cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A novel measuring chamber and automation platform for mammalian cell culture processes
Creators: name: Lücking, Tim H.
name: Busse, Christoph
name: Lüder, Christian
name: Bulnes-Abundis, David
name: Solle, Dörte
name: Scheper, Thomas
Publisher: name: London : BioMed Central Ltd.
Year: 2015
Subjects: subject: Analytical Sensor
subject: Measuring Chamber
subject: Seal Ring
subject: Process Analytical Technology
subject: Stainless Steel Reactor
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: One of the biggest challenges of biotechnological production is the implementation of Process Analytical Technology (PAT) to obtain a highly automated, monitored and controlled process. Therefore the integration of suitable analytical sensors has to be faced at the earliest opportunity during process development. But sensor implementation for glass or disposable reactors encounters different issues. These systems are not designed to support well-established and standardized analytic ports for more complex probes used for stainless steel reactors. The here presented measuring chamber, combined with an automation platform enable an accelerated integration of PAT during all stages of process development for any reactor type.
Acarelliptus paraoccidentalis Shevtchenko & Pogosova 1983
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Eriophyidae
Acarelliptus
Acarelliptus paraoccidentalis

description: Acarelliptus paraoccidentalis Shevtchenko & Pogosova, 1983
 Acarelliptus paraoccidentalis Shevtchenko & Pogosova, 1983: 346–349.
 Host. Quercus robur, Q. macranthera (Fagaceae).
 Relation to host. Vagrant.
 Distribution. Armenia.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 47, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
A Laser System for Gray-Molasses Cooling on the D1 Transition of an Atomic Gas of 39K
Creators: name: Shammout, Baraa
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität
Year: 2020
Subjects: subject: Quantum optics
subject: Laser cooling
subject: Ultracold atoms
subject: Atomic physics
subject: Physics
subject: Gray molasses
subject: Potassium
subject: Bose-Einstein condensation
subject: Ultracold quantum gases
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: In this work we present the design and the construction of a laser system for cooling an atomic gas of potassium 39K on the D1-Line by gray molasses technique. The seed laser is an Interference-filter-stabilized external-cavity diode laser (ECDL). The laser frequency is stabilized to one of the atomic features of 39K D1-transition thanks to frequency modulation (FM) spectroscopy. The low seed power is then amplified by means of tapered amplifier (TA). Finally, the cooling and repumping beams are generated and blue-detuned from the atomic transitions |F = 2> → |F'= 2> and |F = 1> → |F'= 2> using two acousto-optic modulators (AOMs).
Calepitrimerus fagisylvaticus Keifer 1965
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Eriophyidae
Calepitrimerus
Calepitrimerus fagisylvaticus

description: Calepitrimerus fagisylvaticus Keifer, 1965
 Calepitrimerus fagisylvaticus Keifer, 1965: 17.
 Calepitrimerus fagisylvaticus; Amrine & Stasny, 1994: 152.
 Calepitrimerus fagisylvaticus; Petanović & Stanković, 1999: 29.
 Calepitrimerus fagisylvaticus; Soika & Łabanowski, 2002b: 71.
 Host. Fagus sylvatica, F. moesiaca (Fagaceae).
 Relation to host. Vagrant.
 Distribution. UK (England), Montenegro.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 47, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Pre-geometric structure of quantum and classical particles in terms of quaternion spinors
Creators: name: Yefremov, Alexander P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: K.m
subject: 16B50

description: It is shown that dyad vectors on a local domain of complex-number valued surface, when squared, form a set of four quaternion algebra units. A model of proto-particle is built by the dyad's rotation and stretching; this transformation violates metric properties of the surface, but the defect is cured by a stability condition for normalization functional over an abstract space. If the space is the physical one then the stability condition is precisely Schrodinger equation; separated real and imaginary parts of the condition are respectively equation of mass conservation and Hamilton-Jacoby equation. A 3D particle (composed of the proto-particle's parts) has to be conceived as a rotating massive point, its Lagrangian automatically becoming that of relativistic classical particle, energy and momentum proportional to Planck constant. In uence of a vector field onto the particle's propagation causes automatic appearance of Pauli spin term in Schrodinger equation.
description: 10 pages
Oenothera biennis L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. biennis L. Cat. 219. Nichts zuzufügen.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Absolute gravity measurements in Hamburg (Groß Flottbek) at DESY (Deutsches El-ektronen-Synchrotron) with the Hannover gravity meter FG5X-220 in July 2018
Creators: name: Timmen, Ludger
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2018
Subjects: subject: Sinkhole
subject: gravimetry
subject: geo-monitoring
subject: temporal gravity changes
subject: Erdfall
subject: Gravimetrie
subject: Geomonitoring
subject: zeitliche Schwereänderungen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::551 | Geologie, Hydrologie, Meteorologie

description: Integrative geodetic-gravimetric approach for investigating the longterm stability in the sinkhole area of Hamburg-Flottbek.
Adaptive hyperbooks : adaptation for project-based learning resources
Creators: name: Henze, Nicola
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Adaptive hypermedia systems
subject: user modeling
subject: constructivism
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: [no abstract]
Overview of large N QCD with chemical potential at weak and strong coupling
Creators: name: Hollowood, Timothy J.
name: Myers, Joyce C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this note we summarize the results from a longer article on obtaining the QCD phase diagram as a function of the temperature and chemical potential at large Nc and large Nf in the weak and the strong coupling limits. The weak coupling phase diagram is obtained from the Polyakov line order parameter, and the quark number, calculated using 1-loop perturbation theory for QCD formulated on S^1 x S^3. The strong coupling phase diagram is obtained from the same observables calculated at leading order in the lattice strong coupling and hopping parameter expansions. We show that the matrix models in these two limits agree at temperatures and chemical potentials which are not too high, such that observables in the strongly-coupled theory can be obtained from the observables in the weakly-coupled theory, and vice versa, using a simple transformation of variables.
description: 5 pages, 3 figures, Proceedings for XQCD 2012, August 21-23, 2012, at George Washington University, Washington, DC, USA, +2 additional references
Adsorption and transformation of acetaldehyde on the TiO2 surface
Creators: name: Melchers, Stephanie
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: titanium dioxide
subject: acetaldehyde
subject: degradation mechanism
subject: lattice oxygen
subject: Titandioxid
subject: Acetaldehyd
subject: Adsorption
subject: Abbaumechanismus
subject: Gittersauerstoff
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: During the last decade intensive research work has been carried out in the field of photocatalysis because upon UV illumination photocatalysts such as titanium dioxide (TiO2) are able to catalyze the degradation of organic compounds in waste water as well as in air. However, the reaction mechanisms and the limitations of the photocatalytic processes have been studied in the literature less frequently, although the understanding of the fundamental processes is essential in order to design a photocatalyst with an improved photocatalytic activity. In this work the effect of O2 and H2O on the adsorption and the photocatalytic degradation of gaseous acetaldehyde over TiO2 has been investigated in the dark and upon UV illumination. The surface processes have been elucidated by means of in situ ATR-FTIR spectroscopy, while the gas phase was analysed by GC/PID and MS. The results obtained from the surface and from the gas phase were correlated with each other in order to gain a deeper insight into the adsorption and the degradation mechanism of acetaldehyde. In this study it is shown, that in the dark the TiO2 surface is able to catalyze an aldol condensation of two adsorbed acetaldehyde molecules forming crotonaldehyde. These surface processes are strongly affected by the humidity, because an increasing water vapor content induces a decrease in the adsorption of acetaldehyde molecules resulting in a reduction of the crotonaldehyde formation. In contrast, molecular O2 does not exhibit an influence on the surface processes in the dark. However, upon UV illumination the degradation of acetaldehyde is strongly affected by the O2 concentration, because acetaldehyde is incompletely degraded when O2 is not present. Besides the important role of O2, isotopic studies using Ti18O2 show that lattice oxygen atoms from the TiO2 surface are involved in the photocatalytic degradation process of acetaldehyde in the absence of O2.
Delay and Delay Variation Constrained Algorithm based on VNS Algorithm for RP Management in Mobile IPv6
Creators: name: Baddi, Youssef
name: Kettani, Mohamed Dafir Ech-Cherif El
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: On account of the progress of network multimedia technology, more and more real-time multimedia applications arrive with the need to transmit information using multicast communication. These applications are more important with the arrival of mobile IPv6 protocol through mobile receivers and sources. These applications require a multicast routing protocol which has packets arriving at multicast receptors within a specified QoS guaranteed and a quick recovery mechanism. When multicasting with mobile IPv6, the mobility of a receivers and senders may lead to serious problems. When the receiver or sender moves, the quality of full multicast tree may degrade so that multicast datagrams cannot be forwarded efficiently. D2V-RPM (delay and delay variation RP Manager) problem consist in choosing an optimal multicast router in the network as the root of the shared multicast tree (ST) within a specified delay and delay variation bound for all multicast session, and recovering this RP if it's not optimal or it has failed. This NP hard problem needs to be solved through a heuristic algorithm. In this paper, we propose a new RP Management algorithm based on Variable Neighborhood Search algorithm, based on a systematic neighborhood changing. D2VVNS-RPM algorithm selects and recovers the RP router by considering tree cost, delay and delay variation. Simulation results show that good performance is achieved.
Calepitrimerus longitubereris Liu & Kuang 1998
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Eriophyidae
Calepitrimerus
Calepitrimerus longitubereris

description: Calepitrimerus longitubereris Liu & Kuang, 1998
 Calepitrimerus longitubereris Liu & Kuang, 1998a: 152–153.
 Relation to host. Vagrant.
 Distribution. China (Yunnan).
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on pages 47-48, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Calepitrimerus parnisiensis Malandraki & Emmanouel 2001
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Eriophyidae
Calepitrimerus
Calepitrimerus parnisiensis

description: Calepitrimerus parnisiensis Malandraki & Emmanouel, 2001
 Calepitrimerus parnisiensis Malandraki & Emmanouel, 2001: 211–213.
 Host. Quercus ilex (Fagaceae).
 Relation to host. Erineum.
 Distribution. Greece.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 48, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Parametrizing the exoplanet eccentricity distribution with the Beta distribution
Creators: name: Kipping, David M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: It is suggested that the distribution of orbital eccentricities for extrasolar planets is well-described by the Beta distribution. Several properties of the Beta distribution make it a powerful tool for this purpose. For example, the Beta distribution can reproduce a diverse range of probability density functions (PDFs) using just two shape parameters (a and b). We argue that this makes it ideal for serving as a parametric model in Bayesian comparative population analysis. The Beta distribution is also uniquely defined over the interval zero to unity, meaning that it can serve as a proper prior for eccentricity when analysing the observations of bound extrasolar planets. Using nested sampling, we find that the distribution of eccentricities for 396 exoplanets detected through radial velocity with high signal-to-noise is well-described by a Beta distribution with parameters a = 0.867+/-0.044 and b = 3.03+/-0.17. The Beta distribution is shown to be 3.7 times more likely to represent the underlying distribution of exoplanet eccentricities than the next best model: a Rayleigh + exponential distribution. The same data are also used in an example population comparison utilizing the Beta distribution, where we find that the short- and long-period planets are described by distinct Beta distributions at a confidence of 11.6 sigma and display a signature consistent with the effects of tidal circularization.
description: 5 pages, 4 figures, 2 tables, accepted in MNRAS Letters. Code available at https://www.cfa.harvard.edu/~dkipping/betaprior.html
From Pre-Quantum to Post-Quantum IoT Security: A Survey on Quantum-Resistant Cryptosystems for the Internet of Things
Creators: name: Fernandez-Carames, Tiago M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: This article provides a survey on what can be called post-quantum IoT systems (IoT systems protected from the currently known quantum computing attacks): the main post-quantum cryptosystems and initiatives are reviewed, the most relevant IoT architectures and challenges are analyzed, and the expected future trends are indicated. Thus, this paper is aimed at providing a wide view of post-quantum IoT security and give useful guidelines to the future post-quantum IoT developers.
Transport of spin-anisotropy without spin currents
Creators: name: Hell, Michael
name: Das, Sourin
name: Wegewijs, Maarten Rolf
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We revisit the transport of spin-degrees of freedom across an electrically and thermally biased tunnel junction between two ferromagnets with non-collinear magnetizations. Besides the well-known charge and spin currents we show that a non-zero spin-quadrupole current flows between the ferromagnets. This tensor-valued current describes the non-equilibrium transport of spin-anisotropy relating to both local and non-local multi-particle spin correlations of the circuit. This quadratic spin-anisotropy, quantified in terms of the spin-quadrupole moment, is fundamentally a two-electron quantity. In spin-valves with an embedded quantum dot such currents have been shown to result in a quadrupole accumulation that affects the measurable quantum dot spin and charge dynamics. The spin-valve model studied here allows fundamental questions about spin-quadrupole storage and transport to be worked out in detail, while ignoring the detection by a quantum dot. This physical understanding of this particular device is of importance for more complex devices where spin-quadrupole transport can be detected. We demonstrate that, as far as storage and transport are concerned, the spin anisotropy is only partly determined by the spin polarization. In fact, for a thermally biased spin-valve the charge- and spin-current may vanish, while a pure exchange spin-quadrupole current remains, which appears as a fundamental consequence of Pauli's principle. We extend the real-time diagrammatic approach to efficiently calculate the average of multi-particle spin-observables, in particular the spin-quadrupole current. Although the paper addresses only leading order and spin-conserving tunneling we formulate the technique for arbitrary order in an arbitrary, spin-dependent tunnel coupling in a way that lends itself to extension to quantum-dot spin-valve structures.
Aging processes of sealing materials
Creators: name: Aoyagi, Yuichi
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: Rubber
subject: EPDM (Ethylenpropylen-terpolymer) aging
subject: Kautschuk
subject: Kautschukelastizität
subject: EPDM (Ethylenpropylen-terpolymer) Alterung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: In practice, sealing materials are always used under deformation and are subject to various aging processes as a function of ambient parameters such as, for example, temperature and oxygen, frequently manifested in stress relaxation impacted critically with respect to the long-term functioning of the seal. This study thus aims to contribute to a detailed understanding of the specific aging mechanism of stress relaxation in the case of EPDM elastomers. To this end, the influence of material and ambient parameters on irreversible changes in the crosslinking and chemical structures of the polymer matrix under mechanical load was extensively examined. In point of detail, the effects of material parameters like crosslinking agent, crosslinking density, carbon black, antioxidants, oxygen, and the polymer microstructure of EPDM were closely studied. Attainment of the targeted objective of this study involved further development and optimization of innovative characterization methods like low-field time-domain NMR spectroscopy with inverse Laplace transformation (ILT) and chemiluminescence under strain. The NMR methods and the ILT analysis methods further developed here were used to describe as precisely as possible the structural changes occurring in the network and with respect to chain mobility. With the help of this method, it was possible to quantify structural changes like crosslinking, the share of free chain ends and free chain fragments formed during the aging process. All the aforementioned material parameters were found to have a significant impact on the agingrelated change in stress relaxation at constant deformation. The rate of thermal oxidation under deformation was also shown to be greater than in a non-deformed state. The new characterization methods allow for a much more precise description, and thus a markedly better understanding, of the stress relaxation mechanism among elastomers.
Caliphytoptus quercilobatae Keifer 1938
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Acari
Eriophyidae
Caliphytoptus
Caliphytoptus quercilobatae

description: Caliphytoptus quercilobatae Keifer, 1938
 Caliphytoptus quercilobatae Keifer, 1938: 311–312.
 Caliphytoptus quercilobatae; Amrine & Stasny, 1994: 154.
 Caliphytoptus quercilobatae; Baker, et al., 1996: 262.
 Host. Quercus lobata (Fagaceae).
 Relation to host. Vagrant.
 Distribution. USA.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 48, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Thermal Conductivity of Core-Shell Based Nanocomposites for Enhancing Thermoelectric ZT
Creators: name: Poon, S. J.
name: Petersen, A. S.
name: Wu, Di
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The differential effective medium method (DEM) is presented from a physical viewpoint and employed to calculate the lattice thermal conductivity of nano-bulk composites comprising core-shell particles. Extended from the average-T-matrix single-particle approximation, DEM incorporates interparticle effect essential for the study of core-shell nanocomposites (CSN). Interparticle boundary scattering in addition to intraparticle boundary scattering in CSN is found to add to the reduction of thermal conductivity of nanocomposites. Thus, CSN hold the promise of improving the thermoelectric dimensionless figure of merit ZT above that of monolithic nano-bulk phases. Si and SiGe based CSN serve as illustrative examples.
Advanced techniques for squeezed-light-enhanced gravitational-wave detection
Creators: name: Gniesmer, Jan
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: gravitational-wave detection
subject: Frequency-dependent squeezed light
subject: entanglement
subject: Bichromatic homodyne detection
subject: Gravitationswellendetektion
subject: Frequenzabhängiges gequetschtes Licht
subject: Verschränkung
subject: Zweifarbige Homodyndetektion
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Quantum noise is one of the limiting factors in laser-interferometric gravitational-wave (GW) detectors. The application of squeezed states in these interferometers allows the reduction of quantum noise in one quadrature. Due to opto-mechanical coupling in a GW detector the squeezed quadrature needs to be rotated within the spectrum to achieve a broadband noise reduction. So far, the implementation of additional filter cavities is considered that allow for the optimal, frequency-dependent rotation of the squeezed quadrature. However, these cavities need to have low loss, a length in the order of \unit[100]{m} and must be situated in the vacuum system, making them cost-intensive. In 2017, Ma and coworkers proposed a scheme for the broadband quantum-noise reduction without the need of additional filter cavities. It was shown by Brown et al. that a similar scheme can be used to broadband-enhance interferometers with a detuned signal-recycling cavity. Here, we performed a proof-of-principle experiment of the proposal on a table-top-scale. Squeezed states were produced detuned to the carrier field of a \unit[2.5]{m}-linear cavity and read out in a bichromatic homodyne detection. The frequencies of the lower and upper local oscillator were at entangled sidebands of the squeezed field. Depending on the relations between the involved frequencies, we can address both variants of the proposal. We show, that the frequency-dependences of the resulting noise spectra fit to a theoretical model we derived from the theory used by Ma et al. With this work we set the path towards an implementation of these schemes in a GW-detector prototype, where the compatibility of the approach with a low-frequency suspended interferometer can be tested. Moreover, we used the same setup to show nonclassical interferometer enhancement at low frequencies by high-frequency squeezed states. Here, a heterodyne readout scheme was implemented to avoid limiting noises at low frequencies. The application of squeezed states centered around the local oscillator frequency yielded an improvement in signal-to-noise ratio of $\unit[3.4]{dB}\pm\unit[0.3]{dB}$. Additionally, I designed, built and characterized a compact source of squeezed vacuum-states at \unit[1064]{nm} with a footprint of just $\unit[0.8]{m^2}$. I show measurements of squeezed states from this source with a reduction of quantum noise of $\unit[10.7]{dB}\pm\unit[0.2]{dB}$ below the vacuum noise and present a noise reduction in the frequency range from \unit[70]{kHz} to \unit[65]{MHz}.
Observation of double percolation transitions in Ag-SnO$_2$ nanogranular films
Creators: name: Wei, Yan-Fang
name: Li, Zhi-Qing
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Two percolation transitions are observed in Ag$_x$(SnO$_2)_{1-x}$ nanogranular films with Ag volume fraction $x$ ranging from $\sim$0.2 to $\sim$0.9. In the vicinity of each percolation threshold $x_{ci}$ ($i$$=$1, 2), the variation in $σ$ with $x$ obeys a power law for $x$$>$$x_{ci}$. The origin of the first percolation transition at $x_{c1}$ ($x_{c1}$$>$$x_{c2}$) is similar to that of the classical one, while the second transition is explained as originating from the tunneling to the second-nearest neighboring Ag particles. These observations provide strong experimental support for the validity of current theories concerning tunneling effect in conductor-insulator nanogranular composites.
description: 4 pages and 4 figures
Advanced numerical approaches in the dynamics of relativistic flows
Creators: name: Radice, David
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Relativistic hydrodynamics
subject: numerical methods
subject: general relativity
subject: Relativistische Hydrodynamik
subject: numerische Methoden
subject: allgemeine Relativitätstheorie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Kondo effect by controlled cleavage of a single molecule contact
Creators: name: Temirov, R.
name: Lassise, A. C.
name: Anders, F.
name: Tautz, F. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Conductance measurements of a molecular wire, contacted between an epitaxial molecule-metal bond and the tip of a scanning tunneling microscope, are reported. Controlled retraction of the tip gradually de-hybridizes the molecule from the metal substrate. This tunes the wire into the Kondo regime in which the renormalized molecular transport orbital serves as spin impurity at half filling and the Kondo resonance opens up an additional transport channel. Numerical renormalization group simulations suggest this type of behavior to be generic for a common class of metal molecule bonds. The results demonstrate a new approach to single-molecule experiments with atomic-scale contact control and prepare the way for the ab initio simulation of many-body transport through single-molecule junctions.
description: Main text: 41 pages including references and captions, 9 figures. Supplementary information: 5 pages including 2 figures New experimental and theoretical data supporting initial claims are added. The paper has been reworked from the letter format into a longer version
Aging in basal metazoans : a biodemographic approach
Creators: name: Ringelhan, Felix
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2015
Subjects: subject: Basal Metazoa
subject: aging
subject: biodemography
subject: Basale Metazoa
subject: Alterung
subject: Biodemografie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Footprints in the wind of Vela X-1 traced with MAXI
Creators: name: Doroshenko, V.
name: Santangelo, A.
name: Nakahira, S.
name: Mihara, T.
name: Sugizaki, M.
name: Matsuoka, M.
name: Nakajima, M.
name: Makishima, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The stellar wind around the compact object in luminous wind-accreting high mass X-ray binaries is expected to be strongly ionized with the X-rays coming from the compact object. The stellar wind of hot stars is mostly driven by light absorption in lines of heavier elements, and X-ray photo-ionization significantly reduces the radiative force within the so-called Stroemgren region leading to wind stagnation around the compact object. In close binaries like Vela X-1 this effect might alter the wind structure throughout the system. Using the spectral data from Monitor of All-sky X-ray Image (MAXI), we study the observed dependence of the photoelectric absorption as function of orbital phase in Vela X-1, and find that it is inconsistent with expectations for a spherically-symmetric smooth wind. Taking into account previous investigations we develop a simple model for wind structure with a stream-like photoionization wake region of slower and denser wind trailing the neutron star responsible for the observed absorption curve.
description: 5 pages, 3 figures, accepted in A&A
Carex paludosa
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C. paludosa (L.) Mönch Cat. 220. Bis 2150 m. l: Lovenex (J.); Haut de Tanay (J.); Epinassey (Mariétan); Salanfe (Coquoz); Finhaut (J.). - 2: Alpen von Lens (J.). - 3: Valsorey (Guyot); Val d'Heremence (J.); Ayer (J.); Jatzalp-Melchfluh ob Randa, 2150 m (Huber); Zermatt (Thellung); Gspon (Beauverd); unter Saas-Grund (Becherer); Saas-Fee (A. Keller, Hirschmann). -3a: Welschmatten (Alpien) (Becherer); Gondo (idem). - 4: Binntal: Twingen (J.), Willeren (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
From Josephson junction metamaterials to tunable pseudo-cavities
Creators: name: Zueco, D.
name: Fernández-Juez, C.
name: Yago, J.
name: Naether, U.
name: Peropadre, B.
name: García-Ripoll, J. J.
name: Mazo, J. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The scattering through a Josephson junction interrupting a superconducting line is revisited including power leakage. We discuss also how to make tunable and broadband resonant mirrors by concatenating junctions. As an application, we show how to construct cavities using these mirrors, thus connecting two research fields: JJ quantum metamaterials and coupled cavity arrays. We finish by discussing the first non-linear corrections to the scattering and their measurable effects.
description: 14 pages, 7 figures, to appear in Supercond. Sci. Technol
Ion acceleration in "dragging field" of a light-pressure-driven piston
Creators: name: Ji, Liangliang
name: Pukhov, Alexander
name: Shen, Baifei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We propose a new acceleration scheme that combines shock wave acceleration (SWA) and light pressure acceleration (LPA). When a thin foil driven by light pressure of an ultra-intense laser pulse propagates in underdense background plasma, it serves as a shock-like piston, trapping and reflecting background protons to ultra-high energies. Unlike in SWA, the piston velocity is not limited by the Mach number and can be highly relativistic. Background protons can be trapped and reflected forward by the enormous "dragging field" potential behind the piston which is not employed in LPA. Our one- and two-dimensional particle-in-cell simulations and analytical model both show that proton energies of several tens to hundreds of GeV can be obtained, while the achievable energy in simple LPA is below 10 GeV.
description: submitted
Dark Radiation and interacting scenarios
Creators: name: Diamanti, Roberta
name: Giusarma, Elena
name: Mena, Olga
name: Archidiacono, Maria
name: Melchiorri, Alessandro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An extra dark radiation component can be present in the universe in the form of sterile neutrinos, axions or other very light degrees of freedom which may interact with the dark matter sector. We derive here the cosmological constraints on the dark radiation abundance, on its effective velocity and on its viscosity parameter from current data in dark radiation-dark matter coupled models. The cosmological bounds on the number of extra dark radiation species do not change significantly when considering interacting schemes. We also find that the constraints on the dark radiation effective velocity are degraded by an order of magnitude while the errors on the viscosity parameter are a factor of two larger when considering interacting scenarios. If future Cosmic Microwave Background data are analysed assuming a non interacting model but the dark radiation and the dark matter sectors interact in nature, the reconstructed values for the effective velocity and for the viscosity parameter will be shifted from their standard 1/3 expectation, namely ceff=0.34 (+0.006 -0.003) and cvis=0.29 (+0.002 -0.001) at 95% CL for the future COrE mission data.
description: 8 pages, 6 figures
Effect of change of Rail profile on Rolling Contact Fatigue stress at Wheel-Rail Interface
Creators: name: Teklebrhan Abebe
Publisher: name: Zenodo
Year: 2017

description: The general objective of this thesis is to analyze effect of change of radiuses curvature of Rail profile on contact fatigue stress using analytic and finite element software’s. The formulation in this study aims primarily at determination of stresses and fatigue parameters by varying contact area arising from variation in radiuses curvature of Rail profile. A change in radiuses curvature of Rail profile brings in a change in contact area and stresses. The theoretical models are based on the normal problem (Hertz theory) correspondingly, variations in the results in terms of principal stresses and fatigue parameters such as equivalent stresses, fatigue damage, and expected fatigue life with changes in radiuses curvature of Rail profile are obtained. Comparisons of different radiuses curvature of Rail profile are taken place
Magnetic properties, Lyapunov exponent and superstability of the spin-1/2 Ising-Heisenberg model on diamond chain
Creators: name: Ananikian, N. S.
name: Hovhannisyan, V. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The exactly solvable spin-1/2 Ising-Heisenberg model on diamond chain has been considered. We have found the exact results for the magnetization by using recursion relation method. The existence of the magnetization plateau has been observed at one third of the saturation magnetization in the antiferromagnetic case. Some ground-state properties of the model are examined. At low temperatures, the system has two ferrimagnetic (FRI1 and FRI2) phases and one paramagnetic (PRM) phase. Lyapunov exponents for the various values of the exchange parameters and temperatures have been analyzed. It have also been shown that the maximal Lyapunov exponent exhibits plateau. Lyapunov exponents exhibit different behavior for two ferrimagnetic phases. We have found the existence of the supercritical point for the multi-dimensional rational mapping of the spin-1/2 Ising-Heisenberg model on diamond chain for the first time at absence of the external magnetic field and $T \rightarrow 0$ in the antiferromagnetic case.
description: 11 pages, 6 figures
Caroloptes fagivagrans Keifer 1940
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Eriophyidae
Caroloptes
Caroloptes fagivagrans

description: Caroloptes fagivagrans Keifer, 1940
 Caroloptes fagivagrans Keifer, 1940: 166.
 Caroleptes fagivagrans; Amrine & Stasny, 1994: 155.
 Caroloptes fagivagrans; Baker, et al., 1996: 142.
 Host. Fagus grandifolia, F. sylvatica (Fagaceae).
 Relation to host. Vagrant.
 Distribution. USA.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 51, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Minimal see-saw model predicting best fit lepton mixing angles
Creators: name: King, S. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a minimal predictive see-saw model in which the right-handed neutrino mainly responsible for the atmospheric neutrino mass has couplings to (nu_e, nu_mu, nu_tau) proportional to (0,1,1) and the right-handed neutrino mainly responsible for the solar neutrino mass has couplings to (nu_e, nu_mu, nu_tau) proportional to (1,4,2), with a relative phase eta = -2pi/5. We show how these patterns of couplings could arise from an A_4 family symmetry model of leptons, together with Z_3 and Z_5 symmetries which fix eta = -2pi/5 up to a discrete phase choice. The PMNS matrix is then completely determined by one remaining parameter which is used to fix the neutrino mass ratio m_2/m_3. The model predicts the lepton mixing angles theta12=34 degrees, theta23=41 degrees, theta13=9.5 degrees, which exactly coincide with the current best fit values for a normal neutrino mass hierarchy, together with the distinctive prediction for the CP violating oscillation phase delta =106 degrees.
description: 15 pages. arXiv admin note: substantial text overlap with arXiv:1304.6264
Thermally activated conductance in arrays of small Josephson junctions
Creators: name: Zimmer, J.
name: Vogt, N.
name: Fiebig, A.
name: Syzranov, S. V.
name: Lukashenko, A.
name: Schäfer, R.
name: Rotzinger, H.
name: Shnirman, A.
name: Marthaler, M.
name: Ustinov, A. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present measurements of the temperature-dependent conductance for series arrays of small-capacitance SQUIDs. At low bias voltages, the arrays exhibit a strong Coulomb blockade, which we study in detail as a function of temperature and Josephson energy $E_J$. We find that the zero-bias conductance is well described by thermally activated charge transport with the activation energy on the order of $ΛE_C$, where $Λ$ is the charge screening length in the array and $E_C$ is the charging energy of a single SQUID.
description: 6 pages, 3 figures
An architectural framework for self-configuration and self-improvement at runtime
Creators: name: Tomforde, Sven
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Organic computing
subject: framework
subject: self-improvement
subject: self-configuration
subject: safety-oriented learning
subject: machine learning
subject: traffic control
subject: network protocols
subject: learning classifier systems
subject: Selbstverbesserung
subject: Selbstkonfiguration
subject: sicherheitsorientiertes Lernen
subject: maschinelles Lernen
subject: Verkehrssteuerung
subject: Netzwerkprotokoll
subject: Learning Classifier Systeme
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: [no abstract]
Incentives in matching markets: counting and comparing manipulating agents
Creators: name: Somouaoga Bonkoungou
name: Nesterov, Alexander
Publisher: name: Zenodo
Year: 2022
Subjects: market design, two-sided matching, college admissions, school choice, manipulability

description: Manipulability is a threat to the successful design of centralized matching markets. However, in many applications some manipulation is inevitable and the designer wants to compare manipulable mechanisms. We count the number of agents with an incentive to manipulate and rank mechanisms by their level of manipulability. This ranking sheds a new light on practical design decisions such as the design of the entry-level medical labor market in the US, and school admissions systems in New York, Chicago, Denver and many cities in Ghana and in the UK.
Hint of 150 MHz radio emission from the Neptune-mass extrasolar transiting planet HAT-P-11b
Creators: name: Etangs, A. Lecavelier des
name: Sirothia, S. K.
name: Gopal-Krishna
name: Zarka, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Since the radio-frequency emission from planets is expected to be strongly influenced by their interaction with the magnetic field and corona of the host star, the physics of this process can be effectively constrained by making sensitive measurements of the planetary radio emission. Up to now, however, numerous searches for radio emission from extrasolar planets at radio wavelengths have only yielded negative results. Here we report deep radio observations of the nearby Neptune-mass extrasolar transiting planet HAT-P-11b at 150 MHz, using the Giant Meterwave Radio Telescope (GMRT). On July 16, 2009, we detected a 3-sigma emission whose light curve is consistent with an eclipse when the planet passed behind the star. This emission is at a position 14 arcsec from the transiting exoplanet's coordinates; thus, with a synthetized beam of FWHM~16 arcsec, the position uncertainty of this weak radio signal encompasses the location of HAT-P-11. We estimate a 5% false positive probability that the observed radio light curve mimics the planet's eclipse light curve. If the faint signature is indeed a radio eclipse event associated with the planet, then its flux would be 3.87 mJy +/- 1.29 mJy at 150 MHz. However, our equally sensitive repeat observations of the system on November 17, 2010 did not detect a significant signal in the radio light curve near the same position. This lack of confirmation leaves us with the possibility of either a variable planetary emission, or a chance occurrence of a false positive signal in our first observation. Deeper observations are required to confirm this hint of 150 MHz radio emission from HAT-P-11b.
description: Accepted for publication in Astronomy & Astrophysics
Biodiversity modelling in practice - predicting bird and woody plant species richness on farmlands
Creators: name: Sybertz, Janine
name: Matthies, Sarah
name: Schaarschmidt, Frank
name: Reich, Michael
name: Haaren, Christina Von
Publisher: name: Milton Park : Taylor & Francis
Year: 2019
Subjects: subject: Farmland birds
subject: Woody plants
subject: Hedges
subject: Landscape elements
subject: Farming practice
subject: Indicator based models
subject: Biodiversity evaluation
subject: Germany
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: In light of decreasing species richness on farmland and an increasing awareness of biodiversity issues among customers and food companies, concepts and models to evaluate and enhance farmland biodiversity are greatly needed. It is important that the models are easy to apply as they have to be utilized by practitioners such as farmers and their consultants. In this study, simple but valid predictors were identified to rapidly assess the species richness of birds and woody plants in hedgerows, an important farmland landscape element. Hedgerows were sampled in seven agricultural landscapes throughout Germany. By means of automatic model selection procedures, linear regression models were estimated to predict bird and woody plant species richness. Cross validation procedures were carried out in order to visualize model selection uncertainty and estimate the prediction error. Due to a rather high prediction error, the model for plants can only be recommended for use when field work is not feasible. The model for birds, however, explained 70.8% of the variance in species numbers. It may help farmers, food companies and nature conservation agencies to rapidly evaluate bird species richness in hedgerows on farmland and to identify potentials and appropriate measures for enhancing it.
An evaluation of the shortened high school duration in Germany and its impact on postsecondary education and labor market entry
Creators: name: Meyer, Tobias
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Shortened school duration
subject: postsecondary education
subject: labor market entry
subject: Schulzeitverkürzung
subject: nachschulische Bildung
subject: Berufseinstieg
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: [no abstract]