cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interacting Chaplygin gas revisited
Creators: name: Saha, Subhajit
name: Ghosh, Saumya
name: Gangopadhyay, Sunandan
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The implications of considering interaction between Chaplygin gas and a barotropic fluid with constant equation of state have been explored. The unique feature of this work is that assuming an interaction $Q \propto Hρ_d$, analytic expressions for the energy density and pressure have been derived in terms of the Hypergeometric $_2\text{F}_1$ function. It is worthwhile to mention that an interacting Chaplygin gas model was considered in 2006 by Zhang and Zhu, nevertheless, analytic solutions for the continuity equations could not be determined assuming an interaction proportional to $H$ times the sum of the energy densities of Chaplygin gas and dust. Our model can successfully explain the transition from the early decelerating phase to the present phase of cosmic acceleration. Arbitrary choice of the free parameters of our model through trial and error show at recent observational data strongly favors $w_m=0$ and $w_m=-\frac{1}{3}$ over the $w_m=\frac{1}{3}$ case. Interestingly, the present model also incorporates the transition of dark energy into the phantom domain, however, future deceleration is forbidden.
description: 8 pages, 6 figures; v2: Text expanded, Discussion improved, Conclusions modified, References updated; v3: Comments regarding model parameters and redshift of transition added following reviewer suggestions, Identical to published version
Stability of zero-growth economics analysed with a Minskyan model
Creators: name: Barrett, Adam B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: As humanity is becoming increasingly confronted by Earth's finite biophysical limits, there is increasing interest in questions about the stability and equitability of a zero-growth capitalist economy, most notably: if one maintains a positive interest rate for loans, can a zero-growth economy be stable? This question has been explored on a few different macroeconomic models, and both `yes' and `no' answers have been obtained. However, economies can become unstable whether or not there is ongoing underlying growth in productivity with which to sustain growth in output. Here we attempt, for the first time, to assess via a model the relative stability of growth versus no-growth scenarios. The model employed draws from Keen's model of the Minsky financial instability hypothesis. The analysis focuses on dynamics as opposed to equilibrium, and scenarios of growth and no-growth of output (GDP) are obtained by tweaking a productivity growth input parameter. We confirm that, with or without growth, there can be both stable and unstable scenarios. To maintain stability, firms must not change their debt levels or target debt levels too quickly. Further, according to the model, the wages share is higher for zero-growth scenarios, although there are more frequent substantial drops in employment.
description: 23 pages, 5 figures
Substrate effects on the exciton fine structure of black phosphorus quantum dots
Creators: name: de Sousa, J. S.
name: Lino, M. A.
name: da Costa, D. R.
name: Chaves, A.
name: Pereira, J. M.
name: Farias, G. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the size-dependent exciton fine structure in monolayer black phosphorus quantum dots (BPQDs) deposited on different substrates (isolated, Si and SiO$_2$) using a combination of tight-binding method to calculate the single-particle states, and the configuration interaction formalism to determine the excitonic spectrum. We demonstrate that the substrate plays a dramatic role on the excitonic gaps and excitonic spectrum of the QDs. For reasonably high dielectric constants ($\varepsilon_{sub} \sim \varepsilon_{Si} = 11.7 \varepsilon_0$), the excitonic gap can be described by a single power law $E_X(R) = E_X^{(bulk)} + C/R^γ$. For low dielectric constants $\varepsilon_{sub} \leq \varepsilon_{SiO_2} = 3.9 \varepsilon_0$, the size dependence of the excitonic gaps requires the sum of two power laws $E_X(R) = E_g^{(bulk)} + A/ R^{n} - B/R^{m}$ to describe both strong and weak quantum confinement regimes, where $A$, $B$, $C$, $γ$, $n$, and $m$ are substrate-dependent parameters. We also predict that the exciton lifetimes exhibit a strong temperature dependence, ranging between 2-8 ns (Si substrate) and 3-11 ns (SiO$_2$ substrate) for QDs up 10 nm in size.
ICC Intervention in the DRC
Creators: name: Blaisdell, Max
Publisher: name: University of Chicago
Year: 2022

description: Central to the study of international law in international relations is whether it and the legal institutions through which its practice flows can address or stem the worst kinds of human rights abuses. The International Criminal Court (ICC) has been one such attempt made by the international community to do just that. This paper analyses whether the ICC has had a deterrent effect on grievous human rights abuses in a context, the Democratic Republic of the Congo, where those abuses have been rife because of the ongoing civil conflicts that have spanned decades. Using time-series analysis and qualitative process tracing, this paper looked at the domestic institutional changes and trends in deliberate killings of civilians by both government and rebel forces to see if the ICC’s actions led to declines in violence. This paper finds support that certain ICC actions, specifically arrests and convictions, led to declines in violence by rebel groups, and that implementation of complementarity and social deterrence contributed to a decline in government forces killing of civilians. The implications of this paper are that future research should look at the effects of specific ICC actions in other contexts rather than dismissing or lumping them together generally.
A Census of Outflow to Magnetic Field Orientations in Nearby Molecular Clouds
Creators: name: Xu, Duo
name: Offner, Stella S. R.
name: Gutermuth, Robert
name: Tan, Jonathan C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We define a sample of 200 protostellar outflows showing blue and redshifted CO emission in the nearby molecular clouds Ophiuchus, Taurus, Perseus and Orion to investigate the correlation between outflow orientations and local, but relatively large-scale, magnetic field directions traced by Planck 353 GHz dust polarization. At high significance (p~1e-4), we exclude a random distribution of relative orientations and find that there is a preference for alignment of projected plane of sky outflow axes with magnetic field directions. The distribution of relative position angles peaks at ~30deg and exhibits a broad dispersion of ~50deg. These results indicate that magnetic fields have dynamical influence in regulating the launching and/or propagation directions of outflows. However, the significant dispersion around perfect alignment orientation implies that there are large measurement uncertainties and/or a high degree of intrinsic variation caused by other physical processes, such as turbulence or strong stellar dynamical interactions. Outflow to magnetic field alignment is expected to lead to a correlation in the directions of nearby outflow pairs, depending on the degree of order of the field. Analyzing this effect we find limited correlation, except on relatively small scales < 0.5 pc. Furthermore, we train a convolutional neural network to infer the inclination angle of outflows with respect to the line of sight and apply it to our outflow sample to estimate their full 3D orientations. We find that the angles between outflow pairs in 3D space also show evidence of small-scale alignment.
description: ApJ Accepted
Coma Cluster Ultra-Diffuse Galaxies Are Not Standard Radio Galaxies
Creators: name: Struble, Mitchell F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Matching members in the Coma cluster catalogue of ultra-diffuse galaxies (UDGs, Yagi et al. 2016) from SUBARU imaging with a very deep radio continuum survey source catalogue of the cluster (Miller et al. 2009) using the Karl G. Jansky Very Large Array (VLA) within a rectangular region of ~ 1.19 square degrees centred on the cluster core reveals matches consistent with random. An overlapping set of 470 UDGs and 696 VLA radio sources in this rectangular area finds 33 matches within a separation of 25 arcsec; dividing the sample into bins with separations bounded by 5 arcsec, 10 arcsec, 20 arcsec and 25 arcsec finds 1, 4, 17 and 11 matches. An analytical model estimate, based on the Poisson probability distribution, of the number of randomly expected matches within these same separation bounds is 1.7, 4.9, 19.4 and 14.2, each respectively consistent with the 95 percent Poisson confidence intervals of the observed values. Dividing the data into five clustercentric annuli of 0.1 degree, and into the four separation bins, finds the same result. This random match of UDGs with VLA sources implies that UDGs are not radio galaxies by the standard definition. Those VLA sources having integrated flux > 1 mJy at 1.4 GHz in Miller et al. (2009) without SDSS galaxy matches are consistent with the known surface density of background radio sources. We briefly explore the possibility that some unresolved VLA sources near UDGs could be young, compact, bright, supernova remnants of type Ia events, possibly in the intracluster volume.
description: 10 pages, 3 tables Revised version accepted for publication in MNRAS
Modeling of geocoronal solar wind charge exchange events detected with Suzaku
Creators: name: Ishi, Daiki
name: Ishikawa, Kumi
name: Miyoshi, Yoshizumi
name: Terada, Naoki
name: Ezoe, Yuichiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: A model of geocoronal solar wind charge exchange (SWCX) emission was built and compared to five Suzaku detections of bright geocoronal SWCX events. An exospheric neutral hydrogen distribution model, charge exchange cross sections, solar wind ion data taken with the ACE and WIND satellites, and magnetic field models of the Earth's magnetosphere are all combined in order to predict time-variable geocoronal SWCX emission depending on line-of-sight directions of the Suzaku satellite. The modeled average intensities of O VII emission lines were consistent with the observed ones within a factor of three in four out of the five cases except for an event in which a line-of-sight direction was toward the night side of the high-latitude magnetosheath and a major geomagnetic storm was observed. Those of O VIII emission lines were underestimated by a factor of three or more in all the five cases. On the other hand, the modeled O VII and O VIII light curves reproduced the observed ones after being scaled by ratios between the observed and modeled average intensities. In particular, short-term variations due to line-of-sight directions traversing cusp regions during an orbital motion of the Suzaku satellite were reproduced. These results are discussed in the context of model uncertainties.
description: 47 pages, 23 figures, accepted for publication in PASJ
The Impact of Initial-Final Mass Relations on Black Hole Microlensing
Creators: name: Rose, Sam
name: Lam, Casey Y.
name: Lu, Jessica R.
name: Medford, Michael
name: Hosek, Matthew W.
name: Abrams, Natasha S.
name: Ramey, Emily
name: Vasylyev, Sergiy S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Uncertainty in the initial-final mass relation (IFMR) has long been a problem in understanding the final stages of massive star evolution. One of the major challenges of constraining the IFMR is the difficulty of measuring the mass of non-luminous remnant objects (i.e. neutron stars and black holes). Gravitational wave detectors have opened the possibility of finding large numbers of compact objects in other galaxies, but all in merging binary systems. Gravitational lensing experiments using astrometry and photometry are capable of finding compact objects, both isolated and in binaries, in the Milky Way. In this work we improve the PopSyCLE microlensing simulation code in order to explore the possibility of constraining the IFMR using the Milky Way microlensing population. We predict that the Roman Space Telescope's microlensing survey will likely be able to distinguish different IFMRs based on the differences at the long end of the Einstein crossing time distribution and the small end of the microlensing parallax distribution, assuming the small ($π_E \lesssim 0.02$) microlensing parallaxes characteristic of black hole lenses are able to be measured accurately. We emphasize that future microlensing surveys need to be capable of characterizing events with small microlensing parallaxes in order to place the most meaningful constraints on the IFMR.
description: 24 pages, 17 figures Accepted to ApJ
Predictive Business Process Monitoring with LSTM Neural Networks
Creators: name: Tax, Niek
name: Verenich, Ilya
name: La Rosa, Marcello
name: Dumas, Marlon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Predictive business process monitoring methods exploit logs of completed cases of a process in order to make predictions about running cases thereof. Existing methods in this space are tailor-made for specific prediction tasks. Moreover, their relative accuracy is highly sensitive to the dataset at hand, thus requiring users to engage in trial-and-error and tuning when applying them in a specific setting. This paper investigates Long Short-Term Memory (LSTM) neural networks as an approach to build consistently accurate models for a wide range of predictive process monitoring tasks. First, we show that LSTMs outperform existing techniques to predict the next event of a running case and its timestamp. Next, we show how to use models for predicting the next task in order to predict the full continuation of a running case. Finally, we apply the same approach to predict the remaining time, and show that this approach outperforms existing tailor-made methods.
description: Accepted at the International Conference on Advanced Information Systems Engineering (CAiSE) 2017
Comparison of Cost Structures of Food Stores and Eating and Drinking Places
Creators: name: Crawford, Terry L.
name: Southard, Leland W.
name: Crawford, Terry L.
name: Southard, Leland W.
Publisher: name: Unknown
Year: 1970
Subjects: subject: Financial Economics
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Food stores
subject: eating places
subject: marketing costs and margins

description: Eating and drinking places have increased their dollar share of the total food market. They have a gross margin estimated at 2½ times that of food stores. Although gross margins for the two differ greatly because of the kinds of functions and services performed, individual operating expenses as a share of gross margin are similar. Labor, the largest expense, accounts for slightly over 40 percent of the gross margin of both type of businesses. Operating expenses as a proportion of sales tend to be lower for larger firms, indicating higher profit ratios.
description: Reprinted from the Marketing and Transportation Situation August 1970
The cavity of 3CR 196.1: H$α$ emission spatially associated with an X-ray cavity
Creators: name: Jimenez-Gallardo, A.
name: Sani, E.
name: Ricci, F.
name: Mazzucchelli, C.
name: Balmaverde, B.
name: Massaro, F.
name: Capetti, A.
name: Forman, W. R.
name: Kraft, R. P.
name: Venturi, G.
name: Gendron-Marsolais, M.
name: Prieto, M. A.
name: Marconi, A.
name: Peña-Herazo, H. A.
name: Baum, S. A.
name: O'Dea, C. P.
name: Lovisari, L.
name: Gilli, R.
name: Torresi, E.
name: Paggi, A.
name: Missaglia, V.
name: Tremblay, G. R.
name: Wilkes, B. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a multifrequency analysis of the radio galaxy 3CR 196.1 ($z = 0.198$), associated with the brightest galaxy of the cool core cluster CIZAJ0815.4-0303. This nearby radio galaxy shows a hybrid radio morphology and an X-ray cavity, all signatures of a turbulent past activity, potentially due to merger events and AGN outbursts. We present results of the comparison between $Chandra$ and VLT/MUSE data for the inner region of the galaxy cluster, on a scale of tens of kpc. We discovered H$α$ + [N II]$\lambda6584$ emission spatially associated with the X-ray cavity (at $\sim$10 kpc from the galaxy nucleus) instead of with its rim. This result differs from previous discoveries of ionized gas surrounding X-ray cavities in other radio galaxies harbored in galaxy clusters and could represent the first reported case of ionized gas filling an X-ray cavity, either due to different AGN outbursts or to the cooling of warm ($10^4
description: 15 pages, 8 figures, ApJ accepted, pre-proof version
Advances in R-matrices and their applications (after Maulik-Okounkov, Kang-Kashiwara-Kim-Oh,...)
Creators: name: Hernandez, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: R-matrices are the solutions of the Yang-Baxter equation. At the origin of the quantum group theory, they may be interpreted as intertwining operators. Recent advances have been made independently in different directions. Maulik-Okounkov have given a geometric approach to R-matrices with new tools in symplectic geometry, the stable envelopes. Kang-Kashiwara-Kim-Oh proved a conjecture on the categorification of cluster algebras by using R-matrices in a crucial way. Eventually, a better understanding of the action of transfer-matrices obtained from R-matrices led to the proof of several conjectures about the corresponding quantum integrable systems.
description: This is an English translation of the Bourbaki seminar 1129 (March 2017). The French version will appear in Ast\'erisque
Actuated exoskeleton hand
Creators: name: Weinzapfel, Evan
name: Mete, Alkan
Publisher: name: Unknown
Year: 2018

description: This project describes the designing, analyzing, and implementing of an actuating
exoskeleton hand, used to increase the strength, mobility, and endurance of the fingers. There
are many potential candidates that would benefit from a device that assists in doing just that,
such as, individuals who suffer from arthritis, peripheral neuropathy, tendonitis, stroke
patients, elderly, and many more. This exoskeleton will consist of a 3D printed exoskeleton
frame, actuated by servo motors, drove by an Arduino Uno and flex sensors, which pull cables
which act like tendons. Many prototypes were designed before following through with this
idea, which gave us a better understanding of how the hand and fingers work and what would
work best for the users. This design will provide the users the benefit of being able to grab
objects or open doors once again.
Continuous vibronic symmetries in Jahn-Teller models
Creators: name: Ribeiro, Raphael F.
name: Yuen-Zhou, Joel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a systematic study of Jahn-Teller (JT) models with continuous symmetries by explor- ing their algebraic properties. The compact symmetric spaces corresponding to JT models carrying a Lie group symmetry are identified, and their invariants used to reduce their adiabatic potential energy surfaces into orbit spaces. Each orbit consists of a set of JT distorted molecular structures with equal adiabatic electronic spectrum. Molecular motion may be decomposed into pseudorota- tional and radial. The former preserves the orbit, while the latter maps an orbit into another. The dimensionality and topology of the internal space of each orbit depends on the number of degener- ate states in its adiabatic electronic spectra. Furthermore, qualitatively different pseudorotational modes occur in orbits of different types. We also provide a simple proof that the electronic spectrum for the space of JT minimum-energy structures (trough) displays a universality predicted by the epikernel principle. This result is in turn used to prove the topological equivalence between bosonic (fermionic) JT troughs and real (quaternionic) projective spaces, a conclusion which has outstanding physical consequences, as explained in our work. The relevance of our study for the more common case of JT systems with only discrete point group symmetry, and for generic asymmetric molecular systems with conical intersections involving more than two states is likewise discussed. In particular, we show that JT models with continuous symmetries present the simplest models of conical intersections among an arbitrary number of electronic state crossings.
Non-financial_and_financial_information_in_an_integrated_report-_how_connectivity_affects_profession.pdf
Creators: name: Nandram, P.K.
Publisher: name: University of Amsterdam / Amsterdam University of Applied Sciences
Year: 2023
Subjects: subject: 15 Commerce, Management, Tourism and Services

description: RDMP for 'Non-financial and financial information in an integrated report: how connectivity affects professional and non-professional investors’ assessment of a firm’s performance, prospects, and their willingness to invest'
On the injection scale of the turbulence in the partially ionized very local interstellar medium
Creators: name: Xu, Siyao
name: Li, Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Space Physics (physics.space-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The cascade of magnetohydrodynamic (MHD) turbulence is subject to ion-neutral collisional damping and neutral viscous damping in the partially ionized interstellar medium. By examining the damping effects in the warm and partially ionized local interstellar medium, we find that the interstellar turbulence is damped by neutral viscosity at $\sim 261$ au and cannot account for the turbulent magnetic fluctuations detected by Voyager 1 and 2. The MHD turbulence measured by Voyager in the very local interstellar medium (VLISM) should be locally injected in the regime where ions are decoupled from neutrals for its cascade to survive the damping effects. With the imposed ion-neutral decoupling condition, and the strong turbulence condition for the observed Kolmogorov magnetic energy spectrum, we find that the turbulence in the VLISM is sub-Alfvénic, and its largest possible injection scale is $\sim 194$ au.
description: 9 pages, 2 figures, Accepted for publication in The Astrophysical Journal Letters
Spontaneous electric-polarization topology in confined ferroelectric nematics
Creators: name: Yang, Jidan
name: Zou, Yu
name: Tang, Wentao
name: Li, Jinxing
name: Huang, Mingjun
name: Aya, Satoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological spin and polar textures have fascinated people in different areas of physics and technologies. However, the observations are limited in magnetic and solid-state ferroelectric systems. Ferroelectric nematic is the first liquid-state ferroelectric that would carry many possibilities of spatially distributed polarization fields. Contrary to traditional magnetic or crystalline systems, anisotropic liquid crystal interactions can compete with the polarization counterparts, thereby setting a challenge in understating their interplays and the resultant topologies. Here, we discover chiral polarization meron-like structures during the emergence and growth of quasi-2D ferroelectric nematic domains, which are visualized by fluorescence confocal polarizing microscopy and second harmonic generation microscopies. Such micrometre-scale polarization textures are the modified electric variants of the magnetic merons. Unlike the conventional liquid crystal textures driven solely by the elasticity, the polarization field puts additional topological constraints, e.g., head-to-tail asymmetry, to the systems and results in a variety of previously unidentified polar topological patterns. The chirality can emerge spontaneously in polar textures and can be additionally biased by introducing chiral dopants. An extended mean-field modelling for the ferroelectric nematics reveals that the polarization strength of systems plays a dedicated role in determining polarization topology, providing a guide for exploring diverse polar textures in strongly-polarized liquid crystals.
Yang-Baxter Solution of Dimers as a Free-Fermion Six-Vertex Model
Creators: name: Pearce, Paul A.
name: Vittorini-Orgeas, Alessandra
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that dimers is Yang-Baxter integrable as a six-vertex model at the free-fermion point with crossing parameter $λ=\tfracπ{2}$. A one-to-many mapping of vertex onto dimer configurations allows the free-fermion solutions to be applied to the anisotropic dimer model on a square lattice where the dimers are rotated by 45 degrees compared to their usual orientation. This dimer model is exactly solvable in geometries of arbitrary finite size. In this paper, we establish and solve inversion identities for dimers with periodic boundary conditions on the cylinder. In the particle representation, the local face tile operators give a representation of the fermion algebra and the fermion particle trajectories play the role of nonlocal (logarithmic) degrees of freedom. In a suitable gauge, the dimer model is described by the Temperley-Lieb algebra with loop fugacity $β=2\cosλ=0$. At the isotropic point, the exact solution allows for the explicit counting of 45 degrees rotated dimer configurations on a periodic $M\times N$ rectangular lattice. We show that the modular invariant partition function on the torus is the same as symplectic fermions and critical dense polymers. We also show that nontrivial Jordan cells appear for the dimer Hamiltonian on the strip with vacuum boundary conditions. We therefore argue that, in the continuum scaling limit, the dimer model gives rise to a {\em logarithmic} conformal field theory with central charge c=-2, minimal conformal weight $Δ_{\text{min}}=-1/8$ and effective central charge $c_{\text{eff}}=1$.
MPEC 2023-R143 : 2023 RZ4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 RZ4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Microstructural investigations of the interaction between embedded fuel particles and Portland cement clinker
Creators: name: Linden, Charlotte
name: Böhm, Matthias
name: Geisler, Thorsten
name: Knöpfelmacher, Aneta
name: Bodendiek, Nils
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
In view of current climate and energy policies, the cement industry is striving to save emissions and is increasingly using alternative fuels (AF) for the clinker burning process. AF are generally more coarse-grained and have a higher probability to fall incompletely burned onto the clinker bed, where they become embedded and can lead to changes in the material by locally causing reducing conditions. However, the qualitative and quantitative understanding of relationships between fuel particle sizes and the resulting material properties of the clinker is still limited. Here, we show experimentally that local reducing conditions can indeed lead to the reduction of iron and thus to local changes of the phase assemblage. The altered oxygen partial pressure within the pore volume of the sample also causes a brown coloration of the clinker. The extent of the changes was found to depend on the fuel particle size and the residence time of the embedded fuel particles in the clinker bed in the kiln. The new qualitative and quantitative data enable the optimization of the clinker burning process, which in turn can lead to an increasing use of AF in the future.
A proposed atom interferometry determination of $G$ at $10^{-5}$ using a cold atomic fountain
Creators: name: Rosi, G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In precision metrology the determination of the Newtonian gravity constant $G$ represents a real problem, since its history is plagued by huge unknown discrepancies between a large number of independent experiments. In this paper we propose a novel experimental setup for measuring $G$ with a relative accuracy of $10^{-5}$ using a standard cold atomic fountain and matter wave interferometry. We discuss in details the major sources of systematic errors, providing also the expected statistical uncertainty. Feasibility of determining $G$ at a level of $10^{-6}$ level is also discussed.
description: Accepted for publication in Metrologia
Kołowy Inwentarz Radzenie Sobie ze Stresem – Wersja Sytuacyjna
Creators: name: Stanislawski, Krzysztof
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 520108
subject: Testing, assessment and psychometrics

description: Narzędzie powstało w ramach realizacji grantu nr 2023/07/X/HS6/00393 finansowanego przez Narodowe Centrum Nauki. Narzędzie jest udostępniane na zasadach licencji CC-0.
Direct measurement of nonequilibrium system entropy is consistent with Gibbs-Shannon form
Creators: name: Gavrilov, Momčilo
name: Chétrite, Raphaël
name: Bechhoefer, John
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Stochastic thermodynamics extends classical thermodynamics to small systems in contact with one or more heat baths. It can account for the effects of thermal fluctuations and describe systems far from thermodynamic equilibrium. A basic assumption is that the expression for Shannon entropy is the appropriate description for the entropy of a nonequilibrium system in such a setting. Here, for the first time, we measure experimentally this function. Our system is a micron-scale colloidal particle in water, in a virtual double-well potential created by a feedback trap. We measure the work to erase a fraction of a bit of information and show that it is bounded by the Shannon entropy for a two-state system. Further, by measuring directly the reversibility of slow protocols, we can distinguish unambiguously between protocols that can and cannot reach the expected thermodynamic bounds.
description: 9 pages, 3 figures, and supplemental material
Ultra high-Q WGM microspheres from ZBLAN for the mid-IR band
Creators: name: Tebeneva, Tatiana S.
name: Shitikov, Artem E.
name: Benderov, Oleg V.
name: Lobanov, Valery E.
name: Bilenko, Igor A.
name: Rodin, Alexander V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The advantages of high-quality-factor whispering gallery mode microresonators can be applied to develop novel photonic devices for the mid-IR range. ZBLAN (glass based on heavy metal fluorides) is one of the most promising materials to be used for this purpose due to low optical losses in the mid-IR. We developed original fabrication method based on melting of commercially available ZBLAN-based optical fiber to produce high-Q ZBLAN microspheres with the diameters of 250 to 350 $μ$m. We effectively excited whispering gallery modes in these microspheres and demonstrated high quality factor both at 1.55 $μ$m and 2.64 $μ$m. Intrinsic quality factor at telecom wavelength was shown $(5.4\pm0.4)\cdot10^8$ which is defined by the material losses in ZBLAN. In the mid-IR at 2.64 $μ$m we demonstrated record quality factor in ZBLAN exceeding $10^8$ which is comparable to the highest values of the Q-factor among all materials in the mid-IR.
Gravitomagnetic bending angle of light with finite-distance corrections in stationary axisymmetric spacetimes
Creators: name: Ono, Toshiaki
name: Ishihara, Asahi
name: Asada, Hideki
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: By using the Gauss-Bonnet theorem, the bending angle of light in a static, spherically symmetric and asymptotically flat spacetime has been recently discussed, especially by taking account of the finite distance from a lens object to a light source and a receiver [Ishihara, Suzuki, Ono, Asada, Phys. Rev. D 95, 044017 (2017)]. We discuss a possible extension of the method of calculating the bending angle of light to stationary, axisymmetric and asymptotically flat spacetimes. For this purpose, we consider the light rays on the equatorial plane in the axisymmetric spacetime. We introduce a spatial metric to define the bending angle of light in the finite-distance situation. We show that the proposed bending angle of light is coordinate-invariant by using the Gauss-Bonnet theorem. The non-vanishing geodesic curvature of the photon orbit with the spatial metric is caused in gravitomagnetism, even though the light ray in the four-dimensional spacetime follows the null geodesic. Finally, we consider Kerr spacetime as an example in order to examine how the bending angle of light is computed by the present method. The finite-distance correction to the gravitomagnetic deflection angle due to the Sun's spin is around a pico-arcsecond level. The finite-distance corrections for Sgr A$^{\ast}$ also are estimated to be very small. Therefore, the gravitomagnetic finite-distance corrections for these objects are unlikely to be observed with present technology.
description: 23 pages, 4 figures; appendix added, accepted by PRD
Moffatt eddies in electrohydrodynamic flows: numerical simulations and analyses
Creators: name: He, Xuerao
name: Sun, Zhihao
name: Zhang, Mengqi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study numerically a sequence of eddies in two-dimensional electrohydrodynamic (EHD) flows of a dielectric liquid, driven by an electric potential difference between a hyperbolic blade electrode and a flat plate electrode (or the blade-plate configuration). The electrically-driven flow impinges on the plate to generate vortices, which resemble Moffatt eddies (Moffatt, $\textit{J. Fluid Mech.}$ vol. 18, 1-18, 1964). Such a phenomenon in EHD was first reported in the experimental work of Perri $\textit{et al., J. Fluid Mech.}$ vol. 900, A12, 2020. We conduct direct numerical simulations of the EHD flow with three Moffatt-type eddies in a large computational domain at moderate electric Rayleigh numbers ($ T $, quantifying the strength of the electric field). The ratios of size and intensity of the adjacent eddies are examined and they can be compared favourably to the theoretical prediction of Moffatt; interestingly, the quantitative comparison is remarkably accurate for the two eddies in the farfield. Our investigation also shows that a larger $T$ strengthens the vortex intensity, and a stronger charge diffusion effect enlarges the vortex size. A sufficiently large $T$ can further result in an oscillating flow, consistent with the experimental observation. In addition, a global stability analysis of the steady blade-plate EHD flow is conducted. The global mode is detailedly characterised at different values of $T$. When $T$ is large, the confinement effect of the geometry in the center region may lead to an increased oscillation frequency. This work contributes to the quantitative characterisation of the Moffatt-type eddies in electrohydrodynamic flows.
Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
Creators: name: Dinh, D. N.
name: Merlo, L.
name: Petcov, S. T.
name: Vega-Alvarez, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Minimal Lepton Flavour Violation (MLFV) framework is discussed after the recent indication for CP violation in the leptonic sector. Among the three distinct versions of MLFV, the one with degenerate right-handed neutrinos will be disfavoured, if this indication is confirmed. The predictions for leptonic radiative rare decays and muon conversion in nuclei are analysed, identifying strategies to disentangle the different MLFV scenarios. The claim that the present anomalies in the semi-leptonic $B$-meson decays can be explained within the MLFV context is critically re-examined concluding that such an explanation is not compatible with the present bounds from purely leptonic processes.
description: 36 pages, 4 figures. V2: References added; version accepted for publication on JHEP
title: Mapping the Way Forward: Spatial Data Inventory and Insights for Marine Planning in Virginia, North Carolina, and South Carolina
Creators: name: Wright, Jennifer
name: Wylie, Meagan
name: Wilson, Rich
name: Theuerkauf, Seth
name: Morris, James A. Jr.
Publisher: name: NOAA National Centers for Coastal Ocean Science
publisherIdentifier: https://ror.org/05ba43f71
publisherIdentifierScheme: ROR
Year: 2024

description: NOAA technical memorandum NOS NCCOS ; 339
description: Offshore wind (OSW) energy planning efforts in the southeast region of the United States (US) catalyzed the need for data development to inform in-progress spatial analyses for OSW leases and transmission of energy to shore-based facilities. To address this need, the National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS), in partnership with the Bureau of Ocean Energy Management (BOEM), convened a marine spatial planning workshop in Beaufort, North Carolina on April 9th and 10th, 2024 [Federal Register Notice (89 FR 20638)]. This technical memorandum documents the outcomes of this two-day event.
Robust Ferromagnetism in Silicene Nanoflakes through Patterned Hydrogenation
Creators: name: Aghaei, Sadegh Mehdi
name: Torres, Ingrid
name: Calizo, Irene
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Considerably different properties emerge in nanomaterials as a result of quantum confinement and edge effects. In this study, the electronic and magnetic properties of quasi zero dimensional silicene nanoflakes (SiNFs) are investigated using first principles calculations. Whilst the zigzag edged hexagonal SiNFs exhibit nonmagnetic semiconducting character, the zigzag edged triangular SiNFs are magnetic semiconductors. One effective method of harnessing the properties of silicene is hydrogenation owing to its reversibility and controllability. From bare SiNFs to half hydrogenated and then to fully hydrogenated, a triangular SiNF experiences a change from ferrimagnetic to very strong ferromagnetic, and then to non-magnetic. Nonetheless, a hexagonal SiNF undergoes a transfer from nonmagnetic to very strong ferromagnetic, then to nonmagnetic. The half hydrogenated SiNFs produce a large spin moment that is directly proportional to the square of the flakes size. It has been revealed that the strong induced spin magnetizations align parallel and demonstrates a collective character by large range ferromagnetic exchange coupling, giving rise to its potential use in spintronic circuit devices. Spin switch models are offered as an example of one of the potential applications of SiNFs in tuning the transport properties by controlling the hydrogen coverage.
description: 21 pages, 8 figures
MPEC 2023-R144 : 2023 RA5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 RA5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Searching for converging flows of atomic gas onto a molecular cloud
Creators: name: Heyer, Mark
name: Goldsmith, Paul F.
name: Simon, Robert
name: Aladro, Rebeca
name: Ricken, Oliver
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new observations of [CII] fine structure line emission from an isolated molecular cloud using the upGREAT instrument onboard SOFIA. These data are analyzed together with archival CO=1-0 and HI 21 cm emission spectra to investigate the role of converging atomic gas flows in the formation of molecular clouds. Bright [CII] emission is detected throughout the mapped area that likely originates from photodissociation regions excited by UV radiation fields produced by newborn stars within the cloud. Upon spatial averaging of the [CII] spectra, we identify weak [CII] emission within velocity intervals where the HI 21 cm line is brightest; these are blue-shifted relative to velocities of the CO and bright [CII] emission by 4 km/s. The brightness temperatures, velocity dispersions, and alignment with HI 21 cm velocities connect this [CII] emission component to the cold, neutral atomic gas of the interstellar medium (CNM). We propose that this CNM feature is an accretion flow onto the far--side of the existing molecular cloud. The mass infall rate is 3.2x10**{-4} Msun/yr. There is no direct evidence of a comparable red--shifted component in the [CII] or HI 21 cm spectral lines that would indicate the presence of a converging flow.
description: 11 pages, 7 figures, accepted by ApJ
Formation and Eruption of Hot Channels during an M6.5 Class Solar Flare
Creators: name: Liu, Yanjie
name: Su, Yingna
name: Liu, Rui
name: Chen, Jialin
name: Liu, Tie
name: Ji, Haisheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the formation and eruption of hot channels associated with the M6.5 class flare (SOL2015-06-22T18:23) occurring in NOAA AR 12371 on 2015 June 22. Two flare precursors are observed before the flare main phase. Observations in 94 Å and 131 Å by SDO/AIA have revealed the early morphology of the first hot channel as a group of hot loops, which is termed as seed hot channel. A few seed hot channels are formed above the polarity inversion line (PIL) and the formation is associated with footpoint brightenings' parallel motion along the PIL, which proceeds into the early stage of the flare main phase. During this process, seed hot channels build up and rise slowly, being accelerated at the peak of the second precursor. They merge in the process of acceleration forming a larger hot channel, which then forms an "inverted γ" shape kinking structure. Before the flare peak, the second kinking hot channel with negative crossing appears near the first kinking hot channel that has erupted. The eruption of these two hot channels produce two peaks on the main flare's GOES light curve. The footpoint brightenings' propagation along the PIL indicate that the first kinking hot channel may be formed due to zipper reconnection. The occurrence of merging between seed hot channels observed by AIA is supported by the extrapolated nonlinear force-free field models. The observed writhing motion of the first kinking hot channel may be driven by the Lorentz force.
Entanglement Classification of Four-partite States under the SLOCC
Creators: name: Zangi, S. M.
name: Li, Jun-Li
name: Qiao, Cong-Feng
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a practical classification scheme for the four-partite entangled states under stochastic local operations and classical communication (SLOCC). By transforming a four-partite state into a triple-state set composed of two tripartite and one bipartite states, the entanglement classification is reduced to the classification of tripartite and bipartite entanglements. This reduction method has the merit of involving only the linear constrains, and meanwhile providing an insight into the entanglement character of the subsystems.
description: 17 pages, 1 figure; published in J. Phys. A: Math. Theor
Verzeichnis der mineralogischen, geologischen, urgeschichtlichen und hydrologischen Litteratur von Württemberg, Hohenzollern und den angrenzenden Gebieten. [Band] II
Creators: name: Unkn
Publisher: name: unkn
Year: 2021

description: Beilagen zu den Jahresheften des Vereins für Vaterländische Naturkunde in Württemberg
description: 2, 1903 [JVVNW 59, 1903]
Positive Definite Functions on Complex Spheres and their Walks through Dimensions
Creators: name: Massa, Eugenio
name: Peron, Ana Paula
name: Porcu, Emilio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A82, 42C10, 42C05, 30E10, 62M30

description: We provide walks through dimensions for isotropic positive definite functions defined over complex spheres. We show that the analogues of Montée and Descente operators as proposed by Beatson and zu Castell [J. Approx. Theory 221 (2017), 22-37] on the basis of the original Matheron operator [Les variables régionalisées et leur estimation, Masson, Paris, 1965], allow for similar walks through dimensions. We show that the Montée operators also preserve, up to a constant, strict positive definiteness. For the Descente operators, we show that strict positive definiteness is preserved under some additional conditions, but we provide counterexamples showing that this is not true in general. We also provide a list of parametric families of (strictly) positive definite functions over complex spheres, which are important for several applications.
Nachträge zur Litteratur von 1901 und die Litteratur von 1902
Creators: name: Schütze, Ewald
Publisher: name: unkn
Year: 2021

description: Beilagen zu den Jahresheften des Vereins für Vaterländische Naturkunde in Württemberg
description: 2, 1903 [JVVNW 59, 1903]