cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New Analytical Results for Poissonian and non-Poissonian Statistics of Cosmic Voids
Creators: name: Zaninetti, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Stereology allows shifting from the 3D distribution of the volumes of Poissonian Voronoi Diagrams to their 2D cross-sections. The basic assumption is that the 3D statistics of the volumes of the voids in the local Universe has a distribution function of the gamma-type. The standard rule of conversion from 3D volumes to 2D circles, adopting the standard rules of stereology, produces a new probability density function of the radii which contains the Meijer $G$-function. A non-Poissonian distribution of volumes is also considered. The distribution of the 3D radii of the Sloan Digital Sky Survey Data Release 7 is best fitted by a non-Poissonian distribution in volumes as given by the Kiang function with argument of about two.
description: 21 pages and 8 figures
The formation and stability of molybdenum-antimony and tungsten-antimony ternary oxides Sb 2MO 6, Sb 2M 2O 9, Sb 2Mo 3O 12 and Sb 4MO 9 in the gas phase (M = Mo, W). Quantum chemical and mass spectrometric studies
Creators: name: Berezovskaya, E.
name: Milke, E.
name: Binnewies, Michael
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: Gasphase
subject: Quantum chemical
subject: Quantum chemical calculations
subject: Structural data
subject: Ternary oxides
subject: Thermodynamic data
subject: Gases
subject: Mass spectrometry
subject: Molybdenum
subject: Molybdenum oxide
subject: Quantum chemistry
subject: Tungsten
subject: Antimony
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The ternary oxides Sb 2MO 6, Sb 2M 2O 9, Sb 4MO 9 (M = Mo, W) and Sb 2Mo 3O 12 were detected in the gas phase by means of mass spectrometry (MS). These gaseous oxides are reported for the first time. Thermodynamic data was obtained experimentally and confirmed by quantum chemical (QC) calculations. In addition, structural data on these molecules was obtained. The ionisation potentials (IP) were also determined both experimentally and theoretically. © 2012 The Royal Society of Chemistry.
Quantum-state resolved bimolecular collisions of velocity-controlled OH with NO radicals
Creators: name: Kirste, Moritz
name: Wang, Xingan
name: Schewe, H. Christian
name: Meijer, Gerard
name: Liu, Kopin
name: van der Avoird, Ad
name: Janssen, Liesbeth M. C.
name: Gubbels, Koos B.
name: Groenenboom, Gerrit C.
name: van de Meerakker, Sebastiaan Y. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Whereas atom-molecule collisions have been studied with complete quantum state resolution, interactions between two state-selected molecules have proven much harder to probe. Here, we report the measurement of state-resolved inelastic scattering cross sections for collisions between two open-shell molecules that are both prepared in a single quantum state. Stark-decelerated OH radicals were scattered with hexapole-focused NO radicals in a crossed beam configuration. Rotationally and spin-orbit inelastic scattering cross sections were measured on an absolute scale for collision energies between 70 and 300 cm$^{-1}$. These cross sections show fair agreement with quantum coupled-channels calculations using a set of coupled model potential energy surfaces based on ab initio calculations for the long-range non-adiabatic interactions and a simplistic short-range interaction. This comparison reveals the crucial role of electrostatic forces in complex molecular collision processes.
Total synthesis of noricumazole B establishes D-arabinose as glycan unit
Creators: name: Barbier, Jenny
name: Gerth, Klaus
name: Jansen, Rolf
name: Kirschning, Andreas
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: D-arabinose
subject: Myxobacteria
subject: Secondary metabolites
subject: Total synthesis
subject: Positive ions
subject: Chemistry
subject: arabinose
subject: isocoumarin derivative
subject: oxazole derivative
subject: article
subject: chemical structure
subject: chemistry
subject: metabolism
subject: Myxococcales
subject: synthesis
subject: Arabinose
subject: Isocoumarins
subject: Molecular Structure
subject: Oxazoles
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The total synthesis of noricumazole B, a secondary metabolite from myxobacteria, was achieved. It established the glycan moiety to be D-α-arabinoside. © The Royal Society of Chemistry 2012.
Small-Scale, Local Production in Prince Georgeʼs County, MD
Creators: name: Brinley, Anna
name: Murnen, Lily
name: Nye, Kari
Publisher: name: Partnership for Action Learning in Sustainability (PALS)
Year: 2020
Subjects: National Center for Smart Growth
PALS
Sustainability
Maryland
Prince George's County
Master of Community Planning
Urban Studies and Planning
School of Architecture
Planning
Preservation Planning
Economic Development
Manufacturing
Policy
Community Engagement
Equity
Spring 2020
Bobby Boone

description: Final project for URSP788: Independent Study in Urban Studies and Planning (Spring 2020). University of Maryland, College Park.
description: Through their work with the National Center for Smart Growth at the University of Maryland (UMD), the Prince George’s County Planning Department commissioned this report from the university’s Partnership for Action Learning in Sustainability (PALS). PALS works with local jurisdictions throughout Maryland to identify projects and problems that can be taught through university courses where students focus on developing innovative, research-based solutions. Small-Scale Local Production is the result of a graduate urban planning and studies seminar initiated with the intent to evaluate the manufacturing and maker ecosystem in Prince George’s County. Building upon insights gained from previous studies in Prince George’s County, Washington, DC, Montgomery County, and Baltimore City, the course evolved to focus on zoning policy, programmatic support, and real estate analysis. This report centers small, production-based businesses as part of an inclusive economic development strategy for the County.
Packaging research artefacts with RO-Crate
Creators: name: Soiland-Reyes, Stian
name: Sefton, Peter
name: Crosas, Mercè
name: Castro, Leyla Jael
name: Coppens, Frederik
name: Fernández, José M.
name: Garijo, Daniel
name: Grüning, Björn
name: La Rosa, Marco
name: Leo, Simone
name: Carragáin, Eoghan Ó
name: Portier, Marc
name: Trisovic, Ana
name: RO-Crate Community
name: Groth, Paul
name: Goble, Carole
Publisher: name: Zenodo
Year: 2021

description: An increasing number of researchers support reproducibility by including pointers to and descriptions of datasets, software and methods in their publications. However, scientific articles may be ambiguous, incomplete and difficult to process by automated systems. In this paper we introduce RO-Crate, an open, community-driven, and lightweight approach to packaging research artefacts along with their metadata in a machine readable manner. RO-Crate is based on Schema.org annotations in JSON-LD, aiming to establish best practices to formally describe metadata in an accessible and practical way for their use in a wide variety of situations. An RO-Crate is a structured archive of all the items that contributed to a research outcome, including their identifiers, provenance, relations and annotations. As a general purpose packaging approach for data and their metadata, RO-Crate is used across multiple areas, including bioinformatics, digital humanities and regulatory sciences. By applying "just enough" Linked Data standards, RO-Crate simplifies the process of making research outputs FAIR while also contributes to enhancing research reproducibility. An RO-Crate for this article is available.
description: Preprint under consideration. Cite as arXiv:2108.06503v1 [cs.DL] https://doi.org/10.5281/zenodo.5146228
Weak convergence of complex-valued measure for bi-product path space induced by quantum walk
Creators: name: Konno, Norio
name: Segawa, Etsuo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, a complex-valued measure of bi-product path space induced by quantum walk is presented. In particular, we consider three types of conditional return paths in a power set of the bi-product path space (1) $Λ\times Λ$, (2) $Λ\times Λ'$ and (3) $Λ'\times Λ'$, where $Λ$ is the set of all $2n$-length ($n\in \mathbb{N}$) return paths and $Λ'(\subseteq Λ)$ is the set of all $2n$-length return paths going through $nx$ ($x\in [-1,1]$) at time $n$. We obtain asymptotic behaviors of the complex-valued measures for the situations (1)-(3) which imply two kinds of weak convergence theorems (Theorems 1 and 2). One of them suggests a weak limit of weak values.
description: 11 pages
A Hubble Space Telescope Survey of H2 Emission in the Circumstellar Environments of Young Stars
Creators: name: France, Kevin
name: Schindhelm, Rebecca
name: Herczeg, Gregory J.
name: Brown, Alexander
name: Abgrall, Herve
name: Alexander, Richard D.
name: Bergin, Edwin A.
name: Brown, Joanna M.
name: Linsky, Jeffrey L.
name: Roueff, Evelyne
name: Yang, Hao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The formation timescale and final architecture of exoplanetary systems are closely related to the properties of the molecular disks from which they form. Observations of the spatial distribution and lifetime of the molecular gas at planet-forming radii (r < 10 AU) are important for understanding the formation and evolution of exoplanetary systems. Towards this end, we present the largest spectrally resolved survey of H2 emission around low-mass pre-main sequence stars compiled to date. We use a combination of new and archival far-ultraviolet spectra from the COS and STIS instruments on the Hubble Space Telescope to sample 34 T Tauri stars (27 actively accreting CTTSs and 7 non-accreting WTTSs) with ages ranging from roughly 1-10 Myr. We observe fluorescent H2 emission, excited by LyA photons, in 100 of the accreting sources, including all of the transitional disks in our sample (CS Cha, DM Tau, GM Aur, UX Tau A, LkCa15, HD 135344B and TW Hya). The spatial distribution of the emitting gas is inferred from spectrally resolved H2 line profiles. Some of the emitting gas is produced in outflowing material, but the majority of H2 emission appears to originate in a rotating disk. For the disk-dominated targets, the H2 emission originates predominately at r < 3 AU. The emission line-widths and inner molecular radii are found to be roughly consistent with those measured from mid-IR CO spectra.
description: ApJ - accepted. 19 pages, 12 figures
Strong lensing, plane gravitational waves and transient flashes
Creators: name: Harte, Abraham I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Plane-symmetric gravitational waves are considered as gravitational lenses. Numbers of images, frequency shifts, mutual angles, and image distortion parameters are computed exactly in essentially all non-singular plane wave spacetimes. For a fixed observation event in a particular plane wave spacetime, the number of images is found to be the same for almost every source. This number can be any positive integer, including infinity. Wavepackets of finite width are discussed in detail as well as waves which maintain a constant amplitude for all time. Short wavepackets are found to generically produce up to two images of each source which appear (separately) only some time after the wave has passed. They are initially infinitely bright, infinitely blueshifted images of the infinitely distant past. Later, these images become dim and acquire a rapidly-increasing redshift. For sufficiently weak wavepackets, one such "flash" almost always exists. The appearance of a second flash requires that the Ricci tensor inside the wave exceed a certain threshold. This might occur if a gravitational plane wave is sourced by, e.g., a sufficiently strong electromagnetic plane wave.
description: 32 pages, 8 figures, fixed typos and slightly added to some explanations
Dipolar versus multipolar dynamos: the influence of the background density stratification
Creators: name: Gastine, T.
name: Duarte, L.
name: Wicht, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Context: dynamo action in giant planets and rapidly rotating stars leads to a broad variety of magnetic field geometries including small scale multipolar and large scale dipole-dominated topologies. Previous dynamo models suggest that solutions become multipolar once inertia becomes influential. Being tailored for terrestrial planets, most of these models neglected the background density stratification. Aims: we investigate the influence of the density stratification on convection-driven dynamo models. Methods: three-dimensional nonlinear simulations of rapidly rotating spherical shells are employed using the anelastic approximation to incorporate density stratification. A systematic parametric study for various density stratifications and Rayleigh numbers allows to explore the dependence of the magnetic field topology on these parameters. Results: anelastic dynamo models tend to produce a broad range of magnetic field geometries that fall on two distinct branches with either strong dipole-dominated or weak multipolar fields. As long as inertia is weak, both branches can coexist but the dipolar branch vanishes once inertia becomes influential. The dipolar branch also vanishes for stronger density stratifications. The reason is the concentration of the convective columns in a narrow region close to the outer boundary equator, a configuration that favors non-axisymmetric solutions. In multipolar solutions, zonal flows can become significant and participate in the toroidal field generation. Parker dynamo waves may then play an important role close to onset of dynamo action leading to a cyclic magnetic field behavior. Conclusion: Our simulations also suggest that the fact that late M dwarfs have dipolar or multipolar magnetic fields can be explained in two ways. They may differ either by the relative influence of inertia or fall into the regime where both types of solutions coexist.
description: 13 pages, 13 figures, 2 tables, accepted for publication in A&A
Structure and stability of online chat networks built on emotion-carrying links
Creators: name: Gligorijevic, Vladimir
name: Skowron, Marcin
name: Tadic, Bosiljka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: High-resolution data of online chats are studied as a physical system in laboratory in order to quantify collective behavior of users. Our analysis reveals strong regularities characteristic to natural systems with additional features. In particular, we find self-organized dynamics with long-range correlations in user actions and persistent associations among users that have the properties of a social network. Furthermore, the evolution of the graph and its architecture with specific k-core structure are shown to be related with the type and the emotion arousal of exchanged messages. Partitioning of the graph by deletion of the links which carry high arousal messages exhibits critical fluctuations at the percolation threshold.
description: 10 pages, 5 figures
Traveling interface modulations in the NH 3 + O 2 reaction on a Rh(110) surface
Creators: name: Rafti, M.
name: Uecker, H.
name: Lovis, F.
name: Krupennikova, V.
name: Imbihl, R.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: ammonia
subject: oxygen
subject: radioisotope
subject: rhodium
subject: article
subject: catalysis
subject: chemistry
subject: oxidation reduction reaction
subject: surface property
subject: theoretical model
subject: Ammonia
subject: Catalysis
subject: Models, Theoretical
subject: Oxidation-Reduction
subject: Oxygen
subject: Radioisotopes
subject: Rhodium
subject: Surface Properties
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: A new type of traveling interface modulation has been observed in the NH 3 + O 2 reaction on a Rh(110) surface. A model is set up which reproduces the effect, which is attributed to diffusional mixing of two spatially separated adsorbates causing an excitability which is strictly localized to the vicinity of the interface of the adsorbate domains. © 2012 the Owner Societies.
D8.1 - Genomics Data Standardization Plan
Creators: name: Singh, Babita
Publisher: name: Zenodo
Year: 2021

description: Minimum set of recommended standards for the analysis and sharing of the genomics dataset for haematology and oncology to be utilized in the GenoMed4All project. Furthermore, guidelines are also described to share phenotypic and other metadata collected from different clinical partners. A brief description of data harmonization and sharing using GA4GH phenopackets and FHIR standards, evaluation of best suited exchange format for genomics data and how to adapt and calibrate standardized data on local sites according to evaluation of clinical data set and genomics interface.
Decoupling absorption and continuum variability in the Seyfert 2 NGC 4507
Creators: name: Braito, V.
name: Ballo, L.
name: Reeves, J. N.
name: Ptak, A.
name: Risaliti, G.
name: Turner, T. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of the Suzaku observation of the Seyfert 2 galaxy NGC 4507. This source is one of the X-ray brightest Compton-thin Seyfert 2s and a candidate for a variable absorber. Suzaku caught NGC 4507 in a highly absorbed state characterised by a high column density (NH \sim8 x10^23 cm^-2), a strong reflected component (R\sim 1.9) and a high equivalent width Fe K alpha emission line (EW\sim 500 eV). The Fe K alpha emission line is unresolved at the resolution of the Suzaku CCDs (sigma < 30 eV or FWHM < 3000 km s^-1) and most likely originates in a distant absorber. The Fe K beta emission line is also clearly detected and its intensity is marginally higher than the theoretical value for low ionisation Fe. A comparison with previous observations performed with XMM-Newton and BeppoSAX reveals that the X-ray spectral curvature changes on a timescale of a few months. We analysed all these historical observations, with standard models as well as with a most recent model for a toroidal reprocessor and found that the main driver of the observed 2-10 keV spectral variability is a change of the line-of-sight obscuration, varying from \sim4x10^23 cm^-2 to \sim9 x 10^23 cm^-2. The primary continuum is also variable, although its photon index does not appear to vary, while the Fe K alpha line and reflection component are consistent with being constant across the observations. This suggests the presence of a rather constant reprocessor and that the observed line of sight NH variability is either due to a certain degree of clumpiness of the putative torus or due to the presence of a second clumpy absorber.
description: 14 pages, 7 figures, 5 tables. Accepted for publication in MNRAS
Energy density functional for nuclei and neutron stars
Creators: name: Erler, J.
name: Horowitz, C. J.
name: Nazarewicz, W.
name: Rafalski, M.
name: Reinhard, P. -G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We aim to develop a nuclear energy density functional that can be simultaneously applied to finite nuclei and neutron stars. We use the self-consistent nuclear density functional theory (DFT) with Skyrme energy density functionals and covariance analysis to assess correlations between observables for finite nuclei and neutron stars. In a first step two energy functionals -- a high density energy functional giving reasonable neutron properties, and a low density functional fitted to nuclear properties -- are matched. In a second step, we optimize a new functional using exactly the same protocol as in earlier studies pertaining to nuclei but now including neutron star data. This allows direct comparisons of performance of the new functional relative to the standard one. The new functional TOV-min yields results for nuclear bulk properties (energy, r.m.s. radius, diffraction radius, surface thickness) that are of the same quality as those obtained with the established Skyrme functionals, including SV-min. When comparing SV-min and TOV-min, isoscalar nuclear matter indicators vary slightly while isovector properties are changed considerably. We discuss neutron skins, dipole polarizability, separation energies of the heaviest elements, and proton and neutron drip lines. We confirm a correlation between the neutron skin of $^{208}$Pb and the neutron star radius. We demonstrate that standard energy density functionals optimized to nuclear data do not carry information on the expected maximum neutron star mass, and that predictions can only be made within an extremely broad uncertainty band. For atomic nuclei, the new functional TOV-min performs at least as well as the standard nuclear functionals, but it also reproduces expected neutron star data within assumed error bands.
description: 11 pages, 8 figures
Brookite versus anatase TiO2 photocatalysts: Phase transformations and photocatalytic activities
Creators: name: Kandiel, Tarek A.
name: Robben, Lars
name: Alkaim, Ayad
name: Bahnemann, Detlef W.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: Titanium dioxide
subject: nanoparticles
subject: X-ray
subject: TiO2
subject: anatase, brookite, and rutile
subject: photocatalytic activity measurement
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Titanium dioxide nanoparticles consisting of pure anatase, anatase-rich, brookite-rich, and pure brookite modifications were synthesized and characterized by X-ray diffraction, field emission-scanning electron microscopy and nitrogen adsorption. The phase transformations among the three modifications of TiO2 (anatase, brookite, and rutile) and the photocatalytic activities of these nanoparticles were investigated by heat treatment over the temperature range from 400 to 800 °C and by the photooxidation of methanol, respectively. Direct transformation of anatase and brookite to rutile was observed, while in the case of the anatase–brookite mixture, anatase transforms firstly to brookite and then to rutile. The photocatalytic activity measurements indicate that brookite nanoparticles exhibit higher photocatalytic activities than anatase, and a comparable activity to that of the anatase-rich nanoparticles. The phase transformations and photocatalytic results are discussed regarding their dependence on crystallite size, surface area, and phase composition.
Assembly of the Red Sequence in Infrared-Selected Galaxy Clusters from the IRAC Shallow Cluster Survey
Creators: name: Snyder, Gregory F.
name: Brodwin, Mark
name: Mancone, Conor M.
name: Zeimann, Gregory R.
name: Stanford, S. A.
name: Gonzalez, Anthony H.
name: Stern, Daniel
name: Eisenhardt, Peter R. M.
name: Brown, Michael J. I.
name: Dey, Arjun
name: Jannuzi, Buell
name: Perlmutter, Saul
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present results for the assembly and star formation histories of massive (~L*) red sequence galaxies in 11 spectroscopically confirmed, infrared-selected galaxy clusters at 1.0 < z < 1.5, the precursors to present-day massive clusters with M ~ 10^15 M_sun. Using rest-frame optical photometry, we investigate evolution in the color and scatter of the red sequence galaxy population, comparing with models of possible star formation histories. In contrast to studies of central cluster galaxies at lower redshift (z < 1), these data are clearly inconsistent with the continued evolution of stars formed and assembled primarily at a single, much-earlier time. Specifically, we find that the colors of massive cluster galaxies at z = 1.5 imply that the bulk of star formation occurred at z ~ 3, whereas by z = 1 their colors imply formation at z ~ 2; therefore these galaxies exhibit approximately the same luminosity-weighted stellar age at 1 < z < 1.5. This likely reflects star formation that occurs over an extended period, the effects of significant progenitor bias, or both. Our results generally indicate that massive cluster galaxy populations began forming a significant mass of stars at z >~ 4, contained some red spheroids by z ~ 1.5, and were actively assembling much of their final mass during 1 < z < 2 in the form of younger stars. Qualitatively, the slopes of the cluster color-magnitude relations are consistent with no significant evolution relative to local clusters.
description: 24 pages, 9 figures, accepted to ApJ
Comparison of Two Epochs of the Zeeman Effect in the 44 GHz Class I methanol (CH3OH) maser line in OMC-2
Creators: name: Momjian, E.
name: Sarma, A. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a second epoch of observations of the 44 GHz Class I methanol maser line toward the star forming region OMC-2. The observations were carried out with the Very Large Array, and constitute one of the first successful Zeeman effect detections with the new WIDAR correlator. Comparing to the result of our earlier epoch of data for this region, we find that the intensity of the maser increased by 50%, but the magnetic field value has stayed the same, within the errors. This suggests that the methanol maser may be tracing the large-scale magnetic field that is not affected by the bulk gas motions or turbulence on smaller scales that is causing the change in maser intensity.
description: 10 pages, 1 figure, accepted for publication in AJ
Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2
Creators: name: Dillert, Ralf
name: Engel, Astrid
name: Große, Julia
name: Lindner, Patrick
name: Bahnemann, Detlef W.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: nitrous oxide
subject: oxygen
subject: titanium
subject: titanium dioxide
subject: article
subject: catalysis
subject: chemistry
subject: kinetics
subject: oxidation reduction reaction
subject: photochemistry
subject: radiation exposure
subject: surface property
subject: ultraviolet radiation
subject: Catalysis
subject: Kinetics
subject: Nitrous Oxide
subject: Oxidation-Reduction
subject: Oxygen
subject: Photochemical Processes
subject: Surface Properties
subject: Titanium
subject: Ultraviolet Rays
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Air pollution by nitrogen oxides represents a serious environmental problem in urban areas where numerous sources of these pollutants are concentrated. One approach to reduce the concentration of these air pollutants is their light-induced oxidation in the presence of molecular oxygen and a photocatalytically active building material which uses titanium dioxide as the photocatalyst. Herein, results of an investigation concerning the influence of the photon flux and the pollutant concentration on the rate of the photocatalytic oxidation of nitrogen(ii) oxide in the presence of molecular oxygen and UV(A) irradiated titanium dioxide powder are presented. A Langmuir-Hinshelwood-type rate law for the photocatalytic NO oxidation inside the photoreactor comprising four kinetic parameters is derived being suitable to describe the influence of the pollutant concentration and the photon flux on the rate of the photocatalytic oxidation of nitrogen(ii) oxide. © 2013 the Owner Societies.
Spin-Polarized Ground States and Ferromagnetic Order Induced by Low-Coordinated Surface Atoms and Defects in Nanoscale Magnesium Oxide
Creators: name: Uchino, Takashi
name: Yoko, Toshinobu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the effect of low-coordinated surface atoms on the defect-induced magnetism in MgO nanocrystallites using hybrid density functional theory calculations. It has been demonstrated that when Mg vacancies are introduced at the corners of cube-like MgO clusters, a magnetic state becomes lower in total energy than the nonmagnetic singlet state by 1-2 eV, resulting in the spin-polarized ground state. The spin density is not only located at the surrounding O atoms neighbor to the corner Mg vacancy site but is also extended to the distant (1 nm or longer) low-coordinated surface O atoms along the <110> directions. This directional spin delocalization allows a remote Mg vacancy-Mg vacancyinteraction, eventually leading to a spontaneous long-range ferromagnetic interaction.
description: 9 pages, 3 figures
Galaxy Pairs in the Sloan Digital Sky Survey - V. Tracing changes in star formation rate and metallicity out to separations of 80 kpc
Creators: name: Scudder, Jillian M.
name: Ellison, Sara L.
name: Torrey, Paul
name: Patton, David R.
name: Mendel, J. Trevor
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a sample of 1899 galaxies with a close companion taken from the SDSS DR7. The galaxy pairs are selected to have velocity differences < 300 km/s, projected separations (rp) < 80 kpc/h, mass ratios between 0.1 and 10, and robust measurements of star formation rates and gas-phase metallicities. We match the galaxies in total stellar mass, redshift, and local density to a set of 10 control galaxies per pair galaxy. For each pair galaxy we can therefore calculate the statistical change in star formation rate (SFR) and metallicity associated with the interaction process. Relative to the control sample, we find that galaxies in pairs show typical SFR enhancements that are, on average, 60% higher than the control sample at rp < 30 kpc/h. In addition, the pairs demonstrate more modest SFR enhancements of ~30% out to at least 80 kpc/h (the widest separations in our sample). Galaxies in both major and minor mergers show significant SFR enhancements at all rp, although the strongest starbursts (with SFR enhancements of a factor of ~10) appear to be found only in the major mergers. For the first time, we are also able to trace the metallicity changes in galaxy pairs as a function of projected separation. The metallicity is generally diluted in galaxy pairs by ~0.02 dex, with an average metallicity decrement of -0.03 dex at the smallest separations. The SFR and metallicity trends with projected separation are interpreted through a comparison with theoretical models. These simulations indicate that the peak in SFR enhancements at small separations is due to systems near the end of the merger process. The extended plateau in SFR enhancements out to at least 80 kpc/h is dominated by galaxies that have made a pericentric passage and are now experiencing triggered star formation on their trajectory towards apogalacticon, or on a subsequent close approach. (Abridged)
description: Accepted for publication in MNRAS. 18 pages, 13 figures
Strong coupling analysis of Aoki phase in Staggered-Wilson fermions
Creators: name: Nakano, Takashi Z.
name: Misumi, Tatsuhiro
name: Kimura, Taro
name: Ohnishi, Akira
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study strong-coupling lattice QCD with staggered-Wilson fermions, with an emphasis on the possibility of spontaneous parity breaking. We perform effective potential analysis in the strong-coupling limit. From gap equations we find the pion condensate becomes nonzero in some range of a mass parameter, which indicates the existence of the parity-broken phase. We also find massless pions and PCAC relations around the second-order phase boundary. These results suggest that we can take the chiral limit by tuning a mass parameter in lattice QCD with staggered-Wilson fermions as with the Wilson fermion.
description: Presented at 30th International Symposium on Lattice Field Theory (Lattice 2012), Cairns, Australia, June 24-29, 2012
Spectromicroscopy of pulses transporting alkali metal in a surface reaction
Creators: name: Günther, S.
name: Liu, H.
name: Menteş, T.O.
name: Locatelli, A.
name: Imbihl, R.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: Spectromicroscopy
subject: low energy electron microscopy
subject: nitrogen
subject: SPELEEM
subject: alkali metal (AM)
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The NO + H2 reaction on a potassium promoted Rh(110) surface is shown to sustain the formation of spatio-temporal periodic patterns leading to mass transport phenomena. The excitation of pulses and the mass transport mechanism are studied in the 10-7 and 10-6 mbar pressure range, with the potassium coverage varying between K = 0.05 and K = 0.12 ML. Using spectroscopic photoemission and spectroscopic low energy electron microscopy (SPELEEM) as well as related microprobe diffraction techniques, we show that the excitation mechanism comprises a cyclic structural transformation: K + O-coadsorbate → (2 × 1)-N → c(2 × 4)-2O,N → K + O coadsorbate. Laterally resolved spectroscopy demonstrates that potassium is accumulated in front of the nitrogen pulses, suggesting that adsorbed nitrogen acts as a diffusion barrier for potassium. © 2013 The Owner Societies.
Subtle polymorphism of zinc imidazolate frameworks: Temperature-dependent ground states in the energy landscape revealed by experiment and theory
Creators: name: Schröder, Christian A.
name: Baburin, Igor A.
name: Van Wüllen, Leo
name: Wiebcke, Michael
name: Leoni, Stefano
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: polymorphism
subject: zinc
subject: in situ X-ray diffraction
subject: crystallisation
subject: silica
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: We show by variable-temperature X-ray diffraction and differential scanning calorimetry experiments that zinc imidazolates with coi and zni framework topology, respectively represent the thermodynamically stable phase below and above a transition temperature of ≈360 °C at ambient pressure. The relative stability of the two polymorphs and the experimentally observed strong negative thermal expansion of the coi phase at high temperatures close to the phase transition were successfully modelled using density functional theory calculations. A novel metastable zinc imidazolate with neb framework topology was detected by in situ X-ray diffraction experiments as a transient crystalline phase during solvothermal crystallisation of the stable coi phase. © 2013 The Royal Society of Chemistry.
Emergence of fluctuating traveling front solutions in macroscopic theory of noisy invasion fronts
Creators: name: Meerson, Baruch
name: Sasorov, Pavel V.
name: Vilenkin, Arkady
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The position of an invasion front, propagating into an unstable state, fluctuates because of the shot noise coming from the discreteness of reacting particles and stochastic character of the reactions and diffusion. A recent macroscopic theory [Meerson and Sasorov, Phys. Rev. E 84, 030101(R) (2011)] yields the probability of observing, during a long time, an unusually slow front. The theory is formulated as an effective classical Hamiltonian field theory which operates with the density field and the conjugate "momentum" field. Further, the theory assumes that the most probable density field history of an unusually slow front represents, up to small corrections, a traveling front solution of the Hamilton equations. Here we verify this assumption by solving the Hamilton equations numerically for models belonging to the directed percolation universality class.
description: 6 pages
Targeting heat-shock-protein 90 (Hsp90) by natural products: Geldanamycin, a show case in cancer therapy
Creators: name: Franke, Jana
name: Eichner, Simone
name: Zeilinger, Carsten
name: Kirschning, Andreas
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: antineoplastic agent
subject: benzoquinone derivative
subject: biological product
subject: geldanamycin
subject: heat shock protein 90
subject: macrocyclic lactam
subject: chemical structure
subject: chemistry
subject: combinatorial chemistry
subject: drug antagonism
subject: drug design
subject: human
subject: review
subject: synthesis
subject: Antineoplastic Agents
subject: Benzoquinones
subject: Biological Products
subject: Combinatorial Chemistry Techniques
subject: Drug Design
subject: HSP90 Heat-Shock Proteins
subject: Humans
subject: Lactams, Macrocyclic
subject: Molecular Structure
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Covering: 2005 to 2013 In this review recent progress in the development of heat shock proteins (Hsp90) in oncogenesis is illuminated. Particular emphasis is put on inhibitors such as geldanamycin and analogues that serve as a natural product show case. Hsp90 has emerged as an important target in cancer therapy and/or against pathogenic cells which elicit abnormal Hsp patterns. Competition for ATP by geldanamycin and related compounds abrogate the chaperone function of Hsp90. In this context, this account pursues three topics in detail: a) Hsp90 and its biochemistry, b) Hsp90 and its role in oncogenesis and c) strategies to create compound libraries of structurally complex inhibitors like geldanamycin on which SAR studies and the development of drugs that are currently in different stages of clinical testing rely. © The Royal Society of Chemistry 2013.
Zur Datierung mediterraner Sigillata aus der spätantiken Befestigung Iatrus an der unteren Donau
Creators: name: Mackensen, Michael
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 69, Nr. 1 (1991)
Millikelvin Reactive Collisions between Sympathetically-Cooled Molecular Ions and Laser-Cooled Atoms in an Ion-Atom Hybrid Trap
Creators: name: Hall, Felix H. J.
name: Willitsch, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report on a study of cold reactive collisions between sympathetically-cooled molecular ions and laser-cooled atoms in an ion-atom hybrid trap. Chemical reactions were studied at average collision energies /k > 20 mK, about two orders of magnitude lower than has been achieved in previous experiments with molecular ions. Choosing N2+ +Rb as a prototypical system, we find that the reaction rate is independent of the collision energy, but strongly dependent on the internal state of Rb. Highly efficient charge exchange about four times faster than the Langevin rate was observed with Rb in the excited (5p) 2P3/2 state. This observation is rationalized in terms of a capture process dominated by the charge- quadrupole interaction and a near resonance between the entrance and exit channels of the reaction. Our results provide a test of classical models for reactions of molecular ions at the lowest energies reached thus far.
description: 5 pages, 4 figures
EDUCATIONAL AND METHODICAL SUPPORT IN TEACHING THE DISCIPLINE "NEUROLOGY" IN HIGHER EDUCATION INSTITUTIONS
Creators: name: Kryvetska, I.
name: Kryvetskyi, V.
name: Kryvetskyi І.
Publisher: name: Sciences of Europe
Year: 2021
Subjects: teaching methods
neurology.

description: The article reveals the main methodological approaches to teaching clinical neurology at the medical faculties of Bukovina State Medical University, aimed at improving the educational process, its optimization and intensification in order to improve the quality of training university graduates in the field of neurology.
Differential Seasonality of Legionnaires’ Disease by Exposure Category
Creators: name: Buchholz, Udo
name: Altmann, Doris
name: Brodhun, Bonita
Publisher: name: Robert Koch-Institut
Year: 2020
Subjects: subject: Legionnaires’ disease
subject: surveillance
subject: seasonality
subject: 610 Medizin und Gesundheit

description: Legionnaires’ disease (LD) shows a seasonal pattern with most cases occurring in summer.We investigate if seasonality can be observed for all three exposure categories (community-acquired(CALD), travel-associated (TALD) and healthcare-associated (HCA)). Methods: LD cases (2005–2015)were classified by exposure categories and we calculated the relative case ratio for each month fromFebruary to December using January as reference. The TALD relative case ratio was compared withflight frequencies. Results: Overall case numbers in Germany (N = 7351) peaked in August. CALDhad a curve similar to all cases. TALD displayed a bimodal curve with peaks in June/July and October.The latter was attributable to LD cases aged 60+. The relative case ratio of TALD surpassed clearlythat of CALD. The curve was similar to that of the relative flight frequencies, but was shifted by aboutone month. HCA showed no apparent seasonality. Conclusions: Although the overall seasonality inLD is heavily influenced by CALD, seasonal di erences are more pronounced for TALD which mayreflect travel behavior. The bimodal pattern of TALD is attributable to the curve among those aged60+ and may reflect their preference to travel outside school holiday periods. Heightened vigilancefor HCA cases is necessary throughout the entire year.
An Abundance of K3 Fibrations from Polyhedra with Interchangeable Parts
Creators: name: Candelas, Philip
name: Constantin, Andrei
name: Skarke, Harald
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Even a cursory inspection of the Hodge plot associated with Calabi-Yau threefolds that are hypersurfaces in toric varieties reveals striking structures. These patterns correspond to webs of elliptic-K3 fibrations whose mirror images are also elliptic-K3 fibrations. Such manifolds arise from reflexive polytopes that can be cut into two parts along slices corresponding to the K3 fibers. Any two half-polytopes over a given slice can be combined into a reflexive polytope. This fact, together with a remarkable relation on the additivity of Hodge numbers, explains much of the structure of the observed patterns.
description: 30 pages, 15 colour figures
Titelei
Creators: name: Redaktion, Die
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 70, Nr. 1 (1992)
Keltisches und Iberisches in der Nekropole El Cigarralejo (Mula, Murcia). Überlegungen zur Fundvorlage und Auswertung durch Emeterio Cuadrado
Creators: name: Lenerz-De Wilde, Majolie
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 70, Nr. 1 (1992)
Collective Modes in Two Dimensional Binary Yukawa Systems
Creators: name: Kalman, Gabor J.
name: Hartmann, Peter
name: Donko, Zoltan
name: Golden, Kenneth I.
name: Kyrkos, Stamatios
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We analyze via theoretical approaches and molecular dynamics simulations the collective mode structure of strongly coupled two-dimensional binary Yukawa systems, for selected density, mass and charge ratios, both in the liquid and crystalline solid phases. Theoretically, the liquid phase is described through the Quasi-Localized Charge Approximation (QLCA) approach, while in the crystalline phase we study the centered honeycomb and the staggered rectangular crystal structures through the standard harmonic phonon approximation. We identify "longitudinal" and "transverse" acoustic and optic modes and find that the longitudinal acoustic mode evolves from its weakly coupled counterpart in a discontinuous non-perturbative fashion. The low frequency acoustic excitations are governed by the oscillation frequency of the average atom, while the high frequency optic excitation frequencies are related to the Einstein frequencies of the systems.
description: 35 pages, 17 figures, submitted to Phys. Rev. E
Das frühkaiserzeitliche Körpergrab von Berlin-Rudow
Creators: name: Fiedler, Uwe
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 71, Nr. 1 (1993)
Machine-assisted synthesis of modulators of the histone reader BRD9 using flow methods of chemistry and frontal affinity chromatography
Creators: name: Guetzoyan, Lucie
name: Ingham, Richard J.
name: Nikbin, Nikzad
name: Rossignol, Julien
name: Wolling, Michael
name: Baumert, Mark
name: Burgess-Brown, Nicola A.
name: Strain-Damerell, Claire M.
name: Shrestha, Leela
name: Brennan, Paul E.
name: Fedorov, Oleg
name: Knapp, Stefan
name: Ley, Steven V.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2014
Subjects: subject: Biochemie
subject: FAC-MS
subject: Frontal Affinity Chromatography
subject: Mass Spectrometry
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: A combination of conventional organic synthesis, remotely monitored flow synthesis and bioassay platforms, were used for the evaluation of novel inhibitors targeting bromodomains outside the well-studied bromodomain and extra terminal (BET) family, here exemplified by activity measurements on the bromodomain of BRD9 protein, a component of some tissue-specific SWi/SNF chromatin remodelling complexes. The Frontal Affinity Chromatography combined with Mass Spectrometry (FAC-MS) method proved to be reliable and results correlated well with an independent thermal shift assay.
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 73, Nr. 1 (1995)