cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Studies of the Lennard-Jones fluid in 2, 3, and 4 dimensions highlight the need for a liquid-state 1/d expansion
Creators: name: Costigliola, Lorenzo
name: Schrøder, Thomas B.
name: Dyre, Jeppe C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The recent theoretical prediction by Maimbourg and Kurchan [arXiv:1603.05023] that for regular pair-potential systems the virial potential-energy correlation coefficient increases towards unity as the dimension $d$ goes to infinity is investigated for the standard 12-6 Lennard-Jones fluid. This is done by computer simulations for $d=2,3,4$ going from the critical point along the critical isotherm/isochore to higher density/temperature. In all cases the virial potential-energy correlation coefficient increases significantly. For a given density and temperature relative to the critical point, with increasing number of dimension the Lennard-Jones system conforms better to the hidden-scale-invariance property characterized by high virial potential-energy correlations (a property that leads to the existence of isomorphs in the thermodynamic phase diagram, implying that it becomes effectively one-dimensional in regard to structure and dynamics). The present paper also gives the first numerical demonstration of isomorph invariance of structure and dynamics in four dimensions. Our findings emphasize the need for a universally applicable $1/d$ expansion in liquid-state theory; we conjecture that the systems known to obey hidden scale invariance in three dimensions are those for which the yet-to-be-developed $1/d$ expansion converges rapidly.
Light mesons in QCD and unquenching effects from the 3PI effective action
Creators: name: Williams, Richard
name: Fischer, Christian S.
name: Heupel, Walter
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the impact of unquenching effects on QCD Green's functions, in the form of quark-loop contributions to both the gluon propagator and three-gluon vertex, in a three-loop inspired truncation of the three-particle irreducible (3PI) effective action. The fully coupled system of Dyson-Schwinger equations for the quark-gluon-, ghost-gluon- and three-gluon vertices, together with the quark propagator, are solved self-consistently; our only input are the ghost and gluon propagators themselves that are constrained by calculations within Lattice QCD. We find that the two different unquenching effects have roughly equal, but opposite, impact on the quark-gluon vertex and quark propagator, with an overall negative impact on the latter. By taking further derivatives of the 3PI effective action, we construct the corresponding quark-antiquark kernel of the Bethe-Salpeter equation for mesons. The leading component is gluon exchange between two fully-dressed quark-gluon vertices, thus introducing for the first time an obvious scalar-scalar component to the binding. We gain access to time-like properties of bound-states by analytically continuing the coupled system of Dyson--Schwinger equations to the complex plane. We observe that the vector axial-vector splitting is in accord with experiment and that the lightest quark-antiquark scalar meson is above 1 GeV in mass.
description: 13 pages, 14 figures, 1 table, v2: minor changes, version accepted by PRD
Dissipation and decoherence effects on a moving particle in front of a dielectric plate
Creators: name: Farias, M. Belén
name: Lombardo, Fernando C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: On this work, we consider a particle moving in front of a dielectric plate, and study two of the most relevant effects of the vacuum field fluctuations: the dissipation, and the decoherence of the particle's internal degrees of freedom. We consider the particle to follow a classical, macroscopically-fixed trajectory. To study the dissipative effects, we calculate the in-out effective action by functionally integrating over the vacuum field and the microscopic degrees of freedom of both the plate and the particle. This in-out effective action develops an imaginary part, hence a non-vanishing probability for the decay (because of friction) of the initial vacuum state. We analyze how the dissipation is affected by the relative velocity between the particle and the plate and the properties of the microscopic degrees of freedom. In order to study the effects of decoherence over the internal degrees of freedom of the particle, we calculate the CTP or Schwinger-Keldysh influence action, by functionally integrating over the vacuum field and the microscopic degrees of freedom of the plate. We estimate the decoherence time as the time needed by two different quantum configurations (of the internal degree of freedom of the particle) to be possible to differentiate from one another. We analyze the way in which the presence of the mirror affects the decoherence, and the possible ways to maximize or reduce its effects.
description: 16 pages, 3 figures, corrected some typos on Fig. 3
Rydberg molecule-induced remote spin-flips
Creators: name: Niederprüm, Thomas
name: Thomas, Oliver
name: Eichert, Tanita
name: Ott, Herwig
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have performed high resolution photoassociation spectroscopy of rubidium ultra long-range Rydberg molecules in the vicinity of the 25$P$ state. Due to the hyperfine interaction in the ground state perturber atom, the emerging mixed singlet-triplet potentials contain contributions from both hyperfine states. We show that this can be used to induce remote spin-flips in the perturber atom upon excitation of a Rydberg molecule. When furthermore the spin-orbit splitting of the Rydberg state is comparable to the hyperfine splitting in the ground state, the orbital angular momentum of the Rydberg electron is entangled with the nuclear spin of the perturber atom. Our results open new possibilities for the implementation of spin-dependent interactions for ultracold atoms in bulk systems and in optical lattices.
description: 6 pages, 3 figures
New Insights into Quantum Gravity from Gauge/gravity Duality
Creators: name: Engelhardt, Netta
name: Horowitz, Gary T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using gauge/gravity duality, we deduce several nontrivial consequences of quantum gravity from simple properties of the dual field theory. These include: (1) a version of cosmic censorship, (2) restrictions on evolution through black hole singularities, and (3) the exclusion of certain cosmological bounces. In the classical limit, the latter implies a new singularity theorem.
description: 7 pages, 3 figures. Awarded second prize in the 2016 Gravity Research Foundation Essay Contest; v2: comment added
Elasticity in Amorphous Solids: Nonlinear or Piece-Wise Linear?
Creators: name: Dubey, Awadhesh K.
name: Procaccia, Itamar
name: Shor, Carmel A. B. Z.
name: Singh, Murari
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Quasi-static strain-controlled measurements of stress vs strain curves in macroscopic amorphous solids result in a nonlinear looking curve that ends up either in mechanical collapse or in a steady-state with fluctuations around a mean stress that remains constant with increasing strain. It is therefore very tempting to fit a nonlinear expansion of the stress in powers of the strain. We argue here that at low temperatures the meaning of such an expansion needs to be reconsidered. We point out the enormous difference between quenched and annealed averages of the stress vs. strain curves, and propose that a useful description of the mechanical response is given by a stress (or strain) dependent shear modulus for which a theoretical evaluation exists. The elastic response is piece-wise linear rather than nonlinear.
description: 5 pages, 5 figures
Phase Mixing of Relativistically Intense Longitudinal Wave Packets in a Cold Plasma
Creators: name: Mukherjee, Arghya
name: Sengupta, Sudip
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The spatio-temporal evolution and breaking of relativistically intense wave packets in a cold homogeneous unmagnetized plasma has been studied analytically and numerically. A general expression for phase mixing time scale as a function of amplitude of the wave packet and width of the spectrum has been derived. Results have been compared with the existing formulae in literature. It is shown that phase mixing time scale crucially depends on the relative magnitude of the amplitude and dimensionless spectral width of the wave packet. Finally we have verified our results with respect to both the amplitude of the wave packet and width of the spectral using numerical simulations based on Dawson Sheet Model.
title: PerAWaT - GH Far Wake Modelling Report (WG3 WP4 D5)
Creators: name: Thomson, M.D.
name: Gill, L.
name: Collings, R.
Publisher: name: ETI
Year: 2011
Subjects: subject: Marine
subject: RENEWABLE ENERGY SOURCES (Ocean Energy)

description: The Performance Assessment of Wave and Tidal Array Systems (PerAWaT) project, launched in October 2009 with £8m of ETI investment.The project delivered validated, commercial software tools capable of significantly reducing the levels of uncertainty associated with predicting the energy yield of major wave and tidal stream energy arrays. It also produced information that will help reduce commercial risk of future large scale wave and tidal array developments.

This document outlines the issues associated with modelling the far wake region within an array of tidal turbines. A review of the existing literature is presented which provides an overview of both the applicable modelling options which characterise the wake region of interest.The GH far wake model is described and the modelling approach justified.The GH far wake model simplifies the fundamental Navier-Stokes equations to allow a computationally efficient method to evaluate far wake development. To account for any surrounding bounding effects a hybrid method is used.The model is initialised by the GH device scale models and then the solution propagates downstream.The key parameters which affect the model include:The ambient flow turbulence and the potential impact of bounding surfaces and/or other surrounding turbines. Wake merging models are used to combine multiple wakes. Flow diagrams of the GH far wake model algorithms are presented. Existing validation of the aspects of the modelling method are presented.

The theory and methodology of the GH far wake model have been detailed and an account of how the model will be incorporated in the TidalFarmer beta code is provided.The GH far wake model is an arrangement of several models which collectively provide an array far wake modelling method.The eddy-viscosity model is the core flow solver which predicts the recovery of a single wake based on the initial velocity deficit profile and the ambient flow turbulence intensity. A split modelling approach decouples the vertical and lateral boundary conditions allowing a fast computation of several 3-d wakes. By combining the split models a representative wake is evaluated.The model utilises an elliptical Gaussian profile to account for the interaction with the bounding free-surface and seabed.
Testing semi-local chiral two-nucleon interaction in selected electroweak processes
Creators: name: Skibinski, R.
name: Golak, J.
name: Topolnicki, K.
name: Witala, H.
name: Epelbaum, E.
name: Kamada, H.
name: Krebs, H.
name: Meissner, Ulf-G.
name: Nogga, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recently developed semi-local improved chiral nucleon-nucleon interaction is used for the first time to study several electromagnetic and weak processes at energies below the pion production threshold. Cross sections and selected polarization observables for deuteron photodisintegration, nucleon-deuteron radiative capture, three-body $^3$He photodisintegration as well as capture rates for decays of the muonic $^2$H and $^3$He atoms are calculated. The Lippmann-Schwinger and Faddeev equations in momentum space are solved to obtain nuclear states. The electromagnetic current operator is taken as a single nucleon current supplemented by many-body contributions induced via the Siegert theorem. For muon capture processes the nonrelativistic weak current together with the dominant relativistic corrections is used. Our results compare well with experimental data, demonstrating the same quality as is observed for the semi-phenomenological AV18 potential. Compared to the older version of the chiral potential with a nonlocal regularization, a much smaller cut-off dependence is found for the state-of-art chiral local interaction employed in this paper. Finally, estimates of errors due to the truncation of the chiral expansion are given.
description: 23 pages, 12 eps figures, improved version accepted to Phys. Rev. C. Note, the title of the manuscript is changed
Majorana Edge Modes with Gain and Loss
Creators: name: Yuce, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider a non-Hermitian generalization of the Kitaev model and study the existence of stable Majorana zero energy modes. We show that they exist in the limit of zero chemical potential even if balanced gain and loss are randomly distributed along the lattice. We show that Majorana zero modes also appear if the chemical potential is different from zero provided that not the full Hamiltonian but the non-Hermitian part of the Hamiltonian is PT symmetric.
description: To appear in Phys. Rev. A
Machine Learning and Artificial Intelligence in CNC Machine Tools, A Review
Creators: name: Soori, Mohsen
name: Arezoo, Behrooz
name: Dastres, Roza
Publisher: name: figshare
Year: 2023
Subjects: Machine tools
CAD/CAM systems
Precision engineering

description: Artificial Intelligence (AI) and Machine learning (ML) represents an important evolution in computer science and data processing systems which can be used in order to enhance almost every technology-enabled service, products, and industrial applications. A subfield of artificial intelligence and computer science named machine learning which focuses on using data and algorithms to simulate learning process of machines and enhance the accuracy of the systems. Machine learning systems can be applied to the cutting forces and cutting tool wear prediction in CNC machine tools in order to increase cutting tool life during machining operations. Optimized machining parameters of CNC machining operations can be obtained by using the advanced machine learning systems in order to increase efficiency during part manufacturing processes. Moreover, surface quality of machined components can be predicted and improved using advanced machine learning systems to improve the quality of machined parts. In order to analyze and minimize power usage during CNC machining operations, machine learning is applied to prediction techniques of energy consumption of CNC machine tools. In this paper, applications of machine learning and artificial intelligence systems in CNC machine tools is reviewed and future research works are also recommended to present an overview of current research on machine learning and artificial intelligence approaches in CNC machining processes. As a result, the research filed can be moved forward by reviewing and analysing recent achievements in published papers to offer innovative concepts and approaches in applications of artificial Intelligence and machine learning in CNC machine tools.
Lobachevsky geometry in TTW and PW systems
Creators: name: Hakobyan, Tigran
name: Nersessian, Armen
name: Shmavonyan, Hovhannes
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the classical properties of Tremblay-Turbiner-Winternitz and Post-Wintenitz systems and their relation with N-dimensional rational Calogero model with oscillator and Coulomb potentials, paying special attention to their hidden symmetries. Then we show that combining the radial coordinate and momentum in a single complex coordinate in proper way, we get an elegant description for the hidden and dynamical symmetries in these systems related with action-angle variables.
description: 9 pages, misprint corrected, reference added. To appear in the Proceedings of the IX Symposium on Quantum Theory and Symmetries (QTS-9), July 13-18, 2015, Yerevan
Die prophetischen Analogiehandlungen im Alten Testament (Heiko Wenzel
Creators: name: Ott, Katrin
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1823353479
description: Jahrbuch für evangelikale Theologie, V. 26 (2012): Jahrbuch für evangelikale Theologie, Band 26
The Gaia-ESO Survey: Sodium and aluminium abundances in giants and dwarfs - Implications for stellar and Galactic chemical evolution
Creators: name: Smiljanic, R.
name: Romano, D.
name: Bragaglia, A.
name: Donati, P.
name: Magrini, L.
name: Friel, E.
name: Jacobson, H.
name: Randich, S.
name: Ventura, P.
name: Lind, K.
name: Bergemann, M.
name: Nordlander, T.
name: Morel, T.
name: Pancino, E.
name: Tautvaisiene, G.
name: Adibekyan, V.
name: Tosi, M.
name: Vallenari, A.
name: Gilmore, G.
name: Bensby, T.
name: Francois, P.
name: Koposov, S.
name: Lanzafame, A. C.
name: Recio-Blanco, A.
name: Bayo, A.
name: Carraro, G.
name: Casey, A. R.
name: Costado, M. T.
name: Franciosini, E.
name: Heiter, U.
name: Hill, V.
name: Hourihane, A.
name: Jofre, P.
name: Lardo, C.
name: de Laverny, P.
name: Lewis, J.
name: Monaco, L.
name: Morbidelli, L.
name: Sacco, G. G.
name: Sbordone, L.
name: Sousa, S. G.
name: Worley, C. C.
name: Zaggia, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stellar evolution models predict that internal mixing should cause some sodium overabundance at the surface of red giants more massive than ~ 1.5--2.0 Msun. The surface aluminium abundance should not be affected. Nevertheless, observational results disagree about the presence and/or the degree of the Na and Al overabundances. In addition, Galactic chemical evolution models adopting different stellar yields lead to quite different predictions for the behavior of [Na/Fe] and [Al/Fe] versus [Fe/H]. Overall, the observed trends of these abundances with metallicity are not well reproduced. We readdress both issues, using new Na and Al abundances determined within the Gaia-ESO Survey, using two samples: i) more than 600 dwarfs of the solar neighborhood and of open clusters and ii) low- and intermediate-mass clump giants in six open clusters. Abundances of Na in giants with mass below ~2.0 Msun, and of Al in giants below ~3.0 Msun, seem to be unaffected by internal mixing processes. For more massive giants, the Na overabundance increases with stellar mass. This trend agrees well with predictions of stellar evolutionary models. Chemical evolution models that are able to fit well the observed [Na/Fe] vs. [Fe/H] trend in solar neighborhood dwarfs can not simultaneously explain the run of [Al/Fe] with [Fe/H], and viceversa. The comparison with stellar ages is hampered by severe uncertainties. Indeed, reliable age estimates are available for only a half of the stars of the sample. We conclude that Al is underproduced by the models, except for stellar ages younger than about 7 Gyr. In addition, some significant source of late Na production seems to be missing in the models. Either current Na and Al yields are affected by large uncertainties, and/or some important Galactic source(s) of these elements has not been taken into account up to now. [abridged]
description: 16 pages, 11 figures, A&A accepted, After language editing
The Theme of Hardening in the Book of Isaiah. An Analysis of Communicative Action (Richard Schultz)
Creators: name: Uhlig, Torsten
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1823353460
description: Jahrbuch für evangelikale Theologie, V. 26 (2012): Jahrbuch für evangelikale Theologie, Band 26
The AllWISE Motion Survey, Part 2
Creators: name: Kirkpatrick, J. Davy
name: Kellogg, Kendra
name: Schneider, Adam C.
name: Fajardo-Acosta, Sergio
name: Cushing, Michael C.
name: Greco, Jennifer
name: Mace, Gregory N.
name: Gelino, Christopher R.
name: Wright, Edward L.
name: Eisenhardt, Peter R. M.
name: Stern, Daniel
name: Faherty, Jacqueline K.
name: Sheppard, Scott S.
name: Lansbury, George B.
name: Logsdon, Sarah E.
name: Martin, Emily C.
name: McLean, Ian S.
name: Schurr, Steven D.
name: Cutri, Roc M.
name: Conrow, Tim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We use the AllWISE Data Release to continue our search for WISE-detected motions. In this paper, we publish another 27,846 motion objects, bringing the total number to 48,000 when objects found during our original AllWISE motion survey are included. We use this list, along with the lists of confirmed WISE-based motion objects from the recent papers by Luhman and by Schneider et al. and candidate motion objects from the recent paper by Gagne et al. to search for widely separated, common-proper-motion systems. We identify 1,039 such candidate systems. All 48,000 objects are further analyzed using color-color and color-mag plots to provide possible characterizations prior to spectroscopic follow-up. We present spectra of 172 of these, supplemented with new spectra of 23 comparison objects from the literature, and provide classifications and physical interpretations of interesting sources. Highlights include: (1) the identification of three G/K dwarfs that can be used as standard candles to study clumpiness and grain size in nearby molecular clouds because these objects are currently moving behind the clouds, (2) the confirmation/discovery of several M, L, and T dwarfs and one white dwarf whose spectrophotometric distance estimates place them 5-20 pc from the Sun, (3) the suggestion that the Na 'D' line be used as a diagnostic tool for interpreting and classifying metal-poor late-M and L dwarfs, (4) the recognition of a triple system including a carbon dwarf and late-M subdwarf, for which model fits of the late-M subdwarf (giving [Fe/H] ~ -1.0) provide a measured metallicity for the carbon star, and (5) a possible 24-pc-distant K5 dwarf + peculiar red L5 system with an apparent physical separation of 0.1 pc.
description: 62 pages with 80 figures, accepted for publication in The Astrophysical Journal Supplement Series, 23 Mar 2016; second version fixes a few small typos and corrects the footnotes for Table 4
A Fast Algorithm for Lattice Hyperonic Potentials
Creators: name: Nemura, Hidekatsu
name: Aoki, Sinya
name: Doi, Takumi
name: Gongyo, Shinya
name: Hatsuda, Tetsuo
name: Ikeda, Yoichi
name: Inoue, Takashi
name: Iritani, Takumi
name: Ishii, Noriyoshi
name: Miyamoto, Takaya
name: Murano, Keiko
name: Sasaki, Kenji
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We describe an efficient algorithm to compute a large number of baryon-baryon interactions from $NN$ to $ΞΞ$ by means of HAL QCD method, which lays the groundwork for the nearly physical point lattice QCD calculation with volume $(96a)^4\approx$($8.2$fm)$^4$. Preliminary results of $ΛN$ potential calculated with quark masses corresponding to ($m_π$,$m_{K}$)$\approx$(146,525)MeV are presented.
description: Talk given at the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015), Sendai, Japan, 7-12 September, 2015, 4 pages, 3 figures
title: An ETI Perspective -The role of tidal energy in a future UK low carbon energy system
Creators: name: ETI
Publisher: name: ETI
Year: 2017
Subjects: subject: Marine
subject: RENEWABLE ENERGY SOURCES (Ocean Energy)

description: An ETI Perspective - Tidal energy is a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity, offering low risk and zero emissions energy. This short document summarises the main outcomes of phase 1, and introduces phase 2 with the MeyGen project, a new tidal stream generator in the Inner Sound of the Pentland Firth
A Study of Intent-based Networking
Creators: Lihe Fan
Publisher: name: University of Alberta Library
Year: 2023

Intent-Based Networking (IBN) is an automated process supported by some software. Unlike the old manual configuring processes, Deeper intelligence and analysis are involved in Intent-Based Networking. An outcome, so-called intent, can be made by the network administrator, while the administrator does not need to know the exact process of achieving the outcome. Instead, the network software can help determine how to get the outcome using intelligent technology. Compared to the regular network, there are some advantages that an intent-based network provides. IBN reduces the amount of manual operation, improves the ability of analysis, accelerates the speed of troubleshooting, and has better security. In general, it could provide significant timesaving, especially regarding network configuration and reaction to network issues. Intent-based networking depends on artificial intelligence and machine learning to prescribe and perform activities and react to network concerns. The software analyzes the given intent and then finishes the jobs if the intent requires them. With AI technology, intent-based networking has more capability to automate networking tasks than regular software-defined networking. (“What is intent-based networking,” n.d.)

This report aims to analyze and study the design, application, and other aspects of Intent-Based Networking. It compares it with the manual process of network configuring and explores the relationship between IBN and Software-Defined Networks (SDN), then learn about how intent-based networking works with business intent.
title: ESME - Sensitivity Studies For Nuclear (Presentation)
Creators: name: Milne, S.
Publisher: name: ETI
Year: 2015
Subjects: subject: Nuclear
subject: NUCLEAR FISSION and FUSION (Nuclear Fission - Other nuclear fission)
subject: OTHER CROSS-CUTTING TECHNOLOGIES or RESEARCH (Energy system analysis)

description: A PowerPoint presentation exploring sensitivity studies for nuclear. This slide set coversESME as an economic modelSensitivity studies for nuclear – approachData from PPSS and ANT projectsUpdated ESME baselineSMR Deployment levels influenced byCAPEXFirst Operations Date For UK FOAK SMRConfiguration for CHP deployment to energise district heating systemsRequirement for flexible power deliveryThe case for CHP SMRsImpact on the cost of energy system transition transitionSMRs as a hedge technology for energy securityThis work was partly funded via IDCORE, the Industrial Doctorate Centre for Offshore Renewable Energy, which trains research engineers whose work in conjunction with sponsoring companies aims to accelerate the deployment of offshore wind, wave and tidal-current technologies
Effect of a stochastic electric field on plasma confinement in FTU
Creators: name: Martorelli, Roberto
name: Montani, Giovanni
name: Carlevaro, Nakia
Publisher: name: arXiv
Year: 2015
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We discuss a stochastic model for the behavior of electrons in a magnetically confined plasma having axial symmetry. The aim of the work is to provide an explanation for the density limit observed in the Frascati Tokamak Upgrade machine. The dynamical framework deals with an electron embedded in a stationary and uniform magnetic field and affected by an orthogonal random electric field. The behavior of the average plasma profile is determined by the appropriate Fokker-Planck equation associated to the considered model and the disruptive effects of the stochastic electric field is shown. The comparison between the addressed model and the experimental data allows to fix the relevant spatial scale of such a stochastic field. It is found to be of the order of the Tokamak micro-physics scale, i.e. few millimeters. Moreover, it is clarified how the diffusion process outlines a dependence on the magnetic field as $\sim B^{-3/2}$.
description: 10 pages, 3 figures
title: Preparing For the Deployment Of A UK SMR By 2030 (Presentation)
Creators: name: Middleton, M.
Publisher: name: ETI
Year: 2016
Subjects: subject: Nuclear
subject: NUCLEAR FISSION and FUSION (Nuclear Fission - Nuclear supporting technologies)

description: ETI’s Strategy Manager Mike Middleton presented “Preparing For the Deployment Of A UK SMR By 2030” at the Small Modular Reactors Summit.on 19th October 2016. This slide set covers:Introduction to ETI and ESME, ETI’s modelling toolConclusions from published ETI insights – role for nuclear in a low carbon energy systemFurther ETI Projects Relevant To UK SMRsKey Elements Of A UK SMR Development ProgrammeDeveloper And Vendor – Typical Relationship From UK GW Reactor New Build ProjectsApproach To the ETI’s SMR Deployment Enablers ProjectWork Breakdown Structure In SDE AnalysisThe Critical Path Of A 2030 ScheduleIntegrated Schedule Leading To FOAK Operations By 2030Enabling Activities In the First 5 YearsServices Required From A UK SMRSMRs For CHP – Analysis Of Impact Of Module Size and thermal EfficiencyCHP – Comparison With Earlier Work and Impact On Internal Rate of ReturnExploiting the Economies Of Multiples –UK GDA and Coping With VariantsComparison Of Potential Early SMR Sites Using Ranking FactorsConclusions - Preparing for deployment of a UK SMR by 2030Backup SlidesPriorities for the UK energy systemMarket led Schedule – First Operations 2040?Licensing Preparations From Around 2021Work Breakdown Structure In DetailEconomic Impact Of Air Cooling Condensers –Electricity Only and CHP
Thermalization of parton spectra in the color-flux-tube model
Creators: name: Ryblewski, Radoslaw
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Detailed study of thermalization of the momentum spectra of partons produced via decays of the color flux tubes due to the Schwinger tunneling mechanism is presented. The collisions between particles are included in the relaxation time approximation specified by different values of the shear viscosity to entropy density ratio. At first we show that, to a good approximation, the transverse-momentum spectra of the produced patrons are exponential, irrespectively from the assumed value of the viscosity of the system and the freeze-out time. This thermal-like behaviour may be attributed to specific properties of the Schwinger tunneling process. In the next step, in order to check the approach of the system towards genuine local equilibrium, we compare the local slope of the model transverse-momentum spectra with the local slope of the fully equilibrated reference spectra characterised by the effective temperature that reproduces the energy density of the system. We find that the viscosity corresponding to the AdS/CFT lower bound is necessary for thermalization of the system within about two fermis.
description: 16 pages,14 figures, typos fixed, version submitted to JPG
Speciation and Dissolution of Hydrogen in the Proto-Lunar Disk
Creators: name: Pahlevan, Kaveh
name: Karato, Shun-ichiro
name: Fegley, Bruce
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Despite very high temperatures accompanying lunar origin, indigenous water in the form of OH has been unambiguously observed in Apollo samples in recent years. Such observations have prompted questions about the abundance and distribution of lunar hydrogen. Here, we investigate the related question of the origin of lunar H: is the hydrogen observed a remnant of a much larger initial inventory that was inherited from a wet Earth but partly depleted during the process of origin, or was hydrogen quantitatively lost from the lunar material, with water being delivered to lunar reservoirs via subsequent impacts after the origins sequence? Motivated by recent results pointing to a limited extent of hydrogen escape from the gravity field of the Earth during lunar origin, we apply a newly developed thermodynamic model of liquid-vapor silicates to the proto-lunar disk to interrogate the behavior of H as a trace element in the energetic aftermath of the giant impact. We find that: (1) pre-existing H-bearing molecules are rapidly dissociated at the temperatures considered (3,100-4,200 K) and vaporized hydrogen predominantly exists as OH(v), H(v) and MgOH(v) for nearly the full range of thermal states encountered in the proto-lunar disk, (2) despite such a diversity in the vapor speciation, which reduces the water fugacity and favors hydrogen exsolution from co-existing liquids, the equilibration of the vapor atmosphere with the disk liquid results in significant dissolution of H into proto-lunar magmas, and (3) equilibrium H isotopic fractionation in this setting is limited to < 10 per mil and the terrestrial character of lunar D/H recently inferred should extend to such a precision if liquid-vapor equilibration in the proto-lunar disk is the process that gave rise to lunar hydrogen. Taken together, these results implicate dissolution as the process responsible for establishing lunar H abundances.
description: 37 pages, 5 figures, 2 tables; added typos, updated figures
Fractional Choquard Equation with Critical Nonlinearities
Creators: name: Mukherjee, Tuhina
name: Sreenadh, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this article, we study the Brezis-Nirenberg type problem of nonlinear Choquard equation involving a fractional Laplacian \[ (-\De)^s u = \left( \int_{\Om}\frac{|u|^{2^*_{μ,s}}}{|x-y|^μ}\mathrm{d}y \right)|u|^{2^*_{μ,s}-2}u +\la u \; \text{in } \Om,\] where $\Om $ is a bounded domain in $\mathbb R^n$ with Lipschitz boundary, $\la $ is a real parameter, $s \in (0,1)$, $n >2s$ and $2^*_{μ,s}= (2n-μ)/(n-2s)$ is the critical exponent in the sense of Hardy-Littlewood-Sobolev inequality. We obtain some existence, multiplicity, regularity and nonexistence results for solution of the above equation using variational methods.
description: 32 pages. arXiv admin note: text overlap with arXiv:1604.00826 by other authors
drones-07-00191-v2 (4).pdf
Creators: name: Tupayachi, Jose
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 401404
subject: Industrial engineering
classificationCode: 350901
subject: Air transportation and freight services

description: The use of drones for package delivery, commonly known as drone delivery or unmanned aerial vehicle (UAV) delivery, has gained significant attention from academia and industries. Compared to traditional delivery methods, it provides greater flexibility, improved accessibility, increased speed and efficiency, enhanced safety, and even some environmental benefits. With the increasing interest in this technology, it is crucial for researchers and practitioners to understand the current state of the art in drone delivery. This paper aims to review the current literature on drone delivery and identify research trends, challenges, and future research directions. Specifically, the relevant literature is identified and selected using a systematic literature review approach. We then categorize the literature according to the characteristics and objectives of the problems and thoroughly analyze them based on mathematical formulations and solution techniques. We summarize key challenges and limitations associated with drone delivery from technological, safety, societal, and environmental aspects. Finally, potential research directions are identified.
Serendipitous discovery of a projected pair of QSOs separated by 4.5 arcsec on the sky
Creators: name: Heintz, K. E.
name: Fynbo, J. P. U.
name: Krogager, J. -K.
name: Vestergaard, M.
name: Møller, P.
name: Arabsalmani, M.
name: Geier, S.
name: Noterdaeme, P.
name: Ledoux, C.
name: Saturni, F. G.
name: Venemans, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the serendipitous discovery of a projected pair of quasi-stellar objects (QSOs) with an angular separation of $Δθ=4.50$ arcsec. The redshifts of the two QSOs are widely different: one, our programme target, is a QSO with a spectrum consistent with being a narrow line Seyfert 1 AGN at $z=2.05$. For this target we detect Lyman-$α$, \ion{C}{4}, and \ion{C}{3]}. The other QSO, which by chance was included on the spectroscopic slit, is a Type 1 QSO at a redshift of $z=1.68$, for which we detect \ion{C}{4}, \ion{C}{3]} and \ion{Mg}{2}. We compare this system to previously detected projected QSO pairs and find that only about a dozen previously known pairs have smaller angular separation.
description: 4 pages, 3 figures. Accepted for publication in AJ
Static Magnetic Proximity Effect in Pt Layers on Sputter-Deposited NiFe2O4 and on Fe of Various Thicknesses Investigated by XRMR
Creators: name: Kuschel, Timo
name: Klewe, Christoph
name: Bougiatioti, Panagiota
name: Kuschel, Olga
name: Wollschläger, Joachim
name: Bouchenoire, Laurence
name: Brown, Simon D.
name: Schmalhorst, Jan-Michael
name: Meier, Daniel
name: Reiss, Günter
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The longitudinal spin Seebeck effect is detected in sputter-deposited NiFe2O4 films using Pt as a spin detector and compared to previously investigated NiFe2O4 films prepared by chemical vapor deposition. Anomalous Nernst effects induced by the magnetic proximity effect in Pt can be excluded for the sputter-deposited NiFe2O4 films down to a certain limit, since x-ray resonant magnetic reflectivity measurements show no magnetic response down to a limit of 0.04 μB per Pt atom comparable to the case of the chemicallydeposited NiFe2O4 films. These differently prepared films have various thicknesses. Therefore, we further studied Pt/Fe reference samples with various Fe thicknesses and could confirm that the magnetic proximity effect is only induced by the interface properties of the magnetic material.
description: 4 pages, 4 figures
Teleparallel loop quantum cosmology in a system of intersecting branes
Creators: name: Sepehri, Alireza
name: Pradhan, Anirudh
name: Beesham, A.
name: de Haro, Jaume
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, some authors have removed the big bang singularity in teleparallel Loop Quantum Cosmology (LQC) and have shown that the universe may undergo a number of oscillations. We investigate the origin of this type of teleparallel theory in a system of intersecting branes in M-theory in which the angle between them changes with time. This system is constructed by two intersecting anti-D8-branes, one compacted D4-brane and the other a D3-brane. These branes are built by joining M0-branes which develop in decaying fundamental strings. The compacted D4-brane is located between two intersecting anti-D8 branes and glues to one of them. Our universe is located on the D3 brane which wraps the D4 brane from one end and sticks to one of the anti-D8 branes from another one. In this system, there are three types of fields, corresponding to compacted D4 branes, intersecting branes and D3-branes. These fields interact with each other and make the angle between branes oscillate. By decreasing this angle and approaching the intersecting anti-D8 branes towards each other, the D4 brane rolls, the D3 brane wraps around the D4 brane, and t he universe contracts. By separating the intersecting branes and increasing the angle, the D4 brane rolls in the opposite direction, the D3 brane separates from it and the expansion branch begins. Also, the interaction between branes in this system gives us the exact form of the relevant Lagrangian for teleparallel LQC.
description: 11 pages
Observational Challenges for the Standard FLRW Model
Creators: name: Buchert, Thomas
name: Coley, Alan A.
name: Kleinert, Hagen
name: Roukema, Boudewijn F.
name: Wiltshire, David L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We summarise some of the main observational challenges for the standard Friedmann-Lemaitre-Robertson-Walker cosmological model and describe how results recently presented in the parallel session `Large--scale Structure and Statistics' (DE3) at the `Fourteenth Marcel Grossman Meeting on General Relativity' are related to these challenges.
description: 17 pages; references added. Matches published version in Int. J. Mod. Phys. D; Report on Parallel Session DE3 of MG14
Collisionless Encounters and the Origin of the Lunar Inclination
Creators: name: Pahlevan, Kaveh
name: Morbidelli, Alessandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Moon is generally thought to have formed from the debris ejected by the impact of a planet-sized object with the proto-Earth towards the end of planetary accretion. Modeling of the impact process predicts that the lunar material was disaggregated into a circumplanetary disk and that lunar accretion subsequently placed the Moon in a near equatorial orbit. Forward integration of the lunar orbit from this initial state predicts a modern inclination at least an order of magnitude smaller than the lunar value, a long-standing discrepancy known as the lunar inclination problem. Here we show that the modern lunar orbit provides a sensitive record of gravitational interactions with Earth-crossing planetesimals not yet accreted at the time of the Moon-forming event. The excited lunar orbit can naturally be reproduced via interaction with a small quantity of mass (corresponding to 0.0075-0.015 ME eventually accreted to the Earth) carried by a few bodies, consistent with constraints and models of late accretion. While the process has a stochastic element, the observed value of the lunar inclination is among the most likely outcomes for a wide range of parameters. The excitation of the lunar orbit is most readily reproduced via collisionless encounters with strong tidal dissipation on the early Earth. This mechanism obviates the necessity of previously proposed (but idealized) excitation mechanisms and can constrain the planet formation context of the Moon-forming event and the pristineness of the dynamical state of the Earth-Moon system.
description: 24 pages, 6 figures; updated figures
Submillimeter H$_2$O megamasers in NGC 4945 and the Circinus galaxy
Creators: name: Pesce, D. W.
name: Braatz, J. A.
name: Impellizzeri, C. M. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 321 GHz observations of five AGN from ALMA Cycle 0 archival data: NGC 5793, NGC 1068, NGC 1386, NGC 4945, and the Circinus galaxy. Submillimeter maser emission is detected for the first time towards NGC 4945, and we present a new analysis of the submillimeter maser system in Circinus. None of the other three galaxies show maser emission, though we have detected and imaged the continuum from every galaxy. Both NGC 4945 and Circinus are known to host strong ($\gtrsim 10$ Jy) 22 GHz megamaser emission, and VLBI observations have shown that the masers reside in the innermost $\sim 1$ parsec of the galaxies. The peak flux densities of the 321 GHz masers in both systems are substantially weaker (by a factor of $\sim$100) than what is observed at 22 GHz, though the corresponding isotropic luminosities are more closely matched (within a factor of $\sim$10) between the two transitions. We compare the submillimeter spectra presented here to the known 22 GHz spectra in both galaxies, and we argue that while both transitions originate from the gaseous environment near the AGN, not all sites are necessarily in common. In Circinus, the spectral structure of the 321 GHz masers indicates that they may trace the accretion disk at radii interior to the 22 GHz masers. The continuum emission in NGC 4945 and NGC 5793 shows a spatial distribution indicative of an origin in the galactic disks (likely thermal dust emission), while for the other three galaxies the emission is centrally concentrated and likely originates from the nucleus.
description: 9 pages, 3 figures, accepted for publication in ApJ
CIRCULAR ECONOMY IN CAR ELECTRONICS A CASE STUDY OF THE COMBIMETER AND THE INFOTAINMENT OF THE SEAT LEON II MODEL
Creators: name: Ortego, Abel
name: Valero, Alicia
name: Van Schaik, Antoinette
name: Iglesias-Émbil, Marta
name: Reuter, Markus
name: Alcoceba, Samuel
Publisher: name: Zenodo
Year: 2024

description: This paper analyzes the loss of mineral capital associated with the car electronics’ EoL through the thermodynamic rarity indicator. This indicator considers the scarcity of the minerals in the earth’s crust needed to obtain the commodities, as well as the energy required for their extraction and refining. In addition, this paper analyzes the recovery of resources in car electronics considering the modular disassembly based approach to recycling as defined in this work. for different recycling processing routes, which are suitable for recycling these car electronic partsare carried out. Thus, Recycling/recovery rates for each of the commodities are calculated by the application of advanced recycling process simulation models, which in fact virtually design or digitally twin the metallurgical and/or other final treatment processes which are best applied to optimize recycling of the contained materials and compounds.Moreover, this work assesses the importance of the disassembly of the car parts into different material groups or fractions to improve recyclability. A close link is made here between disassembly analyses and material (in)compatiblities in (metallurgical) processing options and know-how as captured by the developed recycling simulation models.This aspect is very relevant since disassembly processes are associated with high personnel costs, which may not be justified by a moderately higher recovery rate of raw materials at the car’s EoL. As a case study, the combimeter and the infotainment of a SEAT Leon II have been analyzed, since both electronic parts are among the most critical ones in a conventional car considering the contained metals and their low functional recycling.