cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quaqntenmechanik anhand der ganzheitlichen Verdrängungtheorie
Creators: name: Shalabi, Fuad
Publisher: name: Zenodo
Year: 2023
Subjects: Quantenmechanik, Verdrängungstheorie

description: Erklärung aller quantenmechanischen Phänomene und Experimenten mit meiner ganzheitlichen Verdrängungstheorie. Fassen sie es als Erklärungsangebot auf.
Heesch Numbers of Unmarked Polyforms
Creators: name: Kaplan, Craig S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: G.2.3; D.1.6
subject: 52C20

description: A shape's Heesch number is the number of layers of copies of the shape that can be placed around it without gaps or overlaps. Experimentation and exhaustive searching have turned up examples of shapes with finite Heesch numbers up to six, but nothing higher. The computational problem of classifying simple families of shapes by Heesch number can provide more experimental data to fuel our understanding of this topic. I present a technique for computing Heesch numbers of non-tiling polyforms using a SAT solver, and the results of exhaustive computation of Heesch numbers up to 19-ominoes, 17-hexes, and 24-iamonds.
description: 18 Pages, 9 Figures, 6 Tables
Hitchhiker’s Guide to Voltammetry: Acute and Chronic Electrodes for in Vivo Fast-Scan Cyclic Voltammetry
Creators: name: Wightman, R. Mark
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Fast-scan cyclic voltammetry (FSCV) has been used for over 20 years to study rapid neurotransmission in awake and behaving animals. These experiments were first carried out with carbon-fiber microelectrodes (CFMs) encased in borosilicate glass, which can be inserted into the brain through micromanipulators and guide cannulas. More recently, chronically implantable CFMs constructed with small diameter fused-silica have been introduced. These electrodes can be affixed in the brain with minimal tissue response, which permits longitudinal measurements of neurotransmission in single recording locations during behavior. Both electrode designs have been used to make novel discoveries in the fields of neurobiology, behavioral neuroscience, and psychopharmacology. The purpose of this Review is to address important considerations for the use of FSCV to study neurotransmitters in awake and behaving animals, with a focus on measurements of striatal dopamine. Common issues concerning experimental design, data collecti...
Non-Abelian atom optics
Creators: name: Jacob, Andreas
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2009
Subjects: subject: Atom optics
subject: non-Abelian gauge fields
subject: artificial electromagnetism
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Synthesis and Preliminary Studies of a Novel Negative Allosteric Modulator, 7-((2,5-Dioxopyrrolidin-1-yl)methyl)-4-(2-fluoro-4-[ 11 C]methoxyphenyl) quinoline-2-carboxamide, for Imaging of Metabotropic Glutamate Receptor 2
Creators: name: Liang, Steven H.
name: Zhang, Ming-Rong
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Metabotropic glutamate 2 receptors (mGlu2) are involved in the pathogenesis of several CNS disorders and neurodegenerative diseases. Pharmacological modulation of this target represents a potential disease-modifying approach for the treatment of substance abuse, depression, schizophrenia, and dementias. While quantification of mGlu2 receptors in the living brain by positron emission tomography (PET) would help us better understand signaling pathways relevant to these conditions, few successful examples have been demonstrated to image mGlu2 in vivo, and a suitable PET tracer is yet to be identified. Herein we report the design and synthesis of a radiolabeled negative allosteric modulator (NAM) for mGlu2 PET tracer development based on a quinoline 2-carboxamide scaffold. The most promising candidate, 7-((2,5-dioxopyrrolidin-1-yl)methyl)-4-(2-fluoro-4-[11C]methoxyphenyl) quinoline-2-carboxamide ([11C]QCA) was prepared in 13% radiochemical yield (non-decay-corrected at the end of synthesis) with >99% radiochemical purity and >74 GBq/μmol (2 Ci/μmol) specific activity. While the tracer showed limited brain uptake (0.3 SUV), probably attributable to effects on PgP/Bcrp efflux pump, in vitro autoradiography studies demonstrated heterogeneous brain distribution and specific binding. Thus, [11C]QCA is a chemical probe that provides the basis for the development of a new generation mGlu2 PET tracers.
Dynamical Barriers in the Dyson Hierarchical model via Real Space Renormalization
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: The Dyson hierarchical one-dimensional Ising model of parameter $σ>0$ contains long-ranged ferromagnetic couplings decaying as $1/r^{1+σ}$ in terms of the distance $r$. We study the stochastic dynamics near zero-temperature via the Real Space Renormalization introduced in our previous work (C. Monthus and T. Garel, arxiv:1212.0643) in order to compute explicitly the equilibrium time $t_{eq}(L)$ as a function of the system size $L$. For $σ<1$ where the static critical temperature for the ferromagnetic transition is finite $T_c>0$, we obtain that dynamical barriers grow as the power-law: $\ln t_{eq}(L) \simeq β(\frac{4 J_0}{3(2^{1-σ}-1)}) L^{1-σ}$. For $σ=1$ where the static critical temperature vanishes $T_c=0$, we obtain that dynamical barriers grow logarithmically as : $\ln t_{eq}(L) \simeq [β(\frac{4 J_0}{3 \ln 2}) -1] \ln L $. We also compute finite contributions to the dynamical barriers that can depend on the choice of transition rates satisfying detailed balance.
description: 13 pages
title: De Eendragt. Ein Schiffsmodell aus den Sammlungen des Germanischen Nationalmuseums
Creators: name: Rüdel, Horst
name: Schürer, Ralf
Publisher: name: University Library Heidelberg
Year: 2016

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 50 (2016): KulturGut: aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Wenn aus Worten Bilder werden
Creators: name: Steinebach, Martin
Publisher: name: Gesellschaft für Informatik
Year: 2023
Subjects: subject: Text-to-Image||Deepfake

description: Ein paar Begriffe eintippen, kurz warten und schon entsteht ein Bild, das nie eine Kamera aufgenommen hat: Text-to-Image-Verfahren stellen die Mediensicherheit vor neue Herausforderungen. Ein Bildforensiker erklärt, was die neue Technologie kann und was - noch - nicht.
VUV source for two-color dynamics studies at FLASH2
Creators: name: Appi, Elisa
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: nonlinear optics
subject: high-order harmonic generation
subject: free electron lasers
subject: two colors pump-probe schemes
subject: time-resolved studies
subject: nichtlineare Optik
subject: Pump-Probe-Technik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Free electron lasers (FELs) and high order harmonic generation (HHG) sources produce ultrafast coherent extreme ultraviolet (XUV) and X-ray radiation. These two powerful sources are optimal tools for time-resolved studies of ultrafast dynamics due to their high spatial and temporal resolution. Common time-resolved studies make use of pump-probe schemes, where a first pulse triggers a dynamics and a second delayed pulse probes the status of the target at a known moment in time. Split-and-delay units are often employed in order to separate the pump and probe pulses provided by a single high photon flux source. Alternatively, a second synchronized source can be added for two-color experiments. In this case, the two photon energies are chosen accordingly to the process under investigation. Typically, the spectral range covered by secondary sources spans from the ultraviolet to the THz range. However, the parameter space can be extended by combining two separate short-wavelength systems, such as a FEL and a HHG-based beamline. Such con figuration bene fits from the sources complementary properties, opening a new regime for two-color studies in the XUV/X-ray range. The permanent integration of a HHG-based source in a FEL endstation was recently realized for the first time at the free electron laser FLASH and is presented in this thesis work. Preliminary studies on the source confi guration and pressure calculations allowed to design a compact and reliable system, able to encounter the challenging vacuum requirements given by the ultra high-vacuum FEL endstation. The HHG process is driven by a OPCPA laser system, synchronized with the unique FEL burst timing, which delivers femtosecond pulses used for the generation of vacuum ultraviolet (VUV) light in a gas target. The emitted radiation is resolved in a compact in-line spectrometer and can be spectrally tuned by means of a rotatable double fi lterwheel. A hyperboloidal carbon-coated mirror allows for the coupling in the FEL endstation where the VUV beam is focused into a reaction microscope (REMI). First commissioning results have shown the generation of radiation from 10 to 40 eV with pulse energies up to 0.1 nJ and the successful focusing in REMI down to a 20 μm diameter spot. Photo-electron momentum measurements in argon indicate the source capabilities for future pump-probe experiments.
TEM00 mode power scaling in specialty fibers
Creators: name: Karow, Malte
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Ytterbium fiber amplifier
subject: single-frequency
subject: large mode area
subject: Ytterbium Faserverstärker
subject: einfrequent
subject: große Modenfelddurchmesser
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Extension of Chern-Simons forms and new gauge anomalies
Creators: name: Antoniadis, Ignatios
name: Savvidy, George
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a general analysis of gauge invariant, exact and metric independent forms which can be constructed using higher rank field-strength tensors. The integrals of these forms over the corresponding space-time coordinates provides new topological Lagrangians. With these Lagrangians one can define gauge field theories which generalize the Chern-Simons quantum field theory. We also present explicit expressions for the potential gauge anomalies associated with the tensor gauge fields and classify all possible anomalies that can appear in lower dimensions. Of special interest are those which can be constructed in four, six, eight and ten dimensions.
description: LaTeX file, 15 pages
Crux and long cycles in graphs
Creators: name: Haslegrave, John
name: Hu, Jie
name: Kim, Jaehoon
name: Liu, Hong
name: Luan, Bingyu
name: Wang, Guanghui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We introduce a notion of the \emph{crux} of a graph $G$, measuring the order of a smallest dense subgraph in $G$. This simple-looking notion leads to some generalisations of known results about cycles, offering an interesting paradigm of `replacing average degree by crux'. In particular, we prove that \emph{every} graph contains a cycle of length linear in its crux. Long proved that every subgraph of a hypercube $Q^m$ (resp. discrete torus $C_3^m$) with average degree $d$ contains a path of length $2^{d/2}$ (resp. $2^{d/4}$), and conjectured that there should be a path of length $2^{d}-1$ (resp. $3^{d/2}-1$). As a corollary of our result, together with isoperimetric inequalities, we close these exponential gaps giving asymptotically optimal bounds on long paths in hypercubes, discrete tori, and more generally Hamming graphs. We also consider random subgraphs of $C_4$-free graphs and hypercubes, proving near optimal bounds on lengths of long cycles.
description: 16 pages, 1 figure. Minor changes. Accepted by SIAM Journal on Discrete Mathematics
Bronchoalveoläre Spezifizierung von pluripotenten Stammzellen : der Effekt von Dexamethason, cAMP-erhöhenden Substanzen und Keratinozytenwachstumsfaktor
Creators: name: Katsirntaki, Katherina-Elpida
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Murine ES cells and iPS cells
subject: differentiation
subject: Clara cells
subject: Murine ES-Zellen und iPS-Zellen
subject: Differenzierung
subject: Clara-Zellen
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Charakterisierung leberspezifischer Immunantworten bei chronischer autoimmuner Hepatitis in einem neuen Mausmodell
Creators: name: Fischer, Katja
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Virusinfection
subject: immunopathogenesis
subject: Autoimmune Hepatitis
subject: Virusinfektion
subject: Immunpathogenese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Unveiling the nature of the unidentified gamma-ray sources II: radio, infrared and optical counterparts of the gamma-ray blazar candidates
Creators: name: Massaro, F.
name: D'Abrusco, R.
name: Paggi, A.
name: Masetti, N.
name: Giroletti, M.
name: Tosti, G.
name: Smith, Howard A.
name: Funk, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A significant fraction (~30%) of the high-energy gamma-ray sources listed in the second Fermi LAT catalog (2FGL) are still of unknown origin, being not yet associated with counterparts at low energies. We recently developed a new association method to identify if there is a gamma-ray blazar candidate within the positional uncertainty region of a generic 2FGL source. This method is entirely based on the discovery that blazars have distinct infrared colors with respect to other extragalactic sources found thanks, to the Wide-field Infrared Survey Explorer (WISE) all-sky observations. Several improvements have been also performed to increase the efficiency of our method in recognizing gamma-ray blazar candidates. In this paper we applied our method to two different samples, the first constituted by the unidentified gamma-ray sources (UGSs) while the second by the active galaxies of uncertain type (AGUs), both listed in the 2FGL. We present a catalog of IR counterparts for ~20% of the UGSs investigated. Then, we also compare our results on the associated sources with those present in literature. In addition, we illustrate the extensive archival research carried out to identify the radio, infrared, optical and X-ray counterparts of the WISE selected, gamma-ray blazar candidates. Finally, we discuss the future developments of our method based on ground-based follow-up observations.
description: 31 page, 3 figures, 11 tables, ApJS accepted for publication
Sigma models with N=8 supersymmetries in 2+1 and 1+1 dimensions
Creators: name: Popov, Alexander D.
Publisher: name: Amsterdam : Elsevier Science
Year: 2007
Subjects: subject: Bogomolny-type model
subject: Nonlinear sigma models
subject: supersymmetric SDYM equations
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We introduce an N = 8 supersymmetric extension of the Bogomolny-type model for Yang-Mills-Higgs fields in 2 + 1 dimensions related with twistor string theory. It is shown that this model is equivalent to an N = 8 supersymmetric U(n) chiral model in 2 + 1 dimensions with a Wess-Zumino-Witten-type term. Further reduction to 1 + 1 dimensions yields N = (8, 8) supersymmetric extensions of the standard U(n) chiral model and Grassmannian sigma models.
Padus vulgaris Gaudin
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: V. Cracca L. Ssp. vulgaris Gaudin (V. Cracca L. s.str., V. Cr. ssp. imbricata [Gilib.] Rouy) Cat. 80. 3: Valsorey (Guyot); Val d'Heremence (J.); Turtmanntal (Beauverd); Törbel (Stehler); Zermatt (R. Chodat,Thellung). - 4:Binntal (J, Binz). Var. pseudocassubica Klett et Richter - «Wallis» (nach Garns in Hegi, Flora, IV, 3, S. 1531 [1924]), Ssp. Gerardi Gaudin (V. Gerardi AI], non Jacq., V. incana Gouan, V. galloprovincialis Poiret, V. Cr. ssp. incana Rouy, V. Cr. ssp. galloprovincialis A.etG.) Cat. 80 und 424. 2: Feschel-Erschmatt (Becherer); ob Hohtenn (Becherer und Schatzmann). - 3: Ob Riddes (J.); Iserables (P.); Törbel (Mantz, Stehler); Stalden-Eisten (Rohrer); Almagell (A. Keller); Visp- Gamsen (Becherer). - 3a:Rossbodenbergsturz ob Simplon-Dorf (Exk. Soc. Murith.). - 4:Binn: Schmidigenhäusern,Giessen,unter dem Schatzturm (alles:Binz). Var. glabrescens Christ- 3: Zermatt (Christ). Ssp. tenuifolia (Roth) Gaudin (V. tenuifolia Roth) Cat. 80und424. l: Ob Ravoire (J.). - 2: In der Gegend von Fully ob Jeur-Brülee bis 1600 m (Garns); Sitten (Wilczek). - 3: Mont-Chemin (Closuit); Flanmayens ob Evolene (Grandjean).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Efficacy of the Australian Securities and Investments Commission in regulating illegal phoenixing in the Australian building and construction industry
Creators: name: Michail, Nancy
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: This research project investigates the effective regulation of illegal phoenixing in the Australian building and construction industry. In doing so, the research examines the context, conduct and culture of the industry in light of illegal phoenixing and illegal phoenix activities. Further, it examines the current rules, legislations and regulation theories used by the regulatory agency under investigation to address this problem. It then analyses the concerned regulatory agency’s efficacy in dealing with illegal phoenixing considering the theoretical framework for effective regulation developed in this project, and it proposes a more appropriate solution for the industry given its culture, conduct and context. In addition, further recommendations are made to achieve better results for the concerned regulatory industry
Ultracold atomic Bose and Fermi spinor gases in optical lattices
Creators: name: Eckert, K.
name: Zawitkowski, L.
name: Leskinen, M. J.
name: Sanpera, A.
name: Lewenstein, M.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2007
Subjects: subject: einstein condensation
subject: quantum phases
subject: resonant light
subject: ground-states
subject: one bosons
subject: antiferromagnets
subject: systems
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate magnetic properties of Mott-insulating phases of ultracold Bose and Fermi spinor gases in optical lattices. We consider in particular the F = 2 Bose gas, and the F = 3/2 and 5/2 Fermi gases. We derive effective spin Hamiltonians for one and two atoms per site and discuss the possibilities of manipulating the magnetic properties of the system using optical Feshbach resonances. We discuss low temperature quantum phases of a Rb-87 gas in the F = 2 hyperfine state, as well as possible realizations of high spin Fermi gases with either Li-6 or Cs-132 atoms in the F = 3/2 state, and with Yb-173 atoms in the F = 5/2 state.
Application of a generalized likelihood ratio test statistic to MAGIC data
Creators: name: Klepser, S.
name: Krause, J.
name: Sitarek, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The commonly used detection test statistic for Cherenkov telescope data is Li & Ma (1983), Eq. 17. It evaluates the compatibility of event counts in an on-source region with those in a representative off-region. It does not exploit the typically known gamma-ray point spread function (PSF) of a system, and in practice its application requires either assumptions on the symmetry of the acceptance across the field of view, orMonte Carlo simulations.MAGIC has an azimuth-dependent, asymmetric acceptance which required a careful review of detection statistics. Besides an adapted Li & Ma based technique, the recently presented generalized LRT statistic of [1] is now in use. It is more flexible, more sensitive and less systematics-affected, because it is highly customized for multi-pointing Cherenkov telescope data with a known PSF. We present the application of this new method to archival MAGIC data and compare it to the other, Li&Ma-based method.
description: 4 pages, 2 figures. Published in Proc. of the 5th International Meeting of High Energy Gamma-Ray Astronomy
"Langweilige Museen? Nein, danke!" : nachhaltige Vermittlungsmethoden in Ausstellungen
Creators: name: Golgath, Tabea
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Exhibition
subject: learning
subject: Museum
subject: Ausstellung
subject: Vermittlung
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: [no abstract]
An Entourage Approach to the Contraction Principle in Uniform Spaces Endowed with a Graph
Creators: name: Aghanians, A.
name: Fallahi, K.
name: Nourouzi, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 47H10, 05C40

description: In this paper, we study Banach contractions in uniform spaces endowed with a graph and give some sufficient conditions for a mapping to be a Picard operator. Our main results generalize some results of [J. Jachymski, "The contraction principle for mappings on a metric space with a graph", Proc. Amer. Math. Soc. 136 (2008) 1359-1373] employing the basic entourages of the uniform space.
description: 20 pages
Totalsynthese der Argyrine F und G und Synthese des C19-C28 Fragments von Angiolam A
Creators: name: Girbig, Anna-Katharina
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: total synthesis
subject: natural product synthesis
subject: peptide coupling
subject: myxobacteria
subject: argyrins
subject: proteasome inhibitor
subject: Totalsynthese
subject: Naturstoffsynthese
subject: Peptidkupplung
subject: Myxobakterien
subject: Argyrine
subject: Proteasominhibitator
subject: Angiolam A
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Vortex ground state for small arrays of magnetic particles with dipole coupling
Creators: name: Dzian, S. A.
name: Galkin, A. Yu.
name: Ivanov, B. A.
name: Kireev, V. E.
name: Muravyov, V. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that a magnetic vortex is the ground state of an array of magnetic particles shaped as a hexagonal fragment of a triangular lattice, even for an small number of particles in the array $N \leq 100$. The vortex core appears and the symmetry of the vortex state changes with the increase of the intrinsic magnetic anisotropy of the particle $β$; the further increase of $β$ leads to the destruction of the vortex state. Such vortices can be present in arrays as small in size as dozen of nanometers.
description: 7 pages, 7 figures
Spin noise spectroscopy of donor-bound electrons in ZnO
Creators: name: Horn, H.
name: Balocchi, A.
name: Marie, X.
name: Bakin, A.
name: Waag, A.
name: Oestreich, Michael
name: Hübner, Jens
Publisher: name: College Park, MD : American Physical Society
Year: 2013
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate the intrinsic spin dynamics of electrons bound to Al impurities in bulk ZnO by optical spin noise spectroscopy. Spin noise spectroscopy enables us to investigate the longitudinal and transverse spin relaxation time with respect to nuclear and external magnetic fields in a single spectrum. On one hand, the spin dynamic is dominated by the intrinsic hyperfine interaction with the nuclear spins of the naturally occurring 67Zn isotope. We measure a typical spin dephasing time of 23 ns, in agreement with the expected theoretical values. On the other hand, we measure a third, very high spin dephasing rate which is attributed to a high defect density of the investigated ZnO material. Measurements of the spin dynamics under the influence of transverse as well as longitudinal external magnetic fields unambiguously reveal the intriguing connections of the electron spin with its nuclear and structural environment. © 2013 American Physical Society.
Identification of Outflows and Candidate Dual Active Galactic Nuclei in SDSS Quasars at z=0.8-1.6
Creators: name: Barrows, R. Scott
name: Lacy, Claud H. Sandberg
name: Kennefick, Julia
name: Comerford, Julia M.
name: Kennefick, Daniel
name: Berrier, Joel C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8
description: 19 pages, 12 figures, accepted for publication in The Astrophysical Journal
Rosa sepium L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: V. sepium L. Cat. 80. Verbreitet; auch Simplonsüdseite (Becherer). Bis2457m: Gr. St.Bernhard, zwischendemHospiz und dem Schweizer Zoll, einige Gruppen (Becherar 1952). Andere hohe Stellen sind: La Barma im Val des Dix, 2300 m (J.); ob Fully, 2130 m (Garns). Forma criocalyx Celak. - «Wallis» (Garns in Hegi, Flora IV, 3, S. 1539 [1924]). Forma albiflora Gaudin- 3:ZwischenSaas-Grund und der St.Josephskapelle (Becherer). Forma ochroleuca Bastard - l: Vionnaz (J.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Affine Kac-Moody groups and Lie algebras in the language of SGA3
Creators: name: Morita, Jun
name: Pianzola, Arturo
name: Shibata, Taiki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14L15, 17B67, 20G44

description: In infinite-dimensional Lie theory, the affine Kac-Moody Lie algebras and groups play a distinguished role due to their many applications to various areas of mathematics and physics. Underlying these infinite-dimensional objects there are closely related group schemes and Lie algebras of finite type over Laurent polynomial rings. The language of SGA3 is perfectly suited to describe such objects. The purpose of this short article is to provide a natural description of the affine Kac-Moody groups and Lie algebras using this language.
description: 13pages, some errors are corrected
Spin-orbit fields in asymmetric (001)-oriented GaAs/AlxGa 1-xAs quantum wells
Creators: name: Eldridge, P.S.
name: Hübner, Jens
name: Oertel, S.
name: Harley, R.T.
name: Henini, M.
name: Oestreich, Michael
Publisher: name: College Park, MD : American Physical Society
Year: 2011
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We measure simultaneously the in-plane electron g factor and spin-relaxation rate in a series of undoped inversion-asymmetric (001)-oriented GaAs/AlGaAs quantum wells by spin-quantum beat spectroscopy. In combination the two quantities reveal the absolute values of both the Rashba and the Dresselhaus coefficients and prove that the Rashba coefficient can be negligibly small despite huge conduction-band potential gradients which break the inversion symmetry. The negligible Rashba coefficient is a consequence of the "isomorphism" of conduction- and valence-band potentials in quantum systems where the asymmetry is solely produced by alloy variations. © 2011 American Physical Society.
Spin and velocity correlations in a confined two-dimensional fluid of disk-shaped active rotors
Creators: name: López-Castaño, Miguel Ángel
name: Márquez-Seco, Alejandro
name: Márquez-Seco, Alicia
name: Rodríguez-Rivas, Álvaro
name: Reyes, Francisco Vega
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the velocity autocorrelations in an experimental configuration of confined two-dimensional active rotors (disks). We report persistent small scale oscillations in both rotational and translational velocity autocorrelations, with their characteristic frequency increasing as rotational activity increases. While these small oscillations are qualitatively similar in all experiments, we found that, at strong particle rotational activity, the large scale particle spin fluctuations tend to vanish, with the small oscillations around zero persisting in this case, and spins remain predominantly and strongly anti-correlated at longer times. For weaker rotational activity, however, spin fluctuations become increasingly larger and angular velocities remain de-correlated at longer times. We discuss in detail how the autocorrelation oscillations are related to the rotational activity and why this feature is generically a signal of the emergence of chirality in the dynamics of a particulate system.
description: * Phys. Fluids, to appear (2023) * 11 pages, 8 figures. * For experiments data and movies see https://doi.org/10.5281/zenodo.5141570 * For the original angle tracking code see https://doi.org/10.5281/zenodo.7226254
Mirror symmetry breaking with limited enantioselective autocatalysis and temperature gradients: a stability survey
Creators: name: Blanco, Celia
name: Ribó, Josep M.
name: Crusats, Joaquim
name: El-Hachemi, Zoubir
name: Moyano, Albert
name: Hochberg, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We analyze limited enantioselective (LES) autocatalysis in a temperature gradient and with internal flow/recycling of hot and cold material. Microreversibility forbids broken mirror symmetry for LES in the presence of a temperature gradient alone. This symmetry can be broken however when the auto-catalysis and limited enantioselective catalysis are each localized within the regions of low and high temperature, respectively. This scheme has been recently proposed as a plausible model for spontaneous emergence of chirality in abyssal hydrothermal vents. Regions in chemical parameter space are mapped out in which the racemic state is unstable and bifurcates to chiral solutions.
Semiclassical two-step model for strong-field ionization
Creators: name: Shvetsov-Shilovski, N.I.
name: Lein, Manfred
name: Madsen, L.B.
name: Räsänen, E.
name: Lemell, C.
name: Burgdörfer, J.
name: Arbó, D.G.
name: Tokési, K.
Publisher: name: College Park, MD : American Physical Society
Year: 2016
Subjects: subject: Angular distribution
subject: Ionization potential
subject: Momentum
subject: Perturbation techniques
subject: Phase space methods
subject: Photoelectron spectroscopy
subject: Photoelectrons
subject: Photons
subject: Quantum chemistry
subject: Classical trajectory monte carlo
subject: Exact numerical solutions
subject: Interference patterns
subject: Momentum distributions
subject: Photoelectron angular distributions
subject: Quantitative agreement
subject: Semi-classical approximation
subject: Strong field ionization
subject: Ionization
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a semiclassical two-step model for strong-field ionization that accounts for path interferences of tunnel-ionized electrons in the ionic potential beyond perturbation theory. Within the framework of a classical trajectory Monte Carlo representation of the phase-space dynamics, the model employs the semiclassical approximation to the phase of the full quantum propagator in the exit channel. By comparison with the exact numerical solution of the time-dependent Schrödinger equation for strong-field ionization of hydrogen, we show that for suitable choices of the momentum distribution after the first tunneling step, the model yields good quantitative agreement with the full quantum simulation. The two-dimensional photoelectron momentum distributions, the energy spectra, and the angular distributions are found to be in good agreement with the corresponding quantum results. Specifically, the model quantitatively reproduces the fanlike interference patterns in the low-energy part of the two-dimensional momentum distributions, as well as the modulations in the photoelectron angular distributions. © 2016 American Physical Society.
Testing the local-void alternative to dark energy using galaxy pairs
Creators: name: Wang, F. Y.
name: Dai, Z. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The possibility that we live in a special place in the universe, close to the center of a large, radially inhomogeneous void, has attracted attention recently as an alternative to dark energy or modified gravity to explain the accelerating universe. We show that the distribution of orientations of galaxy pairs can be used to test the Copernican principle that we are not in a central or special region of Universe. The popular void models can not fit both the latest type Ia supernova, cosmic microwave background data and the distribution of orientations of galaxy pairs simultaneously. Our results rule out the void models at the $4σ$ confidence level as the origin of cosmic acceleration and favor the Copernican principle.
description: 5 pages, 3 figures, accepted for publication in MNRAS
Molekulare Analyse der Ureterentwicklung in der Maus
Creators: name: Foik, Anna Barbara
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Ureter development
subject: smooth muscle
subject: Ureterentwicklung
subject: Bmp4
subject: Smad4
subject: Smo
subject: Myocd
subject: Uretermesenchym
subject: glatte Muskulatur
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Positive weights and self-maps
Creators: name: Manin, Fedor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55P62, 55Q05

description: Spaces with positive weights are those whose rational homotopy type admits a large family of "rescaling" automorphisms. We show that finite complexes with positive weights have many genuine self-maps. We also fix the proofs of some previous related results.
description: 9 pages. v2 adds some clarifications and expanded arguments in response to referee report, no change to mathematical content. v3 fixes a formula on p. 7
Self Relevance predicts Aesthetic Appeal
Creators: name: Vinck, Martin
name: Bignardi, Giacomo
name: Vessel, Edward A.
name: Uran, Cem
name: Pasqualette, Laura Beatriz Borges Bastos
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Other Psychology
subject: Neuroscience and Neurobiology
subject: Life Sciences
subject: Cognition and Perception
subject: Cognitive Neuroscience
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Cognitive Psychology
subject: Arts and Humanities
subject: self-relevance
subject: aesthetics
subject: style transfer
subject: AI generated artwork
subject: artwork
subject: aesthetic appeal

description: Data and scripts for Vessel, Pasqualette, Uran, Koldehoff, Bignardi, Vinck (2023). Self-relevance predicts the aesthetic appeal of real and synthetic artworks generated via neural style transfer. Psychological Science.
Topological invariants and fibration structure of complete intersection Calabi-Yau four-folds
Creators: name: Gray, James
name: Haupt, Alexander S.
name: Lukas, Andre
Publisher: name: Berlin : Springer Verlag
Year: 2014
Subjects: subject: Differential and Algebraic Geometry
subject: F-Theory
subject: Superstring Vacua
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We investigate the mathematical properties of the class of Calabi-Yau four-folds recently found in ref. [1]. This class consists of 921,497 configuration matrices which correspond to manifolds that are described as complete intersections in products of projective spaces. For each manifold in the list, we compute the full Hodge diamond as well as additional topological invariants such as Chern classes and intersection numbers. Using this data, we conclude that there are at least 36,779 topologically distinct manifolds in our list. We also study the fibration structure of these manifolds and find that 99.95 percent can be described as elliptic fibrations. In total, we find 50,114,908 elliptic fibrations, demonstrating the multitude of ways in which many manifolds are fibered. A sub-class of 26,088,498 fibrations satisfy necessary conditions for admitting sections. The complete data set can be downloaded here.
Balance among gravitational instability, star formation, and accretion determines the structure and evolution of disk galaxies
Creators: name: Forbes, John C.
name: Krumholz, Mark R.
name: Burkert, Andreas
name: Dekel, Avishai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Over the past 10 Gyr, star-forming galaxies have changed dramatically, from clumpy and gas rich, to rather quiescent stellar-dominated disks with specific star formation rates lower by factors of a few tens. We present a general theoretical model for how this transition occurs, and what physical processes drive it, making use of 1D axisymmetric thin disk simulations with an improved version of the Gravitational Instability-Dominated Galaxy Evolution Tool (GIDGET) code. We show that at every radius galaxies tend to be in a slowly evolving equilibrium state wherein new accretion is balanced by star formation, galactic winds, and radial transport of gas through the disk by gravitational instability (GI) -driven torques. The gas surface density profile is determined by which of these terms are in balance at a given radius - direct accretion is balanced by star formation and galactic winds near galactic centers, and by transport at larger radii. We predict that galaxies undergo a smooth transition from a violent disk instability phase to secular evolution. This model provides a natural explanation for the high velocity dispersions and large clumps in z~2 galaxies, the growth and subsequent quenching of bulges, and features of the neutral gas profiles of local spiral galaxies.
description: 28 pages, 17 figures, submitted to MNRAS (comments welcome) - conspicuous typos corrected
High Affinity Mannotetraose as an Alternative to Dextran in ConA Based Fluorescent Affinity Glucose Assay Due to Improved FRET Efficiency
Creators: name: Locke, Andrea K.
name: Coté, Gerard L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Diabetes mellitus affects millions of people worldwide and requires that individuals tightly self-regulate their blood glucose levels to minimize the associated secondary complications. Continuous monitoring devices potentially offer patients a long-term means to tightly monitor their glucose levels. In recent years, fluorescent affinity sensors based on lectins (e.g., Concanavalin A (ConA)) have been implemented in such devices. Traditionally, these sensors pair the lectin with a multivalent ligand, like dextran, in order to develop a competitive binding assay that changes its fluorescent properties in response to the surrounding glucose concentrations. This work introduces a new type of fluorescent ligand for FRET-based assays in an attempt to improve the sensitivity of such assays. This ligand is rationally designed to present a core trimannose structure and a donor fluorophore in close proximity to one another. This design decreases the distance between the FRET donor and the FRET acceptors on ConA to maximize the FRET efficiency upon binding of the ligand to ConA. This work specifically compares the FRET efficiency and sensitivity of this new competing ligand with a traditional dextran ligand, showing that the new ligand has improved characteristics. This work also tested the long-term thermal stability of the assay based on this new competing ligand and displayed a MARD of less than 10% across the physiological range of glucose after 30 days incubation at 37 °C. Ultimately, this new type of fluorescent ligand has the potential to significantly improve the accuracy of continuous glucose monitoring devices based on the competitive binding sensing approach.
Bedeutung von Wirtszellproteasen für die Infektion mit dem Severe Acute Respiratory Syndrome-Coronavirus (SARS-CoV)
Creators: name: Glowacka, Ilona
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: SARS-Coronavirus
subject: Spike-Protein
subject: Cathepsin
subject: Furin
subject: TMPRSS2
subject: ACE2
subject: proteolytische Spaltung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Improving the precision of time-delay cosmography with observations of galaxies along the line of sight
Creators: name: Greene, Zach S.
name: Suyu, Sherry H.
name: Treu, Tommaso
name: Hilbert, Stefan
name: Auger, Matthew W.
name: Collett, Thomas E.
name: Marshall, Philip J.
name: Fassnacht, Christopher D.
name: Blandford, Roger D.
name: Bradac, Marua
name: Koopmans, Léon V. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In order to use strong gravitational lens time delays to measure precise and accurate cosmological parameters the effects of mass along the line of sight must be taken into account. We present a method to achieve this by constraining the probability distribution function of the effective line of sight convergence k_ext. The method is based on matching the observed overdensity in the weighted number of galaxies to that found in mock catalogs with k_ext obtained by ray-tracing through structure formation simulations. We explore weighting schemes based on projected distance, mass, luminosity, and redshift. This additional information reduces the uncertainty of k_ext from sigma_k $0.06 to ~0.04 for very overdense lines of sight like that of the system B1608+656. For more common lines of sight, sigma_k is reduced to ~<0.03, corresponding to an uncertainty of ~<3% on distance. This uncertainty has comparable effects on cosmological parameters to that arising from the mass model of the deflector and its immediate environment. Photometric redshifts based on g, r, i and K photometries are sufficient to constrain k_ext almost as well as with spectroscopic redshifts. As an illustration, we apply our method to the system B1608+656. Our most reliable k_ext estimator gives sigma_k=0.047 down from 0.065 using only galaxy counts. Although deeper multi-band observations of the field of B1608+656 are necessary to obtain a more precise estimate, we conclude that griK photometry, in addition to spectroscopy to characterize the immediate environment, is an effective way to increase the precision of time-delay cosmography.
description: 12 pages, 6 figures, 3 tables. Accepted for publication in The Astrophysical Journal
Facilitating Scientometrics in Learning Analytics and Educational Data Mining – the LAK Dataset
Creators: name: Dietze, Stefan
name: Davide, Taibi
name: D'Aquin, Mathieu
Publisher: name: Amsterdam : IOS Press
Year: 2017
Subjects: subject: Learning Analytics
subject: Educational Data Mining
subject: Linked Data
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: The Learning Analytics and Knowledge (LAK) Dataset represents an unprecedented corpus which exposes a near complete collection of bibliographic resources for a specific research discipline, namely the connected areas of Learning Analytics and Educational Data Mining. Covering over five years of scientific literature from the most relevant conferences and journals, the dataset provides Linked Data about bibliographic metadata as well as full text of the paper body. The latter was enabled through special licensing agreements with ACM for publications not yet available through open access. The dataset has been designed following established Linked Data pattern, reusing established vocabularies and providing links to established schemas and entity coreferences in related datasets. Given the temporal and topic coverage of the dataset, being a near-complete corpus of research publications of a particular discipline, it facilitates scientometric investigations, for instance, about the evolution of a scientific field over time, or correlations with other disciplines, what is documented through its usage in a wide range of scientific studies and applications.
Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233-3606
Creators: name: Leurini, S.
name: Codella, C.
name: Gusdorf, A.
name: Zapata, L.
name: Gomez-Ruiz, A.
name: Testi, L.
name: Pillai, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Studies of molecular outflows in high-mass young stellar objects reveal important information about the formation process of massive stars. We therefore selected the close-by IRAS 17233-3606 massive star-forming region to perform SiO observations with the SMA interferometer in the (5-4) line and with the APEX single-dish telescope in the (5-4) and (8-7) transitions. In this paper, we present a study of one of the outflows in the region, OF1, which shows several properties similar to jets driven by low-mass protostars, such as HH211 and HH212. It is compact and collimated, and associated with extremely high velocity CO emission, and SiO emission at high velocities. We used a state-of-the-art shock model to constrain the pre-shock density and shock velocity of OF1. The model also allowed us to self-consistently estimate the mass of the OF1 outflow. The shock parameters inferred by the SiO modelling are comparable with those found for low-mass protostars, only with higher pre-shock density values, yielding an outflow mass in agreement with those obtained for molecular outflows driven by early B-type young stellar objects. Our study shows that it is possible to model the SiO emission in high-mass star-forming regions in the same way as for shocks from low-mass young stellar objects.
description: Accepted for publication in Astronomy and Astrophysics
Untersuchung der Diffusion von Lithium- und Natrium-Ionen in Festkörpern unter Berücksichtigung der Dimensionalität des Kristallgitters
Creators: name: Volgmann, Kai Tristan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Dimensionality
subject: solid-state NMR spectroscopy
subject: impedance spectroscopy
subject: Li-Diffusion
subject: Na-Diffusion
subject: Dimensionalität
subject: Festkörper-NMR-Spektroskopie
subject: Impedanzspektroskopie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]