cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New detailed characterization of the residual luminescence emitted by the GAGG:Ce scintillator crystals for the HERMES Pathfinder mission
Creators: name: Della Casa, Giovanni
name: Zampa, Nicola
name: Cirrincione, Daniela
name: Monzani, Simone
name: Baruzzo, Marco
name: Campana, Riccardo
name: Cauz, Diego
name: Citossi, Marco
name: Crupi, Riccardo
name: Dilillo, Giuseppe
name: Pauletta, Giovanni
name: Fiore, Fabrizio
name: Vacchi, Andrea
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The HERMES (High Energy Rapid Modular Ensemble of Satellites) Pathfinder mission aims to develop a constellation of nanosatellites to study astronomical transient sources, such as gamma-ray bursts, in the X and soft $γ$ energy range, exploiting a novel inorganic scintillator. This study presents the results obtained describing, with an empirical model, the unusually intense and long-lasting residual emission of the GAGG:Ce scintillating crystal after irradiating it with high energy protons (70 MeV) and ultraviolet light ($\sim$ 300 nm). From the model so derived, the consequences of this residual luminescence for the detector performance in operational conditions has been analyzed. It was demonstrated that the current generated by the residual emission peaks at 1-2 pA, thus ascertaining the complete compatibility of this detector with the HERMES Pathfinder nanosatellites.
Application Design Space Exploration (SPACE4AI-D)
Creators: name: Hamta Sedghani
name: Filippini, Federica
name: Ardagna, Danilo
Publisher: name: Zenodo
Year: 2021

description: The repository includes the source code and the datasets of SPACE4AI-D which is a design time tool of the AI-SPRINT. The results are included in the AI-SPRINT project deliverable "D2.1 - First release and evaluation of the AI-SPRINT design tools".
Strong In-plane Anisotropy in the Electronic Properties of Doped Transition Metal Dichalcogenides exhibited in W1-xNbxS2
Creators: name: Loh, Siow Mean
name: Xia, Xue
name: Wilson, Neil R.
name: Hine, Nicholas D. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, we study the electronic properties of monolayer transition metal dichalcogenide materials subjected to aliovalent doping, using Nb-doped WS2 as an exemplar. Scanning transmission electron microscopy imaging of the as-grown samples reveals an anisotropic Nb dopant distribution, prompting our investigation of anisotropy in electronic properties. Through electronic structure calculations on supercells representative of observed structures, we confirm that local Nb-atom distributions are consistent with energetic considerations, although kinetic processes occurring during sample growth must be invoked to explain the overall symmetry-breaking. We perform effective bandstructure and conductivity calculations on realistic models of the material that demonstrate that a high level of anisotropy can be expected in electronic properties including conductivity and mobility.
description: Updated version incorporating referee suggestions
The Interiors of Giant Planets: Models and Outstanding Questions
Creators: name: Guillot, Tristan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We know that giant planets played a crucial role in the making of our Solar System. The discovery of giant planets orbiting other stars is a formidable opportunity to learn more about these objects, what is their composition, how various processes influence their structure and evolution, and most importantly how they form. Jupiter, Saturn, Uranus and Neptune can be studied in detail, mostly from close spacecraft flybys. We can infer that they are all enriched in heavy elements compared to the Sun, with the relative global enrichments increasing with distance to the Sun. We can also infer that they possess dense cores of varied masses. The intercomparison of presently caracterised extrasolar giant planets show that they are also mainly made of hydrogen and helium, but that they either have significantly different amounts of heavy elements, or have had different orbital evolutions, or both. Hence, many questions remain and are to be answered for significant progresses on the origins of planets.
description: 43 pages, 11 figures, 3 tables. To appear in Annual Review of Earth and Planetary Sciences, vol 33, (2005)
A unified uncertainty-aware exploration: Combining epistemic and aleatory uncertainty
Creators: name: Malekzadeh, Parvin
name: Hou, Ming
name: Plataniotis, Konstantinos N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Exploration is a significant challenge in practical reinforcement learning (RL), and uncertainty-aware exploration that incorporates the quantification of epistemic and aleatory uncertainty has been recognized as an effective exploration strategy. However, capturing the combined effect of aleatory and epistemic uncertainty for decision-making is difficult. Existing works estimate aleatory and epistemic uncertainty separately and consider the composite uncertainty as an additive combination of the two. Nevertheless, the additive formulation leads to excessive risk-taking behavior, causing instability. In this paper, we propose an algorithm that clarifies the theoretical connection between aleatory and epistemic uncertainty, unifies aleatory and epistemic uncertainty estimation, and quantifies the combined effect of both uncertainties for a risk-sensitive exploration. Our method builds on a novel extension of distributional RL that estimates a parameterized return distribution whose parameters are random variables encoding epistemic uncertainty. Experimental results on tasks with exploration and risk challenges show that our method outperforms alternative approaches.
description: Accepted by ICASSP2023
Self-esteem and achievement : ethnicity, gender, parental love and coping styles
Creators: name: Buller-Taylor, Terri
Publisher: name: University of British Columbia
Year: 2009

description: The strength of the relationship between various measures of self, such as self-esteem, self-concept, self-acceptance, and achievement has been studied extensively with varying results (see Hansford & Hattie, 1982). This variation may be attributable to the use of different self and achievement measures, ranges in the age of those studied, and not controlling for socioeconomic status, ethnicity/race, gender, or school effects. The main goal of my thesis was to estimate the strength of the relationship between self-esteem, and achievement when gender, ethnicity/race, socioeconomic status, aspects of the parent-child relationship and school contextual effects were controlled. Analyses were conducted on two large data sets. The first was taken from the National Educational Longitudinal Study (NELS) - 1988 and consists of 21,039 grade 8 students sampled from the United States. The second data set was taken from the School-Based Prevention Project (SBPP) - 1995 and consists of 6,795 grade 8 through 12 students from 20 schools in British Columbia, Canada. For both data sets, 7 of 10 items from the Rosenberg Self-Esteem Scale (1965) were used to measure self-esteem. Analyses of the NELS data set yielded three notable findings: (1) the strength of the self-esteem/ achievement relationship is not equivalent across gender-ethnic/racial groups, (2) the self-esteem/ achievement relationship varies when grades versus tests scores are used as achievement measures, and (3) the variability in self-esteem is largely within-schools. Variables controlled in these analyses were gender, ethnicity/race and socioeconomic status. Analyses of the SBPP data yielded four notable findings: (1) the strength of the self-esteem/ achievement relationship varies across a new measure of coping styles, (2) relational factors reduce the strength of the self-esteem/achievement relationship, (3) relational factors explain much more of the variance in self-esteem than does achievement, and (4) almost all the variance in self-esteem is within schools. Variables controlled in these analyses included gender, grade-level, socioeconomic status, perceptions of Mother's and Father's love, and coping styles. The theoretical implications of these results are discussed in terms of attachment theory (Ainsworth, 1969), coping styles (Horney, 1950), and the need to belong (Baumeister & Leary, 1995).
Separation of variables in the WZW models
Creators: name: Lunin, Oleg
name: Tian, Jia
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider dynamics of scalar and vector fields on gravitational backgrounds of the Wess-Zumino-Witten models. For SO(4) and its cosets, we demonstrate full separation of variables for all fields and find a close analogy with a similar separation of vector equations in the backgrounds of the Myers--Perry black holes. For SO(5) and higher groups separation of variables is found only in some subsectors.
description: 62 pages
Over-the-Air Federated Learning from Heterogeneous Data
Creators: name: Sery, Tomer
name: Shlezinger, Nir
name: Cohen, Kobi
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Federated learning (FL) is a framework for distributed learning of centralized models. In FL, a set of edge devices train a model using their local data, while repeatedly exchanging their trained updates with a central server. This procedure allows tuning a centralized model in a distributed fashion without having the users share their possibly private data. In this paper, we focus on over-the-air (OTA) FL, which has been suggested recently to reduce the communication overhead of FL due to the repeated transmissions of the model updates by a large number of users over the wireless channel. In OTA FL, all users simultaneously transmit their updates as analog signals over a multiple access channel, and the server receives a superposition of the analog transmitted signals. However, this approach results in the channel noise directly affecting the optimization procedure, which may degrade the accuracy of the trained model. We develop a Convergent OTA FL (COTAF) algorithm which enhances the common local stochastic gradient descent (SGD) FL algorithm, introducing precoding at the users and scaling at the server, which gradually mitigates the effect of the noise. We analyze the convergence of COTAF to the loss minimizing model and quantify the effect of a statistically heterogeneous setup, i.e. when the training data of each user obeys a different distribution. Our analysis reveals the ability of COTAF to achieve a convergence rate similar to that achievable over error-free channels. Our simulations demonstrate the improved convergence of COTAF over vanilla OTA local SGD for training using non-synthetic datasets. Furthermore, we numerically show that the precoding induced by COTAF notably improves the convergence rate and the accuracy of models trained via OTA FL.
description: 15 pages, 8 figures. Part of the results were accepted to be presented in the 2020 IEEE Global Communications Conference (GLOBECOM)
Phytochemical analysis of leaves and stems of Physalis alkekengi L. (Solanaceae) from Bulgaria
Creators: name: Popova, Venelina
name: Ivanova, Tanya
name: Stoyanova, Magdalena
name: Mazova, Nadezhda
name: Dimitrova-Dyulgerova, Ivanka
name: Stoyanova, Albena
Publisher: name: Zenodo
Year: 2021
Subjects: Physalis alkekengi L., protein, amino acids, minerals, GC-MS volatiles

description: Physalis alkekengi L. (Solanaceae) is encountered in different regions of Bulgaria as a wild growing or ornamental plant. All aerial parts of the plant have been used in folk medicine for centuries due to the presence of various bioactive metabolites; the plant is included within the scope of the Medicinal Plants Act of Bulgaria. The objective of this work was to characterize the phytochemical composition of the leaves and stems of two genotypes of P. alkekengi collected from natural habitats in Southern and Northern Bulgaria (PA-SB and PA-NB), with the view of revealing their use potential in feed, cosmetics and other areas. The results from the study revealed significant differences in the levels of the phytochemical components (ash, cellulose, protein, amino acids, macro and micro minerals), both on a plant part and genotype basis. The leaves of the two genotypes were further processed by extraction with n-hexane, for the identification of leaf volatiles. The GC-MS analysis identified 28 components (97.99%) in the leaf extract of PA-SB, and 32 components (97.50%) in that of PA-NB. The volatile profile of PA-SB leaves was dominated by diterpenes (49.96%) and oxygenated sesquiterpenes (35.61%), while that of PA-NB – by oxygenated aliphatics (40.01%) and diterpenes (35.19%). To the best of our knowledge, the study provides the first data about the content of macro and micro nutrients and volatiles in the leaves and stems of P. alkekengi from Bulgaria, in a direct comparison of genotypes from two distinct populations, which could be of further practical interest.
Thermo-optical bistability in silicon micro-cantilevers
Creators: name: Pottier, Basile
name: Bellon, Ludovic
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report a thermo-optical bistability observed in silicon micro-cantilevers irradiated by a laser beam with mW powers: reflectivity, transmissivity, absorption, and temperature can change by a factor of two between two stable states for the same input power. The temperature dependency of the absorption at the origin of the bistability results from interferences between internal reflections in the cantilever thickness, acting as a lossy Fabry-Pérot cavity. A theoretical model describing the thermo-optical coupling is presented. The experimental results obtained for silicon cantilevers irradiated in vacuum at two different visible wavelengths are in quantitative agreement with the predictions of this model.
description: Submitted to SciPost Physics
Pulsar Wind Nebulae in the Chandra Era
Creators: name: Kargaltsev, O.
name: Pavlov, G. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Pulsar winds shocked in the ambient medium produce spectacular nebulae observable from the radio through gamma-rays. The shape and the spectrum of a pulsar wind nebula (PWN) depend on the angular distribution, magnetization and energy spectrum of the wind streaming from the pulsar magnetosphere, as well as on the pulsar velocity and the properties of the ambient medium. The advent of Chandra, with its unprecedented angular resolution and high sensitivity, has allowed us not only to detect many new PWNe, but also study their spatial and spectral structure and dynamics, which has significantly advanced our understanding of these objects. Here we overview recent observational results on PWNe, with emphasis on Chandra observations.
description: 15 pages, 5 tables, 10 figures. To appear in the proceedings of "40 Years of Pulsars: Millisecond Pulsars, Magnetars, and More", August 12-17, 2007, McGill University, Montreal, Canada. Corrected typos in Table 1
Digital Prototype Filter Alternatives for Processing Frequency-Stacked Mobile Subbands Deploying a Single ADC for Beamforming Satellites
Creators: name: Coskun, Adem
name: Cetinsel, Sevket
name: Kale, Izzet
name: Hughes, Robert
name: Angeletti, Piero
name: Ernst, Christoph
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This article presents a two-stage approach for the processing of frequency-stacked mobile subbands. The frequency stacking is performed in the analog domain to enable the use of a wideband analog-to-digital converter (ADC), instead of employing multiple narrowband ADCs, to support multiple antenna elements for digital satellite beamforming. This analog front end provides a common broadband digital interface to the on-board processor and can be configured to support multiple satellite missions, reducing the cost of commissioning a digital processor for individual satellite missions. This article proposes a framework on the specification of digital prototype filter for the analysis of frequency-stacked mobile subbands. The computational complexity of the analysis operation, with two digital filter alternatives, are evaluated. A series of results, taken from our European Space Agency sponsored project, are presented here to demonstrate the applicability of the proposed two stage approach, reporting on the savings in power consumption when an Nth-band all-pass-based recursive filter having an infinite impulse response is used as the digital prototype filter.
Fictive Impurity Approach to Dynamical Mean Field Theory: a Strong-Coupling Investigation
Creators: name: Fuhrmann, Andreas
name: Okamoto, Satoshi
name: Monien, Hartmut
name: Millis, Andrew J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum Monte Carlo and semiclassical methods are used to solve two and four site cluster dynamical mean field approximations to the square lattice Hubbard model at half filling and strong coupling. The energy, spin correlation function, phase boundary and electron spectral function are computed and compared to available exact results. The comparision permits a quantitative assessment of the ability of the different methods to capture the effects of intersite spin correlations. Two real space methods and one momentum space representation are investigated. One of the two real space methods is found to be significantly worse: in it, convergence to the correct results is found to be slow and, for the spectral function, nonuniform in frequency, with unphysical midgap states appearing. Analytical arguments are presented showing that the discrepancy arises because the method does not respect the pole structure of the self energy of the insulator. Of the other two methods, the momentum space representation is found to provide the better approximation to the intersite terms in the energy but neither approximation is particularly acccurate and the convergence of the momentum space method is not uniform. A few remarks on numerical methods are made.
description: Errors in previous versions corrected; CDMFT results added
Kinematic corrections and reconstruction methods for neutral Higgs boson decay to $b\bar{b}$ in 2HDM type-I at future lepton colliders
Creators: name: Hashemi, Majid
name: Ebrahimi, Elnaz
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, an approach for neutral Higgs bosons search is described based on 2HDM type-I at electron-positron linear colliders operating at $ \sqrt{s}=1$ TeV. The beam is assumed to be unpolarized and fast detector simulation is included. The signal process produces a fully hadronic final state through $ e^{+}e^{-}\rightarrow AH\rightarrow b\bar{b}b\bar{b} $ where both CP-even and CP-odd Higgs bosons ($H$ and $A$) are assumed to decay to a pair of $b$-jets. Several benchmark scenarios are introduced as the baseline for the analysis taking $ m_{H/A}$ in the range 150--300 GeV. In order to avoid Higgs boson conversion $A \to ZH$, Higgs boson masses are chosen with $m_A-m_H < m_Z$. It is shown that with a proper kinematic correction applied on final state $b$-jet four momenta, true combinations of $b$-jets can be found for simultaneous reconstruction of both Higgs bosons through $b\bar{b}$ invariant mass calculation. Results show that observable signals can be achieved with statistical significance exceeding $5σ$ well before the target integrated luminosity of 8 $ab^{-1}$.
description: 13 pages
Electric Chern-Simons term, enlarged exotic Galilei symmetry and noncommutative plane
Creators: name: del Olmo, Mariano A.
name: Plyushchay, Mikhail S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The extended exotic planar model for a charged particle is constructed. It includes a Chern-Simons-like term for a dynamical electric field, but produces usual equations of motion for the particle in background constant uniform electric and magnetic fields. The electric Chern-Simons term is responsible for the non-commutativity of the boost generators in the ten-dimensional enlarged exotic Galilei symmetry algebra of the extended system. The model admits two reduction schemes by the integrals of motion, one of which reproduces the usual formulation for the charged particle in external constant electric and magnetic fields with associated field-deformed Galilei symmetry, whose commuting boost generators are identified with the nonlocal in time Noether charges reduced on-shell. Another reduction scheme, in which electric field transmutes into the commuting space translation generators, extracts from the model a free particle on the noncommutative plane described by the two-fold centrally extended Galilei group of the non-relativistic anyons.
description: 16 pages, title corrected, minor stylistical corrections, references added
Optimizing Dataflow Systems for Scalable Interactive Visualization
Creators: name: Yang, Junran
name: Joo, Hyekang Kevin
name: Yerramreddy, Sai
name: Moritz, Dominik
name: Battle, Leilani
Publisher: name: arXiv
Year: 2024
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Supporting the interactive exploration of large datasets is a popular and challenging use case for data management systems. Traditionally, the interface and the back-end system are built and optimized separately, and interface design and system optimization require different skill sets that are difficult for one person to master. To enable analysts to focus on visualization design, we contribute VegaPlus, a system that automatically optimizes interactive dashboards to support large datasets. To achieve this, VegaPlus leverages two core ideas. First, we introduce an optimizer that can reason about execution plans in Vega, a back-end DBMS, or a mix of both environments. The optimizer also considers how user interactions may alter execution plan performance, and can partially or fully rewrite the plans when needed. Through a series of benchmark experiments on seven different dashboard designs, our results show that VegaPlus provides superior performance and versatility compared to standard dashboard optimization techniques.
Nucleation and Collapse of the Superconducting Phase in Type-I Superconducting Films
Creators: name: Gourdon, Catherine
name: Jeudy, Vincent
name: Cebers, Andrejs
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The phase transition between the intermediate and normal states in type-I superconducting films is investigated using magneto-optical imaging. Magnetic hysteresis with different transition fields for collapse and nucleation of superconducting domains is found. This is accompanied by topological hysteresis characterized by the collapse of circular domains and the appearance of lamellar domains. Magnetic hysteresis is shown to arise from supercooled and superheated states. Domain-shape instability resulting from long-range magnetic interaction accounts well for topological hysteresis. Connection with similar effects in systems with long-range magnetic interactions is emphasized.
The Ghost Dance in Popular Culture
Creators: name: Goldstein, Jacob
Publisher: name: University of Rochester
Year: 2024
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 430321
subject: North American history
classificationCode: 470307
subject: English language

description: Paper submitted to fulfill HIS 252 course, Cultural History of the United States, 1876-Present taught by Professor Joan Rubin, Spring 2010Introduction: "On June 2, 1891, Beadle’s Half Dime Library, a weekly publication of the dime novel company Beadle & Adams, published the first in a series of four “Silverblade” novels by Joseph Badger.[1] Badger was a regular writer for the company, and published over 200 dime novels with them over the course of his career. In many ways, his “Silverblade” novels were typical of other dime novels published by the firm including Deadwood Dick, Buffalo Bill, and Pawnee Bill. The Silverblade series included recurring plot devices with plenty of action and suspense and were very popular when first published.[2] What makes these four novels exceptional is Badger’s fictionalization of recent history. In the Silverblade stories, the plot revolves around a half-blood Shoshone named Silverblade and his experience in the Ghost Dance. Throughout the previous year, news coverage of the Ghost Dance and the associated violence in South Dakota was extensive, and Badger, writing only months later, most likely drew upon this coverage in his depictions of historical events and figures. While the stories are fictional, they fairly accurately depict the historical events of the Ghost Dance as they were understood by the American public at the time. Therefore, although these stories are historically erroneous, they do provide an accurate picture of how the Ghost Dance was popularly understood and described by newspapers in 1890."This document was adapted from a webpage hosted on the Rare Books, Special Collections, and Manuscripts website, before being converted into a static document and uploaded to URRR on 2024-10-09.
Optical soliton formation controlled by angle twisting in photonic moiré lattices
Creators: name: Fu, Qidong
name: Wang, Peng
name: Huang, Changming
name: Kartashov, Yaroslav V.
name: Torner, Lluis
name: Konotop, Vladimir V.
name: Ye, Fangwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Exploration of the impact of synthetic material landscapes featuring tunable geometrical properties on physical processes is a research direction that is currently of great interest because of the outstanding phenomena that are continually being uncovered. Twistronics and the properties of wave excitations in moiré lattices are salient examples. Moiré patterns bridge the gap between aperiodic structures and perfect crystals, thus opening the door to the exploration of effects accompanying the transition from commensurate to incommensurate phases. Moiré patterns have revealed profound effects in graphene-based systems1,2,3,4,5, they are used to manipulate ultracold atoms6,7 and to create gauge potentials8, and are observed in colloidal clusters9. Recently, it was shown that photonic moiré lattices enable observation of the two-dimensional localization-to-delocalization transition of light in purely linear systems10,11. Here, we employ moiré lattices optically induced in photorefractive nonlinear media12,13,14 to elucidate the formation of optical solitons under different geometrical conditions controlled by the twisting angle between the constitutive sublattices. We observe the formation of solitons in lattices that smoothly transition from fully periodic geometries to aperiodic ones, with threshold properties that are a pristine direct manifestation of flat-band physics11.
description: 15 pages, 5 figures
Classification of irreducible weight modules over $W$-algebra W(2,2)
Creators: name: Liu, Dong
name: Gao, Shoulan
name: Zhu, Linsheng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B10, 17B65, 17B68

description: We show that the support of an irreducible weight module over the $W$-algebra $W(2, 2)$, which has an infinite dimensional weight space, coincides with the weight lattice and that all nontrivial weight spaces of such a module are infinite dimensional. As a corollary, we obtain that every irreducible weight module over the the $W$-algebra $W(2, 2)$, having a nontrivial finite dimensional weight space, is a Harish-Chandra module (and hence is either an irreducible highest or lowest weight module or an irreducible module of the intermediate series).
description: 10 pages
Relaxation in a glassy binary mixture: Comparison of the mode-coupling theory to a Brownian dynamics simulation
Creators: name: Flenner, Elijah
name: Szamel, Grzegorz
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We solved the mode-coupling equations for the Kob-Andersen binary mixture using the structure factors calculated from Brownian dynamics simulations of the same system. We found, as was previously observed, that the mode-coupling temperature, Tc, inferred from simulations is about two times greater than that predicted by the theory. However, we find that many time dependent quantities agree reasonably well with the predictions of the mode-coupling theory if they are compared at the same reduced temperature epsilon = (T-Tc)/Tc, and if epsilon is not too small. Specifically, the simulation results for the incoherent intermediate scattering function, the mean square displacement, the relaxation time and the self-diffusion coefficient agree reasonably well with the predictions of the mode-coupling theory. We find that there are substantial differences for the non-Gaussian parameter. At small reduced temperatures the probabilities of the logarithm of single particle displacements demonstrate that there is hopping-like motion present in the simulations, and this motion is not predicted by the mode-coupling theory. The wave vector dependent relaxation time is shown to be qualitatively different than the predictions of the mode-coupling theory for temperatures where hopping-like motion is present.
description: To be published in Physical Review E
Quantum process tomography of a Mølmer-Sørensen gate via a global beam
Creators: name: Tinkey, Holly N
name: Meier, Adam M
name: Clark, Craig R
name: Seck, Christopher M
name: Brown, Kenton R
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a framework for quantum process tomography of two-ion interactions that leverages modulations of the trapping potential and composite pulses from a global laser beam to achieve individual-ion addressing. Tomographic analysis of identity and delay processes reveals dominant error contributions from laser decoherence and slow qubit frequency drift during the tomography experiment. We use this framework on two co-trapped $^{40}$Ca$^+$ ions to analyze both an optimized and an overpowered Mølmer-Sørensen gate and to compare the results of this analysis to a less informative Bell-state tomography measurement and to predictions based on a simplified noise model. These results show that the technique is effective for the characterization of two-ion quantum processes and for the extraction of meaningful information about the errors present in the system. The experimental convenience of this method will allow for more widespread use of process tomography for characterizing entangling gates in trapped-ion systems.
description: 15 pages, 6 figures
The strain gap in a system of weakly and strongly interacting two-level systems
Creators: name: Churkin, A.
name: Gabdank, I.
name: Burin, A.
name: Schechter, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Many disordered lattices exhibit remarkable universality in their low temperature properties, similar to that found in amorphous solids. Recently a two-TLS (two-level system) model was derived based on the microscopic characteristics of disordered lattices. Within the two-TLS model the quantitative universality of phonon attenuation, and the energy scale of $1-3$ K below which universality is observed, are derived as a consequence of the existence of two types of TLSs, differing by their interaction with the phonon field. In this paper we calculate analytically and numerically the densities of states (DOS) of the weakly and strongly interacting TLSs. We find that the DOS of the former can be well described by a Gaussian function, whereas the DOS of the latter have a power law correlation gap at low energies, with an intriguing dependence of the power on the short distance cutoff of the interaction. Both behaviors are markedly different from the logarithmic gap exhibited by a single species of interacting TLSs. Our results support the notion that it is the weakly interacting $τ$-TLSs that dictate the standard low temperature glassy physics. Yet, the power-law DOS we find for the $S$-TLSs enables the prediction of a number of deviations from the universal glassy behavior that can be tested experimentally. Our results carry through to the analogous system of electronic and nuclear spins, implying that electronic spin flip rate is significantly reduced at temperatures smaller than the magnitude of the hyperfine interaction.
description: Version submitted to EPJ ST
Orbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures
Creators: name: Knecht, C.
name: Blümer, N.
name: van Dongen, P. G. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The anisotropic degenerate two-orbital Hubbard model is studied within dynamical mean-field theory at low temperatures. High-precision calculations on the basis of a refined quantum Monte Carlo (QMC) method reveal that two distinct orbital-selective Mott transitions occur for a bandwidth ratio of 2 even in the absence of spin-flip contributions to the Hund exchange. The second transition -- not seen in earlier studies using QMC, iterative perturbation theory, and exact diagonalization -- is clearly exposed in a low-frequency analysis of the self-energy and in local spectra.
description: 4 pages, 5 figures
Glossa Psalterii
Creators: name: Johannes
Publisher: name: [s.n.]
Year: 1438

description: Anonymus
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch
description: Aus der Bibliothek des Domstifts zu Basel. Dorther die alte Signatur "C iv"; vgl. die Pergamentetikette auf dem vorderen Deckel "C iiii".
description: Black, Jonathan. - Psalm Uses in Carolingian Prayerbooks: Alcuin and the Preface to De psalmorum usu. - In: Mediaeval Studies 64 (2002) S. 1-60, bes. S. 37
description: Verzeichnung=Description=Inventaire Jan. 2010 Titel, Jahr und Signatur nach: Schmidt, unpublizierte Beschreibung
description: Verzeichnung=Description=Inventaire Juni 2012 HAN-Katalogisierungsregeln Minimalaufnahme nach: Schmidt (1919/20) und Scarpatetti (1977)
description: Verzeichnung=Description=Inventaire April 2024 HAN-Katalogisierungsregeln Ergänzung der Minimalaufnahme nach Autopsie, Schmidt (1919/20) und Scarpatetti (1977)
description: Digitalisierung=Digitization=Numérisation April 2024 TIFF
description: Erschliessungsniveau Minimalniveau
Superconducting Niobium Calorimeter for Studies of Adsorbed Helium Monolayers
Creators: name: Usami, Jun
name: Tokeshi, Koki
name: Matsui, Tomohiro
name: Fukuyama, Hiroshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We developed a calorimeter with a vacuum container made of superconducting niobium (Nb) to study monolayers of helium adsorbed on graphite which are prototypical two-dimensional quantum matters below 1 K. Nb was chosen because of its small specific heat in the superconducting state. It is crucially important to reduce the addendum heat capacity ($C_{\rm{ad}}$) when the specific surface area of substrate is small. Here we show details of design, construction and results of $C_{\rm{ad}}$ measurements of the Nb calorimeter down to 40 mK. The measured $C_{\rm{ad}}$ was sufficiently small so that we can use it for heat capacity measurements on helium monolayers in a wide temperature range below 1 K. We found a relatively large excess heat capacity in $C_{\rm{ad}}$, which was successfully attributed to atomic tunneling of hydrogen (H) and deuterium (D) between trap centers near oxygen or nitrogen impurities in Nb. The tunnel frequencies of H and D deduced by fitting the data to the tunneling model are consistent with the previous experiments on Nb doped with H or D.
Electronic transport properties of intermediately coupled superconductors: PdTe2 and Cu0.04PdTe2
Creators: name: Hooda, M. K.
name: Yadav, C. S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have investigated the electrical resistivity, Seebeck coefficient and thermal conductivity of PdTe2 and 4% Cu intercalated PdTe2 compounds. Electrical resistivity for the compounds shows Bloch-Gruneisen type linear temperature (T) dependence for 100 K < T < 480 K, and Fermi liquid behavior (~ T^2) below 50 K. Seebeck coefficient data exhibit strong competition between Normal (N) and Umklapp (U) scattering processes at low T. Though our results indicate the transfer of charge carriers to PdTe2 upon Cu intercalation, it is difficult to discern any change in the Fermi surface of the compound by Nordheim-Gorter plots. The estimated Fermi energies of the compounds are quite comparable to good metals Cu, Ag and Au. The low T, thermal conductivity (k) of the compounds is strongly dominated by the electronic contribution, and exhibits a rare linear T dependence below 10 K. However, high T, k(T) shows usual 1/T dependence, dominated by U scattering process. The electron phonon coupling parameters, estimated from the low T, specific heat data and first principle electronic structure calculations suggest that PdTe2 and Cu0.04PdTe2 are intermediately coupled superconductors.
description: 18 pages, 6 figures
Likelihood scan of the Super-Kamiokande I time series data
Creators: name: Ranucci, Gioacchino
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work a detailed spectral analysis of the time series of the 8B solar neutrino flux published by the Super-Kamiokande Collaboration is presented, performed through a likelihood scan approach. Preliminarily a careful review of the analysis methodology is given, showing that the traditional periodicity search via the Lomb-Scargle periodogram is a special case of a more general likelihood based method. Since the data are published together with the relevant asymmetric errors, it is then shown how the likelihood analysis can be performed either with or without a prior error averaging. A key point of this work is the detailed illustration of the mathematical model describing the statistical properties of the estimated spectra obtained in the various cases, which is also validated through extensive Monte Carlo computations; the model includes a calculation for the prediction of the possible alias effects. In the successive investigation of the data, such a model is used to derive objective, mathematical predictions which are quantitatively compared with the features observed in the experimental spectra. This article clearly demonstrates that the handling of the errors is the origin of the discrepancy between published null observations and claimed significant periodicity in the same SK-I data sample. Moreover, the comprehensive likelihood analysis with asymmetric errors developed in this work provides results which cannot exclude the null hypothesis of constant rate, even though some indications stemming from the model at odd with such conclusion point towards the desirability of additional investigations with alternative methods to shed further light on the characteristics of the data.
description: 49 pages, 38 figures. Calculation of the asymmetric likelihood revised. Accepted fo publication on Physical Review D
Phosphorous Diffusion Gettering of Trapping Centers in Upgraded Metallurgical-Grade Solar Silicon
Creators: name: Catalán-Gómez, Sergio
name: Dasilva-Villanueva, Nerea
name: Marrón, David Fuertes
name: del Cañizo, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Experimental evidence indicating the beneficial impact of a phosphorous diffusion gettering (PDG) in the reduction of trapping centers is shown, as observed by means of inductively coupled photoconductance (PC) decay and lifetime measurements carried out on upgraded metallurgical-grade silicon (UMG-Si) wafers. The presence of trapping species dominating the long time range of the PC decay of UMG material (slow traps), which is effectively removed after a PDG conducted at 780 Celsius, is detected. Notwithstanding, a second trapping mechanism, characterized by a shorter time constant, still governs the response at very low injection levels after the gettering. Furthermore, the beneficial effect of the PDG is studied as a function of processing time, showing minority carrier bulk lifetime improvements up to 18-fold, up to the range of 70 us. Thereby, the way for developing gettering strategies capable of successfully removing trap centers and improving the bulk lifetime of unconventional Si material is paved.
description: 12 pages, 3 figures
Piatti, J
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1823

description: Ort: Neapel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
The influence of gas on the structure of merger remnants
Creators: name: Naab, Thorsten
name: Jesseit, Roland
name: Burkert, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a large set of merger simulations of early-type disc galaxies with mass ratios of 1:1 and 3:1 and 10% of the total disc mass in gas. In contrast to the collisionless case equal-mass mergers with gas do not result in very boxy remnants which is caused by the suppression of box orbits and the change of the projected shape of minor-axis tube orbits in the more axisymmetric remnants. The isophotal shape of 3:1 remnants and the global kinematic properties of 1:1 and 3:1 remnants are only weakly affected by the presence of gas. 1:1 remnants are slowly rotating whereas 3:1 remnants are fast rotating and discy. The shape of the stellar LOSVD is strongly influenced by gas. The LOSVDs of collisionless remnants have broad leading wings while their gaseous counterparts show steep leading wings, more consistent with observations of elliptical galaxies. We show that this change is also caused by the suppressed populating of box orbits and it is amplified by the formation of extended gas discs in the merger remnants. If elliptical galaxies have formed from mergers our results indicate that massive, slowly rotating boxy elliptical galaxies can not have formed from dissipative mergers of discs. Pure stellar (dry) mergers are the more likely candidates. On the other hand lower mass, fast rotating and discy ellipticals can have formed from dissipative (wet) mergers of early-type discs. So far, only unequal-mass disc mergers with gas can successfully explain their observed substructure. This is consistent with the revised morphological classification scheme of increasing importance of gas dissipation when moving from boxy ellipticals to discy ellipticals and then to spiral galaxies, proposed by Kormendy & Bender (abbreviated).
description: accepted for publication by MNRAS
p-DG cyclotomic nilHecke algebras
Creators: name: Khovanov, Mikhail
name: Qi, You
name: Sussan, Joshua
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: K-Theory and Homology (math.KT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 81R50, 16E20, 16E35

description: We categorify a tensor product of two Weyl modules for quantum sl(2) at a prime root of unity.
description: 72 pages, multiple diagrammatic computations, best viewed in color. v2 contains corrections from referee reports. Accepted by the Memoirs of the AMS. Comments welcome
The use of absorbing boundaries in the analysis of bankruptcy
Creators: name: Hildebrand, Paul
Publisher: name: University of British Columbia
Year: 2009

description: An explicit solution is given for the value of a risk neutral firm with stochastic revenue facing the possibility of bankruptcy. The analysis is conducted in continuous time. Uncertainty is modeled using an Ito process and bankruptcy is modeled as an absorbing boundary. The analysis yields an ordinary differential equation with a closed form solution. The value function is used to calculate the firm's demand for high interest rate loans, showing a positive demand at interest rates which appear intuitively to be excessive. A value function is also derived for a risk neutral lender advancing funds to the firm. The borrowing and lending value functions are then used to examine various aspects of lender-borrower transactions under different bargaining structures. In a competitive lending market, the model shows that credit rationing occurs inevitably. In a monopoly lending market, the lender sets interest rates and maximum loan levels which reduce the borrower to zero profit. When a second borrower is introduced, the lender must allocate limited funds between two borrowers. A lender is shown to squeeze the smaller "riskier" borrower out of the market when the lender's overall credit constraint is tight. Under each bargaining structure, the model is also used to examine changes in the respective "salvage" recoveries of the lender and borrower on bankruptcy. Accepted:
From God’s House to the State House: the importance of faith to African American women who run for elected office
Creators: name: DesVignes, Crystal
Publisher: name: No Publisher Supplied
Year: 2021

description: A democracy is legitimized by the full participation of all its citizens. However, when discussing America’s political leadership, we could use more women in the forefront. Many studies have looked at why women run for office and the motivations behind their run. Scholars look at many different types of motivating factors. In recent years there exists a shift in the literature from treating women like men, to determining that their motivation and contributing factors look different from their male counterparts. I argue in this thesis that for African–American Women, a key motivation for their run for elected office is the influence they receive from their faith in God and the Black church.