September 2013 arXiv papers — page 17

P. Munar-Adrover, V. Bosch-Ramon, J. M. Paredes, K. Iwasawa

In the recent years massive protostars have been suggested to be high-energy emitters. Among the best candidates is IRAS 16547-4247, a protostar that presents a powerful outflow with clear signatures of interaction with its environment. This source has been revealed to be a potential high-energy source because it displays non-thermal radio emission of synchr

Gábor Hegedüs, Zijia Li, Josef Schicho, Hans-Peter Schröcker

In this paper, we introduce a method that allows to produce necessary conditions on the Denavit--Hartenberg parameters for the mobility of a closed linkage with six rotational joints. We use it to prove that the genus of the configuration curve of a such a linkage is at most five, and to give a complete classification of the linkages with a configuration cur

G. H. Aguilar, O. Jiménez Farías, A. Valdes-Hernández, P. H. Souto Ribeiro

The open-system dynamics of entanglement plays an important role in the assessment of the robustness of quantum information processes and also in the investigation of the classical limit of quantum mechanics. Here we show that, subjacent to this dynamics, there is a subtle flow of quantum correlations. We use a recently proposed optical setup, which allows j

Vladyslav Babenko, Oleg Kovalenko

Necessary and sufficient conditions on the system of positive numbers $ M_{k_1}, M_{k_2}, M_{k_3}, M_{k_4}$, $0= k_1<k_2<k_3=r-2$, $k_4 = r$, which guarantee the existence of a function $x\in L_{\infty,\infty}^r(R)$, such that $\|x^{(k_i)}\|_{\infty}=M_{k_i},\; i=1,2,3,4, $ are found.

Vitalii Marchenko

We extend a theorem of Kato on similarity for sequences of projections in Hilbert spaces to the case of isomorphic Schauder decompositions in certain Banach spaces. To this end we use $\ell_Ψ$-Hilbertian and $\infty$-Hilbertian Schauder decompositions instead of orthogonal Schauder decompositions, generalize the concept of an orthogonal Schauder decompositio

Luca Franci, Roberto De Pietri, Kyriaki Dionysopoulou, Luciano Rezzolla

We show that magnetic fields stronger than about $10^{15}$ G are able to suppress the development of the hydrodynamical bar-mode instability in relativistic stars. The suppression is due to a change in the rest-mass density and angular velocity profiles due to the formation and to the linear growth of a toroidal component that rapidly overcomes the original

Fazhan Shi, Xi Kong, Pengfei Wang, Fei Kong

Single-molecule nuclear magnetic resonance (NMR) is a crown-jewel challenge in the field of magnetic resonance spectroscopy and has important applications in chemical analysis and in quantum computing. Recently, it becomes possible to tackle this grand challenge thanks to experimental advances in preserving quantum coherence of nitrogen-vacancy (NV) center s

Chris Milling, Constantine Caramanis, Shie Mannor, Sanjay Shakkottai

The history of infections and epidemics holds famous examples where understanding, containing and ultimately treating an outbreak began with understanding its mode of spread. Influenza, HIV and most computer viruses, spread person to person, device to device, through contact networks; Cholera, Cancer, and seasonal allergies, on the other hand, do not. In thi

Gian-Luca Oppo, Alison M. Yao, Domenico Cuozzo

Spatio-temporal dynamics of singly resonant optical parametric oscillators with external seeding displays hexagonal, roll and honeycomb patterns, optical turbulence, rogue waves and cavity solitons. We derive appropriate mean-field equations with a sinc$^2$ nonlinearity and demonstrate that off-resonance seeding is necessary and responsible for the formation

Fabien Nugier

The first objective of this thesis is to fill the lack in cosmology of a description on the past light cone: the null hypersurface on which observed signals propagate. Its second goal is to evaluate the importance of inhomogeneities in the determination of dark energy parameters, whose real nature is still unknown and for which the influence of matter struct

Lucia Oliva, Paolo Castorina, Vincenzo Greco, Marco Ruggieri

We study a model of quark-gluon plasma of 2+1 flavors Quantum Chromodynamics in terms of quasiparticles propagating in a condensate of Polyakov loops. The Polyakov loop is coupled to quasiparticles by means of a gas-like effective potential. This study is useful to identify the effective degrees of freedom propagating in the medium above the critical tempera

B. Ercolano, A. Glassgold

Low-mass young stellar objects are powerful emitters of X-rays that can ionize and heat the disks and the young planets they harbour. The X-rays produce molecular ions that affect the chemistry of the disk atmospheres and their spectroscopic signatures. Deeper down, X-rays are the main ionization source and influence the operation of the magnetorotational in

G. Kaniadakis

We present the main features of the mathematical theory generated by the κ-deformed exponential function exp_κ(x)=(\sqrt{1+κ^2 x^2}+κx)^{1/κ}, with 0<κ<1, developed in the last twelve years, which turns out to be a continuous one parameter deformation of the ordinary mathematics generated by the Euler exponential function. The κ-mathematics has its roots in

Juan Pallotta, Pablo Ristori, Lidia Otero, Fernando Chouza

At CEILAP (CITEDEF-CONICET), a multiangle LIDAR is under development to monitor aerosol extinction coefficients in the frame of the CTA (Cherenkov Telescope Array) Project. This is an initiative to build the next generation of ground-based instruments to collect very high energy gamma-ray radiation (>10 GeV). The atmospheric conditions are very important for

L. H. S. Kadowaki, E. M. de Gouveia Dal Pino

Fast magnetic reconnection events can be a very powerful mechanism operating at the jet launching region of microquasars and AGNs. We have recently found that the power released by reconnection between the magnetic field lines of the coronal inner disk region and the lines anchored into the black hole is able to accelerate relativistic particles through a fi

Andrei A. Fedorenko, Pierre Le Doussal, Kay Joerg Wiese

We study, beyond the Gaussian approximation, the decay of the translational order correlation function for a d-dimensional scalar periodic elastic system in a disordered environment. We develop a method based on functional determinants, equivalent to summing an infinite set of diagrams. We obtain, in dimension d=4-epsilon, the even n-th cumulant of relative

Yordan Kalmukov

This article focuses on the importance of the precise calculation of similarity factors between papers and reviewers for performing a fair and accurate automatic assignment of reviewers to papers. It suggests that papers and reviewers&#39; competences should be described by taxonomy of keywords so that the implied hierarchical structure allows similarity mea

Shumi Kinjo

We construct two infinite sequences of immersions of the 3-sphere into 4-space, parameterized by the Dynkin diagrams of types A and D. The construction is based on immersions of 4-manifolds obtained as the plumbed immersions along the weighted Dynkin diagrams. We compute their Smale invariants and bordism classes of immersions by using Ekholm-Takase&#39;s fo

F. Marocco, A. H. Andrei, R. L. Smart, H. R. A. Jones

We present near-infrared spectroscopy for 52 ultracool dwarfs, including two newly discovered late-M dwarfs, one new late-M subdwarf candidate, three new L and four new T dwarfs. We also present parallaxes and proper motions for 21 of them. Four of the targets presented here have previous parallax measurements, while all the others are new values. This allow

E. Wandersman, A. Cēbers, E. Dubois, G. Mériguet

In the present study we probe the bulk modulus and the structure of concentrated magnetic fluids by Small Angle X-ray Scattering. The electrostatically stabilized nanoparticles experience a repulsive interparticle potential modulated by dipolar magnetic interactions. On the interparticle distance lengthscale, we show that nanoparticles are trapped under-fiel

Deniz Kus

We study the polytope model for the affine type $A$ Kirillov-Reshetikhin crystals and prove that the action of the affine Kashiwara operators can be described in a remarkable simple way. Moreover, we investigate the combinatorial $R$-matrix on a tensor product of polytopes and characterize the map explicitly on the highest weight elements. We further give a

Giuseppe Da Prato, Alessandra Lunardi

We consider an elliptic Kolmogorov equation lambda u - Ku =f in a convex subset C of a separable Hilbert space X. We prove maximal Sobolev regularity of its weak solution, when lambda >0 and f is in L^2(C,nu), where nu is the log-concave measure associated to the system. Moreover we prove maximal estimates on the gradient of u, that allow to show that u sati

Simao P. S. Santos, Natalia Martins, Delfim F. M. Torres

We obtain a generalized Euler-Lagrange differential equation and transversality optimality conditions for Herglotz-type higher-order variational problems. Illustrative examples of the new results are given.

He Chuang-Ye, Wu Xiao-Guang, Zheng Yun, Li Cong-Bo

186Pt was tested in the framework of IBM-1 and the X(3) model. The results show that 186Pt is located close to the shape phase transition point, but the B(E2) values little agree with the X(3) model. The shape evolution in the yrast states of 186Pt is also discussed in detail. TRS calculation exhibits a at bottomed potential at low spin states, but a relativ

Qingfeng Zeng, Junhui Peng, Artem R. Oganov, Qiang Zhu

Hafnium carbides are studied by a systematic search for possible stable stoichiometric compounds in the Hf-C system at ambient pressure using variable-composition ab initio evolutionary algorithm implemented in the USPEX code. In addition to well-known HfC, we predicted two additional compounds Hf3C2 and Hf6C5. The structure of Hf6C5 with space group C2/m co

P. Castangia, F. Panessa, C. Henkel, M. Kadler

Large column densities, derived from X-ray studies, are typically measured towards AGN hosting water masers, especially when the H2O emission is associated with the nuclear accretion disk. In addition, possible correlations between the intrinsic X-ray luminosity and the characteristics of the H2O maser emission have been put forward that, however, require co

B. Schmieder, Y. Guo, F. Moreno-Insertis, G. Aulanier

A broad jet was observed in a weak magnetic field area at the edge of active region NOAA 11106. The peculiar shape and magnetic environment of the broad jet raised the question of whether it was created by the same physical processes of previously studied jets with reconnection occurring high in the corona. We carried out a multi-wavelength analysis using th

Tony Wong, Rui Xue, Alberto D. Bolatto, Adam K. Leroy

We investigate the correlation between CO and HI emission in 18 nearby galaxies from the CARMA Survey Toward IR-Bright Nearby Galaxies (STING) at sub-kpc and kpc scales. Our sample, spanning a wide range in stellar mass and metallicity, reveals evidence for a metallicity dependence of the HI column density measured in regions exhibiting CO emission. Such a d

Yiyu Liang, Eiichi Nakai, Dachun Yang, Junqiang Zhang

Let $φ: {\mathbb R^n}\times [0,\infty)\to[0,\infty)$ be such that $\vz(x,\cdot)$ is nondecreasing, $φ(x,0)=0$, $φ(x,t)>0$ when $t>0$, $\lim_{t\to\infty}φ(x,t)=\infty$ and $\vz(\cdot,t)$ is a Muckenhoupt $A_\infty({\mathbb R^n})$ weight uniformly in $t$. Let $ϕ: [0,\infty)\to[0,\infty)$ be nondecreasing. In this article, the authors introduce the Musielak-Orl

Samuel Tinguely

Let G be a compact, connected and simply connected Lie group, and ΩG the space of the loops in G based at the identity. This note shows a way to compute the cohomology of the total space of a principal ΩG-bundle over a manifold M, from the cohomology of G, the differential forms on M and the characteristic classes of the bundle. The equivariant situation is

Hans-Joachim Baues, Beatrice Bleile

It is well-known how to compute the structure of the second homotopy group of a space, $X$, as a module over the fundamental group, $π_1X$, using the homology of the universal cover and the Hurewicz isomorphism. We describe a new method to compute the third homotopy group, $π_3 X$, as a module over $π_1 X$. Moreover, we determine $π_3 X$ as an extension of $

Christian Brinch, Jes K. Jørgensen

A fundamental part of the study of star formation is to place young stellar objects in an evolutionary sequence. Establishing a robust evolutionary classification scheme allows us not only to understand how the Sun was born but also to predict what kind of main sequence star a given protostar will become. Traditionally, low-mass young stellar objects are cla

Csilla Bujtás, Zsolt Tuza

Combinatorial batch codes provide a tool for distributed data storage, with the feature of keeping privacy during information retrieval. Recently, Balachandran and Bhattacharya observed that the problem of constructing such uniform codes in an economic way can be formulated as a Turán-type question on hypergraphs. Here we establish general lower and upper bo

Michael Lampis, Valia Mitsou

The game of SET is a popular card game in which the objective is to form Sets using cards from a special deck. In this paper we study single- and multi-round variations of this game from the computational complexity point of view and establish interesting connections with other classical computational problems. Specifically, we first show that a natural gene

A. I. Neishtadt, A. A. Vasiliev, A. V. Artemyev

We study dynamics of a nonlinear pendulum under a periodic force with small amplitude and slowly decreasing frequency. It is well known that when the frequency of the external force passes through the value of the frequency of the unperturbed pendulum&#39;s oscillations, the pendulum can be captured into the resonance. The captured pendulum oscillates in suc

Sagi Ben-Ami, Avishay Gal-Yam, Paolo A. Mazzali, Maryam Modjaz

We present our observations of SN 2010mb, a Type Ic SN lacking spectroscopic signatures of H and He. SN 2010mb has a slowly-declining light curve ($\sim600\,$days) that cannot be powered by $^{56}$Ni/$^{56}$Co radioactivity, the common energy source for Type Ic SNe. We detect signatures of interaction with hydrogen-free CSM including a blue quasi-continuum a

Bernardo Orvananos, Todd R. Ferguson, Hui-Chia Yu, Martin Z. Bazant

In nanoparticulate phase-separating electrodes, phase separation inside the particles can be hindered during their charge/discharge cycles even when a thermodynamic driving force for phase separation exists. In such cases, particles may (de)lithiate discretely in a process referred to as mosaic instability. This instability could be the key to elucidating th

H. Bartosik, W. Hofle, G. Iadarola, Y. Papaphilippou

After a successful scrubbing run in the beginning of 2011, the LHC can be presently operated with high intensity proton beams with 50 ns bunch spacing. However, strong electron cloud effects were observed during machine studies with the nominal beam with 25 ns bunch spacing. In particular, fast transverse instabilities were observed when attempting to inject

Istvan Szalkai, Zsolt Tuza

In this paper we formulate and solve extremal problems in the d-dimensional Euclidean space and further in hypergraphs, originating from problems in stoichiometry and elementary linear algebra. The notion of affine simplex is the bridge between the original problems and the presented extremal theorem on set systems. A function related to Sperners theorem and

Nathalie Ysard, Alain Abergel, Isabelle Ristorcelli, Mika Juvela

We observed the L1506 filament, which is located in the Taurus molecular complex, with the Herschel PACS and SPIRE instruments. Our aim is to prove the variation in grain properties along the entire length of the filament. In particular, we want to determine above which gas density this variation arises and what changes in the grain optical properties/size d

Eugene Seneta

The Weak Law of Large Numbers is traced chronologically from its inception as Jacob Bernoulli&#39;s Theorem in 1713, through De Moivre&#39;s Theorem, to ultimate forms due to Uspensky and Khinchin in the 1930s, and beyond. Both aspects of Jacob Bernoulli&#39;s Theorem: 1. As limit theorem (sample size $n\to\infty$), and: 2. Determining sufficiently large sam

V. V. Tikhomirov, S. E. Siahlo

An algorithm of particle-in-cell simulations is described and tested to aid further the actual design of simple vircators working on axially symmetric modes. The methods of correction of the numerical solution, have been chosen and jointly tested, allow the stable simulation of the fast nonlinear multiflow dynamics of virtual cathode formation and evolution,

Alexander Koldobsky

A $\sqrt{n}$ estimate in the hyperplane problem with arbitrary measures has recently been proved in \cite{K3}. In this note we present analogs of this result for sections of lower dimensions and in the complex case. We deduce these inequalities from stability in comparison problems for different generalizations of intersection bodies.

Xian O. Camanho, Jose D. Edelstein, Jose M. Sanchez de Santos

Lovelock theory is the natural extension of general relativity to higher dimensions. It can be also thought of as a toy model for ghost-free higher curvature corrections in gravitational theories. It admits a family of AdS vacua, which provides an appealing arena to explore different holographic aspects in a broader setup within the context of the AdS/CFT co

Aline Herman, Cedric Vandenbem, Olivier Deparis, Priscilla Simonis

The birdwings butterfly Troides magellanus possesses interesting properties for light and thermal radiation management. The black wings of the male exhibit strong (98%) absorption of visible light as well as two strong absorption peaks in the infrared both due to chitin. These peaks are located in the spectral region where the black body emits at 313K. The s

Urs Frauenfelder, Felix Schlenk

We give lower bounds for the growth of the number of Reeb chords and for the volume growth of Reeb flows on spherizations over closed manifolds M that are not of finite type, have virtually polycyclic fundamental group, and satisfy a mild assumption on the homology of the based loop space. For the special case of geodesic flows, these lower bounds are: (i) F

Jannik Vollmer, Denis Menshykau, Dagmar Iber

Most models of biological pattern formation are simulated on continuous domains even though cells are discrete objects that provide internal boundaries to the diffusion of regulatory components. In our previous papers on simulating organogenesis in COMSOL (Germann et al COMSOL Conf Procedings 2011; Menshykau and Iber, COMSOL Conf Proceedings 2012) we discuss

Dalibor Nosek, Stanislav Stefanik, Jana Noskova

A way of examining a hypothetical non--zero $γ$--ray signal for the time changes is presented. The time variability of the recently observed $γ$--ray source PKS 2155--304 is discussed. Several measurements were found to be excessive or deficient with large significances on time scales of months and days.

Alessandro De Paris

At the time of writing, the general problem of finding the maximal Waring rank for homogeneous polynomials of fixed degree and number of variables (or, equivalently, the maximal symmetric rank for symmetric tensors of fixed order and in fixed dimension) is still unsolved. To our knowledge, the answer for ternary quartics is not widely known and can only be f

Juan Núñez, María Luisa Rodríguez-Arévalo, María Trinidad Villar

In this paper, we introduce some particular families of graphicable algebras obtained by following a relatively new line of research, initiated previously by some of the authors. It consists of the use of certain objects of Discrete Mathematics, mainly graphs and digraphs, to facilitate the study of graphicable algebras, which are a subset of evolution algeb

Mickaël Dardaillon, Cédric Lauradoux, Tanguy Risset

In this paper, we explore new area/throughput trade- offs for the Girault, Poupard and Stern authentication protocol (GPS). This authentication protocol was selected in the NESSIE competition and is even part of the standard ISO/IEC 9798. The originality of our work comes from the fact that we exploit a fixed key to increase the throughput. It leads us to im

Mickaël Dardaillon, Kevin Marquet, Tanguy Risset, Antoine Scherrer

In this paper we present a survey of existing prototypes dedicated to software defined radio. We propose a classification related to the architectural organization of the pro- totypes and provide some conclusions about the most promising architectures. This study should be useful for cognitive radio testbed designers who have to choose between many possible

J. M. Madiedo, J. M. Trigo-Rodriguez, A. J. Castro-Tirado, J. L. Ortiz

A Geminid fireball with an absolute magnitude of -13 was observed over the south of Spain on Dec. 15, 2009. This extraordinarily bright event (the brightest Geminid ever recorded by our team) was imaged from two meteor observing stations operated by the SPanish Meteor Network (SPMN). The bolide exhibited fast and quasi-periodic variations in brightness, a be

J. I. Vestgarden, Y. M. Galperin, T. H. Johansen

At low temperatures the critical state in superconducting films can be unstable with respect to thermomagnetic dendritic avalanches. By numerical simulations of disk-shaped superconductors, we consider how the dynamics and morphology of the avalanches depend on the disk thickness. We find that as the disks get thicker, the jumps in magnetic moment caused by

Iosif Galanakis

Preliminary results on the properties of transition-metal (Ti, V, Cr, Mn, Fe, Co, Ni) $δ$-doped ZnO are reported. Using \emph{ab-initio} electronic structure calculations the magnetic order is studied assuming both the cubic rock-salt and zinc-blende structures for ZnO. The ground state magnetic order is found to depend strongly on the transition-metal atom.

Boeche C., the RAVE collaboration

RAVE is a spectroscopic survey of the Milky Way which collected more than 500,000 stellar spectra of nearby stars in the Galaxy. The RAVE consortium analysed these spectra to obtain radial velocities, stellar parameters and chemical abundances. These data, together with spatial and kinematic information like positions, proper motions, and distance estimation

Alexander D. Kolesink

We consider two independent symmetric Markov random flights $\bold Z_1(t)$ and $\bold Z_2(t)$ performed by the particles that simultaneously start from the origin of the Euclidean plane $\Bbb R^2$ in random directions distributed uniformly on the unit circumference $S_1$ and move with constant finite velocities $c_1>0, \; c_2>0$, respectively. The new random

Yuzhu Jiang, Shuai Cui, Junpeng Cao, Wen-Li Yang

Recently, the XXX spin chain with arbitrary boundary fields was successfully solved [1] via the off-diagonal Bethe ansatz method [2]. The correctness and the completeness of this solution were numerically verified by Nepomechie for one choice of the parameterizations [3]. In this paper, we discuss further the completeness of another parameterization of the B

Gwen Spencer, Richard Howarth

In an effort to understand why individuals choose to participate in personally-expensive pro-environmental behaviors, environmental and behavioral economists have examined a moral-motivation model in which the decision to adopt a pro-environmental behavior depends on the society-wide market share of that behavior. An increasing body of practical research on

Krzysztof Bogdan, Tomasz Komorowski

We add a divergence-free drift with increasing magnitude to the fractional Laplacian on a bounded smooth domain, and discuss the behavior of the principal eigenvalue for the Dirichlet problem. The eigenvalue remains bounded if and only if the drift has non-trivial first integrals in the domain of the quadratic form of the fractional Laplacian.

F. Cadiz, D. Paget, A. C. H. Rowe

Spin-polarized transport of photo-electrons in bulk, p-type GaAs is investigated in the Pauli blockade regime. In contrast to usual spin diffusion processes in which the spin polarization decreases with distance traveled due to spin relaxation, images of the polarized photo-luminescence reveal a spin-filter effect in which the spin polarization increases dur

Paulo Shakarian, Jana Shakarian, Andrew Ruef

Along with the USA and Russia, China is often considered one of the leading cyber-powers in the world. In this excerpt, we explore how Chinese military thought, developed in the 1990s, influenced their cyber-operations in the early 2000s. In particular, we examine the ideas of &#34;Unrestricted Warfare&#34; and &#34;Active Offense&#34; and discuss how they c

German Terrazas, Hector Zenil, Natalio Krasnogor

Self-assembly is a phenomenon observed in nature at all scales where autonomous entities build complex structures, without external influences nor centralised master plan. Modelling such entities and programming correct interactions among them is crucial for controlling the manufacture of desired complex structures at the molecular and supramolecular scale.

Alessandro Morando, Paolo Secchi, Paola Trebeschi

Motivated by the study of certain non linear free-boundary value problems for hyperbolic systems of partial differential equations arising in Magneto-Hydrodynamics, in this paper we show that an a priori estimate of the solution to certain boundary value problems, in the conormal Sobolev space H1_tan, can be transformed into an L2 a priori estimate of the sa

A. Molina-Sánchez, A. García-Cristóbal, A. Cantarero, A. Terentjevs

In this paper we employ a combined {\it ab initio} and tight-binding approach to obtain the electronic and optical properties of hydrogenated InN nanowires. We first discuss InN band structure for the wurtzite structure calculated at the LDA+U level and use this information to extract the parameters needed for an empirical tight-binging implementation. These

Thomas Liebmann, Hans Blom, Anita Aperia, Hjalmar Brismar

The dimensions of neuronal synapses suggest that optical super-resolution imaging methods are necessary for thorough investigation of protein distributions and interactions. Nanoscopic evaluation of neuronal samples has presented practical hurdles, but advancing methods are making synaptic protein topology and quantification measurements feasible. This work

Malte Schroeder, S. H. Ebrahimnazhad Rahbari, Jan Nagler

Crackling noise is a common feature in many systems that are pushed slowly, the most familiar instance of which is the sound made by a sheet of paper when crumpled. In percolation and regular aggregation clusters of any size merge until a giant component dominates the entire system. Here we establish `fractional percolation&#39; where the coalescence of clus

A. Birsan, P. Palade

Within the framework of density functional theory, the electronic structure and magnetic properties have been studied for the Ti\raisebox{-.2ex}{\scriptsize 2}FeSn full-Heusler compound. The ferromagnetic state is found to be energetically more favorable than paramagnetic and antiferromagnetic states. The spin-polarized results show that Ti\raisebox{-.2ex}{\

Alexander Plakhov

Here we solve the problem posed by Comte and Lachand-Robert in (2001). Take a bounded domain Ωin R^2 and a piecewise smooth non-positive function u : \barΩ \to R vanishing on the boundary of Ω. Consider a flow of point particles falling vertically down and reflected elastically from the graph of u. It is assumed that each particle is reflected no more than o

Elizabeth Goiri, Manfred Matena, Afaf El-Sayed, Jorge Lobo-Checa

Codeposition of two molecular species [CuPc (donor) and PFP (acceptor)] on noble metal (111) surfaces leads to the self-assembly of an ordered mixed layer with maximized donor-acceptor contact area. The main driving force behind this arrangement is assumed to be the intermolecular C-F...H-C hydrogen-bond interactions. Such interactions would be maximized for

Bo Wang, Yu-lian Zhang, Hui-Rong Qi, Jing Liu

In this paper, the effect of humidity and dust trapped in avalanche region on leakage current of bulk micro-MEGAS detector is studied. Pyralux PC1025 layers of DuPont are introduced in bulk technique and micro-MEGAS detector with pillars of 300μm in diameter is fabricated. Leakage current is tested in air with different humidity. Silicon carbide powder and P

A. Birsan, P. Palade, V. Kuncser

The half metallic properties of Ti\raisebox{-.2ex}{\scriptsize 2}CoSn full-Heusler compound is studied within the framework of the density functional theory with the Perdew Burke Ernzerhof generalized gradient approximation (GGA). Structural optimization was performed and the calculated equilibrium lattice constant is 6.340 A. The spin up band of compound ha

Simon Vaughan

Progress in astronomy comes from interpreting the signals encoded in the light received from distant objects: the distribution of light over the sky (images), over photon wavelength (spectrum), over polarization angle, and over time (usually called light curves by astronomers). In the time domain we see transient events such as supernovae, gamma-ray bursts,

A. Amariti

We study two well-known classes of dualities in three dimensional N=2 supersymmetric field theories. In the first class there are non trivial interactions involving monopole operators while in the second class the dual gauge theories have Chern-Simons terms in the action. An RG flows connecting the first dual pair to the second one has been studied in the pa

Mohammad Bazmara, Shahram Jafari, Fatemeh Pasand

Goalkeeper (GK) is an expert in soccer and goalkeeping is a complete professional job. In fact, achieving success seems impossible without a reliable GK. His effect in successes and failures is more dominant than other players. The most visible mistakes in a game are those of goalkeeper&#39;s. In this paper the expert fuzzy system is used as a suitable tool

Frederic A. L. Mauguiere, Peter Collins, Gregory S. Ezra, Stavros C. Farantos

We provide a dynamical interpretation of the recently identified `roaming&#39; mechanism for molecular dissociation reactions in terms of geometrical structures in phase space. These are NHIMs (Normally Hyperbolic Invariant Manifolds) and their stable/unstable manifolds that define transition states for ion-molecule association or dissociation reactions. The

Ian Melbourne, Roland Zweimüller

We consider weak invariance principles (functional limit theorems) in the domain of a stable law. A general result is obtained on lifting such limit laws from an induced dynamical system to the original system. An important class of examples covered by our result are Pomeau-Manneville intermittency maps, where convergence for the induced system is in the sta

A. Birsan, P. Palade, V. Kuncser

The electronic and magnetic properties of Ti\raisebox{-.2ex}{\scriptsize 2}CoSi Heusler compound are investigated using density functional calculations. The optimized lattice constant is found to be 6.030 A. The compound is a half-metallic ferromagnet with an energy gap in minority spin channel of 0.652 eV at equilibrium lattice constant, which leads to a 10

J. Bhattacharyya, S. Zybell, F. Eßer, M. Helm

Time-resolved terahertz quenching studies of the magnetoexcitonic photoluminescence from GaAs/AlGaAs quantum wells are performed. A microscopic theory is developed to analyze the experiments. Detailed experiment-theory comparisons reveal a remarkable magnetic-field controllability of the Coulomb and terahertz interactions in the excitonic system.

Filippo Bracci, Manuel D. Contreras, Santiago Díaz-Madrigal, Alexander Vasil&#39;ev

In this paper we present a historical and scientific account of the development of the theory of the Löwner-Kufarev classical and stochastic equations spanning the 90-year period from the seminal paper by K.Löwner in 1923 to recent generalizations and stochastic versions and their relations to conformal field theory.

Hong Xu, Baochun Li

We advocate to create a \emph{spot} Internet transit market, where transit is sold using the under-utilized backbone capacity at a lower price. The providers can improve profit by capitalizing the perishable capacity, and customers can buy transit on-demand without a minimum commitment level for elastic traffic, and as a result improve its surplus (i.e. util

Felipe Cano, Marianna Ravara-Vago, Marcio Soares

This paper is devoted to studying the structure of codimension one singular holomorphic foliations on $({\mathbb C}^3,0)$ without invariant germs of analytic surface. We focus on the so-called CH-foliations, that is, foliations without saddle nodes in two dimensional sections. Considering a reduction of singularities, we detect the possible existence of &#34

Harishchandra Singh, Haranath Ghosh, A. K. Sinha, M. N. Singh

We report observation of magneto-electric and magneto-dielectric couplings in ceramic Co3TeO6. Temperature dependent DC magnetization and dielectric constant measurements together indicate coupling between magnetic order and electronic polarization. Strong anomaly in dielectric constant at ~ 18K in zero magnetic field indicates presence of spontaneous polari

Peter Hartmann, Zoltán Donkó, Torben Ott, Hanno Kählert

A rotating dusty plasma apparatus was constructed to provide the possibility of experimental emulation of extremely high magnetic fields by means of the Coriolis force, observable in a co-rotating measurement frame. We present collective excitation spectra for different rotation rates with a magnetic induction equivalent of up to 3200 Tesla. We identify the

Zhen-Qing Chen, Longmin Wang

Suppose that $d\geq1$ and $α\in (1, 2)$. Let $Y$ be a rotationally symmetric $α$-stable process on $\R^d$ and $b$ a $\R^d$-valued measurable function on $\R^d$ belonging to a certain Kato class of $Y$. We show that $\rd X^b_t=\rd Y_t+b(X^b_t)\rd t$ with $X^b_0=x$ has a unique weak solution for every $x\in \R^d$. Let $\sL^b=-(-Δ)^{α/2} + b \cdot \nabla$, whic

K. S. Cheng

In this review paper we explain the following gamma-ray emission features from the millisecond pulsars. (1)Why is the dipolar field of millisecond pulsars so weak but the magnetic pair creation process may still be able to control the size of the outergap? (2)A sub-GeV pulse component could occur in the vicinity of the radio pulse of millisecond pulsars. (3)

M. Jagadesh Kumar, Sindhu Janardhanan

Using calibrated simulations, we report a detailed study of the doping-less tunnel field effect transistor (TFET) on a thin intrinsic silicon film using charge plasma concept. Without the need for any doping, the source and drain regions are formed using the charge plasma concept by choosing appropriate work functions for the source and drain metal electrode

Vyacheslav G. Storchak, Jess H. Brewer, Dmitry G. Eshchenko, Patrick W. Mengyan

Muon spin rotation ($μ^+$SR) experiments have been carried out in the heavy fermion compound UBe$_{13}$ in the temperature range from 0.025 K to 300 K and in magnetic fields up to 7 T, supported by resistivity and magnetization measurements. The $μ^+$SR spectra are characteristic of formation of a spin polaron which persists to the lowest temperature. A gap

N. Christopher Phillips

For $p \in [1, \infty),$ we define and study full and reduced crossed products of algebras of operators on $σ$-finite $L^p$ spaces by isometric actions of second countable locally compact groups. We give universal properties for both crossed products. When the group is abelian, we prove the existence of a dual action on the full and reduced $L^p$ operator cr

Caner Nazaroglu

We associate a Jacobi form over a rank s lattice to N=2, D=4 heterotic string compactifications which have s Wilson lines at a generic point in the vector multiplet moduli space. Jacobi forms of index m=1 and m=2 have appeared earlier in the context of threshold corrections to heterotic string couplings. We emphasize that higher index Jacobi forms as well as

Heinz H. Bauschke, Jiawei Chen, Xianfu Wang

We introduce an abstract algorithm that aims to find the Bregman projection onto a closed convex set. As an application, the asymptotic behaviour of an iterative method for finding a fixed point of a quasi Bregman nonexpansive mapping with the fixed-point closedness property is analyzed. We also show that our result is applicable to Bregman subgradient proje

Masanori Nagao, Satoshi Demura, Keita Deguchi, Akira Miura

F-substituted NdOBiS2 superconducting single crystals were grown using CsCl/KCl flux. This is the first example of the single-crystal growth of a BiS2-based superconductor. The obtained single crystals had a plate-like shape with a size of 1-2 mm and a well-developed ab-plane. The crystal structure of the grown crystals was determined by single-crystal X-ray

Quentin G. Bailey, Ryan D. Everett, James M. Overduin

Generic violations of Lorentz symmetry can be described by an effective field theory framework that contains both general relativity and the standard model of particle physics called the Standard-Model Extension (SME). We obtain new constraints on the gravitational sector of the SME using recently published final results from Gravity Probe B. These include f

Ahmed El Shafie, Ahmed Sultan

In this paper, we consider a time-slotted cognitive radio (CR) setting with buffered and energy harvesting primary and CR users. At the beginning of each time slot, the CR user probabilistically chooses the spectrum sensing duration from a predefined set. If the primary user (PU) is sensed to be inactive, the CR user accesses the channel immediately. The CR

Hitoshi Nishino, Subhash Rajpoot

We present a variant formulation of N=1 supersymmetric compensator mechanism for an arbitrary non-Abelian group in four dimensions. This formulation resembles our previous variant supersymmetric compensator mechanism in 4D. Our field content consists of the three multiplets: (i) A Non-Abelian Yang-Mills multiplet (A_μ^I, λ^I, C_{μνρ}^I), (ii) a tensor multip

Rhys Martin, Ognjen Arandjelović

This paper addresses the problem of tracking moving objects of variable appearance in challenging scenes rich with features and texture. Reliable tracking is of pivotal importance in surveillance applications. It is made particularly difficult by the nature of objects encountered in such scenes: these too change in appearance and scale, and are often articul

Ognjen Arandjelović

In this paper we are interested in analyzing behaviour in crowded public places at the level of holistic motion. Our aim is to learn, without user input, strong scene priors or labelled data, the scope of &#34;normal behaviour&#34; for a particular scene and thus alert to novelty in unseen footage. The first contribution is a low-level motion model based on

Bryce Kerr

Let $χ$ a primitive character$\pmod q$ and consider the Dirichlet $L$-function $$L(s,χ)=\sum_{n=1}^{\infty}\frac{χ(n)}{n^s}.$$ We give a new proof of an upper bound of Heath-Brown for $|L(s,χ)|$ on the critical line $s=1/2+it$

Yuanjie Lei, Huijiang Zhao

A global solvability result of the Cauchy problem of the two-species Vlasov-Maxwell-Landau system near a given global Maxwellian is established by employing an approach different than that of [5]. Compared with that of [5], the minimal regularity index and the smallness assumptions we imposed on the initial data are weaker. Our analysis does not rely on the

Sung Hoon Hwang, Young-Su Lee, Young Whan Cho

Addressing the nature of interaction at the LiBH4-carbon interface is the key to unveiling mechanism for the carbon-facilitated desorption of lithium borohydride (LiBH4). Density functional theory calculations, taking into account the long range dispersion forces, have been performed to explore the interaction between LiBH4, in the form of either a monomer u