cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Leading logarithmic large-x resummation of off-diagonal splitting functions and coefficient functions
Creators: name: Vogt, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the iterative structure of unfactorized partonic structure functions in the large-x limit, and derive all-order expressions for the leading-logarithmic off-diagonal splitting functions P_gq and P_qg and the corresponding coefficient functions C_phi,q and C_2,g in Higgs- and gauge-boson exchange deep-inelastic scattering. The splitting functions are given in terms of a new function not encountered in perturbative QCD so far, and vanish maximally in the supersymmetric limit C_A - C_F to 0. The coefficient functions do not vanish in this limit, and are given by simple expressions in terms of the above new function and the well-known leading-logarithmic threshold exponential. Our results also apply to the evolution of fragmentation functions and semi-inclusive e^+ e^- annihilation.
description: 9 pages, LaTeX, 1 eps-figure
Turkey in European Identity Politics: Key Drivers and Future Scenarios
Creators: name: Lindgaard, Jakob
name: Uyğur Wessel, Ayça
name: Stokholm Banke, Cecilie Felicia
Publisher: name: Zenodo
Year: 2018
Subjects: European Union; Turkey; EU-Turkey relations; Identity; Representation; Identity Politics; Conflictual Cooperation

description: FEUTURE Online Paper No. 19

This paper presents a trends survey of identity-related primarily European representations of Turkey (but also vice versa) in the 1999-2017 timeframe with a view to identifying the most salient, pertinent, and durable drivers likely to obtain and drive the relations between Turkey and the EU into 2023. It identifies four key drivers underpinning European representations of Turkey, three drivers underpinning Turkish representations of Europe and one shared driver that collectively reveal the underlying dynamics of identity-related representations of each other, a both pivotal and often controversial aspect of EU-Turkey relations. In conclusion, the paper unfolds the nature of the likely scenario of a ‘conflictual orientation’ in 2023, and adds some initial recommendations for decision makers and stakeholders to address this often both sensitive and elusive aspect of EU-Turkey relations.
description: This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 692976. This publication reflects the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
Equation of state based on the first principles
Creators: name: Chefranov, Sergey G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: An alternative to the well-known complete form of the Mie-Grüneisen equation of state (EOS) for water is suggested. A closed analytical description of the self-consistent EOS for an arbitrary medium based only on the first law of thermodynamics and on a new form of virial theorem is obtained. This form of the virial theorem (allowing a variable power-law exponent of the particles interaction potential) is a result of the generalization of the known method of similarity (Feynman et al., 1949). In the new EOS, the description of the internal potential energy as a solution of a nonlinear Riemann-Hopf type equation is proposed.
description: 37 pages, 5 figures
Illuminating spindle convex bodies and minimizing the volume of spherical sets of constant width
Creators: name: Bezdek, Karoly
Publisher: name: arXiv
Year: 2011
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52A40, 52A38, 52A55, 52C99

description: A subset of the d-dimensional Euclidean space having nonempty interior is called a spindle convex body if it is the intersection of (finitely or infinitely many) congruent d-dimensional closed balls. The spindle convex body is called a "fat" one, if it contains the centers of its generating balls. The core part of this paper is an extension of Schramm's theorem and its proof on illuminating convex bodies of constant width to the family of "fat" spindle convex bodies.
description: 17 pages
Indikation und Grenzen ambulanter Verhaltenstherapie bei chronischen Schmerzzuständen
Creators: name: Jungnitsch, Georg
name: Köhler, Helmut
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: Chronischer Schmerz; Kognitiv-behaviorale Schmerztherapie; Verhaltenstherapie bei Schmerz; Schmerzbewältigungstraining; Psychologische Schmerztherapie
subject: 150 Psychologie

description: Bei Patienten mit chronischen Schmerzen ist aufgrund der Betrachtungsweise dieser Erkrankung als multifaktorielles Geschehen in der Behandlung eine interdisziplinäre Vorgehensweise zu fordern. Von psychologischer Seite wird dabei ein kognitiv-behavioraler Behandlungsansatz favorisiert, da in dessen Rahmen sowohl ein als Regelbehandlung gedachtes Schmerzbewältigungstraining angeboten werden kann, gleichermaßen aber auch eine umfassende psychotherapeutische Behandlung möglich ist. Diese Behandlungsform erscheint unter den vielfältigsten Bedingungen angezeigt. Eine wesentliche Einschränkung der Indikation von seiten des Patienten besteht dann, wenn dieser festgefügte Vorstellungen bezüglich einer anderen psychotherapeutischen Behandlung hat. Vom Behandler ist zu fordern, daß er einen über eine ausschließliche Psychotherapie hinausgehenden Ansatz einer interdisziplinären Behandlung akzeptiert.
Effect of the ABCB1 modulators elacridar and tariquidar on the distribution of paclitaxel in nude mice.
Creators: name: Hubensack, Martina
name: Müller, Christine
name: Höcherl, Höcherl
name: Fellner, Stephan
name: Spruss, Thilo
name: Bernhardt, Günther
name: Buschauer, Armin
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: PURPOSE: Previously, we studied the effect of co-administration of paclitaxel with the second generation ABCB1 (p-gp) modulator valspodar on the intracerebral growth of human U118-MG glioblastoma in nude mice. Valspodar significantly increased the brain levels of paclitaxel by inhibition of p-gp expressed at the blood brain barrier. Thus, the tumour burden was reduced by 90%, which was considered as a proof of concept. However, the paclitaxel dose had to be reduced because of toxic side effects resulting from increased drug levels due to p-gp modulation in peripheral tissues. Therefore, in the present study we examined the co-application of paclitaxel with the third generation ABCB1 modulators elacridar and tariquidar, which were supposed to preferentially modulate p-gp in brain capillaries. METHODS: The inhibitory activity of the modulators was measured by a flow cytometric and a chemosensitivity assay in vitro. To determine the distribution of paclitaxel in vivo, nude mice received 50 mg/kg of valspodar, elacridar or tariquidar p.o. (control: vehicle) 4 h before i.v. injection of 8 mg/kg of paclitaxel. Brain, liver, kidney and plasma were collected and analyzed by RP-HPLC. RESULTS: Our in vitro experiments demonstrate that the new modulators are about 80 times more effective in comparison to valspodar. Co-administration of paclitaxel with elacridar and tariquidar led to a long lasting fivefold increase in the concentration of the cytostatic in the brain. Although the increase (2.5- to 7-fold) tended to be lower compared to that induced by co-administered valspodar (six- to eightfold), the brain/plasma ratios achieved with the new modulators were 2-15 times higher. CONCLUSIONS: Elacridar and tariquidar seem to modulate p-glycoprotein preferentially at the blood-brain barrier. Our results suggest that the systemic toxicity of cytostatics combined with elacridar or tariquidar should be lower than in combination with valspodar.
Linear Beamforming for the Spatially Correlated MISO broadcast channel
Creators: name: Raghavan, Vasanthan
name: Veeravalli, Venu
name: Hanly, Stephen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A spatially correlated broadcast setting with M antennas at the base station and M users (each with a single antenna) is considered. We assume that the users have perfect channel information about their links and the base station has only statistical information about each user's link. The base station employs a linear beamforming strategy with one spatial eigen-mode allocated to each user. The goal of this work is to understand the structure of the beamforming vectors that maximize the ergodic sum-rate achieved by treating interference as noise. In the M = 2 case, we first fix the beamforming vectors and compute the ergodic sum-rate in closed-form as a function of the channel statistics. We then show that the optimal beamforming vectors are the dominant generalized eigenvectors of the covariance matrices of the two links. It is difficult to obtain intuition on the structure of the optimal beamforming vectors for M > 2 due to the complicated nature of the sum-rate expression. Nevertheless, in the case of asymptotic M, we show that the optimal beamforming vectors have to satisfy a set of fixed-point equations.
description: Published in IEEE ISIT 2010, 5 pages
Hot-electron transport and magnetic anisotropy in epitaxial spin valves
Creators: name: Heindl, Emanuel
name: Vancea, Johann
name: Woltersdorf, Georg
name: Back, Christian
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: We report on ballistic electron magnetic microscopy studies at room temperature using an epitaxially grown Fe$_{34}$Co$_{66}$/Au/Fe$_{34}$Co$_{66}$ trilayer. Local hysteresis loops are obtained as a function of the in-plane magnetic field angle. In order to understand the underlying local magnetization behavior, the magnetic anisotropies were determined by ferromagnetic resonance. These results served as input for simulations of the hysteresis loops, which are compared to magneto-optic Kerr effect and ballistic electron magnetic microscopy data of the spin valve. In doing so, the relative magnetization configuration of the spin valve can be calculated as a function of the external magnetic field, and the magnetization behavior during the reversal can be explained. Since different magnetization configurations of the spin valve are available, epitaxial spin valves allow multimagnetocurrent values, when the magnetic field is applied along different directions.
Sustainability and Reusing Buildings for Libraries: A Review of Selected Documents
Creators: name: Kuunifaa, Cletus D.
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Library buildings – Design and construction
subject: Buildings – Remodelling for other use
subject: Sustainability
subject: Green libraries
subject: 020 Bibliotheks- und Informationswissenschaften

description: The reuse of old buildings for new libraries has gained currency within the Library and Information Science (LIS) profession and has informed sustainability initiatives. Adaptive reuse benefits the environment by conserving natural resources and minimizing the need for new materials. This chapter provides a review of some key documents on sustainability, green libraries and the recycling and conversion of buildings as libraries. Building reuse provides an opportunity for sustainable thinking in library planning. Sustainability and going green are already evident in library architecture and design and there is a need to encourage embracing greener practices and adaptive reuse. Sustainability and going green are growth areas for the future. Adaptive reuse and repurposing buildings that have outlived their original purposes for different uses or functions while at the same time retaining their historic features are viable alternatives to new buildings. Building reuse is occurring in developed countries while some developing countries are saddled with challenges slowing adoption of the trend.
title: The Human Brain Project – Chances and Challenges for Cognitive Systems
Creators: name: Weyers, Benjamin
name: Nowke, Christian
name: Hänel, Claudia
name: Zielasko, Daniel
name: Hentschel, Bernd
name: Kuhlen, Torsten
Publisher: name: DuEPublico: Duisburg-Essen Publications Online, University of Duisburg-Essen, Germany
Year: 2015

description: The Human Brain Project is one of the largest scientific initiatives dedicated to the research of the human brain worldwide. Over 80 research groups from a broad variety of scientific areas, such as neuroscience, simulation science, high performance computing, robotics, and visualization work together in this European research initiative. This work at hand will identify certain chances and challenges for cognitive systems engineering resulting from the HBP research activities. Beside the main goal of the HBP gathering deeper insights into the structure and function of the human brain, cognitive system research can directly benefit from the creation of cognitive architectures, the simulation of neural networks, and the application of these in context of (neuro-)robotics. Nevertheless, challenges arise regarding the utilization and transformation of these research results for cognitive systems, which will be discussed in this paper. Tools necessary to cope with these challenges are visualization techniques helping to understand and gain insights into complex data. Therefore, this paper presents a set of visualization techniques developed at the Virtual Reality Group at the RWTH Aachen University.
Deviation to the Tri-Bi-Maximal flavor pattern and equivalent classes
Creators: name: Barradas-Guevara, E.
name: Félix-Beltrán, O.
name: Gonzalez-Canales, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the model-independent context, where the neutrino mass matrix is assumed to be diagonalized by means of a unitary matrix that possess the Tri-Bi-Maximal (TBM) flavor mixing pattern. We present an analysis where the TBM deviation is explored by considering different forms, with texture zeros, for the charged lepton mass matrix. These last mass matrices are classified into equivalent classes. We are interested in the charged lepton mass matrices with the minimum free parameter number, $i.e.$ the maximum number of texture zeros, that allows us to correctly reproduce the reactor mixing angle value. We show a deviation from the TBM pattern in terms of the charged lepton masses as well as the theoretical expressions and their parameter space for the mixing angles. Finally, we present the phenomenological implications of numerical values of the "Majorana-like" phase factors on the neutrinoless double-beta decay.
description: 25 pages, 11 figures
Haag's theorem in S O (1, k) invariant quantum field theory
Creators: name: Antipin, K. V.
name: Vernov, Yu. S.
name: Mnatsakanova, M. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T05

description: Generalized Haag's theorem has been proved in S O (1, k) invariant quantum field theory. Apart from the above mentioned k+1 variables there can be arbitrary number of additional coordinates including noncommutative ones in the theory. New consequences of generalized Haag's theorem are obtained. It has been proved that the equality of four-point Wightman functions in two theories leads to the equality of elastic scattering amplitudes and thus the total cross-sections in these theories. In space-space noncommutative quantum field theory in four-dimensional case it has been proved that if in one of the theories under consideration S-matrix is equal to unity, then in another theory S-matrix is unity as well.
description: 5 pages, based on the talk given at the XVIth International Seminar on High Energy Physics QUARKS'2010, Kolomna, Russia, 6-12 June, 2010 and the XIXth International Workshop on High Energy Physics and Quantum Field Theory, Golitsyno, Moscow, Russia, 8-15 September 2010
title: Spatio-Temporal Dynamics of Algae and Macrophyte Cover in Urban Lakes: A Remote Sensing Analysis of Bellandur and Varthur Wetlands in Bengaluru, India
Creators: name: Bareuther, Mischa
name: Klinge, Michael
name: Bürkert, Andreas
Publisher: name: Universität Kassel
Year: 2020
Subjects: subject: ecosystem service
subject: Google Earth images
subject: lake eutrophication
subject: lake surface cover
subject: supervised classification
subject: urban wetlands
subject: waste water discharge
subject: 550
subject: 710
subject: Indien
subject: Ökosystemdienstleistung
subject: Google Earth
subject: Eutrophierung
subject: See
subject: Wasseroberfläche
subject: Verstädterung
subject: Feuchtgebiet
subject: Abwassereinleitung

description: Gefördert durch den Publikationsfonds der Universität Kassel
Heat transfer during run-out table bottom jet cooling of steel
Creators: name: Kashyap, Debanga
Publisher: name: University of British Columbia
Year: 2018

description: Accelerated cooling on a run-out table in a hot mill governs the final microstructure and mechanical properties of thermo-mechanically controlled processed (TMCP) steels. Thus, it is crucial to delineate the heat transfer mechanisms and develop models adept to predict the temperature history of a steel strip or plate on a run-out table. In this work, controlled accelerated cooling experiments under transient conditions were performed on stationary steel specimens using an impinging bottom planar jet of water. Spatial sub-surface temperature history was recorded from 700 °C to below the saturation point of water. A two-dimensional inverse heat conduction algorithm was employed to quantify the heat fluxes and surface temperatures in order to obtain representative boiling curves. A range of water flow rates (160-300 l/min), water temperatures (10-40 °C) and jet inclinations (0-20 degrees) were investigated to examine the influence of process parameters on heat extraction rates. The obtained boiling curves show the presence of different heat transfer regimes with varying surface temperatures, i.e. nucleate boiling and transition boiling. Heat extraction rates increase with increasing water flow rates and decreasing water temperatures, particularly in the transition boiling region. Heat flux values show a strong dependence with respect to distance from the stagnation line, demarcating an impingement zone and a parallel flow zone. Characteristic boiling curves represent the two zones. A shoulder in the transition boiling region is observed to be an important feature in the boiling curves of the impingement zone. Based on the experimental data, empirical correlations have been proposed for the heat fluxes, considering the amalgamated effect of process parameters and distance from the stagnation line. Boiling curves for transient cooling have been constructed in the impingement zone and the parallel flow zone for a range of cooling temperatures relevant to the production of TMCP steels.
UnAnonym
Creators: name: Smits, Malte
Publisher: name: Zenodo
Year: 2021
Subjects: Anonymisierung
Educational Game
Forschungsdaten
Research Data
Datenschutz
Personenbezogene Daten
Sensible Daten
Forschungsdatenmanagement

description: In diesem digitalen Lernspiel soll mithilfe von Rätseln und spielerischen Aufgaben die Relevanz der Anonymisierung von persönlichen und sensiblen Forschungsdaten vermittelt werden. Mit fiktiven Forschungsdaten wird eine realitätsähnliche Situation dargestellt, damit neben dem Spaß am Rätseln auch Fragen zu dem Umgang mit Daten nicht unbeantwortet bleiben.

 Dieses Spiel kann entweder in einem Workshop für mehrere Gruppen angeleitet oder privat in einer kleinen Gruppe oder allein gespielt werden.
description: An English version of 'UnAnonym' is available under https://zenodo.org/record/5535417
A model explaining the new CDF II W boson mass linking to muon $g-2$ and dark matter
Creators: name: Nagao, Keiko I.
name: Nomura, Takaaki
name: Okada, Hiroshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose a model to explain the W boson mass anomaly reported by the CDFII collaboration that would suggest new physics (NP). We introduce exotic fermions; one isospin doublet vector-like lepton, one isospin singlet singly-charged vector-like lepton, and an isospin doublet inert scalar. The proposed model provides sizable muon anomalous magnetic moment (muon $g-2$) due to no chiral suppression and nonzero mass difference between the real and imaginary parts of neutral inert scalar bosons. The inert scalar mass squared difference and vector-like exotic leptons ($L', E'$ in the main text) affect oblique parameters. Especially, the $T$-parameter shift from zero explains the W boson mass anomaly. We search for the allowed parameter region to explain both muon $g-2$ and W boson mass anomaly at the same time. We also discuss a dark matter (DM) candidate assuming the real part of the inert scalar field to be the one. We find that lighter DM mass is favored to be consistent with experimental constraints.
description: 21 pages, 7 figures
Modelling And Control Of An Air Conditioning System With An Emphasis On Cooling Coil Behaviour
Creators: name: Deng, Shi-Ming
Publisher: name: London South Bank University
Year: 1991

description: A review of the literature on the control of air 
conditioning systems has been undertaken. It shows that 
the behaviour of sensors and the relationship between 
measurements and bulk conditions cause significant 
difficulties. A simple air cooling and dehumidifying 
experimental plant and a non-linear thermodynamic 
mathematical model have been simultaneously developed 
to investigate the control of air coolers with an 
emphasis on the cooling and dehumidifying process. 
The radio frequency interference encountered in using 
the frequency inverter for varying the compressor speed 
presented major problems. It was suppressed by using 
shielding, filtering and common grounding techniques 
with high accuracy. 
The equations describing the behaviour of the DxX 
evaporator in the model are unique. The mathematical 
model has been validated and simplified using classical 
control theory. Transfer functions derived during the 
validation processes were simple mathematical models 
and are separately applicable. The techniques employed 
are shown to be effective methods for model validation. 
Two types of intelligent controller have been derived. 
For situations where the bulk air conditions can be 
measured, a closed loop intelligent controller with a 
combination of simple PID control algorithms’ and 
linguistic rules has been developed. For situations in 
which the air bulk state is difficult to measure, an 
open loop intelligent controller was derived. It 
combined some key parameter measurements in the cooling 
system and a few mathematical statements with some 
linguistic rules. Experiments on the controllers showed 
that both control accuracy and stability were achieved. 
Two new control concepts for variable speed compressor 
systems were investigated with the validated 
mathematical model. Promising results from the model 
simulation showed that research and development would 
be worthwhile.
Complex changes in ecto-nucleoside 5'-triphosphate diphosphohydrolase expression in hypoxanthine phosphoribosyl transferase deficiency
Creators: name: Lorenz, Veronika
name: Pinto, Cibele S.
name: Seifert, Roland
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: Lesch-Nyhan disease; Hypoxanthine phosphoribosyl transferase; Ecto-nucleoside 5′-triphosphate diphosphohydrolase; Fibroblasts; Neuroblastoma cells
subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: Lesch-Nyhan disease is caused by a deficiency of the purine salvage enzyme, hypoxanthine phosphoribosyl transferase (HPRT). The link between HPRT deficiency and the neuropsychiatric symptoms is unknown. In rat B103 neuroblastoma cell membranes and mouse Neuro2a neuroblastoma cell membranes, nucleoside 5'-triphosphatase (NTPase) activity is substantially reduced, whereas in fibroblast membranes from HPRT knock-out mice, NTPase activity is increased. Candidate genes for these NTPase activity changes are ecto-nucleoside 5'-triphosphate diphosphohydrolases (NTPDases). Therefore, we studied expression of NTPDases in B103 cells, Neuro2a cells and skin fibroblasts by reverse transcriptase polymerase chain reaction and restriction enzyme digestion of amplified cDNAfragments. In B103 cells, expression of NTPDases 1, 3 and 6 decreased, whereas expression of NTPDases 4 and 5 increased in HPRT deficiency. In Neuro2a cells, expression of NTPDases 3–6 increased in HPRT deficiency. In fibroblasts, NTPDase 3 expression decreased, and expression of NTPDases 4–6 increased in HPRT deficiency. Collectively, there are complex decreases and increases in NTPDase isoform expression in HPRT deficiency that depend on the specific cell type and species studied. These changes in NTPDase expression may reflect an (insufficient) attempt of cells to compensate for the changes in nucleotide metabolism caused by HPRT deficiency.
Hidden Quantum Memory: Is Memory There When Somebody Looks?
Creators: name: Taranto, Philip
name: Elliott, Thomas J.
name: Milz, Simon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In classical physics, memoryless dynamics and Markovian statistics are one and the same. This is not true for quantum dynamics, first and foremost because quantum measurements are invasive. Going beyond measurement invasiveness, here we derive a novel distinction between classical and quantum processes, namely the possibility of hidden quantum memory. While Markovian statistics of classical processes can always be reproduced by a memoryless dynamical model, our main result shows that this is not true in quantum mechanics: We first provide an example of quantum non-Markovianity whose manifestation depends on whether or not a previous measurement is performed -- an impossible phenomenon for memoryless dynamics; we then strengthen this result by demonstrating statistics that are Markovian independent of how they are probed, but are nonetheless still incompatible with memoryless quantum dynamics. Thus, we establish the existence of Markovian statistics gathered by probing a quantum process that nevertheless fundamentally require memory for their creation.
description: 7 + 9 pages, 5 figures
Quasiparticle Excitations and Charge Transition Levels of Oxygen Vacancies in Hafnia
Creators: name: Jain, Manish
name: Chelikowsky, James R.
name: Louie, Steven G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the quasiparticle defect states and charge transition levels of oxygen vacancies in monoclinic hafnia. The charge transition levels, although they are thermodynamic quantities, can be critically dependent on the band gap owing to localized defect states. These quasiparticle defect level effects are treated using the first principle GW approximation to the self energy. We show that the quality and reliability of the results may be evaluated by calculating the same transition level via two physical paths and that it is important to include the necessary electrostatic corrections in a supercell calculation. Contrary to many previous reports, the oxygen vacancies in monoclinic hafnia are found to be a positive U center, where U is the defect electron addition energy. We identify a physical partitioning of U in terms of an electronic and structural relaxation part.
description: 10 pages, 3 figures
Ferromagnetic phases in spin-Fermion systems
Creators: name: Karchev, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin-Fermion systems which obtain their magnetic properties from a system of localized magnetic moments being coupled to conducting electrons are considered. The dynamical degrees of freedom are spin-$s$ operators of localized spins and spin-1/2 Fermi operators of itinerant electrons. Renormalized spin-wave theory, which accounts for the magnon-magnon interaction, and its extension are developed to describe the two ferrimagnetic phases in the system: low temperature phase $0
description: 9 pages, 5 figures
Laser ultrasonic investigations of recrystallization and grain growth in cubic metals
Creators: name: Keyvani, Mahsa
Publisher: name: University of British Columbia
Year: 2018

description: This study evaluates the applicability of laser ultrasonics for metallurgy (LUMet) as a non-destructive tool in measurement of grain size evolution and quantifying recrystallization in FCC polycrystalline metallic materials. A systematic investigation has been conducted to correlate the ultrasonic attenuation parameter with the effective average grain size determined by metallography in two cobalt-based superalloys and pure copper. To correlate the ultrasonic attenuation parameter with the metallographic grain size, a series of thermo-mechanical treatments were carefully designed to generate samples with different average grain sizes. Equivalent area diameter (EQAD) and area weighted grain diameter (AWGD) including twin boundaries were selected as the measures of average grain size. The developed correlation for cobalt superalloys was used to monitor the recrystallization kinetics of cold-rolled and hot deformed specimens in real time through the refinement of the mean grain size as well as the grain growth kinetics. Furthermore, it was found that when a substantial tail exists in the microstructure, the AWGD-based correlation provides a better estimation of the average grain size than the EQAD-based correlation since the former changes according to the changes in grain size distribution. Moreover, the finite element modelling of wave propagation revealed that twin boundaries have similar scattering behavior as other high-angle grain boundaries. This suggests that the LUMet technique cannot be used to extract the fraction of twins. A versatile method was then introduced to harmonize all the existing empirical equations to evaluate the grain size change in FCC metals. It was observed that the amount of grain scattering is controlled by the single crystal elastic constants which should be known apriori. The harmonized equation can be used to measure the grain size evolution in other metals without the need to develop a new calibration or at least reduces the number of experiments and labor-intensive ex-situ characterizations required for the design of a new calibration.
Semiring identities of finite inverse semigroups
Creators: name: Gusev, Sergey V.
name: Volkov, Mikhail V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16Y60, 20M18, 08B05

description: We study the Finite Basis Problem for finite additively idempotent semirings whose multiplicative reducts are inverse semigroups. In particular, we show that each additively idempotent semiring whose multiplicative reduct is a nontrivial rook monoid admits no finite identity basis, and so do almost all additively idempotent semirings whose multiplicative reducts are combinatorial inverse semigroups.
description: 14 pages, 1 figure
Transferring orbital and spin angular momenta of light to atoms
Creators: name: Picón, Antonio
name: Benseny, Albert
name: Mompart, Jordi
name: de Aldana, Javier R. Vázquez
name: Plaja, Luis
name: Calvo, Gabriel F.
name: Roso, Luis
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Light beams carrying orbital angular momentum, such as Laguerre-Gaussian beams, give rise to the violation of the standard dipolar selection rules during the interaction with matter yielding, in general, an exchange of angular momentum larger than hbar per absorbed photon. By means of ab initio 3D numerical simulations, we investigate in detail the interaction of a hydrogen atom with intense Gaussian and Laguerre-Gaussian light pulses. We analyze the dependence of the angular momentum exchange with the polarization, the orbital angular momentum, and the carrier-envelope phase of light, as well as with the relative position between the atom and the light vortex. In addition, a quantum-trajectory approach based on the de Broglie-Bohm formulation of quantum mechanics is used to gain physical insight into the absorption of angular momentum by the hydrogen atom.
Transforming a Match Factory into the American Philatelic Research Library in Bellefonte, Pennsylvania
Creators: name: Grove, Tara Murray
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Special libraries – United States
subject: Library buildings – Design and construction
subject: Factories – Remodelling for other use
subject: 020 Bibliotheks- und Informationswissenschaften

description: The American Philatelic Research Library, one of the largest libraries in the world specializing in stamp collecting and postal history, opened its new library in 2016. The library attracts researchers from around the world, yet it was constructed in the unlikely location of an abandoned match factory building at the edge of a small town, Bellefonte, in central Pennsylvania, hundreds of miles from a major metropolitan area. Throughout the renovation process and library opening, the library built and strengthened connections with the community of researchers around the world who use its resources, and with the local community. The architect’s design concept for the project was to produce a state-of-theart complement to the historical factory exterior. The new library unites collections which had previously been housed separately and adds functional elements such as a rare book room, exhibition space, work areas with individual reading lights and power outlets, along with accessibility features. The story of how the library found its new home and how it built support for the renovation project by engaging with its own history and the local history of Bellefonte, demonstrates the power of the library as place and can inform future library building projects worldwide.
Asylum Policy and the Future of Turkey-EU Relations: Between Cooperation and Conflict
Creators: name: Kale, Başak
name: Dimitriadi, Angeliki
name: Sanchez-Montijano, Elena
name: Süm, Elif
Publisher: name: Zenodo
Year: 2018
Subjects: European Union; Turkey; EU-Turkey relations; Asylum Policy; Future; Migration; Neighbourhood; Cooperation; Conflict; Catalyser Effect; Transformation; Global; Fieldwork Interviews; Conflictual Cooperation

description: FEUTURE Online Paper No. 18

Migration was a critical policy area for Turkey even before Turkey became an official candidate country to the EU in 1999. Especially, with the end of the Cold War in the 1990s Turkey began to face the challenges of being a country of origin and destination, while acting as a transit country for documented and undocumented migration. Although the foundations of a migration policy were shaped in Turkey prior to the EU accession process, the EU accession process had an important catalyser effect in transforming the migration and asylum policies. This paper presents an overall analysis of the changes experienced in Turkey since 1999 on the asylum field with a projection of three possible scenarios of convergence, cooperation and conflict on Turkey-EU relationship. In that respect, this paper aims to map out the important periods that have influenced the transformation of the asylum policy in Turkey. While locating the important events and drivers at the global, neighbourhood, EU and Turkish levels, this research based on extensive fieldwork interviews presents findings of a EU-Turkey relationship that lies between cooperation and conflict.
description: This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 692976. This publication reflects the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
Voigt waves in homogenized particulate composites based on isotropic dielectric components
Creators: name: Mackay, Tom G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Homogenized composite materials (HCMs) can support a singular form of optical propagation, known as Voigt wave propagation, while their component materials do not. This phenomenon was investigated for biaxial HCMs arising from nondissipative isotropic dielectric component materials. The biaxiality of these HCMs stems from the oriented spheroidal shapes of the particles which make up the component materials. An extended version of the Bruggeman homogenization formalism was used to investigate the influence of component particle orientation, shape and size, as well as volume fraction of the component materials, upon Voigt wave propagation. Our numerical studies revealed that the directions in which Voigt waves propagate is highly sensitive to the orientation of the component particles and to the volume fraction of the component materials, but less sensitive to the shape of the component particles and less sensitive still to the size of the component particles. Furthermore, whether or not such an HCM supports Voigt wave propagation at all is critically dependent upon the size of the component particles and, in certain cases, upon the volume fraction of the component materials.
Pure spin currents induced by spin-dependent scattering processes in SiGe quantum well structures
Creators: name: Ganichev, Sergey
name: Danilov, Sergey
name: Bel'kov, V.
name: Giglberger, Stephan
name: Tarasenko, S.
name: Ivchenko, E.
name: Weiss, Dieter
name: Jantsch, W.
name: Schäffler, F.
name: Gruber, D.
name: Prettl, Wilhelm
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: We show that spin-dependent electron-phonon interaction in the energy relaxation of a two-dimensional electron gas results in equal and oppositely directed currents in the spin-up and spin-down subbands yielding a pure spin current. In our experiments on SiGe heterostructures the pure spin current is converted into an electric current applying a magnetic field that lifts the cancellation of the two partial charge flows. A microscopic theory of this effect, taking account of the asymmetry of the relaxation process, is developed and is in good agreement with the experimental data.
title: Giodano Bruno's 'Degli Eroici Furori' and Elizabethan poets in the context of sixteenth-century Italian Petrarch-commentaries
Creators: name: Clucas, S
Publisher: name: University of Kent
Year: 1987

description: Giordano Bruno spent the years 1583-5 in London, during which time he published three Latin mnemonic treatises and the six Dialoghi Italiani, two of which were dedicated to Sir Philip Sidney : the Spaccio della Bestia Trionfante and the Degli Eroici Furori. The main purpose of this thesis is to evaluate the influence of the latter - a Petrarchan sonnet sequence with Neoplatonic commentaries - on Elizabethan poetry, in particular on the sonnet-cycles of Sidney and Fulke Greville, and the philosophical poetry of George Chapman. In this I am pursuing lines of research suggested by Dr F.A.Yates in her Study of Love's Labour's Lost (1936) and her essay on the Eroici and Elizabethan sonneteers (J.W.C.I, VI, 1943). My immediate aim was to test Yates' hypothesis that the Eroici Furori was the "supreme experience" for the English Petrarchists of the 1580s, and an influential model for their poetic practice. Ultimately I felt it was fairer to look at the Elizabethan sonnet in the wider context of the long and diverse Italian Petrarchan tradition, and to this end I undertook a prefatory historical sketch of the Italian Petrarch-comentary in the sixteenth-century from Pietro Bembo to Lodovico Castelvetro, including annotated editions of the Canzoniere, and less obvious forms of exegesis such as the lezzioni of Academicians and the "corrections" of spiritualizzamenti. In my comparison of the sonnets of Bruno, Sidney and Greville I assess the congruence or disparity of their uses of mutual mythical or Petrarchan topoi, and their relationship to the diverse typology of Neoplatonic love offered by the Petrarch-commentators. to Yates' assertion :hool of Night" or examining the possible and other poems, I Chapman's patron of Bruno texts and In my study of George Chapman I addressed myself that the poets, as well as the scientists, of the "Sc "Northumberland circle" were influenced by Bruno. In influence of the Eroici on Chapman's Shadow of Night have considered the potential role played in this by Henry Percy, Earl of Northumberland, whose collection annotations to the Eroici are also examined.
Density Functional Theory for Electronic Excited States
Creators: name: Herbert, John M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: This chapter provides a basic introduction to excited-state extensions of density functional theory (DFT), including time-dependent (TD-)DFT in both its linear-response and its explicitly time-dependent formulations. As applied to the Kohn-Sham DFT ground state, linear-response theory affords an eigenvalue-type problem for the excitation energies in a basis of singly-excited Slater determinants, and is widely known simply as "TDDFT" despite its frequency-domain formulation. This form of TDDFT is the mostly widely-used quantum-chemical method for excited states, due to a favorable combination of low cost and reasonable accuracy. The chapter surveys the accuracy of linear-response TDDFT, which is generally more sensitive to the details of the exchange-correlation functional as compared to ground-state DFT, and also describes some known systemic problems exhibited by this approach. Some of those problems can be corrected on a case-by-case basis using orbital-optimized, excited-state self-consistent field (SCF) calculations, in what is known as excited-state Kohn-Sham theory or a "Delta-SCF" procedure, a class of methods that includes restricted open-shell Kohn-Sham theory. Recent successes of these approaches are highlighted, including double excitations and core-level excitations. Finally, explicitly time-dependent (or "real-time") TDDFT involves propagation of the molecular orbitals in time following an external perturbation, according to the Kohn-Sham analogue of the time-dependent Schroedinger equation. The time-dependent approach has been used to model strong-field electron dynamics, and in the weak-field limit it provides a route to broadband spectra based on the time evolution of the dipole moment function. This is useful for describing high-energy excitations (as in x-ray spectroscopy) and in systems where the density of states is high, as demonstrated by a few examples.
Resolved Imaging of the HD191089 Debris Disc
Creators: name: Churcher, Laura J.
name: Wyatt, Mark C.
name: Smith, Rachel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Two thirds of the F star members of the 12 Myr old Beta Pictoris Moving Group (BPMG) show significant excess emission in the mid-infrared, several million years after the expected dispersal of the protoplanetary disc. Theoretical models of planet formation suggest that this peak in the mid-infrared emission could be due to the formation of Pluto-sized bodies in the disc, which ignite the collisional cascade and enhance the production of small dust. Here we present resolved mid-infrared imaging of the disc of HD191089 (F5V in the BPMG) and consider its implications for the state of planet formation in this system. HD191089 was observed at 18.3 microns using T-ReCS on Gemini South and the images were compared to models of the disc to constrain the radial distribution of the dust. The emission observed at 18.3 microns is shown to be significantly extended beyond the PSF at a position angle of 80 degrees. This is the first time dust emission has been resolved around HD191089. Modelling indicates that the emission arises from a dust belt from 28-90 AU, inclined at 35 degrees from edge on with very little emission from the inner 28AU of the disc, indicating the presence of an inner cavity. The steep slope of the inner edge is more consistent with truncation by a planet than with ongoing stirring. A tentative brightness asymmetry F(W)/F(E)=0.80+/-0.12 (1.8 sigma) between the two sides of the disc could be evidence for perturbations from a massive body on an eccentric orbit in the system.
description: 11 Pages Accepted to MNRAS
Characterizing Kepler Asteroseismic Targets
Creators: name: Molenda-Zakowicz, Joanna
name: Latham, David W.
name: Catanzaro, Giovanni
name: Frasca, Antonio
name: Quinn, Samuel N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar structure and evolution can be studied in great detail by asteroseismic methods, provided data of high precision are available. We determine the effective temperature (Teff), surface gravity (log g), metallicity, and the projected rotational velocity (v sin i) of 44 Kepler asteroseismic targets using our high-resolution (R > 20,000) spectroscopic observations; these parameters will then be used to compute asteroseismic models of these stars and to interpret the Kepler light curves.We use the method of cross correlation to measure the radial velocity (RV) of our targets, while atmospheric parameters are derived using the ROTFIT code and spectral synthesis method. We discover three double-lined spectroscopic binaries, HIP 94924, HIP 95115, and HIP 97321 - for the last system, we provide the orbital solution, and we report two suspected single-lined spectroscopic binaries, HIP94112 and HIP 96062. For all stars from our sample we derive RV, v sin i, Teff, log g, and metallicity, and for six stars, we perform a detailed abundance analysis. A spectral classification is done for 33 targets. Finally, we show that the early-type star HIP 94472 is rotating slowly (v sin i = 13 kms/1) and we confirm its classification to the Am spectral type which makes it an interesting and promising target for asteroseismic modeling. The comparison of the results reported in this paper with the information in the Kepler Input Catalog (KIC) shows an urgent need for verification and refinement of the atmospheric parameters listed in the KIC. That refinement is crucial for making a full use of the data delivered by Kepler and can be achieved only by a detailed ground-based study.
description: The paper contains 6 figures and 7 tables. Table 1 will be published in full online only. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal