cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Observing the Minkowskian dynamics of the pion on the null-plane
Creators: name: de Paula, W.
name: Ydrefors, E.
name: Nogueira, J. H. Alvarenga
name: Frederico, T.
name: Salmè, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A dynamical model is applied to the study of the pion valence light-front wave function, obtained from the actual solution of the Bethe-Salpeter equation in Minkowski space, resorting to the Nakanishi integral representation. The kernel is simplified to a ladder approximation containing constituent quarks, an effective massive gluon exchange, and the scale of the extended quark-gluon interaction vertex. These three input parameters carry the infrared scale ΛQCD and are fine-tuned to reproduce the pion weak decay constant, within a range suggested by lattice calculations. Besides fπ, we present and discuss other interesting quantities on the null-plane, like: (i) the valence probability, (ii) the dynamical functions depending upon the longitudinal or the transverse components of the light-front (LF) momentum, represented by LF-momentum distributions and distribution amplitudes, and (iii) the probability densities both in the LF-momentum space and the 3D space given by the Cartesian product of the covariant Ioffe-time and transverse coordinates, in order to perform an analysis of the dynamical features in a complementary way. The proposed analysis of the Minkowskian dynamics inside the pion, though carried out at the initial stage, qualifies the Nakanishi integral representation as an appealing effective tool, with still unexplored potentialities to be exploited for addressing correlations between dynamics and observable properties.
description: 25 pages and 8 figures, mistypings fixed. Phys. Rev. D in press
Prien, Hans-Jürgen, Evangelische Kirchwerdung in Brasilien
Creators: name: Fischer, Joachim
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 2 (1990): Ökumenische Rundschau, Band 39, Heft 2
The broadening of Fe II lines by neutral hydrogen collisions
Creators: name: Barklem, P. S.
name: Aspelund-Johansson, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Data for the broadening of 24188 Fe II lines by collisions with neutral hydrogen atoms have been computed using the theory of Anstee & O'Mara as extended to singly ionised species and higher orbital angular momentum states by Barklem & O'Mara. Data have been computed for all Fe II lines between observed energy levels in the line lists of Kurucz with log gf > -5 for which the theory is applicable. The variable energy debt parameter Ep used in computing the second order perturbation theory potential is chosen to be consistent with the long range dispersion interaction constant C6 computed using the f-values from Kurucz.
description: Accepted for A&A. 5 pages, 5 figures, 2 electronic tables. Tables will be available via CDS; presently also at http://www.astro.uu.se/~barklem/papers/fe2_data.tar.gz
Predicted and measured glass surface temperatures in an industrial, regeneratively gas-fired flat glass furnace
Creators: name: Hayes, R. Robert
name: Wang, Jian
name: McQuay, Mardson Q.
name: Webb, Brent W.
name: Huber, Aaron M.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: This study reports optically measured glass surface temperatures along the furnace center-line in the combustion space of a sideport, 455 (metric) t/d industrial, gas-fired flat glass furnace. The measurements were made using a water-cooled two-color pyrometer inserted through holes in the crown at six locations along the length of the furnace. Both average and time-resolved glass surface temperature measurements were performed during the approximately 20 s reversal period of the furnace. The measured glass surface temperature data are supplemented by observations of the batch location using a specially designed, water-cooled video probe. The average temperatures were found to rise from a low near 1700 Κ near the batch blanket to a peak of approximately 1900 K, then drop to a level of 1800 K. Evidence of batch Islands or "logs" is observed in the surface temperature data collected at the measurement location nearest the batch blanket. Large temperature excursions are seen here, indicative of measurement alternately of both the batch surface and the molten glass. Also reported in this study are results of a numerical model for the three-dimensional melt flow and heat transfer in the tank, coupled with a batch melting model. The radiant heat flux distribution incident on the melt and batch blanket surfaces is assumed. The melt tank model includes bubbling. The numerical predictions agree well with the timeaveraged glass surface temperature data collected experimentally The measurements and model predictions illustrate the complex transport phenomena in the melting section of the furnace.
Character Formulae and Partition Functions in Higher Dimensional Conformal Field Theory
Creators: name: Dolan, F. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A discussion of character formulae for positive energy unitary irreducible representations of the the conformal group is given, employing Verma modules and Weyl group reflections. Product formulae for various conformal group representations are found. These include generalisations of those found by Flato and Fronsdal for SO(3,2). In even dimensions the products for free representations split into two types depending on whether the dimension is divisible by four or not.
description: 43 pages, uses harvmac,version 2 2 references added, minor typos corrected
Influence of MoO₃ and ZrO₂ on the crystallization of fluor-mica fusion-cast ceramics
Creators: name: Penkov, Ivan
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Nucleation and crystallization behavior of fluor-mica fusion-cast ceramics has been investigated. By contrast to oxide glasses, fusioncast ceramics based on potassium or barium fluor micas display a strong tendency to volume nucleation. For some specific compositions belonging to the latter group, the addition of MoO₃ and ZrO₂ has been studied. MoO₃ was selected because it is known to promote homogeneous nucleation by lowering the surface energy difference between melt and crystals, and ZrO₂ was selected because it is a classical nucleation catalyst in many glass-ceramic Systems. It is shown that both additives substantially reduce the crystallization rates and also cause concomitant changes in the resulting ceramic microstructures. Both effects are interpretated as a consequence of increased melt viscosity. An effect of nucleus formation promoted by MoO₃ is not observed.
Spin vs. bond correlations along dangling edges of quantum critical magnets
Creators: name: Weber, Lukas
name: Wessel, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Dangling edge spins of two-dimensional quantum critical antiferromagnets display strongly enhanced spin correlations with scaling dimensions that fall outside of the classical theory of surface critical phenomena. We provide large-scale quantum Monte Carlo results for both spin and bond correlation functions for the case of the columnar dimer model in particular. Unlike the spin correlations, we find the bond correlations to differ starkly between the spin-1/2 and spin-1 case. Furthermore, we compare the corresponding scaling dimensions to recent theoretical predictions. These predictions are, in part, supported by our numerical data, but cannot explain our findings completely. Our results thus put further constraints on completing the understanding of dangling edge correlations, as well as surface phenomena in strongly-correlated quantum systems in general.
description: 5 pages, 4 figures
Warming rays in cluster cool cores
Creators: name: Colafrancesco, S.
name: Marchegiani, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a model of cosmic ray heating of clusters' cores that reproduces the observed temperature distribution in clusters by using an energy balance condition in which the emitted X-ray energy is supplied by the hadronic cosmic rays, which act as warming rays (WRs). The temperature profile of the IC gas is correlated with the WR pressure distribution and, consequently, with the non-thermal emission (radio, hard X-ray and gamma-ray) induced by the interaction of the WRs with the IC gas and magnetic field. The temperature distribution of the IC gas in both cool-core and non cool-core clusters is successfully predicted from the measured IC gas density distribution. Under this contraint, the WR model is also able to reproduce the thermal and non-thermal pressure distribution in clusters, as well as their radial entropy distribution. The WR model provides other observable features: a correlation of the pressure ratio (WRs to thermal IC gas) with the inner cluster temperature T_{inner}, a correlation of the gamma-ray luminosity with T_{inner}, a substantial number of cool-core clusters observable with the GLAST-LAT experiment, a surface brightness of radio halos in cool-core clusters that recovers the observed one, a hard X-ray emission from cool-core clusters that is systematically lower than the observed limits and yet observable with the next generation HXR experiments like Simbol-X. The specific theoretical properties and the multi-frequency distribution of the e.m. signals predicted in the WR model render it quite different from the other models proposed for the heating of clusters' cool-cores. Such differences make it possible to prove or disprove our model as an explanation of the cooling-flow problems on the basis of multi-frequency observations of galaxy clusters.
description: 19 pages, 17 figures, A&A in press
Sol-gel preparation of scratch-resistant AI₂O₃ coatings on float glass
Creators: name: Hauk, Rainer
name: Frischat, Günther Heinz
name: Ruppert, Karl
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Glass surfaces including those of automotive glazing show insufficient Scratch resistance. In order to improve this, a sol-gel process has been developed by means of which scratch-resistant and transparent corundum coatings (α-Αl₂O₃) may be deposited on glass surfaces. Coatings which were produced by using commercial boehmite(AlOOH) dispersions could also be completely transformed into α-Αl₂O₃, but they were not dense enough at about 500 nm thickness. Coatings produced by an alkoxide-gel process from aluminium butoxide were dense at a thickness of maximal 100 nm and adhered very well to the glass surface which had been slightly roughened by HF etching. Α Scratch test with a quartz grain showed that the damage of the glass surfaces coated in this way was less than 2 % compared to that of uncoated surfaces. Transmission of these coated glasses was about 90 % in the visible wavelength ränge.
Biomonitoring of Mercury Contamination at Petroleum Production Platforms in the Gulf of Thailand using Transplanted Green Mussel, Perna viridis
Creators: name: Chatree Ritthong
name: Narongsak Puanglarp
name: Somkiat Piyatiratitivorakul
name: Piamsak Menasvata
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: mercury,Perna viridis,transplanted mussel,biomonitoring

description: 1, 4, EnvironmentAsia
Phonons and d-wave pairing in the two-dimensional Hubbard model
Creators: name: Honerkamp, Carsten
name: Fu, Henry C.
name: Lee, Dung-Hai
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We analyze the influence of phonons on the d-wave pairing instability in the Hubbard model on the two-dimensional square lattice at weak to moderate interaction U, using a functional renormalization group scheme with frequency-dependent interaction vertices. As measured by the pairing scale, the B1g buckling mode enhances the pairing, while other phonon modes decrease the pairing. When various phonon modes are included together, the net effect on the scale is small. However, in situations where d-wave superconductivity and other tendencies, e.g. antiferromagnetism, are closely competing, the combined effect of different phonons may be able to tip the balance towards pairing.
description: 4 pages, 3 figures
Supplemental Information for Crates et al. 'Loss of vocal culture and fitness costs in a critically endangered songbird'
Creators: name: Crates, Ross
name: Langmore, Naomi
name: Ranjard, Louis
name: Stojanovic, Dejan
name: Rayner, Laura
name: Ingwersen, Dean
name: Heinsohn, Robert
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: 8 supplemental texts; 1 supplemental references section; 6 supplemental tables and 5 supplemental figures. Each section is outlined with relevant legend/caption in the file.
Influence of BaO/(SrO + BaO) on some thermal properties of R₂O-RO-SiO₂ glasses for plasma display panel Substrate
Creators: name: Kim, Ki-Dong
name: Hwang, Jong-Hee
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: An influence of BaO/(SrO + BaO) on some thermal properties was studied in alkali - alkaline earth - silica PDP (Plasma Display Panel) Substrate glasses. SrO was replaced progressively by BaO at fixed concentration of alkaline earth oxides. Four viscosity fixed points at low temperature, thermal expansion coefficient and density of glasses were determined. The compositional dependence of those properties was discussed from the viewpoint of the mixed alkaline earth effect and the raw material cost.
Urban Environmental Health: Respiratory Illness and Urban Factors in Kuala Lumpur City, Malaysia
Creators: name: Leh, Oliver Ling Hoon
name: Shaharuddin Ahmad
name: Kadaruddin Aiyub
name: Yaakob Mohd Jani
name: Hwa, Ting Kien
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: Acute respiratory infection (ARI),Air quality,Health,Respiratory illness,Urban

description: 1, 4, EnvironmentAsia
Search for Light Dark Matter-Electron Scatterings in the PandaX-II Experiment
Creators: name: Cheng, Chen
name: Xie, Pengwei
name: Abdukerim, Abdusalam
name: Chen, Wei
name: Chen, Xun
name: Chen, Yunhua
name: Cui, Xiangyi
name: Fan, Yingjie
name: Fang, Deqing
name: Fu, Changbo
name: Fu, Mengting
name: Geng, Lisheng
name: Giboni, Karl
name: Gu, Linhui
name: Guo, Xuyuan
name: Han, Ke
name: He, Changda
name: Huang, Di
name: Huang, Yan
name: Huang, Yanlin
name: Huang, Zhou
name: Ji, Xiangdong
name: Ju, Yonglin
name: Li, Shuaijie
name: Lin, Qing
name: Liu, Huaxuan
name: Liu, Jianglai
name: Liu, Liqiang
name: Lu, Xiaoying
name: Ma, Wenbo
name: Ma, Yugang
name: Mao, Yajun
name: Meng, Yue
name: Shaheed, Nasir
name: Ni, Kaixiang
name: Ning, Jinhua
name: Ning, Xuyang
name: Ren, Xiangxiang
name: Shang, Changsong
name: Shen, Guofang
name: Si, Lin
name: Tan, Andi
name: Wang, Anqing
name: Wang, Hongwei
name: Wang, Meng
name: Wang, Qiuhong
name: Wang, Siguang
name: Wang, Wei
name: Wang, Xiuli
name: Wang, Zhou
name: Wu, Mengmeng
name: Wu, Shiyong
name: Wu, Weihao
name: Xia, Jingkai
name: Xiao, Mengjiao
name: Xiao, Xiang
name: Yan, Binbin
name: Yang, Jijun
name: Yang, Yong
name: Yu, Chunxu
name: Yuan, Jumin
name: Yuan, Ying
name: Zeng, Xinning
name: Zhang, Dan
name: Zhang, Tao
name: Zhao, Li
name: Zheng, Qibin
name: Zhou, Jifang
name: Zhou, Ning
name: Zhou, Xiaopeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report constraints on light dark matter through its interactions with shell electrons in the PandaX-II liquid xenon detector with a total 46.9 tonne$\cdot$day exposure. To effectively search for these very low energy electron recoils, ionization-only signals are selected from the data. 1821 candidates are identified within ionization signal range between 50 to 75 photoelectrons, corresponding to a mean electronic recoil energy from 0.08 to 0.15 keV. The 90% C.L. exclusion limit on the scattering cross section between the dark matter and electron is calculated based on Poisson statistics. Under the assumption of point interaction, we provide the world's most stringent limit within the dark matter mass range from 15 to 30 $\rm MeV/c^2$, with the corresponding cross section from $2.5\times10^{-37}$ to $3.1\times10^{-38}$ cm$^2$.
description: 6 pages, 5 figures, 2 tables
1.7_Witha: The NEWA Ferry Lidar Benchmark: Comparing mesoscale models with lidar measurements along a ship route
Creators: name: Witha, Björn
name: Dörenkämper, Martin
name: Frank, Helmut
name: García-Bustamante, Elena
name: González-Rouco, Fidel
name: Navarro, Jorge
name: Schneider, Martin
name: Steeneveld, Gert-Jan
name: Svensson, Nina
name: Gottschall, Julia
Publisher: name: Zenodo
Year: 2019
Subjects: NEWA
ship lidar
mesoscale modelling
offshore wind conditions
model benchmark

description: It is common practice to evaluate mesoscale meteorological models against in-situ mast measurements of one or several met masts. With the NEWA Ferry Lidar Experiment and Benchmark conducted as part of the New European Wind Atlas (NEWA) project we further develop the concept of spatially distributed wind profile measurements. A vertically scanning Doppler lidar was placed on a ferryboat travelling on a regular route through the Southern Baltic Sea between Kiel (Germany) and Klaipeda (Lithuania). During four months between February and June 2017, the lidar continuously measured wind profiles between 65 m and 275 m above sea level along the ship track. The obtained wind profile data were corrected for ship motions (i.e. ship velocity and heading). To our knowledge this is the first dataset of wind profile measurements with lidar along such a long track. As the lidar moves with the ship and covers a distance that is comparable to a typical mesoscale model domain, this dataset is very suitable to be compared against meteorological mesoscale model data.
 In the associated modelling benchmark, participants from the international mesoscale modelling community were invited to simulate the period of the experiment with different mesoscale models and model setups. The participants were encouraged to either use their best practice setup or to test several setups. The objectives of the benchmark are: To assess how well today’s mesoscale models can reproduce the wind conditions offshore and, in particular, in the Southern Baltic Sea where quite often coastal effects are present. To compare different models as well as different model setups of the same model against the measurements. To gain experience with this unique kind of data (moving wind profiles) and explore its strengths and weaknesses. Several participants used the WRF model with different setups and forcing data but also ICON-EU operational forecasts and MM5 are participating in the benchmark. The simulated time series are compared with the measured time series in different heights, and vertical profiles are evaluated at specific locations. Furthermore, error statistics are presented.
Spin Hall effect, Hall effect and spin precession in diffusive normal metals
Creators: name: Shchelushkin, R. V.
name: Brataas, Arne
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study transport in normal metals in an external magnetic field. This system exhibits an interplay between a transverse spin imbalance (spin Hall effect) caused by the spin-orbit interaction, a Hall effect via the Lorentz force, and spin precession due to the Zeeman effect. Diffusion equations for spin and charge flow are derived. The spin and charge accumulations are computed numerically in experimentally relevant thin film geometries. The out-of-plane spin Hall potential is suppressed when the Larmor frequency is larger than the spin-flip scattering rate. The in-plane spin Hall potential vanishes at zero magnetic field and attains its maximum at a finite magnetic field before spin precession starts to dominate. Spin-injection via ferromagnetic contacts creates a transverse charge Hall effect that decays in a finite magnetic field due to spin precession.
description: 4 pages, 2 figures
Schoenborn, Ulrich (Hrsg.), Evangelisch-Lutherische Kirche in Brasilien: Nachfolge Jesu - Wege der Befreiung
Creators: name: Weinrich, Michael
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 2 (1990): Ökumenische Rundschau, Band 39, Heft 2
PM10 Distribution using Remotely Sensed Data and GIS Techniques; Klang Valley, Malaysia
Creators: name: Amanollahi, Jamil
name: Abdullah, Ahmad Makmom
name: Raheleh Farzanmanesh
name: Ramli, Mohammad Firuz
name: Saeid Pirasteh
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: GIS,MODIS,aerosol optical thickness,particulate matter,Klang valley

description: 1, 4, EnvironmentAsia
Charged Rotating Black Holes in Odd Dimensions
Creators: name: Kunz, Jutta
name: Navarro-Lerida, Francisco
name: Viebahn, Jan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider charged rotating black holes in $D=2N+1$ dimensions, $D \ge 5$. While these black holes generically possess $N$ independent angular momenta, associated with $N$ distinct planes of rotation, we here focus on black holes with equal-magnitude angular momenta. The angular dependence can then be treated explicitly, and a system of 5 $D$-dependent ordinary differential equations is obtained. We solve these equations numerically for Einstein-Maxwell theory in D=5, 7 and 9 dimensions. We discuss the global and horizon properties of these black holes, as well as their extremal limits.
description: 11 pages, 10 figures
Variational approach to relative entropies (with application to QFT)
Creators: name: Hollands, Stefan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We define a new divergence of von Neumann algebras using a variational expression that is similar in nature to Kosaki's formula for the relative entropy. Our divergence satisfies the usual desirable properties, upper bounds the sandwiched Renyi entropy and reduces to the fidelity in a limit. As an illustration, we use the formula in quantum field theory to compute our divergence between the vacuum in a bipartite system and an "orbifolded" -- in the sense of conditional expectation -- system in terms of the Jones index. We take the opportunity to point out entropic certainty relation for arbitrary von Neumann subalgebras of a factor related to the relative entropy. This certainty relation has an equivalent formulation in terms of error correcting codes.
description: 21 pages, no figures, v2: relation to error correcting codes in holography clarified (cor. 2), minor revisions, v3: revisions, mainly sec. 3
Assessment Cu, Ni and Zn Pollution in the Surface Sediments in the Southern Peninsular Malaysia using Cluster Analysis, Ratios of Geochemical Nonresistant to Resistant Fractions, and Geochemical Indices
Creators: name: Yap. C., K.
name: Wong, C. H
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2011
Subjects: heavy metals,surface sediments,geochemical indices,geochemical fractions

description: 1, 4, EnvironmentAsia
Paschen is Partially Back
Creators: name: Stift, M. J.
name: Leone, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a discussion of the partial Paschen-Back (PB) effect in magnetic Ap stars. An overview of the theory is illustrated with examples of how splittings deviate non-linearly from the simple Zeeman picture; normally forbidden ``ghost lines'' appear in strong fields. Resulting asymmetric stellar Stokes profiles for a dipolar magnetic geometry are shown for the FeII 6149 line and it is established that PB lines may be subject to wavelength shifts. Modelling of Stokes profiles in the PB regime opens exciting new diagnostics.
description: 6 pages, 3 figures
Anomaly constraint on chiral central charge of (2+1)d topological order
Creators: name: Kobayashi, Ryohei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this short paper, we argue that the chiral central charge $c_-$ of a (2+1)d topological ordered state is sometimes strongly constrained by 't Hooft anomaly of anti-unitary global symmetry. For example, if a (2+1)d fermionic TQFT has a time reversal anomaly with $T^2=(-1)^F$ labeled as $ν\in\mathbb{Z}_{16}$, the TQFT must have $c_-=1/4$ mod $1/2$ for odd $ν$, while $c_-=0$ mod $1/2$ for even $ν$. This generalizes the fact that the bosonic TQFT with $T$ anomaly in a particular class must carry $c_-=4$ mod $8$ to fermionic cases. We also study such a constraint for fermionic TQFT with $U(1)\times CT$ symmetry, which is regarded as a gapped surface of the topological superconductor in class AIII.
description: 16 pages, 2 figures, references added, accepted in Physical Review Research
Strong coupling of a qubit to shot noise
Creators: name: Hartmann, Udo
name: Wilhelm, Frank K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We perform a nonperturbative analysis of a charge qubit in a double quantum dot structure coupled to its detector. We show that strong detector-dot interaction tends to slow down and halt coherent oscillations. The transitions to a classical and a low-temperature quantum overdamping (Zeno) regime are studied. In the latter, the physics of the dissipative phase transition competes with the effective shot noise.
description: 5 pages, 4 figures
Taborda, Francisco, Sakramente
Creators: name: Sattler, Dorothea
name: Schneider, Theodor
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 39 Nr. 2 (1990): Ökumenische Rundschau, Band 39, Heft 2
stress distribution in thermally tempered glass panes near the edges, corners and holes : Part 2. Distribution of thermal stresses
Creators: name: Laufs, Wilfried
name: Sedlacek, Gerhard
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: With temperature profiles during the thermal strengthening process determined in part 1 of this paper, the distribution of thermal stresses for the central area, near the edges and holes of the glass plates are calculated numerically with the help of a fmite-elementsimulation (THERVO PRO) which models the formation of temper stresses with time. Comparison with existing experimental data for the central area (zone 1) shows very good correspondence with numerical results. For zone 2 (edge), at about a distance d away from the edge, a somewhat reduced surface compression due to membrane stresses is observed. At zone 2 and zone 3 (corner) surface compression is found parallel to the edge surfaces, since due to equilibrium requirements there is no thermally induced stress perpendicular to the surfaces. In general, near the edge and corner stress distribution is three-dimensional as well as around zone 4 (hole). The hole with a cone has a certain difference compared with a cylindrical hole: it does not have a reduction of tangential surface compression at some distance from the hole on the cone side.
The soil seed bank can buffer long-term compositional changes in annual plant communities
Creators: name: DeMalach, Niv
name: Kigel, Jaime
name: Sternberg, Marcelo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Ecological theory predicts that the soil seed bank stabilises the composition of annual plant communities in the face of environmental variability. However, long-term data on the community dynamics in the seed bank and the standing vegetation are needed to test this prediction. We tested the hypothesis that the composition of the seed bank undergoes lower temporal variability than the standing vegetation in a nine-year study in Mediterranean, semi-arid, and arid ecosystems. The composition of the seed bank was estimated by collecting soil cores from the studied sites on an annual basis. Seedling emergence under optimal watering conditions was measured in each soil core for three consecutive years, to account for seed dormancy. In all sites, the composition of the seed bank differed from the vegetation throughout the years. Small-seeded and dormant-seeded species had a higher frequency in the seed bank than in the standing vegetation. In contrast, functional group membership (grasses vs. forbs) did not explain differences in species frequency between the seed bank and the vegetation after controlling for differences between grasses and forbs in seed mass and seed dormancy. Contrary to predictions, the magnitude of year-to-year variability (the mean compositional dissimilarity between consecutive years) was not lower in the seed bank than in the vegetation in all sites. However, long-term compositional trends in the seed bank were weaker than in the vegetation in the Mediterranean and semi-arid sites. In the arid site where year-to-year variability was highest, no long-term trends were observed. Overall, the effect of the seed bank on the temporal variability of the vegetation in annual communities depends on site conditions and time scale. While the year-to-year variability of the seed bank is similar to the vegetation, the soil seed bank can buffer long-term trends.
Morphology of silica and borosilicate glass fracture surfaces by atomic force microscopy
Creators: name: Wünsche, Christine
name: Rädlein, Edda
name: Frischat, Günther Heinz
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: Fracture surfaces of Herasil (silica) and Duran (borosilicate) glass rods were examined with an atomic force microscope. Generally the roughness in the fracture surface increases with growing distance from the origin of fracture. The morphology displays a variety of features. In the smooth fracture mirror near the origin of fracture the surface consists of small hillocks ≈25 nm in diameter and ≤ 1 nm high. With growing distance these hillocks increase in size and height. In the mist zone bigger outcrops occur with steep flanks. Steps can also be discovered in the fracture surface. Parts of the surface are covered by ripples, which are proposed to result from a local melting of the glass near the crack tip during fracture.
Evaluation of Lime Stabilized Road Bed
Creators: name: Meade, Bobby W.
name: Allen, David L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1988
Subjects: subject: Transportation Engineering

description: In October 1986, the Transportation Research Program of the University of Kentucky published a report evaluating the addition of hydrated lime to the subgrade soils of Section 19 of the Ashland-Alexandria (AA.) highway (1). That study involved laboratory testing only and concluded that the engineering properties of these subgrade soils were significantly improved with the addition of 6 percent (by weight) hydrated lime. It was decided to add hydrated lime to the subgrade soils on Section 19.  Because that procedure had not previously been used in Kentucky, a study was approved to monitor construction procedures and the performance of an experimental section. The objectives were:      photo documentation and monitoring of construction procedures;     laboratory testing of subgrade samples for, freeze--thaw durability, triaxial and unconfined compressive strength, and resilient modulus;     annual pavement coring and testing as listed in Item 2; and     a construction report upon completion of construction and annual memorandum reports for five years.
Probing the impact of varied migration and gas accretion rates for the formation of giant planets in the pebble accretion scenario
Creators: name: Ndugu, Nelson
name: Bitsch, Bertram
name: Morbidelli, Alessandro
name: Crida, Aurélien
name: Jurua, Edward
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The final orbital position of growing planets is determined by their migration speed, which is essentially set by the planetary mass. Small mass planets migrate in type I migration, while more massive planets migrate in type II migration, which is thought to depend mostly on the viscous evolution rate of the disc. A planet is most vulnerable to inward migration before it reaches type II migration and can lose a significant fraction of its semi-major axis at this stage. We investigated the influence of different disc viscosities, the dynamical torque and gas accretion from within the horseshoe region as mechanisms for slowing down planet migration. Our study confirms that planets growing in low viscosity environments migrate less, due to the earlier gap opening and slower type II migration rate. We find that taking the gas accretion from the horseshoe region into account allows an earlier gap opening and this results in less inward migration of growing planets. Furthermore, this effect increases the planetary mass compared to simulations that do not take the effect of gas accretion from the horseshoe region. Moreover, combining the effect of the dynamical torque with the effect of gas accretion from the horseshoe region, significantly slows down inward migration. Taking these effects into account could allow the formation of cold Jupiters (a > 1 au) closer to the water ice line region compared to previous simulations that did not take these effects into account. We thus conclude that gas accretion from within the horseshoe region and the dynamical torque play crucial roles in shaping planetary systems.
description: 13 pages, 8 figures, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS)
Evaluation of Procedures for Testing Aggregates
Creators: name: Hunsucker, David Q.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1988
Subjects: subject: Transportation Engineering

description: This report summarizes findings of a research study conducted to evaluate aggregate testing procedures as related to aggregate soundness and durability. The objectives of the study were to determine a suitable replacement or modification of Kentucky's existing Sodium Sulfate Soundness Test for aggregates which would more accurately reflect in-service performance of concrete pavements and bridges, to correlate freezing and thawing durability data and other test data with sodium sulfate soundness data, and to develop a rational implementation criterion for use of new or modified testing procedures.  There were no observable correlations between the various test methods evaluated and the Sodium Sulfate Soundness Test for aggregate types. Continued use of the soundness test, in strict accordance with Kentucky's Standard Test Method is recommended to evaluate aggregate soundness.
Holographic Dark Energy and Present Cosmic Acceleration
Creators: name: Pavon, Diego
name: Zimdahl, Winfried
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the notion of holographic dark energy and assess its significance in the light of the well documented cosmic acceleration at the present time. We next propose a model of holographic dark energy in which the infrared cutoff is set by the Hubble scale. The model accounts for the aforesaid acceleration and, by construction, is free of the cosmic coincidence problem.
description: 6 pages. To appear in the Proceedings of the XXVIII Spanish Relativity Meeting. Key words: Cosmology, Holography, Late accelerated expansion, Dark energy
New method for measuring the friction between hot viscous glass and metals
Creators: name: Falipou, Marc
name: Sicloroff, François
name: Donnet, Christophe
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: The present study proposes a new experimental approach to quantify the shding of hot viscous glass on a Substrate material, in conditions being representative of the loading of glass gobs into forming moulds. Using a gob-loading sensor, the method consists in calculating the energy dissipated by the glass gob when crossing a feeding funnel, with a direct measurement of the velocity loss of the gob following its dynamic contact with the funnel. Experimental data combined with a mechanical modelling has been performed with two funnel geometries: a cylindrical funnel and a conical funnel. The strain dissipation energy induced by the deformation of the viscous gob inside the funnel has been first calculated. It is shown that the cylindrical funnel allows strain modes consuming four times less energy than the conical funnel, in agreement with experimental observations. Α global analysis of the motion allowing the calculation of the total energy lost by the gob during the contact with the funnel is then proposed, taking into account the previous dissipation energy calculation. Α motion equation is thus deduced, giving the velocity of the gob as a function of time, glass/gob friction coefficient and other experimental parameters. The dissipated kinetic energy is strongly influenced by the dissipated strain energy, thus influencing the value of the calculated friction coefficients. The gob-loading sensor is a powerful tool increasing knowledge in the forming of viscous materials, together with a comparison and discrimination of various materials and surface states, which may be used in the glass forming process with the aim to avoid the use of lubricant and to make the process more competitive.
Oscillator Strengths and Predissociation Rates for Rydberg Transitions in 12C16O, 13C16O, and 13C18O Involving the E 1Pi, B 1Sigma+, and W 1Pi States
Creators: name: Eidelsberg, M.
name: Sheffer, Y.
name: Federman, S. R.
name: Lemaire, J. L.
name: Fillion, J. H.
name: Rostas, F.
name: Ruiz, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the processes controlling the interstellar CO abundance and the ratio of its isotopologues is photodissociation. Accurate oscillator strengths and predissociation rates for Rydberg transitions are needed for modeling this process. We present results on absorption from the E ^1Pi-X ^1Sigma^+ (1-0) and B ^1Sigma^+-X ^1Sigma^+ (6-0) bands at 1051 and 1002 Å, respectively, and the vibrational progression W ^1Pi-X ^1Sigma^+ (v'-0) bands with v' = 0 to 3 at 972, 956, 941, and 925 Å, respectively. The corresponding spectra were acquired at the high resolution (R ~ 30,000) SU5 beam line at the Super ACO Synchrotron in Orsay, France. Spectra were obtained for the ^12C^16O, ^13C^16O, and ^13C^18O isotopologues. These represent the most complete set of measurements available. Comparison is made with earlier results, both empirical and theoretical. While earlier determinations of oscillator strengths based on absorption from synchrotron radiation tend to be somewhat smaller than ours, the suite of measurements from a variety of techniques agree for the most part considering the mutual uncertainties. For the bands studied here, their relative weakness, or their significant line widths arising from predissociation, minimizes potential problems from large optical depths at line center in absorption measurements. Predissociating line widths could generally be extracted from the spectra thanks to the profile simulations used in the analysis. In many cases, these simulations allowed us to consider e and f parity levels separately and to determine the dependence of the width on rotational quantum number, J. Our results are consistent with earlier determinations, especially the widths inferred from laser experiments.
Spin-Orbit Torques in Transition Metal Dichalcogenide/Ferromagnet Heterostructures
Creators: name: Hidding, Jan
name: Guimarães, Marcos H. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In recent years, there has been a growing interest in spin-orbit torques (SOTs) for manipulating the magnetization in nonvolatile magnetic memory devices. SOTs rely on the spin-orbit coupling of a nonmagnetic material coupled to a ferromagnetic layer to convert an applied charge current into a torque on the magnetization of the ferromagnet (FM). Transition metal dichalcogenides (TMDs) are promising candidates for generating these torques with both high charge-to-spin conversion ratios, and symmetries and directions which are efficient for magnetization manipulation. Moreover, TMDs offer a wide range of attractive properties, such as large spin-orbit coupling, high crystalline quality and diverse crystalline symmetries. Although numerous studies were published on SOTs using TMD/FM heterostructures, we lack clear understanding of the observed SOT symmetries, directions, and strengths. In order to shine some light on the differences and similarities among the works in literature, in this mini-review we compare the results for various TMD/FM devices, highlighting the experimental techniques used to fabricate the devices and to quantify the SOTs, discussing their potential effect on the interface quality and resulting SOTs. This enables us to both identify the impact of particular fabrication steps on the observed SOT symmetries and directions, and give suggestions for their underlying microscopic mechanisms. Furthermore, we highlight recent progress of the theoretical work on SOTs using TMD heterostructures and propose future research directions.
description: 14 pages, 1 figure, 1 table
Rheological properties of calcium metaphosphate melts during extrusion
Creators: name: Yue, Yuanzheng
name: Carl, Gunter
name: Rüssel, Christian
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: An extrusion method to determine viscosities is described. Here, different stages of the response on the load applied are observed and the viscous heating efFect caused by the mechanical deformation work is taken into account. The method enables the determination of viscosities in the ränge of 10⁶ to 10^(8.5) dPa s. The values obtained are in good agreement with interpolated ones determined by beam bending and cylinder rotation. During extruding of calcium metaphosphate melts, the viscositiy decreases with increasing shear rate. This shear-thinning efFect (or non-Newtonian behaviour) is attributed to the orientation of flow units of the dynamic melt network. It is found that both Newtonian and non-Newtonian flow behaviour of calcium metaphosphate melts was largely influenced by adding a small amount of SiO₂. However, the introduction of a small amount of SiO₂ into calcium metaphosphate melts is beneficial to study the flow behaviour, since by that the crystallization of melts is avoided, which hinders the continuation of extruding processes.
On the interaction of glasses with high-energy radiation - Combined ESR and optical studies
Creators: name: Nofz, Marianne
name: Reich, Christian
name: Stösser, Reinhard
name: Bartoll, Jens
name: Janata, Eberhard
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 1999
Subjects: subject: 660

description: This paper will discuss some aspects of the induced physical processes and chemical reactions which are observed when Silicate and aluminosilicate glasses are exposed to UV radiation (248 nm; excimer laser), γ radiation (⁶⁰Co) and pulses of fast electrons (3.8 MeV). The stimulated emission and absorption of short-lived defects and Čerenkov radiation are detected in the optical ränge between 200 and 800 nm and on the microsecond time scale. Stahle hole centres (Si-0⁻/h⁺, Si-O-Al/h⁺) and electron centres (among others Zn⁺, Cd⁺, (Fe³⁺)⁻) are detected by ESR spectroscopy at room temperature. They show surprising differences in regard to their thermal stability, i.e., the distribution and mean value of their trap depths. Induced absorption in the UV/VIS range exhibits broad and overlapping bands, some of which can be partially assigned to centres detected by ESR spectroscopy. Therefore, UV/VIS spectroscopy provides complementary information, an induced absorption at 300 nm for example, which has no analogy in ESR measurements.
Haemonchus contortus : A Hazard To Small Ruminant Industry
Creators: name: Ekta Yadav1, Akanksha Singhal2, Samita Saini3
Publisher: name: veterinary today
Year: 2024

description:                          Haemonchus contortus also known as Barber’s pole worm or twisted stomach worm or wire worm is the nemesis of the small ruminant sector in the tropical and subtropical region of the world. This species, prevalent in tropical and warmer temperate countries, causes the disease known as Haemonchosis. Haemonchus spp. belonging to the family Trichostrongylidae are voracious bloodsuckers occurring primarily in the abomasum of the sheep. In India, where there is a variable climate in addition to the unhygienic and malnutrition, the animals are frequently exposed to this parasite, causing Haemonchosis.  H. contortus infects mainly grazing small ruminants. This nematode, during its residence in GIT, causes high morbidity and mortality as well in sheep and goat
Intrinsic thermodynamic properties of the pyrochlore superconductor RbOs2O6 extracted by condensation energy analysis
Creators: name: Brühwiler, M.
name: Kazakov, S. M.
name: Karpinski, J.
name: Batlogg, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We develop a general procedure for the analysis of bulk thermodynamic data of a superconductor for samples containing a metallic non-superconducting second phase. The method is based on the condensation energy and it allows the extraction of the intrinsic properties of a superconductor even for non-ideal samples. Applying this procedure to the recently discovered geometrically frustrated beta-pyrochlore superconductor RbOs2O6 (Tc = 6.4 K) yields a Sommerfeld coefficient as high as 79 mu J/g/K^2 (44 mJ/mol_f.u./K^2). RbOs2O6 is inferred to be a strong type-II superconductor (kappa(Tc) = 23) in the intermediate-coupling regime similar to niobium (lambda_ep \approx 1). From the upper critical field mu_0 H_c2 \approx 6 T at 0 K, we estimate a Ginzburg-Landau coherence length xi \approx 74 AA. The condensation energy is 860 mu J/g (483 mJ/mol_f.u.) resulting in 1/(8 pi) (gamma_1 Tc^2)/DeltaU_1 \approx 0.15, a value well in the range of conventional phonon-mediated superconductors. The superconducting electronic specific heat indicates conventional s-wave pairing. The experimental Sommerfeld coefficient of 44 mJ/mol_f.u./K^2 is about 4 times larger than the one found in band structure calculations. Together with the electron-phonon coupling constant lambda_ep \approx 1 this leaves an additional lambda_add \approx 2.4 for enhancement due to other mechanisms.
description: Submitted to Physical Review B