cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on $τ_\mathrm{NL}$ from Planck temperature and polarization
Creators: name: Marzouk, Kareem
name: Lewis, Antony
name: Carron, Julien
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We update constraints on the amplitude of the primordial trispectrum, using the final Planck mission temperature and polarization data. In the squeezed limit, a cosmological local trispectrum would be observed as a spatial modulation of small-scale power on the CMB sky. We reconstruct this signal as a source of statistical anisotropy via quadratic estimator techniques. We systematically demonstrate how the estimated power spectrum of a reconstructed modulation field can be translated into a constraint on $τ_\mathrm{NL}$ via likelihood methods, demonstrating the procedures effectiveness by inferring known $τ_\mathrm{NL}$ signal(s) from simulations. Our baseline results constrain $τ_\mathrm{NL} < 1700$ at the 95\% confidence level, providing the most stringent constraints to date.
Indices of O-regular variation for weight functions and weight sequences
Creators: name: Jiménez-Garrido, Javier
name: Sanz, Javier
name: Schindl, Gerhard
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 26A12, Secondary 26A48, 44A15, 46E10, 46E30

description: A plethora of spaces in Functional Analysis (Braun-Meise-Taylor and Carleman ultradifferentiable and ultraholomorphic classes; Orlicz, Besov, Lipschitz, Lebesque spaces, to cite the main ones) are defined by means of a weighted structure, obtained from a weight function or sequence subject to standard conditions entailing desirable properties (algebraic closure, stability under operators, interpolation, etc.) for the corresponding spaces. The aim of this paper is to stress or reveal the true nature of these diverse conditions imposed on weights, appearing in a scattered and disconnected way in the literature: they turn out to fall into the framework of O-regular variation, and many of them are equivalent formulations of one and the same feature. Moreover, we study several indices of regularity/growth for both functions and sequences, which allow for the rephrasing of qualitative properties in terms of quantitative statements.
description: 37 pages
New classification parameter of solar flares based on the maximum flux in soft X-rays and on duration of flare
Creators: name: Bruevich, Elena
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar flare activity is characterised by different classification systems, both in optical and X-ray ranges. The most generally accepted classifications of solar flares describe important parameters of flares such as the maximum of brightness of the flare in the in optical range - $H_α$ flare class (change from F to B), area of the flare in $H_α$ (change from S for areas less than 2 square degrees to 4 for areas more than 24.7 square degrees) and the maximum amplitude of the soft X-ray (SXR-flux) in the band 0.1 -- 0.8 nm ($F_{0.1-0.8}^{max}$) -- X-ray flares of classes from C to X. A new classification parameter of solar flares is proposed here -- the X-ray index of flare XI, based on GOES measurements of solar radiation in the SXR-range. The XI-index has a clear physical interpretation associated with the total flare energy in the SXR-range. XI is easily calculated for each flare with use of available GOES data. The XI-index can be used along with other geoeffective parameters of Solar activity to assess both flares and Coronal mass ejections (CMEs ) that are connected with them.
description: 29 pages, 17 figures
Quantum Scattering Theory of Spin Transfer Torque, Spin Pumping and Fluctuations
Creators: name: Brataas, Arne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin transfer torque and spin pumping are central reciprocal phenomena in spintronics. These phenomena occur in hybrid systems of normal metals and magnets. Spin transfer is the conversion of spin currents in metals to a torque on the magnetization of magnets. Spin pumping is the emission of spin currents from precessing magnets. Here, we demonstrate a general way to understand these effects within a quantum out-of-equilibrium path-integral model. Our results agree with known expressions for spin transfer and spin pumping in terms of transverse (mixing) conductances when there are no fluctuations. However, at a finite temperature, frequency or spin accumulation, the magnet also experiences fluctuating torques. In the classical regime, when the thermal energy is larger than the bias voltage and precession frequency, we reproduce the classical Brownian-Langevin forces associated with spin transfer and spin pumping. At low temperatures, in the quantum regime, we demonstrate that magnetization fluctuations differ in the elastic and inelastic electron transport regimes. Furthermore, we show how additional transport coefficients beyond the mixing conductance govern the fluctuations. Some of these coefficients are related to electron shot noise because of the discrete spin angular momentum of electrons. We estimate the fluctuation coefficients of clean, tunnel, and disordered junctions and in the case of an insulating magnet. Our results open a path for exploring low-temperature magnetization dynamics and spin caloritronics.
description: 22 pages, 1 figure
On the extension of Whitney ultrajets, II
Creators: name: Rainer, Armin
name: Schindl, Gerhard
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We characterize the validity of the Whitney extension theorem in the ultradifferentiable Roumieu setting with controlled loss of regularity. Specifically, we show that in the main Theorem 1.3 of [15] condition (1.3) can be dropped. Moreover, we clarify some questions that remained open in [15].
description: 11 pages; minor corrections; accepted for publication in Studia Math
The developing foetal lung : a morphological study of nervous and hormonal manipulations
Creators: name: Hansen, Ian.
Publisher: name: Monash University
Year: 2022

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.
Improved Dynamical Constraints on the Mass of the central Black Hole in NGC 404
Creators: name: Nguyen, Dieu D.
name: Seth, Anil C.
name: Brok, Mark den
name: Neumayer, Nadine
name: Cappellari, Michele
name: Barth, Aaron J.
name: Caldwell, Nelson
name: Williams, Benjamin F.
name: Binder, Breanna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the nucleus of the nearby 10$^9M_{\odot}$~early-type galaxy (ETGs), NGC~404, using Hubble Space Telescope (HST)/STIS spectroscopy and WFC3 imaging. We first present evidence for nuclear variability in UV, optical, and infrared filters over a time period of 15~years. This variability adds to the already substantial evidence for an accreting black hole at the center of NGC~404. We then redetermine the dynamical black hole mass in NGC~404 including modeling of the nuclear stellar populations. We combine HST/STIS spectroscopy with WFC3 images to create a local color-$M/L$~relation derived from stellar population modeling of the STIS data. We then use this to create a mass model for the nuclear region. We use Jeans modeling to fit this mass model to adaptive optics (AO) stellar kinematic observations from Gemini/NIFS. From our stellar dynamical modeling, we find a 3$σ$ upper limit on the black hole mass of $1.5\times10^5M_{\odot}$. Given the accretion evidence for a black hole, this upper limit makes NGC~404 the lowest mass central black hole with dynamical mass constraints. We find that the kinematics of H$_2$ emission line gas show evidence for non-gravitational motions preventing the use of gas dynamical modeling to constrain the black hole mass. Our stellar population modeling also reveals that the central, counter-rotating region of the nuclear cluster is dominated by $\sim$1~Gyr old populations.
description: 23 papes, 16 figures, 6 tables, Resubmitted after accounting for referee comments
Jet-cloud/star interaction as an interpretation of neutrino outburst from the blazar TXS 0506+056
Creators: name: Wang, Kai
name: Liu, Ruo-Yu
name: Li, Zhuo
name: Wang, Xiang-Yu
name: Dai, Zi-Gao
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A neutrino outburst between September 2014 and March 2015 was discovered from the blazar TXS 0506+056 by an investigation of $9.5$ years of IceCube data, while the blazar was in a quiescent state during the outburst with a gamma-ray flux only about one-fifth of the neutrino flux. In this work, we give a possible interpretation of the abnormal feature by proposing that the neutrino outburst originates from the interaction between a relativistic jet and a dense gas cloud formed via the tidally disrupted envelope of a red giant being blown apart by the impact of the jet. Gamma-ray photons and electron/positron pairs that are produced through the hadronuclear interactions correspondingly will induce electromagnetic cascades and then make the cloud ionized and thermalized. The EM radiation from jet-cloud/star interaction is mainly contributed by the relatively low-energy relativistic protons which propagate in the diffusion regime inside the cloud due to magnetic deflections, whereas the observed high-energy neutrinos ($\gtrsim 100\,\rm TeV$) are produced by the relatively high-energy protons which can keep beamed owing to the weak magnetic deflections, inducing a much higher flux of neutrinos than electromagnetic radiation. The observed low-energy electromagnetic radiations during the neutrino outburst period are almost as same as that in the quiescent state of the source, so it may mainly arise as same as the general quiescent state. As a result, due to the intrusion of a dense cloud, the neutrino outburst can be expected, and in the meantime, the accompanying electromagnetic radiations from hadronic processes will not cause any enhancement in the blazar's electromagnetic flux.
description: 15 pages, 3 figures; Accepted version
Study of the chemistry of dimethyl hydantoin (DMH) as a halogen stabiliser, and determination of DMH at low concentrations in environmental waters
Creators: name: Zhihong, Wu.
Publisher: name: Monash University
Year: 2022

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.
Molecular Gas Structures traced by $^{13}$CO Emission in the 18,190 $^{12}$CO Molecular Clouds from the MWISP Survey
Creators: name: Yuan, Lixia
name: Yang, Ji
name: Du, Fujun
name: Su, Yang
name: Liu, Xunchuan
name: Zhang, Shaobo
name: Sun, Yan
name: Zhou, Xin
name: Yan, Qing-Zeng
name: Ma, Yuehui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: After the morphological classification of the 18,190 $^{12}$CO molecular clouds, we further investigate the properties of their internal molecular gas structures traced by the $^{13}$CO($J=$ 1$-$0) line emissions. Using three different methods to extract the $^{13}$CO gas structures within each $^{12}$CO cloud, we find that $\sim$ 15$\%$ of $^{12}$CO clouds (2851) have $^{13}$CO gas structures and these $^{12}$CO clouds contribute about 93$\%$ of the total integrated flux of $^{12}$CO emission. In each of 2851 $^{12}$CO clouds with $^{13}$CO gas structures, the $^{13}$CO emission area generally does not exceed 70$\%$ of the $^{12}$CO emission area, and the $^{13}$CO integrated flux does not exceed 20$\%$ of the $^{12}$CO integrated flux. We reveal a strong correlation between the velocity-integrated intensities of $^{12}$CO lines and those of $^{13}$CO lines in both $^{12}$CO and $^{13}$CO emission regions. This indicates the H$_{2}$ column densities of molecular clouds are crucial for the $^{13}$CO lines emission. After linking the $^{13}$CO structure detection rates of the 18,190 $^{12}$CO molecular clouds to their morphologies, i.e. nonfilaments and filaments, we find that the $^{13}$CO gas structures are primarily detected in the $^{12}$CO clouds with filamentary morphologies. Moreover, these filaments tend to harbor more than one $^{13}$CO structure. That demonstrates filaments not only have larger spatial scales, but also have more molecular gas structures traced by $^{13}$CO lines, i.e. the local gas density enhancements. Our results favor the turbulent compression scenario for filament formation, in which dynamical compression of turbulent flows induces the local density enhancements. The nonfilaments tend to be in the low-pressure and quiescent turbulent environments of the diffuse interstellar medium.
description: 21 pages, 14 Figures; Appendix (17 pages, 19 Figures); Accepted for publication in the journal ApJS
A Mode-Sum Prescription for Vacuum Polarization in Odd Dimensions
Creators: name: Taylor, Peter
name: Breen, Cormac
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new mode-sum regularization prescription for computing the vacuum polarization of a scalar field in static spherically-symmetric black hole spacetimes in odd dimensions. This is the first general and systematic approach to regularized vacuum polarization in higher dimensions. Remarkably, the regularization parameters can be computed in closed form in arbitrary dimensions and for arbitrary metric function $f(r)$. In fact, we show that in spite of the increasing severity and number of the divergences to be regularized, the method presented is mostly agnostic to the number of dimensions. Finally, as an explicit example of our method, we show plots for vacuum polarization in the Schwarzschild-Tangherlini spacetime for odd $d=5,...,11$.
description: New references added. Minor edits
The influence of vocal tract resonances on the operation of reed wind instruments
Creators: name: Johnston, Robert B.
Publisher: name: Monash University
Year: 2022

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.
Close Major Merger Pairs at $z=0$: Bulge-to-Total Ratio and Star Formation Enhancement
Creators: name: He, Chuan
name: Xu, Cong Kevin
name: Domingue, Donovan
name: Cao, Chen
name: Huang, Jiasheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of the bulge-to-total ratio (B/T) of a Ks-band-selected sample of 88 close major-merger pairs of galaxies (H-KPAIR) based on 2-D decomposition of SDSS r-band images with \textsc{galfit}. We investigate the dependence of the interaction-induced specific star formation rate enhancement ($\rm sSFR_{enh}$) on the B/T ratio, and the effects of this dependence on the differences between star-forming galaxies (SFGs) in spiral+spiral (S+S) and spiral+elliptical (S+E) pairs. Of all 132 spiral galaxies in H-KPAIR, the 44 in S+E pairs show higher B/T than those in the 44 S+S pairs, with means of $\rm B/T = 0.35 \pm 0.05$ and $\rm B/T = 0.26 \pm 0.03$, respectively. There is a strong negative dependence of $\rm sSFR_{enh}$ on the B/T ratio and only paired SFGs with $\rm B/T<0.3$ show significant ($>5σ$) enhancement. Paired SFGs in S+S pairs show a similar trend, and many disky SFGs ($\rm B/T<0.1$) in S+S have strong sSFR enhancements ($\rm sSFR_{enh} > 0.7$~dex). For SFGs in S+E, the sSFR has no clear B/T dependence, nor any significant enhancement in any B/T bin. Disky SFGs in S+S show significant ($>4σ$) enhancement in the molecular gas content ($\rm M_{H_2}/M_{star}$), while SFGs in S+E have no such enhancement in any B/T bin. No significant enhancement on total gas content ($\rm M_{gas}/M_{star}$) is found in any B/T bin for paired galaxies. The star formation efficiency of either the total gas ($\rm SFE_{gas} = SFR/M_{gas}$) or the molecular gas ($\rm SFE_{H_2} = SFR/M_{H_2}$) does not depend on the B/T ratio. The only significant ($>4σ$) SFE enhancement found for paired SFGs is the $\rm SFE_{gas}$ for disky SFGs in S+S pairs.
description: Accepted for publication in ApJS, 18 pages, 13 figures, 1 table
An Enhanced Multi-Objective Biogeography-Based Optimization for Overlapping Community Detection in Social Networks with Node Attributes
Creators: name: Reihanian, Ali
name: Feizi-Derakhshi, Mohammad-Reza
name: Aghdasi, Hadi S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Social and Information Networks (cs.SI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Community detection is one of the most important and interesting issues in social network analysis. In recent years, simultaneous considering of nodes' attributes and topological structures of social networks in the process of community detection has attracted the attentions of many scholars, and this consideration has been recently used in some community detection methods to increase their efficiencies and to enhance their performances in finding meaningful and relevant communities. But the problem is that most of these methods tend to find non-overlapping communities, while many real-world networks include communities that often overlap to some extent. In order to solve this problem, an evolutionary algorithm called MOBBO-OCD, which is based on multi-objective biogeography-based optimization (BBO), is proposed in this paper to automatically find overlapping communities in a social network with node attributes with synchronously considering the density of connections and the similarity of nodes' attributes in the network. In MOBBO-OCD, an extended locus-based adjacency representation called OLAR is introduced to encode and decode overlapping communities. Based on OLAR, a rank-based migration operator along with a novel two-phase mutation strategy and a new double-point crossover are used in the evolution process of MOBBO-OCD to effectively lead the population into the evolution path. In order to assess the performance of MOBBO-OCD, a new metric called alpha_SAEM is proposed in this paper, which is able to evaluate the goodness of both overlapping and non-overlapping partitions with considering the two aspects of node attributes and linkage structure. Quantitative evaluations reveal that MOBBO-OCD achieves favorable results which are quite superior to the results of 15 relevant community detection algorithms in the literature.
description: 1. This paper has been published in the journal of "Information Sciences". 2. https://doi.org/10.1016/j.ins.2022.11.125
Staircase of crystal phases of hard-core bosons on the Kagome lattice
Creators: name: Huerga, Daniel
name: Capponi, Sylvain
name: Dukelsky, Jorge
name: Ortiz, Gerardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the quantum phase diagram of a system of hard-core bosons on the Kagome lattice with nearest-neighbor repulsive interactions, for arbitrary densities, by means of the hierarchical mean field theory and exact diagonalization techniques. This system is isomorphic to the spin S=1/2 XXZ model in presence of an external magnetic field, a paradigmatic example of frustrated quantum magnetism. In the non-frustrated regime, we find two crystal phases at densities 1/3 and 2/3 that melt into a superfluid phase when increasing the hopping amplitude, in semi-quantitative agreement with quantum Monte Carlo computations. In the frustrated regime and away from half-filling, we find a series of plateaux with densities commensurate with powers of 1/3. The broader density plateaux (at densities 1/3 and 2/3) are remnants of the classical degeneracy in the Ising limit. For densities near half-filling, this staircase of crystal phases melts into a superfluid, which displays finite chiral currents when computed with clusters having an odd number of sites. Both the staircase of crystal phases and the superfluid phase prevail in the non-interacting limit, suggesting that the lowest dispersionless single-particle band may be at the root of this phenomenon.
Digitalisation of Art Historical Lantern Slides
Creators: name: Blumenthal, Ulrike
Publisher: name: Zenodo
Year: 2023
Subjects: Digitalisation
Lantern Slides
Art History

description: In art history, using and accessing visual material is as important as having recourse to academic literature. The integration of reproductions in the form of photographic prints and slides into the discipline around 1900 shifted the methodological focus in research and teaching from source work to the image, leading to the creation of large collections of slides alongside library holdings of research literature. Whilst the advent of digital images led to the decline of analogue slide collections at universities, it consequently also renewed interest in these collections as historical objects with potential for new research contexts. Offering far-reaching insights into the histories of art, questions of canon(s) and collecting, as well as into the history of technology and photography, the digitisation of these slide collections presents an opportunity to preserve, access and use historic images in new ways. Although important slide collections around the world have been digitised, the scope, implementation and usability of these projects and their digitised objects are extremely varied. If art history wants to tap into these rich (re)sources, what is needed is not only consistent digitisation, indexing standards and controlled vocabularies, but also the integration into digital research environments and infrastructures. This poster presents the first steps and best practices for digitalising art historical lantern slides in order to make them available as research data. The poster is based on my master's thesis "Challenges and Opportunities of Digitalising University Slide Collections", submitted in June 2023 at the Institute of Library and Information Science, Humboldt-Universität zu Berlin. The study focused on the digitisation projects of the Slide Archive of Kunstgeschichtliches Seminar, Universität Hamburg (https://www.kulturwissenschaften.uni-hamburg.de/ks/einrichtungen/bildarchive/diaarchiv.html) and the Mediathek of the Humboldt-Universität zu Berlin (http://www.kunstgeschichte.hu-berlin.de/institut/mediathek).
Abundances of uranium and thorium elements in Earth estimated by geoneutrino spectroscopy
Creators: name: Abe, S.
name: Asami, S.
name: Eizuka, M.
name: Futagi, S.
name: Gando, A.
name: Gando, Y.
name: Gima, T.
name: Goto, A.
name: Hachiya, T.
name: Hata, K.
name: Hosokawa, K.
name: Ichimura, K.
name: Ieki, S.
name: Ikeda, H.
name: Inoue, K.
name: Ishidoshiro, K.
name: Kamei, Y.
name: Kawada, N.
name: Kishimoto, Y.
name: Koga, M.
name: Kurasawa, M.
name: Maemura, N.
name: Mitsui, T.
name: Miyake, H.
name: Nakahata, T.
name: Nakamura, K.
name: Nakamura, K.
name: Nakamura, R.
name: Ozaki, H.
name: Sakai, T.
name: Sambonsugi, H.
name: Shimizu, I.
name: Shirahata, Y.
name: Shirai, J.
name: Shiraishi, K.
name: Suzuki, A.
name: Suzuki, Y.
name: Takeuchi, A.
name: Tamae, K.
name: Watanabe, H.
name: Yoshida, Y.
name: Obara, S.
name: Ichikawa, A. K.
name: Yoshida, S.
name: Umehara, S.
name: Fushimi, K.
name: Kotera, K.
name: Urano, Y.
name: Berger, B. E.
name: Fujikawa, B. K.
name: Learned, J. G.
name: Maricic, J.
name: Axani, S. N.
name: Fu, Z.
name: Smolsky, J.
name: Winslow, L. A.
name: Efremenko, Y.
name: Karwowski, H. J.
name: Markoff, D. M.
name: Tornow, W.
name: Li, A.
name: Detwiler, J. A.
name: Enomoto, S.
name: Decowski, M. P.
name: Grant, C.
name: Song, H.
name: O'Donnell, T.
name: Dell'Oro, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The decay of the primordial isotopes $^{238}\mathrm{U}$, $^{235}\mathrm{U}$, $^{232}\mathrm{Th}$, and $^{40}\mathrm{K}$ have contributed to the terrestrial heat budget throughout the Earth's history. Hence the individual abundance of those isotopes are key parameters in reconstructing contemporary Earth model. The geoneutrinos produced by the radioactive decays of uranium and thorium have been observed with the Kamioka Liquid-Scintillator Antineutrino Detector (KamLAND). Those measurements have been improved with more than 18-year observation time, and improvements in detector background levels mainly by an 8-year almost rector-free period now permit spectroscopy with geoneutrinos. Our results yield the first constraint on both uranium and thorium heat contributions. Herein the KamLAND result is consistent with geochemical estimations based on elemental abundances of chondritic meteorites and mantle peridotites. The High-Q model is disfavored at 99.76% C.L. and a fully radiogenic model is excluded at 5.2$σ$ assuming a homogeneous heat producing element distribution in the mantle.
description: 13 pages, 2 figures, accepted for publication in Geophysical Research Letters on Aug 4th, 2022
Metric mean dimension and analog compression
Creators: name: Gutman, Yonatan
name: Śpiewak, Adam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 37A05, 37B10, 94A29

description: Wu and Verdú developed a theory of almost lossless analog compression, where one imposes various regularity conditions on the compressor and the decompressor with the input signal being modelled by a (typically infinite-entropy) stationary stochastic process. In this work we consider all stationary stochastic processes with trajectories in a prescribed set of (bi-)infinite sequences and find uniform lower and upper bounds for certain compression rates in terms of metric mean dimension and mean box dimension. An essential tool is the recent Lindenstrauss-Tsukamoto variational principle expressing metric mean dimension in terms of rate-distortion functions. We obtain also lower bounds on compression rates for a fixed stationary process in terms of the rate-distortion dimension rates and study several examples.
description: v3: Accepted for publication in IEEE Transactions on Information Theory. Additional examples were added. Material have been reorganized (with some parts removed). Minor mistakes were corrected
Health Literacy and Health Promoting Behaviors Among Adults at Risk for Diabetes in a Rural Setting
Creators: name: Ydirin, Christian Sandor Badana
Publisher: name: Zenodo
Year: 2020
Subjects: Diabetology
Public Health Research and Medicine

description: Due to the lack of baseline data assessing the health literacy and health behaviors of adults in a remotely located upland barangay, which employs vigorous statistical sampling, that could support the existing relationship between health literacy and health promoting behaviors among adults at risk for diabetes, this study came into fruition. This descriptive correlational research design study generally aimed to determine the existing correlation between the health literacy and health promoting behaviors of adults at high risk for diabetes. A total of 400 adults in Barangay Vizcaya, President Roxas, Capiz, aged 18-59 years old, were included in the final sample after they were were randomly selected utilizing a proportionate stratified sampling technique by age and sex. Data were collected through face-to-face
 interview using the Health Literacy and Health Promoting Behavior Questionnaires.
 Both adults at high and low risk for diabetes were found out to have limited health literacy and negative health promoting behaviors, with disease prevention and physical activity as having the worst health literacy and health behavior subscale scores, respectively. A statistically and practically significant difference exists between the health literacy of adults with high and low risk for diabetes, but no significant difference exists between their health promoting behaviors. Furthermore, there is a moderately positive correlation between the health literacy and health promoting behaviors of adults at high risk for diabetes. Thus, healthcare workers need to focus on increasing the health literacy of adults, especially those who are at high risk for diabetes, to facilitate development of health promoting behaviors. An all population-based inclusion should still be implemented when conducting health information campaigns, so as to reach the greater percentage of the adults who have
 lower levels of health literacy.
System equivalent flux density of Stokes I, Q, U, V of a polarimetric interferometer
Creators: name: Sutinjo, A. T.
name: Ung, D. C. X.
name: Sokolowski, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the system equivalent flux density (SEFD) expressions for all four Stokes parameters: I, Q, U, V. The expressions were derived based on our derivation of SEFD I (for Stokes I) and subsequent extensions of that work to phased array and multipole interferometers. The key to the derivation of the SEFD Q, U, V expressions is to recognize that the noisy estimates of Q, U, V can be written as the trace of a matrix product. This shows that the SEFD I is a special case, where the general case involves a diagonal or anti-diagonal 2x2 matrix interposed in the matrix multiplication. Following this step, the relation between the SEFD for I and Q, U, V becomes immediately evident. We present example calculations for a crossed dipole based on the formulas derived and the comparison between simulation and observation using the Murchison Widefield Array (MWA).
description: 6 pages, 4 figures. Accepted for publication in A&A on 25 May 2022
title: Characterisation and functional analysis of fission yeast tropomyosin mutants and development of quantum dot-antibody conjugates for cellular imaging
Creators: name: East, Daniel
Publisher: name: University of Kent
Year: 2023

description: Tropomyosin (Tm) is an evolutionarily conserved dimeric a-helical coiled coil protein, which interacts end-to-end to form polymers capable of associating with and stabilising actin-filaments and thereby regulate myosin function. The fission yeast, Schizosaccharomyces pombe, possesses a single Tm, Cdc8, an essential protein which can be acetylated on its amino terminus to increase its affinity for actin and enhance its ability to regulate myosin function. During this study extensive analyses on the physical properties of acetylated and unacetylated Cdc8 protein, together with a series of novel amino terminal Cdc8 mutants were undertaken in an attempt to explore the effects of amino terminal modification on the Cdc8 protein. In addition, a series of experiments were undertaken to develop fluorescent quantum dot (QD)-antibody (IgG) conjugates for visualising Cdc8 localisation in S. pombe cells. Modifications to the amino terminus altered the stability of the Cdc8 protein, its ability to form end-to-end interactions and its affinity for actin. Changes in actin affinity were reflected in the ability of the Cdc8 proteins to regulate myosin S1 ATPase activity. Despite changes to their biochemical properties, Cdc8 proteins expressed in a temperature sensitive S. pombe strain were capable of complementing function at the restrictive temperature. However, when expressed in a Naacetyltransferase deficient S. pombe strain, the mutant Cdc8 proteins were unable to rescue the growth defects associated with this strain. The QD-IgG conjugates produced during this study produced superior images when compared to organic fluorophores and were significantly more resistant to photobleaching. This work has provided insights into the importance of acetylation and the structure of the amino terminus for the function of fission yeast Tm and has highlighted the importance of reaction stoichiometry, the difficulties arising from non-specific binding and quenching of fluorescence intensity when coupling QDs to IgG complexes.
The surjectivity of the Borel mapping in the mixed setting for ultradifferentiable ramification spaces
Creators: name: Jiménez-Garrido, Javier
name: Sanz, Javier
name: Schindl, Gerhard
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 26E10, 30D60, 46A13, 46E10

description: We consider r-ramification ultradifferentiable classes, introduced by J. Schmets and M. Valdivia in order to study the surjectivity of the Borel map, and later on also exploited by the authors in the ultraholomorphic context. We characterize quasianalyticity in such classes, extend the results of Schmets and Valdivia about the image of the Borel map in a mixed ultradifferentiable setting, and obtain a version of the Whitney extension theorem in this framework.
description: 31 pages; this version has been accepted for publication in Monatsh. Math
Bouncing Dirac particles: compatibility between MIT boundary conditions and Thomas precession
Creators: name: Nicolaevici, Nistor
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the reflection of a Dirac plane wave on a perfectly reflecting plane described by chiral MIT boundary conditions and determine the rotation of the spin in the reflected component of the wave. We solve the analogous problem for a classical particle using the evolution of the spin defined by the Thomas precession and make a comparison with the quantum result. We find that the rotation axes of the spin in the two problems coincide only for a vanishing chiral angle, in which case the rotation angles coincide in the nonrelativistic limit, and also remain remarkably close in the relativistic regime. The result shows that in the nonrelativistic limit the interaction between the spin and a reflecting surface with nonchiral boundary conditions is completely contained in the Thomas precession effect, in conformity with the fact that these boundary conditions are equivalent to an infinite repulsive scalar potential outside the boundary. By contrast, in the ultrarelativistic limit the rotation angle in the quantum problem remains finite, while in the classical one the rotation angle diverges. We comment on the possible implications of this discrepancy on the validity of the Mathisson-Papapetrou-Dixon equations at large accelerations.
description: 29 pages, 6 figures; v2 a few references added
Almost analytic extensions of ultradifferentiable functions with applications to microlocal analysis
Creators: name: Fürdös, Stefan
name: Nenning, David Nicolas
name: Rainer, Armin
name: Schindl, Gerhard
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We review and extend the description of ultradifferentiable functions by their almost analytic extensions, i.e., extensions to the complex domain with specific vanishing rate of the $\bar \partial$-derivative near the real domain. We work in a general uniform framework which comprises the main classical ultradifferentiable classes but also allows to treat unions and intersections of such. The second part of the paper is devoted to applications in microlocal analysis. The ultradifferentiable wave front set is defined in this general setting and characterized in terms of almost analytic extensions and of the FBI transform. This allows to extend its definition to ultradifferentiable manifolds. We also discuss ultradifferentiable versions of the elliptic regularity theorem and obtain a general quasianalytic Holmgren uniqueness theorem.
description: 48 pages; minor changes, accepted for publication in Journal of Mathematical Analysis and Applications; some typos corrected
Optimal Searcher Distribution for Parallel Random Target Searches
Creators: name: Ro, Sunghan
name: Kim, Yong Woon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a problem of finding a target located in a finite $d$-dimensional domain, using $N$ independent random walkers, when partial information on the target location is given as a probability distribution. When $N$ is large, the first-passage time sensitively depends on the initial searcher distribution, which invokes the question of what is the optimal searcher distribution that minimizes the first-passage time. Here, we analytically derive the equation for the optimal distribution and explore its limiting expressions. If the target volume can be ignored, the optimal distribution is proportional to the target distribution to the power of one-third. If we consider a target of a finite volume and the probability of initial overlapping of searchers with the target cannot be ignored in the large $N$ limit, the optimal distribution has a weak dependence on the target distribution, given as a logarithm of the target distribution. Using Langevin dynamics simulations, we numerically demonstrate our predictions in one- and two-dimensions.
description: 7 pages, 3 figures
Barotropic modelling of low frequency variability in the Southern Hemisphere
Creators: name: Wells, Darren John.
Publisher: name: Monash University
Year: 2022

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.
Testing White Dwarf Age Estimates using Wide Double White Dwarf Binaries from Gaia EDR3
Creators: name: Heintz, Tyler M.
name: Hermes, J. J.
name: El-Badry, Kareem
name: Walsh, Charlie
name: van Saders, Jennifer L.
name: Fields, C. E.
name: Koester, Detlev
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: White dwarf (WD) stars evolve simply and predictably, making them reliable age indicators. However, self-consistent validation of the methods for determining WD total ages has yet to be widely performed. This work uses 1565 wide ( > 100 au) WD+WD binaries and 24 new triples containing at least two WDs to test the accuracy and validity of WD total age determinations. For these 1589 wide double-WD binaries and triples, we derive total ages of each WD using photometric data from all-sky surveys, in conjunction with Gaia parallaxes and current hydrogen-atmosphere WD models. Ignoring initial-to-final-mass relations and considering only WD cooling ages, we find that roughly 21-36% of the more massive WDs in a system have a shorter cooling age. Since more massive WDs should be born as more massive main-sequence stars, we attribute this unphysical disagreement as evidence of prior mergers or the presence of an unresolved companion, suggesting that roughly 21-36% of wide WD+WD binaries were once triples. Among the 423 wide WD+WD pairs that pass high-fidelity cuts, we find that 25% total age uncertainties are generally appropriate for WDs with masses > 0.63 Msun and temperatures < 12,000 K, and provide suggested inflation factors for age uncertainties for higher-mass WDs. Overall, WDs return reliable stellar ages, but we detail cases where total ages are least reliable, especially for WDs < 0.63 Msun.
description: 24 pages, 10 figures. Submitted to ApJ. Catalog available at https://sites.bu.edu/buwd/files/2022/05/Table_A1.csv
The electromagnetic and gravitational-wave radiations of X-ray transient CDF-S XT2
Creators: name: Lü, Hou-Jun
name: Yuan, Yong
name: Lan, Lin
name: Zhang, Bin-Bin
name: Zou, Jin-Hang
name: Liang, En-Wei
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Binary neutron star (NS) mergers may result in remnants of supra-massive or even stable NS, which have been supported indirectly by observed X-ray plateau of some gamma-ray bursts (GRBs) afterglow. Recently, Xue et al. (2019) discovered a X-ray transient CDF-S XT2 that is powered by a magnetar from merger of double NS via X-ray plateau and following stepper phase. However, the decay slope after the plateau emission is a little bit larger than the theoretical value of spin-down in electromagnetic (EM) dominated by losing its rotation energy. In this paper, we assume that the feature of X-ray emission is caused by a supra-massive magnetar central engine for surviving thousands of seconds to collapse black hole. Within this scenario, we present the comparisons of the X-ray plateau luminosity, break time, and the parameters of magnetar between CDF-S XT2 and other short GRBs with internal plateau samples. By adopting the collapse time to constrain the equation of state (EOS), we find that three EOSs (GM1, DD2, and DDME2) are consistent with the observational data. On the other hand, if the most released rotation energy of magnetar is dominated by GW radiation, we also constrain the upper limit of ellipticity of NS for given EOS, and it is range in $[0.32-1.3]\times 10^{-3}$. Its GW signal can not be detected by aLIGO or even for more sensitive Einstein Telescope in the future.
description: 13 pages, 5 figures,1 table. Accepted for publication by Research in Astronomy and Astrophysics
Gravitational properties of light - The emission of counter-propagating laser pulses from an atom
Creators: name: Rätzel, Dennis
name: Wilkens, Martin
name: Menzel, Ralf
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81V80, 78A40, 78A60, 83C25, 83C35, 83C50

description: The gravitational field of a laser pulse, although not detectable at the moment, comes with a peculiar feature which continues to attract attention; cause and effect propagate with the same speed, that of light. A particular result of this feature is that the gravitational field of an emitted laser pulse and the gravitational effect of the emitter's energy-momentum change are intimately entangled. In this article, a specific example of an emission process is considered - an atom, modeled as a point mass, emits two counter-propagating pulses. The corresponding curvature and the effect on massive and massless test particles is discussed. A comparison is made with the metric corresponding to a spherically symmetric massive object that isotropically emits radiation - the Vaidya metric.
description: 17 pages, 5 figures
Effect preeclampsia/Eclampsia on incidence rate of small for gestational age among pregnanat women in mekelle general Hospital and ayder comprehensive specialized hospital, Tigray, Northern Ethiopia.
Creators: name: Tekelaye, Embaba
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Background: In low and middle-income countries including Ethiopia, small for gestational age is a serious health problem, due to an increase in fetal and neonatal mortality and morbidity. In Ethiopia and particularly in Tigray there is a paucity of information on incidence rate and predictors of small for gestational age among pregnant women. Therefore the aim of this study is to determine the effect of preeclampsia on the incidence of small for gestational age among pregnant women in Mekelle General Hospital and Ayder Comprehensive Specialized Hospital, Tigray, Northern Ethiopia, 2019. Methods: A retrospective cohort study was employed to compare the small for gestational age between the exposed; preeclampsia (n=239) and non exposed; normotensive (n=476) women who were antenatal care follow-up in Mekelle General Hospital and Ayder Comprehensive Specialized Hospital from January 01, 2014 to March 31,2019. Systematic sampling was used to select the study participants. A pre-tested structured data abstraction checklist was used to extract data. Collected data were entered and cleaned using Epi Data version 3.1 and exported to STATA version 14 for analysis. The incidence rate was calculated dividing all small for gestational age cases in the cohort for the person-weeks of follow-up. The data analysis was performed by Cox proportional hazard model. Results: The incidence rate of small for gestational age was higher among preeclampsia than normotensive women (94.5 versus 24.9 per 1000 person weeks, Z=9.42, p<0.000001).The hazard of small for gestational age was four times higher in preeclampsia women than normotensive pregnant women, (AHR=3.92, 95% CI 2.55-6.01), history of low birth weight (AHR=0.41, 95%CI 0.17-0.94), poor gestational weight gain (AHR=1.89, 95% CI 1.15-3.1) were significant predictors. Conclusion and recommendation: There is a significant difference between preeclampsia and normotensive pregnant women in terms of the incidence rate of small for gestational age. Preeclampsia, a history of low birth weight and weight gain had significant predictors for small for gestational age. It is needed to strengthen the screening of preeclampsia for optimal fetal growth, and counseling on nutrients for adequate gestational weight gain. Further study will be also important to confirm the predictors at the community level.
YOLoC: DeploY Large-Scale Neural Network by ROM-based Computing-in-Memory using ResiduaL Branch on a Chip
Creators: name: Chen, Yiming
name: Yin, Guodong
name: Tan, Zhanhong
name: Lee, Mingyen
name: Yang, Zekun
name: Liu, Yongpan
name: Yang, Huazhong
name: Ma, Kaisheng
name: Li, Xueqing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Computing-in-memory (CiM) is a promising technique to achieve high energy efficiency in data-intensive matrix-vector multiplication (MVM) by relieving the memory bottleneck. Unfortunately, due to the limited SRAM capacity, existing SRAM-based CiM needs to reload the weights from DRAM in large-scale networks. This undesired fact weakens the energy efficiency significantly. This work, for the first time, proposes the concept, design, and optimization of computing-in-ROM to achieve much higher on-chip memory capacity, and thus less DRAM access and lower energy consumption. Furthermore, to support different computing scenarios with varying weights, a weight fine-tune technique, namely Residual Branch (ReBranch), is also proposed. ReBranch combines ROM-CiM and assisting SRAM-CiM to ahieve high versatility. YOLoC, a ReBranch-assisted ROM-CiM framework for object detection is presented and evaluated. With the same area in 28nm CMOS, YOLoC for several datasets has shown significant energy efficiency improvement by 14.8x for YOLO (Darknet-19) and 4.8x for ResNet-18, with <8% latency overhead and almost no mean average precision (mAP) loss (-0.5% ~ +0.2%), compared with the fully SRAM-based CiM.
description: 6 pages, 14 figures. to be published in DAC 2022