cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evaluation of some properties of polyetheretherketone composites used for biomedical applications
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 100708 Nanomaterials
subject: FOS: Nanotechnology
subject: 110501 Dental Materials and Equipment
subject: FOS: Clinical medicine
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: Polyetheretherketone is considered to be a prime candidate with the potential to replace biomedical metallic materials as an orthopedic and dental implant on account of its elastic modulus similar to that of human cortical bone. This study presents the effect of polyetheretherketone specimens incorporated with different nano titanium dioxide and nanohydroxyapatite loading up to (1.5 wt%) have been prepared through a series of processing stages involving melt compounding, granulating and hot pressing. Following analysis of mechanical and chemical interactions by flexural, surface roughness and fourier transform infrared spectroscopy respectively. The results showed that the nano titanium dioxide and nano hydroxyapatite particles were uniformly disperse into polyetheretherketone, so the flexuralmodulus, flexural strength and surface roughness of polyetheretherketone biocomposites obviously increased with the addition of nano powder. On the other hand, break strain decreased with the rise of the total nano titanium dioxide and nano hydroxyapatite content. Furthermore, the best properties obtained when reinforced with nano hydroxyapatite
Gravitational wave snapshots of generic extreme mass ratio inspirals
Creators: name: Drasco, Steve
name: Hughes, Scott A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using black hole perturbation theory, we calculate the gravitational waves produced by test particles moving on bound geodesic orbits about rotating black holes. The orbits we consider are generic - simultaneously eccentric and inclined. The waves can be described as having radial, polar, and azimuthal "voices", each of which can be made to dominate by varying eccentricity and inclination. Although each voice is generally apparent in the waveform, the radial voice is prone to overpowering the others. We also compute the radiative fluxes of energy and axial angular momentum at infinity and through the event horizon. These fluxes, coupled to a prescription for the radiative evolution of the Carter constant, will be used in future work to adiabatically evolve through a sequence of generic orbits. This will enable the calculation of inspiral waveforms that, while lacking certain important features, will approximate those expected from astrophysical extreme mass ratio captures sufficiently well to aid development of measurement algorithms on a relatively short timescale.
description: Minor changes in response to comments from readers, referees, and editors. Final version, as it will appear in Physical Review D. Raw data and a small program which will convert the data into waveforms lasting for arbitrary lengths of time can be found at http://gmunu.mit.edu/sdrasco/snapshots
Superconducting quantum many-body circuits for quantum simulation and computing
Creators: name: Wilkinson, Samuel A.
name: Hartmann, Michael J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum simulators are attractive as a means to study many-body quantum systems that are not amenable to classical numerical treatment. A versatile framework for quantum simulation is offered by superconducting circuits. In this perspective, we discuss how superconducting circuits allow the engineering of a wide variety of interactions, which in turn allows the simulation of a wide variety of model Hamiltonians. In particular we focus on strong photon-photon interactions mediated by nonlinear elements. This includes on-site, nearest-neighbour and four-body interactions in lattice models, allowing the implementation of extended Bose-Hubbard models and the toric code. We discuss not only the present state in analogue quantum simulation, but also future perspectives of superconducting quantum simulation that open up when concatenating quantum gates in emerging quantum computing platforms.
description: 8 pages, 4 figures, invited APL Perspectives paper
Additional file 1 of PALLiON – PALLiative care Integrated in ONcology: study protocol for a Norwegian national cluster-randomized control trial with a complex intervention of early integration of palliative care
Creators: name: Hjermstad, Marianne Jensen
name: Aass, Nina
name: Sigve Andersen
name: Brunelli, Cinzia
name: Dajani, Olav
name: Herish Garresori
name: Hamre, Hanne
name: Haukland, Ellinor C.
name: Holmberg, Mats
name: Jordal, Frode
name: Krogstad, Hilde
name: Lundeby, Tonje
name: Løhre, Erik Torbjørn
name: Mjåland, Svein
name: Nordbø, Arve
name: Paulsen, Ørnulf
name: Staff, Erik Schistad
name: Wester, Torunn
name: Kaasa, Stein
name: Loge, Jon Håvard
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 1. SPIRIT checklist.
The Cuntz-Toeplitz algebras have nuclear dimension one
Creators: name: Easo, Philip
name: Garijo, Esperanza
name: Kaubrys, Sarunas
name: Nkansah, David
name: Vrabec, Martin
name: Watt, David
name: Wilson, Cameron
name: Bönicke, Christian
name: Evington, Samuel
name: Forough, Marzieh
name: Pacheco, Sergio Girón
name: Seaton, Nicholas
name: White, Stuart
name: Whittaker, Michael F.
name: Zacharias, Joachim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L05 (Primary), 46L85

description: We prove that unital extensions of Kirchberg algebras by separable stable AF algebras have nuclear dimension one. The title follows.
description: Minor changes. Accepted Version. J. Funct. Anal., to appear
Proto-clusters and the clustering of distant galaxies and radio sources
Creators: name: Rottgering, Huub
name: Daddi, Emanuele
name: Overzier, Roderik
name: Wilman, Richard
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The clustering properties of objects in 3 different radio surveys (NVSS, FIRST and BOOTES-WSRT) and 2 near-infrared surveys (the ``Daddi field'' and the FIRES survey) are investigated and compared with studies of various samples of galaxies, AGN and clusters. At z ~ 1, it seems that the 2dF optical quasars have a correlation length a factor of about 2 less than powerful radio galaxies at similar redshifts. This indicates that these two classes of object can not be ``unified'' by postulating that their main difference is due to their evolution being at a different stage. It seems much more likely that these QSOs are predominantly located in field galaxies, while the powerful radio sources are located preferentially in early types. Furthermore, it appears that both the extremely red objects (EROs) from the IR surveys and the more luminous radio sources are similarly clustered and as such are the most clustered objects known in the z>1 Universe. Even at z ~3 the red J-K galaxies from the FIRES survey are similarly strongly clustered, at a level of about 3 times higher than Lyman break galaxies. These clustering properties are consistent with EROs and radio galaxies being similar objects at different stages of their evolution. Locally, the most clustered population of objects are clusters of galaxies. Since the progenitors of these objects -- proto-clusters -- will therefore also be highly clustered, a good way to locate proto-clusters is to target fields with very powerful and potentially highly clustered distant z>2 radio sources. The techniques that are currently being used for locating and studying these proto-clusters are briefly discussed.
description: 10 Pages, including 2 PostScript figures. To appear in the proceedings of the conference "Radio Galaxies: Past, present and future", Leiden, 11-15 Nov 2002
Two-step MEMS microfabrication via 3D direct laser lithography
Creators: name: Tricinci, Omar
name: Carlotti, Marco
name: Desii, Andrea
name: Meder, Fabian
name: Mattoli, Virgilio
Publisher: name: Zenodo
Year: 2021
Subjects: Direct laser lithography
MEMS
Transductors
Multicomponent systems
Microfabrication
Accelerometer

description: "Two-step MEMS microfabrication via 3D direct laser lithography", Presented by Virgilio Mattoli at Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIV; 116960J (2021) (Event: SPIE OPTO, 2021, Online Only) DOI: 10.1117/12.2579213 ABSTRACT: Micro/nano electro-mechanical systems (MEMS/NEMS) are constantly attracting an increasing attention for their relevant technological applications in fields ranging from biology, medicine, ecology, energy to industry. Most of the performances of micro-nanostructured devices rely on both the design and the intrinsic properties of the constituent materials that are processed at such dimensional scale. For this reason, spatial precision, resolution and reproducibility are crucial factors in the micro-fabrication procedure. 3D direct laser lithography (DLL), based on multiphoton absorption, allows to realize outstanding three-dimensional structures with nanoscale features. This technique has recently emerged as a powerful tool for fabricating 3D micro-patterned surfaces for optics, photonics, as well as for bioinspired cell culture scaffold. We propose a method for a two-step fabrication of micro/nanostructured multicomponent systems to be employed as transductors, by means of the integration of 3D DLL and shadowing effects in metal deposition. A z-axis accelerometer is the proof-of-concept for the validation of the proposed transductor. The former is composed of a cantilever patterned with conductive paths which act as a strain gauge. Mechanical stimulation deforms the cantilever and, accordingly, varies its conductive properties. The fabrication of the conductive components is performed using the vacuum evaporation of gold, a traditional microfabrication technique, and exploiting the shadowing effect due to peculiar microstructures on the cantilever
description: The authors acknowledge funding from the European Horizon 2020 Research and Innovation Programme under Grant Agreement No 899349 (5D NanoPrinting).
Spatially resolved atomic-scale friction: Theory and Simulation
Creators: name: Lee, Miru
name: Vink, Richard L. C.
name: Krüger, Matthias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze the friction force exerted on a small probe particle sliding over an atomic-scale surface by means of a Green-Kubo relation and classical Molecular Dynamics simulations. We find that, on the atomic scale, the friction tensor can drastically vary as a function of position and sliding direction. The Green-Kubo relation yields this positional and directional dependence from equilibrium simulations of the time dependent covariance of force acting on the probe. We find, unexpectedly, that the positional and directional dependence of energy dissipation is related to the (much simpler) static force covariance, especially in the limit where the probe only mildly perturbs the surface particles. In contrast, the (free) energy landscape experienced by the probe is in general not a good indicator of local dissipation. We also discuss optimization strategies making use of the locally and directionally resolved friction tensor. This enables us to find optimal sliding paths and velocity protocols, e.g., minimizing energy dissipation, between two points on the surface in a given time.
description: 10 pages, 12 figures
Astroparticle Theory: Some New Insights into High Energy Cosmic Rays
Creators: name: Roulet, Esteban
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Some new developments obtained in the last few years concerning the propagation of high energy cosmic rays are discussed. In particular, it is shown how the inclusion of drift effects in the transport diffusion equations leads naturally to an explanation for the knee, for the second knee and for the observed behavior of the composition and anisotropies between the knee and the ankle. It is shown that the trend towards a heavier composition above the knee has significant impact on the predicted neutrino fluxes above $10^{14}$ eV. The effects of magnetic lensing on the cosmic rays with energies above the ankle are also discussed, analyzing the main features of the different regimes that appear between the diffusive behavior that takes place at lower energies and the regime of small deflections present at the highest ones.
description: 10 pp. Plenary talk at the International Lepton-Photon Conference, Fermilab, August 11-16 2003
Exclusive production of two and four pions in proton-proton scattering
Creators: name: Lebiedowicz, P.
name: Nachtmann, O.
name: Szczurek, A.
name: Lebiedowicz, P.
name: Nachtmann, O.
name: Szczurek, A.
Publisher: name: Unknown
Year: 2017
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We consider exclusive pp → ppπ+π − and pp → ppπ+π −π +π − reactions at high energies. The calculation is based on a tensor pomeron model and the amplitudes for the processes are formulated in an effective field-theoretic approach. In the case of pp → ppπ+π − process we consider both diffractive and photoproduction mechanisms and we include the non-resonant π +π − continuum and the resonance f0(500), f0(980), f2(1270), ρ(770) contributions. We discuss how two pomerons couple to tensor meson f2(1270) and the interference effects of resonance and dipion continuum. We find that the relative contribution of resonances ρ(770), f2(1270) and dipion continuum strongly depends on the cut on proton transverse momenta. In the case of exclusive central 4π production we include the contribution via the intermediate σσ and ρρ states. For both processes the theoretical results have been compared with the experimental data and predictions for planned or being carried out experiments (e.g. STAR, ATLAS-ALFA) are presented.
High energy effects in multi-jet production at LHC
Creators: name: Caporale, F.
name: Celiberto, F.G.
name: Chachamis, G.
name: Gordo Gómez, D.
name: Murdaca, B.
name: Sabio Vera, A.
name: Caporale, F.
name: Celiberto, F.G.
name: Chachamis, G.
name: Gordo Gómez, D.
name: Murdaca, B.
name: Sabio Vera, A.
Publisher: name: Unknown
Year: 2017
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We study differential cross sections for the production of three and four jets in multi-Regge kinematics, the main interest lying on azimuthal angle dependences. The theoretical setup is the jet production from a single BFKL ladder with a convolution of two/three BFKL Green functions, where two forward/backward jets are always tagged in the final state. Furthermore, we require the tagging of one/two further jets in more central regions of the detectors with a relative separation in rapidity. We found, as result, that the dependence on transverse momenta and rapidities of the central jets can be considered as a distinct signal of the onset of BFKL dynamics.
Additional file 1 of Public and health professional epidemic risk perceptions in countries that are highly vulnerable to epidemics: a systematic review
Creators: name: Abdelmagid, Nada
name: Checchi, Francesco
name: Roberts, Bayard
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Search terms, and search strategy and results by database.
Double-parton scattering effects in double charm production within gluon fragmentation scenario
Creators: name: Maciuła, Rafał
name: Szczurek, Antoni
name: Maciuła, Rafał
name: Szczurek, Antoni
Publisher: name: Unknown
Year: 2017
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We discuss charm D 0D 0 meson-meson pair production in the forward rapidity region related to the LHCb experimental studies at √ s = 7 TeV. We consider double-parton scattering mechanisms of double cc¯ production and subsequent standard cc → D 0D 0 scale-independent hadronization as well as new double g and mixed gcc¯ production mechanisms with gg → D 0D 0 and gc → D 0D 0 scale-dependent hadronization. The new scenario with gluon fragmentation components results also in a new single-parton scattering mechanism of gg production which is also taken here into account. Results of the numerical calculations are compared with the LHCb data for several correlation observables. The new mechanisms lead to a larger cross sections and to slightly different shapes of the calculated correlation observables.
Mutual assistance between the Schwinger mechanism and the dynamical Casimir effect
Creators: name: Taya, Hidetoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: Plasma Physics (physics.plasm-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study massive charged particle production from the vacuum confined between two vibrating plates in the presence of a strong electric field. We analytically derive a formula for the production number based on the perturbation theory in the Furry picture, and show that the Schwinger mechanism by the strong electric field and the dynamical Casimir effect by the vibration assist with each other to dramatically enhance the production number by orders of the magnitude.
description: 16 pages, 5 figures; v2: typos corrected, references added, version to be published in PRR
The Crystal Field Potential of PrOs4Sb12: Consequences for Superconductivity
Creators: name: Goremychkin, E. A.
name: Osborn, R.
name: Bauer, E. D.
name: Maple, M. B.
name: Frederick, N. A.
name: Yuhasz, W. M.
name: Woodward, F. M.
name: Lynn, J. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The results of inelastic neutron scattering provide a solution for the crystal field level scheme in PrOs4Sb12 in which the ground state in the cubic crystal field potential of Th symmetry is a Gamma_1 singlet. The conduction electron mass enhancement is consistent with inelastic exchange scattering, and we propose that inelastic quadrupolar, or aspherical Coulomb, scattering is responsible for enhancing the superconducting transition temperature. PrOs4Sb12 appears to be the first compound in which aspherical Coulomb scattering is strong enough to overcome magnetic pair-breaking and increase Tc.
description: 4 pages, 2 figures
Additional file 4 of Air ambulance outcome measures using Institutes of Medicine and Donabedian quality frameworks: protocol for a systematic scoping review
Creators: name: Edwards, Kristin H.
name: FitzGerald, Gerard
name: Franklin, Richard C.
name: Edwards, Mark Terrell
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 4. Risk of bias in systematic review using ROBIS sample.
Additional file 2 of Public and health professional epidemic risk perceptions in countries that are highly vulnerable to epidemics: a systematic review
Creators: name: Abdelmagid, Nada
name: Checchi, Francesco
name: Roberts, Bayard
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. Quality appraisal of eligible studies (n = 56).
Optical absorption spectra in SrCu_2O_3 two-leg spin ladder
Creators: name: Haga, Nobuyasu
name: Suga, Sei-ichiro
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the phonon-assisted optical-absorption spectra in SrCu_2O_3 two-leg spin-ladder systems. The results for two models proposed for SrCu_2O_3 are compared. In the model including the effects of a cyclic four-spin interaction, the shoulder structure appears at 978 cm^{-1} and the peak appears at 1975 cm^{-1} in the spectrum for polarization of the electric field parallel to the legs. In the other model which describes a pure two-leg ladder, the peak appears around the lower edge of the spectrum at 1344 cm^{-1}. The feature can be effective in determining the proper model for SrCu_2O_3.
description: 5 pages, 5 figures, to appear in PRB vol. 67 (2003)
Perturbative renormalisation of the chiral Gross-Neveu model
Creators: name: Leder, Bjorn
name: Korzec, Tomasz
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the chiral Gross-Neveu model with Wilson fermions. In the framework of the Schroedinger functional we show that in general not only the bare mass has to be tuned to achieve chiral symmetry in the continuum, but also coupling constants multiplying chirally non-invariant four fermion terms. The strategy for fixing the parameters of the theory is explained in perturbation theory and the results of a first order calculation are presented. The results are shown to agree with the infinite flavour limit.
description: Talk presented at Lattice 2005 (Theoretical developments), 6 pages, 2 figures
Optical properties and Raman scattering of vanadium ladder compounds
Creators: name: Spitaler, J.
name: Sherman, E. Ya.
name: Ambrosch-Draxl, C.
name: Evertz, H. - G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate electronic and optical properties of the V-based ladder compounds NaV2O5, the iso-structural CaV2O5, as well as MgV2O5, which differs from NaV2O5 and CaV2O5 in the c axis stacking. We calculate ab initio the A_g phonon modes in these compounds as a basis for the investigation of the electron-phonon and spin-phonon coupling. The phonon modes together with the dielectric tensors as a function of the corresponding ion displacements are the starting point for the calculation of the A_g Raman scattering.
description: 4 pages, 5 figures, .bbl file with references included. Accepted for publication in Physica Scripta
QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum
Creators: name: Ji, Xiangdong
name: Ma, Jian-ping
name: Yuan, Feng
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate the factorization, we introduce the transverse-momentum dependent parton distributions and fragmentation functions with gauge links slightly off the light-cone, and with soft-gluon radiations subtracted. We verify the factorization to one-loop order in perturbative quantum chromodynamics and argue that it is valid to all orders in perturbation theory.
description: 28 pages, figures included
Additional file 3 of Air ambulance outcome measures using Institutes of Medicine and Donabedian quality frameworks: protocol for a systematic scoping review
Creators: name: Edwards, Kristin H.
name: FitzGerald, Gerard
name: Franklin, Richard C.
name: Edwards, Mark Terrell
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 3. Review of selected article format.
If $L(χ,1)=0$ then $ζ(1/2+it)\neq0$
Creators: name: Venturini, Sergio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 11M06

description: Let $L(s)=\sum_{n=1}^{+\infty}\dfrac{a(n)}{n^s}$ be a Dirichlet series were $a(n)$ is a bounded completely multiplicative function. We prove that if $L(s)$ extends to a holomorphic function on the open half space $\Re s >1-δ$, $δ>0$ and $L(1)=0$ then such a half space is a zero free region of the Riemann zeta function $ζ(s)$. Similar results is proven for completely multiplicative functions defined on the space of the ideals of the ring of the algebraic integers of a number field of finite degree.
description: 24 pages. Published in Riv. Mat. Univ. Parma with the title "Non vanishing of Dirichlet series of completely multiplicative functions"
Bose-Einstein correlations for Levy stable source distributions
Creators: name: Csorgo, T.
name: Hegyi, S.
name: Zajc, W. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The peak of the two-particle Bose-Einstein correlation functions has a very interesting structure. It is often believed to have a multivariate Gaussian form. We show here that for the class of stable distributions, characterized by the index of stability $0 < α\le 2$, the peak has a stretched exponential shape. The Gaussian form corresponds then to the special case of $α= 2$. We give examples for the Bose-Einstein correlation functions for univariate as well as multivariate stable distributions, and check the model against two-particle correlation data.
description: 30 pages, 1 figure, an important misprint in former eqs. (37-38) and other minor misprints are corrected, citations updated
Thesis Artifacts for: Scalability Benchmarking of Stream Processing Engines with Apache Beam
Creators: name: Bensien, Jan Robert
Publisher: name: Zenodo
Year: 2021
Subjects: Stream Processing
Scalability
Benchmark

description: Thesis Artifacts for: Scalability Benchmarking of Stream Processing Engines with Apache Beam A detailed description can be found in the README.md. The corressponding thesis can be found here. Abstract The rapid increase in data due to modern developments, such as Industry 4.0, Internet of Things, artificial intelligence or the analysis of user interaction on websites led to a plethora of new technologies dealing with the challenges associated with the four Vs of Big Data. One approach for dealing with these challenges, stream processing, gained special interest due to its ability to handle high loads while providing real-time results. Due to this, many different stream processing frameworks emerged, each with its own design decisions. In this thesis, we will benchmark the horizontal scalability of two stream processing frameworks. To achieve this, we will apply the benchmarking method Theodolite and benchmark four already identified use cases. We will focus on Apache Beam as a programming API using Apache Samza and Apache Flink as stream processing backends. Additionally, we will adjust the framework of Theodolite to support the execution of Beam pipelines using Apache Flink and Apache Samza as stream processing engines. Following, we will take the necessary steps to execute our use cases in a private cloud environment, orchestrated by Kubernetes. We found that using Flink as processing backend is advantageous in three use cases, while using Samza as processing backend results in better results for one use case.
title: Motivating continuing professional development : factors influencing university academic staff and the implications for management
Creators: name: King, Karen
Publisher: name: The Open University
Year: 2004

description: This is a study about a specific aspect of educational practice and the relationship between relevant theories and that practice. It focuses on educational management in higher education and, in particular, the management of continuing professional development (CPD) for academic staff. The research question that this study seeks to answer is ‘what factors are influencing university academic staff to engage with CPD?’ The study then goes on to determine the implications for managers of the research findings and makes recommendations to university managers that will enhance the motivation of staff to engage with CPD.

In pursuing this research, the study uses educational management concepts and models to explore how higher education institutions are managed, with particular reference to how the appraisal aspect of CPD is managed and how this might affect the motivation of academics to engage with CPD. It includes an examination of the external environment of higher education and attempts to explain where the pressures for change are coming from and how these pressures are influencing working practices in higher education institutions (HEIs). The concepts of CPD and motivation are analysed in this context, as well as the concept of the learning organisation and how this relates to CPD for higher education personnel. The management of CPD within HEIs is considered with particular reference to appraisal processes. In addressing these issues, qualitative data on the perceptions of CPD and how it is currently being managed have been gathered from academics and their line managers in three universities and analysed in relation to theoretical models of educational management.

Cultural tensions were found within universities in the areas of strategic implementation, performance management and ‘middle’ management development. These appear to derive primarily from two sources. The first is the conflict between senior management rationality and the collegial decision making approach favoured by academics. The second is related to academic autonomy and the issue of accommodating individual as well as institutional needs in development activities. The link connecting these two sources is the existence of conflict between individual and institutional needs exemplified by appraisal processes in HE. Suggestions for organisational development to reduce conflict and resistance to change are given. However, there are other environmental factors, which need to be addressed by the wider academic community that will influence any development. One is a curriculum development issue centred on the acceptability by academics of professional development as a core higher level educational aim, and another is the current narrow focus of the Institute of Teaching and Learning (ILT) as a professional body for academics.
Topological Objects in Holographic QCD
Creators: name: Suganuma, Hideo
name: Hori, Keiichiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study topological objects in holographic QCD based on the Sakai-Sugimoto model, which is constructed with $N_c$ D4 branes and $N_f$ D8/$\bar{\rm D8}$ branes in the superstring theory, and is infrared equivalent to 1+3 dimensional massless QCD. Using the gauge/gravity duality, holographic QCD is described as 1+4 dimensional U($N_f$) gauge theory in flavor space with a background gravity, and its instanton solutions correspond to baryons. First, using the Witten Ansatz, we reduce holographic QCD into a 1+2 dimensional Abelian Higgs theory in a curved space and consider its topological aspect. We numerically obtain the Abrikosov vortex solution and investigate single baryon properties. Second, we study a single meron and two merons in holographic QCD. The single meron carrying a half-integer baryon number is found to have a infinite energy also in holographic QCD. We propose a new-type baryon excitation of the two-merons oscillation in the extra-direction of holographic QCD.
description: 16 pages, 6 figures
Beyond the Landau Criterion for Superfluidity
Creators: name: Ianeselli, Sara
name: Menotti, Chiara
name: Smerzi, Augusto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: According to the Landau criterion for superfluidity, a Bose-Einstein condensate flowing with a group velocity smaller than the sound velocity is energetically stable to the presence of perturbing potentials. We found that this is strictly correct only for vanishingly small perturbations. The superfluid critical velocity strongly depends on the strength and shape of the defect. We quantitatively study, both numerically and with an approximate analytical model, the dynamical response of a one-dimensional condensate flowing against an istantaneously raised spatially periodic defect. We found that the critical velocity $v_c$ decreases by incresing the strength of the defect $V_0$, up to to a critical value of the defect intensity where the critical velocity vanishes.
Four-jet production in the kt-factorisation
Creators: name: Szczurek, Antoni
name: Maciuła, Rafał
name: Szczurek, Antoni
name: Maciuła, Rafał
Publisher: name: Unknown
Year: 2017
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We discuss the single-parton and double-parton scattering (SPS or DPS) effects in four-jet production at the LHC. The calculations of both singleparton and double-parton scattering components are done in the high-energy (or kT )-factorization approach. Here we follow our recent developments of relevant methods and tools. The calculations are performed for kinematical situations relevant for two experimental measurements (ATLAS and CMS) at the LHC. We compare our results to those reported by the ATLAS and CMS collaborations for different sets of kinematical cuts. A special attention is given to the optimization of kinematical conditions in order to enhance the relative contribution of DPS in four-jet sample. Several differential distributions are calculated and carefully discussed in the context of recent and future searches for DPS effects at the LHC. The dependences of the relative DPS amount is studied as a function of rapidity of jets, rapidity distance, and various azimuthal correlations between jets. The regions with an enhanced DPS contribution are identified.
Electroweak Baryogenesis and Dark Matter in the nMSSM
Creators: name: Menon, A.
name: Morrissey, D. E.
name: Wagner, C. E. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the possibility of electroweak baryogenesis and dark matter in the nMSSM, a minimal extension of the MSSM with a singlet field. This extension avoids the usual domain wall problem of the NMSSM, and also appears as the low energy theory in models of dynamical electroweak symmetry breaking with a so-called fat-Higgs boson. We demonstrate that a strong, first order electroweak phase transition, necessary for electroweak baryogenesis, may arise in regions of parameter space where the lightest neutralino provides an acceptable dark matter candidate. We investigate the parameter space in which these two properties are fulfilled and discuss the resulting phenomenology. In particular, we show that there are always two light CP-even and one light CP-odd Higgs bosons with masses smaller than about 250 GeV. Moreover, in order to obtain a realistic relic density, the lightest neutralino mass tends to be smaller than $M_Z/2$, in which case the lightest Higgs boson decays predominantly into neutralinos.
description: 32 pages, 9 postscript figures, LateX
Additional file 1 of Structural and functional changes in the fungal community of plant detritus in an invaded Atlantic Forest
Creators: name: Bail, Jaqueline
name: Gomez, Jose Alejandro Morales
name: de Oliveira Vaz, Giselle Cristina
name: de Castro, Wagner Antonio Chiba
name: Bonugli-Santos, Rafaella Costa
Publisher: name: figshare
Year: 2022
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 1: Supplementary Figure 1. Rarefaction curve from litter in the invaded and non-invaded areas of the INP after 100 days of incubation in a litter bag system. Supplementary Figure 2. Venn’s diagrams from litter in the invaded and non-invaded areas of the INP after 100 days of incubation in a litter bag system. Illustrates both the magnitude of the mycrobiota identified and those taxonomical levels that are unique to one sampling site and those that are shared. A) Phylum; B) Class; C) Order; D) Family; E) Genus; F) Species. Supplementary Table 1. DNA sequencing quality processing from from litter in invaded and non-invaded areas of the INP after 100 days of incubation in a litter bag system.
Drell-Yan production at forward rapidities: a hybrid factorization approach
Creators: name: Schäfer, Wolfgang
name: Szczurek, Antoni
name: Schäfer, Wolfgang
name: Szczurek, Antoni
Publisher: name: Unknown
Year: 2017
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We discuss the Drell-Yan production of dileptons at high energies in the forward rapidity region of proton-proton collisions in a hybrid high-energy approach. This approach uses unintegrated gluon distributions in one proton and collinear quark/antiquark distributions in the second proton. We compute various distributions for the case of low-mass dilepton production and compare to the LHCb and ATLAS experimental data on dilepton mass distributions. In distinction to dipole approaches, we include four DrellYan structure functions as well as cuts at the level of lepton kinematics. The impact of the interference structure functions is rather small for typical experimental cuts. We find that both side contributions (gq/q¯ and q/qg¯ ) have to be included even for the LHCb rapidity coverage which is in contradiction with what is usually done in the dipole approach. We present results for different unintegrated gluon distributions from the literature. Some of them include saturation effects, but we see no clear hints of saturation even at small Mll.
Irrigation monitoring and evapotranspiration modeling at the UBC Farm determining crop water requirements of a teggia bean (Phaseolus vulgaris)
Creators: name: Moore, Brenda
Publisher: name: The University of British Columbia
Year: 2012

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Breaking of general rotational symmetries by multi-dimensional classical ratchets
Creators: name: Ghosh, A. W.
name: Khare, S. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate that a particle driven by a set of spatially uncorrelated, independent colored noise forces in a bounded, multidimensional potential exhibits rotations that are independent of the initial conditions. We calculate the particle currents in terms of the noise statistics and the potential asymmetries by deriving an n-dimensional Fokker-Planck equation in the small correlation time limit. We analyze a variety of flow patterns for various potential structures, generating various combinations of laminar and rotational flows.
description: Accepted, Physical Review E
Asymmetric Price Volatility Transmission between U.S. Biofuel, Corn, and Oil Markets
Creators: name: Saghaian, Sayed
name: Nemati, Mehdi
name: Walters, Cory
name: Chen, Bo
name: Saghaian, Sayed
name: Nemati, Mehdi
name: Walters, Cory
name: Chen, Bo
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: asymmetric BEKK-MGARCH modeling
subject: biofuel
subject: corn prices
subject: crude oil prices
subject: ethanol prices

description: Linkages between agricultural commodity and energy prices have become more complex with increased ethanol production. The concern is whether the new corn–ethanol links lead to volatilityspillover transmission between food and energy prices. We investigate asymmetric volatility spillovers between oil, corn, and ethanol prices using a BEKK-multivariate-GARCH approach. Additionally, we use daily, weekly, and monthly futures prices to examine whether the use of different-frequency data leads to inconsistent results. The results support the existence of asymmetric volatility transmission between corn and ethanol prices. Furthermore, the volatilityspillover effects are different for the different-frequency prices, and positive and negative price changes generate inconsistent results.
Does Crop Insurance Influence Commercial Crop Farm Decisions to Expand? An Analysis Using Panel Data from the Census of Agriculture
Creators: name: Burns, Christopher B.
name: Prager, Daniel L.
name: Burns, Christopher B.
name: Prager, Daniel L.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: acreage response
subject: farm exits
subject: government payments

description: The Agricultural Act of 2014 increased the role of risk-mitigating policies in U.S. agricultural policy and focused attention on how crop insurance affects farm production decisions. Using detailed farm-level data from the Census of Agriculture and supplemental county-level data, this paper seeks to understand whether purchasing crop insurance influences commercial crop farms’ decisions to expand. After instrumenting for the endogenous decision to purchase crop insurance, we find that paying higher net premiums had no statistically significant effect on crop farm expansion from 2007 to 2012. We also find that farms expanded more when they were located in counties with more acres enrolled in the Conservation Reserve Program.
Additional file 1 of An exploratory assessment of the legislative framework for combating counterfeit medicines in South Africa
Creators: name: Moshoeshoe, R. J.
name: Enslin, G. M.
name: Katerere, D. R.
Publisher: name: figshare
Year: 2022
Subjects: subject: Law
subject: FOS: Law

description: Additional file 1. (addendum A): Informed consent.
Application of Multiple Imputation in Dealing with Missing Data in Agricultural Surveys: The Case of BMP Adoption
Creators: name: Zhong, Hua
name: Hu, Wuyang
name: Penn, Jerrod M.
name: Zhong, Hua
name: Hu, Wuyang
name: Penn, Jerrod M.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: best management practices
subject: multivariate imputation by chained equation
subject: nonpoint source

description: Missing-data problems are common in farmer surveys but are often ignored in the literature. Conventional methods to address missing data, such as deletion and mean replacement, assume that data are missing completely at random, which rarely holds. This study compares these approaches to the multiple imputation method, which produces different parameter estimates. The mean replacement method increases the central tendency of data, leading to more significant but smaller coefficients than the other methods. We recommend using both the deletion and multiple imputation methods to deal with missing data; results generated by the mean replacement method may not be as reliable.
Fire: A Phase Transition in the Duality of Mass and Energy through CODES
Creators: name: Bostick, Devin
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Theoretical physics
subject: Fire
subject: Quantum physics
subject: Wavelet Analysis

description: 1. Expanded CODES Framework (Empirical Studies + Theory)

🔹 CODES: The Chirality of Dynamic Emergent Systems (Main Paper)

2. Introduction & High-Level Overview

🔹 CODES: High-Level Introduction

3. Structured Resonance & Emergent Intelligence

🔹 Structured Resonance and the Nature of Intelligence

 

Abstract

Fire is a ubiquitous process in nature, traditionally described as a chemical reaction that releases stored energy through combustion. This paper offers a novel interpretation of fire through the Chirality of Dynamic Emergent Systems (CODES) framework, positioning it as a phase transition between mass (M) and energy (E). We propose that fire represents a dynamic interaction of structured resonance and chaotic dissipation, illustrating how mass transforms into energy while maintaining temporary coherence. This perspective reveals fire as a self-organizing boundary state, offering broader insights into emergent processes in physics, biology, and ecosystems.
Tunable correlation-driven symmetry breaking in twisted double bilayer graphene
Creators: name: He, Minhao
name: Li, Yuhao
name: Cai, Jiaqi
name: Liu, Yang
name: Watanabe, K.
name: Taniguchi, T.
name: Xu, Xiaodong
name: Yankowitz, Matthew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A variety of correlated phases have recently emerged in select twisted van der Waals (vdW) heterostructures owing to their flat electronic dispersions. In particular, heterostructures of twisted double bilayer graphene (tDBG) manifest electric field-tunable correlated insulating (CI) states at all quarter fillings of the conduction band, accompanied by nearby states featuring signatures suggestive of superconductivity. Here, we report electrical transport measurements of tDBG in which we elucidate the fundamental role of spontaneous symmetry breaking within its correlated phase diagram. We observe abrupt resistivity drops upon lowering the temperature in the correlated metallic phases neighboring the CI states, along with associated nonlinear $I$-$V$ characteristics. Despite qualitative similarities to superconductivity, concomitant reversals in the sign of the Hall coefficient instead point to spontaneous symmetry breaking as the origin of the abrupt resistivity drops, while Joule heating appears to underlie the nonlinear transport. Our results suggest that similar mechanisms are likely relevant across a broader class of semiconducting flat band vdW heterostructures.
description: 15 Pages, 15 Figures
Optimal Beef Cow Weights in the U.S. Southern Plains
Creators: name: Bir, Courtney
name: DeVuyst, Eric A.
name: Rolf, Megan
name: Lalman, David
name: Bir, Courtney
name: DeVuyst, Eric A.
name: Rolf, Megan
name: Lalman, David
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Livestock Production/Industries
subject: calf weaning weight
subject: frame size
subject: mature cow weight
subject: optimal cow weight

description: This research investigates net present value–maximizing beef cow weights for U.S. Southern Plains cow–calf operations. The relationship between cow weight and calf weaning weight was estimated and weaning weights were simulated for a 15-year time period. Annual returns were computed using cow–calf revenues and production costs for cows with mature weight between 950 and 1,800 pounds. A grid search showed that optimal cow size was 950 pounds across scenarios. Selection for growth may improve feedlot profitability but has deleterious effects on cow–calf producers. Development of smaller-framed maternal lines may improve sector profits.