cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Molecular responses of genetically modified maize to abiotic stresses as determined through proteomic and metabolomic analyses
Creators: name: Benevenuto, Rafael Fonseca
name: Agapito-Tenfen, Sarah Zanon
name: Vilperte, Vinicius
name: Wikmark, Odd-Gunnar
name: Van Rensburg, Peet Jansen
name: Nodari, Rubens Onofre
Publisher: name: San Francisco, CA : Public Library of Science
Year: 2017
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)

description: Some genetically modified (GM) plants have transgenes that confer tolerance to abiotic stressors. Meanwhile, other transgenes may interact with abiotic stressors, causing pleiotropic effects that will affect the plant physiology. Thus, physiological alteration might have an impact on the product safety. However, routine risk assessment (RA) analyses do not evaluate the response of GM plants exposed to different environmental conditions. Therefore, we here present a proteome profile of herbicide-tolerant maize, including the levels of phytohormones and related compounds, compared to its near-isogenic non-GM variety under drought and herbicide stresses. Twenty differentially abundant proteins were detected between GM and non-GM hybrids under different water deficiency conditions and herbicide sprays. Pathway enrichment analysis showed that most of these proteins are assigned to energetic/carbohydrate metabolic processes. Among phytohormones and related compounds, different levels of ABA, CA, JA, MeJA and SA were detected in the maize varieties and stress conditions analysed. In pathway and proteome analyses, environment was found to be the major source of variation followed by the genetic transformation factor. Nonetheless, differences were detected in the levels of JA, MeJA and CA and in the abundance of 11 proteins when comparing the GM plant and its non-GM near-isogenic variety under the same environmental conditions. Thus, these findings do support molecular studies in GM plants Risk Assessment analyses.
Bayesian test of normality versus a Dirichlet process mixture alternative
Creators: name: Tokdar, Surya T.
name: Martin, Ryan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We propose a Bayesian test of normality for univariate or multivariate data against alternative nonparametric models characterized by Dirichlet process mixture distributions. The alternative models are based on the principles of embedding and predictive matching. They can be interpreted to offer random granulation of a normal distribution into a mixture of normals with mixture components occupying a smaller volume the farther they are from the distribution center. A scalar parametrization based on latent clustering is used to cover an entire spectrum of separation between the normal distributions and the alternative models. An efficient sequential importance sampler is developed to calculate Bayes factors. Simulations indicate the proposed test can detect non-normality without favoring the nonparametric alternative when normality holds.
description: 24 pages, 5 figures, 1 table
Towards a Taxonomy of Performance Evaluation of Commercial Cloud Services
Creators: name: Li, Zheng
name: O'Brien, Liam
name: Cai, Rainbow
name: Zhang, He
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Cloud Computing, as one of the most promising computing paradigms, has become increasingly accepted in industry. Numerous commercial providers have started to supply public Cloud services, and corresponding performance evaluation is then inevitably required for Cloud provider selection or cost-benefit analysis. Unfortunately, inaccurate and confusing evaluation implementations can be often seen in the context of commercial Cloud Computing, which could severely interfere and spoil evaluation-related comprehension and communication. This paper introduces a taxonomy to help profile and standardize the details of performance evaluation of commercial Cloud services. Through a systematic literature review, we constructed the taxonomy along two dimensions by arranging the atomic elements of Cloud-related performance evaluation. As such, this proposed taxonomy can be employed both to analyze existing evaluation practices through decomposition into elements and to design new experiments through composing elements for evaluating performance of commercial Cloud services. Moreover, through smooth expansion, we can continually adapt this taxonomy to the more general area of evaluation of Cloud Computing.
description: 8 pages, Proceedings of the 5th International Conference on Cloud Computing (IEEE CLOUD 2012), pp. 344-351, Honolulu, Hawaii, USA, June 24-29, 2012
Defects, Super-Poincaré line bundle and Fermionic T-duality
Creators: name: Elitzur, Shmuel
name: Karni, Boaz
name: Rabinovici, Eliezer
name: Sarkissian, Gor
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Topological defects are interfaces joining two conformal field theories, for which the energy momentum tensor is continuous across the interface. A class of the topological defects is provided by the interfaces separating two bulk systems each described by its own Lagrangian, where the two descriptions are related by a discrete symmetry. In this paper we elaborate on the cases in which the discrete symmetry is a bosonic or a fermionic T- duality. We review how the equations of motion imposed by the defect encode the general bosonic T- duality transformations for toroidal compactifications. We generalize this analysis in some detail to the case of topological defects allowed in coset CFTs, in particular to those cosets where the gauged group is either an axial or vector U(1). This is discussed in both the operator and Lagrangian approaches. We proceed to construct a defect encoding a fermionic T-duality. We show that the fermionic T-duality is implemented by the Super-Poincaré line bundle. The observation that the exponent of the gauge invariant flux on a defect is a kernel of the Fourier-Mukai transform of the Ramond-Ramond fields, is generalized to a fermionic T-duality. This is done via a fiberwise integration on supermanifolds.
description: 41 pages
Swift J1644+57 gone MAD: the case for dynamically-important magnetic flux threading the black hole in a jetted tidal disruption event
Creators: name: Tchekhovskoy, Alexander
name: Metzger, Brian D.
name: Giannios, Dimitrios
name: Kelley, Luke Zoltan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The unusual transient Swift J1644+57 likely resulted from a collimated relativistic jet powered by accretion onto a massive black hole (BH) following the tidal disruption (TD) of a star. Several mysteries cloud the interpretation of this event: (1) extreme flaring and `plateau' shape of the X-ray/gamma-ray light curve during the first 10 days after the gamma-ray trigger; (2) unexpected rebrightening of the forward shock radio emission months after trigger; (3) no obvious evidence for jet precession, despite misalignment typically expected between the angular momentum of the accretion disk and BH; (4) recent abrupt shut-off in jet X-ray emission after 1.5 years. Here we show that all of these seemingly disparate mysteries are naturally resolved by one assumption: the presence of strong magnetic flux Phi threading the BH. Initially, Phi is weak relative to high fall-back mass accretion rate, Mdot, and the disk and jets precess about the BH axis = our line of sight. As Mdot drops, Phi becomes dynamically important and leads to a magnetically-arrested disk (MAD). MAD naturally aligns disk and jet axis along the BH spin axis, but only after a violent rearrangement phase (jet wobbling). This explains the erratic light curve at early times and the lack of precession at later times. We use our model for Swift J1644+57 to constrain BH and disrupted star properties, finding that a solar-mass main sequence star disrupted by a relatively low mass, M~10^5-10^6 Msun, BH is consistent with the data, while a WD disruption (though still possible) is disfavored. The magnetic flux required to power Swift J1644+57 is too large to be supplied by the star itself, but it could be collected from a quiescent `fossil' accretion disk present in the galactic nucleus prior to the TD. The presence (lack of) of such a fossil disk could be a deciding factor in what TD events are accompanied by powerful jets.[abridged]
description: Submitted to MNRAS. 15 pages, 9 figures, uses mn2e.cls. Adjusted margins for clarity when printed
Defects, Non-abelian T-duality, and the Fourier-Mukai transform of the Ramond-Ramond fields
Creators: name: Gevorgyan, Eva
name: Sarkissian, Gor
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct topological defects generating non-abelian T-duality for isometry groups acting without isotropy. We find that these defects are given by line bundles on the correspondence space with curvature which can be considered as a non-abelian generalization of the curvature of the Poincarè bundle. We show that the defect equations of motion encode the non-abelian T-duality transformation. The Fourier-Mukai transform of the Ramond-Ramond fields generated by the gauge invariant flux of these defects is studied. We show that it provides elegant and compact way of computation of the transformation of the Ramond-Ramond fields under the non-abelian T-duality.
description: 18 pages, minor typos corrected, references added
Giant anisotropy of zeeman splitting of quantum confined acceptors in Si/Ge
Creators: name: Haendel, K.-M.
name: Winkler, R.
name: Denker, U.
name: Schmidt, O.G.
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Physical Society
Year: 2006
Subjects: subject: Biaxial strain
subject: Giant anisotropy
subject: Resonant-tunneling spectroscopy
subject: Zeeman splitting
subject: Electron tunneling
subject: Heterojunctions
subject: Magnetic anisotropy
subject: Magnetic fields
subject: Resonance
subject: Semiconducting germanium
subject: Semiconducting silicon
subject: Spectroscopic analysis
subject: Semiconductor quantum wells
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Shallow acceptor levels in Si/Ge/Si quantum well heterostructures are characterized by resonant-tunneling spectroscopy in the presence of high magnetic fields. In a perpendicular magnetic field we observe a linear Zeeman splitting of the acceptor levels. In an in-plane field, on the other hand, the Zeeman splitting is strongly suppressed. This anisotropic Zeeman splitting is shown to be a consequence of the huge light-hole-heavy-hole splitting caused by a large biaxial strain and a strong quantum confinement in the Ge quantum well. © 2006 The American Physical Society.
Quantum expanders and growth of group representations
Creators: name: Pisier, Gilles
Publisher: name: arXiv
Year: 2015
Subjects: subject: Operator Algebras (math.OA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Let $π$ be a finite dimensional unitary representation of a group $G$ with a generating symmetric $n$-element set $S\subset G$. Fix $\vp>0$. Assume that the spectrum of $|S|^{-1}\sum_{s\in S} π(s) \otimes \overline{π(s)}$ is included in $ [-1, 1-\vp]$ (so there is a spectral gap $\ge \vp$). Let $r'_N(π)$ be the number of distinct irreducible representations of dimension $\le N$ that appear in $π$. Then let $R_{n,\vp}'(N)=\sup r'_N(π)$ where the supremum runs over all $π$ with ${n,\vp}$ fixed. We prove that there are positive constants $δ_\vp$ and $c_\vp$ such that, for all sufficiently large integer $n$ (i.e. $n\ge n_0$ with $n_0$ depending on $\vp$) and for all $N\ge 1$, we have $\exp{δ_\vp nN^2} \le R'_{n,\vp}(N)\le \exp{c_\vp nN^2}$. The same bounds hold if, in $r'_N(π)$, we count only the number of distinct irreducible representations of dimension exactly $= N$.
description: Main addition: A remark due to Martin Kassabov showing that the numbers R(N) grow faster than polynomial. v3: Minor clarifications
Simulation of a steel-aluminum composite material subjected to rolling contact fatigue
Creators: name: Hwang, Jae-Il
name: Coors, Timm
name: Pape, Florian
name: Poll, Gerhard
Publisher: name: Basel : MDPI
Year: 2019
Subjects: subject: tailored forming
subject: rolling contact fatigue
subject: hybrid bearing
subject: bearing bushing
subject: fatigue life calculation
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Rolling bearings are frequently used machine elements in mechanical assemblies to connect rotating parts. Resource efficiency and reliability enhancement are considered to be important factors of rolling bearing development. One of the ways to meet these requirements is the tailored forming (TF) technology, which enables the functionalization of several metal layer composites in a single component. The so-called hybrid machine elements can be produced by co-extrusion of aluminum and steel and subsequent die forging, heat treatment, and machining. The TF rolling bearings made by this process can provide optimized characteristics that use aluminum to reduce weight and steel for a highly loaded contact zone between a rolling element and a bearing raceway. To evaluate the applicability and the potential of this technology, theoretical investigations are presented in this paper. The stress distribution under fully flooded conditions, caused by an external load in the contact between a rolling element and the TF outer ring of an angular contact ball bearing, is analyzed statically with the finite element method. The fatigue life of the TF component can be calculated for different external axial loads and manufacturing parameters, such as steel-to-aluminum volume ratios and osculation. As a damage model, the Ioannides and Harris fatigue model and the Dang Van multiaxial fatigue criterion were used. The results show that the fatigue life has high sensitivity to the steel-to-aluminum volume ratio. For the hybrid component with a steel layer thickness of 3 mm, 90 percent of the fatigue life of pure 100Cr6 steel bearing bushings is reached. In this FE model, residual stresses due to machining processes can be regarded as an initial state, which can increase the fatigue life of this TF machine component. © 2019 by the authors.
Arrenurus (Arrenurus) kimberleyensis Smit 2002
Creators: name: Smit, Harry
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Arrenuridae
Arrenurus
Arrenurus kimberleyensis

description: Arrenurus (Arrenurus) kimberleyensis Smit, 2002
 Material examined. Queensland. 1/0/0, Fitzroy River, 15 March 1983, leg. A.P. Mackay; 1/1/0, Emu Creek at Clancy’s Camping Area, Benarkin State Forest, 26° 58.334 S 152° 0 9.916 E, 3 November 2005; 0/2/0, Rock pool Porcupine Creek, Porcupine Gorge NP, 20° 21.039 S 144° 27.852 E, 23 October 2005.
 Distribution. Western Australia, and here reported for the first time from Queensland.
description: Published as part of Smit, Harry, 2010, Australian Arrenurus (Acari, Hydrachnidia) with the description of eleven new species, pp. 1-26 in Zootaxa 2541 on page 5, DOI: 10.5281/zenodo.196693
Luzula campestris Becherer, 1956, s. str.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. campestris (L.) DC. Ssp. vulgaris (Gaudin) Buchenau (L. campestris DC. s. str.) Cat. 357. Var. Althii (Herbich) A. et G.- l: Le Cergneux (Closuit); ob Collonges (Gams). 3: Mont-Chemin (Closuit). Versus var. debilis Velen. - l: Cornettes de Bise (Briquet). Var. vallesiaca Beauverd - 3: Zeneggen (Beauverd). Ssp. multiflora (Retz.) Hartman (L. multiflora Lej.) Cat. 357 und 432. l: Salanfe (Coquoz). - 3: Valsorey (Guyot); Val de Zinal (Sulger); Törbel (Stehler); Almagell (A. Keller); Saas-Fee (idem). Var. pallens A. et G. - l: Les Combasses bei Salvan (Coquoz); Le Trétien (idem).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Inertial sensing with quantum gases: a comparative performance study of condensed versus thermal sources for atom interferometry
Creators: name: Hensel, T.
name: Loriani, S.
name: Schubert, C.
name: Fitzek, F.
name: Abend, S.
name: Ahlers, H.
name: Siemß, J.-N.
name: Hammerer, K.
name: Rasel, E.M.
name: Gaaloul, N.
Publisher: name: Berlin ; Heidelberg : Springer
Year: 2021
Subjects: subject: Earth (planet)
subject: Interferometers
subject: Atom interferometer
subject: Comparative performance
subject: Electromagnetic forces
subject: Equivalence principles
subject: Fine structure constants
subject: Fundamental constants
subject: Large momentum transfers
subject: Statistical effects
subject: Interferometry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Abstract: Quantum sensors based on light pulse atom interferometers allow for measurements of inertial and electromagnetic forces such as the accurate determination of fundamental constants as the fine structure constant or testing foundational laws of modern physics as the equivalence principle. These schemes unfold their full performance when large interrogation times and/or large momentum transfer can be implemented. In this article, we demonstrate how interferometry can benefit from the use of Bose–Einstein condensed sources when the state of the art is challenged. We contrast systematic and statistical effects induced by Bose–Einstein condensed sources with thermal sources in three exemplary science cases of Earth- and space-based sensors. Graphic abstract: [Figure not available: see fulltext.] © 2021, The Author(s).
On uniformly bounded orthonormal Sidon systems
Creators: name: Pisier, Gilles
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 43A46, 47A56, 22D10

description: In answer to a question raised recently by Bourgain and Lewko, we show, with their paper's terminology, that any uniformly bounded $ψ_2 (C)$-orthonormal system ($ψ_2 (C)$ is a variant of subGaussian)is 2-fold tensor Sidon. This sharpens their result that it is 5-fold tensor Sidon. The proof is somewhat reminiscent of the author's original one for (Abelian) group characters, based on ideas due to Drury and Rider. However, we use Talagrand's majorizing measure theorem in place of Fernique's metric entropy lower bound. We also show that a uniformly bounded orthonormal system is randomly Sidon iff it is 4-fold tensor Sidon, or equivalently $k$-fold tensor Sidon for some (or all) $k\ge 4$. Various generalizations are presented, including the case of random matrices, for systems analogous to the Peter-Weyl decomposition for compact non-Abelian groups. In the latter setting we also include a new proof of Rider's unpublished result that randomly Sidon sets are Sidon, which implies that the union of two Sidon sets is Sidon.
description: v3: randomly Sidon implies four-fold tensor Sidon. v6: preceding is extended to matrix valued case, also an illustrative-hopefully illuminating-example is presented. Terminolgy is improved
Development of an Agent-Based Transport Model for the City of Hanover Using Empirical Mobility Data and Data Fusion
Creators: name: Bienzeisler, Lasse
name: Lelke, Torben
name: Wage, Oskar
name: Thiel, Falco
name: Friedrich, Bernhard
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2020
Subjects: subject: MATSim
subject: Scenario Generation
subject: Geo-spatial data
subject: Konferenzschrift
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::380 | Handel, Kommunikation, Verkehr

description: The model presented in this work is based on the agent-based simulation framework MATSim. We describe a new approach for collecting and processing the underlying data required for the development of a MATSim scenario. In cooperation with the administration of Hanover, available data was centrally collected, analysed and clustered. Using data fusion, the dataset was combined and enriched with additional information from open data sources in order to improve the model's level of detail. In combination with the German mobility survey Mobilität in Deutschland 2017, the developed model is specifically adapted for the regional characteristics of Hanover, but yet transferable to other scenarios. © 2020 The Authors. Published by Elsevier B.V.
Magnetoresistance induced by rare strong scatterers in a high-mobility two-dimensional electron gas
Creators: name: Bockhorn, L.
name: Gornyi, I.V.
name: Schuh, D.
name: Reichl, C.
name: Wegscheider, W.
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Physical Society
Year: 2014
Subjects: subject: Magnetoresistance
subject: magnetic fields
subject: 2DEG
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We observe a strong negative magnetoresistance at nonquantizing magnetic fields in a high-mobility two-dimensional electron gas. This strong negative magnetoresistance consists of a narrow peak around zero magnetic field and a huge magnetoresistance at larger fields. The peak shows parabolic magnetic field dependence and is attributed to the interplay of smooth disorder and rare strong scatterers. We identify the rare strong scatterers as macroscopic defects in the material and determine their density from the peak curvature. © 2014 American Physical Society.
A real-time QKD system based on FPGA
Creators: name: Zhang, Hong-fei
name: Wang, Jian
name: Cui, Ke
name: Luo, Chun-li
name: Lin, Sheng-zhao
name: Zhou, Lei
name: Liang, Hao
name: Chen, Teng-yun
name: Chen, Kai
name: Pan, Jian-wei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: A real-time Quantum Key Distribution System is developed in this paper. In the system, based on the feature of Field Programmable Gate Array (FPGA), secure key extraction control and algorithm have been optimally designed to perform sifting, error correction and privacy amplification altogether in real-time. In the QKD experiment information synchronization mechanism and high-speed classic data channel are designed to ensure the steady operation of the system. Decoy state and synchronous laser light source are used in the system, while the length of optical fiber between Alice and Bob is 20 km. With photons repetition frequency of 20 MHz, the final key rate could reach 17 kbps. Smooth and robust operation is verified with 6-hour continuous test and associated with encrypted voice communication test.
description: 7 pages, 14 figures
Acoustic sensors for automated detection of cow vocalization duration and type
Creators: name: Shorten, Paul
name: Hunter, Laura
Publisher: name: AgResearch
Year: 2023
Subjects: Agricultural, veterinary and food sciences

description: Acoustic technologies provide a non-invasive method to generate information about cow vocalization. This study demonstrated that collar attached acoustic sensors can differentiate between cow vocalization and background sounds obtained from cows under grazing conditions. The overall accuracy of the vocalization classification model was 99.5% in the test dataset, based on a total of 709 vocalization recordings from 10 cows. Vocalization samples were obtained from 10 trial cows, with a frequency that ranged from 3 to 452 vocalizations per cow. Algorithms were also developed to differentiate between three different cow vocalization classes (Open mouth, Closed mouth, Mixed mouth (Closed mouth followed by Open mouth)), with a model accuracy of 85% in the test dataset. Most cows demonstrated all three types of vocalization, and the between-cow variability in the probability of mixed vocalization per vocalization had a standard deviation of 0.13 relative an average probability of 0.74. The duration of the 709 individual vocalizations ranged from 0.88 to 3.37s, with an average of 1.76s and a standard deviation of 0.36s. There was a between-cow variation in the duration of vocalization, with a standard deviation of 0.12 ± 0.04s (P < 0.01). The performance of the model for the duration of vocalization had a coefficient of determination of R2 = 0.84 in the test dataset. Models to predict the proportion of a vocalization that is a closed vocalization had a coefficient of determination of R2 = 0.72 in the test dataset. The proportion of a mixed vocalization that is a closed vocalization ranged from 0.04 to 0.92 and had an average of 0.38 and a standard deviation of 0.15. There was also between-cow variation in the proportion of a mixed vocalization that is a closed vocalization, with a standard deviation of 0.08 ± 0.023 (P < 0.01). The mixed vocalization had an acoustic spectral and temporal pattern that was unique to the cow that generated the vocalization, and classification models for voice recognition had an accuracy of 80% in the test dataset. A prototype spectral unmixing algorithm was also developed to use the ensemble of cow-collar acoustic recordings from each cow to assign each cow vocalization to the cow that generated the vocalization. This study demonstrated that there is significant between-cow variability in cow vocalization traits, and that these traits can be determined using cow-attached acoustic sensors to provide information on the welfare and state of the animal.
Stress-state dependent fracture characterisation and modelling of an AZ31 magnesium sheet alloy at elevated temperatures
Creators: name: Behrens, Bernd-Arno
name: Chugreev, Alexander
name: Dykiert, Matthäus
Publisher: name: Amsterdam : Elsevier
Year: 2019
Subjects: subject: Magnesium sheet alloy AZ31
subject: Fracture characterisation
subject: Modified Mohr-Coulomb
subject: Butterfly specimen
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Due to a high specific strength, magnesium alloys have a high potential to be considered for lightweight solutions in automotive industry. For the numerical design of forming processes, it is important to describe the yielding as well as the fracture behaviour of a material as precisely as possible. In order to fully characterise the fracture behaviour of an AZ31 magnesium sheet alloy at elevated temperatures, a heated test setup for uniaxial tensile machines was developed. The setup allows an adjustment of the load application angle whereby a stress variation is achieved in the centre of the specimen. In order to determine the fracture strain for different temperatures and for varying stress states, a shear stress specimen (also known as butterfly specimen) was considered to perform mechanical experiments by means of this setup. Using numerical simulations, the specific stress development and strain value in the fracture zone, which is needed to calibrate stress state fracture models, was determined for each loading angle and temperature. For this purpose, an orthotropic yield criterion CPB06, which is suitable for depiction of the particular flow behaviour of magnesium alloys (e. g. compression-tension asymmetry), was used. By this means, sufficient data for the calibration of common stress state based fracture models could be provided and the MMC- (Modified Mohr-Coulomb) fracture model was parameterised.
Measurement of collisions between rubidium atoms and optically dark rubidium ions
Creators: name: Lee, Seunghyun
name: Ravi, K.
name: Rangwala, S. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We measure the collision rate coefficient between laser cooled Rubidium (Rb) atoms in a magneto-optical trap (MOT) and optically dark Rb+ ions in an overlapping Paul trap. In such a mixture, the ions are created from the MOT atoms and allowed to accumulate in the ion trap, which results in a significant reduction in the number of steady state MOT atoms. A theoretical rate equation model is developed to describe the evolution of the MOT atom number, due to ionization and ion-atom collision, and derive an expression for the ion-atom collision rate coefficient. The loss of MOT atoms is studied systematically, by sequentially switching on the various mechanisms in the experiment. Combining the measurements with the model allows the direct determination of the ion-atom collision rate coefficient. Finally the scope of the experimental technique developed here is discussed.
description: 9 pages, 6 figures
Preserving differential privacy under finite-precision semantics
Creators: name: Gazeau, Ivan
name: Miller, Dale
name: Palamidessi, Catuscia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.8

description: The approximation introduced by finite-precision representation of continuous data can induce arbitrarily large information leaks even when the computation using exact semantics is secure. Such leakage can thus undermine design efforts aimed at protecting sensitive information. We focus here on differential privacy, an approach to privacy that emerged from the area of statistical databases and is now widely applied also in other domains. In this approach, privacy is protected by the addition of noise to a true (private) value. To date, this approach to privacy has been proved correct only in the ideal case in which computations are made using an idealized, infinite-precision semantics. In this paper, we analyze the situation at the implementation level, where the semantics is necessarily finite-precision, i.e. the representation of real numbers and the operations on them, are rounded according to some level of precision. We show that in general there are violations of the differential privacy property, and we study the conditions under which we can still guarantee a limited (but, arguably, totally acceptable) variant of the property, under only a minor degradation of the privacy level. Finally, we illustrate our results on two cases of noise-generating distributions: the standard Laplacian mechanism commonly used in differential privacy, and a bivariate version of the Laplacian recently introduced in the setting of privacy-aware geolocation.
description: In Proceedings QAPL 2013, arXiv:1306.2413
Lifetime degradation mechanism in boron-doped Czochralski silicon
Creators: name: Voronkov, Vladimir V.
name: Falster, Robert
name: Batunina, A.V.
name: MacDonald, D.
name: Bothe, Karsten
name: Schmidt, J.
Publisher: name: London : Elsevier Ltd.
Year: 2011
Subjects: subject: Boron
subject: Electron lifetime
subject: Oxygen
subject: Silicon
subject: Degradation
subject: Temperature distribution
subject: Boron concentrations
subject: Czochralski silicon
subject: Degradation parameter
subject: Interstitial boron
subject: Lifetime degradation
subject: Recombination centres
subject: Temperature dependence
subject: Hole concentration
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The recombination centre that emerges in boron- and oxygen-containing silicon was thought to be a complex of a substitutional boron atom Bs and an oxygen dimer O2. However in material co-doped with boron and phosphorus, the degradation parameters were reported to correlate with the hole concentration p rather than with the boron concentration. In the present work, the temperature dependence of the Hall Effect was measured in co-doped and reference samples and the concentrations of isolated acceptors Na and of donors Nd were deduced. The value of Na was found to be substantially larger than p and close to the expected total concentrations of boron. This result clearly shows that the reported correlation of the degradation with p implies a lack of correlation with Na. Such a behaviour is accounted for by a model based on formation of BiO 2 complexes (involving an interstitial boron atom Bi rather than Bs): the grown-in concentration of this species is proportional to p and independent of Na.
Subgaussian sequences in probability and Fourier analysis
Creators: name: Pisier, Gilles
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: This is a review on subgaussian sequences of random variables, prepared for the Mediterranean Institute for the Mathematical Sciences (MIMS). We first describe the main examples of such sequences. Then we focus on examples coming from the harmonic analysis of Fourier series and we describe the connection of subgaussian sequences of characters on the unidimensional torus (or any compact Abelian group) with Sidon sets. We explain the main combinatorial open problem concerning such subgaussian sequences. We present the answer to the analogous question for subgaussian bounded mean oscillation (BMO) sequences on the unit circle. Lastly, we describe several very recent results that provide a generalization of the preceding ones when the trigonometric system (or its analogue on a compact Abelian group) is replaced by an arbitrary orthonormal system bounded in $L_\infty$.
description: We added a short section on subgaussian BMO sequences
Measurement of Cosmic Ray Spectrum and Anisotropy with the ARGO-YBJ experiment
Creators: name: Di Sciascio, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The combined measurement of the cosmic ray (CR) energy spectrum and anisotropy in their arrival direction distribution needs the knowledge of the elemental composition of the radiation to discriminate between different origin and propagation models. Important information on the CR mass composition can be obtained studying the EAS muon content through the measurement of the CR rate at different zenith angles. In this paper we report on the observation of the anisotropy of galactic CRs at different angular scales with the ARGO-YBJ experiment. We report also on the study of the primary CR rate for different zenith angles. The light component (p+He) has been selected and its energy spectrum measured in the energy range (5 - 200) TeV for quasi-vertical events. With this analysis for the first time a ground-based measurement of the CR spectrum overlaps data obtained with direct methods for more than one energy decade, thus providing a solid anchorage to the CR spectrum measurements carried out by EAS arrays in the knee region. Finally, a preliminary study of the non-attenuated shower component at a zenith angle $θ>$ 70$^{\circ}$ (through the observation of the so-called horizantal air showers) is presented.
description: 5 pages, Talk given at the International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2012), Berlin, Germany
title: Деловые документы 30-х–50-х гг. XX в. как источник изучения топонимии Карельского Поморья.
Creators: name: Михайлова, Любовь
name: Приображенский, Андрей
Publisher: name: Новгородский печатный двор
Year: 2019

description: В статье рассматриваются акты Национального архива Карелии, которые содержат наименования пахотных, сенокосных, рыболовных угодий, пастбищ населенных пунктов Поморского и Карельского берегов Белого моря. Сопоставление архивных материалов с топографическими картами и памятниками письменности дает основание предполагать, что уже к XVI–XVII вв. территории вблизи сел Кереть и Черная Река были хорошо освоены русским
населением.
Improved parameterization of Auger recombination in silicon
Creators: name: Richter, A.
name: Werner, F.
name: Cuevas, A.
name: Schmidt, J.
name: Glunz, S.W.
Publisher: name: London : Elsevier Ltd.
Year: 2012
Subjects: subject: Aluminum oxide
subject: Auger recombination
subject: Crystalline silicon
subject: Radiative recombination
subject: Surface passivation
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Accurate modeling of the intrinsic recombination in silicon is important for device simulation as well as for interpreting measured effective carrier lifetime data. In this contribution we study the injection-dependent effective carrier lifetime applying advanced surface passivation techniques based on Al2O3 or SiNx We show that in some cases the measured lifetime data significantly exceeds the previously accepted intrinsic lifetime limit proposed by Kerr and Cuevas [1]. To verify our measurements we independently perform lifetime measurements with different measurement techniques in two different laboratories. Based on effective lifetime measurements we develop an advanced parameterization of the intrinsic lifetime in crystalline silicon at 300 K as a function of the doping density and the injection level, which accounts for Coulomb-enhanced Auger recombination and Coulomb-enhanced radiative recombination.
title: К проблеме гетерогенности ономастического ландшафта Оренбуржья
Creators: name: Бекасова, Елена
Publisher: name: Новгородский печатный двор
Year: 2019

description: На территории Оренбуржья – своеобразных евразийских ворот – многочисленными этносами были оставлены названия географических объектов, среди которых по своей значимости и сохранности в ономастическом ландшафте выделяются гидронимы. Их освоение, а также возникновение новых названий водных объектов создают особую гетерогенную систему, которая преломляется и трансформируется в разных языках. Лексико-семантические
характеристики и тематические мотивации дают основание рассматривать гидронимический ландшафт Оренбуржья как особый системный феномен.
Spectral gap properties of the unitary groups: around Rider's results on non-commutative Sidon sets
Creators: name: Pisier, Gilles
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 43A46, 47A56, 22D10

description: We present a proof of Rider's unpublished result that the union of two Sidon sets in the dual of a non-commutative compact group is Sidon, and that randomly Sidon sets are Sidon. Most likely this proof is essentially the one announced by Rider and communicated in a letter to the author around 1979 (lost by him since then). The key fact is a spectral gap property with respect to certain representations of the unitary groups $U(n)$ that holds uniformly over $n$. The proof crucially uses Weyl's character formulae. We survey the results that we obtained 30 years ago using Rider's unpublished results. Using a recent different approach valid for certain orthonormal systems of matrix valued functions, we give a new proof of the spectral gap property that is required to show that the union of two Sidon sets is Sidon. The latter proof yields a rather good quantitative estimate. Several related results are discussed with possible applications to random matrix theory.
description: v2: minor corrections, v3 more minor corrections v4) minor corrections, last section removed to be included in another paper in preparation with E. Breuillard v5) more minor corrections + two references added. The paper will appear in a volume dedicated to the memory of V. P. Havin
Range-Renewal Structure in Continued Fractions
Creators: name: Wu, Jun
name: Xie, Jian-Sheng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: Let $ω=[a_1, a_2, \cdots]$ be the infinite expansion of continued fraction for an irrational number $ω\in (0,1)$; let $R_n (ω)$ (resp. $R_{n, \, k} (ω)$, $R_{n, \, k+} (ω)$) be the number of distinct partial quotients each of which appears at least once (resp. exactly $k$ times, at least $k$ times) in the sequence $a_1, \cdots, a_n$. In this paper it is proved that for Lebesgue almost all $ω\in (0,1)$ and all $k \geq 1$, $$ \displaystyle \lim_{n \to \infty} \frac{R_n (ω)}{\sqrt{n}}=\sqrt{\fracπ{\log 2}}, \quad \lim_{n \to \infty} \frac{R_{n, \, k} (ω)}{R_n (ω)}=\frac{C_{2 k}^k}{(2k-1) \cdot 4^k}, \quad \lim_{n \to \infty} \frac{R_{n, \, k} (ω)}{R_{n, \, k+} (ω)}=\frac{1}{2k}. $$ The Hausdorff dimensions of certain level sets about $R_n$ are discussed.
A modal perspective on the transverse Anderson localization of light in disordered optical lattices
Creators: name: Karbasi, Salman
name: Koch, Karl W.
name: Mafi, Arash
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We frame the transverse Anderson localization of light in a one-dimensional disordered optical lattice in the language of localized propagating eigenmodes. The modal analysis allows us to explore localization behavior of a disordered lattice independent of the properties of the external excitation. Various localization-related phenomena, such as the periodic revival of a propagating Anderson-localized beam are easily explained in modal language. We characterize the localization strength by the average width of the guided modes and carry out a detailed analysis of localization behavior as a function of the optical and geometrical parameters of the disordered lattice. We also show that in order to obtain a minimum average mode width, the average width of the individual random sites in the disordered lattice must be larger than the wavelength of the light by approximately a factor of two or more, and the optimum site width for the maximum localization depends on the design parameters of the disordered lattice.
Arrenurus (Megaluracarus) harpagopalpus Walter 1929
Creators: name: Smit, Harry
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Arrenuridae
Arrenurus
Arrenurus harpagopalpus

description: Arrenurus (Megaluracarus) harpagopalpus Walter, 1929
 Material examined. Northern Territory. 1/1/0, Manton Dam, 12° 51.726 S 131° 0 7.148 E, 24 September 2005.
 Distribution. Northern Territory, Queensland and New South Wales. Furthermore known from Java (Indonesia).
description: Published as part of Smit, Harry, 2010, Australian Arrenurus (Acari, Hydrachnidia) with the description of eleven new species, pp. 1-26 in Zootaxa 2541 on page 10, DOI: 10.5281/zenodo.196693
A study of grease lubricants under wind turbine pitch bearing conditions
Creators: name: Schwack, Fabian
name: Bader, Norbert
name: Leckner, Johan
name: Demaille, Claire
name: Poll, Gerhard
Publisher: name: Amsterdam [u.a.] : Elsevier Science
Year: 2020
Subjects: subject: Blade bearing
subject: False brinelling
subject: Grease
subject: Pitch bearing
subject: Wear
subject: Wind energy
subject: Point contacts
subject: Wear of materials
subject: Antiwear property
subject: Bearing conditions
subject: Contact modeling
subject: Mixed lubrication
subject: Model experiments
subject: Operational conditions
subject: Pitch controller
subject: Reciprocating motion
subject: Wind turbines
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: Pitch bearings in wind turbines are affected by reciprocating motion due to pitch control. The combination of oscillating operation, high loads, and mixed lubrication often leads to wear. Grease lubricants in wind turbine pitch bearings should be designed to avoid such wear. Due to different available grease lubricants, the anti-wear properties are investigated under downscaled wind turbine pitch bearing conditions. The downscaling is accomplished by load simulation for a pitch bearing and analysis of the pitch movements for a 7.5 MW reference turbine. The operational conditions of the four point contact ball bearing with 5 m outer diameter are scaled to angular contact ball bearings of the size 7208. The investigations are concluded with contact model experiments. Six Industrial grease lubricants for wind turbine pitch bearings are tested that follow very different compositions. The investigations reveal, that none of the tested grease lubricants was able to reduce wear for all tested conditions. After 250000 cycles certain conditions lead to severe wear. Therefore, the pitch controller should avoid such conditions if possible. Nevertheless, grease lubricants with low base oil viscosities and high bleeding rates are best on average for the tested conditions. Furthermore, the results of the bearing experiments are comparable to the model experiments. © 2020
Pretzel links, mutation, and the slice-ribbon conjecture
Creators: name: Aceto, Paolo
name: Kim, Min Hoon
name: Park, JungHwan
name: Ray, Arunima
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57K40, 57K10

description: Let p and q be distinct integers greater than one. We show that the 2-component pretzel link P(p,q,-p,-q) is not slice, even though it has a ribbon mutant, by using 3-fold branched covers and an obstruction based on Donaldson's diagonalization theorem. As a consequence, we prove the slice-ribbon conjecture for 4-stranded 2-component pretzel links.
description: 14 pages, 7 figures, V2: Implements suggestions from a referee report. This version has been accepted for publication by MRL
Dual host-pathogen small RNA sequencing during wheat stem rust infection
Creators: name: Mueth, Nicholas
name: Hulbert, Scot
Publisher: name: figshare
Year: 2023
Subjects: Plant pathology
Genomics and transcriptomics

description: This repository was set up as part of a submission to the journal BMC Research Notes (see reference below). This is a high throughput small RNA sequencing dataset from bread wheat plants (Triticum aestivum) interacting with the wheat stem rust fungus (Puccinia graminis f.sp. tritici). Here you will find sequencing reads and the results of quality control analyses performed to ensure sample and data integrity. You are free to use these data with proper attribution, namely by citing the BMC Research Notes paper.