cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Materials with ZrCuSiAs Type Structure
Creators: name: Pottgen, Rainer
name: Johrendt, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The crystal chemistry and physical properties of materials with ZrCuSiAs type structure is reviewed.
description: 32 pages, 1 figure. Z. Naturforsch. B, submitted
Exceptional algebroids and type IIB superstrings
Creators: name: Bugden, Mark
name: Hulik, Ondrej
name: Valach, Fridrich
name: Waldram, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this note we study exceptional algebroids, focusing on their relation to type IIB superstring theory. We show that a IIB-exact exceptional algebroid (corresponding to the group $E_{n(n)}\times \mathbb{R}^+$, for $n\le 6$) locally has a standard form given by the exceptional tangent bundle. We derive possible twists, given by a flat $\mathfrak{gl}(2,\mathbb{R})$-connection, a covariantly closed pair of 3-forms, and a 5-form, and comment on their physical interpretation. Using this analysis we reduce the search for Leibniz parallelisable spaces, and hence maximally supersymmetric consistent truncations, to a simple algebraic problem. We show that the exceptional algebroid perspective also gives a simple description of Poisson-Lie U-duality without spectators and hence of generalised Yang-Baxter deformations.
description: 12 pages
ULTRATOVUSH TEKSHIRUVLARIDA  IT TEXNOLOGIYALARINING AHAMIYAT
Creators: name: Maxmudova, Zarina
Publisher: name: Zenodo
Year: 2023

description: IT soxasida axborot texnologiyalarni ultratovush bilan bog’liqlik tomoni shundaki inson o’zining organizmida kasaliklarni bilish uning kanday shakilda borishini va uning oldini olishi orqali uning davolashini yordam beradi. Xozirgi kunda IT soxasi rivojlanishi bilan ultra tovushning yanayam qulayligini amalga oshirib kelmoqda xozirgi kunda kelib IT soxasiga yani inson tanasidagi kassaliklarini ko’rib uni xulosasini chiqarish uchun yangi texnologiyalar ishlab kelinmoqda Ushu asosida ultratovush yordamida insonlarnig organizimini kasalliklarini oldini olib kelinmoqda ya’ni o’simta kasalliklarning rivojlanishini yoki oshqozon osti kasalliklarini oldini olish natijasida ultratovush natijalarini oldini olib kelinmoqda.
A time-series VI study of the variable stars of the globular cluster NGC 6397
Creators: name: Ahumada, J. A.
name: Ferro, A. Arellano
name: Fierro, I. Bustos
name: Lázaro, C.
name: Yepez, M. A.
name: Schroeder, K. P.
name: Calderón, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new time-series VI CCD photometry of the globular cluster NGC 6397, from which we obtained and analysed the light curves of 35 variables carefully identified in the cluster field. We assessed the membership of the variables with an astrometric analysis based on \emph{Gaia} DR2 data. The cluster colour-magnitude diagram was differentially dereddened and cleaned of non members, which allowed us to fit isochrones for [Fe/H]$ = -2.0$ dex in the range 13.0--13.5 Gyr, for a mean reddening $E(B-V)=0.19$, and a distance of 2.5 kpc. This distance was confirmed using the period-luminosity relation for the cluster's five SX Phoenicis variables (V10, V11, V15, V21, and V23) present among its blue stragglers, yielding $2.24\pm0.13$ kpc. We also modelled the light curves of four eclipsing binaries (V4, V5, V7, and V8), and gave the parameters of the systems; the contact binaries V7 and V8 have distances consistent with that of the cluster. NGC 6397 appears to harbour no RR Lyrae stars, being its horizontal branch remarkably blue, much like that of its analogous cluster, M10. To match the blue tail of the horizontal branch population, models of 0.64--0.66 $M_\odot$ with mass loss at the RGB are required, indicating rather thin shell masses for the HB stars.
description: 19 pages, 9 figures
Contributions to the geology and petrology of the Trans-Mexican Volcanic belt
Creators: name: Nixon, Graham Tom
Publisher: name: University of British Columbia
Year: 2010

description: The composition and spatial distribution of Quaternary volcanism in the Trans-Mexican Volcanic Belt (TMVB) exhibit some remarkable correlations with the seismicity, age, and structure of ocean lithosphere being consumed at the Middle America Trench. In the west, the TMVB is related to aseismic subduction of the Rivera plate (2 cm/yr) and in the east to a moderately dipping (20-30°) rapidly subducting Cocos plate (6-9 cm/yr). These contrasting arc segments are bounded by the Colima Graben, a zone of high-angle faulting and contemporaneous alkaline/calc-alkaline volcanism, situated above a sinistral transform fault (4 cm/yr) developed in the downgoing slab at the Cocos/Rivera juncture. Geologic mapping and K-Ar dating of the lavas of Iztaccíhuatl, a major calc-alkaline volcano in the TMVB, have established two main phases of eruptive activity that began prior to 0.9 Ma. The substructure of Iztaccíhuatl (>0.6 Ma) is composed principally of two-pyroxene andesites and dacites (300 km³) erupted from Llano Grande and Ancestral Pies volcanoes. The second stage of cone construction (<0.6 Ma) involved horn- blende dacites and andesites (150 km³) extruded from NNW-SSE oriented vents to form the modern summit region. The earliest glacial deposits date prior to 0.27 Ma but moraine complexes on the flanks are Wisconsin to Neoglacial. The phenocryst mineralogy and chemistry of the Younger Andesites and Dacites indicate that magma mixing has played an important role in the evolution of Iztaccíhuatl magma chambers. Mixed lavas characterized by disequilibrium phenocryst assemblages involving magnesian olivine and in the crust and olivine-phyric basaltic magma ascending from depth. Mixing and homogenization are effected by liquid blending and dynamic fractional crystallization in turbulently convecting hybrid liquids. The whole-rock geochemistry of mixed lavas and hornblende dacites is used to derive the composition of each batch of basaltic magma periodically replenishing crustal magma chambers. Basaltic end-members exhibit significant variations in large-ion lithophile elements and Sr isotopic composition which are attributed to heterogeneities in mantle source regions. The primitive compositions of these magmas are compatible with an origin involving partial melting of fertile peridotite under hydrous high-pressure conditions.
Production of light particles by very strong and slowly varying magnetic fields
Creators: name: Calucci, Giorgio
name: Di Piazza, Antonino
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility that around some astrophysical objects there are non-static magnetic fields of enormous intensity suggests that in these situations real particles may be produced. The slowness of the variation is compensated by the huge intensity. The main issue is the production of e+,e- pairs annihilating into photons and the direct production of photons, as one of the concurrent process in the GRB (gamma ray bursts). Then some simple effects due to the presence of the intense gravity are studied and finally a look is given to the production of other kinds of particles.
description: 3 pages ISMD (2006) Conference - Paraty, R.J. Brazil
Trapping enhanced by noise in nonhyperbolic and hyperbolic chaotic scattering
Creators: name: Nieto, Alexandre R.
name: Seoane, Jesús M.
name: Sanjuán, Miguel A. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The noise-enhanced trapping is a surprising phenomenon that has already been studied in chaotic scattering problems where the noise affects the physical variables but not the parameters of the system. Following this research, in this work we provide strong numerical evidence to show that an additional mechanism that enhances the trapping arises when the noise influences the energy of the system. For this purpose, we have included a source of Gaussian white noise in the Hénon-Heiles system, which is a paradigmatic example of open Hamiltonian system. For a particular value of the noise intensity, some trajectories decrease their energy due to the stochastic fluctuations. This drop in energy allows the particles to spend very long transients in the scattering region, increasing their average escape times. This result, together with the previously studied mechanisms, points out the generality of the noise-enhanced trapping in chaotic scattering problems.
description: 22 pages, 14 figures
THE EVOLUTION OF ARTIFICIAL INTELLIGENCE IN INFORMATICS
Creators: name: Muradova, Kamola
Publisher: name: Zenodo
Year: 2023

description: Big Data has revolutionized the field of informatics, offering unprecedented opportunities for insights and innovation. Characterized by its volume, variety, velocity, and veracity, Big Data facilitates deep analytical capabilities, impacting sectors like healthcare, business, and government. This article explores Big Data's role in modern informatics, focusing on its applications, challenges, and future prospects. It highlights how Big Data analytics has become integral in decision-making processes, predictive modeling, and improving operational efficiencies.
Recent $α$ decay half-lives and analytic expression predictions including superheavy nuclei
Creators: name: Royer, G.
name: Zhang, H. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: New recent experimental $α$ decay half-lives have been compared with the results obtained from previously proposed formulas depending only on the mass and charge numbers of the $α$ emitter and the Q$α$ value. For the heaviest nuclei they are also compared with calculations using the Density-Dependent M3Y (DDM3Y) effective interaction and the Viola-Seaborg-Sobiczewski (VSS) formulas. The correct agreement allows us to make predictions for the $α$ decay half-lives of other still unknown superheavy nuclei from these analytic formulas using the extrapolated Q$α$ of G. Audi, A. H. Wapstra, and C. Thibault [Nucl. Phys. A729, 337 (2003)].
Ideate to Advocate : Exploring Creativity in the Statutory Advocacy Sector
Creators: name: Shepherd, William
Publisher: name: University of Central Lancashire
Year: 2025
Subjects: subject: Diffusion of Innovation
subject: Social work
subject: Innovation management
subject: Innovation
subject: Creativity
subject: Public Health

description: Statutory Advocacy (SA) in the United Kingdom is a vital component of the public service landscape, ensuring that individuals—particularly those facing complex health and social care decisions—have their voices heard and rights protected. However, the sector is increasingly constrained by limited funding and a rising volume of complex referrals. This study investigates the role of creative ideation and social innovation in enhancing service delivery and operational effectiveness within SA organisations.

Using a multiple case study approach, this research explores how statutory advocacy providers initiate, support, and embed creativity into organisational practice. It examines the enablers and barriers to innovation, identifies the organisational structures required to support creative thinking, and assesses how resources are allocated to sustain innovation in a resource-constrained environment.

Findings demonstrate that fostering a culture of creativity is fundamental to driving public sector innovation in the statutory advocacy field. The research introduces the Shepherd Ideation Model, which conceptualises two key phases in the innovation process: Creative Unlocking and Idea Landing. These phases are shown to be critical for transforming abstract ideas into implementable service improvements.

This paper makes a significant contribution to the intersection of social policy, public management, and organisational development by providing a practical and theoretical framework for encouraging innovation in advocacy services. It offers evidence-based recommendations for advocacy organisations aiming to build creative capacity, improve outcomes for service users, and develop resilient, future-ready services in an evolving socio-political landscape.
Scaler Mode Technique for the ARGO-YBJ Detector
Creators: name: al., G. Aielli et
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The ARGO-YBJ experiment has been designed to study the Extensive Air Showers with an energy threshold lower than that of the existing arrays by exploiting the high altitude location(4300 m a.s.l. in Tibet, P.R. China) and the full ground plane coverage. The lower energy limit of the detector (E $\sim$ 1 GeV) is reached by the scaler mode technique, i.e. recording the counting rate at fixed time intervals. At these energies, transient signals due to local (e.g. Forbush Decreases) and cosmological (e.g. Gamma Ray Bursts) phenomena are expected as a significant variation of the counting rate compared to the background. In this paper the performance of the ARGO-YBJ detector operating in scaler mode is described and discussed.
description: accepted for publication in Astroparticle Physics
Customizing Dataverse to workflows of ADP
Creators: name: Dolinar, Maja
name: Žibert, Gregor
Publisher: name: Zenodo
Year: 2021

description: The Slovenian Social Science Data Archives (ADP) has identified the Dataverse application as the best new option for distributing its curated catalogue, which is currently hosted on its website and on Nesstar. In addition, the application was also seen as the best way to provide additional services for self-archiving and basically as an ingest point for all studies added to the catalogue (e.g. curated and self-archived). However, it soon became apparent that the default version of Dataverse lacked many features that were essential to our workflow and the services we wanted. We have invested many resources over the last few years in customizing the default version and have tested several plugins that could be crucial (e.g. Data Curation plugin, Data Explorer plugin, Two Ravens). These include a multi-language user interface, implementation of the CMM CESSDA Metadata Model (and some ADP custom metadata fields), including DDI Controlled Vocabularies and ELSST keywords, and customization of deposit and access features (e.g., inclusion of online deposit agreements and terms of use). The paper will present our experience in customising the Dataverse software application to our needs, and identify issues and workarounds that repositories should be aware of when customising the application to their workflows.
Nonparametric estimation when data on derivatives are available
Creators: name: Hall, Peter
name: Yatchew, Adonis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 62G20 (Primary) 62P20, 91B38 (Secondary)

description: We consider settings where data are available on a nonparametric function and various partial derivatives. Such circumstances arise in practice, for example in the joint estimation of cost and input functions in economics. We show that when derivative data are available, local averages can be replaced in certain dimensions by nonlocal averages, thus reducing the nonparametric dimension of the problem. We derive optimal rates of convergence and conditions under which dimension reduction is achieved. Kernel estimators and their properties are analyzed, although other estimators, such as local polynomial, spline and nonparametric least squares, may also be used. Simulations and an application to the estimation of electricity distribution costs are included.
description: Published at http://dx.doi.org/10.1214/009053606000001127 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Design of silicon waveguides for Kerr nonlinear optical performance with graphene oxide films
Creators: name: Zhang, Yuning
name: Wu, Jiayang
name: Qu, Yang
name: Jia, Linnan
name: Jia, Baohua
name: Moss, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The Kerr nonlinear optical performance of silicon nanowire waveguides integrated with 2D layered graphene oxide (GO) films is theoretically studied and optimized based on experimentally measured linear and nonlinear optical parameters of the GO films. The strong mode overlap between the silicon nanowires and highly nonlinear GO films yields a significantly enhanced Kerr nonlinearity for the hybrid waveguides. A detailed analysis for the influence of waveguide geometry and GO film thickness on the propagation loss, nonlinear parameter, and nonlinear figure of merit (FOM) is performed. The results show that the effective nonlinear parameter and nonlinear FOM can be increased by up to 52 and 79 times relative to bare silicon nanowires, respectively. Self-phase modulation (SPM)-induced spectral broadening of optical pulses is used as a benchmark to evaluate the nonlinear performance, examining the tradeoff between enhancing Kerr nonlinearity and minimizing loss. By optimizing the device parameters to balance this, a high spectral broadening factor of 27.8 can be achieved, more than 6 times that achieved in previous experiments. Finally, the influence of pulse chirp, material anisotropy, and the interplay between saturable absorption and SPM is also discussed, together with the comparison between the spectral broadening after going through GO-coated and graphene-coated silicon waveguides. These results provide useful guidance for optimizing the Kerr nonlinear optical performance of silicon waveguides integrated with 2D layered GO films.
description: 16 pages, 12 figures, 119 references
Some Properties of Balanced Hyperbolic Compact Complex Manifolds
Creators: name: Marouani, Samir
name: Popovici, Dan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We prove several vanishing theorems for the cohomology of balanced hyperbolic manifolds that we introduced in our previous work and for the $L^2$ harmonic spaces on the universal cover of these manifolds. Other results include a Hard Lefschetz-type theorem for certain compact complex balanced manifolds and the non-existence of certain $L^1$ currents on the universal covering space of a balanced hyperbolic manifold.
description: 34 pages, to appear in International Journal of Mathematics
title: OltrePlinio Manuscripts - Digital Library’s Details (Ms. Parm. 1278)
titleType: AlternativeTitle
Creators: name: Lonati, Elisa
Publisher: name: Scuola Normale Superiore di Pisa
Year: 2021
Subjects: subject: FOS: Humanities
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Parma, Biblioteca Palatina, Complesso Monumentale della Pilotta, Ms. Parm. 1278
Analytic models of plausible gravitational lens potentials
Creators: name: Baltz, Edward A.
name: Marshall, Phil
name: Oguri, Masamune
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gravitational lenses on galaxy scales are plausibly modelled as having ellipsoidal symmetry and a universal dark matter density profile, with a Sersic profile to describe the distribution of baryonic matter. Predicting all lensing effects requires knowledge of the total lens potential: in this work we give analytic forms for that of the above hybrid model. Emphasising that complex lens potentials can be constructed from simpler components in linear combination, we provide a recipe for attaining elliptical symmetry in either projected mass or lens potential. We also provide analytic formulae for the lens potentials of Sersic profiles for integer and half-integer index. We then present formulae describing the gravitational lensing effects due to smoothly-truncated universal density profiles in cold dark matter model. For our isolated haloes the density profile falls off as radius to the minus fifth or seventh power beyond the tidal radius, functional forms that allow all orders of lens potential derivatives to be calculated analytically, while ensuring a non-divergent total mass. We show how the observables predicted by this profile differ from that of the original infinite-mass NFW profile. Expressions for the gravitational flexion are highlighted. We show how decreasing the tidal radius allows stripped haloes to be modelled, providing a framework for a fuller investigation of dark matter substructure in galaxies and clusters. Finally we remark on the need for finite mass halo profiles when doing cosmological ray-tracing simulations, and the need for readily-calculable higher order derivatives of the lens potential when studying catastrophes in strong lenses.
description: 24 pages, 10 figures, matches published version
Kink scattering in a generalized Wess-Zumino model
Creators: name: Alonso-Izquierdo, A.
name: Leon, M. A. Gonzalez
name: Vaquero, J. Martin
name: Mayado, M. de la Torre
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this paper, kink scattering in the dimensional reduction of the bosonic sector of a one-parameter family of generalized Wess-Zumino models with three vacuum points is discussed. The value of the model parameter determines the specific location of the vacua. The influence of the vacuum arrangements (evolving from three collinear vacua to three vacua placed at the vertices of an equilateral triangle) on the kink scattering is investigated. Two different regimes can be distinguished: in the first one, two symmetric BPS kinks/antikinks arise whereas in the second one a new different BPS kink/antikink emerges, with the exception of a three-fold rotational symmetry case, where the three topological defects are identical. The scattering between the two symmetric kinks is thoroughly analyzed. Two different scattering channels have been found: kink-kink reflection and kink-kink hybridization. In the last case, the collision between the two symmetric kinks gives rise to the third different kink. Resonance phenomena also appear allowing a vibrating kink to split into two symmetric kinks moving away.
description: 23 pages, 15 figures
Various facets of magnetic charge correlation: Micromagnetic and distorted waveBorn approximation simulations study
Creators: name: Yumnam, George
name: Guo, Jiasen
name: Singh, Deepak K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The emergent concept of magnetic charge quasi-particle provides a new realm to study the evolution of magnetic properties in two-dimensional artificially frustrated magnets. We report on the exploration of magnetic phases due to various magnetic charge correlation using the complementary numerical techniques of micromagnetic and distorted wave Born approximation simulations in artificial permalloy honeycomb lattice. The honeycomb element length varies between 10 nm and 100 nm, while the width and thickness are kept within the single domain limit. In addition to the charge ordered loop state, we observe disordered charge arrangement, characterized by the random distribution of $\pm$Q charges, in single domain size honeycomb lattice. As the length of honeycomb element increases, low multiplicity magnetic charges tend to form contiguous bands in thinner lattice. Thin honeycomb lattice with 100 nm element length exhibits a perfect spin ice pattern, which remains unaffected to the modest increase in the width of element size. We simulate scattering profiles under the pretext of distorted wave Born approximation formalism for the micromagnetic phases. The results are expected to provide useful guidance in the experimental investigation of magnetic phases in artificial honeycomb magnet.
description: 9 pages, 6 figures
Dispersal timescale of protoplanetary disks in the low-metallicity young cluster Dolidze 25
Creators: name: Guarcello, M. G.
name: Biazzo, K.
name: Drake, J. J.
name: Micela, G.
name: Prisinzano, L.
name: Sciortino, S.
name: Damiani, F.
name: Flaccomio, E.
name: Neiner, C.
name: Wright, N. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The dispersal of protoplanetary disks sets the timescale available for planets to assemble, and thus it is one of the fundamental parameters in theories of planetary formation. Disk dispersal is determined by several properties of the central star, the disk itself, and the surrounding environment. In particular, the metallicity of disks may impact their evolution, even if to date controversial results exist: in low-metallicity clusters disks seem to rapidly disperse, while in the Magellanic Clouds some evidence supports the existence of accreting disks few tens of Myrs old. In this paper we study the dispersal timescale of disks in Dolidze~25, the young cluster in proximity of the Sun with lowest metallicity, with the aim of understanding whether disk evolution is impacted by the low-metallicity of the cluster. We have analyzed Chandra/ACIS-I observations of the cluster and combined the resulting source catalog with existing optical and infrared catalogs of the region. We selected the disk-bearing population and the disk-less population of Dolidze 25. We have derived stellar parameters from isochrones fitted to color-magnitude diagrams. We derived a disk fraction of about 34% and a median age of 1.2 Myrs. By comparing this estimate with existing estimates of the disk fraction of clusters younger than 10 Myrs, our study suggests that the disk fraction of Dolidze 25 is lower than what is expected from its age alone. Even if our results are not conclusive given the intrinsic uncertainty on stellar ages estimated from isochrones fitting to color-magnitude diagrams, we suggest that disk evolution in Dolidze 25 may be impacted by the environment. Given the poor O star population and low stellar density of the cluster, it is more likely that disks dispersal timescale is dictated more by the low metallicity of the cluster rather than external photoevaporation or dynamical encounters.
description: Accepted for publication by Astronomy & Astrophysics
Precise measurement of the top quark mass from lepton+jets events at D0
Creators: name: D0 Collaboration
name: Abazov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We measure the mass of the top quark using top quark pair candidate events in the lepton+jets channel from data corresponding to 1 fb-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider. We use a likelihood technique that reduces the jet energy scale uncertainty by combining an in-situ jet energy calibration with the independent constraint on the jet energy scale (JES) from the calibration derived using photon+jets and dijet samples. We find the mass of the top quark to be 171.5+-1.8(stat.+JES)+-1.1(syst.) GeV.
description: submitted to Phys. Rev. Letters
Pendellosung effect in photonic crystals
Creators: name: Savo, S.
name: Di Gennaro, E.
name: Miletto, C.
name: Andreone, A.
name: Dardano, P.
name: Moretti, L.
name: Mocella, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: At the exit surface of a photonic crystal, the intensity of the diffracted wave can be periodically modulated, showing a maximum in the "positive" (forward diffracted) or in the "negative" (diffracted) direction, depending on the slab thickness. This thickness dependence is a direct result of the so-called Pendellosung phenomenon, consisting of the periodic exchange inside the crystal of the energy between direct and diffracted beams. We report the experimental observation of this effect in the microwave region at about 14 GHz by irradiating 2D photonic crystal slabs of different thickness and detecting the intensity distribution of the electromagnetic field at the exit surface and inside the crystal itself.
description: 9 pages, 6 figures, accepted on Optics Express
Electric-field induced spin excitations in two-dimensional spin-orbit coupled systems
Creators: name: Kleinert, P.
name: Bryksin, V. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Rigorous coupled spin-charge drift-diffusion equations are derived from quantum-kinetic equations for the spin-density matrix that incorporate effects due to k-linear spin-orbit interaction, an in-plane electric field, and the elastic scattering on nonmagnetic impurities. The explicit analytical solution for the induced magnetization exhibits a pole structure, from which the dispersion relations of spin excitations are identified. Applications of the general approach refer to the excitation of long-lived field-induced spin waves by optically generated spin and charge patterns. This approach transfers methods known in the physics of space-charge waves to the treatment of spin eigenmodes. In addition, the amplification of an oscillating electric field by spin injection is demonstrated.
description: 17 pages, 3 figures
Single hole and vortex excitations in the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice
Creators: name: Ribeiro, Hugo
name: Bieri, Samuel
name: Ivanov, Dmitri
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice with one mobile hole (monomer) at the Rokhsar-Kivelson point. The motion of the hole is described by two branches of excitations: the hole may either move with or without a trapped Z2 vortex (vison). We perform a study of the hole dispersion in the limit where the hole hopping amplitude is much smaller than the interdimer interaction. In this limit, the hole without vison moves freely and has a tight-binding spectrum. On the other hand, the hole with a trapped vison is strongly constrained due to interference effects and can only move via higher-order virtual processes.
description: 4 pages, 4 figures; minor changes, replaced by published version
Final state sensitivity in noisy chaotic scattering
Creators: name: Nieto, Alexandre R.
name: Seoane, Jesús M.
name: Sanjuán, Miguel A. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The unpredictability in chaotic scattering problems is a fundamental topic in physics that has been studied either in purely conservative systems or in the presence of weak perturbations. In many systems noise plays an important role in the dynamical behavior and it models their internal irregularities or their coupling with the environment. In these situations the unpredictability is affected by both the chaotic dynamics and the stochastic fluctuations. In the presence of noise two trajectories with the same initial condition can evolve in different ways and converge to a different asymptotic behavior. For this reason, even the exact knowledge of the initial conditions does not necessarily lead to the predictability of the final state of the system. Hence, the noise can be considered as an important source of unpredictability that cannot be fully understood using the conventional methods of nonlinear dynamics, such as the exit basins and the uncertainty exponent. By adopting a probabilistic point of view, we develop the concepts of probability basin, uncertainty basin and noise-sensitivity exponent, that allow us to carry out both a quantitative and qualitative analysis of the unpredictability on noisy chaotic scattering problems.
description: 18 pages, 8 figures
Elucidation of Conformational Hysteresis on a Giant DNA
Creators: name: Shew, Chwen-Yang
name: Higuchi, Yuji
name: Yoshikawa, Kenichi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The conformational behavior of a giant DNA mediated by condensing agents in the bulk solution has been investigated through experimental and theoretical approaches. Experimentally, a pronounced conformational hysteresis is observed for folding and unfolding processes, by increasing and decreasing the concentration of condensing agent PEG (Polyethylene glycol), respectively. To elucidate the observed hysteresis, a semiflexible chain model is studied by using Monte Carlo simulations for the coil-globule transition. In the simulations, the hysteresis loop emerges for stiff enough chains, indicating distinct pathways for folding and unfolding processes. Also, our results show that globular state is thermodynamically more stable than coiled state in the hysteresis loop. Our findings suggest that increasing chain stiffness may reduce the chain conformations relevant to the folding pathway, which impedes the folding process.
description: 21 pages, 7 figures
Sgr A* X-ray flares from non-thermal particle acceleration in a magnetically arrested disc
Creators: name: Scepi, Nicolas
name: Dexter, Jason
name: Begelman, Mitchell C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Sgr A* exhibits flares in the near-infrared and X-ray bands, with the luminosity in these bands increasing by factors of $10-100$ for $\approx 60$ minutes. One of the models proposed to explain these flares is synchrotron emission of non-thermal particles accelerated by magnetic reconnection events in the accretion flow. We use the results from PIC simulations of magnetic reconnection to post-process 3D two-temperature GRMHD simulations of a magnetically arrested disc (MAD). We identify current sheets, retrieve their properties, estimate their potential to accelerate non-thermal particles and compute the expected non-thermal synchrotron emission. We find that the flux eruptions of MADs can provide suitable conditions for accelerating non-thermal particles to energies $γ_e \lesssim 10^6$ and producing simultaneous X-ray and near-infrared flares. For a suitable choice of current-sheet parameters and a simpified synchrotron cooling prescription, the model can simultaneously reproduce the quiescent and flaring X-ray luminosities as well as the X-ray spectral shape. While the near-infrared flares are mainly due to an increase in the temperature near the black hole during the MAD flux eruptions, the X-ray emission comes from narrow current sheets bordering highly magnetized, low-density regions near the black hole and equatorial current sheets where the flux on the black hole reconnects. As a result, not all infrared flares are accompanied by X-ray ones. The non-thermal flaring emission can extend to very hard ($\lesssim 100$ keV) X-ray energies.
description: 12 pages, 8 Figures, Accepted for publication in MNRAS
BOLANING ADAPTIV TA'LIM-TARBIYA JARAYONLARIGA TAYYORLASHDA KUZATISH VA NAZORAT QILISH DASTURI
Creators: name: Fozilova, Odina
name: Oripova, Maxliyo
Publisher: name: Zenodo
Year: 2023

description: Ta’lim moslashtirilgan ta’lim muhiti tomon paradigma o‘zgarishini boshdan kechirar ekan, ushbu ilmiy maqola bolalarni dinamik ta’lim jarayonlariga tayyorlash uchun mo‘ljallangan monitoring va nazorat dasturining amalga oshirilishi va samaradorligini o‘rganadi. Kognitiv rivojlanish, texnologiya takomillashtirilgan ta’lim va individual farqlarning o‘rnatilgan nazariyalariga tayangan holda, bizning tadqiqotimiz moslashtirilgan ta’lim tajribasini yaratish uchun shaxsiylashtirilgan ta’lim strategiyalari va real vaqt monitoringining integratsiyasini o‘rganadi. Ushbu tadqiqot inklyuziv va moslashuvchan ta’lim muhitini yaratishga intilayotgan o‘qituvchilar, tadqiqotchilar va siyosatchilar uchun tushunchalar berib, ta’lim innovatsiyasi bo‘yicha davom etayotgan nutqlarga hissa qo‘shadi.
Newtonian nonlinear hydrodynamics and magnetohydrodynamics
Creators: name: Spyrou, N. K.
name: Tsagas, C. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use covariant methods to analyse the nonlinear evolution of self-gravitating, non-relativistic media. The formalism is first applied to imperfect fluids, aiming at the kinematic effects of viscosity, before extended to inhomogeneous magnetised environments. The nonlinear electrodynamic formulae are derived and successively applied to electrically resistive and to highly conductive fluids. By nature, the covariant equations isolate the magnetic effects on the kinematics and the dynamics of the medium, combining mathematical transparency and physical clarity. Employing the Newtonian analogue of the relativistic 1+3 covariant treatment, also facilitates the direct comparison with the earlier relativistic studies and helps to identify the differences in an unambiguous way. The purpose of this work is to set the framework and take a first step towards the detailed analytical study of complex nonlinear systems, like non-relativistic astrophysical plasmas and collapsing protogalactic clouds.
description: Typos corrected, references added and updated (MNRAS in press)
Why powerful economic content and scientific language in social studies textbooks matters
Creators: name: Modig, Niclas
Publisher: name: JSSE - Journal of Social Science Education
Year: 2021

description: • The use of scientific economic terms is insufficient in Swedish social studies textbooks. • Analysed textbooks do not offer optimal preconditions to develop in-depth economic knowledge. • Insufficient use of economic terms may have negative impact on cumulative knowledge building. • The insufficient use of economic terms may also lead to unequal economic education. Purpose: This article examines the prevalence of six economic terms in 17 Swedish upper-secondary school textbooks and how the language shifts between everyday and scientific language. Variations regarding content in the textbooks used in vocational programmes and preparatory programmes for higher education are also investigated. Design: Powerful knowledge (important knowledge within a subject) and semantic waves (variations between everyday and scientific language) are essential to cumulative knowledge building. These theories are used for quantitative and qualitative analyses of the textbooks. Findings: There are variations in the extent to which powerful economic terms appear and how the language shifts between everyday and scientific discourses in the textbooks analysed.Coverage and shifts are generally insufficient in textbooks used in vocational programmes. Practical implications: The importance of using powerful economic knowledge and shifting between everyday and scientific language in textbooks and teaching should be highlighted for policymakers, textbook authors and teacher educators.
description: JSSE - Journal of Social Science Education, Bd. 20 Nr. 5 (2021): Advance Access
Performance of an Enhanced Afterloader with Electromagnetic Tracking Capabilities for Channel Reconstruction and Error Detection
Creators: name: Tho, Daline
name: Lavallée, Marie-Claude
name: Beaulieu, Luc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: The reconstruction and error detection performance of a Flexitron research unit equipped with a special check-cable in which is integrated an EM sensor (NDI Aurora V3) that enables tracking and reconstruction capability was assessed. Reconstructions of a 24 cm long catheter were performed using two methods: continuous fixed speed check cable backward stepping and stepping through each dwell position every 1mm. The ability of the system to differentiate between two closely located (parallel) catheters was investigated by connecting catheters to the afterloader and moving it from its axis with an increment of 1mm. A robotic arm was used to move the catheter between each reconstruction. Reconstructions were obtained with a locally weighted scatter-plot smoothing algorithm. To quantify the reconstruction accuracy, distances between two catheters were computed along the reconstruction track with a 5mm step. Reconstructions of curve catheter paths were assessed through parallel and perpendicular phantom configuration to the EM field generator. Indexer length and lateral error were simulated and ROC analysis was made. Using a 50cm/s check cable speed does not allow accurate reconstruction. A slower check cable speed results in better reconstruction performance and smaller standard deviations. The optimum operating distance from the field generator (50-300mm) resulted in a lower absolute mean deviation from the expected value (0.2pm0.1mm) versus being positioned on the edge of the electromagnetic sensitive detection volume (0.6pm0.3mm). Reconstructions of curved and circular paths with a check cable speed under 5cm/s gave a 0.8pm0.5mm error, or better. All indexer and lateral shifts of 1mm were detected with a check cable speed of 2.5cm/s or under. A speed under 5cm/s is recommended for straight and curved catheter reconstructions. The check cable can also be used to detect common shift errors.
PSR J1453+1902 and the radio luminosities of solitary versus binary millisecond pulsars
Creators: name: Lorimer, D. R.
name: McLaughlin, M. A.
name: Champion, D. J.
name: Stairs, I. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present 3 yr of timing observations for PSR J1453+1902, a 5.79-ms pulsar discovered during a 430-MHz drift-scan survey with the Arecibo telescope. Our observations show that PSR J1453+1902 is solitary and has a proper motion of 8(2) mas/yr. At the nominal distance of 1.2 kpc estimated from the pulsar's dispersion measure, this corresponds to a transverse speed of 46(11) km/s, typical of the millisecond pulsar population. We analyse the current sample of 55 millisecond pulsars in the Galactic disk and revisit the question of whether the luminosities of isolated millisecond pulsars are different from their binary counterparts. We demonstrate that the apparent differences in the luminosity distributions seen in samples selected from 430-MHz surveys can be explained by small-number statistics and observational selection biases. An examination of the sample from 1400-MHz surveys shows no differences in the distributions. The simplest conclusion from the current data is that the spin, kinematic, spatial and luminosity distributions of isolated and binary millisecond pulsars are consistent with a single homogeneous population.
description: 8 pages, 5 figures and 3 tables, accepted for publication by MNRAS
A public turbulence database cluster and applications to study Lagrangian evolution of velocity increments in turbulence
Creators: name: Li, Yi
name: Perlman, Eric
name: Wan, Minping
name: Yang, Yunke
name: Meneveau, Charles
name: Burns, Randal
name: Chen, Shiyi
name: Szalay, Alexander
name: Eyink, Gregory
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A public database system archiving a direct numerical simulation (DNS) data set of isotropic, forced turbulence is described in this paper. The data set consists of the DNS output on $1024^3$ spatial points and 1024 time-samples spanning about one large-scale turn-over timescale. This complete $1024^4$ space-time history of turbulence is accessible to users remotely through an interface that is based on the Web-services model. Users may write and execute analysis programs on their host computers, while the programs make subroutine-like calls that request desired parts of the data over the network. The users are thus able to perform numerical experiments by accessing the 27 Terabytes of DNS data using regular platforms such as laptops. The architecture of the database is explained, as are some of the locally defined functions, such as differentiation and interpolation. Test calculations are performed to illustrate the usage of the system and to verify the accuracy of the methods. The database is then used to analyze a dynamical model for small-scale intermittency in turbulence. Specifically, the dynamical effects of pressure and viscous terms on the Lagrangian evolution of velocity increments are evaluated using conditional averages calculated from the DNS data in the database. It is shown that these effects differ considerably among themselves and thus require different modeling strategies in Lagrangian models of velocity increments and intermittency.
description: 30 pages, 21 figures. Submitted for consideration in the Journal of Turbulence 2008
New universality classes of the non-Hermitian Dirac operator in QCD-like theories
Creators: name: Kanazawa, Takuya
name: Wettig, Tilo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In non-Hermitian random matrix theory there are three universality classes for local spectral correlations: the Ginibre class and the nonstandard classes $\mathrm{AI}^\dagger$ and $\mathrm{AII}^\dagger$. We show that the continuum Dirac operator in two-color QCD coupled to a chiral $\mathrm{U}(1)$ gauge field or an imaginary chiral chemical potential falls in class $\mathrm{AI}^\dagger$ ($\mathrm{AII}^\dagger$) for fermions in pseudoreal (real) representations of $\mathrm{SU}(2)$. We introduce the corresponding chiral random matrix theories and verify our predictions in lattice simulations with staggered fermions, for which the correspondence between representation and universality class is reversed. Specifically, we compute the complex eigenvalue spacing ratios introduced recently. We also derive novel spectral sum rules.
description: 11 pages, 9 figures
COLOR CAREGORY AS A LINGUISTIC OBJECT.
Creators: name: Khayitova, Dilshoda
name: Umarova, Nargiza
Publisher: name: Zenodo
Year: 2023

description: In this article refers to the cognitive peculiarities of color names are a fascinating aspect of human perception and language. The way we categorize and name colors can be influenced by various cognitive processes, linguistic factors, and cultural elements of the world of colors and the relationship between color and emotional perception.
N=4 Chern-Simons theories with auxiliary vector multiplets
Creators: name: Imamura, Yosuke
name: Kimura, Keisuke
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate a class of quiver-type Chern-Simons gauge theories with some Chern-Simons couplings vanishing. The vanishing of the couplings means that the corresponding vector fields are auxiliary fields. We show that these theories possess N=4 supersymmetry by writing down the actions and the supersymmetry transformation in terms of component fields in manifestly Spin(4) covariant form.
description: 20 pages, no figures; eq (70) corrected