cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Itinerant Curriculum Theory: Navigating the Waters of Power, Identity, and Praxis
Creators: name: Janson, Elizabeth
name: Silva, Carmelia Motta
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2017

description: This article critically examines João Paraskeva’s work (2011) in decolonizing the curriculum field with a focus on its extension into the daily theorizations and contradiction in U.S. public secondary education in the formation and oppression of identities. As language teachers, we both are confronted with the standardization of curriculum through Common Core that continues to block critical thinking and act as mechanism of colonization. Furthermore, we use our experiences in being made by the U.S. public education system in which we come from different cultural and linguistic backgrounds to see how culture and gender catalyzed how we were shaped in schools. This analysis evinced the need of Paraskeva’s (2011) concept of the Itinerant Curriculum Theory (ICT) in US public education and unveiled how the curriculum contains epistemicides (Santos, 2007; Paraskeva, 2011), linguicides (Thiong’o, 2009), commodification, anesthetization. Race to the Top (RTTT), No Child Left Behind (NCLB), and now Ever Child Succeeds Act (ECSA) perpetuate a process of colonizing the mind instead of creating a space for liberatory pedagogy and ICT in which identities, spiritualities, and knowledges would strengthen instead of facing erasure.

Elizabeth Janson is a high school English teacher in the South Coast of Massachusetts and received her PhD in Educational Leadership and Policy at UMass Dartmouth. She also is active in organizing efforts to engage the community about critical education issues. Her research focuses on analyzing educational policy and practice, particularly globalization, privatization, coloniality, decolonial theory, curriculum theory, and cultural politics. She has presented her research at both national and international conferences, including AERA, WERA, CIES, TRED, and AAACS. She is a contributing author to several books. including The Curriculum. Decanonizing the Field.

Carmelia Silva is the World Languages Department Chair and a Spanish teacher at Joseph Case High School. She has been teaching for sixteen years. She received her PhD in Educational Leadership and Policy with a research focus in cultural politics, identity, coloniality, language, and privatization of public education. She has presented at American Advancement for Curriculum Studies Conference, New England Educational Research Organization Conference, Center for International Educational Studies Conference, and TRED Conference.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 12 No 1 (2017)
Toward detection of terrestrial planets in the habitable zone of our closest neighbor: Proxima Centauri
Creators: name: Endl, Michael
name: Kuerster, Martin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The precision of radial velocity (RV) measurements to detect indirectly planetary companions of nearby stars has improved to enable the discovery of extrasolar planets in the Neptune and Super-Earth mass range. Discoveries of Earth-like planets by means of ground-based RV programs will help to determine the parameter Eta_Earth, the frequency of potentially habitable planets around other stars. In search of low-mass planetary companions we monitored Proxima Centauri (M5V) as part of our M dwarf program. In the absence of a significant detection, we use these data to demonstrate the general capability of the RV method in finding terrestrial planets. For late M dwarfs the classic liquid surface water habitable zone (HZ) is located close to the star, in which circumstances the RV method is most effective. We want to demonstrate that late M dwarfs are ideal targets for the search of terrestrial planets with the RV technique. We obtained differential RV measurements of Proxima Cen over a time span of 7 years with the UVES spectrograph at the ESO VLT. We determine upper limits to the masses of companions in circular orbits by means of numerical simulations. The RV data of Proxima Cen have a total rms scatter of 3.1 m/s and a period search does not reveal any significant signals. As a result of our companion limit calculations, we find that we successfully recover all test signals with RV amplitudes corresponding to planets with m sin i > 2 - 3 M_Earth residing inside the HZ of Proxima Cen with a statistical significance of >99%. Over the same period range, we can recover 50% of the test planets with masses of m sin i > 1.5 - 2.5 M_Earth. Based on our simulations, we exclude the presence of any planet in a circular orbit with m sin i > 1 M_Neptune at separations of a < 1 AU.
description: 8 pages, 4 figures, accepted for publication in Astronomy & Astrophysics
Curricula Apocrypha
Creators: name: Roberts, Patrick
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2017

description: Edited by João Paraskeva and Shirley Steinberg, Curriculum: Decanonizing the Field (2016, Peter Lang) presents a range of theoretical, historical, and practice-based perspectives on curriculum offered by contributors from both the Global South and the Global North. When taken as a whole, the thirty-six essays contained in this work (plus a brief Preface by William Reynolds and an Afterword by Steinberg) suggest that decanonization can be understood as a critical method for bringing into signatory relief the apocryphal boundaries of disciplined knowledge. As its various contributors roam across a diverse theoretical, methodological landscape, the volume also offers a transnational perspective on curriculum studies that moves beyond reductive models of comparative internationalization, thus generating a fresh vision of critical, emancipatory education. Based on my review, I conclude that contemporary curriculum studies is a transnational, transdisciplinary “distal confabulation” of scholars and practitioners committed to disarticulating the ideals that define our past and present. In this way, de/canonizing as method keeps vital our critical commitments to the apocryphal.

Patrick Roberts is an Associate Professor in the Foundations and Educational Policy Studies program based in the Department of Leadership, Educational Psychology and Foundations. He currently teaches classes in the history of American education, museum education, and ethics and education. He is the coordinator of NIU's Center for Peace and Transcultural Communication, which was developed in partnership with the University of Tetova in Macedonia. In 2010, Roberts served as a Fulbright Scholar in Bosnia and Herzegovina, where he studied museum education in post-conflict societies. He is the North American Sections Editor for the Journal of the American Association for the Advancement of Curriculum Studies.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 12 No 1 (2017)
The Mass Function of Active Black Holes in the Local Universe
Creators: name: Greene, Jenny E.
name: Ho, Luis C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first measurement of the black hole (BH) mass function for broad-line active galaxies in the local Universe. Using the ~9000 broad-line active galaxies from the Fourth Data Release of the Sloan Digital Sky Survey, we construct a broad-line luminosity function that agrees very well with the local soft X-ray luminosity function. Using standard virial relations, we then convert observed broad-line luminosities and widths into BH masses. A mass function constructed in this way has the unique capability to probe the mass region <10^6 M_sun, which, while insignificant in terms of total BH mass density, nevertheless may place important constraints on the mass distribution of seed BHs in the early Universe. The characteristic local active BH has a mass of ~10^7 M_sun radiating at 10% of the Eddington rate. The active fraction is a strong function of BH mass; at both higher and lower masses the active mass function falls more steeply than one would infer from the distribution of bulge luminosity. The deficit of local massive radiating BHs is a well-known phenomenon, while we present the first robust measurement of a decline in the space density of active BHs at low mass.
description: to appear in ApJ; 19 pages, 13 figures
A Systems Perspective of Democracy and Education: A Transformational Imperative
Creators: name: Fleener, M. Jayne
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2017

description: Starting with the premise and concern that American schools are not preparing students for critical thinking and complex learning, Craig Cunningham provides wisdom and perspectives from Dewey and systems theories to help us rethink education in a democratic culture and better serve the future needs of children and society. Recognizing the power of diversity for systems to adapt and for democracy to function, Cunningham’s goal is to present a new way of thinking about education. Extending his perspectives, this article further situates Dewey’s pragmatism in relation to the chaos and complexity perspectives of William Doll and his collaborators. Rethinking schooling through a curriculum dynamics lens informed by chaos and complexity perspectives offers guidance for the next big shift in public education in a democratic society.

M. Jayne Fleener has over thirty-five years of experience in K-12 and higher education, serving the last 17 years as an academic leader at three different institutions. Her areas of research interest include curriculum inquiry, educational policy, and innovation in education.

Recent Publications:

Fleener, M.J. (2016). Re-Searching methods in educational research: A transdisciplinary approach. In D. Stamovlasis & M. Koopmans. Complex Dynamical Systems in Education: Concepts, methods and applications. Berlin: Springer Publishing, pp. 9-21.

Fleener, M.J. (2016). Addressing Educations’ Most Intractable Problems: A Case of Failing Schools. Emergence Complexity & Organization: An International Transdisciplinary Journal of Complex Social Systems. Edition 1. doi: 10.emerg/10.17357.e0b582abc618906c0d995c2557c77bc3.

Bastian, K.C., Fortner, C.K., Chapman, A., Fleener, J., McIntyre, E., & Patriarca, L. (2016). Data sharing to drive the improvement of teacher preparation programs. Teachers College Record, 118(12), 1-29.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 12 No 1 (2017)
Dynamical low-rank approximations of solutions to the Hamilton--Jacobi--Bellman equation
Creators: name: Eigel, Martin
name: Schneider, Reinhold
name: Sommer, David
Publisher: name: Weierstrass Institute
Year: 2021
Subjects: subject: Dynamical low-rank approximation
subject: feedback control
subject: Hamilton-Jacobi-Bellman
subject: variational Monte Carlo
subject: tensor product approximation
subject: 49L20
subject: 49M37
subject: 93-08
subject: 93B52
subject: 15A69

description: We present a novel method to approximate optimal feedback laws for nonlinar optimal control basedon low-rank tensor train (TT) decompositions. The approach is based on the Dirac-Frenkel variationalprinciple with the modification that the optimisation uses an empirical risk. Compared to currentstate-of-the-art TT methods, our approach exhibits a greatly reduced computational burden whileachieving comparable results. A rigorous description of the numerical scheme and demonstrations ofits performance are provided.
NLO QCD corrections to pp -> ttbb+X via quark anti-quark annihilation
Creators: name: Bredenstein, Axel
name: Denner, Ansgar
name: Dittmaier, Stefan
name: Pozzorini, Stefano
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The process pp -> top anti-top bottom anti-bottom + X represents a very important background reaction to searches at the LHC, in particular to top anti-top H production where the Higgs boson decays into a bottom anti-bottom pair. A successful analysis of top anti-top H at the LHC requires the knowledge of direct top anti-top bottom anti-bottom production at NLO in QCD. We take the first step in this direction upon calculating the NLO QCD corrections to the subprocess initiated by quark anti-quark annihilation.
description: 6 pages, LaTeX, 4 postscript figures, to appear in proceedings of the "9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory", Sondershausen, Germany, April 20-25, 2008
Quark Coalescence based on a Transport Equation
Creators: name: Ravagli, L.
name: Rapp, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We employ the Boltzmann equation for describing hadron production from a quark-gluon plasma (QGP) in ultrarelativistic heavy-ion collisions. We propose resonance formation in quark-antiquark scattering as the dominant meson-production channel, which, in particular, ensures that energy is conserved in the recombination process. This, in turn, facilitates a more controlled extension of hadronization to low transverse momenta ($p_T$), and to address the experimentally observed transition from a hydrodynamic regime to constituent quark-number scaling (CQNS). Based on input distributions for strange and charm quarks with azimuthal asymmetries, $v_2(p_T)$, characteristic for RHIC energies, we recover CQNS at sufficiently high $p_T$, while at low $p_T$ a scaling with transverse kinetic energy is found, reminiscent to experiment. The dependence of the transition regime on microscopic QGP properties, i.e. resonance widths and $Q$-values in the $q+\bar q \to M$ process, is elucidated.
description: 7 pages, 6 figures
Nonextensive statistical mechanics and central limit theorems II - Convolution of q-independent random variables
Creators: name: Queiros, Silvio M. Duarte
name: Tsallis, Constantino
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this article we review recent generalisations of the central limit theorem for the sum of specially correlated (or q-independent) variables, focusing on q greater or equal than 1. Specifically, this kind of correlation turns the probability density function known as q-Gaussian, which emerges upon maximisation of the entropy Sq, into an attractor in probability space. Moreover, we also discuss a q-generalisation of a-stable Levy distributions which can as well be stable for this special kind of correlation.Within this context, we verify the emergence of a triplet of entropic indices which relate the form of the attractor, the correlation, and the scaling rate, similar to the q-triplet that connects the entropic indices characterising the sensitivity to initial conditions, the stationary state, and relaxation to the stationary state in anomalous systems.
description: 14 pages, 4 figures, and 1 table. To appear in the Proceedings of the conference CTNEXT07, Complexity, Metastability and Nonextensivity, Catania, Italy, 1-5 July 2007, Eds. S. Abe, H.J. Herrmann, P. Quarati, A. Rapisarda and C. Tsallis (American Institute of Physics, 2008) in press
Towards first-principles understanding of the metal-insulator transition in fluid alkali metals
Creators: name: Maebashi, H.
name: Takada, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By treating the electron-ion interaction as perturbation in the first-principles Hamiltonian, we have calculated the density response functions of a fluid alkali metal to find an interesting charge instability due to anomalous electronic density fluctuations occurring at some finite wave vector ${\bi Q}$ in a dilute fluid phase above the liquid-gas critical point. Since $|{\bi Q}|$ is smaller than the diameter of the Fermi surface, this instability necessarily impedes the electric conduction, implying its close relevance to the metal-insulator transition in fluid alkali metals.
description: 11 pages, 5 figures
Plant Regeneration from Young Shoot of Nilegrass (Acroceras macrum)
Creators: name: Anurug Poeaim
name: Sarun Sukhawat
name: Jantakarn Arananant
name: Pradit Pongtongkam
Publisher: name: Genetics Society of Thailand
Year: 2009
Subjects: Nilegrass, embryogenic callus, regeneration

description: 1, 2, Thai Journal of Genetics
ดีเอ็นเอไมโครอาเรย์และการเปรียบเทียบจีโนมของแบคทีเรีย
Creators: name: กรรณิการ์ ดวงมาลย์
Publisher: name: Genetics Society of Thailand
Year: 2009
Subjects: ดีเอ็นเอไมโครอาเรย์, จีโนม, แบคทีเรีย

description: 1, 2, Thai Journal of Genetics
Identification of bacterial blight resistance gene in hybrid rice (BC1F5)
Creators: name: Perapong Kehung
name: Supanyika Sengsai
name: Suniyom Traprab
name: Surin Peyachoknagul
name: Pradit Pongtongkam
Publisher: name: Genetics Society of Thailand
Year: 2010
Subjects: bacterial blight, KDML105 rice, AFLP,xa5 gene

description: 1, 3, Thai Journal of Genetics
Exact half-BPS Type IIB interface solutions I: Local solution and supersymmetric Janus
Creators: name: D'Hoker, Eric
name: Estes, John
name: Gutperle, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The complete Type IIB supergravity solutions with 16 supersymmetries are obtained on the manifold $AdS_4 \times S^2 \times S^2 \times Σ$ with $SO(2,3) \times SO(3) \times SO(3)$ symmetry in terms of two holomorphic functions on a Riemann surface $Σ$, which generally has a boundary. This is achieved by reducing the BPS equations using the above symmetry requirements, proving that all solutions of the BPS equations solve the full Type IIB supergravity field equations, mapping the BPS equations onto a new integrable system akin to the Liouville and Sine-Gordon theories, and mapping this integrable system to a linear equation which can be solved exactly. Amongst the infinite class of solutions, a non-singular Janus solution is identified which provides the AdS/CFT dual of the maximally supersymmetric Yang-Mills interface theory discovered recently. The construction of general classes of globally non-singular solutions, including fully back-reacted $AdS_5 \times S^5$ and supersymmetric Janus doped with D5 and/or NS5 branes, is deferred to a companion paper.
description: LaTeX, 69 pages, 3 figures, v2: references added
Multiplication kernels
Creators: name: Kontsevich, Maxim
name: Odesskii, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce the notion of multiplication kernels of birational and $D$-module type and give various examples. We also introduce the notion of a semi-classical multiplication kernel associated with an integrable system and discuss its quantization. Finally, we discuss geometric and algebraic aspects of method of separation of variables, and describe hypothetically a cyclic $D$-module for the generalized multiplication kernels for Hitchin systems for groups $GL_r$.
description: 56 pages, latex
Handling Burley Tobacco on Portable Curing Frames
Creators: name: Yoder, E. E.
name: Henson, W. H.
name: Yoder, E. E.
name: Henson, W. H.
Publisher: name: Unknown
Year: 1974
Subjects: Crop Production/Industries
Labor and Human Capital
Production Economics

description: Excerpt from the report Summary: Burley tobacco can be handled on portable curing frames with a front-mounted tractor-loader with about half the man-hours per acre required by conventional tobacco production practice. Approximately half the man-hours required by this partly mechanized handling system involves manual labor. The work, performed by a smaller crew, is both easier and safer than that performed with conventional handling methods. Unit production costs of the experimental system are generally independent of acreage, with the exception of amortization of tractor-loader and wagons.
Nucleon momentum distribution of $^{56}\text{Fe}$ from the axially deformed relativistic mean-field model with nucleon--nucleon correlations
Creators: name: Wang, Xuezhi
name: Niu, Qinglin
name: Zhang, Jinjuan
name: Lyu, Mengjiao
name: Liu, Jian
name: Xu, Chang
name: Ren, Zhongzhou
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nucleon momentum distribution (NMD), particularly its high-momentum components, is essential for understanding the nucleon--nucleon ($ NN $) correlations in nuclei. Herein, we develop the studies of NMD of $^{56}\text{Fe}$ from the axially deformed relativistic mean-field (RMF) model. Moreover, we introduce the effects of $ NN $ correlation into the RMF model from phenomenological models based on deuteron and nuclear matter. For the region $ kk_{\text{F}} $, the high-momentum components of the RMF model are modified by the effects of $ NN $ correlation, which agree with the experimental data. Comparing the NMD of relativistic and non-relativistic mean-field models, the relativistic effects on nuclear structures in momentum space are analyzed. Finally, by analogizing the tensor correlations in deuteron and Jastrow-type correlations in nuclear matter, the behaviors and contributions of $ NN $ correlations in $^{56}\text{Fe}$ are further analyzed, which helps clarify the effects of the tensor force on the NMD of heavy nuclei.
description: 12 pages, 10 figures, This article has been published in SCIENCE CHINA Physics, Mechanics & Astronomy(SCPMA), and the original publication is available at www.scichina.com and www.springerlink.com
Strong characterizing sequences of countable groups
Creators: name: Beiglböck, Mathias
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J71; 11K36

description: András Biró and Vera Sós prove that for any subgroup $G$ of $\T$ generated freely by finitely many generators there is a sequence $A\subset \N$ such that for all $β\in \T$ we have ($\|.\|$ denotes the distance to the nearest integer) $$β\in G \Rightarrow \sum_{n\in A} \| n β\| < \infty,\quad \quad \quad β\notin G \Rightarrow \limsup_{n\in A, n \to \infty} \|n β\| > 0. $$ We extend this result to arbitrary countable subgroups of $\T$. We also show that not only the sum of norms but the sum of arbitrary small powers of these norms can be kept small. Our proof combines ideas from the above article with new methods, involving a filter characterization of subgroups of $\T$.
Photon-Emission Statistics induced by Electron Tunnelling in Plasmonic Nanojunctions
Creators: name: Avriller, R.
name: Schaeverbeke, Q.
name: Frederiksen, T.
name: Pistolesi, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the statistics of photons emitted by tunneling electrons in a single electronic level plasmonic nanojunction. We compute the waiting-time distribution of successive emitted photons $w(τ)$. When the cavity damping rate $κ$ is larger than the electronic tunneling rate $Γ$, we show that in the photon-antibunching regime, $w(τ)$ indicates that the average delay-time between two successive photon emission events is given by $1/Γ$. This is in contrast with the usually considered second-order correlation function of emitted photons, $g^{(2)}(τ)$, which displays the single time scale $1/κ$. Our analysis shows a relevant example for which $w(τ)$ gives independent information on the photon-emission statistics with respect to $g^{(2)}(τ)$, leading to a physical insight on the problem. We discuss how this information can be extracted from experiments even in presence of a non-perfect photon detection yield.
description: 5 pages and 4 figures (main paper), 10 pages and 9 figures (supplementary material). Updated version. Published in Phys. Rev. B. Letter
Electron coherence at low temperatures: The role of magnetic impurities
Creators: name: Saminadayar, Laurent
name: Mohanty, Pritiraj
name: Webb, Richard A.
name: Degiovanni, Pascal
name: Bäuerle, Christopher
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We review recent experimental progress on the saturation problem in metallic quantum wires. In particular, we address the influence of magnetic impurities on the electron phase coherence time. We also present new measurements of the phase coherence time in ultra-clean gold and silver wires and analyse the saturation of \tauphi in these samples, cognizant of the role of magnetic scattering. For the cleanest samples, Kondo temperatures below 1 mK and extremely-small magnetic-impurity concentration levels of less than 0.08 ppm have to be assumed to attribute the observed saturation to the presence of magnetic impurities.
description: review article, 14 pages, 11 figures. Physica E (in press)
Quantum Dot in Z-shaped Graphene Nanoribbon
Creators: name: Wang, Z. F.
name: Zheng, Huaixiu
name: Shi, Q. W.
name: Chen, Jie
name: Li, Qunxiang
name: Hou, J. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Stimulated by recent advances in isolating graphene, we discovered that quantum dot can be trapped in Z-shaped graphene nanoribbon junciton. The topological structure of the junction can confine electronic states completely. By varying junction length, we can alter the spatial confinement and the number of discrete levels within the junction. In addition, quantum dot can be realized regardless of substrate induced static disorder or irregular edges of the junction. This device can be used to easily design quantum dot devices. This platform can also be used to design zero-dimensional functional nanoscale electronic devices using graphene ribbons.
description: 4 pages, 3 figures
Secondary invariants for Frechet algebras and quasihomomorphisms
Creators: name: Perrot, Denis
Publisher: name: arXiv
Year: 2008
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: A Frechet algebra endowed with a multiplicatively convex topology has two types of invariants: homotopy invariants (topological K-theory and periodic cyclic homology) and secondary invariants (multiplicative K-theory and the non-periodic versions of cyclic homology). The aim of this paper is to establish a Riemann-Roch-Grothendieck theorem relating direct images for homotopy and secondary invariants of Frechet m-algebras under finitely summable quasihomomorphisms.
description: 80 pages. v1: This is essentially the first part of the preprint arXiv:0706.1937, with improvements. v2: minor corrections, almost the published version
A Three-Decade Outburst of the LMC Luminous Blue Variable R127 Draws to a Close
Creators: name: Walborn, Nolan R.
name: Stahl, Otmar
name: Gamen, Roberto C.
name: Szeifert, Thomas
name: Morrell, Nidia I.
name: Smith, Nathan
name: Howarth, Ian D.
name: Humphreys, Roberta M.
name: Bond, Howard E.
name: Lennon, Daniel J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The paradigmatic Luminous Blue Variable R127 in the Large Magellanic Cloud has been found in the intermediate, peculiar early-B state, and substantially fainter in visual light, signaling the final decline from its major outburst that began between 1978 and 1980. This transformation was detected in 2008 January, but archival data show that it began between early 2005 and early 2007. In fact, significant changes from the maximum, peculiar A-type spectrum, which was maintained from 1986 through 1998, had already begun the following year, coinciding with a steep drop in visual light. We show detailed correspondences between the spectrum and light, in which the decline mimics the rise. Moreover, these trends are not monotonic but are characterized by multiple spikes and dips, which may provide constraints on the unknown outburst mechanism. Intensive photometric and spectroscopic monitoring of R127 should now resume, to follow the decline presumably back to the quiescent Ofpe/WN9 state, in order to fully document the remainder of this unique observational opportunity.
description: 15 pages, 2 tables, 5 figures; accepted for ApJ Letters
Exact half-BPS Type IIB interface solutions II: Flux solutions and multi-Janus
Creators: name: D'Hoker, Eric
name: Estes, John
name: Gutperle, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Regularity and topology conditions are imposed on the exact Type IIB solutions on $AdS_4 \times S^2 \times S^2 \times Σ$ with 16 supersymmetries, which were derived in a companion paper. We construct an infinite class of regular solutions with varying dilaton, and non-zero 3-form fluxes. Our solutions may be viewed as the fully back-reacted geometries of $AdS_5 \times S^5$ (or more generally, Janus) doped with D5 and/or NS5 branes. The solutions are parametrized by the choice of an arbitrary genus $g$ hyper-elliptic Riemann surface $Σ$ with boundary, all of whose branch points are restricted to lie on a line. For genus 0, the Janus solution with 16 supersymmetries and 6 real parameters is recovered; its topology coincides with that of $AdS_5 \times S^5$. The genus $g\geq 1$ solutions are parametrized by a total of $4g+6$ real numbers, $2g-1$ of which are the real moduli of $Σ$. The solutions have $2g+2$ asymptotic $AdS_5 \times S^5$ regions, $g$ three-spheres with RR 3-form charge, and another $g$ with NSNS 3-form charge. Collapse of consecutive branch points of $Σ$ yields singularities which correspond to D5 and NS5 branes in the probe limit. It is argued that the AdS/CFT dual gauge theory to each of our solutions consists of a 2+1-dimensional planar interface on which terminate $2g+2$ half-Minkowski 3+1-dimensional space-time $\mathcal{N}=4$ super-Yang-Mills theories. Generally, the $\\mathcal{N}=4$ theory in each Minkowski half-space-time may have an independent value of the gauge coupling, and the interface may support various operators, whose interface couplings are further free parameters of the dual gauge theory.
description: LaTeX, 64 pages, 10 figures
A New Home
Creators: name: Mayer, Susan Jean
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2016

description: We are glad to be returning to active publishing again after a year’s hiatus, during which we relocated JAAACS from its original site at the University of Wisconsin-Stout to its new home at the University of British Columbia. We want to take this opportunity to thank UBC, and especially Peter Grimmett, head of Curriculum and Pedagogy, for welcoming JAAACS in and for providing us with a promising new publishing platform.


This first issue of our eleventh volume also marks a transition in the editorial team, occasioned by the retirement of our founding editor, Alan Block, last year after ten years of dedicated service. Susan Jean Mayer, who is replacing Alan as editor-in-chief, and Patrick Roberts, who remains section editor of North American Literature, would like to welcome James Jupp to the team as section editor of International Literature. We are all also looking forward to working with our previous section editor of International Literature, João Paraskeva, in other capacities in coming years.


Our current issue begins with the AAACS 2015 Presidential Address, given by Awad Ibrahim, who employs Hip-Hop in exploring the connections between educational literacy, youth and the boundaries of education. Following Ibrahim’s address, Bernadette Baker revisits the Dalai Lama’s 2005 exploration of Buddhist and Western conceptions of truth and empiricism, raising questions about the ontological and epistemological understandings current in our field. Next, Susan Jean Mayer considers some tensions in Gert Biesta’s most recent book, The Beautiful Risk of Education, which represents the third in what Biesta has come to see as a tripartite exposition of his theory of curriculum.


In our fourth piece, James Magrini revisits a 1968 essay on Heidegger by Dwayne Huebner, which can be found in the 1999 collection of Huebner’s work, The Lure of the Transcendent. Magrini explores Heidegger’s and Huebner’s understandings of the relations between language and being in order to pursue the implications of those relations, in Huebner’s case, for the pedagogical relationship. We close our first volume in our new institutional home with a beautiful and evocative tribute to the life and work of Maxine Greene by Molly Quinn, her dear colleague and friend.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 11 No 1 (2016)
Critical Hip-Hop Ill-Literacies: Re-mixing Culture, Language and the Politics of Boundaries in Education
Creators: name: Ibrahim, Awad
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2016

description: In his 2015 Presidential Address, Awad Ibrahim argues that educators need to pay more attention to Hip-Hop from a curricular and pedagogical perspective. Against the backdrop of the four examples he provides of the transformational use of Hip-Hop by youth across the globe, Ibrahim asks us to interest ourselves more deeply in the questions about the nature of literacy that Hip-Hop raises and in the self-empowered youth who are using this musical form to make their own kind of change in the world.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 11 No 1 (2016)
Long-term series of chlorophyll-a concentration in Brazilian semiarid lakes from Modis imagery
Creators: name: Ventura, Dhalton
Publisher: name: figshare
Year: 2021
Subjects: subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences
subject: Hydrology
subject: Limnology
subject: 40608 Surfacewater Hydrology

description: Datasets, figures, kml and scripts pertaining to a research project from Ventura, DLT; Martinez, JM; Attayde, JL et al. on the application of Modis imagery to long-term chlorophyll-a assessment in Brazilian semiarid lakes.
Evaporating black holes: constraints on anomalous emission mechanisms
Creators: name: Yuan, Chen
name: Brito, Richard
name: Cardoso, Vitor
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Hawking radiation of astrophysical black holes is minute and thought to be unobservable. However, different mechanisms could contribute to an anomalously high emission rate: extra dimensions, new "dark" families of bosons or fermions, or a lower fundamental Planck scale. Do black holes flood the Universe with gravitational waves via mass loss? Here, we show that the formation of black hole binaries and the absence of a stochastic background of gravitational waves can limit the emission rate to $|\dot{M}|\lesssim 10^{-15}M_{\odot}/{\rm yr}$, seven orders of magnitude more stringent than bounds from resolvable inspiralling binaries.
description: 5 pages, 2 figures, 1 table
Effect of different Dzyaloshinskii-Moriya interactions on entanglement in the Heisenberg XYZ chain
Creators: name: Li, Da-Chuang
name: Cao, Zhuo-Liang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we study the thermal entanglement in a two-qubit Heisenberg XYZ system with different Dzyaloshinskii-Moriya (DM) couplings. We show that different DM coupling parameters have different influences on the entanglement and the critical temperature. In addition, we find that when $J_{i}$ ($i$-component spin coupling interaction) is the largest spin coupling coefficient, $D_{i}$ ($i$-component DM interaction) is the most efficient DM control parameter, which can be obtained by adjusting the direction of DM interaction.
description: 5 pages, 6 figures
Effects of the cosmological expansion on the bubble nucleation rate for relativistic first-order phase transitions
Creators: name: Metaxas, Dimitrios
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I calculate the first corrections to the dynamical pre-exponential factor of the bubble nucleation rate for a relativistic first-order phase transition in an expanding cosmological background by estimating the effects of the Hubble expansion rate on the critical bubbles of Langer's statistical theory of metastability. I also comment on possible applications and problems that arise when one considers the field theoretical extensions of these results (the Coleman-De Luccia and Hawking-Moss instantons and decay rates).
description: 14 pages, LaTeX, no figures, final version to appear in PRD
An Encounter with an Encounter: Truth, Evidence and Reality in Cross-Border Moments
Creators: name: Baker, Bernadette
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2016

description: Bernadette Baker provides a critical reading of the Dalai Lama’s recent treatment of the contrasts between Buddhist conceptualizations of truth, evidence, and reality and those of the so-called Western sciences. Baker develops a number of intertwining lines of thought, including a central concern with the place of border-thinking in all such conceptualizations. Throughout, questions are raised regarding how we, as a field, choose to conceive of the relations between empirical reality and truth.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 11 No 1 (2016)
Risking Ourselves in Classrooms
Creators: name: Mayer, Susan Jean
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2016

description: Susan Jean Mayer considers Gert Biesta’s most recent book, The Beautiful Risk of Education (2014), in which Biesta draws upon post-war Continental philosophy in support of his call for the thoughtful nurture of subjectification processes within schools. Mayer takes up questions regarding the relationship between the philosophical resources Biesta provides and all three of the dimensions of pedagogical purpose Biesta first framed in his previous book and cites again here.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 11 No 1 (2016)
Low Temperature Shear Modulus Changes in Solid 4-He and Connection to Supersolidity
Creators: name: Day, James
name: Beamish, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Superfluidity, liquid flow without friction, is familiar in helium. The first evidence for "supersolidity", its analogue in quantum solids, came from recent torsional oscillator (TO) measurements involving 4-He. At temperatures below 200 mK, TO frequencies increased, suggesting that some of the solid decoupled from the oscillator. This behavior has been replicated by several groups but solid 4-He does not respond to pressure differences and persistent currents and other signatures of superflow have not been seen. Both experiments and theory indicate that defects are involved. These should also affect the solid's mechanical behavior and so we have measured the shear modulus of solid 4-He at low frequencies and strains. We observe large increases below 200 mK, with the same dependence on measurement amplitude, 3-He impurity concentration and annealing as the decoupling seen in TO experiments. This unusual elastic behavior is explained in terms of a dislocation network which is pinned by 3-He at the lowest temperatures but becomes mobile above 100 mK. The frequency changes in TO experiments appear to be related to the motion of these dislocations, perhaps by disrupting a possible supersolid state.
description: 18 pages, 4 figues, Supplementary Information
Form in contemporary anglophone Caribbean poetry
Creators: name: Delaney, Kelsi
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: This thesis offers the first extended form-led exploration of contemporary anglophone Caribbean poetry by emerging and established writers from across the Caribbean and Caribbean diaspora. The thesis highlights and explores five key areas of growth and significance in anglophone Caribbean poetic form: metaphoric representations of poetic form, notions of received form and the sonnet, the limits of poetic expression and prose poetry, expansions of poetic expression and multiple-form poetry, and poetic medium and oral poetries. Through detailed close readings of poems by over twenty-five poets, I observe the technical breadth of contemporary Caribbean poetry, drawing attention to the innovative aesthetic practises of contemporary Caribbean writers. The thesis argues that contemporary Caribbean poets frequently put their aesthetic strategies and inclinations under critical scrutiny within their poetry, and that seemingly aesthetic aspects of poetry, such as its form, can encode nuanced expressions of cultural politics. I suggest that stylistic choices, such as the use of received forms and references to cultural and aesthetic traditions, have no one ubiquitous metaphorical inference, and that form and cultural politics cannot be straightforwardly mapped together. Therefore, I argue that it is only through close attention to the manner and context in which forms are employed that their significations can be observed. Contrary to the notion that a focus on aesthetic concerns might represent a deprioritisation of the cultural, political, social and historical questions that motivate much of literary studies, I demonstrate that analysis of poetic form is a particularly effective methodology for exploring the connection between poetry and the world from which it originates. I also highlight the problematic impacts of eurocentrism in taxonomies of poetic form, demonstrating the need for increased attention to cultural diversity within poetry studies in order to better represent the full range of contemporary anglophone Caribbean poetry in a global context.
First emittance measurement of the beam-driven plasma wakefield accelerated electron beam
Creators: name: Shpakov, V.
name: Anania, M. P.
name: Behtouei, M.
name: Bellaveglia, M.
name: Biagioni, A.
name: Cesarini, M.
name: Chiadroni, E.
name: Cianchi, A.
name: Costa, G.
name: Croia, M.
name: Del Dotto, A.
name: Diomede, M.
name: Dipace, F.
name: Ferrario, M.
name: Galletti, M.
name: Giribono, A.
name: Liedl, A.
name: Lollo, V.
name: Magnisi, L.
name: Mostacci, A.
name: Di Pirro, G.
name: Piersanti, L.
name: Pompili, R.
name: Romeo, S.
name: Rossi, A. R.
name: Scifo, J.
name: Vaccarezza, C.
name: Villa, F.
name: Zigler, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Next-generation plasma-based accelerators can push electron beams to GeV energies within centimetre distances. The plasma, excited by a driver pulse, is indeed able to sustain huge electric fields that can efficiently accelerate a trailing witness bunch, which was experimentally demonstrated on multiple occasions. Thus, the main focus of the current research is being shifted towards achieving a high quality of the beam after the plasma acceleration. In this letter we present beam-driven plasma wakefield acceleration experiment, where initially preformed high-quality witness beam was accelerated inside the plasma and characterized. In this experiment the witness beam quality after the acceleration was maintained on high level, with $0.2\%$ final energy spread and $3.8~μm$ resulting normalized transverse emittance after the acceleration. In this article, for the first time to our knowledge, the emittance of the PWFA beam was directly measured.
The Language of Teaching in Dwayne Huebner’s Phenomenology The Poetic Essence of Language for the New Re-Conceptualization of Curriculum
Creators: name: Magrini, James M.
Publisher: name: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS)
Year: 2016

description: James M. Magrini invites us to return to Huebner’s groundbreaking essays from the 1960s, 70s, and 80s (collected in 1999 under the title, The Lure of the Transcendent) and to reconsider the still radical nature of some of these early insights of the reconceptualized field. Specifically, Magrini focuses on Huebner’s use of Heidegger to probe the ontological relationship between language and being and in reconceiving the use of language in teaching and curriculum as a poetic phenomenon.
description: Journal of the American Association for the Advancement of Curriculum Studies (JAAACS), Vol 11 No 1 (2016)
Expressivity of Parameterized and Data-driven Representations in Quality Diversity Search
Creators: name: Hagg, Alexander
name: Berns, Sebastian
name: Asteroth, Alexander
name: Colton, Simon
name: Bäck, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: We consider multi-solution optimization and generative models for the generation of diverse artifacts and the discovery of novel solutions. In cases where the domain's factors of variation are unknown or too complex to encode manually, generative models can provide a learned latent space to approximate these factors. When used as a search space, however, the range and diversity of possible outputs are limited to the expressivity and generative capabilities of the learned model. We compare the output diversity of a quality diversity evolutionary search performed in two different search spaces: 1) a predefined parameterized space and 2) the latent space of a variational autoencoder model. We find that the search on an explicit parametric encoding creates more diverse artifact sets than searching the latent space. A learned model is better at interpolating between known data points than at extrapolating or expanding towards unseen examples. We recommend using a generative model's latent space primarily to measure similarity between artifacts rather than for search and generation. Whenever a parametric encoding is obtainable, it should be preferred over a learned representation as it produces a higher diversity of solutions.
description: For code for reproducing experiments, see https://github.com/alexander-hagg/ExpressivityGECCO2021