 mRNA和蛋白表达及hs－CRP、TNF－α、IL－6水平变化。结果（1）对照组比较，病例组外周血单核细胞TLR4mRNA和蛋白表达显著升高，差异有统计学意义（ P ＜0．05）。且随着冠脉病变严重程度增加，外周血单核细胞TLR4 mRNA和蛋白表达逐渐升高，差异有统计学意义（ P ＜0．05）。相关性分析显示，外周血单核细胞TLR4 mRNA和蛋白表达与冠脉病变严重程度具有正相关性（ P ＜0．05）。（2）病例组治疗后与术前比较，术后7 d治疗A组和治疗B组LVEF均显著升高，差异有统计学意义（ P ＜0．05），且治疗B组显著高于同期治疗A组（ P ＜0．05）。术后7 d治疗A组和治疗B组LVESD、LVEDD、TLR4 mRNA和蛋白表达、hs－CRP、TNF－α、IL－6水平均显著降低，差异有统计学意义（ P ＜0．05），且治疗B组显著低于同期治疗A组（ P ＜0．05），差异有统计学意义（ P ＜0．05）。结论急性心肌梗死患者行择期PCI术前短期应用瑞舒伐他汀能够显著改善心功能，其机制与抑制TLR4炎症信号通路激活有关。%Objective To observe the change of Toll-like receptor 4 ( TLR4) in acute myocardial infarction ( AMI) patients undergoing selective percutaneous coronary intervention ( PCI ) and to investigate the effects of rosuvastatin on Toll-like receptor 4 expression in peripheral blood monouclear cell and on inflammatory factor.Methods A total of 90 patients with AMI treated by PCI were enrolled in the study .Meanwhile 70healthy subjects were served as control group .Real time-PCR and Western Blot were used to detect the expression levels of TLR 4 mRNA and protein.Gensini score was used to evaluate the severity of coronary artery lesions .The 90patients were randomly divided into two groups :group A and group B, with 45 patients in each group.The patients in both groups received routine therapy ,however,the patients in group B,on the basis of routine therapy, were given orally rosuvastatin (10 mg/d) on 7 days before PCI.The changes of LVEF, LVESD, LVEDD, TLR4 mRNA and protein, hs-CRP, TNF-α, IL-6 were detected before surgery and on 7d after surgery.Results As compared with those in control group,the expression levels of TLR4 mRNA and protein were significantly increased in patients with AMI ( P <0.05).Moreover the expression levels of TLR4 mRNA and protein were gradually increased,with the increasing of severity of coronary lesions ( P <0.05).The correlation analysis showed that the expression levels of TLR4 mRNA and protein were positively correlated to the severity of coronary lesions ( P <0.05).As compared with that before therapy,LVEF in both treatemt groups were significantly increased on 7d after PCI ( P <0.05) ,furthermore, LVEF in group B was significantly higher than that in group A ( P <0.05 ) .The levels of LVESD, LVEDD, TLR4 mRNA and protein, hs-CRP, TNF-α, IL-6 in both treatment groups were significantly decereased on 7d after PCI,as compared with those before surgery ( P <0.05),moreover, which in group B were significantly lower than those in group A ( P <0.05).C onclusion The short-term application of rosuvastatin before elective PCI surgery in patients with AMI can obviously improve patient’ s cardiac funct
Institute of Scientific and Technical Information of China (English)
马桂兰
2016-01-01
"Emotional intelligence"dormitory culture emphasizes dormitory culture's mental health education function, emphasizes the dormitory culture's influence on the students' psychological quality. The article discussed the connotation and construction approaches of"emotional intelligence"dormitory culture's mental health approaches, investigated some students' psychological quality before and after the construction of psychological health culture of dormitory.%“情商型”宿舍文化强调宿舍文化的心理健康教育功能，强调宿舍文化对同学提高心理素质的影响。文章探讨了“情商型”宿舍心理健康文化的内涵与建设途径，调查了部分宿舍的同学在宿舍文化建设前后心理素质的变化情况。
The non-integrability of the Zipoy-Voorhees metric
Lukes-Gerakopoulos, Georgios
2012-01-01
The low frequency gravitational wave detectors like eLISA/NGO will give us the opportunity to test whether the supermassive compact objects lying at the centers of galaxies are indeed Kerr black holes. A way to do such a test is to compare the gravitational wave signals with templates of perturbed black hole spacetimes, the so-called bumpy black hole spacetimes. The Zipoy-Voorhees (ZV) spacetime (known also as the $\\gamma$ spacetime) can be included in the bumpy black hole family, because it can be considered as a perturbation of the Schwarzschild spacetime background. Several authors have suggested that the ZV metric corresponds to an integrable system. Contrary to this integrability conjecture, in the present article it is shown by numerical examples that in general ZV belongs to the family of non-integrable systems.
Nonintegrability of the Zipoy-Voorhees metric
Lukes-Gerakopoulos, Georgios
2012-08-01
The low frequency gravitational wave detectors like the evolved Laser Interferometer Space Antenna/New Gravitational Wave Observatory (eLISA/NGO) will give us the opportunity to test whether the supermassive compact objects lying at the centers of galaxies are indeed Kerr black holes. One way to do such a test is to compare the gravitational wave signals with templates of perturbed black hole spacetimes, the so-called bumpy black hole spacetimes. The Zipoy-Voorhees (ZV) spacetime (known also as the γ spacetime) can be included in the bumpy black hole family, since it can be considered as a perturbation of the Schwarzschild spacetime background. Several authors have suggested that the ZV metric corresponds to an integrable system. Contrary to this integrability conjecture, the present article shows by numerical examples that, in general, ZV belongs to the family of nonintegrable systems.
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
Women face gender discrimination in the job market Yi Rongrong,a postgraduate student at the Communication University of China in Beijing,describes her jobhunting process as a "bumpy road," though she has a good record in the university with quite a few scholarships and internship experiences at Xinhua News Agency and People’s Daily,two of the leading media organizations in China.
Moxham, Lorna; Dwyer, Trudy; Reid-Searl, Kerry
2013-01-01
The journey towards completion of a PhD is a bumpy one for many. One of the major factors that influence successful and on-time thesis completion is the relationship that the PhD candidate has with her or his supervisor. This paper presents results from research undertaken using a 12-item survey to collect data from a purposive sample: PhD…
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
China’s exports are tapering off as the world economy teeters,but investment and consumption have maintained momentum, offsetting the impact of weakening exports. The auto market continues cooling as the with drawal of policy incentives pours cold water on buyers’interest. A bright spot is the ecommerce sector, which reported surprisingly brisk growth in the third quarter. China’s industries are currently the world’s most competitive, but the road ahead will be a bumpy one.
Mora Alfonso, Sergio A; Rodríguez, Daniel M Cuestas; Londoño, John D; Valle-Oñate, Rafael; Quintana, Gerardo
2015-01-01
Introduction Adult-onset Still’s disease is a rare systemic inflammatory disorder of unknown aetiology characterized by the classic triad of persistent high spiking fevers, joint pain and a distinctive salmon-colored bumpy rash however, the multiorgan involvement can be present. Case description A 40-year-old woman previously healthy was referred to our hospital with 7 days of high fever and generalized arthralgia, The physical exam revealed angioneurotic edema detected on soles, palms and to...
Institute of Scientific and Technical Information of China (English)
无
2009-01-01
China’s economy passed over a bumpy road last year. Influenced by the global economic crisis, China faces many uncertainties in 2009. Yao Jingyuan, Chief Economist of the National Bureau of Statistics, gave a speech at the 2009 China Mining Merger and Acquisition Forum at Tsinghua University on January 10 about the risks the country faces and the positive factors that still exist in China’s economic development. Excerpts follow.
New Ultrasound Biomicroscopy Iris Findings in Juvenile Xanthogranuloma.
Syed, Zeba A; Chen, Teresa C
2016-08-01
We report a case of juvenile xanthogranuloma in a 12-month-old girl presenting with heterochromia, hyphema, and elevated intraocular pressure. This case demonstrates new ultrasound biomicroscopy iris findings of a generalized bumpy iris contour, suggesting diffuse heterogeneous involvement. This imaging finding has not been previously described. Untreated, iris juvenile xanthogranuloma may lead to corneal blood staining, glaucoma, and amblyopia. An understanding of the full range of ultrasound features of juvenile xanthogranuloma expands our appreciation for the clinical findings in this condition.
Institute of Scientific and Technical Information of China (English)
2006-01-01
Search engine giant’s path to China is proving to be a bumpy ride You have to hand it to Google; it knows how to make a big splash. When the doyen of search engines came to town to reinvent itself, no expense was spared. Booking the banquet hall of Beijing’s most famous five-star hotel, cramming it full of the cream of the IT world and a gaggle of journalists from 170 news agencies,
CRISIS FOCUS Risks and the Road To Recovery
Institute of Scientific and Technical Information of China (English)
无
2009-01-01
With global financial woes abating, the world economy appears to have found its footing. Emerging Asian economies have steered a steady course toward recovery while Western countries leave the worst times behind. But the road ahead may be a bumpy one given the fact that an array of underly- ing risks still loom large. Tao Dong, a senior economist with Credit Suisse, shared his opinions on these issues in an article recently published on his blog. Edited excerpts follow:
EVALUATION OF SEAT VIBRATION SOURCES IN DRIVING CONDITION USING SPECTRAL ANALYSIS
Directory of Open Access Journals (Sweden)
AHMAD KAMAL
2011-06-01
Full Text Available Seat vibration is one of the major causes of discomfort in moving vehicle. Tyre, engine, drivetrain and aerodynamic forces excite the cabin and interior through various pathways. In this paper, the contributions of tyre and engine vibration to seat excitations are studied. Virtual Source Analysis (VSA is implemented to decompose the source signals into incoherent phenomena. Studying these phenomena (virtual sources shows the amount and frequency bands that physical sources affect the seat vibration as the response channel. Experiment is conducted while riding on smooth and bumpy roads. Road roughness is characterized using International Roughness Index (IRI. VSA technique approve that tyre is the main source of seat vibration for the moving vehicle. Seat vibration has significant values below 400 Hz and tyre is found to be the dominant source of excitations for both smooth and bumpy roads. For smooth road, strong engine harmonics below 200 Hz also has some involvements. But in bumpy road, tyre vibration rise up and become the dominant broadband source of excitations. Tyre damper and engine mount Frequency Response Function (FRF analysis show that these parts are designed to be highly efficient below 1400 Hz and 200 Hz, respectively. These ranges are identical with those that were found as the critical operational frequency spans in VSA.
Symmetric Kullback-Leibler Metric Based Tracking Behaviors for Bioinspired Robotic Eyes.
Liu, Hengli; Luo, Jun; Wu, Peng; Xie, Shaorong; Li, Hengyu
2015-01-01
A symmetric Kullback-Leibler metric based tracking system, capable of tracking moving targets, is presented for a bionic spherical parallel mechanism to minimize a tracking error function to simulate smooth pursuit of human eyes. More specifically, we propose a real-time moving target tracking algorithm which utilizes spatial histograms taking into account symmetric Kullback-Leibler metric. In the proposed algorithm, the key spatial histograms are extracted and taken into particle filtering framework. Once the target is identified, an image-based control scheme is implemented to drive bionic spherical parallel mechanism such that the identified target is to be tracked at the center of the captured images. Meanwhile, the robot motion information is fed forward to develop an adaptive smooth tracking controller inspired by the Vestibuloocular Reflex mechanism. The proposed tracking system is designed to make the robot track dynamic objects when the robot travels through transmittable terrains, especially bumpy environment. To perform bumpy-resist capability under the condition of violent attitude variation when the robot works in the bumpy environment mentioned, experimental results demonstrate the effectiveness and robustness of our bioinspired tracking system using bionic spherical parallel mechanism inspired by head-eye coordination.
Schoen manifold with line bundles as resolved magnetized orbifolds
Energy Technology Data Exchange (ETDEWEB)
Groot Nibbelink, Stefan [Muenchen Univ. (Germany). Arnold Sommerfeld Center for Theoretical Physics; Vaudrevange, Patrick K.S. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
2012-12-15
We give an alternative description of the Schoen manifold as the blow-up of a Z{sub 2} x Z{sub 2} orbifold in which one Z{sub 2} factor acts as a roto-translation. Since for this orbifold the fixed tori are only identified in pairs but not orbifolded, four-dimensional chirality can never be obtained using standard techniques alone. However, chirality is recovered when its tori become magnetized. To exemplify this, we construct an SU(5) GUT on the Schoen manifold with Abelian gauge fluxes, which becomes an MSSM with three generations after an appropriate Wilson line is associated to its freely acting involution. We reproduce this model as a standard orbifold CFT of the (partially) blown down Schoen manifold with a magnetic flux. Finally, in analogy to a proposal for non-perturbative heterotic models by Aldazabal et al. we suggest modifications to the heterotic orbifold spectrum formulae in the presence of magnetized tori.
Novel routes to chaos through torus breakdown in non-invertible maps
DEFF Research Database (Denmark)
Zhusubaliyev, Zhanybai; Mosekilde, Erik
2009-01-01
The paper describes a number of new scenarios for the transition to chaos through the formation and destruction of multilayered tori in non-invertible maps. By means of detailed, numerically calculated phase portraits we first describe how three- and five-layered tori arise through period......-doubling and/or pitchfork bifurcations of the saddle cycle on an ordinary resonance torus. We then describe several different mechanisms for the destruction of five-layered tori in a system of two linearly coupled logistic maps. One of these scenarios involves the destruction of the two intermediate layers...... of the five-layered torus through the transformation of two unstable node cycles into unstable focus cycles, followed by a saddle-node bifurcation that destroys the middle layer and a pair of simultaneous homoclinic bifurcations that produce two invariant closed curves with quasiperiodic dynamics along...
Development of Refractory Technology in China‘s Iron and Steel Industry
Institute of Scientific and Technical Information of China (English)
LITingshou; PENGXigao
2000-01-01
Review on the development of refractories technology in China's iron and steel industry during the period of "the ninth five-year plan" has been made.Some sugges-tions and opinions on the future development of refractories science and technology in China has been put forward ,including full utilization of domestic rich resources of refrac-tory raw materials to develop sophisticated synthetic refrac-tory raw materials with Chinese characteristics and the R & D on high-tech refractory products for meeting the require-ment of the development of new metallurgical technology.
Comparative study between toroidal coordinates and the magnetic dipole field
Chávez-Alarcón, Esteban
2012-01-01
There is a similar behaviour between the toroidal coordinates and the dipole magnetic field produced by a circular loop. In this work we evaluate up to what extent the former can be used as a representation of the latter. While the tori in the toroidal coordinates have circular cross sections, those of the circular loop magnetic field are nearly elliptical ovoids, but they are very similar for large aspect ratios.The centres of the latter displace from the axis faster than the former. By making a comparison between tori of similar aspect ratios, we find quantitative criteria to evaluate the accuracy of the approximation.
Experimental Evidence for Sign Reversal of the Hall Coefficient in Three-Dimensional Metamaterials
Kern, Christian; Kadic, Muamer; Wegener, Martin
2017-01-01
Effectively inverting the sign of material parameters is a striking possibility arising from the concept of metamaterials. Here, we show that the electrical properties of a p -type semiconductor can be mimicked by a metamaterial solely made of an n -type semiconductor. By fabricating and characterizing three-dimensional simple-cubic microlattices composed of interlocked hollow semiconducting tori, we demonstrate that sign and magnitude of the effective metamaterial Hall coefficient can be adjusted via a tori separation parameter—in agreement with previous theoretical and numerical predictions.
Forced synchronization of quasiperiodic oscillations
Stankevich, N. V.; Kurths, J.; Kuznetsov, A. P.
2015-01-01
A model of a generator of quasiperiodic oscillations forced by a periodic pulse sequence is studied. We analyze synchronization when the autonomous generator demonstrates periodic, quasiperiodic, respective weakly chaotic oscillations. For the forced quasiperiodic oscillations a picture of synchronization, consisting of small-scale and large-scale structures was uncovered. It even includes the existence of stable the three-frequency tori. For the regime of weak chaos a partial destruction of this features and of the regime of three-frequency tori are found.
Structural Integrity of Water Reactor Pressure Boundary Components.
1981-02-20
RES-79-103 UNCLASSIFIED NRL--- 400 NURE-CR-17B3 NL mnmmnuunin -’El-.--. IIIIIIINI ., *q. - - ,aM T? * NUREG /CI 73 NIL Iteof AW, SOIituA 1 nert of Water...Progress Report for July-September 1979," NUREG /CR-1197, Oak Ridge National Labora- tory, Oak Ridge, Tn., Oct. 1978. 2. F. J. Loss, Ed., "Structural...Progress Report for April-June 1976," ORNL/ NUREG /TM-49, Oak Ridge National Labora- tory, Oak Ridge, Tn., Oct. 1976, pp. 27-38. 5. R. G. Berggren
Universality in the flooding of regular islands by chaotic states.
Bäcker, Arnd; Ketzmerick, Roland; Monastra, Alejandro G
2007-06-01
We investigate the structure of eigenstates in systems with a mixed phase space in terms of their projection onto individual regular tori. Depending on dynamical tunneling rates and the Heisenberg time, regular states disappear and chaotic states flood the regular tori. For a quantitative understanding we introduce a random matrix model. The resulting statistical properties of eigenstates as a function of an effective coupling strength are in very good agreement with numerical results for a kicked system. We discuss the implications of these results for the applicability of the semiclassical eigenfunction hypothesis.
Production and Development of LRCO‘s Silica Bricks
Institute of Scientific and Technical Information of China (English)
MAXianghong; LIZhenmin; 等
1998-01-01
This paper reviews the history of development and production of silica bricks at Luoyang Refrac-tories(Group) Co.,Ltd,(Former Luoyang Refrac-tories Factory). Through the improvement and in-troducing technology from abroad the company's management and quality standard on silica bricks production has reached a higher level.The physical and chemical specifications,as well as the appear-ance of silica bricks for coke ovens,hot blast stoves and glass kilns have reached the advanced interna-tional level.Now the company has become producing base and main exporting base various kinds of silica bricks in China.
The parameterization method for invariant manifolds from rigorous results to effective computations
Haro, Àlex; Figueras, Jordi-Lluis; Luque, Alejandro; Mondelo, Josep Maria
2016-01-01
This monograph presents some theoretical and computational aspects of the parameterization method for invariant manifolds, focusing on the following contexts: invariant manifolds associated with fixed points, invariant tori in quasi-periodically forced systems, invariant tori in Hamiltonian systems and normally hyperbolic invariant manifolds. This book provides algorithms of computation and some practical details of their implementation. The methodology is illustrated with 12 detailed examples, many of them well known in the literature of numerical computation in dynamical systems. A public version of the software used for some of the examples is available online. The book is aimed at mathematicians, scientists and engineers interested in the theory and applications of computational dynamical systems.
Orthogonal separable Hamiltonian systems on T2
Institute of Scientific and Technical Information of China (English)
无
2007-01-01
In this paper we characterize the Liouvillian integrable orthogonal separable Hamiltonian systems on T2 for a given metric, and prove that the Hamiltonian flow on any compact level hypersurface has zero topological entropy. Furthermore, by examples we show that the integrable Hamiltonian systems on T2 can have complicated dynamical phenomena. For instance they can have several families of invariant tori, each family is bounded by the homoclinic-loop-like cylinders and heteroclinic-loop-like cylinders. As we know, it is the first concrete example to present the families of invariant tori at the same time appearing in such a complicated way.
Lindstedt series, ultraviolet divergences and Moser's theorem
Bonetto, F; Gentile, G; Mastropietro, V
1995-01-01
Moser's invariant tori for a class of nonanalytic quasi integrable even hamiltonian systems are shown to be analytic in the perturbation parameter. We do so by exhibiting a summation rule for the divergent series (``Lindstedt series") that formally define them. We find additional cancellations taking place in the formal series, besides the ones already known and necessary in the analytic case (\\ie to prove convergence of Lindtsedt algorithm for Kolmogorov's invariant tori). The method is interpreted in terms of a non renormalizable quantum field theory, considerably more singular than the one we pointed out in the analytic case.
S3C: EBT Steady-State Shooting code description and user's guide
Energy Technology Data Exchange (ETDEWEB)
Downum, W.B.
1983-09-01
The Oak Ridge National Laboratory (ORNL) one-dimensional (1-D) Steady-State Shooting code (S3C) for ELMO Bumpy Torus (EBT) plasmas is described. Benchmark calculations finding the steady-state density and electron and ion temperature profiles for a known neutral density profile and known external energy sources are carried out. Good agreement is obtained with results from the ORNL Radially Resolved Time Dependent 1-D Transport code for an EBT-Q type reactor. The program logic is described, along with the physics models in each code block and the variable names used. Sample input and output files are listed, along with the main code.
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
The World Bank forecasts a rosy prospect for the Chinese economy,despite a moderate slowdown in growth.The real estate market continues to cool,with an increasing number of cities experiencing price declines.China’s state-owned enterprises face a bumpy road ahead,with their profits shrinking quickly.The shipping giant COSCO is swimming in red ink due to tepid demands and overcapacity.China is expected to replace the United States as the world’s top e-commerce market by 2015.
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
In an attempt to boost liquidity, China’s central bank decreases the reserve requirement ratio for the first time in three years. The November purchasing managers index tumbles below the boom-and-bust line of 50 percent, indicating downside growth risks. As they tighten delisting rules on the growth enterprise board, China’s securities regulator tries to protect interests of investors. The Ministry of Commerce has released a development outline for the service trade sector. Chinese shipbuilders face a bumpy road ahead due to weakness in demand. Credit card fever is sweeping through the country, though debt risks still loom large.
Institute of Scientific and Technical Information of China (English)
1997-01-01
I noticed a photo in the exhibition room of village history in North Yangjiawa,Liyuan Township, Tongxian County, Beijing. It was the epitome of the typical northern countryside:shabby houses, bumpy dirt roads and heaps of garbage. I didn’t feel strange about it, as I had once lived in such a village fur more than 1,000 days and nights during the Cultural Revolution when educated urban youths were encouraged tn work in the countryside and mountains. What astonished me was the words under this photo: North Yangjiawa in 1993. I couldn’t imagine how this tremendous change could happen in only three years.
Institute of Scientific and Technical Information of China (English)
无
2010-01-01
Export deals experience year-on-year increases at the Canton Fair,though uncertainties still linger.Soaring coal prices put cost pressures on thermal power generators.Fierce competition rocks the foundation of China Mobile’s market dominance.Chinese automaker BYD goes on a bumpy ride as its sales go through a free-fall.The Export-Import Bank of China ties up with the Inter-American Development Bank to finance trade between China and Latin America and the Caribbean region.
Mahler Measure, Eisenstein Series and Dimers
Stienstra, J.
2007-01-01
This note reveals a mysterious link between the partition function of certain dimer models on 2-dimensional tori and the L-function of their spectral curves. It also relates the partition function in certain families of dimer models to Eisenstein series. http://www.arxiv.org/abs/math.NT/0502197
Terrorism, Insurgency, and Afghanistan
2007-02-01
Afghanistan and Kashmir, through groups such as Lashkar e-Tayyiba (LT), Jaish-e-Mohammed (JEM), Jamiat Ulema- i-Islam’s Fazlur Rehman faction (JUI-F...British dubbed them “Mad Mullah movements.” There have been many. A similar figure to Mullah Omar, Mirza Ali Khan —a Tori KhelWaziri whowas known to
Tõmbed ja tõukumised / Aita Kivi
Kivi, Aita, 1954-
2001-01-01
Sisu : Margaret Atwood. Pime palgamõrvar; Sebastian Faulks. Charlotte Gray; Peter Carey. Oscar ja Lucinda; Kurt Vonnegut. Sinihabe; Aita Kivi. Jumalakäpp; Aita Kivi. Lummus; Raymond Radiguet. Saatan ihus; Wendu Northcutt. Darwini auhinnad; Merike Hanni. Ümberõpe; Merike Hanni. Tori hobune; Friedrich Schiller. Maria Stuart
BDML Datasets: 5 [SSBD[Archive
Lifescience Database Archive (English)
Full Text Available dt, J. and Stelzer, E.H.K. Philipp J. Keller, European Molecular Biology Laboratory, Cell Biology and Biophysics Unit, Stelzer Labora...tory See details in Keller et al. (2008) Science 322, 1065-1069. CC BY-NC-SA 1 x 1
Certification of MCNP Version 4A for WHC computer platforms. Revision 7
Energy Technology Data Exchange (ETDEWEB)
Carter, L.L.
1995-05-03
MCNP is a general-purpose Monte Carlo code that can be used for neutron, photon, or coupled neutron/photon transport, including the capability to calculate eigenvalues for critical systems. The code treats an arbitrary three-dimensional configuration of materials in geometric cells bounded by first- and second-degree surfaces, and some special fourth-degree surfaces (elliptical tori).
Lifescience Database Archive (English)
Full Text Available 633 151.1626 D00217.gif Analgesic; Antipyretic Same as: C06804 Therapeutic category: 1141 ATC code: N02BE01 Nonsteroidal antiinflamma...tory drugs (NSAIDs) Enzyme: CYP2E1 [HSA:1571], CYP2A6 [HSA:1548], CYP3A4 [HSA:1576
Institute of Scientific and Technical Information of China (English)
Ryan T Wagner; Austin J Cooney
2009-01-01
@@ Embryonic Stem Cells (ES cells) exhibit vast potential that is just begin-ning to be realized with regard to both clinical therapies, and use in the labora-tory as a model system for the study of development and cancer progression.
An Endochronic Plasticity Theory for Concrete.
1985-02-20
Strain Curves for Concrete Under Multiaxial Load His- tories," CEAE Department, Univ. of Colo., Boulder. 18. Stankowski, T., and K. H. Gerstle (1983...T. (1983), "Concrete Under Multiaxial Load Histories," M. S. Thesis, CEAE Department, University of Colorado, Boulder. 31. Valanis, K. C., and C. F
2007-11-02
in Czechow- ice-Dziedzice; the Swarzedz Furniture Factory; the Krosno Glass Factory (L. Balcerowicz visited that fac- tory at its "opening"); Tonsil ...permitted to perform construction work there. Recently long train loads of gravel and crushed stone were delivered at the base. One wonders what for
NCBI nr-aa BLAST: CBRC-OGAR-01-0612 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-152 88% ... ...CBRC-OGAR-01-0612 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CPOR-01-0920 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-139 79% ... ...CBRC-CPOR-01-0920 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-OGAR-01-0618 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 3e-77 64% ... ...CBRC-OGAR-01-0618 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-DNOV-01-2223 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-138 79% ... ...CBRC-DNOV-01-2223 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-HSAP-17-0013 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-170 95% ... ...CBRC-HSAP-17-0013 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-BTAU-01-1776 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-147 82% ... ...CBRC-BTAU-01-1776 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CPOR-01-0063 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-69 57% ... ...CBRC-CPOR-01-0063 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-EEUR-01-0490 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-147 83% ... ...CBRC-EEUR-01-0490 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CJAC-01-0087 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 8e-91 64% ... ...CBRC-CJAC-01-0087 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CJAC-01-1044 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-122 80% ... ...CBRC-CJAC-01-1044 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-PABE-18-0002 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-137 78% ... ...CBRC-PABE-18-0002 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-FCAT-01-0270 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-139 78% ... ...CBRC-FCAT-01-0270 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-BTAU-01-1761 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-149 84% ... ...CBRC-BTAU-01-1761 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-BTAU-01-1764 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-149 83% ... ...CBRC-BTAU-01-1764 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-BTAU-01-1765 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-150 84% ... ...CBRC-BTAU-01-1765 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-PABE-18-0015 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-126 95% ... ...CBRC-PABE-18-0015 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-HSAP-17-0002 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-126 76% ... ...CBRC-HSAP-17-0002 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CFAM-41-0069 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-150 85% ... ...CBRC-CFAM-41-0069 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-CJAC-01-1241 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-106 68% ... ...CBRC-CJAC-01-1241 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
NCBI nr-aa BLAST: CBRC-ETEL-01-0768 [SEVENS
Lifescience Database Archive (English)
Full Text Available tory receptor [Gorilla gorilla] gb|AAF03337.1| olfactory receptor [Gorilla gorilla] Q9TQX4 1e-156 88% ... ...CBRC-ETEL-01-0768 sp|Q9TQX4|OR1E2_GORGO Olfactory receptor 1E2 gb|AAF03336.1| olfac
Mateos, S; Alonso-Herrero, A; Hernán-Caballero, A; Barcons, X; Ramos, A Asensio; Watson, M G; Blain, A; Caccianiga, A; Ballo, L; Braito, V; Almeida, C Ramos
2016-01-01
We present the distributions of geometrical covering factors of active galactic nuclei (AGNs) dusty tori (f2) using an X-ray selected complete sample of 227 AGN drawn from the Bright Ultra-hard XMM-Newton Survey. The AGN have z from 0.05 to 1.7, 2-10 keV luminosities between 10^42 and 10^46 erg/s and Compton-thin X-ray absorption. Employing data from UKIDSS, 2MASS and the Wide-field Infrared Survey Explorer in a previous work we determined the rest-frame 1-20 microns continuum emission from the torus which we model here with the clumpy torus models of Nenkova et al. Optically classified type 1 and type 2 AGN are intrinsically different, with type 2 AGN having on average tori with higher f2 than type 1 AGN. Nevertheless, ~20 per cent of type 1 AGN have tori with large covering factors while ~23-28 per cent of type 2 AGN have tori with small covering factors. Low f2 are preferred at high AGN luminosities, as postulated by simple receding torus models, although for type 2 AGN the effect is certainly small. f2 in...
Institute of Scientific and Technical Information of China (English)
WANG Pei
2002-01-01
In this paper we study the spinor constructions of gauge fluxes and Ramond Ramond fields on noncommu-tative tori Td up to d＝6. In which the spinor and conjugate spinor are distinguished and dual bases are also introduced.So that we can express the Chern Simons Lagrangian in toroidal compactification as a product of spinors.
Institute of Scientific and Technical Information of China (English)
Chong Qing CHENG
2011-01-01
Given an integrable Hamiltonian ho with n-degrees of freedom and a Diophantine frequency w, then, arbitrarily close to ho in the Cr topology with r ＜ 2n, there exists an analytical Hamiltonian h∈ with no KAM torus of rotation vector w. In contrast with it, KAM tori exist if perturbations are small in Cr topology with r ＞ 2n.
Lifescience Database Archive (English)
Full Text Available TORY SYSTEM R06 ANTIHISTAMINES FOR SYSTEMIC USE R06A ANTIHISTAMINES FOR SYSTEMIC USE R06AX Other antihista...mines for systemic use R06AX01 Bamipine D07493 Bamipine lactate Target-based classi
DEFF Research Database (Denmark)
Borch, K.; Rasmussen, B.; Schleisner, L.
2000-01-01
Due to the complexity and advanced nature of modern biotechnology and to its content of risk and ethic matters it is necessary to face the challenge of making the prospect comprehensible and transparent to society. Using life cycle inven-tory (LCI),expert panels and weighted expert questionnaires...
Institute of Scientific and Technical Information of China (English)
无
2011-01-01
The Palace Museum inventories its collection For the first time in history, curators of the Palace Museum have finally inven- toried the museum’s vast collection. After seven years of painstaking work, the museum finally released the results of its first comprehensive inventory on January 26, showing that the museum houses 1,807,558 items.
Inventory Surged More Than 60% in the Nonferrous Metals Industry in the First Half of 2012
Institute of Scientific and Technical Information of China (English)
2012-01-01
<正>In the first half of this year,in the nonferrous metals industry listed companies’ inventory grew 63.46%. To some extent,changes in the inventory data of finished products mirror changes in the mutual dependence of suppliers and buyers,and changes in companies’ inven-tory often reflect future changes in industry prosperity.
Ophthalmic Care of the Combat Casualty
2003-01-01
tified. Oral and topical steroids, anticoagulant therapy, antineoplastic agents , echothiophate prod- ucts, and topical or systemic antibiotics tend to...continuing aspirin and nonsteroidal antiinflamma- tory oral agents is prudent because of their antiplatelet effects. Acetaminophen is preferred for pain... antiplatelet agents because these could cause further intraocular hem- orrhage and complications. Following the initial globe repair, complications (eg
Hartogs figure and symplectic non-squeezing
Sukhov, A
2011-01-01
We solve a problem on filling by Levi-flat hypersurfaces for a class of totally real 2-tori in a real 4-manifold with an almost complex structure tamed by an exact symplectic form. As an application we obtain a simple proof of Gromov's non-squeezing theorem in dimension 4 and new results on rigidity of symplectic structures.
Existence and measure of 2-quasiperiodicity in Hamiltonian one-and-a-half degree of freedom systems
Broer, HW; Van Noort, M; Simo, C; Dumortier, F; Broer, H; Mawhin, J; Vanderbauwhede, A; Lunel, SV
2005-01-01
The goal of this paper is to show some properties of real analytic Hamiltonian systems of the form H = 1/2y(2) + V(x, t), where V is periodic in x and t. We prove that this system has invariant tori of rotational type for sufficiently large values of vertical bar y vertical bar. The measure of the s
A Knowledge-Based Approach to Language Production
1985-08-01
borra un archivo? UC: Para borrar el archivo de nombre filename del espacio de trabajo , se escribe ’rm filename’. User: How do I delete all the...processing; however, a great deal of terri- tory remains to be explored in terms of stative verbs, locative relationships, and other related phenomena. The
Silk, Hugh
2014-03-01
Oral pathologic abnormality is common and can be potentially serious. There are many diseases of the mouth that medical personnel must be able to diagnose and initiate management. The most prevalent lesions can be categorized as infectious, inflammatory, and common benign and malignant lesions. This article discusses prevalence, cause, diagnosis, and management of lesions such as stomatitis, candidiasis, caries, oral cancers, and bony tori.
The Image of the Right Honourable Margaret Thatcher.
Auer, J. Jeffery
1979-01-01
Reviews the career of Prime Minister Thatcher and her participation in the campaign for her election. Identifies the five most salient elements in her image and within the general context of contemporary political communication in Britain: cultural identification, accent and word choice patterns, Tory message, sex, and sense of conviction. (JMF)
Topic: Single-sex Education in the UK
Institute of Scientific and Technical Information of China (English)
王其寓
2015-01-01
The Tory leadership contender Liam Fox claimed that boys should be taught in single-sex schools.(The Guardian,2005)According to his point,the new debate about the merits and drawbacks of single-sex education becoming increasingly intense in the United Kingdom.Boys and girls should be teaching
Willemsen, Annelieke E C A B; Grutters, JC; Gerritsen, Winald R; van Erp, Nielka P; van Herpen, Carla M L; Tol, Jolien
2016-01-01
Mammalian target of rapamycin inhibitors (mTORi) have clinically significant activity against various malignancies, such as renal cell carcinoma and breast cancer, but their use can be complicated by several toxicities. Interstitial lung disease (ILD) is an adverse event of particular importance. Mo
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Julia, B L
2001-01-01
Compactifications on tori may seem to have revealed their beauty long ago but the mystery of 11d Supergravity remains and fresh attempts at a conceptual breakthrough are worth the effort and quite timely. We shall concentrate here on the analogy with Instanton Mathematics and discuss some open questions and work in progress.
The Enlisted Steady State-Simulation (ESS-SIM) Tool
2014-07-01
1 Model design ...current inven- tories. A simulation of the transition from a current inventory toward the steady state is required for such an understanding. Model design ...described by paygrade (e.g., the Navy needs 100 E-5 OS personnel). • Longevity (length of service): Many personnel policies address longevity (e.g., Zone A
File list: His.Bld.50.AllAg.T-Lymphocytes,_Regulatory [Chip-atlas[Archive
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Improving flood risk communication by focusing on prevention-focused motivation
Boer, de J.; Botzen, W.J.W.; Terpstra, T.
2014-01-01
This paper proposes an approach to flood risk communication that gives particular emphasis to the distinction between prevention and promotion motivation. According to E. Tory Higgins (2012), the promotion system and the prevention system are assumed to coexist in every person, but one or the other
SwissProt search result: AK070179 [KOME
Lifescience Database Archive (English)
Full Text Available AK070179 J023044M21 (Q61189) Methylosome subunit pICln (Chloride conductance regula...tory protein ICln) (I(Cln)) (Chloride channel, nucleotide sensitive 1A) (Chloride ion current inducer protein) (ClCI) ICLN_MOUSE 9e-15 ...
SwissProt search result: AK121907 [KOME
Lifescience Database Archive (English)
Full Text Available AK121907 J033105N05 (Q61189) Methylosome subunit pICln (Chloride conductance regula...tory protein ICln) (I(Cln)) (Chloride channel, nucleotide sensitive 1A) (Chloride ion current inducer protein) (ClCI) ICLN_MOUSE 1e-12 ...
Topological effects on string vacua
Loaiza-Brito, Oscar
2011-01-01
We review some topological effects on the construction of string flux-vacua. Specifically we study the effects of brane-flux transitions on the stability of D-branes on a generalized tori compactificaction, the transition that a black hole suffers in a background threaded with fluxes and the connections among some Minkowsky vacua solutions.
Half Way to Hell: What Gove Is Doing to England's Schools
Gillard, Derek
2012-01-01
Following the indecisive general election in May 2010, the Tories and Liberal Democrats formed a coalition government with David Cameron as Prime Minister, George Osborne as Chancellor of the Exchequer, and Michael Gove as Secretary of State for Education. Right from the start, Gove was a man in a hurry. Within two weeks of his appointment he had…
Bates, Agnieszka
2015-01-01
The modernisation of education and other public services remains a major political objective of the current Coalition government in the UK. This paper focuses on "Tory Modernisation 2.0," a blueprint for the second stage of the public sector reform produced by the Conservative pressure group, Bright Blue. From the critical theory…
Perturbative analysis of maps of the circle onto itself
Energy Technology Data Exchange (ETDEWEB)
Zanetti, G. (Bologna Univ. (Italy). Ist. di Fisica); Turchetti, G. (Bologna Univ. (Italy). Ist. di Fisica; Istituto Nazionale di Fisica Nucleare, Bologna (Italy))
1984-09-15
As a model problem for the perturbation, up to break up, of tori in Hamoltonian mechanics, the map of the circle into itself is studied. By using classical perturbative techniques, not only the subcritical dynamics is well reproduced, but also the critical point is sharply defined and the conjugacy break up via the loss of differentiability is obtained in agreement with Shenker.
Experiment list: SRX143850 [Chip-atlas[Archive
Lifescience Database Archive (English)
Full Text Available || replicate=1 || softwareversion=ELAND || strain=C57BL/6 || strain description=C57 black 6, the most common inbred strain of labora...tory mouse http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/eachData/bw/SRX143850.bw
PAH Formation in O-rich Planetary Nebulae
Guzman-Ramirez, L; Jones, D; Zijlstra, A A; Gesicki, K
2014-01-01
Polycyclic aromatic hydrocarbons (PAHs) have been observed in O-rich planetary nebulae towards the Galactic Bulge. This combination of oxygen-rich and carbon-rich material, known as dual-dust or mixed chemistry, is not expected to be seen around such objects. We recently proposed that PAHs could be formed from the photodissociation of CO in dense tori. In this work, using VISIR/VLT, we spatially resolved the emission of the PAH bands and ionised emission from the [SIV] line, confirming the presence of dense central tori in all the observed O-rich objects. Furthermore, we show that for most of the objects, PAHs are located at the outer edge of these dense/compact tori, while the ionised material is mostly present in the inner parts of these tori, consistent with our hypothesis for the formation of PAHs in these systems. The presence of a dense torus has been strongly associated with the action of a central binary star and, as such, the rich chemistry seen in these regions may also be related to the formation o...
The Research Laboratory of Electronics Progress Report Number 133, January 1-December 1990
1990-12-31
form of a working Beam Epitaxy (MOMBE) of research facility in 1990. The substantial labora- ZnSe tory renovation was completed in February; the CBE...colleagues at Bernstein Waves in Toroidal Plasmas." Pro- the Italian laboratories of E.N.E.A. ( Energia ceedings of the International Sherwood Theory
Research Laboratory of Electronics Progress Report Number 133
1991-08-01
The substantial labora- ZnSe tory renovation was completed in February; the CBE system hardware was delivered in March and Sponsors installed...laboratories of E.N.E.A. ( Energia ceedings of the International Sherwood Theory Nucleare e Energie Alternative), as well as in- Meeting, Williamsburg, Virginia
DEGREE 3 ALGEBRAIC MINIMAL SURFACES IN THE 3-SPHERE
Institute of Scientific and Technical Information of China (English)
Joe S.Wang
2012-01-01
We give a local analytic characterization that a minimal surface in the 3-sphere S3 (C) R4 defined by an irreducible cubic polynomial is one of the Lawson's minimal tori.This provides an alternative proof of the result by Perdomo (Characterization of order 3 algebraic immersed minimal surfaces of S3,Geom.Dedicata 129 (2007),23-34).
SERDP Ecosystem Management Project (SEMP): 2005 Annual Report
2007-03-01
clarified. 7. Streams and landcover are both gross indicators that should be incorpo- rated into the model. TAC Recommendations: 1. Link an indicator...and endpoints and was created us- ing data from different sources including the 2001 landcover , forest inven- tory data from Fort Benning, and a
Documentation for the Computer Assisted Diagnostic Program for Dental Pain
1989-04-10
gingiva Irritation fibroma Epulis fissuratum Giant cell fibroma Peripheral ossifying fibroma Pulp polyp Traumatic neuroma Neurofibroma 6...black lesions Hematoma Pigmented nevi Pigmented irritation fibroma *Malignant melanoma Black hahy tongue *Peripheral giant cell granuloma (long...Macroglossia Buccal fat pads Tori 33. Sin;Jle finn non-herorrllagic nodules Irritation fibroma Epulis fissuratum Periphe:r:al ossifyin;J fibroma
Studies to Control Endemic Typhoid Fever in Chile
1985-09-01
Society for Microbiology, Chapter 16. 10. Medina E, Yrarrazaval M. (1983) Fiebre tifoidea en Chile: Consideraciones epideniologicas. Revista Medica de...R. (1975) Enteroparasitosis en manipuladores del’ arýa de salud oriente de Santiago. Boletin Chileno de Parasitologia 27: 115-116. 15. RiE.tori C
Relativistic phase space dimensional recurrences
Delbourgo, Robert
2003-01-01
We derive recurrence relations between phase space expressions in different dimensions by confining some of the coordinates to tori or spheres of radius $R$ and taking the limit as $R \\to \\infty$. These relations take the form of mass integrals, associated with extraneous momenta (relative to the lower dimension), and produce the result in the higher dimension.
mTOR inhibitor-associated stomatitis (mIAS) in three patients with cancer treated with everolimus.
Kalogirou, Eleni-Marina; Tosios, Konstantinos I; Piperi, Evangelia P; Sklavounou, Alexandra
2015-01-01
Mammalian targets of rapamycin inhibitors (mTOR inhibitors, mTORI) are indicated for the management of several cancer types, including hormone receptor--positive or HER2-negative breast cancer, advanced renal cell carcinoma, advanced neuroendocrine tumors of pancreatic origin, and tuberous sclerosis complex-related tumors. Among the most common adverse events of mTORI medication are discrete, large, solitary or multiple, superficial ulcers, almost exclusively situated on nonkeratinized oral mucosa, described as mTORI-associated stomatitis (mIAS). We describe the clinical presentation, course, and management of mIAS in three patients receiving the mTORI everolimus (Afinitor, Novartis, East Hanover, NJ). In two patients, mIAS manifested 9 and 30 days after first using everolimus, respectively, whereas in the third patient, it recurred 3 months after re-introduction of everolimus. Oral rinses with a "magic mouthwash" solution (dexamethasone oral drops solution 2 mg/mL × 10 mL, lidocaine gel 2% × 30 g, doxycycline suspension 50 mg/5 mL × 60 mL, and sucralfate oral suspension 1000 mg/5 mL × 150 mL, dissolved in sodium chloride 0.9% × 2000 mL) four times daily proved helpful in alleviating the symptoms, and the ulcers healed in 4 to 15 days. No side effects were recorded, and dose reduction or discontinuation of everolimus was not necessitated in two cases.
Flavor structure in S O (32 ) heterotic string theory
Abe, Hiroyuki; Kobayashi, Tatsuo; Otsuka, Hajime; Takano, Yasufumi; Tatsuishi, Takuya H.
2016-12-01
We study the flavor structure in S O (32 ) heterotic string theory on six-dimensional tori with magnetic fluxes. Specifically, we focus on models with the flavor symmetries S U (3 )f and Δ (27 ). In both models, we can realize the realistic quark masses and mixing angles.
An evaluation of known remaining oil resources in the United States: Appendix. Volume 10
Energy Technology Data Exchange (ETDEWEB)
NONE
1993-11-01
Volume ten contains the following appendices: overview of improved oil recovery methods which covers enhanced oil recovery methods and advanced secondary recovery methods; the benefits of improved oil recovery, selected data for the analyzed states; and list of TORIS fields and reservoirs.
Solar Magnetometry with the dutch open telescope
Rutten, R.J.; Hammerschlag, R.H.; Sütterlin, P.; Bettonvil, F.C.M.; Zalm, E.B.J. van der
2001-01-01
The Dutch Open Telescope (DOT) has become op- erational at the Roque de los Muchachos Observa- tory on La Palma. The rst image sequences taken with this innovative telescope demonstrate its capa- bility for tomographic high-resolution imaging of the magnetic topology of the solar atmosphere up to th
Toroidal Automorphic Forms for Function Fields
Lorscheid, O.
2008-01-01
The definition of a toroidal automorphic form is due to Don Zagier, who showed in a paper in 1979 that the vanishing of certain integrals of Eisenstein series over tori in GL(2) is related to the vanishing of the Riemann zeta function at the weight of the Eisenstein series; and thus a relation betwe
Capacity-Building Efforts by the AFHSC-GEIS Program
2011-01-01
with reference testing support by the CDC in Atlanta. This virology diagnos- tic-testing capacity building of national reference labora- tories... Veterinary Medicine & Medicine, Post Office Box 16524, Kampala, Uganda. 19Navy Environmental and Preventive Medicine Unit Number 2, 1887 Powhatan Street
Status Quo of Drug Supervision in China(Part Ⅱ)
Institute of Scientific and Technical Information of China (English)
无
2008-01-01
@@ Ⅲ. Policies and Measures Concerning Drug Safety SupervisionBased on its national conditions and learning from international advanced ex-perience, China has formulated policies and measures concerning the improve-merit of drug safety, effectiveness and quality control, and established a regula-tory system covering research, produc-tion, distribution and use of drugs.
2011-05-31
proved useful for testing the importance of putative gonococcal virulence factors for ure- thral infection in men. Studies with isogenic mutants have...dermatitis. Like other inflamma- tory mucosal infections, gonorrhea also facilitates HIV transmis- sion and acquisition. Treatment options for gonococcal...sensitive for experimental human infections with sexually transmitted pathogens . All of the studies described herein were subject to rigorous safety and
Directory of Open Access Journals (Sweden)
José M. Cancela
2009-11-01
Full Text Available The purpose of this study is to provide a tool, based on the knowledge of technical errors, which helps to improve the teaching and learning process of the Uki Goshi technique. With this aim, we set out to determine the most frequent errors made by 44 students when performing this technique and how these mistakes relate. In order to do so, an observational analysis was carried out using the OSJUDO-UKG instrument and the data were registered using Match Vision Studio (Castellano, Perea, Alday and Hernández, 2008. The results, analyzed through descriptive statistics, show that the absence of a correct initial unbalancing movement (45,5%, the lack of proper right-arm pull (56,8%, not blocking the faller's body (Uke against the thrower's hip -Tori- (54,5% and throwing the Uke through the Tori's side are the most usual mistakes (72,7%. Through the sequencial analysis of T-Patterns obtained with the THÈME program (Magnusson, 1996, 2000 we have concluded that not blocking the body with the Tori's hip provokes the Uke's throw through the Tori's side during the final phase of the technique (95,8%, and positioning the right arm on the dorsal region of the Uke's back during the Tsukuri entails the absence of a subsequent pull of the Uke's body (73,3%.
17 CFR 10.26 - Motions and other papers.
2010-04-01
... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Motions and other papers. 10... PRACTICE Institution of Adjudica- tory Proceedings; Pleadings; Motions § 10.26 Motions and other papers. (a...) the authority relied upon. If a motion is supported by briefs, affidavits or other papers, they...
1988-08-01
caper was "Nancy Hart’s dinner party". Five 0 Tories, who had just shot a neighbor, forced their way into her home, demanding a meal. Nancy Hart fed... Barbara and Umlauf, Hana. The Good Housekeeping Woman’s Almanan. New York: Newspaper Enterprise Association, Inc., 1977. Miller, Donald L. An Album of
Teaching Pre K-8, 2004
2004-01-01
This article describes an outdoor activity known as orienteering, the practice of using a map and a compass to find points in a landscape. Downloadable materials, courtesy of The Roger Tory Peterson Institute, can be found on www.TeachingK-8.com. These materials include instructions for the activity and reproducible illustrations of seven basic…
Seeing One's Place with New Eyes: The Role of Map-Making in Place-Based Education.
Birtzer, Carol E.
2000-01-01
Map making is an exercise in spatial relationships, perspective, and direction, and also can increase students' knowledge of their community and sense of place. In a Roger Tory Peterson Institute program, children map the environment around their school and simultaneously learn science, mathematics, language arts, and social studies. Describes…
Breaking the Barriers: Linking Children and Nature. Report of the Forum (October 1988).
Roger Tory Peterson Inst. of Natural History, Inc., Jamestown, NY.
The Roger Tory Peterson Institute is concerned with creating experiences in which children face the mysteries and wonders of the natural world and understand their connection with nature. The purpose of the forum was to support the growth of these experiences and the people who create them. The forum covered three broad topics: (1) visions for the…
A Real-Time Spoken-Language System for Interactive Problem Solving
1993-05-01
be that of the training data. The techniques developed by Rose removed with the RASTA filter. A simple RASTA filter and Paul (6) and Acero [7] used an...132. 13. S. Seneff. "A Joint Synchrony/Mean Rate Model of Audi- 7. A. Acero . "Acoustical and Envtronmental Robustness in tory Speech Processing,"our
Oro-mandibular manifestations of primary hyperparathyroidism
Directory of Open Access Journals (Sweden)
Sachin Rai
2012-01-01
Conclusion : Loss of lamina dura, ground glass appearance, and mandibular cortical width reduction are common findings in primary hyperparathyroidism and these are significantly correlated with elevated parathormone and alkaline phosphatase. However, the presence of brown tumors and oral tori are less commonly encountered features.
Lifescience Database Archive (English)
Full Text Available TORY SYSTEM R03 DRUGS FOR OBSTRUCTIVE AIRWAY DISEASES R03A ADRENERGICS, INHALANTS R03AC Selective beta-2-adr...JP16) R03C ADRENERGICS FOR SYSTEMIC USE R03CC Selective beta-2-adrenoreceptor agonists R03CC08 Procaterol D0
Normal Form for Families of Hamiltonian Systems
Institute of Scientific and Technical Information of China (English)
Zhi Guo WANG
2007-01-01
We consider perturbations of integrable Hamiltonian systems in the neighborhood of normally parabolic invariant tori. Using the techniques of KAM-theory we prove that there exists a canonical transformation that puts the Hamiltonian in normal form up to a remainder of weighted order 2d+1. And some dynamical consequences are obtained.
Chondromyxoid Fibroma of the Ethmoid Sinus
2011-06-01
related to symptoms caused by these lesions. When symptomatic, cases are associated with a long his- tory of chronic local pain (85%), swelling (65...were not appreciated Head and Neck Pathol 123 Author’s personal copy In the treatment of craniofacial CMF, most authors now recommend thorough
Baseline Tests of the Electra Van Model 1000 Electric Vehicle.
1980-07-01
Argonne National I- ahora tory 9700 South Liss Avenue Argonne, I i, 6043’) F. J. les 705 Buffalo D~rive Arlington, TX 76013 C. (irandy tUriion Flect nc CoI. P.O. Box 14’) St Louis. MO ( 3101 59
Informe preliminar sobre los estudios de la petrografia del extremo occidental de Galicia
Woensdregt, C.F.
1967-01-01
The extreme western part of Galicia around Cape Finisterre and Cape Toriñana, consists of pre-migmatic metamorphic rocks, partly migmatised, intruded by syn- and posttectonic granites. The pre-migmatic rocks are of sedimentary origin (biotite schists or gneisses) and of probable igneous origin (auge
2006-01-01
Laste- ja noortekooride suurkontserdist "Olen nii, nagu tahan" 26. mail Pärnu Kontserdimajas Pärnu rahvusvahelise koorifestivali raames, kontsertidest Sindi seltsimajas, Häädemeeste ja Pärnu-Jaagupi kirikus, Kilingi-Nõmme klubis, Tori rahvamajas ja Tõstamaa keskkoolis
Lifescience Database Archive (English)
Full Text Available [ Credits ] BLAST Search Image Search Home About Archive Update History Contact us ...od - Number of data entries 7 entries - Joomla SEF URLs by Artio About This Database Database Description Download License Update His...tory of This Database Site Policy | Contact Us Vector sequences - Budding yeast cDNA sequencing project | LSDB Archive ...
Kahu, Tõnis, 1962-
2005-01-01
Heliplaatidest: Tori Amos "The Beekeeper", 3 Doors Down "Seventeen Days", Jay-Z / Linkin Park "Collision Course", Patrick Moraz / Bill Bruford "Flags", Shuttle358 "Chessa", Erasure "Nightbird", Erinevad esitajad "Kingston 5 Presents The New Sound of Reggae", Ryuichi Sakamoto "Chasm", Ryuichi Sakamoto "Derrida"
Sepp, Krista
2012-01-01
Eesti Tõuloomakasvatuse Liidu poolt Ülenurme Põllumajandusmuuseumis 1. septembril korraldatud tõuloomade konkursil Tartu sügisnäitus. Tõuloom 2012 tunnustatud Eesti Hobusekasvatajate Seltsi liikmetest ning trakeeni, araabia tori, eesti ja eesti raskeveo tõugu hobustest
Willemsen, Annelieke E C A B; Grutters, Jan C; Gerritsen, Winald R; van Erp, Nielka P; van Herpen, Carla M L; Tol, Jolien
2016-05-15
Mammalian target of rapamycin inhibitors (mTORi) have clinically significant activity against various malignancies, such as renal cell carcinoma and breast cancer, but their use can be complicated by several toxicities. Interstitial lung disease (ILD) is an adverse event of particular importance. Mostly, mTORi-induced ILD remains asymptomatic or mildly symptomatic, but it can also lead to severe morbidity and even mortality. Therefore, careful diagnosis and management of ILD is warranted. The reported incidence of mTORi-induced ILD varies widely because of a lack of uniform diagnostic criteria and active surveillance. Because of the nonspecific clinical features, a broad differential diagnosis that includes (opportunistic) infections should be considered in case of suspicion of mTORi-induced ILD. The exact mechanism or interplay of mechanisms leading to the development of ILD remains to be defined. Suggested mechanisms are either a direct toxic effect or immune-mediated mechanisms, considering mTOR inhibitors have several effects on the immune system. The clinical course of ILD varies widely and is difficult to predict. Consequently, the discrimination between when mTOR inhibitors can be continued safely and when discontinuation is indicated is challenging. In this review, we give a comprehensive review of the incidence, clinical presentation and pathophysiology of mTORi-induced ILD in cancer patients. We present newly developed diagnostic criteria for ILD, which include clinical symptoms as well as basic pulmonary function tests and radiological abnormalities. In conjunction with these diagnostic criteria, we provide a detailed and easily applicable clinical management algorithm.
Morphology and identification of fly eggs: application in forensic entomology.
Sanit, S; Sribanditmongkol, P; Sukontason, K L; Moophayak, K; Klong-Klaew, T; Yasanga, T; Sukontason, K
2013-06-01
Fly eggs found in corpses can be used as entomological evidence in forensic investigation. This study aims to investigate the morphology of forensically important fly eggs. Eggs of Chrysomya rufifacies, Chrysomya megacephala, Chrysomya pinguis, Chrysomya nigripes, Hypopygiopsis tumrasvini, Lucilia cuprina, Lucilia porphyrina and Musca domestica were examined using 1% potassium permanganate solution for 1 min. Morphometric analysis revealed that the mean length of Hy. tumrasvini (1.63 mm) and C. pinguis (1.65 mm) eggs was the longest, followed by that of L. porphyrina (1.45 mm), C. rufifacies (1.34 mm). The egg length, width of median area and darkness staining of hatching pleats were distinctive features. Four categories of median area were proposed, based on width; (1) distinctly wide (Megaselia scalaris, Synthesiomyia nudiseta); (2) wide (C. nigripes, M. domestica); (3) slightly widening (Hy. tumrasvini, L. cuprina, L. porphyrina); and (4) narrow (C. rufifacies, C. albiceps, C. megacephala, C. pinguis). Four species were examined using SEM, i.e., C. megacephala, C. pinguis, Hy. tumrasvini and L. porphyrina. The eggs of C. megacephala demonstrated swollen hatching pleats. Inside, the hexagon of the chorion appeared as a sponging bumpy feature. The egg of C. pinguis was similar to C. megacephala, except for the sponging bumpy feature on the outer surface of the hatching pleats. Regarding Hy. tumrasvini and L. porphyrina, their island structure was apparent at the inner surface of the upright hatching pleats. The key for identifying these eggs together with other reported species in Thailand has been updated.
A study on the Detection of Misfire in Gasoline Engine via Walsh Transform
Energy Technology Data Exchange (ETDEWEB)
Lee, Tae Pyo [Hyundai Motor Company (Korea); Kim, Jong Boo [Induk Institute of Technology (Korea); Ahn, Doo Soo [Sungkyunkwan University (Korea)
2000-06-01
The primary cause of air pollution by vehicles is imperfect combustion of fuel. One of the most usual causes of this imperfect combustion is the misfire in IC(Internal Combustion) engine. Recently it is obligated for an ECU to monitor the emission level and warn the driver in case of exceeding specified emission standards. Therefore, in order to comply with this OBD-II regulations, car makers are investing a considerable amount into technology which would enable the detection of misfire and the particular cylinder in which misfire is taking place. So far, it has been able to detect misfire using engine speed, which can be obtained crank angle. However, such a method posed a problem in analyzing at high speed and in recognizing the misfire from the load impact at bumpy road. In this paper, misfire detection is made possible by simple arithmetic using WDFT, especially at high engine speed. In addition, the moving window method of a Walsh function is applied to determine the cylinders under misfire in case of multiple misfires. An actual experiment was conducted to prove that WDFT is applicable to effective in computation speed and to same result in misfire detection and cylinder determination at idle, part load and bumpy road conditions. (author). 13 refs., 11 figs., 4 tabs.
Optimization of confinement in a toroidal plasma subject to strong radial electric fields
Roth, J. R.
1977-01-01
The toroidal ring of plasma contained in the NASA Lewis Bumpy Torus facility may be biased to positive or negative potentials approaching 50 kV by applying dc voltages of the respective polarity to 12 or fewer midplane electrode rings. The radial electric fields, which are responsible for raising the ions to high energies by E x B/B-squared drift, then point out of or into the plasma. A preliminary report is given on the identification and optimization of independent variables which affect the ion density and confinement time in the Bumpy Torus plasma. The independent variables include the polarity, position, and number of the midplane electrode rings, the method of gas injection, and the polarity and strength of a weak vertical magnetic field. Some characteristic data taken under conditions where most of the independent variables were optimized are presented. The highest value of the electron number density on the plasma axis is 3.2 trillion per cu cm, the highest ion heating efficiency is 47%, and the longest particle containment time is 2.0 msec.
The NASA-Lewis program on fusion energy for space power and propulsion, 1958-1978
Schulze, Norman R.; Roth, J. Reece
1990-01-01
An historical synopsis is provided of the NASA-Lewis research program on fusion energy for space power and propulsion systems. It was initiated to explore the potential applications of fusion energy to space power and propulsion systems. Some fusion related accomplishments and program areas covered include: basic research on the Electric Field Bumpy Torus (EFBT) magnetoelectric fusion containment concept, including identification of its radial transport mechanism and confinement time scaling; operation of the Pilot Rig mirror machine, the first superconducting magnet facility to be used in plasma physics or fusion research; operation of the Superconducting Bumpy Torus magnet facility, first used to generate a toroidal magnetic field; steady state production of neutrons from DD reactions; studies of the direct conversion of plasma enthalpy to thrust by a direct fusion rocket via propellant addition and magnetic nozzles; power and propulsion system studies, including D(3)He power balance, neutron shielding, and refrigeration requirements; and development of large volume, high field superconducting and cryogenic magnet technology.
Practical application of KAM theory to galactic dynamics: I. Motivation and methodology
Weinberg, Martin D
2015-01-01
Our understanding of the mechanisms governing the structure and secular evolution galaxies assume nearly integrable Hamiltonians with regular orbits; our perturbation theories are founded on the averaging theorem for isolated resonances. On the other hand, it is well-known that dynamical systems with many degrees of freedom are irregular in all but special cases. The best developed framework for studying the breakdown of regularity and the onset is the Kolmogorov-Arnold-Moser (KAM) theory. Here, we use a numerical version of the KAM procedure to construct regular orbits (tori) and locate irregular orbits (broken tori). Irregular orbits are most often classified in astronomical dynamics by their exponential divergence using Lyapunov exponents. Although their computation is numerically challenging, the procedure is straightforward and they are often used to estimate the measure of regularity. The numerical KAM approach has several advantages: 1) it provides the morphology of perturbed orbits; 2) its constructiv...
Viewing the circumnuclear medium "through" the radio absorption
Morganti, R
2001-01-01
Observations of radio absorption (free-free and 21 cm neutral hydrogen absorption) can provide important constraints on the interstellar medium (either ionised or neutral) surrounding AGN. This gas is relevant in the obscuration of the central regions and, therefore, in producing the orientation-dependent aspects of the emission from the AGN itself, one of the key elements of the unified schemes. From these observations we can learn: how strong is the evidence for circumnuclear tori/disks and how often, instead, is the interaction between the radio plasma and large-scale ISM playing a role; are the tori/disks (when observed) thick or thin and how important is this gas in affecting the characteristics of radio sources, especially in their early phase. Here, I will summarise the recent results obtained from free-free and HI absorption observations of Seyfert and radio galaxies, what they can tell us about these issues, and which questions remain open.
Magnetized Hypermassive Neutron Star Collapse: a candidate central engine for short-hard GRBs
Stephens, Branson C; Liu, Yuk Tung; Shapiro, Stuart L; Shibta, Masaru
2016-01-01
Hypermassive neutron stars (HMNSs) are equilibrium configurations supported against collapse by rapid differential rotation and likely form as transient remnants of binary neutron star mergers. Though HMNSs are dynamically stable, secular effects such as viscosity or magnetic fields tend to bring HMNSs into uniform rotation and thus lead to collapse. We simulate the evolution of magnetized HMNSs in axisymmetry using codes which solve the Einstein-Maxwell-MHD system of equations. We find that magnetic braking and the magnetorotational instability (MRI) both contribute to the eventual collapse of HMNSs to rotating black holes surrounded by massive, hot accretion tori and collimated magnetic fields. Such hot tori radiate strongly in neutrinos, and the resulting neutrino-antineutrino annihilation could power short-hard GRBs.
Dynamical bifurcation in a system of coupled oscillators with slowly varying parameters
Directory of Open Access Journals (Sweden)
Igor Parasyuk
2016-08-01
Full Text Available This paper deals with a fast-slow system representing n nonlinearly coupled oscillators with slowly varying parameters. We find conditions which guarantee that all omega-limit sets near the slow surface of the system are equilibria and invariant tori of all dimensions not exceeding n, the tori of dimensions less then n being hyperbolic. We show that a typical trajectory demonstrates the following transient process: while its slow component is far from the stationary points of the slow vector field, the fast component exhibits damping oscillations; afterwards, the former component enters and stays in a small neighborhood of some stationary point, and the oscillation amplitude of the latter begins to increase; eventually the trajectory is attracted by an n-dimesional invariant torus and a multi-frequency oscillatory regime is established.
AGN polarization modeling with STOKES
Goosmann, R W; Shoji, M; Goosmann, Rene W.
2007-01-01
We introduce a new, publicly available Monte Carlo radiative transfer code, STOKES, which has been developed to model polarization induced by scattering off free electrons and dust grains. It can be used in a wide range of astrophysical applications. Here, we apply it to model the polarization produced by the equatorial obscuring and scattering tori assumed to exist in active galactic nuclei (AGNs). We present optical/UV modeling of dusty tori with a curved inner shape and for two different dust types: one composition reproduces extinction properties of our Galaxy, and the other is derived from composite quasar spectra. The polarization spectra enable us to clearly distinguish between the two dust compositions. The STOKES code and its documentation can be freely downloaded from http://www.stokes-program.info/.
Zanotti, O; Font, J A
2003-01-01
We present general relativistic hydrodynamics simulations of constant specific angular momentum tori orbiting a Schwarzschild black hole. These tori are expected to form as a result of stellar gravitational collapse, binary neutron star merger or disruption, can reach very high rest-mass densities and behave effectively as neutron stars but with a toroidal topology (i.e. ``toroidal neutron stars''). Our attention is here focussed on the dynamical response of these objects to axisymmetric perturbations. We show that, upon the introduction of perturbations, these systems either become unstable to the runaway instability or exhibit a regular oscillatory behaviour resulting in a quasi-periodic variation of the accretion rate as well as of the mass quadrupole. The latter, in particular, is responsible for the emission of intense gravitational radiation whose signal-to-noise ratio at the detector is comparable or larger than the typical one expected in stellar-core collapse, making these new sources of gravitationa...
General Relativistic Simulations of Binary Neutron Star Mergers
Giacomazzo, Bruno; Rezzolla, Luciano; Baiotti, Luca; Link, David; Font, José A.
2011-08-01
Binary neutron star mergers are one of the possible candidates for the central engine of short gamma-ray bursts (GRBs) and they are also powerful sources of gravitational waves. We have used our fully general relativistic hydrodynamical code Whisky to investigate the merger of binary neutron star systems and we have in particular studied the properties of the tori that can be formed by these systems, their possible connection with the engine of short GRBs and the gravitational wave signals that detectors such as advanced LIGO will be able to detect. We have also shown how the mass of the torus varies as a function of the total mass of the neutron stars composing the binary and of their mass ratio and we have found that tori sufficiently massive to power short GRBs can indeed be formed.
THEORETICAL BASES OF DANCE/MOVEMENT THERAPY
Садыкова, Д. А.
2015-01-01
The article is devoted to dance/movement therapy — a special kind of psychotherapy that uses a dance movement for the development of social, emotional and physical life of the individual. This is a form of psychosomatic treatment aimed at identifying links between mental conflicts and somatic symptoms, on exemption from physical and mental stress. The article examines the theoretical foundations of dance therapy, his¬tory of its formation, basic directions and forms of work.
The President’s Authority to Promulgate Death Penalty Standards
1989-04-01
legislative delegation, it is important to recognize that Congress, in enacting the UCMJ, was not writing on a tabula rasa . Historically, * 18 much latitude...historical role the President has always played in this area. "Standards prescribed by Congress are to be read in the light of the conditions to which...limited role of the courts in reviewing a statu- tory death penalty scheme. It is worth quoting at length to catch the full flavor of the Court’s
Energy Technology Data Exchange (ETDEWEB)
Emelianova, Yu.P., E-mail: yuliaem@gmail.com [Department of Electronics and Instrumentation, Saratov State Technical University, Polytechnicheskaya 77, Saratov 410054 (Russian Federation); Kuznetsov, A.P., E-mail: apkuz@rambler.ru [Kotel' nikov' s Institute of Radio-Engineering and Electronics of RAS, Saratov Branch, Zelyenaya 38, Saratov 410019 (Russian Federation); Turukina, L.V., E-mail: lvtur@rambler.ru [Kotel' nikov' s Institute of Radio-Engineering and Electronics of RAS, Saratov Branch, Zelyenaya 38, Saratov 410019 (Russian Federation); Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam (Germany)
2014-01-10
The dynamics of the four dissipatively coupled van der Pol oscillators is considered. Lyapunov chart is presented in the parameter plane. Its arrangement is discussed. We discuss the bifurcations of tori in the system at large frequency detuning of the oscillators. Here are quasi-periodic saddle-node, Hopf and Neimark–Sacker bifurcations. The effect of increase of the threshold for the “amplitude death” regime and the possibilities of complete and partial broadband synchronization are revealed.
About Landau–Hopf scenario in a system of coupled self-oscillators
Energy Technology Data Exchange (ETDEWEB)
Kuznetsov, Alexander P.; Kuznetsov, Sergey P.; Sataev, Igor R.; Turukina, Ludmila V., E-mail: lvtur@rambler.ru
2013-12-17
The conditions are discussed for which an ensemble of interacting oscillators may demonstrate the Landau–Hopf scenario of successive birth of multi-frequency quasi-periodic motions. A model is proposed that is a network of five globally coupled oscillators characterized by controlled degree of activation of individual oscillators. Illustrations are given for successive birth of tori of increasing dimension via quasi-periodic Hopf bifurcations.
Spherical tokamak development in Brazil
Energy Technology Data Exchange (ETDEWEB)
Ludwig, G.O.; Del Bosco, E.; Ferreira, J.G.; Berni, L.A.; Oliveira, R.M.; Andrade, M.C.R.; Shibata, C.S.; Ueda, M.; Barroso, J.J.; Castro, P.J. [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Lab. Associado de Plasma; Barbosa, L.F.W. [Universidade do Vale do Paraiba (UNIVAP), Sao Jose dos Campos, SP (Brazil). Faculdade de Engenharia, Arquitetura e Urbanismo; Patire Junior, H. [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Div. de Mecanica Espacial e Controle; The high-power microwave sources group
2003-12-01
This paper describes the general characteristics of spherical tokamaks, or spherical tori, with a brief overview of work in this area already performed or in progress at several institutions worldwide. The paper presents also the steps in the development of the ETE (Experimento Tokamak Esferico) project, its research program, technical characteristics and operating conditions as of December, 2002 at the Associated Plasma Laboratory (LAP) of the National Space Research Institute (INPE) in Brazil. (author)
Spherical tokamak development in Brazil
Energy Technology Data Exchange (ETDEWEB)
Ludwig, Gerson Otto; Bosco, Edson Del; Ferreira, Julio Guimaraes [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Lab. Associado de Plasma] (and others)
2003-07-01
The general characteristics of spherical tokamaks, or spherical tori, with a brief view of work in this area already performed or in progress at several institutions worldwide are described. The paper presents also the steps in the development of the ETE (Experiment Tokamak spheric) project, its research program, technical characteristics and operating conditions as of December, 2002 a the Associated Plasma Laboratory (LAP) of the National Space Research Institute (INPE) in Brazil. (author)
Dynamics of capture in the restricted three-body problem
Astakhov, S A; Farrelly, S W D; Burbanks, Andrew D.; Farrelly, Stephen Wiggins & David
2003-01-01
We propose a new dynamical model for capture of irregular moons which identifies chaos as the essential feature responsible for initial temporary gravitational trapping within a planet's Hill sphere. The key point is that incoming potential satellites get trapped in chaotic orbits close to "sticky" KAM tori in the neighbourhood of the planet, possibly for very long times, so that the chaotic layer largely dictates the final orbital properties of captured moons.
Wartime Burn Care in Iraq: 28th Combat Support Hospital, 2003
2007-11-01
35 Furthermore, provider exhaustion (" burnout ") is a real problem among bum care professionals working in U.S. bum centers.36-40 In our experience...the burnout problem may be magnified in the deployed setting. A paucity of studies ad- dress burnout among deployed military health care providers...tory distress syndrome . A special metal platform was used for securing portable med- ical equipment to the NATO litter and was invaluable at the
Notes on noncommutative algebraic topology
Nikolaev, Igor
2010-01-01
An operator (AF-) algebra A_f is assigned to each Anosov diffeomorphism f of a manifold M. The assignment is a functor on the category of (mapping tori of) all such diffeomorphisms, which sends continuous maps between the manifolds to the stable homomorphisms of the corresponding AF-algebras. We use the functor to prove non-existence of continuous maps between the hyperbolic torus bundles, an obstruction being the so-called Galois group of algebra A_f.
Rehabilitation of Navigation Lock Walls: Case Histories
1987-12-01
the low bidder, Pre mier Waterproofing Company, Denver, Colorado. 258. There was no device or test which co uld be used to measure the degree of...concrete to be in sound condition except for surface deterioration. Total resurfacing of the lock chamber would be for cosmetic reasons only and was not...replacement of deteriorated concrete may only be cosmetic and in many cases the appearance may not be satisfac- tory either. Damage from freezing and
1987-12-01
construction contract for the repairs was awarded to the low bidder, Premier Waterproofing Company, .- Denver, Colorado. 258. There was no device or test...sound condition except for surface deterioration. Total resurfacing of the lock chamber would be for cosmetic reasons only and was not considered...may only be cosmetic and in many cases the appearance may not be satisfac- . ’ tory either. Damage from freezing and thawing may only be a % few
Elust pealinna ristteel = Zhizn na perekrestke stolitsõ / Veronika Nuter
Nuter, Veronika
2007-01-01
1980-ndate lõpul alanud ja 17 aastat kestnud Osten Tori ehituslugu. 2000. a. algatatakse detailplaneering kinnistule Pärnu mnt. 110 ja 110a, koostaja AB Künnapu & Padrik. Uue korterelamu arhitektuurse lahenduse saamiseks korraldatakse kolme Soome arhitektuuribüroo vahel konkurss, mille võidab Mustanen-Salminen-Vaarna OY ideekavand. Hoone projekti edasiarendamist jätkab Eesti büroo KPME OÜ. 2006. a. valminud hoone plussid ja miinused
Sigma-Model Solitons on Noncommutative Spaces
Dabrowski, Ludwik; Landi, Giovanni; Luef, Franz
2015-12-01
We use results from time-frequency analysis and Gabor analysis to construct new classes of sigma-model solitons over the Moyal plane and over noncommutative tori, taken as source spaces, with a target space made of two points. A natural action functional leads to self-duality equations for projections in the source algebra. Solutions, having nontrivial topological content, are constructed via suitable Morita duality bimodules.
Institute of Scientific and Technical Information of China (English)
ZHANG ZHIPING
2010-01-01
@@ After a 200-hour ordeal, 115 survivors were successfully rescued from the flooded Wangjialing Coal Mine. This is a miracle in the his-tory of Chinese mining rescues. Eight days ago, surging underground water trapped 153 workers in the mine. As in many other Chinese coal mines, workers in the Wangjialing Coal Mine come from China's poorer areas, and income from the mine is usually the main source of income for the families of these workers.
2006-12-01
threshold were the same as that obtained when each tory sensitivity are augmented by presbycusis . Unlike WEN ear was considered independently. Differences...the ability of ( presbycusis ) and sex differences in the onset of hearing im- marine mammals to survive and exploit their environment. pairment have...behavioral approaches to audiometry require subjects causes of hearing loss are primarily attributed to noise expo- sure (33.7%), presbycusis (28%), and
Morita Duality and Noncommutative Wilson Loops in Two Dimensions
Cirafici, M; Seminara, D; Szabó, R J; Cirafici, Michele; Griguolo, Luca; Seminara, Domenico; Szabo, Richard J.
2005-01-01
We describe a combinatorial approach to the analysis of the shape and orientation dependence of Wilson loop observables on two-dimensional noncommutative tori. Morita equivalence is used to map the computation of loop correlators onto the combinatorics of non-planar graphs. Several nonperturbative examples of symmetry breaking under area-preserving diffeomorphisms are thereby presented. Analytic expressions for correlators of Wilson loops with infinite winding number are also derived and shown to agree with results from ordinary Yang-Mills theory.
Transition to two-dimensionality in magnetohydrodynamic turbulent Taylor-Couette flow.
Zhao, Yurong; Tao, Jianjun; Zikanov, Oleg
2014-03-01
Transition from a Taylor-Couette turbulent flow to a completely two-dimensional axisymmetric turbulent state is realized numerically by increasing gradually the strength of the azimuthal magnetic field produced by electric current flowing through the axial rod. With the increase of the Hartmann number, the Taylor-vortex-like structures shrink, move closer to the inner cylinder, and turn into unsteady but perfect tori at sufficiently high Hartmann numbers.
CP^n, or, entanglement illustrated
Bengtsson, I; Zyczkowski, K
2002-01-01
We show that many topological and geometrical properties of complex projective space can be understood just by looking at a suitably constructed picture. The idea is to view CP^n as a set of flat tori parametrized by the positive octant of a round sphere. We pay particular attention to submanifolds of constant entanglement in CP^3 and give a few new results concerning them.
Experiment list: SRX534886 [Chip-atlas[Archive
Lifescience Database Archive (English)
Full Text Available 16 strain=HCT116 || age=N/A || biomaterial_provider=Gene Regulation Section; Labora...tory of Pathology; NCI; NIH || sex=not determined || tissue=colon || cell_line=HCT116...e Diagnosis=Carcinoma 34225829,61.3,34.0,18330 Genome wide localization of RNA Polymerase II (PolII) in human colon cancer cells HCT1
NMS Flows on Three-Dimensional Manifolds with One Saddle Periodic Orbit
Institute of Scientific and Technical Information of China (English)
B. CAMPOS; A. CORDERO; J. Mart(i)nez ALFARO; P. VINDEL
2004-01-01
The simplest NMS flow is a polar flow formed by an attractive periodic orbit and a repulsive periodic orbit as limit sets. In this paper we show that the only orientable, simple, compact,3-dimensional manifolds without boundary that admit an NMS flow with none or one saddle periodic orbit are lens spaces.We also see that when a fattened round handle is a connected sum of tori, the corresponding flow is also a trivial connected sum of flows.
TEKİN, SEHER
2008-01-01
Science laboratory activities have got an important position in science teaching. The main purpose of laboratory experiments in the science teachers train- ing program is to acquire some laboratory knowledge and skills for the prospective teachers. But it is known that science students don’t benefit from laboratory always adequately. Increasing the efficiency of laboratory activities is tried different labora- tory strategies that one of them is prediction-observation-explanation (POE) strate...
A New Era for Command and Control of Aerospace Operations
2014-08-01
luxury of not being contested in the air and space domains. Those days are rapidly changing. According to the Department of Defense’s report on...the fac- tory for generating the air tasking order—the administrative vehicle for translating the combatant commander’s air strategy into executable...exploit their “nontraditional” capabilities in a fashion that becomes the new “traditional.” Doing so will demand leading-edge networking capabilities and
Morphine, Endogenous Opioid Peptides, and Reproduction in the Male Rhesus Monkey
1983-05-18
been found for morphine, but does exist for other narco- tics such as methadone (Jakubovic et_ aU_, 1979; Purohit £l £lj_, 1978). These inhibitory...three hovirs after adininstratlon. In this study, aminoglutethamlde, a known inhibitor of steroid synthesis , was administered as a positive control...tory depression. Mean plasma testosterone levels in methadone -treated men showed no direct methadone dose-testosterone level relationship (Cushman
Theory, Implementation, and the Future of Airpower
2014-10-01
conflict in his great History of the Peloponnesian War, noting that “fear . . . honor and interest” will al- ways motivate humans to fight. At the same...taught history at the US Air Force Academy, ultimately serving as the academy’s director of military his- tory, and was part of the initial cadre of...chapters. Dr. Clodfelter is an avid fan of Air Force football, North Carolina basketball, and St. Louis Cardinals baseball . Let us know what you think
Noncommutative Geometry in M-Theory and Conformal Field Theory
Energy Technology Data Exchange (ETDEWEB)
Morariu, Bogdan [Univ. of California, Berkeley, CA (United States)
1999-05-01
In the first part of the thesis I will investigate in the Matrix theory framework, the subgroup of dualities of the Discrete Light Cone Quantization of M-theory compactified on tori, which corresponds to T-duality in the auxiliary Type II string theory. After a review of matrix theory compactification leading to noncommutative supersymmetric Yang-Mills gauge theory, I will present solutions for the fundamental and adjoint sections on a two-dimensional twisted quantum torus and generalize to three-dimensional twisted quantum tori. After showing how M-theory T-duality is realized in supersymmetric Yang-Mills gauge theories on dual noncommutative tori I will relate this to the mathematical concept of Morita equivalence of C*-algebras. As a further generalization, I consider arbitrary Ramond-Ramond backgrounds. I will also discuss the spectrum of the toroidally compactified Matrix theory corresponding to quantized electric fluxes on two and three tori. In the second part of the thesis I will present an application to conformal field theory involving quantum groups, another important example of a noncommutative space. First, I will give an introduction to Poisson-Lie groups and arrive at quantum groups using the Feynman path integral. I will quantize the symplectic leaves of the Poisson-Lie group SU(2)*. In this way we obtain the unitary representations of U_{q}(SU(2)). I discuss the X-structure of SU(2)* and give a detailed description of its leaves using various parametrizations. Then, I will introduce a new reality structure on the Heisenberg double of Fun_{q} (SL(N,C)) for q phase, which can be interpreted as the quantum phase space of a particle on the q-deformed mass-hyperboloid. I also present evidence that the above real form describes zero modes of certain non-compact WZNW-models.
2016-08-19
injuries based on Medical Dictionary for Regulatory Activities (MedDRA) preferred terms from all adverse event (AE) listings. Patients receiving...study results of clobazam in Lennox-Gastaut syndrome. Neurology 2011;77:1473–1481. 5. Medical Dictionary for Regulatory Activities. Available at: http...Ryvlin P, Cucherat M, Rheims S. Risk of sudden unexpected death in epilepsy in patients given adjunctive antiepileptic treatment for refrac- tory
A simple spatiotemporal chaotic Lotka-Volterra model
Energy Technology Data Exchange (ETDEWEB)
Sprott, J.C. [Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, WI 53706 (United States)] e-mail: sprott@physics.wisc.edu; Wildenberg, J.C. [Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, WI 53706 (United States)] e-mail: jcwildenberg@wisc.edu; Azizi, Yousef [Institute for Advanced Studies in Basic Sciences, Zanjan (Iran, Islamic Republic of)] e-mail: joseph_azizi@yahoo.com
2005-11-01
A mathematically simple example of a high-dimensional (many-species) Lotka-Volterra model that exhibits spatiotemporal chaos in one spatial dimension is described. The model consists of a closed ring of identical agents, each competing for fixed finite resources with two of its four nearest neighbors. The model is prototypical of more complicated models in its quasiperiodic route to chaos (including attracting 3-tori), bifurcations, spontaneous symmetry breaking, and spatial pattern formation.
Rigidity Theorem of Hypersurfaces with Constant Scalar Curvature in a Unit Sphere
Institute of Scientific and Technical Information of China (English)
Guo Xin WEI
2007-01-01
In this paper,we give a characterization of tori S1(√nr-2-n/nr)×Sn-1 (√n-2/nr)and Sm(√m/n)×Sn-m(√n-m/n).Our result extends the result due to Li (1996)on the condition that Mis an n-dimensional complete hypersurface in Sn+1 with two distinct principal curvatures.
Counterinsurgency in Brazil: Lessons of the Fighting from 1968 to 1974
2010-04-12
Vestfgios do Passado. Ampuh, RS: Associacao Nacional de Historia , 2008. http://www.eeh2008.anpuh- rs. org. br/resources/content/anais/121 0691256...Irregular: Terrorismo, Guerrilha e Movimentos de Resistencia ao Zanga da Historia (Irregular Waifare: Terrorism, Guerrilla Warfare and Resistance...na Operac;ao Condor (Brazil in Condor Operation). A venturas na His tori a," Abril online, http:/ / historia . abril.com. br/politicalbrasil-operacao
Status of Research in Underwater Physiology
1956-03-01
9 2.3.1 Individual Differences in Susceptibility to Nitrogen Narcosis ...................... 9 2.3.2 Central Nervous System Effects...oxygen toxicity and nitrogen narcosis at higher pressures should be investigated. This report describing problems not yet solved in the broad field of...even convulsions, but also to the pharmacology of oxygeu toxicity and nitrogen narcosis , the physiology of respira- tory resistance and exercise, and
Institute of Scientific and Technical Information of China (English)
卫赤
2012-01-01
在刚刚过去的2013春夏纽约时装周里，Ralph Lauren、Marc Jacobs、DVF、Kate Spade、Tory Burch、Calvin Klein、DKNY等品牌的设计师们，为春夏时尚创造了不少“趋势”，让我们先睹为快吧!
Ayse Balkarli; Veli Cobankara
2016-01-01
Rheumatoid arthritis (RA) is a multisystem inflammatory disease characterized by destructive synovitis and systemic extra-articular involvement. Leflunomide is a disease-modifying anti-rheumatic drug with anti-inflammatory and anti-proliferative features. Leflunomide is an isoxazole immunomodulatory agent, which inhibits dihydroorotate dehydrogenase enzyme involved in de novo pyrimidine synthesis. It was shown that leflunomide can reduce signs and symptoms of rheumatoid arthritis (RA) with ...
Institute of Scientific and Technical Information of China (English)
CHRIS; DEVONSHIRE-ELLIS
2008-01-01
Inventory control is one of the most important business processes during the operation of a trading or manufacturing company as it relates to purchases,sales and logistic activities,In order to have clear inven- tory management,a company should focus not only on logistic management but also on sales and purchase management.The general view is that the warehouse serves as the most important component of inventory manage- ment and that the accounting department is
A THREE-DIMENSIONAL ANALYSIS OF THE CENTER OF MASS FOR THREE DIFFERENT JUDO THROWING TECHNIQUES
Directory of Open Access Journals (Sweden)
Rodney T. Imamura
2006-07-01
Full Text Available Four black belt throwers (tori and one black belt faller (uke were filmed and analyzed in three-dimensions using two video cameras (JVC 60 Hz and motion analysis software. Average linear momentum in the anteroposterior (x, vertical (y, and mediolateral (z directions and average resultant impulse of uke's center of mass (COM were investigated for three different throwing techniques; harai-goshi (hip throw, seoi-nage (hand throw, and osoto-gari (leg throw. Each throw was broken down into three main phases; kuzushi (balance breaking, tsukuri (fit-in, and kake (throw. For the harai-goshi and osoto-gari throws, impulse measurements were the largest within kuzushi and tsukuri phases (where collision between tori and uke predominantly occurs. Both throws indicated an importance for tori to create large momentum prior to contact with uke. The seoi-nage throw demonstrated the lowest impulse and maintained forward momentum on the body of uke throughout the entire throw. The harai-goshi and osoto-gari are considered power throws well-suited for large and strong judo players. The seoi-nage throw is considered more technical and is considered well-suited for shorter players with good agility. A form of resistance by uke was found during the kuzushi phase for all throws. The resistance which can be initiated by tori's push or pull allows for the tsukuri phase to occur properly by freezing uke for a good fit-in. Strategies for initiating an effective resistance include initiating movement of uke so that their COM is shifted to their left (for right handed throw by incorporating an instantaneous "snap pull" with the pulling hand during kuzushi to create an opposite movement from uke
Dicty_cDB: Contig-U16035-1 [Dicty_cDB
Lifescience Database Archive (English)
Full Text Available icalis hypothetical LO... 69 5e-10 EF623985_1( EF623985 |pid:none) Crocodylus porosus mitochondrial u... 69 ...5e-10 (Q55DY8) RecName: Full=Mitoferrin; AltName: Full=Mitochondrial s... 69 5e-10 EF623984_1( EF623984 |pid:none) Crocody...toris GS115 chromosome... 67 1e-09 EF623986_1( EF623986 |pid:none) Crocodylus porosus mitochondrial u... 67
A Review of Methods for Moving Boundary Problems
2009-07-01
R. C. Berger under the supervision of Dr. Robert T. McAdory, Chief Estuarine En- gineering Branch. General supervision was provided by Mr. Thomas W...Technical advice needed to complete this work was provided by Drs. Stacy E. Howington and Robert S. Bernard, Coastal and Hydraulics Labora- tory. Typesetting...Lagrangian tracking ideas are also being explored to improve the accuracy of low or- der methods for the LS advection ( Enright et al., 2005). Much of
Soe, kodune ja eestimaine / Ell-Maaja Randküla
Randküla, Ell-Maaja, 1939-2016
2005-01-01
Spa-hotell Georg Ots Kuressaares Tori t. 2. Sisekujundus: Liisi Murula ja Raili Paling, OÜ KOKO Arhitektid. Ehitaja: HEA 5. Hotell pälvis Eesti Sisearhitektide Liidu 2004. a. aastapreemiate konkursil ühiskondliku interjööri preemia. L. Murulast ja R. Palingust, nende tähtsamad tööd. Ill.: 2 plaani, 15 värv. vaadet
Oscillations of thick accretion discs
Energy Technology Data Exchange (ETDEWEB)
Jaroszynski, M.
1986-06-15
The non-axisymmetric oscillations of polytropic, ideal fluid tori rotating in the external gravitational field of a point mass are investigated both numerically and analytically. Normal modes of oscillations are found; their classification into 'radial', 'p', 'g' and 'f' modes is done in analogy to the stellar case. The non-discrete spectrum of modes which are neutral in the limit of axisymmetric perturbations is also present.
Numerical cubature from Archimedes' hat-box theorem
Kuperberg, Greg
2004-01-01
Archimedes' hat-box theorem states that uniform measure on a sphere projects to uniform measure on an interval. This fact can be used to derive Simpson's rule. We present various constructions of, and lower bounds for, numerical cubature formulas using moment maps as a generalization of Archimedes' theorem. We realize some well-known cubature formulas on simplices as projections of spherical designs. We combine cubature formulas on simplices and tori to make new formulas on spheres. In partic...
2012-01-01
research and practice. One of the more recent English language SI tests is the Callsign Acquisition Test (CAT) developed by the United States Army...reliable scores (Rao, Letowski, 2006; Howes, 1957). The CAT combines two-syllable words based on the phonetic alphabet with one syllable numeric digits...were made at the U.S. Army Research Labora- tory by the same native English male talker speaking with a Midwestern accent. The listeners were familiar
European Scientific Notes, Volume 36, Number 12,
1982-12-31
relatively simple labora- fingers must press down large pads that are tory media . The organism’s growth conditions linked to several feet of clanking brass...predictor of y is then -THRIVING BRITISH MAKET IN AEROSPACE y = + x.TheS quadratic loss function also British government statistics transforms to released in...90% of the heavy metals from industrial On 11 November 1982, a meeting sponsored wastes. And although silver is normally highly by the Social
Towards Kaluza-Klein Dark Matter on nilmanifolds
Andriot, David; Cacciapaglia, Giacomo; Deandrea, Aldo; Deutschmann, Nicolas; Tsimpis, Dimitrios
2016-06-01
We present a first study of the field spectrum on a class of negatively-curved compact spaces: nilmanifolds or twisted tori. This is a case where analytical results can be obtained, allowing to check numerical methods. We focus on the Kaluza-Klein expansion of a scalar field. The results are then applied to a toy model where a natural Dark Matter candidate arises as a stable massive state of the bulk scalar.
The Sources of Islamic Revolutionary Conduct
2005-04-01
The Wretched of the Earth , Fanon described the revolutionary struggle in the following way...the other.” His- tory, of course, has witnessed the destructive and revolutionary impact of similar 387Frantz Fanon, The Wretched of the Earth (New...Esposito, John L. Islam and Politics. 3d ed. Syracuse, NY: Syracuse University Press, 1991. Fanon, Frantz. The Wretched of the Earth . New York:
2012-06-01
this report. Active military populations diff er from the U.S. civilian population in many ways. Several factors that diff er in the pop- ulations... factors are associated with cancer risk including tobacco use, food and alcohol consump- tion, physical activity, medication use, his- tory of...cancer screening exami- nations such as mammography, prostate specifi c antigen (PSA) testing, cytological examination of the cervix ( Papanicolaou
Wideband Communications Equipment, AFSC 304X0
1988-11-01
areas that may deserve inclusion in any revision to the documents. Areas of electronics principles (EP) were identified that were performed by 50...from the Electronics Principles Inventory (EPI). The EPI is a knowledge-based inven- tory containing 1,366 questions in 63 electronics-related subject...47 TABLE 21 ELECTRONICS PRINCIPLES USED BY FIFTY PERCENT OR MORE OF AFSC 30450 PERSONNEL MATHEMATICS OSCILLOSCOPES DIRECT CURRENT SEMICONDUCTOR
Bussijuhtide kindrali rasked päevad / Peep Peterson ; interv. Tanel Raig
Peterson, Peep, 1975-
2007-01-01
Eesti Transpordi- ja Teetöötajate Ametiühingu esimees Peep Peterson vastab bussijuhtide ja tööandjate vahelisi lahkhelisid, ametiühinguliikumist ning kokkuleppe sõlmimist puudutavatele küsimustele. Kommenteerivad: Villem Tori. Streikija iseloomuga raske vastane; Henn Pärn. Peterson saavutas maksimumide maksimumi; Harri Taliga. Ametiühingu liidritel erinevad arusaamad. Lisa: Fakte eluloost
Twistless Version of Thirring's Approach to the KAM Theorem for Quadratic Hamiltonians
Chandre, C
1998-01-01
We give a proof of the KAM theorem on the existence of invariant tori for weakly perturbed Hamiltonian systems, based on Thirring's approach for Hamiltonians that are quadratic in the action variables. The main point of this approach is that the iteration of canonical transformations on which the proof is based stays within the space of quadratic Hamiltonians. We show that Thirring's proof for nondegenerate Hamiltonians can be adapted to twistless Hamiltonians. This twistless assumption, in fact, drastically simplifies Thirring's proof.
Institute of Scientific and Technical Information of China (English)
王景文; 黄晓鹂
2010-01-01
以开放存取期刊列表(Direc-tory of OpenAccess Journals,DOAJ)为检索数据源,检索DOAJ收录的所有0AJ,对其创刊数量、年度、国别、语种、Keywords、Subject words等进行计量分析,以揭示国内外OAJ出版的现状.
2014-04-24
pressure ( SBP ), diastolic blood pressure, mean arterial pressure, respira- tory rate (RR), and blood oxygenation (SpO2). Combinations of these vital signs...were also used to derive other measurements including shock index (shock index = HR / SBP ) and pulse pres- sure (pulse pressure = SBP j diastolic...systolic, 40 260 mm Hg/ diastolic, 20 200 mm Hg & SpO2 ranges 1 100 % saturation & SpO2 ranges 0 100 % saturation & 12-lead ECG & 3-lead (Lead II) ECG
Two-frequency self-oscillations in a FitzHugh-Nagumo neural network
Glyzin, S. D.; Kolesov, A. Yu.; Rozov, N. Kh.
2017-01-01
A new mathematical model of a one-dimensional array of FitzHugh-Nagumo neurons with resistive-inductive coupling between neighboring elements is proposed. The model relies on a chain of diffusively coupled three-dimensional systems of ordinary differential equations. It is shown that any finite number of coexisting stable invariant two-dimensional tori can be obtained in this chain by suitably increasing the number of its elements.
JPRS Report, Soviet Union: Political Affairs
2007-11-02
chairman) is still not providing adequate scientific preliminary work and balance in its plans or harmonizing the interests of sectors and regions, the...mechanism will not come about by them- selves. Not all enterprises have drawn up realistic and well- balanced plans for 1988, plans which would ensure...classrooms, auditoria , and dormi- tories, and in the places where the young people live; to reach each and every young man and woman, and learn to actively
Bird, H; Boykoff, M.; Goodman, M. K.; Monbiot, G.; Littler, J.
2009-01-01
Progressive voices in the arts and heritage sector have called for a politics of cultural democracy as a means of empowering all to participate in public life. Through a rejection of policies of 'inclusion', they have asked more searching questions about the role culture can play in the fight for social justice. At the same time the sector is preparing for a change of ideological direction, as rumours run rife about what a future Tory government, highly critical of state intervention, will do...
Lifescience Database Archive (English)
Full Text Available has been implicated in cancer, inflammatory and autoimmune diseases - We identified SHARPIN as the third com...n attenuated activation of NF-κB, leading to chronic dermatitis and an immunodeficiency - Chemical screening...vation. NF-κB is a dimeric transcription factor and has been linked to cancer, inflamma...tory and autoimmune diseases. Here, we determine the structures and functions of various domains in HO
The ETE spherical Tokamak project. IAEA report
Energy Technology Data Exchange (ETDEWEB)
Ludwig, Gerson Otto; Del Bosco, E.; Berni, L.A.; Ferreira, J.G.; Oliveira, R.M.; Andrade, M.C.R.; Shibata, C.S.; Barroso, J.J.; Castro, P.J.; Patire Junior, H. [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Lab. Associado de Plasma]. E-mail: ludwig@plasma.inpe.br
2002-07-01
This paper describes the general characteristics of spherical tokamaks, or spherical tori, with a brief overview of work in this area already performed or in progress at several institutions worldwide. The paper presents also the historical development of the ETE (Spherical Tokamak Experiment) project, its research program, technical characteristics and operating conditions as of October, 2002 at the Associated Plasma Laboratory (LAP) of the National Space Research Institute (INPE) in Brazil. (author)
Manned Airborne Intelligence, Surveillance, and Reconnaissance: Strategic, Tactical . . . Both?
2012-12-01
sought to downsize the force; ISR forces have not always been immune from these cuts. Fortunately, his- tory offers many examples of shifts in manned...friendly fighters to at- tack German aircraft. According to 1st Lt Roger Ihle, one of the earliest American airborne electronic warfare officers, “We...see Michael L. Peterson , “Maybe You Had to Be There: The SIGINT on Thirteen Soviet Shootdowns of U.S. Reconnaissance Aircraft,” Cryptologic
Realistic three-generation models from SO(32) heterotic string theory
Abe, Hiroyuki; Otsuka, Hajime; Takano, Yasufumi
2015-01-01
We search for realistic supersymmetric standard-like models from SO(32) heterotic string theory on factorizable tori with multiple magnetic fluxes. Three chiral ganerations of quarks and leptons are derived from the adjoint and vector representations of SO(12) gauge groups embedded in SO(32) adjoint representation. Massless spectra of our models also include Higgs fields, which have desired Yukawa couplings to quarks and leptons at the tree-level.
Efficient routing mechanisms for Dragonfly networks
Garcia M.; Vallejo E.; Beivide R.; Odriozola M.; Valero M.
2013-01-01
High-radix hierarchical networks are cost-effective topologies for large scale computers. In such networks, routers are organized in super nodes, with local and global interconnections. These networks, known as Dragonflies, outperform traditional topologies such as multi-trees or tori, in cost and scalability. However, depending on the traffic pattern, network congestion can lead to degraded performance. Misrouting (non-minimal routing) can be employed to avoid saturated global or local links...
Guide to Technical Documents. Volume 2. January 1982 through December 1982
1982-12-01
seismically induced soil liquefaction. The report presents were destructively tested at the Forest Research Labors - the current procedures in use to...Navywide testing procedures are compared with the results of labors - average cost for fuel oils, fully utilizing the waste oils tory testing on...according to Report, M. lqbal. A T. Derecho , Skokie, Ill.. Construe- the assumed control mode, and calculates the resulting tion Technology
Gravitational Waves from a Pseudo-Newtonian Kerr Field with Halos
Institute of Scientific and Technical Information of China (English)
王颖; 伍歆
2011-01-01
A close relation between gravitational waveforms and the types of trajectories in a superposed field between a pseudo-Newtonian Kerr black hole and quadrupolar halos is shown in detail The gravitational waveforms emitted from circular, KAM tori and chaotic orbits must be periodic, quasiperiodic and stochastic, respectively. The chaotic motion can maximally enhance both the amplitudes and the energy emission rates of the waves.
So much more than just a gold medal
Institute of Scientific and Technical Information of China (English)
2004-01-01
<正> The recent Athens Olympic Games witnessed a big vic-tory for China, with a total of 32 gold medals, surpassing the country’s 28 won at the Sydney Olympics.Against the backdrop of an improved overall competing capacity, as many as 10,500 athletes participated in the Athens Games, providing harsher than ever competitions for gold medals. Before setting out for the Olympic Games, the
1981-12-02
Portage Chamber of Commerce . Most of the above materials portray the early his- tory of Portage. Analysis of census materials, business directories...supplied the licensed traders by credit. Located at trading posts, their employees, the bourgeois, supplied the voyageur with trade goods and other...necessities. The voyageur made the actual contact with the Indians. Systems of credit became an integral part of the trade. It operated between merchant and
A Dynamical Systems Model for Language Change.
1995-03-01
11, Georgetown Universtiy, 1982. [6] A. S. Kroch. Function and gramar in the his- tory of english : Periphrastic "do.". In Ralph Fa- sold, editor...cally, posit 3 Boolean parameters, Speci er rst/ nal; Head rst/ nal; Verb second allowed or not, leading to 8 possible gram- mars/languages ( English ...Nonverb second populations tend to gain Verb second over time (e.g., English -type languages change to a more German type) contrary to historically
Institute of Scientific and Technical Information of China (English)
LEO ZHANG
2008-01-01
@@ Insider trading has a long and venerated his-tory on the Chinese stock market. Back in ,the 1990s. the stock market was so plagued by retail investors scouting for so-called "insider tips"- often scams that led to massive losses for the investors-that authorities were forced to close down a slew of unethical trust firms and brokerages, crushing investor confidence and leading to an almost four-year bear market.
Energy Technology Data Exchange (ETDEWEB)
Laurence, P.; Shen, M.C.
1982-03-01
Based upon the existence and uniqueness of a solution to the linearized Lundquist equations established previously, the modified energy principle for the sigma-stability of a confined toroidal plasma is rigorously justified. A variational principle is developed to find the infimum of sigma, and an estimate for the maximum growth rate is obtained. The results are also extended to a diffuse pinch and a multiple tori plasma.
Reducing or enhancing chaos using periodic orbits.
Bachelard, R; Chandre, C; Leoncini, X
2006-06-01
A method to reduce or enhance chaos in Hamiltonian flows with two degrees of freedom is discussed. This method is based on finding a suitable perturbation of the system such that the stability of a set of periodic orbits changes (local bifurcations). Depending on the values of the residues, reflecting their linear stability properties, a set of invariant tori is destroyed or created in the neighborhood of the chosen periodic orbits. An application on a paradigmatic system, a forced pendulum, illustrates the method.
Cotangent Models for Integrable Systems
Kiesenhofer, Anna; Miranda, Eva
2017-03-01
We associate cotangent models to a neighbourhood of a Liouville torus in symplectic and Poisson manifolds focusing on b-Poisson/ b-symplectic manifolds. The semilocal equivalence with such models uses the corresponding action-angle theorems in these settings: the theorem of Liouville-Mineur-Arnold for symplectic manifolds and an action-angle theorem for regular Liouville tori in Poisson manifolds (Laurent- Gengoux et al., IntMath Res Notices IMRN 8: 1839-1869, 2011). Our models comprise regular Liouville tori of Poisson manifolds but also consider the Liouville tori on the singular locus of a b-Poisson manifold. For this latter class of Poisson structures we define a twisted cotangent model. The equivalence with this twisted cotangent model is given by an action-angle theorem recently proved by the authors and Scott (Math. Pures Appl. (9) 105(1):66-85, 2016). This viewpoint of cotangent models provides a new machinery to construct examples of integrable systems, which are especially valuable in the b-symplectic case where not many sources of examples are known. At the end of the paper we introduce non-degenerate singularities as lifted cotangent models on b-symplectic manifolds and discuss some generalizations of these models to general Poisson manifolds.
Matrix theory origins of non-geometric fluxes
Chatzistavrakidis, Athanasios
2012-01-01
We explore the origins of non-geometric fluxes within the context of M theory described as a matrix model. Building upon compactifications of Matrix theory on non-commutative tori and twisted tori, we formulate the conditions which describe compactifications with non-geometric fluxes. These turn out to be related to certain deformations of tori with non-commutative and non-associative structures on their phase space. Quantization of flux appears as a natural consequence of the framework and leads to the resolution of non-associativity at the level of the unitary operators. The quantum-mechanical nature of the model bestows an important role on the phase space. In particular, the geometric and non-geometric fluxes exchange their properties when going from position space to momentum space thus providing a duality among the two. Moreover, the operations which connect solutions with different fluxes are described and their relation to T-duality is discussed. Finally, we provide some insights on the effective gaug...
Matrix theory origins of non-geometric fluxes
Chatzistavrakidis, Athanasios; Jonke, Larisa
2013-02-01
We explore the origins of non-geometric fluxes within the context of M theory described as a matrix model. Building upon compactifications of Matrix theory on non-commutative tori and twisted tori, we formulate the conditions which describe compactifications with non-geometric fluxes. These turn out to be related to certain deformations of tori with non-commutative and non-associative structures on their phase space. Quantization of flux appears as a natural consequence of the framework and leads to the resolution of non-associativity at the level of the unitary operators. The quantum-mechanical nature of the model bestows an important role on the phase space. In particular, the geometric and non-geometric fluxes exchange their properties when going from position space to momentum space thus providing a duality among the two. Moreover, the operations which connect solutions with different fluxes are described and their relation to T-duality is discussed. Finally, we provide some insights on the effective gauge theories obtained from these matrix compactifications.
Directory of Open Access Journals (Sweden)
Giuseppe Tarantino
2016-10-01
Full Text Available Background: Hepatocellular Carcinoma (HCC represents the fifth most common malignancy and the third cancer-related cause of death worldwide. Hepatitis B (HBV and C (HCV viral infections and alcohol abuse are the principal etiological factors for HCC. Liver transplantation (LT is oncologically the preferable approach to HCC, as it can remove all the intrahepatic tumor foci, and also the oncogenic cirrhotic liver. The use of mTOR inhibitors (mTORi for immunosuppression after LT for HCC has been proposed due to rapamycin antitumor activity. We decided to review the literature to clarify the oncological role of mTORi after liver transplantation for HCC, analyzing both present condition and future perspectives.Material and Methods: A systematic literature search was performed using PubMed, EMBASE, Scopus and the Cochrane Library Central. The search was limited to studies in humans and to those reported in the English language in the period of time between January 2005 and December 2015. Results: The literature search yielded 93 articles; after duplicates were removed, 77 titles and abstracts were reviewed. Most relevant data and papers are herein reported and discussed.Conclusions: So far, the use of mTORi is encouraging in terms of oncological outcomes for patients underwent LT for HCC, both for prevention and treatment of HCC recurrence although definitive data are still awaited.
Tarantino, Giuseppe; Magistri, Paolo; Ballarin, Roberto; Di Francia, Raffaele; Berretta, Massimiliano; Di Benedetto, Fabrizio
2016-01-01
Background: Hepatocellular Carcinoma (HCC) represents the fifth most common malignancy and the third cancer-related cause of death worldwide. Hepatitis B (HBV) and C (HCV) viral infections and alcohol abuse are the principal etiological factors for HCC. Liver transplantation (LT) is oncologically the preferable approach to HCC, as it can remove all the intrahepatic tumor foci, and also the oncogenic cirrhotic liver. The use of mTOR inhibitors (mTORi) for immunosuppression after LT for HCC has been proposed due to rapamycin antitumor activity. We decided to review the literature to clarify the oncological role of mTORi after liver transplantation for HCC, analyzing both present condition and future perspectives. Material and Methods: A systematic literature search was performed using PubMed, EMBASE, Scopus, and the Cochrane Library Central. The search was limited to studies in humans and to those reported in the English language in the period of time between January 2005 and December 2015. Results: The literature search yielded 93 articles; after duplicates were removed, 77 titles and abstracts were reviewed. Most relevant data and papers are herein reported and discussed. Conclusions: So far, the use of mTORi is encouraging in terms of oncological outcomes for patients underwent LT for HCC, both for prevention and treatment of HCC recurrence although definitive data are still awaited. PMID:27818634
Energy Technology Data Exchange (ETDEWEB)
Richter, Cornelia; Sogalla, Martin; Thielen, Harald; Martens, Reinhard
2015-04-20
The study on the atmospheric radionuclide transport model with radon postprocessor and SBG module (model description version 2.8.0) covers the following issues: determination of emissions, radioactive decay, atmospheric dispersion calculation for radioactive gases, atmospheric dispersion calculation for radioactive dusts, determination of the gamma cloud radiation (gamma submersion), terrain roughness, effective source height, calculation area and model points, geographic reference systems and coordinate transformations, meteorological data, use of invalid meteorological data sets, consideration of statistical uncertainties, consideration of housings, consideration of bumpiness, consideration of terrain roughness, use of frequency distributions of the hourly dispersion situation, consideration of the vegetation period (summer), the radon post processor radon.exe, the SBG module, modeling of wind fields, shading settings.
Torsional shear flow of granular materials: shear localization and minimum energy principle
Artoni, Riccardo; Richard, Patrick
2016-10-01
The rheological properties of granular matter submitted to torsional shear are investigated numerically by means of discrete element method. The shear cell is made of a cylinder filled by grains which are sheared by a bumpy bottom and submitted to a vertical pressure which is applied at the top. Regimes differing by their strain localization features are observed. They originate from the competition between dissipation at the sidewalls and dissipation in the bulk of the system. The effects of the (i) the applied pressure, (ii) sidewall friction, and (iii) angular velocity are investigated. A model, based on the purely local μ (I) -rheology and a minimum energy principle is able to capture the effect of the two former quantities but unable to account the effect of the latter. Although, an ad hoc modification of the model allows to reproduce all the numerical results, our results point out the need for an alternative rheology.
Yang, Xiaoming; Ge, Dengteng; Wu, Gaoxiang; Liao, Zhiwei; Yang, Shu
2016-06-29
Structural color with wide viewing angles has enormous potential applications in pigment, ink formulation, displays, and sensors. However, colors obtained from colloidal assemblies with low refractive index contrast or without black additives typically appear pale. Here, we prepare polypyrrole (PPy) black coated polystyrene (PS) nanoparticles and demonstrate well-defined colors with high color contrast and wide viewing angles under ambient light. Depending on the loading of pyrrole during polymerization, PPy nanogranules of different sizes and coverages are grafted to the surface of PS nanoparticles. The bumpy particles can self-assemble into quasi-amorphous arrays, resulting in low angle dependent structure colors under ambient light. The color can be tuned by the size of the PS nanoparticles, and the presence of the PPy black on PS nanoparticles enhances the color contrast by suppressing incoherent and multiple scattering.
Vibration Energy Harvesting on Vehicle Suspension Using Rotary and Linear Electromagnetic Generator
Directory of Open Access Journals (Sweden)
Arif Indro Sultoni
2013-04-01
Full Text Available In this paper, we discuss comparation of vehicle vibration energy harvesting between rotary and linear electromagnetic generator. We construct the two model of energy harvester mechanism and then analyze both of energy absorbtion and vehicle comfortability. Furthermore, we analyze both of energy absorbtion and vehicle comfortability. Vehicle is modeled as quarter car. Rotarty generator harvests 2.5 x 10-4 Watt. The other hand, linear generator has viscous characteristic and capable to generates 90 Watts with 12 Volt power supply for 0.03 m amplitude of bumpy road input. Linear generator reduces oscillation with 1.2 sec settling time. It is more comfort than the angular which has 3 sec in settling time. With unnevenees road input, mean power of this generator is 64 Watt.
Pseudoxanthoma-elasticum-like skin changes induced by penicillamine.
Bolognia, J L; Braverman, I
1992-01-01
The interference of penicillamine with collagen and elastin cross-linking can lead to wrinkling and anetoderma-like lesions in flexural areas as well as fragility and hemorrhagic blisters in pressure areas. These changes are seen primarily in patients with Wilson's disease or cystinuria who are on long-term therapy. This is a report of a patient with cystinuria on long-term, high-dose penicillamine who developed pseudoxanthoma-elasticum-like lesions. Coalescent yellow papules with a 'plucked-chicken skin' appearance were seen in the axillae and on the neck while redundant skin folds were noted in the anterior axillary line and lower buttocks. By light and electron microscopy, involved and uninvolved skin demonstrated 'lumpy-bumpy' dermal elastic fibers with no calcium deposition. These histologic changes are similar to those previously described in patients with penicillamine-induced skin lesions.
Transport simulation for EBT reactor
Energy Technology Data Exchange (ETDEWEB)
Uckan, T.; Uckan, N.A.; Jaeger, E.F.
1983-08-01
Transport simulation and modeling studies for the ELMO Bumpy Torus (EBT) reactor are carried out by using zero-dimensional (0-D) and one-and-one-half-dimensional (1 1/2-D) transport calculations. The time-dependent 0-D model is used for global analysis, whereas the 1 1/2-D radial transport code is used for accurate determination of density, temperature, and ambipolar potential profiles and of the role of these profiles in reactor plasma performance. Analysis with the 1 1/2-D transport code shows that profile effects near the outer edge of the hot electron ring lead to enhanced confinement by at least a factor of 2 to 5 beyond the simple scaling that is obtained from the global analysis. The radial profiles of core plasma density and temperatures (or core pressure) obtained from 1 1/2-D transport calculations are found to be similar to those theoretically required for stability.