cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-dimensional inference and confidence sets of models
Creators: name: Lewis, Rebecca
Publisher: name: Imperial College London
Year: 2023

description: In high-dimensional regression problems, a key aim is to identify a sparse model that fits the data well. This may be used to form accurate predictions or to gain subject-matter understanding. When strong dependence is present among covariates, it is common for many models to fit the data equally well. Whilst it is sufficient to report a single model for prediction, when the goal is to gain subject-matter understanding, Cox & Battey (2017) argue that a confidence set of models – a set consisting of all models of appropriate fit – should be reported and propose a method to achieve this aim. This thesis provides a theoretical elucidation of this approach, and based on the results, explores further ideas in high-dimensional data analysis.
Effective Description of Higher-Order Scalar-Tensor Theories
Creators: name: Langlois, David
name: Mancarella, Michele
name: Noui, Karim
name: Vernizzi, Filippo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Most existing theories of dark energy and/or modified gravity, involving a scalar degree of freedom, can be conveniently described within the framework of the Effective Theory of Dark Energy, based on the unitary gauge where the scalar field is uniform. We extend this effective approach by allowing the Lagrangian in unitary gauge to depend on the time derivative of the lapse function. Although this dependence generically signals the presence of an extra scalar degree of freedom, theories that contain only one propagating scalar degree of freedom, in addition to the usual tensor modes, can be constructed by requiring the initial Lagrangian to be degenerate. Starting from a general quadratic action, we derive the dispersion relations for the linear perturbations around Minkowski and a cosmological background. Our analysis directly applies to the recently introduced Degenerate Higher-Order Scalar-Tensor (DHOST) theories. For these theories, we find that one cannot recover a Poisson-like equation in the static linear regime except for the subclass that includes the Horndeski and so-called "beyond Horndeski" theories. We also discuss Lorentz-breaking models inspired by Horava gravity.
description: References added; matches version to appear on JCAP
Holographic equipartition and the maximization of entropy
Creators: name: B, Krishna P
name: Mathew, Titus K
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: \begin{abstract} The accelerated expansion of the universe can be interpreted as a tendency to satisfy the holographic equipartition. It can be expressed by a simple law, $ΔV = Δt\left(N_{surf}-εN_{bulk}\right),$ where $V$ is the Hubble volume in Plank units, $t$ is the cosmic time plank units and $N_{surf/bulk}$ is the degrees of freedom on the horizon/bulk of the universe. We show that this holographic equipartition law effectively implies the maximization of entropy. In the cosmological context, a system that obeys the holographic equipartition law behaves as an ordinary macroscopic system that proceeds to an equilibrium state of maximum entropy. We consider the standard $Λ$CDM model of the universe and have shown that it is consistent with the holographic equipartition law. Analyzing the entropy evolution we find that it also proceeds to an equilibrium state of maximum entropy.
description: 16 pages, 4 figures
Spectral bounds for Schrödinger operators in dimensions one and two
Creators: name: Read, Larry Alexander
Publisher: name: Imperial College London
Year: 2023

description: This thesis investigates Lieb-Thirring and Cwikel-Lieb-Rozenblum (CLR) type inequalities for Schrödinger operators in dimensions one and two, with a focus on overcoming the weak coupling problem associated with the failure of the CLR inequality in these dimensions. To this end we start by investigating three two-dimensional Schrödinger operators with extra repulsive factors in the form of: a repulsive Hardy potential, a restriction to antisymmetric functions, and an Aharonov-Bohm magnetic field. Under the assumption that the electric potential is radially non-increasing we establish semi-classical bounds on the number of negative eigenvalues for each of these operators. Our proof lies in generalising a one-dimensional bound of Calogero and Cohn to operator-valued potentials. For the same operators we then derive a family of weighted CLR type inequalities by applying the Birman-Schwinger principle. An interpolation argument leads us to ascertain weak forms, which we show to be saturated in the strong coupling limit by a class of long-range potentials. In the Aharonov-Bohm case this enables us to deduce the optimal dependence of the constants on the flux of the field. Finally in one dimension, we examine Schrödinger operators with an additional fixed attractive potential. Following the method of factorisation we derive Lieb-Thirring type bounds which measure the distance between the eigenvalues of the original and the perturbed operator. Applying this to the Pölsch-Teller potential leads to an improvement of the Lieb-Thirring inequality for partial sums of eigenvalues.
Pulsar Positioning System: A quest for evidence of extraterrestrial engineering
Creators: name: Vidal, Clement
Publisher: name: arXiv
Year: 2017
Subjects: subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Pulsars have at least two impressive applications. First, they can be used as highly accurate clocks, comparable in stability to atomic clocks; secondly, a small subset of pulsars, millisecond X-ray pulsars, provide all the necessary ingredients for a passive galactic positioning system. This is known in astronautics as X-ray pulsar-based navigation (XNAV). XNAV is comparable to GPS, except that it operates on a galactic scale. I propose a SETI-XNAV research program to test the hypothesis that this pulsar positioning system might be an instance of galactic-scale engineering by extraterrestrial beings (section 4). The paper starts by exposing the basics of pulsar navigation (section 2), continues with a critique of the rejection of the extraterrestrial hypothesis when pulsars were first discovered (section 3). The core section 4 proposes lines of inquiry for SETI-XNAV, related to: the pulsar distribution and power in the galaxy; their population; their evolution; possible pulse synchronizations; pulsar usability when navigating near the speed of light; decoding galactic coordinates; directed panspermia; and information content in pulses. Even if pulsars are natural, they are likely to be used as standards by ETIs in the galaxy (section 5). I discuss possible objections and potential benefits for humanity, whether the research program succeeds or not (section 6).
description: Major revision, article accepted for publication in the International Journal of Astrobiology. 51 pages, 11 figures, 3 tables, 2 argumentative maps
The concentration of potentially toxic elements (PTEs) in fruit juices: a global systematic review, meta-analysis and probabilistic health risk assessment
Creators: name: Khazaei, Salman
name: Ghane, Elaheh Talebi
name: Bashirian, Saeid
name: Mehri, Fereshteh
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 60506 Virology

description: This study was conducted to estimate the contamination of potentially toxic elements (PTEs) in fruit juice, e.g. apple, grape, mango, orange, peach, and pineapple. The related studies regarding the concentration of PTEs in fruit juice which have been published in recommended databases including PubMed, Embase, Web of Science and Scopus from 7 January 1969 to 20 February 2020 were analysed. Also, the health risk assessment for consumers due to PTEs ingestion via consuming various fruit juices was evaluated using target hazard quotient (THQ). Among 701 retrieved citations in the identification step, 44 articles were included in this conducted meta-analysis. In this context, the overall rank order of PTEs mean concentrations in the fruit juices were as follows: iron (Fe) >zinc (Zn)> copper (Cu)> lead (Pb) >nickel (Ni)> cadmium (Cd)> in apple and orange, Cu> Zn> Pb in grape, Fe> Zn>Cu>Ni>Cd>Pb in mango, Fe>Zn>Cu>Ni >Pb>Cd in peach and Cu>Zn>Cd>Ni>As in pineapple. Our results showed that the highest concentration of Pb and Cd were 0.075 and 0.204 mg/kg in orange and pineapple, respectively. The concentration of As in apple and orange juices was similar (0.003 mg/kg). Regarding Ni, Cu, Zn and Fe, the highest concentrations were 0.188, 0.508, 0.562 and 16.712 mg/kg in peach, mango and pineapple, respectively. The assessment of non-carcinogenic risk indicated that risk pattern was different in various countries. In addition, fruit juice consumers did not have a significant risk because of the ingestion of PTEs.
Chiral spin liquid on kagome antiferromagnet induced by Dzyaloshinskii-Moriya interaction
Creators: name: Messio, Laura
name: Bieri, Samuel
name: Lhuillier, Claire
name: Bernu, Bernard
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quantum spin liquid material herbertsmithite is described by an antiferromagnetic Heisenberg model on the kagome lattice with non-negligible Dzyaloshinskii-Moriya interaction~(DMI). A well established phase transition to the $\mathbf q=0$ long-range order occurs in this model when the DMI strength increases, but the precise nature of a small-DMI phase remains controversial. Here, we describe a new phase obtained from Schwinger-boson mean-field theory that is stable at small DMI, and which can explain the dispersionless spectrum seen in inelastic neutron scattering experiment by Han et al (Nature (London) 492, 406 (2012)}). It is a time-reversal symmetry breaking $\mathbb Z_2$ spin liquid, with the unique property of a small and constant spin gap in an extended region of the Brillouin zone. The phase diagram as a function of DMI and spin size is given, and dynamical spin structure factors are presented.
description: 6 pages, 4 figures, 1 table
Adaptive DCTNet for Audio Signal Classification
Creators: name: Xian, Yin
name: Pu, Yunchen
name: Gan, Zhe
name: Lu, Liang
name: Thompson, Andrew
Publisher: name: arXiv
Year: 2016
Subjects: subject: Sound (cs.SD)
subject: FOS: Computer and information sciences

description: In this paper, we investigate DCTNet for audio signal classification. Its output feature is related to Cohen's class of time-frequency distributions. We introduce the use of adaptive DCTNet (A-DCTNet) for audio signals feature extraction. The A-DCTNet applies the idea of constant-Q transform, with its center frequencies of filterbanks geometrically spaced. The A-DCTNet is adaptive to different acoustic scales, and it can better capture low frequency acoustic information that is sensitive to human audio perception than features such as Mel-frequency spectral coefficients (MFSC). We use features extracted by the A-DCTNet as input for classifiers. Experimental results show that the A-DCTNet and Recurrent Neural Networks (RNN) achieve state-of-the-art performance in bird song classification rate, and improve artist identification accuracy in music data. They demonstrate A-DCTNet's applicability to signal processing problems.
description: International Conference of Acoustic and Speech Signal Processing (ICASSP). New Orleans, United States, March, 2017
Top-Down Holographic $G$-Structure Glueball Spectroscopy at (N)LO in $N$ and Finite Gauge Coupling
Creators: name: Sil, Karunava
name: Yadav, Vikas
name: Misra, Aalok
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The top-down type IIB holographic dual of large-$N$ thermal QCD as constructed in arXiv:0902.1540 involving a fluxed resolved warped deformed conifold, its delocalized type IIA SYZ mirror as well as its M-theory uplift constructed in arXiv:1306.4339 - both in the finite gauge coupling ($g_s\stackrel{
description: v2:1+55 pages, LaTeX; references and clarifying remarks added, shortened by deleting old appendices, a sub-section and a table; to appear in Eur.Phys.J.C
Optical signature of Weyl electronic structures in tantalum pnictides Ta$Pn$ ($Pn=$ P, As)
Creators: name: Kimura, Shin-ichi
name: Yokoyama, Hiroko
name: Watanabe, Hiroshi
name: Sichelschmidt, Jörg
name: Süß, Vicky
name: Schmidt, Marcus
name: Felser, Claudia
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To investigate the electronic structure of Weyl semimetals Ta$Pn$ ($Pn=$P, As), optical conductivity [$σ(ω)$] spectra are measured over a wide range of photon energies and temperatures, and these measured values are compared with band calculations. Two significant structures can be observed: a bending structure at $\hbarω\sim$85 meV in TaAs, and peaks at $\hbarω\sim$ 50 meV (TaP) and $\sim$30 meV (TaAs). The bending structure can be explained by the interband transition between saddle points connecting a set of $W_2$ Weyl points. The temperature dependence of the peak intensity can be fitted by assuming the interband transition between saddle points connecting a set of $W_1$ Weyl points. Owing to the different temperature dependence of the Drude weight in both materials, it is found that the Weyl points of TaAs are located near the Fermi level, whereas those of TaP are further away.
description: 8 pages, 6 figures
Iron-induced association between selenium and humic substances in groundwater from deep sedimentary formations
Creators: name: Terashima, Motoki
name: Endo, Takashi
name: Kimuro, Shingo
name: Beppu, Hikari
name: Nemoto, Kazuaki
name: Amano, Yuki
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: Science Policy

description: To better understand the impact of natural organic matters (NOM) on facilitating 79Se migration in underground environments, the association mechanism between Se and humic substance (HS) in groundwater was investigated through incubation experiments using groundwater samples under abiotic and biotic conditions and speciation analyses using a DAX-8 resin isolation technique and a size exclusion chromatography (SEC) coupled online to ultraviolet–visible (UV–Vis) and inductively coupled plasma mass spectrometry (ICP-MS) detection (SEC-UV-ICP-MS). Selenite added into the groundwater was reduced to elemental Se only when microbial activity was stimulated by a nutrient. The DAX-8 resin isolation technique showed that Se associated with HS in both the oxidizing and reducing conditions, but the proportion of the associated Se to the total dissolved Se was the highest under the reducing condition. The SEC-UV-ICP-MS analyses of Se, Fe, and HS extracted from the DAX-8 resin showed that there is a fraction of Se that simultaneously elutes with Fe and HS. Logarithmic peak areas of Se and Fe associated with HS under the moderately oxidizing conditions were linearly correlated regardless of the presence of microorganisms and nutrient (r = 0.947, p ≤ 0.01 with the addition of Se; r = 0.995, p < 0.01 without the addition of Se). The SEC chromatogram of Se associated with HS under the reducing condition was well-matched with those under the moderately oxidizing conditions. Therefore, these suggest that Fe-induced association between Se and HS can preferentially occur in the groundwater conditions.
Floquet engineering of long-range p-wave superconductivity: Beyond the high-frequency limit
Creators: name: Li, Zeng-Zhao
name: Lam, Chi-Hang
name: You, J. Q.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has been shown that long-range {\it p}-wave superconductivity in a Kitaev chain can be engineered via an ac field with a high frequency [Benito et al., Phys. Rev. B 90, 205127 (2014)]. For its experimental realization, however, theoretical understanding of Floquet engineering with a broader range of driving frequencies becomes important. In this work, focusing on the ac-driven tunneling interactions of a Kitaev chain, we investigate effects from the leading correction to the high-frequency limit on the emergent {\it p}-wave superconductivity. Importantly, we find new engineered long-range {\it p}-wave pairing interactions that can significantly alter the ones in the high-frequency limit at long interaction ranges. We also find that the leading correction additionally generates nearest-neighbor {\it p}-wave pairing interactions with a renormalized pairing energy, long-range tunneling interactions, and in particular multiple pairs of Floquet Majorana edge states that are destroyed in the high- frequency limit.
description: 13 pages, 8 figures
Ultrafast carrier thermalization in lead iodide perovskite probed with two-dimensional electronic spectroscopy
Creators: name: Richter, Johannes M.
name: Branchi, Federico
name: Camargo, Franco Valduga de Almeida
name: Zhao, Baodan
name: Friend, Richard H.
name: Cerullo, Giulio
name: Deschler, Felix
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In band-like semiconductors, charge carriers form a thermal energy distribution rapidly after optical excitation. In hybrid lead halide perovskites, the cooling of such thermal carrier distributions occurs on timescales of ~300 fs via carrier-phonon scattering. However, the initial build-up of the thermal distribution proved difficult to resolve with pump-probe techniques due to the requirement of high resolution, both in time and in energy. Here, we use two-dimensional electronic spectroscopy with sub-10fs resolution to directly observe the carrier interactions that lead to the formation of a thermal carrier distribution. We find that thermalization occurs dominantly via carrier-carrier scattering under the investigated fluences and report the dependence of carrier scattering rates on excess energy and carrier density. We extract characteristic carrier thermalization times from below 10 fs to 85 fs. These values allow for mobilities of up to 500 cm^2 V^(-1) s^(-1) at carrier densities lower than 2x10^19 cm^(-3) and limit the time for carrier extraction in hot carrier solar cells.
Anisotropic stars for spherically symmetric spacetimes satisfying the Karmarkar condition
Creators: name: Maurya, S. K.
name: Ratanpal, B. S.
name: Govender, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new class of solution describing an anisotropic stellar configuration satisfying Karmarkar's condition i.e. spherically symmetric metric of embedding class 1, is reported. It has been shown that the compact star model is physically well-behaved and meet all the physical requirements for a stable configuration in hydrostatic equilibrium. Our model describes compact stars like Vela X-1 and 4U1608-52 to a very good approximation.
Generation of path-encoded Greenberger-Horne-Zeilinger states
Creators: name: Bergamasco, N.
name: Menotti, M.
name: Sipe, J. E.
name: Liscidini, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the generation of Greenberger-Horne-Zeilinger (GHZ) states of three path-encoded photons. Inspired by the seminal work of Bouwmeester et al. [1] on polarization-entangled GHZ states, we find a corresponding path representation for the photon states of an optical circuit, identify the elements required for the state generation, and propose a possible implementation of our strategy. Besides the practical advantage of employing an integrated system that can be fabricated with proven lithographic techniques, our example suggests that it is possible to enhance the generation efficiency by using microring resonators.
description: 8 pages, 4 figures
Covariant variational approach to Yang-Mills Theory: Thermodynamics
Creators: name: Quandt, Markus
name: Reinhardt, Hugo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The thermodynamics of $SU(2)$ Yang-Mills theory in the covariant variational approach is studied by relating the free action density in the background of a non-trivial Polyakov loop to the pressure of the gluon plasma. The correct subtraction of the vacuum contribution in the free action density is argued for. The Poisson resummed expression for the pressure can be evaluated analytically in limiting cases, and shows the correct Stefan-Boltzmann limit at $T \to \infty$, while the limit $T \to 0$ is afflicted by artifacts due to massless modes in the confined phase. Several remedies to remove these artifacts are discussed. Using the numerical $T=0$ solutions for the ghost and gluon propagators in the covariant variational approach as input, the pressure, energy density and interaction strength are calculated and compared to lattice data.
description: 25 pages, 16 pdf figures, pdflatex; fixed a missing factor in the free energy; revised parts of section 4 and 5; added 4 references
Modular and duality properties of surface operators in N=2* gauge theories
Creators: name: Ashok, S. K.
name: Billo, M.
name: Dell'Aquila, E.
name: Frau, M.
name: John, R. R.
name: Lerda, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the instanton partition function of the four-dimensional N=2* SU(N) gauge theory in the presence of a generic surface operator, using equivariant localization. By analyzing the constraints that arise from S-duality, we show that the effective twisted superpotential, which governs the infrared dynamics of the two-dimensional theory on the surface operator, satisfies a modular anomaly equation. Exploiting the localization results, we solve this equation in terms of elliptic and quasi-modular forms which resum all non-perturbative corrections. We also show that our results, derived for monodromy defects in the four-dimensional theory, match the effective twisted superpotential describing the infrared properties of certain two-dimensional sigma models coupled either to pure N=2 or to N=2* gauge theories.
description: 51 pages, v3: references added, typos fixed, footnote added, some small changes in the text, appendix B streamlined. Matches the published version
To stealth or not to stealth: Thermodynamics of stealth black holes
Creators: name: Bakopoulos, Athanasios
name: Karakasis, Thanasis
name: Papantonopoulos, Eleftherios
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using Euclidean methods we investigate the thermodynamics of stealth black hole solutions, which are solutions that geometrically are indistinguishable from those of general relativity, however they are accompanied by a non-trivial additional field that does not back-react to the metric. We find that in general, one can observe shifts in the mass and/or the entropy of such black holes, hence, at least at the thermodynamic level, the stealth solutions may be distinguished by the those of general relativity. We also point out an example, the {\it{bona fide stealth}}, where a non-trivial scalar field can accompany an (A)dS-Schwarzschild black hole without altering the thermodynamic quantities. We point out that thermodynamic discrepancies arise due to the additional boundary terms emanating from the stealth fields, where care should be given in order for the theory at hand to possess a well-defined variational procedure.
description: 13 pages, references and clarifications added, accepted for publication in PRD
Blow-up for semilinear wave equations with the scale invariant damping and super-Fujita exponent
Creators: name: Lai, Ning-An
name: Takamura, Hiroyuki
name: Wakasa, Kyouhei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: primary 35L71, secondary 35B44

description: The blow-up for semilinear wave equations with the scale invariant damping has been well-studied for sub-Fujita exponent. However, for super-Fujita exponent, there is only one blow-up result which is obtained in 2014 by Wakasugi in the case of non-effective damping. In this paper we extend his result in two aspects by showing that: (I) the blow-up will happen for bigger exponent, which is closely related to the Strauss exponent, the critical number for non-damped semilinear wave equations; (II) such a blow-up result is established for a wider range of the constant than the known non-effective one in the damping term.
description: 19 pages. This is the accepted version by JDE
Observation of robust flat-band localization in driven photonic rhombic lattices
Creators: name: Mukherjee, Sebabrata
name: Thomson, Robert R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate that a flat-band state in a quasi-one-dimensional rhombic lattice is robust in the presence of external drivings along the lattice axis. The lattice was formed by periodic arrays of evanescently coupled optical waveguides, and the external drivings were realized by modulating the paths of the waveguides. We excited a superposition of flat-band eigenmodes at the input and observed that this state does not diffract in the presence of static as well as high-frequency sinusoidal drivings. This robust localization is due to destructive interference of the analogous wavefunction and is associated with the symmetry in the lattice geometry. We then excited the dispersive bands and observed Bloch oscillations and coherent destruction of tunneling. {\textcopyright} 2017 Optical Society of America.
description: 5 pages, 7 figures
2013 Baja transmission design : The manufacturing process
Creators: name: Reed, Michael
Publisher: name: Unknown
Year: 2018

description: The purpose of this project is to create a manufacturing process of a transmission that is
integrated with a planetary gear set to meet a 4,000-unit annual demand. University of Southern
Indiana's Baja team has been in need of a transmission that will meet SAE Baja regulations. The
Baja vehicle will be a prototype for a reliable, maintainable, ergonomic, and economic production
vehicle. It is assumed that the operational hours of the facility are twenty-four hours, five days a
week for fifty weeks out of the year. It is also assumed that the facility has no spatial restrictions
and has been purchased. By working backwards from final product and exploding the components
enables the ability to select which parts are manufactured and purchased. The cells are categorized
into the following production areas: Sun Shaft, CVT Shaft, Output Shaft, Non-Integrated Gears,
Bushings, Ring Gear, Carrier Plate, Carrier Pins and Output Sleeve, and Assembly. Cutting times
are calculated using equations learned from the ENGR 362 manufacturing course at the University
of Southern Indiana. The longest cycle time is 482 minutes and occurs when producing eight gears.
The longest cycle time for the shafts is 175 minutes and occurs in the sun shaft cell. After making
the proper components for the product, assembly of the final product begins. Assembling the
product requires 103 minutes. Purchasing a customized transmission of this nature is affordable.
The fixed costs of this transmission totals to be $666,850 and includes consultations, machinery,
and other designing costs. Annually, the costs will be $5,809,545 and include labor and materials.
The cost of the machinery is returned once 4,000 units are sold. The benefits and cost of the
transmission would give USI's Baja team a competitive advantage in their events.
Thermal switching of indirect interlayer exchange in magnetic multilayers
Creators: name: Polishchuk, D. M.
name: Tykhonenko-Polishchuk, Yu. O.
name: Kravets, A. F.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Applied Physics (physics.app-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a magnetic multilayer layout, in which the indirect exchange coupling (IEC also known as RKKY) can be switched on and off by a slight change in temperature. We demonstrate such on/off IEC switching in a Fe/Cr/FeCr-based system and obtain thermal switching widths as small as 10--20~K, essentially in any desired temperature range, including at or just above room temperature. These results add a new dimension of tunable thermal control to IEC in magnetic nanostructures, highly technological in terms of available materials and operating physical regimes.
description: 3 figures, Supplementary Info
Momentum analyticity of the holographic electric polarizability in 2+1 dimensions
Creators: name: Yin, Lei
name: Ren, Hai-cang
name: Lee, Ting-Kuo
name: Hou, Defu
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The static electric polarization of a holographic field theory dual to the Einstein-Maxwell theory in the background of $AdS_4$ with a Reissner-Nordstöm (AdS-RN) black hole is investigated. We prove that the holographic polarization is a meromorphic functions in complex momentum plane and locate analytically the asymptotic distribution of the poles along two straight lines parallel to the imaginary axis for a large momentum magnitude. The results are compared with the numerical result on Friedel-like poles of the same holographic model reported in the literature and with the momentum singularities of the one-loop polarization in weak-coupling spinor QED$_3$ and scalar QED$_3$ with the similarities and differences discussed.
description: 31 pages, 2 figures
A Cosmic Selection Rule for Glueball Dark Matter Relic Density
Creators: name: Soni, Amarjit
name: Xiao, Huangyu
name: Zhang, Yue
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We point out a unique mechanism to produce the relic abundance for glueball dark matter from a gauged $SU(N)_d$ hidden sector which is bridged to the standard model sector through heavy vectorlike quarks colored under gauge interactions from both sides. A necessary ingredient of our assumption is that the vectorlike quarks, produced either thermally or non-thermally, are abundant enough to dominate the universe for some time in the early universe. They later undergo dark color confinement and form unstable vectorlike-quarkonium states which annihilate decay and reheat the visible and dark sectors. The ratio of entropy dumped into two sectors and the final energy budget in the dark glueballs is only determined by low energy parameters, including the intrinsic scale of the dark $SU(N)_d$, $Λ_d$, and number of dark colors, $N_d$, but depend weakly on parameters in the ultraviolet such as the vectorlike quark mass or the initial condition. We call this a cosmic selection rule for the glueball dark matter relic density.
description: 7 pages, 3 figures; v2 references added; v3 published version
Product of two Kochergin flows with different exponents is not standard
Creators: name: Kanigowski, Adam
name: Wei, Daren
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We study the standard(zero entropy loosely Bernoulli or loosely Kronecker) property for products of Kochergin smooth flows on $\mathbb{T}^2$ with one singularity. These flows can be represented as special flows over irrational rotations of the circle and under roof functions which are smooth on $\mathbb{T}^2\setminus \{0\}$ with a singularity at $0$. We show that there exists a full measure set $\mathscr{D}\subset\mathbb{T}$ such that the product system of two Kochergin flows with different power of singularities and rotations from $\mathscr{D}$ is not standard.
description: Revised version, to appear in Studia Mathematica
Cyber Warfare and Security Techniques in Saudi Arabia: Challenges and Strategies for Smart Cities
Creators: name: Ohoud, S. Al-Harthi
name: Jehad, F.  Al-Amri
Publisher: name: CARSON JOURNAL
Year: 2024
Subjects: Cyber warfare, cybersecurity, encryption, watermark, electronic combat units, information security, data security, smart cities.

description: This study focuses on the use of security techniques in cyber warfare in Saudi Arabia to address the increasing risks of cyber threats to national security. The authors explore how cyberspace impacts concepts of security, conflict, and war and discuss various types of cyber warfare. The study highlights the role of electronic combat units in defense and offense and emphasizes the importance of information and data security in countering cyber threats. The authors also examine different approaches to achieve information security, such as encryption and watermarking, and provide an overview of the challenges of cybercrime, particularly in the context of smart cities. The study concludes with a discussion of strategies to enhance cybersecurity in Saudi Arabia
Chebyshev Reduced Basis Function applied to Option Valuation
Creators: name: de Frutos, Javier
name: Gaton, Victor
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Finance (q-fin.CP)
subject: FOS: Economics and business

description: We present a numerical method for the frequent pricing of financial derivatives that depends on a large number of variables. The method is based on the construction of a polynomial basis to interpolate the value function of the problem by means of a hierarchical orthogonalization process that allows to reduce the number of degrees of freedom needed to have an accurate representation of the value function. In the paper we consider, as an example, a GARCH model that depends on eight parameters and show that a very large number of contracts for different maturities and asset and parameters values can be valued in a small computational time with the proposed procedure. In particular the method is applied to the problem of model calibration. The method is easily generalizable to be used with other models or problems.
Sub-Microsecond X-Ray Imaging Using Hole-Collecting Schottky type CdTe with Charge-Integrating Pixel Array Detectors
Creators: name: Becker, Julian
name: Tate, Mark W.
name: Shanks, Katherine S.
name: Philipp, Hugh T.
name: Weiss, Joel T.
name: Purohit, Prafull
name: Chamberlain, Darol
name: Gruner, Sol M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: CdTe is increasingly being used as the x-ray sensing material in imaging pixel array detectors for x-rays, generally above 20 keV, where silicon sensors become unacceptably transparent. Unfortunately CdTe suffers from polarization, which can alter the response of the material over time and with accumulated dose. Most prior studies used long integration times or CdTe that was not of the hole-collecting Schottky type. We investigated the temporal response of hole-collecting Schottky type CdTe sensors on timescales ranging from tens of nanoseconds to several seconds. We found that the material shows signal persistence on the timescale of hundreds of milliseconds attributed to the detrapping of a shallow trap, and additional persistence on sub-microsecond timescales after polarization. The results show that this type of CdTe can be used for time resolved studies down to approximately 100 ns. However quantitative interpretation of the signal requires careful attention to bias voltages, polarization and exposure history.
description: revised version after peer-review
Integrable systems, symmetries and quantization
Creators: name: Sepe, Daniele
name: Ngoc, San Vu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Symplectic Geometry (math.SG)
subject: Spectral Theory (math.SP)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J35, 53D05, 70H06, 81Q20

description: These notes correspond to a mini-course given at the Poisson 2016 conference in Geneva. Starting from classical integrable systems in the sense of Liouville, we explore the notion of non-degenerate singularity and expose recent research in connection with semi-toric systems. The quantum and semiclassical counterpart will also be presented, in the viewpoint of the inverse question: from the quantum mechanical spectrum, can you recover the classical system?
description: 91 pages, 4 figures
The Supercurrent and Einstein equations in the Superconformal formulation
Creators: name: Ferrara, Sergio
name: Samsonyan, Marine
name: Tournoy, Magnus
name: Van Proeyen, Antoine
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a new expression for the supercurrent and its conservation in curved ${\cal N}=1$, $D=4$ superspace using the superconformal approach. The first component of the superfield, whose lowest component is the vector auxiliary field gives the (super)Einstein equations. Its trace and couplings to conformal and non-conformal matter is presented. In a suitable dilatational gauge, the conformal gauge, we obtain an update of the Callan-Coleman-Jackiw improved currents for conformal matter, containing $R$-symmetry corrections for a new traceless covariantly conserved energy--momentum tensor. We observe that in the Poincaré gauge, where standard Poincaré supergravity is usually formulated, the currents are not improved and then the higher conformal symmetry of the matter sector is obscured. The curvature multiplets are used to find supersymmetric curved backgrounds and some examples are exhibited in agreement with existing results.
description: 43 pages; v2: Typos corrected. A subsection, an appendix and references added
Thrinchostoma upembae Pauly & Eardley 2013, sp. nov.
Creators: name: Pauly, Alain
name: Eardley, Connal
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Thrinchostoma
Thrinchostoma upembae

description: Thrinchostoma upembae Pauly & Eardley sp. nov.
(Figs 66, 67b)
HOLOTYPE ♂: D.R. CONGO, Parc National de l’Upemba (PNU), Gorges de la Palenge, 1150m, n°471a, 10- 14.VI.1947, leg. G.F. de Witte (RMCA).
DIAGNOSIS. Male. Species well characterized by the apical lobe of the hind tibiae truncated and with large basitarsi (fig. 66c). Last segments of the antennae not bent, segments short. S5 with a fringe of setae. Female unknown.
DESCRIPTION. Male. Black body, length 8 mm. Head: longer than wide (L / W = 1.15); malar area ¼ as long as eye; antennae 13 segmented, last segment straight; anterior margin of clypeus pale yellow. Mesosoma: scutum with dense punctuation, punctures slightly larger and more widely spaced in centre (i = d). Hind legs: femora slightly swollen, apical lobes of tibia rather long, pale yellow, basitarsi broader than in other species, entirely pale yellow. Forewings with a spots of setae. Metasoma: black; apical margin of S5 bilobed and with setae.
description: Published as part of Pauly, Alain & Eardley, Connal, 2013, A Revision of Afrotropical Thrinchostoma de Saussure, 1890 (Hymenoptera: Apoidea: Halictidae), pp. 1-76 in Belgian Journal of Entomology 12 on page 68, DOI: 10.5281/zenodo.13486944
VITALISE D13.1 Dissemination and Communication Plan
Creators: name: Pellumbaj Ada
name: Trochidis Ilias
Publisher: name: Zenodo
Year: 2021

description: This document (D13.1 Dissemination and Communication Plan) describes the dissemination and communication plan of VITALISE project, elaborating on the incentives, objectives, methodology, tools, channels and evaluation methods identified as most suitable within the framework of “WP13 Dissemination, Exploitation, Openness and Sustainability”. The Dissemination and Communication Plan aims to ensure the visibility, dissemination and exploitation of the progress and findings of VITALISE across the project target groups and audiences, aiming at creating awareness about the existence of VITALISE, its objectives, progress and results. In order for the dissemination planning and methodology to be effective, it is important to lay its foundations on the profiles of the target audiences and formulate the communication content into coherent messages. For this reason, this plan provides further details on how the consortium intends to identify, mobilise and engage with stakeholder groups and its means of doing so. The Dissemination and Communication Plan also covers: Benefits and results delivered to stakeholders; Messages we want to deliver to each for the stakeholder groups; Activities that will best ensure the involvement of stakeholders; The way to ensure interested stakeholders understand the benefits of the results and access and exploit project results; Key Performance Indicators (KPIs) to evaluate the dissemination activities’ effectiveness; A timeline about what needs to be achieved and when. The most appropriate channels and communication characteristics for each target group are defined in detail to guide all consortium partners and support communication of the project. The instruments to reach VITALISE stakeholder groups focus on the press, event participation and active online presence (website, social media). Additionally, to ensure effective communication the team will create a GDPR-compliant stakeholder communication list, and will use contact management software (e.g., MailChimp) to store personal data relating to those members registered on the project mailing list. The design and production of all the related dissemination materials throughout the duration of the project, including a project website, logo, posters, etc., are also essential for the success of the dissemination strategy. VITALISE dissemination and communication activities will be implemented under the constant evaluation, reviewing and monitoring of the project’s dissemination leader, VILABS. VILABS will also review the dissemination and communication plan’s progress in meeting KPIs regularly (every 6 months) to ensure its effectiveness. Overall, the Dissemination and Communication Plan will set the ground for the future exploitation and sustainability of the project’s results, developing a clear understanding of the value stemming from the project outputs
Peripheral transverse densities of the baryon octet from chiral effective field theory and dispersion analysis
Creators: name: Alarcón, J. M.
name: Blin, A. N. Hiller
name: Vacas, M. J. Vicente
name: Weiss, C.
Publisher: name: arXiv
Year: 2017
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: The baryon electromagnetic form factors are expressed in terms of two-dimensional densities describing the distribution of charge and magnetization in transverse space at fixed light-front time. We calculate the transverse densities of the spin-1/2 flavor-octet baryons at peripheral distances b = O(M_π^{-1}) using methods of relativistic chiral effective field theory (χEFT) and dispersion analysis. The densities are represented as dispersive integrals over the imaginary parts of the form factors in the timelike region (spectral functions). The isovector spectral functions on the two-pion cut t > 4 M_π^2 are calculated using relativistic χEFT including octet and decuplet baryons. The χEFT calculations are extended into the ρmeson mass region using an N/D method that incorporates the pion electromagnetic form factor data. The isoscalar spectral functions are modeled by vector meson poles. We compute the peripheral charge and magnetization densities in the octet baryon states, estimate the uncertainties, and determine the quark flavor decomposition. The approach can be extended to baryon form factors of other operators and the moments of generalized parton distributions.
description: 23 pages, 12 figures, 3 tables. Typos corrected and discussion about the anomalous thresholds added. Matches the journal version
Thrinchostoma de Saussure 1890
Creators: name: Pauly, Alain
name: Eardley, Connal
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Thrinchostoma

description: Key to the subgenera   (1) Very elongated head, especially very long malar area, equal to three quarters length of eye (fig. 1a) …............................................................................................... Subgenus Diagonozus
- Head and malar area shorter, not exceeding one quarter length of eye (fig. 1b) …..............(2)
 (2) Male: submarginal cells of fore wings without tuft of setae (fig. 2a). Female: calcaria on hind tibiae with many small teeth of similar size (fig. 2c).............. Subgenus Eothrincostoma
 - Male: wings with a tuft of characteristic setae on crossvein between second and third submarginal cells (fig. 2b). Female: calcaria on hind tibiae with first tooth well-developed and laminated (fig. 2d) …......................................................................... Subgenus Thrinchostoma
description: Published as part of Pauly, Alain & Eardley, Connal, 2013, A Revision of Afrotropical Thrinchostoma de Saussure, 1890 (Hymenoptera: Apoidea: Halictidae), pp. 1-76 in Belgian Journal of Entomology 12 on page 6, DOI: 10.5281/zenodo.13486944
ReMO  National Policy Briefs: Workshop / Roundtable on How to influence your (local) environment
Creators: name: Sundukova, Mayya
name: Gökalp, Gökçe
name: Parada, Filomena
name: Osmanovic, Dr. Sabina
name: Kovács, Karolina Eszter
name: Mijakoski, Dragan
Publisher: name: Zenodo
Year: 2024

description: Slides of the presentation / workshop given during the ReMO 2024: 3rd Conference of the Researcher Mental Health Observatory "Building a Network focused on Researcher Mental Health" 16th May 2024.

Workshop focused on presenting the current status of ReMO national reports on researcher mental health in European countries, with highlights from Southern and East European countries. Second part of the workshop focused on dissemination of the reports among relevant stakeholders, with guiding questions and practical tips. 

This work was supported by the COST Action CA19117 - Researcher Mental Health (ReMO) and was developed within the Working Group 1 "System Level" activities.