cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Switchable friction enabled by nanoscale self-assembly on graphene
Creators: name: Gallagher, Patrick
name: Lee, Menyoung
name: Amet, Francois
name: Maksymovych, Petro
name: Wang, Jun
name: Wang, Shuopei
name: Lu, Xiaobo
name: Zhang, Guangyu
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Goldhaber-Gordon, David
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene monolayers are known to display domains of anisotropic friction with twofold symmetry and anisotropy exceeding 200 percent. This anisotropy has been thought to originate from periodic nanoscale ripples in the graphene sheet, which enhance puckering around a sliding asperity to a degree determined by the sliding direction. Here we demonstrate that these frictional domains derive not from structural features in the graphene, but from self-assembly of atmospheric adsorbates into a highly regular superlattice of stripes with period 4 to 6 nm. The stripes and resulting frictional domains appear on monolayer and multilayer graphene on a variety of substrates, as well as on exfoliated flakes of hexagonal boron nitride. We show that the stripe-superlattices can be reproducibly and reversibly manipulated with submicron precision using a scanning probe microscope, allowing us to create arbitrary arrangements of frictional domains within a single flake. Our results suggest a revised understanding of the anisotropic friction observed in graphene and bulk graphite in terms of atmospheric adsorbates.
description: This version contains new data which show that the stripes observed in AFM are adsorbates rather than structural ripples. We also clarify that the stripe axis is parallel to the axis of high friction, rather than perpendicular, as we previously claimed following others' studies; our revised conclusion is based on a more careful imaging sequence which avoided reorienting frictional domains
TIBBIY TASVIRLARNI ANIQLIGI VA ISHONCHLILIGINI BAHOLASH
Creators: name: Nomozova, Noiba
Publisher: name: Zenodo
Year: 2024

description: Tibbiy tasvir zamonaviy sog'liqni saqlashda muhim rol o'ynaydi. Kasalliklarni tashxislash va davolash qarorlarini boshqarish imkonini beradi. Ushbu maqola tibbiy tasvirlarning aniqligi va ishonchliligini baholashning muhim jihatlarini o'rganadi. Tibbiy tasvirlash usullarining sifati va izchilligini baholash bilan bog'liq asosiy usullar, ko'rsatkichlar va muammolarni o'rganiladi, optimal klinik natijalar uchun qat'iy baholash muhimligini ta'kidlaymiz.
title: Fatigue damage modeling of composite structures: the Onera viewpoint
Creators: name: Kaminski, Myriam
name: Laurin, Frederic
name: Maire, Jean-Francois
name: Rakotoarisoa, Carole
name: Hemon, Elen
Publisher: name: ONERA
Year: 2015
Subjects: FATIGUE
COMPOSITES
LIFE PREDICTION MODELS
DAMAGE MECHANISMS
S-N CURVES
RESIDUAL STRENGTH
RESIDUAL STIFFNESS
PROGRESSIVE DAMAGE MODEL
CONSTANT LIFE DIAGRAM

description: The aim of this paper is to present the fatigue damage modeling approach developed at Onera for the fatigue life prediction of composite materials and structures. This paper is divided into five sections. The first one explains why the already developed and validated methods for fatigue life modeling of metals and alloys cannot be directly applied to composite materials. Thus, the proposal of an efficient fatigue model for composite materials necessitates a good understanding of the specific damage mechanisms that occur under static and fatigue loadings of composites. These damage mechanisms are detailed in the second section. Then, the next section presents the different types of models reported in the literature; among them, the progressive damage models, to which special attention will be paid. Finally, structural simulations and constant-life diagrams will be considered in the last sections.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
title: Issues related to the constitutive modeling of Ni-based single crystal superalloys under aeroengine certification conditions
Creators: name: Cormier, Jonathan
name: Mauget, Florent
name: Le Graverend, Jean-Briac
name: Moriconi, Clara
name: Mendez, Jose
Publisher: name: ONERA
Year: 2015
Subjects: NI-BASED SINGLE CRYSTAL SUPERALLOYS
CREEP
CONSTITUTIVE MODELING
THERMOMECHANICAL LOADINGS
BURNER

description: This paper presents a constitutive modeling approach (the Polystar model) used to compute the viscoplastic behavior and the durability of high pressure turbine blades and vanes of aeroengines during complex thermomechanical histories typically encountered during certification procedures. This model is based on internal variables representing explicitly the microstructure evolutions occurring during very high temperature non-isothermal loading (e.g., dissolution/re-precipitation of the strengthening phase, dislocation recovery mechanisms, etc.) in a crystal viscoplasticity modeling framework. This article shows that the development of such a modeling tool requires a good characterization of fast microstructure evolutions, as well as in-service-type experiments (using burner rigs) able to reproduce the complex thermomechanical loading spectra. The capabilities of the model are illustrated, as well as its potential industrial applications and further developments are commented.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
Effect of noncircularity of experimental beam on CMB parameter estimation
Creators: name: Das, Santanu
name: Mitra, Sanjit
name: Paulson, Sonu Tabitha
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Measurement of Cosmic Microwave Background (CMB) anisotropies has been playing a lead role in precision cosmology by providing some of the tightest constrains on cosmological models and parameters. However, precision can only be meaningful when all major systematic effects are taken into account. Non-circular beams in CMB experiments can cause large systematic deviation in the angular power spectrum, not only by modifying the measurement at a given multipole, but also introducing coupling between different multipoles through a deterministic bias matrix. Here we add a mechanism for emulating the effect of a full bias matrix to the Planck likelihood code through the parameter estimation code SCoPE. We show that if the angular power spectrum was measured with a non-circular beam, the assumption of circular Gaussian beam or considering only the diagonal part of the bias matrix can lead to huge error in parameter estimation. We demonstrate that, at least for elliptical Gaussian beams, use of scalar beam window functions obtained via Monte Carlo simulations starting from a fiducial spectrum, as implemented in Planck analyses for example, leads to em only few percent of sigma deviation of the best-fit parameters. However, we notice more significant differences in the posterior distributions for some of the parameters, which would in turn lead to incorrect errorbars. These differences can be reduced, so that the errorbars match within few percent, by adding an iterative reanalysis step, where the beam window function would be recomputed using the best-fit spectrum estimated in the first step.
description: 13 pages, 4 figures
Dynamics and spectral theory of quasi-periodic Schrödinger-type operators
Creators: name: Jitomirskaya, S.
name: Marx, C. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Quasi-periodic Schrödinger-type operators naturally arise in solid state physics, describing the influence of an external magnetic field on the electrons of a crystal. In the late 1970s, numerical studies for the most prominent model, the almost Mathieu operator (AMO), produced the first example of a fractal in physics known as "Hofstadter's butterfly," marking the starting point for the ongoing strong interest in such operators in both mathematics (several of B. Simon's problems) and physics (e.g. Graphene, quantum Hall effect). Whereas research in the first three decades was focused mainly on unraveling the unusual properties of the AMO and operators with similar structure of potential, in recent years a combination of techniques from dynamical systems with those from spectral theory has allowed for a more "global," model-independent point of view. Intriguing phenomena first encountered for the AMO, notably the appearance of criticality corresponding to purely singular continuous spectrum for a measure theoretically typical realization of the phase, could be tested for prevalence in general models. The intention of this article is to survey the theory of quasi-periodic Schrödinger-type operators attaining this "global" view-point with an emphasis on dynamical aspects of the spectral theory of such operators.
title: Oneras multiaxial and anisothermal lifetime assessment for engine components
Creators: name: Kruch, Serge
name: Kanoute, Pascale
name: Bonnand, Vincent
Publisher: name: ONERA
Year: 2015
Subjects: VISCOPLASTICITY
THERMO-MECHANICAL FATIGUE
MULTIAXIALITY
AIRCRAFT ENGINES

description: This paper presents the calculation methods developed at Onera to assess the lifetime of aeroengine structures subjected to multiaxial thermo-mechanical loadings. The complexity of the steps required in this process has grown over the past years, in order to take advantage of extremely accurate observations in materials and more precise experimental results. The research activities in the field of fatigue are presented within a framework that covers microstructural observations, mechanical testing, the development of constitutive equations and fatigue damage models associated with numerical calculations. All of these steps are today closely interrelated in the complex analysis of lifetime predictions. A fundamental aspect is highlighted: the simultaneous consideration of multiaxial and anisothermal loadings, which requires specific developments. These points are detailed, illustrated by many examples of applications and positioned with respect to research works in the literature.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
Dynamo Effects Near The Transition from Solar to Anti-Solar Differential Rotation
Creators: name: Simitev, Radostin D.
name: Kosovichev, Alexander G.
name: Busse, Friedrich H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Numerical MHD simulations play increasingly important role for understanding mechanisms of stellar magnetism. We present simulations of convection and dynamos in density-stratified rotating spherical fluid shells. We employ a new 3D simulation code for the solution of a physically consistent anelastic model of the process with a minimum number of parameters. The reported dynamo simulations extend into a "buoyancy-dominated" regime where the buoyancy forcing is dominant while the Coriolis force is no longer balanced by pressure gradients and strong anti-solar differential rotation develops as a result. We find that the self-generated magnetic fields, despite being relatively weak, are able to reverse the direction of differential rotation from anti-solar to solar-like. We also find that convection flows in this regime are significantly stronger in the polar regions than in the equatorial region, leading to non-oscillatory dipole-dominated dynamo solutions, and to concentration of magnetic field in the polar regions. We observe that convection has different morphology in the inner and at the outer part of the convection zone simultaneously such that organized geostrophic convection columns are hidden below a near-surface layer of well-mixed highly-chaotic convection. While we focus the attention on the buoyancy-dominated regime, we also demonstrate that conical differential rotation profiles and persistent regular dynamo oscillations can be obtained in the parameter space of the rotation-dominated regime even within this minimal model.
description: Published in the Astrophysical Journal
Different Similarities
Creators: name: Kurilić, Miloš S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C07, 20M20, 06A06 (Primary), 03E40 (Secondary)

description: We establish the hierarchy among twelve equivalence relations (similarities) on the class of relational structures: the equality, the isomorphism, the equimorphism, the full relation, four similarities of structures induced by similarities of their self-embedding monoids and intersections of these equivalence relations. In particular, fixing a language $L$ and a cardinal $κ$, we consider the interplay between the restrictions of these similarities to the class $Mod _L (κ)$ of all $L$-structures of size $κ$. It turns out that, concerning the number of different similarities and the shape of the corresponding Hasse diagram, the class of all structures naturally splits into three parts: finite structures, infinite structures of unary languages, and infinite structures of non-unary languages (where all these similarities are different).
description: 23 pages
The dust and gas content of the Crab Nebula
Creators: name: Owen, P. J.
name: Barlow, M. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have constructed MOCASSIN photoionization plus dust radiative transfer models for the Crab Nebula core-collapse supernova (CCSN) remnant, using either smooth or clumped mass distributions, in order to determine the chemical composition and masses of the nebular gas and dust. We computed models for several different geometries suggested for the nebular matter distribution but found that the observed gas and dust spectra are relatively insensitive to these geometries, being determined mainly by the spectrum of the pulsar wind nebula which ionizes and heats the nebula. Smooth distribution models are ruled out since they require 16-49 Msun of gas to fit the integrated optical nebular line fluxes, whereas our clumped models re quire 7.0 Msun of gas. A global gas-phase C/O ratio of 1.65 by number is derived, along with a He/H number ratio of 1.85, neither of which can be matched by current CCSN yield predictions. A carbonaceous dust composition is favoured by the observed gas-phase C/O ratio: amorphous carbon clumped model fits to the Crab's Herschel and Spitzer infrared spectral energy distribution imply the presence of 0.18-0.27 Msun of dust, corresponding to a gas to dust mass ratio of 26-39. Mixed dust chemistry models can also be accommodated, comprising 0.11-0.13 Msun of amorphous carbon and 0.39-0.47 Msun of silicates. Power-law grain size distributions with mass distributions that are weighted towards the largest grain radii are derived, favouring their longer-term survival when they eventually interact with the interstellar medium. The total mass of gas plus dust in the Crab Nebula is 7.2 +/- 0.5 Msun, consistent with a progenitor star mass of 9 Msun.
description: Accepted in ApJ
title: Oxidation Assisted Intergranular Cracking in Alloy 718: Effects of Strain Rate and Temperature
Creators: name: Andrieu, Eric
name: Max, Bertrand
name: Viguiera, Bernard
Publisher: name: ONERA
Year: 2015
Subjects: ALLOY 718
OXIDATION ASSISTED INTERGRANULAR CRACKING
MECHANICAL-OXIDATION COUPLINGS
DYNAMIC STRAIN AGEING
CRACK INITIATION
CRACK PROPAGATION

description: Alloy 718 is the superalloy the most widely used in industry due to its excellent mechanical properties as well as oxidation and corrosion resistance in wide range of temperatures and solicitation modes. Nevertheless, it is a well known fact that this alloy is sensitive to oxidation assisted intergranular cracking under loading in the range of temperature met in service. Mechanisms resulting in such degradation are not well-understood, but it is well established that a relation exists between a change in fracture mode and the apparition of plastic instabilities phenomenon in a wide range of temperatures. Quantification and characterization of the damaging process provide important information leading to a better understanding of the degradation mechanisms involved in oxidation assisted intergranular cracking of this alloy. These observations allow to define different domains in the strain rates - temperature plane where the characteristics of damaging process are different: a domain of high strain rates / low temperature in which instabilities occur and where fracture mode is systematically transgranular ductile, an intermediary domain where numerous intergranular crack initiations can be observed, and a domain of slow strain rates / high temperature where crack propagation is enhanced. The present results lead to propose consistent scenarii to explain grain boundary opening due to the evolutions of applied intergranular normal stress and critical decohesion stress.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
REDES, COMPLEJIDAD Y ARQUEOLOGÍA: OTRA FORMA DE VER EL PASADO
Creators: name: Puerto, Joaquín Jimenez
Publisher: name: Zenodo
Year: 2022
Subjects: Redes, Social Network Analysis

description: Material elaborado para la práctica de introducción al marco de las Redes, la Complejidad y el Social Network Analysis en Arqueología.
title: Thermodynamic modeling by the CALPHAD method and its applications to innovative materials
Creators: name: Perrut, Mikael
Publisher: name: ONERA
Year: 2015
Subjects: PHASE DIAGRAM
CALPHAD
THERMODYNAMICS
MICROSTRUCTURE
MULTI-SCALE MODELING

description: Among the different steps leading to a multi-scale lifetime prediction for aero-engine components and other industrial components, one seems to be apart from the other mechanical engineering concerns: thermodynamic and microstructural modeling. Here is given an introduction to the CALPHAD method [19, 27], explaining how it actually models the thermodynamic properties of multicomponent systems. Then, a number of applications are described, while emphasizing the relevance of using the CALPHAD method for the purpose of developing integrated engineering methods. Finally, the importance of building thermodynamic databases creates a high need for the development of ab initio calculations, as well as high-throughput experiments and, generally speaking, combinatorial materials science.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
WorldFAIR Project (D1.1) Project Management Plan: Handbook (living document)
Creators: name: Molloy, Laura
Publisher: name: Zenodo
Year: 2022
Subjects: research data
FAIR data
data interoperability

description: Handbook containing the project management plan (Project Deliverable D1.1) for EC WIDERA-funded project "WorldFAIR: Global cooperation on FAIR data policy and practice". This handbook is a living document. New versions may be produced throughout the lifespan of the project and will be added to Zenodo as subsequent versions. Please ensure you have downloaded the most recent version to consult. Please visit WorldFAIR online at http://worldfair-project.eu. WorldFAIR is funded by the EC HORIZON-WIDERA-2021-ERA-01-41 Coordination and Support Action under Grant Agreement No. 101058393.
description: HORIZON-WIDERA-2021-ERA-01-41 HORIZON Coordination and Support Actions
title: Development of an Incremental Model for Fatigue Crack Growth Predictions
Creators: name: Pommier, Sylvie
Publisher: name: ONERA
Year: 2015
Subjects: FATIGUE
PLASTICITY
INCREMENTAL APPROACH

description: This paper presents an incremental approach for modeling fatigue crack growth with history effects. This approach is being developed at LMT since 2003, in collaboration with several industrial partners, mainly with Snecma, the SAFRAN Group, EDF and AREVA, and the SNCF. The first part of this paper presents the context, objectives and key assumptions on which the model is based. The second part presents some examples of applications of the model, fatigue crack growth under Mode I conditions, with variable amplitude loading; non-isothermal situations; crack growth under coupled environmental and fatigue loading conditions; extension of the model to non-proportional mixed mode loading conditions and to short cracks. The last part presents the ongoing work, the possible developments and the scientific challenges that remain to be overcome.
description: AerospaceLab Journal, Issue 9, June 2015; ISSN: 2107-6596
Medical Robot: A Veritable Tool for Medical Inspection in Mitigating the Spread of COVID-19 in Developing Countries
Creators: name: Erinle, Tunji John
name: Oladebeye, Dayo Hephzibah
name: Omotoso, Gbenga Simon
Publisher: name: Zenodo
Year: 2021
Subjects: COVID-19, Healthcare, Medical-Robot, Mitigate, Pandemic

description: COVID-19 is a severe pandemic disease which caused by a new strain of novel coronavirus. This disease need to be curb in
 order not to spread more than normal in the society and also the life of the medical personnel need to be protected from the untimely
 dead due to the deadly virus. What the developed countries employed to prevent the spread and protect the life of the medical
 personnel from this severe killer virus-disease should be embrace by the developing countries especially Africa continent. Robot is
 multifunctional automated machine designed to stimulate the function of a living entity which can performance variety of tasks. This paper reveals the importance of medical robot for healthcare as a veritable machine to be used in order to mitigate the spread of the novel coronavirus disease. Conclusively, medical robot is a vital healthcare equipment to improve the current standard of care in medical field in any developing country.
Transfer-matrix study of a hard-square lattice gas with two kinds of particles and density anomaly
Creators: name: Oliveira, T. J.
name: Stilck, J. F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using transfer matrix and finite-size scaling methods, we study the thermodynamic behavior of a lattice gas with two kinds of particles on the square lattice. Only excluded volume interactions are considered, so that the model is athermal. Large particles exclude the site they occupy and its four first neighbors, while small particles exclude only their site. Two thermodynamic phases are found: a disordered phase where large particles occupy both sublattices with the same probability and an ordered phase where one of the two sublattices is preferentially occupied by them. The transition between these phases is continuous at small concentrations of the small particles and discontinuous at larger concentrations, both transitions are separated by a tricritical point. Estimates of the central charge suggest that the critical line is in the Ising universality class, while the tricritical point has tricritical Ising (Blume-Emery-Griffiths) exponents. The isobaric curves of the total density as functions of the fugacity of small or large particles display a minimum in the disordered phase.
description: 9 pages, 7 figures and 4 tables
title: Plasmas for Aeronautics
Creators: name: Packan, Denis
name: Jonathan, Poggie
name: Thomas, McLaughlin
name: Sergey, Leonov
name: Doyle, Knight
name: Paul Quentin, Elias
name: Romain, Joussot
name: Sandra, Coumar
name: Viviana, Lago
name: Guillaume, Dufour
name: Francois, Rogier
name: Francois, Chedevergne
name: Gregoire, Casalis
name: Olivier, Leon
name: Maxime, Forte
name: Francois, Laurendeau
name: Natacha, Szulga
name: Olivier, Vermeersch
name: Estelle, Piot
name: Timothy, Ombrello
name: Nikolay, Popov
name: Konstantin, Savelkin
name: Dimitry, Yarantsev
name: Sabrina, Bentaleb
name: Nicole, Blin-Simiand
name: Pascal, Jeanney
name: Lionel, Magne
name: Nicolas, Moreau
name: Stephane, Pasquiers
name: Pierre, Tardiveau
Publisher: name: ONERA
Year: 2015
Subjects: PLASMAS
ELECTRICAL DISCHARGES
AERODYNAMICS
COMBUSTION
SUPERSONIC
SUBSONIC
DBD
ARCS

description: The 10th issue of Aerospace Lab is devoted to plasmas for aeronautics. The use of plasmas for aerodynamics and combustion has gained growing interest in the past 20 years, and a whole scientific community is now dedicated to this field of research. The content of this special issue reflects the diversity of the applications and of the physical conditions where plasmas are applied: from the subsonic to the supersonic regime, from combustion chambers to external aerodynamics, and from thermal plasmas to cold plasmas. Both experimental and modeling aspects are covered, as the complexity of the physics involved render the joint approach necessary. This issue will give the reader an overview of the current activities in this new field of research, and a glimpse of the numerous studies and applications of plasmas that are to come in aeronautics.
description: AerospaceLab Journal, Issue 10, December 2015; ISSN: 2107-6596
Plane thermonuclear detonation waves initiated by proton beams and quasi-one-dimensional model of fast ignition
Creators: name: Charakhch'yan, Alexander A.
name: Khishchenko, Konstantin V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The one-dimensional (1D) problem on bilatiral irradiation by proton beams of the plane layer of condensed DT mixture with length $2H$ and density $ρ_0 \leqslant 100ρ_s$, where $ρ_s$ is the fuel solid-state density at atmospheric pressure and temperature of 4 K, is considered. The proton kinetic energy is 1 MeV, the beam intensity is $10^{19}$ W/cm$^2$ and duration is 50 ps. A mathematical model is based on the one-fluid two-temperature hydrodynamics with a wide-range equation of state of the fuel, electron and ion heat conduction, DT fusion reaction kinetics, self-radiation of plasma and plasma heating by alpha-particles. If the ignition occurs, a plane detonation wave, which is adjacent to the front of the rarefaction wave, appears. Upon reflection of this detonation wave from the symmetry plane, the flow with the linear velocity profile along the spatial variable $x$ and with a weak dependence of the thermodynamic functions of $x$ occurs. An appropriate solution of the equations of hydrodynamics is found analytically up to an arbitrary constant, which can be chosen so that the analytical solution describes with good accuracy the numerical one. The gain with respect to the energy of neutrons $G\approx 200$ at $Hρ_0 \approx 1$ g/cm$^2$, and $G>2000$ at $Hρ_0 \approx 5$ g/cm$^2$. To evaluate the ignition energy $E_{\mathrm{ig}}$ of cylindrical targets, the quasi-1D model, limiting trajectories of $α$-particles by a cylinder of a given radius, is suggested. The model reproduces the known theoretical dependence $E_{\mathrm{ig}} \sim ρ_0^{-2}$ and gives $E_{\mathrm{ig}} = 160$ kJ for $ρ_0 = 100ρ_s \approx 22$ g/cm$^3$.
description: 26 pages, 3 tables, 7 figures
Conservação Sustentável Do Parque Nacional Da Amazônia: Protegendo O Patrimônio Cultural E Ambiental
Creators: name: Ana Luiza Castro de Matos
Publisher: name: Zenodo
Year: 2024

description: Conservar um patrimônio natural envolve proteger áreas ecológicas, culturais e paisagísticas. O Parque Nacional da Amazônia, em Itaituba, Pará, é importante para essa preservação, cobrindo uma vasta floresta tropical, essencial para os ecossistemas e comunidades locais.Este trabalho visa explorar a trajetória histórica do Parque Nacional da Amazônia, resgatar sua origem e destacar a importância da conservação do patrimônio cultural e ambiental. Serão propostas soluções sustentáveis e enfatizada a necessidade de valorizar a herança local.As informações sobre o Parque Nacional da Amazônia foram obtidas por pesquisa no Google Acadêmico e no site Google, utilizando os descritores “Patrimônios naturais em Itaituba” e “Parque Nacional da Amazônia no Pará” no primeiro, e “Parque Nacional da Amazônia história” no segundo.Criado em 1974, o Parque Nacional da Amazônia é o primeiro da Amazônia brasileira, localizado ao longo do rio Tapajós, em Itaituba e Aveiro, Pará. Serve como corredor ecológico entre os rios Tapajós e Madeira, abrigando fauna, flora, montanhas, grupos indígenas e sítios arqueológicos. Integrar conservação ambiental com o fortalecimento da identidade local possibilita a restauração de ecossistemas, incluindo replantio de espécies nativas e remoção de invasoras. Também é crucial monitorar e proteger sítios arqueológicos e aplicar práticas de conservação.O Parque Nacional da Amazônia é um exemplo de patrimônio natural e cultural na Amazônia brasileira. Desempenha um papel vital na preservação ambiental e proteção dos ecossistemas. O parque integra conservação ambiental e preservação cultural, destacando a importância da biodiversidade global e da herança local. Valorizá-lo é crucial para as próximas gerações.
Virial tests for post-Newtonian stationary black-hole-disk systems
Creators: name: Jaranowski, Piotr
name: Mach, Patryk
name: Malec, Edward
name: Pirog, Michal
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigated hydrodynamical post-Newtonian models of selfgravitating stationary black-hole-disk systems. The post-Newtonian scheme presented here and also in our recent paper is a continuation of previous, purely Newtonian studies of selfgravitating hydrodynamical disks rotating according to the Keplerian rotation law. The post-Newtonian relativistic corrections are significant even at the 1PN level. The 1PN correction to the angular velocity can be of the order of 10% of its Newtonian value. It can be expressed as a combination of geometric and hydrodynamical terms. Moreover, in contrast to the Newtonian Poincare-Wavre theorem, it depends both on the distance from the rotation axis and the distance from the equatorial plane.
description: 6 pages, a talk given at The Spanish Relativity Meeting (Encuentros Realtivistas Espanoles - ERE), Valencia, 2014
title: Plasmas for Aeronautics
Creators: name: Packan, Denis
Publisher: name: ONERA
Year: 2015
Subjects: PLASMAS
ELECTRICAL DISCHARGES
AERODYNAMICS
COMBUSTION
SUPERSONIC
SUBSONIC
DBD
ARCS

description: The potential of plasmas for aerodynamics and combustion has been known for
many years, but a dedicated research domain has only started to significantly
develop over the past 20 years (Ref. [1]). Based either on new technological
advances, on enhanced numerical capabilities, or on new needs created by the
aeronautical industrys quest for higher performance, the development of plasma
actuators has now reached a point where an industrial application is within grasp.
This tenth issue of the Aerospace Lab journal will present an overview of the
research in this field. Due to the great diversity of the plasmas and of the applications
studied in laboratories around the world, this overview is necessarily limited in
its scope, but the main research areas will nevertheless be illustrated.
description: AerospaceLab Journal, Issue 10, December 2015; ISSN: 2107-6596
Conservação Sustentável do Parque Nacional da Amazônia: Protegendo o Patrimônio Cultural e Ambiental
Creators: name: Ana Luiza Castro de Matos
Publisher: name: Zenodo
Year: 2024

description: Conservar um patrimônio natural envolve proteger áreas ecológicas, culturais e paisagísticas. O Parque Nacional da Amazônia, em Itaituba, Pará, é importante para essa preservação, cobrindo uma vasta floresta tropical, essencial para os ecossistemas e comunidades locais.Este trabalho visa explorar a trajetória histórica do Parque Nacional da Amazônia, resgatar sua origem e destacar a importância da conservação do patrimônio cultural e ambiental. Serão propostas soluções sustentáveis e enfatizada a necessidade de valorizar a herança local.As informações sobre o Parque Nacional da Amazônia foram obtidas por pesquisa no Google Acadêmico e no site Google, utilizando os descritores “Patrimônios naturais em Itaituba” e “Parque Nacional da Amazônia no Pará” no primeiro, e “Parque Nacional da Amazônia história” no segundo.Criado em 1974, o Parque Nacional da Amazônia é o primeiro da Amazônia brasileira, localizado ao longo do rio Tapajós, em Itaituba e Aveiro, Pará. Serve como corredor ecológico entre os rios Tapajós e Madeira, abrigando fauna, flora, montanhas, grupos indígenas e sítios arqueológicos. Integrar conservação ambiental com o fortalecimento da identidade local possibilita a restauração de ecossistemas, incluindo replantio de espécies nativas e remoção de invasoras. Também é crucial monitorar e proteger sítios arqueológicos e aplicar práticas de conservação.O Parque Nacional da Amazônia é um exemplo de patrimônio natural e cultural na Amazônia brasileira. Desempenha um papel vital na preservação ambiental e proteção dos ecossistemas. O parque integra conservação ambiental e preservação cultural, destacando a importância da biodiversidade global e da herança local. Valorizá-lo é crucial para as próximas gerações.
title: Plasma Aerodynamics : Current Status and Future Directions
Creators: name: Jonathan, Poggie
name: Thomas, McLaughlin
name: Sergey, Leonov
Publisher: name: ONERA
Year: 2015

description: Plasma aerodynamics can trace its origin to the beginning of the space age, and in
particular to a time when designers realized that plasmas could have a significant
influence on reentry flows. From the 1950s to the 1970s, there was considerable work
on magnetohydrodynamic reentry systems and related technology. The recent resurgence
in the field was stimulated by the disclosure of the Soviet AJAX vehicle concept
in the mid-1990s. This led to an extraordinary international collaboration that has now
lasted almost twenty years. Plasma-based flow control seems quite feasible, particularly
for local flow control applications where power consumption is low. Plasma-based
devices have a low profile, and can provide actuation over short time scales. Plasmaenhanced
combustion is a very promising area for both low- and high-speed regimes.
Discharges are already being used to break down fuels, enhance ignition, provide
flameholding, and promote combustion efficiency. There are a number of potential
breakthrough areas in the field that could have strong technological impact on the
aerospace industry. Industry seems to be receptive to the adoption of plasma-based
technology, but has reservations about technical risk, performance, reliability, and integration.
There is a need to identify applications where plasma devices are significantly
better than completing technologies, and to demonstrate prototypes in an operational
environment. With a century of atmospheric flight and half a century of spaceflight behind
us, the aerospace sciences remain a vigorous and exciting field. The new field of
plasma aerodynamics contributes to this excitement, and supports diverse aerospace
technology needs, from energy efficiency to space access.
description: AerospaceLab Journal, Issue 10, December 2015; ISSN: 2107-6596
Energies of GRB blast waves and prompt efficiencies as implied by modeling of X-ray and GeV afterglows
Creators: name: Beniamini, Paz
name: Nava, Lara
name: Duran, Rodolfo Barniol
name: Piran, Tsvi
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider a sample of ten GRBs with long lasting ($\gtrsim10^2\rm\,sec$) emission detected by Fermi/LAT and for which X-ray data around $1\,$day are also available. We assume that both the X-rays and the GeV emission are produced by electrons accelerated at the external forward shock, and show that the X-ray and the GeV fluxes lead to very different estimates of the initial kinetic energy of the blast wave. The energy estimated from GeV is on average $\sim50$ times larger than the one estimated from X-rays. We model the data (accounting also for optical detections around $1\,$day, if available) to unveil the reason for this discrepancy and find that good modelling within the forward shock model is always possible and leads to two possibilities: either the X-ray emitting electrons (unlike the GeV emitting electrons) are in the slow cooling regime or ii) the X-ray synchrotron flux is strongly suppressed by Compton cooling, whereas, due to the Klein-Nishina suppression, this effect is much smaller at GeV energies. In both cases the X-ray flux is no longer a robust proxy for the blast wave kinetic energy. On average, both cases require weak magnetic fields ($10^{-6}\lesssim ε_B \lesssim 10^{-3}$) and relatively large isotropic kinetic blast wave energies $10^{53}\rm\,erg
description: 14 pages, 7 figures. Accepted for publication in MNRAS
COMPLEJIDAD Y ARQUEOLOGÍA: MODELOS, OTRA FORMA DE VER EL PASADO
Creators: name: Jiménez-Puerto, Joaquín
Publisher: name: Zenodo
Year: 2022
Subjects: Modelos computacionales, Arqueología

description: Material docente de la asignatura Prehistoria de la Península Ibérica en el grado de Historia de la Universidad de Valencia. Descripción del paradigma de los modelos computacionales aplicado a la investigación arqueológica.
title: A Short Review of Microwave and Laser Discharges for Supersonic Flow Control
Creators: name: Doyle, Knight
Publisher: name: ONERA
Year: 2015
Subjects: MICROWAVE DISCHARGE
LASER DISCHARGE
SUPERSONIC
FLOW CONTROL
DRAG REDUCTION

description: Energy deposition by electromagnetic discharge (e.g., arc, laser, microwave) is
an emerging field of research in flow and flight control. Major advantages of this
approach include fast response time, capability for customization of discharge, and offbody
modification of the flow. Recent computational and experimental research in energy
deposition are described and future needs identified.
description: AerospaceLab Journal, Issue 10, December 2015; ISSN: 2107-6596
Conservação sustentável do parque nacional da Amazônia: protegendo o patrimônio cultural e ambiental
Creators: name: Castro de Matos, Ana Luiza
Publisher: name: Zenodo
Year: 2024

description: Conservar um patrimônio natural envolve proteger áreas ecológicas, culturais e paisagísticas. O Parque Nacional da Amazônia, em Itaituba, Pará, é importante para essa preservação, cobrindo uma vasta floresta tropical, essencial para os ecossistemas e comunidades locais.Este trabalho visa explorar a trajetória histórica do Parque Nacional da Amazônia, resgatar sua origem e destacar a importância da conservação do patrimônio cultural e ambiental. Serão propostas soluções sustentáveis e enfatizada a necessidade de valorizar a herança local.As informações sobre o Parque Nacional da Amazônia foram obtidas por pesquisa no Google Acadêmico e no site Google, utilizando os descritores “Patrimônios naturais em Itaituba” e “Parque Nacional da Amazônia no Pará” no primeiro, e “Parque Nacional da Amazônia história” no segundo.Criado em 1974, o Parque Nacional da Amazônia é o primeiro da Amazônia brasileira, localizado ao longo do rio Tapajós, em Itaituba e Aveiro, Pará. Serve como corredor ecológico entre os rios Tapajós e Madeira, abrigando fauna, flora, montanhas, grupos indígenas e sítios arqueológicos. Integrar conservação ambiental com o fortalecimento da identidade local possibilita a restauração de ecossistemas, incluindo replantio de espécies nativas e remoção de invasoras. Também é crucial monitorar e proteger sítios arqueológicos e aplicar práticas de conservação.O Parque Nacional da Amazônia é um exemplo de patrimônio natural e cultural na Amazônia brasileira. Desempenha um papel vital na preservação ambiental e proteção dos ecossistemas. O parque integra conservação ambiental e preservação cultural, destacando a importância da biodiversidade global e da herança local. Valorizá-lo é crucial para as próximas gerações.
Energy Harvesting: Synthetic Use of Recovered Energy in Electrochemical Late-Stage Functionalization
Creators: name: Karl, Tobias A.
name: Seidl, Max
name: König, Burkhard
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: Electrochemistry · Energy harvesting · Late-stage functionalization · Radicals · Self-sustaining
subject: 540 Chemie

description: An induction-based energy harvesting (EH) device was presented. It converted part of the rotational energy of magnetic stirrers back into electrical energy, making it accessible for electrochemical transformations. After rectification, the induced AC voltage was optionally provided as a constant voltage or constant current whereby the available voltage could directly be adjusted by the stirring rate of the reaction. The comparability of the results with reactions carried out with commercial power supplies has been demonstrated on six different late-stage functionalization, including methylation, carboxylation, trifluoromethylation, imidation, hydrolysis, and keto-olefin coupling. Therefore, the described EH device is a low-cost, resource-efficient alternative to a commercial electrochemical set-up and enables laboratories without specialized equipment to perform electrochemical reactions.
MODELADO COMPUTACIONAL EN ARQUEOLOGÍA: MODELOS, OTRA FORMA DE VER EL PASADO
Creators: name: Jiménez-Puerto, Joaquín
Publisher: name: Zenodo
Year: 2022
Subjects: Modelos computacionales, Arqueología

description: Material docente de la asignatura Prehistoria de la Península Ibérica en el grado de Historia de la Universidad de Valencia. Descripción del paradigma de los modelos computacionales aplicado a la investigación arqueológica.
Conservação sustentável do parque nacional da Amazônia: protegendo o patrimônio cultural e ambiental
Creators: name: Ana Luiza Castro de Matos
Publisher: name: Zenodo
Year: 2024

description: Conservar um patrimônio natural envolve proteger áreas ecológicas, culturais e paisagísticas. O Parque Nacional da Amazônia, em Itaituba, Pará, é importante para essa preservação, cobrindo uma vasta floresta tropical, essencial para os ecossistemas e comunidades locais.Este trabalho visa explorar a trajetória histórica do Parque Nacional da Amazônia, resgatar sua origem e destacar a importância da conservação do patrimônio cultural e ambiental. Serão propostas soluções sustentáveis e enfatizada a necessidade de valorizar a herança local.As informações sobre o Parque Nacional da Amazônia foram obtidas por pesquisa no Google Acadêmico e no site Google, utilizando os descritores “Patrimônios naturais em Itaituba” e “Parque Nacional da Amazônia no Pará” no primeiro, e “Parque Nacional da Amazônia história” no segundo.Criado em 1974, o Parque Nacional da Amazônia é o primeiro da Amazônia brasileira, localizado ao longo do rio Tapajós, em Itaituba e Aveiro, Pará. Serve como corredor ecológico entre os rios Tapajós e Madeira, abrigando fauna, flora, montanhas, grupos indígenas e sítios arqueológicos. Integrar conservação ambiental com o fortalecimento da identidade local possibilita a restauração de ecossistemas, incluindo replantio de espécies nativas e remoção de invasoras. Também é crucial monitorar e proteger sítios arqueológicos e aplicar práticas de conservação.O Parque Nacional da Amazônia é um exemplo de patrimônio natural e cultural na Amazônia brasileira. Desempenha um papel vital na preservação ambiental e proteção dos ecossistemas. O parque integra conservação ambiental e preservação cultural, destacando a importância da biodiversidade global e da herança local. Valorizá-lo é crucial para as próximas gerações.
The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through citizen science
Creators: name: Geach, J. E.
name: More, A.
name: Verma, A.
name: Marshall, P. J.
name: Jackson, N.
name: Belles, P. -E.
name: Beswick, R.
name: Baeten, E.
name: Chavez, M.
name: Cornen, C.
name: Cox, B. E.
name: Erben, T.
name: Erickson, N. J.
name: Garrington, S.
name: Harrison, P. A.
name: Harrington, K.
name: Hughes, D. H.
name: Ivison, R. J.
name: Jordan, C.
name: Lin, Y. -T.
name: Leauthaud, A.
name: Lintott, C.
name: Lynn, S.
name: Kapadia, A.
name: Kneib, J. -P.
name: Macmillan, C.
name: Makler, M.
name: Miller, G.
name: Montana, A.
name: Mujica, R.
name: Muxlow, T.
name: Narayanan, G.
name: Briain, D. O
name: O'Brien, T.
name: Oguri, M.
name: Paget, E.
name: Parrish, M.
name: Ross, N. P.
name: Rozo, E.
name: Rusu, E.
name: Rykoff, E. S.
name: Sanchez-Arguelles, D.
name: Simpson, R.
name: Snyder, C.
name: Schloerb, F. P.
name: Tecza, M.
name: Van Waerbeke, L.
name: Wilcox, J.
name: Viero, M.
name: Wilson, G. W.
name: Yun, M. S.
name: Zeballos, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (L_IR~10^13 L_sun) with strong radio emission (L_1.4GHz~10^25 W/Hz) at z=2.553. The source was identified in the citizen science project SpaceWarps through the visual inspection of tens of thousands of iJKs colour composite images of Luminous Red Galaxies (LRGs), groups and clusters of galaxies and quasars. Appearing as a partial Einstein ring (r_e~3") around an LRG at z=0.2, the galaxy is extremely bright in the sub-millimetre for a cosmological source, with the thermal dust emission approaching 1 Jy at peak. The redshift of the lensed galaxy is determined through the detection of the CO(3-2) molecular emission line with the Large Millimetre Telescope's Redshift Search Receiver and through [OIII] and H-alpha line detections in the near-infrared from Subaru/IRCS. We have resolved the radio emission with high resolution (300-400 mas) eMERLIN L-band and JVLA C-band imaging. These observations are used in combination with the near-infrared imaging to construct a lens model, which indicates a lensing magnification of ~10x. The source reconstruction appears to support a radio morphology comprised of a compact (<250 pc) core and more extended component, perhaps indicative of an active nucleus and jet or lobe.
description: 9 pages, 7 figures, published in MNRAS
title: Numerical Simulations on the Effect and Efficiency of Long Linear Energy Deposition Ahead of a Supersonic Blunt Body: Toward a Laser Spike
Creators: name: Paul Quentin, Elias
Publisher: name: ONERA
Year: 2015
Subjects: SIMULATION
DEPOT D'ENERGIE
FEMTOSECONDE
SUPERSONIQUE
REDUCTION DE TRAINEE
PERCHE
ACTIONNEUR
ENERGY DEPOSITION
SUPERSONIC
DRAG REDUCTION
SPIKE
ACTUATOR

description: The effect of single or repetitive linear energy depositions in front of a supersonic
blunt body is computed using the CEDRE flow solver. The CFD Code models the
effect of a laser-induced energy deposition, as obtained for example using the long
filaments created by a femtosecond laser. Single energy depositions show that significant
transient drag reductions are obtained, due to the interaction of the heated core,
created by the energy release, with the bow shock. When the deposition is repeated,
cumulative effects are important and quasi-steady or unsteady flow regimes are obtained,
depending on the power and repetition frequency. This behavior is similar to that
obtained with supersonic spiked blunt bodies, acting like a laser spike. This system
can lead to 15%-20% fuel savings, depending on the energy deposition efficiency.
description: AerospaceLab Journal, Issue 10, December 2015; ISSN: 2107-6596