cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First results of an H-alpha based search of classical Be stars in the Perseus Arm and beyond
Creators: name: Raddi, R.
name: Drew, J. E.
name: Fabregat, J.
name: Steeghs, D.
name: Wright, N. J.
name: Sale, S. E.
name: Farnhill, H. J.
name: Barlow, M. J.
name: Greimel, R.
name: Sabin, L.
name: Corradi, R. M. L.
name: Drake, J. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate a region of the Galactic plane, between 120 <= l <= 140 and -1 <= b <= +4, and uncover a population of moderately reddened (E(B-V) \sim 1) classical Be stars within and beyond the Perseus and Outer Arms. 370 candidate emission line stars (13 <= r <= 16) selected from the INT Photometric H-alpha Survey of the Northern Galactic plane (IPHAS) have been followed up spectroscopically. A subset of these, 67 stars with properties consistent with those of classical Be stars, have been observed at sufficient spectral resolution (Delta_lambda \sim 2 - 4 Angstrom) at blue wavelengths to narrow down their spectral types. We determine these to a precision estimated to be +/- 1 sub-type and then we measure reddenings via SED fitting with reference to appropriate model atmospheres. Corrections for contribution to colour excess from circumstellar discs are made using an established scaling to H-alpha emission equivalent width. Spectroscopic parallaxes are obtained after luminosity class has been constrained via estimates of distances to neighbouring A/F stars with similar reddenings. Overwhelmingly, the stars in the sample are confirmed as luminous classical Be stars at heliocentric distances ranging from 2 kpc up to \sim 12 kpc. However, the errors are presently too large to enable the cumulative distribution function with respect to distance to distinguish between models placing the stars exclusively in spiral arms, or in a smooth exponentially-declining distribution.
description: 21 pages, 13 figures. Accepted for publication in MNRAS
Kepler Photometry of Four Radio-Loud AGN in 2010-2012
Creators: name: Wehrle, Ann E.
name: Wiita, Paul J.
name: Unwin, Stephen C.
name: Di Lorenzo, Paolo
name: Revalski, Mitchell
name: Silano, Daniel
name: Sprague, Dan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have used Kepler photometry to characterize variability in four radio-loud active galactic nuclei (three quasars and one object tentatively identified as a Seyfert 1.5 galaxy) on timescales from minutes to months, comparable to the light crossing time of the accretion disk around the central supermassive black hole or the base of the relativistic jet. Kepler's almost continuous observations provide much better temporal coverage than is possible from ground-based observations. We report the first such data analyzed for quasars. We have constructed power spectral densities using 8 Kepler quarters of long-cadence (30-minute) data for three AGN, 6 quarters for one AGN and 2 quarters of short-cadence (1-minute) data for all four AGN. On timescales longer than about 0.2-0.6 day, we find red noise with mean power-law slopes ranging from -1.8 to -1.2, consistent with the variability originating in turbulence either behind a shock or within an accretion disk. Each AGN has a range of red noise slopes which vary slightly by month and quarter of observation. No quasi-periodic oscillations of astrophysical origin were detected. We detected several days-long flares when brightness increased by 3% - 7% in two objects. No flares on timescales of minutes to hours were detected. Our observations imply that the duty cycle for enhanced activity in these radio-loud AGN is small. These well-sampled AGN light curves provide an impetus to develop more detailed models of turbulence in jets and instabilities in accretion disks.
description: Submitted to Astrophysical Journal on 28 February 2013. 26 pages including 4 figures. A high resolution version of Figure 1 is available by emailing Ann Wehrle
Spatiotemporal Electron-Beam Focusing through Parallel Interactions with Shaped Optical Fields
Creators: name: de Abajo, F. Javier García
name: Ropers, Claus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The ability to modulate free electrons with light has emerged as a powerful tool to produce attosecond electron wavepackets. However, research has so far aimed at the manipulation of the longitudinal wave function component, while the transverse degrees of freedom have primarily been utilized for spatial rather than temporal shaping. Here, we show that the coherent superposition of parallel light-electron interactions in separate spatial zones allows for a simultaneous spatial and temporal compression of a convergent electron wave function, enabling the formation of sub-Ångström focal spots of attosecond duration. The proposed approach will facilitate the exploration of previously inaccessible ultrafast atomic-scale phenomena in particular enabling attosecond scanning transmission electron microscopy.
description: 12 pages, 6 figures, 42 references
Binary boson stars: Merger dynamics and formation of rotating remnant stars
Creators: name: Siemonsen, Nils
name: East, William E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Scalar boson stars have attracted attention as simple models for exploring the nonlinear dynamics of a large class of ultra compact and black hole mimicking objects. Here, we study the impact of interactions in the scalar matter making up these stars. In particular, we show the pivotal role the scalar phase and vortex structure play during the late inspiral, merger, and post-merger oscillations of a binary boson star, as well as their impact on the properties of the merger remnant. To that end, we construct constraint satisfying binary boson star initial data and numerically evolve the nonlinear set of Einstein-Klein-Gordon equations. We demonstrate that the scalar interactions can significantly affect the inspiral gravitational wave amplitude and phase, and the length of a potential hypermassive phase shortly after merger. If a black hole is formed after merger, we find its spin angular momentum to be consistent with similar binary black hole and binary neutron star merger remnants. Furthermore, we formulate a mapping that approximately predicts the remnant properties of any given binary boson star merger. Guided by this mapping, we use numerical evolutions to explicitly demonstrate, for the first time, that rotating boson stars can form as remnants from the merger of two non-spinning boson stars. We characterize this new formation mechanism and discuss its robustness. Finally, we comment on the implications for rotating Proca stars.
description: 29 pages, 20 figures; updated to match PRD version
Variations of magnetic bright point properties with longitude and latitude as observed by Hinode/SOT G-band data
Creators: name: Utz, D.
name: Hanslmeier, A.
name: Veronig, A.
name: Kühner, O.
name: Muller, R.
name: Jurčák, J.
name: Lemmerer, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Small-scale magnetic fields can be observed on the Sun in high resolution G-band filtergrams as magnetic bright points (MBPs). We study Hinode/ Solar Optical Telescope (SOT) longitude and latitude scans of the quiet solar surface taken in the G-band in order to characterise the centre-to-limb dependence of MBP properties (size and intensity). We find that the MBP's sizes increase and their intensities decrease from the solar centre towards the limb. The size distribution can be fitted using a log-normal function. The natural logartihm of the mean (parameter μ) of this function follows a second-order polynomial and the generalised standard deviation (parameter σ) follows a fourth-order polynomial or equally well (within statistical errors) a sine function. The brightness decrease of the features is smaller than one would expect from the normal solar centre-to-limb variation; that is to say, the ratio of a MBP's brightness to the mean intensity of the image increases towards the limb. The centre-to-limb variations of the intensities of the MBPs and the quiet-Sun field can be fitted by a second order polynomial. The detailed physical process that results in an increase of a MBP's brightness and size from Sun centre to the limb is not yet understood and has to be studied in more detail in the future.
description: The final publication is available at http://www.springerlink.com
Exploring Social Media for Early Detection of Depression in COVID-19 Patients
Creators: name: Wu, Jiageng
name: Wu, Xian
name: Hua, Yining
name: Lin, Shixu
name: Zheng, Yefeng
name: Yang, Jie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The COVID-19 pandemic has caused substantial damage to global health. Even though three years have passed, the world continues to struggle with the virus. Concerns are growing about the impact of COVID-19 on the mental health of infected individuals, who are more likely to experience depression, which can have long-lasting consequences for both the affected individuals and the world. Detection and intervention at an early stage can reduce the risk of depression in COVID-19 patients. In this paper, we investigated the relationship between COVID-19 infection and depression through social media analysis. Firstly, we managed a dataset of COVID-19 patients that contains information about their social media activity both before and after infection. Secondly,We conducted an extensive analysis of this dataset to investigate the characteristic of COVID-19 patients with a higher risk of depression. Thirdly, we proposed a deep neural network for early prediction of depression risk. This model considers daily mood swings as a psychiatric signal and incorporates textual and emotional characteristics via knowledge distillation. Experimental results demonstrate that our proposed framework outperforms baselines in detecting depression risk, with an AUROC of 0.9317 and an AUPRC of 0.8116. Our model has the potential to enable public health organizations to initiate prompt intervention with high-risk patients
Crystal Structure and Chemistry of Topological Insulators
Creators: name: Cava, R. J.
name: Ji, Huiwen
name: Fuccillo, M. K.
name: Gibson, Q. D.
name: Hor, Y. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological surface states, a new kind of electronic state of matter, have recently been observed on the cleaved surfaces of crystals of a handful of small band gap semiconductors. The underlying chemical factors that enable these states are crystal symmetry, the presence of strong spin orbit coupling, and an inversion of the energies of the bulk electronic states that normally contribute to the valence and conduction bands. The goals of this review are to briefly introduce the physics of topological insulators to a chemical audience and to describe the chemistry, defect chemistry, and crystal structures of the compounds in this emergent field.
description: Submitted to Journal of Materials Chemistry, 47 double spaced pages, 9 figures
Trace element and polysaccharide sorption in a lacustrine biofilm
Creators: name: Morris, Ephraim G
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: Twenty-four elements (Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Ga, K, Li, Mg, Mn, Ni, Pb, Rb, Se, Sr, Ti, U, V, Zn, and Zr) were determined in freshwater biofilms from Lake Mead by inductively coupled plasma mass spectrometry and flame atomic absorption spectrophotometry. The uptake of polysaccharides (as glucose) was determined by ultraviolet/visible spectrophotometry. Taxonomic identification of the biofilm was determined using a stereo and compound microscopes. Major components included the diatoms Cyclotella, Fragilaria, Cymbella, and Amphora. Results for both major cations and trace elements presented for filtered lake water and for particulates filtered from the water suggest that the accumulation of the inorganic fraction of the biofilm is 'masked'; possibly by significant accumulation of the organic fraction. This is evidenced by lower bioaccumulation factors determined during later stages of biofilm development. This masking seems to be less of a factor during the winter and spring seasons. The influence of suspended particulates on the bioaccumulation factor of the metals could be much greater than the influence of dissolved species. This is evidenced by comparing the bioaccumulation factors calculated from data obtained by measuring the elements in particulate matter and filtered lake water from five 1-L field samples. Calcification of the biofilm appears to be microbially influenced and was prevalent during the warmer sampling periods. Accumulations of iron and manganese in the biofilm can be attributed to the presence of photo-reducing bacteria and to low concentrations of these elements in the surrounding water. Such elemental enrichments hint at possible photo-reducing reactions taking place within the biofilm involving iron (Fe (III) {dollar}\to{dollar} Fe (II)) and manganese (manganese oxides {dollar}\to{dollar} Mn (II)).
Geometry of Wachspress surfaces
Creators: name: Irving, Corey
name: Schenck, Hal
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: primary 13D02, secondary 52C35, 14J26, 14C20

description: Let P_d be a convex polygon with d vertices. The associated Wachspress surface W_d is a fundamental object in approximation theory, defined as the image of the rational map w_d from P^2 to P^{d-1}, determined by the Wachspress barycentric coordinates for P_d. We show w_d is a regular map on a blowup X_d of P^2, and if d>4 is given by a very ample divisor on X_d, so has a smooth image W_d. We determine generators for the ideal of W_d, and prove that in graded lex order, the initial ideal of I(W_d) is given by a Stanley-Reisner ideal. As a consequence, we show that the associated surface is arithmetically Cohen-Macaulay, of Castelnuovo-Mumford regularity two, and determine all the graded betti numbers of I(W_d).
description: 24 pages 8 figures
КАМЕННЫЙ ИНВЕНТАРЬ МЕЗОЛИТИЧЕСКОЙ СТОЯНКИ КАТЕНЬКА (ЛЕСОСТЕПНОЕ ПРИИШИМЬЕ)
Creators: name: Скочина С.Н.
Publisher: name: Труды Камской археолого-этнографической экспедиции
Year: 2022
Subjects: мезолит
стоянка Катенька
лесостепное Приишимье
каменный инвентарь
трасологический анализ
Mesolithic site Katenka
forest-steppe Ishim region
stone tools
use wear analysis

description: В данной работе комплексному анализу подвергнут каменный инвентарь мезолитической стоянки Катенька расположенной в лесостепном Приишимье на северо-восточном берегу оз. Мергень. На основе морфологического анализа выделены основные типологические группы изделий из камня, в результате трасологического анализа определены функции орудий, использовавшихся на стоянке.
description: In this work, the stone tools of the Mesolithic Katenka site located in the forest-steppe Ishim region on the northeastern shore of Lake Mergen are subjected to a comprehensive analysis. On the basis of morphological analysis, the main typological groups of stone products were identified; as a result of traceological analysis, the functions of the tools used at the site were determined.
A comparison of humans and machine learning classifiers categorizing emotion from faces with different coverings
Creators: name: Shehu, Harisu Abdullahi
name: Browne, Will N
name: Eisenbarth, Hedwig
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2022
Subjects: subject: 10299 Applied Mathematics not elsewhere classified
subject: FOS: Mathematics
subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: Information Systems

description: No description supplied
She's Not There: virtuality, animation and live music in performance
Creators: name: Moyes, Peter
name: Harvey, Louise
Publisher: name: Griffith University
Year: 2022
Subjects: subject: 190202 Computer Gaming and Animation
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: The She's Not There project utilizes new technologies and techniques in animated filmmaking in contributing to a tradition of animation music relations. A pairing of live musical performance with contemporary animation techniques provides a real-time dynamic to this project and connects back to the theatrical presentations of silent cinema as accompanied by piano or organ.
Patients' perceptions of spiritual needs and the role of nurses to resolve spiritual needs
Creators: name: Nelson, Barbara Ann
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: This study replicated Finney's (1989) study which examined acutely ill hospitalized patients' perceptions of spiritual needs and the nurse's role in assisting them to resolve those needs. The Spiritual Needs of Patients questionnaire (Martin, Burrows, & Pomilio, 1976) was used to assess patients (n = 73) in a southwestern regional hospital. Reliability was reported as Cronbach's alpha at 0.68. Findings supported Finney's study as well as the original study (Martin et al., 1976) and Hoskins (1986). Patients' responses supported the statement that a person who is ill thinks more about his/her relationship to God. The most important spiritual need identified was "knowledge of God's presence," with "sacraments and communion" being identified as the least important. Respondents supported spiritual nursing interventions including nurses asking patients if they wish to see a clergy person, giving spiritual care by being concerned, cheerful, and kind, sitting down and listening, and encouraging a patient to talk about anything that is bothering him/her. A Mann-Whitney U test was performed to determine differences between demographic groups in regard to spiritual care. Only ages 50-69 compared with 70-91 showed any significant difference with a z score of {dollar}-{dollar}2.021, p = 0.04.
Quantum information analysis of quantum phase transitions in a one-dimensional V1-V2 hard-core-boson model
Creators: name: Ren, Jie
name: Xu, Xuefen
name: Gu, Liping
name: Li, Jialiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The entanglement entropy and quantum fidelity in a hard-core-boson model with nearest- and next-nearest-neighbor interactions are studied numerically. By using exact diagonalization and the density matrix renormalization group, the effects of interactions on entanglement entropy and fidelity susceptibility in the model are investigated. We focus our attention on looking for three quantum phase transitions. It is found that the first derivative of the entanglement entropy can indicate all of three phase transitions, while the fidelity susceptibility cannot predict the transition from superfluid to bond-order in a finite-size system.
Influence of School Selection Factors under Different Family Backgrounds Through Social Interpersonal Relationships of Chinese Secondary Vocational Students
Creators: name: Guo, Cheng Zhe
Publisher: name: DR.KEN Institute of Academic Development and Promotion
Year: 2022
Subjects: Influence of School Selection Factors
Different Family Backgrounds
Social Interpersonal Relationships
Chinese Secondary Vocational Students

description: International Journal of Sociologies and Anthropologies Science Reviews, 2, 6, 79-92
Switching-Algebraic Calculation of Banzhaf Voting Indices
Creators: name: Rushdi, Ali Muhammad
name: Rushdi, Muhammad Ali
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper employs switching-algebraic techniques for the calculation of a fundamental index of voting powers, namely, the total Banzhaf power. This calculation involves two distinct operations: (a) Boolean differencing or differentiation, and (b) computation of the weight (the number of true vectors or minterms) of a switching function. Both operations can be considerably simplified and facilitated if the pertinent switching function is symmetric or it is expressed in a disjoint sum-of-products form. We provide a tutorial exposition on how to implement these two operations, with a stress on situations in which partial symmetry is observed among certain subsets of a set of arguments. We introduce novel Boolean-based symmetry-aware techniques for computing the Banzhaf index by way of two prominent voting systems. These are scalar systems involving six variables and nine variables, respectively. The paper is a part of our ongoing effort for transforming the methodologies and concepts of voting systems to the switching-algebraic domain, and subsequently utilizing switching-algebraic tools in the calculation of pertinent quantities in voting theory.
A family portrait: Domestic dynamics in the fiction of Mary Lavin
Creators: name: Montagne, Lisa Lorraine
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: Mary Lavin (1912-1996) was fairly well-known in Ireland during her lifetime; however, there has been relatively little critical attention paid to her, especially in America, throughout her fifty-year career. This study focuses on the domestic dynamics of the family in Lavin's fiction, whose world is influenced by the more harsh realities of early twentieth-century Irish society: the Victorian expectations of traditional gender roles, a rigid social caste system, and, at times, misguided religion. It is the purpose of this study to explore whether Lavin's characters can find happiness and fulfillment by acting according to personal conscience within this closely-prescribed social framework. Lavin's work explores a wide range of human experiences within this framework from both the male and the female perspectives. This study also analyzes several stories for which very little, if any, criticism exists, including "The Cemetery at the Demesne" and "The New Gardener.".
Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films
Creators: name: Rueckert, F. J.
name: Nie, Y. F.
name: Abughayada, C.
name: Sabok-Sayr, S. A.
name: Mohottala, H.
name: Budnick, J. I.
name: Hines, W. A.
name: Dabrowski, B.
name: Wells, B. O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using pulsed laser deposition and a unique fast quenching method, we have prepared SrCoOx epitaxial films on SiTiO3 substrates. As electrochemical oxidation increases the oxygen content from x = 2.75 to 3.0, the films tend to favor the discrete magnetic phases seen in bulk samples for the homologous series SrCoO(3-n/8) (n = 0, 1, 2). Unlike bulk samples, 200nm thick films remain single phase throughout the oxidation cycle. 300 nm films can show two simultaneous phases during deoxidation. These results are attributed to finite thickness effects and imply the formation of ordered regions larger than approximately 300 nm.
description: The following article has been submitted to Applied Physics Letters. After it is published, it will be found at http://apl.aip.org
Interactions between two adjacent convection rolls in turbulent Rayleigh-Benard convection
Creators: name: Brown, Eric
name: Ji, Dandan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Rayleigh-B{é}nard convection experiments were done with two adjacent cubic cells with a partial wall in between to force the generation of two interacting convection rolls. Observed stable states include both counter-rotating and co-rotating states. The stability of each of these states and their dynamics were modeled by stochastic ordinary differential equations of motion in terms of the orientation, amplitude, and mean temperature of each convection roll. The form of the interaction terms is predicted based on an effective turbulent diffusion of temperature between the adjacent rolls. Predictions are made for stable fixed points of the co- and counter-rotating states. This suggests that the same turbulent thermal diffusivity that describes macroscopically averaged heat transport also controls the interactions between neighboring convection rolls. The surprising stability of co-rotating states is due to the temperature difference between the neighboring rolls becoming large enough that the heat flux between the rolls stabilizes the temperature profile of aligned co-rotating states. This temperature difference can be driven by heating the plates of the two cells to different mean temperatures. This shifts the orientations of the rolls of counter-rotating states in opposite directions, and for large temperature differences only co-rotating states are stable Spontaneous switching between co-rotating and counter-rotating states is also observed. Switching to counter-rotating states occurs mainly due to cessation (a significant weakening of a convection roll), which reduces damping on changes in orientation, allowing the orientation to change rapidly due to diffusive fluctuations. Switching to co-rotating states is mainly driven by smaller diffusive fluctuations, which have a positive feedback that destabilizes the counter-rotating state.
description: 28 pages, 17 figures
PlanetPack: a radial-velocity time-series analysis tool facilitating exoplanets detection, characterization, and dynamical simulations
Creators: name: Baluev, Roman V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present PlanetPack, a new software tool that we developed to facilitate and standardize the advanced analysis of radial velocity (RV) data for the goal of exoplanets detection, characterization, and basic dynamical $N$-body simulations. PlanetPack is a command-line interpreter, that can run either in an interactive mode or in a batch mode of automatic script interpretation. Its major abilities include: (i) Advanced RV curve fitting with the proper maximum-likelihood treatment of unknown RV jitter; (ii) User-friendly multi-Keplerian as well as Newtonian $N$-body RV fits; (iii) Use of more efficient maximum-likelihood periodograms that involve the full multi-planet fitting (sometimes called as ``residual'' or ``recursive'' periodograms); (iv) Easily calculatable parametric 2D likelihood function level contours, reflecting the asymptotic confidence regions; (v) Fitting under some useful functional constraints is user-friendly; (vi) Basic tasks of short- and long-term planetary dynamical simulation using a fast Everhart-type integrator based on Gauss--Legendre spacings; (vii) Fitting the data with red noise (auto-correlated errors); (viii) Various analytical and numerical methods for the tasks of determining the statistical significance. It is planned that further functionality may be added to PlanetPack in the future. During the development of this software, a lot of effort was made to improve the calculational speed, especially for CPU-demanding tasks. PlanetPack was written in pure C++ (standard of 1998/2003), and is expected to be compilable and usable on a wide range of platforms.
description: 15 pages; Revised version submitted to Astronomy & Computing; see http://sourceforge.net/projects/planetpack/ for download
Predicting the Early Stages of Solid-State Precipitation in Al-rich Al-Pt Alloys
Creators: name: Su, Shenghan
name: Bourgeois, Laure
name: Medhekar, Nikhil V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The high strength of structural aluminium alloys depends strongly on the controlled precipitation of specific intermetallic phases, whose identity and crystal structure can be difficult to predict. Here, we investigate the Al-Pt system, which shows some similarity to the Al-Cu system as one of their main intermetallic phases, $Al_2Pt$, is nearly isostructural with $θ^{\prime} (Al_2Cu)$, the metastable phase responsible for the high-strength of Al-Cu alloys. However, phases in Al-Pt alloys are complex and have not been studied in detail. Using a combination of density-functional theory (DFT) calculations and classical nucleation theory (CNT) applied to the Al-Pt system, we design a workflow to predict the thermodynamics of solid solution, intermediate phases such as GP zones, stable and metastable precipitates, and their precipitation sequence. This workflow can be applied to an arbitrary binary alloying system. We confirm the known stable phases $Al_4Pt$, $Al_{21}Pt_8$, $Al_2Pt$, $Al_3Pt_2$, $AlPt (α\& β)$, $Al_3Pt_5$, $AlPt_2 (α\& β)$ and $AlPt_3 (α\& β)$. We also reveal the possible existence of two phases of chemical formulae $Al_5Pt$ and $Al_3Pt$. This large number of intermetallic phases is due to the strong bonding between Al and Pt, which also leads to significant favourable Pt solute formation energy in the Al matrix. Our findings are compared with the known precipitation characteristics of the binary Al-Cu and Al-Au systems. We find that the $θ^{\prime}$-like $Al_2Pt$ precipitate phase has a lower coherent interfacial energy than $θ^{\prime}$. Our calculations strongly suggest that $Al_2Pt$ will precipitate first in Al-rich Al-Pt alloys and will form bulk-like interfaces similar to $η(Al_2Au)$ rather than like $θ^{\prime}(Al_2Cu)$.
description: 32 pages, 9 figures in the main text. 12 pages, 7 figures in the supplementary inforamtion
Employing High-temperature-grown SrZrO$_3$ Buffer to Enhance the Electron Mobility in La:BaSnO$_3$-based Heterostructures
Creators: name: Ngabonziza, Prosper
name: Park, Jisung
name: Sigle, Wilfried
name: van Aken, Peter A.
name: Mannhart, Jochen
name: Schlom, Darrell G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a synthetic route to achieve high electron mobility at room temperature in epitaxial La:BaSnO$_3$/SrZrO$_3$ heterostructures prepared on several oxide substrates. Room-temperature mobilities of 157, 145, and 143 cm$^2$V$^{-1}$s$^{-1}$ are achieved for heterostructures grown on DyScO$_3$ (110), MgO (001), and TbScO$_3$ (110) crystalline substrates, respectively. This is realized by first employing pulsed laser deposition to grow at very high temperature the SrZrO$_3$ buffer layer to reduce dislocation density in the active layer, then followed by the epitaxial growth of an overlaying La:BaSnO$_3$ active layer by molecular-beam epitaxy. Structural properties of these heterostructures are investigated, and the extracted upper limit of threading dislocations is well below $1.0\times 10^{10}$cm$^{-2}$ for buffered films on DyScO$_3$, MgO, and TbScO$_3$ substrates. The present results provide a promising route towards achieving high mobility in buffered La:BaSnO$_3$ films prepared on most, if not all, oxide substrates with large compressive or tensile lattice mismatches to the film.
description: 9 pages and 5 Figures in the Maintext. 3 pages and 3 Figures in the Supplementary Information
The effects of an eight-week training program on a population with chronic obstructive pulmonary disease
Creators: name: Lawyer, Tracy Lynn
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: This study was designed to determine the effects of an 8 week training program on muscle strength and cardiovascular fitness in participants affected with chronic obstructive pulmonary disease. Eight participants (ages 64-83) were evaluated before and after the training program on the basis of a modified 3-level step test, biceps curl strength, 6 minute timed walk for distance, and grip strength; Significant improvements were found in biceps curl strength (+12 repetitions, P {dollar}<{dollar}.05), 6 minute walk distance (P {dollar}<{dollar}.05), and in both stepping time and heart rate at each level in the modified step test (P {dollar}<{dollar}.05). No significant improvement was found in grip strength. These results suggest that a program of strengthening and conditioning exercises improves upper body strength and exercise tolerance in participants with COPD, which may have implications for performance of activities of daily living.
title: Friedrich Garscha: Die Alamannen in Südbaden. Katalog der Grabfunde. Germanische Denkmäler der Völkerwanderungszeit, Serie A, Band XL. Berlin 1970
Creators: name: Christlein, Rainer
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Friedrich Garscha: Die Alamannen in Südbaden. Katalog der Grabfunde. Germanische Denkmäler der Völkerwanderungszeit, Serie A, Band XL. Verlag Walter de Gruyter u. Co, Berlin 1970. Textband VIII/308 Seiten, 20 Abbildungen, 2 Beilagen, Tafelband 15 Typentafeln und 116 Tafeln.
The UV and X-ray activity of the M dwarfs within 10pc of the Sun
Creators: name: Stelzer, B.
name: Marino, A.
name: Micela, G.
name: Lopez-Santiago, J.
name: Liefke, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We systematically study the X-ray and ultraviolet emission of a subsample of M dwarfs from a recent proper-motion survey, selecting all M dwarfs within 10pc to obtain a nearly volume-limited sample (~90% completeness). Archival ROSAT, XMM-Newton and GALEX data are combined with published spectroscopic studies of Halpha emission and rotation to obtain a broad picture of stellar activity on M dwarfs. We make use of synthetic model spectra to determine the relative contributions of photospheric and chromospheric emission to the ultraviolet flux. We also analyse the same diagnostics for a comparison sample of young M dwarfs in the TWHya association (~10Myrs). We find that generally the emission in the GALEX bands is dominated by the chromosphere but the photospheric component is not negligible in early-M field dwarfs. The surface fluxes for the Halpha, near-ultraviolet, far-ultraviolet and X-ray emission are connected via a power law dependence. We present here for the first time such flux-flux relations involving broad-band ultraviolet emission for M dwarfs. For given spectral type the activity indices, defined as flux ratio between the activity diagnostic and the bolometric flux of the star, display a spread of 2-3 dex which is largest for M4 stars. The mean activity index for fast rotators, likely representing the saturation level, decreases from X-rays over the FUV to the NUV band and Halpha, i.e. the fractional radiation output increases with atmospheric height. The comparison to the ultraviolet and X-ray properties of TWHya members shows a drop of nearly three orders of magnitude for the luminosity in these bands between ~10Myr and few Gyrs age. A few young field dwarfs (< 1Gyr) in the 10pc sample bridge the gap indicating that the drop in magnetic activity with age is a continuous process. The slope of the age decay is steeper for the X-ray than for the UV luminosity.
description: Accepted for publication in MNRAS (19 pages)
Sublimation from snow packs in Toiyabe National Forest, Nevada and Dixie National Forest, Utah
Creators: name: Lawson, Stephen M
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: A study was conducted to measure sublimation rates and concurrent meteorological parameters on snow packs at Kyle Canyon, Nevada; Brian Head, Utah; and Lee Canyon, Nevada. Over 730 individual gravimetric measurements were made using snow lysimeters and over 16,500 individual meteorological measurements were taken. The measured sublimation rates averaged 0.438 mm/day, 0.757 mm/day, and 0.586 mm/day for each site respectively, with a combined average of 0.647 mm/day for all sites. There was little or no correlation between measured sublimation rates and meteorological measurements with the exception of Kyle Canyon. However, the data set from Kyle Canyon was the most limited of the sites and may have produced spurious correlations. The Thornthwaite and Holzman equation was used to calculate sublimation values for each site, predicting average sublimation rates that were less than half of the measured values. The calculated sublimation rate averaged 0.281 mm/day for all sites and, excepting Kyle Canyon data, correlated poorly with measured values. Calculated sublimation rates from an empirical equation proposed by Avery et al. (1992) were correlated with the averaged measured rates at eleven field sites including the three sites in this study, giving a correlation value of 0.775. The measured sublimation rates from this study were within the range of sublimation rates observed by other researchers. Sublimation was shown to be responsible for a significant amount of water-equivalent loss from snow packs.
Two optimization techniques for designing multiplierless Fir filters
Creators: name: Lawton, Torrance Matthew
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: This thesis introduces two optimal design techniques for discrete time finite impulse response (FIR) multiplierless filters with constant group delay. The first technique minimizes a weighted least squared optimality criteria. The second technique minimizes a weighted least squared optimality criteria subject to user specified frequency constraints. Examples are included of transport processor applications and finite wordlength coefficient applications.
Cell-sized confinements alter molecular diffusion in concentrated polymer solutions due to length-dependent wetting of polymers
Creators: name: Kanakubo, Yuki
name: Watanabe, Chiho
name: Yamamoto, Johtaro
name: Yanagisawa, Naoya
name: Nikoubashman, Arash
name: Yanagisawa, Miho
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Living cells are characterized by the micrometric confinement of various macromolecules at high concentrations. Using droplets containing binary polymer blends as artificial cells, we previously showed that cell-sized confinement causes phase separation of the binary polymer solutions because of the length-dependent wetting of the polymers. Here we demonstrate that the wetting-induced heterogeneity of polymers also emerges in single-component polymer solutions. The resulting heterogeneity leads to a slower transport of small molecules at the center of cell-sized droplets than that in bulk solutions. This heterogeneous distribution is observed when longer polymers with lower wettability are localized at the droplet center. Molecular simulations support this wetting-induced heterogeneous distribution by polymer length. Our results suggest that cell-sized confinement functions as a structural regulator for polydisperse polymer solutions that specifically manipulate the diffusion of molecules, particularly those with sizes close to the correlation length of the polymer chains.
Multi-Objective AI Planning: Comparing Aggregation and Pareto Approaches
Creators: name: Khouadjia, Mostepha Redouane
name: Schoenauer, Marc
name: Vidal, Vincent
name: Dréo, Johann
name: Savéant, Pierre
Publisher: name: arXiv
Year: 2013
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Most real-world Planning problems are multi-objective, trying to minimize both the makespan of the solution plan, and some cost of the actions involved in the plan. But most, if not all existing approaches are based on single-objective planners, and use an aggregation of the objectives to remain in the single-objective context. Divide and Evolve (DaE) is an evolutionary planner that won the temporal deterministic satisficing track at the last International Planning Competitions (IPC). Like all Evolutionary Algorithms (EA), it can easily be turned into a Pareto-based Multi-Objective EA. It is however important to validate the resulting algorithm by comparing it with the aggregation approach: this is the goal of this paper. The comparative experiments on a recently proposed benchmark set that are reported here demonstrate the usefulness of going Pareto-based in AI Planning.
Strain Engineering of Photo-induced Topological Phases in 2D Ferromagnets
Creators: name: Antão, T. V. C.
name: Peres, N. M. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We argue that strain engineering is a powerful tool which may facilitate the experimental realization and control of topological phases in laser-driven 2D ferromagnetic systems. To this extent, we show that by applying a circularly polarized laser field to a 2D honeycomb ferromagnet which is uniaxially strained in either the zig-zag or armchair direction, it is possible to generate a synthetic Dzyaloshinskii-Moriya interaction (DMI) tunable by the intensity of the applied electric field, as well as by the magnitude of applied strain. Such deformations enable transitions to phases with opposite sign of Chern number, or to trivial phases. These are basic results that could pave the way for the development of a new field of Strain Engineered Topological Spintronics (SETS).
description: 11 pages; enlarged version relatively to version V1; Accepted for publication in Physical Review B
Erinnerungen an Heinrich Brauner (1928--1990)
Creators: name: Havlicek, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 01A70

description: Recollections of the Austrian geometer Heinrich Brauner (in German).
Statistics of carrier-cargo complexes
Creators: name: Wittmann, René
name: Monderkamp, Paul A.
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We explore the statistics of assembling soft-matter building blocks to investigate the uptake and encapsulation of cargo particles by carriers engulfing their load. While the such carrier-cargo complexes are important for many applications out of equilibrium, such as drug delivery and synthetic cell encapsulation, we uncover here the basic statistical physics in minimal hard-core-like models for particle uptake. Introducing an exactly solvable equilibrium model in one dimension, we demonstrate that the formation of carrier-cargo complexes can be largely tuned by both the cargo concentration and the carriers' interior size. These findings are intuitively explained by interpreting the internal free space (partition function) of the cargo inside a carrier as its engulfment strength, which can be mapped to an external control parameter (chemical potential) of an additional effective particle species. Assuming a hard carrier membrane, such a mapping can be exactly applied to account for multiple cargo uptake involving various carrier or cargo species and even attractive uptake mechanisms, while soft interactions require certain approximations. We further argue that the Boltzmann occupation law identified within our approach is broken when particle uptake is governed by non-equilibrium forces. Speculating on alternative occupation laws using effective parameters, we put forward a Bose-Einstein-like phase transition associated with polydisperse carrier properties.
description: 20 pages, 8 figures
Antisite arsenic incorporation in the low-temperature molecular beam epitaxy of gallium arsenide
Creators: name: Muthuvenkatraman, Sivakumar
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: A stochastic model for simulating the growth processes during the low temperature molecular beam epitaxy of gallium arsenide is developed. The model includes the presence and dynamics of a weakly bound physisorbed state for arsenic. Three different kinetic models with a combination of surface kinetic processes such as incorporation of antisite arsenic, evaporation of antisite arsenic and incorporation of regular arsenic, were considered. The kinetic model which includes all three surface processes was the best model. The activation energy of 1.16eV for the evaporation of antisite arsenic from our model is in good agreement with theoretical estimates. At constant substrate temperature and growth rate, antisite arsenic concentration increases with arsenic flux for low fluxes and saturates for high fluxes. The critical arsenic flux at which the {dollar}As\sb{Ga}{dollar} concentration saturates increases with temperature and the {dollar}As\sb{Ga}{dollar} concentration saturates at lower values for higher temperatures. As the arsenic flux increases, the coverage of the physisorbed layer increases and at a critical flux the coverage saturates at its maximum value of unity and hence the concentration of {dollar}As\sb{Ga}{dollar} saturates. Lower {dollar}As\sb{Ga}{dollar} concentration results at higher temperature due to increased evaporation of {dollar}As\sb{Ga}.{dollar} The model predicted the existence of a critical temperature at which the maximum {dollar}As\sb{Ga}{dollar} concentration can be obtained. The experimental results confirmed the existence of this critical temperature. At a fixed value of arsenic flux the {dollar}As\sb{Ga}{dollar} concentration increases with decreasing temperature, to a critical temperature, and then decreases with further decrease in temperature. The critical temperature of 473{dollar}\sp\circ K{dollar} obtained from our model is in agreement with the experimental value. Above the critical temperature, evaporation kinetics dominates the surface processes, whereas below the critical temperature, the incorporation kinetics dominates. The {dollar}As\sb{Ga}{dollar} concentration increases with growth rate for low arsenic flux and decreases with growth rate for higher values. (Abstract shortened by UMI.).