cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The variability of Sagittarius A* at 3 millimeter
Creators: name: Li, Juan
name: Shen, Zhi-Qiang
name: Miyazaki, Atsushi
name: Huang, Lei
name: Sault, R. J.
name: Miyoshi, Makoto
name: Tsuboi, Masato
name: Tsutsumi, Takahiro
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have performed monitoring observations of the 3-mm flux density toward the Galactic Center compact radio source Sgr A* with the Australia Telescope Compact Array since 2005 October. Careful calibrations of both elevation-dependent and time-dependent gains have enabled us to establish the variability behavior of Sgr A*. Sgr A* appeared to undergo a high and stable state in 2006 June session, and a low and variable state in 2006 August session. We report the results, with emphasis on two detected intra-day variation events during its low states. One is on 2006 August 12 when Sgr A* exhibited a 33% fractional variation in about 2.5 hr. The other is on 2006 August 13 when two peaks separated by about 4 hr, with a maximum variation of 21% within 2 hr, were seen. The observed short timescale variations are discussed in light of two possible scenarios, i.e., the expanding plasmon model and the sub-Keplerian orbiting hot spot model. The fitting results indicate that for the adiabatically expanding plasmon model, the synchrotron cooling can not be ignored, and a minimum mass-loss rate of 9.7*10^{-10}M_sun /yr is obtained based on parameters derived for this modified expanding plasmon model. Simultaneous multi-wavelength observation is crucial to our understanding the physical origin of rapid radio variability in Sgr A*.
description: 25 pages, 6 figures, accepted by ApJ
title: Bark Beetle-Induced Changes to Crown Fuel Flammability and Crown Fire Potential
Creators: name: Page, Wesley G
Publisher: name: Utah State University
Year: 2014

description: Recent outbreaks of mountain pine beetle (Dendroctonus ponderosae Hopkins) in lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests and spruce beetle (Dendroctonus rufipennis Kirby) in Engelmann spruce (Picea engelmannii Parry ex Engelm.) forests have affected vast areas across western North America. The highlevels of tree mortality associated with these outbreaks have raised concerns amongst fire managers and wildland firefighters about the effects of the tree mortality on fire behavior, particularly crown fire behavior, as crown fires hinder the ability of firefighters to conduct safe and effective fire suppression operations. Current information regarding crown fire dynamics in recently attacked forests is limited to results obtained from simulations employing either inappropriate and/or unvalidated fire behavior models
based on inadequate descriptions of crown fuel flammability. The purpose of this research was to measure and characterize the changes in crown fuel flammability caused y recent bark beetle attack and to describe the implications of these changes on crown fire potential in affected forests.
Results indicated that bark beetle attack causes a significant decline in moisture content and change in chemical composition in lodgepole pine and Engelmann spruce tree foliage, which substantially increases foliage flammability. Additionally, it was found that conventional models used to predict the moisture content of fine, dead surface fuels were inappropriate for predicting the moisture content of foliage on mountain pine beetle-attacked lodgepole pine trees during the red stage. Therefore, calibrated operational models and models based on diffusion theory were developed and evaluated that could accurately predict hourly fluctuations in moisture content. The implications of these changes on crown fire potential are dependent upon a host of site specific factors including outbreak duration, severity, and the specific stand characteristics. Based on our results, we believe that current fire behavior models, including popular semi-empirical and physics-based models, are currently inadequate for accurately predicting crown fire potential in forests recently attacked by bark beetles. In order to make significant progress in our understanding of crown fire potential in recently attacked forests, a substantial effort to document wildfire behavior in the field and/or to conduct experimental fires is needed.
The LVD Core Facility: a study of LVD as muon veto and active shielding for dark matter experiments
Creators: name: Selvi, Marco
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this study we explore the possibility of using the existing structure of a running experiment, the LVD supernova observatory at the INFN Gran Sasso National Laboratory, as an active shield and veto for the muon-induced background. In our vision LVD could become (without affecting in any way its main purpose of SN neutrino telescope) a host for a relatively compact but massive experiment looking for rare events. The empty volume that can be obtained removing 2 modules from the most internal part of the detector is 2.1m x 6.2m x 2.8m; we will call it LVD Core Facility (LVD-CF). We have evaluated the active vetoing and shielding power of LVD, with a detailed MC simulation (based on Geant4) of the detector and the rock that surrounds it. The results show that the flux of neutrons that are not associated with a visible muon in LVD is very low; it results reduced by a factor 50, equivalent to the one present in a much deeper underground laboratory, i.e. Sudbury. Moreover we present the results of on-going measurements about the gamma contamination inside the LVD-CF: it is reduced by a factor greater than 10 with respect to the one measured outside the LVD detector.
description: 5 pages, 4 figures, to appear in the proceedings of the Identification of Dark Matter conference (IDM2008), Stockholm, Sweden, 18-22 August, 2008
The Grand Old Janus, or the Political Legacy of Benjamin Disraeli (1804-1881)
Creators: name: Haggard, Robert
Publisher: name: Essays in History
Year: 1997

description: Review of Ian Machin, Disraeli, London: Longman, 1995, 194 pages; and Paul Smith, Disraeli: A Brief Life, New York: Cambridge University Press, 1996, 246 pages
description: Essays in History, Vol. 39 (1997)
Calibration of the CLTS and Verification of the Standard for the PT100 Temperature Sensors for the B0 Model Coil
Creators: name: F. Broggi
name: A. Paccalini
name: G. Rivoltella
Publisher: name: INFN Open Access Repository
Year: 2001

description: In this paper the LASA calibration facility for the temperature sensors is described.  After an overview of the most widely used temperature sensors in cryogenic applications, the calibration curves of some CLTS and Pt100 installed on the B0 model coil are reported and discussed. Then, by general considerations and from the specific results, the accuracy of every type of sensor is discussed. Good reading electronics is needed for accurate temperature measurements, especially for the Cryogenic Linear Temperature Sensors (CLTS). For CLTS the calibration is mandatory if used at low temperature. It is recommended to verify the characteristics of the Pt100, in order to check the standard of the sensors, either USA or EU. The calibration is necessary if good accuracy in the measurements is required and is anyway necessary if Pt100 are used at low temperature (below 60 K).
Angaben der Lehrenden für die Erstellung barrierefreier Videos
Creators: name: Wilkens, Leevke
name: Lüttmann, Finnja
name: Bender, Carsten
name: Bühler, Christian
Publisher: name: TU Dortmund
Year: 2023
Subjects: subject: Barrierefreie Videos
subject: 360
subject: 370
subject: Barrierefreiheit
subject: Video
subject: Lehre

description: Die Erstellung von barrierefreien Videos für die Lehre beinhaltet eine Reihe von Entscheidungen, welche Elemente mit in die Untertitelung (UT) und/oder Audiodeskription (AD) aufgenommen werden. Diese Entscheidungen werden häufig von Beschreiber*innen oder Redakteur*innen umgesetzt, die Ihre (fach-)didaktischen Zielsetzungen nicht kennen. Das nachfolgende Raster soll dabei helfen, dass die Entscheidungen der Beschreiber*innen mit Ihren Zielen übereinstimmen und keine Diskrepanz zwischen Didaktik und barrierefreier Umsetzung entsteht. Die Angaben, die Sie in diesem Raster geben, können dann bei der Umsetzung der Untertitelung und/oder Audiodeskription berücksichtigt werden.
title: Engaging Alternative High School Students Through the Design, Development, and Crafting of Computationally Enhanced Pets
Creators: name: DuMont, Maneksha Katrine
Publisher: name: Utah State University
Year: 2014

description: Hybrid design technologies, a combination of physical crafting, construction or art, and computing, have the potential to broaden participation in computing by appealing to youth through existing interests and hobbies. Expanding participation in computing is important because computational thinking, for example debugging, is a set of skills fundamental for success in our society. Youth can participate in and gain exposure to multiple disciplines with various hybrid design technologies. Yet alternative high school students, those labeled failing and been moved from the conventional school to a facility that focuses on building adult skills and remediated instruction, are not often the beneficiaries of innovative learning environments. There is reason to believe that these students could benefit from a new way of learning with new hybrid technologies including learning about debugging, art and craft, technology design, and aspects of computer programming.
This dissertation investigates whether a novel hybrid technology can provide alternative high school students with new forms of access to computation and encourage participation in debugging. This dissertation will serve as a multi-faceted report of one cycle of design, implementation, analysis, and refinement of a hybrid technology intervention with a diverse, oft ignored, and challenging population. In this project, students at an alternative high school worked to create interactive pets, similar to some commercially available, popular toys and then shared them with the community. The pets were virtual, existing on the computer screen, and tangible, existing in the physical world. Students worked predominantly by reusing and modifying existing programming code. In the end, there were a number of encouraging results, such as observed instances of high engagement, success in dealing with programming bugs, and the connections some students made to computing and mistake making. There were also some areas in which the design and implementation could be improved for future iterations, namely through refinement of the activities and technologies to encompass a wider range of student interests, a more concentrated effort to cultivate a nurturing community of designers, and a more consistent fostering of motivation for and understanding of the final product and its intended audience.
Data and code for "Assembly of functional diversity in an oceanic island flora"
Creators: name: Barajas Barbosa, Martha Paola
name: Craven, Dylan
name: Weigelt, Patrick
name: Otto, Rüdiger
name: Denelle, Pierre
name: Price, Jonathan
name: Fernandez Palacios, Jose Maria
name: Kreft, Holger
name: Diaz, Sandra
Publisher: name: figshare
Year: 2023
Subjects: Ecology not elsewhere classified
Ecosystem function

description: Here you can find the plant trait data collected for 80% of Tenerife native seed plants. We collected and measured eight plant traits during fieldwork campaigns in 2017 and 2018 in Tenerife. The data contains information about the native and endemism status (i.e., floristic information) of each of the species included in our analysis and that supports our findings (Barajas Barbosa et al 2023). Furthermore, here you can find the global plant trait data updated for this study. Please read the README file that accompanies the data for a detailed description of each data set included here. Lastly, we provide the code we programmed in R software version 4.1.0. to perform the analysis related to the publication titled "Assembly of functional diversity in an oceanic island flora".
Probing the momentum dependence of medium modifications of the nucleon-nucleon elastic cross sections
Creators: name: Li, Qingfeng
name: Shen, Caiwan
name: Di Toro, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The momentum dependence of the medium modifications on nucleon-nucleon elastic cross sections is discussed with microscopic transport theories and numerically investigated with an updated UrQMD microscopic transport model. The semi-peripheral Au+Au reaction at beam energy $E_b=400A$ MeV is adopted as an example. It is found that the uncertainties of the momentum dependence on medium modifications of cross sections influence the yields of free nucleons and their collective flows as functions of their transverse momentum and rapidity. Among these observables, the elliptic flow is sensitively dependent on detailed forms of the momentum dependence and more attention should be paid. The elliptic flow is hardly influenced by the probable splitting effect of the neutron-neutron and proton-proton cross sections so that one might pin down the mass splitting effect of the mean-field level at high beam energies and high nuclear densities by exploring the elliptic flow of nucleons or light clusters.
description: 13 pages, 6 figures, 1 table
title: A Comparison of Antlions, Bees, Darkling Beetles and Velvet Ants Across Sand Dune and Non-Sand Dune Habitats at Ash Meadows National Wildlife Refuge
Creators: name: Boehme, Nicole F.
Publisher: name: Utah State University
Year: 2014

description: Insects fulfill important roles within all ecosystems, including deserts, and interact directly and indirectly with the endemic and endangered species at the Ash Meadows National Wildlife Refuge (AMNWR). Here I investigate the variability of species richness, diversity, abundance and community composition of four insect groups between stabilized sand dune habitats, unstabilized sand dune habitats and non-sand dune habitats. The insects examined in this thesis include antlions (Myrmeleontidae), bees (Apiformes), darkling beetles (Tenebrionidae) and velvet ants (Mutillidae). As the impact and interactions of two of the insect groups, antlions and velvet ants, are largely unknown within any ecosystem, this thesis also includes a faunal study of velvet ants at AMNWR and their spatial and temporal variation at the refuge. Generalized linear mixed models were used to identify significant differences in richness, diversity and abundance for each insect group between the stabilized sand dune, unstabilized sand dune and non-sand dune habitats. Species richness differed between habitats for antlions, beetles and velvet ants over the study period. Diversity differed between habitats for antlions and beetles, and abundance differed between habitats for all groups over the study period. Nearly every habitat supported some unique species. The faunal survey of velvet ants revealed minor variation in flight times between species and a unique pattern of temporal niche partitioning in one species. Habitat preferences were observed for seven of 42 velvet ant species at AMNWR. In a comparison of the diversity of velvet ants between AMNWR and the Nevada Test Site (NTS), six velvet ant species that occurred at the NTS were not found at AMNWR. Diagnoses and a key are provided for the velvet ants of AMNWR. This thesis increases the number of known terrestrial invertebrates at the refuge and provides a comparison of terrestrial insect distribution and habitat use at AMNWR. These investigations contribute to the goals and objectives of the U. S. Fish and Wildlife Service to obtain basic inventories and understand the terrestrial habitat use of invertebrates at AMNWR.
title: Volatile Organic Compounds (VOCs) In Indoor Air: Emission From Consumer Products and the Use of Plants for Air Sampling
Creators: name: Wetzel, Todd A.
Publisher: name: Utah State University
Year: 2014

description: Indoor air concentrations of volatile organic compounds (VOCs), including many with documented adverse health effects, vary widely but are generally higher than found outdoors. Volatile organic compounds can enter indoor environments via internal (e.g. paints, paint strippers, fuels, cleaning supplies, pesticides, building materials, adhesives) and external sources (e.g. vapor intrusion (VI) from contaminated soil and/or groundwater and ambient air from automobiles and industrial facilities). Since many consumer products contain volatile organic compounds (VOCs) that are also the focus of soil and groundwater cleanup projects, emissions of these VOCs can lead to false source identifications during VI investigations. Laboratory-measured emissions of VOCs from several consumer products were used with a standard box model to predict indoor air concentrations. The predicted concentrations were compared to measured values generated by introducing the same consumer products into an actual residence. The screening level agreement between measured and estimated air concentrations suggests that a standard box model can be used with laboratory measured emission rates to show if an emission source can cause a potential health risk or lead to false assumption during VI investigations. The use of plant leaves as a simple, cost-effective and sustainable approach to sampling indoor air concentrations of VOCs was also investigated in three studies: 1) a headspace approach; 2) a flow-through glass and stainless steel plant growth chamber, and 3) a house-scale study where plant leaf and air concentrations of VOC were simultaneously measured. Similar relationships between the leaf and air concentrations observed in the three studies suggest that plant leaf concentrations can be used as a surrogate for indoor air concentrations of VOCs.
title: An Evaluation of the Relative Performance of Diploid Versus Triploid Brook Trout with Consideration of the Influence of Lake Characteristics
Creators: name: Dean, Andy
Publisher: name: Utah State University
Year: 2014

description: Triploid (sterile) trout potentially offer a more risk-averse option for stocking popular non-native sport fish; however the relative performance (e.g., survival and growth) of triploid versus diploid fish in natural settings is not well understood. I evaluated the relative performance of triploid versus diploid brook trout (Salvelinus fontinalis) stocked in high mountain Uinta lakes in response to food availability and lake morphology. I chose a set of 9 lakes that included a range of elevation and lake morphology. I observed no difference in CPUE or relative weight (Wr) of both types of trout in all lakes. Food availability (e.g., zooplankton and macroinvertebrates) varied substantially among lakes; however I observed no discernible difference between diploid and triploid diets, diet preference, or isotopic trophic signatures. Physical lake characteristics (e.g., dissolved oxygen [DO, mg/L] and temperature [°C]) were within or near optimal brook trout conditions (metabolically beneficial range) during the summer, but over-winter DO reached near lethal levels under the ice. In sum, between the two strains, I did not observe any significant differences in relative performance measured across a number of indices; however the size distribution of diploid fish was marginally (20 mm) skewed towards larger fish (a difference likely not great enough to be detectable by the average angler). In contrast to the similarity in performance between strains, I did observe considerable variability in performance of brook trout across lakes as a function of lake productivity, food availability, and most importantly fish density. Fish performance was greater in lakes with a lower density of stocked fish. Overall, the results from this study indicate triploid brook trout offer a viable and risk-averse alternative to stocking diploid fish in Uinta mountain lakes. Stocking triploid fish should decrease the threat of uncontrolled expansion into adjacent water bodies, while still allowing managers to maintain a popular non-native sport fishery.
Cosmic Ray Signatures from Decaying Gravitino Dark Matter
Creators: name: Bomark, N. -E.
name: Lola, S.
name: Osland, P.
name: Raklev, A. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the charged cosmic rays arising from the slow decay of gravitino dark matter within supersymmetric scenarios with trilinear R-parity violation. It is shown that operators of the LLE type can very well account for the recent anomalies in cosmic ray electron and positron data reported by PAMELA, ATIC and Fermi LAT, without violating any other bounds. This scenario will soon be tested by the Fermi LAT data on diffuse gamma ray emission.
description: To appear in the proceedings of EPS-HEP 2009, Krakow, Poland
The Realization of an Optic Fiber Air Backed Mandrel Hydrophone for Frequencies up to 20 KHz
Creators: name: M. Anghinolfi
name: A. Calvi
name: A. Cotrufo
name: M. Ivaldi
name: O. Yershova
name: F. Parodi
name: D. Piombo
name: A. Plotnikov
name: L. Repetto
Publisher: name: INFN Open Access Repository
Year: 2006

description: We describe how we have realized the prototype of an optic fiber air backed mandrel hydrophone designed to measure frequencies up to 20 kHz.  The characteristics of the materials we have selected, the procedure of winding the optic fibers and the coating process are described in detail.
Guide des pratiques exemplaires sur les métadonnées de Dataverse Nord v 3.0
Creators: name: Bascik, Teresa
name: Boisvert, Philippe
name: Cooper, Alexandra
name: Gagnon, Martine
name: Goodwin, Mark
name: Huck, John
name: Leahey, Amber
name: Stathis, Kelly
name: Steeleworthy, Michael
Publisher: name: Zenodo
Year: 2021
Subjects: gestion des données de recherche
Dataverse
métadonnées

description: Le logiciel du dépôt Dataverse se démarque par le grand nombre de champs de métadonnées qu'il fournit pour décrire les données de recherche. Ce guide est destiné à aider les utilisateurs, qu'ils soient novices ou expérimentés, à créer des métadonnées pour les ensembles de données dans un dépôt Dataverse. Il offre les définitions officielles des champs de métadonnées avec des clarifications et des conseils, il fait la distinction entre les champs obligatoires, recommandés et facultatifs et il illustre l'utilisation des champs par des exemples. Cette version du guide a été actualisée afin d'inclure la couverture de tous les champs de métadonnées disponibles — citation, information géospatiale, sciences sociales et humaines, astronomie et astrophysique, sciences de la vie, et métadonnées des revues. Le guide a été créé avec l'autorisation de Harvard pour l'utilisation des définitions et de la Texas Digital Library pour la conception de base. This guide is also available in English.
Quantum critical point in high-temperature superconductors
Creators: name: Shaginyan, V. R.
name: Amusia, M. Ya.
name: Popov, K. G.
name: Stephanovich, V. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, in high-T_c superconductors (HTSC), exciting measurements have been performed revealing their physics in superconducting and pseudogap states and in normal one induced by the application of magnetic field, when the transition from non-Fermi liquid to Landau Fermi liquid behavior occurs. We employ a theory, based on fermion condensation quantum phase transition which is able to explain facts obtained in the measurements. We also show, that in spite of very different microscopic nature of HTSC, heavy-fermion metals and 2D 3He, the physical properties of these three classes of substances are similar to each other.
description: 9 pages, 8 figures
Cosmic Ray Tests of the Prototype TPC for the ILC Experiment
Creators: name: Ackermann, K.
name: Arai, S.
name: Arogancia, D. C.
name: Bacala, A. M.
name: Ball, M.
name: Behnke, T.
name: Bito, H.
name: Eckardt, V.
name: Fujii, K.
name: Fusayasu, T.
name: Ghodbane, N.
name: Gooc, H. C.
name: Kijima, T.
name: Hamann, M.
name: Habu, M.
name: Heuer, R. -D.
name: Hiramatsu, K.
name: Ikematsu, K.
name: Kaukher, A.
name: Kuroiwa, H.
name: Janssen, M. E.
name: Kato, Y.
name: Kobayashi, M.
name: Kuhl, T.
name: Lux, T.
name: Matsuda, T.
name: Matsushita, S.
name: Miyazaki, A.
name: Nakamura, K.
name: Nitoh, O.
name: Ohta, H.
name: Reserva, R. L.
name: Sakai, K.
name: Sakamoto, N.
name: Sanuki, T.
name: Settles, R.
name: Sugiyama, A.
name: Takahashi, T.
name: Tomioka, T.
name: Tsuji, H.
name: Watanabe, T.
name: Wienemann, P.
name: Wurth, R.
name: Yamaguchi, H.
name: Yamaguchi, M.
name: Yamaguchi, A.
name: Yamamura, T.
name: Yamaoka, H.
name: Yazu, T.
name: Yonamine, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A time projection chamber (TPC) is a strong candidate for the central tracker of the international linear collider (ILC) experiment and we have been conducting a series of cosmic ray experiments under a magnetic field up to 4 T, using a small prototype TPC with a replaceable readout device: multi-wire proportional chamber (MWPC) or gas electron multiplier (GEM). We first confirmed that the MWPC readout could not be a fall-back option of the ILC-TPC under a strong axial magnetic field of 4 T since its spatial resolution suffered severely from the so called E x B effect in the vicinity of the wire planes. The GEM readout, on the other hand, was found to be virtually free from the E x B effect as had been expected and gave the resolution determined by the transverse diffusion of the drift electrons (diffusion limited). Furthermore, GEMs allow a wider choice of gas mixtures than MWPCs. Among the gases we tried so far a mixture of Ar-CF4-isobutane, in which MWPCs could be prone to discharges, seems promising as the operating gas of the ILC-TPC because of its small diffusion constant especially under a strong magnetic field. We report the measured drift properties of this mixture including the diffusion constant as a function of the electric field and compare them with the predictions of Magboltz. Also presented is the spatial resolution of a GEM-based ILC-TPC estimated from the measurement with the prototype.
description: 4 pages, 8 figures. Preprint submitted to TIPP09 Proceedings
The Association of REWP With Depressive Symptoms/Anhedonia
Creators: name: Riesel, Anja
name: Härpfer, Kai
name: Carsten, Hannes
name: Beauducel, André
name: Hennig, Juergen
name: Hewig, Johannes
name: Hildebrandt, Andrea
name: Kührt, Corinna
name: Lange, Leon
name: Mueller, Erik
name: Osinsky, Roman
name: Paul, Katharina
name: Porth, Elisa
name: Rodrigues, Johannes
name: Rommerskirchen, Lena
name: Short, Cassie
name: Stahl, Jutta
name: Strobel, Alexander
name: Wacker, Jan
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Clinical Psychology
subject: Personality and Social Contexts
subject: Experimental Analysis of Behavior
subject: Biological Psychology
subject: Cognitive Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Depression
subject: EEG
subject: Gambling
subject: Reward

description: Preregistration of Hypothesis in the CoScience Project.
Probing Interactions between Ultracold Fermions
Creators: name: Campbell, G. K.
name: Boyd, M. M.
name: Thomsen, J. W.
name: Martin, M. J.
name: Blatt, S.
name: Swallows, M. D.
name: Nicholson, T. L.
name: Fortier, T.
name: Oates, C. W.
name: Diddams, S. A.
name: Lemke, N. D.
name: Naidon, P.
name: Julienne, P.
name: Ye, Jun
name: Ludlow, A. D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: At ultracold temperatures, the Pauli exclusion principle suppresses collisions between identical fermions. This has motivated the development of atomic clocks using fermionic isotopes. However, by probing an optical clock transition with thousands of lattice-confined, ultracold fermionic Sr atoms, we have observed density-dependent collisional frequency shifts. These collision effects have been measured systematically and are supported by a theoretical description attributing them to inhomogeneities in the probe excitation process that render the atoms distinguishable. This work has also yielded insights for zeroing the clock density shift.
description: accepted to Science
title: Linking Temporal and Spatial Variability of Millennial and Decadal-Scale Sediment Yield to Aquatic Habitat in the Columbia River Basin
Creators: name: Portugal, Elijah
Publisher: name: Utah State University
Year: 2014

description: Eco-geomorphic interactions occur across a range of spatial and temporal scales from the level of the entire watershed to an individual geomorphic unit within a stream channel. Predicting the mechanisms, rates and timing of sediment production and storage in the landscape are fundamental problems in the watershed sciences. This is of particular concern given that excess sedimentation is considered a major pollutant to aquatic ecosystems. Rates of sediment delivery to stream networks are characteristically unsteady and non-uniform. Because of this, conventional approaches for predicting sediment yield provide incomplete and often inaccurate information. Terrestrial cosmogenic nuclides (TCNs) provide an estimate of spatially averaged rates of sediment yield from 101 to 104 km2 and temporally integrated from 103 to 105 years. Here, I used TCNs to constrain unsteadiness and non-uniformity of sediment yield within specific catchments of the Columbia River Basin (CRB). This is in combination with GIS analysis optically stimulated luminescence (OSL), Carbon-14 (C14) dating of fluvial deposits, and rapid geomorphic assessments.
Results showed an order of magnitude spatial variability in the rates of millennial-scale sediment yield at the scale of the entire CRB. At the broadest scale long-term rates of sediment yield generally are poorly predicted from topographic and environmental parameters. A notable exception is the observed positive correlation between mean annual precipitation and sediment yield. Where functional relationships exist, the nature of those relationships are scale and situation-dependent. In addition to the broadest scale, each smaller watershed (e.g., ~ 10 – 2,000 km2) has a distinct geologic, geomorphic, and disturbance history that sets the template for the modern sediment dynamics and the physical aspects of aquatic habitat. Chapter 2 presents results of broad-scale trends while Chapter 3 is comprised of case studies from smaller watersheds. Finally, Chapter 4 explores the relationship between long-term sediment yield and modern channel form.
Probing spin-charge separation in a Tomonaga-Luttinger liquid
Creators: name: Jompol, Y.
name: Ford, C. J. B.
name: Griffiths, J. P.
name: Farrer, I.
name: Jones, G. A. C.
name: Anderson, D.
name: Ritchie, D. A.
name: Silk, T. W.
name: Schofield, A. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In a one-dimensional (1D) system of interacting electrons, excitations of spin and charge travel at different speeds, according to the theory of a Tomonaga-Luttinger Liquid (TLL) at low energies. However, the clear observation of this spin-charge separation is an ongoing challenge experimentally. We have fabricated an electrostatically-gated 1D system in which we observe spin-charge separation and also the predicted power-law suppression of tunnelling into the 1D system. The spin-charge separation persists even beyond the low-energy regime where the TLL approximation should hold. TLL effects should therefore also be important in similar, but shorter, electrostatically gated wires, where interaction effects are being studied extensively worldwide.
description: 11 pages, 4 PDF figures, uses scicite.sty, Science.bst
There is no "Theory of Everything" inside E8
Creators: name: Distler, Jacques
name: Garibaldi, Skip
Publisher: name: arXiv
Year: 2009
Subjects: subject: Representation Theory (math.RT)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 22E47 (Primary), 17B25, 81R05, 83E15 (Secondary)

description: We analyze certain subgroups of real and complex forms of the Lie group E8, and deduce that any "Theory of Everything" obtained by embedding the gauge groups of gravity and the Standard Model into a real or complex form of E8 lacks certain representation-theoretic properties required by physical reality. The arguments themselves amount to representation theory of Lie algebras in the spirit of Dynkin's classic papers and are written for mathematicians.
description: Final version, to appear in Communications in Mathematical Physics. The main difference, from the previous version, is the creation of a new section, containing a response to Lisi's objections to our work
EJP RD meets OHDSI: enabling interoperability for rare disease research
Creators: name: Benis, Nirupama
name: de Groot, Rowdy
name: Alarcón, Pablo
name: Kaliyaperumal, Rajaram
name: Roos, Marco
name: Cornet, Ronald
name: Queralt-Rosinach, Núria
Publisher: name: Zenodo
Year: 2023

description: These are materials presented at the ISMB 2022 Bio-Ontologies track on mapping between a rare disease semantic data model and the OHDSI OMOP standard data model.
title: Traditional Lecture Versus an Activity Approach for Teaching Statistics: A Comparison of Outcomes
Creators: name: Loveland, Jennifer L.
Publisher: name: Utah State University
Year: 2014

description: Many educational researchers have proposed teaching statistics with less lecture and more active learning methods. However, there are only a few comparative studies that have taught one section of statistics with lectures and one section with activity-based methods; of those studies, the results are contradictory. To address the need for more research on the actual effectiveness of active learning methods in introductory statistics, this research study was undertaken.
An introductory, university level course was divided into two sections. One section was taught entirely with traditional lecture. The other section was taught using active learning methods and a minimal amount of lecture. Both sections were taught by the same instructor during the same semester. The experiment was repeated the next semester.
Students' exam scores were analyzed to determine if the activity-based teaching approach led to higher student comprehension and understanding of statistical concepts, and the ability to apply statistical procedures. Surveys were also administered to students to ascertain if the lecture or activity-based approach led to higher, more positive student attitudes toward statistics.
Analysis of the data did not show that the activity-based teaching method led to higher student comprehension or procedural ability. Neither teaching method led to signicantly higher student attitudes. Student comments indicated a positive response to the activity-based methods, but the responses also indicated a student desire for more teacher-centered time in the activity course.
Scalar hairs and exact vortex solutions in 3D AdS gravity
Creators: name: Cadoni, M.
name: Pani, P.
name: Serra, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate three-dimensional (3D) Anti-de Sitter (AdS) gravity coupled to a complex scalar field ϕwith self-interaction potential V(|ϕ|). We show that the mass of static, rotationally symmetric, AdS black hole with scalar hairs is determined algebraically by the scalar charges. We recast the field equations as a linear system of first order differential equations. Exact solutions, describing 3D AdS black holes with real spherical scalar hairs and vortex-black hole solutions are derived in closed form for the case of a scalar field saturating the Breitenlohner-Freedman (BF) bound and for a scalar field with asymptotic zero mass. The physical properties of these solutions are discussed. In particular, we show that the vortex solution interpolates between two different AdS_{3} vacua, corresponding respectively to a U(1)-symmetry-preserving maximum and to a symmetry-breaking minimum of the potential V.
description: 12 pages, 2 figures
Power Allocation Games for MIMO Multiple Access Channels with Coordination
Creators: name: Belmega, Elena Veronica
name: Lasaulce, Samson
name: Debbah, Merouane
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A game theoretic approach is used to derive the optimal decentralized power allocation (PA) in fast fading multiple access channels where the transmitters and receiver are equipped with multiple antennas. The players (the mobile terminals) are free to choose their PA in order to maximize their individual transmission rates (in particular they can ignore some specified centralized policies). A simple coordination mechanism between users is introduced. The nature and influence of this mechanism is studied in detail. The coordination signal indicates to the users the order in which the receiver applies successive interference cancellation and the frequency at which this order is used. Two different games are investigated: the users can either adapt their temporal PA to their decoding rank at the receiver or optimize their spatial PA between their transmit antennas. For both games a thorough analysis of the existence, uniqueness and sum-rate efficiency of the network Nash equilibrium is conducted. Analytical and simulation results are provided to assess the gap between the decentralized network performance and its equivalent virtual multiple input multiple output system, which is shown to be zero in some cases and relatively small in general.
description: Submitted to IEEE Transactions on Wireless Communications
RLUK Research Shift Programme: 1 Defining Practitioner Research
Creators: name: Nixon, William J
name: Scott, Becky (Rebecca)
name: Rodway, Cara
Publisher: name: Research Libraries UK (RLUK)
Year: 2025

description: The RLUK Research Shift Programme (RSP) is a new RLUK series of interconnected, interactive online events designed to empower and support librarians, archivists, information professionals, and colleagues across the Galleries, Libraries, Archives, and Museums (GLAM) sector to actively engage in research.

This session explored the concept and significance of practitioner research within the library, archive, and wider GLAM sector. 

William Nixon (RLUK) on the Research Shift Programme and Defining Practitioner Research.

Becky Scott (University of Hertfordshire, Libraries Connected) on Exploring definitions of practitioner research

Dr Cara Rodway (Head of Research Development, British Library) on Practice-based Research at the British Library

Through the Research Shift Programme and reseaarch activities, RLUK seeks to bring wider recognition to the pivotal contribution libraries make to the research process, as enablers, partners and leaders of research excellence.

Find out more at libraries X research
O seguro-garantia no âmbito do PL nº 1.292/1995
Creators: name: Fortini, Cristiana
Publisher: name: figshare
Year: 2021
Subjects: subject: 180103 Administrative Law
subject: FOS: Law

description: Por Cristiana Fortini e Rafael Amorim de Amorim A centralidade das "compras públicas" é reconhecida mundialmente. A despeito de orientações político-ideológicas de matizes distintas, de concepções não uniformes sobre as finalidades das licitações e, logo, de regras jurídicas que não são idênticas, todos os países realizam contratações públicas. O volume expressivo de recursos envolvidos, o risco de corrupção e os impactos positivos ou negativos que decorrem das contratações públicas para o agir estatal são usualmente referenciados como razões que justificam um olhar atento sobre o tema
The Force Between Giant Magnons
Creators: name: Dorey, Nick
name: Matos, Rui F. Lima
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the force and torque between well-separated, slowly-moving Giant Magnons with arbitrary orientations on S^5. We propose an effective Hamiltonian for Giant Magnons in this regime.
Evaluation of Ethiopian wheat rust trap nurseries against yellow rust (Puccinia striiformis f.sp. tritici) in Ethiopia
Creators: name: Daniel K.
name: Shumi R.
Publisher: name: gjrpublication
Year: 2025

description: Yellow (stripe) rust diseases caused by Puccinia striiformis f.sp is the most bottlenecks for wheat production in the highlands of Ethiopia.The field experiment was conducted to evaluate commercial cultivars, advanced and differential wheat lines for the resistance to prevailing rust populations and effectiveness of genes against the yellow rust races. Ethiopian wheat rust trap nursery (EWRTN) experiment was conducted in 2022 main cropping season across multiple yellow rust hot spot areas of Bekoji, Asassa, Kulumsa, Meraro, and Arsi Robe research stations. It encompassed a total of 81 commercial cultivars, candidates and 17 yellow rust differential lines. The experimental results showed that majority of durum wheat varieties exhibited moderately resistant to susceptible reaction to the current prevalent yellow rust race. Several commercially varieties of Meraro, Senkeagne, Tay, Tsehay, Bichan, Balcha, Daka, and candidate lines of BW-192346 and BW-192347 exhibited moderately resistance to the current dominant yellow rust patho-types across locations. The most popular bread wheat cultivars Kakaba, Shorima, Ogolcho, Kubsa, Hidassie, Kingbird, and Digalu, were highly susceptible to yellow rust disease that needs frequent application of fungicide to improve yield. Among the 17 differential lines Yr5, Yr10 and Yr15 maintained effective against the prevalent yellow rust races across all testing locations.
title: Konpetentzia digitalak. Graduko ikasleentzako formakuntza materialak: 2. Komunikazioa eta lankidetza 2.3. Teknologia digitalen bidezko lankidetza: 2.3.1. Lankidetza linean
title: Competencias digitales. Materiales de formación para estudiantes de grado: 2. Comunicación y colaboración 2.3. Colaboración mediante tecnologías digitales: 2.3.1. Trabajo colaborativo en línea
Creators: name: CRUE-REBIUN
name: Mondragon Unibertsitatea
Publisher: name: Mondragon Unibertsitatea
Year: 2020

description: - Lankidetza 
- Lankidetza linean 
- Lankidetza-tresnak linean: Tresnak hodeian, Ezaugarriak, Funtzioak
description: - Trabajo colaborativo
- Colaborar en línea
- Herramientas de colaboración en línea: Herramientas en la nube, Características, Funciones
title: An Exploratory Study of Purposeful and Strategic Communicative Techniques to Teach Vocabulary From Core Reading Programs to English Learners
Creators: name: Mieure, Danell Bench
Publisher: name: Utah State University
Year: 2014

description: This study explored the effect of implementing purposeful and strategic communicative techniques situated in aspects of the communicative approach to language learning when teaching vocabulary from a core reading program to English learners. Given the importance of vocabulary instruction and the widespread use of core reading programs, it is imperative such studies are conducted to determine effective instructional practices of vocabulary with core reading programs for English learners. Participants were 73 fifth-grade English learners nested in classrooms of 11 teachers who were randomly assigned to the instructional treatment group or to the comparison group. Both the treatment and comparison groups were taught vocabulary words from the districtadopted core reading program. The treatment group implemented an intervention specifically designed to teach vocabulary using several methods recommended in the research with the potential to increase vocabulary acquisition of English learners. The methods were used in a communicative approach to instruction, in which oral interaction was a main focus of the treatment. Student vocabulary acquisition was measured with a mastery test administered at the beginning and end of the study and with weekly quizzes. Additional data from classroom observations, teacher logs, and student work were collected on the fidelity of the implementation of the treatment and on the vocabulary instructional strategies used by the comparison group teachers. Linear regression analysis revealed a significant difference in growth of vocabulary skills from pretest to posttest between treatment and comparison groups (p = .001), with students in the treatment group showing greater progress than students in the comparison group. This study confirmed the effectiveness of implementing purposeful and strategic communicative techniques for successful vocabulary acquisition for English learners.
title: Electric Field Thresholds for Electroporation and Cell Death by Milli- To Nanosecond Pulses: How to Avoid Neuromuscular Stimulation in Cancer Ablation
Creators: name: Gudvangen, Emily
name: Pakhomov, Andrei G.
Publisher: name: Old Dominion University Libraries
Year: 2021

description: Pulsed electric field (PEF) ablation treatments utilize irreversible electroporation and are advantageous in their ability to target cellular components while leaving the vasculature and structural components intact. However, PEF therapies come with the known caveat of neuromuscular excitation outside of the ablation area, causing pain and involuntary muscle contraction. We performed a thorough examination of PEF ablation parameters, including pulse duration, pulse number, and frequency for both uni- and bipolar waveforms with the goal of minimizing neuromuscular excitation. This was done by measuring electroporation and ablation thresholds for 150 ns - 1 ms PEF, uni- and bipolar, delivered in 10-300 pulse trains at up to 1 MHz rates. The ratio between the measured ablation thresholds and already established nerve stimulation thresholds determines the span of neuromuscular effects beyond the ablated region. We found that this ratio is reduced more than 100-fold with the use of bipolar nanosecond-range PEF, in comparison to conventional methods using 100 µs unipolar pulses. This translates to a 10-fold reduction in the tissue radius excited by PEF treatments (see image). Additionally, packing nanosecond PEF into high-frequency bursts promises to reduce the number of neuromuscular responses with minimal impact on ablation efficacy. PEF ablation with bipolar nanosecond pulses is expected to produce far fewer neuromuscular side effects than conventional protocols for irreversible electroporation.