cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Determination of the Dzyaloshinskii-Moriya interaction using pattern recognition and machine learning
Creators: name: Kawaguchi, Masashi
name: Tanabe, Kenji
name: Yamada, Keisuke
name: Sawa, Takuya
name: Hasegawa, Shun
name: Hayashi, Masamitsu
name: Nakatani, Yoshinobu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Machine learning is applied to a large number of modern devices that are essential in building energy efficient smart society. Audio and face recognition are among the most well-known technologies that make use of such artificial intelligence. In materials research, machine learning is adapted to predict materials with certain functionalities, an approach often referred to as materials informatics. Here we show that machine learning can be used to extract material parameters from a single image obtained in experiments. The Dzyaloshinskii-Moriya (DM) interaction and the magnetic anisotropy distribution of thin film heterostructures, parameters that are critical in developing next generation storage class magnetic memory technologies, are estimated from a magnetic domain image. Micromagnetic simulation is used to generate thousands of random images for training and model validation. A convolutional neural network system is employed as the learning tool. The DM exchange constant of typical Co-based thin film heterostructures is studied using the trained system: the estimated values are in good agreement with experiments. Moreover, we show that the system can independently determine the magnetic anisotropy distribution, demonstrating the potential of pattern recognition. This approach can considerably simplify experimental processes and broaden the scope of materials research.
Longitudinal Spin Transfer to the $Λ$ Hyperon in Semi-Inclusive Deep-Inelastic Scattering
Creators: name: Hermes Collaboration
name: Airapetian, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The transfer of polarization from a high-energy positron to a \lam hyperon produced in semi-inclusive deep-inelastic scattering has been measured. The data have been obtained by the HERMES experiment at DESY using the 27.6 GeV longitudinally polarized positron beam of the HERA collider and unpolarized gas targets internal to the positron (electron) storage ring. The longitudinal spin transfer coefficient is found to be $\dll = 0.11 \pm 0.10 \mathrm{(stat)} \pm 0.03 \mathrm{(syst)}$ at an average fractional energy carried by the \lam hyperon $= 0.45$. The dependence of \dll on both the fractional energy $z$ and the fractional longitudinal momentum $x_F$ is presented.
Active-sterile neutrino mixing in the absence of bare active neutrino mass
Creators: name: Liao, Yi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate a minimal extension of the standard model in which the only new ingredient is the sterile neutrinos. We do not introduce extra Higgs multiplets or high dimensional effective operators to induce mass terms for the active neutrinos, and the model is renormalizable in itself. We show for arbitrary numbers of generations and sterile neutrinos that the independent physical parameters in the leptonic sector are much less than previously anticipated. For instance, with three active and two sterile neutrinos, there are four mixing angles and three CP phases in addition to four non-vanishing neutrino masses. We study phenomenological implications for tritium beta decay, neutrinoless double beta decay and neutrino oscillations. For the most natural see-saw parameters, we find that it is difficult to accommodate in the model the best-fit values of masses and mixing parameters from oscillation data no matter whether we include or not the null short-baseline experiments together with the LSND result. This implies that if the LSND result is confirmed by MiniBooNE, the see-saw parameter region of the model with two sterile neutrinos could be largely excluded.
description: 21 pages, no figures, 2 tables; v2: added the last two refs in item [17], to appear in NPB
Rayleigh imaging in spectral mammography
Creators: name: Berggren, Karl
name: Danielsson, Mats
name: Fredenberg, Erik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Spectral imaging is the acquisition of multiple images of an object at different energy spectra. In mammography, dual-energy imaging (spectral imaging with two energy levels) has been investigated for several applications, in particular material decomposition, which allows for quantitative analysis of breast composition and quantitative contrast-enhanced imaging. Material decomposition with dual-energy imaging is based on the assumption that there are two dominant photon interaction effects that determine linear attenuation: the photoelectric effect and Compton scattering. This assumption limits the number of basis materials, i.e. the number of materials that are possible to differentiate between, to two. However, Rayleigh scattering may account for more than 10% of the linear attenuation in the mammography energy range. In this work, we show that a modified version of a scanning multi-slit spectral photon-counting mammography system is able to acquire three images at different spectra and can be used for triple-energy imaging. We further show that triple-energy imaging in combination with the efficient scatter rejection of the system enables measurement of Rayleigh scattering, which adds an additional energy dependency to the linear attenuation and enables material decomposition with three basis materials. Three available basis materials have the potential to improve virtually all applications of spectral imaging.
Hierarchy of higher-order topological superconductors in three dimensions
Creators: name: Ghosh, Arnob Kumar
name: Nag, Tanay
name: Saha, Arijit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: After exploring much on two-dimensional higher-order topological superconductors (HOTSCs) hosting Majorana corner modes (MCMs) only, we propose a simple fermionic model based on a three-dimensional topological insulator proximized with $s$-wave superconductor to realize Majorana hinge modes (MHMs) followed by MCMs under the application of appropriate Wilson-Dirac perturbations. We interestingly find that the second-order topological superconductor, hosting MHMs, appears above a threshold value of the first type perturbation while the third-order topological superconducting phase, supporting MCMs, immediately arises incorporating infinitesimal perturbation of the second kind. Thus, a hierarchy of HOTSC phases can be realized in a single three-dimensional model. Additionally, the application of bulk magnetic field is found to be instrumental in manipulating the number of MHMs, leaving the number for MCMs unaltered. We analytically understand these above-mentioned numerical findings by resorting to the low energy model. We further characterize these topological phases with a distinct structure of the Wannier spectra. From the practical point of view, we manifest quantized transport signatures of these higher-order modes. Finally, we construct Floquet engineering to generate the hierarchy of HOTSC phases by kicking the same perturbations as considered in their static counterpart.
description: This is the published version
Efficiency of the centrifugally induced curvature drift instability in AGN winds
Creators: name: Osmanov, Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: For studying how the field lines are twisting nearby the light cylinder surface, which provides the free motion of AGN winds through the mentioned area, the investigation of the centrifugally driven curvature drift instability is presented. Studying the dynamics of the relativistic MHD flow close to the light cylinder surface, by applying a single particle approach based on the centrifugal acceleration, the dispersion relation of the instability is derived and analytically solved. Considering the typical values of AGN winds, it is shown that the time scale of the curvature drift instability is much less than the accretion process time scale, indicating that the present instability is very efficient and might strongly influence processes in AGN plasmas.
description: 7 pages, 7 figures
Lesion characterization in spectral photon-counting tomosynthesis
Creators: name: Cederstrom, Bjorn
name: Fredenberg, Erik
name: Berggren, Karl
name: Erhard, Klaus
name: Danielsson, Mats
name: Wallis, Matthew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: It has previously been shown that 2D spectral mammography can be used to discriminate between (likely benign) cystic and (potentially malignant) solid lesions in order to reduce unnecessary recalls in mammography. One limitation of the technique is, however, that the composition of overlapping tissue needs to be interpolated from a region surrounding the lesion. The purpose of this investigation was to demonstrate that lesion characterization can be done with spectral tomosynthesis, and to investigate whether the 3D information available in tomosynthesis can reduce the uncertainty from the interpolation of surrounding tissue. A phantom experiment was designed to simulate a cyst and a tumor, where the tumor was overlaid with a structure that made it mimic a cyst. In 2D, the two targets appeared similar in composition, whereas spectral tomosynthesis revealed the exact compositional difference. However, the loss of discrimination signal due to spread from the plane of interest was of the same strength as the reduction of anatomical noise. Results from a preliminary investigation on clinical tomosynthesis images of solid lesions yielded results that were consistent with the phantom experiments, but were still to some extent inconclusive. We conclude that lesion characterization is feasible in spectral tomosynthesis, but more data, as well as refinement of the calibration and discrimination algorithms, are needed to draw final conclusions about the benefit compared to 2D.
BRST approach to Lagrangian construction for fermionic higher spin fields in AdS space
Creators: name: Buchbinder, I. L.
name: Krykhtin, V. A.
name: Reshetnyak, A. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a general gauge invariant Lagrangian construction for half-integer higher spin fields in the AdS space of any dimension. Starting with formulation in terms of auxiliary Fock space we derive the closed nonlinear symmetry algebras of higher spin fermionic fields in the AdS space and find the corresponding BRST operator. A universal procedure of constructing the gauge invariant Lagrangians describing the dynamics of fermionic fields of any spin is developed. No off-shell constraints for the fields and gauge parameters are imposed from the very beginning. It is shown that all the constraints determining the irreducible representation of the AdS group arise as a consequence of the equations of motion and gauge transformations. As an example of the general procedure, we derive the gauge invariant Lagrangians for massive fermionic fields of spin 1/2 and 3/2 containing the total set of auxiliary fields and gauge symmetries.
description: Minor changes. Version accepted for publication in NPB
Determining the antiproton magnetic moment from measurements of the hyperfine structure of antiprotonic helium
Creators: name: Bakalov, Dimitar
name: Widmann, Eberhard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Recent progress in the spectroscopy of antiprotonic helium has allowed for measuring the separation between components of the hyperfine structure (HFS) of the (37,35) metastable states with an accuracy of 300 MHz, equivalent to a relative accuracy of 3x10^{-5}. The analysis of the uncertainties of the available theoretical results on the antiprotonic helium HFS shows that the accuracy of the value of the dipole magnetic moment of the antiproton (currently known to only 0.3 %) may be improved by up to 2 orders of magnitude by measuring the splitting of appropriately selected components of the HFS of any of the known metastable states. The feasibility of the proposed measurement by means of an analog of the triple resonance method is also discussed.
description: Phys. Rev. A, in print
Limitation of the modulation method to smooth wire guide roughness
Creators: name: Bouchoule, Isabelle
name: Trebbia, Jean-Baptiste
name: Alzar, Carlos L. Garrido
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: It was recently demonstrated that wire guide roughness can be suppressed by modulating the wire currents so that the atoms experience a time-averaged potential without roughness. We theoretically study the limitations of this technique. At low modulation frequency, we show that the longitudinal potential modulation produces a heating of the cloud and we compute the heating rate. We also give a quantum derivation of the rough conservative potential associated with the micro-motion of the atoms. At large modulation frequency, we compute the loss rate due to non adiabatic spin flip and show it presents resonnances at multiple modulation frequencies. These studies show that the modulation technique works for a wide range of experimental parameters. We also give conditions to realise radio-frequency evaporative cooling in such a modulated trap.
description: 11 pages
Critical dynamics and phase transition of a strongly interacting warm spin-gas
Creators: name: Horowicz, Yahel
name: Katz, Or
name: Raz, Oren
name: Firstenberg, Ofer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Phase transitions are emergent phenomena where microscopic interactions drive a disordered system into a collectively ordered phase. Near the boundary between two phases, the system can exhibit critical, scale-invariant behavior. Here, we report on a second-order phase transition accompanied by critical behavior in a system of warm cesium spins driven by linearly-polarized light. The ordered phase exhibits macroscopic magnetization when the interactions between the spins become dominant. We measure the phase diagram of the system and observe the collective behavior near the phase boundaries, including power-law dependence of the magnetization and divergence of the susceptibility. Out of equilibrium, we observe a critical slow-down of the spin response time by two orders of magnitude, exceeding five seconds near the phase boundary. This work establishes a controlled platform for investigating equilibrium and nonequilibrium properties of magnetic phases.
description: Y.H. and O.K. contributed equally
X-Ray Absorption and an X-Ray Jet in the Radio-Loud Broad Absorption Line Quasar PG 1004+130
Creators: name: Miller, B. P.
name: Brandt, W. N.
name: Gallagher, S. C.
name: Laor, A.
name: Wills, Beverley J.
name: Garmire, G. P.
name: Schneider, D. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the X-ray properties of PG 1004+130, a low-redshift radio-loud broad absorption line (BAL) quasar with a hybrid FR I/FR II radio morphology. The 22.2 ks XMM-Newton and 41.6 ks Chandra observations presented here are the first X-ray detections of PG 1004+130 and constitute the highest spectral quality X-ray observations of a radio-loud BAL quasar available to date. The Chandra ACIS-S spectrum shows evidence for complex soft X-ray absorption not detected in the data obtained 1.7 yr previously with XMM-Newton, with a best-fit intrinsic column density of N_H=1.2e22 cm-2 for the preferred partial-covering model. There is no significant difference in the hard-band power-law photon index of ~1.5 between the two observations. The Chandra image also reveals extended X-ray emission ~8'' (30 kpc) south-east of the nucleus, aligned with the FR I jet but upstream of the 1.4 GHz radio-brightness peak. The jet is not detected by HST, and the optical upper limit rules out a simple single-component synchrotron interpretation of the radio-to-X-ray emission. The multiwavelength characteristics of the PG 1004+130 jet, including its relatively flat X-ray power law and concave spectral energy distribution, are similar to those of powerful FR II jets. The lack of strong beaming in PG 1004+130 limits the efficiency of inverse Compton upscattering, and we consider the X-ray emission to most likely arise from a second synchrotron component generated by highly energetic electrons.
description: 33 pages, 5 figures (1 color), accepted by ApJ
Replica wormholes and capacity of entanglement
Creators: name: Kawabata, Kohki
name: Nishioka, Tatsuma
name: Okuyama, Yoshitaka
name: Watanabe, Kento
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the capacity of entanglement as a probe of the Hawking radiation in a two-dimensional dilaton gravity coupled with conformal matter of large degrees of freedom. A formula calculating the capacity is derived using the gravitational path integral, from which we speculate that the capacity has a discontinuity at the Page time in contrast to the continuous behavior of the generalized entropy. We apply the formula to a replica wormhole solution in an eternal AdS black hole coupled to a flat non-gravitating bath and show that the capacity of entanglement is saturated by the thermal capacity of the black hole in the high temperature limit.
description: 40 pages, 7 figures; v2: minor clarifications, references added; v3: typos corrected, a table added, published version
Consequences of modernisation in Botswana : lessons and alternatives for the livestock sector
Creators: name: Keatimilwe, Kagiso P.
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this thesis is to analyse the effects of post-independence modernisation policies within the cattle sector in Botswana and to suggest alternative ways of dealing with the challenge of development. The study pursues four research objectives which are: 1. to examine the environmental effects of cattle production by discussing the impacts of policies on disease control as well as changes in rangeland condition; 2. to discuss the social impacts of the modernisation approach to development by examining data on the distribution of cattle, the financial returns that accrue to owners, and the level of subsidies which the sector receives from the government; 3. to determine the degree of vulnerability of the Botswana cattle sector to decisions made outside the country by investigating the influence of the EEC and certain environmental groups on the beef industry. 4. to suggest a set of principles aimed at making development more ecologically sensitive, more beneficial to most people, and more self-reliant in terms of economic and political decisions. Modernisation theory according to Hirschman and Rostow contends that inter-dependence with capitalist economies is a prerequisite for development (primarily defined as economic growth and not addressing environmental issues); that the accumulation of wealth will lead to the reduction of poverty; and that all countries can benefit from the development process. By contrast, Dependency theory according to authors including Prebisch, Frank, Amin, and Sunkel has argued that inter-dependence with capitalist economies retards development; that the national accumulation of wealth does not lead to improved living conditions for much of the population; and that there is little prospect for economic growth in the peripheral countries. The analysis of policies and measures adopted by the Botswana government involving land reform, disease control, pricing and marketing policies and the use of subsidies reveals that economic growth and access to markets have been attained at the expense of both environmental quality and equity. Future policy for the livestock sector cannot ignore criticism of these impacts without jeopardising the beef trade which has largely been determined by the EEC. This European Community influence raises questions about the extent to which Botswana is in control of her development policy. Drawing largely from the work of Gardner, the thesis addresses the above concerns by suggesting a set of policy guidelines which identify both the ends and means of decision-making. This framework recognises that the goals of development must include ecological sustainability and economic and political self-reliance in addition to material benefits. Although it recognises the magnitude of the development problems, the thesis concludes by suggesting specific issues which should be investigated to improve living conditions in the country.
Proposal of highly sensitive optofluidic sensors based on dispersive photonic crystal waveguides
Creators: name: Xiao, Sanshui
name: Mortensen, Niels Asger
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optofluidic sensors based on highly dispersive two-dimensional photonic crystal waveguides are theoretically studied. Results show that these structures are strongly sensitive to the refractive index of the infiltrated liquid (nl), which is used to tune dispersion of the photonic crystal waveguide. Waveguide mode-gap edge shifts about 1.2 nm for dnl=0.002. The shifts can be explained well by band structure theory combined with first-order perturbation theory. These devices are potentially interesting for chemical sensing applications.
description: 8 pages including 3 figures. Accepted for proceedings of Nanometa to appear in J. Opt. A: Pure Appl. Opt
Fractional Generalization of Gradient Systems
Creators: name: Tarasov, Vasily E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Chemical Physics (physics.chem-ph)
subject: Classical Physics (physics.class-ph)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: We consider a fractional generalization of gradient systems. We use differential forms and exterior derivatives of fractional orders. Examples of fractional gradient systems are considered. We describe the stationary states of these systems.
description: 11 pages, LaTeX
checkMyIndex: a web-based R/Shiny interface for choosing compatible sequencing indexes
Creators: name: Varet, Hugo
name: Jean-Yves Coppée
name: Cokelaer, Thomas
Publisher: name: F1000 Research Limited
Year: 2019

description: When sequencing several libraries simultaneously, the selection of compatible combinations of indexes is critical for ensuring that the sequencer will be able to decipher the short, sample-specific barcodes added to each fragment. However, researchers have few tools to help them choose optimal indexes. Here, we present checkMyIndex, an online R/Shiny application that facilitates the selection of the right indexes as a function of the experimental constraints.
Superconductivity of centrosymmetric and non-centrosymmetric phases in antiperovskite (Ca,Sr)Pd$_3$P
Creators: name: Iyo, Akira
name: Hase, Izumi
name: Fujihisa, Hiroshi
name: Gotoh, Yoshito
name: Takeshita, Nao
name: Ishida, Shigeyuki
name: Ninomiya, Hiroki
name: Yoshida, Yoshiyuki
name: Eisaki, Hiroshi
name: Hirose, Hishiro T.
name: Terashima, Taichi
name: Kawashima, Kenji
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the recently discovered antiperovskite phosphide (Ca,Sr)Pd$_3$P, centrosymmetric (CS) and non-centrosymmetric (NCS) superconducting phases appear depending on the Sr concentration, and their transition temperatures ($T_\mathrm{c}$) differ by as much as one order of magnitude. In this study, we investigated the superconducting properties and electronic band structures of CS orthorhombic (CSo) (Ca$_{0.6}$Sr$_{0.4}$)Pd$_3$P ($T_\mathrm{c}$ = 3.5 K) and NCS tetragonal (NCSt) (Ca$_{0.25}$Sr$_{0.75}$)Pd$_3$P ($T_\mathrm{c}$ = 0.32 K) samples with a focus on explaining their large $T_\mathrm{c}$ difference. Specific heat measurements indicated that CSo (Ca$_{0.6}$Sr$_{0.4}$)Pd$_3$P was an s-wave superconductor in a moderate-coupling regime with a 2$Δ$$_0$/k$_B$$T_\mathrm{c}$ value of 4.0. Low-lying phonons leading to the strong coupling in the structurally analogous SrPt$_3$P were unlikely to be present in CSo (Ca$_{0.6}$Sr$_{0.4}$)Pd$_3$P. Given that CSo (Ca$_{0.6}$Sr$_{0.4}$)Pd$_3$P and NCSt (Ca$_{0.25}$Sr$_{0.75}$)Pd$_3$P exhibited similar Debye temperatures ($Θ$$_D$) of approximately 200 K, the large $T_\mathrm{c}$ difference could not be attributed to $Θ$$_D$.$T_\mathrm{c}$ of each phase was accurately reproduced based on the Bardeen-Cooper-Schrieffer (BCS) theory using experimental data and the density of states of the Fermi level $N$(0) calculated from their band structures. We concluded that the considerable suppression of $T_\mathrm{c}$ in NCSt (Ca$_{0.25}$Sr$_{0.75}$)Pd$_3$P can be primarily attributed to the decrease in $N$(0) associated with the structural phase transition without considering the lack of inversion symmetry.
description: 14 pages, 8 figures,
Membuka Jalan Menuju Indeksasi Scopus: Panduan untuk Editor dan Penerbit
Creators: name: Busro, Busro
Publisher: name: Zenodo
Year: 2023

description: Slide ini, berjudul "Membuka Jalan Menuju Indeksasi Scopus: Panduan untuk Editor dan Penerbit," adalah panduan singkat yang memberikan wawasan kepada editor dan penerbit mengenai langkah-langkah kunci untuk mencapai indeksasi dalam Scopus. Slide ini merangkum strategi dan prosedur yang diperlukan untuk memastikan kesuksesan dalam proses evaluasi Scopus, termasuk bagaimana mengelola tinjauan, mengatasi penolakan, dan, jika perlu, melibatkan prosedur banding. Slide ini bertujuan memberikan pemahaman yang jelas tentang langkah-langkah yang dapat diambil untuk meningkatkan peluang kesuksesan dalam memasukkan jurnal ke dalam indeks prestisius Scopus.
Large-to-small scale frequency modulation analysis in wall-bounded turbulence via visibility networks
Creators: name: Iacobello, Giovanni
name: Ridolfi, Luca
name: Scarsoglio, Stefania
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Scale interaction is studied in wall-bounded turbulence by focusing on the frequency modulation (FM) mechanism of large scales on small scale velocity fluctuations. Differently from amplitude modulation analysis, frequency modulation has been less investigated also due to the difficulty to develop robust tools for broadband signals. To face this issue, the natural visibility graph approach is proposed in this work to map the full velocity signals into complex networks. We show that the network degree centrality is able to capture the signal structure at local scales directly from the full signal, thereby quantifying FM. Velocity signals from numerically-simulated turbulent channel flows and an experimental turbulent boundary layer are investigated at different Reynolds numbers. A correction of Taylor's hypothesis for time-series is proposed to overcome the overprediction of near-wall frequency modulation obtained when local mean velocity is used as the convective velocity. Results provide network-based evidences of the large-to-small FM features for all the three velocity components in the near-wall region, with a reversal mechanism emerging far from the wall. Additionally, scaling arguments in the view of the quasi-steady quasi-homogeneous hypothesis are discussed, and a delay-time between large and small scales very close to the near-wall cycle characteristic time is detected. Results show that the visibility graph is a parameter-free tool that turns out to be effective and robust to detect FM in different configurations of wall-bounded turbulent flows. Based on present findings, the visibility network-based approach can represent a reliable tool to systematically investigate scale interaction mechanisms in wall-bounded turbulence.
Excellent adsorption performance of dibenzothiophene on functionalized low-cost activated carbons with different oxidation methods
Creators: name: Yu, Zhan
name: Wang, Dan
name: Yang, Yue
name: Meng, Xuan
name: Liu, Naiwang
name: Shi, Li
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Low-cost activated carbon (KAC) was functionalized by HNO3, (NH4)2S2O8 and air oxidation, respectively, to remove dibenzothiophene (DBT) from model fuel. The changes in physical and chemical properties of these activated carbons were characterized by thermal analysis, elemental analysis, nitrogen adsorption apparatus, Raman spectra, scanning electron microscope and Boehm’s titration method. HNO3 and (NH4)2S2O8 oxidation result in a significant decrease in pore structure, while air oxidation only causes slight pore reduction due to the re-activation by O2. The oxygen-containing functional groups (OFGs) increase markedly after oxidative modification, in which (NH4)2S2O8 oxidation is considered as the most efficient method with respect to the introduction of OFGs. HNO3 and (NH4)2S2O8 oxidation are more selective to generate carboxyls and lactones, whereas air oxidation creates more phenols, carbonyls and ethers. The DBT adsorption capacity follows the order: NAC (HNO3-oxidized KAC) > OAC (air-oxidized KAC) > KAC > SAC ((NH4)2S2O8-oxidized KAC), implying the introduction of OFGs is beneficial for the DBT adsorption process, especially for selectivity, but excessive OFGs have a negative effect on the removal of DBT. Thus, to achieve high DBT adsorption performance, there should be a trade-off between the micropore volume and the OFGs amount.
VCF2Table: A VCF prettifier for the command line
Creators: name: Lindenbaum Pierre
name: Karakachoff, Matilde
name: Redon, Richard
Publisher: name: F1000 Research Limited
Year: 2019

description: The Variant Call Format (VCF), is the standard format for storing variants and genotypes. Reading all those details can be laborious, especially when there is a lot of genotypes or when there is a large number of items in the INFO column. To answer the need for easily reading those data, we have written a VCF prettifier named vcf2table. vcf2table takes as input a stream or a VCF. It writes a set of ASCII tables to the standard output or into a file. The output contains the information about the VCF header and the variants. vcf2table is a java program, it uses the 'java library for high throughput sequencing' (htsjdk) library to decode the VCF data, and is part of the 'jvarkit' package
title: Recenzja: "Strategie zawodowych klubów sportowych w Polsce" / Zbigniew Pawlak, Andrzej Smoleń. Warszawa: SGH, 2015. ISBN: 978-83-7378-998-2.
Creators: name: Strachota, Damian
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2021

description: Sport, tak jak każda dziedzina aktywności biznesowej w XXI wieku, podlega dynamicznym zmianom. Głównymi czynnikami mającymi wpływ na jego kondycję są następujące procesy: profesjonalizacja (uzawodowienie sportowców), komercjalizacja (widowiska sportowe jako produkt generujący coraz większe dochody), medializacja (udostępnianie relacji z wydarzeń sportowych poprzez masowe środki przekazu) oraz internacjonalizacja (coraz bardziej swobodny przepływ zawodników i szkoleniowców w kontekście zatrudnienia). W literaturze przedmiotu istnieje relatywnie mało opracowań na temat organizacji zawodowych klubów sportowych w Polsce, co jest zadziwiające, gdy wziąć pod uwagę fakt dużej dynamiki przemian od początku transformacji systemowej, jakie wciąż zachodzą w zarządzaniu strategicznym w polskich klubach. Lukę w powyższej dziedzinie skutecznie wypełnia praca Zbigniewa Pawlaka oraz Andrzeja Smolenia, która przedstawia szeroką panoramę strategii zarządzania, wdrażanych przez właścicieli polskich klubów. Skala przedsięwzięcia jest ogromna. Autorzy postawili aż 39 pytań badawczych oraz 11 hipotez, dlatego książkę należy czytać jak kompendium wiedzy i „swoistą encyklopedię". Coś interesującego znajdzie tu dla siebie zarówno menedżer sportu, jak i prawnik, ekonomista, marketingowiec, działacz, samorządowiec czy pracownik działu zarządzania zasobami ludzkimi.
title: Recenzja: "Polski Dziki Zachód. Przymusowe migracje i kulturowe oswajanie Nadodrza 1945–1948"/ Beata Halicka. Kraków: Universitas, 2015. ISBN: 978-83-242-2683-2
Creators: name: Szajda, Marek
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2021

description: Mogłoby się wydawać, że o polskich Ziemiach Zachodnich napisano już wszystko lub niemal wszystko. Wszak tematyka ta była i jest dość popularna wśród badaczy dziejów najnowszych, nie wspominając już o pracownikach instytucji dedykowanych tylko temu zagadnieniu: Instytutowi Zachodniemu, Ośrodkowi Badań Naukowych im. Wojciecha Kętrzyńskiego czy ostatnio także wrocławskiemu Ośrodkowi „Pamięć i Przyszłość". Beata Halicka, autorka „Polskiego Dzikiego Zachodu" pokazała, że jest jeszcze sporo do powiedzenia. W swojej książce podejmującej temat migracji i osadnictwa na terenach pozyskanych przez państwo polskie w 1945 r., wprowadza nie tylko nowe spojrzenie, ale również udanie „odświeża" dyskurs.
Additional file 4: of The effects of a home-based exercise intervention on elderly patients with knee osteoarthritis: a quasi-experimental study
Creators: name: Chen, Hongbo
name: Zheng, Xiaoyan
name: Huang, Hongjie
name: Liu, Congying
name: Wan, Qiaoqin
name: Shang, Shaomei
Publisher: name: figshare
Year: 2019
Subjects: Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified

description: The TIDieR (Template for Intervention Description and Replication) Checklist. (DOCX 29 kb)
title: Recenzja: "Party Colonisation of the Media in Central and Eastern Europe" / Péter Bajomi-Lázár. Budapest: Central European University, 2014. ISBN: 978-963-386-041-0.
Creators: name: Walecka-Rynduch, Agnieszka
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2021

description: Jak kształtują się relacje wolnych mediów i wolnych partii w krajach, które do ostatniej dekady XX wieku funkcjonowały w realiach reżimu komunistycznego? Badanie tych relacji i pokazywanie wielości dróg i rozwiązań, które ukształtowały się w tym obszarze świata współcześnie, nadal rozpala badawczą ciekawość naukowców. Książka Pétera Bajomi-Lázára Party Colonisation of the Media in Central and Eastern Europe jest pokłosiem właśnie takiej badawczej chęci poznania i usystematyzowania przesłanek i procesów, które obserwujemy we współczesnych mediach. Bazuje na wynikach projektu naukowego „Media i demokracja w krajach Europy Środkowej i Wschodniej", w który swój wkład mieli badacze z krajów tego obszaru Europy. Wszystkich ich Autor wymienił na pierwszych stronicach książki.
Joint Detection and Localization of Stealth False Data Injection Attacks in Smart Grids using Graph Neural Networks
Creators: name: Boyaci, Osman
name: Narimani, Mohammad Rasoul
name: Davis, Katherine
name: Ismail, Muhammad
name: Overbye, Thomas J
name: Serpedin, Erchin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Cryptography and Security (cs.CR)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: False data injection attacks (FDIA) are a main category of cyber-attacks threatening the security of power systems. Contrary to the detection of these attacks, less attention has been paid to identifying the attacked units of the grid. To this end, this work jointly studies detecting and localizing the stealth FDIA in power grids. Exploiting the inherent graph topology of power systems as well as the spatial correlations of measurement data, this paper proposes an approach based on the graph neural network (GNN) to identify the presence and location of the FDIA. The proposed approach leverages the auto-regressive moving average (ARMA) type graph filters (GFs) which can better adapt to sharp changes in the spectral domain due to their rational type filter composition compared to the polynomial type GFs such as Chebyshev. To the best of our knowledge, this is the first work based on GNN that automatically detects and localizes FDIA in power systems. Extensive simulations and visualizations show that the proposed approach outperforms the available methods in both detection and localization of FDIA for different IEEE test systems. Thus, the targeted areas can be identified and preventive actions can be taken before the attack impacts the grid.
description: 13 pages
title: Recenzja: "Ludwik Fleck. Tradycje-inspiracje-interpretacje"/ Bożena Płonka-Syroka, Paweł Jarnicki, Bogdan Balicki (red.). Wrocław:Wydawnictwo Fundacji Projekt Nauka & Uniwersytet Medyczny im. Piastów Śląskich we Wrocławiu, 2015. ISBN: 978-83-63270-14-8.
Creators: name: Gryglewski, Ryszard
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2021

description: Ludwik Fleck, lekarz mikrobiolog, teoretyk medycyny i twórca oryginalnej koncepcji epistemologicznej opisującej zjawisko kształtowania się faktu naukowego pozostawał przez długi czas niemal niezauważony. Najważniejsza, podsumowująca i ostatecznie formułująca model metodologiczny oraz teoriopoznawczy monografia Entstehung und Entwicklung einer wissenschaftlichen Tatsache. (...) Recenzowana książka jest w pewnym sensie tej dyskusji podsumowaniem, a za razem próbą stworzenia nowego, szerszego niż dotąd spojrzenia na konsekwencje jakie z sobą niosą propozycje metodologiczne i teoriopoznawcze Flecka. Nie ulega bowiem wątpliwości, że spuścizna Flecka była i nadal jest rozpatrywana z pozycji różnych strategii badawczych, co niejednokrotnie prowadzi do dużych rozbieżności interpretacyjnych. Dodatkowym problemem, na co zwraca uwagę we wstępie Bożena Płonka-Syroka, jest brak spójności semantycznej w kolejnych edycjach tekstów dokonywanych w językach polskim, niemieckim i angielskim.
Surface states and quasiparticle interference in Bernal and rhombohedral graphite with and without trigonal warping
Creators: name: Kaladzhyan, Vardan
name: Pinon, Sarah
name: Joucken, Frédéric
name: Ge, Zhehao
name: Quezada-Lopez, Eberth A.
name: Taniguchi, T.
name: Watanabe, K.
name: Velasco, Jairo
name: Bena, Cristina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use an exact analytical technique [Phys. Rev. B \textbf{101}, 115405 (2020), Phys. Rev. B \textbf{102}, 165117 (2020)] to recover the surface Green's functions for Bernal (ABA) and rhombohedral (ABC) graphite. For rhombohedral graphite we recover the predicted surface flat bands. For Bernal graphite we find that the surface state spectral function is similar to the bilayer one, but the trigonal warping effects are enhanced, and the surface quasiparticles have a much shorter lifetime. We subsequently use the T-matrix formalism to study the quasiparticle interference patterns generated on the surface of semi-infinite ABA and ABC graphite in the presence of impurity scattering. We compare our predictions to experimental STM data of impurity-localized states on the surface of Bernal graphite which appear to be in a good agreement with our calculations.
description: 13 pages, 17 figures
Asymptotic behaviour of a rapidly rotating fluid with random stationary surface stress
Creators: name: Dalibard, Anne-Laure
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76U05, 35B40, 86A05, 35R60

description: The goal of this paper is to describe in mathematical terms the effect on the ocean circulation of a random stationary wind stress at the surface of the ocean. In order to avoid singular behaviour, non-resonance hypotheses are introduced, which ensure that the time frequencies of the wind-stress are different from that of the Earth rotation. We prove a convergence result for a three-dimensional Navier-Stokes-Coriolis system in a bounded domain, in the asymptotic of fast rotation and vanishing vertical viscosity, and we exhibit some random and stationary boundary layer profiles. At last, an average equation is derived for the limit system in the case of the non-resonant torus.
description: 45 pages
title: Rezension: "Od uprzemysłowienia w PRL do deindustrializacji kraju. Losy zakładów przemysłowych po 1945 roku" / Andrzej Karpiński, Wiesław Żółtkowski, Paweł Soroka, Stanisław Paradysz, 2015. Warszawa: Muza, 2015. ISBN: 978-83-287-0186-1
Creators: name: Peters, Florian
name: Digitale Wissenschaftsplattform Pol-Int (Www.Pol-Int.Org)
Publisher: name: Europa-Universität Viadrina Frankfurt
Year: 2021

description: Dieses Buch ist voller Zahlen, Tabellen und Statistiken, aber dennoch kommt es keineswegs sine ira et studio (dt. ohne Zorn und Eifer) daher. Ganz im Gegenteil: Den Autoren geht es nach eigenem Bekunden um nichts weniger, als die „Pflicht unserer Generation" zu erfüllen und die Lebensleistung jener 1,7 Millionen Menschen zu würdigen, die oftmals jahrzehntelang in volkspolnischen Industriebetrieben arbeiteten, bevor sie ihren Arbeitsplatz im Zuge der radikalen Systemtransformation nach 1989 verloren (S. 14). Über die konkreten Arbeitsbedingungen und Lebenswelten der Industriearbeiterschaft im polnischen Staatssozialismus erfährt man freilich kaum etwas; vielmehr hat sich das Autorenkollektiv eine statistische Erfassung aller größeren Industriebetriebe mit mehr als 100 Mitarbeitern zum Ziel gesetzt, die in der Volksrepublik aufgebaut und nach 1989 „liquidiert", also abgewickelt wurden.
Root numbers of elliptic curves in residue characteristic 2
Creators: name: Dokchitser, T.
name: Dokchitser, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G07, 11F80

description: To determine the global root number of an elliptic curve defined over a number field, one needs to understand all the local root numbers. These have been classified except at places above 2, and in this paper we attempt to complete the classification. At places above 2, we express the local root numbers in terms of norm residue symbols (resp. root numbers of explicit 1-dimensional characters) in case when wild inertia acts through a cyclic (resp. quaternionic) quotient.
description: 10 pages
Dyadic models for ideal MHD
Creators: name: Dai, Mimi
name: Friedlander, Susan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35, 76B03, 76W05

description: We study two dyadic models for incompressible ideal magnetohydrodynamics, one with a uni-directional energy cascade and the other one with both forward and backward energy cascades. Global existence of weak solutions and local well-posedness are established for both models. In addition, solutions to the model with uni-directional energy cascade associated with positive initial data are shown to develop blow-up at a finite time. Moreover, a set of fixed points is found for each model. Linear instability about some particular fixed points is proved.
description: 20 pages
Nuclear-Physics Multi-Messenger Astrophysics Constraints on the Neutron-Star Equation of State: Adding NICER's PSR J0740+6620 Measurement
Creators: name: Pang, Peter T. H.
name: Tews, Ingo
name: Coughlin, Michael W.
name: Bulla, Mattia
name: Broeck, Chris Van Den
name: Dietrich, Tim
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the past few years, new observations of neutron stars and neutron-star mergers have provided a wealth of data that allow one to constrain the equation of state of nuclear matter at densities above nuclear saturation density. However, most observations were based on neutron stars with masses of about 1.4 solar masses, probing densities up to $\sim$ 3-4 times the nuclear saturation density. Even higher densities are probed inside massive neutron stars such as PSR J0740+6620. Very recently, new radio observations provided an update to the mass estimate for PSR J0740+6620 and X-ray observations by the NICER and XMM telescopes constrained its radius. Based on these new measurements, we revisit our previous nuclear-physics multi-messenger astrophysics constraints and derive updated constraints on the equation of state describing the neutron-star interior. By combining astrophysical observations of two radio pulsars, two NICER measurements, the two gravitational-wave detections GW170817 and GW190425, detailed modeling of the kilonova AT2017gfo, as well as the gamma-ray burst GRB170817A, we are able to estimate the radius of a typical 1.4-solar mass neutron star to be $11.94^{+0.76}_{-0.87} \rm{km}$ at $90\%$ confidence. Our analysis allows us to revisit the upper bound on the maximum mass of neutron stars and disfavors the presence of a strong first-order phase transition from nuclear matter to exotic forms of matter, such as quark matter, inside neutron stars.
description: 13 pages, 5 figures