cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exact solutions of a generalized variant of the derivative nonlinear Schrodinger equation in a Scarff II external potential and their stability properties
Creators: name: Khare, Avinash
name: Cooper, Fred
name: Dawson, John F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We obtain exact solitary wave solutions of a variant of the generalized derivative nonlinear Schrodinger\equation in 1+1 dimensions with arbitrary values of the nonlinearity parameter $κ$ in a Scarf-II potential. This variant of the usual derivative nonlinear Schrodinger equation has the properties that for real external potentials, the dynamics is derivable from a Lagrangian. The solitary wave and trapped solutions have the same form as those of the usual derivative nonlinear Schrodinger equation. We show that the solitary wave solutions are orbitally stable for $κ\leq 1$ We find new exact nodeless solutions to the bound states in the external complex potential which are related to the static solutions of the equation. We also use a collective coordinate approximation to analyze the stability of the trapped solutions when the external potential is real.
description: 26 pages, 4 figures
Additional file 1 of Comprehensive analysis of m6A related gene mutation characteristics and prognosis in colorectal cancer
Creators: name: Jiang, Tao
name: Xing, Linshuai
name: Zhao, Lipeng
name: Ye, Ziqi
name: Yu, Dong
name: Lin, Shengtao
Publisher: name: figshare
Year: 2023
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1: Table S1. Primers.
title: Voyages dans la partie septentrionale du Brésil Texte imprimé
Creators: name: Koster
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: : pl. ; in-8
description: Source: Bibliothèque Patrimoniale Villon Patrimoine Magasin Mtm-6730
Boundary Fluctuations of AdS String
Creators: name: Mukherji, Sudipta
name: Panda, Sudhakar
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyse the world-sheet perturbations of string theory formulated around $AdS_3$ background. We identify a set of operators that, while added to the world-sheet action, generate the boundary fluctuations of $AdS_3$. The effect of these operators can be collectively defined in terms of Liouville field living on the $AdS_3$ boundary. We then study various deformations of $AdS_3$ generated by boundary fluctuations by turning on suitable world-sheet couplings. We also discuss certain small fluctuations around the BTZ black hole.
description: 10 pages, harvmac, no figure
MATHICSE Technical Report : Multilevel tensor approximation of PDEs with random data
Creators: name: Ballani, Jonas
name: Kressner, Daniel
name: Peters, Michael Dieter
Publisher: name: Écublens, MATHICSE
Year: 2019

description: In this paper, we introduce and analyze a new low-rank multilevel strategy for the solution of random diffusion problems. Using a standard stochastic collocation scheme, we first approximate the infinite dimensional random problem by a deterministic parameter-dependent problem on a high-dimensional parameter domain. Given a hier-archy of finite element discretizations for the spatial approximation, we make use of a multilevel framework in which we consider the differences of the solution on two consecutive finite element levels in the collocation points. We then address the approximation ofthese high-dimensional differences by adaptive low-rank tensor techniques. This allows to equilibrate the error on all levels by exploiting analytic and algebraic properties of thesolution at the same time. We arrive at an explicit representation in a low-rank tensor format of the approximate solution on the entire parameter domain, which can be used for, e.g., the direct and cheap computation of statistics. Numerical results are provided in order to illustrate the approach.
title: ADCO, Neuvième cartulaire de Saint-Étienne de Dijon (1661 - 1684), Cart. 32 (G 136), 745 folios, f. 1395
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP

description: Neuvième cartulaire de Saint-Étienne de Dijon (1661 - 1684), Archives départementales de la Côte-d'Or, Cart. 32 (G 136), 745 folios, f. 1395, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Neuvième cartulaire de Saint-Étienne de Dijon (1661 - 1684), Archives départementales de la Côte-d'Or, Cart. 32 (G 136), 745 folios, f. 1395, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
MATHICSE Technical Report : Fast computation of the matrix exponential for a Toeplitz matrix
Creators: name: Kressner, Daniel
name: Luce, Robert
Publisher: name: Écublens, MATHICSE
Year: 2019

description: The computation of the matrix exponential is a ubiquitous operation in numerical mathematics, and for a general, unstructured n×n matrix it can be computed in O(n3) operations. An interesting problem arises if the input matrix is a Toeplitz matrix, for example as the result of discretizing integral equations with a time invariant kernel. In this case it is not obvious how to take advantage of the Toeplitz structure, as the exponential of a Toeplitz matrix is, in general, not a Toeplitz matrix itself. The main contribution of this work is an algorithm of quadratic complexity for the computation of the Toeplitz matrix exponential. It is based on the scaling and squaring framework, and connects classical results from rational approximation theory to matrices of low displacement rank. As an example, the developed methods are applied to Merton’s jump-diffusion model for option pricing.
MATHICSE Technical Report : Multiscale model reduction methods for flow in heterogeneous porous media
Creators: name: Abdulle, Assyr
name: Budác, Ondrej
Publisher: name: Écublens, MATHICSE
Year: 2019

description: In this paper we provide a general framework for model reduction methods applied to fluid flow in porous media. Using reduced basis and numerical homogenization techniques we show that the complexity of the numerical approximation of Stokes flow in heterogeneous media can be drastically reduced. The use of such acomputational framework is illustrated at several model problems such as two and three scale porous media.
Hilbert Schemes, Separated Variables, and D-Branes
Creators: name: Gorsky, A.
name: Nekrasov, N.
name: Rubtsov, V.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explain Sklyanin's separation of variables in geometrical terms and construct it for Hitchin and Mukai integrable systems. We construct Hilbert schemes of points on $T^{*}Σ$ for $Σ= {\IC}, {\IC}^{*}$ or elliptic curve, and on ${\bf C}^{2}/Γ$ and show that their complex deformations are integrable systems of Calogero-Sutherland-Moser type. We present the hyperkähler quotient constructions for Hilbert schemes of points on cotangent bundles to the higher genus curves, utilizing the results of Hurtubise, Kronheimer and Nakajima. Finally we discuss the connections to physics of $D$-branes and string duality.
description: harvmac, 27 pp. big mode; v2. typos and references corrected
title: 02_0406
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
How to Measure Chromo-magnetic Vacuum Background Field in $e^{+}e^{-}\to jets$, Hadron-Hadron and Nucleus-Nucleus Collisions
Creators: name: Czyż, W.
name: Turnau, J.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new type of the measurement which is sensitive to the QCD vacuum color-magnetic fluctuations: A measure of the axial assymetry of the hadronic final states produced in the high energy $e^{+}e^{-}$ collisions is related to the chromomagnetic vacuum field strength.
description: 11 pages,latex,no figures,replaced,final version which takes into account criticisms of referees of Phys.Rev. Title of the paper was changed. The formula (14) was corrected, notation in formulae (12) and (13) changed. Also we added forgotten vectorial notations,corrected misspellings and improved the style and grammar
MATHICSE Technical Report : Multiscale methods for wave problems in heterogeneous media
Creators: name: Abdulle, Assyr
name: Henning, Patrick
Publisher: name: Écublens, MATHICSE
Year: 2019

description: In this paper we give a survey on various multiscale methods for the numerical solution of second order hyperbolic equations in highly heterogenous media. We concentrate on the wave equation and distinguish between two classes of applications. First we discuss numerical methods for the wave equation in heterogeneous media without scale separation. Such a setting is for instance encountered in the geosciences, where natural structures often exhibit a continuum of different scales, that all need to be resolved numerically to get meaningful approximations. Approaches tailored for these settings typically involve the construction of generalized finite element spaces, where the basis functions incorporate information about the data variations. In the second part of the paper, we discuss numerical methods for the case of structured media with scale separation. This setting is for instance encountered in engineering sciences, where materials are often artificially designed. If this is the case, the structure and the scale separation can be explicitly exploited to compute appropriate homogenized/upscaled wave models that only exhibit a single coarse scaleand that can be hence solved at significantly reduced computational costs.
Search for Variable Stars in the Globular Cluster M3
Creators: name: Kaluzny, J.
name: Hilditch, R. W.
name: Clement, C.
name: Rucinski, S. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe here results of a photometric time-sequence survey of the globular cluster M3 (NGC 5272), in a search for contact and detached eclipsing binary stars. We have discovered only one likely eclipsing binary and one SX Phe type star in spite of monitoring 4077 stars with $V<20.0$ and observing 25 blue stragglers. The newly identified SX Phe star, V237, shows a light curve with a variable amplitude. Variable V238 shows variability either with a period of 0.49 d or with a period of 0.25 d. On the cluster colour-magnitude diagram, the variable occupies a position a few hundredths of magnitude to the blue of the base of the red giant branch. V238 is a likely descendent of a binary blue straggler. As a side result we obtained high quality data for 42 of the previously known RR Lyrae variables, including 33 of Bailey type ab, 7 type c and 2 double-mode pulsators. We used equations that relate the physical properties of RRc stars to their pulsation periods and Fourier parameters to derive masses, luminosities, temperatures and helium parameters for five of the RRc stars. One of the RRd stars (V79) has switched modes. In previous studies, it was classified as RRab, but our observations show that it is an RRd star with the first overtone mode dominating. This indicates blueward evolution on the horizontal branch.
description: 21 pages including 14 figures, Latex, requires mn.sty, psfig.sty. Submitted, MNRAS
MATHICSE Technical Report : On heterogeneous coupling of multiscale methods for problems with and without scale separation
Creators: name: Abdulle, Assyr
name: Jecker, Orane
Publisher: name: Écublens, MATHICSE
Year: 2019

description: In this paper we discuss partial differential equations with multiple scales for which scale resolution are needed in some subregions, while a separation of scale and numerical homogenization is possible in the remaining part of the computational domain. Departing from the classical coupling approach that often relies on artificial boundary conditions computed from some coarse grain simulation, we propose a coupling procedure in which virtual boundary conditions are obtained from the minimization of a coarse grain and a fine scale model in overlapping regions where both models are valid. We discuss this method with a focus on interface control and a numerical strategy based on non-matching meshes in the overlap. A fully discrete a priori error analysis of the heterogeneous coupled multiscale method is derived and numerical experiments that illustrate the efficiency and flexibility of the proposed strategy are presented.
Additional file 2: of Feasibility and acceptability of a proposed trial of acupuncture as an adjunct to lifestyle interventions for weight loss in Polycystic Ovary Syndrome: a qualitative study
Creators: name: Ee, Carolyn
name: Smith, Caroline
name: Costello, Michael
name: MacMillan, Freya
name: Moran, Lisa
name: Baylock, Brandi
name: Teede, Helena
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Focus group/interview question guide. Question guide used in focus groups/interviews. (PDF 48 kb)
PCB design files (Gerber) for double sided, FR4 board (MEA interface) and unclad G10 sheet (with holes which match PCB). CAD files (STL) of four designs of microscope adapters for MEA rings.
Creators: name: Phillips, Neil
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Microelectrodes
subject: microelectrode arrays

description: Microelectrode Arrays (MEAs) are essential in scientific and medical research for their capability to concurrently record electrical activity from multiple cells. However, the majority of commercial MEA systems filter out signals below 0.1 Hz, limiting their applicability for investigating low-frequency bioelectrical phenomena in organisms such as fungi, slime moulds, and synthetic cells. For example, the progression of bioelectrical states and low frequency oscillations related to maturation and development, as well as long term communication patterns. Recordings of long timescale biological activity are also limited by high minimum sample rates (e.g. 1 kHz) that result in large data sizes in recordings with durations of days to weeks. To address these constraints, we propose an innovative interface between MEAs and voltage data loggers, such as the Pico ADC-24. This development expands the utility of MEAs, enabling researchers to investigate a broader range of biological phenomena.
Spin-related phenomena in two-dimensional hopping regime in magnetic field
Creators: name: Shumilin, A. V.
name: Smirnov, D. S.
name: Golub, L. E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The spin relaxation time of localized charge carriers is few orders of magnitude larger than that of free electrons and holes. Therefore mutual conversion of spin polarization, charge current and spin current turns out to be underlined in the hopping conductivity regime. We reveal different regimes of the coupled spin and charge dynamics depending on the relation between spin relaxation time and the characteristic hopping time. We derive kinetic equations to describe electrical spin orientation, dc spin-Hall effect, and spin galvanic effect in the transverse magnetic field. The generalized macroscopic conductivities describing these effects are calculated using percolation theory supported by numerical simulation. The conductivities change the sign at least once as functions of magnetic field for all values of the spin relaxation time.
description: 15 pages, 6 figures
MATHICSE Technical Report : Perturbation of higher-order singular values
Creators: name: Hackbusch, Wolfgang
name: Kressner, Daniel
name: Uschmajew, André
Publisher: name: Écublens, MATHICSE
Year: 2019

description: The higher-order singular values for a tensor of order d are defined as the singular values of the d different matricizations associated with the multilinear rank. When d≥3, the singular values are generally different for different matricizations but not completely independent. Characterizing the set of feasible singular values turns out to be difficult. In this work, we contribute to this question by investigating which first-order perturbations of the singular values for a given tensor are possible. We prove that, except for trivial restrictions, any perturbation of the singular values can be achieved for almost every tensor with identical mode sizes.This settles a conjecture from [Hackbusch and Uschmajew, 2016] for the case of identical mode sizes. Our theoretical results are used to develop and analyze a variant of the Newton method for constructing a tensor with specified higher-order singular values or, more generally, with specified Gramians for the matricizations. We establish local quadratic convergence and demonstrate the robust convergence behavior with numerical experiments.
Diagonalization of the strongly coupled lattice QCD Hamiltonian
Creators: name: Umino, Yasuo
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We construct a solution to the equation of motion of Hamiltonian lattice QCD in the strong coupling limit using Wilson fermions which exactly diagonalizes the Hamiltonian to second order in the field operators. This solution obeys the free lattice Dirac equation with a dynamical mass which is identified with the gap. The equation determining this gap is derived and it is found that the dynamical quark mass is a constant to lowest order in N_c but becomes momentum dependent once 1/N_c corrections are taken into account. We interpret our solution within the framework of the N-quantum approach to quantum field theory and discuss how our formalism may be systematically extended to study bound states at finite temperature and chemical potential.
description: 14 pages, 2 figures
MATHICSE Technical Report : Multiscale methods and model order reduction for flow problems in three-scale porous media
Creators: name: Abdulle, Assyr
name: Budác, Ondrej
name: Imboden, Antoine
Publisher: name: Écublens, MATHICSE
Year: 2019

description: A new multiscale method combined with model order reduction is proposed for flow problems in three-scale porous media. We derive an effective three-scale model that couples a macroscopic Darcy equation, a mesoscopic Stokes-Brinkman equation, and a microscopic Stokes equation. A corresponding three-scale numerical method is then derived using the finite element discretization with numerical quadrature, where the macroscopic and mesoscopic permeability is upscaled at quadrature points from mesoscopic and microscopic problems, respectively. The computational cost of solving numerous mesoscopic and microscopic flow problems is further reduced by applying a Petrov–Galerkin reduced basis method at the mesocopic and microscopic scales. As there is nonatural way to obtain an affine decomposition of the mesoscopic problems, which is instrumental for the efficiency of the model order reduction, we derive a mesoscopic solver that makes use of empirical interpolation techniques. A priori and a posteriori error estimates are derived for the new method that is also tested numerically to corroborate the theoretical convergence rates and illustrate its efficiency.
Microscopics of Rotating Black Holes: Entropy and Greybody Factors
Creators: name: Cvetic, Mirjam
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the status of microscopic counting of rotating black hole degrees of freedom. We present two complementary approaches which both utilize the near-horizon geometry and precisely reproduce the Bekenstein Hawking entropy for near-extreme rotating black holes in D=4 and D=5. The first one, proposed by Strominger, is applicable for the Ramond-Ramond sector and relies on the correspondence between the near-horizon geometry and the conformal field theory on its boundary. The second one (somewhat more heuristic), employs the conformal sigma-model in the Neveu-Schwarz-Neveu-Schwarz sector and accounts for the black hole microstates by counting the small scale oscillations of the dyonic string there. We also present the wave equation for the minimally coupled scalars for such rotating black hole background, and discuss its implication for the greybody factors. The results are illustrated for the prototype D=5 rotating black hole.
description: 20 pages, RevTeX, Based on talks given at PASCOS '98, Strings '98, and Buckow '98
MATHICSE Technical Report : Fast computation of spectral projectors of banded matrices
Creators: name: Kressner, Daniel
name: Susnjara, Ana
Publisher: name: Écublens, MATHICSE
Year: 2019

description: We consider the approximate computation of spectral projectors for symmetric banded matrices. While this problem has received considerable attention, especially in the context of linear scaling electronic structure methods, the presence of small relative spectral gaps challenges existing methods based on approximate sparsity. In this work, we show how a data-sparse approximation based on hierarchical matrices can be used to overcome this problem. We prove a priori bounds on the approximation error and propose a fast algo-rithm based on the QDWH algorithm, along the works by Nakatsukasa et al. Numerical experiments demonstrate that the performance of our algorithm is robust with respect to the spectral gap. A preliminary MATLAB implementation becomes faster than eig already for matrix sizes of a few thousand.
title: Cascade enzymatic synthesis of a statin side chain precursor – the role of reaction engineering in process optimization
Creators: name: Sudar, Martina
name: Milčić, Nevena
name: Česnik Katulić, Morana
name: Szekrenyi, Anna
name: Hernández, Karel
name: Fekete, Melinda
name: Wardenga, Rainer
name: Majerić Elenkov, Maja
name: Qi, Yuyin
name: Charnock, Simon
name: Vasić-Rački, Đurđa
name: Fessner, Wolf-Dieter
name: Clapés, Pere
name: Findrik Blažević, Zvjezdana
Publisher: name: The Royal Society of Chemistry
Year: 2025

description: Statins are an important class of drugs used to lower blood cholesterol levels and are often used to combat cardiovascular disease. In view of the importance of safe and reliable supply and production of statins in modern medicine and the global need for sustainable processes, various biocatalytic strategies for their synthesis have been investigated. In this work, a novel biocatalytic route to a statin side chain precursor was investigated in a one-pot cascade reaction starting from the protected alcohol N-(3-hydroxypropyl)-2-phenylacetamide, which is oxidized to the corresponding aldehyde in the first reaction step, and then reacts with two equivalents of acetaldehyde to form the final product N-(2-((2S,4S,6S)-4,6-dihydroxytetrahydro-2H-pyran-2-yl)ethyl)-2-phenylacetamide (phenylacetamide-lactol). To study this complex reaction, an enzyme reaction engineering approach was used, i.e. the kinetics of all reactions occurring in the cascade (including side reactions) were determined. The obtained kinetic model together with the simulations gave an insight into the system and indicated the best reactor mode for the studied reaction, which was fed-batch with acetaldehyde feed to minimize its negative effect on the enzyme activity during the reaction. The mathematical model of the process was developed and used to simulate different scenarios and to find the reaction conditions (enzyme and coenzyme concentration, substrate feed concentration and flow rate) at which the highest yield of phenylacetamide-lactol (75%) can be obtained. In the end, our goal was to show that this novel cascade route is an interesting alternative for the synthesis of the statin side chain precursor and that is why we also calculated an initial estimate of the potential value addition.
Additional file 13: of Dissection of the molecular bases of genotype x environment interactions: a study of phenotypic plasticity of Saccharomyces cerevisiae in grape juices
Creators: name: Peltier, Emilien
name: Sharma, Vikas
name: Raga, Maria Martí
name: Roncoroni, Miguel
name: Bernard, Margaux
name: Jiranek, Vladimir
name: Gibon, Yves
name: Marullo, Philippe
Publisher: name: figshare
Year: 2018
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: 60506 Virology

description: Figure S6. Variance explained by QTL according to cross. Each dot represent a QTL. Bigger points indicate average. There is no significant difference between the two cross (Wilcoxon test pval > 0,05). (PDF 721 kb)
MATHICSE Technical Report : Multi space reduced basis preconditioners for large-scale parametrized PDEs
Creators: name: Dal Santo, Niccolò
name: Deparis, Simone
name: Manzoni, Andrea
name: Quarteroni, Alfio
Publisher: name: Écublens, MATHICSE
Year: 2019

description: In this work we introduce a new two-level preconditioner for the efficient solution of large scale linear systems arising from the discretization of parametrized PDEs. The proposed preconditioner combines in a multiplicative way a reduced basis solver, which plays the role of coarse component, and a "traditional" fine grid preconditioner, such as one-level Additive Schwarz, block Gauss-Seidel or block Jacobi preconditioners. The coarse component is built up on a new Multi Space Reduced Basis (MSRB) method that we introduce for the first time in this paper, where are reduced basis space is built through the proper orthogonal decomposition (POD) algorithm at each step of the iterative method at hand, like the flexible GMRES method. MSRB strategy consists in building reduced basis (RB) spaces that are well-suited to perform a single iteration, by addressing the error components which have not been treated yet. The Krylov iterations employed to solve the resulting preconditioned system targets small tolerances with a very small iteration count and in a very short time, showing good optimality and scalability properties. Simulations are carried out to evaluate the performance of the proposed preconditioner indifferent large scale computational settings related to parametrized advection diffusion equations and compared with the current state of the art algebraic multigrid preconditioners.
Branes at Generalized Conifolds and Toric Geometry
Creators: name: von Unge, Rikard
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use toric geometry to investigate the recently proposed relation between a set of D3 branes at a generalized conifold singularity and type IIA configurations of D4 branes stretched between a number of relatively rotated NS5 branes. In particular we investigate how various resolutions of the singularity corresponds to moving the NS branes and how Seiberg's duality is realized when two relatively rotated NS-branes are interchanged.
description: 19 pages, 8 figures; v2: references added, clarifying footnote on Seiberg's duality added
ПРОЧНОСТЬ И ДЕФОРМАЦИИ ПРЕДВАРИТЕЛЬНО ОБЖАТОГО ТЯЖЕЛОГО БЕТОНА ПРИ ВОЗДЕЙСТВИИ ДИНАМИЧЕСКИХ НАГРУЗКАХ
Creators: name: Шаумаров, Н.Б.
name: Абдуллаев, У.Х.
Publisher: name: Zenodo
Year: 2024

description: В работе изучалась прочность тяжелого и легких бетонов при однократных динамических нагрузках, и в частности, таких, какие могут быть при сейсмическом воздействии.
Deep photometric study of the region of the gamma-ray burst localization of June 13, 1979
Creators: name: Sokolov, V. V.
name: Kurt, V. G.
name: Zharikov, S. V.
name: Kopylov, A. I.
name: Berezin, A. V.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the framework of the hypothesis on potential sources of some gamma-ray bursts being single compact objects of neutron star type with finite surface temperature in the vicinity of the Sun a method of search in the optical range for a corresponding candidate in the region of a powerful short burst localization is considered. The localization region of the GRB790613 event is studied in the B, V and R filters. B-V and V-R colors of 196 objects with a S/N > 4 are measured up to the average practical photometric limit B < 25.7, V < 25.7 and R < 25.6 for the whole obtained mosaic of CCD images. No blue objects with B-V < 0 and V-R <0 were found up to B \approx 25.2, which can be interpreted as the absence of a compact object with a temperature > 1.5 10^{5}, K in this direction up to a distance \approx 40, pc. A probable common upper limit to the temperature of the supposed compact objects in the vicinity of the Sun is indicated based on the accumulated optical and X--ray data. The study of blue (B-V < 0) objects in the smallest (in the northern sky) gamma-ray box GRB790613, in view of the results of the search for point-like sources in the soft X--ray in the localization regions of bright gamma-ray bursts, does not exclude the existence of such ``cold'' (<= 10^{5} K) objects, which could give an essential contribution to the observed density of hidden matter close to the Sun and some of them could be related with the closest sources of gamma-ray bursts. Several interesting objects were also found in (or near) the localization region of the GRB790613 event.
description: 11 pages, 8 Postscript figures, Latex, sao2.sty and psfig.sty included
MODELING OF FLOW FIELD, INCLUSION REMOVAL, ARC HEATING AND HOT METAL DESULFURIZATION IN THE GAS STIRRED LADLE
Creators: name: Guo, Xipeng
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 490302
subject: Numerical analysis
classificationCode: 401404
subject: Industrial engineering

description: As demand for high-quality steel remains strong, optimizing ladle operations is crucial for efficiency in steelmaking. The ladle facilitates key processes such as homogenization, inclusion removal, degassing, and desulfurization. However, its complex multiphase nature—characterized by turbulence, high temperatures, and chemical reactions—makes direct observation challenging. This research develops Computational Fluid Dynamics (CFD) models to analyze and optimize ladle processes.The study presents four key models: (1) flow field and bubble distribution, (2) heat transfer and arc heating, (3) inclusion removal, and (4) hot metal desulfurization. The flow model simulates gas-stirred turbulence, validating velocity trends and slag eye size. The heat transfer model analyzes temperature distribution and slag behavior. The inclusion removal model examines bubble-inclusion interactions, while the desulfurization model assesses reagent efficiency.This research provides validated CFD models to optimize ladle performance, offering insights into flow dynamics, heat transfer, inclusion behavior, and chemical reactions, ultimately improving steel production efficiency.
MATHICSE Technical Report : An optimization-based numerical method for diffusion problems with sign-changing coefficients
Creators: name: Abdulle, Assyr
name: Huber, Martin Ernst
name: Lemaire, Simon
Publisher: name: Écublens, MATHICSE
Year: 2019

description: A new optimization-based numerical method is proposed for the solution of diffusion problems with sign-changing conductivity coefficients. In contrast to existing approaches, our method does not rely on the discretization of a stabilized equation and the convergence of the scheme can be proved without any symmetry assumption on the mesh near the interface where the conductivity sign changes.
Testing Lorentz- and CPT-invariance with ultracold neutrons
Creators: name: Martín-Ruiz, A.
name: Escobar, C. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we investigate, within the standard model extension framework, the influence of Lorentz- and CPT-violating terms on gravitational quantum states of ultracold neutrons. Using a semiclassical wave packet, we derive the effective nonrelativistic Hamiltonian which describes the neutrons vertical motion by averaging the contributions from the perpendicular coordinates to the free falling axis. We compute the physical implications of the Lorentz- and CPT-violating terms on the spectra. The comparison of our results with those obtained in the GRANIT experiment leads to an upper bound for the symmetries-violation $c_{μν} ^{n}$ coefficients. We find that ultracold neutrons are sensitive to the $a _{i} ^{n}$ and $e _{i} ^{n}$ coefficients, which thus far are unbounded by experiments in the neutron sector. We propose two additional problems involving ultracold neutrons which could be relevant for improving our current bounds; namely, gravity-resonance-spectroscopy and neutron whispering gallery wave.
MATHICSE Technical Report : Numerical homogenization and model order reduction for multiscale inverse problems
Creators: name: Abdulle, Assyr
name: Di Blasio, Andrea
Publisher: name: Écublens, MATHICSE
Year: 2019

description: A new numerical method based on numerical homogenization and model order reduction is introduced for the solution of multiscale inverse problems. We consider a class of elliptic problems with highly oscillatory tensors that varies on a microscopic scale. We assume that the micro structure is known and seek to recover a macroscopic scalar parametrization of the microscaletensor (e.g.volume fraction). Departing from the full fine scale model that would require meshre solution for the forward problem down to the finest scale, we solve the inverse problem for a coarse model obtained by numerical homogenization. The input data, i.e., measurement from the Dirichlet to Neumann map, are solely based on the original fine scale model. Furthermore, reduced basis techniques are used to avoid computing effective coefficients for the forward solver at each integration point of the macroscopic mesh. Uniqueness and stability of the effective inverse problem is established based on standard assumptions for the fine scale model and a link with this latter model is established by means of G-convergence. A priori error estimates are established for our method. Numerical experiments illustrate the efficiency of the proposed scheme and confirm our theoretical finding.
Chemical evolution of the gas in C-type shocks in dark clouds
Creators: name: Nesterenok, A. V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A magnetohydrodynamic model of a steady, transverse C-type shock in a dense molecular cloud is presented. A complete gas-grain chemical network is taken into account: the gas-phase chemistry, the adsorption of gas species on dust grains, various desorption mechanisms, the grain surface chemistry, the ion neutralization on dust grains, the sputtering of grain mantles. The population densities of energy levels of ions CI, CII and OI and molecules H$_2$, CO, H$_2$O are computed in parallel with the dynamical and chemical rate equations. The large velocity gradient approximation is used in the line radiative transfer calculations. The simulations consist of two steps: (i) modelling of the chemical and thermal evolution of a static molecular cloud and (ii) shock simulations. A comparison is made with the results of publicly available models of similar physical systems. The focus of the paper is on the chemical processing of gas material and ice mantles of dust grains by the shock. Sputtering of ice mantles takes place in the shock region close to the temperature peak of the neutral gas. At high shock speeds, molecules ejected from ice mantles are effectively destroyed in hot gas, and their survival time is low - of the order of dozens of years. After a passage of high-speed C-type shock, a zone of high abundance of atomic hydrogen appears in the cooling postshock gas that triggers formation of complex organic species such as methanol. It is shown that abundances of some complex organic molecules (COMs) in the postshock region can be much higher than in the preshock gas. These results are important for interpretation of observations of COMs in protostellar outflows.
description: accepted for publication in Astrophysics and Space Science, 37 pages, 5 figures
MATHICSE Technical Report : A reduced basis approach to large-scale pseudospectra computation
Creators: name: Sirkovic, Petar
Publisher: name: Écublens, MATHICSE
Year: 2019

description: For studying spectral properties of a non-normal matrix A ∈ Cn×n, information about its spectrum σ(A) alone is usually not enough. Effects of perturbations on σ(A) can be studied by computing ε-pseudospectra, that is the level-sets of the resolvent norm function g(z) = ‖(zI − A)−1‖2. The computation of ε-pseudospectra requires determining the smallest singular values σmin(zI − A) on for all z on a portion of the complex plane. In this work, we propose a reduced basis approach to pseudospectra computation that provides highly accurate estimates of pseudospectra in the region of interest. It incorporates the sampled singular vectors of zI − A for different values of z and implicitly exploits their smoothness properties. It provides rigorous upper and lower bounds for the pseudospectra in the region of interest. We also present a comparison of our approach to several existing approaches on a number of numerical examples, showing that our approach provides significant improvement in terms of computational time.
Radial Flow and Differential Freeze-out in Proton-Proton Collisions at $\sqrt{s}= 7$ TeV at the LHC
Creators: name: Khuntia, Arvind
name: Sharma, Himanshu
name: Tiwari, Swatantra Kumar
name: Sahoo, Raghunath
name: Cleymans, Jean
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyse the transverse momentum ($p_{\rm T}$)-spectra as a function of charged-particle multiplicity at midrapidity ($|y| < 0.5$) for various identified particles such as $π^{\pm}$, $K^{\pm}$, $K_S^0$, $p+\overline{p}$, $ϕ$, $K^{*0} + \overline {K^{*0}}$, and $Λ$ + $\barΛ$ in proton-proton collisions at $\sqrt{s}$ = 7 TeV using Boltzmann-Gibbs Blast Wave (BGBW) model and thermodynamically consistent Tsallis distribution function. We obtain the multiplicity dependent kinetic freeze-out temperature ($T_{\rm kin}$) and radial flow ($β$) of various particles after fitting the $p_{\rm T}$-distribution with BGBW model. Here, $T_{\rm kin}$ exhibits mild dependence on multiplicity class while $β$ shows almost independent behaviour. The information regarding Tsallis temperature and the non-extensivity parameter ($q$) are drawn by fitting the $p_{\rm T}$-spectra with Tsallis distribution function. The extracted parameters of these particles are studied as a function of charged particle multiplicity density ($dN_{ch}/dη$). In addition to this, we also study these parameters as a function of particle mass to observe any possible mass ordering. All the identified hadrons show a mass ordering in temperature, non-extensive parameter and also a strong dependence on multiplicity classes, except the lighter particles. It is observed that as the particle multiplicity increases, the $q$-parameter approaches to Boltzmann-Gibbs value, hence a conclusion can be drawn that system tends to thermal equilibrium. The observations are consistent with a differential freeze-out scenario of the produced particles.
description: Published version
Calculation of Heat-Kernel Coefficients and Usage of Computer Algebra
Creators: name: Bel'kov, A. A.
name: Lanyov, A. V.
name: Schaale, A.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The calculation of heat-kernel coefficients with the classical DeWitt algorithm has been discussed. We present the explicit form of the coefficients up to $h_5$ in the general case and up to $h_7^{min}$ for the minimal parts. The results are compared with the expressions in other papers. A method to optimize the usage of memory for working with large expressions on universal computer algebra systems has been proposed.
description: 12 pages, LaTeX, no figures. Extended version of contribution to AIHENP'95, Pisa, April 3-8, 1995
title: 01_2291
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
L'accesso alle pubblicazioni: tutto quello che avreste voluto sapere e non avete mai osato chiedere
Creators: name: Sabatini, Lia
Publisher: name: INFN Open Access Repository
Year: 2025
Subjects: Corso Formazione Nazionale, accesso, riviste elettroniche, contratti trasformativi,

description: Corso di formazione nazionale: Scienza Aperta INFN
Maximally Algebraic potentially irrational Cubic Fourfolds
Creators: name: Laza, Radu
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: A well known conjecture asserts that a cubic fourfold $X$ whose transcendental cohomology $T_X$ can not be realized as the transcendental cohomology of a $K3$ surface is irrational. Since the geometry of cubic fourfolds is intricately related to the existence of algebraic $2$-cycles on them, it is natural to ask for the most algebraic cubic fourfolds $X$ to which this conjecture is still applicable. In this paper, we show that for an appropriate `algebraicity index' $κ_X$, there exists a unique class of cubics maximizing $κ_X$, not having an associated $K3$ surface; namely, the cubic fourfolds with an Eckardt point (previously investigated in [LPZ17]). Arguably, they are the most algebraic potentially irrational cubic fourfolds, and thus a good testing ground for the Harris, Hassett, Kuznetsov conjectures.
description: comments welcome; 7 pages
Topology in the Bulk: Gauge Field Solitons in Extra Dimensions
Creators: name: Hill, Christopher T.
name: Ramond, Pierre
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Certain static soliton configurations of gauge fields in 4+1 dimensions correspond to the instanton in 4-Euclidean dimensions ``turned on its side,'' becoming a monopole in 4+1. The periodic instanton solution can be used with the method of images to construct solutions satisfying D-brane boundary conditions. The $θ$-term on the brane becomes a topological current source, yielding an emission amplitude for monopoles into the bulk. Instantons have a novel reinterpretation in terms of monopole exchange between branes.
description: 23 pages, 4 figures