cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric, spectral and asymptotic properties of averaged products of projections in Banach spaces
Creators: name: Badea, Catalin
name: Lyubich, Yuri I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A05 (Primary) 46B20, 47A10 (Secondary)

description: According to the von Neumann-Halperin and Lapidus theorems, in a Hilbert space the iterates of products or, respectively, of convex combinations of orthoprojections are strongly convergent. We extend these results to the iterates of convex combinations of products of some projections in a complex Banach space. The latter is assumed uniformly convex or uniformly smooth for the orthoprojections, or reflexive for more special projections, in particular, for the hermitian ones. In all cases the proof of convergence is based on a known criterion in terms of the boundary spectrum.
description: the new version incorporates the remarks of the referee ; to appear in Studia Math
title: Moulage du bas-relief du combat des anges fidèles et des anges rebelles, de la cathédrale Notre-Dame de Paris
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Bas-relief en forme d'ogive. Feuillages. Dans un cadre  un ange auréolé à gauche  avec épée et bouclier  en combat un autre tombé  à droite  sans ailes. Ils figurent le combat des anges fidèles et des anges rebelles. Fond étoilé. - Note : Créateur  Atelier de moulage Pouzadoux  Musée de sculpture comparée. Estampille  "MUSEE DE SCULPTURE COMPAREE / POUZADOUX / MOULEUR / AU TROCADERO" Dépoussiérage en 2009-2010
Drag and thrust effects of Viscoelastic fluids
Creators: name: Goyal, Gaurav
Publisher: name: University of British Columbia
Year: 2017

description: Viscoelastic fluids are non-Newtonian fluids exhibiting both viscous and elastic properties. Many fluids of practical importance (polymers, surfactants, mucus, shampoos etc.) display viscoelastic effects to different degrees under a wide range of flow conditions and thus, these fluids present a variety of problems. In this work, we study two problems at very different flow conditions in viscoelastic fluids: a) the effect of swimming gait on bio-locomotion and b) characterizing the drag reducing fluids used for gravel-packing operations in the petroleum industry. For the first problem, we give formulas for the swimming of simplified two-dimensional bodies at low Reynolds numbers in complex fluids using the reciprocal theorem. By way of these formulas, we calculate the swimming velocity due to small-amplitude deformations on the simplest of these bodies, a two-dimensional sheet, to explore general conditions on the swimming gait under which the sheet may move faster, or slower, in a viscoelastic fluid compared to a Newtonian fluid. We show that in general, for small amplitude deformations, a speed increase can only be realized by multiple deformation modes in contrast to slip flows. Additionally, we show that a change in swimming speed is directly due to a change in thrust generated by the swimmer. Later, we work with viscoelastic additives (xanthan and a zwitterionic viscoelastic surfactant, VES), widely used as drag reducers for gravel-packing applications. While the behavior of xanthan is well characterized in the literature, much less is known about the VES characteristics, despite widespread use. We performed a number of rheological tests and flow-loop experiments on VES solutions to understand the structural characteristics to make better process predictions. Unlike xanthan, which displays typical viscoelastic liquid characteristics, VES displays elastic gel-like behaviour. The gel-like behaviour suggests long and relatively unbreakable chain lengths of the wormlike micelles in the VES at room temperature leading to gelation by entanglement. Also, a shear-thickening behaviour of VES samples at higher shear rates is observed, possibly as a result of shear-induced structures. Finally, we present a novel representation scheme to depict the flow-loop results relating the rheological characterization while observing drag reduction.
LTER Shita, Israel, Biodiversity Scorpions, 2015-2020
Creators: name: Segev, Nitzan
Publisher: name: https://b2share.eudat.eu
Year: 2020

description: Night visual observations using UV torches, in moonless or first quarter moon nights. The observations are conducted by 2-3 observers, walking along three belt transects,20-30 minutes for each transect. The data is collected using ArcGIS Survey123 app.
title: Moulage du bas-relief de la Vierge sage de la cathédrale de Sens
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Bas-relief de la Vierge sage  drapée et voilée  tenant en mains le vase enflammé  et placée sous une arcature ogivale trilobée supportée par deux colonnettes. Manque le visage. Moulage d'un original en pierre. - Note : Restauré en 2009-2010 Atelier de moulages Pouzadoux  Musée de sculpture comparée. Estampille  "MUSEE DE SCULPTURE COMPAREE / POUZADOUX / MOULEUR / AU TROCADERO"
Heat conduction in relativistic neutral gases revisited
Creators: name: Garcia-Perciante, A. L.
name: Mendez, A. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The kinetic theory of dilute gases to first order in the gradients yields linear relations between forces and fluxes. The heat flux for the relativistic gas has been shown to be related not only to the temperature gradient but also to the density gradient in the representation where number density, temperature and hydrodynamic velocity are the independent state variables. In this work we show the calculation of the corresponding transport coefficients from the full Boltzmann equation and compare the magnitude of the relativistic correction.
Shifted forces in molecular dynamics
Creators: name: Toxvaerd, Søren
name: Dyre, Jeppe C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Simulations involving the Lennard-Jones potential usually employ a cut-off at $r=2.5σ$. This paper investigates the possibility of reducing the cut-off. Two different cut-off implementations are compared, the standard shifted potential cut-off and the less commonly used shifted forces cut-off. The first has correct forces below the cut-off, whereas the shifted forces cut-off modifies Newton's equations at all distances. The latter is nevertheless superior; we find that for most purposes realistic simulations may be obtained using a shifted-forces cut-off at $r=1.5σ$, even though the pair force is here 30 times larger than at $r=2.5σ$.
Measuring the W-Boson mass at a hadron collider: a study of phase-space singularity methods
Creators: name: De Rújula, A.
name: Galindo, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The traditional method to measure the W-Boson mass at a hadron collider (more precisely, its ratio to the Z-mass) utilizes the distributions of three variables in events where the W decays into an electron or a muon: the charged-lepton transverse momentum, the missing transverse energy and the transverse mass of the lepton pair. We study the putative advantages of the additional measurement of a fourth variable: an improved phase-space singularity mass. This variable is statistically optimal, and simultaneously exploits the longitudinal- and transverse-momentum distributions of the charged lepton. Though the process we discuss is one of the simplest realistic ones involving just one unobservable particle, it is fairly non-trivial and constitutes a good "training" example for the scrutiny of phenomena involving invisible objects. Our graphical analysis of the phase space is akin to that of a Dalitz plot, extended to such processes.
description: 11 pages. 9 figures. Version to be published in JHEP
LHC Charge Asymmetry as Constraint on Models for the Tevatron Top Anomaly
Creators: name: Craig, Nathaniel
name: Kilic, Can
name: Strassler, Matthew J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The forward-backward asymmetry $A_{FB}^{t\bar t}$ in top quark production at the Tevatron has been observed to be anomalously large by both CDF and D0. It has been suggested that a model with a $W'$ coupling to $td$ and $ub$ might explain this anomaly, and other anomalies in $B$ mesons. Single-top-quark production in this model is large, and arguably in conflict with Tevatron measurements. However the model might still be viable if $A_{FB}^{t\bar t}$ is somewhat smaller than its current measured central value. We show that even with smaller couplings, the model can be discovered (or strongly excluded) at the LHC using the 2010 data sets. We find that a suitable charge-asymmetry measurement is a powerful tool that can be used to constrain this and other sources of anomalous single-top production, and perhaps other new high-energy charge-asymmetric processes.
description: 25 pages, 4 figures, note added
title: Moulage d'un haut-relief d'aigle romain
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Aigle romain aux ailes déployées  au milieu d'une couronne ceinte d'un ruban. Moulage d'un original en marbre.
title: Moulage d'un tondo monumental d'Hadrien de l'arc de Constantin à Rome : départ à la chasse
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Le moulage représente un départ à la chasse. Quatre personnages et deux chevaux sortent d'un porche à droite. Arbre à gauche.
The role of Pax6 and Wls in rhombic lip compartmentation and cerebellar development
Creators: name: Yeung, Joanna
Publisher: name: University of British Columbia
Year: 2017

description: The transcription factor Pax6 is prominently expressed in the glutamatergic neurons during cerebellar development. When mutated, the Pax6-null Sey cerebellar granule cells (GC) are disorganized and foliation is disrupted. To elucidate the gene network regulated by Pax6 in cerebellar development, the Sey mutant transcriptome was analyzed and differentially expressed genes were identified. In this thesis, I examine some of these genes and their role in cerebellar development, as well as the relationship of these molecules with Pax6. Wntless (Wls) is up-regulated in the Sey cerebellum. Wls expression is restricted to the interior face of the rhombic lip (iRL) in normal cerebellar development. Whereas in the Sey cerebellum, Wls-expressing cells expand into the EGL, indicating that Pax6 normally suppresses Wls expression. Furthermore, examination of Wls and other rhombic lip (RL) markers in the wildtype embryos demonstrates that the RL is dynamically demarcated into four molecularly distinct compartments. Conversely, Tbr1 and Tbr2 are down-regulated in the Sey cerebellum. These are cell markers of cerebellar nuclei (CN) neurons and unipolar brush cells (UBCs), respectively. The absence of CN neurons and UBCs in the Sey mutant are revealed using standard immunohistochemistry and Nissl staining. Cell death analysis demonstrates that there is enhanced cell death in Sey mutant CN neuron progenitors, GCs and UBCs. Cell proliferation analysis also shows a reduction in the Sey RL progenitor pool during the genesis of UBCs and GCs. To elucidate the requirement of Wls in cerebellar development, I examine the conditional Wls knockout (Wls-cKO) in which Wls is ablated in the RL during mid-gestation. Ectopic Pax6-expressing cells are found in the Wls-cKO RL indicating that Wls normally suppresses Pax6. The Wls-cKO cerebellum displays a smaller vermis and foliation defects. Granule cells are disorganized and UBCs are missing from the mutant cerebellum. The lack of Wls also affected cells of the VZ-lineage such as Purkinje cells and interneurons. This thesis provides novel insights into the molecular network underpinning cerebellar development, in particular the requirement of Pax6 and Wls. This work also reveals the spatial compartments in the developing RL that are defined by Pax6, Wls and other molecular markers.
title: Moulage d'un tondo monumental d'Hadrien de l'arc de Constantin à Rome : sacrifice à Diane
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Le moulage représente un sacrifice à Diane. Quatre personnage devant un autel avec la statue  deux arbres  une tête de sanglier en haut de l'arbre
Post-common-envelope binaries from SDSS. IX: Constraining the common-envelope efficiency
Creators: name: Zorotovic, M.
name: Schreiber, M. R.
name: Gänsicke, B. T.
name: Gómez-Morán, A. Nebot
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Reconstructing the evolution of post-common-envelope binaries (PCEBs) can constrain current prescriptions of common-envelope (CE) evolution. Analyzing a new sample of PCEBs we derive constraints on one of the most important parameters in the field of close compact binary formation, i.e. the CE efficiency alpha. After reconstructing the post-CE evolution and based on fits to stellar evolution calculations as well as a parametrized energy equation for CE evolution that incorporates realistic approximations of the binding energy parameter lambda, we determine the possible evolutionary histories of the observed PCEBs. We also reconstruct CE evolution replacing the classical energy equation with a scaled angular momentum equation and compare the results obtained with both algorithms. We find that all PCEBs in our sample can be reconstructed with the energy equation if the internal energy of the envelope is included. Although most individual systems have solutions for a broad range of values for alpha, only for alpha=0.2-0.3 do we find simultaneous solutions for all PCEBs in our sample. If we adjust alpha to this range of values, the values of the angular momentum parameter gamma cluster in a small range of values. In contrast if we fix gamma to a small range of values that allows us to reconstruct all our systems, the possible ranges of values for alpha remains broad for individual systems. The classical parametrized energy equation seems to be an appropriate prescription of CE evolution and turns out to constrain the outcome of the CE evolution much more than the alternative angular momentum equation. If there is a universal value of the CE efficiency, it should be in the range of alpha=0.2-0.3. We do not find any indications for a dependence of alpha on the mass of the secondary star or the final orbital period.
description: 15 pages, 6 figures
title: Moulage de bas-relief de sarcophage romain avec médaillon
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Il s'agit d'un tirage en plâtre d'une face de sarcophage romain.  Au centre  dans un médaillon  on voit la défunte en effigie. Ce médaillon est tenu par deux putti ailés. Au-dessous  deux petits personnages tiennent des coqs. Autour d'eux  neuf autres personnages enfantins sont représentés en faisant des sacrifices sur deux autels.  L'un des exemples des plus célèbres de ce type de représentation est la fontaine du sarcophage  dans la place du Colosseum à Rome.  Un autre exemple de sarcophage à médaillon est consérvé à Saint Petersbourg.
Small Amplitude Forced Fluid Dynamics from Gravity at T = 0
Creators: name: Oh, Jae-Hyuk
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The usual derivative expansion of gravity duals of charged fluid dynamics is known to break down in the zero temperature limit. In this case, the fluid-gravity duality is not understood precisely. We explore this problem for a zero temperature charged fluid driven by a low frequency, small amplitude and spatially homogeneous external force. In the gravity dual, this corresponds to time dependent boundary value of the dilaton. We calculate the bulk solution for the dilaton and the leading backreaction to the metric and the gauge fields using the modified low frequency expansion of [11]. The resulting solutions are regular everywhere, establishing fluid-gravity duality to this order.
description: 31 pages, Added comments in Sec.2 and Sec.4, Corrected typos
title: Moulage 109
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Inventaire Morinière 2017 : nº109 Il s'agit d'un tirage en plâtre d'une face de sarcophage romain. La scène représente une procession des dieux.
Chiral restoration at finite T under the magnetic field with the meson-loop corrections
Creators: name: Nam, Seung-il
name: Kao, Chung-Wen
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the (partial) chiral restoration at finite temperature (T) under the strong external magnetic field B_0 of the SU(2) light-flavor QCD matter. To this end, we employ the instanton-liquid QCD vacuum configuration accompanied with the linear Schwinger method for inducing the magnetic field. The Harrington-Shepard caloron solution is used to modify the instanton parameters, i.e. the average instanton size (rho) and inter-instanton distance (R), as functions of T. In addition, we include the meson-loop corrections (MLC) as the large-N_c corrections because they are critical for reproducing the universal chiral restoration pattern. We present the numerical results for the constituent-quark mass as well as chiral condensate which signal the spontaneous breakdown of chiral-symmetry SBCS, as functions of T and B_0. From our results we observe that the strengths of those chiral order parameters are enhanced with respect to B_0 due to the magnetic catalysis effect. We also find that there appears a region where the u and d-quark constituent masses coincide with each other at eB_0 = (7 ~ 9) m^2_pi, even in the presence of the explicit isospin breaking. The critical T for the chiral restoration T_c tends to shift to the higher temperature in the presence of the B_0 for the chiral limit but keeps almost stationary for the physical quark mass case. We also compute the pion weak-decay constant F_pi and pion mass m_pi below T_c, varying the strength of the magnetic field, showing correct partial chiral restoration behaviors. Besides we find that the changes for the F_pi and m_pi due to the magnetic field is relatively small, in comparison to those caused by the finite T effect.
description: 15 pages, 14 figures, accepted for publication in Phys.Rev.D
title: Moulage 107
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Inventaire Morinière 2017 Tirage en plâtre d'un panneau de sarcophage romain  probablement du IIe siècle apr. J.-C. La scène représente l'Enlèvement de Proserpine  auquel s'oppose Athéna.	 Rapelle le détail d'un sarcophage romain du IIe siècle apr. J.-C. conservé à l'Ermitage de Saint Petersbourg avec la même iconographie (mais il ne semble pas l'original du moulage).  Rapelle le détail d'un autre sarcophage romain  toujours du IIe siècle apr. J.-C.  conservé à Florence (Offices)  avec la même iconographie.
Low-temperature quantum fluctuations in overdamped ratchets
Creators: name: Maier, Stefan A.
name: Ankerhold, Joachim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: At low temperatures and strong friction the time evolution of the density distribution in position follows a quantum Smoluchowski equation. Recently, also higher-order contributions of quantum fluctuations to drift and diffusion coefficients have been systematically derived. As a non-trivial situation to reveal the impact of subleading quantum corrections and to demonstrate convergence properties of the perturbation series, directed transport in ratchets is studied. It is shown that the perturbation series typically has a non-monotonous behavior. Depending on symmetry properties higher order contributions may even compensate current reversals induced by leading quantum fluctuations. This analysis demonstrates how to consistently treat the dynamics of overdamped quantum systems at low temperatures also in numerical applications.
description: 5 pages, 3 figures
title: Moulage d'haut-relief provenant de la porte nord de l'Érechthéion d'Athènes
Creators: name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Il s'agit d'un tirage en plâtre d'un fragment de la décoration de la porte nord de l'Érechthéion d'Athènes  aujourd'hui conservé in situ. - Note : Inscription A168 au marqueur noir
Probing the high momentum component of the deuteron at high Q^2
Creators: name: Boeglin, W. U.
name: Collaboration, Hall A
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The d(e,e'p) cross section at a momentum transfer of 3.5 (GeV/c)^2 was measured over a kinematical range that made it possible to study this reaction for a set of fixed missing momenta as a function of the neutron recoil angle theta_nq and to extract missing momentum distributions for fixed values of theta_nq up to 0.55 GeV/c. In the region of 35 (deg) <= theta_nq <= 45 (deg) recent calculations, which predict that final state interactions are small, agree reasonably well with the experimental data. Therefore these experimental reduced cross sections provide direct access to the high momentum component of the deuteron momentum distribution in exclusive deuteron electro-disintegration.
description: 5 pages, 2 figures
Linear stability analysis of ice growth under supercooled water film driven by a laminar airflow
Creators: name: Ueno, K.
name: Farzaneh, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We propose a theoretical model for ice growth under a wind-driven supercooled water film. The thickness and surface velocity of the water layer are variable by changing the air stream velocity. For a given water supply rate, linear stability analysis is carried out to study the morphological instability of the ice-water interface. In this model, water and air boundary layers are simultaneously disturbed due to the change in ice shape, and the effect of the interaction between air and water flows on the growth condition of the ice-water interface disturbance is taken into account. It is shown that as wind speed increases, the amplification rate of the disturbance is significantly affected by variable stresses exerted on the water-air interface by the air flow as well as restoring forces due to gravity and surface tension. We predict that an ice pattern of a centimeter scale in wavelength appears and the wavelength decreases as wind speed increases, and that the ice pattern moves in the direction opposite to the water flow. The effect of the air stress disturbance on the heat transfer coefficient at the water-air interface is also investigated for various wind speeds.
description: 40 pages, 9 figures, 2 tables
Fast Scramblers Of Small Size
Creators: name: Barbon, J. L. F.
name: Magan, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate various geometrical aspects of the notion of `optical depth' in the thermal atmosphere of black hole horizons. Optical depth has been proposed as a measure of fast-crambling times in such black hole systems, and the associated optical metric suggests that classical chaos plays a leading role in the actual scrambling mechanism. We study the behavior of the optical depth with the size of the system and find that AdS/CFT phase transitions with topology change occur naturally as the scrambler becomes smaller than its thermal length. In the context of detailed AdS/CFT models based on D-branes, T-duality implies that small scramblers are described in terms of matrix quantum mechanics.
description: 14 pages, 3 figures. Added references
title: Moulage du bas-relief aux anges, monument funéraire de Raoul de Lannoy
Creators: name: Pierre Moyat
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022

description: Il s'agit d'un moulage d'un bas-relief représentant des anges
Fully gapped superconductivity in SrNi$_2$P$_2$
Creators: name: Kurita, Nobuyuki
name: Ronning, Filip
name: Miclea, Corneliu F.
name: Bauer, Eric D.
name: Gofryk, Krzysztof
name: Thompson, J. D.
name: Movshovich, Roman
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigated the superconducting gap structure of SrNi$_2$P$_{2}$ ($T_c$=1.4 K) via low-temperature magneto-thermal conductivity $κ(T,H)$ measurements. Zero field thermal conductivity $κ$ decreases exponentially $κ\propto$ exp($-aT_c/T$) with $a$=1.5, in accord with the BCS theory, and rolls over to a phonon-like $κ\propto T^3$ behavior at low temperature, similar to a number of conventional s-wave superconductors. In addition, we observed a "concave" field dependence of the residual linear term $κ_0(H)/T$. These facts strongly rule out the presence of nodes in the superconducting energy gap of SrNi$_2$P$_{2}$. Together with a fully gapped Fermi surface in the superconducting state of BaNi$_2$As$_{2}$ ($T_c$=0.6-0.7 K), demonstrated in our recent work, these results lead us to postulate that fully gapped superconductivity is a universal feature of Ni-based pnictide superconductors.
description: 7 figures, 5 figures, accepted for publication in Physical Review B
The case for design-mediated innovation pedagogy
Creators: name: Beausoleil, Angèle Marie
Publisher: name: University of British Columbia
Year: 2017

description: Innovation is a key driver for growth and is considered critical to a sustainable economy. Across the globe, governments and industries continue to invest significantly in innovation-development activities with mixed results. In early 2016, the government of Canada published its innovation agenda in response to its mediocre innovation performance. It identified the lack of innovation-ready citizens as one critical action area and the need for Canadians to develop an innovative mindset. This dissertation investigates how a design method could improve understanding of the innovation process and increase individual and organizational innovative capacity. An interdisciplinary literature review provides insights into how the innovation process happens and helps define the competencies associated with innovative capacity or individual innovativeness. Findings from a document analysis and two action-research studies are translated into a visualization of the innovation process and a competencies framework for both classrooms and organizations. A design-mediated innovation pedagogy is proposed to develop key innovativeness competencies commonly associated with innovators. This pedagogical model suggests a shift from entrepreneurship to innovatorship education. My research contributes knowledge in understanding the ways in which individuals and their organizations learn to think, act and work in innovative ways. It offers implications for the application and future research of design-based innovation pedagogy models inside Canadian classrooms, business studios and global organizations.
Emergence of scale-free leadership structure in social recommender systems
Creators: name: Zhou, Tao
name: Medo, Matus
name: Cimini, Giulio
name: Zhang, Zi-Ke
name: Zhang, Yi-Cheng
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The study of the organization of social networks is important for understanding of opinion formation, rumor spreading, and the emergence of trends and fashion. This paper reports empirical analysis of networks extracted from four leading sites with social functionality (Delicious, Flickr, Twitter and YouTube) and shows that they all display a scale-free leadership structure. To reproduce this feature, we propose an adaptive network model driven by social recommending. Artificial agent-based simulations of this model highlight a "good get richer" mechanism where users with broad interests and good judgments are likely to become popular leaders for the others. Simulations also indicate that the studied social recommendation mechanism can gradually improve the user experience by adapting to tastes of its users. Finally we outline implications for real online resource-sharing systems.
Molecular force fields with gradient-domain machine learning (GDML): Comparison and synergies with classical force fields
Creators: name: Sauceda, Huziel E.
name: Gastegger, Michael
name: Chmiela, Stefan
name: Müller, Klaus-Robert
name: Tkatchenko, Alexandre
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 541 Physikalische Chemie
subject: 004 Datenverarbeitung; Informatik
subject: machine learning
subject: ML-FF
subject: molecular mechanics
subject: MM-FF
subject: force fields

description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. Chem. Phys. 153, 124109 (2020) and may be found at https://doi.org/10.1063/5.0023005.
description: Modern machine learning force fields (ML-FF) are able to yield energy and force predictions at the accuracy of high-level ab initio methods, but at a much lower computational cost. On the other hand, classical molecular mechanics force fields (MM-FF) employ fixed functional forms and tend to be less accurate, but considerably faster and transferable between molecules of the same class. In this work, we investigate how both approaches can complement each other. We contrast the ability of ML-FF for reconstructing dynamic and thermodynamic observables to MM-FFs in order to gain a qualitative understanding of the differences between the two approaches. This analysis enables us to modify the generalized AMBER force field by reparametrizing short-range and bonded interactions with more expressive terms to make them more accurate, without sacrificing the key properties that make MM-FFs so successful.
description: Modern machine learning force fields (ML-FF) are able to yield energy and force predictions at the accuracy of high-level ab initio methods, but at a much lower computational cost. On the other hand, classical molecular mechanics force fields (MM-FF) employ fixed functional forms and tend to be less accurate, but considerably faster and transferable between molecules of the same class. In this work, we investigate how both approaches can complement each other. We contrast the ability of ML-FF for reconstructing dynamic and thermodynamic observables to MM-FFs in order to gain a qualitative understanding of the differences between the two approaches. This analysis enables us to modify the generalized AMBER force field by reparametrizing short-range and bonded interactions with more expressive terms to make them more accurate, without sacrificing the key properties that make MM-FFs so successful.
Magnetic expansion of Nekrasov theory: the SU(2) pure gauge theory
Creators: name: He, Wei
name: Miao, Yan-Gang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is recently claimed by Nekrasov and Shatashvili that the $\mathcal {N}=2$ gauge theories in the $Ω$ background with $ε_1=\hbar, ε_2=0$ are related to the quantization of certain algebraic integrable systems. We study the special case of SU(2) pure gauge theory, the corresponding integrable model is the A$_1$ Toda model, which reduces to the sine-Gordon quantum mechanics problem. The quantum effects can be expressed as the WKB series written analytically in terms of hypergeometric functions. We obtain the magnetic and dyonic expansions of the Nekrasov theory by studying the property of hypergeometric functions in the magnetic and dyonic regions on the moduli space. We also discuss the relation between the electric-magnetic duality of gauge theory and the action-action duality of the integrable system.
description: 17 pages, submitted to PRD; v2, typos corrected, references added; v3, published version
Neutrino Quasielastic Scattering on Nuclear Targets: Parametrizing Transverse Enhancement (Meson Exchange Currents)
Creators: name: Bodek, A.
name: Budd, H. S.
name: Christy, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a parametrization of the observed enhancement in the transverse electron quasielastic (QE) response function for nucleons bound in carbon as a function of the square of the four momentum transfer ($Q^2$) in terms of a correction to the magnetic form factors of bound nucleons. The parametrization should also be applicable to the transverse cross section in neutrino scattering. If the transverse enhancement originates from meson exchange currents (MEC), then it is theoretically expected that any enhancement in the longitudinal or axial contributions is small. We present the predictions of the "Transverse Enhancement" model (which is based on electron scattering data only) for the $ν_μ, \barν_μ$ differential and total QE cross sections for nucleons bound in carbon. The $Q^2$ dependence of the transverse enhancement is observed to resolve much of the long standing discrepancy in the QE total cross sections and differential distributions between low energy and high energy neutrino experiments on nuclear targets.
description: Revised Version- July 21, 2011: 17 pages, 20 Figures. To be published in Eur. Phys. J. C
Compact smallest eigenvalue expressions in Wishart-Laguerre ensembles with or without fixed-trace
Creators: name: Akemann, Gernot
name: Vivo, Pierpaolo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The degree of entanglement of random pure states in bipartite quantum systems can be estimated from the distribution of the extreme Schmidt eigenvalues. For a bipartition of size M\geq N, these are distributed according to a Wishart-Laguerre ensemble (WL) of random matrices of size N x M, with a fixed-trace constraint. We first compute the distribution and moments of the smallest eigenvalue in the fixed trace orthogonal WL ensemble for arbitrary M\geq N. Our method is based on a Laplace inversion of the recursive results for the corresponding orthogonal WL ensemble by Edelman. Explicit examples are given for fixed N and M, generalizing and simplifying earlier results. In the microscopic large-N limit with M-N fixed, the orthogonal and unitary WL distributions exhibit universality after a suitable rescaling and are therefore independent of the constraint. We prove that very recent results given in terms of hypergeometric functions of matrix argument are equivalent to more explicit expressions in terms of a Pfaffian or determinant of Bessel functions. While the latter were mostly known from the random matrix literature on the QCD Dirac operator spectrum, we also derive some new results in the orthogonal symmetry class.
description: 25 pag., 4 fig - minor changes, typos fixed. To appear in JSTAT
title: Cryptic species in a well-known habitat
title: applying taxonomics to the amphipod genus Epimeria (Crustacea, Peracarida)
titleType: Subtitle
Creators: name: Beermann, Jan
name: Westbury, Michael V.
name: Hofreiter, Michael
name: Hilgers, Leon
name: Deister, Fabian
name: Neumann, Hermann
name: Raupach, Michael J.
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 500 Naturwissenschaften und Mathematik
subject: 600 Technik, Technologie

description: Taxonomy plays a central role in biological sciences. It provides a communication system for scientists as it aims to enable correct identification of the studied organisms. As a consequence, species descriptions should seek to include as much available information as possible at species level to follow an integrative concept of 'taxonomics'. Here, we describe the cryptic species Epimeria frankei sp. nov. from the North Sea, and also redescribe its sister species, Epimeria cornigera. The morphological information obtained is substantiated by DNA barcodes and complete nuclear 18S rRNA gene sequences. In addition, we provide, for the first time, full mitochondrial genome data as part of a metazoan species description for a holotype, as well as the neotype. This study represents the first successful implementation of the recently proposed concept of taxonomics, using data from high-throughput technologies for integrative taxonomic studies, allowing the highest level of confidence for both biodiversity and ecological research.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1059
Flexural strengthening of reinforced concrete beams with fabric reinforced cementitious mortar : effect of reinforcement ratios
Creators: name: Billows, Trevor Norman Stanley
Publisher: name: University of British Columbia
Year: 2017

description: The current state of North America’s infrastructure system is in dire straits. The cost of repair is estimated at over $3.6 trillion in the United States alone. An innovative and cost-effective method of repair and retrofitting is vital to close what has been referred to as the infrastructure gap. As an alternative to the current methods, fabric reinforced cementitious mortar (FRCM) is proposed to aid the civil engineering industry in removing this gap. Applied to structural members externally, FRCM is characterized by its ability to strengthen and rehabilitate these structures. This study set out to determine the flexural strength improvement of reinforced concrete (RC) beams with different reinforcement ratios, textile layers, fabric materials and anchorage methods. Ten full-scale (200 x 300 x 4000mm) RC beams (2 controls, 8 strengthened) were cast and tested under monotonic four-point bending conditions. Ultimate flexural capacity, pseudo-ductility, energy absorption, stiffness, and failure mode were taken as performance indicators. Results showed all FRCM strengthened beams failed in a similar way to their control counterparts and FRCM did not affect the pre-yielding stiffness or ductility of the strengthened beams. However, FRCM significantly improved the beams’ yield load and flexural capacity over the control. Flexural strength improved by up to 81% over the control. Strength improved with an increase in textile layers, and U-shaped strengthened specimens outperformed their soffit-strengthened equivalents.
Assessing Student Retention and Progression: A Multi-Modal Approach
Creators: name: Phil, Ice
Publisher: name: Editura Universitara
Year: 2012
Subjects: subject: 0 Social sciences
subject: 37 Education
subject: 371 Instructional design
subject: 004:37 Elearning

description: Student retention and progression are important measures of success for post secondary education. They are key factors by which online programs, in particular, are currently scrutinized. This presentation reviews a successfully implemented, multi-modal approach that leverages data mining and quantitative analysis, supported by text analytics. American Public University System, began assessing student retention with an exploratory model utilizing regression analysis with 32 variables from the student information system.
Supersymmetric Nonlinear Sigma Model in AdS_5
Creators: name: Bagger, Jonathan
name: Li, Jingsheng
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct the supersymmetric nonlinear sigma model in a fixed AdS_5 background. We use component fields and find that the complex bosons must be the coordinates of a hyper-Kahler manifold that admits a Killing vector satisfying an inhomogeneous tri-holomorphic condition. We propose boundary conditions that map the on-shell bulk hypermultiplets into off-shell chiral multiplets on 3-branes that foliate the bulk. The supersymmetric AdS_5 isometries reduce to superconformal transformations on the brane fields.
description: Latex, 7 pages. Published version
title: vd02_C
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: godet
subject: expérimentation
subject: poterie

description: Godet expérimental en céramique
description: 1 fichier 3D (ply), 1 fichier image (jpg)
Leptogenesis constraints from flavour symmetry induced lepton mixing
Creators: name: Varzielas, Ivo de Medeiros
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In models with flavour symmetries added to the gauge group of the Standard Model the CP-violating asymmetry necessary for leptogenesis may be related with low-energy parameters. A particular case of interest is when the flavour symmetry produces an exact mass independent lepton mixing scheme, leading to a vanishing CP-violating asymmetry. We present a model-independent discussion that confirms this always occurs for unflavoured leptogenesis in type I see-saw scenarios.
description: Proceedings submission for ICHEP 2010, 4 pages, 1 figure
Mentorship, Academic and Prospective Career Success in Pre-Tertiary Educational Institutions: The Ghanaian Perspective
Creators: name: Tano, Emmanuella Afua Benewaa
Publisher: name: Zenodo
Year: 2019
Subjects: Mentoring, Academic achievement, Career, Adolescent, Guidance & Counseling

description: ABSTRACT

Background: Mentoring is a tool for developing the focus and willingness of an individual to make positive improvements. It is however to the disadvantage of the Ghanaian society to have little empirical evidence of how mentoring programs can be used as early intervention measures in complementing the education received by Ghanaian basic school students.

Method: Review of available literature on the adoption of mentoring in improving academics and career aspirations, was done through Google Scholar, ScienceDirect and JSTOR; using the keywords provided below.

Results: Mentoring can be used to enhance the Ghanaian basic school students’ academic performance and career choices, as they transition from adolescence into adulthood.  It can serve as a basis for which educationists can tailor and incorporate mentoring into the curriculum of basic schools in Ghana, as this would provide a sure start in accelerating the academic, personal and leadership development of the adolescent.

Conclusion: A shift towards mentoring in addressing the challenges facing Ghanaian adolescents, other than the usage of the traditional Guidance and Counseling technique, is much needed; in order that, much more opportunities for improvement and empowerment to greater achievements, are made available to students, right from the start of their academic journey.
Re-Study on the wave functions of $Υ(nS)$ states in LFQM and the radiative decays of $Υ(nS)\to η_b+γ$
Creators: name: Ke, Hong-Wei
name: Li, Xue-Qian
name: Wei, Zheng-Tao
name: Liu, Xiang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Light-front quark model (LFQM) has been applied to calculate the transition matrix elements of heavy hadron decays. However, it is noted that using the traditional wave functions of the LFQM given in literature, the theoretically determined decay constants of the $Υ(nS)$ obviously contradict to the data. It implies that the wave functions must be modified. Keeping the orthogonality among the $nS$ states and fitting their decay constants we obtain a series of the wave functions for $Υ(nS)$. Based on these wave functions and by analogy to the hydrogen atom, we suggest a modified analytical form for the $Υ(nS)$ wave functions. By use of the modified wave functions, the obtained decay constants are close to the experimental data. Then we calculate the rates of radiative decays of $Υ(nS)\to η_b+γ$. Our predictions are consistent with the experimental data on decays $Υ(3S)\to η_b+γ$ within the theoretical and experimental errors.
description: 10 pages, 2 figures, 1 table. Typos corrected and more discussions added. accepted for publication in Physical Review D