cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Equivalence of Effective Medium and Random Resistor Network models for disorder-induced unsaturating linear magnetoresistance
Creators: name: Ramakrishnan, Navneeth
name: Lai, Ying Tong
name: Lara, Silvia
name: Parish, Meera M.
name: Adam, Shaffique
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A linear unsaturating magnetoresistance at high perpendicular magnetic fields, together with a quadratic positive magnetoresistance at low fields, has been seen in many different experimental materials, ranging from silver chalcogenides and thin films of InSb to topological materials like graphene and Dirac semimetals. In the literature, two very different theoretical approaches have been used to explain this classical magnetoresistance as a consequence of sample disorder. The phenomenological Random Resistor Network model constructs a grid of four-terminal resistors, each with a varying random resistance. The Effective Medium Theory model imagines a smoothly varying disorder potential that causes a continuous variation of the local conductivity. Here, we demonstrate numerically that both models belong to the same universality class and that a restricted class of the Random Resistor Network is actually equivalent to the Effective Medium Theory. Both models are also in good agreement with experiments on a diverse range of materials. Moreover, we show that in both cases, a single parameter, i.e. the ratio of the fluctuations in the carrier density to the average carrier density, completely determines the magnetoresistance profile.
description: 6 pages, 5 figures
Fault zone behaviour: microstructural evidence from slow slip shear failure mylonites
Creators: name: Moore, Josephine
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: The behavior of major plate boundary fault zones in the brittle-ductile transition remains poorly understood despite the significant role the behavior of this zone has in the formation ofhydrothermal ores and nucleation of earthquakes. Recent geophysical evidence of continental faults and subduction zones suggests that aseismic slip occurs on deep extensions of fault zones. These episodic, low frequency events of slow slip are widely linked to the presence of overpressured metamorphic fluids, such as is interpreted from the geophysical signal of the Alpine Fault, New Zealand. A combination of detailed petrographic and mineral chemistry analysis with quantitative microstructural analysis using Electron Backscatter Diffraction is used to investigate indicators of slow slip shear failure. This study shows that Alpine Fault mylonites periodically behaved in a brittle manner, as evidenced by mm to cm scale rupture microstructures such as several generations of quartz dominated veining, microcracking of plastically deformed quartz grains, fracturing combined with recrystallization of garnet, the localization of highly porous shear bands and localized fluid influx as evidenced by only locally developed metamorphic reaction structures. Recognition of such structures can be used as first order indicators for slow slip fault failure.
Generating entanglement with linear optics
Creators: name: Stanisic, Stasja
name: Linden, Noah
name: Montanaro, Ashley
name: Turner, Peter S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement is the basic building block of linear optical quantum computation, and as such understanding how to generate it in detail is of great importance for optical architectures. We prove that Bell states cannot be generated using only 3 photons in the dual-rail encoding, and give strong numerical evidence for the optimality of the existing 4 photon schemes. In a setup with a single photon in each input mode, we find a fundamental limit on the possible entanglement between a single mode Alice and arbitrary Bob. We investigate and compare other setups aimed at characterizing entanglement in settings more general than dual-rail encoding. The results draw attention to the trade-off between the entanglement a state has and the probability of postselecting that state, which can give surprising constant bounds on entanglement even with increasing numbers of photons.
description: 13 pages, 10 figures, 1 table, comments welcome
Priorities for tackling the obesity crisis in England: Expert agreement on what needs to be done October 2016 (Food-EPI).
Creators: name: Foundation, The Food
Publisher: name: The University of Auckland
Year: 2017
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: England Food Environment Policy Brief, Food-EPI 2016
Generalized Fragmentation Functions for Fractal Jet Observables
Creators: name: Elder, Benjamin T.
name: Procura, Massimiliano
name: Thaler, Jesse
name: Waalewijn, Wouter J.
name: Zhou, Kevin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We introduce a broad class of fractal jet observables that recursively probe the collective properties of hadrons produced in jet fragmentation. To describe these collinear-unsafe observables, we generalize the formalism of fragmentation functions, which are important objects in QCD for calculating cross sections involving identified final-state hadrons. Fragmentation functions are fundamentally nonperturbative, but have a calculable renormalization group evolution. Unlike ordinary fragmentation functions, generalized fragmentation functions exhibit nonlinear evolution, since fractal observables involve correlated subsets of hadrons within a jet. Some special cases of generalized fragmentation functions are reviewed, including jet charge and track functions. We then consider fractal jet observables that are based on hierarchical clustering trees, where the nonlinear evolution equations also exhibit tree-like structure at leading order. We develop a numeric code for performing this evolution and study its phenomenological implications. As an application, we present examples of fractal jet observables that are useful in discriminating quark jets from gluon jets.
description: 37+18 pages, 24 figures
Multidimensionality of performance dynamics in microfinance institutions: evidence from emerging economies
Creators: name: Lonbani, Delaram Najmaei
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Microfinance Institutions (MFIs) have been proven to be an effective organizational channel to alleviate poverty and create social value in many countries. The cost-effective provision of financial services to underprivileged communities has caused the industry to grow over decades. However, the low performance of MFIs has hindered the industry from reaching its maximum. Moreover, studying the multidimensionality of MFIs is a recent topic, with limited attention to the environmental bottom line and dynamic evaluation. Therefore, this study aims to address these gaps by applying the Malmquist Index (MI), with further investigation of the source of performance dynamics. We apply an unbalance panel of 53 MFIs across three major emerging countries for the years 2009-2015 (214 observations). An approach for dealing with unbalanced data is also developed and used. The results suggest that the financial and environmental performance have slightly improved due to the progress in technical efficiency. Nonetheless, the dynamics of overall performance, represented by the change in overall productivity, has deteriorated in line with social performance deterioration. Unlike financial and environmental performance, technological advances have a positive impact on social and overall performance.
Multi-Agent Reinforcement Learning for Coordinated Drone Swarms
Creators: name: Researchscholar
Publisher: name: Zenodo
Year: 2025

description: Drones are increasingly being deployed in critical operations such as search and rescue, environmental monitoring, agricultural surveying, and military reconnaissance. The effectiveness of these applications is significantly enhanced when drones operate as a coordinated swarm. Multi-Agent Reinforcement Learning (MARL) has emerged as a promising approach to enabling decentralized coordination among autonomous drones. Unlike traditional control methods, MARL allows agents to learn collaborative behaviors through trial-and-error interactions with their environment and each other. This paper explores the foundational principles of MARL as applied to drone swarms, including state representation, reward design, and decentralized policy learning. It examines use cases in dynamic target tracking, area coverage, and cooperative transport. Case studies from research labs and field deployments highlight the practical successes and limitations of MARL-based drone coordination. The paper further discusses ethical and safety concerns related to autonomy, privacy, and control. Finally, it addresses challenges such as partial observability, scalability, and simulation-to-reality transfer, and outlines future innovations in hierarchical learning, communication protocols, and real-time adaptive systems. Multi-agent reinforcement learning is poised to redefine the frontier of aerial robotics by enabling intelligent, flexible, and cooperative swarm behaviors in complex environments.
Hidden symmetry in a Kuramoto-Sivashinsky initial-boundary value problem
Creators: name: Buono, Pietro-Luciano
name: van Veen, Lennaert
name: Frawley, Eryn
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37G40, 35B32

description: We investigate the bifurcation structure of the Kuramoto-Sivashinsky equation with homogeneous Dirichlet boundary conditions. Using hidden symmetry principles, based on an extended problem with periodic boundary conditions and $\Otwo$ symmetry, we show that the zero solution exhibits two kinds of pitchfork bifurcations: one that breaks the reflection symmetry of the system with Dirichlet boundary conditions and one that breaks a shift-reflect symmetry of the extended system. Using Lyapunov-Schmidt reduction, we show both to be supercritical. We extend the primary branches by means of numerical continuation, and show that they lose stability in pitchfork, transcritical or Hopf bifurcations. Tracking the corresponding secondary branches reveals an interval of the viscosity parameter in which up to four stable equilibria and time-periodic solutions coexist. Since the study of the extended problem is indispensible for the explanation of the bifurcation structure, the Kuramoto-Sivashinsky problem with Dirichlet boundary conditions provides an elegant manifestation of hidden symmetry.
description: 13 pages, 4 figures
Исследование роли составных частей смеси мороженого в формировании и стабилизации структуры продукта
Creators: name: Тутарашвили Ксения Гочаевна
name: Серова Ольга Петровна
name: Горлов Иван Федорович
name: Сложенкина Марина Ивановна
name: Мосолова Наталья Ивановна
name: Брехова Светлана Андреевна
Publisher: name: Пищевая промышленность
Year: 2019
Subjects: лечебно-профилактические свойства
мороженое
структура продукта
технология
функциональные ингредиенты
хурма

description: Статья посвящена комплексному исследованию целесообразности обогащения мороженого плодами хурмы сушеной. Целью работы является изучение формирования и стабилизации структуры мороженого при повышении его пищевой ценности за счет внесения в рецептуру плодов хурмы сушеной. Работу выполняли в лаборатории Волгоградского государственного технического университета. Методы исследования применяли традиционные для лабораторий молокоперерабатывающих заводов, опираясь на действующие ГОСТы. В статье представлен литературный обзор алиментарно обусловленных заболеваний в Волгоградской области. Произведена теоретическая оценка способности плодов хурмы сушеной обогатить молочный продукт следующими нутриентами: железом, йодом, хромом, марганцем, медью и пантотеновой кислотой. Согласно полученным данным, был сделан вывод о том, что вносимое количество плодов сушеных хурмы после тепловой и механической обработки позволяет восполнить более 15 % суточной нормы потребления вышеуказанных необходимых для организма человека питательных веществ. Расчетным путем созданы рецептуры мороженого сорта пломбир с различной долей содержания обогащающего растительного компонента субтропического происхождения. Из коровьего молока был выработан контрольный образец мороженого по стандартной технологии пломбира и 3 опытных образца с внесением в рецептуру различной массовой доли сушеных плодов хурмы: 30 % – образец № 1, 25 % – образец № 2 и 35 % – образец № 3. Определены органолептические показатели выработанных образцов мороженого, на основе которых создана профилограмма объектов исследования. Также определяли взбитость, сопротивляемость таянию и формоустойчивость полученных образцов мороженого. Установлено, что оптимальными характеристиками обладает образец № 1, в котором каждый из органолептических показателей получил максимальный балл, а сопротивляемость таянию и взбитость составили 17 и 48 % соответственно.
Accretion Flow Properties of Swift J1753.5-0127 during its 2005 outburst
Creators: name: Debnath, Dipak
name: Jana, Arghajit
name: Chakrabarti, Sandip K.
name: Chatterjee, Debjit
name: Mondal, Santanu
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Galactic X-ray binary black hole candidate Swift~J1753.5-0127 was discovered on June 30 2005 by Swift/BAT instrument. In this paper, we make detailed analysis of spectral and timing properties of its 2005 outburst using RXTE/PCA archival data. We study evolution of spectral properties of the source from spectral analysis with the additive table model {\it fits} file of the Chakrabarti-Titarchuk two-components advective flow (TCAF) solution. From spectral fit, we extract physical flow parameters, such as, Keplerian disk accretion rate, sub-Keplerian halo rate, shock location and shock compression ratio, etc. We also study the evolution of temporal properties, such as observation of low frequency quasi-periodic oscillations (QPOs), variation of X-ray intensity throughout the outburst. From the nature of the variation of QPOs, and accretion rate ratios (ARRs=ratio of halo to disk rates), we classify entire 2005 outburst into two harder (hard-intermediate and hard) spectral states. No signature of softer (soft-intermediate and soft) spectral states are seen. This may be because of significant halo rate throughout the outburst. This behavior is similar to a class of other short orbital period sources, such as, MAXI~J1836-194, MAXI~J1659-152 and XTE~J1118+480. Here, we also estimate probable mass range of the source, to be in between $4.75 M_\odot$ to $5.90 M_\odot$ based on our spectral analysis.
description: 14 pages, 5 Figures, ApJ (communicated)
The Nature of the Faint Low-Frequency Radio Source Population
Creators: name: Ocran, E. F.
name: Taylor, A. R.
name: Vaccari, M.
name: Green, D. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a multi-wavelength study into the nature of faint radio sources in a deep radio image with the Giant Meterwave Radio Telescope at 612\,MHz covering 1.2 deg$^2$ of the ELAIS N1 region. We detect 2800 sources above 50~$μ$Jy\,beam$^{-1}$. By matching to multi-wavelength data we obtain a redshift estimate for 63\%, with 29\% based on spectroscopy. For 1526 of the sources with redshifts we use radio and X-ray luminosity, optical spectroscopy, mid-infrared colors, and 24$μ$m and IR to radio flux ratios to search for the presence of an AGN. The analysis reveals a rapid change in the population as flux density decreases from $\sim$500\,$μ$Jy to $\sim$100\,$μ$Jy. We find that 80.3\% of the objects show no evidence of AGN and have multi-wavelength properties consistent with radio emission from star forming galaxies (SFG). We classify 11.4\% as Radio Quiet (RQ) AGN and the remaining 8.3\% as Radio Loud (RL) AGN. The redshift of all populations extends to $z > 3$ with a median of $\sim$1. The median radio and far-IR luminosity increases systematically from SFG, to RQ AGN and RL AGN. The median $q_{\rm 24 μm}$ for SFG, $0.89\pm0.01$ is slightly below that for RQ AGN, $1.05\pm0.03$, and both differ substantially from the value for RL AGN of $-0.06\pm0.07$. However, SFG and RQ AGN show no significant difference in far-IR/radio ratios and have statistically indistinguishable star formation rates inferred from radio and far-IR luminosities. We conclude that radio emission from host galaxies of RQ AGN in this flux density regime result primarily from star formation activity.
description: 15 pages, 15 figures and 6 tables. Accepted for publication in MNRAS
Aggregation-fragmentation-diffusion model for trail dynamics
Creators: name: Kawagoe, Kyle
name: Huber, Greg
name: Pradas, Marc
name: Wilkinson, Michael
name: Pumir, Alain
name: Ben-Naim, Eli
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate statistical properties of trails formed by a random process incorporating aggregation, fragmentation, and diffusion. In this stochastic process, which takes place in one spatial dimension, two neighboring trails may combine to form a larger one and also, one trail may split into two. In addition, trails move diffusively. The model is defined by two parameters which quantify the fragmentation rate and the fragment size. In the long-time limit, the system reaches a steady state, and our focus is the limiting distribution of trail weights. We find that the density of trail weight has power-law tail $P(w) \sim w^{-γ}$ for small weight $w$. We obtain the exponent $γ$ analytically, and find that it varies continuously with the two model parameters. The exponent $γ$ can be positive or negative, so that in one range of parameters small-weight tails are abundant, and in the complementary range, they are rare.
description: 8 pages, 8 figures
Policies for tackling obesity and creating healthier food environments Scorecard and priority recommendations for the Australian Federal government (2017) Full Report
Creators: name: Dr Gary Sacks
Publisher: name: The University of Auckland
Year: 2017
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: 2017 Australian Food-EPI Full Report
Engineering Computations Module 3: Fly at change in systems
Creators: name: Barba, Lorena A.
name: Clementi, Natalia C.
Publisher: name: figshare
Year: 2017
Subjects: subject: 130306 Educational Technology and Computing
subject: FOS: Educational sciences
subject: Education
subject: 130103 Higher Education
subject: 130212 Science, Technology and Engineering Curriculum and Pedagogy

description: Engineering Computations—Original material written as Jupyter Notebooks for an undergraduate engineering course, Fall 2017
Module 3: Fly at change in systems

After the two foundation course modules, equipping you with the coding patterns for numerical computing, this module is our launching pad to investigate change, motion, and dynamics, using computational thinking.
Lesson 1: Catch things in motion
Working with images and videos in Python using imageio. Interactive Matplotlib figures in the notebook, and capturing mouse clicks on images for digitizing an object's position. Computing velocity and acceleration from position captures: a falling ball, and projectile motion. Computing numerical derivatives using differences. Free-fall acceleration from real data.
Lesson 2: Step to the future
Computing velocity and position from accelerometer data: a roller-coaster ride. Using the subplot() function go draw more than one plot in the same figure. Euler's method for initial-value problems, and Taylor expansion showing first-order accuracy. The second-order differential model for an object in free fall written as two first-order differential equations, leading to a vector form. General design of a code to solve ordinary differential equations (ODEs). Application to free fall of a tennis ball and comparison with experimental data. Improved model accounting for air resistance.
Lesson 3: Get with the oscillations
Differential model of a spring-mass system without friction: state vector and system in vector form. Amplitude growth with Euler's method on oscillatory systems, and the fix: Euler-Cromer method (semi-implicit Euler). Numerically observed order of accuracy using a convergence plot: numerical error with different time increments, ∆t. Modified Euler's method, and observed order of accuracy.
Lesson 4: Bird's-eye view of mechanical vibrations
General spring-mass systems with damping and a driving force, revealing a variety of behaviors. Presents a powerful new method to study dynamical systems based on visualizing direction fields and trajectories in the phase plane.
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Note—If you have suggestions for changes or improvements to this material, please open an issue on the GitHub repository.
Executive Summary: Policies for tackling obesity and creating healthier food environments Scorecard and priority recommendations for Australian governments (2017)
Creators: name: Dr Gary Sacks
Publisher: name: The University of Auckland
Year: 2017
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: 2017 Australian Food-EPI Scorecard Document (Executive Summary)
Prescriptive Unitarity
Creators: name: Bourjaily, Jacob L.
name: Herrmann, Enrico
name: Trnka, Jaroslav
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a prescriptive approach to generalized unitarity, resulting in a strictly-diagonal basis of loop integrands with coefficients given by specifically-tailored residues in field theory. We illustrate the power of this strategy in the case of planar, maximally supersymmetric Yang-Mills theory, where we construct closed-form representations of all ($n$-point N$^k$MHV) scattering amplitudes through three loops. The prescriptive approach contrasts with the ordinary description of unitarity-based methods by avoiding any need for linear algebra to determine integrand coefficients. We describe this approach in general terms as it should have applications to many quantum field theories, including those without planarity, supersymmetry, or massless spectra defined in any number of dimensions.
description: 59 pages, 129 figures, 2 tables
Is there a circumbinary planet around NSVS 14256825?
Creators: name: Nasiroglu, Ilham
name: Gozdziewski, Krzysztof
name: Slowikowska, Aga
name: Krzeszowski, Krzysztof
name: Zejmo, Michal
name: Zola, Staszek
name: Er, Huseyin
name: Ogloza, Waldemar
name: Drozdz, Marek
name: Koziel-Wierzbowska, Dorota
name: Debski, Bartlomiej
name: Karaman, Nazil
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The cyclic behaviour of (O-C) residuals of eclipse timings in the sdB+M eclipsing binary NSVS 14256825 was previously attributed to one or two Jovian-type circumbinary planets. We report 83 new eclipse timings that not only fill in the gaps in those already published but also extend the time span of the (O-C) diagram by three years. Based on the archival and our new data spanning over more than 17 years we re-examined the up to date system (O-C). The data revealed systematic, quasi-sinusoidal variation deviating from an older linear ephemeris by about 100 s. It also exhibits a maximum in the (O-C) near JD 2,456,400 that was previously unknown. We consider two most credible explanations of the (O-C) variability: the light propagation time due to the presence of an invisible companion in a distant circumbinary orbit, and magnetic cycles reshaping one of the binary components, known as the Applegate or Lanza-Rodono effect. We found that the latter mechanism is unlikely due to the insufficient energy budget of the M-dwarf secondary. In the framework of the third-body hypothesis, we obtained meaningful constraints on the Keplerian parameters of a putative companion and its mass. Our best-fitting model indicates that the observed quasi-periodic (O-C) variability can be explained by the presence of a brown dwarf with the minimal mass of 15 Jupiter masses rather than a planet, orbiting the binary in a moderately elliptical orbit (~ 0.175) with the period of ~ 10 years. Our analysis rules out two planets model proposed earlier.
description: 17 pages, 9 figures, 4 tables, accepted to AJ
A methodology to select galaxies just after the quenching of star formation
Creators: name: Citro, Annalisa
name: Pozzetti, Lucia
name: Quai, Salvatore
name: Moresco, Michele
name: Vallini, Livia
name: Cimatti, Andrea
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We propose a new methodology aimed at finding star-forming galaxies in the phase which immediately follows the star-formation (SF) quenching, based on the use of high- to low-ionization emission line ratios. These ratios rapidly disappear after the SF halt, due to the softening of the UV ionizing radiation. We focus on [O III] $λ$5007/H$α$ and [Ne III] $λ$3869/[O II] $λ$3727, studying them with simulations obtained with the CLOUDY photoionization code. If a sharp quenching is assumed, we find that the two ratios are very sensitive tracers as they drop by a factor $\sim$ 10 within $\sim$ 10 Myr from the interruption of the SF; instead, if a smoother and slower SF decline is assumed (i.e. an exponentially declining star-formation history with $e$-folding time $τ=$ 200 Myr), they decrease by a factor $\sim$ 2 within $\sim$ 80 Myr. We mitigate the ionization -- metallicity degeneracy affecting our methodology using pairs of emission line ratios separately related to metallicity and ionization, adopting the [N II] $λ$6584/[O II] $λ$3727 ratio as metallicity diagnostic. Using a Sloan Digital Sky Survey galaxy sample, we identify 10 examples among the most extreme quenching candidates within the [O III] $λ$5007/H$α$ vs. [N II] $λ$6584/[O II] $λ$3727 plane, characterized by low [O III] $λ$5007/H$α$, faint [Ne III] $λ$3869, and by blue dust-corrected spectra and $(u-r)$ colours, as expected if the SF quenching has occurred in the very recent past. Our results also suggest that the observed fractions of quenching candidates can be used to constrain the quenching mechanism at work and its time-scales.
description: Accepted for publication in MNRAS; 19 pages, 21 figures, 1 table
What can you do for the reader?: the literary effects of the second person narrative voice
Creators: name: Davis, Anthony Llewellyn
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: This PhD thesis seeks to isolate and exploit the unique literary effects that can beachieved with the sustained second person narrative voice in fiction. Secondperson, particularly in its sustained form, is a fascinating but rarely used modeamong novelists, and has been given comparatively little attention by theacademy. The project involved a thorough review of current research, a reading ofevery sustained second person novel that could be identified, and a testing of whatwas learned by experimentation, ie, by the writing of original second personfiction.
Collisions near Kerr black holes: lower limit of energy between orbiting and incoming particles
Creators: name: Rutkowski, Mieszko
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: 83C10 (Primary), 83C57 (Secondary)

description: In our paper we investigate the lower limit of collisional energy of test particles near the Kerr black hole. In particular we examine the minimal Lorentz factor between the freely falling particles and the particles orbiting around a black hole. We consider collisions on the innermost stable circular orbit (ISCO) and examine near--extreme case, where collisions take place near an event horizon. By fine--tuning the particles' angular momentum, the Lorentz factor of the collision can always be minimized to a value dependent on the black hole's spin. We identified that this minimal value is always less than $\frac{2\sqrt{2}-1}{\sqrt{3}}$ and more than $\frac{\sqrt{12}-1}{\sqrt{6}}$ (the limits are the values for an extreme Kerr and Schwarzschild, respectively). It implies that this kind of collisions of compact objects are expected to be highly energetic near supermassive black holes. In addition, we show that an interaction between black hole's and particle's spins has an influence on minimal Lorentz factor. This contribution is nonnegligible for near--extreme black holes. We also discuss the relation between our results and sci--fi movie Interstellar.
description: 12 pages, 4 figures, accepted for publication in General Relativity and Gravitation
Locally recoverable codes from algebraic curves and surfaces
Creators: name: Barg, Alexander
name: Haymaker, Kathryn
name: Howe, Everett W.
name: Matthews, Gretchen L.
name: Várilly-Alvarado, Anthony
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94B27, 14G50

description: A locally recoverable code is a code over a finite alphabet such that the value of any single coordinate of a codeword can be recovered from the values of a small subset of other coordinates. Building on work of Barg, Tamo, and Vlăduţ, we present several constructions of locally recoverable codes from algebraic curves and surfaces.
description: 27 pages
Engineering Computations Module 2: Take off with stats
Creators: name: Barba, Lorena A.
name: Clementi, Natalia C.
Publisher: name: figshare
Year: 2017
Subjects: subject: 130306 Educational Technology and Computing
subject: FOS: Educational sciences
subject: Education
subject: 130103 Higher Education
subject: 130212 Science, Technology and Engineering Curriculum and Pedagogy

description: Engineering Computations—Original material written as Jupyter Notebooks for an undergraduate engineering course, Fall 2017
Module 2: Take off with stats

The first module of this course, "Get data off the ground," assumed no coding experience and created a foundation with Python programming constructs and data structures. You learned to play with strings, lists and NumPy arrays, using indexing, slicing, for- and if-statements, and functions. The second course module explores practical statistical analysis with Python.
Lesson 1: Cheers! Stats with beers
Exploratory analysis using a data set of canned craft beers in the US. Introduces the pandaslibrary and its data types: Data Frames and Series. Use pandas to read a data file, extract selected columns, and remove null values. Descriptive statistics: measures of central tendency and variability. Distribution plots: histograms with Matplotlib. Comparing with a normal distribution.
Lesson 2: Seeing stats in a new light
Continuing with the data set of canned craft beers, this lesson focuses on visualizing statistics. For quantitative data: histograms and box plots; for categorical data: bar plots. Visualizing multiple data with scatter plots and bubble charts.
Lesson 3: Lead in lipstick
A full worked example using what you learned in lessons 1 and 2: using data from studies by the US Food and Drug Administration on the lead content in lipstick, we fact-check alarming news headlines. Based on Prof. Kristin Sainani's lecture, "Exploring real data: lead in lipstick," of her Stanford Online course "Statistics in Medicine."
Lesson 4: Life expectancy and wealth
Deeper dive into pandas, using data for life expectancy and per-capita income over time, across the world. Inspired by the work of Hans Rosling. Pandas methods: head(), info(), value_counts(), groupby(), describe(), groupby.first(), groupby.get_group(), idxmin() Categorical data type. Bubble plots, spaghetti plots, and interactive widgets.
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Note—If you have suggestions for changes or improvements to this material, please open an issue on the GitHub repository.
Preparative scale release and purification of N-linked glycan standards from human milk glycoproteins
Creators: name: Chong, Raymond Wei Wern
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Glycosylation has been implicated in many important biological processes, disease states, and host-pathogen interactions yet progress in understanding the biological roles and functions of glycosylation has been limited by the lack of standardised tools and techniques. Purified glycans of specific structure are extremely valuable as standards for structural characterisation of glycans as well as for the calibration of instruments, and the validation or comparison of analytical techniques. However, structurally defined glycans have proven difficult to obtain in ample quantities, are extremely complex to produce synthetically, and when commercially available, are considerably expensive. In this work, a method was developed for obtaining preparative scale quantities of specific N-linked glycan structures of natural origin in a laboratory based setting, as a means to prepare glycan standards for analysis and other downstream processes. Human milk was selected as a biologically relevant source of N-linked glycans due to the high glycoprotein content and growing interest in the activity of human milk glycoconjugates. A protocol for the preparative scale release of N-linked glycans from human milk proteins and a separation technique using high performance liquid chromatography (HPLC) on porous graphitised carbon (PGC) was developed. A method of offline detection was also established using matrix assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) to identify N-linked glycans in the fractions separated by PGC-HPLC. Six structurally unique N-linked glycans from human milk were separated and collected at high purity (~90%). Characterisation by PGC-LC coupled to electrospray ionisation tandem mass spectrometry (PGC-LC-ESI-MS/MS) identified a set of fucosylated N-linked glycans, structures which are not currently commercially available. Fucosylation is a specific feature of human glycosylation that is of recent interest to the medical research field, hence the development of a preparative scale technique to obtain fucosylated glycans is of significant value. A retention time library and MS fragmentation dataset of fucosylated glycans was established to facilitate their use as standards. In addition, the application of the human milk N-linked glycans in an in vitro assay was investigated, in which the glycans were assessed for their potential to inhibit bacterial binding to membrane proteins extracted from human intestinal cells.
2017 New Zealand Food-EPI Full Report Online Appendices
Creators: name: Swinburn, Boyd
name: Vandevijvere, Stefanie
name: Mackay, Sally
Publisher: name: The University of Auckland
Year: 2017
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: 2017 New Zealand Food-EPI Full Report online Appendices Document
ПРОБЛЕМА ЦЕННОСТЕЙ В КОНТЕКСТЕ СОВРЕМЕННОЙ СУБЪЕКТНОСТИ
Creators: name: Краузе Александра Анатольевна
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: субъект
индивидуализация
индивидуализм
ценности.

description: Рассматривается проблема ценностей в контексте современной субъектности. Исследуются феномены «индивидуальность» и «индивидуализм» и то, в каком соотношении они могут выступать характеристикой современного субъекта. Дается социально-философский анализ проблемы формирования и интериоризации ценностей в постинформационном обществе.
ИМУЩЕСТВЕННЫЕ ОТНОШЕНИЯ В МАЛЫХ ГОРОДАХ РЕГИОНА
Creators: name: Парамонова Светлана Павловна
name: Буров Владислав Евгеньевич
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: мобильность
типы мобильности
социальная группа.

description: Раскрывается проблема поведения личности на рынке собственности – при приобретении группами ценных объектов. Выявлены стратегии групп, «стабильных» и «прогрессивно-мобильных», на рынке манипуляций имущественными отношениями.
Executive Summary: Benchmarking Food Environments Progress by the New Zealand Government on Implementing Recommended Food Environment Policies and Prioritised Recommendations (2017).
Creators: name: Swinburn, Boyd
name: Vandevijvere, Stefanie
name: Mackay, Sally
Publisher: name: The University of Auckland
Year: 2017
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: 2017 New Zealand Food-EPI: Executive Summary
ЦЕННОСТНЫЕ ОРИЕНТИРЫ В УСЛОВИЯХ ЦИФРОВИЗАЦИИ ОБРАЗОВАНИЯ: НОВАЯ РЕАЛЬНОСТЬ / НОВАЯ УТОПИЯ?
Creators: name: Шаяхметова Венера Рюзальевна
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: Цифровизация образования
новая грамотность
контент
гуманитарный потенциал
эмоциональный интеллект
цифровой ребенок.

description: Автор акцентирует внимание на вызовах и возможностях цифровизации образования и воспитания как отправной точке конкурентоспособности государства в целом. Цифровая среда предоставляет уникальные возможности индивидуального образования, формирования новых компетентностей и запроса на новые профессиональные направления. Амбициозные задачи цифрового образования кардинально меняют роль учителя и поднимают вопрос о воспитательном потенциале цифровой среды.
ПРАВОВОЙ ДИСКУРС КАК ОБЪЕКТ СОЦИАЛЬНО- ФИЛОСОФСКОГО ПОЗНАНИЯ
Creators: name: Волков Артем Анатольевич
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: дискурс
правовой дискурс
социально-философское познание
дискурсивность.

description: Проанализирована специфика правового дискурса в социально-философском познании. Автором представлено исследование правового дискурса, в рамках которого рассмотрены различные подходы ученых-юристов. Современное понимание правового дискурса − противоречивое явление, содержащее аспекты исследования как позитивных, так и негативных перемен, происходящих в обществе. Следует заметить, что правовой дискурс представляет собой еще недостаточно изученный объект исследования как в теоретическом, так и в практическом плане, излагается самостоятельная позиция автора по этому вопросу.
Tomb story: the elite of early Egypt : an investigation concerning the influence of 'elite theory' upon interpretations of elite mortuary evidence from the Predynastic and Early Dynastic periods (4000-2545 BC)
Creators: name: Rochecouste, Olivier P.
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: The word ‘elite’ has been used since the late 19th century as a social category to define the ruling minority of modern society. The term however, has also been used by archaeologists to socially categorise individuals from the mortuary evidence who may represent institutions or ruling minorities of ancient societies. This has been applied to the study of the Egyptian Predynastic and Early Dynastic periods (4000–2545 BC) in order to outline the role of elite interaction within the development of the state. But textual sources are too vague to provide an explanation of elite interaction within various state formation theories, which can lead to numerous conclusions concerning the archaeological evidence. This thesis will discuss how the concept of elite theory has been utilised by Early Egyptian archaeologists, to interpret the material and textual evidence that is available at numerous sites; such as Hierakonpolis, Saqqara and Naqada. I will also focus on how modern terms, such as ‘elite’, are obstacles for interpreting the archaeological record and prevent a thoughtful recount of the people who lived during ancient Egypt’s earliest known times.
НЕКОТОРЫЕ АСПЕКТЫ СОВРЕМЕННОГО ФЕНОМЕНА КУЛЬТУРЫ
Creators: name: Шмыков Клим Евгеньевич
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: культура
эстетика
пространство.

description: Рассматриваются трансформация феномена культура, значение культуры для развития науки и образования в постинформационном обществе. Дается анализ возможного построения парадигмы образования в контексте расширения культурного поля
Time delay signature elimination of chaos in a semiconductor laser by dispersive feedback from a chirped FBG
Creators: name: Wang, Daming
name: Wang, Longsheng
name: Zhao, Tong
name: Gao, Hua
name: Wang, Yuncai
name: Chen, Xianfeng
name: Wang, Anbang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: 37D45 (Primary), 37N20, 78A60 (Secondary)

description: Time delay signature (TDS) of a semiconductor laser subject to dispersive optical feedback from a chirped fiber Bragg grating (CFBG) is investigated experimentally and numerically. Different from mirror, CFBG provides additional frequency-dependent delay caused by dispersion, and thus induces external-cavity modes with irregular mode separation rather than a fixed separation induced by mirror feedback. Compared with mirror feedback, the CFBG feedback can greatly depress and even eliminate the TDS, although it leads to a similar quasi-period route to chaos with increases of feedback. In experiments, by using a CFBG with dispersion of 2000ps/nm, the TDS is decreased by 90% to about 0.04 compared with mirror feedback. Furthermore, both numerical and experimental results show that the TDS evolution is quite different: the TDS decreases more quickly down to a lower plateau (even background noise level of autocorrelation function) and never rises again. This evolution tendency is also different from that of FBG feedback, of which the TDS first decreases to a minimal value and then increases again as feedback strength increases. In addition, the CFBG feedback has no filtering effects and does not require amplification for feedback light.
description: 10 pages, 11 figures
Distribution, body size, genetic structure and conservation of Siphlaenigma janae (Insecta: Ephemeroptera)
Creators: name: Pohe, Stephen R.
name: Winterbourn, Michael J.
name: Goldstien, Sharyn J.
name: Harding, Jon S.
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Distribution, body size and genetic structure of the poorly known New Zealand mayfly Siphlaenigma janae were investigated to improve understanding of its conservation status. It has now been recorded from 42 locations, 22 of which are reported for the first time. The distribution of S. janae extends from Northland to the central North Island, and also into the northwestern South Island. Population structure consisted of three distinct haplotype networks; two in the North Island and one in the South Island. Maximum uncorrected genetic distance was 6.1% but no strong evidence for the presence of sibling species was found. The specialist nymphs predominantly live in low-gradient first- and second-order forested streams, a habitat that is increasingly being threatened by land-use modification. We recommend S. janae remain classified as Nationally Vulnerable due to its unique taxonomic position, regionally distinct genetic structure and fragmented population that is likely experiencing ongoing decline.
КРЕАТИВНОЕ ЛИДЕРСТВО КАК ЦЕЛЕВОЙ ОРИЕНТИР ОБРАЗОВАНИЯ В УСЛОВИЯХ ПОСТИНДУСТРИАЛЬНОГО ОБЩЕСТВА
Creators: name: Санникова Анна Илларионовна
name: Пестова Елена Геннадьевна
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: креативность
креативное лидерство
лидерство служения.

description: Рассматривается роль образования в условиях постиндустриального общества и раскрывается понятие креативного лидерства, содержащего в себе потенциал развития возможностей обучающихся с целью стимулирования их субъектности и творческой самореализации в условиях динамично меняющегося социума
A statistical physics approach to learning curves for the Inverse Ising problem
Creators: name: Bachschmid-Romano, Ludovica
name: Opper, Manfred
Publisher: name: arXiv
Year: 2017
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Using methods of statistical physics, we analyse the error of learning couplings in large Ising models from independent data (the inverse Ising problem). We concentrate on learning based on local cost functions, such as the pseudo-likelihood method for which the couplings are inferred independently for each spin. Assuming that the data are generated from a true Ising model, we compute the reconstruction error of the couplings using a combination of the replica method with the cavity approach for densely connected systems. We show that an explicit estimator based on a quadratic cost function achieves minimal reconstruction error, but requires the length of the true coupling vector as prior knowledge. A simple mean field estimator of the couplings which does not need such knowledge is asymptotically optimal, i.e. when the number of observations is much large than the number of spins. Comparison of the theory with numerical simulations shows excellent agreement for data generated from two models with random couplings in the high temperature region: a model with independent couplings (Sherrington-Kirkpatrick model), and a model where the matrix of couplings has a Wishart distribution.
ПРОЕКТНЫЙ ПОДХОД К ФОРМИРОВАНИЮ ОБЩЕПРОФЕССИОНАЛЬНЫХ КОМПЕТЕНЦИЙ
Creators: name: Рожнёва Инга Владимировна
Publisher: name: Вестник Пермского государственного гуманитарно-педагогического университета. Серия № 3. Гуманитарные и общественные науки
Year: 2019
Subjects: проектная деятельность
общепрофессиональные компетенции
социальный проект
социальные инновации
сервис подбора помощников
методологии PDCA.

description: Рассматривается проектный подход как метод обучения, тематическим ядром которого являются социальные инновации