cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Variable gamma-ray emission from the Crab Nebula: short flares and long "waves"
Creators: name: Striani, E.
name: Tavani, M.
name: Vittorini, V.
name: Donnarumma, I.
name: Giuliani, A.
name: Pucella, G.
name: Argan, A.
name: Bulgarelli, A.
name: Colafrancesco, S.
name: Cardillo, M.
name: Costa, E.
name: Del Monte, E.
name: Ferrari, A.
name: Mereghetti, S.
name: Pacciani, L.
name: Pellizzoni, A.
name: Piano, G.
name: Pittori, C.
name: Rapisarda, M.
name: Sabatini, S.
name: Soffitta, P.
name: Trifoglio, M.
name: Trois, A.
name: Vercellone, S.
name: Verrecchia, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray emission from the Crab Nebula has been recently shown to be unsteady. In this paper, we study the flux and spectral variability of the Crab above 100 MeV on different timescales ranging from days to weeks. In addition to the four main intense and day-long flares detected by AGILE and Fermi-LAT between Sept. 2007 and Sept. 2012, we find evidence for week-long and less intense episodes of enhanced gamma-ray emission that we call "waves". Statistically significant "waves" show timescales of 1-2 weeks, and can occur by themselves or in association with shorter flares. We present a refined flux and spectral analysis of the Sept. - Oct. 2007 gamma-ray enhancement episode detected by AGILE that shows both "wave" and flaring behavior. We extend our analysis to the publicly available Fermi-LAT dataset and show that several additional "wave" episodes can be identified. We discuss the spectral properties of the September 2007 "wave"/flare event and show that the physical properties of the "waves" are intermediate between steady and flaring states. Plasma instabilities inducing "waves" appear to involve spatial distances l \sim 10^{16} cm and enhanced magnetic fields B \sim (0.5 - 1) mG. Day-long flares are characterized by smaller distances and larger local magnetic fields. Typically, the deduced total energy associated with the "wave" phenomenon (E_w \sim 10^{42} erg, where E_w is the kinetic energy of the emitting particles) is comparable with that associated to the flares, and can reach a few percent of the total available pulsar spindown energy. Most likely, flares and waves are the product of the same class of plasma instabilities that we show acting on different timescales and radiation intensities.
description: 11 pages, 10 figures
Understanding and engineering the biosynthesis of tropolone sesquiterpenoids in fungi
Creators: name: Schotte, Carsten
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: tropolone sesquiterpenoid
subject: biosynthesis
subject: pathway engineering
subject: humulene
subject: fungi
subject: Tropolonsesquiterpenoid
subject: Biosynthese
subject: Pathway Engineering
subject: Humulene
subject: Pilz
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Tropolone sesquiterpenoids (TS) are meroterpenoid natural products that share the conserved structural feature of a polyketide-derived tropolone nucleus connected to a humulene-derived macrocycle via a bridging dihydropyran ring. Here, the biosynthesis of the TS xenovulene A [1] was investigated using a combination of heterologous gene expression in the fungal host Aspergillus oryzae NSAR1 and in E. coli BL21. Heterologous expression experiments validated a minimal xenovulene A [1] biosynthetic gene set encoding eight dedicated enzymes involved in tropolone formation, humulene formation and DIELS-ALDER chemistry. Reconstitution of key enzymatic steps in vitro identified a new type of class I terpene cyclase (AsR6), that catalyzes the stereoselective formation of ɑ-humulene [2] from farnesyl pyrophosphate [3] or either enantiomer of nerolidyl pyrophosphate [4]. The biosynthesis of the structurally related bistropolones eupenifeldin [5] and noreupenifeldin B [6] in Phaeosphaeriaceae sp. CF-150626 was also investigated. Isotopic labelling studies identified an unusual oxidative ring contraction that putatively converts [5] into [6]. Through a combined genetic and chemical approach, a candidate biosynthetic gene cluster for [5]-biosynthesis was identified (the eup2 BGC). With EupR3 a homologue of AsR6 was characterized that stereoselectively produces 2Z-humulene [7], a geometric isomer of [2]. In cooperation with the Helmholtz Institute for Infection Research (Braunschweig, Germany) the crystal structure of AsR6 in the unliganded state and in complex with thiolo-S-diphosphate [8] and an in crystallo cyclized reaction product was obtained. A new pyrophosphate binding site was identified that consists of a binuclear magnesium cluster and a conserved lysine residue. Site- directed mutagenesis validated the motif and identified a key amino acid residue, L/M285, that drives the stereoselective formation of either [2] or [7]. New-to-nature TS natural products were produced through heterologous expression of different combinations of biosynthetic enzymes from the xenovulene A [1], eupenifeldin [5] and pycnidione [9] pathways. The rational design of expression experiments resulted in the formation and characterization of seven new derivatives. The obtained non-natural products differ in the nature of the polyketide moiety, the substitution pattern of the humulene macrocycle and the degree of hydroxylation.
Spätbronzezeitliche Scheibenkopfnadeln aus der Oberpfalz
Creators: name: Reinecke, Paul
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 19, Nr. 3 (1935)
Galium aparine L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G. Aparine L. Cat. 179. Ssp.eu-Aparine Briq. et Cavill. (G.Aparine L. str.) - Verbreitet. Bis 1790m: bei Saas-Fee (Huber). Ssp. spurium (L.) Hartman (G. spurium L.) - Bis2100m.- 3:Findelen beiZermatt, 1960m (Thellung 1919); ebenda, im obersten Roggenfeld, 2100 m (Becherer und Berset 1945). - 3a: Gabi (Becherer). - 4:Binn (E. Suter). Var. echinospermon (Wallr.) Rouy (G. Ap. var.Vaillantü[DC.] Koch) -2: Leytron (J.); Geronde bei Siders (P.). - 3: Saxon (J.); Ayer (Sulger); Visp-Stalden (A. Keller, P.); Täsch (Sulger); ZumseebeiZermatt (idem); Saastal,mehrfach (J.). - 3a: Alpien (A. Keller). - 4: Binn (J.). Hierher als Standortsform (Höhlenform): f. tenerum (Schleicher), mehrfach angegeben, z. B.: Beudon bei Fully (Garns); Stalden (Vispertal) (J.); Zeneggen(Wilczek). Var. leiospermon (Wallr.) Briq. et Cavill. (G. Ap. var. spurium [L. J Wimmer et Grab.) - 2: Ob Leuk(J.). -4:Binn(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
Nahinfrarotspektroskopische Bestimmung des Stickstoff- und Kohlenhydratstatus von Zierpflanzenstecklingen zur Beurteilung des Bewurzelungspotentials
Creators: name: Lohr, Dieter
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Adventitious root formation
subject: cutting quality
subject: non-destructive measurement
subject: Adventivwurzelbildung
subject: Stecklingsqualität
subject: zerstörungsfreie Bestimmung
subject: NIRS
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: [no abstract]
Mean Spectral Energy Distributions and Bolometric Corrections for Luminous Quasars
Creators: name: Krawczyk, Coleman M.
name: Richards, Gordon T.
name: Mehta, Sajjan S.
name: Vogeley, Michael S.
name: Gallagher, S. C.
name: Leighly, Karen M.
name: Ross, Nicholas P.
name: Schneider, Donald P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the mid-infrared (mid-IR) through ultraviolet (UV) spectral energy distributions (SEDs) of 119,652 luminous broad-lined quasars with 0.0641.6; the latter is a possible indicator of the strength of the accretion disk wind, which is expected to be SED dependent. Luminosity-dependent mean SEDs show that, relative to the high-luminosity SED, low-luminosity SEDs exhibit a harder (bluer) far-UV spectral slope, a redder optical continuum, and less hot dust. Mean SEDs constructed instead as a function of UV emission line properties reveal changes that are consistent with known Principal Component Analysis (PCA) trends. A potentially important contribution to the bolometric correction is the unseen extream-UV (EUV) continuum. Our work suggests that lower-luminosity quasars and/or quasars with disk-dominated broad emission lines may require an extra continuum component in the EUV that is not present (or much weaker) in high-luminosity quasars with strong accretion disk winds. As such, we consider four possible models and explore the resulting bolometric corrections. Understanding these various SED-dependent effects will be important for accurate determination of quasar accretion rates.
description: 19 pages, 18 figures
Measurement of the Σ beam asymmetry for the ω photo-production off the proton and the neutron at GRAAL
Creators: name: Vegna, V.
name: D'Angelo, A.
name: Bartalini, O.
name: Bellini, V.
name: Boquet, J. P.
name: Capogni, M.
name: Casano, L. E.
name: Castoldi, M.
name: Curciarello, F.
name: De Leo, V.
name: Didelez, J. P.
name: Di Salvo, R.
name: Fantini, A.
name: Franco, D.
name: Gervino, G.
name: Ghio, F.
name: Giardina, G.
name: Girolami, B.
name: Giusa, A.
name: Lapik, A.
name: Sandri, P. Levi
name: Lleres, A.
name: Mammoliti, F.
name: Mandaglio, G.
name: Manganaro, M.
name: Moricciani, D.
name: Mushkarenkov, A.
name: Nedorezov, V.
name: Randieri, C.
name: Rebreyend, D.
name: Rudnev, N.
name: Russo, G.
name: Schaerf, C.
name: Sperduto, M. L.
name: Sutera, M. C.
name: Turinge, A.
name: Zonta, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report on new measurements of the beam asymmetry for ω photo-production on proton and neutron in Hydrogen and Deuterium targets from the GRAAL collaboration. The beam asymmetry values are extracted from the reaction threshold (E_γ = 1.1 GeV in the free nucleon kinematics) up to 1.5 GeV of incoming photon energy. For the first time both the radiative and the three-pion decay channels are simultaneously investigated on the free proton. Results from the two decay channels are in agreement and provide important constraints for the determination of resonant state contributions to the ω production mechanism. First experimental results on the deuteron allow the extraction of the Σ beam asymmetry on quasi-free nucleons. Comparison of the results for free and quasi-free kinematics on the proton shows a generally reasonable agreement, similar to the findings in pseudo-scalar meson photo-production reactions. For the first time measurements on quasi-free neutrons are available, showing that both the strength and the angular distributions of the beam asymmetry are sensibly different from the results on the proton target.
description: 15 pages, 10 figures and 1 table
Determinanten für die Membranpassage von Tat-abhängig transportierten Proteinen in Escherichia coli
Creators: name: Rathmann, Claudia
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Twin arginine translocation
subject: Phospholipide
subject: TatA-Selbst-Interaktion
subject: Phospholipids
subject: TatA self-interaction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Methanation of carbon dioxide over ceria-praseodymia promoted Ni-alumina catalysts. Influence of metal loading, promoter composition and alumina modifier
Creators: name: Lechkar, Ali
name: Barroso-Bogeat, Adrian
name: Blanco, Ginesa
name: Pintado, Jose M.
name: Begrani, Mohamed Soussi el
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two series of ceria-praseodymia promoted Ni-alumina catalysts were prepared from two different commercial modified alumina supports by the incipient wetness impregnation method in two successive steps.The resulting materials were characterized in terms of their physico-chemical properties. Furthermore, the as-prepared catalysts were tested for the CO2 methanation reaction. The influence of the nominal Ni loading, molar composition of the Ce-Pr mixed oxide promoter and alumina modifier on the catalytic performance was carefully analyzed. Among these three composition parameters, the alumina dopant and especially the Ni content appear to have by far a much more pronounced effect on both the CO2 conversion and CH4 selectivity as compared to the Ce-Pr mixed oxide composition.
description: 12 pages, 7 figures
Statistical distribution of current helicity in solar active regions over the magnetic cycle
Creators: name: Gao, Y.
name: Sakurai, T.
name: Zhang, H.
name: Kuzanyan, K.
name: Sokoloff, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The current helicity in solar active regions derived from vector magnetograph observations for more than 20 years indicates the so-called hemispheric sign rule; the helicity is predominantly negative in the northern hemisphere and positive in the southern hemisphere. In this paper we revisit this property and compare the statistical distribution of current helicity with Gaussian distribution using the method of normal probability paper. The data sample comprises 6630 independent magnetograms obtained at Huairou Solar Observing Station, China, over 1988-2005 which correspond to 983 solar active regions. We found the following. (1) For the most of cases in time-hemisphere domains the distribution of helicity is close to Gaussian. (2) At some domains (some years and hemispheres) we can clearly observe significant departure of the distribution from a single Gaussian, in the form of two- or multi-component distribution. (3) For the most non-single-Gaussian parts of the dataset we see co-existence of two or more components, one of which (often predominant) has a mean value very close to zero, which does not contribute much to the hemispheric sign rule. The other component has relatively large value of helicity that often determines agreement or disagreement with the hemispheric sign rule in accord with the global structure of helicity reported by Zhang et al. (2010).
Contenidos digitales. Creación y modificación de recursos digitales (Nivel B1)
Creators: name: Valverde-Berrocoso, Jesús
Publisher: name: Universidad de Extremadura
Year: 2023
Subjects: Competencia Digital Docente
Formación del Profesorado Universitario

description: 1. Herramientas de autor para la creación y modificación de materiales educativos digitales

Documentos digitales y estándares abiertos
eXeLearning básico: elaborar y adaptar materiales educativos digitales.
2. Criterios de calidad de los materiales educativos digitales

Introducción a la norma UNE 71362-2020
3. Iniciación al Diseño Universal para el Aprendizaje (DUA)

Principios básicos del DUA.
Optische Strukturen zur Einkopplung und Lichtverteilung in vollständig polymerbasierten, planaren Systemen
Creators: name: Günther, Axel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Polymer waveguides
subject: coupling structures
subject: integrated optics
subject: Polymerwellenleiter
subject: Koppelstrukturen
subject: integrierte Optik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Operating experience with electron cloud clearing electrodes at DAFNE
Creators: name: Zobov, M.
name: Alesini, D.
name: Drago, A.
name: Gallo, A.
name: Guiducci, S.
name: Milardi, C.
name: Stella, A.
name: De Santis, S.
name: Demma, T.
name: Raimondi, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: During the current run of an electron-positron collider DAFNE special electrodes for electron cloud suppression have been inserted in all dipole and wiggler magnets of the positron ring. In this paper we discuss the impact of these electrodes on beam dynamics and overall collider performance. In particular we report results of measurements such as e-cloud instabilities growth rate, transverse beam size variation, tune shifts along the bunch train etc. with the electrodes switched on and off that clearly indicate the effectiveness of the electrodes for e-cloud suppression.
description: presented at ECLOUD'12: Joint INFN-CERN-EuCARD-AccNet Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 5-9 June 2012
Optische Sensorsysteme auf Polymerbasis : neuartige FBG- und WGM-Strukturen
Creators: name: Petermann, Ann Britt
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Optical resonators
subject: optical analysis
subject: polymer waveguides
subject: Optische Resonatoren
subject: optische Analytik
subject: Polymerwellenleiter
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Effects of randomness on the critical temperature in quasi-two-dimensional organic superconductors
Creators: name: Nakhmedov, Enver
name: Alekperov, Oktay
name: Oppermann, Reinhold
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The effects of non-magnetic disorder on the critical temperature T_c of organic weak-linked layered superconductors with singlet in-plane pairing are considered. A randomness in the interlayer Josephson coupling is shown to destroy phase coherence between the layers and T_c suppresses smoothly in a large extent of the disorder strength. Nevertheless the disorder of arbitrarily high strength can not destroy completely the superconducting phase. The obtained quasi-linear decrease of the critical temperature with increasing disorder strength is in good agreement with experimental measurements.
description: 5 pages, 2 figures
Lineare Koordinationspolymere aus Metall-Cyclam-Komplex-Baueinheiten : Synthesestrategien und Strukturen
Creators: name: Platz, Georg
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Aza complexes
subject: one-dimensional coordination polymers
subject: dicarboxylates
subject: single crystal growth
subject: tetraazamacrocyles
subject: Aza-Komplexe
subject: eindimensionale Koordinationspolymere
subject: Cyclam
subject: Dicarboxylate
subject: Einkristallzucht
subject: Tetraazamakrocyclen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Entwicklung und Evaluation von Sporttrainingsprogrammen zur Förderung der Einsatzfähigkeit von Polizeivollzugsbeamtinnen und Polizeivollzugsbeamten : Untersuchung an Polizeivollzugsbeamtinnen und -beamten unter besonderer Berücksichtigung des beruflichen Belastungsprofils
Creators: name: Rosenbaum, Christel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Operational ability
subject: police occupational sport
subject: police training programme
subject: physical performance in the police
subject: Einsatzfähigkeit
subject: Dienstsport Polizei
subject: Trainingsprogramme Polizei
subject: körperliche Leistungsfähigkeit im Polizeiberuf
subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::790 | Freizeitgestaltung, Darstellende Kunst::796 | Sport

description: [no abstract]
The structure of the merging RCS 231953+00 Supercluster at z ~ 0.9
Creators: name: Faloon, A. J.
name: Webb, T. M. A.
name: Ellingson, E.
name: Yan, R.
name: Gilbank, David G.
name: Geach, J. E.
name: Noble, A. G.
name: Barrientos, L. F.
name: Yee, H. K. C.
name: Gladders, M.
name: Richard, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The RCS 2319+00 supercluster is a massive supercluster at z=0.9 comprising three optically selected, spectroscopically confirmed clusters separated by <3 Mpc on the plane of the sky. This supercluster is one of a few known examples of the progenitors of present-day massive clusters (10^{15} Msun by z~0.5). We present an extensive spectroscopic campaign carried out on the supercluster field resulting, in conjunction with previously published data, in 1961 high confidence galaxy redshifts. We find 302 structure members spanning three distinct redshift walls separated from one another by ~65 Mpc. The component clusters have spectroscopic redshifts of 0.901, 0.905 and 0.905. The velocity dispersions are consistent with those predicted from X-ray data, giving estimated cluster masses of ~10^{14.5} - 10^{14.9} Msun. The Dressler-Shectman test finds evidence of substructure in the supercluster field and a friends-of-friends analysis identified 5 groups in the supercluster, including a filamentary structure stretching between two cluster cores previously identified in the infrared by Coppin et al. (2012). The galaxy colors further show this filamentary structure to be a unique region of activity within the supercluster, comprised mainly of blue galaxies compared to the ~43-77% red-sequence galaxies present in the other groups and cluster cores. Richness estimates from stacked luminosity function fits results in average group mass estimates consistent with ~10^{13} Msun halos. Currently, 22% of our confirmed members reside in >~10^{13} Msun groups/clusters destined to merge onto the most massive cluster, in agreement with the massive halo galaxy fractions important in cluster galaxy pre-processing in N-body simulation merger tree studies.
description: 24 pages, 15 figures, 6 tables, accepted for publication in ApJ
Matter-wave optics with Bose-Einstein condensates in microgravity
Creators: name: Rudolph, Jan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Bose-Einstein condensates
subject: matter-waves
subject: microgravity
subject: Bose-Einstein Kondensate
subject: Materiewellen
subject: Mikrogravitation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Antiferromagnetic Exchange Interactions in Ni$_{2}$Mn$_{1.4}$In$_{0.6}$ ferromagnetic Heusler alloy
Creators: name: Priolkar, K. R.
name: Bhobe, P. A.
name: Lobo, D. N.
name: D'Souza, S. W.
name: Barman, S. R.
name: Chakrabarti, A.
name: Emura, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetism in Ni-Mn-Z (Z = Ga,In,Sn,Sb) Heusler alloys has so far been predominantly attributed to Rudermann-Kittel-Kasuya-Yoshida type interactions between Mn atoms. We investigate magnetic interactions in one such alloy, Ni$_{2}$Mn$_{1.4}$In$_{0.6}$ and attempt to explain the origin of antiferromagnetic (AFM) interactions that coexist with ferromagnetic ones. Through the combination of x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD), we find that Ni plays an important role along with Mn in the overall magnetism. A significant hybridization that develops between Mn and Ni orbitals results in a small antiferromagnetic moment at Ni sites. The shift in the XMCD hysteresis loops in the martensitic phase suggests that antiferromagnetism results from superexchange like interactions between Mn atoms mediated by Ni.
description: Main paper 6 pages + supplementary material
Duality in multi-channel Luttinger Liquid with local scatterer
Creators: name: Yurkevich, Igor V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have devised a general scheme that provides exact results for the scaling dimensions of all allowed in multi-channel Luttinger Liquids local perturbations. The technique developed provides universal description and establishes relations between scaling dimensions of perturbations in different phases of Luttinger Liquid. These multiple relations between scaling dimensions are universal. They are valid for all Luttinger Liquids with arbitrary current-current and density-density interactions. We have also established duality transformation between different subsets of Luttinger Liquid phases known for single-channel liquid as duality between weak link and weak scatterer limits.
Erstellung und Charakterisierung polyploider Genotypen von Calluna vulgaris (L.) Hull
Creators: name: Przybyla, Annett
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Polyploidy
subject: heather
subject: bud-bloomers
subject: flow cytometry
subject: Polyploidie
subject: Heide
subject: Knospenblütigkeit
subject: simple sequence repeats
subject: Durchflusscytometrie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Epitaxie virtueller Germaniumsubstrate für III-V-Halbleiter
Creators: name: Grimm, Andreas
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Silicon
subject: gallium arsenide
subject: Germanium
subject: Silizium
subject: Galliumarsenid
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: [no abstract]
Spectral Methods in General Relativity and Large Randall-Sundrum II Black Holes
Creators: name: Abdolrahimi, Shohreh
name: Cattoën, Céline
name: Page, Don N.
name: Yaghoobpour-Tari, Shima
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using a novel numerical spectral method, we have found solutions for large static Randall-Sundrum II (RSII) black holes by perturbing a numerical AdS_5-CFT_4 solution to the Einstein equation with a negative cosmological constant Lambda that is asymptotically conformal to the Schwarzschild metric. We used a numerical spectral method independent of the Ricci-DeTurck-flow method used by Figueras, Lucietti, and Wiseman for a similar numerical solution. We have compared our black-hole solution to the one Figueras and Wiseman have derived by perturbing their numerical AdS_5-CFT_4 solution, showing that our solution agrees closely with theirs. We have also deduced the new results that to first order in 1/(-ΛM^2), the Hawking temperature and entropy of an RSII static black hole have the same values as the Schwarzschild metric with the same mass, but the horizon area is increased by about 4.7/(-Λ).
description: 24 pages, 14 figures. arXiv admin note: substantial text overlap with arXiv:1206.0708
Galium parisiense L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G.parisiense L. Cat. 179. Var. trichocarpum Tausch (var. typicum Beck; G. litigiosum DC.) - 2: Chätaignier (Garns). Var. leiocarpum Tausch (var. anglicum [Hudson] Beck) - 2:Tassonnieres (Garns).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The roles of star formation and AGN activity of IRS sources in the HerMES fields
Creators: name: Feltre, Anna
name: Hatziminaoglou, Evanthia
name: Hernán-Caballero, Antonio
name: Frtiz, Jacopo
name: Franceschini, Alberto
name: Bock, Jamie
name: Cooray, Asantha
name: Farrah, Duncan
name: Gonzalez-Solares, Eduardo A.
name: Ibar, Edo
name: Isaak, Kate G.
name: Faro, Barbara Lo
name: Marchetti, Lucia
name: Oliver, Seb J.
name: Page, Mathew J.
name: Rigopoulou, Dimitra
name: Roseboom, Isaac G.
name: Symeonidis, Myrto
name: Vaccari, Mattia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work we explore the impact of the presence of an active galactic nucleus (AGN) on the mid- and far-infrared (IR) properties of galaxies as well as the effects of simultaneous AGN and starburst activity in these same galaxies. To do this we apply a multi-component, multi-band spectral synthesis technique to a sample of 250 micron selected galaxies of the Herschel Multi-tiered Extragalactic Survey, with IRS spectra available for all galaxies. Our results confirm that the inclusion of the IRS spectra plays a crucial role in the spectral analysis of galaxies with an AGN component improving the selection of the best-fit hot dust model (torus). We find a correlation between the obscured star formation rate (SFR) derived from the IR luminosity of the starburst component, SFR_IR and SFR_PAH, derived from the luminosity of the PAH features, L_PAH, with SFR_FIR taking higher values than SFR_PAH. The correlation is different for AGN- and starburst-dominated objects. The ratio of L_PAH to that of the starburst component, L_PAH/L_SB, is almost constant for AGN-dominated objects but decreases with increasing L_SB for starburst-dominated objects. SFR_FIR increases with the accretion luminosity, L_acc, with the increase less prominent for the very brightest, unobscured AGN-dominated sources. We find no correlation between the masses of the hot and cold dust components. We interpret this as a non-constant fraction of gas driven by the gravitational effects to the AGN while the starburst is ongoing. We also find no evidence of the AGN affecting the temperature of the cold dust component, though this conclusion is mostly based on objects with a non-dominant AGN component. We conclude that our findings do not provide evidence that the presence of AGN affects the star formation process in the host galaxy, but rather that the two phenomena occur simultaneously over a wide range of luminosities.
description: 12 pages, 12 figures, 2 tables. Accepted for publication in MNRAS
Untersuchungen zur Sterilfiltration von hochkonzentrierten pharmazeutischen Proteinlösungen
Creators: name: Guillaume, Svenja
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Pharmaceutical proteins
subject: sterile filtration
subject: stability of solution
subject: Pharmazeutische Proteine
subject: Sterilfiltration
subject: Lösungsstabilität
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Exclusive diffractive photon bremsstrahlung at the LHC
Creators: name: Lebiedowicz, Piotr
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate differential distributions for the $p p \to p p γ$ reaction at the LHC energy $\sqrt{s} = 14$ TeV. We consider diffractive classical bremsstrahlung mechanisms including effects of non point-like nature of protons. In addition, we take into account (vector meson)-pomeron, photon-pion as well as photon-pomeron exchange processes for the first time in the literature. Predictions for the total cross section and several observables related to these processes e.g. differential distributions in pseudorapidities and transverse momenta of photons or protons are shown and discussed. The integrated diffractive bremsstrahlung cross section ($E_γ>100$ GeV) is only of the order of $μ$b. We try to identify regions of the phase space where one of the mechanisms dominates. The classical bremsstrahlung dominates at large forward/backward photon pseudorapidities, close to the pseudorapidities of scattered protons. In contrast, the photon-pomeron (pomeron-photon) mechanism dominates at midrapidities but the related cross section is rather small. In comparison the virtual-omega rescattering mechanism contributes at smaller angles of photons (larger photon rapidities). Photons in the forward/backward region can be measured by the Zero Degree Calorimeters (ZDCs) installed in experiments at the LHC while the midrapidity photons are difficult to measure (small cross section, small photon transverse momenta). Protons could be measured by ALFA detector (ATLAS) or TOTEM detector at CMS. The exclusivity could be checked with the help of main central detectors.
description: 16 pages, 12 figures
Bürger werden initiativ : akteurssoziologische Hintergründe eines lokalen Protests aufgrund eines formalen und symbolischen Beteiligungsdefizits
Creators: name: Krätzig, Sebastian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Local deficits of participation
subject: citizens' initiatives in rural areas
subject: planned constructions in the context of intensive livestock farming
subject: Lokale Beteiligungsdefizite
subject: Bürgerinitiativen in ländlichen Räumen
subject: Bauvorhaben im Kontext von Massentierhaltung
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::320 | Politik

description: [no abstract]
Magnetization of neutron star matter
Creators: name: Dong, Jianmin
name: Zuo, Wei
name: Gu, Jianzhong
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The magnetization of neutron star matter in magnetic fields is studied by employing the FSUGold interaction. It is found that the magnetic susceptibilities of the charged particles (proton, electron and muon) can be larger than that of neutron. The effects of the anomalous magnetic moments (AMM) of each component on the magnetic susceptibility are examined in detail. It is found that the proton and electron AMM affect their respective magnetic susceptibility evidently in strong magnetic fields. In addition, they are the protons instead of the electrons that contribute most significantly to the magnetization of the neutron star matter in a relative weak magnetic field, and the induced magnetic field due to the magnetization can be appear to be very large. Finally, the effect of the density-dependent symmetry energy on the magnetization is discussed.
description: 6 pages, 3 figures
Eine neu aufgefundene Arbeit des Aachener Goldschmieds Hans von Reutlingen und ihre neogotische Kopie in einem Reliquiar des Aachener Domschatzes
Creators: name: Grimme, Ernst Günther
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 43 (1972): Aachener Kunstblätter
Diffusive Suppression of AC-Stark Shifts in Atomic Magnetometers
Creators: name: Sulai, I. A.
name: Wyllie, R.
name: Kauer, M.
name: Smetana, G. S.
name: Wakai, R. T.
name: Walker, T. G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: In atomic magnetometers, the vector AC-Stark shift associated with circularly polarized light generates spatially varying effective magnetic fields which limit the magnetometer response and serve as sources of noise. We describe a scheme whereby optically pumping a small sub-volume of the magnetometer cell and relying on diffusion to transport polarized atoms allows a magnetometer to be operated with minimal sensitivity to the AC-Stark field.
Biochemische und physiologische Untersuchungen zum Einsatz von Mikroalgen zur Entfernung des Antiepileptikums Carbamazepin aus Abwässern
Creators: name: Haase, Sandra Mareike
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Pharmaceuticals
subject: carbamazepine
subject: microalgae
subject: biological filters
subject: Arzneimittel
subject: Carbamazepin
subject: Mikroalgen
subject: biologische Filter
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Der Aachener Domschatz. Eine Rückschau auf die Ausstellung im Krönungssaal des Aachener Rathauses
Creators: name: Grimme, Ernst Günther
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 43 (1972): Aachener Kunstblätter
Wissensorientierte Unternehmenskultur : theoretische Analyse und Gestaltungsmöglichkeiten
Creators: name: Gurnhofer, Daniel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Knowledge management
subject: corporate culture
subject: epistemology
subject: Wissensmanagement
subject: Unternehmenskultur
subject: Epistemologie
subject: Dewey Decimal Classification::600 | Technik::650 | Management

description: [no abstract]
Contenidos digitales. Creación y modificación de recursos digitales (Nivel B2)
Creators: name: Valverde-Berrocoso, Jesús
Publisher: name: Universidad de Extremadura
Year: 2023
Subjects: Competencia Digital Docente
Formación del Profesorado Universitario

description: 1. Fundamentos pedagógicos para la creación y modificación de materiales educativos digitales.

Bases teórico-pŕacticas para el diseño didáctico (I): principios de enseñanza.
Bases teórico-pŕacticas para el diseño didáctico (II): modelos de enseñanza.
2. Herramientas de autor y criterios de calidad de los materiales educativos digitales.

eXeLearning avanzado: creación y adaptación de materiales educativos digitales.
La norma UNE 71362-2020: calidad de los materiales educativos digitales.
3. Diseño Universal para el Aprendizaje (DUA).

DUA en el diseño y reutilización de los materiales educativos digitales.
Observation of spontaneous quantum fluctuations in photon absorption by atoms
Creators: name: Mitsui, Takahisa
name: Aoki, Kenichiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Fluctuations in light absorption by atoms are observed by applying laser light on rubidium atoms and measuring the transmitted light intensity fluctuations. These fluctuations are spontaneous noise, which are generic to photon atom interactions. By making use of the sub-shot noise random signal detection technology, we have measured the spectra at sub-shot noise levels to reveal their rich nature, which had previously been unobserved. The effects of atoms transiting the laser beam, Rabi flopping in the optical transitions and Larmor precession of the magnetic moment are observed in the spectra. The properties of the fluctuations reflect not only the quantum behavior of atoms, but also that of light.
description: 6pages, 5 figures
Gas Phase Ions in Protoplanetary Disks from Collisions of Solids
Creators: name: Penner, Jakob
name: Wurm, Gerhard
name: Teiser, Jens
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Ionization is important for magnetohydrodynamics and chemistry in protoplanetary disks but known ionization sources are often weak along the midplane. We present, for the first time, data from a laboratory experiment, where we measure ions from colliding mm-basalt grains emitted into the surrounding gas phase. This positive detection implies that very basic collisions in early phases of planet formation are sources of ionization. The midplane of protoplanetary disks might be ionized despite the lack of intense radiation sources.
Untersuchung radioaktiver Partikel mittels Sekundärionen-Flugzeit-Massenspektrometrie
Creators: name: Hamann, Linda
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Hot particles
subject: TOF-SIMS
subject: SNMS
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Thallium 7p lifetimes derived from experimental data and ab initio calculations of scalar polarizabilities
Creators: name: Safronova, M. S.
name: Majumder, P. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Two different theoretical methods have been used to complete a new calculation of polarizability in the thallium 6p_{1/2}, 7s, and 7p_{1/2} states. The predictions of the two methods agree to within 1% for the 6p_{1/2} and 7s states and 2% for 7p_{1/2} state. We find that the theoretical expression for the 6p_{1/2} - 7s transition polarizability difference is dominated (greater than 90% contribution) by mixing of the 7s state with the 7p_{1/2} and 7p_{3/2} states. By comparing the theoretical expression to an existing Stark shift measurement [Doret et al., Phys. Rev. A 66, 052504 (2002)], new, highly-accurate values for the thallium 7p excited-state lifetimes have been extracted. The scalar polarizability of the 7p_{1/2} state is also computed, anticipating an experimental determination of this quantity, which will then enable a high-precision determination of the 6d_{j}-7p_{j^{\prime}} transition rates and provide a benchmark test of the two theoretical approaches in the near future.
description: 5 pages, 2 figures
Organic Topological Insulators in Organometallic Lattices
Creators: name: Wang, Z. F.
name: Liu, Zheng
name: Liu, Feng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological insulators (TIs) are a recently discovered class of materials having insulating bulk electronic states but conducting boundary states distinguished by nontrivial topology. So far, several generations of TIs have been theoretically predicted and experimentally confirmed, all based on inorganic materials. Here, based on first-principles calculations, we predict a family of two-dimensional organic TIs made of organometallic lattices. Designed by assembling molecular building blocks of triphenyl-metal compounds with strong spin-orbit coupling into a hexagonal lattice, this new classes of organic TIs are shown to exhibit nontrivial topological edge states that are robust against significant lattice strain. We envision that organic TIs will greatly broaden the scientific and technological impact of TIs.
description: 17 pages, 3 figures
Einfluss der Ladungsträgerdynamik auf die Spinrelaxation in GaAs
Creators: name: Lonnemann, Jan Gerrit
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Spin relaxation
subject: transport properties
subject: gallium arsenide
subject: Spinrelaxation
subject: Transportmechanismen
subject: Galliumarsenid
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Crystal field and magnetism of Pr$^{3+}$ and Nd$^{3+}$ ions in orthorhombic perovskites
Creators: name: Novak, P.
name: Knizek, K.
name: Marysko, M.
name: Jirak, Z.
name: Kunes, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Fifteen parameters characterizing the crystal field of rare-earth ions in the RMO$_3$ perovskites (R = Pr, Nd, M = Ga, Co) are calculated by expanding the local Hamiltonian expressed in the basis of Wannier functions into a series of spherical tensor operators. The method contains a single adjustable parameter that characterizes the hybridization of R($4f$) states with the states of oxygen ligands. Subsequently the energy levels and magnetic moments of trivalent R ion are determined by diagonalization of an effective Hamiltonian which, besides the crystal field, contains the $4f$ electron-electron repulsion, spin-orbit coupling and interaction with magnetic field. In the Ga compounds the energy levels of the ground multiplet agree within few meV with those determined experimentally by other authors. For all four compounds in question the temperature dependence of magnetic susceptibility is measured on polycrystalline samples and compared with the results of calculation. For NdGaO$_3$ theory is also compared with the magnetic measurements on a single crystal presented by Luis {\it et al.} Phys. Rev. B {\bf 58}, 798 (1998). A good agreement between the experiment and theory is found.
Untersuchung der Biosynthese des Ambruticin-Mittelfragments
Creators: name: Hemmerling, Franziska
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Polyketide-biosynthesis
subject: ANL-enzyme
subject: Ambruticin
subject: Polyketid-Biosynthese
subject: ANL-Enzym
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
On Measuring the CMB Temperature at Redshift 0.89
Creators: name: Sato, Mayumi
name: Reid, Mark J.
name: Menten, Karl M.
name: Carilli, Chris L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report on a measurement of the temperature of the cosmic microwave background radiation field, T_CMB, at z = 0.88582 by imaging HC3N (3-2) and (5-4) absorption in the foreground galaxy of the gravitationally lens magnified radio source PKS 1830-211 using the Very Long Baseline Array and the phased Very Large Array. Low-resolution imaging of the data yields a value of Trot = 5.6+2.5-0.9 K, for the rotational temperature, Trot, which is consistent with the temperature of the cosmic microwave background at the absorber's redshift of 2.73(1+z) K. However, our high-resolution imaging reveals that the absorption peak position of the foreground gas is offset from the continuum peak position of the synchrotron radiation from PKS 1830-211 SW, which indicates that the absorbing cloud is covering only part of the emission from PKS 1830-211, rather than the entire core-jet region. This changes the line-to-continuum ratios, and we find Trot between 1.1 and 2.5 K, which is lower than the expected value. This shows that previous, Trot, measurements could be biased due to unresolved structure.
description: 13 pages, 3 figures, accepted for publication in ApJ