cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electron screening effects on crustal torsional oscillations
Creators: name: Sotani, Hajime
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We systematically examine the crustal torsional oscillations as varying the stellar mass and radius, where we take into account the effect of electron screening due to the inhomogeneity of electron distribution. In the examinations, we adopt two different equations of state (EOSs) for the inner crust region of neutron stars. As a result, we find that the frequencies depend obviously on the EOS, even if the neutron star models are almost independent of the EOS. That is, one could solve the degeneracy of the stellar models with different EOS via the observations of shear oscillations frequencies. Additionally, we find that the fundamental frequencies of the $l$-th order torsional oscillations can reduce 6% due to the effect of electron screening, which is independent of the adopted EOS and stellar models. This reduction of frequencies can be crucial to make a constraints on the density dependence of the nuclear symmetry energy, $L$, i.e., the constraint on $L$ can reduce ~15% by the electron screening effect.
description: accepted for publication in PLB
Crystal and Magnetic Structure of CaCo{1.86}As2 Studied by X-ray and Neutron Diffraction
Creators: name: Quirinale, D. G.
name: Anand, V. K.
name: Kim, M. G.
name: Pandey, Abhishek
name: Huq, A.
name: Stephens, P. W.
name: Heitmann, T. W.
name: Kreyssig, A.
name: McQueeney, R. J.
name: Johnston, D. C.
name: Goldman, A. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo{1.86}As2. The crystal structure is a collapsed-tetragonal ThCr2Si2-type structure as previously reported, but with 7(1)% vacancies on the Co sites corresponding to the composition CaCo{1.86(2)}As2. The thermal expansion coefficients for both the a- and c-axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the Neel temperature TN = 52(1) K with the ordered moments directed along the tetragonal c-axis, aligned ferromagnetically in the ab-plane and antiferromagnetically stacked along the c-axis.
description: 8 pages, 5 figures, 2 tables; submitted to Phys. Rev. B
Adhesion and relaxation of a soft elastomer on surfaces with skin like roughness
Creators: name: Fischer, Sarah
name: Boyadzhieva, Silviya
name: Hensel, René
name: Kruttwig, Klaus
name: Arzt, Eduard
Publisher: name: Amsterdam : Elsevier
Year: 2018
Subjects: subject: 620

description: For designing new skin adhesives, the complex mechanical interaction of soft elastomers with surfaces of various roughnesses needs to be better understood. We systematically studied the effects of a wide set of roughnesscharacteristics, film thickness, hold time and material relaxation on the adhesive behaviour of the silicone elastomer SSA 7–9800 (Dow Corning). As model surfaces, we used epoxy replicas obtained from substrates with roughness ranging from very smooth to skin-like. Our results demonstrate that films of thin and intermediate thickness (60 and 160 μm) adhered best to a sub-micron rough surface, with a pull-off stress of about 50 kPa. Significant variations in pull-off stress and detachment mechanism with roughness and hold time were found. In contrast, 320 μm thick films adhered with lower pull-off stress of about 17 kPa, but were less sensitive to roughness and hold time. It is demonstrated that the adhesion performance of the siliconefilms to rough surfaces can be tuned by tailoring the film thickness and contact time.
Long-term X-ray emission from Swift J1644+57
Creators: name: Zou, Y. C.
name: Wang, F. Y.
name: Cheng, K. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The X-ray emission from Swift J1644+57 is not steadily decreasing instead it shows multiple pulses with declining amplitudes. We model the pulses as reverse shocks from collisions between the late ejected shells and the externally shocked material, which is decelerated while sweeping the ambient medium. The peak of each pulse is taken as the maximum emission of each reverse shock. With a proper set of parameters, the envelope of peaks in the light curve as well as the spectrum can be modelled nicely.
description: 6 pages, 2 figures, accepted for publication in MNRAS
title: Gold nanoparticle distribution in polyelectrolyte brushes loaded at different pH conditions
Creators: name: Boyaciyan, Dikran
name: Braun, Larissa
name: Löhmann, Oliver
name: Silvi, Luca
name: Schneck, Emanuel
name: Klitzing, Regine von
Publisher: name: AIP Publishing
Year: 2022

description: Composites made of polymer brushes with inclusions of gold nanoparticles (AuNPs) combine the responsive nature of polymer brushes with the optical properties of the AuNPs, which offers the possibility to be used as colorimetric sensors. To this end, it is crucial to know how AuNPs are distributed inside the brush. Here, this distribution was elucidated by neutron reflectometry with contrast variation and a self-consistent reflectivity analysis based on the analytical parameterization of the volume fraction profiles of all chemical components. In contrast to former studies, this analysis allows the determination of the spatial distribution of components separately from each other: polyelectrolyte, AuNP, and water. Cationic poly-[2-(Methacryloyloxy) ethyl] trimethylammonium chloride (PMETAC) brushes were loaded with 5 nm AuNPs, which were coated with a pH-sensitive capping. The pH was varied during the incubation of the brush in the AuNP suspension. At a lower pH, AuNPs form aggregates in suspension and are attached to the brush periphery. They adsorb into the brush but do not fully penetrate it due to their bulkiness. At a higher pH, AuNP suspensions are electrostatically stabilized and the AuNPs penetrate the brush entirely. However, the AuNP distribution over the brush is not homogeneous but decreases gradually toward the substrate. Penetration of the AuNPs leads to a more extended conformation of the brush. According to the results of the detailed analysis of all components, an increase in water content could be excluded as a reason for brush swelling but replacement of water by the AuNP was observed.
Detecting activity cycles of late-type dwarfs in Kepler data
Creators: name: Vida, K.
name: Oláh, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using data of fast-rotating active dwarf stars in the Kepler database, we perform time-frequency analysis of the light curves in order to search for signs of activity cycles. We use the phenomenon that the active region latitudes vary with the cycle (like the solar butterfly diagram), which causes the observed rotation period to change as a consequence of differential rotation. We find cycles in 8 cases of the 39 promising targets with periods between of 300-900 days.
description: 4 pages, 2 figures, 1 table, submitted to proceedings of IAUS 302: Magnetic Fields Throughout Stellar Evolution
Adiabatic eigenstate deformations and weak integrability breaking of Heisenberg chain
Creators: name: Orlov, Pavel
name: Tiutiakina, Anastasiia
name: Sharipov, Rustem
name: Petrova, Elena
name: Gritsev, Vladimir
name: Kurlov, Denis V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the spin-1/2 XXX chain weakly perturbed away from integrability by an isotropic next-to-nearest neighbor exchange interaction. Recently, it was conjectured that this model possesses an infinite tower of quasiconserved integrals of motion (charges) [D. Kurlov et al., Phys. Rev. B 105, 104302 (2022)]. In this work we first test this conjecture by investigating how the norm of the adiabatic gauge potential (AGP) scales with the system size, which is known to be a remarkably accurate measure of chaos. We find that for the perturbed XXX chain the behavior of the AGP norm corresponds to neither an integrable nor a chaotic regime, which supports the conjectured quasi-integrability of the model. We then prove the conjecture and explicitly construct the infinite set of quasiconserved charges. Our proof relies on the fact that the XXX chain perturbed by next-to-nearest exchange interaction can be viewed as a truncation of an integrable long-range deformation of the Heisenberg spin chain.
description: 11 pages, 2 figures
Dynamical 3-Space: Black Holes in an Expanding Universe
Creators: name: Rothall, David P.
name: Cahill, Reginald T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Black holes are usually studied without including effects of the expanding universe. However in some recent studies black holes have been embedded in an expanding universe, in order to determine the interplay, if any, of these two dynamical processes. Dynamical 3-space theory contains time independent solutions for black holes, which are spatial in-flows, and separately the time dependent Hubble expansion. This theory has explained numerous puzzles in observational astrophysics and contains 3 constants; G, alpha - which from experimental data turns out to be the fine structure constant, and delta - which is a small but nonzero distance, possibly a Planck-type length. The Hubble expansion in the dynamical 3-space theory cannot be `switched off', forcing the study, first, of isolated black holes coexisting with the expanding universe. It is shown that a time dependent black hole and expanding universe solution exists. The nature and implications of these solutions are discussed as they evolve over time. A dynamical network of black holes and induced linking cosmic filaments forming bubble structures is discussed, as a consequence of dynamical 3-space undergoing a dynamical breakdown of homogeneity and isotropy, even in the absence of baryonic matter.
description: 7 pages, 8 figures. Improved graphics
Emergent honeycomb lattice in LiZn2Mo3O8
Creators: name: Flint, Rebecca
name: Lee, Patrick A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce the idea of emergent lattices, where a simple lattice decouples into two weakly-coupled lattices as a way to stabilize spin liquids. In LiZn2Mo3O8, the disappearance of 2/3rds of the spins at low temperatures suggests that its triangular lattice decouples into an emergent honeycomb lattice weakly coupled to the remaining spins, and we suggest several ways to test this proposal. We show that these orphan spins act to stabilize the spin-liquid in the $J_1-J_2$ honeycomb model and also discuss a possible 3D analogue, Ba2MoYO6 that may form a "depleted fcc lattice."
description: 5 pages, 2 figures
Graphical Assistant Grouped Network Autoregression Model: a Bayesian Nonparametric Recourse
Creators: name: Ren, Yimeng
name: Zhu, Xuening
name: Lu, Xiaoling
name: Hu, Guanyu
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Vector autoregression model is ubiquitous in classical time series data analysis. With the rapid advance of social network sites, time series data over latent graph is becoming increasingly popular. In this paper, we develop a novel Bayesian grouped network autoregression model, which can simultaneously estimate group information (number of groups and group configurations) and group-wise parameters. Specifically, a graphically assisted Chinese restaurant process is incorporated under the framework of the network autoregression model to improve the statistical inference performance. An efficient Markov chain Monte Carlo sampling algorithm is used to sample from the posterior distribution. Extensive studies are conducted to evaluate the finite sample performance of our proposed methodology. Additionally, we analyze two real datasets as illustrations of the effectiveness of our approach.
Torsion driving cosmic expansion
Creators: name: Kirsch, Johannes
name: Vasak, David
name: van de Venn, Armin
name: Struckmeier, Jürgen
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a cosmological model based on the canonical Hamiltonian transformation theory. Using a linear-quadratic approach for the free gravitational De Donder-Weyl Hamiltonian $H_\mathrm{Gr}$, the model contains terms describing a deformation of an AdS spacetime and a fully anti-symmetric torsion in addition to Einstein's theory. The resulting extension of the Einstein-Cartan theory depends on two initially unknown constants, $Ω_\mathrm{g}$ and $Ω_\mathrm{s}$. Given an appropriate choice of these parameters resulting from the analysis of asymptotics, numerical calculations were performed with $Ω_\mathrmΛ = 0$. Values from the Planck Collaboration were used for all other required cosmological parameters. In this way, it is shown that torsion can explain phenomena commonly attributed to dark energy, and thus can replace Einstein's cosmological constant.
description: 26 pages, 3 figures
Anti-inflammatory and anti-allodynic activities in mice of the essential oil and desmethylisoencecalin from Zinnia grandiflora Nuttall
Creators: name: Reyes-Pérez, Valeria
name: Granados-Soto, Vinicio
name: Linares, Edelmira
name: Bye, Robert
name: Mata, Rachel
name: Deciga-Campos, Myrna
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Zinnia grandiflora (Asteraceae) is used to alleviate several painful disorders. The effects of an essential oil prepared by hydrodistillation from Z. grandiflora (EOZ) and its major compound on neuropathic pain, allodynia, and inflammation in mice were assessed. Headspace-solid phase microextraction analysis of an aqueous extract was also carried out. GC-MS analyses of all volatiles revealed that germacrene D (13.24%) and desmethylisoencecalin (DME) (13.24%) were the most abundant compounds. EOZ was effective in reducing inflammation and allodynia in mice. EOZ (300 mg/paw) reverted tactile allodynia more effectively than gabapentin (100 μg/paw). DME (0.1‒10 µg/paw) responses in the carrageenan model were concentration-dependent; the maximum effect was observed at 10 µg/paw, like that of diclofenac (30 μg/paw). In the spinal nerve ligation model, DME (0.1‒10 μg/paw) exerted a concentration-dependent anti-allodynic action; its effect was better than that of gabapentin. A method to quantify zinagrandinolide E in the crude drug was developed and validated.
Trace ideal criteria for embeddings and composition operators on model spaces
Creators: name: Aleman, A.
name: Lyubarskii, Yu.
name: Malinnikova, E.
name: Perfekt, K. -M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 47B33, secondary 30H10, 30J05, 47A45

description: Let $K_θ$ be a model space generated by an inner function $θ$. We study the Schatten class membership of embeddings $I : K_θ\to L^2(μ)$, $μ$ a positive measure, and of composition operators $C_ϕ:K_θ\to H^2(\mathbb D)$ with a holomprphic function $ϕ:\mathbb D\rightarrow \mathbb D$. In the case of one-component inner functions $θ$ we show that the problem can be reduced to the study of natural extensions of $I$ and $C_ϕ$ to the Hardy-Smirnov space $E^2(D)$ in some domain $D\supset \mathbb D$. In particular, we obtain a characterization of Schatten membership of $C_ϕ$ in terms of Nevanlinna counting function. By example this characterization does not hold true for general $ϕ$.
description: 20 pages
title: Dissolution of β-C₂S Cement Clinker: Part 2 Atomistic Kinetic Monte Carlo (KMC) Upscaling Approach
Creators: name: Izadifar, Mohammadreza
name: Ukrainczyk, Neven
name: Salah Uddin, Khondakar Mohammad
name: Middendorf, Bernhard
name: Koenders, Eduardus
Publisher: name: MDPI
Year: 2022

description: Cement clinkers containing mainly belite (β-C₂S as a model crystal), replacing alite, offer a promising solution for the development of environmentally friendly solutions to reduce the high level of CO₂ emissions in the production of Portland cement. However, the much lower reactivity of belite compared to alite limits the widespread use of belite cements. Therefore, this work presents a fundamental atomistic computational approach for comprehending and quantifying the mesoscopic forward dissolution rate of β-C₂S, applied to two reactive crystal facets of (100) and (1¯00). For this, an atomistic kinetic Monte Carlo (KMC) upscaling approach for cement clinker was developed. It was based on the calculated activation energies (ΔG*) under far-from-equilibrium conditions obtained by a molecular dynamic simulation using the combined approach of ReaxFF and metadynamics, as described in the Part 1 paper in this Special Issue. Thus, the individual atomistic dissolution rates were used as input parameters for implementing the KMC upscaling approach coded in MATLAB to study the dissolution time and morphology changes at the mesoscopic scale. Four different cases and 21 event scenarios were considered for the dissolution of calcium atoms (Ca) and silicate monomers. For this purpose, the (100) and (1¯00) facets of a β-C₂S crystal were considered using periodic boundary conditions (PBCs). In order to demonstrate the statistical nature of the KMC approach, 40 numerical realizations were presented. The major findings showed a striking layer-by-layer dissolution mechanism in the case of an ideal crystal, where the total dissolution rate was limited by the much slower dissolution of the silicate monomer compared to Ca. The introduction of crystal defects, namely cutting the edges at two crystal boundaries, increased the overall average dissolution rate by a factor of 519.
Geometry induced pair condensation
Creators: name: Tovmasyan, Murad
name: van Nieuwenburg, Evert
name: Huber, Sebastian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a one-dimensional model of interacting bosons on a lattice with two flat bands. Regular condensation is suppressed due to the absence of a well defined minimum in the single particle spectrum. We find that interactions stabilize a number of non-trivial phases like a pair (quasi-) condensate, a supersolid at incommensurable fillings and valence bond crystals at commensurability. We support our analytical calculations with numerical simulations using the density matrix renormalization group technique. Implications for cold-atoms and extensions to higher dimensions are discussed.
description: 4+ pages
title: A Multi-Endpoint Approach to Base Excision Repair Incision Activity Augmented by PARylation and DNA Damage Levels in Mice
title: Impact of Sex and Age
titleType: Subtitle
Creators: name: Winkelbeiner, Nicola
name: Wandt, Viktoria K.
name: Ebert, Franziska
name: Lossow, Kristina
name: Bankoglu, Ezgi E.
name: Martin, Maximilian
name: Mangerich, Aswin
name: Stopper, Helga
name: Bornhorst, Julia
name: Kipp, Anna P.
name: Schwerdtle, Tanja
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: 570 Biowissenschaften; Biologie

description: Investigation of processes that contribute to the maintenance of genomic stability is one crucial factor in the attempt to understand mechanisms that facilitate ageing. The DNA damage response (DDR) and DNA repair mechanisms are crucial to safeguard the integrity of DNA and to prevent accumulation of persistent DNA damage. Among them, base excision repair (BER) plays a decisive role. BER is the major repair pathway for small oxidative base modifications and apurinic/apyrimidinic (AP) sites. We established a highly sensitive non-radioactive assay to measure BER incision activity in murine liver samples. Incision activity can be assessed towards the three DNA lesions 8-oxo-2’-deoxyguanosine (8-oxodG), 5-hydroxy-2’-deoxyuracil (5-OHdU), and an AP site analogue. We applied the established assay to murine livers of adult and old mice of both sexes. Furthermore, poly(ADP-ribosyl)ation (PARylation) was assessed, which is an important determinant in DDR and BER. Additionally, DNA damage levels were measured to examine the overall damage levels. No impact of ageing on the investigated endpoints in liver tissue were found. However, animal sex seems to be a significant impact factor, as evident by sex-dependent alterations in all endpoints investigated. Moreover, our results revealed interrelationships between the investigated endpoints indicative for the synergetic mode of action of the cellular DNA integrity maintaining machinery.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1021
title: Dissolution of β-C₂S Cement Clinker: Part 1 Molecular Dynamics (MD) Approach for Different Crystal Facets
Creators: name: Salah Uddin, Khondakar Mohammad
name: Izadifar, Mohammadreza
name: Ukrainczyk, Neven
name: Koenders, Eduardus
name: Middendorf, Bernhard
Publisher: name: MDPI
Year: 2022

description: A major concern in the modern cement industry is considering how to minimize the CO₂ footprint. Thus, cements based on belite, an impure clinker mineral (CaO)₂SiO₂ (C₂S in cement chemistry notation), which forms at lower temperatures, is a promising solution to develop eco-efficient and sustainable cement-based materials, used in enormous quantities. The slow reactivity of belite plays a critical role, but the dissolution mechanisms and kinetic rates at the atomistic scale are not known completely yet. This work aims to understand the dissolution behavior of different facets of β-C₂S providing missing input data and an upscaling modeling approach to connect the atomistic scale to the sub-micro scale. First, a combined ReaxFF and metadynamics-based molecular dynamic approach are applied to compute the atomistic forward reaction rates (RD) of calcium (Ca) and silicate species of (100) facet of β-C₂S considering the influence of crystal facets and crystal defects. To minimize the huge number of atomistic events possibilities, a generalized approach is proposed, based on the systematic removal of nearest neighbors’ crystal sites. This enables us to tabulate data on the forward reaction rates of most important atomistic scenarios, which are needed as input parameters to implement the Kinetic Monte Carlo (KMC) computational upscaling approach. The reason for the higher reactivity of the (100) facet compared to the (010) is explained.
Nuclear Liquid-Gas Transition in the Strong Coupling Regime of Lattice QCD
Creators: name: Kim, Jangho
name: Pattanaik, Pratitee
name: Unger, Wolfgang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The nuclear liquid-gas transition from a gas of hadrons to a nuclear phase cannot be determined numerically from conventional lattice QCD due to the severe sign problem at large values of the baryon chemical potential. In the strong coupling regime of lattice QCD with staggered quarks, the dual formulation is suitable to address the nuclear liquid gas transition. We determine this first order transition at low temperatures and as a function of the quark mass and the inverse gauge coupling $β$. We also determine the baryon mass and discuss the nuclear interactions as a function of the quark mass, and compare to mean field results.
description: 17 pages, 20 figures, 1 table
Formation of the Smectic-B Crystal from a Simple Monatomic Liquid
Creators: name: Metere, A.
name: Oppelstrup, T.
name: Sarman, S.
name: Laaksonen, A.
name: Dzugutov, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report a molecular dynamics simulation demonstrating that the Smectic B crystalline phase (Cr-B), commonly observed in mesogenic systems of anisotropic molecules, can be formed by a system of identical particles interacting via a spherically symmetric potential. The Cr-B phase forms as a result of a first order transition from an isotropic liquid phase upon isochoric cooling at appropriate number density. Its structure, determined by the design of the pair potential corresponds to Cr-B structure formed by elongated particles with the aspect ratio 1.8. The diffraction pattern, and the real-space structure inspection demonstrate dominance of the ABC-type of axial layer stacking. This result opens a general possibility of producing smectic phases using isotropic interparticle interaction both in simulations and in colloidal systems.
description: To be submitted to Physical Review Letters
Original Constitutional Lessons: Marriage, Defence, Juries, and Aliens
Creators: name: Edelman, James
Publisher: name: Monash University
Year: 2022
Subjects: Constitutional law

description: In constitutional interpretation there is an important divide which has been described as a difference between interpretation and construction, or between concept and conception, or between meaning and application, or between essential meaning and non-essential meaning. However it is described, this difference has been recognised in many decisions of the High Court of Australia. This lecture explores the difference by reference to High Court decisions in relation to four constitutional concepts: Aliens, Defence, Juries, and Marriage.
Semaphorin 3A-Neuropilin-1 Signaling Modulates MMP13 Expression in Human Osteoarthritic Chondrocytes
Creators: name: Stöckl, Sabine
name: Reichart, Johanna
name: Zborilova, Magdalena
name: Johnstone, Brian
name: Grässel, Susanne
Publisher: name: Universität Regensburg
Year: 2022
Subjects: subject: osteoarthritis; semaphorin-3A; neuropilin-1; chondrocyte metabolism; MMP13; AKT signaling
subject: 610 Medizin

description: Osteoarthritis (OA) is a complex disorder of diarthrodial joints caused by multiple risk factors and is characterized by articular cartilage destruction as well as changes in other articular tissues. Semaphorin 3A (Sema3A), known to be a chemo-repellent for sensory nerve fibers, has recently been implicated in cartilage OA pathophysiology. We demonstrated that the expression of SEMA3A and its receptor neuropilin-1 (NRP1) are synchronously upregulated in chondrocytes isolated from knee cartilage of OA patients compared to non-OA control chondrocytes. In addition, we observed that during in vitro passaging of OA chondrocytes, the Nrp-1 level increases, whereas the Sema3A level decreases. In this study, we aimed to uncover how Sema3A-Nrp-1 signaling affects metabolism and viability of OA chondrocytes via siRNA-mediated inhibition of Nrp-1 expression. We observed a decreased proliferation rate and an increase in adhesion and senescence after Nrp-1 silencing. Moreover, MMP13 gene expression was reduced by approximately 75% in NRP1 knockdown OA chondrocytes, whereas MMP13 expression was induced by Sema3A treatment in control (nt siRNA) OA chondrocytes, accompanied by an impaired AKT phosphorylation. These findings suggest a potential catabolic function of Sema3A signaling in OA chondrocytes by inducing MMP13 expression and by compromising pro-survival AKT activation. We propose that targeting the Sema3A-Nrp-1 signaling axis might be an opportunity to interfere with OA pathogenesis and progression.
title: Bond Behavior of a Bio-Aggregate Embedded in Cement-Based Matrix
Creators: name: Ferreira, Saulo Rocha
name: Andrade, Rodolfo Giacomim Mendes de
name: Andrade, Gabriele Melo de
name: Araújo, Olga Maria Oliveira de
name: Lopes, Ricardo Tadeu
name: Fairbairn, Eduardo de Moraes Rego
name: Grabois, Thiago Melo
name: Ukrainczyk, Neven
Publisher: name: MDPI
Year: 2022

description: This paper investigates the bond behavior between a bio-aggregate and a cement-based matrix. The experimental evaluation comprised physical, chemical, image, and mechanical characterization of the bio-aggregate. The image analyses about the bio-aggregate’s outer structure provided first insights to understand the particularities of this newly proposed bio-aggregate for use in cementitious materials. A mineral aggregate (granitic rock), largely used as coarse aggregate in the Brazilian civil construction industry, was used as reference. The bond behavior of both aggregates was evaluated via pull-out tests. The results indicated that both aggregates presented a similar linear elastic branch up to each respective peak loads. The peak load magnitude of the mineral aggregate indicated a better chemical adhesion when compared to the bio-aggregate’s. The post-peak behavior, however, indicated a smoother softening branch for the bio-aggregate, corroborated by the microscopy image analyses. Although further investigation is required, the macaúba crushed endocarp was found to be a thriving bio-material to be used as bio-aggregate.
High Stellar FUV/NUV Ratio and Oxygen Contents in the Atmospheres of Potentially Habitable Planets
Creators: name: Tian, Feng
name: France, Kevin
name: Linsky, Jeffrey L.
name: Mauas, Pablo J. D.
name: Vieytes, Mariela C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recent observations of several planet-hosting M dwarfs show that most have FUV/NUV flux ratios 1000 times greater than that of the Sun. Here we show that the atmospheric oxygen contents (O2 and O3) of potentially habitable planets in this type of UV environment could be 2~3 orders of magnitude greater than those of their counterparts around Sun-like stars as a result of decreased photolysis of O3, H2O2, and HO2. Thus detectable levels of atmospheric oxygen, in combination with the existence of H2O and CO2, may not be the most promising biosignatures on planets around stars with high FUV/NUV ratios such as the observed M dwarfs.
Deep Learning Collective Variables from Transition Path Ensemble
Creators: name: Ray, Dhiman
name: Trizio, Enrico
name: Parrinello, Michele
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The study of the rare transitions that take place between long lived metastable states is a major challenge in molecular dynamics simulations. Many of the methods suggested to address this problem rely on the identification of the slow modes of the system which are referred to as collective variables. Recently machine learning methods have been used to learn the collective variables as functions of a large number of physical descriptors. Among many such methods Deep Targeted Discriminant Analysis has proven to be useful. This collective variable is built from data harvested in short unbiased simulation in the two basins. Here we enrich the set of data on which the Deep Targeted Discriminant Analysis collective variable is built by adding data coming from the transition path ensemble. These are collected from a number of reactive trajectories obtained using the On-the-fly Probability Enhanced Sampling Flooding method. The collective variables thus trained, lead to a more accurate sampling and faster convergence. The performance of these new collective variables is tested on a number of representative examples.
Text-Mining-Pipelines für unstrukturierten Text
Creators: name: Barth, Florian
name: Calvo Tello, José
name: Funk, Stefan
name: Göbel, Mathias
name: Kurzawe, Daniel
name: Rißler-Pipka, Nanette
name: Veentjer, Ubbo
Publisher: name: Zenodo
Year: 2022
Subjects: Text mining, research data, digital library, NLP, unstructured text

description: Dieses Poster wurde auf dem Text+ Plenary (12 / 13. September 2022) in Mannheim vorgestellt. Es ist der Task Area / Datendomäne "Collections" zugeordnet und zeigt erste Ergebnisse des Clusters "Unstructured Text" aus dem Bereich der Bibliotheken. Es wird ein Workflow zur Verarbeitung von unstrukturiertem Text aus Göttinger Repositories und Text-Collections vorgestellt, der Komponenten zur Metadatenanreicherung ("Corpus Reader"), Erschließung von Strukturinformationen auf Textebene ("Natural Language Processing Pipeline") sowie zur Einbindung in eine Text-Mining-Plattform ("MINE") beinhaltet.
New Approaches to Scalable FAIRification of Sample Data
Creators: name: Macneil, Rory
name: Edmunds, Rorie
name: El-Gebali, Sara
Publisher: name: Zenodo
Year: 2022
Subjects: SciLifeLab
RSpace
DataCite
PIDs
IGSN ID
Controlled vocabularies
Samples
Metadata
HMC Conference 2022

description: Physical samples with informative metadata are more easily discoverable, shareable, and reusable. Metadata provides the framework for consistent, systematic, and standardized collection and documentation of sample information. This poster explores practical implementation of the FAIR Principles through creation of a framework centralized around biospecimens, linked datasets, sample information, and PIDs (Persistent Identifiers). Two initiatives aimed at enhancing FAIRification of sample data will be described. The first, by SciLifeLab Data Centre, is to mobilize the community to identify a minimum set of attributes required for describing biospecimens with ontological mapping for semantic unambiguity and machine actionability. The goal is to facilitate interoperability and portability of sample information among multiple repositories and resources (e.g., e-Infrastructures). In addition, identifying the required attributes for registering biospecimen PIDs will enable coupling of descriptive metadata and objects in a FAIR and comprehensive manner. The second initiative is development of the Inventory module of the RSpace electronic research notebook, which enables user-friendly and scalable sample collection and management and association of sample data and metadata with experimental data. The goal is similar to SciLifeLab’s: to facilitate portability and interoperability of sample information—in this case between RSpace and other tools, repositories, and e-Infrastructures. Ultimately, both initiatives implement common elements to FAIRify sample data: Association of variable domain-specific PIDs with sample data. Incorporation of variable but standardized sample metadata formats that enable scalable submission to domain repositories. User-friendly collection of sample data in the field. Automated and scalable passage of sample data and metadata through systems and into external tools and resources.
 Challenges faced and approaches to overcoming them will be outlined. The role of the IGSN–DataCite partnership, which is supporting global adoption, implementation, and use of IGSN identifiers by ensuring ongoing sustainability of IGSN PID infrastructure and by fostering a ‘Community of Communities of Practice’ across research domains, will be highlighted.
Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers
Creators: name: Nakagawa, Mayuri
name: Kanda, Natsuki
name: Otsu, Toshio
name: Ito, Isao
name: Kobayashi, Yohei
name: Matsunaga, Ryusuke
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a jitter correction method for asynchronous optical sampling (ASOPS) terahertz (THz) time-domain spectroscopy using two free-running oscillators. This method simultaneously records the THz waveform and a harmonic of the laser repetition rate difference, to monitor the jitter information for software jitter correction. By suppressing the residual jitter below 0.1 ps, the accumulation of the THz waveform is achieved without losing the measurement bandwidth. Our measurement of water vapor successfully resolves the absorption linewidths below 1 GHz, demonstrating a robust ASOPS with a flexible, simple, and compact setup without any feedback control or additional continuous-wave THz source.
description: 18 pages, 5 figures
title: Tunable anomalous Hall and Nernst effects in MM′X compounds
Creators: name: Samathrakis, Ilias
name: Fortunato, Nuno
name: Singh, Harish K.
name: Shen, Chen
name: Zhang, Hongbin
Publisher: name: IOP Publishing
Year: 2022

description: Based on first-principles calculations, the anomalous Hall conductivity (AHC) and anomalous Nernst conductivities (ANCs) of the XMnP (X = Ti, Zr, Hf) compounds are evaluated, and the possibility to tailor such properties in compounds susceptible to changing the magnetization directions is also investigated. We observe large changes in the calculated AHC and ANC for different magnetization directions that are originating from changes in the band structure all over the whole Brillouin zone. Our study gives a promising clue on engineering magnetic intermetallic compounds for tunable transverse thermoelectric applications.
Singular degree of a rational matrix pseudodifferential operator
Creators: name: Carpentier, Sylvain
name: De Sole, Alberto
name: kac, Victor G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35S05 (Primary) 16S32, 13N10 (Secondary)

description: In our previous work we studied minimal fractional decompositions of a rational matrix pseudodifferential operator: H=A/B, where A and B are matrix differential operators, and B is non-degenerate of minimal possible degree deg(B). In the present paper we introduce the singular degree sdeg(H)=deg(B), and show that for an arbitrary rational expression H=sum_a (A^a_1)/(B^a_1)...(A^a_n)/(B^a_n), we have that sdeg(H) is less than or equal to sum_{a,i} deg(B^a_i). If the equality holds, we call such an expression minimal. We study the properties of the singular degree and of minimal rational expressions. These results are important for the computations involved in the Lenard-Magri scheme of integrability.
description: 33 pages
title: Implicit A-Stable Peer Triplets for ODE Constrained Optimal Control Problems
Creators: name: Lang, Jens
name: Schmitt, Bernhard A.
Publisher: name: MDPI
Year: 2022

description: This paper is concerned with the construction and convergence analysis of novel implicit Peer triplets of two-step nature with four stages for nonlinear ODE constrained optimal control problems. We combine the property of superconvergence of some standard Peer method for inner grid points with carefully designed starting and end methods to achieve order four for the state variables and order three for the adjoint variables in a first-discretize-then-optimize approach together with A-stability. The notion triplets emphasize that these three different Peer methods have to satisfy additional matching conditions. Four such Peer triplets of practical interest are constructed. In addition, as a benchmark method, the well-known backward differentiation formula BDF4, which is only A(73.3°)-stable, is extended to a special Peer triplet to supply an adjoint consistent method of higher order and BDF type with equidistant nodes. Within the class of Peer triplets, we found a diagonally implicit A(84°)-stable method with nodes symmetric in [0, 1] to a common center that performs equally well. Numerical tests with four well established optimal control problems confirm the theoretical findings also concerning A-stability.
Medium-induced Interaction Between Impurities in a Bose-Einstein Condensate
Creators: name: Drescher, Moritz
name: Salmhofer, Manfred
name: Enss, Tilman
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider two heavy particles immersed in a Bose-Einstein condensate in three dimensions and compute their mutual interaction induced by excitations of the medium. For an ideal Bose gas, the induced interaction is Newtonian up to a shift in distance which depends on the coupling strength between impurities and Bosons. For a real BEC, we find that on short distances, the induced potential is dominated by three-body physics of a single Boson bound to the impurities, leading to an Efimov potential. At large distances of the order of the healing length, a Yukawa potential emerges instead. In particular, we find that both regimes are realized for all impurity-boson couplings and determine the corresponding crossover scales. The transition from the real to the ideal condensate at low gas parameters is investigated.
description: 7 pages, 5 figures
Editorial: Transcription and chromatin regulators in neurodevelopmental disorders.
Creators: name: van den Berg, Debbie LC
name: Heng, Julian Ik-Tsen
name: Sessa, Alessandro
name: Dias, Cristina
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine
subject: Model organisms
subject: Gene Expression
subject: Genetics & Genomics
subject: Developmental Biology
subject: Stem Cells

description: No description supplied
Eumerus angusticornis Rondani 1850
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus angusticornis

description: Eumerus angusticornis Rondani, 1850
ORIGINAL DESCRIPTION: 1850a: 120 (key), 128 (description).
TYPE LOCALITY: “ in Italiae centralis collibus [hills in central Italy]”.
TYPE MATERIAL: 2 ♂♂, syntypes (MZUF: Box 4): Eumerus Mgn / basalis Lw. angusticornis Rnd., ♂ / 137; 3 ♀♀, syntypes (MZUF: Box 4): Eumerus Mgn / basalis Lw. angusticornis Rnd., ♀ / 137; 1 ♂, syntype (MRSN: Box 53): Parma / Eumerus angusticornis Rond. / Museo di Zoologia della Università di Torino; 1 ♂, syntype (missing left fore-, mid- and right hind-legs) (MSNC: Box DIPTERA Ex collezione Rondani - I): Eumerus basalis Loew. angusticornis Rnd. ♂ ♀ Parma / Coll. Rondani, scatola n° 3, posiz. E-16 / Museo di Storia Naturale Università di Pisa, Calci (PI) ex collezione Rondani; 1 ♀, syntype (MSNC: Box DIPTERA Ex collezione Rondani - I): Eumerus basalis Loew. angusticornis Rnd. ♀ Parm. / Coll. Rondani, scatola n° 3, posiz. E-17 / Museo di Storia Naturale Università di Pisa, Calci (PI) ex collezione Rondani.
CURRENT STATUS: junior synonym of Eumerus basalis Loew, 1848 (Peck 1988: 155, Belcari et al. 1995a: 14).
REMARKS: Rondani (1850a: 128) described both sexes of Eumerus angusticornis without specifying the exact number of specimens and not giving a range of lengths. We found eight syntypes in this study.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 248, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Eumerus lejops Rondani 1857
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Eumerus
Eumerus lejops

description: Eumerus lejops Rondani, 1857
ORIGINAL DESCRIPTION: 1857: 87 (key), 94 (description).
TYPE LOCALITY: “ in collibus sub-apenninis parmensibus … in Etruria [Parmese sub-Apennine hills … Etruria (= Tuscany) (Italy)]”.
TYPE MATERIAL: 1 ♂, syntype (MZUF: Box 4): Eumerus Mgn / lejops Rnd., ♂ / 138 / Eumerus amoenus Loew (= lejops Rnd.), det. M. Daccordi, 1994; 3 ♂♂, syntypes (one missing right mid-leg) (MZUF: Box 4): Eumerus Mgn / lejops Rnd., ♂ / 138.
CURRENT STATUS: doubtful species of Eumerus Meigen, 1822 (Peck 1988: 165); junior synonym of Eumerus amoenus Loew, 1848 (Belcari et al. 1995a: 14).
REMARKS: Rondani (1857: 94) described Eumerus lejops from just the male sex: “ Marem ter legi …, et alterum … D. Piccioli misit [I collected the male three times …, and Mr. Piccioli sent another one to me]”. We found four syntypes in this study.A female numbered “138” in the MZUF (Box 4) is not included in the type series because of its sex.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on pages 249-250, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Torsion homology growth and cycle complexity of arithmetic manifolds
Creators: name: Bergeron, Nicolas
name: Sengun, Mehmet Haluk
name: Venkatesh, Akshay
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Let M be an arithmetic hyperbolic 3-manifold, such as a Bianchi manifold. We conjecture that there is a basis for the second homology of M, where each basis element is represented by a surface of `low' genus, and give evidence for this. We explain the relationship between this conjecture and the study of torsion homology growth.
Neutrino Mass and Mixing Models with Eclectic Flavor Symmetry $Δ(27) \rtimes T'$
Creators: name: Ding, Gui-Jun
name: King, Stephen F.
name: Li, Cai-Chang
name: Liu, Xiang-Gan
name: Lu, Jun-Nan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Kähler potentials of modular symmetry models receive unsuppressed contributions which may be controlled by a flavor symmetry, where the combination of the two symmetry types is referred to as eclectic flavor symmetry. After briefly reviewing the consistency conditions of eclectic flavor symmetry models, including with generalised (g)CP, we perform a comprehensive bottom-up study of eclectic flavor symmetry models based on $Ω(1)\cong Δ(27)\rtimes T^\prime$, consisting of the flavor symmetry $Δ(27)$ in a semi-direct product with the modular symmetry $T^\prime$. The modular transformations of different $Δ(27)$ multiplets are given by solving the consistency condition. The eight nontrivial singlets of $Δ(27)$ are related by $T'$ modular symmetry, and they have to be present or absent simultaneously in any $Ω(1)$ model. The most general forms of the superpotential and Kähler potential invariant under $Ω(1)$ are discussed, and the corresponding fermion mass matrices are presented. Based on the eclectic flavor group $Ω(1)$, two concrete lepton models which can successfully describe the experimental data of lepton masses and mixing parameters are constructed. For the two models without gCP, all six mixing parameters vary in small regions. A nearly maximal atmospheric mixing angle $θ_{23}$ and Dirac CP phase $δ_{CP}$ are obtained in the first model. After considering the compatible gCP symmetry and the assumption of $\Re τ=0$ in the first model, the $μ-τ$ reflection symmetry is preserved in the charged lepton diagonal basis. As a consequence, the atmospheric mixing angle and Dirac CP phase are predicted to be maximal, and two Majorana CP phases are predicted to be $π$.
description: 47 pages, 2 figures