cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Static Spherically Symmetric Solution of (R +- μ^4/R) Gravity
Creators: name: Saaidi, Kh.
name: Vaji, A.
name: Aghamomammadi, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The static spherically symmetric solution for (R +- μ^4/R) model of f(R)gravity is investigated. We obtain the metric for space-time in the solar system that reduces to the Schwarzschild metric, when μ tends to zero. For the obtained metric, the deviation from Einstein gravity is very small. This result is different from the other results have been obtained by equivalence between f(R) gravity and scalar tensor theory. Also it is shown that the vacuum solution in the solar system depends on the shape of matter distribution which differ from the Einstein's gravity.
Combining Minkowski and Chebyshev: New distance proposal and survey of distance metrics using k-nearest neighbours classifier
Creators: name: Rodrigues, Érick Oliveira
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This work proposes a distance that combines Minkowski and Chebyshev distances and can be seen as an intermediary distance. This combination not only achieves efficient run times in neighbourhood iteration tasks in Z^2, but also obtains good accuracies when coupled with the k-Nearest Neighbours (k-NN) classifier. The proposed distance is approximately 1.3 times faster than Manhattan distance and 329.5 times faster than Euclidean distance in discrete neighbourhood iterations. An accuracy analysis of the k-NN classifier using a total of 33 datasets from the UCI repository, 15 distances and values assigned to k that vary from 1 to 200 is presented. In this experiment, the proposed distance obtained accuracies that were better than the average more often than its counterparts (in 26 cases out of 33), and also obtained the best accuracy more frequently (in 9 out of 33 cases).
description: Pattern Recognition Letters, 2018
Continued Fractions and the Partially Asymmetric Exclusion Process
Creators: name: Blythe, R. A.
name: Janke, W.
name: Johnston, D. A.
name: Kenna, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We note that a tridiagonal matrix representation of the algebra of the partially asymmetric exclusion process (PASEP) lends itself to interpretation as the transfer matrix for weighted Motzkin lattice paths. A continued fraction ("J-Fraction") representation of the lattice path generating function is particularly well suited to discussing the PASEP, for which the paths have height dependent weights. We show that this not only allows a succinct derivation of the normalisation and correlation lengths of the PASEP, but also reveals how finite-dimensional representations of the PASEP algebra, valid only along special lines in the phase diagram, relate to the general solution that requires an infinite-dimensional representation.
CA-SBA-684: Archaeological site record for CA-SBA-684
Creators: name: Kekich, Jessica
Year: 1971
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: North America (Continent)
valueUri: https://core.tdar.org/browse/geographic-keyword/2890/north-america-continent
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: CA-SBA-684
valueUri: https://core.tdar.org/browse/site-name/93100/ca-sba-684
subject: Trace surface density chipping detritus
valueUri: https://core.tdar.org/browse/site-type/5374/trace-surface-density-chipping-detritus
subject: Temporary chipping-hunting-fishing site
valueUri: https://core.tdar.org/browse/site-type/5375/temporary-chipping-hunting-fishing-site
subject: Archaeological Feature
valueUri: https://core.tdar.org/browse/site-type/339/archaeological-feature
subject: Artifact Scatter
valueUri: https://core.tdar.org/browse/site-type/340/artifact-scatter
subject: Shell
valueUri: https://core.tdar.org/browse/material-type/14/shell
subject: Chiton sp.
valueUri: https://core.tdar.org/browse/material-type/4110/chiton-sp
subject: Mammal Bone
valueUri: https://core.tdar.org/browse/material-type/1312/mammal-bone
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Fauna
valueUri: https://core.tdar.org/browse/material-type/4/fauna
subject: Blackish-yellow Monterey chert
valueUri: https://core.tdar.org/browse/material-type/4809/blackish-yellow-monterey-chert
subject: Archaeological Overview
valueUri: https://core.tdar.org/browse/investigation-type/1/archaeological-overview
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the archaeological site record for CA-SBA-684. The record consists of a single recordation event.
Low-frequency Raman signature of Ag-intercalated few-layer MoS$_2$
Creators: name: Sheremetyeva, Natalya
name: Niedzielski, Drake
name: Tristant, Damien
name: Liang, Liangbo
name: Kerstetter, Lauren E.
name: Mohney, Suzanne E.
name: Meunier, Vincent
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Density functional theory based calculations and experimental analysis on a limited number of real samples are performed to study how the presence of silver intercalated in the van der Waals gap of few-layer MoS$_2$ affects the low-frequency Raman active modes of this material. Silver is found to predominantly affect the breathing-like and shear-like vibrational modes of MoS$_2$. These modes correspond to quasi-rigid movements of each individual layer with a restoring force (and, in turn, frequency) that is determined by modulations in the weak interlayer interactions. Noticeable red-shifts with increasing Ag concentration are found for all low-frequency modes. This finding indicates the potential for low-frequency vibrations as useful gauges for practical determination of silver concentration using low-frequency Raman spectroscopy. This work also describes a semi-classical linear chain model that allows to extrapolate results to a large number of layers. Further, first-principles calculations show how Raman spectroscopy can be used to characterize the quality of the two-dimensional interface between MoS$_2$ and a silver substrate.
Bifurcation and chaos in spin-valve pillars in a periodic applied magnetic field
Creators: name: Murugesh, S.
name: Lakshmanan, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the bifurcation and chaos scenario of the macro-magnetization vector in a homogeneous nanoscale-ferromagnetic thin film of the type used in spin-valve pillars. The underlying dynamics is described by a generalized Landau-Lifshitz-Gilbert (LLG) equation. The LLG equation has an especially appealing form under a complex stereographic projection, wherein the qualitative equivalence of an applied field and a spin-current induced torque is transparent. Recently chaotic behavior of such a spin vector has been identified by Zhang and Li using a spin polarized current passing through the pillar of constant polarization direction and periodically varying magnitude, owing to the spin-transfer torque effect. In this paper we show that the same dynamical behavior can be achieved using a periodically varying applied magnetic field, in the presence of a constant DC magnetic field and constant spin current, which is technically much more feasible, and demonstrate numerically the chaotic dynamics in the system for an infinitely thin film. Further, it is noted that in the presence of a nonzero crystal anisotropy field chaotic dynamics occurs at much lower magnitudes of the spin-current and DC applied field.
description: 8 pages, 7 figures. To appear in Chaos
Trachycephalus venulosus
Creators: name: Cintra, Carlos Eduardo Domingos
name: Silva, Hélder Lúcio Rodrigues
name: Jr, Nelson Jorge Da Silva
name: Garcia, Paulo Christiano De Anchietta
name: Zaher, Hussam
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Hylidae
Trachycephalus
Trachycephalus venulosus

description: Trachycephalus venulosus (N= 11) BRAZIL: Goiás: MZUSP 138319 (skull examined), MZUSP 138471 - 80.
description: Published as part of Cintra, Carlos Eduardo Domingos, Silva, Hélder Lúcio Rodrigues, Jr, Nelson Jorge Da Silva, Garcia, Paulo Christiano De Anchietta & Zaher, Hussam, 2009, A new species of Trachycephalus (Amphibia, Anura, Hylidae) from the State of Goiás, Brazil, pp. 58-68 in Zootaxa 1975 on page 68, DOI: 10.5281/zenodo.185123
Jet Quenching in Evolving QGP Medium
Creators: name: Jeon, Sangyong
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A short summary of different approaches to the parton energy loss problem is given. A particular attention is paid to the differences between various models. A possible solution to the problem of distinguishing competing approaches is discussed.
description: 8 pages, 8 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
DyOCl: a rare-earth based two-dimensional van der Waals material with strong magnetic anisotropy
Creators: name: Tian, Congkuan
name: Pan, Feihao
name: Ye, Dehua
name: Sheng, Jieming
name: Wang, Jinchen
name: Liu, Juanjuan
name: Huang, Jiale
name: Zhang, Hongxia
name: Xu, Daye
name: Qin, Jianfei
name: Hao, Lijie
name: Xia, Yuanhua
name: Li, Hao
name: Tong, Xin
name: Wu, Liusuo
name: Chen, Jian-Hao
name: Jia, Shuang
name: Cheng, Peng
name: Yang, Jianhui
name: Zheng, Youqu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Comparing with the widely known transitional metal based van der Waals (vdW) materials, rare-earth based ones are rarely explored in the research of intrinsic two-dimensional (2D) magnetism. In this work, we report the physical properties of DyOCl, a rare-earth based vdW magnetic insulator with direct band gap of $\sim 5.72~eV$. The magnetic order of bulk DyOCl is determined by neutron scattering as the $A$-type antiferromagnetic structure below the Néel temperature $T_N=10~$K. The large magnetic moment near 10.1 $ μ_{B} $/Dy lies parallel to the $a$-axis with strong uniaxial magnetic anisotropy. At $2~K$, a moderate magnetic field ($\sim 2~T$) applied along the easy axis generates spin-flip transitions and polarizes DyOCl to a ferromagnetic state. Density functional theory calculations reveal an extremely large magnetic anisotropy energy ($-5850~μeV/Dy$) for DyOCl, indicating the great potentials to realize magnetism in 2D limit. Furthermore, the mechanical exfoliation of bulk DyOCl single crystals down to seven layers is demonstrated. Our findings suggest DyOCl is a promising material playground to investigate 2D $f$-electron magnetism and spintronic applications at the nanoscale.
Random sampling vs. exact enumeration of attractors in random Boolean networks
Creators: name: Berdahl, Andrew
name: Shreim, Amer
name: Sood, Vishal
name: Paczuski, Maya
name: Davidsen, Joern
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We clarify the effect different sampling methods and weighting schemes have on the statistics of attractors in ensembles of random Boolean networks (RBNs). We directly measure cycle lengths of attractors and sizes of basins of attraction in RBNs using exact enumeration of the state space. In general, the distribution of attractor lengths differs markedly from that obtained by randomly choosing an initial state and following the dynamics to reach an attractor. Our results indicate that the former distribution decays as a power-law with exponent 1 for all connectivities $K>1$ in the infinite system size limit. In contrast, the latter distribution decays as a power law only for K=2. This is because the mean basin size grows linearly with the attractor cycle length for $K>2$, and is statistically independent of the cycle length for K=2. We also find that the histograms of basin sizes are strongly peaked at integer multiples of powers of two for $K<3$.
Intermediate-field two-photon absorption enhancement by shaped femtosecond pulses with spectral phases of antisymmetric nature
Creators: name: Chuntonov, Lev
name: Rybak, Leonid
name: Gandman, Andrey
name: Amitay, Zohar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We demonstrate and study the enhancement of intermediate-field two-photon absorption by shaped femtosecond pulses having spectral phases of antisymmetric nature. The intermediate-field regime corresponds to pulse intensities, where the two-photon absorption is coherently induced by the weak-field nonresonant two-photon transitions as well as by additional resonance-mediated four-photon transitions. It is a regime of significant excitation yields, exceeding the weak-field yields by two orders of magnitudes, reaching about 10-20% population transfer. The considered antisymmetric nature is with respect to one-half of the (initial-to-final) two-photon transition frequency. The corresponding pulse spectrum is detuned from this frequency (the detuning direction is according to the system). We study in detail the coherent interference mechanism leading to the observed enhancement using forth-order frequency-domain perturbative analysis. We also show that, even though the maximal enhancement is achieved with phase patterns of perfect antisymmetry, at high enough intermediate-field intensities absorption enhancement beyond the transform-limited level is still achievable even with patterns having some degree of deviation from perfect antisymmetry. The degree of tolerance to deviations from perfect antisymmetry increases as the pulse intensity increases. The theoretical and experimental model system of the study is atomic sodium. These findings are of particular importance for coherent control scenarios that simultaneously involve multiple excitation channels.
Japanese joint ventures in British Columbia
Creators: name: Duval, Jean-Marc
Publisher: name: University of British Columbia
Year: 2010

description: Joint ventures as a form of overseas direct investment are more and more a current topic of discussion. Arguments for and against this form of investment vary from one extreme to the other: some people think that multinational corporations should not operate in foreign countries without local participation, while others state that these companies should be free to conduct their operations as necessary. Even though I favor one position, this research did not analyse Japanese joint ventures in British Columbia from such points of view. An account of the study and the format of the study appears in Chapter 1. The method used to carry out this research was to examine data collected in interviews with executives of twenty one joint ventures in British Columbia. None of the work would have been possible without the cooperation of these executives who gave of their time and who were ready to disclose confidential information, in return for which, the anonymity of their firms was guaranteed. Thanks are due to Virginia and Ronald Monk, my editors, who spent many hours improving my English. I am particularly indebted to Dr. J.W.C. Tomlinson, who read and criticized the first draft of this dissertation. Without his encourage merits and criticisms, this study would have been more difficult and certainly less complete.
SPS energy scan results and physics prospects at FAIR
Creators: name: Hohne, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Experimental studies of nucleus-nucleus collisions in the whole SPS energy range are reviewed. Selected topics such as statistical properties of the hadronic phase, strangeness production, fluctuations and correlations are discussed with regard to information on the onset of deconfinement and the critical point of strongly interacting matter. In spite of the very interesting results obtained in particular at the low SPS energies, additional data including rare probes such as charmed particles and di-leptons are required for a precise understanding of the underlying physics. An outlook about prospects and capabilities of upcoming experiments in this interesting energy region at RHIC, SPS, and in particular with CBM at FAIR, is given.
description: 8 pages, 8 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
Spectroscopic signature of surface states and bunching of bulk subbands in topological insulator (Bi$_{0.4}$Sb$_{0.6}$)$_2$Te$_3$ thin films
Creators: name: Mulder, L.
name: Castenmiller, C.
name: Witmans, F. J.
name: Smit, S.
name: Golden, M. S.
name: Zandvliet, H. J. W.
name: de Boeij, P. L.
name: Brinkman, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High quality thin films of the topological insulator (Bi$_{0.4}$Sb$_{0.6}$)$_2$Te$_3$ have been deposited on SrTiO$_3$ (111) by molecular beam epitaxy. Their electronic structure was investigated by in situ angle-resolved photoemission spectroscopy and in situ scanning tunneling spectroscopy. The experimental results reveal striking similarities with relativistic ab-initio tight binding calculations. We find that ultrathin slabs of the three-dimensional topological insulator (Bi$_{0.4}$Sb$_{0.6}$)$_2$Te$_3$ display topological surface states, surface states with large weight on the outermost Te atomic layer, and dispersive bulk energy levels that are quantized. We observe that the bandwidth of the bulk levels is strongly reduced. These bunched bulk states as well as the surface states give rise to strong peaks in the local density of states.
description: 8 pages, 4 figures, 4 pages of supplemental material
Minimal Distortion Morphs Generated by Time-Dependent Vector Fields
Creators: name: Bihun, Oksana
name: Chicone, Carmen
name: Harris, Steven G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58E99

description: A morph between two Riemannian $n$-manifolds is an isotopy between them together with the set of all intermediate manifolds equipped with Riemannian metrics. We propose measures of the distortion produced by some classes of morphs and diffeomorphisms between two isotopic Riemannian $n$-manifolds and, with respect to these classes, prove the existence of minimal distortion morphs and diffeomorphisms. In particular, we consider the class of time-dependent vector fields (on an open subset $Ω$ of $ \R^{n+1}$ in which the manifolds are embedded) that generate morphs between two manifolds $M$ and $N$ via an evolution equation, define the bending and the morphing distortion energies for these morphs, and prove the existence of minimizers of the corresponding functionals in the set of time-dependent vector fields that generate morphs between $M$ and $N$ and are $L^2$ functions from $[0,1]$ to the Sobolev space $W^{k,2}_0(Ω,\R^{n+1})$.
description: 41 pages, 3 figues
Power spectrum in the Chaplygin gas model: tachyonic, fluid and scalar field representations
Creators: name: Batista, C. E. M.
name: Fabris, J. C.
name: Morita, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Chaplygin gas model, characterized by an equation of state of the type $p = - \frac{A}ρ$ emerges naturally from the Nambu-Goto action of string theory. This fluid representation can be recast under the form of a tachyonic field given by a Born-Infeld type Lagrangian. At the same time, the Chaplygin gas equation of state can be obtained from a self-interacting scalar field. We show that, from the point of view of the supernova type Ia data, the three representations (fluid, tachyonic, scalar field) lead to the same results. However, concerning the matter power spectra, while the fluid and tachyonic descriptions lead to exactly the same results, the self-interacting scalar field representation implies different statistical estimations for the parameters. In particular, the estimation for the dark matter density parameter in the fluid representation favors a universe dominated almost completely by dark matter, while in the self-interacting scalar field representation the prediction is very closed to that obtained in the $Λ$CDM model.
description: Latex file, 10 pages, 18 figures in EPS format
Boundary stabilization of transmission problems
Creators: name: Cardoso, Fernando
name: Vodev, Georgi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study the transmission problem in bounded domains with dissipative boundary conditions. Under some natural assumptions, we prove uniform bounds of the corresponding resolvents on the real axis at high frequency, and as a consequence, we obtain free of eigenvalues regions. As an application, we get exponential decay of the energy of the solutions of the correpsonding mixed boundary value problems.
description: 18 pages
New Science on the Open Science Grid
Creators: name: Board, The Open Science Grid Executive
name: :
name: Pordes, Ruth
name: Altunay, Mine
name: Avery, Paul
name: Bejan, Alina
name: Blackburn, Kent
name: Blatecky, Alan
name: Gardner, Rob
name: Kramer, Bill
name: Livny, Miron
name: McGee, John
name: Potekhin, Maxim
name: Quick, Rob
name: Olson, Doug
name: Roy, Alain
name: Sehgal, Chander
name: Wenaus, Torre
name: Wilde, Mike
name: Wuerthwein, Frank
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The Open Science Grid (OSG) includes work to enable new science, new scientists, and new modalities in support of computationally based research. There are frequently significant sociological and organizational changes required in transformation from the existing to the new. OSG leverages its deliverables to the large scale physics experiment member communities to benefit new communities at all scales through activities in education, engagement and the distributed facility. As a partner to the poster and tutorial at SciDAC 2008, this paper gives both a brief general description and some specific examples of new science enabled on the OSG. More information is available at the OSG web site: (http://www.opensciencegrid.org).
A Shocking Solar Nebula?
Creators: name: Liffman, Kurt
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: It has been suggested that shock waves in the solar nebula formed the high temperature materials observed in meteorites and comets. It is shown that the temperatures at the inner rim of the solar nebula could have been high enough over a sufficient length of time to produce chondrules, CAIs, refractory dust grains and other high-temperature materials observed in comets and meteorites. The solar bipolar jet flow may have produced an enrichment of 16O in the solar nebula over time and the chondrule oxygen isotopic reservoirs are possibly due to temporal changes in the relative position of the inner edge of the solar nebula and the subsequent strength of the solar bipolar jet flow. As such, nebula heating models, such as the shock model, are not required to explain the formation of most high-temperature chondritic components
description: 19 pages, 5 figures
Fano Resonances in High-Tc Superconducting Metamaterial
Creators: name: Fedotov, V. A.
name: Shi, J. -H.
name: Tsiatmas, A.
name: de Groot, P.
name: Chen, Y.
name: Zheludev, N. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate a millimeter-wave range metamaterial fabricated from cuprate superconductor. Two complementary metamaterial structures have been studied, which exhibit Fano resonances emerging from the collective excitation of interacting magnetic and electric dipole modes.
description: 2 pages, 2 figures
Intrapopulation compatibility in Gonium pectorale Müller (Volvocales:Chlorosphyceae)
Creators: name: McCauley, Marion Joan
Publisher: name: University of British Columbia
Year: 2010

description: Forty clones of Gonium pectorale M'uller were crossed in all combinations at 20°C, and the resultant zygotes examined to determine the degree of sexual compatibility within a single population. Clones isolated from the same site but in different years were incompatible, indicating a lack of gene flow between them. Two distinct groups were found within 31 clones isolated from a single mud sample, and all the clones in one were incompatible with all those in the other. However, members of both groups were compatible with those in a third group. The existence of at least two complementary pairs of mating types within a single G. pectorale population, sensu Stein (1958b), is considered in the context of other sexual compatibility results, and is proposed as a reason for the occasional inability to obtain opposite mating types from a mud sample from which only a few clones have been isolated.
CA-SBA-664: Archaeological site record for CA-SBA-664
Creators: name: Kekich, Jessica
Year: 1971
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: United States of America (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/384/united-states-of-america-country
subject: North America (Continent)
valueUri: https://core.tdar.org/browse/geographic-keyword/2890/north-america-continent
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: CA-SBA-664
valueUri: https://core.tdar.org/browse/site-name/93088/ca-sba-664
subject: Trace surface scatter of chipping waste and mytilus shell
valueUri: https://core.tdar.org/browse/site-type/5310/trace-surface-scatter-of-chipping-waste-and-mytilus-shell
subject: Temporary chipping/hunting site
valueUri: https://core.tdar.org/browse/site-type/5311/temporary-chippinghunting-site
subject: Archaeological Feature
valueUri: https://core.tdar.org/browse/site-type/339/archaeological-feature
subject: Artifact Scatter
valueUri: https://core.tdar.org/browse/site-type/340/artifact-scatter
subject: Shell
valueUri: https://core.tdar.org/browse/material-type/14/shell
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Archaeological Overview
valueUri: https://core.tdar.org/browse/investigation-type/1/archaeological-overview
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the archaeological site record for CA-SBA-664. The record consists of a single recordation event.
Fifty Years of Stiffness
Creators: name: Brugnano, Luigi
name: Mazzia, Francesca
name: Trigiante, Donato
Publisher: name: arXiv
Year: 2009
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65L04

description: The notion of stiffness, which originated in several applications of a different nature, has dominated the activities related to the numerical treatment of differential problems for the last fifty years. Contrary to what usually happens in Mathematics, its definition has been, for a long time, not formally precise (actually, there are too many of them). Again, the needs of applications, especially those arising in the construction of robust and general purpose codes, require nowadays a formally precise definition. In this paper, we review the evolution of such a notion and we also provide a precise definition which encompasses all the previous ones.
description: 24 pages, 11 figures
A Modeling Framework for Reliability of Erasure Codes in SSD Arrays
Creators: name: Kishani, Mostafa
name: Ahmadian, Saba
name: Asadi, Hossein
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: To help reliability of SSD arrays, Redundant Array of Independent Disks (RAID) are commonly employed. However, the conventional reliability models of HDD RAID cannot be applied to SSD arrays, as the nature of failures in SSDs are different from HDDs. Previous studies on the reliability of SSD arrays are based on the deprecated SSD failure data, and only focus on limited failure types, device failures, and page failures caused by the bit errors, while recent field studies have reported other failure types including bad blocks and bad chips, and a high correlation between failures. In this paper, we explore the reliability of SSD arrays using field storage traces and real-system implementation of conventional and emerging erasure codes. The reliability is evaluated by statistical fault injections that post-process the usage logs from the real-system implementation, while the fault/failure attributes are obtained from field data. As a case study, we examine conventional and emerging erasure codes in terms of both reliability and performance using Linux MD RAID and commercial SSDs. Our analysis shows that a) emerging erasure codes fail to replace RAID6 in terms of reliability, b) row-wise erasure codes are the most efficient choices for contemporary SSD devices, and c) previous models overestimate the SSD array reliability by up to six orders of magnitude, as they focus on the coincidence of bad pages and bad chips that roots the minority of Data Loss (DL) in SSD arrays. Our experiments show that the combination of bad chips with bad blocks is the major source of DL in RAID5 and emerging codes (contributing more than 54% and 90% of DL in RAID5 and emerging codes, respectively), while RAID6 remains robust under these failure combinations. Finally, the fault injection results show that SSD array reliability, as well as the failure breakdown is significantly correlated with SSD type.
Variability of the methane trapping in martian subsurface clathrate hydrates
Creators: name: Thomas, Caroline
name: Mousis, Olivier
name: Picaud, Sylvain
name: Ballenegger, Vincent
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent observations have evidenced traces of methane CH4 heterogeneously distributed in the martian atmosphere. However, because the lifetime of CH4 in the atmosphere of Mars is estimated to be around 300-600 years on the basis of photochemistry, its release from a subsurface reservoir or an active primary source of methane have been invoked in the recent literature. Among the existing scenarios, it has been proposed that clathrate hydrates located in the near subsurface of Mars could be at the origin of the small quantities of the detected CH4. Here, we accurately determine the composition of these clathrate hydrates, as a function of temperature and gas phase composition, by using a hybrid statistical thermodynamic model based on experimental data. Compared to other recent works, our model allows us to calculate the composition of clathrate hydrates formed from a more plausible composition of the martian atmosphere by considering its main compounds, i.e. carbon dioxyde, nitrogen and argon, together with methane. Besides, because there is no low temperature restriction in our model, we are able to determine the composition of clathrate hydrates formed at temperatures corresponding to the extreme ones measured in the polar caps. Our results show that methane enriched clathrate hydrates could be stable in the subsurface of Mars only if a primitive CH4-rich atmosphere has existed or if a subsurface source of CH4 has been (or is still) present.
description: Accepted for publication in Planetary and Space Science
MPEC 2024-S147 : 2024 SS3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SS3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
NVS-MonoDepth: Improving Monocular Depth Prediction with Novel View Synthesis
Creators: name: Bauer, Zuria
name: Li, Zuoyue
name: Orts-Escolano, Sergio
name: Cazorla, Miguel
name: Pollefeys, Marc
name: Oswald, Martin R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Building upon the recent progress in novel view synthesis, we propose its application to improve monocular depth estimation. In particular, we propose a novel training method split in three main steps. First, the prediction results of a monocular depth network are warped to an additional view point. Second, we apply an additional image synthesis network, which corrects and improves the quality of the warped RGB image. The output of this network is required to look as similar as possible to the ground-truth view by minimizing the pixel-wise RGB reconstruction error. Third, we reapply the same monocular depth estimation onto the synthesized second view point and ensure that the depth predictions are consistent with the associated ground truth depth. Experimental results prove that our method achieves state-of-the-art or comparable performance on the KITTI and NYU-Depth-v2 datasets with a lightweight and simple vanilla U-Net architecture.
description: 8 pages (main paper), 9 pages (supplementary material), 14 figures, 4 tables
Long-Term Productivity Based on Science, not Preference
Creators: name: Smith, Spencer
name: Carette, Jacques
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.8; G.4

description: This position paper argues that decisions on processes, tools, techniques and software artifacts (such as user manuals, unit tests, design documents and code) for scientific software development should be driven by science, not by personal preference. Decisions should not be based on anecdotal evidence, gut instinct or the path of least resistance. Moreover, decisions should vary depending on the users and the context. In most cases of interest, this means that a longer term view should be adopted. We need to use a scientific approach based on unambiguous definitions, empirical evidence, hypothesis testing and rigorous processes. By developing an understanding of where input hours are spent, what most contributes to user satisfaction, and how to leverage knowledge produced, we can determine what interventions have the greatest value relative to the invested effort. We will be able to recommend software production processes that justify their value because the long-term output benefits are high compared to the required input resources. A preliminary definition of productivity is presented, along with ideas on how to potentially measure this quality. We briefly explore the idea of improving productivity via an approach where all artifacts are generated from codified knowledge.
description: 2 pages
Establishing an appropriate landing fee schedule at Vancouver International Airport
Creators: name: Shanks, Andrew David
Publisher: name: University of British Columbia
Year: 2010

description: The last twenty years has seen a tremendous increase in aviation activity within Canada. Air links have been established and improved and safety standards upgraded to the point where the air can now be regarded as the optimum environment in which to travel. Because of its tremendous popularity, flying has also placed demands on the public purse. Every year more money is allocated to the aviation sector. Until recently, this outflow of funds continued virtually unchecked. With an increasing awareness of ecological balance and the impending depletion of non-renewable resources, public opinion has begun to question the viability of increased aviation investment. In consideration of these factors, this work has investigated the economic theory upon which rational pricing is based. Given the current level of investment, the first chapter examines the relationship between the present level of demand for aviation services, and the appropriate level of price to be assessed against this demand. Demand is also used to formulate a decision framework for future investment in airports. Succeeding chapters introduce research conducted in the United States which attempts to relate the economic theory presented above to a practical pricing schedule. The final chapter incorporates all of the work described above. Using the Airborne Instrument Laboratory, Airport Capacity Handbook, the practical capacity of Vancouver International Airport (movements per hour) is calculated. Consideration is given to prevailing weather patterns as well as the configuration and characteristics of the runways to arrive at the annual capacity of the airport. This capacity figure is then used to determine how appropriate the current levels of landing fees are at Vancouver International Airport. Ratios of processing time are determined for Air Carrier and General Aviation aircraft. These ratios, which reflect the time required for an aircraft of one class to land relative to the time required for an aircraft of the other class to land, are calculated for various mixes of the aircraft population. Using these ratios and weighting them with the frequency with which each ratio could be expected to occur, a schedule of opportunity cost (General Aviation - Air Carrier) is prepared. By applying the latter schedule to the current level of landing fees, an alternate schedule of landing fees at Vancouver International Airport has been calculated. By observing how the level of charges at Vancouver International Airport has been, to some degree, responsible for the pattern of investment there, it is evident that considerable improvement in the allocation of resources can be effected by revising this schedule. Application of the resultant fee schedule will not guarantee an improvement in the economy but utilization of the principles inherent in its derivation, will certainly clarify the direction change must take.
Manual del usuario Micelio, plataforma para la investigación UCA
Creators: name: Gutierrez, Kevin
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460505
subject: Database systems
classificationCode: 460599
subject: Data management and data science not elsewhere classified
classificationCode: 460503
subject: Data models, storage and indexing
classificationCode: 460508
subject: Information retrieval and web search

description: Micelio, plataforma para la investigación UCA gestionada por la Vicerrectoría de Investigación e Innovación en colaboración con el CRAI P. Florentino Idoate S.J. Esta guía tiene el objetivo de proporcionar a los usuarios una comprensión detallada de las funcionalidades, características y beneficios de Micelio, junto con instrucciones precisas para optimizar su uso.Micelio, basado en el software DSpace-CRIS 7, facilita la difusión, preservación, recopilación y organización de datos e información de investigación. Además, mejora la visibilidad y reutilización de datos a largo plazo y asegura el cumplimiento de los estándares éticos y legales tanto nacionales como internacionales, en la gestión de información.
Shear-Induced Unfolding Activates von Willebrand Factor A2 Domain for Proteolysis
Creators: name: Baldauf, Carsten
name: Schneppenheim, Reinhard
name: Stacklies, Wolfram
name: Obser, Tobias
name: Pieconka, Antje
name: Schneppenheim, Sonja
name: Budde, Ulrich
name: Graeter, Frauke
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: To avoid pathological platelet aggregation by von Willebrand factor (VWF), VWF multimers are regulated in size and reactivity for adhesion by ADAMTS13-mediated proteolysis in a shear flow dependent manner. We examined if tensile stress in VWF under shear flow activates the VWF A2 domain for cleavage by ADAMTS13 using molecular dynamics simulations. We indeed observed stepwise unfolding of A2 and exposure of its deeply buried ADAMTS13 cleavage site. Interestingly, disulfide bonds in the adjacent and highly homologous VWF A1 and A3 domains obstruct their mechanical unfolding. We generated a full length mutant VWF featuring a homologous disulfide bond in A2 (N1493C and C1670S), in an attempt to lock A2 against unfolding. We find this mutant to feature ADAMTS13-resistant behavior in vitro. Our results yield molecular-detail evidence for the force-sensoring function of VWF A2, by revealing how tension in VWF due to shear flow selectively exposes the A2 proteolysis site to ADAMTS13 for cleavage while keeping the folded remainder of A2 intact and functional. We find the unconventional knotted Rossman fold of A2 to be the key to this mechanical response, tailored for regulating VWF size and activity. Based on our model we can explain the pathomechanism of some natural mutations in the VWF A2 domain that significantly increase the cleavage by ADAMTS13 without shearing or chemical denaturation, and provide with the cleavage-activated A2 conformation a structural basis for the design of inhibitors for VWF type 2 diseases.
Backbone and Loop Remodelling is Essential for Design of Efficient De Novo Enzymes
Creators: name: Hunt, Serena
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: computational enzyme design
retro-aldolases
biocatalysis
directed evolution
enzyme engineering

description: The creation of artificial enzymes to catalyze desired reactions is a major goal of computational protein design. However, de novo enzymes display low catalytic efficiencies, requiring the introduction of activity-enhancing active site and distal mutations through directed evolution. A better understanding of how mutations introduced by directed evolution contribute to increased enzymatic activity will guide the development of design methods such that efficient enzymes can be designed de novo. Here, we evaluate the structural, functional, and dynamical impacts of active site and distal mutations introduced by directed evolution of the de novo retro-aldolase RA95, an enzyme that presents an important case study in enzyme design due to the significant structural remodelling that was observed during evolution. We observe that the variant RA95-Core, containing only active site mutations introduced by directed evolution, displays activity within one order of magnitude of the fully evolved variant. This suggests that computational enzyme design methods can be improved to create much more efficient enzymes than what was previously achieved in RA95. However, structural changes induced by distal mutations prevent computational recapitulation of the evolved active site on the original design template, indicating that the optimized active site identified through directed evolution could not have been designed de novo using current design methodologies. We suggest strategies for the incorporation of backbone remodelling into design procedures that would allow recapitulation of the evolved retro-aldolase active site, as well as the de novo design of highly efficient enzymes without the need for optimization by directed evolution.
Gaussian decomposition of HI surveys. V. Search for very cold clouds
Creators: name: Haud, Urmas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In the previous papers of this series, we have decomposed into Gaussian components all the HI 21-cm line profiles of the Leiden-Argentina-Bonn (LAB) database, and studied statistical distributions of the obtained Gaussians. Now we are interested in separation from the general database of the components the "clouds" of closely spaced similar Gaussians. In this paper we describe the new cloud-finding algorithm. To separate the clouds of similar Gaussians, we start with the single-link hierarchical clustering procedure in five-dimensional (longitude, latitude, velocity, Gaussian width and height) space, but make some modifications to accommodate it to the large number of components. We also use the requirement that each cloud may be represented at any observed sky position by only one Gaussian and take into account the similarity of global properties of the merging clouds. As a test, we apply the algorithm for finding the clouds of the narrowest HI 21-cm line components. Using the full sky search for cold clouds, we easily detect the coldest known HI clouds and demonstrate that actually they are a part of a long narrow ribbon of cold clouds. We model these clouds as a part of a planar gas ring, deduce their spatial placement, and discuss their relation to supernova shells in the solar neighborhood. We conclude that the proposed algorithm satisfactorily solves the posed task. We guess that the study of the narrowest HI 21-cm line components may be a useful tool for finding the structure of neutral gas in solar neighborhood.
description: 11 pages, 6 figures, short version will be published in "Astron. Astrophys", the version with full-resolution figures at http://www.aai.ee/~urmas/ast/Kits.pdf