cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weaving worlds, colliding traditions : collaborating with Musqueam weaver and educator Debra Sparrow
Creators: name: Baird, Jill Rachel
Publisher: name: University of British Columbia
Year: 2009

description: This thesis provides a description and analysis of the process of developing a museum education programme at the UBC Museum of Anthropology (MOA). The programme Debra Sparrow: Weaving Two Worlds Together was developed collaboratively with Musqueam weaver, artist, and educator Debra Sparrow and myself, Jill Baird. At the time, I was temporary Education Coordinator at MOA between December 1993 and June 1995. The case study of this collaboration process is presented from the perspective of myself and Debra Sparrow and examines the working relationships and different individual cultural assumptions which we experienced in our collaboration. It also explores the evolving relationships between collaborators, and the institutions and communities each represents. The thesis contributes to the gap in the literature on museum and education collaborations by documenting the process, integrating theory and praxis, and stimulating the discussion within the discourses of museology and education on collaboration and change. More importantly, it illustrates that First Nations and non-First Nations museum workers can work together in a way which respects each other's world views.
Calculation of Feynman loop integration and phase-space integration via auxiliary mass flow
Creators: name: Liu, Xiao
name: Ma, Yan-Qing
name: Tao, Wei
name: Zhang, Peng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend the auxiliary-mass-flow (AMF) method originally developed for Feynman loop integration to calculate integrals involving also phase-space integration. Flow of the auxiliary mass from the boundary ($\infty$) to the physical point ($0^+$) is obtained by numerically solving differential equations with respective to the auxiliary mass. For problems with two or more kinematical invariants, the AMF method can be combined with traditional differential equation method by providing systematical boundary conditions and highly nontrivial self-consistent check. The method is described in detail with a pedagogical example of $e^+e^-\rightarrow γ^* \rightarrow t\bar{t}+X$ at NNLO. We show that the AMF method can systematically and efficiently calculate integrals to high precision.
description: 14 pages, 4 figures
Identification of BAR-1/?-catenin responsive genes in C.elegans a microarray analysis reveals a role for Wnt pathway regulation in nematode cuticle development
Creators: name: Jackson, Belinda Marie Brown
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: C. elegans
Collagens
Cuticle formation
Microarray
qRT-PCR
Wnt Pathway

description: The Wnt signaling pathway is highly conserved, playing an integral part in development and homeostasis of metazoan organisms. This pathway regulates cell polarity, migration and fate determination and its mis–activation has been implicated in assorted birth defects and diseases, including many cancers. In C. lic>elegans  signaling is required for embryonic and larval development. Homologs have been identified for most of the core pathway components, but only a handful of target genes have been found.  The Eisenmann lab is interested in Wnt pathway regulation of cell fate determination, and has shown that Wnt/?–catenin signaling is involved in fate specification of certain epithelial cells. My research interest is to identify C. lic>elegans pathway target genes. Using microarray analysis I identified 178 genes that are differentially expressed upon over expression of del’NTBAR–1/?–catenin, a stable variant of the Wnt pathway transcriptional activator.  Stringent qRT–PCR analysis of these candidate genes showed that 39 are bona fide ??NTBAR–1 responsive. For thirteen of these genes expression is also dependent on the pathway co–activator POP–1/TCF, and therefore they are considered to be strong putative Wnt pathway targets.  Additionally, five of the candidate genes show DAF–16 dependence, one encodes a negative regulator of the Wnt pathway, and four encode cuticular collagens which are major components of the C. lic>elegans keleton. In characterizing the putative Wnt pathway target genes a subset were found to be co–expressed both temporally and spatially. Of particular interest were a set of seven expressed during the L4 larval stage of development in the hypodermal cells of the head, tail and mid–body.  Included among this set were the collagen encoding genes.  Phenotypes resulting from RNAi mediated reduction of gene function support the hypothesis that several of these genes may be involved in C. lic>elegans cle formation. Finally, in this study I have identified a novel set of BAR–1 responsive genes, among which are a set of strong Wnt pathway targets.  Further I believe I have uncovered a role for Wnt signaling in the formation of the C. lic>elegans cle, a novel finding in the worm.
Experimental evaluation and implementation of Spread Identity Framework.
Creators: name: Joshi, Nikhil D.
Publisher: name: Maryland Shared Open Access Repository
Year: 2011
Subjects: DDoS
Denial of Service
filters
gateway
security
Spread identity

description: We provide a novel implementation of the Spread Identity (SI) framework and experimentally evaluate it on an organizational level. Unlike previous implementations of SI, ours builds on RFC2663 and RFC2694, which describes approaches for application-level gateways for domain name systems and twice network address translation, respectively. We implement a minimal system suitable for a medium-sized organization and measure connection establishment time, network address translation (NAT) table size, name resolution time, packet forwarding rate, and memory requirements. We find that our implementation consumes similar resources to those of a typical single NAT system. Dhananjay Phatak, et al. first proposed SI in 2005. The central idea is to spread identity of a host across multiple network addresses through dynamic mapping of IP addresses to host names, thereby obfuscating the host's true network identity to some degree. One application is to mitigate IP packet floods. Using the ns-2 network simulator, in 2010 Sonawane experimentally demonstrated the effectiveness of SI as a defense against packet flood attacks. By contrast, our work evaluates the performance of our new implementation of SI on a real network. Using the Deterlab test network, we experimentally compare our SI implementation with a single NAT subsystem, with both systems using NetFilter for NATting. We generate 100,000 simultaneous connections to test the baseline NAT and SI systems (a typical load for medium-sized organizations). Except for name resolution, both systems perform similarly on all measured parameters. In particular, we find there is no difference between end-to-end connection establishment time, up to 90 us difference in gateway packet translation time. We also find that NAT table size cannot be considered in isolation: NAT table entries are a part of connection tracking entries which require 304 byte entries per connection for both our implemented baseline and SI systems. In SI, name resolution takes up to 1500ms in the worst case, compared to 50ms in the baseline system. From these results, we conclude that our system is technically feasible and results in similar load patterns on the gateway to those from a typical single NAT system.
Towards a 1% measurement of the Lense-Thirring effect with LARES?
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Geophysics (physics.geo-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: After the recent approval by the Italian Space Agency (ASI) of the LARES mission, which will be launched at the end of 2008 by a VEGA rocket to measure the general relativistic gravitomagnetic Lense-Thirring effect by combining LARES data with those of the existing LAGEOS and LAGEOS II satellites, it is of the utmost importance to assess if the claimed accuracy \lesssim 1% will be realistically obtainable. A major source of systematic error is the mismodelling δJ_L in the static part of the even zonal harmonic coefficients J_L, L=2,4,6,.. of the multipolar expansion of the classical part of the terrestrial gravitational potential; such a bias crucially depends on the orbital configuration of LARES. If for δJ_L the difference between the best estimates of different Earth's gravity solutions from the dedicated GRACE mission is conservatively taken instead of optimistically considering the statistical covariance sigmas of each model separately, as done so far in literature, it turns out that, since LARES will be likely launched in a low-orbit (semimajor axis a\lesssim 7600 km), the bias due to the geopotential may be up to ten times larger than what claimed, according to a calculation up to degree L=20. Taking into account also the even zonal harmonics with L>20, as required by the relatively low altitude of LARES, may further degrade the total accuracy. Should a nearly polar configuration (inclination to the Earth's equator i\approx 90 deg) be finally implemented, also other perturbations would come into play, further corrupting the measurement of the Lense-Thirring effect. The orbital configuration of LARES may also have some consequences in terms of non-gravitational perturbations and measurement errors.
description: Latex, 21 pages, 8 figures, 4 tables, 26 references. To appear in Advances in Space Research (ASR)
Non-diffusive spin dynamics in a two-dimensional electron gas
Creators: name: Weber, C. P.
name: Orenstein, J.
name: Bernevig, B. Andrei
name: Zhang, Shou-Cheng
name: Stephens, Jason
name: Awschalom, D. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs/GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are used to probe the relaxation rates of spin polarization waves in the wavevector range from zero to $6\times 10^4$ cm$^{-1}$. We find that the spin polarization lifetime is maximal at nonzero wavevector, in contrast with expectation based on ordinary spin diffusion, but in quantitative agreement with recent theories that treat diffusion in the presence of spin-orbit coupling.
description: 5 pages, 3 figures
Searching for proto-planets with MUSE
Creators: name: Xie, C.
name: Haffert, S. Y.
name: de Boer, J.
name: Kenworthy, M. A.
name: Brinchmann, J.
name: Girard, J.
name: Snellen, I. A. G.
name: Keller, C. U.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Protoplanetary disks contain structures such as gaps, rings, and spirals, which are thought to be produced by the interaction between the disk and embedded protoplanets. However, only a few planet candidates are found orbiting within protoplanetary disks, and most of them are being challenged as having been confused with disk features. We aim to discover more proto-planetary candidates with MUSE, with a secondary aim of improving the high-resolution spectral differential imaging (HRSDI) technique by analyzing the instrumental residuals of MUSE. We analyzed MUSE observations of five young stars and applied the HRSDI technique to perform high-contrast imaging. With a 30 min integration time, MUSE can reach 5$σ$ detection limits in apparent H$α$ line flux down to 10$^{-14}$ and 10$^{-15}$ erg s$^{-1}$ cm$^{-2}$ at 0.075" and 0.25", respectively. In addition to PDS 70 b and c, we did not detect any clear accretion signatures in PDS 70, J1850-3147, and V1094 Sco down to 0.1". MUSE avoids the small sample statistics problem by measuring the noise characteristics in the spatial direction at multiple wavelengths. We detected two asymmetric atomic jets in HD 163296. The HRSDI technique when applied to MUSE data allows us to reach the photon noise limit at small separations (i.e., < 0.5"). With a higher spectral resolution, MUSE can achieve fainter detection limits in apparent line flux than SPHERE/ZIMPOL by a factor of $\sim$5. MUSE has some instrumental issues that limit the contrast that appear in cases with strong point sources, which can be either a spatial point source due to high Strehl observations or a spectral point source due to a high line-to-continuum ratio. We modified the HRSDI technique to better handle the instrumental artifacts and improve the detection limits.
description: 14 pages, 15 figures, 4 tables. Accepted for publication in A&A
You Strike a Woman; You Strike a Rock: Dignity, Law, and Monuments in South Africa
Creators: name: Omonijo, Oluwaseyi
Publisher: name: University of Chicago
Year: 2018
Subjects: subject: Africa
subject: Dignity
subject: Political Theory

description: ‘Wathint' Abafazi, Wathint' Imbokodo' [You strike a woman; you strike a rock] as a rallying cry has two significant meanings for this thesis. First, to "strike a woman" highlights the ways in which politically active black south African women suffered from unspeakable violence under apartheid. Secondly, "to strike a woman, is to strike a rock", in a symbolic sense, highlights the current destruction of women's monuments, usually made of cement, marble or bronze. Although women have suffered from both physical and symbolic assaults on their dignity under apartheid such as in the case of Nokuthula Simelane, women in the post-apartheid era are now using both legal and symbolic means to reclaim their dignity. I argue that what is at stake is not only how women lay claim to dignity, but the source of the tension between dignity as a right and a value.
Grammatical tone, question and answer
Creators: name: Koutouan, Evelyne
name: Russell, Katherine
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of contexts involving particle verbs, multi-verb constructions, as well as combinations of subject and verb in different aspects (perfective vs. imperfective) and imperative mood. Elicitation of family terms and adjectives relating to people.
Fluctuation theorem applied to the Nosé-Hoover thermostated Lorentz gas
Creators: name: Gilbert, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present numerical evidence supporting the validity of the Gallavotti-Cohen Fluctuation Theorem applied to the driven Lorentz gas with Nosé-Hoover thermostating. It is moreover argued that the asymptotic form of the fluctuation formula is independent of the amplitude of the driving force, in the limit where it is small.
description: 4 pages, 3 figures
Phase structure of intrinsic curvature models on dynamically triangulated disk with fixed boundary length
Creators: name: Koibuchi, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A first-order phase transition is found in two types of intrinsic curvature models defined on dynamically triangulated surfaces of disk topology. The intrinsic curvature energy is included in the Hamiltonian. The smooth phase is separated from a non-smooth phase by the transition. The crumpled phase, which is different from the non-smooth phase, also appears at sufficiently small curvature coefficient $α$. The phase structure of the model on the disk is identical to that of the spherical surface model, which was investigated by us and reported previously. Thus, we found that the phase structure of the fluid surface model with intrinsic curvature is independent of whether the surface is closed or open.
description: 9 pages with 10 figures
WHAT ARE THE BEST AND MOST EFFECTIVE METHODS USED IN NOTE-TAKING PROCESS DURING LECTURES?
Creators: name: Ashurova, Khurshida
Publisher: name: Zenodo
Year: 2024

description: This thesis aims to define several techniques which can be relevant for students while making notes during lectures. It is essential to think deeply about providing various methods and techniques for students as the vast majority of them struggle with choosing an appropriate format or do not even aware of applying them properly. Several workable methods which are suggested by different authors will be discussed below
Constraints on resonant-trapping for two planets embedded in a protoplanetary disc
Creators: name: Pierens, Arnaud
name: Nelson, Richard P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the evolution of two-planet systems embedded in a protoplanetary disc, which are composed of a Jupiter-mass planet plus another body located further out in the disc. We consider outermost planets with masses ranging from 10 earth masses to 1 M_J. We also examine the case of outermost bodies with masses < 10 earth masses (M_E). Differential migration of the planets due to disc torques leads to different evolution outcomes depending on the mass of the outer protoplanet. For planets with mass < 3.5 M_E the type II migration rate of the giant exceeds the type I migration rate of the outer body, resulting in divergent migration. Outer bodies with masses in the range 3.5 < m_o < 20 M_E become trapped at the edge of the gap formed by the giant planet, because of corotation torques. Higher mass planets are captured into resonance with the inner planet. If 30 < m_o < 40 M_E or m_o=1 M_J, then the 2:1 resonance is established. If 80 < m_o < 100 M_E, the 3:2 resonance is favoured. Simulations of gas-accreting protoplanets of mass m_o > 20 M_E, trapped initially at the edge of the gap, or in the 2:1 resonance, also result in eventual capture in the 3:2 resonance as the planet mass grows to become close to the mass of Saturn. Our results suggest that there is a theoretical lower limit to the mass of an outer planet that can be captured into resonance with an inner Jovian planet, which is relevant to observations of extrasolar multiplanet systems. Furthermore, capture of a Saturn-like planet into the 3:2 resonance with a Jupiter-like planet is a very robust outcome of simulations. This result is relevant to recent scenarios of early Solar System evolution which require Saturn to have existed interior to the 2:1 resonance with Jupiter prior to the onset of the Late Heavy Bombardment.
description: 10 pages, 9 figures, Accepted for publication in A&A
Coupled Maxwell and Time-Dependent Orbital Free Density Functional Calculations
Creators: name: Covington, Cody
name: Malave, Justin
name: Varga, Kalman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Coupled Maxwell and time-dependent orbital-free calculations are implemented and tested to describe the interaction of electromagnetic waves and matter. The currents and induced fields predicted by the orbital-free calculations are compared to time-dependent density functional calculations and very good agreement is found for various systems including jellium sheets, jellium spheres, atomistic sheets, and icosahedron clusters.
GQ Lup B Visible & Near-Infrared Photometric Analysis
Creators: name: Marois, C.
name: Macintosh, B.
name: Barman, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have re-analyzed archival HST and Subaru data of the recently discovered planetary mass companion (PMC) GQ Lup B. With these we produce the first R and I band photometry of the companion and fit a radius and effective temperature using detailed model atmospheres. We find an effective temperature of 2335 +/- 100K, and a radius of 0.38 +/- 0.05 Rsol and luminosity of log(L/Lsol) = -2.42 +/- 0.07 (at 140pc). Since we fit wavelengths that span most of the emitted radiation from GQ Lup this luminosity estimate is robust, with uncertainty dominated by the distance uncertainty (+/- 50 pc). The radius obtained for 140pc (0.38Rsol) is significantly larger than the one originally derived and larger than model predictions. The mass of the object is much more model-dependent than the radiative properties, but for the GAIA dusty models we find a mass between 10-20 MJup, in the range of the brown dwarf and PMC deuterium burning boundary. Assuming a distance of 140pc, observations fit to 1sigma the Baraffe evolution model for a ~15 MJup brown dwarf. Additionally, the F606W photometric band is significantly overluminous compared to model predictions and other brown dwarfs. Such overluminosity could be explained by a bright Halpha emission from chromospheric activity, interaction with another undetected companion, or accretion. Assuming that GQ Lup B has a bright Halpha emission line, its Halpha emission strength is 10^(-1.71 +/- 0.10) Lbol, significantly larger than field late-type dwarfs. GQ Lup B might be strongly accreting and still be in its formation phase.
description: 14 pages, 3 figures, ApJL final accepted version
Letter from Colin C. MacRae to the Rainbow Ranche, September 16, 1909
Creators: name: MacRae, Colin C.
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to the Rainbow Ranche from Colin C. MacRae, manager of the Royal Bank of Canada in Vernon, B.C., dated September 16, 1909, regarding request for the signature of R.S. Dormer on the demand note.
On the role of NLL corrections and Energy Conservation in the High Energy Evolution of QCD
Creators: name: Andersen, Jeppe R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new method for solving the BFKL evolution applicable at both leading and next-to-leading logarithmic accuracy, and tailored to the study of QCD multi-jet events at colliders. We utilise this to discuss corrections to the standard analysis. There are known, large corrections from energy and momentum conservation. We show that, despite claims to the contrary in the literature, these are unrelated to the next-to-leading logarithmic corrections to the evolution kernel.
description: 8 pages, references added
Destruction of Neel order and local spin spirals in insulating La_{2-x}Sr_xCuO_4
Creators: name: Luscher, Andreas
name: Milstein, Alexander I.
name: Sushkov, Oleg P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Starting from the t-J model, we derive an effective field theory describing the spin dynamics in the insulating phase of La_{2-x}Sr_xCuO_4, x < 0.055, at low temperature. Using Monte Carlo simulations, we show that the destruction of Neel order is driven by the single-hole localization length kappa. A phase transition at 2% doping is consistent with the value of kappa known from the variable range hopping conductivity. The static spin structure factor obtained in our calculations is in perfect agreement with neutron scattering data over the whole range of doping. We also demonstrate that topological defects (spin vortex-antivortex pairs) are an intrinsic property of the spin-glass ground state.
description: 4 pages, 2 figures
A type language for message passing component-based systems
Creators: name: Savanović, Zorica
name: Galletta, Letterio
name: Vieira, Hugo Torres
Publisher: name: arXiv
Year: 2020
Subjects: subject: Programming Languages (cs.PL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.1;F.3.2

description: Component-based development is challenging in a distributed setting, for starters considering programming a task may involve the assembly of loosely-coupled remote components. In order for the task to be fulfilled, the supporting interaction among components should follow a well-defined protocol. In this paper we address a model for message passing component-based systems where components are assembled together with the protocol itself. Components can therefore be independent from the protocol, and reactive to messages in a flexible way. Our contribution is at the level of the type language that allows to capture component behaviour so as to check its compatibility with a protocol. We show the correspondence of component and type behaviours, which entails a progress property for components.
description: In Proceedings ICE 2020, arXiv:2009.07628
Absence of Hole Confinement in Transition Metal Oxides with Orbital Degeneracy
Creators: name: Daghofer, M.
name: Wohlfeld, K.
name: Oles, A. M.
name: Arrigoni, E.
name: Horsch, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the spectral properties of a hole moving in a two-dimensional Hubbard model for strongly correlated t_2g electrons. Although superexchange interactions are Ising-like, a quasi-one-dimensional coherent hole motion arises due to effective three-site terms. This mechanism is fundamentally different from the hole motion via quantum fluctuations in the conventional spin model with SU(2) symmetry. The orbital model describes also propagation of a hole in some e_g compounds, and we argue that orbital degeneracy alone does not lead to hole self-localization.
description: 4 pages, 5 figures
ROLE OF MUSIC PEDAGOGY IN HIGHER EDUCATION
Creators: name: Jalilova, Ug'iloy
Publisher: name: Zenodo
Year: 2024

description: This thesis analyzes the role and importance of music pedagogy in the higher education system. Music pedagogy is considered not only as a means of forming musical skills, but also as a means of developing students' creative potential and expanding aesthetic thinking. Music pedagogy in higher education allows students to familiarize themselves with music theory and practice, as well as national and world musical culture. The article examines the educational, social and cultural aspects of music education in higher education institutions, and also highlights the role of innovative pedagogical approaches in this process.
Single-Particle Density of States of a Superconductor with a Spatially Varying Gap and Phase Fluctuations
Creators: name: Valdez-Balderas, Daniel
name: Stroud, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent experiments have shown that the superconducting energy gap in some cuprates is spatially inhomogeneous. Motivated by these experiments, and using exact diagonalization of a model d-wave Hamiltonian, combined with Monte Carlo simulations of a Ginzburg-Landau free energy functional, we have calculated the single-particle density of states LDOS$(ω,r)$ of a model high-T$_c$ superconductor as a function of temperature. Our calculations include both quenched disorder in the pairing potential and thermal fluctuations in both phase and amplitude of the superconducting gap. Most of our calculations assume two types of superconducting regions: $α$, with a small gap and large superfluid density, and $β$, with the opposite. If the $β$ regions are randomly embedded in an $α$ host, the LDOS on the $α$ sites still has a sharp coherence peak at $T = 0$, but the $β$ component does not, in agreement with experiment. An ordered arrangement of $β$ regions leads to oscillations in the LDOS as a function of energy. The model leads to a superconducting transition temperature $T_c$ well below the pseudogap temperature $T_{c0}$, and has a spatially varying gap at very low $T$, both consistent with experiments in underdoped Bi2212. Our calculated LDOS$(ω,r)$ shows coherence peaks for $T < T_c$, which disappear for $T > T_c$, in agreement with previous work considering phase but not amplitude fluctuations in a homogeneous superconductor. Well above $T_c$, the gap in the LDOS disappears.
description: 37 pages, 12 figures. Accepted by Phys. Rev. B. Scheduled Issue: 01 Nov 2006
Alliance free and alliance cover sets
Creators: name: Rodriguez-Velazquez, J. A.
name: Sigarreta, J. M.
name: Yero, I. G.
name: Bermudo, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C69, 05C70, 05C50

description: A \emph{defensive} (\emph{offensive}) $k$-\emph{alliance} in $Γ=(V,E)$ is a set $S\subseteq V$ such that every $v$ in $S$ (in the boundary of $S$) has at least $k$ more neighbors in $S$ than it has in $V\setminus S$. A set $X\subseteq V$ is \emph{defensive} (\emph{offensive}) $k$-\emph{alliance free,} if for all defensive (offensive) $k$-alliance $S$, $S\setminus X\neq\emptyset$, i.e., $X$ does not contain any defensive (offensive) $k$-alliance as a subset. A set $Y \subseteq V$ is a \emph{defensive} (\emph{offensive}) $k$-\emph{alliance cover}, if for all defensive (offensive) $k$-alliance $S$, $S\cap Y\neq\emptyset$, i.e., $Y$ contains at least one vertex from each defensive (offensive) $k$-alliance of $Γ$. In this paper we show several mathematical properties of defensive (offensive) $k$-alliance free sets and defensive (offensive) $k$-alliance cover sets, including tight bounds on the cardinality of defensive (offensive) $k$-alliance free (cover) sets.
Phenomenological Gravitational Phase Transition: Reconciliation between the Late and Early Universe
Creators: name: Farhang, Marzieh
name: Khosravi, Nima
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work we investigate whether a certain phenomenological extension to the general relativity (GR), in the form of a gravitational phase transition (GPT) in the Universe, can reduce the external $Planck$ tensions with the local Hubble measurements and the distribution of matter, characterized by $σ_8$, as well as its internal inconsistencies in the lensing amplitude and the low--high $\ell$ parameter estimates. We introduce new degrees of freedom into the background and the two scalar perturbation equations in the Newtonian gauge, with simultaneous transitions from an early gravitational phase equivalent to GR toward a late phase. We model the transition as a "tanh" parametrized by the transition redshift $z_{\rm t}$ and width $α$, with amplitudes $Λ(z)$ and $(μ(z),γ(z))$ for the background and perturbations respectively. We verify the consistency of the datasets used in this work in the GPT framework and confirm that the individual tensions do not require conflicting transitions. We find that the joint datasets prefer a recent transition at $z_{\rm t}\approx 0.9$ in the background and perturbed Einstein equations, driven mainly by the local Hubble measurement. This transition relaxes all the tensions considered in this work.
Characteristic Classes of Bad Orbifold Vector Bundles
Creators: name: Seaton, Christopher
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55R25; 57R20; 58A12

description: We show that every bad orbifold vector bundle can be realized as the restriction of a good orbifold vector bundle to a suborbifold of the base space. We give an explicit construction of this result in which the Chen-Ruan orbifold cohomology of the two base spaces are isomorphic (as additive groups). This construction is used to indicate an extension of the Chern-Weil construction of characteristic classes to bad orbifold vector bundles. In particular, we apply this construction to the orbifold Euler class and demonstrate that it acts as an obstruction to the existence of nonvanishing sections.
description: 12 pages; improved exposition
Identity at the Intersection of Gender and Religion among Mexican-American Women in Chicago Reading List
Creators: name: Sufian, Sandra
name: Sandahl, Carrie
name: Vazquez-Melendez, Elsa
name: Michel, Joanna
name: Case, Gretchen
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: 200208 Migrant Cultural Studies
subject: FOS: Other humanities
subject: 220405 Religion and Society
subject: FOS: Philosophy, ethics and religion
subject: 190404 Drama, Theatre and Performance Studies
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: Gender studies
subject: 130205 Humanities and Social Sciences Curriculum and Pedagogy (excl. Economics, Business and Management)
subject: FOS: Educational sciences

description: This Health Humanities Portrait--Identity at the Intersection of Gender and Religion among Mexican-American Women in Chicago-- explores how individuals are expected to navigate a variety of social roles—such as their gender, age, and vocation--in their everyday lives. This Health Humanities portrait uses a “dramaturgical analysis,” derived from performance studies, to explore how social roles influence our understandings and experiences of health, well-being, and illness.
Extragalactic jets with helical magnetic fields: relativistic MHD simulations
Creators: name: Keppens, R.
name: Meliani, Z.
name: van der Holst, B.
name: Casse, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Extragalactic jets are inferred to harbor dynamically important, organized magnetic fields which presumably aid in the collimation of the relativistic jet flows. We here explore by means of grid-adaptive, high resolution numerical simulations the morphology of AGN jets pervaded by helical field and flow topologies. We concentrate on morphological features of the bow shock and the jet beam behind the Mach disk, for various jet Lorentz factors and magnetic field helicities. We investigate the influence of helical magnetic fields on jet beam propagation in overdense external medium. We use the AMRVAC code, employing a novel hybrid block-based AMR strategy, to compute ideal plasma dynamics in special relativity. The helicity of the beam magnetic field is effectively transported down the beam, with compression zones in between diagonal internal cross-shocks showing stronger toroidal field regions. In comparison with equivalent low-relativistic jets which get surrounded by cocoons with vortical backflows filled by mainly toroidal field, the high speed jets demonstrate only localized, strong toroidal field zones within the backflow vortical structures. We find evidence for a more poloidal, straight field layer, compressed between jet beam and backflows. This layer decreases the destabilizing influence of the backflow on the jet beam. In all cases, the jet beam contains rich cross-shock patterns, across which part of the kinetic energy gets transferred. For the high speed reference jet considered here, significant jet deceleration only occurs beyond distances exceeding ${\cal O}(100 R_j)$, as the axial flow can reaccelerate downstream to the internal cross-shocks. This reacceleration is magnetically aided, due to field compression across the internal shocks which pinch the flow.
description: 16 pages, Astronomy and Astrophysics accepted for publication
An Abstract Framework for Choreographic Testing
Creators: name: Coto, Alex
name: Guanciale, Roberto
name: Tuosto, Emilio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.4; D.2.5

description: We initiate the development of a model-driven testing framework for message-passing systems. The notion of test for communicating systems cannot simply be borrowed from existing proposals. Therefore, we formalize a notion of suitable distributed tests for a given choreography and devise an algorithm that generates tests as projections of global views. Our algorithm abstracts away from the actual projection operation, for which we only set basic requirements. The algorithm can be instantiated by reusing existing projection operations (designed to generate local implementations of global models) as they satisfy our requirements. Finally, we show the correctness of the approach and validate our methodology via an illustrative example.
description: In Proceedings ICE 2020, arXiv:2009.07628
Feature Extraction using a Hierarchical Growing Neural Gas
Creators: name: Guseman III, Roger Paul
Publisher: name: Maryland Shared Open Access Repository
Year: 2011

description: Upsupervised, data driven, automatic feature extraction from image data is an interesting and difficult problem. High dimensional data, such as images, often contain less information than they do data. In order for an agent to better reason about this data, finding the interesting features of the data is helpful. A current technique, known as the Growing Neural Gas(GNG), is a neural network approach to feature extraction. There are, however, adaptations that can be made to the Growing Neural Gas in order to increase its performane. Contributions of this work include development of a new neural network algorithm extending the Growing Neural Gas framework, known as the Hierarchical Growing Neural Gas(HGNG), identifications of the parameters of this HGNG which effect feature extraction performance, and a comparison of performance between the normal GNG and the HGNG neural networks.
Feature Extraction from Images of Mass Disaster Victims
Creators: name: Chhaya, Niyati H.
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: Feature extraction
Image processing
Machine learning
Pattern recognition

description: Earthquakes, hurricanes, terrorist attacks, and other such events can cause tremendous harm to people and infrastructure, often leaving those outside the areas impacted with little or no information on the state of their friends and relatives who may have been affected. Our goal is to automatically process images of patients taken as part of  the intake process at emergency medical care centers to extract searchable, text-based descriptors of patients that can be accessed remotely (e.g., via the web) to facilitate identification of victims.  Achieving this goal requires finding the person in the image, and in particular their face, to drive the process of extracting features such as hair color and style, clothing color and style, the presence or absence of glasses, and other such features. Face detection has been extensively studied for clear, frontal face  images. Images under consideration here are characterized by their noisy, non-frontal, blurry nature. We studied the performance of standard existing face detection algorithms and observed that they are exceptionally poor for this domain of images. We developed an ensemble-based face detection method that is a combination of robust skin detection and simple pattern matching face detection techniques. Also, a template-based eye detection method is pro- posed that is used as a feedback system to improve the accuracy of the face detection technique. Finally, we explored eyeglasses detection using color histograms to illustrate feature extraction using new face detection and eye detection techniques.
Face Recognition using Gabor Jets for Images of Mass Disaster Victims
Creators: name: Dabke, Kavita Sudheer
Publisher: name: Maryland Shared Open Access Repository
Year: 2011

description: Mass disasters such as earthquakes, tsunamis, floods, landslides, blizzards and other natural calamities affect a large number of people in a short time duration. After such emergencies occur, people affected need medical aid and are admitted into hospitals. In such conditions, it becomes difficult to locate one's family members and friends. Hospitals and medical centers take triage pictures of people getting admitted for their records. The content of these images could be very disturbing for some people to see. Such pictures cannot be posted on notification walls or internet websites for people to identify their missing family members or friends. This thesis addresses this problem by developing methods for searching triage image databases using query images provided by friends or family of missing people. The dataset for this thesis consist of mug shot images of people affected by calamity. These are also called the triage images. The test dataset consist of clean or regular mug shot images of people. In order to automate the process of locating missing people, our thesis has a goal of developing a face recognition system based on Gabor Jets to match a clean image to the existing triage images. Here, a clean image means a mug shot image of a person where all features such as eyebrows, eyes, nose, lips, skin, ears, etc. are seen. The system aims at pulling up the exact match from the triage dataset into the top 'N' matches filtered out based on a similarity measure. Face recognition has been studied for clean images, where all features are visible. We have developed a system to work on the domain of triage images by experimenting with existing Gabor Jets-based similarity measures and modifying the algorithm to best fit our needs.
Large amplitude oscillation of a polar crown filament in the pre-eruption phase
Creators: name: Isobe, Hiroaki
name: Tripathi, Durgesh
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report observation of a large-amplitude filament oscillation followed by an eruption. This is used to probe the pre-eruption condition and the trigger mechanism of solar eruptions. We used the EUV images from the Extreme-Ultraviolet Imaging Telescope on board SOHO satellite and the H-alpha images from the Flare Monitoring Telescope at Hida Observatory. The observed event is a polar crown filament that erupted on 15 Oct. 2002. The filament clearly exhibited oscillatory motion in the slow-rising, pre-eruption phase. The amplitude of the oscillation was larger than 20 km/s, and the motion was predominantly horizontal. The period was about 2 hours and seemed to increase during the oscillation, indicating weakening of restoring force. These results strongly indicate that, even in the slow-rise phase before the eruption, the filament retained equilibrium and behaved as an oscillator, and the equilibrium is stable to nonlinear perturbation. Moreover, the transition from such nonlinear stability to either instabilities or a loss of equilibrium that leads to the eruption occurred in the Alfven time scale. This suggests that the onset of the eruption was triggered by a fast magnetic reconnection that stabilized the pre-eruption magnetic configuration, rather than by the slow shearing motion at the photosphere.
description: 4 pages, 3 figures, accepted for publication in A&A
Numerical integration of one-loop Feynman diagrams for N-photon amplitudes
Creators: name: Nagy, Zoltan
name: Soper, Davison E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the calculation of cross sections for infrared-safe observables in high energy collisions at next-to-leading order, one approach is to perform all of the integrations, including the virtual loop integration numerically. One would use a subtraction scheme that removes infrared and collinear divergences from the integrand in a style similar to that used for real emission graphs. Then one would perform the loop integration by Monte Carlo integration along with the integrations over final state momenta. In this paper, we have explored how one can perform the numerical integration. We have studied the N-photon scattering amplitude with a massless electron loop in order to have a case with a singular integrand that is not, however, so singular as to require the subtractions. We report results for N = 4, N = 5 with left-handed couplings, and N=6.
description: 30 pages including 5 figures. This is a revised version that is close to the published version
Extensible Dynamic Form (XDF) for Supplier Discovery
Creators: name: KANG, YAN
Publisher: name: Maryland Shared Open Access Repository
Year: 2011
Subjects: Data Collection
Extensible Dynamic Form
Supplier Discovery
Synonym-based search
XML Schema

description: Discovery of suppliers (supplier discovery) is essential for building a flexible network of suppliers in a supply chain. The first step for supplier discovery is to collect manufacturing capabilities of suppliers and requirements of customers. In traditional e-marketplaces, online form interfaces are typically used to collect the requirements and capabilities. However, those forms are mostly lack of flexibility to capture a variety of requirements and capabilities in a structured way. In this thesis, we propose new innovative form architecture called eXtensible Dynamic Form (XDF) to facilitate data collection process of supplier discovery. This architecture provides several key innovations including: 1) architecture for users (suppliers or customers) to create new structure of form for their own contents; 2) an intelligent search engine facilitating users to reuse the existing form components 3) hierarchical representation of the requirements and capabilities as XML instances. Experimental results demonstrate that the proposed architecture is valuable for facilitating the supplier discovery process
Spatial coherence control and analysis via micromirror-based mixed-state ptychography
Creators: name: Röhrich, Ruslan
name: Koenderink, Femius
name: Witte, Stefan
name: Loetgering, Lars
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Flexible and fast control of the phase and amplitude of coherent light, enabled by digital micromirror devices (DMDs) and spatial light modulators (SLMs), has been a driving force for recent advances in optical tweezers, nonlinear microscopy, and wavefront shaping. In contrast, engineering spatially partially coherent light remains widely elusive due to the lack of tools enabling a joint analysis and control sequence. Here, we report an approach to coherence engineering that combines a quasi-monochromatic, thermal source and a DMD together with a ptychographic scanning microscope. The reported method opens up new routes to low-cost coherence control, with applications in micromanipulation, nanophotonics, and quantitative phase contrast imaging.