cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
OzDES Reverberation Mapping Program: Mg II Lags and R-L relation
Creators: name: Yu, Zhefu
name: Martini, Paul
name: Penton, A.
name: Davis, T. M.
name: Kochanek, C. S.
name: Lewis, G. F.
name: Lidman, C.
name: Malik, U.
name: Sharp, R.
name: Tucker, B. E.
name: Aguena, M.
name: Annis, J.
name: Bertin, E.
name: Bocquet, S.
name: Brooks, D.
name: Rosell, A. Carnero
name: Carollo, D.
name: Kind, M. Carrasco
name: Carretero, J.
name: Costanzi, M.
name: da Costa, L. N.
name: Pereira, M. E. S.
name: De Vicente, J.
name: Diehl, H. T.
name: Doel, P.
name: Everett, S.
name: Ferrero, I.
name: García-Bellido, J.
name: Gatti, M.
name: Gerdes, D. W.
name: Gruen, D.
name: Gruendl, R. A.
name: Gschwend, J.
name: Gutierrez, G.
name: Hinton, S. R.
name: Hollowood, D. L.
name: Honscheid, K.
name: James, D. J.
name: Kuehn, K.
name: Mena-Fernández, J.
name: Menanteau, F.
name: Miquel, R.
name: Nichol, B.
name: Paz-Chinchón, F.
name: Pieres, A.
name: Malagón, A. A. Plazas
name: Raveri, M.
name: Romer, A. K.
name: Sanchez, E.
name: Scarpine, V.
name: Sevilla-Noarbe, I.
name: Smith, M.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Vincenzi, M.
name: Walker, A. R.
name: Weaverdyck, N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The correlation between the broad line region radius and continuum luminosity ($R-L$ relation) of active galactic nuclei (AGN) is critical for single-epoch mass estimates of supermassive black holes (SMBHs). At $z \sim 1-2$, where AGN activity peaks, the $R-L$ relation is constrained by the reverberation mapping (RM) lags of the Mg II line. We present 25 Mg II lags from the Australian Dark Energy Survey (OzDES) RM project based on six years of monitoring. We define quantitative criteria to select good lag measurements and verify their reliability with simulations based on both the damped random walk stochastic model and the re-scaled, re-sampled versions of the observed lightcurves of local, well-measured AGN. Our sample significantly increases the number of Mg II lags and extends the $R-L$ relation to higher redshifts and luminosities. The relative iron line strength $\mathcal{R}_{\rm Fe}$ has little impact on the $R-L$ relation. The best-fit Mg II $R-L$ relation has a slope $α= 0.39 \pm 0.08$ with an intrinsic scatter $σ_{\rm rl} = 0.15^{+0.03}_{-0.02}$. The slope is consistent with previous measurements and shallower than the H$β$ $R-L$ relation. The intrinsic scatter of the new $R-L$ relation is substantially smaller than previous studies and comparable to the intrinsic scatter of the H$β$ $R-L$ relation. Our new $R-L$ relation will enable more precise single-epoch mass estimates and SMBH demographic studies at cosmic noon.
description: 16 pages, 8 figures; MNRAS, Volume 522, pp.4132
title: Transition des élèves de l'école au postobligatoire
title: quels rôles pour les familles et les enseignants
titleType: Subtitle
Creators: name: Amstutz, Dominique
name: Keller, CHloé
Publisher: name: Unknown
Year: 0
Subjects: subject: transition
subject: rôle
subject: école
subject: famille
subject: collaboration
subject: accompagnement

description: La transition entre l'école obligatoire et une formation postobligatoire (apprentissage, gymnase, etc) comporte de multiples enjeux : durant un cours laps de temps, le jeune doit non seulement apprendre à se connaître, forger son identité, mais également faire des choix qui auront un impact important sur sa vie future. Or cette transition ne va pas de soi. Les nombreuses mesures de transition (OPTI, Semo, etc) qui se sont développées ces dernières années témoignent des difficultés que les jeunes rencontrent pour choisir une voie professionnelle et pour trouver une place de formation. Face à ce constat, nous nous sommes demandés comment préparer les adolescents à la transition, afin de les aider à bien la vivre. Qui doit se charger de cette préparation ? Il paraît logique que les adultes qui entourent les jeunes se sentent concernés. Parmi eux, nous trouvons notamment les parents et les enseignants. La Loi sur l'enseignement obligatoire ainsi que le Plan d'études romand donnent effectivement un rôle dans cette préparation tant aux enseignants qu'aux parents, et les incitent à collaborer. Nous nous sommes donc interrogés sur les modalités de cette collaboration et avons cherché à définir le rôle de chacun, d'abord au moyen de ressources théoriques, puis en interrogeant les différents acteurs concernés : enseignants, parents, élèves. Cela nous a permis de recueillir les représentations qu'ils se font de leur rôle dans la transition, ainsi que les actions pratiques mises en oeuvre pour y répondre. Nous avons ainsi esquissé une forme de répartition des tâches entre école et famille.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire I
Space Mapping for PDE Constrained Shape Optimization
Creators: name: Blauth, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 49Q10, 49M41, 65K05, 35Q93

description: The space mapping technique is used to efficiently solve complex optimization problems. It combines the accuracy of fine model simulations with the speed of coarse model optimizations to approximate the solution of the fine model optimization problem. In this paper, we propose novel space mapping methods for solving shape optimization problems constrained by partial differential equations (PDEs). We present the methods in a Riemannian setting based on Steklov-Poincaré-type metrics and discuss their numerical discretization and implementation. We investigate the numerical performance of the space mapping methods on several model problems. Our numerical results highlight the methods' great efficiency for solving complex shape optimization problems.
Récits de terrain sur la conduite d'un "atelier de recherche sur la condition humaine" en classe d'enfantines en Suisse
Creators: name: Vinuesa Robles, Juan Francisco
Publisher: name: Unknown
Year: 0
Subjects: subject: Philosophie
subject: enfantines (1P-2P HarmoS)
subject: Jacques Lévine
subject: pratique réflexive
subject: journal
subject: écriture

description: Depuis les années 1970 la pratique de la philosophie se démocratise au sein de l’école primaire. L’enfant y est invité à s’exprimer à travers le débat collectif autour de notions philosophiques. La méthode Lipman propose ses livres comme guides et la méthode Tozzi propose l’acquisition de compétences réflexives à travers la discussion à visée philosophique. Toutes deux demandent de l’enseignant un guidage actif du débat pour pousser à la problématisation et à la discussion argumentée. Mais depuis la fin des années 1990, Jacques Lévine propose une nouvelle approche, minoritairement représentée dans la littérature, de la pratique de la philosophie dès la 1P HarmoS. Il y propose un cadre qui vise à favoriser l’expression libre des participants autour d’une question à portée philosophique. L’enseignant, instigateur, est invité à fournir à ses hôtes un espace de parole dans lequel son silence est requis comme gage de sa confiance. Ce mémoire est le récit de mon expérience de la méthode de Jacques Lévine en classe de 1P- 2P HarmoS. Pour instaurer et réguler six moments de philosophie selon la méthode de Lévine, j’ai tenu l’écriture d’un journal relatant mon expérience et les réflexions qui en ont découlé. Ces écrits se basaient d’abord sur la mémoire que j’avais des moments vécus, puis sur l’écoute des enregistrements audio. Par la suite mon journal fit l’objet d’un récit qui avait pour but de résumer et d’extraire différentes problématiques que j’ai par la suite généralisées pour partager mon expérience. Le travail réflexif entrepri dans cette monographie vise à permettre une meilleure compréhension de l’influence de l’enseignant en tant que sujet acteur et observateur dans sa classe à l’heure de conduire un atelier à portée philosophique. A travers ce terrain expérimental découlent des questions propres au statut d’étudiant en dernière année de formation, au futur praticien, au scripteur mais aussi aux particularités d’un tel dispositif philosophique.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Quels ont été les éléments déclencheurs de la peur des mathématiques
Creators: name: Quaglia, Olivia
name: Braun Martín, Mélanie
Publisher: name: Unknown
Year: 0
Subjects: subject: blocage mathématique
subject: impuissance apprise
subject: émotions

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
The hunt for the Milky Way's accreted disc
Creators: name: Ruchti, Gregory R.
name: Read, Justin I.
name: Feltzing, Sofia
name: Pipino, Antonio
name: Bensby, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Milky Way is expected to host an accreted disc of stars and dark matter. This forms as massive >1:10 mergers are preferentially dragged towards the disc plane by dynamical friction and then tidally shredded. The accreted disc likely contributes only a tiny fraction of the Milky Way's thin and thick stellar disc. However, it is interesting because: (i) its associated `dark disc' has important implications for experiments hoping to detect a dark matter particle in the laboratory; and (ii) the presence or absence of such a disc constrains the merger history of our Galaxy. In this work, we develop a chemo-dynamical template to hunt for the accreted disc. We apply our template to the high-resolution spectroscopic sample from Ruchti et al. (2011), finding at present no evidence for accreted stars. Our results are consistent with a quiescent Milky Way with no >1:10 mergers since the disc formed and a correspondingly light `dark disc'. However, we caution that while our method can robustly identify accreted stars, our incomplete stellar sample makes it more challenging to definitively rule them out. Larger unbiased stellar samples will be required for this.
description: 14 pages; 8 figures; 1 table. Accepted for publication in MNRAS
Nearby active galactic nuclei and starburst galaxies as sources of the measured UHECRs anisotropy signal
Creators: name: de Oliveira, Cainã
name: de Souza, Vitor
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Pierre Auger and the Telescope Array observatories have measured independent and statistical significant anisotropy in the arrival direction of ultra-high-energy cosmic rays (UHECR). Three hotspot regions with relative excess of events and a dipole signal have been identified in different regions of the sky and energy ranges. In this paper, we investigate the conditions under which these anisotropy signal could be generated by nearby (<23 Mpc) active galactic nuclei (AGN) and/or starburst galaxies (SBG). We studied a wide range of possibilities including injected nuclei (p, He, N, Si, and Fe), three UHECR luminosity proxies and three extragalactic magnetic field models. The results shows that both local AGN and SBG are needed to describe all the anisotropy signal. The contribution of AGN to hotspots and to the generation of the dipole is dominant in most cases. SBG is required only to explain the hotspot measured by the Telescope Array Observatory.
MPEC 2024-R350 : 2024 RW25
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RW25

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Study of bounds on non-equilibrium fluctuations for asymmetrically driven quantum Otto engine
Creators: name: Mohanta, Sandipan
name: Saha, Madhumita
name: Venkatesh, B. Prasanna
name: Agarwalla, Bijay Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: For a four-stroke asymmetrically driven quantum Otto engine with working medium modeled by a single qubit, we study the bounds on non-equilibrium fluctuations of work and heat. We find strict relations between the fluctuations of work and individual heat for hot and cold reservoirs in arbitrary operational regimes. Focusing on the engine regime, we show that the ratio of non-equilibrium fluctuations of output work to input heat from the hot reservoir is both upper and lower bounded. As a consequence, we establish hierarchical relation between the relative fluctuations of work and heat for both cold and hot reservoirs and further make a connection with the thermodynamic uncertainty relations. We discuss the fate of these bounds also in the refrigerator regime. The reported bounds, for such asymmetrically driven engines, emerge once both the time-forward and the corresponding reversed cycles of the engine are considered on an equal footing. We also extend our study and report bounds for a parametrically driven harmonic oscillator Otto engine.
description: 14 pages, 6 figures
Characterization of curves in $C^{(2)}$
Creators: name: Sáez, Meritxell
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper we characterize the irreducible curves lying in $C^{(2)}$. We prove that a curve $B$ has a degree one morphism to $C^{(2)}$ with image a curve of degree $d$ with irreducible preimage in $C\times C$ if and only if there exists an irreducible smooth curve $D$ and morphisms from $D$ to $C$ and $B$ of degrees $d$ and $2$ respectively forming a diagram which does not reduce.
The impact of carbon and oxygen abundances on the metal-poor initial mass function
Creators: name: Sharda, Piyush
name: Amarsi, Anish M.
name: Grasha, Kathryn
name: Krumholz, Mark R.
name: Yong, David
name: Chiaki, Gen
name: Roy, Arpita
name: Nordlander, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Star formation models predict that the metal-poor initial mass function (IMF) can be substantially different from that observed in the metal-rich Milky Way. This changeover occurs because metal-poor gas clouds cool inefficiently due to their lower abundance of metals and dust. However, predictions for the metal-poor IMF to date rely on assuming Solar-scaled abundances, that is, [X/O] = 0 at all [O/H]. There is now growing evidence that elements such as C and O that dominate metal line cooling in the ISM do not follow Solar scaling at low metallicities. In this work, we extend models that predict the variation in the characteristic (or, the peak) IMF mass as a function of metallicity using [C/O] ratios derived from observations of metal-poor Galactic stars and of H II regions in dwarf galaxies. These data show [C/O] < 0 at sub-Solar [O/H], which leads to a substantially different metal-poor IMF in the metallicity range where C I and C II cooling dominate ISM thermodynamics, resulting in an increase in the characteristic mass by a factor as large as 7. An important consequence of this difference is a shift in the location of the transition from a top- to a bottom-heavy IMF upwards by 0.5 $-$ 1 dex in metallicity. Our findings indicate that the IMF is very sensitive to the assumptions around Solar-scaled ISM compositions in metal-poor systems (e.g., dwarf galaxies, the Galactic halo and metal-poor stars) that are a key focus of JWST.
description: 14 pages, 8 figures. Accepted by MNRAS
L'enseignement de la collaboration dans les jeux sportifs collectifs en éducation physique et sportive
Creators: name: Vassaux, Jessica
name: Vulliamoz, Pauline
Publisher: name: Unknown
Year: 0
Subjects: subject: collaboration
subject: coopération
subject: éducation physique
subject: groupe
subject: sports collectifs

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Simulation Analytics for Deeper Comparisons
Creators: name: Laidler, Graham
Publisher: name: Lancaster University
Year: 2023

description: Output analysis for stochastic simulation has traditionally focused on obtaining statistical summaries of time-averaged and replication-averaged performance measures. Although providing a useful overview of expected long-run results, this focus ignores the finer behaviour and dynamic interactions that characterise a stochastic system, motivating an opening for simulation analytics. Data analysis efforts directed towards the detailed event logs of simulation sample paths can extend the analytical toolkit of simulation beyond static summaries of long-run behaviour. This thesis contributes novel methodologies to the field of simulation analytics. Through a careful mining of sample path data and application of appropriate machine learning techniques, we unlock new opportunities for understanding and improving the performance of stochastic systems. Our first area of focus is on the real-time prediction of dynamic performance measures, and we demonstrate a k-nearest neighbours model on the multivariate state of a simulation. In conjunction with this, metric learning is employed to refine a system-specific distance measure that operates between simulation states. The involvement of metric learning is found not only to enhance prediction accuracy, but also to offer insight into the driving factors behind a system’s stochastic performance. Our main contribution within this approach is the adaptation of a metric learning formulation to accommodate the type of data that is typical of simulation sample paths. Secondly, we explore the continuous-time trajectories of simulation variables. Shapelets are found to identify the patterns that characterise and distinguish the trajectories of competing systems. Tailoring to the structure of discrete-event sample paths, we probe a deeper understanding and comparison of the dynamic behaviours of stochastic simulation.
spotrod: a semi-analytic model for transits of spotted stars
Creators: name: Béky, Bence
name: Kipping, David M.
name: Holman, Matthew J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Hubble Space Telescope (HST) and the Kepler space mission observed a large number of planetary transits showing anomalies due to starspot eclipses, with more such observations expected in the near future by the K2 mission and the Transiting Exoplanet Survey Satellite (TESS). To facilitate analysis of this phenomenon, we present spotrod, a model for planetary transits of stars with an arbitrary limb darkening law and a number of homogeneous, circular spots on their surface. A free, open source implementation written in C, ready to use in Python, is available for download. We analyze Kepler observations of the planetary host star HAT-P-11, and study the size and contrast of more than two hundred starspots. We find that the flux ratio of spots ranges at least from 0.6 to 0.9, corresponding to an effective temperature approximately 100 to 450 K lower than the stellar surface, although it is possible that some spots are darker than 0.5. The largest detected spots have a radius less than approximately 0.2 stellar radii.
description: 16 pages, 15 figures. Accepted for publication in MNRAS volume 442 issue 4
Entanglements of digital technologies and Indigenous language work in the Northern Territory
Creators: name: Bow, Cathy
Publisher: name: The Australian National University
Year: 2021
Subjects: Indigenous languages
Digital technologies

description: This thesis addresses the question of what happens when digital language resources are developed and become entangled with different types of language work in Indigenous languages of Australia's Northern Territory. It explores three specific sociotechnical assemblages, defined as heterogeneous sets of social and technical resources functioning together for various purposes. The types of language work that emerged were the role of language in practices of documentation, pedagogy and identity-making. The three projects under consideration respond to different motivations: the Living Archive of Aboriginal Languages is a digital archive of endangered literature in languages of the Northern Territory, motivated by a concern for the fate of materials produced in bilingual education programs in remote schools. The Digital Language Shell is a resource for developing and mobilising curricula in Indigenous languages and cultures, motivated by a need for a low-cost and low-tech template for sharing content under Indigenous authority. The Bininj Kunwok online course is a specific implementation of the Digital Language Shell, teaching an Indigenous language of West Arnhem land in a university context. Each project was created by the author working collaboratively with different teams, to support various types of language work. This PhD by publication offers a set of seven academic papers, each focusing on different aspects of the projects, and written for distinct audiences. The methods entailed iterative inquiry, as I reflected on my work as project manager in developing these digital resources, first addressing the technical and practical considerations, then through the lenses of various academic disciplines, and finally in a meta-analysis of the various heterogeneous elements that make up the research. The thesis emerges as an assemblage of heterogeneities – projects, papers, concepts, academic references, and auto-ethnographic stories – that is in itself a sociotechnical assemblage.
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The production of a top quark-antiquark pair in association with a W boson ($\mathrm{t\bar{t}}$W) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 138 fb$^{-1}$. Events with two or three leptons (electrons and muons) and additional jets are selected. In events with two leptons, a multiclass neural network is used to distinguish between the signal and background processes. Events with three leptons are categorized based on the number of jets and of jets originating from b quark hadronization, and the lepton charges. The inclusive $\mathrm{t\bar{t}}$W production cross section in the full phase space is measured to be 868 $\pm$ 40 (stat) $\pm$ 51 (syst) fb. The $\mathrm{t\bar{t}}$W$^+$ and $\mathrm{t\bar{t}}$W$^-$ cross sections are also measured as 553 $\pm$ 30 (stat) $\pm$ 30 (syst) and 343 $\pm$ 26 (stat) $\pm$ 25 (syst) fb, respectively, and the corresponding ratio of the two cross sections is found to be 1.61 $\pm$ 0.15 (stat) $^{+0.07}_{-0.05}$ (syst). The measured cross sections are larger than but consistent with the standard model predictions within two standard deviations, and represent the most precise measurement of these cross sections to date.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-21-011 (CMS Public Pages)
The Structure of the ${\cal N}=4$ Supersymmetric Linear $W_{\infty}[λ]$ Algebra
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For the vanishing deformation parameter $λ$, the full structure of the (anti)commutator relations in the ${\cal N}=4$ supersymmetric linear $W_{\infty}[λ=0]$ algebra is obtained for arbitrary weights $h_1$ and $h_2$ of the currents appearing on the left hand sides in these (anti)commutators. The $w_{1+\infty}$ algebra can be seen from this by taking the vanishing limit of other deformation parameter $q$ with the proper contractions of the currents. For the nonzero $λ$, the complete structure of the ${\cal N}=4$ supersymmetric linear $W_{\infty}[λ]$ algebra is determined for the arbitrary weight $h_1$ together with the constraint $h_1-3 \leq h_2 \leq h_1+1$. The additional structures on the right hand sides in the (anti)commutators, compared to the above $λ=0$ case, arise for the arbitrary weights $h_1$ and $h_2$ where the weight $h_2$ is outside of above region.
description: 79 pages; The previous section 5 is moved to the section 1 with some minor modifications and to appear in EPJC
The Quantum Orbifold Cohomology of Weighted Projective Spaces
Creators: name: Coates, Tom
name: Corti, Alessio
name: Lee, Yuan-Pin
name: Tseng, Hsian-Hua
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14N35 (Primary), 14A20, 53D45 (Secondary)

description: We calculate the small quantum orbifold cohomology of arbitrary weighted projective spaces. We generalize Givental's heuristic argument, which relates small quantum cohomology to S^1-equivariant Floer cohomology of loop space, to weighted projective spaces and use this to conjecture an explicit formula for the small J-function, a generating function for certain genus-zero Gromov-Witten invariants. We prove this conjecture using a method due to Bertram. This provides the first non-trivial example of a family of orbifolds of arbitrary dimension for which the small quantum orbifold cohomology is known. We also obtain formulas for the small J-functions of weighted projective complete intersections satisfying a combinatorial condition; this condition naturally singles out the class of orbifolds with terminal singularities.
description: LaTeX, 45 pages. Version 2: minor changes. Version 3: further typos corrected. Version 4: minor changes. Version 5: major changes to the exposition (especially in Section 3), title changed. Version 6: this is the final version; to appear in Acta Mathematica
title: Utilisation de films en cours de géographie
title: documentaires ou fictions ?
titleType: Subtitle
Creators: name: Zberg, Nicolas
Publisher: name: Unknown
Year: 0
Subjects: subject: Géographie
subject: Image
subject: Film
subject: Fiction
subject: Documentaire
subject: Représentation

description: Mémoire professionnel, Master en enseignement pour le degré secondaire I
Galaxy And Mass Assembly (GAMA): The dependence of the galaxy luminosity function on environment, redshift and colour
Creators: name: McNaught-Roberts, Tamsyn
name: Norberg, Peder
name: Baugh, Carlton
name: Lacey, Cedric
name: Loveday, J.
name: Peacock, J.
name: Baldry, I.
name: Bland-Hawthorn, J.
name: Brough, S.
name: Driver, Simon P.
name: Robotham, A. S. G.
name: Vazquez-Mata, J. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use 80922 galaxies in the Galaxy And Mass Assembly (GAMA) survey to measure the galaxy luminosity function (LF) in different environments over the redshift range 0.04
description: 23 pages, 17 figures. Accepted for publication in MNRAS
Caracterización mediante fractografía del mecanismo de falla por defectos en vidrio plano /
Creators: name: Anguiano Lizaola, Jorge Ignacio
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Vidrio de silicato||Tesis y disertaciones académicas||Vidrio||Propiedades ópticas||Tesis y disertaciones académicas||lemb
subject: QC375 A53 2022

description: En este trabajo de tesis se realizó una caracterización estructural de un vidrio de silicato con contenido de óxido de hierro (Fe2O3) para aplicación industrial con el objetivo de conocer sus propiedades físicas, químicas y su topografía para el análisis de defectos. Para su estudio se obtuvieron los cupones por fusión en un horno de gas, definiendo primero las condiciones de mezcla de aire, gas y temperatura para poder emular el proceso de fusión. Así mismo, en el tratamiento térmico se establecieron los parámetros de recocido para controlar los esfuerzos residuales y poder obtener una réplica para utilizarse en la caracterización. Para el análisis de los cupones se aplicaron las siguientes técnicas: 1) Polaroscopio, permitió analizar los esfuerzos residuales y correlacionarlo con la tendencia a la fractura. 2) Dilatometría, para realizar el estudio estructural, donde se evidenció la temperatura de transición vítrea, el punto de ablandamiento del material y el coeficiente de expansión térmica. 3) Fluorescencia de rayos X, para llevar cabo el análisis de composición química. 4) UV-visible, para medir las propiedades ópticas de transmitancia, la absorción y la concentración de Fe2O3. 5) Microscopía electrónica de barrido y espectroscopía de rayos-X por energía dispersa (EDX) para el análisis de topografía sobre superficies sometidas a una carga por identación. Se puede concluir que al llevar a cabo una fundición a baja escala para aplicar diferentes técnicas de caracterización avanzadas resulta en la optimización de recursos como tiempo y dinero, también se obtienen datos precisos de las propiedades físicas y químicas del vidrio de silicato los cuales son utilizados para el análisis de causas de defectos, dando un diagnóstico más acertado para resolver problemas en el proceso de fabricación evitando perdidas considerables.
Exploring uberholography
Creators: name: Ageev, Dmitry S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we study the holographic quantum error correcting code properties in different boundary fractal-like structures. We construct and explore different examples of the uberholographic bulk reconstruction corresponding to these structures in higher dimensions for Cantor-like sets, thermal states and $T\overline{T}$-deformed conformal field theories. We show how the growth of the system dimension emphasizes the role of the Cantor set, due to the special bound naturally arising in this context.
description: v1: 13 pages, 4 figures; v2: references added, typos corrected
Adaptive Recommendations with Bandit Feedback
Creators: name: Zhang, Mengyan
Publisher: name: The Australian National University
Year: 2023

description: Sequential decision-making under uncertainty is a fundamental challenge in machine learning. We consider multi-armed bandits problems, where the goal is to design a policy to recommend arms (options) sequentially where in each round only the rewards sampled from the selected arms are available. In this thesis, we study both theoretical and practical aspects of sequential decision-making with bandit feedback. From the theory aspect, we summarise the rewards using quantiles for risk-averse decision-making and selecting a local area of arm space with only aggregated feedback for a new aggregated regret. From the practical side, we study the best arms identification for biological sequence design in real-world applications and focus on the regret minimisation setting for large-scale news recommendations. There are three design choices one can make in bandit tasks, namely arms, objectives and rewards. The theoretical and practical contributions of this thesis cover and enrich the three design choices. We first consider the design choice of arm optimality and propose to use quantiles to summarise the reward distributions. This is under the task of best arms identification with a fixed budget for risk-averse decision-making. With new concentration inequalities for both order statistics and quantiles, we propose Quantile Successive Accepts and Rejects (Q-SAR) algorithm and provide an upper bound of the probability of finding the suboptimal arms. By assuming there is a reward function over the arm (feature) space and making assumptions about the smoothness of the reward function, we consider a real-world application in synthetic biology, where we design biological sequences in batches to optimise the corresponding protein expression level. By proposing a machine learning guided Design-Build-Test-Learn cycle and utilising the Gaussian process batch upper confidence bound algorithm, we improve the protein expression level by up to 35%. Motivated by the large arm space in applications such as large-scale recommender systems and biological sequence design, we design algorithms to explore arms hierarchically. Under the assumption of Gaussian process rewards, we consider a novel setting where only the aggregated feedback of a local area can be observed, instead of the reward of each selected choice. This setting is also useful when the individual feedback is not available due to for example privacy or hardware constraints. We propose a new algorithm called Gaussian Process Optimistic Optimisation (GPOO) to address this new setting and provided an upper bound of the aggregated regret. We then consider another type of hierarchical design for the application of recommendation systems, where we propose a two-stage topic-item recommendation framework for news recommendation. We further propose policies to utilise the neural representations and conduct large-scale experiments on a news recommendation dataset, which verifies the efficiency of the two-stage framework and our proposed policies.
Vers une pédagogie de la créativité en classe de langue
Creators: name: Besençon, Mélina
Publisher: name: Unknown
Year: 0
Subjects: subject: Pédagogie de la créativité
subject: Enseignement des langues
subject: Imagination créative
subject: Brainstorming
subject: Pensée divergente
subject: Ecriture créative

description: Notre mémoire s’intéresse à la pédagogie de la créativité et aux effets qu’elle peut avoir sur les performances des élèves dans une classe de langue. Notre travail contient tout d’abord une partie théorique définissant des concepts tels que créativité, création, imagination créative et pédagogie de la créativité. Notre deuxième partie expose la planification de la séquence d’enseignement que nous avons choisi de mettre en place. Cette séquence se déroule en trois phases. D’abord, nous avons demandé à nos élèves (7vsb) de rédiger un texte décrivant la chambre de leurs rêves. Nous avons ensuite organisé un brainstorming sur ce même thème. Cette méthode de travail a été choisie car elle nous est apparue comme un moyen efficace pour observer la pensée divergente des élèves. Finalement, nous avons demandé à nos élèves d’écrire à nouveau un texte sur le même sujet mais cette fois avec les résultats du brainstorming sous les yeux. Cette organisation en trois phases nous a permis ensuite d’analyser les deux textes que nos élèves avaient rédigés ainsi que les résultats du brainstorming en les comparant. Pour cette troisième partie, qui concerne les résultats de notre recherche, nous avons procédé de deux façons principales. D’abord, nous nous sommes intéressée à la forme des textes : nombre de lignes, nombre d’erreurs grammaticales ou orthographiques, genre d’erreurs et évolution de ces dernières. Ensuite, nous nous sommes concentrée sur le contenu des textes en dénombrant et en comparant les idées des élèves. Ainsi, nous avons pu observer que la mise en place d’un brainstorming avec la classe a, en effet, eu un impact sur les performances des élèves.
description: Mémoire professionnel, Master en enseignement pour le degré secondaire I
Increase of entanglement by local PT -symmetric operations
Creators: name: Chen, Shin-Liang
name: Chen, Guang-Yin
name: Chen, Yueh-Nan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement plays a central role in the field of quantum information science. It is well known that the degree of entanglement cannot be increased under local operations. Here, we show that the concurrence of a bipartite entangled state can be increased under the local PT -symmetric operation. This violates the property of entanglement monotonicity. We also use the Bell-CHSH and steering inequalities to explore this phenomenon.
description: 6 pages, 5 figures, to appear in PRA (2014)
Spectral stability of shock-fronted travelling waves under viscous relaxation
Creators: name: Lizarraga, Ian
name: Marangell, Robert
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 37C75, 34D15, 35B35

description: Reaction-nonlinear diffusion partial differential equations can exhibit shock-fronted travelling wave solutions. Prior work by Yi et. al. (2021) has demonstrated the existence of such waves for two classes of regularisations, including viscous relaxation. Their analysis uses geometric singular perturbation theory: for sufficiently small values of a parameter $\varepsilon > 0$ characterising the `strength' of the regularisation, the waves are constructed as perturbations of a singular heteroclinic orbit. Here we show rigorously that these waves are spectrally stable for the case of viscous relaxation. Our approach is to show that for sufficiently small $\varepsilon>0$, the `full' eigenvalue problem of the regularised system is controlled by a (reduced) slow eigenvalue problem defined for $\varepsilon = 0$. In the course of our proof, we examine the ways in which this geometric construction complements and differs from constructions of other reduced eigenvalue problems that are known in the wave stability literature.
description: V2. 70 pages, 10 figures (19 images)
State Estimation for Robotic Harvesting Applications
Creators: name: Kennedy, Gerard
Publisher: name: The Australian National University
Year: 2023

description: The global population is expected to pass 9 billion by 2050, requiring ongoing improvements in food production methods. Robotic harvesting offers part of the solution to this challenge, and research into the use of agricultural robots (AgBots) for harvesting horticultural crops has increased over the past several decades. While there has been significant progress in harvesting automation for many crops, robotic systems for crops that require selective harvesting remain far from mature. A key roadblock for successful implementation of such systems is the need for high-speed, high-accuracy perception pipelines. This thesis presents three projects which aim to develop techniques to enable implementation of fast, accurate robotic harvesting perception pipelines. These projects utilise state estimation techniques to solve common robotic harvesting perception problems. The initial problem involves detecting, localising, and tracking green asparagus spears with the aim of selectively harvesting this crop. For this task the state is the location and height of each asparagus spear. As part of this work I also present a design for a prototype robotic platform for harvesting green asparagus. The second application presented in this thesis is object pose estimation and refinement from a single RGB image. Object pose estimation is a key technique in many robotic harvesting perception systems, where it is used to determine the pose of the target crop. For this application a deep learning framework, titled the Innovation CNN, is developed. The Innovation CNN receives an image and an initial state estimate, and computes the gradient from the estimated state to the true state. The result is applied iteratively in a Stochastic Gradient Descent framework to refine initial pose estimates. The third application presented in this thesis is depth estimation and refinement from a single RGB image. Depth estimation is regularly used in robotic harvesting applications as a means of determining crop distance/height, or as an intermediate step in computing a 3D reconstruction. The Innovation CNN is also applied to this problem, again using Stochastic Gradient Descent to refine the initial depth estimate.
Bulletin of the Northamptonshire Federation of Archaeological Societies
Creators: name: Brown
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 2, 1-43
description: Comprises an introduction to the Federation, 1-3, a roundup of recent fieldwork in the county by period, 5-34, a list of Ancient Monuments in the county, 35-40, and a note on urban growth, mineral exploitation and archaeological fieldwork, by A E Brown, 41-43.
Coloron-assisted Leptoquarks at the LHC
Creators: name: Bai, Yang
name: Berger, Joshua
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recent searches for a first-generation leptoquark by the CMS collaboration have shown around 2.5 sigma deviations from Standard Model predictions in both the eejj and e nu jj channels. Furthermore, the eejj invariant mass distribution has another 2.8 sigma excess from the CMS right-handed W plus heavy neutrino search. We point out that additional leptoquark production from a heavy coloron decay can provide a good explanation for all three excesses. The coloron has a mass around 2.1 TeV and the leptoquark mass can vary from 550 GeV to 650 GeV. A key prediction of this model is an edge in the total m_T distribution of e nu jj events at around 2.1 TeV.
description: 5 pages, 4 figures
Représentations d'élèves vis-à-vis des travaux pratiques de dissection au secondaire 1
Creators: name: Basterra, Laetitia
name: Fumeaux, Pierre
Publisher: name: Unknown
Year: 0
Subjects: subject: dissection
subject: alternatives à la dissection
subject: ressentis d’élèves
subject: facteurs influençant positivement ou négativement la dissection

description: Les travaux pratiques font partie intégrante de l’enseignement des sciences expérimentales au secondaire. Un élève qui expérimente se sent souvent plus responsable et l’expérimentation permet d’éveiller et maintenir la curiosité des élèves. Mais la dissection n’est pas un travail pratique comme les autres. L’utilisation d’organes ou de tissus issus d’un animal vivant lui confère un statut particulier. Il n’est pas rare de constaterde vives réactions positives ou négatives à l’annonce d’un travail pratique de dissection au collège. Les plans d’études actuels ne font pas mention explicitement de l’utilisation de la dissection au collège, mais c’est une pratique très répandue. Dans cette étude,nous nous sommes demandés quels pouvaient être les sentiments des élèves du secondaire 1 vis-à-vis de la dissection. Il en ressort que la curiositéet l’excitationsont les deux sentiments les plus répandus avant une dissection. Des sentiments comme le dégoût, le stresset les nausées ne sont pas les plus répandus, bien que certains élèves y aient été confrontés. Nous nous sommes ensuite demandé quelles pouvaient être les sources de motivation des élèves. Nous avons trouvé que le fait de voir en vrai la théorie étudiée est une des motivations principales. Nous avons aussi constaté que le fait de pouvoir toucher ou sentir l’organe étudié était une source de motivation pour les garçons, mais pas pour les filles. Nous avons ensuite étudié quels facteurs pouvaient influencer positivement ou négativement une dissection. Un déroulement clair et explicite figurait parmi les conditions qui pouvaient influencer positivement une dissection. Nous avons aussi interrogé les élèves quant à leur appréciation de ces travaux pratiqueset l’utilisation de méthodes alternatives. Plus de 78% des élèvesinterrogés disent apprécier ces travaux pratiques et 90% ne verraient pas d’alternatives efficaces.
description: Mémoire professionnel, Master en enseignement pour le degré secondaire I
Bulletin of the Northamptonshire Federation of Archaeological Societies
Creators: name: Brown
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 3, 1-38
description: Comprises a roundup of fieldwork in south and central Northamptonshire, by D Smith, 1-3, and a roundup of recent fieldwork in the county by period, 4-37.
Constraining effective neutrino species with bispectrum of large scale structures
Creators: name: Shi, Yanlong
name: Heinrich, Chen
name: Doré, Olivier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Relativistic and free-streaming particles like neutrinos leave imprints in large scale structures (LSS), providing probes of the effective number of neutrino species $N_{\rm eff}$. In this paper, we use the Fisher formalism to forecast $N_{\rm eff}$ constraints from the bispectrum (B) of LSS for current and future galaxy redshift surveys, specifically using information from the baryon acoustic oscillations (BAOs). Modeling the galaxy bispectrum at the tree-level, we find that adding the bispectrum constraints to current CMB constraints from Planck can improve upon the Planck-only constraints on $N_{\rm eff}$ by about 10\% -- 40\% depending on the survey. Compared to the Planck + power spectrum (P) constraints previously explored in the literature, using Planck+P+B provides a further improvement of about 5\% -- 30\%. Besides using BAO wiggles alone, we also explore using the total information which includes both the wiggles and the broadband information (which is subject to systematics challenges), generally yielding better results. Finally, we exploit the interference feature of the BAOs in the bispectrum to select a subset of triangles with the most information on $N_{\rm eff}$. This allows for the reduction of computational cost while keeping most of the information, as well as for circumventing some of the shortcomings of applying directly to the bispectrum the current wiggle extraction algorithm valid for the power spectrum. In sum, our study validates that the current Planck constraint on $N_{\rm eff}$ can be significantly improved with the aid of galaxy surveys before the next-generation CMB experiments like CMB-Stage 4.
description: Revised version matching the publication
Bulletin of the Northamptonshire Federation of Archaeological Societies
Creators: name: Brown
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 4, 1-64
description: Comprises a roundup of recent fieldwork in the county by period, 2-34, a summary of fieldwork in north eastern Northamptonshire by Dennis Jackson, 35-48, a review of Potterspury-type medieval pottery by D C Mynard, 49-55, and a gazetteer of prehistoric and Roman sites in the Welland Valley, Northamptonshire by A E Brown, 56-64