cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Harmonic Singular Integrals and Steerable Wavelets in $L_2(\mathbb{R}^d)$
Creators: name: Ward, John Paul
name: Unser, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42C40, 42b20

description: Here we present a method of constructing steerable wavelet frames in $L_2(\mathbb{R}^d)$ that generalizes and unifies previous approaches, including Simoncelli's pyramid and Riesz wavelets. The motivation for steerable wavelets is the need to more accurately account for the orientation of data. Such wavelets can be constructed by decomposing an isotropic mother wavelet into a finite collection of oriented mother wavelets. The key to this construction is that the angular decomposition is an isometry, whereby the new collection of wavelets maintains the frame bounds of the original one. The general method that we propose here is based on partitions of unity involving spherical harmonics. A fundamental aspect of this construction is that Fourier multipliers composed of spherical harmonics correspond to singular integrals in the spatial domain. Such transforms have been studied extensively in the field of harmonic analysis, and we take advantage of this wealth of knowledge to make the proposed construction practically feasible and computationally efficient.
description: 27 pages, 2 figures
Representations and module-extensions of hom 3-Lie algebras
Creators: name: Liu, Yan
name: Chen, Liangyun
name: Ma, Yao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B99, 17B30

description: In this paper, we study the representations and module-extensions of hom 3-Lie algebras. We show that a linear map between hom 3-Lie algebras is a morphism if and only if its graph is a hom 3-Lie subalgebra and show that the derivations of a hom 3-Lie algebra is a Lie algebra. Derivation extension of hom 3-Lie algebras are also studied as an application. Moreover, we introduce the definition of $T_θ$-extensions and $T^{*}_θ$-extensions of hom 3-Lie sub-algebras in terms of modules, provide the necessary and sufficient conditions for $2k$-dimensional metric hom 3-Lie algebra to be isomorphic to a $T^{*}_θ$-extensions.
description: arXiv admin note: substantial text overlap with arXiv:1005.0140 by other authors
title: Conectando as exportações da soja brasileira ao desmatamento
Creators: name: Reis, Tiago
name: Moro, Yan Prada
Publisher: name: Trase
Year: 2022
Subjects: subject: FOS: Earth and related environmental sciences
valueUri: http://www.oecd.org/science/inno/38235147.pdf
subject: FOS: Agriculture, forestry, and fisheries
valueUri: http://www.oecd.org/science/inno/38235147.pdf
subject: FOS: Economics and business
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Embora a taxa de desmatamento e conversão de terra impulsionada pela expansão da produção de soja no Brasil tenha desacelerado, a Amazônia e o Cerrado continuam sendo desmatados apesar dos compromissos de desmatamento zero feitos por comerciantes de soja, de acordo com os dados da Trase de 2019-2020. A remoção da vegetação nos campos dos Pampas está acelerando para atender à crescente demanda por soja, inclusive da China.
title: РАЗРАБОТКА ЖЕВАТЕЛЬНЫХ ПАСТИЛОК С ЭКСТРАКТОМ ПЛОДОВ ШИПОВНИКА
Creators: name: Петрова, А.
name: Жезняковская, Л.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Представлена разработка пастилок жевательных с экстрактом шиповника, содержащего аскорбиновую кислоту. Лучшим выбран состав, содержащий вспомогательные вещества: сахароза, сухое молоко, масло какао.
Strain engineering of magnetic states of vacancy-decorated hexagonal boron nitride
Creators: name: Ouyang, Bin
name: Song, Jun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Novel materials with tunable magnetic states play a significant role in the development of next-generation spintronic devices. In this paper, we examine the role of biaxial strain on the electronic properties of vacancy-decorated hexagonal boron nitride (h-BN) monolayers using density functional theory calculations. We found that the strain can lead to switching of the magnetic state for h-BN monolayers with boron vacancy or divacancy. Our findings promise a new route for the operation of low-dimensional spintronic devices.
description: 13 pages, 3 figures
title: Giuseppe Sardi. Architetto e Capomastro nel territorio romano del XVIII secolo
Creators: name: Formosa, Marta
name: De Giusti, Gilberto
Publisher: name: Sapienza Università Editrice
Year: 2022

description: Il volume si propone di offrire un primo quadro d’insieme dell’opera di Giuseppe Sardi (1688-1770), attivo nella duplice qualifica di architetto e capomastro nel territorio di Roma e dei suoi dintorni del primo Settecento. A partire dalla bibliografia consolidata, e in particolare dai significativi studi di Sandro Benedetti e di Paolo Portoghesi, è presentata un’analisi delle architetture di Sardi, supportata dall’approfondimento archivistico e dall’osservazione diretta, potendo aggiungere, in taluni casi, delle conoscenze inedite.

Il ripercorrere l’attività di Sardi come architetto ne mette in luce il lessico spaziale-decorativo nel contesto culturale del primo Settecento a Roma, in cui oltre alla scuola di Carlo Fontana è ancora viva l’eco delle esperienze dei maggiori maestri barocchi e dei loro epigoni. Nelle sue opere Sardi adotta la tipologia a impianto centrale, coperta a cupola, in cui la decorazione in stucco è il veicolo dei significati simbolico-religiosi e lo strumento per la narrazione teologico-sacrale.

Nel volume, è inoltre delineata l’attività di Sardi in qualità di capomastro e collaboratore di altri importanti architetti del Settecento romano.
FreeMe project - 3rd Press Release
Creators: name: EXELISISPC
Publisher: name: Zenodo
Year: 2023
Subjects: dissemination
press release
Horizon Europe
plating
plastics
plating on plastics
coating
nickel
chromium
safe
sustainable
SSbD
DST
automotive
aerospace
home aplliances
FreeMe

description: A note from the Decision Support Tools developer of FreeMe
A Combined VLT and Gemini Study of the Atmosphere of the Directly-Imaged Planet, beta Pictoris b
Creators: name: Currie, Thayne
name: Burrows, Adam
name: Madhusudhan, Nikku
name: Fukagawa, Misato
name: Girard, Julien H.
name: Dawson, Rebekah
name: Murray-Clay, Ruth
name: Kenyon, Scott
name: Kuchner, Marc
name: Matsumura, Soko
name: Jayawardhana, Ray
name: Chambers, John
name: Bromley, Ben
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze new/archival VLT/NaCo and Gemini/NICI high-contrast imaging of the young, self-luminous planet $β$ Pictoris b in seven near-to-mid IR photometric filters, using advanced image processing methods to achieve high signal-to-noise, high precision measurements. While $β$ Pic b's near-IR colors mimick that of a standard, cloudy early-to-mid L dwarf, it is overluminous in the mid-infrared compared to the field L/T dwarf sequence. Few substellar/planet-mass objects -- i.e. $κ$ And b and 1RXJ 1609B -- match $β$ Pic b's $JHK_{s}L^\prime$ photometry, and its 3.1 $μm$ and 5 $μm$ photometry are particularly difficult to reproduce. Atmosphere models adopting cloud prescriptions and large ($\sim$ 60 $μm$) dust grains fail to reproduce the $β$ Pic b spectrum. However, models incorporating thick clouds similar to those found for HR 8799 bcde but also with small (a few microns) modal particle sizes yield fits consistent with the data within uncertainties. Assuming solar abundance models, thick clouds, and small dust particles ($$ = 4 $μm$) we derive atmosphere parameters of log(g) = 3.8 $\pm$ 0.2 and $T_{eff}$ = 1575--1650 $K$, an inferred mass of 7$^{+4}_{-3}$ $M_{J}$, and a luminosity of log(L/L$_{\odot}$) $\sim$ -3.80 $\pm$ 0.02. The best-estimated planet radius, $\approx$ 1.65 $\pm$ 0.06 $R_{J}$, is near the upper end of allowable planet radii for hot-start models given the host star's age and likely reflects challenges with constructing accurate atmospheric models. Alternatively, these radii are comfortably consistent with hot-start model predictions if $β$ Pic b is younger than $\approx$ 7 Myr, consistent with a late formation, well after its host star's birth $\sim$ 12$^{+8}_{-4}$ Myr ago.
description: 24 pages, minor changes from previous version, Accepted for publication in ApJ
From creeping to inertial flow in porous media: a lattice Boltzmann - Finite Element study
Creators: name: Narváez, Ariel
name: Yazdchi, Kazem
name: Luding, Stefan
name: Harting, Jens
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The lattice Boltzmann method has been successfully applied for the simulation of flow through porous media in the creeping regime. Its technical properties, namely discretization, straightforward implementation and parallelization, are responsible for its popularity. However, flow through porous media is not restricted to near zero Reynolds numbers since inertial effects play a role in numerous natural and industrial processes. In this paper we investigate the capability of the lattice Boltzmann method to correctly describe flow in porous media at moderate Reynolds numbers. The selection of the lattice resolution, the collision kernel and the boundary conditions becomes increasingly important and the challenge is to keep artifacts due to compressibility effects at a minimum. The lattice Boltzmann results show an accurate quantitative agreement with Finite Element Method results and evidence the capability of the method to reproduce Darcy's law at low Reynolds numbers and Forchheimer's law at high Reynolds numbers.
description: 9 pages, 7 figures
EOR Screening Using Fuzzy Logic Methodology
Creators: name: Sebaa, Moustafa
name: Chikh, Salah
name: Deghmoum, Abdelhakim
Publisher: name: figshare
Year: 2021
Subjects: subject: 91406 Petroleum and Reservoir Engineering
subject: FOS: Environmental engineering
subject: 170202 Decision Making
subject: FOS: Psychology
subject: 80108 Neural, Evolutionary and Fuzzy Computation
subject: FOS: Computer and information sciences

description: Big reserves discoveries are decreasing or sometimes impossible, and if possible, it may never be as big as remaining oil in mature fields. This fact makes the need for considering EOR techniques to recover more oil from existing oil reservoirs in order to meet future energy demands. Making the right selection when it depends to applying EOR techniques is crucial. There are a number of different choices in this regard, including chemical methods, miscible and immiscible gas flooding, and thermal recovery methods. The correct choice of EOR strategy goes a long way toward optimizing eventual recovery, and reduces many risks. The purpose of this work is to provide a solution to select an efficient EOR process and investigate its comfort zone parameters. A database of reservoir parameters of rock and fluid properties along with different EOR techniques has been collected and analyzed. A fuzzy logic methodology is developed to automate the selection process and improve decision making. This concept clearly makes saving in time and cost, and reduce the final decision making risk. The results show that FL system can select proper EOR methods.
Vacuum condensates, flavor mixing and spontaneous supersymmetry breaking
Creators: name: Capolupo, Antonio
name: Di Mauro, Marco
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Spontaneous supersymmetry (SUSY) breaking is revealed in all phenomena in which vacuum condensates are physically relevant. The dynamical breakdown of SUSY is generated by the condensates themselves, which lift the zero point energy. Evidence is presented in the case of the Wess-Zuimino model, and the flavor mixing case is treated in detail.
description: 5 pages
Realization of Deterministic Quantum Teleportation with Solid State Qubits
Creators: name: Steffen, L.
name: Fedorov, A.
name: Oppliger, M.
name: Salathe, Y.
name: Kurpiers, P.
name: Baur, M.
name: Puebla-Hellmann, G.
name: Eichler, C.
name: Wallraff, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Transferring the state of an information carrier from a sender to a receiver is an essential primitive in both classical and quantum communication and information processing. In a quantum process known as teleportation the unknown state of a quantum bit can be relayed to a distant party using shared entanglement and classical information. Here we present experiments in a solid-state system based on superconducting quantum circuits demonstrating the teleportation of the state of a qubit at the macroscopic scale. In our experiments teleportation is realized deterministically with high efficiency and achieves a high rate of transferred qubit states. This constitutes a significant step towards the realization of repeaters for quantum communication at microwave frequencies and broadens the tool set for quantum information processing with superconducting circuits.
description: 8 pages, 6 figures
On the cohomology and extensions of first-class $n$-Lie superalgebras
Creators: name: Ma, Yao
name: Chen, Liangyun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: An $n$-Lie superalgebra of parity 0 is called a first-class $n$-Lie superalgebra. In this paper, we give the representation and cohomology for a first-class $n$-Lie superalgebra and obtain a relation between extensions of a first-class $n$-Lie superalgebra $\mathfrak{b}$ by an abelian one $\mathfrak{a}$ and $Z^1(\mathfrak{b}, \mathfrak{a})_{\bar{0}}$. We also introduce the notion of $T^*$-extensions of first-class $n$-Lie superalgebras and prove that every finite-dimensional nilpotent metric first-class $n$-Lie superalgebra $(\g,< ,>_{\g})$ over an algebraically closed field of characteristic not 2 is isometric to a suitable $T^*$-extension.
PAX6 disease models for aniridia.
Creators: name: Abdolkarimi, Dorsa
name: Cunha, Dulce Lima
name: Lahne, Manuela
name: Moosajee, Mariya
Publisher: name: The Francis Crick Institute
Year: 2022
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine
subject: Model organisms
subject: Gene Expression
subject: Genetics & Genomics
subject: Developmental Biology
subject: Human Biology & Physiology
subject: Stem Cells

description: Aniridia is a pan-ocular genetic developmental eye disorder characterized by complete or partial iris and foveal hypoplasia, for which there is no treatment currently. Progressive sight loss can arise from cataracts, glaucoma, and aniridia-related keratopathy, which can be managed conservatively or through surgical intervention. The vast majority of patients harbor heterozygous mutations involving the PAX6 gene, which is considered the master transcription factor of early eye development. Over the past decades, several disease models have been investigated to gain a better understanding of the molecular pathophysiology, including several mouse and zebrafish strains and, more recently, human-induced pluripotent stem cells (hiPSCs) derived from aniridia patients. The latter provides a more faithful cellular system to study early human eye development. This review outlines the main aniridia-related animal and cellular models used to study aniridia and highlights the key discoveries that are bringing us closer to a therapy for patients.
EGI-ACE D2.1 Communication and engagement plan
Creators: name: Sokartara, Dimple
name: La Rocca, Giuseppe
name: Andreozzi, Sergio
name: Sipos, Gergely
Publisher: name: Zenodo
Year: 2021
Subjects: engagement
communication

description: EGI-ACE is a 30-month project coordinated by the EGI Foundation with a mission to empower researchers from all disciplines to collaborate in data- and compute-intensive research through free-at-point-of-use services. Building on the distributed computing integration in the EOSC-hub project, EGI-ACE will deliver the EOSC Compute Platform and will contribute to the EOSC Data Commons through a federation of cloud compute and storage facilities, PaaS services and data spaces with analytics tools and federated access services. In this document, all communications and engagement plans will be described, with the related activities and expected results.
The NMSSM with F-theory unified boundary conditions
Creators: name: Aparicio, L.
name: Camara, P. G.
name: Cerdeno, D. G.
name: Ibanez, L. E.
name: Valenzuela, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the phenomenological viability of a constrained NMSSM with parameters subject to unified boundary conditions from F-theory GUTs. We find that very simple assumptions about modulus dominance SUSY breaking in F-theory unification lead to a predictive set of boundary conditions, consistent with all phenomenological constraints. The second lightest scalar Higgs H_2 can get a mass m_{H_2} ~ 125 GeV and has properties similar to the SM Higgs. On the other hand the lightest scalar H_1, with a dominant singlet component, would have barely escaped detection at LEP and could be observable at LHC as a peak in H_1 -> gamma gamma at around 100 GeV. The LSP is mostly singlino and is consistent with WMAP constraints due to coannihilation with the lightest stau, whose mass is in the range 100-250 GeV. Such light staus may lead to very characteristic signatures at LHC and be directly searched at linear colliders. In these models tan(beta) is large, of order 50, still the branching ratio for B_s -> mu+ mu- is consistent with the LHCb bounds and in many cases is also even smaller than the SM prediction. Gluinos and squarks have masses in the 2 - 3 TeV region and may be accessible at the LHC at 14 TeV. No large enhancement of the H_2 -> gamma gamma rate over that of the SM Higgs is expected.
description: 46 pages, 13 figures. Typo in Table 4 corrected
On the coupling of quasi-simultaneous NeXT for detection of rock damage by salt crystallization
Creators: name: Sebaa, Moustafa
Publisher: name: figshare
Year: 2021
Subjects: subject: 90501 Civil Geotechnical Engineering
subject: FOS: Civil engineering
subject: 91308 Solid Mechanics
subject: FOS: Mechanical engineering
subject: 91402 Geomechanics and Resources Geotechnical Engineering
subject: FOS: Environmental engineering
subject: 80106 Image Processing
subject: FOS: Computer and information sciences

description: Many parameters play a major role in the weathering process; temperature, saturation (fully, partially saturated), chemical composition, humidity, etc. For a reliable prediction of Socoa’s coastal erosion, insights about the dynamical pore scale processes of haloclasty are needed. For this purpose, a series of experiments have been conducted at D50 instrumentto visualise the dynamism of sodium sulfate crystallization on rocks of different heterogeneities. Starting by gentle ones, a cylindrical sample of Vosges-Sandstone has been partially immerged into salt solution (3molal, 34◦C) while being exposed quasi-simultaneously to X-rays (for 18 min) and Neutrons (for 60min) to capture time-change of porosity along with the imbibition and diffusion of salt solution within the sample. The imbibition of salt towards the top of the sample (ambient temperature) triggered its phase transition and caused gradual damage. In this report, an analysis workflow of NeXT data is defined to provide insights into the coupling of damage evolution and salt content. After data reconstruction, the segmentation of the images was challenging. A 2D analysis of the images showed a high sensitivity of porosity to thresholding limits. Therefore, we adapted the threshold to the porosity measured by MIP. Due to basic differences of neutron and X-ray interaction with porous materials, the contrast variation between both imaging modalities highlights different structural information about the VS sample, hence, the simultaneity of both techniques is important to couple salt content changes with damage and porosity evolution under the same conditions. The study ends with perspectives on the use of neutrons data to correct the porosity under the imbibition interface (moisture profile), and also to identify salt crystallization induced-damage by measuring the saltcontent, with suggestions for local MIP measurements.

@UPPA-2020\_LFCR(G2MP)\_MPPM/EZPONDA-PROJECT
#This is the manuscript of a MSc thesis within G2MP group at LFCR Laboratory (UPPA, France). Due to COVID-19, the defense has been held online on 7th Sept. 2020.
On the coupling of quasi-simultaneous NeXT for detection of rock damage by salt crystallization
Creators: name: Sebaa, Moustafa
Publisher: name: figshare
Year: 2020
Subjects: subject: 90501 Civil Geotechnical Engineering
subject: FOS: Civil engineering
subject: 91308 Solid Mechanics
subject: FOS: Mechanical engineering
subject: 91402 Geomechanics and Resources Geotechnical Engineering
subject: FOS: Environmental engineering
subject: 80106 Image Processing
subject: FOS: Computer and information sciences

description: Many parameters play a major role in the weathering process; temperature, saturation (fully, partially saturated), chemical composition, humidity, etc. For a reliable prediction of Socoa’s coastal erosion, insights about the dynamical pore scale processes of haloclasty are needed. For this purpose, a series of experiments have been conducted at D50 instrumentto visualise the dynamism of sodium sulfate crystallization on rocks of different heterogeneities. Starting by gentle ones, a cylindrical sample of Vosges-Sandstone has been partially immerged into salt solution (3molal, 34◦C) while being exposed quasi-simultaneously to X-rays (for 18 min) and Neutrons (for 60min) to capture time-change of porosity along with the imbibition and diffusion of salt solution within the sample. The imbibition of salt towards the top of the sample (ambient temperature) triggered its phase transition and caused gradual damage. In this report, an analysis workflow of NeXT data is defined to provide insights into the coupling of damage evolution and salt content. After data reconstruction, the segmentation of the images was challenging. A 2D analysis of the images showed a high sensitivity of porosity to thresholding limits. Therefore, we adapted the threshold to the porosity measured by MIP. Due to basic differences of neutron and X-ray interaction with porous materials, the contrast variation between both imaging modalities highlights different structural information about the VS sample, hence, the simultaneity of both techniques is important to couple salt content changes with damage and porosity evolution under the same conditions. The study ends with perspectives on the use of neutrons data to correct the porosity under the imbibition interface (moisture profile), and also to identify salt crystallization induced-damage by measuring the saltcontent, with suggestions for local MIP measurements.

@UPPA-2020\_LFCR(G2MP)\_MPPM/EZPONDA-PROJECT
#This is the manuscript of a MSc thesis within G2MP group at LFCR Laboratory (UPPA, France). Due to COVID-19, the defense has been held online on 7th Sept. 2020.
title: Oltre gli stereotipi sulla violenza di genere. Approcci, teorie e ricerche
Creators: name: Gianturco, Giovanna
name: Brancato, Giovanni
Publisher: name: Sapienza Università Editrice
Year: 2022

description: La violenza di genere è un fenomeno che persiste nelle attuali società e che genera profonde ferite sia sul piano individuale che su quello collettivo. Recenti studi e ricerche non solo evidenziano quanto questo tema sia ancora attuale e complesso, ma sottolineano anche il ruolo centrale della (in)formazione per la promozione e la diffusione di una nuova cultura dell’uguaglianza e dell’inclusione volta al contrasto di ogni forma di violenza di genere.

Per tale ragione, il volume si propone di fornire gli strumenti necessari all’acquisizione di una prospettiva critica transdisciplinare sul fenomeno della violenza di genere, alla sua comprensione e al suo contrasto, raccogliendo contributi teorici ed empirici caratterizzati da approcci e competenze differenti a cavallo tra le scienze sociali, politiche, demo-antropologiche, giuridiche, mediche e psicologiche.
Ulysses Kay Music Composition Diary 1949-1990, 1976, unnumbered pages
Creators: name: Kay, Ulysses, 1917-1995
Publisher: name: Columbia University
Year: 2018
Subjects: Music
Music by African American composers

description: In these two pages, Kay kept track of the progress of "Jubliee," his first three-act opera, based on a novel by Margaret Walker, with a libretto by Donald Dorr. It was premiered by Opera/South on November 19, 1977, Paul Freeman conducting.
Diurnal astronomy: using sticks and threads to find our latitude on Earth
Creators: name: Camino, Nestor
name: Gangui, Alejandro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: It is well known that the length and orientation of a shadow cast by a vertical gnomon depends on the time of the day and on the season of the year. But it also depends on the latitude of the site of observation. During the equinoxes, the temporal sequence of the shadows cast by each of the points that form any object follows a straight line from west to east. A simple construction using sticks and threads can be used to materialize the plane of celestial equator's local projection, giving us a way to calculate our astronomical latitude during daytime with high precision.
description: Published version available at http://cms.iafe.uba.ar/gangui/didaastro/#Publications
Some characterizations of nilpotent $n$-Lie superalgebras
Creators: name: Guan, Baoling
name: Chen, Liangyun
name: Yao, Ma
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: The paper studies nilpotent $n$-Lie superalgebras. More specifically speaking, we first prove Engel's theorem for $n$-Lie superalgebras. Second, we research some properties of nilpotent $n$-Lie superalgebras, Finally, we give several sufficient conditions that an $n$-Lie superalgebra is nilpotent.
The Logarithmic Singularities of the Green Functions of the Conformal Powers of the Laplacian
Creators: name: Ponge, Raphael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary 53A55, Secondary 53A30

description: Green functions play an important role in conformal geometry. In this paper, we explain how to compute explicitly the logarithmic singularities of the Green functions of the conformal powers of the Laplacian. These operators include the Yamabe and Paneitz operators, as well as the conformal fractional powers of the Laplacian arising from scattering theory for Poincaré-Einstein metrics. The results are formulated in terms of Weyl conformal invariants arising from the ambient metric of Fefferman-Graham. As applications we obtain "Green function" characterizations of locally conformally flat manifolds and a spectral theoretic characterization of the conformal class of the round sphere.
description: 22 pages. v3: final version. To appear in Contemp. Math
FreeMe project - 1st Press Release
Creators: name: EXELISISPC
Publisher: name: Zenodo
Year: 2023
Subjects: dissemination
FreeMe
Horizon Europe
plastics
plating
coating
plating on plastics
nickel
chromium
safe
sustainable
SSbD
DST
press release
automotive
aerospace
home appliances

description: FreeMe's Kick-off Meeting
Large-scale Ferrofluid Simulations on Graphics Processing Units
Creators: name: Polyakov, A. Yu.
name: Lyutyy, T. V.
name: Denisov, S.
name: Reva, V. V.
name: Hanggi, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present an approach to molecular-dynamics simulations of ferrofluids on graphics processing units (GPUs). Our numerical scheme is based on a GPU-oriented modification of the Barnes-Hut (BH) algorithm designed to increase the parallelism of computations. For an ensemble consisting of one million of ferromagnetic particles, the performance of the proposed algorithm on a Tesla M2050 GPU demonstrated a computational-time speed-up of four order of magnitude compared to the performance of the sequential All-Pairs (AP) algorithm on a single-core CPU, and two order of magnitude compared to the performance of the optimized AP algorithm on the GPU. The accuracy of the scheme is corroborated by comparing the results of numerical simulations with theoretical predictions.
The Star Formation Laws of Eddington-Limited Star-Forming Disks
Creators: name: Ballantyne, D. R.
name: Armour, J. N.
name: Indergaard, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Two important avenues into understanding the formation and evolution of galaxies are the Kennicutt-Schmidt (KS) and Elmegreen-Silk (ES) laws. These relations connect the surface densities of gas and star formation (\sigmagas\ and \sigmastar, respectively) in a galaxy. To elucidate the KS and ES laws for disks where \sigmagas >~ 10^4 Msun pc-2}, we compute 132 Eddington-limited star-forming disk models with radii spanning tens to hundreds of parsecs. The theoretically expected slopes (approx. 1 for the KS law and approx. 0.5 for the ES relation) are relatively robust to spatial averaging over the disks. However, the star formation laws exhibit a strong dependence on opacity that separates the models by the dust-to-gas ratio that may lead to the appearance of a erroneously large slope. The total infrared luminosity (L_TIR) and multiple carbon monoxide (CO) line intensities were computed for each model. While L_TIR can yield an estimate of the average \sigmastar\ that is correct to within a factor of 2, the velocity-integrated CO line intensity is a poor proxy for the average \sigmagas\ for these warm and dense disks, making the CO conversion factor (α_CO) all but useless. Thus, observationally derived KS and ES laws at these values of \sigmagas\ that uses any transition of CO will provide a poor measurement of the underlying star formation relation. Studies of the star formation laws of Eddington-limited disks will require a high-J transition of a high density molecular tracer, as well as a sample of galaxies with known metallicity estimates.
description: 12 pages, 9 figure, accepted by ApJ
Hom-Nijienhuis operator and $T$*-extension of Hom-Lie Superalgebras
Creators: name: Liu, Yan
name: Chen, Liangyun
name: Ma, Yao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In this paper, we study hom-Lie superalgebras. We give the definition of hom-Nijienhuis operators of regualr hom-Lie superalgebras and show that the deformation generated by a hom-Nijienhuis operator is trivial. Moreover, we introduce the definition of $T^*$-extensions of Hom-Lie superalgebras and show that $T^*$-extensions preserve many properties such as nilpotency, solvability and decomposition in some sense. We also investigate the equivalence of $T^*$-extensions.
description: arXiv admin note: text overlap with arXiv:1005.0140 by other authors
Extensions of amenable groups by recurrent groupoids
Creators: name: Juschenko, Kate
name: Nekrashevych, Volodymyr
name: de la Salle, Mikael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We show that amenability of a group acting by homeomorphisms can be deduced from a certain local property of the action and recurrency of the orbital Schreier graphs. This covers amenability of a wide class groups, the amenability of which was an open problem, as well as unifies many known examples to one general proof. In particular, this includes Grigorchuk's group, Basilica group, the full topological group of Cantor minimal system, groups acting on rooted trees by bounded automorphisms, groups generated by finite automata of linear activity growth, groups that naturally appear in holomorphic dynamics.
description: The last condition of the main thm was removed, the proofs are streamlined
The Proper Motion of PSR J0205+6449 in 3C 58
Creators: name: Bietenholz, M. F.
name: Kondratiev, V.
name: Ransom, S.
name: Slane, P.
name: Bartel, N.
name: Buchner, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report on sensitive phase-referenced and gated 1.4-GHz VLBI radio observations of the pulsar PSR J0205+6449 in the young pulsar-wind nebula 3C 58, made in 2007 and 2010. We employed a novel technique where the ~105-m Green Bank telescope is used simultaneously to obtain single-dish data used to determine the pulsar's period as well as to obtain the VLBI data, allowing the VLBI correlation to be gated synchronously with the pulse to increase the signal-to-noise. The high timing noise of this young pulsar precludes the determination of the proper motion from the pulsar timing. We derive the position of the pulsar accurate at the milliarcsecond level, which is consistent with a re-determined position from the Chandra X-ray observations. We reject the original tentative optical identification of the pulsar by Shearer and Neustroev (2008), but rather identify a different optical counterpart on their images, with R-band magnitude ~24. We also determine an accurate proper motion for PSR J0205+6449 of (2.3 +- 0.3) mas/yr, corresponding to a projected velocity of only (35 +- 6) km/s for a distance of 3.2 kpc, at p.a. -38 deg. This projected velocity is quite low compared to the velocity dispersion of known pulsars of ~200 km/s. Our measured proper motion does not suggest any particular kinematic age for the pulsar.
description: 10 pages, 7 figures; accepted for publication in MNRAS
Hawking Radiation from Small Black Holes at Strong Coupling and Large N
Creators: name: Haddad, Nidal
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a previous work an approximate static metric was found of a test black string that stretches from the boundary to the horizon of the planar Schwarzschild-AdS_5 geometry. This is the gravity dual of the Unruh state for \mathcal{N}=4, SU(N) super Yang-Mills theory on a 4-dimensional Schwarzschild background, at large N and large 'tHooft coupling. We compute the holographic stress tensor of the gravitational solution and it turns out to possess many essential features of the Unruh state for weakly-coupled Hawking radiation, such as the appearance of a negative energy density near the black hole horizon and a positive energy density at infinity. It also confirms recent results that at leading order in N, the expectation value of the stress tensor in the Unruh state is finite on both the future and past horizons, and that at this order there are no flux terms as is expected in the black droplet phase.
description: 12 pages, 2 figures. v2: minor corrections and appendix added
Data publication: Longitudinal and multimodal radiomics models for head-and-neck cancer outcome prediction
Creators: name: Starke, Sebastian
name: Zwanenburg, Alex
name: Leger, Karoline
name: Zöphel, Klaus
name: Kotzerke, Jörg
name: Krause, Mechthild
name: Baumann, Michael
name: Troost, Esther Gera Cornelia
name: Löck, Steffen
Publisher: name: Rodare
Year: 2022
Subjects: radiomics
head-and-neck cancer
loco-regional control
survival analysis
computed tomography
positron emission tomography
cox proportional hazards
longitudinal imaging

description: We include the input data, analysis scripts, analysis results and scripts to create the visualizations and plots used in the manuscript and supplement to our article "Longitudinal and multimodal radiomics models for head-and-neck cancer outcome prediction".
Dynamical Modeling of Galaxy Mergers using Identikit
Creators: name: Privon, G. C.
name: Barnes, J. E.
name: Evans, A. S.
name: Hibbard, J. E.
name: Yun, M. S.
name: Mazzarella, J. M.
name: Armus, L.
name: Surace, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present dynamical models of four interacting systems: NGC 5257/8, The Mice, the Antennae, and NGC 2623. The parameter space of the encounters are constrained using the Identikit model-matching and visualization tool. Identikit utilizes hybrid N-body and test particle simulations to enable rapid exploration of the parameter space of galaxy mergers. The Identikit-derived matches of these systems are reproduced with self-consistent collisionless simulations which show very similar results. The models generally reproduce the observed morphology and \HI\ kinematics of the tidal tails in these systems with reasonable properties inferred for the progenitor galaxies. The models presented here are the first to appear in the literature for NGC 5257/8 and NGC 2623, and The Mice and the Antennae are compared with previously published models. Based on the assumed mass model and our derived initial conditions, the models indicate the four systems are currently being viewed 175-260 Myr after first passage and cover a wide range of merger stages. In some instances there are mismatches between the models and the data (e.g., in the length of a tail); these are likely due to our adoption of a single mass model for all galaxies. Despite the use of a single mass model, these results demonstrate the utility of Identikit in constraining the parameter space for galaxy mergers when applied to real data.
description: 15 pages, 8 figures. accepted for publication in ApJ. Movies of simulations available at http://goals.ipac.caltech.edu/identikit/
Renewable energy communities, digitalization and information
Creators: name: Bergemann, Dirk
name: Bertolini, Marina
name: Castellini, Marta
name: Moretto, Michele
name: Vergalli, Sergio
name: Bergemann, Dirk
name: Bertolini, Marina
name: Castellini, Marta
name: Moretto, Michele
name: Vergalli, Sergio
Publisher: name: Unknown
Year: 2022
Subjects: subject: Demand and Price Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: smart grids
subject: renewable energy sources,
subject: renewable energy communities
subject: prosumers
subject: peer to peer energy trading,
subject: information
subject: privacy costs

description: In this work we study the case of agents willing to engage in a Renewable Energy Community (REC). The municipality – being the promoter of the REC – burdens all the investment costs (RE plants, storage, local grid interventions) and entrusts an aggregator of its operation paying a fixed tariff. The latter, acting as a monopolist, is also the sole supplier of energy for the REC’s members. The management of the REC requires the collection of energy data from the members to assure its efficient operation on the side of the self-consumption and exchange of energy within it. Such data allow also the identification of the agents’ preferences across energy devices and are an additional source of revenues for the aggregator thanks to their sell to third parts. This behaviour translates into a dis-utility the agents, which we call privacy cost. In such a framework, we consider also uncertainty on the side of the investment cost. On the basis of the outcomes of our model, we are able to study the effect of data collection policy performed by the aggregator on the size of the REC, while also accounting for agents’ valuation and the role of uncertainty on the investment cost side.
Suppression of quantum-mechanical reflection by environmental decoherence
Creators: name: Bedingham, D. J.
name: Halliwell, J. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In quantum mechanics an incoming particle wave packet with sufficient energy will undergo both transmission and reflection when encountering a barrier of lower energy, but in classical mechanics there is no reflection, only transmission. In this paper we seek to explain the disappearance of quantum-mechanical reflection in the quasi-classical limit, using standard methods of decoherence through environmental interaction. We consider two models. In the first, the incoming particle is classicalized by coupling it to an environment described by a standard Lindblad master equation diagonalizing in position. We find, however, that suppression of reflection is achieved only for environmental interaction so strong that large fluctuations in momentum are generated which blurs the distinction between incoming and reflected wave packets. This negative conclusion also holds for a complex potential which has similar implications for attempts to understand the suppression of the Zeno effect using the same mechanism (discussed in more detail in another paper). A different Lindblad master diagonalizing in momentum is shown to be successful in suppressing reflection without large fluctuations but such a master equation is unphysical. We consider a second model in which the barrier is modelled quantum-mechanically by a massive target particle coupled to an environment to maintain it in a quasi-classical state. This avoids the fluctuations problem since the incoming particle is not coupled to the environment directly. We find that reflection is significantly suppressed as long as the decoherence timescale of the target particle is much smaller than certain characteristic scattering timescales of the incoming particle, or equivalently, as long as the velocity fluctuations in the target are larger than the velocity of the incoming particle.
description: 43 pages, Latex. Revised in response to referee comments. Accepted for publication in Phys Rev A
title: Bridging Political Pledges and Physical Observations
Publisher: name: ICOS ERIC -- Carbon Portal
Year: 2024
Subjects: Deliverable Horizon2020 Urban Greenhouse Gases Policy Paris

description: This report assesses the effectiveness of an atmospheric monitoring network in tracking emission changes over time, with a primary focus on Paris. The objective is to understand the network's capabilities and limitations, emphasizing its role in supporting the city's strive to reduce carbon emissions. Reducing cities' contributions is crucial in achieving climate neutrality at the national scale. Therefore, reliable information on cities' emission trends is needed to implement effective climate
policies.
The effects of COVID-19 on the digitisation of Scientific Research - Presentation at Future Labs Live 2022
Creators: name: Kanza, Samantha. P.
Publisher: name: Zenodo
Year: 2022
Subjects: electronic lab notebooks
ELNs
Data Management
RDM
COVID-19
digitisation
scientific research

description: Presentation given by Dr Samantha P. Kanza on behalf of AI4SD and PSDI at Future Labs Live 2022. Abstract: COVID-19 turned our world upside down, but what long term impact did it have on our scientific research? The (still somewhat lacking) digitisation of scientific research has long been an issue, with the world progressing to hybrid working, zoom meetings and conducting scientific research from anywhere with an internet connection, our team investigated how the current landscape of the digitisation of scientific research has changed since COVID-19, comparing the results to those of 4 years ago when the world was a very different place. This presentation looks at the historic issues relating to the digitisation of scientific research, provides an analysis on what has changed, and discusses the current barriers and issues that still remain. As part of the work conducted on the Physical Sciences Data Infrastructure Pilot Project, we have laid out a plan for improving the digitisation of scientific research moving forward, considering the hardware, software, and social aspects that need to be considered
Multi-Wavelength Observations of Short-Duration Gamma-Ray Bursts: Recent Results
Creators: name: Kann, David Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The number of detections as well as significantly deep non-detections of optical/NIR afterglows of Type I (short-duration population) Gamma-Ray Bursts (GRBs) has become large enough that statistically meaningful samples can now be constructed. I present within some recent results on the luminosity distribution of Type I GRB afterglows in comparison to those of Type II GRBs (collapsar population), the issue of the existence of jet breaks in Type I GRB afterglows, and the discovery of dark Type I GRBs.
description: 10 pages, 3 figures, based on an invited talk, to appear in the proceedings of the Gamma-Ray Burst Symposium 2012- IAA-CSIC - Marbella, editors: Castro-Tirado, A. J., Gorosabel, J. and Park, I. H; v2: accepted, slightly expanded, minor changes after referee report
Systems of quotients of Lie triple systems
Creators: name: Ma, Yao
name: Chen, Liangyun
name: Lin, Jie
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In this paper, we introduce the notion of system of quotients of Lie triple systems and investigate some properties which can be lifted from a Lie triple system to its systems of quotients. We relate the notion of Lie triple system of Martindale-like quotients with respect to a filter of ideals and the notion of system of quotients, and prove that the system of quotients of a Lie triple system is equivalent to the algebra of quotients of a Lie algebra in some sense, and these allow us to construct the maximal system of quotients for nondegenerate Lie triple systems.
description: To appear in Commun. Algebra
Harmonic Generation in Multi-Resonant Plasma Films
Creators: name: Vincenti, M. A.
name: de Ceglia, D.
name: Haus, J. W.
name: Scalora, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate second and third harmonic generation in a slab of material that displays plasma resonances at the pump and its harmonic frequencies. Near-zero refractive indices and local field enhancement can deplete the pump for kW/cm2 incident powers, without resorting to other resonant photonic mechanisms. We show that low-threshold, highly-efficient nonlinear processes are possible in the presence of losses and phase-mismatch in structures that are 104 times shorter than typical KDP or LiNbO3 crystals, for relatively low irradiance values.