cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The effect of the skin-core structure of injection-molded isotactic polypropylene on the stress distribution in bending tests
Creators: name: Glüge, R.
name: N. Mahmood
name: I. Kolesov
name: H. Altenbach
name: M. Beiner
name: R. Androsch
Publisher: name: Otto von Guericke University Library, Magdeburg, Germany
Year: 2019

description: Technische Mechanik; 39; 3; 252-261; ISSN 2199-9244
description: We examine the effect of the skin-core structure of isotactic polypropylene (iPP) in bending tests. The depth-dependentmaterial properties are determined in tensile tests and mapped to a finite element model. This enables the examination of internalstresses during bending numerically. In a bending test, one usually expects a monotonic stress distribution across the thickness,provided that the material is homogeneous and does not strain-soften. We found that the structural gradient of injection-moldediPP easily overcompensates the monotonic stress dependence, such that the maximal equivalent von Mises stress lies well belowthe surface in the so called shear layer. The latter is a result of the injection molding process.
Understanding and tuning magnetism in layered Ising-type antiferromagnet FePSe3 for potential 2D magnet
Creators: name: Basnet, Rabindra
name: Patel, Taksh
name: Wang, Jian
name: Upreti, Dinesh
name: Chhetri, Santosh Karki
name: Acharya, Gokul
name: Nabi, Md Rafique Un
name: Sakon, Josh
name: Hu, Jin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent development in two-dimensional (2D) magnetic materials have motivated the search for new van der Waals magnetic materials, especially Ising-type magnets with strong magnetic anisotropy. Fe-based MPX3 (M = transition metal, X = chalcogen) compounds such as FePS3 and FePSe3 both exhibit an Ising-type magnetic order, but FePSe3 receives much less attention compared to FePS3. This work focuses on establishing the strategy to engineer magnetic anisotropy and exchange interactions in this less-explored compound. Through chalcogen and metal substitutions, the magnetic anisotropy is found to be immune against S substitution for Se whereas tunable only with heavy Mn substitution for Fe. In particular, Mn substitution leads to a continuous rotation of magnetic moments from the out-of-plane direction towards in-plane. Furthermore, the magnetic ordering temperature displays non-monotonic doping dependence for both chalcogen and metal substitutions but due to different mechanisms. These findings provide deeper insight into the Ising-type magnetism in this important van der Waals material, shedding light on the study of other Ising-type magnetic systems as well as discovering novel 2D magnets for potential applications in spintronics.
Additional file 1: of Deregulation of microRNA expression in monocytes and CD4+ T lymphocytes from patients with axial spondyloarthritis
Creators: name: Fogel, Olivier
name: Tinggaard, Andreas Bugge
name: Fagny, Maud
name: Sigrist, Nelly
name: Roche, Elodie
name: Leclere, Laurence
name: Jean-Franรงois Deleuze
name: Batteux, Frederic
name: Dougados, Maxime
name: Miceli-Richard, Corinne
name: Jรถrg Tost
Publisher: name: figshare
Year: 2019
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: MicroRNAs expression by real-time qPCR. Figure S1. Principal component analysis of microRNAs expression and hierarchical clustering analysis in the exploratory cohort (A, C) and in the replication cohort (B, D). Figure S2. Pathways analysis of significant differentially expressed miRs in monocytes (A) and CD4+ T lymphocytes (B). Figure S3. Flow chart for the selection of published study for the comparison analysis. Figure S4. Cluster analysis of differentially expressed miRs in published studies from literature. (DOCX 2104 kb)
Temperature Dependence of the Spin-Peierls Energy Gap and Anomalous Line Shapes in CuGeO$_3$
Creators: name: Martin, Michael C.
name: Shirane, G.
name: Fujii, Y.
name: Nishi, M.
name: Fujita, O.
name: Akimitsu, J.
name: Hase, M.
name: Uchinokura, K.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: Neutron scattering measurements on a large single crystal of CuGeO$_3$ have been used to determine the temperature-dependence of the spin-Peierls energy gap. While the power law behavior of the intensity of structural superlattice peaks is well fit by $I({\rm T})\propto ({\rm T}_c - {\rm T})^{2β}$ with an exponent of $β=0.33$, the exponent for the temperature dependence of the energy gap is significantly smaller than expected for conventional spin-Peierls materials. Usual scaling relations relate the energy gap to the superlattice reflection intensity as $Δ({\rm T}) \propto I^a$ with $a=1/3$; the present results suggest an exponent of $a\approx 1/6$ for CuGeO$_3$. Additional scattering cross-section is observed in constant-$q$ and constant-$E$ scans creating a long `tail' extending to higher energies relating to a proposed scattering continuum.
description: 10 pages, RevTeX, 6 postscript figures included, also available from http://insti.physics.sunysb.edu/~mmartin/pubs.html
Robotic Ship Hull Inspection For Damage Repair
Creators: name: Fitzgerald, Luke
name: WEIR, ANTHONY
name: Duraibabu, Dinesh Babu
name: OMERDIC, EDIN
name: DOOLY, GERARD
name: TOAL, DANIEL
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: In this paper, we investigate the methods to be used in the inspection of damaged ship hulls in water at sea, as part of the European Union (EU) Robotic Survey, Repair and Agile Manufacture (RESURGAM) Project. Employing underwater robotics equipped with camera or laser sensors, along with robust control and positioning systems, 3D models of the damaged section(s) can be produced with a goal of providing sufficientinformation for the subsequent design of repair patch(es), and ultimately the application of this repair to the ship. This work will allow damaged ships at sea to seek repair without the need for access to a dry dock. Preliminary results from recent field operations are included in this paper, with further field research to be carried out later this year.
Ab initio theory of the Gibbs free energy and a hierarchy of local moment correlation functions in itinerant electron systems: The magnetism of Mn$_3$A materials class
Creators: name: Mendive-Tapia, Eduardo
name: Staunton, Julie B
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an \textit{ab-initio} disordered local moment theory for the Gibbs free energy of a magnetic material. Two central objects are calculated: the lattice Fourier transform of the direct local moment - local moment correlation functions in the paramagnetic state and local internal magnetic fields as functions of magnetic order. We identify the potentially most stable magnetic phases from the first, which can include non-collinear and long-period states in complex multi-atom unit cells, and extract higher order correlations among the local moments from the second. We propose that these latter entities produce a picture of effective multi-site magnetic interactions depending on the state and extent of magnetic order and discuss its relation to other approaches. We show how magnetic phase diagrams for temperature, magnetic field, and lattice structure and also magnetocaloric and mechanocaloric effects can be obtained from this approach. The theory accurately predicts the order of transitions and quantifies contributions to first-order and order-order magnetic phase transitions from both purely electronic sources and magnetoelastic effects. Our case study is the apparently frustrated magnetism of the Mn$_3$A class of materials in all its cubic, hexagonal, and tetragonal structures. The theory produces magnetic phases and transition temperatures in good agreement with experiment. We explain the first-order triangular antiferromagnetic to collinear antiferromagnetic transition in cubic Mn$_3$Pt as a magnetovolume driven effect, and its absence for A=Ir and Rh. We also construct the magnetic phase diagram of Mn$_3$Pt and explore its potential as a barocaloric material. Finally, we prepare the groundwork for future fully relativistic studies of the temperature dependence of the magnetism of Mn$_3$A, including Mn$_3$Sn, Mn$_3$Ga, and Mn$_3$Ge.
description: 20 pages, 8 figures, 3 tables
Wave scattering from self-affine surfaces
Creators: name: Simonsen, Ingve
name: Vandembroucq, Damien
name: Roux, Stephane
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Electromagnetic wave scattering from a perfectly reflecting self-affine surface is considered. Within the framework of the Kirchhoff approximation, we show that the scattering cross section can be exactly written as a function of the scattering angle via a centered symmetric Levy distribution for general roughness amplitude, Hurst exponent and wavelength of the incident wave. The amplitude of the specular peak, its width and its position are discussed as well as the power law decrease (with scattering angle) of the scattering cross section.
description: RevTeX, 4 pages including 2 figures. Submitted Phys. Rev. Lett
Schauder estimates for Poisson equations associated with non-local Feller generators
Creators: name: Kühn, Franziska
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 60J25, 45K05, 35B65, 60J35, 60J75

description: We show how Hölder estimates for Feller semigroups can be used to obtain regularity results for solutions to the Poisson equation $Af=g$ associated with the (extended) infinitesimal generator $A$ of a Feller process. The regularity of $f$ is described in terms of Hölder-Zygmund spaces of variable order and, moreover, we establish Schauder estimates. Since Hölder estimates for Feller semigroups have been intensively studied in the last years, our results apply to a wide class of Feller processes, e.g. random time changes of Lévy processes and solutions to Lévy-driven stochastic differential equations. Most prominently, we establish Schauder estimates for the Poisson equation associated with the fractional Laplacian of variable order. As a by-product, we obtain new regularity estimates for semigroups associated with stable-like processes.
Two-loop gluon diagrams from string theory
Creators: name: Magnea, Lorenzo
name: Russo, Rodolfo
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We briefly review the string technology needed to calculate Yang-Mills amplitudes at two loops, and we apply it to the evaluation of two-loop vacuum diagrams.
description: 5 pages, LaTeX (AIP), talk presented by L. Magnea at DIS 97, Chicago
Additive Manufactured and Topology Optimized Permanent Magnet Spin-Rotator for Neutron Interferometry Applications
Creators: name: Kersten, Wenzel
name: Brandl, Laurids
name: Wagner, Richard
name: Huber, Christian
name: Bruckner, Florian
name: Hasegawa, Yuji
name: Suess, Dieter
name: Sponar, Stephan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In neutron interferometric experiments using polarized neutrons coherent spin-rotation control is required. In this letter we present a new method for Larmor spin-rotation around an axis parallel to the outer guide field using topology optimized 3D printed magnets. The use of 3D printed magnets instead of magnetic coils avoids unwanted inductances and offers the advantage of no heat dissipation, which prevents potential loss in interferometric contrast due to temperature gradients in the interferometer. We use topology optimization to arrive at a design of the magnet geometry that is optimized for homogeneity of the magnetic action over the neutron beam profile and adjustability by varying the distance between the 3D printed magnets. We verify the performance in polarimetric and interferometric neutron experiments.
description: 8 pages, 12 figures
A new lanostane-type triterpenoid from the marine shellfish symbiotic fungus Ceriporia lacerata CD7-5
Creators: name: Fang, Sheng-Tao
name: Miao, Feng-Ping
name: Yin, Xiu-Li
name: Ji, Nai-Yun
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: One new lanostane-type triterpenoid, 3β-acetoxy-7,11-dioxolanosta-8,24-dien-21-oic acid (1), together with six known analogues (2–7), were isolated from the cultures of a marine fungus Ceriporia lacerata CD7-5, which was derived from the shellfish Ostrea denselamellosa. Their structures were determined by detailed analysis of spectroscopic data and comparison with the literature reported. The biological activities of these lanostane triterpenoids against marine-derived microalgae, zooplankton, and pathogenic bacteria were also evaluated in this study.
Switching of Geometric Phase in Degenerate Systems
Creators: name: Yahalom, Asher
name: Englman, Robert
Publisher: name: arXiv
Year: 2000
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The geometric and open path phases of a four-state system subject to time varying cyclic potentials are computed from the Schrödinger equation. Fast oscillations are found in the non-adiabatic case. For parameter values such that the system possesses degenerate levels, the geometric phase becomes anomalous, undergoing a sign switch. A physical system to which the results apply is a molecular dimer with two interacting electrons. Additionally, the sudden switching of the geometric phase promises to be an efficient control in two-qubit quantum computing.
description: 15 pages, 4 figures,accepted by Physics Letters A (2000)
แนวคิดและผลงานการออกแบบสถาปัตยกรรมของธิติ เฮงรัศมี
Creators: name: สันต์ จันทร์สมศักดิ์
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2019
Subjects: Dithi Hengrasmee
modern tropical architecture
northeast region of Thailand

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 18, 2, 51-64
ЗУЛФИЯХОНИМ - ШЕЪРИЯТ ТОНГИНИНГ ОФТОБИ
Creators: name: Холбоева, Дилрузабегим
Publisher: name: Zenodo
Year: 2024

description: Зулфия деганда кўз олдимизга вафога, садоқатга тўла шеърий сатрлар гавдаланади. Бу вафо ва садоқат туйғулари истеъдодли, машҳур шоир Ҳамид Олимжонга аталган, муҳаббат жо бўлган сатрлар эди. Мазкур мақолада Шоира ижодида асосий мавзулар ва ишққа тўла шеърий мисраларга эътибор қаратилган.
Polarization effects on light propagation in gravitational fields
Creators: name: Vadapalli, Venkata Rama Raju
Publisher: name: Macquarie University
Year: 2024
Subjects: classificationCode: 510105
subject: General relativity and gravitational waves

description: The effects of a gravitational field on the propagation of electromagnetic waves in a vacuum are typically analyzed using geometric optics. In this approach, high-frequency electromagnetic waves are treated as rays that follow null geodesics. However, this model is only precisely accurate when light frequencies approach infinity. For finite frequencies, there exists a polarization-dependent deviation known as the gravitational spin-Hall effect of light. This effect becomes particularly significant when considering propagation over substantial astronomical distances and emissions from regions with strong gravitational fields, especially for radio and microwaves.
We use a recently developed covariant spin-optics method to investigate this effect in Schwarzschild spacetimes. These provide both the simplest mathematical setting that gives a chance to obtain analytical results that are important for qualitative understanding of the phenomena, and adequate description for the Solar-system observations. We conduct perturbative calculations, starting from exact solutions for null geodesics. As a result, we derive explicit expressions for the resulting trajectories and assess the magnitude of the effect concerning the gravitational deflection of light.
Key findings are as follows: (1) Polarization-induced corrections are absent for radially propagating light. (2) The corrections occur orthogonally to the plane of the unperturbed geodesic trajectory. (3) These corrections are particularly significant for low-energy electromagnetic waves, such as radio waves, and may even be observable with the current technology.
Space very long baseline interferometry in China
Creators: name: An, Tao
name: Hong, Xiaoyu
name: Zheng, Weimin
name: Ye, Shuhua
name: Qian, Zhihan
name: Fu, Li
name: Guo, Quan
name: Jaiswal, Sumit
name: Kong, Dali
name: Lao, Baoqiang
name: Liu, Lei
name: Liu, Qinghui
name: Lv, Weijia
name: Mohan, Prashanth
name: Shen, Zhiqiang
name: Wang, Guangli
name: Wu, Fang
name: Wu, Xiaocong
name: Zhang, Juan
name: Zhang, Zhongli
name: Zheng, Zhenya
name: Zhong, Weiye
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Space very long baseline interferometry (VLBI) has unique applications in high-resolution imaging of fine structure of astronomical objects and high-precision astrometry due to the key long space-Earth or space-space baselines beyond the Earth's diameter. China has been actively involved in the development of space VLBI in recent years. This review briefly summarizes China's research progress in space VLBI and the future development plan.
description: published in Advances in Space Research, special issue (Space VLBI)
An Anderson Impurity in a Semiconductor
Creators: name: Yu, Clare C.
name: Guerrero, M.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We study an Anderson impurity in a semiconducting host using the density matrix renormalization group technique. We use the $U=0$ one--dimensional Anderson Hamiltonian at half filling as the semiconducting host since it has a hybridization gap. By varying the hybridization of the host, we can control the size of the semiconducting gap. We consider chains with 25 sites and we place the Anderson impurity (with $U>0$) in the middle of the chain. We dope the half--filled system with one hole and we find two regimes: when the hybridization of the impurity is small, the hole density and the spin are localized near the impurity. When the hybridization of the impurity is large, the hole and spin density are spread over the lattice. Additional holes avoid the impurity and are extended throughout the lattice. Away from half--filling, the semiconductor with an impurity is analogous to a double well potential with a very high barrier. We also examine the chemical potential as a function of electron filling, and we find that the impurity introduces midgap states when the impurity hybridization is small.
description: Revtex + figures uuencoded
Overapproximation of Non-Linear Integer Arithmetic for Smart Contract Verification
Creators: name: Hozzová, Petra
name: Bendík, Jaroslav
name: Nutz, Alexander
name: Rodeh, Yoav
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The need to solve non-linear arithmetic constraints presents a major obstacle to the automatic verification of smart contracts. In this case study we focus on the two overapproximation techniques used by the industry verification tool Certora Prover: overapproximation of non-linear integer arithmetic using linear integer arithmetic and using non-linear real arithmetic. We compare the performance of contemporary SMT solvers on verification conditions produced by the Certora Prover using these two approximations against the natural non-linear integer arithmetic encoding. Our evaluation shows that the use of the overapproximation methods leads to solving a significant number of new problems.
description: 13 pages, 2 figures, presented at The International Conference on Logic for Programming, Artificial Intelligence and Reasoning (LPAR) 2023
Additional file 5: of A comparative transcriptome analysis of the novel obligate methanotroph Methylomonas sp. DH-1 reveals key differences in transcriptional responses in C1 and secondary metabolite pathways during growth on methane and methanol
Creators: name: Nguyen, Anh
name: Donghyuk Kim
name: Lee, Eun
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Figure S1. Phylogenetic tree of phosphoenolpyruvate carboxylases. Sequence identifiers follow by species label. Node in red indicated “non-regulated” type and node in green indicated “regulated” type of ppc. Sequences were aligned and tree was created with ClustalX2 2.1 and rendered with iTOL. (DOCX 146 kb)
Pion Exchange and the H1 Forward Spectrometer Data
Creators: name: Thomas, A. W.
name: Boros, C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We point out that the $Δπ$ component of the nucleon wave function is vital to the interpretation of the recent H1 data for leading baryon production. While the $n/p$ ratio is equal to two with the $Nπ$ component alone, the inclusion of the $Δπ$ component brings this ratio very near to unity, as observed in the experiment. This result demonstrates that pion exchange can not only account for leading neutron but also for a large fraction of the leading proton production.
description: title changed, new references added
The Bloch-Nordsieck propagator at finite temperature
Creators: name: Blaizot, Jean-Paul
name: Iancu, Edmond
name: Theorique, Service de Physique
name: Saclay
name: France
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have shown recently that the resummation of soft photon contributions leads to a non-exponential decay of the fermion excitations in hot QED plasmas. The retarded propagator of a massless fermion was found to behave as $S_R(t >> 1/gT) \sim \exp{-αT t [\ln(ω_p t) + C]}$, where $ω_p=gT/3$ is the plasma frequency, $α=g^2/4π$, and $C$ is a constant, independent of $g$, which was left undefined. This term is computed in this paper. In gauges with unphysical degrees of freedom, it is gauge-fixing independent provided an infrared regulator is introduced in the gauge sector. We also extend our analysis to hot QCD and express the quark and gluon propagators in the form of three-dimensional Euclidean functional integrals which may be evaluated on the lattice.
description: LaTex file, 35 pages, 6 eps figures included
Efficient magic state factories with a catalyzed |CCZ> to 2|T> transformation
Creators: name: Gidney, Craig
name: Fowler, Austin G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present magic state factory constructions for producing $|CCZ\rangle$ states and $|T\rangle$ states. For the $|CCZ\rangle$ factory we apply the surface code lattice surgery construction techniques described by Fowler et al. to the fault-tolerant Toffoli. The resulting factory has a footprint of $12d \times 6d$ (where $d$ is the code distance) and produces one $|CCZ\rangle$ every $5.5d$ surface code cycles. Our $|T\rangle$ state factory uses the $|CCZ\rangle$ factory's output and a catalyst $|T\rangle$ state to exactly transform one $|CCZ\rangle$ state into two $|T\rangle$ states. It has a footprint 25% smaller than the factory of Fowler et al. but outputs $|T\rangle$ states twice as quickly. We show how to generalize the catalyzed transformation to arbitrary phase angles, and note that the case $θ=22.5^\circ$ produces a particularly efficient circuit for producing $|\sqrt{T}\rangle$ states. Compared to using the $12d \times 8d \times 6.5d$ $|T\rangle$ factory of Fowler et al., our $|CCZ\rangle$ factory can quintuple the speed of algorithms that are dominated by the cost of applying Toffoli gates, including Shor's algorithm and the chemistry algorithm of Babbush et al.. Assuming a physical gate error rate of $10^{-3}$, our CCZ factory can produce $\sim 10^{10}$ states on average before an error occurs. This is sufficient for classically intractable instantiations of the chemistry algorithm, but for more demanding algorithms such as Shor's algorithm the mean number of states until failure can be increased to $\sim 10^{12}$ by increasing the factory footprint ~20%.
description: 24 pages, 19 figures, 7 ancillary files
Kinetics of a Diffusive Capture Process: Lamb Besieged by a Pride of Lions
Creators: name: Krapivsky, P. L.
name: Redner, S.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The survival probability, S_N(t), of a diffusing prey (``lamb'') in the proximity of N diffusing predators (a ``pride of lions'') in one dimension is investigated. When the lions are all to one side of the lamb, the survival probability decays as a non-universal power law, S_N(t) is proportional to t^{-beta_N}, with the decay exponent beta_N proportional to ln N. The crossover behavior as a function of the relative diffusivities of the lions and the lamb is also discussed. When N--->oo, the lamb survival probability exhibits a log-normal decay, exp(-ln^2 t).
description: 12 pages, no figures, macro files prepended, to be submitted to J. Phys. A
Additional file 1: of The role of scientific evidence in decisions to adopt complex innovations in cancer care settings: a multiple case study in Nova Scotia, Canada
Creators: name: R. Urquhart
name: C. Kendell
name: L. Geldenhuys
name: A. Ross
name: M. Rajaraman
name: A. Folkes
name: L. Madden
name: V. Sullivan
name: D. Rayson
name: G. Porter
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Marine Biology
subject: Cancer
subject: Science Policy

description: Draft Interview Guide: Clinician or administrator involved in the adoption process. (DOC 29 kb)
Design and synthesis of a new bioactive compound for marine antifouling inspired by natural products
Creators: name: Zheng, Jiyong
name: Gao, Haiping
name: Zhang, Guanglong
name: Sun, Zhiyong
name: Zhang, Jinwei
name: Wang, Li
name: Lin, Cunguo
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: A marine antifouling compound, N-octyl-2-hydroxybenzamide (OHBA), inspired by ceramide and paeonol molecules, was created. First, methyl salicylate was synthesized with salicylic acid and methanol, followed by n-octylamine through an ester-amine condensation reaction. Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and mass spectrometry confirmed the characteristic structure of the OHBA compound. Bioassays showed that OHBA inhibits the growth of typical marine fouling organisms, such as Vibrio azureus, Navicula subminuscula, Ulva pertusa, Mytilus edulis, and Amphibalanus amphitrite, indicating its broad-spectrum antifouling ability. A one-year marine real-sea test further demonstrated the excellent antifouling properties of OHBA. OHBA is also extremely biodegradable, with a half-life of 6.3 days, making it a less environmentally harmful replacement for widely-used heavy metal-containing antifoulants.
Localized magnetoplasmon modes arising from broken translational symmetry in semiconductor superlattices
Creators: name: Reina, J. H.
name: Granada, J. C.
name: Johnson, N. F.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The electromagnetic propagator associated with the localized collective magnetoplasmon excitations in a semiconductor superlattice with broken translational symmetry, is calculated analytically within linear response theory. We discuss the properties of these collective excitations in both radiative and non-radiative regimes of the electromagnetic spectra. We find that low frequency retarded modes arise when the surface density of carriers at the symmetry breaking layer is lower than the density at the remaining layers. Otherwise a doublet of localized, high-frequency magnetoplasmon-like modes occurs.
description: Revtex file + separate pdf figures
The exact phase diagram for a semipermeable TASEP with nonlocal boundary jumps
Creators: name: Aas, Erik
name: Ayyer, Arvind
name: Linusson, Svante
name: Potka, Samu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82C22, 82C23, 82C26, 60J27

description: We consider a finite one-dimensional totally asymmetric simple exclusion process (TASEP) with four types of particles, $\{1,0,\bar{1},*\}$, in contact with reservoirs. Particles of species $0$ can neither enter nor exit the lattice, and those of species $*$ are constrained to lie at the first and last site. Particles of species $1$ enter from the left reservoir into either the first or second site, move rightwards, and leave from either the last or penultimate site. Conversely, particles of species $\bar{1}$ enter from the right reservoir into either the last or penultimate site, move leftwards, and leave from either the first or last site. This dynamics is motivated by a natural random walk on the Weyl group of type D. We compute the exact nonequilibrium steady state distribution using a matrix ansatz building on earlier work of Arita. We then give explicit formulas for the nonequilibrium partition function as well as densities and currents of all species in the steady state, and derive the phase diagram.
description: 19 pages, 1 figure, final version
Ozone Anomalies in Dry Intrusions Associated with Atmospheric Rivers
Creators: name: Hall, Kirsten R.
name: Wang, Huiqun
name: Souri, Amir H.
name: Liu, Xiong
name: Chance, Kelly
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: As a result of their important role in weather and the global hydrological cycle, understanding atmospheric rivers' (ARs) connection to synoptic-scale climate patterns and atmospheric dynamics has become increasingly important. In addition to case studies of two extreme AR events, we produce a December climatology of the three-dimensional structure of water vapor and O3 (ozone) distributions associated with ARs in the northeastern Pacific from 2004-2014 using MERRA-2 reanalysis products. Results show that positive O3 anomalies reside in dry intrusions of stratospheric air due to stratosphere-to-troposphere transport (STT) behind the intense water vapor transport of the AR. In composites, we find increased excesses of O3 concentration, as well as in the total O3 flux within the dry intrusions, with increased AR strength. We find that STT O3 flux associated with ARs over the NE Pacific accounts for up to 13 percent of total Northern Hemisphere STT O3 flux in December, and extrapolation indicates that AR-associated dry intrusions may account for as much as 32 percent of total NH STT O3 flux. This study quantifies STT of O3 in connection with ARs for the first time and improves estimates of tropospheric ozone concentration due to STT in the identification of this correlation. In light of predictions that ARs will become more intense and/or frequent with climate change, quantifying AR-related STT O3 flux is especially valuable for future radiative forcing calculations.
description: 26 pages, 11 main text figures, 3 appendix figures; published in JGR: Atmospheres
R parity violating contribution to $e^+e^-(μ^+μ^-)\to t{\bar c}$
Creators: name: Mahanta, Uma
name: Ghosal, Ambar
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article we consider the contribution of $R_p$ violating couplings to the process $e^+e^-(μ^+μ^-)\to t{\bar c}$ at high energy lepton collider. We show that the present upper bound on the relevant $R_p$ violating coulpings obtained from low energy measurements would produce a few hundred to a thousand top-charm events at the next linear $e^+e^-(μ^+μ^-)$ collider. Hence, it should be possible to observe the rare process at future lepton collider.
description: LaTEX, 13 pages, one figure is removed. A brief discussion on possible backgrounds is added. To appear in Phys. Rev. D
Discrete Darboux Transformation for Ablowitz-Ladik Systems Derived from Numerical Discretization of Zakharov-Shabat Scattering Problem
Creators: name: Vaibhav, Vishal
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The numerical discretization of the Zakharov-Shabat Scattering problem using integrators based on the implicit Euler method, trapezoidal rule and the split-Magnus method yield discrete systems that qualify as Ablowitz-Ladik systems. These discrete systems are important on account of their layer-peeling property which facilitates the differential approach of inverse scattering. In this paper, we study the Darboux transformation at the discrete level by following a recipe that closely resembles the Darboux transformation in the continuous case. The viability of this transformation for the computation of multisoliton potentials is investigated and it is found that irrespective of the order of convergence of the underlying discrete framework, the numerical scheme thus obtained is of first order with respect to the step size.
174P/Echeclus and its Blue Coma Observed Post-outburst
Creators: name: Seccull, Tom
name: Fraser, Wesley C.
name: Puzia, Thomas H.
name: Fitzsimmons, Alan
name: Cupani, Guido
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: It has been suggested that centaurs may lose their red surfaces and become bluer due to the onset of cometary activity, but the way in which cometary outbursts affect the surface composition and albedo of active centaurs is poorly understood. We obtained consistent visual-near-infrared (VNIR) reflectance spectra of the sporadically active centaur 174P/Echeclus during a period of inactivity in 2014 and six weeks after its outburst in 2016 to see if activity had observably changed the surface properties of the nucleus. We observed no change in the surface reflectance properties of Echeclus following the outburst compared to before, indicating that, in this case, any surface changes due to cometary activity were not sufficiently large to be observable from Earth. Our spectra and post-outburst imaging have revealed, however, that the remaining dust coma is not only blue compared to Echeclus, but also bluer than solar, with a spectral gradient of -7.7+/-0.6% per 0.1 micron measured through the 0.61-0.88 micron wavelength range that appears to continue up to a wavelength of around 1.3 micron before becoming neutral. We conclude that the blue visual color of the dust is likely not a scattering effect, and instead may be indicative of the dust's carbon-rich composition. Deposition of such blue, carbon-rich, comatic dust onto a red active centaur may be a mechanism by which its surface color could be neutralized.
description: 15 pages, 4 figures, 3 tables, AJ accepted, in press
Hemiactinomycin, an undescribed intermediate of actinomycin biosynthesis from an actinomycetes strain Streptomyces antibioticus H41-55
Creators: name: Liu, Ting
name: Xu, Tianqi
name: Hu, Chen
name: Sun, Dayuan
name: Zhou, Guangxiong
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Virology

description: Hemiactinomycin (1), an intermediate derivative of actinomycin biosynthesis, together with three known actinomycins (2-4) , were isolated from the ethanolic extract of Streptomyces antibioticus H41-55 fermentation mycelium by using various column chromatography. The structure of the derivative was established by extensive spectroscopic analysis, including HRESIMS, 1D, and 2D NMR spectroscopy. In addition, the anti-inflammatory activities of all the isolates were tested. The derivative (1) showed inhibiting NO release activities in LPS-induced RAW 264.7 macrophages with the IC50 values of 15.41 ± 0.66 μM.
Exploiting $h \to W^*W^*$ Decays at the Upgraded Fermilab Tevatron
Creators: name: Han, Tao
name: Turcot, Andre S.
name: Zhang, Ren-Jie
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the observability of a Standard Model-like Higgs boson at an upgraded Fermilab Tevatron via the mode $h \to W^*W^*$. We concentrate on the main channel $gg \to h \to W^*W^* \to l νl ν$. We also find the mode $q\bar q'\to W h \to W W^*W^* \to l^\pm νl^\pm νjj$ useful. We perform detector level simulations by making use of a Monte Carlo program SHW. Optimized searching strategy and kinematical cuts are developed. We find that with a c.m. energy of 2 TeV and an integrated luminosity of 30 fb$^{-1}$ the signal should be observable at a 3$σ$ level or better for the mass range of 145 GeV < m_h < 180 GeV. For 95% confidence level exclusion, the mass reach is 135 GeV < m_h <190 GeV. We also present results of studying these channels with a model-independent parameterization. Further improvement is possible by including other channels. We conclude that the upgraded Fermilab Tevatron will have the potential to significantly advance our knowledge of Higgs boson physics.
description: 23 pages; 15 figures; 5 tables
A Generalization of Wirtinger Flow for Exact Interferometric Inversion
Creators: name: Yonel, Bariscan
name: Yazici, Birsen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Interferometric inversion involves recovery of a signal from cross-correlations of its linear transformations. A close relative of interferometric inversion is the generalized phase retrieval problem, which consists of recovering a signal from the auto-correlations of its linear transformations. Recently, significant advancements have been made in phase retrieval methods despite the ill-posed, and non-convex nature of the problem. One such method is Wirtinger Flow (WF), a non-convex optimization framework that provides high probability guarantees of exact recovery under certain measurement models, such as coded diffraction patterns, and Gaussian sampling vectors. In this paper, we develop a generalization of WF for interferometric inversion, which we refer to as Generalized Wirtinger Flow (GWF). GWF theory extends the probabilistic exact recovery results of WF to arbitrary measurement models characterized in the equivalent lifted problem, hence covers a larger class of measurement models. Our framework unifies the theory of low rank matrix recovery (LRMR) and the non-convex optimization approach of WF, thereby establishes theoretical advantages of the non-convex approach over LRMR. We identify a new sufficient condition on the lifted forward model that directly implies exact recovery conditions of standard WF. This condition is less stringent than those of LRMR, which is the state of the art approach for exact interferometric inversion. We establish our sufficient condition for the cross-correlations of linear measurements collected by complex Gaussian sampling vectors, and show that the exact recovery conditions of standard WF imply our sufficient condition. As a result, the regularity condition of WF becomes redundant in solving the interferometric inversion problem. Finally, we demonstrate the effectiveness of GWF numerically in a deterministic multi-static radar imaging scenario.
description: Submitted to SIAM Journal on Imaging Sciences
Measuring research data archives
Creators: name: Scharnhorst, Andrea
name: Tykhonov, Vyacheslav
name: Indarto, Eko
name: Doorn, Peter
Publisher: name: Zenodo
Year: 2023
Subjects: research data management
research data repositories and archives
indicators
research evaluation

description: Data and data practices attract growing attention by those who measure scientific research. But, such as in scientometrics in general, many investigations look at data and data practices through the lens of output: for instance, in the form of formal and informal data citations (Gregory 2021). In this paper, we report about experiments and investigations done in a research data archive over a couple of years to gain insides in practices in and around research data archives. We discuss various methodologies, findings and reflect about opportunities and challenges when it comes to ‘measure’ how the data life cycle and the research life cycle interact. We are interested to raise awareness to the topic and to relate to similar initiatives in the field of quantitative studies of science.
Une étude des représentations modulo $p$ de SL(2,F)
Creators: name: Abdellatif, Ramla
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Following what Barthel-Livné and Breuil made for GL(2,F), we study mod $p$ representations of SL(2,F) for F a complete non-archimedean local field of residual characteristic p and with finite residue field. In particular, we link these representations to the mod p representations of GL(2,F) and, when F = Q_p, we give an explicit description of the so-called supersingular representations, that do appear by packets of size at most 2.
description: 30 pages
Random bond XXZ chains with modulated couplings
Creators: name: Cabra, D. C.
name: De Martino, A.
name: Grynberg, M. D.
name: Peysson, S.
name: Pujol, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetization behavior of q-periodic antiferromagnetic spin 1/2 Heisenberg chains under uniform magnetic fields is investigated in a background of disorder exchange distributions. By means of both real space decimation procedures and numerical diagonalizations in XX chains, it is found that for binary disorder the magnetization exhibits wide plateaux at values of 1+2(p-1)/q, where p is the disorder strength. In contrast, no spin gaps are observed in the presence of continuous exchange distributions. We also study the magnetic susceptibility at low magnetic fields. For odd q-modulations the susceptibility exhibits a universal singularity, whereas for q even it displays a non-universal power law behavior depending on the parameters of the distribution.
description: 4 pages, 3 figures. Final version to appear in PRL
Structure interne des representations modulo p de SL(2,Q_{p})
Creators: name: Abdellatif, Ramla
name: Morra, Stefano
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F85, 22E50

description: Let p be an odd prime number. Using some previous work of the two authors, we determine the socle filtration of all irreducible smooth mod p representations of SL(2,Q_{p}).
description: 12 pages
Distribution of the Absorption by Chaotic States in Quantum Dots
Creators: name: Taniguchi, Nobuhiko
name: Prigodin, Vladimir N.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The mesoscopic fluctuations of the absorption at optical transitions from a low energy regular state to high energy chaotic states in an aggregate of semiconductor quantum dots is studied. We provide a universal dependence of the distribution of the absorption coefficient on the total number of dots and the ratio of the level broadening to the level spacing. The distribution remain broad even at large broadening, and the absorption spectrum should demonstrate a strong sensitivity to weak magnetic field in the region of large and weak absorption. The results can also apply to the absorption of Rydberg atoms in strong magnetic field at the pre-threshold ionization.
description: 4 pages, 2 eps figures, REVTeX3 + multicol.sty + epsf.tex