cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Doublon dynamics in the extended Fermi Hubbard model
Creators: name: Hofmann, Felix
name: Potthoff, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two fermions occupying the same site of a lattice model with strongly repulsive Hubbard-type interaction U form a doublon, a long-living excitation the decay of which is suppressed because of energy conservation. By means of an exact-diagonalization approach based on the Krylov-space technique, we study the dynamics of a single doublon, of two doublons, and of a doublon in the presence of two additional fermions prepared locally in the initial state of the extended Hubbard model. The time dependence of the expectation value of the double occupancy at the different sites of a large one-dimensional lattice is analyzed by perturbative arguments. In this way the spatiotemporal evolution of the doublon can be understood. The initial decay takes place on a short time scale 1/U, and the long-time average of the decayed fraction of the total double occupancy scales as 1/U^2 . We demonstrate how the dynamics of a doublon in the initial state is related to the spectrum of two-fermion excitations obtained from linear-response theory, we work out the difference between doublons composed of fermions vs doublons composed of bosons, and we show that despite the increase of phase space for inelastic decay processes, the stability of a doublon is enhanced by the presence of additional fermions on an intermediate time scale.
description: 15 pages, 10 figures
title: Block (Jacob Heinrich’s widow)
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Block (Jacob Heinrich’s widow) as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Equations of Motion in Double Field Theory: From Particles to Scale Factors
Creators: name: Kan, Nahomi
name: Kobayashi, Koichiro
name: Shiraishi, Kiyoshi
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In double field theory, the equation of motion for a point particle in the background field is considered. We find that the motion is described by a geodesic flow in the doubled geometry. Inspired by the analysis on the particle motion, we consider a modified model of quantum string cosmology, which includes two scale factors.
description: 25pages, no figure, revised version
Revisiting (quasi-)exactly solvable rational extensions of the Morse potential
Creators: name: Quesne, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The construction of rationally-extended Morse potentials is analyzed in the framework of first-order supersymmetric quantum mechanics. The known family of extended potentials $V_{A,B,{\rm ext}}(x)$, obtained from a conventional Morse potential $V_{A-1,B}(x)$ by the addition of a bound state below the spectrum of the latter, is re-obtained. More importantly, the existence of another family of extended potentials, strictly isospectral to $V_{A+1,B}(x)$, is pointed out for a well-chosen range of parameter values. Although not shape invariant, such extended potentials exhibit a kind of `enlarged' shape invariance property, in the sense that their partner, obtained by translating both the parameter $A$ and the degree $m$ of the polynomial arising in the denominator, belongs to the same family of extended potentials. The point canonical transformation connecting the radial oscillator to the Morse potential is also applied to exactly solvable rationally-extended radial oscillator potentials to build quasi-exactly solvable rationally-extended Morse ones.
description: 24 pages, no figure, published version
title: Ludwig Rudolf von Braunschweig-Lüneburg-Wolfenbüttel
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Ludwig Rudolf von Braunschweig-Lüneburg-Wolfenbüttel as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
title: Deutschland muss beim Cloud- Computing am Ball bleiben, um Wettbewerbsfähigkeit zu erhalten: Interview
Creators: name: Schiersch, Alexander
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 20, S. 241
Gluon Spin, Canonical Momentum, and Gauge Symmetry
Creators: name: Ji, Xiangdong
name: Xu, Yang
name: Zhao, Yong
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is well known that in gauge theories, the spin (and orbital angular momentum) of gauge particles is not gauge invariant, although the helicity is; neither are the canonical momentum and canonical angular momentum of charged particles. However, the simple appeal of these concepts has motivated repeated attempts to resurrect them as physical descriptions of gauge systems. In particular, measurability of the gluon-spin-contribution to the proton helicity in polarized proton scattering has generated many theoretical efforts in generalizing it and others as gauge-invariant quantities. In this work, we analyze the constraints of gauge symmetry, the significance of gluon spin in the light-cone gauge, and what is possible and natural in QCD parton physics, emphasizing experimental observability and physical interpretation in the structure of bound states. We also comment on the measurability of the orbital angular momentum of the Laguerre-Gaussian laser modes in optics.
description: 17 pages, latex, 1 figure
Energy recovery in filament-regime plasma wakefield acceleration of positron beams
Creators: name: Varverakis, Max
name: Holtzapple, Robert
name: Diederichs, Severin
name: Schroeder, Carl
name: Gessner, Spencer
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: accelerator: plasma
plasma: wake field
positron: acceleration
positron: beam
electron: secondary beam
energy recovery
efficiency
numerical calculations
programming

description: Plasma wakefield acceleration using an electron filament offers stable, high-gradient, high-quality acceleration of positron beams analogous to the acceleration of electrons in the blowout regime. However, low energy-transfer efficiency is currently a limiting factor for future collider applications. We explore the addition of a secondary electron bunch in the electron filament plasma wakefield acceleration scheme to recover additional energy from the wake. Particle-in-cell simulations using HiPACE++ are used to demonstrate various energy recovery schemes. In addition to confirming the energy efficiency gains with a recovery electron beam, we also develop energy recovery schemes in the context of future plasma colliders.
Criteria of off-diagonal long-range order in Bose and Fermi systems based on the Lee-Yang cluster expansion method
Creators: name: Sakumichi, Naoyuki
name: Kawakami, Norio
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The quantum-statistical cluster expansion method of Lee and Yang is extended to investigate off-diagonal long-range order (ODLRO) in one- and multi-component mixtures of bosons or fermions. Our formulation is applicable to both a uniform system and a trapped system without local-density approximation and allows systematic expansions of one- and multi-particle reduced density matrices in terms of cluster functions which are defined for the same system with Boltzmann statistics. Each term in this expansion can be associated with a Lee-Yang graph. We elucidate a physical meaning of each Lee-Yang graph; in particular, for a mixture of ultracold atoms and bound dimers, an infinite sum of the ladder-type Lee-Yang 0-graphs is shown to lead to Bose-Einstein condensation of dimers below the critical temperature. In the case of Bose statistics, an infinite series of Lee-Yang 1-graphs is shown to converge and gives the criteria of ODLRO at the one-particle level. Applications to a dilute Bose system of hard spheres are also made. In the case of Fermi statistics, an infinite series of Lee-Yang 2-graphs is shown to converge and gives the criteria of ODLRO at the two-particle level. Applications to a two-component Fermi gas in the tightly bound limit are also made.
description: 21 pages, 10 figures
title: Cloud-Lösungen können Produktivität steigern
Creators: name: Duso, Tomaso
name: Schiersch, Alexander
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: D24 Production; Cost; Capital, Total Factor, and Multifactor Productivity; Capacity
subject: L60 Industry Studies: Manufacturing: General
subject: L80 Industry Studies: Services: General
subject: O14 Industrialization; Manufacturing and Service Industries; Choice of Technology
subject: O33 Technological Change: Choices and Consequences; Diffusion Processes
subject: cloud computing
subject: investment
subject: productivity
subject: IT
subject: substitution
subject: firm performance

description: Cloud-Computing ist für Unternehmen eine kostengünstige und flexible Art der IT-Nutzung, ohne dass Investitionen in die eigene, teure und starre IT-Infrastruktur notwendig sind. Daher wird erwartet, dass die Nutzung von Cloud-Diensten sich in geringeren IT-Investitionen niederschlägt und zugleich die Produktivität erhöht. Ob dem tatsächlich so ist, wird mit Hilfe von aktuellen aggregierten Daten und speziellen Unternehmensdaten für die Jahre 2014 und 2016 nachgegangen. Es zeigt sich, dass die Verwendung von Cloud-Computing in keinem der untersuchten Wirtschaftszweige mit signifikant geringeren IT-Investitionen einhergeht. Allerdings findet sich für das Verarbeitende Gewerbe ein positiver Zusammenhang zwischen der Arbeitsproduktivität von Unternehmen und der Nutzung von Cloud-Computing. Um Chancen der Cloud-Technologie voll auszuschöpfen und die Wettbewerbsfähigkeit der Unternehmen zu erhalten oder gar zu steigern, sollte der Staat die Rahmenbedingungen verbessern, unter anderem indem er den Ausbau der Breitbandinfrastruktur – wo notwendig – unterstützt. Darüber hinaus ist eine aufgeschlossenere Haltung gegenüber innovativen Technologien in Unternehmen und Gesellschaft notwendig.
description: DIW Wochenbericht, 90 (2023), 20, S. 233-240
title: Luise Pfalz-Simmern
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Luise Pfalz-Simmern as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Angles in Fuzzy Disc and Angular Noncommutative Solitons
Creators: name: Kobayashi, Shinpei
name: Asakawa, Tsuguhiko
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The fuzzy disc, introduced by the authors of Ref.[1], is a disc-shaped region in a noncommutative plane, and is a fuzzy approximation of a commutative disc. In this paper we show that one can introduce a concept of angles to the fuzzy disc, by using the phase operator and phase states known in quantum optics. We gave a description of a fuzzy disc in terms of operators and their commutation relations, and studied properties of angular projection operators. A similar construction for a fuzzy annulus is also given. As an application, we constructed fan-shaped soliton solutions of a scalar field theory on a fuzzy disc, which corresponds to a fan-shaped D-brane. We also applied this concept to the theory of noncommutative gravity that we proposed in Ref.[2]. In addition, possible connections to black hole microstates, holography and an experimental test of noncommutativity by laser physics are suggested.
description: 24 pages, 12 figures; v2: minor mistake corrected in Eq.(3.21), and discussion adapted accordingly; v3: a further discussion on the algebra of the fuzzy disc added in subsection 3.2; v4: discussions improved and typos corrected
The modification of the energy spectrum of charged particles by exotic open 4-smoothness via superstring theory
Creators: name: Asselmeyer-Maluga, Torsten
name: Gusin, Paweł
name: Król, Jerzy
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we present a model where the modified Landau-like levels of charged particles in a magnetic field are determined due to the modified smoothness of $\mathbb{R}^{4}$ as underlying structure of the Minkowski spacetime. Then the standard smoothness of $\mathbb{R}^{4}$ is shifted to the exotic $\mathbb{R}_{k}^{4}$, $k=2p$, $p=1,2...$. This is achieved by superstring theory using gravitational backreaction induced from a strong, almost constant magnetic field on standard $\mathbb{R}^{4}$. The exact string background containing flat $\mathbb{R}^{4}$ is replaced consistently by the curved geometry of $SU(2)_{k}\times\mathbb{R}$ as part of the modified exact backgrounds. This corresponds to the change of smoothness on $\mathbb{R}^{4}$ from the standard $\mathbb{R}^{4}$ to some exotic $\mathbb{R}_{k}^{4}$. The calculations of the spectra are using the CFT marginal deformations and Wess-Zumino-Witten (WZW) models. The marginal deformations capture the effects of the magnetic field as well as its gravitational backreactions. The spectra depend on even level $k$ of WZW on SU(2). At the same time the WZ term as element of $H^{3}(SU(2),\mathbb{R})$ determines also the exotic smooth $\mathbb{R}_{k}^{4}$. As the consequence we obtain a non-zero mass-gap emerges in the spectrum induced from the presence of an exotic $\mathbb{R}_{k}^{4}$.
description: 11 pages, Revtex4-1, will appear IJGMMP Vol. 50(1), 2013
title: Luise Ernestine Friederike von Hohenzollern-Hechingen
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Luise Ernestine Friederike von Hohenzollern-Hechingen as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
title: Ludolf Georg Lünde
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Ludolf Georg Lünde as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Interplay between hydrodynamics and the free energy surface in the assembly of nanoscale hydrophobes
Creators: name: Morrone, Joseph A.
name: Li, Jingyuan
name: Berne, B. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Solvent plays an important role in the relative motion of nanoscopic bodies, and the study of such phenomena can help elucidate the mechanism of hydrophobic assembly, as well as the influence of solvent-mediated effects on in vivo motion in crowded cellular environments. Here we study important aspects of this problem within the framework of Brownian dynamics. We compute the free energy surface that the Brownian particles experience and their hydrodynamic interactions from molecular dynamics simulations in explicit solvent. We find that molecular scale effects dominate at short distances, thus giving rise to deviations from the predictions of continuum hydrodynamic theory. Drying phenomena, solvent layering, and fluctuations engender distinct signatures of the molecular scale. The rate of assembly in the diffusion-controlled limit is found to decrease from molecular scale hydrodynamic interactions, in opposition to the free energy driving force for hydrophobic assembly, and act to reinforce the influence of the free energy surface on the association of more hydrophilic bodies.
description: 20 pages, 10 figures
Spin-orbit-enhanced Wigner localization in quantum dots
Creators: name: Cavalli, A.
name: Malet, F.
name: Cremon, J. C.
name: Reimann, S. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate quantum dots with Rashba spin-orbit coupling in the strongly-correlated regime. We show that the presence of the Rashba interaction enhances the Wigner localization in these systems, making it achievable for higher densities than those at which it is observed in Rashba-free quantum dots. Recurring shapes in the pair-correlated densities of the yrast spectrum, which might be associated with rotational and vibrational modes, are also reported.
description: 5 pages, 4 figures
title: Der Emissionshandel braucht ein starkes Klimaschutzgesetz: Kommentar
Creators: name: Neuhoff, Karsten
name: Kröger, Mats
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 19, S. 230
title: 3.0T MRI of knee joint cartilage in children with alkaptonuria
Creators: name: Kujawa, Mariusz
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Musculoskeletal joint
subject: MR
subject: Diagnostic procedure
subject: Congenital

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Alkaptonuria (AKU) is a rare autosomal recessive genetic disease that involves the disruption of tyrosine metabolism. It is caused by mutation of the homogentisin acid dioxygenase (HGD) gene. Abnormal HGD enzyme activity leads to excess homogentisin...
title: Chancen geflüchteter Frauen auf Arbeitsmarkt durch Integrationsprogramme stärken: Interview
Creators: name: Cardozo Silva, Adriana
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 19, S. 226
title: Impact of a Dose Team for the optimisation of CT protocols
Creators: name: Badia, Stefano
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Oncology
subject: Radioprotection / Radiation dose
subject: Radiographers
subject: CT
subject: Dosimetry
subject: Radiation safety
subject: Cancer
subject: Education and training

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Evaluate the impact of a Dose Team for the optimisation of CT exams in oncologic...
title: Erwerbschancen geflüchteter Frauen in Deutschland verbessern sich trotz ungünstiger Ausgangslage
Creators: name: Cardozo Silva, Adriana
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: J15 Economics of Minorities, Races, and Immigrants; Non-labor Discrimination
subject: J22 Time Allocation and Labor Supply
subject: F22 International Migration
subject: Refugees
subject: Integration
subject: Labor Force Participation
subject: Language Skills of Refugees

description: Die Mehrheit der geflüchteten Frauen, die zwischen 2013 und 2019 und damit auch zum Höhepunkt der Fluchtmigration 2015 nach Deutschland kamen, ist nicht erwerbstätig. Auf Grundlage von Daten aus der IAB-BAMF-SOEP-Geflüchteten- Befragung sucht diese Studie nach Erklärungen für die begrenzte Erwerbsbeteiligung von Frauen mit Fluchthintergrund. Die Ergebnisse zeigen, dass eine Kombination aus niedrigem Bildungsniveau im Vergleich zur deutschen Bevölkerung, langsamen Fortschritten beim Spracherwerb und traditionelle Rollen bei der Aufteilung von bezahlter und unbezahlter Arbeit innerhalb der Familie Hemmnisse für die Arbeitsmarktintegration der Frauen darstellen. Dennoch hat sich der Anteil der geflüchteten Frauen, die einer bezahlten Beschäftigung nachgehen, verdoppelt. Darüber hinaus halbierte sich der Anteil der Frauen mit geringen Deutschkenntnissen. Gleichzeitig nahm der Anteil der Frauen mit mittleren oder guten Sprachkenntnissen zu. Der Anteil junger geflüchteter Frauen, die an Bildungsprogrammen teilnahmen, verdreifachte sich. Dies zeigt, dass die Integration von geflüchteten Frauen in den Arbeitsmarkt voranschreitet. Daher wird dringend der Ausbau bestehender Integrationsmaßnahmen, die speziell auf Frauen zugeschnitten sind, empfohlen.
description: DIW Wochenbericht, 90 (2023), 19, S. 217-225
Electroweak radiative corrections and unitarity of Standard Model
Creators: name: Ovanesyan, Grigory
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Electroweak corrections to longitudinal gauge and Higgs boson scattering amplitudes are calculated. Due to Sudakov double logarithms, the effect is a suppression of amplitude that grows rapidly with increasing center of mass energy leading to significant reduction of cross sections compared to tree level results. For example, the suppression factor for the cross section of $W^+_{\text{L}}W^-_{\text{L}}$ scattering due to these corrections varies from 0.3 at the center of mass energy of $100\text{TeV}$ to a factor of $10^{-12}$ at the center of mass energy of $10^{13}\text{TeV}$. The modification of SM unitarity bound due to these corrections is obtained.
description: 9 pages, 5 figures, information on v2: some minor typos fixed, published version
Transport of Indirect Excitons in a Potential Energy Gradient
Creators: name: Leonard, J. R.
name: Remeika, M.
name: Chu, M. K.
name: Kuznetsova, Y. Y.
name: High, A. A.
name: Butov, L. V.
name: Wilkes, J.
name: Hanson, M.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We realized a potential energy gradient - a ramp - for indirect excitons using a shaped electrode at constant voltage. We studied transport of indirect excitons along the ramp and observed that the exciton transport distance increases with increasing density and temperature.
description: 4 pages, 3 figures
title: Association of mammographic features with molecular breast tumour profiles
Creators: name: Sartor, Hanna
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Molecular, genomics and proteomics
subject: Cancer
subject: Radiobiology
subject: Mammography
subject: Breast

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Mammographic breast density (Fig 1) and mammographic breast tumour appearance (Fig 2), which together may be referred to as mammographic features, are prognostic factors in women with breast cancer [1, 2]. It is conceivable that mammographic...
Remarks concerning bulk viscosity of hadron matter in relaxation time ansatz
Creators: name: Khvorostukhin, A. S.
name: Toneev, V. D.
name: Voskresensky, D. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The bulk viscosity is calculated for hadron matter produced in heavy-ion collisions, being described in the relaxation time approximation withi n the relativistic mean- field-based model with scaled hadron masses and couplings. W e show how different approximations used in the literature affect the result. Nume rical evaluations of the bulk viscosity with three considered models deviate not much from each other confirming earlier results.
description: 17 pages, 3 figures
title: CT assessment of severity in acute pancreatitis: application of the revised Atlanta morphological classification
Creators: name: JEMEL, EYA
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Abdomen
subject: Pancreas
subject: CT
subject: Comparative studies
subject: Tissue characterisation

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Early identification of severe acute pancreatitis (AP) is critical for the triage and treatment of patients. The revised Atlanta classification makes a clear distinction between clinical and morphological severity. The aim of our study was to...
title: Interventional radiology in metastatic adrenal cell carcinoma
Creators: name: Basile, Domenico
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Interventional non-vascular
subject: Oncology
subject: Liver
subject: CT
subject: Ultrasound
subject: Ablation procedures

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Adrenocortical carcinoma (ACC) is a very uncommon disease, with an incidence of approximately 1-2 per million per year in the United Statesand a prevalence <0,1 per 10000. On the other hand, it is a very aggressive tumor, with a poor...
title: Aktueller Königsteiner Schlüssel ist in vielen Fällen kein faires und probates Mittel: Interview
Creators: name: Weinhardt, Felix
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 18, S. 210
title: What radiologist should know about Abdominopelvic compression syndromes
Creators: name: Gökkuş, Halil
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Obstruction / Occlusion
subject: eLearning
subject: Education
subject: MR-Angiography
subject: CT
subject: Vascular
subject: Pelvis
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To increase awareness of radiologists about abdominopelvic compression syndromes. To describe multimodality imaging findingsof abdominopelvic compression...
title: Value of US duplex scanning in acute limb ischaemia: acute embolic or thrombotic ischaemia?
Creators: name: Borzelli, Antonio
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Arteries / Aorta
subject: Extremities
subject: Vascular
subject: Ultrasound
subject: Catheter arteriography
subject: Comparative studies
subject: Embolism / Thrombosis

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Asses and evaluate the ability of US duplex scanning in differentiating embolic from thrombotic acute arterial occlusion in acute limb...
Observable Optimal State Points of Sub-additive Potentials
Creators: name: Catsigeras, Eleonora
name: Zhao, Yun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A30, 37L40

description: For a sequence of sub-additive potentials, Dai [Optimal state points of the sub-additive ergodic theorem, Nonlinearity, 24 (2011), 1565-1573] gave a method of choosing state points with negative growth rates for an ergodic dynamical system. This paper generalizes Dai's result to the non-ergodic case, and proves that under some mild additional hypothesis, one can choose points with negative growth rates from a positive Lebesgue measure set, even if the system does not preserve any measure that is absolutely continuous with respect to Lebesgue measure.
description: 16 pages. This work was reported in the summer school in Nanjing University. In this second version we have included some changes suggested by the referee. The final version will appear in Discrete and Continuous Dynamical Systems- Series A - A.I.M. Sciences and will be available at http://aimsciences.org/journals/homeAllIssue.jsp?journalID=1
title: Königsteiner Schlüssel verteilt Gelder und Aufgaben zwischen Bundesländern kaum nach Wirtschaftskraft
Creators: name: Schmandt, Marco
name: Tielkes, Constantin
name: Weinhardt, Felix
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: H75 State and Local Government: Health; Education; Welfare; Public Pensions
subject: H76 State and Local Government: Other Expenditure Categories
subject: H30 Fiscal Policies and Behavior of Economic Agents: General
subject: regional inequality
subject: fiscal policy

description: Mit dem Königsteiner Schlüssel werden Ausgaben und Aufgaben zwischen den Ländern in Deutschland verteilt. Zur Berechnung des Schlüssels wird der Bevölkerungsanteil zu einem Drittel und die Wirtschaftskraft der Länder zu zwei Dritteln angesetzt. Als Wirtschaftskraft werden die Steuereinnahmen der Länder herangezogen. Jedoch wird zur Berechnung des Königsteiner Schlüssels das Steueraufkommen nach Umverteilung zwischen den Ländern zugrunde gelegt. Da dadurch die Einnahmen nahezu ausgeglichen sind, hat die tatsächliche wirtschaftliche Stärke eines Bundeslandes im Endeffekt für den Königsteiner Schlüssel so gut wie keine Relevanz. Letztendlich verteilt der Königsteiner Schlüssel fast ausschließlich nach Bevölkerungsanteil. Für die vielfältigen Verwendungen des Königsteiner Schlüssels, etwa die Verteilung geflüchteter Menschen oder von Bildungsbeteiligungen des Bundes, ist es äußerst fraglich, ob diese Verteilung zielführend oder politisch gewollt ist. Bei der Verteilung Geflüchteter wird der Schlüssel ohnehin nicht eingehalten. Eine bedarfsgerechte Verteilung macht je nach konkretem Anwendungsfall einen durchdachten und transparenten Verteilmechanismus notwendig. Der Königsteiner Schlüssel kann das nicht leisten.
description: DIW Wochenbericht, 90 (2023), 18, S. 203-209
Limits of minimal models and continuous orbifolds
Creators: name: Gaberdiel, Matthias R.
name: Suchanek, Paulina
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The lambda=0 't Hooft limit of the 2d W_N minimal models is shown to be equivalent to the singlet sector of a free boson theory, thus paralleling exactly the structure of the free theory in the Klebanov-Polyakov proposal. In 2d, the singlet sector does not describe a consistent theory by itself since the corresponding partition function is not modular invariant. However, it can be interpreted as the untwisted sector of a continuous orbifold, and this point of view suggests that it can be made consistent by adding in the appropriate twisted sectors. We show that these twisted sectors account for the `light states' that were not included in the original 't Hooft limit. We also show that, for the Virasoro minimal models (N=2), the twisted sector of our orbifold agrees precisely with the limit theory of Runkel & Watts. In particular, this implies that our construction satisfies crossing symmetry.
description: 33 pages; v2: minor improvements and references added, published version
Scattering theory with finite-gap backgrounds: Transformation operators and characteristic properties of scattering data
Creators: name: Egorova, Iryna
name: Michor, Johanna
name: Teschl, Gerald
Publisher: name: arXiv
Year: 2012
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 47B36, 81U40, Secondary 34L25, 39A10

description: We develop direct and inverse scattering theory for Jacobi operators (doubly infinite second order difference operators) with steplike coefficients which are asymptotically close to different finite-gap quasi-periodic coefficients on different sides. We give necessary and sufficient conditions for the scattering data in the case of perturbations with finite second (or higher) moment.
description: 23 pages
title: Importance and methods of intracerebral hemorrhage volume measurement on MDCT
Creators: name: Jankovic, Sonja
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Vascular
subject: Neuroradiology brain
subject: CNS
subject: CT
subject: Diagnostic procedure
subject: Comparative studies
subject: Computer Applications-3D
subject: Haemorrhage
subject: Acute
subject: Pathology

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Intracerebral hemorrhage (ICH) is an urgent neurological and neurosurgical condition with potentially high mortality. The most common causes of ICH are hypertension, arteriovenous malformation, head trauma, tumors and aneurysms [1]. The initial...
Improved convergence of scattering calculations in the oscillator representation
Creators: name: Bidasyuk, Yuriy
name: Vanroose, Wim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Schrödinger equation for two and tree-body problems is solved for scattering states in a hybrid representation where solutions are expanded in the eigenstates of the harmonic oscillator in the interaction region and on a finite difference grid in the near-- and far--field. The two representations are coupled through a high--order asymptotic formula that takes into account the function values and the third derivative in the classical turning points. For various examples the convergence is analyzed for various physics problems that use an expansion in a large number of oscillator states. The results show significant improvement over the JM-ECS method [Bidasyuk et al, Phys. Rev. C 82, 064603 (2010)].
title: Pancreatic calcifications: spectrum of causes and differential diagnosis in CT-imaging.
Creators: name: Pennisi, Luciano
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Abdomen
subject: Gastrointestinal tract
subject: Pancreas
subject: CT
subject: MR
subject: Imaging sequences
subject: Calcifications / Calculi

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To identify the usual imaging appearances related to calcification of the pancreas and their underlying...
title: Auch nach der Reform bleibt das Armutsrisiko Erwerbsgeminderter sehr hoch: Interview
Creators: name: Geyer, Johannes
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 17, S. 198
title: CHALLENGES IN METASTATIC GASTROENTERO-PANCREATIC NEUROENDOCRINE NEOPLASMS (GEP-NENs) IN WELL-DIFFERENTIATED G1 PRIMITIVE TUMORS
Creators: name: Perrucci, Luca
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Oncology
subject: Professional issues
subject: Nuclear medicine
subject: PET-CT
subject: MR
subject: CT
subject: Surgery
subject: Radiation therapy / Oncology
subject: Radionuclide therapy
subject: Metastases
subject: Multidisciplinary cancer care
subject: Endocrine disorders

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Metastatic gastroenteropancreatic(GEP)-neuroendocrine neoplasms(-NENs) classified as G1 define heterogeneous clinical scenarios with a wide possibility of treatments, which are debated in the multi-disciplinary meetings dedicated to NEN at our...
Mapping Addresses to L3/CHA Slices in Intel Processors
Creators: name: McCalpin, John D.
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Microprocessors
Multicore Processing
Cache Memory
System-on-Chip
Reverse Engineering

description: The distributed, shared L3 caches in Intel multicore processors are composed of “slices” (typically one “slice” per core), each assigned responsibility for a fraction of the address space. A high degree of interleaving of consecutive cache lines across the slices provides the appearance of a single cache resource shared by all cores. A family of undocumented hash functions is used to distribute addresses to slices, with different hash functions required for different numbers of slices. In all systems studied to date, the hash consists of a relatively short (16 to 16384 elements) “base sequence” of slice numbers, which is repeated with binary permutations for consecutive blocks of memory. The specific binary permutation used is selected by XOR-reductions of different subsets of the higher-order address bits. This report provides the base sequences and permutation select masks for Intel Xeon Scalable Processors (1st and 2nd generation) with 14, 16, 18, 20, 22, 24, 26, 28 slices, for 3rd Generation Intel Xeon Scalable Processors with 28 slices, and for Xeon Phi x200 processors with 38 slices.
title: Fat-containing lesions of the liver: radiologic appearance and the importance of MR imaging.
Creators: name: Putortì, Valeria
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Gastrointestinal tract
subject: Abdomen
subject: MR
subject: Imaging sequences
subject: Cysts
subject: Cancer
subject: Tissue characterisation

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: List the wide spectrum of fat-containing lesions of the liver and identify the imaging...
title: Reform der Erwerbsminderungsrente senkt Armutsrisiko, kommt aber spät
Creators: name: Becker, Sebastian
name: Gehlen, Annica
name: Geyer, Johannes
name: Haan, Peter
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: D31 Personal Income, Wealth, and Their Distributions
subject: H55 Social Security and Public Pensions
subject: I14 Health and Inequality
subject: disability pension
subject: poverty
subject: pension reform

description: Ein Unfall, eine chronische Erkrankung oder auch eine angeborene Behinderung sind häufige Ursachen für den Verlust der Erwerbsfähigkeit. Der Wegfall des Erwerbseinkommens wird zwar durch die Erwerbsminderungsrente in der gesetzlichen Rentenversicherung versichert. Diese Rente ist aber so niedrig, dass Erwerbsgeminderte einem sehr hohen Armutsrisiko ausgesetzt sind und überdurchschnittlich häufig Leistungen der Grundsicherung beziehen. Seit der Rentenreform 2001 sind die durchschnittlichen Leistungen stark zurückgegangen. Reformen in den Jahren 2014 und 2019 führten zwar Verbesserungen für neu zugehende Renten ein, der Rentenbestand profitierte allerdings nicht davon. Dies wird erst zum Juli 2024 nachgeholt. Berechnungen zeigen, dass diese Reform das Armutsrisiko zwar um knapp acht Prozent senken kann, Erwerbsgeminderte aber weiterhin überdurchschnittlich häufig von Armut betroffen sind. Zudem haben die Betroffenen eine niedrige Lebenserwartung; ein relevanter Teil der potenziell Begünstigten wird nicht mehr am Leben sein, wenn die Reform in Kraft tritt. Die Ergebnisse verdeutlichen, dass es bei dieser Leistung auf eine schnellere Umsetzung ankommt und weitere Maßnahmen nötig sind, um das Armutsrisiko bei Erwerbsminderung zu reduzieren.
description: DIW Wochenbericht, 90 (2023), 17, S. 191-197
Casimir scaling and renormalization of Polyakov loops in large-N gauge theories
Creators: name: Mykkanen, Anne
name: Panero, Marco
name: Rummukainen, Kari
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study Casimir scaling and renormalization properties of Polyakov loops in different irreducible representations in SU(N) gauge theories; in particular, we investigate the approach to the large-N limit, by performing lattice simulations of Yang-Mills theories with an increasing number of colors, from 2 to 6. We consider the twelve lowest irreducible representations for each gauge group, and find strong numerical evidence for nearly perfect Casimir scaling of the bare Polyakov loops in the deconfined phase. Then we discuss the temperature dependence of renormalized loops, which is found to be qualitatively and quantitatively very similar for the various gauge groups. In particular, close to the deconfinement transition, the renormalized Polyakov loop increases with the temperature, and its logarithm reveals a characteristic dependence on the inverse of the square of the temperature. At higher temperatures, the renormalized Polyakov loop overshoots one, reaches a maximum, and then starts decreasing, in agreement with weak-coupling predictions. The implications of these findings are discussed.
description: 1+33 pages, 14 figures; v2: expanded discussion in sections 2 and 3, added references: version published in JHEP
title: Imaging of the Urachus from congenital anomalies to infection and neoplasm: A Pictorial Review
Creators: name: GUERROUM, Hind
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Abdomen
subject: Urinary Tract / Bladder
subject: Ultrasound
subject: CT
subject: MR
subject: Biopsy
subject: Surgery
subject: Cancer
subject: Infection
subject: Congenital

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Review the embryologic development, anatomy, and imaging appearance of the urachus. Describe and illustrate congenital urachal anomalies, infection and...
Symmetries of Holographic Super-Minimal Models
Creators: name: Hanaki, Kentaro
name: Peng, Cheng
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the asymptotic symmetry of the higher-spin supergravity theory in AdS_3 and obtain an infinite-dimensional non-linear superalgebra, which we call the super-W_infinity[lambda] algebra. According to the recently proposed supersymmetric duality between higher-spin supergravity in an AdS_3 background and the 't Hooft limit of the N=2 CP^n Kazama-Suzuki model on the boundary, this symmetry algebra should agree with the 't Hooft limit of the chiral algebra of the CFT, SW_n. We provide two nontrivial checks of the duality. By comparing the algebras, we explicitly match the lowest-spin commutation relations in the super-W_infinity[lambda] with the corresponding commutation relations in the 't Hooft limit on the CFT side. We also consider the degenerate representations of the two algebras and find that the spectra of the chiral primary fields are identical.
description: 33 pages, references added, some errors corrected, discussions about the truncation of the shs[lambda] algebra and reobtaining the original shs[lambda] algebra from the super-W_infinity[lambda] algebra added
title: Could we Rely on T2-Signal Intensity Characteristics to Safely Avoid MRI Guided Breast Biopsy?
Creators: name: AlSharif, Shaza
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Cancer
subject: Diagnostic procedure
subject: Biopsy
subject: MR
subject: Oncology
subject: Interventional non-vascular
subject: Breast

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Aim: To minimize MRI-guided breast biopsies based on T2-signal intensity characteristics. Objectives: Study the MRI guided breast biopsy demographics. CorrelateT2-Signal intensity in relation to final pathology results in cases of MRI guided breast...
title: Ausgaben für Heizung und Strom: Sparanreize greifen nicht für Menschen in der Grundsicherung
Creators: name: Bach, Stefan
name: Felder, Lars
name: Haan, Peter
name: Schill, Wolf-Peter
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: Q41 Energy: Demand and Supply
subject: H53 National Government Expenditures and Welfare Programs
subject: D31 Personal Income, Wealth, and Their Distributions
subject: energy cost
subject: heating cost
subject: social transfers
subject: income distribution

description: Im Rahmen der Grundsicherung werden die tatsächlich anfallenden Heizungsrechnungen übernommen, sofern diese nicht unangemessen hoch sind. Dagegen werden Ausgaben für Strom lediglich pauschal im Regelsatz berücksichtigt. Somit haben Grundsicherungsbeziehende weniger Anreize, ihre Ausgaben für Heizenergie zu reduzieren als ihre Ausgaben für Strom. Auf Basis von Daten des Sozio-oekonomischen Panels (SOEP) zeigt sich, dass Haushalte in der Grundsicherung trotz dieser Anreize hohe Stromausgaben haben. Im Durchschnitt geben Grundsicherungsbeziehende im Monat fünf Euro mehr für die Heizung und neun Euro mehr für Strom aus als vergleichbare Haushalte außerhalb der Grundsicherung. Dies kann daran liegen, dass die Haushalte nicht ausreichend über ihre Ausgaben und Einsparmöglichkeiten für Energie informiert sind oder dass sie aufgrund einer schlechten technischen Ausstattung sowie längeren Aufenthaltszeiten zu Hause nicht sparen können. Eine Klimapolitik, die Sparanreize durch eine steigende CO2-Bepreisung setzen möchte, sollte diese Zusammenhänge berücksichtigen. Sie kann nur wirksam sein, wenn Haushalte auf Preisanreize reagieren können. Daher sind neben steigender CO2-Bepreisung zielgerichtete Förderprogramme für Energieeffizienzmaßnahmen sowie Informationskampagnen für Haushalte erforderlich.
description: DIW Wochenbericht, 90 (2023), 16, S. 179-185
title: A diagnostic approach to the anterior mediastinal masses: Beyond the 4 T's
Creators: name: Grippo, Raffaele
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Neoplasia
subject: Lymphoma
subject: Education
subject: Diagnostic procedure
subject: CT
subject: Conventional radiography
subject: Thorax
subject: Oncology
subject: Mediastinum

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The purpose of this educational exhibit is to provide a systematic overview of the mediastinal masses, highlighting which are the most common and uncommon imaging differential...
title: Dose optimisation for computed tomography localiser radiographs using spectral shaping tin filter
Creators: name: Saltybaeva, Natalia
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Radioprotection / Radiation dose
subject: Radiation physics
subject: CT
subject: Dosimetry
subject: Radiation safety

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: In the past decade, multiple advances in computed tomography (CT) hardware and software have been introduced, allowing for substantial radiation dose reduction. [1-3] Recently introduced selective photon shield represented by a tin filter mounted in...