cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metalloproteinases and their Inhibitors under the Course of Immunostimulation by CPG-ODN and Specific Antigen Inhalation in Equine Asthma
Creators: name: Barton, Ann Kristin
name: Shety, Tarek
name: Klier, John
name: Geis, Sabine
name: Einspanier, Ralf
name: Gehlen, Heidrun
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: metalloproteinases
subject: equine asthma
subject: immunostimulation
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::616 Krankheiten
subject: 500 Naturwissenschaften und Mathematik::590 Tiere (Zoologie)::599 Mammalia (Säugetiere)

description: Objectives. Inhalation of immunostimulatory bacterial DNA segments (cytosine-phosphate-guanosine-oligodeoxynucleotides, CpG-ODN) normalizes clinical and cytologic parameters in severe equine asthma. We hypothesized that CpG-ODN inhalation also reduces the misbalance of elastinolytic activity in asthmatic horses. Methods. Twenty asthmatic horses diagnosed by clinical examinations using a scoring system were included. All horses inhaled CpG-ODNs for 14 days in 2-day intervals. Matrix metalloproteinase (MMP-2/-9) and tissue inhibitors of metalloproteinase (TIMP-1/-2) concentrations were measured in tracheal aspirates using equine sandwich ELISAs before and 2 and 6 weeks after CpG-ODN inhalation. Results. MMP and TIMP concentrations correlated with the results of clinical scoring in all stages of equine asthma. Inhalation therapy led to significant reductions in clinical scores. MMP-2, MMP-9, and TIMP-2 concentrations were significantly reduced immediately, and all MMP and TIMP concentrations 6 weeks after therapy. Discussion. In equine asthma, overexpression of MMPs contributes to pathological tissue destruction, while TIMPs counteract MMPs with overexpression leading to fibrosis formation. The results of this study show that CpG-ODN inhalation may be an effective therapy to address a misbalance in equine asthma. Conclusions. Misbalance of elastinolytic activity seems to improve by CpG-ODN inhalation for at least 6 weeks posttherapy, which may reduce the remodeling of the extracellular matrix. Further studies should evaluate this effect in comparison to glucocorticoid inhalation therapy. Significance. CpG-ODN inhalation may be an effective therapy in the prevention of pulmonary fibrosis formation in equine asthma.
Projected Entangled Pair States at Finite Temperature: Imaginary Time Evolution with Ancillas
Creators: name: Czarnik, Piotr
name: Cincio, Lukasz
name: Dziarmaga, Jacek
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A projected entangled pair state (PEPS) with ancillas is evolved in imaginary time. This tensor network represents a thermal state of a 2D lattice quantum system. A finite temperature phase diagram of the 2D quantum Ising model in a transverse field is obtained as a benchmark application.
description: 7 pages, 9 figures; version accepted to publication in Phys. Rev. B; added new numerical results and references
Peptide‐mediated surface coatings for the release of wound‐healing cytokines
Creators: name: Clauder, Franziska
name: Möller, Stephanie
name: Köhling, Sebastian
name: Bellmann-Sickert, Kathrin
name: Rademann, Jörg
name: Schnabelrauch, Matthias
name: Beck-Sickinger, Annette G.
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: cell migration
subject: DOPA
subject: drug delivery system
subject: heparin
subject: surface-coated materials
subject: wound healing
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Supporting the wound healing process by sending the appropriate cytokine signals can shorten healing time and overcome chronic inflammation syndromes. Even though adhesion peptides consisting of Arg-Gly-Asp (RGD) are commonly used to enhance cell-surface interactions, peptide-mediated cytokine delivery has not been widely exploited so far. Cytokines interact with high affinity with their cognitive receptors but also with sulfated glycosaminoglycans (GAGs), both of which form a base for incorporation of cytokines into functional biomaterials. Here, we report on a mussel-derived surface coating as a prospective cytokine delivery system using covalently bound heparin mimetics, receptor-derived chemokine-binding peptides, and heparin-binding peptides (HBP). The latter enabled non-covalent immobilization of heparin on the surface followed by chemokine binding and release, whereas the former allowed direct non-covalent chemokine immobilization. The peptide displayed excellent binding to custom-made polystyrene 96-well plates, enabling convenient testing of several compounds. Released chemokine successfully induced migration in Jurkat cells, especially for the non-covalent heparin immobilization approach using HBPs as evaluated in a transwell assay. In comparison, heparin-mimetic coatings, comprised of sulfated peptides and GAG derivatives, proved less efficient with respect to amount of immobilized chemokine and migratory response. Thus, our study provides a roadmap for further rational optimization and translation into clinics.
Stimmen aus Ravensbrück – Gedichte aus dem Frauenkonzentrationslager
Creators: name: Binder, Pat
Publisher: name: querelles-net
Year: 2000
Subjects: Literatur; Bildende Kunst; Nationalsozialismus; Antisemitismus; Widerstand; Geschlecht; Gender

description: querelles-net, Nr. 2 (2000): Nationalsozialismus und Antisemitismus
Alternating domains with uniaxial and biaxial magnetic anisotropy in epitaxial Fe films on BaTiO3
Creators: name: Lahtinen, Tuomas H. E.
name: Shirahata, Yasuhiro
name: Yao, Lide
name: Franke, Kévin J. A.
name: Venkataiah, Gorige
name: Taniyama, Tomoyasu
name: van Dijken, Sebastiaan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on domain formation and magnetization reversal in epitaxial Fe films on ferroelectric BaTiO3 substrates with ferroelastic a-c stripe domains. The Fe films exhibit biaxial magnetic anisotropy on top of c domains with out-of-plane polarization, whereas the in-plane lattice elongation of a domains induces uniaxial magnetoelastic anisotropy via inverse magnetostriction. The strong modulation of magnetic anisotropy symmetry results in full imprinting of the a-c domain pattern in the Fe films. Exchange and magnetostatic interactions between neighboring magnetic stripes further influence magnetization reversal and pattern formation within the a and c domains.
The Ethics of Vocabulary Development and Use
Creators: name: Rovetto, Robert
Publisher: name: ARDC
Year: 2023
Subjects: Vocabularies
Terminologies
Semantic

description: The ethics of vocabulary development and use, and similar knowledge organization systems (or semantic artifacts) is introduced. It is a seldom-discussed or explored topic, but it's relevance to contemporary computational research and data sciences is made clear, the motivating case being a more complex semantic artefact (namely ontologies). Broadly construed, this project includes the ethics of metadata, of semantics, of ontology, and similar artifacts. The ongoing project aims to complete and propose a set of principles for the ethics of these systems, as well as explore and identify the potential or actual ethical and moral implications of various aspects of these artifacts. Concerns and topics from the ethics of artificial intelligence and digital ethics are relevant and inform this research and development activity, such as privacy, bias, data- sharing, machine ethics, and so on. The project and author are actively open to formal support to sustainably pursue this promising line of research. Interested parties are encouraged to make contact.References1. Rovetto, R.J. The ethics of conceptual, ontological, semantic and knowledge modeling. AI & Soc (2023). https://doi.org/10.1007/s00146-022-01563-32. Rovetto, R.J., "Ethics of Semantics" in US2TS 20223. "The Ethics of Ontology", poster presented at OntoCommons 2nd Global Workshop (June 2023).4. Rovetto, R.J., "Ethics in Ontology", (2013-present), Abstract via PhilPapers.5. Ethics of Ontology GitHub page, http://purl.org/rrovetto/ethics-of-ontology
title: Traversing fields
title: Affective continuities across Muslim and Christian settings in Berlin
titleType: Subtitle
Creators: name: Kasmani, Omar
name: Mattes, Dominik
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: affect
subject: cross-religious study
subject: fieldwork
subject: Pentecostals
subject: sensation
subject: Sufis
subject: urban context
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: This article, a reflection on collaborative fieldwork involving a Sufi Muslim and a Pentecostal Christian setting in Berlin, examines whether distinct and diverse religious groups can be brought into a meaningful relation with one another. It considers the methodological possibilities that might become possible or foreclose when two researchers, working in different prayer settings in the same city, use affect as a common frame of reference while seeking to establish shared affective relations and terrains that would otherwise be implausible. With two separately observed accounts of prayer gatherings in a shared urban context, we describe locally specific workings of affect and sensation. We argue that sense-aesthetic forms and patterns in our field sites are supralocal affective forms that help constitute an analytic relationality between the two religious settings.
G. Müller, F. Boblenz, Heinrich Luden als Parlamentarier. Ein Beitrag zur frühen Parlamentsgeschichte Sachen-Weimar-Eisenachs 1816–1832, 1998
Creators: name: Walle, Marianne
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 28 Nr. 3 (2001)
Arc diagram varieties
Creators: name: Kosakowska, Justyna
name: Schmidmeier, Markus
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14L30, 05C85, 16G20, 47A15, 68P10

description: Let $k$ be an algebraically closed field and $α$, $β$, $γ$ be partitions. An algebraic group acts on the constructible set of short exact sequences of nilpotent $k$-linear operators of Jordan types $α$, $β$, and $γ$, respectively; we are interested in the stratification given by the orbits in the case where all parts of $α$ are at most 2. Geometric properties of the degeneration relation are controlled by the combinatorics of arc diagrams. The extended bubble sort algorithm is used to construct chains of orbits such that subsequent strata have dimension difference equal to one.
Isolation and characterization of new Puumala orthohantavirus strains from Germany
Creators: name: Binder, Florian
name: Reiche, Sven
name: Roman-Sosa, Gleyder
name: Saathoff, Marion
name: Ryll, René
name: Trimpert, Jakob
name: Kunec, Dusan
name: Höper, Dirk
name: Ulrich, Rainer G.
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: puumala orthohantavirus
subject: bank vole
subject: cell culture
subject: virus adaptation
subject: glycoprotein-specific antibodies
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::616 Krankheiten

description: Orthohantaviruses are re-emerging rodent-borne pathogens distributed all over the world. Here, we report the isolation of a Puumala orthohantavirus (PUUV) strain from bank voles caught in a highly endemic region around the city Osnabrück, north-west Germany. Coding and non-coding sequences of all three segments (S, M, and L) were determined from original lung tissue, after isolation and after additional passaging in VeroE6 cells and a bank vole-derived kidney cell line. Different single amino acid substitutions were observed in the RNA-dependent RNA polymerase (RdRP) of the two stable PUUV isolates. The PUUV strain from VeroE6 cells showed a lower titer when propagated on bank vole cells compared to VeroE6 cells. Additionally, glycoprotein precursor (GPC)-derived virus-like particles of a German PUUV sequence allowed the generation of monoclonal antibodies that allowed the reliable detection of the isolated PUUV strain in the immunofluorescence assay. In conclusion, this is the first isolation of a PUUV strain from Central Europe and the generation of glycoprotein-specific monoclonal antibodies for this PUUV isolate. The obtained virus isolate and GPC-specific antibodies are instrumental tools for future reservoir host studies.
Phase transitions in neutron star and magnetars and their connection with high energetic bursts in astrophysics
Creators: name: Mallick, Ritam
name: Sahu, P. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The phase transition from normal hadronic matter to quark matter in neutron stars (NS) could give rise to several interesting phenomena. Compact stars can have such exotic states up to their surface (called strange stars (SS)) or they can have quark core surrounded by hadronic matter, known as hybrid stars (HS). As the state of matter of the resultant SS/HS is different from the initial hadronic matter, their masses also differ. Therefore, such conversion leads to huge energy release, sometimes of the order of $10^{53}$ ergs. In the present work we study the qualitative energy released by such conversion. Recent observations reveal huge surface magnetic field in certain stars, termed magnetars. Such huge magnetic fields can modify the equations of state (EOS) of the matter describing the star. Therefore, the mass of magnetars are different from normal NS. The energy released during the conversion process from neutron magnetar (NM) to strange magnetar/hybrid magnetar (SS/HS) is different from normal NS to SS/HS conversion. In this work we calculate the energy release during the phase transition in magnetars. The energy released during NS to SS/HS conversion exceeds the energy released during NM to SM/HM conversion. The energy released during the conversion of NS to SS is always of the order of $10^{53}$ ergs. The amount of energy released during such conversion can only be compared to the energy observed during the gamma ray bursts (GRB). The energy liberated during NM to HM conversion is few times lesser, and is not likely to power GRB at cosmological distances. However, the magnetars are more likely to lose their energy from the magnetic poles and can produce giant flares, which are usually associated with magnetars.
description: 14 pages, 4 figures, 4 tables
On space-like constant slope surfaces and Bertrand curves in Minkowski 3-space
Creators: name: Babaarslan, Murat
name: Yayli, Yusuf
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53B25

description: In the present paper, we define the notions of Lorentzian Sabban frames and de Sitter evolutes of the unit speed space-like curves on de Sitter 2-space $\mathbb{S}^{2}_{1}$. In addition, we investigate the invariants and geometric properties of these curves. Afterwards, we show that space-like Bertrand curves and time-like Bertrand curves can be constructed from unit speed space-like curves on de Sitter 2-space $\mathbb{S}^{2}_{1}$ and hyperbolic space $\mathbb{H}^{2}$, respectively. We obtain the relations between Bertrand curves and helices. Also we show that pseudo-spherical Darboux images of Bertrand curves are equal to pseudo-spherical evolutes in Minkowski 3-space $\mathbb{R}^{3}_{1}$. Moreover we investigate the relations between Bertrand curves and space-like constant slope surfaces in $\mathbb{R}^{3}_{1}$. Finally, we give some examples to illustrate our main results.
description: 16 pages, 4 figures. Accepted for publication in the Scientific Annals of "Al.I. Cuza" University of Iasi
Rankin--Eisenstein classes and explicit reciprocity laws
Creators: name: Kings, Guido
name: Loeffler, David
name: Zerbes, Sarah Livia
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F85, 11F67, 11G40, 14G35

description: We construct three-variable $p$-adic families of Galois cohomology classes attached to Rankin convolutions of modular forms, and prove an explicit reciprocity law relating these classes to critical values of L-functions. As a consequence, we prove finiteness results for the Selmer group of an elliptic curve twisted by a 2-dimensional odd irreducible Artin representation when the associated $L$-value does not vanish.
description: Updated Nov 2023 to add a correction (included separately at the end of the file)
State-of-the-Art Calculation of the Decay Rate of Electroweak Vacuum in Standard Model
Creators: name: Chigusa, So
name: Moroi, Takeo
name: Shoji, Yutaro
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The decay rate of the electroweak (EW) vacuum is calculated in the framework of the standard model (SM) of particle physics, using the recent progresses in the understanding of the decay rate of metastable vacuum in gauge theories. We give a manifestly gauge-invariant expression of the decay rate. We also perform a detailed numerical calculation of the decay rate. With the best-fit values of the SM parameters, we find that the decay rate of the EW vacuum per unit volume is about $10^{-577}\ {\rm Gyr^{-1}Gpc^{-3}}$; with the uncertainty in the top mass, the decay rate is estimated as $10^{-295}-10^{-1465}\ {\rm Gyr^{-1}Gpc^{-3}}$.
description: Typos are corrected. Result of updated analysis based on the 2023 PDG valus of standard-model parameters are added as Addendum
The transformations of a methylene-bridged bis-triazolium salt: a mesoionic carbene based metallocage and analogues of TCNE and NacNac
Creators: name: Stubbe, Jessica
name: Suhr, Simon
name: Beerhues, Julia
name: Nößler, Maite
name: Sarkar, Biprajit
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: n-heterocyclic carbenes
subject: electron transfer
subject: ligands synthesis
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::546 Anorganische Chemie

description: Unusual and unexpected chemical transformations often provide access to completely new types of functional molecules. We report here the synthesis of a methylene-bridged bis-triazolium salt designed as a precursor for a new bis-mesoionic carbene (MIC) ligand. The direct metalation with silver oxide led to the isolation and crystallographic characterization of a cationic tetranuclear octacarbene-silver(i) complex. During metalation the formal bis-MIC precursor undergoes significant structural changes and chemical transformations. A combined synthetic, crystallographic and (spectro-)electrochemical approach is used to elucidate the mechanistic pathway: starting from the methylene-bridged bis-triazolium salt a single deprotonation leads to a NacNac analogue, which is followed by a redox-induced radical dimerization reaction, generating a new tetra-MIC ligand coordinated to silver(i) central atoms. Decomplexation led to the isolation of the corresponding tetratriazoliumethylene, a profoundly electron-poor alkene, which is an analogue of TCNE.
Suspected autochthonous Thelazia callipaeda infection in a dog in northern Germany
Creators: name: Lebedewa, Sophia L.
name: Tkocz, Kevin
name: Clausen, Peter-Henning
name: Nijhof, Ard M.
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: Thelazia callipaeda
subject: Germany
subject: Cytochrome c oxidase I
subject: Zoonosis
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: A 12-year old Elo dog was presented with recurring symptoms of conjunctivitis in November 2019. A single whitish nematode was found upon inspection of the eye and identified as aThelazia callipaedamale. The morphological identification of the eye worm was supported by analysis of a partial cytochrome c oxidase I (cox1) gene sequence. The dog lived in Lower Saxony, northwestern Germany, and had not visited regions known to be endemic forT. callipaeda.This suggests that a local transmission cycle of this zoonotic nematode may exist in Germany.
AGT relations for sheaves on surfaces
Creators: name: Neguţ, Andrei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14J60, 14D21

description: We consider a natural generalization of the Carlsson-Okounkov Ext operator on the K-theory groups of the moduli spaces of stable sheaves on a smooth projective surface. We compute the commutation relations between the Ext operator and the action of the deformed W-algebra on K-theory, which was developed in [18]. The conclusion is that the Ext operator is closely related with a vertex operator, thus giving a mathematical incarnation of the Alday-Gaiotto-Tachikawa correspondence for a general algebraic surface.
description: typos fixed, presentation style improved
Efficacy of six disinfection methods against extended-spectrum beta-lactamase (ESBL) producing E. coli on eggshells in vitro
Creators: name: Motola, Gerzon
name: Hafez, Hafez Mohamed
name: Brüggemann-Schwarze, Sarah
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: resistant escherichia-coli
subject: hatching egg
subject: cephalosporin-resistant
subject: campylobacter spp.
subject: hydrogen-peroxide
subject: retail chicken
subject: poultry
subject: prevalence
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: The presence of extended-spectrum beta-lactamase (ESBL) producing Escherichia coli on poultry products is an important issue for veterinary and human health due to the zoonotic infection risk for producers and consumers. The present study focuses on testing the efficacy of six different disinfection methods on eggshell samples, aiming to reduce ESBL producing E. coli contamination on the hatching egg. Sterile eggshell cutouts were artificially contaminated with 10(8) cfu/ml CTX-M-1 producing E. coli and used as a carrier model to analyze the efficacy of six disinfection methods. The contaminated samples were separated into two groups; 1) contaminated and disinfected, 2) contaminated and non-disinfected. Six independent disinfection protocols were performed following product specifications and protocols. Each eggshell sample was separately crushed, and the total viable bacterial count was calculated to determine the disinfection efficacy. Five out of six tested methods (formaldehyde gassing, hydrogen peroxide + alcohol spray, essential oils spray, peracetic acid foam, and low energetic electron radiation) demonstrated a reduction or completely eliminated the initial ESBL producing E. coli contamination. One method (essential oils as cold fog) only partly reached the expected efficacy threshold (reduction of >10(2) cfu/ml) and the result differed significantly when compared to the reference method i.e. formaldehyde gassing.
$C^{1,α}$-Regularity of Quasilinear equations on the Heisenberg Group
Creators: name: Mukherjee, Shirsho
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R03, 35J62, 35J70, 35J75

description: In this article, we reproduce results of classical regularity theory of quasilinear elliptic equations in the divergence form, in the setting of Heisenberg Group. The considered cases encompass a very wide class of equations with isotropic growth conditions that are generalizations of the $p$-Laplacian type equation and also include equations with polynomial or exponential type growth. Some more general conditions have also been explored.
description: long version, corrections made
Lorentz violation, Gravity, Dissipation and Holography
Creators: name: Kiritsis, Elias
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reconsider Lorentz Violation (LV) at the fundamental level. We show that Lorentz Violation is intimately connected with gravity and that LV couplings in QFT must always be fields in a gravitational sector. Diffeomorphism invariance must be intact and the LV couplings transform as tensors under coordinate/frame changes. Therefore searching for LV is one of the most sensitive ways of looking for new physics, either new interactions or modifications of known ones. Energy dissipation/Cerenkov radiation is shown to be a generic feature of LV in QFT. A general computation is done in strongly coupled theories with gravity duals. It is shown that in scale invariant regimes, the energy dissipation rate depends non-triviallly on two characteristic exponents, the Lifshitz exponent and the hyperscaling violation exponent.
description: LateX, 51 pages, 9 figures. (v2) References and comments added. Misprints corrected
Degree growth for tame automorphisms of an affine quadric threefold
Creators: name: Dang, Nguyen-Bac
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: Dynamical Systems (math.DS)
subject: Group Theory (math.GR)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 14E07, 37H15, 37A35, 20F65,

description: In this paper, we consider the degree sequences of the tame automorphisms preserving an affine quadric threefold. Using some valuatives estimates derived from the work of Shestakov-Umirbaev and the action of this group on a CAT(0), Gromov-hyperbolic square complex constructed by Bisi-Furter-Lamy, we prove that the dynamical degrees of tame elements avoid any value strictly between 1 and 4/3. As an application, these methods allow us to characterize when the growth exponent of the degree of a random product of finitely many tame automorphisms is positive.
description: This paper is part of the author's PhD thesis
Status Quo of Progress Testing in Veterinary Medical Education and Lessons Learned
Creators: name: Herrmann, Lisa
name: Beitz-Radzio, Christina
name: Bernigau, Dora
name: Birk, Stephan
name: Ehlers, Jan P.
name: Pfeiffer-Morhenn, Birte
name: Preusche, Ingrid
name: Tipold, Andrea
name: Schaper, Elisabeth
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: E-assessment
subject: veterinary education
subject: day 1 competencies
subject: feedback instruments
subject: curriculum evaluation
subject: longitudinal testing
subject: electronic online test
subject: multiple choice question (MCQ)
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: Progress testing is an assessment tool for longitudinal measurement of increase in knowledge of a specific group, e.g., students, which is well-known in medical education. This article gives an overview of progress testing in veterinary education with a focus on the progress test of the German-speaking countries. The "progress test veterinary medicine" (PTT) was developed in 2013 as part of a project by the Competence Centre for E-Learning, Didactics and Educational Research in Veterinary Medicine-a project cooperation of all German-speaking institutes for veterinary medicine in Germany, Austria, and Switzerland. After the end of the project, the PTT was still continued at six locations, at each of the five German schools for veterinary medicine and additionally in Austria. Further changes to the PTT platform and the analysis were carried out to optimize the PTT for continuing to offer the test from 2017 to 2019. The PTT is an interdisciplinary, formative electronic online test. It is taken annually and is composed of 136 multiple-choice single best answer questions. In addition, a "don't know" option is given. The content of the PTT refers to the day 1 competencies described by the European Association of Establishments for Veterinary Education. The platform Q-Exam (R) Institutions (IQuL GmbH, Bergisch Gladbach, Germany) is used for creating and administrating the PTT questions, the review processes and organizing of the online question database. After compiling the test by means of a blueprint, the PTT file is made available at every location. After the last PTT in 2018, the link to an evaluation was sent to the students from four out of these six partner Universities. The 450 analyzed questionnaires showed that the students mainly use the PTT to compare their individual results with those of fellow students in the respective semester. To conclude our study, a checklist with our main findings for implementing progress testing was created.
Weyl's law for singular Riemannian manifolds
Creators: name: Chitour, Yacine
name: Prandi, Dario
name: Rizzi, Luca
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 47B25, 35J10, 53C21, 58J99, 35Q40, 81Q10

description: We study the asymptotic growth of the eigenvalues of the Laplace-Beltrami operator on singular Riemannian manifolds, where all geometrical invariants appearing in classical spectral asymptotics are unbounded, and the total volume can be infinite. Under suitable assumptions on the curvature blow-up, we show how the singularity influences the Weyl's asymptotics. Our main motivation comes from the construction of singular Riemannian metrics with prescribed non-classical Weyl's law. Namely, for any non-decreasing slowly varying function $\upsilon$ we construct a singular Riemannian structure whose spectrum is discrete and satisfies \[ N(λ) \sim \frac{ω_n}{(2π)^n} λ^{n/2} \upsilon(λ). \] Examples of slowly varying functions are $\logλ$, its iterations $\log_k λ= \log_{k-1}\logλ$, any rational function with positive coefficients of $\log_k λ$, and functions with non-lo\-ga\-rithmic growth such as $\exp\left((\log λ)^{α_1} \dots (\log_k λ)^{α_k} \right)$ for $α_i \in (0,1)$. A key tool in our arguments is a new quantitative estimate for the remainder of the heat trace and the Weyl's function on Riemannian manifolds, which is of independent interest.
description: 39 pages. v2: added references and examples. v3: streamlined exponsition, additional comments and remarks. Final version accepted on Journal de Math\'ematiques Pures et Appliqu\'ees
Designing MOF Nanoarchitectures for Electrochemical Water Splitting
Creators: name: Zhang, Ben
name: Zheng, Yijuan
name: Ma, Tian
name: Yang, Chengdong
name: Peng, Yifei
name: Zhou, Zhihao
name: Zhou, Mi
name: Li, Shuang
name: Wang, Yinghan
name: Cheng, Chong
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: electrocatalytic nanostructures and electrocatalysts
subject: hydrogen evolution reaction
subject: metal-organic frameworks
subject: organic frameworks
subject: oxygen evolution
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Electrochemical water splitting has attracted significant attention as a key pathway for the development of renewable energy systems. Fabricating efficient electrocatalysts for these processes is intensely desired to reduce their overpotentials and facilitate practical applications. Recently, metal-organic framework (MOF) nanoarchitectures featuring ultrahigh surface areas, tunable nanostructures, and excellent porosities have emerged as promising materials for the development of highly active catalysts for electrochemical water splitting. Herein, the most pivotal advances in recent research on engineering MOF nanoarchitectures for efficient electrochemical water splitting are presented. First, the design of catalytic centers for MOF-based/derived electrocatalysts is summarized and compared from the aspects of chemical composition optimization and structural functionalization at the atomic and molecular levels. Subsequently, the fast-growing breakthroughs in catalytic activities, identification of highly active sites, and fundamental mechanisms are thoroughly discussed. Finally, a comprehensive commentary on the current primary challenges and future perspectives in water splitting and its commercialization for hydrogen production is provided. Hereby, new insights into the synthetic principles and electrocatalysis for designing MOF nanoarchitectures for the practical utilization of water splitting are offered, thus further promoting their future prosperity for a wide range of applications.
Cosmology with Eddington-inspired Gravity
Creators: name: Scargill, James H. C.
name: Banados, Maximo
name: Ferreira, Pedro G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the dynamics of homogeneous, isotropic universes which are governed by the Eddington-inspired alternative theory of gravity which has a single extra parameter, $κ$. Previous results showing singularity-avoiding behaviour for $κ> 0$ are found to be upheld in the case of domination by a perfect fluid with equation of state parameter $w > 0$. The range $-1/3 < w < 0$ is found to lead to universes which experience unbounded expansion rate whilst still at a finite density. In the case $κ< 0$ the addition of spatial curvature is shown to lead to the possibility of oscillation between two finite densities. Domination by a scalar field with an exponential potential is found to also lead to singularity-avoiding behaviour when $κ> 0$. Certain values of the parameters governing the potential lead to behaviour in which the expansion rate of the universe changes sign several times before transitioning to regular GR-like behaviour.
description: 13 pages, 8 figures
DG-Enhanced Hecke and KLR Algebras
Creators: name: Maksimau, Ruslan
name: Vaz, Pedro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We construct DG-enhanced versions of the degenerate affine Hecke algebra and of the affine Hecke algebra. We extend Brundan-Kleshchev and Rouquier's isomorphism and prove that after completion DG-enhanced versions of affine Hecke algebras (degenerate or nondegenerate) are isomorphic to completed DG-enhanced versions of KLR algebras for suitably defined quivers. As a byproduct, we deduce that these DG-algebras have homologies concentrated in degree zero. These homologies are isomorphic respectively to the degenerate cyclotomic Hecke algebra and the cyclotomic Hecke algebra.
M.-H. Jullien, F. Perelman (Hg.), Clavis Scriptorum Latinorum Medii Aevi. Auctores Galliae 735–987. T. II: Alcuinus, Indices, 1999
Creators: name: Pörnbacher, Mechthild
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 30 Nr. 1 (2003)
Topological insulators and thermoelectric materials
Creators: name: Müchler, Lukas
name: Casper, Frederick
name: Yan, Binghai
name: Chadov, Stanislav
name: Felser, Claudia
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological insulators (TIs) are a new quantum state of matter which have gapless surface states inside the bulk energy gap. Starting with the discovery of two dimensional TIs, the HgTe-based quantum wells, many new topological materials have been theoretically predicted and experimentally observed. Currently known TI materials can possibly be classified into two families, the HgTe family and the Bi2Se family. The signatures found in the electronic structure of a TI also cause these materials to be excellent thermoelectric materials. On the other hand, excellent thermoelectric materials can be also topologically trivial. Here we present a short introduction to topological insulators and thermoelectrics, and give examples of compound classes were both good thermoelectric properties and topological insulators can be found.
description: Phys. Status Solidi RRL, accepted
Opening in times of crisis? Examining NATO and the EU's support to security sector reform in post-Maidan Ukraine
Creators: name: Shea, Elyssa
name: Jaroszewicz, Marta
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Security
subject: democratisation
subject: conflict
subject: NATO
subject: EU
subject: Ukraine
subject: 300 Sozialwissenschaften::320 Politikwissenschaft::320 Politikwissenschaft

description: Security sector reform has remained largely disconnected from the broader debate on societal transition in the literature thus far. We conceptualise how external support to security sector reform could potentially facilitate socio-political order opening in a limited access order. Based on two dimensions, we examine the case of NATO and EU's support to Ukraine's security sector reform between 2014 and 2019. NATO's support to the military and the EU's support to the police and state security service (SBU) appear unlikely to cause opening of the social order, while NATO's support to the military-industrial complex is more likely to cause opening.
R.-H. Bautier, J. Sornay, Les sources de l'histoire économique et sociale du Moyen Âge. [II] Les États de la Maison de Bourgogne, vol. I: Archives centrales de l'État bourguignon (1384-1500). Archives des principautés territoriales, 2001
Creators: name: Greve, Anke
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 30 Nr. 1 (2003)
YouTube as Alternative Television in Russia: Political Videos During the Presidential Election Campaign 2018
Creators: name: Litvinenko, Anna
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: YouTube
subject: political communication
subject: authoritarianism
subject: online media
subject: Russia
subject: 000 Informatik, Informationswissenschaft, allgemeine Werke::070 Publizistische Medien, Journalismus, Verlagswesen::077 Journalismus und Zeitungen in Osteuropa; in Russland

description: Previous studies on "youtubification" of political communication (May, 2010) have largely focused on democratic contexts. This study aims at exploring the role of the global video-sharing platform in non-democratic political communication, using the example of the Russian presidential election of 2018. It draws on the qualitative content analysis of 169 political videos collected from the "Popular" section of Russian YouTube during the last 2 months of the presidential campaign. The results show that oppositional discourse dominated the most popular political videos of Russian YouTube and that pro-state actors tried to co-opt the platform, publishing videos made in amateur and semi-professional styles that imitated user-generated content. Drawing on the findings, I discuss the risks and benefits of YouTube publics for the Russian authoritarian regime and the role of social media platforms in consultative authoritarianism.
Variational Quantum Linear Solver
Creators: name: Bravo-Prieto, Carlos
name: LaRose, Ryan
name: Cerezo, M.
name: Subasi, Yigit
name: Cincio, Lukasz
name: Coles, Patrick J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Previously proposed quantum algorithms for solving linear systems of equations cannot be implemented in the near term due to the required circuit depth. Here, we propose a hybrid quantum-classical algorithm, called Variational Quantum Linear Solver (VQLS), for solving linear systems on near-term quantum computers. VQLS seeks to variationally prepare $|x\rangle$ such that $A|x\rangle\propto|b\rangle$. We derive an operationally meaningful termination condition for VQLS that allows one to guarantee that a desired solution precision $ε$ is achieved. Specifically, we prove that $C \geq ε^2 / κ^2$, where $C$ is the VQLS cost function and $κ$ is the condition number of $A$. We present efficient quantum circuits to estimate $C$, while providing evidence for the classical hardness of its estimation. Using Rigetti's quantum computer, we successfully implement VQLS up to a problem size of $1024\times1024$. Finally, we numerically solve non-trivial problems of size up to $2^{50}\times2^{50}$. For the specific examples that we consider, we heuristically find that the time complexity of VQLS scales efficiently in $ε$, $κ$, and the system size $N$.
description: 16 + 8 pages, 15 figures, 7 tables
An analytical phase-space model for tidal caustics
Creators: name: Sanderson, Robyn E.
name: Helmi, Amina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The class of tidal features around galaxies known variously as "shells" or "umbrellas" comprises debris that has arisen from high-mass-ratio mergers with low impact parameter; the nearly radial orbits of the debris give rise to a unique morphology, a universal density profile, and a tight correlation between positions and velocities of the material. As such they are accessible to analytical treatment, and can provide a relatively clean system for probing the gravitational potential of the host galaxy. In this work we present a simple analytical model that describes the density profile, phase-space distribution, and geometry of a shell, and whose parameters are directly related to physical characteristics of the interacting galaxies. The model makes three assumptions: that their orbit is radial, that the potential of the host is spherical at the shell radii, and that the satellite galaxy had a Maxwellian velocity distribution. We quantify the error introduced by the first two assumptions and show that selecting shells by their appearance on the sky is a sufficient basis to assume that these simplifications are valid. We further demonstrate that (1) given only an image of a shell, the radial gravitational force at the shell edge and the phase-space density of the satellite are jointly constrained, (2) that combining the image with measurements of either point line-of-sight velocities or integrated spectra will yield an independent estimate of the gravitational force at a shell, and (3) that an independent measurement of this force is obtained for each shell observed around a given galaxy, potentially enabling a determination of the galactic mass distribution.
description: Resubmitted to MNRAS. This version has been wholly restructured for better reading, and a problem with one set of simulations has been fixed. The main results are unchanged
title: Wie bestimmt die Distanz zum Untersuchungsgegenstand den Forschungsprozess?. Teil 6
Creators: name: Kalter, Christoph
Publisher: name: ZZF - Centre for Contemporary History: Zeitgeschichte online
Year: 2023

description: Dieser Text ist eine Verschriftlichung des Eingangsstatements von Christoph Kalter bei der Diskussionsreihe "Geschichtliche Grundfragen". Die von Rüdiger Graf (ZZF), Matthias Pohlig (HUB) und Ulrike Schaper (FU Berlin) initiierte Veranstaltung fand im Wintersemester 2022/23 im Online-Format statt. Zeitgeschichte|online veröffentlicht die Eingangsstatements der Veranstaltung in einem Dossier. Die Vorträge wurden bis auf wenige Ausnahmen von der Audioaufnahme transkribiert und überarbeitet, dabei wurde Wert darauf gelegt, die rein sprachliche Form der Statements beizubehalten.
Effect of different silica coatings on the toxicity of upconversion nanoparticles on RAW 264.7 macrophage cells
Creators: name: Kembuan, Cynthia
name: Oliveira, Helena
name: Graf, Christina
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: cytotoxicity
subject: ion release
subject: RAW 264.7 macrophage cell line
subject: silica coating
subject: upconversion nanoparticles
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Upconversion nanoparticles (UCNPs), consisting of NaYF4 doped with 18% Yb and 2% Er, were coated with microporous silica shells with thickness values of 7 +/- 2 and 21 +/- 3 nm. Subsequently, the negatively charged particles were functionalized with N-(6-aminohexyl)-3-aminopropyltrimethoxysilane (AHAPS), which provide a positive charge to the nanoparticle surface. Inductively coupled plasma optical emission spectrometry (ICP-OES) measurements revealed that, over the course of 24h, particles with thicker shells release fewer lanthanide ions than particles with thinner shells. However, even a 21 +/- 3 nm thick silica layer does not entirely block the disintegration process of the UCNPs. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays and cell cytometry measurements performed on macrophages (RAW 264.7 cells) indicate that cells treated with amino-functionalized particles with a thicker silica shell have a higher viability than those incubated with UCNPs with a thinner silica shell, even if more particles with a thicker shell are taken up. This effect is less significant for negatively charged particles. Cell cycle analyses with amino-functionalized particles also confirm that thicker silica shells reduce cytotoxicity. Thus, growing silica shells to a sufficient thickness is a simple approach to minimize the cytotoxicity of UCNPs.
Singular solutions in optimal control: second order conditions and a shooting algorithm
Creators: name: Aronna, M. Soledad
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this article we study optimal control problems for systems that are affine in one part of the control variable. Finitely many equality and inequality constraints on the initial and final values of the state are considered. We investigate singular optimal solutions for this class of problems. First, we obtain second order necessary and sufficient conditions for weak optimality. Afterwards, we propose a shooting algorithm and show that the sufficient condition above-mentioned is also sufficient for the local quadratic convergence of the algorithm.
A construction of representations of 3-manifold groups into PU(2,1) through Lefschetz fibrations
Creators: name: Dashyan, Ruben
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We obtain infinitely many (non-conjugate) representations of 3-manifold fundamental groups into a lattice in the holomorphic isometry group of complex hyperbolic space. The lattice is an orbifold fundamental group of a branched covering of the projective plane along an arrangement of hyperplanes constructed by Hirzebruch. The 3-manifolds are related to a Lefschetz fibration of the complex hyperbolic orbifold.
Comptes de l'argentier de Charles le Téméraire, duc de Bourgogne, publ. par A. Greve, É. Lebailly, sous la direction de W. Paravicini, Vol. 1, Année 1468, 2001. - Vol. 2, Année 1469, 2002
Creators: name: Greve, Anke
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 30 Nr. 1 (2003)
title: Relevanz der Geschichte. Teil 1
Creators: name: Knoch, Habbo
Publisher: name: ZZF - Centre for Contemporary History: Zeitgeschichte online
Year: 2022

description: Dieser Text ist eine Verschriftlichung des Eingangsstatement von Habbo Knoch bei der Diskussionsreihe "Geschichtliche Grundfragen". Die von Rüdiger Graf (ZZF), Matthias Pohlig (HUB) und Ulrike Schaper (FU Berlin) initiierte Veranstaltung fand im Wintersemester 2021/22 im online-Format statt. Zeitgeschichte|online veröffentlicht die Eingangsstatements der Veranstaltung in einem Dossier. Die Vorträge wurden bis auf wenige Ausnahmen von der Audioaufnahme transkribiert und überarbeitet, dabei wurde Wert darauf gelegt, die rein sprachliche Form der Statements beizubehalten.
F. Nies, Jedem seine Wahrheit. Karikatur und Zeitungslesen, 2001
Creators: name: Moureau, François
Publisher: name: Francia
Year: 2019

description: F. Nies, Jedem seine Wahrheit. Karikatur und Zeitungslesen, 2001 (F. Moureau)
description: Francia, Bd. 30 Nr. 2 (2003)