cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spacetime geometry in (2+1)-gravity via measurements with returning lightrays
Creators: name: Meusburger, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider an observer in a (2+1)-spacetime without matter and cosmological constant who measures spacetime geometry by emitting lightrays which return to him at a later time. We investigate several quantities associated with such lightrays: the return time, the directions into which light needs to be emitted to return and the frequency shift between the lightray at its emission and its return. We derive explicit expressions for these quantities as functions on the reduced phase space and show how they allow the observer to reconstruct the full geometry of the spacetime in finite eigentime. We comment on conceptual issues. In particular, we clarify the relation between these quantities and Dirac observables and show that Wilson loops arise naturally in these quantities.
description: Talk given at the XXV Max Born Symposium: The Planck Scale (Wroclaw, June 29-July 3 2009) 10 pages, 4 eps figures
Vibrational properties and diffusion of hydrogen on graphene
Creators: name: Herrero, Carlos P.
name: Ramirez, Rafael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Hydrogen and deuterium chemisorption on a single layer of graphene has been studied by path-integral molecular dynamics simulations. Finite-temperature properties of these point defects were analyzed in the range from 200 to 1500 K, by using a tight-binding potential fitted to density-functional calculations. On one side, vibrational properties of the adatoms are studied at their equilibrium positions, linked to C atoms. The vibrations display an appreciable anharmonicity, as derived from comparison between kinetic and potential energy, as well as between vibrational energy for hydrogen and deuterium. On the other side, adatom motion has been studied by quantum transition-state theory. At room temperature, quantum effects are found to enhance the hydrogen diffusivity on the graphene sheet by a factor of 20.
description: 8 pages, 7 figures
The variable 6307A emission line in the spectrum of Eta Carinae: blueshifted [S III] 6313A from the interacting winds
Creators: name: Gull, T. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The 6307A emission line in the spectrum of Eta Car (Martin et al. 2006) is blue-shifted [S III] 6313A emission originating from the outer wind structures of the massive binary system. We realized the identification while analyzing multiple forbidden emission lines not normally seen in the spectra of massive stars. The high spatial and moderate spectral resolutions of HST/STIS resolve forbidden lines of Fe+, N+, Fe++, S++, Ne++ and Ar++ into spatially and velocity-resolved rope-like features originating from collisionally-excited ions photo-ionized by UV photons or collisions. While the [Fe II] emission extends across a velocity range of +/-500 km/s out to 0."7, more highly ionized forbidden emissions are systematically blue-shifted (-500 to +200 km/s) and extend only to 0."4. The [Fe II] defines the outer regions of the massive primary wind. The [N II], [Fe III] emission define the the outer wind interaction regions directly photo-ionized by far-UV radiation. Variations in emission of [S III] 9533A, 9071A and 6313A suggest density ranges of 10^6 to 10^10 cm^-3 for electron temperatures ranging from 8,000 to 13,000K. Mapping the temporal changes of the emission structure at critical phases of the 5.54-year period will provide important diagnostics of the interacting winds.
description: 15 pages. accepted, PASP
Giving electrons a ride: nanomechanical electron shuttles
Creators: name: Moskalenko, A. V.
name: Gordeev, S. N.
name: Koentjoro, O. F.
name: Raithby, P. R.
name: French, R. W.
name: Marken, F.
name: Savel'ev, S. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Nanomechanical shuttles transferring small groups of electrons or even individual electrons from one electrode to another offer a novel approach to the problem of controlled charge transport. Here, we report the fabrication of shuttle-junctions consisting of a 20 nm diameter gold nanoparticle embedded within the gap between two gold electrodes. The nanoparticle is attached to the electrodes through a monolayer of flexible organic molecules which play the role of springs so that when a sufficient voltage bias is applied, then nanoparticle starts to oscillate transferring electrons from one electrode to the other. Current-voltage characteristics for the fabricated devices have been measured and compared with the results of our computer simulations.
description: 11 pages, 4 figures
The Equation of State of the Intergalactic Medium After Hydrogen Reionization
Creators: name: Furlanetto, Steven
name: Oh, S. Peng
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use an analytic model to study how inhomogeneous hydrogen reionization affects the temperature distribution of the intergalactic medium (IGM). During this process, the residual energy of each ionizing photon is deposited in the IGM as heat, increasing its temperature to 20,000-30,000 K; subsequent expansion of the Universe then cools the gas. Because reionization most likely proceeds from high to low densities, underdense voids are ionized last, have less time to cool, and are (on average) warmer than mean-density gas immediately after reionization is complete (an "inverted" equation of state). From this initial configuration, the low-density gas cools quickly and eventually returns to a more normal equation of state. The rapidly evolving temperature introduces systematic uncertainties in measurements of the ionizing background at z~6. For example, late reionization implies rapid cooling, so that the ionizing background would have to evolve even more rapidly at z ~5-6 than typically claimed. This degeneracy is difficult to disentangle, because the Lyman-alpha forest probes only a narrow range in densities (over which the gas is nearly isothermal). However, higher Lyman-series transitions probe wider density ranges, sampling different effective temperatures, and offer a new way to measure the IGM equation of state that should work where nearly saturated absorption precludes other methods. This will help to separate evolution in temperature from that in the ionizing background. While more detailed study with hydrodynamic simulations is needed, we show that such measurements could potentially distinguish early and late reionization using only a handful of lines of sight.
description: 11 pages, 6 figures, submitted to ApJ
Events of August '91 as an Expression of Political Disobedience in the Process of Shaping Civil Conduct
Creators: name: Jach, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: Civil disobedience is the attitude which in the 20th century proved to be the only effective form of resistance to authoritarian regimes. So it was in the case of the events of August '91 when the Soviet society objected to the activities of the State Committee on the State of Emergency. It would not have been possible without the reform programme known as perestroika initiated by the last USSR leader Mikhail Gorbachev. Thanks to perestroika and the accompanying glasnost-transparency of sociopolitical life-the previously apathetic and alienated Soviet society felt responsible for their own life and for the fate of the State. By opposing the rebels through pas sive resistance, the citizens proved to the leaders of their own country, to the world, and above all, to themselves that they were aware of their rights and responsibilities. The process of sociopolitical socialization stimulated the development of civil society in the Soviet Union.
Constructing new optimal entanglement witnesses
Creators: name: Chruscinski, Dariusz
name: Pytel, Justyna
name: Sarbicki, Gniewomir
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide a new class of indecomposable entanglement witnesses. In 4 x 4 case it reproduces the well know Breuer-Hall witness. We prove that these new witnesses are optimal and atomic, i.e. they are able to detect the "weakest" quantum entanglement encoded into states with positive partial transposition (PPT). Equivalently, we provide a new construction of indecomposable atomic maps in the algebra of 2k x 2k complex matrices. It is shown that their structural physical approximations give rise to entanglement breaking channels. This result supports recent conjecture by Korbicz et. al.
description: 9 pages
ENLIGHT RISE - Deliverable 4.1 - Networking Event for Early Career Researchers #1
Creators: name: ENLIGHT RISE WP4-Early career researcher working group
Publisher: name: Zenodo
Year: 2022
Subjects: European universities alliance
Early career researcher
Networking
Leadership

description: The ENLIGHT “Research and Innovation agenda with and for Society” (RISE) project aims at establishing foundations and initiating implementation of a common research and innovation (R&I) agenda within the ENLIGHT European University Alliance.

Work package 4 has two specific projects. 4.1 To plan a series of events to support networking/leadership skills for early career researchers (ECRs) and 4.2 is the Researcher Assessment working group.

The first event, for 4.1 work package, was held on Tuesday 25th October 2022 between 12:00-14:00 CET, entitled ‘Networking Skills for Early Career Researchers’ and was held online.

Professor Jane Walsh, University of Galway, and Dr. Janka Kottulová, Comenius University Bratislava, were the guest presenters.

Version approved by the European Commission.
Resolving long-range spatial correlations in jammed colloidal systems using photon correlation imaging
Creators: name: Duri, Agnes
name: Sessoms, David A.
name: Trappe, Veronique
name: Cipelletti, Luca
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We introduce a new dynamic light scattering method, termed photon correlation imaging, which enables us to resolve the dynamics of soft matter in space and time. We demonstrate photon correlation imaging by investigating the slow dynamics of a quasi two-dimensional coarsening foam made of highly packed, deformable bubbles and a rigid gel network formed by dilute, attractive colloidal particles. We find the dynamics of both systems to be determined by intermittent rearrangement events. For the foam, the rearrangements extend over a few bubbles, but a small dynamical correlation is observed up to macroscopic length scales. For the gel, dynamical correlations extend up to the system size. These results indicate that dynamical correlations can be extremely long-ranged in jammed systems and point to the key role of mechanical properties in determining their nature.
description: Published version (Phys. Rev. Lett. 102, 085702 (2009)) The Dynamical Activity Mapsprovided as Supplementary Online Material are also available on http://w3.lcvn.univ-montp2.fr/~lucacip/dam/movies.htm
ENLIGHT RISE - Deliverable 4.1 - Networking Event for Early Career Researchers #1
Creators: name: ENLIGHT RISE WP4-Early Career Researcher Working Group
Publisher: name: Zenodo
Year: 2022
Subjects: European universities alliance
Early career researcher
Networking
Leadership

description: The ENLIGHT “Research and Innovation agenda with and for Society” (RISE) project aims at establishing foundations and initiating implementation of a common research and innovation (R&I) agenda within the ENLIGHT European University Alliance. Work package 4 has two specific projects. 4.1 To plan a series of events to support networking/leadership skills for early career researchers (ECRs) and 4.2 is the Researcher Assessment working group. The first event, for 4.1 work package, was held on Tuesday 25th October 2022 between 12:00-14:00 CET, entitled ‘Networking Skills for Early Career Researchers’ and was held online. Professor Jane Walsh, University of Galway, and Dr. Janka Kottulová, Comenius University Bratislava, were the guest presenters.
The effect of local motor loads on power system stability.
Creators: name: Prior, Bruce George
Publisher: name: University of British Columbia
Year: 2011

description: The effect of local motor loads on power system stability is investigated. The power system consists of a synchronous generator supplying a large system through a long transmission line. The loads studied are an induction motor, a synchronous motor, and the combination of the two, although a general case of any number of local induction and synchronous motor leads can be easily formulated. Stability is determined by observing the response of the generator and the motors of the system with a fault at the transmission line. The response is calculated from the mathematical model and is- also observed from tests on a dynamic power system model in the laboratory. It is found from the studies that all the local motor loads improve the stability of a power system.
Additional file 1 of Elevated gamma-glutamyl transferase has a non-linear association with incident non-alcoholic fatty liver disease in the non-obese Chinese population: a secondary retrospective study
Creators: name: Wu, Liling
name: Zhang, Man
name: Hu, Haofei
name: Wan, Qijun
Publisher: name: figshare
Year: 2021
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Additional file 1.
The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics
Creators: name: Sion, Edward M.
name: Holberg, Jay B.
name: Oswalt, Terry D.
name: McCook, George P.
name: Wasatonic, Richard
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the kinematical properties, distribution of spectroscopic subtypes, stellar population subcomponents of the white dwarfs within 20 pc of the sun. We find no convincing evidence of halo white dwarfs in the total 20 pc sample of 129 white dwarfs nor is there convincing evidence of genuine thick disk subcomponent members within 20 parsecs. Virtually the entire 20 pc sample likely belongs to the thin disk. The total DA to non-DA ratio of the 20 pc sample is 1.6, a manifestation of deepening envelope convection which transforms DA stars with sufficiently thin H surface layers into non-DAs. The addition of 5 new stars to the 20 pc sample yields a revised local space density of white dwarfs of $4.9\pm0.5 \times 10^{-3}$ M$_{\sun}$/yr and a corresponding mass density of $3.3\pm0.3 \times 10^{-3}$ M$_{\sun}$/pc$^{3}$. We find that at least 15% of the white dwarfs within 20 parsecs of the sun (the DAZ and DZ stars) have photospheric metals that possibly originate from accretion of circumstellar material (debris disks) around them. If this interpretation is correct, this suggests the possibility that the same percentage have planets or asteroid-like bodies orbiting them.
description: Accepted for publication in The Astronomical Journal
Działalność organizacji pozarządowych w Rosji w latach 90. XX wieku jako wyraz interioryzacji założeń demokracji w zakresie partycypacji obywatelskiej
Creators: name: Jach, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: Działalność organizacji pozarządowych w Rosji w latach 90. XX wieku jako wyraz interioryzacji założeń demokracji w zakresie partycypacji obywatelskiej, "Studia Wschodnioeuropejskie", Nr 9/2018, ss. 65-81
New Ansatz for Metric Operator Calculation in Pseudo-Hermitian Field Theory
Creators: name: Shalaby, Abouzeid M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, a new ansatz is introduced to make the calculations of the metric operator in Pseudo-Hermitian field theory simpler. The idea is to assume that the metric operator is not only a functional of the field operators $ϕ$ and its conjugate field $π$ but also on the field gradient $\nablaϕ$. Rather than the locality of the metric operator obtained, the ansatz enables one to calculate the metric operator just once for all dimensions of the space-time. We calculated the metric operator of the $iϕ^{3}$ scalar field theory up to first order in the coupling. The higher orders can be conjectured from their corresponding operators in the quantum mechanical case available in the literature. We assert that, the calculations existing in literature for the metric operator in field theory are cumbersome and are done case by case concerning the dimension of space-time in which the theory is investigated. Moreover, while the resulted metric operator in this work is local, the existing calculations for the metric operator leads to a non-local one. Indeed, we expect that the new results introduced in this work will greatly lead to the progress of the studies in Pseudo-Hermitian field theories where there exist a lack of such kind of studies in the literature. In fact, with the aid of this work a rigorous study of a $\mathcal{PT}$-symmetric Higgs mechanism can be reached.
description: In this version, for a more illustrative presentation, we used the i\phi^3 theory to show that the new ansatz introduced is applicable
title: Dr. Robert J.T. Joy, MD, FACP, COL, MC, USA (Ret.) Oral History Interview Transcript Part 1
Creators: name: Uniformed Services University of the Health Sciences
Publisher: name: University Archives, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
Year: 2005
Subjects: classificationCode: 3
subject: FOS: Medical and health sciences
classificationCode: 6.1
subject: FOS: History and archaeology

description: USU Oral History Interview Transcript
Dr. Robert J.T. Joy, MD, FACP, COL, MC, USA (Ret.)
First Chairman of the Department of Military Medicine & History
First Commandant of Students
First Professor and Chair, Department of Medical History
Emeritus Professor, Department of Medical
c. 2005
Interviewed by Karen Caron
Three dimensional structure of penumbral filaments from Hinode observations
Creators: name: Puschmann, K. G.
name: Cobo, B. Ruiz
name: Pillet, V. Martinez
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse spectropolarimetric observations of the penumbra of the NOAA AR 10953 at high spatial resolution (0.3"). The full Stokes profiles of the Fe I lines at 630.1 nm and 630.2 nm have been obtained with the Solar Optical Telescope (SOT) on board the Hinode satellite. The data have been inverted by means of the SIR code, deriving the stratifications of temperature, line of sight velocity, and the components of the magnetic field vector in optical depth. In order to evaluate the gas pressure and to obtain an adequate geometrical height scale, the motion equation has been integrated for each pixel taking into account the terms of the Lorentz force. To establish the boundary condition, a genetic algorithm has been applied. The final resulting magnetic field has a divergence compatible with 0 inside its uncertainties. First analyses of the correlation of the Wilson depression with velocity, temperature, magnetic field strength, and field inclination strongly support the uncombed penumbral model proposed by Solanki & Montavon (1993).
description: 6 pages, 3 figures, conference proceeding: SEA meeting 2008, Santander, Spain
Analysis of hydrogen-rich magnetic white dwarfs detected in the Sloan Digital Sky Survey
Creators: name: Kulebi, B.
name: Jordan, S.
name: Euchner, F.
name: Gaensicke, B.
name: Hirsch, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We model the structure of the surface magnetic fields of the hydrogen-rich white dwarfs in the SDSS. We have calculated a grid of state-of-the-art theoretical optical spectra of hydrogen-rich magnetic white dwarfs with magnetic field strengths between 1 MG and 1200 MG for different angles, and for effective temperatures between 7000 K and 50000 K. We used a least-squares minimization scheme with an evolutionary algorithm in order to find the magnetic field geometry best fitting the observed data. We used simple centered dipoles or dipoles which were shifted along the dipole axis to model the coadded SDSS fiber spectrum of each object. We have analysed the spectra of all known magnetic DAs from the SDSS (97 previously published plus 44 newly discovered) and also investigated the statistical properties of magnetic field geometries of this sample. The total number of known magnetic white dwarfs already more than tripled by the SDSS and more objects are expected from a more systematic search. The magnetic fields span a range between ~1 and 900 MG. Our results further support the claim that Ap/Bp population is insufficient in generating the numbers and field strength distributions of the observed MWDs, and either another source of progenitor types or binary evolution is needed. Moreover clear indications for non-centered dipoles exist in about ~50% of the objects which is consistent with the magnetic field distribution observed in Ap/Bp stars.
description: 15 pages, accepted for publication in A&A. For online version with full appendix figures, see http://www.ari.uni-heidelberg.de/mitarbeiter/bkulebi/papers/12570_online.pdf
A Binary Control Chart to Detect Small Jumps
Creators: name: Steland, Ansgar
name: Rafalowicz, Ewaryst
Publisher: name: arXiv
Year: 2010
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The classic N p chart gives a signal if the number of successes in a sequence of inde- pendent binary variables exceeds a control limit. Motivated by engineering applications in industrial image processing and, to some extent, financial statistics, we study a simple modification of this chart, which uses only the most recent observations. Our aim is to construct a control chart for detecting a shift of an unknown size, allowing for an unknown distribution of the error terms. Simulation studies indicate that the proposed chart is su- perior in terms of out-of-control average run length, when one is interest in the detection of very small shifts. We provide a (functional) central limit theorem under a change-point model with local alternatives which explains that unexpected and interesting behavior. Since real observations are often not independent, the question arises whether these re- sults still hold true for the dependent case. Indeed, our asymptotic results work under the fairly general condition that the observations form a martingale difference array. This enlarges the applicability of our results considerably, firstly, to a large class time series models, and, secondly, to locally dependent image data, as we demonstrate by an example.
AN APPRAISAL OF THE NATIONAL SOCIAL INVESTMENT PROGRAMME AND ECONOMIC DEVELOPMENT IN NIGERIA:   A CASE STUDY OF BAYELSA STATE, 2015-2022
Creators: name: ISELEMA, GBARANBIRI
Publisher: name: ZAP Journals
Year: 2023
Subjects: NSIP
N-Power
GEEP
NHGSFP
CCT
Economic Development

description: This study carried out an appraisal of the National Social Investment Programme and Economic Development in Nigeria: A Case Study of Bayelsa State, 2015-2022. The study adopted the correlational research design to enable the researcher to establish the relationship between the dependent and independent variables. The target population for the study is estimated to be around two hundred and fifty thousand children, youths and women (250,000) in Bayelsa State. Taro Yamane formula was used to determine the sample size of 399 drawn from the total population. An instrument titled; “Appraisal of National Social Investment Programme and Social Economic Development Questionnaire” (ANSIPSEDQ) was developed to elicit data from respondents which were validated and its consistency tested using Cronbach Aphla and the result yielded 0.86. Out of the 399 (100%) questionnaires distributed, 382 (95.7%) were returned valid, while 7(4.3%) copies of the questionnaire were discarded due to filling errors. Pearson Product Moment Correlation (PPMC) was used to test the null hypotheses at a 0.05 level of significance with the aid of Statistical Package for Social Science (SPSS) Version 26.0. Findings from the study revealed that the National Social Investment Programme through the N-Power Programme, Government Enterprise and Empowerment Programme, National Home-Grown School Feeding Programme and Conditional Cash Transfer enhanced economic development in Nigeria. Based on the findings, it was concluded that National Social Investment Programmes, enhance economic development in Nigeria: a case study of Bayelsa State, 2015-2022. The study recommended, among others, that the federal government of Nigeria should stop the delay in payment of the N-Power stipend to avoid its negative effect on human capital and economic development, combat high illiteracy, low education, lack of skills training, and scarce facilities and resources among children, youths and women in Nigeria for effective implementation and actualization of the Government Enterprise and Empowerment Programme goals
Statistics of Resonances in One Dimensional Continuous Systems
Creators: name: Feinberg, Joshua
Publisher: name: arXiv
Year: 2009
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the average density of resonances (DOR) of a disordered one-dimensional continuous open system. The disordered system is semi-infinite, with white-noise random potential, and it is coupled to the external world by a semi-infinite continuous perfect lead. Our main result is an integral representation for the DOR which involves the probability density function of the logarithmic derivative of the wave function at the contact point.
description: latex, 8 pages, no figures; original material, based on an invited lecture at the Homi Bhabha Centenary conference on "Non-Hermitian operators in quantum physics", Bhaba Atomic Research Center, Mumbai, January 2009
Analytic smoothness effect of solutions for spatially homogeneous Landau equation
Creators: name: Chen, Hua
name: Li, Wei-Xi
name: Xu, Chao-Jiang
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B65, 76P05

description: In this paper, we study the smoothness effect of Cauchy problem for the spatially homogeneous Landau equation in the hard potential case and the Maxwellian molecules case. We obtain the analytic smoothing effect for the solutions under rather weak assumptions on the initial datum.
description: 16 pages
Momentum-resolved single-particle spectral function for TiOCl from a combination of density functional and variational cluster calculations
Creators: name: Aichhorn, M.
name: Saha-Dasgupta, T.
name: Valenti, R.
name: Glawion, S.
name: Sing, M.
name: Claessen, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present results for the momentum-resolved single-particle spectral function of the low-dimensional system TiOCl in the insulating state, obtained by a combination of ab initio Density Functional Theory (DFT) and Variational Cluster (VCA) calculations. This approach allows to combine a realistic band structure and a thorough treatment of the strong correlations. We show that it is important to include a realistic two-dimensional band structure of TiOCl into the effective strongly-correlated models in order to explain the spectral weight behavior seen in angle-resolved photoemission (ARPES) experiments. In particular, we observe that the effect of the interchain couplings is a considerable redistribution of the spectral weight around the Gamma point from higher to lower binding energies as compared to a purely one-dimensional model treatment. Hence, our results support a description of TiOCl as a two-dimensional compound with strong anisotropy and also set a benchmark on the spectral features of correlated coupled-chain systems.
description: 9 pages, 7 figures, version to appear in Phys. Rev. B
Cholestrol esterification as a regulator of inflammation in lung injury
Creators: name: Stevenson, Emily Rose
Publisher: name: No Publisher Supplied
Year: 2023

description: Macrophages are the first line of defense responsible for the proper initiation of the inflammatory response and subsequent resolution of lung injury. Pulmonary macrophages exist in a unique, innately lipid-rich environment, which in times of injury becomes further enriched with lipid through cellular debris. Excessive accumulation of lipids in macrophages is the hallmark of foam cell formation in cardiovascular disease, however, little is known about the lipid-laden macrophage phenotype in the lung. We have postulated that this lipid-laden macrophage phenotype contributes to both acute and chronic lung injury, and the genesis of this cell type can be prevented by limiting lipid droplet formation within the cell. Acyl coenzyme A acyltransferase 1 (ACAT-1), an enzyme responsible for cholesterol esterification, is a critical regulator of intracellular lipid droplet formation and is highly expressed in macrophages. As such, it is proposed that ACAT-1 is critical to lipid-laden macrophage formation and that persistence of this cell type exacerbates lung injury. The role of pulmonary ACAT-1 inhibition via pharmacological intervention in mouse models of both acute and chronic lung injury were investigated. Furthermore, the role of this enzyme in macrophages was assessed through the use of a myeloid-specific ACAT-1 knockout mouse. Macrophage activation and cellular metabolism were investigated in vitro using both ACAT-1 inhibitor-treated cells and cells derived from the myeloid-specific ACAT-1 knockout mouse. The studies presented within support the role of cholesterol esterification in the regulation of lipid metabolism, macrophage phenotypic switching, and metabolism, all of which contribute to the innate immune response mounted to bleomycin-induced injury. Though lipid homeostasis in the cell is vital to macrophage function, these data point to modulation of lipid species in macrophages as a potential therapeutic target in different pathologies. These studies add to the literature detailing the complexity of immunometabolism and further illuminate the relationship between metabolism, cell phenotype, and cell signaling in innate immunity.
Generalized matrix inverses and the generalized Gauss-Markoff theorem
Creators: name: Ang, Siow-Leong
Publisher: name: University of British Columbia
Year: 2011

description: In this thesis we present the generalization of the Moore-Penrose pseudo-inverse in the sense that it satisfies the following conditions. Let x be an m × n matrix of rank r , and let u and v be symmetric positive semi-definite matrices of order m and n and rank s and t respectively, such that s.t ≥ r , and column space of x ⊂ column space of u row space of x⊂ row space of v. Then x≠ is called the generalized inverse of x with respect to u and v if and only if it satisfies : (i) xx≠x = x (ii) x≠xx≠= x≠ (iii) (xx≠)’ = u⁺xx≠u (iv) (x≠x)' = v⁺x≠xv , where U⁺ and V⁺ are the Moore-Penrose pseudo-inverses of U and V respectively. We further use this result to generalize the fundamental Gauss-Markoff theorem for linear estimation, and we also use it in the minimum mean square error estimation of the general model y = Xβ + ε , that is, we allow the covariance matrix of y to be symmetric positive semi-definite.
Heavy quark in an expanding plasma in AdS/CFT
Creators: name: Giecold, G. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the Janik-Peschanski dual to a Bjorken flow, a Langevin equation is derived for a heavy quark in an expanding N = 4 supersymmetric Yang-Mills plasma. Such a plasma is characterized by a proper-time dependence of the temperature and corresponds to a system out of equilibrium. The analysis first focuses on a quark at rest in the plasma comoving frame. The case of a quark moving across a longitudinally expanding plasma is then considered. The two-point functions for the random noise acting on such heavy quark probes are computed.
description: 17 pages. v2: references added; improved comments on the Schwinger-Keldysh formalism
Eternity and the cosmological constant
Creators: name: Álvarez, Enrique
name: Vidal, Roberto
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The purpose of this paper is to analyze the stability of interacting matter in the presence of a cosmological constant. Using an approach based on the heat equation, no imaginary part is found for the effective potential in the presence of a fixed background, which is the n-dimensional sphere or else an analytical continuation thereof, which is explored in some detail.
description: 45 pages, 6 figures
GLOBAL MANAGERIAL ISSUES AND THEIR EFFECT ON OPERATIONAL PERFORMANCE IN SELECTED FAST-FOOD FIRMS IN ABIA STATE
Creators: name: Adaobi, Nkeiruka Umeh
name: Obinna, Chukwudi Ezeagu
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Global Managerial Challenges, Organizational Performance

description: This study analysed the effect of global managerial challenges on organizational performance (A study of selected fast-food industry in Umuahia Abia state). The specific objectives included: (a) determine the effect of the leadership behaviour/styles on the survival of fast-foods in Abia State. (b) Examine the extent to which the management structure of fast-foods influences the sustainability of fast-foods in Abia State. (c) determine the effect of work conditions on the profitability of fast-foods in Abia State, and  (d) ascertain the effect of managerial competence on the effectiveness of fast-foods in Abia State. Survey research design was adopted. A total of 145 questionnaire was administered to the staff of selected fast-food industry in Umuahia Abia state. Frequency distribution and percentages was determined, the hypotheses were tested using regression analysis and Spearman correlation coefficients with the help of SPSS version 25.0. The findings indicate that; Leadership behaviour/styles has significant effect on the survival of Fast-foods in Abia State., Managerial structure has significant influence on the sustainability of Fast-foods in Abia State., Work conditions has significant effect on the profitability of Fast-foods in Abia state and Managerial competence has significant effect on the effectiveness of fast-foods in Abia State. The study recommended that; CEO/Manager of fast-food should possess good leadership behaviour/styles in order to improve on the survival of Fast-foods in Umuahia as initiating structure and consideration, motivation and vision, employee-oriented and production-oriented, coercion and motivation are variable tools for organizational survival. Finally, there is need to improve and continuously adjust to good and effective managerial structure to help carry out works and other responsibilities effectively and efficiently by employees of Fast-foods in Umuahia Abia state in other to foster maintain their sustainability.
Faster and better: a machine learning approach to corner detection
Creators: name: Rosten, Edward
name: Porter, Reid
name: Drummond, Tom
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The repeatability and efficiency of a corner detector determines how likely it is to be useful in a real-world application. The repeatability is importand because the same scene viewed from different positions should yield features which correspond to the same real-world 3D locations [Schmid et al 2000]. The efficiency is important because this determines whether the detector combined with further processing can operate at frame rate. Three advances are described in this paper. First, we present a new heuristic for feature detection, and using machine learning we derive a feature detector from this which can fully process live PAL video using less than 5% of the available processing time. By comparison, most other detectors cannot even operate at frame rate (Harris detector 115%, SIFT 195%). Second, we generalize the detector, allowing it to be optimized for repeatability, with little loss of efficiency. Third, we carry out a rigorous comparison of corner detectors based on the above repeatability criterion applied to 3D scenes. We show that despite being principally constructed for speed, on these stringent tests, our heuristic detector significantly outperforms existing feature detectors. Finally, the comparison demonstrates that using machine learning produces significant improvements in repeatability, yielding a detector that is both very fast and very high quality.
description: 35 pages, 11 figures
Theoretical approaches in the study of the non-governmental, non-commercial sector in modern Russia
Creators: name: Jach, Anna
Publisher: name: figshare
Year: 2021
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: Theoretical approaches in the study of the non-governmental, non-commercial sector in modern Russia, "Politeja", 5 (62), 2019, ss. 21-32;
Quantifying the transverse-electric-dominant 260 nm emission from molecular beam epitaxy-grown GaN-quantum-disks embedded in AlN nanowires: a comprehensive optical and morphological characterization
Creators: name: Subedi, Ram Chandra
name: Min, Jung-Wook
name: Mitra, Somak
name: Li, Kuang-hui
name: Ajia, Idris
name: Stegenburgs, Edgars
name: Anjum, Dalaver
H.
name: Conroy, Michele
name: Moore, Kalani
name: Bangert, Ursel
name: Roqan, Iman S.
name: Ng, Tien Khee
name: Ooi, Boon S.
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 51
subject: Physical sciences
subject: FOS: Physical sciences

description: There has been a relentless pursuit of transverse electric (TE)-dominant deep ultraviolet (UV) optoelectronic devices for efficient surface emitters to replace the environmentally unfriendly mercury lamps. To date, the use of the ternary AlGaN alloy inevitably has led to transverse magnetic (TM)-dominant emission, an approach that is facing a roadblock. Here, we take an entirely different approach of utilizing a binary GaN compound semiconductor in conjunction with ultrathin quantum disks (QDisks) embedded in AlN nanowires (NWs). The growth of GaN QDisks is realized on a scalable and low-cost Si substrate using plasma-assisted molecular beam epitaxy as a highly controllable monolayer growth platform. We estimated an internal quantum efficiency of ∼81% in a wavelength regime of ∼260 nm for these nanostructures. Additionally, strain mapping obtained by high-angle annular dark-field scanning transmission electron microscopy is studied in conjunction with the TE and TM modes of the carrier recombination. Moreover, for the first time, we quantify the TE and TM modes of the PL emitted by GaN QDisks for deep-UV emitters. We observed nearly pure TE-polarized photoluminescence emission at a polarization angle of ∼5°. This work proposes highly quantum-confined ultrathin GaN QDisks as a promising candidate for deep-UV vertical emitters.
The¬¨‚Ä†simplification¬¨‚Ä†of¬¨‚Ä†complex¬¨‚Ä†notation¬¨‚Ä†presented¬¨‚Ä†in¬¨‚Ä†aleatoric¬¨‚Ä†forms
Creators: name: McIntyre, Scott
Publisher: name: University Of Tasmania
Year: 2023

description: The simplification of complex notation presented in aleatoric forms This project seeks to find solutions to questions of complex musical notation and whether they can be simplified by using techniques of limited-aleatory. A folio of compositions has been written, constituting eighty percent of this project. These compositions demonstrate that by using limited-aleatoric notation developed by Witold Lutoslawski (1913-1994), that I can achieve a complex outcome than if I had used a more complicated rhythmic language. The exegesis constitutes twenty percent of the thesis with the remaining technique. As the musical language of composition grew more complex during the 20th century there also developed the need for ever more complex notational systems. The performers' often-improvisatory input was abandoned in favour of a strict control from the composer in a hyper-detailed notation. As notation of melody, harmony and rhythm became more complex, the performance outcome often sounded as a 'notated improvisation' wherein all sense of metre and melody seemed to be lost. This led inevitably to aleatoric practices in the 1960s of notating more simple ideas but arranging them to create more complex outcomes. In my own composition the need for hyper-notated scores has given way to simpler forms where an element of chance has been introduced at the point of performance of the score. The compositions I write do not strictly fall into total forms of chance or indeterminacy as I still exercise a level of control in the organisation of structure, pitch and time. By allowing a degree of aleatory or randomness into the score there is a room for a simpler notation working to achieve a blurring of melody, harmony and rhythm that occurred in many of my earlier complex scores. In this exegesis I will show how examples of extreme notational complexity and simpler notation through aleatoric techniques (although at times graphically experimental) achieve the same ends in compositional and sonic complexity to the performer and listener.
Edge-on disk galaxies in the SDSS DR6: Fractions of bulgeless and other disk galaxies
Creators: name: Kautsch, S. 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: The aim of this study is to determine the fractions of different spiral galaxy types, especially bulgeless disks, from a complete and homogeneous sample of 15127 edge-on disk galaxies extracted from the sixth data release from the Sloan Digital Sky Survey. The sample is divided in broad morphological classes and sub types consisting of galaxies with bulges, intermediate types and galaxies which appear bulgeless. A small fraction of disky irregulars is also detected. The morphological separation is based on automated classification criteria which resemble the bulge sizes and the flatness of the disks. Each of these broad classes contains about 1/3 of the total sample. Using strict criteria for selecting pure bulgeless galaxies leads to a fraction of 15% of simple disk galaxies. We compare this fraction to other galaxy catalogs and find an excellent agreement of the observed frequency of bulgeless galaxies. Although the fraction of simple disk galaxies in this study does not represent a cosmic fraction of bulgeless galaxies, it shows that the relative abundance of pure disks is comparable to other studies and offers a profound value of the frequency of simple disks in the local Universe. This fraction of simple disks emphasizes the challenge for formation and evolution models of disk galaxies since these models are hard pressed to explain the observed frequency of these objects.
description: 7 pages, 8 figures
title:  Sustainability and Market Failure: Regulation v. Competition
Creators: name: Muscolo, Gabriella
Publisher: name: Roma Tre University
publisherIdentifier: https://ror.org/05vf0dg29
publisherIdentifierScheme: ROR
Year: 2024

description: The paper deals with the trade-off between competition enforcement and regulation when it comes to sustainability policies. It starts from public policy analysis in its traditional, three steps, economic approach: identifying the economic problem and market failures; outlining the options in solutions; balancing the pros and cons of regulation versus competition enforcement, in the light of the initiatives on sustainable competition already taken by National Competition Authorities. The articles conclude on a focal role for antitrust law and policy in the ecological transition envisaged by the Green Deal, as far as dynamic competition promotes green innovations.
description: Roma Tre Law Review – 01/2024
Microbiological deposition of manganese in freshwater distribution systems
Creators: name: Tyler, PA
Publisher: name: University Of Tasmania
Year: 2023

description: The occurrence, in pipelines carrying freshwater, of a deposit containing 20-40% manganese, has been investigated in Tasmania. Heavy deposits form rapidly in pipelines carrying Lake King William water while those carrying Great Lake water remain free from deposits over long periods. An apparatus was designed for studying the problem on a laboratory scale and it was proved experimentally that the manganese deposits are initiated by microorganisms. The lack of deposits in pipelines carrying Great Lake water results from lack of available manganese in the water, since addition of soluble manganese causes a deposit to form.
ENLIGHT RISE - Deliverable 5.1 - Map of academy-industry partnerships
Creators: name: ENLIGHT RISE WP5-Roadmap for an ENLIGHT European Innovation District
Publisher: name: Zenodo
Year: 2022
Subjects: European universities alliance
Innovation

description: The report brings together a mapping of the academy-industry partnerships.  The objective is to identify synergies related to the UN-SDGs & ENLIGHT flagship challenges, available through the ENLIGHT R&I Observatory.

Version approved by the European Commission.
The construction of a reliable potential for GeO2 from first-principles
Creators: name: Marrocchelli, D.
name: Salanne, M.
name: Madden, P. A.
name: Simon, C.
name: Turq, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The construction of a reliable potential for GeO2, from first-principles, is described. The obtained potential, which includes dipole polarization effects, is able to reproduce all the studied properties (structural, dynamical and vibrational) to a high degree of precision with a single set of parameters. In particular, the infrared spectrum was obtained with the expression proposed for the dielectric function of polarizable ionic solutions by Weis et al. [J.M. Caillol, D. Levesque and J.J. Weis, J. Chem. Phys. 91, 5544 (1989)]. The agreement with the experimental spectrum is very good, with three main bands that are associated to tetrahedral modes of the GeO2 network. Finally, we give a comparison with a simpler pair-additive potential.
description: 9 pages, 8 figures