cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bulk Higgs and Gauge fields in a multiply warped braneworld model
Creators: name: Das, Ashmita
name: Hundi, R. S.
name: SenGupta, Soumitra
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We readdress the problems associated with bulk Higgs and the gauge fields in a 5-dimensional Randall-Sundrum model by extending the model to six dimensions with double warping along the two extra spatial dimensions. In this 6-dimensional model we have a freedom of two moduli scales as against one modulus in the 5-dimensional model. With a little hierarchy between these moduli we can obtain the right magnitude for $W$ and $Z$ boson masses from the Kaluza-Klein modes of massive bulk gauge fields where the spontaneous symmetry breaking is triggered by bulk Higgs . We also have determined the gauge couplings of the standard model fermions with Kaluza-Klein modes of the gauge fields. Unlike the case of 5-dimensional model with a massless bulk gauge field, here we have shown that the gauge couplings and the masses of the Kaluza-Klein gauge fields satisfy the precision electroweak constraints and also obey the Tevatron bounds.
description: 15 Pages, Latex
Krebs in Deutschland 2015/2016
Creators: name: Koch-Institut, Robert
name: Gesellschaft Der Epidemiologischen Krebsregister In Deutschland E.V.
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: RKI
subject: ZfKD
subject: GEKID
subject: Krebs
subject: Deutschland
subject: Mundhöhle
subject: Rachen
subject: Speiseröhre
subject: Magen
subject: Dünndarm
subject: Darm
subject: Anus
subject: Leber
subject: Gallenblase
subject: Gallenwege
subject: Bauchspeicheldrüse
subject: Kehlkopf
subject: Lunge
subject: Malignes Melanom
subject: Hautkrebs
subject: Mesotheliom
subject: Weichteilgewebe
subject: Brustdrüse
subject: Vulva
subject: Gebärmutterhals
subject: Gebärmutterkörper
subject: Eierstöcke
subject: Prostata
subject: Hoden
subject: Niere
subject: Harnblase
subject: Zentrales Nervensystem
subject: Schilddrüse
subject: Morbus Hodgkin
subject: Non-Hodgkin-Lymphome
subject: Multiples Myelom
subject: Leukämie
subject: 610 Medizin und Gesundheit

description: Die 12. Ausgabe von »Krebs in Deutschland« beruht auf Daten der bevölkerungsbezogenen Krebsregister in Deutschland bis zum Jahr 2016. Neben den Herausgebern, der Gesellschaft der epidemiologischen Krebsregister in Deutschland e.V. (GEKID) und dem Zentrum für Krebsregisterdaten im Robert Koch-Institut, haben das Deutsche Kinderkrebsregister und der Krebsinformationsdienst des Deutschen Krebsforschungszentrums wieder Zahlen und Informationen zur Epidemiologie von Krebserkrankungen in Deutschland zusammengetragen. Weitere Auswertungen und Informationen finden sich unter www.krebsdaten.de. In 2016 sind geschätzt ca. 492.000 Menschen in Deutschland neu an Krebs erkrankt. Obwohl für viele Krebsarten zuletzt eher rückläufige Erkrankungsraten zu beobachten sind, ist aufgrund des demografischen Wandels bis zum Jahr 2020 mit einer Zunahme auf rund 510.000 Erkrankungsfälle auszugehen. Nicht berücksichtigt sind in diesen Zahlen, wie international üblich, die etwa 230.000 Neuerkrankungen am nicht-melanotischen (»hellen«) Hautkrebs, für die in dieser Ausgabe erstmals detailliertere Auswertungen in einem eigenen Kapitel präsentiert werden.
Interference effects on the transport characteristics of a benzene single-electron transistor
Creators: name: Darau, Dana
name: Begemann, Georg
name: Donarini, Andrea
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: organic compounds, single electron transistors
subject: 530 Physik

description: Interference effects strongly affect the transport characteristics of a benzene single-electron transistor, and for this reason we call it interference single-electron transistor (I-SET). We focus on the effects of degeneracies between many-body states of the isolated benzene. We show that the particular current blocking and selective conductance suppression occurring in the benzene I-SET are due to interference effects between the orbitally degenerate states. Further we study the impact of reduced symmetry due to anchor groups or potential drop over the molecule. We identify in the quasidegeneracy of the involved molecular states the necessary condition for the robustness of the results.
Spatial and topological organization of DNA chains induced by gene co-localization
Creators: name: Junier, Ivan
name: Martin, Olivier
name: Képès, François
Publisher: name: arXiv
Year: 2010
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Genomics (q-bio.GN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Transcriptional activity has been shown to relate to the organization of chromosomes in the eukaryotic nucleus and in the bacterial nucleoid. In particular, highly transcribed genes, RNA polymerases and transcription factors gather into discrete spatial foci called transcription factories. However, the mechanisms underlying the formation of these foci and the resulting topological order of the chromosome remain to be elucidated. Here we consider a thermodynamic framework based on a worm-like chain model of chromosomes where sparse designated sites along the DNA are able to interact whenever they are spatially close-by. This is motivated by recurrent evidence that there exists physical interactions between genes that operate together. Three important results come out of this simple framework. First, the resulting formation of transcription foci can be viewed as a micro-phase separation of the interacting sites from the rest of the DNA. In this respect, a thermodynamic analysis suggests transcription factors to be appropriate candidates for mediating the physical interactions between genes. Next, numerical simulations of the polymer reveal a rich variety of phases that are associated with different topological orderings, each providing a way to increase the local concentrations of the interacting sites. Finally, the numerical results show that both one-dimensional clustering and periodic location of the binding sites along the DNA, which have been observed in several organisms, make the spatial co-localization of multiple families of genes particularly efficient.
description: Figures and Supplementary Material freely available on http://dx.doi.org/10.1371/journal.pcbi.1000678
Map2Check Tool: Using Symbolic Execution and Fuzzing
Creators: name: Rocha, Herbert
name: Menezes, Rafael
name: Cordeiro, Lucas C.
name: Barreto, Raimundo
Publisher: name: Zenodo
Year: 2020

description: Map2Check is a software verification tool that automatically generating and checking safety properties in C programs. It tracks memory pointers and variable assignments to check user-specified assertions, overflow, and pointer safety. The generation of the test cases are based on assertions (safety properties) from the code instructions, adopting the LLVM framework version 6.0, LibFuzzer, KLEE to generate input values to the test cases generated by Map2Check. Additionally, we have adopted the Crab-LLVM tool to computes inductive invariants for LLVM-based languages. Experimental results show that Map2Check can handle a wide variety of safety properties in several intricate verification tasks from SV-COMP 2020.
Diabetestypen sind nicht auf Altersgruppen beschränkt: Typ-1-Diabetes bei Erwachsenen und Typ-2-Diabetes bei Kindern und Jugendlichen
Creators: name: Rosenbauer, Joachim
name: Neu, Andreas
name: Rothe, Ulrike
name: Seufert, Jochen
name: Holl, Reinhard W.
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: TYP-1-DIABETES
subject: TYP-2-DIABETES
subject: INZIDENZ
subject: PRÄVALENZ
subject: DIABETES-SURVEILLANCE
subject: 610 Medizin und Gesundheit

description: Basierend auf dem bundesweiten DPV-Register (Diabetes-Patienten-Verlaufsdokumentation), dem Diabetesregister in Nordrhein-Westfalen sowie Befragungen von Kliniken und Praxen in Baden-Württemberg und Sachsen wurden Inzidenz und Prävalenz des Typ-1-Diabetes bei Erwachsenen (ab 18 Jahren) und des Typ-2-Diabetes bei Kindern und Jugendlichen (11 bis 18 Jahre) geschätzt. Die bundesweite Inzidenz des Typ-1-Diabetes bei Erwachsenen lag 2014 bis 2016 bei 6,1 pro 100.000 Personenjahre und hier bei Frauen etwas niedriger als bei Männern. Jährlich erkranken circa 4.150 Erwachsene neu an Typ-1-Diabetes. Die Prävalenz des Typ-1-Diabetes bei Erwachsenen wurde 2016 auf 493 pro 100.000 Personen geschätzt und war bei Frauen mit 445 pro 100.000 Personen niedriger als bei Männern mit 544 pro 100.000. Insgesamt waren 2016 etwa 341.000 Erwachsene von einem Typ-1-Diabetes betroffen. Die Inzidenz des Typ-2-Diabetes lag bei Kindern und Jugendlichen im Alter von 11 bis 18 Jahren bundesweit 2014 bis 2016 bei 2,8 pro 100.000 Personenjahre und war bei Mädchen höher als bei Jungen. In dieser Altersgruppe erkranken jährlich circa 175 Heranwachsende neu an einem Typ-2-Diabetes. Für Sachsen wurden höhere Inzidenzen (4,3 pro 100.000 Personenjahre) geschätzt. Die Prävalenz des Typ-2-Diabetes bei 11- bis 18-Jährigen wurde 2014 bis 2016 auf 12 bis 18 pro 100.000 Personen geschätzt. In diesem Zeitraum waren in Deutschland somit etwa 950 Kinder und Jugendliche dieser Altersgruppe von einem Typ-2-Diabetes betroffen.
Symmetry fingerprints of a benzene single-electron transistor: Interplay between Coulomb interaction and orbital symmetry
Creators: name: Begemann, Georg
name: Darau, Dana
name: Donarini, Andrea
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: electrical conductivity, molecular electronics, organic semiconductors, single electron transistors
subject: 530 Physik

description: The interplay between Coulomb interaction and orbital symmetry produces specific transport characteristics in molecular single electron transistors (SETs) that can be considered as the fingerprints of the contacted molecule. Specifically we predict, for a benzene SET, selective conductance suppression and the appearance of negative differential conductance when changing the contacts from para to meta configuration. Both effects originate from destructive interference in transport involving states with orbital degeneracy.
title: ÐÐ°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÐ¹ Ð¿ÑÐ°ÐºÑÐ¸ÐºÑÐ¼ Ð¿Ð¾ Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð¼ÐµÑ Ð°Ð½Ð¸ÐºÐµ
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ Ð¿ÑÐ¸ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÑ Ð¿ÑÐ¾ÑÐµÑÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½ÑÑ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÑ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼ Ð²ÑÑÑÐµÐ³Ð¾ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð´Ð³Ð¾ÑÐ¾Ð²ÐºÐ¸ Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ¸Ð°ÑÐ° 15.03.01 Â«ÐÐ°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸ÐµÂ»
titleType: Subtitle
title: Laboratory workshop on computational mechanics
Creators: name: ÐÐ»Ð¸ÑÐµÐµÐ², ÐÐ¸ÑÐ¸Ð»Ð»
name: ÐÑÐ·Ð¸Ð½, ÐÐ»ÐµÐºÑÐµÐ¹
name: ÐÑÐ»Ð¾Ð², Ð¡ÑÐµÐ¿Ð°Ð½
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÐµÑ Ð°Ð½Ð¸ÐºÐ°

description: Ð ÑÑÐµÐ±Ð½Ð¾Ð¼ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ð¸ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ñ Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÐµ ÑÐ°Ð±Ð¾ÑÑ, ÑÐ°ÑÐºÑÑÐ²Ð°ÑÑÐ¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ CAE ÑÐ¸ÑÑÐµÐ¼ Ð´Ð»Ñ ÑÐ°ÑÑÐµÑÐ° Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ñ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¹. ÐÐ·Ð»Ð¾Ð¶ÐµÐ½Ð¸Ðµ Ð²ÐµÐ´ÐµÑÑÑ Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ CAE Ð¿Ð°ÐºÐµÑÐ° ANSYS. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¿ÑÐ¾ÑÐµÐ´ÑÑÑ ÑÐµÑÐµÐ½Ð¸Ñ Ð·Ð°Ð´Ð°Ñ ÑÐ¿ÑÑÐ³Ð¾Ð¹ ÑÑÐ°ÑÐ¸ÐºÐ¸, ÑÐµÐ¿Ð»Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¾ÑÑÐ¸ Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ ÑÐ¾Ð±ÑÑÐ²ÐµÐ½Ð½ÑÑ ÑÐ°ÑÑÐ¾Ñ ÐºÐ¾Ð»ÐµÐ±Ð°Ð½Ð¸Ð¹ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸. ÐÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ Ð¿ÑÐµÐ¿Ð¾Ð´Ð°Ð²Ð°ÑÐµÐ»ÐµÐ¹ Ð¸ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð², Ð²ÐµÐ´ÑÑÐ¸Ñ Ð¸ Ð²ÑÐ¿Ð¾Ð»Ð½ÑÑÑÐ¸Ñ Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½ÑÐµ ÑÐ°Ð±Ð¾ÑÑ Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð»Ð°Ð±Ð¾ÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð¿ÑÐ°ÐºÑÐ¸ÐºÑÐ¼Ð° Ð¿Ð¾ Ð´Ð¸ÑÑÐ¸Ð¿Ð»Ð¸Ð½Ðµ Â«ÐÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ Ð¼ÐµÑÐ°Ð½Ð¸ÐºÐ°Â». Ð¢Ð°ÐºÐ¶Ðµ Ð¼Ð¾Ð¶ÐµÑ Ð±ÑÑÑ Ð¿Ð¾Ð»ÐµÐ·Ð½Ð¾ Ð´Ð»Ñ Ð»Ð¸Ñ, ÑÐ°Ð¼Ð¾ÑÑÐ¾ÑÑÐµÐ»ÑÐ½Ð¾ Ð¾ÑÐ²Ð°Ð¸Ð²Ð°ÑÑÐ¸Ñ CAE ÑÐ¸ÑÑÐµÐ¼Ñ ANSYS.
description: The manual presents laboratory works that reveal the basics of using CAE systems for the calculation of mechanical structures. The presentation is based on the base of using the CAE system ANSYS. The procedures for solving the problems of elastic statics, thermal conductivity and determining of the eigen frequencies of solid structures are considered. It is intended for teachers and students, which are involved in laboratory works in the framework of a laboratory workshop in the discipline âComputational
Mechanicsâ. Also, it can be useful for the people who are learning ANSYS CAE system by their selves.
A Note on the Trandermal Delivery of Clenbuterol
Creators: name: Göpferich, Achim
name: Lee, Geoffrey
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: A modified diffusion/compartmental model has been used to simulate the transdermal uptake of clenbuterol from a matrix-type delivery device. The application of a fresh device every 7 days was found to produce a pseudo-steady state drug plasma profile after approx. three changes of device. Of the matrix properties, only drug loading had substantial effect on the drug plasma profile.
Ruderman-Kittel-Kasuya-Yosida spin density oscillations: impact of the finite radius of the exchange interaction
Creators: name: Smirnov, Sergey
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: Ruderman-Kittel-Kasuya-Yosida indirect exchange effect, mesoscopic ring
subject: 530 Physik
subject: 75.20.Hr
subject: 75.75.+a
subject: 71.10.-w

description: A non-interacting electron gas on a one-dimensional ring is considered at finite temperatures. The localized spin is embedded at some point on the ring and it is assumed that the interaction between this spin and the electrons is the exchange interaction being the basis of the Ruderman-Kittel-Kasuya-Yosida indirect exchange effect. When the number of electrons is large enough, it turns out that any small but finite interaction radius value can always produce an essential change of the spin density oscillations in comparison with the zero interaction radius traditionally used to model the Ruderman-Kittel-Kasuya-Yosida effect.
MONK in Practice: Indexing Heterogeneous Handwritten Collections
Creators: name: Caceres, Anna
name: Weber, Andreas
name: Schomaker, Lambert
Publisher: name: Zenodo
Year: 2020
Subjects: handwriting recognition
user study
heterogeneous archives
archives
active learning
Prize papers
machine learning

description: This paper and presentation describes an attempt to index British historical archive the Prize Papers using a Handwriting Recognition Technology (HRT) known as MONK which was developed at the University of Groningen. As part of these efforts we organised a 'labelathon' event which brought together 14 expert volunteers for five hours of labelling. The presentation details how we prepared the archive to ensure that labelling activities had an indexation focus, before describing the outcome of this event.
Mandelstam cuts and light-like Wilson loops in N=4 SUSY
Creators: name: Lipatov, L. N.
name: Prygarin, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform an analytic continuation of the two-loop remainder function for the six-point planar MHV amplitude in N=4 SUSY, found by Goncharov, Spradlin, Vergu and Volovich from the light-like Wilson loop representation. The remainder function is continued into a physical region, where all but two energy invariants are negative. It turns out to be pure imaginary in the multi-Regge kinematics, which is in an agreement with the predictions based on the Steinmann relations for the Regge poles and Mandelstam cut contributions. The leading term reproduces correctly the expression calculated by one of the authors in the BFKL approach, while the subleading term presents a result, that was not yet found with the use of the unitarity techniques. This supports the applicability of the Wilson loop approach to the planar MHV amplitudes in N=4 SUSY.
description: 11 pages, 4 figures
Spin-boson dynamics beyond conventional perturbation theories
Creators: name: Nesi, Francesco
name: Paladino, Elisabetta
name: Thorwart, Michael
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: boson systems, master equation, perturbation theory, tunnelling
subject: 530 Physik

description: A generalized approximation scheme is proposed to describe the dynamics of the spin-boson problem. Being nonperturbative in the coupling strength nor in the tunneling frequency, it gives reliable results over a wide regime of temperatures and coupling strength to the thermal environment for a large class of bath spectral densities. We use a path-integral approach and start from the exact solution for the two-level system population difference in the form of a generalized master equation (GME). Then, we approximate interblip and blip-sojourn interactions up to linear order, while retaining all intrablip correlations to find the kernels entering the GME in analytical form. Our approximation scheme, which we call weakly interacting blip approximation, fully agrees with conventional perturbative approximations in the tunneling matrix element (noninteracting-blip approximation) or in the system-bath coupling strength in the proper parameter regime.
Transport properties of double-walled carbon nanotube quantum dots
Creators: name: Wang, Shidong
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: carbon nanotubes, Coulomb blockade, excited states, Liouville equation, quantum dots
subject: 530 Physik

description: The transport properties of quantum dot (QD) systems based on double-walled carbon nanotubes (DWCNTs) are investigated. The interplay between microscopic structure and strong Coulomb interaction is treated within a bosonization framework. The linear and nonlinear current-voltage characteristics of the QD system are calculated by starting from the Liouville equation for the reduced density matrix. Depending on the intershell couplings, an eight-electron periodicity of the Coulomb blockade peak spacing in the case of commensurate DWCNT QDs and a four-electron periodicity in the incommensurate case are predicted. The contribution of excited states of DWCNTs to the nonlinear transport is investigated as well.
The influence of endogenous surfactant on the structure and drug-release properties of Eudragit NE30D-matrixes
Creators: name: Göpferich, Achim
name: Lee, Geoffrey
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: Polyacrylate polymer; Surfactant; Diffusion
subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: The influence of an endogenous surfactant present in Eudragit NE30D on the structure and drug release (clenbuterol) properties of thin matrices has been examined. Both drug-free and drug-loaded matrices were found to be non-isotropic in structure, the former having a marbled appearance under the polarising light microscope, and the latter showing numerous needle-shaped crystals. At loading above approx. 10% w/w clenbuterol it was also possible to observe aggregates of the drug. Differential scanning calorimetry enabled the identification of melting peaks at approx. 50°C for the needle-shaped crystals and approx. 80°C for the larger drug aggregates. The former are composed of a surfactant used by the manufacturer for the synthesis of Eudragit NE30D by emulsion polymerization. This surfactant undergoes a phase separation from the polymer on storage at room temperature. It could, however, be extracted from the polymer by refluxing in water to yield an isotropic system. The extract showed a melting peak at 50°C and also UV, IR, NMR, and mass spectra in accordance with an o-substituted nonyl phenol surfactant. Matrices prepared from the purified Eudragit NE30D showed drug release rates of only one third the magnitude of those found with matrices prepared from the raw polymer. Substantially reduced scatter in the release data was also found with the purified polymer.
Excitable Delaunay triangulations
Creators: name: Adamatzky, Andrew
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences
subject: B.6.1; C.2.1; F.1.1; G.2.2
subject: 37B15, 68Q80, 35B36, 92B20

description: In an excitable Delaunay triangulation every node takes three states (resting, excited and refractory) and updates its state in discrete time depending on a ratio of excited neighbours. All nodes update their states in parallel. By varying excitability of nodes we produce a range of phenomena, including reflection of excitation wave from edge of triangulation, backfire of excitation, branching clusters of excitation and localized excitation domains. Our findings contribute to studies of propagating perturbations and waves in non-crystalline substrates.
Screening in YBCO at large wave vectors
Creators: name: Huotari, Simo
name: Soininen, J. Aleksi
name: Vankó, György
name: Monaco, Giulio
name: Olevano, Valerio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present experimental inelastic x-ray scattering (IXS) and ab initio time-dependent density-functional-theory (TDDFT) studies of YBa2Cu3O7-δ. The response of the low-lying Ba 5p and Y 4p core electrons is shown to interact strongly with the Cu 3d and O 2p excitations, with important consequences on screening. The agreement between IXS and TDDFT results is excellent, apart from a new type of excitations, mainly related to loosely bound Ba electrons and significantly affected by correlations. This points to correlation mechanisms not fully described by TDDFT that might have a role in giving rise to antiscreening.
description: 6 pages, 3 figures
Effects of episodic sediment supply on channel adjustment of an experimental gravel bed
Creators: name: Elgueta Astaburuaga, Maria A.
Publisher: name: University of British Columbia
Year: 2018

description: A flume experiment was conducted to study channel adjustment of gravel beds to episodic sediment supply. The bed and sediment feed included grains 0.5–64 mm with geometric mean size 5.7 mm. Flow discharge was constant and every 40 h, 300 kg of sediment was supplied through different feed regimes. Sediment transport and storage, bed slope, and bed surface texture responded to sediment supply regime. The preferential storage of grains > 8 mm caused a cumulative increase in bed slope, which probably increased transport efficiency. Within a run, sediment transport rate qb and bed-surface texture were controlled by the magnitude and frequency of sediment feed and not the total mass. Constant feed promoted gradual increases in qb and small changes in bed surface texture, whereas large infrequent sediment pulses caused pronounced increases in qb and strong surface fining, followed by monotonic decreases in qb as surface re-coarsened. Pronounced trends caused stronger memory in bedload time series for runs with episodic feed than in those for runs with constant feed, although within each run, the structure of memory varied. Long memory was observed for periods when bedload rate was nearly stable, which indicates that it could result from local changes in storage. Patterns of grain-size dependence were not affected by sediment feed and the limit for full-mobility was stable around 8 mm. Scaling statistics for total bedload were similar to those for fine gravel, which was fully-mobile and dominated bedload. A decrease in the frequency of movement with size for gravel fractions caused a reduction in the memory strength of fractional bedload signals. Size-selective transport promoted the storage of coarse grains upstream and downstream fining on the bed surface. Although fully-mobile, more than 60% of the sand fed got stored in the bed, probably because of its high potential to infiltrate and get caught within larger grains. Memory was weaker for sand bedload rates than for fine gravel, which indicates that sand mobility was more influenced by short-term stochastic dynamics (e.g., clustering) and less affected by long-term processes like the evolution of large bedforms and sediment pulses.
Non-perturbative QEG Corrections to the Yang-Mills Beta Function
Creators: name: Daum, J. -E.
name: Harst, U.
name: Reuter, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the non-perturbative renormalization group evolution of the gauge coupling constant by using a truncated form of the functional flow equation for the effective average action of the Yang-Mills-gravity system. Our result is consistent with the conjecture that Quantum Einstein Gravity (QEG) is asymptotically safe and has a vanishing gauge coupling constant at the non-trivial fixed point.
description: To appear in the proceedings of CORFU 2009
Quantum Brownian motion in ratchet potentials: duality relation and its consequences
Creators: name: Peguiron, J.
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik

description: Quantum Brownian motion in ratchet potentials is investigated by means of an approach based on a duality relation. This relation links the long-time dynamics in a tilted ratchet potential in the presence of dissipation with the one in a driven dissipative tight-binding model. The application to quantum ratchet yields a simple expression for the ratchet current in terms of the transition rates in the tight-binding system.
Anomalous diffusion and elastic mean free path in disorder-free multiwalled carbon nanotubes
Creators: name: Wang, Shidong
name: Grifoni, Milena
name: Roche, S.
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: diffusion, carrier mean free path, carbon nanotubes, chirality, electronic density of states, ballistic transport
subject: 530 Physik

description: We explore the nature of anomalous conduction of wave packets in disorder-free incommensurate multiwalled carbon nanotubes. The spectrum-averaged diffusion exponent is obtained by calculating the multifractal dimension of the energy spectrum. Depending on the shell chirality, the exponent is found to lie within the range 1/2<=eta<1. For large unit-cell mismatch between incommensurate shells, eta approaches the value 1/2 for diffusive motion. The energy-dependent quantum spreading reveals a complex density-of-states-dependent pattern with ballistic, superdiffusive, or diffusive character.
Transport through a double-quantum-dot system with noncollinearly polarized leads
Creators: name: Hornberger, R. P.
name: Koller, S.
name: Begemann, G.
name: Donarini, Andrea
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: magnetisation, quantum dots, spin polarised transport, tunnelling magnetoresistance
subject: 530 Physik

description: We investigate linear and nonlinear transport in a double quantum dot system weakly coupled to spin-polarized leads. In the linear regime, the conductance as well as the nonequilibrium spin accumulation are evaluated in analytic form. The conductance as a function of the gate voltage exhibits four peaks of different heights with mirror symmetry with respect to the charge neutrality point. As the polarization angle is varied, due to exchange effects, the position and shape of the peaks change in a characteristic way, which preserves the electron-hole symmetry of the problem. In the nonlinear regime, various spin-blockade effects are observed. Moreover, negative differential conductance features occur for noncollinear magnetizations of the leads. In the considered sequential tunneling limit, the tunneling magnetoresistance (TMR) is always positive with a characteristic gate voltage dependence for noncollinear magnetization. If a magnetic field is added to the system, the TMR can become negative.
The spectrum of interacting metallic carbon nanotubes: exchange effects and universality
Creators: name: Mayrhofer, Leonhard
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: electrical conductivity, molecular electronics, organic semiconductors, single electron transistors
subject: 530 Physik

description: The interplay between Coulomb interaction and orbital symmetry produces specific transport characteristics in molecular single electron transistors (SETs) that can be considered as the fingerprints of the contacted molecule. Specifically we predict, for a benzene SET, selective conductance suppression and the appearance of negative differential conductance when changing the contacts from para to meta configuration. Both effects originate from destructive interference in transport involving states with orbital degeneracy.
Comment on "Breakdown of Bohr's correspondence principle"
Creators: name: Eltschka, Christopher
name: Friedrich, Harald
name: Moritz, Michael J.
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: semiclassics, WKB, correspondence principle
subject: 530 Physik
subject: 03.65.-w, 31.15.Gy, 33.20.Tp

description: A Comment on the Letter by Bo Gao, Phys. Rev. Lett. 83, 4225 (1999)
Gravitationally lensed QSOs in the ISSIS/WSO-UV era
Creators: name: Goicoechea, Luis J.
name: Shalyapin, Vyacheslav N.
name: Gil-Merino, Rodrigo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gravitationally lensed QSOs (GLQs) at redshift z = 1-2 play a key role in understanding the cosmic evolution of the innermost parts of active galaxies (black holes, accretion disks, coronas and internal jets), as well as the structure of galaxies at intermediate redshifts. With respect to studies of normal QSOs, GLQ programmes have several advantages. For example, a monitoring of GLQs may lead to unambiguous detections of intrinsic and extrinsic variations. Both kinds of variations can be used to discuss central engines in distant QSOs, and mass distributions and compositions of lensing galaxies. In this context, UV data are of particular interest, since they correspond to emissions from the immediate surroundings of the supermassive black hole. We describe some observation strategies to analyse optically bright GLQs at z of about 1.5, using ISSIS (CfS) on board World Space Observatory-Ultraviolet.
description: 7 pages, 4 figures, Accepted for publication in Astrophysics & Space Science
Emmanuel Mounier's Singular and Relational Person: A Communitarian Personalist Understanding of Personhood
Creators: name: Gilmore, Luke Joseph Guimond Meszaros
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: personalism
Emmanuel Mounier
liberalism
personhood
communitarian

description: This project focusses on the idea of how the person as developed by Emmanuel Mounier (1905-1950) is a departure from a common understanding of the person. Mounier's concept of the person is simultaneously singular and relational. Furthermore, the person is a spiritual being who represents the highest form of humanity that one can become. The idea of the person contains liberal and communitarian elements: the person understands herself as a unique subject whilst ontologically requiring the other to fully flourish as a person. It is incoherent for the person to conceive of herself as fundamentally separate of the other, which is why the person joins with the other to form a nous. This draws a stark line between Mounier and liberal individualist thought that conceives of the person as an isolated subject. The liberal element of Mounier's thought is that the state protects the person and her communities against actions that impinge upon the person's fundamental rights so that the person can maximise her freedom to flourish. Moreover, the institutions that form the personalist state are inspired by liberal thought. This means that Mounier's project begins from a communitarian standpoint and finishes by offering a liberal communitarianism. -- Ce projet se concentre sur l'idée de la personne qu'a développée Emmanuel Mounier (1905-1950) et comment elle dévie d'une compréhension courante de la personne. Le concept de la personne de Mounier est simultanément singulier et relationnel. De plus, la personne est un être spirituel qui représente la plus honte forme de l'humanité que l'on pourrait devenir. Cette idée de la personne comprend des éléments libéraux et communautaires : la personne se perçoit comme un sujet unique alors qu'elle requiert ontologiquement autrui, afin de s'épanouir en tant que personne. Il est incohérent que la personne se conçoive comme être fondamentalement séparé d'autrui, ce qui est pourquoi la personne se joint à autrui pour qu'ils forment un nous. Cela établit une distinction nette entre Mounier et la pensée individualiste libérale qui conçoit de la personne comme un sujet isolé. L'élément libéral de la pensée de Mounier est que l'État protège la personne et ses communautés contre des infractions contre ses droits fondamentaux, afin que la personne puisse maximiser sa liberté de s'épanouir. En outre, les institutions qui forment l'État personnaliste s'inspirent de la pensée libérale. Cela veut dire que le projet de Mounier commence d'une perspective communautaire et se termine en proposant un communautarisme libéral.
Improved in vitro methods for differentiating induced pluripotent stem cells to cardiomyocytes
Creators: name: Chu, Jun Ming Axel
Publisher: name: University of British Columbia
Year: 2018

description: Human adult cardiomyocytes are hard to obtain and difficult to culture. This has led to patient-specific induced pluripotent stem (iPS) cell-derived cardiomyocytes (iCMs) becoming an attractive alternative, serving as a platform for cardiovascular disease modeling, drug toxicity screening, regenerative therapies, and the understanding of human physiology. Unfortunately, current protocols of generating iCMs remain unpredictable, yielding cellular subtypes (ventricular, atrial, nodal cells, cardiac fibroblasts and others) that vary in proportion and levels of maturity, depending primarily on the methodology employed. This led to the scope of my research, which was to understand the minimal biological and physical parameters governing cardiac differentiation from iPS cells, so as to improve current cardiac differentiation systems. My experiments into the effects of substrate stiffness on differentiation revealed that cardiac maturity could be accelerated for iPS cells differentiated on hard substrates (~1.72MPa) compared to cells differentiated on soft (~5kPa) or intermediate (~130kPa) substrates. Experiments investigating the effects of topography also showed that freshly differentiated iCMs could be directed to form uniaxial contracting cardiac tissues by seeding them into millimeter-sized linear grooved channels. Finally, proof-of-principle experiments into inductive co-cultures revealed that previously differentiated iCMs co-cultivated with iPS cells constituted a sufficient stimulatory system to induce cardiac differentiation – as determined by the exhibition of spontaneous self-contractions, expression of cardiac specific markers, and structural organization of sarcomeres. This process was achieved without the exogenous addition of pathway inhibitors and morphogens, suggesting that ‘older’ iCMs serves as an adequate stimulatory source capable of recapitulating the necessary culture environment for cardiac differentiation.
Asymmetric Heating of the HR 4796A Dust Ring Due to Pericenter Glow
Creators: name: Moerchen, Margaret
name: Churcher, Laura
name: Telesco, Charles
name: Wyatt, Mark
name: Fisher, R. Scott
name: Packham, Christopher
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have obtained new resolved images of the well-studied HR 4796A dust ring at 18 and 25 microns with the 8-meter Gemini telescopes. These images confirm the previously observed spatial extent seen in mid-IR, near-IR, and optical images of the source. We detect brightness and temperature asymmetries such that dust on the NE side is both brighter and warmer than dust in the SW. We show that models of so-called pericenter glow account for these asymmetries, thus both confirming and extending our previous analyses. In this scenario, the center of the dust ring is offset from the star due to gravitational perturbations of a body with an eccentric orbit that has induced a forced eccentricity on the dust particle orbits. Models with 2-micron silicate dust particles and a forced eccentricity of 0.06 simultaneously fit the observations at both wavelengths. We also show that parameters used to characterize the thermal-emission properties of the disk can also account for the disk asymmetry observed in shorter-wavelength scattered-light images.
description: accepted for publication in A&A; 7 pages, 4 figures
Long-Term Variations in the Growth and Decay Rates of Sunspot Groups
Creators: name: Javaraiah, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the combined Greenwich (1874-1976) and Solar Optical Observatories Network (1977-2009) data on sunspot groups, we study the long-term variations in the mean daily rates of growth and decay of sunspot groups. We find that the minimum and the maximum values of the annually averaged daily mean growth rates are ~52% per day and ~183% per day, respectively, whereas the corresponding values of the annually averaged daily mean decay rates are ~21% per day and ~44% per day, respectively. The average value (over the period 1874-2009) of the growth rate is about 70% more than that of the decay rate. The growth and the decay rates vary by about 35% and 13%, respectively, on a 60-year time-scale. From the beginning of Cycle 23 the growth rate is substantially decreased and near the end (2007-2008) the growth rate is lowest in the past about 100 years.
description: 1 table, 13 figures, accepted by Solar Physics
An intrinsic characterization of 2+2 warped spacetimes
Creators: name: Ferrando, Joan Josep
name: Sáez, Juan Antonio
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give several equivalent conditions that characterize the 2+2 warped spacetimes: imposing the existence of a Killing-Yano tensor $A$ subject to complementary algebraic restrictions; in terms of the projector $v$ (or of the canonical 2-form $U$) associated with the 2-planes of the warped product. These planes are principal planes of the Weyl and/or Ricci tensors and can be explicitly obtained from them. Therefore, we obtain the necessary and sufficient (local) conditions for a metric tensor to be a 2+2 warped product. These conditions exclusively involve explicit concomitants of the Riemann tensor. We present a similar analysis for the conformally 2+2 product spacetimes and give an invariant classification of them. The warped products correspond to two of these invariant classes. The more degenerate class is the set of product metrics which are also studied from an invariant point of view.
description: 18 pages; submitted to Class. Quantum Grav.
Orbital effects of tunneling anisotropic magnetoresistance in Fe/GaAs/Au junctions
Creators: name: Wimmer, Michael
name: Lobenhofer, M.
name: Moser, Jürgen
name: Matos-Abiague, Alex
name: Schuh, Dieter
name: Wegscheider, Werner
name: Fabian, Jaroslav
name: Richter, Klaus
name: Weiss, Dieter
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 530 Physik
subject: 72.25.Dc
subject: 75.47.-m

description: We report experiments on epitaxially grown Fe/GaAs/Au tunnel junctions demonstrating that the tunneling anisotropic magnetoresistance (TAMR) effect can be controlled by a magnetic field. Theoretical modelling shows that the interplay of the orbital effects of a magnetic field and the Dresselhaus spin-orbit coupling in the GaAs barrier leads to an independent contribution to the TAMR effect with uniaxial symmetry, whereas the Bychkov-Rashba spin-orbit coupling does not play a role. The effect is intrinsic to barriers with bulk inversion asymmetry
Giant magnons and non-maximal giant gravitons
Creators: name: Ciavarella, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We produce the open strings on $\mathbb{R}\times S^{2}$ that correspond to the solutions of integrable boundary sine-Gordon theory by making use of the $N$-magnon solutions provided in \cite{KPV} together with explicit moduli. Relating the two boundary parameters in a special way we describe the scattering of giant magnons with non-maximal $Y=0$ giant gravitons and calculate the leading contribution to the associated magnon scattering phase.
description: 34 pages, 8 figures
The 3-dimensional planar assignment problem and the number of Latin squares related to an autotopism
Creators: name: Falcón, R. M.
name: Martín-Morales, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B15, 20N05

description: There exists a bijection between the set of Latin squares of order $n$ and the set of feasible solutions of the 3-dimensional planar assignment problem ($3PAP_n$). In this paper, we prove that, given a Latin square isotopism $Θ$, we can add some linear constraints to the $3PAP_n$ in order to obtain a 1-1 correspondence between the new set of feasible solutions and the set of Latin squares of order $n$ having $Θ$ in their autotopism group. Moreover, we use Gröbner bases in order to describe an algorithm that allows one to obtain the cardinal of both sets.
description: 4 pages, 1 table
Extending Role-based Access Control for Business Usage
Creators: name: Klarl, Heiko
name: Molitorisz, Korbinian
name: Emig, Christian
name: Klinger, Karsten
name: Abeck, Sebastian
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: RBAC, Roles, Business Process Modelling, Identity Management, Access Control, Business-IT Alignment
subject: 004 Informatik
subject: D.2.0
subject: D.2.1
subject: D.2.2
subject: K.6.3
subject: K.6.5

description: Role-based access control (RBAC) is used for managing authorisation in IT systems, by utilising the concept of roles. Existing approaches do not clearly define the term "role" in its different contexts as well as not considering the relation between roles and business process modelling. Therefore this work introduces business and system role-based access control (B&S-RBAC). Established role-based access control models are extended with a business perspective and the term role is defined from a business and from an IT perspective, resulting in business and system roles. The relation between them is shown in a meta-model and the usage of business roles for secure business process modelling is explained.
Soziale Ungleichheit und Diabetes mellitus – zeitliche Entwicklung bei Erwachsenen in Deutschland
Creators: name: Heidemann, Christin
name: Du, Yong
name: Baumert, Jens
name: Paprott, Rebecca
name: Lampert, Thomas
name: Scheidt-Nave, Christa
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: DIABETES MELLITUS
subject: BILDUNG
subject: PRÄVALENZ
subject: DIABETESRISIKO
subject: VERSORGUNG
subject: 610 Medizin und Gesundheit

description: Ein Zusammenhang von sozialer Benachteiligung mit dem Vorliegen eines bekannten Diabetes und einzelner Risikofaktoren ist gut belegt. Der Artikel fasst Ergebnisse der Untersuchungssurveys des Robert Koch-Instituts der Zeiträume 1997 bis 1999 und 2008 bis 2011 zusammen, um die soziale Ungleichheit – operationalisiert über den Bildungsstatus – hinsichtlich der Prävalenzen des bekannten und unerkannten Diabetes, des Erkrankungsrisikos und der Versorgung des Diabetes sowie deren zeitlicher Entwicklung zu untersuchen. Für beide Surveyzeiträume zeigen sich in der unteren Bildungsgruppe höhere Prävalenzen des bekannten und unerkannten Diabetes sowie ein höheres 5-Jahres-Diabetesrisiko im Vergleich zur mittleren und oberen Bildungsgruppe. Im Zeitverlauf sind für alle Bildungsgruppen in der Tendenz ein Prävalenzanstieg des bekannten Diabetes und eine Prävalenzabnahme des unerkannten Diabetes zu beobachten. Für das 5-Jahres- Diabetesrisiko ist im Zeitverlauf nur für die obere Bildungsgruppe eine deutliche Abnahme ersichtlich. Für die ausgewählten Versorgungsindikatoren lassen sich insgesamt keine ausgeprägten Bildungsunterschiede und im Zeitverlauf eine Verbesserung erkennen. Für einige Versorgungsindikatoren (Fußuntersuchung, Statine) beschränkt sich die Verbesserung auf die untere Bildungsgruppe. Schlussfolgernd besteht in Deutschland weiterhin soziale Ungleichheit in der Prävalenz des bekannten und unerkannten Diabetes sowie im Diabetesrisiko, jedoch ist kein deutlicher Bildungsgradient für die Versorgungsindikatoren zu beobachten. Über die Zeit hat sich die Ungleichheit in der Diabetesprävalenz nicht weiter verschärft, hinsichtlich des Diabetesrisikos jedoch leicht vergrößert. Für einzelne Versorgungsindikatoren beschränken sich Verbesserungen auf bestimmte Bildungsgruppen.
Threshold properties of attractive and repulsive 1/r^2 potentials
Creators: name: Moritz, Michael J.
name: Eltschka, Christopher
name: Friedrich, Harald
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: semiclassics, WKB, bound states, tunneling
subject: 530 Physik
subject: 03.65.Ge

description: We study the near-threshold (E-->0) behavior of quantum systems described by an attractive or repulsive 1/r^2 potential in conjunction with a shorter-ranged 1/r^m (m>2) term in the potential tail. For an attractive 1/r^2 potential supporting an infinite dipole series of bound states, we derive an explicit expression for the threshold value of the pre-exponential factor determining the absolute positions of the bound-state energies. For potentials consisting entirely of the attractive 1/r^2 term and a repulsive 1/r^m term, the exact expression for this prefactor is given analytically. For a potential barrier formed by a repulsive 1/r^2 term (e.g., the centrifugal potential) and an attractive 1/r^m term, we derive the leading near-threshold behavior of the transmission probability through the barrier analytically. The conventional treatment based on the WKB formula for the tunneling probability and the Langer modification of the potential yields the right energy dependence, but the absolute values of the near-threshold transmission probabilities are overestimated by a factor which depends on the strength of the 1/r^2 term (i.e., on the angular momentum quantum number l) and on the power m of the shorter ranged 1/r^m term. We derive a lower bound for this factor. It approaches unity for large l, but it can become arbitrarily large for fixed l and large values of m. For the realistic example l = 1 and m = 6, the conventional WKB treatment overestimates the exact near-threshold transmission probabilities by at least 38%.