cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploration of methods for using SACADA data to estimate HEPs: Final Report
Creators: name: Smith, Reuel
name: Modavi, Ramin
name: Groth, Katrina M.
Publisher: name: Digital Repository at the University of Maryland
Year: 2018
Subjects: HRA data
Bayesian updating
SACADA
Bayesian Networks

description: This report provides summary of the project "Exploration of methods for using SACADA data to estimate HEPs." The goal of the project was to conduct exploratory research on how to use the U.S. Nuclear Regulatory Commission's SACADA (Scenario, Authoring, Characterization, and Debriefing Application) database to develop an algorithm for estimating human error probabilities (HEPs). The approach used by the University of Maryland SyRRA lab uses a combination of Bayesian statistical methods and Bayesian Network models to conduct data analysis on SACADA data and to construct hybrid models informed by both data and engineering models. The end results provided various algorithms for mapping and binning SACADA data to be used within HEP estimation, and demonstrated a variety of options which create a framework for streamlined updating of HEPs as the amount and variety of SACADA data increases. This report summarizes the project's major accomplishments, and gathers the abstracts and references for the publication submissions and reports that were prepared as part of this work.
Anomaly Mediation, Fayet-Iliopoulos D-terms and the Renormalisation Group
Creators: name: Hodgson, R.
name: Jack, I.
name: Jones, D. R. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address renormalisation group evolution issues that arise in the Anomaly Mediated Supersymmetry Breaking scenario when the tachyonic slepton problem is resolved by Fayet-Iliopoulos term contributions. We present typical sparticle spectra both for the original formulation of this idea and an alternative using Fayet-Iliopoulos terms for a U(1) compatible with a straightforward GUT embedding.
description: 20 pages, 2 figures
Event-related brain potentials recorded during performance of a perceptual-motor task
Creators: name: Jutai, Jeffrey William
Publisher: name: University of British Columbia
Year: 2010

description: This thesis examined the event-related brain potentials recorded while subjects perform a continuous involvement perceptual-motor task. It was found that potentials associated with psychological processes of anticipation and selective attention could be reliably measured. A post-stimulus negative shift observed in response to attended stimuli was found to be composed of two types of electrocortical activity. The first and earliest to appear was sensitive to the difference between channels (i.e. ears) carrying relevant and irrelevant auditory information. The second was sensitive to the direction in which subjects oriented their attention during the task. Between 200 msec and 300 msec after stimulus onset, these two activities or processes interacted such that the electrocortical effect of selective attention became largest in the cerebral hemisphere contralateral to the direction of orientation. Predicted relationships between brain potentials and task performance on a trial-to-trial basis were not found. The results are discussed in terms of the current understanding of the electrophysiology of human attention.
Quantum-Hall activation gaps in graphene
Creators: name: Giesbers, A. J. M.
name: Zeitler, U.
name: Katsnelson, M. I.
name: Ponomarenko, L. A.
name: Mohiuddin, T. M. G.
name: Maan, J. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have measured the quantum-Hall activation gaps in graphene at filling factors $ν=2$ and $ν=6$ for magnetic fields up to 32 T and temperatures from 4 K to 300 K. The $ν=6$ gap can be described by thermal excitation to broadened Landau levels with a width of 400 K. In contrast, the gap measured at $ν=2$ is strongly temperature and field dependent and approaches the expected value for sharp Landau levels for fields $B > 20$ T and temperatures $T > 100$ K. We explain this surprising behavior by a narrowing of the lowest Landau level.
description: 4 pages, 4 figures, updated version after review, accepted for PRL
Laser Frequency Noise in Next Generation Gravitational-Wave Detectors
Creators: name: Cahillane, Craig
name: Mansell, Georgia
name: Sigg, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Future ground-based gravitational-wave detectors are slated to detect black hole and neutron star collisions from the entire stellar history of the universe. To achieve the designed detector sensitivities, frequency noise from the laser source must be reduced below the level achieved in current Advanced LIGO detectors. This paper reviews the laser frequency noise suppression scheme in Advanced LIGO, and quantifies the noise coupling to the gravitational-wave readout. The laser frequency noise incident on the current Advanced LIGO detectors is $8 \times 10^{-5}~\mathrm{Hz/\sqrt{Hz}}$ at $1~\mathrm{kHz}$. Future detectors will require even lower incident frequency noise levels to ensure this technical noise source does not limit sensitivity. The frequency noise requirement for a gravitational wave detector with arm lengths of $40~\mathrm{km}$ is estimated to be $7 \times 10^{-7}~\mathrm{Hz/\sqrt{Hz}}$. To reach this goal a new frequency noise suppression scheme is proposed, utilizing two input mode cleaner cavities, and the limits of this scheme are explored. Using this scheme the frequency noise requirement is met, even in pessimistic noise coupling scenarios.
description: 17 pages, 6 Figures
The Changing Image of Zeus in Olympia
Creators: name: Barringer, Judith
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Olympia
subject: Elis
subject: Zeus
subject: Keraunios
subject: votive

description: Archäologischer Anzeiger, 1. Halbband 2015
description: Images of Zeus Keraunios dominate the visual representations of Zeus at Olympia throughout the archaic period and down to the 470s B.C., and this is especially true for military victory monuments erected in the Altis. In the 470s B.C., however, such images cease to appear, and military votives thereafter employ a serene and regal standing or seated image of the god. The change can be explained by a new role for Zeus and Olympia in the aftermath of the Persian Wars: as arbitrator of disputes between Greek poleis, as evidenced by a previously published inscription ca. 476–472 B.C. In accordance with this development, Zeus now acts as arbitrator in his visual manifestations at Olympia.
New Blue and Red Variable Stars in NGC 247
Creators: name: Davidge, T. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Images recorded with the Gemini Multi-Object Spectrograph (GMOS) on Gemini South are combined with archival images from other facilities to search for variable stars in the southern portion of the nearby disk galaxy NGC 247. Fifteen new periodic and non-periodic variables are identified. These include three Cepheids with periods < 25 days, four semi-regular variables, one of which shows light variations similar to those of R CrB stars, five variables with intrinsic visible/red brightnesses and colors that are similar to those of luminous blue variables (LBVs), and three fainter blue variables, one of which may be a non-eclipsing close binary system. The S Doradus instability strip defines the upper envelope of a distinct sequence of objects on the (i', g'-i') color-magnitude diagram (CMD) of NGC 247. The frequency of variability with an amplitude > 0.1 magnitude in the part of the CMD that contains LBVs over the seven month period when the GMOS images were recorded is ~ 0.2. The light curve of the B[e] supergiant J004702.18--204739.9, which is among the brightest stars in NGC 247, is also examined. Low amplitude variations on day-to-day timescales are found, coupled with a systematic trend in mean brightness over a six month time interval.
description: Accepted for publication in the Astronomical Journal
Self-repair
Creators: name: Mostovaia, Irina
name: Pfeiffer, Martin
Publisher: name: OSF
Year: 2022
Subjects: Conversation Analysis
Encyclopedia
Ethnomethodology
Interactional Linguistics

description: Self-repair refers to the collection of practices which give the speaker the opportunity to deal with a part of their own talk that either the speaker (self-initiation) or the recipient (other-initiation) treats as problematic.
Non-thermal emission from supernova shock breakout and the origin of the X-ray transient associated with SN2008D
Creators: name: Wang, Xiang-Yu
name: Li, Zhuo
name: Waxman, Eli
name: Meszaros, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We suggest that non-thermal emission can be produced by multiple scatterings of the photons between the supernova ejecta and pre-shock material in supernova shock breakout. Such bulk-Comptonization process may significantly change the original thermal photon spectrum, forming a power-law non-thermal component at higher energies. We then show that the luminous X-ray outburst XRO081009 associated with SN2008D is likely to be such shock breakout emission from an ordinary type Ib/c supernova.
description: 6 pages, 1 figure, based on the talk given by Xiang-Yu Wang at the "2008 Nanjing GRB Conference" (evening focused discussion), To appear in the "2008 Nanjing GRB Conference" conference proceedings
New trends in indoor positioning based on WiFi and machine learning: A systematic review
Creators: name: Bellavista-Parent, Vladimir
name: Torres-Sospedra, Joaquín
name: Perez-Navarro, Antoni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Currently there is no standard indoor positioning system, similar to outdoor GPS. However, WiFi signals have been used in a large number of proposals to achieve the above positioning, many of which use machine learning to do so. But what are the most commonly used techniques in machine learning? What accuracy do they achieve? Where have they been tested? This article presents a systematic review of works between 2019 and 2021 that use WiFi as the signal for positioning and machine learning models to estimate indoor position. 64 papers have been identified as relevant, which have been systematically analyzed for a better understanding of the current situation in different aspects. The results show that indoor positioning based on WiFi trends use neural network-based models, evaluated in empirical experiments. Despite this, many works still conduct an assessment in small areas, which can influence the goodness of the results presented.
description: to appear in 2021 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 29 Nov. - 2 Dec. 2021, Lloret de Mar, Spain
Half BPS states in AdS_5 x Y^{p,q}
Creators: name: Gava, Edi
name: Narain, Kumar S.
name: Milanesi, Giuseppe
name: O'Loughlin, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a class of solutions of IIB Supergravity which are asymptotically AdS_5 x Y^{p,q}. They have an R x SO(4) x SU(2) x U(1) isometry and preserve half of the 8 supercharges of the background geometry. They are described by a set of second order differential equations that we have found and analysed in a previous paper, where we studied 1/8 BPS states in the maximally supersymmetric AdS_5 x S^5 background. These geometries correspond to certain chiral primary operators of the N=1 superconformal quiver theories, dual to IIB theory on AdS_5 x Y^{p,q}. We also show how to recover the AdS_5 x Y^{p,q} backgrounds by suitably doubling the number of preserved supersymmetries. We then solve the differential equations perturbatively in a large AdS_5 radius expansion, imposing asymptotic AdS_5 x Y^{p,q} boundary conditions. We compute the global baryonic and mesonic charges, including the R-charge. As for the computation of the mass, i.e. the conformal dimension D of the dual field theory operators, which is notoriously subtle in asymptotically AdS backgrounds, we adopt the general formalism due to Wald and collaborators, which gives a finite result, and verify the relation D=3 R / 2, demanded by the N=1 superconformal algebra.
description: 31 pages. Added references, enlarged discussions
Proximity-induced spin-polarized magnetocaloric effect in transition metal dichalcogenides
Creators: name: Cortés, Natalia
name: Peña, Francisco J.
name: Negrete, Oscar
name: Vargas, Patricio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore proximity-induced magnetocaloric effect (MCE) on transition metal dichalcogenides, focusing on a two-dimensional (2D) MoTe$_2$ monolayer deposited on a ferromagnetic semiconductor EuO substrate connected to a heat source. We model this heterostructure using a tight-binding model, incorporating exchange and Rashba fields induced by proximity to EuO, and including temperature through Fermi statistics. The MCE is induced on the 2D MoTe$_2$ layer due to the EuO substrate, revealing large spin-polarized entropy changes for energies out of the band gap of the MoTe$_2$-EuO system. By gating the chemical potential, the MCE can be tuned to produce heating for spin up and cooling for spin down across the $K$ and $K'$ valley splitting in the valence band, whereas either heats or cools for both spins in the conduction band. The Rashba field enhances the MCE in the valence zone while decreasing it in the conduction bands. The exchange field-induced MCE could be useful to produce tunable spin-polarized thermal responses in magnetic proximitized 2D materials.
description: 6 pages, 5 figures
Non-thermal recombination - a neglected source of flare hard X-rays and fast electron diagnostic
Creators: name: Brown, John C.
name: Mallik, Procheta C. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context. Flare Hard X-Rays (HXRs) from non-thermal electrons are commonly treated as solely bremsstrahlung (f-f), recombination (f-b) being neglected. This assumption is shown to be substantially in error, especially in hot sources, mainly due to recombination onto Fe ions. Aims. We analyse the effects on HXR spectra and electron diagnostics by including non-thermal recombination onto heavy elements in our model. Methods. Using Kramers hydrogenic cross sections with effective Z, we calculate f-f and f-b spectra for power-law electron spectra, in both thin and thick target limits, and for Maxwellians, with summation over all important ions. Results. We find that non-thermal electron recombination, especially onto Fe, must, in general, be included together with f-f, for reliable spectral interpretation, when the HXR source is hot. f-b contribution is greatest when the electron spectral index is large, and any low energy cut-off small. f-b spectra recombination edges mean a cut-off in F(E) appears as a HXR feature at Photon energy = Ec + Vz, offering an Ec diagnostic. Including f-b lowers, greatly in some cases, the F(E) needed for prescribed HXR fluxes and, even when small, seriously distorts F(E) as inferred by inversion or forward fitting based on f-f alone. Conclusions. f-b recombination from non-thermal electrons can be an important contributor to HXR spectra and should be included in spectral analyses, especially for hot sources. Accurate results will require use of better cross sections than ours and consideration of source ionisation structure.
description: 13 pages, 2 tables, 9 figures, Accepted for publication in A&A
Self assembly of model surfactants as reverse micelles in nonpolar solvents and their role as interfacial tension modifiers
Creators: name: Mayoral, E.
name: Arcos-Casarrubias, J. A.
name: Goicochea, A. Gama
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The self assembly of linear surfactants into reverse micelles (RMs) in nonpolar solvents and their efficiency in reducing the interfacial tension is studied using dissipative particle dynamics simulations. Given the importance of RMs as thickeners, among many other applications, their properties are studied here when formed in oil and in supercritical carbon dioxide (scCO2). Our simulations are found to be in agreement with experimental results of surfactant self assembly in scCO2 that found viscosity increments of up to 90 percent with 10 wt percent of surfactants. The role played by a small number of water molecules in RM formation is studied as well in both solvents, corroborating experiments reporting the enhancement of RM formation with the addition of a small quantity of water. The dynamics of water surfactant aggregation in nonpolar solvents is also discussed. Lastly, the performance of the model surfactant as an interfacial tension modifier is studied in detail. The results show that RMs are more easily formed in oil than in scCO2 and that the effectiveness of the surfactant in reducing the interfacial tension lies in its preference to adsorb at interfaces rather than self association.
description: 30 pages, 11 figures
Amtswechsel an der Spitze des Deutschen Archäologischen Instituts
Creators: name: DAI, DAI
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Festrede

description: Archäologischer Anzeiger, 1. Halbband 2008
description: Festakt anläßlich des Amtswechsels an der Spitze des DAI: - Ansprache des Bundesministers des Auswärtigen der Bundesrepublik Deutschland, Dr. Frank-Walter Steinmeier - Ansprache des scheidenden Präsidenten, Professor Dr. Dr. h. c. mult. Hermann Parzinger - Ansprache des Nachfolgers des Präsidenten, Professor Dr. Hans-Joachim Gehrke
All-Inorganic Spin-Cast Nanoparticle Solar Cells with Non-Selective Electrodes
Creators: name: Anderson, I. E.
name: Olson, J. D.
name: Yang, L.
name: Carter, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-cast all-inorganic nanoparticle solutions have been used to make a CdTe/CdSe solar cell with an efficiency of up to 2.8% without alumina or calcium buffer layers. The type of junction and non-selective nature of the contacts made to these devices is explored.
Contributions of Transformer Attention Heads in Multi- and Cross-lingual Tasks
Creators: name: Ma, Weicheng
name: Zhang, Kai
name: Lou, Renze
name: Wang, Lili
name: Vosoughi, Soroush
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper studies the relative importance of attention heads in Transformer-based models to aid their interpretability in cross-lingual and multi-lingual tasks. Prior research has found that only a few attention heads are important in each mono-lingual Natural Language Processing (NLP) task and pruning the remaining heads leads to comparable or improved performance of the model. However, the impact of pruning attention heads is not yet clear in cross-lingual and multi-lingual tasks. Through extensive experiments, we show that (1) pruning a number of attention heads in a multi-lingual Transformer-based model has, in general, positive effects on its performance in cross-lingual and multi-lingual tasks and (2) the attention heads to be pruned can be ranked using gradients and identified with a few trial experiments. Our experiments focus on sequence labeling tasks, with potential applicability on other cross-lingual and multi-lingual tasks. For comprehensiveness, we examine two pre-trained multi-lingual models, namely multi-lingual BERT (mBERT) and XLM-R, on three tasks across 9 languages each. We also discuss the validity of our findings and their extensibility to truly resource-scarce languages and other task settings.
description: In ACL 2021
Méthodologie de modélisation et d'implémentation d'adaptateurs spatio-temporels
Creators: name: Chavet, Cyrille
name: Coussy, Philippe
name: Urard, Pascal
name: Martin, Eric
Publisher: name: arXiv
Year: 2007
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: The re-use of pre-designed blocks is a well-known concept of the software development. This technique has been applied to System-on-Chip (SoC) design whose complexity and heterogeneity are growing. The re-use is made thanks to high level components, called virtual components (IP), available in more or less flexible forms. These components are dedicated blocks: digital signal processing (DCT, FFT), telecommunications (Viterbi, TurboCodes),... These blocks rest on a model of fixed architecture with very few degrees of personalization. This rigidity is particularly true for the communication interface whose orders of acquisition and production of data, the temporal behavior and protocols of exchanges are fixed. The successful integration of such an IP requires that the designer (1) synchronizes the components (2) converts the protocols between "incompatible" blocks (3) temporizes the data to guarantee the temporal constraints and the order of the data. This phase remains however very manual and source of errors. Our approach proposes a formal modeling, based on an original Ressource Compatibility Graph. The synthesis flow is based on a set of transformations of the initial graph to lead to an interface architecture allowing the space-time adaptation of the data exchanges between several components.
Supplementary document for Ultraviolet vertical thin-film light-emitting diode - 7207008.pdf
Creators: name: xie, mingyuan
name: Gao, Xiang
name: Jiang, Yan
name: tang, xianwu
name: Qin, Feifei
name: Gao, Xumin
name: Yuan, Jialei
name: shi, zheng
name: Wang, Yongjin
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: ULTRAVIOLET VERTICAL THIN-FILM LIGHT-EMITTING DIODE: SUPPLEMENTAL DOCUMENT
Chern numbers and diffeomorphism types of projective varieties
Creators: name: Kotschick, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 57R20

description: In 1954 Hirzebruch asked which linear combinations of Chern numbers are topological invariants of smooth complex projective varieties. We give a complete answer to this question in small dimensions, and also prove partial results without restrictions on the dimension.
description: minor edits; to appear in the Journal of Topology
Electronic Supplementary - Fluorescence in Cryptochirids
Creators: name: Bähr, Susanne
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 310499
subject: Evolutionary biology not elsewhere classified

description: This project investigates the diversity and evolution of fluorescence in coral-dwelling gall crabs (Cryptochiridae) from the Red Sea and Indian Ocean. Using a combination of morphological trait analysis and phylogenomics, we identified distinct fluorescent morphologies and demonstrated that fluorescence evolved independently across multiple lineages. The Electronic Supplementary Materials (ESM) provide supporting data, including a map of sampling locations, imaging workflows, statistical analyses (FAMD, HCPC), field observations, phylogenetic summaries, and videos of fluorescent gall crabs. These materials offer further insights into the methodologies and key findings, enhancing understanding of fluorescence as an adaptive trait in marine invertebrates.
Nonclassicality of single quantum excitation of a thermal field in thermal environments
Creators: name: Li, Shang-Bin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The nonclassicality of single photon-added thermal states in the thermal channel is investigated by exploring the volume of the negative part of the Wigner function. The Wigner functions become positive when the decay time exceeds a threshold value $γ{t}_c$, which only depends on the effective temperature or mean thermal photon number of the thermal channel, but not depends on the effective temperature of the initial thermal state. This phenomenon is similar with the case of single quantum excitation of classical coherent states in thermal channel. Furthermore, we firstly demonstrate $γ{t}_c$ is the same for arbitrary pure or mixed nonclassical optical fields with zero population in vacuum state. PACS numbers: 42.50.Dv, 03.65.Yz, 05.40.Ca
description: 4 pages, 2 figures, revtex4, Welcome any comments
Possibilities to identify defective electric automobile batteries
Creators: name: Berjoza, D.
name: Pirs, V.
name: Jurgena, I.
Publisher: name: Agronomy Research
Year: 2019
Subjects: electric vehicle
battery pack
battery voltage
test
article

description: A pack of batteries is one of the most important and expensive assemblies for an electric vehicle. A pack of batteries is comprised of several batteries connected in series. The number of the batteries connected depends on the operating voltage of the vehicle’s on-board system as well as on the individual characteristics of the batteries used, e.g. the operating voltage of a single cell. One or several cells of a pack of batteries could be damaged if improperly exploiting an electric vehicle– excessively discharging the batteries or overloading the electric vehicle. If a self-converted vehicle does not use an intellectual BMS (battery management system) that can identify and register voltage drop for any individual cell in the high-load regime, e.g. when accelerating, it is difficult to identify and change the cells damaged. In case a cell does not demonstrate a complete failure, it is almost impossible to identify a defect in any regime other than the load regime. The research developed and compared three different methods for identifying defective battery cells. The methods were approbated on a converted Renault Clio. The experiment involved making voltage measurements in road tests, running the electric vehicle on a roll test bench and making voltage measurements of maximally discharged batteries in the no-load regime. A comparison of the measurement results revealed that the measurements made in the road tests were the most accurate and useful. After the experiment, the defective battery cells were replaced, thereby restoring the performance of the battery pack.
Modeling of Branched Thickening Polymers under Poiseuille Flow Gives Clues as to how to Increase a Solvent Viscosity
Creators: name: Mayoral, E.
name: Goicochea, A. Gama
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The viscosity enhancement of a solvent produced by the addition of thickening branched polymers is predicted as a function of polymer concentration, branch length and persistence length, and strength of the covalent bonding interactions. Non equilibrium, stationary state Poiseuille numerical simulations are performed using the dissipative particle dynamics model to obtain the viscosity of the fluid. It is found that the clustering of the polymers into aggregates raises the viscosity and that it is more strongly affected by the strength of the bonding interactions. General scaling relationships are found for the viscosity as a function of the variables studied, which are expected to be useful for the design and synthesis of new viscosifying polymers. It is argued that our results can be applied to aqueous thickeners, of importance for colloidal fluids such as paints and coatings, and also for nonpolar fluids such as supercritical CO2, which is a promising non hydraulic fracking fluid also useful in enhanced oil recovery.
description: 49 pages, 15 figures
Archaic Greek Earrings: An Interim Survey
Creators: name: Castor, Alexis Q.
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Archaic
subject: jewelry
subject: earrings
subject: women

description: Archäologischer Anzeiger, 1. Halbband 2008
description: Although earrings were one of the most common jewelry types in Greece, the most recent survey of this ornament is the 1903 study by Karl Hadaczek. This study focuses on earrings discovered in controlled excavations and dating to the Archaic period; such a restriction both confirms the authenticity of the earrings and also provides insight into the occasions on which jewelry was deliberately removed from circulation by its owner. A survey of the evidence related to earrings reveals how they worn, hints that men and women may have sported the accessories and provides some clues to the manufacture of jewelry. Following this overview, a typology of Archaic earring forms based on firm regional and chronological data is provided. As jewelry is a type of wealth that we can link specifically with Greek women, study of these ornaments offers unique – and under-exploited – evidence for female participation in the public sphere.
Visual Observation and Quantitative Measurement of the Microwave Absorbing Effect at X band
Creators: name: Zhao, L.
name: Chen, X.
name: Ong, C. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have setup a simple field mapping measure system to describe graphically the 2D quasi-free-space electromagnetic wave in a parallel plate waveguide at the X-band frequencies. Our apparatus illustrates a potential application in characterizing the microwave absorbing materials. The visual demonstration about the physical process and quantitative measurement of reflectivity coefficients can be achieved. This simple apparatus has have an advantage over with conventional testing methods which usually involve huge, expensive anechoic chambers and demand samples of large size.
description: 24 pages, 8 figures
Graded structure and Hopf structures in parabosonic algebra. An alternative approach to bosonisation
Creators: name: Kanakoglou, K.
name: Daskaloyannis, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 16W55 (Primary), 16W30, 16W50 (Secondary)

description: Parabosonic algebra in infinite degrees of freedom is presented as a generalization of the bosonic algebra, from the viewpoints of both physics and mathematics. The notion of super-Hopf algebra is shortly discussed and the super-Hopf algebraic structure of the parabosonic algebra is established (without appealing to its Lie superalgebraic structure). Two possible variants of the parabosonic algebra are presented and their (ordinary) Hopf algebraic structure is estabished: The first is produced by "bosonising" the original super-Hopf algebra, while the second is constructed via a slightly different path.
description: 12 pages, Talk presented at the International Conference: "New techniques in Hopf algebras and graded ring theory", Brussels, September 19-23, 2006. Submitted for publication at the proceedings
Unimodal and multimodal communication with hearing impaired students
Creators: name: Pudlas, Kenneth Arthur
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to gather data on hearing impaired students' reception of language presented through each of five communication modes: oral (speechreading), aural (audition), manual (signs), oral-aural (speechreading plus audition), and simultaneous (speechreading plus audition plus signs). The 106 subjects (53 females, 53 males) had a mean age of 17 5.4 months and mean hearing threshold level (HTL) of 97.7dB. Other personal and demographic data are reported. The procedure utilized a within-subjects design, and four lists of stimulus sentences which were constructed so as to control for vocabulary level and visemic content of lexical items, phrase and syntactic structure, and length. To ensure consistency across trials, sentence lists were video taped. Each subject received twelve sentences through each of the five modes. After each sentence, subjects were alloted 30 seconds in which to write it in the appropriate blanks in an answer booklet . One mark was awarded for each correct word in the appropria blank, for a possible maximum score of 57 for each mode. The highest scores were obtained under simultaneous (X = 33.2) and manual (X = 31.5) which were greater (p < .01) than other modes. The score for oral-aural (X = 7.3) was higher (p < .05) than oral (X = 3.8) or aural (X = 3.1). None of the other differences were significant. Separate analyses were performed to determine the effect of a number of personal and demographic variables on subjects' performance under each mode. Results of the multiple stepwise regression procedure indicated that subjects' syntactic ability accounted for a large proportion of the variance in all but the aural mode. Effects of independent variables varied between modes, emphasizing the difficulties inherent in matched sample best-method studies. Results are discussed in light of various theories of cognitive processing and selective attention. Implications and suggestions for further study are presented.
Barrier transmission for the one-dimensional nonlinear Schrödinger equation: resonances and transmission profiles
Creators: name: Rapedius, K.
name: Korsch, H. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The stationary nonlinear Schrödinger equation (or Gross-Pitaevskii equation) for one-dimensional potential scattering is studied. The nonlinear transmission function shows a distorted profile, which differs from the Lorentzian one found in the linear case. This nonlinear profile function is analyzed and related to Siegert type complex resonances. It is shown, that the characteristic nonlinear profile function can be conveniently described in terms of skeleton functions depending on a few instructive parameters. These skeleton functions also determine the decay behavior of the underlying resonance state. Furthermore we extend the Siegert method for calculating resonances, which provides a convenient recipe for calculating nonlinear resonances. Applications to a double Gaussian barrier and a square well potential illustrate our analysis.
description: 9 pages, 6 figures, 1 table
PSSOH 2019: Preliminary program and invitation letter
Creators: name: Miljković, Nadica
name: Pejović, Predrag
name: Cvetanović, Miloš
Publisher: name: Zenodo
Year: 2019
Subjects: free software
open hardware
women in electrical engineering
women in STEM
gender equality
electrical engineering
computer science
open science

description: This document contains both preliminary program and invitation letter for the PSSOH 2019 conference (in Serbian: "Primena slobodnog softvera i otvorenog hardvera"). PSSOH stands for Application of Free Software and Open Hardware.. PSSOH is organized by University of Belgrade - School of Electrical Engineering. More at: http://pssoh.etf.bg.ac.rs/.
description: Photo of the building of Technical faculties (where PSSOH 2019 will take place) presented in the document was taken by Assist. Prof. Miodrag Tasić, PhD from University of Belgrade - School of Electrical Engineering, Belgrade, Serbia.
Simulation Studies and Detector Scenarios for an ILC Polarimeter
Creators: name: Eyser, K. O.
name: Helebrant, C.
name: Kaefer, D.
name: List, J.
name: Velte, U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: High energy longitudinal electron polarimetry will be based on Compton scattering for the International Linear Collider. An unobtrusive measurement has to include a magnet chicane setup serving as a spectrometer. Current proposals make use of Cerenkov detectors for electron detection. A fast simulation has been developed to study the basic properties of scenarios for the polarimeter setup.
description: 4 pages, 3 figures, LCWS 2007 conference proceedings
Synthesis, structure and properties of layered phosphide nitrides $Ak$Th$_2$Mn$_4$P$_4$N$_2$ ($Ak$ = Rb, Cs)
Creators: name: Li, Bai-Zhuo
name: Wu, Si-Qi
name: Wang, Zhi-Cheng
name: Wang, Cao
name: Cao, Guang-Han
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the design, synthesis, structure, and properties of two complex layered phosphide nitrides, $Ak$Th$_2$Mn$_4$P$_4$N$_2$ ($Ak$ = Rb, Cs), which contain anti-fluorite-type [Mn$_2$P$_2$] bilayers separated by fluorite-type [Th2N2] layers as a result of the intergrowth between AkMn$_2$P$_2$ and ThMnPN. The new compounds are featured with an intrinsic hole doping associated with the interlayer charge transfer and a built-in chemical pressure from the [Th$_2$N$_2$] layers, both of which are reflected by the changes in the lattice and the atomic position of phosphorus. The measurements of magnetic susceptibility, electrical resistivity, and specific heat indicate existence of local moments as well as itinerant electrons in relation with d-p hybridizations. The expected dominant antiferromagnetic interactions with enhanced d-p hybridizations were demonstrated by the first-principles calculations only when additional Coulomb repulsions are included. The density of states at the Fermi level derived from the specific-heat analysis are 3.5 and 7.5 times of the calculated ones for Ak = Rb and Cs, respectively, suggesting strong electron correlations in the title compounds.
description: 12 pages, 5 figures, 3 tables; Supporting information available on request
Remote atom entanglement in a fiber-connected three-atom system
Creators: name: Yan-Qing, Guo
name: Jing, Chen
name: He-Shan, Song
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An Ising-type atom-atom interaction is obtained in a fiber-connected three-atom system. The interaction is effective when $Δ\approx γ_{0}\gg g$. The preparations of remote two-atom and three-atom entanglement governed by this interaction are discussed in specific parameters region. The overall two-atom entanglement is very small because of the existence of the third atom. However, the three-atom entanglement can reach a maximum very close to 1.
description: 7 pages, 7 figures
IMPACT OF STRATEGIC LEADERSHIP ON ADMINISTRATIVE INNOVATION IN YEMENI INSURANCE COMPANIES IN SANA'A
Creators: name: MAHMOOD A. A. AL-MAQRI
name: FADL M. AL-MAHMOODI
name: GABR. A. E. AL-SANABANI
name: SENAN G. AL-MARHADHI
name: FAHD. R. T. HASSAN
Publisher: name: Zenodo
Year: 2023
Subjects: Strategic Leadership, Administration Creativity.

description: Abstract

The summary of the study: aimed to determine the impact of strategic leadership on administrative creativity in Yemeni insurance companies in the capital Sana'a. The researchers used a descriptive-analytical method and a questionnaire as a study tool. The study population included all employees in various job titles in the insurance companies in the study area. The researchers used a comprehensive census method for all study variables, which included 276 individuals in the specified job levels. The study hypotheses were tested using various statistical methods, and the study found several results, including: The level of strategic leadership practice in Yemeni insurance companies was high in all dimensions, with strategic determination being the most practiced dimension, and organizational culture enhancement being the least practiced. The level of administrative creativity was low in all dimensions (originality, fluency, flexibility, risk-taking, and sensitivity to problems). The study showed a statistically significant effect of strategic leadership dimensions (strategic determination, human capital development, balanced regulatory control implementation, ethical practices enhancement, and essential capabilities utilization) on administrative creativity in Yemeni insurance companies. However, there was no statistically significant effect of ethical practices enhancement on administrative creativity in Yemeni insurance companies. The study recommended creating a suitable work environment and climate for implementing company plans and programs and spreading leadership concepts and culture of creativity and innovation among employees and adopting cultures and employee participation in decision-making.
Quantum Phase Transitions within a nuclear cluster model and an effective model of QCD
Creators: name: Lohr-Robles, David S.
name: Lopez-Moreno, Enrique
name: Hess, Peter O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The catastrophe theory is applied to a nuclear cluster model and an effective model for QCD at low energy. The study of quantum phase transitions in the cluster model was considered in an earlier publication, but restricted to spherical clusters and on a semi-classical level. In the present contribution, we include the case of deformed clusters and determine the spectrum numerically as a function of an interaction parameter, where signatures of a quantum phase transition can be seen. It is shown that in this more complicated case, with deformation of the clusters, the catastrophe theory can be applied with some interesting consequences. A further example of a many-body problem is considered, namely an effective model of QCD, which is able to describe the low energy hadron spectrum and, when temperature is introduced, even ratios of particle-antiparticle productions. The catastrophe theory is able to provide useful information on the phase transition from a perturbative to a non-perturbative vacuum. This contributions shows the universal usefulness of catastrophe theory, while more examples of applications to different fields are mentioned in the Introduction.
description: 25 pages, 10 figures
Gromov-Witten invariants of target curves via Symplectic Field Theory
Creators: name: Rossi, Paolo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We compute the Gromov-Witten potential at all genera of target smooth Riemann surfaces using Symplectic Field Theory techniques and establish differential equations for the full descendant potential. This amounts to impose (and possibly solve) different kinds of Schroedinger equations related to some quantization of the dispersionless KdV hierarchy. In particular we find very explicit formulas for the Gromov-Witten invariants of low degree of P1 with descendants of the Kaehler class.
description: 13 pages
Factors correlating to enhanced surface diffusion in metallic glasses
Creators: name: Annamareddy, Ajay
name: Li, Yuhui
name: Yu, Lian
name: Voyles, Paul M.
name: Morgan, Dane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The enhancement of surface diffusion (DS) over the bulk (DV) in metallic glasses (MGs) is well documented and likely to strongly influence the properties of glasses grown by vapor deposition. Here, we use classical molecular dynamics simulations to identify different factors influencing the enhancement of surface diffusion in MGs. MGs have a simple atomic structure and belong to the category of moderately fragile glasses that undergo pronounced slowdown of bulk dynamics with cooling close to the glass transition temperature (Tg). We observe that DS exhibits a much more moderate slowdown compared to DV when approaching Tg, and DS/DV at Tg varies by two orders of magnitude among the MGs investigated. We demonstrate that both the surface energy and the fraction of missing bonds for surface atoms show good correlation to DS/DV, implying that the loss of nearest neighbors at the surface directly translates into higher mobility, unlike the behavior of network- and hydrogen-bonded organic glasses. Fragility, a measure of the slowdown of bulk dynamics close to Tg, also correlates to DS/DV, with more fragile systems having larger surface enhancement of mobility. The deviations observed in the fragility and DS over DV relationship are shown to be correlated to the extent of segregation or depletion of the mobile element at the surface. Finally, we explore the relationship between the diffusion pre-exponential factor (D0) and activation energy (Q) and compare to a ln(D0)-Q correlation previously established for bulk glasses, demonstrating similar correlations from MD as in the experiments and that the surface and bulk have very similar ln(D0)-Q correlations.
description: Manuscript and Supplementary Information as a single PDF
Leto as Mother: Representations of Leto with Apollo and Artemis in Attic Vase Painting of the Fifth Century B.C.
Creators: name: Foukara, Lavinia
Publisher: name: Deutsches Archäologisches Institut
Year: 2018
Subjects: subject: Attica
subject: vase painting
subject: Leto
subject: children
subject: libation

description: Archäologischer Anzeiger, 1. Halbband 2017
description: This article examines representations of Apollo, Leto and Artemis engaged in the performance of libations in Attic vase paintings of the fifth century B.C. Previous studies have focused mainly on Apollo and Artemis, often neglecting the function that Leto serves in the iconography. The present study discusses the importance of Leto’s appearance among her children in this context and argues on the basis of literary, visual, epigraphic, and archaeological evidence that her inclusion in this particular iconographical motif promotes the concept of family and thereby reinforces the kourotrophic function that Apollo and Artemis had in Attica as deities in charge of the well-being of children.
Plasmons in the presence of Tamm-Shockley states with Rashba splitting at noble metal surfaces
Creators: name: Farid, A. M.
name: Mishchenko, E. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Au(111) or similar noble metal surfaces feature Tamm-Shockley surface states that are known to possess considerable spin-orbit splitting of the Rashba type of order $Δ=0.1$ eV. When interacting with an electromagnetic field such states are expected to have resonances when the frequency of the field is near the energy of the spin-orbit splitting $Δ$. These resonances originate in the intersubband transitions between spin-split subbands. Such resonances can be observed in the frequency dependence of the surface impedance. Plasmons in thin metal films are gapless and can be strongly affected by these spin resonances, acquiring significant modification of the spectrum when it intersects the $ω=Δ$ line. Finally, an interesting demonstration of the intersubband resonances can be obtained when metal films are coated with ionic dielectrics that have a frequency of longitudinal/transverse optical phonons above/below $Δ$. The dielectric function between the two optical phonon frequencies is negative which forbids propagation of conventional plasmon-polaritons. However, the presence of spin-orbit-split surface states allows plasmon-polaritons to exist in this otherwise forbidden range of frequencies.
description: 8 pages, 4 figuers, title slightly modified, Appendices A and B added, other minor changes. Published version