cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Best practices for the assessment of the public health effects of noise from proposed development projects
Creators: name: Raska, Andrea
Publisher: name: University of British Columbia
Year: 2018

description: Governments and organizations around the world are increasingly considering public health as part of planning, assessment, and decision making processes for large development projects, such as new transportation corridors or industrial facilities. To date, there are no established or consistent methods for the consideration of environmental noise in assessment processes for these projects. The overarching objective of this thesis is to identify best practices for considering the public health effects of environmental noise when assessing the potential impacts of development projects. The term “noise impact assessment” (NIA) is proposed, including a framework adapted from human health risk assessment and health impact assessment processes. Best practices for the NIA process were identified following a literature review in four key subject areas: (1) health effects of noise; (2) noise prediction/noise modeling; (3) practices in health impact assessment; and (4) practices in environmental impact assessment. Themes and lessons from the literature in each of the four key subject areas were identified and applied to the NIA framework. A total of thirteen best practices were identified. In particular, this work emphasizes the importance of assessing health impacts themselves in addition to noise exposure. It identifies the “percent [of people] highly annoyed [by noise]” (%HA) and “percent [of people] highly sleep disturbed [by noise]” (%HSD) metrics as recommended quantitative and objective measures of the adverse health effects of noise appropriate for use in NIA. At the same time, this work recommends a flexible assessment approach that considers both objective and subjective, acoustical and non-acoustical factors that impact human health, including noise level, community context, and noise sensitivity. Finally, this thesis argues against noise management as an appropriate focus of any noise reduction strategy because it has limited potential to meaningfully change noise exposures. While there is a broad literature relating to the health impacts of environmental noise, and numerous best practices for health impact assessment and human health risk assessment, this work is the first to bring these areas of research together and identify best practices for considering environmental noise in the assessment process for development projects.
Backbone-induced semiconducting behavior in short DNA wires
Creators: name: Cuniberti, Gianaurelio
name: Craco, Luis
name: Porath, Danny
name: Dekker, Cees
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: We propose a model Hamiltonian for describing charge transport through short homogeneous double stranded DNA molecules. We show that the hybridization of the overlapping $\pi$, orbitals in the base-pair stack coupled to the backbone is sufficient to predict the existence of a gap in the nonequilibrium current-voltage characteristics with a minimal number of parameters. Our results are in a good agreement with the recent finding of semiconducting behavior in short poly(G)-poly(C) DNA oligomers. In particular, our model provides a correct description of the molecular resonances which determine the quasi-linear part of the current out of the gap region.
European Cultural Route of Saints Cyril and Methodius
Creators: name: Kampouri, Zacharoula
Publisher: name: Zenodo
Year: 2020
Subjects: Cultural tourism, European cultural routes, Pilgrimage tourism, Cyril and Methodius, Cyrillic script.

description: ABSTRACT
 Cultural tourism is a special form of alternative tourism and it is regarded as a
 priority for European tourism policies as well. The concept of cultural routes is directly
 related with the concept of cultural tourism. Through a cultural route we become
 acquainted with the culture, the history and the local heritage of a place. These routes
 can also raise religious interest if the element of faith is involved. This thesis refers to
 the European cultural and pilgrimage route of Cyril and Methodius. Reference is made
 to the cultural and religious tourism and to the institutional framework regarding cultural
 routes. In this thesis is also presented the life and the contribution of Cyril and
 Methodius to the world of Slavs. Furthermore, statistics are provided about the foreign
 tourist arrivals in Greece and in general about the tourism in Thessaloniki. Finally are
 proposed ways of promoting the religious tourism in Thessaloniki in relation to the
 Saints Cyril and Methodius.
 Key words: Cultural tourism, European cultural routes, Pilgrimage tourism, Cyril and
 Methodius, Cyrillic script.
Prediction of high zT in thermoelectric silicon nanowires with axial germanium heterostructures
Creators: name: Shelley, Matthew
name: Mostofi, Arash A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the thermoelectric figure of merit, zT=S^2GT/(κ_l+κ_e), for p-type Si nanowires with axial Ge heterostructures using a combination of first-principles density-functional theory, interatomic potentials, and Landauer-Buttiker transport theory. We consider nanowires with up to 8400 atoms and twelve Ge axial heterostructures along their length. We find that introducing heterostructures always reduces S^2G, and that our calculated increases in zT are predominantly driven by associated decreases in κ_l. Of the systems considered, <111> nanowires with a regular distribution of Ge heterostructures have the highest figure-of-merit: zT=3, an order of magnitude larger than the equivalent pristine nanowire. Even in the presence of realistic structural disorder, in the form of small variations in length of the heterostructures, zT remains several times larger than that of the pristine case, suggesting that axial heterostructuring is a promising route to high-zT thermoelectric nanowires.
description: In print with Europhysics Letters (2011)
Recovery from alcoholism without religion
Creators: name: Hobkirk, Steven
Publisher: name: University of British Columbia
Year: 2018

description: Atheists have been paid little attention in the social sciences, particularly in the field of addiction recovery. An Alcoholics Anonymous (AA) support group, which puts emphasis on belief in God as a means to achieving sobriety, is often the first form of help that people struggling with alcoholism access. The purpose of this study is to provide a rich description of the experiences of atheists who attended AA as a part of their recovery from alcoholism. A semi-structured interview was conducted with four male participants who attended AA and do not believe in God. Thematic Content Analysis (TCA) was used to describe their experience by identifying themes in their stories. The following four themes were identified: religiosity a barrier, exploring personal responsibility, community and connection, and openness and growth. Suggestions for further research and implications for counselling professionals are discussed.
Relative luminosity measurement of the LHC with the ATLAS forward calorimeter
Creators: name: Afonin, A.
name: Akimov, A. V.
name: Barillari, T.
name: Bezzubov, V.
name: Blagov, M.
name: Braun, H. M.
name: Bruncko, D.
name: Chekulaev, S. V.
name: Cheplakov, A.
name: Degele, R.
name: Denisov, S. P.
name: Drobin, V.
name: Eckstein, P.
name: Ershov, V.
name: Evdokimov, V. N.
name: Ferencei, J.
name: Fimushkin, V.
name: Fischer, A.
name: Futterschneider, H.
name: Garkusha, V.
name: Glatte, A.
name: Handel, C.
name: Huber, J.
name: Javadov, N.
name: Kazarinov, M.
name: Khoroshilov, A.
name: Kiryunin, A. E.
name: Kladiva, E.
name: Kobel, M.
name: Komar, A. A.
name: Komogorov, M.
name: Kozelov, A.
name: Krupny, G.
name: Kukhtin, V.
name: Kulikov, S.
name: Kurchaninov, L. L.
name: Ladygin, E.
name: Lazarev, A. B.
name: Levin, A.
name: Mader, W. F.
name: Maslennikov, A. L.
name: Menke, S.
name: Merkulov, L.
name: Neganov, A.
name: Oberlack, H.
name: Oram, C. J.
name: Othegraven, R.
name: Peleganchuk, S. V.
name: Petrov, V.
name: Pivovarov, S.
name: Pospelov, G. E.
name: Prokopenko, N.
name: Rascvetalov, J.
name: Rusakovich, N.
name: Rutherfoord, J. P.
name: Salihagic, D.
name: Savine, A. Y.
name: Schacht, P.
name: Secker, H.
name: Seifert, F.
name: Seleznev, V.
name: Shaver, L.
name: Shilov, S.
name: Snesarev, A. A.
name: Soldatov, M.
name: Spalek, J.
name: Speransky, M.
name: Stoyanova, D.
name: Straessner, A.
name: Strizenec, P.
name: Sulin, V. V.
name: Talyshev, A.
name: Tapprogge, S.
name: Tikhonov, Yu. A.
name: Usov, Y.
name: Vadeev, V.
name: Vasiliev, I.
name: Walker, R.
name: Zeitnitz, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.
description: 16 pages
31866: A Whole Change of Life
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: The lockdown has meant a whole change of life. Not least of which is the kids at home all the time and getting them used to lessons at home. Fortunately for me, my wife is handling that for the most part. Actively taking walks - I like walking, but rarely would I 'go for a walk'. My public transport daily journey, plus lunchtime sandwich runs, usually takes me to 6-8000 steps a day. Not any more, now I actually'go for a walk'. I've seen roads and paths not seen before. And the etiquette of passing with 2m distance seems to be sporadically observed. Queuing for the supermarket - Queuing to get into the supermarket was strange. The staff trying their hardest to not get moaned at by ungrateful customers, and trying their hardest to not get Covid-19. Queues outside for everything now: supermarkets, value stores, pharmacies, off-licenses. Shaving - I'm not trying to grow a beard. It just kind of appeared when I stopped bothering to shave for a while. But I am trimming it so I look like I don't live under a bridge (as I am fortunate enough to not need to live under a bridge). Online meetings - I've always been a fan of Nexus Teams meetings, and now they've come into their own. They are usually productive and the tool is excellent. But it has brought unexpected side-effects: people in silhouette, cats on keyboards, "you need to unmute", kids' shouts in the background. And, of course, TEAMS BACKGROUNDS.
Mesoscale optical turbulence simulations above Dome C, Dome A and South Pole
Creators: name: Lascaux, Franck
name: Masciadri, Elena
name: Hagelin, Susanna
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: In two recent papers the mesoscale model Meso-NH, joint with the Astro-Meso-NH package, has been validated at Dome C, Antarctica, for the characterization of the optical turbulence. It has been shown that the meteorological parameters (temperature and wind speed, from which the optical turbulence depends on) as well as the Cn2 profiles above Dome C were correctly statistically reproduced. The three most important derived parameters that characterize the optical turbulence above the internal antarctic plateau: the surface layer thickness, the seeing in the free-atmosphere and in the total atmosphere showed to be in a very good agreement with observations. Validation of Cn2 has been performed using all the measurements of the optical turbulence vertical distribution obtained in winter so far. In this paper, in order to investigate the ability of the model to discriminate between different turbulence conditions for site testing, we extend the study to two other potential astronomical sites in Antarctica: Dome A and South Pole, which we expect to be characterized by different turbulence conditions. The optical turbulence has been calculated above these two sites for the same 15 nights studied for Dome C and a comparison between the three sites has been performed.
description: 13 pages, 5 figures, 9 tables, accepted in MNRAS
Развитие ювелирного ремесла Чернигова и его округи в Х веке
Creators: name: Орлов, Руслан
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430101
subject: Archaeological science

description: Орлов Р.С. Развитие ювелирного ремесла Чернигова и его округи в Х веке — Историко-археологический семинар “Чернигов и его округа в ІХ-ХІІІвв”: Тезисы докладов. Чернигов, с.52-55.
Coulomb blockade at a tunnel junction between two quantum wires with long range interaction
Creators: name: Sassetti, Maura
name: Cuniberti, Gianaurelio
name: Kramer, Bernhard
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: D. electron-electron interactions; D. electronic transport; D. tunneling; Coulomb blockade
subject: 530 Physik

description: The non-linear current-voltage characteristic of a tunnel junction between two Luttinger systems is calculated for an interaction with finite range. Coulomb blockade features are found. The dissipative resistance, the capacitance and the external impedance, which were introduced ad hoc in earlier theories, are obtained in terms of the electron-electron interaction. The frequency dependence of the impedance is given by the excitation spectrum of the electrons.
Evaluation of Safe Dynamic Updating on Collaborative BPMN Workflows With a Discrete-event Simulation: Dataset, Implementation, Measurements, and Analysis
Creators: name: Sokolowski, Daniel
name: Weisenburger, Pascal
name: Salvaneschi, Guido
Publisher: name: Zenodo
Year: 2022

description: This artifact bundles all evaluation resources related to the paper:
 Daniel Sokolowski, Pascal Weisenburger, Guido Salvaneschi. 2022. Change Is the Only Constant: Dynamic Updates for Workflows. In 44th International Conference on Software Engineering (ICSE '22), May 21-29, 2022, Pittsburgh, PA, USA. ACM, New York, NY, USA, 13 pages. https://doi.org/10.1145/3510003.3510065 It contains the following material: RePROSitory Dataset: A dataset of 106 realistic collaborative BPMN workflows, the dataset construction scripts, and a copy of the larger dataset (RePROSitory) they are drawn from. Simulation: The discrete-event simulation (DES) of safe dynamic software updating (DSU) for workflows, implemented in Scala 3. Measurements: CSV logs generated through the simulations used in the paper and a smaller measurement series used for lightweight demonstrations in this artifact. Evaluation: R notebook used for the analysis of the measurements and to generate the results and plots in the paper, including its rendered HTML version and PDF plots for all measurements in this artifact. Sensitivity Analysis: The execution script, rendered evaluation notebooks and plots, and a summary report of a parameter sensitivity analysis of the simulation. Monorepos Evaluation: Evaluation scripts and results on how many components a commit in a monorepo changes. Dockerfile: The file from which the provided Docker image is built. Please find more information in the README of the artifact. It also provides an overview of the remaining documentation.
Thermal Segregation Beyond Navier-Stokes
Creators: name: Brey, J. Javier
name: Khalil, Nagi
name: Dufty, James W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A dilute suspension of impurities in a low density gas is described by the Boltzmann and Boltzman-Lorentz kinetic theory. Scaling forms for the species distribution functions allow an exact determination of the hydrodynamic fields, without restriction to small thermal gradients or Navier-Stokes hydrodynamics. The thermal diffusion factor characterizing sedimentation is identified in terms of collision integrals as functions of the mechanical properties of the particles and the temperature gradient. An evaluation of the collision integrals using Sonine polynomial approximations is discussed. Conditions for segregation both along and opposite the temperature gradient are found, in contrast to the Navier-Stokes description for which no segregation occurs.
description: 9 figures
Black-hole horizons in modified space-time structures arising from canonical quantum gravity
Creators: name: Bojowald, Martin
name: Paily, George M.
name: Reyes, Juan D.
name: Tibrewala, Rakesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Several properties of canonical quantum gravity modify space-time structures, sometimes to the degree that no effective line elements exist to describe the geometry. An analysis of solutions, for instance in the context of black holes, then requires new insights. In this article, standard definitions of horizons in spherical symmetry are first reformulated canonically, and then evaluated for solutions of equations and constraints modified by inverse-triad corrections of loop quantum gravity. When possible, a space-time analysis is performed which reveals a mass threshold for black holes and small changes to Hawking radiation. For more general conclusions, canonical perturbation theory is developed to second order to include back-reaction from matter. The results shed light on the questions of whether renormalization of Newton's constant or other modifications of horizon conditions should be taken into account in computations of black-hole entropy in loop quantum gravity.
description: 43 pages, 3 figures
An Envision of Low Cost Mobile Adhoc Network Test Bed in a Laboratory Environment Emulating an Actual MANET
Creators: name: Mhala, Nitiket N.
name: Choudhari, N. K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Orchestrating a live field trial of wireless mobile networking involves significant cost and logistical issues relating to mobile platforms, support personnel, network and experiment automation and support equipment. The significant cost and logistics required to execute such a field trial can also be limiting in terms of achieving meaningful test results that exercise a practical number of mobile nodes over a significant set of test conditions within a given time. There is no argument that field trials are an important component of dynamic network testing. A field test of prototype will show whether simulations were on right track or not, but that's a big leap to take; going from the simulator directly to the real thing. In conceiving our work, we envisioned a mobile network emulation system that is low cost, flexible and controllable. This paper describes our wireless MANET test bed under development which emulates an actual MANET. Here, we focuses that, this test bed allows the users to automatically generate arbitrary logically network topologies in order to perform real time operations on adhoc network at a relatively low cost in a laboratory environment without having to physically move the nodes in the adhoc network. Thus, we try to "compress" wireless network so that it fits on a single table.
description: 12 Pages, IJCNC
A Library Hovering in the Chapel in Bogotá, Colombia
Creators: name: Karl-Johnson, Gabriella
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Academic libraries – Colombia
subject: Library buildings – Design and construction
subject: Church buildings – Remodelling for other use
subject: 020 Bibliotheks- und Informationswissenschaften

description: The chapter considers the potential of repurposing disused religious buildings for use as libraries and examines an exemplary model of library adaptive reuse in a cultural heritage context: La Capilla, the Biblioteca Satélite de Arquitectura y Diseño at Universidad de los Andes/University of the Andes (Uniandes) in Bogotá, Colombia. The author outlines the La Capilla project in detail, including the larger context of adaptive reuse in the Uniandes campus and in Bogotá. The architectural strategy used in the La Capilla conversion was an almost freestanding structural insertion placed inside an unaltered historic shell. The history of the Uniandes campus and the city of Bogotá is explored. Two other church to library conversion case studies are briefly examined to conclude that architectural intervention in culturally significant buildings can enhance public understanding of history while simultaneously serving library programmatic needs.
AC conductance of quantum wire with electron-electron interaction
Creators: name: Cuniberti, Gianaurelio
name: Sassetti, Maura
name: Kramer, Bernhard
Publisher: name: Universität Regensburg
Year: 1998
Subjects: subject: 530 Physik

description: The complex ac-response of a quasi-one dimensional electron system in the one-band approximation with an interaction potential of finite range is investigated. It is shown that linear response is exact for this model. The influence of the screening of the electric field is discussed. The complex absorptive conductance is analyzed in terms of resistive, capacitive and inductive behaviors.
Experimental evidence of ageing and slow restoration of the weak-contact configuration in tilted 3D granular packings
Creators: name: De Richter, Sébastien Kiesgen
name: Zaitsev, Vladimir
name: Richard, Patrick
name: Delannay, Renaud
name: Caër, Gérard Le
name: Tournat, Vincent
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Granular packings slowly driven towards their instability threshold are studied using a digital imaging technique as well as a nonlinear acoustic method. The former method allows us to study grain rearrangements on the surface during the tilting and the latter enables to selectively probe the modifications of the weak-contact fraction in the material bulk. Gradual ageing of both the surface activity and the weak-contact reconfigurations is observed as a result of repeated tilt cycles up to a given angle smaller than the angle of avalanche. For an aged configuration reached after several consecutive tilt cycles, abrupt resumption of the on-surface activity and of the weak-contact rearrangements occurs when the packing is subsequently inclined beyond the previous maximal tilting angle. This behavior is compared with literature results from numerical simulations of inclined 2D packings. It is also found that the aged weak-contact configurations exhibit spontaneous restoration towards the initial state if the packing remains at rest for tens of minutes. When the packing is titled forth and back between zero and near-critical angles, instead of ageing, the weak-contact configuration exhibits "internal weak-contact avalanches" in the vicinity of both the near-critical and zero angles. By contrast, the stronger-contact skeleton remains stable.
Factors Influencing Tennessee Adults’ Craft Hard Apple Cidery Visit Expenditures and Travel Distance
Creators: name: Jensen, Kimberly L.
name: Hughes, David L.
name: DeLong, Karen L.
name: Trejo-Pech, Carlos O.
name: Gill, Mackenzie B.
name: Jensen, Kimberly L.
name: Hughes, David L.
name: DeLong, Karen L.
name: Trejo-Pech, Carlos O.
name: Gill, Mackenzie B.
Publisher: name: Unknown
Year: 2021
Subjects: subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: hard cider
subject: cidery
subject: visitors
subject: expenditures
subject: travel
subject: distance

description: The craft hard apple cider industry is emerging in many areas of the United States, including Tennessee. Few studies exist regarding consumer preferences for visiting hard apple cider facilities (cideries). This study used a representative statewide survey of Tennessee alcoholic beverage consumers to examine their prior cidery visits, factors influencing cidery purchases, and expected expenditures and preferred travel distance to cideries. Most respondents had not visited a local cidery, but among those who had, most made hard apple cider purchases. Respondents stated they would travel about 61 miles to visit a cidery and spend about $38 annually while visiting cideries.
Effect of Band Structure on Quantum Interference in Multiwall Carbon Nanotubes
Creators: name: Stojetz, Bernhard
name: Miko, Csilla
name: Forro, Laszlo
name: Strunk, Christoph
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We report conductance measurements on multiwall carbon nanotubes in a perpendicular magnetic field. A gate electrode with large capacitance is used to considerably vary the nanotube Fermi level. This enables us to search for signatures of the unique electronic band structure of the nanotubes in the regime of diffusive quantum transport. We find an unusual quenching of the magnetoconductance and the zero bias anomaly in the differential conductance at certain gate voltages, which can be linked to the onset of quasi-one-dimensional subbands.
Production of spectator hypermatter in relativistic heavy-ion collisions
Creators: name: Botvina, A. S.
name: Gudima, K. K.
name: Steinheimer, J.
name: Bleicher, M.
name: Mishustin, I. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We study the formation of large hyper-fragments in relativistic heavy-ion collisions within two transport models, DCM and UrQMD. Our goal is to explore a new mechanism for the formation of strange nuclear systems via capture of hyperons by relatively cold spectator matter produced in semi-peripheral collisions. We investigate basic characteristics of the produced hyper-spectators and evaluate the production probabilities of multi-strange systems. Advantages of the proposed mechanisms over an alternative coalescence mechanism are analysed. We also discuss how such systems can be detected taking into account the background of free hyperons. This investigation is important for the development of new experimental methods for producing hyper-nuclei in peripheral relativistic nucleus-nucleus collisions, which are now underway at GSI and are planned for the future FAIR and NICA facilities.
description: 28 pages, including 10 figures. Submitted to Phys. Rev. C
Guided nucleation of superconductivity on a graded magnetic substrate
Creators: name: Milošević, M. V.
name: Gillijns, W.
name: Silhanek, A. V.
name: Libál, A.
name: Moshchalkov, V. V.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate the controlled spatial nucleation of superconductivity in a thin film deposited on periodic arrays of ferromagnetic dots with gradually increasing diameter. The perpendicular magnetization of the dots induces vortex-antivortex molecules in the sample, with the number of (anti)vortices increasing with magnet size. The resulting gradient of antivortex density between the dots predetermines local nucleation of superconductivity in the sample as a function of the applied external field and temperature. In addition, the compensation between the applied magnetic field and the antivortices results in an unprecedented enhancement of the critical temperature.
Transient-pulse nonlinear spectroscopy with the radiation of a multimode THz gas laser
Creators: name: Klappenberger, Florian
name: Renk, Karl Friedrich
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: far-infrared detection; multimode THz laser; nonlinear far-infrared spectroscopy
subject: 530 Physik

description: We report on transient-pulse nonlinear spectroscopy with the radiation of a multimode THz gas laser. The method is demonstrated for studying the nonlinear response of a current-carrying superlattice to THz radiation; the current through a superlattice can be suppressed by a strong THz field. The method makes use of the pulses of a high power multimode THz gas laser. By splitting the laser beam for selected laser modes into a main beam and a reference beam we monitored with a reference detector the transient power in the main beam. The simultaneous measurement of both the instantaneous response and the instantaneous power allows to obtain the power dependence of the response within a single laser pulse. The method is suitable to study the nonlinear response of matter to THz radiation fields in a large dynamic range.
Interleaved Parton Showers and Tuning Prospects
Creators: name: Corke, Richard
name: Sjöstrand, Torbjörn
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: General-purpose Monte Carlo event generators have become important tools in particle physics, allowing the simulation of exclusive hadronic final states. In this article we examine the Pythia 8 generator, in particular focusing on its parton-shower algorithms. Some relevant new additions to the code are introduced, that should allow for a better description of data. We also implement and compare with 2 to 3 real-emission QCD matrix elements, to check how well the shower algorithm fills the phase space away from the soft and collinear regions. A tuning of the generator to Tevatron data is performed for two PDF sets and the impact of first new LHC data is examined.
Frequency multiplication of microwave radiation by propagating space-charge domains in a semiconductor superlattice
Creators: name: Scheuerer, R.
name: Häußler, M.
name: Renk, Karl Friedrich
name: Schomburg, Ekkehard
name: Koschurinov, Y.
name: Pavelev, Dimitri
name: Maleev, N.
name: Ustinov, V.
name: Zhukov, A.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We report on frequency multiplication of microwave radiation by propagating space-charge domains in a semiconductor superlattice; the domains were due to a negative differential mobility of miniband electrons. We irradiated an arrangement of two GaAs/AlAs superlattices, mounted in a rectangular waveguide system, with microwave radiation (frequency near 70 GHz) and observed the generation of harmonics; the conversion of radiation power to the third harmonic showed a remarkable efficiency (5%). A theoretical study, based on a drift-diffusion model for the miniband electrons, suggests that the microwave radiation has driven the formation and annihilation of space-charge domains and that the resulting anharmonic current was the source of the frequency-multiplied radiation. Our results indicate that frequency multiplication by space-charge domains in a semiconductor superlattice can be exploited for efficient generation of submillimeter-wave radiation.
Semiconductor-superlattice frequency multiplier for generation of submillimeter waves
Creators: name: Klappenberger, Florian
name: Renk, Karl Friedrich
name: Renk, P.
name: Rieder, Bernhard
name: Koschurinov, Y.
name: Pavelev, Dimitri
name: Ustinov, V.
name: Zhukov, A.
name: Maleev, N.
name: Vasilyev, A.
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: We report on a semiconductor–superlattice frequency multiplier for the generation of submillimeter waves. A monochromatic microwave-pump field (frequency near 100 GHz) periodically excited a superlattice into states of negative differential conductivity giving rise to space-charge domain creation and annihilation joint with a nonsinusoidal high-frequency current and radiation at harmonics of the pump field. A highly doped GaAs/AlAs superlattice allowed the conversion of pump to third-harmonic radiation at 300 GHz with an efficiency of about 1% (power~30 µW).
Amplification of a terahertz field in a semiconductor superlattice via phase-locked-k-space bunches of Bloch oscillating electrons
Creators: name: Schomburg, Ekkehard
name: Demarina, Nataliya
name: Renk, Karl Friedrich
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: Applying a Monte Carlo technique for the simulation of the dynamics of electrons in a semiconductor superlattice, we studied the action of a terahertz field on the motion of electrons by performing Bloch oscillations subject to inelastic scattering. We found that, due to polar optic phonon emission, the Bloch oscillating electrons can form k-space bunches phase locked to the terahertz field. For frequencies smaller than the Bloch frequency, this gives rise to the amplification of the terahertz field. Our study may contribute to the development of a Bloch laser for terahertz radiation.
Excitation, two-center interference and the orbital geometry in laser-induced nonsequential double ionization of diatomic molecules
Creators: name: Shaaran, T.
name: Augstein, B. B.
name: Faria, C. Figueira de Morisson
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the influence of the molecular orbital geometry and of the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules for different molecular species, namely $\mathrm{N}_2$ and $\mathrm{Li}_2$. We focus on the recollision excitation with subsequent tunneling ionization (RESI) mechanism, in which the first electron, upon return, promotes the second electron to an excited state, from where it subsequently tunnels. We show that the electron-momentum distributions exhibit interference maxima and minima due to the electron emission at spatially separated centers. We provide generalized analytical expressions for such maxima or minima, which take into account $s$ $p$ mixing and the orbital geometry. The patterns caused by the two-center interference are sharpest for vanishing alignment angle and get washed out as this parameter increases. Apart from that, there exist features due to the geometry of the lowest occupied molecular orbital (LUMO), which may be observed for a wide range of alignment angles. Such features manifest themselves as the suppression of probability density in specific momentum regions due to the shape of the LUMO wavefunction, or as an overall decrease in the RESI yield due to the presence of nodal planes.
description: 11 pages revtex, 2 figures
Exploring the information contexts of young fathers in two British Columbian cities
Creators: name: Mniszak, Caroline
Publisher: name: University of British Columbia
Year: 2018

description: Young fathers are situated in a unique information context and have specific information needs which have not been explored in research to date. There are disproportionate amounts of services and information resources available for young mothers versus young fathers; this imbalance of supports reflects gendered inequalities in parenting by assuming that the mother is the primary caregiver. Using data from the longitudinal Young Parents Study, this thesis explores the information contexts of young fathers and shows that young fathers encounter exclusion from parenting documents, young parent programs and services and from their communities. It is the conjecture of this thesis that young fathers are often overlooked as parents due to the gendered nature of parenting information delivery. Young fathers also encounter challenges asking for help with parenting, in part due to masculine gender role values such as self-reliance. This thesis also compiles responses from young fathers and service providers proposing interventions to improve information access for young dads at services, with the intention that being informed fathers will enable them to be more empowered parents.
Vortex manipulation in a superconducting matrix with view on applications
Creators: name: Milošević, M. V.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show how a single flux quantum can be effectively manipulated in a superconducting film with a matrix of blind holes. Such a sample can serve as a basic memory element, where the position of the vortex in a [k x l] matrix of pinning sites defines the desired combination of n bits of information (2^n=k*l). Vortex placement is achieved by strategically applied current and the resulting position is read-out via generated voltage between metallic contacts on the sample. Such a device can also act as a controllable source of a nanoengineered local magnetic field for e.g. spintronics applications.
The spin-dependent semiconductor Bloch equations: a microscopic theory of Bir-Aronov-Pikus spin-relaxation
Creators: name: Lechner, Christian
name: Rössler, Ulrich
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: Semiconductor Bloch equations, in their extension including the spin degree of freedom of the carriers, are capable to describe spin dynamics on a microscopic level. In the presence of free holes, electron spins can flip simultaneously with hole spins due to electron-hole exchange interaction. This mechanism named after Bir, Aronov and Pikus, is described here by using the extended semiconductor Bloch equations and considering carrier-carrier interaction beyond the Hartree-Fock truncation. As a result we derive microscopic expressions for spin-relaxation and spin-dephasing rates.
Relatively Prime Polynomials and Nonsingular Hankel Matrices over Finite Fields
Creators: name: Armas, Mario Garcia
name: Ghorpade, Sudhir R.
name: Ram, Samrith
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11T06, 11T35, 15B05

description: The probability for two monic polynomials of a positive degree n with coefficients in the finite field F_q to be relatively prime turns out to be identical with the probability for an n x n Hankel matrix over F_q to be nonsingular. Motivated by this, we give an explicit map from pairs of coprime polynomials to nonsingular Hankel matrices that explains this connection. A basic tool used here is the classical notion of Bezoutian of two polynomials. Moreover, we give simpler and direct proofs of the general formulae for the number of m-tuples of relatively prime polynomials over F_q of given degrees and for the number of n x n Hankel matrices over F_q of a given rank
description: 10 pages; to appear in the Journal of Combinatorial Theory, Series A
Supermarket Pricing and Promotional Behavior: Evidence from the San Luis Obispo Market
Creators: name: Volpe, Richard J.
name: Tedjasaputra, Nicole
name: Jackson, Olivia
name: Provost, Ryan
name: Volpe, Richard J.
name: Tedjasaputra, Nicole
name: Jackson, Olivia
name: Provost, Ryan
Publisher: name: Unknown
Year: 2021
Subjects: subject: Demand and Price Analysis
subject: food prices
subject: food retail
subject: pricing behavior
subject: retail behavior

description: We collected price and promotional data from seven supermarkets operating in San Luis Obispo, CA, for one year, from 2017 to 2018. Using the data, we created a series of variables to measure prices and promotional activity. These variables were subjected to an exploratory regression analysis. The research uncovered a number of findings that help explain price variation in supermarkets and motivate future research. Average prices, price variation, promotional frequency, and promotional depth are all interrelated in important, and in some cases unexplored, ways.
Relational Dynamics in Perception: Impacts on trial-to-trial variation
Creators: name: Marom, Shimon
name: Wallach, Avner
Publisher: name: arXiv
Year: 2011
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: We show that trial-to-trial variability in sensory detection of a weak visual stimulus is dramatically diminished when rather than presenting a fixed stimulus contrast, fluctuations in a subject's judgment are matched by fluctuations in stimulus contrast. This attenuation of fluctuations does not involve a change in the subject's psychometric function. The result is consistent with the interpretation of trial-to-trial variability in this sensory detection task being a high-level meta-cognitive control process that explores for something that our brains are so used to: subject-object relational dynamics.
description: 11 pages, 3 figures
Electric-field-induced reversible avalanche breakdown in a GaAs microcrystal due to cross band gap impact ionization
Creators: name: Klappenberger, Florian
name: Renk, Karl Friedrich
name: Summer, R.
name: Keldysh, Leonid
name: Rieder, Bernhard
name: Wegscheider, Werner
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We report on a reversible avalanche breakdown due to free-carrier multiplication caused by cross band gap impact ionization in a GaAs microcrystal. The n GaAs microcrystal (length 1 µm, diameter 1 µm) was embedded between n+ GaAs layers serving as electric contacts. We guided an electric pulse to the sample and determined, from the reflected and transmitted pulse, the I(V) characteristic. The breakdown was indicated by a sudden current rise and voltage drop and a hysteresis effect and, furthermore, by electron-hole recombination radiation. We reached the threshold field for ionization by making use of a high-field domain whose formation was based on the Gunn effect. The microcrystal could reproducibly be switched into the nonequilibrium avalanche state. Our analysis indicates that the effect provides a basis for the development of an ultrafast electric switch.
Particulate air pollution data for Coimbatore, India: real time monitoring and modeling with data-interoperability measures
Creators: name: A, Nishadh K
Publisher: name: Zenodo
Year: 2017

description: Particulate air pollution is a major health burden and environmental concern in urban areas. As
 a serious health problem in urban areas, current intervention measures has to be sufficiently
 refined for urgent and sustainable management. Data intensive approach can gives tools
 to integrate diverse data sources for deriving decision-making information and improved
 applications for adaptive management of pollution. However lack of spatio-temporally relevant
 and reliable data on particulate pollution and the data existing in non-interoperable formats to a
 great extent hampers knowledge generation for effective control of pollution and management
 of air quality.
 The current study focused on developing basic tools for data intensive approach in a second
 tier urban centre of India. The study intends to explore an affordable real time air quality
 information systems focusing on Coimbatore, a fast growing and second tier urban center in
 the state of Tamil Nadu, India and its surroundings as the study area. The major objectives of
 the study were (1) to develop a real time particulate pollution monitoring system using low
 cost commodity sensors and assess its effectiveness in the study area, (2) attempt a real time
 particulate pollution modeling system for the study area using WRF-CHEM, addressing its
 computational requirements, and (3) demonstrate application of interoperability measures on
 real time particulate pollution data.
 To address the first objective, a real time particulate monitor was developed by integrating
 off-the-shelf indoor dust sensors with an appropriately customized data communication system.
 To address the objective two, as an essential data requirement for WRF-CHEM modeling,
 particulate matter (PM 2.5 and PM 10 ) emission inventory was prepared for the study area.
 Programming tools (codes) were developed for remote computing based real time execution
 and evaluation of model performance over the study area using the developed emission inventory.
 Objective three of the study was addressed using sensor web enablement specification and
 its application. Web based data dissemination and application of statistical analysis tools
 were used to demonstrate the advantages of interoperability measures on real time particulate
 pollution data in the study area.
Hydrodynamic simulations with the Godunov SPH
Creators: name: Murante, Giuseppe
name: Borgani, Stefano
name: Brunino, Riccardo
name: Cha, Suneg-Hoon
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present results based on an implementation of the Godunov Smoothed Particle Hydrodynamics (GSPH), originally developed by Inutsuka (2002), in the GADGET-3 hydrodynamic code. We first review the derivation of the GSPH discretization of the equations of moment and energy conservation, starting from the convolution of these equations with the interpolating kernel. The two most important aspects of the numerical implementation of these equations are (a) the appearance of fluid velocity and pressure obtained from the solution of the Riemann problem between each pair of particles, and (b the absence of an artificial viscosity term. We carry out three different controlled hydrodynamical three-dimensional tests, namely the Sod shock tube, the development of Kelvin-Helmholtz instabilities in a shear flow test, and the "blob" test describing the evolution of a cold cloud moving against a hot wind. The results of our tests confirm and extend in a number of aspects those recently obtained by Cha (2010): (i) GSPH provides a much improved description of contact discontinuities, with respect to SPH, thus avoiding the appearance of spurious pressure forces; (ii) GSPH is able to follow the development of gas-dynamical instabilities, such as the Kevin--Helmholtz and the Rayleigh-Taylor ones; (iii) as a result, GSPH describes the development of curl structures in the shear-flow test and the dissolution of the cold cloud in the "blob" test. We also discuss in detail the effect on the performances of GSPH of changing different aspects of its implementation. The results of our tests demonstrate that GSPH is in fact a highly promising hydrodynamic scheme, also to be coupled to an N-body solver, for astrophysical and cosmological applications. [abridged]
description: 19 pages, 13 figures, MNRAS accepted, high resolution version can be obtained at http://adlibitum.oats.inaf.it/borgani/html/papers/gsph_hydrosim.pdf