cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Complete loop quantization of a dimension 1+2 Lorentzian gravity theory
Creators: name: Barbosa, Rodrigo M S
name: Constantinidis, Clisthenis P
name: Oporto, Zui
name: Piguet, Olivier
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: De Sitter Chern-Simons gravity in D = 1 + 2 spacetime is known to possess an extension with a Barbero-Immirzi like parameter. We find a partial gauge fixing which leaves a compact residual gauge group, namely SU(2). The compacticity of the residual gauge group opens the way to the usual LQG quantization techniques. We recall the exemple of the LQG quantization of SU(2) CS theory with cylindrical space topology, which thus provides a complete LQG of a Lorentzian gravity model in 3-dimensional space-time.
description: Loops11 - Madrid - 2011 (4 pages, Latex)
A Temperature-based Methane Oxidation Performance Model For Field High-rate Methane Biofilters
Creators: name: Gunasekera, Samadhi
Publisher: name: Schulich School of Engineering
Year: 2019
Subjects: subject: methane
subject: methanotrophy
subject: methane biofilter
subject: high rate methane biofilter
subject: Engineering
subject: Engineering--Civil
subject: Engineering--Environmental

description: High rate methane biofiltration (HMBF) technology is a promising bioprocess to attenuate methane (CH4) rich waste gas from oil well and battery sites as an alternative to flaring and venting. Typically, the field performance of an HMBF is evaluated through its CH4 removal capacity, which is calculated by manually measuring the CH4 input and output. This approach is accurate for an instance of gas emissions. However, to determine HMBF performance over extended periods of time, continuous measurement techniques are required. This research uses temperature as a proxy to determine the CH4 oxidation in remote, field HMBFs. A physically based model was developed to back calculate CH4 oxidation rate based on the temperature change inside the filter bed. The model performance was calibrated and validated through actual data obtained from an actively aerated field HMBF, which was designed, constructed and operated for 420 days in an oil battery site in Hanna, AB. An empirical model was also developed using the data collected. The HMBF was highly successful in treating solution gas with a recorded maximum CH4 oxidation of 1657 g/m3.day. The temperature-based model showed high agreement with the actual results obtained from the HMBF yielding an R2 value of 0.77 and can be used to measure daily and cumulative GHG emission reductions achieved through an HMBF during any stage of operation. The empirical model developed also had a good fit with the temperature-based model and could be used to design and size future HMBFs and determine the best inlet flow conditions in which to operate an HMBF. The effect of inlet loading rate, air to CH4 ratio, temperature, moisture content and air-filled porosity on HMBF performance and the changes to filter bed conditions due to CH4 oxidation were studied. It was found that while inlet loading rate drives the CH4 oxidation rate, other parameters play an important role to sustain high CH4 oxidation over long periods of time.
Amplitude spectroscopy of two coupled qubits
Creators: name: Satanin, A. M.
name: Denisenko, M. V.
name: Ashhab, Sahel
name: Nori, Franco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of a time-dependent driving field with a large amplitude on a system composed of two coupled qubits (two-level systems). Using the rotating wave approximation (RWA) makes it possible to find simple conditions for resonant excitation of the four-level system. We find that the resonance conditions include the coupling strength between the qubits. Numerical simulations confirm the qualitative conclusions following from the RWA. To reveal the peculiarities of resonant transitions caused by the quasi-level motion and crossing in a periodic driving field, we use Floquet states, which determine the precise intermediate states of the system. Calculating the quasi-energy states of the multi-level system makes it possible to find the transition probabilities and build interference patterns for the transition probabilities. The interference patterns demonstrate the possibility of obtaining various pieces of information about the qubits, since the positions of transition-probability maxima depend on various system parameters, including the coupling strength between the qubits.
description: 9 pages, 6 figures
title: Imaging approach in the evaluation of primary retroperitoneal masses
Creators: name: Pai, Vivek
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Abdominal Viscera
subject: Anatomy
subject: Oncology
subject: Retroperitoneum
subject: CT
subject: MR
subject: Education
subject: Cancer
subject: Education and training
subject: Not applicable
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To discuss the anatomy of the retroperitoneal space. To highlight clues which help identify the retroperitoneal location masses. To discuss the various features of retroperitoneal masses that help narrow down a...
VI Международная научно-практическая конференция «Актуальные аспекты развития науки и общества в эпоху цифровой трансформации»
Creators: name: ООО "Институт развития образования и консалтинга"
Publisher: name: ООО "Институт развития образования и консалтинга"
Year: 2023

description: VI Международная научно-практическая конференция «Актуальные аспекты развития науки и общества в эпоху цифровой трансформации»
Calculation of complex DNA damage induced by ions
Creators: name: Surdutovich, Eugene
name: Gallagher, David C.
name: Solov'yov, Andrey V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Medical Physics (physics.med-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: This paper is devoted to the analysis of the complex damage of DNA irradiated by ions. The analysis and assessment of complex damage is important because cells in which it occurs are less likely to survive because the DNA repair mechanisms may not be sufficiently effective. We studied the flux of secondary electrons through the surface of nucleosomes and calculated the radial dose and the distribution of clustered damage around the ion's track. The calculated radial dose distribution is compared to simulations. The radial distribution of the complex damage is found to be different from that of the dose. Comparison with experiments may solve the question of what is more lethal for the cell, damage complexity or absorbed energy. We suggest a way to calculate the probability of cell death based on the complexity of the damage. This work is done within the framework of the phenomenon-based multiscale approach to radiation damage by ions.
description: 8 pages, 7 figures
Coherent states for continuous spectrum operators with non-normalizable fiducial states
Creators: name: Geloun, Joseph Ben
name: Hnybida, Jeff
name: Klauder, John R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The problem of building coherent states from non-normalizable fiducial states is considered. We propose a way of constructing such coherent states by regularizing the divergence of the fiducial state norm. Then, we successfully apply the formalism to particular cases involving systems with a continuous spectrum: coherent states for the free particle and for the inverted oscillator $(p^2 - x^2)$ are explicitly provided. Similar ideas can be used for other systems having non-normalizable fiducial states.
description: 17 pages, typos corrected, references added
Detection of spin polarization utilizing singlet and triplet states in a single-lead quantum dot
Creators: name: Otsuka, Tomohiro
name: Sugihara, Yuuki
name: Yoneda, Jun
name: Katsumoto, Shingo
name: Tarucha, Seigo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose and demonstrate a new method to probe local spin polarization in semiconductor micro devices at low and zero magnetic fields. By connecting a single-lead quantum dot to a semiconductor micro device and monitoring electron tunneling into singlet and triplet states in the dot, we can detect the local spin polarization formed in the target device. We confirm the validity of this detection scheme utilizing spin split quantum Hall edge states. We also observe non-zero local spin polarization at the device edge in low magnetic fields, which is not detectable with conventional macroscopic probes.
description: 4 pages, 3 figures
On the efficiency of the Blandford-Znajek mechanism for low angular momentum relativistic accretion
Creators: name: Das, Tapas K.
name: Czerny, Bozena
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Blandford-Znajek (BZ) mechanism has usually been studied in the literature for accretion with considerably high angular momentum leading either to the formation of a cold Keplerian disc, or a hot and geometrically thick sub-Keplerian flow as described within the framework of ADAF/RIAF. However, in nearby elliptical galaxies, as well as for our own Galactic centre, accretion with very low angular momentum is prevalent. Such quasi-spherical strongly sub-Keplerian accretion has complex dynamical features and can accommodate stationary shocks. In this letter, we present our calculation for the maximum efficiency obtainable through the BZ mechanism for complete general relativistic weakly rotating axisymmetric flow in the Kerr metric. Both shocked and shock free flow has been studied in detail for rotating and counter rotating accretion. Such study has never been done in the literature before. We find that the energy extraction efficiency is low, about 0.1%, and increases by a factor 15 if the ram pressure is included. Such an efficiency is still much higher than the radiative efficiency of such optically thin flows. For BZ mechanism, shocked flow produces higher efficiency than the shock free solutions and retrograde flow provides a slightly larger value of the efficiency than that for the prograde flow.
description: Substantially revised final version to appear in MNRAS Letters. Three colour figures
Scaling urban energy use and greenhouse gas emissions through LiDAR
Creators: name: Van Der Laan, Michael Tije
Publisher: name: University of British Columbia
Year: 2012

description: Although models to quantify CO₂e emissions in urban areas exist, they are within isolated disciplines, and are targeted at specific scales, emissions processes, and end-users — not a priori compatible with planning needs. Furthermore, the majority of existing models rely on inventory data, which is typically only available at aggregate space and time scales. It is necessary however, that neighborhood-scale CO₂e emissions estimates are provided to determine the key relationships between urban form and emissions — which can than be applied to future planning strategies. This thesis developed a new methodology to integrate LiDAR data, building simulation software and a building typology database to rapidly model energy and emissions for a large number of buildings. To adjust building energy demand to local urban-context, building morphology, and population density a scaling approach is proposed. This methodology was applied to a study area of 7.4 km² in Vancouver, BC, consisting of 7812 buildings ranging in moderate to high density. Modeled building energy use in this transect was sensitive to local conditions (average variation in building energy use due to urban-context 2.8%, building morphology 2.8%, and population density 3.2%) resulting CO₂e emissions of 14.2 kg CO₂e m⁻²yr⁻¹ (1309 kg CO₂e Inh.⁻¹ yr⁻¹) varying dramatically between the central business district (40.1), mixed-use (12.7), and residential (9.0) neighbourhoods. Spatial and temporal patterns of building energy use, CO₂e emissions and anthropogenic heat release by buildings are presented and discussed in relation to urban form.
Geometric stochastic resonance in a double cavity
Creators: name: Ghosh, Pulak K.
name: Glavey, Russell
name: Marchesoni, Fabio
name: Savel'ev, Sergey E.
name: Nori, Franco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Geometric stochastic resonance of particles diffusing across a porous membrane subject to oscillating forces is characterized as a synchronization process. Noninteracting particle currents through a symmetric membrane pore are driven either perpendicular or parallel to the membrane, whereas harmonic-mixing spectral current components are generated by the combined action of perpendicular and parallel drives. In view of potential applications to the transport of colloids and biological molecules through narrow pores, we also consider the role of particle repulsion as a controlling factor.
title: A Twist in the ‘Tail’ – Lesions found on the last axial slice in brain imaging
Creators: name: Pai, Vivek
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Neuro
subject: Anatomy
subject: CNS
subject: Head and neck
subject: CT
subject: MR
subject: Education
subject: Education and training
subject: Not applicable
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: 1. To enumerate review areas at the level of the craniovertebral junction. 2. To review pathologies at this level which may be missed during routine reporting of brain...
The large-scale energetic ion layer in the high latitude Jovian magnetosphere as revealed by Ulysses/HI-SCALE cross-field intensity-gradient measurements
Creators: name: Anagnostopoulos, G. C.
name: Karanikola, I.
name: Marhavilas, P. K.
name: Sarris, E. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Ulysses investigated the high latitude Jovian magnetosphere for a second time after Pioneer 11 mission and gave us the opportunity to search the structure and the dynamics of this giant magnetosphere above the magnetodisc. Kivelson(1976) and Kennel & Coroniti(1979) reported that Pioneer 11 observed energetic particle intensities at high latitudes at the same level with those measured in the plasma sheet and inferred that they were not consistent with the magnetodisc model. Ulysses observations supported the idea about a large-scale layer of energetic ions and electrons in the outer high latitude Jovian magnetosphere (Cowley et al.1996; Anagnostopoulos et al. 2001). This study perform a number of further tests for the existence of the large scale layer of energetic ions in the outer high latitude Jovian magnetosphere by studying appropriate cross-B field anisotropies in order to monitor the ion northward/southward intensity gradients. In particular, we examined Ulysses/HI-SCALE observations of energetic ions with large gyro-radius (0.5-1.6MeV protons and >2.5MeV heavy(Z>5) ions) in order to compare instant intensity changes with remote sensing intensity gradients. Our analysis confirms the existence of an energetic particle layer in the north hemisphere, during the inbound trajectory of Ulysses traveling at moderate latitudes, and in the south high-latitude duskside magnetosphere, during the outbound segment of the spacecraft trajectory. Our Ulysses/HI-SCALE data analysis also provides evidence for the detection of an energetic proton magnetopause boundary layer during the outbound trajectory of the spacecraft. During Ulysses flyby of Jupiter the almost permanent appearance of alternative northward and southward intensity gradients suggests that the high latitude layer appeared to be a third major area of energetic particles, which coexisted with the radiation belts and the magnetodisc.
description: 37 pages, 11 figures, 1 table
title: MR imaging findings of multiple biliary hamartomatosis (Von Meyenburg Complex)
Creators: name: Boraschi, Piero
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Liver
subject: Biliary Tract / Gallbladder
subject: Abdomen
subject: Abdominal Viscera
subject: MR
subject: MR-Cholangiography
subject: Cholangiography
subject: Diagnostic procedure
subject: Congenital
subject: Cysts
subject: Developmental disease
subject: Not applicable
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To depict the most typical MRI features of multiple biliary hamartomas (von Meyenburg complexes), providing support for diagnosis and helpful to differentiate them from other hepatobiliary cystic...
Implications of a New Light Scalar Near the Bottomonium Regime
Creators: name: Baumgart, Matthew
name: Katz, Andrey
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the decay modes of a new, light spin-0 particle, arguing that if the mass of the (pseudo)scalar is ~11-15 GeV, it can have an appreciable branching ratio into bottomonium, in particular the rare eta's. Using non-relativistic QCD (NRQCD), we calculate its decay rate to bottomonia for mass splittings greater than the typical momentum transfer within the bound state. It can exceed that of decays to other Standard Model fermions under the assumption of couplings proportional to those of the Standard Model. At smaller splittings, where our computational methods break down, we estimate the rate into bottomonia using data-driven methods. When the spin-0 state decays to bottomonia whose mass is too light to produce B-meson pairs, we get a qualitatively new experimental signature, decays to b-quarks invisible to b-tagging. Such a light, spinless particle can arise in extended Higgs sectors, making this channel potentially observable in decay chains initiated by the subdominant decay of a Standard Model-like Higgs to a pair of them.
description: 30 pages, 6 figures. V2: minor changes
On Compact Finsler Spaces of Positive Constant Curvature
Creators: name: Bidabad, Behroz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: An $n$-dimensional ($n\geq 2$) simply connected, compact without boundary Finsler space of positive constant sectional curvature is conformally homeomorphic to an n-sphere in the Euclidean space $\R^{n+1}$.
Muon (g-2) from the bulk neutrino field in a warped extra dimensional model
Creators: name: Hundi, R. S.
name: Roy, Sourov
name: SenGupta, Soumitra
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the Randall-Sundrum model, a bulk neutrino field in the 5-dimensional space-time can give rise to tiny Dirac masses to neutrinos. In such a scenario, we have computed the contribution of the bulk neutrino field to the anomalous magnetic moment $(g-2)_μ$ of muon. We have computed this contribution in the 't Hooft-Feynman gauge and have found that the contribution has the right sign to fit the current discrepancy between the experiment and the standard model value of $(g-2)_μ$. We have also studied possible constraints on the model parameters by including contributions to $(g-2)_μ$ from other sources such as bulk gravitons.
description: 18 pages, 3 figures, 2 tables, minor changes, this version has been published in Physical Review D
title: Splenic Emergencies: value of US exploration for the diagnosis
Creators: name: Schillirò , Maria Laura
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Emergency Imaging
subject: Abdomen
subject: Spleen
subject: Ultrasound
subject: Ultrasound-Colour Doppler
subject: Ultrasound-Power Doppler
subject: Diagnostic procedure
subject: Embolism / Thrombosis
subject: Ischaemia / Infarction
subject: Trauma
subject: Not applicable
subject: Performed at one institution

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To learn the ultrasound technique to evaluate the spleen. To become familiar with the most common imaging findings of spleen abnormalities, encountered in emergency...
$ρ^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR
Creators: name: Agakishiev, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent $ρ^0$ photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent $ρ^0$ photoproduction with nuclear breakup is $10.5\pm1.5\pm 1.6$ mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is $2.8\pm0.6$, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed $15\pm 55$% increase between 130 GeV and 200 GeV.
title: Understanding drug lung injury.
Creators: name: De la mano González, SARA
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Drugs / Reactions
subject: Education
subject: CT-High Resolution
subject: Lung
subject: Chest

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The purpose of this poster is to review the most common histopathologic processes underlying drug toxicity lung injury (DILD), describe and illustrate the radiological manifestations on HRCT based on our...
title: Imaging of Musculoskeletal Trauma in the Pregnant Patient
Creators: name: Cain, Usa
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Trauma
subject: Education and training
subject: eLearning
subject: Education
subject: MR
subject: Digital radiography
subject: CT
subject: Trauma
subject: Obstetrics (Pregnancy / birth / postnatal period)
subject: Musculoskeletal bone
subject: Musculoskeletal

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Discuss the spectrum and causes of musculoskeletal injuries that affect the pregnant patient. Review imaging of musculoskeletal injury patterns that affect pregnant patients. Discuss imaging modalities and techniques employed to evaluate trauma in...
Hypermobility Spectrum Disorders (HSD) and Ehlers-Danlos Syndromes (EDS): Relevance of Patient Experience of Chronic Illness Care, Patient-Centered Care, and Complementary Alternative Medicine Use for Healthcare Professionals
Creators: name: Guedry, Sara
Publisher: name: figshare
Year: 2023
Subjects: Research, science and technology policy
Nutritional science
Traditional, complementary and integrative medicine not elsewhere classified

description: A Thesis Presented to the Faculty of the School of Research and Graduate Studies of the National University of Natural Medicine in Partial Fulfillment of the Requirements for the Degree of Master of Science in Integrative Medicine Research Sara Elizabeth Guedry September 2021
title: Signatures of demyelination
Creators: name: YOSHITA, DIVYA
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Education and training
subject: Perception image
subject: MR
subject: Anatomy
subject: Neuro

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To be able to identify demyelination on MR imaging. To describe the aetiopathogenesis of demyelination. To be able to illustrate the typical MRI findings in various demyelinating...
The contribution of prefrontal-subcortical circuitry to risk-based decision making
Creators: name: St. Onge, Jennifer Rose
Publisher: name: University of British Columbia
Year: 2012

description: The ability to make decisions about different risks and rewards appears to recruit a neural circuit that includes the prefrontal cortex (PFC), the amygdala and the ventral striatum. The present thesis used a combination of behavioural, statistical, anatomical, and pharmacological techniques to elucidate the nature of risk-based decision making and the underlying neural circuits and neuromodulatory systems that contribute to this form of behaviour. Chapter 2 examined probabilistic discounting as a model of risk-based decision making. Statistical modeling revealed substantial individual variability in discounting of large, probabilistic rewards in well-trained animals which develops over the course of training. These discounting patterns were not influenced by luckiness in receiving reward early in training. Rather, patterns of risky vs. safe choices were influenced by both 1) recent luck in forced choice outcomes early in training and 2) outcomes of free choice trials in the animal’s recent reinforcement history. Chapter 3 revealed that the prelimbic region of the rat medial PFC makes a selective contribution to probabilistic discounting by keeping track of changes in reward probability in order to update value representations, whereas the insular and dorsal anterior cingulate subregions have no influence on risky choice. While it makes no contribution to choice outcome, the OFC region aids decision latency. Chapter 4 describes a series of asymmetrical disconnections which revealed that separate neural circuits mediate different aspects of risk-based decision making. Amygdala projections to the nucleus accumbens bias behaviour towards large, risky reward options whereas top-down projections from the medial PFC to the amygdala regulate this bias and promote adjustments in choice towards smaller, but potentially more valuable, options. Chapter 5 revealed that the contribution of medial PFC activity to probabilistic discounting is further modulated by a fine balance of D1 and D2 receptor activity. The general discussion in Chapter 6 integrates these findings into a broader perspective on the neural basis of decision making about probabilistic rewards, while focusing on the PFC and its interactions with other neural systems to guide decision making.
A New Third Party in America? What It Would Take
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2010
Subjects: subject: Political science
subject: FOS: Political science

description: The emergence of a third party in the current American political environment is unlikely. Third parties, even short lived ones, do not emerge by occupying a space on a left right political spectrum, but by rallying voters around a specific issue that is not being addressed satisfactorily by either of the major parties. Today, the issue which has the potential to do this, but has been largely overlooked is the question of whether the U.S. should pursue an isolationist or interventionist foreign policy.
title: Dislocation and Materiality
Creators: name: Crenshaw, Mary
Publisher: name: The University of East London
Year: 2018

description: Dislocation, and Materiality is the culmination my three years of research into artists and theorists, whose work provided me with a clearer direction in my practice as a painter. My research has enabled me to become more aware of the reasons for my current approach to painting that includes: relying on my physical energy, the inherent properties in the material/paint, defining space, memory of place that suggests urban landscape and its
inhabitants.
The theories of Georges Bataille on the mark, François Jullien on the Chinese concept of lifeforce, and Theodor Adorno on how dissonance is central to artistic and aesthetic process have fed the development of my creative practice. The key artists I researched –Anselm Kiefer,
Julie Mehretu, Fabienne Verdier, Mark Bradford, and Phyllida Barlow – provided me with new concepts to introduce in my own work. Mehretu's paintings supplied me with the solution for incorporating political content by means of suggestive titles and expressive marking over imagery. Kiefer's rich assortment of media led me to understand how materials contribute to
the meaning of a work. Verdier's gesture and physical energy encouraged me to let go of control and embrace expressionistic paint application. How Mark Bradford uses found brochures and posters from his neighbourhood, transforming them into material for his work gave me the insight that meaning can be in the actual materials. Phyllida Barlow's dynamic
works made me consider how the different kinds of marks I create carry vitality and ideas communicated by the material properties of the paint.
Seinfeld Elections: Why Democracy Needs Conflict
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Political science
subject: FOS: Political science

description: Unity is an appealing abstract notion, but in democracies, other than a basic agreement on the rules, unity is not a very helpful dynamic. Democracies succeed not when people don’t argue and disagree, but when they argue and disagree on a range of issues. This allows for coalitions to evolve, for the winners in one fight to be the losers on another and for electoral outcomes to differ in each election.
Blaming WikiLeaks
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2010
Subjects: subject: Political science
subject: FOS: Political science
subject: Public administration

description: The WikiLeaks story has unified the political elite in the U.S. elsewhere to a startling degree. It is as almost as if a readiness to strongly criticize WikiLeaks is the not so secret password to be part of this elite. Based on the barrage of attacks on WikiLeaks and its leader Julian Assange, one would think that Assange is single-handedly responsible for the difficulties the U.S. faces all over the world.
title: Look for the eye: Traumatic orbital injuries
Creators: name: Aydın Kızılkum, Ceren
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Diagnostic or prognostic study
subject: Retrospective
subject: Trauma
subject: Medico-legal issues
subject: Education
subject: Computer Applications-3D
subject: CT
subject: Trauma
subject: Eyes
subject: Emergency
subject: Emergency Imaging

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: to underline the importance of assessment of the eye imaging in the emergency department to describe ocular anatomy to show the most common traumatic orbital...
Consensus Over Ergodic Stationary Graph Processes
Creators: name: Tahbaz-Salehi, Alireza
name: Jadbabaie, Ali
Publisher: name: Columbia University
Year: 2010

description: In this technical note, we provide a necessary and sufficient condition for convergence of consensus algorithms when the underlying graphs of the network are generated by an ergodic and stationary random process. We prove that consensus algorithms converge almost surely, if and only if, the expected graph of the network contains a directed spanning tree. Our results contain the case of independent and identically distributed graph processes as a special case. We also compute the mean and variance of the random consensus value that the algorithm converges to and provide a necessary and sufficient condition for the distribution of the consensus value to be degenerate.
Foreign Policy and Presidential Expectations
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Political science
subject: FOS: Political science
subject: International relations

description: The ability to manage expectations is an important political skill, both when seeking office, particularly the American presidency because a presidential campaign consists of numerous primaries over the course of several months before the general election in November, as well as when governing. President Obama, has done a good job of managing the enormous and unrealistic expectations around domestic issues, particularly the economy, which he encountered when he became president in January of 2009. Obama has done this by constantly reminding voters about the extremely difficult economic environment he encountered when he took office and has frequently warning that it will be a long and tough path back to good economic times.
Why Rand Paul's Victory Matters for Republican Foreign Policy
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2010
Subjects: subject: Political science
subject: FOS: Political science

description: The biggest news stories following Rand Paul's victory in the recent Republican primary for the U.S. Senate seat in Kentucky have focused on his comments regarding his view that the 1964 Civil Rights Act abridged the rights of business owners, his defense of BP regarding the recent oil spill on the grounds that "accidents happen", and that it is wrong to criticize BP or seek to hold them accountable for the spill. These comments have all but obscured some other implications of Paul's victory.  Paul's victory has also been described as a win for the Tea Party movement.  While Paul still must win a tough race in November, his primary victory certainly demonstrates that the Tea Party movement is likely to remain an important part of the Republican Party, at least for the short term.  This is not without implications for U.S. foreign policy.
Distributed Coverage Verification in Sensor Networks Without Location Information
Creators: name: Tahbaz-Salehi, Alireza
name: Jadbabaie, Ali
Publisher: name: Columbia University
Year: 2010
Subjects: Business
Economics

description: In this paper, we present three distributed algorithms for coverage verification in sensor networks with no location information. We demonstrate how, in the absence of localization devices, simplicial complexes and tools from algebraic topology can be used in providing valuable information about the properties of the cover. Our approach is based on computation of homologies of the Rips complex corresponding to the sensor network. First, we present a decentralized scheme based on Laplacian flows to compute a generator of the first homology, which represents coverage holes. Then, we formulate the problem of localizing coverage holes as an optimization problem for computing a sparse generator of the first homology. Furthermore, we show that one can detect redundancies in the sensor network by finding a sparse generator of the second homology of the cover relative to its boundary. We demonstrate how subgradient methods can be used in solving these optimization problems in a distributed manner. Finally, we provide simulations that illustrate the performance of our algorithms.
A Necessary and Sufficient Condition for Consensus Over Random Networks
Creators: name: Tahbaz-Salehi, Alireza
name: Jadbabaie, Ali
Publisher: name: Columbia University
Year: 2008
Subjects: Business
Economics

description: We consider the consensus problem for stochastic discrete-time linear dynamical systems. The underlying graph of such systems at a given time instance is derived from a random graph process, independent of other time instances. For such a framework, we present a necessary and sufficient condition for almost sure asymptotic consensus using simple ergodicity and probabilistic arguments. This easily verifiable condition uses the spectrum of the average weight matrix. Finally, we investigate a special case for which the linear dynamical system converges to a fixed vector with probability
Adjusting Election Expectations
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Political science
subject: FOS: Political science

description: Elections remain both the most visible and controversial measure of democratization and democracy promotion in much of the world. During the Bush administration it became necessary for academics and other experts to again remind policy makers that elections alone did not mean democracy and that, in fact, elections sometimes did little to ameliorate existing problems and tensions in post-conflict or democratizing countries. This was part of the backlash against democracy assistance which was sparked by Bush's often reductively simple approach to the issue. Because of this backlash it became necessary to defend elections on the somewhat obvious grounds that while they may not be sufficient to make a country a democracy, it is pretty clear that a country that does not have free and fair elections cannot be a democracy.
On Afghanistan and Presidential Certainty
Creators: name: Mitchell, Lincoln A.
Publisher: name: Columbia University
Year: 2010
Subjects: subject: Political science
subject: FOS: Political science
subject: Public policy (Law)

description: The war in Afghanistan threatens to do to President Obama what Vietnam did to President Lyndon Johnson. We are not there yet as public concern over Afghanistan is not yet close to what it was over Vietnam by the late 1960s. Nonetheless, Afghanistan may become the major issue which dominates Obama's presidency, overshadows any domestic accomplishments and for which Obama will be remembered. This is particularly true given that Obama's domestic legislative accomplishments are far less impressive than those of LBJ.
title: Pictorial Review of Imaging Features of Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia (DIPNECH)
Creators: name: Hussain, Shahid
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Performed at one institution
subject: Observational
subject: Retrospective
subject: Neoplasia
subject: Education
subject: CT
subject: Thorax
subject: Respiratory system
subject: Lung
subject: Chest

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The objective of this pictorial review is to recognize and describe various imaging features of diffuse idiopathic pulmonary neuroendocrine cell hyperplasia...
title: Skull base and temporal lobe abnormalities in FGFR3- related skeletal dysplasias: A pictorial essay
Creators: name: Ferreira, Arthur
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Congenital
subject: Education
subject: MR
subject: CT
subject: Paediatric
subject: Neuroradiology brain
subject: Head and neck
subject: Neuro
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To recognize the findings related to the skull base and temporal lobe malformations in FGFR3-related skeletal dysplasias...
Influence of Landau level mixing on the properties of elementary excitations in graphene in strong magnetic field
Creators: name: Lozovik, Yu. E.
name: Sokolik, A. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Massless Dirac electrons in graphene fill Landau levels with energies scaled as square roots of their numbers. Coulomb interaction between electrons leads to mixing of different Landau levels. The relative strength of this interaction depends only on dielectric susceptibility of surrounding medium and can be large in suspended graphene. We consider influence of Landau level mixing on the properties of magnetoexcitons and magnetoplasmons - elementary electron-hole excitations in graphene in quantizing magnetic field. We show that, at small enough background dielectric screening, the mixing leads to very essential change of magnetoexciton and magnetoplasmon dispersion laws in comparison with the lowest Landau level approximation.
description: Ref. [26] was added and Ref. [18] was updated
title: Rhino-orbital mucormycosis: MDCT findings.
Creators: name: BIgnardi, Elio
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Performed at one institution
subject: Diagnostic or prognostic study
subject: Retrospective
subject: Infection
subject: Diagnostic procedure
subject: CT
subject: Head and neck
subject: Head and Neck

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The aim of this study was evaluate the MDCT findings of the rhino-orbital mucormycosis. Mucormycosis is an invasive fungal infection usually observed in immunocompromised patients. Mucormycosis is rapidly fatal without an early diagnosis and...
title: Chest tomosynthesis: technical principles, current applications and future perspectives
Creators: name: Marrocchio, Cristina
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Not applicable
subject: Not applicable
subject: Patterns of Care
subject: Diagnostic procedure
subject: Cost-effectiveness
subject: Digital radiography
subject: Conventional radiography
subject: Thorax
subject: Respiratory system
subject: Lung
subject: Chest

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To become acquainted with the basic technical principles of chest tomosynthesis and its current use in clinical...
Bioenergy and social sustainability in Yucatan, Mexico: an elaborated understanding based on energy justice
Creators: name: Banerjee, Aparajita
Publisher: name: Mountain Scholar
Year: 2017
Subjects: human development
energy consumption
biomass fuel
renewable energy
energy needs
low-carbon economy

description: Presented at the Environmental justice in the Anthropocene symposium held on April 24-25, 2017 at the Lory Student Center, Colorado State University, Fort Collins Colorado. This symposium aims to bring together academics (faculty and graduate students), independent researchers, community and movement activists, and regulatory and policy practitioners from across disciplines, research areas, perspectives, and different countries. Our overarching goal is to build on several decades of EJ research and practice to address the seemingly intractable environmental and ecological problems of this unfolding era. How can we explore EJ amongst humans and between nature and humans, within and across generations, in an age when humans dominate the landscape? How can we better understand collective human dominance without obscuring continuing power differentials and inequities within and between human societies? What institutional and governance innovations can we adopt to address existing challenges and to promote just transitions and futures?
description: Includes bibliographical references.
description: A few years back jatropha projects were promoted in Yucatan, Mexico like many other countries in the global south for bioenergy production mainly by federal agencies. The aim was that jatropha biodiesel projects would provide energy security along with rural economic revitalization. When the projects started their operations, community members living proximate to the projects got localized employments that benefited them in some ways. However, some years later, the projects closed down due to several reasons. In this paper, we present results of our qualitative study conducted in rural Yucatan to understand how the communities were affected by the projects, and how the projects did not ensure long-term socio-economic sustainability of the area. We also show that though the Yucatecan bioenergy projects were aimed to solve fossil-fuel energy-based problems like energy crisis and climate change at national and international levels, these projects did not solve localized energy-related problems. Community members themselves continued using firewood in traditional three-stoned fire pits for their domestic cooking while working in jatropha plantations for producing biodiesel meant for national or international consumers. Based on our results, we argue that while planning bioenergy projects or any other renewable energy projects, it is critical and just to ensure how such projects can improve localized energy access related issues especially when such projects are sited in marginalized rural communities.
Second-class current effects from isospin breaking in tau-->omega pi nu_tau
Creators: name: Paver, Nello
name: Riazuddin
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Second-class weak currents can in the standard model be induced by chiral symmetry breaking. In the specific case of the decay tau-->omega pi nu_tau, dominated by the first-class vector current with the rho quantum numbers, such effects would manifest themselves by small axial vector (or, generally, non-vector) contributions to the decay rate. We present an attempt to estimate such effects, based on a vector and axial-vector dominance model of the relevant matrix elements supplemented by omega-rho mixing. We also give an indication on the amplitude directly mediated by b_1(1235)-->omega pi, in principle also allowed in the standard model by isotopic spin violation.
description: 8 pages, revtex
title: Overview of urinary bladder tumors in CT evaluation
Creators: name: Dumea, Eduard
Publisher: name: European Congress of Radiology
Year: 2020
Subjects: subject: Oncologic Imaging
subject: Anatomy
subject: Oncology
subject: Urinary Tract / Bladder
subject: CT
subject: Diagnostic procedure
subject: Staging
subject: Structured reporting
subject: Cancer
subject: Neoplasia
subject: Not applicable

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To present and illustrate CT semiology and scanning protocol in bladder malignancies. To overview pitfalls in the diagnosis of urinary bladder tumours. To propose a structured report – what do urologists want to...