cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interlayer interaction, shear vibrational mode, and tribological properties of two-dimensional bilayers with a commensurate moiré pattern
Creators: name: Minkin, Alexander S.
name: Lebedeva, Irina V.
name: Popov, Andrey M.
name: Vyrko, Sergey A.
name: Poklonski, Nikolai A.
name: Lozovik, Yurii E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The potential energy surface (PES) of interlayer interaction of infinite twisted bilayer graphene is calculated for a set of commensurate moiré patterns using the registry-dependent Kolmogorov-Crespi empirical potential. The calculated PESs have the same shape for all considered moiré patterns with the unit cell size of the PES which is inversely related to the unit cell size of the moiré pattern. The amplitude of PES corrugations is found to decrease exponentially upon increasing the size of the moiré pattern unit cell. An analytical expression for such a PES including the first Fourier harmonics compatible with the symmetries of both layers is derived. It is shown that the calculated PESs can be approximated by the derived expression with the accuracy within 1%. This means that different physical properties associated with relative in-plane motion of graphene layers are interrelated and can be expressed analytically as functions of the amplitude of PES corrugations. In this way, we obtain the shear mode frequency, shear modulus, shear strength and barrier for relative rotation of the commensurate twisted layers to a fully incommensurate state for the considered moiré patterns. This barrier may possibly lead to the macroscopic robust superlubricity for twisted graphene bilayer with a commensurate moiré pattern. The conclusions made should be valid for diverse 2D systems of twisted commensurate layers.
description: 9 pages, 3 figures; Supplemental Material: 2 pages, 1 figure
Modeling and Analysis of a Two-Phase Thin Film Model with Insoluble Surfactant
Creators: name: Bruell, Gabriele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we consider a two-phase thin film consisting of two immiscible viscous fluids endowed with a layer of insoluble surfactant on the surface of the upper fluid. The governing equations for the two film heights and the surfactant concentration are derived using a lubrication approximation. Taking gravitational forces into account but neglecting capillary effects, the resulting system of evolution equations is parabolic, strongly coupled, of second order and degenerated in the equations for the two film heights. Incorporating on the contrary capillary forces and neglecting the effects of gravitation, the system of evolution equations is parabolic, degenerated and of fourth order for the film heights, strongly coupled to a second order transport equation for the surfactant concentration. Local well-posedness and asymptotic stability are shown for both systems.
Spectropolarimetric observations of an arch filament system with the GREGOR solar telescope
Creators: name: Balthasar, H.
name: Gömöry, P.
name: Manrique, S. J. González
name: Kuckein, C.
name: Kavka, J.
name: Kučera, A.
name: Schwartz, P.
name: Vašková, R.
name: Berkefeld, T.
name: Vera, M. Collados
name: Denker, C.
name: Feller, A.
name: Hofmann, A.
name: Lagg, A.
name: Nicklas, H.
name: Suárez, D. Orozco
name: Yabar, A. Pastor
name: Rezaei, R.
name: Schlichenmaier, R.
name: Schmidt, D.
name: Schmidt, W.
name: Sigwarth, M.
name: Sobotka, M.
name: Solanki, S. K.
name: Soltau, D.
name: Staude, J.
name: Strassmeier, K. G.
name: Volkmer, R.
name: von der Lühe, O.
name: Waldmann, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Arch filament systems occur in active sunspot groups, where a fibril structure connects areas of opposite magnetic polarity, in contrast to active region filaments that follow the polarity inversion line. We used the GREGOR Infrared Spectrograph (GRIS) to obtain the full Stokes vector in the spectral lines Si I 1082.7 nm, He I 1083.0 nm, and Ca I 1083.9 nm. We focus on the near-infrared calcium line to investigate the photospheric magnetic field and velocities, and use the line core intensities and velocities of the helium line to study the chromospheric plasma. The individual fibrils of the arch filament system connect the sunspot with patches of magnetic polarity opposite to that of the spot. These patches do not necessarily coincide with pores, where the magnetic field is strongest. Instead, areas are preferred not far from the polarity inversion line. These areas exhibit photospheric downflows of moderate velocity, but significantly higher downflows of up to 30 km/s in the chromospheric helium line. Our findings can be explained with new emerging flux where the matter flows downward along the fieldlines of rising flux tubes, in agreement with earlier results.
description: Proceedings 12th Potsdam Thinkshop to appear in Astronomische Nachrichten
Computer Algebra Derivation of the Bias of Burg Estimators
Creators: name: Zhang, Ying
name: McLeod, A. Ian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M10

description: A symbolic method is discussed which can be used to obtain the asymptotic bias and variance to order $O(1/n)$ for estimators in stationary time series. Using this method the bias to $O(1/n)$ of the Burg estimator in AR(1) and AR(2) models is shown to be equal to that of the least squares estimators in both the known and unknown mean cases. Previous researchers have only been able to obtain simulation results for this bias because this problem is too intractable without using computer algebra.
description: 11 pages
Measuring Tidal Dissipation in Giant Planets from Tidal Circularization
Creators: name: Mahmud, Mohammad M.
name: Penev, Kaloyan M.
name: Schussler, Joshua A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this project, we determined the constraints on the modified tidal quality factor, $Q_{pl}'$, of gas-giant planets orbiting close to their host stars. We allowed $Q_{pl}'$ to depend on tidal frequency, accounting for the multiple tidal waves with time-dependent frequencies simultaneously present on the planet. We performed our analysis on 78 single-star and single-planet systems, with giant planets and host stars with radiative cores and convective outer shells. We extracted constraints on the frequency-dependent $Q_{pl}'$ for each system separately and combined them to find general constraints on $Q_{pl}'$ required to explain the observed eccentricity envelope while simultaneously allowing the observed eccentricities of all systems to survive to the present day. Individual systems do not place tight constraints on $Q_{pl}'$. However, since similar planets must have similar tidal dissipation, we require that a consistent, possibly frequency-dependent, model must apply. Under that assumption, we find that the value of $\log_{10}Q_{pl}'$ for HJs is $5.0\pm0.5$ for the range of tidal period from 0.8 to 7 days. We did not see any clear sign of frequency dependence of $Q_{pl}'$.
description: Accepted for publication in MNRAS 19 pages, 11 figures, 2 tables
Global versus Local -- Mach's Principle versus the Equivalence Principle
Creators: name: Singleton, Douglas
name: Wilburn, Steve
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The equivalence principle is the conceptual basis for general relativity. In contrast Mach's principle, although said to have been influential on Einstein in his formulation of general relativity, has not been shown to be central to the structure of general relativity. In this essay we suggest that the quantum effects of Hawking and Unruh radiation are a manifestation of a {\it thermal} Mach's principle, where the local thermodynamic properties of the system are determined by the non-local structure of the quantum fields which determine the vacuum of a given spacetime. By comparing Hawking and Unruh temperatures for the same local acceleration we find a violation of the Einstein elevator version of the equivalence principle, which vanishes in the limit that the horizon is approached.
description: 9 pages revtex, no figures. Awarded an "honorable mention" in the Gravity Research Foundation 2016 Essays on Gravitation contest. To be published in special edition of IJMPD
Distributional effects of carbon taxation in passenger transport with lump-sum offset: low income households, retirees and families would benefit in Germany
Creators: name: Eisenmann, Christine
name: Steck, Felix
name: Hedemann, Lars
name: Lenz, Barbara
name: Koller, Florian
Publisher: name: Humboldt-Universität zu Berlin
Year: 2020
Subjects: subject: Mobility in Germany 2017
subject: CO2 emissions
subject: Passenger transport
subject: Carbon tax
subject: Distributional effects
subject: Transport policy
subject: 388 Verkehr

description: Background The introduction of a carbon tax on passenger transport is currently being discussed in Germany. Various stakeholders favour a consumption-based, revenue-neutral carbon tax with a uniform lump-sum offset for private households and a tax rate of 40 € per ton of CO2. Objective In this study, we examine the distributional effects of carbon taxation for the German passenger transport sector under the assumption of the proposed tax model. We discuss as to what extent which socioeconomic groups would be burdened and who might even benefit from carbon taxation. To answer these questions we use a uniquely modelled data set that encompasses all forms of passenger transport (i.e. in Germany and abroad) of the German resident population over 1 year. The national household travel survey Mobility in Germany 2017 is the basis of the microscopic data set. We derive annual CO2 emissions and carbon tax burdens for various population groups using the data on passenger transport, as well as specific emission factors. Results Results show that low income households, retirees, single parents and family households with two or more children would benefit from the proposed carbon taxation scheme due to below-average emissions per person; in contrast, working age households without children and car owners with heavy car use would be burdened. Our results are of particular relevance to transport researchers, transport politicians and decision makers as a basis for designing, developing and introducing a carbon taxation scheme.
Holographic Complexity for Time-Dependent Backgrounds
Creators: name: Momeni, Davood
name: Faizal, Mir
name: Bahamonde, Sebastian
name: Myrzakulov, Ratbay
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we will analyse the holographic complexity for time-dependent asymptotically $AdS$ geometries. We will first use a covariant zero mean curvature slicing of the time-dependent bulk geometries, and then use this co-dimension one spacelike slice of the bulk spacetime to define a co-dimension two minimal surface. The time-dependent holographic complexity will be defined using the volume enclosed by this minimal surface. This time-dependent holographic complexity will reduce to the usual holographic complexity for static geometries. We will analyse the time-dependence as a perturbation of the asymptotically $AdS$ geometries. Thus, we will obtain time-dependent asymptotically $AdS$ geometries, and we will calculate the holographic complexity for such a time-dependent geometries.
description: Accepted for publication in Physics letter B
The age of the young bulge-like population in the stellar system Terzan5: linking the Galactic bulge to the high-z Universe
Creators: name: Ferraro, F. R.
name: Massari, D.
name: Dalessandro, E.
name: Lanzoni, B.
name: Origlia, L.
name: Rich, R. M.
name: Mucciarelli, A.
name: -
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Galactic bulge is dominated by an old, metal rich stellar population. The possible presence and the amount of a young (a few Gyr old) minor component is one of the major issues debated in the literature. Recently, the bulge stellar system Terzan 5 was found to harbor three sub-populations with iron content varying by more than one order of magnitude (from 0.2 up to 2 times the solar value), with chemical abundance patterns strikingly similar to those observed in bulge field stars. Here we report on the detection of two distinct main sequence turn-off points in Terzan 5, providing the age of the two main stellar populations: 12 Gyr for the (dominant) sub-solar component and 4.5 Gyr for the component at super-solar metallicity. This discovery classifies Terzan 5 as a site in the Galactic bulge where multiple bursts of star formation occurred, thus suggesting a quite massive progenitor possibly resembling the giant clumps observed in star forming galaxies at high redshifts. This connection opens a new route of investigation into the formation process and evolution of spheroids and their stellar content.
description: 23 pages. 9 figures, in press on ApJ
title: Proceedings of the 21st International Conference on Virus and other Graft Transmissible Diseases of Fruit Crops : July 5 - 10, 2009, Neustadt, Germany
Creators: name: :None
Publisher: name: Julius Kühn-Inst., Bundesforschungsinst. für Kulturpflanzen
Year: 2010
Subjects: subject: Fruit
subject: Pflanzenkrankheit
subject: Virusinfektion
subject: Obstkrankheit
subject: 630

description: Julius-Kühn-Archiv, vol. 427
A note on a generalization of eigenvector centrality for bipartite graphs and applications
Creators: name: Daugulis, Peteris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 15A18, 90B10

description: Eigenvector centrality is a linear algebra based graph invariant used in various rating systems such as webpage ratings for search engines. A generalization of the eigenvector centrality invariant is defined which is motivated by the need to design rating systems for bipartite graph models of time-sensitive and other processes. The linear algebra connection and some applications are described.
description: Published in Networks: Peteris Daugulis: A note on a generalization of eigenvector centrality for bipartite graphs and applications. Networks 59(2): 261-264 (2012)
Are FRB Wandering Narrow Beams?
Creators: name: Katz, J. I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is generally assumed that the sources of Fast Radio Bursts radiate roughly isotropically, so that the observed low duty cycle of any individual source indicates a similar low duty cycle of its radio-frequency emission. An alternative hypothesis is that the radiative duty cycle is ${\cal O}(1)$, but that the radiation is emitted in a beam with a solid angle comparable to the observed duty cycle, whose direction wanders or sweeps across the sky. This hypothesis relaxes the extreme power demands of isotropically radiating models of FRB at the price of multiplying the number of sources. The constraints on pulsar models are relaxed; rather than being unprecedentedly fast-spinning and highly-magnetized with short spin-down times, their parameters may be closer to those of typical radio pulsars. The nanoshots of Galactic pulsars pose analogous energetic problems that may be resolved if their emission also is beamed, suggesting a relation between these phenomena, despite their vastly different energy scales.
description: 4 pp, 1 fig
Vibrational spectroscopies in liquid water: on temperature and coordination effects in Raman and infrared spectroscopies
Creators: name: Vuilleumier, R.
name: Seitsonen, A. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Water is an ubiquitous liquid that has several exotic and anomalous properties. Despite its apparent simple chemical formula, its capability of forming a dynamic network of hydrogen bonds leads to a rich variety of physics. Here we study the vibrations of water using molecular dynamics simulations, mainly concentrating on the Raman and infrared spectroscopic signatures. We investigate the consequences of the temperature on the vibrational frequencies, and we enter the details of the hydrogen bonding coordination by using restrained simulations in order to gain quantitative insight on the dependence of the frequencies on the neighbouring molecules. Further we consider the differences due to the different methods of solving the electronic structure to evaluate the forces on the ions, and report results on the angular correlations, isotopic mixtures HOD in H$_2$O/D$_2$O and and the dielectric constants in water.
description: 15 pages, 7 figures, 5 tables
An ab initio study of the static, dynamic and electronic properties of some liquid 5d transition metals near melting
Creators: name: González, D. J.
name: González, L. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report a study on the static and dynamic properties of several liquid 5$d$ transition metals at thermodynamic conditions near their respective melting points. This is performed by resorting to ab initio molecular dynamics simulations in the framework of the density functional theory. Results are presented for the static structure factors and pair distribution functions; moreover, the local short range order in the liquid metal is also analized. As for the dynamical properties, both single-particle and collective properties are evaluated. The dynamical structure shows the propagating density fluctuations, and the respective dispersion relation is obtained. Results are also obtained for the longitudinal and transverse current spectral functions along with the associated dispersion of collective excitations. For some metals, we found the existence of two branches of transverse collective excitations in the region around the main peak of the structure factor. Finally, several transport coefficients are also calculated.
description: 20 pages, 19 figures, 5 tables
Predictions of canonical wall bounded turbulent flows via a modified $k-ω$ equation
Creators: name: Chen, Xi
name: Hussain, Fazle
name: She, Zhen-Su
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76F55

description: A major challenge in computation of engineering flows is to derive and improve turbulence models built on turbulence physics. Here, we present a physics-based modified $k-ω$ equation for canonical wall bounded turbulent flows (boundary layer, channel and pipe), predicting both mean velocity profile (MVP) and streamwise mean kinetic energy profile (SMKP) with high accuracy over a wide range of Reynolds number ($Re$). The result builds on a multi-layer quantification of wall flows, which allows a significant modification of the $k-ω$ equation. Three innovations are introduced: First, an adjustment of the Karman constant to 0.45 is set for the overlap region with a logarithmic MVP. Second, a wake parameter models the turbulent transport near the centerline. Third, an anomalous dissipation factor represents the effect of a meso layer in the overlap region. Then, a highly accurate (above 99\%) prediction of MVPs is obtained in Princeton pipes, improving the original model prediction by up to 10\%. Moreover, the entire SMKP, including the newly observed outer peak, is predicted. With a slight change of the wake parameter, the model also yields accurate predictions for channels and boundary layers.
description: 22 pages, 14 figures
ESI: Revealing hidden patterns through chemical intuition and interpretable machine learning: A case study of binary rare-earth intermetallics RX
Creators: name: Gvozdetskyi, Volodymyr
name: Selvaratnam, Balaranjan
name: Oliynyk, Anton O.
name: Mar, Arthur
Publisher: name: figshare
Year: 2022
Subjects: Solid state chemistry

description: Input and outputs for the machine learning and SISSO calculations performed for the project entitled "Revealing hidden patterns in binary rare-earth intermetallics RX through chemical intuition and interpretable machine learning".
 This zip file contains the Jupyter notebook files (and PDF snapshots) used for the ML models and the SISSO calculation files. 1. RX_Classification_final_v2 - Optimization of SVC, RF, and DT models. 2. RX_Data_for_Table_and_SI - Calculation of feature importance and average metrics for SVC, RF, and DT models. 3. SISSO_Regression - SISSO files for the regression to find the y axis expression. 4. SISSO_Classification - SISSO classification for the RX data set. 5. Figure_5_plot_data.csv - predicted class and probabilities by the ML models.
On Szegő's theorem for a nonclassical case
Creators: name: Derevyagin, Maxim
name: Simanek, Brian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C05 (Primary), 30D30, 46C20 (Secondary)

description: In this paper we prove Szegő's Theorem for the case when a finite number of Verblunsky coefficients lie outside the closed unit disk. Although a form of this result was already proved by A.L. Sakhnovich, we use a very different method, which shows that the OPUC machinery can still be applied to deal with such nonclassical cases. The basic tool we use is Khrushchev's formula that in the classical case relates the absolutely continuous part of the measure and the $N$-th iterate of the Schur algorithm. It is noteworthy that Khrushchev's formula makes the proof short and extremely transparent. Also, we discuss Verblunsky's theorem for the case in question.
description: 14 pages
Proportional correlation between heat capacity and thermal expansion of atomic, molecular crystals and carbon nanostructures
Creators: name: Barabashko, M. S.
name: Krivchikov, A. I.
name: Basnukaeva, R.
name: Korolyuk, O. A.
name: Jeżowski, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Correlation between thermal expansions $β(T)$ and heat capacity $C(T)$ of atomic and molecular crystals, amorphous materials with a structural disorder, carbon nanomaterials (fullerite C$_{60}$, bundles SWCNTs of single-walled carbon nanotubes) was analyzed. The influence of the contribution to the coefficient of linear thermal expansion $α_\textrm{Xe}(T)$ of Xe atoms adsorbed on the SWCNTs bundles is considered. The proportional correlation was found between the contribution to the coefficient of linear thermal expansion $α_\textrm{Xe}(T)$ and the normalized to the gas constant heat capacity $C_\textrm{Xe}(T)/R$ of Xe atoms adsorbed on the SWCNTs bundles. The proportional correlation $(β/β^*) \sim (C_\textrm{V}/R)$ with the parameter $β^*$ for the bulk thermal expansion coefficient for cryocrystals is proposed. In the case of atomic crystals such as Xe and Ar, the proportional correlation $(β/β^*) \sim (C_\textrm{V}/R)$ is observed in the temperature range from the lowest experimental to temperatures where $C_\textrm{V}/R \approx 2.3$. The correlation is not observed in the temperatures where $2.3
description: 13 pages, 7 figures, 2 tables
Nearly ferromagnetic metal state in the collapsed tetragonal phase of YFe$_2$(Ge,Si)$_2$
Creators: name: Srpcic, J.
name: Jeglic, P.
name: Felner, I.
name: Lv, Bing
name: Chu, C. W.
name: Arcon, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The surprising discovery of tripling the superconducting critical temperature of KFe$_2$As$_2$ at high pressures issued an intriguing question of how the superconductivity in the collapsed tetragonal phase differs from that in the non-collapsed phases of Fe-based superconductors. Here we report $^{89}$Y nuclear magnetic resonance study of YFe$_2$Ge$_{x}$Si$_{2-x}$ compounds whose electronic structure is similar to that of iron-pnictide collapsed tetragonal phases already at ambient pressure. Fe(Ge,Si) layers show strong ferromagnetic spin fluctuations whereas layers are coupled antiferromagnetically -- both positioning the studied family close to a quantum critical point. Next, localized moments attributed either to Fe interstitial or antisite defects may account for magnetic impurity pair-breaking effects thus explaining the substantial variation of superconductivity among different YFe$_2$Ge$_2$ samples.
description: 5 pages, 4 figures
title: Ginan - Case Study, Australian Institute of Marine Science
Creators: name: A., Riddell
name: C., Marshall
name: L., Ng
name: L., Elneser
name: D., Woodrow
name: A., Riddell
name: R., Ruddick
name: V., Grosjean
name: J., Gioffre
name: J., Smith
name: M., Olsen
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2023
Subjects: subject: Positioning Australia
subject: Ginan
subject: Precise Positioning
subject: Global Navigation Satellite Systems
subject: demonstration project
subject: Navigation and position fixing
subject: Published_External

description: FrontierSI has been engaged by Geoscience Australia (GA) to establish a series of case studies showcasing the benefits of Positioning Australia products and services through demonstrations of precise positioning capability. The Australian Institute of Marine Science (AIMS) was selected as the demonstration partner for this case study, contributing their extensive knowledge of current and future marine technologies and providing a suitably challenging environment for deployment of precise positioning solutions. This project investigates the available options for provision of precise global navigation satellite systems (GNSS) positioning at the AIMS Marine Operations Centre, and explores the suitability, benefits, and challenges of using Positioning Australia products including Ginan for this purpose.
Extended Vicsek fractals: Laplacian spectra and their applications
Creators: name: Dolgushev, Maxim
name: Liu, Hongxiao
name: Zhang, Zhongzhi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Extended Vicsek fractals (EVF) are the structures constructed by introducing linear spacers into traditional Vicsek fractals. Here we study the Laplacian spectra of the EVF. In particularly, the recurrence relations for the Laplacian spectra allow us to obtain an analytic expression for the sum of all inverse nonvanishing Laplacian eigenvalues. This quantity characterizes the large-scale properties, such as the gyration radius of the polymeric structures, or the global mean-first passage time for the random walk processes. Introduction of the linear spacers leads to local heterogeneities, which reveal themselves, for example, in the dynamics of EVF under external forces.
description: Definitive version accepted for publication in Physical Review E
GASS 3505: the prototype of HI-excess, passive galaxies
Creators: name: Gereb, K.
name: Catinella, B.
name: Cortese, L.
name: Bekki, K.
name: Moran, S.
name: Schiminovich, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present our multiwavelength analysis of a prototype \HI-excess galaxy, GASS 3505, selected based on having a large gas content ($M_{\rm HI} = 10^{9.9}$ \msun) compared to its little associated star formation activity ($\sim$0.1 \msun\ yr$^{-1}$) in the GALEX Arecibo SDSS Survey (GASS). Very Large Array (VLA) observations show that the \HI\ in GASS 3505 is distributed in a regularly rotating, extended ($\sim$50 kpc radius) gas ring. In the SDSS optical image GASS 3505 appears as a bulge-dominated galaxy, however deep optical imaging reveals low surface brightness ($\gtrsim25$ mag arcsec$^{-2}$) stellar emission around the central bulge. Direct evidence for accretion is detected in form of an extended ($\sim$60 kpc) stellar stream, showing that GASS 3505 has experienced a minor merger in the recent past. We investigate the possibility that the \HI\ ring in GASS 3505 was accreted in such a merger event using N-body and smoothed particle hydrodynamic (SPH) simulations. The best model that reproduces the general properties (i.e., gas distribution and kinematics, stellar morphology) of the galaxy involves a merger between the central bulge and a gas-rich ($M_{\star}$ = 10$^9$ \msun\ and $M_{\rm HI}$/$M_{\star}$ = 10) disk galaxy. However, small discrepancies in the observed and modeled properties could suggest that other sources of gas have to be involved in the build-up of the gas reservoir. This work is the first step toward a larger program to investigate the physical mechanisms that drive the large scatter in the gas scaling relations of nearby galaxies.
description: Accepted for publication in MNRAS
Applicability of scaling behavior and power laws in the analysis of the magnetocaloric effect in second-order phase transition materials
Creators: name: Romero-Muñiz, Carlos
name: Tamura, Ryo
name: Tanaka, Shu
name: Franco, Victorino
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In recent years, universal scaling has gained renewed attention in the study of magnetocaloric materials. It has been applied to a wide variety of pure elements and compounds, ranging from rare earth-based materials to transition metal alloys, from bulk crystalline samples to nanoparticles. It is therefore necessary to quantify the limits within which the scaling laws would remain applicable for magnetocaloric research. For this purpose, a threefold approach has been followed: a) the magnetocaloric responses of a set of materials with Curie temperatures ranging from 46 to 336 K have been modeled with a mean-field Brillouin model, b) experimental data for Gd has been analyzed, and c) a 3D-Ising model ---which is beyond the mean-field approximation--- has been studied. In this way we can demonstrate that the conclusions extracted in this work are model-independent. It is found that universal scaling remains applicable up to applied fields which provide a magnetic energy to the system up to 8\% of the thermal energy at the Curie temperature. In this range, the predicted deviations from scaling laws remain below the experimental error margin of carefully performed experiments. Therefore, for materials whose Curie temperature is close to room temperature, scaling laws at the Curie temperature would be applicable for the magnetic field range available at conventional magnetism laboratories ($\sim 10$ T), well above the fields which are usually available for magnetocaloric devices.
description: 14 pages, 11 figures
One-dimensional Cutting Stock Problem with Divisible Items
Creators: name: Tanir, Deniz
name: Ugurlu, Onur
name: Guler, Asli
name: Nuriyev, Urfat
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences
subject: 90B99

description: This paper considers the one-dimensional cutting stock problem with divisible items, which is a new problem in the cutting stock literature. The problem exists in steel industries. In the new problem, each item can be divided into smaller pieces, then they can be recombined again by welding. The objective is to minimize both the trim loss and the number of the welds. We present a mathematical model and a dynamic programming based heuristic for the problem. Furthermore, a software, which is based on the proposed heuristic algorithm, is developed to use in MKA company, and its performance is analyzed by solving real-life problems in the steel industry. The computational experiments show the efficiency of the proposed algorithm.
description: 12 pages, 2 figures
title: International European Symposium on Stored Product Protection "Stress on chemical products": May 25 - 26, 2009 in Berlin
Creators: name: :None
Publisher: name: Julius Kühn-Inst., Bundesforschungsinst. für Kulturpflanzen
Year: 2010
Subjects: subject: food storage pests
subject: food
subject: Vorratsschutz
subject: Vorratsschädling
subject: Vorratsschutzmittel
subject: Begasungsmittel
subject: Biologische Schädlingsbekämpfung
subject: Integrierte Schädlingsbekämpfung
subject: 630

description: Julius-Kühn-Archiv, vol. 429
Introduction to The Self-Security Strategies for Learning Model (3SL Model)- Analytical Approach -
Creators: name: ELKETANI, Samyr
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 520499
subject: Cognitive and computational psychology not elsewhere classified

description: The level of effectiveness of strategic choices, combined with time-saving methods, have become top priorities for educational systems. In light of the Self-Security Strategies for Learning Model (3SL Model), this research examines the metacognitive components and their importance in achieving cognitive security. The widening gap between practical and field education emphasizes the need for securing learners' paths at the thinking and learning levels. This research provides enabling means to address various personality dimensions and improve learning outcomes. It concludes that the learner's awareness of cognitive processes and their presence in the different stages of learning form the basis of methodological competencies. Metacognition refers to a conscious process that refines and secures thought paths, builds future-oriented knowledge, and efficiently updates existing knowledge to meet cognitive, social, and emotional needs in the relationship with oneself, others, and the world.
title: Sentiment de compétence professionnel vis-à-vis de la gestion des phénomènes de violence : recherche exploratoire à l’Institut Sainte-Agnès, à Sion
title: Sentiment de compétence professionnel vis-à-vis de la gestion des phénomènes de violence : recherche exploratoire à l’Institut Sainte-Agnès, à Sion
titleType: AlternativeTitle
Creators: name: De Pietro, Johanna
name: Friedl-Tapparel, Emilie
Publisher: name: Unknown
Year: 0

description: Samuel souhaite colorier un dessin avec des feutres qui ne lui appartiennent pas. Ne pouvant pas être satisfait dans sa demande, Samuel lance ses stylos sur le visage de l’enseignante. Celle-ci lui rappelle que cela est interdit. Il continue et elle menace de le sanctionner. La situation ne s’améliore pas et l’enfant se jette sur l’adulte, l’insulte et l’attrape par les cheveux. Elle doit alors appeler à l’aide et mettre les autres élèves en sécurité. Avec une collègue enseignante, elles arrivent à maîtriser l’enfant en s’asseyant sur lui et en lui tenant les mains. Il met plus d’une heure à se calmer. Comment faire face à ces phénomènes de violence qui nous mettent à mal professionnellement et personnellement ? Pour tenter de répondre à ce questionnement initial, nous avons exploré les concepts théoriques de violence, de crises et de sentiment de compétence. Parallèlement à ce travail, de concert avec notre direction, nous avons décidé d’axer l’année scolaire 2016-2017 sur cette thématique et avons mis sur pied une formation en collaboration avec l’Institut des Droits de l’Enfant. Notre premier questionnaire a pour but d’évaluer la satisfaction des professionnels quant à la formation fournie. De plus, afin de connaître les besoins des professionnels en matière de gestion des phénomènes de violence ainsi que de mesurer leur sentiment de compétence, nous avons construit un questionnaire « état des lieux ». Il en ressort que les phénomènes de violence sont bel et bien présents au sein de notre institut, qu’ils ne sont pas toujours aisés à appréhender, qu’ils semblent être liés au sentiment de compétence et que les professionnels auraient besoin davantage d’outils pour les gérer au mieux. Certaines pistes d’action sont envisagées dans un futur proche, comme la poursuite du processus de formation ou encore l’élaboration d’un groupe de réflexion pour rédiger un protocole.
Developing machine-learned potentials to simultaneously capture the dynamics of excess protons and hydroxide ions in classical and path integral simulations
Creators: name: Atsango, Austin O.
name: Morawietz, Tobias
name: Marsalek, Ondrej
name: Markland, Thomas E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The transport of excess protons and hydroxide ions in water underlies numerous important chemical and biological processes. Accurately simulating the associated transport mechanisms ideally requires utilizing ab initio molecular dynamics simulations to model the bond breaking and formation involved in proton transfer and path-integral simulations to model the nuclear quantum effects relevant to light hydrogen atoms. These requirements result in a prohibitive computational cost, especially at the time and length scales needed to converge proton transport properties. Here, we present machine-learned potentials (MLPs) that can model both excess protons and hydroxide ions at the generalized gradient approximation and hybrid density functional theory levels of accuracy and use them to perform multiple nanoseconds of both classical and path-integral proton defect simulations at a fraction of the cost of the corresponding ab initio simulations. We show that the MLPs are able to reproduce ab initio trends and converge properties such as the diffusion coefficients of both excess protons and hydroxide ions. We use our multi-nanosecond simulations, which allow us to monitor large numbers of proton transfer events, to analyze the role of hypercoordination in the transport mechanism of the hydroxide ion and provide further evidence for the asymmetry in diffusion between excess protons and hydroxide ions.
Duality and helicity: a symplectic viewpoint
Creators: name: Elbistan, M.
name: Duval, C.
name: Horvathy, P. A.
name: Zhang, P. -M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The theorem which says that helicity is the conserved quantity associated with the duality symmetry of the vacuum Maxwell equations is proved by viewing electromagnetism as an infinite dimensional symplectic system. In fact, it is shown that helicity is the moment map of duality acting as an $SO(2)$ group of canonical transformations on the symplectic space of all solutions of the vacuum Maxwell equations.
description: 10 pages, no figures
On the existence of a second branch of transverse collective excitations in liquid metals
Creators: name: Wax, J. -F.
name: Jakse, N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: It was found recently that the liquid dynamics of several metals (Li, Zn, Ni, Fe, Tl, Pb) under pressure is characterized by transverse spectral functions containing an additional high-frequency peak. To rationalize the pressure dependence of the contributions from different propagating processes to transverse spectral functions in liquid metals, ab initio molecular dynamics simulations were performed for two typical liquid metals (Na and Al) in a wide range of pressures. The influence of density/pressure is investigated for Na by considering four pressures ranging from 15 to 147 GPa, while the temperature influence is considered for Al between 600 K in the deep supercooled liquid up to 1700 K well above the melting point at ambient pressure. Both temperature and density dependence of the spectra of collective excitations are analyzed with a focus on the appearance of a second high-frequency mode in the transverse spectra. A correspondence between spectra of transverse collective excitations and the peak positions of the Fourier-spectra of velocity autocorrelation functions (vibrational density of states) is found.
description: 8 pages, 6 figures, 1 table
title: Erarbeitung von Verfahrensbeschreibungen, Zeitbedarf und Anwendungskosten für spezielle Pflanzenschutzmaßnahmen im Ökologischen Landbau : Produktionsverfahren Mais, Kartoffel, Getreide
Creators: name: Delling, Heike
name: Krieger, Alfons-E.
name: Häring, Anna
name: Kühne, Stefan
name: Jacob, Jens
name: Baufeld, Peter
name: Kloepfer, Florian
Publisher: name: Julius Kühn-Inst.
Year: 2008
Subjects: subject: Maisanbau
subject: Biologischer Landbau
subject: Pflanzenschutz
subject: Methode
subject: Zeitaufwand
subject: Kosten
subject: 630

description: Mitteilungen aus dem Julius-Kühn-Institut: JKI-Mitteilungen, vol. 420
The Linguistic Development Process and Mental Delay
Creators: name: Step.Journal, Science
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 520102
subject: Educational psychology
classificationCode: 520302
subject: Clinical psychology

description: Mental delay is a complex mental limitation, surrounded by theoretical and methodological difficulties. The situation of a mentally challenged child is complex, affected by psychological, social, and educational problems. These challenges can lead to integration difficulties in social, educational, and communication domains. Insufficient scientific research further exacerbates the difficulties faced by these children.Our focus is to investigate the relationship between mental delay and linguistic development towards achieving equal opportunities for all. Research in this area can help alleviate the difficulties faced by these children by promoting their linguistic skills, enhancing their sensory and socio-affective perceptions, and fostering their openness towards others and the world. This work will ultimately prepare them for integration into social and civil life, enabling them to enjoy the same rights and freedoms as others, recognized nationally and internationally.
Radial Velocity Data Analysis with Compressed Sensing Techniques
Creators: name: Hara, Nathan C.
name: Boué, Gwenaël
name: Laskar, Jacques
name: Correia, Alexandre C. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: 62G

description: We present a novel approach for analysing radial velocity data that combines two features: all the planets are searched at once and the algorithm is fast. This is achieved by utilizing compressed sensing techniques, which are modified to be compatible with the Gaussian processes framework. The resulting tool can be used like a Lomb-Scargle periodogram and has the same aspect but with much fewer peaks due to aliasing. The method is applied to five systems with published radial velocity data sets: HD 69830, HD 10180, 55 Cnc, GJ 876 and a simulated very active star. The results are fully compatible with previous analysis, though obtained more straightforwardly. We further show that 55 Cnc e and f could have been respectively detected and suspected in early measurements from the Lick observatory and Hobby-Eberly Telescope available in 2004, and that frequencies due to dynamical interactions in GJ 876 can be seen.
description: Accepted for publication in MNRAS
Aspects of the microscopic structure of curcumin solutions with water-dimethylsulfoxide solvent. Molecular dynamics computer simulation study
Creators: name: Patsahan, T.
name: Pizio, O.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We explore some aspects of the microscopic structure of curcumin solutions with water-dimethylsulfoxide solvent of variable composition. Molecular dynamics computer simulations at isobaric-isothermal conditions are used for this purpose. The model consists of the OPLS-UA type model for the enol conformer of curcumin (J. Mol. Liq., 223, 707, 2016), the OPLS model for the dimethylsulfoxide (DMSO) and the SPC/E water model. Radial distributions for the centers of mass of curcumin molecules are evaluated and the corresponding running coordination numbers are analyzed. The disaggregation of curcumin clusters upon increasing the DMSO content in water-DMSO solvent is elucidated. Changes of the distribution of water and DMSO species around curcumin molecules are investigated. A qualitative comparison of our findings with the results of other authors is performed. A possibility to relate predictions of the model with the experimental observations in terms of the so-called critical wateraggregation percentage is discussed.
description: 15 pages, 14 figures
Nuclear neutrino energy spectra in high temperature astrophysical environments
Creators: name: Misch, G. Wendell
name: Fuller, George M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Astrophysical environments that reach temperatures greater than $\sim$ 100 keV can have significant neutrino energy loss via both plasma processes and nuclear weak interactions. We find that nuclear processes likely produce the highest-energy neutrinos. Among the important weak nuclear interactions are both charged current channels (electron capture/emission and positron capture/emission) and neutral current channels (de-excitation of nuclei via neutrino pair emission). We show that in order to make a realistic prediction of the nuclear neutrino spectrum, one must take nuclear structure into account; in some cases, the most important transitions may involve excited states, possibly in both parent and daughter nuclei. We find that the standard technique of producing a neutrino energy spectrum by using a single transition with a Q-value and matrix element chosen to fit published neutrino production rates and energy losses will not accurately capture important spectral features.
description: 11 pages, 17 figures
How should a small country respond to climate change?
Creators: name: Haymet, A. D. J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Responses to the global climate crisis often focus on the largest current emitters of greenhouse gases. However, analysis shows that about a third of emissions come from a collection of small emitters, each contributing one- to two-percent of the total additional CO$_2$ injected into the communal atmosphere. Attempts to hold global warming to less than 1.5\textcelsius~ cannot succeed without also reducing emissions from these small countries.
description: 4 pages, 3 figures