cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficiency of Terrestrial Laser Scanning in Survey Works: Assessment, Modelling, and Monitoring
Creators: name: Kurdi, Fayez Tarsha
name: Reed, Paul
name: Gharineiat, Zahra
name: Awrangjeb, Mohammad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: (Secondary)

description: Nowadays, static, mobile, terrestrial, and airborne laser scanning technologies have become familiar data sources for engineering work, especially in the area of land surveying. The diversity of Light Detection and Ranging (LiDAR) data applications thanks to the accuracy and the high point density in addition to the 3D data processing high speed allow laser scanning to occupy an advanced position among other spatial data acquisition technologies. Moreover, the unmanned aerial vehicle drives the airborne scanning progress by solving the flying complexity issues. However, before the employment of the laser scanning technique, it is unavoidable to assess the accuracy of the scanner being used under different circumstances. The key to success is determined by the correct selection of suitable scanning tools for the project. In this paper, the terrestrial LiDAR data is tested and used for several laser scanning projects having diverse goals and typology, e.g., road deformation monitoring, building facade modelling, road modelling, and stockpile modelling and volume measuring. The accuracy of direct measurement on the LiDAR point cloud is estimated as 4mm which may open the door widely for LiDAR data to play an essential role in survey work applications.
description: 8 pages, 6 figures
The Expanded Very Large Array -- a New Telescope for New Science
Creators: name: Perley, R. A.
name: Chandler, C. J.
name: Butler, B. J.
name: Wrobel, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Since its commissioning in 1980, the Very Large Array (VLA) has consistently demonstrated its scientific productivity. However, its fundamental capabilities have changed little since 1980, particularly in the key areas of sensitivity, frequency coverage, and velocity resolution. These limitations have been addressed by a major upgrade of the array, which began in 2001 and will be completed at the end of 2012. When completed, the Expanded VLA -- the EVLA -- will provide complete frequency coverage from 1 to 50 GHz, a continuum sensitivity of typically 1 microJy/beam (in 9 hours with full bandwidth), and a modern correlator with vastly greater capabilities and flexibility than the VLA's. In this paper we describe the goals of the EVLA project, its current status, and the anticipated expansion of capabilities over the next few years. User access to the array through the OSRO and RSRO programs is described. The following papers in this special issue, derived from observations in its early science period, demonstrate the astonishing breadth of this most flexible and powerful general-purpose telescope.
description: 6 pages; 2 figures; emulateapj.cls; to appear in the ApJL EVLA special issue
Symmetries of the finite Heisenberg group for composite systems
Creators: name: Korbelar, M.
name: Tolar, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Symmetries of the finite Heisenberg group represent an important tool for the study of deeper structure of finite-dimensional quantum mechanics. As is well known, these symmetries are properly expressed in terms of certain normalizer. This paper extends previous investigations to composite quantum systems consisting of two subsystems - qudits - with arbitrary dimensions n and m. In this paper we present detailed descriptions - in the group of inner automorphisms of GL(nm,C) - of the normalizer of the Abelian subgroup generated by tensor products of generalized Pauli matrices of orders n and m. The symmetry group is then given by the quotient group of the normalizer.
description: Submitted to J. Phys. A: Math. Theor
Vortex clusters and multiquanta flux lattices in thin films of anisotropic superconductors
Creators: name: Samokhvalov, A. V.
name: Savinov, D. A.
name: Mel'nikov, A. S.
name: Buzdin, A. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The distinctive features of equilibrium vortex structures in thin films of anisotropic superconductors in tilted magnetic fields are studied for the limits of moderate and strong anisotropy. The energetically favorable shape of isolated vortex lines is found in the framework of two particular models describing these limiting cases: London theory with an anisotropic mass tensor and London-type model for a stack of Josephson--decoupled superconducting layers. The increase of the field tilting is shown to result in qualitative changes in the vortex--vortex interaction potential: the balance between long--range attractive and repulsive forces occurs to be responsible for a formation of a minimum of the interaction potential vs the intervortex distance. This minimum appears to exist only for a certain restricted range of the vortex tilting angles which shrinks with the decrease of the system anisotropy parameter. Tilted vortices with such unusual interaction potential form clusters with the size depending on the field tilting angle and film thickness or/and can arrange into multiquanta flux lattice. The magnetic flux through the unit cells of the corresponding flux line lattices equals to an integer number $M$ of flux quanta. Thus, the increase in the field tilting should be accompanied by the series of the phase transitions between the vortex lattices with different $M$.
description: 34 pages, 12 figures, In Press at Phys. Rev. B
A Bayesian parameter estimation approach to pulsar time-of-arrival analysis
Creators: name: Messenger, C.
name: Lommen, A.
name: Demorest, P.
name: Ransom, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The increasing sensitivities of pulsar timing arrays to ultra-low frequency (nHz) gravitational waves promises to achieve direct gravitational wave detection within the next 5-10 years. While there are many parallel efforts being made in the improvement of telescope sensitivity, the detection of stable millisecond pulsars and the improvement of the timing software, there are reasons to believe that the methods used to accurately determine the time-of-arrival (TOA) of pulses from radio pulsars can be improved upon. More specifically, the determination of the uncertainties on these TOAs, which strongly affect the ability to detect GWs through pulsar timing, may be unreliable. We propose two Bayesian methods for the generation of pulsar TOAs starting from pulsar "search-mode" data and pre-folded data. These methods are applied to simulated toy-model examples and in this initial work we focus on the issue of uncertainties in the folding period. The final results of our analysis are expressed in the form of posterior probability distributions on the signal parameters (including the TOA) from a single observation.
description: 16 pages, 4 figures
Generalized monodromy method in gauge/gravity duality
Creators: name: Hou, Yuanpeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The method of monodromy is an important tool for computing Virasoro conformal blocks in a two-dimensional Conformal Field Theory (2d CFT) at large central charge and external dimensions. In deriving the form of the monodromy problem, which defines the method, one needs to insert a degenerate operator, usually a level-two operator, into the corresponding correlation function. It can be observed that the choice of which degenerate operator to insert is arbitrary, and they shall reveal the same physical principles underlying the method. In this paper, we exploit this freedom and generalize the method of monodromy by inserting higher-level degenerate operators. We illustrate the case with a level-three operator, and derive the corresponding form of the monodromy problem. We solve the monodromy problem perturbatively and numerically; and check that it agrees with the standard monodromy method, despite the fact that the two versions of the monodromy problem do not seem to be related in any obvious way. The forms corresponding to other higher-level degenerate operators are also discussed. We explain the physical origin of the coincidence and discuss its implication from a mathematical perspective.
On the magnitude difference between the main sequence turn off and the red giant branch bump in Galactic globular clusters
Creators: name: Cassisi, Santi
name: Marin-Franch, Antonio
name: Salaris, Maurizio
name: Aparicio, Antonio
name: Monelli, Matteo
name: Pietrinferni, Adriano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new measurements of the magnitude of the main sequence turn off and the red giant branch bump in the luminosity function of a sample of Galactic globular clusters with updated estimates of [Fe/H] and [$α$/Fe], employing photometric data collected with the Advanced Camera for Survey on board the HST. We compare measured and predicted values of the magnitude difference between these two features, a rarely employed diagnostic of the internal structure of low-mass stars at the beginning of their red giant evolution. Our analysis discloses a clear discrepancy between theory and observations, the theoretical red giant branch bump magnitudes being too bright by on average $\sim0.2$~mag. This corroborates results from the more widely studied magnitude difference between horizontal branch and red giant bump, avoiding the well known problems associated to the determination of the horizontal branch level from colour magnitude diagrams, and to uncertainties in the luminosity of horizontal branch stellar models. We briefly discuss several potential solutions of this discrepancy.
description: 6 pages, 4 figures, Astronomy & Astrophysics, in press
Mathematical and Numerical Studies on Meshless Methods for Exterior Unbounded Domain Problems
Creators: name: Shigeta, Takemi
name: Young, D. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The method of fundamental solution (MFS) is an efficient meshless method for solving a boundary value problem in an exterior unbounded domain. The numerical solution obtained by the MFS is accurate, while the corresponding matrix equation is ill-conditioned. A modified MFS (MMFS) with the proper basis functions is proposed by the introduction of the modified Trefftz method (MTM). The concrete expressions of the corresponding condition numbers and the solvability by these methods are mathematically proven. Thereby, the optimal parameter minimizing the condition number is also mathematically given. Numerical experiments show that the condition numbers of the matrices corresponding to the MTM and the MMFS are reduced and that the numerical solution by the MMFS is more accurate than the one by the conventional method.
description: 25 pages, 11 figures
Hair in the Back of a Throat: Non-Supersymmetric Multi-Center Solutions from Kähler Manifolds
Creators: name: Bobev, Nikolay
name: Niehoff, Ben
name: Warner, Nicholas P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We find a class of non-supersymmetric multi-center solutions of the STU model of five-dimensional ungauged supergravity. The solutions are determined by a system of linear equations defined on a four-dimensional Kähler manifold with vanishing Ricci scalar and a U(1) isometry. The most general class of such Kähler manifolds was studied by LeBrun and they have non-trivial 2-cycles that can support the topological fluxes characteristic of bubbled geometries. After imposing an additional U(1) symmetry on the base we find explicit multi-center supergravity solutions. We show that there is an infinite number of regular multi-center solutions with non-trivial topology that are asymptotic to the near-horizon limit of a BMPV black hole.
description: 34 pages, 1 figure
Modeling ordinal data for recommendation system
Creators: name: Srivastava, Anupam
Publisher: name: University of British Columbia
Year: 2014

description: In this work we investigate the problem of making personalized recommendations by creating models for predicting user-item rating, such as in movie recommendations. The study is based on the Movielens data set which has ratings on an ordinal scale. In the past, partly due to motivation gained by the Netflix challenge, researchers have constructed models that make point predictions to minimize the root mean square error (RMSE) on test sets, typically by learning latent user and movie feature structure. In such models, the difference between ratings of 2 and 3 stars is the same as the difference between ratings of 4 and 5 stars, etc., which is a strong prior assumption. We construct probabilistic models which also learn latent user and movie feature structure but do not make this assumption. These models interpret the ratings as categories (nominal and ordinal) and return a probability distribution over the ratings for each user-movie pair instead of making a point prediction. We evaluate and compare our models with other models for making personalized recommendations for the top-n task and comparing the precision vs recall, receiver operating characteristic and cost curves. Our results show that our ordinal data model performs better than a nominal data model, a state-of-the-art point prediction model, and other baselines.
On the bi-Hamiltonian structure of Bogoyavlensky system on $so(4)$
Creators: name: Vershilov, A. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We discuss bi-Hamiltonian structure for the Bogoyavlensky system on $so(4)$ with an additional integral of fourth order in momenta. An explicit procedure to find the variables of separation and the separation relations is considered in detail.
Additional file 1 of Identification, characterization and expression profiles of E2 and E3 gene superfamilies during the development of tetrasporophytes in Gracilariopsis lemaneiformis (Rhodophyta)
Creators: name: Wu, Qiong
name: Yin, Jingru
name: Jiang, Min
name: Zhang, Jingyu
name: Sui, Zhenghong
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: Additional file 1: Supplementary Fig. S1. PCR amplification products of 13 E2 genes of wild type of Gp. lemaneiformis. M: marker. Number 1-13 indicated different E2 ubiquitin activating enzyme genes, and the left were DNA sequences, and the right were cDNA sequences.
Maurillus Smith 1855
Creators: name: Shimizu, Akira
name: Pitts, James P
name: Rodriguez, Juanita
name: Wahis, Raymond
name: Yoshimura, Jin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Pompilidae
Maurillus

description: Key to the species of Maurillus Smith Females 1 Head wholly black, as high as wide (Fig. 1a); MID 0.6× TFD; flagellomere1 0.6× UID; and distance from eye top to vertex crest, in profile, about two-fifths of eyeheight (Fig. 1c) …...................................................... M. argenticapitis sp. nov. 2 Head dark ferruginous above ocelli, higher than wide (Fig. 2a); frons very broad, MID 0.7× TFD; flagellomere1 0.5× UID; and distance fromeye top to vertex crest, in profile, abouttwo-thirdsof eyeheight (Fig. 2c). M. australis Smith
description: Published as part of Shimizu, Akira, Pitts, James P, Rodriguez, Juanita, Wahis, Raymond & Yoshimura, Jin, 2021, Systematics and convergent evolution in three Australian genera of Pepsinae spider wasps (Hymenoptera: Pompilidae), pp. 301-316 in Austral Entomology 60 (2) on page 7, DOI: 10.1111/aen.12530, http://zenodo.org/record/4627871
Evidence for Pre-Existing Dust in the Bright Type IIn SN 2010jl
Creators: name: Andrews, J. E.
name: Clayton, Geoffrey C.
name: Wesson, R.
name: Sugerman, B. E. K.
name: Barlow, M. J.
name: Clem, J.
name: Ercolano, B.
name: Fabbri, J.
name: Gallagher, J. S.
name: Landolt, A.
name: Meixner, M.
name: Otsuka, M.
name: Riebel, D.
name: Welch, D. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: SN 2010jl was an extremely bright, Type IIn SNe which showed a significant IR excess no later than 90 days after explosion. We have obtained Spitzer 3.6 and 4.5 \mum and JHK observations of SN 2010jl \sim90 days post explosion. Little to no reddening in the host galaxy indicated that the circumstellar material lost from the progenitor must lie in a torus inclined out of the plane of the sky. The likely cause of the high mid-IR flux is the reprocessing of the initial flash of the SN by pre-existing circumstellar dust. Using a 3D Monte Carlo Radiative Transfer code, we have estimated that between 0.03-0.35 Msun of dust exists in a circumstellar torus around the SN located 6 \times 10 ^17 cm away from the SN and inclined between 60-80\cdot to the plane of the sky. On day 90, we are only seeing the illumination of approximately 5% of this torus, and expect to see an elevated IR flux from this material up until day \sim 450. It is likely this dust was created in an LBV-like mass loss event of more than 3 Msun, which is large but consistent with other LBV progenitors such as η Carinae.
description: Accepted in AJ
Periodic boundary conditions and $G_2$ cosmology
Creators: name: Coley, Alan
name: Lim, Woei Chet
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the standard concordance cosmology the spatial curvature is assumed to be constant and zero (or at least very small). In particular, in numerical computations of the structure of the universe using N-body simulations, exact periodic boundary conditions are assumed which constrains the spatial curvature. In order to confirm this qualitatively, we numerically evolve a special class of spatially inhomogeneous $G_2$ models with both periodic initial data and non periodic initial data using zooming techniques. We consequently demonstrate that in these models periodic initial conditions do indeed suppress the growth of the spatial curvature as the models evolve away from their initial isotropic and spatially homogeneous state, thereby verifying that the spatial curvature is necessarily very small in standard cosmology.
description: 10 pages, 3 figures. Matches published version
Ballistic nanofriction
Creators: name: Guerra, Roberto
name: Tartaglino, Ugo
name: Vanossi, Andrea
name: Tosatti, Erio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Sliding parts in nanosystems such as Nano ElectroMechanical Systems (NEMS) and nanomotors, increasingly involve large speeds, and rotations as well as translations of the moving surfaces; yet, the physics of high speed nanoscale friction is so far unexplored. Here, by simulating the motion of drifting and of kicked Au clusters on graphite - a workhorse system of experimental relevance -- we demonstrate and characterize a novel "ballistic" friction regime at high speed, separate from drift at low speed. The temperature dependence of the cluster slip distance and time, measuring friction, is opposite in these two regimes, consistent with theory. Crucial to both regimes is the interplay of rotations and translations, shown to be correlated in slow drift but anticorrelated in fast sliding. Despite these differences, we find the velocity dependence of ballistic friction to be, like drift, viscous.
Über den Einfluss der Fußgeometrie auf die Energieeffizienz beim zweibeinigen Gehen
Creators: name: Römer, Ulrich Johannes
Publisher: name: KIT Scientific Publishing
Year: 2019
Subjects: Gehen
Robotik
Biomechanik
Regelung
Optimierung
walking
robotics
biomechanics
control
optimization

description: Der Einfluss der Fußgeometrie auf die Energieeffizienz beim zweibeinigen Gehen wird untersucht. Es wird eine Methode zur Optimierung der Fußgeometrie für einen zweibeinigen Roboter entwickelt. Grundlage ist ein ebenes Modell mit beliebieger, konvexer Fußgeometrie in Kombination mit einer Regelung auf Basis der hybriden Nulldynamik. Es werden optimale Bewegungen und Fußgeometrien ermittelt. Im Vergleich zu einem Modell mit Punktfüßen ergeben sich Energieeinsparungen von über 80%.
Reply to "Comment on 'Falsification Of The Atmospheric CO2 Greenhouse Effects Within The Frame Of Physics' by Joshua B. Halpern, Christopher M. Colose, Chris Ho-Stuart, Joel D. Shore, Arthur P. Smith, Jörg Zimmermann"
Creators: name: Gerlich, Gerhard
name: Tscheuschner, Ralf D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: It is shown that the notorious claim by Halpern et al. recently repeated in their comment that the method, logic, and conclusions of our "Falsification Of The CO2 Greenhouse Effects Within The Frame Of Physics" would be in error has no foundation. Since Halpern et al. communicate our arguments incorrectly, their comment is scientifcally vacuous. In particular, it is not true that we are "trying to apply the Clausius statement of the Second Law of Thermodynamics to only one side of a heat transfer process rather than the entire process" and that we are "systematically ignoring most non-radiative heat flows applicable to Earth's surface and atmosphere". Rather, our falsification paper discusses the violation of fundamental physical and mathematical principles in 14 examples of common pseudo-derivations of fictitious greenhouse effects that are all based on simplistic pictures of radiative transfer and their obscure relation to thermodynamics, including but not limited to those descriptions (a) that define a "Perpetuum Mobile Of The 2nd Kind", (b) that rely on incorrectly calculated averages of global temperatures, (c) that refer to incorrectly normalized spectra of electromagnetic radiation. Halpern et al. completely missed an exceptional chance to formulate a scientifically well-founded antithesis. They do not even define a greenhouse effect that they wish to defend. We take the opportunity to clarify some misunderstandings, which are communicated in the current discussion on the non-measurable, i.e. physically non-existing influence of the trace gas CO2 on the climates of the Earth.
description: 41 pages, 9 figures
Comparison of different models of non-local impact ionization for low noise avalanche photodiodes
Creators: name: Marsland, John Stephen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The dead space model of non-local impact ionization has been developed independently by three different research groups in order to include a 'soft' dead space. This paper seeks to compare these models for the first time. The models are fitted to Monte Carlo simulation data and it is found that there are no significant differences between the models except that the Liverpool model cannot be used to fit one data set which has a very soft dead space. Likewise the models give very similar results when used to calculate the excess noise factor for low noise avalanche photodiodes.
description: 4 pages, 6 figures, accepted for publication in Physica Status Solidi, conference ICOOPMA 2010
Using a low-copy nuclear gene (phosphoglycerate kinase; PGK) to explore the phylogeny of the aquatic plant family Hydatellaceae (Nymphaeales)
Creators: name: Lin, Qianshi
Publisher: name: University of British Columbia
Year: 2014

description: Hydatellaceae are a small aquatic family of 12 species related to water lilies, part of the ANITA grade of angiosperms. Our current understanding of phylogenetic relationships in the family comes from several plastid genes and nuclear ITS data. These data sets are generally highly congruent, and lend support to the monophyly of multiple species. However, the published nuclear ITS tree was unrooted (outgroups were too distant to align), and there were several minor phylogenetic conflicts between plastid and ITS gene trees for three closely related species, Trithuria bibracteata, T. occidentalis, and T. submersa; two of these species were also not reciprocally monophyletic in individual gene trees. The position of T. occidentalis was also based on very limited plastid data, and there was no molecular evidence to link staminate and pistillate individuals in this species. To further clarify phylogenetic relationships and species boundaries, I recovered two copies of nuclear-encoded phosphoglycerate kinase (PGK) gene from taxa in Hydatellaceae and several water lilies. I reconstructed the history of the PGK duplication in angiosperms as a whole. I also added plastid data from additional populations of several species, and estimated the dated species tree using a Bayesian multispecies coalescent approach to reconcile different gene trees. The angiosperm-level PGK gene tree indicated that the duplication of PGK gene may have happened around the origin of angiosperms. The root of Hydatellaceae implied by concatenated nuclear PGK matches that inferred from plastid data. Trithuria occidentalis is clearly placed in sect. Trithuria, and staminate and pistillate individuals of this species are linked together using new evidence from the plastid and PGK genes. Phylogenetic relationships inferred using each PGK copy are consistent with the sectional relationships inferred using plastid and ITS data, with less sharply defined species boundaries. I also explore the possibility here that some of the incongruence that I observed between individual genes trees and in inferred species trees is a consequence of additional minor gene duplications or polyploidization/introgression events.
Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance
Creators: name: Kostylev, M.
name: Stashkevich, A. A.
name: Adeyeye, A. O.
name: Shakespeare, C.
name: Kostylev, N.
name: Ross, N.
name: Kennewell, K.
name: Magaraggia, R.
name: Roussigné, Y.
name: Stamps, R. L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The broadband microstrip ferromagnetic resonance technique has been applied for detection and characterization of a magnetic inhomogeneity in a film sample. In the case of a 100nm thick Permalloy film an additional magnetically depleted top sub-layer, practically unidentifiable by the conventional ferromagnetic resonance setup, has been detected and characterized. These results have been confirmed by Brillouin light scattering spectroscopy revealing the fact that the optical properties of the additional sub-layer do not differ much from those of the bulk of the film. Subsequent characterization of a large number of other presumably single-layer films with thicknesses in the range 30-100nm using the same ferromagnetic resonance technique also revealed the same effect.
Вестник Российского нового университета серия «Человек и общество», Выпуск 12019
Creators: name: Автономная некоммерческая организация высшего образования «Российский новый университет»
Publisher: name: Вестник Российского нового университета серия «Человек и общество»
Year: 2019

description: , Выпуск 12019
Evidence for reproductive interference between sexual and apomictic populations of the Easter Daisy (Townsendia hookeri, Asteraceae)
Creators: name: Garani, Alice
Publisher: name: University of British Columbia
Year: 2014

description: Townsendia hookeri (Asteraceae) plants can reproduce sexually or via apomixis (i.e. asexual reproduction through seeds), and the breeding system is tightly linked with ploidy level, so that sexual outcrossers are exclusively diploid while apomictic plants are polyploid. The species grows from central Colorado to British Columbia, with a disjunct distribution in Yukon Territory. Outside Yukon, sexual populations are restricted to the southernmost portion of the range (Colorado and southern Wyoming) and apomictic populations occur from Wyoming to Canada, a pattern consistent with geographical parthenogenesis. The major objective of this study was to expand our understanding of the factors that have shaped and maintain this distribution, conferring an apparent advantage to apomictic lineages over their sexual progenitors. Having documented that polyploid plants retain the ability to produce some functional pollen, I hypothesized that if sexual forms spread into an apomictic population, and thus receive mostly heterospecific pollen, they would have reduced reproductive success, because the progeny sired in sexual-asexual crosses are predicted to be weak or inviable, and to include hybrid apomicts. This asymmetric reproductive interference could help explain why diploids have failed to spread into the territory dominated by apomicts. To test this hypothesis I performed a cross-pollination experiment in the field. I showed that diploid and polyploid cytotypes have comparable reproductive success (at least, in the area where the experiment was conducted), and I also confirmed that diploids are outcrossers while polyploids are apomictic. The crossing experiment indicates that, despite its low viability, pollen produced by apomicts can fertilize and negatively affect diploid seed parents. As predicted, when sexual plants received heterospecific rather than conspecific pollen, seed set and germination rate were reduced, and seedlings had a lower survival rate. Flow cytometric analysis of offspring from sexual-asexual crosses revealed the presence of putative euploid (diploid, triploid and tetraploid) as well as aneuploid cytotypes. Based on ploidy level it is reasonable to expect that polyploid hybrids inherited apomictic genes and that at least some of them might be fully apomictic.
On the Formation of CO2 and Other Interstellar Ices
Creators: name: Garrod, Robin T.
name: Pauly, Tyler
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the formation and evolution of interstellar dust-grain ices under dark-cloud conditions, with a particular emphasis on CO2. We use a three-phase model (gas/surface/mantle) to simulate the coupled gas--grain chemistry, allowing the distinction of the chemically-active surface from the ice layers preserved in the mantle beneath. The model includes a treatment of the competition between barrier-mediated surface reactions and thermal-hopping processes. The results show excellent agreement with the observed behavior of CO2, CO and water ice in the interstellar medium. The reaction of the OH radical with CO is found to be efficient enough to account for CO2 ice production in dark clouds. At low visual extinctions, with dust temperatures ~12 K, CO2 is formed by direct diffusion and reaction of CO with OH; we associate the resultant CO2-rich ice with the observational polar CO2 signature. CH4 ice is well correlated with this component. At higher extinctions, with lower dust temperatures, CO is relatively immobile and thus abundant; however, the reaction of H and O atop a CO molecule allows OH and CO to meet rapidly enough to produce a CO:CO2 ratio in the range ~2--4, which we associate with apolar signatures. We suggest that the observational apolar CO2/CO ice signatures in dark clouds result from a strongly segregated CO:H2O ice, in which CO2 resides almost exclusively within the CO component. Observed visual-extinction thresholds for CO2, CO and H2O are well reproduced by depth-dependent models. Methanol formation is found to be strongly sensitive to dynamical timescales and dust temperatures.
description: 22 pages, 12 figures
Securing Data Platforms: Strategic Masking Techniques for Privacy and Security for B2B Enterprise Data
Creators: name: Khoje, Mandar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In today's digital age, the imperative to protect data privacy and security is a paramount concern, especially for business-to-business (B2B) enterprises that handle sensitive information. These enterprises are increasingly constructing data platforms, which are integrated suites of technology solutions architected for the efficient management, processing, storage, and data analysis. It has become critical to design these data platforms with mechanisms that inherently support data privacy and security, particularly as they encounter the added complexity of safeguarding unstructured data types such as log files and text documents. Within this context, data masking stands out as a vital feature of data platform architecture. It proactively conceals sensitive elements, ensuring data privacy while preserving the information's value for business operations and analytics. This protective measure entails a strategic two-fold process: firstly, accurately pinpointing the sensitive data that necessitates concealment, and secondly, applying sophisticated methods to disguise that data effectively within the data platform infrastructure. This research delves into the nuances of embedding advanced data masking techniques within the very fabric of data platforms and an in-depth exploration of how enterprises can adopt a comprehensive approach toward effective data masking implementation by exploring different identification and anonymization techniques.
Density Profiles in Open Superdiffusive Systems
Creators: name: Lepri, Stefano
name: Politi, Antonio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We numerically solve a discretized model of Levy random walks on a finite one-dimensional domain in the presence of sources and with a reflection coefficient $r$. At the domain boundaries, the steady-state density profile is non-analytic. The meniscus exponent $μ$, introduced to characterize this singular behavior, uniquely identifies the whole profile. Numerical data suggest that $μ=α/2 + r(α/2-1)$, where $α$ is the Levy exponent of the step-length distribution. As an application, we show that this model reproduces the temperature profiles obtained for a chain of oscillators displaying anomalous heat conduction. Remarkably, the case of free-boundary conditions in the chain correspond to a Levy walk with negative reflection coefficient.
Additional file 2 of Identification, characterization and expression profiles of E2 and E3 gene superfamilies during the development of tetrasporophytes in Gracilariopsis lemaneiformis (Rhodophyta)
Creators: name: Wu, Qiong
name: Yin, Jingru
name: Jiang, Min
name: Zhang, Jingyu
name: Sui, Zhenghong
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: Additional file 2: Supplementary Fig. S2. PCR amplification products of 48 E3 genes’ cDNA of wild type of Gp. lemaneiformis. M: marker. Number 1-48 indicated cDNA sequences of different E3 ubiquitin ligase genes.
Quantum Phases of Ultracold Bosonic Atoms in a One Dimensional Optical Superlattice
Creators: name: Dhar, Arya
name: Mishra, Tapan
name: Pai, Ramesh V.
name: Das, B. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We analyze various quantum phases of ultracold bosonic atoms in a periodic one dimensional optical superlattice. Our studies have been performed using the finite size density matrix renormalization group (FS-DMRG) method in the framework of the Bose-Hubbard model. Calculations have been carried out for a wide range of densities and the energy shifts due to the superlattice potential. At commensurate fillings, we find the Mott insulator and the superfluid phases as well as Mott insulators induced by the superlattice. At a particular incommensurate density, the system is found to be in the superfluid phase coexisting with density oscillations for a certain range of parameters of the system.
description: 7 pages, 11 figures
A General Framework for Portfolio Construction Based on Generative Models of Asset Returns
Creators: name: Cheng, Tuoyuan
name: Chen, Kan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Portfolio Management (q-fin.PM)
subject: FOS: Economics and business

description: In this paper, we present an integrated approach to portfolio construction and optimization, leveraging high-performance computing capabilities. We first explore diverse pairings of generative model forecasts and objective functions used for portfolio optimization, which are evaluated using performance-attribution models based on LASSO. We illustrate our approach using extensive simulations of crypto-currency portfolios, and we show that the portfolios constructed using the vine-copula generative model and the Sharpe-ratio objective function consistently outperform. To accommodate a wide array of investment strategies, we further investigate portfolio blending and propose a general framework for evaluating and combining investment strategies. We employ an extension of the multi-armed bandit framework and use value models and policy models to construct eclectic blended portfolios based on past performance. We consider similarity and optimality measures for value models and employ probability-matching ("blending") and a greedy algorithm ("switching") for policy models. The eclectic portfolios are also evaluated using LASSO models. We show that the value model utilizing cosine similarity and logit optimality consistently delivers robust superior performances. The extent of outperformance by eclectic portfolios over their benchmarks significantly surpasses that achieved by individual generative model-based portfolios over their respective benchmarks.
Testing astroparticle physics with the Fermi Large Area Telescope
Creators: name: Morselli, Aldo
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Our understanding of the Universe today includes overwhelming observational evidence for the existence of an elusive form of matter that is generally referred to as dark. Although many theories have been developed to describe its nature, very little is actually known about its properties. Since its launch in 2008, the Large Area Telescope, onboard the Fermi Gamma-ray Space Telescope, has detected by far the greatest number ever of gamma rays, in the 20MeV 300GeV energy range and electrons + positrons in the 7 GeV- 1 TeV range. This impressive statistics allows one to perform a very sensitive indirect experimental search for dark matter. I will present the latest results on these searches.
description: 6 pages, 9 figures, proceedings of the invited talk presented at CRIS 2010
Physics teachers and China's curriculum reform : the interplay between agency and structure
Creators: name: Fu, Guopeng
Publisher: name: University of British Columbia
Year: 2014

description: This study explored how individual and collective agencies among physics teachers in a select high school were enabled and constrained in the context of the on-going curriculum reform in China. Human agency as used in this study was informed by five perspectives: Bandura’s Social Cognitive Theory; Giddens’ Structuration Theory; Giroux’s critical pedagogy; Seixas’ historical consciousness; and Davies’ feminist and poststructuralist perspective. The study employed autoethnographical methods including observation, interviewing, the researcher’s and teachers’ reflective journaling, and data collection through the researcher’s involvement with various school activities which took place in one high school. The analysis of the data corpus employed portraiture and constant comparative method. The portraits of the researcher and selected teachers depicted their agencies in terms of origin, motivation, shape, and negotiation. The findings included: 1) individual teacher agency was significantly influenced by history, currency, moral standards, and students; 2) collective agency was shaped by structural changes, leadership and modern technology; and 3) collective teacher agency created the demands for individual teachers’ professional development, a conducive culture for teacher collaboration, and concrete examples that teachers could constantly refer to, reflect upon, and learn from for reform implementation. These results offer important insights for understanding how physics teacher agency is manifest in the on-going curriculum reform in China. Further, the study offers a clear understanding of the influences underlying physics teachers’ agency deployment as they engage with the curriculum reform process. Finally, this study’s findings justify a case for preparing physics teachers on how to deploy both individual and collective agencies in the face of the complicated social structures and ultimately shed light on the desired curriculum decentralization in China.
Sum rate analysis of a reduced feedback OFDMA system employing joint scheduling and diversity
Creators: name: Seong-Ho
name: Hur
name: Rao, Bhaskar D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider joint scheduling and diversity to enhance the benefits of multiuser diversity in an \OFDMA{} system. The \OFDMA{} spectrum is assumed to consist of $\Nrb$ resource blocks and the reduced feedback scheme consists of each user feeding back channel quality information (\CQI) for only the best-$\NFb$ resource blocks. Assuming largest normalized \CQI{} scheduling and a general value for $\NFb$, we develop a unified framework to analyze the sum rate of the system for both the quantized and non-quantized \CQI{} feedback schemes. Based on this framework, we provide closed-form expressions for the sum rate for three different multi-antenna transmitter schemes; Transmit antenna selection (\TAS), orthogonal space time block codes (\OSTBC) and cyclic delay diversity (\CDD). Furthermore, we approximate the sum rate expression and determine the feedback ratio $(\frac{\NFb}{\Nrb})$ required to achieve a sum rate comparable to the sum rate obtained by a full feedback scheme.
description: In revision for IEEE Trans. Signal Processing
Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure
Creators: name: Ogusu, Hiroki
name: Takeshita, Nao
name: Izawa, Koichi
name: Yamaura, Jun-ichi
name: Ohishi, Yasuo
name: Tsutsui, Satoshi
name: Okamoto, Yoshihiko
name: Hiroi, Zenji
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Rattling-induced superconductivity in the β-pyrochlore oxide KOs2O6 is investigated under high pressure up to 5 GPa. Resistivity measurements in a high-quality single crystal reveal a gradual decrease in the superconducting transition temperature Tc from 9.7 K at 1.0 GPa to 6.5 K at 3.5 GPa, followed by a sudden drop to 3.3 K at 3.6 GPa. Powder X-ray diffraction experiments show a structural transition from cubic to monoclinic or triclinic at a similar pressure. The sudden drop in Tc is ascribed to this structural tran-sition, by which an enhancement in Tc due to a strong electron-rattler interaction present in the low-pressure cubic phase is abrogated as the rattling of the K ion is completely suppressed or weakened in the high-pressure phase of reduced symmetry. In addition, we find two anomalies in the temperature dependence of resistivity in the low-pressure phase, which may be due to subtle changes in rattling vibration.
description: 6 pages, 4 figures
title: Dynamic Vision Sensor Data for Visual Inspection Tasks
title: Datasets for research article "An Extended Modular Processing Pipeline for Event-Based Vision in Automatic Visual Inspection". Sensors 2021, 21, 6143
titleType: AlternativeTitle
Creators: name: Maier, Georg
name: Beck, Moritz
name: Flitter, Merle
name: Gruna, Robin
name: Längle, Thomas
name: Heizmann, Michael
name: Beyerer, Jürgen
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: subject: Dynamic Vision Sensor DVS
subject: Neuromorphic Vision Sensors
subject: Visual Inspection
subject: Machine Vision
subject: DDC::000 Informatik, Informationswissenschaft, allgemeine Werke::000 Informatik, Wissen, Systeme::004 Datenverarbeitung; Informatik

description: Datasets used in the research article "An Extended Modular Processing Pipeline for Event-Based Vision in Automatic Visual Inspection". The datasets provided contain the pre-processed data for the wooden balls and beans dataset referred to in the article. If you are interested in the unprocessed raw data, please contact the corresponding author.
description: To cite this dataset, please reference: Beck, M.; Maier, G.; Flitter, M.; Gruna, R.; Längle, T.; Heizmann, M.; Beyerer, J. An Extended Modular Processing Pipeline for Event-Based Vision in Automatic Visual Inspection. Sensors 2021, 21, 6143. https://doi.org/10.3390/s21186143
Amphinemura coreana Zwick 1973
Creators: name: Zwick, Peter
name: Baumann, Richard W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae
Amphinemura
Amphinemura coreana

description: Amphinemura coreana Zwick 1973 Republic of Korea, Shichon City, Nam-do, Chong [not located], 6 April 1997, 3♂, 1♀.
description: Published as part of Zwick, Peter & Baumann, Richard W., 2011, Nemoura Jejudoensis A New Species Of Stonefly And The Redescription Of Amphinemura Baei Ham And Lee (Plecoptera, Nemouridae) From Jeju Island, Korea, pp. 148-155 in Illiesia 7 (15) on page 154, DOI: 10.5281/zenodo.4760189