cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Van Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice
Creators: name: Sala, G.
name: Stone, M. B.
name: Rai, Binod K.
name: May, A. F.
name: Laurell, Pontus
name: Garlea, V. O.
name: Butch, N. P.
name: Lumsden, M. D.
name: Ehlers, G.
name: Pokharel, G.
name: Mandrus, D.
name: Parker, D. S.
name: Okamoto, S.
name: Halász, Gábor B.
name: Christianson, A. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic excitation spectrum of the quantum magnet YbCl$_3$ is studied with inelastic neutron scattering. The spectrum exhibits an unusually sharp feature within a broad continuum, as well as conventional spin waves. By including both transverse and longitudinal channels of the neutron response, linear spin wave theory with a single Heisenberg interaction on the honeycomb lattice reproduces all of the key features in the spectrum. In particular, the broad continuum corresponds to a two-magnon contribution from the longitudinal channel, while the sharp feature within this continuum is identified as a Van Hove singularity in the joint density of states, which indicates the two-dimensional nature of the two-magnon continuum. We term these singularities magneto-caustic features in analogy with caustic features in ray optics where focused envelopes of light are generated when light passes through or reflects from curved or distorted surfaces. The experimental demonstration of a sharp Van Hove singularity in a two-magnon continuum is important because analogous features in potential two-spinon continua could distinguish quantum spin liquids from merely disordered systems. These results establish YbCl$_3$ as a nearly ideal two-dimensional honeycomb lattice material hosting strong quantum effects in the unfrustrated limit.
description: 17 pages, 5 figures
On the local étale fundamental group of KLT threefold singularities
Creators: name: Carvajal-Rojas, Javier
name: Stäbler, Axel
name: Kollár, János
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E30, 14B05, 13A35, 14E20

description: Let $S$ be KLT threefold singularity over an algebraically closed field of positive characteristic $p>5$. We prove that its local étale fundamental group is tame and finite. Further, we show that every finite unipotent torsor over a big open of $S$ is realized as the restriction of a finite unipotent torsor over $S$.
description: 34 pages, comments are welcome! General updates and corrections, including those from referees. Accepted at the Algebraic Geometry journal
Non-simplicial quantum toric varieties
Creators: name: Boivin, Antoine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53D20 (Primary) 81S10, 53D37 (Secondary)

description: In this paper, we define quantum toric varieties associated to an arbitrary fan in a finitely generated subgroup of some $\mathbb{R}^d$ generalizing the article arXiv:2002.03876 of Katzarkov, Lupercio, Meersseman and Verjovsky.
description: 35 pages, 2 figures
Gridding and Parameter Expansion for Scalable Latent Gaussian Models of Spatial Multivariate Data
Creators: name: Peruzzi, Michele
name: Banerjee, Sudipto
name: Dunson, David B.
name: Finley, Andrew O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Scalable spatial GPs for massive datasets can be built via sparse Directed Acyclic Graphs (DAGs) where a small number of directed edges is sufficient to flexibly characterize spatial dependence. The DAG can be used to devise fast algorithms for posterior sampling of the latent process, but these may exhibit pathological behavior in estimating covariance parameters. In this article, we introduce gridding and parameter expansion methods to improve the practical performance of MCMC algorithms in terms of effective sample size per unit time (ESS/s). Gridding is a model-based strategy that reduces the number of expensive operations necessary during MCMC on irregularly spaced data. Parameter expansion reduces dependence in posterior samples in spatial regression for high resolution data. These two strategies lead to computational gains in the big data settings on which we focus. We consider popular constructions of univariate spatial processes based on Matérn covariance functions and multivariate coregionalization models for Gaussian outcomes in extensive analyses of synthetic datasets comparing with alternative methods. We demonstrate effectiveness of our proposed methods in a forestry application using remotely sensed data from NASA's Goddard LiDAR, Hyper-Spectral, and Thermal imager (G-LiHT).
Effective elasticity of a flexible filament bound to a deformable cylindrical surface
Creators: name: Šarić, Andela
name: Pàmies, Josep C.
name: Cacciuto, Angelo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use numerical simulations to show how a fully flexible filament binding to a deformable cylindrical surface may acquire a macroscopic persistence length and a helical conformation. This is a result of the nontrivial elastic response to deformations of elastic sheets. We find that the filament's helical pitch is completely determined by the mechanical properties of the surface, and can be tuned by varying the filament binding energy. We propose simple scaling arguments to understand the physical mechanism behind this phenomenon and present a phase diagram indicating under what conditions one should expect a fully flexible chain to behave as a helical semi-flexible filament. Finally, we discuss the implications of our results.
Semiparametric Estimation in Continuous-Time: Asymptotics for Integrated Volatility Functionals with Small and Large Bandwidths
Creators: name: Yang, Xiye
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: This article studies the estimation of integrated volatility functionals, which is a semiparametric two-step estimation problem in the nonstationary continuous-time setting. We generalize the asymptotic normality results of Jacod and Rosenbaum to a wider range of bandwidths. Moreover, we employ matrix calculus to obtain a new analytical bias correction and variance estimation method. The proposed method gives more succinct expressions than the element-by-element analytical method of the above cited article. In addition, it has a computational advantage over the jackknife/simulation-based method proposed by Li, Liu, and Xiu. Comprehensive simulation studies demonstrate that our method has good finite sample performance for a variety of volatility functionals, including quadraticity, determinant, continuous beta, and eigenvalues.
Modeling Star counts in the Monoceros stream and the Galactic anti-centre
Creators: name: Hammersley, P. L.
name: Lopez-Corredoira, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: There is a continued debate as to the form of the outer disc of the Milky Way galaxy, which has important implications for its formation. Stars are known to exist at a galacto-centric distance of at least 20 kpc. However, there is much debate as to whether these stars can be explained as being part of the disc or whether another extra galactic structure, the so called Monoceros ring/stream, is required. To examine the outer disc of the Galaxy toward the anti-centre to determine whether the star counts can be explained by the thin and thick discs alone. Using Sloan star counts and extracting the late F and early G dwarfs it is possible to directly determine the density of stars out to a galacto-centric distance of about 25 kpc. These are then compared with a simple flared disc model. A flared disc model is shown to reproduce the counts along the line of sights examined, if the thick disc does not have a sharp cut off. The flare starts at a Galacto-centric radius of 16 kpc and has a scale length of 4.5+/-1.5 kpc. Whilst the interpretation of the counts in terms of a ring/stream cannot be definitely discounted, it does not appear to be necessary, at least along the lines of sight examined towards the anti centre.
description: 11 pages, 4 figures, accepted to be published in A&A
On the Hausdorff dimension of Furstenberg sets and orthogonal projections in the plane
Creators: name: Orponen, Tuomas
name: Shmerkin, Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 28A80 (Primary) 28A75, 28A78 (Secondary)

description: Let $0 \leq s \leq 1$ and $0 \leq t \leq 2$. An $(s,t)$-Furstenberg set is a set $K \subset \mathbb{R}^{2}$ with the following property: there exists a line set $\mathcal{L}$ of Hausdorff dimension $\dim_{\mathrm{H}} \mathcal{L} \geq t$ such that $\dim_{\mathrm{H}} (K \cap \ell) \geq s$ for all $\ell \in \mathcal{L}$. We prove that for $s\in (0,1)$, and $t \in (s,2]$, the Hausdorff dimension of $(s,t)$-Furstenberg sets in $\mathbb{R}^{2}$ is no smaller than $2s + ε$, where $ε> 0$ depends only on $s$ and $t$. For $s>1/2$ and $t = 1$, this is an $ε$-improvement over a result of Wolff from 1999.
 The same method also yields an $ε$-improvement to Kaufman's projection theorem from 1968. We show that if $s \in (0,1)$, $t \in (s,2]$ and $K \subset \mathbb{R}^{2}$ is an analytic set with $\dim_{\mathrm{H}} K = t$, then $$\dim_{\mathrm{H}} \{e \in S^{1} : \dim_{\mathrm{H}} π_{e}(K) \leq s\} \leq s - ε,$$ where $ε> 0$ only depends on $s$ and $t$. Here $π_{e}$ is the orthogonal projection to $\mathrm{span}(e)$.
description: 64 pages, 2 figures. v3: corrected and improved Proposition 5.2. To appear in Duke Math J
Varying-Coefficient Panel Data Models With Nonstationarity and Partially Observed Factor Structure
Creators: name: Dong, Chaohua
name: Gao, Jiti
name: Peng, Bin
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: In this article, we study a varying-coefficient panel data model with both nonstationarity and partially observed factor structure. Two approaches are proposed. The first approach proposed in the main text considers a sieve based method to estimate the unknown coefficients as well as the factors and loading functions simultaneously, while the second approach proposed in the online supplementary document involving the principal component analysis provides an alternative estimation method. We establish asymptotic properties for them, compare the asymptotic efficiency of the two estimation methods and examine the theoretical findings through extensive Monte Carlo simulations. In an empirical study, we use our newly proposed model and the first method to study the returns to scale of large U.S. commercial banks, where some overlooked modeling issues in the literature of production econometrics are addressed. Supplementary materials for this article are available online.
Wie süsse Alte sauer werden: Eine Sekundär- und Tertiärprävention von Diabetes mellitus Typ 2 mittels Ernährungsumstellung
Creators: name: Riesen, Daniela
Publisher: name: Zenodo
Year: 2020

description: Das Ziel der vorliegenden Masterarbeit ist es herauszufinden, wie im schweizerischen Gesundheitssystem eine erfolgreiche Tertiär- und Sekundärprävention bei Diabetes mellitus Typ 2 möglich wird. Es wird aufgezeigt, dass die Möglichkeit der Ernährungsumstellung zur DMT2-Prävention/Therapie gefördert werden sollte und dass die Voraussetzungen dafür im bestehenden Gesundheitssystem bereits gegeben sind. Als wirkungsvoll erweist sich ein Ausbau der interdisziplinären Zusammenarbeit zwischen Hausärzten /Hausärztinnen und der Ernährungsberatung. Ernährungsberater/ Ernährungsberaterinnen verfügen sowohl über das Wissen als auch über die zeitlichen Rahmenbedingungen, um Diabetespatienten bzw. Diabetespatientinnen bei ihrer Ernährungsumstellung zu begleiten. Der erarbeitete Ansatz verspricht einen nachhaltigen Beitrag zur Behandlung von DMT2-Betroffenen, eine vermehrt nicht-medikamentöse Therapieform (allgemein bei nichtübertragbaren, chronischen Krankheiten) und infolge eine massgebliche Senkung der Gesundheitskosten.
description: + Code Diss LU: hslusa mas pg + Fussnote: Master-Arbeit MAS Prävention und Gesundheitsförderung, Hochschule Luzern – Soziale Arbeit, 2020 + NL-Code: NLLUHSA202012
Propagation and oblique collision of electron-acoustic solitons in two-electron-populated quantum plasmas
Creators: name: Akbari-Moghanjoughi, M.
name: Ahmadzadeh-Khosroshahi, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Oblique interaction of small- but finite-amplitude KdV-type electron-acoustic solitary excitations is examined in an unmagnetized two-electron-populated degenerate quantum electron-ion plasma in the framework of quantum hydrodynamics model using the extended Poincaré-Lighthill-Kuo (PLK) perturbation method. Critical plasma parameter is found to distinguish the types of solitons and their interaction phase-shifts. It is shown that, depending on the critical quantum diffraction parameter $H_{cr}$, both compressive and rarefactive solitary excitations may exist in this plasma and their collision phase-shifts can be either positive or negative for the whole range of the collision angle $0
description: Accepted: Pramana Journal of Physics
Shannon theory for quantum systems and beyond: information compression for fermions
Creators: name: Perinotti, Paolo
name: Tosini, Alessandro
name: Vaglini, Leonardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the task of compression of fermionic quantum information. Due to the parity superselection rule, differently from the case of encoding of quantum information in qubit states, part of the information carried by fermionic systems is encoded in their delocalised correlations. As a consequence, reliability of a compression protocol must be assessed in a way that necessarily accounts also for the preservation of correlations. This implies that input/output fidelity is not a satisfactory figure of merit for fermionic compression schemes. We then discuss various aspects regarding the assessment of reliability of an encoding scheme, and show that entanglement fidelity in the fermionic case is capable of evaluating the preservation of correlations, thus revealing itself strictly stronger than input/output fidelity, unlike the qubit case. We then introduce a fermionic version of the source coding theorem showing that, as in the quantum case, the von Neumann entropy is the minimal rate for which a fermionic compression scheme exists, that is reliable according to the entanglement fidelity criterion.
description: 11 pages
Neural networks for quantum state tomography with constrained measurements
Creators: name: Ma, Hailan
name: Dong, Daoyi
name: Petersen, Ian R.
name: Huang, Chang-Jiang
name: Xiang, Guo-Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Systems and Control (eess.SY)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Quantum state tomography (QST) aiming at reconstructing the density matrix of a quantum state plays an important role in various emerging quantum technologies. Recognizing the challenges posed by imperfect measurement data, we develop a unified neural network(NN)-based approach for QST under constrained measurement scenarios, including limited measurement copies, incomplete measurements, and noisy measurements. Through comprehensive comparison with other estimation methods, we demonstrate that our method improves the estimation accuracy in scenarios with limited measurement resources, showcasing notable robustness in noisy measurement settings. These findings highlight the capability of NNs to enhance QST with constrained measurements.
Varying–Coefficient Panel Data Models with Nonstationarity and Partially Observed Factor Structure
Creators: name: Dong, Chaohua
name: Gao, Jiti
name: Peng, Bin
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: In this paper, we study a varying–coefficient panel data model with both nonstationarity and partially observed factor structure. Two approaches are proposed in this paper. The first approach proposed in the main text considers a sieve based method to estimate the unknown coefficients as well as the factors and loading functions simultaneously, while the second approach proposed in the online supplementary document involving the principal component analysis provides an alternative estimation method. We establish asymptotic properties for them, compare the asymptotic efficiency of the two estimation methods and examine the theoretical findings through extensive Monte Carlo simulations. In an empirical study, we use our newly proposed model and a method to study the returns to scale of large U.S. commercial banks, where some overlooked modelling issues in the literature of production econometrics are addressed.
Precision Medicine Conducted to Diagnose Pulmonary Infection via Metagenomic Next Generation Sequencing
Creators: name: 马众辉(Mazhonghui)
Publisher: name: CNGB
Year: 2021
Subjects: Metagenome
Multispecies
Medical

description: Sequencing data of lung tissue, dental plaque, and saliva from two patients with pulmonary infection were included
Interface growth in two dimensions: A Loewner-equation approach
Creators: name: Durán, Miguel A.
name: Vasconcelos, Giovani L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The problem of Laplacian growth in two dimensions is considered within the Loewner-equation framework. Initially the problem of fingered growth recently discussed by Gubiec and Szymczak [T. Gubiec and P. Szymczak, Phys. Rev. E 77, 041602 (2008)] is revisited and a new exact solution for a three-finger configuration is reported. Then a general class of growth models for an interface growing in the upper-half plane is introduced and the corresponding Loewner equation for the problem is derived. Several examples are given including interfaces with one or more tips as well as multiple growing interfaces. A generalization of our interface growth model in terms of ``Loewner domains,'' where the growth rule is specified by a time evolving measure, is briefly discussed.
description: To appear in Physical Review E
Effects of alpha-effect fluctuations on simple nonlinear dynamo models
Creators: name: Richardson, K. J.
name: Proctor, M. R. E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the interaction of a fluctuating alpha-effect with large-scale shear in a simple nonlinear 1-dimensional dynamo wave model. We firstly extend the calculations of Proctor (2007, MNRAS, 41, L39-L42) to include spatial variation of the fluctuations, and find that there can be a mechanism for magnetic field generation, even when the mean alpha is zero, provided the spatiotemporal spectrum of the fluctuations has an appropriate form. We investigate mean-field dynamo action when the new term arising from the fluctuations is non-zero, and present results concerning the stability and frequency of the solutions and parity selection in the nonlinear regime. The relation between the asymptotic theory and explicit simulation of a traditional mean-field model with a fluctuating function for the alpha-effect term is discussed.
description: 18 pages, 10 figures, accepted in GAFD Special Issue - Natural Dynamos
Constant mean curvature slicings of Kantowski-Sachs spacetimes
Creators: name: Heinzle, J. Mark
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate existence, uniqueness, and the asymptotic properties of constant mean curvature (CMC) slicings in vacuum Kantowski-Sachs spacetimes with positive cosmological constant. Since these spacetimes violate the strong energy condition, most of the general theorems on CMC slicings do not apply. Although there are in fact Kantowski-Sachs spacetimes with a unique CMC foliation or CMC time function, we prove that there also exist Kantowski-Sachs spacetimes with an arbitrary number of (families of) CMC slicings. The properties of these slicings are analyzed in some detail.
Supplementary material for: Deletion of the Prostaglandin EP4 Receptor in the Kidney Tubule of Mature Mice Alters Kidney Water Handling Only in Males
Creators: name: Fenton, Robert
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 310909
subject: Animal physiology - cell

description: All supplemental material from AJP Renal manuscript: Deletion of the Prostaglandin EP4 Receptor in the Kidney Tubule of Mature Mice Alters Kidney Water Handling Only in Males
title: Journal de bord de la campagne PUFFAlis, 18 mars - 02 avril 2017
Creators: name: Allain, V.
name: Borsa, Philippe
name: Lebourges-Dhaussy, Anne
name: Menkès , Christophe
name: Rodier, Martine
name: Varillon, David
name: Vilayleck, Mina
Publisher: name: Institut  de Recherche pour le Développement
Year: 2020
Subjects: subject: FOS: Natural sciences

description: Du 18 mars au 02 avril 2017 s'est déroulée la mission PUFFAlis à bord du navire océanographique Alis de l'IRD. Cette campagne s'inscrit dans la continuité d'expéditions océanographiques centrées sur les zones d'alimentation des oiseaux marins, effectuées précédemment en mer (MOMAlis) comme à terre sur la colonie de puffins de Gouaro Deva. Elle est aussi la prolongation des campagnes NECTAlis destinées à étudier la chaîne trophique océanique qui conduit aux thons. Six scientifiques ont embarqué pour échantillonner les différents niveaux de la chaîne trophique océanique du bassin de Nouvelle-Calédonie au large de Pindaï. En milieu de mission, une journée a été consacrée à la communication avec les lycéens de Pouembout et les services de l'environnement et des pêches de la Province nord. Le journal de bord de la mission est précédé du communiqué de presse diffusé à cette occasion.
Diffusive Nuclear Burning of Helium on Neutron Stars
Creators: name: Chang, Philip
name: Bildsten, Lars
name: Arras, Phil
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Diffusive nuclear burning of H by an underlying material capable of capturing protons can readily consume H from the surface of neutron stars (NSs) during their early cooling history. In the absence of subsequent accretion, it will be depleted from the photosphere. We now extend diffusive nuclear burning to He, motivated by the recent observation by Ho \& Heinke of a carbon atmosphere on the NS in the Cassiopeia A supernova remnant. We calculate the equilibrium structure of He on an underlying $α$ capturing material, accounting for thermal, mass defect, and Coulomb corrections on the stratification of material with the same zeroth order $μ_e = A/Z$. We show that Coulomb corrections dominate over thermal and mass defect corrections in the highly degenerate part of the envelope. We also show that the bulk of the He sits deep in the envelope rather than near the surface. Thus, even if the photospheric He abundance is low, the total He column could be substantially larger than the photospheric column, which may have implications for rapid surface evolution ($\approx 1$ yr timescales) of neutron stars. When nuclear reactions are taken into account, we find that for base temperatures $\gtrsim 1.6 \times 10^8$ K, He is readily captured onto C. As these high temperatures are present during the early stages of NS evolution, we expect that the primordial He is completely depleted from the NS surface like the case for primordial H. We also find that magnetic fields $\lesssim 10^{12}$ G do not affect our conclusions. Armed with the results of this work and our prior efforts, we expect that primordial H and He are depleted, and so any observed H or He on the surfaces of these NS must be due to subsequent accretion (with or without spallation). If this subsequent accretion can be prevented, the underlying mid-Z material would be exposed.
description: 10 pages, 5 figures, 1 table, submitted to ApJ
11/4-colorability of subcubic triangle-free graphs
Creators: name: Dvořák, Zdeněk
name: Lidický, Bernard
name: Postle, Luke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We prove that up to two exceptions, every connected subcubic triangle-free graph has fractional chromatic number at most 11/4. This is tight unless further exceptional graphs are excluded, and improves the known bound on the fractional chromatic number of subcubic triangle-free planar graphs.
description: 61 pages, 48 figures, revision and journal style
Distinct genomic landscape of colorectal mucinous carcinoma determined via comprehensive genomic profiling
Creators: name: 黄亮
Publisher: name: CNGB
Year: 2021
Subjects: Variation
Multiisolate
Medical

description: We aimed to describe the genomic landscape of MC and AMC in a large colorectal cancer cohort. Tumor samples from patients with MC, AMC, or AC were analyzed using next-generation sequencing.
冬眠黄鼠肠道微生物群落变化
Creators: name: 石淳
Publisher: name: CNGB
Year: 2021
Subjects: Raw sequence reads
Targeted loci environmental
Other
16s rRNA
Environment
肠道微生物

description: 本研究采集了冬眠前、冬眠中、激醒期、冬眠后2天的达乌尔黄鼠肠道粪便，采用16s扩增子检测了其微生物群落变化，以期为研究黄鼠冬眠过程中肠道微生物群落变化提供理论基础。
Mad-CASP：一种用于精确细胞功能研究的高通量蛋白质组学方法
Creators: name: 李思奇(Lisiqi)
Publisher: name: CNGB
Year: 2021
Subjects: Proteome
Multiisolate
Other
质谱蛋白质组学

description: 基于质谱的单细胞蛋白质组学技术
Analyzing the Low State of EF Eridani with Hubble Space Telescope Ultraviolet Spectra
Creators: name: Szkody, Paula
name: Mukadam, Anjum
name: Gaensicke, Boris T.
name: Campbell, Ryan K.
name: Harrison, Thomas E.
name: Howell, Steve B.
name: Holtzman, Jon
name: Walter, Frederick M.
name: Henden, Arne
name: Dillon, William
name: Boberg, Owen
name: Dealaman, Shannon
name: Perone, Christian S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Time-resolved spectra throughout the orbit of EF Eri during its low accretion state were obtained with the Solar Blind Channel on the Advanced Camera for Surveys onboard the Hubble Space Telescope. The overall spectral distribution exhibits peaks at 1500 and 1700A, while the UV light curves display a quasi-sinusoidal modulation over the binary orbit. Models of white dwarfs with a hot spot and cyclotron emission were attempted to fit the spectral variations throughout the orbit. A non-magnetic white dwarf with a temperature of ~10,000K and a hot spot with central temperature of 15,000K generally matches the broad absorptions at 1400 and 1600A with those expected for the quasimolecular H features H2 and H+2 . However, the flux in the core of the Lyalpha absorption does not go to zero, implying an additional component, and the flux variations throughout the orbit are not well matched at long wavelengths. Alternatively, a 9500K white dwarf with a 100 MG cyclotron component can fit the lowest (phase 0.0) fluxes, but the highest fluxes (phase 0.5) require an additional source of magnetic field or temperature. The 100 MG field required for the UV fit is much higher than that which fits the optical/IR wavelengths, which would support previous suggestions of a complex field structure in polars.
description: 32 pages including 16 figures and 2 tables, accepted in ApJ
Pinned planar p-elasticae
Creators: name: Miura, Tatsuya
name: Yoshizawa, Kensuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49Q10, 53A04, 33E05

description: Building on our previous work, we classify all planar $p$-elasticae under the pinned boundary condition, and then obtain uniqueness and geometric properties of global minimizers. As an application we establish a Li--Yau type inequality for the $p$-bending energy, and in particular discover a unique exponent $p \simeq 1.5728$ for full optimality. We also prove existence of minimal $p$-elastic networks, extending a recent result of Dall'Acqua--Novaga--Pluda.
description: 41 pages, 11 figures, final version
USC: Uncompromising Spatial Constraints for Safety-Oriented 3D Object Detectors in Autonomous Driving
Creators: name: Liao, Brian Hsuan-Cheng
name: Cheng, Chih-Hong
name: Esen, Hasan
name: Knoll, Alois
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this work, we consider the safety-oriented performance of 3D object detectors in autonomous driving contexts. Specifically, despite impressive results shown by the mass literature, developers often find it hard to ensure the safe deployment of these learning-based perception models. Attributing the challenge to the lack of safety-oriented metrics, we hereby present uncompromising spatial constraints (USC), which characterize a simple yet important localization requirement demanding the predictions to fully cover the objects when seen from the autonomous vehicle. The constraints, as we formulate using the perspective and bird's-eye views, can be naturally reflected by quantitative measures, such that having an object detector with a higher score implies a lower risk of collision. Finally, beyond model evaluation, we incorporate the quantitative measures into common loss functions to enable safety-oriented fine-tuning for existing models. With experiments using the nuScenes dataset and a closed-loop simulation, our work demonstrates such considerations of safety notions at the perception level not only improve model performances beyond accuracy but also allow for a more direct linkage to actual system safety.
description: Accepted by ITSC 2024, 8 pages (IEEE double column format), 7 figures, 2 tables
Coelichneumon singularis Berthoumieu 1892
Creators: name: Cheraghi, A.
name: Esfandiari, M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Coelichneumon
Coelichneumon singularis

description: Coelichneumon singularis Berthoumieu, 1892
 MATERIAL EXAMINED. Iran: Khuzestan Prov., Amir-Kabir Sugarcane Co., 7 m, 31°06'N 48°18'E, VIII-IX 2015, 25♀, 55♂; Debal-Khozaii Sugarcane Co., 8 m, 31°08'N 48°35'E, VIII-IX 2015, 52♀, 46♂.
DIAGNOSIS. Body length 10-14 mm, face width 1/1-1/2 × longer than its height, legs and metasomal segments brownish-red except dark red segment 1, lateral margin of scutellum white. Male. Reddish triangular clasper at tip of metasoam, metacoxa without scopa, pro- and mesocoxae more or less ivory, flagellum without ivory ring. Female. Ovipositor black, metacoxa ventrally with scopa, all coxae red, flagellum with an ivory ring.
 BIOLOGY. After collecting pupa of Sesamia cretica in the field, the wasps emerged from it in the laboratory a few days later. Sesamia cretica is most important pest of sugarcane in south-western Iran and identification of the new parasite Coelichneumon singularis would be significant in biological control of this sugarcane borer. Further studies are needed to investigate the efficiency of this wasp in the field. Currently the most important method for the control of Sesamia cretica in Khuzestan is releasing the egg parasitoid Telenomus busseolae Gahan, 1922 (Hymenoptera: Scelionidae).
description: Published as part of Cheraghi, A. & Esfandiari, M., 2016, The First Rearing Of Coelichneumon singularis (Berthoumieu, 1892) (Hymenoptera: Ichneumonidae) From The Sugarcane Borer Sesamia Cretica Lederer, 1857 (Lepidoptera: Noctuidae), pp. 14-15 in Far Eastern Entomologist 323 on pages 14-15, DOI: 10.5281/zenodo.10084272
ConvTransSeg: A Multi-resolution Convolution-Transformer Network for Medical Image Segmentation
Creators: name: Gong, Zhendi
name: French, Andrew P.
name: Qiu, Guoping
name: Chen, Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Convolutional neural networks (CNNs) achieved the state-of-the-art performance in medical image segmentation due to their ability to extract highly complex feature representations. However, it is argued in recent studies that traditional CNNs lack the intelligence to capture long-term dependencies of different image regions. Following the success of applying Transformer models on natural language processing tasks, the medical image segmentation field has also witnessed growing interest in utilizing Transformers, due to their ability to capture long-range contextual information. However, unlike CNNs, Transformers lack the ability to learn local feature representations. Thus, to fully utilize the advantages of both CNNs and Transformers, we propose a hybrid encoder-decoder segmentation model (ConvTransSeg). It consists of a multi-layer CNN as the encoder for feature learning and the corresponding multi-level Transformer as the decoder for segmentation prediction. The encoder and decoder are interconnected in a multi-resolution manner. We compared our method with many other state-of-the-art hybrid CNN and Transformer segmentation models on binary and multiple class image segmentation tasks using several public medical image datasets, including skin lesion, polyp, cell and brain tissue. The experimental results show that our method achieves overall the best performance in terms of Dice coefficient and average symmetric surface distance measures with low model complexity and memory consumption. In contrast to most Transformer-based methods that we compared, our method does not require the use of pre-trained models to achieve similar or better performance. The code is freely available for research purposes on Github: (the link will be added upon acceptance).
description: 12 pages, 5 figures, 4 tables, also submitted to IEEE-TMI
On trajectories of vortices in the compressible fluid on a two-dimensional manifold
Creators: name: Rozanova, Olga S.
name: Yu, Jui-Ling
name: Hu, Chin-Kun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 86A10

description: For the model of a compressible barotropic fluid on a two dimensional rotating Riemmanian manifold we discuss a special class of smooth solutions having a form of a steady non-singular vortex moving with a bearing field. The model can be obtained from the system of primitive equations governing the motion of air over the Earth surface after averaging over the height and therefore the solution obtained can be interpreted as a tropical cyclone which is known as a long time existing stable vortex. We consider approximations of $l$- plane and $β$ - plane used in geophysics for modeling of middle scale processes and equations on the whole sphere as well. We show that the solutions of the mentioned form satisfy the equations of the model either exactly or with a discrepancy which is small in a neighborhood of the trajectory of the center of vortex. We perform a numeric study of the change of the shape of the vortex affected by the neglecting the discrepancy term.
description: 19 pages, 10 figures
Deep Learning of Sea Surface Temperature Patterns to Identify Ocean Extremes
Creators: name: Prochaska, Xavier
Publisher: name: Zenodo
Year: 2021

description: 22nd GHRSST Science Team meeting (XXII), online, 7-11 June 2021 Full list of authors: J. Xavier Prochaska (UC Santa Cruz, Kavli IPMU, AAII, etc.), Peter Cornillon (URI), David Reiman (UC Santa Cruz; Deep Mind)
Gravity of quantum vacuum and the cosmological constant problem
Creators: name: Wang, Qingdi
Publisher: name: University of British Columbia
Year: 2018

description: We investigate the gravitational property of the quantum vacuum by treating its large energy density predicted by quantum field theory seriously and assuming that it does gravitate to obey the equivalence principle of general relativity. We find that the quantum vacuum would gravitate differently from what people previously thought. The consequence of this difference is an accelerating universe with a small Hubble expansion rate $H\propto \Lambda e^{-\beta\sqrt{G}\Lambda}\to 0$ instead of the previous prediction $H=\sqrt{8\pi G\rho^{vac}/3}\propto\sqrt{G}\Lambda^2\to\infty$ which was unbounded, as the high energy cutoff $\Lambda$ is taken to infinity. In this sense, at least the ``old'' cosmological constant problem would be resolved. Moreover, it gives the observed slow rate of the accelerating expansion as $\Lambda$ is taken to be some large value of the order of Planck energy or higher. This result suggests that there is no necessity to introduce the cosmological constant, which is required to be fine tuned to an accuracy of $10^{-120}$, or other forms of dark energy, which are required to have peculiar negative pressure, to explain the observed accelerating expansion of the Universe.
Multi-fidelity algorithms for the horizontal alignment problem in road design
Creators: name: Aziz, Mahdi
Publisher: name: University of British Columbia
Year: 2018

description: Multi-fidelity refers to methods that employ low fidelity and high fidelity models in their design so as to lower the computation time and obtain high accuracy simultaneously. In particular, the algorithms that use the multi-fidelity technique in their design adaptively controls the error of the objective function. As they reach better positions in the search space, they update the objective function and use a new version with better precision. In this thesis, we study the multi-fidelity algorithms for solving the horizontal alignment problem in road design. The algorithms that we study here are a generalized pattern search with adaptive precision control and a trust region algorithm for unconstrained problems with controlled error. At first, in order to make a fair comparison, we tune the parameters of each algorithm on 5 small roads. We then test the algorithms on 35 roads, ranging from small to very large roads. The results of the comparison demonstrate that the use of the multi-fidelity framework helps the horizontal alignment algorithms reduce their computation time by an average factor of 2.52 while preserving the quality of solutions.
Escola do futuro: perspetiva dos alunos de 1.º Ciclo do Ensino Básico
School of the future: students' perspective of 1st Cycle of Basic Education
Creators: name: Oliveira, Mónica
Publisher: name: Escola Superior de Educação de Paula Frassinetti - CIPAF
Year: 2018
Subjects: Escola; Alunos; Inovação pedagógica; Futuro

description: Este artigo pretende (re)pensar a Escola face aos desafios da contemporaneidade, ressaltando a mudança e a inovação como o caminho a trilhar para a sua (re)invenção. Entendemos que, para encontrar as respostas a estes desafios, é necessário auscultar os alunos sobre a Escola do Futuro, tendo por base os seguintes objetivos: i) perceber como os alunos perspetivam a Escola do Futuro; ii) coligir um conjunto de contributos de suporte à sua transformação. Trata-se de uma investigação de natureza qualitativa que envolve uma abordagem naturalista e interpretativa, onde se utilizou como recolha de dados a observação participante e a análise documental. No total, o projeto envolveu 90 crianças e 5 professores. Os dados recolhidos permitiram concluir que a Escola tem de ser objeto de uma (re)formulação atendendo aos desafios da atualidade.

Palavras-chave: Escola; Alunos; Inovação pedagógica; Futuro

School of the future: students' perspective of 1st Cycle of Basic Education

Abstract

This article intends to (re) think the School in the face of contemporary challenges, highlighting change and innovation as the way forward for its (re) invention. We understand that, in order to find the answers to these challenges, it is necessary to listen to the students about the School of the Future, based on the following objectives: i) to understand how the students are prospective of the School of the Future; ii) collect a set of support contributions to its transformation. It is an investigation of a qualitative nature that involves a naturalistic and interpretative approach, in which participant observation and documentary analysis were used as data collection. In total, the project involved 90 children and 5 teachers. The collected data allowed to conclude that the School has to be object of a (re) formulation taking into account the current challenges.

Keywords School, Students, Pedagogical innovation, Future
description: Saber & Educar, n. 24 (2018): A Educação Artística na Escola do Século XXI
Matrix Extreme Points and Free extreme points of Free spectrahedra
Creators: name: Epperly, Aidan
name: Evert, Eric
name: Helton, J. William
name: Klep, Igor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 47L07, 13J30. Secondary 46L07, 90C22

description: A spectrahedron is a convex set defined by a linear matrix inequality, i.e., the set of all $x \in \mathbb{R}^g$ such that \[ L_A(x) = I + A_1 x_1 + A_2 x_2 + \dots + A_g x_g \succeq 0 \] for some symmetric matrices $A_1,\ldots,A_g$. This can be extended to matrix spaces by taking $X$ to be a tuple of real symmetric matrices of any size and using the Kronecker product $$L_A(X) = I_n \otimes I_d + A_1 \otimes X_1 + A_2 \otimes X_2 + \dots + A_g \otimes X_g.$$ The solution set of $L_A (X) \succeq 0$ is called a \textit{free spectrahedron}. Free spectrahedra are important in systems engineering, operator algebras, and the theory of matrix convex sets. Matrix and free extreme points of free spectrahedra are of particular interest. While many authors have studied matrix and free extreme points of free spectrahedra, it has until now been unknown if these two types of extreme points are actually different. The results of this paper fall into three categories: theoretical, algorithmic, and experimental. Firstly, we prove the existence of matrix extreme points of free spectrahedra that are not free extreme. This is done by producing exact examples of matrix extreme points that are not free extreme. We also show that if the $A_i$ are $2 \times 2$ matrices, then matrix and free extreme points coincide. Secondly, we detail methods for constructing matrix extreme points of free spectrahedra that are not free extreme, both exactly and numerically. We also show how a recent result due to Kriel (Complex Anal.~Oper.~Theory 2019) can be used to efficiently test whether a point is matrix extreme. Thirdly, we provide evidence that a substantial number of matrix extreme points of free spectrahedra are not free extreme. Numerical work in another direction shows how to effectively write a given tuple in a free spectrahedron as a matrix convex combination of its free extreme points.
description: 66 pages
Instrument Noise, Retrieval Issues or Geophysical Signal?
Creators: name: Cornillon, Peter
Publisher: name: Zenodo
Year: 2021

description: Full list of authors: Peter Cornillon 1, Jörn Callis 2 & J. Xavier Prochaska 3
 1 Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA
 2 California Institute of Technology, Pasadena, CA 91125, USA
 3 Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
Monitoring-Crop-Water-Productivity-in-the-Mitidja-Plain,-Algeria-using-FAO-WaPOR-Data and-QGIS
Creators: name: Zoubida NEMER
name: Van Der Kwast, Hans
name: Mul, Marloes
name: Khaldaoui, Fatma
Publisher: name: Zenodo
Year: 2023
Subjects: QGIS
FAO WaPOR Data
Crop productivity
Groundwater
Sustainability

description: The presentation entitled "Monitoring Crop Water Productivity in the Mitidja Plain, Algeria using FAO WaPOR Data and QGIS" exemplifies the ways in which QGIS can be leveraged to analyze WaPOR data through the use of two plugins, thereby facilitating access to valuable information. The data are subsequently utilized to gain deeper insights into the complex relationship between crop productivity and the quantity and quality of groundwater employed for irrigation in the Mitidja Plain, situated in the northern region of Algeria. This innovative approach represents an initial step towards ensuring the sustainability of resources and improving water crop productivity in the area.
Asymptotic distributions and subsampling in spectral analysis for almost periodically correlated time series
Creators: name: Lenart, Łukasz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The aim of this article is to establish asymptotic distributions and consistency of subsampling for spectral density and for magnitude of coherence for non-stationary, almost periodically correlated time series. We show the asymptotic normality of the spectral density estimator and the limiting distribution of a magnitude of coherence statistic for all points from the bifrequency square. The theoretical results hold under $α$-mixing and moment conditions.
description: Published in at http://dx.doi.org/10.3150/10-BEJ269 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Simple and high-precision Hamiltonian simulation by compensating Trotter error with linear combination of unitary operations
Creators: name: Zeng, Pei
name: Sun, Jinzhao
name: Jiang, Liang
name: Zhao, Qi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Trotter and linear-combination-of-unitary (LCU) are two popular Hamiltonian simulation methods. We propose Hamiltonian simulation algorithms using LCU to compensate Trotter error, which enjoy both of their advantages. By adding few gates after the Kth-order Trotter, we realize a better time scaling than 2Kth-order Trotter. Our first algorithm exponentially improves the accuracy scaling of the Kth-order Trotter formula. In the second algorithm, we consider the detailed structure of Hamiltonians and construct LCU for Trotter errors with commutator scaling. Consequently, for lattice Hamiltonians, the algorithm enjoys almost linear system-size dependence and quadratically improves the accuracy of the Kth-order Trotter.
description: 44 pages, 17 figures. Comments are welcome