cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the suspected timing error in WMAP map-making
Creators: name: Roukema, Boudewijn F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A large fraction of the previously estimated WMAP CMB quadrupole signal would be an artefact of incorrect Doppler dipole subtraction if the hypothesis of a small timing interpolation error were correct. Observations of bright foreground objects constitute part of the time-ordered-data (TOD). Scans of an object in different directions should be shifted by the would-be timing error, causing a blurring effect. Three half-years of the calibrated, filtered WMAP TOD are compiled individually for the four W band differencing assemblies (DA's), with no masking of bright objects, giving 12 maps for each timing offset. Percentiles of the temperature-fluctuation distribution in each map at HEALPix resolution N_side=2048 are used to determine the dependence of all-sky image sharpness on the timing offset. In the W band, the 99.999% percentile, i.e. the temperature fluctuation in the approx 503-rd brightest pixel, is the least noisy percentile. Using this statistic, the hypothesis that a -25.6 ms offset relative to the timing adopted by the WMAP collaboration gives a focus at least as sharp as the uncorrected timing is rejected at 4.6σsignificance. The Q and V band maps also reject the -25.6 ms offset hypothesis at high statistical significance. The requirement that the correct choice of timing offset must maximise image sharpness implies that the hypothesis of a timing error in the WMAP collaboration's compilation of the WMAP calibrated, filtered TOD is rejected at high statistical significance in each of the Q, V and W wavebands. However, the hypothesis that a timing error was applied during calibration of the raw TOD, leading to a dipole-induced difference signal, is not excluded by this method.
description: 8 pages, 6 figures, accepted in Astronomy & Astrophysics; v2 includes dipole difference all-sky map; v3: minor corrections
title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ°Ð±Ð¾ÑÑ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Research of the operation of the reactive power compensation unit
Creators: name: ÐÑÐ°ÑÐ·Ðµ, Ð¡ÐµÑÐ³ÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð°Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑ
ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
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ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ° ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
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Ð·Ð°Ð¼ÐºÐ½ÑÑÐ°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ
reactive power
reactive power coefficient
capacitor bank
reactive power compensation unit
automatic compensation unit
closed control system

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ Â«ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ°Ð±Ð¾ÑÑ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸Â». Ð Ð°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸ ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð² ÑÐ½ÐµÑÐ³Ð¾ÑÐ¸ÑÑÐµÐ¼Ð°Ñ, Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°Ð±Ð¾ÑÑ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸ Ð² ÑÑÐµÐ´Ðµ Matlab SIMULINK Ð¸ ÑÐ°ÑÑÐµÑÑ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¾Ð² ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸. ÐÐ°Ð´Ð°ÑÐ¸, ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÐµÑÐ°Ð»Ð¸ÑÑ Ð² ÑÐ¾Ð´Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ: 1. ÐÐ·ÑÑÐµÐ½Ð¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ñ ÑÐµÐ°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð¸ ÑÐ¿Ð¾ÑÐ¾Ð±Ð¾Ð² ÐµÐµ ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸. 2. Ð£ÑÑÑÐ¾Ð¹ÑÑÐ²Ð¾ Ð¸ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿ ÑÐ°Ð±Ð¾ÑÑ Ð£ÐÐ Ð. 3. Ð Ð°ÑÑÐµÑ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ Ð¸ ÑÑÑÐ¿ÐµÐ½Ð¸ ÑÐµÐ³ÑÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÐÐÐ£. 4. Ð¡Ð¾Ð·Ð´Ð°Ð½Ð¸Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ ÐÐÐ£ Ñ Ð·Ð°Ð¼ÐºÐ½ÑÑÐ¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ð¾Ð¹ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð² ÑÑÐµÐ´Ðµ Matlab SIMULINK.
description: The subject of the graduate qualification work is âResearch of the operation of the reactive power compensation unitâ. The work is devoted to the study of the unit of automatic reactive power compensation in power systems, modeling the operation of the unit in the Matlab SIMULINK environment and calculating the parameters of the unit. The tasks that were solved during the study: 1. The study of the concept of reactive power and ways to compensate for it. 2. The design and the principle of operation of the unit. 3. Calculation of the unit power and control stage. 4. Creation of a model of the unit with a closed control system in the Matlab SIMULINK environment.
Spin transport through a quantum network: Effects of Rashba spin orbit interaction and Aharonov-Bohm flux
Creators: name: Dey, Moumita
name: Maiti, Santanu K.
name: Karmakar, S. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We address spin dependent transport through an array of diamonds in the presence of Rashba spin-orbit (SO) interaction where each diamond plaquette is penetrated by an Aharonov-Bohm (AB) flux $ϕ$. The diamond chain is attached symmetrically to two semi-infinite one-dimensional non-magnetic metallic leads. We adopt a single particle tight-binding Hamiltonian to describe the system and study spin transport using Green's function formalism. After presenting an analytical method for the energy dispersion relation of an infinite diamond chain in the presence of Rashba SO interaction, we study numerically the conductance-energy characteristics together with the density of states of a finite sized diamond network. At the typical flux $ϕ=ϕ_0/2$, a delocalizing effect is observed in the presence of Rashba SO interaction, and, depending on the specific choices of SO interaction strength and AB flux the quantum network can be used as a spin filter. Our analysis may be inspiring in designing spintronic devices.
description: 12 pages, 12 figures
Correlations and linewidth of the atomic beam continuous superradiant laser
Creators: name: Laburthe-Tolra, Bruno
name: Amodjee, Ziyad
name: Pasquiou, Benjamin
name: Robert-de-Saint-Vincent, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We propose a minimalistic model to account for the main properties of a continuous superradiant laser, in which a beam of atoms crosses the mode of a high-finesse Fabry-Perot cavity, and collectively emits light into the cavity mode. We focus on the case of weak single atom - cavity cooperativity, and highlight the relevant regime where decoherence due to the finite transit time dominates over spontaneous emission. We propose an original approach where the dynamics of atoms entering and leaving the cavity is described by a Hamiltonian process. This allows deriving the main dynamical equations for the superradiant laser, without the need for a stochastic approach. We derive analytical conditions for a sustained emission and show that the ultimate linewidth is set by the fundamental quantum fluctuations of the collective atomic dipole. We calculate steady-state values of the two-body correlators and show that the continuous superradiant regime is tied to the growth of atom-atom correlations, although these correlations only have a small impact on the laser linewidth.
description: Submission to Sci-Post
Efficient in-hardware compression of on-chip data
Creators: name: Ghasemazar, Amin
Publisher: name: University of British Columbia
Year: 2021

description: The past decade has seen tremendous growth in how much data is collected and stored, and consequently in the sizes of application working sets. On-chip memory capacities, however, have not kept up: average CPU last-level cache capacity per core (thread) has stagnated at 1MB. Similar trends exist in special-purpose computing systems, with only up to tens of megabytes of on-chip memory available in most recent AI accelerators. In this dissertation, we explore hardware-friendly online data compression techniques to gain the performance benefits of larger on-chip memories without paying the costs of larger silicon. We propose several solutions including two methods to compress general workloads in CPU caches, and two methods to compress AI workloads in special-purpose computing systems. In order to efficiently compress on-chip data, the compression mechanisms need to leverage all relevant data stored in on-chip memory. We propose 2DCC, a cache compression mechanism that leverages redundancy both within and across all cache data blocks, and results in a 2.12× compression factor. We then extend this insight by observing that many on-chip blocks are often similar to each other. We propose Thesaurus, a hardware- level on-line cacheline clustering mechanism to dynamically form clusters as these similar blocks appear in the data access stream. Thesaurus significantly improves the state-of-the-art cache compression ratio to 2.25×. Next, we apply our insights to special-purpose applications. We first pro- pose Channeleon, which tackles the problem of compressing the activation maps in deep neural networks (DNNs) at inference time. Leveraging the observed similarity among activation channels, Channeleon first forms clusters of similar activation channels, and then quantizes activations within each cluster. This enables the activations to have low bit-width while incurring acceptable accuracy losses. Lastly, we propose Procrustes, a sparse DNN training accelerator that prunes weights by exploiting both software and hardware knowledge. Procrustes reduces the memory footprint of models by an order of magnitude while maintaining dense model accuracy.
title: Investigating the influence of technology on Saudi women entrepreneurs overcoming gender discrimination
Creators: name: Almarzouki, Rahaf Anas
Publisher: name: University of Reading
Year: 2021

description: A small number of empirical studies are found in the literature which discuss entrepreneurship in comparative studies in the Gulf region, and which include Saudi Arabia. However, they tend to target entrepreneurship in general, but refer to male entrepreneurs specifically. The study presented in this thesis aims to develop research on women’s entrepreneurship in Saudi Arabia by understanding the effects of discrimination on entrepreneurial behaviour and investigating the influence of technology on entrepreneurship and gender discrimination. A total of 27 female entrepreneurs from the city of Jeddah, in Saudi Arabia, are interviewed and resources-based theory and institutional theory drawn on to investigate the topic. In addition, feminist theory and a feminist approach are applied throughout the research. Key findings suggest that Saudi women encounter cultural and institutional barriers that hinder entrepreneurial behaviour; cultural barriers having the greatest impact. Personal traits and characteristics possessed by these women greatly support their exploitation of opportunity. While different resources aid their entrepreneurial behaviour, technology has played a role not only in enhancing such behaviour, but also in helping Saudi women entrepreneurs overcome gender discrimination. Further, as research has shown, entrepreneurs have an influence on the economic development of many countries. Thus, it is expected that better understanding of the positive effect that Saudi women entrepreneurs have on the Saudi economy will encourage further research into this demographic and the impacts of gender discrimination on their success. Understanding the gender related barriers helps locate potential solutions that aim to minimise gender discrimination and enhance entrepreneurial behaviour and economic development. Finally, technology is found to be a positive factor for Saudi women and a major tool that has helped them overcome the challenges they face.
Exploring the optimality of approximate state preparation quantum circuits with a genetic algorithm
Creators: name: Rindell, Tom
name: Yenilen, Berat
name: Halonen, Niklas
name: Pönni, Arttu
name: Tittonen, Ilkka
name: Raasakka, Matti
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the approximate state preparation problem on noisy intermediate-scale quantum (NISQ) computers by applying a genetic algorithm to generate quantum circuits for state preparation. The algorithm can account for the specific characteristics of the physical machine in the evaluation of circuits, such as the native gate set and qubit connectivity. We use our genetic algorithm to optimize the circuits provided by the low-rank state preparation algorithm introduced by Araujo et al., and find substantial improvements to the fidelity in preparing Haar random states with a limited number of CNOT gates. Moreover, we observe that already for a 5-qubit quantum processor with limited qubit connectivity and significant noise levels (IBM Falcon 5T), the maximal fidelity for Haar random states is achieved by a short approximate state preparation circuit instead of the exact preparation circuit. We also present a theoretical analysis of approximate state preparation circuit complexity to motivate our findings. Our genetic algorithm for quantum circuit discovery is freely available at https://github.com/beratyenilen/qc-ga .
description: 22 pages, 4 figures; version 2 changes: title changed, numerical analysis extended to 1000 random states, references added, other minor improvements, conclusions remain unaltered
Evolution of gaseous disk viscosity driven by supernova explosion. II. Structure and emissions from star-forming galaxies at high redshift
Creators: name: Yan, Chang-Shuo
name: Wang, Jian-Min
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (Abridged) High redshift galaxies are undergoing intensive evolution of dynamical structure and morphologies. We incorporate the feedback into the dynamical equations through mass dropout and angular momentum transportation driven by the SNexp-excited turbulent viscosity. We numerically solve the equations and show that there can be intensive evolution of structure of the gaseous disk. Secular evolution of the disk shows interesting characteristics that are 1) high viscosity excited by SNexp can efficiently transport the gas from 10kpc to $\sim 1$kpc forming a stellar disk whereas a stellar ring forms for the case with low viscosity; 2) starbursts trigger SMBH activity with a lag $\sim 10^8$yr depending on star formation rates, prompting the joint evolution of SMBHs and bulges; 3) the velocity dispersion is as high as $\sim 100~\kms$ in the gaseous disk. In order to compare the present models with the observed dynamical structure and images, we use the incident continuum from the simple stellar synthesis (GALAXEV) and CLOUDY to calculate emission line ratios of H$α$, H$β$, $\OIII$ and $\NII$, and H$α$ brightness of gas photoionized by young massive stars formed on the disks. The models can produce the main features of emission from star forming galaxies and the observed relation between turbulent velocity and the H$α$ brightness. We successfully apply the present model to BX 389 and BX 482 observed in SINS high$-z$ sample, which are bulge and disk-dominated, respectively. High viscosity excited by SNexp is able to efficiently transport the gas into a bulge to maintain high star formation rates, or, to form a stellar ring close enough to the bulge so that it immigrates into the bulge of its host galaxy. This leads to a fast growing bulge. Implications and future work of the present models have been extensively discussed for galaxy formation.
description: Accepted by ApJ; 22 page in emulateapj, 16 color figures
From Merging Frameworks to Merging Stars: Experiences using HPX, Kokkos and SIMD Types
Creators: name: Daiß, Gregor
name: Singanaboina, Srinivas Yadav
name: Diehl, Patrick
name: Kaiser, Hartmut
name: Pflüger, Dirk
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Octo-Tiger, a large-scale 3D AMR code for the merger of stars, uses a combination of HPX, Kokkos and explicit SIMD types, aiming to achieve performance-portability for a broad range of heterogeneous hardware. However, on A64FX CPUs, we encountered several missing pieces, hindering performance by causing problems with the SIMD vectorization. Therefore, we add std::experimental::simd as an option to use in Octo-Tiger's Kokkos kernels alongside Kokkos SIMD, and further add a new SVE (Scalable Vector Extensions) SIMD backend. Additionally, we amend missing SIMD implementations in the Kokkos kernels within Octo-Tiger's hydro solver. We test our changes by running Octo-Tiger on three different CPUs: An A64FX, an Intel Icelake and an AMD EPYC CPU, evaluating SIMD speedup and node-level performance. We get a good SIMD speedup on the A64FX CPU, as well as noticeable speedups on the other two CPU platforms. However, we also experience a scaling issue on the EPYC CPU.
Classical model emerges in quantum entanglement: Quantum Monte Carlo study for an Ising-Heisenberg bilayer
Creators: name: Wu, Siying
name: Yin, Binbin
name: Ran, Xiaoxue
name: Li, Qi-Fang
name: Mao, Bin-Bin
name: Wang, Yan-Cheng
name: Yan, Zheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By developing a cluster sampling of stochastic series expansion quantum Monte Carlo method, we investigate a spin-$1/2$ model on a bilayer square lattice with intra-layer ferromagnetic (FM) Ising coupling and inter-layer antiferromagnetic Heisenberg interaction. The continuous quantum phase transition which occurs at $g_c=3.045(2)$ between the FM Ising phase and the dimerized phase is studied via large scale simulations. From the analyzes of critical exponents we show that this phase transition belongs to the (2+1)-dimensional Ising universality class. Besides, the quantum entanglement is strong between the two layers, especially in dimerized phase. The effective Hamiltonian of single layer seems like a transverse field Ising model. However, we found the quantum entanglement Hamiltonian is a pure classical Ising model without any quantum fluctuations. Furthermore, we give a more general explanation about how a classical entanglement Hamiltonian emerges.
MGA trajectory planning with an ACO-inspired algorithm
Creators: name: Ceriotti, Matteo
name: Vasile, Massimiliano
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Given a set of celestial bodies, the problem of finding an optimal sequence of swing-bys, deep space manoeuvres (DSM) and transfer arcs connecting the elements of the set is combinatorial in nature. The number of possible paths grows exponentially with the number of celestial bodies. Therefore, the design of an optimal multiple gravity assist (MGA) trajectory is a NP-hard mixed combinatorial-continuous problem. Its automated solution would greatly improve the design of future space missions, allowing the assessment of a large number of alternative mission options in a short time. This work proposes to formulate the complete automated design of a multiple gravity assist trajectory as an autonomous planning and scheduling problem. The resulting scheduled plan will provide the optimal planetary sequence and a good estimation of the set of associated optimal trajectories. The trajectory model consists of a sequence of celestial bodies connected by twodimensional transfer arcs containing one DSM. For each transfer arc, the position of the planet and the spacecraft, at the time of arrival, are matched by varying the pericentre of the preceding swing-by, or the magnitude of the launch excess velocity, for the first arc. For each departure date, this model generates a full tree of possible transfers from the departure to the destination planet. Each leaf of the tree represents a planetary encounter and a possible way to reach that planet. An algorithm inspired by Ant Colony Optimization (ACO) is devised to explore the space of possible plans. The ants explore the tree from departure to destination adding one node at the time: every time an ant is at a node, a probability function is used to select a feasible direction. This approach to automatic trajectory planning is applied to the design of optimal transfers to Saturn and among the Galilean moons of Jupiter.
The intergalactic magnetic field constrained by Fermi/LAT observations of the TeV blazar 1ES 0229+200
Creators: name: Tavecchio, F.
name: Ghisellini, G.
name: Foschini, L.
name: Bonnoli, G.
name: Ghirlanda, G.
name: Coppi, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: TeV photons from blazars at relatively large distances, interacting with the optical-IR cosmic background, are efficiently converted into electron-positron pairs. The produced pairs are extremely relativistic (Lorentz factors of the order of 1e6 1e7 and promptly loose their energy through inverse Compton scatterings with the photons of the microwave cosmic background, producing emission in the GeV band. The spectrum and the flux level of this reprocessed emission is critically dependent on the intensity of the intergalactic magnetic field, B, that can deflect the pairs diluting the intrinsic emission over a large solid angle. We derive a simple relation for the reprocessed spectrum expected from a steady source. We apply this treatment to the blazar 1ES 0229+200, whose intrinsic very hard TeV spectrum is expected to be approximately steady. Comparing the predicted reprocessed emission with the upper limits measured by the Fermi/Large Area Telescope, we constrain the value of the intergalactic magnetic field to be larger than $B \simeq 5\times 10^{-15}$ Gauss, depending on the model of extragalactic background light.
description: 5 pages 2 figures, revised version accepted for publication in MNRAS (Letters)
UFSC activities, results and plans – WP2 'Mapping Atlantic Ecosystems'
Creators: name: Lindner, Alberto
Publisher: name: Zenodo
Year: 2021

description: As part of WP2 objectives (map deep and open-ocean ecosystems at basin, regional and local scales), we gathered all records of deep-water corals in iAtlantic Region 11 (Vitória-Trindade Seamount Chain) and the adjacent continental slope available and known to us in the literature. A total of 68 stations from two research programs yielded deep-water corals, in depths up to 1,806 m. Deep-water coral taxa sampled were Stylasteridae (Class Hydrozoa), Scleractinia, Octocorallia and Antipatharia (Class Anthozoa). Most of these stations are in the adjacent continental slope and only 19 are on seamounts or off islands in the seamount chain. Additionally, only 5 of these 19 stations off islands and seamounts were deeper than 200 m. Region 11 thus remains a poorly sampled region for deep-water corals. Due to COVID-19 restrictions, it was not possible to sample this far. However, we gathered deep-water coral samples (particularly octocorals) collected in the outer shelf and slope of Campos Basin (Region 10) in two Petrobras cruises (December 2019 and January 2021), in depths up to 722 m. Preliminary results indicate three species of Paragorgia, two morphotypes of Corallidae, three genera in the subfamily Anthomastinae and morphotypes of Plexauridae (e.g., Paramuricea). Images and additional samples will be collected during the BR10 cruise to Region 10 and the BR11 cruise to Region 11, postponed due to the COVID-19 restrictions and rescheduled for 2022. These samples will also be used in the Taxonomy Workshop (WP6) and some will be selected and provided for geochemical analyses at USP (WP3).
title: Ð¡Ð¾ÑÐ¸Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ°ÐºÑÐ¾ÑÐ¾Ð², Ð²Ð»Ð¸ÑÑÑÐ¸Ñ Ð½Ð° ÑÐµÑÐµÐ½Ð¸Ðµ Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»Ñ Ð¿ÑÐ¸ Ð²ÑÐ±Ð¾ÑÐµ Ð¾Ð±ÑÐµÐºÑÐ° Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÐ¸ (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐºÐ»Ð¸ÐµÐ½ÑÐ¾Ð² ÐÐÐ Â«Ð ÐÐ¡Ð¡ÐÐ ÐÐ¤Â»)
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Sociological analysis of influencing factors on a customer's decision when choosing a real estate object (by the example of the client of LLC Â«RASSPROFÂ»)
Creators: name: ÐÐ°ÑÐºÐ°ÑÐ¾Ð²Ð°, ÐÐ°ÑÐ°Ð»ÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÑ
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description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð²ÑÐ´ÐµÐ»ÐµÐ½Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ Ð¸ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐ¾ÑÑÐ°Ð²Ð»ÑÑÑÐ¸Ðµ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÐµÐ¹, ÑÐ¾ÑÐ¸Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾Ð´ÑÐ¾Ð´Ñ Ðº Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÐµÐ¹, ÑÐ¾ÑÐ¸Ð°Ð»ÑÐ½Ð¾-Ð¿ÑÐ¸ÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÑÑÐºÐ¸Ñ Ð°ÑÑÐ¾ÑÐ¸Ð°ÑÐ¸Ð¹ Ð¸ Ð¿ÑÐµÐ´Ð¿Ð¾ÑÑÐµÐ½Ð¸Ð¹. ÐÐ·ÑÑÐµÐ½Ñ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ Ð¿Ð¾ÑÑÐµÐ±Ð¸ÑÐµÐ»ÐµÐ¹ Ð¿ÑÐ¸ Ð²ÑÐ±Ð¾ÑÐµ Ð¾Ð±ÑÐµÐºÑÐ° Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÐ¸. ÐÑÑÐ²Ð»ÐµÐ½Ñ ÑÑÑÐ½Ð¾ÑÑÑ, ÑÑÐ½ÐºÑÐ¸Ð¸, ÑÑÑÑÐºÑÑÑÐ½ÑÐµ ÑÐ»ÐµÐ¼ÐµÐ½ÑÑ ÐÐÐ Â«Ð ÐÐ¡Ð¡ÐÐ ÐÐ¤Â», Ð¼ÐµÑÑÐ¾ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ Ð½Ð° ÑÑÐ½ÐºÐµ Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÐ¸ Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³Ð°. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ¾ÑÐ¸Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð²ÑÑÐ²Ð»ÐµÐ½Ñ Ð³ÑÑÐ¿Ð¿Ñ ÑÐµÐ»ÐµÐ²Ð¾Ð¹ Ð°ÑÐ´Ð¸ÑÐ¾ÑÐ¸Ð¸ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ Ð¸ ÑÐ°ÐºÑÐ¾ÑÑ, Ð²Ð»Ð¸ÑÑÑÐ¸Ðµ Ð½Ð° Ð²ÑÐ±Ð¾Ñ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ ÐÐÐ Â«Ð ÐÐ¡Ð¡ÐÐ ÐÐ¤Â». ÐÐ°Ð½Ñ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ ÑÐ°Ð±Ð¾ÑÐµ Ñ ÑÐµÐ»ÐµÐ²Ð¾Ð¹ Ð°ÑÐ´Ð¸ÑÐ¾ÑÐ¸ÐµÐ¹ Ð¿ÑÐ¸ Ð²ÑÐ±Ð¾ÑÐµ Ð¾Ð±ÑÐµÐºÑÐ° Ð½ÐµÐ´Ð²Ð¸Ð¶Ð¸Ð¼Ð¾ÑÑÐ¸.
description: In this paper, the characteristics and main components of consumer behavior, sociological approaches to the definition of consumer behavior, social and psychological aspects of consumer associations and preferences are highlighted. Studied consumer behavior when choosing a property. The essence, functions, structural elements of LLC Â«RASSPROFÂ», the company's place in the real estate market of St. Petersburg are revealed. Based on a sociological analysis, groups of the company's target audience and factors influencing the choice of the company Â«RASSPROFÂ» were identified. Recommendations on working with the target audience when choosing a property are given.
Thermal fluctuation field for current-induced domain wall motion
Creators: name: Kim, Kyoung-Whan
name: Lee, Hyun-Woo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Current-induced domain wall motion in magnetic nanowires is affected by thermal fluctuation. In order to account for this effect, the Landau-Lifshitz-Gilbert equation includes a thermal fluctuation field and literature often utilizes the fluctuation-dissipation theorem to characterize statistical properties of the thermal fluctuation field. However, the theorem is not applicable to the system under finite current since it is not in equilibrium. To examine the effect of finite current on the thermal fluctuation, we adopt the influence functional formalism developed by Feynman and Vernon, which is known to be a useful tool to analyze effects of dissipation and thermal fluctuation. For this purpose, we construct a quantum mechanical effective Hamiltonian describing current-induced domain wall motion by generalizing the Caldeira-Leggett description of quantum dissipation. We find that even for the current-induced domain wall motion, the statistical properties of the thermal noise is still described by the fluctuation-dissipation theorem if the current density is sufficiently lower than the intrinsic critical current density and thus the domain wall tilting angle is sufficiently lower than pi/4. The relation between our result and a recent result, which also addresses the thermal fluctuation, is discussed. We also find interesting physical meanings of the Gilbert damping alpha and the nonadiabaticy parameter beta; while alpha characterizes the coupling strength between the magnetization dynamics (the domain wall motion in this paper) and the thermal reservoir (or environment), beta characterizes the coupling strength between the spin current and the thermal reservoir.
description: 16 page, no figure
Dispersion relations for $B^- \to \ell^- \barν_\ell \ell^{\prime-} \ell^{\prime+}$ form factors
Creators: name: Kürten, Stephan
name: Zanke, Marvin
name: Kubis, Bastian
name: van Dyk, Danny
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: Using dispersive methods, we study the $B \to γ^*$ form factors underlying the decay $B^- \to \ell^- \barν_\ell \ell^{\prime-} \ell^{\prime+}$. We discuss the ambiguity that arises from a separation of the full $B^- \to \ell^- \barν_\ell \ell^{\prime-} \ell^{\prime+}$ amplitude into a hadronic tensor and a final-state-radiation piece, including effects from nonvanishing lepton masses. For the eligibility of a dispersive treatment, we propose a decomposition of the hadronic part that leads to four form factors that are free of kinematic singularities. By establishing a set of dispersion relations, we then relate the $B \to γ^*$ form factors to the well-known $B \to V$, $V=ω(782),ρ(770)$, analogues. Using the combination of a series expansion in a conformal variable and a vector-meson-dominance ansatz to parameterize the $B \to γ^*$ form factors, we infer the values of the associated unknown parameters from the available input on $B \to V$. The phenomenological application of our formalism includes the determination of the branching ratios and forward-backward asymmetries of the process $B^- \to \ell^- \barν_\ell \ell^{\prime-} \ell^{\prime+}$ for the two lightest leptons.
description: 23 pages, 6 figures, 5 tables; v2: branching ratios with tau leptons included, version published in Phys. Rev. D
Channel-driven Decentralized Bayesian Federated Learning for Trustworthy Decision Making in D2D Networks
Creators: name: Barbieri, Luca
name: Simeone, Osvaldo
name: Nicoli, Monica
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Bayesian Federated Learning (FL) offers a principled framework to account for the uncertainty caused by limitations in the data available at the nodes implementing collaborative training. In Bayesian FL, nodes exchange information about local posterior distributions over the model parameters space. This paper focuses on Bayesian FL implemented in a device-to-device (D2D) network via Decentralized Stochastic Gradient Langevin Dynamics (DSGLD), a recently introduced gradient-based Markov Chain Monte Carlo (MCMC) method. Based on the observation that DSGLD applies random Gaussian perturbations of model parameters, we propose to leverage channel noise on the D2D links as a mechanism for MCMC sampling. The proposed approach is compared against a conventional implementation of frequentist FL based on compression and digital transmission, highlighting advantages and limitations.
description: submitted
Optimal impact strategies for asteroid deflection
Creators: name: Vasile, Massimiliano
name: Colombo, Camilla
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optimization and Control (math.OC)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents an analysis of optimal impact strategies to deflect potentially dangerous asteroids. To compute the increase in the minimum orbit intersection distance of the asteroid due to an impact with a spacecraft, simple analytical formulas are derived from proximal motion equations. The proposed analytical formulation allows for an analysis of the optimal direction of the deviating impulse transferred to the asteroid. This ideal optimal direction cannot be achieved for every asteroid at any time; therefore, an analysis of the optimal launch opportunities for deviating a number of selected asteroids was performed through the use of a global optimization procedure. The results in this paper demonstrate that the proximal motion formulation has very good accuracy in predicting the actual deviation and can be used with any deviation method because it has general validity. Furthermore, the characterization of optimal launch opportunities shows that a significant deviation can be obtained even with a small spacecraft.
Dynamical inference for biological processes through the lens of optimal transport
Creators: name: Zhang, Stephen Yimai
Publisher: name: University of British Columbia
Year: 2021

description: This thesis focuses on inference problems involving stochastic dynamics in biological systems. Many biological processes involve a population of cells that collectively undergo changes in their state over time. Experimental techniques for measuring cellular state are fundamentally limited so that the relationship between the immediate state of a cell and its past or future states cannot be directly observed. Inference techniques must be relied upon to reconstruct information about the evolution of individual cells within a population over time. Herein we discuss optimal transport as a mathematical framework for this kind of estimation problem, and build up methodology for inference in both out-of-equilibrium (non-stationary) and equilibrium (stationary) systems. For motivation, we begin with with a preliminary discussion of the nature of noisy dynamical systems arising in biology. We then turn to an overview of optimal transport theory from a computational viewpoint, which will form the mathematical workhorse of the remainder of this thesis. The first scenario we consider deals with a time-course of statistically independent observations drawn from an evolving population. We set up a inference framework modelling the process as a stochastic dynamical system. We identify and discuss the conditions required for identifiability of the underlying dynamics. Using the tools of optimal transport, we develop Global Waddington-OT, a computational method that can infer dynamics by solution of a convex program. We extensively investigate the performance of our method with simulated datasets, and also show positive results with a real-world biological dataset. The second scenario addresses the setting where observations are made from an evolving population at its equilibrium state. Using the arguments developed in the time-course scenario, we find that the necessary assumptions for identifiability carry over. We formulate a computational method StationaryOT that also estimates dynamics by solving a convex program, and investigate its performance with simulated and biological data.
Autoencoded sparse Bayesian in-IRT factorization, calibration, and amortized inference for the Work Disability Functional Assessment Battery
Creators: name: Chang, Joshua C.
name: Chow, Carson C.
name: Porcino, Julia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The Work Disability Functional Assessment Battery (WD-FAB) is a multidimensional item response theory (IRT) instrument designed for assessing work-related mental and physical function based on responses to an item bank. In prior iterations it was developed using traditional means -- linear factorization and null hypothesis statistical testing for item partitioning/selection, and finally, posthoc calibration of disjoint unidimensional IRT models. As a result, the WD-FAB, like many other IRT instruments, is a posthoc model. Its item partitioning, based on exploratory factor analysis, is blind to the final nonlinear IRT model and is not performed in a manner consistent with goodness of fit to the final model. In this manuscript, we develop a Bayesian hierarchical model for self-consistently performing the following simultaneous tasks: scale factorization, item selection, parameter identification, and response scoring. This method uses sparsity-based shrinkage to obviate the linear factorization and null hypothesis statistical tests that are usually required for developing multidimensional IRT models, so that item partitioning is consistent with the ultimate nonlinear factor model. We also analogize our multidimensional IRT model to probabilistic autoencoders, specifying an encoder function that amortizes the inference of ability parameters from item responses. The encoder function is equivalent to the "VBE" step in a stochastic variational Bayesian expectation maximization (VBEM) procedure that we use for approxiamte Bayesian inference on the entire model. We use the method on a sample of WD-FAB item responses and compare the resulting item discriminations to those obtained using the traditional posthoc method.
description: Errata corrected relative to camera-ready AISTATS version. Please use this file
A Core-Collapse Supernova Model for the Extremely Luminous Type Ic Supernova 2007bi: An Alternative to the Pair-Instability Supernova Model
Creators: name: Moriya, Takashi
name: Tominaga, Nozomu
name: Tanaka, Masaomi
name: Maeda, Keiichi
name: Nomoto, Ken'ichi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a core-collapse supernova model for the extremely luminous Type Ic supernova 2007bi. By performing numerical calculations of hydrodynamics, nucleosynthesis, and radiation transport, we find that SN 2007bi is consistent with the core-collapse supernova explosion of a 43 Msun carbon and oxygen core obtained from the evolution of a progenitor star with a main sequence mass of 100 Msun and metallicity of Z = Zsun/200, from which its hydrogen and helium envelopes are artificially stripped. The ejecta mass and the ejecta kinetic energy of the models are 40 Msun and 3.6*10^{52} erg. The ejected 56Ni mass is as large as 6.1 Msun, which results from the explosive nucleosynthesis with large explosion energy. We also confirm that SN 2007bi is consistent with a pair-instability supernova model as has recently been claimed. We show that the earlier light curve data can discriminate between the models for such luminous supernovae.
description: 4 pages, 3 figures, 1 table, accepted by The Astrophysical Journal Letters
title: ÐÐµÐ¶ÐºÑÐ»ÑÑÑÑÐ½ÑÐµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð´Ð¸ÑÐºÑÑÑÐ° (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ Ð²ÑÑÑÑÐ¿Ð»ÐµÐ½Ð¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÐºÐ¾Ð² Ð Ð¾ÑÑÐ¸Ð¸ Ð¸ Ð¡Ð¨Ð)
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Cross-Cultural Peculiarities of Political Discourse (on the Example of Performances of Russian and American Politicians)
Creators: name: ÐÐ¾Ð½Ð¾Ð½Ð¾Ð²Ð°, Ð¢Ð°ÑÑÑÐ½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð´Ð¸ÑÐºÑÑÑ
Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ Ð´Ð¸ÑÐºÑÑÑ
Ð³Ð»Ð¾Ð±Ð°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ
Ð¼Ð°Ð½Ð¸Ð¿ÑÐ»ÑÑÐ¸Ð²Ð½ÑÐµ ÑÐ°ÐºÑÐ¸ÐºÐ¸
Ð¸Ð½ÑÐµÑÑÐµÐºÑÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ
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Ð²ÑÑÐ¾ÐºÐ¾ÐºÐ¾Ð½ÑÐµÐºÑÑÐ½Ð°Ñ ÐºÑÐ»ÑÑÑÑÐ°
Ð½Ð¸Ð·ÐºÐ¾ÐºÐ¾Ð½ÑÐµÐºÑÑÐ½Ð°Ñ ÐºÑÐ»ÑÑÑÑÐ°
discourse
political discourse
globalization
manipulative tactics
intertextuality
metaphor
precedence
high-context culture
low-context culture

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´ÑÐµÑÑÑ Ð²Ð¾Ð¿ÑÐ¾Ñ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð´Ð¸ÑÐºÑÑÑÐ° Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð²ÑÑÑÑÐ¿Ð»ÐµÐ½Ð¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÐºÐ¾Ð² Ð Ð¾ÑÑÐ¸Ð¸ Ð¸ Ð¡Ð¨Ð. Ð¡ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸ÐµÐ¼ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð±Ð°Ð·Ñ, Ð² ÐºÐ¾ÑÐ¾ÑÐ¾Ð¹ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°Ð»Ð¸ÑÑ ÑÑÐ½ÐºÑÐ¸Ð¸, ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ñ Ð¸ Ð»Ð¸Ð½Ð³Ð²Ð¸ÑÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð´Ð¸ÑÐºÑÑÑÐ°, Ð±ÑÐ» Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ ÑÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð²ÑÑÑÑÐ¿Ð»ÐµÐ½Ð¸Ð¹ ÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ¸Ñ Ð¸ Ð°Ð¼ÐµÑÐ¸ÐºÐ°Ð½ÑÐºÐ¸Ñ Ð¿Ð¾Ð»Ð¸ÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð»Ð¸Ð´ÐµÑÐ¾Ð².
description: In this bachelorâs thesis, the issue of political discourse is examined within the framework of speeches by politicians from Russia and the USA. Using the theoretical base, in which the functions, classification and linguistic features of political discourse were considered, a comparative analysis of the speeches of Russian and American political leaders was carried out.
Stein fillable Seifert fibered 3-manifolds
Creators: name: Lecuona, Ana G.
name: Lisca, Paolo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17, 53D10

description: We characterize the closed, oriented, Seifert fibered 3-manifolds which are oriented boundaries of Stein manifolds. We also show that for this class of 3-manifolds the existence of Stein fillings is equivalent to the existence of symplectic fillings.
description: 18 pages, 6 figures; added one reference
Multitask Detection of Speaker Changes, Overlapping Speech and Voice Activity Using wav2vec 2.0
Creators: name: Kunešová, Marie
name: Zajíc, Zbyněk
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Self-supervised learning approaches have lately achieved great success on a broad spectrum of machine learning problems. In the field of speech processing, one of the most successful recent self-supervised models is wav2vec 2.0. In this paper, we explore the effectiveness of this model on three basic speech classification tasks: speaker change detection, overlapped speech detection, and voice activity detection. First, we concentrate on only one task -- speaker change detection -- where our proposed system surpasses the previously reported results on four different corpora, and achieves comparable performance even when trained on out-of-domain data from an artificially designed dataset. Then we expand our approach to tackle all three tasks in a single multitask system with state-of-the-art performance on the AMI corpus. The implementation of the algorithms in this paper is publicly available at https://github.com/mkunes/w2v2_audioFrameClassification.
description: To appear at ICASSP 2023
Switchable metamaterial reflector/absorber for different polarized electromagnetic waves
Creators: name: Zhu, Bo
name: Feng, Yijun
name: Zhao, Juming
name: Huang, Ci
name: Jiang, Tian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a controllable electromagnetic wave reflector/absorber for different polarizations with metamaterial involving electromagnetic resonant structures coupled with diodes. Through biasing at different voltages to turn ON and OFF the diodes, we are able to switch the structure between nearly total reflection and total absorption of a particularly polarized incident wave. By arranging orthogonally orientated resonant cells, the metamaterial can react to different polarized waves by selectively biasing the corresponding diodes. Both numerical simulations and microwave measurements have verified the performance.
description: 11 pages, 4 figures
Articulation GAN: Unsupervised modeling of articulatory learning
Creators: name: Beguš, Gašper
name: Zhou, Alan
name: Wu, Peter
name: Anumanchipalli, Gopala K
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Generative deep neural networks are widely used for speech synthesis, but most existing models directly generate waveforms or spectral outputs. Humans, however, produce speech by controlling articulators, which results in the production of speech sounds through physical properties of sound propagation. We introduce the Articulatory Generator to the Generative Adversarial Network paradigm, a new unsupervised generative model of speech production/synthesis. The Articulatory Generator more closely mimics human speech production by learning to generate articulatory representations (electromagnetic articulography or EMA) in a fully unsupervised manner. A separate pre-trained physical model (ema2wav) then transforms the generated EMA representations to speech waveforms, which get sent to the Discriminator for evaluation. Articulatory analysis suggests that the network learns to control articulators in a similar manner to humans during speech production. Acoustic analysis of the outputs suggests that the network learns to generate words that are both present and absent in the training distribution. We additionally discuss implications of articulatory representations for cognitive models of human language and speech technology in general.
description: ICASSP 2023
BEBERT: Efficient and Robust Binary Ensemble BERT
Creators: name: Tian, Jiayi
name: Fang, Chao
name: Wang, Haonan
name: Wang, Zhongfeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Pre-trained BERT models have achieved impressive accuracy on natural language processing (NLP) tasks. However, their excessive amount of parameters hinders them from efficient deployment on edge devices. Binarization of the BERT models can significantly alleviate this issue but comes with a severe accuracy drop compared with their full-precision counterparts. In this paper, we propose an efficient and robust binary ensemble BERT (BEBERT) to bridge the accuracy gap. To the best of our knowledge, this is the first work employing ensemble techniques on binary BERTs, yielding BEBERT, which achieves superior accuracy while retaining computational efficiency. Furthermore, we remove the knowledge distillation procedures during ensemble to speed up the training process without compromising accuracy. Experimental results on the GLUE benchmark show that the proposed BEBERT significantly outperforms the existing binary BERT models in accuracy and robustness with a 2x speedup on training time. Moreover, our BEBERT has only a negligible accuracy loss of 0.3% compared to the full-precision baseline while saving 15x and 13x in FLOPs and model size, respectively. In addition, BEBERT also outperforms other compressed BERTs in accuracy by up to 6.7%.
description: To appear in 2023 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2023)