cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
British Educational Research Association Annual Conference 2023 - "Practitioner perspectives of the quality of use of research evidence in education"
Creators: name: Gleeson, Jo
name: Walsh, Lucas
name: Rickinson, Mark
name: Cutler, Blake
name: Hall, Genevieve
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 390307
subject: Teacher education and professional development of educators
classificationCode: 390305
subject: Professional education and training
classificationCode: 390403
subject: Educational administration, management and leadership

description: Internationally, there are widespread efforts to improve the use of research across many sectors, including education (e.g., Révai, 2022). Alongside increasing investments in system initiatives and infrastructure intended to connect research and practice, important questions arise about two issues within the research use literature: firstly, a lack of work on ‘quality of use’ as distinct from quality of evidence; and secondly, a lack of research use models based on practitioner, as opposed to researcher, perspectives.Paper abstract and presentation for the British Educational Research Association (BERA) Annual Conference 2023. Access the abstract submission document.
AGN Feedback Causes Downsizing
Creators: name: Scannapieco, Evan
name: Silk, Joseph
name: Bouwens, Rychard
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the impact of outflows driven by active galactic nuclei (AGN) on galaxy formation. Outflows move into the surrounding intergalactic medium (IGM) and heat it sufficiently to prevent it from condensing onto galaxies. In the dense, high-redshift IGM, such feedback requires highly energetic outflows, driven by a large AGN. However, in the more tenuous low-redshift IGM, equivalently strong feedback can be achieved by less energetic winds (and thus smaller galaxies). Using a simple analytic model, we show that this leads to the anti-hierarchical quenching of star-formation in large galaxies, consistent with current observations. At redshifts prior to the formation of large AGN, galaxy formation is hierarchical and follows the growth of dark-matter halos. The transition between the two regimes lies at the z ~ 2 peak of AGN activity.
description: 6 pages, 2 figures, ApJL in press
Determinant solution for the Totally Asymmetric Exclusion Process with parallel update
Creators: name: Povolotsky, A. M.
name: Priezzhev, V. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the totally asymmetric exclusion process in discrete time with the parallel update. Constructing an appropriate transformation of the evolution operator, we reduce the problem to that solvable by the Bethe ansatz. The non-stationary solution of the master equation for the infinite 1D lattice is obtained in a determinant form. Using a modified combinatorial treatment of the Bethe ansatz, we give an alternative derivation of the resulting determinant expression.
description: 34 pages, 5 figures, final version
Finite-dimensional algebras and quivers
Creators: name: Savage, Alistair
Publisher: name: arXiv
Year: 2005
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16G20, 16-02

description: This is an overview article on finite-dimensional algebras and quivers, written for the Encyclopedia of Mathematical Physics. We cover path algebras, Ringel-Hall algebras and the quiver varieties of Lusztig and Nakajima.
description: 9 pages, 7 figures
Reversibility and Irreversibility within the Quantum Formalism
Creators: name: Jacobs, Tim
name: Maes, Christian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The discussion on time-reversal in quantum mechanics exists at least since Wigner's ``Uber die Operation der Zeitumkehr in der Quantenmechanik'' paper in 1932. If and how the dynamics of the quantum world is time-reversible has been the subject of many controversies. Some have seen quantum mechanics as fundamentally time-irreversible, see for example von Neumann, and some have seen in that the ultimate cause of time's arrow and second law behavior. In his best-selling book ``The Emperor's New Mind'', Roger Penrose argues similarly and concludes that ``our sought-for quantum gravity must be a time-asymmetric theory'' [p.351]. Not so long ago, we read yet about another project in Physicalia 26: to extend quantum mechanics into new fundamentally irreversible equations, thus proposing a new theory giving ``... une description fondamentale irreversible de tout systeme physique''.
description: 16 pages
Surface Josephson plasma waves in a high-temperature superconductor
Creators: name: Lu, Q.
name: Bollinger, A. T.
name: He, X.
name: Sundling, R.
name: Bozovic, I.
name: Gozar, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electron density oscillations with acoustic dispersions and sustained at boundaries between different media provide information about surface and interface properties of hetero-structures. In ultra-thin metallic films these plasmonic excitations are heavily damped. Superconductivity is predicted to reduce dissipation allowing detection of these resonances. Emerging low-loss interface Cooper-pair waves have been studied before, however, the observation of surface-confined Josephson plasmons has remained elusive. Here, we report on generation and coupling to these excitations in an ultrathin single-crystal film of high-temperature superconductor La1.85Sr0.15CuO4. The film becomes brighter than Au below the critical temperature when probed with sub-gap THz photons. We show that the enhanced signal in the superconducting state, which can be visualized with a spatial resolution better than λ/3,000, originates from near-field coupling of light to surface Josephson plasmons. Our results open a path towards non-invasive investigation of enhanced superconductivity in artificial multilayers, buried interface states in topological hetero-structures, and non-linear phenomena in Josephson devices.
description: references added; expanded discussion; journal reference
Angular Momentum of a Photon and Phase Conjugation
Creators: name: Okulov, A. Yu.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the concept of an ideal phase-conjugating mirror we demonstrate that regardless of internal physical mechanism the phase-conjugation of a singular laser beam is accompanied by excitation within the mirror of internal waves which carry doubled angular momentum in order to match angular momentum conservation. For a Brillouin hypersound wavefront-reversal mirror this means that each elementary optical vortex belonging to a speckle pattern emits an acoustical vortex wave with doubled topological charge. The exact spatial profiles of light intensity and the intensity of hypersound in the vicinity of the phase singularity are obtained. These spiral profiles have a form of double helix which rotates with the frequency of sound. An optoacoustic experiment is proposed for visualization of the wavefront reversal of twisted optical beams and tunable twisted sound generation.
description: 12 pages, 5 figures
Spin dynamics from a constrained magnetic Tight-Binding model
Creators: name: Cardias, Ramon
name: Barreteau, Cyrille
name: Thibaudeau, Pascal
name: Fu, Chu Chun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A dynamics of the precession of coupled atomic moments in the tight-binding (TB) approximation is presented. By implementing an angular penalty functional in the energy that captures the magnetic effective fields self-consistently, the motion of the orientation of the local magnetic moments is observed faster than the variation of their magnitudes. This allows the computation of the effective atomic magnetic fields that are found consistent with the Heisenberg's exchange interaction, by comparison with classical atomistic spin dynamics on Fe, Co and Ni magnetic clusters.
A Manifestly Gauge Invariant, Continuum Calculation of the SU(N) Yang-Mills two-loop beta function
Creators: name: Morris, Tim R.
name: Rosten, Oliver J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The manifestly gauge invariant Exact Renormalisation Group provides a framework for performing continuum computations in SU(N) Yang-Mills theory, without fixing the gauge. We use this formalism to compute the two-loop beta function in a manifestly gauge invariant way, and without specifying the details of the regularisation scheme.
description: 69 pages, 29 figures. v2: published in prd; methodology refined, typos corrected
Price Changes in Regulated Healthcare Markets: Do Public Hospitals Respond and How?
Creators: name: Verzulli, Rossella
name: Fiorentini, Gianluca
name: Lippi Bruni, Matteo
name: Ugolini, Cristina
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: SECS-P/03 Scienza delle finanze

description: This paper examines the behaviour of public hospitals in response to the average payment
incentives created by price changes for patients classified in different Diagnosis Related
Groups (DRGs). Using panel data on public hospitals located within the Italian region of
Emilia-Romagna, we test whether a one-year increase in DRG prices induced public
hospitals to increase their volume of activity, and whether a potential response is associated
with changes in waiting times and/or length of stay. We find that public hospitals reacted to
the policy change by increasing the number of patients with surgical treatments. This effect
was smaller in the two years after the policy change than in later years, and for providers
with a lower excess capacity in the pre-policy period, whereas it did not vary significantly
across hospitals according to their degree of financial and administrative autonomy. For
patients with medical DRGs, instead, there appeared to be no effect on inpatient volumes.
Our estimates also suggest that an increase in DRG prices either decreased or had no impact
on the proportion of patients waiting more than six months. Finally, we find no evidence of
a significant effect on patients’ average length of stay.
Suitability of pressed earth construction in Brazzaville, Congo: an analysis from the average home-builders’ perspective
Creators: name: Louvouezo, Claude Patrick
Publisher: name: University of British Columbia
Year: 2009

description: Concrete masonry has increasingly been used in Brazzaville since the 1950s. It has superseded sun-dried earth as the principal building practice. On the other hand, the widespread use of concrete has resulted in the deterioration of housing conditions, because a large majority of people in Brazzaville cannot afford adequately finished concrete houses. Recently, the Congolese Government has introduced pressed earth block masonry as an affordable substitute to concrete masonry. Pressed earth masonry is currently being promoted through a government housing project called 1000 Logements Project. An analysis of the 1000 Logements Project shows that the project has succeeded in building pressed earth masonry houses which cost about 45% less than concrete masonry houses. The thesis hypothesises that the construction practices in a government housing project are different from that of the majority of people. Government housing projects are carried within the so-called formal sector while those of the majority of people are carried within the so-called informal sector. The thesis analyses the suitability of pressed earth masonry with respect to the housing practices of the average home-builders in Brazzaville. The thesis proposes that pressed earth masonry must (1) meet the standards of affordability, selfsufficiency, sustainability, employment generation, climatic comfort, durability, safety, adaptability and cultural compatibility in order to suit the needs and expectations of the majority of people in Brazzaville, and (2) offer benefits which match or surpass those offered by both existing building practices~i.e. sun-dried earth and concrete masonry—in order to be adopted. The thesis found that pressed earth is not affordable due to the high retail cost of pressed earth blocks and the high transportation requirements. Pressed earth does not provide self-sufficiency due to the high cost of block manufacturing machinery. On the other hand, the thesis found that pressed earth has the potential to overcome the drawbacks of both sun-dried earth and concrete masonry. The thesis concludes that, with adequate incentives, pressed earth can become an alternative building practice in Brazzaville.
Manajemen Publikasi OJS 3.2.x
Creators: name: Yunus, Muhammad
Publisher: name: Zenodo
Year: 2021
Subjects: OJS 3
manajemen publikasi
manajemen publikasi ojs 3.2.x
ojs 3.2.x

description: Membahas teknis manajemen publikasi menggunakan OJS versi 3.2.x ke atas mulai dari submit sampai publish. Pada modul ini dijelaskan secara rinci masing-masing peran dari author, editor, section editor, copyeditor, layout editor dan proofreader. Modul ini diharapkan mampu membantu dalam meningkatkan kualitas pengelolaan jurnal bagi pengelola jurnal di seluruh Indonesia khususnya. Materi dalam modul ini juga disampaikan pada kegiatan Bimbingan Teknis Manajemen Publikasi dengan OJS versi 3 di Jurnal Ilmu Peternakan Terapan (JIPT) Politeknik Negeri Jember yang dilaksanakan pada tanggal 3-4 Maret 2021.
description: Disampaikan pada Acara Kegiatan Bimbingan Teknis (BIMTEK) Manajemen Publikasi OJS 3 Jurnal Ilmu Peternakan Terapan (JIPT) Politeknik Negeri Jember, 3-4 Maret 2021
The Midpoint Rule as a Variational--Symplectic Integrator. I. Hamiltonian Systems
Creators: name: Brown, David
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Numerical algorithms based on variational and symplectic integrators exhibit special features that make them promising candidates for application to general relativity and other constrained Hamiltonian systems. This paper lays part of the foundation for such applications. The midpoint rule for Hamilton's equations is examined from the perspectives of variational and symplectic integrators. It is shown that the midpoint rule preserves the symplectic form, conserves Noether charges, and exhibits excellent long--term energy behavior. The energy behavior is explained by the result, shown here, that the midpoint rule exactly conserves a phase space function that is close to the Hamiltonian. The presentation includes several examples.
description: 11 pages, 8 figures, REVTeX
Experimental validation of MDL emulation and estimation techniques for SDM transmission systems
Creators: name: Hout, Menno van den
name: Ospina, Ruby S. B.
name: van der Heide, Sjoerd
name: Alvarado-Zacarias, Juan Carlos
name: Antonio-López, Jose Enrique
name: Bigot-Astruc, Marianne
name: Correa, Adrian Amezcua
name: Sillard, Pierre
name: Amezcua-Correa, Rodrigo
name: Mello, Darli A. A.
name: Okonkwo, Chigo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We experimentally validate a mode-dependent loss (MDL) estimation technique employing acorrection factor to remove the MDL estimation dependence on the SNR when using a minimum meansquare error (MMSE) equalizer. A reduction of the MDL estimation error is observed for both transmitter-side and in-span MDL emulation.
description: Accepted for presentation at European Conference on Optical Communications (ECOC) 2020
Formation of Multifractal Population Patterns from Reproductive Growth and Local Resettlement
Creators: name: Ozik, Jonathan
name: Hunt, Brian R.
name: Ott, Edward
Publisher: name: arXiv
Year: 2005
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider the general character of the spatial distribution of a population that grows through reproduction and subsequent local resettlement of new population members. We present several simple one and two-dimensional point placement models to illustrate possible generic behavior of these distributions. We show, numerically and analytically, that these models all lead to multifractal spatial distributions of population. Additionally, we make qualitative links between our models and the example of the Earth at Night image, showing the Earth's nighttime man-made light as seen from space. The Earth at Night data suffer from saturation of the sensing photodetectors at high brightness (`clipping'), and we account for how this influences the determined dimension spectrum of the light intensity distribution.
description: 37 pages, 20 figures; added content
Chaotic and Regular Motion in Dissipative Gravitational Billiards
Creators: name: Gorski, A. Z.
name: Srokowski, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider the motion of a particle subjected to the constant gravitational field and scattered inelasticaly by hard boundaries which possess the shape of parabola, wedge, and hyperbola. The billiard itself performs oscillations. The linear dependence of the restitution coefficient on the particle velocity is assumed. We demonstrate that this dynamical system can be either regular or chaotic, which depends on the billiard shape and the oscillation frequency. The trajectory calculations are compared with the experimental data; a good agreement has been achieved. Moreover, the properties of the system has been studied by means of the Lyapunov exponents and the Kaplan-Yorke dimension. Chaotic and nonuniform patterns visible in the experimental data are interpreted as a result of large embedding dimension.
description: RevTeX 4, 2 figures
Lorentz Violating Supersymmetric Quantum Electrodynamics
Creators: name: Bolokhov, Pavel A.
name: Nibbelink, Stefan Groot
name: Pospelov, Maxim
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Theory of Supersymmetric Quantum Electrodynamics is extended by interactions with external vector and tensor backgrounds, that are assumed to be generated by some Lorentz-violating (LV) dynamics at an ultraviolet scale perhaps related to the Planck scale. Exact supersymmetry requires that such interactions correspond to LV operators of dimension five or higher, providing a solution to the naturalness problem in the LV sector. We classify all dimension five and six LV operators, analyze their properties at the quantum level and describe observational consequences of LV in this theory. We show that LV operators do not induce destabilizing D-terms, gauge anomaly and the Chern-Simons term for photons. We calculate the renormalization group evolution of dimension five LV operators and their mixing with dimension three LV operators, controlled by the scale of the soft-breaking masses. Dimension five LV operators are constrained by the low-energy precision measurements at 10^{-10}-10^{-5} level in units of the inverse Planck scale, while the Planck-scale suppressed dimension six LV operators are allowed by observational data.
description: 37 pages LaTeX, minor revisions, and typos corrected
Ab initio calculations of mean free paths and stopping powers
Creators: name: Sorini, A. P.
name: Kas, J. J.
name: Rehr, J. J.
name: Prange, M. P.
name: Levine, Z. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A method is presented for first-principles calculations of inelastic mean free paths and stopping powers in condensed matter over a broad energy range. The method is based on {\it ab initio} calculations of the dielectric function in the long wavelength limit using a real-space Green's function formalism, together with extensions to finite momentum transfer. From these results we obtain the loss function and related quantities such as optical-oscillator strengths and mean excitation energies. From a many-pole representation of the dielectric function we then obtain the electron self-energy and inelastic mean free paths (IMFP). Finally using our calculated dielectric function and the optical-data model of Fernández-Varea {\it et al}., we obtain collision stopping powers (CSP) and penetration ranges. The results are consistent with semi-empirical approaches and with experiment.
description: 17 p., 8 fig
Exploring the BWCA (Bino-Wino Co-Annihilation) Scenario for Neutralino Dark Matter
Creators: name: Baer, Howard
name: Krupovnickas, Tadas
name: Mustafayev, Azar
name: Park, Eun-Kyung
name: Profumo, Stefano
name: Tata, Xerxes
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In supersymmetric models with non-universal gaugino masses, it is possible to have opposite-sign SU(2) and U(1) gaugino mass terms. In these models, the gaugino eigenstates experience little mixing so that the lightest SUSY particle remains either pure bino or pure wino. The neutralino relic density can only be brought into accord with the WMAP measured value when bino-wino co-annihilation (BWCA) acts to enhance the dark matter annihilation rate. We map out parameter space regions and mass spectra which are characteristic of the BWCA scenario. Direct and indirect dark matter detection rates are shown to be typically very low. At collider experiments, the BWCA scenario is typified by a small mass gap m_{\tilde Z_2}-m_{\tilde Z_1} ~ 20-80 GeV, so that tree level two body decays of \tilde Z_2 are not allowed. However, in this case the second lightest neutralino has an enhanced loop decay branching fraction to photons. While the photonic neutralino decay signature looks difficult to extract at the Fermilab Tevatron, it should lead to distinctive events at the CERN LHC and at a linear e^+e^- collider.
description: 44 pages, 21 figures
Hysteresis loops and adiabatic Landau-Zener-Stückelberg transitions in the magnetic molecule V$_6$
Creators: name: Rousochatzakis, I.
name: Ajiro, Y.
name: Mitamura, H.
name: Kögerler, P.
name: Luban, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have observed hysteresis loops and abrupt magnetization steps in the magnetic molecule V$_6$, where each molecule comprises a pair of identical spin triangles, in the temperature range 1-5 K for external magnetic fields $B$ with sweep rates of several Tesla/ms executing a variety of closed cycles. The hysteresis loops are accurately reproduced using a generalization of the Bloch equation based on direct one-phonon transitions between the instantaneous Zeeman-split levels of the ground state (an $S=1/2$ doublet) of each spin triangle. The magnetization steps occur for $B\approx 0$ and they are explained in terms of adiabatic Landau-Zener-Stückelberg transitions between the lowest magnetic energy levels as modified by inter-triangle anisotropic exchange of order 0.4 K.
description: 4 pages, 3 figures
What determines the mass of the most massive star cluster in a galaxy: statistics, physics or disruption?
Creators: name: Gieles, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In many different galactic environments the cluster initial mass function (CIMF) is well described by a power-law with index -2. This implies a linear relation between the mass of the most massive cluster (M_max) and the number of clusters. Assuming a constant cluster formation rate and no disruption of the most massive clusters it also means that M_max increases linearly with age when determining M_max in logarithmic age bins. We observe this increase in five out of the seven galaxies in our sample, suggesting that M_max is determined by the size of the sample. It also means that massive clusters are very stable against disruption, in disagreement with the mass independent disruption (MID) model presented at this conference. For the clusters in M51 and the Antennae galaxies the size-of-sample prediction breaks down around 10^6 M_sun, suggesting that this is a physical upper limit to the masses of star clusters in these galaxies. In this method there is a degeneracy between MID and a CIMF truncation. We show how the cluster luminosity function can serve as a tool to distinguish between the two.
description: 6 pages, 3 figures, to appear in ``Young Massive Star Clusters - Initial Conditions and Environments'', 2008, Astrophysics & Space Science, eds. E. Perez, R. de Grijs, R. M. Gonzalez Delgado
VTXO: The Virtual Telescope for X-ray Observations
Creators: name: Krizmanic, John F.
name: Shah, Neerav
name: Calhoun, Philip C.
name: Harding, Alice K.
name: Purves, Lloyd R.
name: Webster, Cassandra M.
name: Corcoran, Michael F.
name: Shrader, Chris R.
name: Stochaj, Steven J.
name: Rankin, Kyle A.
name: Smith, Daniel T.
name: Park, Hyeongjun
name: Boucheron, Laura E.
name: Kota, Krishna
name: Naseri, Asal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Virtual Telescope for X-ray Observations (VTXO) will use lightweight Phase Fresnel Lenses (PFLs) in a virtual X-ray telescope with $\sim$1 km focal length and with $\sim$50 milli-arcsecond angular resolution. VTXO is formed by using precision formation flying of two SmallSats: a smaller OpticsSat that houses the PFLs and navigation beacons while a larger DetectorSat contains an X-ray camera, a precision start tracker, and the propulsion for the formation flying. The baseline flight dynamics uses a highly elliptical supersynchronous orbit allow the formation to hold in an inertial frame around the 90,000 km apogee for 10 hours of the 32.5 hour orbit with nearly a year mission lifetime. VTXO's fine angular resolution enables measuring the environments close to the central engines of bright compact X-ray sources. This X-ray imaging capability allows for the study of the effects of dust scattering near to the central objects such as Cyg X-3 and GX 5-1, for the search for jet structure near to the compact object in X-ray novae such as Cyg X-1 and GRS 1915+105, and for the search for structure in the termination shock of in the Crab pulsar wind nebula. The VTXO SmallSat and instrument designs, mission parameters, and science performance are described. VTXO development was supported as one of the selected 2018 NASA Astrophysics SmallSat Study (AS$^3$) missions.
description: 6 pages, 7 figures, corrected version, Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114447V (2020). arXiv admin note: text overlap with arXiv:2006.12174
Thermal effects in non-Fermi liquid superconductivity
Creators: name: Damia, Jeremias Aguilera
name: Solis, Mario
name: Torroba, Gonzalo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit the interplay between superconductivity and quantum criticality when thermal effects from virtual static bosons are included. These contributions, which arise from an effective theory compactified on the thermal circle, strongly affect field-theoretic predictions even at small temperatures. We argue that they are ubiquitous in a wide variety of models of non-Fermi liquid behavior, and generically produce a parametric suppression of superconducting instabilities. We apply these ideas to non-Fermi liquids in $d=2$ space dimensions, obtained by coupling a Fermi surface to a Landau-damped soft boson. Extending previous methods developed for $d=3-ε$ dimensions, we determine the dynamics and phase diagram. It features a naked quantum critical point, separated by a continuous infinite order transition from a superconducting phase with strong non-Fermi liquid corrections. We also highlight the relevance of these effects for (numerical) experiments on non-Fermi liquids.
description: 5 figures
Observation of a Turbulence-Induced Large Scale Magnetic Field
Creators: name: Spence, E. J.
name: Nornberg, M. D.
name: Jacobson, C. M.
name: Kendrick, R. D.
name: Forest, C. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: An axisymmetric magnetic field is applied to a spherical, turbulent flow of liquid sodium. An induced magnetic dipole moment is measured which cannot be generated by the interaction of the axisymmetric mean flow with the applied field, indicating the presence of a turbulent electromotive force. It is shown that the induced dipole moment should vanish for any axisymmetric laminar flow. Also observed is the production of toroidal magnetic field from applied poloidal magnetic field (the omega-effect). Its potential role in the production of the induced dipole is discussed.
description: 5 pages, 4 figures Revisions to accomodate peer-reviewer concerns; changes to main text including simplification of a proof, Fig. 2 updated, and minor typos and clarifications; Added refrences. Resubmitted to Phys. Rev. Lett
Local Topological Markers in Odd Dimensions
Creators: name: Sykes, Joseph
name: Barnett, Ryan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Local topological markers have proven to be a valuable tool for investigating systems with topologically non-trivial bands. Due to their local nature, such markers can treat translationally invariant systems and spatially inhomogeneous systems on an equal footing. Among the most prevalent of these is the so-called Chern marker, which is available for systems in two spatial dimensions. In this paper, we describe how to generalize this marker to 1d and 3d systems, by showing that the relevant expressions accurately describe the phenomenon of topological pumping given by the first and second Chern numbers in 1d and 3d respectively. In addition to providing general derivations, we verify the markers by numerically considering model Hamiltonians. These results will open the door for future studies including the influence of disorder on topological pumping and topological phase transitions in odd-dimensional systems.
description: 14 pages. Minor edits. Comments welcome
Antiferromagnetic s-d exchange coupling in GaMnAs
Creators: name: Myers, R. C.
name: Poggio, M.
name: Stern, N. P.
name: Gossard, A. C.
name: Awschalom, D. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Measurements of coherent electron spin dynamics in Ga(1-x)Mn(x)As/Al(0.4)Ga(0.6)As quantum wells with 0.0006% < x < 0.03% show an antiferromagnetic (negative) exchange bewteen s-like conduction band electrons and electrons localized in the d-shell of the Mn2+ impurities. The magnitude of the s-d exchange parameter, N0 alpha, varies as a function of well width indicative of a large and negative contribution due to kinetic exchange. In the limit of no quantum confinement, N0 alpha extrapolates to -0.09 +/- 0.03 eV indicating that antiferromagnetic s-d exchange is a bulk property of GaMnAs. Measurements of the polarization-resolved photoluminescence show strong discrepancy from a simple model of the exchange enhanced Zeeman splitting, indicative of additional complexity in the exchange split valence band.
description: 5 pages, 4 figures and one action figure
Calculation example and guidelines from Measuring complexity in organisms and organizations
Creators: name: Rebout, Nancy
name: Jean-Christophe Lone
name: Marco, Arianna De
name: Cozzolino, Roberto
name: Lemasson, Alban
name: Thierry, Bernard
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 60114 Systems Biology
subject: FOS: Biological sciences
subject: 60199 Biochemistry and Cell Biology not elsewhere classified
subject: 69999 Biological Sciences not elsewhere classified
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Calculation of indices for macaque social systems & Guidelines for selecting variables and sample spaces
1 Tbit/s/$λ$ Transmission Over a 130 km Link Consisting of Graded-Index 50 $μ$m Core Multi-Mode Fiber and 6LP Few-Mode Fiber
Creators: name: Hout, Menno van den
name: van der Heide, Sjoerd
name: van Weerdenburg, John
name: Bogot-Astruc, Marianne
name: Correa, Adrian Amezcua
name: Antonio-López, Jose Enrique
name: Alvarado-Zacarias, Juan Carlos
name: Sillard, Pierre
name: Amezcua-Correa, Rodrigo
name: Okonkwo, Chigo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We demonstrate 1 Tbit/s/$λ$ single-span transmission over a heterogeneous link consisting of graded-index 50 $μ$m core multi-mode fiber and 6LP few-mode fiber using a Kramers-Kronig receiver structure. Furthermore, the link budget increase by transmitting only three modes while employing more than three receivers is investigated.
description: Accepted for presentation at European Conference on Optical Communications (ECOC) 2020
Appendices from Anisotropic interaction and motion states of locusts in a hopper band
Creators: name: Weinburd, Jasper
name: Landsberg, Jacob
name: Kravtsova, Anna
name: Lam, Shanni
name: Sharma, Tarush
name: Simpson, Stephen J.
name: Sword, Gregory A
name: Buhl, Camille
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310114
subject: Systems biology
classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 310908
subject: Animal physiology - biophysics
classificationCode: 320802
subject: Human biophysics

description: These appendices contain additional details: A - Sample video footage, B - Tables, C - TrackMate details, D - Data, E - Code, F - Mathematical details, G - Anisotropy after accounting for locust body shape
Super Fuzzy Matrices and Super Fuzzy Models for Social Scientists
Creators: name: Kandasamy, W. B. Vasantha
name: Smarandache, Florentin
name: Amal, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 15-xx

description: This book introduces the concept of fuzzy super matrices and operations on them. This book will be highly useful to social scientists who wish to work with multi-expert models. Super fuzzy models using Fuzzy Cognitive Maps, Fuzzy Relational Maps, Bidirectional Associative Memories and Fuzzy Associative Memories are defined here. The authors introduce 13 multi-expert models using the notion of fuzzy supermatrices. These models are described with illustrative examples. This book has three chapters. In the first chaper, the basic concepts about super matrices and fuzzy super matrices are recalled. Chapter two introduces the notion of fuzzy super matrices adn their properties. The final chapter introduces many super fuzzy multi expert models.
description: 280 pages
Multiclass Model for Agriculture development using Multivariate Statistical method
Creators: name: Deepa, N
name: Khan, Mohammad Zubair
name: B, Prabadevi
name: M, Durai Raj Vincent P
name: Maddikunta, Praveen Kumar Reddy
name: Gadekallu, Thippa Reddy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Mahalanobis taguchi system (MTS) is a multi-variate statistical method extensively used for feature selection and binary classification problems. The calculation of orthogonal array and signal-to-noise ratio in MTS makes the algorithm complicated when more number of factors are involved in the classification problem. Also the decision is based on the accuracy of normal and abnormal observations of the dataset. In this paper, a multiclass model using Improved Mahalanobis Taguchi System (IMTS) is proposed based on normal observations and Mahalanobis distance for agriculture development. Twenty-six input factors relevant to crop cultivation have been identified and clustered into six main factors for the development of the model. The multiclass model is developed with the consideration of the relative importance of the factors. An objective function is defined for the classification of three crops, namely paddy, sugarcane and groundnut. The classification results are verified against the results obtained from the agriculture experts working in the field. The proposed classifier provides 100% accuracy, recall, precision and 0% error rate when compared with other traditional classifier models.
description: in IEEE Access
Supplementary Figures and Models for the Moran Process from Graph-structured populations and the Hill–Robertson effect
Creators: name: Whigham, Peter A.
name: Spencer, Hamish G.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: Computational Biology
subject: 10202 Biological Mathematics
subject: FOS: Mathematics
subject: 80110 Simulation and Modelling

description: Additional figures for results from HR and models of the Moran process
Quark mass effects in the soft-collinear effective theory and B -> X_s + photon in the endpoint region
Creators: name: Chay, Junegone
name: Kim, Chul
name: Leibovich, Adam K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the effects of a light quark mass in the soft-collinear effective theory (SCET) and we apply them to B -> X_s gamma in the endpoint region. We find that the reparameterization invariance can be extended by including the collinear quark mass in the SCET Lagrangian. This symmetry constrains the theory with the quark mass terms, and we present explicit results at one loop. It also relates the Wilson coefficients of some mass operators to those of the leading operators, which are useful in organizing the subleading effects due to the quark mass in B -> X_s gamma. We present strange quark mass corrections to B -> X_s gamma in the endpoint region as an application. The forward scattering amplitude from the mass corrections is factorized, and it can be expressed as a convolution of the m_s^2/p_X^2-suppressed jet function and the leading-order shape function of the B meson. This contribution should be added to the existing subleading contributions from the B meson shape functions to obtain complete subleading corrections.
description: 30 pages, 6 figures; some errors are corrected and numerical estimates are added
Higgs-Mediated tau --> mu and tau --> e transitions in II Higgs doublet Model and Supersymmetry
Creators: name: Paradisi, Paride
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the phenomenology of the mu-tau and e-tau lepton flavour violation (LFV) in a general two Higgs Doublet Model (2HDM) including the supersymmetric case. We consider several LFV decay modes of the charged fermion tau, namely tau-> l_jgamma, tau->l_j l_k l_k and tau-> l_jeta. The predictions and the correlations among the rates of the above processes are computed. In particular, it is shown that tau->l_jgamma processes are the most sensitive channels to Higgs-mediated LFV specially if the splitting among the neutral Higgs bosons masses is not below the 10% level.
description: v2=published version: 13 pages, 4 figures, text improved and reference added. Two loop effects (relevant for tau->l_jgamma) added. Conclusions unchanged
Nonequilibrium Quantum Free Energy and Effective Temperature, Generating Functional and Influence Action
Creators: name: Hsiang, Jen-Tsung
name: Hu, B. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A definition of nonequilibrium free energy $\mathcal{F}_{\textsc{s}}$ is proposed for dynamical Gaussian quantum open systems strongly coupled to a heat bath and a formal derivation is provided by way of the generating functional in terms of the coarse-grained effective action and the influence action. For Gaussian open quantum systems exemplified by the quantum Brownian motion model studied here, a time-varying effective temperature can be introduced in a natural way, and with it, the nonequilibrium free energy $\mathcal{F}_{\textsc{s}}$, von Neumann entropy $\mathcal{S}_{vN}$ and internal energy $\mathcal{U}_{\textsc{s}}$ of the reduced system ($S$) can be defined accordingly. In contrast to the nonequilibrium free energy found in the literature which references the bath temperature, the nonequilibrium thermodynamic functions we find here obey the familiar relation $\mathcal{F}_{\textsc{s}}(t)=\mathcal{U}_{\textsc{s}}(t)- T_{\textsc{eff}} (t)\,\mathcal{S}_{vN}(t)$ {\it at any and all moments of time} in the system's fully nonequilibrium evolution history. After the system equilibrates they coincide, in the weak coupling limit, with their counterparts in conventional equilibrium thermodynamics. Since the effective temperature captures both the state of the system and its interaction with the bath, upon the system's equilibration, it approaches a value slightly higher than the initial bath temperature. Notably, it remains nonzero for a zero-temperature bath, signaling the existence of system-bath entanglement. Reasonably, at high bath temperatures and under ultra-weak couplings, it becomes indistinguishable from the bath temperature. The nonequilibrium thermodynamic functions and relations discovered here for dynamical Gaussian quantum systems should open up useful pathways toward establishing meaningful theories of nonequilibrium quantum thermodynamics.
description: 26 pages, 1 figure. No change in v2, added further comments
Erwartungen an die 7. Vollversammlung des ÖRK in Canberra aus der Sicht der Gruppen und Netzwerke
Creators: name: Linz, Johanna
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 40 Nr. 1 (1991): Ökumenische Rundschau, Band 40, Heft 1
Nonlinear effects in locally-resonant nanostrip phononic metasurface at GHz frequencies
Creators: name: Gao, Feng
name: Bermak, Amine
name: Benchabane, Sarah
name: Raschetti, Marina
name: Khelif, Abdelkrim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this paper, we report on the observation of nonlinear effects in a nanostrip phononic metasurface (NPM) that enable the tuning of resonance frequencies at 1.42 GHz. The NPM resonator made of periodic nanostrip array is fabricated on a lithium niobate substrate. Each of the nanostrip is 250-nm wide and is made of 680-nm-thick SiO2 layer stacking on 50-nm Al metal electrodes. Finite element analysis reveals that the device operates in a vertically polarized (compression) mode with substantial acoustic energy confined in the nanostrips, leading to a local resonance at low acoustic velocity. Due to the nonlinearity, the resonance frequency of the device decreases quadratically with the increase of stimulation power from 10 to 30 dBm. The underlying mechanism of the nonlinearity is found to be the power-dependent coupling of the adjacent nanostrips. This coupling induces softening of the substrate surface region, which reduces the acoustic velocity and hence the bulk radiation. As a result, the quality factor of the NPM resonator is found to improve with the increase of stimulation power. The power-dependent coupling of nanostrips in the NPM resonator demonstrates a reliable method for the realization of nonlinearity in phononic metasurfaces, which would significantly enrich the mechanisms for the manipulation of surface acoustic waves at high frequencies.
Canonical Constraints on Leptonic Cp Violation using UHCR neutrino fluxes
Creators: name: Balaji, K. R. S.
name: Couture, G.
name: Hamzaoui, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that one can in principle constrain the CP-violating parameter delta from measurements of four independant |V_{ij}|^2, or three of them and a ratio, in the leptonic sector. To quantify our approach, using unitarity, we derive simple expressions in terms of four independant |V_{ij}|^2 for cos(delta) and an expression for sin^2(delta) from J^2. Thus, depending on the values of |V_{ij}| and their accuracy, we can set meaningful limits on |delta|. To illustrate numerically, if |V_{u1}|^2 is close to 0.1 with a 10% precision, and if |V_{e3}^2 is larger than 0.005 and for values of |V_{e2}|^2 and |V_{u3}|^2 that stay within +-0.1 of the current experimental data leads to a bound pi/2 < |delta| < pi. Alternatively, a certain combination of parameters with values of |V_{e3}|^2 larger than 0.01 leads to a closed bound of 73 < |delta| < 103. In general, we find that it is better to use |V_{u1}|^2 or |V_{t1}|^2 as the fourth independant |V_{ij}|^2 and that over most of the parameter space, delta is least sensitive to |V_{e3}|^2. With just three independant measurements (solar, atmospheric and reactor) it is impossible to set limits on the CP phase. In this respect, we study the use of ultra high energy cosmic (UHCR) neutrino fluxes as the additional fourth information. We find that within the SM, neutrino fluxes of all three flavours will be very similar but that pushing current neutrino data to their extreme values still allowed, ratios of cosmic neutrino fluxes can differ by up to 20%; such large discrepancies could imply negligibly small CP-violation. We also study a non radiative neutrino decay model and find that the neutrino fluxes can differ by a factor of up to 3 within this model and that an accuracy of 10% on the neutrino fluxes is sufficient to set interestin limits on delta.
description: 8 pages, 2 figures, 5 tables