cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The Effects of a Ketone Body on Synaptic Transmission
Creators: name: Stanback, Alexandra
Publisher: name: University of Kentucky Libraries
Year: 2019

description: The ketogenic diet is commonly used to control epilepsy, especially in cases when medications cannot. The diet typically consists of high fat, low carb, and adequate protein and produces a metabolite called acetoacetate. Seizure activity is characterized by glutamate excitotoxicity and therefore glutamate regulation is a point of research for control of these disorders. Acetoacetate is heavily implicated as the primary molecule responsible for decreasing glutamate in the synapse; it is believed that acetoacetate interferes with the transport of glutamate into the synaptic vesicles. The effects on synaptic transmission at glutamatergic synapses was studied in relation to the ketogenic diet in Drosophila larvae for this thesis. Various measures of synaptic transmission were conducted. Acetoacetate decreased neurotransmission at the synapse. It was also found that acetoacetate has direct effects on the postsynaptic membrane, which indicates a novel role for the metabolite.
description: Copyright © Alexandra Elizabeth Stanback 2019
The Dependence of Southern Ocean Meridional Overturning on Wind Stress
Creators: name: Abernathey, Ryan Patrick
name: Marshall, John
name: Ferreira, David
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Meridional overturning circulation
subject: Mass transfer
subject: Fluid dynamics
subject: Eddies
subject: Oceanography
subject: FOS: Earth and related environmental sciences

description: An eddy-resolving numerical model of a zonal flow, meant to resemble the Antarctic Circumpolar Current, is described and analyzed using the framework of J. Marshall and T. Radko. In addition to wind and buoyancy forcing at the surface, the model contains a sponge layer at the northern boundary that permits a residual meridional overturning circulation (MOC) to exist at depth. The strength of the residual MOC is diagnosed for different strengths of surface wind stress. It is found that the eddy circulation largely compensates for the changes in Ekman circulation. The extent of the compensation and thus the sensitivity of the MOC to the winds depend on the surface boundary condition. A fixed-heat-flux surface boundary severely limits the ability of the MOC to change. An interactive heat flux leads to greater sensitivity. To explain the MOC sensitivity to the wind strength under the interactive heat flux, transformed Eulerian-mean theory is applied, in which the eddy diffusivity plays a central role in determining the eddy response. A scaling theory for the eddy diffusivity, based on the mechanical energy balance, is developed and tested; the average magnitude of the diffusivity is found to be proportional to the square root of the wind stress. The MOC sensitivity to the winds based on this scaling is compared with the true sensitivity diagnosed from the experiments.
Deep and fast Solar System flybys: The controversial case of WD 0810-353
Creators: name: Marcos, R. de la Fuente
name: Marcos, C. de la Fuente
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. Most flybys in the Galactic disk are distant, beyond 10,000 AU, and have characteristic velocities of about 70 km/s. However, deep and fast encounters also take place, albeit with lower probability, particularly if one of the objects involved is a stellar remnant ejected during a supernova. WD 0810-353 might be a high velocity white dwarf, and it was recently identified as heading straight for the Solar System; however, the Gaia DR3 data that support its future deep and fast flyby are regarded as suspicious. Aims. Here, we reanalyze the Gaia DR3 data set associated with WD 0810-353 to confirm or reject the reality of its Solar System flyby and also to investigate its possible runaway status. Methods. We studied the evolution of WD 0810-353 forward in time using N-body simulations. We computed the distribution of distances of closest approach and their associated times of perihelion passage. We used a statistical analysis of the kinematics of this object to assess its possible hypervelocity. We compared its mean BP/RP spectrum to those of other well-studied white dwarfs. Results. We confirm that WD 0810-353 is headed for the Solar System, but the actual parameters of the encounter depend strongly on its radial velocity. The Gaia DR3 value of -373.74+/-8.18 km/s is strongly disfavored by our analyses. Its mean BP/RP spectrum suggests a value over ten times higher based on the position of its putative Halpha line. However, spectral matching using other white dwarfs with non-Gaia data indicate a radial velocity in the interval (-60, -70) km/s. Conclusions. These results confirm the future flyby of WD 0810-353 near the Solar System, although the relative velocity could be high enough or the minimum approach distance large enough to preclude any significant perturbation on the Oort cloud.
description: 10 pages, 9 figures. Accepted for publication in Astronomy and Astrophysics
Entropy of subordinate shift spaces
Creators: name: Kulczycki, Marcin
name: Kwietniak, Dominik
name: Li, Jian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 37B10, 37B40

description: We introduce a new family of shift spaces --- the subordinate shifts. Using subordinate shifts we prove in an elementary way that for every nonnegative real number $t$ there is a shift space with entropy $t$.
description: Following the referee's suggestion we have split Entropy and independence in symbolic dynamics iton two parts. The present version contains the first part of that older preprint, and it is renamed accordingly. The rest will appear elsewhere. Accepted for publication in the American Mathematical Monthly
mqdtfit: A collection of Python functions for empirical multichannel quantum defect calculations
Creators: name: Potvliege, R. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Python functions distributed with this article can be used for calculating the parameters of multichannel quantum defect theory models describing excited bound states of complex atoms. These parameters are obtained by fitting a model to experimental data provided by the user. The two main formulations of the theory are supported, namely the one in which the parameters of the model are a set of eigen channel quantum defects and a transformation matrix, and the one where these parameters are the elements of a reactance matrix. The distribution includes programs for calculating theoretical energy levels, calculating mixing coefficients and channel fractions and producing Lu-Fano plots.
description: Accepted for publication in Computer Physics Communications. The codes will be accessible from this journal's repository upon publication, as well as from https://github.com/durham-qlm/mqdtfit
Czechia - Building PID strategy from the bottom up
Creators: name: Černohlávková, Petra
name: Heringová, Hana
Publisher: name: Zenodo
Year: 2023
Subjects: DataCite Connect Gothenburg 2023
PID Strategies
PID

description: The DataCite Connect event in Gothenburg provides a forum for discussion and networking for DataCite members and the broader community. The session will focus on national PID and Open Research strategies and how the DataCite community can engage in, contribute to, and support their implementation. Participants will learn about ongoing efforts across different regions and will have the chance to work together to identify and discuss alignments between national strategies and their current/future plans that leverage the DataCite infrastructure and services. The outcomes of the meeting will help DataCite members and the community to understand the PID landscape in other regions better, connect with PID champions, and establish new collaborations. There will be plenty of time for Q&A! This event is co-located with the Research Data Alliance 20th Plenary Meeting, 21-23 March 2023, Gothenburg, Sweden, hosted by Chalmers University of Technology, the University of Gothenburg and the Swedish National Data Service (SND). In their presentation Petra Černohlávková and Hana Heringová discuss the topic of national PID strategies in Czechia.
Non-separable wave evolution equations in quantum kinetics
Creators: name: Dedes, C
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Physics (physics.gen-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A non-separable wave-like integro-differential equation for the time evolution of the Wigner distribution function in phase space is educed from the corresponding separable kinetic equation. It is shown that it leads to non-local dispersion effects that may involve complex group velocities and also display non-unitary features as entropy production. By employing the quantum hydrodynamical description a non-local evolution wave equation is also derived by synthesizing the Hamilton-Jacobi equation with that of continuity, which predicts the generation of quadrupole quantum effects in the propagation of the spatial probability density. Extension of the formalism for a boson scalar field is also presented along with a brief commentary on the issue of irreversibility.
Detuning-dependent narrowing of Mollow triplet lines of driven quantum dots
Creators: name: Saiko, A. P.
name: Fedaruk, R.
name: Markevich, S. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the two-time correlation function and the resonance fluorescence spectrum of a semiconductor quantum dot excited by a strong off-resonant laser pulse. The obtained analytical expressions exhibit a specific detuning-dependent damping of Rabi oscillations of the dressed quantum dot as well as a detuning-dependent width of Mollow-triplet lines. In the absence of pure dephasing, the central peak of the triplet is broadened, upon increasing detuning, but the blue and red side peaks are narrowed. We demonstrate that pure dephasing processes can invert these dependences. A crossover between the regimes of detuning-dependent narrowing and broadening of the side and central peaks is identified. The predicted effects are consistent with resent experimental results and numerical calculations.
description: 13 pages, 5 figures
Phase Speed Cross Spectra of Eddy Heat Fluxes in the Eastern Pacific
Creators: name: Abernathey, Ryan Patrick
name: Wortham, Cimarron
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Eddies
subject: Rossby waves
subject: Diffusion
subject: Fluid dynamics
subject: Oceanography
subject: FOS: Earth and related environmental sciences

description: This study investigates the observed spectral character of eddy heat fluxes near the ocean surface, focusing on the distribution in wavenumber and phase speed space. Eddy heat fluxes in the eastern Pacific are calculated from concurrent satellite sea surface height and sea surface temperature data. A high-resolution coupled climate model is also analyzed in order to verify the physical mechanisms involved and to validate the model against observations. Wavenumber, frequency, and phase speed power spectra and cross spectra are constructed and presented as a function of latitude. These spectra reveal the dominance of coherent mesoscale eddies in both the length scale and phase speed of eddy heat fluxes. The breadths of the spectra are characterized via spectral moments; these moments show that the eddy fluxes are relatively concentrated around the dominant wavenumber and phase speed. Good agreement is found between the model and the observed spectra. The integrated heat transport and corresponding eddy diffusivity are shown to compare well with previous studies, but the results give a deeper insight into what determines the heat flux. Implications for eddy parameterization are discussed.
Agent Approach in Support of Enterprise Application Integration
Creators: name: Benmerzoug, Djamel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: The present approach highlights the synergies between application integration and interaction protocols. Since both fields have advanced in different directions, a number of important technical problems can be addressed by their proper synthesis. In our previous work, we proposed a methodological approach based on Interaction Protocols for Enterprise Applica tion Integration (EAI). This approach permits to specify MAS (Multi-Agent System) interaction protocols, verify their behavior and use them to integrate multiple business applications. The result of the proposed approach is a validated interaction protocol. Based on this protocol, we define in this paper, an agent- based architecture for the EAI. It includes all the concepts nec- essary to support communication and coordination mechanisms such as inter-agent and agent-Web services communication.
description: 7 pages, Journal paper
AI and ML Accelerator Survey and Trends
Creators: name: Reuther, Albert
name: Michaleas, Peter
name: Jones, Michael
name: Gadepally, Vijay
name: Samsi, Siddharth
name: Kepner, Jeremy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences
subject: C.1.4; C.4

description: This paper updates the survey of AI accelerators and processors from past three years. This paper collects and summarizes the current commercial accelerators that have been publicly announced with peak performance and power consumption numbers. The performance and power values are plotted on a scatter graph, and a number of dimensions and observations from the trends on this plot are again discussed and analyzed. Two new trends plots based on accelerator release dates are included in this year's paper, along with the additional trends of some neuromorphic, photonic, and memristor-based inference accelerators.
description: 10 pages, 4 figures, 2022 IEEE High Performance Extreme Computing (HPEC) Conference. arXiv admin note: substantial text overlap with arXiv:2009.00993, arXiv:2109.08957
ISLOMIY G'OYALARNING POETIK TALQIN
Creators: name: Norov Otajon  filologiya fanlari bo'yicha falsafa doktori (PhD)  QDU tadqiqotchisi
Publisher: name: Zenodo
Year: 2023

description: Аннотация:Mazkur maqolada  islomiy she'riyatning shakliy-uslubiy, g'oyaviy-badiiy xususiyatlari haqida so'z yuritiladi. Jumladan, XX asr intihosi va yangi asr ostonasida yuzaga kelgan badiiy tafakkurdagi misli ko'rilmagan o'zgarishlar falsafiy qamrov darajasini tubdan isloh qilish imkonini berdi. Natijada she'r va shoirlik ulkan masala, mas'uliyat ekanligi borasida atroflicha mushohada yuritildi. 
Kalit so'zlar: islom, so'z, ruh, poetika, moddiyat, falsafa, struktura, axloq, kompozitsiya, kechinma.
Potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets
Creators: name: Livingstone, S. J.
name: Clark, C. D.
name: Woodward, J.
name: Kingslake, Jonathan
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Subglacial lakes
subject: Ice sheets
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Hydrology

description: We use the Shreve hydraulic potential equation as a simplified approach to investigate potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets. We validate the method by demonstrating its ability to recall the locations of <60% of the known subglacial lakes beneath the Antarctic Ice Sheet. This is despite uncertainty in the ice-sheet bed elevation and our simplified modelling approach. However, we predict many more lakes than are observed. Hence we suggest that thousands of subglacial lakes remain to be found. Applying our technique to the Greenland Ice Sheet, where very few subglacial lakes have so far been observed, recalls 1607 potential lake locations, covering 1.2% of the bed. Our results will therefore provide suitable targets for geophysical surveys aimed at identifying lakes beneath Greenland. We also apply the technique to modelled past ice-sheet configurations and find that during deglaciation both ice sheets likely had more subglacial lakes at their beds. These lakes, inherited from past ice-sheet configurations, would not form under current surface conditions, but are able to persist, suggesting a retreating ice-sheet will have many more subglacial lakes than advancing ones. We also investigate subglacial drainage pathways of the present-day and former Greenland and Antarctic ice sheets. Key sectors of the ice sheets, such as the Siple Coast (Antarctica) and NE Greenland Ice Stream system, are suggested to have been susceptible to subglacial drainage switching. We discuss how our results impact our understanding of meltwater drainage, basal lubrication and ice-stream formation.
Entropy Approximation by Machine Learning Regression: Application for Irregularity Evaluation of Images in Remote Sensing
Creators: name: Velichko, Andrei
name: Belyaev, Maksim
name: Wagner, Matthias P.
name: Taravat, Alireza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Approximation of entropies of various types using machine learning (ML) regression methods are shown for the first time. The ML models presented in this study define the complexity of the short time series by approximating dissimilar entropy techniques such as Singular value decomposition entropy (SvdEn), Permutation entropy (PermEn), Sample entropy (SampEn) and Neural Network entropy (NNetEn) and their 2D analogies. A new method for calculating SvdEn2D, PermEn2D and SampEn2D for 2D images was tested using the technique of circular kernels. Training and testing datasets on the basis of Sentinel-2 images are presented (two training images and one hundred and ninety-eight testing images). The results of entropy approximation are demonstrated using the example of calculating the 2D entropy of Sentinel-2 images and R^2 metric evaluation. The applicability of the method for the short time series with a length from N = 5 to N = 113 elements is shown. A tendency for the R^2 metric to decrease with an increase in the length of the time series was found. For SvdEn entropy, the regression accuracy is R^2 > 0.99 for N = 5 and R^2 > 0.82 for N = 113. The best metrics were observed for the ML_SvdEn2D and ML_NNetEn2D models. The results of the study can be used for fundamental research of entropy approximations of various types using ML regression, as well as for accelerating entropy calculations in remote sensing. The versatility of the model is shown on a synthetic chaotic time series using Planck map and logistic map.
description: 25 pages, 24 figures, 4 tables
Diluted Mean-Field Spin-Glass Models at Criticality
Creators: name: Parisi, Giorgio
name: Ricci-Tersenghi, Federico
name: Rizzo, Tommaso
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a method derived by cavity arguments to compute the spin-glass and higher-order susceptibilities in diluted mean-field spin-glass models. The divergence of the spin-glass susceptibility is associated to the existence of a non-zero solution of a homogeneous linear integral equation. Higher order susceptibilities, relevant for critical dynamics through the parameter exponent $λ$, can be expressed at criticality as integrals involving the critical eigenvector. The numerical evaluation of the corresponding analytic expressions is discussed. The method is illustrated in the context of the de Almeida-Thouless line for a spin-glass on a Bethe lattice but can be generalized straightforwardly to more complex situations.
description: v3: typo error in eq. (10) (and similar equations) corrected
Prediction of anisotropy from flow models: A comparison of three methods
Creators: name: Lev, Einat
name: Hager, Bradford H.
Publisher: name: Columbia University
Year: 2008
Subjects: subject: Geodynamics--Methodology
subject: Rheology
subject: Anisotropy
subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Observations of anisotropy in Earth are used regularly as constraints for models of deformation, using various assumptions about the relationship between deformation and the resulting anisotropic fabric. We compare three methods for calculating fabric from velocity fields: tracking of finite strain ellipses, a kinematic crystallographic code, and the evolution of directors. We find that the use of the finite strain ellipse provides only limited prediction capabilities, as it cannot reproduce experimental observations that involve recrystallization. The crystallographic code we tested (a variant of the popular code D-Rex) provides a more complete fabric prediction, but at a much higher computational cost. The directors method provides an intermediate solution: while it does not include some of the more complex crystallographic processes that D-Rex does, the results of this method closely resemble those of D-Rex, at a lower computational cost. The directors are also capable of tracking anisotropy at much larger strains than D-Rex. We conclude that when computation speed is important, for example, in self-consistent geodynamic models with anisotropic rheology, the directors method provides an appropriate approximation.
ALMACAL IX: multi-band ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background
Creators: name: Chen, Jianhang
name: Ivison, R. J.
name: Zwaan, Martin A.
name: Smail, Ian
name: Klitsch, Anne
name: Péroux, Céline
name: Popping, Gergö
name: Biggs, Andrew D.
name: Szakacs, Roland
name: Hamanowicz, Aleksandra
name: Lagos, Claudia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Wide, deep, blind continuum surveys at submillimetre/millimetre (submm/mm) wavelengths are required to provide a full inventory of the dusty, distant Universe. However, conducting such surveys to the necessary depth, with sub-arcsec angular resolution, is prohibitively time-consuming, even for the most advanced submm/mm telescopes. Here, we report the most recent results from the ALMACAL project, which exploits the 'free' calibration data from the Atacama Large Millimetre/submillimetre Array (ALMA) to map the lines of sight towards and beyond the ALMA calibrators. ALMACAL has now covered 1,001 calibrators, with a total sky coverage around 0.3 deg2, distributed across the sky accessible from the Atacama desert, and has accumulated more than 1,000h of integration. The depth reached by combining multiple visits to each field makes ALMACAL capable of searching for faint, dusty, star-forming galaxies (DSFGs), with detections at multiple frequencies to constrain the emission mechanism. Based on the most up-to-date ALMACAL database, we report the detection of 186 DSFGs with flux densities down to S870um ~ 0.2mJy, comparable with existing ALMA large surveys but less susceptible to cosmic variance. We report the number counts at five wavelengths between 870um and 3mm, in ALMA bands 3, 4, 5, 6 and 7, providing a benchmark for models of galaxy formation and evolution. By integrating the observed number counts and the best-fitting functions, we also present the resolved fraction of the cosmic infrared background (CIB) and the CIB spectral shape. Combining existing surveys, ALMA has currently resolved about half of the CIB in the submm/mm regime.
description: 22 pages, 16 figures, accepted for publication in MNRAS
Detection of Risk Predictors of COVID-19 Mortality with Classifier Machine Learning Models Operated with Routine Laboratory Biomarkers
Creators: name: Huyut, Mehmet Tahir
name: Velichko, Andrei
name: Belyaev, Maksim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Medical Physics (physics.med-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Early evaluation of patients who require special care and who have high death-expectancy in COVID-19, and the effective determination of relevant biomarkers on large sample-groups are important to reduce mortality. This study aimed to reveal the routine blood-value predictors of COVID-19 mortality and to determine the lethal-risk levels of these predictors during the disease process. The dataset of the study consists of 38 routine blood-values of 2597 patients who died (n = 233) and those who recovered (n = 2364) from COVID-19 in August-December, 2021. In this study, the histogram-based gradient-boosting (HGB) model was the most successful machine-learning classifier in detecting living and deceased COVID-19 patients (with squared F1 metrics F1^2 = 1). The most efficient binary combinations with procalcitonin were obtained with D-dimer, ESR, D-Bil and ferritin. The HGB model operated with these feature pairs correctly detected almost all of the patients who survived and those who died (precision > 0.98, recall > 0.98, F1^2 > 0.98). Furthermore, in the HGB model operated with a single feature, the most efficient features were procalcitonin (F1^2 = 0.96) and ferritin (F1^2 = 0.91). In addition, according to the two-threshold approach, ferritin values between 376.2 mkg/L and 396.0 mkg/L (F1^2 = 0.91) and pro-calcitonin values between 0.2 mkg/L and 5.2 mkg/L (F1^2 = 0.95) were found to be fatal risk levels for COVID-19. Considering all the results, we suggest that many features combined with these features, especially procalcitonin and ferritin, operated with the HGB model, can be used to achieve very successful results in the classification of those who live, and those who die from COVID-19. Moreover, we strongly recommend that clinicians consider the critical levels we have found for procalcitonin and ferritin properties, to reduce the lethality of the COVID-19 disease.
description: 29 pages, 14 figures, 6 tables
Three-loop Higgs self-coupling beta-function in the Standard Model with complex Yukawa matrices
Creators: name: Bednyakov, A. V.
name: Pikelner, A. F.
name: Velizhanin, V. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Three-loop renormalization group equations for the Higgs self-coupling and Higgs mass parameter are recalculated in the case of complex Yukawa matrices, which encompass general flavour structure of the Standard Model. In addition, the anomalous dimensions both for the quantum Higgs field and its vacuum expectation value are presented in the $\overline{MS}$-scheme. A numerical study of the latter quantities is carried out for a certain set of initial parameters.
description: 14 pages, 2 figures, report numbers added, figures redrawn
Anisotropic viscosity changes subduction zone thermal structure
Creators: name: Lev, Einat
name: Hager, Bradford H.
Publisher: name: Columbia University
Year: 2011
Subjects: Geodynamics
Plate tectonics
Subduction zones

description: Abundant observations of seismic anisotropy in subduction zones attest that the material in the mantle wedge has a strong fabric and therefore should be mechanically anisotropic. In this paper, we examine the effect of anisotropic viscosity on the thermal structure of subduction zone mantle wedges and quantify its importance relative to other thermal and rheological factors. Using two-dimensional finite element kinematic models we find that anisotropic viscosity results in two substantial changes: a hotter slab-wedge interface and time variability of the melt production rate and excess temperatures. Although not as significant as the effect of temperature-dependent viscosity, anisotropy leads to an increase of up to 35°C in the temperature along the slab-wedge interface. A hotter slab-wedge interface can change the depth extent of the seismogenic zone, limit the depth to which hydrous minerals can carry water, and influence flux melting. Time variability of the thermal field is a novel result of adding anisotropic viscosity to our models. This time variability results from heterogeneity in material alignment and could explain temporal changes in subduction zone magmatism without invoking a change in the wedge geometry, slab age, or composition.
Shearless transport barriers in unsteady two-dimensional flows and maps
Creators: name: Farazmand, Mohammad
name: Blazevski, Daniel
name: Haller, George
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We develop a variational principle that extends the notion of a shearless transport barrier from steady to general unsteady two-dimensional flows and maps defined over a finite time interval. This principle reveals that hyperbolic Lagrangian Coherent Structures (LCSs) and parabolic LCSs (or jet cores) are the two main types of shearless barriers in unsteady flows. Based on the boundary conditions they satisfy, parabolic barriers are found to be more observable and robust than hyperbolic barriers, confirming widespread numerical observations. Both types of barriers are special null-geodesics of an appropriate Lorentzian metric derived from the Cauchy--Green strain tensor. Using this fact, we devise an algorithm for the automated computation of parabolic barriers. We illustrate our detection method on steady and unsteady non-twist maps and on the aperiodically forced Bickley jet.
description: Submitted to Physica D
Quantifying the predictability of the timing of jökulhlaups from Merzbacher Lake, Kyrgyzstan
Creators: name: Kingslake, Jonathan
name: Ng, Felix
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Flood forecasting
subject: Glacial lakes
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Hydrology

description: Glacier-dammed lakes can yield subglacial outburst floods (jökulhlaups) repeatedly. Predicting flood timing is crucial for hazard mitigation, but incomplete understanding of flood-initiation physics makes this challenging. Here we examine the predictability of the timing of jökulhlaups from Merzbacher Lake, Kyrgyzstan, using five flood-date prediction models of varying complexity. The simplest model, which offers a benchmark against which the other models are compared, assumes that floods occur on the same date each year. The other four models predict flood dates using a flood-initiation threshold approach and incorporate weather forcing (approximated by the output of two climate reanalyses) behind the meltwater input to the lake; the most complex of these models accounts for a moving subglacial water divide beneath the glacier that dams the lake. Each model is optimized against recorded flood dates to maximize its prediction ability. In terms of their flood prediction ability, our two best models are those that assume a variable outburst threshold governed by the rate of meltwater input to the lake and the rate of lake-level rise. They excel over the simplest and most complex models and correctly predict flood dates to within ±20 days 57.4% of the time. We also quantify the impact of weather uncertainty on prediction success. Our findings can inform practical flood-forecasting schemes and future investigations of flood-initiation physics.
Modular Software for Real-Time Quantum Control Systems
Creators: name: Riesebos, Leon
name: Bondurant, Brad
name: Whitlow, Jacob
name: Kim, Junki
name: Kuzyk, Mark
name: Chen, Tianyi
name: Phiri, Samuel
name: Wang, Ye
name: Fang, Chao
name: Van Horn, Andrew
name: Kim, Jungsang
name: Brown, Kenneth R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Software Engineering (cs.SE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Real-time control software and hardware is essential for operating quantum computers. In particular, the software plays a crucial role in bridging the gap between quantum programs and the quantum system. Unfortunately, current control software is often optimized for a specific system at the cost of flexibility and portability. We propose a systematic design strategy for modular real-time quantum control software and demonstrate that modular control software can reduce the execution time overhead of kernels by 63.3% on average while not increasing the binary size. Our analysis shows that modular control software for two distinctly different systems can share between 49.8% and 91.0% of covered code statements. To demonstrate the modularity and portability of our software architecture, we run a portable randomized benchmarking experiment on two different ion-trap quantum systems.
description: 11 pages, 10 figures
Strong converse for the classical capacity of optical quantum communication channels
Creators: name: Bardhan, Bhaskar Roy
name: Garcia-Patron, Raul
name: Wilde, Mark M.
name: Winter, Andreas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We establish the classical capacity of optical quantum channels as a sharp transition between two regimes---one which is an error-free regime for communication rates below the capacity, and the other in which the probability of correctly decoding a classical message converges exponentially fast to zero if the communication rate exceeds the classical capacity. This result is obtained by proving a strong converse theorem for the classical capacity of all phase-insensitive bosonic Gaussian channels, a well-established model of optical quantum communication channels, such as lossy optical fibers, amplifier and free-space communication. The theorem holds under a particular photon-number occupation constraint, which we describe in detail in the paper. Our result bolsters the understanding of the classical capacity of these channels and opens the path to applications, such as proving the security of noisy quantum storage models of cryptography with optical links.
description: 15 pages, final version accepted into IEEE Transactions on Information Theory. arXiv admin note: text overlap with arXiv:1312.3287
Spin Hall Effect: Symmetry Breaking, Twisting, and Giant Disorder Renormalization
Creators: name: Perkins, David T. S.
name: Veneri, Alessandro
name: Ferreira, Aires
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Atomically-thin materials based on transition metal dichalcogenides and graphene offer a promising avenue for unlocking the mechanisms underlying the spin Hall effect (SHE) in heterointerfaces. Here, we develop a microscopic theory of the SHE for twisted van der Waals heterostructures that fully incorporates twisting and disorder effects, and illustrate the critical role of symmetry breaking in the generation of spin-Hall currents. We find that an accurate treatment of vertex corrections leads to a qualitatively and quantitatively different SHE than that obtained from popular approaches like the ``$i\,η$'' and ladder approximations. A pronounced oscillatory behavior of skew-scattering processes with twist angle, $θ$, is predicted, reflecting a non-trivial interplay of Rashba and valley-Zeeman effects and yields a vanishing SHE for $θ= 30^\circ$ and, for graphene-WSe$_2$, an optimal SHE for $θ\approx 17^\circ$. Our findings reveal disorder and broken symmetries as important knobs to optimize interfacial SHEs.
description: 8 pages, 3 figures (includes supplemental material); accepted version in Phys. Rev. B
Functional Simulation of Real-Time Quantum Control Software
Creators: name: Riesebos, Leon
name: Brown, Kenneth R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Software Engineering (cs.SE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Modern quantum computers rely heavily on real-time control systems for operation. Software for these systems is becoming increasingly more complex due to the demand for more features and more real-time devices to control. Unfortunately, testing real-time control software is often a complex process, and existing simulation software is not usable or practical for software testing. For this purpose, we implemented an interactive simulator that simulates signals at the application programming interface level. We show that our simulation infrastructure simulates kernels 6.9 times faster on average compared to execution on hardware, while the position of the timeline cursor is simulated with an average accuracy of 97.9% when choosing the appropriate configuration.
description: 10 pages, 7 figures, IEEE Quantum Week 2022 best paper award
Phenomenological studies of the low energy dynamics in the $ppK^+K^-$ system
Creators: name: Silarski, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article we review studies of the near threshold $pp \to ppK^+K^-$ reaction done with the COSY-11 and ANKE detectors. We discuss phenomenological studies of the $ppK^+K^-$ dynamics, in particular the recent investigations on the $K^+K^-$ final state interaction are presented.
description: Proceedings of the EFB22 conference (4 pages, 1 figure)
Modelling channelized surface drainage of supraglacial lakes
Creators: name: Kingslake, Jonathan
name: Ng, F.
name: Sole, A.
Publisher: name: Columbia University
Year: 2015
Subjects: subject: Ice sheets--Remote sensing
subject: Ice--Dynamics
subject: Glacial lakes
subject: Geophysics
subject: FOS: Earth and related environmental sciences
subject: Hydrology

description: Supraglacial lakes can drain to the bed of ice sheets, affecting ice dynamics, or over their surface, relocating surface water. Focusing on surface drainage, we first discuss observations of lake drainage. In particular, for the first time, lakes are observed to drain <70 km across the Nivlisen ice shelf, East Antarctica. Inspired by these observations, we develop a model of lake drainage through a channel that incises into an ice-sheet surface by frictional heat dissipated in the flow. Modelled lake drainage can be stable or unstable. During stable drainage, the rate of lake-level drawdown exceeds the rate of channel incision, so discharge from the lake decreases with time; this can prevent the lake from emptying completely. During unstable drainage, discharge grows unstably with time and always empties the lake. Model lakes are more prone to drain unstably when the initial lake area, the lake input and the channel slope are larger. These parameters will vary during atmospheric-warming-induced ablation-area expansion, hence the mechanisms revealed by our analysis can influence the dynamic response of ice sheets to warming through their impact on surface-water routing and storage.
The early-type near-contact binary system V337 Aql revisited
Creators: name: Tuysuz, M.
name: Soydugan, F.
name: Bilir, S.
name: Soydugan, E.
name: Senyuz, T.
name: Yontan, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The close binary V337 Aql consists of two early B-type components with an orbital period of 2.7339 d. New multi-band photometric observations of the system together with published radial velocities enabled us to derive the absolute parameters of the components. The simultaneous light and radial velocity curves solution yields masses and radii of \emph{M$_{1}$}=17.44$\pm$0.31 \emph{M$_\odot$} and \emph{R$_{1}$}=9.86$\pm$0.06 \emph{R$_\odot$} for the primary and \emph{M$_{2}$}=7.83$\pm$0.18 \emph{M$_\odot$} and \emph{R$_{2}$}=7.48$\pm$0.04 \emph{R$_\odot$} for the secondary component. Derived fundamental parameters allow us to calculate the photometric distance as 1355$\pm$160 pc. The present analysis indicates that the system is a near-contact semi-detached binary, in which a primary star is inside its Roche lobe with a filling ratio of 92 percent and the secondary star fills its Roche lobe. From \emph{O-C} data analysis, an orbital period decrease was determined with a rate of -7.6 $\times$ 10$^{-8}$ yr$^{-1}$. Kinematic analysis reveals that V337 Aql has a circular orbit in the Galaxy and belongs to a young thin-disc population.
description: 17 pages, 4 figures and 4 tables, accepted for publication in New Astronomy
Connection between near the $D_s^+D_s^-$ threshold enhancement in $B^+ \to D_s^+D_s^-K^+$ and conventional charmonium $χ_{c0}(2P)$
Creators: name: Guo, Dan
name: Wang, Jun-Zhang
name: Chen, Dian-Yong
name: Liu, Xiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Focusing on recent measurement of $B^+ \to D_s^+D_s^-K^+$ process given by the LHCb Collaboration, we propose that this newly observed near the $D_s^+D_s^-$ threshold enhancement can be due to the contribution of the $χ_{c0}(2P)$, which is a $P$-wave charmonium below the $D_s^+D_s^-$ threshold. By performing a combined fit to the measured $D_s^+D_s^-$, $D_s^+K^+$, and $D_s^-K^+$ invariant mass spectra, introducing the $χ_{c0}(2P)$ can well reproduce the near threshold enhancement in the $D_s^+D_s^-$ invariant mass spectrum. When depicting the whole $D_s^+D_s^-$ invariant mass spectrum, the contributions from higher charmonium $ψ(4230)$ and charmoniumlike state $X_0(4140)$ are obvious. In addition, a charmed meson $D^*(3^3S_1)$ with mass around 3015 MeV is found to be important to depict the $D_s^-K^+$ invariant mass spectrum well. Especially, the importance of node effect of the spatial wave function of the $χ_{c0}(2P)$ is revealed, by which the anomaly of the ratio $Γ(X\to D^+D^-)/Γ(X\to D_s^+D_s^-)$ indicated by LHCb can be explained well. Finally, our scenario of the newly observed enhancement structure resulted from the $χ_{c0}(2P)$ is enforced.
description: 8 pages, 5 figures and 2 tables
An optimal three-way stable and monotonic spectrum of bounds on quantiles: a spectrum of coherent measures of financial risk and economic inequality
Creators: name: Pinelis, Iosif
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Optimization and Control (math.OC)
subject: Statistics Theory (math.ST)
subject: Risk Management (q-fin.RM)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: Primary 52A41, 60E15, 26A51, 26B25, 91B30, 91B82, secondary 60E15, 90C25, 90C26, 49J45, 49J55, 49K30, 49K40, 39B62

description: A certain spectrum, indexed by a\in[0,\infty], of upper bounds P_a(X;x) on the tail probability P(X\geq x), with P_0(X;x)=P(X\geq x) and P_\infty(X;x) being the best possible exponential upper bound on P(X\geq x), is shown to be stable and monotonic in a, x, and X, where x is a real number and X is a random variable. The bounds P_a(X;x) are optimal values in certain minimization problems. The corresponding spectrum, also indexed by a\in[0,\infty], of upper bounds Q_a(X;p) on the (1-p)-quantile of X is stable and monotonic in a, p, and X, with Q_0(X;p) equal the largest (1-p)-quantile of X. In certain sense, the quantile bounds Q_a(X;p) are usually close enough to the true quantiles Q_0(X;p). Moreover, Q_a(X;p) is subadditive in X if a\geq 1, as well as positive-homogeneous and translation-invariant, and thus is a so-called coherent measure of risk. A number of other useful properties of the bounds P_a(X;x) and Q_a(X;p) are established. In particular, quite similarly to the bounds P_a(X;x) on the tail probabilities, the quantile bounds Q_a(X;p) are the optimal values in certain minimization problems. This allows for a comparatively easy incorporation of the bounds P_a(X;x) and Q_a(X;p) into more specialized optimization problems. It is shown that the minimization problems for which P_a(X;x) and Q_a(X;p) are the optimal values are in a certain sense dual to each other; in the case a=\infty this corresponds to the bilinear Legendre--Fenchel duality. In finance, the (1-p)-quantile Q_0(X;p) is known as the value-at-risk (VaR), whereas the value of Q_1(X;p) is known as the conditional value-at-risk (CVaR) and also as the expected shortfall (ES), average value-at-risk (AVaR), and expected tail loss (ETL). It is shown that the quantile bounds Q_a(X;p) can be used as measures of economic inequality. The spectrum parameter, a, may be considered an index of sensitivity to risk/inequality.
title: Prima Elementa Ebraeae, Graecae, & Latinae Lingvarvm; 1601
title: Pro studiosa juuentute disposita
titleType: Subtitle
Creators: name: Hutter, Elias
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2017

description: Text hebräisch, griechisch und lateinisch
O'ZBEKISTONDA QUYOSH PANELLARIDAN FOYDALANISH ISTIQBOLLARI
Creators: name: Raximov, Feruz
Publisher: name: Zenodo
Year: 2025

description: O’zbekistonda bugungi kunda quyosh energiyasi orqali energiya generatsiya quvvati 1,5 GW ga yetgan, generatsiya asosan yirik loyihalar hamda aholi va tadbirkorlik subyektlarining uy tomlariga o’rnatilgan quyosh panellari hisobiga amalga oshirilmoqda. Kelajakda jami energiyada quyosh energiyasi ulushini 2030 yilga kelib 40% gacha oshirish rejalashtirilgan, bu issiqxona gazlarini kamaytirish va energiya xavfsizligini yaxshilashga yordam beradi.
On the homology of Iwasawa cohomology groups
Creators: name: Lim, Meng Fai
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R23, 11R34, 11F80, 16E65

description: A fundamental observation of Iwasawa gives a criterion for a module over the classical Iwasawa algebra to be torsion. In this paper, we study a certain extension of this criterion. We will then apply this to study the structure of the homology of the "Iwasawa cohomology groups" and dual fine Selmer groups.
description: 13 pages. Some minor corrections