cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ensemble Reversible Data Hiding
Creators: name: Wu, Hanzhou
name: Wang, Wei
name: Dong, Jing
name: Wang, Hongxia
Publisher: name: arXiv
Year: 2018
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: The conventional reversible data hiding (RDH) algorithms often consider the host as a whole to embed a secret payload. In order to achieve satisfactory rate-distortion performance, the secret bits are embedded into the noise-like component of the host such as prediction errors. From the rate-distortion optimization view, it may be not optimal since the data embedding units use the identical parameters. This motivates us to present a segmented data embedding strategy for efficient RDH in this paper, in which the raw host could be partitioned into multiple subhosts such that each one can freely optimize and use the data embedding parameters. Moreover, it enables us to apply different RDH algorithms within different subhosts, which is defined as ensemble. Notice that, the ensemble defined here is different from that in machine learning. Accordingly, the conventional operation corresponds to a special case of the proposed work. Since it is a general strategy, we combine some state-of-the-art algorithms to construct a new system using the proposed embedding strategy to evaluate the rate-distortion performance. Experimental results have shown that, the ensemble RDH system could outperform the original versions in most cases, which has shown the superiority and applicability.
description: Fig. 1 was updated due to a minor error
Pierre Sonigo
Creators: name: Leibowitch, Jacques (1942-2020)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Pièce jointe : En PROLOGUE à la THERAPEUTIQUE ANTI VIH SIDA : QUELS DOMMAGES REPARER … : CEUX QUE LE VIRUS INFLIGE …SANS DOUTE… : MAIS LESQUELS ?" .
description: 1 fichier (15 pages). Autres destinataires : Dominique Mathez, Jean-Claude Melchior, Philippe Poussier.
Bayesian Fused Lasso regression for dynamic binary networks
Creators: name: Betancourt, Brenda
name: Rodríguez, Abel
name: Boyd, Naomi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: We propose a multinomial logistic regression model for link prediction in a time series of directed binary networks. To account for the dynamic nature of the data we employ a dynamic model for the model parameters that is strongly connected with the fused lasso penalty. In addition to promoting sparseness, this prior allows us to explore the presence of change points in the structure of the network. We introduce fast computational algorithms for estimation and prediction using both optimization and Bayesian approaches. The performance of the model is illustrated using simulated data and data from a financial trading network in the NYMEX natural gas futures market. Supplementary material containing the trading network data set and code to implement the algorithms is available online.
TPS : a theorem proving system for classical type theory
Creators: name: P. B.(Peter Bruce) Andrews
Publisher: name: Carnegie Mellon University
Year: 1995
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "This is a description of TPS, a theorem proving system for classical type theory (Church's typed [lambda]-calculus). TPS has been designed to be a general research tool for manipulating wffs of first- and higher-order logic, and searching for proofs of such wffs interactively or automatically, or in a combination of these modes. An important feature of TPS is the ability to translate between expansion proofs and natural deduction proofs. Examples of theorems which TPS can prove completely automatically are given to illustrate certain aspects of TPS's behavior and problems of theorem proving in higher-order logic."
The SOFIA Telescope
Creators: name: Krabbe, Alfred
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The SOFIA telescope as the heart of the observatory is a major technological challenge. I present an overview on the astro-nomical and scientific requirements for such a big airborne observatory and demonstrate the impact of these requirements on the layout of SOFIA, in particular on the telescope design as it is now. Selected components of the telescope will be de-scribed in their context and functionality. The current status of the telescope is presented.
description: 6 pages, 7 figures, to appear in: Proceedings of SPIE: Airborne Telescope Systems, Munich, March 2000, Vol. 4014, paper with high resolution figures available at http://astro1.ws.ba.dlr.de/WEBPAGES/paper.htm
THE FEMALE ORGASM: SEX AND SEXUAL ORIENTATION EFFECTS ON AROUSAL, ORGASM, AND SEXUAL SATISFACTION
Creators: name: Grider, Kaylee
Publisher: name: Zenodo
Year: 2021
Subjects: female orgasm
sexual satisfaction
non-heterosexual
pair-bonding hypothesis

description: In this study, we investigate the patterns of sexual functioning and sexual response across biological sex and sexual orientation to shed light on the question of the possible adaptive function of human female orgasm. Three broad hypotheses have been proposed to account for human female orgasm: 1) the byproduct hypothesis, 2) the sperm selection hypothesis, and 3) the pair-bonding hypothesis. We suggest that researchers may be able to distinguish between these hypothesized functions (or lack thereof) by evaluating the patterns of similarity and difference in sexual response among men engaging in sexual activity with women (the only group for whom male ejaculation is hypothesized to serve a function), women engaging in sexual activity with men (the only group for whom a sperm selection function of female orgasm applies), and women engaging in sexual activity with other women (for whom a pair-bonding function of female orgasm is likely equally relevant as it would be for women engaging in sexual activity with men). Sexual response patterns from men engaging in sexual activity with men are also examined to assess the possible impact of sexual orientation on the expression of traits evolved specifically for fertilization. Data was collected using an online survey to measure sensitivity to sexual excitation and sexual inhibition factors, sexual history, sexual response patterns, and partner qualities in a sample of men and women identifying across the sexual orientation spectrum. Results indicate that female orgasm is predicted by different factors than male orgasm, but that the predictors of female orgasm are similar across sexual orientation, suggesting possible support for the pair-bonding hypothesis.
Synthetic space with arbitrary dimensions in a few rings undergoing dynamic modulation
Creators: name: Yuan, Luqi
name: Xiao, Meng
name: Lin, Qian
name: Fan, Shanhui
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We show that a single ring resonator undergoing dynamic modulation can be used to create a synthetic space with an arbitrary dimension. In such a system the phases of the modulation can be used to create a photonic gauge potential in high dimensions. As an illustration of the implication of this concept, we show that the Haldane model, which exhibits non-trivial topology in two dimensions, can be implemented in the synthetic space using three rings. Our results point to a route towards exploring higher-dimensional topological physics in low-dimensional physical structures. The dynamics of photons in such synthetic spaces also provides a mechanism to control the spectrum of light.
The partition of energy for air-fluidized grains
Creators: name: Abate, A. R.
name: Durian, D. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The dynamics of one and two identical spheres rolling in a nearly-levitating upflow of air obey the Langevin Equation and the Fluctuation-Dissipation Relation [Ojha et al. Nature 427, 521 (2004) and Phys. Rev. E 71, 01631 (2005)]. To probe the range of validity of this statistical mechanical description, we perturb the original experiments in four ways. First, we break the circular symmetry of the confining potential by using a stadium-shaped trap, and find that the velocity distributions remain circularly symmetric. Second, we fluidize multiple spheres of different density, and find that all have the same effective temperature. Third, we fluidize two spheres of different size, and find that the thermal analogy progressively fails according to the size ratio. Fourth, we fluidize individual grains of aspherical shape, and find that the applicability of statistical mechanics depends on whether or not the grain chatters along its length, in the direction of airflow.
description: experiment
TPS : a theorem proving system for classical type theory
Creators: name: P. B.(Peter Bruce) Andrews
Publisher: name: Carnegie Mellon University
Year: 1994
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "This is a description of TPS, a theorem proving system for classical type theory (Church's typed [lambda]-calculus). TPS has been designed to be a general research tool for manipulating wffs of first- and higher-order logic, and searching for proofs of such wffs interactively or automatically, or in a combination of these modes. An important feature of TPS is the ability to translate between expansion proofs and natural deduction proofs. Examples of theorems which TPS can prove completely automatically are given to illustrate certain aspects of TPS's behavior and problems of theorem proving in higher-order logic."
An inverse electromagnetic scattering problem for a bi-periodic inhomogeneous layer on a perfectly conducting plate
Creators: name: Hu, Guanghui
name: Yang, Jiaqing
name: Zhang, Bo
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: Inverse electromagnetic scattering
subject: uniqueness
subject: periodic inhomogeneous layer
subject: Maxwell's equations
subject: 78A46
subject: 35R30
subject: 35B27
subject: 35Q61

description: This paper is concerned with uniqueness for reconstructing a periodic inhomogeneous medium covered on a perfectly conducting plate. We deal with the problem in the frame of time-harmonic Maxwell systems without TE or TM polarization. An orthogonal relation for two refractive indices is obtained, and then inspired by Kirsch's idea, the refractive index can be identified by utilizing the eigenvalues and eigenfunctions of a quasi-periodic Sturm-Liouville eigenvalue problem.
Additional file 1 of Genome wide analysis of kinesin gene family in Citrullus lanatus reveals an essential role in early fruit development
Creators: name: Tian, Shujuan
name: Jiang, Jiao
name: Xu, Guo-qi
name: Wang, Tan
name: Liu, Qiyan
name: Chen, Xiner
name: Liu, Man
name: Yuan, Li
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Phylogenetic tree of kinesin genes from C. lanatususing neighbor-joining method. Figure S2. Phylogenetic tree of kinesin genes from C. lanatusand and A. thaliana using neighbor-joining method. Figure S3. Phylogenetic tree of kinesin genes from C. lanatusand and S. lycopersicum using neighbor-joining method. Neighbor-joining phylogenetic tree of the kinesin family. The different kinesin subfamily was marked with different color, respectively. Figure S4. Comparative expression analysis of 5 ClKINsgenes in seed at different days after pollination by qRT-PCR. ClACTIN gene was used for normalization of quantitative RT-PCR results. The standard deviations of three biological replicates are represented by the error bars. Table S1. Kinesin gene family members identified in Citrullus lanatus. Table S2. The specific primers for qRT-PCR of 48 ClKINsgenes.
A numerical method for mass conservative coupling between fluid flow and solute transport
Creators: name: Fuhrmann, Jürgen
name: Langmach, Hartmut
name: Linke, Alexander
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: Incompressible Navier-Stokes Equations
subject: Convection-Diffusion Equation
subject: Finite Element Method
subject: Finite Volume Method
subject: Electrochemical Flow Cell
subject: Limiting Current
subject: 76V05
subject: 76D05
subject: 65N08
subject: 65N30
subject: 47.10.ad
subject: 47.11.Fg
subject: 47.11.Hj
subject: 82.20.Wt

description: We present a new coupled discretization approach for species transport in an incompressible fluid. The Navier-Stokes equations for the flow are discretized by the divergence-free Scott-Vogelius element on barycentrically refined meshes guaranteeing LBB stability. The convection-diffusion equation for species transport is discretized by the Voronoi finite volume method. In accordance to the continuous setting, due to the exact integration of the normal component of the flow through the Voronoi surfaces, the species concentration fulfills discrete global and local maximum principles. Besides of the the numerical scheme itself, we present important aspects of its implementation. Further, for the case of homogeneous Dirichlet boundary conditions, we give a convergence proof for the coupled scheme. We report results of the application of the scheme to the interpretation of limiting current measurements in an electrochemical flow cell with cylindrical shape.
title: Bayesian mark-recapture model for migrating fish populations: Ascent of Atlantic salmon (Salmo salar L.) in River Kymijoki and the effects of river discharge and recreational fishing
Creators: name: Antti-Poika, Veli-Pekka
name: Mäntyniemi, Samu
name: Kuikka, Sakari
Publisher: name: ASC 2007 - Theme session O
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.By creating a bayesian catch - and release probability model, we estimated the size of river Kymijoki ascending salmon population, and how it was affected by river discharge managed by stream regulation, recreational fishing in the river area and its estuary, and transportation of ascending adult fishes over Korkeakoski dam. Complex study problem and availability of paraller catch- and release - and catch-data give good precusitions for applying bayesian modelling in the study.
A note on models for anomalous phase-change processes
Creators: name: Ceretani, Andrea N.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We review some fractional free boundary problems that were recently considered for modeling anomalous phase-transitions. All problems are of Stefan type and involve fractional derivatives in time according to Caputo's definition. We survey the assumptions from which they are obtained and observe that the problems are nonequivalent though all of them reduce to a classical Stefan problem when the order of the fractional derivatives is replaced by one. We further show that a simple heuristic approach built upon a fractional version of the energy balance and the classical Fourier's law leads to a natural generalization of the classical Stefan problem in which time derivatives are replaced by fractional ones.
title: Management with sparse data
Creators: name: Skagen, Dankert W.
name: Dankel, Dorothy J.
Publisher: name: ASC 2007 - Theme session O
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.We consider a management that aims at controlling the removal from the stock, guided by a perception of the state of the stock derived from limited data that does not allow an ordinary analytic assessment. In simulation modeling, there is a 'real' stock and 'real' removals, and the stock develops according to these removals. The management part creates a feed back loop through a noisy link between the state of the true stock and the actual removals. The performance of the management will depend on how the real removal responds to the stock, and how the stock responds to the removals. Structurally, this is a quite simple feed-back system. The interior of the building blocks is complex and diverse, however, and include obstacles like time lags and stochastic terms. When an analytical assessment is not available, the link between the real stock and the management decisions is harder to understand and model, and it may be noisier. The main emphasis in this paper is finding decision rules that rely on sparse and noisy data. A simulation tool runs as a bootstrap and was made to cover a variety of stocks, decision rules and noise in a versatile way, but on a quite generic level. The link between state of the stock and the basis of the decision was modeled as SSB (or alternatively total stock biomass TSB) derived from the real stock numbers at age, but with random noise and a random year factor. Several types of harvest rules were explored, and pros and cons of various types are highlighted.
Three-body model calculations for 16C nucleus
Creators: name: Hagino, K.
name: Sagawa, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We apply a three-body model consisting of two valence neutrons and the core nucleus $^{14}$C in order to investigate the ground state properties and the electronic quadrupole transition of the $^{16}$C nucleus. The discretized continuum spectrum within a large box is taken into account by using a single-particle basis obtained from a Woods-Saxon potential. The calculated B(E2) value from the first 2$^+$ state to the ground state shows good agreement with the observed data with the core polarization charge which reproduces the experimental B(E2) value for $^{15}$C. We also show that the present calculation well accounts for the longitudinal momentum distribution of $^{15}$C fragment from the breakup of $^{16}$C nucleus. We point out that the dominant ($d_{5/2})^2$ configuration in the ground state of $^{16}$C plays a crucial role for these agreement.
description: 5 pages, 3 figures, 3 tables
title: ADCO, Grènetier de Cîteaux : comptes (1497-1504) (11 H 1172), f. 00264
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1497-1504), Archives départementales de la Côte-d'Or, (11 H 1172), f. 00264, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
The role of reactive reaction intermediates in two-step heterogeneous electro-catalytic reactions: A model study
Creators: name: Fuhrmann, Jürgen
name: Zhao, Hong
name: Langmach, Hartmut
name: Seidel, Yvonne E.
name: Jusys, Zenonas
name: Behm, Rolf J.
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: Finite Volume Method
subject: Electrocatalysis
subject: 35K20
subject: 65N99

description: Experimental investigations of heterogeneous electrocatalytic reactions have been performed in flow cells which provide an environment with controlled parameters. Measurements of the oxygen reduction reaction in a flow cell with an electrode consisting of an array of Pt nanodisks on a glassy carbon substrate exhibited a decreasing fraction of the intermediate $H_2O_2$ in the overall reaction products with increasing density of the nanodiscs. A similar result is true for the dependence on the catalyst loading in the case of a supported Pt/C catalyst thin-film electrode, where the fraction of the intermediate decreases with increasing catalyst loading. Similar effects have been detected for the methanol oxidation. We present a model of multistep heterogeneous electrocatalytic oxidation and reduction reactions based on an adsorption-reaction-desorption scheme using the Langmuir assumption and macroscopic transport equations. A continuum based model problem in a vertical cross section of a rectangular flow cell is proposed in order to explain basic principles of the experimental situation. It includes three model species A, B, C, which undergo adsorption and desorption at a catalyst surface, as well as adsorbate reactions from A to B to C. These surface reactions are coupled with diffusion and advection in the Hagen Poiseuille flow in the flow chamber of the cell. Both high velocity asymptotic theory and a finite volume numerical are used to obtain approximate solutions to the model. Both approaches show a behaviour similar to the experimentally observed. Working in more general situations, the finite volume scheme was applied to a catalyst layer consisting of a number of small catalytically active areas corresponding to nanodisks. Good qualitative agreement with the experimental findings was established for this case as well.
On the Lagrangian branched transport model and the equivalence with its Eulerian formulation
Creators: name: Pegon, Paul
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: First we present two classical models of Branched Transport: the Lagrangian model introduced by Bernot, Caselles, Morel, Maddalena, Solimini, and the Eulerian model introduced by Xia. An emphasis is put on the Lagrangian model, for which we give a complete proof of existence of minimizers in a --hopefully-- simplified manner. We also treat in detail some $σ$-finiteness and rectifiability issues to yield rigorously the energy formula connecting the irrigation cost I$α$ to the Gilbert Energy E$α$. Our main purpose is to use this energy formula and exploit a Smirnov decomposition of vector flows, which was proved via the Dacorogna-Moser approach by Santambrogio, to establish the equivalence between the Lagrangian and Eulerian models.
The effects of specialization on research careers
Creators: name: Robinson-Garcia, N
name: Costas, R
name: Sugimoto, CR
name: Larivière, V
name: Nane, T
Publisher: name: Zenodo
Year: 2019
Subjects: scientometrics
science of science
individual assessment
research evaluation
women in science

description: In this study we develop a model to predict the probability of performing specific contribution roles based on bibliometric data to identify the contribution of each author in this dataset for all publications in their research career. Based on these predictions we profile career trajectories. We use as a seed dataset, contribution data from 71,083 articles and reviews from PLOS journals published between 2006 and 2013 from Medical and Health Sciences. These contribution types are the following: 1) wrote the manuscript, 2) conceived the experiments, 3) performed the experiments, 4) analysed the data, 5) contributed with tools, 6) approved the final version, and 7) other. A total of 348,710 unique disambiguated authors are identified using an author name disambiguation algorithm (14). We consider the following bibliometric variables to predict contribution types: document type, author order, academic age (15) at the time of publication, total number of papers published at the time of publication, total number of author, total number of countries and total number of institutions authoring the publication. We employ a data-driven approach to construct a Bayesian network (16) which graphically represents the relation between the bibliometric and contribution variables and also entails the joint probability distribution that accounts for the existing dependencies between the model’s variables. Then we segregate our set of researchers by four career stages: junior (<5 years since first publication), early-career (≥5 to <15 years since first publication), mid-career (≥15 to 30 years since first publication) and late career (≥30 years since first publication). We then perform an archetypal analysis (17) at each stage to identify profiles of researchers based on their predicted contributorship.
THE IMPACT OF TEACHERS' PERCEPTIONS OF THEIR SELF-EFFICACY AND READINESS TO TEACH MATH IN AN INCLUSIVE CLASSROOM
Creators: name: Parr, Linda
Publisher: name: Zenodo
Year: 2021
Subjects: self-efficacy
readiness
special education
equity
inclusion

description: General education teachers face the challenge of creating a rigorous instructional program for an increasing number of students in their classes who qualify for special education services. This study explores the impact of the general education teachers’ self-efficacy and readiness on their instructional practice of teaching math to students who qualify for special education services. This qualitative study uses two interviews, a teacher survey, and math lesson plans to identify the levels of self-efficacy and readiness of four general education teachers and identify characteristics of instructional practices. Bandura’s Social Cognitive Theory serves as the framework for understanding the impact of self-efficacy and readiness. The findings reflect the complexity of self-efficacy and readiness and suggest that teachers are more willing to adjust their instructional practices to meet the unique learning needs of all students if their perceptions of self-efficacy and readiness are at high levels.
title: A regional computable general equilibrium model for fisheries: results of the EU PECHDEV project
Creators: name: Failler, Pierre
name: Pan, Haoran
name: Floros, Christos
name: Malvarosa, Loretta
name: Placenti, Vincenzo
name: Bernard, Pascal
name: Gascuel, Didier
name: Roth, Eva
name: Gallastegui, Carmen
name: Fernández, Javier
name: González, Pilar
name: Jorgensen, Henning P.
name: Clers, Sophie Des
name: Chassot, Emmanuel
Publisher: name: ASC 2007 - Theme session O
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.This paper presents 1-an application of the Computable General Equilibrium (CGE, hereafter) technique to fisheries using data from five EU regions: Bornholm (Denmark), Salerno (Italy), Cornwall (England), Finistère (France) and Pontevedra (Spain); 2-the biological production functions for these NUTS 31 EU regions (County in England, Département in France, Province in Italy and Spain, Municipality in Denmark) and ; and 3-some key ecological aspects to take into account when modelling fisheries. The data requirements for regional CGE and biological models are explained, and the process to be used to develop applied static CGE models for the fisheries sector is also presented. The main purpose of this paper is to present the use of a CGE model for policy and decision-making purposes by looking at the empirical relationship between fisheries and regional economics. For this, two policy scenarios are considered: (i) an increase in taxes, and (ii) a decrease in production quota. The Pechdev model offers some interesting conclusions that help us 1-to better understand fisheries economic modelling when considered as a separate sector in interaction with the rest of the economy; 2-to give inputs to the European Common Fishery Policy. The results of scenarios are limited to the economy as the link between economic and biological models has not been successfully set up for various reasons, particularly the data problems with the selected regions.
title: Manual Of Indicators And Methods For Assessingfish Stocks Using Only Fishery-Independent,Survey Based Information
Creators: name: Cotter, J.
Publisher: name: ASC 2007 - Theme session O
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.This manual discusses the use of indicators for assessing the state of a fish stock. The indicators envisaged are estimated from trawl surveys, or trawl-supplemented surveys such as egg and acoustic surveys, in which catchability is maintained constant so far as practically possible. A preliminary section considers factors that determine the appropriateness of a survey for each species and indicator, and makes suggestions for statistical estimators for quantitative and descriptive indicators. A widely applicable selection of biological and spatial indicators is then documented in a standardised format that includes references to examples of their use and modifications. The biological indicators include those relating to quantity of fish, size, and reproduction. The spatial indicators characterise the geographic distribution of a stock and make allowance for low or zero densities of fish at some stations. The final section of the manual presents several presentational and statistical methods for assessing and interpreting trends in indicators. A stock simulation model is described that may assist with determination of reference points for biological indicators. Since indicators tend to be highly specific and normally many would be used to assess the state of a stock, multivariate methods form an important part of this section. Indicators offer valuable biological and geographic information for supplementing existing model-based stock assessments. They are also likely to form an important component of an ecosystem approach to fishery management, or they could be used pragmatically to tune harvest control rules in a form of adaptive management.
Enhanced critical current density of YBa2Cu3Ox films grown on Nd1/3Eu1/3Gd1/3Ba2Cu3Ox with nano-undulated surface morphology
Creators: name: Meng, R. L.
name: Johansen, T. H.
name: Rusakova, I. A.
name: Baikalov, A.
name: Pham, D.
name: Chen, F.
name: Zuo, Z. Y.
name: Chu, C. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a simple and easily controllable method where a nano-undulated surface morphology of Nd1/3Eu1/3Gd1/3Ba2Cu3Ox (NEG) films leads to a substantial increase in the critical current density in superconducting YBa2Cu3Ox (YBCO) films deposited by pulsed laser deposition on such NEG layers. The enhancement is observed over a wide range of fields and temperatures. Transmission electron microscopy shows that such YBCO films possess a high density of localized areas, typically 20 x 20 nm2 in size, where distortion of atomic planes give rotational (2 to 5 degrees) moire patterns. Their distribution is random and uniform, and expected to be the origin of the enhanced flux pinning. Magneto-optical imaging shows that these films have excellent macroscopic magnetic uniformity.
description: 4 pages, 4 figures
A Six Vertex Model on a Fishnet
Creators: name: Thorn, Charles B.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The flow of U(1) charge through dense fishnet diagrams, in a non-hermitian matrix scalar field theory g_1Tr(Σ^\daggerΣ)^2 + 2g_1vTrΣ^{\dagger 2}Σ^2, is described by a 6-vertex model on a ``diamond'' lattice [1]. We give a direct calculation of the continuum properties of the 6-vertex model on this novel lattice, explicitly confirming the conclusions of [1], that, for 1/2 < v< \infty, they are identical to those of a world-sheet scalar field compactified on a circle S_1. The radius of the circle is related to the ratio v of quartic couplings by R^{-2} = 2T_0 arccos(1-1/2v^2). This direct computational approach may be of value in generalizing the conclusions to the non-Abelian O(n) case.
description: latex, 14 pages, 3 figures
Shell-model study of spectroscopies and isospin structures in odd-odd $N=Z$ nuclei employing realistic \emph{NN} potentials
Creators: name: Qi, C.
name: Xu, F. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The structures of odd-odd $N=Z$ nuclei in the lower \emph{fp} shell have been investigated with a new isospin-nonconserving microscopical interaction. The interaction is derived from a high-precision charge-dependent Bonn nucleon-nucleon potential using the folded-diagram renormalization method. Excellent agreements with experimental data have been obtained up to band terminations. Particularly, the relative positions of T=0 and T=1 bands were well reproduced. Calculations with another interaction obtained from the Idaho-A chiral potential showed similar results. Our calculations also give a good description of the existence of high-spin isomeric states in the $0f_{7/2}$ sub-shell. As examples, the spectroscopies and isospin structures of $^{46}$V and $^{50}$Mn have been discussed in detail, with the useful predictions of level structures including electromagnetic properties. Results for $^{50}$Mn were analyzed where experimental observations are still insufficient.
description: 19 pages, 6 figures
Friction and diffusion of matter-wave bright solitons
Creators: name: Sinha, Subhasis
name: Cherny, Alexander Yu.
name: Kovrizhin, Dmitry
name: Brand, Joachim
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider the motion of a matter-wave bright soliton under the influence of a cloud of thermal particles. In the ideal one-dimensional system, the scattering process of the quasiparticles with the soliton is reflectionless, however, the quasiparticles acquire a phase shift. In the realistic system of a Bose-Einstein condensate confined in a tight waveguide trap, the transverse degrees of freedom generate an extra but small nonlinearity in the system which gives rise to finite reflection and leads to dissipative motion of the soliton. We calculate the velocity and temperature-dependent frictional force and diffusion coefficient of a matter wave bright soliton immersed in a thermal cloud.
Skyrmions formation due to unconventional magnetic modes in anisotropic multi-band superconductors
Creators: name: Winyard, Thomas
name: Silaev, Mihail
name: Babaev, Egor
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Multiband superconductors have a sufficient number of degrees of freedom to allow topological excitations characterized by Skyrmionic topological invariants. In the most common, clean s-wave multiband, systems the interband magnetic coupling favours composite vortex solutions, without a Skyrmionic topological charge. It was discussed recently that certain kinds of anisotropies lead to hybridisation of the interband phase difference (Leggett) mode with magnetic modes, dramatically changing the hydromagnetostatics of the system. Here we report this effect for a range of parameters that substantially alter the nature of the topological excitations, leading to solutions characterized by a nontrivial topological invariant, rather than the standard composite vortex solutions. This invariant is not truly topologically conserved but is energetically conserved, leading to a texture formed of bound excitations in each band, namely fractional vortices, each carrying a fraction of the flux quantum. We demonstrate that in this regime there is a rich spectrum of Skyrmion solutions, with various topological charges, that are robust with respect to changes of parameters of the system and present for a wide range of anisotropies.
description: 11 pages, 13 figures
Some Comments on Branes, G-flux, and K-theory
Creators: name: Moore, Gregory
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This is a summary of a talk at Strings2000 explaining three ways in which string theory and M-theory are related to the mathematics of K-theory.
description: 10pp., latex
On the numerical approximation of a viscoelastodynamic problem with unilateral constraints
Creators: name: Petrov, Adrien
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: Viscoelasticity
subject: Signorini conditions
subject: numerical scheme
subject: variational inequality
subject: 35L85
subject: 65N30
subject: 73D99

description: The present work is dedicated to the study of numerical schemes for a viscoelastic bar vibrating longitudinally and having its motion limited by rigid obstacles at the both ends. Finite elements and finite difference schemes are presented and their convergence is proved. Finally, some numerical examples are reported and analyzed.
Galactic Halo substructure in the Sloan Digital Sky Survey: the ancient tidal stream from the Sagittarius dwarf galaxy
Creators: name: Ibata, Rodrigo
name: Irwin, Michael
name: Lewis, Geraint
name: Stolte, Andrea
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two studies have recently reported the discovery of pronounced Halo substructure in the Sloan Digital Sky Survey (SDSS) commissioning data. Here we show that this Halo substructure is almost in its entirety due to the expected tidal stream torn off the Sagittarius dwarf galaxy during the course of its many close encounters with the Milky Way. This interpretation makes strong predictions on the kinematics and distances of these stream stars. Comparison of the structure in old horizontal branch stars, detected by the SDSS team, with the carbon star structure discovered in our own survey, indicates that this halo stream is of comparable age to the Milky Way. It would appear that the Milky Way and the Sagittarius dwarf galaxy have been a strongly interacting system for most of their existence. Once complete, the SDSS will provide a unique dataset with which to constrain the dynamical evolution of the Sagittarius dwarf galaxy, it will also strongly constrain the mass distribution of the outer Milky Way.
description: 7 pages, 3 figures (1 color figure chunky due to PS compression), minor revisions,accepted by ApJL
Nonlinear focal modulation microscopy
Creators: name: Zhao, Guangyuan
name: Zheng, Cheng
name: Kuang, Cuifang
name: Zhou, Renjie
name: Kabir, Mohammad M
name: Toussaint, Kimani C.
name: Wang, Wensheng
name: Xu, Liang
name: Li, Haifeng
name: Xiu, Peng
name: Liu, Xu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Here we report nonlinear focal modulation microscopy (NFOMM) to achieve super-resolution imaging. Abandoning the previous persistence on minimizing the size of Gaussian emission pattern by directly narrowing (e.g. Minimizing the detection pinhole in Airyscan, Zeiss) or by indirectly peeling its outer profiles (e.g., Depleting the outer emission region in STED, stimulated emission microscopy) in pointwise scanning scenarios, we stick to a more general basis------ maximizing the system frequency shifting ability. In NFOMM, we implement a nonlinear focal modulation by applying phase modulations with high-intensity illumination, thereby extending the effective spatial-frequency bandwidth of the imaging system for reconstructing super-resolved images. NFOMM employs a spatial light modulator (SLM) for assisting pattern-modulated pointwise scanning, making the system single beam path while achieving a transverse resolution of 60 nm on imaging fluorescent nanoparticles. While exploring a relatively simple and flexible system, the imagingperformance of NFOMM is comparable with STED as evidenced in imaging nuclear pore complexes, demonstrating NFOMM is a suitable observation tool for fundamental studies in biology. Since NFOMM is implemented as an add-on module to an existing laser scanning microscope and easy to be aligned, we anticipate it will be adopted rapidly by the biological community.
description: 5 Figures, under review in PRL
A new approach to study limit cycles on a cylinder
Creators: name: Cherkas, Leonid
name: Grin, Alexander
name: Schneider, Klaus R.
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: planar system
subject: cylindrical phase space
subject: location and number of limit cycles of first and second kind
subject: Dulac-Cherkas function
subject: 34C05
subject: 34C07

description: We present a new approach to study limit cycles of planar systems of autonomous differential equations with a cylindrical phase space $Z$. It is based on an extension of the Dulac function which we call Dulac-Cherkas function $Psi$. The level set $W:=vf,y) in Z: Psi(vf,y)=0$ plays a key role in this approach, its topological structure influences existence, location and number of limit cycles. We present two procedures to construct Dulac-Cherkas functions. For the general case we describe a numerical approach based on the reduction to a linear programming problem and which is implemented by means of the computer algebra system Mathematica. For the class of generalized Liénard systems we present an analytical approach associated with solving linear differential equations and algebraic equations.
Hierarchies of Length Scale Based Typology in Anisotropic Multiband Superconductor
Creators: name: Winyard, Thomas
name: Silaev, Mihail
name: Babaev, Egor
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Since Ginzburg and Landau's seminal work in 1950 superconducting states have been classified by the hierarchy of the fundamental length scales of the theory; the magnetic field penetration lengths and coherence lengths. In the simplest single-component case they form a dimensionless ratio κ. As pointed out by Ginzburg in 1952, in general the ratio depends on the direction of the applied magnetic field due to material anisotropies. Single component materials can therefore display type-1 superconductivity when the field is applied in one direction and type-2 when the field is applied in a different direction. In this paper we expand the above length scale analysis to anisotropic multi-component superconductors, that can have multiple coherence lengths as well as multiple magnetic field penetration lengths, leading to unconvential length scale hierarchies. We demonstrate that the anisotropies in multi-band superconductors cannot in general be rescaled, leading to new regimes with various mixed hierarchies in different directions. For example, a regime is possible, where for a field applied in a certain direction coherence lengths are smaller than the magnetic field penetration lengths in one of the perpendicular directions, where as the penetration lengths are lager in the another direction. We demonstrate a new regime, where vortices form stripes in the direction where coherence lengths exceed the magnetic field penetration length and vortex cores overlap, while the vortex stripes repel each other in the orthogonal direction where the magnetic field penetration length exceeds the coherence lengths.
description: 12 pages, 9 figures
A posteriori optimization of parameters in stabilized methods for convection-diffusion problems --- Part I
Creators: name: John, Volker
name: Knobloch, Petr
name: Savescu, Simona B.
Publisher: name: Weierstrass Institute
Year: 2010
Subjects: subject: convection-diffusion problems
subject: stabilized finite element methods
subject: parameter optimization
subject: SUPG method
subject: residual-based error estimator
subject: 65N30

description: Stabilized finite element methods for convection-dominated problems require the choice of appropriate stabilization parameters. From numerical analysis, often only their asymptotic values are known. This paper presents a general framework for optimizing the stabilization parameters with respect to the minimization of a target functional. Exemplarily, this framework is applied to the SUPG finite element method and the minimization of a residual-based error estimator and error indicator. Benefits of the basic approach are shown and further improvements are discussed.
Triangular singularity and a possible $ϕp$ resonance in the $Λ^+_c \to π^0 ϕp$ decay
Creators: name: Xie, Ju-Jun
name: Guo, Feng-Kun
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the $Λ^+_c \to π^0 ϕp$ decay by considering a triangle singularity mechanism. In this mechanism, the $Λ^+_c$ decays into the $K^* Σ^*(1385)$, the $Σ^*(1385)$ decays into the $π^0 Σ$ (or $Λ$), and then the $K^* Σ$ (or $Λ$) interact to produce the $ϕp$ in the final state. This mechanism produces a peak structure around $2020$ MeV. In addition, the possibility that there is a hidden-strange pentaquark-like state is also considered by taking into account the final state interactions of $K^* Λ$, $K^* Σ$, and $ϕp$. We conclude that it is difficult to search for the hidden-strange analogue of the $P_c$ states in this decay. However, we do expect nontrivial behavior in the $ϕp$ invariant mass distribution. The predictions can be tested by experiments such as BESIII, LHCb and Belle-II.
description: 7 pages, 3 figures
title: Technical measures can be shown by experiment to reduce the capture of unwanted fish, but can we see the effect on the stock ina stochastic world?
Creators: name: Eustace, B.
name: Kelly, C.J.
name: Jackson, E.H.
name: Rihan, D.
Publisher: name: ASC 2007 - Theme session O
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.Technical Conservation measures (TCMs) have the potential to reduce fishing mortality by reducing unwanted catch. Gear trials were conducted by Bord Iascaigh Mhara (BIM) in June 2005 as part of the EU funded NECESSITY project (CT-2003- 501605) to assess the potential benefits of using a coverless trawl in a standard 80mm Nephrops trawl. Results from these trials indicate that substantial reductions in bycatch are possible without compromising the catch of the target species. However, the putative effect of this TCM on fishing mortality of the caught stocks has received little attention to date. The analysis presented here has been conducted as part of the EU funded EFIMAS project (CT-2003-502516) to evaluate the potential effect of such TCMs on whitefish stocks in the Celtic Sea (VIIe-k). For this paper we have focused on whiting in the Celtic Sea which showed the largest reduction in catch numbers with the coverless trawl in these trials. Stock projections were simulated using F-PRESS (Fisheries Projection & Evaluation by Stochastic Simulation), a simulation tool for evaluating fisheries management strategies. Our results indicate that while a difference in stock development can be shown deterministically, following the introduction of the coverless trawl on the Nephrops fleets, such a difference is difficult to detect when assessment uncertainty is added. We then try to answer, given the volume of whiting catch by fleet segment, and the assessment uncertainty; how big would the effect of the technical measure have to be, such that we could measure a difference (with confidence) in spawning stock biomass (SSB) over 10 years. The results raise some interesting questions on how we can evaluate the merit of measures which we can demonstrate by experiment to have an effect, but from which we may not be able to detect any stock benefit.