cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stability under Galerkin truncation of A-stable Runge--Kutta discretizations in time
Creators: name: Oliver, Marcel
name: Wulff, Claudia
Publisher: name: arXiv
Year: 2010
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider semilinear evolution equations for which the linear part is normal and generates a strongly continuous semigroup and the nonlinear part is sufficiently smooth on a scale of Hilbert spaces. We approximate their semiflow by an implicit, A-stable Runge--Kutta discretization in time and a spectral Galerkin truncation in space. We show regularity of the Galerkin-truncated semiflow and its time-discretization on open sets of initial values with bounds that are uniform in the spatial resolution and the initial value. We also prove convergence of the space-time discretization without any condition that couples the time step to the spatial resolution. Then we estimate the Galerkin truncation error for the semiflow of the evolution equation, its Runge--Kutta discretization, and their respective derivatives, showing how the order of the Galerkin truncation error depends on the smoothness of the initial data. Our results apply, in particular, to the semilinear wave equation and to the nonlinear Schrödinger equation.
Measurements of Higgs boson production cross-sections in the $H\toτ^{+}τ^{-}$ decay channel in $pp$ collisions at $\sqrt{s}=13\,\text{TeV}$ with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements of the production cross-sections of the Standard Model (SM) Higgs boson ($H$) decaying into a pair of $τ$-leptons are presented. The measurements use data collected with the ATLAS detector from $pp$ collisions produced at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=13\,\text{TeV}$, corresponding to an integrated luminosity of $139\,\text{fb}^{-1}$. Leptonic ($τ\to\ellν_{\ell}ν_τ$) and hadronic ($τ\to\text{hadrons}~ν_τ$) decays of the $τ$-lepton are considered. All measurements account for the branching ratio of $H\toττ$ and are performed with a requirement $|y_H|<2.5$, where $y_H$ is the true Higgs boson rapidity. The cross-section of the $pp\to H\toττ$ process is measured to be $2.94 \pm 0.21 \text{(stat)} ^{+\,0.37}_{-\,0.32} \text{(syst)}$ pb, in agreement with the SM prediction of $3.17\pm0.09~ \mbox{pb}$. Inclusive cross-sections are determined separately for the four dominant production modes: $2.65 \pm 0.41 \text{(stat)} ^{+\,0.91}_{-\,0.67} \text{(syst)}$ pb for gluon$-$gluon fusion, $0.197 \pm 0.028 \text{(stat)} ^{+\,0.032}_{-\,0.026} \text{(syst)}$ pb for vector-boson fusion, $0.115 \pm 0.058 \text{(stat)} ^{+\,0.042}_{-\,0.040} \text{(syst)}$ pb for vector-boson associated production, and $0.033 \pm 0.031 \text{(stat)} ^{+\,0.022}_{-\,0.017} \text{(syst)}$ pb for top-quark pair associated production. Measurements in exclusive regions of the phase space, using the simplified template cross-section framework, are also performed. All results are in agreement with the SM predictions.
description: 82 pages in total, author list starting page 65, 44 figures, 15 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2019-09/. The results including the correlation matrix are available at https://www.hepdata.net/record/115994
On the origin of noncollinear magnetization coupling across RuX layers
Creators: name: Abert, Claas
name: Koraltan, Sabri
name: Bruckner, Florian
name: Slanovc, Florian
name: Lisik, Juliana
name: Omelchenko, Pavlo
name: Girt, Erol
name: Suess, Dieter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a simple atomistic model for the description of noncollinear coupling in magnetic multilayers with hybrid spacer layers made of Ru alloyed to ferromagnetic atoms such as Fe. In contrast to previous analytical and micromagnetic models that explain the noncollinear coupling by means of lateral fluctuations in the coupling constant, the presented model accounts for atom-atom coupling in all three spatial dimensions within the spacer layer. The new model is able to accurately predict the dependence of the macroscopic bilinear and biquadratic coupling constants on the spacer-layer composition and thickness, showing much better quantitative agreement than lateral-fluctuation models. Moreover, it predicts noncollinear coupling even for infinitely stiff ferromagnetic layers which goes beyond the predictions of previous models.
Healing in the anthropause : reclamation, resacralization and anti-vaccination in Aotearoa/New Zealand
Creators: name: Rittman, Sadie
Publisher: name: University of British Columbia
Year: 2022

description: In a New Age community in Queenstown, Aotearoa/New Zealand, “healing” is a widely used term with spiritual, ecological and social implications that can be examined as a response to capitalism and climate change. It involves reclaiming and re-sacralizing connections and relationships towards re-enchantment. Participatory “connection,” with attending magical consciousness, is emphasized in opposition to the separations that are at the root of our climate crisis. In this context, and particularly as Aotearoa/New Zealand was spared the worst of the pandemic during my research, the social interruption presented by Covid-19 was widely understood as a time of hope and healing, accompanied by profound personal experiences. This understanding would come to clash with government solutions in the form of vaccinations, masks, and mandates, resulting ultimately in a protest at parliament taking shape as a festival. This thesis explores New Age responses to the pandemic in terms of myth, religiosity, and complex ontological dimensions of re-enchantment in the context of climate crisis, situating the conflict over healing as a problem for the Anthropocene. For this community, the pandemic as a cosmopolitical event offered an opportunity to protest “sick society,” its functioning and constructs for truth as nexused in the authority of vaccinations and mandates, in favor of a “new world.”
A 2-dimensional Geometry for Biological Time
Creators: name: Bailly, Francis
name: Longo, Giuseppe
name: Montévil, Maël
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: This paper proposes an abstract mathematical frame for describing some features of biological time. The key point is that usual physical (linear) representation of time is insufficient, in our view, for the understanding key phenomena of life, such as rhythms, both physical (circadian, seasonal ...) and properly biological (heart beating, respiration, metabolic ...). In particular, the role of biological rhythms do not seem to have any counterpart in mathematical formalization of physical clocks, which are based on frequencies along the usual (possibly thermodynamical, thus oriented) time. We then suggest a functional representation of biological time by a 2-dimensional manifold as a mathematical frame for accommodating autonomous biological rhythms. The "visual" representation of rhythms so obtained, in particular heart beatings, will provide, by a few examples, hints towards possible applications of our approach to the understanding of interspecific differences or intraspecific pathologies. The 3-dimensional embedding space, needed for purely mathematical reasons, allows to introduce a suitable extra-dimension for "representation time", with a cognitive significance.
description: Presented in an invited Lecture, conference "Biologie e selezioni naturali", Florence, December 4-8, 2009
Properties of soil and peat humic substances from Latvia
Creators: name: Klavins, M.
name: Purmalis, O.
name: Grandovska, S.
name: Klavina, L.
Publisher: name: Agronomy Research
Year: 2019
Subjects: humic substances
soil
peat
article

description: The acidity, elemental, functional and spectral (UV, fluorescence, IR spectra) characteristics of humic substances isolated from soils of different origin and peat in Latvia are described and compared with values common for humic substances of different origin, to evaluate the character of processes during humification. Substantial dependence of properties of humic substances on the humification conditions are found.
Mass Spectrum Dependence of Higgs-mediated mu-e Transition in the MSSM
Creators: name: Yang, Masaki Jung Soo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we study non-decoupling $μ$ - $e$ transition effects by Higgs-mediated contribution in the MSSM, when some SUSY mass parameters are much greater than TeV. In order to treat CP-odd Higgs mass $m_{A^{0}}$ as a free parameter, we consider the non-universal Higgs mass model (NUHM), and assume the only left- or right-handed sleptons had flavor-mixing mass terms. If both Higgs-mediated and ordinary SUSY contribution are significant, the ratio of branching ratios $\BR(\meg) / \BR(\maleal)$ becomes sensitive to SUSY mass parameters. We investigated these mass-sensitive regions and the behavior of the ratio $\BR(\meg) / \BR(\maleal)$ in some mass spectrum of the NUHM, and found that this ratio drastically depends on the mass spectrum structure and chirality of flavor violation. Log factor from two split mass scale influences the way of interference between gaugino- and Higgs-mediated contributions significantly.
description: 19 pages, 8 figures, it will appear in PRD
Seniority and $(\frac{9}{2})^n$ configurations in neutron-rich Nickel isotopes
Creators: name: Sidorov, S.
name: Zhulyaeva, D.
name: Tretyakova, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Excited states in low-energy spectra in $^{70-76}$Ni are considered. To this end, pairing forces in form of surface delta interaction are employed to account for formation of the ground state multiplet with seniority $ν= 2$ states. The multiplet splitting is described with mass relations of masses of neighbouring nuclei. Subsequently, seniority model is used to reproduce or predict the states $ν= 3$ in odd-even isotopes and $ν= 4$ in even-even isotopes. Correct account of $2_1^+$ state should allow for description of reversed order of states $J = 4$ with $ν= 2$ and $ν= 4$ observed in experiment. The results obtained are compared with the structure of similar multiplets in $N=50$ isotones.
description: to be published in Chinese Physics C
Biosynthesis of glycosidase inhibitors on wheat bread wastes hydrolysate medium by Streptomyces sp. 170
Creators: name: Sharova, N.
name: Ibrahim, M.
name: Prensiva, A.
name: Vybornova, T.
name: Barakova, N.
name: Manzhieva, B.
Publisher: name: Agronomy Research
Year: 2019
Subjects: bread hydrolysate medium
corn starch medium
Streptomyces sp. 170
inhibitory activity
pancreatic α-amylase inhibitors
article

description: The aim of the present study is to investigate the potential effect of bread hydrolysate as a novel nutrient medium for cultivating Streptomyces sp. 170 (S.170). Moreover, it evaluates the productivity and inhibitory activity of pancreatic α-amylase inhibitors (PAAI). Bread hydrolysate medium (BHM) and corn starch hydrolysate medium (CHM) prepared with αamylase enzyme concentrations (1.5 and 2.5 units g -1 bread) and (1.5 units g -1 corn starch), respectively were utilized in the study. The Seherde-Blair and modified Akulova methods were applied to evaluate the carbohydrates concentration and the inhibitory activity of the media respectively. Results of bread and corn media were compared to each other. Furthermore, the activity of PAAI synthesized by S.170 was compared to other Streptomyces species. The results showed a significant difference (P < 0.05) between the total simple sugars (glucose + maltose) concentration produced in CHM (27.5%) and BHM prepared with α-amylase 1.5 units (45.1%). Besides, BHM produced by α-amylase 2.5 units demonstrated the maximum total concentration of simple sugars (49.9%). In addition, 48 h of S.170 incubation were quite enough to exhibit the highest inhibitory activity (2,632 IU mL-1 ) in BHM prepared with α-amylase 2.5 units. The analysis demonstrated a non-significant difference in the inhibitory activity of PAAI in CMH (1,300 IU mL-1 ) and BMH with α-amylase 1.5 units (1,111 IU mL-1 ). Also, compared to other Streptomyces species, S.170 conferred highly active PAAI. In conclusion, BHM showed its efficiency to a great extent in the cultivation of S.170 and production of PAAI with a notable high activity.
A study of interfacial heat transfer in the permanent die low pressure and counter pressure casting processes
Creators: name: Wei, Chunying
Publisher: name: University of British Columbia
Year: 2022

description: Counter pressure casting (CPC) process is a relatively new, emerging technology developed for producing load-bearing parts. It is believed that CPC produces parts with superior quality compared to those produced by the conventional low pressure die casting (LPDC) process since the die cavity is placed within a pressurized chamber (2-3 bar) in CPC. This feature is claimed to benefit the process with respect to both filling and solidification. However, few studies are available in the literature providing data to support this claim. Therefore, this research program is aimed to improve the fundamental understanding of the transport phenomena occurring in the CPC process with a focus on the heat transfer through the die/casting interface, using a combination of experimental and modelling techniques. A series of experiments were conducted on a commercial CPC machine to produce a custom-designed “H-shaped” aluminum casting. Three process conditions, where the chamber pressure was varied, were tested. Results showed that in-die temperatures at various locations, and the secondary dendrite arm space (SDAS) were not significantly affected by the chamber pressure in the range tested (1200-3000 mbar). However, die filling was delayed at a higher counter pressure, possibly due to the increased viscosity and density of the air in the die cavity. A thermal model and a coupled thermal-stress model of the CPC process have been implemented within the commercial finite element (FE) package ABAQUS™ to simulate the process conditions in the experiments. The coupled thermal-stress model was developed using a novel modelling methodology established in the research. The model is able to utilize the deformed state of the hot die and update the casting geometry based on the hot die geometry at the beginning of a casting cycle. Thus, the stress-strain evolution of the die and the casting, the die/casting interface behaviour, and the associated heat transfer can be fundamentally described. A thermal-only model was also formulated and utilized to develop a second interfacial heat transfer coefficient that is a function of interface temperature. The results of the comparison indicated a slight improvement in accuracy obtained with the thermal-stress model in areas prone to gap formation.
On random fractals with infinite branching: definition, measurability, dimensions
Creators: name: Berlinkov, Artemi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 28A80, 37F40, 60D05

description: We discuss the definition and measurability questions of random fractals and find under certain conditions a formula for upper and lower Minkowski dimensions. For the case of a random self-similar set we obtain the packing dimension.
description: 11 pages
Another Solution for Some Optimum Allocation Problem
Creators: name: Wójciak, Wojciech
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: Applications (stat.AP)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We derive optimality conditions for the optimum sample allocation problem in stratified sampling, formulated as the determination of the fixed strata sample sizes that minimize the total cost of the survey, under the assumed level of variance of the stratified $π$ estimator of the population total (or mean) and one-sided upper bounds imposed on sample sizes in strata. In this context, we presume that the variance function is of some generic form that, in particular, covers the case of the simple random sampling without replacement design in strata. The optimality conditions mentioned above will be derived from the Karush-Kuhn-Tucker conditions. Based on the established optimality conditions, we provide a formal proof of the optimality of the existing procedure, termed here as LRNA, which solves the allocation problem considered. We formulate the LRNA in such a way that it also provides the solution to the classical optimum allocation problem (i.e. minimization of the estimator's variance under a fixed total cost) under one-sided lower bounds imposed on sample sizes in strata. In this context, the LRNA can be considered as a counterparty to the popular recursive Neyman allocation procedure that is used to solve the classical problem of an optimum sample allocation with added one-sided upper bounds. Ready-to-use R-implementation of the LRNA is available through our stratallo package, which is published on the Comprehensive R Archive Network (CRAN) package repository.
A general framework for nonlocal Neumann problems
Creators: name: Foghem, Guy
name: Kassmann, Moritz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 28A80, 35J20, 35J92, 46B10, 46E35, 47A07, 49J40, 49J45

description: Within the framework of Hilbert spaces, we solve nonlocal problems in bounded domains with prescribed conditions on the complement of the domain. Our main focus is on the inhomogeneous Neumann problem in a rather general setting. We also study the transition from complement value problems to local boundary value problems. Several results are new even for the fractional Laplace operator. The setting also covers relevant models in the framework of peridynamics.
description: Published in Commun. Math. Sci.: https://dx.doi.org/10.4310/CMS.2024.v22.n1.a2
Exploring new states of matter with a photonic emulator
Creators: name: Karbstein, Felix
name: Stützer, Simon
name: Gies, Holger
name: Szameit, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We implement the equation of motion of the large-N Gross-Neveu model from strong interaction physics in photonic waveguide arrays and study one of its paradigmatic multi-fermion bound state solutions in an optical experiment. The present study constitutes an important first step towards waveguide-based simulations of phenomena relevant for high-energy physics.
A research on models of the photosynthetic light response curves on the example of evergreen types of plants
Creators: name: Korsakova, S.
name: Plugatar, Yu.
name: Ilnitsky, O.
name: Karpukhin, Yu.
Publisher: name: Agronomy Research
Year: 2019
Subjects: evergreen species
CO2 exchange
photosynthetic light response curves
fitting
nonlinear regression
article

description: The peculiarities of CO2 exchange in the leaves of ornamental evergreen plant species that are common in the Southern coast of Crimea were studied: Nerium oleander L., Laurus nobilis L., Aucuba japonica Thunb., and Melissa officinalis L. The results of approximation of the most commonly used four models of PN/I curves with the measured data were compared. The values of the parameters 𝑃𝑔𝑚𝑎𝑥,  (𝐼𝑐𝑜𝑚𝑝) , 𝑅𝐷, 𝐼𝑚𝑎𝑥, which were calculated from the modified Michaelis-Menten model in comparison with the measured values were higher by 5–15%, and those that were calculated by the hyperbolic tangent model – lower by 3–13%. The use of a modified rectangular hyperbola model, which is capable of describing the photoinhibition by the nonrectangular hyperbola and the modified nonrectangular hyperbola model, showed a high degree of adequacy of the proposed models for describing the true dependence between the rate of photosynthesis and the light intensity for Nerium oleander L., Laurus nobilis L., Aucuba japonica Thunb. and Melissa officinalis L. Measurements of CO2 exchange in leaves under similar environmental conditions showed significant differences in the parameters of the PN/I curves: the light compensation point, the rate of photosynthesis and dark respiration, light saturation, and quantum yield. The highest values of photosynthesis efficiency were observed in Nerium oleander, the lowest values in Aucuba japonica – the light saturation was noted at a very low photosynthetically active radiation. The lower values of the light compensation point and the saturation constants in Laurus nobilis and Aucuba japonica indicate their effective use of the photosynthetically active radiation, which allows them to survive in conditions of durable shade.
Modeling Cosmological Perturbations of Thermal Inflation
Creators: name: Bae, Jeong-Myeong
name: Hong, Sungwook E.
name: Zoe, Heeseung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider a simple system consisting of matter, radiation and vacuum components to model the impact of thermal inflation on the evolution of primordial perturbations. The vacuum energy magnifies the primordial modes entering the horizon before its domination, making them potentially observable, and the resulting transfer function reflects the phase changes and energy contents. To determine the transfer function, we follow the curvature perturbation from well outside the horizon during radiation domination to well outside the horizon during vacuum domination and evaluate it on a constant radiation density hypersurface, as is appropriate for the case of thermal inflation. The shape of the transfer function is determined by the ratio of vacuum energy to radiation at matter-radiation equality, which we denote by $\upsilon$, and has two characteristic scales, $k_{\rm a}$ and $k_{\rm b}$, corresponding to the horizon sizes at matter radiation equality and the beginning of the inflation, respectively. If $\upsilon \ll 1$, the universe experiences radiation, matter and vacuum domination eras and the transfer function is flat for $k \ll k_{\rm b}$, oscillates with amplitude $1/5$ for $ k_{\rm b} \ll k \ll k_{\rm a}$ and oscillates with amplitude $1$ for $k \gg k_{\rm a}$. For $\upsilon \gg 1$, the matter domination era disappears, and the transfer function reduces to being flat for $k \ll k_{\rm b}$ and oscillating with amplitude $1$ for $k \gg k_{\rm b}$.
description: 22 pages, 6 figures, accepted to the Class. Quant. Grav
Casimir-Polder interaction between an atom and a dielectric grating
Creators: name: Contreras-Reyes, Ana M.
name: Guérout, Romain
name: Neto, Paulo A. Maia
name: Dalvit, Diego A. R.
name: Lambrecht, Astrid
name: Reynaud, Serge
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop the scattering approach to calculate the exact dispersive Casimir-Polder potential between a ground-state atom and a rectangular grating. Our formalism allows, in principle, for arbitrary values of the grating amplitude and period, and of the atom-grating distance. We compute numerically the potential for a Rb atom on top of a Si grating and compare the results with the potential for a flat surface taken at the local atom-surface distance (proximity force approximation). Except for very short separation distances, the potential is nearly sinusoidal along the direction transverse to the grooves.
description: 7 pages, 5 figures
Upper bounds on the solutions to $n = p+m^2$
Creators: name: Nayebi, Aran
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11P32, Secondary 11P55

description: Hardy and Littlewood conjectured that every large integer $n$ that is not a square is the sum of a prime and a square. They believed that the number $\mathcal{R}(n)$ of such representations for $n = p+m^2$ is asymptotically given by \mathcal{R}(n) \sim \frac{\sqrt{n}}{\log n}\prod_{p=3}^{\infty}(1-\frac{1}{p-1}(\frac{n}{p})), where $p$ is a prime, $m$ is an integer, and $(\frac{n}{p})$ denotes the Legendre symbol. Unfortunately, as we will later point out, this conjecture is difficult to prove and not \emph{all} integers that are nonsquares can be represented as the sum of a prime and a square. Instead in this paper we prove two upper bounds for $\mathcal{R}(n)$ for $n \le N$. The first upper bound applies to \emph{all} $n \le N$. The second upper bound depends on the possible existence of the Siegel zero, and assumes its existence, and applies to all $N/2 < n \le N$ but at most $\ll N^{1-δ_1}$ of these integers, where $N$ is a sufficiently large positive integer and $0< δ_1 \le 0.000025$.
The Spectrum of Goldstini and Modulini
Creators: name: Cheung, Clifford
name: D'Eramo, Francesco
name: Thaler, Jesse
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: When supersymmetry is broken in multiple sectors via independent dynamics, the theory furnishes a corresponding multiplicity of "goldstini" degrees of freedom which may play a substantial role in collider phenomenology and cosmology. In this paper, we explore the tree-level mass spectrum of goldstini arising from a general admixture of F-term, D-term, and almost no-scale supersymmetry breaking, employing non-linear superfields and a novel gauge fixing for supergravity discussed in a companion paper. In theories of F-term and D-term breaking, goldstini acquire a mass which is precisely twice the gravitino mass, while the inclusion of no-scale breaking renders one of these modes, the modulino, massless. We argue that the vanishing modulino mass can be explained in terms of an accidental and spontaneously broken "global" supersymmetry.
description: 10 pages, 2 figures; v2: typo corrected, references updated; v3: version to appear in JHEP
Symmetry-protected exceptional and nodal points in non-Hermitian systems
Creators: name: Sayyad, Sharareh
name: Stalhammar, Marcus
name: Rodland, Lukas
name: Kunst, Flore K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: One of the unique features of non-Hermitian~(NH) systems is the appearance of non-Hermitian degeneracies known as exceptional points~(EPs). The extensively studied defective EPs occur when the Hamiltonian becomes non-diagonalizable. Aside from this degeneracy, we show that NH systems may host two further types of degeneracies, namely, non-defective EPs and ordinary (Hermitian) nodal points. The non-defective EPs manifest themselves by i) the diagonalizability of the NH Hamiltonian at these points, ii) the non-diagonalizability of the Hamiltonian along certain intersections of these points and iii) instabilities in the Jordan decomposition when approaching the points from certain directions. We demonstrate that certain discrete symmetries, namely parity-time, parity-particle-hole, and pseudo-Hermitian symmetry, guarantee the occurrence of both defective and non-defective EPs. We extend this list of symmetries by including the NH time-reversal symmetry in two-band systems. Two-band and four-band models exemplify our findings. Through an example, we further reveal that ordinary nodal points may coexist with defective EPs in NH models when the above symmetries are relaxed.
description: 6+2 Pages, 4+2 Figures
Additional file 1: of Knockdown of long non-coding RNA NEAT1 inhibits glioma cell migration and invasion via modulation of SOX2 targeted by miR-132
Creators: name: Zhou, Ke
name: Zhang, Chi
name: Yao, Hui
name: Zhang, Xuewen
name: Zhou, Youxin
name: Che, Yanjun
name: Huang, Yulun
Publisher: name: figshare
Year: 2018
Subjects: Biochemistry
Molecular Biology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Developmental Biology
Cancer

description: Table S1. The characteristics of the included patients in this study. (DOCX 17 kb)
Final Report on a Development of a Geographic Transportation Network Generation and Evaluation Model
Creators: name: Morlok, Edward K.
name: Peterson, Richard B.
name: Morlok, Edward K.
name: Peterson, Richard B.
Publisher: name: Unknown
Year: 1970
Subjects: Public Economics

description: Presented at the 11th Transportation Research Forum meeting, Oct. 22-24, 1970, New Orleans, LA
The mass of the dark matter particle from theory and observations
Creators: name: de Vega, H. J.
name: Salucci, P.
name: Sanchez, N. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We combine observed properties of galaxies as the core density and radius with the theoretical linear evolution of density fluctuations computed from first principles since the end of inflation till today. The halo radius r_0 is computed in terms of cosmological parameters. The theoretical density profiles rho(r)/rho(0) have an universal shape as a function of r/r_0 which reproduces the observations. We show that the linear approximation to the Boltzmann-Vlasov equation is valid for very large galaxies and correctly provides universal quantities which are common to all galaxies, as the surface density and density profile. By matching the theoretically computed surface density to its observed value we obtain (i) the decreasing of the phase-space density during the MD era (ii) the mass of the dark matter particle which turns to be between 1 and 2 keV and the decoupling temperature T_d which turns to be above 100 GeV (iii) the core vs. cusp discrimination: keV dark matter particles produce cored density profiles while wimps (m \sim 100 GeV, T_d \sim 5 GeV) produce cusped profiles at scales about 0.003 pc. These results are independent of the particle model and vary very little with the statistics of the dark matter particle. Non-universal galaxy quantities (which need to include non-linear effects as mergers and baryons) are reproduced in the linear approximation up to a factor of order one for the halo radius r_0, galaxy mass M_{gal}, halo central density rho_{0} and velocity dispersion sqrt{\bar {v^2}_{halo}} in the limiting case of large galaxies (both r_0 and M_{gal} large). This shows the power of the linear approximation scheme: although it cannot capture the whole content of the structure formation, it correctly provides universal quantities which as well as the main non-universal galaxy properties.
description: 17 pages, 15 figures, improved and expanded version to appear in New Astronomy
Dark Matter Production during the Thermalization Era
Creators: name: Harigaya, Keisuke
name: Mukaida, Kyohei
name: Yamada, Masaki
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019
Subjects: dark matter: production
dark matter: mass
temperature: reheating
inflaton: decay
plasma
inflation

description: We revisit the non-thermal dark matter (DM) production during the thermalization and reheating era after inflation. The decay of inflaton produces high-energy particles that are thermalized to complete the reheating of the Universe. Before the thermalization is completed, DM can be produced from a collision between the high-energy particles and/or the ambient plasma. We calculate the DM abundance produced from these processes for the case where the cross section of the DM production is proportional to the $n$-th power of the center of mass energy. We find that the collision between the high-energy particles is almost always dominant for $n \gtrsim 4$ while it is subdominant for $n \lesssim 2$. The production from the ambient plasma is dominant when $n \lesssim 3$ and the reheating temperature is of the order of or larger than the DM mass. The production from a collision between the high-energy particle and the ambient plasma is important for $n \lesssim 2$ and the reheating temperature is much lower than the DM mass.
Simulations of core formation for frequent dark matter self-interactions
Creators: name: Kummer, Janis
name: Brüggen, Marcus
name: Dolag, Klaus
name: Kahlhoefer, Felix
name: Schmidt-Hoberg, Kai
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019
Subjects: dark matter: halo
conductivity: thermal
formation
hydrodynamics
scattering
capture

description: We present the first $N$-body simulations that use smoothed particle hydrodynamics to capture the effect of dark matter self-interactions which are too frequent to be resolved explicitly. The relevant energy transfer equations are derived, the appropriate thermal conductivity is determined and the effects of different smoothing kernels are studied. We apply our framework to simulate the formation of isothermal cores in isolated dark matter haloes and determine the core growth rate as a function of the self-scattering cross section. Our approach may be combined with explicit simulations of rare scatterings in order to simulate accurately the effects of arbitrary dark matter self-interactions in future cosmological simulations.
Understanding the Spatiotemporal Resolution of Near-Field Photoacoustics from Nanostructures
Creators: name: Wang, Hanwei
name: Chen, Yun-Sheng
name: Zhao, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Understanding the mechanism of photoacoustic generation at the nano-scale is key to developing more efficient photoacoustic devices and agents. Unlike the far-field photoacoustic effect that has been well employed in imaging, the near-field profile leads to a complex wave-tissue interaction but is under-studied. Here we show that the spatiotemporal profile of the near-field photoacoustic waves can be shaped by laser pulses, anisotropy, and nanoparticle(s) spatial arrangement. Using a gold nanorod as an example, we discovered that the near-field photoacoustic amplitude in the short axis is ~75% stronger than the long axis, and the anisotropic spatial distribution converges to an isotropic spherical wave at ~50 nm away from the nanorod's surface. We further extend the model to asymmetric gold nanostructures by arranging isotropic nanospheres anisotropically with broken symmetry to achieve a precisely controlled near-field photoacoustic "focus" largely within an acoustic wavelength.
description: The main text contains 25 pages and 5 figures; the supplementary information contains 9 pages and 5 figures
New Physics in $b \to s \ell^+ \ell^-$ confronts new data on Lepton Universality
Creators: name: Ciuchini, Marco
name: Coutinho, António M.
name: Fedele, Marco
name: Franco, Enrico
name: Paul, Ayan
name: Silvestrini, Luca
name: Valli, Mauro
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: In light of the very recent updates on the $R_K$ and $R_{K^*}$ measurements from the LHCb and Belle collaborations, we systematically explore here imprints of New Physics in $b \to s \ell^+ \ell^- $ transitions using the language of effective field theories. We focus on effects that violate Lepton Flavour Universality both in the Weak Effective Theory and in the Standard Model Effective Field Theory. In the Weak Effective Theory we find a preference for scenarios with the simultaneous presence of two operators, a left-handed quark current with vector muon coupling and a right-handed quark current with axial muon coupling, irrespective of the treatment of hadronic uncertainties. In the Standard Model Effective Field Theory we select different scenarios according to the treatment of hadronic effects: while an aggressive estimate of hadronic uncertainties points to the simultaneous presence of two operators, one with left-handed quark and muon couplings and one with left-handed quark and right-handed muon couplings, a more conservative treatment of hadronic matrix elements leaves room for a broader set of scenarios, including the one involving only the purely left-handed operator with muon coupling.
DATA PERFORMANCE ON COMPARATIVE STUDY OF PUBLIC SECTOR AND PRIVATE SECTOR BANKS IN INDIA.pdf
Creators: name: HARALAYYA, BHADRAPPA
Publisher: name: figshare
Year: 2023
Subjects: Banking, finance and securities law
Banking, finance and investment not elsewhere classified
Finance

description: In this paper, we discussed the data statistical analysis for ANOVA for private and public sector banks with null hypothesis testing. The comparative study is helpful for the performance of the banking system and quality control with customer satisfaction and we have investigated only for Indian banks such as Indian bank, IOB, Canara bank, HDFC, KVB, CUB, etc.
A Cost Comparison of Alternative Refrigeration Systems in Long Distance Trucking
Creators: name: Steiner, Henry Malcolm
name: Poythress, Paul
name: Steiner, Henry Malcolm
name: Poythress, Paul
Publisher: name: Unknown
Year: 1970
Subjects: Public Economics

description: Presented at the 11th Transportation Research Forum meeting, Oct. 22-24, 1970, New Orleans, LA
The Role of Monotonicity in the Epistemic Analysis of Strategic Games
Creators: name: Apt, Krzysztof R.
name: Zvesper, Jonathan A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: It is well-known that in finite strategic games true common belief (or common knowledge) of rationality implies that the players will choose only strategies that survive the iterated elimination of strictly dominated strategies. We establish a general theorem that deals with monotonic rationality notions and arbitrary strategic games and allows to strengthen the above result to arbitrary games, other rationality notions, and transfinite iterations of the elimination process. We also clarify what conclusions one can draw for the customary dominance notions that are not monotonic. The main tool is Tarski's Fixpoint Theorem.
description: 20 pages
Tracking of total sedentary time and sedentary patterns in youth: a pooled analysis using the International Children’s Accelerometry Database (ICAD)
Creators: name: Van Ekris, Evi
name: Wijndaele, Katrien
name: Altenburg, Teatske M.
name: Atkin, Andrew J.
name: Twisk, Jos
name: Andersen, Lars B.
name: Janz, Kathleen F.
name: Froberg, Karsten
name: Northstone, Kate
name: Page, Angie S.
name: Sardinha, Luis B.
name: Van Sluijs, Esther M. F.
name: Chinapaw, Mai
name: Andersen, L. B.
name: Anderssen, S.
name: Atkin, A. J.
name: Cardon, G.
name: Davey, R.
name: Ekelund, U.
name: Esliger, D. W.
name: Hallal, P.
name: Hansen, B. H.
name: Janz, K. F.
name: Kriemler, S.
name: Møller, N.
name: Northstone, K.
name: Page, A.
name: Pate, R.
name: Puder, J. J.
name: Reilly, J.
name: Salmon, J.
name: Sardinha, L. B.
name: Sherar, L. B.
name: Van Sluijs, E. M. F.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Research
ICAD
Sedentary time
Accelerometer
Tracking
Children
Adolescents
Objective assessment

description: Abstract: Background: To gain more understanding of the potential health effects of sedentary time, knowledge is required about the accumulation and longitudinal development of young people’s sedentary time. This study examined tracking of young peoples’ total and prolonged sedentary time as well as their day-to-day variation using the International Children’s Accelerometry Database. Methods: Longitudinal accelerometer data of 5991 children (aged 4-17y) was used from eight studies in five countries. Children were included if they provided valid (≥8 h/day) accelerometer data on ≥4 days, including ≥1 weekend day, at both baseline and follow-up (average follow-up: 2.7y; range 0.7–8.2). Tracking of total and prolonged (i.e. ≥10-min bouts) sedentary time was examined using multilevel modelling to adjust for clustering of observations, with baseline levels of sedentary time as predictor and follow-up levels as outcome. Standardized regression coefficients were interpreted as tracking coefficients (low: < 0.3; moderate: 0.3–0.6; high: > 0.6). Results: Average total sedentary time at study level ranged from 246 to 387 min/day at baseline and increased annually by 21.4 min/day (95% confidence interval [19.6–23.0]) on average. This increase consisted almost entirely of prolonged sedentary time (20.9 min/day [19.2–22.7]). Total (standardized regression coefficient (B) = 0.48 [0.45–0.50]) and prolonged sedentary time (B = 0.43 [0.41–0.45]) tracked moderately. Tracking of day-to-day variation in total (B = 0.04 [0.02–0.07]) and prolonged (B = 0.07 [0.04–0.09]) sedentary time was low. Conclusion: Young people with high levels of sedentary time are likely to remain among the people with highest sedentary time as they grow older. Day-to-day variation in total and prolonged sedentary time, however, was rather variable over time.
Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold
Creators: name: CLEO Collaboration
name: Pedlar, T. K.
name: Cronin-Hennessy, D.
name: Hietala, J.
name: Dobbs, S.
name: Metreveli, Z.
name: Seth, K. K.
name: Tomaradze, A.
name: Xiao, T.
name: Martin, L.
name: Powell, A.
name: Wilkinson, G.
name: Mendez, H.
name: Ge, J. Y.
name: Miller, D. H.
name: Shipsey, I. P. J.
name: Xin, B.
name: Adams, G. S.
name: Hu, D.
name: Moziak, B.
name: Napolitano, J.
name: Ecklund, K. M.
name: Insler, J.
name: Muramatsu, H.
name: Park, C. S.
name: Pearson, L. J.
name: Thorndike, E. H.
name: Ricciardi, S.
name: Thomas, C.
name: Artuso, M.
name: Blusk, S.
name: Mountain, R.
name: Skwarnicki, T.
name: Stone, S.
name: Zhang, L. M.
name: Bonvicini, G.
name: Cinabro, D.
name: Lincoln, A.
name: Smith, M. J.
name: Zhou, P.
name: Zhu, J.
name: Naik, P.
name: Rademacker, J.
name: Asner, D. M.
name: Edwards, K. W.
name: Randrianarivony, K.
name: Tatishvili, G.
name: Briere, R. A.
name: Vogel, H.
name: Onyisi, P. U. E.
name: Rosner, J. L.
name: Alexander, J. P.
name: Cassel, D. G.
name: Das, S.
name: Ehrlich, R.
name: Gibbons, L.
name: Gray, S. W.
name: Hartill, D. L.
name: Heltsley, B. K.
name: Kreinick, D. L.
name: Kuznetsov, V. E.
name: Patterson, J. R.
name: Peterson, D.
name: Riley, D.
name: Ryd, A.
name: Sadoff, A. J.
name: Shi, X.
name: Sun, W. M.
name: Yelton, J.
name: Rubin, P.
name: Lowrey, N.
name: Mehrabyan, S.
name: Selen, M.
name: Wiss, J.
name: Libby, J.
name: Kornicer, M.
name: Mitchell, R. E.
name: Shepherd, M. R.
name: Tarbert, C. M.
name: Besson, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using 586pb^-1 of e^+e^- collision data at E_CM = 4170MeV, produced at the CESR collider and collected with the CLEO-c detector, we observe the process e^+e^- --> pi^+ pi^- h_c(1P). We measure its cross section to be 15.6+-2.3+-1.9+-3.0pb, where the third error is due to the external uncertainty on the branching fraction of psi(2S) --> pi^0 h_c(1P), which we use for normalization. We also find evidence for e^+e^- --> eta h_c(1P) at 4170MeV at the 3sigma level, and see hints of a rise in the e^+e^- --> pi^+ pi^- h_c(1P) cross section at 4260MeV.
description: 9 pages, 4 figures, as published
Multi-Frequency Joint Community Detection and Phase Synchronization
Creators: name: Wang, Lingda
name: Zhao, Zhizhen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper studies the joint community detection and phase synchronization problem on the \textit{stochastic block model with relative phase}, where each node is associated with an unknown phase angle. This problem, with a variety of real-world applications, aims to recover the cluster structure and associated phase angles simultaneously. We show this problem exhibits a \textit{``multi-frequency''} structure by closely examining its maximum likelihood estimation (MLE) formulation, whereas existing methods are not originated from this perspective. To this end, two simple yet efficient algorithms that leverage the MLE formulation and benefit from the information across multiple frequencies are proposed. The former is a spectral method based on the novel multi-frequency column-pivoted QR factorization. The factorization applied to the top eigenvectors of the observation matrix provides key information about the cluster structure and associated phase angles. The second approach is an iterative multi-frequency generalized power method, where each iteration updates the estimation in a matrix-multiplication-then-projection manner. Numerical experiments show that our proposed algorithms significantly improve the ability of exactly recovering the cluster structure and the accuracy of the estimated phase angles, compared to state-of-the-art algorithms.
description: Fixed a minor error and several typos. Accepted by IEEE Transactions on Signal and Information Processing over Networks
Robust IoT-enabled sensors for bridge scour monitoring : laboratory and field studies
Creators: name: Farooq, Mohammed
Publisher: name: University of British Columbia
Year: 2022

description: This thesis evaluates industrially-available sensors for their effectiveness in real-time monitoring of foundation soil level and bridge scour. Two types of photoelectric sensors, namely diffusive-reflective and through-beam, and two types of dielectric (capacitance) sensors, namely low frequency printer-circuit board type, and higher frequency stainless steel type, were independently investigated. Laboratory investigations carried out in a hydraulic flume used a simulated bridge pier comprising of an array of sensors mounted vertically and interfaced via Arduino. The state of “burial” in foundation soil or the state of “exposure” to water was determined from the sensor output. On scouring, the sensors provided an instantaneous shift in signal from the state of “buried” to “exposed”, and vice versa. The results indicate that all the four sensors could be monitor sediment level, scour, scour-hole refill, and scouring rate. The dielectric sensors were susceptible to misinterpretation at high concentrations of NaCl in water. Improvements on isolating the effects of NaCl were made using lab-made steel electrodes excited using an external electrical waveform ranging from 1 Hz to 70 MHz. The results indicate that low frequencies were influenced by NaCl content, whereas at high frequencies (35-50 MHz), the sensors performed well. Although a single signal frequency worked well for the range of NaCl content from 0% to 3.5%, the use of two or more frequencies is recommended for higher reliability. Passive thermometry using a vertical array of DS18B20 digital temperature sensors buried at different depths in sediment and water studied the diurnal thermal variations in the media. Although the technique required historic data (few diurnal cycles), a clear distinction could be noticed in the buried and the exposed temperature waveforms. A field prototype using photoelectric sensors was installed in a small creek in UBC, and a second prototype using dielectric and temperature sensors was installed at a scour-susceptible over-water platform on Guichon Creek, Burnaby. Both the field prototypes validated laboratory results, were able to notify the onset and progression of scour around the pier over long periods of time. The detected scour events and subsequent re-deposition could be correlated to reference water level and rainfall data.