cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Stellar Disk of M81
Creators: name: Davidge, T. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Wide-field images obtained with the 3.6 meter Canada-France-Hawaii Telescope are used to investigate the spatial distribution and photometric properties of the brightest stars in the disk of M81 (NGC 3031). With the exception of the central regions of the galaxy and gaps between CCDs, the survey is spatially complete for stars with i' < 24 and major axis distances of 18 kpc. A more modest near-infrared survey detects stars with K < 20 over roughly one third of the disk. Bright main sequence (MS) stars and RSGs are traced out to galactocentric distances of at least 18 kpc. The spatial distribution of bright MS stars tracks emission at far-ultraviolet, mid- and far-infrared wavelengths, although tidal features contain bright MS stars but have little or no infrared flux. The specific frequency of bright MS stars and RSGs, normalized to K-band integrated brightness, increases with radius, indicating that during the past 30 Myr the specific star formation rate (SSFR) has increased with increasing radius. The stellar content of the M81 disk undergoes a distinct change near R ~ 14 kpc, and the luminosity-weighted mean age decreases with increasing radius in the outer regions of the M81 disk.
description: Accepted for puplication in the ApJ
A glance beyond the quantum model
Creators: name: Navascues, Miguel
name: Wunderlich, Harald
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One of the most important problems in Physics is how to reconcile Quantum Mechanics with General Relativity. Some authors have suggested that this may be realized at the expense of having to drop the quantum formalism in favor of a more general theory. However, as the experiments we can perform nowadays are far away from the range of energies where we may expect to observe non-quantum effects, it is difficult to theorize at this respect. Here we propose a fundamental axiom that we believe any reasonable post-quantum theory should satisfy, namely, that such a theory should recover classical physics in the macroscopic limit. We use this principle, together with the impossibility of instantaneous communication, to characterize the set of correlations that can arise between two distant observers. Although several quantum limits are recovered, our results suggest that quantum mechanics could be falsified by a Bell-type experiment if both observers have a sufficient number of detectors.
MIMO Cluster Cooperative Assignment Cross Layer Scheme for Hybrid Wireless Sensor Networks
Creators: name: Zhong, Yingji
name: Kwak, Kyung Sup
name: Ullah, Sana
Publisher: name: arXiv
Year: 2009
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The dual-cross scenario of the hybrid wireless sensor networks (WSNs) is studied and a novel MIMO Cluster Cooperative Assignment Cross Layer Scheduling Scheme (MCCA-CLSS) is proposed in this paper. The comparison and the predominance of the proposed scheme are demonstrated, the clusters are optimized. With the help of the simulations, the relative energy consumption and the end-to-end blocking probability are all improved. The addressing ratio of success in the condition of the unchanged parameters and external information can be increased and the network can tolerate more hops to support reliable transportation by the proposed scheme.
description: 4 figures, 9th International Symposium on Communication and Information Technology 2009 (ISCIT 2009), September 28-30, 2009, South Korea
Faith in the Algorithm, Part 2: Computational Eudaemonics
Creators: name: Rodriguez, Marko A.
name: Watkins, Jennifer H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: K.4.1; H.1.2; H.3

description: Eudaemonics is the study of the nature, causes, and conditions of human well-being. According to the ethical theory of eudaemonia, reaping satisfaction and fulfillment from life is not only a desirable end, but a moral responsibility. However, in modern society, many individuals struggle to meet this responsibility. Computational mechanisms could better enable individuals to achieve eudaemonia by yielding practical real-world systems that embody algorithms that promote human flourishing. This article presents eudaemonic systems as the evolutionary goal of the present day recommender system.
Supplementary document for Frequency tuning behaviour of terahertz quantum cascade lasers revealed by a laser beating scheme - 5271641.pdf
Creators: name: Guan, Wen
name: Liao, Xiaoyu
name: Li, Ziping
name: Wan, Wenjian
name: Zhou, Kang
name: Zhao, Yiran
name: Wang, Chenjie
name: ma, xuhong
name: Wang, Shumin
name: Cao, Juncheng
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Lasers and Quantum Electronics

description: Supplemental Document
On a theorem of Mestre and Schoof
Creators: name: Cremona, John E.
name: Sutherland, Andrew V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G20

description: A well known theorem of Mestre and Schoof implies that the order of an elliptic curve E over a prime field F_q can be uniquely determined by computing the orders of a few points on E and its quadratic twist, provided that q > 229. We extend this result to all finite fields with q > 49, and all prime fields with q > 29.
description: 6 pages, to appear in Journal de Th\'eorie des Nombres de Bordeaux
Constructive counterexamples to additivity of minimum output Rényi entropy of quantum channels for all p>2
Creators: name: Grudka, Andrzej
name: Horodecki, Michał
name: Pankowski, Łukasz
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present a constructive example of violation of additivity of minimum output Rényi entropy for each p>2. The example is provided by antisymmetric subspace of a suitable dimension. We discuss possibility of extension of the result to go beyond p>2 and obtain additivity for p=0 for a class of entanglement breaking channels.
description: 4 pages; a reference added
Electromagnetic Vacuum of Complex Media: Dipole Emission vs. Light Propagation, Vacuum Energy, and Local Field Factors
Creators: name: Donaire, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We offer a unified approach to several phenomena related to the electromagnetic vacuum of a complex medium made of point electric dipoles. To this aim, we apply the linear response theory to the computation of the polarization field propagator and study the spectrum of vacuum fluctuations. The physical distinction among the local density of states which enter the spectra of light propagation, total dipole emission, coherent emission, total vacuum energy and Schwinger-bulk energy is made clear. Analytical expressions for the spectrum of dipole emission and for the vacuum energy are derived. Their respective relations with the spectrum of external light and with the Schwinger-bulk energy are found. The light spectrum and the Schwinger-bulk energy are determined by the Dyson propagator. The emission spectrum and the total vacuum energy are determined by the polarization propagator. An exact relationship of proportionality between both propagators is found in terms of local field factors. A study of the nature of stimulated emission from a single dipole is carried out. Regarding coherent emission, it contains two components. A direct one which is transferred radiatively and directly from the emitter into the medium and whose spectrum is that of external light. And an indirect one which is radiated by induced dipoles. The induction is mediated by one (and only one) local field factor. Regarding the vacuum energy, we find that in addition to the Schwinger-bulk energy the vacuum energy of an effective medium contains local field contributions proportional to the resonant frequency and to the spectral line-width.
description: Typos fixed, journal ref. added
Some interrelations of photosynthesis and photorespiration among species
Creators: name: Downton, William John Sherwin
Publisher: name: University of British Columbia
Year: 2011

description: Photosynthesis, photorespiration and differences in their interactions among species were studied. In the first of two parts of the investigation, the CO₂ compensation concentration of members of the Gramineae and other plants was determined with an infrared CO₂ analyzer. In some cases the Initial products of ¹⁴C0₂ fixation and leaf anatomy were also examined. In plants with low compensation values (lacking photo-respiration) the initial products of photosynthesis were formed by the C₄-dlcarboxylic acid pathway. High compensation plants (with photorespiration) produced compounds typical of the Calvin cycle. The leaf veins of low compensation species were surrounded by a specialized parenchyma bundle sheath containing a high concentration of chloroplasts with large quantities of starch. Low compensation members of the Gramineae belonged to the arlstidoid, chloridoid-eragrostoid and panicoid lines of evolution. Of the genera confined to these phylogenetic lines, Panlcum was found to differ in photosynthetlc physiology and bundle sheath characteristics at the subgeneric level. This type of photosynthetlc diversity also occurred within Cyperus (Cyperaceae), Atriplex and Bassia (Chenopodiaceae). Despite these differences, the correlation between type of photosynthetlc pathway, compensation value and leaf anatomy was consistent. The literature indicates that low compensation grasses have photosynthetic rates that are about double those of plants with photorespiration correlated with a temperature optimum for photosynthesis of about 35°. Species with photorespiration have optima within the range 10-25°. Some simple assay procedures proposed on the basis of these correlations allow rapid determination of the physiological and biochemical status of plants with respect to photosynthesis. In the second part of the investigation, some published studies of photorespiration and glycolate oxidation were reexamined and correlated by infrared CO₂ analysis. Photosynthetic rate data at different O₂ tensions for wheat, oat and corn seedlings fed 3-(3,4-dichlorophenyl)-l, 1 dimethyl urea (DCMU) indicated that dark respiration continued in the light when photosynthesis was completely inhibited. Photorespiration was also inhibited. The O₂ sensitivity of glycolate-stimulated CO₂ production was found to be compatible with the proposal that glycolate is a substrate of photorespiration. Both 'in vivo' and 'in vitro' studies of the alga Nitella flexilis revealed a pathway of glycolate oxidation resembling that of higher plants. DCMU inhibition of photosynthesis by Nitella gave results similar to those for the monocotyledons tested. Under very low light intensity, CO₂ compensation in corn was measurable but was not sensitive to high O₂ concentration. It appears that the lack of photorespiration in this plant is not the end result of efficient internal recycling of CO₂ to photosynthesis.
A LABOCA survey of the Extended Chandra Deep Field South - submillimeter properties of near-IR selected galaxies
Creators: name: Greve, T. R.
name: Weiss, A.
name: Walter, F.
name: Smail, I.
name: Zheng, X. Z.
name: Knudsen, K. K.
name: Coppin, K. E. K.
name: Kovacs, A.
name: Bell, E. F.
name: de Breuck, C.
name: Dannerbauer, H.
name: Dickinson, M.
name: Gawiser, E.
name: Lutz, D.
name: Rix, H. -W.
name: Schinnerer, E.
name: Alexander, D.
name: Bertoldi, F.
name: Brandt, W. N.
name: Chapman, S. C.
name: Ivison, R. J.
name: Koekemoer, A. M.
name: Kreysa, E.
name: Kurczynski, P.
name: Menten, K.
name: Siringo, G.
name: Swinbank, M.
name: van der Werf, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the 330hr ESO-MPG 870-micron survey of the Extended Chandra Deep Field South (ECDF-S) obtained with the Large Apex BOlometer CAmera (LABOCA) on the Atacama Pathfinder EXperiment (APEX), we have carried out a stacking analysis at submillimeter (submm) wavelengths of a sample of 8266 near-infra-red (near-IR) selected (K_vega <= 20) galaxies, including 893 BzK galaxies, 1253 extremely red objects (EROs) and 737 distant red galaxies (DRGs), selected from the Multi-wavelength Survey by Yale-Chile (MUSYC). We measure average 870-micron fluxes of 0.20+-0.01mJy (20.0sigma), 0.45+-0.04mJy (11.3sigma), 0.42+-0.03mJy (14.0sigma), and 0.41+-0.04mJy (10.3sigma) for the K_vega <= 20, BzK, ERO and DRG samples, respectively. For the BzK, ERO and DRG subsamples, which overlap to some degree and are like to be at z ~ 1-2, this implies an average far-IR luminosity of ~2-6x10^{11} Lsolar and star formation rate of ~40-100Msolar. Splitting the BzK galaxies up into star-forming (sBzK) and passive (pBzK) galaxies, the former is significantly detected (0.48+-0.04mJy, 12.0sigma) while the latter is only marginally detected (0.27+-0.10mJy, 2.7sigma), thus confirming that the sBzK/pBzK criteria do isolate obscured, star forming and truly passive galaxies. The K_vega <= 20 galaxies are found to contribute with 6.6+-0.3Jy deg^{-2} (~15%) to the 870-micron extragalactic background light (EBL). sBzK and pBzK galaxies contribute 1.7+-0.2Jy deg^{-2} (~4%) and 0.2+-0.1 Jy deg^{-2} (< 0.5%) to the EBL. [Abridged]
description: (21 pages, 11 figures, submitted to ApJ)
A dip in the past: the star formation history of young associations narrated by kinematics
Creators: name: Squicciarini, Vito
Publisher: name: Zenodo
Year: 2021
Subjects: associations
gaia
Upper Scorpius
kinematics

description: Stellar associations can be discerned as overdensities of sources not only in the physical space but also, more importantly, in the velocity space. The common motion of their members, gradually eroded by the galactic tidal field, is partially reminiscent of the initial kinematic structure. Using recent data from Gaia EDR3, combined with radial velocities from GALAH and APOGEE, we traced back the present positions of stars belonging to the Scorpius-Centaurus association. A significant part of these stars (the "clustered" population) appears composed of many smaller entities, which were in a more compact configuration in the past. The presence of a kinematic duality is reflected into an age spread between this younger clustered population and an older diffuse population, in turn confirmed by a different fraction of disc-bearing stars. Star formation in the region appears to have lasted more than 10 Myr and to have proceeded in small groups that, after a few Myr, dissolve in the field of the older population but retain for some time memory of their initial structure. The consequences of our results will be discussed here, and a comparison with stellar ages inferred through isochrone fitting will shed light on the timescale of gas removal.
Local polynomial regression for pooled response data
Creators: name: Wang, Dewei
name: Mou, Xichen
name: Li, Xiang
name: Huang, Xianzheng
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: We propose local polynomial estimators for the conditional mean of a continuous response when only pooled response data are collected under different pooling designs. Asymptotic properties of these estimators are investigated and compared. Extensive simulation studies are carried out to compare finite sample performance of the proposed estimators under various model settings and pooling strategies. We apply the proposed local polynomial regression methods to two real-life applications to illustrate practical implementation and performance of the estimators for the mean function.
STRUCTURAL-SEMANTIC FEATURES OF LEXICAL UNITS RELATED TO INTERNATIONAL LAW IN ENGLISH AND UZBEK
Creators: name: Isanova, F.
Publisher: name: Zenodo
Year: 2023

description: The article is devoted to the analysis of different models of terminological units in the language of international law and is based on the texts of 20 internationally recognized documents – International Labour Organization conventions. Due to the fact that conventions apply to different areas of international employment law, the terminology is thematically diverse. The authors distinguish three main types of terms depending on the number of components. Legal terminology is characterized by a certain semantic structure which is of great importance in conveying the meaning of the term. Special attention is given to the ways of legal terminology formation. Though legal English is rather conservative, it allows certain transformations by means of extension of meaning and at the expense of related fields of knowledge.
A New Mechanism for Radial Migration in Galactic Disks: Spiral-Bar Resonance Overlap
Creators: name: Minchev, I.
name: Famaey, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: While it has long been known that a large number of short-lived transient spirals can cause stellar migration, here we report that another mechanism is also effective at mixing disks of barred galaxies. The resonance overlap of the bar and spiral structure induces a nonlinear response leading to a strong redistribution of angular momentum in the disk. We find that, depending on the amplitudes of the perturbers, the changes in angular momentum, dL, could occur up to an order of magnitude faster than in the case of recurrent spirals. The signature of this mechanism is a bimodality in dL with maxima near the bar's corotation and its outer Lindblad resonance; this is independent of the properties of the spiral structure. For parameters consistent with the Milky Way the disk mixes in about 3 Gyr and the stellar velocity dispersion increases with time in a manner roughly consistent with observations. This new mechanism could account for both the observed age-velocity relation and the absence of age-metallicity relation in the solar neighborhood. Spiral-bar interaction could also explain observations showing that strongly barred galaxies have weaker metallicity gradients than weakly barred or non-barred galaxies.
description: 10 pages, 7 figures. Substantially expanded. Main results remain the same. Accepted for publication in ApJ
The gluon spin contribution to the proton spin from the double helicity asymmetry in inclusive pi^0 production in polarized p+p collisions at sqrt(s)=200 GeV
Creators: name: PHENIX Collaboration
name: Adare, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The double helicity asymmetry in neutral pion production for p_T = 1 to 12 GeV/c has been measured with the PHENIX experiment in order to access the gluon spin contribution, Delta-G, to the proton spin. Measured asymmetries are consistent with zero, and at a theory scale of μ^2 = 4 GeV^2 give Delta-G^[0.02,0.3] = 0.1 to 0.2, with a constraint of -0.7 < Delta-G^[0.02,0.3] < 0.5 at Delta-chi^2 = 9 (~3 sigma) for our sampled gluon momentum fraction (x) range, 0.02 to 0.3. The results are obtained using predictions for our measured asymmetries generated from four representative fits to polarized deep inelastic scattering data. We also consider the dependence of the Delta-G constraint on the choice of theoretical scale, a dominant uncertainty in these predictions.
description: 386 authors from 63 institutions, 6 pages, 4 figures, 1 table. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
The Effect of a Time-Varying Accretion Disk Size on Quasar Microlensing Light Curves
Creators: name: Blackburne, Jeffrey A.
name: Kochanek, Christopher S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Microlensing perturbations to the magnification of gravitationally lensed quasar images are dependent on the angular size of the quasar. If quasar variability at visible wavelengths is caused by a change in the area of the accretion disk, it will affect the microlensing magnification. We derive the expected signal, assuming that the luminosity scales with some power of the disk area, and estimate its amplitude using simulations. We discuss the prospects for detecting the effect in real-world data and for using it to estimate the logarithmic slope of the luminosity's dependence on disk area. Such an estimate would provide a direct test of the standard thin accretion disk model. We tried fitting six seasons of the light curves of the lensed quasar HE 0435-1223 including this effect as a modification to the Kochanek et al. (2006) approach to estimating time delays. We find a dramatic improvement in the goodness of fit and relatively plausible parameters, but a robust estimate will require a full numerical calculation in order to correctly model the strong correlations between the structure of the microlensing magnification patterns and the magnitude of the effect. We also comment briefly on the effect of this phenomenon for the stability of time delay estimates.
description: 6 pages, 5 figures. Modified slightly to match published version
Sets Characterized by Missing Sums and Differences
Creators: name: Zhao, Yufei
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11B05, 11B13, 11B75, 11P99

description: A more sums than differences (MSTD) set is a finite subset S of the integers such |S+S| > |S-S|. We show that the probability that a uniform random subset of {0, 1, ..., n} is an MSTD set approaches some limit rho > 4.28 x 10^{-4}. This improves the previous result of Martin and O'Bryant that there is a lower limit of at least 2 x 10^{-7}. Monte Carlo experiments suggest that rho \approx 4.5 \x 10^{-4}. We present a deterministic algorithm that can compute rho up to arbitrary precision. We also describe the structure of a random MSTD subset S of {0, 1, ..., n}. We formalize the intuition that fringe elements are most significant, while middle elements are nearly unrestricted. For instance, the probability that any ``middle'' element is in S approaches 1/2 as n -> infinity, confirming a conjecture of Miller, Orosz, and Scheinerman. In general, our results work for any specification on the number of missing sums and the number of missing differences of S, with MSTD sets being a special case.
description: 32 pages, 1 figure, 1 table
Working Open: gdoc Template. Companion material for Schley, Duckles & Blili-Hamelin, 2020
Creators: name: Blili-Hamelin, Borhane
name: Schley, Sara
name: Duckles, Beth
Publisher: name: Zenodo
Year: 2020
Subjects: flexible online pedagogty

description: Template for gdoc model described in: Schley, S., Duckles, B., & Borhane, B. In Press. Open Knowledge and collaborative documents. To appear in Journal of Faculty Development, Sept. 2020. Content also appears here: https://bit.ly/workingopen_gdoc
ХАРАКТЕРИСТИКА ТУРБУЛЕНТНОГО ТЕЧЕНИЯ С ПОМОЩЬЮ ЧИСЛЕННОГО МОДЕЛИРОВАНИЯ
Creators: name: Муродов, О.Ж.
name: Адилова, А.Ш.
name: Абдуллаев, А.С.
Publisher: name: Zenodo
Year: 2024

description: The article suggests using an equation for turbulent viscosity and analytical relationships from reliable sources to determine the size of turbulence. The boundary layer equation was utilized for mathematical modeling; it was expressed in stationary form in physical coordinates. Known from sources numerical methods are applied to solve these equations.
Slicing planar grid diagrams: a gentle introduction to bordered Heegaard Floer homology
Creators: name: Lipshitz, Robert
name: Ozsvath, Peter
name: Thurston, Dylan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57Rxx, 53D40

description: We describe some of the algebra underlying the decomposition of planar grid diagrams. This provides a useful toy model for an extension of Heegaard Floer homology to 3-manifolds with parametrized boundary. This paper is meant to serve as a gentle introduction to the subject, and does not itself have immediate topological applications.
description: 25 pages, 9 figures
No trifling with love; a record and analysis of a production
Creators: name: Wintermans, Adrienne L.
Publisher: name: University of British Columbia
Year: 2011

description: No Trifling With Love, a new adaptation by Frank Canino of Alfred de Musset's 19th Century French play, was produced and directed by Adrienne Wintermans, in partial fulfilment of the requirements for a Master of Arts degree in the Department of Theatre of the University of British Columbia, at the Dorothy Somerset Studio Theatre, from November 20 to 23rd, 1968. The following is a detailed record of that production, together with the director's analysis and interpretation of the script. No Trifling With Love was performed by a predominantly student cast, in costumes and setting designed by Michelle Bjornson, with choreography by Richard Blackhurst and with original music composed and arranged by Jim Colby and played by three musicians employing flute, piano, guitar and percussion instruments. This record is divided into three main sections. The first is an essay in five parts, consisting respectively of: the biographical and historical background of the playwright and the play; the literary influences found in On ne badine pas avec l'amour; a comparison of the adaptation used for this production with previous translations of the play; an analysis of No Trifling With Love in this adaptation; and finally a short section setting forth as simply as possible, the specific directorial concept used for this production. The essay is followed by a short bibliography which is not intended as a complete list of the works on or by de Musset, but gives an indication of those which were taken into consideration during the preparation of this production. The second section is made up of the prompt script of the production, showing the division of the play into units, blocking, and music, lighting and scenery cues. The script is followed by a unit by unit analysis of each scene, briefly discussing the directorial approach taken in terms of purpose, action, motivation, dominant emotions, character dominance and particular difficulties involved. The third section is made up of various tables, records and illustrations relating directly to the production. Included are lists of light cues, set changes, property and costume lists, cost lists and box office reports. Also included are transcripts of the music composed for the production samples of the programme and copies of the press reviews. The illustrations include colour photographs of the production, renderings of the sets, costumes and projections, and finally blue-prints of the floor plan and working drawings.
Surface and size effect on fluctuations correlation in nanoparticles with long-range order
Creators: name: Morozovska, A. N.
name: Eliseev, E. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Surface and size effect on the order parameter fluctuations and critical phenomena in the intensively studied 3D-confined nanosized systems with long-range order was not considered theoretically, while the calculations for bulk samples and thick films were performed long ago. Since widely used magnetic resonance, diffraction and scattering methods collect information about both macro- and nanosystems via the structural factors, which are directly related with fluctuations correlator, analytical expressions for the correlation function of the order parameter fluctuations seem extremely necessary for quantitative analyses of the experimental data broad spectrum. In the letter we solve the vital problem within Landau-Ginzburg-Devonshire phenomenological approach for the particles of arbitrary shape and consider concrete examples of the spherical and cylindrical ferroic nanoparticles. Allowing for the strong surface energy contribution, analytical expressions derived for Ornstein-Zernike correlator of the long-range order parameter fluctuations in 3D-confined system, dynamic generalized susceptibility, relaxation times and correlation radii discrete spectrum are principally different from those known for bulk system. Besides the great importance of the fluctuations correlation function for the analyses of scattering and magnetic resonance experimental spectra, proposed expression for fluctuations strength defines the fundamental limit of phenomenological theory applicability for 3D-confined nanosystems.
description: 15 pages, 2 figures, 1 appendix
Favorable adjustment of periods for reduced hyperperiods in real-time systems
Creators: name: Oehlert, Dominic Paul
name: Luppold, Arno
name: Falk, Heiko
Publisher: name: TUHH Universitätsbibliothek
Year: 2019
Subjects: subject: hyperperiod
subject: real-time
subject: integer linear programming
subject: 600: Technik
subject: 620: Ingenieurwissenschaften
subject: 620
subject: 600

description: The hyperperiod defines the time span after which the temporal behavior of a periodical real-time system repeats. It is the key property which determines the complexity of both analysis and exhaustive simulation of a given system. Unfortunately, the hyperperiod may easily become very large. We introduce an ILP-based approach to modify the periods in a task set according to user constraints to retrieve an optimal solution for a drastically reduced hyperperiod.
Neighborhood radius estimation in Variable-neighborhood Random Fields
Creators: name: Loecherbach, Eva
name: Orlandi, Enza
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60D05, 62F12, 60G55, 60G60, 62M40

description: We consider random fields defined by finite-region conditional probabilities depending on a neighborhood of the region which changes with the boundary conditions. To predict the symbols within any finite region it is necessary to inspect a random number of neighborhood symbols which might change according to the value of them. In analogy to the one dimensional setting we call these neighborhood symbols the context of the region. This framework is a natural extension, to d-dimensional fields, of the notion of variable-length Markov chains introduced by Rissanen (1983) in his classical paper. We define an algorithm to estimate the radius of the smallest ball containing the context based on a realization of the field. We prove the consistency of this estimator. Our proofs are constructive and yield explicit upper bounds for the probability of wrong estimation of the radius of the context.
Understanding the interaction of polyelectrolyte architectures with proteins and biosystems
Creators: name: Achazi, Katharina
name: Haag, Rainer
name: Ballauff, Matthias
name: Dernedde, Jens
name: Kizhakkedathu, Jayachandran N.
name: Maysinger, Dusica
name: Multhaup, Gerd
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: polyelectrolyte
subject: counterion release
subject: sulfated dendritic polyglycerol
subject: complement binding
subject: inflammation
subject: sepsis
subject: heparin
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Polyelectrolytes such as e.g. DNA or heparin are long linear or branched macromolecules onto which charges are appended. The counterions neutralizing these charges may dissociate in water and will largely determine the interaction of such polyelectrolytes with biomolecules and in particular with proteins. Here we review studies on the interaction of proteins with polyelectrolytes and how this knowledge can be used for medical applications. Counterion release was identified as the main driving force for the binding of proteins to polyelectrolytes: Patches of positive charge become multivalent counterions of the polyelectrolyte which leads to the release of counterions of the polyelectrolyte and a concomitant increase of entropy. We show this by surveying investigations done on the interaction of proteins with natural and synthetic polyelectrolytes. Special emphasis is laid on sulfated dendritic polyglycerols (dPGS). The entire overview demonstrates that we are moving on to a better understanding of charge‐charge interaction in system of biological relevance. Hence, research along these lines will aid and promote the design of synthetic polyelectrolytes for medical applications.
A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots
Creators: name: Laird, E. A.
name: Barthel, C.
name: Rashba, E. I.
name: Marcus, C. M.
name: Hanson, M. P.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A recently discovered mechanism of electric dipole spin resonance, mediated by the hyperfine interaction, is investigated experimentally and theoretically. The effect is studied using a spin-selective transition in a GaAs double quantum dot. The resonant frequency is sensitive to the instantaneous hyperfine effective field, revealing a nuclear polarization created by driving the resonance. A device incorporating a micromagnet exhibits a magnetic field difference between dots, allowing electrons in either dot to be addressed selectively. An unexplained additional signal at half the resonant frequency is presented.
description: Submitted as part of a SST special issue on spin-orbit effects in spintronics. Related papers at http://marcuslab.harvard.edu
Experiment and simulation investigation of flow characters in metal foam
Creators: name: Hu, Junhu
name: Hu, Kaiqiang
name: Zhang, Yinsheng
name: Yang, Xiaohong
name: Wu, Shunli
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: The thermal and hydraulic properties of flow through metal foams have been further investigated, but knowledge of flow through the Metal foam is still limited. In this work, three samples of copper foams (10, 20, and 30 PPI) were carried out for experiments and numerical simulations to investigate airflow characters through a tunnel. A novel honeycomb-like equivalent model is proposed to predict the internal flow characteristics of foam metals. Compere with the numerical simulation of pressures drop and flow conditions of three types equivalent model (FCC, Ligament model, and Honeycomb geometry model) in commercial software FLUENT. The honeycomb-like equivalent model possesses excellent prediction accuracy of pressure at 20 PPI and the overall average error is 4.27%. The difference in velocity increase with the rising of inlet velocity and a decreasing tendency of difference in velocity with the increase of porosities on the two sides of the copper foam.
SpectroCube: a European 6U nanosatellite spectroscopy platform for astrobiology and astrochemistry
Creators: name: Elsaesser, Andreas
name: Merenda, Fabrice
name: Lindner, Robert
name: Walker, Roger
name: Buehler, Steeve
name: Boer, Gerben
name: Villa, Andrés
name: Hallak, Yanina
name: Aguado, Fernando
name: Alberti, Edoardo
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: astrochemistry
subject: astrobiology
subject: in-situ monitoring
subject: fourier-transform infrared spectroscopy
subject: CubeSat
subject: highly elliptical Earth orbit
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: SpectroCube is a CubeSat-based miniaturized in-situ space exposure platform for astrochemistry and astrobiology research. Within a 6 unit (6U, with 1U corresponding to 10 cm x 10 cm x 10 cm) nanosatellite structure, an infrared spectrometer is interfaced with a sample handling system to measure photochemical changes of organic molecules, representing important biomarkers for the detection of life in our solar system and beyond. Monitoring degradation profiles and photochemical reaction kinetics of such biomarkers allows to identify suitable search targets for current and future planetary exploration and life-detection missions. SpectroCube is designed to be launched into a highly elliptical orbit around Earth and therefore allows to expose samples to higher solar UV and energetic particle radiation levels than previous exposure platforms in low Earth orbit, as for example on the International Space Station. In-situ data will be telemetered back to Earth and compared with solar and planetary simulation experiments in ground-based laboratory. We here present the design of SpectroCube, the scientific payload and its subsystems. We demonstrate that with the miniaturisation potential of infrared spectroscopy it is possible to fit the entire optical setup plus a sample handling system for up to 60 individually contained and hermetically sealed samples within less than half of the volume of a 6U CubeSat structure. Therefore, the remaining volume can be entirely used for additional subsystems such as attitude control, propulsion, fuel, onboard computer and telemetry. The design of the scientific payload is based on a commercial off-the-shelf miniaturised Fourier-transform spectrometer consisting of an infrared light source, an interferometer and infrared detector units. The mechanical robustness and suitability of such a system for space applications was assessed. Shock and vibration testing of the mechanically most sensitive unit, the interferometer, was performed and revealed that with adequate damping the spectroscopic performance can be maintained. Additional measurements of test samples conducted with the selected commercial off-the-shelf spectrometer candidate showed that the spectroscopic range, resolution and sensitivity is capable to monitor in situ the photochemical kinetics of important classes of organic molecules and biomarkers for astrobiology and astrochemistry research.
Gluon Excitations and Quark Chiral Symmetry in the Meson Spectrum: an Einbein Solution to the Large Degeneracy Problem of Light Mesons
Creators: name: Bicudo, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A large approximate degeneracy of the excited hadron spectra, appears in the light meson spectra measured at LEAR, suggesting a novel principal quantum number n+j in QCD spectra. We recently showed that the large degeneracy could not be understood with state of the art confining and chiral invariant quark models, derived in a truncated Coulomb gauge. To search for a solution to this problem, here we add the gluon or string degrees of freedom. Although independently the quarks or the gluons would lead to a 2 n +j or 2 n +l spectrum, adding them may lead to the desired n+j pattern.
description: 2 figures, 1 table, more detailed version
Counting MSTD Sets in Finite Abelian Groups
Creators: name: Zhao, Yufei
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11P99, 05C69

description: In an abelian group G, a more sums than differences (MSTD) set is a subset A of G such that |A+A|>|A-A|. We provide asymptotics for the number of MSTD sets in finite abelian groups, extending previous results of Nathanson. The proof contains an application of a recently resolved conjecture of Alon and Kahn on the number of independent sets in a regular graph.
description: 17 pages
Gravitational Stability of Boson Stars
Creators: name: Kusmartsev, Fjodor V.
name: Mielke, Eckehard W.
name: Schunck, Franz E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the stability of general-relativistic boson stars by classifying singularities of differential mappings and compare it with the results of perturbation theory. Depending on the particle number, the star has the following regimes of behavior: stable, metastable, pulsation, and collapse.
The asymmetry of the dimension 2 gluon condensate: the zero temperature case
Creators: name: Dudal, D.
name: Gracey, J. A.
name: Vandersickel, N.
name: Vercauteren, D.
name: Verschelde, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide an algebraic study of the local composite operators A_μA_ν-δ_{μν}/d A^2 and A^2, with d=4 the spacetime dimension. We prove that these are separately renormalizable to all orders in the Landau gauge. This corresponds to a renormalizable decomposition of the operator A_μA_νinto its trace and traceless part. We present explicit results for the relevant renormalization group functions to three loop order, accompanied with various tests of these results. We then develop a formalism to determine the zero temperature effective potential for the corresponding condensates, and recover the already known result for \neq 0, together with =0, a nontrivial check that the approach is consistent with Lorentz symmetry. The formalism is such that it is readily generalizable to the finite temperature case, which shall allow a future analytical study of the electric-magnetic symmetry of the condensate, which received strong evidence from recent lattice simulations by Chernodub and Ilgenfritz, who related their results to 3 regions in the Yang-Mills phase diagram.
description: 25 pages
Intrinsic Differential Geometry and the Existence of Quasimeromorphic Mappings
Creators: name: Saucan, Emil
Publisher: name: arXiv
Year: 2009
Subjects: subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 30C65, 53A07, 53C20, 57R05

description: We give a new proof of the existence of nontrivial quasimeromorphic mappings on a smooth Riemannian manifold, using solely the intrinsic geometry of the manifold.
description: 9 pages
A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
Creators: name: Sharma, Rishi
name: Vitev, Ivan
name: Zhang, Ben-Wei
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the lowest order charm and beauty parton distribution functions in and fragmentation functions into D and B mesons using the operator definitions of factorized perturbative QCD. In the vacuum, we find the leading corrections that arise from the structure of the final-state hadrons. Quark-antiquark potentials extracted from the lattice are employed to demonstrate the existence of open heavy flavor bound-state solutions in the QGP in the vicinity of the critical temperature. We provide first results for the in-medium modification of the heavy quark distribution and decay probabilities in a co-moving plasma. In an improved perturbative QCD description of heavy flavor dynamics in the thermal medium, we combine D and B meson formation and dissociation with parton-level charm and beauty quark quenching to obtain predictions for the heavy meson and non-photonic electron suppression in Cu+Cu and Pb+Pb collisions at RHIC and the LHC, respectively.
description: As published in Physical Review. Significantly extended: 19 pages, 9 .eps figures, 3 tables. Technical details and appendix added
Light Hadron Masses and Decay Constants
Creators: name: Scholz, Enno E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The extraction of the light hadron spectrum from a first-principle Quantum Chromodynamics approach is a profound application for lattice simulations of Quantum Chromodynamics. This review will cover recent lattice results for the masses and decay constants of the light hadrons. In particular, the applicability of different approaches for the extrapolation towards the physical point will be discussed.
description: 22 pages, invited review talk given at the "Lattice 2009" conference, Beijing, July 2009, v2: updated references, version published in PoS
Sculpting Organic Order: The Nature of Ornament
Creators: name: Jonsson, Stephanie
Publisher: name: Emily Carr University of Art and Design
Year: 2012
Subjects: Decorative arts--Modernism (Art)--Ceramics--Decoration and ornament

description: This paper presents academic and practice based research. Exploring the concepts of ornament, pattern, and decoration, it aims to define these terms as they are applied in the research and studio. The role of ornament in Modernism, examples of ornament in nature, and nature inspired ornamental forms throughout history are examined. It considers the marginalized position of craft in relation to fine art, and illustrates the shifting nature of this relationship in the work of artists who use craft mediums. The association of decoration and craft with the feminine and “women’s work” is also explored. The methodology for the artwork involves research that is influenced by a formative undergraduate degree, a reflexive studio practice, conventional scholarly research, observation of natural forms, and adaptation of patterns in nature to consumer objects. The methodology describes the use of both craft materials, such as ceramics and textiles, and fine art materials as an ornate responses to Minimalism. The paper presents a selection of artworks that use this methodology as examples of these responses.
description: Craft
description: Sculpture
description: Textiles
Real Scalar Fields on Manifolds
Creators: name: Morris, J. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A generic theory of a single real scalar field is considered, and a simple method is presented for obtaining a class of solutions to the equation of motion. These solutions are obtained from a simpler equation of motion that is generated by replacing a set of the original coordinates by a set of generalized coordinates, which are harmonic functions in the spacetime. These ansatz solutions solve the original equation of motion on manifolds that are defined by simple constraints. These manifolds, and their dynamics, are independent of the form of the scalar potential. Some scalar field solutions, and manifolds upon which they exist, are presented for Klein-Gordon and quartic potentials as examples. Solutions existing on leaves of a foliated space may allow inferences of the characteristics expected of exact bulk solutions.
description: 11 pages, no figs. To appear in J.Phys.A