cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
[Letter from Jean-Baptiste Edouard Bornet]
Creators: name: Bornet, Jean-Baptiste Edouard
Publisher: name: Unknown
Year: 1901
Subjects: Falkenberg, Paul
Solms-Laubach, Henri Herman Maximilian Carl Ludwig Friedrich zu Comte de

description: Has studied Rhodomelaceae from the Ehuret Herbarium with the help of Falkenberg's new monograph.
The Universal Generating Function of Analytical Poisson Structures
Creators: name: Dherin, Benoit
Publisher: name: arXiv
Year: 2005
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The notion of generating functions of Poisson structures was first studied in math.SG/0312380.They are special functions which induce, on open subsets of $\R^d$, a Poisson structure together with the local symplectic groupoid integrating it. A universal generating function was provided in terms of a formal power series coming from Kontsevich star product. The present article proves that this universal generating function converges for analytical Poisson structures and compares the induced local symplectic groupoid with the phase space of Karasev--Maslov.
description: 15 pages, 2 figures, shorter version, introductive part removed
Momentum distribution and condensate fraction of a Fermi gas in the BCS-BEC crossover
Creators: name: Astrakharchik, G. E.
name: Boronat, J.
name: Casulleras, J.
name: Giorgini, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: By using the diffusion Monte Carlo method we calculate the one- and two-body density matrix of an interacting Fermi gas at T=0 in the BCS-BEC crossover. Results for the momentum distribution of the atoms, as obtained from the Fourier transform of the one-body density matrix, are reported as a function of the interaction strength. Off-diagonal long-range order in the system is investigated through the asymptotic behavior of the two-body density matrix. The condensate fraction of fermionic pairs is calculated in the unitary limit and on both sides of the BCS-BEC crossover.
description: 4 pages, 4 figures
EHDEN - D4.7 - Yearly Progress Report on Technical Framework
Creators: name: Speybroeck, Michel Van
name: Moinat, Maxim
name: Reisberg, Sulev
name: Blacketer, Clair
name: Sandijk, Sebastiaan Van
name: Rijnbeek, Peter
name: José-Luis Oliveira
name: Trifan, Alina
Publisher: name: Zenodo
Year: 2020
Subjects: Framework
EHDEN portal
Interoperability
FAIR
Arachne
White Rabbit
Rabbit in a Hat
ETL
Quality Dashboard
Security

description: The EHDEN technical framework comprises the entire set of technical constructs, i.e. applications and their interoperability, including security setup within the context of the EHDEN Project. The scope of the framework covers, as well, components for the centralised functionality such as the EHDEN portal as well as the components which are used in the local mapping of databases and tools for managing of verifying the data quality. While Year 1 he focussed on establishing the architecture and technical foundation, year 2 focused on maturing and provide working solutions for the key components. The EHDEN portal has a better plugin structure, the database catalogue has improved usability features and now contains a plugin-database dashboards- to provide more flexibility in (summarised) database information. This will enable prospective users who want to assess the feasibility of a study concept, to retrieve all relevant information from participating databases - from metadata to data profiling information - from a single place. The enhanced API capability will also ensure that the data catalogue contributes to the FAIRification of the data sources. The new release of Arachne is another step forward in providing a technical solution to fully support the execution of federated studies. On the local side, the updated White Rabbit/Rabbit in a Hat tool, improves its practical usability and makes it the de-facto standard for data profiling and documenting the ETL logic. The full integration of the Data Quality Dashboard solution in the mapping process makes sure that EHDEN employs a fully transparent mechanism to monitor and manage the data quality of mapped data sources.
Anton Baumstarks wissenschaftliches Testament
Creators: name: Baumstark, Reinhold
name: Kaufhold, Hubert
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 82 (1998): Oriens christianus, Band 82
Disordered phase of a two-dimensional Heisenberg Model with S=1
Creators: name: Moukouri, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study an anisotropic version of the $J_1-J_2$ model with S=1. We find a second order transition from a Néel $Q=(π,π)$ phase to a disordered phase with a spin gap.
description: 4 pages, 5 figures
Moulding hydrodynamic 2D-crystals upon parametric Faraday waves in shear-functionalized water surfaces
Creators: name: Kharbedia, Mikheil
name: Caselli, Niccolò
name: López-Menéndez, Horacio
name: Enciso, Eduardo
name: Monroy, Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Faraday waves (FWs), or surface waves oscillating at half of the natural frequency when a liquid is vertically vibrated, are archetypes of ordering transitions on liquid surfaces. The existence of unbounded FW-patterns sustained upon bulk frictional stresses has been evidenced in highly viscous fluids. However, the role of surface rigidity has not been investigated so far. Here, we demonstrate that dynamically frozen FWs that we call 2D-hydrodynamic crystals do appear as ordered patterns of nonlinear surface modes in water surfaces functionalized with soluble (bio)surfactants endowing in-plane shear stiffness. The strong phase coherence in conjunction with the increased surface rigidity bear the FW-ordering transition, upon which the hydrodynamic crystals were reversibly molded by parametric control of their degree of order. Crystal symmetry and unit cell size were tuned depending on the FW-dispersion regime. The hydrodynamic crystals here discovered could be exploited in touchless strategies of soft matter scaffolding. Particularly, the surface-directed synthesis of structured materials based on colloids or polymers and cell culture patterns for tissue engineering could be ameliorated under external control of FW-coherence
A Nearly Massless Graviton in Einstein-Gauss-Bonnet Inflation with Linear Coupling Implies Constant-roll for the Scalar Field
Creators: name: Oikonomou, V. K.
name: Fronimos, F. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The striking GW170817 event indicated that the graviton is nearly massless, since the gamma rays emitted from the two neutron stars merging arrived almost simultaneously with the gravitational waves. Thus, the graviton must also be massless during the inflationary and post-inflationary era, since there is no obvious reason to believe otherwise. In this letter we shall investigate the theoretical implications of the constraint that the graviton is massless to an Einstein-Gauss-Bonnet theory with linear coupling of the scalar field to the four dimensional Gauss-Bonnet invariant. As we show, the constraint of having gravitational wave speed of the primordial gravitational waves equal to one, severely restricts the dynamics of the scalar field, imposing a direct constant-roll evolution on it. Also, as we show, the spectral index of the primordial scalar perturbations for the GW170817-compatible Einstein-Gauss-Bonnet theory with linear coupling is different in comparison to the same theory with non-linear coupling. Thus the phenomenology of the model is expected to be different, and we briefly discuss this issue too. In addition, the constant-roll condition is always related to non-Gaussianities, thus it is interesting that the imposition of a massless graviton in an Einstein-Gauss-Bonnet theory with linear coupling may lead to non-Gaussianities, so we briefly discuss this issue too.
description: EPL Accepted
A Bi-Hamiltonian Structure for the Integrable, Discrete Non-Linear Schrodinger System
Creators: name: Ercolani, Nicholas M.
name: Lozano, Guadalupe I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Symplectic Geometry (math.SG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37K10, 37K60, 37K25, 53D17

description: This paper shows that the Ablowitz-Ladik hierarchy of equations (a well-known integrable discretization of the Non-linear Schrodinger system) can be explicitly viewed as a hierarchy of commuting flows which: (a) are Hamiltonian with respect to both a standard, local Poisson operator J and a new non-local, skew, almost Poisson operator K, on the appropriate space; (b) can be recursively generated from a recursion operator R (obtained by composing K and the inverse of J.) In addition, the proof of these facts relies upon two new pivotal resolvent identities which suggest a general method for uncovering bi-Hamiltonian structures for other families of discrete, integrable equations.
description: 33 pages
Charge noise and overdrive errors in reflectometry-based charge, spin and Majorana qubit readout
Creators: name: Maman, Vahid Derakhshan
name: Gonzalez-Zalba, M. F.
name: Pályi, András
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Solid-state qubits incorporating quantum dots can be read out by gate reflectometry. Here, we theoretically describe physical mechanisms that render such reflectometry-based readout schemes imperfect. We discuss charge qubits, singlet-triplet spin qubits, and Majorana qubits. In our model, we account for readout errors due to slow charge noise, and due to overdriving, when a too strong probe is causing errors. A key result is that for charge and spin qubits, the readout fidelity saturates at large probe strengths, whereas for Majorana qubits, there is an optimal probe strength which provides a maximized readout fidelity. We also point out the existence of severe readout errors appearing in a resonance-like fashion as the pulse strength is increased, and show that these errors are related to probe-induced multi-photon transitions. Besides providing practical guidelines toward optimized readout, our study might also inspire ways to use gate reflectometry for device characterization.
description: 10+3 pages, 5+1 figures
EHDEN - D5.2 - Report on Quality Assurance and Control Procedures
Creators: name: Blacketer, Clair
name: Rijnbeek, Peter
name: Kallfelz, Michael
Publisher: name: Zenodo
Year: 2021
Subjects: Quality
Control
Source data
OMOP
Harmonisation
HADES

description: This report provides an overview of the quality assurance and control procedures for the data workflow from source data to reliable evidence that have been developed and are being implemented in the EHDEN eco-system. The focus is on the quality control mechanisms for the mapping of the source data to the CDM by the data partners and certified Small to Medium-sized Enterprises (SMEs). It is highly important that these mappings are done using a fully transparent approach. To trust in the evidence generated there must be assurance that each step in the pipeline has been evaluated and examined. In this document we walk through how source data is transformed to the CDM, describing the tools employed along the way and how they contribute to the overall quality assurance of the data. In addition, we briefly share insight on the quality control procedures of the analytical step taking the Health Analytics Data-to-Evidence Suite (HADES) as an example. This work is part of Task 5.1 “Implementation of Quality Assurance and Control Procedures” which runs till the end of the project. We will use the learnings from all WPs in the remainder of the project to further extend the procedures and tools discussed in the current deliverable.
A numerical study of gravity driven instability in strongly coupled dusty plasmas.Part I: Rayleigh-Taylor instability and Buoyancy-driven instability
Creators: name: Dharodi, Vikram S.
name: Das, Amita
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Rayleigh-Taylor and Buoyancy-driven instabilities are very common instabilities for an inhomogeneous medium. We examine here how these instabilities grow for incompressible viscoelastic fluids like a strongly coupled dusty plasma by using incompressible generalized hydrodynamic (i-GHD) fluid model. Since the dust particles are pretty massive, the gravitational attraction of earth has a significant role in its dynamics. In this paper the acceleration due to gravity g and the role of strong coupling in the context of gravitationally stratified dusty plasma fluid have been considered. We find that the appearance of elasticity speed up the growth of viscoelastic RT instability by reducing the effect of viscosity at timescales shorter than the Maxwell relaxation time ${τ_m}$. The buoyancy driven situation with spatially localized (in both dimensions) of low/high density regions placed in a background medium has also been evolved in the presence of gravity. Our studies show that both the instabilities get suppressed with increasing coupling strength of the medium. This suppression has been illustrated analytically as well as by carrying out a two-dimensional fully nonlinear simulation.
How to Test for Diagonalizability: The Discretized PT-Invariant Square-Well Potential
Creators: name: Weigert, Stefan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given a non-hermitean matrix M, the structure of its minimal polynomial encodes whether M is diagonalizable or not. This note will explain how to determine the minimal polynomial of a matrix without going through its characteristic polynomial. The approach is applied to a quantum mechanical particle moving in a square well under the influence of a piece-wise constant PT-symmetric potential. Upon discretizing the configuration space, the system is decribed by a matrix of dimension three. It turns out not to be diagonalizable for a critical strength of the interaction, also indicated by the transition of two real into a pair of complex energy eigenvalues. The systems develops a three-fold degenerate eigenvalue, and two of the three eigenfunctions disappear at this exceptional point, giving a difference between the algebraic and geometric multiplicity of the eigenvalue equal to two.
description: 5 pages
Accelerating reinforcement learning through imitation
Creators: name: Price, Robert Roy
Publisher: name: University of British Columbia
Year: 2009

description: Imitation can be viewed as a means of enhancing learning in multiagent environments. It augments an agent's ability to learn useful behaviours by making intelligent use of the knowledge implicit in behaviors demonstrated by cooperative teachers or other more experienced agents. Using reinforcement learning theory, we construct a new, formal framework for imitation that permits agents to combine prior knowledge, learned knowledge and knowledge extracted from observations of other agents. This framework, which we call implicit imitation, uses observations of other agents to provide an observer agent with information about its action capabilities in unexperienced situations. Efficient algorithms are derived from this framework for agents with both similar and dissimilar action capabilities and a series of experiments demonstrate that implicit imitation can dramatically accelerate reinforcement learning in certain cases. Further experiments demonstrate that the framework can handle transfer between agents with different reward structures, learning from multiple mentors, and selecting relevant portions of examples. A Bayesian version of implicit imitation is then derived and several experiments are used to illustrate how it smoothly integrates model extraction with prior knowledge and optimal exploration. Initial work is also presented to illustrate how extensions to implicit imitation can be derived for continuous domains, partially observable environments and multi-agent Markov games. The derivation of algorithms and experimental results are supplemented with an analysis of relevant domain features for imitating agents and some performance metrics for predicting imitation gains are suggested.
Sustainable Development of Enhanced Luminescence Polymer-Carbon Dots Composite Film for Rapid Cd2+ Removal from Wastewater
Creators: name: Issa, Mohammed Abdullah
Publisher: name: figshare
Year: 2020
Subjects: subject: 100708 Nanomaterials
subject: FOS: Nanotechnology

description: As a remedy for environmental pollution, a versatile synthetic approach has been developed to prepare polyvinyl alcohol (PVA)/nitrogen-doped carbon dots (CDs) composite film (PVA-CDs) for removal of toxic cadmium ions. The CDs were first synthesized using carboxymethylcellulose (CMC) of oil palms empty fruit bunch wastes with the addition of polyethyleneimine (PEI) and then the CDs were embedded with PVA. The PVA-CDs film possess synergistic functionalities through increasing the content of hydrogen bonds for chemisorption compared to the pure CDs. Optical analysis of PVA-CDs film was performed by ultraviolet-visible and fluorescence spectroscopy. Compared to the pure CDs, the solid-state PVA-CDs displayed a bright blue color with a quantum yield (QY) of 47%; they possess excitation-independent emission and a higher Cd2+ removal efficiency of 91.1%. The equilibrium state was achieved within 10 min. It was found that adsorption data fit well with the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption uptake was 113.6 mg g−1 at an optimal pH of 7. Desorption experiments showhe that adsorbent can be reused fruitfully for five adsorption-desorption cycles using 0.1 HCl elution. The film was successfully applied to real water samples with a removal efficiency of 95.34% and 90.9% for tap and drinking water, respectively. The fabricated membrane is biodegradable and its preparation follows an ecofriendly green route. View Full-Text
Nanoelectromechanical Sensors based on Suspended 2D Materials
Creators: name: Lemme, Max C.
name: Wagner, Stefan
name: Lee, Kangho
name: Fan, Xuge
name: Verbiest, Gerard J.
name: Wittmann, Sebastian
name: Lukas, Sebastian
name: Dolleman, Robin J.
name: Niklaus, Frank
name: van der Zant, Herre S. J.
name: Duesberg, Georg S.
name: Steeneken, Peter G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The unique properties and atomic thickness of two-dimensional (2D) materials enable smaller and better nanoelectromechanical sensors with novel functionalities. During the last decade, many studies have successfully shown the feasibility of using suspended membranes of 2D materials in pressure sensors, microphones, accelerometers, and mass and gas sensors. In this review, we explain the different sensing concepts and give an overview of the relevant material properties, fabrication routes, and device operation principles. Finally, we discuss sensor readout and integration methods and provide comparisons against the state of the art to show both the challenges and promises of 2D material-based nanoelectromechanical sensing.
description: Review paper
Sharp gene pool transition in a population affected by phenotype-based selective hunting
Creators: name: Brigatti, E.
name: Martins, J. S. Sa'
name: Roditi, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We use a microscopic model of population dynamics, a modified version of the well known Penna model, to study some aspects of microevolution. This research is motivated by recent reports on the effect of selective hunting on the gene pool of bighorn sheep living in the Ram Mountain region, in Canada. Our model finds a sharp transition in the structure of the gene pool as some threshold for the number of animals hunted is reached.
description: 5 pages, 4 figures
Infrared Properties of Star Forming Dwarf Galaxies: Blue Compact Dwarfs in the Virgo Cluster
Creators: name: Vaduvescu, O.
name: Richer, M. G.
name: McCall, M. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A sample of 16 blue compact dwarf galaxies (BCDs) in the Virgo Cluster has been imaged in the near-infrared (NIR) in $J$ and $K_s$ on the 2.1m telescope at OAN-SPM in Mexico. Isophotes as faint as $μ_J$ = 24 mag arcsec$^{-2}$ and $μ_{K_s}$ = 23 mag arcsec$^{-2}$ have been reached in most of the targets. Surface brightness profiles can be fitted across the whole range of radii by the sum of two components: a hyperbolic secant (sech) function, which is known to fit the light profiles of dIs, and a Gaussian component, which quantifies the starburst near the centre. Isophotal and total fitted NIR magnitudes have been calculated, along with semimajor axes at $μ_J$ = 23 mag arcsec$^{-2}$ and $μ_{K_s}$ = 22 mag arcsec$^{-2}$. The diffuse underlying component and the young starburst have been quantified using the profile fitting. Most color profiles show a constant color, between $J-K_s$=0.7 to 0.9 mag. The diffuse component represents the overwhelming majority of the NIR light for most BCDs, the starburst enhancing the flux by less than about 0.3 mag. Linear correlations were found between the sech scale length and the sech magnitude, and between the sech semimajor axis and the sech magnitude. Overall, galaxies with more luminous diffuse components are larger and brighter in the centre. The central burst correlates with the diffuse component, with brighter BCDs having stronger star-bursts, suggesting that more massive objects are forming stars more efficiently. BCDs lie on the ``fundamental plane'' defined by dwarf irregulars (dISs) in Paper I, following the same relation between sech absolute magnitude, sech central surface brightness, and the hydrogen line-width $W_{20}$, although the scatter is larger than for the dIs. [one sentence cut]
description: Accepted in AJ
Manifestations of classical size effect and electronic viscosity in the magnetoresistance of narrow two-dimensional conductors: Theory and experiment
Creators: name: Raichev, O. E.
name: Gusev, G. M.
name: Levin, A. D.
name: Bakarov, A. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a classical kinetic theory of magnetotransport of 2D electrons in narrow channels with partly diffusive boundary scattering and apply it to description of magnetoresistance measured in the temperature interval 4.2-30 K in long mesoscopic bars fabricated from high-purity GaAs quantum well structures. Both experiment and theory demonstrate a number of characteristic features in the longitudinal and Hall resistances caused by the size effect in two dimensions owing to the high ballisticity of the transport. In addition to the features described previously, we also reveal a change in the slope of the first derivative of magnetoresistance when the cyclotron orbit diameter equals to half of the channel width. These features are suppressed with increasing temperature as a result of the electronic viscosity due to electron-electron interaction. By comparing theory and experiment, we determine the characteristic time of relaxation of angular distribution of electrons caused by electron-electron scattering.
How fair can we go in machine learning? Assessing the boundaries of fairness in decision trees
Creators: name: Valdivia, Ana
name: Sánchez-Monedero, Javier
name: Casillas, Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Fair machine learning works have been focusing on the development of equitable algorithms that address discrimination of certain groups. Yet, many of these fairness-aware approaches aim to obtain a unique solution to the problem, which leads to a poor understanding of the statistical limits of bias mitigation interventions. We present the first methodology that allows to explore those limits within a multi-objective framework that seeks to optimize any measure of accuracy and fairness and provides a Pareto front with the best feasible solutions. In this work, we focus our study on decision tree classifiers since they are widely accepted in machine learning, are easy to interpret and can deal with non-numerical information naturally. We conclude experimentally that our method can optimize decision tree models by being fairer with a small cost of the classification error. We believe that our contribution will help stakeholders of sociotechnical systems to assess how far they can go being fair and accurate, thus serving in the support of enhanced decision making where machine learning is used.
Planar Yang-Mills 101.pdf
Creators: name: R. Wright, Nicholas
name: Steinert Wright, Nicholas R.
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 510299
subject: Atomic, molecular and optical physics not elsewhere classified
classificationCode: 510399
subject: Classical physics not elsewhere classified
classificationCode: 510499
subject: Condensed matter physics not elsewhere classified
classificationCode: 510801
subject: Degenerate quantum gases and atom optics
classificationCode: 510702
subject: Field theory and string theory
classificationCode: 510105
subject: General relativity and gravitational waves
classificationCode: 510601
subject: Nuclear physics
classificationCode: 510703
subject: Particle physics
classificationCode: 510602
subject: Plasma physics; fusion plasmas; electrical discharges
classificationCode: 510803
subject: Quantum information, computation and communication
classificationCode: 510802
subject: Foundations of quantum mechanics
classificationCode: 510899
subject: Quantum physics not elsewhere classified
classificationCode: 510199
subject: Astronomical sciences not elsewhere classified

description: The point is to define the
limiting continuum field theory. In principle, this might even be done without
taking limits. The Hamiltonian, the operator on the quantum Hilbert space which
generates time translations, has a square root called the supercharge. Here we
use the Moon model and Parfait logic. Furthermore, although one has changed the
problem, one still has a fairly close relation to the original problem using
the ideology of the renormalization group. We can start with a supersymmetric
theory, and add supersymmetry breaking terms to the action which only become
important at long distances as many lattice spacings, to obtain a theory with
the better renormalization properties of the supersymmetric theory at short
distances, but which reduces to conventional Yang-Mills theory at longer
distances. Thus, a solution to the problem in a sufficiently general class of
supersymmetric theories, would in fact imply the solution of the original
problem. We propose a Cacace tetraoxygen
universe relative to a Poincaré Dodecahedral Space. This is called an oxozone.
Big-Bang Nucleosynthesis with Unstable Gravitino and Upper Bound on the Reheating Temperature
Creators: name: Kohri, Kazunori
name: Moroi, Takeo
name: Yotsuyanagi, Akira
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the effects of the unstable gravitino on the big-bang nucleosynthesis. If the gravitino mass is smaller than \sim 10 TeV, primordial gravitinos produced after the inflation are likely to decay after the big-bang nucleosynthesis starts, and the light element abundances may be significantly affected by the hadro- and photo-dissociation processes as well as by the p n conversion process. We calculate the light element abundances and derived upper bound on the reheating temperature after the inflation. In our analysis, we calculate the decay parameters of the gravitino (i.e., lifetime and branching ratios) in detail. In addition, we performed a systematic study of the hadron spectrum produced by the gravitino decay, taking account of all the hadrons produced by the decay products of the gravitino (including the daughter superparticles). We discuss the model-dependence of the upper bound on the reheating temperature.
description: 32 pages, 11 figures
Effect of external electromagnetic radiation on the anomalous metallic behaviors in Ta thin films
Creators: name: Shin, Junghyun
name: Park, Sungyu
name: Kim, Eunseong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigated transport characteristics of superconducting Ta thin films with three configurations in rf radiation filters; no filter, only room-temperature filters, and low-temperature filters in addition to room-temperature filters. The transport properties near the transition temperature are strongly dependent on whether the room-temperature filter is installed or not. The entire transition is shifted to higher temperature with loading layers of the room-temperature filters. Once the zero-resistance state is achieved at B=0, no strong radiation effect is observed even with low-temperature filters installed. When magnetic field is turned on, the nonzero-resistance saturation at low temperatures is revealed without low-temperature filters, which has been considered to be magnetic-field-induced quantum metallic phase. However, the insertion of the additional low-temperature filter weakens the saturation of the resistance, the signature of the metallic behavior. This observation suggests that the previously reported anomalous metallic state in Ta films is mainly induced by the unfiltered radiation and, thus, the intrinsic metallic ground state should be limited to the narrow range of magnetic fields near the critical point, if exists.
description: 13 pages, 7 figures
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1901
Subjects: Heydrich, Franz
Reinbold, Karl August Theodor

description: She has received the specimens from Heydrich, as requested but, he has forbidden her to give it to anyone else. Will forward Heydrich's paper on the fructification of Sphaeranthera. The paper on the fertilisation of the tetraspores is the height of all nonsense Heydrich has ever written. Advises him to pass Heydrich over in silence and not answer him; let your coming, beautiful book be your answer.
Planar Yang-Mills 101.pdf
Creators: name: R. Wright, Nicholas
name: Steinert Wright, Nicholas R.
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 510299
subject: Atomic, molecular and optical physics not elsewhere classified
classificationCode: 510399
subject: Classical physics not elsewhere classified
classificationCode: 510499
subject: Condensed matter physics not elsewhere classified
classificationCode: 510801
subject: Degenerate quantum gases and atom optics
classificationCode: 510702
subject: Field theory and string theory
classificationCode: 510105
subject: General relativity and gravitational waves
classificationCode: 510601
subject: Nuclear physics
classificationCode: 510703
subject: Particle physics
classificationCode: 510602
subject: Plasma physics; fusion plasmas; electrical discharges
classificationCode: 510803
subject: Quantum information, computation and communication
classificationCode: 510802
subject: Foundations of quantum mechanics
classificationCode: 510899
subject: Quantum physics not elsewhere classified
classificationCode: 510199
subject: Astronomical sciences not elsewhere classified

description: The point is to define the
limiting continuum field theory. In principle, this might even be done without
taking limits. The Hamiltonian, the operator on the quantum Hilbert space which
generates time translations, has a square root called the supercharge. Here we
use the Moon model and Parfait logic. Furthermore, although one has changed the
problem, one still has a fairly close relation to the original problem using
the ideology of the renormalization group. We can start with a supersymmetric
theory, and add supersymmetry breaking terms to the action which only become
important at long distances as many lattice spacings, to obtain a theory with
the better renormalization properties of the supersymmetric theory at short
distances, but which reduces to conventional Yang-Mills theory at longer
distances. Thus, a solution to the problem in a sufficiently general class of
supersymmetric theories, would in fact imply the solution of the original
problem. We propose a Cacace tetraoxygen
universe relative to a Poincaré Dodecahedral Space. This is called an oxozone.
Kac-Moody algebras and the cosmological constant
Creators: name: West, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the theory of gravity constructed from the non-linear realisation of the semi-direct product of the Kac-Moody algebra A1+++ with its vector representation does not allow a cosmological constant. The existence of a cosmological constant in this theory is related to the breaking of the gravitational duality symmetry.
The Vortex Phase Qubit: Generating Arbitrary, Counter-Rotating, Coherent Superpositions in Bose-Einstein Condensates via Optical Angular Momentum Beams
Creators: name: Kapale, Kishore T.
name: Dowling, Jonathan P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme for generation of arbitrary coherent superposition of vortex states in Bose-Einstein condensates (BEC) using the orbital angular momentum (OAM) states of light. We devise a scheme to generate coherent superpositions of two counter-rotating OAM states of light using known experimental techniques. We show that a specially designed Raman scheme allows transfer of the optical vortex superposition state onto an initially non-rotating BEC. This creates an arbitrary and coherent superposition of a vortex and anti-vortex pair in the BEC. The ideas presented here could be extended to generate entangled vortex states, design memories for the OAM states of light, and perform other quantum information tasks. Applications to inertial sensing are also discussed.
description: 4 pages, 4 figures, Revtex4, to be submitted to Phys. Rev. Lett
Perturbations of the Quintom Models of Dark Energy and the Effects on Observations
Creators: name: Zhao, Gong-Bo
name: Xia, Jun-Qing
name: Li, Mingzhe
name: Feng, Bo
name: Zhang, Xinmin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study in this paper the perturbations of the quintom dark energy model and the effects of quintom perturbations on the current observations. Quintom describes a scenario of dark energy where the equation of state gets across the cosmological constant boundary $w = -1$ during evolution. We present a new method to show that the conventional dark energy models based on single k-essence field and perfect fluid cannot act as quintom due to the singularities and classical instabilities of perturbations around $w = -1$. One needs to add extra degrees of freedom for successful quintom model buildings. There are no singularities or classical instabilities in perturbations of realistic quintom models and they are potentially distinguishable from the cosmological constant. Basing on the realistic quintom models in this paper we provide one way to include the perturbations for dark energy models with parametrized equation of state across -1. Compare with those assuming no dark energy perturbations, we find that the parameter space which allows the equation of state to get across -1 will be enlarged in general when including the perturbations.
description: Updated version in press in PRD
Anti-charmed pentaquark from B decays
Creators: name: Lee, Su Houng
name: Kwon, Youngshin
name: Kwon, Youngjoon
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We explore the possibility of observing the anti-charmed pentaquark state from the $Θ_c \bar{n} π^+$ decay of $B$ meson produced at $B$-factory experiments. We first show that the observed branching ratio of the $B^+$ to $ Λ^-_c p π^+$, as well as its open histograms, can be remarkably well explained by assuming that the decay proceeds first through the $π^+ \bar{D}^0$ (or $\bar{D}^{*0}$) decay, whose branching ratios are known, and then through the subsequent decay of the virtual $\bar{D}^0$ or $\bar{D}^{*0}$ mesons to $Λ_c^- p$, whose strength are calculated using previously fit hadronic parameters. We then note that the $Θ_c$ can be similarly produced when the virtual $\bar{D}^0$ or $\bar{D}^{*0}$ decay into an anti-nucleon and a $Θ_c$. Combining the present theoretical estimates for the ratio $g_{D N Λ_c} / g_{D N Θ_c} \sim 13 $ and $g_{D^* N Θ_c} \sim {1/3} g_{D N Θ_c}$, we find that the anti-charmed pentaquark $Θ_c$, which was predicted to be bound by several model calculations, can be produced via $B^+ \to Θ_c \bar{n} π^+$, and be observed from the $B$-factory experiments through the weak decay of $Θ_c \to p K^+ π^- π^- $.
description: 4 pages, 4 figures, Revised version to be published in Physical Review Letters
Electronic Transport Properties of Pentacene Single Crystals upon Exposure to Air
Creators: name: Jurchescu, Oana D.
name: Baas, Jacob
name: Palstra, Thomas T. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report the effect of air exposure on the electronic properties of pentacene single crystals. Air can diffuse reversibly in and out of the crystals and controls the physical properties. We discern two competing mechanisms that modulate the electronic transport. The presence of oxygen increases the hole conduction, as in dark four O2 molecules introduce one charge carrier. This effect is enhanced by the presence of visible light. Contrarily, water, present in ambient air, is incorporated in the crystal lattice and forms trapping sites for injected charges.
description: 16 pages, 3 figures
Fast mapping in adults with DLD (McGregor et al., 2020)
Creators: name: McGregor, Karla K.
name: Eden, Nichole
name: Arbisi-Kelm, Timothy
name: Oleson, Jacob
Publisher: name: ASHA journals
Year: 2020
Subjects: Language

description: Purpose: The aim of the study was to determine the integrity of fast mapping among adults with developmental language disorder (DLD).Method: Forty-eight adults with DLD or typical language development (TD) were presented with 24 novel words and photos of their unfamiliar referents from the semantic categories of mammal, bird, fruit, or insect in two conditions. In the fast-mapping condition, 12 of the 24 unfamiliar referents were presented, one at a time alongside a familiar referent (e.g., a dog) and a question (e.g., Is the tail of the torato up?). In the explicit-encoding condition, the other 12 unfamiliar referents were presented alone, one at a time, with a label (e.g., This is a spimer). Immediately after exposure (T1) and again after a 1-day interval (T2), memory for the word-to-exemplar link was measured with a three-alternative forced-choice test, requiring the participant to match a spoken word to one of three pictured referents from the training set. At T2, memory for semantic category information was measured with a four-alternative forced-choice test, requiring the participant to match a spoken word to one of four prototypical silhouettes representing each of the semantic categories.Results: Performance on word-to-exemplar link recognition was stronger for words learned in the explicit-encoding than the fast-mapping condition and stronger for the TD group than the DLD group. Time was not a significant factor as both groups maintained posttraining levels of performance after a 1-day retention interval. Performance on semantic category recognition was stronger for words learned in the explicit-encoding than the fast-mapping condition and stronger for the TD group than the DLD group. The lower category recognition performance of the DLD group was related to their lower nonverbal IQ scores.Conclusion: Contexts that allow for explicit encoding yield better learning of word-to-referent links than contexts that allow for fast mapping in both stronger and weaker learners. Adults with DLD have difficulty learning the link between words and referents, whether trained via fast mapping or explicit encoding and whether tested with exemplar or category referents. Retention is a relative strength for adults with DLD.
Supplemental Material S1. Stimuli grouped by set.
Supplemental Material S2. Lexical integration.
McGregor, K. K., Eden, N., Arbisi-Kelm, T., & Oleson, J. (2020). The fast-mapping abilities of adults with developmental language disorder. Journal of Speech, Language, and Hearing Research. Advance online publication. https://doi.org/10.1044/2020_JSLHR-19-00418
The periods of the intermediate polar RX J0153.3+7446
Creators: name: Norton, A. J.
name: Tanner, J. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first optical photometry of the counterpart to the candidate intermediate polar RX J0153.3+7446. This reveals an optical pulse period of 2333s +/- 5s. Reanalysis of the previously published ROSAT X-ray data reveals that the true X-ray pulse period is probably 1974s +/- 30s, rather than the 1414 s previously reported. Given that the previously noted orbital period of the system is 3.94 h, we are able to identify the X-ray pulse period with the white dwarf spin period and the optical pulse period with the rotation period of the white dwarf in the binary reference frame, as commonly seen in other intermediate polars. We thus confirm that RX J0153.3+7446 is indeed a typical intermediate polar.
description: 4 pages, submitted to A&A Letters
EHDEN - D2.6 - Workshop for HTA and payer community: demonstrate the OMOP-CDM for generating meaningful HTA + payer evidence
Creators: name: Lamb, Alan
name: Bouvy, Jacoline
name: Alhambra, Dani Prieto
name: Rijnbeek, Peter
name: Rozenbaum, Mark
name: Hughes, Nigel
name: Jónsson, Páll
Publisher: name: Zenodo
Year: 2021
Subjects: Outcome Driven
HTA
Payer
OMOP
Policy

description: Health technology assessment (HTA) is widely used throughout Europe and elsewhere to make decisions about the reimbursement and/or pricing of healthcare technologies including new medicines. Several countries require evidence on cost-effectiveness and budget impact and so estimates of healthcare use and costs are important. This poses challenges to companies generating such evidence in support of their products from multiple countries and datasets. EHDEN is a federated network of data sources mapping to the OMOP common data model (OMOP-CDM). This has the potential to facilitate companies in generating high quality real word evidence by improving the interoperability of data and support the application of common analytical code across databases from different countries. Such evidence may be valuable to the HTA community when making reimbursement decisions.
 We organised a virtual, half-day workshop titled ‘Federated data networks and health technology assessment’ to introduce EHDEN and the OMOP-CDM and its use to generate real world evidence (RWE) to HTA bodies. This involved the presentation of regulatory and early HTA use cases. We also asked attendees for feedback on where they saw the potential for the use of OMOP-CDM and EHDEN in HTA settings and which areas and applications they felt EHDEN should prioritise in the next year. In general, HTA bodies see RWE as complementary to clinical trial evidence and were particularly interested in areas where clinical trial evidence may be unavailable or limited, such as rare diseases and medical devices. They also would value RWE which supports challenging areas in HTA, such as assessment of advanced therapy medicinal products (ATMPs) and providing evidence to support outcome-based managed entry arrangements. The need for transparently reported, high quality RWE studies was also emphasised.
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1901

description: Information about the names of the new species to be published by Heydrich as Lithothamnion hermaphroditum, L. orthoblastum and L. cerebellioides. Can not find any reason for the name of Lithophyllum cystosirae. Hauck has found it at Trieste and cannot have described it in: Beiträge zur Kenntnis der Adriatisches Algen.
Profiling the Brane Drain in a Nonsupersymmetric Orbifold
Creators: name: Moore, Gregory
name: Parnachev, Andrei
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study D-branes in a nonsupersymmetric orbifold of type C^2/Γ, perturbed by a tachyon condensate, using a gauged linear sigma model. The RG flow has both higgs and coulomb branches, and each branch supports different branes. The coulomb branch branes account for the ``brane drain'' from the higgs branch, but their precise relation to fractional branes has hitherto been unknown. Building on the results of hep-th/0403016 we construct, in detail, the map between fractional branes and the coulomb/higgs branch branes for two examples in the type 0 theory. This map depends on the phase of the tachyon condensate in a surprising and intricate way. In the mirror Landau-Ginzburg picture the dependence on the tachyon phase is manifested by discontinuous changes in the shape of the D-brane.
description: 57 pages, 17 color figures; harvmac
Composite Dark Matter and a horizontal symmetry
Creators: name: Carvunis, Alexandre
name: Guadagnoli, Diego
name: Reboud, Meril
name: Stangl, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a model of composite Dark Matter (DM), in which a new QCD-like confining "hypercolor" sector generates naturally stable hyperbaryons as DM candidates and at the same time provides mass to new weakly coupled gauge bosons $H$ that serve as DM mediators, coupling the hyperbaryons to the Standard Model (SM) fermions. By an appropriate choice of the $H$ gauge symmetry as a horizontal $SU(2)_h$ SM flavor symmetry, we show how the $H$ gauge bosons can be identified with the horizontal gauge bosons recently put forward as an explanation for discrepancies in rare $B$-meson decays. We find that the mass scale of the $H$ gauge bosons suggested by the DM phenomenology intriguingly agrees with the one needed to explain the rare $B$-decay discrepancies.
description: 24 pages, 1 figure, 2 tables
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1901

description: Grateful for receiving the paper, “Three new Lithothamnia”. Has sent a copy to Heydrich. Has received a very rude reply from Heydrich after telling him that our L. reinboldii was identical to his L. cerebellioides, and has decided not to have anything more to do with Heydrich.