cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Radon Emanations from Soils: Case Study of Central Ukrainian Uranium Province
Creators: name: Verkhovtsev ,  Valentyn
name: Dudar ,  Tamara Viktorivna
name: Tyshchenko ,  Yurii
name: Pokalyuk ,  Volodymyr
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Ukraine is known as a uranium mining country located in the Central-Eastern Europe. The authors have been studying radioecological situation within the Central Ukrainian Uranium Province where the uranium deposits are located (operated, dormant and perspective ones) for more than 10 years already. Radioecological research, including the radon emanations from soils, allowed us allocating radon-hazardous areas associated with uranium mineralization. The recently studied Mykhailivska ore area (south-eastern part of the Ukrainian Shield) is a unique one in terms of the location of two different types of uranium deposits here. One type is an endogenous deposit represented by the main ore body and almost 20 smaller ore anomalous. The other type belongs to exogenous infiltration uranium deposits type of Paleogene epoch uranium ore formation. The area of 15 km x 20 km was explored and more than 150 measurements of radon flux density (RFD) were made. The measurement RFD is based on the determination of the activity of radon accumulated due to the inflow of a known area from the soil surface, in a measuring chamber or sampler during pumping with a blower for 5 minutes. The exposure time of one sample is 20 minutes. Areas adjacent to uranium ore manifestations are characterized by increased levels of radon exhalation, which is typical for areas containing uranium minerals. High and average radon-prone areas were outlined and maps of radon anomalies prepared. Geological interpretation is supposed to be used while further planned uranium extraction through method of underground leaching within the researched territory.
Phosphorus Budget for Gull Lake, Michigan
Creators: name: Hamilton, Stephen K.
name: Weed, David B.
Publisher: name: Zenodo
Year: 2022

description: In this report, we summarize measurements of the P budget of Gull Lake, comparing a recent year of measurements (2013–14) of tributary inflows and the outflow with similar measurements made for the P budgets compiled by Tague (1977) and Tessier (unpublished). Tessier’s unpublished data are included as Appendix B. The 2013–14 data do not represent as complete a budget as the two previous ones, but are useful to consider whether watershed inputs of P via tributary inflows are changing. Watershed inputs are a particular concern for the Gull Lake Quality Organization because of new confined animal feeding operations and the applications of manure on croplands within the Gull Lake watershed.
Hadronic light-by-light scattering in the muon g-2: impact of proposed measurements of the (pi^0 -> gamma gamma) decay width and the (gamma^* gamma -> pi^0) transition form factor with the KLOE-2 experiment
Creators: name: Nyffeler, Andreas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss, how planned measurements at KLOE-2 of the (pi^0 -> gamma gamma) decay width and the (gamma^* gamma -> pi^0) transition form factor can improve estimates for the numerically dominant pion-exchange contribution to hadronic light-by-light scattering in the muon g-2 and what are the limitations related to the modelling of the off-shellness of the pion.
description: 4 pages, talk presented at MESON 2012 - 12th International Workshop on Meson Production, Properties and Interaction, Krakow, Poland, 31 May - 5 June 2012
Extremal Myers-Perry black holes coupled to Born-Infeld electrodynamics in odd dimensions
Creators: name: Allahverdizadeh, Masoud
name: Hendi, Seyed H.
name: Lemos, José P. S.
name: Sheykhi, Ahmad
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Employing higher order perturbation theory, we find a new class of perturbative extremal rotating black hole solutions with Born-Infeld electric charge in odd D-dimensional spacetime. The seed solution is an odd dimensional extremal Myers-Perry black hole with equal angular momenta to which a perturbative nonlinear electric Born-Infeld field charge q is added maintaining the extremality condition. The perturbations are performed up to third order. We also study some physical properties of these black holes. In particular, it is shown that the values of the gyromagnetic ratio of the black holes are modified by the perturbative parameter q and the Born-Infeld parameter β.
description: 12 pages, 2 figures
title: The Future of Geodata Management - the UK experiences
Creators: name: Hanghøj ,  Karen
name: Royse ,  Katherine
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: The fourth industrial revolution is changing how geoscience is carried out, how information is shared and how society and people engage with the world around them and with scientific discovery and data. Geoscience plays a crucial and central role supporting solutions to societal challenges such as the energy transition, understanding (and mitigating) geohazard risks and ensuring environmental sustainability and resilience. From a geodata management point of view this will only be achieved through an end-to-end data management process, from acquisition to delivery of quality-assured data. As we strive to understand ever more complex and interdependent earth systems we must have access to trusted and authorative data. This is critical for the development of our geoscience knowledge through the exploitation of emergent technology such as Artificial Intelligence, Machine Learning, Digital Twins, and the further use of autonomous systems. These new technologies will enable us to ‘forecast’ future scenarios, as well as develop ‘hindcasting’ techniques to calibrate and confirm hypotheses. Increasingly, modelling approaches informed by sensor networks and edge computing approaches drawn across the Internet of Things (IoT) and by novel data sources such as that from citizen science can also be used to develop ‘nowcasting’ techniques. This a key component of Digital Twin approaches. All of these new areas of digital geoscience research are reliant on well managed data. With the increasing access and availability of digital information in all areas of society, there is an expectation of openness and transparency in information used for evidence and decision making, especially from publicly-funded research institutes. Appropriate, ethical and responsible use of geoscience data and models, especially around the use of emerging technology, is essential. A fundamental requirement is that geoscience data is trusted, secure, authoritative and FAIR (findable, accessible, interoperable and reusable). To preserve data and to make data FAIR requires Trusted Repositories that follow the TRUST principles for digital repositories (transparency, responsibility, user focus, sustainability and appropriate technology). Open science has led to journals requesting access to both supporting data and models, and to data journals dedicated to data as a primary research output. This requires national data repositories to be certificated as trusted repositories and collaboration across the global geoscience community to enable interoperability and reuse.
Investigation of Micro-hollow Cathode Plasma Discharges
Creators: name: Lee, Felicity
Publisher: name: The Australian National University
Year: 2023

description: Plasma technology is an essential instrument of many fields, from the semi-conductor industry to exciting new applications in areas such as bio-medicine, agriculture and more. As these new avenues are explored, plasma processing must be able to act on large sample areas to be financially competitive to traditional methods. This brings us to a core challenge of plasma technology: scalability. The maximum area that a plasma can treat is pre-determined by the physical length of the system. As opposed to making reactors larger, one solution that has been considered is arrays of numerous micro-plasmas. The scaling of these systems is much simpler and comes with the advantage of being able to operate over a wide range of pressures. Of particular interest is the micro-hollow cathode discharge due to simplicity of design. However, as of right now, understanding of these discharges is limited due to its complex temporal and spatial behaviour. This thesis aims to shed some light on argon and nitrogen plasmas ignited in these micro-hollow cathode geometries. To observe spatial variations in plasma properties, a two-dimensional fluid model was developed in the finite element solver software COMSOL operating with argon and nitrogen chemistry. Results from argon simulations highlighted the importance of the cathode sheath region and demonstrated that excited plasma species could exist at quite extended distances away from the cathode hole itself. To examine argon plasma behaviour under different conditions, investigation of species properties with over a range of current and pressures was conducted. Preliminary results from the nitrogen fluid model were also presented, with particular focus on the nitrogen ion and excited neutral dynamics due to their relevance to plasma processing. To validate the findings of the model, plasma diagnostics on an experimental micro-hollow cathode system were also performed. Firstly, small amounts of hydrogen gas was leaked into the chamber to perform Stark broadening measurements to obtain electron density in argon. These values compared well with the model and the literature in different pressure and current regimes. Next, gas temperatures were estimated using the second positive band in nitrogen and found to be relatively (Tg < 400 K) cool and constant despite different conditions. This justified the use of a constant gas temperature in simulation. Finally, a collisional radiative model for argon was developed and the line-ratio method was used to determine values for electron density and temperature. The electron density obtained from this diagnostic technique showed significant differences to values found in both the Stark method and simulation but compared well to electron temperatures. Differences here were linked to difficulty determining the plasma length of the micro-hollow cathode. Overall, the model was found to be in reasonable agreement with experimental methods.
title: Vase mit Schlangenhenkeln
Creators: name: Glaser, Silvia
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 12 (2007): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Multiphoton ionization of the calcium atom by linearly and circularly polarized laser fields
Creators: name: Buica, Gabriela
name: Nakajima, Takashi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We theoretically study multiphoton ionization of the Ca atom irradiated by the second (photon energy 3.1 eV) and third (photon energy 4.65 eV) harmonics of Ti:sapphire laser pulses (photon energy 1.55 eV). Because of the dense energy level structure the second and third harmonics of a Ti:sapphire laser are nearly single-photon resonant with the ${4s4p}$ $^1P^o$ and ${4s5p}$ $^1P^o$ states, respectively. Although two-photon ionization takes place through the near-resonant intermediate states with the same symmetry in both cases, it turns out that there are significant differences between them. The photoelectron energy spectra exhibit the absence/presence of substructures. More interestingly, the photoelectron angular distributions clearly show that the main contribution to the ionization processes by the third harmonic arises from the far off-resonant ${4s4p}$ $^1P^o$ state rather than the near-resonant ${4s5p}$ $^1P^o$ state. These findings can be attributed to the fact that the dipole moment for the ${4s^2}$ $^1S^e$ - ${4s5p}$ $^1P^o$ transition is much smaller than that for the ${4s^2}$ $^1S^e$ - ${4s4p}$ $^1P^o$ transition.
title: Inhalt / Aktuelle Ausstellungen / Impressum
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 12 (2007): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Geology on Mars
Creators: name: Grotzinger ,  John P.
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: NASA's Mars Science Laboratory mission, with its Curiosity rover, has been exploring Gale crater since 2012 with the goal of assessing its potential to support life. The mission has compiled compelling evidence that the crater basin accumulated sediment transported by marginal rivers into lakes that likely persisted for millions of years in the early Hesperian. Fluids simultaneously circulated in the subsurface and likely existed through the dry phases of lake bed exposure and eolian deposition creating a continuously habitable deep biosphere environment that persisted of millions to even hundreds of millions of years, conceivably even into early Amazonian time. Geochemical and mineralogical assessments indicate that ancient environmental conditions would have been suitable for sustaining life, if it ever were present. A diversity of organic molecules has been preserved, though degraded, with evidence for more complex precursors. In situ studies of modern wind-driven sediment transport and multiple large and active aeolian deposits have led to advances in physical theory of boundary conditions and bedform development. Despite 9 years of exploration, rover systems and science instruments remain healthy and capable of performing all key scientific objectives.
title: Urtümliches – Alpenvolk. Ein geschnitztes Tuxer Bauernpaar
Creators: name: Kammel, Frank Matthias
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 14 (2007): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The Composition of Cosmic Rays at the Knee
Creators: name: Hoerandel, Joerg R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent results on the composition of cosmic rays in the energy region from about 10^14 to 10^18 eV are reviewed.
description: Invited talk, given at the Centenary Symposium 2012: Discovery of Cosmic Rays, June 2012, Denver
title: Sprudelnde „Bronzen“ der Renaissance. Brunnenfiguren der Paul Wolfgang Merkel'schen Familienstiftung
Creators: name: Kammel, Frank Matthias
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 18 (2008): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The initial 87Sr/86Sr of the Solar System
Creators: name: Di, Yankun
Publisher: name: The Australian National University
Year: 2023

description: Almost all planetary objects in the Solar System, including our Earth, exhibit systematic depletions of moderately volatile elements (MVEs) compared to the bulk chemical composition of the Solar System (represented by CI chondrites). However, the mechanisms and processes responsible for the ubiquitous planetary volatile depletion remain poorly understood. These MVE-depleted signatures may have been established in the interstellar medium or the molecular cloud parental to the Solar System and were inherited by planetary objects, or formed in any stage during the formation and evolution of a planetary body: incomplete condensation, re-evaporation of condensed materials, mixing of volatile-poor and volatile-rich components, accretion and collision, and degassing of magma oceans. As such, time is a critical parameter to constrain the mechanism of MVE depletion. The 87Rb-87Sr radioactive isotope system is suitable for estimating the time of volatile depletion owing to the large volatility contrast between Rb and Sr. To apply this chronometer to differentiated planetary bodies, a well-constrained Solar System initial 87Sr/86Sr value is required, which may be best represented by the initial 87Sr/86Sr of calcium-aluminium-rich inclusions (CAIs) from CV chondrites. However, previous attempts to determine the initial 87Sr/86Sr in CAIs did not yield a consistent conclusion. In this Ph.D. study, I (1) identify and systematically evaluate the factors that potentially limit the progress towards a consistent Solar System initial 87Sr/86Sr; (2) study the 87Rb-86Sr, and several other isotopic systems of a large collection of diverse CAIs; and (3) attempt to estimate a reliable Solar System initial 87Sr/86Sr value. Based on a detailed discussion of possible sources of systematic errors during 87Sr/86Sr measurements and calibration against multiple standards, we eliminate the inter-laboratory biases between this and previous studies. By analysing the stable Sr isotopic composition (delta-88Sr) and developing a fractionation-considered chronology model, we confirm that the natural isotopic fractionation of Sr during CAI formation have negligible effects on the 87Sr/86Sr ratios of low-Rb/Sr CAIs that have not undergone volatility fractionation (also known as non-group-II CAIs). Correlations of non-radiogenic Sr-Nd isotopic compositions suggest that the nucleosynthetic Sr and Nd isotopic anomalies in CAIs are dominated by the s-process and p-process, and they have negligible effects on 87Sr/86Sr. Finally, most CAIs studied here and previously are consistent with a "representative" Solar System initial 87Sr/86Sr of 0.698979 (+/-) 0.000005. Some CAIs exhibit clear heterogeneity in the initial 87Sr/86Sr, which may originate from nucleosynthetic effects or chemical fractionation in the interstellar medium.
title: Lutherisches Bekenntnis in Stein. Ein Relief des Amberger Bildhauers Georg Schweiger
Creators: name: Kammel, Frank Matthias
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 21 (2009): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Auf dem Gabentisch anno 1844. Der allererste „Struwwelpeter“
Creators: name: Gast, Otto
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 23 (2009): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Increasing Smart Meter Privacy Through Energy Harvesting and Storage Devices
Creators: name: Tan, Onur
name: Gunduz, Deniz
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Smart meters are key elements for the operation of smart grids. By providing near realtime information on the energy consumption of individual users, smart meters increase the efficiency in generation, distribution and storage of energy in a smart grid. The ability of the utility provider to track users energy consumption inevitably leads to important threats to privacy. In this paper, privacy in a smart metering system is studied from an information theoretic perspective in the presence of energy harvesting and storage units. It is shown that energy harvesting provides increased privacy by diversifying the energy source, while a storage device can be used to increase both the energy efficiency and the privacy of the user. For given input load and energy harvesting rates, it is shown that there exists a trade-off between the information leakage rate, which is used to measure the privacy of the user, and the wasted energy rate, which is a measure of the energy-efficiency. The impact of the energy harvesting rate and the size of the storage device on this trade-off is also studied.
description: 11 pages, 8 figures, to appear in the IEEE JSAC Smart Grid Series
Transparency in science-policy; Data Management at IPBES
Creators: name: Niamir, Aidin
Publisher: name: Zenodo
Year: 2022

description: Transparency in science-policy; Data Management at IPBES Presented at Science Summit at the United Nations General Assembly (UNGA77) Biodiversity Plenary: Convened by LifeWatch ERIC/ GBIF https://ssunga77.sched.com/event/16IRE/ref-16032-hybrid-biodiversity-plenary-convened-by-lifewatch-eric-global-biodiversity-information-facility-gbif
title: „Ein toller Ke(e)rl“. Zu zwei neu erworbenen Tellern von Theodor Keerl (1862 – 1939)
Creators: name: Glaser, Silvia
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 35 (2012): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Ein englisches Alabasterrelief. Von Irrungen, Wirrungen und dem Wandel in Weitsicht
Creators: name: Kammel, Frank Matthias
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 39 (2013): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Cadmium isotope fractionation in an intertidal soil induced by tidal pumping
Creators: name: Kersten, Michael
name: Bigalke, Moritz
name: Sieber, Matthias
name: Wiggenhauser, Matthias
Publisher: name: Elsevier
Year: 2022

description: Estuarine floodplain soils are both sinks and potential sources of toxic trace metals such as Cd. Mobilization of Cd has been identified through spatiotemporal monitoring in intertidal sediments during the last decades, but no information was yet available as to what extent these biogeochemical dynamics change the Cd isotopic composition. Cores of an Aquic Udifluvent soil from an intertidal mudflat of the Elbe River, Germany, were sub-sampled at 2 cm intervals to a depth of 40 cm corresponding to a sedimentation of about 10 years. Strong redox zonation was found in the cores, with an upper suboxic zone and a lower anoxic zone of significantly different Cd isotopy. Cadmium partitioning and pore water data determined in 1985 and 1988 using a sequential extraction procedure were reassessed to explain the variations in the δ114Cd values determined in this study. The redox conditions in the mudflat soil were found to change from suboxic (Eh 300 mV) to anoxic (Eh –100 mV) at 20 cm. This was caused by semi-diurnal flooding with oxygenated river water (tidal pumping). The δ114Cd values varied systematically with depth and were correlated with the redox profile. The intense tidal water flow caused lighter Cd isotopes to desorb more readily from the parent soil in the upper suboxic zone and to subsequently redepositing in the deeper anoxic (sulfidic) zone, where the lighter Cd mobilized from Fe/Mn oxyhydroxides was found to be scavenged in sulfidic form. Tidal advection of dissolved lighter Cd down to the anoxic zone and sulfidic reprecipitation led to a decrease in δ114Cd value of up to -0.2‰ with signals of ±0.1‰ even on a seasonal timescale. It became clear that apportioning sources using Cd isotopes would be difficult given the sensitivity of the isotope record to such early-diagenetic isotope fractionation reactions.
Entanglement and Particle Identity: A Unifying Approach
Creators: name: Balachandran, A. P.
name: Govindarajan, T. R.
name: de Queiroz, Amilcar R.
name: Reyes-Lega, A. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has been known for some years that entanglement entropy obtained from partial trace does not provide the correct entanglement measure when applied to systems of identical particles. Several criteria have been proposed that have the drawback of being different according to whether one is dealing with fermions, bosons or distinguishable particles. In this Letter, we give a precise and mathematically natural answer to this problem. Our approach is based on the use of the more general idea of restriction of states to subalgebras. It leads to a novel approach to entanglement, suitable to be used in general quantum systems and specially in systems of identical particles. This settles some recent controversy regarding entanglement for identical particles. The prospects for applications of our criteria are wide-ranging, from spin chains in condensed matter to entropy of black holes.
description: Published version. Based on arxiv 1205.2882
Discriminating Higgs production mechanisms using jet energy profiles
Creators: name: Rentala, Vikram
name: Vignaroli, Natascia
name: Li, Hsiang-nan
name: Li, Zhao
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a new tool for precision measurements of the Higgs boson production mechanisms at the LHC. We study events with a Higgs boson produced with two forward jets. Even with fairly stringent cuts, one expects a significant contamination of gluon fusion (GF) in addition to vector-boson fusion (VBF) in the event sample. By measuring the jet energy profile of the most central jet, we find that SM production can be distinguished from either pure VBF or pure GF at the $5σ$ level with 100 fb$^{-1}$ of luminosity at the 14 TeV LHC. Moreover, this discrimination technique can be used to validate or rule out new physics models that predict similar observable branching fractions as the 125 GeV SM Higgs but have different production mechanisms.
description: 12 pages, 8 figures
Coupling and relaxed commutant lifting
Creators: name: Frazho, A. E.
name: ter Horst, S.
name: Kaashoek, M. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A20, 47A57, 47A48

description: A Redheffer type description of the set of all contractive solutions to the relaxed commutant lifting problem is given. The description involves a set of Schur class functions which is obtained by combining the method of isometric coupling with results on isometric realizations. For a number of special cases, including the case of the classical commutant lifting theorem, the description yields a proper parameterization of the set of all contractive solutions, but examples show that, in general, the Schur class function determining the contractive lifting does not have to be unique. Also some sufficient conditions are given guaranteeing that the corresponding relaxed commutant lifting problem has only one solution.
description: Integral Equations Operator Theory 54 (2006), 33--67
"A Piece of Cake" By Gerard Brophy
Creators: name: Schaupp, Karin
Publisher: name: Griffith University
Year: 2023
Subjects: subject: 190407 Music Performance
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: Commission, workshopping and direction of the Riverside Guitar Ensemble's world premiere performance of A PIece of Cake by distinguished Australian composer Gerard Brophy at Adelaide Guitar Festival. This work is a significant new addition to the very small existing body of repertoire for guitar ensemble, and its performances both in Brisbane and Adelaide were enjoyed by large and appreciative audiences.
Georg Waitz (1813-1886)
Creators: name: Frensdorff, Ferdinand
Publisher: name: [Verlag nicht ermittelbar]
Year: 1896
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Waitz, Georg
subject: Flensburg
subject: Berlin

description: Sonderdruck aus: Allgemeine Deutsche Biographie, Bande 40 (1896)
Orbit Closures in the Witt Algebra and its Dual Space
Creators: name: Mygind, Martin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Working over an algebraically closed field of characteristic p > 3, we calculate the orbit closures in the Witt algebra W under the action of its automorphism group G. We also outline how the same techniques can be used to determine closures of orbits of all heights except p-1 (in which case we only obtain a conditional statement) in the dual space W^* under the induced action of G. As a corollary we prove that the algebra of invariants k[W^*]^G is trivial.
Electromagnetic energy within single-resonance chiral metamaterial spheres
Creators: name: Arruda, Tiago J.
name: Pinheiro, Felipe A.
name: Martinez, Alexandre S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We derive an exact expression for the time-averaged electromagnetic energy inside a chiral dispersive sphere irradiated by a plane wave. The dispersion relations correspond to a chiral metamaterial consisting of uncoupled single-resonance helical resonators. Using a field decomposition scheme and a general expression for the electromagnetic energy density in bi-anisotropic media, we calculate the Lorenz-Mie solution for the internal fields in a medium that is simultaneously magnetic and chiral. We also obtain an explicit analytical relation between the internal electromagnetic field and the absorption cross-section. This result is applied to demonstrate that strong chirality leads to an off-resonance field enhancement within weakly absorb.ing spheres.
description: 9 pages and 4 figures
Interplay of Dirac fermions and heavy quasiparticles in solids
Creators: name: Höppner, M.
name: Seiro, S.
name: Chikina, A.
name: Fedorov, A.
name: Güttler, M.
name: Danzenbächer, S.
name: Generalov, A.
name: Kummer, K.
name: Molodtsov, S. L.
name: Kucherenko, Yu.
name: Geibel, C.
name: Strocov, V.
name: Shi, M.
name: Radovic, M.
name: Schmitt, T.
name: Laubschat, C.
name: Vyalikh, D. V.
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: Many-body interactions in crystalline solids can be conveniently described in terms of quasiparticles with strongly renormalized masses as compared to those of non-interacting particles. Examples of extreme mass renormalization are on the one hand graphene, where the charge carriers obey the linear dispersion relation of massless Dirac fermions, and on the other hand heavy-fermion materials where the effective electron mass approaches the mass of a proton. Here we show that both extremes, Dirac fermions like they are found in graphene and extremely-heavy quasiparticles characteristic for Kondo materials, may not only coexist in a solid but can undergo strong mutual interactions. Using the example of EuRh2Si2 we explicitly demonstrate that these interactions can take place at the surface and in the bulk. The presence of the linear dispersion is imposed solely by the crystal symmetry while the existence of heavy quasiparticles is caused by the localized nature of the 4f states.
description: 4 pages, 4 figures
Neutrino Mass Matrix Textures: A Data-driven Approach
Creators: name: Bertuzzo, E.
name: Machado, P. A. N.
name: Funchal, R. Zukanovich
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the neutrino mass matrix entries and their correlations in a probabilistic fashion, constructing probability distribution functions using the latest results from neutrino oscillation fits. Two cases are considered: the standard three neutrino scenario as well as the inclusion of a new sterile neutrino that potentially explains the reactor and gallium anomalies. We discuss the current limits and future perspectives on the mass matrix elements that can be useful for model building.
description: 25 pages, 18 figures
title: Andreas Heege in Zusammenarbeit mit Eva Roth Heege: Einbeck im Mittelalter. Eine archäologisch-historische Spurensuche. (Studien zur Einbecker Geschichte Band 17). Oldenburg: Isensee 2002
Creators: name: Falk, Alfred
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Andreas Heege in Zusammenarbeit mit Eva Roth Heege: Einbeck im Mittelalter. Eine archäologisch-historische Spurensuche. Mit Beiträgen von Karl-Ernst Behre, Suzanne Frey-Kupper, Silke Grefen-Peters, Peter Steppuhn, Stefan Teuber, Klaus Tidor, Serge und Marquita Volken, Julian Wiethold. (Studien zur Einbecker Geschichte Band 17) Oldenburg: Isensee 2002. 336 S. ISBN 3-89598-836-7
Quantization of Black Holes entropy and its cosmological consequences
Creators: name: Cristofano, Gerardo
name: Maiella, Giuseppe
name: Stornaiolo, Cosimo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting from a quantization relation for primordial extremal black holes with electric and magnetic charges, it is shown that their entropy is quantized. Furthermore the energy levels spacing for such black holes is derived as a function of the level number $n$, appearing in the quantization relation. Some interesting cosmological consequences are presented for small values of $n$. By producing a mismatch between the mass and the charge the black hole temperature is derived and its behavior investigated. Finally extending the quantum relation to Schwarzschild black holes their temperature is found to be in agreement with the Hawking temperature and a simple interpretation of the microscopic degrees of freedom of the black holes is given.
description: 11 pages, accepted for publication on Modern Physics Letters A
title: Edgar Ring (Hrsg.): Glaskultur in Niedersachsen. Tafelgeschirr und Haushaltsglas vom Mittelalter bis zur frühen Neuzeit (Archäologie und Bauforschung in Lüneburg 5). Husum 2003
Creators: name: Frommer, Sören
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Edgar Ring (Hrsg.): Glaskultur in Niedersachsen. Tafelgeschirr und
Haushaltsglas vom Mittelalter bis zur frühen Neuzeit (Archäologie und Bauforschung in Lüneburg 5). Husum 2003.
Multiple accretion events as a trigger for Sgr A* activity
Creators: name: Czerny, Bozena
name: Kunneriath, Devaky
name: Karas, Vladimir
name: Das, Tapas K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gas clouds are present in the Galactic centre, where they orbit around the supermassive black hole. Collisions between these clumps reduce their angular momentum, and as a result some of the clumps are set on a plunging trajectory. Constraints can be imposed on the nature of past accretion events based on the currently observed X-ray reflection from the molecular clouds. We discuss accretion of clouds in the context of enhanced activity of Sgr A* during the past few hundred years. We put forward a scenario according to which gas clouds bring material close to the horizon of the black hole on
description: Astronomy and Astrophysics accepted
title: Berichte über die Ausgrabungen in Haithabu, 34. Das archäologische Fundmaterial VII. Neumünster: Wachholtz 2002
Creators: name: Falk, Alfred
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Berichte über die Ausgrabungen in Haithabu, 34. Das archäologische Fundmaterial VII. Mit Beiträgen von Hajo Vierck †, Miriam Kovetgaard Zeitzen, Barbara Regine Armbruster und Kurt Schietzel. Neumünster: Wachholtz 2002. 214 S. ISBN 3-529-01934-8
title: Neue Tagungen
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: Tagungsankündigung zu: [1] Küche – Kochen – Ernährung (»Bau und Boden II«). Interdisziplinäre Tagung im Germanischen Nationalmuseum Nürnberg, 2. bis 5. Juni 2005 [2] Neue Wege ins alte Hessen. Kongress zur Archäologie des Mittelalters und der Neuzeit. 13. und 14. Oktober 2004 im Landgrafensaal des Hessischen Staatsarchivs in Marburg
Parton Distributions with the Combined HERA Charm Production Cross Sections
Creators: name: Bertone, Valerio
name: Rojo, Juan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Heavy quark structure functions from HERA provide a direct handle on the medium and small-x gluon PDF. In this contribution, we discuss ongoing progress on the implementation of the FONLL General-Mass scheme with running heavy quark masses, and of its benchmarking with the HOPPET and OpenQCDrad codes, and then present the impact of the recently released combined HERA charm production cross sections in the NNPDF2.3 analysis. We find that the combined charm data contribute to constraining the gluon and quarks at small values of Bjorken-x.
description: 4 pages, 2 figures, 2 tables, contribution to the proceedings of the DIFFRACTION 2012 Workshop, Sep 10-15, Puerto del Carmen, Spain
title: Primary apocrine carcinoma of the axilla: a rare tumor
Creators: name: Bento e Silva, Maria João
Publisher: name: EURORAD
Year: 2023
Subjects: subject: Breast imaging
subject: Breast
subject: Musculoskeletal soft tissue
subject: Soft tissues / Skin
subject: Thorax
subject: CT
subject: Ultrasound
subject: Biopsy
subject: Clinical Cases

description: Clinical History: A 50‐year‐old male patient was referred for evaluation of a right axillary mass with five months of evolution, which recently presented with rapid growth and pain. On physical examination, an indurated, tender, subcutaneous mass was palpated. No other lesions were observed in the contralateral axilla or either breast.

description: 50 years, male
GWitchHunters Updates and results on Virgo data
Creators: name: Razzano, Massimiliano
name: Fidecaro, Francesco
name: Di Renzo, Francesco
name: Hemming, Gary
name: Katsanevas, Stavros
Publisher: name: Zenodo
Year: 2022

description: Presentation given at the REINFORCE Large Research Infrastructures Citizen Science event workshop of the 1st and 2nd of September, 2022.
A Fast Semidefinite Approach to Solving Binary Quadratic Problems
Creators: name: Wang, Peng
name: Shen, Chunhua
name: Hengel, Anton van den
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many computer vision problems can be formulated as binary quadratic programs (BQPs). Two classic relaxation methods are widely used for solving BQPs, namely, spectral methods and semidefinite programming (SDP), each with their own advantages and disadvantages. Spectral relaxation is simple and easy to implement, but its bound is loose. Semidefinite relaxation has a tighter bound, but its computational complexity is high for large scale problems. We present a new SDP formulation for BQPs, with two desirable properties. First, it has a similar relaxation bound to conventional SDP formulations. Second, compared with conventional SDP methods, the new SDP formulation leads to a significantly more efficient and scalable dual optimization approach, which has the same degree of complexity as spectral methods. Extensive experiments on various applications including clustering, image segmentation, co-segmentation and registration demonstrate the usefulness of our SDP formulation for solving large-scale BQPs.
description: Appearing in Proc. IEEE Conf. Computer Vision and Pattern Recognition, 2013
Exclusion of Cosmic Rays in Protoplanetary Disks: Stellar and Magnetic Effects
Creators: name: Cleeves, L. Ilsedore
name: Adams, Fred C.
name: Bergin, Edwin A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) Cosmic rays (CRs) are thought to provide an important source of ionization in the outermost and densest regions of protoplanetary disks; however, it is unknown to what degree they are physically present. As is observed in the Solar System, stellar winds can inhibit the propagation of cosmic rays within the circumstellar environment and subsequently into the disk. In this work, we explore the hitherto neglected effects of cosmic ray modulation by both stellar winds and magnetic field structures and study how these processes act to reduce disk ionization rates. We construct a two-dimensional protoplanetary disk model of a T-Tauri star system, focusing on ionization from stellar and interstellar FUV, stellar X-ray photons, and cosmic rays. We show that stellar winds can power a Heliosphere-like analogue, i.e., a "T-Tauriosphere," diminishing cosmic ray ionization rates by several orders of magnitude at low to moderate CR energies (E_CR<1 GeV). We explore models of both the observed solar wind cosmic ray modulation and a highly simplified estimate for "elevated" cosmic ray modulation as would be expected from a young T-Tauri star. In the former (solar analogue) case, we estimate the ionization rate from galactic cosmic rays to be zeta_CR~(0.23-1.4) x 1e-18 s^-1. This range of values, which we consider to be the maximum CR ionization rate for the disk, is more than an order of magnitude lower than what is generally assumed in current models for disk chemistry and physics. In the latter case, i.e., for a "T-Tauriosphere," the ionization rate by cosmic rays is zeta_CR<1e-20 s^-1, which is 1000 times smaller than the interstellar value. Indeed, if winds are as efficient at cosmic ray modulation as predicted here, short-lived radionuclides (now extinct) would have provided the major source of ionization (zeta_RN~7.3e-19 s^-1) in the planet-forming zone of the young Solar Nebula.
description: 22 pages, 14 figures; accepted for publication by ApJ
Friction force microscopy: a simple technique for identifying graphene on rough substrates and mapping the orientation of graphene grains on copper
Creators: name: Marsden, Alexander J.
name: Phillips, Mick
name: Wilson, Neil R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: At a single atom thick, it is challenging to distinguish graphene from its substrate using conventional techniques. In this paper we show that friction force microscopy (FFM) is a simple and quick technique for identifying graphene on a range of samples, from growth substrates to rough insulators. We show that FFM is particularly effective for characterising graphene grown on copper where it can correlate the graphene growth to the three-dimensional surface topography and map the crystallographic orientation of the graphene nondestructively, reproducibly and at high resolution. We expect FFM to be similarly effective for studying graphene growth on other metal/locally crystalline substrates, including SiC, and for studying growth of other two-dimensional materials such as molybdenum disulphide and hexagonal boron nitride.
Tachyon Warm-Logamediate Inflationary Universe Model in High Dissipative Regime
Creators: name: Setare, M. R.
name: Kamali, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present work, we study warm tachyon inflation model in the context of "logamediate inflation" where the cosmological scale factor expands as $a=a_0\exp(A[\ln t]^λ)$. The characteristics of this model in slow-roll approximation are presented in two cases: 1- Dissipative parameter $Γ$ is a function of tachyon field $ϕ$. 2- $Γ$ is a constant parameter. The level of non-Gaussianity of this model is found for these two cases. Scalar and tensor perturbations for this scenario are presented. The parameters appearing in our model are constrained by recent observational data (WMAP7). Harrison-Zeldovich spectrum, i.e. $n_s=1,$ is approximately obtained for large values of $λ$ (i.e. $λ\simeq 50$)and normal value of number of e-folds, i.e. $N\simeq 60$. On the other hand, the scale invariant spectrum (Harrison-Zeldovich spectrum) is given by using two parameters in our model. For intermediate inflation, where the cosmological scale factor expands as $a=a_0\exp(A t^{f}),$ this spectrum has been exactly obtained using one parameter, i.e. $f=2/3$ \cite{2-n}.
description: 17 pages, 5 figures. arXiv admin note: substantial text overlap with arXiv:1210.0742
title: Clay and basic understanding of burial diagenesis
Creators: name: Vaznytė ,  Jūratė
name: Molenaar ,  Nicolaas
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Clay cements can occur pervasively throughout larger volumes of sandstone, thereby affecting the reservoir properties significantly. They affect irreducible water content and pore surface roughness. Moreover, any induced fluid or heat flow, as a consequence of hydrocarbon and geothermal production or CO2 sequestration, may have unwanted effects because of the clay minerals present. The effects will be dependent on the mineralogy, texture and distribution of the clay minerals. Clay minerals replacing detrital components (feldspars and rock fragments) have limited effect because of their dispersed and isolated occurrence. In this study diagenesis of intragranular clay in siliciclastic sandstones is evaluated, using Rotliegend deposits in the Southern Permian Basin and Lower Triassic Buntsandstein deposits as examples. This study clearly shows that large-scale fluid flow does not play a significant role and that much of the mass involved in diagenesis is retained more or less in situ. In the sandstone proper, clay occurs in various ways: as detrital laminae and beds, as patches related to burrows, and as grain coatings through clay infiltration. In addition, clay occurs as cements rimming grains and replacing detrital feldspars and rock fragments. The apparent detrital clay is partly or largely modified during burial diagenesis and much of the clay is authigenic. Not only the mineralogy is changed but also the location and distribution of the authigenic clays. In conclusion: authigenic clays in reservoir sandstones, including clay rim cement, are genetically associated with and directly linked to infiltrated or bioturbated clay.