cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analyse des dépenses pour la biodiversité à Madagascar
Creators: name: RAHARINAIVO Liva Jackson
Publisher: name: Zenodo
Year: 2024

description: La biodiversité de Madagascar, grâce à son fort taux d’endémicité, faite partie des plus importantes du monde, aussi bien pour les espèces animales que végétales. Il existe environ 15 000 espèces de plantes dont plus de 83% sont endémiques. La grande Iles possède environ 5% des réserves mondiales de biodiversité. 

Madagascar est un Etat insulaire située dans l’Océan Indien, à 400 km à l’est des côtes orientales africaines au niveau de la Tanzanie et du Mozambique. Elle est la quatrième plus grande île du monde avec une superficie de 597 000 km2. Elle s’étend sur 1 600 km du nord au sud et sur 580 km d’est en ouest. Compte tenu de sa superficie et des variations de reliefs, le climat et les saisons sont variables d’une partie à l’autre de Madagascar : chaud et humide sur la côte est avec une forêt dense, très agréable sur les plateaux du centre et chaud et sec sur le versant ouest.  Madagascar connait une saison pluvieuse de novembre au mars. C’est surtout valable pour la côte est. 

L’activité économique de Madagascar est étroitement liée à la biodiversité. L’activité industrielle étant très faible, les activités principales du pays se rattachent à l’agriculture, à l’élevage, à la pêche et au tourisme.

Toutefois, le patrimoine naturel unique de Madagascar, sur lequel dépend son économie est sévèrement menacé de disparition. La forêt naturelle qui couvrait la majeure partie de l’île disparait très rapidement, les ressources aquatiques semblent suivre cette tendance.  Aussi, est-il important de procéder à sa protection et à sa gestion durable.

Afin d’assurer une finance durable des ressources naturelles de Madagascar, le PNUD met en place l’Initiative de Finance de la Biodiversité -BIOFIN. Il existe 4 étapes pour réaliser la BIOFIN. L’une de ces étapes c’est l’Analyse des Dépenses de la Biodiversité (ADB). Ce rapport d’ADB englobe l’étude des dépenses liées à la biodiversité de Madagascar dans tous les secteurs : public, privé et ONG. La période d’études retenue est entre 2014 et 2018. Le choix de cette période dépend de la disponibilité des données Le cas de la loi de règlement qui montre l’ensemble des dépenses et des recettes réelles de l’Etat n’est pas encore disponible pour l’année 2019.
Deliverable-Oriented Work Breakdown Structure: A Software Project Scope Verification Tool
Creators: name: Hans, Robert T.
Publisher: name: Zenodo
Year: 2021
Subjects: Software scope verification
scope management
scope definition
WBS
inspection

description: Software project scope verification is an essential aspect in project scope management that must be completed correctly to prevent project rework and improve project scope control. A software project scope is defined as the work that needs to be carried out to create the required product with its necessary functions and features. Moreover, software scope verification is crucial in the process of delivering exactly what the customer requested and minimizing project scope changes. Well-defined software scope eases the process of scope verification and contributes to project success. A deliverable-oriented WBS often serves as a roadmap to a well-defined software scope of work. This chapter expands the use of deliverable-oriented WBS to the scope verification process on the basis of this. A deliverable-oriented WBS, according to this article, is a method for software scope verification.
Smooth attractors for strongly damped wave equations
Creators: name: Pata, Vittorino
name: Zelik, Sergey
Publisher: name: Weierstrass Institute
Year: 2006
Subjects: subject: Strongly damped wave equation
subject: critical and supercritical growths
subject: compact global attractors
subject: regularity
subject: 35B33
subject: 35B40
subject: 35L05
subject: 35M10

description: This paper is concerned with the semilinear strongly damped wave equation $$ptt u-Delta pt u-Delta u+varphi(u)=f.$$ The existence of compact global attractors of optimal regularity is proved for nonlinearities $varphi$ of critical and supercritical growth.
The LBDS Hercules sample of millijansky radio sources at 1.4 GHz: I. Multi-colour photometry
Creators: name: Waddington, I.
name: Windhorst, R. A.
name: Dunlop, J. S.
name: Koo, D. C.
name: Peacock, J. A.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The results are presented of an extensive programme of optical and infrared imaging of radio sources in a complete subsample of the Leiden-Berkeley Deep Survey. The LBDS Hercules sample consists of 72 sources observed at 1.4 GHz, with flux densities S(1.4) >= 1.0 mJy, in a 1.2 deg^2 region of Hercules. This sample is almost completely identified in the g, r, i and K bands, with some additional data available at J and H. The magnitude distributions peak at r ~= 22 mag, K ~= 16 mag and extend down to r ~= 26 mag, K ~= 21 mag. The K-band magnitude distributions for the radio galaxies and quasars are compared with those of other radio surveys. At S(1.4) ~ 6). Although small, this is the most optically complete sample of millijansky radio sources available at 1.4 GHz, and is ideally suited to study the evolution of the radio luminosity function out to high redshifts.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society. 25 pages, 10 figures (in 53 EPS files). Uses mn.sty
Attractors and their regularity for 2-D wave equations with nonlinear damping
Creators: name: Pata, Vittorino
name: Zelik, Sergey
Publisher: name: Weierstrass Institute
Year: 2006
Subjects: subject: Wave equation
subject: nonlinear damping
subject: compact global attractor
subject: exponential attractor
subject: 35B41
subject: 35L05
subject: 74K15

description: We address the study of a weakly damped wave equation in space-dimension two, with a damping coefficient depending on the displacement. The equation is shown to generate a semigroup possessing a compact global attractor of optimal regularity, as well as an exponential attractor.
Melieria subapennina Rondani 1869
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ulidiidae
Melieria
Melieria subapennina

description: Melieria subapennina Rondani, 1869
ORIGINAL DESCRIPTION: 1869a: 17 (key), 18 (description).
 TYPE LOCALITY: “ in collibus ditionis parmensis … in Pedemontio [Parmese hills … Piedmont (Italy)]”.
 TYPE MATERIAL: 1 ♀, lectotype (MZUF: Box 30): Melieria Desv. / subapennina Rnd., Apenn. [= Apennines] / 1602 / Holotypus [incorrectly labeled] Melieria subapennina Rnd., ♀, desig. Á. Soós, 1978.
 PARALECTOTYPES NOT EXAMINED: 4 ♂♂ (MRSN): 21 66 / Melieria Desv. subapennina Rond., Ivrea; 3 ♀♀ (MRSN): 21 66 / Melieria Desv. subapennina Rond., Ivrea; 1 ♀ (MRSN): 21 66 / 124 / Melieria Desv. subapennina Rond., Ivrea [= Ivrea (Piedmont)].
 CURRENT STATUS: valid species, as Hypochra subapennina (Soós 1984c: 50, Belcari et al. 1995b: 6); valid species, as Melieria (Hypochra) subapennina (Kameneva 1997: 34).
 REMARKS: Rondani (1869a: 18) described Melieria subapennina without specifying the number, the sex or the length of the specimens he had collected and also received from L. Bellardi. Soós (1983: 256) designated a lectotype (♀) but did not mention an additional eight specimens in the MRSN (all are paralectotypes).
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 387, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Inner Parallel Sets in Mixed-Integer Optimization
Creators: name: Neumann, Christoph
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021
Subjects: optimization
cutting plane
inner parallel set

description: This thesis contains an extensive study of inner parallel sets in mixed-integer optimization. Inner parallel sets are a recent idea in this context and offer a possibility to relax the difficulties imposed by integrality constraints by guaranteeing feasibility of roundings of their (continuous) elements. To be able to use inner parallel sets algorithmically, various modifications, such as their enlargements and inner and outer approximations, are helpful and sometimes even necessary. Such ideas are introduced and investigated in this thesis, both theoretically as well as computationally. From our theoretical study of inner parallel sets emerge a number of feasible rounding approaches which mainly focus on the computation of good feasible points for mixed-integer linear and nonlinear minimization problems. Good feasible points are useful in the context of solving these problems by providing tight upper bounds on the objective value. In especially difficult cases, feasible rounding approaches may also be considered as an alternative to solving a problem. The contributions of this thesis include a thorough discussion of possibilities to enlarge inner parallel sets in the linear as well as in the nonlinear setting. Moreover, we introduce a novel cutting plane method based on inner parallel sets for mixed-integer convex minimization problems. This method, in addition to computing a good feasible point, also provides a lower bound on the objective value which is another important ingredient for solving such minimization problems. We study the possibility of dealing with equality constraints on integer variables which at first glance seem to prevent a nonempty inner parallel set. Under the occurrence of such constraints, we show that inner parallel sets can be nonempty in a reduced variable space, which allows the application of feasible rounding approaches. Finally, we investigate the behavior of inner parallel sets when integrated into search trees. Our study gives rise to a novel diving method which turns out to be a major improvement over standalone feasible rounding approaches. We test the introduced methods on standard libraries for mixed-integer linear, convex and nonconvex minimization problems separately in several computational studies. The computational results illustrate the potential of our ideas.
Observation of optical vortices in momentum space
Creators: name: Zhang, Yiwen
name: Chen, Ang
name: Liu, Wenzhe
name: Hsu, Chia Wei
name: Guan, Fang
name: Liu, Xiaohan
name: Shi, Lei
name: Lu, Ling
name: Zi, Jian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Vortex, the winding of a vector field in two dimensions, has its core the field singularity and its topological charge defined by the quantized winding angle of the vector field. Vortices are one of the most fundamental topological excitations in nature, widely known in hair whorls as the winding of hair strings, in fluid dynamics as the winding of velocities, in angular-momentum beams as the winding of phase angle and in superconductors and superfluids as the winding of order parameters. Nevertheless, vortices have hardly been observed other than those in the real space. Although band degeneracies, such as Dirac cones, can be viewed as momentum-space vortices in their mathematical structures, there lacks a well-defined physical observable whose winding number is an arbitrary signed integer. Here, we experimentally observed momentum-space vortices as the winding of far-field polarization vectors in the Brillouin zone (BZ) of periodic plasmonic structures. Using a home-made polarization-resolved momentum-space imaging spectroscopy, we completely map out the dispersion, lifetime and polarization of all radiative states at the visible wavelengths. The momentum space vortices were experimentally identified by their winding patterns in the polarization-resolved iso-frequency contours and their diverging radiative quality factors. Such polarization vortices can exist robustly on any periodic systems of vectorial fields, while they are not captured by the existing topological band theory developed for scaler fields. This work opens up a promising avenue for exploring topological photonics in the momentum space, studying bound states in continuum (BICs), as well as for rendering and steering vector beams and designing high-Q plasmonic resonances.
description: 7 pages, 4 figures
Venus adjustment of apogee, al Khwarizmi by Suter (Heinrich) (1914) | Type-B (ID n° 413)
Creators: name: Suter, Heinrich
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Astronomy
History of astronomy
DISHAS
Astronomical table

description: This is a type B edition: A type-B edition corresponds to a critical edition of several table witnesses:
 it is based on several different editions, themselves based on tables from different primary sources.
 A type-B edition can be based on type-A, type-B or type-C editions.
You can find it on the DISHAS project website from this link: https://dishas.obspm.fr/table-edition/413
description: Source: Die Astronomischen Taflen des Muhanned Ibn Musa al-Khwarizmi, Suter (Heinrich), 1914
Stochastic simulation of flows and particle transport in porous tubes
Creators: name: Sabelfeld, Karl
name: Kurbanmuradov, Orazgeldi
name: Levykin, Alexander
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: Darcy equation
subject: random hydraulic conductivity
subject: Lagrangian trajectory
subject: Randomized spectral models
subject: lognormal random fields
subject: 65C05
subject: 76S05
subject: 02.70q
subject: 05.10.Ln

description: A Monte Carlo method is developed for stochastic simulation of flows and particle transport in tubes filled with a porous medium. The hydraulic conductivity is assumed to be a random field of a given statistical structure, the flow is modelled in a tube with prescribed boundary conditions. Numerical experiments are carried out by solving the random Darcy equation for each sample of the hydraulic conductivity by a SOR iteration method, and tracking Lagrangian trajectories in the simulated flow. We present and analyze different Eulerian and Lagrangian statistical characteristics of the flow such as transverse and longitudinal velocity correlation functions, diffusion coefficients, the mean and variance of Lagrangian trajectories, and discuss a ''stagnation" effect which was found in our simulations.
Realization, Characterization, and Detection of Novel Superfluid Phases with Pairing between Unbalanced Fermion Species
Creators: name: Yang, Kun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this chapter we review recent experimental and theoretical work on various novel superfluid phases in fermion systems, that result from pairing fermions of different species with unequal densities. After briefly reviewing existing experimental work in superconductors subject to a strong magnetic field and trapped cold fermionic atom systems, we discuss how to characterize the possible pairing phases based on their symmetry properties, and the structure/topology of the Fermi surface(s) formed by the unpaired fermions due to the density imbalance. We also discuss possible experimental probes that can be used to directly detect the structure of the superfluid order parameter in superconductors and trapped cold atom systems, which may establish the presence of some of these phases unambiguously.
description: Final version as appeared in print. 20 pages
Nodal portraits of quantum billiards: Domains, lines, and statistics
Creators: name: Jain, Sudhir R.
name: Samajdar, Rhine
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present a comprehensive review of the nodal domains and lines of quantum billiards, emphasizing a quantitative comparison of theoretical findings to experiments. The nodal statistics are shown to distinguish not only between regular and chaotic classical dynamics but also between different geometric shapes of the billiard system itself. We discuss, in particular, how a random superposition of plane waves can model chaotic eigenfunctions and highlight the connections of the complex morphology of the nodal lines thereof to percolation theory and Schramm-Loewner evolution. Various approaches to counting the nodal domains---using trace formulae, graph theory, and difference equations---are also illustrated with examples. The nodal patterns addressed pertain to waves on vibrating plates and membranes, acoustic and electromagnetic modes, wavefunctions of a "particle in a box'" as well as to percolating clusters, and domains in ferromagnets, thus underlining the diversity---and far-reaching implications---of the problem.
Multicomponent Dark Matter in Radiative Seesaw Models
Creators: name: Aoki, Mayumi
name: Kaneko, Daiki
name: Kubo, Jisuke
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss radiative seesaw models, in which an exact $Z_2\times Z_2'$ symmetry is imposed. Due to the exact $Z_2\times Z_2'$ symmetry, neutrino masses are generated at a two-loop level and at least two extra stable electrically neutral particles are predicted. We consider two models: one has a multi-component dark matter system and the other one has a dark radiation in addition to a dark matter. In the multi-component dark matter system, non-standard dark matter annihilation processes exist. We find that they play important roles in determining the relic abundance and also responsible for the monochromatic neutrino lines resulting from the dark matter annihilation process. In the model with the dark radiation, the structure of the Yukawa coupling is considerably constrained and gives an interesting relationship among cosmology, lepton flavor violating decay of the charged leptons and the decay of the inert Higgs bosons.
description: 28 pages, 13 figures and 2 tables. Version accepted in the 'Frontiers in Physics' Research Topic 'The Physics Associated with Neutrino Masses'
Additional file 5 of Inhibition of alpha-synuclein seeded fibril formation and toxicity by herbal medicinal extracts
Creators: name: Ardah, Mustafa
name: Ghanem, Simona
name: Abdulla, Sara
name: Lv, Guohua
name: Emara, Mohamed
name: Paleologou, Katerina
name: Vaikath, Nishant
name: Lu, Jia-Hong
name: Li, Min
name: Vekrellis, Konstantinos
name: Eliezer, David
name: El-Agnaf, Omar
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Neuroscience
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 5. Effect of CMCs on the seeding of α-syn monomers with fibrils. α-syn monomers (100 μM) were seeded with 2 μM sonicated α-syn fibrils, incubated with or without A: CMC2, B: CMC3, C: CMC4, D: CMC5, E: CMC6, F: CMC8 and G: CMC9, H: CMC10 and I: CMC11 at different concentrations (10 and 50 μM) for 6 h with continuous shaking at 37 °C. Th-T binding assay estimated fibril formation. Assays were performed in triplicates (average of triplicate measurements ± standard deviations.
Framework for Validating Geographic Profiling Using Samples of Solved Serial Crimes
Creators: name: Wilpen  Gorr
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: This short paper was prepared for the NIJ Roundtable for Developing an Evaluation Methodology for Geographic Profiling Software (August 10 and 11, 2004) on approaches for validating geographic profiling (GP) methods. The paper presents a framework for validating any GP method or software package using solved serial crimes including data on crime locations and criminal residences or other anchor points (e.g., work location, girl friend’s residence, etc.). Findings from the literature and through analysis include: 1) the appropriate performance measure for GP (that matches policing needs and as extended in this paper) concerns prioritizing relevant areas for investigation; 2) future work should correct the performance measure of GP by excluding irrelevant areas from consideration such as rivers, lakes, cemeteries, etc. (past studies apparently did not do this); 3) additional model parameters may be able to be estimated in empirical studies such as the amount to expand the search area for a serial criminal beyond the minimum rectangle or other boundary enclosing crime sites; and 4) future validation studies for GP should compare alternative models, including simple models for benchmarking, and use holdout samples in a resampling scheme for validating performance.
Spectral Flattening at Low Frequencies in Crab Giant Pulses
Creators: name: Meyers, B. W.
name: Tremblay, S. E.
name: Bhat, N. D. R.
name: Shannon, R. M.
name: Kirsten, F.
name: Sokolowski, M.
name: Tingay, S. J.
name: Oronsaye, S. I.
name: Ord, S. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on simultaneous wideband observations of Crab giant pulses with the Parkes radio telescope and the Murchison Widefield Array (MWA). The observations were conducted simultaneously at 732 and 3100 MHz with Parkes, and at 120.96, 165.76 and 210.56 MHz with the MWA. Flux density calibration of the MWA data was accomplished using a novel technique based on tied-array beam simulations. We detected between 90-648 giant pulses in the 120.96-210.56 MHz MWA subbands above a $ 5.5σ$ threshold while in the Parkes subbands we detected 6344 and 231 giant pulses above a threshold of $ 6σ$ at 732 and 3100 MHz, respectively. We show, for the first time over a wide frequency range, that the average spectrum of Crab giant pulses exhibits a significant flattening at low frequencies. The spectral index, $ α$, for giant pulses evolves from a steep, narrow distribution with a mean $ α=-2.6 $ and width $σ_α=0.5 $ between 732 and 3100 MHz, to a wide, flat distribution of spectral indices with a mean $ α=-0.7 $ and width $ σ_α=1.4 $ between 120.96 and 165.76 MHz. We also comment on the plausibility of giant pulse models for Fast Radio Bursts based on this spectral information.
description: 21 pages, 12 figures, 8 tables, accepted for publication in ApJ
Griselda y Gualtero. Nueva relación: Digital edition
Creators: name: Leblanc Elina
Publisher: name: Zenodo
Year: 2021
Subjects: Spanish literature
Digital edition
XML-TEI

description: Digital edition of a Spanish pliego de cordel, published by the Andalusian printer José María Moreno (19th c.). It contains the XML-TEI file of the edition, as well as the files that led to this edition, i.e. the digital facsimiles (raw and retouched), and the transcription produced by the OCR tool Transkribus (PAGE-XML). This digital edition is a part of the research project Desenrollando el cordel / Untangling the cordel / Démêler le cordel (2020-2022), led by the professor Constance Carta at the University of Geneva and supported by the philanthropic Sandoz-Monique de Meuron Family Foundation.
Analysis of Segregated Boundary-Domain Integral Equations for BVPs with Non-smooth Coefficient on Lipschitz Domains
Creators: name: Mikhailov, Sergey E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J25, 31B10, 45K05, 45A05

description: Segregated direct boundary-domain integral equations (BDIEs) based on a parametrix and associated with the Dirichlet and Neumann boundary value problems for the linear stationary diffusion partial differential equation with a variable non-smooth (or limited-smoothness) coefficient on Lipschitz domains are formulated. The PDE right hand sides belong to the Sobolev (Bessel-potential) space $H^{s-2}(Ω)$ or $\widetilde H^{s-2}(Ω)$, $1/2
description: 52 pages. arXiv admin note: substantial text overlap with arXiv:1509.03501
Forecasting Crime
Creators: name: Wilpen  Gorr
name: Olligschlaeger, Andreas M.
name: Szczypula, Janusz
name: Thompson, Yvonne
Publisher: name: Carnegie Mellon University
Year: 1999
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: Organizations in the private sector must do strategic planning over long-term horizons to locate new facilities, plan new products, develop competitive advantages, and so forth. Consequently, long-term forecasts of demand, costs of raw materials, etc. are important in the private sector. There is no such strategic counterpart to police work; consequently, long-term forecasts are of little value to police. Police primarily need short-term forecasts; for example, crime levels one week or one month ahead. Currently, police mostly respond to new crime patterns as they occur. Client-server computing for realtime access to police records and computerized crime mapping have made it possible for police to keep abreast with crime. With short-term forecasting police may be able to get one step ahead of criminals by anticipating and preventing crime. The organization of this paper proceeds first with a description of short-term forecasting models, to provide basic terms and concepts. Next is a discussion of unique features of crime space-time series data, and the need for data pooling to handle small-area model estimation problems. Lastly are a discussion of particular forecasting requirements of police and a summary.
Griselda y Gualtero. Nueva relación: Digital edition
Creators: name: Leblanc Elina
Publisher: name: Zenodo
Year: 2024
Subjects: Spanish literature
Digital edition
XML-TEI

description: Digital edition of a Spanish pliego de cordel, published by the Andalusian printer José María Moreno (19th c.). It contains the XML-TEI file of the edition, as well as the files that led to this edition, i.e. the digital facsimiles (raw and retouched), and the transcription produced by the OCR tool Transkribus (PAGE-XML). This digital edition is a part of the research project Desenrollando el cordel / Untangling the cordel / Démêler le cordel (2020-2024), led by professor Constance Carta at the University of Geneva and supported by the philanthropic Sandoz-Monique de Meuron Family Foundation.
Parallel simulation of high power semiconductor lasers
Creators: name: Lichtner, Mark
name: Spreemann, Martin
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: parallel computation
subject: numerical simulation of optoelectronic devices
subject: laser dynamics
subject: initial boundary value problem of hyperbolic type
subject: comparison with experimental data
subject: 65Y05
subject: 37M05
subject: 37L65
subject: 35L45
subject: 35Q60
subject: 65M70
subject: 65M06

description: High power tapered semiconductor lasers are characterized by a huge amount of structural and geometrical design parameters and are subject to time-space instabilities like pulsations, self-focussing, filamentation and thermal lensing which yield restrictions to output power, beam quality and wavelength stability. Numerical simulations are an important tool for finding optimal design parameters, understanding the complicated dynamical behavior and for predicting new laser designs. We present fast dynamic high performance parallel simulation results based on traveling wave equations which are suitable for model calibration and parameter scanning of the long time dynamics in reasonable time. Simulation results are compared to experimental data.
Fe Doped Magnetic Nanodiamonds Made by Ion Implantation as Contrast Agent for MRI
Creators: name: Lin, Bo-Rong
name: Chen, Chien-Hsu
name: Kunuku, Srinivasu
name: Chen, Tzung-Yuang
name: Hsiao, Tung-Yuan
name: Niu, Huan
name: Lee, Chien-Ping
Publisher: name: arXiv
Year: 2017
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report in this paper a new MRI contrast agent based on magnetic nanodiamonds fabricated by Fe ion implantation. The Fe atoms that are implanted into the nanodiamonds are not in direct contact with the outside world, enabling this new contrast agent to be free from cell toxicity. The image enhancement was shown clearly through T2 weighted images. The concentration dependence of the T2 relaxation time gives a relaxivity value that is about seven times that of the regular non-magnetic nanodiamonds. Cell viability study has also been performed. It was shown that they were nearly free from cytotoxicity independent of the particle concentration used. The imaging capability demonstrated here adds a new dimension to the medical application of nanodiamonds. In the future one will be able to combine this capability of magnetic nanodiamonds with other functions through surface modifications to perform drug delivery, targeted therapy, localized thermal treatment and diagnostic imaging at the same time.
Homogeneous nucleation for Glauber and Kawasaki dynamics in large volumes at low temperatures
Creators: name: Bovier, Anton
name: Den Hollander, Frank
name: Spitoni, Cristian
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: Glauber dynamics
subject: Kawasaki dynamics
subject: critical droplet
subject: metastable transition time
subject: last-exit biased distribution
subject: Dirichlet principle
subject: Berman-Konsowa principle
subject: capacity
subject: flow
subject: cluster expansion
subject: 60K35
subject: 82C26

description: In this paper we study metastability in large volumes at low temperatures. We consider both Ising spins subject to Glauber spin-flip dynamics and lattice gas particles subject to Kawasaki hopping dynamics. Let $b$ denote the inverse temperature and let $L_b subset Z^2$ be a square box with periodic boundary conditions such that $lim_btoinfty L_b =infty$. We run the dynamics on $L_b$ starting from a random initial configuration where all the droplets (= clusters of plus-spins, respectively, clusters of particles) are small. For large $b$, and for interaction parameters that correspond to the metastable regime, we investigate how the transition from the metastable state (with only small droplets) to the stable state (with one or more large droplets) takes place under the dynamics. This transition is triggered by the appearance of a single emphcritical droplet somewhere in $L_b$. Using potential-theoretic methods, we compute the emphaverage nucleation time (= the first time a critical droplet appears and starts growing) up to a multiplicative factor that tends to one as $btoinfty$. It turns out that this time grows as $Ke^Gammab/ L_b $ for Glauber dynamics and $Kb e^Gammab/ L_b $ for Kawasaki dynamics, where $Gamma$ is the local canonical, respectively, grand-canonical energy to create a critical droplet and $K$ is a constant reflecting the geometry of the critical droplet, provided these times tend to infinity (which puts a growth restriction on $ L_b $). The fact that the average nucleation time is inversely proportional to $ L_b $ is referred to as emphhomogeneous nucleation, because it says that the critical droplet for the transition appears essentially independently in small boxes that partition $L_b$.
Additional file 6 of Inhibition of alpha-synuclein seeded fibril formation and toxicity by herbal medicinal extracts
Creators: name: Ardah, Mustafa
name: Ghanem, Simona
name: Abdulla, Sara
name: Lv, Guohua
name: Emara, Mohamed
name: Paleologou, Katerina
name: Vaikath, Nishant
name: Lu, Jia-Hong
name: Li, Min
name: Vekrellis, Konstantinos
name: Eliezer, David
name: El-Agnaf, Omar
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Neuroscience
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences

description: Additional file 6. Effects of CMCs on α-syn aggregation in primary neuronal cultures. Mouse primary cultures (6div) were treated with seeds and CMCs at (1:5 and 1:20) ratio for 72 h. In some experiments, neurons were pre-treated with the CMCs for 24 h before addition of the seeds. Following Triton-X extraction, synuclein species were visualized with the α-syn antibody C20. Insoluble α-Syn species were increased following treatment with the seeds. No changes were observed in pS129- α-syn species in both conditions tested. GAPDH was used as a loading control. 1 CMC 10 (1:5), 2 CMC10 (1:20), 3 CMC 7 (1:5), 4 CMC 7 (1:20), 5 CMC 1 (1:5), 6 CMC1 (1:20), 7 pretreated CMC 7 (1:5), 8 pretreated CMC 7 (1:20), 9 pretreated CMC 1 (1:5), 10 pretreated CMC 1 (1:20), 11 neurons+ seeds, 12 untreated cells.
Stability results for a soil model with singular hysteretic hydrology
Creators: name: Krejčí, Pavel
name: O'Kane, J. Philip
name: Pokrovskii, Alexei
name: Rachinskii, Dmitrii
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: Preisach operator
subject: singular differential equation
subject: periodic solution
subject: 34C55
subject: 34C25
subject: 76S05

description: We consider a differential equation describing the mass balance in a soil hydrology model with noninvertible Preisach-type hysteresis. We approximate the singular Preisach operator by regular ones and show, as main result, that the solutions of the regularized problem converge to a solution of the original one as the regularization parameter tends to zero. For monotone right hand sides, we prove that the solution is unique. If in addition the external water sources are time periodic, then we find sufficient conditions for the existence, uniqueness, and asymptotic stability of periodic solutions.
Contribución a la teoría pedagógica de los proyectos de investigación y las tesis doctorales
Creators: name: Pérez Lemus, Leonardo
Publisher: name: Zenodo
Year: 2024

description: El desarrollo que ha alcanzado en nuestro país la investigación educativa a partir de su cada vez mayor utilización como recurso para la transformación de la realidad educativa y con ello, el enriquecimiento del conocimiento científico pedagógico, no obstante sus indiscutibles éxitos, reclama con relativa urgencia de una profunda revisión crítica que permita responder a un conjunto de problemas que se vienen revelando en la práctica y sobre los cuales es esencial que la comunidad científica se ponga de acuerdo o lo que es lo mismo, se unifiquen sus criterios y experiencias. En la medida en que se logre este acuerdo ello contribuirá a la elevación del rigor y pertinencia de las investigaciones en el campo de las ciencias pedagógicas, al mismo tiempo que se estará en mejores condiciones de orientar con mayor seguridad el trabajo de los investigadores, particularmente de aquellos que se abocan a su ejecución en el marco de un proceso de formación de cualquier tipo y muy en especial, el académico de postgrado (maestrías y doctorados).
New nonuniform black string solutions
Creators: name: Kleihaus, Burkhard
name: Kunz, Jutta
name: Radu, Eugen
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present nonuniform vacuum black strings in five and six spacetime dimensions. The conserved charges and the action of these solutions are computed by employing a quasilocal formalism. We find qualitative agreement of the physical properties of nonuniform black strings in five and six dimensions. Our results offer further evidence that the black hole and the black string branches merge at a topology changing transition. We generate black string solutions of the Einstein-Maxwell-dilaton theory by using a Harrison transformation. We argue that the basic features of these solutions can be derived from those of the vacuum black string configurations.
description: 30 pages, 12 figures; v2: more details on numerical method, references added; v3: references added, minor revisions, version accepted by journal
The Airy$_1$ process is not the limit of the largest eigenvalue in GOE matrix diffusion
Creators: name: Bornemann, Folkmar
name: Ferrari, Patrik
name: Prähofer, Michael
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: KPZ class
subject: Random Matrices
subject: Airy processes
subject: 82C22
subject: 60K35

description: Using a systematic approach to evaluate Fredholm determinants numerically, we provide convincing evidence that the Airy$_1$-process, arising as a limit law in stochastic surface growth, is not the limit law for the evolution of the largest eigenvalue in GOE matrix diffusion
Slow decorrelations in KPZ growth
Creators: name: Ferrari, Patrik
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: KPZ class
subject: correlations
subject: Airy processes
subject: 82C22
subject: 60K35

description: For stochastic growth models in the Kardar-Parisi-Zhang (KPZ) class in $1+1$ dimensions, fluctuations grow as $t^1/3$ during time $t$ and the correlation length at a fixed time scales as $t^2/3$. In this note we discuss the scale of time correlations. For a representant of the KPZ class, the polynuclear growth model, we show that the space-time is non-trivially fibred, having slow directions with decorrelation exponent equal to $1$ instead of the usual $2/3$. These directions are the characteristic curves of the PDE associated to the surface's slope. As a consequence, previously proven results for space-like paths will hold in the whole space-time except along the slow curves.
Modeling solutions with jumps for rate-independent systems on metric spaces
Creators: name: Mielke, Alexander
name: Rossi, Riccarda
name: Savaré, Giuseppe
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: Metric flow
subject: rate-independent systems
subject: quasistatic evolution
subject: vanishing-viscosity limit
subject: parametrized metric solution
subject: approximable solutions
subject: 35K55
subject: 49Q20
subject: 58E99

description: Rate-independent systems allow for solutions with jumps that need additional modeling. Here we suggest a formulation that arises as limit of viscous regularization of the solutions in the extended state space. Hence, our parametrized metric solutions of a rate-independent system are absolutely continuous mappings from a parameter interval into the extended state space. Jumps appear as generalized gradient flows during which the time is constant. The closely related notion of BV solutions is developed afterwards. Our approach is based on the abstract theory of generalized gradient flows in metric spaces, and comparison with other notions of solutions is given.
Stochastic Eulerian model for the flow simulation in porous media. Unconfined aquifers
Creators: name: Kolyukhin, Dmitry R.
name: Sabelfeld, Karl
Publisher: name: Weierstrass Institute
Year: 2004
Subjects: subject: Hydraulic conductivity
subject: Lognormal random field
subject: small fluctuations
subject: Darcy law
subject: randomized spectral representation
subject: 65C05
subject: 76N20

description: This work deals with a stochastic unconfined aquifer flow simulation in statistically isotropic saturated porous media. This approach is a generalization of the 3D model we developed in citeks. In this paper we deal with a 2D model obtained via depth-averaging of the 3D model. The average hydraulic conductivity is assumed to be a random field with a lognormal distribution. Assuming the fluctuations in the hydraulic conductivity to be small we construct a stochastic Eulerian model for the flow as a Gaussian random field with a spectral tensor of a special structure derived from Darcy's law. A randomized spectral representation is then used to simulate this random field. A series of test calculations confirmed the high accuracy and computational efficiency of the method.
Microscopic Structure of High-Spin Vibrational States in Superdeformed A=190 Nuclei
Creators: name: Nakatsukasa, Takashi
name: Matsuyanagi, Kenichi
name: Mizutori, Shoujirou
name: Shimizu, Yoshifumi R.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Microscopic RPA calculations based on the cranked shell model are performed to investigate the quadrupole and octupole correlations for excited superdeformed (SD) bands in even-even A=190 nuclei. The K=2 octupole vibrations are predicted to be the lowest excitation modes at zero rotational frequency. The Coriolis coupling at finite frequency produces different effects depending on the neutron and proton number of nucleus. The calculations also indicate that some collective excitations may produce J(2) moments of inertia almost identical to those of the yrast SD band. An interpretation of the observed excited bands invoking the octupole vibrations is proposed, which suggests those octupole vibrations may be prevalent in even-even SD A=190 nuclei.
description: 6 pages, Latex, using revtex.sty, epsf.sty, multicol.sty, 4 postscript figures included Talk given at the conference on "Nuclear Structure at the Limits", Argonne, Illinois, July 22-26, 1996
Forecasting Analogous Time Series
Creators: name: Duncan, George
name: Wilpen  Gorr
name: Szczypula, Janusz
Publisher: name: Carnegie Mellon University
Year: 1998
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: Organizations that use time series forecasting on a regular basis generally forecast many variables, such as demand for many products or services. Within the population of variables forecasted by an organization, we can expect that there will be groups of analogous time series that follow similar, time-based patterns. The co-variation of analogous time series is a largely untapped source of information that can improve forecast accuracy (and explainability). This paper takes the Bayesian pooling approach to drawing information from analogous time series to model and forecast a given time series. Bayesian pooling uses data from analogous time series as multiple observations per time period in a group-level model. It then combines estimated parameters of the group model with conventional time series model parameters, using “shrinkage” weights estimated empirically from the data. Major benefits of this approach are that it 1) minimizes the number of parameters to be estimated (many other pooling approaches suffer from too many parameters to estimate), 2) builds on conventional time series models already familiar to forecasters, and 3) combines time series and cross-sectional perspectives in flexible and effective ways. Provided are the necessary terms, concepts, and methods to understand Bayesian pooling and the conditions under which we can expect it to have comparative advantages over conventional time series methods. Useful for both practitioners and researchers are requirements stated on experimental data, treatments, and factors for comparative research on forecast accuracy of pooling methods. Lastly, the paper presents basic principles for applying pooling methods and supporting empirical results. The prospect for automatic pooling methods is good, although the best pooled forecasts at the current state of art will depend on expert judgment and manual interventions for time series that have frequent pattern changes.
A Novel Framework of Disambiguation Technique for Discovering Concept Drift
Creators: name: A. Uma Maheswari
name: N. Revathy
Publisher: name: Zenodo
Year: 2021
Subjects: Word Sense Disambiguation (WSD)
concept drift
natural language processing
linguistics

description: Word Sense Disambiguation has been a trending research area in Natural Language Processing. WSD is basically solution to the ambiguity which comes due to different meaning of words in different context. Major problem of WSD is that completely different algorithm might be needed for different applications. This paper presents a brief introduction to Word Sense Disambiguation and provides a structure for discovering concept drift. It works with the situation of the linguistic processing.
title: Table des matières_Le Portefeuille du jeune amateur de la nature, de l'histoire et de l'art
Creators: name: AmateurS
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Table des matières
Number-phase uncertainty and quantum dynamics of bosons and fermions interacting with a finite range and large scattering length in a double-well potential
Creators: name: Adhikary, Kingshuk
name: Mal, Subhanka
name: Deb, Bimalendu
name: Das, Biswajit
name: Dastidar, Krishna Rai
name: Gupta, Subhasish Dutta
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We define the standard quantum limit (SQL) for phase and number fluctuations, and describe two-mode squeezing for number and phase variables. When phase is treated as a unitary quantum-mechanical operator, number and phase operators satisfy an uncertainty relation. As a result, the usual definition of number squeezing parameter becomes modified. Two-mode number squeezing occurs when the number fluctuation goes below the SQL at the cost of enhanced phase fluctuation. As an application of number-phase uncertainty, we consider bosons or fermions trapped in a quasi-one dimensional double-well (DW) potential interacting via a 3D finite-range two-body interaction potential with large scattering length $a_s$. Under tight-binding or two-mode approximation, we describe in detail the effects of the range of interaction on the quantum dynamics and number-phase uncertainty in the strongly interacting or unitarity regime $a_s \rightarrow \pm \infty$. Our results show intriguing coherent dynamics of number-phase uncertainty with number-squeezing for bosons and phase squeezing for fermions. Our results may be important for exploring new quantum interferometry, Josephson oscillations, Bose-Hubbard and Fermi-Hubbard physics with ultracold atoms in DW potentials or DW optical lattices. Particularly interesting will be the question of the importance of quantum phase operators in two-atom interferometry and entanglement.
description: 20 pages, 5 figures
Cosmological Parameters from Velocities, CMB and Supernovae
Creators: name: Bridle, S. L.
name: Zehavi, I.
name: Dekel, A.
name: Lahav, O.
name: Hobson, M. P.
name: Lasenby, A. N.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compare and combine likelihood functions of the cosmological parameters Omega_m, h and sigma_8, from peculiar velocities, CMB and type Ia supernovae. These three data sets directly probe the mass in the Universe, without the need to relate the galaxy distribution to the underlying mass via a "biasing" relation. We include the recent results from the CMB experiments BOOMERANG and MAXIMA-1. Our analysis assumes a flat Lambda CDM cosmology with a scale-invariant adiabatic initial power spectrum and baryonic fraction as inferred from big-bang nucleosynthesis. We find that all three data sets agree well, overlapping significantly at the 2 sigma level. This therefore justifies a joint analysis, in which we find a joint best fit point and 95 per cent confidence limits of Omega_m=0.28 (0.17,0.39), h=0.74 (0.64,0.86), and sigma_8=1.17 (0.98,1.37). In terms of the natural parameter combinations for these data sigma_8 Omega_m^0.6 = 0.54 (0.40,0.73), Omega_m h = 0.21 (0.16,0.27). Also for the best fit point, Q_rms-ps = 19.7 muK and the age of the universe is 13.2 Gyr.
description: 8 pages, 5 figures. Submitted to MNRAS