cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamics and physical interpretation of quasi-stationary states in systems with long-range interactions
Creators: name: Filho, T. M. Rocha
name: Santana, A. E.
name: Moura, J. R. S.
name: Amato, M. A.
name: Figueiredo, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Although the Vlasov equation is used as a good approximation for a sufficiently large $N$, Braun and Hepp have showed that the time evolution of the one particle distribution function of a $N$ particle classical Hamiltonian system with long range interactions satisfies the Vlasov equation in the limit of infinite $N$. Here we rederive this result using a different approach allowing a discussion of the role of inter-particle correlations on the system dynamics. Otherwise for finite N collisional corrections must be introduced. This has allowed the a quite comprehensive study of the Quasi Stationary States (QSS) but many aspects of the physical interpretations of these states remain unclear. In this paper a proper definition of timescale for long time evolution is discussed and several numerical results are presented, for different values of $N$. Previous reports indicates that the lifetimes of the QSS scale as $N^{1.7}$ or even the system properties scales with $\exp(N)$. However, preliminary results presented here shows indicates that time scale goes as $N^2$ for a different type of initial condition. We also discuss how the form of the inter-particle potential determines the convergence of the $N$-particle dynamics to the Vlasov equation. The results are obtained in the context of following models: the Hamiltonian Mean Field, the Self Gravitating Ring Model, and a 2-D Systems of Gravitating Particles. We have also provided information of the validity of the Vlasov equation for finite $N$, i. e.\ how the dynamics converges to the mean-field (Vlasov) description as $N$ increases and how inter-particle correlations arise.
Focke-Museum (Hrsg.), Graben für Germanien. Archäologie unterm Hakenkreuz
Creators: name: Jansen, Christian
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2016

description: Rezension zu: Focke-Museum (Hrsg.), Graben für Germanien. Archäologie unterm Hakenkreuz. Unter Mitarbeit von Sandra Geringer, Frauke von der Haar, Uta Halle, Dirk Mahsarski und Karin Walter. Theiss Verlag, Stuttgart 2013. € 29,95. ISBN 978-3-8062-2673-7. 216 Seiten, 150 Abbildungen.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 93 (2015)
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 17, Nr. 2 (1933)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2016

description: Bronzespiegel und Flasche der Frühlatènezeit von Flochheim a. M....81-87
Frühlatènegräber bei Crumstadt, Kr. Groß-Gerau...88-91
Ösenhalsringe in Ägypten...91-94
Zur Inschrift von Nickenich...95-104
Diana Tifatina am Limes...104-105
Eine Mädchenstatuette aus Köln...106-110
Beinplatten zur Bogenversteifung aus römischen Waffenplätzen...110-114
Die Inschrift der Bronzepfanne von Güttingen...114-118
Frühmittelalterliche Imitationen antiker Kameen...118-124
Kleine Mitteilungen...124-128
Fundchronik...129-143
Karl Zschocke und Ernst Preuschen, Das urzeitliche Bergbaugebiet von Mühlbach- Bischofshofen...143-146
Neuerscheinungen...155-168
Alexander Scharff, Die Altertümer der Vor- und Frühzeit Ägyptens...147
Hubert Schmidt, Cucuteni in der oberen Moldau, Rumänien. Die befestigte Siedlung mit bemalter Keramik von der Steinkupferzeit bis in die vollentwickelte Bronzezeit...147-150
Nils Åberg, Bronzezeitliche und früheisenzeitliche Chronologie, Teil III, Kupfer- und Frühbronzezeit...150-152
Aargauische Heimatgeschichte...152-153
W. Vermeulen, Een romeinsch Grafveld op den Hunnerberg te Nymegen...153-155
Novel approaches to optomechanical transduction
Creators: name: Černotík, Ondřej
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Optomechanics
subject: hybrid quantum systems
subject: frequency conversion
subject: Optomechanik
subject: hybride Quantensysteme
subject: Frequenzkonversion
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Euphrasia nitidula Reuter
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E. nitidula Reuter (E. nemorosa auct.) Cat. 281. l: Les Combasses bei Salvan (J.); Les Marecottes (Coquoz). - 3: Sembrancher (Zahn in herb. dePalezieux).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Clues on void evolution I: Large scale galaxy distributions around voids
Creators: name: Ceccarelli, L.
name: Paz, D.
name: Lares, M.
name: Padilla, N.
name: Lambas, D. García
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform a statistical study focused on void environments. We examine galaxy density profiles around voids in the SDSS, finding a correlation between void--centric distance to the shell of maximum density and void radius when a maximum in overdensity exists. We analyze voids with and without a surrounding over-dense shell in the SDSS. We find that small voids are more frequently surrounded by over-dense shells whereas the radial galaxy density profile of large voids tends to rise smoothly towards the mean galaxy density. We analyse the fraction of voids surrounded by overdense shells finding a continuous trend with void radius. The differences between voids with and without an overdense shell around them can be understood in terms of whether the voids are, on average, in the process of collapsing or continuing their expansion, respectively, in agreement with previous theoretical expectations. We use numerical simulations coupled to semi-analytic models of galaxy formation in order to test and interpret our results. The very good agreement between the mock catalog results and the observations provides additional support to the viability of a LCDM model to reproduce the large scale structure of the universe as defined by the void network, in a way which has not been analysed previously.
description: Accepted for Publication in MNRAS, 9 pages, 7 figures
Zur Schallentstehung an den Seitenkanten von Wölbklappen für Windenergieanlagen
Creators: name: Brand, Carl Robert
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Side edge noise
subject: plain flap
subject: wind turbine
subject: Seitenkantenschall
subject: Wölbklappen
subject: Windenergieanlagen
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Archäometrie am Hildesheimer Domschatz
Creators: name: Fellenger, Daniel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Archaeometry
subject: chemical analysis
subject: art history
subject: Archäometrie
subject: Analytik
subject: Kunstgeschichte
subject: RFA
subject: LA-ICP-MS
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Phase diagram of a mixed spin-1 and spin-3/2 Ising ferrimagnet
Creators: name: Žukovič, M.
name: Bobák, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Critical and compensation properties of a mixed spin-1 and spin-3/2 Ising ferrimagnet on a square lattice are investigated by standard and histogram Monte Carlo simulations. The critical temperature is studied as a function of a single-ion anisotropy strength. The second order of the phase transition is established by finite-size scaling for the entire boundary. Some previously obtained results, such as a tricritical point, predicted by the mean field theory (MFT) and effective field theory (EFT), or a first-order transition line separating two different ordered phases, obtained by the cluster variational theory (CVT), are deemed artifacts of the respective approximations. So is a reentrant phenomenon produced by CVT. Nevertheless, the multicompensation behavior predicted by MFT and EFT was confirmed.
description: 14 pages, 5 figures
On the Possibility of Medium-Energy Compact X-ray Free-Electron Laser
Creators: name: Gevorgian, Lekdar
name: Vardanyan, Valeri
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The problem of X-ray Free-Electron Laser operating on self-amplified spontaneous emission in irregular microundulator is considered. The case when the spectrum width of spontaneous radiation is conditioned by the spatial distribution of sources creating the undulating field is considered. In this case gain function of the stimulated radiation is dozens of times higher than that of the conventional undulators. We propose a model of irregular microundulator, which can be used to construct a drastically cheap and compact X-ray free-electron laser operating on medium energy electron bunch.
description: 6 pages, 5 figures, revtex4, accepted by Armenian Journal of Physics
New Constraints On The Dark Energy Equation of State
Creators: name: Said, Najla
name: Baccigalupi, Carlo
name: Martinelli, Matteo
name: Melchiorri, Alessandro
name: Silvestri, Alessandra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We combine recent measurements of Cosmic Microwave Background Anisotropies, Supernovae luminosity distances and Baryonic Acoustic Oscillations to derive constraints on the dark energy equation of state w in the redshift range 0
description: 7 Pages, 6 figures
The prices of renewable commodities: A robust stationarity analysis
Creators: name: Landajo, Manuel
name: Presno, María José
Publisher: name: arXiv
Year: 2024
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: This paper addresses the problem of testing for persistence in the effects of the shocks affecting the prices of renewable commodities, which have potential implications on stabilization policies and economic forecasting, among other areas. A robust methodology is employed that enables the determination of the potential presence and number of instant/gradual structural changes in the series, stationarity testing conditional on the number of changes detected, and the detection of change points. This procedure is applied to the annual real prices of eighteen renewable commodities over the period of 1900-2018. Results indicate that most of the series display non-linear features, including quadratic patterns and regime transitions that often coincide with well-known political and economic episodes. The conclusions of stationarity testing suggest that roughly half of the series are integrated. Stationarity fails to be rejected for grains, whereas most livestock and textile commodities do reject stationarity. Evidence is mixed in all soft commodities and tropical crops, where stationarity can be rejected in approximately half of the cases. The implication would be that for these commodities, stabilization schemes would not be recommended.
Entwicklung eines in situ Sensors zur Messung der metabolischen Aktivität in Bioprozessen
Creators: name: Busse, Christoph
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Bioprocess monitoring
subject: in situ specific oxygen uptake rate
subject: sensor systems
subject: Bioprozessüberwachung
subject: in situ spezifische Sauerstoffaufnahmerate
subject: Sensor Systeme
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Sempervivum christii
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E. Christii X minima - 3a: Schwarze Balmen auf Alpien (Binz 1947); Seehorn (Kunz 1945, Schmid 1946).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Lumineszenz eines Europium-Komplexes als Sonde zur quantitativen Bestimmung der photokatalytischen Aktivität selbstreinigender Oberflächen
Creators: name: Blanco De La Cruz, Ana Teresa
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Photocatalytic
subject: dye
subject: photocatalytic degradation
subject: Photokatalyse
subject: Farbstoff
subject: photokatalytischer Abbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Revisiting interferences for measuring and optimizing optical nonlinearities
Creators: name: Billard, F.
name: Béjot, P.
name: Hertz, E.
name: Lavorel, B.
name: Faucher, O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A method based on optical interferences for measuring optical nonlinearities is presented. In a proof-of-principle experiment, the technique is applied to the experimental determination of the intensity dependence of the photoionization process. It is shown that it can also be used to control and optimize the nonlinear process itself at constant input energy. The presented strategy leads to enhancements that can reach several orders of magnitude for highly nonlinear processes.
description: 6 pages, 5 figures
Theoretische und experimentelle Untersuchung der parasitären Modenkopplung an Ultraschallwerkzeugen
Creators: name: Brouet, François
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Ultrasonic
subject: horn
subject: mode coupling
subject: modal interaction
subject: modal degeneration
subject: mistuning
subject: frequency veering
subject: Ultraschall
subject: Sonotrode
subject: Modenkopplung
subject: modale Interaktion
subject: modale Degeneration
subject: Verstimmung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Stability of 248-254^Cf isotopes against alpha and cluster radioactivity
Creators: name: Santhosh, K. P.
name: Biju, R. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Stability of 248-254^Cf nuclei against alpha and cluster emission is studied within our Coulomb and proximity potential model (CPPM). It is found that these nuclei are stable against light clusters (except alpha particle) and instable against heavy cluster emissions. For heavy cluster emissions the daughter nuclei lead to doubly magic 208^Pb or neighbouring one. The effect of quadrapole and hexadecapole deformations of parent nuclei, daughter nuclei and emitted cluster on half lives are also studied. The computed alpha decay half life values (with including quadrupole deformation β2) are in close agreement with experimental data. Inclusion of quadrupole deformation reduces the height and width of the barrier (increases the barrier penetrability) and hence half life decreases.
description: 15 pages, 1 figure
On the steady state correlation functions of open interacting systems
Creators: name: Cornean, Horia D.
name: Pillet, Claude-Alain
name: Moldoveanu, Valeriu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the existence of steady state Green-Keldysh correlation functions of interacting fermions in mesoscopic systems for both the partitioning and partition-free scenarios. Under some spectral assumptions on the non-interacting model and for sufficiently small interaction strength, we show that the system evolves to a NESS which does not depend on the profile of the time-dependent coupling strength/bias. For the partitioned setting we also show that the steady state is independent of the initial state of the inner sample. Closed formulae for the NESS two-point correlation functions (Green-Keldysh functions), in the form of a convergent expansion, are derived. In the partitioning approach, we show that the 0th order term in the interaction strength of the charge current leads to the Landauer-Buettiker formula, while the 1st order correction contains the mean-field (Hartree-Fock) results.
Asymmetrische Rh(I)-katalysierte 1,4-Addition von Arylboronsäuren an acceptorsubstituierte carbo- und heterocyclische Cycloalkene : formale Synthese von (+)-Vabicaserin
Creators: name: Dziechciejewski, Wojciech Jan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Asymmetric synthesis
subject: homogeneous transition metal catalysis
subject: optimization of reaction conditions
subject: drug synthesis
subject: Asymmetrische Synthese
subject: 1,4-Addition
subject: homogene Übergangsmetallkatalyse
subject: Reaktionsoptimierung
subject: Wirkstoffsynthese
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Two-photon interference between disparate sources for quantum networking
Creators: name: McMillan, A. R.
name: Labonté, L.
name: Clark, A. S.
name: Bell, B.
name: Alibart, O.
name: Martin, A.
name: Wadsworth, W. J.
name: Tanzilli, S.
name: Rarity, J. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum networks involve entanglement sharing between multiple users. Ideally, any two users would be able to connect regardless of the type of photon source they employ, provided they fulfill the requirements for two-photon interference. From a theoretical perspective, photons coming from different origins can interfere with a perfect visibility, provided they are made indistinguishable in all degrees of freedom. Previous experimental demonstrations of such a scenario have been limited to photon wavelengths below 900 nm, unsuitable for long distance communication, and suffered from low interference visibility. We report two-photon interference using two disparate heralded single photon sources, which involve different nonlinear effects, operating in the telecom wavelength range. The measured visibility of the two-photon interference is 80+/-4%, which paves the way to hybrid universal quantum networks.
Shot noise of spin current and spin transfer torque
Creators: name: Yu, Yunjin
name: Zhan, Hongxin
name: Wan, Langhui
name: Wang, Bin
name: Wei, Yadong
name: Sun, Qingfeng
name: Wang, Jian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the theoretical investigation of noise spectrum of spin current and spin transfer torque for non-colinear spin polarized transport in a spin-valve device which consists of normal scattering region connected by two ferromagnetic electrodes. Our theory was developed using non-equilibrium Green's function method and general non-linear $S^σ-V$ and $S^τ-V$ relations were derived as a function of angle $θ$ between magnetization of two leads. We have applied our theory to a quantum dot system with a resonant level coupled with two ferromagnetic electrodes. It was found that for the MNM system, the auto-correlation of spin current is enough to characterize the fluctuation of spin current. For a system with three ferromagnetic layers, however, both auto-correlation and cross-correlation of spin current are needed to characterize the noise spectrum of spin current. Furthermore, the spin transfer torque and the torque noise were studied for the MNM system. For a quantum dot with a resonant level, the derivative of spin torque with respect to bias voltage is proportional to $\sinθ$ when the system is far away from the resonance. When the system is near the resonance, the spin transfer torque becomes non-sinusoidal function of $θ$. The derivative of noise spectrum of spin transfer torque with respect to the bias voltage $N_τ$ behaves differently when the system is near or far away from the resonance. Specifically, the differential shot noise of spin transfer torque $N_τ$ is a concave function of $θ$ near the resonance while it becomes convex function of $θ$ far away from resonance. For certain bias voltages, the period $N_τ(θ)$ becomes $π$ instead of $2π$. For small $θ$, it was found that the differential shot noise of spin transfer torque is very sensitive to the bias voltage and the other system parameters.
description: 15pages, 6figures
Charakterisierung von biodegradierbaren Implantatmaterialien und deren Korrosionsprodukten in vitro und ex vivo
Creators: name: Zimmermann, Fabian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Biodegradable implants
subject: animal study
subject: corrosion experiment
subject: elemental analysis
subject: Biodegradierbare Implantate
subject: Tierstudie
subject: Korrosionsversuch
subject: Elementanalytik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik

description: [no abstract]
CF4J: Collaborative Filtering for Java
Creators: name: Ortega, Fernando
name: Zhu, Bo
name: Bobadilla, Jesus
name: Hernando, Antonio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Recommender Systems (RS) provide a relevant tool to mitigate the information overload problem. A large number of researchers have published hundreds of papers to improve different RS features. It is advisable to use RS frameworks that simplify RS researchers: a) to design and implement recommendations methods and, b) to speed up the execution time of the experiments. In this paper, we present CF4J, a Java library designed to carry out Collaborative Filtering based RS research experiments. CF4J has been designed from researchers to researchers. It allows: a) RS datasets reading, b) full and easy access to data and intermediate or final results, c) to extend their main functionalities, d) to concurrently execute the implemented methods, and e) to provide a thorough evaluation for the implementations by quality measures. In summary, CF4J serves as a library specifically designed for the research trial and error process.
Euphrasia hirtella
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E.hirtella X minima - l: Haut de Tanay (Paiche); Grammont (idem). - 2: Alp Saille ob Saillon (Gams). - 3: Soreboisim Val de Zinal, 2300m (Bernoulli). - 4: Gerental (B. C.W.).
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 Carnegie Hubble Program: The Infrared Leavitt Law in IC 1613
Creators: name: Scowcroft, Victoria
name: Freedman, Wendy L.
name: Madore, Barry F.
name: Monson, Andrew J.
name: Persson, S. E.
name: Seibert, Mark
name: Rigby, Jane R.
name: Melbourne, Jason
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have observed the dwarf galaxy IC 1613, at multiple epochs in the mid--infrared using Spitzer and contemporaneously in the near--infrared using the new FourStar near-IR camera on Magellan. We have constructed Cepheid period--luminosity relations in the J, H, K_s, [3.6] and [4.5] bands and have used the run of their apparent distance moduli as a function of wavelength to derive the line--of--sight reddening and distance to IC1613. Using a nine--band fit, we find E(B-V) = 0.05 +- 0.01 mag and an extinction--corrected distance modulus of mu_{0} = 24.29 +- 0.03_{statistical} +- 0.03_{systematic} mag. By comparing our multi--band and [3.6] distance moduli to results from the tip of the red giant branch and red clump distance indicators, we find that metallicity has no measurable effect on Cepheid distances at 3.6 microns in the metallicity range -1.0 < [Fe/H] < 0.2, hence derivations of the Hubble constant at this wavelength require no correction for metallicity.
description: 33 pages, 8 figures. Accepted for publication in ApJ
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 2, Nr. 1 (1918)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2015

description: Titel
Inhalt
Hacke und Pflug der jüngeren Steinzeit...1-4
Zur Abstammung der süddeutschen Regenbogenschüsselchen...4-8
Vercana und Meduna, die Quellnymphen des Bades Bertrich...8-10
Über die zwanzigste Legion und ihre Beinamen...10-14
De signis Varianis a Roma receptis in anaglypho quodam expressis...14-17
Zum Grabhügelfund aus dem Kleinen Asperg...17-18
Römische und alemannische Fundstätten an der Römerstraße zwischen Rumersheim und Ottmarsheim im Elsaß...18-23
Ein antiochenischer Silberfund...23-25
Frühchristliche Inschrift aus Goddelau im Ried...25-28
Aus Museen und Vereinen...38-31
Literatur...31-32
Diffractive production of charm quark/antiquark pairs at RHIC and LHC
Creators: name: Luszczak, Marta
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We have discussed single and central diffractive production of $c \bar c$ pairs in the Ingelman-Schlein model. In these calculations we have included diffractive parton distributions obtained by the H1 collaboration at HERA and absorption effects neglected in some early calculations in the literature. The absorption effects which are responsible for the naive Regge factorization breaking cause that the cross section for diffractive processes is much smaller than that for the fully inclusive case, but could be measured at RHIC and LHC by imposing special condition on rapidity gaps. We discuss also different approaches to diffractive production of heavy quark/antiquark. The particular mechanism is similar to the diffractive dissociation of virtual photons into quarks, which drives diffractive deep inelastic production of charm in the low-mass diffraction, or large $β$-region.
description: 4 pages, 5 figures, talk given by M. Luszczak at International Workshop on Diffraction in High-Energy Physics, DIFFRACTION 2012, Puerto del Carmen, Lanzarote. (Canary Islands), Spain. September 10 - 15, 2012
An asteroseismic study of the Southern $β$ Cephei star \astrobj{ALS 3721}
Creators: name: Ulusoy, C.
name: Niemczura, E.
name: Ulaş, B.
name: Gülmez, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of a new investigation aimed to identify the pulsational characteristics of the Southern $β$ Cephei star ALS 3721. Spectroscopic and multicolour photometric data were acquired at the South African Astronomical Observatory (SAAO), South Africa in 2011. Frequency analysis showed that the oscillations of ALS 3721 could be attributed to the two main frequencies with higher significance. Stellar parameters and projected rotational velocity obtained by the spectra were also used to perform photometric mode identification. In order to determine spherical harmonic degrees ($l$), a principal method was followed by comparing the observed light amplitude ratios in different passbands with those computed from non--adiabatic pulsation models. In general case, therefore, the spherical harmonic degrees corresponding of the frequencies were found in the expected $β$ Cephei range.
description: 18 pages, 4 figures, 2 Tables. Accepted for publication in New Astronomy
Injektionssolarzellen auf Basis von metallorganischen Gerüstverbindungen
Creators: name: Panke, Jana Sophie
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Metal-organic frameworks
subject: injection solar cell
subject: dye-sensitized solar cell
subject: Metallorganische Gerüstverbindungen
subject: MOFs
subject: Injektionssolarzelle
subject: farbstoffsensibilisierte Solarzelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
The ACS LCID Project. VIII. The short-period Cepheids of Leo A
Creators: name: Bernard, Edouard J.
name: Monelli, Matteo
name: Gallart, Carme
name: Fiorentino, Giuliana
name: Cassisi, Santi
name: Aparicio, Antonio
name: Cole, Andrew A.
name: Drozdovsky, Igor
name: Hidalgo, Sebastian L.
name: Skillman, Evan D.
name: Stetson, Peter B.
name: Tolstoy, Eline
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of a new search for variable stars in the Local Group dwarf galaxy Leo A, based on deep photometry from the Advanced Camera for Surveys onboard the Hubble Space Telescope. We detected 166 bona fide variables in our field, of which about 60 percent are new discoveries, and 33 candidate variables. Of the confirmed variables, we found 156 Cepheids, but only 10 RR Lyrae stars despite nearly 100 percent completeness at the magnitude of the horizontal branch. The RR Lyrae stars include 7 fundamental and 3 first-overtone pulsators, with mean periods of 0.636 and 0.366 day, respectively. From their position on the period-luminosity (PL) diagram and light-curve morphology, we classify 91, 58, and 4 Cepheids as fundamental, first-overtone, and second-overtone mode Classical Cepheids (CC), respectively, and two as population II Cepheids. However, due to the low metallicity of Leo A, about 90 percent of the detected Cepheids have periods shorter than 1.5 days. Comparison with theoretical models indicate that some of the fainter stars classified as CC could be Anomalous Cepheids. We estimate the distance to Leo A using the tip of the RGB (TRGB) and various methods based on the photometric and pulsational properties of the Cepheids and RR Lyrae stars. The distances obtained with the TRGB and RR Lyrae stars agree well with each other while that from the Cepheid PL relations is somewhat larger, which may indicate a mild metallicity effect on the luminosity of the short-period Cepheids. Due to its very low metallicity, Leo A thus serves as a valuable calibrator of the metallicity dependencies of the variable star luminosities.
description: 16 pages, 13 figures. MNRAS, in press
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 3, Nr. 3/4 (1919)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2015

description: Speyerer Denkmäler in den Zeichnungen des Codex Pighianus in Berlin...65-71
Von der Grenze des Mittelalters. II...71-74
Zum Lyoner Bleimedaillon der Pariser Nationalbibliothek...74-78
Die poleis (oppida) Germaniens bei Ptolemaios...78-80
Ptolemäus und die Teutoburg...81
Zur Herkunft der Bügelplattenfibel...81-82
Zu Tacitus' Germania cap. 29...82-83
Nochmals die Markomannenhütten der Marcussäule...83-84
Frigg und Freyja...84
Neolithische „Pfahlbautenkeramik" in der südlichen Wetterau...84-86
Der Übergang der jüngsten Bronze- zur Eisenzeit in der Südwetterau...86-87
Vier Feuerböcke aus dem Hanauer Museum...88
Römische Brandgräber bei Bollstadt, Bez.-Amt Nördlingen...88-90
Zwei römische Friesreliefs aus Weinsheim bei Worms...90-92
Aus Museen und Vereinen...92-94
Literatur...94-96
Beilage
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 4, Nr. 1/2 (1920)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2015

description: Titel
Inhalt
Revolution auch in der deutschen Römerforschung?...1-7
Das Standlager der ala Vocontiorum bei Soissons...7-12
Römerstraßen und Straßenstationen im vorderen Hunsrück...12-16
Menhire auf und neben prähistorischen Gräbern...16-19
Drei Orte bei Ptolemäus...19-22
Wo war die Schlacht bei Rigodulum?...22
Das Hügelgräberfeld am Schabenberg bei Mainzlar a. d. Lumda...23-25
Die Grabung im Mainzer Legionslager 1919...25-30
Eine spätrömische Glashütte in den Argonnen...30-34
Die Basilika von Pesch...34-37
Bildwerk aus dem Odenwald...37-39
Aus Museen und Vereinen...40-43
Literatur...43-48
Beilage
Euphrasia hirtella X Rostkoviana
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: E. hirtella X Rostkoviana Cat. 280 und 430 (sub E. hirtella var. mixta). l: Haut de Tanay, 1500 m (Paiche). - 2: Ob Ayent (P.).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Neuronale Plastizität in Tiermodellen für neuropsychiatrische Erkrankungen
Creators: name: Reimers, Linda
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Dendritic spines
subject: automated 3D-spine analysis
subject: schizophrenia
subject: Synaptische Dornfortsätze (Spines)
subject: automatisierte 3D-Spine-Analyse
subject: Schizophrenie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 5, Nr. 3 (1921)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2015

description: Beilage
Die Neolithik im Südwesten Rheinhessens...87-102
Ein Hügelgrab der Frühlatenezeit bei Dienstweiler...102-104
Eine Darstellung des (Mars) Smertrius?...104-105
Das römische Felsdenkmal bei Schweinschied im Kreise Meisenheim (Nahebezirk)...106-113
Ein Schatzfund römischer Münzen bei Immendingen...113-116
Zum Münzfund von Immendingen...117-120
Buruncum = Worringen und die Namen-Ordnung im Antoninischen Itinerar...120-122
Ein römischer Krieg gegen die Friesen?...123
Frühgermanisches Grab aus dem Badischen Bauland...123-128
Bemerkungen zu Dopsch, Wirtschaftliche und soziale Grundlagen der europäischen Kulturentwicklung Bd. I....128-130
Ein Tuffsteinbruch des ober- und niedergermanischen Heeres bei Kruft...130-133
Blaue Rippenflasche im Provinzialmuseum zu Bonn: gefunden bei Straelen, Kreis Geldern....133-139
Aus Museen und Vereinen...139-140
Literatur...140-144
Baade-Wesselink distances to Galactic and Magellanic Cloud Cepheids and the effect of metallicity
Creators: name: Groenewegen, M. A. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (abridged) The aim of this paper is to investigate the metallicity dependence of the PL relation in V and K, based on a sample of 128 Galactic, 36 LMC, and 6 SMC Cepheids with individual Baade-Wesselink (BW) distances and individually determined metallicities from high-resolution spectroscopy. The p-relation finally adopted is 1.50 -0.24log P. The slope of this relation is based on the condition that the distance to the LMC does not depend on period or (V-K) colour and that the slope of the PL relation based on the BW distances agrees with that based on apparent magnitude. The zero point of the relation is tight to the Cepheids with HST and revised Hipparcos parallaxes as well as to Cepheids in clusters. The slope of the Galactic and LMC K-band relation formally agrees within the errors, and combining all Cepheids (including the SMC) results in a negligible metallicity dependence. A similar conclusion is found for the reddening-free Wesenheit relation. In the V-band the situation is more complex. The slope of the LMC and the Galactic PL relation differ at the 3sigma level. Combining the sample nevertheless results in a metallicity term significant at the 2sigma level. The details of the comparison of BW-based distances and Cepheids with HST and revised Hipparcos parallaxes also play a role. The method used by Storm et al. would lead to larger DM of 18.37 and 18.81 for the LMC and SMC, respectively. The LMC DM is shorter than the currently accepted value, which is in the range 18.42 to 18.55 (Walker 2012), and it is speculated that the p-factor may depend on metallicity.
description: Accepted for A&A
Studien zur Totalsynthese des Chondrochlorens
Creators: name: Geldsetzer, Jan
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: natural products
subject: total synthesis
subject: Buchwald-Hartwig coupling
subject: Murata method
subject: Horner-Wadsworth-Emmons reaction
subject: Naturstoffe
subject: Totalsynthese
subject: Chondrochloren
subject: Buchwald-Hartwig-Kupplung
subject: Murata-Methode
subject: Horner-Wadsworth-Emmons-Reaktion
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Comments to a series of works by V.K. Mukhomorov on the theory of a continuum polaron and two-center bipolaron (axially symmetrical quasimolecular dimer)
Creators: name: Kashirina, N. I.
name: Lakhno, V. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Some critical remarks are made regarding a series of works by V.K. Mukhomorov dealing with polarons and oscillatory and rotational spectrum of a large-radius bipolaron near a subsidiary minimum corresponding to its two-center configuration. It is shown that V.K. Mukhomorov's conclusion that by varying the bipolaron functional one should look for a constrained rather than absolute minimum is erroneous. Consideration of interelectronic correlations corresponding to a direct dependence of the wave function of the studied system on the distance between the electrons does not break the virial theorem. In the strong coupling limit the virial theorem holds true for both one-center and two-center bipolaron states, the latter representing a subsidiary minimum which arises due to a choice of an insufficiently versatile variation function.
description: 18 pages, 2 figures. Published in peer-reviewed open access journal. http://www.matbio.org/article.php?id=35&lang=eng
Studien zur Totalsynthese der Cebulactame A1 und A2
Creators: name: Geist, Egor
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Total synthesis
subject: marine natural products
subject: Stille-crosscoupling
subject: synthesis under high-pressure conditions
subject: transition metal-catalysed cyclisation
subject: chromane synthesis
subject: Totalsynthese
subject: marine Naturstoffe
subject: Stille-Kreuzkupplung
subject: Diels-Alder-Cycloaddtion
subject: Hochdruck-Synthese
subject: Übergangsmetall-katalysierte Zyklisierung
subject: Chroman-Synthese
subject: Baeyer-Villiger-Oxidation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Quantized coexisting electrons and holes in graphene measured using temperature dependent magneto-transport
Creators: name: Kurganova, E. V.
name: Wiedmann, S.
name: Giesbers, A. J. M.
name: Gorbachev, R. V.
name: Novoselov, K. S.
name: Katsnelson, M. I.
name: Tudorovskiy, T.
name: Maan, J. C.
name: Zeitler, U.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present temperature-dependent magneto-transport experiments around the charge neutrality point in graphene and determine the amplitude of potential fluctuations $s$ responsible for the formation of electron-hole puddles. The experimental value $s \approx 20$ meV is considerably larger than in conventional semiconductors which implies a strong localization of charge carriers observable up to room temperature. Surprisingly, in the quantized regime, the Hall resistivity overshoots the highest plateau values at high temperatures. We demonstrate by model calculations that such a peculiar behavior is expected in any system with coexisting electrons and holes when the energy spectrum is quantized and the carriers are partially localized.
description: 5 pages, 5 figures, corrected typo in author's name
Studien zur Totalsynthese von Codinaeopsin
Creators: name: Richter, Michael
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Intramolecular Diels-Alder reaction
subject: diastereoselective hydrogenation
subject: total synthesis
subject: natural products
subject: Codinaeopsin
subject: intramolekulare Diels-Alder-Reaktion
subject: diastereoselektive Hydrierung
subject: Totalsynthese
subject: Naturstoffe
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
title: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 6, Nr. 2 (1922)
title: Germania
titleType: AlternativeTitle
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2015

description: Das römisch-germanische Altertum und der Schulunterricht...49-53
Körperbestattung und Leichenverbrennung in Mittel- und Westdeutschland...53-62
Die Häuser der Bataven...62-68
Die römische Mainbrücke bei Frankfurt a. M....68-77
Unveröffentlichte Inschriften aus dem Brohltale: Altar der Rheinflotte; Altar der Garde des Statthalters L. Licinius Sura...78-81
Ein Mithräum in Bingen...81-83
Ein römischer Altar aus Mainz...83-84
Neugefundene frühchristliche Grabschriften in Trier-St. Matthias...84-85
Turmen-Inschriften aus Cannstatt und Vechten...85-87
Bemerkungen zu den „Turmen-Inschriften"...87-88
Hatten die Römer Steigbügel?...88-93
Germanische Trichtergruben bei Heuchelheim (Kreis Gießen)...93-94
Literatur...94-96
Development of a total synthesis of cebulactams A1 and A2
Creators: name: Berneaud-Kötz, Helge
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: total synthesis
subject: marine natural products
subject: Diels-Alder reaction
subject: Totalsynthese
subject: marine Naturstoffe
subject: Diels-Alder Reaktion
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Die Cebulactame A1 und A2 wurden im Jahr 2008 aus einem Extrakt der marinen Spezies Saccharopolyspora cebuensis isoliert. Sie bestehen aus einem 13-gliedrigen Makrolactam, einem Chroman Kern, fünf Stereozentren und einer Doppelbindung, die in Cebulactam A1 (E)-konfiguriert und in Cebulactam A2 (Z)-konfiguriert ist. In der folgenden Arbeit werden zwei unterschiedliche Ansätze zu deren Totalsynthese beschrieben. Der erste Weg konzentrierte sich auf eine Hochdruck-Diels-Alder-Reaktion in einer de novo-Konstruktion des aromatischen Kerns des Chromans, ausgehend von einem Dihydropyran, das mittels Aldolchemie und einer Wolfram-katalysierten Cycloisomerisierung synthetisiert wurde. Der zweite Ansatz befasste sich mit ortho-Chinonmethid Chemie. Einerseits wird die Synthese des aromatischen Kerns und der Polyketidkette beschrieben, sowie deren Umsetzung in der ersten bekannten asymmetrischen katalytischen Oxa-6p-Elektrozyklisierungsreaktion. Zum anderen wird ein inverser Elektronenbedarfs-Hetero-Diels-AlderAnsatz beschrieben, der als Schlüsselschritt zur Ermöglichung der Makrozyklisierung getestet wurde. In diesem Zusammenhang wurde der Vorläufer mit allen Kohlenstoffatomen von Cebulactam via einer intermolekularen Reformatsky-Reaktion synthetisiert.
description: The cebulactams A1 and A2 were isolated from an extract of the marine species Saccharopolyspora cebuensis in 2008. They consist of a 13-membered macrolactam, a chromane moiety, five stereocenters and a double bond, which is (E)-configured in cebulactam A1 and (Z)-configured in cebulactam A2. In the following thesis, two distinctive approaches towards their total synthesis are described. The first route focused on a high-pressure Diels-Alder reaction in a de novo construction of the aromatic core of the chromane, starting from a dihydropyran which was synthesized using aldol chemistry and a tungsten-catalyzed cycloisomerization. The second approach evolved around ortho-quinone methide chemistry. On one hand the synthesis of the aromatic core and the polyketide chain are described, as well as their transformation in the first known asymmetrical catalytic oxa-6p-electrocyclization reaction. On the other hand, an inverse electron-demand hetero-Diels-Alder approach is described, which was tested as a keystep to enable macrocyclization. In that regard, the precursor with all carbon atoms of cebulactam was synthesized via an intermolecular Reformatsky