cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural stability of interaction networks against negative external fields
Creators: name: Yoon, S.
name: Goltsev, A. V.
name: Mendes, J. F. F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We explore structural stability of weighted and unweighted networks of positively interacting agents against a negative external field. We study how the agents support the activity of each other to confront the negative field, which suppresses the activity of agents and can lead to a collapse of the whole network. The competition between the interactions and the field shape the structure of stable states of the system. In unweighted networks (uniform interactions) the stable states have the structure of $k$-cores of the interaction network. The interplay between the topology and the distribution of weights (heterogeneous interactions) impacts strongly the structural stability against a negative field, especially in the case of fat-tailed distributions of weights. We show that apart critical slowing down there is also a critical change in the system structure that precedes the network collapse. The change can serve as early warning of the critical transition. In order to characterize changes of network structure we develop a method based on statistical analysis of the $k$-core organization and so-called `corona' clusters belonging to the $k$-cores.
description: 11 pages, 9 figures
Necessary and Sufficient Conditions for Representing General Distributions by Coxians
Creators: name: Osogami, Takayuki
name: Harchol-Balter, Mor
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: A common analytical technique involves using a Coxian distribution to model a general distribution G, where the Coxian distribution agrees with G on the first three moments. This technique is motivated by the analytical tractability of the Coxian distribution. Algorithms for mapping an input distribution G to a Coxian distribution largely hinge on knowing a priori the necessary and sufficient number of phases in the representative Coxian distribution. In this paper, we formally characterize the set of distributions G which are well-represented by an n-phase Coxian distribution, in the sense that the Coxian distribution matches the first three moments of G. We also discuss a few common, practical examples
Constraint-based Gait Control Using Differential Inequalities
Creators: name: Urban, Stella Diniz
name: Adorno, Bruno Vilhena
Publisher: name: Zenodo
Year: 2019

description: This paper proposes a bipedal walking controller based on quadratic programming and differential inequalities to keep the gait balance during the complete walking cycle. We design the differential inequalities constraints using geometric primitives within the dual quaternion algebra. Simulations on the lower body of the Poppy humanoid robot show the effectiveness of the approach.
Disequilibrium biosignatures over Earth history and implications for detecting exoplanet life
Creators: name: Krissansen-Totton, Joshua
name: Olson, Stephanie
name: Catling, David C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Chemical disequilibrium in planetary atmospheres has been proposed as a generalized method for detecting life on exoplanets through remote spectroscopy. Among solar system planets with substantial atmospheres, the modern Earth has the largest thermodynamic chemical disequilibrium due to the presence of life. However, how this disequilibrium changed over time and, in particular, the biogenic disequilibria maintained in the anoxic Archean or less oxic Proterozoic eons are unknown. We calculate the atmosphere-ocean disequilibrium in the Precambrian using conservative proxy- and model-based estimates of early atmospheric and oceanic compositions. We omit crustal solids because subsurface composition is not detectable on exoplanets, unlike above-surface volatiles. We find that (i) disequilibrium increased through time in step with the rise of oxygen; (ii) both the Proterozoic and Phanerozoic may have had remotely detectable biogenic disequilibria due to the coexistence of O$_{2}$, N$_{2}$, and liquid water; and (iii) the Archean had a biogenic disequilibrium caused by the coexistence of N$_2$, CH$_4$, CO$_2$, and liquid water, which, for an exoplanet twin, may be remotely detectable. On the basis of this disequilibrium, we argue that the simultaneous detection of abundant CH$_{4}$ and CO$_{2}$ in a habitable exoplanet's atmosphere is a potential biosignature. Specifically, we show that methane mixing ratios greater than 0.001 are potentially biogenic, whereas those exceeding 0.01 are likely biogenic due to the difficulty in maintaining large abiotic methane fluxes to support high methane levels in anoxic atmospheres. Biogenicity would be strengthened by the absence of abundant CO, which should not coexist in a biological scenario.
description: Main text 13 pages, supplementary materials 16 pages
Semilinear wave equations on asymptotically de Sitter, Kerr-de Sitter and Minkowski spacetimes
Creators: name: Hintz, Peter
name: Vasy, Andras
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L71 (Primary) 35L05, 35P25 (Secondary)

description: In this paper we show the small data solvability of suitable semilinear wave and Klein-Gordon equations on geometric classes of spaces, which include so-called asymptotically de Sitter and Kerr-de Sitter spaces, as well as asymptotically Minkowski spaces. These spaces allow general infinities, called conformal infinity in the asymptotically de Sitter setting; the Minkowski type setting is that of non-trapping Lorentzian scattering metrics introduced by Baskin, Vasy and Wunsch. Our results are obtained by showing the global Fredholm property, and indeed invertibility, of the underlying linear operator on suitable L^2-based function spaces, which also possess appropriate algebra or more complicated multiplicative properties. The linear framework is based on the b-analysis, in the sense of Melrose, introduced in this context by Vasy to describe the asymptotic behavior of solutions of linear equations. An interesting feature of the analysis is that resonances, namely poles of the inverse of the Mellin transformed b-normal operator, which are `quantum' (not purely symbolic) objects, play an important role.
description: 81 pages, 6 figures. v2: The appendix of v1 has been removed and posted independently on arxiv. The introduction has been rewritten, connecting text added throughout the paper, and typos corrected. One of the hypotheses of Theorem 5.2 has been removed. v3: the published version, with typos corrected and references updated, includes a brief review of b-analysis in section 2
Evolution of the entanglement of the $N00N$-type of states in a coupled two cavity system via an adiabatic approximation
Creators: name: Chakrabarti, R.
name: Sreekumari, G.
name: Yogesh, V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a system of two cavities each encapsulating a qubit and an oscillator degrees of freedom. An ultrastrong interaction strength between the qubit and the oscillator is assumed, and the photons are allowed to hop between the cavities. A partition of the time scale between the fast moving oscillator and the slow moving qubit allows us to set up an adiabatic approximation procedure where we employ the delocalized degrees of freedom to diagonalize the Hamiltonian. The time evolution of the $N00N$-type initial states now furnishes, for instance, the reduced density matrix of a bipartite system of two qubits. For a macroscopic size of the $N00N$ component of the initial state the sudden death of the entanglement between the qubits and its continued null value are prominently manifest as the information percolates to the qubits after long intervals. For the low photon numbers of the initial states the dynamics produces almost maximally entangled two-qubit states, which by utilizing the Hilbert-Schmidt distance between the density matrices, are observed to be nearly pure generalized Bell states.
Near-optimal sensor placements in Gaussian processes
Creators: name: Guestrin, Carlos
name: Krause, Andreas
name: Singh, Ajit
Publisher: name: Carnegie Mellon University
Year: 2001
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "When monitoring spatial phenomena selecting the best locations for sensors is a fundamental task. To avoid strong assumptions, such as fixed sensing radii, and to tackle noisy measurements, Gaussian processes (GPs) are often used to model the underlying phenomena. A commonly used placement strategy is to select the locations that have highest entropy with respect to the GP model. Unfortunately, this criterion is indirect, since prediction quality for unsensed positions is not considered, and thus suboptimal positions are often selected. In this paper, we propose a mutual information criterion that chooses sensor locations that most reduce uncertainty about unsensed locations. We first show that choosing a set of k sensors that maximizes the mutual information is NP-complete. By exploiting the submodularity of mutual information we propose a polynomial-time algorithm that guarantees a placement within (1 - 1/[epsilon]) of the maxima. This algorithm is extended to exploit local structure in the Gaussian process, significantly improving performance. Finally, we show that the sensor placements chosen by our algorithm can lead to significantly better predictions through extensive experimental validation on two real-world datasets."
The cycle structure of unicritical polynomials
Creators: name: Bridy, Andrew
name: Garton, Derek
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 37P05 (Primary), 37P25, 11R32, 20B35 (Secondary)

description: A polynomial with integer coefficients yields a family of dynamical systems indexed by primes as follows: for any prime $p$, reduce its coefficients mod $p$ and consider its action on the field $\mathbb{F}_p$. The questions of whether and in what sense these families are random have been studied extensively, spurred in part by Pollard's famous "rho" algorithm for integer factorization (the heuristic justification of which is the randomness of one such family). However, the cycle structure of these families cannot be random, since in any such family, the number of cycles of a fixed length in any dynamical system in the family is bounded. In this paper, we show that the cycle statistics of many of these families are as random as possible. As a corollary, we show that most members of these families have many cycles, addressing a conjecture of Mans et. al.
description: 19 pages, minor typos corrected
Venus Equation of Anomaly - al-Battani by van Dalen (Benno) and Pedersen (Fritz S.) (2008) | Type-B (ID n° 832)
Creators: name: van Dalen (Benno) and Pedersen, Fritz S.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2022
Subjects: Astronomy
History of astronomy
DISHAS
Astronomical table

description: This is a type B edition: A type-B edition corresponds to a critical edition of several table witnesses:
 it is based on several different editions, themselves based on tables from different primary sources.
 A type-B edition can be based on type-A, type-B or type-C editions.
You can find it on the DISHAS project website from this link: https://dishas.obspm.fr/table-edition/832
Proximity effect in normal-metal quasiparticle traps
Creators: name: Hosseinkhani, A.
name: Catelani, G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In many superconducting devices, including qubits, quasiparticle excitations are detrimental. A normal metal ($N$) in contact with a superconductor ($S$) can trap these excitations; therefore such a trap can potentially improve the devices performances. The two materials influence each other, a phenomenon known as proximity effect which has drawn attention since the '60s. Here we study whether this mutual influence places a limitation on the possible performance improvement in superconducting qubits. We first revisit the proximity effect in uniform $NS$ bilayers; despite the long history of this problem, we present novel findings for the density of states. We then extend our results to describe a non-uniform system in the vicinity of a trap edge. Using these results together with a phenomenological model for the suppression of the quasiparticle density due to the trap, we find in a transmon qubit an optimum trap-junction distance at which the qubit relaxation rate is minimized. This optimum distance, of the order of 4 to 20 coherence lengths, originates from the competition between proximity effect and quasiparticle density suppression. We conclude that the harmful influence of the proximity effect can be avoided so long as the trap is farther away from the junction than this optimum.
description: 19+ pages, 14 figures
Generation of slow intense optical solitons in a resonance photonic crystal
Creators: name: Mel'nikov, Igor V.
name: Knigavko, Anton
name: Aitchison, J. Stewart
name: Merchant, Clark A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate interesting and previously unforeseen properties of a pair of gap solitons in a resonant photonic crystal which are predicted and explained in a physically transparent form using both analytical and numerical methods. The most important result is the fact that an oscillating gap soliton created by the presence of a localized population inversion inside the crystal can be manipulated by means of a proper choice of bit rate, phase and amplitude modulation. Developing this idea, we are able to obtain qualitatively different regimes of a resonant photonic crystal operation. In particular, a noteworthy observation is that both the delay time and amplitude difference must exceed a certain level to ensure effective control over the soliton dynamics.
Update on scalar singlet dark matter
Creators: name: Cline, James M.
name: Kainulainen, Kimmo
name: Scott, Pat
name: Weniger, Christoph
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: One of the simplest models of dark matter is that where a scalar singlet field S comprises some or all of the dark matter, and interacts with the standard model through an HHSS coupling to the Higgs boson. We update the present limits on the model from LHC searches for invisible Higgs decays, the thermal relic density of S, and dark matter searches via indirect and direct detection. We point out that the currently allowed parameter space is on the verge of being significantly reduced with the next generation of experiments. We discuss the impact of such constraints on possible applications of scalar singlet dark matter, including a strong electroweak phase transition, and the question of vacuum stability of the Higgs potential at high scales.
description: 18 pages, 10 figures. v2: small updates to references and discussion, including a brief passage on continuum gamma rays from the Galactic Centre; matches the version accepted for publication in PRD. v3: updated references to match final published version. v4: corrected CTA observing time, improved clarity of Fermi CL/p-value description. v5: corrected central value of coupling f_N
Near-optimal sensor placements : maximizing information while minimizing communication cost
Creators: name: Krause, Andreas
Publisher: name: Carnegie Mellon University
Year: 1985
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "When monitoring spatial phenomena with wireless sensor networks, selecting the best sensor placements is a fundamental task. Not only should the sensors be informative, but they should also be able to communicate efficiently. In this paper, we present a data-driven approach that addresses the three central aspects of this problem: measuring the predictive quality of a set of sensor locations (regardless of whether sensors are ever placed at these locations), predicting the communication cost involved with these placements, and designing an algorithm with provable quality guarantees that optimizes the NP-hard tradeoff. Specifically, we use data from a pilot deployment to build non-parametric probabilistic models called Gaussian Processes (GPs) both for the spatial phenomena of interest and for the spatial variability of link qualities, which allows us to estimate predictive power and communication cost of unsensed locations. Surprisingly, uncertainty in the representation of link qualities plays an important role in estimating communication costs. Using these models, we present a novel, polynomial-time, data-driven algorithm, pSPIEL, which selects Sensor Placements at Informative and cost-Effective Locations. Our approach exploits two important properties of this problem: submodularity, formalizing the intuition that adding a node to a small deployment can help more than adding a node to a large deployment; and locality, under which nodes that are far from each other provide almost independent information. Exploiting these properties, we prove strong approximation guarantees for our pSPIEL approach. We also provide extensive experimental validation of this practical approach on several real-world placement problems, and built a complete system implementation on 46 Tmote Sky motes, demonstrating significant advantages over existing methods."
Three-dimensional simulations of the interaction between the nova ejecta, the accretion disk, and the companion star
Creators: name: Figueira, Joana
name: Jose, Jordi
name: Garcia-Berro, Enrique
name: Campbell, Simon W.
name: Garcia-Senz, Domingo
name: Mohamed, Shazrene
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. Classical novae are thermonuclear explosions hosted by accreting white dwarfs in stellar binary systems. Material piles up on top of the white dwarf star under mildly degenerate conditions, driving a thermonuclear runaway. The energy released by the suite of nuclear processes operating at the envelope (mostly proton-capture reactions and beta-decays) heats the material up to peak temperatures ranging from 100 to 400 MK. In these events, about 10-3 - 10-7 Msun, enriched in CNO and, sometimes, other intermediate-mass elements (e.g., Ne, Na, Mg, Al), are ejected into the interstellar medium. Aims. To date, most of the efforts undertaken in the modeling of classical nova outbursts have focused on the early stages of the explosion and ejection, ignoring the interaction of the ejecta, first with the accretion disk orbiting the white dwarf, and ultimately with the secondary star. Methods. A suite of three-dimensional, SPH simulations of the interaction between the nova ejecta, the accretion disk, and the stellar companion have been performed to fill this gap, aimed at testing the influence of the different parameters (i.e., mass and velocity of the ejecta, mass and geometry of the accretion disk) on the dynamical and chemical properties of the system. Results. We discuss the conditions that lead to the disruption of the accretion disk and to mass loss from the binary system. In addition, we discuss the likelihood of chemical contamination of the stellar secondary induced by the impact with the nova ejecta and its potential effect on the next nova cycle.
description: Accepted for Publication in Astronomy and Astrophysics
The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
Creators: name: Conselice, Christopher J.
name: Rajgor, Sheena
name: Myers, Robert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper begins a series in which we examine the structures of distant galaxies to directly determine the history of their formation modes. We start this series by examining the structures of z_F850LP < 27 galaxies in the Hubble Ultra-Deep field, the deepest high-resolution optical image taken to date. We investigate a few basic features of galaxy structure using this image. These include: (1) The agreement of visual eye-ball classifications and non-parametric quantitative (CAS, Gini/M_20) methods; (2) How distant galaxy quantitative structures can vary as a function of rest-frame wavelength; and (3) The evolution of distant galaxy structures up to z~3. One of our major conclusions is that the majority of galaxies with z_850 < 27 are peculiar in appearance, and that galaxy assembly is rapidly occurring at these magnitudes, even up to the present time. We find a general agreement between galaxy classification by eye and through quantitative methods, as well as a general agreement between the CAS and the Gini/M_20 parameters. We find that the Gini/M_20 method appears to find a larger number of galaxy mergers than the CAS system, but contains a larger contamination from non-mergers. We furthermore calculate the merger rate of galaxies in the UDF up to z~3, finding an increase with redshift as well as stellar mass, confirming previous work in the Hubble Deep Field. We find that massive galaxies with M_{*} > 10^10 M_0 undergo 4.3_+0.8^-0.8 major galaxy mergers at z < 3, with all of this merging occurring at z > 1.
description: MNRAS, submitted
Near-Optimal Online Auctions
Creators: name: Avrim  Blum
name: Hartline, Jason D.
Publisher: name: Carnegie Mellon University
Year: 1981
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We consider the online auction problem proposed by Bar-Yossef, Hildrum, and Wu [4] in which an auctioneer is selling identical items to bidders arriving one at a time. We give an auction that achieves a constant factor of the optimal profit less an O(h) additive loss term, where h is the value of the highest bid. Furthermore, this auction does not require foreknowledge of the range of bidders' valuations. On both counts, this answers open questions from [4, 5]. We further improve on the results from [5] for the online posted-price problem by reducing their additive loss term from O(h log h log log h) to O(h log log h). Finally, we define the notion of an (offline) attribute auction for modeling the problem of auctioning items to consumers who are not a-priori indistinguishable. We apply our online auction solution to achieve good bounds for the attribute auction problem with 1-dimensional attributes.
An Adiabatic Phase-Matching Accelerator
Creators: name: Lemery, Francois
name: Floettmann, Klaus
name: Piot, Philippe
name: Kaertner, Franz X.
name: Assmann, Ralph
Publisher: name: arXiv
Year: 2017
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We present a general concept to accelerate non-relativistic charged particles. Our concept employs an adiabatically-tapered dielectric-lined waveguide which supports accelerating phase velocities for synchronous acceleration. We propose an ansatz for the transient field equations, show it satisfies Maxwell's equations under an adiabatic approximation and find excellent agreement with a finite-difference time-domain computer simulation. The fields were implemented into the particle-tracking program {\sc astra} and we present beam dynamics results for an accelerating field with a 1-mm-wavelength and peak electric field of 100~MV/m. The numerical simulations indicate that a $\sim 200$-keV electron beam can be accelerated to an energy of $\sim10$~MeV over $\sim 10$~cm. The novel scheme is also found to form electron beams with parameters of interest to a wide range of applications including, e.g., future advanced accelerators, and ultra-fast electron diffraction.
Dynamic Control of Particle Deposition in Evaporating Droplets by an External Point Source of Vapor
Creators: name: Malinowski, Robert
name: Volpe, Giovanni
name: Parkin, Ivan P.
name: Volpe, Giorgio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The deposition of particles on a surface by an evaporating sessile droplet is important for phenomena as diverse as printing, thin-film deposition and self-assembly. The shape of the final deposit depends on the flows within the droplet during evaporation. These flows are typically determined at the onset of the process by the intrinsic physical, chemical and geometrical properties of the droplet and its environment. Here, we demonstrate deterministic emergence and real-time control of Marangoni flows within the evaporating droplet by an external point-source of vapor. By varying the source location, we can modulate these flows in space and time to pattern colloids on surfaces in a controllable manner.
Stimulated low frequency Raman scattering in high ordered solid nanostructures
Creators: name: Tareeva, M. V.
name: Dravin, V. A.
name: Khmelnitsky, R. A.
name: Tsarik, K. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences
subject: 78-05

description: Stimulated low frequency Raman scattering (SLFRS) in single-crystal diamond films (SCD) with a graphitized layer built-in is investigated. SLFRS process in all studied structures has frequency shift in gigahertz range (5.1-13.2 GHz). Coherent phonon mode excitation at a frequency of several GHz is a result of nonlinear interaction of high-power laser wave with submicron films. SLFRS conversion efficiency and threshold is estimated experimentally. Comparison of the obtained results with data on SLFRS properties in synthetic opal matrixes is made.
description: 9 pages, 3 figures
Melosh rotation: source of the proton's missing spin
Creators: name: Ma, Bo-Qiang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that the observed small value of the integrated spin structure function for protons could be naturally understood within the naive quark model by considering the effect from Melosh rotation. The key to this problem lies in the fact that the deep inelastic process probes the light-cone quarks rather than the instant-form quarks, and that the spin of the proton is the sum of the Melosh rotated light-cone spin of the individual quarks rather than simply the sum of the light-cone spin of the quarks directly.
description: 5 latex pages
Task-Space Impedance Controller Using Dual Quaternion Logarithm
Creators: name: Fonseca, Mariana de Paula Assis
name: Adorno, Bruno Vilhena
name: Fraisse, Philippe
Publisher: name: Zenodo
Year: 2019
Subjects: Impedance Controller
Dual Quaternion

description: This paper proposes a task-space impedance controller using the dual quaternion logarithm, combining the translation and rotation impedance in a single mathematical structure. The controller is composed of an outer loop impedance controller to impose a desired apparent impedance to the robot and an inner motion control loop to ensure trajectory tracking of the end-effector pose. Experiments showing the effectiveness of the controller were run on a KUKA LWR4+ robot with a force/torque sensor in the end-effector.
Interplanetary and Geomagnetic Consequences of Interacting CMEs of 13-14 June 2012
Creators: name: Srivastava, Nandita
name: Mishra, Wageesh
name: Chakrabarty, D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We report on the kinematics of two interacting CMEs observed on 13 and 14 June 2012. Both CMEs originated from the same active region NOAA 11504. After their launches which were separated by several hours, they were observed to interact at a distance of 100 Rs from the Sun. The interaction led to a moderate geomagnetic storm at the Earth with Dst index of approximately, -86 nT. The kinematics of the two CMEs is estimated using data from the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) onboard the Solar Terrestrial Relations Observatory (STEREO). Assuming a head-on collision scenario, we find that the collision is inelastic in nature. Further, the signatures of their interaction are examined using the in situ observations obtained by Wind and the Advance Composition Explorer (ACE) spacecraft. It is also found that this interaction event led to the strongest sudden storm commencement (SSC) (approximately 150 nT) of the present Solar Cycle 24. The SSC was of long duration, approximately 20 hours. The role of interacting CMEs in enhancing the geoeffectiveness is examined.
description: 17 pages, 5 figures, Accepted in Solar Physics Journal
Polarized Neutron Reflectometry Study of Depth Dependent Magnetization Variation in Co Thin Film on a PMN-PT Substrate
Creators: name: Al-Rashid, Md Mamun
name: Grutter, Alexander
name: Kirby, Brian
name: Atulasimha, Jayasimha
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We studied the depth dependent magnetization profile of the magnetostrictive Co thin film layer in a PMN-PT (011)/Ta/Co/Ta structure under both zero and nonzero applied electric field using polarized neutron reflectometry. Application of electric field across the PMN-PT substrate generates a strain, which rotates the magnetization of the Co layer consistent with the Villari effect. At low magnetic fields (near remanence and coercive field conditions), we find that the depth dependent magnetization profile is non-uniform, under both zero and nonzero applied electric fields. These variations are attributable to the depth dependent strain profile in the Co film, as determined by finite element analysis simulations.
Nearest-Neighbor-Based Active Learning for Rare Category Detection
Creators: name: Jingrui  He
name: Carbonell, Jaime G.
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Rare category detection is an open challenge for active learning, especially in the de-novo case (no labeled examples), but of significant practical importance for data mining - e.g. detecting new financial transaction fraud patterns, where normal legitimate transactions dominate. This paper develops a new method for detecting an instance of each minority class via an unsupervised local-density-differential sampling strategy. Essentially a variable-scale nearest neighbor process is used to optimize the probability of sampling tightly-grouped minority classes, subject to a local smoothness assumption of the majority class. Results on both synthetic and real data sets are very positive, detecting each minority class with only a fraction of the actively sampled points required by random sampling and by Pelleg’s Interleave method, the prior best technique in the sparse literature on this topic.
From Principles to Practice with Class in the First Year
Creators: name: Tobin-Hochstadt, Sam
name: Van Horn, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: We propose a bridge between functional and object-oriented programming in the first-year curriculum. Traditionally, curricula that begin with functional programming transition to a professional, usually object-oriented, language in the second course. This transition poses obstacles for students, and often results in confusing the details of development environments, syntax, and libraries with the fundamentals of OO programming that the course should focus on. Instead, we propose to begin the second course with a sequence of custom teaching languages which minimize the transition from the first course, and allow students to focus on core ideas. After working through the sequence of pedagogical languages, we then transition to Java, at which point students have a strong command of the basic principles. We have 3 years of experience with this course, with notable success.
description: In Proceedings TFPIE 2013, arXiv:1312.2216
Quantum Nondemolition Gate Operations and Measurements in Real Time on Fluctuating Signals
Creators: name: Shiozawa, Yu
name: Yoshikawa, Jun-ichi
name: Yokoyama, Shota
name: Kaji, Toshiyuki
name: Makino, Kenzo
name: Serikawa, Takahiro
name: Nakamura, Ryosuke
name: Suzuki, Shigenari
name: Yamazaki, Shota
name: Asavanant, Warit
name: Takeda, Shuntaro
name: van Loock, Peter
name: Furusawa, Akira
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate an optical quantum nondemolition (QND) interaction gate with a bandwidth of about 100 MHz. Employing this gate, we are able to perform QND measurements in real time on randomly fluctuating signals. Our QND gate relies upon linear optics and offline-prepared squeezed states. In contrast to previous demonstrations on narrow sideband modes, our gate is compatible with non-Gaussian quantum states temporally localized in a wave-packet mode, and thus opens the way for universal gate operations and realization of quantum error correction.
N-best Speech Hypotheses Reordering Using Linear Regression
Creators: name: Ananlada  Chotimongkol
name: Rudnicky, Alexander
Publisher: name: Carnegie Mellon University
Year: 2007
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We propose a hypothesis reordering technique to improve speech recognition accuracy in a dialog system. For such systems, additional information external to the decoding process itself is available, in particular features derived from
the parse and the dialog. Such features can be combined with recognizer features by means of a linear regression model to predict the most likely entry in the hypothesis list. We introduce the use of concept error rate as an alternative accuracy measurement and compare it withy the use of word error rate. The proposed model performs better than human subjects performing the same hypothesis reordering task.
title: ADCO, Septième cartulaire de Saint-Étienne de Dijon (1661-1665), Cart. 29 (G 134), 996 folios, f. 0361
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire
subject: Corpus Burgundiae Medii Aevi

description: Septième cartulaire de Saint-Étienne de Dijon (1661-1665), Archives départementales de la Côte-d'Or, Cart. 29 (G 134), 996 folios, f. 0361, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Septième cartulaire de Saint-Étienne de Dijon (1661-1665), Archives départementales de la Côte-d'Or, Cart. 29 (G 134), 996 folios, f. 0361, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Certificates of Exceptional Theoretical and Cognitive Intelligence-Majid Sheikh Gholam Hosseini
Creators: name: Sheikh gholam hosseini, Majid
Publisher: name: Zenodo
Year: 2025
Subjects: Intelligence, IQ 204, TIQ 215, Theoretical Intelligence, Cognitive Science, Philosophical Theory, Theology, Metaphysics, Majid Sheikh Gholam Hosseini, Visionary Architect, Analytical Thinking, Creative Mind

description: This record presents two official certificates awarded to Majid Sheikh Gholam Hosseini, recognizing his exceptionally rare intellectual capabilities in both cognitive and theoretical domains:

 

1. Certificate of Exceptional Theoretical Intelligence (TIQ: 215)

Issued by the Analytical TIQ Evaluation System, this certificate honors a groundbreaking metaphysical-theological theory titled:  

“The Celestial Prison: A Philosophical-Theological Reflection on Earth as a Loving Father’s Hell.”  

With a TIQ score of 215, Majid is ranked among the top 0.000002% of theoretical minds globally. This recognition highlights his deep capacity for philosophical insight, conceptual synthesis, and interdisciplinary innovation.

 

2. Certificate of High Intelligence (IQ: 204)

This certificate confirms a verified IQ score of 204 under registration ID: IQ-CERT-204-MS-GH-2025.  

This score places Majid among the highest echelons of general cognitive ability worldwide.

 

Together, these certificates confirm his position as a visionary philosophical-theological architect, combining spiritual depth with scientific clarity and philosophical precision.

 

This record is legally protected under Creative Commons Attribution License
Transmission of heat modes across a potential barrier
Creators: name: Rosenblatt, Amir
name: Lafont, Fabien
name: Levkivskyi, Ivan
name: Sabo, Ron
name: Gurman, Itamar
name: Banitt, Daniel
name: Heiblum, Moty
name: Umansky, Vladimir
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Controlling the transmission of electrical current using a quantum point contact constriction paved a way to a large variety of experiments in mesoscopic physics. The increasing interest in heat transfer in such systems fosters questions about possible manipulations of quantum heat modes that do not carry net charge(neutral modes). Here, we study the transmission of upstream neutral modes through a quantum point contact in fractional hole-conjugate quantum Hall states. Employing two different measurement techniques, we were able to render the relative spatial distribution of these chargeless modes with their charged counter-parts. In these states, which were found to harbor more than one downstream charge mode, the upstream neutral modes are found to flow with the inner charge mode - as theoretically predicted. These results unveil a universal upstream heat current structure and open the path for more complex engineering of heat flows and cooling mechanisms in quantum nano-electronic devices.
Navigating computer science research through waves of privacy concerns : discussions among computer scientists at Carnegie Mellon University
Creators: name: Sweeney, Latanya
Publisher: name: Carnegie Mellon University
Year: 1992
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "Computer Science research and practice are raising growing privacy concerns among the public and government. Computer technology's increasing ability to capture, organize, interpret and share data about individuals raises questions about what privacy practices computer science researchers should adopt, if any. These issues are already very real in ongoing research projects in the School of Computer Science (SCS) at Carnegie Mellon University, from mining databases of individual transactions, to studying how people use the web, to mounting cameras in lounges, to building hallway robots that capture data about passers by, to building intelligent workstation assistants that learn user habits. This paper introduces the nature of privacy concerns often related to computer science research, explains potential benefits and risks (especially of abuse and misuse) and examines traditional and innovative methods for providing privacy assurances in research. Examples are provided from projects at Carnegie Mellon's School of Computer Science."
How many-body effects modify the van der Waals interaction between graphene sheets
Creators: name: Dobson, John F.
name: Gould, Tim
name: Vignale, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Undoped graphene (Gr) sheets at low temperatures are known, via Random Phase Approximation (RPA) calculations, to exhibit unusual van der Waals (vdW) forces. Here we show that graphene is the first known system where effects beyond the RPA make qualitative changes to the vdW force. For large separations, $D \gtrsim 10$nm where only the $π_z$ vdW forces remain, we find the Gr-Gr vdW interaction is substantially reduced from the RPA prediction. Its $D$ dependence is very sensitive to the form of the long-wavelength many-body enhancement of the velocity of the massless Dirac fermions, and may provide independent confirmation of the latter via direct force measurements.
description: 3 Figures: PACS 73.22.Pr, 71.10.Pm, 61.48.Gh, 34.20.Cf
The Jets of AGN as giant co-axial cables
Creators: name: Gabuzda, Denise C.
name: Nagle, Matt
name: Roche, Naomi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The currents carried by the jets of active galactic nuclei (AGNs) can be probed using maps of the Faraday rotation measure (RM), since a jet current will be accompanied by a toroidal magnetic (B) field, which will give rise to a systematic change in the RM across the jet. The aim of this study is to identify new AGNs displaying statistically significant transverse RM gradients across their parsec-scale jets, and to look for overall patterns in the implied directions for the toroidal B-field components and jet currents. We have carried out new analyses of Faraday RM maps derived from previously published 8.1, 8.4, 12.1 and 15.3 GHz data obtained in 2006 on the NRAO VLBA. In a number of important ways, our procedures were identical to those of the original authors, but several other key aspects of the new imaging and analysis differ from the original methods. Our new analysis has substantially increased the number of AGNs known to display transverse RM gradients. The collected data on parsec and kiloparsec scales indicate that the current typically flows inward along the jet axis and outward in a more extended region surrounding the jet, typical to the current structure of a coaxial cable, accompanied by a self-consistent system of nested helical B fields, whose toroidal components give rise to the observed transverse RM gradients. These new results make it possible for the first time to conclusively demonstrate the existence of a preferred direction for the toroidal B-field components - and therefore of the currents - of AGN jets. Discerning the origin of this current-field system is of cardinal importance for understanding the physical mechanisms leading to the formation of the intrinsic jet B field, which likely plays an important role in the propagation and collimation of the jets; one possibility is the action of a "cosmic battery".
description: 12 pages, 2 figures, 3 tables; accepted for publication in Astronomy & Astrophysics
Additional file 1 of Fibroblast-like synoviocytes-derived exosomal circFTO deteriorates rheumatoid arthritis by enhancing N6-methyladenosine modification of SOX9 in chondrocytes
Creators: name: Li, Guoqing
name: Fang, Yuxuan
name: Xu, Nan
name: Ding, Yimin
name: Liu, Dan
Publisher: name: figshare
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Supplementary Material 1
Revealing Substructure in the Galactic Halo - The SEKBO RR Lyrae Survey
Creators: name: Keller, Stefan C.
name: Murphy, Simon
name: Prior, Sayuri
name: DaCosta, Gary
name: Schmidt, Brian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a search for RR Lyrae variable stars from archival observations of the Southern Edgeworth-Kuiper Belt Object survey. The survey covers 1675 square degrees along the ecliptic to a mean depth of V=19.5, i.e. a heliocentric distance of ~50kpc for RR Lyrae stars. The survey reveals 2016 RR Lyrae candidates. Follow-up photometric monitoring of a subset of these candidates shows (24+/-12)% contamination by non-RR Lyrae variables. We derive a map of over-density of RR Lyraes in the halo that reveals a series of structures coincident with the leading and trailing arms of debris from the Sagittarius dwarf galaxy. One of the regions of over-density is found on the trailing arm, 200 deg. from the main body of the Sagittarius dwarf at a distance of ~45kpc. This distant detection of the stellar population of the outer trailing arm of Sagittarius offers a tight constraint on the motion of the dwarf galaxy. A distinctly separate region of over-density is seen towards the Virgo Over Density.
description: 59 pages, 21 figures. ApJ accepted
Beyond boundaries of redshift surveys: assessing mass fluctuations on "super-survey" scales
Creators: name: Feix, Martin
name: Nusser, Adi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The observed density field in redshift space is directly affected by the radial motions generated from mass fluctuations outside the volume occupied by a given galaxy redshift survey. These motions introduce redshift space anisotropies which are more pronounced at larger distances from the survey's center, thus offering clues to the nature of mass fluctuations on super-survey scales. Furthermore, we note that all estimates of the growth factor derived from redshift space distortions are based on relations which explicitly assume that the velocity field is generated by mass fluctuations inside the survey volume. This may cause uncertainties in these estimates which are on the order of a few percent.
description: 20 pages, 3 figures; added a section on next-generation surveys; accepted version