cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Charged pion photoproduction with the Delta(1232) baryon beyond the resonance region
Creators: name: Nam, Seung-il
name: Yu, Byung-Geel
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the charged pion photoproduction off the proton target with the Delta(1232) baryon in the final state, i.e. gamma p -> pi^- Delta^++(1232) and gamma p -> pi^+ Delta^0(1232), based on the effective Lagrangian method, beyond the resonance region, E_cm >~ GeV. We employ the pi- and rho-meson Regge trajectories in the t-channel, in addition to the proton- and Delta-pole, in the s- and u-channels respectively, and the contact-interaction contributions. A specific scheme for the form factor which satisfies the Ward-Takahashi identity, crossing symmetry, and on-shell condition, is taken into account. To discuss the validity of the Regge approach within the Effective Lagrangian method, we also consider a smooth interpolation between the Regge- and Feynman-propagators for the t-channel meson exchanges as a function of sqrt(s). We present the numerical results for the energy and angular dependences of the cross sections, and double-polarization observable. It turns out that the present framework shows the significance of the pi-exchange and contact interaction terms to reproduce the experimental data qualitatively well. Especially, the interpolation between the two propagators plays a crucial role to reproduce the high-energy experimental data. The pi^+ decay-angle distribution is also studied using the Delta^++ decay frame, i.e. the Gottfried-Jackson frame. The present results will be a useful guide for future high-energy photon-beam experiments.
description: 14 pages, 24 figures
Glacial geomorphology of the Gaick, Central Grampians, Scotland
Creators: name: M. P. Chandler, Benjamin
name: Lukas, Sven
name: Boston, Clare M.
name: Merritt, Jon W.
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: The Gaick is an enigmatic glaciated landscape in the Central Grampians, Scotland, dominated by an expansive dissected plateau. Previous studies have postulated widely differing interpretations of the glacial landforms and current understanding of the glacial events in this area is partly restricted by the absence of detailed glacial geomorphological mapping. To address this issue, we present a comprehensive 1: 46,000-scale glacial geomorphological map, covering an area of ∼520 km2. A combination of detailed field mapping and interpretation of aerial photographs and Digital Surface Models (DSMs) has revealed a variety of glacial, periglacial and fluvial landforms, including an abundance of moraines and meltwater channels within valleys. We also identify a glacial sediment-landform assemblage, dissected glaciogenic material, that has not previously been reported in the Scottish Highlands. The geomorphological map provides the necessary foundation for elucidating the extent, dynamics and timing of former glaciation in the area.
Human papillomavirus and oropharyngeal cancer in British Columbia
Creators: name: Lu, David
Publisher: name: University of British Columbia
Year: 2018

description: Oropharyngeal squamous cell carcinoma (OpSCC) patients have improved survival when tested positive for high-risk human papillomavirus (HR-HPV). However, tissue assessment of HPV status is currently not standardized and additional factors may influence survival among HPV-positive patients. The main objectives were to evaluate HPV detection methods and to identify possible factors that impact survival of OpSCC patients in British Columbia. We retrospectively analyzed 972 primary OpSCC patients diagnosed between 2000-2008 and referred to the BC Cancer Agency for treatment with curative intents of radiotherapy with or without concurrent chemotherapy. Patient charts were reviewed and collected information for demographics, smoking history, clinical assessments, treatment received, and outcomes. We analyzed two cohorts of Study Cohort, 244 cases with enough formalin-fixed, paraffin-embedded (FFPE) tissues for experiment, and General Cohort, 728 cases without tissues available. Experimental procedures included in situ hybridization (ISH) to detect DNA and RNA HPV and immunohistochemistry (IHC) to detect p16, p53, the retinoblastoma protein (pRB), cyclin D1, and Ki67. We used polymerase chain reaction (PCR) to detect type-specific HPV from cases with enough FFPE tissues for DNA extraction (n=41). Cox proportional hazard (Cox-PH) and Kaplan-Meier (KM) survival analysis were conducted to identify potential clinical and biological factors impacting on 5-year overall survival (OS), disease-specific survival (DSS), and development of loco-regional recurrence (LRR). The incidence rates of males increased from 3.2 to 7.6 per 100,000 whereas females declined from 1.1 to 0.8 per 100,000. The Study Cohort was relatively representative of the General Cohort. The Study Cohort of patients classified as ever-smokers, had tumours staged at T3/4, and received radiotherapy only had poorer 5-year OS, DSS, and LRR (p<0.05). HPV was detected in 77.6% of patients. Using PCR as standard, DNA/RNA ISH to detect HPV was more specific than IHC p16. Stratification of patients by HPV status showed that HPV-positive/p53-positive and HPV-negative/cyclin D1-positive patients had significantly poorer DSS (p=0.03) and 5-year OS (p=0.02), respectively. In conclusion, both HPV burden and its prognostic significance were found in BC. ISH assessment may be used to determine HPV status. IHC assessments of p53 or cyclin D1 status may be prognostic indicators to guide treatment.
High-resolution bathymetry of the Alderney Race and its geological and sedimentological description (Raz Blanchard, northwest France)
Creators: name: Furgerot, Lucille
name: Poprawski, Yohann
name: Violet, Marc
name: Poizot, Emmanuel
name: Bois, Pascal Bailly du
name: Morillon, Mehdi
name: Mear, Yann
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: We present a high-resolution 1:15,000 bathymetric map (Main map) of Alderney Race located offshore of northwestern France, with the strongest currents in Europe. We use this map, underwater video transects and Shipek grabs to improve geological maps previously published. We distinguished Proterozoic crystalline rocks, Paleozoic and Cretaceous sedimentary rocks on the present-day sea floor. Some structures as faults and folds are also mapped. We identified a Quaternary cover made of pebbles, boulders and blocks interpreted as corestones resulting in differential erosion and alteration of the substratum. This cover is commonly encrusted by fixed fauna, such as bryozoans and barnacles. Finally, we describe the present-day mobile sediment cover characterized by sand patches and pebble dune fields (up to 10 m in height). Our videos show the presence of mobile fine-grained sediment patches under the resolution of our map lying between the cobble and pebble cover. We summarize our interpretations on a non-exhaustive geological-sedimentary map.
PT-symmetric quantum state discrimination
Creators: name: Bender, Carl M.
name: Brody, Dorje C.
name: Caldeira, Joao
name: Meister, Bernard K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Suppose that a system is known to be in one of two quantum states, $|ψ_1 > $ or $|ψ_2 >$. If these states are not orthogonal, then in conventional quantum mechanics it is impossible with one measurement to determine with certainty which state the system is in. However, because a non-Hermitian PT-symmetric Hamiltonian determines the inner product that is appropriate for the Hilbert space of physical states, it is always possible to choose this inner product so that the two states $|ψ_1 > $ and $|ψ_2 > $ are orthogonal. Thus, quantum state discrimination can, in principle, be achieved with a single measurement.
description: 4 pages, no figures
First Detection of Ar-K Line Emission from the Cygnus Loop
Creators: name: Uchida, H.
name: Tsunemi, H.
name: Tominaga, N.
name: Katsuda, S.
name: Kimura, M.
name: Kosugi, H.
name: Takahashi, H.
name: Takakura, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We observed the Cygnus Loop with XMM-Newton (9 pointings) and Suzaku (32 pointings) between 2002 and 2008. The total effective exposure time is 670.2 ks. By using all of the available data, we intended to improve a signal-to-noise ratio of the spectrum. Accordingly, the accumulated spectra obtained by the XIS and the EPIC show some line features around 3 keV that are attributed to the S He$β$ and Ar He$α$ lines, respectively. Since the Cygnus Loop is an evolved ($\sim$10,000 yr) supernova remnant whose temperature is relatively low ($
description: 12 pages, 9 figures, accepted for publication in PASJ
Living at the wadi – integrating geomorphology and archaeology at the oasis of Qurayyah (NW Arabia)
Creators: name: Hüneburg, Laura
name: Hoelzmann, Philipp
name: Knitter, Daniel
name: Teichert, Bernd
name: Richter, Christiane
name: Lüthgens, Christopher
name: Alsaud, Abdullah S.
name: Luciani, Marta
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: The archaeological site Qurayyah, situated in the NW of the Tabuk Province of Saudi Arabia, has been repeatedly described as one of the largest and most significant oases of Northwestern Arabia. Human occupation in the oasis started at least from the early Holocene and continued to the Nabatean, Roman and late Byzantine period. The hydrologically favored position results from its specific geomorphological location where the plateaus fade towards the east and the landscape opens towards the Tabuk Basin so that a balanced water supply was ensured. We present a geomorphological map (1:20,000; main map) based on the interpretation of a high-resolution satellite image and detailed control in the field. The map integrates archaeological, hydraulic and natural features in order to show how the people at Qurayyah structured their landscape and developed water management strategies in relation to prevailing geomorphological processes during the incipient phase (Bronze Age) of the oasis.
The Herschel Space Observatory view of dust in M81
Creators: name: Bendo, G. J.
name: Wilson, C. D.
name: Pohlen, M.
name: Sauvage, M.
name: Auld, R.
name: Baes, M.
name: Barlow, M. J.
name: Bock, J. J.
name: Boselli, A.
name: Bradford, M.
name: Buat, V.
name: Castro-Rodriguez, N.
name: Chanial, P.
name: Charlot, S.
name: Ciesla, L.
name: Clements, D. L.
name: Cooray, A.
name: Cormier, D.
name: Cortese, L.
name: Davies, J. I.
name: Dwek, E.
name: Eales, S. A.
name: Elbaz, D.
name: Galametz, M.
name: Galliano, F.
name: Gear, W. K.
name: Glenn, J.
name: Gomez, H. L.
name: Griffin, M.
name: Hony, S.
name: Isaak, K. G.
name: Levenson, L. R.
name: Lu, N.
name: Madden, S.
name: O'Halloran, B.
name: Okumura, K.
name: Oliver, S.
name: Page, M. J.
name: Panuzzo, P.
name: Papageorgiou, A.
name: Parkin, T. J.
name: Perez-Fournon, I.
name: Rangwala, N.
name: Rigby, E. E.
name: Roussel, H.
name: Rykala, A.
name: Sacchi, N.
name: Schulz, B.
name: Schirm, M. R. P.
name: Smith, M. W. L.
name: Spinoglio, L.
name: Stevens, J. A.
name: Sundar, S.
name: Symeonidis, M.
name: Trichas, M.
name: Vaccari, M.
name: Vigroux, L.
name: Wozniak, H.
name: Wright, G. S.
name: Zeilinger, W. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use Herschel Space Observatory data to place observational constraints on the peak and Rayleigh-Jeans slope of dust emission observed at 70-500 microns in the nearby spiral galaxy M81. We find that the ratios of wave bands between 160 and 500 microns are primarily dependent on radius but that the ratio of 70 to 160 micron emission shows no clear dependence on surface brightness or radius. These results along with analyses of the spectral energy distributions imply that the 160-500 micron emission traces 15-30 K dust heated by evolved stars in the bulge and disc whereas the 70 micron emission includes dust heated by the active galactic nucleus and young stars in star forming regions.
description: Accepted for A & A Herschel special issue
Patterned ground above the alpine timberline in the High Sudetes, Central Europe
Creators: name: Křížek, Marek
name: Krause, David
name: Uxa, Tomáš
name: Engel, Zbyněk
name: Treml, Václav
name: Traczyk, Andrzej
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Patterned ground in mountainous areas has a high palaeogeographic significance as it is associated with cold environments and frequently with permafrost conditions. Most patterned ground (i.e. sorted polygons, sorted nets, sorted stripes) in the High Sudetes is overgrown by vegetation and is relict. However, wind-blown summit areas with low snow cover allow for the activity of sorted circles, earth and peat hummocks, and some non-sorted stripes. The extent of patterned ground above the alpine timberline in the High Sudetes presented here is based on detailed field geomorphologic mapping. Patterned ground occurs on summit planation surfaces and surrounding gently sloping terrain, and covers 5.23 km2. Sorted polygons are the highest-elevated patterned-ground type. The spatial distribution of patterned ground is shown in the map, which could be helpful for future research of the Quaternary geomorphologic evolution of the mountain landscape and for nature protection planning in the High Sudetes.
On the Stability of Non-Supersymmetric Quantum Attractors in String Theory
Creators: name: Dominic, Pramod
name: Tripathy, Prasanta K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study four dimensional non-supersymmetric attractors in type IIA string theory in the presence of sub-leading corrections to the prepotential. For a given Calabi-Yau manifold, the D0-D4 system admits an attractor point in the moduli space which is uniquely specified by the black hole charges. The perturbative corrections to the prepotential do not change the number of massless directions in the black hole effective potential. We further study non-supersymmetric D0-D6 black holes in the presence of sub-leading corrections. In this case the space of attractor points define a hypersurface in the moduli space.
description: References Added, Typos Corrected, Appendix A.2 Reordered
Risk of violence among healthcare staff and return-to-work outcomes
Creators: name: Choi, Kelvin
Publisher: name: University of British Columbia
Year: 2018

description: Healthcare workers are at-risk for a time-loss injury due to violence and organizational factors such as staffing ratios. There is little understanding how workers return-to-work (RTW) after violence-related injury and how staffing ratios can improve RTW outcomes. The first objective of this thesis explores RTW outcomes of healthcare workers with violence-related injuries (WVI) compared to healthcare workers with nonviolence-related injuries (WNVI). The study then seeks to examine differences in the likelihood of violence and RTW by staffing ratio, and if violence modifies the relationship between staffing ratios and RTW. The first retrospective cohort study used British Columbia (BC) workers’ compensation data from 2009 to 2014. After matching on age, gender, injury type, care setting, and occupation, 5,762 healthcare workers with at least one day off-work were included. Cox regression and piecewise models were stratified for injury types and adjusted for age, sex, wage, occupation, injury types, history of violence, care setting, and shift type. The second retrospective cohort study used BC workers’ compensation data and long-term care (LTC) staffing data in 2014. The cohort included 1,590 injured LTC workers with at least one day off-work. Negative binomial regression models were adjusted for health region, bed count, and public versus private funding. Cox regression models stratified by WVIs and WNVIs were adjusted for health region, bed count, public versus private funding, sex, age, wage, injury types and occupations. In the first study, RTW was more likely within one month, less likely from two to six months, and just as likely after six months post-injury for WVIs compared to WNVIs. WVIs with mental health injuries were less likely to RTW anytime one-year post-injury compared to WNVIs with mental health injuries. In the second study, higher staffing ratios was associated with lower risk of violence-related injuries compared to lower staffing ratios. For both WVIs and WNVIs, RTW was more likely at higher staffing ratios. However, WVIs had a higher likelihood of RTW compared to WNVIs at high staffing ratios. Findings suggest targeting interventions toward WVIs with mental health injuries and increasing staffing ratio to reduce the risk of violence and improve RTW outcomes.
Geomorphology of the continental shelf of Tavolara Island (Marine Protected Area ‘Tavolara-Punta Coda Cavallo’ – Sardinia NE)
Creators: name: Deiana, Giacomo
name: Holon, Florian
name: Meleddu, Antonietta
name: Navone, Augusto
name: Orrù, Paolo E.
name: Paliaga, Enrico M.
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: In this document a geological – geomorphological map in scale 1: 25,000 is presented. The study area is located inside the Protected Marine Area Tavolara – Punta Coda Cavallo, in north-eastern Sardinia. The study was done through integrated analysis of multibeam bathymetric and very high-resolution side scan sonar data, acquired in an area of 163 km2 with the purpose of mapping the main biocoenoses and with particular reference to the coralligenous bioconstructions and the distribution of Posidonia oceanica. The interpretative hypotheses, based on the analysis of geophysical data, have been validated through diving surveys. This map represents a fundamental knowledge base and it constitutes an important technical-scientific support for long-term planning and management of the studied seabed.
A Hybrid (Monte-Carlo/Deterministic) Approach for Multi-Dimensional Radiation Transport
Creators: name: Bal, Guillaume
name: Davis, Anthony
name: Langmore, Ian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: 65C40 (primary) 86A10 (secondary)

description: A novel hybrid Monte Carlo transport scheme is demonstrated in a scene with solar illumination, scattering and absorbing 2D atmosphere, a textured reflecting mountain, and a small detector located in the sky (mounted on a satellite or a airplane). It uses a deterministic approximation of an adjoint transport solution to reduce variance, computed quickly by ignoring atmospheric interactions. This allows significant variance and computational cost reductions when the atmospheric scattering and absorption coefficient are small. When combined with an atmospheric photon-redirection scheme, significant variance reduction (equivalently acceleration) is achieved in the presence of atmospheric interactions.
Chemical Raman Enhancement of Organic Adsorbates on Metal Surfaces
Creators: name: Zayak, A. T.
name: Hu, Y. S.
name: Choo, H.
name: Bokor, J.
name: Cabrini, S.
name: Schuck, P. J.
name: Neaton, J. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a combination of first-principles theory and experiments, we provide a quantitative explanation for chemical contributions to surface-enhanced Raman spectroscopy for a well-studied organic molecule, benzene thiol, chemisorbed on planar Au(111) surfaces. With density functional theory calculations of the static Raman tensor, we demonstrate and quantify a strong mode-dependent modification of benzene thiol Raman spectra by Au substrates. Raman active modes with the largest enhancements result from stronger contributions from Au to their electron-vibron coupling, as quantified through a deformation potential, a well-defined property of each vibrational mode. A straightforward and general analysis is introduced that allows extraction of chemical enhancement from experiments for specific vibrational modes; measured values are in excellent agreement with our calculations.
description: 5 pages, 4 figures and Supplementary material included as ancillary file
Statistical and dynamical decoupling of the IGM from Dark Matter
Creators: name: Fang, Li-Zhi
name: Zhu, Weishan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The mean mass densities of cosmic dark matter is larger than that of baryonic matter by a factor of about 5 in the $Λ$CDM universe. Therefore, the gravity on large scales should be dominant by the distribution of dark matter in the universe. However, a series of observations incontrovertibly show that the velocity and density fields of baryonic matter are decoupling from underlying dark matter field. This paper shows our attemps to unveil the physics behind this puzzle. In linear approximation, the dynamics of the baryon fluid is completely governed by the gravity of the dark matter. Consequently, the mass density field of baryon matter $ρ_b({\bf r},t)$ will be proportional to that of dark matter $ρ_{\rm dm}({\bf r},t)$, even though they are different from each other initially. In weak and moderate nonlinear regime, the dynamics of the baryon fluid can be sketched by Burgers equation. A basic feature of the Burgers dynamics is to yield shocks. When the Reynolds number is large, the Burgers fluid will be in the state of Burgers turbulence, which consists of shocks and complex structures. On the other hand, the collisionless dark matter may not show such shock, but a multivalued velocity field. Therefore, the weak and moderate nonlinear evolution leads to the IGM-dark matter deviation. Yet, the velocity field of Burgers fluid is still irrotational, as gravity is curl-free. In fully nonlinear regime, the vorticity of velocity field developed, and the cosmic baryonic fluid will no longer be potential, as the dynamics of vorticity is independent of gravity and can be self maintained by the nonlinearity of hydrodynamics. In this case, the cosmic baryon fluid is in the state of fully developed turbulence, which is statistically and dynamically decoupling from dark matter. This scenario provides a mechanism of cohenent explanation of observations.
description: 21 pages
Model-based estimation and real-time data analysis for well monitoring and early gas kick detection
Creators: name: Ojinnaka, Marcellinus Azuka
name: 0000-0002-1100-6913
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Model-based estimation
Gas kick
Lost circulation
Well balooning
Lumped-parameter model

description: Gas kicks and lost circulation during oil and gas drilling must be detected on time in order for well control remedies to be effective. The emergence of deepwater drilling also increases the risk of kicks and lost circulation due to narrower drilling margins than land or shallow wells. Hence, the safety of drilling operations and mitigation of the risk of blowouts hinge on the ability of the drilling crew to detect these undesirable events in their early stages in order to quickly bring the well under control. Kick detection methods in use are largely based on monitoring well data from sensors, or alternately, predicting kick variables using numerical models with input data from the well and then corroborating predictions with well sensor data. Where discrepancies occur, they are interpreted as indications of ongoing kick. But all sensors have inherent inaccuracies and no mathematical model is perfect. Also, kick indicators used are from topside sensors that have a lag time between kick occurrence downhole and sensor reading at the wellhead. Depending on the influx rate and the type of well being drilled, well control could prove unsafe by the time the kick is detected. The goal of the proposed research is to apply model-based estimation methods to kick and lost circulation detection during conventional drilling. Kick indicators are computed based on knowledge of the system evolution, process inputs, and process outputs. Early kick detection gives the well crew ample time to initiate well control procedures to bring the well under control and avoid blowouts or other complications. It also serves to minimize non-productive time and reduce the overall cost of drilling. The estimator accounts for uncertainties both in the system model and in well sensor data. Application of model-based estimation techniques to kick detection come with constraints imposed on the structure of the mathematical model by the limited number of measurements along the flow line in most drilling operations. This, along with high computational cost of numerical models call for low to medium order deterministic models that still capture the dominant effects of fluid flow during drilling. Thus, a single phase lumped parameter model for conventional drilling is developed using bond graphs. The model is then paired with several estimators to determine minimum variance estimates or best estimates of well state that serve as indicators for kicks when they occur, including a best estimate for kick volume. The estimators run in real time and is compatible with use as an online well monitoring tool in ongoing drilling operations.
Abundance patterns of multiple populations in Globular Clusters: a chemical evolution model based on yields from AGB ejecta
Creators: name: D'Ercole, Annibale
name: D'Antona, Francesca
name: Ventura, Paolo
name: Vesperini, Enrico
name: McMillan, Stephen L. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A large number of spectroscopic studies have provided evidence of the presence of multiple populations in globular clusters by revealing patterns in the stellar chemical abundances. This paper is aimed at studying the origin of these abundance patterns. We explore a model in which second generation (SG) stars form out of a mix of pristine gas and ejecta of the first generation of asymptotic giant branch stars. We first study the constraints imposed by the spectroscopic data of SG stars in globular clusters on the chemical properties of the asymptotic and super asymptotic giant branch ejecta. With a simple one-zone chemical model, we then explore the formation of the SG population abundance patterns focussing our attention on the Na-O, Al-Mg anticorrelations and on the helium distribution function. We carry out a survey of models and explore the dependence of the final SG chemical properties on the key parameters affecting the gas dynamics and the SG formation process. Finally, we use our chemical evolution framework to build specific models for NGC 2808 and M4, two Galactic globular clusters which show different patterns in the Na-O and Mg-Al anticorrelation and have different helium distributions. We find that the amount of pristine gas involved in the formation of SG stars is a key parameter to fit the observed O-Na and Mg-Al patterns. The helium distribution function for these models is in general good agreement with the observed one. Our models, by shedding light on the role of different parameters and their interplay in determining the final SG chemical properties, illustrate the basic ingredients, constraints and problems encountered in this self-enrichment scenario which must be addressed by more sophisticated chemical and hydrodynamic simulations.
description: 19 pages, 10 figures, MNRAS accepted
Geology of the Alpha Regio (V-32) Quadrangle, Venus
Creators: name: Bethell, Erin M.
name: Ernst, Richard E.
name: Samson, Claire
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology
subject: Cardiology

description: We present a 1:2,500,000 geological map of the Alpha Regio (V-32) quadrangle, Venus. The V-32 quadrangle extends from 0° to 25 S, 0°to 30° E with an area of approximately 7,600,000 km2. Geological mapping was conducted using full resolution (maximum 75 m/pixel) SAR, altimetry and stereo-derived topography data from NASA's Magellan mission in ArcGIS 10.5. Nearly 40,000 lineaments were mapped. The oldest unit, tessera terrain, is present in two major regions: Alpha Regio and Minu-Anni Tessera. Two major fracture belts, both oriented approximately NNW-SSE, and four minor fracture belts have been identified and characterized. Two previously unrecognized wrinkle ridge trends of radiating and circumferential orientation have also been identified in the northeastern corner of the quadrangle. A total of 77 geological units were mapped. Plains material, previously mapped as global regional plains units, was divided into 27 units. Earlier estimates of the diameters of several coronae have been extended by hundreds of kilometres.
Extinguishing stigma : an examination of firefighter stress, social supports, and attitudes towards psychological help for behavioural health
Creators: name: Isaac, Gemma
Publisher: name: University of British Columbia
Year: 2018

description: Firefighters are exposed to high stress environments, often witnessing multiple traumatic events throughout their careers. Due to a number of recent suicides, unknown deaths, and line of duty deaths in the fire service, a call to examining firefighters’ psychological support and accessibility has become a priority in occupational health and safety. The primary objectives of this study were to investigate firefighter occupational stress, peer supports, and attitudes towards psychological help for behavioural health. Findings from the data collected from 254 firefighters from a large fire department in the Lower Mainland of British Columbia show that disruption of sleep, isolation from family due to work demands and stress, and upsetting thoughts about past runs were the top occupational stressors for firefighters. However, data suggest that these occupational stressors were mitigated by the levels of peer support received; that is, those who reported higher levels of peer support also reported lower levels of occupational stress. Survey data revealed firefighters are in support of seeing professional psychological help for behavioural health. Qualitative data provided insight on what firefighters deemed as helpful or challenging variables when connecting with support, while also providing suggestions for effective mental health supports. Implications of and recommendations from these findings are discussed.
Conductance of a molecular junction mediated by unconventional metal-induced gap states
Creators: name: Gutiérrez, Rafael
name: Fagas, Giorgos
name: Richter, Klaus
name: Grossmann, Frank
name: Schmidt, Rüdiger
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik
subject: 73.63.-b
subject: 85.65.+h
subject: 73.22.-f

description: The conductance of a molecular junction is commonly determined by either charge-transfer doping, where alignment of the Fermi energy to the molecular levels is achieved, or tunnelling through the tails of molecular resonances within the highest-occupied and lowest-unoccupied molecular-orbital gap. Here, we present an alternative mechanism where electron transport is dominated by electrode surface states. They give rise to metallization of the molecular bridge and additional, pronounced conductance resonances allowing for substantial tailoring of its electronic properties via, e.g., a gate voltage. This is demonstrated in a field-effect geometry of a fullerene bridge between two metallic carbon nanotubes.
The irrationality of some number theoretical series
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J72

description: We prove the irrationality of some factorial series. To do so we combine methods from elementary and analytic number theory with methods from the theory of uniform distribution.
The Angular Momenta of Neutron Stars and Black Holes as a Window on Supernovae
Creators: name: Miller, J. M.
name: Miller, M. C.
name: Reynolds, C. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is now clear that a subset of supernovae display evidence for jets and are observed as gamma-ray bursts. The angular momentum distribution of massive stellar endpoints provides a rare means of constraining the nature of the central engine in core-collapse explosions. Unlike supermassive black holes, the spin of stellar-mass black holes in X-ray binary systems is little affected by accretion, and accurately reflects the spin set at birth. A modest number of stellar-mass black hole angular momenta have now been measured using two independent X-ray spectroscopic techniques. In contrast, rotation-powered pulsars spin-down over time, via magnetic braking, but a modest number of natal spin periods have now been estimated. For both canonical and extreme neutron star parameters, statistical tests strongly suggest that the angular momentum distributions of black holes and neutron stars are markedly different. Within the context of prevalent models for core-collapse supernovae, the angular momentum distributions are consistent with black holes typically being produced in GRB-like supernovae with jets, and with neutron stars typically being produced in supernovae with too little angular momentum to produce jets via magnetohydrodynamic processes. It is possible that neutron stars are imbued with high spin initially, and rapidly spun-down shortly after the supernova event, but the available mechanisms may be inconsistent with some observed pulsar properties.
description: ApJ Letters, accepted
Recent Results of Fluctuation and Correlation Studies from the STAR Experiment
Creators: name: Tarnowsky, Terence J
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Enhanced fluctuations and correlations have been observed in the phase transitions of many systems. Their appearance at the predicted QCD phase transition (especially near the expected critical point) may provide insight into the nature of the phase transition. Recent results from the STAR experiment will be presented with a focus on particle ratio (K/$π$ and p/$π$) fluctuations, forward-backward multiplicity correlations, and balance functions. Also discussed will be possibilities for measuring these correlations and fluctuations in the recently initiated beam energy scan at RHIC.
description: 6 pages, 3 figures. To be published in the proceedings of WWND 2010, Ocho Rios, Jamaica, January 20010, Journal of Physics: Conference Series.
The Orbifold-String Theories of Permutation-Type: I. One Twisted BRST per Cycle per Sector
Creators: name: Halpern, M. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We resume our discussion of the new orbifold-string theories of permutation-type, focusing in the present series on the algebraic formulation of the general bosonic prototype and especially the target space-times of the theories. In this first paper of the series, we construct one twisted BRST system for each cycle $j$ in each twisted sector $σ$ of the general case, verifying in particular the previously-conjectured algebra $[Q_{i}(σ),Q_{j}(σ)]_{+} =0$ of the BRST charges. The BRST systems then imply a set of extended physical-state conditions for the matter of each cycle at cycle central charge $\hat{c}_{j}(σ)=26f_{j}(σ)$ where $f_{j}(σ)$ is the length of cycle $j$.
description: 31 pages
The irrationality of a number theoretical series
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J72

description: Denote by $σ_k(n)$ the sum of the $k$-th powers of the divisors of $n$, and let $S_k=\sum_{n\geq 1}\frac{σ_k(n)}{n!}$. We prove that Schinzel's conjecture H implies that $S_k$ is irrational, and give an unconditional proof for the case $k=3$.
Media Content Atlas: A Pipeline to Explore and Investigate Multidimensional Media Space using Multimodal LLMs
Creators: name: Cerit, Merve
name: Zelikman, Eric
name: Cho, Mu-Jung
name: Robinson, Thomas N.
name: Reeves, Byron
name: Ram, Nilam
name: Haber, Nick
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: H.5.0; H.5.1; I.2; J.4

description: As digital media use continues to evolve and influence various aspects of life, developing flexible and scalable tools to study complex media experiences is essential. This study introduces the Media Content Atlas (MCA), a novel pipeline designed to help researchers investigate large-scale screen data beyond traditional screen-use metrics. Leveraging multimodal large language models (MLLMs), MCA enables moment-by-moment content analysis, content-based clustering, topic modeling, image retrieval, and interactive visualizations. Evaluated on 1.12 million smartphone screenshots continuously captured during screen use from 112 adults over an entire month, MCA facilitates open-ended exploration and hypothesis generation as well as hypothesis-driven investigations at an unprecedented scale. Expert evaluators underscored its usability and potential for research and intervention design, with clustering results rated 96% relevant and descriptions 83% accurate. By bridging methodological possibilities with domain-specific needs, MCA accelerates both inductive and deductive inquiry, presenting new opportunities for media and HCI research.
description: Accepted to CHI 2025, in press. See the project page at mediacontentatlas.github.io
Japanese rule over rural Manchukuo : strategies and policies
Creators: name: Tian, Mo
Publisher: name: The Australian National University
Year: 2015
Subjects: political history
China
Japan
China-Japan relations
social control
rural control
Japanese imperialism
Manchuria
Manchukuo
Northeast China
Japanese colonialism

description: The Japanese Kwantung Army created Manchukuo as a client state in northeast China in March 1932. The new entity followed policies that coincided closely with Japanese political and economic interests. In the enterprise of constructing Manchukuo, the Japanese authorities employed a set of strategies and policies to restructure the relationship between state and society. The strategies and policies established the Japanese power in the political domains of Manchukuo and facilitated drastic change in its socioeconomic structures. However, Manchukuo eventually dissolved after the Japanese surrender at the end of the Pacific War in August 1945. Drawing from primary sources in Chinese, Japanese and Korean published in the 1930s and 1940s, this thesis presents a history of the central characteristics of Japanese rule over rural Manchukuo during 1932 and 1945. This thesis analyses the elements of Japanese rule that were expressed in the policies and practices implemented in Manchukuo. In doing so, the thesis illuminates the nature, strength and weakness of Japanese imperialism. This approach generates insights into the mechanisms and limitations of Japanese rule, and it contributes to the theoretical construction of Japanese imperialism. Japanese rule over rural Manchukuo involved a high degree of political intervention in the military, economic and social spheres as well as the reorganisation of state structures. The Japanese authorities stablished public order through the elimination of social resistance and the construction of rural settlements; the reorganisation of the rural administration through the baojia and self-government initiatives; the establishment of rural financial order by organising cooperatives; the control of the procurement and distribution of agrarian output through coercion; and the management of labour through state mobilisation. This thesis argues that the Japanese strategies and policies of control represented a process of reshaping state structures. The Japanese authorities demonstrated great skill in exercising control over the agriculture, government administration, and finance and labour relations in Manchukuo. The Japanese rule over rural Manchukuo revealed both effectiveness and limitations. The effectiveness was manifested in the establishment of social order and institutions to serve the needs of control. The limitations lay in the degree of compliance that the Japanese ensured in the local populace and in the extent to which the Japanese power penetrated into the production relations of the rural society.
Deciphering the minimum of energy of some walking technicolor models
Creators: name: Doff, A.
name: Natale, A. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There are quasi-conformal theories, like the Minimal and Ultraminimal Technicolor models, which may break dynamically the gauge symmetry of the Standard Model and at the same time are compatible with electroweak precision data. The main characteristic of this type of models is their fermionic content in one or more higher dimensional representations, therefore it is not immediate to know which model leads to the most attractive channel or the minimum vacuum energy state. We discuss the effective potential for composite operators for these models, verifying that their vacuum energy values are different, with the Ultraminimal model having a deeper minimum of energy.
description: 4 pages, 2 figures, published version.
Conditions for adiabatic spin transport in disordered systems
Creators: name: Popp, Markus
name: Frustaglia, Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik
subject: 73.23.-b
subject: 72.10.-d,
subject: 72.25.-b
subject: 03.65.Vf

description: We address the controversy concerning the necessary conditions for the observation of Berry phases in disordered mesoscopic conductors. For this purpose, we calculate the spin-dependent conductance of disordered two-dimensional structures in the presence of inhomogeneous magnetic fields. Our numerical results show that for both, the overall conductance and quantum corrections, the relevant parameter defining adiabatic spin transport scales with the square root of the number of scattering events, in generalization of Stern’s original proposal [A. Stern, Phys. Rev. Lett. 68, 1022 (1992)]. This could hinder a clear-cut experimental observation of Berry phase effects in diffusive metallic rings.
Sifted character sums and free quotients of Bianchi groups
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20G30

description: We show that the Bianchi group $\mathrm{PSL}_2(\mathcal{O}_d)$, where $\mathcal{O}_d$ is the ring of integers in $\Q(\sqrt{d})$, $d<0$, has a free quotient of rank $\geq |d|^{1/4-ε}$, as $|d|\to\infty$.
Matter-wave 2D solitons in crossed linear and nonlinear optical lattices
Creators: name: da Luz, H. L. F.
name: Abdullaev, F. Kh.
name: Gammal, A.
name: Salerno, M.
name: Tomio, Lauro
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is demonstrated the existence of multidimensional matter-wave solitons in a crossed optical lattice (OL) with linear OL in the $x-$direction and nonlinear OL (NOL) in the $y-$direction, where the NOL can be generated by a periodic spatial modulation of the scattering length using an optically induced Feshbach resonance. In particular, we show that such crossed linear and nonlinear OL allows to stabilize two-dimensional (2D) solitons against decay or collapse for both attractive and repulsive interactions. The solutions for the soliton stability are investigated analytically, by using a multi-Gaussian variational approach (VA), with the Vakhitov-Kolokolov (VK) necessary criterion for stability; and numerically, by using the relaxation method and direct numerical time integrations of the Gross-Pitaevskii equation (GPE). Very good agreement of the results corresponding to both treatments is observed.
description: 8 pages (two-column format), with 16 eps-files of 4 figures