cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
HILUCSI: Simple, Robust, and Fast Multilevel ILU for Large-Scale Saddle-Point Problems from PDEs
Creators: name: Chen, Qiao
name: Ghai, Aditi
name: Jiao, Xiangmin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Software (cs.MS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Incomplete factorization is a widely used preconditioning technique for Krylov subspace methods for solving large-scale sparse linear systems. Its multilevel variants, such as ILUPACK, are more robust for many symmetric or unsymmetric linear systems than the traditional, single-level incomplete LU (or ILU) techniques. However, the previous multilevel ILU techniques still lacked robustness and efficiency for some large-scale saddle-point problems, which often arise from systems of partial differential equations (PDEs). We introduce HILUCSI, or Hierarchical Incomplete LU-Crout with Scalability-oriented and Inverse-based dropping. As a multilevel preconditioner, HILUCSI statically and dynamically permutes individual rows and columns to the next level for deferred factorization. Unlike ILUPACK, HILUCSI applies symmetric preprocessing techniques at the top levels but always uses unsymmetric preprocessing and unsymmetric factorization at the coarser levels. The deferring combined with mixed preprocessing enabled a unified treatment for nearly or partially symmetric systems, and simplified the implementation by avoiding mixed $1\times 1$ and $2\times 2$ pivots for symmetric indefinite systems. We show that this combination improves robustness for indefinite systems without compromising efficiency. Furthermore, to enable superior efficiency for large-scale systems with millions or more unknowns, HILUCSI introduces a scalability-oriented dropping in conjunction with a variant of inverse-based dropping. We demonstrate the effectiveness of HILUCSI for dozens of benchmark problems, including those from the mixed formulation of the Poisson equation, Stokes equations, and Navier-Stokes equations. We also compare its performance with ILUPACK, the supernodal ILUTP in SuperLU, and multithreaded direct solvers in PARDISO and MUMPS.
description: Submitted to Numerical Linear Algebra with Applications (NLAA)
Does Investment in Technology Resources affect Motor Carrier Firm Performance?
Creators: name: Macdonald, John R.
name: Macdonald, John R.
Publisher: name: Unknown
Year: 2006
Subjects: Financial Economics
Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: Prevalent in the IT literature is the concept of the productivity paradox. This states that the effects of IT investment seem to show up everywhere except those that measure productivity (firm performance). Owing to the extremely competitive nature of the motor carrier industry, money must be well spent and provide the carrier with performance gains to survive. In this study, two measures of IT spending, physical capital and human capital, are used to examine whether IT investment does indeed affect carrier performance. Performance is measured as a level of firm efficiency (sales/employee). Results are significant and have important implications. The level of physical assets (computers) that a firm uses has a direct and positive impact on firm efficiency. However, the more human capital (programmers) a firm hires to develop software, the worse the efficiency of the firm. This suggests that perhaps motor carriers should invest in off-the-shelf IT packages as opposed to creating their own. Finally, the interaction of the two variables and sales was looked at to determine their effect as firms grow. The interaction of physical IT capital and firm size showed that as the firm grows, the effect of physical IT capital grows, suggesting that it may be an antidote to firm bureaucracy.
The system parameters of DW Ursae Majoris
Creators: name: Araujo-Betancor, S.
name: Knigge, C.
name: Long, K. S.
name: Hoard, D. W.
name: Szkody, P.
name: Rodgers, B.
name: Krisciunas, K.
name: Dhillon, V. S.
name: Hynes, R. I.
name: Patterson, J.
name: Kemp, J.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new constraints on the system parameters of the SW Sextantis star DW Ursae Majoris, based on ultraviolet (UV) eclipse observations with the Hubble Space Telescope. Our data were obtained during a low state of the system, in which the UV light was dominated by the hot white dwarf (WD) primary. Eclipse analysis, using the full Roche lobe geometry, allows us to set firm limits on the masses and radii of the system components and the distance between them: 0.67 \leq M_1/M_sun \leq 1.06, 0.008 \leq R_1/R_sun \leq 0.014, M_2/M_sun > 0.16, R_2/R_sun > 0.28 and a/R_sun > 1.05. For q = M_2/M_1 < 1.5 the inclination must satisfy i > 71 degrees. Using Smith & Dhillon's mass-period relation for CV secondaries, our estimates for the system parameters become M_1/M_sun = 0.77 \pm 0.07, R_1/R_sun = 0.012 \pm 0.001, M_2/M_sun = 0.30 \pm 0.10, R_2/R_sun = 0.34 \pm 0.04, q =0.39 \pm 0.12, i = 82 \pm 4 degrees and a/R_sun = 1.14 \pm 0.06. We have also estimated the spectral type of the secondary, M3.5 \pm 1.0, and distance to the system, d =930 \pm 160 pc, from time-resolved I- and K-band photometry. Finally, we have repeated Knigge et al.'s WD model atmosphere fit to the low-state UV spectrum of DW UMa in order to account for the higher surface gravity indicated by our eclipse analysis. In this way we obtained a second estimate for the distance, d = 590 \pm 100 pc, which allows us to obtain a second estimate for the spectral type of the secondary, M7 \pm 2.0. We conclude that the true value for the distance and spectral type will probably be in between the values obtained by the two methods.
description: 23 pages including 5 figures and 3 tables. Accepted for publication in ApJ
Single Ion Implantation for Solid State Quantum Computer Development
Creators: name: Schenkel, T.
name: Holder, J. P.
name: McDonald, J. W.
name: Meijer, J.
name: Persaud, A.
name: Schneider, D. H.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Condensed Matter (cond-mat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Several solid state quantum computer schemes are based on the manipulation of electron and nuclear spins of single donor atoms in a solid matrix. The fabrication of qubit arrays requires the placement of individual atoms with nanometer precision and high efficieny. In this article we describe first results from low dose, low energy implantations and our development of a low energy (<10keV), single ion implantation scheme for 31P(q+) ions. When 31P(q+) ions impinge on a wafer surface, their potential energy (9.3 keV for P15+) is released, and about 20 secondary electrons are emitted. The emission of multiple secondary electrons allows detection of each ion impact with 100% efficiency. The beam spot on target is controlled by beam focusing and collimation. Exactly one ion is implanted into a selected area avoiding a Poissonian distribution of implanted ions.
description: 6 pages; to appear in proceedings of SPIE, V. 4656, International Symposium on Integrated Optoelectronic Devices, "Nanotechnologies in Photonics - Quantum Computing and Information", San Jose, Ca, Jan. 2002
Intermediate Scaling and Logarithmic Invariance in Turbulent Pipe Flow
Creators: name: Diwan, Sourabh S.
name: Morrison, Jonathan F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76F02, 76F10

description: A three-layer asymptotic structure for turbulent pipe flow is proposed, revealing in terms of intermediate variables, the existence of a Reynolds-number invariant logarithmic region. It provides a theoretical foundation for addressing important questions in the scaling of the streamwise mean velocity and variance. The key insight emerging from the analysis is that the scale separation between two adjacent layers is proportional to $\sqrt{Re_τ}$, rather than $Re_τ$. This suggests that, in order to realise Reynolds-number asymptotic invariance, much higher Reynolds numbers may be necessary to achieve sufficient scale separation. The formulation provides a theoretical basis for explaining the presence of a power law for the mean velocity in pipe flow at low Reynolds numbers and the co-existence of power and log laws at higher Reynolds numbers. Furthermore, the Townsend-Perry `constant' for the variance is shown to exhibit a systematic Reynolds-number dependence.
description: 4 pages, 4 figures
Stability properties of a formulation of Einstein's equations
Creators: name: Calabrese, Gioel
name: Pullin, Jorge
name: Sarbach, Olivier
name: Tiglio, Manuel
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the stability properties of the Kidder-Scheel-Teukolsky (KST) many-parameter formulation of Einstein's equations for weak gravitational waves on flat space-time from a continuum and numerical point of view. At the continuum, performing a linearized analysis of the equations around flat spacetime, it turns out that they have, essentially, no non-principal terms. As a consequence, in the weak field limit the stability properties of this formulation depend only on the level of hyperbolicity of the system. At the discrete level we present some simple one-dimensional simulations using the KST family. The goal is to analyze the type of instabilities that appear as one changes parameter values in the formulation. Lessons learnt in this analysis can be applied in other formulations with similar properties.
description: 17 Pages, RevTex, 16 figures
Pew Research Center: August 2020 Survey
Creators: name: Pew Research Center
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Satisfaction with current state of the country (3); approval of President Trump (1); approval/role of federal government (5); attention on 2020 election (4); attitudes towards presidential candidates (4); opinion on political groups (1); attitudes towards political parties (1); power of Supreme Court (3); personal views on societal problems (2).
Geometric Sequence Decomposition with $k$-simplexes Transform
Creators: name: Lee, Woong-Hee
name: Lee, Jong-Ho
name: Sung, Ki Won
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper presents a computationally efficient technique for decomposing non-orthogonally superposed $k$ geometric sequences. The method, which is named as geometric sequence decomposition with $k$-simplexes transform (GSD-ST), is based on the concept of transforming an observed sequence to multiple $k$-simplexes in a virtual $k$-dimensional space and correlating the volumes of the transformed simplexes. Hence, GSD-ST turns the problem of decomposing $k$ geometric sequences into one of solving a $k$-th order polynomial equation. Our technique has significance for wireless communications because sampled points of a radio wave comprise a geometric sequence. This implies that GSD-ST is capable of demodulating randomly combined radio waves, thereby eliminating the effect of interference. To exemplify the potential of GSD-ST, we propose a new radio access scheme, namely non-orthogonal interference-free radio access (No-INFRA). Herein, GSD-ST enables the collision-free reception of uncoordinated access requests. Numerical results show that No-INFRA effectively resolves the colliding access requests when the interference is dominant.
Sato-Tate groups of abelian threefolds: a preview of the classification
Creators: name: Fité, Francesc
name: Kedlaya, Kiran S.
name: Sutherland, Andrew V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: Primary 11M50, Secondary 11G10, 11G20, 14G10, 14K15

description: We announce the classification of Sato-Tate groups of abelian threefolds over number fields; there are 410 possible conjugacy classes of closed subgroups of USp(6) that occur. We summarize the key points of the "upper bound" aspect of the classification, and give a more rigorous treatment of the "lower bound" by realizing 33 groups that appear in the classification as maximal cases with respect to inclusions of finite index. Further details will be provided in a subsequent paper.
description: We withdrew the statement that all 33 maximal groups are realizable over Q. To appear in Contemp. Math
Two-Loop Superstrings in Hyperelliptic Language I: the Main Results
Creators: name: Zheng, Zhu-Jun
name: Wu, Jun-Bao
name: Zhu, Chuan-Jie
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following the new gauging fixing method of D'Hoker and Phong, we study two-loop superstrings in hyperelliptic language. By using hyperelliptic representation of genus 2 Riemann surface we derive a set of identities involving the Szegö kernel. These identities are used to prove the vanishing of the cosmological constant and the non-renormalization theorem point-wise in moduli space by doing the summation over all the 10 even spin structures. Modular invariance is maintained at every stage of the computation explicitly. The 4-particle amplitude is also computed and an explicit expression for the chiral integrand is obtained. We use this result to show that the perturbative correction to the $R^4$ term in type II superstring theories is vanishing at two loops. In this paper, a summary of the main results is presented with detailed derivations to be provided in two subsequent publications.
description: v1, LaTex file, 15 pages; v2, 17 pages, add references and minor corrections
Eusarcus metapucrolia Hara & Pinto-Da-Rocha, 2010, nom. n.
Creators: name: Hara, Marcos Ryotaro
name: Pinto-Da-Rocha, Ricardo
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Gonyleptidae
Eusarcus
Eusarcus metapucrolia

description: Eusarcus metapucrolia nom. n., species inquirenda
 Pucrolia armata Sørensen 1895: 4 (types in MZT, not examined). Although Kury (2003a) mentioned the existence of a paratype in the SMF, such material could not be found in this institution upon our request.
 Metapucrolia armata: Roewer 1913: 33, fig. 10; 1923: 406 (rdesc), fig. 498; Mello-Leitão 1932: 195, fig. 105; Soares & Soares 1954b: 277 (cat); 1985: 12 (syst), figs. 13–17.
 Metapucrolia armata was synonymized with E. argentinus by Soares & Soares (1985) under dubious circumstances: (i) they assumed M. armata shows variation in armature of ocularium, femur IV and male genitalia; (ii) they did not examine any type material. The redescription provided by Roewer (1913) is not precise enough to conclude whether it is a valid species or not. The only way to decide it, is to carefully examine the type material, with an emphasis on fine details of tubercles and spines on the dorsal scutum and of apophyses on trochanter IV; apical spines of femora (especially prolateral, retrolateral and proventral rows of tubercles) and male genitalia. A replacement name is proposed to avoid secondary homonymy with E. armatus Perty 1833.
description: Published as part of Hara, Marcos Ryotaro & Pinto-Da-Rocha, Ricardo, 2010, Systematic review and cladistic analysis of the genus Eusarcus Perty 1833 (Arachnida, Opiliones, Gonyleptidae) 2698, pp. 1-136 in Zootaxa 2698 on pages 117-118
Mammalia Linnaeus 1758
Creators: name: Turienzo, Paola
name: Iorio, Osvaldo Di
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia

description: Ic. Mammalia  Mammals and/or signs of their activity (fecal pellets and food remains) were found in 10 (3.98 %) of the 251 examined nests (Table 1, Appendix II).
 Didelphis albiventris Lund, 1840 [Marsupialia: Didelphidae]
 Two previous records of Didelphis albiventris were made (Appendix Ia). Nevertheless, very probably these records were because of young opossums (an adult opossum can not enter the narrow entrance and the opossum is larger than the volume of the breeding chamber) (Fig. 4). In fact, two young opossums were found, one from Entre Ríos (ER # 1) and the second from Buenos Aires (BA # 123). In the first case, the nest in which it was living was totally clean and devoid of any material. In the second, the original bed of grasses of F. rufus was still present.
 Graomys griseoflavus (Waterhouse, 1837) [Rodentia: Muridae] (Fig. 32)
 Graomys griseoflavus is an arboreal species, previously found in stick nests of other Furnariidae birds in Argentina (Hershkovitz 1962). One nest of F. rufus from La Pampa was inhabited by three individual [MACN] of G. griseoflavus (Appendix IIc). The nest of this rodent is made with very small pieces of grasses (probably from the bed of F. rufus), mixed with a great amount of small hairs and remains of food (broken endocarps of Prosopis caldenia Burkart [Mimosaceae] in the nests from La Pampa) (Fig. 32).
Unidentified rodents
 In other cases, the rodents were not found or escaped, but their presence can be detected by fecal pellets, food remains (Appendix IIc), and/or the particular odour of the materials. Apparently, one nest of F.rufus was cleaned by the rodent because no remains of the bed of grasses were found (SF # 1). In a second case, the bed of grasses of F. rufus was covered by a layer of open endocarps of Melia azedarach L. [Meliaceae], mixed with fecal pellets (BA # 107). In a third nest, a small rodent, probably young (escaped), builds its own nest with the grasses of one abandoned nest of P. domesticus with five rotten eggs (BA # 141). In a fourth nest (BA # 171) three lactants were captured inside a nest of grasses, hairs, and yarns, recently built with the bed of F. rufus and a nest of S. f. pelzelni.
description: Published as part of Turienzo, Paola & Iorio, Osvaldo Di, 2010, Insects found in birds' nests from Argentina. Furnarius rufus (Gmelin, 1788) (Aves: Furnariidae) and their inquiline birds, the true hosts of Acanthocrios furnarii (Cordero & Vogelsang, 1928) (Hemiptera: Heteroptera: Cimicidae) 2700, pp. 1-112 in Zootaxa 2700 on pages 18-21
Sulfur, Chlorine, and Argon Abundances in Planetary Nebulae. III: Observations and Results for a Final Sample
Creators: name: Kwitter, K. B.
name: Henry, R. B. C.
name: Milingo, J. B.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper is the fourth in a series whose purpose is to study the interstellar abundances of sulfur, chlorine, and argon in the Galaxy using a sample of 86 planetary nebulae. Here we present new high-quality spectrophotometric observations of 20 Galactic planetary nebulae with spectral coverage from 3700-9600 Angstroms. A major feature of our observations throughout the entire study has been the inclusion of the near-infrared lines of [S III] 9069,9532, which allows us to calculate accurate S+2 abundances and to either improve upon or convincingly confirm results of earlier sulfur abundance studies. For each of the 20 objects here we calculate ratios of S/O, Cl/O, and Ar/O and find average values of S/O=1.1E-2+/-1.1E-2, Cl/O=4.2E-4+/-5.3E-4, and Ar/O=5.7E-3+/-4.3E-3. For six objects we are able to compare abundances of S+3 calculated directly from available [S IV] 10.5 micron measurements with those inferred indirectly from the values of the ionization correction factors for sulfur. In the final paper of the series, we will compile results from all 86 objects, search for and evaluate trends, and use chemical evolution models to interpret our results.
description: 28 pages, 2 figures. Accepted for publication in Publications of the Astronomical Society of the Pacific. See also astro-ph/0106213 for Northern sample results as well as astro-ph/0109161 for the abundance information for the Southern sample
Test particle simulations of cosmic rays
Creators: name: Mertsch, Philipp
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Modelling of cosmic ray transport and interpretation of cosmic ray data ultimately rely on a solid understanding of the interactions of charged particles with turbulent magnetic fields. The paradigm over the last 50 years has been the so-called quasi-linear theory, despite some well-known issues. In the absence of a widely accepted extension of quasi-linear theory, wave-particle interactions must also be studied in numerical simulations where the equations of motion are directly solved in a realisation of the turbulent magnetic field. The applications of such test particle simulations of cosmic rays are manifold: testing transport theories, computing parameters like diffusion coefficients or making predictions for phenomena beyond standard diffusion theories, e.g. for cosmic ray small-scale anisotropies. In this review, we seek to give a low-level introduction to test particle simulations of cosmic rays, enabling readers to perform their own test particle simulations. We start with a review of quasi-linear theory, highlighting some of its issues and suggested extensions. Next, we summarise the state-of-the-art in test particle simulations and give concrete recipes for generating synthetic turbulence. We present a couple of examples for applications of such simulations and comment on an important conceptual detail in the backtracking of particles.
description: Extended application section; matches published version; 28 pages, 7 figures; invited review for Topical Collection of Astrophysics and Space Sciences
Osbornellus eberhardi Dominguez & Godoy 2010, sp. nov.
Creators: name: Domínguez, Edwin
name: Godoy, Carolina
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Osbornellus
Osbornellus eberhardi

description: Osbornellus eberhardi Domínguez & Godoy, sp. nov.
(Figs. 16a–16e)
 Description. Length: 4.9–6.0 mm. Member of the O. auronitens group (Fig. 1a). General description as in O. trinax, with transverse white band extending below the apical band, bordered posteriorly by a short black line in form of an inverted “V”, not extending to the margins of the eyes.
 Male genitalia: Pygofer less than twice as long as width, moderately projected posteriorly, apex narrow and rounded; macrosetae long, dispersed along distal third of (Fig. 16a). Valve slightly triangular. Plates long, apex pointed and with plumose macrosetae (Fig. 16b). Style with short apophysis, slightly curved, apex rounded (Fig. 16c). Aedeagus in ventral view wide near base; shaft slender, straight, apex truncate, slightly longer than ventral processes (Fig. 16d). Ventral processes arising at distal third of aedeagal length, wide at base, tapered, apices sharp. In lateral view, shaft curved dorsad, apex truncate; dorsal projection stout, expanded to blunt tip. Gonopore apical. Ventral processes close to shaft, curved dorsad at base; apices separated, curved caudad, sharp (Fig. 16e).
 Diagnosis. Very similar to O. anonae in appearance but O. eberhardi has the aedeagus in ventral view with ventral processes straight, whereas in O. anonae they are divergent at the apices.
 Distribution. Known only from Costa Rica; 220– 560 m.
 Etymology. This species is named in honor of William Eberhard for his help given to the first author during his thesis preparation.
 Type material: Holotype, male, COSTA RICA: Limón, Reserva Biológica Hitoy Cerere, Valle de La Estrella, Sendero Espavel, 560 m, 18-IX-5-X-2003, B.Gamboa, E.Rojas & W. Arana (INBio). Paratype: COSTA RICA: Limón: 1 male, Reserva Biológica Hitoy Cerere, Sendero Espavel, 220m, 11-25-V-1998, E. Rojas (MZCR); 1 male, same locality and collector, 21-III-2003 (INBio); 1 male, same locality and collector, 2-X-2003 (INBio); 1 male, same locality and collector, 30-IX-2003 (CAS); 1 male, same locality and collector, 17-III-3-IV-2003 (INBio); 3 male, same locality and collector, 18-IX-5-X-2003 (INBio); 1 female, same locality and collector, 21-III-7-IV-1998 (INBio).
description: Published as part of Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, pp. 1-106 in Zootaxa 2702 on page 16
Investing in the water sector achievements of the past and challenges for the future
Creators: name: Malik, Ravinder Paul Singh
name: Malik, Ravinder Paul Singh
Publisher: name: Unknown
Year: 2012
Subjects: subject: Environmental Economics and Policy
subject: International Development
subject: Public Economics
subject: Water management
subject: Water resources development
subject: Economic aspects
subject: Investment
subject: India

description: Keynote speech presented at the India Water Week 2012 - Water, Energy and Food Security: Call for Solutions, New Delhi, India, 10 -14 April 2012
Reflection of two-gap nature in penetration depth measurements of MgB$_2$ film
Creators: name: Kim, Mun-Seog
name: Skinta, John A.
name: Lemberger, Thomas R.
name: Kang, W. N.
name: Kim, Hyeong-Jin
name: Choi, Eun-Mi
name: Lee, Sung-Ik
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The magnetic penetration depth, $λ^{-2}(T)$, in the basal plane of a magnesium diboride (MgB$_2$) film was measured using a two-coil mutual inductance technique at 50 kHz. This film has $T_c\simeq 38$ K, $ΔT_c \leq 1$ K, and $λ(0)\sim 1500$ Å. At low temperatures, $λ^{-2}(T)$ shows a clear exponential temperature dependence, indicating s-wave superconducting order parameter symmetry. However, the data are not quantitatively well described by theory assuming a single gap. From the data fit by the full BCS calculation assuming a double gap, the values of the two distinct gaps were obtained: $Δ_S(0)=2.61\pm0.41$ meV and $Δ_L(0)=6.50\pm0.33$ meV. The contributions of the small and the large gaps to the total superfluid density at T=0 were estimated to be 21% and 79%, respectively. Finally, we consider the effect of gap anisotropy on the penetration depth measurements, and find that the anisotropy does not play a significant role in determining the temperature dependence of the penetration depth.
description: 8 pages, 5 figures
Characterizing the boundary of the set of absolutely separable states and their generation via noisy environments
Creators: name: Halder, Saronath
name: Mal, Shiladitya
name: De, Aditi Sen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We characterize the boundary of the convex compact set of absolutely separable states, referred as {\bf AS}, that cannot be transformed to entangled states by global unitary operators, in $2\otimes d$ Hilbert space. However, we show that the absolutely separable states of rank-$(2d-1)$ are extreme points of such sets. We then discuss conditions to examine if a given full-rank absolutely separable state is an interior point or a boundary point of {\bf AS}. Moreover, we construct two-qubit absolutely separable states which are boundary points but not extreme points of {\bf AS} and prove the existence of full-rank extreme points of {\bf AS}. Properties of certain interior points are also explored. We further show that by examining the boundary of the above set, it is possible to develop an algorithm to generate the absolutely separable states which stay outside the maximal ball. By considering paradigmatic noise models, we find the amount of local noise which the input entangled states can sustain, so that the output states do not become absolutely separable. Interestingly, we report that with the decrease of entanglement of the pure input state, critical depolarizing noise value, transferring an entangled state to an absolutely separable one, increases, thereby showing advantages of sharing nonmaximally entangled states. Furthermore, when the input two-qubit states are Haar uniformly generated, we report a hierarchy among quantum channels according to the generation of absolutely separable states.
description: v1: 8 pages, 3 figures; v2: some more results added, close to published version
The anomalous production of multi-lepton and its impact on the measurement of $Wh$ production at the LHC
Creators: name: Hernandez, Yesenia
name: Kumar, Mukesh
name: Cornell, Alan S.
name: Dahbi, Salah-Eddine
name: Fang, Yaquan
name: Lieberman, Benjamin
name: Mellado, Bruce
name: Monnakgotla, Kgomotso
name: Ruan, Xifeng
name: Xin, Shuiting
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Anomalies in multi-lepton final states at the Large Hadron Collider (LHC) have been reported in Refs.~\cite{vonBuddenbrock:2017gvy,vonBuddenbrock:2019ajh}. These can be interpreted in terms of the production of a heavy boson, $H$, decaying into a Standard Model (SM) Higgs boson, $h$, and a singlet scalar, $S$, which is treated as a SM Higgs-like boson. This process would naturally affect the measurement of the $Wh$ signal strength at the LHC, where $h$ is produced in association with leptons and di-jets. Here, $h$ would be produced with lower transverse momentum, $p_{Th}$, compared to SM processes. Corners of the phase-space are fixed according to the model parameters derived in Refs.~\cite{vonBuddenbrock:2016rmr,vonBuddenbrock:2017gvy} without additional tuning, thus nullifying potential look-else-where effects or selection biases. Provided that no stringent requirements are made on $p_{Th}$ or related observables, the signal strength of $Wh$ is $μ(Wh)=2.41 \pm 0.37$. This corresponds to a deviation from the SM of $3.8σ$. This result further strengthens the need to measure with precision the SM Higgs boson couplings in $e^+e^-$, and $e^-p$ collisions, in addition to $pp$ collisions.
description: 13 pages, 1 table, 11 figures. Version accepted for publication in European Physical Journal C
Reply to "On scaling solutions with a dissipative fluid"
Creators: name: Chimento, Luis P.
name: Jakubi, Alejandro S.
name: Pavon, Diego
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we show that the claims in [Class. Quantum Grav. 19 (2002) 3067, gr-qc/0203081] related to our analysis in [Phys. Rev. D 62, 063508 (2000), astro-ph/0005070] are wrong.
description: 4 pages, uses RevTeX. v2: To appear in Class. Quantum Grav
Promotion of Lamb: Results of a Campaign In Cleveland, Ohio
Creators: name: Hunter, J. Scott
name: Clement, Wendell E.
name: Havas, Nick
name: Hunter, J. Scott
name: Clement, Wendell E.
name: Havas, Nick
Publisher: name: Unknown
Year: 1958
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods

description: Excerpts from the report: This report evaluates the consumption of lamb in relation to initial promotional efforts by the American Sheep Producers Council in Cleveland, Ohio. The October 1956 consumer survey was designed to provide the following information: 1. An appraisal of the effectiveness of the promotional campaign in attracting public attention to lamb. 2. A measure of the overall changes in the incidence and frequency of use of lamb between the time of the first survey and the time of the second. 3. An estimate of the effect of the promotion in stimulating the use of lamb among those who were aware of the campaign.
Universality of the spherical collapse with respect to the matter type : the case of a barotropic fluid with linear equation of state
Creators: name: Staelens, François
name: Rekier, Jérémy
name: Füzfa, André
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the spherical collapse of an over-density of a barotropic fluid with linear equation of state in a cosmological background. Fully relativistic simulations are performed by using the Baumgarte-Shibata-Shapiro-Nakamura formalism jointly with the Valencia formulation of the hydrodynamics. This permits us to test the universality of the critical collapse with respect to the matter type by considering the constant equation of state parameter $ω$ as a control parameter. We exhibit, for a fixed radial profile of the energy-density contrast, the existence of a critical value $ω^*$ for the equation of state parameter under which the fluctuation collapses to a black hole and above which it is diluting. It is shown numerically that the mass of the formed black hole, for subcritical solutions, obeys a scaling law $M\propto |ω- ω^*|^γ$ with a critical exponent $γ$ independent on the matter type, revealing the universality. This universal scaling law is shown to be verified in the empty Minkoswki and de Sitter space-times. For the full matter Einstein-de Sitter universe, the universality is not observed if conformally flat sub-horizon initial conditions are used. But when super-horizon initial conditions computed from the long-wavelength approximation are used, the universality appears to be true.
description: 24 pages, 19 figures
Supersymmetry in quantum mechanics with point interactions
Creators: name: Nagasawa, Tomoaki
name: Sakamoto, Makoto
name: Takenaga, Kazunori
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate supersymmetry in one-dimensional quantum mechanics with point interactions. We clarify a class of point interactions compatible with supersymmetry and present N=2 supersymmetric models on a circle with two point interactions as well as a superpotential. A hidden su(2) structure inherent in the system plays a crucial role to construct the N=2 supercharges. Spontaneous breaking of supersymmetry due to point interactions and an extension to higher N-extended supersymmetry are also discussed.
description: 12 pages, no figures. Some sections are improved and new references are added
THE OPPORTUNITY AND LIMITATIONS OF USING CHAT BOTS IN TEACHING ENGLISH CLASSES
Creators: name: Kalandarova, Safiya Tokhirovna
Publisher: name: Zenodo
Year: 2025

description: This article presents thoughts and opinions about Open AI (artificial intelligence), how to use it in English lessons, its capabilities and limitations. Moreover, in the modern world, with the development of science and technology, it is necessary to use such opportunities at the appropriate level.
Osbornellus bifurcatus Dominguez & Godoy 2010, sp. nov.
Creators: name: Domínguez, Edwin
name: Godoy, Carolina
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Osbornellus
Osbornellus bifurcatus

description: Osbornellus bifurcatus Domínguez & Godoy, sp. nov.
(Figs. 20a–20e)
 Description. Length: 6.5–7.0 mm. Member of the O. auronitens group (Fig. 1a) General description as in O. eberhardi.
 Male genitalia: Pygofer more than twice as long as greatest width, very produced posteriorly, narrow and rounded at apex; with long macrosetae dispersed along distal third (Fig. 20a). Valve oval, wide, triangular in the middle. Plates long, pointed at apex and with filamentous setae (Fig. 20b). Style with apophysis long and truncate (Fig. 20c). Aedeagus in ventral view wide at base and irregular; shaft straight, tapered, shorter than ventral processes, truncate at apex (Fig. 20d). Ventral processes arising near the base, diverging, tapered, apices pointed, directed outward. In lateral view shaft truncate, slightly curved dorsad, straight, tapered; dorsal projection truncate. Gonopore apical. Ventral processes separated from shaft, apices pointed dorsad (Fig. 20e).
 Diagnosis. Very similar to O. quirosae in appearance, but in ventral view the aedeagus of O. bifurcatus has the ventral processes separated near the base, with the apices directed outward. In O. quirosae the ventral processes are straight, parallel-sided, with the apices straight.
 Distribution. Known only from Costa Rica; 1950–2800 m.
 Etymology. This species is named for the bifurcate processes of the aedeagus.
 Type material: Holotype, male, COSTA RICA: San José, Cerro Muerte, 6 Km N San Gerardo, 2800 m, IV-1992, P. Hanson (CAS). Paratypes: COSTA RICA: Cartago: 1 male, Zona Protectora Río Navarro y Río Sombrero, La Cangreja, 1950m, I-XII-1991, P. Hanson, C. Godoy, Tp Malaise (MZCR). San José: 1 male, 2 Km W. del Empalme, 2300m, VI-1995, P. Hanson, C. Godoy (MZCR); 2 male, Cerro de la Muerte, 19 Km S. 3 Km W. Empalme, 2600m, IV-V-1993, P. Hanson, C. Godoy (MZCR, USNM); 1 female, Reserva Forestal Los Santos, 6 Km N. de San Gerardo, 2800m, IV-1992, C. Godoy, P. Hanson (MZCR).
description: Published as part of Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, pp. 1-106 in Zootaxa 2702 on page 24
Dirac and Majorana neutrino signatures of primordial black holes
Creators: name: Lunardini, Cecilia
name: Perez-Gonzalez, Yuber F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study Primordial Black Holes (PBHs) as sources of massive neutrinos via Hawking radiation. Under the hypothesis that black holes emit neutrino mass eigenstates, we describe quantitatively how the PBH evolution and lifetime is affected by the mass and fermionic -- Dirac or Majorana -- nature of neutrinos. In the case of Dirac neutrinos, PBHs radiate right-handed and left-handed neutrinos in equal amounts, thus possibly increasing the effective number of neutrino species, $N_{\rm eff}$. Assuming an initially monochromatic PBH mass spectrum, with the initial mass $M_i$ related to the particle horizon mass, and considering the current constraint on $N_{\rm eff}$, we derive a bound on the initial PBH fraction $β^\prime$ in the interval $4.3\times 10^7\ {\rm g}\lesssim M_i \lesssim 10^9$ g. Future measurements of $N_{\rm eff}$ may be able to constraint the initial fraction for black hole masses as low as 1 g. If an excess in $N_{\rm eff}$ is found, PBHs with Dirac neutrinos could provide a minimal explanation of it. For example, for $10^7\ {\rm g} \lesssim M_i\lesssim 10^9$ g and $β^\prime \gtrsim 10^{-13}$, an excess radiation at the level of $0.2\lesssim ΔN_{\rm eff}\lesssim 0.37$ is produced, which can alleviate the tension of the Hubble parameter measurements. Finally, we obtain the diffuse flux of right-helical neutrinos from PBHs at the Earth, and show that their detection in a PTOLEMY-like detector (using neutrino capture on tritium) would be difficult.
description: 24 pages, 8 figures, extended discussions, specially on massive neutrino emission; references added, minor corrections, conclusions unchanged. Matches published version
MOESM2 of Application of a computer vision technique to animal-borne video data: extraction of head movement to understand sea turtles’ visual assessment of surroundings
Creators: name: Okuyama, Junichi
name: Nakajima, Kana
name: Matsui, Kenta
name: Nakamura, Yuichi
name: Kondo, Kazuaki
name: Koizumi, Takahiro
name: Arai, Nobuaki
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: Additional file 2. The relationship between the carapace tilt angle on the sway (lateral) axis and horizontal head position. A significant relationship (y = 0.39x + 0.91, R2 = 0.13, N = 16915, F = 292, P
The Brazilian Wine Industry: a case study on geographical proximity and innovation dynamics
Creators: name: Farias, Claudio Vinicius Silva
name: Tatsch, Ana Lúcia
name: Farias, Claudio Vinicius Silva
name: Tatsch, Ana Lúcia
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: learning
subject: innovation
subject: cooperation
subject: local production systems
subject: clusters
subject: vitiviniculture

description: his paper aims to analyze the cooperation and learning processes in the local system of vitiviniculture production of Serra Gaúcha’s region (Rio Grande do Sul, Brazil), in order to characterize the dynamics of innovation of the firms located there. In methodological terms, a non-probabilistic exploratory study has been conducted. Field research in 20 wineries as well as interviews with related organizations were carried out in order to understand which learning mechanisms support innovative strategies adopted by enterprises. Since learning processes are also the result of local interactions, it was necessary to understand whether these interactions produced cooperative links . The results showed that innovations made by the firms were basically incremental. To do so, they use their intrinsic learning processes as well as external agents. These agents can be located in the region or elsewhere. The geographical proximity becomes more relevant for smaller firms. It was still possible to perceive the existence of cooperation in both vertical and horizontal level. Most frequent actions of vertical cooperation occur especially between firms and their suppliers. When horizontal cooperation occurs between enterprises, it takes place particularly in international trading.
Apresentação: Gestão e Desenvolvimento de Territórios Criativos (GDTeC) - Nucleo de Administração e Políticas Públicas (NAP2)
Creators: name: Emmendoerfer, Magnus
Publisher: name: Zenodo
Year: 2021
Subjects: Research Group
Public Management
Social Management
Public Policies
Universidades

description: Slides - Síntese da Apresentação do GDTeC/NAP2-UFV em encontro virtual online com grupos de investigação com foco em troca de saberes sobre práticas, projetos e métodos de investigação na área de Administração Pública e afins.
Osbornellus emmeni Dominguez & Godoy 2010, sp. nov.
Creators: name: Domínguez, Edwin
name: Godoy, Carolina
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Osbornellus
Osbornellus emmeni

description: Osbornellus emmeni Domínguez & Godoy, sp. nov.
(Figs. 21a–21e)
 Description. Length: 5.7 mm. Member of the O. auronitens group (Fig. 1a). General description as in O. eberhardi.
 Male genitalia: Pygofer less than twice as long as width, moderately projected posteriorly, narrow and rounded at apex; with very long macrosetae dispersed along apical half (Fig. 21a). Valve triangular. Plates very long, rounded at apex and with filamentous setae (Fig. 21b). Style with apophysis short and truncate (Fig. 21c). Aedeagus in ventral view wide basally, then slightly narrowed; shaft with apex truncate and slightly shorter than ventral processes (Fig. 21d). Ventral processes arising at one-third the length of the aedeagus, separated distally, tapered, apices sharp. Shaft in lateral view curved dorsad; dorsal projection short and truncate. Gonopore apical. Ventral processes curved dorsad, tapered, apex sharp, separated distally from shaft (Fig. 21e).
 Diagnosis. Very similar in appearance to O. barletti, but in ventral view the aedeagal shaft and ventral processes of O. emmeni are slightly curved dorsad. In O. barletti they are more curved, especially the shaft.
 Distribution. Known only from Costa Rica; 2050 m.
 Etymology. This species is named in honor of Daniel Emmen in recognition of his loan of specimens and providing laboratory facilities for the first author.
Type material: Holotype, male, COSTA RICA: Puntarenas, Coto Brus, Zona Protectora Las Tablas, Mellizas, La Quijada del Diablo. 2050 m, 13-IX-12-X-1996, L. Angulo (INBio). Paratype: COSTA RICA: 1 male, Cartago R.F. Rio Macho. Cerro de la Muerte, 3000, Mar-Abr. 1990. P.Hanson (MZCR). Malaise. 2 male, 7 female, Puntarenas, Coto Brus, Zona Protectora Las Tablas, Mellizas, La Quijada del Diablo. 2050 m, 13-IX-12-X-1996, L. Angulo (BMNH, CAS, INBio, USNM).
description: Published as part of Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, pp. 1-106 in Zootaxa 2702 on page 24
Protecting qudit operations from noise by continuous dynamical decoupling
Creators: name: Napolitano, Reginaldo de Jesus
name: Fanchini, Felipe Fernandes
name: da Silva, Adonai Hilario
name: Bellomo, Bruno
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a procedure of generalized continuous dynamical decoupling (GCDD) for an ensemble of $d$-level systems (qudits), allowing one to protect the action of an arbitrary multi-qudit gate from general noise. We first present our GCDD procedure for the case of an arbitrary qudit and apply it to the case of a Hadamard gate acting on a qutrit. This is done using a model that, in principle, could be implemented using the three magnetic hyperfine states of the ground energy level of $^{87}\mathrm{Rb}$ and laser beams whose intensities and phases are modulated according to our prescription. We show that this model allows one to generate continuously all the possible SU(3) group operations which are, in general, needed to apply the GCDD procedure. We finally show that our method can be extended to the case of an ensemble of qudits, identical or not.
description: 20 pages, 2 figures. Updated version close to the published one
MOESM1 of Application of a computer vision technique to animal-borne video data: extraction of head movement to understand sea turtlesâ visual assessment of surroundings
Creators: name: Okuyama, Junichi
name: Nakajima, Kana
name: Matsui, Kenta
name: Nakamura, Yuichi
name: Kondo, Kazuaki
name: Koizumi, Takahiro
name: Arai, Nobuaki
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology

description: Additional file 1. Attachment angle and deployment position of the logger unit on the green turtleâ s second vertebral scute.
Productivity and the Performance of Agriculture in Latin America and the Caribbean: From the Lost Decade to the Commodity Boom
Creators: name: Nin-Prat, Alejandro
name: Falconi, Cesar
name: Ludena, Carlos
name: Martel, Pedro
name: Nin-Prat, Alejandro
name: Falconi, Cesar
name: Ludena, Carlos
name: Martel, Pedro
Publisher: name: Unknown
Year: 2015
Subjects: Production Economics
Productivity Analysis

description: This study employs a growth accounting approach to analyze the performance of Latin America and the Caribbean’s agriculture between 1980 and 2012 looking at Total Factor Productivity growth and its contribution to output per worker. Our findings show that TFP in 2012 was 45 percent bigger than in 1980, reducing the difference between TFP in LAC and in OECD countries. Observed growth patterns at the country level suggest that countries that increased input per worker have increased TFP at a higher rate than countries with limited access to capital and land. As a result of these growth patterns, the improved performance in the region has increased differences in labor productivity between countries. Growing differences in labor productivity and the fact that the favorable shock in commodity prices that benefited LAC’s agriculture in recent years has apparently ran its course, raise concerns for the future.