cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
SmashEx: Smashing SGX Enclaves Using Exceptions
Creators: name: Cui, Jinhua
name: Yu, Jason Zhijingcheng
name: Shinde, Shweta
name: Saxena, Prateek
name: Cai, Zhiping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Exceptions are a commodity hardware functionality which is central to multi-tasking OSes as well as event-driven user applications. Normally, the OS assists the user application by lifting the semantics of exceptions received from hardware to program-friendly user signals and exception handling interfaces. However, can exception handlers work securely in user enclaves, such as those enabled by Intel SGX, where the OS is not trusted by the enclave code? In this paper, we introduce a new attack called SmashEx which exploits the OS-enclave interface for asynchronous exceptions in SGX. It demonstrates the importance of a fundamental property of safe atomic execution that is required on this interface. In the absence of atomicity, we show that asynchronous exception handling in SGX enclaves is complicated and prone to re-entrancy vulnerabilities. Our attacks do not assume any memory errors in the enclave code, side channels, or application-specific logic flaws. We concretely demonstrate exploits that cause arbitrary disclosure of enclave private memory and code-reuse (ROP) attacks in the enclave. We show reliable exploits on two widely-used SGX runtimes, Intel SGX SDK and Microsoft Open Enclave, running OpenSSL and cURL libraries respectively. We tested a total of 14 frameworks, including Intel SGX SDK and Microsoft Open Enclave, 10 of which are vulnerable. We discuss how the vulnerability manifests on both SGX1-based and SGX2-based platforms. We present potential mitigation and long-term defenses for SmashEx.
description: Accepted to ACM CCS 2021
Price Studies of the U. S. Department of Agriculture Showing Demand-Price, Supply-Price, and Price-Production Relationships
Creators: name: Bercaw, Louise O.
name: Bercaw, Louise O.
Publisher: name: Unknown
Year: 1935
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: Attention should be called to the fact that items have been repeated in some cases in the three different sections of the bibliography. This makes it appear on first sight that there have been more price studies made by the Department than have actually been made.
Price Analysis -- Selected References on Supply and Demand Curves and Related Subjects, January 1928 - June 1933
Creators: name: Bercaw, Louise O.
name: Bercaw, Louise O.
Publisher: name: Unknown
Year: 1933
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: Excerpt from the report: This list had its origin in a request for a bibliography on supply and demand curves to supplement the list on p. 124-125 in Warren and Pearson's bulletin "Interrelationships of Supply and Price." (Item 123). It is designed to list references to material on price analysis published since 1927, although a few references to material published prior to that date, not included in the Warren end Pearson bulletin, have been listed. The footnote citations in many of the publications listed are an additional source of references to earlier material. No special search was made for specific analyses of prices other than agricultural prices or for references on price spreads. This list is the beginning of what it is hoped may grow into a comprehensive bibliography on price analysis.
Atom-atom correlations and relative number squeezing in dissociation of spatially inhomogeneous molecular condensates
Creators: name: Ogren, Magnus
name: Kheruntsyan, K. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study atom-atom correlations and relative number squeezing in the dissociation of a Bose-Einstein condensate (BEC) of molecular dimers made of either bosonic or fermionic atom pairs. Our treatment addresses the role of the spatial inhomogeneity of the molecular BEC on the strength of correlations in the short time limit. We obtain explicit analytic results for the density-density correlation functions in momentum space, and show that the correlation widths and the degree of relative number squeezing are determined merely by the shape of the molecular condensate.
description: Minor corrections, final published version
A Direct Approach to the Electromagnetic Casimir Energy in a Rectangular Waveguide
Creators: name: Valuyan, Madad Ali
name: Moazzemi, Reza
name: Gousheh, Siamak S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we compute the leading order Casimir energy for the electromagnetic field (EM) in an open ended perfectly conducting rectangular waveguide in three spatial dimensions by a direct approach. For this purpose we first obtain the second quantized expression for the EM field with boundary conditions which would be appropriate for a waveguide. We then obtain the Casimir energy by two different procedures. Our main approach does not contain any analytic continuation techniques. The second approach involves the routine zeta function regularization along with some analytic continuation techniques. Our two approaches yield identical results. This energy has been calculated previously for the EM field in a rectangular waveguide using an indirect approach invoking analogies between EM fields and massless scalar fields, and using complicated analytic continuation techniques, and the results are identical to ours. We have also calculated the pressures on different sides and the total Casimir energy per unit length, and plotted these quantities as a function of the cross-sectional dimensions of the waveguide. We also present a physical discussion about the rather peculiar effect of the change in the sign of the pressures as a function of the shape of the cross-sectional area.
description: 16 pages, 6 figures, iopart style, submitted to J. Phys. B: At. Mol. Opt
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Bernardo, Bruno
name: Marmsoler, Diego
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Security and privacy → Logic and verification
subject: Software and its engineering → Formal software verification
subject: Security and privacy → Distributed systems security
subject: Computer systems organization → Peer-to-peer architectures

description: Front Matter, Table of Contents, Preface, Conference Organization
description: OASIcs, Vol. 84, 2nd Workshop on Formal Methods for Blockchains (FMBC 2020), pages 0:i-0:xii
Particle dynamics on AdS_2 x S^2 background with two-form flux
Creators: name: Galajinsky, Anton
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Different aspects of particle dynamics on AdS_2 x S^2 background with two-form flux are discussed. These include solution of equations of motion, a canonical transformation to conformal mechanics and an N=4 supersymmetric extension.
description: V3: minor modifications, references added
THE OPTIMIZATION MODEL OF THE USE OF WATER RESOURCES IN THE AGRICULTURE OF A REGION TAKING INTO ACCOUNT ITS SPECIALIZATION
Creators: name: L.G. Matveeva
name: O. A. Chernova
name: N. A. Kosolapova
name: E. A. Likhatskaya
Publisher: name: Естественно-гуманитарные исследования
Year: 2020
Subjects: region
water resources
agriculture
optimization model of water consumption

description: The article provides the conceptual aspects of forming efficient policy of rational water consumption in the agriculture production of regions, specializing mainly in agriculture and for which the problem of sufficient water supply is a priority. We developed and verified an economic and mathematical model of optimization of the use of water resources in the agriculture of a region, taking into account of the hydroeconomic balance in the basin, the existing scheme of irrigation of lands under cultivation, availability of additional irrigation fund, the farming system recommended as the optimal one for this region, the technical state of irrigation network and the ameliorative state of the irrigated lands.
Fractures et solidarités numériques locales à l'épreuve de la continuité pédagogique en contexte de pandémie COVID-19
Creators: name: Alladatin, Judicaël
Publisher: name: Zenodo
Year: 2021
Subjects: solidarité numérique, fracture numérique, COVID 19, technologies éducatives, continuité pédagogique

description: Fractures et solidarités numériques locales à l’épreuve de la continuité pédagogique en contexte de pandémie COVID-19: Le cas de 5 écoles primaires au Maroc.
Sommerfeld corrections to type-II and III leptogenesis
Creators: name: Strumia, Alessandro
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study thermal leptogenesis from decays of the electroweak triplets that mediate neutrino masses in type-II and type-III see-saw. We find that Sommerfeld corrections reduce the baryon asymmetry by ~30%, and that successful leptogenesis needs triplets heavier than 1.6 TeV, beyond the discovery reach of LHC.
description: 12 pages, 4 figures, final version. The group theory of the non-abelian Sommerfeld effect presented in this paper can be relevant for scenarios of Dark Matter charged under new dark gauge groups, as suggested by recent data
Magnetic Properties of Ni-Fe Nanowire Arrays: Effect of Template Material and Deposition Conditions
Creators: name: Aravamudhan, Shyam
name: Singleton, John
name: Goddard, Paul A.
name: Bhansali, Shekhar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The objective of this work is to study the magnetic properties of arrays of Ni-Fe nanowires electrodeposited in different template materials such as porous silicon, polycarbonate and alumina. Magnetic properties were studied as a function of template material, applied magnetic field (parallel and perpendicular) during deposition, wire length, as well as magnetic field orientation during measurement. The results show that application of magnetic field during deposition strongly influences the c-axis preferred orientation growth of Ni-Fe nanowires. The samples with magnetic field perpendicular to template plane during deposition exhibits strong perpendicular anisotropy with greatly enhanced coercivity and squareness ratio, particularly in Ni-Fe nanowires deposited in polycarbonate templates. In case of polycarbonate template, as magnetic field during deposition increases, both coercivity and squareness ratio also increase. The wire length dependence was also measured for polycarbonate templates. As wire length increases, coercivity and squareness ratio decrease, but saturation field increases. Such magnetic behavior (dependence on template material, magnetic field, wire length) can be qualitatively explained by preferential growth phenomena, dipolar interactio
description: 26 pages, 7 figures, 5 Tables Submitted to Physical Review B
title: Real Virtual Partical anhilations
title: Space evaporation
titleType: Subtitle
Creators: name: Sohail, Sohail
Publisher: name: Zenodo
Year: 2025
Subjects: Unification
Blackholes
Astrophysics
Telescope
Integral
Gravity

description: Real virtual particals anhilations occure near at event horizon and also the NS , WD.this paper predict

1- the existence of quantam clocks goverened by uncertainty in spacetime.

2-spacetime closcks dilates similarly as GR clocks under gravity

3-additive gravitational pull by binary or more objects in a G field modified the clocks commulativly.

4-Real virtual anhilations due to ∆t dilations in a g field.

We can detect the effects of the RV anhilations by integral and firmi.511kev and quarks anti quarks anhilations gammas bands in the galatic center.No process can predict this much amount of anti matter , which is predicted by this process.
Bayesian outlier detection in Capital Asset Pricing Model
Creators: name: De Giuli, Maria Elena
name: Maggi, Mario Alessandro
name: Tarantola, Claudia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: We propose a novel Bayesian optimisation procedure for outlier detection in the Capital Asset Pricing Model. We use a parametric product partition model to robustly estimate the systematic risk of an asset. We assume that the returns follow independent normal distributions and we impose a partition structure on the parameters of interest. The partition structure imposed on the parameters induces a corresponding clustering of the returns. We identify via an optimisation procedure the partition that best separates standard observations from the atypical ones. The methodology is illustrated with reference to a real data set, for which we also provide a microeconomic interpretation of the detected outliers.
Effect of adolescent female fertility and healthcare spending on maternal and neonatal mortality in low resource setting of South Asia
Creators: name: Roy, Shongkour
Publisher: name: figshare
Year: 2022
Subjects: subject: 140208 Health Economics
subject: FOS: Economics and business
subject: 140304 Panel Data Analysis
subject: 140302 Econometric and Statistical Methods

description: Background Maternal and neonatal mortality is high in South Asia. Recent studies have identified factors such as adolescent female fertility, healthcare spending is reducing maternal and neonatal mortality. The objective of this study is to examine the effect of adolescent female fertility and healthcare spending on maternal and neonatal mortality in South Asian countries. Methods A retrospective panel study design was used, a total of 8 South Asian countries (Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka) data from World development indicator 1990–2020 considered for analysis. Descriptive statistical method was used for summary. The effect of adolescent female fertility and healthcare spending on maternal and neonatal mortality were analysed using fixed and random effect regression with multiple imputation. Findings Adolescent female fertility, maternal, and neonatal mortality is very high in the aforementioned countries, and considerably varies among countries. A significant relationship between the maternal mortality and healthcare spending, neonatal mortality and adolescent female fertility was observed. We found neonatal and maternal mortality are more likely to decrease depends on healthcare spending. Healthcare spending has a significantly negative effect on neonatal mortality (− 0.182, 95% CI: [− 0.295 to −.069]; P-value < 0.01) and maternal mortality (− 0.169, 95% CI: [− 0.243 to − 0.028]; P-value < 0.05). A change in 1 % increases in healthcare spending should decrease by 0.182 neonatal mortality per 1000 live births and maternal mortality by 0.169 per 100,000 live births. Conclusions In south Asian countries, increasing healthcare spending and decreasing adolescent female fertility may contribute to reduce maternal and neonatal mortality. In addition, number of service providers such as physicians supplied contributed to the decline of neonatal mortality. These findings have important implications for future improvement of healthcare spending in maternal and neonatal health programs.
High Energy Emission from the Intrabinary Shocks in Redback Pulsars
Creators: name: Sullivan, Andrew G.
name: Romani, Roger W.
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The intrabinary shocks (IBS) of spider pulsars emit non-thermal synchrotron X-rays from accelerated electrons and positrons in the shocked pulsar wind, likely energized by magnetic reconnection. In redback spider pulsars, the IBS typically wraps around the pulsar, leading to a near-normal IBS shock with relatively bright X-ray emission. The characteristic energies of radiating particles and the magnetic fields in the IBS suggest spectral features in the hard X-ray band. Here we perform joint soft-hard X-ray analyses of three redback pulsars, J1723-2837, J2215+5135, and J2339-0533, including new J2215 NuSTAR data. We identify a significant cooling break in J1723-2837 and a marginal break in J2215+5135, while placing constraints on the break energy in J2339-0533. Interpreting these as synchrotron cooling features allows us to estimate the IBS magnetic field $B_{\rm IBS} \sim 40-100$ G and place lower bounds on the maximum radiating electron energy. Our results constrain the magnetization of the pulsar wind as well as pair-production in millisecond pulsar magnetospheres.
description: 6 pages, 3 figures, 2 tables; Accepted for publication in ApJ (Small typos corrected and DOI added)
Deconstructing urban utopias : the case of Bahria Town, Pakistan
Creators: name: Mysorewala, Raviya
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Development
Master planning
Global south
Modernity
World-class
Pakistan

description: This report outlines the rationalities behind planning practices in Pakistan using the case of Bahria Town. Studying themes used in the promotion and design of Bahria Town, this report argues that planning in Pakistan takes inspiration from cities of the Global North, resulting in mechanisms that are incompatible with Pakistan’s context. Such practices focus on aesthetics and adversely affect the urban majority of the country which is poor. The report details the implications that planning practices of Bahria Town, if unregulated and taken forward, can bear on the future of planning in Pakistan.
Surveying the Bright Stars by Optical Interferometry III: A Magnitude-Limited Multiplicity Survey of Classical Be-Stars
Creators: name: Hutter, D. J.
name: Tycner, C.
name: Zavala, R. T.
name: Benson, J. A.
name: Hummel, C. A.
name: Zirm, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of a multiplicity survey for a magnitude-limited sample of 31 classical Be stars conducted with the Navy Precision Optical Interferometer and the Mark III Stellar Interferometer. The interferometric observations were used to detect companions in ten previously known binary systems. For two of these sources (66 Oph and $β$ Cep) new orbital solutions were obtained, while for a third source ($\upsilon$ Sgr) our observations provide the first direct, visual detection of the hot sdO companion to the Be primary star. Combining our interferometric observations with an extensive literature search, we conclude that an additional four sources (o Cas, 15 Mon, $β$ Lyr, and $β$ Cep) also contain wider binary components that are physical companions to the narrow binaries, thus forming hierarchical multiple systems. Among the sources not previously confirmed as spectroscopic or visual binaries, BK Cam was resolved on a number of nights within a close physical proximity of another star with relative motion possibly suggesting a physical binary. Combining our interferometric observations with an extensive literature search, we provide a detailed listing of companions known around each star in the sample, and discuss the multiplicity frequency in the sample. We also discuss the prospects for future multiplicity studies of classical Be stars by long baseline optical interferometry.
description: 58 pages, 14 figures, 8 tables
Geodesically Complete Lorentzian Metrics on Some Homogeneous 3 Manifolds
Creators: name: Bromberg, Shirley
name: Medina, Alberto
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C22, 53C50, 57M50

description: In this work it is shown that a necessary condition for the completeness of the geodesics of left invariant pseudo-Riemannian metrics on Lie groups is also sufficient in the case of 3-dimensional unimodular Lie groups, and not sufficient for 3-dimensional non unimodular Lie groups. As a consequence it is possible to identify, amongst the compact locally homogeneous Lorentzian 3-manifolds with non compact (local) isotropy group, those that are geodesically complete.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Charge-memory effect in a polaron model: equation-of-motion method for Green functions
Creators: name: D'Amico, Pino
name: Ryndyk, Dmitry A.
name: Cuniberti, Gianaurelio
name: Richter, Klaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze a single-level quantum system placed between metallic leads and strongly coupled to a localized vibrational mode, which models a singlemolecule junction or an STM setup. We consider a polaron model describing the interaction between electronic and vibronic degrees of freedom and develop and examine different truncation schemes in the equation-of-motion method within the framework of non-equilibrium Green functions. We show that upon applying gate or bias voltage, it is possible to observe charge-bistability and hysteretic behavior which can be the basis of a charge-memory element. We further perform a systematic analysis of the bistability behaviour of the system for different internal parameters such as the electron-vibron and the lead-molecule coupling strength.
description: 12 pages, 5 figures
National Tuberculosis Association
Creators: name: Bertois, Rosemary
Publisher: name: University of Oregon
Year: 1932
Subjects: Tuberculosis

description: No occupation can be quite intelligently followed or correctly understood it it, at lease to some extent, illumined by a lightly touched upon historical background as it is interpreted from the human and social standpoint. In regard to the National Tuberculosis Association, I have found the following topics to be of the most significance: what the association is and its history, including outstanding persons and their contributive efforts, the scientific basis, the program, results of the program, organization, projects and services, administration, the business management, the medical division, publicity, personnel, publications, child health education, field services, and much more.
Macrogynoplax duida Stark 2011, sp. n.
Creators: name: Stark, Bill P.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Macrogynoplax
Macrogynoplax duida

description: Macrogynoplax duida sp. n. (Figs. 1-4) Material examined. Holotype ♂, Venezuela, Mt. Duida, November 1928, Ac. 29500, Tate No.? (AMNH). Paratype, same site, 29 November 1928, Ac. 29500, Tate No. 406, 1♀ (AMNH). Adult habitus. Biocellate, ocelli small and widely separated. General color pale, pattern obscured by specimen condition. Unpigmented ommatidia on inner margins of eyes absent or obscured by specimen condition. Male. Forewing length 14 mm. Abdominal apex damaged, paraprocts apparently lacking anteroapical spine; tergum 10 without sensilla basiconica patch, hammer small, circular in outline and apparently oriented horizontally on surface of sternum 9. Apical section of aedeagal tube narrow at base in dorsal aspect and gradually widened to base of subterminal hooks (Fig. 1); lateral margins of tube strongly sclerotized but mesal strip membranous; hooks asymmetrical, curved ventrad; left hook directed dextrally across venter of tube and right hook extending apically toward aedeagal tip (Fig. 3). Aedeagal section beyond bases of hooks bearing a pair of weakly sclerotized, dorsally curved fingerlike lobes and a dorsomesal sclerotized process consisting of a pair of longitudinally oriented blades and a terminal membranous lobe (Figs. 1-2). Female. Forewing length 15 mm. Abdominal segments 9 and 10 missing. Subgenital plate with subparallel sides and a curved, mesally notched apical margin (Fig. 4); plate covers an estimated 2/3 of sternum 9 (missing) and is almost as wide as sternum 8. Lateral bars not observed due to specimen condition. Larva. Unknown. Etymology. The species name, used as a noun in apposition, is based on the type locality. Diagnosis. The male aedeagus of this species is most similar to that of M. geijskesii Zwick (Stark & Zwick 1989) among known species, but in that species the aedeagal hooks are symmetrical and the section of the aedeagus distal to the hooks lacks dorsally curved finger-like lobes and a dorsomesal pair of longitudinally oriented blade-like structures. Males key to M. poranga Ribeiro-Ferreira & Froehlich (if the hammer orientation is on the horizontal surface of sternum 9) in the Froehlich (2003) key. However, that orientation is not certain due to specimen condition. The female subgenital plate appears indistinguishable from that of M. pulchra Ribeiro & Froehlich (Ribeiro & Rafael 2007).
description: Published as part of Stark, Bill P., 2011, Macrogynoplax Duida, A New Species Of Stonefly (Plecoptera: Perlidae) From Cerro Duida, Venezuela, pp. 86-88 in Illiesia 7 (7) on pages 86-87, DOI: 10.5281/zenodo.4760447
description: {"references": ["Stark, B. P. & P. Zwick. 1989. New species of", "Froehlich, C. G. 2003. Stoneflies (Plecoptera: Perlidae)", "Ribeiro, J. M. F. & J. A. Rafael. 2007. Description of one"]}
The Red Sequence Luminosity Function in Massive Intermediate Redshift Galaxy Clusters
Creators: name: Crawford, S. M.
name: Bershady, M. A
name: Hoessel, J. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We measure the rest-frame B-band luminosity function of red-sequence galaxies (RSLF) of five intermediate-redshift (0.5 < z < 0.9), high-mass (sigma > 950 km/s) clusters. Cluster galaxies are identified through photometric redshifts based on imaging in seven bands (five broad, and two narrow) using the WIYN 3.5m telescope. The luminosity functions are well-fit down to M_B^*+3 for all of the clusters out to a radius of R_200. For comparison, the luminosity functions for a sample of 59 low redshift clusters selected from the SDSS are measured as well. There is a brightening trend (M_B^* increases by 0.7 mags by z=0.75) with redshift comparable to what is seen in the field for similarly defined galaxies, although there is a hint that the cluster red-sequence brightening is more rapid in the past (z>0.5), and relatively shallow at more recent times. Contrary to other claims, we find little evidence for evolution of the faint end slope. Previous indications of evolution may be due to limitations in measurement technique, bias in the sample selection, and cluster to cluster variation. As seen in both the low and high redshift sample, a significant amount of variation in luminosity functions parameters alpha and M^* exists between individual clusters.
description: 40 pages, 14 figures, accepted for publication in the Astrophysical Journal
On the Cauchy problem for the debar operator
Creators: name: Brinkschulte, Judith
name: Hill, C. Denson
Publisher: name: arXiv
Year: 2008
Subjects: subject: Complex Variables (math.CV)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32F10, 32F32, 32W05

description: We present new results concerning the solvability, of lack thereof, in the Cauchy problem for the debar operator, with initial values assigned on a weakly pseudoconvex hypersurface, and provide illustrative examples.
description: This is the final version, which is appearing in Arkiv foer Mathematik
Friction and dilatancy in immersed granular matter
Creators: name: Divoux, Thibaut
name: Géminard, Jean-Christophe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The friction of a sliding plate on a thin immersed granular layer obeys Amonton-Coulomb law. We bring to the fore a large set of experimental results which indicate that, over a few decades of values, the effective dynamical friction-coefficient depends neither on the viscosity of the interstitial fluid nor on the size of beads in the sheared layer, which bears out the analogy with the solid-solid friction in a wide range of experimental parameters. We accurately determine the granular-layer dilatancy, which dependance on the grain size and slider velocity can be qualitatively accounted by considering the rheological behaviour of the whole slurry. However, additional results, obtained after modification of the grain surface by a chemical treatment, demonstrate that the theoretical description of the flow properties of granular matter, even immersed, requires the detailed properties of the grain surface to be taken into account.
description: 4 pages, 4 figures
Quantum magnetism of ferromagnetic spin dimers in $α$-KVOPO$_4$
Creators: name: Mukharjee, Prashanta K.
name: Somesh, K.
name: Ranjith, K. M.
name: Baenitz, M.
name: Skourski, Y.
name: Adroja, D. T.
name: Khalyavin, D.
name: Tsirlin, A. A.
name: Nath, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetism of the spin-$\frac12$ $α$-KVOPO$_4$ is studied by thermodynamic measurements, $^{31}$P nuclear magnetic resonance (NMR), neutron diffraction, and density-functional band-structure calculations. Ferromagnetic Curie-Weiss temperature of $θ_{\rm CW}\simeq 15.9$ K and the saturation field of $μ_0H_s\simeq 11.3$ T suggest the predominant ferromagnetic coupling augmented by a weaker antiferromagnetic exchange that leads to a short-range order below 5 K and the long-range antiferromagnetic order below $T_{\rm N}\simeq 2.7$ K in zero field. Magnetic structure with the propagation vector $\mathbf k=(0,\frac12,0)$ and the ordered magnetic moment of 0.58 $μ_B$ at 1.5 K exposes a non-trivial spin lattice where strong ferromagnetic dimers are coupled antiferromagnetically. The reduction in the ordered magnetic moment with respect to the classical value (1 $μ_{\rm B}$) indicates sizable quantum fluctuations in this setting, despite the predominance of ferromagnetic exchange. We interpret this tendency toward ferromagnetism as arising from the effective orbital order in the folded chains of the VO$_6$ octahedra.
description: 12 pages, 14 figures, 58 references
Mental hygiene, a challenge to public health nursing
Creators: name: Bell, Mary E.
Publisher: name: University of Oregon
Year: 1932
Subjects: Mental Health
Public Health Nursing
Psychological Well-Being
Mental Disorders

description: The Challenge to Public Health Nursing is to aid in the prevention of and the ability to deal with mental and nervous diseases. For too long have we been willing and desirous of thinking that physical and mental health were two separate and entirely different things that one must be stressed, while the other can be more or less ignored. Too long have we been willing to nurse a diseased organ and neglect the mental reaction created in that individual because of illness. Too long have we emphasized the physical and neglected the mental. In medicine, there is now the realization that these two phases of health, or of sickness, can no longer be separated--physical well-being is dependent on mental well-being and vice versa.
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Huisman, Dennis
name: Zaroliagis, Christos D.
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Design and analysis of algorithms
subject: Mathematics of computing → Discrete mathematics
subject: Mathematics of computing → Combinatorics
subject: Mathematics of computing → Mathematical optimization
subject: Mathematics of computing → Graph theory
subject: Applied computing → Transportation

description: Front Matter, Table of Contents, Preface, Conference Organization
description: OASIcs, Vol. 85, 20th Symposium on Algorithmic Approaches for Transportation Modelling, Optimization, and Systems (ATMOS 2020), pages 0:i-0:x
Tunneling dynamics in cosmological bounce models
Creators: name: Bojowald, Martin
name: Jones, Brenda
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quasiclassical methods are used to define dynamical tunneling times in models of quantum cosmological bounces. These methods provide relevant new information compared with the traditional treatment of quantum tunneling by means of tunneling probabilities. As shown here, the quantum dynamics in bounce models is not secure from reaching zero scale factor, re-opening the question of how the classical singularity may be avoided. Moreover, in the examples studied here, tunneling times remain small even for large barriers, highlighting the quantum instability of underlying bounce models.
description: 18 pages, 5 figures
Mathematical and numerical analysis for some nonlinear second-order ordinary differential equations of Duffing type
Creators: name: Kunimoto, Yusuke
name: Fukuda, Ikki
Publisher: name: arXiv
Year: 2025
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34D05, 65L12

description: In this paper, we consider the initial value problem for some nonlinear second-order ODEs of Duffing type. We study the large time behavior of the solutions to this problem, from both the perspectives of mathematical and numerical analysis. First, we derive the decay estimate of the solutions, by using the energy method. Moreover, we numerically investigate the large time behavior of the energy function related to this problem, by using a structure-preserving difference method.
description: 7 pages
Laser frequency combs for astronomical observations
Creators: name: Steinmetz, Tilo
name: Wilken, Tobias
name: Araujo-Hauck, Constanza
name: Holzwarth, Ronald
name: Hänsch, Theodor W.
name: Pasquini, Luca
name: Manescau, Antonio
name: D'Odorico, Sandro
name: Murphy, Michael T.
name: Kentischer, Thomas
name: Schmidt, Wolfgang
name: Udem, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require measurements of Doppler velocity drifts of about 1 centimeter per second per year, and astronomical spectrographs have not yet been calibrated to this tolerance. We demonstrate the first use of a laser frequency comb for wavelength calibration of an astronomical telescope. Even with a simple analysis, absolute calibration is achieved with an equivalent Doppler precision of approximately 9 meters per second at about 1.5 micrometers - beyond state-of-the-art accuracy. We show that tracking complex, time-varying systematic effects in the spectrograph and detector system is a particular advantage of laser frequency comb calibration. This technique promises an effective means for modeling and removal of such systematic effects to the accuracy required by future experiments to see direct evidence of the universe's putative acceleration.
description: Science, 5th September 2008. 18 pages, 7 figures (7 JPG files), including Supporting Online Material. Version with higher resolution figures available at http://astronomy.swin.edu.au/~mmurphy/pub.html
New Observations and a Possible Detection of Parameter Variations in the Transits of Gliese 436b
Creators: name: Coughlin, Jeffrey L.
name: Stringfellow, Guy S.
name: Becker, Andrew C.
name: Lopez-Morales, Mercedes
name: Mezzalira, Fabio
name: Krajci, Tom
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present ground-based observations of the transiting Neptune-mass planet Gl 436b obtained with the 3.5-meter telescope at Apache Point Observatory and other supporting telescopes. Included in this is an observed transit in early 2005, over two years before the earliest reported transit detection. We have compiled all available transit data to date and perform a uniform modeling using the JKTEBOP code. We do not detect any transit timing variations of amplitude greater than ~1 minute over the ~3.3 year baseline. We do however find possible evidence for a self-consistent trend of increasing orbital inclination, transit width, and transit depth, which supports the supposition that Gl 436b is being perturbed by another planet of < 12 Earth Masses in a non-resonant orbit.
description: 6 pages, 3 figures, 2 tables, Accepted to ApJ Letters
Counterpropagating Two-Soliton Solutions in the FPU Lattice
Creators: name: Hoffman, A.
name: Wayne, C. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37K40; 37K60;

description: We study the interaction of small amplitude, long wavelength solitary waves in the Fermi-Pasta-Ulam model with general nearest-neighbor interaction potential. We establish global-in-time existence and stability of counter-propagating solitary wave solutions. These solutions are close to the linear superposition of two solitary waves for large positive and negative values of time; for intemediate values of time these solutions describe the interaction of two counterpropagating pulses. These solutions are stable with respect to perturbations in $\ell^2$ and asymptotically stable with respect to perturbations which decay exponentially at spatial $\pm \infty$.}
description: 32 pages
title: Mehr als ein süßes Hobby: Stadtimkerei. Soziale und kulturelle Dimensionen urbaner Bienenhaltung
title: More than a sweet hobby: Urban Beekeeping. Social and cultural dimensions of urban beekeeping.
titleType: AlternativeTitle
Creators: name: Gruber, Martin
Publisher: name: Universität Bremen
Year: 2021
Subjects: subject: Bienen
subject: Imkerei
subject: Hamburg
subject: Urban Beekeeping
subject: Stadtimkerei
subject: Apis mellifera
subject: Bienenhaltung
subject: 300

description: Qualitative und quantitative Untersuchung zur Bienenhaltung in Hamburg. Online-Befragung von Hamburger Imker*innen zu soziodemografischen Informationen, sowie Wissen zu Präferenzen, Einstellungen und Motivationen der Imker*innen.
Supernova and neutron-star limits on large extra dimensions reexamined
Creators: name: Hannestad, S.
name: Raffelt, G. G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In theories with large extra dimensions, supernova (SN) cores are powerful sources of Kaluza-Klein (KK) gravitons. A large fraction of these massive particles are gravitationally retained by the newly born neutron star (NS). The subsequent slow KK decays produce potentially observable gamma rays and heat the NS. We here show that the back-absorption of the gravitationally trapped KK gravitons does not significantly change our previous limits. We calculate the graviton emission rate in a nuclear medium by combining the low-energy classical bremsstrahlung rate with detailed-balancing arguments. This approach reproduces the previous thermal emission rate, but it is much simpler and allows for a calculation of the absorption rate by a trivial phase-space transformation. We derive systematically the dependence of the SN and NS limits on the number of extra dimensions.
description: Corrections of major numerical errors, notably in our neutron-star heating constraint, but also in papers by other authors
XMM-Newton View of the Multi-Phase Warm Absorber in Seyfert 1 Galaxy NGC985
Creators: name: Krongold, Yair
name: Jimenez-Bailon, Elena
name: Santos-Lleo, Maria
name: Nicastro, Fabrizio
name: Elvis, Martin
name: Brickhouse, Nancy
name: Andrade-Velazquez, Mercedes
name: Binette, Luc
name: Mathur, Smita
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of an XMM-Newton observation of the Seyfert 1 Galaxy NGC 985. The EPIC spectra present strong residuals to a single power-law model, indicating the presence of ionized absorbing gas and a soft excess. A broad-band fit to the EPIC and RGS spectra shows that the continuum can be well fit with a power-law and a blackbody component. The RGS can be modeled either with two or three absorption components. In the two absorber model the low-ionization one, accounts for the presence of the Fe M-shell unresolved transition array (Fe VII-XIII), and the high ionization component is required by the presence of several Fe L-shell transitions. The data suggest the presence of a third ionized component with higher ionization, so that the Fe L-shell absorption features are produced by two different components (one producing absorption by Fe XVII-XX, and the other absorption by Fe XX-XXII). However, the presence of the third absorbing component cannot be detected by means of an isolated absorption line in a significant way, so we consider this detection only as tentative. Interestingly, all ionization components have similar kinematics. In addition, whether two or three absorbers are considered, the components appear to be in pressure balance. These results give further support to the idea that warm absorbers in AGN consist of a two or three-phase medium. We note that, while in the model with only two absorbers one of them (the high ionization component) lies on an unstable branch of the thermal equilibrium curve, in the model with three absorbers all of the components lie on stable branches of the curve. This gives further plausibility to a multi-phase absorber.
description: Acepted for publication in ApJ
A Science Gateway for climate data analysis based on Virtual Analysis Ready Data
Creators: name: Cimadevilla, Ezequiel
Publisher: name: Zenodo
Year: 2024
Subjects: esgf
analysis ready data
climate
netcdf
science gateway

description: The Earth System Grid Federation (ESGF) Virtual Aggregation aims to enhance the accessibility and facilitate climate data analysis of datasets housed within the ESGF, a globally distributed network of research centres collaborating as a federated data archive. The ESGF provides modelling groups with nodes for publishing and archiving their model outputs to make them accessible to the climate community at any time. The federation has been chosen as a platform for dissemination of climate data of international initiatives such as CMIP and CORDEX. Thus, the ESGF has become the reference archive for Assessment Reports (AR) on Climate Change produced by the Intergovernmental Panel on Climate Change (IPCC). However, use cases in scientific research often involve calculations on datasets spanning multiple variables, over the whole time period and multiple model ensembles.The ESGF Virtual Aggregation extends the federation capabilities, beyond file search and download, by providing out of the box remote climate data analysis capabilities over data analysis ready, virtually aggregated, climate datasets, on top of the existing software stack of the federation. In contrast to other new methodologies based on the creation of Analysis Ready Data (ARD) and physical duplication of the datasets of the ESGF, this work presents a methodology based on logical and virtual aggregations that does not require duplication of the data. Moreover, this work exploits all the existing data services already available in the federation. Thus, climate analysis ready data is provided in a much more sustainable way.The ESGF Virtual Aggregation is provided both as a dataset and as a science gateway for users interested in climate data analysis. This work describes the methodology, implementation and features of the ESGF Virtual Aggregation. Also, a comparison between additional methods for the generation of climate analysis ready data within the context of the ESGF is provided. The trade-offs of the different approaches are considered and a comparison of climate data analysis use cases will be presented.
CRISP Spectropolarimetric Imaging of Penumbral Fine Structure
Creators: name: Scharmer, G. B.
name: Narayan, G.
name: Hillberg, T.
name: Rodriguez, J. de la Cruz
name: Lofdahl, M. G.
name: Kiselman, D.
name: Sutterlin, P.
name: van Noort, M.
name: Lagg, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss penumbral fine structure in a small part of a pore, observed with the CRISP imaging spectropolarimeter at the Swedish 1-m Solar Telescope (SST), close to its diffraction limit of 0.16 arcsec. Milne-Eddington inversions applied to these Stokes data reveal large variations of field strength and inclination angle over dark-cored penumbral intrusions and a dark-cored light bridge. The mid-outer part of this penumbra structure shows 0.3 arcsec wide spines, separated by 1.6 arcsec (1200 km) and associated with 30 deg inclination variations. Between these spines, there are no small-scale magnetic structures that easily can be be identified with individual flux tubes. A structure with nearly 10 deg more vertical and weaker magnetic field is seen midways between two spines. This structure is co-spatial with the brightest penumbral filament, possibly indicating the location of a convective upflow from below.
description: Accepted for publication in ApJL 17 Oct 2008. One Figure added
Correlations in Entangled States
Creators: name: Sanctuary, B. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entangled EPR spin pairs can be treated using the statistical ensemble interpretation of quantum mechanics. As such the singlet state results from an ensemble of spin pairs each with its own specific axis of quantization. This axis acts like a quantum mechanical hidden variable. If the spins lose coherence they disentangle into a mixed state that contains classical correlations. In this paper an infinitesimal phase decoherence is introduced to the singlet state in order to reveal more clearly some of the correlations. It is shown that a singlet state has no classical correlations.
description: Paper is old, out of date, has some errors and has been replaced by arXiv:2503.22761v1