cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stealing the poet's voice: re-reading Propertian elegy through Cynthia and Acanthis
Creators: name: Wise, Jessica
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Propertian elegy presents a battle of speech, in which the male poet-lover tries to win his puella's affection with poetry. In Book Four, two particular women, the lena Acanthis in 4.5 and Cynthia in 4.7, hijack the dominant voice of the male speaker and impose their own feminine point of view onto the relationship. In this paper, I examine the manner in which Propertius purposely inserts these authoritative female voices into his final book of elegy in order to force a radical re-reading of his prior three books of poetry. First, I examine the manner in which Acanthis usurps verses from the rest of the Propertian corpus and uses them against the poet-lover, undermining the authority of his verse. Next, I examine Cynthia's autonomous speech in 4.7 and her dissenting account of the relationship. These new voices encourage a re-reading from the perspective of the elegiac puella.
Mutants of compactified representations revisited
Creators: name: Franz, Matthias
name: de Medrano, Santiago López
name: Malik, John
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57S25 (Primary), 14P25, 17A35, 57R91 (Secondary)

description: We show that the mutants of compactified representations constructed by Franz and Puppe can be written as intersections of real quadrics involving division algebras and as generalizations of polygon spaces. We also show that these manifolds are connected sums of products of spheres.
description: 14 pages
Schäden durch Winterstürme - das Schadensrisiko von Wohngebäuden in Baden-Württemberg
Creators: name: Heneka, Patrick
Publisher: name: Universitätsverlag Karlsruhe
Year: 2007
Subjects: Risiko
Sturmschaden
Baden-Württemberg
Orkan
Schadensanalyse
Modellierung
Windklima
Anfälligkeit
Windgeschwindigkeit
Schadensverteilung

description: In der vorliegenden Arbeit wird die Schadensanfälligkeit von privaten Wohngebäuden durch Winterstürme untersucht und es wird eine Abschätzung des individuellen Schadensrisikos für jede Gemeinde in Baden-Württemberg angegeben. Dazu wird ein Modell entwickelt, mit dem die Schadensanfälligkeit von Gebäuden durch Stürme simuliert werden kann.
The dust covering factor in active galactic nuclei
Creators: name: Stalevski, Marko
name: Ricci, Claudio
name: Ueda, Yoshihiro
name: Lira, Paulina
name: Fritz, Jacopo
name: Baes, Maarten
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The primary source of emission of active galactic nuclei (AGN), the accretion disk, is surrounded by an optically and geometrically thick dusty structure ("the so-called dusty torus"). The infrared radiation emitted by the dust is nothing but a reprocessed fraction of the accretion disk emission, so the ratio of the torus to the AGN luminosity ($L_{\text{torus}}/L_{\text{AGN}}$) should correspond to the fraction of the sky obscured by dust, i.e. the covering factor. We undertook a critical investigation of the $L_{\text{torus}}/L_{\text{AGN}}$ as the dust covering factor proxy. Using state-of-the-art 3D Monte Carlo radiative transfer code, we calculated a grid of spectral energy distributions (SEDs) emitted by the clumpy two-phase dusty structure. With this grid of SEDs, we studied the relation between $L_{\text{torus}}/L_{\text{AGN}}$ and the dust covering factor for different parameters of the torus. We found that in the case of type 1 AGNs the torus anisotropy makes $L_{\text{torus}}/L_{\text{AGN}}$ underestimate low covering factors and overestimate high covering factors. In type 2 AGNs $L_{\text{torus}}/L_{\text{AGN}}$ always underestimates covering factors. Our results provide a novel easy-to-use method to account for anisotropy and obtain correct covering factors. Using two samples from the literature, we demonstrated the importance of our result for inferring the obscured AGN fraction. We found that after the anisotropy is properly accounted for, the dust covering factors show very weak dependence on $L_{\text{AGN}}$, with values in the range of $\approx0.6-0.7$. Our results also suggest a higher fraction of obscured AGNs at high luminosities than those found by X-ray surveys, in part owing to the presence of a Compton-thick AGN population predicted by population synthesis models.
description: Published in MNRAS. V2: references updated and typos corrected, to match the published version
Temperature responsive behavior of polymer brush/polyelectrolyte multilayer composites
Creators: name: Micciulla, Samantha
name: Soltwedel, Olaf
name: Löhmann, Oliver
name: Klitzing, Regine Von
Publisher: name: Technische Universität Berlin
Year: 2016
Subjects: subject: 530 Physik

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: The complex interaction of polyelectrolyte multilayers (PEMs) physisorbed onto end-grafted polymer brushes with focus on the temperature-responsive behavior of the system is addressed in this work. The investigated brush/multilayer composite consists of a poly(styrene sulfonate)/poly(diallyldimethylammonium chloride) (PSS/PDADMAC) multilayer deposited onto the poly(N-isopropylacrylamide-b-dimethylaminoethyl methacrylate) P(NIPAM-b-DMAEMA) brush. Ellipsometry and neutron reflectometry were used to monitor the brush collapse with the thickness decrease as a function of temperature and the change in the monomer distribution perpendicular to the substrate at temperatures below, across and above the phase transition, respectively. It was found that the adsorption of PEMs onto polymer brushes had a hydrophobization effect on PDMAEMA, inducing the shift of its phase transition to lower temperatures, but without suppressing its temperature-responsiveness. Moreover, the diffusion of the free polyelectrolyte chains inside the charged brush was proved by comparing the neutron scattering length density profile of pure and the corresponding PEM-capped brushes, eased by the enhanced contrast between hydrogenated brushes and deuterated PSS chains. The results presented herein demonstrate the possibility of combining a temperature-responsive brush with polyelectrolyte multilayers without quenching the responsive behavior, even though significant interpolyelectrolyte interactions are present. This is of importance for the design of multicompartment coatings, where the brush can be used as a reservoir for the controlled release of substances and the multilayer on the top as a membrane to control the diffusion in/out by applying different stimuli.
Adjuvant Therapy of Chinese Herbal Medicine for the Treatment of Adenomyosis: A systematic review protocol
Creators: name: Huang, Li
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Alternative and Complementary Medicine
subject: Medicine and Health Sciences
subject: Adenomyosis
subject: Levonorgestrel-releasing intrauterine system

description: Adenomyosis is benign gynecologic condition with complex etiologies. Common symptoms associated with adenomyosis include menorrhagia, dysmenorrhea, chronic pelvic pain, metrorrhagia and dyspareunia. Although Chinese herbal medicine (CHM) has often been utilized for managing adenomyosis in clinical practice in China, evidence regarding its efficacy is lacking. This systematic review protocol aims to describe a systematic review to assess the effectiveness and safety of CHM combined with Levonorgestrel-releasing intrauterine system（LNG-IUS） for AM.
Contradiction in Culture: Cultural Capital or Oppositional Culture?
Creators: name: Kozlowski, Karen Phelan
Publisher: name: University of North Carolina at Chapel Hill
Year: 2011

description: This study offers a new angle on the study of minority education by examining how student-teacher perceptions of student effort are patterned by race. Educational achievement is unquestionably patterned by race such that aside from Asian students, students of color get lower grades and test scores than white students. Many researchers who study the cultural component of this problem do so under one of two theoretical frameworks: oppositional peer culture or cultural capital mismatch. However, most studies that look at cultural explanations for outcomes focus on student values of education, regardless of the fact that these theories are rooted in understanding and interpreting behavior. Using Swidler's toolkit framework for understanding culture, this study looks at how student-teacher dis/agreement about student work effort reflects either oppositional peer culture frameworks or cultural capital mismatch. I use cross sectional ELS survey data of 15,325 high school sophomores and their teachers to examine two categories of student-teacher dis/agreement: 1) student and teacher agree student is not working hard (oppositional culture) and 2) student thinks s/he is working hard but teacher disagrees (cultural capital mismatch). Using logistic regression, I examine demographic and school context predictors of being in these respective categories, as well as interactions between race/ethnicity and track placement. Results offer partial support for both oppositional culture and cultural capital mismatch. Oppositional behavior is found among black students in college prep math programs only and cultural capital mismatch is found for black, Hispanic, and American Indian/multiracial students.
ZeroSDN: A Highly Flexible and Modular Architecture for Full-range Network Control Distribution
Creators: name: Kohler, Thomas
name: Dürr, Frank
name: Rothermel, Kurt
Publisher: name: Universität Tübingen
Year: 2017
Subjects: subject: Software-defined networking
subject: 004

description: ZeroSDN: A Highly Flexible and Modular Architecture for Full-range Network Control Distribution
On a trilinear singular integral form with determinantal kernel
Creators: name: Gressman, Philip
name: He, Danqing
name: Kovač, Vjekoslav
name: Street, Brian
name: Thiele, Christoph
name: Yung, Po-Lam
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B20

description: We study a trilinear singular integral form acting on two-dimensional functions and possessing invariances under arbitrary matrix dilations and linear modulations. One part of the motivation for introducing it lies in its large symmetry groups acting on the Fourier side. Another part of the motivation is that this form stands between the bilinear Hilbert transforms and the first Calderón commutator, in the sense that it can be reduced to a superposition of the former, while it also successfully encodes the latter. As the main result we determine the exact range of exponents in which the ${L}^p$ estimates hold for the considered form.
description: 12 pages
A Master Course on Network Softwarization: Lectures and Practical Assignments
Creators: name: Hauser, Frederik
name: Schmidt, Mark
name: Menth, Michael
Publisher: name: Universität Tübingen
Year: 2017
Subjects: subject: Netzwerk
subject: 004
subject: Network Softwarization

description: A Master Course on Network Softwarization: Lectures and Practical Assignments
Observing the Epoch of Reionization with the Cosmic Microwave Background
Creators: name: Reichardt, Christian L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We review the observable consequences of the epoch of reionization (EoR) on the cosmic microwave background (CMB), and the resulting constraints on the EoR. We discuss how Thomson scattering with the free electrons produced during EoR equates to an optical depth for CMB photons. The optical depth measurements from the WMAP and Planck satellites, using large-scale CMB polarization power spectra, is one of the few current constraints on the timing of cosmic reionization. We also present forecasts for the precision with which the optical depth will be measured by future satellite missions. Second, we consider the kinematic Sunyaev-Zel'dovich (kSZ) effect, and how the kSZ power spectrum depends on the duration of reionization. We review current measurements of the kSZ power and forecasts for future experiments. Finally, we mention proposals to look for spectral distortions in the CMB that are related to the electron temperature at EoR, and ideas to map the variations in the optical depth across the sky.
description: Book chapter in "Understanding the Epoch of Cosmic Reionization: Challenges and Progress", Springer International Publishing, Ed. Andrei Mesinger, ISBN 978-3-319-21956-1
Resource allocation in the Grid. A market engineering approach
Creators: name: Schnizler, Björn
Publisher: name: Universitätsverlag Karlsruhe
Year: 2007
Subjects: Auktion
Grid Computing
Ressourcenallokation
Scheduling
Market-Engineering

description: The Grid provides access to distributed computational capabilities such as processors or storage space. One of the key problems is deciding which jobs are to be allocated to which resources at what time. In this context, the use of market mechanisms is a promising approach to solve these problems. This book proposes an auction mechanism for allocating computer resources which have multiple quality attributes and time constraints. The auction is evaluated by means of a numerical simulation.
Error control in the set-up of stereo camera systems for 3d animal tracking
Creators: name: Cavagna, Andrea
name: Creato, Chiara
name: Del Castello, Lorenzo
name: Giardina, Irene
name: Melillo, Stefania
name: Parisi, Leonardo
name: Viale, Massimiliano
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Three-dimensional tracking of animal systems is the key to the comprehension of collective behavior. Experimental data collected via a stereo camera system allow the reconstruction of the 3d trajectories of each individual in the group. Trajectories can then be used to compute some quantities of interest to better understand collective motion, such as velocities, distances between individuals and correlation functions. The reliability of the retrieved trajectories is strictly related to the accuracy of the 3d reconstruction. In this paper, we perform a careful analysis of the most significant errors affecting 3d reconstruction, showing how the accuracy depends on the camera system set-up and on the precision of the calibration parameters.
description: 14 pages, 9 figures
THE EFFECTS OF PARTIALLY STERILISING AGRICULTURAL SOILS WITH FORMALIN, AND OF APPLYING NITROGEN FERTILISERS, ON THE YIELDS AND N CONTENTS OF SPRING AND WINTER WHEAT, OF BARLEY AND OF GRASS , Rothamsted Experimental Station Report for 1969 Part 2
Creators: name: F. V. WIDDOWSON And A. PENNY
Publisher: name: Lawes Agricultural Trust
Year: 1970
Subjects: subject: rothamsted research
subject: crop yield
subject: Rothamsted ley-arable rotation experiment
subject: nitrogen
subject: formalin

description: Scanned PDF of THE EFFECTS OF PARTIALLY STERILISING AGRICULTURAL SOILS WITH FORMALIN, AND OF APPLYING NITROGEN FERTILISERS, ON THE YIELDS AND N CONTENTS OF SPRING AND WINTER WHEAT, OF BARLEY AND OF GRASS , part of Rothamsted Experimental Station Report for 1969 Part 2
The effect of foot type on star-excursion and time-to-boundary measures during single-leg stance balance tasks
Creators: name: Bonser, Robert Jeffrey
Publisher: name: University of North Carolina at Chapel Hill
Year: 2012

description: Objective: To determine if single-leg balance performance differs among individuals of different foot types using time-to-boundary (TTB) and Star Excursion Balance tests (SEBT). And to determine if there is a relationship between Foot Posture Index-6 (FPI-6) scores, TTB mean minima and SEBT scores. Subjects: 61 total subjects; 20 supinated, 21 neutral, 20 pronated. Measurements and Data: FPI-6 was used to classify foot type. TTB measurements in the medial/lateral and anterior/posterior direction were evaluated. SEBT maximum reach scores in the anterior, posteromedial, and posterolateral directions were also evaluated. Nine separate one-way ANOVAs, and a correlation matrix were used for statistical analysis. Results: A significant difference was found between pronated and neutral foot type for TTB mean minima in the medial/lateral direction. No significant differences were found between foot type for any other dependent variable. No significant relationships were discovered between FPI-6, SEBT, and TTB scores. Discussion: Pronated feet demonstrated better balance performance than neutral feet in the frontal plane, possibly due to a wider base of support. The SEBT and TTB scores have no relationship, thus measuring different aspects of balance performance.
On the variational interpretation of the discrete KP equation
Creators: name: Boll, Raphael
name: Petrera, Matteo
name: Suris, Yuri B.
Publisher: name: Technische Universität Berlin
Year: 2016
Subjects: subject: 510 Mathematik

description: We study the variational structure of the discrete Kadomtsev-Petviashvili (dKP) equation by means of its pluri-Lagrangian formulation. We consider the dKP equation and its variational formulation on the cubic lattice ZNas well as on the root latticeQ(AN). We prove that, on a lattice of dimension at least four, the corresponding Euler-Lagrange equations are equivalent to the dKP equation.
The Predictive Value of Quantitative Sensory Testing – A Systematic Review on Chronic Postoperative Pain and the Analgesic Effect of Pharmaceutical Therapies for Chronic Pain Patients
Creators: name: Larsen, Dennis
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Analgesic effect
subject: Chronic pain
subject: Quantitative sensory testing
subject: Surgery

description: Chronic postoperative pain and limited responses to pharmaceutical therapies are major clinical problems within pain. Quantitative sensory testing (QST) assesses sensory function and multiple studies have found difference in QST parameters comparing healthy subjects and patients with chronic pain. Studies have found associations between e.g. preoperative QST and chronic postoperative pain and pretreatment QST and response to pharmaceutical therapies. Previous reviews have focused on either surgery or pharmaceutical therapies in isolation 1–5 with the most recent reviews from 2017 (surgery) and 2013 (pharmaceutical therapies). Therefore, the current systematic review will review studies on QSTs predictive role for 1) chronic postoperative pain and 2) analgesic effect of pharmaceutical treatment for patients with chronic pain.
Discrete conformal maps: boundary value problems, circle domains, Fuchsian and Schottky uniformization
Creators: name: Bobenko, Alexander I.
name: Sechelmann, Stefan
name: Springborn, Boris
Publisher: name: Technische Universität Berlin
Year: 2016
Subjects: subject: 510 Mathematik

description: We discuss several extensions and applications of the theory of discretely conformally equivalent triangle meshes (two meshes are considered conformally equivalent if corresponding edge lengths are related by scale factors attached to the vertices). We extend the fundamental definitions and variational principles from triangulations to polyhedral surfaces with cyclic faces. The case of quadrilateral meshes is equivalent to the cross ratio system, which provides a link to the theory of integrable systems. The extension to cyclic polygons also brings discrete conformal maps to circle domains within the scope of the theory. We provide results of numerical experiments suggesting that discrete conformal maps converge to smooth conformal maps, with convergence rates depending on the mesh quality. We consider the Fuchsian uniformization of Riemann surfaces represented in different forms: as immersed surfaces in \mathbb {R}^{3}, as hyperelliptic curves, and as \mathbb {CP}^{1} modulo a classical Schottky group, i.e., we convert Schottky to Fuchsian uniformization. Extended examples also demonstrate a geometric characterization of hyperelliptic surfaces due to Schmutz Schaller.
Metal Enrichment in the Reionization Epoch
Creators: name: Ferrara, Andrea
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The presence of elements heavier than helium ("metals") is of fundamental importance for a large number of astrophysical processes occurring in planet, star and galaxy formation; it also affects cosmic structure formation and evolution in several ways. Even a small amount of heavy elements can dramatically alter the chemistry of the gas, opening the path to complex molecules. Metals might enhance the ability of the gas to radiate away its thermal energy, thus favoring the formation of gravitationally bound objects; they can also condensate in a solid phase (dust grains), partly or totally blocking radiation from luminous sources. Finally, they represent useful tracers of energy deposition by stars and probe the physical properties of the environment by absorption or emission lines. Last, but certainly not least, life -- as we know it on Earth -- is tightly related to the presence of at least some of the heavy elements. In this pedagogical review I will concentrate on the connection between early metal enrichment and cosmic reionization. As we will see these two processes are intimately connected and their joint study might turn out to be fundamental in understanding the overall evolution of the Universe during the first billion years after the Big Bang, an epoch corresponding to redshifts z>6.
description: Book chapter in Understanding the Epoch of Cosmic Reionization: Challenges and Progress, Springer International Publishing, Ed. Andrei Mesinger, ISBN 978-3-319-21956-1. arXiv admin note: text overlap with arXiv:astro-ph/0007248 by other authors
Supply Conditioning in Online Marketplaces: Learning and Incentives
Creators: name: Ozbay, Eren
Publisher: name: University of Illinois at Chicago
Year: 2023

description: We consider the problem of ensuring efficient matchmaking in online marketplaces where the qualities of value-providing supply units (e.g., sellers, workers, service providers) are unknown when they first join. We first model this as a stochastic multi-armed bandit problem: Given K arms, instead of maximizing the expected total reward from T pulls (the traditional “sum” objective), we consider the vector of total rewards earned from each of the K arms at the end of T pulls and aim to maximize the expected highest total reward across arms (the “max” objective). For this objective, we show that any policy must incur an instance-dependent asymptotic regret of Ω(logT) (with a higher instance-dependent constant compared to the traditional objective) and a worst-case regret of Ω(K^(1/3) T^(2/3)). We then generalize our algorithmic insights to the problem of maximizing the expected value of the average total reward of the top m arms with the highest total rewards. For both models, we design adaptive explore-then-commit policies and present numerical experiments that demonstrate their efficacy. We then consider a model where there are no centralized incentives that subsidize matchings which would allow the discovery of the qualities of new supply units and we inquire whether competitive forces in the market may generate adequate incentives for such (exploratory) behavior. We consider a fluid market in continuous time where new supply units arrive at some base information state and transition between information states as they get matched to a steady inflow of customers. (These information states could represent their publicly observable ratings, skill levels, etc.) We define a new market equilibrium notion called the local market equilibrium (LME), which characterizes the equilibrium prices and matchings arising in such markets. After proving the existence of the LME along with several structural and computational results, we present a comprehensive analysis of the performance under LME benchmarked against the optimal reward achieved by a centralized matching policy. We tightly characterize a novel market regularity condition under which the relative loss of the LME vs. the optimum is bounded below by the ratio of demand and supply. We define two broad classes of market instances in which the unique LME corresponds to system optimality, and additionally address the problem of designing optimal targeted price interventions that align the LME with the system-optimal solution.
Adapting Real Quantifier Elimination Methods for Conflict Set Computation
Creators: name: Jaroschek, Maximilian
name: Dobal, Pablo Federico
name: Fontaine, Pascal
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The satisfiability problem in real closed fields is decidable. In the context of satisfiability modulo theories, the problem restricted to conjunctive sets of literals, that is, sets of polynomial constraints, is of particular importance. One of the central problems is the computation of good explanations of the unsatisfiability of such sets, i.e.\ obtaining a small subset of the input constraints whose conjunction is already unsatisfiable. We adapt two commonly used real quantifier elimination methods, cylindrical algebraic decomposition and virtual substitution, to provide such conflict sets and demonstrate the performance of our method in practice.
Sentential or not? ‒ An Experimental Investigation on the Syntax of Fragments
Creators: name: Lemke, Robin
Publisher: name: Universität Tübingen
Year: 2017
Subjects: subject: Linguistik , Syntax , Experiment
subject: 400
subject: 420
subject: 430
subject: Fragments
subject: Ellipsis
subject: Syntax
subject: Experiment

description: This paper presents four experiments on the syntactic structure of fragments, i.e. nonsentential utterances with propositional meaning and illocutionary force (Morgan, 1973). The experiments evaluate the predictions of two competing theories of fragments: Merchant's (2004) movement and deletion account and Barton & Progovac's (2005) nonsentential account. Experiment 1 provides evidence for case connectivity effects, this suggests that there is indeed unarticulated linguistic structure in fragments (unlike argued by Barton & Progovac 2005). Experiments 2-4 address a central prediction of the movement and deletion account: only those constituents which may appear in the left periphery are possible fragments. Merchant et al. (2013) present two studies on preposition stranding and complement clause topicalization in favor of this. My experiments 2-4 replicate and extend these studies in German and English. Taken together, the acceptability pattern predicted by Merchant (2004) holds only for the preposition stranding data (exp. 2), but not for complement clauses (exp.3) or German multiple prefield constituents (exp.4).
Support to asylum seeker policies
Creators: name: Mancini, Tiziana
name: Caricati, Luca
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: The project investigated the relationships between ideologically conservative attitudes (social dominance orientation, SDO; right-wing authoritarianism, RWA), legitimizing myths (false belief in asylum seekers as bogus; perception of in-group threats), and citizens’ support for restricted reception and rejection of asylum policies in a sample of 539 people living in Italy.
Discrete Element Simulation of Transverse Cracking During the Pyrolysis of Carbon Fibre Reinforced Plastics to Carbon/Carbon Composites
Creators: name: Wittel, Falk K.
name: Schulte-Fischedick, Jan
name: Kun, Ferenc
name: Kroeplin, Bernd-H.
name: Friess, Martin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The fracture behavior of fiber-ceramics like C/C-SiC strongly depends on the initial damage arising during the production process. We study the transverse cracking of the 90° ply in [0/90]S cross-ply laminates due to the thermochemical degradation of the matrix material during the carbonization process by means of a discrete element method. The crack morphology strongly depends on the fiber-matrix interface properties, the transverse ply thickness as well as on the carbonization process itself. To model the 90° ply a two-dimensional triangular lattice of springs is constructed where nodes of the lattice represent fibers. Springs with random breaking thresholds model the disordered matrix material and interfaces. The spring-lattice is coupled by interface springs to two rigid bars which capture the two 0° plies or adjacent sublaminates in the model. Molecular dynamics simulation is used to follow the time evolution of the model system. It was found that under gradual heating of the specimen, after some distributed cracking, segmentation cracks occur in the 90° ply which then develop into a saturated state where the ply cannot support additional load. The dependence of the micro-structure of damage on the ply thickness and on the disorder in spring properties is also studied. Crack density and porosity of the system are monitored as a function of the temperature and compared to an analytic approach and experiments.
description: arXiv admin note: substantial text overlap with arXiv:cond-mat/0109231
$C_{n}$-moves and the difference of Jones polynomials for links
Creators: name: Nikkuni, Ryo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: The Jones polynomial $V_{L}(t)$ for an oriented link $L$ is a one-variable Laurent polynomial link invariant discovered by Jones. For any integer $n\ge 3$, we show that: (1) the difference of Jones polynomials for two oriented links which are $C_{n}$-equivalent is divisible by $\left(t-1\right)^{n}\left(t^{2}+t+1\right)\left(t^{2}+1\right)$, and (2) there exists a pair of two oriented knots which are $C_{n}$-equivalent such that the difference of the Jones polynomials for them equals $\left(t-1\right)^{n}\left(t^{2}+t+1\right)\left(t^{2}+1\right)$.
description: 13 pages, 11 figures
A Supervised Machine Learning Approach to Characterize Spinal Network Function
Creators: name: Whelan, Patrick
name: Dalrymple, Ashley
name: Sharples, Simon
name: Osachoff, Nathaniel
name: Lognon, Adam
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Life Sciences
subject: Neuroscience and Neurobiology
subject: canadian-open-neuroscience-platform
subject: machine learning
subject: networks
subject: spinal cord

description: Provides linked software to analyze spontaneous activity patterns
Single-stage, northeast-directed thrusting on the Laramide Beartooth fault
Creators: name: Nielsen, Timothy R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: This study focuses on the synkinematic sediments along the Beartooth thrust fault in order to assess both the Laramide paleostress history of the Beartooth uplift, and how far the Bighorn Basin's syn-orogenic deposits have been overridden. The sediments shed into the basin by the ascending Beartooth block were folded and overridden by the Beartooth thrust. In the vicinity of Red Lodge, MT, the Paleocene/Eocene sediments were overthrust 4-7 km, based on truncated alluvial fans. These sediments contain a population of two orthogonal systematic joint sets. The older of the two strikes NE-SW and the younger abutting set strikes NW-SE. These uncomplicated footwall joint-sets reflect the stress field of single-stage, northeast-directed thrusting on the Beartooth fault, and suggest that the stress field record did not include a purely E-W second stage of uplift, as proposed by previous researchers.
Non-Equispaced Grid Sampling in Photoacoustics with a Non-Uniform FFT
Creators: name: Schmid, Julian
name: Glatz, Thomas
name: Zabihian, Behrooz
name: Liu, Mengyang
name: Drexler, Wolfgang
name: Scherzer, Otmar
Publisher: name: arXiv
Year: 2015
Subjects: subject: Medical Physics (physics.med-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: To obtain the initial pressure from the collected data on a planar sensor arrangement in photoacoustic tomography, there exists an exact analytic frequency domain reconstruction formula. An efficient realization of this formula needs to cope with the evaluation of the data's Fourier transform on a non-equispaced mesh. In this paper, we use the non-uniform fast Fourier transform to handle this issue and show its feasibility in 3D experiments with real and synthetic data. This is done in comparison to the standard approach that uses linear, polynomial or nearest neighbor interpolation. Moreover, we investigate the effect and the utility of flexible sensor location to make optimal use of a limited number of sensor points. The computational realization is accomplished by the use of a multi-dimensional non-uniform fast Fourier algorithm, where non-uniform data sampling is performed both in frequency and spatial domain. Examples with synthetic and real data show that both approaches improve image quality.
description: arXiv admin note: substantial text overlap with arXiv:1501.02946
Evaluation of laser induced sarcomere microdamage: Role of damage extent and location in cardiomyocytes
Creators: name: Müller, Dominik
name: Klamt, Thorben
name: Gentemann, Lara
name: Heisterkamp, Alexander
name: Kalies, Stefan Michael Klaus
Publisher: name: San Francisco, California, US : PLOS
Year: 2021
Subjects: subject: Algorithms
subject: Animals
subject: Cell Differentiation
subject: Cells, Cultured
subject: Image Processing, Computer-Assisted
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: Whereas it is evident that a well aligned and regular sarcomeric structure in cardiomyocytes is vital for heart function, considerably less is known about the contribution of individual elements to the mechanics of the entire cell. For instance, it is unclear whether altered Z-disc elements are the reason or the outcome of related cardiomyopathies. Therefore, it is crucial to gain more insight into this cellular organization. This study utilizes femtosecond laserbased nanosurgery to better understand sarcomeres and their repair upon damage. We investigated the influence of the extent and the location of the Z-disc damage. A single, three, five or ten Z-disc ablations were performed in neonatal rat cardiomyocytes. We employed image-based analysis using a self-written software together with different already published algorithms. We observed that cardiomyocyte survival associated with the damage extent, but not with the cell area or the total number of Z-discs per cell. The cell survival is independent of the damage position and can be compensated. However, the sarcomere alignment/orientation is changing over time after ablation. The contraction time is also independent of the extent of damage for the tested parameters. Additionally, we observed shortening rates between 6-7% of the initial sarcomere length in laser treated cardiomyocytes. This rate is an important indicator for force generation in myocytes. In conclusion, femtosecond laser-based nanosurgery together with image-based sarcomere tracking is a powerful tool to better understand the Z-disc complex and its force propagation function and role in cellular mechanisms. Copyright:
MPEC 2023-F135 : 2014 JR2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
An ERC Starting Grant project on p-process nucleosynthesis concluded
Creators: name: Gyürky, Gy
name: Halász, Z
name: Szücs, T
name: Kiss, G G
name: Fülöp, Zs
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In 2008 a Starting Grant project supported by the European Research Council titled "Nuclear reaction studies relevant to the astrophysical p-process nucleosynthesis" was launched. After five years of successful research related to the experimental investigation of proton- and alpha-induced nuclear reaction for the astrophysical p-process, the project came to an end. In this paper a summary of the research and the most important achievements is given.
description: To appear in Journal of Physics: Conference Series, the proceedings of the Nuclear Physics in Astrophysics VI conference, Lisbon, Portugal, 2013. The version posted here is slightly modified compared to the published one
From dimensional regularization to NLO computations in four dimensions
Creators: name: Sborlini, German F. R.
name: Hernandez-Pinto, Roger
name: Rodrigo, German
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Loop-tree duality (LTD) allows to express virtual contributions in terms of phase-space integrals, thus leading to a direct mapping with real radiation terms. We review the basis of the method and describe its application to regularize Feynman integrals. Performing an integrand-level combination of real and virtual terms, we show how to recover physical results by simply taking the four-dimensional limit of $d$-dimensional expressions. Moreover, this method provides a natural physical interpretation of infrared singularities, their origin and the way that they cancel in the complete computation.
description: 7 pages, 1 figure. Contribution to the Proceedings of the EPS-HEP 2015 Conference
π-Conjugated stannole copolymers synthesised by a tin-selective Stille cross-coupling reaction
Creators: name: Ramirez Y Medina, Isabel-Maria
name: Rohdenburg, Markus
name: Rusch, Pascal
name: Duvinage, Daniel
name: Bigall, Nadja C.
name: Staubitz, Anne
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2021
Subjects: subject: Main-group elements
subject: optical properties
subject: 3rd-row atoms
subject: basis-sets
subject: polymers
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The synthesis of four well-defined conjugated polymers TStTT1-4 containing unusual heterocycle units in the main chain, namely stannole units as building blocks, is reported. The stannole-thiophenyl copolymers were generated by tin-selective Stille coupling reactions in nearly quantitative yields of 94% to 98%. NMR data show that the tin atoms in the rings remain unaffected. Weight-average molecular weights (Mw) were high (4900-10 900 Da and 9600-21 900 Da); and molecular weight distributions (Mw/Mn) were between 1.9 and 2.3. The new materials are strongly absorbing and appear blue-black to purple-black. All iodothiophenyl-stannole monomers St1-4 and the resulting bisthiophenyl-stannole copolymers TStTT1-4 were investigated with respect to their optoelectronic properties. The absorption maxima of the polymers are strongly bathochromically shifted compared to their monomers by about 76 nm to 126 nm in chloroform. Density functional theory calculations support our experimental results of the single stannoles St1-4 showing small HOMO-LUMO energy gaps of 3.17-3.24 eV. The optical band gaps of the polymers are much more decreased and were determined to be only 1.61-1.79 eV. Furthermore, both the molecular structures of stannoles St2 and St3 from single crystal X-ray analyses and the results of the geometry optimisation by DFT confirm the high planarity of the molecules backbone leading to efficient conjugation within the molecule.
The geometry of thresholdless active flow in nematic microfluidics
Creators: name: Green, Richard
name: Toner, John
name: Vitelli, Vincenzo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: "Active nematics" are orientationally ordered but apolar fluids composed of interacting constituents individually powered by an internal source of energy. When activity exceeds a system-size dependent threshold, spatially uniform active apolar fluids undergo a hydrodynamic instability leading to spontaneous macroscopic fluid flow. Here, we show that a special class of spatially non-uniform configurations of such active apolar fluids display laminar (i.e., time-independent) flow even for arbitrarily small activity. We also show that two-dimensional active nematics confined on a surface of non-vanishing Gaussian curvature must necessarily experience a non-vanishing active force. This general conclusion follows from a key result of differential geometry: geodesics must converge or diverge on surfaces with non-zero Gaussian curvature. We derive the conditions under which such curvature-induced active forces generate "thresholdless flow" for two-dimensional curved shells. We then extend our analysis to bulk systems and show how to induce thresholdless active flow by controlling the curvature of confining surfaces, external fields, or both. The resulting laminar flow fields are determined analytically in three experimentally realizable configurations that exemplify this general phenomenon: i) toroidal shells with planar alignment, ii) a cylinder with non-planar boundary conditions, and iii) a "Frederiks cell" that functions like a pump without moving parts. Our work suggests a robust design strategy for active microfluidic chips and could be tested with the recently discovered "living liquid crystals".
description: The rewritten paper has several changes, principally: 1. A separate section III for two-dimensional curved systems, illustrated with an new example. 2. Remarks about the relevance of the frozen director approximation in the case of weak nematic order; and 3. A separate Supplemental Material document, containing material previously in the Appendix, along with additional material
Cosmic Reionization and the First Nonlinear Structures in the Universe
Creators: name: Haiman, Zoltán
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this introductory chapter, we outline expectations for when and how the hydrogen and helium atoms in the universe turned from neutral to ionized, focusing on the earliest, least well understood stages, and emphasizing the most important open questions. We include a historical summary, and highlight the role of reionization as one of the few milestones in the evolution of the universe since the Big Bang, and its status as a unique probe of the beginning stages of structure formation.
description: 21 pages with 157 references. Book chapter in "Understanding the Epoch of Cosmic Reionization: Challenges and Progress", Springer International Publishing, Ed. Andrei Mesinger, ISBN 978-3-319-21956-1
Break-even Analysis of Medicaid versus Fee for Service in Orthodontic Practice: North Carolina as a Case Study
Creators: name: Murdock, John Edmon
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: The purpose of this study was to examine the potential profitability of treating patients covered by Medicaid in NC orthodontic practices using the break-even analysis. Questionnaires were mailed to 154 orthodontists in active practice in NC. Respondents were categorized into 4 groups based upon the number of 2005 Medicaid case starts. On a per case basis, assuming the break-even point had not been reached, three groups realized a potential profit for each Medicaid case treated. For each of the groups analyzed the inclusion of 5% Medicaid cases in the treatment pool did not substantially increase the practice break-even point. Assuming the break-point had been reached, all groups realized per case profits for each Medicaid case treated. Once the break-even point is reached, the inclusion of a small percentage of Medicaid patients can increase practice profitability while helping to address the current challenges with improving access to care for underserved populations.
A Measurement of Charter School Efficiency in North Carolina Utilizing Modified Quadriform Analysis
Creators: name: Sturdevant, Daniel
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: Charter schools exist under the umbrella of public education, but are not subject to the same level of public oversight or accountability measures as traditional public schools in North Carolina and many other states (BiFulco and Ladd, 2006, Bettinger, 2004). There is a lack of easily accessible efficiency data on charter schools. The primary aim of this study was to establish if the modified quadriform analysis could be used to assess charter school efficiency. Second, the study sought to assess relative efficiency within the population of charter schools in North Carolina, and to establish their rankings in context with one another, so that alterable school characteristics could be analyzed to see which contribute most to efficiency. The study employed the modified quadriform analysis (MQA), which is based upon plotting the residual data from a multiple variable regression of input and output variables, and then categorizing the graphed data based upon the input/output relationship. The study concluded that the MQA is a viable means for assessing charter school efficiency, and that efficient charter schools in North Carolina are correlated with higher pupil-teacher ratios, higher numbers of guidance counselors, and higher measures of community wealth.
Prediction model of band-gap for AX binary compounds by combination of density functional theory calculations and machine learning techniques
Creators: name: Lee, Joohwi
name: Seko, Atsuto
name: Shitara, Kazuki
name: Tanaka, Isao
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Machine learning techniques are applied to make prediction models of the G0W0 band-gaps for 156 AX binary compounds using Kohn-Sham band-gaps and other fundamental information of constituent elements and crystal structure as predictors. Ordinary least square regression (OLSR), least absolute shrinkage and selection operator (LASSO) and non-linear support vector regression (SVR) methods are applied with several levels of predictor sets. When the Kohn-Sham band-gap by GGA (PBE) or modified Becke-Johnson (mBJ) is used as a single predictor, OLSR model predicts the G0W0 band-gap of a randomly selected test data with the root mean square error (RMSE) of 0.54 eV. When Kohn-Sham band gap by PBE and mBJ methods are used together with a set of various forms of predictors representing constituent elements and crystal structures, RMSE decreases significantly. The best model by SVR yields the RMSE of 0.18 eV. A large set of band-gaps estimated in this way should be useful as predictors for materials exploration.
description: 24 pages, 6 figures, submitted to Phys. Rev. B