cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multi-muon events at the Tevatron: a hidden sector from hadronic collisions
Creators: name: Barbieri, Riccardo
name: Hall, Lawrence J.
name: Rychkov, Vyacheslav S.
name: Strumia, Alessandro
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Intrigued by some features of a small but significant fraction of the multi-muon events recently published by the CDF collaboration, we show an explicit attempt to describe them in terms of a light scalar singlet $ϕ$ which communicates with the standard quarks either through a heavy scalar or a heavy fermion exchange. As suggested in arXiv:0810.7530, the singlet $ϕ$ has a chain decay into a final state made of four $τ\barτ$ pairs. We can simulate most of the muon properties of the selected sample of events. Some of these properties adhere rather well to the already published data; others should allow a decisive test of the proposed interpretation. Assuming that the test is positively passed, we show how the PAMELA excess can be fitted by the annihilation of a TeV Dark Matter particle that communicates with the Standard Model via the new light singlet(s).
description: 19 pp, v2: small changes, agrees with the published version
Electrical effects of non-uniform temperature distribution in current carrying conductors
Creators: name: Anwar, Mohammad Zahural
Publisher: name: University of British Columbia
Year: 2011

description: Anomalous electrical behaviour may appear in the d.c. and a.c. characteristics of metals or semiconductors in which the current is determined by both voltage and temperature. Theoretical investigations have been carried out by assuming different models of heat flow and the conditions for the appearance of thermal breakdown and Negative Resistance (NR) have been obtained for both metals and semi-conductors. For purely longitudinal heat flow, NR is predicted for metals while for semi-conductors, the d.c. characteristic is of the "breakdown" type without NR. On the other hand, the radial heat flow model predicts NR for semi-conductors and the conductivity modulation due to the radial temperature distribution causes a concentration of current-density along the axis, giving rise to the "thermal pinch" effect. For metals, this model does not predict NR and the resistivity modulation confines the current-density within a small depth from the surface giving rise to the "thermal skin effect". NR is also predicted for the model considering longitudinal heat flow with surface heat loss, the d.c. λ-K thermal theory, in semi-conductors whereas for metals, the theory does not predict NR. For the applicability of the λ-K thermal theory, the specimen must be thin enough to ensure an isothermal cross-section. The a.c. impedance of the specimen with a small a.c. voltage superimposed on the d.c. bias has been obtained for the λ-K thermal theory. Theoretical analysis shows that a non-zero surface loss parameter λ is essential for attaining NR in semiconductors. Experiments were performed with metals and semiconductors in an attempt to check the d.c. and a.c. λ-K thermal theories. Comparison of the experiments with the theory shows that for semi-conductors, the λ-K thermal theory is valid for current-density J ≤20 amps.cm-² while for metals, it is valid for J ≤5 x 10⁴ amps.cm-². The measured a.c. characteristics at both low and high frequencies are interpreted on the basis of the a.c. λ-K thermal theory but over the intermediate frequency region, the theory offers no explanation for the "circular arc" locus of impedances observed experimentally for both metals and semi-conductors. The present investigation enables one to determine the character of heat flow from measurements of the electrical characteristics of the specimen and also to distinguish the thermal effects which may be present in other experiments (e.g. on the "magnetic pinch").
The effect of temporal variation in experimental noise exposure on swimming and foraging behaviour of captive zebrafish
Creators: name: Sabet, Saeed Shafiei
name:  Yik Yaw   Neo
name: Slabbekoorn, Hans
Publisher: name: F1000 Research Limited
Year: 2019

description: Here we investigated the impact of temporal variation in experimental noise exposure on zebrafish (Danio rerio) foraging on waterfleas (Daphnia magna).
Global non-axisymmetric perturbation configurations in a composite disc system with an isopedic magnetic field: relation between dark matter halo and magnetic field
Creators: name: Xiang-Gruess, M.
name: Lou, Y. -Q.
name: Duschl, W. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study global non-axisymmetric stationary perturbations of aligned and unaligned logarithmic spiral configurations in an axisymmetric composite differentially rotating disc system of scale-free stellar and isopedically magnetized gas discs coupled by gravity. The gas disc is threaded across by a vertical magnetic field $B_z$ with a constant dimensionless isopedic ratio $λ\equiv 2π\sqrt{G} Σ^{(g)}/B_z$ of surface gas mass density $Σ^{(g)}$ to $B_z$ with $G$ being the gravitational constant. Our exploration focuses on the relation between $λ$ and the dark matter amount represented by a ratio $f\equiv\barΦ/Φ$ in order to sustain stationary perturbation configurations, where $\barΦ$ is the gravitational potential of a presumed axisymmetric halo of dark matter and $Φ$ is the gravitational potential of the composite disc matter. High and low $λ$ values correspond to relatively weak and strong magnetic fields given the same gas surface mass density, respectively. The main goal of our model analysis is to reveal the relation between isopedic magnetic fields and dark matter halo in spiral galaxies with globally stationary perturbation configurations. Our results show that, fairly strong yet realistic magnetic fields require a considerably larger amount of dark matter in aligned and unaligned cases than weak or moderate magnetic field strengths. We discuss astrophysical and cosmological implications of our findings. For examples, patterns and pattern speeds of galaxies may change during the course of galactic evolution. Multiple-armed galaxies may be more numerous in the early Universe. Flocculent galaxies may represent the transitional phase of pattern variations in galaxies.
description: 21 pages, 5 figures, accepted for publication in MNRAS
Schweizer Kunst online
Creators: name: Oberli, Matthias
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: SIK-ISEA bietet mit seinem Rechercheportal eine neue und innovative Online-Plattform zur Schweizer Kunst und Kunstgeschichte.
description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
title: Predator exposure early in life shapes behavioral development and individual variation in a clonal fish
Creators: name: Scherer, U.
name: Laskowski, K. L.
name: Kressler, M. M.
name: Ehlman, S. M.
name: Wolf, M.
name: Bierbach, D.
Publisher: name: Humboldt-Universität zu Berlin
Year: 2024
Subjects: subject: Behavioural ecology
subject: Ecology
subject: FOS: Biological sciences
subject: Freshwater ecology
subject: 500 Naturwissenschaften und Mathematik
subject: 600 Technik und Technologie

description: Predation risk is one of the most important factors generating behavioral differences among populations. In addition, recent attention focusses on predation as a potential driver of patterns of individual behavioral variation within prey populations. Previous studies provide mixed results, reporting either increased or decreased among-individual variation in response to risk. Here, we take an explicit developmental approach to documenting how among-individual variation develops over time in response to predator exposure, controlling for both genetic and experiential differences among individuals. We reared juveniles of naturally clonal Amazon mollies, Poecilia formosa , either with or without a predator visible during feedings over 4 weeks and analyzed activity during feedings, time spent feeding and number of visits to the feeding spot. (I) Predator-exposed fish did not differ from control fish in average feeding behavior, but they were less active during feeding trials. (II) In the absence of the predator, substantial changes in among-individual variation over time were detected: among-individual differences in feeding duration increased whereas differences in activity decreased, but there were no changes in feeder visits. In contrast, in the presence of a predator, among-individual variation in all three behaviors was stable over time and often lower compared to control conditions. Our work suggests that predation risk may have an overall stabilizing effect on the development of individual variation and that differences in predation risk may well lead to population-wide differences in among-individual behavioral variation.
Semi-empirical calculation of quenching factors for ions in scintillators
Creators: name: Tretyak, V. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Semi-empirical method of calculation of quenching factors for scintillators is described. It is based on classical Birks formula with the total stopping powers for electrons and ions which are calculated with the ESTAR and SRIM codes, respectively. Method has only one fitting parameter (the Birks factor kB) which can have different values for the same material in different conditions of measurements and data treatment. A hypothesis is used that, once the kB value is obtained by fitting data for particles of one kind and in some energy region (e.g. for a few MeV alpha particles from internal contamination of a detector), it can be applied to calculate quenching factors for particles of another kind and for another energies (e.g. for low energy nuclear recoils) if all data are measured in the same experimental conditions and are treated in the same way. Applicability of the method is demonstrated on many examples including materials with different mechanisms of scintillation: organic scintillators (solid C8H8, and liquid C16H18, C9H12); crystal scintillators (pure CdWO4, PbWO4, ZnWO4, CaWO4, CeF3, and doped CaF2(Eu), CsI(Tl), CsI(Na), NaI(Tl)); liquid noble gases (LXe). Estimations of quenching factors for nuclear recoils are also given for some scintillators where experimental data are absent (CdWO4, PbWO4, CeF3, Bi4Ge3O12, LiF, ZnSe).
description: 32 pages; accepted in Astropart. Phys
Census 2020 and UDVL: mapthecount.org maps and data visualization
Creators: name: Carlson, Kyler
name: Massey, Dean
name: Rozhkov, Anton
name: Jaeyong Shin
name: Ahoura Zandiatashbar
name: Zellner, Moira
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: 80505 Web Technologies (excl. Web Search)
subject: FOS: Computer and information sciences

description: Archive of mapthecount.org, a website created for the State of Illinois Department of Human Services to assist with state-sponsored outreach for the 2020 census. This folder only includes pages and resources related to mapping of data; other pages from the site are in a separate folder.
Félix Vallottons Handschrift als Illustrator
Creators: name: Burkhalter, Sarah
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: Félix Vallotton, Maler, Druckgrafiker, Zeichner, Schriftsteller und Kunstkritiker, verdankt seine Berühmtheit auch den mehr als 1000 Illustrationen für Zeitschriften und Bücher, die er 1890–1900 schuf.
description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
Improved orbit predictions using two-line elements
Creators: name: Levit, Creon
name: Marshall, William
Publisher: name: arXiv
Year: 2010
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The density of orbital space debris constitutes an increasing environmental challenge. There are three ways to alleviate the problem: debris mitigation, debris removal and collision avoidance. This paper addresses collision avoidance, by describing a method that contributes to achieving a requisite increase in orbit prediction accuracy. Batch least-squares differential correction is applied to the publicly available two-line element (TLE) catalog of space objects. Using a high-precision numerical propagator, we fit an orbit to state vectors derived from successive TLEs. We then propagate the fitted orbit further forward in time. These predictions are compared to precision ephemeris data derived from the International Laser Ranging Service (ILRS) for several satellites, including objects in the congested sun-synchronous orbital region. The method leads to a predicted range error that increases at a typical rate of 100 meters per day, approximately a 10-fold improvement over TLE's propagated with their associated analytic propagator (SGP4). Corresponding improvements for debris trajectories could potentially provide initial conjunction analysis sufficiently accurate for an operationally viable collision avoidance system. We discuss additional optimization and the computational requirements for applying all-on-all conjunction analysis to the whole TLE catalog, present and near future. Finally, we outline a scheme for debris-debris collision avoidance that may become practicable given these developments.
description: Submitted to Advances in Space Research. 13 pages, 4 figures
Dank
Creators: name: Redaktion, Die
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: Die Subventionen der öffentlichen Hand bilden zusammen mit den Beiträgen des Vereins zur Förderung von SIK-ISEA und den Dienstleistungserträgen die finanzielle Basis des Instituts.
description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
Some Remarks on Methods of QCD Analysis of Polarized DIS Data
Creators: name: Leader, Elliot
name: Sidorov, Aleksander V.
name: Stamenov, Dimiter B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The results on polarized parton densities (PDFs) obtained using different methods of QCD analysis of the present polarized DIS data are discussed. Their dependence on the method used in the analysis, accounting or not for the kinematic and dynamic 1/Q^2 corrections to spin structure function g_1, is demonstrated. It is pointed out that the precise data in the preasymptotic region require a more careful matching of the QCD predictions to the data in this region in order to determine the polarized PDFs correctly.
description: 14 pages, 8 figures
schwieriges Jahr, und doch ertragreich
Creators: name: Fayet, Roger
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: SIK-ISEA präsentiert umfassendes Wissen zur Kunst in der Schweiz. Dank neuen Recherchetools wird es noch besser greifbar.
description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
Konstanz und Veränderung
Creators: name: Grüninger, Harold
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: Auch unter den besonderen Bedingungen der Covid-19-Pandemie war 2020 ein produktives Jahr. Wichtige Vorhaben konnten realisiert und neue Wege beschritten werden.
description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
Origins of Modern Data Analysis Linked to the Beginnings and Early Development of Computer Science and Information Engineering
Creators: name: Murtagh, Fionn
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computers and Society (cs.CY)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: The history of data analysis that is addressed here is underpinned by two themes, -- those of tabular data analysis, and the analysis of collected heterogeneous data. "Exploratory data analysis" is taken as the heuristic approach that begins with data and information and seeks underlying explanation for what is observed or measured. I also cover some of the evolving context of research and applications, including scholarly publishing, technology transfer and the economic relationship of the university to society.
description: 26 pages
Magnetic space groups.
Creators: name: Guccione, Rosalia Giuseppina
Publisher: name: University of British Columbia
Year: 2011

description: Magnetic space groups (MSGs) were first introduced (under a different name) by Heesch more than 30 years ago, and a list of all of them was published by Belov, Neronova and Srairnova in 1955. However, no mathematically rigorous derivation of MSGs can be found in the existing literature, although an outline of a method for obtaining a large class of MSGs was published by Zaraorzaev in 1957. In this thesis a systematic rigorous method for constructing MSGs is described in detail, and a proof that the method in fact gives all the MSGs is presented. The method also leads in a natural way to a classification of MSGs which is useful for a systematic study of the arrangements of spins in ferromagnetic, ferrimagnetic and antiferromagnetic crystals. The first and the last chapter of the thesis deal with the physical aspects of the problem, the remaining chapters with purely mathematical aspects of it.
Titelei
Creators: name: Redaktion, Die
Publisher: name: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft
Year: 2022

description: Jahresbericht SIK-ISEA / Schweizerisches Institut für Kunstwissenschaft, 2021: Jahresbericht 2020 SIK-ISEA
Ph.D. Thesis: Quantum Field Theory and Gravity in Causal Sets
Creators: name: Sverdlov, Roman
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This is is a copy of dissertation that I have submitted in defense of my ph.d. thesis, with some minor changes that I have made since then. The goal of the project is to generalize matter fields and their Lagrangians from regular space time to causal sets.
description: 211 pages, no figures
Oxygen isotopes in geology.
Creators: name: Bottinga, Jan
Publisher: name: University of British Columbia
Year: 2011

description: A critical survey has been conducted on the research done in oxygen isotopes. Only those aspects are considered which are of interest to the earth scientists. Oxygen isotopes have been used for geothermometric purposes and for rock genesis problems. The physical principles underlying these two lines of research are stressed. Assumptions which are usually implied are explicitly stated. It is shown that the influence of pressure on the equilibrium constant of oxygen isotope exchange reactions is only a minor one in comparison with the temperature influence. The significance of determined temperatures is discussed in the light of possible oxygen diffusion in silicates and carbonates. It is concluded that diffusion is usually neglected without justification. As far as data are available it is shown that diffusion can be responsible for many discrepancies between oxygen isotope temperatures and' temperatures derived by other means. Studies on the origin of rocks by means of oxygen isotopes are discussed. Attention is focussed on the Southern Californian batholith. The results of Taylor and Epstein's preliminary study of this batholith are interpreted here as evidence in favour of a metamorphic origin of this huge rock body.
Fermi Large Area Telescope First Source Catalog
Creators: name: LAT Collaboration
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), during the first 11 months of the science phase of the mission, which began on 2008 August 4. The First Fermi-LAT catalog (1FGL) contains 1451 sources detected and characterized in the 100 MeV to 100 GeV range. Source detection was based on the average flux over the 11-month period, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4 sigma. The 1FGL catalog includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and power-law spectral fits as well as flux measurements in 5 energy bands for each source. In addition, monthly light curves are provided. Using a protocol defined before launch we have tested for several populations of gamma-ray sources among the sources in the catalog. For individual LAT-detected sources we provide firm identifications or plausible associations with sources in other astronomical catalogs. Identifications are based on correlated variability with counterparts at other wavelengths, or on spin or orbital periodicity. For the catalogs and association criteria that we have selected, 630 of the sources are unassociated. Care was taken to characterize the sensitivity of the results to the model of interstellar diffuse gamma-ray emission used to model the bright foreground, with the result that 161 sources at low Galactic latitudes and toward bright local interstellar clouds are flagged as having properties that are strongly dependent on the model or as potentially being due to incorrectly modeled structure in the Galactic diffuse emission.
description: 88 pages, 22 figures, submitted to Astrophysical Journal Supplement Series. The 1FGL catalog is available at http://fermi.gsfc.nasa.gov/ssc/data/access/lat/1yr_catalog/
The two-loop MHV amplitudes in N=4 supersymmetric Yang-Mills theory
Creators: name: Vergu, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the even part of the planar two-loop MHV amplitude in N=4 supersymmetric Yang-Mills theory, for an arbitrary number of external particles. The answer is expressed as a sum of conformal integrals.
AURA - A radio frequency extension to IceCube
Creators: name: Landsman, H.
name: Ruckman, L.
name: Varner, G. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The excellent radio frequency transparency of cold polar ice, combined with the coherent Cherenkov emission produced by neutrino-induced showers when viewed at wavelengths longer than a few centimeters, has spurred considerable interest in a large-scale radio-wave neutrino detector array. The AURA (Askaryan Under-ice Radio Array) experimental effort, within the IceCube collaboration, seeks to take advantage of the opportunity presented by IceCube drilling through 2010 to establish the radio frequency technology needed to achieve 100-1000 km^3 effective volumes. In the 2006-2007 Austral summer 3 deep in-ice radio frequency (RF) clusters were deployed at depths of 1300m and 300m on top of the IceCube strings. Additional 3 clusters will be deployed in the Austral summer of 2008-2009. Verification and calibration results from the current deployed clusters are presented, and the detector design and performances are discussed. Augmentation of IceCube with large-scale 1000km^3sr radio and acoustic arrays would extend the physics reach of IceCube into the EeV-ZeV regime and offer substantial technological redundancy.
description: To appear in the proceedings of the Acoustic and Radio EeV Neutrino detection Activities (ARENA) 2008 conference
Spectroscopic orbits and variations of RS Oph
Creators: name: Brandi, E.
name: Quiroga, C.
name: Mikolajewska, J.
name: Ferrer, O. E.
name: Garcia, L. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The aims of our study are to improve the orbital elements of the giant and to derive the spectroscopic orbit for the white dwarf companion. Spectral variations related to the 2006 outburst are also studied. The spectroscopic orbits have been obtained by measuring the radial velocities of the cool component absorption lines and the broad Halpha emission wings, which seem to be associated with the hot component. A set of cF-type absorption lines were also analyzed for a possible connection with the hot component motion. A new period of 453.6 days and a mass ratio, q=M_g/M_h=0.59 were determined. Assuming a massive white dwarf as the hot component, M_h= 1.2-1.4 M_{\odot}, the red giant mass is M_g= 0.68-0.80 M_{\odot} and the orbit inclination, i = 49-52^{\circ}. The cF-type lines are not associated with either binary component, and are most likely formed in the material streaming towards the hot component. We also confirm the presence of the LiI doublet in RS Oph and its radial velocities fit very well the M-giant radial velocity curve. Regardless of the mechanism involved to produce lithium, its origin is most likely from within the cool giant rather than material captured by the giant at the time of the nova explosion. In April 2006 most of the emission lines present a broad pedestal with a strong and narrow component at about -20 km/s and two other extended emission components at -200 and +150 km/s. These components could originate in a bipolar gas outflow supporting the model of a bipolar shock-heated shell expanding through the cool component wind perpendicularly to the binary orbital plane.
description: 12 pages, 10 figures, 4 tables. Astronomy & Astrophysics (accepted)
Outer commutator words are uniformly concise
Creators: name: Fernández-Alcober, Gustavo A.
name: Morigi, Marta
Publisher: name: arXiv
Year: 2009
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F10; 12L10

description: We prove that outer commutator words are uniformly concise, i.e. if an outer commutator word w takes m different values in a group G, then the order of the verbal subgroup w(G) is bounded by a function depending only on m and not on w or G. This is obtained as a consequence of a structure theorem for the subgroup w(G), which is valid if G is soluble, and without assuming that w takes finitely many values in G. More precisely, there is an abelian series of w(G), such that every section of the series can be generated by values of w all of whose powers are also values of w in that section. For the proof of this latter result, we introduce a new representation of outer commutator words by means of binary trees, and we use the structure of the trees to set up an appropriate induction.
Regulation Simulation
Creators: name: Maymin, Philip
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: A deterministic trading strategy by a representative investor on a single market asset, which generates complex and realistic returns with its first four moments similar to the empirical values of European stock indices, is used to simulate the effects of financial regulation that either pricks bubbles, props up crashes, or both. The results suggest that regulation makes the market process appear more Gaussian and less complex, with the difference more pronounced for more frequent intervention, though particular periods can be worse than the non-regulated version, and that pricking bubbles and propping up crashes are not symmetrical.
Density scaling in viscous liquids: From relaxation times to four-point susceptibilities
Creators: name: Coslovich, D.
name: Roland, C. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present numerical calculations of a four-point dynamic susceptibility, chi_4(t), for the Kob-Andersen Lennard-Jones mixture as a function of temperature T and density rho. Over a relevant range of T and rho, the full t-dependence of chi_4(t) and thus the maximum in chi_4(t), which is proportional to the dynamic correlation volume, are invariant for state points for which the scaling variable rho^gamma/T is constant. The value of the material constant gamma is the same as that which superposes the relaxation time, tau, of the system versus rho^gamma/T. Thus, the dynamic correlation volume is directly related to tau for any thermodynamic condition in the regime where density scaling holds. Finally, we examine the conditions under which the density scaling properties are related to the existence of strong correlations between pressure and energy fluctuations.
description: 5 pages, 4 figures, updated references
The Hazards of Propping Up: Bubbles and Chaos
Creators: name: Maymin, Philip
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Finance (q-fin.GN)
subject: Portfolio Management (q-fin.PM)
subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business

description: In the current environment of financial distress, many governments are likely to soon become major holders of financial assets, but the policy debate focuses only on the likelihood and extent of short-term market stabilization. This paper shows that government intervention and propping up are likely to lead to long-term bubbles and even wildly chaotic behavior. The discontinuities occur when the committed capital reaches a critical amount that depends on just two parameters: the market impact of trading and the target exposure percentage.
Effects of fish density on growth and condition factor of grass carp, Ctenopharyngodon idella cultivated in earthen ponds
Creators: name: Tahir, Majid Mahmood
Publisher: name: figshare
Year: 2021
Subjects: subject: 70201 Animal Breeding
subject: FOS: Animal and dairy science

description: The current experiment was conducted in Al- Hartha District, about 16 km northeastern Basrah Governorate, during the period 28th February to 26th June 2020. earthen ponds of the Agricultural Research Station, referring to Aquaculture Unit- Agriculture College- Basrah University, were used to investigate the effects of fish density on growth criteria and condition factor for grass carp, Ctenopharyngodon idella. The fish were cultivated in six earthen ponds (600 m2 for each one) using three different stocking densities (T1-250 fish in ponds 1 and 2; T2- 500 fish in ponds 3 and 4 and T3- 750 fish in ponds 5 and 6). The range of fish weight at the beginning of the experiment was 19-203 g, while the range of total length was 12.8-27.0 cm. Fish were fed daily using commercial pellets manufactured by Agricultural Consultant Office belonging to Agriculture College (fishmeal 20%, soybean meal 20%, wheat flour 35%, wheat bran 23%, and vitamin-minerals premix 2%). Results of the current experiment revealed that the best growth and lowest feed conversion rate achieved by fish reared in T1. The length-weight relationship proved a negative allometric growth pattern for grass carp cultivated in all stocking densities (b=2.9702, 2.8140, and 2.7414 for T1, T2, and T3, respectively). The results showed that the increase of modified condition factor (Kb= 1.15-2.72) with increasing stocking densities, while there was no difference in the range of relative condition factor (Kn= 1.00-1.02) and Fulton’s condition factor (K= 1.06-1.20).
Infrared absorption lines in boron-doped silicon.
Creators: name: Colbow, Konrad
Publisher: name: University of British Columbia
Year: 2011

description: In boron-doped silicon, optical absorption takes place through the excitation of bound holes from the ground state to excited states. This leads to a line spectrum. Due to a lack of sufficient resolution and a failure to make proper allowance for line distortion by the finite spectrometer slit width previous authors gave a misleading picture of the low temperature half-width, the temperature dependence of this half-width, and the onset of concentration broadening at low temperatures. New experimental data are explained by introducing the mechanism of statistical Stark broadening due to ionised impurities, and by modifying Baltensperger's (1953) theory for concentration broadening. At low impurity concentration the width is attributed to phonon broadening (Barrie and Nishikawa 1962) and internal strains (Kohn 1957).
Binarity of Transit Host Stars - Implications on Planetary Parameters
Creators: name: Daemgen, S.
name: Hormuth, F.
name: Brandner, W.
name: Bergfors, C.
name: Janson, M.
name: Hippler, S.
name: Henning, Th.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters. Discovering a transit host star to be multiple leads to a necessary revision of the derived stellar and planetary parameters. Based on our observations of 14 transiting exoplanet hosts, we derive parameters of the individual components of three transit host stars (WASP-2, TrES-2, and TrES-4) which we detected to be binaries. Two of these have not been known to be multiple before. Parameters of the corresponding exoplanets are revised. High-resolution "Lucky Imaging" with AstraLux at the 2.2m Calar Alto telescope provided near diffraction limited images in i' and z' passbands. These results have been combined with existing planetary data in order to recalibrate planetary attributes. Despite the faintness (delta mag ~ 4) of the discovered stellar companions to TrES-2, TrES-4, and WASP-2, light-curve deduced parameters change by up to more than 1sigma. We discuss a possible relation between binary separation and planetary properties, which - if confirmed - could hint at the influence of binarity on the planet formation process.
description: 9 pages, 3 Figures. Accepted by A&A
The photodisintegration of He3.
Creators: name: Robertson, Lyle Purmal
Publisher: name: University of British Columbia
Year: 2011

description: The cross section for the photodisintegration of a three body nucleus, helium-3, has been accurately measured for the first time. The He³( ɣ,p)D reaction cross section has been measured at gamma ray energies of 6.14, 6.97 and 7.08 Mev and found to be 0.104 ± .007, 0.298 ± .050 and 0.308±.024 milli-barns respectively. The photodisintegration cross section agrees with that calculated from the D(p,ɣ)He³ reaction using the principle of detailed balance to within the experimental errors. This is an accurate verification of this principle as applied to a direct nuclear-photon interaction. The photodisintegration reaction was observed in a cylindrical gridded ionization chamber using a helium-3, methane, and argon gas mixture. The F¹⁹(p, αɣ)016 reactions at proton bombarding energies of 873.5 kev and 935 kev were used as the source of gamma rays of well defined energy. The energy resolution of the chamber was adequately good to give a reasonable separation of the 642 kev photodisintegration reaction product peak from the electron background and the 765 kev peak from the He³(n,p)T reaction. It was necessary to reduce the tritium contamination in the helium-3 gas in order to reduce the background arising from the beta decay of the tritium; purification to less than 1 part tritium in 10¹⁰ parts helium was achieved. Proposed measurements of the photodisintegration cross section at higher gamma ray energies using ionization chambers and other types of detectors are discussed.
Interference Assisted Secret Communication
Creators: name: Tang, Xiaojun
name: Liu, Ruoheng
name: Spasojevic, Predrag
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Wireless communication is susceptible to eavesdropping attacks because of its broadcast nature. This paper illustrates how interference can be used to counter eavesdropping and assist secrecy. In particular, a wire-tap channel with a helping interferer (WT-HI) is considered. Here, a transmitter sends a confidential message to its intended receiver in the presence of a passive eavesdropper and with the help of an independent interferer. The interferer, which does not know the confidential message, helps in ensuring the secrecy of the message by sending an independent signal. An achievable secrecy rate and several computable outer bounds on the secrecy capacity of the WT-HI are given for both discrete memoryless and Gaussian channels.
description: submitted to IEEE Transactions on Information Theory
Effects of depolarizing quantum channels on BB84 and SARG04 quantum cryptography protocols
Creators: name: Jeong, Youn-Chang
name: Kim, Yong-Su
name: Kim, Yoon-Ho
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report experimental studies on the effect of the depolarizing quantum channel on weak-pulse BB84 and SARG04 quantum cryptography. The experimental results show that, in real world conditions in which channel depolarization cannot be ignored, BB84 should perform better than SARG04.
description: 4 pages, 4 figures
Mosu nujiang Miller, Griswold & Yin 2009, sp. n.
Creators: name: Miller, Jeremy
name: Griswold, Charles
name: Yin, Chang
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Mysmenidae
Mosu
Mosu nujiang

description: Mosu nujiang Miller, Griswold & Yin, sp. n. urn:lsid:zoobank.org:act: 354C0C81-05C6-4394-A50B-2751253C09B6 Figs 43 F-G, 100 Material Examined. Holotype: CHINA: Yunnan: Fugong Co., Pee He, 40 km S Shangpa, SW of R., 26.54323°N, 98.89837°E, 1153 m, 23 August 2005, sifting bamboo litter at cliff base, P. Paquin, PP-4905 (CASENT 9020484, HNU), 1 ♀. Paratype: [same data as holotype] (CASENT 9020485, CAS), 1 ♀; [same data as holotype] (CASENT 9020483, HNU), 1 ♀, 2 juvs; Fugong Co., Lishadi, 5 km N Shangpa (Fungong), SW of river, 26.96025°N, 98.86606°E, 1247 m, 26 August 2005, sifting deciduous litter at base of rock cliffs, P. Paquin, PP-5305 (CASENT 9022532, CAS), 1 ♀, 1 juv; Fugong Co., 4.5 km N Aludi Village, 22.1 km N Fugong, at stream entering NuJiang, 26.10829°N, 98.87162°E, 1263 m, 22 April 2004, C. Griswold, CGY05 (CASENT 9020715, CAS), 1 ♀. Etymology. Named for the Nujiang or Nu River, also known as the Saalween. This species was never found far from this major river. The epithet is a noun in apposition. Diagnosis. Distinguished from M. huogou by the shape of the spermathecae, bulbous in M. nujiang (Fig. 43G), transversely ovoid in M. huogou (Fig. 43I), by the contact between the membranous copulatory ducts in the posteromedial region (Fig. 43G; separated in M. huogou, Fig. 43I), and by the presence of a posterior abdominal tubercle in M. nujiang, absent in M. huogou. Description. Carapace tan with dusky markings. Sternum tan with three dark arks, two anterolaterally, one posteriorly. Legs tan, darker distally on tibiae, metatarsi, and tarsi. Abdomen medium gray with tan and white spots, with chevron pattern between posterior tubercle and spinnerets. Vulva: Spermathecae bulbous, copulatory duct adjacent to spermathecae as sclerotized as spermathecae. Fertilization ducts run anteromesally. Membranous copulatory ducts in posteriomedian region touching (Fig. 43G). Female (CASENT 9022532): Total length 0.95, carapace 0.37 long, 0.36 wide, clypeus 0.08, sternum 0.24 long, 0.25 wide, coxa IV separated by 2.17 times their width. Macrosetae: Leg I: patella d1, tibia d1; Leg II: patella d1, tibia d1; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.31; TmII: 0.29; TmIII: 0.36. Leg measurements: see Appendix A. Male unknown.
description: Published as part of Miller, Jeremy, Griswold, Charles & Yin, Chang, 2009, The symphytognathoid spiders of the Gaoligongshan, Yunnan, China (Araneae: Araneoidea): Systematics and diversity of micro-orbweavers, pp. 9-195 in ZooKeys 11 (11) on pages 52-53, DOI: 10.3897/zookeys.11.160, http://zenodo.org/record/576459
Optimized Geometric Design Proposal to Reduce Delay and Improve Safety at Irregular Local Intersections
Creators: name: zare sefat, sajjad
name: Mohammadian Yazdi, Pouria
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 400599
subject: Civil engineering not elsewhere classified

description: The rapid growth of urbanization and unsustainable transport development has led to increased travel time within urban road networks, primarily due to delays at intersections. This study focuses on an irregular intersection in Tehran, proposing several geometric design scenarios to improve both efficiency and safety. Using AIMSUN traffic simulation software, multiple design alternatives were modeled and evaluated based on traffic performance indicators. Results suggest that in low traffic volumes, roundabout designs perform better, while in high volumes, channelized intersection designs yield superior results in terms of delay reduction and safety enhancement.
Renormalized behavior and proximity to a magnetic quantum critical point in BaCo$_2$As$_2$
Creators: name: Sefat, A. S.
name: Singh, D. J.
name: Jin, R.
name: McGuire, M. A.
name: Sales, B. C.
name: Mandrus, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report synthesis and single crystal measurements of magnetic, transport and thermal properties of single crystalline BaCo$_2$As$_2$ as well as first principles calculations of the electronic structure and magnetic behavior. These results show that BaCo$_2$As$_2$ is a highly renormalized paramagnet in proximity to a quantum critical point, presumably of ferromagnetic character and that BaFeNiAs$_2$ behaves similarly. These results are discussed in relation to the properties of Ba(Fe,Co)$_2$As$_2$ and Ba(Fe,Ni)$_2$As$_2$, which are superconducting for low Co and Ni concentrations.
Fiji Flag Change: Social Media Responds
Creators: name: Tarai, Jope
name: Finau, Glen
name: Kant, Romitesh
name: Titifanue, Jason
Publisher: name: Canberra, ACT : Coral Bell School of Asia Pacific Affairs, College of Asia and the Pacific, The Australian National University
Year: 2015

description: This In Brief seeks to discuss and assess the public social media responses from the two main social media sites that were publicised by the Fijian government, for public feedback on the flag change proposal.
LoCoLotive: In silico mining for low‐copy nuclear loci based on target capture probe sets and arbitrary reference genomes
Creators: name: Lautenschlager, Ulrich
name: Scheunert, Agnes
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: low‐copy loci, marker mining, nuclear marker, probe kit, single‐copy loci, target capture, target enrichment
subject: 500 Naturwissenschaften
subject: 570 Biowissenschaften, Biologie
subject: 580 Pflanzen (Botanik)

description: Premise
Universal target enrichment probe kits are used to circumvent the individual identification of loci suitable for phylogenetic studies in a given taxon. Under certain circumstances, however, target capture can be inefficient and costly, and lower numbers of marker loci may be sufficient. We therefore propose a computational pipeline that enables the easy identification of a subset of promising candidate loci for a taxon of interest.
Methods and Results
Target sequences used for probe design are filtered based on an assembled reference genome, resulting in presumably intron-containing single-copy loci as present in the reference taxon. The applicability of the proposed approach is demonstrated based on two probe kits (universal and family-specific) in combination with several publicly available reference genomes.
Conclusions
Guided by commercial probe kits, LoCoLotive enables fast and cost-efficient marker mining. Its accuracy mainly depends on the quality of the reference genome and its relatedness to the taxa under study.
An alpha tagged X-ray source for the calibration of space borne X-ray detectors
Creators: name: Rao, A. R.
name: Naik, Sachindra
name: Patil, Milind
name: Malkar, J. P.
name: Kumar, R. P. S. Kalyan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Calibration of X-ray detectors is very important to understand the performance characteristics of the detectors and their variation with time and changing operational conditions. This enables the most accurate translation of the measurements to absolute and relative values of the incident X-ray photon energy so that physical models of the source emission can be tested. It is a general practice to put a known X-ray source (radio active source) in the detector housing for the calibration purpose. This, however, increases the background. Tagging the calibration source with the signal from a simultaneously emitted charge particle (like alpha particle) can identify the X-ray event used for calibration. Here in this paper, we present a new design for an alpha-tagged X-ray source using Am^241 radio active source and describe its performance characteristics. Its application for the upcoming Astrosat satellite is also discussed.
description: 6 Pages, 6 Figures, Accepted for publication in Nuclear Inst. and Methods in Physics Research, A
Experimental studies of B10(d,n)C11.
Creators: name: Rupaal, Ajit Singh
Publisher: name: University of British Columbia
Year: 2011

description: An experimental study of the low lying excited states of C¹¹ has been made using the B¹⁰(d ,nɣ )C¹¹ reaction at a deuteron bombarding energy of 0.8 Mev. Measurements were made of the n- ɣangular correlations of the ground state gamma transitions from the 6.49 and 4.32 Mev levels, and of the gamma ray branching ratios of the 6.49, 4.81 and 4.32 Mev levels. The apparatus used for the measurements was a combination of a NaI(T1) gamma ray spectrometer and an improved fast neutron time-of-flight spectrometer, developed by the author. Theoretical analysis of the n-ɣ angular correlations showed that the 6.49 Mev and 4.32 Mev levels are formed by the capture of p½ protons This restricts the Jπ values of these levels to (5/2)¯ or (7/2)¯. The parities of the states observed in this experiment are all known to be negative from the high energy stripping data of Cerineo and Maslin et al. A comparison of the experimental branching ratios with the theoretical branching ratios predicted by the intermediate coupling shell model is consistent with the following spin and parity assignments in C¹¹ : g.s. (3/2)¯, 2.00 Mev (1/2)¯, 4.32 Mev (5/2)¯, 4.81 Mev (3/2*)¯ and 6.49 Mev (7/2)¯. These assignments are in agreement with other recent results. The correspondence of these levels in C¹¹ with those of B¹¹ is consistent with the hypothesis of the charge independence of nuclear forces. The experimental results agree in some cases and disagree in others with the intermediate coupling shell model calculations of Kurath.