cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rank-width of Random Graphs
Creators: name: Lee, Choongbum
name: Lee, Joonkyung
name: Oum, Sang-il
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C80, 05C78

description: Rank-width of a graph G, denoted by rw(G), is a width parameter of graphs introduced by Oum and Seymour (2006). We investigate the asymptotic behavior of rank-width of a random graph G(n,p). We show that, asymptotically almost surely, (i) if 0 1, then rw(G(n,p)) > r n for some r = r(c), and (iv) if p <= c/n and c<1, then rw(G(n,p)) <=2. As a corollary, we deduce that G(n,p) has linear tree-width whenever p=c/n for each c>1, answering a question of Gao (2006).
description: 10 pages
Symmetries and dynamics in an AC-driven self-assembled quantum dot lens
Creators: name: Rodríguez, Arezky H.
name: Meza-Montes, Lilia
name: Trallero-Giner, Carlos
name: Ulloa, Sergio E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Theoretical results for a single electron in multi-level system given by a lens-shape self-assembled quantum dot in the presence of an intense harmonic electric field are presented. A non-perturbative Floquet approach is used to study the dynamical localization of the particle when going beyond the two-level approach by introducing the full spectral level structure. It is discussed the role of the different quasi-energy sidebands as the parameters of the system change. It is found that the contribution of different drive harmonics is controlled by fine tuning of field intensity. It is also shown that avoided crossings in the quasi-energy spectrum are correlated with the spectral force of the sidebands and dynamical state localization.
description: 5 pages, 3 figures
Periodic Center Manifolds for Nonhyperbolic Limit Cycles in ODEs
Creators: name: Lentjes, Bram
name: Windmolders, Mattias
name: Kuznetsov, Yuri A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34C25, 34C45, 37G15

description: In this paper, we deal with a classical object, namely, a nonhyperbolic limit cycle in a system of smooth autonomous ordinary differential equations. While the existence of a center manifold near such a cycle was assumed in several studies on cycle bifurcations based on periodic normal forms, no proofs were available in the literature until recently. The main goal of this paper is to give an elementary proof of the existence of a periodic smooth locally invariant center manifold near a nonhyperbolic cycle in finite-dimensional ordinary differential equations by using the Lyapunov-Perron method. In addition, we provide several explicit examples of analytic vector fields admitting (non)-unique, (non)-$C^{\infty}$-smooth and (non)-analytic periodic center manifolds.
description: 35 pages, 4 figures
Collected papers on the biology of the skin and hair growth and other contributions
Creators: name: Lyne, AG
Publisher: name: University Of Tasmania
Year: 2023

description: This collection of papers is the results, obtained since 1951, of research concerned mainly with the biology of the skin and hair growth. The other contributions deal mainly with the body growth and development of marsupials. None of the work has been submitted elsewhere for the degree of Doctor of Science. A large proportion of the research has been on sheep and marsupials. Particular attention is drawn to the usefulness of marsupials as experimental material in studies on the integument and body growth. The early birth in marsupials is a most desirable feature for many developmental studies, as development in a pouch, unlike development in the uterus, lends itself to both observation and experiment. Papers 1-10, 12, 14 and 46 were incorporated in a thesis for the degree of Ph.D. in the University of Tasmania (1958). I am responsible for one third of the work reported in three papers (21, 24, 49), half of the work reported in ten papers (4, 6, 8, 15, 18, 19, 31, 36, 38, 44), and at least half of the work reported in the other publications with two or more authors. Publications 11, 29, 47, 51, 53, 54 and 56 are essentially popular or review contributions. All other works report original research.
Dissecting the Thermal SZ Power Spectrum by Halo Mass and Redshift in SPT-SZ Data and Simulations
Creators: name: Hernandez, Josemanuel
name: Bleem, Lindsey
name: Crawford, Thomas
name: Huang, Nicholas
name: Omori, Yuuki
name: Raghunathan, Srinivasan
name: Reichardt, Christian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the relationship between the thermal Sunyaev-Zel'dovich (tSZ) power spectrum amplitude and the halo mass and redshift of galaxy clusters in South Pole Telescope (SPT) data, in comparison with three $N$-body simulations combined with semi-analytical gas models of the intra-cluster medium. Specifically, we calculate both the raw and fractional power contribution to the full tSZ power spectrum amplitude at $\ell = 3000$ from clusters as a function of halo mass and redshift. We use nine mass bins in the range $1 \times 10^{14}\ M_\odot\ h^{-1} < M_{500} < 2 \times 10^{15}\ M_\odot\ h^{-1}$, and two redshift bins defined by $0.25 < z < 0.59$ and $0.59 < z < 1.5$. We additionally divide the raw power contribution in each mass bin by the number of clusters in that bin, as a metric for comparison of different gas models. At lower masses, the SPT data prefers a model that includes a mass-dependent bound gas fraction component and relatively high levels of AGN feedback, whereas at higher masses there is a preference for a model with a lower amount of feedback and a complete lack of non-thermal pressure support. The former provides the best fit to the data overall, in regards to all metrics for comparison. Still, discrepancies exist and the data notably exhibits a steep mass-dependence which all of the simulations fail to reproduce. This suggests the need for additional mass- and redshift-dependent adjustments to the gas models of each simulation, or the potential presence of contamination in the data at halo masses below the detection threshold of SPT-SZ. Furthermore, the data does not demonstrate significant redshift evolution in the per-cluster tSZ power spectrum contribution, in contrast to self-similar model predictions.
description: 19 pages, 15 figures, 5 tables; accepted by the Open Journal of Astrophysics
How Controlled English can Improve Semantic Wikis
Creators: name: Kuhn, Tobias
Publisher: name: arXiv
Year: 2009
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: H.5.2; I.2.4

description: The motivation of semantic wikis is to make acquisition, maintenance, and mining of formal knowledge simpler, faster, and more flexible. However, most existing semantic wikis have a very technical interface and are restricted to a relatively low level of expressivity. In this paper, we explain how AceWiki uses controlled English - concretely Attempto Controlled English (ACE) - to provide a natural and intuitive interface while supporting a high degree of expressivity. We introduce recent improvements of the AceWiki system and user studies that indicate that AceWiki is usable and useful.
Higher Order QED Calculation of Ultrarelativistic Heavy Ion Production of mu+ mu- Pairs
Creators: name: Baltz, A. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A higher order QED calculation of the ultraperipheral heavy ion cross section for mu+ mu- pair production at RHIC and LHC is carried out. The so-called "Coulomb corrections" lead to an even greater percentage decrease of mu+ mu- production from perturbation theory than the corresponding decrease for e+ e- pair production. Unlike the e+ e- case, the finite charge distribution of the ions (form factor) and the necessary subtraction of impact parameters with matter overlap are significant effects in calculation an observable ultraperipheral mu+ mu- total cross section.
description: 7 pages, 3 figures. Version expanded with explanatory text and two appendices on form factor treatment
Probing the Dust Properties of Galaxies up to Submillimetre Wavelengths I. The Spectral Energy Distribution of dwarf galaxies using LABOCA
Creators: name: Galametz, Maud
name: Madden, Suzanne
name: Galliano, Frederic
name: Hony, Sacha
name: Schuller, Frederic
name: Beelen, Alexandre
name: Bendo, George
name: Sauvage, Marc
name: Lundgren, Andreas
name: Billot, Nicolas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present 870 micron images of four low metallicity galaxies (NGC1705, Haro11, Mrk1089 and UM311) observed with the Large APEX BOlometer CAmera (LABOCA). We model their spectral energy distributions combining the submm observations of LABOCA, 2MASS, IRAS, Spitzer photometric data and the IRS data for Haro11. We find that a significant mass of dust is revealed when using submm constraints compared to that measured with only mid-IR to far-IR observations extending only to 160 microns. For NGC1705 and Haro11, an excess in submillimeter wavelengths is detected and we rerun our SED procedure adding a cold dust component (10K) to better describe the high 870 micron flux derived from LABOCA observations, which significantly improves the fit. We find that at least 70% of the dust mass of these two galaxies can reside in a cold dust component. We also show that the subsequent dust-to-gas mass ratios, considering HI and CO observations, can be strikingly high for Haro11 in comparison with what is usually expected for these low-metallicity environments. Furthermore, we derive the SFR of our galaxies and compare them to the Schmidt law. Haro11 falls anomalously far from the Schmidt relation. These results may suggest that a reservoir of hidden gas could be present in molecular form not traced by the current CO observations. We also derive the total IR luminosities derived from our models and compare them with relations that derive this luminosity from Spitzer bands. We find that the Draine & Li (2007) formula compares well to our direct IR determinations.
description: 22 pages, 7 figures, 10 tables, accepted for publication in A&A
A unified worst case for classical simplex and policy iteration pivot rules
Creators: name: Disser, Yann
name: Mosis, Nils
Publisher: name: arXiv
Year: 2023
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: F.2.2; G.1.6; G.3
subject: 90C05 (Primary) 90C40 (Secondary)

description: We construct a family of Markov decision processes for which the policy iteration algorithm needs an exponential number of improving switches with Dantzig's rule, with Bland's rule, and with the Largest Increase pivot rule. This immediately translates to a family of linear programs for which the simplex algorithm needs an exponential number of pivot steps with the same three pivot rules. Our results yield a unified construction that simultaneously reproduces well-known lower bounds for these classical pivot rules, and we are able to infer that any (deterministic or randomized) combination of them cannot avoid an exponential worst-case behavior. Regarding the policy iteration algorithm, pivot rules typically switch multiple edges simultaneously and our lower bound for Dantzig's rule and the Largest Increase rule, which perform only single switches, seem novel. Regarding the simplex algorithm, the individual lower bounds were previously obtained separately via deformed hypercube constructions. In contrast to previous bounds for the simplex algorithm via Markov decision processes, our rigorous analysis is reasonably concise.
Deformation and properties of cohesive soil in relation to soil-machine systems
Creators: name: Kim, Joo Ick
Publisher: name: University of British Columbia
Year: 2011

description: Methods of determining the deformation characteristic physical properties and dynamic response of cohesive soils were evaluated in order to obtain design parameters for soil-machine systems. The study was limited to simple scaled soil-machine systems on Haney clay and on mixed Haney clay and Ottawa sand in the semi-solid to plastic range. A special moire method was successfully developed to study large deformation and translation paths of soil as a function of tool shape and position. Compression, direct shear, stress wave and forced vibration methods were used to measure mechanical properties of soils. Advantages and disadvantages of each method were evaluated. Quasi-static stress-strain relationships were established from improved unconfined compression tests to produce unixial compression. Yield stress and strain hardening effects could be observed from these tests. Rate dependency of cohesive soil was verified by observing stress wave propagation in soil. It was observed that stress wave propagation velocity was more sensitive to soil particle size than to soil strength. Forced vibration methods were used to evaluate elastic constants such as Young's modulus and shear modulus which are useful in determining the contribution of elastic strains to the total force required to deform a soil. The theory of plasticity was successfully used in conjunction with experimental observations to establish stress-strain relationships in the soil on the assumption that strain hardening was linear and elastic strains were negligible. The maximum difference between theoretical forces deduced on the above basis and measured forces was less than twenty percent. The use of gelatin as a simulated soil was investigated to determine whether its use could provide a useful qualitative aid to design of soil-machine systems. It was found that the gelatin study gave stress trajectories and slip lines which resembled the results observed by the moire method in actual soil. Results obtained from the application of soil-machine systems on simulated soil and prototype soil were compared.
Matrix factorisations and open topological string theory
Creators: name: Carqueville, Nils
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Amplitudes in open topological string theory may be described completely by certain A-infinity-categories. We detail a general construction of all cyclic minimal models for a given A-infinity-algebra and apply this result to the case of N=2 supersymmetric Landau-Ginzburg models. This allows to solve the tree-level theory in the sense that all amplitudes and hence the effective superpotential can be computed algorithmically. Furthermore, the construction provides a novel derivation of the topological metric of such models.
description: 30 pages; v2: three typos corrected
Surface superconductor-insulator transition: Reduction of the critical electric field by Hartree-Fock potential
Creators: name: Chen, Yajiang
name: Zhu, Quanyong
name: Zhang, Ming
name: Luo, Xiaobing
name: Shanenko, A. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recently, a surface superconductor-insulator transition has been predicted for a bulk superconductor in an electric field applied perpendicular to its surface. The related calculations were performed within a one-dimensional Hubbard model by numerically solving the Bogoliubov-de Gennes (BdG) equations without the Hartree-Fock (HF) interaction potential. The phase diagram of the surface superconducting, metallic, and insulating states was obtained as dependent on the electric field and temperature. This diagram was found to be in agreement with experimental results reported previously for (Li,Fe)OHFeSe thin flakes. In the present work, by taking into account the HF potential, we find that the latter acts as a kind of an extra electrostatic potential that enhances the electric-field effects on the surface states. The qualitative features of the phase diagram remain the same but the surface superconductor-insulator transition occurs at significantly lower electric fields, which supports prospects of its experimental observation in bulk samples.
description: 5 figures
Some Aspects of the Exact Foldy-Wouthuysen Transformation for a Dirac Fermion
Creators: name: Goncalves, Bruno
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Foldy-Wouthuysen transformation (FWT) is used to separate distinct components of relativistic spinor field, e.g. electron and positron. Usually, the FWT is perturbative, but in some cases there is an involution operator and the transformation can be done exactly. We consider some aspects of an exact FWT and show that, even if the theory does not admit an involution operator, one can use the technique of exact FWT to obtain the conventional perturbative result. Several particular cases can be elaborated as examples.
CMB Lensing Constraints on Neutrinos and Dark Energy
Creators: name: de Putter, Roland
name: Zahn, Oliver
name: Linder, Eric V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Signatures of lensing of the cosmic microwave background radiation by gravitational potentials along the line of sight carry with them information on the matter distribution, neutrino masses, and dark energy properties. We examine the constraints that Planck, PolarBear, and CMBpol future data, including from the B-mode polarization or the lensing potential, will be able to place on these quantities. We simultaneously fit for neutrino mass and dark energy equation of state including time variation and early dark energy density, and compare the use of polarization power spectra with an optimal quadratic estimator of the lensing. Results are given as a function of systematics level from residual foreground contamination. A realistic CMBpol experiment can effectively constrain the sum of neutrino masses to within 0.05 eV and the fraction of early dark energy to 0.002. We also present a surprisingly simple prescription for calculating dark energy equation of state constraints in combination with supernova distances from JDEM.
description: 18 pages, 14 figures. Small changes made to match version to be published in Phys. Rev. D
The effect of dramatic concept in the non-realistic plays of Eugene O'Neill and Thornton Wilder
Creators: name: Kent, Stella Ann
Publisher: name: University Of Tasmania
Year: 2023

description: Both Eugene O'Neill and Thornton Wilder reacted against the naturalism of turn-of-the-century drama, believing that non-realistic methods could be more effectively used to present the truth. Influenced by recent experiments in Europe, and deriving inspiration from Greek, Elizabethan and Oriental models, the playwrights searched for novel techniques to wake up the audience and shake it into awareness of man's universal and contemporary situation. This study of twenty-six plays considers the success of these devices. A discussion of the structure of the plays in Chapter Two explores O'Neill's use of compression, parallels, and repetition to give the plays rhythm and force and his selection of episodes which give heightened significance to the action which is often played out against a large background. Similarly Wilder's concentration on symbolic moments, the deliberately jerky movement of many plays and the telescoping of time give his characters and action a cosmological and metaphysical framework. In Chapter Three a study is made of the effect of characters who are seen by the authors as only part of the whole play, and are often used to illustrate only one or two human traits. Representational and cliche characters, personalities from history and myth, the personification of animals and places, and characters who address the audience strengthen Wilder's reminder to us that a play is a piece of fiction. O'Neill's development of the mask is traced with its various purposes of showing inner personality, conflict within the characters, lack of individuality, and for its sheer dramatic power. Chapters Four and Five analyse the dramatists' use of sound and visual effects. Although aware that great language was not possible in the early twentieth century, O'Neill relies heavily on rhythm, silence and pauses, the use of speech sounds, laughter, music and sound effects to give emotional impact to the action. The asides of Strange Interlude were a unique experiment which allowed layers of conflicting emotions to be shown. Wilder's monologues and casual speech, lightened by humour and platitudes, make his philosophical concerns more palatable to the audience. Both authors were aware that stage-positioning, movement, sets, mime, dance, frozen posture, colour, lighting and costume could disencumber the dialogue, focus our attention and create atmosphere. The last Chapter attempts to assess what the playwrights achieved with their experiments, both in terms of their success in performance and reading, and in terms of the influence exerted on a later generation of writers. American drama owes a significant debt to both authors for liberating it from a stale realistic tradition.
Acceptable Complexity Measures of Theorems
Creators: name: Grenet, Bruno
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In 1931, Gödel presented in Königsberg his famous Incompleteness Theorem, stating that some true mathematical statements are unprovable. Yet, this result gives us no idea about those independent (that is, true and unprovable) statements, about their frequency, the reason they are unprovable, and so on. Calude and Jürgensen proved in 2005 Chaitin's "heuristic principle" for an appropriate measure: the theorems of a finitely-specified theory cannot be significantly more complex than the theory itself. In this work, we investigate the existence of other measures, different from the original one, which satisfy this "heuristic principle". At this end, we introduce the definition of acceptable complexity measure of theorems.
description: 16 pages, presented at NKS Midwest Conference '08
title: Rezension zu: Kaupp, Angela / Höring, Patrik C. (Hg.): Handbuch Kirchliche Jugendarbeit. Für Studium und Praxis, Freiburg i. Br.: Herder 2019 (=Grundlagen Theologie).
Creators: name: Löser, Saskia
Publisher: name: Universität Graz
Year: 2021

description: Österreichisches Religionspädagogisches Forum 29 (2021) 2 • 250–253
Uncertainty relations revisited
Creators: name: Englert, Berthold-Georg
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Introductory courses on quantum mechanics usually include lectures on uncertainty relations, typically the inequality derived by Robertson and, perhaps, other statements. For the benefit of the lecturers, we present a unified approach -- well suited for undergraduate teaching -- for deriving all standard uncertainty relations: those for products of variances by Kennard, Robertson, and Schrödinger, as well as those for sums of variances by Maccone and Pati. We also give a brief review of the early history of this topic and try to answer why the use of variances for quantifying uncertainty is so widespread, while alternatives are available that can be more natural and more fitting.
 It is common to regard the states that saturate the Robertson inequality as "minimum uncertainty states" although they do not minimize the variance of one observable, given the variance of another, incompatible observable. The states that achieve this objective are different and can be found systematically.
description: 10 pages, 7 figures; 27th CEWQO, Milano, Italy, 3-7 July 2023; v2 has minor corrections and added material; v3 includes one more reference
Study of a homogeneous QSO sample: relations between the QSO and its host galaxy
Creators: name: Letawe, Y.
name: Letawe, G.
name: Magain, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyse a sample of 69 QSOs which have been randomly selected in a complete sample of 104 QSOs (R<18, 0.142 < z < 0.198). 60 have been observed with the NTT/SUSI2 at La Silla, through two filters in the optical band (WB#655 and V#812), and the remaining 9 are taken from archive databases. The filter V#812 contains the redshifted Hbeta and forbidden [OIII] emission lines, while WB#655 covers a spectral region devoid of emission lines, thus measuring the QSO and stellar continua. The contributions of the QSO and the host are separated thanks to the MCS deconvolution algorithm, allowing a morphological classification of the host, and the computation of several parameters such as the host and nucleus absolute V-magnitude, distance between the luminosity center of the host and the QSO, and colour of the host and nucleus. We define a new asymmetry coefficient, independent of any galaxy models and well suited for QSO host studies. The main results from this study are: (i) 25% of the total number of QSO hosts are spirals, 51% are ellipticals and 60% show signs of interaction; (ii) Highly asymmetric systems tend to have a higher gas ionization level (iii) Elliptical hosts contain a substantial amount of ionized gas, and some show off-nuclear activity. These results agree with hierarchical models merger driven evolution.
description: accepted for publication in MNRAS, 19 pages, 22 figures, 8 tables
Regge trajectories for the light diquarks
Creators: name: Chen, Jiao-Kai
name: Xie, Jia-Qi
name: Feng, Xia
name: Song, He
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We attempt to present an unified description of the light meson spectra and the light diquark spectra by applying the Regge trajectory approach. However, we find that the direct application of the linear Regge trajectory formula for the light mesons and baryons fails. To address this issue, we fit the experimental data of light meson spectra and the light diquark spectra obtained by other theoretical approaches. By considering the light quark mass and the parameter $C$ in the Cornell potential, we provide a provisional Regge trajectory formula. We also crudely estimate the masses of the light diquarks $(ud)$, $(us)$, and $(ss)$, and find that they agree with other theoretical results. The diquark Regge trajectory not only becomes a new and very simple approach for estimating the spectra of the light diquarks, but also can explicitly show the behavior of the masses with respect to $l$ or $n_r$. Moreover, it is expected that the diquark Regge trajectory can provide a simple method for investigating the $ρ$-mode excitations of baryons, tetraquarks and pentaquarks containing diquarks.
description: 9 pages, 3 figures, 5 tables. Accepted for publication in the European Physical Journal C. arXiv admin note: text overlap with arXiv:2308.02289
Self-consistent solution of Kohn-Sham equations for infinitely extended systems with inhomogeneous electron gas
Creators: name: Posvyanskii, D. V.
name: Shul'man, A. Ya.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The density functional approach in the Kohn-Sham approximation is widely used to study properties of many-electron systems. Due to the nonlinearity of the Kohn-Sham equations, the general self-consistence searching method involves iterations with alternate solving of the Poisson and Schrödinger equations. One of problems of such an approach is that the charge distribution renewed by means of the Schrödinger equation solution does not conform to boundary conditions of Poisson equation for Coulomb potential. The resulting instability or even divergence of iterations manifests itself most appreciably in the case of infinitely extended systems. The published attempts to deal with this problem are reduced in fact to abandoning the original iterative method and replacing it with some approximate calculation scheme, which is usually semi-empirical and does not permit to evaluate the extent of deviation from the exact solution. In this work, we realize the iterative scheme of solving the Kohn-Sham equations for extended systems with inhomogeneous electron gas, which is based on eliminating the long-range character of Coulomb interaction as the cause of tight coupling between charge distribution and boundary conditions. The suggested algorithm is employed to calculate energy spectrum, self-consistent potential, and electrostatic capacitance of the semi-infinite degenerate electron gas bounded by infinitely high barrier, as well as the work function and surface energy of simple metals in the jellium model. The difference between self-consistent Hartree solutions and those taking into account the exchange-correlation interaction is analyzed. The case study of the metal-semiconductor tunnel contact shows this method being applied to an infinitely extended system where the steady-state current can flow.
description: 38 pages, 9 figures, to be published in ZhETF (J. Exp. Theor. Phys.)
Dust Coagulation Reconciles Protoplanetary Disk Observations with the Vertical Shear Instability. I. Dust Coagulation and the VSI Dead Zone
Creators: name: Pfeil, Thomas
name: Birnstiel, Til
name: Klahr, Hubert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Protoplanetary disks exhibit a vertical gradient in angular momentum, rendering them susceptible to the Vertical Shear Instability (VSI). The most important condition for the onset of this mechanism is a short timescale of thermal relaxation ($\lesssim 0.1$ orbital timescales). Simulations of fully VSI active disks are characterized by turbulent, vertically extended dust layers. This is in contradiction with recent observations of the outer regions of some protoplanetary disks, which appear highly settled. In this work, we demonstrate that the process of dust coagulation can diminish the cooling rate of the gas in the outer disk and extinct the VSI activity. Our findings indicate that the turbulence strength is especially susceptible to variations in the fragmentation velocity of the grains. A small fragmentation velocity of $\approx 100 \mathrm{\, cm \,s^{-1}}$ results in a fully turbulent simulation, whereas a value of $\approx 400 \mathrm{\, cm \,s^{-1}}$ results in a laminar outer disk, being consistent with observations. We show that VSI turbulence remains relatively unaffected by variations in the maximum particle size in the inner disk regions. However, we find that dust coagulation can significantly suppress the occurrence of VSI turbulence at larger distances from the central star.
description: 27 pages, 15 figures, published in The Astrophysical Journal
Lensed Cosmic Microwave Background Constraints on Post-General Relativity Parameters
Creators: name: Serra, Paolo
name: Cooray, Asantha
name: Daniel, Scott F.
name: Caldwell, Robert
name: Melchiorri, Alessandro
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The constraints on departures from general relativity (GR) at cosmological length scales due to cosmic microwave background (CMB) data are discussed. The departure from GR is measured by the ratio, parameterized as $1 +\varpi_0 (1 + z)^{-S}$, between the gravitational potentials conventionally appearing in the geodesic equation and the Poisson equation. Current CMB data indicate $\varpi_0=1.67^{+3.07}_{-1.87}$ at the 2$σ$ confidence level, while $S$ remains unconstrained. The departure from GR affects the lensing conversion of E-mode into B-mode polarization. Hence, the lensing measurements from a future CMBpol experiment should be able to improve the constraints to $\varpi_0< 0.30$ for a fiducial $\varpi_0=0$ model and independent of $S$.
description: 4 pages, 2 figures
The lowest-lying spin-1/2 and spin-3/2 baryon magnetic moments in chiral perturbation theory
Creators: name: Geng, L. S.
name: Martin-Camalich, J.
name: Alvarez-Ruso, L.
name: Vicente-Vacas, M. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review some recent progress in our understanding of the lowest-lying spin-1/2 and spin-3/2 baryon magnetic moments (MMs) in terms of Chiral Perturbation Theory (ChPT). In particular, we show that at next-to-leading-order ChPT can describe the MMs of the octet baryons quite well. We also make predictions for the decuplet MMs at the same chiral order. Among them, the MMs of the $Δ^{++}$ and $Δ^+$ are found to agree well with data within the experimental uncertainties.
description: 4 pages, 2 figures, talk given by L. S. Geng at the 5th International Conference on Quarks and Nuclear Physics, September 21-26, 2009, Beijing, China
Nonlinear-Cost Random Walk: exact statistics of the distance covered for fixed budget
Creators: name: Majumdar, Satya N.
name: Mori, Francesco
name: Vivo, Pierpaolo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the Nonlinear-Cost Random Walk model in discrete time introduced in [Phys. Rev. Lett. 130, 237102 (2023)], where a fee is charged for each jump of the walker. The nonlinear cost function is such that slow/short jumps incur a flat fee, while for fast/long jumps the cost is proportional to the distance covered. In this paper we compute analytically the average and variance of the distance covered in $n$ steps when the total budget $C$ is fixed, as well as the statistics of the number of long/short jumps in a trajectory of length $n$, for the exponential jump distribution. These observables exhibit a very rich and non-monotonic scaling behavior as a function of the variable $C/n$, which is traced back to the makeup of a typical trajectory in terms of long/short jumps, and the resulting "entropy" thereof. As a byproduct, we compute the asymptotic behavior of ratios of Kummer hypergeometric functions when both the first and last arguments are large. All our analytical results are corroborated by numerical simulations.
description: 31 pages, 8 figures
Generalized nonpolynomial Schrodinger equations for matter waves under anisotropic transverse confinement
Creators: name: Salasnich, Luca
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Starting from the three-dimensional Gross-Pitaevskii equation we derive a 1D generalized nonpolynomial Schrodinger equation, which describes the dynamics of Bose-Einstein condensates under the action of a generic potential in the longitudinal axial direction and of an anisotropic harmonic potential in the transverse radial direction. This equation reduces to the familiar 1D nonpolynomial Schrodinger equation [Phys. Rev. A 65, 043614 (2002)] in the case of isotropic transverse harmonic confinement. In addition, we show that if the longitudinal potential models a periodic optical lattice the 3D GPE can be mapped into a 1D generalized discrete nonpolynomial Schrodinger equation.
description: 9 pages, 2 figures, to be published in Journal of Physics A: Math. Theor
Extending the Gravitational Growth Framework
Creators: name: Linder, Eric V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The gravitational growth index formalism provides a model independent way to look for deviations from general relativity by testing dark energy physics distinct from its effects on the cosmic expansion history. Here we extend the approach to incorporate an early time parameter g_star in addition to the growth index in describing the growth of large scale structure. We illustrate its utility for models with modified gravity at high redshift, early acceleration, or early dark energy. Future data will have the capability to constrain the dark energy equation of state, the growth index gamma, and g_star simultaneously, with no degradation in the equation of state determination.
description: 8 pages, 5 figures
Topological phases of monolayer and bilayer depleted Lieb lattices
Creators: name: Sil, Arghya
name: Ghosh, Asim Kumar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Existence of nontrivial topological phases in a tight binding Haldane-like model on the depleted Lieb lattice is reported. This two-band model is formulated by considering the nearest-neighbor, next-nearest-neighbor and next-next-nearest-neighbor hopping terms along with complex phase which breaks the time reversal symmetry of this semi-metallic system. Topological feature of this model is studied along with the presence of sublattice symmetry breaking staggered onsite energy. Combined effect of these two broken symmetries is found crucial for an additional transition between nontrivial and trivial phases. System exhibits two types of phase transitions, say, between two nontrivial phases and nontrivial to trivial phases. Nonzero Chern numbers, existence of Hall plateau and symmetry protected edge states confirm the presence of the nontrivial phases. This two-band system hosts four different types of phases where two are topological. Additionally topological properties of stacked bilayer of the depleted Lieb lattices is also studied with similar Haldane-like Hamiltonian. This four-band system is found to host Chern insulating phases, with higher values of Chern numbers supported by in-gap edge states.
description: 10 pages, 8 figures
A vibration-insensitive optical cavity and absolute determination of its ultrahigh stability
Creators: name: Zhao, Y. N.
name: Zhang, J.
name: Stejskal, A.
name: Liu, T.
name: Elman, V.
name: Lu, Z. H.
name: Wang, L. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We use the three-cornered-hat method to evaluate the absolute frequency stabilities of three different ultrastable reference cavities, one of which has a vibration-insensitive design that does not even require vibration isolation. An Nd:YAG laser and a diode laser are implemented as light sources. We observe $\sim1$ Hz beat note linewidths between all three cavities. The measurement demonstrates that the vibration-insensitive cavity has a good frequency stability over the entire measurement time from 100 $μ$s to 200 s. An absolute, correlation-removed Allan deviation of $1.4\times10^{-15}$ at 1 s of this cavity is obtained, giving a frequency uncertainty of only 0.44 Hz.
description: 13 pages, 10 figures
Supporting Information
Creators: name: Golovynska, Iuliia
name: Stepanov, Yurii V.
name: Dziubenko, Nataliia V.
name: Kuznietsova, Halyna M.
name: Petriv, Nataliia
name: Skrypkina, Inessa
name: Golovynskyi, Sergii
name: Stepanova, Liudmyla I.
name: Stohnii, Yevhenii
name: Garmanchuk, Liudmyla V.
name: Ostapchenko, Liudmyla I.
name: Yevsa, Tetyana
name: Qu, Junle
name: Ohulchanskyy, Tymish
Y.
Publisher: name: figshare
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: NMDA receptor expression during cell transformation process at early stages of liver cancer
The interventionist concept of miracle and the possibility of miracles
Creators: name: Henri, SJ
Publisher: name: University Of Tasmania
Year: 2023

description: In this thesis I investigate the interventionist concept of miracle and the most serious objections to this concept. In the first chapter I introduce the topic and in Chapter Two I critically analyse D. Hume's attack upon the evidential value of claims about purported miracles. Hume's critique is the more significant since he was the first significant philosopher to define a miracle as a violation of a law of nature. After lengthy analysis I conclude that Hume's attack fails. In Chapter Three I analyse the charge that the fundamentals of historical enquiry rule out the possibility of our knowing that an alleged miracle has occurred. My analysis concentrates on the major attacks made by Flew and Van Harvey and the various rebuttals offered by their critics. I argue that the fundamentals of historical enquiry do not in fact rule out, either epistemically or psychologically, the possibility of miracles. In Chapter Four I continue the debate begun in Chapter Three by focussing on the claim that there is no natural, as opposed to revealed, way of distinguishing between a violation and a falsification of a law of nature. On the prior assumption that such a distinction makes sense I find that the argument fails. In Chapter Five I drop the assumption that the interventionist concept is coherent and take up a number of challenges to its logical coherence. In Chapter Six I continue this line by investigating the attacks from science on the coherence of the violation model. In this chapter I note that refinement to the traditional violation model is required if it is to withstand some of these major criticisms. In this chapter I also consider the possibility of rejecting the violation model in favour of a non-violation interventionist model. I conclude that the violation model is the more acceptable but note that it requires further refinement. In Chapter Seven I move away temporarily from the conceptual and epistemic appropriateness of defining a miracle as a violation of a law of nature and investigate the distinction between a violation of a law of nature and a miracle. In particular I look at the importance of the causal role of God; the sign structure of the event and its religious setting. I conclude that a miracle is in fact a complex mesh of elements bringing together the scientific and the religious. To define a miracle as a violation without giving due reference to religious factors is insufficient. In the final chapter I tie up a number of loose ends. I argue that a distinction should be made between the laws of science and the laws of nature and that a miracle is not a physically impossible event but rather a scientifically inexplicable event. I conclude by offering the following definition of miracle. A miracle is a violation of a law of science brought about by the primary action of God, occurring in religious context as a divine sign.
Update on onium masses with three flavors of dynamical quarks
Creators: name: Gottlieb, Steven
name: Levkova, L.
name: Di Pierro, M.
name: El-Khadra, A.
name: Kronfeld, A. S.
name: Mackenzie, P. B.
name: Simone, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We update results presented at Lattice 2005 on charmonium masses. New ensembles of gauge configurations with 2+1 flavors of improved staggered quarks have been analyzed. Statistics have been increased for other ensembles. New results are also available for P-wave mesons and for bottomonium on selected ensembles.
description: 7 pages, 10 figures, Lattice 2006 (Spectroscopy), Tucson, Arizona, appeared in the on-line proceedings long ago. A better paper should appear soon
Wave and Particle in Molecular Interference Lithography
Creators: name: Juffmann, Thomas
name: Truppe, Stefan
name: Geyer, Philipp
name: Major, Andras G.
name: Deachapunya, Sarayut
name: Ulbricht, Hendrik
name: Arndt, Markus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The wave-particle duality of massive objects is a cornerstone of quantum physics and a key property of many modern tools such as electron microscopy, neutron diffraction or atom interferometry. Here we report on the first experimental demonstration of quantum interference lithography with complex molecules. Molecular matter-wave interference patterns are deposited onto a reconstructed Si(111) 7x7 surface and imaged using scanning tunneling microscopy. Thereby both the particle and the quantum wave character of the molecules can be visualized in one and the same image. This new approach to nanolithography therefore also represents a sensitive new detection scheme for quantum interference experiments.
description: 4 pages, 3 figures
Supplements in finite groups.
Creators: name: McGough, Robert John
Publisher: name: University Of Tasmania
Year: 2023

description: A well-known problem in the theory of groups is that of finding conditions under which a given subgroup of a finite group has a normal complement. Since a group may be written as a semi-direct product of a subgroup and its normal complement, the structure of a group may be determined from the structure of these two smaller groups. Hence solutions of the above problem may be useful in determining the structure of certain groups. Important early work on normal complements was done by Burnside ([2], p.203) and Frobenius ([2], p.292). More recently Kochendorffer [5], Sah [10], Suzuki [12] and Zappa [15] have worked on this problem. The theorem of Suzuki has as corollaries the theorems of Burnside, Frobenius and Zappa. Kochendorffer [6] introduced the concept of a coefficient group belonging to a set of coset representatives of a given subgroup. Using this concept he has obtained results on the existence of a normal supplement to a given subgroup which are similar to those obtained on the existence of a normal complement. These results have since been extended by Prohaska [9]. In this thesis we introduce the concept of D-closure and use it to obtain several results on the existence of a normal supplement to a subgroup of a finite group. In Chapter 3 we show that D-closure is a weaker condition than that of Kockendorffer and that his and Prohaska's theorems still hold under the weaker condition. We then note that 1)-closure is a generalization of the concept of c-closure introduced by Sah [10] and obtain direct generalizations of results due to him and Suzuki. The major part of this thesis is contained in Chapter 3; Chapter 2 contains only introductory notation and definitions and a discussion of some of the properties of c-closure. Since completing the work on this thesis, section 3.2 has been published in the Bulletin of the Australian Mathematical Society under the title \A Note on a Theorem of Sah\" (see [7])."