cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Holography of pp-waves in conformal gravity
Creators: name: Bhatnagar, A.
name: Lovrekovic, I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider holography of two pp-wave metrics in conformal gravity, their one point functions, and asymptotic symmetries. One of the metrics is a generalization of the standard pp-waves in Einstein gravity to conformal gravity. The holography of this metric shows that within conformal gravity one can have realised solution which has non-vanishing partially massless response (PMR) tensor even for vanishing subleading term in the Fefferman-Graham expansion (i.e. Neumann boundary conditions), and vice-versa.
description: 12 pages, 3 figures
Addressing structural inequalities in research information
Creators: name: Alperin, Juan Pablo
Publisher: name: Zenodo
Year: 2024
Subjects: Barcelona Declaration on Open Research Information

description: It is well known that OpenAlex is a more inclusive source of research information than any of the closed alternatives. Their more inclusive indexing policy should be celebrated, as it opens the possibility of research assessment that legitimately considers all research—regardless of where it is published. This is a key promise and opportunity of relying on open research information, but for this promise to be fulfilled, it needs to be a core part of the work of all the Barcelona Declaration signatories. This presentation will show, through the analysis of over 45,000 journals published using PKP’s OJS, that there are structural inequalities in access to scholarly infrastructures that, despite best efforts, are keeping thousands of journals from being included. In our analysis, we found that journals that assign DOIs are more likely to be indexed, but that around 15,000 journals assign them incorrectly (i.e., their DOIs do not resolve); others are using DataCite DOIs, because they are cheaper, but contain less detailed metadata. In addition, very few journals using OJS share their references through Crossref, leading to misrepresentation of their circulation in the literature. An open database like OpenAlex allows us to study and address these limitations, but we cannot expect data improvements to only be made by and for those whose institutions have the resources to do so. Working towards developing open research information systems is an opportunity to address structural information inequities. Doing so will require a proactive effort to improve the availability of research information from communities that have been historically excluded—not just from our own.
description: Presentation at the Paris Conference on Open Research Information (Sept 23-24 2024) in Session 6: Infrastructures II
On the Contribution of AGN to the Cosmic Background Radiation
Creators: name: Ballantyne, D. R.
name: Papovich, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of calculations of the cosmic AGN background spectrum from 3 keV (4\times 10^{-4} microns) to 1000 microns. These computations make use of the measured X-ray luminosity function and its evolution, as well as fits from synthesis models of the cosmic X-ray background (CXB) to predict the AGN contribution to the cosmic infrared background (CIRB) for different models of the location and distribution of the absorbing material. By comparing our results to observational constraints we conclude that the current deep Spitzer surveys can account for the entire AGN contribution to the CIRB at 24 microns, but these AGN are almost all Compton-thin. In fact, the calculations show that Compton-thick AGN are a small fraction of the CIRB for λ< 100 microns. For this reason, the most efficient method of identifying the Compton-thick AGN population is through hard X-ray imaging at energies >~ 40 keV. Selection of AGN based on their rest-frame near-IR colors will miss low luminosity type 2 AGN due to contamination from the host galaxy. Finally, the AGN that dominate the CXB must have star formation rates < 100 M_{sun} yr^{-1}, consistent with them having similar properties as the sources which dominate the CIRB at z ~1. Including the estimated re-radiated emission from star formation, AGN and their host galaxies may contribute ~30% of the CIRB at 70 microns, dropping to ~10% at 24 microns and ~1% at 1-10 microns.
description: 7 pages, 4 figures, 3 in colour, accepted by ApJ
Numerical spectral synthesis of breather gas for the focusing nonlinear Schrödinger equation
Creators: name: Roberti, Giacomo
name: El, Gennady
name: Tovbis, Alexander
name: Copie, François
name: Suret, Pierre
name: Randoux, Stéphane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We numerically realize breather gas for the focusing nonlinear Schrödinger equation. This is done by building a random ensemble of N $\sim$ 50 breathers via the Darboux transform recursive scheme in high precision arithmetics. Three types of breather gases are synthesized according to the three prototypical spectral configurations corresponding the Akhmediev, Kuznetsov-Ma and Peregrine breathers as elementary quasi-particles of the respective gases. The interaction properties of the constructed breather gases are investigated by propagating through them a "trial" generic breather (Tajiri-Watanabe) and comparing the mean propagation velocity with the predictions of the recently developed spectral kinetic theory (El and Tovbis, PRE 2020).
[Field notebook XX]
Creators: name: George, Mary
name: Paul, Tommy
name: Davis, John H.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: coo

description: 1 PDF file. Researcher indicates overall page range as 1097-1186. Earliest date in notebook is August 29, 1973; April 1978 dates are not specified.
Parametric amplification of topological interface states in synthetic Andreev bands
Creators: name: Septembre, Ismael
name: Koniakhin, Sergei
name: Meyer, Julia
name: Solnyshkov, Dmitry
name: Malpuech, Guillaume
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A driven-dissipative nonlinear photonic system (e.g. exciton-polaritons) can operate in a gapped superfluid regime. We theoretically demonstrate that the reflection of a linear wave on this superfluid is an analogue of the Andreev reflection of an electron on a superconductor. A normal region surrounded by two superfluids is found to host Andreev-like bound states. These bound states form topological synthetic bands versus the phase difference between the two superfluids. Changing the width of the normal region allows to invert the band topology and to create "interface" states. Instead of demonstrating a linear crossing, synthetic bands are attracted by the non-linear non-Hermitian coupling of bosonic systems which gives rise to a self-amplified strongly occupied topological state.
A Physical Model for Co-evolution of QSOs and of their Spheroidal Hosts
Creators: name: De Zotti, G.
name: Shankar, F.
name: Lapi, A.
name: Granato, G. L.
name: Silva, L.
name: Cirasuolo, M.
name: Salucci, P.
name: Danese, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: At variance with most semi-analytic models, in the Anti-hierarchical Baryon Collapse scenario (Granato et al. 2001, 2004) the main driver of the galaxy formation and evolution is not the merging sequence but are baryon processes. This approach emphasizes, still in the framework of the hierarchical clustering paradigm for dark matter halos, feedback processes from supernova explosions and from active nuclei, that tie together star formation in spheroidal galaxies and the growth of black holes at their centers. We review some recent results showing the remarkably successful predictive power of this scenario, which allows us to account for the evolution with cosmic time of a broad variety of properties of galaxies and active nuclei, which proved to be very challenging for competing models.
description: Invited talk at the Specola Vaticana Workshop on "AGN and Galaxy Evolution", Castel Gandolfo, 3-6 October 2005, 10 pages, 2 figures
Exotic modes of excitation in atomic nuclei far from stability
Creators: name: Paar, N.
name: Vretenar, D.
name: Khan, E.
name: Colo, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We review recent studies of the evolution of collective excitations in atomic nuclei far from the valley of $β$-stability. Collective degrees of freedom govern essential aspects of nuclear structure, and for several decades the study of collective modes such as rotations and vibrations has played a vital role in our understanding of complex properties of nuclei. The multipole response of unstable nuclei and the possible occurrence of new exotic modes of excitation in weakly-bound nuclear systems, present a rapidly growing field of research, but only few experimental studies of these phenomena have been reported so far. Valuable data on the evolution of the low-energy dipole response in unstable neutron-rich nuclei have been gathered in recent experiments, but the available information is not sufficient to determine the nature of observed excitations. Even in stable nuclei various modes of giant collective oscillations had been predicted by theory years before they were observed, and for that reason it is very important to perform detailed theoretical studies of the evolution of collective modes of excitation in nuclei far from stability. We therefore discuss the modern theoretical tools that have been developed in recent years for the description of collective excitations in weakly-bound nuclei. The review focuses on the applications of these models to studies of the evolution of low-energy dipole modes from stable nuclei to systems near the particle emission threshold, to analyses of various isoscalar modes, those for which data are already available, as well as those that could be observed in future experiments, to a description of charge-exchange modes and their evolution in neutron-rich nuclei, and to studies of the role of exotic low-energy modes in astrophysical processes.
description: 123 pages, 59 figures, submitted to Reports on Progress in Physics
MetalRem As Technology - Application of sulfidated nano zerovalent iron for immobilization of arsenic in contaminated  soil
Creators: name: Vaňková, Zuzana
name: Lhotský, Ondřej
name: Komárek, Michael
name: Raaen, Steinar
name: Ndungu, Kuria
name: Semerád, Jaroslav
Publisher: name: Zenodo
Year: 2024

description: Technical note for MetalRem As Technology - Application of sulfidated nano zerovalent iron for immobilization of arsenic in contaminated  soil
ORCID iD Icons
Creators: name: ORCID
Publisher: name: ORCID
Year: 2024
Subjects: classificationCode: 460999
subject: Information systems not elsewhere classified

description: Using the ORCID iD icons, buttons, and styling helps to build a consistent ORCID user experience across different integrations. ORCID is now using a Digital Asset Management platform to host our icons and graphical assets to ensure our users have access to the most current versions available. Icons for display, as well as other graphics and outreach resources, can now be found in our Brand Library.Review ORCID's User Experience Display Guidelines here.Review ORCID's Brand Guidelines here.
Next-to-leading order spin-orbit effects in the equations of motion, energy loss and phase evolution of binaries of compact bodies in the effective field theory approach
Creators: name: Pardo, Brian A.
name: Maia, Natália T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute spin-orbit effects in the equations of motion, binding energy and energy loss of binary systems of compact objects at the next-to-leading order in the post-Newtonian (PN) approximation in the effective field theory (EFT) framework. We then use these quantities to compute the evolution of the orbital frequency and accumulated orbital phase including spin-orbit effects beyond the dominant order. To obtain the results presented in this paper, we make use of known ingredients in the EFT literature, such as the potential and the multipole moments with spin effects at next-to-leading order, and which are given in the linearized harmonic gauge and with the spins in the locally flat frame. We also obtain the correction to the center-of-mass frame caused by spin-orbit effects at next-to-leading order. We demonstrate the equivalence between our EFT results and those which were obtained elsewhere using different formalisms. The results presented in this paper provide us with the final ingredients for the construction of theoretical templates for gravitational waves including next-to-leading order spin-orbit effects, which will be presented in a future publication.
description: 19 pages, 1 figure
Imaging ac losses in superconducting films via scanning Hall probe microscopy
Creators: name: Dinner, Rafael B.
name: Moler, Kathryn A.
name: Feldmann, D. Matthew
name: Beasley, M. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Various local probes have been applied to understanding current flow through superconducting films, which are often surprisingly inhomogeneous. Here we show that magnetic imaging allows quantitative reconstruction of both current density, J, and electric field, E, resolved in time and space, in a film carrying subcritical ac current. Current reconstruction entails inversion of the Biot-Savart law, while electric fields are reconstructed using Faraday's law. We describe the corresponding numerical procedures, largely adapting existing work to the case of a strip carrying ac current, but including new methods of obtaining the complete electric field from the inductive portion determined by Faraday's law. We also delineate the physical requirements behind the mathematical transformations. We then apply the procedures to images of a strip of YBa2Cu3O7 (YBCO) carrying an ac current at 400 Hz. Our scanning Hall probe microscope produces a time-series of magnetic images of the strip with 1 micron spatial resolution and 25 microsecond time resolution. Combining the reconstructed J and E, we obtain a complete characterization including local critical current density, E-J curves, and power losses. This analysis has a range of applications from fundamental studies of vortex dynamics to practical coated conductor development.
description: 13 pages, 8 figures. Submitted to Physical Review B. Movies and higher resolution figures at http://www.stanford.edu/group/moler/rdinner
An enhanced VEM formulation for plane elasticity
Creators: name: D'Altri, A. M.
name: de Miranda, S.
name: Patruno, L.
name: Sacco, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper, an enhanced Virtual Element Method (VEM) formulation is proposed for plane elasticity. It is based on the improvement of the strain representation within the element, without altering the degree of the displacement interpolating functions on the element boundary. The idea is to fully exploit polygonal elements with a high number of sides, a peculiar VEM feature, characterized by many displacement degrees of freedom on the element boundary, even if a low interpolation order is assumed over each side. The proposed approach is framed within a generalization of the classic VEM formulation, obtained by introducing an energy norm in the projection operator definition. Although such generalization may mainly appear to have a formal value, it allows to effectively point out the mechanical meaning of the quantities involved in the projection operator definition and to drive the selection of the enhanced representations. Various enhancements are proposed and tested through several numerical examples. Numerical results successfully show the capability of the enhanced VEM formulation to (i) considerably increase accuracy (with respect to standard VEM) while keeping the optimal convergence rate, (ii) bypass the need of stabilization terms in many practical cases, (iii) obtain natural serendipity elements in many practical cases, and (vi) effectively treat also nearly incompressible materials.
description: 27 pages, 6 figures
Non-trivial black hole solutions in $\mathit{f(R)}$ gravitational theory
Creators: name: Nashed, G. G. L.
name: Nojiri, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent observation shows that general relativity (GR) is not valid in the strong regime. $\mathit{f(R)}$ gravity where $\mathit{R}$ is the Ricci scalar, is regarded to be one of good candidates able to cure the anomalies appeared in the conventional general relativity. In this realm, we apply the equation of motions of $\mathit{f(R)}$ gravity to a spherically symmetric spacetime with two unknown functions and derive original black hole (BH) solutions without any constrains on the Ricci scalar as well as on the form of $\mathit{f(R)}$ gravity. Those solutions depend on a convolution function and are deviating from the Schwarzschild solution of the Einstein GR. These solutions are characterized by the gravitational mass of the system and the convolution function that in the asymptotic form gives extra terms that are responsible to make such BHs different from GR. Also, we show that these extra terms make the singularities of the invariants much weaker than those of the GR BH. We analyze such BHs using the trend of thermodynamics and show their consistency with the well known quantities in thermodynamics like the Hawking radiation, entropy and quasi-local energy. We also show that our BH solutions satisfy the first law of thermodynamics. Moreover, we study the stability analysis using the odd-type mode and shows that all the derived BHs are stable and have radial speed equal to one. Finally, using the geodesic deviations we derive the stability conditions of these BHs.
description: 21 pages, 21 figures, will appear in Phys. Rev. D. arXiv admin note: text overlap with arXiv:2010.04701
The Unsteady Flow of a Carreau Fluid Through Inclined Catheterized Arteries Having a Balloon with Time-Variant Overlapping Stenosis
Creators: name: Khaled Saad MEKHEIMER, Faiza SALAMA
Publisher: name: Walailak University
Year: 2015
Subjects: Carreau fluid, catheterized arterie, overlappings stenosis, unsteady flow, blood flow

description: 10, 12, Walailak Journal of Science and Technology
Volume modulus inflation and a low scale of SUSY breaking
Creators: name: Badziak, M.
name: Olechowski, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The relation between the Hubble constant and the scale of supersymmetry breaking is investigated in models of inflation dominated by a string modulus. Usually in this kind of models the gravitino mass is of the same order of magnitude as the Hubble constant which is not desirable from the phenomenological point of view. It is shown that slow-roll saddle point inflation may be compatible with a low scale of supersymmetry breaking only if some corrections to the lowest order Kahler potential are taken into account. However, choosing an appropriate Kahler potential is not enough. There are also conditions for the superpotential, and e.g. the popular racetrack superpotential turns out to be not suitable. A model is proposed in which slow-roll inflation and a light gravitino are compatible. It is based on a superpotential with a triple gaugino condensation and the Kahler potential with the leading string corrections. The problem of fine tuning and experimental constraints are discussed for that model.
description: 28 pages, 8 figures, comments and references added, minor change in notation, version to be published
Effect of Radiation and Magnetohydrodynamic Free Convection Boundary Layer Flow on a Solid Sphere with Convective Boundary Conditions
Creators: name: Hamzeh Taha ALKASASBEH, Mohd Zuki SALLEH
Publisher: name: Walailak University
Year: 2015
Subjects: Convective boundary conditions, free convection, magnetohydrodynamic, radiation effects, solid sphere

description: 9, 12, Walailak Journal of Science and Technology
The making of a number: Counting attempted and completed killings of women in the domestic sphere. A Swiss scenario on femicides
Creators: name: Frei, Andrea Isabel
Publisher: name: Zenodo
Year: 2022

description: The term ‘femicide’ has recently gained international attention, and is also mainstreaming into the Swiss public debate. Thanks to the eforts of local NGOs and some political voices, the demand for an offcial count of the number of femicides in Switzerland is loud and clear. Both the concept of femicide and the demand for data on violence against women in general are not feeting signs of the times, but built on decades-long activism and work. A statistical representation of the social phenomenon of femicide would represent far more than just an administrative concession to current activism; statistics inform the public, guide political actions, and ultimately represent a common agreement on the reality of the measured object. Conclusively, a diferent category implies a diferent reality. An exploratory dive into the making of ‘attempted and completed killings in the domestic sphere’ that are currently counted in the police crime statistics (the closest count to femicide) reveals how a conventional understanding of the measured violence translates into a practice of category application that impacts the explanatory power of the numbers. A translation that starts at the origin of any data on such violence, with the frst report to the police. Applications of e.g. ‘domestic’ and ‘attempted’ are based on negotiated conditions that depend, in turn, on the perception of and signifcance attributed to the measured social phenomenon. Essentially, killings in the domestic sphere and femicide diverge in the recognition of their root causes. Nonetheless, crime data not only ofer potential to explore femicides, the adoption of the term as a new statistical category could also advance the fundamental way of observing violence against women based on systematic and persistent gender inequality.
Management Control and Performance Measurement Systems: How Servitization Teaches an Old Dog New Tricks
Creators: name: Giordino, Daniele
name: Culasso, Francesca
name: Manzi, Luca Maria
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: servitization, management control, performance measurement, small and medium sized enterprises, levers of control

description: Purpose

 The purpose of the paper is to study how servitization affects the management control and performance measurement systems of small and medium sized manufacturing enterprises.

 Design

 This study utilizes a multiple case study approach. Semi structured interviews were carried out with 43 professionals such as owners, managers, and controllers from 31 different manufacturing firms located in Italy.

 Findings

 The study’s findings reveal changes associated with the companies’ beliefs systems, boundary systems, diagnostic systems and interactive systems of MC and PM. Additionally, we identified the following challenges faced by MC and PM systems during the servitization process: establishing a balance between efficiency and flexibility, balancing control and autonomy, balancing existing and new knowledge, tensions between short and long term strategic goals and, finally, information sharing from stakeholders.

 Originality

 Little attention has been put towards the investigation of how the servitization strategy does change management control (MC) and performance measurement (PM) of small and medium sized enterprises (SMEs). Moreover, additional empirical evidence of the paradoxes created by the servitization strategy from a MC and PM systems perspective is necessary to better understand the servitization phenomenon.

 Research implications

 The study augments prior literature by providing additional empirical evidence of the effects that servitization has on MC and PM systems. Moreover, this research utilizes the levers of control (LOC) framework thus empowering future studies to adopt a similar framework to investigate larger corporations with more structured MC and PM systems.
description: Economia Aziendale Online -, Vol 14, No 4 (2023): ISSUE 4/2023
A note on relative duality for Voevodsky motives
Creators: name: Barbieri-Viale, Luca
name: Kahn, Bruno
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let X be an n-dimensional smooth proper variety over a field admitting resolution of singularities, and Y,Z two disjoint closed subsets of X. We establish an isomorphism M(X-Z,Y) isomorphic to M(X-Y,Z)^*(n)[2n] in Voevodsky's triangulated category of geometric motives. Here, M(X-Z,Y) is the motive of X -Z relative to its closed subset Y.
Effects of Radiation and Chemical Reaction on MHD Convective Flow over a Permeable Stretching Surface with Suction and Heat Generation
Creators: name: Penem Mohan KRISNA, Naramgari SANDEEP
Publisher: name: Walailak University
Year: 2015
Subjects: Thermal radiation, MHD, convection, chemical reaction, heat generation

description: 9, 12, Walailak Journal of Science and Technology
Star formation history of the solar neighbourhood as told by Gaia
Creators: name: Alzate, Jairo A.
name: Bruzual, Gustavo
name: Díaz-González, Daniel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Gaia DR2 catalog is the best source of stellar astrometric and photometric data available today. The history of the Milky Way galaxy is written in stone in this data set. Parallaxes and photometry tell us where the stars are today, when were they formed, and with what chemical content, i.e. their star formation history (SFH). We develop a Bayesian hierarchical model suited to reconstruct the SFH of a resolved stellar population. We study the stars brighter than $G\,=\,15$ within 100 pc of the Sun in Gaia DR2 and derive a SFH of the solar neighbourhood in agreement with previous determinations and improving upon them because we detect chemical enrichment. Our results show a maximum of star formation activity about 10 Gyr ago, producing large numbers of stars with slightly below solar metallicity (Z=0.014), followed by a decrease in star formation up to a minimum level occurring around 8 Gyr ago. After a quiet period, star formation rises to a maximum at about 5 Gyr ago, forming stars of solar metallicity (Z=0.017). Finally, star formation has been decreasing until the present, forming stars of Z=0.03 at a residual level. We test the effects introduced in the inferred SFH by ignoring the presence of unresolved binary stars in the sample, reducing the apparent limiting magnitude, and modifying the stellar initial mass function.
description: 33 pages, 28 figures
Thermo-Diffusion and Chemical Reaction Effects on MHD Three Dimensional Free Convective Couette Flow
Creators: name: Jagdish PRAKASH, Kuppareddy Subramanyam BALAMURUGAN
Publisher: name: Walailak University
Year: 2015
Subjects: Magnetic field, heat transfer, mass transfer, thermo-diffusion, chemical reaction

description: 9, 12, Walailak Journal of Science and Technology
Some homological properties of category $\mathcal{O}$, VI
Creators: name: Ko, Hankyung
name: Mazorchuk, Volodymyr
name: Mrđen, Rafael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: This paper explores various homological regularity phenomena (in the sense of Auslander) in category $\mathcal{O}$ and its several variations and generalizations. Additionally, we address the problem of determining projective dimension of twisted and shuffled projective and tilting modules.
Educadoras de la Comunidad Negociando Conocimiento: A Latinx Critical and Testimonio Approach
Creators: name: Maravilla, Joanna V
Publisher: name: University of Illinois at Chicago
Year: 2020
Subjects: Uncategorized

description: This dissertation is a qualitative research case study of three Latina educadoras. The data analyzed comes from a larger research study (PROJECT) focused on teacher professional development aimed at incorporating emergent bilingual students’ funds of knowledge in the development of curriculum that promotes greater equitable outcomes. With data consisting of individual and focus group interviews and videotaped lessons focused on mathematics and science concepts, I use Latinx critical race (LatCrit) theory and testimonio as my theoretical and methodological approach (Bernal, Burciaga & Carmona, 2012) to explore how race, identity, and power mediate a culturally relevant and inclusive curriculum in the Little Village neighborhood of Chicago. Through the telling of their testimonios through the lens of their own racial, linguistic, and matemáticas learning experiences, Latina educadoras position their understanding, struggle with, and development of their notions of what it means to teach Latinx emergent bilingual (LEB) students within the space of matemáticas. I explored the following questions: 1) How do Latina educadoras use their Latinx emergent bilingual and matemáticas identity-shaping experiences to inform the way they teach matemáticas to their Latinx emergent bilingual students? 2) How do Latina educadoras’ identity-shaping experiences lead to instruction that promotes students to see themselves as learners and doers of matemáticas (Martin, 2012) over time? Through the analysis of both their testimonios and practica, I argue that all three Latina educadoras demonstrated moving beyond the idea of teaching as politically neutral to understand their teaching as a political practice (Gutierrez, 2013). Three emergent themes resulted: the centrality of community cultural wealth, identidad, and language as wealth in the teaching of the Latina educadoras. Through their self-reconstructed identidades, these educadoras better understood how to connect their curriculum to LEB students’ everyday practices outside of the classroom, as well as more fully assess their students’ comprehension of matemáticas. Implications include the need for more research on Latinx teachers who identify as teaching in communities where they are from, research on how the act of testimonio can impact teachers’ pedagogy, and research on the incorporation of students’ community funds of knowledge into the curriculum in order to support the construction of powerful mathematical identities in LEB students.
Autonomous Hybrid Ground/Aerial Mobility in Unknown Environments
Creators: name: Fan, David D.
name: Thakker, Rohan
name: Bartlett, Tara
name: Miled, Meriem Ben
name: Kim, Leon
name: Theodorou, Evangelos
name: Agha-mohammadi, Ali-akbar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Hybrid ground and aerial vehicles can possess distinct advantages over ground-only or flight-only designs in terms of energy savings and increased mobility. In this work we outline our unified framework for controls, planning, and autonomy of hybrid ground/air vehicles. Our contribution is three-fold: 1) We develop a control scheme for the control of passive two-wheeled hybrid ground/aerial vehicles. 2) We present a unified planner for both rolling and flying by leveraging differential flatness mappings. 3) We conduct experiments leveraging mapping and global planning for hybrid mobility in unknown environments, showing that hybrid mobility uses up to five times less energy than flying only.
EXPEDIENTES DO GESTOR ESCOLAR NA CONSTRUÇÃO DA AUTONOMIA
Creators: name: Antoniclebio Cavalcante Eça, Claudio Pinto Nunes
Publisher: name: Zenodo
Year: 2022
Subjects: Construção da autonomia. Gestão escolar. Políticas públicas educacionais.

description: O trabalho de produção científica tem como objetivo, analisar a partir dos expedientes do gestor escolar, como se dá a construção da autonomia e os desafios na implantação das políticas públicas educacionais que orientam e regulam o processo democrático dentro do contexto das escolas públicas.
NIRS analysis of intact grass silage and fresh grass for the prediction of dry matter, crude protein and acid detergent fibre
Creators: name: Kennedy, Carol Ann
Publisher: name: University of British Columbia
Year: 2009

description: Diverse fresh grass and grass silage samples (n = 292) were collected from 138 dairy farms in southwestern British Columbia, Canada. Sources of variation within the forage sample population included different crop years, harvests, grass species, ensiling additives and storage facilities. These samples were used to determine the accuracy of near infrared reflectance spectroscopy (MRS) for predicting the feeding value of undried, unground fresh grass and grass silage. NIRS spectra were collected from intact samples with a NIRSystems 6500 scanning monochromator instrument followed by analyses for dry matter (DM), crude protein (CP), acid detergent fibre (ADF), and fermentation end-products (lactic, acetic, propionic, isobutyric, butyric, isovaleric, and valeric acids) by conventional chemical laboratory procedures. The means and standard deviations of the sample population were 34.7 and 13.0% for DM, 17.1 and 3.5% for CP, and 34.3 and 3.9% for ADF when corrected to a moisture-free basis. The calibration set (n =216) was selected by spectral variation using the "neighbourhood Ff" method and the spectral duplicates were assigned to the validation set (n = 67). Prediction equations were developed with modified partial least square regression and cross validation utilizing different scatter treatments, derivatives and wavelength segments. The calibration R2 and standard errors of cross validation (SECV) for DM, CP, and ADF corrected to a moisture-free basis were 1.00 and 1.15%, 0.95 and 1.05%, and 0.95 and 1.16%, respectively. Standard errors of performance (SEP), means, and coefficients of variability (SEP* 100 ⌯ mean) for the validation set were 0.73, 27.2 and 2.69% for DM, 0.79, 15.7 and 5.03% for CP, and 0.95, 34.5 and 2.75% for ADF. The errors associated with the equations developed for the short chain organic acids were unacceptably high. Prediction equations were also developed on reference values calculated on an "as received" basis. Different procedures for calibration and validation set selection were compared with no one common method producing the lowest error on all constituents. It was concluded that the NIRS prediction equation for DM produced excellent accuracy as indicated by the low SECV and SEP. The prediction equations for CP and ADF had acceptable accuracy for monitoring forage nutrient quality for livestock ration balancing programs. The NIRS method of analysis will provide forage quality information faster and at a reduced cost compared to conventional chemical procedures.
Giovani e partecipazione pubblica per lo sviluppo sostenibile locale: un’analisi comparativa delle città metropolitane italiane
Creators: name: Andreea Chiper, Ribana
name: Di Gerio, Chiara
name: Fiorani, Gloria
Publisher: name: ----
Year: 2023
Subjects: giovani, partecipazione pubblica, stakeholder engagement, sviluppo sostenibile locale, città metropolitane, piano strategico metropolitano

description: Il Piano Strategico Metropolitano (PMS) è lo strumento attraverso il quale le città metropolitane italiane delineano gli interventi prioritari per favorire il progresso economico, socio-ambientale e culturale del territorio. In tale accezione, la partecipazione della società civile, soprattutto della fascia più giovane, nei processi di governance e di elaborazione di politiche per lo sviluppo sostenibile permette di rafforzare la relazione tra le istituzioni locali e le giovani generazioni, introducendo un reale cambiamento di paradigma orientato alla collaborazione multilivello. L’obiettivo del paper è pertanto quello di indagare l’ampiezza della partecipazione pubblica dei giovani in ambito di strategie di sviluppo sostenibile metropolitano (livello locale). L’analisi, condotta a partire dalle fonti secondarie elaborate dal campione, ha determinato l’individuazione delle pratiche di coinvolgimento adottate da ognuna delle 14 città metropolitane italiane, al fine di valutarne lo stato dell’arte e stabilirne analogie e differenze, anche rispetto i livelli di engagement presenti in letteratura. Sebbene la quasi totalità abbia intrapreso un processo di coinvolgimento dei giovani tale ricerca evidenzia come solo 6 città metropolitane su 14 - corrispondenti al 43% - hanno promosso forme ad elevata intensità di engagement, evidenziando una totale assenza di impiego dell’approccio ricorsivo, in cui le giovani generazioni sono costantemente parte integrante delle strategie di sostenibilità.
description: ----, Vol 14, No 4 (2023): ISSUE 4/2023
[Field notebook XIX]
Creators: name: Dominic, Jim
name: George, John
name: George, Mary
name: Mitchell, Joe
name: Paul, Tommy
name: Wilson, Ambrose
name: Davis, John H.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: coo

description: 1 PDF file. Researcher indicates overall page range as 1023-1096. Initials "J.D." stand for the researcher.
Polynomial scheme for time evolution of open and closed quantum systems
Creators: name: Jing, Jun
name: Ma, H. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on the generation function of Laguerre polynomials, We proposed a new Laguerre polynomial expansion scheme in the calculation of evolution of time dependent Schrödinger equation. Theoretical analysis and numerical test show that the method is equally as good as Chebyshev polynomial expansion method in efficiency and accuracy, with extra merits that no scaling to Hamiltonian is needed and wider suitability.
description: 19 pages, 6 figures, Phys.Rev.E (accepted)
Functional Integral Construction of the Thirring model: axioms verification and massless limit
Creators: name: Benfatto, G.
name: Falco, P.
name: Mastropietro, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct a QFT for the Thirring model for any value of the mass in a functional integral approach, by proving that a set of Grassmann integrals converges, as the cutoffs are removed and for a proper choice of the bare parameters, to a set of Schwinger functions verifying the Osterwalder-Schrader axioms. The corresponding Ward Identities have anomalies which are not linear in the coupling and which violate the anomaly non-renormalization property. Additional anomalies are present in the closed equation for the interacting propagator, obtained by combining a Schwinger-Dyson equation with Ward Identities.
description: 55 pages, 9 figures
A CNN-based Feature Space for Semi-supervised Incremental Learning in Assisted Living Applications
Creators: name: Scheck, Tobias
name: Grassi, Ana Perez
name: Hirtz, Gangolf
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: A Convolutional Neural Network (CNN) is sometimes confronted with objects of changing appearance ( new instances) that exceed its generalization capability. This requires the CNN to incorporate new knowledge, i.e., to learn incrementally. In this paper, we are concerned with this problem in the context of assisted living. We propose using the feature space that results from the training dataset to automatically label problematic images that could not be properly recognized by the CNN. The idea is to exploit the extra information in the feature space for a semi-supervised labeling and to employ problematic images to improve the CNN's classification model. Among other benefits, the resulting semi-supervised incremental learning process allows improving the classification accuracy of new instances by 40% as illustrated by extensive experiments.
description: Accepted in VISAPP 2020
Polymer translocation through a nanopore - a showcase of anomalous diffusion
Creators: name: Dubbeldam, J. L. A.
name: Milchev, A.
name: Rostiashvili, V. G.
name: Vilgis, T. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The translocation dynamics of a polymer chain through a nanopore in the absence of an external driving force is analyzed by means of scaling arguments, fractional calculus, and computer simulations. The problem at hand is mapped on a one dimensional {\em anomalous} diffusion process in terms of reaction coordinate $s$ (i.e. the translocated number of segments at time $t$) and shown to be governed by an universal exponent $α= 2/(2ν+2-γ_1)$ whose value is nearly the same in two- and three-dimensions. The process is described by a {\em fractional} diffusion equation which is solved exactly in the interval $0 $, and $ - < s(t)>^2$ which provide full description of the diffusion process. The comparison of the analytic results with data derived from extensive Monte Carlo (MC) simulations reveals very good agreement and proves that the diffusion dynamics of unbiased translocation through a nanopore is anomalous in its nature.
description: 5 pages, 3 figures, accepted for publication in Phys. Rev. E
Tassi di Interesse Negativi e Performance Assicurative: Uno Studio Comparato tra Generali e Unipolsai
Creators: name: Musella, Alessio Maria
name: Cangiano, Nicoletta
Publisher: name: ----
Year: 2023
Subjects: compagnie assicurative, tassi di interesse negativi, strategie di gestione aziendale, analisi comparativa delle performance, agilità organizzativa

description: Il paper esamina gli effetti della forte volatilità dei tassi di interesse sul settore assicurativo. Attraverso la comparazione di due casi studio, relativi all’analisi delle performance di due compagnie assicurative italiane, Generali Assicurazioni SpA e UnipolSai Assicurazioni SpA, gli autori propongono di esplorare come l’imposizione di tassi di interesse negativi, avvenuta nel triennio 2016-2018, abbia influito sul sistema organizzativo delle due società. Analizzando i report delle due imprese di assicurazione, si valuteranno le più importanti misure strategiche che queste hanno adottato per far fronte agli impatti derivanti da un cambiamento radicale dello scenario macroeconomico, mai verificatosi precedentemente.
description: ----, Vol 14, No 4 (2023): ISSUE 4/2023
Gravitationally induced uncertainty relations in curved backgrounds
Creators: name: Petruzziello, Luciano
name: Wagner, Fabian
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper aims at investigating the influence of space-time curvature on the uncertainty relation. In particular, relying on previous findings, we assume the quantum wave function to be confined to a geodesic ball on a given space-like hypersurface whose radius is a measure of the position uncertainty. On the other hand, we concurrently work out a viable physical definition of the momentum operator and its standard deviation in the non-relativistic limit of the 3+1 formalism. Finally, we evaluate the uncertainty relation which to second order depends on the Ricci scalar of the effective 3-metric and the corresponding covariant derivative of the shift vector. For the sake of illustration, we apply our general result to a number of examples arising in the context of both general relativity and extended theories of gravity.
[Field notebook XVIII]
Creators: name: Albin, Jeanne
name: George, John
name: George, Mary
name: Harry, Noel George
name: Paul, Tommy
name: Wilson, Ambrose
name: Davis, John H.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: coo

description: 1 PDF file. Researcher indicates overall page range as 984-1022. Initials "J.D." stand for the researcher.
Multipronopea Enghoff 2022, gen. nov.
Creators: name: Enghoff, Henrik
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Spirostreptida
Odontopygidae
Multipronopea

description: Genus Multipronopea gen. nov.
urn:lsid:zoobank.org:act: C7AAFDC4-1858-413C-9482-157FCF84E20C
Type species
Multipronopea agneteae gen. et sp. nov.
Other included species
None.
Diagnosis
Differs from other genera of Prionopetalini by the combination of uniquely shaped limbus lobes (resembling the prow of a boat with multiple bowsprits) and an extremely elongated, slender and unilateraly serrate distal telomeral process.
Etymology
The genus name (gender feminine) is an anagram of Prionopetalum, referring to the similarities with this genus.
Remarks
In the key to genera of “ Odontopyginae ” of Kraus (1966), Multipronopea agneteae gen. et sp. nov. runs to couplet 31 where it fits neither alternative (Haplothysanus Attems, 1909, vs Haplothysaria Kraus, 1960).
Whereas the limbus of Multipronopea agneteae gen. et sp. nov. seems to be unique, the new genus shares gonopodal peculiarities with some other genera. Thus, the extremely slender, elongated telomere reminds of Allantogonus Attems, 1912, in which, however, the telomere is completely smooth, lacking the serrations in Multipronopea gen. nov.
The long, serrated distal telomeral process (tp) reminds of Prionopetalum Attems, 1909, and Yia Enghoff, 2016, but Multipronopea gen. nov. differs from both genera in several aspects, see Table 3.
description: Published as part of Enghoff, Henrik, 2022, Mountains of millipedes. The family Odontopygidae in the Eastern Arc Mountains of Tanzania (Diplopoda, Spirostreptida), pp. 1-136 in European Journal of Taxonomy 803 on pages 67-68, DOI: 10.5852/ejt.2022.803.1691, http://zenodo.org/record/6359066
Small Is Not Always Beautiful
Creators: name: Marciniak, Pawel
name: Liogkas, Nikitas
name: Legout, Arnaud
name: Kohler, Eddie
Publisher: name: arXiv
Year: 2008
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Peer-to-peer content distribution systems have been enjoying great popularity, and are now gaining momentum as a means of disseminating video streams over the Internet. In many of these protocols, including the popular BitTorrent, content is split into mostly fixed-size pieces, allowing a client to download data from many peers simultaneously. This makes piece size potentially critical for performance. However, previous research efforts have largely overlooked this parameter, opting to focus on others instead. This paper presents the results of real experiments with varying piece sizes on a controlled BitTorrent testbed. We demonstrate that this parameter is indeed critical, as it determines the degree of parallelism in the system, and we investigate optimal piece sizes for distributing small and large content. We also pinpoint a related design trade-off, and explain how BitTorrent's choice of dividing pieces into subpieces attempts to address it.