An elementary introduction is given to the concept of anyons-quantum particles whose 'statistics' interpolate smoothly between those of bosons and fermions. Such particles - or quasi-particle excitations - can occur in two-dimensional systems in which the particles experience strong short-range mutual repulsions. These circumstances effectively mean that one has to apply quantum mechanics to a configuration space in which some points are excluded (i.e. it has 'holes') - namely, those points where two particles would coincide. The Aharonov-Bohm effect provides the simplest physical example of quantum mechanics in such a non-simply connected space, and is also fundamental to a simple model for anyons. A qualitative introduction is given to two currently proposed physical applications of anyons: high temperature superconductivity, and the (fractional) quantum Hall effect. (author)
A general introduction to the anyon model (braid group, Chern-Simons Lagrangian and Aharonov-Bohm Hamiltonian formulations) is given. A review follows on exact results and possible ways of getting additional information, as mean field approach, perturbation theory, and projection on the lowest Landau level of an external magnetic field. (author). 8 refs
Rao, Sumathi
1992-01-01
In this set of lectures, we give a pedagogical introduction to the subject of anyons. We discuss 1) basic concepts in anyon physics, 2) quantum mechanics of two anyon systems, 3) statistical mechanics of many anyon systems, 4) mean field approach to many anyon systems and anyon superconductivity, 5) anyons in field theory and 6) anyons in the Fractional Quantum Hall Effect (FQHE). (Based on lectures delivered at the VII SERC school in High Energy Physics at the Physical Research Laboratory, A...
Cortes, J. L.; Plyushchay, M. S.
1995-01-01
A model-independent formulation of anyons as spinning particles is presented. The general properties of the classical theory of (2+1)-dimensional relativistic fractional spin particles and some properties of their quantum theory are investigated. The relationship between all the known approaches to anyons as spinning particles is established. Some widespread misleading notions on the general properties of (2+1)-dimensional anyons are removed.
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Particles called anyons that do not fit into the usual categories of fermions and bosons may lead to high-performance quantum computers, explains Frank Wilczek. Textbooks on quantum mechanics traditionally divide elementary particles into two types: fermions and bosons. Fermions such as electrons have antisymmetric wavefunctions, which means that a minus sign (i.e. a phase of p) is introduced into a system when two fermions in that system are interchanged. Bosons such as photons, on the other hand, have symmetric wavefunctions that do not change when two bosons are exchanged. Fermions and bosons also have different intrinsic angular momentum or spin: fermions have half-integer spins in quantum units, while bosons have integer spins. But in 1977 a small band of theoretical physicists spearheaded by Jon Leinaas and Jan Myrheim at Oslo University in Norway realized that for particles living in two, rather than three, dimensions there are many other mathematical possibilities. Among these are particles that introduce any phase when they are interchanged. In the early 1980s I named the hypothetical new particles 'anyons', the idea being that anything goes - but I did not lose much sleep anticipating their discovery. Very soon afterwards, however, Bert Halperin at Harvard University found the concept of anyons useful in understanding certain aspects of the fractional quantum Hall effect, which describes the modifications that take place in electronics at low temperatures in strong magnetic fields. In 1985 Dan Arovas, Bob Schrieffer and I, all of us then at the Kavli Institute for Theoretical Physics in Santa Barbara, proved that a successful theory of the fractional quantum Hall effect does indeed require particles that are neither bosons nor fermions. These developments spawned a vast literature, featuring beautiful and elaborate mathematics. Until very recently, however, the subject of anyons had still been almost entirely theoretical. Suddenly, over the last few
Flowing holographic anyonic superfluid
Jokela, Niko; Lifschytz, Gilad; Lippert, Matthew
2014-01-01
We investigate the flow of a strongly coupled anyonic superfluid based on the holographic D3-D7' probe brane model. By analyzing the spectrum of fluctuations, we find the critical superfluid velocity, as a function of the temperature, at which the flow stops being dissipationless when flowing past a barrier. We find that at a larger velocity the flow becomes unstable even in the absence of a barrier.
Holographic anyonic superfluidity
Jokela, Niko; Lifschytz, Gilad; Lippert, Matthew
2013-01-01
Starting with a holographic construction for a fractional quantum Hall state based on the D3-D7' system, we explore alternative quantization conditions for the bulk gauge fields. This gives a description of a quantum Hall state with various filling fractions. For a particular alternative quantization of the bulk gauge fields, we obtain a holographic anyon fluid in a vanishing background magnetic field. We show that this system is a superfluid, exhibiting the relevant gapless excitation.
Neutral and Charged Anyon Fluids
Hosotani, Yutaka
1993-01-01
(Review) Properties of neutral and charged anyon fluids are examined, with the main focus on the question whether or not a charged anyon fluid exhibits a superconductivity at zero and finite temperature. Quantum mechanics of anyon fluids is precisely described by Chern-Simons gauge theory. The random phase approximation (RPA), the linearized self-consistent field method (SCF), and the hydrodynamic approach employed in the early analysis of anyon fluids are all equivalent. Relations and differ...
Anyons, modular invariance and anyon gauge for arbitrary rational statistics
We perform the implementation of modular invariance for a system of free anyons on a torus, described by means of the Chern-Simons action, for arbitrary rational Chern-Simons coupling constant. We explain in which sense the 'anyon gauge', in which the wavefunction is multivalued, can be achieved on the torus. (orig.)
Montonen, Claus
1995-01-01
Lectures presented at the VI Mexican School of Particles and Fields, Villahermosa, 3-7 October, 1994. Contents: 1. Introduction 2. The Symmetry Group Approach to the Quantum Mechanics of Identical Particles 3. How Come Anyons? 4. The Transmutation of Statistics into a Topological Interaction 5. The Chern-Simons Action and Anyon Statistics 6. Nonrelativistic Chern-Simons-(Maxwell) Field Theory 7. Epilogue
Holographic anyonization: a systematic approach
Ihl, Matthias; Jokela, Niko; Zingg, Tobias
2016-06-01
Anyons have garnered substantial interest theoretically as well as experimentally. Due to the intricate nature of their interactions, however, even basic notions such as the equation of state for any kind of anyon gas have eluded a profound understanding so far. Using holography as a guiding principle, we propose a general method for an alternative quantization of electromagnetic degrees of freedom in the gravitational dual to obtain an effective physical description of strongly correlated anyonic systems. We then demonstrate the application of this prescription in a toy model of an anyonic fluid at finite charge density and magnetic field, dual to a dyonic black brane in AdS 4, and compute the equation of state and various transport coefficients explicitly.
Holographic anyonization: A systematic approach
Ihl, Matthias; Zingg, Tobias
2016-01-01
Anyons have garnered substantial interest theoretically as well as experimentally. Due to the intricate nature of their interactions, however, even basic notions such as the equation of state for any kind of anyon gas have eluded a profound understanding so far. Using holography as a guiding principle, we propose a general method for an alternative quantization of electromagnetic degrees of freedom in the gravitational dual to obtain an effective physical description of strongly correlated anyonic systems. We then demonstrate the application of this prescription in a toy model of an anyonic fluid at finite charge density and magnetic field, dual to a dyonic black brane in AdS_4, and compute the equation of state and various transport coefficients explicitly.
Anyon condensation and tensor categories
Kong, Liang, E-mail: kong.fan.liang@gmail.com [Institute for Advanced Study (Science Hall), Tsinghua University, Beijing 100084 (China); Department of Mathematics and Statistics, University of New Hampshire, Durham, NH 03824 (United States)
2014-09-15
Instead of studying anyon condensation in various concrete models, we take a bootstrap approach by considering an abstract situation, in which an anyon condensation happens in a 2-d topological phase with anyonic excitations given by a modular tensor category C; and the anyons in the condensed phase are given by another modular tensor category D. By a bootstrap analysis, we derive a relation between anyons in D-phase and anyons in C-phase from natural physical requirements. It turns out that the vacuum (or the tensor unit) A in D-phase is necessary to be a connected commutative separable algebra in C, and the category D is equivalent to the category of local A-modules as modular tensor categories. This condensation also produces a gapped domain wall with wall excitations given by the category of A-modules in C. A more general situation is also studied in this paper. We will also show how to determine such algebra A from the initial and final data. Multi-condensations and 1-d condensations will also be briefly discussed. Examples will be given in the toric code model, Kitaev quantum double models, Levin–Wen types of lattice models and some chiral topological phases.
Anyon condensation and tensor categories
Liang Kong
2014-09-01
Full Text Available Instead of studying anyon condensation in various concrete models, we take a bootstrap approach by considering an abstract situation, in which an anyon condensation happens in a 2-d topological phase with anyonic excitations given by a modular tensor category C; and the anyons in the condensed phase are given by another modular tensor category D. By a bootstrap analysis, we derive a relation between anyons in D-phase and anyons in C-phase from natural physical requirements. It turns out that the vacuum (or the tensor unit A in D-phase is necessary to be a connected commutative separable algebra in C, and the category D is equivalent to the category of local A-modules as modular tensor categories. This condensation also produces a gapped domain wall with wall excitations given by the category of A-modules in C. A more general situation is also studied in this paper. We will also show how to determine such algebra A from the initial and final data. Multi-condensations and 1-d condensations will also be briefly discussed. Examples will be given in the toric code model, Kitaev quantum double models, Levin–Wen types of lattice models and some chiral topological phases.
Anomalous magnetic moment of anyons
Gat, G; Gat, Gil; Ray, Rashmi
1994-01-01
The anomalous magnetic moment of anyons is calculated to leading order in a 1/N expansion. It is shown that the gyromagnetic ratio g remains 2 to the leading order in 1/N. This result strongly supports that obtained in \\cite{poly}, namely that g=2 is in fact exact.
The hunt for anyon superconductivity
Various models of high-temperature superconductivity, including in particular the models with particles obeying fractional statistics (anyons), imply spontaneously broken time-reversal symmetry. Experiments which might show manifestations of this broken symmetry include muon spin relaxation, and optical experiments looking for an antisymmetric contribution to the dielectric tensor. The current experimental situation is very confusing, however, as results from different groups are seemingly contradictory. (orig.)
Anyons in the operational formalism
The operational formalism to quantum mechanics seeks to base the theory on a firm foundation of physically well-motivated axioms [1]. It has succeeded in deriving the Feynman rules [2] for general quantum systems. Additional elaborations have applied the same logic to the question of identical particles, confirming the so-called Symmetrization Postulate [3]: that the only two options available are fermions and bosons [4, 5]. However, this seems to run counter to results in two-dimensional systems, which allow for anyons, particles with statistics which interpolate between Fermi-Dirac and Bose-Einstein (see [6] for a review). In this talk we will show that the results in two dimensions can be made compatible with the operational results. That is, we will show that anyonic behavior is a result of the topology of the space in two dimensions [7], and does not depend on the particles being identical; but that nevertheless, if the particles are identical, the resulting system is still anyonic
Systematically generated two-qubit anyon braids
Carnahan, Caitlin; Zeuch, Daniel; Bonesteel, N. E.
2016-05-01
Fibonacci anyons are non-Abelian particles for which braiding is universal for quantum computation. Reichardt has shown how to systematically generate nontrivial braids for three Fibonacci anyons which yield unitary operations with off-diagonal matrix elements that can be made arbitrarily small in a particular natural basis through a simple and efficient iterative procedure. This procedure does not require brute force search, the Solovay-Kitaev method, or any other numerical technique, but the phases of the resulting diagonal matrix elements cannot be directly controlled. We show that despite this lack of control the resulting braids can be used to systematically construct entangling gates for two qubits encoded by Fibonacci anyons.
Topological vacuum bubbles by anyon braiding
Han, Cheolhee; Park, Jinhong; Gefen, Yuval; Sim, H.-S.
2016-03-01
According to a basic rule of fermionic and bosonic many-body physics, known as the linked cluster theorem, physical observables are not affected by vacuum bubbles, which represent virtual particles created from vacuum and self-annihilating without interacting with real particles. Here we show that this conventional knowledge must be revised for anyons, quasiparticles that obey fractional exchange statistics intermediate between fermions and bosons. We find that a certain class of vacuum bubbles of Abelian anyons does affect physical observables. They represent virtually excited anyons that wind around real anyonic excitations. These topological bubbles result in a temperature-dependent phase shift of Fabry-Perot interference patterns in the fractional quantum Hall regime accessible in current experiments, thus providing a tool for direct and unambiguous observation of elusive fractional statistics.
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Statistical physics of an anyon gas
In quantum two-dimensional physics, anyons are particles which have an intermediate statistics between Bose-Einstein and Fermi-Dirac statistics. The wave amplitude can change by an arbitrary phase under particle exchanges. Contrary to bosons or fermions, the permutation group cannot uniquely characterize this phase and one must introduce the braid group. One shows that the statistical ''interaction'' is equivalent to an Aharonov-Bohm interaction which derives from a Chern-Simons lagrangian. The main subject of this thesis is the thermodynamics of an anyon gas. Since the complete spectrum of N anyons seems out of reach, we have done a perturbative computation of the equation of state at second order near Bose or Fermi statistics. One avoids ultraviolet divergences by noticing that the short-range singularities of the statistical interaction enforce the wave functions to vanish when two particles approach each other (statistical exclusion). The gas is confined in a harmonic well in order to obtain the thermodynamics limit when the harmonic attraction goes to zero. Infrared divergences thus cancel in this limit and a finite virial expansion is obtained. The complexity of the anyon model appears in this result. We have also computed the equation of state of an anyon gas in a magnetic field strong enough to project the system in its degenerate groundstate. This result concerns anyons with any statistics. One then finds an exclusion principle generalizing the Pauli principle to anyons. On the other hand, we have defined a model of two-dimensional particles topologically interacting at a distance. The anyon model is recovered as a particular case where all particles are identical. (orig.)
Continuous error correction for Ising anyons
Hutter, Adrian; Wootton, James R.
2016-04-01
Quantum gates in topological quantum computation are performed by braiding non-Abelian anyons. These braiding processes can presumably be performed with very low error rates. However, to make a topological quantum computation architecture truly scalable, even rare errors need to be corrected. Error correction for non-Abelian anyons is complicated by the fact that it needs to be performed on a continuous basis, and further errors may occur while we are correcting existing ones. Here, we prove the feasibility of this task, establishing non-Abelian anyons as a viable platform for scalable quantum computation. We thereby focus on Ising anyons as the most prominent example of non-Abelian anyons and show that for these a finite error rate can indeed be corrected continuously. There is a threshold error rate pc>0 such that for all error rates p
Topological vacuum bubbles by anyon braiding
Han, Cheolhee; Park, Jinhong; Gefen, Yuval; Sim, H.-S.
2016-01-01
According to a basic rule of fermionic and bosonic many-body physics, known as the linked cluster theorem, physical observables are not affected by vacuum bubbles, which represent virtual particles created from vacuum and self-annihilating without interacting with real particles. Here we show that this conventional knowledge must be revised for anyons, quasiparticles that obey fractional exchange statistics intermediate between fermions and bosons. We find that a certain class of vacuum bubbl...
Semi-Classical Quantization of the Many-Anyon System
Illuminati, Fabrizio
1992-01-01
We discuss the problem of N anyons in harmonic well, and derive the semi-classical spectrum as an exactly solvable limit of the many-anyon Hamiltonian. The relevance of our result to the solution of the anyon-gas model is discussed.
Semi-Classical Quantization of the Many-Anyon System
Illuminati, F
1993-01-01
We discuss the problem of N anyons in harmonic well, and derive the semi-classical spectrum as an exactly solvable limit of the many-anyon Hamiltonian. The relevance of our result to the solution of the anyon-gas model is discussed.
Globally symmetric topological phase: from anyonic symmetry to twist defect
Teo, Jeffrey C. Y.
2016-04-01
Topological phases in two dimensions support anyonic quasiparticle excitations that obey neither bosonic nor fermionic statistics. These anyon structures often carry global symmetries that relate distinct anyons with similar fusion and statistical properties. Anyonic symmetries associate topological defects or fluxes in topological phases. As the symmetries are global and static, these extrinsic defects are semiclassical objects that behave disparately from conventional quantum anyons. Remarkably, even when the topological states supporting them are Abelian, they are generically non-Abelian and powerful enough for topological quantum computation. In this article, I review the most recent theoretical developments on symmetries and defects in topological phases.
Globally symmetric topological phase: from anyonic symmetry to twist defect
Topological phases in two dimensions support anyonic quasiparticle excitations that obey neither bosonic nor fermionic statistics. These anyon structures often carry global symmetries that relate distinct anyons with similar fusion and statistical properties. Anyonic symmetries associate topological defects or fluxes in topological phases. As the symmetries are global and static, these extrinsic defects are semiclassical objects that behave disparately from conventional quantum anyons. Remarkably, even when the topological states supporting them are Abelian, they are generically non-Abelian and powerful enough for topological quantum computation. In this article, I review the most recent theoretical developments on symmetries and defects in topological phases. (topical review)
Non-relativistic anyons from holography
Jokela, Niko; Ramallo, Alfonso V
2016-01-01
We study generic types of holographic matter residing in Lifshitz invariant defect field theory as modeled by adding probe D-branes in the bulk black hole spacetime characterized by dynamical exponent $z$ and with hyperscaling violation exponent $\\theta$. Our main focus will be on the collective excitations of the dense matter in the presence of an external magnetic field. Constraining the defect field theory to 2+1 dimensions, we will also allow the gauge fields become dynamical and study the properties of a strongly coupled anyonic fluid. We will deduce the universal properties of holographic matter and find that the Einstein relation always holds.
Fundamental Symmetries of the Modified Anyonic Particle
Nejad, Salman Abarghouei; Monemzadeh, Majid
2015-01-01
We try to increase the fundamental symmetries of the anyonic particle with the help of the symplectic formalism of constrained systems and gauging the model. The main idea of this approach is based on the embedding of the model in an extended phase space. After the gauging process had done, we obtain generators of gauge transformations of the model. Finally, by extracting the corresponding Poisson structure of all constraints, we compare the effect of gauging on the the phase spaces, the number of physical degrees of freedom, and canonical structures of both primary and gauged models.
Hardy and Lieb-Thirring Inequalities for Anyons
Lundholm, Douglas Björn Alexander; Solovej, Jan Philip
2013-01-01
We consider the many-particle quantum mechanics of anyons, i.e. identical particles in two space dimensions with a continuous statistics parameter α∈[0,1] ranging from bosons (α = 0) to fermions (α = 1). We prove a (magnetic) Hardy inequality for anyons, which in the case that α is an odd numerat...... fraction implies a local exclusion principle for the kinetic energy of such anyons. From this result, and motivated by Dyson and Lenard’s original approach to the stability of fermionic matter in three dimensions, we prove a Lieb-Thirring inequality for these types of anyons....
Simulation of braiding anyons using matrix product states
Ayeni, Babatunde M.; Singh, Sukhwinder; Pfeifer, Robert N. C.; Brennen, Gavin K.
2016-04-01
Anyons exist as pointlike particles in two dimensions and carry braid statistics, which enable interactions that are independent of the distance between the particles. Except for a relatively few number of models, which are analytically tractable, much of the physics of anyons remains still unexplored. In this paper, we show how U(1) symmetry can be combined with the previously proposed anyonic matrix product states to simulate ground states and dynamics of anyonic systems on a lattice at any rational particle number density. We provide proof of principle by studying itinerant anyons on a one-dimensional chain where no natural notion of braiding arises and also on a two-leg ladder where the anyons hop between sites and possibly braid. We compare the result of the ground-state energies of Fibonacci anyons against hardcore bosons and spinless fermions. In addition, we report the entanglement entropies of the ground states of interacting Fibonacci anyons on a fully filled two-leg ladder at different interaction strength, identifying gapped or gapless points in the parameter space. As an outlook, our approach can also prove useful in studying the time dynamics of a finite number of non-Abelian anyons on a finite two-dimensional lattice.
Aharonov-Bohm Effect and the Supersymmetry of Identical Anyons
V. Jakubský
2010-01-01
We briefly review the relation between the Aharonov-Bohm effect and the dynamical realization of anyons. We show how the particular symmetries of the Aharonov-Bohm model give rise to the (nonlinear) supersymmetry of the two-body system of identical anyons.
Aharonov-Bohm Effect and the Supersymmetry of Identical Anyons
V. Jakubský
2010-01-01
Full Text Available We briefly review the relation between the Aharonov-Bohm effect and the dynamical realization of anyons. We show how the particular symmetries of the Aharonov-Bohm model give rise to the (nonlinear supersymmetry of the two-body system of identical anyons.
Energy Spectrum of Anyons in a Magnetic Field
Illuminati, F
1993-01-01
For the many-anyon system in external magnetic field, we derive the energy spectrum as an exact solution of the quantum eigenvalue problem with particular topological constraints. Our results agree with the numerical spectra recently obtained for the 3- and the 4-anyon systems.
Energy Spectrum of Anyons in a Magnetic Field
Illuminati, Fabrizio
1992-01-01
For the many-anyon system in external magnetic field, we derive the energy spectrum as an exact solution of the quantum eigenvalue problem with particular topological constraints. Our results agree with the numerical spectra recently obtained for the 3- and the 4-anyon systems.
Anyons in quantum mechanics with a minimal length
Buisseret, Fabien
2016-01-01
The existence of anyons, \\textit{i.e.} quantum states with an arbitrary spin, is a generic feature of standard quantum mechanics in $(2+1)-$dimensional Minkowski spacetime. Here it is shown that relativistic anyons may exist also in quantum theories where a minimal length is present. The interplay between minimal length and arbitrary spin effects are discussed.
Systematically Generated Two-Qubit Braids for Fibonacci Anyons
Zeuch, Daniel; Carnahan, Caitlin; Bonesteel, N. E.
We show how two-qubit Fibonacci anyon braids can be generated using a simple iterative procedure which, in contrast to previous methods, does not require brute force search. Our construction is closely related to that of, but with the new feature that it can be used for three-anyon qubits as well as four-anyon qubits. The iterative procedure we use, which was introduced by Reichardt, generates sequences of three-anyon weaves that asymptotically conserve the total charge of two of the three anyons, without control over the corresponding phase factors. The resulting two-qubit gates are independent of these factors and their length grows as log 1/ ɛ, where ɛ is the error, which is asymptotically better than the Solovay-Kitaev method.
Interacting anyons in topological quantum liquids: the golden chain.
Feiguin, Adrian; Trebst, Simon; Ludwig, Andreas W W; Troyer, Matthias; Kitaev, Alexei; Wang, Zhenghan; Freedman, Michael H
2007-04-20
We discuss generalizations of quantum spin Hamiltonians using anyonic degrees of freedom. The simplest model for interacting anyons energetically favors neighboring anyons to fuse into the trivial ("identity") channel, similar to the quantum Heisenberg model favoring neighboring spins to form spin singlets. Numerical simulations of a chain of Fibonacci anyons show that the model is critical with a dynamical critical exponent z=1, and described by a two-dimensional (2D) conformal field theory with central charge c=7/10. An exact mapping of the anyonic chain onto the 2D tricritical Ising model is given using the restricted-solid-on-solid representation of the Temperley-Lieb algebra. The gaplessness of the chain is shown to have topological origin. PMID:17501404
Anyons on Higher Genus Surfaces - a Constructive Approach
Hansson, T. H.; Karlhede, Anders; Westerberg, Erik
1993-01-01
We reconsider the problem of anyons on higher genus surfaces by embedding them in three dimensional space. From a concrete realization based on three dimensional flux tubes bound to charges moving on the surface, we explicitly derive all the representations of the spinning braid group. The component structure of the wave functions arises from winding the flux tubes around the handles. We also argue that the anyons in our construction must fulfil the generalized spin-statistics relation.
Anyonic partition functions and windings of planar Brownian motion
The computation of the N-cycle Brownian paths contribution FN(α) to the N-anyon partition function is addressed. A detailed numerical analysis based on a random walk on a lattice indicates that FN0(α)=product k=1N-1[1-(N/k)α]. In the paramount three-anyon case, one can show that F3(α) is built by linear states belonging to the bosonic, fermionic, and mixed representations of S3
Field theory of anyons and the fractional quantum Hall effect
Viefers, S.F
1997-11-01
The thesis is devoted to a theoretical study of anyons, i.e. particles with fractional statistics moving in two space dimensions, and the quantum Hall effect. The latter constitutes the only known experimental realization of anyons in that the quasiparticle excitations in the fractional quantum Hall system are believed to obey fractional statistics. First, the properties of ideal quantum gases in two dimensions and in particular the equation of state of the free anyons gas are discussed. Then, a field theory formulation of anyons in a strong magnetic field is presented and later extended to a system with several species of anyons. The relation of this model to fractional exclusion statistics, i.e. intermediate statistics introduced by a generalization of the Pauli principle, and to the low-energy excitations at the edge of the quantum Hall system is discussed. Finally, the Chern-Simons-Landau-Ginzburg theory of the fractional quantum Hall effect is studied, mainly focusing on edge effects; both the ground state and the low-energy edge excitations are examined in the simple one-component model and in an extended model which includes spin effects.
Anyons and the quantum Hall effect-A pedagogical review
The dichotomy between fermions and bosons is at the root of many physical phenomena, from metallic conduction of electricity to super-fluidity, and from the periodic table to coherent propagation of light. The dichotomy originates from the symmetry of the quantum mechanical wave function to the interchange of two identical particles. In systems that are confined to two spatial dimensions particles that are neither fermions nor bosons, coined 'anyons', may exist. The fractional quantum Hall effect offers an experimental system where this possibility is realized. In this paper we present the concept of anyons, we explain why the observation of the fractional quantum Hall effect almost forces the notion of anyons upon us, and we review several possible ways for a direct observation of the physics of anyons. Furthermore, we devote a large part of the paper to non-abelian anyons, motivating their existence from the point of view of trial wave functions, giving a simple exposition of their relation to conformal field theories, and reviewing several proposals for their direct observation
Bosons, fermions and anyons in the plane, and supersymmetry
Horvathy, Peter A; Valenzuela, Mauricio
2010-01-01
Universal vector wave equations allowing for a unified description of anyons, and also of usual bosons and fermions in the plane are proposed. The existence of two essentially different types of anyons, based on unitary and also on non-unitary infinite-dimensional half-bounded representations of the (2+1)D Lorentz algebra is revealed. Those associated with non-unitary representations interpolate between bosons and fermions. The extended formulation of the theory includes the previously known Jackiw-Nair (JN) and Majorana-Dirac (MD) descriptions of anyons as particular cases, and allows us to compose bosons and fermions from entangled anyons. The theory admits a simple supersymmetric generalization, in which the JN and MD systems are unified in N=1 and N=2 supermultiplets. Two different non-relativistic limits of the theory are investigated. The usual one generalizes Levy-Leblond's spin 1/2 theory to arbitrary spin, as well as to anyons. The second, "Jackiw-Nair" limit (that corresponds to Inonu-Wigner contrac...
Field theory of anyons and the fractional quantum Hall effect
The thesis is devoted to a theoretical study of anyons, i.e. particles with fractional statistics moving in two space dimensions, and the quantum Hall effect. The latter constitutes the only known experimental realization of anyons in that the quasiparticle excitations in the fractional quantum Hall system are believed to obey fractional statistics. First, the properties of ideal quantum gases in two dimensions and in particular the equation of state of the free anyons gas are discussed. Then, a field theory formulation of anyons in a strong magnetic field is presented and later extended to a system with several species of anyons. The relation of this model to fractional exclusion statistics, i.e. intermediate statistics introduced by a generalization of the Pauli principle, and to the low-energy excitations at the edge of the quantum Hall system is discussed. Finally, the Chern-Simons-Landau-Ginzburg theory of the fractional quantum Hall effect is studied, mainly focusing on edge effects; both the ground state and the low-energy edge excitations are examined in the simple one-component model and in an extended model which includes spin effects
Anyonic Partition Functions and Windings of Planar Brownian Motion
Desbois, Jean; Heinemann, Christine; Ouvry, Stéphane
1994-01-01
The computation of the $N$-cycle brownian paths contribution $F_N(\\alpha)$ to the $N$-anyon partition function is adressed. A detailed numerical analysis based on random walk on a lattice indicates that $F_N^{(0)}(\\alpha)= \\prod_{k=1}^{N-1}(1-{N\\over k}\\alpha)$. In the paramount $3$-anyon case, one can show that $F_3(\\alpha)$ is built by linear states belonging to the bosonic, fermionic, and mixed representations of $S_3$.
Critical points of the anyon-Hubbard model
Arcila-Forero, J.; Franco, R.; Silva-Valencia, J.
2016-07-01
Anyons are particles with fractional statistics that exhibit a nontrivial change in the wave function under an exchange of particles. Anyons can be considered to be a general category of particles that interpolate between fermions and bosons. We determined the position of the critical points of the one-dimensional anyon-Hubbard model, which was mapped to a modified Bose-Hubbard model where the tunneling depends on the local density and the interchange angle. We studied the latter model by using the density-matrix renormalization-group method and observed that gapped (Mott insulator) and gapless (superfluid) phases characterized the phase diagram, regardless of the value of the statistical angle. The phase diagram for higher densities was calculated and showed that the Mott lobes increase (decrease) as a function of the statistical angle (global density). The position of the critical point separating the gapped and gapless phases was found using quantum information tools, namely the block von Neumann entropy. We also studied the evolution of the critical point with the global density and the statistical angle and showed that the anyon-Hubbard model with a statistical angle θ =π /4 is in the same universality class as the Bose-Hubbard model with two-body interactions.
Generalized ADE classification of topological boundaries and anyon condensation
Hung, Ling-Yan; Wan, Yidun
2015-07-01
In this paper we would like to demonstrate how the known, physically-motivat-ed rules of anyon condensation proposed by Bais et al. can be recovered by the mathematics of twist-free commutative separable Frobenius algebra (CSFA). In some simple cases, those physical rules are also sufficient conditions defining a twist-free CSFA. This allows us to make use of the generalized ADE classification of CSFA's and modular invariants to classify anyon condensation, characterize the topological boundaries between topological field theories and thus describe all gapped domain walls and gapped boundaries of a large class of topological orders. In fact, this classification is equivalent to the classification we proposed in ref. [1].
Precise analysis of the three-anyon spectrum
We find the exact numbers of ''good'' (found analytically) and ''bad'' states in three-anyon problem. It is shown that the relative number of the ''good'' states tends to one third with energy increasing. We produce an outline of the spectrum which reflects correctly the interpolation between bosonic and fermionic states. We carry out a straightforward calculation of the partition function, which reproduces the known results for the third virial coefficient. 22 refs.; 2 figs.; 7 tab. (author)
Generally Covariant Conservative Energy-Momentum for Gravitational Anyons
Feng, Sze-Shiang; Duan, Yi-Shi
1999-01-01
We obtain a generally covariant conservation law of energy-momentum for gravitational anyons by the general displacement transform. The energy-momentum currents have also superpotentials and are therefore identically conserved. It is shown that for Deser's solution and Clement's solution, the energy vanishes. The reasonableness of the definition of energy-momentum may be confirmed by the solution for pure Einstein gravity which is a limit of vanishing Chern-Simons coulping of gravitational an...
Supersymmetry between Jackiw-Nair and Dirac-Majorana anyons
Horvathy, Peter A; Valenzuela, Mauricio
2010-01-01
The Jackiw-Nair description of anyons combines spin-1 topologically massive fields with the discrete series representation of the Lorentz algebra, which has fractional spin. In the Dirac-Majorana formulation the spin-1 part is replaced by the spin 1/2 planar Dirac equation. The two models are shown to belong to an N=1 supermultiplet, which carries a super-Poincar\\'e symmetry.
Park, Annie Jihyun; McKay, Emma; Lu, Dawei; Laflamme, Raymond
2016-01-01
Anyons, quasiparticles living in two-dimensional spaces with exotic exchange statistics, can serve as the fundamental units for fault-tolerant quantum computation. However, experimentally demonstrating anyonic statistics is a challenge due to the technical limitations of current experimental platforms. Here, we take a state perpetration approach to mimic anyons in the Kitaev lattice model using a 7-qubit nuclear magnetic resonance quantum simulator. Anyons are created by dynamically preparing...
Supersymmetric anyon model coupled to the electromagnetic field
Foussats, A.; Manavella, E.; Repetto, C.; Zandron, O.P.; Zandron, O.S. [UNR, Rosario (Argentina)
1996-08-01
We construct a supersymmetric gauge model describing the electromagnetic interaction of anyons. This is done by means of the supersymmetric generalization of the U(1) X U(1) gauge theory. The model contains the statistical U(1) gauge field endowed with a Chern-Simons mass term and the electromagnetic field, both with the corresponding superpartners, coupled to matter fields. This constrained system is analyzed from the Hamiltonian point of view and the canonical quantization is found. The path-integral method is used to develop the perturbative formalism. We define suitable propagators and vertices and give the diagrammatics and the Feynman rules.
Supersymmetric anyon model coupled to the electromagnetic field
We construct a supersymmetric gauge model describing the electromagnetic interaction of anyons. This is done by means of the supersymmetric generalization of the U(1) X U(1) gauge theory. The model contains the statistical U(1) gauge field endowed with a Chern-Simons mass term and the electromagnetic field, both with the corresponding superpartners, coupled to matter fields. This constrained system is analyzed from the Hamiltonian point of view and the canonical quantization is found. The path-integral method is used to develop the perturbative formalism. We define suitable propagators and vertices and give the diagrammatics and the Feynman rules
Haldane's statistical interactions and universal properties of anyon systems
The exclusion principle of fractional statistics proposed by Haldane is applied to systems with internal degrees of freedom. The symmetry of these systems is included in the statistical interaction matrix which contains the Cartan matrix of Lie algebras. The solutions of the equations for the statistical weights, which coincide with the thermodynamic Bethe ansatz equations are determined in the high temperature limit by the squares of q-deformed dimensions of irreducible representations. The entropy and other thermodynamic properties of anyon systems in this limit are completely characterized by the algebraic structure of symmetry in the universal form. (author). 39 refs
Induced topological terms, hidden local symmetry, and anyon superconductivity
This paper shows how the topological Chern-Simons term in three dimensions and the θ-term, θ bar FF in four dimensions can be dynamically generated due to quantum fluctuations in Nambu-Jona-Lasinio models. These results give a vivid demonstration of hidden local symmetry at work. The fluctuation-induced Chern-Simons term provides a natural way to incorporate fractional statistics and thus a more direct connection with anyon superconductivity. Possible phenomenological implications of this approach in particle physics are also discussed
Designer non-Abelian anyon platforms: from Majorana to Fibonacci
Alicea, Jason; Stern, Ady
2015-12-01
The emergence of non-Abelian anyons from large collections of interacting elementary particles is a conceptually beautiful phenomenon with important ramifications for fault-tolerant quantum computing. Over the last few decades the field has evolved from a highly theoretical subject to an active experimental area, particularly following proposals for trapping non-Abelian anyons in ‘engineered’ structures built from well-understood components. In this short overview we briefly tour the impressive progress that has taken place in the quest for the simplest type of non-Abelian anyon—defects binding Majorana zero modes—and then turn to similar strategies for pursuing more exotic excitations. Specifically, we describe how interfacing simple quantum Hall systems with conventional superconductors yields ‘parafermionic’ generalizations of Majorana modes and even Fibonacci anyons—the latter enabling fully fault tolerant universal quantum computation. We structure our treatment in a manner that unifies these topics in a coherent way. The ideas synthesized here spotlight largely uncharted experimental territory in the field of quantum Hall physics that appears ripe for discovery.
We present a semiclassical theory of charged interacting anyons in a strong magnetic field. We derive the appropriate generalization of the WKB quantization conditions and determine the corresponding wave functions for non separable integrable anyonic systems. This theory is applies to a system of two interacting anyons, two interacting anyons in the presence of an impurity and three interacting anyons. We calculate the dependence of the semiclassical energy levels on the statistical parameter and find regions in which dependence follows very different patterns. The semiclassical treatment allows to find the correlation between these patterns and the change in the character of the classical motion of the system. We also test the accuracy of the mean field approximation for low and high energy states of the three anyons. (author)
Extended Weyl-Heisenberg algebra and Rubakov-Spiridonov superalgebra: Anyonic realizations
We give the realizations of the extended Weyl-Heisenberg (WH) algebra and the Rubakov-Spiridonov (RS) superalgebra in terms of anyons, characterized by the statistical parameter ν is an element of [0,1], on two-dimensional lattice. The construction uses anyons defined from usual fermionic oscillators (Lerda-Sciuto construction). The anyonic realization of the superalgebra sl(1/1) is also presented. (author)
Anyons in (1 + 1) dimensions and the deformed Calogero-Sutherland model
Atai, Farrokh
2011-01-01
This thesis deals with a conformal field theoretical treatment of abelian anyons in (1 + 1)-dimensions and their relation to the integrable Calogero-Sutherland models. We generalize previous work relating anyons to the Calogero-Sutherland model by showing that the correlation function of the anyon field operators corresponds to the eigenfunctions of the deformed Calogero-Sutherland model. Our results suggest a physical application of the deformed Calogero-Sutherland model in the context of th...
Assembling Fibonacci anyons from a Z3 parafermion lattice model
Stoudenmire, E. M.; Clarke, David J.; Mong, Roger S. K.; Alicea, Jason
2015-06-01
Recent concrete proposals suggest it is possible to engineer a two-dimensional bulk phase supporting non-Abelian Fibonacci anyons out of Abelian fractional quantum Hall systems. The low-energy degrees of freedom of such setups can be modeled as Z3 parafermions "hopping" on a two-dimensional lattice. We use the density matrix renormalization group to study a model of this type interpolating between the decoupled-chain, triangular-lattice, and square-lattice limits. The results show clear evidence of the Fibonacci phase over a wide region of the phase diagram, most notably including the isotropic triangular-lattice point. We also study the broader phase diagram of this model and show that elsewhere it supports an Abelian state with semionic excitations.
Equation of state of an anyon gas in a strong magnetic field
The statistical mechanics of an anyon gas in a magnetic field is addressed. An harmonic regulator is used to define a proper thermodynamic limit. When the magnetic field is sufficiently strong, only exact N-anyon groundstates, where anyons occupy the lowest Landau level, contribute to the equation of state. Particular attention is paid to the interval of definition of the statistical parameter α is contained in [-1,0] where a gap exists. One finds that at the critical filling ν=-1/α where the pressure diverges, the external magnetic field is entirely screened by the flux tubes carried by the anyons. (authors). 13 refs
Well-Posedness of the Cauchy Problem for a Space-Dependent Anyon Boltzmann Equation
Arkeryd, Leif; Nouri, Anne
2015-01-01
A fully non-linear kinetic Boltzmann equation for anyons is studied in a periodic 1d setting with large initial data. Strong L 1 solutions are obtained for the Cauchy problem. The main results concern global existence, uniqueness and stabililty. We use the Bony functional, the two-dimensional velocity frame specific for anyons, and an initial layer analysis that moves the solution away from a critical value. 1 Anyons and the Boltzmann equation. Let us first recall the definition of anyon. Con...
Documenting Reproduction and Inequality: Revisiting Jean Anyon's "Social Class and School Knowledge"
Luke, Allan
2010-01-01
Jean Anyon's (1981) "Social Class and School Knowledge" was a landmark work in North American educational research. It provided a richly detailed qualitative description of differential, social class-based constructions of knowledge and epistemological stance. This essay situates Anyon's work in two parallel traditions of critical educational…
Fibonacci anyons from Abelian bilayer quantum Hall states.
Vaezi, Abolhassan; Barkeshli, Maissam
2014-12-01
The possibility of realizing non-Abelian statistics and utilizing it for topological quantum computation (TQC) has generated widespread interest. However, the non-Abelian statistics that can be realized in most accessible proposals is not powerful enough for universal TQC. In this Letter, we consider a simple bilayer fractional quantum Hall system with the 1/3 Laughlin state in each layer. We show that interlayer tunneling can drive a transition to an exotic non-Abelian state that contains the famous "Fibonacci" anyon, whose non-Abelian statistics is powerful enough for universal TQC. Our analysis rests on startling agreements from a variety of distinct methods, including thin torus limits, effective field theories, and coupled wire constructions. We provide evidence that the transition can be continuous, at which point the charge gap remains open while the neutral gap closes. This raises the question of whether these exotic phases may have already been realized at ν=2/3 in bilayers, as past experiments may not have definitively ruled them out. PMID:25526149
Effective models of doped quantum ladders of non-Abelian anyons
Soni, Medha; Troyer, Matthias; Poilblanc, Didier
2016-01-01
Quantum spin models have been studied extensively in one and higher dimensions. Furthermore, these systems have been doped with holes to study t -J models of SU (2 ) spin-1/2. Their anyonic counterparts can be built from non-Abelian anyons, such as Fibonacci anyons described by SU (2) 3 theories, which are quantum deformations of the SU (2 ) algebra. Inspired by the physics of SU (2 ) spins, several works have explored ladders of Fibonacci anyons and also one-dimensional (1D) t -J models. Here, we aim to explore the combined effects of extended dimensionality and doping by studying ladders composed of coupled chains of interacting itinerant Fibonacci anyons. We show analytically that in the limit of strong rung couplings these models can be mapped onto effective 1D models. These effective models can either be gapped models of hole pairs, or gapless models described by t -J (or modified t -J -V ) chains of Fibonacci anyons, whose spectrum exhibits a fractionalization into charge and anyon degrees of freedom. The charge degrees of freedom are described by the hardcore boson spectra while the anyon sector is given by a chain of localized interacting anyons. By using exact diagonalizations for two-leg and three-leg ladders, we show that indeed the doped ladders show exactly the same behavior as that of t -J chains. In the strong ferromagnetic rung limit, we can obtain a new model that hosts two different kinds of Fibonacci particles, which we denote as the heavy τ 's and light τ 's. These two particle types carry the same (non-Abelian) topological charge but different (Abelian) electric charges. Once again, we map the two-dimensional ladder onto an effective chain carrying these heavy and light τ 's. We perform a finite size scaling analysis to show the appearance of gapless modes for certain anyon densities, whereas a topological gapped phase is suggested for another density regime.
Exact solution of the $D_3$ non-Abelian anyon chain
Braylovskaya, Natalia; Frahm, Holger
2016-01-01
Commuting transfer matrices for linear chains of interacting non-Abelian anyons from the two-dimensional irreducible representation of the dihedral group $D_3$ (or, equivalently, the integer sector of the $su(2)_4$ spin-$1$ chain) are constructed using the spin-anyon correspondence to a $D_3$-symmetric formulation of the XXZ Heisenberg spin chain. The spectral problem is solved using discrete inversion identities satisfied by these transfer matrices and functional Bethe ansatz methods. The resulting spectrum can be related to that of the XXZ spin-$1/2$ Heisenberg chain with boundary conditions depending on the topological sector of the anyon chain. The properties of this model in the critical regime are studied by finite size analysis of the spectrum. In particular, points in the phase diagram where the anyon chain realizes some of the rational $\\mathbb{Z}_2$ orbifold theories are identified.
Skin Cancer Can Strike Anyone | NIH MedlinePlus the Magazine
... of this page please turn Javascript on. Feature: Skin Cancer Skin Cancer Can Strike Anyone Past Issues / Summer 2013 Table ... removed. That is the most common form of skin cancer and not as dangerous as melanoma. Photo: Corbis ...
Skin Cancer Can Strike Anyone | NIH MedlinePlus the Magazine
... of this page please turn Javascript on. Feature: Skin Cancer Skin Cancer Can Strike Anyone Past Issues / Summer 2013 ... removed. That is the most common form of skin cancer and not as dangerous as melanoma. Photo: ...
Anyonic statistics and large horizon diffeomorphisms for Loop Quantum Gravity Black Holes
Pithis, Andreas G A
2014-01-01
In this article we investigate the role played by large diffeomorphisms of quantum Isolated Horizons for the statistics of LQG Black Holes by means of their relation to the braid group. To this aim the symmetries of Chern-Simons theory are recapitulated with particular regard to the aforementioned type of diffeomorphisms. For the punctured spherical horizon, these are elements of the mapping class group of $S^2$, which is almost isomorphic to a corresponding braid group on this particular manifold. The mutual exchange of quantum entities in $2$-dimensions is communicated by the braid group, rendering the statistics anyonic. With this we argue that the quantum Isolated Horizon model of LQG based on $SU(2)_k$-Chern-Simons theory exhibits non-abelian anyonic statistics. In this way a connection to theory behind the fractional quantum Hall effect and that of topological quantum computation is established, where non-abelian anyons play a significant role.
Integrable anyon chains: From fusion rules to face models to effective field theories
Finch, Peter E.; Flohr, Michael; Frahm, Holger
2014-12-15
Starting from the fusion rules for the algebra SO(5){sub 2} we construct one-dimensional lattice models of interacting anyons with commuting transfer matrices of ‘interactions round the face’ (IRF) type. The conserved topological charges of the anyon chain are recovered from the transfer matrices in the limit of large spectral parameter. The properties of the models in the thermodynamic limit and the low energy excitations are studied using Bethe ansatz methods. Two of the anyon models are critical at zero temperature. From the analysis of the finite size spectrum we find that they are effectively described by rational conformal field theories invariant under extensions of the Virasoro algebra, namely WB{sub 2} and WD{sub 5}, respectively. The latter contains primaries with half and quarter spin. The modular partition function and fusion rules are derived and found to be consistent with the results for the lattice model.
Integrable anyon chains: From fusion rules to face models to effective field theories
Finch, Peter E.; Flohr, Michael; Frahm, Holger
2014-12-01
Starting from the fusion rules for the algebra SO (5)2 we construct one-dimensional lattice models of interacting anyons with commuting transfer matrices of 'interactions round the face' (IRF) type. The conserved topological charges of the anyon chain are recovered from the transfer matrices in the limit of large spectral parameter. The properties of the models in the thermodynamic limit and the low energy excitations are studied using Bethe ansatz methods. Two of the anyon models are critical at zero temperature. From the analysis of the finite size spectrum we find that they are effectively described by rational conformal field theories invariant under extensions of the Virasoro algebra, namely WB2 and WD5, respectively. The latter contains primaries with half and quarter spin. The modular partition function and fusion rules are derived and found to be consistent with the results for the lattice model.
The thermal and electrical transport properties of an ideal anyon gas within fractional exclusion statistics are studied. By solving the Boltzmann equation with the relaxation-time approximation, the analytical expressions for the thermal and electrical conductivities of a three-dimensional ideal anyon gas are given. The low-temperature expressions for the two conductivities are obtained by using the Sommerfeld expansion. It is found that the Wiedemann—Franz law should be modified by the higher-order temperature terms, which depend on the statistical parameter g for a charged anyon gas. Neglecting the higher-order terms of temperature, the Wiedemann—Franz law is respected, which gives the Lorenz number. The Lorenz number is a function of the statistical parameter g. (condensed matter: electronic structure, electrical, magnetic, and optical properties)
Unified approach to topological quantum computation with anyons: From qubit encoding to Toffoli gate
Xu Haitan; Taylor, J. M. [Joint Quantum Institute and the National Institute of Standards and Technology, College Park, Maryland 20742 (United States)
2011-07-15
Topological quantum computation may provide a robust approach for encoding and manipulating information utilizing the topological properties of anyonic quasiparticle excitations. We develop an efficient means to map between dense and sparse representations of quantum information (qubits) and a simple construction of multiqubit gates, for all anyon models from Chern-Simons-Witten SU(2){sub k} theory that support universal quantum computation by braiding (k{>=}3, k{ne}4). In the process, we show how the constructions of topological quantum memory and gates for k=2,4 connect naturally to those for k{>=}3, k{ne}4, unifying these concepts in a simple framework. Furthermore, we illustrate potential extensions of these ideas to other anyon models outside of Chern-Simons-Witten field theory.
Anyons and Chern-Simons theory on compact spaces of finite genus
We study the coupling of an Abelian Chern-Simons field to fermions in space-times of the form RxM2, where M2 is a compact Riemannian manifold. Upon integrating out the non-zero modes of the Chern-Simons field, an effective N-particle Hamiltonian is constructed, which involves a term representing the effects of the zero modes. We also study the transformation to the fractional statistics (anyon) basis. It is shown that unlike the case of the flat Euclidean M2 the anyon wave equation involves some residual metric dependent interactions, and the wave function is multivalued. (author). 7 refs
Access Without Authentication: How and Why We Let Anyone Surf Our Wireless
Watkins, Donna
2006-01-01
Wireless hotspots are popping up in local coffee shops everywhere. Anyone with a wireless-ready laptop or PDA can surf the Internet at one of these hotspots. The same is now true for all 32 branches of the Orange County Public Library (OCPL) in California. Though many public library systems are moving toward wireless access, most require patrons…
2010-07-01
... information must we give to anyone who flies on our Government aircraft? 301-70.909 Section 301-70.909 Public... give to anyone who flies on our Government aircraft? You must give each person aboard your aircraft a copy of the following disclosure statement: DISCLOSURE FOR PERSONS FLYING ABOARD FEDERAL...
Bożejko, M.; Lytvynov, E. W.; Rodionova, I. V.
2015-10-01
Let ν be a finite measure on R whose Laplace transform is analytic in a neighbourhood of zero. An anyon Lévy white noise on ( R^d,dx) is a certain family of noncommuting operators on the anyon Fock space over L^2( R^d× R,dx\\otimesν), where \\varphi=\\varphi(x) runs over a space of test functions on R^d, while ω=ω(x) is interpreted as an operator-valued distribution on R^d. Let L^2(τ) be the noncommutative L^2-space generated by the algebra of polynomials in the variables , where τ is the vacuum expectation state. Noncommutative orthogonal polynomials in L^2(τ) of the form are constructed, where f(n) is a test function on ( R^d)^n, and are then used to derive a unitary isomorphism U between L^2(τ) and an extended anyon Fock space \\mathbf F(L^2( R^d,dx)) over L^2( R^d,dx). The usual anyon Fock space \\mathscr F(L^2( R^d,dx)) over L^2( R^d,dx) is a subspace of \\mathbf F(L^2( R^d,dx)). Furthermore, the equality \\mathbf F(L^2( R^d,dx))=\\mathscr F(L^2( R^d,dx)) holds if and only if the measure ν is concentrated at a single point, that is, in the Gaussian or Poisson case. With use of the unitary isomorphism U, the operators are realized as a Jacobi (that is, tridiagonal) field in \\mathbf F(L^2( R^d,dx)). A Meixner-type class of anyon Lévy white noise is derived for which the corresponding Jacobi field in \\mathbf F(L^2( R^d,dx)) has a relatively simple structure. Each anyon Lévy white noise of Meixner type is characterized by two parameters, λ\\in R and η≥slant0. In conclusion, the representation ω(x)=\\partial_x^\\dag +λ \\partial_x^\\dag\\partialx +η\\partial_x^\\dag\\partial_x\\partial_x+\\partial_x is obtained, where \\partial_x and \\partial_x^\\dag are the annihilation and creation operators at the point x. Bibliography: 57 titles.
Hodgson, Ted R.; Burke, Maurice J.
2005-01-01
This article describes the variety of strategies that can be used to determine the probability that a player wins a tennis game, given a probability of 60 percent that he or she wins each point. The article suggests strategies for using the problem in 9-12 classrooms.
Reys, Robert; Reys, Rustin
2011-01-01
In their dual roles as mathematics teachers and tennis coaches, the authors have worked with tennis players who have never thought about how a knowledge of mathematics might help them become "better" tennis players. They have also worked with many mathematics students who have never considered how much mathematics is associated with tennis. This…
Jaunel, Agathe
2011-01-01
Entrepreneurs are a major actor in the economy, they risk money and time to reach different goals and results. Not anyone can be an entrepreneur, they have special personality characteristics, in general they are different than other people. Entrepreneurs are willing to take risks, to work hard, to lead, they are innovative and stand for their ideas and beliefs. There are different reasons to start a company such as earning more money, capitalize on an idea, make a living from a passion, conc...
Topological Quantum Computation with the universal R matrix for Ising anyons
Georgiev, Lachezar S
2008-01-01
We show that the braid-group extension of the monodromy-based topological quantum computation scheme of Das Sarma et al. can be understood in terms of the universal R matrix for the Ising model giving similar results to those obtained by direct analytic continuation of multi-anyon Pfaffian wave functions. It is necessary, however, to take into account the projection on spinor states with definite total parity which is responsible for the topological entanglement in the Pfaffian topological quantum computer.
The D(D3)-anyon chain: integrable boundary conditions and excitation spectra
Finch, Peter E.; Frahm, Holger
2013-05-01
Chains of interacting non-Abelian anyons with local interactions invariant under the action of the Drinfeld double of the dihedral group D3 are constructed. Formulated as a spin chain the Hamiltonians are generated from commuting transfer matrices of an integrable vertex model for periodic and braided as well as open boundaries. A different anyonic model with the same local Hamiltonian is obtained within the fusion path formulation. This model is shown to be related to an integrable fusion interaction round the face model. Bulk and surface properties of the anyon chain are computed from the Bethe equations for the spin chain. The low-energy effective theories and operator content of the models (in both the spin chain and fusion path formulation) are identified from analytical and numerical studies of the finite-size spectra. For all boundary conditions considered the continuum theory is found to be a product of two conformal field theories. Depending on the coupling constants the factors can be a Z4 parafermion or a {M}_{(5,6)} minimal model.
Majorana anyons, non-Abelian statistics and quantum computation in Chern–Simons–Higgs theory
We naturally obtain the NOT and CNOT logic gates, which are key pieces of quantum computing algorithms, in the framework of the non-Abelian Chern–Simons–Higgs theory in two spatial dimensions. For that, we consider the anyonic quantum vortex topological excitations and show that Majorana anyons, namely, self-adjoint combinations of these vortices and anti-vortices, have in general non-Abelian statistics. The associated unitary monodromy braiding matrices become the required logic gates in the special case when the vortex spin is s = 1/4, which corresponds to the case of Ising non-Abelian anyons, found in different quantum computing systems. We explicitly construct the vortex field operators, show that they carry both magnetic flux and charge and obtain their Euclidean correlation functions by using the method of quantization of topological excitations, which is based on the order-disorder duality. These correlators are in general multivalued, the number of sheets being determined by the vortex spin. This, by its turn, is proportional to the vacuum expectation value of the Higgs field and therefore can be tuned by both the free parameters of the Higgs potential and the temperature. (paper)
Topological phases and self-correcting memories in interacting anyon systems
Wootton, James R.
2013-12-01
Recent studies have shown that topological models with interacting anyonic quasiparticles can be used as self-correcting quantum memories. Here we study the behavior of these models at thermal equilibrium. It is found that the interactions allow topological order to exist at finite temperature, not only in an extension of the ground-state phase, but also in a novel form of topologically ordered phase. Both phases are found to support self-correction in all models considered, and the transition between them corresponds to a change in the scaling of memory lifetime with system size.
Engineering interactions and anyon statistics by multicolor lattice-depth modulations
Cardarelli, Lorenzo; Greschner, Sebastian; Santos, Luis
2016-08-01
We show that a multicolor modulation of the depth of an optical lattice allows for a flexible independent control of correlated hopping, occupation-dependent gauge fields, effective on-site interactions without Feshbach resonances, and nearest-neighbor interactions. As a result, the lattice-depth modulation opens the possibility of engineering with minimal experimental complexity a broad class of lattice models in current experiments with ultracold atoms, including Hubbard models with correlated hopping, peculiar extended models, and two-component anyon-Hubbard models.
The Free Encyclopaedia that Anyone can Edit: The Shifting Values of Wikipedia Editors
Kim Osman
2014-06-01
Full Text Available Wikipedia is often held up as an example of the potential of the internet to foster open, free and non-commercial collaboration. However such discourses often conflate these values without recognising how they play out in reality in a peer-production community. As Wikipedia is evolving, it is an ideal time to examine these discourses and the tensions that exist between its initial ideals and the reality of commercial activity in the encyclopaedia. Through an analysis of three failed proposals to ban paid advocacy editing in the English language Wikipedia, this paper highlights the shift in values from the early editorial community that forked encyclopaedic content over the threat of commercialisation, to one that today values the freedom that allows anyone to edit the encyclopaedia.
Hartree-Fock ground-state energy of anyons with no Coulomb interaction in the zero effective field
Sitko, P.
1994-01-01
We find, in the Hartree-Fock approximation, the ground-state energy of anyons with no Coulomb interaction in the case when the external magnetic field precisely cancels the average statistical field. From the point of view of the fractional quantum Hall effect statistics transmutations to {\\it superfermions} at filling fractions $\
Hartree-Fock ground-state energy of anyons with no Coulomb interaction in the zero effective field
Sitko, Piotr
1994-05-01
We find, in the Hartree-Fock approximation, the ground-state energy of anyons with no Coulomb interaction in the case when the external magnetic field precisely cancels the average statistical field. From the point of view of the fractional quantum Hall effect it is shown that statistics transmutations to superfermions at filling fractions v = {1}/{2 p} are not energetically favourable.
Creating and manipulating non-Abelian anyons in cold atom systems using auxiliary bosons
Zhang, Yuhe; Sreejith, G. J.; Jain, J. K.
2015-08-01
The possibility of realizing bosonic fractional quantum Hall effect in ultracold atomic systems suggests a new route to producing and manipulating anyons, by introducing auxiliary bosons of a different species that capture quasiholes and thus inherit their nontrivial braiding properties. States with localized quasiholes at any desired locations can be obtained by annihilating the auxiliary bosons at those locations. We explore how this method can be used to generate non-Abelian quasiholes of the Moore-Read Pfaffian state for bosons at filling factor ν =1 . We show that a Hamiltonian with an appropriate three-body interaction can produce two-quasihole states in two distinct fusion channels of the topological "qubit." Characteristics of these states that are related to the non-Abelian nature can be probed and verified by a measurement of the effective relative angular momentum of the auxiliary bosons, which is directly related to their pair distribution function. Moore-Read states of more than two quasiholes can also be produced in a similar fashion. We investigate some issues related to the experimental feasibility of this approach, in particular, how large the systems should be for a realization of this physics and to what extent this physics carries over to systems with the more standard two-body contact interaction.
We consider a AN-1 type of spin-dependent Calogero-Sutherland model, containing an arbitrary representation of the permutation operators on the combined internal space of all particles, and find that such a model can be solved as easily as its standard su(M) invariant counterpart through the diagonalisation of Dunkl operators. A class of novel representations of the permutation operator Pij, which pick up non-trivial phase factors along with interchanging the spins of the ith and jth particles, are subsequently constructed. These 'anyon-like' representations interestingly lead to different variants of the spin Calogero-Sutherland model with highly non-local interactions. We also explicitly derive some exact eigenfunctions as well as energy eigenvalues of these models and observe that the related degeneracy factors crucially depend on the choice of a few discrete parameters which characterise such anyon-like representations. (orig.)
Hartree-Fock ground-state energy of anyons with no Coulomb interaction in the zero effective field
Sitko, P. (Inst. of Physics, Technical Univ. of Wroclaw (Poland))
1994-05-16
We find, in the Hartree-Fock approximation, the ground-state energy of anyons with no Coulomb interaction in the case when the external magnetic field precisely cancels the average statistical field. From the point of view of the fractional quantum Hall effect it is shown that statistics transmutations to superfermions at filling fractions [nu]=1/2p are not energetically favourable. (orig.)
Shech, Elay
2015-09-01
This paper looks at the nature of idealizations and representational structures appealed to in the context of the fractional quantum Hall effect, specifically, with respect to the emergence of anyons and fractional statistics. Drawing on an analogy with the Aharonov-Bohm effect, it is suggested that the standard approach to the effects—(what we may call) the topological approach to fractional statistics—relies essentially on problematic idealizations that need to be revised in order for the theory to be explanatory. An alternative geometric approach is outlined and endorsed. Roles for idealizations in science, as well as consequences for the debate revolving around so-called essential idealizations, are discussed.
Paolucci, Michael
2015-08-01
We have built a social interface and funding model based on collaborative consumption to empower public access to powerful telescopes.Slooh’s robotic observatories put anyone with a desire to look up and wonder in the driver’s seat of powerful mountaintop telescopes. Our members have taken millions of images of over 50,000 objects in the night sky, from tracking asteroids for NASA to discovering supernovae. Slooh launched December 25th, 2003 from our flagship observatory at the Institute of Astrophysics of the Canary Islands and in the ensuing decade we’ve built a network of 20+ observatory partners around the world to capture every magical moment in outer space. We are the world’s largest community of people peering into space together.About SloohSlooh makes astronomy incredibly easy, engaging and affordable for anyone with a desire to see outer space for themselves. Since 2003 Slooh has connected telescopes to the Internet for access by the broader public. Slooh’s automated observatories develop celestial images in real-time for broadcast to the Internet. Slooh’s technology is protected by Patent No.: US 7,194,146 B2 which was awarded in 2006. Slooh members have taken over 3m photos/150,000 FITS of over 50,000 celestial objects, participated in numerous discoveries with leading astronomical institutions and made over 2,000 submissions to the Minor Planet Center. Slooh’s flagship observatories are situated on Mt. Teide, in partnership with the Institute of Astrophysics of the Canary Islands (IAC), and in Chile, in partnership with the Catholic University. Slooh has also broadcast live celestial events from partner observatories in Arizona, Japan, Hawaii, Cypress, Dubai, South Africa, Australia, New Zealand and Norway. Slooh’s free live broadcasts of potentially hazardous asteroids (PHAs), comets, transits, eclipses, solar activity etc. feature narration by astronomy experts Will Gater, Bob Berman, Paul Cox and Eric Edelman and are syndicated to
The deregulated electric power industry in the United States is undergoing a radical change in marketing emphasis more familiar to consumers of branded products such as soft drinks. In attempts to woo customers from other companies, utilities are beginning to market a ''company image'' offering lower prices, better products (i.e. other household services such as telephone and cable television) and improved provision levels of customer services. The price of the product, in this case electric power, has been shown to be much more likely to persuade a consumer to shift supplier than any existing level of customer satisfaction. (UK)
Electromagnetic interaction of anyons
A U(1) gauge theory of a particle with arbitrary spin in three spacetime dimensions is introduced. All the spin dependent effects are a consequence of a Chern-Simons field which is coupled to a conserved current with a piece involving the U(1) gauge field. In the case of a spin-1/2 particle one reproduces all the results of the spinning particle in the presence of an electromagnetic field. (orig.)
Inspiration, anyone? (Editorial
Lindsay Glynn
2006-09-01
Full Text Available I have to admit that writing an editorial for this issue was a struggle. Trying to sit down and write when the sun was shining outside and most of my colleagues were on vacation was, to say the least, difficult. Add to that research projects and conferences…let’s just say that I found myself less than inspired. A pitiful plea for ideas to a colleague resulted in the reintroduction to a few recent evidence based papers and resources which inspired further searching and reading. Though I generally find myself surrounded (more like buried in research papers and EBLIP literature, somehow I had missed the great strides that have been made of late in the world of evidence based library and information practice. I realize now that I am inspired by the researchers, authors and innovators who are putting EBLIP on the proverbial map. My biggest beef with library literature in general has been the plethora of articles highlighting what we should be doing. Take a close look at the evidence based practitioners in the information professions: these are some of the people who are actively practicing what has been preached for the past few years. Take, for example, the about‐to‐be released Libraries using Evidence Toolkit by Northern Sydney Central Coast Health and The University of Newcastle, Australia (see their announcement in this issue. An impressive advisory group is responsible for maintaining the currency and relevancy of the site as well as promoting the site and acting as a steering committee for related projects. This group is certainly doing more than “talking the talk”: they took their experience at the 3rd International Evidence Based Librarianship Conference and did something with the information they obtained by implementing solutions that worked in their environment. The result? The creation of a collection of tools for all of us to use. This toolkit is just what EBLIP needs: a portal to resources aimed at supporting the information specialists who want to adopt the evidence based model of practice. I have already got it bookmarked and set up an RSS feed. Even before the official toolkit launch, a wealth of information is available on the website including presentations, project and events information, and a blog containing site updates. There has been much discussion on increasing the knowledge base from which to draw evidence for library and information practitioners. Original research needs to be published so that we can use it as evidence to support our decision making. The literature is lacking the significant numbers of publication types widely considered to be the highest level of evidence: systematic reviews, meta‐analyses and randomized controlled trials. This issue of Evidence Based Library and Information Practice proudly boasts both a systematic review/meta‐analysis and a randomized controlled trial. Denise Koufogiannakis and Natasha Wiebe, in their systematic review/meta‐analysis, provide evidence that shows that computer assisted instruction is as effective as traditional instruction for students at an introductory, undergraduate level. Nicola Pearce‐Smith compared the effectiveness of self‐directed, web‐based learning with a classroom‐based, interactive workshop in her randomized controlled trial. I am looking forward to reading and utilizing more and more of these in the future. Another example is even closer to home. I recently attended a strategic planning meeting at my institution where new services and procedures were discussed. Unlike the past, when new initiatives were implemented and later evaluated, all librarians instinctively indicated that the literature should be searched first to see if there was any evidence either for or against changing or adding new services or procedures. The evidence based model of practice is catching on. I know that there are numerous examples of information practitioners taking a proactive role in putting research into practice, and many research papers that are worth mentioning. To highlight them all would be a task much too grand for an editorial. Kudos to all of you, and thanks for the inspiration.
Supiano, Beckie
2008-01-01
In a sputtering economy, and with demographic changes ahead, the model of ever-increasing price and merit-based student aid cannot be sustained. But what new system might rise in its place? One option is returning to a system in which the government bears more of the cost of higher education--something that might be possible, if still unlikely, in…
Nuclear power - anyone interested
The subject is discussed under the following headings, with illustrative strip cartoons: uranium mining (uranium exploration in Orkney); radiation (hazards); nuclear power and employment; transport (of radioactive materials); nuclear reactor safety (reference to the accident to Three Mile Island-2 reactor); energy in the future; sources of energy; nuclear weapons; suggestions for action; insulation and heating buildings; nuclear security; working in a nuclear power station; nuclear waste; the anti-nuclear movement; nuclear power and politics. (U.K.)
de Mestre, Neville
2004-01-01
Tennis is a sport in which the mathematics involves an unusual scoring system together with other applications pertinent to the draw for different types of tournaments and the relative ratios of points won and lost. The name of the sport is thought to have originated from the French word "tenez", which translates roughly as "to receive (the…
ALI; ALIZADEH
2007-01-01
Like many other ancient cultures,China possesses an impressive and celebrated literary heritage. The master poets of the medieval Tang Dynasty(618-907), for example, are rightfully known as some of the world’s best lyric poets; the adventures of the Monkey King and his company—as told in the classical Chinese narrative Journey to the West—have achieved a global following (in part due to TV adaptations and the like); and novels, short story collections and memoirs by expat Chinese authors living in the West have won major literary prizes and become international bestsellers.
Popcorn Anyone? Grazing the Future.
Magee, Clare
1994-01-01
Discusses social trends outlined in the Popcorn Report (Faith Popcorn) that affect outdoor education, including constant political, cultural, and personal change and the many life roles people maintain. Most important to outdoor education are the trends of increased consumer awareness, concern with physical health and overall wellness, and the…
Thermal states of anyonic systems
Iblisdir, S., E-mail: iblisdir@ecm.ub.e [Dpt. Estructura i Constituents de la Materia, Universitat Barcelona, 08028 Barcelona (Spain); Perez-Garcia, D. [Dpt. Analisis Matematico, Universitad Complutense de Madrid, 28040 Madrid (Spain); Aguado, M. [Max Planck Institut fuer Quantenoptik, Garching D-85748 (Germany); Pachos, J. [School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT (United Kingdom)
2010-04-21
A study of the thermal properties of two-dimensional topological lattice models is presented. This work is relevant to assess the usefulness of these systems as a quantum memory. For our purposes, we use the topological mutual information I{sub topo} as a 'topological order parameter'. For Abelian models, we show how I{sub topo} depends on the thermal topological charge probability distribution. More generally, we present a conjecture that I{sub topo} can (asymptotically) be written as a Kullback-Leitner distance between this probability distribution and that induced by the quantum dimensions of the model at hand. We also explain why I{sub topo} is more suitable for our purposes than the more familiar entanglement entropy S{sub topo}. A scaling law, encoding the interplay of volume and temperature effects, as well as different limit procedures, are derived in detail. A non-Abelian model is next analyzed and similar results are found. Finally, we also consider, in the case of a one-plaquette toric code, an environment model giving rise to a simulation of thermal effects in time.
Holt, Fabian; MacKinney-Valentin, Maria
2015-01-01
literature on the intensification of media communications in the early 21st century and how it involves deeper transformations — mediatizations — of many areas in business and society. There are already extensive literatures on the mediatization of finance, politics, food, and religion, for instance, but how...... design creativity. The article is a conceptual paper that begins by situating the evolution of amateur design in theories of media and modernity to offer a contemporary theorization of amateur design and to establish an analytical perspective from which core aspects of the changing amateur/industry...
Trestles anyone? a thermographic nightmare
Grossman, Jon L.
2007-04-01
Railroads are close to capacity and there is only so much that can be squeezed through a pipe. The result is insufficient equipment, longer trains, tighter schedules and of course the stretching of personnel. Now, imagine that as one of these freight trains, comprising among other things, chemical tankers and boxcars containing a variety of different materials (including hazardous materials) while crossing a river has the trestle collapse underneath it. Hundreds of thousands of pounds of steel, wood and of course the hazardous chemicals fall into the river, pollute the land and the river, and shut down a port. Farfetched? This paper will reveal the results of a unique thermographic inspection, the findings, the results and the protocols.
Do I Tell Anyone I Have Cancer?
... continue to provide patient support and education and fund research to improve outcomes for all blood cancer patients. Give Now Previous Article Tips for Talking with Your Employer and Your Workplace Rights Next Article Talking with ...
Mathematical Literacy Teachers: Can Anyone Be One?
Botha, Hanlie; Maree, Jacobus; Stols, Gerrit
2014-01-01
In this case study, Mathematical Literacy teachers were interviewed and observed in the classroom in order to provide insight into the way this subject, relatively new in South African schools, is handled. The focus of this research was the instructional practice of these teachers specifically in terms of their mathematical knowledge regarding the…
Anyons in three dimensions with geometric algebra
Soiguine, Alexander
2016-01-01
Even though it has been almost a century since quantum mechanics planted roots, the field has its share of unresolved problems. It could be the result of a wrong mathematical structure providing inadequate understanding of the quantum phenomena.
SOFTWARE PIRACY DOES NOT HURT ANYONE?
DANISH JAMIL,
2011-04-01
Full Text Available The software piracy has been common nowadays. Many people all over the world seem to involve and used it which thought that it does not that big deal. However, these software companies have been suffered and lose a vast amount of money from illegally distributing their software. This paper will present the background of the software piracy, then this paper will lead to the issues from both side; the people who use software piracy and the software company, and also the social implication.
A U(1) gauge theory for anyons
A U(1) gauge theory of a particle with arbitrary spin in three space-time dimensions is introduced. All the spin-dependent effects are a consequence of a direct coupling of the gauge field to the Chern-Simons field responsible for the shift in spin and statistics. Two approaches in relativistic quantum mechanics which take a spin-0 or a spin-1/2 state as starting point are shown to be equivalent and the result is that the total spin dependence reduces to a magnetic coupling with a gyromagnetic ratio g=2 for any spin. (orig.)
Field operators for anyons and plektons
Given its superselection sectors with non-abelian braid group statistics, we extend the algebra A of local observables into an algebra F containing localized intertwiner fields which carry the superselection charges. The construction of the inner degrees of freedom, as well as the study of their transformation properties (quantum symmetry), are entirely in terms of the superselection structure of the observables. As a novel and characteristic feature for braid group statistics, Clebsch-Gordan and commutation 'coefficients' generically take values in the algebra M of symmetry operators, much as it is the case with quasi-Hopf symmetry. A, F, and M are all C* algebras, i.e. represented by bounded operators on a Hilbert space with positive metric. (orig.)
Atlas of knowledge anyone can map
Börner, Katy
2015-01-01
Maps of physical spaces locate us in the world and help us navigate unfamiliar routes. Maps of topical spaces help us visualize the extent and structure of our collective knowledge; they reveal bursts of activity, pathways of ideas, and borders that beg to be crossed. This book, from the author of Atlas of Science, describes the power of topical maps, providing readers with principles for visualizing knowledge and offering as examples forty large-scale and more than 100 small-scale full-color maps. Today, data literacy is becoming as important as language literacy. Well-designed visualizations can rescue us from a sea of data, helping us to make sense of information, connect ideas, and make better decisions in real time. In Atlas of Knowledge, leading visualization expert Katy Borner makes the case for a systems science approach to science and technology studies and explains different types and levels of analysis. Drawing on fifteen years of teaching and tool development, she introduces a theoretical framewor...
SOFTWARE PIRACY DOES NOT HURT ANYONE?
DANISH JAMIL,; HASSAN ZAKI
2011-01-01
The software piracy has been common nowadays. Many people all over the world seem to involve and used it which thought that it does not that big deal. However, these software companies have been suffered and lose a vast amount of money from illegally distributing their software. This paper will present the background of the software piracy, then this paper will lead to the issues from both side; the people who use software piracy and the software company, and also the social implication.
Anyone here a doctor who speaks nurse?
Gould, Mark
2008-06-26
Patient safety errors are often caused by the NHS being a "Tower of Babel", with many "languages" spoken. Staff "tribes" often focus on their own agendas, rather than on the patients' health. The National Patient Safety Campaign is aiming to make the topic a priority of staff, patients and carers. PMID:18637221
Gravois, John
2007-01-01
In psychological terms, impostor syndrome is a cognitive distortion that prevents a person from internalizing any sense of accomplishment. By many accounts, academics--graduate students, junior professors, and even some full professors--relate to this only a little less than they relate to eye strain. The condition was first identified in 1978 by…
Anyonic states in Chern-Simons theory
We discuss the canonical quantization of Chern-Simons theory in 2+1 dimensions, minimally coupled to a Dirac spinor field, first in the temporal gauge and then in the Coulomb gauge. In our temporal gauge formulation, Gauss's law and the gauge condition A0=0 are implemented by embedding the formulation in an appropriate physical subspace. We construct a Fock space of charged particle states that satisfy Gauss's law, and show that they obey fermion, not fractional statistics. The gauge-invariant spinor field that creates these charged states from the vacuum obeys the anticommutation rules that generally apply to spinor fields. The Hamiltonian, when described in the representation in which the charged fermions are the propagating particle excitations that obey Gauss's law, contains an interaction between charge and transverse current densities. We observe that the implementation of Gauss's law and the gauge condition does not require us to use fields with graded commutator algebras or particle excitations with fractional statistics. In our Coulomb gauge formulation, we implement Gauss's law and the gauge condition ∂lAl=0 by the Dirac-Bergmann procedure. In this formulation, the constrained gauge fields become functionals of the spinor fields, and are not independent degrees of freedom. The formulation in the Coulomb gauge confirms the results we obtained in the temporal gauge: The ''Dirac-Bergmann'' anticommutation rule for the charged spinor fiels ψ and ψdegree that have both been constrained to obey Gauss's law is precisely identical to the canonical spinor anticommutation rule that generates standard fermion statistics. And we also show that the Hamiltonians for charged particle states in our temporal and Coulomb gauge formulations are identical, once Gauss's law has been implemented in both cases
Dengiz, Suat; Kilicarslan, Ercan; Tekin, Bayram
2013-01-01
We compute the tree-level scattering amplitude between two covariantly conserved sources in generic Cosmological Topologically Massive Gravity augmented with a Fierz-Pauli term that has three massive degrees of freedom. We consider the Chiral Gravity limit in the anti-de Sitter space as well as the limit of Flat-Space Chiral Gravity. We show that Chiral Gravity cannot be unitarily deformed with a Fierz-Pauli mass. We calculate the non-relativistic potential energy between two point-like spinn...
Making Waves: With Podcasting, Anyone (Yes, Anyone) Can Create Their Own Radio Show
Richardson, Will
2006-01-01
Podcasting is just one of a suite of new tools that are taking the Internet and its users to new heights. Podcasting involves the creation of digital audio files and the distribution of those files in a way that makes it easy for visitors to listen to them wherever and whenever it is convenient. In schools, podcasts have been quick to take root.…
Integrability in three dimensions: Algebraic Bethe ansatz for anyonic models
Khachatryan, Sh.; Ferraz, A.; Klümper, A.; Sedrakyan, A.
2015-10-01
We extend basic properties of two dimensional integrable models within the Algebraic Bethe Ansatz approach to 2 + 1 dimensions and formulate the sufficient conditions for the commutativity of transfer matrices of different spectral parameters, in analogy with Yang-Baxter or tetrahedron equations. The basic ingredient of our models is the R-matrix, which describes the scattering of a pair of particles over another pair of particles, the quark-anti-quark (meson) scattering on another quark-anti-quark state. We show that the Kitaev model belongs to this class of models and its R-matrix fulfills well-defined equations for integrability.
Nutritional supplements and the EU: is anyone happy?
Eberhardie, Christine
2007-11-01
In 2000 an estimated pound sterling 335 x 106 was spent on food supplements and herbal remedies in the UK. Until recently, The Trades Description Act 1968, the Food Safety Act 1990 and The Food Labelling Regulations 1996 (amended 2004) were the only form of regulation available to protect the public. The medical community has been concerned about the risk to patients of inaccurate dosages and poor-quality products as well as drug-nutrient and nutrient-nutrient interactions. Following growing concern about the type and quality of food supplements and herbal remedies available in the EU, the European Commission has published directives regulating food supplements (2002/46/EC) and herbal remedies (2004/24/EC and 2004/27/EC) available within the EU. The directives came into force in 2005 and limit the number and quality of permitted food supplements through the creation of a 'positive list' of approved supplements. In the present paper the new regulatory frameworks and the implications for the food supplement manufacturers, traditional and complementary therapists, the healthcare professions and patients will be examined. It would appear that there is considerable dissatisfaction with the regulations in their present form. Several questions remain: is regulation the answer; who decides which nutrients go on the positive list; what effect has the regulation had on patient safety and patient choice? PMID:17961271
News from the Library: newspapers anyone? Try PressDisplay!
CERN Library
2011-01-01
PressDisplay is an online portal where you can browse and read online articles from more than 1,900 newspapers from 95 countries, as soon as they are published. With Pressdisplay, the time when newspapers were nicely displayed on wooden rods in libraries has passed... Le Monde, International Herald Tribune and many more titles are displayed in their original layout including text and images, and you can print and e-mail the articles you are interested in. You even have the possibility to create rss feeds, so that the news reaches you directly. The CERN Library has now activated a trial version of PressDisplay valid till 31 December; it is open to everyone at CERN. This trial doesn't offer the possibility to create personalised alerts based on specific search criteria. In case you need such features - or if you have any comments or questions - please contact us.
Shot Noise in Anyonic Mach-Zehnder Interferometer
Feldman, D. E.; Gefen, Yuval; Kitaev, Alexei; Law, K. T.; Stern, Ady
2006-01-01
We show how shot noise in an electronic Mach-Zehnder interferometer in the fractional quantum Hall regime probes the charge and statistics of quantum Hall quasiparticles. The dependence of the noise on the magnetic flux through the interferometer allows for a simple way to distinguish Abelian from non-Abelian quasiparticle statistics. In the Abelian case, the Fano factor (in units of the electron charge) is always lower than unity. In the non-Abelian case, the maximal Fano factor as a functio...
Shot noise in an anyonic Mach-Zehnder interferometer
Feldman, D. E.; Gefen, Yuval; Kitaev, Alexei; Law, K. T.; Stern, Ady
2007-01-01
We show how shot noise in an electronic Mach-Zehnder interferometer in the fractional quantum Hall regime probes the charge and statistics of quantum Hall quasiparticles. The dependence of the noise on the magnetic flux through the interferometer allows for a simple way to distinguish Abelian from non-Abelian quasiparticle statistics. In the Abelian case, the Fano factor (in units of the electron charge) is always lower than unity. In the non-Abelian case, the maximal Fano factor as a functio...
What exactly is Universal Grammar, and has anyone seen it?
Dąbrowska, Ewa
2015-01-01
Universal Grammar (UG) is a suspect concept. There is little agreement on what exactly is in it; and the empirical evidence for it is very weak. This paper critically examines a variety of arguments that have been put forward as evidence for UG, focussing on the three most powerful ones: universality (all human languages share a number of properties), convergence (all language learners converge on the same grammar in spite of the fact that they are exposed to different input), and poverty of the stimulus (children know things about language which they could not have learned from the input available to them). I argue that these arguments are based on premises which are either false or unsubstantiated. Languages differ from each other in profound ways, and there are very few true universals, so the fundamental crosslinguistic fact that needs explaining is diversity, not universality. A number of recent studies have demonstrated the existence of considerable differences in adult native speakers' knowledge of the grammar of their language, including aspects of inflectional morphology, passives, quantifiers, and a variety of more complex constructions, so learners do not in fact converge on the same grammar. Finally, the poverty of the stimulus argument presupposes that children acquire linguistic representations of the kind postulated by generative grammarians; constructionist grammars such as those proposed by Tomasello, Goldberg and others can be learned from the input. We are the only species that has language, so there must be something unique about humans that makes language learning possible. The extent of crosslinguistic diversity and the considerable individual differences in the rate, style and outcome of acquisition suggest that it is more promising to think in terms of a language-making capacity, i.e., a set of domain-general abilities, rather than an innate body of knowledge about the structural properties of the target system. PMID:26157406
Solutions of the hexagon equation for abelian anyons
Galindo, César; Torres, Nicolás Jaramillo
2016-01-01
Comment: This paper is written for the Proceedings of the conference "Encuentro Colombiano de Computacion Cuantica" held in Bogota in May 2015. 17 pages. To appear in Revista Colombiana de Matematicas
What exactly is Universal Grammar, and has anyone seen it?
Ewa eDabrowska
2015-06-01
Full Text Available Universal Grammar (UG is a suspect concept. There is little agreement on what exactly is in it; and the empirical evidence for it is very weak. This paper critically examines a variety of arguments that have been put forward as evidence for UG, focussing on the three most powerful ones: universality (all human languages share a number of properties, convergence (all language learners converge on the same grammar in spite of the fact that they are exposed to different input, and poverty of the stimulus (children know things about language which they could not have learned from the input available to them. I argue that these arguments are based on premises which are either false or unsubstantiated. Languages differ from each other in profound ways, and there are very few true universals, so the fundamental crosslinguistic fact that needs explaining is diversity, not universality. A number of recent studies have demonstrated the existence of considerable differences in adult native speakers’ knowledge of the grammar of their language, including aspects of inflectional morphology, passives, quantifiers, and a variety of more complex constructions, so learners do not in fact converge on the same grammar. Finally, the poverty of the stimulus argument presupposes that children acquire linguistic representations of the kind postulated by generative grammarians; constructionist grammars such as those proposed by Tomasello, Goldberg and others can be learned from the input. We are the only species that has language, so there must be something unique about humans that makes language learning possible. The extent of crosslinguistic diversity and the considerable individual differences in the rate, style and outcome of acquisition suggest that it is more promising to think in terms of a language-making capacity, i.e. a set of domain-general abilities, rather than an innate body of knowledge about the structural properties of the target system.
Who's Driving Wages in Finland? Or Is Anyone?
Tyrväinen, Timo
1996-01-01
This study examines wage paths in the Finnish manufacturing using the Johansen method in estimations. The empirical results have the following implications. i) Wage-wage links in the Finnish manufacturing industry have been tight. In a longer perspective, wages in the high-pay branches and low-pay branches have followed a common path. ii) An important characteristic of wage development in high-pay branches has been the tendency to counteract any attempts to improve the relative position of th...
Integrability in three dimensions: Algebraic Bethe ansatz for anyonic models
Sh. Khachatryan
2015-10-01
Full Text Available We extend basic properties of two dimensional integrable models within the Algebraic Bethe Ansatz approach to 2+1 dimensions and formulate the sufficient conditions for the commutativity of transfer matrices of different spectral parameters, in analogy with Yang–Baxter or tetrahedron equations. The basic ingredient of our models is the R-matrix, which describes the scattering of a pair of particles over another pair of particles, the quark-anti-quark (meson scattering on another quark-anti-quark state. We show that the Kitaev model belongs to this class of models and its R-matrix fulfills well-defined equations for integrability.
Talking back, but is anyone listening? Journalism and comment fields
Graham, T.S.; Broersma, M.J.; Peters, C.J.
2012-01-01
Over the past decade, particularly with the introduction of Web 2.0 technologies, we have seen an increase in the popularity of social media such as forums, weblogs and wikis and social media applications and services such as Facebook and YouTube along with the proliferation of open publishing initi
Teaching from a Distance: "Hello, Is Anyone Out There?"
Mottet, Timothy P.
This small, qualitative study examined how interactive television educators go about teaching in electronically-mediated environments where students remain separated from them. Three interactive television instructors were interviewed, and 15 hours of field observation was conducted. Although the study's original goal was to yield prescriptions…
Differential regularization of a non-relativistic anyon model
Differential regularization is applied to a field theory of a non-relativistic charged boson field φ with λ(φ*φ)2 self-interaction and coupling to a statistics-changing 0(1) Chern-Simons gauge field. Renormalized configuration-space amplitudes for all diagrams contributing to the φ*φ*φφ 4-point function, which is the only primitively divergent Green's function, are obtained up to 3-loop order. The renormalization group equations are explicitly checked, and the scheme dependence of the β-function is investigated. If the renormalization scheme is fixed to agree with a previous 1-loop calculation, the 2- and 3-loop contributions to β(λ, e) vanish, and β(λ, ε) itself vanishes when the ''self-dual'' condition relating λ to the gauge coupling e is imposed. (author). 12 refs, 1 fig
For Sale: Nuclear Waste Sites--Anyone Buying?
Hancock, Don
1992-01-01
Explores why the United States Nuclear Waste Program has been unable to find a volunteer state to host either a nuclear waste repository or monitored retrieval storage facility. Discusses the Department of Energy's plans for Nevada's Yucca Mountain as a repository and state and tribal responses to the plan. (21 references) (MCO)
Authenticity Anyone? The Enhancement of Emotions via Neuro-Psychopharmacology
Kraemer, Felicitas
2010-01-01
This article will examine how the notion of emotional authenticity is intertwined with the notions of naturalness and artificiality in the context of the recent debates about ‘neuro-enhancement’ and ‘neuro-psychopharmacology.’ In the philosophy of mind, the concept of authenticity plays a key role in the discussion of the emotions. There is a widely held intuition that an artificial means will always lead to an inauthentic result. This article, however, proposes that artificial substances do ...
A Higher-Spin Chern-Simons Theory of Anyons
Boulanger, Nicolas; Valenzuela, Mauricio
2013-01-01
We propose Chern-Simons models of fractional-spin fields interacting with ordinary tensorial higher-spin fields and internal color gauge fields. For integer and half-integer values of the fractional spins, the model reduces to finite sets of fields modulo infinite-dimensional ideals. We present the model on-shell using Fock-space representations of the underlying deformed-oscillator algebra.
Is anyone regulating naturally occurring radioactive material? A state survey
As far as we know, naturally occurring radioactive material (NORM) has surrounded humankind since the beginning of time. However, recent data demonstrating that certain activities concentrate NORM have increased concern regarding its proper handling and disposal and precipitated the development of new NORM-related regulations. The regulation of NORM affects the management of government facilities as well as a broad range of industrial processes. Recognizing that NORM regulation at the federal level is extremely limited, Argonne National Laboratory (ANL) conducted a 50-state survey to determine the extent to which states have assumed the responsibility for regulating NORM as well as the NORM standards that are currently being applied at the state level. Though the survey indicates that NORM regulation comprises a broad spectrum of controls from full licensing requirements to virtually no regulation at afl, a trend is emerging toward recognition of the need for increased regulation of potential NORM hazards, particularly in the absence of federal standards
Is anyone immune to the social media echo chamber?
Hendricks, Vincent Fella
2014-01-01
It’s becoming increasingly obvious that as we spend more time communicating via social media, we are disappearing into bubbles. We receive information from the same sources and witness the views of the same people in our personalised newsfeeds every day. But it also seems like living in our bubble...... is having an effect on our own opinions and how we formulate them....
蒋红
2014-01-01
泛在学习是指任何人可在任何时间、任何地方学习，可以通过一定的方式和渠道获取任何所需学习内容，并以任何方式开展学习。在联合国教科文组织等的推动下，学习型社会建设在世界各国普遍开展，泛在学习发展迅速，成为全民终身学习的重要形式。根据上海建设“人人皆学、时时能学、处处可学”学习型城市的要求，上海开放大学正在全力打造一所“新型大学”，即既是开放远程教育大学实体，又是全体市民终身学习的服务平台。目前，学校正积极扩大教育服务群体、促进资源开放共享、优化学习网络环境、强化教育质量保证、完善学习支持服务和推进学习成果认证与转换，为促进上海市民泛在学习作出不懈努力。随着经济社会和现代信息技术的发展，泛在学习日益呈现需求多样化、方式个性化、时间碎片化以及场所无形化等特点。为此，上海开放大学将努力促进工作场所学习和生活场所学习，实现知识学习和实践应用的良好结合，把大学办在社会之中，包括：努力汇聚高校、企业和政府等各方面的优质学习资源，让全体市民共享；开展基于大数据技术的学习行为分析研究，促进学习模式的创新；继续发挥远程与开放学习姊妹大学网络的作用；促进教育技术新成果和优质资源共享；增进在远程开放教育领域的国际交流与合作；推动数字化学习的发展。%Ubiquitous learning refers to a learning style in which anyone can learn anytime and anywhere, have a certain access to whatever learning resources he needs, and use them in any way. In the promotion of UNESCO and other international organizations, the construction of a learning society has been carried out all over the world, and u-biquitous learning has developed rapidly as being an important form of lifelong learning. According to the
Communicating with first year students; so many channels but is anyone listening? A Practice Report
Jason Lodge
2010-07-01
Full Text Available Communicating with first year students has become a far more complex prospect in the digital age. There is a lot of competition for limited attentional resources from media sources in almost endless channels. Getting important messages to students when there is so much competing information is a difficult prospect for academic and professional divisions of the university alike. Students’ preferences for these communication channels are not well understood and are constantly changing with the introduction of new technology. A first year group was surveyed about their use and preference for various sources of information. Students were generally positive about the use of social networking and other new online media but strongly preferred more established channels for official academic and administrative information. A discussion of the findings and recommendations follows.
Non-Abelian {SU}{(3)}_{k} anyons: inversion identities for higher rank face models
Frahm, Holger; Karaiskos, Nikos
2015-12-01
The spectral problem for an integrable system of particles satisfying the fusion rules of {SU}{(3)}k is expressed in terms of exact inversion identities satisfied by the commuting transfer matrices of the integrable fused {A}2(1) interaction round a face model of Jimbo, Miwa and Okado. The identities are proven using local properties of the Boltzmann weights, in particular the Yang-Baxter equation and unitarity. They are closely related to the consistency conditions for the construction of eigenvalues obtained in the separation of variables approach to integrable vertex models.
Look, Mom, I'm a Boy--Don't Tell Anyone I Was a Girl"
Ehrensaft, Diane
2013-01-01
Interventions with a school-aged youth are presented to demonstrate a child's gender transition from female to male with the support of a single mother, grandmother, therapist, pediatric endocrinologist, gender education and advocacy group, and gender-affirming school. This single case study illustrates both the positive psychological effects of…
It's Better Being an Economist (But Don't Tell Anyone).
Freeman, Richard B.
1999-01-01
This paper contrasts the job market in economics with the job market in physics and mathematics, which attract students who are, by conventional measures, smarter than economists and where the base of knowledge is better established than ours. Despite this, economists earn more and have better career prospects than physicists or mathematicians. The paper offers several reasons for our better economic prospects, ranging from lack of glamour attracting bright young people to the dismal science ...
Does Anyone Read the Fine Print? Consumer Attention to Standard-Form Contracts
Yannis Bakos; Florencia Marotta-Wurgler; David R. Trossen
2014-01-01
A cornerstone of the law and economics approach to standard-form contracts is the informed-minority hypothesis: in competitive markets, a minority of term-conscious buyers is sufficient to discipline sellers from using unfavorable boilerplate terms. This argument is often invoked to limit intervention or regulate consumer transactions, but there has been little empirical investigation of its validity. We track the Internet browsing behavior of 48,154 monthly visitors to the Web sites of 90 on...
Communicating with first year students; so many channels but is anyone listening? A Practice Report
Jason Lodge
2010-01-01
Communicating with first year students has become a far more complex prospect in the digital age. There is a lot of competition for limited attentional resources from media sources in almost endless channels. Getting important messages to students when there is so much competing information is a difficult prospect for academic and professional divisions of the university alike. Students’ preferences for these communication channels are not well understood and are constantly changing wit...
Will anyone rmember us? Thoughts on information loss caused by progress
Townsend, Peter
2010-10-01
speed, fibre optic communication or cost per CCD pixel often follow a smooth logarithmic improvement per year. This seems desirable, but progress is frequently only achievable by introduction of new software, different types of storage media or new operating conditions. Consequently technologies become outdated. For transient information this is unimportant, but for long term storage and archiving of information, images, photographs etc, there is an inevitable loss of earlier records. This is not a new phenomenon as even information on stone or clay tablets has decayed or been lost, either by physical decay of storage materials or loss of understanding because of changing language and cultural nuances. Examples emphasise how technological progress has speeded up information decay and loss. Since logarithmic "laws" have been proposed to describe the trends for electronic improvements, one may consider if equivalent trends apply to information loss. It appears that one may propose that the product of three factors is roughly constant. These are the time needed to write the new information; the quantity of information stored, and the average survival time of the information before the storage medium has decayed or is obsolete. The reality of such a "law" is that, whereas we may currently have records and photographs from many earlier generations, our rapidly stored electronic data may be lost within a few years, and certainly will have vanished in a readable form for the next generation.
[DSM-5: a diagnosis and a drug should not be denied to anyone].
Nonino, Francesco; Magrini, Nicola
2014-02-01
In May 2013 the American Psychiatric Association approved the 5th revised edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM), that since 1958 has been a reference document for the classification of psychiatric conditions. Even before its publication the DSM-5 has raised a controversy widely covered by media, the strongest argument of its critics being the fact that DSM-5 favors the medicalization of conditions that belong to ordinary human experiences. Using DSM-5 as a diagnostic tool in clinical practice may favor over-diagnosis and over-treatment, for example by labeling many healthy people experiencing forgetfulness as affected by "cognitive impairment", while grieving after the death of a loved one may be diagnosed as a "major depressive disorder". Moreover, the scientific integrity of the committee that produced the DSM-5 has been questioned, arguing that the tendency to expand the boundaries of mental illness may have been driven by financial and intellectual conflicts of interest and by ties with drug companies of some of its members. PMID:24625908
Bould, M. Dylan; Hladkowicz, Emily S; Pigford, Ashlee-Ann E; Ufholz, Lee-Anne; Postonogova, Tatyana; Shin, Eunkyung; Boet, Sylvain
2014-01-01
Objectives To examine indexed health science journals to evaluate the prevalence of Wikipedia citations, identify the journals that publish articles with Wikipedia citations, and determine how Wikipedia is being cited. Design Bibliometric analysis. Study selection Publications in the English language that included citations to Wikipedia were retrieved using the online databases Scopus and Web of Science. Data sources To identify health science journals, results were refined using Ulrich’s dat...
Poese, Matthew E.; Smith, Robert W. M.; Garrett, Steven L.
2005-09-01
This talk will compare electrodynamically driven thermoacoustic refrigeration technology to some common implementations of low-lift vapor-compression technology. A rudimentary explanation of vapor-compression refrigeration will be presented along with some of the implementation problems faced by refrigeration engineers using compressor-based systems. These problems include oil management, compressor slugging, refrigerant leaks and the environmental impact of refrigerants. Recently, the method of evaluating this environmental impact has been codified to include the direct effects of the refrigerants on global warming as well as the so-called ``indirect'' warming impact of the carbon dioxide released during the generation (at the power plant) of the electrical power consumed by the refrigeration equipment. It is issues like these that generate commercial interest in an alternative refrigeration technology. However, the requirements of a candidate technology for adoption in a mature and risk-averse commercial refrigeration industry are as hard to divine as they are to meet. Also mentioned will be the state of other alternative refrigeration technologies like free-piston Stirling, thermoelectric and magnetocaloric as well as progress using vapor compression technology with alternative refrigerants like hydrocarbons and carbon dioxide.
Windle, Joel
2010-01-01
This article investigates how reality television talent-quest formats model the normative neoliberal worker and learner--roles which are increasingly drawn together. In the age of "life-long learning" and shifting employment demands, new models of the supple, adaptable and willing learner are increasingly important both to meeting neoliberal…
Magnetic-field-tuned Aharonov-Bohm oscillations and evidence for non-Abelian anyons at ν = 5/2.
Willett, R L; Nayak, C; Shtengel, K; Pfeiffer, L N; West, K W
2013-11-01
We show that the resistance of the ν = 5/2 quantum Hall state, confined to an interferometer, oscillates with the magnetic field consistent with an Ising-type non-Abelian state. In three quantum Hall interferometers of different sizes, resistance oscillations at ν = 7/3 and integer filling factors have the magnetic field period expected if the number of quasiparticles contained within the interferometer changes so as to keep the area and the total charge within the interferometer constant. Under these conditions, an Abelian state such as the (3, 3, 1) state would show oscillations with the same period as at an integer quantum Hall state. However, in an Ising-type non-Abelian state there would be a rapid oscillation associated with the "even-odd effect" and a slower one associated with the accumulated Abelian phase due to both the Aharonov-Bohm effect and the Abelian part of the quasiparticle braiding statistics. Our measurements at ν = 5/2 are consistent with the latter. PMID:24237543
Does anyone need help? Age and gender effects on children's ability to recognize need-of-help.
Stolarova, Margarita; Brielmann, Aenne A
2014-01-01
The exploratory study presented here examines children's ability to recognize another person's need-of-help. This social perception process necessarily precedes the decision to actively help others. Fifty-eight children aged between 5 and 13 completed three experimental paradigms. They were asked to look at black-and-white drawings and to indicate which ones showed somebody in need of help. A control task requiring children to differentiate between pictures of humans and birds measured general categorization abilities. This experimental design enabled us to consider confounding effects of children's developmental status and motivation and to distinguish them from specific need-of-help recognition abilities. As gender and age have been shown to influence social perception as well as helping behavior, we explored whether these factors also have an impact on need-of-help recognition. Children's response accuracies and response times (RTs) were analyzed. We observed clearly higher accuracy rates for younger girls compared to younger boys specifically in the need-of-help recognition tasks. For boys, an age-related performance improvement was found. Younger girls performed at a similarly high level as older girls and boys. No gender differences were observed for children aged over nine. This report provides first evidence that the developmental trajectory of children's ability to recognize another person's need-of-help differs for girls and boys. PMID:24578698
Does anyone need help? Age and gender effects on children’s ability to recognize need-of-help
Margarita eStolarova
2014-02-01
Full Text Available The exploratory study presented here examines children’s ability to recognize another person’s need-of-help. This social perception process necessarily precedes the decision to actively help others. Fifty-eight children aged between five and 13 completed three experimental paradigms. They were asked to look at black-and-white drawings and to indicate which ones showed somebody in need of help. A control task requiring children to differentiate between pictures of humans and birds measured general categorization abilities. This experimental design enabled us to consider confounding effects of children’s developmental status and motivation and to distinguish them from specific need-of-help recognition abilities. As gender and age have been shown to influence social perception as well as helping behavior, we explored whether these factors also have an impact on need-of-help recognition. Children’s response accuracies and response times were analyzed. We observed clearly higher accuracy rates for younger girls compared to younger boys specifically in the need-of-help recognition tasks. For boys, an age-related performance improvement was found. Younger girls performed at a similarly high level as older girls and boys. No gender differences were observed for children aged over nine. This report provides first evidence that the developmental trajectory of children’s ability to recognize another person’s need-of-help differs for girls and boys.
40 CFR 144.83 - Do I need to notify anyone about my Class V injection well?
2010-07-01
... (prior to construction of your well) . . . then you must contact your State UIC Program to determine what...) . . . then you must contact your State UIC Program to determine what you must submit and by when. . . . then... information you must submit: (i) No matter what type of Class V well you own or operate, you must submit...
Russo, Carlo; Perito, Maria Angela; Di Fonzo, Antonella
2011-01-01
Large retail chains have spent considerable resources to promote production protocols and traceability across the supply chain, aiming at increasing food safety. Yet, the majority of consumers are unaware of these private food safety standards (PFSS) and retailers are not informing them. This behavior denotes a pooling paradox: supermarkets spend a large amount of money for food safety and yet they forget to inform consumers. The result is a pooling equilibrium where consumers cannot discrimi...
Sólveig Maria Seibitz 1993
2015-01-01
This thesis is about Icelandic managers doing business with China. China has a huge market potential and many Icelandic firms have started having an interest in operating in China. However, the Chinese market is vastly different from the Icelandic one, and therefore the goal of this thesis was to understand how Icelandic managers approach doing business with China and how it has changed their firm’s strategy. In order to answer this question, this thesis focused on a theoretical part and a...
Everything you wanted to know about radiation and health (but couldn't find anyone to ask)
This publication aims to explain in non-technical language, what is and is not known about radiation and health and aims to clarify some of the key issues for the non-specialist reader, including dose limits, risk assessments from a variety of sources of radiation, and for different age groups, and from occupational exposures. There is a discussion of what took place at Chernobyl, Windscale/Sellafield, Chelyabinsk and Three Mile Island, and the lessons Chernobyl has now. (UK)
Liu, Zhao; Vaezi, Abolhassan; Lee, Kyungmin; Kim, Eun-Ah
2015-08-01
Recent theoretical insights into the possibility of non-Abelian phases in ν =2 /3 fractional quantum Hall states revived the interest in the numerical phase diagram of the problem. We investigate the effect of various kinds of two-body interlayer couplings on the (330) bilayer state and exactly solve the Hamiltonian for up to 14 electrons on sphere and torus geometries. We consider interlayer tunneling, short-ranged repulsive/attractive pseudopotential interactions, and Coulomb repulsion. We find a 6-fold ground-state degeneracy on the torus when the interlayer hollow-core interaction is dominant. To identify the topological nature of this phase we measure the orbital-cut entanglement spectrum, quasihole counting, topological entanglement entropy, and wave-function overlap. Comparing the numerical results to the theoretical predictions, we interpret this 6-fold ground-state degeneracy phase to be the non-Abelian bilayer Fibonacci state.
Does anyone need help? : age and gender effects on children's ability to recognize need-of-help
Stolarova, Margarita; Aenne A. Brielmann
2014-01-01
The exploratory study presented here examines children's ability to recognize another person's need-of-help. This social perception process necessarily precedes the decision to actively help others. Fifty-eight children aged between 5 and 13 completed three experimental paradigms. They were asked to look at black-and-white drawings and to indicate which ones showed somebody in need of help. A control task requiring children to differentiate between pictures of humans and birds measured genera...
Dominey-Howes, D.; Goff, J. R.
2009-12-01
National economies are increasingly dependent on the global telecommunications system - and in particular, its submarine cable infrastructure. Submarine cable traffic represents about 30% of global GDP so the cost of losing, or even simply slowing, communications traffic is high. Many natural hazards are capable of damaging and destroying this infrastructure but tsunamis are the most significant threat, particularly in waters >1000 m deep. Submarine cables and their shore-based infrastructure (the anchor points), are at risk from direct and indirect tsunami-related effects. During the 2004 Indian Ocean Tsunami in India and Indonesia, cables were broken (direct effect) as the tsunami eroded supporting sediments, and were further damaged by floating/submerged objects and intense nearshore currents. Shore-based infrastructure was also directly damaged in India, Indonesia, and the Maldives. The 1929 Grand Banks earthquake generated a submarine landslide and tsunami off Newfoundland which broke 12 submarine telegraph cables. In 2006, an earthquake in Taiwan generated submarine landslides and a tsunami. These landslides caused one of the largest disruptions of modern telecommunications history when nine cables in the Strait of Luzon were broken disabling vital connections between SE Asia and the rest of the world. Although electronic traffic in and out of Australia was slowed, it did not cease because >70% of our traffic is routed via cables that pass through Hawaii. This is extremely significant because Hawaii is an internationally recognised bottleneck or “choke point” in the global telecommunications network. The fact that Hawaii is a choke point is important because it is regularly affected by numerous large magnitude natural hazards. Any damage to the submarine telecommunications infrastructure routed through Hawaii could result in significant impacts on the electronic flow of data and voice traffic, negatively affecting dependent economies such as Australia. Other choke points exist globally, many in high hazards regions. We propose that proper risk assessments be undertaken at all bottlenecks in the global telecommunications system affected by natural hazards (such as tsunami). We use Hawaii as an example of the sort of research that should be undertaken.
Starr, Lisa J.
2010-01-01
In this paper I discuss the tension created by religion and science in one student's understanding of knowledge and truth by exploring two questions: "How do individuals accommodate their religious beliefs with their understanding of science?" and "How does religious knowledge interact with scientific knowledge to construct meaning?" A…
Low, Eric; Bountra, Chas; Lee, Wen Hwa
2016-01-01
We are experiencing a new era enabled by unencumbered access to high quality data through the emergence of open science initiatives in the historically challenging area of early stage drug discovery. At the same time, many patient-centric organisations are taking matters into their own hands by participating in, enabling and funding research. Here we present the rationale behind the innovative partnership between the Structural Genomics Consortium (SGC)-an open, pre-competitive pre-clinical research consortium and the research-focused patient organisation Myeloma UK to create a new, comprehensive platform to accelerate the discovery and development of new treatments for multiple myeloma. PMID:27594912
Elias, T.; Sutton, A. J.; Tam, E.; Businger, S.; Horton, K. A.; Ley, D.; Petrie, L.
2014-12-01
As Kīlauea Volcano approaches its 33rd year of nearly continuous activity, simultaneous summit and rift eruptions continue to challenge island populations, agriculture, and infrastructure with elevated levels of acidic gases and particles. In 2008, the opening of a new summit vent attended a ten- to one hundred- fold increase in SO2 summit emissions which, combined with the ongoing east rift emissions, resulted in the highest combined annual SO2 release since regular measurements began in 1979. While the overall emissions have decreased in a step-wise manner since 2008, this large local source still contributes 20-60% of the SO2 emitted by all stationary fuel combustion sources in the U.S., and ~ 7-20% of the estimated time-averaged annual global volcanogenic SO2 contribution. Research on the long-term health and environmental effects of chronic exposure to volcanic pollution is ongoing in Hawai'i. Public health statistics suggest that incidences of respiratory emergency increased coincident with the onset of the summit eruption. From 2008-2011, Hawaii County received a Disaster Designation by the U.S. Secretary of Agriculture due to agricultural losses from the effects of volcanic emissions. A multifaceted approach is being used to address the current gas and particle hazards and to mitigate the impacts to affected areas. Multi-agency websites are providing forecast and real-time data regarding acid particle and SO2 gas concentrations to help people minimize their exposures. The short-term concentration data is linked to color-coded health-advisory levels developed by the U.S. Environmental Protection Agency and the Hawaii State Department of Health, with input from the National Park Service and the U.S. Geological Survey. Questions remain, however, on the appropriateness of the designated advisory levels for protecting chronically exposed populations, and if these tools are sufficiently useful to Hawai'i residents and visitors. Other mitigation efforts include community-based health interventions, indoor engineering controls, and innovations and relief programs within the agricultural sector.
Evans, Melanie
2008-02-25
The crisis in auction-rate securities is coming down hard on tax-exempt providers. Buyers are disappearing, sending interest rates soaring. Some hospitals and other healthcare borrowers are being forced to pay maximum interest. "Basically, the investor pool has all but vanished," says Melissa Williams, left, of Christus Health. PMID:18491765
Chow, A
2002-01-01
(Email: ) In this age of global changes, Ann Chow has an international education to prepare her for any challenge ahead. Having studied in Japan, Taiwan, Vietnam, and Italy in her early years, she received her undergraduate degree in Language and Literature from the National Cheng Chi University (Taipei, Taiwan) and completed her Master of Science degree in Applied Management from Lesley College (Cambridge, Massachusetts). Ann's business and managerial experiences are as ...
Trinkner, Rick; Cohn, Ellen S; Rebellon, Cesar J; Van Gundy, Karen
2012-02-01
Both law and society scholars and developmental psychologists have focused on the legitimacy of authority figures, although in different domains (police versus parents). The purpose of the current research is to bridge these two fields by examining the relations among parenting style (i.e., authoritarian, authoritative, permissive), the perception of parental legitimacy, and changes in delinquency over time. It is hypothesized that parental legitimacy mediates the relation between parenting style and future delinquent behavior. Middle school and high school students completed questionnaires three times over a period of 18 months. Parenting style and delinquent behavior were measured at time 1, parental legitimacy at time 2, and delinquency again at time 3. The results show that authoritative parenting was positively related to parental legitimacy, while authoritarian parenting was negatively associated with parental legitimacy. Furthermore, parental legitimacy was negatively associated with future delinquency. Structural equation modeling indicated that parental legitimacy mediated the relation between parenting styles and changes in delinquency over the 18-month time period. The implications for parenting style and parental legitimacy affecting delinquent behavior are discussed. PMID:21669454
Watts, Krista N
2016-03-01
MDR-TB and admission to isolation can induce a situation in which individuals are normless, unable to achieve the social goals that they have learned to pursue. Described as anomie, this situation can induce deviant behaviour. Addressing the psychosocial ethics of MDR-TB and isolation, this paper responds to the call for consideration of resource allocation and liberty. PMID:26847829
In this paper, we start with the description of the nature of AMU anti-nuclear protest movement, taking into consideration that the nuclear waste management program is an important political issue as it is linked to the problem of public acceptance of nuclear power. According to nuclear experts, AMU might have been appropriately chosen as the site for radioactive waste management, with a multitude of technical criteria, including site ecology, geology and seismic activity, local population density, land use, and proximity of hazardous facilities. However, anti-nuclear protest from the local population and administration has made it extremely difficult to carry out the government plan to find an acceptable site for the back end of the nuclear fuel cycle. Nuclear power is one of the controversial but most valuable sources of energy production in the future. The first nuclear power station which the Korean nationals have ever has is Kori Plant in Youngness County of Kyongnam Province: it began to be constructed in 1970; and since its completion in 1978, has been under full operation. Since the construction of the first station, eight additional plants have been under either operation or construction. Unfortunately, however, a majority of Korean citizens have extremely imitated access to the information currently available and, as a consequence, they tend to treat nuclear power as the object of great fear and threat. Variations prevail with respect to the perception toward nuclear power, depending upon individuals, groups, and nations. Underlying a presentation of this paper are two propositions, which the World Health Organization had pointed out about 30 years ago: the public will need protection from undue anxieties and fears toward nuclear energy; and any nuclear enterprise will itself need protection from the repercussion aroused by these anxieties and fears, which may impede its work on the local, national, and international level
Nyquist, Ewald B.; And Others
Nontraditional methods of qualifying for a college degree are described in this student guide to off-campus study and examination. The three external degree institutions in the United States that offer these programs are discussed. They include: Regents External Degree Program of the University of the State of New York; Thomas A. Edison College of…
Ashwin, Paul William Hamilton
2016-01-01
In this paper, I examine the tensions between the transformational potential undergraduate degrees and ways we have of measuring and comparing the quality of those degrees nationally and internationally. I argue that what makes higher education a higher form of education is the relations that students develop to knowledge through the study of particular bodies of disciplinary and professional knowledge. Given, this I argue that this needs to be central to the ways in which we understand and m...
Trinkner, Rick; Cohn, Ellen S.; Rebellon, Cesar J.; Van Gundy, Karen
2012-01-01
Both law and society scholars and developmental psychologists have focused on the legitimacy of authority figures, although in different domains (police versus parents). The purpose of the current research is to bridge these two fields by examining the relations among parenting style (i.e., authoritarian, authoritative, permissive), the perception…
Bernstein, Allison; Baule, Steve; Farmer, Lesley S. J.; Anderson, Cyndee; Barringer, Crystal; Buchanan, Peggy; Fullner, Sheryl Kindle; Knop, Kathi; Larson, Chris
2002-01-01
Includes eight articles that address issues related to budgeting and finances in secondary school libraries. Topics include limited budgets; budget proposals; administering grants; writing grants; using Microsoft's Excel software for budgeting; using credit cards for library purchases; offering prizes for donating books; and offering coffee and…
48 CFR 3.700 - Scope of subpart.
2010-10-01
... source selection information in exchange for a thing of value or to give anyone a competitive advantage... or giving anyone a competitive advantage in the award of a Federal agency procurement contract....
Engineering complex topological memories from simple Abelian models
Wootton, James R.; Lahtinen, Ville; Doucot, Benoit; Pachos, Jiannis K.
2011-09-01
In three spatial dimensions, particles are limited to either bosonic or fermionic statistics. Two-dimensional systems, on the other hand, can support anyonic quasiparticles exhibiting richer statistical behaviors. An exciting proposal for quantum computation is to employ anyonic statistics to manipulate information. Since such statistical evolutions depend only on topological characteristics, the resulting computation is intrinsically resilient to errors. The so-called non-Abelian anyons are most promising for quantum computation, but their physical realization may prove to be complex. Abelian anyons, however, are easier to understand theoretically and realize experimentally. Here we show that complex topological memories inspired by non-Abelian anyons can be engineered in Abelian models. We explicitly demonstrate the control procedures for the encoding and manipulation of quantum information in specific lattice models that can be implemented in the laboratory. This bridges the gap between requirements for anyonic quantum computation and the potential of state-of-the-art technology.
Brownian motion and the heat equation on superspace and anyspace
We use random walks to study diffusion on anyspace. Anyspace is characterized by co-ordinate ξ with ξN=0 and statistics ξξ'=e2πi/Nξ'ξ between independent copies. Anyonic integration and anyonic Dirac δ-functions are introduced, and reduce to familiar results for supersymmetry when N=2. These ingredients are then used to formulate and solve the resulting anyonic diffusion equation. (oirg.)
Gastroenteritis - norovirus; Colitis - norovirus; Hospital acquired infection - norovirus ... fluids ( dehydration ). Anyone can become infected with norovirus. Hospital patients who are very old, very young, or ...
Collaborative trust evaluation for wiki security
Lindberg, Kasper; Jensen, Christian D.
Wiki systems form a subclass of the more general Open Collaborative Authoring Systems, where content is created and maintained by a user community. The ability of anyone to edit the content is, at the same time, their strength and their weakness. Anyone can write documents that improve the value ...
Engineering complex topological memories from simple Abelian models
In three spatial dimensions, particles are limited to either bosonic or fermionic statistics. Two-dimensional systems, on the other hand, can support anyonic quasiparticles exhibiting richer statistical behaviors. An exciting proposal for quantum computation is to employ anyonic statistics to manipulate information. Since such statistical evolutions depend only on topological characteristics, the resulting computation is intrinsically resilient to errors. The so-called non-Abelian anyons are most promising for quantum computation, but their physical realization may prove to be complex. Abelian anyons, however, are easier to understand theoretically and realize experimentally. Here we show that complex topological memories inspired by non-Abelian anyons can be engineered in Abelian models. We explicitly demonstrate the control procedures for the encoding and manipulation of quantum information in specific lattice models that can be implemented in the laboratory. This bridges the gap between requirements for anyonic quantum computation and the potential of state-of-the-art technology. - Highlights: → A novel quantum memory using Abelian anyons is developed. → This uses an advanced encoding, inspired by non-Abelian anyons. → Errors are suppressed topologically, by means of single spin interactions. → An implementation with current Josephson junction technology is proposed.
Demystifying talent management
Adamsen, Billy
Talent, Dr. Adamsen questions this wisdom and explanation of talent from the Gospel of Matthew – the idea that anyone who has ‘more’ has a talent to - and demonstrates how the term ‘talent’ has become an empty signifier which no longer refers to anyone or anything in the actual world. This makes him...
What "Counts" as Educational Policy? Notes toward a New Paradigm
Anyon, Jean
2005-01-01
In this piece, Jean Anyon argues that the definition of education policy should be expanded to include the consideration of economic policies. She asserts that the impact of economic policies, such as minimum wage laws, have large and often ignored impacts on the experiences of urban students. Anyon argues that even small annual salary…
McFarlane, Bob
2002-01-01
New features in AutoCAD 2002 are covered in this book, making it a useful refresher course for anyone using AutoCAD at this level, and upgrading to the new software release. The material in the book is also relevant to anyone using other recent releases, including, AutoCAD 2000.
Thermodynamics for Fractal Statistics
da Cruz, Wellington
1998-01-01
We consider for an anyon gas its termodynamics properties taking into account the fractal statistics obtained by us recently. This approach describes the anyonic excitations in terms of equivalence classes labeled by fractal parameter or Hausdorff dimension $h$. An exact equation of state is obtained in the high-temperature and low-temperature limits, for gases with a constant density of states.
Self, Situation and Escape from Stigmatized Ethnic Identity.
Berreman, Gerald D.
Anyone familiar with current internal political problems in India cannot remain sanguine about the passivity of her oppressed ethnic minorities, be they defined by caste, religion, or heritage; nor can anyone be, who looks at the long history of religious conversion and reform in India, for every success along these lines in the past 2500 years…
Depression and African Americans
... is a common, yet serious, medical illness. Clinical depression is a “whole-body” illness that affects your mood, thoughts, body and behavior. Without treatment, symptoms can last for weeks, months or years. Appropriate ... Clinical depression can affect anyone: Anyone can experience ...
Identical Particles in Quantum Mechanics: Operational and Topological Considerations
Neori, Klil H
2016-01-01
This dissertation reports our investigation into the existence of anyons, which interpolate between bosons and fermions, in light of the Symmetrization Postulate, which states that only the two extremes exist. The Symmetrization Postulate can be understood as asserting that there are only two consistent ways of combining the behavior of distinguishable particles to obtain the behavior of identical ones. We showed that anyonic behavior then arises because of the way in which the probability amplitudes of distinguishable particles in two dimensions are affected by the topology of the space. These can then be combined in one of the ways arising from the Symmetrization Postulate, to form identical anyons. Therefore, anyons do not invalidate the Symmetrization Postulate, but are entirely compatible with it. In order to show that anyons can arise without particle identity, we investigated how distinguishable particles can gain particular properties from the topology of their configuration space. We managed to do so...
Bringing order through disorder: Localisation of errors in topological quantum memories
Wootton, James R
2011-01-01
The ability to reliably store quantum states is an essential element for any task in quantum information. Topological systems promise to protect quantum information by topological and energetic considerations. If undesired anyonic excitations are propagated at large distances, either through coherent or probabilistic processes, they can cause logical errors in the topologically encoded information. Here we show that Anderson localisation induced by disorder in the system can successfully protect topological quantum memories from the coherent propagation of anyons. For concreteness we employ the toric code model at zero temperature. It is known that in the absence of a magnetic field it can tolerate a finite initial density of anyonic errors. In the presence of a spurious magnetic field anyonic quantum walks are induced and the tolerable density becomes zero. We demonstrate that disorder in the couplings of the model can successfully localise anyons. This allows the topological quantum memory to tolerate a fin...
Road to Recovery from Prostate Cancer
Full Text Available ... exactly what you need. From the circulators, to scrub techs, to the anesthesiologists, that really understand the ... fourth arm would minimize the assistance and your scrub tech or anyone that would be holding the ...
National Oceanic and Atmospheric Administration, Department of Commerce — The Fisheries Statistics Division of the NOAA Fisheries has automated data summary programs that anyone can use to rapidly and easily summarize U.S. commercial...
IPython interactive computing and visualization cookbook
Rossant, Cyrille
2014-01-01
Intended to anyone interested in numerical computing and data science: students, researchers, teachers, engineers, analysts, hobbyists... Basic knowledge of Python/NumPy is recommended. Some skills in mathematics will help you understand the theory behind the computational methods.
2013-04-05
... anonymous). Attachments to electronic comments will be accepted in Microsoft Word, Excel, or Adobe PDF file... imprisonment for anyone who knowingly and willfully (1) falsifies, conceals, or covers up by any trick,...
... Care Animal Welfare Veterinary Careers Public Health 10 "Poison Pills" for Pets Anyone who takes medication prescribed ... of all phone calls to the ASPCA Animal Poison Control Center (APCC) are about human medications. Your ...
Who Should Not Get Vaccinated with These Vaccines?
... be updated.) Top of Page HPV-Cervarix (Human Papillomavirus) vaccine Some people should not get HPV vaccine or ... updated.) Top of Page HPV-Gardasil-9 (Human Papillomavirus) vaccine Some people should not get HPV vaccine. Anyone ...
Primary liposarcoma of the lung in a young woman.
Ruiz-Palomo, F; J. L. Calleja; Fogue, L
1990-01-01
A primary liposarcoma of the lung occurred in an 18 year old girl, the first to be reported in anyone under 40. Though rare, intrathoracic liposarcoma should be included in the differential diagnosis of pleural effusion in younger patients.
Clinical Perspectives: 7-Year-Old Girl Has 6 Organs Removed and Retransplanted
Full Text Available ... address the psychological and family issues that accompany childhood illness. "OR-Live," the vision of improving health. ... the clotting risk is probably greatest in the early period and improves over time. Great. Does anyone ...
Penetration testing protecting networks and systems
Henry, Kevin M
2012-01-01
This book is a preparation guide for the CPTE examination, yet is also a general reference for experienced penetration testers, ethical hackers, auditors, security personnel and anyone else involved in the security of an organization's computer systems.
Road to Recovery from Prostate Cancer
Full Text Available ... the web for anyone to reference in the future. Secondly, we welcome you to email any questions ... for the treatment of prostate cancer is the future. When we wanted to build a program at ...
Road to Recovery from Prostate Cancer
Full Text Available ... be archived on the web for anyone to reference in the future. Secondly, we welcome you to ... to get the da Vinci S or the latest model of the robot, and would that comes the ...
Full Text Available ... notice as we test the pulmonary veins, we should not have capture of the right atrium, so ... say anyone who's a candidate for this procedure should seriously think about having it done. I'm ...
Anatomic Total Shoulder System
Full Text Available ... to feel free to e-mail questions. And should anyone require any additional information, please feel free ... And that's the kind of view that you should get of the humerus when you do that, ...
Full Text Available ... affect anyone. Watch the “d’cisions” Videos Campaign Materials After the Party Posters: We have developed posters ... the Learn the Link message. Campaign messages and materials were tested among various groups of young people, ...
How to Spot the Warning Signs of Heat Stroke
... overweight or underweight, Drinking alcohol. When temperatures, air pollution and humidity spike, older people with chronic health ... Confusion or combativeness, Strong, rapid pulse, Dry, flushed skin, Lack of sweating, Feeling faint, Staggering, Coma. Anyone ...
... regularly to determine your response to felodipine.Good dental hygiene decreases the chance and severity of gum swelling. Brush your teeth regularly and schedule dental cleanings every 6 months.Do not let anyone ...
Virginia Tech Mobile delivers news to cell phones, PDAs
Lazenby, Jenna
2006-01-01
Virginia Tech Mobile-a new service that delivers the latest Virginia Tech news and information to cellular phones or personal digital assistants (PDAs)-is now available to anyone interested in the latest news from Virginia Tech.
Whooping Cough and the Pertussis Vaccine
... someone with pertussis, do I need to do anything? Yes, it’s recommended that anyone who comes in ... get very sick with pertussis infection. Is there anything I should ask my health care provider before ...
Anatomic Total Shoulder System
Full Text Available ... WILLIAMS, MD: Okay, great. Just remember that my face mask is contaminated. So there are several keys. ... MD: Should anyone be putting cement on the face of the glenoid? 00:49:04 GERALD WILLIAMS, ...
... or skin cysts. Anyone can get a staph infection. Hospital patients can get staph infections of the skin: ... for and promptly reporting any sign of wound infections Many hospitals encourage patients to ask their providers if they ...
曹雪凌
2002-01-01
From Life Experience While receiving maths symbals with my secondgrade pupils, I draw a greater-than (>)and a less than (<)sign on the blackboard and asked, “Does anyone remember what these mean?”
Clinical Perspectives: 7-Year-Old Girl Has 6 Organs Removed and Retransplanted
Full Text Available ... and then cholocholostomy with the loop iliostomy to protect anastomosis as well to see the profusion of ... we will be able to offer her a solution in the near future. Great. Does anyone have ...
Understanding Sexual Violence Fact Sheet 2014 Sexual violence refers to any sexual activity where consent is not obtained or freely given. Anyone can experience or perpetrate sexual violence. Most victims of ...
Risk Factors for High Blood Pressure
... the NHLBI on Twitter. Risk Factors for High Blood Pressure Anyone can develop high blood pressure; however, age, ... can increase your risk for developing high blood pressure. Age Blood pressure tends to rise with age. About 65 ...
... talk to your doctor if anyone in your household needs to receive a vaccine during your treatment ... Store ustekinumab vials and prefilled syringes in the refrigerator, but do not freeze them. Keep the vials ...
National Aeronautics and Space Administration — MY NASA DATA (MND) is a tool that allows anyone to make use of satellite data that was previously unavailable.Through the use of MND’s Live Access Server (LAS) a...
Making Sense of Senseless Violence
... https://medlineplus.gov/news/fullstory_159900.html Making Sense of Senseless Violence Expert advice to help you -- ... the face of catastrophes. "Anyone can feel a sense of helplessness that the world is a dark ...
AgrAbility: Frequently Asked Questions
... search for and learn liability-related terminology is Wikipedia on the web. For example, the following definitions ... liability, tort, and negligence” were all taken from Wikipedia. Anyone could easily assemble their own electronic dictionary ...
Videos, Podcasts and Livechats
Full Text Available ... August, 2016 Navigating the uncertain waters of high school and college can be challenging for anyone. Imagine ... That meant taking all advanced courses in high school and being in band, and I had a ...
Kas keegi on kodus? : oma varju jälil / Zinovi Zinik ; inglise keelest tõlkinud Märt Väljataga
Zinik, Zinovi
2007-01-01
Ettekanne Euroopa kultuuriajakirjade 20. kohtumisel Sibius 2007. aastal. Eksiilkirjanikest ja kuuluvustundest. Käsitletakse Aleksandr Asarkarinit, Jevgeni Shvartsi, Albert von Chamissot, Hannah Arendti ja Joseph Conradit ning nende loomingut. Orig.: Anyone at home? In pursuit of one's own shadow.
... their prices, she suggested. Federal officials also could ban the use of flavors in e-cigarettes, as ... Drug Administration in May announced regulations that would ban sales of e-cigarettes to anyone younger than ...
Electric power systems analysis and control
Saccomanno, Fabio
2003-01-01
"Highly relevant and timely in scope, the book is essential reading for anyone associated with electric power systems, including students and teachers of power engineering courses, professionals in the industry, consultants, and researchers."--Jacket.
When the Stakes Turn Toxic: Learn about Problem Gambling
... When the Stakes Turn Toxic Learn About Problem Gambling Anyone who’s bought a lottery ticket or played ... Recognizing Schizophrenia Wise Choices Links Signs of Problem Gambling Are you troubled by gambling? Seek help if: ...
Mastectomy -- The Surgical Procedure
Full Text Available ... to remove it. Most airlines strongly recommend that customers pack breast prosthesis (if not wearing it) or ... m. PT. Our helpline provides free, professional support services to anyone with breast cancer questions or concerns, ...
Osteoporosis makes your bones weak and more likely to break. Anyone can develop osteoporosis, but it is common in older women. As ... than 50 will break a bone due to osteoporosis. Risk factors include Getting older Being small and ...
Taking care of your vascular access for hemodialysis
... described as follows. Fistula: An artery in your forearm is sewn to a vein nearby. This allows ... dialysis treatment. DO NOT let anyone take your blood pressure, start an IV (intravenous line), or draw blood ...
Skin Cancer: Biology, Risk Factors & Treatment
... turn Javascript on. Feature: Skin Cancer Skin Cancer: Biology, Risk Factors & Treatment Past Issues / Summer 2013 Table ... Articles Skin Cancer Can Strike Anyone / Skin Cancer: Biology, Risk Factors & Treatment / Timely Healthcare Checkup Catches Melanoma ...
Get Outside, Get Moving to Prevent 'Gamer's Thumb'
... Outside, Get Moving to Prevent 'Gamer's Thumb' Playing video games hour after hour can trigger repetitive stress injuries, ... anyone who spends a lot of time playing video games. But taking breaks can be just what the ...
I Can Lower My Risk for Type 2 Diabetes: A Guide for American Indians
... Disease Organizations (PDF, 293 KB). Alternate Language URL I Can Lower My Risk for Type 2 Diabetes: ... a blood test at the clinic." [ Top ] Should I be tested for diabetes? Anyone 45 years of ...
Identifying refuge resources of concern and management priorities : A handbook
US Fish and Wildlife Service, Department of the Interior — This handbook provides a strategy for anyone who must identify priorities (refuge resources of concern) that will guide future refuge wildlife and habitat...
Silver metallization stability and reliability
Adams, Daniel; Mayer, James W
2007-01-01
Anyone involved in circuit technology will find this an absolute must-read. It's the first book to discuss the current understanding of silver metallization and its potential as a future interconnect material for integrated circuit technology.
Road to Recovery from Prostate Cancer
Full Text Available ... this live webcast will be archived on the web for anyone to reference in the future. Secondly, ... science, skills, and technology, and that safety and security for our patients is extremely important. Here you’ ...
... to anyone regardless of race, age, sexual orientation, religion, or gender. Domestic violence affects people of all ... ABOUT The Attorney General Budget & Performance Strategic Plans History AGENCIES BUSINESS Business Opportunities Small & Disadvantaged Business Grants ...
Children in Hot Cars Result in Fatal Consequences
Full Text Available ... in Fatal Consequences Emergency physicians are warning the public about the overwhelming dangers associated with leaving anyone, ... Copyright © American College of Emergency Physicians 2016 Privacy Policy Terms of Use
Children in Hot Cars Result in Fatal Consequences
Full Text Available ... Share this! Home » Health Tips » Holiday and Seasonal Children in Hot Cars Result in Fatal Consequences Emergency ... the overwhelming dangers associated with leaving anyone, especially children in hot, unventilated vehicles during the summer. Children ...
Full Text Available ... more likely to have tinnitus For an unknown reason, white, non-hispanics report a higher prevalence of tinnitus than other racial and ethnic groups. High-Risk Groups While anyone, at any time, can develop ...
Full Text Available ... tinnitus than other racial and ethnic groups. High-Risk Groups While anyone, at any time, can develop ... Donate to ATA Support research and programs that benefit the entire tinnitus community. Donate to ATA Become ...
... identify a pinworm infection. Pinworms are small, thin worms that commonly infect young children, although anyone can ... intestine and colon. At night, the female adult worms deposit their eggs outside the rectum or anal ...
... information can travel around the Web in an instant. "Anyone who suffers from cancer, or knows someone ... hair loss, or impotency. back to top This article appears on FDA's Consumer Updates page , which features ...
Full Text Available ... Search form Search Menu Close ... experience tinnitus. While anyone can develop tinnitus, some populations have a higher risk of exposure due to age, occupational hazards, and/ ...
Do Netizens Have the Right to Take the Law Into Their Own Hands?
2007-01-01
Anyone who still has doubts about the power of the Internet, listen up. In May, a video clip showing an elderly geography teacher being verbally abused by his students was posted on the Internet. It elicited immediate outrage among netizens.
Uphill, Thomas
2015-01-01
This book is for anyone who builds and administers servers, especially in a web operations context. It requires some experience of Linux systems administration, including familiarity with the command line, file system, and text editing. No programming experience is required.
Should Internet Jargon Be Allowed in College Entrance Examinations?
2007-01-01
Anyone who has chatted online knows that when the heat is on, brief is best. There is just no time to type out correctly spelled, grammatically gleaming sentenceswhen the gossip gallops across the keyboard. Symbols, jargon, abbreviations, similaritie
Full Text Available ... than other racial and ethnic groups. High-Risk Groups While anyone, at any time, can develop tinnitus, there are some groups that are more vulnerable to acquiring the condition. ...
Full Text Available ... Cure About Us Initiatives News & Events Professional Resources Demographics Millions of Americans experience tinnitus. While anyone can develop tinnitus, some populations have a higher risk of exposure due to ...
Oberhauser, Otto
2007-01-01
Book review of Vanda Broughton, Essential thesaurus construction. London: Facet Publishing, 2006. - v+296p., ISBN 1-85604-565-X. This book is for anyone concerned with the job of document analysis, description, and organization for retrieval.
Be Food Safe: Protect Yourself from Food Poisoning
... this? Submit Button Past Emails CDC Features Be Food Safe: Protect Yourself from Food Poisoning Recommend on Facebook Tweet Share Compartir Anybody ... right steps as Maria does everything wrong. Be Food Safe: Learn the Risks and Rules Anyone can ...
... blackboard may not know that she is seeing differently from anyone else. Nevertheless, even mild deficiencies of sight can significantly affect a child's ability to learn. In some states these screening tests are mandated ...
Children in Hot Cars Result in Fatal Consequences
Full Text Available ... Tips Campaigns SUBSCRIBE Health Tips Share this! Home » Health Tips » Holiday and Seasonal Children in Hot Cars Result in Fatal Consequences Emergency physicians are warning the public about the overwhelming dangers associated with leaving anyone, ...
42 CFR 1001.102 - Length of exclusion.
2010-10-01
...) In convictions involving patient abuse or neglect, the action that resulted in the conviction was..., or (iii) The imposition against anyone of a civil money penalty or assessment under part 1003 of...
... Cure About Us Initiatives News & Events Professional Resources Demographics Millions of Americans experience tinnitus. While anyone can ... people are struggling with severe, sometimes debilitating, tinnitus. Demographic Trends with Tinnitus Tinnitus is primarily caused by ...
Full Text Available ... Cure About Us Initiatives News & Events Professional Resources Demographics Millions of Americans experience tinnitus. While anyone can ... people are struggling with severe, sometimes debilitating, tinnitus. Demographic Trends with Tinnitus Tinnitus is primarily caused by ...
Kali Linux wireless penetration testing beginner's guide
Ramachandran, Vivek
2015-01-01
If you are a security professional, pentester, or anyone interested in getting to grips with wireless penetration testing, this is the book for you. Some familiarity with Kali Linux and wireless concepts is beneficial.
Full Text Available ... tinnitus than other racial and ethnic groups. High-Risk Groups While anyone, at any time, can develop ... some of the groups that are at particular risk of developing tinnitus. Senior Citizens The primary catalyst ...
... of safety to your life. Before getting a pet, think carefully about which animal is best for your family. What is each family member looking for in a pet? Who will take care of it? Does anyone ...
Full Text Available ... enhanced procedures and we created a lot of new procedures. One of those procedures was a totally ... fatigued, almost all the time, to an enormous new sense of energy. Certainly I'd say anyone ...