cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Understanding the Broadband Emission Process of 3C 279 through Longterm Spectral Analysis
Creators: name: Thekkoth, Aminabi
name: Sahayanathan, S.
name: Shah, Zahir
name: Paliya, Vaidehi S.
name: Ravikumar, C. D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The long term broadband spectral study of Flat Spectrum Radio Quasars during different flux states has the potential to infer the emission mechanisms and the cause of spectral variations. To scrutinize this, we performed a detailed broadband spectral analysis of 3C 279 using simultaneous Swift-XRT/UVOT and Fermi-LAT observations spanning from August 2008 to June 2022. We also supplement this with the simultaneous NuSTAR observations of the source. The optical/UV, X-ray, and gamma-ray spectra were individually fitted by a power-law to study the long-term variation in the flux and the spectral indices. A combined spectral fit of simultaneous optical/UV and X-ray spectra was also performed to obtain the transition energy at which the spectral energy distribution is minimum. The correlation analysis suggests that the long-term spectral variations of the source are mainly associated with the variations in the low energy index and the break energy of the broken power-law electron distribution which is responsible for the broadband emission. The flux distribution of the source represents a log-normal variability while the gamma-ray flux distribution showed a clear double log-normal behavior. The spectral index distributions were again normal except for gamma-ray which showed a double-Gaussian behavior. This indicates that the log-normal variability of the source may be associated with the normal variations in the spectral index. The broadband spectral fit of the source using synchrotron and inverse Compton processes indicates different emission processes are active at optical/UV, X-ray, and gamma-ray energies.
description: Accepted in MNRAS on 6th October 2023
Electronic Supplemental Material for 'On the adoption of canonical quasicrystalline laminates to achieve pure negative refraction of elastic waves'
Creators: name: Chen, Zhijiang
name: Morini, Lorenzo
name: Gei, Massimiliano
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Mechanics
subject: 90506 Structural Engineering
subject: FOS: Civil engineering
subject: 20301 Acoustics and Acoustical Devices; Waves
subject: FOS: Physical sciences

description: Mathematical details of some results contained in the paper
Characterization of an immobilized enzyme reactor for on-line protein digestion
Creators: name: Jorgenson, James
name: Moore, Stephanie
name: Hess, Stephanie
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Despite the developments for faster liquid chromatographic and mass spectral detection techniques, the standard in-solution protein digestion for proteomic analyses has remained relatively unchanged. The typical in-solution trypsin protein digestion is usually the slowest part of the workflow, albeit one of the most important. The development of a highly efficient immobilized enzyme reactor (IMER) with rapid performance for on-line protein digestion would greatly decrease the analysis time involved in a proteomic workflow. Presented here is the development of a silica based IMER for on-line protein digestion, which produced rapid digestions in the presence of organic mobile phase for both model proteins and a complex sample consisting of the insoluble portion of a yeast cell lysate. Protein sequence coverage and identifications evaluated between the IMER and in-solution digestions were comparable. Overall, for a yeast cell lysate with only a 10 sec volumetric residence time on-column, the IMER identified 507 proteins while the in-solution digestion identified 490. There were no significant differences observed based on identified protein’s molecular weight or isoelectric point between the two digestion methods. Implementation of the IMER into the proteomic workflow provided similar protein identification results, automation for sample analysis, and reduced the analysis time by 15 hr.
Renormalization group in the infinite-dimensional turbulence: third-order results
Creators: name: Adzhemyan, L. Ts.
name: Antonov, N. V.
name: Gol'din, P. B.
name: Kim, T. L.
name: Kompaniets, M. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The field theoretic renormalization group is applied to the stochastic Navier-Stokes equation with the stirring force correlator of the form k^(4-d-2ε) in the d-dimensional space, in connection with the problem of construction of the 1/d expansion for the fully developed fluid turbulence beyond the scope of the standard epsilon expansion. It is shown that in the large-d limit the number of the Feynman diagrams for the Green function (linear response function) decreases drastically, and the technique of their analytical calculation is developed. The main ingredients of the renormalization group approach -- the renormalization constant, beta function and the ultraviolet correction exponent omega, are calculated to order epsilon^3 (three-loop approximation). The two-point velocity-velocity correlation function, the Kolmogorov constant C_K in the spectrum of turbulent energy and the inertial-range skewness factor S are calculated in the large-d limit to third order of the epsilon expansion. Surprisingly enough, our results for C_K are in a reasonable agreement with the existing experimental estimates.
description: 30 pages with EPS figures
SUSTAINABLE DESIGN OF A HIGH-RISE RESIDENTIAL COMPLEX IN SHIRAZ WITH AN APPROACH ENHANCING CULTURAL INTERACTIONS
Creators: name: SIAMAKPOUR, Mohsen
Publisher: name: TUENGR Group
Year: 2018
Subjects: Architectural design
High-rise housing
Sustainable Architecture
Public spaces
Social Interaction

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 371-384
Path Integral Representation of Lorentzian Spinfoam Model, Asymptotics, and Simplicial Geometries
Creators: name: Han, Muxin
name: Krajewski, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A new path integral representation of Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam model is derived by employing the theory of unitary representation of SL(2,$\mathbb{C}$). The path integral representation is taken as a starting point of semiclassical analysis. The relation between the spinfoam model and classical simplicial geometry is studied via the large spin asymptotic expansion of the spinfoam amplitude with all spins uniformaly large. More precisely in the large spin regime, there is an equivalence between the spinfoam critical configuration (with certain nondegeneracy assumption) and a classical Lorentzian simplicial geometry. Such an equivalence relation allows us to classify the spinfoam critical configurations by their geometrical interpretations, via two types of solution-generating maps. The equivalence between spinfoam critical configuration and simplical geometry also allows us to define the notion of globally oriented and time-oriented spinfoam critical configuration. It is shown that only at the globally oriented and time-oriented spinfoam critical configuration, the leading order contribution of spinfoam large spin asymptotics gives precisely an exponential of Lorentzian Regge action of General Relativity. At all other (unphysical) critical configurations, spinfoam large spin asymptotics modifies the Regge action at the leading order approximation.
description: 35 pages, no figure
CONSTRUCTION OF A MODEL FOR INTERNAL AUDIT VIA ECONOMIC AND MATHEMATICAL METHODS
Creators: name: Harisova, Firdaus I.
Publisher: name: TUENGR Group
Year: 2018
Subjects: Internal control system
Estimated values
Financial loss function
Linear regression.

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 385-392
ALMA and Herschel reveal that X-ray selected AGN and main-sequence galaxies have different star formation rate distributions
Creators: name: Mullaney, J. R.
name: Alexander, D. M.
name: Aird, J.
name: Bernhard, E.
name: Daddi, E.
name: Del Moro, A.
name: Dickinson, M.
name: Elbaz, D.
name: Harrison, C. M.
name: Juneau, S.
name: Liu, D.
name: Pannella, M.
name: Rosario, D.
name: Santini, P.
name: Sargent, M.
name: Schreiber, C.
name: Simpson, J.
name: Stanley, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using deep Herschel and ALMA observations, we investigate the star formation rate (SFR) distributions of X-ray selected AGN host galaxies at 0.5
description: 5 pages, 3 figures, 1 table; Accepted for publication in MNRAS Letters after moderate changes
title: Personalization Using a blended learning model in face-to-face primary classrooms
Creators: name: Farrell, Danica B.
Publisher: name: Electronic version published by Vancouver Island University
Year: 2018
Subjects: subject: Blended learning

description: My Critical Challenge Question presents the opportunity: “How can a blended learning model be applied to facilitate personalization of writing instruction for primary students?” I have endeavored to seek contextual research and practical applications of technology and have worked towards compiling this information and sharing it with other teachers so that they have a place to start their own technology journey. Specifically, I have researched how blending a Writing program will help teachers support all of the learners in a primary classroom. This project was a joint endeavor with colleagues Carla Takach and Gina Farrell. We have each taken an aspect of learning and have created a place for teachers to find information in order to start their own journey. Our project is split into three distinct learning areas—Numeracy, Reading and Writing. I have focused on Writing and have researched practical technology applications to support Writing in a primary classroom. According to the BC Education Plan (2015), “Educators will need greater access and supports to use technology that enriches the learning process, and to connect with each other, parents, and communities” (pg.8). I see this project as a tool for educators, and a place where educators can seek, share and synthesize some understandings around implementing technology in their own classrooms. The main challenge that I am endeavouring to support is personalization in education. Students are individuals and have differing needs from each other. In a face-to-face classroom, where you often have one teacher and 24 students, how can we best use the tools that we have in order to stretch and teach each one of our students?
Non-metric fluid dynamics and cosmology on Finsler spacetimes
Creators: name: Hohmann, Manuel
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We generalize the kinetic theory of fluids, in which the description of fluids is based on the geodesic motion of particles, to spacetimes modeled by Finsler geometry. Our results show that Finsler spacetimes are a suitable background for fluid dynamics and that the equation of motion for a collisionless fluid is given by the Liouville equation, as it is also the case for a metric background geometry. We finally apply this model to collisionless dust and a general fluid with cosmological symmetry and derive the corresponding equations of motion. It turns out that the equation of motion for a dust fluid is a simple generalization of the well-known Euler equations.
description: 10 pages, no figures; to appear in the conference proceedings of the 9th Alexander Friedmann International Seminar, International Journal of Modern Physics: Conference Series, World Scientific Publishing Company
Unconventional mechanism of virtual-state population through dissipation
Creators: name: Vivas-Viaña, Alejandro
name: González-Tudela, Alejandro
name: Muñoz, Carlos Sánchez
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Virtual states are a central concept in quantum mechanics. By definition, the probability of finding a quantum system in a virtual state should be vanishingly small at all times. In contrast to this notion, we report a phenomenon occurring in open quantum systems by which virtual states can acquire a sizable population in the long time limit, even if they are not directly coupled to any dissipative channel. This means that the situation where the virtual state remains unpopulated can be metastable. We describe this effect by introducing a two-step adiabiatic elimination method, that we termed hierarchical adiabatic elimination, which allows one to obtain analytical expressions of the timescale of metastability in general open quantum systems. We show how these results can be relevant for practical questions such as the generation of stable and metastable entangled states in dissipative systems of interacting qubits.
Implementation of high slurry concentration and sonication to pack high-efficiency, meter-long capillary ultrahigh pressure liquid chromatography columns
Creators: name: Tallarek, Ulrich
name: Reising, Arved E.
name: Jorgenson, James W.
name: Godinho, Justin M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Slurry packing capillary columns for ultrahigh pressure liquid chromatography is complicated by many interdependent experimental variables. Previous results have suggested that combination of high slurry concentration and sonication during packing would create homogeneous bed microstructures and yield highly efficient capillary columns. Herein, the effect of sonication while packing very high slurry concentrations is presented. A series of six, 1 m × 75 μm internal diameter columns were packed with 200 mg/mL slurries of 2.02 μm bridged-ethyl hybrid silica particles. Three of the columns underwent sonication during packing and yielded highly efficient separations with reduced plate heights as low as 1.05.
A COMPARATIVE STUDY OF FOREIGN DIRECT INVESTMENT IN NIGERIAN CONSTRUCTION SECTOR DURING MILITARY REGIME AND DEMOCRATIC GOVERNMENT FROM 1984 TO 2017
Creators: name: Ebekozien, Andrew
Publisher: name: TUENGR Group
Year: 2018
Subjects: Construction Investment
Dictatorship Democracy
Nigerian Construction
Regimes Comparison
Infrastructure development
Regression
FDI.

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 425-437
TRAFFIC MANAGEMENT AT T INTERSECTIONS WITH ALWAYS-THRU TRAFFIC
Creators: name: Witchayet Pananun
name: Boonsap Witchayangkoon
name: Winai Raksuntorn
Publisher: name: TUENGR Group
Year: 2018
Subjects: Traffic Management Style
T-junction
Traffic delay
Traffic lane change rate
Channelizing island length

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 447-454
Towards excluding a light $Z^\prime$ explanation of $b\to s\ell^+\ell^-$
Creators: name: Crivellin, Andreas
name: Manzari, Claudio Andrea
name: Altmannshofer, Wolfgang
name: Inguglia, Gianluca
name: Feichtinger, Paul
name: Camalich, Jorge Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The discrepancies between $b\to s\ell^+\ell^-$ data and the corresponding Standard Model predictions constitute the most significant hints for new physics (at the TeV scale or below) currently available. In fact, many scenarios that can account for these anomalies have been proposed in the literature. However, only a single light new physics explanation, i.e. with a mass below the $B$ meson scale, is possible: a light $Z^\prime$ boson. In this article, we point out that improved limits on $B\to K^{(*)}νν$, including the experimental sensitivities required for a proper treatment of the necessarily sizable $Z^\prime$ width, together with the forthcoming Belle~II analyses of $e^+e^-\toμ^+μ^-+{\rm invisible}$, can rule out a $Z^\prime$ explanation of $b\to s\ell^+\ell^-$ data with a mass below $\approx4\,$GeV. Importantly, such a light $Z^\prime$ is the only viable single particle solution to the $b\to s\ell^+\ell^-$ anomalies predicting $R(K^{(*)})>0$ in high $q^2$ bins, therefore providing an essential consistency test of data.
description: 8 pages, 4 figures
The Soliton-Ricci Flow with variable volume forms
Creators: name: Pali, Nefton
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We introduce a flow of Riemannian metrics and positive volume forms over compact oriented manifolds whose formal limit is a shrinking Ricci soliton. The case of a fixed volume form has been considered in our previous work. We still call this new flow the Soliton-Ricci flow. It corresponds to a forward Ricci type flow up to a gauge transformation generated by the gradient of the density of the volumes. The new Soliton-Ricci flow exist for all times and represents the gradient flow of Perelman's $\mathcal{W}$ functional with respect to a pseudo-Riemannian structure over the space of metrics and normalized positive volume forms. We obtain an expression of the Hessian of the $\mathcal{W}$ functional with respect to such structure. Our expression shows the elliptic nature of this operator in directions orthogonal to the orbits obtained by the action of the group of diffeomorphism. In the case the initial data is Kähler then the Soliton-Ricci flow preserves the Kähler condition and the symplectic form. The space of tamed complex structures embeds naturally to the space of metrics and normalized positive volume forms via the Chern-Ricci map. Over such space the pseudo-Riemannian structure restricts to a Riemannian one. We perform a study of the sign of the restriction of the Hessian of the $\mathcal{W}$ functional over such space. This allows us to obtain a finite dimensional reduction, and thus the solution, of the well known problem of the stability of Kähler-Ricci solitons.
description: 134 pages, no figures
Performance comparison of three trypsin columns used in liquid chromatography
Creators: name: Gilar, Martin
name: Jorgenson, James W.
name: Tesařová, Eva
name: Moore, Stephanie M.
name: Kalíková, Květa
name: Šlechtová, Tereza
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Trypsin is the most widely used enzyme in proteomic research due to its high specificity. Although the in-solution digestion is predominantly used, it has several drawbacks, such as long digestion times, autolysis, and intolerance to high temperatures or organic solvents. To overcome these shortcomings trypsin was covalently immobilized on solid support and tested for its proteolytic activity. Trypsin was immobilized on bridge-ethyl hybrid silica sorbent with 300 Å pores, packed in 2.1 × 30 mm column and compared with Perfinity and Poroszyme trypsin columns. Catalytic efficiency of enzymatic reactors was tested using Nα-Benzoyl-L-arginine 4-nitroanilide hydrochloride as a substrate. The impact of buffer pH, mobile phase flow rate, and temperature on enzymatic activity was investigated. Digestion speed generally increased with the temperature from 20 to 37 °C. Digestion speed also increased with pH from 7.0 to 9.0; the activity of prototype enzyme reactor was highest at pH 9.0, when it activity exceeded both commercial reactors. Preliminary data for fast protein digestion are presented.
APPROACH TO RISK AND INVESTMENT ATTRACTIVENESS ESTIMATION FOR REGIONAL ECONOMIC ACTIVITY OF RUSSIA
Creators: name: Safiullin, Azat R.
Publisher: name: TUENGR Group
Year: 2018
Subjects: Investment competitiveness
Investment risk
Processing industries
Localization coefficients
Types of economic activity.

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 455-467
THE REVIVAL AT THE WORLD FESTIVAL OF YOUTH AND STUDENTS (19972017)
Creators: name: Bodrov, Oleg V.
name: Zakirov, Almaz V.
Publisher: name: TUENGR Group
Year: 2018
Subjects: Politics challenge
International relations International life
the World Festival of Youth and Students (WFYS)
the World Federation of Democratic Youth (WFDY)
World youth festivals
Youth forums
Anti-capitalist movements.

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 9, 5, 469-475
Pucotenlimab: First Approval
Creators: name: adisjournals, figshare admin
Publisher: name: Adis Journals
Year: 2022
Subjects: Medicine

description: Declarations Funding The preparation of this review was not supported by any external funding. Authorship and Conflict of interest During the peer review process the manufacturer of the agent under review was offered an opportunity to comment on the article. Changes resulting from any comments received were made by the authors on the basis of scientific completeness and accuracy. Sohita Dhillon is a contracted employee of Adis International Ltd/Springer Nature and declares no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content. Ethics approval, Consent to participate, Consent to publish, Availability of data and material, Code availability Not applicable. Additional information about this Adis Drug Review can be found here. Abstract Pucotenlimab (Puyouheng™) is a humanised immunoglobulin (Ig) G4 monoclonal antibody (mAb) being developed by Lepu Biopharma for the treatment of solid tumours, including gastrointestinal cancer, metastatic melanoma, liver cancer, bladder cancer, non-small cell lung cancer and breast cancer. Pucotenlimab binds to PD-1 and blocks its interaction with its ligands, PD-L1 and PD-L2, thereby restoring the ability of immune cells to target cancer cells. In July 2022, pucotenlimab received conditional first approval in China for the treatment of patients with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) solid tumours, including patients with advanced colorectal cancer who have experienced disease progression after previous therapy with fluorouracil, oxaliplatin and irinotecan, as well as patients with other advanced solid tumours who have experienced disease progression after previous first-line therapy and have no satisfactory treatment alternatives. In September 2022, pucotenlimab was approved in China for the treatment of unresectable or metastatic melanomas after the failure of previous systemic therapy. This article summarizes the milestones in the development of pucotenlimab leading to the first approval for the treatment of MSI-H/dMMR advanced solid tumours. © Springer Nature Switzerland AG 2022
Silene badaroi Breistr., Bull. Soc. Bot.
Creators: name: Peruzzi, Lorenzo
name: Galasso, Gabriele
name: Domina, Gianniantonio
name: Bartolucci, Fabrizio
name: Santangelo, Annalisa
name: Alessandrini, Alessandro
name: Astuti, Giovanni
name: D'Antraccoli, Marco
name: Roma-Marzio, Francesco
name: Ardenghi, Nicola M. G.
name: Barberis, Giuseppina
name: Conti, Fabio
name: Bernardo, Liliana
name: Peccenini, Simonetta
name: Stinca, Adriano
name: Wagensommer, Robert P.
name: Bonari, Gianmaria
name: Iamonico, Duilio
name: Iberite, Mauro
name: Viciani, Daniele
name: Guacchio, Emanuele Del
name: Galdo, Gianpietro Giusso Del
name: Lastrucci, Lorenzo
name: Villani, Mariacristina
name: Brunu, Antonello
name: Magrini, Sara
name: Pistarino, Annalaura
name: Brullo, Salvatore
name: Salmeri, Cristina
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Caryophyllaceae
Silene
Silene badaroi

description: Silene badaroi Breistr., Bull. Soc. Bot. France 110(suppl. 2): 130. 1966. [1963 publ. 13 May 1966]
 Ind. Loc.:—[“in rupib. promontorii di Noli” Badarò, Giorn. Fis. Chim. Storia Nat. Med. Arti s. 2, 9(1): 78. 1826.]. LIG
 Type:—Not designated.
 Note:— Published as intended replacement name for Silene salzmannii sensu Badarò, non Otth, actually this name is a new species published by reference to Badarò’s (Giorn. Fis. Chim. Storia Nat. Med. Arti s. 2, 9(1): 78. 1826. [January–February 1826]) previously and effectively published diagnosis (Art. 38.1(a) of the ICN). According to Art. 7.8 of the ICN, this name is to be typified by an element selected from the entire context of Badarò’s diagnosis.
 Compiled by:— G. Barberis
description: Published as part of Peruzzi, Lorenzo, Galasso, Gabriele, Domina, Gianniantonio, Bartolucci, Fabrizio, Santangelo, Annalisa, Alessandrini, Alessandro, Astuti, Giovanni, D'Antraccoli, Marco, Roma-Marzio, Francesco, Ardenghi, Nicola M. G., Barberis, Giuseppina, Conti, Fabio, Bernardo, Liliana, Peccenini, Simonetta, Stinca, Adriano, Wagensommer, Robert P., Bonari, Gianmaria, Iamonico, Duilio, Iberite, Mauro, Viciani, Daniele, Guacchio, Emanuele Del, Galdo, Gianpietro Giusso Del, Lastrucci, Lorenzo, Villani, Mariacristina, Brunu, Antonello, Magrini, Sara, Pistarino, Annalaura, Brullo, Salvatore & Salmeri, Cristina, 2019, An inventory of the names of native, non-endemic vascular plants described from Italy, their loci classici and types, pp. 1-215 in Phytotaxa 410 (1) on pages 156-157, DOI: 10.11646/phytotaxa.410.1.1, http://zenodo.org/record/13716045
Comparing the Diagnostic Accuracy of Five Instruments for Detecting Posttraumatic Stress Disorder in Youth
Creators: name: Youngstrom, Eric A.
name: You, Dokyoung S.
name: Findling, Robert L.
name: Youngstrom, Jennifer Kogos
name: Feeny, Norah C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: To compare diagnostic accuracy of five posttraumatic stress disorder (PTSD) measures in a large outpatient sample of youths aged 11 to 18 years.
Magnetostatic interaction in oriented assembly of elongated nanoparticles
Creators: name: Usov, N. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The elements of the magneto-dipole (MD) interaction matrix are calculated for a pair of oriented spheroidal magnetic nanoparticles with a semiaxes ratio a/b = 1.25, 1.5, 2.0 and 3.0 as a function of the distance between the particle centers. It is shown that the spherical approximation for MD interaction matrix is incorrect already at aspect ratios a/b > 1.25, if the distance R between the particle centers is of the order of particle sizes. However, for moderate particle aspect ratios, a/b < 1.5, the first order correction to spherical approximation with respect to a corresponding small parameter is shown to be in a good agreement with numerical data. Using exact MD interaction matrix, the quasi-static hysteresis loops of dilute assemblies of oriented clusters of spheroidal nanoparticles with different filling densities are calculated, depending on the direction of the external magnetic field with respect to the particle orientation axis.
description: 30 pages, 6 figures
Exact Fourier inversion formula over manifolds
Creators: name: Pali, Nefton
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We show an exact (i.e. no smooth error terms) Fourier inversion type formula for differential operators over Riemannian manifolds. This provides a coordinate free approach for the theory of pseudo-differential operators.
description: No figures
Vortex shedding frequency of a moving obstacle in a Bose-Einstein condensate
Creators: name: Lim, Younghoon
name: Lee, Yangheon
name: Goo, Junhong
name: Bae, Dalmin
name: Shin, Yong-il
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We experimentally investigate the periodic vortex shedding dynamics in a highly oblate Bose-Einstein condensate using a moving penetrable Gaussian obstacle. The shedding frequency $f_v$ is measured as a function of the obstacle velocity $v$ and characterized by a linear relationship of $f_v=a(v-v_c)$ with $v_c$ being the critical velocity. The proportionality constant $a$ is linearly decreased with a decrease in the obstacle strength, whereas $v_c$ approaches the speed of sound. When the obstacle size increases, both $a$ and $v_c$ are decreased. The critical vortex shedding is further investigated for an oscillating obstacle and found to be consistent with the measured $f_v$. When the obstacle's maximum velocity exceeds $v_c$ but its oscillation amplitude is not large enough to create a vortex dipole, we observe that vortices are generated in the low-density boundary region of the trapped condensate, which is attributed to the phonon emission from the oscillating obstacle. Finally, we discuss a possible asymptotic association of $a$ with the Strouhal number in the context of universal shedding dynamics of a superfluid.
description: 9 pages, 6 figures
On the dynamics of the Meissner effect
Creators: name: Hirsch, J. E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The question of how a metal becoming superconducting expels a magnetic field is addressed. It is argued that the conventional theory of superconductivity has not answered this question despite its obvious importance. We argue that the growth of the superconducting into the normal region and associated expulsion of magnetic field from the superconducting region can only be understood if it is accompanied by motion of charge from the superconducting into the normal region. From a microscopic point of view it is shown that the perfect diamagnetism of superconductors requires that superconducting electrons reside in orbits of spatial extent $2λ_L$, with $λ_L$ the London penetration depth. Associated with this physics, the spin-orbit interaction of the electron magnetic moment and the positively charged ionic background gives rise to a "Spin Meissner" effect, the generation of a macroscopic spin current near the surface of superconductors. We point out that both the Meissner and the Spin Meissner effect can be understood dynamically under the assumption that the superfluid condensate wavefunction $Ψ(\vec{r})$ does not screen itself, just like the $Ψ(\vec{r})$ for an electron in a hydrogen atom. We argue that the conventional theory of superconductivity cannot explain the Meissner effect because it does not contain the physical elements discussed here.
Suppression of ferromagnetism and influence of disorder in silicon-substituted CeRh6Ge4
Creators: name: Zhang, Y. J.
name: Nie, Z. Y.
name: Li, R.
name: Li, Y. C.
name: Yang, D. L.
name: Shen, B.
name: Ye, C.
name: Su, H.
name: Shi, R.
name: Wang, S. Y.
name: Steglich, F.
name: Smidman, M.
name: Yuan, H. Q.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a study of isoelectronic chemical substitution in the recently discovered quantum critical ferromagnet CeRh$_6$Ge$_4$. Upon silicon-doping, the ferromagnetic ordering temperature of CeRh$_6$(Ge$_{1-x}$Si$_x$)$_4$ is continuously suppressed, and no transition is observed beyond $x_c$$\approx$0.125. Non-Fermi liquid behavior with $C/T \propto$log($T^*/T$) is observed close to $x_c$, indicating the existence of strong quantum fluctuations, while the $T$-linear behavior observed upon pressurizing the parent compound is absent in the resistivity, which appears to be a consequence of the disorder induced by silicon doping. Our findings provide evidence for the role played by disorder on the unusual ferromagnetic quantum criticality in CeRh$_6$Ge$_4$, and provides further evidence for understanding the origin of this behavior.
Efficient and robust monolithic finite element multilevel Krylov subspace solvers for the solution of stationary incompressible Navier-Stokes equations
Creators: name: Ul Jabbar, Absaar
Publisher: name: Technische Universität Dortmund
Year: 2018
Subjects: subject: Monolithic multilevel methods
subject: Krylov subspaces
subject: GMRES
subject: FEM
subject: Navier-Stokes equations
subject: Saddle point problems
subject: 510
subject: Multi-level-Verfahren
subject: Krylov-Verfahren
subject: Finite-Elemente-Methode
subject: Navier-Stokes-Gleichung

description: Multigrid methods belong to the best-known methods for solving linear systems arising from the discretization of elliptic partial differential equations. The main attraction of multigrid methods is that they have an asymptotically meshindependent convergence behavior. Multigrid with Vanka (or local multilevel pressure Schur complement method) as smoother have been frequently used for the construction of very effcient coupled monolithic solvers for the solution of the stationary incompressible Navier-Stokes equations in 2D and 3D. However, due to its innate Gauß-Seidel/Jacobi character, Vanka has a strong influence of the underlying mesh, and therefore, coupled multigrid solvers with Vanka smoothing very frequently face convergence issues on meshes with high aspect ratios. Moreover, even on very nice regular grids, these solvers may fail when the anisotropies are introduced from the differential operator. In this thesis, we develop a new class of robust and efficient monolithic finite element multilevel Krylov subspace methods (MLKM) for the solution of the stationary incompressible Navier-Stokes equations as an alternative to the coupled multigrid-based solvers. Different from multigrid, the MLKM utilizes a Krylov method as the basis in the error reduction process. The solver is based on the multilevel projection-based method of Erlangga and Nabben, which accelerates the convergence of the Krylov subspace methods by shifting the small eigenvalues of the system matrix, responsible for the slow convergence of the Krylov iteration, to the largest eigenvalue. Before embarking on the Navier-Stokes equations, we first test our implementation of the MLKM solver by solving scalar model problems, namely the convection-diffusion problem and the anisotropic diffusion problem. We validate the method by solving several standard benchmark problems. Next, we present the numerical results for the solution of the incompressible Navier-Stokes equations in two dimensions. The results show that the MLKM solvers produce asymptotically mesh-size independent, as well as Reynolds number independent convergence rates, for a moderate range of Reynolds numbers. Moreover, numerical simulations also show that the coupled MLKM solvers can handle (both mesh and operator based) anisotropies better than the coupled multigrid solvers.
Baseline AMH Level Associated With Ovulation Following Ovulation Induction in Women With Polycystic Ovary Syndrome
Creators: name: Huang, Hao
name: Zhang, Heping
name: Eisenberg, Esther
name: Coutifaris, Christos
name: Cedars, Marcelle I.
name: Alvero, Ruben
name: Steiner, Anne Z.
name: Christman, Gregory M.
name: Legro, Richard S.
name: Mumford, Sunni L.
name: Casson, Peter R.
name: Diamond, Michael P.
name: Santoro, Nanette
name: Schlaff, William D.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Anti-Müllerian hormone (AMH) reduces aromatase activity and sensitivity of follicles to FSH stimulation. Therefore, elevated serum AMH may indicate a higher threshold for response to ovulation induction in women with polycystic ovary syndrome (PCOS). This study sought to determine the association between AMH levels and ovulatory response to treatment among the women enrolled into the Pregnancy in PCOS II (PPCOS II) trial. This was a secondary analysis of data from a randomized clinical trial in academic health centers throughout the United States Participants: A total of 748 women age 18-40 years, with PCOS and measured AMH levels at baseline, were included in this study. Couples were followed for up to five treatment cycles to determine ovulation (midluteal serum progesterone > 5 ng/mL) and the dose required to achieve ovulation. A lower mean AMH and AMH per follicle was observed among women who ovulated compared with women who never achieved ovulation during the study (geometric mean AMH, 5.54 vs 7.35 ng/mL; P = .0001; geometric mean AMH per follicle, 0.14 vs 0.18; P = .01) after adjustment for age, body mass index, T, and insulin level. As AMH levels increased, the dose of ovulation induction medication needed to achieve ovulation also increased. No associations were observed between antral follicle count and ovulation. These results suggest that high serum AMH is associated with a reduced response to ovulation induction among women with PCOS. Women with higher AMH levels may require higher doses of medication to achieve ovulation.
A stochastic system with infinite interacting components to model the time evolution of the membrane potentials of a population of neurons
Creators: name: Yaginuma, Karina Y.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Methodology (stat.ME)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: We consider a new class of interacting particle systems with a countable number of interacting components. The system represents the time evolution of the membrane potentials of an infinite set of interacting neurons. We prove the existence and uniqueness of the process, using a perfect simulation procedure. We show that this algorithm is successful, that is, we show that the number of steps of the algorithm is almost surely finite. We also construct a perfect simulation procedure for the coupling of a process with a finite number of neurons and the process with a infinite number of neurons. As a consequence, we obtain an upper bound for the error that we make when sampling from a finite set of neurons instead of the infinite set of neurons.
description: arXiv admin note: text overlap with arXiv:0904.1845 by other authors
Foraging with MUSHROOMS: A Mixed-Integer Linear Programming Scheduler for Multimessenger Target of Opportunity Searches with the Zwicky Transient Facility
Creators: name: Parazin, B.
name: Coughlin, Michael W.
name: Singer, Leo P.
name: Gupta, Vaidehi
name: Anand, Shreya
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Electromagnetic follow-up of gravitational wave detections is very resource intensive, taking up hours of limited observation time on dozens of telescopes. Creating more efficient schedules for follow-up will lead to a commensurate increase in counterpart location efficiency without using more telescope time. Widely used in operations research and telescope scheduling, mixed integer linear programming (MILP) is a strong candidate to produce these higher-efficiency schedules, as it can make use of powerful commercial solvers that find globally optimal solutions to provided problems . We detail a new target of opportunity scheduling algorithm designed with Zwicky Transient Facility in mind that uses mixed integer linear programming. We compare its performance to \texttt{gwemopt}, the tuned heuristic scheduler used by the Zwicky Transient Facility and other facilities during the third LIGO-Virgo gravitational wave observing run. This new algorithm uses variable-length observing blocks to enforce cadence requirements and ensure field observability, along with having a secondary optimization step to minimize slew time. \blue{We show that by employing a hybrid method utilizing both this scheduler and \texttt{gwemopt}, the previous scheduler used, in concert, we can achieve an average improvement in detection efficiency of 3\%-11\% over \texttt{gwemopt} alone} for a simulated binary neutron star merger data set consistent with LIGO-Virgo's third observing run, highlighting the potential of mixed integer target of opportunity schedulers for future multimessenger follow-up surveys.
description: 10 pages, 5 figures
Order, Disorder and Monopole Confinement in the Spin-$1/2$ XXZ Model on a Pyrochlore Tube
Creators: name: Feng, Chunhan
name: Wietek, Alexander
name: Stoudenmire, E. Miles
name: Singh, Rajiv R. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the ground state and thermodynamic properties of the spin-half XXZ model, with an Ising interaction $J_z$ and a transverse exchange interaction $J_{x}$, on a pyrochlore tube obtained by joining together elementary cubes in a one-dimensional array. Periodic boundary conditions in the transverse directions ensure that the bulk of the system consists of corner-sharing tetrahedra, with the same local geometry as the pyrochlore lattice. We use exact diagonalization, the density matrix renormalization group (DMRG), and minimally entangled typical thermal states (METTS) methods to study the system. When $J_z$ is antiferromagnetic ($J_{z}>0$) and $J_x$ is ferromagnetic ($J_{x}<0$), we find a transition from a spin liquid to an XY ferromagnet, which has power-law correlations at $T=0$. For $J_{z}<0$ and $J_{x}>0$, spin-two excitations are found to have lower energy than spin-one at the transition away from the fully polarized state, showing evidence for incipient spin-nematic order. When both interactions are antiferromagnetic, we find a non-degenerate ground state with no broken symmetries and a robust energy gap. The low energy spectra evolve smoothly from predominantly Ising to predominantly XY interactions. In the spin-liquid regime of small $|J_{x}|$, we study the confinement of monopole-anti-monopole pairs and find that the confinement length scale is larger for $J_x<0$ than for $J_{x}>0$, although both length scales are very short. These results are consistent with a local spin-liquid phase for the Heisenberg antiferromagnet with no broken symmetries.
A Survey of Trefftz Methods for the Helmholtz Equation
Creators: name: Hiptmair, Ralf
name: Moiola, Andrea
name: Perugia, Ilaria
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N30, 35J05

description: Trefftz methods are finite element-type schemes whose test and trial functions are (locally) solutions of the targeted differential equation. They are particularly popular for time-harmonic wave problems, as their trial spaces contain oscillating basis functions and may achieve better approximation properties than classical piecewise-polynomial spaces. We review the construction and properties of several Trefftz variational formulations developed for the Helmholtz equation, including least squares, discontinuous Galerkin, ultra weak variational formulation, variational theory of complex rays and wave based methods. The most common discrete Trefftz spaces used for this equation employ generalised harmonic polynomials (circular and spherical waves), plane and evanescent waves, fundamental solutions and multipoles as basis functions; we describe theoretical and computational aspects of these spaces, focusing in particular on their approximation properties. One of the most promising, but not yet well developed, features of Trefftz methods is the use of adaptivity in the choice of the propagation directions for the basis functions. The main difficulties encountered in the implementation are the assembly and the ill-conditioning of linear systems, we briefly survey some strategies that have been proposed to cope with these problems.
description: 41 pages, 2 figures, to appear as a chapter in Springer Lecture Notes in Computational Science and Engineering. Differences from v1: added a few sentences in Sections 2.1, 2.2.2 and 2.3.1; inserted small corrections
Chern-Ricci invariance along G-geodesics
Creators: name: Pali, Nefton
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Over a compact oriented manifold, the space of Riemannian metrics and normalised positive volume forms admits a natural pseudo-Riemannian metric $G$, which is useful for the study of Perelman's $\mathcal{W}$ functional. We show that if the initial speed of a $G$-geodesic is $G$-orthogonal to the tangent space to the orbit of the initial point, under the action of the diffeomorphism group, then this property is preserved along all points of the $G$-geodesic. We show also that this property implies preservation of the Chern-Ricci form along such $G$-geodesics, under the extra assumption of complex aniti-invariant initial metric variation and vanishing of the Nijenhuis tensor along the $G$-geodesic. This result is useful for a slice type theorem needed for the proof of the dynamical stability of the Soliton-Kähler-Ricci flow.
On complex deformations of Kähler-Ricci solitons
Creators: name: Pali, Nefton
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We obtain a formal obstruction, i.e. a necessary condition for the existence of polarised complex deformations of Kähler-Ricci solitons. This obstruction is expressed in terms of the harmonic part of the variation of the complex structure.
Concavity of Perelman's $\mathcal{W}$-functional over the space of Kähler potentials
Creators: name: Pali, Nefton
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this short note we observe that the concavity of Perelman's $\mathcal{W}$-functional over a neighborhood of a Kähler-Ricci soliton inside the space of Kähler potentials is a direct consequence of author's solution of the variational stability problem for Kähler-Ricci solitons. Independently, we provide a rather simple proof of this fact based on some elementary formulas obtained in our previous work.
QCD Analysis of $ΔS=0$ Hadronic Parity Violation
Creators: name: Gardner, Susan
name: Muralidhara, Girish
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a QCD analysis of the effective weak Hamiltonian at hadronic energy scales for strangeness-nonchanging ($ΔS=0$) hadronic processes. Performing a leading-order renormalization group analysis in QCD from the $W$ to the ${\cal O}(2\,\rm GeV)$ energy scale, we derive the pertinent effective Hamiltonian for hadronic parity violation, including the effects of both neutral and charged weak currents. We compute the complete renormalization group evolution of all isosectors and the evolution through heavy-flavor thresholds for the first time. We show that the additional four-quark operators that enter below the $W$ mass scale from QCD operator mixing effects form a closed set, and they result in a $12\times 12$ anomalous dimension matrix. Computing the resulting effective Hamiltonian and comparing to earlier results, we affirm the importance of operator mixing effects and find, as an example, that the parity-violating pion-nucleon coupling constant, using the factorization Ansatz and an assessment of the pertinent quark charge of the nucleon in lattice QCD at the 2 GeV scale, is in better agreement with recent experiments.
description: 13 pages, LaTeX, 2 figures; shortened to focus on error assessment in the effective Hamiltonian due, e.g., to scale and higher order in alpha_s uncertainties and in the parity-violating pion-nucleon coupling constant; references added; version to appear in PLB