cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Signatures of elastoviscous buckling in the dilute rheology of stiff polymers
Creators: name: Chakrabarti, Brato
name: Liu, Yanan
name: Roure, Olivia du
name: Lindner, Anke
name: Saintillan, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: As a stiff polymer tumbles in shear flow, it experiences compressive viscous forces that can cause it to buckle and undergo a sequence of morphological transitions with increasing flow strength. We use numerical simulations to uncover the effects of these transitions on the steady shear rheology of a dilute suspension of stiff polymers. Our results agree with classic scalings for Brownian rods in relatively weak flows but depart from them above the buckling threshold. Signatures of elastoviscous buckling include enhanced shear thinning and an increase in the magnitude of normal stress differences. We discuss our findings in the light of past work on rigid Brownian rods and non-Brownian elastic fibers and highlight the subtle role of thermal fluctuations in triggering instabilities.
Experimental Investigation of Film Cooling in a Supersonic Environment
Creators: name: Collett, Matthew Dane
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Aerospace engineering
subject: Film Cooling
subject: NASA J-2X
subject: Schlieren
subject: Supersonic Flow

description: This thesis reports the results of an experimental investigation of film cooling in a supersonic environment using a modified version of an apparatus originally developed by Daanish Maqbool. A test matrix of conditions relevant to those found in the nozzle extension of the NASA J-2X rocket engine was used as the basis for the testing plan. A film heater was designed and constructed to enable operation at all points in the test matrix. Temperature-time histories from thermocouples embedded in the test section walls were used to compute the spatial evolution of the film cooling effectiveness at each test condition. The results were compared to numerical simulations by NASA's Loci-CHEM CFD tool. Standard speed (30 Hz) Schlieren videos of the film injection region were recorded and new machine vision-based techniques for automatically extracting flow information from Schlieren images were implemented.
Large Eddy Simulation of a Nonreacting Propane Jet
Creators: name: Briggs, Christopher Madden
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Engineering

description: Simulations of a turbulent momentum driven jet are carried out by Fire Dynamics Simulator (FDS). These simulations challenge the capabilities of FDS and identify strengths and weaknesses within its code; three bugs were discovered and new user controls were developed. Simulations show that mean and fluctuation vertical velocities and mean mixture fraction radial profiles at locations z/D=4, 15, and 30 are well-captured; however, mixture fraction fluctuations are over predicted at these elevations. Additionally mean vertical velocity predictions are artificially lower above the jet nozzle. These simulations are incorporated into the FDS validation suite.
Discussion paper. Conditional growth charts
Creators: name: Wei, Ying
name: He, Xuming
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62F35 (Primary) 62J20, 62P10 (Secondary)

description: Growth charts are often more informative when they are customized per subject, taking into account prior measurements and possibly other covariates of the subject. We study a global semiparametric quantile regression model that has the ability to estimate conditional quantiles without the usual distributional assumptions. The model can be estimated from longitudinal reference data with irregular measurement times and with some level of robustness against outliers, and it is also flexible for including covariate information. We propose a rank score test for large sample inference on covariates, and develop a new model assessment tool for longitudinal growth data. Our research indicates that the global model has the potential to be a very useful tool in conditional growth chart analysis.
description: This paper discussed in: [math/0702636], [math/0702640], [math/0702641], [math/0702642]. Rejoinder in [math.ST/0702643]. Published at http://dx.doi.org/10.1214/009053606000000623 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Radio emission and jets from Galactic microquasars
Creators: name: Gallo, Elena
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Thanks to aggressive campaigns of multi-wavelength observations of X-ray binaries in outbursts over the last decade or so, we have now reached a reasonable understanding of their radio phenomenology in response to changes in the global X-ray properties. Here I shall subjectively review the latest progresses made in assessing the interplay between inflow and outflow from an observational point of view, as well as point out a number of open issues that still need to be addressed both theoretically and observationally.
description: Invited Review at the VI Microquasar Workshop: Microquasars and beyond, Sept 18-22 2006, Como, Italy
Dynamic Force Measurement Capabilities for Hypersonic Wind Tunnel Testing
Creators: name: Collopy, Arianne Xaviera
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Aerospace engineering
subject: Force Balances
subject: Ground Testing
subject: Hypersonics

description: The object of this research is to characterize a new hybrid force measurement methodology using a piezoelectric balance in parallel with a conventional strain gauge balance, with the goal of enabling wide frequency range measurements for use in hypersonic ground test facilities. This technology, developed in collaboration with the Hypervelocity Wind Tunnel 9 at AEDC in White Oak, Maryland, is expected to provide accurate static and dynamic force and moment measurements on conventional test articles, providing simultaneous force, moment, heat transfer, and pressure measurements for maximal test productivity.

A finite element model of the model-balance-sting assembly was developed to perform static and transient simulations and thereby characterize the influence of design parameters such as model weight, stiffness, and placement of load cells. This thesis describes the work done with the computational model, paralleling ongoing laboratory work, which includes development of methodologies for static calibration and dynamic calibration using acceleration compensation.
Development of a Cyber Physical System for Fire Safety
Creators: name: Wills, Rosalie Faith
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Engineering
subject: BIM
subject: Cyber Physical
subject: Engineering
subject: Fire Safety

description: In this study a cyber physical system (a system of collaborating computational elements that monitor and control physical entities) test bed was developed to demonstrate the viability of real-time decision support for smart firefighting and to provide validation data for continued cyber physical system (CPS) development. This CPS utilizes current technologies in the modern built environment and emerging virtualization tools.  The smart networked fire test bed consisted of a multi-story instrumented building, a variety of fire and non-fire networked sensors, and a computational framework anchored by a Building Information Modeling (BIM) representation of the building. Well-controlled full-scale fire experiments were conducted (physical domain) and represented in the three-dimensional BIM (computational domain) allowing for visualization of critical static and dynamic building and fire information needed to support firefighter decisions. The CPS test bed produced remarkable evidence about the opportunities for fire safety created by the communication between sensors, BIM, and fire.
Fractional Laplacian Spectral Approach to Turbulence in a Dusty Plasma Monolayer
Creators: name: Kostadinova, Evdokiya G
name: Banka, Rahul
name: Padgett, Joshua L
name: Liaw, Constanze D
name: Matthews, Lorin S
name: Hyde, Truell W
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This work presents an analytical investigation of anomalous diffusion and turbulence in a dusty plasma monolayer, where energy transport across scales leads to the spontaneous formation of spatially disordered patterns. Many-body simulations of 10,000-particle dusty plasma monolayers are used to demonstrate how the global dynamics depend on the statistical properties of the dust assembly for realistic laboratory conditions. We find that disorder due to variations in the dust size distribution and charge-driven nonlocal interactions resulting in anomalous dust diffusion are key factors for the onset of instabilities. The resulting dynamics exhibit features of inertial turbulence over slightly more than half a decade of scales proportional or smaller than the Debye shielding length. These processes are examined analytically using a recently developed Fractional Laplacian Spectral (FLS) technique, which identifies the active energy channels as a function of scale, disorder concentration, and features of the nonlocal interactions. The predictions from the theoretical (spectral) analysis demonstrate agreement with the results from the many-body (kinetic) simulations, thus providing a powerful tool for the study of active turbulence.
description: 34 pages, 10 figures
Associations between Urinary Phthalates and Metabolic Syndrome in NHANES 2005-2010
Creators: name: Haque, Mefruz Salwa
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Epidemiology
subject: Environmental health
subject: epidemiology
subject: metabolic syndrome
subject: metabolites
subject: NHANES
subject: phthalates

description: Phthalates, commonly used to make plastics more durable, are a group of endocrine disrupting chemicals (EDC), with potential for adverse metabolic consequences.  Associations between exposure to 13 phthalate metabolites and the prevalence of metabolic syndrome (MetS) were examined among 5,409 U.S adults ≥ 18 years of age, who participated in the National Health and Nutrition Examination Survey from 2005-2010. MetS was assessed using clinical and questionnaire data.  Odds Ratio (OR) and 95% Confidence Intervals (CI) adjusting for age, creatinine and key confounders, were estimated with multivariable logistic regression. Positive associations were observed between individual phthalate metabolites and MetS: (MCOP OR=1.31, 95% CI=1.40, 1.64, p-trend
CMD-2 and SND results on the rho, omega and phi
Creators: name: Achasov, M. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The review of experimental results of the light vector mesons parameters studies with CMD-2 and SND detectors at VEPP-2M e+e- collider in the energy region 360 < sqrt{s} < 1380 MeV is given.
description: Talk given at Int. Workshop e+e- Collisions from phi to psi, February 27 - March2, 2006, Novosibirsk, Russia
Dense for the Price of Sparse: Improved Performance of Sparsely Initialized Networks via a Subspace Offset
Creators: name: Price, Ilan
name: Tanner, Jared
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: That neural networks may be pruned to high sparsities and retain high accuracy is well established. Recent research efforts focus on pruning immediately after initialization so as to allow the computational savings afforded by sparsity to extend to the training process. In this work, we introduce a new `DCT plus Sparse' layer architecture, which maintains information propagation and trainability even with as little as 0.01% trainable kernel parameters remaining. We show that standard training of networks built with these layers, and pruned at initialization, achieves state-of-the-art accuracy for extreme sparsities on a variety of benchmark network architectures and datasets. Moreover, these results are achieved using only simple heuristics to determine the locations of the trainable parameters in the network, and thus without having to initially store or compute with the full, unpruned network, as is required by competing prune-at-initialization algorithms. Switching from standard sparse layers to DCT plus Sparse layers does not increase the storage footprint of a network and incurs only a small additional computational overhead.
description: 18 pages, 15 figures
Rotation of Trajectories of Lipschitz Vector Fields
Creators: name: Comte, Georges
name: Yomdin, Yosef
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We prove that in finite time a trajectory of a Lipschitz vector field in $\hbox{\bbbb R}^{\hbox{\tmm n}}$ can not have infinite rotation around a given point. This result extends to the mutual rotation of two trajectories of a field in $\hbox{\bbbb R}^{\hbox{\tmm 3}}$: this rotation is bounded from above on any finite time interval. The bounds we give are only in terms of the Lipschitz constant of the field and the length of the time interval.
Changes of variables in modulation and Wiener amalgam spaces
Creators: name: Ruzhansky, Michael
name: Sugimoto, Mitsuru
name: Toft, Joachim
name: Tomita, Naohito
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S30, 47G30, 42B05

description: In this paper various properties of global and local changes of variables as well as properties of canonical transforms are investigated on modulation and Wiener amalgam spaces. We establish several relations among localisations of modulation and Wiener amalgam spaces and, as a consequence, we obtain several versions of local and global Beurling-Helson type theorems. We also establish a number of positive results such as local boundedness of canonical transforms on modulation spaces, properties of homogeneous changes of variables, and local continuity of Fourier integral operators on Fourier Lebesgue spaces. Finally, counterparts of these results are discussed for spaces on the torus as well as for weighted spaces.
description: 25 pages
Fokker-Planck and Chapman-Kolmogorov equations for Ito processes with finite memory
Creators: name: McCauley, Joseph L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The usual derivation of the Fokker-Planck partial differential eqn. assumes the Chapman-Kolmogorov equation for a Markov process. Starting instead with an Ito stochastic differential equation we argue that finitely many states of memory are allowed in Kolmogorov's two pdes, K1 (the backward time pde) and K2 (the Fokker-Planck pde), and show that a Chapman-Kolmogorov eqn. follows as well. We adapt Friedman's derivation to emphasize that finite memory is not excluded. We then give an example of a Gaussian transition density with 1 state memory satisfying both K1, K2, and the Chapman-Kolmogorov eqns. We begin the paper by explaining the meaning of backward diffusion, and end by using our interpretation to produce a new, short proof that the Green function for the Black-Scholes pde describes a Martingale in the risk neutral discounted stock price.
Ο πνευματικός βίος και το φιλανθρωπικό έργο της αγίας Ελισάβετ Φεόντοροβνα από το 1905 έως το 1918
Creators: name: Κυνηγού – Γιεβτουσένκο, Ελισάβετ
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αγία Ελισάβετ Φεόντοροβνα
Ρομάνοφ
Ρωσική Ορθόδοξη Εκκλησία
Saint Elisabeth Feodorovna
Romanov
Russian Orthodox Church

description: Η παρούσα μεταπτυχιακή εργασία αποτελεί μία προσπάθεια γνωριμίας των αναγνωστών με μία σύγχρονη αγία της ρωσικής ορθόδοξης Εκκλησίας, την αγία νέα οσιομάρτυρα Ελισάβετ Φεόντοροβνα, Μεγάλη Δούκισσα της Ρωσίας. Κεντρικός σκοπός της εργασίας είναι μέσα από τη παρουσίαση της φιλανθρωπικής δραστηριότητας και πνευματικής πορείας της Μεγάλης Δούκισσας Ελισάβετ να φωτιστεί ακόμη περισσότερο η αγία προσωπικότητά της. Εστιάζοντας κατά κύριο λόγο σε μία συγκεκριμένη περίοδο της ζωής της αγίας και συγκεκριμένα στα δεκατρία τελευταία χρόνια της ζωής της από το 1905 έως το 1918 που αποτελεί μία περίοδο βαθιάς εσωτερικής αναζήτησης, ριζικών αλλαγών, πνευματικής ωρίμανσης, έντονης φιλανθρωπικής δραστηριότητας, στο πλαίσιο της Μονής του Ελέους Μάρθας και Μαρίας, η έρευνά μας δύναται να εμπλουτίσει το υπάρχον ελληνικό βιβλιογραφικό υλικό. Επιπλέον η εργασία εισάγει έναν αναλυτικό χάρτη των έργων αγάπης και προσφοράς της. Τέλος, η έρευνα απευθύνεται τόσο σε φοιτητές όσο και σε απλούς αναγνώστες που ενδιαφέρονται να εμβαθύνουν στη σύγχρονη ρωσική ορθόδοξη ιστορία.
description: The present thesis is an attempt to familiarize readers with the life and work of a contemporary saint of the Russian Orthodox Church, the holy new martyr Grand Duchess of Russia, Elisabeth Feodorovna. The main aim is to shed light on her holy personality by examining closely her charitable activities and her spiritual way of life. By concentrating specifically on the last thirteen years of her life, from 1905 until 1918, a period of profound soul-searching, radical changes, spiritual growth and intense philanthropy within the Martha and Mary Convent of Mercy, the research adds to the already existing Greek literature and furthermore introduces a detailed map of her benevolence. Finally, this research is addressed both to students and readers who are interested in delving into the contemporary Russian Orthodox history.
Unmet Need for Nutrition-Related Services in Recently Hospital-Discharged Older Adults
Creators: name: Vaudin, Anna Margaret
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Nutrition
subject: Aging
subject: Assessment
subject: Community Services
subject: Older Adults
subject: Screening
subject: Transitional Care
subject: Unmet Need

description: Older adults returning home from the hospital may have disabilities that prevent them from obtaining or preparing adequate nutritious food.  Additionally, they may have difficulty identifying their need for or accessing services that could provide support.  We aimed to identify the level of unmet need for services that may affect nutritional health in community-dwelling older adults.  We also compared the prevalence of perceived need for services with objectively assessed need.  We explored the need for home health care, transportation, mental health, oral health, vision, grocery delivery, and physical therapy services in 566 community-dwelling, recently hospital-discharged older adults.  Almost half (45.6%) of the sample reported unmet need for at least one service.  For each service, there was discrepancy between perceived need and assessed need.  By improving the screening of hospital-discharged older adults' needs for nutrition-related services, the healthcare community can improve targeting of services to those with the most nutritional risk.
Integer sequences and matrices over finite fields
Creators: name: Morrison, Kent E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 05A15, 15A33; Secondary 05A10, 05A30, 11B65, 11B73

description: In this expository article we collect the integer sequences that count several different types of matrices over finite fields and provide references to the Online Encyclopedia of Integer Sequences (OEIS). Section 1 contains the sequences, their generating functions, and examples. Section 2 contains the proofs of the formulas for the coefficients and the generating functions of those sequences if the proofs are not easily available in the literature. The cycle index for matrices is an essential ingredient in most of the derivations.
description: 27 pages
Derivative relationships between volume and surface area of compact regions in R^d
Creators: name: Marichal, Jean-Luc
name: Dorff, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 51M25, 52A38 (Primary) 26A24, 52B60 (Secondary)

description: We explore the idea that the derivative of the volume, V, of a region in R^d with respect to r equals its surface area, A, where r = d V/A. We show that the families of regions for which this formula for r is valid, which we call homogeneous families, include all the families of similar regions. We determine equivalent conditions for a family to be homogeneous, provide examples of homogeneous families made up of non-similar regions, and offer a geometric interpretation of r in a few cases.
description: 15 pages
Search for R-parity violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using $\sqrt{s} = 13$ TeV proton-proton collision data
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for R-parity violating supersymmetry in final states characterised by high jet multiplicity, at least one isolated light lepton and either zero or at least three $b$-tagged jets is presented. The search uses 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV proton-proton collision data collected by the ATLAS experiment during Run 2 of the Large Hadron Collider. The results are interpreted in the context of R-parity-violating supersymmetry models that feature gluino production, top-squark production, or electroweakino production. The dominant sources of background are estimated using a data-driven model, based on observables at medium jet multiplicity, to predict the $b$-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. Machine learning techniques are used to reach sensitivity to electroweakino production, extending the data-driven background estimation to the shape of the machine learning discriminant. No significant excess over the Standard Model expectation is observed and exclusion limits at the 95% confidence-level are extracted, reaching as high as 2.4 TeV in gluino mass, 1.35 TeV in top-squark mass, and 320 (365) GeV in higgsino (wino) mass.
description: 56 pages in total, author list starts on page 40, 10 figures, 7 tables, submitted to EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2019-04
Development of a Quadcopter Test Environment and Research Platform
Creators: name: De Prins, Christian
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Electrical engineering
subject: control
subject: flight
subject: motion-capture
subject: quadcopter
subject: system

description: This thesis first uses a model-based systems engineering approach to model, design, and implement a quadcopter test environment and research platform (TERP). TERP provides quadcopter state information, using a motion capture system, which can be used with custom feedback strategies to enable controlled flight.

Next, it makes use of control theory to develop two controllers for quadcopter flight trajectory tracking: one based on linear quadratic regulation (LQR) and one based on model reference adaption. Simulations of both controllers are done in MATLAB using Simulink and seek to demonstrate the improved performance of the adaptive controller over the LQR controller in flight trajectory tracking with payload uncertainties. Flight tests with the LQR controller are then done to validate the TERP System.
CINECA webinar: FAIR software tools
Creators: name: Martinez-Ortiz, Carlos
Publisher: name: Zenodo
Year: 2021
Subjects: research software
FAIR software

description: In this talk, I discussed the importance of the FAIR principles for the software tools we use to process data. Ranging from small analysis scripts to full fledged data processing pipelines, software needs to be FAIR to enable other researchers to reproduce our own experiments and reuse our software. However software and data are fundamentally different – software is executable in nature and may have intricate dependencies. FAIR principles apply differently to software than they do to data and we must be aware of these differences. Existing initiatives such as the RDA FAIR for Research Software (FAIR4RS) working group (https://www.rd-alliance.org/groups/fair-4-research-software-fair4rs-wg) and http://fair-software.eu/ are already focused on addressing these differences and raising awareness of the importance of FAIR for software.
A growth model for water distribution networks with loops
Creators: name: Sugishita, Kashin
name: Abdel-Mottaleb, Noha
name: Zhang, Qiong
name: Masuda, Naoki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Water distribution networks (WDNs) expand their service areas over time. These growth dynamics are poorly understood. One facet of WDNs is that they have loops in general, and closing loops may be a functionally important process for enhancing their robustness and efficiency. We propose a growth model for WDNs that generates networks with loops and is applicable to networks with multiple water sources. We apply the proposed model to four empirical WDNs to show that it produces networks whose structure is similar to that of the empirical WDNs. The comparison between the empirical and modelled WDNs suggests that the empirical WDNs may realize a reasonable balance between cost, efficiency and robustness in terms of the network structure. We also study the design of pipe diameters based on a biological positive feedback mechanism. Specifically, we apply a model inspired by Physarum polycephalum to find moderate positive correlations between the empirical and modelled pipe diameters. The difference between the empirical and modelled pipe diameters suggests that we may be able to improve the performance of WDNs by following organizing principles of biological flow networks.
description: 21 pages, 7 figures, 1 table
title: Εισαγωγικό άρθρο με θέμα την ανοικοδόμηση στη Συρία - Παλμύρα
title: Introductory article on 'reconstruction in Syria - Palmyra'
Creators: name: Aldabet Hosam
Publisher: name: Technical University of Crete
Year: 2021

description: Μια σύντομη παρουσίαση πάνω στο θέμα της ανοικοδόμησης στη Συρία και συγκεκριμένα στη Παλμύρα. Στόχος της είναι να ανασυνθέσει με τρόπο απλό και κατανοητό την ομαλή πορεία στο θέμα αυτό. Η ερευνητική μέθοδος της εργασίας βασίζεται στην ανάλυση τριών βασικών ενοτήτων: 'ο τόπος, ο χρόνος και ο τρόπος’.
Alterations in human skeletal muscle proteins in amyotrophic lateral sclerosis
Creators: name: DeRusso, Alicia Lauren
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Cellular biology
subject: ALS
subject: amyotrophic lateral sclerosis
subject: ER stress
subject: protein alterations
subject: proteins
subject: skeletal muscle

description: Amyotrophic lateral sclerosis (ALS) is the most common fatal neurodegenerative disease, resulting in loss of voluntary muscle control, atrophy, paralysis, and eventually death.  Although the pathophysiology of ALS is not completely understood, recent research in Dr. Chin's lab has identified alterations in skeletal muscle proteins in ALS mice.  The purpose of this study was to investigate alterations in proteins involved in calcium handling (SERCA1 and SERCA2), endoplasmic reticulum (ER) stress (Grp78/BiP, PDI, and CHOP) and protein synthesis (Akt) in human ALS skeletal muscle.  The ER chaperone protein Grp78/BiP and Akt, a protein involved in protein synthesis, were higher in ALS compared to CON.  The calcium pump SERCA1 was lower in diaphragm compared to quadriceps muscles of ALS cases.  These data highlight alterations in skeletal muscle proteins not only between ALS and CON, but also between different muscles in ALS, which are helpful for informing future research study designs.
IMPACT OF TRANSIT ORIENTED DEVELOPMENT ON MODE CHOICE WITH CONSIDERATION FOR SELF SELECTION AND MULTIMODAL ACCESSIBILITY
Creators: name: Baghaei, Babak
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Civil engineering
subject: FOS: Civil engineering
subject: Transportation planning
subject: Multimodal Accessibility
subject: Self Selection
subject: Transit Oriented Development

description: The U.S Department of Transportation allocated $10 million in 2013 to provide funding to advance planning efforts that support Transit Oriented Development (TOD) associated with new fixed guideway and core capacity improvement projects. Transit Oriented Development (TOD) is generally considered to be a type of pedestrian-friendly community development around the major transit station that promotes transit ridership, increases non-motorized travel and encourages local economic development. This thesis is an effort to analyze the effect of TOD on travel mode choice in both Washington, DC, and Baltimore metropolitan areas using the MWCOG 2007 household travel survey. A relatively new method in the transportation field called "Propensity Score Matching" was used to address the self-selection, and statistical models were developed to evaluate the impact of TOD on mode choice. The results indicated that after controlling for self-selection, TOD has a significant impact on boosting transit ridership and increasing active mode of travel.
Minimal warm inflation with complete medium response
Creators: name: Laine, M.
name: Procacci, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: If a homogeneous field evolves within a medium, with the latter gradually picking up a temperature, then the friction felt by the field depends on how its evolution rate compares with medium time scales. We suggest a framework which permits to incorporate the contributions from all medium time scales. As an example, we illustrate how warm axion inflation can be described by inputting the retarded pseudoscalar correlator of a thermal Yang-Mills plasma. Adopting a semi-realistic model for the latter, and starting the evolution at almost vanishing temperature, we show how the system heats up and then enters the "weak" or "strong" regime of warm inflation. Previous approximate treatments are scrutinized.
description: 16 pages. v2: clarifications added
Exploring Broadband GRB Behavior During gamma-ray Emission
Creators: name: Yost, S. A.
name: Swan, H. F.
name: Rykoff, E. S.
name: Aharonian, F.
name: Akerlof, C. W.
name: Alday, A.
name: Ashley, M. C. B.
name: Barthelmy, S.
name: Burrows, D.
name: Depoy, D. L.
name: Dufour, R. J.
name: Eastman, J. D.
name: Forgey, R. D.
name: Gehrels, N.
name: Göğüş, E.
name: Güver, T.
name: Halpern, J. P.
name: Hardin, L. C.
name: Horns, D.
name: Kızıloǧlu, U.
name: Krimm, H. A.
name: Lepine, S.
name: Liang, E. P.
name: Marshall, J. L.
name: McKay, T. A.
name: Mineo, T.
name: Mirabal, N.
name: Özel, M.
name: Phillips, A.
name: Prieto, J. L.
name: Quimby, R. M.
name: Romano, P.
name: Rowell, G.
name: Rujopakarn, W.
name: Schaefer, B. E.
name: Silverman, J. M.
name: Siverd, R.
name: Skinner, M.
name: Smith, D. A.
name: Smith, I. A.
name: Tonnesen, S.
name: Troja, E.
name: Vestrand, W. T.
name: Wheeler, J. C.
name: Wren, J.
name: Yuan, F.
name: Zhang, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The robotic ROTSE-III telescope network detected prompt optical emission contemporaneous with the gamma-ray emission of Swift events GRB051109A and GRB051111. Both datasets have continuous coverage at high signal-to-noise levels from the prompt phase onwards, thus the early observations are readily compared to the Swift XRT and BAT high energy detections. In both cases, the optical afterglow is established, declining steadily during the prompt emission. For GRB051111, there is evidence of an excess optical component during the prompt emission. The component is consistent with the flux spectrally extrapolated from the gamma-rays, using the gamma-ray spectral index. A compilation of spectral information from previous prompt detections shows that such a component is unusual. The existence of two prompt optical components - one connected to the high-energy emission, the other to separate afterglow flux, as indicated in GRB051111 - is not compatible with a simple ``external-external'' shock model for the GRB and its afterglow.
description: ApJ accepted. 32 pages (in preprint form), 5 tables, 5 figures
New data structure for univariate polynomial approximation and applications to root isolation, numerical multipoint evaluation, and other problems
Creators: name: Moroz, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Symbolic Computation (cs.SC)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We present a new data structure to approximate accurately and efficiently a polynomial $f$ of degree $d$ given as a list of coefficients. Its properties allow us to improve the state-of-the-art bounds on the bit complexity for the problems of root isolation and approximate multipoint evaluation. This data structure also leads to a new geometric criterion to detect ill-conditioned polynomials, implying notably that the standard condition number of the zeros of a polynomial is at least exponential in the number of roots of modulus less than $1/2$ or greater than $2$.Given a polynomial $f$ of degree $d$ with $\|f\|_1 \leq 2^τ$ for $τ\geq 1$, isolating all its complex roots or evaluating it at $d$ points can be done with a quasi-linear number of arithmetic operations. However, considering the bit complexity, the state-of-the-art algorithms require at least $d^{3/2}$ bit operations even for well-conditioned polynomials and when the accuracy required is low. Given a positive integer $m$, we can compute our new data structure and evaluate $f$ at $d$ points in the unit disk with an absolute error less than $2^{-m}$ in $\widetilde O(d(τ+m))$ bit operations, where $\widetilde O(\cdot)$ means that we omit logarithmic factors. We also show that if $κ$ is the absolute condition number of the zeros of $f$, then we can isolate all the roots of $f$ in $\widetilde O(d(τ+ \log κ))$ bit operations. Moreover, our algorithms are simple to implement. For approximating the complex roots of a polynomial, we implemented a small prototype in \verb|Python/NumPy| that is an order of magnitude faster than the state-of-the-art solver \verb/MPSolve/ for high degree polynomials with random coefficients.
Symmetry considerations on the magnetization process of the Heisenberg model on the pyrochlore lattice
Creators: name: Penc, Karlo
name: Shannon, Nic
name: Motome, Yukitoshi
name: Shiba, Hiroyuki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a detailed symmetry analysis of the degeneracy lifting due to higher order spin exchanges in the pyrochlore lattice in applied magnetic field. Under the assumption of the 4 sublattice ordering, the criteria for a stable half-magnetization plateau are deduced. The higher order exchange terms may originate from spin-lattice coupling, or can describe quantum and thermal fluctuations.
description: 10 pages, 4 figures, submitted to "Highly Frustrated Magnetism 2006" conference in Osaka
Noise-induced Turbulence in Nonlocally Coupled Oscillators
Creators: name: Kawamura, Yoji
name: Nakao, Hiroya
name: Kuramoto, Yoshiki
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We demonstrate that nonlocally coupled limit-cycle oscillators subject to spatiotemporally white Gaussian noise can exhibit a noise-induced transition to turbulent states. After illustrating noise-induced turbulent states with numerical simulations using two representative models of limit-cycle oscillators, we develop a theory that clarifies the effective dynamical instabilities leading to the turbulent behavior using a hierarchy of dynamical reduction methods. We determine the parameter region where the system can exhibit noise-induced turbulent states, which is successfully confirmed by extensive numerical simulations at each level of the reduction.
description: 23 pages, 17 figures, to appear in Phys. Rev. E
Assessment of the Impact of Heart Failure on Household Economic Well-being: Background and Methods- Gujarati version
Creators: name: Harikrishnan, Sivadasanpillai
name: Ganapathi, Sanjay
name: Reethu Salim
name: Bahl, Ajay
name: Katageri, Anand
name: Animesh Mishra
name: Anoop George Alex
name: Bhavesh Roy
name: Cholenahally Nanjappa Manjunath
name: Negi, Prakash C
name: Durgaprasad Rajasekhar
name: Rishi Sethi
name: Satyanarayan Routray
name: Radhakrishnan Shanmugasundaram
name: Sumanta Shekhar Padhi
name: Syam Sunder Reddy
name: Panniyammakal Jeemon
Publisher: name: figshare
Year: 2021
Subjects: subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: FOS: Clinical medicine

description: Background and rationale: Heart failure (HF), which is an emerging public health issue, adversely affects the strained health system in India. The potential adverse impact of HF on the economic well-being of affected individuals and their families is narrated in various anecdotal reports. Further, HF is known to push the affected individuals and their dependents into poverty. However, there is limited research quantifying how HF impacts the economic well-being of households from the low and middle-income countries. Methods: We describe the methods of a detailed economic impact assessment of HF at the household level in India. The economic impact study in HF is initiated across 20 centres in India. The selected centres represent different regions in India stratified based on the prevailing stage of epidemiological transition levels (ETLs). We will collect data from 1800 patients with acute decompensated HF and within 6-15 months of follow-up from the time of initial admission. The data that we intend to collect will consist of a) household healthcare expenditure including out-of-pocket expenditure, b) financing mechanisms used by households and (c) the impoverishing effects of health expenditures including distress financing and catastrophic health expenditure. Trained staff at each centre will collect relevant data by using a validated and structured interview schedule. The study will have 80% power, after accounting for five percent non-response rate, to test eight percent difference in primary outcome (proportion of families under distress financing) between different ETLs. Impact: The results from the study will help policy makers in understanding the micro-economic impact of HF in India and aid in allocation of appropriate resources for prevention and control of HF.
New techniques for pointed Hopf algebras
Creators: name: Andruskiewitsch, N.
name: Fantino, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16W30, 17B37

description: We present techniques that allow to decide that the dimension of some pointed Hopf algebras associated with non-abelian groups is infinite. These results are consequences of arXiv:0803.2430v1. We illustrate each technique with applications.
description: 29 pages, small changes
Προσδιορισμός ωκυτοκίνης σε πλάσμα αίματος κατά τη διάρκεια αποτοξίνωσης χρόνιων χρηστών ηρωίνης
Creators: name: Ντότσικα, Σπυριδούλα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ωκυτοκίνη
Αποτοξίνωση
Άγχος
Oxytocin
Detoxification
Stress

description: Στην παρούσα εργασία πραγματοποιήθηκε προσδιορισμός της συγκέντρωσης της ωκυτοκίνης σε πλάσμα αίματος χρονίων χρηστών ηρωίνης, οι οποίοι εισήλθαν σε πρόγραμμα απεξάρτησης 21 ημερών, με στόχο τη συσχέτιση της ωκυτοκίνης με το άγχος που προκαλείται κατά την απεξάρτηση και την επιτυχία της απεξάρτησης, δηλαδή την ολοκλήρωση του προγράμματος. Για τον προσδιορισμό χρησιμοποιήθηκε η τεχνική της ανταγωνιστικής δοκιμασίας ενζυμο-συζευγμένης ανοσοπροσρόφησης, ELISA. Οι χρήστες συμμετείχαν εθελοντικά, ήταν άρρενες μεταξύ 18 και 65 ετών και έδωσαν βιολογικό υλικό την ημέρα 2, στο αποκορύφωμα του στερητικού τους συνδρόμου και την ημέρα 20 όταν το στερητικό σύνδρομο είχε αποδράμει. Τα 57 άτομα που συμμετείχαν στην έρευνα, χωρίστηκαν σε δύο ομάδες. Αυτοί που ολοκλήρωσαν το πρόγραμμα απεξάρτησης και αυτοί που αποχώρησαν. Μεταξύ των δύο ομάδων η μέση συγκέντρωση ωκυτοκίνης στο πλάσμα παρουσίασε σημαντική διαφορά. Όσοι αποχώρησαν από το πρόγραμμα παρουσίασαν υψηλότερα επίπεδα ωκυτοκίνης
description: In the present study, determination of the oxytocin’s concentration in plasma of chronic heroin users was performed, who entered a 21-day rehabilitation program and it aimed at correlating oxytocin with the anxiety caused by opioid detoxification and the successful rehabilitation, that is the completion of the program. For the determination, the competitive enzyme-linked immunosorbent assay (ELISA) was used. Drug users participated voluntarily, were males between 18 and 65 years old and gave biological material on day 2 at the peak of the withdrawal syndrome and on day 20 when the withdrawal syndrome had gone. Among the 57 people who participated in the survey, two groups were created. Those who completed the rehabilitation program and those who left it. Between the two groups the mean plasma oxytocin concentration was significantly different. Those who left the program showed higher levels of oxytocin
Observations of the Hot Horizontal-Branch Stars in the Metal-Rich Bulge Globular Cluster NGC 6388 - Indications of Helium Enrichment and a Lesson in Crowded Field Spectroscopy
Creators: name: Moehler, S.
name: Sweigart, A. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) The metal-rich bulge globular cluster NGC6388 shows a distinct blue horizontal-branch tail with a strong upward tilt in its colour-magnitude diagram. Several noncanonical scenarios have been proposed to explain these puzzling observations. In order to test the predictions of these scenarios, we have obtained medium resolution spectra to determine the atmospheric parameters of a sample of the blue HB stars in NGC 6388. Using the medium resolution spectra, we determine effective temperatures, surface gravities and helium abundances by fitting the observed Balmer and helium lines with appropriate theoretical stellar spectra. As we know the distance to the cluster, we can verify our results by determining masses for the stars. During the data reduction we took special care in subtracting the background, which is dominated by the overlapping spectra of cool stars. The physical parameters of the blue HB stars near 10,000 K support the helium pollution scenario. The low gravities and masses found for the hot blue tail stars, however, are probably caused by problems with the data reduction, most likely due to remaining background light in the spectra, which would affect the fainter hot blue tail stars much more strongly than the brighter cool blue tail stars. Our study of the hot blue tail stars in NGC 6388 illustrates the obstacles which are encountered when attempting to determine the atmospheric parameters of hot HB stars in very crowded fields using ground-based observations. We discuss these obstacles and offer possible solutions for future projects.
description: 11 pages, 9 figures (finding charts as png only), uses aa.cls; accepted for publication in A&A
Discussion: Conditional growth charts
Creators: name: Carroll, Raymond J.
name: Ruppert, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Discussion of Conditional growth charts [math.ST/0702634]
description: Published at http://dx.doi.org/10.1214/009053606000000641 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Singularities of varying light speed cosmologies
Creators: name: Miritzis, John
name: Cotsakis, Spiros
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the possible singularities of isotropic cosmological models that have a varying speed of light as well as a varying gravitational constant. The field equations typically reduce to two dimensional systems which are then analyzed both by dynamical systems techniques in phase space and by applying the method of asymptotic splittings. In the general case we find initially expanding closed models which recollapse to a future singularity and open universes that are eternally expanding towards the future. The precise nature of the singularities is also discussed.
description: 7 pages, 2 figures, uses iop style files, to appear in the Proceedings of the Greek Relativity Meeting NEB12, June 29-July 2, 2006, Nauplia, Greece