cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inferring the initial condition for the Balitsky-Kovchegov equation
Creators: name: Casuga, Carlisle
name: Karhunen, Mikko
name: Mäntysaari, Heikki
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We apply Bayesian inference to determine the posterior likelihood distribution for the parameters describing the initial condition of the small-$x$ Balitsky-Kovchegov evolution equation at leading logarithmic accuracy. The HERA structure function data is found to constrain most of the model parameters well. In particular, we find that the HERA data prefers an anomalous dimension $γ\approx 1$ unlike in previous fits where $γ>1$ which led to e.g. the unintegrated gluon distribution and the quark-target cross sections not being positive definite. The determined posterior distribution can be used to propagate the uncertainties in the non-perturbative initial condition when calculating any other observable in the Color Glass Condensate framework. We demonstrate this explicitly for the inclusive quark production cross section in proton-proton collisions and by calculating predictions for the nuclear modification factor for the $F_2$ structure function in the EIC and LHeC/FCC-he kinematics.
description: "v2 matches the published version"
Additional file 1 of User knowledge factors that hinder the design of new home healthcare devices: investigating thirty-eight devices and their manufacturers
Creators: name: Yang, Fan
name: Al Mahmud, Abdullah
name: Wang, Tao
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 1. Theinterview questions.
Model Results Mielke et al from Bystanders intervene to impede grooming in Western chimpanzees and sooty mangabeys
Creators: name: Mielke, Alexander
name: Samuni, Liran
name: Preis, Anna
name: Gogarten, Jan F.
name: Crockford, Catherine
name: Wittig, Roman M.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Tables of model results for Mielke et al.
How to Build a Black Hole out of Instantons
Creators: name: Mouland, Rishi
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An often fruitful route to study quantum gravity is the determination and study of quantum mechanical models--that is, models with finite degrees of freedom--that capture the dynamics of a black hole's microstates. An example of such a model is the superconformal quantum mechanics of Yang-Mills instantons, which has a proposed gravitational dual description as M-theory on a background of the form $X_7\times S^4$. This model arises in the strongly-coupled limit of the BFSS matrix model with additional fundamental hypermultiplets, offering a route towards useful numerical simulation. We construct a six-parameter black hole solution in this theory, which is generically non-supersymmetric and non-extremal, and is shown to arise in an "ultra-spinning" limit of the recently-found six-parameter AdS$_7$ solution. We compute its thermodynamic properties, and show that in the supersymmetric limit the entropy and on-shell action match precisely the expected results as computed from the superconformal index of the quantum mechanics, to leading order in the supergravity regime. The low-lying spectrum thus provides access to the dynamics of near-extremal black holes, whose spectra are expected to receive strong quantum corrections.
description: 37 pages, 3 figures. Minor clarifications, matches published version
Supplementary Appendixes 3.2, 3.3 and 3.4
Creators: name: Richardson, David Mark
Publisher: name: Zenodo
Year: 2020
Subjects: biological invasions, plant invasions, South Africa

description: Supplementary Appendixes 3.2, 3.3 and 3.4 Supplementary Appendix 3.2 Drawing conclusions from two national-scale assessments of alien plants in South Africa Supplementary Appendix 3.3. Approach for defining alien plant species assemblage zones Supplementary Appendix 3.4 Methods for exploring the relationship between species richness of naturalised alien and native plants in quarter-degree grid cells and environmental variables
Convergence of the discrete dipole approximation. I. Theoretical analysis
Creators: name: Yurkin, Maxim A.
name: Maltsev, Valeri P.
name: Hoekstra, Alfons G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We performed a rigorous theoretical convergence analysis of the discrete dipole approximation (DDA). We prove that errors in any measured quantity are bounded by a sum of a linear and quadratic term in the size of a dipole d, when the latter is in the range of DDA applicability. Moreover, the linear term is significantly smaller for cubically than for non-cubically shaped scatterers. Therefore, for small d errors for cubically shaped particles are much smaller than for non-cubically shaped. The relative importance of the linear term decreases with increasing size, hence convergence of DDA for large enough scatterers is quadratic in the common range of d. Extensive numerical simulations were carried out for a wide range of d. Finally we discuss a number of new developments in DDA and their consequences for convergence.
description: 23 pages, 5 figures; added several corrections according to the published erratum except for Eq.(6) (it was correct in the original paper) and with additional correction in Eq.(96) [$\bar{\mathbf{G}}(...)\mathbf{P}_i^s -\bar{\mathbf{G}}^s(...)\mathbf{P}_i^p$ instead of $(\bar{\mathbf{G}}(...) - \bar{\mathbf{G}}^s(...))\mathbf{P}_i^s$]
Unified Treatment of Null and Spatial Infinity III: Asymptotically Minkowski Space-times
Creators: name: Ashtekar, Abhay
name: Khera, Neev
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Spi framework provides a 4-dimensional approach to investigate the asymptotic properties of gravitational fields as one recedes from isolated systems in any space-like direction, without reference to a Cauchy surface. It is well suited to unify descriptions at null and spatial infinity because $\mathscr{I}$ arises as the null cone of $i^\circ$. The goal of this work is to complete this task by introducing a natural extension of the asymptotic conditions at null and spatial infinity, by 'gluing' the two descriptions appropriately. Space-times satisfying these conditions are asymptotically flat in both regimes and thus represent isolated gravitating systems. They will be said to be Asymptotically Minkowskian at $i^\circ$. We show that in these space-times the Spi group $\mathfrak{S}$ as well as the BMS group $\mathcal{B}$ naturally reduce to a single Poincaré group, denoted by $\mathfrak{p}_{i^\circ}$ to highlight the fact that it arises from the gluing procedure at $i^\circ$. The asymptotic conditions are sufficiently weak to allow for the possibility that the Newman-Penrose component $Ψ^\circ_1$ diverges in the distant past along $\mathscr{I}^+$. This can occur in astrophysical sources that are not asymptotically stationary in the past, e.g. in scattering situations. Nonetheless, as we show in the companion paper, the energy momentum and angular momentum defined at $i^\circ$ equals the sum of that defined at a cross-section $S$ of $\mathscr{I}^+$ and corresponding flux across $\mathscr{I}^+$ to the past of $S$, when the quantities refer to the preferred Poincaré subgroup $\mathfrak{p}_{i^\circ}$.
description: References and minor clarifications added. Version to appear in JHEP. 36 pages, 1 figure
Modelling Complexity: the case of Climate Science
Creators: name: Lucarini, Valerio
Publisher: name: arXiv
Year: 2011
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Classical Physics (physics.class-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We briefly review some of the scientific challenges and epistemological issues related to climate science. We discuss the formulation and testing of theories and numerical models, which, given the presence of unavoidable uncertainties in observational data, the non-repeatability of world-experiments, and the fact that relevant processes occur in a large variety of spatial and temporal scales, require a rather different approach than in other scientific contexts. A brief discussion of the intrinsic limitations of geo-engineering solutions to global warming is presented, and a framework of investigation based upon non-equilibrium thermodynamics is proposed. We also critically discuss recently proposed perspectives of development of climate science based purely upon massive use of supercomputer and centralized planning of scientific priorities.
description: 17 pages, 7 figs, Proceeding of the Conference "Modelling Complexity: the case of Climate Science", Hamburg, 2010
Guiding principles for the design of a chemical vapor deposition process for highly crystalline transition metal dichalcogenides
Creators: name: Voronenkov, Vladislav
name: Groven, Benjamin
name: Silva, Henry Medina
name: Morin, Pierre
name: De Gendt, Stefan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional transition metal dichalcogenides (TMDs) for advanced logic transistor technologies are deposited by various modifications of the chemical vapor deposition (CVD) method using a wide variety of precursors. Being a major electrical performance limiter, the TMD crystal grain size strongly differs between the various CVD precursor chemistries from nano- to millimeter-sized crystals. However, it remains unclear how the CVD precursor chemistry affects the nucleation density and resulting TMD crystal grain size. This work postulates guiding principles to design a CVD process for highly crystalline TMD deposition using a quantitative analytical model benchmarked against literature. The TMD nucleation density reduces favorably under low supersaturation conditions, where the metal precursor sorption on the starting surface is reversible and the corresponding metal precursor desorption rate exceeds the overall deposition rate. Such reversible precursor adsorption guarantees efficient long-range gas-phase lateral diffusion of precursor species in addition to short-range surface diffusion, which vitally increases crystal grain size. As such, the proposed model explains the large spread in experimentally observed TMD nucleation densities and crystal grain sizes for state-of-the-art CVD chemistries. Ultimately, it empowers the reader to interpret and modulate precursor adsorption and diffusion reactions through designing CVD precursor chemistries compatible with temperature sensitive application schemes.
N‐heterocyclic carbene catalyzed photoenolization/Diels–Alder reaction of acid fluorides
Creators: name: Mavroskoufis, Andreas
name: Rajes, Keerthana
name: Golz, Paul
name: Agrawal, Arush
name: Ruß, Vincent
name: Götze, Jan P.
name: Hopkinson, Matthew N.
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: acid fluorides
subject: N-heterocyclic carbenes
subject: organocatalysis
subject: photochemistry
subject: photoenolization
subject: 500 Naturwissenschaften und Mathematik::590 Tiere (Zoologie)::590 Tiere (Zoologie)

description: The combination of light activation and N‐heterocyclic carbene (NHC) organocatalysis has enabled the use of acid fluorides as substrates in a UVA‐light‐mediated photochemical transformation previously observed only with aromatic aldehydes and ketones. Stoichiometric studies and TD‐DFT calculations support a mechanism involving the photoactivation of an ortho‐toluoyl azolium intermediate, which exhibits “ketone‐like” photochemical reactivity under UVA irradiation. Using this photo‐NHC catalysis approach, a novel photoenolization/Diels–Alder (PEDA) process was developed that leads to diverse isochroman‐1‐one derivatives.
The Illusion of Requirements in Software Development
Creators: name: Ralph, Paul
Publisher: name: arXiv
Year: 2013
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.1

description: It is widely accepted that understanding system requirements is important for software development project success. However, this paper presents two novel challenges to the requirements concept. First, where many plausible approaches to achieving a goal are evident, there may be insufficient overlap between approaches to form requirements. Second, while all plausible approaches may have sufficient overlap to state requirements, we cannot know that unless all approaches are identified and we are sure that none have been missed. This suggest that many, if not most, software projects may have too few requirements drive the design process, and that analysts may misrepresent design decisions as requirements to compensate.
description: 5 pages, 1 table, 1 figure; accepted for publication in Requirements Engineering: http://link.springer.com/article/10.1007%2Fs00766-012-0161-4
Seek and Find Falling Pollen
Creators: name: Shindo, Masayo
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 370102
subject: Air pollution processes and air quality measurement
classificationCode: 410102
subject: Ecological impacts of climate change and ecological adaptation
classificationCode: 410206
subject: Landscape ecology

description: This is a simple experimental text book to predict and measure pollen amounts
Non-Bloch band theory of generalized eigenvalue problems
Creators: name: Yokomizo, Kazuki
name: Yoda, Taiki
name: Ashida, Yuto
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Waves in a variety of fields in physics, such as mechanics, optics, spintronics, and nonlinear systems, obey generalized eigenvalue equations. To study non-Hermitian physics of those systems, in this paper, we construct a non-Bloch band theory of generalized eigenvalue problems. Specifically, we show that eigenvalues of a transfer matrix lead to a certain condition imposed on the generalized Brillouin zone, which allows us to develop a theory to calculate the continuum bands. As a concrete example, we examine the non-Hermitian skin effect of photonic crystals composed of chiral metamaterials by invoking our theoretical framework. When the medium has circularly polarized eigenmodes, we find that each eigenmode localizes at either of the edges, depending on whether it is left- or right-circularly polarized. In contrast, when the medium only has linearly polarized eigenmodes, every eigenmode localizes to the edge of the same side independent of its polarization. We demonstrate that the localization lengths of those eigenmodes can be determined from the chiral parameters and eigenfrequencies of the photonic crystal.
description: 10 pages, 4 figures
Supplemental material for: Turbulence causes kinematic and behavioural adjustments in a flapping flier
Creators: name: Lempidakis, Emmanouil
name: Ross, Andrew N.
name: Quetting, Michael
name: Krishnan, Krishnamoorthy
name: Garde, Baptiste
name: Wikelski, Martin
name: Shepard, Emily L. C.
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310299
subject: Bioinformatics and computational biology not elsewhere classified
classificationCode: 320203
subject: Clinical microbiology
classificationCode: 370108
subject: Meteorology

description: Tables and figures supporting the findings of the study. Tables S1- S3 and figures S1 - S5 present in detail the results of the statistical analysis using multivariate generalised additive mixed effect models (GAMMS). Figure S6 and S7 present the examination of a potential effect of route familiarity and turbulence on wingbeat frequency and flapping wing speed, respectively.
Supplementary Material - Partial Oxidation of Alkanes by Dioxiranes Formed in situ at Low Temperature from Partial oxidation of alkanes by dioxiranes formed in situ at low temperature
Creators: name: Yacob, Sara
name: Caulfield, Michael J.
name: Barckholtz, Timothy A.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences
subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering

description: Partial oxidation catalysts capable of efficiently operating at low temperatures may limit the over-oxidation of alkane substrates and thereby improve selectivity. This work focuses on examining alkane oxidation using completely metal-free organocatalysts, dioxiranes. Dioxiranes employed here are synthesized by oxidation of a ketone using a terminal oxidant, such as hydrogen peroxide. Our work generates the dioxirane in situ, so that the process can be catalytic with respect to the ketone. To date, we have demonstrated selective partial oxidation of adamantane using ketone catalysts resulting in yields upwards of 60% towards 1-adamantanol with greater than 99% selectivity. Furthermore, we have demonstrated that changing the electrophilic character of the ketone R groups to contain more electron-donating ligands facilitates the dioxirane ring formation and improves overall oxidation yields. Isotopic labelling studies using H218O2 show the preferential incorporation of an 18O label into the parent ketone, providing evidence for dioxirane intermediate formed in situ. The isotopic labelling studies, along with solvent effect studies, suggest the formation of peracetic acid as a reactive intermediate.
A complete characterization of connected Lie groups with the Approximation Property
Creators: name: Haagerup, Uffe
name: Knudby, Søren
name: de Laat, Tim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We give a complete characterization of connected Lie groups with the Approximation Property for groups (AP). To this end, we introduce a strengthening of property (T), that we call property (T*), which is a natural obstruction to the AP. In order to define property (T*), we first prove that for every locally compact group G, there exists a unique left invariant mean on the space of completely bounded Fourier multipliers of G. A locally compact group G is said to have property (T*) if this mean is a weak* continuous functional. After proving that the groups SL(3,R), Sp(2,R), and the universal covering of Sp(2,R) have property (T*), we address the question which connected Lie groups have the AP. A technical problem that arises when considering this question from the point of view of the AP is that the semisimple part of the global Levi decomposition of a connected Lie group need not be closed. Because of an important permanence property of property (T*), this problem vanishes. It follows that a connected Lie group has the AP if and only if all simple factors in the semisimple part of its Levi decomposition have real rank 0 or 1. Finally, we are able to establish property (T*) for all connected simple higher rank Lie groups with finite center.
description: 18 pages, more details were included in Sections 5 and 6 and some additional minor changes were made
Spherically symmetric vacuum solutions in 1-Parameter New General Relativity and their phenomenology
Creators: name: Asuküla, Helen
name: Bahamonde, Sebastian
name: Hohmann, Manuel
name: Karanasou, Vasiliki
name: Pfeifer, Christian
name: Rosa, João Luís
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we study spherically symmetric vacuum solutions in 1-parameter New General Relativity (NGR), a specific theory in teleparallel gravity which is constructed from the three possible quadratic scalars obtained from torsion with arbitrary coefficients satisfying the requirements for the absence of ghosts. In this class of modified theories of gravity, the observable effects of gravity result from the torsion rather than the curvature of the spacetime. Unlike in GR, where the fundamental quantity is the metric from which the Levi-Civita connection is derived, in teleparallel theories of gravity the fundamental variable is the tetrad, from which one constructs the metric and the teleparallel connection. We consider the most general tetrad for spherical symmetry and we derive the corresponding field equations. Under adequate assumptions, we find three different branches of vacuum solutions and discuss their associated phenomenology. In particular, we analyze the photon sphere, the classical tests of GR such as the light deflection, the Shapiro delay, and the perihelion shift, and also the Komar mass, while providing a detailed comparison with their Schwarzschild spacetime counterparts. Finally, we analyze how the observational imprints from accretion disks and shadows are affected in comparison with their GR counterparts, and conclude that the free parameters of the model might induce additional attractive or repulsive effects to the propagation of photons, depending on their values.
description: 17 pages, several figures, journal version
On the Structure Theorem for quasi-Hopf bimodules
Creators: name: Saracco, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W30

description: The Structure Theorem for Hopf modules states that if a bialgebra $H$ is a Hopf algebra (i.e. it is endowed with a so-called antipode) then every Hopf module $M$ is of the form ${M}^{\mathrm{co}{H}}\otimes H$, where ${M}^{\mathrm{co}{H}}$ denotes the space of coinvariant elements in $M$. Actually, it has been shown that this result characterizes Hopf algebras: $H$ is a Hopf algebra if and only if every Hopf module $M$ can be decomposed in such a way. The main aim of this paper is to extend this characterization to the framework of quasi-bialgebras by introducing the notion of preantipode and by proving a Structure Theorem for quasi-Hopf bimodules. We will also establish the uniqueness of the preantipode and the closure of the family of quasi-bialgebras with preantipode under gauge transformation. Then, we will prove that every Hopf and quasi-Hopf algebra (i.e. a quasi-bialgebra with quasi-antipode) admits a preantipode and we will show how some previous results, as the Structure Theorem for Hopf modules, the Hausser-Nill theorem and the Bulacu-Caenepeel theorem for quasi-Hopf algebras, can be deduced from our Structure Theorem. Furthermore, we will investigate the relationship between the preantipode and the quasi-antipode and we will study a number of cases in which the two notions are equivalent: ordinary bialgebras endowed with trivial reassociator, commutative quasi-bialgebras, finite-dimensional quasi-bialgebras.
description: Accepted Manuscript
Supplementary Text from Multi-scale mechanics of granular solids from grain-resolved X-ray measurements
Creators: name: R. C. Hurley
name: S. A. Hall
name: J. P. Wright
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Mechanical Engineering
subject: FOS: Mechanical engineering
subject: 30399 Macromolecular and Materials Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Description of the supplementary data.
Broad and durable antibody response after vaccination with inactivated SARS-CoV-2 in individuals with a history of 2003 SARS-CoV infection
Creators: name: Liang, Huang
name: Zheng, Peiyan
name: Wang, Qian
name: Deng, Yijun
name: Liang, Dan
name: Yi, Haisu
name: Cheng, Yuanyi
name: Zhao, Xinwei
name: Ma, Jing
name: Yang, Yidong
name: Hu, Peiyu
name: Zheng, Pingqian
name: Zhang, Yudi
name: Huang, Shuangshuang
name: Lin, Xiancheng
name: Ke, Changwen
name: Niu, Xuefeng
name: Sun, Baoqing
name: Chen, Ling
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: In vaccinees who were infected with SARS-CoV in 2003, we observed greater antibody responses against spike and nucleoprotein of both SARS-CoV-2 and SARS-CoV after a single dosage of inactivated SARS-CoV-2 vaccine. After receiving the second vaccination, antibodies against RBD of SARS-CoV-2 Wuhan, Beta, Delta, and recently emerged Omicron are significantly higher in SARS-CoV experienced vaccinees than in SARS-CoV naïve vaccinees. Neutralizing activities measured by authentic viruses and pseudoviruses of SARS-CoV, SARS-CoV-2 Wuhan, Beta, and Delta are greater in SARS-CoV experienced vaccinees. In contrast, only weak neutralizing activities against SARS-CoV-2 and variants were detected in SARS-CoV naïve vaccinees. By 6 months after the second vaccination, neutralizing activities were maintained at a relatively higher level in SARS-CoV experienced vaccinees but were undetectable in SARS-CoV naïve vaccinees. These findings suggested a great possibility of developing a universal vaccine by heterologous vaccination using spike antigens from different SARS-related coronaviruses.
Two lanostane triterpenoids with α-glucosidase inhibitory activity from the fruiting bodies of Ganoderma weberianum
Creators: name: Kong, De Xian
name: Yun, Qing
name: Yang, Li
name: Xie, Qing Yi
name: Deng, Chun Ying
name: Dai, Hao Fu
name: Hua, Yan
name: Zhao, You Xing
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: A new oxygenated lanostane-type triterpenoid, 20S,24S-epoxy-lanosta-7,9(11)-dien-3β,15α,25R,26-tetraol (1), together with three known compounds (2–4) were isolated from the fruiting bodies of Ganoderma weberianum. Extensive NMR spectrometry and HRESIMS analysis, as well as NMR and ECD calculations elucidated the structure of the new compound. 27-nor-3β-hydroxylanosta-7,9(11),23E-trien-25-one (2) showed superior α-glucosidase inhibitory activity with IC50 value of 122.1 μM to that of positive control acarbose (304.6 μM).
The effects of assembly bias on cosmological inference from galaxy-galaxy lensing and galaxy clusters
Creators: name: McEwen, Joseph E.
name: Weinberg, David H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The combination of galaxy-galaxy lensing (GGL) and galaxy clustering is a promising route to measuring the amplitude of matter clustering and testing modified gravity theories of cosmic acceleration. Halo occupation distribution (HOD) modeling can extend the approach down to nonlinear scales, but galaxy assembly bias could introduce systematic errors by causing the HOD to vary with large scale environment at fixed halo mass. We investigate this problem using the mock galaxy catalogs created by Hearin & Watson (2013, HW13), which exhibit significant assembly bias because galaxy luminosity is tied to halo peak circular velocity and galaxy colour is tied to halo formation time. The preferential placement of galaxies (especially red galaxies) in older halos affects the cutoff of the mean occupation function $\langle N_\text{cen}(M_\text{min}) \rangle$ for central galaxies, with halos in overdense regions more likely to host galaxies. The effect of assembly bias on the satellite galaxy HOD is minimal. We introduce an extended, environment dependent HOD (EDHOD) prescription to describe these results and fit galaxy correlation measurements. Crucially, we find that the galaxy-matter cross-correlation coefficient, $r_{gm} \equiv ξ_{gm} \cdot [ ξ_{mm} ξ_{gg} ]^{-1/2}$, is insensitive to assembly bias on scales $r \gtrsim 1 \; h^{-1}\text{Mpc}$, even though $ξ_{gm} $ and $ξ_{gg} $ are both affected individually. We can therefore recover the correct $ξ_{mm} $ from the HW13 galaxy-galaxy and galaxy-matter correlations using either a standard HOD or EDHOD fitting method. For $M_r \leq -19$ or $M_r \leq -20$ samples the recovery of $ξ_{mm}$ is accurate to 2% or better. For a sample of red $M_r \leq -20$ galaxies we achieve 2% recovery at $r \gtrsim 2\;h^{-1}\text{Mpc}$ with EDHOD modeling but lower accuracy at smaller scales or with a standard HOD fit.
description: Figure 17 conveys the key result; experts can start at the conclusions
Effects of glycerol and glucose on docosahexaenoic acid synthesis in Aurantiochyrium limacinum SFD-1502 by transcriptome analysis
Creators: name: Zhang, Huaqiu
name: Zhao, Xiangying
name: Zhao, Chen
name: Zhang, Jiaxiang
name: Liu, Yang
name: Yao, Mingjing
name: Liu, Jianjun
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Hematology

description: Docosahexaenoic acid (DHA) has numerous functions in adjusting the organic health and pragmatic value in medicine and food field. In this study, we compared glycerol and glucose as the only carbon source for DHA production by Aurantiochytrium. When the glycerol concentration was 120 g/L, the maximum DHA yield was 11.08 g/L, and the DHA yield increased significantly, reaching 47.67% of the total lipid content. When the cells grew in glucose, the DHA proportion was 37.39%. Transcriptome data showed that the glycolysis pathway and tricarboxylic acid cycle in Aurantiochytrium were significantly inhibited during glycerol culture, which promoted the tricarboxylic acid transport system and was conducive to the synthesis of fatty acids by acetyl coenzyme A; glucose as substrate activated fatty acid synthesis (FAS)pathway and produced more saturated fatty acids, while glycerol as substrate activated polyketide synthase (PKS)pathway and produced more long-chain polyunsaturated fatty acids. This laid a foundation for fermentation metabolism regulation and molecular transformation.
Dynamically emergent correlations between particles in a switching harmonic trap
Creators: name: Biroli, Marco
name: Kulkarni, Manas
name: Majumdar, Satya N.
name: Schehr, Gregory
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a one dimensional gas of $N$ noninteracting diffusing particles in a harmonic trap, whose stiffness switches between two values $μ_1$ and $μ_2$ with constant rates $r_1$ and $r_2$ respectively. Despite the absence of direct interaction between the particles, we show that strong correlations between them emerge in the stationary state at long times, induced purely by the dynamics itself. We compute exactly the joint distribution of the positions of the particles in the stationary state, which allows us to compute several physical observables analytically. In particular, we show that the extreme value statistics (EVS), i.e., the distribution of the position of the rightmost particle has a nontrivial shape in the large $N$ limit. The scaling function characterizing this EVS has a finite support with a tunable shape (by varying the parameters). Remarkably, this scaling function turns out to be universal. First, it also describes the distribution of the position of the $k$-th rightmost particle in a $1d$ trap. Moreover, the distribution of the position of the particle farthest from the center of the harmonic trap in $d$ dimensions is also described by the same scaling function for all $d \geq 1$. Numerical simulations are in excellent agreement with our analytical predictions.
description: Main text: 6 pages + Supp. Mat.: 16 pages
A multiscale approach for spatially inhomogeneous disease dynamics
Creators: name: Schmidtchen, Markus
name: Tse, Oliver
name: Wackerle, Stephan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper we introduce an agent-based epidemiological model that generalizes the classical SIR model by Kermack and McKendrick. We further provide a multiscale approach to the derivation of a macroscopic counterpart via the mean-field limit. The chain of equations acquired via the multiscale approach are investigated, analytically as well as numerically. The outcome of these results provide strong evidence of the models' robustness and justifies their applicability in describing disease dynamics, in particularly when mobility is involved.
A linear dispersion relation for the hybrid kinetic-ion/fluid-electron model of plasma physics
Creators: name: Told, Daniel
name: Cookmeyer, Tessa
name: Astfalk, Patrick
name: Jenko, Frank
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A dispersion relation for a commonly used hybrid model of plasma physics is developed, which combines fully kinetic ions and a massless-electron fluid description. Although this model and variations of it have been used to describe plasma phenomena for about 40 years, to date there exists no general dispersion relation to describe the linear wave physics contained in the model. Previous efforts along these lines are extended here to retain arbitrary wave propagation angles, temperature anisotropy effects, as well as additional terms in the generalized Ohm's law which determines the electric field. A numerical solver for the dispersion relation is developed, and linear wave physics is benchmarked against solutions of a full Vlasov-Maxwell dispersion relation solver. This work opens the door to a more accurate interpretation of existing and future wave and turbulence simulations using this type of hybrid model.
description: 24 pages, 10 figures, submitted to New Journal of Physics
Figure S1 from Desert mammal populations are limited by introduced predators rather than future climate change
Creators: name: Greenville, Aaron C.
name: Wardle, Glenda M.
name: Dickman, Chris R.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Figure S1: Eight month cumulative rainfall data for (a) actual dataset, (b) simulated dataset for current rainfall (n = 2000), and (c) simulated dataset for rainfall in 100 years.
Comparative study of gyrokinetic, hybrid-kinetic and fully kinetic wave physics for space plasmas
Creators: name: Told, Daniel
name: Cookmeyer, Tessa
name: Muller, Florian
name: Astfalk, Patrick
name: Jenko, Frank
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: A set of numerical solvers for the linear dispersion relations of the gyrokinetic, the hybrid-kinetic, and the fully kinetic model is employed to study the physics of the kinetic Alfvén wave and the fast magnetosonic mode in these models. In particular, we focus on parameters that are relevant for solar wind oriented applications (using a homogeneous, isotropic background), which are characterized by wave propagation angles averaging close to 90°. It is found that the gyrokinetic model, while lacking high-frequency solutions and cyclotron effects, faithfully reproduces the fully kinetic Alfvén wave physics close to, and sometimes significantly beyond, the boundaries of its range of validity. The hybrid-kinetic model, on the other hand, is much more complete in terms of high-frequency waves, but owing to its simple electron model it is found to severely underpredict wave damping rates even on ion spatial scales across a large range of parameters, despite containing full kinetic ion physics.
description: 22 pages, 12 figures, submitted to New J. Phys
Special classes of $q$-bracket operators
Creators: name: Wakhare, Tanay
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We study the $q$-bracket operator of Bloch and Okounkov when applied to $f(λ)=\sum_{λ_i \in λ}g(λ_i)$ and $f(λ)=\sum_{\substack{λ_i \in λλ_i \text{distinct} }}g(λ_i)$. We use these expansions to derive convolution identities for the functions $f$ and link both classes of $q$-brackets through divisor sums. As a result, we generalize Euler's classic convolution identity for the partition function and obtain an analogous identity for the totient function. As corollaries, we generalize Stanley's theorem as well as provide several new combinatorial results.
description: 8 pages
Higher Rank ABJM Wilson Loops from Matrix Models
Creators: name: Cookmeyer, Tessa
name: Liu, James T.
name: Zayas, Leopoldo A. Pando
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the vacuum expectation values of $1/6$ supersymmetric Wilson loops in higher dimensional representations of the gauge group in ABJM theory. We present results for the $m$-symmetric and $m$-antisymmetric representations by exploiting standard matrix model techniques. At leading order, in the saddle point approximation, our expressions reproduce holographic results from both D6 and D2 branes corresponding to the antisymmetric and symmetric representations, respectively. We also compute 1/N corrections to the leading saddle point results.
description: 17 pages, 5 figures
Figure S2 from Desert mammal populations are limited by introduced predators rather than future climate change
Creators: name: Greenville, Aaron C.
name: Wardle, Glenda M.
name: Dickman, Chris R.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Figure S2: Years since wildfire for data for (a) actual dataset, (b) simulated dataset for current rainfall (n = 2000), and (c) simulated dataset for wildfire in 100 years.
Nonlinear Unknown Input Observability: The General Analytic Solution
Creators: name: Martinelli, Agostino
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Observability is a fundamental structural property of any dynamic system and describes the possibility of reconstructing the state that characterizes the system from observing its inputs and outputs. Despite the huge effort made to study this property, there is no general analytical criterion to automatically check the state observability when the dynamics are also driven by unknown inputs. Here, we introduce the general analytical solution of this fundamental problem, often called the unknown input observability problem. We provide the systematic procedure, based on automatic computation (differentiation and matrix rank determination), that allows us to automatically check the state observability even in the presence of unknown inputs. The fundamental step to obtain this solution is the introduction of the group of invariance of observability. We introduce the group of transformations under which observability is invariant. Based on this group, we introduce new tensor fields with respect to this group of transformations. The analytical solution of the unknown input observability problem is expressed in terms of these tensors. This paper provides this solution together with the main analytical steps for its derivation and a sketch of the proof of its validity. A complete derivation, together with additional important properties, is available in [45]. On the other hand, this paper also provides a more general solution than the one presented in [45] by exhaustively dealing with the systems that do not belong to the category of the systems that are canonic with respect to their unknown inputs. This solution is also provided in the form of a new algorithm. We illustrate the implementation of the new algorithm by studying the observability properties of a nonlinear system in the framework of visual-inertial sensor fusion.
description: I withdraw this Preprint because in the new Preprint arXiv:2201.07610, which simultaneously deals with the problem of unknown input observability and unknown input reconstruction, there is also an updated version of the solution of the unknown input observability problem
Can transphobia within the LGBTQ+ community be predicted by Inter-group anxiety, negative stereotyping and Inter-group climate.
Creators: name: Taylor, Bethanie
Publisher: name: OSF Registries
Year: 2019

description: All factors within inter-group climate model will together predict Attitudes (prejudice) towards Trans* individuals and all the factors within inter-group climate will correlate with attitudes towards trans individuals.
 Inter-group anxiety and negative stereotypes will also predict attitudes within the LGBTQ+ community towards Trans* individuals
CNAM - Bernard Racimora
Creators: name: Leibowitch, Jacques (1942-2020)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: 1 fichier (6 pages). Pièce jointe : extraits du chapitre III du livre de J. Leibowitch Pour en finir avec le sida
Table S3 from Desert mammal populations are limited by introduced predators rather than future climate change
Creators: name: Greenville, Aaron C.
name: Wardle, Glenda M.
name: Dickman, Chris R.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Table S3: Generalised linear mixed model results for each local model in the piecewise structural equation model.
Superexpanders from group actions on compact manifolds
Creators: name: de Laat, Tim
name: Vigolo, Federico
Publisher: name: arXiv
Year: 2017
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05C10, 05C12, 20F65, 46B85

description: It is known that the expanders arising as increasing sequences of level sets of warped cones, as introduced by the second-named author, do not coarsely embed into a Banach space as soon as the corresponding warped cone does not coarsely embed into this Banach space. Combining this with non-embeddability results for warped cones by Nowak and Sawicki, which relate the non-embeddability of a warped cone to a spectral gap property of the underlying action, we provide new examples of expanders that do not coarsely embed into any Banach space with nontrivial type. Moreover, we prove that these expanders are not coarsely equivalent to a Lafforgue expander. In particular, we provide infinitely many coarsely distinct superexpanders that are not Lafforgue expanders. In addition, we prove a quasi-isometric rigidity result for warped cones.
description: 16 pages, to appear in Geometriae Dedicata
Applying Parabolic Peterson: Affine Algebras and the Quantum Cohomology of the Grassmannian
Creators: name: Cookmeyer, Tessa
name: Milićević, Elizabeth
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14M15, 05E05 (Primary), 20F55, 14N15, 14N35 (Secondary)

description: The Peterson isomorphism relates the homology of the affine Grassmannian to the quantum cohomology of any flag variety. In the case of a partial flag, Peterson's map is only a surjection, and one needs to quotient by a suitable ideal on the affine side to map isomorphically onto the quantum cohomology. We provide a detailed exposition of this parabolic Peterson isomorphism in the case of the Grassmannian of m-planes in complex n-space, including an explicit recipe for doing quantum Schubert calculus in terms of the appropriate subset of non-commutative k-Schur functions. As an application, we recast Postnikov's affine approach to the quantum cohomology of the Grassmannian as a consequence of parabolic Peterson by showing that the affine nilTemperley-Lieb algebra arises naturally when forming the requisite quotient of the homology of the affine Grassmannian.
description: 37 pages, most figures best viewed in color; typos corrected, sections reorganized, minor improvements to the exposition; version with condensed background section to appear in J. Comb
Optimized Multifidelity Machine Learning for Quantum Chemistry
Creators: name: Vinod, Vivin
name: Kleinekathöfer, Ulrich
name: Zaspel, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Machine learning (ML) provides access to fast and accurate quantum chemistry (QC) calculations for various properties of interest such as excitation energies. It is often the case that high accuracy in prediction using an ML model, demands a large and costly training set. Various solutions and procedures have been presented to reduce this cost. These include methods such as $Δ$-ML, hierarchical-ML, and multifidelity machine learning (MFML). MFML combines various $Δ$-ML like sub-models for various fidelities according to a fixed scheme derived from the sparse grid combination technique. In this work we implement an optimization procedure to combine multifidelity models in a flexible scheme resulting in optimized MFML (o-MFML) that provides superior prediction capabilities. This hyper-parameter optimization is carried out on a holdout validation set of the property of interest. This work benchmarks the o-MFML method in predicting the atomization energies on the QM7b dataset, and again in the prediction of excitation energies for three molecules of growing size. The results indicate that o-MFML is a strong methodological improvement over MFML and provides lower error of prediction. Even in cases of poor data distributions and lack of clear hierarchies among the fidelities, which were previously identified as issues for multifidelity methods, the o-MFML provides advantage to the prediction of quantum chemical properties.
description: SI not included
In-Place Initializable Arrays
Creators: name: Katoh, Takashi
name: Goto, Keisuke
Publisher: name: arXiv
Year: 2017
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: An initializable array is an array that supports the read and write operations for any element and the initialization of the entire array. This paper proposes a simple in-place algorithm to implement an initializable array of length $N$ containing $\ell \in O(w)$ bits entries in $N \ell +1$ bits on the word RAM model with $w$ bits word size, i.e., the proposed array requires only 1 extra bit on top of a normal array of length $N$ containing $\ell$ bits entries. Our algorithm supports the all three operations in constant worst-case time, that is, it runs in-place using at most constant number of words $O(w)$ bits during each operation. The time and space complexities are optimal since it was already proven that there is no implementation of an initializable array with no extra bit supporting all the operations in constant worst-case time [Hagerup and Kammer, ISAAC 2017]. Our algorithm significantly improves upon the best algorithm presented in the earlier studies [Navarro, CSUR 2014] which uses $N + o(N)$ extra bits to support all the operations in constant worst-case time.