cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparative Analysis of Mesenchymal Stem Cell Cultivation in Fetal Calf Serum, Human Serum, and Platelet Lysate in 2D and 3D Systems
Creators: name: Kirsch, Marline
name: Rach, Jessica
name: Handke, Wiebke
name: Seltsam, Axel
name: Pepelanova, Iliyana
name: Strauß, Sarah
name: Vogt, Peter
name: Scheper, Thomas
name: Lavrentieva, Antonina
Publisher: name: Lausanne : Frontiers Media
Year: 2021
Subjects: subject: platelet lysate
subject: mesenchymal stem cells
subject: differentiation
subject: medium supplements
subject: fetal calf serum
subject: human serum
subject: gelatin methacryloyl (GelMA)
subject: hydrogel
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: In vitro two-dimensional (2D) and three-dimensional (3D) cultivation of mammalian cells requires supplementation with serum. Mesenchymal stem cells (MSCs) are widely used in clinical trials for bioregenerative medicine and in most cases, in vitro expansion and differentiation of these cells are required before application. Optimized expansion and differentiation protocols play a key role in the treatment outcome. 3D cell cultivation systems are more comparable to in vivo conditions and can provide both, more physiological MSC expansion and a better understanding of intercellular and cell-matrix interactions. Xeno-free cultivation conditions minimize risks of immune response after implantation. Human platelet lysate (hPL) appears to be a valuable alternative to widely used fetal calf serum (FCS) since no ethical issues are associated with its harvest, it contains a high concentration of growth factors and cytokines and it can be produced from expired platelet concentrate. In this study, we analyzed and compared proliferation, as well as osteogenic and chondrogenic differentiation of human adipose tissue-derived MSCs (hAD-MSC) using three different supplements: FCS, human serum (HS), and hPL in 2D. Furthermore, online monitoring of osteogenic differentiation under the influence of different supplements was performed in 2D. hPL-cultivated MSCs exhibited a higher proliferation and differentiation rate compared to HS- or FCS-cultivated cells. We demonstrated a fast and successful chondrogenic differentiation in the 2D system with the addition of hPL. Additionally, FCS, HS, and hPL were used to formulate Gelatin-methacryloyl (GelMA) hydrogels in order to evaluate the influence of the different supplements on the cell spreading and proliferation of cells growing in 3D culture. In addition, the hydrogel constructs were cultivated in media supplemented with three different supplements. In comparison to FCS and HS, the addition of hPL to GelMA hydrogels during the encapsulation of hAD-MSCs resulted in enhanced cell spreading and proliferation. This effect was promoted even further by cultivating the hydrogel constructs in hPL-supplemented media.
Entanglement-enhanced time-continuous quantum control in optomechanics
Creators: name: Hofer, Sebastian G.
name: Hammerer, Klemens
Publisher: name: College Park, MD : American Physical Society
Year: 2015
Subjects: subject: Quantum control
subject: Low-entropy mechanical state
subject: bipartite mechanical entanglement
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The cavity-optomechanical radiation pressure interaction provides the means to create entanglement between a mechanical oscillator and an electromagnetic field interacting with it. Here we show how we can utilize this entanglement within the framework of time-continuous quantum control, in order to engineer the quantum state of the mechanical system. Specifically, we analyze how to prepare a low-entropy mechanical state by (measurement-based) feedback cooling operated in the blue-detuned regime, the creation of bipartite mechanical entanglement via time-continuous entanglement swapping, and preparation of a squeezed mechanical state by time-continuous teleportation. The protocols presented here are feasible in optomechanical systems exhibiting a cooperativity larger than 1.
Geometry Optimization of Thermoelectric Modules: Deviation of Optimum Power Output and Conversion Efficiency
Creators: name: Wolf, Mario
name: Rybakov, Alexey
name: Hinterding, Richard
name: Feldhoff, Armin
Publisher: name: Basel : MDPI AG
Year: 2020
Subjects: subject: thermoelectric materials
subject: energy harvesting
subject: thermoelectric generator
subject: working points
subject: maximum electrical power point
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: Besides the material research in the field of thermoelectrics, the way from a material to a functional thermoelectric (TE) module comes alongside additional challenges. Thus, comprehension and optimization of the properties and the design of a TE module are important tasks. In this work, different geometry optimization strategies to reach maximum power output or maximum conversion efficiency are applied and the resulting performances of various modules and respective materials are analyzed. A Bi2Te3-based module, a half-Heusler-based module, and an oxide-based module are characterized via FEM simulations. By this, a deviation of optimum power output and optimum conversion efficiency in dependence of the diversity of thermoelectric materials is found. Additionally, for all modules, the respective fluxes of entropy and charge as well as the corresponding fluxes of thermal and electrical energy within the thermolegs are shown. The full understanding and enhancement of the performance of a TE module may be further improved
Fluctuations of inflationary magnetogenesis
Creators: name: Giovannini, Massimo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This analysis aims at exploring what can be said about the growth rate of magnetized inhomogeneities under two concurrent hypotheses: a phase of quasi-de Sitter dynamics driven by a single inflaton field and the simultaneous presence of a spectator field coupled to gravity and to the gauge sector. Instead of invoking ad hoc correlations between the various components, the system of scalar inhomogeneities is diagonalized in terms of two gauge-invariant quasi-normal modes whose weighted sum gives the curvature perturbations on comoving orthogonal hypersurfaces. The predominance of the conventional adiabatic scalar mode implies that the growth rate of magnetized inhomogeneities must not exceed 2.2 in Hubble units if the conventional inflationary phase is to last about 70 efolds and for a range of slow roll parameters between 0.1 and 0.001. Longer and shorter durations of the quasi-de Sitter stage lead, respectively, either to tighter or to looser bounds which are anyway more constraining than the standard backreaction demands imposed on the gauge sector. Since a critical growth rate of order 2 leads to a quasi-flat magnetic energy spectrum, the upper bounds on the growth rate imply a lower bound on the magnetic spectral index. The advantages of the uniform curvature gauge are emphasized and specifically exploited throughout the treatment of the multicomponent system characterizing this class of problems.
description: 37 pages, 4 figures
Salix breviserrata
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: S. breviserrata X grandifolia (= S. Hemisu Coquoz) - l: Salanfe, 1950m (Coquoz 1925). (Vgl. Heinis Lit. 1926,S.75.)
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Young People’s Perceptions of World Cultural Heritage: Suggestions for a Critical and Reflexive World Heritage Education
Creators: name: Röll, Verena
name: Meyer, Christiane
Publisher: name: Basel : MDPI AG
Year: 2020
Subjects: subject: World Cultural Heritage
subject: World Heritage education
subject: young people’s perceptions
subject: Eurocentrism
subject: Education for Sustainable Development
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: The paper analyses and discusses the perspectives of young people on World Cultural Heritage (WCH), focusing on their presumed reasons of its imbalanced global distribution. The qualitative study is based upon focus groups conducted with 43 secondary school students aged 14–17 years from Lower Saxony, Germany. The findings reveal Eurocentric thinking patterns. Furthermore, a site visit took place after the focus groups exploring the universal and personal values the participants attach to the WCH using hermeneutic photography. Due to these results and building upon an education for sustainable development that empowers learners to become sustainability citizens, the authors provide suggestions for a critical and reflexive World (Cultural) Heritage education.
On the realist aesthetics of digital de-aging in contemporary Hollywood cinema
Creators: name: Loock, Kathleen
Publisher: name: Oxford : John Wiley & Sons Ltd.
Year: 2021
Subjects: subject: digital de-aging
subject: Hollywood cinema
subject: memory
subject: realism
subject: visual effects
subject: Dewey Decimal Classification::800 | Literatur, Rhetorik, Literaturwissenschaft
subject: Dewey Decimal Classification::400 | Sprache, Linguistik

description: This essay examines digital de-aging—a process of making actors appear younger on-screen than they actually are that has taken a firm hold in contemporary Hollywood cinema—as a controversial filmmaking tool that raises fundamental questions about cinematic realism in the digital age. Since Hollywood’s visual effects are similar to the image manipulation that can be achieved with deepfake software, digital de-aging is framed as a complex creative process that supports the actors’ craft in order to distinguish it from the image manipulation and misinformation that has come to characterize the post-truth era. I will discuss the affordances and limitations of Hollywood’s “youthification” technology in terms of the shifting ontologies that characterize the transition from the photographic to the digital image, situate digital de-aging within larger debates about synthespians and the realistic portrayal of digitally created human beings, and argue that de-aging in films such as Gemini Man (Ang Lee, 2019) and The Irishman (Martin Scorsese, 2019) reconfigures linear temporalities and ultimately reshapes the concepts of time and memory by which we structure our life trajectories. © 2021 The Authors. Orbis Litterarum published by John Wiley & Sons Ltd.
Genauigkeitsuntersuchungen moderner Federgravimeter für Monitoringaufgaben in der Geophysik
Creators: name: Schilling, Manuel
name: Gitlein, Olga
name: Jahn, Grit
name: Vogel, Detlef
Publisher: name: Hamburg : Deutsche Geophysikalische Gesellschaft
Year: 2014
Subjects: subject: Gravimeter
subject: Gezeitenanalyse
subject: Vergleich
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Für Aufzeichnungen über längere Zeiträume sind Federgravimeter - z.B. im Vergleich zu Supraleitgravimetern - die fexibelste, technisch einfachste und vergleichsweise wirtschaftlichste Lösung, unterliegen aber dem Nachteil der Drift. Wir untersuchen die Genauigkeiten des Micro-g LaCoste gPhone-98 und ZLS Burris Gravity Meter B-64 des Instituts für Erdmessung. Mit beiden Instrumenten wurden Registrierungen über mehrere Monate auf fünf Stationen mit hohen und niedrigen seismischen Störungen durchgeführt. Untersucht wird zudem eine parallele Registrierung des ZLS mit dem Supraleitgravimeter in Onsala (Schweden). Die Gezeitenanalyse gleichzeitiger Datenreihen beider Instrumente zeigt, dass die Gezeitenparameter der täglichen und halbtäglichen Gezeiten mit 0.04% (O1,K1,M2) bis 0.16% (S2) übereinstimmen. Sowohl für das g-98 als auch das B-64 wurde eine Stabilität des linearen Eichfaktors von 3x10e-4 ermittelt. Im Allgemeinen verhält sich die Drift eines gPhones nach einer gewissen Einlaufphase linear. Der Betrag und die Variation der Drift des g-98 nahm im Nutzungszeitraum nach jedem Standortwechsel ab und liegt derzeit bei etwa 90 nm/s^2 pro Tag. Im Gegensatz dazu zeigt das B-64 deutlich ein nichtlineares Verhalten. Das Leibniz-Institut für Angewandte Geophysik besitzt das gPhoneX-129 seit Ende 2012. Anhand einer acht Monate langen parallelen Registrierung mit dem g-98 werden diese Geräte unterschiedlicher Generationen verglichen. Diese erste Langzeitregistrierung des gX-129 zeigt die Entwicklung der Gerätedrift eines fabrikneuen Gerätes im Vergleich zu einem bereits seit 3 Jahren im Gebrauch befi ndlichen Gerätes. Insbesondere die Abweichungen von einem linearen Driftverhalten erschweren die Unterscheidung zwischen Signal und Drift. Zusätzlich wird der Einfluss unterschiedlicher Datenerfassungsraten (1 und 7 Hz) untersucht. Die Qualität der Zeitreihen der drei Gravimeter wird durch eine Gezeitenanalyse bewertet sowie die Langzeitstabilität der Instrumente getestet.
[Rez. o.T. zu: Ziesche, Rudolf: Der Manuskriptnachlaß Gerhart Hauptmanns. Teil 3. GH Hs 471-780. Anhang 1-80 u. Teil 4. Register]
Creators: name: Tempel, Bernhard
Publisher: name: Berlin : Erich Schmidt Verlag
Year: 2002
Subjects: subject: Hauptmann, Gerhart
subject: Nachlass
subject: Verzeichnis
subject: Deutsch
subject: Literatur
subject: Literarischer Nachlass
subject: Katalog
subject: Hauptmann, Gerhart
subject: Dewey Decimal Classification::800 | Literatur, Rhetorik, Literaturwissenschaft::830 | Deutsche Literatur

description: Rezension des Katalogs zum Manuskriptnachlaß Gerhart Hauptmanns mit Hinweisen auf weitere Verzeichnisse des Hauptmann-Nachlasses (Briefnachlaß, Dokumente, Sammlung, Bibliothek) und von Nachlässen im Umfeld Hauptmanns (vor allem seiner zweiten Frau Margarete Hauptmann).
Observation of conduction electron spin resonance in boron doped diamond
Creators: name: Szirmai, Péter
name: Fábián, Gábor
name: Koltai, János
name: Náfrádi, Bálint
name: Forró, László
name: Pichler, Thomas
name: Williams, Oliver A.
name: Mandal, Soumen
name: Bäuerle, Christopher
name: Simon, Ferenc
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We observe the electron spin resonance of conduction electrons in boron doped (6400 ppm) superconducting diamond (Tc =3.8 K). We clearly identify the benchmarks of conduction electron spin resonance (CESR): the nearly temperature independent ESR signal intensity and its magnitude which is in good agreement with that expected from the density of states through the Pauli spin-susceptibility. The temperature dependent CESR linewidth weakly increases with increasing temperature which can be understood in the framework of the Elliott-Yafet theory of spin-relaxation. An anomalous and yet unexplained relation is observed between the g-factor, CESR linewidth, and the resistivity using the empirical Elliott-Yafet relation.
description: 10 pages, 11 figures, submitted to Phys. Rev. B
Selectivity of TiOx-Based Electron-Selective Contacts on n-Type Crystalline Silicon and Solar Cell Efficiency Potential
Creators: name: Titova, Valeriya
name: Schmidt, Jan
Publisher: name: Weinheim : Wiley-VCH
Year: 2021
Subjects: subject: atomic layer deposition
subject: contact resistivities
subject: electron-selective contacts
subject: selectivities
subject: SiOy/TiOx/Al stacks
subject: titanium oxide
subject: Belt conveyors
subject: Efficiency
subject: Extraction
subject: Low temperature production
subject: Metallizing
subject: Silicon
subject: Temperature
subject: Titanium oxides
subject: Contact resistivities
subject: Industrial conveyors
subject: Lifetime measurements
subject: Low temperature annealing
subject: Recombination currents
subject: Selectivity parameters
subject: Solar cell efficiencies
subject: Specific contact resistivity
subject: Silicon solar cells
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The selectivity parameter S10 of titanium oxide (TiOx)-based selective contacts on n-type silicon is experimentally extracted through measurements of the specific contact resistivity ρc and the recombination current density prefactor J0, both parameters measured on fully Al-metallized samples. The contact resistivity ρc is determined applying the Cox and Strack method and the J0 values are extracted using dynamic infrared lifetime mapping, allowing for contactless lifetime measurements on fully metallized silicon samples in contrast to conventionally applied lifetime measurement techniques. The highest selectivity after annealing of an n-Si/SiOy/TiOx/Al contact is determined to be S10 = 11.6, which corresponds to a maximum achievable efficiency of 24.1% for this type of electron-selective contact. The maximum selectivity is achieved after low-temperature annealing at 500 °C or through a contact-firing step at a set-peak temperature of 820 °C in an industrial conveyor-belt furnace, as used in today's commercial solar cell production. © 2021 The Authors. physica status solidi (RRL) Rapid Research Letters published by Wiley-VCH GmbH
Low-energy E1 strength in select nuclei: Possible constraints on the neutron skins and the symmetry energy
Creators: name: Inakura, Tsunenori
name: Nakatsukasa, Takashi
name: Yabana, Kazuhiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Correlations between low-lying electric dipole (E1) strength and neutron skin thickness are systematically investigated with the fully self-consistent random-phase approximation using the Skyrme energy functionals. The presence of strong correlation among these quantities is currently under dispute. We find that the strong correlation is present in properly selected nuclei, namely in spherical neutron-rich nuclei in the region where the neutron Fermi levels are located at orbits with low orbital angular momenta. The significant correlation between the fraction of the energy-weighted sum value and the slope of the symmetry energy is also observed. The deformation in the ground state seems to weaken the correlation.
description: 5 pages, 7 figures
Salix breviserrata
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: S. breviserrata X hastata - 3: Findelen bei Zermatt (P., teste R. Görz). - 4: Rhonegletscher (P., teste R. Görz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Femtosecond laser-induced surface modification of the electrolyte in solid oxide electrolysis cells
Creators: name: Marquardt, Tobias
name: Hollmann, Jan
name: Gimpel, Thomas
name: Schade, Wolfgang
name: Kabelac, Stephan
Publisher: name: Basel : MDPI AG
Year: 2020
Subjects: subject: solid oxide electrolysis cell
subject: electrochemical impedance spectroscopy
subject: distribution of relaxation time
subject: femtosecond laser
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Electrolyte-supported solid oxide cells are often used for steam electrolysis. Advantages are high mechanical stability and a low degradation rate. The aim of this proof of concept study was to use a femtosecond laser to process the electrolyte of an electrolyte-supported solid oxide cell and evaluate the effect of this laser treatment on the electrochemical performance. The femtosecond laser treatment induces a macroscopic and a superimposed microscopic structure. It can be proven that the electrolyte remains gas tight and the electrochemical performance increases independently of the laser parameters. The initial area-specific resistance degradation during a constant current measurement of 200 h was reduced from 7.9% for a non-treated reference cell to 3.2% for one of the laser-treated cells. Based on electrochemical impedance measurements, it was found that the high frequency resistance of the laser-treated cells was reduced by up to 20% with respect to the reference cell. The impedance spectra were evaluated by calculating the distribution of relaxation times, and in advance, a novel approach was used to approximate the gas concentration resistance, which was related to the test setup and not to the cell. It was found that the low frequency polarization resistance was increased for the laser-treated cells. In total, the area-specific resistance of the laser-treated cells was reduced by up to 14%.
The Spin-down of PSR J0821-4300 and PSR J1210-5226: Confirmation of Central Compact Objects as Anti-Magnetars
Creators: name: Gotthelf, E. V.
name: Halpern, J. P.
name: Alford, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using XMM-Newton and Chandra, we measure period derivatives for the second and third known pulsars in the class of Central Compact Objects (CCOs) in supernova remnants, proving that these young neutron stars have exceptionally weak dipole magnetic field components. For the 112 ms PSR J0821-4300 in Puppis A, Pdot = (9.28 +/- 0.36)E-18. Its proper motion, mu = 61 +/- 9 mas/yr, was also measured using Chandra. This contributes a kinematic term to the period derivative via the Shklovskii effect, which is subtracted from Pdot to derive dipole Bs = 2.9E10 G, a value similar to that of first measured CCO PSR J1852+0040 in Kes 79, which has Bs = 3.1E10 G. Antipodal surface hot spots with different temperatures and areas are deduced from the X-ray spectrum and pulse profiles. Paradoxically, such nonuniform surface temperature appears to require strong crustal magnetic fields, probably toroidal or quadrupolar components much stronger than the external dipole. A spectral feature, consisting of either an emission line at approximately 0.75 keV or absorption at approximately 0.46 keV, is modulated in strength with the rotation. It may be due to a cyclotron process in a magnetic field on the surface that is slightly stronger than the dipole deduced from the spin-down. We also timed anew the 424 ms PSR J12010-5226, resolving previous ambiguities about its spin-down rate. Its Pdot = (2.22 +/- 0.02)E-17, corresponding to Bs = 9.8E10 G. This is compatible with a cyclotron resonance interpretation of its prominent absorption line at 0.7 keV and harmonics. These results deepen the mystery of the origin and evolution of CCOs: why are their numerous descendants not evident?
description: 20 pages, 13 figure, 10 tables, accepted for publication in The Astrophysical Journal
Flaw detection on a tilted particleboard by use of the spec-radiation method
Creators: name: Schmelt, Andreas Sebastian
name: Twiefel, Jens
Publisher: name: Basel : MDPI AG
Year: 2020
Subjects: subject: spec-radiation
subject: angular spectrum
subject: flaw detection
subject: acoustic holography
subject: tilted particleboard
subject: Dewey Decimal Classification::600 | Technik

description: Herein, we present a novel approach to the spec-radiation method (a method of acoustical holography) for determining the sound distribution on a tilted particleboard by calculating a single plane and rotation in the frequency domain. The tilted particleboard allows testing without standing waves between the transmitter and the particleboard. This eliminates the need to evaluate several parallel planes and to search for values belonging to the tilted particleboard. The numerical requirements can be optimally exploited through a combination with a flaw detectability enhancement method. The results are supported by experiments on a wooden particleboard with flaw imitations. Finally, we showed, through a comparison with the usual procedure of identifying a flaw (calculating many parallel planes and then selecting the data belonging to the tilted plane), that the calculation of the tilted plane is up to 98.5% faster and improves the detectability of flaws in a tilted particleboard.
Cosmic Rays in the Inner Galaxy and the Diffusion Properties of the Interstellar Medium
Creators: name: Erlykin, Anatoly D.
name: Wolfendale, Arnold W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent measurements of cosmic gamma ray intensities up to TeV energies have been used to estimate the spectral shape of the parent cosmic ray particles present in the interstellar medium. The case is made for the particle spectrum in the Inner Galaxy being flatter than locally and in the Outer Galaxy. Of various possible explanations we make the case for the propagation of the particles being different in the more turbulent interstellar medium of the Inner Galaxy. The characteristic parameter alpha for the so called anomalous diffusion is expected to be less in the Inner Galaxy than that locally and the corresponding power law spectral exponent of the cosmic ray particles gamma will differ from that locally. Arguments are presented favouring a value of alpha lower than the local one by about Delta alpha = 0.2, the consequence is that Delta gamma = 0.1 for the parent particles.
description: 13 pages, 4 figures, accepted by 'Astroparticle Physics'
Anisotropic transport properties of graphene-based conductor materials
Creators: name: Slawig, Diana
name: Rizzi, Leo
name: Rothe, Tom
name: Schuster, Jörg
name: Tegenkamp, Christoph
Publisher: name: Dordrecht [u.a.] : Springer Science + Business Media B.V
Year: 2021
Subjects: subject: Anisotropy
subject: Anisotropic transport
subject: Conductor materials
subject: Electrical material parameters
subject: Experimental analysis
subject: Macroscopic conductivity
subject: Macroscopic properties
subject: Microscopic and macroscopic properties
subject: Microstructural simulation
subject: Graphene
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: We analyzed nanographite-based materials in a combined study including experimental analysis via 4-point probe STM and simulation to provide a complete picture of microscopic and macroscopic properties of the material. The two- and three-dimensional transport regimes were determined and evaluated regarding the anisotropy of the conductivity. The experimental results yield the full macroscopic conductivity tensor. Microstructural simulations are used to map those macroscopic properties to the microscopic building blocks of the sample. By combining those two, we present a coherent and comprehensive description of the electrical material parameters across several length scales. © 2021, The Author(s).
A hybrid model for the evolution of galaxies and Active Galactic Nuclei in the infrared
Creators: name: Cai, Zhen-Yi
name: Lapi, Andrea
name: Xia, Jun-Qing
name: De Zotti, Gianfranco
name: Negrello, Mattia
name: Gruppioni, Carlotta
name: Rigby, Emma
name: Castex, Guillaume
name: Delabrouille, Jacques
name: Danese, Luigi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [Abridged] We present a comprehensive investigation of the cosmological evolution of the luminosity function (LF) of galaxies and active galactic nuclei (AGN) in the infrared (IR). Based on the observed dichotomy in the ages of stellar populations of early-type galaxies on one side and late-type galaxies on the other, the model interprets the epoch-dependent LFs at z \geq 1.5 using a physical model for the evolution of proto-spheroidal galaxies and of the associated AGNs, while IR galaxies at z<1.5 are interpreted as being mostly late-type 'cold' (normal) and 'warm' (starburst) galaxies. As for proto-spheroids, in addition to the epoch-dependent LFs of stellar and AGN components separately, we have worked out the evolving LFs of these objects as a whole (stellar plus AGN component). The model provides a physical explanation for the observed positive evolution of both galaxies and AGNs up to z \simeq 2.5 and for the negative evolution at higher redshifts, for the sharp transition from Euclidean to extremely steep counts at (sub-)mm wavelengths, as well as the (sub-)mm counts of strongly lensed galaxies, that are hard to account for by alternative, physical or phenomenological, approaches. The evolution of late-type galaxies and of z<1.5 AGNs is described using a parametric phenomenological approach. The modeled AGN contributions to the counts and to the cosmic infrared background (CIB) are always subdominant with maximal at mid-IR wavelengths. The model provides a good fit to the multi-wavelength (from the mid-IR to millimeter waves) data on LFs at different redshifts and on number counts (both global and per redshift slices). A prediction of the present model is a systematic variation with wavelength of the populations dominating the counts and the contributions to the CIB intensity. The implied specific trend for cross-wavelength CIB power spectra is found to be in good agreement with the data.
description: 48 pages, 18 figures, Accepted by Astrophysical Journal. Model predictions and observational data are available in http://people.sissa.it/~zcai/galaxy_agn/
The Surface Tension of Magnetized Quark Matter
Creators: name: Garcia, A. F.
name: Pinto, M. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The surface tension of quark matter plays a crucial role for the possibility of quark matter nucleation during the formation of compact stellar objects and also for the existence of a mixed phase within hybrid stars. However, despite its importance, this quantity does not have a well established numerical value. Some early estimates have predicted that, at zero temperature, the value falls within the wide range $γ_0\approx10-300{\rm\ MeV/fm^2}$ but, very recently, different model applications have reduced these numerical values to fall within the range $γ_0\approx5-30{\rm\ MeV/fm^2}$ which would favor the phase conversion process as well as the appearance of a mixed phase in hybrid stars. In magnetars one should also account for the presence of very high magnetic fields which may reach up to about $ eB\approx 3-30\, m_π^2$ ($B \approx 10^{19}-10^{20} \,G$) at the core of the star so that it may also be important to analyze how the presence of a magnetic field affects the surface tension. With this aim we consider magnetized two flavor quark matter, described by the Nambu--Jona-Lasinio model. We show that although the surface tension oscillates around its B=0 value, when $0 < eB \lesssim 10 \, m_π^2$, it only reaches values which are still relatively small. For $eB \approx 5\, m_π^2$ the B=0 surface tension value drops by about 30% while for $eB \gtrsim 10\, m_π^2$ it quickly raises with the field intensity so that the phase conversion and the presence of a mixed phase should be suppressed if extremely high fields are present. We also investigate how thermal effects influence the surface tension for magnetized quark matter.
description: 12 pages, 8 figures. arXiv admin note: substantial text overlap with arXiv:1207.5186
Fate of trace organic compounds in hyporheic zone sediments of contrasting organic carbon content and impact on the microbiome
Creators: name: Rutere, Cyrus
name: Posselt, Malte
name: Horn, Marcus A.
Publisher: name: Basel : MDPI AG
Year: 2020
Subjects: subject: total organic carbon
subject: trace organic compounds
subject: hyporheic zone
subject: sediments
subject: amplicon sequencing
subject: microbial diversity
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: The organic carbon in streambed sediments drives multiple biogeochemical reactions, including the attenuation of organic micropollutants. An attenuation assay using sediment microcosms differing in the initial total organic carbon (TOC) revealed higher microbiome and sorption associated removal efficiencies of trace organic compounds (TrOCs) in the high-TOC compared to the low-TOC sediments. Overall, the combined microbial and sorption associated removal efficiencies of the micropollutants were generally higher than by sorption alone for all compounds tested except propranolol whose removal efficiency was similar via both mechanisms. Quantitative real-time PCR and time-resolved 16S rRNA gene amplicon sequencing revealed that higher bacterial abundance and diversity in the high-TOC sediments correlated with higher microbial removal efficiencies of most TrOCs. The bacterial community in the high-TOC sediment samples remained relatively stable against the stressor effects of TrOC amendment compared to the low-TOC sediment community that was characterized by a decline in the relative abundance of most phyla except Proteobacteria. Bacterial genera that were significantly more abundant in amended relative to unamended sediment samples and thus associated with biodegradation of the TrOCs included Xanthobacter, Hyphomicrobium, Novosphingobium, Reyranella and Terrimonas. The collective results indicated that the TOC content influences the microbial community dynamics and associated biotransformation of TrOCs as well as the sorption potential of the hyporheic zone sediments.
Salix breviserrata
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: S. breviserrata X retusa - l: Salanfe, 1950 m (Coquoz 1927).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Magnetic Behaviour of the $Bi_{2-y} Sr_y Ir_2 O_7$ Pyrochlore Solid Solution
Creators: name: Cosio-Castaneda, C.
name: de la Mora, P.
name: Morales, F.
name: Escudero, R.
name: Tavizon, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The temperature dependence of magnetic susceptibility of the Bi$_{2-y}$Sr$_{y}$Ir$_{2}$O$_{7}$ system was studied from 2 to 300 K. According to these measurements, the solid solution $(0\leq y\leq 0.9)$ does not show any magnetic transition; however, a noticeable deviation from the Curie-Weiss law occurs and the magnetic behavior of this system can be ascribed to short-range magnetic order that is also present in several geometrically frustrated systems. The Pauli magnetic susceptibility decreases as the Sr content increases, this can be associated with a shift towards Ir$^{5+}$ in samples; also the Ir effective magnetic moment decreases. The estimated Wilson-ratio indicates the presence of strong electron-electron correlations.
description: Accepetd in: Journal of Solid State Chemistry
Physics performances for Scalar Electron, Scalar Muon and Scalar Neutrino searches at 3 TeV and 1.4 TeV at CLIC
Creators: name: Battaglia, Marco
name: Blaising, Jean-Jacques
name: Marshall, John S.
name: Thomson, Mark
name: Sailer, Andre
name: Poss, Stephan
name: van der Kraaij, Erik
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The determination of scalar lepton and gaugino masses is an important part of the programme of spectroscopic studies of Supersymmetry at a high energy e+e- linear collider. In this article we present results of a study of the processes: e+e- -> eR eR -> e+e- chi0 chi, e+e- -> muR muR -> mu mu- chi0 chi0, e+e- -> eL eL -> e e chi0 chi0 and e+e- -> snu_e snu_e -> e e chi+ chi-in two Supersymmetric benchmark scenarios at 3 TeV and 1.4 TeV at CLIC. We characterize the detector performance, lepton energy resolution and boson mass resolution. We report the accuracy of the production cross section measurements and the eR muR, snu_e, chi+ and chi0 mass determination, estimate the systematic errors affecting the mass measurement and discuss the requirements on the detector time stamping capability and beam polarization. The analysis accounts for the CLIC beam energy spectrum and the dominant beam-induced background. The detector performances are incorporated by full simulation and reconstruction of the events within the framework of the CLIC_ILD_CDR detector concept.
Industrialisierung und gesellschaftlicher Wandel in der Region : ein Beispiel: die Vorortgemeinde Weende bei Göttingen im 19. und frühen 20. Jahrhundert
Creators: name: Schäfer-Richter, Uta
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Regional industrialization
subject: social change
subject: Lower Saxonia
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: [no abstract]
Funktionelle Analyse des Rab3/Rabphilin-Zyklus in Maus-Nullmutanten
Creators: name: Schlüter, Oliver M.
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Rab3
subject: rabphilin
subject: mouse deletion mutants
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Gibbs-Tolman approach to the curved interface effects in asymmetric nuclei
Creators: name: Kolomietz, V. M.
name: Sanzhur, A. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We redefine the surface tension coefficient and the symmetry energy for an asymmetric nuclear Fermi-liquid drop with a finite diffuse layer. Considering two-component charged Fermi-liquid drop and following Gibbs-Tolman concept, we introduce the equimolar radius $R_{e}$ of sharp surface droplet at which the surface tension is applied and the radius of tension surface $R_{s}$ (Laplace radius) which provides the minimum of the surface tension coefficient $σ$. We have shown that the nuclear Tolman length $ξ$ is negative and the modulus of $ξ$ growth quadratically with asymmetry parameter $X=(N-Z)/(N+Z)$.
description: 10 pages, 7 figures. arXiv admin note: text overlap with arXiv:1110.1566
title: Mehr als nur Eisen. Die Epitaphien der Hüttenmeister und Äbte des Klosters Königsbronn
Creators: name: Blumer, Rolf-Dieter
name: Mahnke, Shimon
name: Numberger, Markus
Publisher: name: University Library Heidelberg
Year: 2015

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 44, Nr. 4 (2015), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Ein Grenzumgang mit Folgen. Die Restaurierung aller Grenzsteine entlang der Gemarkungsgrenze Eppingen–Kleingartach
Creators: name: Sachsenheimer, Gotthilf
Publisher: name: University Library Heidelberg
Year: 2015

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 44, Nr. 4 (2015), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Neue Reaktionen funktionalisierter Benzocyclobuten-Chromkomplexe : Acylphosphane, Isochromanone und bimetallische Übergangsmetallkomplexe
Creators: name: Schnebel, Matthias
Publisher: name: Hannover : Universität
Year: 2001
Subjects: subject: Acylphosphane
subject: ligand exchange
subject: isochromanone
subject: BSA
subject: bimetalic transition metal complexes
subject: oxacarbene
subject: vinylcyclobutene-cyclohexadiene-rearrangement
subject: chromium complexes
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
title: Nachruf Mostefa Kokabi
Creators: name: Keefer, Erwin
Publisher: name: University Library Heidelberg
Year: 2015

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 44, Nr. 4 (2015), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Zu jung, zu alt, zu schwach? Altersgrenzen im Privatrecht
Creators: name: Baldus, Christian
Publisher: name: University Library Heidelberg
Year: 2012

description: Viele Menschen sind von ihrer Entscheidungsfreiheit im Wirtschaftsleben überfordert: Sie werden verleitet von Werbung und Konsumdruck, können Angebote nicht beurteilen und stürzen sich in Schulden. Das Privatrecht soll die Betroffenen unter anderem durch Altersgrenzen vor diesen Fallen bewahren. Sind die gesetzlich festgelegten Grenzen aber geeignet, Jugendliche an Eigenverantwortung heranzuführen und demente Menschen in sinnvollem Umfang zu schützen? Hier zeigt sich eine strukturelle Herausforderung an das allgemeine Privatrecht: Wie kann es Freiheit und Gerechtigkeit zwischen Privatpersonen im Wandel der sozialen Verhältnisse sichern, und zwar möglichst, ohne ständig neue Normen, Kategorien und Institutionen zu schaffen?
description: Ruperto Carola, Nr. 1 (2012): Alt & Jung, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2
Field-induced long-range magnetic order in the spin-singlet ground state system YbAl3C3: Neutron diffraction study
Creators: name: Khalyavin, D. D.
name: Adroja, D. T.
name: Manuel, P.
name: Daoud-Aladine, A.
name: Kosaka, M.
name: Kondo, K.
name: McEwen, K. A.
name: Pixley, J. H.
name: Si, Qimiao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The $4f$-electron system YbAl$_3$C$_3$ with a non-magnetic spin-dimer ground state has been studied by neutron diffraction in an applied magnetic field. A long-range magnetic order involving both ferromagnetic and antiferromagnetic components has been revealed above the critical field H$_C\sim $ 6T at temperature T=0.05K. The magnetic structure indicates that the geometrical frustration of the prototype hexagonal lattice is not fully relieved in the low-temperature orthorhombic phase. The suppression of magnetic ordering by the remanent frustration is the key factor stabilizing the non-magnetic singlet ground state in zero field. Temperature dependent measurements in the applied field H=12T revealed that the long-range ordering persists up to temperatures significantly higher than the spin gap indicating that this phase is not directly related to the singlet-triplet excitation. Combining our neutron diffraction results with the previously published phase diagram, we support the existence of an intermediate disordered phase as the first excitation from the non-magnetic singlet ground state. Based on our results, we propose YbAl$_3$C$_3$ as a new material for studying the quantum phase transitions of heavy-fermion metals under the influence of geometrical frustration.
title: Geburt und Tod der Sterne. Über die Entwicklungsphasen der Gestirne
Creators: name: Dullemond, Cornelis
name: Klessen, Ralf S.
Publisher: name: University Library Heidelberg
Year: 2012

description: 100 Jahre – so lange lebt kaum ein Mensch, in der Astronomie jedoch ist diese Zeitspanne fast bedeutungslos: Nicht einen einzigen vollständigen Umlauf um die Sonne kann der Planet Neptun in einem Jahrhundert zurücklegen; und unser Sonnensystem vollzieht in dieser Zeit weniger als ein Millionstel seiner Bahn um das Zentrum der Milchstraße. Wenn Menschen über kosmische Objekte nachdenken, müssen sie sich auf Zeiträume von Jahrmillionen und Jahrmilliarden einlassen. Die Begriffe Jung und Alt erhalten dabei gänzlich andere Dimensionen.
description: Ruperto Carola, Nr. 1 (2012): Alt & Jung, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2
title: Imagine There's No Heaven. Die Rede vom Himmel
Creators: name: Welker, Michael
Publisher: name: University Library Heidelberg
Year: 2013

description: Nach biblischem Verständnis sind Himmel und Gestirne von Gott geschaffen – sie sind Geschöpfe, keine Gottheiten. Mit dieser Auffassung steht die Bibel anderen Schöpfungsmythen entgegen. Doch selbst die biblische Tradition spricht wie andere Religionen vom Himmel als „Wohnsitz Gottes“ oder von „Gott im Himmel“. Denn vom Himmel kommen nicht nur die großen natürlichen, sondern auch die geistigen und geistlichen Kräfte Gottes. Der Himmel hat also eine Doppelfunktion. Manche Sprachen wie die Englische können dies ausdrücken, indem sie den natürlichen Himmel – „sky“ – vom geistigen Himmel – „heaven“ – unterscheiden. Die deutsche Sprache verfügt nicht über diese Differenzierung. Das hat der auf den Himmel konzentrierten Kritik an der Religion den Boden bereitet. Was hat es mit der religiösen Rede vom Himmel auf sich?
description: Ruperto Carola, Nr. 2 (2013): Himmel & Hölle, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2
title: Den Himmel betrachten, die Hölle verstehen. Telegramm aus dem Inneren der Erde
Creators: name: Bobrowski, Nicole
name: Platt, Ulrich
Publisher: name: University Library Heidelberg
Year: 2013

description: Im Jahr 1864 beschrieb der französische Schriftsteller Jules Verne die Reise zum Mittelpunkt der Erde. In der Realität ist es den Wissenschaftlern bis heute nicht gelungen, in das geheimnisvolle Innere unseres Planeten vorzustoßen. Wir müssen uns mit indirekten Hinweisen begnügen, beispielsweise mit Gasen, die von Vulkanen – den Toren zum Innern der Erde – freigesetzt werden. Die in Vulkanfahnen nachweisbaren Gase erlauben Rückschlüsse auf Vorgänge unter der Erdkruste und können genutzt werden, um drohende Vulkanausbrüche vorherzusagen. Ein neuer Kandidat für ein präziseres Frühwarnsystem ist das Spurengas Brommonoxid.
description: Ruperto Carola, Nr. 2 (2013): Himmel & Hölle, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2
title: Sehnsucht nach Frieden. Geschichte der Gewalt
Creators: name: Pauen, Sabina
name: Schneidmüller, Bernd
Publisher: name: University Library Heidelberg
Year: 2014

description: Über Jahrtausende hinweg galten Kriege als Normalzustand. Erst die maßlose Gewalt und die bis dahin undenkbaren Gräuel der zwei Weltkriege führten Mitte des 20. Jahrhunderts zum Umdenken: Der Wert des Friedens wurde zum öffentlichen Thema und die Friedensbewegung erfuhr enormen Zuspruch. Kriegerische Konflikte gelten im europäischen Kulturkreis seitdem als geächtet. Über die vielfältige Gestalt
von Krieg und Frieden und die Bedeutung beider Phänomene für Völker, Gesellschaften, Institutionen und Individuen diskutieren die Entwicklungs psychologin Sabina Pauen und der Historiker Bernd Schneidmüller.
description: Ruperto Carola, Nr. 4 (2014): Krieg & Frieden, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2
title: Der hungrige Krieg. Verletzte Seelen
Creators: name: Eckart, Wolfgang Uwe
Publisher: name: University Library Heidelberg
Year: 2014

description: Der Krieg von 1914 bis 1918 forderte Hunderttausende Opfer, die dem Grauen des hoch technisierten Mordens nicht gewachsen waren und seelisch dran zerbrachen. Stigmatisiert als Kriegszitterer, Simulanten und Feiglinge trafen die Soldaten auf Ärzte, die ihnen nicht helfend zur Seite standen, sondern allein darauf bedacht waren, den Willen ihrer Patienten zu brechen, um sie erneut gefügig zu machen für das Morden an der Front.
description: Ruperto Carola, Nr. 4 (2014): Krieg & Frieden, Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2012, Ausgaben pro Band: 2