cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
General Design Bayesian Generalized Linear Mixed Models
Creators: name: Zhao, Y.
name: Staudenmayer, J.
name: Coull, B. A.
name: Wand, M. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Linear mixed models are able to handle an extraordinary range of complications in regression-type analyses. Their most common use is to account for within-subject correlation in longitudinal data analysis. They are also the standard vehicle for smoothing spatial count data. However, when treated in full generality, mixed models can also handle spline-type smoothing and closely approximate kriging. This allows for nonparametric regression models (e.g., additive models and varying coefficient models) to be handled within the mixed model framework. The key is to allow the random effects design matrix to have general structure; hence our label general design. For continuous response data, particularly when Gaussianity of the response is reasonably assumed, computation is now quite mature and supported by the R, SAS and S-PLUS packages. Such is not the case for binary and count responses, where generalized linear mixed models (GLMMs) are required, but are hindered by the presence of intractable multivariate integrals. Software known to us supports special cases of the GLMM (e.g., PROC NLMIXED in SAS or glmmML in R) or relies on the sometimes crude Laplace-type approximation of integrals (e.g., the SAS macro glimmix or glmmPQL in R). This paper describes the fitting of general design generalized linear mixed models. A Bayesian approach is taken and Markov chain Monte Carlo (MCMC) is used for estimation and inference. In this generalized setting, MCMC requires sampling from nonstandard distributions. In this article, we demonstrate that the MCMC package WinBUGS facilitates sound fitting of general design Bayesian generalized linear mixed models in practice.
description: Published at http://dx.doi.org/10.1214/088342306000000015 in the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Football tracking networks: Beyond event-based connectivity
Creators: name: Buldu, J. M.
name: Garrido, D.
name: Antequera, D. R.
name: Busquets, J.
name: Estrada, E.
name: Resta, R.
name: del Campo, R. Lopez
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose using Network Science as a complementary tool to analyze player and team behavior during a football match. Specifically, we introduce four kinds of networks based on different ways of interaction between players. Our approach's main novelty is to use tracking datasets to create football tracking networks, instead of constructing and analyzing the traditional networks based on events. In this way, we are able to capture player interactions that go beyond passes and introduce the concepts of (a) Ball Flow Networks, (b) Marking Networks, (c) Signed Proximity Networks and (d) Functional Coordination Networks. After defining the methodology for creating each kind of network, we show some examples using tracking datasets from four different matches of LaLiga Santander. Finally, we discuss some of the applications, limitations, and further improvements of football tracking networks.
description: 13 pages, 5 figures
Intermediate-term periodicities in soft X-ray flare index during solar cycles 21, 22 and 23
Creators: name: Joshi, Bhuwan
name: Joshi, Anita
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have analyzed the intermediate term periodicities in soft X-ray flare index ($FI_{SXR}$) during solar cycles 21, 22 and 23. Power spectral analysis of daily $FI_{SXR}$ reveals a significant period of 161 days in cycle 21 which is absent during cycle 22 and 23. We have found that in cycle 22 periodicities of 74 and 83 days are in operation. A 123 day periodicity has been found to be statistically significant during the part of the current solar cycle 23. The existence of these periodicities has been discussed in the light of earlier results.
description: 9 pages, Appeared in the Solar Physics
Directed polymer in a random medium of dimension 1+3 : multifractal properties at the localization/delocalization transition
Creators: name: Monthus, Cecile
name: Garel, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the model of the directed polymer in a random medium of dimension 1+3, and investigate its multifractal properties at the localization/delocalization transition. In close analogy with models of the quantum Anderson localization transition, where the multifractality of critical wavefunctions is well established, we analyse the statistics of the position weights $w_L(\vec r)$ of the end-point of the polymer of length $L$ via the moments $Y_q(L) = \sum_{\vec r} [w_L(\vec r)]^q$. We measure the generalized exponents $τ(q)$ and $\tilde τ(q)$ governing the decay of the typical values $Y^{typ}_q(L) = e^{\bar{\ln Y_q(L)}} \sim L^{- τ(q)} $ and disorder-averaged values $\bar{Y_q(L)} \sim L^{- \tilde τ(q)} $ respectively. To understand the difference between these exponents, $ τ(q) \neq \tilde τ(q)$ above some threshold $q>q_c \sim 2$, we compute the probability distributions of $y=Y_q(L)/Y^{typ}_q(L) $ over the samples : we find that these distributions becomes scale invariant with a power-law tail $1/y^{1+x_q}$. These results thus correspond to the Ever-Mirlin scenario [Phys. Rev. Lett. 84, 3690 (2000)] for the statistics of Inverse Participation Ratios at the Anderson localization transitions. Finally, the finite-size scaling analysis in the critical region yields the correlation length exponent $ν\sim 2$.
description: 10 pages, 15 figures
An IoT Framework for Heart Disease Prediction based on MDCNN Classifier
Creators: name: Khan, Mohammad Ayoub
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Nowadays, heart disease is the leading cause of death worldwide. Predicting heart disease is a complex task since it requires experience along with advanced knowledge. Internet of Things (IoT) technology has lately been adopted in healthcare systems to collect sensor values for heart disease diagnosis and prediction. Many researchers have focused on the diagnosis of heart disease, yet the accuracy of the diagnosis results is low. To address this issue, an IoT framework is proposed to evaluate heart disease more accurately using a Modified Deep Convolutional Neural Network (MDCNN). The smartwatch and heart monitor device that is attached to the patient monitors the blood pressure and electrocardiogram (ECG). The MDCNN is utilized for classifying the received sensor data into normal and abnormal. The performance of the system is analyzed by comparing the proposed MDCNN with existing deep learning neural networks and logistic regression. The results demonstrate that the proposed MDCNN based heart disease prediction system performs better than other methods. The proposed method shows that for the maximum number of records, the MDCNN achieves an accuracy of 98.2 which is better than existing classifiers.
description: AEHO; cuttlefish algorithm; MDCNN; IoT; Cleveland Dataset; Sensors; Wearable device; CAGR; Electrocardiogram; LSTM and CNN
Degeneracy and size consistency in electronic density functional theory
Creators: name: Gori-Giorgi, Paola
name: Savin, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The electronic structure calculations based upon energy density functionals are highly successful and widely used both in solid state physics and quantum chemistry. Moreover, the Hohenberg-Kohn theorems and the Kohn-Sham method provide them with a firm basis. However, several basic issues are not solved, and hamper the progress to achieve high accuracy. In this paper we focus on the conceptual problem of size consistency, basing our analysis on the non-intensive character of the (spin) electronic density in the presence of degeneracy. We also briefly discuss some of the issues concerning fractional electron numbers from the same point of view, analyzing the behavior of the exact functionals for the He and the Hooke's atom series when the number of electrons fluctuates between one and two.
description: submitted to Journal of Physics: Conference Series
Emission Properties of Periodic Fast Radio Bursts from the Motion of Magnetars: Testing Dynamical Models
Creators: name: Li, Dongzi
name: Zanazzi, J. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent observations of the periodic Fast Radio Burst source 180916.J0158+65 (FRB 180916) find small linear polarization position angle swings during and between bursts, with a burst activity window that becomes both narrower and earlier at higher frequencies. Although the observed chromatic activity window disfavors models of periodicity in FRB 180916 driven by the occultation of a neutron star by the optically-thick wind from a stellar companion, the connection to theories where periodicity arises from the motion of a bursting magnetar remains unclear. In this paper, we show how altitude-dependent radio emission from magnetar curvature radiation, with bursts emitted from regions which are asymmetric with respect to the magnetic dipole axis, can lead to burst activity windows and polarization consistent with the recent observations. In particular, the fact that bursts arrive systematically earlier at higher frequencies disfavors theories where the FRB periodicity arises from forced precession of a magnetar by a companion or fallback disk, but is consistent with theories where periodicity originates from a slowly-rotating or freely-precessing magnetar. Several observational tests are proposed to verify/differentiate between the remaining theories, and pin-down which theory explains the periodicity in FRB 180916.
description: 8 page, 5 figures
Undoing the Doubling of Disablement in the ELA Classrooms: A Critical Teacher Story for New Inclusive Habits
Creators: name: Bass, Christopher R
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: This dissertation explores the doubling of disablement in the English Language Arts (ELA) classroom. My use of the phrase doubling of disablement is a reference to DuBois’ concept of double consciousness. As an African American living in a segregated America, DuBois describes living as a black man with a “sense of always looking at one’s self through the eyes of others, of measuring one’s soul by the tape of a world that looks on in amused contempt and pity” (p. 7). This experience led DuBois to claim that “One ever feels his two-ness,—an American, a Negro; two souls, two thoughts, two unreconciled strivings” (p.7). I argue that too often the traditional ELA curriculum asks differently abled students to read about their abilities from an ableist perspective while also enduring institutionalized ableist expectations and measures. As a result, the ELA curriculum may continually uphold the bind of a “two-ness”-- a sensation or tension between the institutionalized ableist gaze and the lived experiences of each student. As a critically reflective active teacher, I story my attempt to rework the ELA classroom to incorporate new, more inclusive habits of pedagogy that loosen the double disablement. I align my use of habits with the Deweyian notion that habits are more than mere routine. Rather, habits are actions of deeply held, oftentimes unconscious, beliefs. All habits are formed “under the influence of the customs of a group” (Dewey, 1927). Therefore, reversing the doubling of disablement requires that English teachers critically examine the beliefs behind their habits. This project turns back towards Dewey’s notion of habits, and I incorporate the values of critical literacy and Disability Studies in Education to better identify new critical commitments as the root of new habits that enact inclusive pedagogy.
Comment on "Nonexistence of "Spin Transverse Force" for a Relativistic Electron" by Wlodek Zawadzki (cond-mat/0701387)
Creators: name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This is a reply to W. Zawadzki's paper (arXiv: cond-mat/0701378) on non-exietence of spin transverse force for a relativistic electron. The force was first proposed by the present author that the spin current will experience a transverse force in an electric field as a relativistic quantum mechanical effect, and in semiconductor with Rahsba spin-orbit coupling. Zawadzki's approach is based on an incorrect relation between the velocity and canonical momentum, and his conclusion is not true.
description: 2 pages
Comet C/2011 J2 (LINEAR): Photometry and Stellar transit
Creators: name: Ivanova, Oleksandr
name: Borysenko, Serhi
name: Zubko, Evgenij
name: Krišandová, Zuzana Seman
name: Svoreň, Ján
name: Baransky, Aleksandr
name: Gabdeev, Maksim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present results of two-year photometric monitoring of Comet C/2011 J2 (LINEAR) that spans the time period from February 2013 through December 2014, before and after perihelion passage. The observations were conducted with broadband R filter. Analysis of observations of Comet C/2011 J2 (LINEAR) allows estimating the nucleus radius as function of geometric albedo and phase-darkening coefficient. Furthermore, our observations showed split of the comet. Fragment (B) additional to the primary C/2011 J2 nucleus was unambiguously detected; relative velocity is estimated to be near 0.17 ''/day. We derive the Afrho parameter and estimate the dust production rate in Comet C/2011 J2 (LINEAR) over the entire run of observations. We found a noticeable increase in Afrho parameter between September 18, 2014 and November 5, 2014, epoch when the nucleus presumably got split. On September 28, 2014, we observed a transit of the 16-magnitude star (USNO-A2 1275-18299027) near nucleus of the Comet C/2011 J2 (LINEAR). We retrieve the optical depth of the coma 0.034. The filling factor f that corresponds to such optical depth is in good quantitative agreement with the value that can be derived from the Afrho parameter under reasonable assumption on geometric albedo of cometary dust.
description: 34 pages, 10 figures, 3 tables
Non static local string in higher dimensional gravity
Creators: name: Rahaman, F.
name: Bhui, B. C.
name: Kalam, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the space-time structure of local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin in an arbitrary number of space-time dimensions with a non-zero cosmological constant >. A set of solutions of full non-linear Einstein's equations for the interior region of such a string are presented.
description: 6 pages
Dynamical Masses and Stellar Evolutionary Model Predictions of M-Stars
Creators: name: Pegues, Jamila
name: Czekala, Ian
name: Andrews, Sean M.
name: Öberg, Karin I.
name: Herczeg, Gregory J.
name: Bergner, Jennifer B.
name: Cleeves, L. Ilsedore
name: Guzmán, Viviana V.
name: Huang, Jane
name: Long, Feng
name: Teague, Richard
name: Wilner, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this era of Gaia and ALMA, dynamical stellar mass measurements provide benchmarks that are independent of observations of stellar characteristics and their uncertainties. These benchmarks can then be used to validate and improve stellar evolutionary models, which can lead to both imprecise and inaccurate mass predictions for pre-main-sequence, low-mass stars. We present the dynamical stellar masses derived from disks around three M-stars (FP Tau, J0432+1827, and J1100-7619) using ALMA observations of $^{12}$CO (J=2--1) and $^{13}$CO (J=2--1) emission. These are the first dynamical stellar mass measurements for J0432+1827 and J1100-7619 and the most precise measurement for FP Tau. Fiducial stellar evolutionary model tracks, which do not include any treatment of magnetic activity, agree with the dynamical measurement of J0432+1827 but underpredict the mass by $\sim$60\% for FP Tau and $\sim$80\% for J1100-7619. Possible explanations for the underpredictions include inaccurate assumptions of stellar effective temperature, undetected binarity for J1100-7619, and that fiducial stellar evolutionary models are not complex enough to represent these stars. In the former case, the stellar effective temperatures would need to be increased by $\sim$40K to $\sim$340K to reconcile the fiducial model predictions with the dynamically-measured masses. In the latter case, we show that the dynamical masses can be reproduced using results from stellar evolutionary models with starspots, which incorporate fractional starspot coverage to represent the manifestation of magnetic activity. Folding in low-mass M-stars from the literature and assuming that the stellar effective temperatures are imprecise but accurate, we find tentative evidence of a relationship between fractional starspot coverage and observed effective temperature for these young, cool stars.
description: 37 pages (14 pages in the main document, 23 pages in the appendix), 35 figures, 5 tables. Accepted in ApJ (December 2020)
An assessment of the baseline variability in the level of DNA damage in women as measured by the single cell gel electrophoresis assay
Creators: name: Ell, Karalynn Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: It is thought that a correlation between levels of DNA damage expressed in an individual and the potential for the future development of cancer exists, and that biomonitoring for such damage could eventually be used to detect individuals at risk before the onset of disease. The purpose of studies such as that described in this thesis is to develop and refine methods of biomonitoring for genetic damage. The objective of this thesis was to assess the background levels of DNA damage in women using the Single Cell. Gel Electrophoresis (SCGE) assay and interpret the meaning of the observed variability with respect to future study design and the sample size necessary to ensure statistical significance. Thirteen female subjects were recruited from the Vancouver Hospital-UBC site and the Occupational Hygiene programme at the University of British Columbia. Each subject was to provide six blood samples over a period of ten weeks, at varying or irregular intervals. A total of 73 blood samples were obtained. Peripheral blood lymphocytes were isolated from the samples, embedded in agarose, lysed to release the nuclear contents, and exposed to an electric current in order to allow the DNA to migrate from the nucleus. This procedure, known as the SCGE or "Comet" assay, enables the detection of single strand breaks and alkali-labile sites in the cellular DNA, as smaller fragments created by breakage will travel farther from the nucleus of the cell than larger fragments or unbroken DNA. Both technical and biological variability were observed in the sample data. A calculation of the coefficient of variation for several groups of data provided a crude estimate of variation for this study. The components of overall or total variability could not be determined, but both the inter- and intra- individual variability appeared to exceed the replicate-to-replicate technical variability. The internal standard used in this study did not provide the information desired with respect to day-to-day variability. It was concluded that the observed variation within individual subjects in the study necessitates the use of a longitudinal or multiple-samples-over-time study design, rather than cross sectional. The sample size necessary for statistical significance in a cross-sectional study comparing two groups with an alpha of 0.05 and a power of 0.80 is approximately 70 individuals per group if the detection of an increase of fifteen percent in image length is desired, and approximately 20 individuals per group if an increase of thirty percent in image length is to be detected.
Elucidating the Interactions between Heparanase and Heparanase 2 During a Herpes Simplex 2 Infection
Creators: name: Hopkins, James J
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Herpes simplex virus 2 (HSV-2) can productively infect many different cell types of human and nonhuman origin. Nucleoside analogs such as acyclovir (ACV) are currently prescribed clinically to curb this infection. Here we demonstrate interconnected roles for host enzymes, heparanase (HPSE), heparanase 2 (HPSE 2) and cathepsin L (Cath L), in HSV-2 release and inhibition in cells. In vaginal epithelial cells, HSV-2 causes heparan sulfate shedding and upregulation in HPSE, HPSE 2 and, Cath L protein levels during the productive phase of infection. Furthermore, inhibition of HPSE dramatically reduces HSV-2 release from vaginal epithelial cells, while HPSE 2 inhibition also show markedly less infection. Overexpression of HPSE leads to an increase in viral progeny, interestingly overexpression of HPSE 2 leads to less virus production. This work proposes that the HPSE increase after infection is mediated by an increased NF-_B nuclear localization and a resultant activation of HPSE transcription. Together these mechanisms contribute to the removal of heparan sulfate from the cell surface and thus facilitate virus release from cells. For HPSE 2 it’s proposed that the increase after infection is a response to the clearing of HS that can lead to some inhibition of infection, though more work is needed on this. Finally, also studied was a small molecule inhibitor, BX795, as a new and alternative solution to reduce HSV burden in humans. This work reported evidence for strong antiviral efficacy of BX795 on HSV-2 infection in vaginal epithelial cells in vitro at 10 µM and in vivo at 50 µM. Additionally, through biochemical assays in vitro and histopathology in vivo, it was showed that the tolerability of BX795 in vaginal epithelial cells at concentrations as high as 80 µM. Finally, using a murine model of vaginal infection, it was shown that topical therapy using 50 µM BX795 is well tolerated and efficacious in controlling HSV-2 replication.
WORKSHOP: Hybrid de novo genome assembly
Creators: name: Hall, Grace
name: Morgan, Steven
name: Makunin, Igor
Publisher: name: Zenodo
Year: 2021
Subjects: subject: Galaxy Australia
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Analysis
subject: Workflows
subject: Genomics
subject: Genome assembly
subject: De novo assembly
subject: http://edamontology.org/topic_0091
subject: http://edamontology.org/operation_2945
subject: http://edamontology.org/topic_0769
subject: http://edamontology.org/topic_0622
subject: http://edamontology.org/operation_0525
subject: http://edamontology.org/operation_0524

description: This record includes training materials associated with the Australian BioCommons workshop ‘Hybrid de novo genome assembly’. This workshop took place on 7 October 2021. Workshop description It’s now easier than ever to assemble new reference genomes thanks to hybrid genome assembly approaches which enable research on organisms for which reference genomes were not previously available. These approaches combine the strengths of short (Illumina) and long (PacBio or Nanopore) read technologies, resulting in improved assembly quality. In this workshop we will learn how to create and assess genome assemblies from Illumina and Nanopore reads using data from a Bacillus Subtilis strain. We will demonstrate two hybrid-assembly methods using the tools Flye, Pilon, and Unicycler to perform assembly and subsequent error correction. You will learn how to visualise input read sets and the assemblies produced at each stage and assess the quality of the final assembly. All analyses will be performed using Galaxy Australia, an online platform for biological research that allows people to use computational data analysis tools and workflows without the need for programming experience. This workshop is presented by the Australian BioCommons and Melbourne Bioinformatics with the assistance of a network of facilitators from the national Bioinformatics Training Cooperative. Materials are shared under a Creative Commons Attribution 4.0 International agreement unless otherwise specified and were current at the time of the event. Files and materials included in this record: Event metadata (PDF): Information about the event including, description, event URL, learning objectives, prerequisites, technical requirements etc. Index of training materials (PDF): List and description of all materials associated with this event including the name, format, location and a brief description of each file. Schedule (PDF): A breakdown of the topics and timings for the workshop Materials shared elsewhere: This workshop follows the tutorial ‘Hybrid genome assembly - Nanopore and Illumina’ developed by Melbourne Bioinformatics.
 https://www.melbournebioinformatics.org.au/tutorials/tutorials/hybrid_assembly/nanopore_assembly/
Interaction of plane gravitational waves with a Fabry-Perot cavity in the local Lorentz frame
Creators: name: Tarabrin, Sergey P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the interaction of plane '+'-polarized gravitational waves with a Fabry-Perot cavity in the local Lorentz frame of the cavity input mirror outside of the range of long-wave approximation with the force of radiation pressure taken into account. The obtained detector response signal is represented as a sum of two parts: (i) the phase shift due to displacement of the movable mirror under the influence of gravitational wave and the force of light pressure, and (ii) the phase shift due to direct interaction of gravitational wave with light wave inside the cavity. We obtain formula for the movable mirror law of motion paying close attention to the phenomena of optical rigidity, radiative friction and direct coupling of gravitational wave to light wave. Some issues concerning the detection of high-frequency gravitational waves and the role of optical rigidity in it are discussed. We also examine in detail special cases of optical resonance and small detuning from it and compare our results with the known ones.
description: 17 pages, 9 figures; corrected references [7,8,34], added 2 new references (currently [35,36]), added comments on (i) relativistic corrections, (ii) detector angular pattern, (iii) quantized electromagnetic field, increased font in figures
Lyapunov Exponents for Unitary Anderson Models
Creators: name: Hamza, Eman
name: Stolz, Günter
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B44, 37H15

description: We study a unitary version of the one-dimensional Anderson model, given by a five diagonal deterministic unitary operator multiplicatively perturbed by a random phase matrix. We fully characterize positivity and vanishing of the Lyapunov exponent for this model throughout the spectrum and for arbitrary distributions of the random phases. This includes Bernoulli distributions, where in certain cases a finite number of critical spectral values, with vanishing Lyapunov exponent, exists. We establish similar results for a unitary version of the random dimer model.
description: 18 pages
Überschall-Passagierjets – Vergangenheit und Zukunft
Creators: name: Spaeth, Andreas
Publisher: name: Zenodo
Year: 2021
Subjects: Überschallflug
Flugzeug
Überschallknall
Boeing
Lockheed
Schwenkflügel
Tuplolew
Concorde
SST
NASA
Boom
Testflugzeug
XB-1
aerolectures2021
aerolectures

description: Überschall-Passagierflugzeuge strahlen bis heute eine schier magische Faszination aus. Technisch höchst anspruchsvoll, elitär und ästhetisch stellen sie die absolute Spitze der Luftfahrtentwicklung dar. Bisher gelang nur drei Nationen der Bau und Betrieb solcher Hochleistungsmaschinen: der ehemaligen Sowjetunion und Frankreich/Großbritannien. Neue Technologien versprechen nun die Wiedergeburt dieser faszinierenden Flugzeuge. Im Vortrag berichtet Andreas Spaeth über die Geschichte und Technik des Überschallfliegens. Er beschreibt eigene Erfahrungen aus seinen Flügen mit der Concorde und gibt einen Ausblick auf die Neuentwicklungen der Überschallflugzeuge. Der Vortrag wurde gehalten aus Anlass des neuen Buches von Andreas Spaeth, das Ende 2020 herausgegeben wurde. Der Vortrag zeigt Bilder aus dem Buch. Andreas Spaeth ist seit 20 Jahren als Luftfahrtjournalist in Deutschland und international tätig. Er ist vernetzt mit Fluggesellschaften, Flughäfen und Flugzeugherstellern sowie verwandten Organisationen. Er schreibt zu Themen der zivilen Passagierluftfahrt in deutschen, englischen und amerikanischen Medien.
description: Hamburg Aerospace Lecture Series --- Collection of Presentations --- http://www.AeroLectures.de --- © Andreas Spaeth
"Ears" formation in Supernova Remnants: Overhearing an interaction history with bipolar circumstellar structures
Creators: name: Chiotellis, A.
name: Boumis, P.
name: Spetsieri, Z. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A characteristic feature that is frequently met in nearby supernova remnants (SNRs) is the existence of two antisymmetric, local protrusions that are projected as two "ears" in the morphology of the nebula. In this work, we present a novel scenario for the "ear" formation process according to which the two lobes are formed through the interaction of the SNR with a bipolar circumstellar medium (CSM) that was surrounding the explosion center. We conduct two dimensional hydrodynamic simulations and we show that the SNR shock breakout from the bipolar CSM triggers the inflation of two opposite protrusions at the equator of the remnant that retain their size and shape for several hundreds up to a few thousand years of the SNR evolution. We run a set of models by varying the supernova (SN) and CSM properties and we demonstrate that the extracted results reveal a good agreement with the observables, regarding the "ears" sizes, lifespan, morphology and kinematics. We discuss the plausibility of our model in nature and we suggest that the most likely progenitors of the "ear-carrying" SNRs are the Luminous Blue Variables or the Red/Yellow Supergiants for the SNRs resulted by core collapse SN events and the symbiotic binaries or the planetary nebulae for the remnants formed by Type Ia SNe. Finally, we compare our model with other "ear" formation models of the literature and we show that there are distinctive differences among them, concerning the "ears" orientation and the phase in which the "ear" formation process occurs.
description: 13 pages, 8 Figures, Accepted for publication in MNRAS
Projectile motion of surface gravity water wave packets: An analogy to quantum mechanics
Creators: name: Rozenman, Georgi Gary
name: Zimmermann, Matthias
name: Efremov, Maxim A.
name: Schleich, Wolfgang P.
name: Case, William B.
name: Greenberger, Daniel M.
name: Shemer, Lev
name: Arie, Ady
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study phase contributions of wave functions that occur in the evolution of Gaussian surface gravity water wave packets with nonzero initial momenta propagating in the presence and absence of an effective external linear potential. Our approach takes advantage of the fact that in contrast to matter waves, water waves allow us to measure both their amplitudes and phases.
description: 6 pages, 1 table, 2 figures. Accepted to EPJ-ST, not published yet
Landau Problem in Noncommutative Quantum Mechanics
Creators: name: Dulat, Sayipjamal
name: Li, Kang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Landau problem in non-commutative quantum mechanics (NCQM) is studied. First by solving the Schr$\ddot{o}$dinger equations on noncommutative(NC) space we obtain the Landau energy levels and the energy correction that is caused by space-space noncommutativity. Then we discuss the noncommutative phase space case, namely, space-space and momentum-momentum non-commutative case, and we get the explicit expression of the Hamiltonian as well as the corresponding eigenfunctions and eigenvalues.
description: 8 pages
Identifying Grey-box Thermal Models with Bayesian Neural Networks
Creators: name: Hossain, Md Monir
name: Zhang, Tianyu
name: Ardakanian, Omid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Smart thermostats are one of the most prevalent home automation products. They learn occupant preferences and schedules, and utilize an accurate thermal model to reduce the energy use of heating and cooling equipment while maintaining the temperature for maximum comfort. Despite the importance of having an accurate thermal model for the operation of smart thermostats, fast and reliable identification of this model is still an open problem. In this paper, we explore various techniques for establishing a suitable thermal model using time series data generated by smart thermostats. We show that Bayesian neural networks can be used to estimate parameters of a grey-box thermal model if sufficient training data is available, and this model outperforms several black-box models in terms of the temperature prediction accuracy. Leveraging real data from 8,884 homes equipped with smart thermostats, we discuss how the prior knowledge about the model parameters can be utilized to quickly build an accurate thermal model for another home with similar floor area and age in the same climate zone. Moreover, we investigate how to adapt the model originally built for the same home in another season using a small amount of data collected in this season. Our results confirm that maintaining only a small number of pre-trained thermal models will suffice to quickly build accurate thermal models for many other homes, and that 1~day smart thermostat data could significantly improve the accuracy of transferred models in another season.
description: 10 pages
Kobayashi-Hitchin correspondence for tame harmonic bundles II
Creators: name: Mochizuki, Takuro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J60 53C07

description: Let $X$ be a smooth projective complex variety with an ample line bundle $L$, and let $D$ be a simple normal crossing divisor. We establish the Kobayashi-Hitchin correspondence between tame harmonic bundles on $X-D$ and $μ_L$-stable parabolic $λ$-flat bundles with trivial characteristic numbers on $(X,D)$. Especially, we obtain the quasiprojective version of the Corlette-Simpson correspondence between flat bundles and Higgs bundles.
description: Some arguments are simplified
Chemotype to Phenotype Studies of Bacterial-Fungal Interactions
Creators: name: Cleary, Jessica
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Bacteria and fungi frequently co-occur within complex multispecies microbiomes. While many microbiome studies have linked bacterial presence, and in some cases their metabolites, to health and disease states, fungi are often overlooked and understudied in these systems. Correlations between bacterial and fungal abundances based on metagenomics indicate that bacterial-fungal interactions are central to many microbiomes, and the mechanisms that drive these interactions impact microbiome formation and persistence. In most cases, microbial interactions involve excretion of and responses to secondary metabolites and studies that examine bacterial-fungal interactions often highlight the importance of these secondary metabolites. However, most of these studies are done on a case-by-case basis and are not necessarily translatable across different biological systems. With this dissertation I used a simplified model system for studying complex microbiomes and examine secondary metabolites that drive bacterial-fungal interactions within that model system. Various forms of mass spectrometry and analytical chemistry were employed to perform metabolomics experiments which were combined with genomic and transcriptomic information provided by our collaborators. This multi-omics approach provided a comprehensive overview of the bacterial-fungal interactions studied to shed light on the biological mechanisms that affect growth and stability within this model system. Patterns of conserved mechanisms that emerge may be translatable to higher order microbiomes.
Chemotype to Phenotype Studies of Bacterial-Fungal Interactions
Creators: name: Cleary, Jessica
Publisher: name: University of Illinois at Chicago
Year: 2020
Subjects: Uncategorized

description: Bacteria and fungi frequently co-occur within complex multispecies microbiomes. While many microbiome studies have linked bacterial presence, and in some cases their metabolites, to health and disease states, fungi are often overlooked and understudied in these systems. Correlations between bacterial and fungal abundances based on metagenomics indicate that bacterial-fungal interactions are central to many microbiomes, and the mechanisms that drive these interactions impact microbiome formation and persistence. In most cases, microbial interactions involve excretion of and responses to secondary metabolites and studies that examine bacterial-fungal interactions often highlight the importance of these secondary metabolites. However, most of these studies are done on a case-by-case basis and are not necessarily translatable across different biological systems. With this dissertation I used a simplified model system for studying complex microbiomes and examine secondary metabolites that drive bacterial-fungal interactions within that model system. Various forms of mass spectrometry and analytical chemistry were employed to perform metabolomics experiments which were combined with genomic and transcriptomic information provided by our collaborators. This multi-omics approach provided a comprehensive overview of the bacterial-fungal interactions studied to shed light on the biological mechanisms that affect growth and stability within this model system. Patterns of conserved mechanisms that emerge may be translatable to higher order microbiomes.
Postpartum Healthcare Use Between Two Deliveries and Severe Maternal Morbidity, Michigan, 2009-2015
Creators: name: Sappenfield, Olivia R
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Severe maternal morbidity (SMM) represents a group of life-threatening conditions of labor and delivery that have short and long-term implications. Current efforts focus on reducing SMM during acute events. Very little research has examined whether postpartum healthcare may complement current efforts. Postpartum healthcare, which includes attending a postpartum visit and receiving contraception, is important for addressing health needs, connecting individuals to needed specialty care and other preventive care such as a well-woman visit, and helping individuals achieve an optimal inter-pregnancy interval. However, there is a dearth of literature on whether postpartum healthcare use differs by SMM-status, whether postpartum healthcare use is associated with reduced risk of subsequent SMM, and whether history of SMM is associated with a change postpartum healthcare use across two deliveries. This study included Michigan residents with at least one, and a subset of individuals with at least two sequential, Medicaid-paid deliveries between October 1, 2009 and September 30, 2015. Data were from maternally linked birth records and Medicaid billing claims. SMM was identified from delivery claims using International Classification of Diseases, 9th Revision, Clinical Modification codes for 16 diagnoses and 5 procedures recommended by the Centers for Disease Control and Prevention. Postpartum healthcare included postpartum visit attendance with or without receipt of most or moderately effective contraception identified in billing claims. Postpartum visit attendance used the Healthcare Effectiveness Data and Information Set’s performance measure. In analysis, either multinomial or binary logistic regression was conducted to calculate predicted margins to generate either risk or rate ratios and 95% confidence intervals. Multivariable models were built using LASSO. Almost half of individuals with at least one Medicaid-paid delivery did not attend a postpartum visit, and postpartum healthcare use did not differ by SMM during delivery. About one-third of individuals with at least two sequential Medicaid-paid deliveries did not attend a postpartum visit after either delivery. Repeat SMM including transfusion was associated with a significantly higher probability of not attending a postpartum visit after either delivery. However, postpartum healthcare use, more specifically attending a postpartum visit and receiving contraception, was associated with a lower rate of subsequent SMM.
High Dimension Prediction
Creators: name: Nordgren, Rachel Katherine
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: Prediction methods may be high dimension in either outcome or covariate matrix. Here we examine shrinkage methods for multivariate prediction, multivariate calibration, and penalized regression for a single outcome with a large number of covariates--we motivate this section with microbiome data.
Indo-Canadian residential construction entrepreneurs in Vancouver : an examination of the interface between culture and economy
Creators: name: Walton-Roberts, Margaret
Publisher: name: University of British Columbia
Year: 2009

description: The prevalence of ethnically bounded economic enterprises and economies in western industrial nations has encouraged scholars and planners alike to examine the particular factors that encourage minorities and immigrants to enter self-employment. Typically the resulting claims fall into two camps: the first stresses the positive attributes, both economic and socio-cultural, that immigrants bring with them that facilitate and encourage self reliant forms of economic organization, while the second emphasizes negative structural influences that coerce immigrants and minorities into engaging with exploitative capitalist methods of organization. The debate becomes highly polarized due to these opposing interpretations, and other methods and levels of analysis, such as social construction theory and issues of racialization and discrimination, are neglected. In the case of Indo-Canadian construction related entrepreneurs, I attempt to overcome the dualistic tendencies of this debate by investigating the often subtle intersection of cultural and economic factors involved in minority enterprise through an ethnographic inquiry. This approach reveals how seemingly economic mechanisms such as; labour relations, client contact and contracting processes, are in fact culturally informed. My results suggests that co-ethnic labour, more so than co-ethnic clients, play an essential role in the operation of these enterprises, whether entrepreneurs are immigrants or native born. These connections are imbued with cultural as well as economic significance and exhibit the importance, and potential problems, of kin and co-ethnic support in economic organization. Whilst my results indicate processes of change are ongoing within immigrant/ethnic economic groupings, they also point to the resilience of ethnic connection through enterprise.
Factorizing Numbers with the Gauss Sum Technique: NMR Implementations
Creators: name: Mahesh, T. S.
name: Rajendran, Nageswaran
name: Peng, Xinhua
name: Suter, Dieter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Several physics-based algorithms for factorizing large number were recently published. A notable recent one by Schleich et al. uses Gauss sums for distinguishing between factors and non-factors. We demonstrate two NMR techniques that evaluate Gauss sums and thus implement their algorithm. The first one is based on differential excitation of a single spin magnetization by a cascade of RF pulses. The second method is based on spatial averaging and selective refocusing of magnetization for Gauss sums corresponding to factors. All factors of 16637 and 52882363 are successfully obtained.
description: 4 pages, 4 figures; Abstract and Conclusion are slightly modified. References added and formatted with Bibtex
Supergravity and the jet quenching parameter in the presence of R-charge densities
Creators: name: Avramis, Spyros D.
name: Sfetsos, Konstadinos
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following a recent proposal, we employ the AdS/CFT correspondence to compute the jet quenching parameter for N=4 Yang-Mills theory at nonzero R-charge densities. Using as dual supergravity backgrounds non-extremal rotating branes, we find that the presence of the R-charges generically enhances the jet quenching phenomenon. However, at fixed temperature, this enhancement might or might not be a monotonically increasing function of the R-charge density and depends on the number of independent angular momenta describing the solution. We perform our analysis for the canonical as well as for the grand canonical ensemble which give qualitatively similar results.
description: 18 pages, 2 figures; v3: clarifying comments added, references added, version to appear in JHEP