cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Direct Detection of Lyman Continuum Escape from Local Starburst Galaxies with the Cosmic Origins Spectrograph
Creators: name: Leitherer, Claus
name: Hernandez, Svea
name: Lee, Janice C.
name: Oey, M. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report on the detection of Lyman continuum radiation in two nearby starburst galaxies. Tol 0440-381, Tol 1247-232 and Mrk 54 were observed with the Cosmic Origins Spectrograph onboard the Hubble Space Telescopes. The three galaxies have radial velocities of ~13,000 km/s, permitting a ~35 A window on the restframe Lyman continuum shortward of the Milky Way Lyman edge at 912 A. The chosen instrument configuration using the G140L grating covers the spectral range from 912 to 2,000 Å. We developed a dedicated background subtraction method to account for temporal and spatial background variations of the detector, which is crucial at the low flux levels around 912 A. This modified pipeline allowed us to significantly improve the statistical and systematic detector noise and will be made available to the community. We detect Lyman continuum in all three galaxies. However, we conservatively interpret the emission in Tol 0440-381 as an upper limit due to possible contamination by geocoronal Lyman series lines. We determined the current star-formation properties from the far-ultraviolet continuum and spectral lines and used synthesis models to predict the Lyman continuum radiation emitted by the current population of hot stars. We discuss the various model uncertainties such as, among others, atmospheres and evolution models. Lyman continuum escape fractions were derived from a comparison between the observed and predicted Lyman continuum fluxes. Tol 1247-232, Mrk 54 and Tol 0440-381 have absolute escape fractions of (4.5 +/- 1.2)%, (2.5 +/- 0.72)% and
description: Accepted by The Astrophysical Journal
Thermodynamic optimization of an electric circuit as a non-steady energy converter
Creators: name: Valencia-Ortega, G.
name: Arias-Hernandez, L. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Electrical circuits with transient elements can be good examples of systems where non--steady irreversible processes occur, so in the same way as a steady state energy converter, we use the formal construction of the first order irreversible thermodynamic (FOIT) to describe the energetics of these circuits. In this case, we propose an isothermic model of two meshes with transient and passive elements, besides containing two voltage sources (which can be functions of time); this is a non--steady energy converter model. Through the Kirchhoff equations, we can write the circuit phenomenological equations. Then, we apply an integral transformation to linearise the dynamic equations and rewrite them in algebraic form, but in the frequency space. However, the same symmetry for steady states appears (cross effects). Thus, we can study the energetic performance of this converter model by means of two parameters: the "force ratio" and the "coupling degre". Furthermore, it is possible to obtain the characteristic functions (dissipation function, power output, efficiency, etc.). They allow us to establish a simple optimal operation regime of this energy converter. As an example, we obtain the converter behavior for the maximum efficient power regime (MPE).
description: 14 pages and 12 figures, submitted to J. Non-Equilib. Thermodyn
Maximizing the hyperpolarizability of 1D potentials with multiple electrons
Creators: name: Burke, Christopher J.
name: Lesnefsky, Joseph
name: Petschek, Rolfe G.
name: Atherton, Timothy J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We optimize the first and second intrinsic hyperpolarizabilities for a 1D piecewise linear potential dressed with Dirac delta functions for $N$ non-interacting electrons. The optimized values fall rapidly for $N>1$, but approach constant values of $β_{int}=0.40$, $γ_{int}^{+}=0.16$ and $γ_{int}^{-}=-0.061$ above $N\gtrsim8$. These apparent bounds are achieved with only 2 parameters with more general potentials achieving no better value. In contrast to previous studies, analysis of the hessian matrices of $β_{int}$ and $γ_{int}$ taken with respect to these parameters shows that the eigenvectors are well aligned with the basis vectors of the parameter space, indicating that the parametrization was well-chosen. The physical significance of the important parameters is also discussed.
description: 14 pages, 5 figures
title: Эффективность использования сорбентов для веществ липидной природы
Creators: name: Андреева, Лариса
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Сорбенты нашли широкое применение в процессах очистки воды, детоксикации живых организмов, обезвреживании различных сред. В работе изучалась эффективность использования традиционных сорбентов для извлечения веществ липидной природы из многокомпонентных смесей. Эксперимент проводился в лаборатории биохимии Новгородского государственного университета имени Ярослава Мудрого. Исследования
показали, что процессы сорбции с использованием активированного угля, полифепана и энтеросгеля имеют различный характер в отношении липидов. Сорбция активно протекает в течение шестидесяти минут от момента начала процесса.
Decentralized Strongly-Convex Optimization with Affine Constraints: Primal and Dual Approaches
Creators: name: Rogozin, Alexander
name: Yarmoshik, Demyan
name: Kopylova, Ksenia
name: Gasnikov, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Decentralized optimization is a common paradigm used in distributed signal processing and sensing as well as privacy-preserving and large-scale machine learning. It is assumed that several computational entities locally hold objective functions and are connected by a network. The agents aim to commonly minimize the sum of the local objectives subject by making gradient updates and exchanging information with their immediate neighbors. Theory of decentralized optimization is pretty well-developed in the literature. In particular, it includes lower bounds and optimal algorithms. In this paper, we assume that along with an objective, each node also holds affine constraints. We discuss several primal and dual approaches to decentralized optimization problem with affine constraints.
H+/K+ ATPase T cell autoepitopes in gastric autoimmunity
Creators: name: de Silva., Harini Dishani
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Splitting of proton-antiproton directed flow in relativistic heavy-ion collisions
Creators: name: Bozek, Piotr
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The rapidity dependent directed flow of particles produced in a relativistic heavy ion collision can be generated in the hydrodynamic expansion of a tilted source. The asymmetry of the pressure leads to a build up of a directed flow of matter with respect to the collision axis. The experimentally observed ordering of the directed flow of baryons, pions and antibaryons can be described as resulting from the expansion of a baryon inhomogeneous fireball. An uneven distribution of baryons in the transverse plane leads to an asymmetry in the collective push for protons and antiprotons. Precise measurements of the collective flow as a function of rapidity could serve as a strong constraint on mechanism of baryon stopping in the early phase of the collision.
title: Teaching, assessing and operational sustainability in UCL's chemical engineering capstone design project
Creators: name: Nayak-Luke, R.
name: Odunsi, A.
name: Badmos, S.
name: Pollock, M.
Publisher: name: University of Strathclyde
Year: 2022

description: Sustainability is meeting the needs of the present without compromising the future, as set out in the UN sustainable development goals. This paper outlines how sustainability is embedded both technically in the various aspects of the UCL third-year chemical engineering capstone design project, and in the design, delivery, and assessment of the module. The project brief necessitates the consideration of the environmental impact of the design in a manner consistent with that set out by professional bodies such as the IChemE. In the delivery of the module, learners engage in individual and collaborative learning, undertake formative assessments, provide, and receive formative feedback and are empowered to practise sustainable self-learning. Sustainable assessment is promoted using a single rubric that allows learners and educators to gain familiarity with course expectations, ensures consistency in feedback given in summative assessments and enables learners to attain higher levels in the rubric in subsequent submissions. Sustainable delivery and self-learning allow both learners and educators to develop skillsets relevant to their career development. Learners’ perspectives showed the majority of learners were aware of the importance of sustainability, felt empowered for future self-learning and felt that they applied their knowledge of sustainability, although they highlighted sections where this could be clearer. Reflecting on this, educators could signpost more clearly how sustainability informs technical decisions in these sections, while being mindful of balancing this with giving learners challenging yet achievable projects within the constraints of delivering the module and meeting all learning outcomes.
title: Поиск генов-кандидатов селекционно-значимых признаков свиней на основе полногеномного генотипирования
Creators: name: Романец, Елена Андреевна
name: Колосова, Мария Анатольевна
name: Романец, Тимофей Сергеевич
name: Гетманцева, Любовь Владимировна
Publisher: name: ФГБНУ КНЦЗВ
Year: 2022

description: Проведены исследования генома свиней на основе данных полногеномного генотипи-рования свиноматок крупной белой породы с 2013–2019 года рождения. Общая выборка со-ставила 627 голов. Получены новые данные об областях отбора («подписях селекции») в ге-номе свиней крупной белой породы, и определены гены-кандидаты, прямо или косвенно свя-занные с селекционно-значимыми признаками. Преимущество исследований на основе «под-писей селекции» заключается в том, что они не зависят от информации о фенотипе отдель-ных животных и применимы к относительно небольшим исследуемым популяциям.
From strong to weak coupling in holographic models of thermalization
Creators: name: Grozdanov, Sašo
name: Kaplis, Nikolaos
name: Starinets, Andrei O.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the analytic structure of thermal energy-momentum tensor correlators at large but finite coupling in quantum field theories with gravity duals. We compute corrections to the quasinormal spectra of black branes due to the presence of higher derivative $R^2$ and $R^4$ terms in the action, focusing on the dual to $\mathcal{N}=4$ SYM theory and Gauss-Bonnet gravity. We observe the appearance of new poles in the complex frequency plane at finite coupling. The new poles interfere with hydrodynamic poles of the correlators leading to the breakdown of hydrodynamic description at a coupling-dependent critical value of the wave-vector. The dependence of the critical wave vector on the coupling implies that the range of validity of the hydrodynamic description increases monotonically with the coupling. The behavior of the quasinormal spectrum at large but finite coupling may be contrasted with the known properties of the hierarchy of relaxation times determined by the spectrum of a linearized kinetic operator at weak coupling. We find that the ratio of a transport coefficient such as viscosity to the relaxation time determined by the fundamental non-hydrodynamic quasinormal frequency changes rapidly in the vicinity of infinite coupling but flattens out for weaker coupling, suggesting an extrapolation from strong coupling to the kinetic theory result. We note that the behavior of the quasinormal spectrum is qualitatively different depending on whether the ratio of shear viscosity to entropy density is greater or less than the universal, infinite coupling value of $\hbar/4πk_B$. In the former case, the density of poles increases, indicating a formation of branch cuts in the weak coupling limit, and the spectral function shows the appearance of narrow peaks. We also discuss the relation of the viscosity-entropy ratio to conjectured bounds on relaxation time in quantum systems.
description: V2: 53 pages, 31 figures. References added
The Cosmic Graph: Optimal Information Extraction from Large-Scale Structure using Catalogues
Creators: name: Makinen, T. Lucas
name: Charnock, Tom
name: Lemos, Pablo
name: Porqueres, Natalia
name: Heavens, Alan
name: Wandelt, Benjamin D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present an implicit likelihood approach to quantifying cosmological information over discrete catalogue data, assembled as graphs. To do so, we explore cosmological parameter constraints using mock dark matter halo catalogues. We employ Information Maximising Neural Networks (IMNNs) to quantify Fisher information extraction as a function of graph representation. We a) demonstrate the high sensitivity of modular graph structure to the underlying cosmology in the noise-free limit, b) show that graph neural network summaries automatically combine mass and clustering information through comparisons to traditional statistics, c) demonstrate that networks can still extract information when catalogues are subject to noisy survey cuts, and d) illustrate how nonlinear IMNN summaries can be used as asymptotically optimal compressed statistics for Bayesian simulation-based inference. We reduce the area of joint $Ω_m, σ_8$ parameter constraints with small ($\sim$100 object) halo catalogues by a factor of 42 over the two-point correlation function, and demonstrate that the networks automatically combine mass and clustering information. This work utilises a new IMNN implementation over graph data in Jax, which can take advantage of either numerical or auto-differentiability. We also show that graph IMNNs successfully compress simulations away from the fiducial model at which the network is fitted, indicating a promising alternative to n-point statistics in catalogue simulation-based analyses.
description: 16 pages, 10 figures. Accepted to the Open Journal of Astrophysics. We provide code and a tutorial for the analysis and relevant software at https://github.com/tlmakinen/cosmicGraphs
Measuring mobility and the effects of exercise for older acute medical patients
Creators: name: de Morton., Natalie
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Who Ordered This?: Exploiting Implicit User Tag Order Preferences for Personalized Image Tagging
Creators: name: Nwana, Amandianeze O.
name: Chen, Tsuhan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: Human-Computer Interaction (cs.HC)
subject: Multimedia (cs.MM)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: What makes a person pick certain tags over others when tagging an image? Does the order that a person presents tags for a given image follow an implicit bias that is personal? Can these biases be used to improve existing automated image tagging systems? We show that tag ordering, which has been largely overlooked by the image tagging community, is an important cue in understanding user tagging behavior and can be used to improve auto-tagging systems. Inspired by the assumption that people order their tags, we propose a new way of measuring tag preferences, and also propose a new personalized tagging objective function that explicitly considers a user's preferred tag orderings. We also provide a (partially) greedy algorithm that produces good solutions to our new objective and under certain conditions produces an optimal solution. We validate our method on a subset of Flickr images that spans 5000 users, over 5200 tags, and over 90,000 images. Our experiments show that exploiting personalized tag orders improves the average performance of state-of-art approaches both on per-image and per-user bases.
The Influence of Thin Film Confinement on Surface Plasticity in Polystyrene and Poly(2-vinylpyridine) Homopolymer and Block Copolymer Films
Creators: name: Gurmessa, Bekele J.
name: Croll, Andrew B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Thin block copolymer films have attracted considerable academic attention because of their ability to self-assemble into various microstructures, many of which have potential technological applications. Despite the ongoing interest, little effort has focused on the onset of plasticity and failure which are important factors for the eventual adoption of these materials. Here we use delamination to impart a quantifiable local stain on thin films of homopolymer polystyrene and poly(2-vinylpyridine), as well as block copolymers made of styrene and 2-vinylpyridine. Direct observation of the damage caused by bending with atomic force microscopy and laser scanning confocal microscopy, leads to the identification of a critical strain for the onset of plasticity. Moving beyond our initial scaling analysis, the more quantitative analysis presented here shows strain levels for thick films to be comparable to bulk measurements. Monitoring the critical strain leads to several observations: 1.) as-cast PS-P2VP has low critical strain, 2.) annealing slowly increases critical strain as microstructural ordering takes place, and 3.) similar to the homopolymer, both as cast and ordered films both show increasing critical strain under confinement.
description: 12 pages, 9 figures
Image and Model Transformation with Secret Key for Vision Transformer
Creators: name: Kiya, Hitoshi
name: Iijima, Ryota
name: Aprilpyone, MaungMaung
name: Kinoshita, Yuma
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In this paper, we propose a combined use of transformed images and vision transformer (ViT) models transformed with a secret key. We show for the first time that models trained with plain images can be directly transformed to models trained with encrypted images on the basis of the ViT architecture, and the performance of the transformed models is the same as models trained with plain images when using test images encrypted with the key. In addition, the proposed scheme does not require any specially prepared data for training models or network modification, so it also allows us to easily update the secret key. In an experiment, the effectiveness of the proposed scheme is evaluated in terms of performance degradation and model protection performance in an image classification task on the CIFAR-10 dataset.
description: 10 pages, 5 figures
On the polar decomposition of right linear operators in quaternionic Hilbert spaces
Creators: name: Ramesh, G.
name: Kumar, P. Santhosh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Functional Analysis (math.FA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 47S10, 35P05

description: In this article we prove the existence of the polar decomposition for densely defined closed right linear operators in quaternionic Hilbert spaces: If $T$ is a densely defined closed right linear operator in a quaternionic Hilbert space $H$, then there exists a partial isometry $U_{0}$ such that $T = U_{0}|T|$. In fact $U_{0}$ is unique if $N(U_{0}) = N(T)$. In particular, if $H$ is separable and $U$ is a partial isometry with $T = U|T|$, then we prove that $U = U_{0}$ if and only if either $N(T) = \{0\}$ or $R(T)^{\bot} = \{0\}$.
description: 17 pages
title: Биоактивные метаболиты экстрактов суспензионной культуры Ginkgo biloba L. как перспективные кандидаты-кардиопротекторы
Creators: name: Веснина, Анна
name: Чаплыгина, Ольга
name: Долганюк, Вячеслав
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Гинкго двулопастный – растение, богатый источник биологически активных веществ (БАВ), проявляющих антиоксидантные, противовоспалительные и прочие свойства, позволяющие отнести данные БАВ к кардиопротекторам. Следовательно, перспективно получать пищевые добавки (БАД), функциональные продукты питания (ФПП)для профилактики сердечно-сосудистых заболеваний (в частности атеросклероза). Но для сохранения биоразнообразия данного растения актуально использовать биотехнологические методы культивирования клеток растения invitro.
Motif structures involved in receptor-ligand interactions in haemostasis and inflammation
Creators: name: De Luca., Mariagrazia
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Optical Field Recovery in Jones Space
Creators: name: Wu, Qi
name: Zhu, Yixiao
name: Jiang, Hexun
name: Zhuge, Qunbi
name: Hu, Weisheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Optical full-field recovery makes it possible to compensate for fiber impairments such as chromatic dispersion and polarization mode dispersion (PMD) in the digital signal processing. For cost-sensitive short-reach optical networks, some advanced single-polarization (SP) optical field recovery schemes are recently proposed to avoid chromatic dispersion-induced power fading effect, and improve the spectral efficiency for larger potential capacity. Polarization division multiplexing (PDM) can further double both the spectral efficiency and the system capacity of these SP carrier-assisted direct detection (DD) schemes. However, the so-called polarization fading phenomenon induced by random polarization rotation is a fundamental obstacle which prevents SP carrier-assisted DD systems from polarization diversity. In this paper, we propose a receiver of Jones-space field recovery (JSFR) to realize polarization diversity with SP carrier-assisted DD schemes in Jones space. Different receiver structures and simplified recovery procedures for JSFR are explored theoretically. The proposed JSFR pushes the SP DD schemes towards PDM without extra optical signal-to-noise ratio (OSNR) penalty. In addition, the JSFR shows good tolerance to PMD since the optical field recovery is conducted before polarization recovery. In the concept-of-proof experiment, we demonstrate 448-Gb/s reception over 80-km single-mode fiber using the proposed JSFR based on 22 couplers. Furthermore, we qualitatively compare the optical field recovery in Jones space and Stokes space from the perspective of the modulation dimension. Qualitatively, we compare the optical field recovery in the Jones space and Stokes space from the perspective of the modulation dimension.
description: 8 pages and 9 figures
A 4096 channel event-based multielectrode array with asynchronous outputs compatible with neuromorphic processors
Creators: name: Cartiglia, Matteo
name: Costa, Filippo
name: Narayanan, Shyam
name: Bui, Cat Vu Huu
name: Ulusan, Hasan
name: Risi, Nicoletta
name: Haessig, Germain
name: Hierlemann, Andreas
name: Cardes Garcia, Fernando
name: Indiveri, Giacomo
Publisher: name: ETH Zurich
Year: 2023

description: Bio-signal sensing represents a pivotal domain in the medical applications of bioelectronics. Traditional methods have, so far, focused on capturing these signals as accurately as possible, leading to high sampling rates in clocked synchronous architectures. Given the sparse activity of bio-signals, this approach often results in large amounts of digitized data with no relevant information and in a significant amount of energy consumed during transmission. Here, we introduce a self-clocked microelectrode array (MEA) that senses and digitizes bio-signals at the pixel level by encoding their changes as asynchronous digital address-events, significantly reducing the amount of data that needs to be transmitted off-chip. This novel MEA comprises an array of 64 × 64 electrodes, an asynchronous 2D-arbiter, and an Address-Event Representation (AER) communication block. Each pixel within the array operates autonomously, monitoring input signals for relative voltage fluctuations instigated by cellular activity. Upon detecting a sufficiently large signal change, the pixel produces a digital pulse encoded with its corresponding address. Positive signal changes are encoded as “up” events, while negative ones are encoded as “down” events and, upon generation, are routed off-chip instantly via the asynchronous arbiter. Here, we present results from the chip characterization and experimental measurements using electrogenic cells. Moreover, we interface the MEA to a mixed-signal neuromorphic processor, demonstrating a prototype for end-to-end event-based bio-signal sensing and processing.
description: Research Square
description: ISSN:2693-5015
Twistronics of Janus transition metal dichalcogenide bilayers
Creators: name: Angeli, Mattia
name: Schleder, Gabriel R.
name: Kaxiras, Efthimios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Twisted multilayers of two-dimensional (2D) materials are an increasingly important platform for investigating quantum phases of matter, and in particular, strongly correlated electrons. The moiré pattern introduced by the relative twist between layers creates effective potentials of long-wavelength, leading to electron localization. However, in contrast to the abundance of 2D materials, few twisted heterostructures have been studied until now. Here we develop a first-principle continuum theory to study the electronic bands introduced by moire patterns of twisted Janus transition metal dichalcogenides (TMD) homo- and hetero-bilayers. The model includes lattice relaxation, stacking-dependent effective mass, and Rashba spin-orbit coupling. We then perform a high-throughput generation and characterization of DFT-extracted continuum models for more than a hundred possible combinations of materials and stackings. Our model predicts that the moiré physics and emergent symmetries depend on chemical composition, vertical layer orientation, and twist angle, so that the minibands wavefunctions can form triangular, honeycomb, and Kagome networks. Rashba spin-orbit effects, peculiar of these systems, can dominate the moiré bandwidth at small angles. Our work enables the detailed investigation of Janus twisted heterostructures, allowing the discovery and control of novel electronic phenomena.
Studies on the genetic organisation of the rfb loci of Leptospira interrogans serovars
Creators: name: de la Peña-Moctezuma., Alejandro
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Climate Response and Sensitivity: Timescales and Late Tipping Points
Creators: name: Bastiaansen, Robbin
name: Ashwin, Peter
name: von der Heydt, Anna S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Climate response metrics are used to quantify the Earth's climate response to anthropogenic changes of atmospheric CO2. Equilibrium Climate Sensitivity (ECS) is one such metric that measures the equilibrium response to CO2 doubling. However, both in their estimation and their usage, such metrics make assumptions on the linearity of climate response, although it is known that, especially for larger forcing levels, response can be nonlinear. Such nonlinear responses may become visible immediately in response to a larger perturbation, or may only become apparent after a long transient. In this paper, we illustrate some potential problems and caveats when estimating ECS from transient simulations. We highlight ways that very slow timescales may lead to poor estimation of ECS even if there is seemingly good fit to linear response over moderate timescales. Moreover, such slow timescale might lead to late abrupt responses ("late tipping points") associated with a system's nonlinearities. We illustrate these ideas using simulations on a global energy balance model with dynamic albedo. We also discuss the implications for estimating ECS for global climate models, highlighting that it is likely to remain difficult to make definitive statements about the simulation times needed to reach an equilibrium.
description: 27 pages, 14 figures
Evidence for a novel shift-symmetric universality class from the functional renormalization group
Creators: name: Laporte, Cristobal
name: Locht, Nora
name: Pereira, Antonio D.
name: Saueressig, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Wetterich's equation provides a powerful tool for investigating the existence and universal properties of renormalization group fixed points exhibiting quantum scale invariance. Motivated by recent works on asymptotically safe scalar-tensor theories, we develop a novel approximation scheme which projects the functional renormalization group equation onto functions of the kinetic term. Applying this projection to scalars and gauge fields, our analysis identifies a new universality class with a very special spectrum of stability coefficients. The implications of our findings in the context of asymptotically safe gravity-matter systems are discussed.
description: 10 pages, 3 figures
Beamforming Errors in Murchison Widefield Array Phased Array Antennas and their effects on Epoch of Reionization Science
Creators: name: Neben, A. R.
name: Hewitt, J. N.
name: Bradley, R. F.
name: Dillon, J. S.
name: Bernardi, G.
name: Bowman, J. D.
name: Briggs, F.
name: Cappallo, R. J.
name: Corey, B. E.
name: Deshpande, A. A.
name: Goeke, R.
name: Greenhill, L. J.
name: Hazelton, B. J.
name: Johnston-Hollitt, M.
name: Kaplan, D. L.
name: Lonsdale, C. J.
name: McWhirter, S. R.
name: Mitchell, D. A.
name: Morales, M. F.
name: Morgan, E.
name: Oberoi, D.
name: Ord, S. M.
name: Prabu, T.
name: Shankar, N. Udaya
name: Srivani, K. S.
name: Subrahmanyan, R.
name: Tingay, S. J.
name: Wayth, R. B.
name: Webster, R. L.
name: Williams, A.
name: Williams, C. L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Accurate antenna beam models are critical for radio observations aiming to isolate the redshifted 21cm spectral line emission from the Dark Ages and the Epoch of Reionization and unlock the scientific potential of 21cm cosmology. Past work has focused on characterizing mean antenna beam models using either satellite signals or astronomical sources as calibrators, but antenna-to-antenna variation due to imperfect instrumentation has remained unexplored. We characterize this variation for the Murchison Widefield Array (MWA) through laboratory measurements and simulations, finding typical deviations of order +/- 10-20% near the edges of the main lobe and in the sidelobes. We consider the ramifications of these results for image- and power spectrum-based science. In particular, we simulate visibilities measured by a 100m baseline and find that using an otherwise perfect foreground model, unmodeled beamforming errors severely limit foreground subtraction accuracy within the region of Fourier space contaminated by foreground emission (the "wedge"). This region likely contains much of the cosmological signal, and accessing it will require measurement of per-antenna beam patterns. However, unmodeled beamforming errors do not contaminate the Fourier space region expected to be free of foreground contamination (the "EOR window"), showing that foreground avoidance remains a viable strategy.
description: Accepted to ApJ
title: Моделирование взаимодействия лекарственных средств с биологической мишенью на примере производных бензоксазола
Creators: name: Исаков, Владимир
name: Нумерицкая, Катерина
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Поиск, разработка, клиническая апробация и внедрение в практическое здравоохранение новых лекарственных средств является одной из актуальных и приоритетных задач современного здравоохранения. В настоящее время основным трендом по разработке новых лекарственных средств и биологически активных веществ является изучение возможного взаимодействия биомолекул методами квантово-химического моделирования. Используя методы квантово-химического моделирования, установлено, что введение различных по природе заместителей в структуру молекул бензоксазола приводит к перераспределению электронной плотности и дипольного момента в молекулах производных бензоксазола, что оказывает влияние на способность данных соединений к взаимодействию с биологическими мишенями.
The role of Cu/Zn-superoxide dismutase, glutathione peroxidase and catalase in development, down syndrome and aging
Creators: name: de Haan-Klein., Judy B.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: Определение хронической токсичности адаптогенного препарата на лабораторных животных
Creators: name: Рудь, Екатерина Николаевна
name: Кузьминова, Елена Васильевна
name: Семененко, Ксения Андреевна
Publisher: name: ФГБНУ КНЦЗВ
Year: 2022

description: В статье представлены материалы по определению хронической токсичности адапто-генного препарата флавобетин на лабораторных животных. Результаты проведенных иссле-дований показали, что при длительном применении флавобетина нелинейным крысам в до-зах, составляющих 1/10 и 1/20 от максимально введенной дозы в остром опыте (0,66 и 0,33 г/кг массы тела) не выявлено его токсического действия на организм лабораторных живот-ных. При этом флавобетин оказывает положительное влияние на ряд показателей крови, стимулируя эритропоэз и белковый обмен, проявляет ростостимулирующее действие.
Relationship between Successive Flares in the Same Active Region and Space-Weather HMI Active Region Patch (SHARP) Parameters
Creators: name: Ran, Hao
name: Liu, Ying D.
name: Guo, Yang
name: Wang, Rui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A solar active region (AR) may produce multiple notable flares during its passage across the solar disk. We investigate successive flares from flare-eruptive active regions, and explore their relationship with solar magnetic parameters. We examine six ARs in this study, each with at least one major flare above X1.0. The Space-Weather HMI Active Region Patch (SHARP) is employed in this study to parameterize the ARs. We aim to identify the most flare-related SHARP parameters and lay foundation for future practical flare forecasts. We first evaluate the correlation coefficients between the SHARP parameters and the successive flare production. Then we adopt a Natural Gradient Boost (NGBoost) method to analyze the relationship between the SHARP parameters and the successive flare bursts. Based on the correlation analysis and the importance distribution returned from NGBoost, we select 8 most flare-related SHARP parameters. Finally, we discuss the physical meanings of the 8 selected parameters and their relationship with flare production.
description: 18 pages; 9 figures; Accepted for publication in ApJ
Anti-atherogenic actions of thiazolidinediones on human vascular smooth muscle cells
Creators: name: de Dios., Stephanie Tolentino
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: Towards learning robots in surgery: First experience with a cognition-guided camera-robot in laparoscopy
Creators: name: Mietkowski, Patrick
name: Wagner, Martin
name: Bihlmaier, Andreas
name: Bodenstedt, Sebastian
name: Speidel, Stefanie
name: Wörn, Heinz
name: Müller, Beat Peter
name: Kenngott, Hannes Götz
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Background: Nowadays, surgery suffers from limited personnel resources and camera guidance in laparoscopic surgery is frequently performed by inexperienced surgical members of staff. Both may have a negative effect on the quality of surgery and the outcome of the patient. So research into camera guiding[for full text, please go to the a.m. URL]
description: 133. Kongress der Deutschen Gesellschaft für Chirurgie
Scalable boson sampling with a single-photon device
Creators: name: He, Yu
name: Su, Zu-En
name: Huang, He-Liang
name: Ding, Xing
name: Qin, Jian
name: Wang, Can
name: Unsleber, S.
name: Chen, Chao
name: Wang, Hui
name: He, Yu-Ming
name: Wang, Xi-Lin
name: Schneider, Christian
name: Kamp, Martin
name: Höfling, Sven
name: Lu, Chao-Yang
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Boson sampling is a problem intractable for classical computers, but can be naturally solved on a specialized photonic quantum simulator which requires less resources than building a universal quantum computer. The biggest challenge to implement boson sampling with a large number of photons has been the lack of reliable single-photon sources. Here we demonstrate a scalable architecture of boson sampling using a solid-state single-photon source with simultaneously high efficiency, purity, and indistinguishability. The single photons are time-bin encoded and interfered in an electrically programmable loop-based network. We implement and validate boson sampling with input three and four single photons, and track the dynamical multi-photon evolution inside the circuit. With further refinement of the system efficiency, our approach may be feasible to be scaled up to >20-boson sampling to outperform classical computers, and thus provide experimental evidence against the Extended Church-Turing Thesis.
description: 12 pages, 4 figures, additional references added
title: Теоретические подходы развития пчеловодства в климатических условиях Новгородской области
Creators: name: Кондратьева, Татьяна
name: Мануриков, Яков
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Изучая различные породы пчел для средней полосы России, необходимо обращать пристальное внимание на их устойчивость к низким температурам и приспособленности к тем или иным климатическим условиям. Для того, чтобы разведение пчелосемей стало для начинающего пчеловода успешным занятием, необходимо тщательно
подойти к выбору главных производителей меда – пчел. Покупая пчелосемью, нужно принимать во внимание особенности той или иной породы. Название породы содержит прямое указание к климатическим условиям, в которых они будут наиболее продуктивны: для среднерусской – холодный, теплый для кавказской и т. д.
Revisiting the dynamic of Q-deformed logistic maps
Creators: name: Cánovas, Jose S.
name: Rezgui, Houssem Eddine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B05, 37E99, 37B40

description: We consider the logistic family and apply the $q$-deformation $ϕ_q(x)=\frac{1-q^x}{1-q}$. We study the stability regions of the fixed points of the $q$-deformed logistic map and the regions where the dynamic is complex through topological entropy and Lyapunov exponents. Our results show that the dynamic of this deformed family is richer than that of the $q$-deformed family studied in [8].
description: 23 pages, 52 figure
QUOTE: "Querying" Users as Oracles in Tag Engines - A Semi-Supervised Learning Approach to Personalized Image Tagging
Creators: name: Nwana, Amandianeze O.
name: Chen, Tsuhan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: One common trend in image tagging research is to focus on visually relevant tags, and this tends to ignore the personal and social aspect of tags, especially on photoblogging websites such as Flickr. Previous work has correctly identified that many of the tags that users provide on images are not visually relevant (i.e. representative of the salient content in the image) and they go on to treat such tags as noise, ignoring that the users chose to provide those tags over others that could have been more visually relevant. Another common assumption about user generated tags for images is that the order of these tags provides no useful information for the prediction of tags on future images. This assumption also tends to define usefulness in terms of what is visually relevant to the image. For general tagging or labeling applications that focus on providing visual information about image content, these assumptions are reasonable, but when considering personalized image tagging applications, these assumptions are at best too rigid, ignoring user choice and preferences. We challenge the aforementioned assumptions, and provide a machine learning approach to the problem of personalized image tagging with the following contributions: 1.) We reformulate the personalized image tagging problem as a search/retrieval ranking problem, 2.) We leverage the order of tags, which does not always reflect visual relevance, provided by the user in the past as a cue to their tag preferences, similar to click data, 3.) We propose a technique to augment sparse user tag data (semi-supervision), and 4.) We demonstrate the efficacy of our method on a subset of Flickr images, showing improvement over previous state-of-art methods.
Red, Straight, no bends: primordial power spectrum reconstruction from CMB and large-scale structure
Creators: name: Ravenni, Andrea
name: Verde, Licia
name: Cuesta, Antonio J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: 85A40

description: We present a minimally parametric, model independent reconstruction of the shape of the primordial power spectrum. Our smoothing spline technique is well-suited to search for smooth features such as deviations from scale invariance, and deviations from a power law such as running of the spectral index or small-scale power suppression. We use a comprehensive set of the state-of the art cosmological data: {\it Planck} observations of the temperature and polarisation anisotropies of the cosmic microwave background, WiggleZ and Sloan Digital Sky Survey Data Release 7 galaxy power spectra and the Canada-France-Hawaii Lensing Survey correlation function. This reconstruction strongly supports the evidence for a power law primordial power spectrum with a red tilt and disfavours deviations from a power law power spectrum including small-scale power suppression such as that induced by significantly massive neutrinos. This offers a powerful confirmation of the inflationary paradigm, justifying the adoption of the inflationary prior in cosmological analyses.
description: 17 pages, 10 figures
More can be better: An analysis of single-mutant fixation probability functions under $2\times2$ games
Creators: name: Pires, Diogo L.
name: Broom, Mark
Publisher: name: arXiv
Year: 2022
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Evolutionary game theory has proved to be a powerful tool to probe the self-organisation of collective behaviour by considering frequency-dependent fitness in evolutionary processes. It has shown that the stability of a strategy depends not only on the payoffs received after each encounter but also on the population's size. Here, we study $2\times2$ games in well-mixed finite populations by analysing the fixation probabilities of single mutants as functions of population size. We proved that 9 out of the 24 possible games always lead to monotonically decreasing functions, similarly to fixed fitness scenarios. However, fixation functions showed increasing regions under 12 distinct anti-coordination, coordination, and dominance games. Perhaps counter-intuitively, this establishes that single-mutant strategies often benefit from being in larger populations. Fixation functions that increase from a global minimum to a positive asymptotic value are pervasive but may have been easily concealed by the weak selection limit. We obtained sufficient conditions to observe fixation increasing for small populations and three distinct ways this can occur. Finally, we describe fixation functions with increasing regions bounded by two extremes under intermediate population sizes. We associate their occurrence with transitions from having one global extreme to other shapes.
description: 23 pages, 8 figures