cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Coarsening dynamics of Ising-nematic order in a frustrated Heisenberg antiferromagnet
Creators: name: Yang, Yang
name: Liu, Yi-Hsuan
name: Fernandes, Rafael M.
name: Chern, Gia-Wei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the phase ordering dynamics of the classical antiferromagnetic $J_1$-$J_2$ (nearest-neighbor and next-nearest-neighbor couplings) Heisenberg model on the square lattice in the strong frustration regime ($J_2/J_1 > 1/2$). While thermal fluctuations preclude any long-range magnetic order at finite temperatures, the system exhibits a long-range spin-driven nematic phase at low temperatures. The transition into the nematic phase is further shown to belong to the two-dimensional Ising universality class based on the critical exponents near the phase transition. Our large-scale stochastic Landau-Lifshitz-Gilbert simulations find a two-stage phase ordering when the system is quenched from a high-temperature paramagnetic state into the nematic phase. In the early stage, collinear alignments of spins lead to a locally saturated Ising-nematic order. Once domains of well-defined Ising order are developed, the late-stage relaxation is dominated by curvature-driven domain coarsening, as described by the Allen-Cahn equation. The characteristic size of Ising-nematic domains scales as the square root of time, similar to the kinetic Ising model described by the time-dependent Ginzburg-Landau theory. Our results confirm that the late-stage ordering kinetics of the spin-driven nematic, which is a vestigial order of the frustrated Heisenberg model, belongs to the dynamical universality class of a non-conserved Ising order. Interestingly, the system shows no violation of the superuniversality hypothesis under weak bond disorder. The dynamic scaling invariance is preserved in the presence of weak bond disorder. We also discuss possible applications of our results to materials for which vestigial Ising-nematic order is realized.
description: 13 pages, 13 figures
Quantifying the x-ray dark-field signal in single-grid imaging
Creators: name: How, Ying Ying
name: Morgan, Kaye
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: X-ray dark-field imaging reveals the sample microstructure that is unresolved when using conventional methods of x-ray imaging. In this paper, we derive a new method to extract and quantify the x-ray dark-field signal collected using a single-grid imaging set-up, and relate the signal strength to the number of sample microstructures, $N$. This was achieved by modelling sample-induced changes to the shadow of the upstream grid, and fitting experimental data to this model. Our results suggested that the dark-field scattering angle from our spherical microstructures is proportional to $^{2.19}\sqrt{N}$, which deviated from the theoretical model of $\sqrt{N}$, but was not inconsistent with results from other experimental methods. We believe the approach outlined here can equip quantitative dark-field imaging of small samples, particularly in cases where only one sample exposure is possible, either due to sample movement or radiation dose limitations. Future directions include an extension into directional dark-field imaging.
description: 20 pages, 9 figures
Thermoelectric generator in endoreversible approximation: the effect of heat-transfer law under finite physical dimensions constraint
Creators: name: Kaur, Jasleen
name: Johal, Ramandeep S.
name: Feidt, Michel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We revisit the optimal performance of a thermoelectric generator within the endoreversible approximation, while imposing a finite physical dimensions constraint (FPDC) in the form of a fixed total area of the heat exchangers. Our analysis is based on the linear-irreversible law for heat transfer between the reservoir and the working medium, in contrast to Newton's law usually assumed in literature. The optimization of power output is performed with respect to the thermoelectric current as well as the fractional area of the heat exchangers. We describe two alternate designs for allocating optimal areas to the heat exchangers. Interestingly, for each design, the use of linear-irreversible law yields the efficiency at maximum power in the well-known form, $2η_{\rm C}^{}/ (4-η_{\rm C}^{})$, earlier obtained for the case of thermoelectric generator under exoreversible approximation, i.e. assuming only the internal irreversibility due to Joule heating. On the other hand, the use of Newton's law yields Curzon-Ahlborn efficiency.
description: 7 pages, 5 figures
Synthese de 1,3,2-dioxaphosphorinanes diastereoisomeres: Influence de la conformation des 1,3-diols de depart sur leurs structures et conformations
Creators: name: Dorra Kanzari-Mnallah
name: Med Lotfi Efrit
name: Azaiez Ben Akacha
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Inorganic Chemistry
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: 1,3-Diol reacts with phosphorus trichloride to produce diastereomeric 1,3,2-dioxaphosphorinanes. To find the predominant conformations, the influence of the diol precursors is studied and density functional theory calculation (DFT) is used. Then, hydrolysis of chlorophosphite leads to two cyclodialcoxyphosphites which are identified by NMR (31P, 1 H, 13C, MR-SM). Also, the steps of synthesis of hydrazone 1-(5,5-diethyl-2-oxo-1,3,2-dioxaphosphoranyl)-3-phenyl-propanone are studied by 31P NMR. Résumé La conformation de départ du 1,3-diol influe sur la conformation des dérivés de 1,3,2-dioxaphosphorinane. En effet, l'addition du 1,3-diol sur le trichlorure de phosphore fournit un chloro-phosphite sous forme d'un mélange de diastéréoisomères. L'hydrolyse des deux chloro-phosphites conduit à deux cyclodialcoxyphosphites qui sont identifiés par RMN (31P, 1H, 13C, GC-MS). Une étude de la synthèse de l'hydrazone β–phosphonatée est suivie par RMN du phosphore-31.
Supplementary document for Inverse design of deformed Sb2Se3 stripes in silicon waveguide for reconfigurable mode converters - 6566149.pdf
Creators: name: Luo, Xinyu
name: Ye, Han
name: Zhou, Mingxuan
name: Zhang, Shuhe
name: Sun, Yuxuan
name: Wang, Xueyu
name: Li, Jing
name: Chen, Lei
name: Liu, Yumin
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Figures
Gradient Descent Optimization of Fermion Nodes in Diffusion Monte Carlo
Creators: name: McFarland, John
name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a method for optimizing the location of the fermion ground-state nodes using a combination of diffusion Monte Carlo (DMC) and projected gradient descent (PGD). A PGD iteration shifts the parameters of an arbitrary node-fixing trial function in the opposite direction of the DMC energy gradient, while maintaining the cusp condition for atomic electrons. The energy gradient is calculated from DMC walker distributions by one of three methods we derive from an exact analytical expression. We combine our energy gradient calculation methods with different gradient descent algorithms and a projection operator that maintains the cusp condition. We apply this stochastic PGD method to trial functions of Be, Li$_2$, and Ne, all consisting of a single Slater determinant with randomized parameters, and find that the nodes dramatically improve to the same DMC energy as nodes optimized by variational Monte Carlo. Our method, therefore, departs from the standard procedure of optimizing the nodes with a non-DMC scheme such as variational Monte Carlo, Density function theory, or configuration interaction based calculation, which do not directly minimize the DMC energy.
description: 11 double spaced pages 6 figures
The formation of dimethyl amino(pyrene-1-yl)methylphosphonates in the Kabachnik-Fields reaction with dibenzyl phosphite, pyrene-1-carboxaldehyde and a non-aromatic amine in methanol
Creators: name: Jarosław Lewkowski
name: Moya, Maria Rodriguez
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: Plant Biology

description: The Kabachnik-Fields reaction of pyrene-1-carboxaldehyde with dibenzyl phosphite and aliphatic amines in methanol led to the formation of dimethyl amino(pyren-1-yl)methyl-phosphonates, in some cases accompanied by dimethyl hydroxy(pyren-1-yl)methyl-phosphonate. These results are exclusive for the above compounds, in all other studied cases (aromatic aldehydes, aromatic amines) the mixtures of several aminophosphonates were obtained.
A year with Visible Long-Covid Tracking
Creators: name: Athanasia Monika Mowinckel
Publisher: name: Zenodo
Year: 2025
Subjects: R
health-data
longcovid

description: Dr. Mowinckel's blog:  [I have previously](./blog/2025/the-difficult-year) written about having been sick with long covid for a year. It's not a picnic, and recovery is a slow and tedious process of extremely slowly trying to increase what I can manage to do within a single day.
Aromaticity of 1,4-dehydrotropylium ion and its mono- and poly-phospha analogues
Creators: name: Aishvaryadeep Kaur
name: Kour, Manjinder
name: Raakhi Gupta
name: Bansal, Raj K.
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: The tropylium ion and its mono- and poly-phospha analogues on removal of two hydrogen atoms from 1,4-positions accompanied by the formation of a σ C–C bond afford 1,4-dehydrotropylium ion and its mono- and poly-phospha analogues. Aromaticity of these compounds along with 3-aza-1,4-dehydrotropylium ion, 1,4-dehydrotropilidine and its 3-phospha-analogoue has been investigated at the DFT(B3LYP/6-31+G*) level using geometry, ASE, 1H NMR chemical shifts, NICS and magnetic susceptibility exaltation descriptors. 1,4-Dehydrotropylium ion and its mono- and poly-phospha analogues having up to four P atoms along with 3-aza-1,4-dehydrotropylium ion sustain aromaticity like their parent systems. However, 1,4-dehydrotropilidine and its 3-phospha-analogue are found to be nonaromatic.
Island, Page Curve and Superradiance of Rotating BTZ Black Holes
Creators: name: Yu, Ming-Hui
name: Lu, Cheng-Yuan
name: Ge, Xian-Hui
name: Sin, Sang-Jin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the Page curve and the information paradox for the BTZ black hole coupled to two thermal baths by applying the island paradigm. We prove that as the island locates outside the event horizon, the entanglement entropy of Hawking radiation for finite temperature black holes obeys the Page curve. However, for extremal rotating black holes, the Page time and the scrambling time become divergent. To avoid the ill-defined of the Page time, we consider the contribution of superradiance, which is a process that can extract rotational energy from black holes. The superradiance continues in a period much shorter than the Page time when the central charge $c$ is not too large. In this process, the Page time, the scrambling time and the black hole thermal entropy all decrease. Whenever the superradiance finishes, the black hole turn out to be a neutral black hole and the Hawking radiation dominates. The Page curve can then be well reproduced.
description: 22 pages, 4 figures, typos corrected, Refs added
A single-crystal alkali antimonide photocathode: high efficiency in the ultra-thin limit
Creators: name: Parzyck, C. T.
name: Galdi, A.
name: Nangoi, J. K.
name: DeBenedetti, W. J. I.
name: Balajka, J.
name: Faeth, B. D.
name: Paik, H.
name: Hu, C.
name: Arias, T. A.
name: Hines, M. A.
name: Schlom, D. G.
name: Shen, K. M.
name: Maxson, J. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The properties of photoemission electron sources determine the ultimate performance of a wide class of electron accelerators and photon detectors. To date, all high-efficiency visible-light photocathode materials are either polycrystalline or exhibit intrinsic surface disorder, both of which limit emitted electron beam brightness. In this letter we demonstrate the synthesis of epitaxial thin films of Cs$_3$Sb on 3C-SiC (001) using molecular-beam epitaxy. Films as thin as 4 nm have quantum efficiencies exceeding 2\% at 532 nm. We also find that epitaxial films have an order of magnitude larger quantum efficiency at 650 nm than comparable polycrystalline films on Si. Additionally, these films permit angle-resolved photoemission spectroscopy measurements of the electronic structure, which are found to be in good agreement with theory. Epitaxial films open the door to dramatic brightness enhancements via increased efficiency near threshold, reduced surface disorder, and the possibility of engineering new photoemission functionality at the level of single atomic layers.
description: Submitted Manuscript: 8 pages, 4 figures
Impact of reionization history on constraining primordial gravitational waves in future all-sky cosmic microwave background experiments
Creators: name: Jiang, Hanchun
name: Namikawa, Toshiya
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the impact of the reionization history on examining the shape of the power spectrum of the primordial gravitational waves (PGWs) with the cosmic microwave background (CMB) polarization. The large-scale CMB generated from the reionization epoch is important in probing the PGWs from all-sky experiments, such as LiteBIRD. The reionization model has been constrained by several astrophysical observations. However, its uncertainty could impact constraining models of the PGWs if we use large-scale CMB polarization. Here, by expanding the analysis of Mortonson & Hu (2007), we estimate how reionization uncertainty impacts constraints on a generic primordial tensor power spectrum. We assume that CMB polarization is measured by a LiteBIRD-like experiment and the tanh model is adopted for a theoretical template when we fit data. We show that constraints are almost unchanged even if the true reionization history is described by an exponential model, where all parameters are within 68% Confidence Level (CL). We also show an example of the reionization history that the constraints on the PGWs are biased more than 68% CL. Even in that case, using E-mode power spectrum on large scales would exclude such a scenario and make the PGW constraints robust against the reionization uncertainties.
description: 10 pages, 6 figures
Evolution of $Λ$ polarization in the hadronic phase of heavy-ion collisions
Creators: name: Sun, Yifeng
name: Zhang, Zhen
name: Ko, Che Ming
name: Zhao, Wenbin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the AMPT + MUSIC+UrQMD hybrid model, we study the global and local spin polarizations of $Λ$ hyperons as functions of the freeze-out temperature of the spin degree of freedom in the hadronic phase of Au+Au collisions at $\sqrt{s_{NN}}=19.6$ GeV. Including contributions from both the thermal vorticity and thermal shear of the hadronic matter, we find that, with the spin freeze-out temperature dropping from the hadronization temperature of 160 MeV to 110 MeV at the kinetic freeze-out, both the global and local spin polarizations of $Λ$ hyperons due to the thermal vorticity decrease by a factor of two, while those due to the thermal shear decrease quickly and become negligibly small at 140 MeV. Our results suggest the importance of understanding the dynamical evolution of the spin degree of freedom in the hadronic stage in relativistic heavy-ion collisions.
description: 5 pages, 3 figures, references updated
Foundations of Dynamical Modeling
Creators: name: Dushoff, Jonathan
Publisher: name: figshare
Year: 2017
Subjects: subject: 111706 Epidemiology
subject: FOS: Health sciences
subject: 10299 Applied Mathematics not elsewhere classified
subject: FOS: Mathematics

description: An introduction to the susceptible-infected-recovered compartmental model of infectious disease transmission.
A Hessian-Based Assessment of Atomic Forces for Training Machine Learning Interatomic Potentials
Creators: name: Herbold, Marius
name: Behler, Jörg
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In recent years, many types of machine learning potentials (MLPs) have been introduced, which are able to represent high-dimensional potential-energy surfaces (PES) with close to first-principles accuracy. Most current MLPs rely on atomic energy contributions given as a function of the local chemical environments. Frequently, in addition to total energies also atomic forces are used to construct the potentials, as they provide detailed local information about the PES. Since many systems are too large for electronic structure calculations, obtaining reliable reference forces from smaller subsystems like molecular fragments or clusters can substantially simplify the construction of the training sets. Here, we propose a method to determine structurally converged molecular fragments providing reliable atomic forces based on an analysis of the Hessian. The method, which serves as a locality test and allows to estimate the importance of long-range interactions, is illustrated for a series of molecular model systems and the metal-organic framework MOF-5 as an example for a complex organic-inorganic hybrid material.
description: 15 pages, 13 figures excluding the supporting information, submitted to JCP
Supplementary document for Multiscale label-free imaging of myelin in human brain tissue with polarization-sensitive optical coherence tomography and birefringence microscopy - 6555230.pdf
Creators: name: Blanke, Nathan
name: Chang, Shuaibin
name: Novoseltseva, Anna
name: Boas, David
name: Bigio, Irving
name: Wang, Hui
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Methods
Regional favouritism and education development
Creators: name: Wang, Cong
name: Lu, Yifan
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Regional studies have found significant agglomeration effects of education development on economic growth. Regional favouritism is potentially closely related to public investment in education, further impacting regional growth. This paper provides significant empirical evidence on the potential impact of favouritism on education development in the Chinese context. Using data for 282 Chinese cities from 1996 to 2016 with treatment for endogeneity (Lewbel two-stage least squares estimator), the results provide evidence that Chinese provincial political leaders favour their birthplaces’ education resource development, and that the effect is larger for within-provincial impact and higher tier cities ranked by income.
Towards First-principle Characterization of Cosmic-ray Transport Coefficients from Multi-scale Kinetic Simulations
Creators: name: Bai, Xue-Ning
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A major uncertainty in understanding the transport and feedback of cosmic-rays (CRs) within and beyond our Galaxy lies in the unknown CR scattering rates, which are primarily determined by wave-particle interaction at microscopic gyro-resonant scales. The source of the waves for the bulk CR population is believed to be self-driven by the CR streaming instability (CRSI), resulting from the streaming of CRs downward a CR pressure gradient. While a balance between driving by the CRSI and wave damping is expected to determine wave amplitudes and hence the CR scattering rates, the problem involves significant scale separation with substantial ambiguities based on quasi-linear theory (QLT). Here we propose a novel "streaming box" framework to study the CRSI with an imposed CR pressure gradient, enabling first-principle measurement of the CR scattering rates as a function of environmental parameters. By employing the magnetohydrodynamic-particle-in-cell (MHD-PIC) method with ion-neutral damping, we conduct a series of simulations with different resolutions and CR pressure gradients and precisely measure the resulting CR scattering rates in steady state. The measured rates show scalings consistent with QLT, but with a normalization smaller by a factor of several than typical estimates based on single-fluid treatment of CRs. A momentum-by-momentum treatment provides better estimates when integrated over momentum, but is also subject substantial deviations especially at small momentum. Our framework thus opens up the path towards providing comprehensive subgrid physics for macroscopic studies of CR transport and feedback in broad astrophysical contexts.
description: 26 pages, 8 figures, accepted for publication in ApJ
In-plane orbital magnetization as a probe for symmetry breaking in strained twisted bilayer graphene
Creators: name: Antebi, Ohad
name: Stern, Ady
name: Berg, Erez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Three symmetries prevent a twisted bilayer of graphene from developing an in-plane spontaneous magnetization in the absence of a magnetic field - time reversal symmetry, $C_2$ symmetry to $π$ rotation and $C_3$ symmetry to $2π/3$ rotation. In contrast, there are experimental and theoretical indications that, at certain electron densities, time reversal and $C_2$ symmetries are broken spontaneously, while the $C_3$ symmetry is often broken due to strain. We show that in-plane orbital magnetization is a very sensitive probe to the simultaneous breaking of these three symmetries, exhibiting surprisingly large values (of the order of one Bohr magneton per moiré unit cell) for valley polarized states at rather small values of heterostrain. We attribute these large values to the large magnitude of the characteristic magnetization of individual Bloch states, which we find to reflect the fast Dirac velocity of single layer graphene, rather than the slow velocity of the twisted bilayer. These large values are forced to mutually cancel in valley-symmetric states, but the cancellation does not occur in valley-polarized states. Our analysis is carried out both for non-interacting electrons and within a simplified Hartree-Fock framework.
description: 17 pages, 9 figures
Populations of ultraluminous X-ray sources in galaxies: origin and evolution
Creators: name: Kuranov, A. G.
name: Postnov, K. A.
name: Yungelson, L. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Employing hybrid population synthesis, a model of the population of ultraluminous X-ray sources (ULX) in the binary systems with a black hole (BH) accretors is computed. It is compared to the model of the population of ULX with magnetized neutron stars (NS) that can be observed as pulsating ULX (Kuranov et al. 2020). A model of formation of BH is considered, in which their mass is determined by the mass of stellar CO core immediately before the collapse, as well as "delayed" and "rapid" collapse models (Fryer et al. 2012). Possible transiency of ULX due to accretion disks instability is taken into account The parameters and evolution of ULX are computed for the galaxies with constant star formation rate (SFR) and for the ones formed by an instantaneous star formation burst. The maximum number of ULX with BH ($\sim 10$) is reached in the galaxies with stationary $ SFR=10$\msun/yr in $\sim 1$ Gyr after beginning of star formation. ULX which are observed after the end of star formation, are binaries, in which BH and/or NS formed before the completion of star formation, while long-living donors with the mass $\sim$\msun\ continue RLOF or even fill their Roche lobes later. In several Gyr after completion of star formation the number of ULX in the galaxies with mass $M_G=10^{10}$\,\msun\ becomes less than 1 per 10 galaxies, most of them are ULX with NS. In ULX with NS, regardless of the adopted SFR model, dominate persistent sources with the donor overflowing Roche lobe. The number of transient sources is by more than an order of magnitude lower. Wind-accreting ULX are by an order of magnitude more rare than the sources with accretion via RLOF.
description: 32 pages, 15 figures
Nuclear states projected from a pair condensate
Creators: name: Lu, Yi
name: Lei, Yang
name: Johnson, Calvin W.
name: Shen, Jia Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Atomic nuclei exhibit deformation, pairing correlations, and rotational symmetries. To meet these competing demands in a computationally tractable formalism, we revisit the use of general pair condensates with good particle number as a trial wave function for even-even nuclei. After minimizing the energy of the condensate, we project out states with good angular momentum with a fast projection technique, allowing for general triaxial deformations. To show applicability, we present example calculations from pair condensates in several model spaces, and compare against projected Hartree-Fock and full configuration-interaction shell model calculations. This approach successfully generates spherical, vibrational and rotational spectra, demonstrating potential for modeling medium- to heavy-mass nuclei.
description: 8 figures
Conversion of nitriles to 1-aminophosphonic acids and preparation of phosphahomocysteines of high enantiomeric excess
Creators: name: Renzhe Qian
name: Horak, Jeannie
name: Hammerschmidt, Friedrich
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: 60506 Virology

description: A variety of nitriles was reduced to diisobutylaluminum salts of aldimines, to which diisopropyl phosphite was added. The corresponding 1-aminophosphonates were either deprotected to give racemic 1-aminophosphonic acids or reacted with Boc2O to yield N-Boc-protected 1-aminophosphonates. The enantiomers of 2-benzylthio-1-(t-butoxycarbonylamino)propylphosphonate were obtained from the racemate by chiral HPLC and converted to phosphonic acid analogs of (R)- and (S)-homocysteine, (R)- and (S)-2-aminobutyric acid and (S)-methionine, all of ee >97% as determined by chiral HPLC.
Materials
Creators: name: Weissgerber, Sophia C.
name: Fahle, Johanna
name: Kiunke, Felix
name: Keweloh, Arno Ingraban
Publisher: name: OSF Registries
Year: 2019
Subjects: CREP
Epistemic Intuitions
Folk Epistemology
Justified True Belief
Knowledge
Multilab
Multilevel Modeling
Replication
Social Cognition

description: The component includes all materials used in the direct+ replication (ID AC 1805); see the wiki for further information.
Diethyl boronobenzylphosphonates as substrates in Suzuki–Miyaura reaction
Creators: name: Rydzewska, Agata
name: Mangold, Anna
name: Wanat, Weronika
name: Paweł Kafarski
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology

description: N-substituted boronobenzylphosphonates were evaluated as substrates in Suzuki–Miyaura coupling catalyzed by tetrakis(triphenylphosphine)palladium(0) and complex of palladium acetate and (2-biphenyl)dicyclohexylphosphine. It was proven that they may be considered as useful substrates for the preparation of functionalized aminophosphonates.
Kernel Methods for the Approximation of the Eigenfunctions of the Koopman Operator
Creators: name: Lee, Jonghyeon
name: Hamzi, Boumediene
name: Hou, Boya
name: Owhadi, Houman
name: Santin, Gabriele
name: Vaidya, Umesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: Numerical Analysis (math.NA)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The Koopman operator provides a linear framework to study nonlinear dynamical systems. Its spectra offer valuable insights into system dynamics, but the operator can exhibit both discrete and continuous spectra, complicating direct computations. In this paper, we introduce a kernel-based method to construct the principal eigenfunctions of the Koopman operator without explicitly computing the operator itself. These principal eigenfunctions are associated with the equilibrium dynamics, and their eigenvalues match those of the linearization of the nonlinear system at the equilibrium point. We exploit the structure of the principal eigenfunctions by decomposing them into linear and nonlinear components. The linear part corresponds to the left eigenvector of the system's linearization at the equilibrium, while the nonlinear part is obtained by solving a partial differential equation (PDE) using kernel methods. Our approach avoids common issues such as spectral pollution and spurious eigenvalues, which can arise in previous methods. We demonstrate the effectiveness of our algorithm through numerical examples.
Synthesis and X-ray single crystal structure analysis of a new 2-chlorobenzyl ammonium salt of phosphonic acid
Creators: name: Aghahosseini, Hamideh
name: Ramazani, Ali
name: Ślepokura, Katarzyna
name: Lis, Tadeusz
name: Joo, Sang Woo
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Plant Biology

description: An efficient synthesis of a new 2-chlorobenzyl ammonium salt of phosphonic acid from the reaction of diethyl phosphite with 2-chlorobenzyl amine is described at moderate temperature in catalyst- and solvent-free conditions. The structure of this phosphonic acid salt was confirmed by FT-IR, 1H, 13C, and 31P NMR spectroscopy, and single crystal X-ray structure analysis.
Giant widening of interface magnetic layer in almost compensated iron garnet
Creators: name: Kudasov, Y. B.
name: Logunov, M. V.
name: Kozabaranov, R. V.
name: Makarov, I. V.
name: Platonov, V. V.
name: Surdin, O. M.
name: Maslov, D. A.
name: Korshunov, A. S.
name: Strelkov, I. S.
name: Stognij, A. I.
name: Selemir, V. D.
name: Nikitov, S. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A two-sublattice ferrimagnet undergoes a transition from a collinear to canted magnetic phase at magnetic field oriented along an easy magnetization direction. In this work, we study the transition by means of the magneto-optical Faraday effect in a thin film of compensated iron garnet (Lu$_{3-{\rm{x}}}$Bi$_{\rm{x}}$)(Fe$_{5-{\rm{y}}-{\rm{z}}}$Ga$_{\rm{y}}$Al$_{\rm{z}}$)O$_{12}$ grown on Gd$_3$Ga$_5$O$_{12}$ substrate. In the immediate vicinity of the compensation temperature a precursor of the transition with a complex shape was observed. Using a special sample with variable thickness we demonstrate an interfacial origin of the precursor. Diffusion of gadolinium from the substrate into the film forms a thin intermixed layer with enhanced magnetization. It induces an extended inhomogeneous magnetic structure in the film. A two-step shape of the precursor appears due to an easy-plane anisotropy of the intermixed magnetic layer. We emphasize that an effective width of the inhomogeneous magnetization distribution in the film grows enormously while approaching the compensation temperature.
description: 10 pages, 5 figures
Additional file 1 of Predictive value of albumin for intravenous immunoglobulin resistance in a large cohort of Kawasaki disease patients
Creators: name: Zhang, Rui
name: Shuai, Shuping
name: Zhang, Hongxi
name: Cai, Jianghui
name: Cui, Na
name: Tang, Mi
name: Xing, Shasha
name: Gao, Yu
name: Liu, Xia
name: Yang, Xiao
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Supplementary Material, Appendix S1. Comparison of N%, L%, CRP, albumin and CRP/Alb between IVIG responders group and IVIG non-responders group. Appendix S2. Baseline characteristics of the complete KD patients. Appendix S3. Baseline characteristics of the incomplete KD patients. Appendix S4. Multivariable logistic regression analysis for predicting IVIG-resistance in complete KD patients
Bistability of the large-scale dynamics in quasi-two-dimensional turbulence
Creators: name: de Wit, Xander M.
name: van Kan, Adrian
name: Alexakis, Alexandros
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In many geophysical and astrophysical flows, suppression of fluctuations along one direction of the flow drives a quasi-2D upscale flux of kinetic energy, leading to the formation of strong vortex condensates at the largest scales. Recent studies have shown that the transition towards this condensate state is hysteretic, giving rise to a limited bistable range in which both the condensate state as well as the regular 3D state can exist at the same parameter values. In this work, we use direct numerical simulations of thin-layer flow to investigate whether this bistable range survives as the domain size and turbulence intensity are increased. By studying the time scales at which rare transitions occur from one state into the other, we find that the bistable range grows as the box size and/or Reynolds number Re are increased, showing that the bistability is neither a finite-size nor a finite-Re effect. We furthermore predict a crossover from a bimodal regime at low box size, low Re to a regime of pure hysteresis at high box size, high Re, in which any transition from one state to the other is prohibited at any finite time scale.
description: 10 pages, 4 figures
1-(N-Acylamino)alkylphosphonic acids—Deacylation in aqueous solutions
Creators: name: Cypryk, Marek
name: Drabowicz, Jozef
name: Bartlomiej Gostynski
name: Kudzin, Marcin H.
name: Kudzin, Zbigniew H.
name: Urbaniak, Pawel
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biophysics
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified

description: The 1-(N-acylamino)alkylphosphonic acids (AC)-AAP belong to the interesting and potentially of pharmacological importance group of 1-aminoalkylphosphonic acids derivatives. Since susceptibility of (AC)-AAP on hydrolytic deacylation can form important factor influencing their biological activity, we have undertaken deacylation investigations of these compounds in aqueous media. In this article, we present our results on deacylation of various types of 1-(N-acylamino)alkylphosphonic acids (AC)-AAP, including 1-(N-acetylamino)alkyl-phosphonic Ac-AAP, 1-(N-chloroacetylamino)alkylphosphonic acids Mca-AAP, 1-(N-trifluoroacetylamino)alkylphosphonic acids TFA-AAP, and 1-(N-benzoylamino)-alkylphosphonic Bz-AAP, derived from representative 1-aminoalkylphosphonic acids AAP (GlyP, AlaP, ValP, PglP, and PheP) in neutral and 2 M HCl solutions.
Reflectionless wave propagation on shallow water with variable bathymetry and current. II
Creators: name: Churilov, Semyon M.
name: Stepanyants, Yury A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We show that in the linear approximation there are three classes of reflectionless wave propagation on a surface of shallow water in the channel with spatially varying depth, width, and current speed. Two of these classes have been described in our previous paper (Churilov & Stepanyants, 2022), and the third one was discovered recently and is described here. The general analysis of the problem shows that within the approach used in both our papers, these three classes, apparently, exhaust all possible cases of exact solutions of the problem considered. We show that the reflectionless flow can be global at certain conditions, i.e. it can exist on the entire x-axis. There are also reflectionless flows which exist only on the limited intervals of the x-axis.
description: 12 pages, 5 figures
The accretion process in the DQ Tau binary system
Creators: name: Fiorellino, Eleonora
name: Park, Sunkyung
name: Kóspál, Ágnes
name: Ábrahám, Péter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Mass accretion from the circumstellar disk onto the protostar is a fundamental process during star formation. Measuring the mass accretion rate is particularly challenging for stars belonging to binary systems, because it is often difficult to discriminate which component is accreting. DQ~Tau is an almost equal-mass spectroscopic binary system where the components orbit each other every 15.8~days. The system is known to display pulsed accretion, i.e., the periodic modulation of the accretion by the components on eccentric orbit. We present multiepoch ESO/VLT X-Shooter observations of DQ~Tau, with the aim to determine which component of this system is the main accreting source. We use the absorption lines in the spectra to determine the radial velocity of the two components, and measure the continuum veiling as a function of wavelength and time. We fit the observed spectra with non-accreting templates to correct for the photospheric and chromospheric contribution. In the corrected spectra we study in details the profiles of the emission lines and calculate mass accretion rates for the system as a function of orbital phase. In accordance with previous findings, we detect elevated accretion close to periastron. We measure that the accretion rate varies between $10^{-8.5}$ and $10^{-7.3}$ Msun/yr. The emission line profiles suggest that both stars are actively accreting and the dominant accretor is not always the same component, varying in few orbits.
description: 22 pages, 19 figures
Mouth Larva: Frequently asked questions
Creators: name: Chaudhari, Sunanda
Publisher: name: Pharmacy Infoline
Year: 2023

description: A mouth larva refers to the larvae of certain fly species that infest the mouth, also known as oral myiasis. This is a rare condition in humans but can be serious if left untreated.

Mouth Larva: Frequently asked questions

Manisha Chaudhari, HOD, Kokan Gyanpeeth Rahul Dharkar College of Pharmacy and Research Institute, Karjat

Also available at: pharmacyinfoline.com/pharma-news/mouth-larva/
Additional file 1 of VCAM-1 complements CA-125 in detecting recurrent ovarian cancer
Creators: name: Song, Jin
name: Sokoll, Lori J.
name: Zhang, Zhen
name: Chan, Daniel W.
Publisher: name: figshare
Year: 2023
Subjects: Cell Biology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified
Cancer

description: Additional file 1: Figure S1. Calibration curves of the 8-plex immunoassay. A-H, calibration curves of B7-H3, IL-6, PLA2G7, Tie-1, GDF-15, IL-6 R alpha, SDC1, and VCAM-1 in the 8-plex immunoassay generated using the 5 parameter (5PL) logistic regression model. A.U., arbitrary units. Table S1. Analytical performance of the 8-plex immunoassay. Table S2. Statistics of individual biomarkers of the 8-plex assay in healthy controls, primary, and recurrent ovarian cancer patients.
Charge and Spin Supercurrents in Magnetic Josephson Junctions with Spin Filters and Domain Walls
Creators: name: Dahir, Samme M.
name: Volkov, Anatoly F.
name: Eremin, Ilya M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze theoretically the influence of domain walls (DWs) on the DC Josephson current in magnetic superconducting S$_{m}$/Fl/F/Fl/S$_{m}$ junctions. The Josephson junction consists of two "magnetic" superconductors S$_{m}$ (superconducting film covered by a thin ferromagnetic layer), spin filters Fl and a ferromagnetic layer F with or without DW (DWs). The spin filters Fl allow electrons to pass with one specific spin orientation, such that the Josephson coupling is governed by a fully polarized long-range triplet component. In the absence of DW(s), the Josephson and spin currents are nonzero when the right and left filters, Fl$_{r,l}$, pass electrons with equal spin orientation and differ only by a temperature-independent factor. They become zero when the \textbf{spins} of the triplet Cooper pairs passing through the Fl$_{r,l}$ have opposite directions. Furthermore, for the different chiralities of the injected triplet Cooper pairs the spontaneous currents arise in the junction yielding a diode effect. Once a DW is introduced, it reduces the critical Josephson current $I_{c}$ in the case of equal spin polarization and makes it finite in the case of opposite spin orientation. The critical current $I_{c}$ is maximal when the DW is in the center of the F film. A deviation of the DW from the center generates a force that pushes the DW to the center of the F film. In addition, we consider the case of an arbitrary number $N$ of DW's, with the case $N=2$ corresponding to a model system for a magnetic skyrmion.
description: 13 pages, 3 figures
Cesarean Section Rate in Siriraj Hospital According to the Robson Classification
Creators: name: Sirichet  Anekpornwattana
Publisher: name: PIMDEE Co., Ltd.
Year: 2020
Subjects: Robson Classification
cesarean section
deliver
Induction of labor

description: Thai Journal of Obstetrics and Gynaecology, 28, 1, 6-15
Inferring Astrophysical Parameters of Core-Collapse Supernovae from their Gravitational-Wave Emission
Creators: name: Powell, Jade
name: Müller, Bernhard
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Nearby core-collapse supernovae (CCSNe) are powerful multi-messenger sources for gravitational-wave, neutrino and electromagnetic telescopes as they emit gravitational waves in the ideal frequency band for ground based detectors. Once a CCSN gravitational-wave signal is detected, we will need to determine the parameters of the signal, and understand how those parameters relate to the source's explosion, progenitor and remnant properties. This is a challenge due to the stochastic nature of CCSN explosions, which is imprinted on their time series gravitational waveforms. In this paper, we perform Bayesian parameter estimation of CCSN signals using an asymmetric chirplet signal model to represent the dominant high-frequency mode observed in spectrograms of CCSN gravitational-wave signals. We use design sensitivity Advanced LIGO noise and CCSN waveforms from four different hydrodynamical supernova simulations with a range of different progenitor stars. We determine how well our model can reconstruct time-frequency images of the emission modes, and show how well we can determine parameters of the signal such as the frequency, amplitude, and duration. We show how the parameters of our signal model may allow us to place constraints on the proto-neutron star mass and radius, the turbulent kinetic energy onto the proto-neutron star, and the time of shock revival.
Colposcopy Waiting Time for First-diagnosed Abnormal Cervical Cytology Patients: Experiences at Hatyai Hospital
Creators: name: Porntip Tassananutriyakul
Publisher: name: PIMDEE Co., Ltd.
Year: 2020
Subjects: appointments
schedules
cervical intraepithelial neoplasia
colposcopy

description: Thai Journal of Obstetrics and Gynaecology, 28, 1, 16-23