cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Heterogeneity characterization and genetic mechanism of deepwater fine-grained sedimentary rocks during icehouse period : a case study from the Cline Shale in the Midland Basin, West Texas
Creators: name: Peng, Junwen
name: 0000-0002-5666-3001
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Mudrock petrography
Mudrock sedimentology
Sedimentary geochemistry
Glacioeustatic variation
Late Pennsylvanian

description: Despite being the most abundant sedimentary rocks and having global economic significance, many uncertainties remain concerning the petrographic, sedimentological, and bulk geochemical signatures of fine-grained sedimentary rocks (i.e., mudrocks) in deep-water environments. A systematic and comprehensive petrographic (chapters 2 and 3), sedimentological (chapter 4), and geochemical (chapter 5) studies of the deep-water organic-rich Upper Pennsylvanian Cline Shale, in the Midland Basin, were conducted in this study to elucidate general principles that can inform synthesis depositional and diagenetic models for deep-water fine-grained sedimentary systems. Multiple high-resolution petrographic techniques applied to mudrocks suggest that primary grain assemblages of the Cline Shale are complex and include both intrabasinal and extrabasinal grains. Total Organic Carbon (TOC), porosity, and permeability of the Cline Shale are proportional to the intrabasinal grains content, whereas rock strength is related to the content of intergranular clay-size microquartz cement (originating from biosilicoeus allochems). The composition of primary grain assemblages is believed to further determine the potential diagenetic pathways and evolution of mechanical and petrophysical rock properties. Detailed sedimentological analysis of three continuous cores from the Cline Shale along the dip direction allows us to define seven lithofacies that stack in a repeated pattern, constituting ~8 to 20 m thick composite cycle sets. The apparent cyclicities recorded in the Cline Shale are interpreted to be controlled by high-amplitude glacioeustatic sea-level fluctuations during a period where the earth was in a ice-house state. High-resolution bulk geochemical analysis revealed significant changes in trace-element enrichment pattern and other bulk geochemical signatures in different lithofacies of the Cline Shale. Such variations in geochemical data were believed to be caused by the variations in benthic redox conditions, primary marine productivity, and hydrographic circulation in the basin, which was interpreted to be associated with high-amplitude and high-frequency glacioeustatic oscillations. This dissertation established a high-resolution imaging protocol for shale petrography (chapters 2 and 3) and confirmed a high-resolution energy-dispersive X-ray fluorescence geochemical technique in mudrock elemental composition detection (chapter 5)
End of the World Brane meets $T\bar{T}$
Creators: name: Deng, Feiyu
name: Wang, Zhi
name: Zhou, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: End of the world branes in AdS have been recently used to study problems deeply connected to quantum gravity, such as black hole evaporation and holographic cosmology. With non-critical tension and Neumann boundary condition, the end of the world brane often represents part of the degrees of freedom in AdS gravity and geometrically it is only part of the entire boundary. On the other hand, holographic $T\bar{T}$ deformation can also give a boundary as a cutoff surface for AdS gravity. In this paper we consider AdS gravity with both the end of the world boundary and the cutoff boundary. Using partial reduction we obtain a brane world gravity glued to a $T\bar{T}$ deformed bath. We compute both entanglement entropy and Page curve, and find agreement between the holographic results and island formula results.
description: 1+26 pages, 11 figures
Generation of THz radiation through molecular modulation in hydrogen-filled hybrid anti-resonant fibers
Creators: name: Loranger, Sebastien
name: Jafari, Foroogh
name: Zubia, Joseba
name: Novoa, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the generation of narrowband terahertz (THz) pulses by stimulated Raman scattering and molecular modulation in hydrogen-filled hybrid hollow-core fibers. Using a judicious combination of materials and transverse structures, this waveguide design enables simultaneous confinement of optical and THz signals with reasonably low attenuation, as well as high nonlinear overlap. The THz pulses are then generated as the second Stokes band of a ns-long near-infrared pump pulse, aided by Raman coherence waves excited in the gaseous core by the beat-note created by the pump and its first Stokes band. Optimization of the fiber characteristics facilitates phase matching between the corresponding transitions and coherence waves while avoiding coherent gain suppression, resulting in optical-to-THz conversion efficiencies up to 60%, as confirmed by rigorous numerical modelling under ideal conditions. When the current optical material constraints are considered, however, the attainable efficiencies relax to 0.2%, a still competitive value compared to other systems. The approach is in principle power and energy scalable, as well as tunable in the 1 - 10 THz range without any spectral gaps, thereby opening new pathways to the development of fiber-based THz sources complementary to other mature technologies such as quantum cascade lasers.
description: 11 pages, 7 figures
Coagulation-fragmentation model for animal group-size statistics (15-CNA-017)
Creators: name: Degond, Pierre
name: Liu, Jian-Guo
name: Pego, Robert
Publisher: name: Carnegie Mellon University
Year: 2015
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: We study coagulation-fragmentation equations inspired by a simple model proposed in fisheries science to explain data for the size distribution of schools of pelagic fish. Although the equations lack detailed balance and admit no H-theorem, we are able to develop a rather complete description of equilibrium profiles and large-time behavior, based on recent developments in complex function theory for Bernstein and Pick functions. In the large-population continuum limit, a scaling-invariant regime is reached in which all equilibria are determined by a single scaling profile. This universal profile exhibits power-law behavior crossing over from exponent −2/3 for small size to −3/2 for large size, with an exponential cut-off.
Efficient boundary corrected Strang splitting
Creators: name: Einkemmer, Lukas
name: Moccaldi, Martina
name: Ostermann, Alexander
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Strang splitting is a well established tool for the numerical integration of evolution equations. It allows the application of tailored integrators for different parts of the vector field. However, it is also prone to order reduction in the case of non-trivial boundary conditions. This order reduction can be remedied by correcting the boundary values of the intermediate splitting step. In this paper, three different approaches for constructing such a correction in the case of inhomogeneous Dirichlet, Neumann, and mixed boundary conditions are presented. Numerical examples that illustrate the effectivity and benefits of these corrections are included.
Machine learning algorithms for solving some seismic inversion challenges
Creators: name: Phan, Son Dang Thai
name: 0000-0001-5023-5228
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Machine learning
Seismic inversion
Inversion challenges
Uncertainty mapping
Boltzmann machines

description: Seismic inversion is a popular quantitative approach to extract some of the subsurface properties from seismic amplitudes by utilizing the physics of the wave propagation through earth layers, in forms of the empirical formulations that simulate the energy distribution phenomenon. Typical inversions are performed with limited offset angles, and in a small time-window, within which the wavelet is assumed to be stationary, and the property contrasts are small across the boundaries. These exposes the process to several major problems: (1) the limited resolution due to wavelet effects, (2) the dependence on some rock physics models when inverting for petrophysical properties, and (3) the resolution discrepancy between the time domain seismic signal and well logs in depth domain. The primary goal of this research is to use machine learning to solve these challenges, by designing and applying proper neural network structures and suitable training schematics. Firstly, a single-layer Boltzmann machine is implemented as an unsupervised learning algorithm to predict the elastic properties at higher resolution than that can be achieved by conventional approaches, while still retaining the physical relationship between the seismic amplitudes and reflectivity series. The high-resolution results are produced from the accurate post-inversion reflectivity series, which is not bounded by the wavelet effects, and novel model update schemes. Secondly, a new multimodal Cross-shape deep Boltzmann machine is designed to simultaneously capture six possible relationships between four different input training data to invert for petrophysical properties from the pre-stack seismic amplitudes in datasets with limited well coverages. This algorithm has a significant advantage in avoiding the uncertainties associated with the data fitting algorithms to create the rock physics models to guide the solution. Last but not the least, a novel multimodal deep learning network is applied to predict the posterior distribution of the subsurface elastic properties from a seismic gather, to resolve the resolution discrepancy challenge, by a smart preparation of the training label in the form of time dependent probability distributions. The biggest advantage of this algorithm is the avoidance of the heuristic calculation of the partition function, which is required to calculate the posterior distributions of common neural network outputs. While the first algorithm requires an input wavelet to constraint the results, the other two algorithms do not, which make them appropriate for inversion in depth domain, or with nonstationary signals
Understanding fluvial topography : morphodynamic processes that build river levees and cut terraces
Creators: name: Hassenruck-Gudipati, Hima Jennifer
name: 0000-0003-3885-7387
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Floodplain
River
Sediment
Topography
Lidar
Fluid dynamics

description: Floodplains capture extreme events on a river when water overtops associated riverbanks. As a river migrates, floodplains adapt to feedback in topography, sediment availability, and flow conditions. Describing how floodplains evolve will improve estimates of sediment, organic carbon, and nutrient storage and help predict changes to a stockholder’s river-adjacent land. This dissertation focuses on pathways between a river and its floodplains as terraces form and as natural levees evolve. Terraces form when floodplains are elevated above the active river due to changes in base-level or water to sediment discharge ratios. Natural levees comprise one of several constructional topography styles separating a river channel and its floodplain. As such, levees regulate the exchanges of solids, solutes, and flow between the river and its overbank surface. First-order questions exist about the amount of sediment transported to the floodplain and flow characteristics that natural levees preserve. The improved resolution provided by airborne lidar has enabled systematic studies of terraces formation and natural levees on the coastal Trinity River, Texas, highlighted below. This dissertation analyzes how floodplains are abandoned as terraces and how modern natural levees are formed on floodplains. In Chapter 2, proxies developed to describe both elevation variations and paleo-channel characteristics preserved on late Pleistocene terraces that confine the modern valley. Results show the abandonment mechanism varies for different terrace sets. In the remaining chapters, I combine high-resolution topography measurements, changes observed with repeated measurements, and field observations to quantify natural levee topography and describe how natural levees evolve. I show a first-order morphodynamic correlation between levee crest elevation and river hydraulics and between levee width and topographic floodplain lows. I further show that the percentage of banks with natural levees increases in the most ocean-ward reach. Levee channels are vital in transporting sediment to the levee-floodplain boundary as bedload transport building out into Gilbert-type deltas in standing water. Lastly, I use a framework that integrates across scales from the grain size to the entire >150 km river reach to show how water flow and sediment transport contributes to levee-scale depositional patterns
MK-fuzzy Automata and MSO Logics
Creators: name: Droste, Manfred
name: Kutsia, Temur
name: Rahonis, George
name: Schreiner, Wolfgang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We introduce MK-fuzzy automata over a bimonoid K which is related to the fuzzification of the McCarthy-Kleene logic. Our automata are inspired by, and intend to contribute to, practical applications being in development in a project on runtime network monitoring based on predicate logic. We investigate closure properties of the class of recognizable MK-fuzzy languages accepted by MK-fuzzy automata as well as of deterministically recognizable MK-fuzzy languages accepted by their deterministic counterparts. Moreover, we establish a Nivat-like result for recognizable MK-fuzzy languages. We introduce an MK-fuzzy MSO logic and show the expressive equivalence of a fragment of this logic with MK-fuzzy automata, i.e., a Büchi type theorem.
description: In Proceedings GandALF 2017, arXiv:1709.01761
The Unus
Creators: name: Ridge, Eleanor
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: Vatlongos
subject: tvk

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Frequency-dependent mechanical properties of geomaterials : laboratory experiments and digital rock physics
Creators: name: Ikeda, Ken, 1993-
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Rock physics
subject: Laboratory measurement
subject: Low-frequency moduli
subject: Digital rock physics
subject: Numerical simulation
subject: Finite element
subject: Finite difference
subject: Computed-tomography

description: Geoscientists often model the subsurface by studying the propagation of seismic waves. As a seismic wave propagates through a medium, its amplitude and phase change according to the medium physical properties. Geoscientists often simplify the rheology of geomaterials to elastic media where elastic properties are frequency-independent. However, geomaterials possess frequency-dependent properties. Such oversimplification can create inaccurate subsurface models. Therefore, often geomaterials should be modeled as frequency-dependent materials using appropriate attenuation models. In this dissertation, I explore the elastic properties of rocks at low-frequencies (~0.1–100 Hz) and ultrasonic frequencies (10⁵-10⁶ Hz). I use laboratory measurements to estimate elastic properties of rocks. These measurements are then compared to Digital Rock Physics (DRP) results, where the same laboratory measurements are numerically simulated on Computed-Tomographic (CT) images. The first part of this dissertation explores elastic properties of a quartz-rich sandstone at ultrasonic frequencies. I demonstrate that the laboratory-measured elastic properties could be efficiently predicted using a new DRP based technique called Segmentation-Less withOut Targets (SLOT). The SLOT method uses the local variation of X-ray attenuation in CT-images to map the density distribution of the corresponding material. Numerical simulations of wave propagations are used to estimate the elastic properties of the sample, and show a small mismatch to the laboratory measurements. The second part of the dissertation focuses on estimating low-frequency elastic properties using the SLOT technique, which has been extended to accommodate the characteristics of a polymineralic carbonate. The modified-SLOT combines segmentation-based DRP with segmentation-less DRP to create elastic property distribution maps. The DRP predictions agree with the laboratory measurements. The last part of the dissertation shows the development of a new apparatus to measure low-frequency attenuation: the Low-Frequency Module (LFM). The mechanical and electronic design of the LFM is carefully chosen to accommodate a decametric sample that can be tested at reservoir pressure-temperature conditions. The design and the limitation of the apparatus are discussed. The newly developed DRP techniques and the state-of-the-art apparatus will help geoscientists exploring the elastic properties of rocks at different bandwidths. Improved estimations of elastic properties will help to better capture subsurface features
Non-Perturbative String Equations for Type 0A
Creators: name: Johnson, Clifford V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Well-defined non-perturbative formulations of the physics of string theories, sometimes with D-branes present, were identified over a decade ago, from a careful study of double scaled matrix models. Following recent work which recasts some of those old results in the context of type 0 string theory, a study is made of a much larger family of models, which are proposed as type 0A models of the entire superconformal minimal series coupled to gravity. This gives many further examples of important physical phenomena, including non-perturbative descriptions of transitions between D-branes and fluxes, tachyon condensation, and holography. In particular, features of a large family of non-perturbatively stable string equations are studied, and results are extracted which pertain to type 0A string theory, with D-branes and fluxes, in this large class of backgrounds. For the entire construction to work, large parts of the spectrum of the supergravitationally dressed superconformal minimal models and that of the gravitationally dressed bosonic conformal minimal models must coincide, and it is shown how this happens. The example of the super-dressed tricritical Ising model is studied in some detail.
description: 29 pages LaTeX
Characterizing reservoir quality for geologic storage of CO2 : a case study from the Lower Miocene shore zone at Matagorda Bay, Texas
Creators: name: Hull, Harry Lejeune
name: 0000-0002-7366-265X
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: CCUS
Storage capacity
Reservoir characterization
Facies
Stratigraphy

description: The geologic storage of anthropogenic CO₂ through Carbon Capture, Utilization, and Storage (CCUS) is necessary to reduce the emissions produced as a biproduct of fossil fuel combustion. This process of injecting CO₂ into the subsurface is known as carbon sequestration and requires the assessment of geologic reservoirs. Depositional processes and the resulting facies and stratigraphic architectures have great influence over reservoir volumetrics and behavior. The objective of this study is to constrain the depositional controls on storage capacity. A subsurface Lower Miocene 2 strandplain/barrier bar complex of the Texas Gulf Coast at Matagorda bay is interpreted and modeled using well data and 3D seismic. These data reveal the presence of a major shore zone that experienced initial progradation through the late highstand and into the lowstand before later retrogradation. The LM2 is then capped by a thick regional shale. A stratigraphic framework is built that captures these changes in shoreline position at both the systems tract and parasequences level. Sediments were strike fed and wave-dominated processes are apparent. Petrophysical properties of this region including porosity are modeled from with machine learning from log data. Machine learning to predict porosity is carried out using a random forest regression in which porosity is a function of lithology and depth. Finally, a 3D reservoir model is built integrating the stratigraphic, facies, and petrophysical properties. Static storage capacity estimates and storage capacity maps are created from the 3D model. Storage capacity is observed to occur at a strike parallel geometry. This “axis” of highest storage capacity tracts with the position of the shore zone in vertical succession highlighting a dependence on the balance between the generation of accommodation and sediment supply. At a higher resolution storage capacity is observed highest within the foreshore where beach ridges are interpreted from seismic stratal slices. High wave energy processes at this position in the shoreline profile are known to create well sorted and therefore highly porous sandstones. Storage capacity is then a direct function of the high wave energy paleo-depositional processes occurring at the shoreline
Enhanced sensitivity distributed sensing of magnetic fields in optical fiber using random Bragg grating
Creators: name: Leymonerie, Antoine
name: Boisvert, Jean-Sebastien
name: Juszczak, Leonie
name: Loranger, Sebastien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We show that the use of Random Optical Grating using UV Exposure (ROGUE) can significantly reduce the noise floor of an optical frequency domain reflectometry (OFDR) measurement of Faraday rotation in the polarization. We compare it with unexposed spun fiber which shows a S/P minimum ratio (signal noise floor) 20 dB higher than when using our ROGUE. High sensitivity magnetic field measurements are achieved by spatially filtering (setting a gage length) the derivative of the S/P ratio's evolution. Example of a calibrated electromagnet spatially resolved B-field measurement is demonstrated, which can measure fields down to 10 mT with 10 cm spatial resolution. The potential for current sensing using such ROGUE apparatus is discussed and simulation shows a noise floor of around 1 A with 40 probing loops spatial resolution.
description: 4 pages, 5 figures
Broadband CPW-based impedance-transformed Josephson parametric amplifier
Creators: name: Qing, Bingcheng
name: Nguyen, Long B.
name: Liu, Xinyu
name: Ren, Hengjiang
name: Livingston, William P.
name: Goss, Noah
name: Hajr, Ahmed
name: Chistolini, Trevor
name: Pedramrazi, Zahra
name: Santiago, David I.
name: Luo, Jie
name: Siddiqi, Irfan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Quantum-limited Josephson parametric amplifiers play a pivotal role in advancing the field of circuit quantum electrodynamics by enabling the fast and high-fidelity measurement of weak microwave signals. Therefore, it is necessary to develop robust parametric amplifiers with low noise, broad bandwidth, and reduced design complexity for microwave detection. However, current broadband parametric amplifiers either have degraded noise performance or rely on complex designs. Here, we present a device based on the broadband impedance-transformed Josephson parametric amplifier (IMPA) that integrates a horn-like coplanar waveguide (CPW) transmission line, which significantly decreases the design and fabrication complexity, while keeping comparable performance. The device shows an instantaneous bandwidth of 700(200) MHz for 15(20) dB gain with an average saturation power of -110 dBm and near quantum-limited added noise. The operating frequency can be tuned over 1.4 GHz using an external flux bias. We further demonstrate the negligible back-action from our device on a transmon qubit. The amplification performance and simplicity of our device promise its wide adaptation in quantum metrology, quantum communication, and quantum information processing.
description: 11 pages, 8 figures
A tangential regularization method for backflow stabilization in hemodynamics
Creators: name: Bertoglio, Cristóbal
name: Caiazzo, Alfonso
Publisher: name: Weierstrass Institute
Year: 2013
Subjects: subject: Navier-Stokes equations
subject: backflow stabilization
subject: blood flow
subject: finite element method
subject: 62P10
subject: 76D05
subject: 76M10
subject: 76Z05
subject: 47.63.-b
subject: 47.11.-j

description: In computational simulations of fluid flows, instabilities at the Neumann boundaries may appear during backflow regime. It is widely accepted that this is due to the incoming energy at the boundary, coming from the convection term, which cannot be controlled when the velocity field is unknown. We propose a stabilized formulation based on a local regularization of the fluid velocity along the tangential directions on the Neumann boundaries. The stabilization term is proportional to the amount of backflow, and does not require any further assumption on the velocity profile. The perfomance of the method is assessed on a two- and three-dimensional Womersley flows, as well as considering a hemodynamic physiological regime in a patient-specific aortic geometry.
Interference Effects in Relativistic Deuteron Electrodisintegration
Creators: name: Poulis, G. I.
name: Donnelly, T. W.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend the relativistic plane--wave impulse approximation formalism to incorporate a specific class of relativistic interference effects for use in describing inclusive electrodisintegration of $^2$H. The role of these ``exchange'' terms for the various response functions accessible in parity--conserving and --violating inclusive processes is investigated and shown, especially for the latter, to have important consequences for experiment. An extension to a simple quasi--deuteron model is also considered.
description: 28 pages (latex), 15 figures available upon request, TRI-PP-93-101 and MIT-CTP#2249
Anomalous Magnetic Moment of Electron in Chern-Simons QED
Creators: name: Das, Ashok
name: Perez, Silvana
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the anomalous magnetic moment of the electron in the Chern-Simons theory in 2+1 dimensions with and without a Maxwell term, both at zero temperature as well as at finite temperature. In the case of the Maxwell-Chern-Simons (MCS) theory, we find that there is an infrared divergence, both at zero as well as at finite temperature, when the tree level Chern-Simons term vanishes, which suggests that a Chern-Simons term is essential in such theories. At high temperature, the thermal correction in the MCS theory behaves as $\frac{1}β \ln βM$, where $β$ denotes the inverse temperature and $M$, the Chern-Simons coefficient. On the other hand, we find no thermal correction to the anomalous magnetic moment in the pure Chern-Simons (CS) theory.
description: 13 pages, 2 figures
Rogue wave formation by accelerated solitons at an optical event horizon
Creators: name: Demircan, Ayhan
name: Amiranashvili, Shalva
name: Brée, Carsten
name: Mahnke, Christoph
name: Mitschke, Fedor
name: Steinmeyer, Günter
Publisher: name: Weierstrass Institute
Year: 2013
Subjects: subject: Rogue wave
subject: Optical soliton
subject: Ultrashort pulse
subject: Optical event horizon
subject: 42.65.Re
subject: 42.65.Ky
subject: 42.65.Tg
subject: 42.81.Dp

description: Rogue waves, by definition, are rare events of extreme amplitude, but at the same time they are frequent in the sense that they can exist in a wide range of physical contexts. While many mechanisms have been demonstrated to explain the appearance of rogue waves in various specific systems, there is no known generic mechanism or general set of criteria shown to rule their appearance. Presupposing only the existence of a nonlinear Schrödinger-type equation together with a concave dispersion profile around a zero dispersion wavelength we demonstrate that solitons may experience acceleration and strong reshaping due to the interaction with continuum radiation, giving rise to extreme-value phenomena. The mechanism is independent of the optical Raman effect. A strong increase of the peak power is accompanied by a mild increase of the pulse energy and carrier frequency, whereas the photon number of the soliton remains practically constant. This reshaping mechanism is particularly robust and is naturally given in optics in the supercontinuum generation process.
Working on a ship
Creators: name: Ridge, Eleanor
Publisher: name: COCOON - https://cocoon.huma-num.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: Vatlongos
subject: tvk

description: Conforms to: doi:10.34847/cocoon.49aefa90-8c1f-3ba8-a099-0ebefc6a2aa7
Investigating trench sediment consolidation and upper plate structures and their links to seismic behavior using active-source 2D seismic data in south-central Chile and Hikurangi
Creators: name: Olsen, Kelly Marie
name: 0000-0002-2709-9237
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Subduction zones
Seismic data
Earthquakes
Slow slip events
South-central Chile
Hikurangi
Reflection imaging
Sediment

description: Subduction zones are convergent margins where one tectonic plate slides beneath another and is recycled into the mantle. Pelagic, hemi-pelagic, and terrigenous sediment deposited onto the subducting plate is off-scraped onto the overriding plate to form an accretionary prism or subduct beneath the overriding plate on top of the subducting plate, where the sediment is either accreted to the base of the upper plate or subducted to at least volcanic depths, or a combination of these processes can occur. Here, I use 2D active-source marine seismic data to create pre-stack depth migrated images and p-wave velocity models to investigate properties of accreted and subducted sediment and examine accretionary wedge and shallow upper plate structures on two thick-sedimented subduction zone margins, the south-central Chile and Hikurangi margin. These two subduction zones have very different seismic behavior; the south-central Chile margin is the location of the largest and sixth largest instrumentally recorded earthquakes, and has a long history of great earthquakes, while the Hikurangi margin has no evidence of very large ruptures, but both deep and shallow slow slip events are observed along this margin. I first examine the south-central Chile margin using 13 seismic transects across the trench and frontal wedge in south-central Chile to investigate along-strike variations in trench sediment properties to understand the partitioning of trench sediment into accreted vs subducted sediment, and link the properties of the subducting sediment to large megathrust earthquakes that have occurred along this margin. I then analyze upper plate structures along the 13 transects, such as thrust and normal faults imaged in the slope sediment, and discuss the relationship between the mechanisms that formed the faults, the stability of the wedge, and how wedge stability may vary throughout the seismic cycle. I then focus on the Hikurangi margin, where the Hikurangi Plateau, part of the Pacific Plate, subducts beneath the Australian Plate. I use three transects across the trench and accretionary prism to investigate differences in sediment consolidation and frontal wedge development due to seamounts on the incoming plate, and discuss potential implications for slow slip events
Constitutive relations for shear fronts in shear-thickening suspensions
Creators: name: Han, Endao
name: Wyart, Matthieu
name: Peters, Ivo R.
name: Jaeger, Heinrich M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the fronts that appear when a shear-thickening suspension is submitted to a sudden driving force at a boundary. Using a quasi-one-dimensional experimental geometry, we extract the front shape and the propagation speed from the suspension flow field and map out their dependence on applied shear. We find that the relation between stress and velocity is quadratic, as is generally true for inertial effects in liquids, but with a pre-factor that can be much larger than the material density. We show that these experimental findings can be explained by an extension of the Wyart-Cates model, which was originally developed to describe steady-state shear-thickening. This is achieved by introducing a sole additional parameter: the characteristic strain scale that controls the crossover from start-up response to steady-state behavior. The theoretical framework we obtain unifies both transient and steady-state properties of shear-thickening materials.
description: 17 pages, 13 figures
Robust Exponential Worst Cases for Divide-et-Impera Algorithms for Parity Games
Creators: name: Benerecetti, Massimo
name: Dell'Erba, Daniele
name: Mogavero, Fabio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Data Structures and Algorithms (cs.DS)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: The McNaughton-Zielonka divide et impera algorithm is the simplest and most flexible approach available in the literature for determining the winner in a parity game. Despite its theoretical worst-case complexity and the negative reputation as a poorly effective algorithm in practice, it has been shown to rank among the best techniques for the solution of such games. Also, it proved to be resistant to a lower bound attack, even more than the strategy improvements approaches, and only recently a family of games on which the algorithm requires exponential time has been provided by Friedmann. An easy analysis of this family shows that a simple memoization technique can help the algorithm solve the family in polynomial time. The same result can also be achieved by exploiting an approach based on the dominion-decomposition techniques proposed in the literature. These observations raise the question whether a suitable combination of dynamic programming and game-decomposition techniques can improve on the exponential worst case of the original algorithm. In this paper we answer this question negatively, by providing a robustly exponential worst case, showing that no intertwining of the above mentioned techniques can help mitigating the exponential nature of the divide et impera approaches.
description: In Proceedings GandALF 2017, arXiv:1709.01761
SHAXS OG'ISHGAN XULQINING PSIXOLOGIK MEXANIZMLARI
Creators: name: Suleymanova, Tuxtaxon
name: Otamirzayeva, Fotima
Publisher: name: Zenodo
Year: 2024

description: Mazkur  maqolada og`ishgan xulq atvorga moyilligi bo`lgan shaxsning psixikasida ruxiy psixoanalitik mexanizmlarning o`rni va axamiyati ushbu nazariyaning amaliy tadbiqi yoritilgan. “Axloq” tushunchasining barcha ko’rib chiqilgan tavsifnomalari uning shaxsning faoliyat jarayonlaridagi turli ko’rinishlarida ham to’la ma’noda farqlanadi.
Classification of positive solutions of the elliptic equation div (│of delta u][superscript p-2][delta] u) + x ┬╖ [delta] (u[superscript q]) + au[superscript q] = 0 IN R[superscript n]
Creators: name: Leoni, Giovanni
Publisher: name: Carnegie Mellon University
Year: 1997
Subjects: subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Abstract: "We prove the existence and the asymptotic behavior of nonnegative radial ground states of the semilinear elliptic equation div([absolute value of delta u][superscript p-2][delta] u) + x ┬╖ [delta] (u[superscript q]) + ╬▒u[superscript q] = 0, which arises in the study of selfsimilar solutions of degenerate parabolic equations."
A Rare Case of Intraoral Palatal Lipoma
Creators: name: Anuya Satyaprakash Gupta
name: Ghate, Girija Amit
Publisher: name: Zenodo
Year: 2021
Subjects: Adipocytes
benign
intraoral
lipoma
palate

description: Lipomas are the most common benign neoplasms that arise from adipose cells in the human body. Intraoral lipomas are uncommon, accounting for less than 5% of all head and neck cancers. Nonetheless, lipoma should be treated as a differential diagnosis of oral cavity swellings. In the case of intraoral lipoma, surgical excision is the mainstay of treatment. The commonest site of an intraoral lipoma is buccal mucosa due to the abundance of fat, followed by the tongue, lips, floor of the mouth and gingiva, making palate the rarest due to lack of adipose tissue. The lipoma was shown to originate from the soft palate in this case study.It was surgically excised in toto and histopathological examinations were performed to determine a definitive diagnosis. This case is being documented because a lipoma with an intraoral origin is unusual, and even more so when it occurs in the palate.
AViTMP: A Tracking-Specific Transformer for Single-Branch Visual Tracking
Creators: name: Tang, Chuanming
name: Wang, Kai
name: van de Weijer, Joost
name: Zhang, Jianlin
name: Huang, Yongmei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Visual object tracking is a fundamental component of transportation systems, especially for intelligent driving. Despite achieving state-of-the-art performance in visual tracking, recent single-branch trackers tend to overlook the weak prior assumptions associated with the Vision Transformer (ViT) encoder and inference pipeline in visual tracking. Moreover, the effectiveness of discriminative trackers remains constrained due to the adoption of the dual-branch pipeline. To tackle the inferior effectiveness of vanilla ViT, we propose an Adaptive ViT Model Prediction tracker (AViTMP) to design a customised tracking method. This method bridges the single-branch network with discriminative models for the first time. Specifically, in the proposed encoder AViT encoder, we introduce a tracking-tailored Adaptor module for vanilla ViT and a joint target state embedding to enrich the target-prior embedding paradigm. Then, we combine the AViT encoder with a discriminative transformer-specific model predictor to predict the accurate location. Furthermore, to mitigate the limitations of conventional inference practice, we present a novel inference pipeline called CycleTrack, which bolsters the tracking robustness in the presence of distractors via bidirectional cycle tracking verification. In the experiments, we evaluated AViTMP on eight tracking benchmarks for a comprehensive assessment, including LaSOT, LaSOTExtSub, AVisT, etc. The experimental results unequivocally establish that, under fair comparison, AViTMP achieves state-of-the-art performance, especially in terms of long-term tracking and robustness. The source code will be released at https://github.com/Tchuanm/AViTMP.
description: IEEE Transactions on Intelligent Vehicles
Dynamics and Coalitions in Sequential Games
Creators: name: Brihaye, Thomas
name: Geeraerts, Gilles
name: Hallet, Marion
name: Roux, Stéphane Le
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We consider N-player non-zero sum games played on finite trees (i.e., sequential games), in which the players have the right to repeatedly update their respective strategies (for instance, to improve the outcome wrt to the current strategy profile). This generates a dynamics in the game which may eventually stabilise to a Nash Equilibrium (as with Kukushkin's lazy improvement), and we argue that it is interesting to study the conditions that guarantee such a dynamics to terminate. We build on the works of Le Roux and Pauly who have studied extensively one such dynamics, namely the Lazy Improvement Dynamics. We extend these works by first defining a turn-based dynamics, proving that it terminates on subgame perfect equilibria, and showing that several variants do not terminate. Second, we define a variant of Kukushkin's lazy improvement where the players may now form coalitions to change strategies. We show how properties of the players' preferences on the outcomes affect the termination of this dynamics, and we thereby characterise classes of games where it always terminates (in particular two-player games).
description: In Proceedings GandALF 2017, arXiv:1709.01761
Possible Detection of Gamma Ray Air Showers in Coincidence with BATSE Gamma Ray Bursts
Creators: name: Lin, T. F.
name: Carpenter, J.
name: Desch, S.
name: Gress, J.
name: Poirier, J.
name: Roesch, A.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Project GRAND presents the results of a search for coincident high-energy gamma ray events in the direction and at the time of nine Gamma Ray Bursts (GRBs) detected by BATSE. A gamma ray has a non-negligible hadron production cross section; for each gamma ray of energy of 100 GeV, there are 0.015 muons which reach detection level (Fasso & Poirier, 1999). These muons are identified and their angles are measured in stations of eight planes of proportional wire chambers (PWCs). A 50 mm steel plate above the bottom pair of planes is used to distinguish muons from electrons. The mean angular resolution is 0.26 degrees over a +/- 61 degree range in the XZ and YZ planes. The BATSE GRB catalogue is examined for bursts which are near zenith for Project GRAND. The geometrical acceptance is calculated for each of these events. The product is then taken of the GRB flux and GRAND's geometrical acceptance. The nine sources with the best combination of detection efficiency and BATSE's intensity are selected to be examined in the data. The most significant detection of these nine sources is at a statistical significance of +3.7 sigma; this is also the GRB with the highest product of GRB flux and geometrical acceptance.
description: 4 pages. Superseded by astro-ph/0004379
On the role of the Helmholtz-decomposition in mixed methods for incompressible flows and a new variational crime
Creators: name: Linke, Alexander
Publisher: name: Weierstrass Institute
Year: 2013
Subjects: subject: mixed finite elements
subject: incompressible Navier-Stokes equations
subject: poor mass conservation
subject: variational crime
subject: stability
subject: 65N30
subject: 65N12
subject: 35Q30

description: According to the Helmholtz decomposition, the irrotational parts of the momentum balance equations of the incompressible Navier-Stokes equations are balanced by the pressure gradient. Unfortunately, nearly all mixed methods for incompressible flows violate this fundamental property, resulting in the well-known numerical instability of poor mass conservation. The origin of this problem is the lack of L2-orthogonality between discretely divergence-free velocities and irrotational vector fields. In order to cure this, a new variational crime using divergence-free velocity reconstructions is proposed. Applying lowest order Raviart-Thomas velocity reconstructions to the nonconforming Crouzeix-Raviart element allows to construct a cheap flow discretization for general 2d and 3d simplex meshes that possesses the same advantageous robustness properties like divergence-free flow solvers. In the Stokes case, optimal a-priori error estimates for the velocity gradients and the pressure are derived. Moreover, the discrete velocity is independent of the continuous pressure. Several detailed linear and nonlinear numerical examples illustrate the theoretical findings.
Isotropic-nematic interfacial tension of hard and soft rods: application of advanced grand canonical biased sampling techniques
Creators: name: Vink, R. L. C.
name: Wolfsheimer, S.
name: Schilling, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Coexistence between the isotropic and the nematic phase in suspensions of rods is studied using grand canonical Monte Carlo simulations with a bias on the nematic order parameter. The biasing scheme makes it possible to estimate the interfacial tension gamma in systems of hard and soft rods. For hard rods with L/D=15, we obtain gamma ~ 1.4 kB T/L^2, with L the rod length, D the rod diameter, T the temperature, and kB the Boltzmann constant. This estimate is in good agreement with theoretical predictions, and the order of magnitude is consistent with experiments.
description: 10 pages, 10 figures
What can we learn from a second phi meson peak in ultrarelativistic nuclear collisions?
Creators: name: Ko, Che Ming
name: Seibert, David
Publisher: name: arXiv
Year: 1993
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The decay width of a phi meson is reduced from its vacuum value as its mass decreases in hot hadronic matter as a result of the partial restoration of chiral symmetry. This reduction is, however, cancelled by collisional broadening through the reactions $ϕπ\to KK^*$, $ϕK\toϕK$, $ϕρ\to KK$, and $ϕϕ\to KK$. The resulting phi meson width in hot hadronic matter is found to be less than about 10 MeV for temperatures below 200 MeV. If hadronic matter has a strong first-order phase transition, this narrow phi meson with reduced mass will appear as a second peak in the dilepton spectrum in ultrarelativistic heavy ion collisions. We discuss use of this second phi peak to determine the transition temperature and the lifetime of the two-phase coexistence region in the case of a strong first-order phase transition. We also discuss using the peak to determine the range of temperatures over which the transition occurs in the case of a smooth but fast change in the entropy density.
description: 9 pages (latex) plus 4 figures (included as uuencoded postscript files), CERN-TH.7037/93. Replaced because of small change in Fig. 4
Monitoring TES Loop Gain in Frequency Multiplexed Readout
Creators: name: de Haan, T.
name: Adkins, T.
name: Hazumi, M.
name: Kaneko, D.
name: Montgomery, J.
name: Smecher, G.
name: Suzuki, A.
name: Zhou, Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a method for precise monitoring of the loop gain of transition edge sensors (TES) under electrothermal feedback. The measurement is implemented on the ICE DfMux electronics and operates simultaneously with Digital Active Nulling (DAN). It uses one additional bias sinusoid per TES and does not require any additional readout channels. The loop gain monitor is being implemented on the Simons Array and is an integral part of the baseline calibration strategy for the upcoming LiteBIRD satellite.