cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Campaign like a girl? Gender and communication on social networking sites in the Czech Parliamentary election
Creators: name: Hrbková, Lenka
name: Macková, Alena
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: This study focuses on the communication styles of male and female candidates on Facebook during the 2017 parliamentary election campaign in the Czech Republic. It tests the assumption that female candidates engage in a more personal and interactive style of communication than male candidates. The Czech Republic provides a hard test of this hypothesis given that the electoral system poses weak incentives for candidates to run personal campaigns and the political culture exhibits strong gender stereotypes. We analyze the use of personalized content, technological disclosure, and interactivity in 1637 Facebook posts created by 227 candidates. The findings are in line with previous research and show that female candidates did not significantly differ from male candidates in the way they communicated on social networking sites (SNSs). The study extends our understanding of how communication styles are used in a political context. It suggests that politics presents a specific context which motivates politicians to pursue communication styles that overturn traditional stereotypes.
Static spacetimes with/without black holes in dynamical Chern-Simons gravity
Creators: name: Shiromizu, Tetsuya
name: Tanabe, Kentaro
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the static and asymptotically flat black hole spacetime is unique to be Schwarzschild spacetime in the dynamical Chern-Simons gravity. In addition, we show that the strictly static spacetimes should be the Minkowski spacetime.
description: 3 pages
Smooth Loops and Thomas Precession
Creators: name: Nesterov, Alexander I.
name: Sabinin, Lev V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: 20N05, 22E99, 51M15, 83A05

description: Fundamentals of the local smooth loops due to Sabinin are concisely outlined together with the corresponding infinitesimal objects, so-called ν-hyperalgebras, and the analogue of the Lie groups theory. We apply here this theory to to formulation of a new concept of loop of boosts. A quaternionic model of the three-parametric loop of boosts is obtained and a remarkable connection with geodesic loops of Lobachevskii space is found. A description of Thomas precession in the light of general theory of smooth loops is given.
description: 19 pages
Fisher information under decoherence in Bloch representation
Creators: name: Zhong, Wei
name: Sun, Zhe
name: Ma, Jian
name: Wang, Xiaoguang
name: Nori, Franco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The dynamics of two variants of quantum Fisher information under decoherence are investigated from a geometrical point of view. We first derive the explicit formulas of these two quantities for a single qubit in terms of the Bloch vector. Moreover, we obtain analytical results for them under three different decoherence channels, which are expressed as affine transformation matrices. Using the hierarchy equation method, we numerically study the dynamics of both the two information in a dissipative model and compare the numerical results with the analytical ones obtained by applying the rotating-wave approximation. We further express the two information quantities in terms of the Bloch vector for a qudit, by expanding the density matrix and Hermitian operators in a common set of generators of the Lie algebra $\mathfrak{su}(d)$. By calculating the dynamical quantum Fisher information, we find that the collisional dephasing significantly diminishes the precision of phase parameter with the Ramsey interferometry.
description: 16 pages, 4 figures
Mapping lunar surface chemistry: new prospects with the Chandrayaan-2 Large Area Soft x-ray Spectrometer (CLASS)
Creators: name: Narendranath, S.
name: Athiray, P. S.
name: Sreekumar, P.
name: Radhakrishnaa, V.
name: Tyagi, A.
name: Kellett, B. J.
name: team, the CLASS
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Surface chemistry of airless bodies in the solar system can be derived from remote x-ray spectral measurements from an orbiting spacecraft. X- rays from planetary surfaces are excited primarily by solar x-rays. Several experiments in the past have used this technique of x-ray fluorescence for deriving abundances of the major rock forming elements. The Chandrayaan- 2 orbiter carries an x-ray fluorescence experiment named CLASS that is designed based on results from its predecessor C1XS flown on Chandrayaan-1. We discuss the new aspects of lunar science that can be potentially achieved with CLASS.
description: 16 pages, 6 figures, Article in press in Advances in Space Research
Fits to SO(10) Grand Unified Models
Creators: name: Dueck, Alexander
name: Rodejohann, Werner
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform numerical fits of Grand Unified Models based on SO(10), using various combinations of 10-, 120- and 126-dimensional Higgs representations. Both the supersymmetric and non-supersymmetric versions are fitted, as well as both possible neutrino mass orderings. In contrast to most previous works, we perform the fits at the weak scale, i.e. we use RG evolution from the GUT scale, at which the GUT-relations between the various Yukawa coupling matrices hold, down to the weak scale. In addition, the right-handed neutrinos of the seesaw mechanism are integrated out one by one in the RG running. Other new features are the inclusion of recent results on the reactor neutrino mixing angle and the Higgs mass (in the non-SUSY case). As expected from vacuum stability considerations, the low Higgs mass and the large top-quark Yukawa coupling cause some pressure on the fits. A lower top-quark mass, as sometimes argued to be the result of a more consistent extraction from experimental results, can relieve this pressure and improve the fits. We give predictions for neutrino masses, including the effective one for neutrinoless double beta decay, as well as the atmospheric neutrino mixing angle and the leptonic CP phase for neutrino oscillations.
description: 40 pages, 2 figures. Published version
On the role of transition region on the Alfven wave phase mixing in solar spicules
Creators: name: Fazel, Z.
name: Ebadi, H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Alfvenic waves are thought to play an important role in coronal heating and solar wind acceleration. Here we investigate the dissipation of standing Alfven waves due to phase mixing at the presence of steady flow and sheared magnetic field in the stratified atmosphere of solar spicules. The transition region between chromosphere and corona has also been considered. The initial flow is assumed to be directed along spicule axis, and the equilibrium magnetic field is taken 2-dimensional and divergence-free. It is determined that in contrast to propagating Alfven waves, standing Alfven waves dissipate in time rather than in space. Density gradients and sheared magnetic fields can enhance damping due to phase mixing. Damping times deduced from our numerical calculations are in good agreement with spicule lifetimes. Since spicules are short living and transient structures, such a fast dissipation mechanism is needed to transport their energy to the corona.
description: Accepted for publication in Astrophysics and space Science. arXiv admin note: text overlap with arXiv:1303.0833, arXiv:1210.0485, arXiv:1209.2111; and with arXiv:1002.1360 by other authors
Meanings of multiethnicity : a case study of ethnicity and ethnic relations in Singapore
Creators: name: Lai, Ah-Eng
Publisher: name: Apollo - University of Cambridge Repository
Year: 1992

description: This thesis was digitised by the British Library from microfilm. You can acquire a single copy of this thesis for research purposes by clicking on the padlock icon on the thesis file. Please be aware that the text in the supplied thesis pdf file may not be as clear as text in a thesis that was born digital or digitised directly from paper due to the conversion in format. However, all of the theses in Apollo that were digitised from microfilm are readable and have been processed by optical character recognition (OCR) technology which means the reader can search and find text within the document. If you are the author of this thesis and would like to make your work openly available, please contact us: thesis@repository.cam.ac.uk
Examples of certain kind of minimal orbits of Hemann actions
Creators: name: Koike, Naoyuki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We give examples of certain kind of minimal orbits of Hermann actions and discuss whether each of the examples is austere.
description: 21 Pages. arXiv admin note: text overlap with arXiv:1001.3514
Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson
Creators: name: CLEO Collaboration
name: Onyisi, P. U. E.
name: Bonvicini, G.
name: Cinabro, D.
name: Smith, M. J.
name: Zhou, P.
name: Naik, P.
name: Rademacker, J.
name: Edwards, K. W.
name: Briere, R. A.
name: Vogel, H.
name: Rosner, J. L.
name: Alexander, J. P.
name: Cassel, D. G.
name: Das, S.
name: Ehrlich, R.
name: Gibbons, L.
name: Gray, S. W.
name: Hartill, D. L.
name: Heltsley, B. K.
name: Kreinick, D. L.
name: Kuznetsov, V. E.
name: Patterson, J. R.
name: Peterson, D.
name: Riley, D.
name: Ryd, A.
name: Sadoff, A. J.
name: Shi, X.
name: Sun, W. M.
name: Yelton, J.
name: Rubin, P.
name: Lowrey, N.
name: Mehrabyan, S.
name: Selen, M.
name: Wiss, J.
name: Libby, J.
name: Kornicer, M.
name: Mitchell, R. E.
name: Besson, D.
name: Pedlar, T. K.
name: Cronin-Hennessy, D.
name: Hietala, J.
name: Dobbs, S.
name: Metreveli, Z.
name: Seth, K. K.
name: Tomaradze, A.
name: Xiao, T.
name: Powell, A.
name: Thomas, C.
name: Wilkinson, G.
name: Asner, D. M.
name: Tatishvili, G.
name: Ge, J. Y.
name: Miller, D. H.
name: Shipsey, I. P. J.
name: Xin, B.
name: Adams, G. S.
name: Napolitano, J.
name: Ecklund, K. M.
name: Insler, J.
name: Muramatsu, H.
name: Pearson, L. J.
name: Thorndike, E. H.
name: Artuso, M.
name: Blusk, S.
name: Mountain, R.
name: Skwarnicki, T.
name: Stone, S.
name: Wang, J. C.
name: Zhang, L. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(Ds -> K- K+ pi+) = (5.55 +- 0.14 +- 0.13)%, where the uncertainties are statistical and systematic respectively. We find a significantly reduced value of B(Ds -> pi+ pi0 eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(Ds -> eta' X)$ into agreement. We also search for CP-violating asymmetries in Ds decays and measure the cross-section of e+ e- -> Ds* Ds at Ecm = 4.17 GeV.
description: 12 pages, 3 figures. Submitted to Physical Review D. PDF also available through http://www.lns.cornell.edu/public/CLNS/2013/ v2: as published in PRD
The legends of Pioreks saga af Bern
Creators: name: Davidson, Andrew R.
Publisher: name: Apollo - University of Cambridge Repository
Year: 1994

description: This thesis was digitised by the British Library from microfilm. You can acquire a single copy of this thesis for research purposes by clicking on the padlock icon on the thesis file. Please be aware that the text in the supplied thesis pdf file may not be as clear as text in a thesis that was born digital or digitised directly from paper due to the conversion in format. However, all of the theses in Apollo that were digitised from microfilm are readable and have been processed by optical character recognition (OCR) technology which means the reader can search and find text within the document. If you are the author of this thesis and would like to make your work openly available, please contact us: thesis@repository.cam.ac.uk
Optimization of thermal comfort in building through envelope design
Creators: name: Bojic, Milorad
name: Parvedy, Alexandre Patou
name: Boyer, Harry
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Due to the current environmental situation, energy saving has become the leading drive in modern research. Although the residential houses in tropical climate do not use air conditioning to maintain thermal comfort in order to avoid use of electricity. As the thermal comfort is maintained by adequate envelope composition and natural ventilation, this paper shows that it is possible to determine the thickness of envelope layers for which the best thermal comfort is obtained. The building is modeled in EnergyPlus software and HookeJeves optimization methodology. The investigated house is a typical residential house one-storey high with five thermal zones located at Reunion Island, France. Three optimizations are performed such as the optimization of the thickness of the concrete block layer, of the wood layer, and that of the thermal insulation layer. The results show optimal thickness of thermal envelope layers that yield the maximum TC according to Fanger predicted mean vote.
title: Saturation of CCCM friction surface with nickel and selenium
Creators: name: Roshchin, M.N.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The work is devoted to high-temperature laboratory tribological tests of the modified friction surface of CCCM. It was found that the modified friction surface of CCCM in Ni-Se-PTFE medium at friction on steel 40X13, temperature 300°C, load 1.0 MPa with an increase in speed from 0.05m/s leads to an increase in the coefficient of friction at 0.16 m/s by 11%, and at a speed of 0.25m/s by 16%. At a temperature of 700°C, a load of 1.0 MPa with an increase in speed from 0.05m/s entails an increase in the coefficient of friction at 0.16 m/s by 8%, and at a speed of 0.25m/s by 17%.
Cataulacus Smith 1853
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Cataulacus

description: Genre CATAULACUS.
Cataulacus, Smith, Transactions of the Entomological Society of London (1853).
Cataulacus, Mayrpartim (nec Mayr, species americana;).
Ce genre se sépare entièrement des autres Attini par la position relative de la fossette antennaire et des yeux; c'est donc à tort que Mayr lui avait ajouté les Meranoplus américains de Smith, et Emery a eu raison de fonder pour ces derniers le genre Procryptocerus.
[[worker]]. Arêtes frontales situées au bord de la tête, relativement courtes, mais continuées par une arête contournée qui passe en dessous des yeux (non loin de leur bord externe) et qui ne se termine qu'aux angles postérieurs de la tête. Le scape des antennes est entièrement logé dans une rainure située sous les arêtes frontales et sous l'arête précitée (sous le côté de la tête) (chez les Cryptocerini, les yeux sont situés sous la rainure des scapes et sous les arêtes frontales). Antennes de onze articles. Mandibules triangulaires, courtes, à bord terminal rectiligne et en général tranchant, ou peu s'en faut. Pronotum bordé, métanotum épineux. Premier n œ ud du pédicule non pétiole devant. Abdomen entièrement recouvert par la lame dorsale du premier segment qui est bordée latéralement.
[[queen]]. Semblable à l'ouvrière. Ailes avec une cellule cubitale, sans cellule discoïdale. La nervure transverse s'unit au tronc de la nervure cubitale (d'après Mayr).
[[male]]. Très semblable à la [[queen]] et à la [[worker]]. Antennes de onze articles avec une forte massue de trois articles et le scape fort long. Fossettes antennaires disposées sous les yeux et exactement conformées comme chez la [[queen]], ainsi que les arêtes frontales. Mandibules faiblement denticulées (peu de dents). Tête échancrée et large derrière. Mésonotum petit, bas, pourvu de deux sillons convergents. Métanotum épineux. Pédicule et abdomen comme chez la [[queen]]. Organes génitaux petits; valvules extérieures à côtés assez paralleles, obliquement tronquées et arrondies à l'extrémité. Ailes étroites et assez courtes. Une seule cellule cubitale; pas de cellule discoïdale. La nervure transverse s'unit à la nervure cubitale peu avant le point de bifurcation. La tache marginale s'étale sur tout le parcours de la cellule radiale, ainsi que sur une partie de la cellule cubitale et même un peu au delà. Pattes et antennes courtes.
(D'après le [[male]] d'une espèce nouvelle de l'Inde, Cataulacus latus, Forel.)
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on pages 144-145, DOI: 10.5281/zenodo.9896
Collapse of a relativistic self-gravitating star with radial heat flux: Impact of anisotropic stresses
Creators: name: Sharma, Ranjan
name: Das, Shyam
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We develop a simple model for a self-gravitating spherically symmetric relativistic star which begins to collapse from an initially static configuration by dissipating energy in the form of radial heat flow. We utilize the model to show how local anisotropy effects the collapse rate and thermal behaviour of gravitationally evolving systems.
description: To appear in Journal of Gravity
title: Theoretical background of vibroacoustic diagnostics and analysis of bearing units
Creators: name: Lepihova, V.A.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The analysis of acoustic emission signals with the help of integral Fourier transform, nonlinear and specialized transformations is given, which allows diagnosing defects of traction motor elements by examining the performance of rolling bearings. Decomposing an acoustic signal into components was proposed using an analog or digital spectrum analyzer. Processing of acoustic emission signals was carried out both in the spectral (in the form of a one-way Fourier spectrum of the acoustic signal) and in the cepstrum Fourier spectrum from the logarithmic spectrum of the representation power. The task of the research is to conduct a current rapid analysis of the state of the diagnosed elements in operation on a moving electric locomotive.
Algebras related to some sporadic simple groups
Creators: name: Ryba, A. J. E.
Publisher: name: Apollo - University of Cambridge Repository
Year: 1985

description: This thesis was digitised by the British Library from microfilm. You can acquire a single copy of this thesis for research purposes by clicking on the padlock icon on the thesis file. Please be aware that the text in the supplied thesis pdf file may not be as clear as text in a thesis that was born digital or digitised directly from paper due to the conversion in format. However, all of the theses in Apollo that were digitised from microfilm are readable and have been processed by optical character recognition (OCR) technology which means the reader can search and find text within the document. If you are the author of this thesis and would like to make your work openly available, please contact us: thesis@repository.cam.ac.uk
The Riesz basis property of an indefinite Sturm-Liouville problem with non-separated boundary conditions
Creators: name: Ćurgus, Branko
name: Fleige, Andreas
name: Kostenko, Aleksey
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We consider a regular indefinite Sturm-Liouville eigenvalue problem \{$-f" + q f = λr f$} on $[a,b]$ subject to general self-adjoint boundary conditions and with a weight function $r$ which changes its sign at finitely many, so-called turning points. We give sufficient and in some cases necessary and sufficient conditions for the Riesz basis property of this eigenvalue problem. In the case of separated boundary conditions we extend the class of weight functions $r$ for which the Riesz basis property can be completely characterized in terms of the local behavior of $r$ in a neighborhood of the turning points. We identify a class of non-separated boundary conditions for which, in addition to the local behavior of $r$ in a neighborhood of the turning points, local conditions on $r$ near the boundary are needed for the Riesz basis property. As an application, it is shown that the Riesz basis property for the periodic boundary conditions is closely related to a regular HELP-type inequality without boundary conditions.
description: Integr. Equat. Oper. Theory (2013), to appear
Dynamics of Ising models near zero temperature : Real Space Renormalization Approach
Creators: name: Monthus, Cecile
name: Garel, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider the stochastic dynamics of Ising ferromagnets (either pure or random) near zero temperature. The master equation satisfying detailed balance can be mapped onto a quantum Hamiltonian which has an exact zero-energy ground state representing the thermal equilibrium. The largest relaxation time $t_{eq}$ governing the convergence towards this Boltzmann equilibrium in finite-size systems is determined by the lowest non-vanishing eigenvalue $E_1=1/t_{eq}$ of the quantum Hamiltonian $H$. We introduce and study a real-space renormalization procedure for the quantum Hamiltonian associated to the single-spin-flip dynamics of Ising ferromagnets near zero temperature. We solve explicitly the renormalization flow for two cases. (i) For the one-dimensional random ferromagnetic chain with free boundary conditions, the largest relaxation time $t_{eq}$ can be expressed in terms of the set of random couplings for various choices of the dynamical transition rates. The validity of these RG results in $d=1$ is checked by comparison with another approach. (ii) For the pure Ising model on a Cayley tree of branching ratio $K$, we compute the exponential growth of $t_{eq}(N)$ with the number $N$ of generations.
description: 30 pages, v2=final version
title: On the application of dynamic quality`s criteria in researches of machine equipment`s hydrostatic bearings
Creators: name: Prokopenko, V.A.
name: Semenyuk, N.A.
name: Baranov, M.A.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The calculation criteria for estimating the dynamics of hydrostatic bearings are given. A comparison of their application possibilities is given. Means of increasing the dynamic quality of ACS due to the use of RC-correction are noted.
Entanglement entropy scaling of the XXZ chain
Creators: name: Chen, Pochung
name: Xue, Zhi-long
name: McCulloch, I. P.
name: Chung, Ming-Chiang
name: Cazalilla, Miguel
name: Yip, S. -K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the entanglement entropy scaling of the XXZ chain. While in the critical XY phase of the XXZ chain the entanglement entropy scales logarithmically with a coefficient that is determined by the associated conformal field theory, at the ferromagnetic point, however, the system is not conformally invariant yet the entanglement entropy still scales logarithmically albeit with a different coefficient. We investigate how such an nontrivial scaling at the ferromagnetic point influences the estimation of the central charge $c$ in the critical XY phase. In particular we use the entanglement scaling of the finite or infinite system, as well as the finite-size scaling of the ground state energy to estimate the value of $c$. In addition, the spin-wave velocity and the scaling dimension are also estimated. We show that in all methods the evaluations are influenced by the nearby ferromagnetic point and result in crossover behavior. Finally we discuss how to determine whether the central charge estimation is strongly influenced by the crossover behavior and how to properly evaluate the central charge.
title: Technological preparation of superhard crystalline materials for tribological tests
Creators: name: Alisin, V.V.
name: Zorya, V.I.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: In the article the analysis of the parameters characterizing the process of abrasive machining of ultra-hard crystalline materials. The conditions of transition from plastic displacement to brittle fracture depending on the grain size of the abrasive are established. The dependence of machinability characteristics on the hardness of the material is revealed.
title: Comprehensive analysis of technical perfection of a product of mechanical engineering at early stages of design
Creators: name: Irzaev, G.Kh.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The article addresses the issues of a comprehensive assessment of the technical excellence of a mechanical engineering product. An expert method is proposed for identifying complex criteria for the technical perfection of the product design, corresponding to the average and optimal values of analogues. The method helps the developer decide on the feasibility of continuing the design processes and preparing the production of a new product.
title: Samtfleckenkrankheit an Tomate – Neue Wege in der Resistenzzüchtung
Creators: name: Meyer, Ulrike
name: Gärber, Ute
name: Behrendt, Ulrike
name: Jordan, Florian
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2019
Subjects: subject: 630

description: Symposium zum nicht-chemischen Pflanzenschutz im Gartenbau ; Berlin, Deutschland ; 2019.05.28-29 [Poster]
Periodic outbursting YSOs as results from dynamical perturbation
Creators: name: Guo, Zhen
Publisher: name: Zenodo
Year: 2022

description: The Pre-Main-Sequence stellar evolution is shaped by the mass accretion process, which is also highly unstable. The near-IR VISTA Variables in the Via Lactea (VVV) survey has successfully observed the episodic mass accretion process on embedded young star objects (YSOs). In this talk, I will present our latest investigations on periodic outbursting YSO candidates discovered from the VVV survey (Guo et al., 2022). In total, 130 candidates are identified, with periods ranging between 10 to 1500 days, likely attributed to dynamical perturbations from a (sub)stellar mass companion. The accretion nature of several objects has been confirmed by spectroscopic follow-ups. Future multi-epoch high-resolution spectroscopic observations are planned to measure the mass of the perturber. This work does not only find indirect evidence of early-stage planet formation, but also provide valuable laboratories to study the mass accretion process in young star-planet systems through both observational and theoretical approaches.
Mapping Enzymatic Catalysis using the Effective Fragment Molecular Orbital Method: Towards all ab initio Biochemistry
Creators: name: Steinmann, Casper
name: Fedorov, Dmitri G.
name: Jensen, Jan H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We extend the Effective Fragment Molecular Orbital (EFMO) method to the frozen domain approach where only the geometry of an active part is optimized, while the many-body polarization effects are considered for the whole system. The new approach efficiently mapped out the entire reaction path of chorismate mutase in less than four days using 80 cores on 20 nodes, where the whole system containing 2398 atoms is treated in the ab initio fashion without using any force fields. The reaction path is constructed automatically with the only assumption of defining the reaction coordinate a priori. We determine the reaction barrier of chorismate mutase to be $18.3\pm 3.5$ kcal mol$^{-1}$ for MP2/cc-pVDZ and $19.3\pm 3.6$ for MP2/cc-pVTZ in an ONIOM approach using EFMO-RHF/6-31G(d) for the high and low layers, respectively.
description: SI not attached
title: Features of two-stage conical reducer construction
Creators: name: Schevchenko, S.V.
name: Mukhovaty, A.A.
name: Krol, O.S.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: Two options for splitting the gear ratio of a two-stage bevel gear are proposed. The first breakdown option is based on reducing the largest overall size of this type of gearbox – the length. The second breakdown option is based on the equal strength of the steps according to the criterion of contact endurance of the teeth. For the practical selection of the gear ratio of the leading stage of this gearbox, a schedule and analytical dependencies are proposed.
Requiem for a Gene: The Problem of Junk DNA for the Molecular Paradigm
Creators: name: Sweet, Amalia
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: History of Science
subject: History of Biology
subject: Molecular Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Genomics
subject: Francis Crick
subject: Paul Doty
subject: Julius Marmur
subject: Junk DNA
subject: Noncoding DNA
subject: Genetic Code
subject: Central Dogma
subject: Sequence Hypothesis
subject: DNA Hybridization
subject: Coding Problem
subject: Protein Synthesis

description: “Junk DNA” has been at the center of several high-profile scientific controversies over the past four decades, most recently in the disputes over the ENCODE Project. Despite its prominence in these debates, the concept has yet to be properly historicized. In this thesis, I seek to redress this oversight, inaugurating the study of junk DNA as a historical object and establishing the need for an earlier genesis for the concept than scholars have previously recognized. In search of a new origin story for junk, I chronicle developments in the recognition and characterization of noncoding DNA sequences, positioning them within existing historiographical narratives. Ultimately, I trace the origin of junk to 1958, when a series of unexpected findings in bacteria revealed the existence of significant stretches of DNA that did not encode protein. I show that the discovery of noncoding DNA sequences undermined molecular biologists’ vision of a gene as a line of one-dimensional code and, in turn, provoked the first major crisis in their nascent field. It is from this crisis, I argue, that the concept of junk DNA emerged. Moreover, I challenge the received narrative of junk DNA as an uncritical reification of the burgeoning molecular paradigm. By separating the history of junk DNA from its mythology, I demonstrate that the conceptualization of junk DNA reveals not the strength of molecular biological authority but its fragility.
Dissipative particle dynamics study of solvent mediated transitions in pores decorated with tethered polymer brushes in the form of stripes
Creators: name: Ilnytskyi, Ja. M.
name: Sokolowski, S.
name: Patsahan, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study self-assembly of a binary mixture of components A and B confined in a slit-like pore with the walls modified by the stripes of tethered brushes made of beads of a sort A. The emphasis is on solvent mediated transitions between morphologies when the composition of the mixture varies. For certain limiting cases of the pore geometry we found that an effective reduction of the dimensionality may lead to a quasi one- and two-dimensional demixing. The change of the environment for the chains upon changing the composition of the mixture from polymer melt to a good solvent conditions provides explanation for the mechanism of development of several solvent mediated morphologies and, in some cases, for switching between them. We found solvent mediated lamellar, meander and in-lined cylinder phases. Quantitative analysis of morphology structure is performed considering brush overlap integrals and gyration tensor components.
description: 14 pages, 12 figures
The Stellar Initial Mass Function of Ultra-Faint Dwarf Galaxies: Evidence for IMF Variations with Galactic Environment
Creators: name: Geha, M.
name: Brown, T. M.
name: Tumlinson, J.
name: Kalirai, J.
name: Simon, J. D.
name: Kirby, E.
name: VandenBerg, D.
name: Munoz, R. M.
name: Avila, R.
name: Guhathakurta, P.
name: Ferguson, H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present constraints on the stellar initial mass function (IMF) in two ultra-faint dwarf (UFD) galaxies, Hercules and Leo IV, based on deep HST/ACS imaging. The Hercules and Leo IV galaxies are extremely low luminosity (M_V = -6.2, -5.5), metal-poor (= -2.4, -2.5) systems that have old stellar populations (> 11 Gyr). Because they have long relaxation times, we can directly measure the low-mass stellar IMF by counting stars below the main-sequence turnoff without correcting for dynamical evolution. Over the stellar mass range probed by our data, 0.52 - 0.77 Msun, the IMF is best fit by a power-law slope of alpha = 1.2^{+0.4}_{-0.5} for Hercules and alpha = 1.3 +/- 0.8 for Leo IV. For Hercules, the IMF slope is more shallow than a Salpeter IMF (alpha=2.35) at the 5.8-sigma level, and a Kroupa IMF (alpha=2.3 above 0.5 Msun) at 5.4-sigma level. We simultaneously fit for the binary fraction, finding f_binary = 0.47^{+0.16}_{-0.14} for Hercules, and 0.47^{+0.37}_{-0.17} for Leo IV. The UFD binary fractions are consistent with that inferred for Milky Way stars in the same mass range, despite very different metallicities. In contrast, the IMF slopes in the UFDs are shallower than other galactic environments. In the mass range 0.5 - 0.8 Msun, we see a trend across the handful of galaxies with directly measured IMFs such that the power-law slopes become shallower (more bottom-light) with decreasing galactic velocity dispersion and metallicity. This trend is qualitatively consistent with results in elliptical galaxies inferred via indirect methods and is direct evidence for IMF variations with galactic environment.
description: 10 pages, 5 figures, accepted to ApJ
title: Sortenmischungen für einen stabilen ökologischen Salatanbau
Creators: name: Gärber, Ute
name: Kultursaat e. V., Oldendorfer
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2019
Subjects: subject: 630

description: Symposium zum nicht-chemischen Pflanzenschutz im Gartenbau ; Berlin, Deutschland ; 2019.05.28-29 [Poster]
Strong Lensing with Finite Temperature Scalar Field Dark Matter
Creators: name: Robles, V. H.
name: Matos, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the gravitational constraints imposed to dark matter halos in the context of finite temperature scalar field dark matter. We find constraints to produce multiple images by dark matter only, we show that there are differences with respect to the full Bose Einstein condensate halo when the temperature of the scalar field in dark matter halos is taken into account. The non zero temperature allows the scalar field to be in excited states and recently, their existence has proved to be necessary to fit rotation curves of dark matter dominated galaxies of all sizes, it also explained the non universality of the halo density profiles. Therefore, we expect that combining observations of rotation curves and strong lensing systems can give us a clue to the nature of dark matter. Finally, we propose a method to identify the excited state of a strong lens halo, knowing various halo excited states can provide information of the scalar field dark matter halo evolution which can be tested using numerical simulations.
description: 4 pages, 2 figures
title: L’uomo fatto ad imagine di Dio fu anche fatto ad imagine della scimia
Creators: name: Barrago, Francesco
Publisher: name: UNICApress
Year: 2018

description: In una nota a piè di pagina dell’introduzione al Descent of Man, Charles Darwin commenta i contributi meno conosciuti sul tema dell’evoluzione umana. La nota integra la discussione sulle opere di «eminenti naturalisti e filosofi, come Wallace, Huxley, Lyell, Vogt, Lubbock, Büchner, Roll», citando due studiosi italiani: Giovanni Canestrini, autore di «uno scritto molto curioso sui caratteri rudimentali», e Francesco Barrago.
Gaps between jets in double-Pomeron-exchange processes at the LHC
Creators: name: Marquet, C.
name: Royon, C.
name: Trzebinski, M.
name: Zlebcik, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility to measure jet-gap-jet final states in double-Pomeron-exchange events at the LHC is presented. In the context of the ATLAS experiment with additional forward physics detectors, cross sections for different experimental settings and gap definitions are estimated. This is done in the framework of the Forward Physics Monte Carlo interfaced with a perturbative QCD model that successfully reproduces standard jet-gap-jet cross sections at the Tevatron. The extrapolation to LHC energies follows from the Balitsky-Fadin-Kuraev-Lipatov dynamics, implemented in the model at next-to-leading logarithmic accuracy.
description: 8 pages, 5 figures, version to appear in PRD
Probing the extreme realm of AGN feedback in the massive galaxy cluster, RX J1532.9+3021
Creators: name: Hlavacek-Larrondo, J.
name: Allen, S. W.
name: Taylor, G. B.
name: Fabian, A. C.
name: Canning, R. E. A.
name: Werner, N.
name: Sanders, J. S.
name: Grimes, C. K.
name: Ehlert, S.
name: von der Linden, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a detailed Chandra, XMM-Newton, VLA and HST analysis of one of the strongest cool core clusters known, RX J1532.9+3021 (z=0.3613). Using new, deep 90 ks Chandra observations, we confirm the presence of a western X-ray cavity or bubble, and report on a newly discovered eastern X-ray cavity. The total mechanical power associated with these AGN-driven outflows is (22+/-9)*10^44 erg/s, and is sufficient to offset the cooling, indicating that AGN feedback still provides a viable solution to the cooling flow problem even in the strongest cool core clusters. Based on the distribution of the optical filaments, as well as a jet-like structure seen in the 325 MHz VLA radio map, we suggest that the cluster harbours older outflows along the north to south direction. The jet of the central AGN is therefore either precessing or sloshing-induced motions have caused the outflows to change directions. There are also hints of an X-ray depression to the north aligned with the 325 MHz jet-like structure, which might represent the highest redshift ghost cavity discovered to date. We further find evidence of a cold front (r=65kpc) that coincides with the outermost edge of the western X-ray cavity and the edge of the radio mini-halo. The common location of the cold front with the edge of the radio mini-halo supports the idea that the latter originates from electrons being reaccelerated due to sloshing induced turbulence. Alternatively, its coexistence with the edge of the X-ray cavity may be due to cool gas being dragged out by the outburst. We confirm that the central AGN is highly sub-Eddington and conclude that a >10^10M_Sun or a rapidly spinning black hole is favoured to explain both the radiative-inefficiency of the AGN and the powerful X-ray cavities.
description: Accepted for publication to ApJ (minor corrections), 16 pages, 16 figures, 5 tables. Full resolution at http://www.stanford.edu/~juliehl/M1532/
Early Dynamical Instabilities in the Giant Planet Systems
Creators: name: Lega, Elena
name: Morbidelli, Alessandro
name: Nesvorný, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The observed wide eccentricity distribution of extrasolar giant planets is thought to be the result of dynamical instabilities and gravitational scattering among planets. Previously, it has been assumed that the orbits in giant planet systems become gravitationally unstable after the gas nebula dispersal. It was not well understood, however, how these unstable conditions were established in the first place. In this work we numerically simulate the evolution of systems of three planets as the planets sequentially grow to Jupiter's mass, and dynamically interact among themselves and with the gas disk. We use the hydro-dynamical code FARGO that we modified by implementing the $N$-body integrator SyMBA. The new code can handle close encounters and collisions between planets. To test their stability, the planetary systems were followed with SyMBA for up to $10^8$ yr after the gas disk dispersal. We find that dynamics of the growing planets is complex, because migration and resonances raise their orbital eccentricities, and cause dynamical instabilities when gas is still around. If the dynamical instabilities occur early, planets can be removed by collisions and ejections, and the system rearranges into a new, more stable configuration. In this case, the planetary systems emerging from the gas disks are expected to be stable, and would need to be destabilized by other means (low-mass planets, planetesimal disks, etc.). Alternatively, for the giant planet system to be intrinsically unstable upon the gas disk dispersal, a special timing would be required with the growth of (at least some of) the giant planets having to occur near the end of the gas disk lifetime.
description: 10 pages, 9 figures
Cooper pairing above the critical temperature in a unitary Fermi gas
Creators: name: Wlazłowski, Gabriel
name: Magierski, Piotr
name: Drut, Joaquín E.
name: Bulgac, Aurel
name: Roche, Kenneth J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present an ab initio determination of spin responses of the unitary Fermi gas, based on finite temperature quantum Monte Carlo calculations and the Kubo linear-response formalism. We determine the temperature dependence of the spin susceptibility and the spin conductivity. We show that both quantities exhibit suppression above the critical temperature of the superfluid to normal phase transition due to presence of the Cooper pairs. The spin diffusion transport coefficient does not display the existence of a minimum in the vicinity of the critical temperature and it drops to very low values D_s approx 0.8hbar/m in the superfluid phase. All these spin observables show a smooth and monotonic behavior with temperature when crossing the critical temperature T_c, until the Fermi liquid regime is attained at the temperature T*, where the pseudogap regime disappears.
description: 9 pages, 8 figures; supplemental materials included; published version
title: Design and technological preparation for production using import substituted software
Creators: name: Loginov, A.Yu.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The article deals with the situation about import substitution of design and technological preparation for production software on machinery plants of Russian Federation. Author discusses import substituted software criteria and analyzes the market of CAD/CAE and PDM/PLM software in Russia using some examples. The main software transformation targets for the industry are moving supported operating systems from Microsoft Windows (Server and Desktop) to Linux operating systems and substituting internal database engine of PDM/PLM systems from Microsoft Windows SQL server to database engines from Unified Register of Russian Programs (for example Postgres Pro).
title: Increasing the durability of the cutting tool after regrinding, by laser ablation in the liquid
Creators: name: Yagyaev, E.E.
name: Shron, L.B.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: In the article, based on the analysis of various methods of hardening treatment, a method is proposed to improve the resistance characteristics of the cutting tool after regrinding, by applying a nanostructure coating on the surface when irradiated with nanosecond laser pulses in a liquid.
Evaluating Laguerre-Gaussian beams with an invariant parameter
Creators: name: Long, Junling
name: Liu, Ruifeng
name: Wang, Yunlong
name: Wang, Feiran
name: Zhang, Pei
name: Gao, Hong
name: Li, Fuli
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We define a new parameter about Laguerre-Gaussian (LG) beams, named $Q^{l}_{p}$, which is only related to mode indices $p$ and $l$. This parameter is able to both evaluate and distinguish LG beams. The $Q^{l}_{p}$ values are first calculated theoretically and then measured experimentally for several different LG beams. Another mode quality parameter, $ M^{2} $ value, is also measured. The comparison between $Q^{l}_{p}$ and $ M^{2}$ shows same trend for the quality of LG mode, while the measurement of $Q^{l}_{p}$ is much easier than $ M^{2}$.
description: 3.1 pages, 4 figures, 1 table
title: On the axial design of special tools for undercut machining in deep holes with the help of CAE-sysiem
Creators: name: Zorenko, D.A.
Publisher: name: Scientific Research Centre "MachineStructure"
Year: 2019

description: The article presents the main results of the design and CAE-modeling of the stress state of the expansion-boring tool for processing undercuts in holes with a depth of more than ten diameters. Recommendations on the choice of processing technology of this type of structural elements are given.