cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The interplay between tissue healing and bone remodeling around immediately loaded tooth replacement implants
Creators: name: Irandoust, Soroush
name: Muftu, Sinan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Medical Physics (physics.med-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Long-term bone healing/adaptation after a dental implant treatment starts with diffusion of mesenchymal stem cells to the fracture callus and their subsequent differentiation. The healing phase is followed by the bone-remodeling phase. In this work, a mechano-regulatory cellular differentiation model was used to simulate tissue healing around an immediately loaded dental implant. All tissue types were modeled as poroelastic in the healing phase. Material properties of the healing region were updated after each loading cycle for 30 cycles (days). The tissue distribution in the healed state was then used as the initial condition for the remodeling phase during which regions healed into bone adapt their internal density with respect to a homeostatic remodeling stimulus. The short- and long-term effects of micro-motion on bone healing and remodeling were studied. Development of soft tissue was observed both in the coronal region due to high fluid velocity, and on the vertical sides of the healing-callus due to high shear stress. In cases with small implant micromotion, tissue between the implant threads differentiated into bone during the healing phase, but resorbed during remodeling. In cases with large implant micromotion, higher percentage of the healing region differentiated into soft tissue resulting in less volume available for bone remodeling. But, the remaining bone region developed higher density bone tissue. It was concluded that an optimal range of controlled micromotion could be designed for a given implant in order to achieve the desired functional properties.
Cellular Automaton Rule184++C. A Simple Model for the Complex Dynamics of Various Particles Flow
Creators: name: Awazu, A.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: A cellular automaton named Rule 184++C is proposed as a meta-model to investigate the flow of various complex particles. In this model, unlike the granular pipe flow and the traffic flow, not only the free-jam phase transition but also the free-intermediate, the intermediate-jam, and the dilute-dense phase transitions appear. Moreover, the freezing phenomena appear if the system contains two types of different particles.
description: 9 papers, 7 figures
title: Simulation of the space debris environment in LEO using an analytical approach
Creators: name: Kebschull, Christopher
name: Scheidemann, Philipp
name: Hesselbach, Sebastian
name: Radtke, Jonas
name: Braun, Vitali
name: Krag, Holger
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2014
Subjects: subject: Evolution
subject: Space debris environment
subject: Analytical approach
subject: 620
subject: 520

description: Several numerical approaches exist to simulate the evolution of the space debris environment. These simulations usually rely on the propagation of a complete population of objects in order to determine the collision probability for each object. Using a Monte Carlo (MC) approach the chances for events, such as explosions and collisions, are triggered based on an assumed probability distribution. So in many different scenarios different objects are fragmented and contribute to a different version of the space debris environment. Finally, the results of the different scenarios are averaged to get a statistically significant estimation. This method is computationaly very expensive due to the propagation of the objects and the application of the MC method.
At the Institute of Aerospace Systems (ILR) an analytical model capable of describing the evolution of the space debris environment has been developed and implemented. The model is based on source and sink mechanisms, where yearly launches as well as collisions and explosions are considered as sources. The natural decay and post mission disposal measures are the only sink mechanisms. This method reduces the computational costs tremendously. In order to achieve this benefit a few simplifications have been applied. The approach of the model partitions the LEO into altitude shells. Only two kinds of objects are considered, intact bodies and fragments, which are also divided into diameter bins. As an extension to the previously presented model the eccentricity has additionally been taken into account with 67 eccentricity bins. While a set of differential equations has been implemented in a generic manner, the Euler method has been chosen to integrate the equations for a given time span. For this paper parameters have been chosen so that the model is able to reflect the results of the numerical MC-based simulation LUCA, which is also being developed at the ILR. The evolution of the population in LEO for a 200 years time span is shown and compared for both approaches using step sizes of 1 year. For selected objects in LEO the flux and environmental criticality values are shown. In conclusion the field of application for such a fast analytical model is shown.
title: A simplified approach to analyze the space debris evolution in the low earth orbit
Creators: name: Kebschull, Christopher
name: Braun, Vitali
name: Flegel, S.
name: Reihs, B.
name: Hesselbach, Sebastian
name: Gelhaus, J.
name: Möckel, M.
name: Radtke, Jonas
name: Wiedemann, C.
name: Krag, Holger
name: Vörsmann, P.
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2014
Subjects: subject: Analytical model
subject: Evolution
subject: Space debris
subject: 620
subject: 520

description: During the past 60 years the number of objects on Earth orbits has increased. So has the risk of collisions, which is likely to be the main driver for space debris generation in the future. This is important, for example, in densely populated regions like the sun-synchronous orbit at around 800 km altitude. In order to predict the future development of the debris environment numerical simulations can be used. These simulations are usually based on initial assumptions like the launch rate, the probability distribution of success of post mission disposal measures and the likelihood for catastrophic collisions. The computationally expensive Monte-Carlo method is employed for the random sampling of the defined events. Additionally, a propagator needs to process the objects to determine potential
collision partners, increasing the demand for computing power even further. In this paper an analytical model is presented, which is based on source and sink mechanisms, like launches, collisions and explosions. In this approach
different altitude shells and diameter bins, as well as four different object classes for intact objects and fragments, each on circular and eccentric orbits are considered. By using pre-computed tables for orbital lifetimes and decay
rates, both the computational effort and complexity of the model are decreased. The model can be adjusted to reflect different forecasts by altering the decay and collision rates. The paper concludes by showing preliminary results and a discussion of the generic approach, which allows the model to be fitted against more computationally expensive Monte-Carlo simulations.
title: Deriving a priority list based on the environmental criticality
Creators: name: Kebschull, Christopher
name: Radtke, Jonas
name: Krag, Holger
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2014
Subjects: subject: Priority list
subject: Active debris removal
subject: Space debris
subject: Evolution
subject: Analytical model
subject: 62
subject: 520

description: The collision of Iridium 33 and Cosmos 2251 as well as the fragmentation of Fengyun 1C showed the consequences such events can have for the space debris environment. In order to avoid future fragmentations disused satellites and rocket bodies should be removed from orbit to reduce the buildup of new space debris, as suggested by the Space Debris Mitigation Guidelines. For objects that are posing great risk of being fragmented and thus generating new fragments, but are unable to maneuver, active debris removal missions can be considered. Such elaborate and costly missions have to be planned carefully so they unfold the required effect on the space debris environment. For the
selection of target objects priority lists can be compiled, ranking the objects by urgency of removal. The ranking of the objects depends on the criteria that are chosen to be applied. For example it is common to estimate the flux an object is exposed to, or based on its mass the impact it has on the environment when fragmented, or even a combination of both. In this paper a criteria called environmental criticality (EC) is used to generate a new priority list based on the current catalogue of on orbit objects. The EC is defined as a product of the risk of fragmentation and the impact the fragmentation has on the space debris environment. Because the impact on the overall population for the given time span of 300 years is evaluated an analysis of the fragmentation in every year is necessary. This
approach puts great computational constraints on the traditional Monte-Carlo based simulations of the future space debris environment. For this reason a new simulation tool based on an analytical model, which has been developed at the Institute of Aerospace Systems, is used to estimate the impact of a given fragmentation on the future space
debris environment. A metric for the interpretation of the results of the criticality is proposed. The ranking objects is compared to lists, which have been derived based on different criteria.
Light neutrino propagation in matter without heavy neutrino decoupling
Creators: name: del Aguila, F.
name: Zralek, M.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the propagation of light neutrinos in matter assuming that their mixing with heavy neutrinos is close to present experimental limits. The phenomenological implications of the non-unitarity of the light neutrino mixing matrix for neutrino oscillations are discussed. In particular we show that the resonance effect in neutrino propagation in matter persists, but for slightly modified values of the parameters and with the maximum reduced by a small amount proportional to the mixing between light and heavy neutrinos squared.
description: 11 pages, 1 figure, contribution to Stefan Pokorski 60th birthday
title: Braunschweigisches Adreßbuch für das Jahr 1924
Creators: name: :None
Publisher: name: Meyer
Year: 1924
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Stadt Braunschweig
subject: 902

description: Braunschweigisches Adreßbuch, vol. 1924
Ephutomorpha pallidicornis
Creators: name: Brothers, Denis J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Ephutomorpha
Ephutomorpha pallidicornis

description: Ephutomorpha pallidicornis (Smith, 1879); Australia
 Mutilla pallidicornis Smith, 1879: 202; ♀.
 Ephutomorpha pallidicornis (Smith, 1879); André 1902b.
description: Published as part of Brothers, Denis J., 2022, Critical analysis of the type material of Mutillidae described from the Australasian Region (Hymenoptera), pp. 1-215 in Zootaxa 5140 (1) on page 202, DOI: 10.11646/zootaxa.5140.1.1, http://zenodo.org/record/6572181
Giles et al HF SR Supplementary content 3 final 9-May-18
Creators: name: Giles, Lucia
name: Freeman, Caroline
name: Field, Polly
name: Sörstadius, Elisabeth
name: Kartman, Bernt
Publisher: name: figshare
Year: 2019
Subjects: subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: FOS: Clinical medicine

description: Giles et al. Humanistic burden and economic impact of heart failure: a systematic review of the literature – PRISMA checklist
Patterns of primes in the Sato-Tate conjecture
Creators: name: Gillman, Nate
name: Kural, Michael
name: Pascadi, Alexandru
name: Peng, Junyao
name: Sah, Ashwin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Fix a non-CM elliptic curve $E/\mathbb{Q}$, and let $a_E(p) = p + 1 - \#E(\mathbb{F}_p)$ denote the trace of Frobenius at $p$. The Sato-Tate conjecture gives the limiting distribution $μ_{ST}$ of $a_E(p)/(2\sqrt{p})$ within $[-1, 1]$. We establish bounded gaps for primes in the context of this distribution. More precisely, given an interval $I\subseteq [-1, 1]$, let $p_{I,n}$ denote the $n$th prime such that $a_E(p)/(2\sqrt{p})\in I$. We show $\liminf_{n\to\infty}(p_{I,n+m}-p_{I,n}) < \infty$ for all $m\ge 1$ for "most" intervals, and in particular, for all $I$ with $μ_{ST}(I)\ge 0.36$. Furthermore, we prove a common generalization of our bounded gap result with the Green-Tao theorem. To obtain these results, we demonstrate a Bombieri-Vinogradov type theorem for Sato-Tate primes.
description: 26 pages
Scalar Fields and the FLRW Singularity
Creators: name: Sloan, David
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The dynamics of multiple scalar fields on a flat FLRW spacetime can be described entirely as a relational system in terms of the matter alone. The matter dynamics is an autonomous system from which the geometrical dynamics can be inferred, and this autonomous system remains deterministic at the point corresponding to the singularity of the cosmology. We show the continuation of this system corresponds to a parity inversion at the singularity, and that the singularity itself is a surface on which the space-time manifold becomes non-orientable.
description: 17 pages, 1 figure
Symplectomorphism groups and almost complex structures
Creators: name: McDuff, Dusa
Publisher: name: arXiv
Year: 2000
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57R17; 57S05; 53D35

description: This paper studies groups of symplectomorphisms of ruled surfaces for symplectic forms with varying cohomology class. This class is characterized by the ratio R of the size of the base to that of the fiber. By considering appropriate spaces of almost complex structures, we investigate how the topological type of these groups changes as R increases. If the base is a sphere, this changes precisely when R passes an integer, and for general bases it stabilizes as R goes to infinity. Our results extend and make more precise some of the conclusions of Abreu--McDuff concerning the rational homotopy type of these groups for rational ruled surfaces.
description: 24 pages, with minor corrections
Ephutomorpha , Andre 1902
Creators: name: Brothers, Denis J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Ephutomorpha

description: Ephutomorpha pallidipes (André, 1896); Papua New Guinea
 [Mutilla (Sphaerophthalma [sic]) mirabilis] var. pallidipes André, 1896: 91; ♂.
 Mutilla (Ephuta) mirabilis var. pallidipes; Mantero 1900.
 Ephutomorpha mirabilis var. pallidipes; André 1902b.
 Ephutomorpha pallidipes (André, 1896); Mickel 1935.
description: Published as part of Brothers, Denis J., 2022, Critical analysis of the type material of Mutillidae described from the Australasian Region (Hymenoptera), pp. 1-215 in Zootaxa 5140 (1) on page 202, DOI: 10.11646/zootaxa.5140.1.1, http://zenodo.org/record/6572181
Comment on "Accelerated Detectors and Temperature in (Anti) de Sitter Spaces"
Creators: name: Jacobson, Ted
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown how the results of Deser and Levin on the response of accelerated detectors in anti-de Sitter space can be understood from the same general perspective as other thermality results in spacetimes with bifurcate Killing horizons.
description: 5 pages, LaTeX
Data-Driven Wide-Area Control Design of Power System Using the Passivity Shortage Framework
Creators: name: Xu, Ying
name: Qu, Zhihua
name: Harvey, Roland
name: Namerikawa, Toru
Publisher: name: arXiv
Year: 2019
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A novel wide-area control design is presented to mitigate inter-area power frequency oscillations. A large-scale power system is decomposed into a network of passivity-short subsystems whose nonlinear interconnections have a state-dependent affine form, and by utilizing the passivity shortage framework a two-level design procedure is developed. At the lower level, any generator control can be viewed as one that makes the generator passivity-short and $L_2$ stable, and the stability impact of the lower-level control on the overall system can be characterized in terms of two parameters. While the system is nonlinear, the impact parameters can be optimized by solving a data-driven matrix inequality (DMI), and the high-level wide-area control is then designed by solving another Lyapunov matrix inequality in terms of the design parameters. The proposed methodology makes the design modular, and the resulting control is adaptive with respect to operating conditions of the power system. A test system is used to illustrate the proposed design, including DMI and the wide-area control, and simulation results demonstrate effectiveness in damping out inter-area oscillations.
description: 12 pages, 9 figures
Evidence of non collisional femtosecond laser electron heating in dielectric materials
Creators: name: Duchateau, G.
name: Chimier, B.
name: Coudert, S.
name: Smetanina, E.
name: Barilleau, L.
name: Fedorov, N.
name: Jouin, H.
name: Geoffroy, G.
name: Martin, P.
name: Tikhonchuk, V. T.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Electron dynamics in the bulk of large band gap dielectric crystals induced by intense femtosecond laser pulses at 800 nm is studied. With laser intensities under the ablation threshold (a few 10 TW/cm\textsuperscript{2}), electrons with unexpected energies in excess of 40-50 eV are observed by using the photoemission spectroscopy. A theoretical approach based on the Boltzmann kinetic equation including state-of-the-art modeling for various particles interactions is developed to interpret these experimental observations. A direct comparison shows that both electron heating in the bulk and a further laser field acceleration after ejection from the material contribute equivalently to the final electron energy gain. The electron heating in the bulk is shown to be significantly driven by a non-collisional process, i.e. direct multiphoton transitions between sub-bands of the conduction band. This work also sheds light on the contribution of the standard electron excitation/relaxation collisional processes, providing a new baseline to study the electron dynamics in dielectric materials and associated applications as laser material structuring.
description: 5 pages, 5 figures
Non-diffusive angular momentum transport in rotating $\bf z$-pinches
Creators: name: Rüdiger, G.
name: Schultz, M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The stability of conducting Taylor-Couette flows under the presence of toroidal magnetic background fields is considered. For strong enough magnetic amplitudes such magnetohydrodynamic flows are unstable against nonaxisymmetric perturbations which may also transport angular momentum. In accordance with the often used diffusion approximation one expects the angular momentum transport vanishing for rigid rotation. In the sense of a nondiffusive $Λ$ effect, however, even for {\em rigidly} rotating $z$-pinches an axisymmetric angular momentum flux appears which is directed outward (inward) for large (small) magnetic Mach numbers. The internal rotation in a magnetized rotating tank can thus never be uniform. Those particular rotation laws are used to estimate the value of the instability-induced eddy viscosity for which the nondiffusive $Λ$ effect and the diffusive shear-induced transport compensate each other. The results provide the Shakura-Sunyaev viscosity ansatz leading to numerical values linearly growing with the Reynolds number of rotation.
description: 15 pages, 9 figures
The Intersection of Teacher Education, Education Policy, and Education Research: Perceptions from Teacher Education Stakeholders
Creators: Francisco, Marian Patricia Bea Usero
Publisher: name: Columbia University
Year: 2020
Subjects: Teachers--Training of
Education and state
School management and organization
Education
Teacher effectiveness

description: This dissertation explored the intersection of teacher education, education research and education policy through interviews among stakeholders of teacher education from Oman and the Philippines (i.e., teacher educators, policymakers, student teachers, and in-service teachers) and document analysis of various education policies and documents using a grounded theory approach. The dissertation is composed of three studies: the first two are qualitative studies and the third a mixed methods study. Each study has its own abstract, introduction, review of related literature, methods, results, discussions, implications, and references section. The first study is a qualitative study that explored the perceived characteristics of an ideal teacher among various stakeholders, looking at similarities and differences of perceptions among stakeholders and across countries. The researcher used a combination of a/r/tography, metaphor and inductive coding to analyze qualitative interview data. Findings suggest that even though there were universal characteristics sought for in ideal teachers, there were still cultural variances in how various cultures perceived their “ideal teacher.” The second study is a qualitative study that explored the perceptions of education policy among stakeholders and investigated if there was a difference in how stakeholders interpreted specific education policies as compared to what was indicated in official education policies. Findings suggest that these negative perceptions were rooted from misinterpretation and mis-implementation of the said education policies. The third study is a mixed methods study that explored the association between educational research usage and other demographic factors and how research was used and perceived by stakeholders. The researcher used data collected from a demographic survey and a structured open-ended interview. Qualitative data was analyzed using analytic coding while quantitative data was analyzed using descriptive statistics and Chi-Square test. Findings suggest that majority of the stakeholders use education research, however the frequency and purpose is affected by the roles and responsibilities of the stakeholders. Statistical results showed that there were significant association between frequency of usage and age, educational attainment, years of experience, profession and country. Implications for the various stakeholders and teacher education programs based on the results of the three studies are discussed in the last chapter of this dissertation.
A journey to serve : a Chinese American woman’s service in the Canadian Armed Forces during World War II
Creators: name: Thornton, Sharyne Shiu
Publisher: name: The University of British Columbia
Year: 2013

description: In July 1943, my 19 year old mother, May Yee (aka May Toy Shiu), attempted to enter Canada through Windsor, Ontario intending to join the Canadian Army Auxiliary Corps. Denied entry because she lacked proof of her US citizenship, she returned to Chicago, Illinois where she appeared on July, 23, 1943, before the District Director of Immigration and Naturalization who determined that she was indeed, born in Chicago, Illinois on December 28, 1923 to Chinese immigrant parents. Initially, she sought to join the US Armed Forces but was denied because of her age. However, a Canadian recruiter informed her that women could serve in the Canadian Armed Forces at 18 years of age and recruited her to serve. Thus, began a journey that would cross geographic borders, intersect with the anti-Chinese immigration policies of both the US and Canada, and where she would participate in the little told story of minority women’s service in WW II on behalf of both Canada and the United States. This paper presents her narrative of service. Embedded in this narrative is her triumph over gender bias, reflected in her personal story of birth as an ill-fated Chinese daughter and the tenacious strength of a young Chinese American woman who sought first to serve her country of birth, the United States, and subsequently, Canada during WWII. Through the narrative construction of her story, this paper examines the broader themes of Chinese women in the Americas: gender identity and power; changing patterns of kinship influenced by immigration and the policies that shaped acculturation to different social norms, and the liminality of a gendered, ethnic minority self that was challenged to balance multiple social worlds.
Symplectic Structures on Fiber Bundles
Creators: name: Lalonde, Francois
name: McDuff, Dusa
Publisher: name: arXiv
Year: 2000
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D35; 57R17; 55R20; 57S05

description: Let $π: P\to B$ be a locally trivial fiber bundle over a connected CW complex $B$ with fiber equal to the closed symplectic manifold $(M,\om)$. Then $π$ is said to be a symplectic fiber bundle if its structural group is the group of symplectomorphisms $\Symp(M,\om)$, and is called Hamiltonian if this group may be reduced to the group $\Ham(M,\om)$ of Hamiltonian symplectomorphisms. In this paper, building on prior work by Seidel and Lalonde, McDuff and Polterovich, we show that these bundles have interesting cohomological properties. In particular, for many bases $B$ (for example when $B$ is a sphere, a coadjoint orbit or a product of complex projective spaces) the rational cohomology of $P$ is the tensor product of the cohomology of $B$ with that of $M$. As a consequence the natural action of the rational homology $H_k(\Ham(M))$ on $H_*(M)$ is trivial for all $M$ and all $k > 0$. Added: The erratum makes a small change to Theorem 1.1 concerning the characterization of Hamiltonian bundles.
description: 40 pages, Latex. Erratum added. Comments on previous version: shortened, section on 4-dimensional bases omitted, minor corrections and extra discussion of the homotopy aspects of the problem
Changes: The Past, Present, and Future of the Nearby Dwarf Galaxy NGC 55
Creators: name: Davidge, T. J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Spectra that cover wavelengths from 0.6 to 1.1um are used to examine the behavior of emission and absorption features in a contiguous 22 x 300 arcsec region centered on the nearby dwarf galaxy NGC 55. Based on the relative strengths of various emission features measured over spatial scales of many tens of parsecs, it is concluded that the ionization states and sulphur abundances in most of the star-forming regions near the center of NGC 55 are similar. A large star-forming region is identified in the north west part of the disk at a projected distance of ~1 kpc from the galaxy center that has distinct ionization properties. Fossil star-forming regions are also identified using the depth of the near-infrared Ca triplet. One such area is identified near the intersection of the major and minor axes, and it is suggested that this area is a proto-nucleus. The spectra of bright unresolved sources that are blended stellar asterisms, compact HII regions, and star clusters are also discussed. The spectra of some of the HII regions contain Ca triplet absorption lines, signalling a concentration of stars in the resolution element that span many Myr. Six of the unresolved sources have spectroscopic characteristics that are indicative of C stars embedded in intermediate age clusters. The peculiar properties of NGC 55 have been well documented in the literature, and it is argued that these may indicate that NGC 55 is transforming into a dwarf lenticular galaxy.
description: To appear in The Astronomical Journal
The Hamming Distance in the Minority Game
Creators: name: D'hulst, R.
name: Rodgers, G. J.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We investigate different versions of the minority game, a toy model for agents buying and selling a commodity. The Hamming distance between the strategies used by agents to take decisions is introduced as an analytical tool to determine several properties of these models. The success rate of the agents in an adaptive version of the game is compared with the rate from a stochastic version. It is shown numerically and analytically that the adaptive process is inefficient, increasing the success rate of the unused strategies while decreasing the success rate of the strategies used by the agents. The agents do not do as well as if they were forced to use only one strategy permanently. A version of the game in which the agents strategies evolve is also analyzed using the notion of distance. The agents evolve into a state in which they are all using one strategy, which is again the state that yields the maximum success rate.
description: 21 pages (Latex file), including 3 figures (eps), final version
Ephutomorpha pallidiventris
Creators: name: Brothers, Denis J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Ephutomorpha
Ephutomorpha pallidiventris

description: Ephutomorpha pallidiventris (André, 1902); Australia
 Mutilla pallidiventris André, 1902: 484; ♂.
 Ephutomorpha pallidiventris (André, 1902); André 1902b.
description: Published as part of Brothers, Denis J., 2022, Critical analysis of the type material of Mutillidae described from the Australasian Region (Hymenoptera), pp. 1-215 in Zootaxa 5140 (1) on page 202, DOI: 10.11646/zootaxa.5140.1.1, http://zenodo.org/record/6572181
Quantitative Impact Evaluation of an Abstraction Layer for Data Stream Processing Systems
Creators: name: Hesse, Guenter
name: Matthies, Christoph
name: Glass, Kelvin
name: Huegle, Johannes
name: Uflacker, Matthias
Publisher: name: arXiv
Year: 2019
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: With the demand to process ever-growing data volumes, a variety of new data stream processing frameworks have been developed. Moving an implementation from one such system to another, e.g., for performance reasons, requires adapting existing applications to new interfaces. Apache Beam addresses these high substitution costs by providing an abstraction layer that enables executing programs on any of the supported streaming frameworks. In this paper, we present a novel benchmark architecture for comparing the performance impact of using Apache Beam on three streaming frameworks: Apache Spark Streaming, Apache Flink, and Apache Apex. We find significant performance penalties when using Apache Beam for application development in the surveyed systems. Overall, usage of Apache Beam for the examined streaming applications caused a high variance of query execution times with a slowdown of up to a factor of 58 compared to queries developed without the abstraction layer. All developed benchmark artifacts are publicly available to ensure reproducible results.
Ephutomorpha paradisiaca Zavattari 1914
Creators: name: Brothers, Denis J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Ephutomorpha
Ephutomorpha paradisiaca

description: Ephutomorpha paradisiaca Zavattari, 1914; Indonesia (New Guinea)
 Ephutomorpha paradisiaca Zavattari, 1914: 106; ♀, ♂.
 “ Ephutomorpha ” paradisiaca; Brothers 1975.
description: Published as part of Brothers, Denis J., 2022, Critical analysis of the type material of Mutillidae described from the Australasian Region (Hymenoptera), pp. 1-215 in Zootaxa 5140 (1) on page 202, DOI: 10.11646/zootaxa.5140.1.1, http://zenodo.org/record/6572181
Avalanche Merging and Continuous Flow in a Sandpile Model
Creators: name: Corral, Alvaro
name: Paczuski, Maya
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A dynamical transition separating intermittent and continuous flow is observed in a sandpile model, with scaling functions relating the transport behaviors between both regimes. The width of the active zone diverges with system size in the avalanche regime but becomes very narrow for continuous flow. The change of the mean slope, Delta z, on increasing the driving rate, r, obeys Delta z ~ r^{1/theta}. It has nontrivial scaling behavior in the continuous flow phase with an exponent theta given, paradoxically, only in terms of exponents characterizing the avalanches theta = (1+z-D)/(3-D).
description: Explanations added; relation to other models
The Intersection of Language and School Finance Policy: a Quantitative Study of New York City Department of Education School Principals’ Perspectives of Educational Opportunities for Emergent Bilingual Students
Creators: García, Brenda Amparo
Publisher: name: Columbia University
Year: 2021
Subjects: Education and state
School management and organization
Educational leadership
Multicultural education
Education, Bilingual

description: My dissertation is a quantitative study that focuses on the perspectives of 74 New York City Department of Education (NYC DOE) school principals regarding educational opportunities for emergent bilingual (EB) students. While this population continues to increase, EB students consistently demonstrate lower academic achievement than their monolingual peers throughout the United States (Heineke, 2015; NAEP, 2017a; NAEP, 2017b). I purposefully selected the NYC DOE for my study for three reasons: 1) New York State’s language policy embraces bilingual education; 2) the NYC DOE has implemented a differentiated weighted funding formula for EB students; and 3) the EB student composition mirrors that of other United States’ cities. My study utilized New York State’s Blueprint for English Language Learner/Multilingual Learner (ELL/MLL) Success to design a survey to collect data from my target population of 1,136 NYC DOE school principals since it aligned with the literature on providing an effective education for EB students. I found: 1) NYC DOE school principals highly agree that the elements put forth in NYSED’s Blueprint for ELL/MLL Success are present in their schools; 2) funding and professional development are challenges, as well as recommended structures and supports; differences in schools principals’ responses by: 3) program type in which they serve EB students; 4) percentage of EB students; and 5) number of EB students. The Likert-scale responses demonstrated a high level of agreement with the statements associated with effective education for EB students, while the data collected from the open-ended responses provided more insight into the challenges that respondents experience. Notwithstanding, I concluded that these school principals' perspectives varied based on school factors. My findings have implications for policy and practice for school districts serving EB students throughout the nation and may serve as a pathway to improving educational opportunities for EB students. I recommend regular cost studies for funding for EB students; monitoring of those funds; a systemic approach to professional development specific to EB students; and a system for data collection from school principals to inform professional development and systems of support and ensure they are meeting their identified needs.
Ephutomorpha parca Turner 1940
Creators: name: Brothers, Denis J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Ephutomorpha
Ephutomorpha parca

description: Ephutomorpha parca Turner, 1940; Australia
 Ephutomorpha parca Turner, 1940: 98; ♀.
description: Published as part of Brothers, Denis J., 2022, Critical analysis of the type material of Mutillidae described from the Australasian Region (Hymenoptera), pp. 1-215 in Zootaxa 5140 (1) on page 202, DOI: 10.11646/zootaxa.5140.1.1, http://zenodo.org/record/6572181
Acoustic backscatter and mesopelagic fish abundance, biomass and swimbladder morphology supplement from Swimbladder morphology masks Southern Ocean mesopelagic fish biomass
Creators: name: Dornan, Tracey
name: Fielding, Sophie
name: Saunders, Ryan A.
name: Genner, Martin J.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences

description: Supplemental material contains figures and tables of linear regression results for day and night acoustic backscatter change with latitude; swimbladder condition of key Scotia Sea mesopelagic fish species; biomass of RMT25 net samples for 1) all fauna and 2) fish; and logistic regression model of Electrona antarctica swimbladder condition.
Enhanced winnings in a mixed-ability population playing a minority game
Creators: name: Johnson, N. F.
name: Hui, P. M.
name: Zheng, D.
name: Hart, M.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Condensed Matter (cond-mat)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We study a mixed population of adaptive agents with small and large memories, competing in a minority game. If the agents are sufficiently adaptive, we find that the average winnings per agent can exceed that obtainable in the corresponding pure populations. In contrast to the pure population, the average success rate of the large-memory agents can be greater than 50 percent. The present results are not reproduced if the agents are fed a random history, thereby demonstrating the importance of memory in this system.
description: 9 pages Latex + 2 figures
title: Partiell brandbeanspruchte Stahlbetondecken: Berechnung des inneren Zwanges mit einem Scheibenmodell
Creators: name: Walter, Robert
Publisher: name: Institut für Baustoffe, Massivbau und Brandschutz (IBMB)
Year: 1981
Subjects: subject: Forschungsbericht
subject: IBMB
subject: Brandbeanspruchung
subject: Stahlbetondecke
subject: Scheibenmodell
subject: Dissertation
subject: 62

description: Institut für Baustoffe, Massivbau und Brandschutz, IBMB, der Technischen Universität Braunschweig - Materialprüfanstalt für das Bauwesen - MPA Braunschweig, vol. 47
Magnetic effects in general relativity: quadrupoles, shear and memory
Creators: name: Helfer, Adam D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational effect of "magnetic type" -- those having a curl-like character over large spheres -- are investigated, for isolated systems. The Bondi-Sachs-Newman-Penrose formalism clarifies a number of points, especially related to radiation memory. It is shown that the "memory tensor" is equivalent to the change in Bondi shear, from before to after the emission of radiation. This means that if magnetic radiation memory is present, at least one of the intervals bracketing the radiation must have non-zero magnetic shear but vanishing radiation. Such intervals, called here CPMS regimes, are shown to be necessarily non-stationary, however, raising a variety of technical and interpretative issues. In linearized general relativity, the gravitational fields due to point magnetic quadrupoles with arbitrary time-dependence are computed, and some of their physics studied. In the far zone, there is a red-shift effect which could be searched for astrophysically: light coming from behind a source generating magnetic shear would be red-shifted by an amount varying with the angle around the source of shear, and in the far-field limit this red-shift goes inversely with the impact parameter. Induction-zone effects are also considered. An induction-zone memory effect should exist which could possibly be within the reach of laboratory experiments, but no good candidates for astrophysically detectable effects are found. Also a quadrupole will induce test particles to move in such a fashion as to create an opposing quadrupole, an effect reminiscent of Lenz's law.
description: 18 pages, accepted for publication in PRD
The Intracellular Kinetics of HIV-1 Replication
Creators: Holmes, Mowgli
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: The rate of HIV-1 replication has an impact on the viral loads patients have and the time it takes for an infection to progress to AIDS. This replication rate is defined partly by the time it takes an infected cell to begin producing new infectious virus, and this, in turn, is defined by the time required for each step of the viral life cycle inside cells. Many of the stages of the HIV-1 life cycle have been well-characterized mechanistically, but the timing with which they occur has not. HIV-1 is under strong pressure to replicate rapidly, yet evidence indicates that there are stages at which there is active viral auto-inhibition of the rate of replication. We therefore sought to characterize the timing of each major stage of the viral life cycle and to determine how they are correlated with one another. Using a variety of techniques including quantitative microscopy we tracked the timing of these events, both in bulk infected cultures and in single infected cells, and generated a time line of the HIV-1 replication cycle. We find that there is a delay of about 11 hours between integration and gene expression, whereas early and late gene expression are separated by only about 3 hours. In addition we find that a critical event prior to assembly, the virus-directed removal of the host restriction factor APOBEC3G, takes place within 2.5 hours following late gene expression. One of the major processes HIV-1 must complete before it can produce new virions is the clearance of antiviral restriction factors that can block the production of new infectious virus. We present evidence in support of the hypothesis that the assembly and release of virions, which is inhibited by the presence of the MA domain of the Gag protein, is delayed precisely in order to allow restriction factor clearance to reach completion before the assembly process begins.
The Anomalous Chromomagnetic Dipole Moment of the Top Quark in Different Frameworks
Creators: name: Martinez, R.
name: Rodriguez, J-Alexis
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give explicit formulae for the anomalous chromomagnetic dipole moment of the top quark in the framework of the standard model, the two higgs doublet model and the minimal supersymmetric standard model. Finally, we compare the results for this coupling with the bound -0.03 <= Delta kappa <= 0.01 coming from analysis of b --> s gamma process whith an on-shell gluon.
description: Presented at the XXII Physics in Collisions Conference (PIC02), Stanford, Ca, USA, June 2002, 3 pages, LaTeX, 2 eps figures
Is there a non-stationary γ-ray emission zone 42 pc away from the 3C 279 core?
Creators: name: Patiño-Álvarez, Víctor M.
name: Dzib, Sergio A.
name: Lobanov, Andrei
name: Chavushyan, Vahram
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the relationship between the variable gamma-ray emission and jet properties in the blazar 3C 279, by combining the Fermi/LAT data spanning a period of eight years with concurrent radio measurements made at multiple epochs with VLBA at 15 and 43 GHz within the MOJAVE and VLBA-BU monitoring programs. The aim of this paper is to compare the flux variability of the different components found in the VLBA observations, to the variability in the gamma-rays. This analysis helps to investigate whether any of the jet components can be associated with the gamma-ray variability. Through Spearman rank correlation we found that the gamma-ray variability is correlated with a particular region (feature B, in the MOJAVE images) downstream from the observed base (core) of the jet. This jet component is, therefore, a likely location at which an important fraction of the variable gamma-ray emission is produced. We also calculated the average proper motion of the component with respect to the VLBA core and found that it moves at an apparent superluminal velocity of $(3.70 \pm 0.35)c$, implying that one of the gamma-ray emission zones is not stationary. This jet component is also found between 6.86 mas and 8.68 mas, which translates to a distance from the radio core of at least 42 pc.
description: Accepted for publication in A&A, 7 pages, 5 figures, 1 table
Turbulence statistics in a negatively buoyant multiphase plume
Creators: name: Bordoloi, Ankur D.
name: Lai, Chris C. K.
name: Clark, Laura K.
name: Veliz, Gerardo
name: Variano, Evan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the turbulence statistics in a {multiphase plume made of heavy particles (particle Reynolds number at terminal velocity is 450)}. Using refractive-index-matched stereoscopic particle image velocimetry, we measure the locations of particles {whose buoyancy drives the formation of a multiphase plume,} {together with the local velocity of the induced flow in the ambient salt-water}. {Measurements in the plume centerplane exhibit self-similarity in mean flow characteristics consistent with classic integral plume theories.} The turbulence characteristics resemble those measured in a bubble plume, {including strong anisotropy in the normal Reynolds stresses. However, we observe structural differences between the two multiphase plumes. First, the skewness of the probability density function (PDF) of the axial velocity fluctuations is not that which would be predicted by simply reversing the direction of a bubble plume. Second, in contrast to a bubble plume, the particle plume has a non-negligible fluid-shear production term in the turbulent kinetic energy (TKE) budget. Third, the radial decay of all measured terms in the TKE budget is slower than those in a bubble plume.} Despite these dissimilarities, a bigger picture emerges that applies to both flows. The TKE production by particles (or bubbles) roughly balances the viscous dissipation, except near the plume centerline. The one-dimensional power-spectra of the velocity fluctuations show a -3 power-law that puts both the particle and bubble plume in a category different from single-phase shear-flow turbulence.
Suppelentary material part I from Leishmaniasis in Eurasia and Africa: geographical distribution of vector species and pathogens
Creators: name: Cunze, Sarah
name: Kochmann, Judith
name: Koch, Lisa K.
name: Hasselmann, Korbinian J. Q.
name: Klimpel, Sven
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Health Care
subject: Diseases
subject: 111706 Epidemiology
subject: FOS: Health sciences

description: Figure S1, Tables S1 and S2