cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparative investigation on the chemical pre-desulfurization process of a high sulfur coal through orthogonal experiments: a case study
Creators: name: Chen, Yumeng
name: Huang, Lanhui
name: Song, Zhendong
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Microbiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: The effect of different chemical pre-desulfurization processes were compared to achieve the utilization of high sulfur coal efficiently and economically and its total sulfur content is 2.19%. The major influence factors were the reagent dosage, desulfurization temperature, and time. Compared with single-factor experiments, orthogonal experiments can greatly reduce the number of experiments and ensure the rationality of experimental data. The desulfurization rate of acid leach, alkali leach, oxidation, and catalytic reduction were 41.67%, 17.16%, 26.96%, and 27.45%, respectively, and the total sulfur after the pre-desulfurization process were 1.19%, 1.69%, 1.49%, and 1.48%, respectively. Range analysis and variance analysis were employed for the crucial operational parameters. In acid and alkali leaching desulfurization process, the acid/alkali concentration had the greatest influence on the desulfurization effect. In oxidation desulfurization process, the desulfurization time had the greatest influence on the desulfurization effect. In catalytic reduction desulfurization, the reducing agent dosage was the most important factor. The main factor for the results above was that the desulfurization mechanisms were different. Therefore, the research of different desulfurization mechanisms is the main direction of future work. The consequence of this paper would provide data support for the selection of the desulfurization method for high sulfur coal.
Transverse charge densities of the deuteron in soft-wall AdS/QCD
Creators: name: Huang, Chao
name: Ma, Bo-Qiang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the transverse charge densities of the deuteron in a soft-wall AdS/QCD model by considering both the unpolarized and the transversely polarized cases. The deuteron form factors are derived from the soft-wall AdS/QCD model and it is shown that the calculated results agree with the phenomenological parametrization and experimental data. The transverse charge densities of the deuteron are also derived from the soft-wall AdS/QCD model, and we notice slight deviations from those of the phenomenological parametrization.
description: 10 latex pages, 4 figures, final version for journal publication
Robust two-level system control by a detuned and chirped laser pulse
Creators: name: Jo, Hanlae
name: Lee, Han-gyeol
name: Guerin, Stephane
name: Ahn, Jaewook
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose and demonstrate a robust control scheme by ultrafast nonadiabatic chirped laser pulse, designed for targeting coherent superpositions of two-level systems. Robustness against power fluctuation is proved by our numerical study and a proof-of-principle experiment performed with femtosecond laser interaction on cold atoms. They exhibit for the final driven dynamics a cusp on the Bloch sphere, corresponding to a zero curvature of fidelity. This solution is particularly simple and thus applicable to a wide range of potential applications.
description: 5 pages. 4 figures
Sourcing Dark Matter and Dark Energy from $α$-attractors
Creators: name: Mishra, Swagat S.
name: Sahni, Varun
name: Shtanov, Yuri
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently, Kallosh and Linde have drawn attention to a new family of superconformal inflationary potentials, subsequently called $α$-attractors. The $α$-attractor family can interpolate between a large class of inflationary models. It also has an important theoretical underpinning within the framework of supergravity. We demonstrate that the $α$-attractors have an even wider appeal since they may describe dark matter and perhaps even dark energy. The dark matter associated with the $α$-attractors, which we call $α$-dark matter ($α$DM), shares many of the attractive features of fuzzy dark matter, with $V(φ) = \frac{1}{2}m^2φ^2$, while having none of its drawbacks. Like fuzzy dark matter, $α$DM can have a large Jeans length which could resolve the cusp-core and substructure problems faced by standard cold dark matter. $α$DM also has an appealing tracker property which enables it to converge to the late-time dark matter asymptote, $\langle w\rangle \simeq 0$, from a wide range of initial conditions. It thus avoids the enormous fine-tuning problems faced by the $m^2φ^2$ potential in describing dark matter.
description: 43 pages, 22 figures, Some clarifications and an additional reference. Main results unchanged. Accepted for publication in JCAP
Entanglement entropy and Möbius transformations for critical fermionic chains
Creators: name: Ares, F.
name: Esteve, J. G.
name: Falceto, F.
name: de Queiroz, A. R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Entanglement entropy may display a striking new symmetry under Möbius transformations. This symmetry was analysed in our previous work for the case of a non-critical (gapped) free homogeneous fermionic chain invariant under parity and charge conjugation. In the present work we extend and analyse this new symmetry in several directions. First, we show that the above mentioned symmetry also holds when parity and charge conjugation invariance are broken. Second we extend this new symmetry to the case of critical (gapless) theories. Our results are further supported by numerical analysis. For some particular cases, analytical demonstrations show the validity of the extended symmetry. We finally discuss the intriguing parallelism of this new symmetry and space-time conformal transformations.
description: 38 pages, 8 figures. Final version published in JSTAT. Typos corrected, references updated
Non-geometric fluxes & tadpole conditions for exotic branes
Creators: name: Lombardo, Davide M.
name: Riccioni, Fabio
name: Risoli, Stefano
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the $P$-flux analysis carried out recently on the $T^6/[\mathbb{Z}_2 \times \mathbb{Z}_2 ]$ type-II orientifold model to include all the possible non-geometric fluxes. By deriving universal T-duality rules for all the fluxes, we are able to write down a complete expression for the superpotential for both the IIB and IIA theories. By exploiting the universal T-duality rules that apply to all the branes in string theory, we then identify all the exotic branes that can be consistently included to cancel the tadpoles induced by the fluxes. Finally, we derive the representations of these branes with respect to the $SL(2,\mathbb{Z})^7$ duality symmetry of the model.
description: 33 pages, refs. added. Notation improved. Discussion on the solutions of the tadpole conditions added in the conclusions. Version published on JHEP
The Fast and the Fiducial: Augmented kludge waveforms for detecting extreme-mass-ratio inspirals
Creators: name: Chua, Alvin J. K.
name: Moore, Christopher J.
name: Gair, Jonathan R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into massive black holes are an important class of source for the future space-based gravitational-wave detector LISA. Detecting signals from EMRIs will require waveform models that are both accurate and computationally efficient. In this paper, we present the latest implementation of an augmented analytic kludge (AAK) model, publicly available at github.com/alvincjk/EMRI_Kludge_Suite as part of an EMRI waveform software suite. This version of the AAK model has improved accuracy compared to its predecessors, with two-month waveform overlaps against a more accurate fiducial model exceeding 0.97 for a generic range of sources; it also generates waveforms 5-15 times faster than the fiducial model. The AAK model is well suited for scoping out data analysis issues in the upcoming round of mock LISA data challenges. A simple analytic argument shows that it might even be viable for detecting EMRIs with LISA through a semi-coherent template bank method, while the use of the original analytic kludge in the same approach will result in around 90% fewer detections.
description: Published version
British Gallup Poll CQ 587
Creators: name: Social Surveys (Gallup Poll) Limited
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Government approval (1); James Callaghan performance (1); Margaret Thatcher performance (1); Daniel Steel performance (1); party support (1); last general election (2); urgent problems (2); best party to handle problems (1); next general election (2); party with best policies (1); party with best leaders (1); party unity (2); difference in parties (1); best Prime Minister (1); government price policy (7); Liberal party (10); cigarette smoker (1); vinyl wallpaper (28); oil companies (69); television habits (4); home appliances (63); cosmetics (131).
title: Investigating the late accretion history and convective homogenization of the terrestrial mantle – new perspectives from coupled Ru isotope and HSE abundance data
Creators: name: Tusch, Jonas
name: Fischer-Gödde, Mario
name: Hoffmann, J. Elis
name: Gerritzen, Carina
name: Maier, Wolfgang
name: Van Kranendonk, Martin
name: Smithies, Hugh
name: Becker, Harry
name: Münker, Carsten
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The relative and absolute abundances of highly siderophile elements (HSE) present in the modern terrestrial mantle has been set during late accretion of meteoritic materials that the Earth received after cessation of core formation. In particular, the study of HSE abundances in komatiite melts that erupted between 3.5 and 2.9 Ga revealed the slow mixing of HSE-rich late accreted material into the terrestrial mantle and the progressive homogenization of primordial domains by continuing mantle convection.

Here, we report new Ru isotope and HSE abundance data for komatiitic rocks from the 3.46 Ga Dwalile greenstone remnant in the Kaapvaal Craton, SW Swaziland and from 3.5-3.2 Ga old komatiitic rocks from the Pilbara Craton, NW Australia. In contrast to 100Ru excesses identified in 3.5-3.2 Ga old komatiites from the Pilbara, contemporaneous komatiites melts from Swaziland were found to have 100Ru values indistinguishable from the modern mantle. Although HSE abundances in Dwalile komatiites show up to 2 times enrichment compared to primitive mantle estimates, the modern mantle-like Ru isotope composition of these rocks constrains that the Dwalile mantle source already fully equilibrated with the late accreted components by 3.5 Ga. These findings ultimately demonstrate that apparent HSE enrichments compared to the modern mantle may not necessarily reflect mass excesses of late accreted components. Therefore, our new data reveal that calculated HSE contents of mantle domains should be carefully interpreted with regard to the late accretion history of Earth and ideally combined with other sensitive tracers such as 100Ru isotope systematics.
Dark matter in U(1) extensions of the MSSM with gauge kinetic mixing
Creators: name: Bélanger, Geneviève
name: Da Silva, Jonathan
name: Tran, Hieu Minh
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The gauge kinetic mixing in general is allowed in models with multiple Abelian gauge groups. In this paper, we investigate the gauge kinetic mixing in the framework of $U(1)$ extensions of the MSSM. It enlarges the viable parameter space, and has an important effect on the particle mass spectrum as well as the $Z_2$ coupling with matters. The SM-like Higgs boson mass can be enhanced with a nonzero kinetic mixing parameter and the muon $g-2$ tension is slightly less severe than in the case of no mixing. We present the results from both benchmark analysis and global parameter scan. Various theoretical and phenomenological constraints have been considered. The recent LHC searches for the $Z_2$ boson are important for the case of large positive kinetic mixing where the $Z_2$ coupling is enhanced, and severely constrain scenarios with $M_{Z_2} < 2.8$ TeV. The viable dark matter candidate predicted by the model is either the neutralino or the right-handed sneutrino. Cosmological constraints from dark matter searches play a significant role in excluding the parameter space. Portions of the parameter space with relatively low sparticle mass spectrum can be successfully explored in the LHC run-2 as well as future linear colliders and dark matter searches.
description: 32 pages, 14 figures, published in Physical Review D
Symmetric Riemannian problem on the group of proper isometries of hyperbolic plane
Creators: name: Podobryaev, A. V.
name: Sachkov, Yu. L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We consider the Lie group PSL(2) (the group of orientation preserving isometries of the hyperbolic plane) and a left-invariant Riemannian metric on this group with two equal eigenvalues that correspond to space-like eigenvectors (with respect to the Killing form). For such metrics we find a parametrization of geodesics, the conjugate time, the cut time and the cut locus. The injectivity radius is computed. We show that the cut time and the cut locus in such Riemannian problem converge to the cut time and the cut locus in the corresponding sub-Riemannian problem as the third eigenvalue of the metric tends to infinity. Similar results are also obtained for SL(2).
description: 39 pages, 7 figures
Online Behaviors of Social Movement Organizations and Activists
Creators: name: Zhang, Lu
Publisher: name: University of Chicago
Year: 2023
Subjects: subject: Social Movement Organization
subject: Activists
subject: Digital Activism
subject: Social Network Sites
subject: Machine Learning
subject: Big Data
subject: Social Media
subject: Social Movement

description: Social network sites and digital activism allow participants to engage in social movements with lower participation costs and organizing costs, yet with higher risks. Thus, the traditional role of Social Movement Organizations (SMOs) in providing selective incentives is challenged. A comprehensive understanding of social movement, especially digital activism, can only be achieved by recognizing both SMOs’ and individual activists’ contributions. To compare their online roles and abilities with each other, I focused on the Black Lives Matter movement as a case study and leveraged 23.7 million tweets from 5.5 million users. SMOs and individual activists are classified at scale using the RoBERTa model with Lamb optimizer to mitigate sampling bias. I concluded that activists and SMOs have similar online behaviors in overall influences and their contribution to the social movement’s continuity and long-term viability. However, SMOs still dominate in stimulating conversation among new audiences compared to activists and other types of accounts in the online setting.
A Genetic Algorithm Approach for Modelling Low Voltage Network Demands
Creators: name: Giasemidis, Georgios
name: Haben, Stephen
name: Lee, Tamsin
name: Singleton, Colin
name: Grindrod, Peter
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Distribution network operators (DNOs) are increasingly concerned about the impact of low carbon technologies on the low voltage (LV) networks. More advanced metering infrastructures provide numerous opportunities for more accurate load flow analysis of the LV networks. However, such data may not be readily available for DNOs and in any case is likely to be expensive. Modelling tools are required which can provide realistic, yet accurate, load profiles as input for a network modelling tool, without needing access to large amounts of monitored customer data. In this paper we outline some simple methods for accurately modelling a large number of unmonitored residential customers at the LV level. We do this by a process we call buddying, which models unmonitored customers by assigning them load profiles from a limited sample of monitored customers who have smart meters. Hence the presented method requires access to only a relatively small amount of domestic customers' data. The method is efficiently optimised using a genetic algorithm to minimise a weighted cost function between matching the substation data and the individual mean daily demands. Hence we can show the effectiveness of substation monitoring in LV network modelling. Using real LV network modelling, we show that our methods perform significantly better than a comparative Monte Carlo approach, and provide a description of the peak demand behaviour.
description: Changes to match published version
A Common Central Engine for Long Gamma Ray Bursts and Type Ib/c Supernovae?
Creators: name: Sobacchi, E.
name: Granot, J.
name: Bromberg, O.
name: Sormani, M. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Long-duration, spectrally-soft Gamma-Ray Bursts (GRBs) are associated with Type Ic Core Collapse (CC) Supernovae (SNe), and thus arise from the death of massive stars. In the collapsar model, the jet launched by the central engine must bore its way out of the progenitor star before it can produce a GRB. Most of these jets do not break out, and are instead "choked" inside the star, as the central-engine activity time, $t_{\rm e}$, is not long enough. Modelling the long-soft GRB duration distribution assuming a power-law distribution for their central-engine activity times, $\propto t_{\rm e}^{-α}$ for $t_{\rm e}>t_{\rm b}$, we find a steep distribution ($α\sim4$) and a typical GRB jet breakout time of $t_{\rm b}\sim 60\text{ s}$ in the star's frame. The latter suggests the presence of a low-density, extended envelope surrounding the progenitor star, similar to that previously inferred for low-luminosity GRBs. Extrapolating the range of validity of this power law below what is directly observable, to $t_{\rm e}
description: 12 pages, 2 figures, accepted by MNRAS
Canonical Realization of (2+1)-dimensional Bondi-Metzner-Sachs symmetry
Creators: name: Batlle, Carles
name: Campello, Victor
name: Gomis, Joaquim
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct canonical realizations of the $\mathfrak{bms}_3$ algebra as symmetry algebras of a free Klein-Gordon (KG) field in $2+1$ dimensions, for both the massive and massless case. We consider two types of realizations, one on-shell, written in terms of the Fourier modes of the scalar field, and the other one off-shell with non-local transformations written in terms of the KG field and its momenta. These realizations contain both supertranslations and superrotations, for which we construct the corresponding Noether charges.
description: Version accepted for publication in PRD. Expanded title and expanded discussion about superrotations in the massive case
The origin of the mass discrepancy-acceleration relation in $Λ$CDM
Creators: name: Navarro, Julio F.
name: Benítez-Llambay, Alejandro
name: Fattahi, Azadeh
name: Frenk, Carlos S.
name: Ludlow, Aaron D.
name: Oman, Kyle A.
name: Schaller, Matthieu
name: Theuns, Tom
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We examine the origin of the mass discrepancy--radial acceleration relation (MDAR) of disk galaxies. This is a tight empirical correlation between the disk centripetal acceleration and that expected from the baryonic component. The MDAR holds for most radii probed by disk kinematic tracers, regardless of galaxy mass or surface brightness. The relation has two characteristic accelerations; $a_0$, above which all galaxies are baryon-dominated; and $a_{\rm min}$, an effective minimum aceleration probed by kinematic tracers in isolated galaxies. We use a simple model to show that these trends arise naturally in $Λ$CDM. This is because: (i) disk galaxies in $Λ$CDM form at the centre of dark matter haloes spanning a relatively narrow range of virial mass; (ii) cold dark matter halo acceleration profiles are self-similar and have a broad maximum at the centre, reaching values bracketed precisely by $a_{\rm min}$ and $a_0$ in that mass range; and (iii) halo mass and galaxy size scale relatively tightly with the baryonic mass of a galaxy in any successful $Λ$CDM galaxy formation model. Explaining the MDAR in $Λ$CDM does not require modifications to the cuspy inner mass profiles of dark haloes, although these may help to understand the detailed rotation curves of some dwarf galaxies and the origin of extreme outliers from the main relation. The MDAR is just a reflection of the self-similar nature of cold dark matter haloes and of the physical scales introduced by the galaxy formation process.
description: 8 pages, 3 figures, MNRAS submitted
title: Superimposed diagenetic and hydrothermal processes – the key to high grade Zn mineralization in sedimentary basins
Creators: name: Magnall, Joseph Michael
name: Gleeson, Sarah Anne
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Clastic-dominant (CD-type) deposits typically comprise huge base metal and sulfur anomalies (> 106 tons) that are concentrated in a small number of Proterozoic and Phanerozoic basins. Some Phanerozoic deposits also contain barite in the succession hosting mineralization. Traditional models invoke sedimentary exhalative (SEDEX) processes to explain the formation of CD-type deposits, whereby metalliferous hydrothermal fluids were vented into a euxinic (H2S-bearing) water column, resulting in syn-sedimentary sulfide precipitation. Arguments for SEDEX activity are primarily associated with stratiform ore textures and highly positive δ34S values in pyrite. Recently, however, two Late Devonian CD-type deposits at Macmillan Pass (Selwyn Basin, Canada) have been the focus of 3 new approaches aimed at understanding how seawater paleoredox, diagenesis, and hydrothermal processes were interconnected: 1) Fe and Mo based paleoredox proxies provide evidence that anoxic non sulfidic (ferruginous) conditions were dominant during host rock deposition. 2) In situ δ34S values from pyrite and barite can be explained by diagenetic processes associated with the sulfate methane transition zone. 3) Detailed petrographic and fluid inclusion studies have described a comprehensive mineralogical paragenesis, whereby the introduction of hot (300°C) hydrothermal fluids into the shallow subsurface (<1-km depth) resulted in the thermal degradation of organic matter, barite dissolution, and sulfide mineralisation. Importantly, the Macmillan Pass deposits represent subseafloor replacement systems in which there was potential for positive feedbacks between diagenetic and hydrothermal processes, resulting in highly efficient ore-forming systems. These results are also relevant to other Phanerozoic basins in which stratiform barite deposits are spatially associated with sulfide mineralization.
Quantum enhancement of accuracy and precision in optical interferometry
Creators: name: Kaiser, Florian
name: Vergyris, Panagiotis
name: Aktas, Djeylan
name: Babin, Charles
name: Labonté, Laurent
name: Tanzilli, Sébastien
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: White-light interferometry is one of today's most precise tools for determining optical material properties. Achievable precision and accuracy are typically limited by systematic errors due to a high number of interdependent data fitting parameters. Here, we introduce spectrally-resolved quantum white-light interferometry as a novel tool for optical property measurements, notably chromatic dispersion in optical fibres. By exploiting both spectral and photon-number correlations of energy-time entangled photon pairs, the number of fitting parameters is significantly reduced which eliminates systematic errors and leads to an absolute determination of the material parameter. By comparing the quantum method to state-of-the-art approaches, we demonstrate the quantum advantage through 2.4 times better measurement precision, despite involving 62 times less photons. The improved results are due to conceptual advantages enabled by quantum optics which are likely to define new standards in experimental methods for characterising optical materials.
description: 9 pages, 5 figures
An Overview of Formulae for the Higher-Order Kinematics of Lower-Pair Chains with Applications in Robotics and Mechanism Theory
Creators: name: Mueller, Andreas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Numerical Analysis (math.NA)
subject: Dynamical Systems (math.DS)
subject: Group Theory (math.GR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The motions of mechanisms can be described in terms of screw coordinates by means of an exponential mapping. The product of exponentials (POE) describes the configuration of a chain of bodies connected by lower pair joints. The kinematics is thus given in terms of joint screws. The POE serves to express loop constraints for mechanisms as well as the forward kinematics of serial manipulators. Besides the compact formulations, the POE gives rise to purely algebraic relations for derivatives wrt. joint variables. It is known that the partial derivatives of the instantaneous joint screws (columns of the geometric Jacobian) are determined by Lie brackets the joint screws. Lesser-known is that derivative of arbitrary order can be compactly expressed by Lie brackets. This has significance for higher-order forward/inverse kinematics and dynamics of robots and multibody systems. Various relations were reported but are scattered in the literature and insufficiently recognized. This paper aims to provide a comprehensive overview of the relevant relations. Its original contributions are closed form and recursive relations for higher-order derivatives and Taylor expansions of various kinematic relations. Their application to kinematic control and dynamics of robotic manipulators and multibody systems is discussed.
Roteiro de vídeo: Adesão e atualização cadastral do PDDE
Creators: name: Diniz, Adriana Valéria Santos
name: Pereira, Maria Aparecida Nunes
Publisher: name: Zenodo
Year: 2023
Subjects: Roteiro de vídeo
PDDE
Adesão

description: Este relatório apresenta as atividades desenvolvidas no âmbito do Projeto “O Fortalecimento do Programa Dinheiro Direto na escola na região Nordeste como estratégia para a gestão democrática e para a qualidade da educação” – CECAMPE REGIÃO NORDESTE, referente à produção do vídeo “PDDE e Ações Integradas: Adesão e atualização cadastral”.
A simple comparison between Skorokhod & Russo-Vallois integration for insider trading
Creators: name: Escudero, Carlos
Publisher: name: arXiv
Year: 2017
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a simplified version of the problem of insider trading in a financial market. We approach it by means of anticipating stochastic calculus and compare the use of the Skorokhod and the Russo-Vallois forward integrals within this context. We conclude that, while the forward integral yields results with a clear financial meaning, the Skorokhod integral does not provide a suitable formulation for this problem.
Cut-touching linear functionals in the conformal bootstrap
Creators: name: Qiao, Jiaxin
name: Rychkov, Slava
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The modern conformal bootstrap program often employs the method of linear functionals to derive the numerical or analytical bounds on the CFT data. These functionals must have a crucial "swapping" property, allowing to swap infinite summation with the action of the functional in the conformal bootstrap sum rule. Swapping is easy to justify for the popular functionals involving finite sums of derivatives. However, it is far from obvious for "cut-touching" functionals, involving integration over regions where conformal block decomposition does not converge uniformly. Functionals of this type were recently considered by Mazac in his work on analytic derivation of optimal bootstrap bounds. We derive general swapping criteria for the cut-touching functionals, and check in a few explicit examples that Mazac's functionals pass our criteria.
description: 19 pages, 7 figures, v2: author order corrected, v3: full domain of 4pt analyticity made more precise, v4: misprint corrected and acknowledgement added
title: [Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Yd 2° 31 (1)]
title: Hallisches Schöffenbuch
titleType: AlternativeTitle
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1266
Subjects: subject: Halle (Saale)
subject: 090

description: 1r-2r Rechtsfälle (mehrere Hände, 3. Drittel 13. Jh., teils gestrichen) Nycolaus de Iyserenmengere is comen in geheget ding ... – ... des is vormunde Merclin. 2v Titulatur. In deme iare von goddes gebort ouer diusent iar, vnde twei hundert iar, vnde ses vnde sestich iar ... do worden vnse herren, de scepenen von Halle, des tuo rade, mit der borgere wilkore, dat se bescriven leten alle de gave, de uor gerichte vnde vor den scepenen gegeven worde ... – ... her Merkelin, heren Margwardes sone, her (unter der Liniierung von jüngerer Hand:) Jordan de Cruse, her Ekkehart biancte Jacobe, her Leuung. Der Nachtrag wiederholt in abgewandelter Folge die gelöschte Nennung derselben Namen Bl. 3r oben. 3r-125v Rechtsfälle. Conze Corze, de is comen in geheget ding ... – (57v) ... vnde derzu saz (lies: daz), he nu her unde ummir me gewinnet, sinem wibe vnde sin kindirn. (Rest der Seite leer) – (58r) leer, bis auf kursive Notiz, 15. Jh. (58v) Jacob von Queruuerde quam in ein geheit dink ... – ... dat der Oueliune kindere irclaget (von derselben Hand wie Nachtrag: vnde behalden) hebben mit rehte. Nachtrag: Pieder Neimk ... – ... des schal hie siek irholen an deme sakewaldigen von rechtes wegene. 44c Schaltzettel, datiert 1296. Korrekte Zuordnung des Zettels innerhalb der Handschrift unsicher. 44cr Bussen kindere Rokoles, beide sonde vnde dochtere ... – ... hir over haben sie gelovet vor iren bruder Konen zu werne. – 44cv leer.
Supplementary document for Monolithically integrated photonic crystal surface emitters on silicon with vortex beam by using bound states in the continuum - 6307058.pdf
Creators: name: Li, Haochuan
name: Tang, Mingchu
name: Zhou, Taojie
name: xie, Wentao
name: Li, Renjie
name: Gong, Yuanhao
name: MARTIN, MICKAEL
name: BARON, THIERRY
name: Chen, Siming
name: Liu, Huiyun
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: description of wafer structure
Constraint Answer Set Solver EZCSP and Why Integration Schemas Matter
Creators: name: Balduccini, Marcello
name: Lierler, Yuliya
Publisher: name: arXiv
Year: 2017
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Researchers in answer set programming and constraint programming have spent significant efforts in the development of hybrid languages and solving algorithms combining the strengths of these traditionally separate fields. These efforts resulted in a new research area: constraint answer set programming. Constraint answer set programming languages and systems proved to be successful at providing declarative, yet efficient solutions to problems involving hybrid reasoning tasks. One of the main contributions of this paper is the first comprehensive account of the constraint answer set language and solver EZCSP, a mainstream representative of this research area that has been used in various successful applications. We also develop an extension of the transition systems proposed by Nieuwenhuis et al. in 2006 to capture Boolean satisfiability solvers. We use this extension to describe the EZCSP algorithm and prove formal claims about it. The design and algorithmic details behind EZCSP clearly demonstrate that the development of the hybrid systems of this kind is challenging. Many questions arise when one faces various design choices in an attempt to maximize system's benefits. One of the key decisions that a developer of a hybrid solver makes is settling on a particular integration schema within its implementation. Thus, another important contribution of this paper is a thorough case study based on EZCSP, focused on the various integration schemas that it provides. Under consideration in Theory and Practice of Logic Programming (TPLP).
description: Under consideration in Theory and Practice of Logic Programming (TPLP)
Chasing the Intruder: A Reinforcement Learning Approach for Tracking Intruder Drones
Creators: name: Kainth, Shivam
name: Sahoo, Subham
name: Pal, Rajtilak
name: Jha, Shashi Shekhar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Drones are becoming versatile in a myriad of applications. This has led to the use of drones for spying and intruding into the restricted or private air spaces. Such foul use of drone technology is dangerous for the safety and security of many critical infrastructures. In addition, due to the varied low-cost design and agility of the drones, it is a challenging task to identify and track them using the conventional radar systems. In this paper, we propose a reinforcement learning based approach for identifying and tracking any intruder drone using a chaser drone. Our proposed solution uses computer vision techniques interleaved with the policy learning framework of reinforcement learning to learn a control policy for chasing the intruder drone. The whole system has been implemented using ROS and Gazebo along with the Ardupilot based flight controller. The results show that the reinforcement learning based policy converges to identify and track the intruder drone. Further, the learnt policy is robust with respect to the change in speed or orientation of the intruder drone.
Photoinduced filling of near nodal gap in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$
Creators: name: Zhang, Z.
name: Piovera, C.
name: Papalazarou, E.
name: Marsi, M.
name: d'Astuto, M.
name: van der Beek, C. J.
name: Taleb-Ibrahimi, A.
name: Perfetti, L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report time and angle resolved spectroscopic measurements in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$. The spectral function is monitored as a function of temperature, photoexcitation density and delay time from the pump pulse. According to our data, the superconducting gap becomes slightly stiffer when moving off the nodal direction. The nodal quasiparticles develop a faster dynamics when pumping the superconductor with a fluence that is large enough to induce the total collapse of the gap. We discuss the observed relaxation in terms of a dynamical reformation of Cooper pairs.
description: 6 pages, 7 figures
Cognition in a social world : assessing cognitive variation by sex and dominance status in Gambusia affinis and Astatotilapia burtoni
Creators: name: Wallace, Kelly Jean
name: 0000-0002-2361-1213
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Cognitive ecology
Social behavior

description: Social environments are a rich landscape in which individuals must make decisions that may have lasting impacts on condition, resource acquisition (including reproductive opportunities), and ultimately fitness. Often, these decisions require cognitive processes like learned associations, memory, and spatial navigation. Different social environments facilitate cognitive performance (for example, a species with expansive and highly-delineated territories may excel at spatial learning). Within a species, social phenotype (e.g. sex, reproductive state, dominance status) can drive variation in cognition, yet this variation is less explored. Why might social phenotypes differ in cognition? This variation can be driven both by the underlying ecological pressures and by the physiological and neuromolecular mechanisms associated with social behavior and decision-making. This dissertation expands our knowledge on the exciting and growing intersect between cognitive ecology and social neuroscience. This integration is described in a literature analysis in Chapter 1, where I first provide background on each field individually. I then describe the results of an analysis of publications over time for each field and for the subset of publications found in both fields. Lastly, I propose a set of steps for future work in this intersection, highlighting exemplary animal models and topics in this area. In the experimental chapters of my dissertation, I use a uniquely integrative approach to explore the relationship between social phenotype and cognition. In two fish species with well-characterized social dynamics (the western mosquitofish Gambusia affinis and burton’s mouthbrooder Astatotilapia burtoni, an African cichlid), I assess performance on a suite of cognitive tasks. In Chapters 2 & 3, I investigate how and why the sexes differ in cognition in the respective species. In Chapter 4 I investigate how changes in dominance status modulate cognition and behavior, integrating physiological analyses. Throughout, I employ multidimensional analyses that not only quantify performance but additionally assess cognitive style (the way an individual approaches a cognitive task, e.g. exploration, decision speed), providing a comprehensive perspective on the relationship between social behavior and cognition.
Measurement of the t t-bar production cross section using events with one lepton and at least one jet in pp collisions at sqrt(s) = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of the t t-bar production cross section at sqrt(s) = 13 TeV is presented using proton-proton collisions, corresponding to an integrated luminosity of 2.2 inverse femtobarns, collected with the CMS detector at the LHC. Final states with one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the accompanying jet multiplicity. From a likelihood fit to the invariant mass distribution of the isolated lepton and a jet identified as coming from the hadronization of a bottom quark, the cross section is measured to be sigma(t t-bar) = 888 +/- 2 (stat) +26 -28 (syst) +/- 20 (lumi) pb, in agreement with the standard model prediction. Using the expected dependence of the cross section on the pole mass of the top quark (m[t]), the value of m[t] is found to be 170.6 +/- 2.7 GeV.
description: Replaced with the published version. Added the journal reference and DOI. Includes updated results using the latest integrated luminosity measurement. All the figures and tables, including additional supplemental figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-16-006 (CMS Public Pages)
title: Speciation of Rare Earth Elements (REEs) in hydrothermal systems
Creators: name: Chattopadhyay, Rajorshi
name: Jahn, Sandro
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The Rare Earth Elements (REEs) are an important group of elements both geologically as well as economically. REEs find important applications in the fields of green energy, electric vehicles and electronics. They are also important tracers for geological processes under hydrothermal /high grade metamorphic conditions. The ability of fluids to mobilise the REEs depend on the chemical composition and the presence of suitable ligands like chloride, fluoride. Ab initio molecular dynamics simulations (AIMD) have been used to predict stability constants of various REE complexes and REE speciation under hydrothermal conditions (Stefanski and Jahn, 2020; Guan et al, 2020). However, AIMD simulations often suffer from significant finite time and size effects. Classical potentials on the other hand solve the problems of AIMD to some extent but they often oversimplify the description of atomic interactions. Several interesting phenomena like formation and breaking of bonds are not captured by classical potentials. Hence a good compromise would be to use ReaxFF (Duin et al. 2001). Another potential drawback of simple pairwise additive classical potentials is their implicit description of multipolar effects which play a significant role in solvation of ions in aqueous solvents. These multi-body effects become essential when dealing with multivalent ions, in concentrated solutions and in inter-facial environments (Tazi et al, 2012). Here, we discuss results from preliminary simulations with classical potentials (Migliorati et al. 2017). We demonstrate the finite size and finite time effects associated with AIMD and how classical potentials can be potentially used to overcome them.
High-resolution tracking in a GEM-Emulsion detector
Creators: name: Alexandrov, A.
name: Bencivenni, G.
name: Bertani, M.
name: Buonaura, A.
name: Capoccia, C.
name: Cibinetto, G.
name: De Lellis, G.
name: De Lucia, E.
name: Di Crescenzo, A.
name: Domenici, D.
name: Farinelli, R.
name: Felici, G.
name: Kitagawa, N.
name: Komatsu, M.
name: Morello, G.
name: Morishima, K.
name: Lener, M. Poli
name: Tioukov, V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: SHiP (Search for Hidden Particles) is a beam dump experiment proposed at the CERN SPS aiming at the observation of long lived particles very weakly coupled with ordinary matter mostly produced in the decay of charmed hadrons. The beam dump facility of SHiP is also a copious factory of neutrinos of all three kinds and therefore a dedicated neutrino detector is foreseen in the SHiP apparatus. The neutrino detector exploits the Emulsion Cloud Chamber technique with a modular structure, alternating walls of target units and planes of electronic detectors providing the time stamp to the event. GEM detectors are one of the possible choices for this task. This paper reports the results of the first exposure to a muon beam at CERN of a new hybrid chamber, obtained by coupling a GEM chamber and an emulsion detector. Thanks to the micrometric accuracy of the emulsion detector, the position resolution of the GEM chamber as a function of the particle inclination was evaluated in two configurations, with and without the magnetic field
Orthoptera RD, 2022
Creators: name: Cueto, Lewis
Publisher: name: Zenodo
Year: 2022
Subjects: Orthopteros

description: Este arcchivo contiene infomación utilizada para la practica numero dos de Biogeografia, sobre descarga de datos de GIBIF con R y QGIS. Los mismos, fueron depurados mediante la ejecucion de paquetes de la libreria de R para sus posteriores analisis.
On the number of solutions of some transcendental equations
Creators: name: Bergweiler, Walter
name: Eremenko, Alexandre
Publisher: name: arXiv
Year: 2017
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C15, 37F10

description: We give upper and lower bounds for the number of solutions of the equation $p(z)\log|z|+q(z)=0$ with polynomials $p$ and $q$.
description: 14 pages; some details added in v2
Pre- and postnatal brain hemodynamics in pregnancies at term: correlation with Doppler ultrasound, birthweight, and adverse perinatal outcome
Creators: name: Buca, Danilo
name: Liberati, Marco
name: Rizzo, Giuseppe
name: Gazzolo, Diego
name: Chiarelli, Francesco
name: Giannini, Cosimo
name: Di Tizio, Luciano
name: D’Adamo, Ebe
name: Nappi, Luigi
name: Scambia, Giovanni
name: D’Antonio, Francesco
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: To elucidate the correlation between pre- and postnatal cerebral Doppler in pregnancies close to term and to explore whether they are associated with perinatal outcome. Prospective study on singleton pregnancies at 36–37 weeks of gestation. The primary outcome was a composite score of perinatal morbidity, while secondary outcomes were adverse intra-partum outcome and abnormal acid–base status. All pregnancies underwent ultrasound assessment of umbilical artery (UA), middle cerebral artery (MCA), uterine arteries (UtAs) pulsatility index (PI), and cerebroplacental ratio (CPR). At birth, neonatal MCA PI was measured 72 h from delivery and correlated with prenatal Doppler, primary and secondary outcomes. Fisher’s test and multivariate logistic regression analysis were used to analyze the data. One hundred and sixty-six fetuses with both pre- and postnatal Doppler assessment of the MCA were included in the study. The risk of composite perinatal morbidity was higher in fetuses (OR: 5.7, 95% CI 2.2–14.6) and newborns (OR: 4.1, 95% CI 1.8–9.6) with fetal MCA PI < 10th centile. Likewise, the incidence of abnormal acid–base status was higher both in fetuses (20 versus 4.2%, p = .026) and newborns (17.1 versus 3.2%, p = .001) with a low MCA PI before and at birth, respectively. At logistic regression analysis, fetal and neonatal MCAPI were independently associated with composite perinatal morbidity and abnormal acid–base status, but not with adverse intra-partum outcome. In small for gestational age (SGA) fetuses, the incidence of composite perinatal morbidity was higher in fetuses and new-borns presenting compared to those not presenting with an MCA PI < 10th centile (61.5 versus 20%, p = .003 and 52.6% versus 7.1%, p = .008, respectively), while such association was lost when considering non-SGA fetuses. A low MCA PI is associated with adverse perinatal outcome in pregnancies at term and tends to persist after birth.