cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Policy analysis of foreign investment companies limited by shares
Creators: name: Lin, Hua-Wei
Publisher: name: University of British Columbia
Year: 2009

description: China permits foreign investors to establish foreign investment companies limited by shares (FICLBS) together with Chinese domestic investors after 1995. FICLBS are a new form of foreign investment in addition to Sino-foreign Equity Joint Ventures, Sino-foreign Contractual Joint Ventures and Wholly Foreign Owned Enterprises. In the meantime, FICLBS have close relations with and are strictly governed by PRC Company Law. The double nature of FICLBS accounts for many characteristics of FICLBS. As a form of foreign investment, FICLBS are based on the foreign investment regime. FICLBS are governed by the legal provisions relating to foreign investment regime. At the same time, various State and Party policies give various characteristics to FICLBS and make them different from other foreign investment enterprises. As a form of modern company, FICLBS are greatly influenced by both civil law and common law as a result of the policy of joining the world economy. This thesis focuses on the common law influences. The influences of common law on FICLBS are manifest in various respects. On the other hand, various Chinese characteristics are intentionally remained. These Chinese characteristics can be found in many important phases and aspects of FICLBS such as corporate capacity, corporate governance, shares and dividends. The contradicting characteristics of FICLBS are a product of the contradicting State and Party policies underlying them. On one hand, China adopts the opening-up policy and has been making constant efforts to join the world economy. On the other hand, China has always been trying to maintain the so-called Chinese characteristics despite the fact that there is no generally accepted definition of Chinese characteristics. Although China has always been committed to keeping its policies consistent, the unstable nature of the policy basis of FICLBS will inevitably affect the future of FICLBS. However, since the opening-up policy of China will not possibly be reversed in the future, FICLBS will remain available for foreign investors no matter how the specific policies are changed.
America's Diverse Family Farms: 2020 Edition
Creators: name: Whitt, Christine
name: Todd, Jessica E.
name: MacDonald, James M.
name: Whitt, Christine
name: Todd, Jessica E.
name: MacDonald, James M.
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Farm Management
subject: Land Economics/Use
subject: Family farms, agricultural production, farm typology, small farms, midsize farms, large farms, farm household income, Agricultural Resource Management Survey (ARMS), principal farm operator, spouse, farm financial performance, operating profit margin (OPM), off-farm income, self-employment, farm ownership, Government payments, commodity specializations, farm succession, direct sales, women in agriculture, value of production, 2019

description: Broad descriptions of farms based on U.S. averages can mask variations among farm sizes and types. For example, in 2019, the average value of production on the 2 million U.S. farms amounted to $168,218. Few farms, however, are near the average: Almost half of the farms had production valued at $6,000 or less, while more than 60 percent of all production occurred on farms with at least $1 million of agricultural output. This report uses a farm classification, or typology, developed by USDA’s Economic Research Service (ERS) to categorize farms into more homogeneous groupings to better understand conditions across the Nation’s diverse farm sector. The classification is based largely on the annual revenue of the farm, the main occupation of the farm’s principal producer, and family or non-family ownership of the farm. In this report, there are many sections that appear every year. The data and statistics for these sections are generally similar across the years. The operating profit margin section has varied the most over the years because of the variability in the farm economy.
Quantum Transport with Spin Dephasing: A Nonequilibrium Green's Function Approach
Creators: name: Yanik, Ahmet Ali
name: Klimeck, Gerhard
name: Datta, Supriyo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A quantum transport model incorporating spin scattering processes is presented using the non-equilibrium Green's function (NEGF) formalism within the self-consistent Born approximation. This model offers a unified approach by capturing the spin-flip scattering and the quantum effects simultaneously. A numerical implementation of the model is illustrated for magnetic tunnel junction devices with embedded magnetic impurity layers. The results are compared with experimental data, revealing the underlying physics of the coherent and incoherent transport regimes. It is shown that small variations in magnetic impurity spin-states/concentrations could cause large deviations in junction magnetoresistances.
description: NEGF Formalism, Spin Dephasing, Magnetic Tunnel Junctions, Magnetoresistance
Dynamic interaction induced explosive death
Creators: name: Dixit, Shiva
name: Chowdhury, Sayantan Nag
name: Ghosh, Dibakar
name: Shrimali, Manish Dev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Most previous studies on coupled dynamical systems assume that all interactions between oscillators take place uniformly in time, but in reality, this does not necessarily reflect the usual scenario. The heterogeneity in the timings of such interactions strongly influences the dynamical processes. Here, we introduce a time-evolving state-space dependent coupling among an ensemble of identical coupled oscillators, where individual units are interacting only when the mean state of the system lies within a certain proximity of the phase space. They interact globally with mean-field diffusive coupling in a certain vicinity and behave like uncoupled oscillators with self-feedback in the remaining complementary subspace. Interestingly due to this occasional interaction, we find that the system shows an abrupt explosive transition from oscillatory to death state. Further, in the explosive death transitions, the oscillatory state and the death state coexist over a range of coupling strengths near the transition point. We explore our claim using Van der pol, FitzHughNagumo and Lorenz oscillators with dynamic mean field interaction. The dynamic interaction mechanism can explain sudden suppression of oscillations and concurrence of oscillatory and steady state in biological as well as technical systems.
The essential spectrum of Schrödinger operators on lattices
Creators: name: Rabinovich, Vladimir S.
name: Roch, Steffen
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81Q10, 47B36, 46N50

description: The paper is devoted to the study of the essential spectrum of discrete Schrödinger operators on the lattice $\mathbb{Z}^{N}$ by means of the limit operators method. This method has been applied by one of the authors to describe the essential spectrum of (continuous) electromagnetic Schrödinger operators, square-root Klein-Gordon operators, and Dirac operators under quite weak assumptions on the behavior of the magnetic and electric potential at infinity. The present paper is aimed to illustrate the applicability and efficiency of the limit operators method to discrete problems as well. We consider the following classes of the discrete Schrödinger operators: 1) operators with slowly oscillating at infinity potentials, 2) operators with periodic and semi-periodic potentials; 3) Schrödinger operators which are discrete quantum analogs of the acoustic propagators for waveguides; 4) operators with potentials having an infinite set of discontinuities; and 5) three-particle Schrödinger operators which describe the motion of two particles around a heavy nuclei on the lattice $\mathbb{Z}^3$.
description: 22 pages
The evolution of additional (hidden) quantum variables in the interference of Bose-Einstein condensates
Creators: name: Mullin, W. J.
name: Krotkov, R.
name: Laloë, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Additional variables (also often called ``hidden variables'') are sometimes added to standard quantum mechanics in order to remove its indeterminism or ``incompletness,'' and to make the measurement process look more classical. Here we discuss a case in which an additional variable arises almost spontaneously from the quantum formalism: the emergence of relative phase between two highly populated Fock state Bose-Einstein condensates. The model simulated here involves the interference of two Bose condensates, one with all up spins, and the other with down spins, along a z-axis. With the clouds overlapping, we consider the results of measuring spins in a transverse plane (the general direction is studied in an appendix). The determination of the previously ``hidden'' phase becomes progressively more definite as additional measurements are made. We also provide an analysis of a recent and closely related experiment.
description: 27 pages, 7 figures
Multiferroicity induced by dislocated spin-density waves
Creators: name: Betouras, Joseph J.
name: Giovannetti, Gianluca
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We uncover a new pathway towards multiferroicity, showing how magnetism can drive ferroelectricity without relying on inversion symmetry breaking of the magnetic ordering. Our free-energy analysis demonstrates that any commensurate spin-density-wave ordering with a phase dislocation, even if it is collinear, gives rise to an electric polarization. Due to the dislocation the electronic and magnetic and inversion centers do not coincide, which turns out to be a sufficient condition for multiferroic coupling. The novel mechanism explains the formation of multiferroic phases at the magnetic commensurability transitions, such as the ones observed in YMn$_{2}$O$_{5}$ and related compounds. We predict that in these multiferroics an oscillating electrical polarization is concomitant with the uniform polarization. On the basis of our theory we put forward new types of magnetic materials that are potentially ferroelectric.
description: 4 pages, Phys. Rev. Letters, in press
6G in the Sky: On-Demand Intelligence at the Edge of 3D Networks
Creators: name: Strinati, Emilio Calvanese
name: Barbarossa, Sergio
name: Choi, Taesang
name: Pietrabissa, Antonio
name: Giuseppi, Alessandro
name: De Santis, Emanuele
name: Vidal, Josep
name: Becvar, Zdenek
name: Haustein, Thomas
name: Cassiau, Nicolas
name: Costanzo, Francesca
name: Kim, Junhyeong
name: Kim, Ilgyu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: 6G will exploit satellite, aerial and terrestrial platforms jointly to improve radio access capability and to unlock the support of on-demand edge cloud services in the three dimensional space (3D) by incorporating Mobile Edge Computing (MEC) functionalities on aerial platforms and low orbit satellites. This will extend the MEC support to devices and network elements in the sky and will forge a space borne MEC enabling intelligent personalized and distributed on demand services. 3D end users will experience the impression of being surrounded by a distributed computer fulfilling their requests in apparently zero latency. In this paper, we consider an architecture providing communication, computation, and caching (C3) services on demand, anytime and everywhere in 3D space, building on the integration of conventional ground (terrestrial) base stations and flying (non-terrestrial) nodes. Given the complexity of the overall network, the C3 resources and the management of the aerial devices need to be jointly orchestrated via AI-based algorithms, exploiting virtualized networks functions dynamically deployed in a distributed manner across terrestrial and non-terrestrial nodes.
Wavefunctions in dS/CFT revisited: principal series and double-trace deformations
Creators: name: Isono, Hiroshi
name: Liu, Hoiki Madison
name: Noumi, Toshifumi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study wavefunctions of heavy scalars on de Sitter spacetime and their implications to dS/CFT correspondence. In contrast to light fields in the complementary series, heavy fields in the principal series oscillate outside the cosmological horizon. As a consequence, the quadratic term in the wavefunction does not follow a simple scaling and so it is hard to identify it with a conformal two-point function. In this paper, we demonstrate that it should be interpreted as a two-point function on a cyclic RG flow which is obtained by double-trace deformations of the dual CFT. This is analogous to the situation in nonrelativistic AdS/CFT with a bulk scalar whose mass squared is below the Breitenlohner-Freedman (BF) bound. We also provide a new dS/CFT dictionary relating de Sitter two-point functions and conformal two-point functions in the would-be dual CFT.
description: 23 pages, 1 figure, 2 tables
Vibrationally Resolved Coupled Cluster X-Ray Absorption Spectra from Vibrational Configuration Interaction Anharmonic Calculations
Creators: name: Moitra, Torsha
name: Madsen, Diana
name: Christiansen, Ove
name: Coriani, Sonia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Vibrationally resolved near-edge x-ray absorption spectra at the K-edge for a number of small molecules have been computed from anharmonic vibrational configuration interaction calculations of the Franck-Condon factors. The potential energy surfaces for ground and core-excited states were obtained at the core-valence separated CC2, CCSD, CCSDR(3), and CC3 levels of theory, employing the Adaptive Density-Guided Approach (ADGA) scheme to select the single points at which to perform the energy calculations. We put forward an initial attempt to include pair-mode coupling terms to describe the potential of polyatomic molecules
Analytical model of the enhanced light transmission through subwavelength metal slits: Green's function formalism versus Rayleigh's expansion
Creators: name: Kukhlevsky, S. V.
name: Mechler, M.
name: Samek, O.
name: Janssens, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an analytical model of the resonantly enhanced transmission of light through a subwavelength nm-size slit in a thick metal film. The simple formulae for the transmitted electromagnetic fields and the transmission coefficient are derived by using the narrow-slit approximation and the Green's function formalism for the solution of Maxwell's equations. The resonance wavelengths are in agreement with the semi-analytical model [Y. Takakura, Phys. Rev. Lett. 86, 5601 (2001)], which solves the wave equations by using the Rayleigh field expansion. Our formulae, however, show great resonant enhancement of a transmitted wave, while the Rayleigh expansion model predicts attenuation. The difference is attributed to the near-field subwavelength diffraction, which is not considered by the Rayleigh-like expansion models.
description: submitted to Appl. Phys. B, 8 December 2005; corrected typos
Les risques spécifiques aux comptes d'investissement    à l'égard de la réglementation Baloise
Creators: name: Chati Youssef
name: Solhi Sanae
Publisher: name: Zenodo
Year: 2024

description: L'objectif du présent article est de tester empiriquement les différents instruments proposés par les Accords de Bâle pour la RCD afin d'optimiser la performance des PSIA. A travers cet article, nous proposons un modèle de mesure du RCD basé sur des méthodes avancées, telles que la VaR (Value at Risk) et l'ES (Expected Shortfall) sur une sélection de banques islamiques situées à la Jordanie. Afin de tester son efficacité, nous comparons les résultats de notre approche avec le capital requis pour couvrir le RCD selon l'approche proposée par IFSB. notre modèle confirme l'exposition des BI jordaniennes au RCD et montre son efficacité par rapport à l'approche de l'IFSB. Le modèle fournit, alors, une évaluation plus précise du RCD tout en se basant sur les caractéristiques internes des BI.
Gravity surface wave turbulence in a laboratory flume
Creators: name: Denissenko, Petr
name: Lukaschuk, Sergei
name: Nazarenko, Sergey
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present experimental results for water wave turbulence excited by piston-like programmed wavemakers in a water flume with horisontal dimensions 6x12x1.5 meters. Our main finding is that for a wide range of excitation amplitudes the energy spectrum has a power-law scaling, $E_ω\sim ω^{-ν}$. These scalings were achieved in up to one-decade wide frequency range, which is significantly wider than the range available in field observations and in numerical simulations. However, exponent $ν$ appears to be non-universal. It depends on the wavefield intensity and ranges from about 6.5 for weak forcing to about 3.5 for large levels of wave excitations. We discuss our results in the context of the key theoretical predictions, such as Zakharov-Filonenko spectrum $ν=-4$, Phillips spectrum $ν= -5$, Kuznetsov's revision of Phillips spectrum (leading to $ν=-4$) and Nazarenko's prediction $ν=-6$ for weak turbulence in finite basins. We measured Probability Density Function of the surface elevation and good correspondence with the Tayfun shapeexcept values near the maximum which we attribute to an anisotropy and inhomogeneity caused by the finite flume size. We argue that the wavenumber discreteness, due to the finite-size of the flume, prevents four-wave resonant interactions. Therefore, statistical evolution of the water surface in the laboratory is significantly different than in the open ocean conditions.
description: 17 pages, 12 figures
Quantification and prediction of wall slough in open stope mining methods
Creators: name: Mah, Samuel Gee Leon
Publisher: name: University of British Columbia
Year: 2009

description: The objective of this thesis is to present a reliable estimate of dilution that can be readily applied for evaluating open stope stability. In the past, dilution has been a difficult term to quantify due to the inaccessibility of representative data. With the introduction of the Cavity Monitoring System (CMS), it is now practical for mine operators to collect realistic, threedimensional stope profiles for the purpose of identifying unplanned dilution in the form of wall slough. This thesis describes a methodology for interpreting CMS data. Analysis of CMS data enables one to identify and measure unplanned dilution. It is proposed that unplanned dilution be represented in the form of Equivalent Linear Over-break Slough (ELOS) measurements. Since dilution is considered an ideal measure of stope performance, it will be used to calibrate several commonly used stope design curves. In order to facilitate calibration, a CMS database (96 obs.) has been accumulated from various Canadian underground open stoping operations. The bulk of the database has been collected from the Detour Lake Mine (DLM), Placer Dome Canada over a period of two years. At DLM, three baseline design curves have been developed and successfully calibrated for implementation: • Pillar Failure Curve (3-D Numerical Modelling) • Blast Damage Criteria (Vibration Monitoring - Scaled Distance Approach) • Open Stope Design (Modified Stability Method). It has been found that the CMS instrument provides the most reliable information for calculating dilution and calibrating design curves. The application of these design tools will enable the mine operator to anticipate and hence reduce dilution incurred from open stope mining methods.
AlCl$_{3}$-dosed Si(100)-2$\times$1: Adsorbates, chlorinated Al chains, and incorporated Al
Creators: name: Radue, Matthew S.
name: Baek, Sungha
name: Farzaneh, Azadeh
name: Dwyer, K. J.
name: Campbell, Quinn
name: Baczewski, Andrew D.
name: Bussmann, Ezra
name: Wang, George T.
name: Mo, Yifei
name: Misra, Shashank
name: Butera, R. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The adsorption of AlCl$_{3}$ on Si(100) and the effect of annealing the AlCl$_{3}$-dosed substrate was studied to reveal key surface processes for the development of atomic-precision acceptor-doping techniques. This investigation was performed via scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations. At room temperature, AlCl$_{3}$ readily adsorbed to the Si substrate dimers and dissociated to form a variety of species. Annealing of the AlCl$_{3}$-dosed substrate at temperatures below 450 $^{\circ}$C produced unique chlorinated aluminum chains (CACs) elongated along the Si(100) dimer row direction. An atomic model for the chains is proposed with supporting DFT calculations. Al was incorporated into the Si substrate upon annealing at 450 $^{\circ}$C and above, and Cl desorption was observed for temperatures beyond 450 $^{\circ}$C. Al-incorporated samples were encapsulated in Si and characterized by secondary ion mass spectrometry (SIMS) depth profiling to quantify the Al atom concentration, which was found to be in excess of 10$^{20}$ cm$^{-3}$ across a $\sim$2.7 nm thick $δ$-doped region. The Al concentration achieved here and the processing parameters utilized promote AlCl$_{3}$ as a viable gaseous precursor for novel acceptor-doped Si materials and devices for quantum computing.
description: 35 pages, 8 figures
Letter from J. Corbet at The Canadian Bank of Commerce to "Sir" [James Goldie], July 11, 1913
Creators: name: Canadian Bank Of Commerce
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to "Sir" [James Goldie] from J. Corbet at The Canadian Bank of Commerce, dated July 11, 1913, regarding a meeting of James Goldie's directors.
Generating a topological anomalous Hall effect in a non-magnetic conductor
Creators: name: Cullen, James H.
name: Bhalla, Pankaj
name: Marcellina, Elizabeth
name: Hamilton, Alexander R.
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The ordinary Hall effect is driven by the Lorentz force, while its anomalous counterpart occurs in ferromagnets. Here we show that the Berry curvature monopole of non-magnetic 2D spin-3/2 holes leads to a novel Hall effect linear in an applied in-plane magnetic field B_x. There is no Lorentz force hence no ordinary Hall effect, while all disorder contributions vanish to leading order in B_x. This intrinsic phenomenon, which we term the anomalous planar Hall effect (APHE), provides a non-quantized footprint of topological transport directly accessible in p-type semiconductors.
description: 5 pages, 4 figures
Careables Final Dissemination and Sustainability Report
Creators: name: Mamitzsch, Sandra
name: Gitau, Mugethi
name: Elgharib, Fadia
Publisher: name: Zenodo
Year: 2020
Subjects: Open Source Hardware
healthcare
co-creation

description: This report sums up the most important communication and outreach activities, shows the reach we gained overall for the Careables activities during the H2020 funded project duration and gives an outlook into the future work on the Careables platform the partners agreed to.
Aspects of melody, harmony, and texture in the solo songs of Jean Sibelius
Creators: name: Canales, Alexa
Publisher: name: No Publisher Supplied
Year: 2023

description: The solo songs make up a significant portion of Jean Sibelius’ total musical output. These pieces are not as well known as his orchestral works, however, and have received less attention in the scholarly literature. In this paper, I analyze a selection of songs written between 1891 and 1918. My analyses include the areas of texture, harmony, and melody. This reveals important features of Sibelius’ style which appear most forcefully in his vocal writing, features which contribute to the larger narrative of Sibelius as a composer and our understanding of his musical style.
title: Prisons of the Imagination: Carceral Ideology and Race in Science Fiction
Creators: name: Avant Blachman, Daniel Allen
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2024

description: Popular science fiction film and television media commonly deploy narratives and images of prisons and policing, and these discourses in turn are inseparable from racial formations. At the same time, many fans and theorists view science fiction as a genre with immense potential for offering critical consideration of the difference between the fictional and the real world. This thesis examines a range of case studies from popular film and television exemplifying this tension between the perceived generative critical potential of science fiction media and apparent tendency of popular media productions to nearly always fall back on well-worn white supremacist, patriarchal, and capitalist tropes upholding dominant power structures. Through its analysis, the project interrogates the subversive, critical sensibility that undergirds much science fiction media and that is often at odds with the hegemonic ideologies embedded in their representations of the carceral future.

Case studies include imprisonment narratives in the utopian universe of Star Trek; racial representation and “copaganda” in the RoboCop movie franchise; and the theme of punishment as a racialized public mass-media spectacle in episodes of the BBC/Netflix anthology series Black Mirror. Examination of each of these sites includes textual analysis, representational analysis, and media industry and production analysis. This research shows how Henry Giroux’s concept of the “disimaginative” offers a productive means of framing the denial––if not eradication––of restorative justice in futuristic crime and punishment narratives. The thesis concludes by considering how independent Afrofuturist media are offering new frameworks for imagining restorative and transformative justice in future imaginary spaces.

Even as fans often celebrate science fiction as a space for challenging hegemonic power, it is simultaneously a space in which those same ideological forces can be bolstered and made to seem inevitable. Highlighting the narrowness of the popular-media future imaginary can facilitate a reconsideration of what that space could be, and by foregrounding Afrofuturist creators, the thesis concludes by highlighting progressive science fiction visions that challenge dominant power structures.
Empirical oscillating potentials for alloys from ab-initio fits
Creators: name: Mihalkovič, M.
name: Henley, C. L.
name: Widom, M.
name: Ganesh, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By fitting to a database of ab-initio forces and energies, we can extract pair potentials for alloys, with a simple six-parameter analytic form including Friedel oscillations, which give a remarkably faithful account of many complex intermetallic compounds. As examples we show results for (crystal or quasicrystal) structure prediction and phonon spectrum for three systems: Fe--B, Al--Mg--Zn, and Al--Cu--Fe.
description: 5 pages 3 figures 2 tables
Discovery of a ~30-Year-Duration Post-Nova Pulsating Supersoft Source in the Large Magellanic Cloud
Creators: name: Vasilopoulos, G.
name: Koliopanos, F.
name: Woods, T. E.
name: Haberl, F.
name: Soraisam, M. D.
name: Udalski, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supersoft X-ray sources (SSS) have been identified as white dwarfs accreting from binary companions and undergoing nuclear-burning of the accreted material on their surface. Although expected to be a relatively numerous population from both binary evolution models and their identification as Type Ia supernova progenitor candidates, given the very soft spectrum of SSSs relatively few are known. Here we report on the X-ray and optical properties of 1RXS J050526.3-684628, a previously unidentified accreting nuclear-burning white dwarf located in the Large Magellanic Cloud (LMC). XMM-Newton observations enabled us to study its X-ray spectrum and measure for the first time short period oscillations of ~170 s. By analysing newly obtained X-ray data by eROSITA, together with Swift observations and archival ROSAT data, we have followed its long-term evolution over the last 3 decades. We identify 1RXS J050526.3-684628 as a slowly-evolving post-nova SSS undergoing residual surface nuclear-burning, which finally reached its peak in 2013 and is now declining. Though long expected on theoretical grounds, such long-lived residual-burning objects had not yet been found. By comparison with existing models, we find that the effective temperature and luminosity evolution are consistent with a ~0.7 $M_{\odot}$ carbon-oxygen white dwarf accreting ~10$^{-9}~\rm{M}_{\odot}$/yr. Our results suggest there may be many more undiscovered SSSs and "missed" novae awaiting dedicated deep X-ray searches in the LMC and elsewhere.
description: 9 pages, 4 figures, accepted for publication in MNRAS
Supporting NASA's Open-Source Science Initiative Utilizing FAIR Data Principles and Practices
Creators: name: Peng, Ge
name: Robert, Robert
name: Parsons, Mark
name: Ramapriyan, Hampapuram
name: Liu, Zhong
name: Ramachandran, Bhaskar
name: Moroni, David
name: Mears, Carl
name: Chen, Gao
name: O'FAIR Working group, NASA ESDS
Publisher: name: Zenodo
Year: 2023
Subjects: Open data
Open science
Free data
FAIR data
NASA
AGU2023
SPD-41a

description: The year 2023 is designated the Year of Open Science in the US. NASA has been campaigning for open science by promoting open sharing of data, software, results, and knowledge. The latest NASA Scientific Information Policy for the Science Mission Directorate (SMD; aka, SPD-41a) brings together current federal requirements, NASA policies, and guidance on the sharing and reuse of federally funded scientific data and results. The SPD-41a information policy requires the free availability and open sharing of all NASA SMD-funded scientific data, information, metadata, documentation, publications, and software. It also explicitly recommends – for the first time – that all NASA-funded scientific data follow the FAIR (Findable, Accessible, Interoperable, Reusable) Guiding Principles. This policy will undoubtedly impact how NASA-funded data producers generate and disseminate their datasets, how data centers/repositories manage their data stewardship workflows, and how data users are able to access all necessary artifacts to reproduce end-to-end science data processing workflows. Furthermore, the implementation of this policy will require synergistic collaboration between data producers and repositories.

 

The Open, Free & FAIR Working Group (O’FAIR WG) was established in May 2022 as one of NASA’s Earth Science Data System Working Groups (ESDSWG). Its objective is to bridge the SPD-41a policy with implementation efforts by providing principle-by-principle guidance regarding how best to leverage existing community practices to ensure and enable the virtues of FAIR Principles for SMD-funded Earth science data. The guide document aims to address stakeholders’ challenges and facilitate synergies, providing practical solutions to questions such as: What does FAIR mean to us (data producers, stewards, repositories, users, etc.)? We think our datasets are FAIR but, how can we know for sure? If not, what FAIR practices should we adopt? 

 

This presentation describes the approaches for developing the guide document, activities, and progress made by the working group.
Set characterizations and convex extensions for geometric convex-hull proofs
Creators: name: Bärmann, Andreas
name: Schneider, Oskar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C57, 52B05, 90C10, 90C27, 90C25

description: In the present work, we consider Zuckerberg's method for geometric convex-hull proofs introduced in [Geometric proofs for convex hull defining formulations, Operations Research Letters 44(5), 625-629 (2016)]. It has only been scarcely adopted in the literature so far, despite the great flexibility in designing algorithmic proofs for the completeness of polyhedral descriptions that it offers. We suspect that this is partly due to the rather heavy algebraic framework its original statement entails. This is why we present a much more lightweight and accessible approach to Zuckerberg's proof technique, building on ideas from [Extended formulations for convex hulls of some bilinear functions, Discrete Optimization 36, 100569 (2020)]. We introduce the concept of set characterizations to replace the set-theoretic expressions needed in the original version and to facilitate the construction of algorithmic proof schemes. Along with this, we develop several different strategies to conduct Zuckerberg-type convex-hull proofs. Very importantly, we also show that our concept allows for a significant extension of Zuckerberg's proof technique. While the original method was only applicable to 0/1-polytopes, our extended framework allows to treat arbitrary polyhedra and even general convex sets. We demonstrate this increase in expressive power by characterizing the convex hull of Boolean and bilinear functions over polytopal domains. All results are illustrated with indicative examples to underline the practical usefulness and wide applicability of our framework.
Fatigue behaviour and size effect perpendicular to the grain of laminated Douglas fir veneer
Creators: name: Norlin, Lars Peter
Publisher: name: University of British Columbia
Year: 2009

description: The rolling shear behaviour of laminated Douglas fir veneers was studied using specimens with 15 layers of 2.5 mm veneers. The 3 central layers were cross-plies with grain angle oriented perpendicular to the long axis of the specimen. The other layers were orthogonal to the central layers. Based on three specimen sizes, the width effect and load configuration effect for rolling shear failures of laminated veneer panels subjected to "flatwise" three-point bending was experimentally and theoretically evaluated. The rolling shear fatigue performance of the specimens was studied through cyclic testing until failure. Series of specimens were tested at three mean stress levels, 95%, 91%, and 83% of the of the mean static strength. A damage model which took the stress history into consideration was calibrated to the experimental data. Good agreement between model predictions and experimental results were obtained. Using a size adjustment factor, the model was verified by two cyclically tested series of specimens of different size. The size adjusted model predictions were found to agree well with the experimental data.
OB associations and their origins
Creators: name: Wright, Nicholas J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: OB associations are unbound groups of young stars made prominent by their bright OB members, and have long been thought to be the expanded remnants of dense star clusters. They have been important in astrophysics for over a century thanks to their luminous massive stars, though their low-mass members have not been well studied until the last couple of decades. This has changed thanks to data from X-ray observations, spectroscopic surveys and astrometry from Gaia that allows their full stellar content to be identified and their dynamics to be studied, which in turn is leading to changes in our understanding of these systems and their origins, with the old picture of Blaauw (1964) now being superseded. It is clear now that OB associations have considerably more substructure than once envisioned, both spatially, kinematically and temporally. These changes have implications for the star formation process, the formation and evolution of planetary systems, and the build-up of stellar populations across galaxies.
description: 53 pages, 25 figures, accepted for publication in New Astronomy Reviews
Corrosion Evaluation of Mechanically Stabilized Earth Walls
Creators: name: Beckham, Tony L.
name: Sun, Liecheng
name: Hopkins, Tommy C.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2005
Subjects: subject: Transportation Engineering

description: Numerous reinforced walls and slopes have been built over the past four decades in Kentucky, the United States, as well as worldwide. Tensile elements used in constructing low-cost reinforcing walls and slopes consist of metal polymer strips or grids. Although reinforced structures have been used extensively, the effects of corrosion on the metal tensile elements are unknown. Mechanically stabilized earth walls are expected to remain stable for many decades. An examination of the effects of corrosion of metal tensile elements used to construct these walls can provide invaluable data regarding the longevity of reinforced walls and slopes. Four mechanically stabilized earth walls constructed with galvanized steel reinforcing elements were instrumented and corrosion rates obtained. Corrosion data obtained indicate the designed sacrificial thickness will not be used during the design life of the structures. No visible corrosion was observed in reinforcing elements removed from a mechanically stabilized earth wall that had been in service for more than 20 years. A database was constructed to manage inventory of mechanically stabilized earth walls constructed and maintained by the Kentucky Transportation Cabinet.
Seismic-Hazard Maps and Time Histories for the Commonwealth of Kentucky
Creators: name: Wang, Zhenming
name: Harik, Issam E.
name: Woolery, Edward W.
name: Shi, Baoping
name: Peiris, Abheetha
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2008
Subjects: subject: Transportation Engineering

description: The ground-motion hazard maps and time histories for three earthquake scenarios, expected earthquakes, probable earthquakes, and maximum credible earthquakes on the free surface in hard rock (shear-wave velocity >1,500 m/s), were derived using the deterministic seismic hazard analysis. The results are based on (1) historical observations, (2) instrumental records, and (3) current understanding of the earthquake source, recurrence, and ground-motion attenuation relationship in the central United States. It is well understood that there are uncertainties in the ground motion hazard maps because of the uncertainties inherent in parameters such as earthquake location, magnitude, and frequency used in the study. This study emphasizes the earthquakes that would have maximum impacts on humans and structures. The ground-motion parameters, including time histories, are intended for use in the recommended zone (not site-specific) where the structure is assumed to be situated at the top of a bedrock foundation. For sites underlain by soils, and in particular for sites underlain by poorly consolidated soils, it is recommended that site-specific investigations be conducted by qualified professionals in order to determine the possibilities of amplification, liquefaction, slope failure, and other considerations when subjected to the ground motions.
The Abelian/Nonabelian Correspondence and Frobenius Manifolds
Creators: name: Ciocan-Fontanine, Ionut
name: Kim, Bumsig
name: Sabbah, Claude
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We propose an approach via Frobenius manifolds to the study (began in math.AG/0407254) of the relation between rational Gromov-Witten invariants of nonabelian quotients X//G and those of the corresponding ``abelianized'' quotients X//T, for T a maximal torus in G. The ensuing conjecture expresses the Gromov-Witten potential of X//G in terms of the potential of X//T. We prove this conjecture when the nonabelian quotients are partial flag manifolds.
description: 35 pages, no figures
Measuring the Value of Kentucky Vehicle Enforcement Activities
Creators: name: Walton, Jennifer R.
name: Crabtree, Joseph D.
name: Wallace, Candice Y.
name: Pigman, Jerry G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2008
Subjects: subject: Transportation Engineering

description: The responsibility for monitoring commercial vehicles on Kentucky’s roadways and enforcing the applicable laws and regulations falls primarily on Kentucky Vehicle Enforcement (KVE). KVE personnel are involved in a variety of activities including commercial vehicle size and weight enforcement, work zone speed enforcement, and general traffic monitoring and enforcement. The objectives of this study were to identify, describe, and (where possible) quantify the benefits associated with the activities of KVE. The primary benefits provided by the activities of KVE are: reductions in crashes, injuries, and fatalities; protection of the revenue streams that replenish Kentucky’s Road Fund; reduced damage to Kentucky’s surface transportation infrastructure; and creating a level playing field for Kentucky’s motor carrier industry. Using the best estimates available for crash reductions, revenue protection, and infrastructure protection, KVE activities in these areas are worth approximately $70 million to $130 million annually.
Organic Molecules in the Galactic Center. Hot Core Chemistry without Hot Cores
Creators: name: Requena-Torres, M. A.
name: Martín-Pintado, J.
name: Rodríguez-Franco, A.
name: Martín, S.
name: Rodríguez-Fernández, N. J.
name: de Vicente, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the origin of large abundances of complex organic molecules in the Galactic center (GC). We carried out a systematic study of the complex organic molecules CH3OH, C2H5OH, (CH3)2O, HCOOCH3, HCOOH, CH3COOH, H2CO, and CS toward 40 GC molecular clouds. Using the LTE approximation, we derived the physical properties of GC molecular clouds and the abundances of the complex molecules.The CH3OH abundance between clouds varies by nearly two orders of magnitude from 2.4x10^{-8} to 1.1x10^{-6}. The abundance of the other complex organic molecules relative to that of CH3OH is basically independent of the CH3OH abundance, with variations of only a factor 4-8. The abundances of complex organic molecules in the GC are compared with those measured in hot cores and hot corinos, in which these complex molecules are also abundant. We find that both the abundance and the abundance ratios of the complex molecules relative to CH3OH in hot cores are similar to those found in the GC clouds. However, hot corinos show different abundance ratios than observed in hot cores and in GC clouds. The rather constant abundance of all the complex molecules relative to CH3OH suggests that all complex molecules are ejected from grain mantles by shocks. Frequent (similar 10^{5}years) shocks with velocities >6km/s are required to explain the high abundances in gas phase of complex organic molecules in the GC molecular clouds. The rather uniform abundance ratios in the GC clouds and in Galactic hot cores indicate a similar average composition of grain mantles in both kinds of regions. The Sickle and the Thermal Radio Arches, affected by UV radiation, show different relative abundances in the complex organic molecules due to the differentially photodissociation of these molecules.
description: 18 pages, 10 Postscript figures, uses aa.cls, aa.bst, 10pt.rtx, natbib.sty, revsymb.sty revtex4.cls, aps.rtx and aalongtabl.sty. Accepted in A&A 2006. version 2. relocated figures and tables. Language editor suggestions. added references
A pilot study on the gait kinematics in children with autism during perturbations of visual scene and support surface
Creators: name: Chen, Lingfeng
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Autism Spectrum Disorder
Gait
Walking
Margin of stability
Walking stability
Visual perturbation
Treadmill perturbation

description: Children with Autism Spectrum Disorder (ASD) have been widely reported to exhibit motor impairment. Previous studies of gait in children with ASD using an over-ground walking task suggest the walking kinematics and kinetics in children with ASD are atypical when compared to typically developing children (TDC). Considering walking in real life is often perturbed by sensory stimuli and that atypical sensory processing has been found in children with ASD, walking under sensory perturbations seems to be a reasonable approach for detecting possible walking abnormalities in individuals on the spectrum. The present study employed a gait perturbation protocol to evaluate the gait kinematics of children with ASD under a visually and proprioceptively challenging environments. We aimed to test whether children with ASD and TDC were similarly responsive to visual and treadmill perturbations (VP and TP). The second aim was to investigate how children with ASD and TDC recovered from VP and TP. Lastly, we intended to determine whether there were group differences in using the visual reference as a stabilizer of gait during a TP. Two children with ASD (8 and 11 years of age) and two TDC (ages 8 and 7 years) walked in the V-gait system (Motekforce Link, Amsterdam, Netherlands). When walking under VP, all four participants showed an increase in step width, and decrease in step time. One child with ASD exhibited greater magnitude of changes in gait kinematics under VP than other three participants. Both children with ASD exhibited a greater increase in step width variability compared to TDC. Under TP, all four participants applied shorter and faster steps. While one child with ASD showed decreased step width, the step width of other three participants during TP were increased. When VP/TP was over, all participants exhibited a tendency to recover their gait kinematics and stability to the opposite direction of the effects of VP/TP. All but one child with ASD recovered their gait kinematics when the visual cues turned on. These findings point to children with ASD seeming to exhibit similar but exaggerated gait responses to VP and TP when compared to TDC. Some children with ASD show deficits in using the visual information to stabilize gait. Thus, the visual motor coordination might be impaired in children with ASD. Future studies using similar perturbation protocol but with bigger sample size are needed.