cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Solar twins in M67 : Evolutionary status and lithium abundance
Creators: name: Castro, M.
name: Nascimento, J. D. do
name: Biazzo, K.
name: Melendez, J.
name: De Medeiros, J. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We determine the age and mass of the three best solar twin candidates in open cluster M67 through lithium evolutionary models. We computed a grid of evolutionary models with non-standard mixing at metallicity [Fe/H] = 0.01 with the Toulouse-Geneva evolution code for a range of stellar masses. We estimated the mass and age of 10 solar analogs belonging to the open cluster M67. We made a detailed study of the three solar twins of the sample, YPB637, YPB1194, and YPB1787. We obtained a very accurate estimation of the mass of our solar analogs in M67 by interpolating in the grid of evolutionary models. The three solar twins allowed us to estimate the age of the open cluster, which is 3.87+0.55-0.66 Gyr, which is better constrained than former estimates. Our results show that the 3 solar twin candidates have one solar mass within the errors and that M67 has a solar age within the errors, validating its use as a solar proxy. M67 is an important cluster when searching for solar twins.
description: 8 pages, 6 figures
Curved trajectories on transformed metal surfaces: Luneburg lens, beam-splitter, invisibility carpet and black hole for surface plasmon polaritons
Creators: name: Muamer, Kadic
name: Guillaume, Dupont
name: Chang, Tieh-Ming
name: Guenneau, Sebastien
name: Enoch, Stefan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Transformational optics are shown to markedly enhance the control of the electromagnetic wave trajectories within metamaterials with unconventional functionalities such as a beam splitter, a toroidal carpet, a Luneburg lens and a black hole, all of which are specially designed for surface plasmon polaritons propagating on a metal plate
description: 10 pages 4 figures Tacona 2010
Keep calm and carry on : charting the effects of mindfulness on work performance
Creators: name: Kay, Adam A.
Publisher: name: University of British Columbia
Year: 2018

description: Interest in mindfulness in the workplace is nascent and booming. Early research has associated mindfulness with some indicators of work performance, but the relationship with numerous other performance indicators remains unexplored. Research to date also suffers from a paucity of studies that test whether mindfulness causally affects work performance, as well as the psychological mechanisms by which it does so. The present research seeks to fill these gaps by examining the effect of mindfulness on two key performance-related outcomes: (a) conflict avoidance, and (b) interpersonal organizational citizenship behaviors. In so doing, it works within the framework of affective events theory and extends it by examining the role of affect regulation on work behavior. Building upon recent theorizing that mindfulness has a multi-faceted influence on affective experience, this research also seeks to test the effect of mindfulness on two broad types of affect regulation: (a) antecedent-focused, and (b) response-focused. On the one hand, this research posits that mindfulness can serve to enhance eudaimonic well-being and the positive affect it entails, thereby increasing interpersonal organizational citizenship behaviors; on the other, it contends that mindfulness increases emotion acceptance, thereby mitigating negative affect in the face of conflict and reducing the avoidance thereof. Across two series of three multi-methods studies each, this research seeks to test these and other hypotheses in the hope of enriching and expanding the literature on mindfulness in the workplace, and to do so in ways that are methodologically original, practically relevant, and theoretically meaningful. It concludes that mindfulness can indeed improve work performance, and that a key mechanism by which it does so is through its impact on affective experience.
Revisión de la política exterior nuclear de España
Creators: name: Llorente Aguilera, Carlos
Publisher: name: figshare
Year: 2022
Subjects: History

description: The aim of this paper is to provide a perspective on Spain's foreign policy during the years from 1986 to 2001 concerning the nuclear aspect, both in terms of weapons and energy and in relation to actions carried out in the field of non-proliferation, in order to determine what were the actions of the different Spanish governments in this stage of change and renewal that aligned Spain with the surrounding countries and pushed her to occupy a position in the international arena according to her historical, economic and social status. Having received the subjects of national nuclear field a little attention on the part of the historians in Spain, it becomes necessary to deepen in this aspect so defining of the foreign policy in other countries and that on many occasions it has marked the becoming of the action of the State of form overlapping and out of the main plane of public attention.
An Access Control Metamodel for Web Service-Oriented Architecture
Creators: name: Emig, Christian
name: Brandt, Frank
name: Abeck, Sebastian
name: Biermann, Jürgen
name: Klarl, Heiko
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: Access Control Model, Identity Management (IdM), Web Service-Oriented Architecture (WSOA), Metamodel, Policy Decision Point (PDP), Business Process Execution Language (BPEL)
subject: 004 Informatik
subject: D.2.0
subject: D.2.2
subject: K.6.3
subject: K.6.5

description: With the mutual consent to use WSDL (Web Service Description Language) to describe web service interfaces and SOAP as the basic communication protocol, the cornerstone for web service-oriented architecture (WSOA) has been established. Considering the momentum observable by the growing number of specifications in the web service domain for the indispensable cross-cutting concern of identity management (IdM) it is still an open issue how a WSOA-aware IdM architecture is built and how it is linked with WSOA’s main elements, the web services providing functional core concerns. In this paper we present an access control model for WSOA and a blueprint of a WSOA-aware authorization verification service which is part of the IdM architecture. We show the integration of this service with WSOA consisting of both basic and composite web services. Our solution has been tested and evaluated in an implementation case study.
Thiobacillus plumbophilus spec. nov., a novel galena and hydrogen oxidizer
Creators: name: Drobner, E.
name: Huber, Harald
name: Rachel, R.
name: Stetter, Karl Otto
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 570 Biowissenschaften, Biologie

description: From an uranium mine three strains of rodshaped, mesophilic, chemolithoautotrophic bacteria were isolated. They grow by oxidation of H2S, galena (PbS) and H2. Anglesite (PbSO4) is formed from galena. No ferrous iron is oxidized by the isolates. They grow between pH 4 and 6.5 at temperatures of about 9 to 41°C (optimum around 27°C). The G+C content of the DNA is around 66 mol %. Based on their ability to oxidize sulfur compounds, the new organisms belong to the genus Thiobacillus. No significant homology with Thiobacillus ferrooxidans and Thiobacillus cuprinus was detected by DNA-DNA hybridization. Therefore the new isolates represent a new species within the genus Thiobacillus. Based on the unusual growth on galena, we name the new species Thiobacillus plumbophilus (type strain Gro 7; DSM 6690).
Mass-Loss Timescale of Star Clusters in an External Tidal Field. II. Effect of Mass Profile of Parent Galaxy
Creators: name: Tanikawa, Ataru
name: Fukushige, Toshiyuki
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the long-term dynamical evolution of star clusters in a steady tidal field produced by its parent galaxy. In this paper, we focus on the influence of mass profile of the parent galaxy. The previous studies were done with the simplification where the parent galaxy was expressed by point mass. We express different mass profiles of the parent galaxy by the tidal fields in which the ratios of the epicyclic frequency to the angular velocity are different. We compare the mass-loss timescale of star clusters whose tidal radii are identical but in parent galaxies with different mass profile, by means of orbits calculations in fixed cluster potential and N-body simulations. In this situation, a cluster rotates around the parent galaxy more rapidly as the parent galaxy has shallower mass profile. We found that the mass-loss timescale increase 20% and 50% for the cases that the mass density profile of the parent galaxies are proportional to R^-2 and R^-1.5 where R is the distance from the galaxy center, compared to the point-mass case, in moderately strong tidal field. Counterintuitively, a cluster which rotates around the parent galaxy more rapidly has a longer lifetime. The increase of lifetime is due to the fact that the fraction occupied by regular-like orbit increases in shallower profile. Finally, we derive an evaluation formula for the mass-loss timescale of clusters. Our formula can explain a property of the population of the observed galactic globular clusters that their half-mass radii become smaller as their distances from the galactic center become smaller.
description: Submitted to PASJ
Essays in Economic History
Creators: name: Haddad, Joanne
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: persistence
migration
minorities
female labor force participation
norms and values

description: The first chapter relates the size of the present-day LGBT population to the discovery of gold during the nineteenth century gold rushes. Comparing the surroundings of gold rush counties to other mining counties, we find that there are currently 15% more same-sex couples in former gold rush counties and that residents of these counties have more favorable attitudes toward homosexuality. Gold rush counties were initially isolated, mostly uninhabited and lacked strong formal institutions, which helped shaping pro-LGBT attitudes. Examining channels of persistence, we provide empirical evidence for selective migration and the lack of strong religious institutions. The second chapter examines the impact of gender focused labor legislation on women’s labor force participation and economic empowerment. We rely on historical legislative acts passed by state legislatures and exploit whether or not states passed regulatory laws regulating overall and industry specific employment and work conditions for women, night work laws and labor laws requiring provision of seats for working women. We exploit the fact that not all states enacted these laws as well as the variation in the timing of enactment of such laws. Our results show that women in comparison to men in treated states are more likely to be in the labor force post introduction of night work laws in comparison to control states. We also document the effect of industry-specific labor policies on women’s likelihood to be employed in the affected industry and in higher-wage occupations within the industry of interest. Policy implications of our findings endorse the adoption of labor laws in favor of women to advocate their empowerment through a higher involvement in the labor market and financial independence. The third chapter tests the doctrine of first effective settlement by relating early settlers’ culture to within state variation in gender norms in the United States. In 1973, the cultural geographer Wilbur Zelinsky postulated that the distinctive traits of early settlers at initial stages of institutional development may be crucial for cultural formation. I capture settlers’ culture using past female labor force participation, women’s suffrage and financial rights at their place of origin. I document the distinctive characteristics of settlers’ populations and provide suggestive evidence in support of the spatial (across locations) and vertical (over time) transmission of gender norms. My results show that women’s labor supply is higher, in both the short and long run, in U.S. counties that historically hosted a larger settler population originating from places with favorable gender attitudes. My findings shed new light on the importance of immigrants’ characteristics and their countries/states of origin for cultural formation in hosting societies.
The targum (1880:Jan.)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1880

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Two Distinct Red Giant Branches in the Globular Cluster NGC 288
Creators: name: Roh, Dong-Goo
name: Lee, Young-Wook
name: Joo, Seok-Joo
name: Han, Sang-Il
name: Sohn, Young-Jong
name: Lee, Jae-Woo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the presence of two distinct red giant branches (RGBs) in the globular cluster NGC 288 from the narrow-band calcium and Strömgren b & y photometry obtained at the CTIO 4m Blanco telescope. The RGB of NGC 288 is clearly split into two in the hk [=(Ca - b) - (b - y)] index, while the split is not shown in the b - y color. Unlike other globular clusters with multiple populations reported thus far, the horizontal branch of NGC 288 is only mildly extended. Our stellar population models show that this and the presence of two distinct RGBs in NGC 288 can be reproduced if slightly metal-rich (Δ[m/H] $\approx$ 0.16) second generation stars are also enhanced in helium by small amount (ΔY $\approx$ 0.03) and younger by ~ 1.5 Gyrs. The RGB split in hk index is most likely indicating that the second generation stars were affected by supernovae enrichment, together with the pollutions of lighter elements by intermediate-mass asymptotic giant branch stars or fast-rotating massive stars. In order to confirm this, however, spectroscopy of stars in the two distinct RGB groups is urgently required.
description: Accepted for publication in the Astrophysical Journal Letters
Supplementary document for Low-loss silicon nitride photonic ICs for single-photon applications - 6133103.pdf
Creators: name: Rodionov, Ilya
name: Buzaverov, Kirill
name: Baburin, Aleksandr
name: Sergeev, Evgeny
name: AVDEEV, SERGEY
name: Evgeniy, Lotkov
name: Andronik, Mihail
name: Stukalova, Victoria
name: Bakykov, Dmitriy
name: Dyakonov, Ivan
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplementary file
Thiobacillus prosperus sp. nov., represents a new group of halotolerant metal-mobilizing bacteria isolated from a marine geothermal field
Creators: name: Huber, Harald
name: Stetter, Karl Otto
Publisher: name: Universität Regensburg
Year: 1989
Subjects: subject: 570 Biowissenschaften, Biologie

description: From the shallow geothermally heated seafloor at the beach of Porto di Levante (Vulcano, Italy) 8 strains of long, tiny rods were isolated, which represent the first marine metal-mobilizing bacteria. Cells are Gram negative. They grow in a temperature range between 23 and 41°C with an optimum around 37°C at a salt concentration of up to 6.0% NaCl. The isolates are obligately chemolithotrophic, acidophilic aerobes which use sulfidic ores, elemental sulfur or ferrous iron as energy sources and procedure sulfuric acid. They show an upper pH-limit of growth at around 4.5. The G+C content of their DNA is around 64 mol%. Based on the results of the DNA-DNA hybridization they represent a new group within the genus Thiobacillus. Isolate LM3 is described as the type strain of the new species Thiobacillus prosperus.
Les fonctions exécutives chez les enfants : réévaluer "l'avantage du bilingue" à l'aide d'une nouvelle tâche développementale
Creators: name: Drolet, Marie Hélène Lucie Renée
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: Bilinguisme
Fonctions Exécutives
Enfants
Contrôle attentionnel

description: L’étude des fonctions exécutives constitue un des principaux sujets de recherche à l’heure actuelle dans le domaine du bilinguisme. L’expérience unique des personnes bilingues associée au fait de devoir constamment jongler entre deux langues favoriserait le développement de certains processus cognitifs (p. ex. inhibition de la réponse, contrôle attentionnel, etc.) leur donnant ainsi un certain avantage. Cet avantage cognitif a cependant récemment été remis en question dû aux problèmes méthodologiques rencontrés dans plusieurs études le prônant et suite à l’impossibilité de reproduire leurs résultats. Dans le but de répondre à certaines de ces critiques, nous avons soumis 65 enfants (31 unilingues) de 4 à 6 ans à une nouvelle tâche courte et amusante visant à mesurer les fonctions exécutives. Les enfants ont été recrutés dans la communauté et testés à un Living Lab. La tâche était constituée de 20 essais durant lesquels les participants devaient sélectionner l’un des cinq objets ne correspondant pas à ce qui était représenté sur des cartes, en termes de forme et de couleur. La performance des participants a été analysée en tenant compte de leur expérience linguistique, de leur âge et de leur statut socio-économique. Les résultats ont indiqué un effet d’âge sur la performance. Aucune différence de performance attribuable à l’expérience linguistique des participants ou à leur statut socio-économique n’a été observée. Nos résultats ne fournissent donc pas de preuve pouvant soutenir la présence d’un avantage associé au fait de parler deux langues.
Untitled Item
Creators: name: Llorente Aguilera, Carlos
Publisher: name: figshare
Year: 2022
Subjects: History

description: The aim of this paper is to provide a perspective on Spain's foreign policy during the years from 1986 to 2001 concerning the nuclear aspect, both in terms of weapons and energy and in relation to actions carried out in the field of non-proliferation, in order to determine what were the actions of the different Spanish governments in this stage of change and renewal that aligned Spain with the surrounding countries and pushed her to occupy a position in the international arena according to her historical, economic and social status. Having received the subjects of national nuclear field a little attention on the part of the historians in Spain, it becomes necessary to deepen in this aspect so defining of the foreign policy in other countries and that on many occasions it has marked the becoming of the action of the State of form overlapping and out of the main plane of public attention.
DeepTreeGAN: Fast Generation of High Dimensional Point Clouds
Creators: name: Scham, Moritz
name: Käch, Benno
name: Krücker, Dirk
name: Borras, Kerstin
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023

description: In High Energy Physics, detailed and time-consuming simulations are used for particle interactions with detectors. To bypass these simulations with a generative model, the generation of large point clouds in a short time is required, while the complex dependencies between the particles must be correctly modelled. Particle showers are inherently tree-based processes, as each particle is produced by the decay or detector interaction of a particle of the previous generation.In this work, we present a novel Graph Neural Network model (DeepTreeGAN) that is able to generate such point clouds in a tree-based manner. We show that this model can reproduce complex distributions, and we evaluate its performance on the public JetNet dataset.
Magic NeRF Lens: Interactive Fusion of Neural Radiance Fields for Virtual Facility Inspection
Creators: name: Li, Ke
name: Schmidt, Susanne
name: Rolff, Tim
name: Bacher, Reinhard
name: Leemans, Wim
name: Steinicke, Frank
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023

description: Large industrial facilities such as particle accelerators and nuclear power plants are critical infrastructures for scientific research and industrial processes. These facilities are complex systems that not only require regular maintenance and upgrades but are often inaccessible to humans due to various safety hazards. Therefore, a virtual reality (VR) system that can quickly replicate real-world remote environments to provide users with a high level of spatial and situational awareness is crucial for facility maintenance planning. However, the exact 3D shapes of these facilities are often too complex to be accurately modeled with geometric primitives through the traditional rasterization pipeline. In this work, we develop Magic NeRF Lens, an interactive framework to support facility inspection in immersive VR using neural radiance fields (NeRF) and volumetric rendering. We introduce a novel data fusion approach that combines the complementary strengths of volumetric rendering and geometric rasterization, allowing a NeRF model to be merged with other conventional 3D data, such as a computer-aided design model. We develop two novel 3D magic lens effects to optimize NeRF rendering by exploiting the properties of human vision and context-aware visualization. We demonstrate the high usability of our framework and methods through a technical benchmark, a visual search user study, and expert reviews. In addition, the source code of our VR NeRF framework is made publicly available for future research and development.
Extension of process models to predict batch screening results under the influence of moisture based on DEM simulations
Creators: name: Elskamp, Frederik
name: Kruggel-Emden, Harald
Publisher: name: Technische Universität Berlin
Year: 2018
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: discrete element method
subject: process model
subject: liquid bridges
subject: screening
subject: moisture

description: Screening is a technical simple but still not fully understood process step, which can be used in a wide field of applications to separate bulk materials according to their particle sizes. A severe issue in screening technologies is that particles frequently prevail in moist conditions, due to effects related to the environment, the material or the process. This is often not preventable, although it is not preferred due to attractive forces altering the screening efficiency. For the design of dry screening processes, phenomenological models and detailed particle-based simulation approaches like the discrete element method (DEM) are available. The latter method has recently been extended and validated against experiments to calculate forces caused by liquid bridges formed out between particles or walls close to each other to meet the requirements to tackle real particle systems under moist conditions. In the investigation here, batch screening under the influence of moisture involving different sized glass spheres is investigated numerically with DEM simulations and by using process models. Therein, the related subprocesses stratification and passage as well as the influence of the operating parameters and the liquid amount on the fraction retained per size class are examined. Existing phenomenological process models, which can be applied efficiently for industrial applications due to their short calculation time, are extended to represent batch screening processes under moist conditions for the first time. Therefore, a benchmark is realized in which the fraction retained per size class over time for discontinuous screening under the influence of various amounts of liquid and different mechanical agitations obtained by DEM simulations and process models is compared. In this context, the process models are first adjusted to fit related simulation results and later used in a novel method to predict the outcome of screening with different operating parameters and liquid amounts. Thereby, process models, which consider the subprocesses stratification and passage, predict screening results for process parameters requiring interpolation or extrapolation in the investigated range very well. As a consequence, newly derived process models can function as prototypes to be applied in dynamic process simulation frameworks.
Large transconductance oscillations in a single-well vertical Aharonov-Bohm interferometer
Creators: name: Piazza, Vincenzo
name: Beltram, Fabio
name: Wegscheider, Werner
name: Liang, Chi-Te
name: Pepper, M.
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik
subject: 73.23.-b

description: Aharonov-Bohm (AB) interference is reported for the first time in the conductance of a vertical nanostructure based on a single GaAs/AlxGa1-xAs quantum well (QW). The two lowest subbands of the well are spatially separated by the Hartree barrier originating from electronic repulsion in the modulation-doped QW and provide AB two-path geometry. Split-gates control the in-plane electronic momentum dispersion. In our system, we have clearly demonstrated AB interference in both electrostatic and magnetic modes. In the latter case the magnetic field was applied parallel to the QW plane, and perpendicular to the 0.02 μm2 AB loop. In the electrostatic mode of operation the single-QW scheme adopted led to large transconductance oscillations with relative amplitudes exceeding 30%. The relevance of the present design strategy for the implementation of coherent nanoelectronic devices is underlined.
Electron transport in a two-dimensional electron gas with magnetic barriers
Creators: name: Vancura, T.
name: Ihn, Thomas
name: Broderick, S.
name: Ensslin, Klaus
name: Wegscheider, Werner
name: Bichler, Max
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik
subject: 73.40.-c

description: The low-temperature longitudinal and Hall resistances of a two-dimensional electron gas are studied in the presence of a magnetic barrier created under the edge of a thin ferromagnetic film. An in-plane external magnetic field allows us to tune the barrier height within the classically transmissive regime. A theoretical model is presented that predicts the size and shape of the resistance correction for the ballistic case in the presence of a single magnetic barrier. The model that contains no adjustable parameters is in qualitative agreement with the experiment. The size of the predicted resistance correction agrees with the measurement within a factor of 2.
Drag effect between 2D electron gases: composite fermion and screening effects
Creators: name: Jörger, C.
name: Dietsche, W.
name: Wegscheider, Werner
name: Klitzing, Klaus von
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: Drag effect; Double quantum wells; Composite fermion
subject: 530 Physik
subject: 73.40.Hm; 73.20.Dx

description: We report on experimental data of the drag effect between 2D electron gases confined to two separate layers in a strong perpendicular magnetic field. We investigate the coupling at Landau level filling factor Image as a function of temperature, carrier densities of the two layers and distance between them. A good agreement is found with a recent theory based on Coulomb interaction. Furthermore we investigate the coupling at higher filling factors as a function of temperature and parallel magnetic field.
Screening of excitonic states by low-density 2D charge carriers in GaAs/AlGaAs quantum wells
Creators: name: Gubarev, S. I.
name: Kukushkin, I. V.
name: Tovstonog, S. V.
name: Akimov, M. Yu.
name: Smet, J. H.
name: Klitzing, Klaus von
name: Wegscheider, Werner
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik
subject: 73.20.Dx - 71.35.Cc

description: Screening of excitonic states by a system of 2D electrons (or holes) in GaAs/AlGaAs single quantum wells is studied. With increasing concentration of 2D charge carriers, a threshold-type disappearance of excitonic states is observed in both luminescence and reflectance spectra. The higher the quality of the 2D system, the lower the corresponding threshold concentration. In the best systems, the collapse of excitonic states occurs at unexpectedly low electron densities n e =5×109 cm−2, which correspond to the mean dimensionless distance between the particles r s =8. This value far exceeds the threshold values observed for 3D systems (r s ≈2), as well as the values obtained for quantum wells in previous studies. The problem of measuring the concentration of low-density 2D charge carriers in photoexcitation conditions is solved by applying the method of optical detection of the dimensional magnetoplasma resonance. This method provides reliable measurements of the density of a 2D system to the values about 109 cm−2.
La construction de la consommation des boissons sucrées alcoolisées Four Loko et FCKD UP chez les jeunes comme problème public au Québec
Creators: name: Masse, Yannick
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: Problème public
Boisson sucrée alcoolisée
Politique publique
Consommation d'alcool
Jeunes

description: La consommation de boissons sucrées alcoolisées chez les jeunes a suscité de nombreux débats dans les médias et auprès des gouvernements québécois et canadien. L’arrivée des boissons Four Loko et FCKD UP sur les tablettes au Québec a mené à la problématisation (à la définition d’une pratique comme un problème social) de la consommation de boissons sucrées alcoolisées qui s’est soldée par deux politiques publiques restrictives. Dans cette thèse, nous analysons en détail le parcours de construction de ce problème public à travers le discours des acteurs influents dans le milieu de l’alcool. Par une contextualisation historique de l’arrivée des boissons sucrées alcoolisées, nous sommes en mesure de bien comprendre comment ces boissons sont arrivées sur le marché québécois. Par la suite, nous présentons le positionnement des différents acteurs ayant eu une influence considérable sur la problématisation. Ceci nous permet de bien saisir les interrelations entre les acteurs et de présenter en détail les intérêts en jeu. Finalement, nous analysons le discours des acteurs à travers les médias, les documents gouvernementaux et des entretiens réalisés avec les acteurs les plus influents sur le problème. Nous concluons qu’il y aurait une sensibilité particulière à la protection de la jeunesse au Québec, particulièrement accentuée en ce qui a trait à la consommation d’alcool. Nous expliquons également qu’une réflexivité sur le processus d’élaboration des politiques publiques serait intéressante dans ce domaine pour repenser la place des acteurs. Nous disons également quelques mots sur la distinction du Québec en matière de gestion et de consommation d’alcool. Nous nous inspirons de la théorie sur les comportements collectifs comme problème social de Blumer afin d’offrir une chronologie systématique et fine de la problématisation de la consommation des boissons sucrées alcoolisées. Également, notre analyse du positionnement des acteurs est construite à partir de la théorie des constellations développée par Stevens et Zampini. Nous sommes ainsi mieux en mesure de comprendre les relations entre les acteurs et de les classer en fonction des enjeux défendus. Nous faisons également un clin d’œil aux contributions des théories anthropologiques sur la culture de l’alcool en montrant les différentes représentations sociales de la consommation d’alcool dans la société civile québécoise.
Untersuchung von microRNAs aus genetischen Risikoloci für Multiple Sklerose
Creators: name: Boxberger, Nina
Publisher: name: Universität Rostock
Year: 2021
Subjects: subject: 610 Medical sciences Medicine

description: Das Ziel der Arbeit bestand darin, das Verständnis der genetischen Prädisposition für Multiple Sklerose (MS) durch microRNAs und die Rolle solcher microRNAs für die Pathogenese der MS besser zu verstehen. Elf MS-assoziierte microRNAs wurden identifiziert. Für sechs dieser microRNAs konnte eine SNP-abhängige Prozessierung gezeigt werden. Für drei wurden teils bislang unbekannte Zielgene identifiziert. Reife microRNAs aus sechs microRNA-kodierenden Loci konnten erstmals mit hohen Expressionsleveln in B-Zellen nachgewiesen werden und für einige SNPs zeigten sich eQTL-Effekte.
The targum (1880:June)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1880

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
A triaxial reference ellipsoid for the Earth
Creators: name: Hu, Xuanyu
name: Shum, C. K.
name: Bevis, Michael
Publisher: name: Springer Science and Business Media LLC
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
subject: earth
subject: triaxiality
subject: reference ellipsoid
subject: ellipsoidal harmonics
subject: exact solution

description: We present a new, physically motivated triaxial reference ellipsoid for the Earth. It is an equipotential surface in the gravity field and closely approximates the geoid, akin to the conventional reference ellipsoid of revolution. According to Burša and Fialová (Studia Geophysica et Geodaetica 37(1):1–13, 1993), the triaxial reference ellipsoid is uniquely, but not exclusively, specified by the body’s total mass, the dynamic form factors of polar and equatorial flattening, the longitude of the equatorial major axis, the rotation rate, and the designated surface potential. We model the gravity field using triaxial ellipsoidal harmonics. While they are rarely considered practical for near-spherical planets, we leverage an intrinsic property that ellipsoidal harmonics yield an exact expression for the constant potential on a triaxial ellipsoid. A practical procedure is proposed to solve for the ellipsoidal parameters that converge iteratively to fulfill the exact condition of equipotentiality. We present the solution for the Earth Gravitational Model 2008.
Shifting a quantum wire through a disordered crystal: Observation of conductance fluctuations in real space
Creators: name: Heinzel, Thomas H.
name: Salis, G.
name: Held, R.
name: Lüscher, S.
name: Ensslin, Klaus
name: Wegscheider, Werner
name: Bichler, Max
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik
subject: 73.23.-b, 72.20.Dp, 73.40.Kp

description: A quantum wire is spatially displaced by suitable electric fields with respect to the scattering potentials inside a semiconductor crystal. As a function of the wire position, the low-temperature conductance shows reproducible fluctuations. Their characteristic temperature scale is a few hundred millikelvin, indicating a phase-coherent effect. One fluctuation is attributed to a single bump in the scattering potential entering or leaving the wire.
Cold Molecular Gas in the Inner Two Kiloparsec of NGC4151
Creators: name: Dumas, G.
name: Schinnerer, E.
name: Mundell, C. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first spatially resolved spectroscopic imaging observations of the 12CO(1-0) line emission in the central 2.5 kpc of the Seyfert 1 galaxy NGC4151, obtained with the IRAM Plateau de Bure Interferometer (PdBI). Most of the cold molecular gas is distributed along two curved gas lanes about 1 kpc north and south of the active nucleus, coincident with the circumnuclear dust ring noted by previous authors. These CO arcs lie within the Inner Lindblad Resonance of the large scale oval bar and have kinematics consistent with those derived from neutral hydrogen observations of the disk and bar. Two additional gas clumps are detected that show non-circular motions - one associated with the southern gas lane and one lying ~600 pc north of the nucleus. Closer to the nucleus, no cold molecular gas is detected in the central 300 pc where abundant near-IR H2 line emission arises. This suggests that the H2 line emission is not a good indicator for a cold gas reservoir in NGC4151 and that the H2 is likely photo-excited by the AGN. The upper limit of the CO mass in the central 300 pc is sufficient to support the AGN activity at its current level for 10^7 yrs. The total cold molecular mass detected by PdBI is 4.3 10^7 Msun. Finally, 3 mm continuum emission arising from the location of the AGN is detected with a flux of S~14 mJy and appears to be unresolved at an angular resolution of 2.8" (~180 pc).
description: accepted to ApJ, 29 pages, 10 figures
Magnetotransport measurements on freely suspended two-dimensional electron gases
Creators: name: Blick, Robert H.
name: Monzon, F. G.
name: Wegscheider, Werner
name: Bichler, Max
name: Stern, F.
name: Roukes, M. L.
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik
subject: 73.50.-h, 07.10.Cm

description: We present magnetotransport measurements on freely suspended two-dimensional electron gases from AlxGa1-xAs/GaAs heterostructures. The technique to realize such devices relies on a specially molecular beam epitaxy grown GaAs/AlxGa1-xAs-heterostructure, including a sacrificial layer. We fabricated simple mini-Hall-bars as well as quantum cavities and quantum dot systems. We find well-pronounced Shubnikov–de Haas oscillations and observe commensurability resonances, allowing characterization of the electron gas in these 100-nm thin membranes.
VOLUMETRIC PROPERTIES OF ASPHALT CONCRETE MADE FROM ZANZIBAR CORALLINE AGGREGATES
Creators: name: Maregesi, Gerald
Publisher: name: figshare
Year: 2023
Subjects: Civil geotechnical engineering

description: This paper presents the unusual engineering properties of coralline aggregates used for asphalt binder course production during the rehabilitation of  Zanzibar airport (Tanzania). The geotechnical and geomechanical properties of the coralline aggregates,  asphalt concrete mix design and the volumetric parameters achieved during mix design are discussed. Asphalt concrete production and the placing procedures are also discussed. Finally, the paper recommends the measures to be taken when using coralline aggregates for asphalt concrete production.
The effect of the pseudogap on suppressing high energy inelastic neutron scattering in superconducting YBa2Cu3O6.5
Creators: name: Stock, C.
name: Cowley, R. A.
name: Buyers, W. J. L.
name: Frost, C. D.
name: Taylor, J. W.
name: Peet, D.
name: Liang, R.
name: Bonn, D.
name: Hardy, W. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have measured the spin fluctuations in the YBa2Cu3O6.5 (YBCO6.5, Tc=59 K) superconductor at high-energy transfers above ~ 100 meV. Within experimental error, the momentum dependence is isotropic at high-energies, similar to that measured in the insulator for two dimensional spin waves, and the dispersion extrapolates back to the incommensurate wave vector at the elastic position. This result contrasts with previous expectations based on measurements around 50 meV which were suggestive of a softening of the spin-wave velocity with increased hole doping. Unlike the insulator, we observe a significant reduction in the intensity of the spin excitations for energy transfers above ~ 100 meV similar to that observed above ~ 200 meV in the YBCO6.35 (Tc=18 K) superconductor as the spin waves approach the zone boundary. We attribute this high energy scale with a second gap and find agreement with measurements of the pseudogap in the cuprates associated with electronic anomalies along the antinodal positions. In addition, we observe a sharp peak at around 400 meV whose energy softens with increased hole doping. We discuss possible origins of this excitation including a hydrogen related molecular excitation and a transition of electronic states between d levels.
description: (16 pages, 12 figures, to be published in Physical Review B)
Supplementary document for Tolerance to Aberration and Misalignment in a Two-Point-Resolving Image Inversion Interferometer - 6394627.pdf
Creators: name: Schodt, David
name: Cutler, Patrick
name: Chavez, Francisco Becerra
name: Lidke, Keith
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental tex files
Scalar-matter-gluon interaction
Creators: name: Maas, Axel
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A full non-perturbative treatment of gauge theories requires to include matter fields on equal footing with the gauge fields. Scalar matter can act as a role model for generic matter, as many questions, e.g. confinement, can be posed without referring to a particular Lorentz structure. Due to their rather simple structure they are also useful to develop methods. One possible way to describe gauge theories beyond perturbation theory is based on correlation functions. After a short discussion of the setup, lattice gauge theory is used to analyze the interaction of gluons with quenched fundamental and adjoint scalars. Both the two-point and three-point correlation functions for massive and massless adjoint and fundamental scalars will be determined, in minimal Landau gauge. The findings are in agreement with the possibility that scalars are only slightly affected by the interaction with gluons. The results are compared briefly with dynamical, massive scalars, showing no significant changes in the confinement region compared to the quenched case.
description: 10 pages, 3 figures, invited talk presented at the workshop "The many faces of QCD", Ghent, Belgium, 1st of November-5th of November 2010; submitted to the proceedings
Affine Schottky Groups and Crooked Tilings
Creators: name: Charette, Virginie
name: Goldman, William M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57M05 (Low-dimensional topology), 20H10 (Fuchsian groups and their genearlizations), 30F60 (Teichmuller theory)

description: In his 1990 doctoral thesis, Todd Drumm showed that proper affine deformations of free Fuchsian groups could be constructed as Schottky groups using a new family of hypersurfaces called "crooked planes." The existence of proper affine deformations of Fuchsian Schottky groups was demonstrated by Margulis in the early 1980's, answering a question raised by Milnor in 1977. This paper expounds Drumm's result, at least in the case of Fuchsian Schottky groups (that is, when the group contains no parabolic elements).
description: This paper appeared in the Contemporary Mathematics volume, "Crystallographic groups and their generalizations", the proceedings of the conference in Kortrijk, Belgium in 1999 and represents an expanded version of the lecture presented by the second-named author. The paper contains 18 figures.
On the nature of the extremely fast optical rebrightening of the afterglow of GRB 081029
Creators: name: Nardini, M.
name: Greiner, J.
name: Kruehler, T.
name: Filgas, R.
name: Klose, S.
name: Afonso, P.
name: Clemens, C.
name: Guelbenzu, A. Nicuesa
name: E., F. Olivares
name: Rau, A.
name: Rossi, A.
name: Updike, A.
name: Yoldas, A. Kupcu
name: Yoldas, A.
name: Burlon, D.
name: Elliott, J.
name: Kann, D. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Context. After the launch of the Swift satellite, the Gamma-Ray Burst (GRB) optical light-curve smoothness paradigm has been questioned thanks to the faster and better sampled optical follow-up, which has unveiled a very complex behaviour. This complexity is triggering the interest of the whole GRB community. The GROND multi-channel imager is used to study optical and near-infrared (NIR) afterglows of GRBs with unprecedented optical and near-infrared temporal and spectral resolution. The GRB 081029 has a very prominent optical rebrightening event and is an outstanding example of the application of the multi-channel imager to GRB afterglows. Aims. Here we exploit the rich GROND multi-colour follow-up of GRB 081029 combined with XRT observations to study the nature of late-time rebrightenings that appear in the optical-NIR light-curves of some GRB afterglows. Methods. We analyse the optical and NIR observations obtained with the seven-channel Gamma-Ray burst Optical and Near-infrared Detector (GROND) at the 2.2 m MPI/ESO telescope and the X-ray data obtained with the XRT telescope on board the Swift observatory. The multi-wavelength temporal and spectral evolution is discussed in the framework of different physical models. Results. The extremely steep optical and NIR rebrightening observed in GRB 081029 cannot be explained in the framework of the standard forward shock afterglow model. The absence of a contemporaneous X-ray rebrightening and the evidence of a strong spectral evolution in the optical-NIR bands during the rise suggest two separate components that dominate in the early and late-time lightcurves, respectively. The steepness of the optical rise cannot be explained even in the framework of the alternative scenarios proposed in the literature unless a late-time activity of the central engine is assumed.
description: 9 pages, 7 figures, accepted for publication in Astronomy and Astrophysics