cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Being chosen and performing choice : young people engaging in imaginative and constrained secondary school practices in Vancouver, BC, Canada
Creators: name: Yoon, Ee-Seul
Publisher: name: University of British Columbia
Year: 2013

description: Over the last three decades, the political project of school choice policy, promoted by the Vancouver School District and the BC Ministry of Education, has been contentious. Many have contended that school choice further contributes to the fragmentation and associated hierarchies of the education system and of social structures in the urban context of Vancouver, a major city with rapidly rising ethnic diversity and socio-economically polarizing urban redevelopment. To shed further light on these concerns about school choice, in this study I investigate the ways in which young people, ages 11–19, positioned at various social, racial, and geographic locations and with varied social experiences, make sense of school choice policy. Here I focus particularly on the ways in which young people imagine, experience, and form certain modes of social, spatial, and racial identification and groups, as well as on the relationships between these groups under the mechanism of school choice. Between 2009 and 2010, I carried out a multi-sited ethnographic study from a critical socio-phenomenological perspective. I conducted 59 semi-structured interviews with students in transition (Grades 7, 8, and 12), observed 16 school information evenings and two secondary schools over a six-month period, and analyzed media discourses and policy texts as they pertained to broader social, urban, and political changes. I drew upon an interdisciplinary analytical framework of critical policy studies and youth studies and focused on three theoretical concepts: the imaginary, the imagination, and imaginary capital. These three concepts provide a key analytical framework for understanding the ways in which school choice complicates young people’s classification struggles and distinction-making (Bourdieu, 1984) within the widely circulating dominant social, urban, and national imaginary. I conclude that while current local policies of school choice can provide enriched alternative programs, they do so for only highly selective and competitive groups of students. Overall, my research findings point to the reality that school choice deepens existing social, spatial, and racial divisions, aggravates tensions, and ultimately worsens existing inequalities while producing new forms of social and educational stratification in the rapidly diversifying global city of Vancouver.
69603: Keble College: Roll of Honour, 1914 - 1918
Creators: name: Project Team, Oxford At War
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Keble College has published a digital Roll of Honour "in commemoration of those Keble men killed whilst serving in the Military and Naval Forces between 1914 and 1918". The Roll lists the men by name and provides information about their time at Keble and their War service, illustrated with photographs.
"Chasing convergence by respecting diversity - Lessons from chairing DSCC-IN" - FORGE 21 - Sep 10th 2021
Creators: name: Pasquale, Valentina
Publisher: name: Zenodo
Year: 2021
Subjects: open science
research data management
FAIR data
data steward

description: Slide presentation given on September 10th 2021 in the FORGE 21 - "Mapping the landscape" panel discussion.
Massive vector fields on the Schwarzschild spacetime: quasinormal modes and bound states
Creators: name: Rosa, Joao G.
name: Dolan, Sam R.
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 study the propagation of a massive vector or Proca field on the Schwarzschild spacetime. The field equations are reduced to a one-dimensional wave equation for the odd-parity part of the field and two coupled equations for the even-parity part of the field. We use numerical techniques based on solving (scalar or matrix-valued) three-term recurrence relations to compute the spectra of both quasi-normal modes and quasi-bound states, which have no massless analogue, complemented in the latter case by a forward-integration method. We study the radial equations analytically in both the near-horizon and far-field regions and use a matching procedure to compute the associated spectra in the small-mass limit. Finally, we comment on extending our results to the Kerr geometry and its phenomenological relevance for hidden photons arising e.g. in string theory compactifications.
description: 15 pages, 8 figures; minor corrections, to be published in Phys. Rev. D
Roux, Marc
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Genf
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
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Energy separation in oscillatory Hamiltonian systems without any non-resonance condition
Creators: name: Gauckler, Ludwig
name: Hairer, Ernst
name: Lubich, Christian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider multiscale Hamiltonian systems in which harmonic oscillators with several high frequencies are coupled to a slow system. It is shown that the oscillatory energy is nearly preserved over long times eps^{-N} for arbitrary N>1, where eps^{-1} is the size of the smallest high frequency. The result is uniform in the frequencies and does not require non-resonance conditions.
description: 13 pages
Schulthess, Caspar, Erben
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Zürich
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Schlick & Eckmann
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Lübeck
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Schaller, maire
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Courban
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
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Scattering zippers and their spectral theory
Creators: name: Marin, Laurent
name: Schulz-Baldes, Hermann
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A scattering zipper is a system obtained by concatenation of scattering events with equal even number of incoming and out going channels. The associated scattering zipper operator is the unitary equivalent of Jacobi matrices with matrix entries and generalizes Blatter-Browne and Chalker-Coddington models and CMV matrices. Weyl discs are analyzed and used to prove a bijection between the set of semi-infinite scattering zipper operators and matrix valued probability measures on the unit circle. Sturm-Liouville oscillation theory is developed as a tool to calculate the spectra of finite and periodic scattering zipper operators.
description: New Section 9 on periodic scattering zippers; to appear in J. Spec. Theory
Monte Carlo study of fermionic trions in a square lattice with harmonic confinement
Creators: name: Backes, S.
name: Titvinidze, I.
name: Privitera, A.
name: Hofstetter, W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the strong-coupling limit of a three-component Fermi mixture in an optical lattice with attractive interactions. In this limit bound states (trions) of the three components are formed. We derive an effective Hamiltonian for these composite fermions and show that it is asymptotically equivalent to an antiferromagnetic Ising model. By using Monte-Carlo simulations, we investigate the spatial arrangement of the trions and the formation of a trionic density wave (CDW), both in a homogeneous lattice and in the presence of an additional harmonic confinement. Depending on the strength of the confinement and on the temperature, we found several scenarios for the trionic distribution, including coexistence of disordered trions with CDW and band insulator phases. Our results show that, due to a proximity effect, staggered density modulations are induced in regions of the trap where they would not otherwise be present according to the local density approximation.
description: 10 pages, 8 figures
Samuel, M. L
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Hamburg
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
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Simulations of Accretion Powered Supernovae in the Progenitors of Gamma Ray Bursts
Creators: name: Lindner, Christopher C.
name: Milosavljevic, Milos
name: Shen, Rongfeng
name: Kumar, Pawan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observational evidence suggests a link between long duration gamma ray bursts (LGRBs) and Type Ic supernovae. Here, we propose a potential mechanism for Type Ic supernovae in LGRB progenitors powered solely by accretion energy. We present spherically-symmetric hydrodynamic simulations of the long-term accretion of a rotating gamma-ray burst progenitor star, a "collapsar," onto the central compact object, which we take to be a black hole. The simulations were carried out with the adaptive mesh refinement code FLASH in one spatial dimension and with rotation, an explicit shear viscosity, and convection in the mixing length theory approximation. Once the accretion flow becomes rotationally supported outside of the black hole, an accretion shock forms and traverses the stellar envelope. Energy is carried from the central geometrically thick accretion disk to the stellar envelope by convection. Energy losses through neutrino emission and nuclear photodisintegration are calculated but do not seem important following the rapid early drop of the accretion rate following circularization. We find that the shock velocity, energy, and unbound mass are sensitive to convective efficiency, effective viscosity, and initial stellar angular momentum. Our simulations show that given the appropriate combinations of stellar and physical parameters, explosions with energies ~5x10^50 ergs, velocities 3000 km/s, and unbound material masses >6 solar masses are possible in a rapidly rotating 16 solar mass main sequence progenitor star. Further work is needed to constrain the values of these parameters, to identify the likely outcomes in more plausible and massive LRGB progenitors, and to explore nucleosynthetic implications.
description: 20 Pages, 15 Figures, Accepted to ApJ
title: Supporting high quality cellular and Internet services on-board railways: a statistical evaluation of wireless repeater performance on-board railjet and cityjet trains
Creators: name: Da Silva Trindade, Orlando
Publisher: name: TU Wien
Year: 2021
Subjects: subject: Mobile Kommunikation im Reisezug
subject: Mobilfunkrepeater an Bord
subject: Hypothesentest
subject: In train mobile communication
subject: on-board wireless repeater
subject: hypothesis test.

description: The present work aims to support improvement on Internet and telephony services on-board railway vehicles by providing theoretical methodological apparatus to evaluate technologi-cal solutions in this context. The proposed method is used to benchmark the impacts of an Amplify-and-Forward (AF) wireless repeater on Radio Frequency signal quality (down-link) inside High Speed Train (HST)s, with focus on statistics of Radio Frequency (RF) received signal. To do so, mobile phones, under quasi-real usage conditions (voice and data services usages), are deployed inside an operational High Speed Train (HST) equipped with AF repeaters. Field measurements took place on railway tracks in Austria and covered five relevant bands: Global System for Mobile Communications (GSM) (bands 900MHz and 1800MHz), Universal Mobile Terrestrial Services (UMTS) (band 2100MHz) and Long Term Evolution (LTE) (bands 800MHz and 2600 MHz). The work combines bootstrap with para-metric and non-parametric statistical hypothesis tests to characterize distributional behavior of Radio Frequency signal power level on thousand-point-large data samples. Comparison of the Student’s t-test and Wilcoxon test has shown that parametric t-test does not correctly quantify the change, yielding an unreliable statistical significance, this test is efficient to point the direction of improvement; however. It was found that the combination of this test with bootstrapping and non-parametric test is efficient in measuring the stochastic change in signal levels inside HSTs resulting repeater influence. Data analysis have shown that repeater effect changes the stochastic features of signal levels on HSTs, it produces a left-tailed and right-bounded distribution with large departure from the normal distribution, an indication that a measure of performance cannot be given solely via change in the mean. Moreover, data investigation strongly support downlink improvement under repeater condition in rural and urban areas, except for cases in which signal strength inside the HST averages above -80dBm most of the time. In addition, analytical results also support that repeater produces different improvements under diverse Radio Access Technology (RAT).
Anomalous diffusion in systems driven by the stable Levy noise with a finite noise relaxation time and inertia
Creators: name: Srokowski, Tomasz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Dynamical systems driven by a general Lévy stable noise are considered. The inertia is included and the noise, represented by a generalised Ornstein-Uhlenbeck process, has a finite relaxation time. A general linear problem (the additive noise) is solved: the resulting distribution converges with time to the distribution for the white-noise, massless case. Moreover, a multiplicative noise is discussed. It can make the distribution steeper and the variance, which is finite, depends sublinearly on time (subdiffusion). For a small mass, a white-noise limit corresponds to the Stratonovich interpretation. On the other hand, the distribution tails agree with the Ito interpretation if the inertia is very large. An escape time from the potential well is calculated.
description: 11 pages, 6 figures
title: Внешняя политика французского королевства в 1660-е гг. по мемуарам графа Бюсси-Рабютена
Creators: name: Ялугина, Е. Е.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье оценивается мемуарное произведение графа де Бюсси-Рабютена как источник по изучению внешней политики Франции в 1660-е гг. Анализ позволил выявить, каким образом в источнике личного происхождения отражены основные внешнеполитические действия Французского королевства, что дало возможность, в свою
очередь, судить в целом о мемуарах как об источнике по изучению внешней политики Людовика XIV. Опора на историко-антропологический подход способствовала осмыслению авторской точки зрения на внешнеполитические события и личностного переживания исторического процесса, что вполне актуально для современных исследований.
The vacuum tunnelling and the crossover of deconfinement in Friedberg-Lee model
Creators: name: Shu, Song
name: Li, Jia-Rong
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have discussed the vacuum tunnelling in Friedberg-Lee model. The tunnelling coefficient is derived in the field configuration space by calculating the transition amplitude using the path integral under the stationary phase approximation and the dilute instanton gas approximation. By studying the tunnelling effect between the two degenerating vacuums at the critical temperature and chemical potential, we find that the system could be deconfined by tunnelling, which could possibly change the first order deconfinement phase transition to crossover.
description: 10 pages, 6 figures
Soldati, Ph. & Fils
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Turin
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Wörndel, A. S., & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Offenbach a. M.
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Titot, Castellux & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Haguenau
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
L^p solutions of reflected BSDEs under monotonicity condition
Creators: name: Rozkosz, Andrzej
name: Slominski, Leszek
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10

description: We prove existence and uniqueness of L^p solutions of reflected backward stochastic differential equations with p-integrable data and generators satisfying the monotonicity condition. We also show that the solution may be approximated by the penalization method. Our results are new even in the classical case p=2.
description: The article is slightly revised, results unchanged
Electroweak bremsstrahlung for wino-like Dark Matter annihilations
Creators: name: Ciafaloni, Paolo
name: Comelli, Denis
name: De Simone, Andrea
name: Riotto, Antonio
name: Urbano, Alfredo
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, its main annihilation channel is into W+W-, while the annihilation into light fermions is helicity suppressed. As pointed out recently, the radiation of gauge bosons from the initial state of the annihilation lifts the suppression and opens up an s-wave contribution to the cross section. We perform the full tree-level calculation of Dark Matter annihilations, including electroweak bremsstrahlung, in the context of an explicit model corresponding to the supersymmetric wino. We find that the fermion channel can become as important as the di-boson one. This result has significant implications for the predictions of the fluxes of particles originating from Dark Matter annihilations.
description: 13 pages, 3 figures. Minor corrections to match published version
Kambrium-Vendi töörühma välipäevik 4
Creators: name: Pirrus, Enn
name: Mens, Kaisa
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1965
Subjects: Cambrian
Vendian
Ediacara
Estonia
geological descriptions
Kambrium
Vend
geoloogilised kirjeldused

description: Field notebook with descriptions of Cambrian and Vendian drill cores in Estonia.
Steullet-Karm, Vve
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Eschentzwiller
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Random normal matrices and Ward identities
Creators: name: Ameur, Yacin
name: Hedenmalm, Haakan
name: Makarov, Nikolai
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Consider the random normal matrix ensemble associated with a potential on the plane which is sufficiently strong near infinity. It is known that, to a first approximation, the eigenvalues obey a certain equilibrium distribution, given by Frostman's solution to the minimum energy problem of weighted logarithmic potential theory. On a finer scale, one can consider fluctuations of eigenvalues about the equilibrium. In the present paper, we give the correction to the expectation of fluctuations, and we prove that the potential field of the corrected fluctuations converge on smooth test functions to a Gaussian free field with free boundary conditions on the droplet associated with the potential.
description: An unnecessary line on p.3 removed. (The line also contained a type-o.)
Seismic Performance of concrete buildings reinforced with superelastic shape memory alloy rebars
Creators: name: Hossain, Afrin
Publisher: name: University of British Columbia
Year: 2013

description: In this study, superelastic shape memory alloy (SMA) rebar was used as reinforcement in the plastic hinge regions of reinforced concrete beams. Twenty different reinforced concrete (RC) moment resisting frames of three different heights (3, 6, and 8-storys) were used in this study where SMA is gradually introduced from level 1 to the top most floor. The frames were designed according to the recent code of (CSA A23.3-04 2004) and assumed to be located in the high seismic zone of Western Canada. Nonlinear static pushover analysis and incremental dynamic analysis, (IDA) considering 20 earthquake records were performed to determine the best distribution of SMA rebars and investigate the seismic performance factors (SPFs). The best distribution of SMA rebars was determined based on the results of the seismic performance of steel and SMA frames obtained from the nonlinear incremental dynamic analysis (IDA) in terms of the maximum inter-story drift ratio (Max.ISDR), maximum residual inter-story drift ratio (Max.RISDR), roof drift ratio (RoofDR) and residual roof drift ratio (RRoofDR). The seismic performance of the SMA RC frames was evaluated where the acceptability of a trial value of the response modification coefficient, R factor was assessed and appropriate values of system overstrength factor, Ω0 and the deflection amplification factor, Cd were determined. The recent FEMA P695 (2009) methodology, was followed for this purpose. The obtained results on SPFs of all individual frames from nonlinear static pushover analysis (POA) and incremental non-linear dynamic analysis, (IDA) represent that the proposed seismic factors were within the range of permissible limit and when subjected to maximum considered earthquake, (MCE) a sufficient margin could be provided against collapse. Steel-SMA-RC frames experienced 4%-17% lower probability of collapse compared to the steel-RC frames.
Senn, Daniel
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Strassburg
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CrasyDSE: A framework for solving Dyson-Schwinger equations
Creators: name: Huber, Markus Q.
name: Mitter, Mario
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Dyson-Schwinger equations are important tools for non-perturbative analyses of quantum field theories. For example, they are very useful for investigations in quantum chromodynamics and related theories. However, sometimes progress is impeded by the complexity of the equations. Thus automatizing parts of the calculations will certainly be helpful in future investigations. In this article we present a framework for such an automatization based on a C++ code that can deal with a large number of Green functions. Since also the creation of the expressions for the integrals of the Dyson-Schwinger equations needs to be automatized, we defer this task to a Mathematica notebook. We illustrate the complete workflow with an example from Yang-Mills theory coupled to a fundamental scalar field that has been investigated recently. As a second example we calculate the propagators of pure Yang-Mills theory. Our code can serve as a basis for many further investigations where the equations are too complicated to tackle by hand. It also can easily be combined with DoFun, a program for the derivation of Dyson-Schwinger equations.
description: 39 pages, 8 tables, 9 figs.; program version 1.1.0; added summaries on main functions and more details on syntax and auxiliary functions; source code available at http://theorie.ikp.physik.tu-darmstadt.de/~mqh/CrasyDSE/
Wellez & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Paris
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Vaucourt, Notar
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Sainte-Croix-aux-Mines
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Steiner & Pestalozzi
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Zürich
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
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title: The role of education and training in the development of the Malaysian economy
Creators: name: Chung, Tsung Ping
Publisher: name: University of Kent
Year: 2021

description: This thesis aims to examine the role of education and training in Malaysia via the analysis of its impact on an individual. To do this, we have used a conventional human capital earnings function. Our findings show that there are positive and high returns to education in Malaysia. Our findings also indicate positive returns to training for a randomly selected group of women extracted from the Malaysian Family Life Survey data sets. This examination on training has been extended to include the determinants of training analysis and we have found that (a) training and education are complements and (b) women tend to be deterred from participating in training if they are credit constrained. The rates of returns to education in Malaysia are updated via the usage of the 1997 Malaysian Household Income Survey data set. The rates of returns to the different levels of education remain high and positive in Malaysia. We have also been able to form the trends of the returns to education using 6 sets of the Malaysian Household Income Survey data. The returns to education in Malaysia remained stable from 1984 to 1997 with the exception of the tertiary education level, where the returns were increasing over time. In order for the returns to education to be stable over time, the demand for skilled labour must have increased alongside increasing supply of skilled labour. This prediction is confirmed via our demand and supply framework analysis. The results do show that relative demand for skilled labour has increased alongside the rising relative supply of skilled labour. Our results also show that there are higher returns accrued to the higher levels of education, namely at the pre-university and higher education level. This condition of higher returns to higher levels of education is possible given the stages of rapid industrialisation in Malaysia. We conclude this thesis with a brief investigation into how the rates of return estimates can play a more prominent role in the Malaysian skill formation process. This investigation is done with the help of the developmental state skill formation model. We detect a plausible role of the rates of returns to education estimates in the Malaysian skill formation framework. We conclude that the role of education and training in Malaysia has been positive and has the potential to continue doing so
Signalling in single cell wound healing
Creators: name: Liao, Laura
Publisher: name: University of British Columbia
Year: 2013

description: A single cell, such as a frog egg, is able to repair injuries by orchestrating a localized signalling response on the plasma membrane. Proteins called Rho GTPases are recruited to, and form patterns around, the wound site. Patterning allows testable hypotheses to be made about the structure of the signalling network. Here, we extend a Rho GTPase signalling model from Simon et al. (2013) to test how a family of enzymes, protein kinase C (PKC), plays a role in cell repair signalling. Our models let PKCs affect basal Rho GTPase activation and/or inactivation rates, with increasing spatial detail. Ultimately, the model variants do not account for Rho GTPase patterning in all experiments. We suggest a new round of modelling and experiments to correct these issues.
Incorporating Ambipolar and Ohmic Diffusion in the AMR MHD code RAMSES
Creators: name: Masson, J.
name: Teyssier, R.
name: Mulet-Marquis, C.
name: Hennebelle, P.
name: Chabrier, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We have implemented non-ideal Magneto-Hydrodynamics (MHD) effects in the Adaptive Mesh Refinement (AMR) code RAMSES, namely ambipolar diffusion and Ohmic dissipation, as additional source terms in the ideal MHD equations. We describe in details how we have discretized these terms using the adaptive Cartesian mesh, and how the time step is diminished with respect to the ideal case, in order to perform a stable time integration. We have performed a large suite of test runs, featuring the Barenblatt diffusion test, the Ohmic diffusion test, the C-shock test and the Alfven wave test. For the latter, we have performed a careful truncation error analysis to estimate the magnitude of the numerical diffusion induced by our Godunov scheme, allowing us to estimate the spatial resolution that is required to address non-ideal MHD effects reliably. We show that our scheme is second-order accurate, and is therefore ideally suited to study non-ideal MHD effects in the context of star formation and molecular cloud dynamics.
Dynamical Localization in Disordered Quantum Spin Systems
Creators: name: Hamza, Eman
name: Sims, Robert
name: Stolz, Günter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B44

description: We say that a quantum spin system is dynamically localized if the time-evolution of local observables satisfies a zero-velocity Lieb-Robinson bound. In terms of this definition we have the following main results: First, for general systems with short range interactions, dynamical localization implies exponential decay of ground state correlations, up to an explicit correction. Second, the dynamical localization of random xy spin chains can be reduced to dynamical localization of an effective one-particle Hamiltonian. In particular, the isotropic xy chain in random exterior magnetic field is dynamically localized.
description: final version with minor revisions, accepted for Comm. Math. Phys
Vineens, C
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Hof / Voigtland
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Manipulating Majorana fermions using supercurrents
Creators: name: Romito, Alessandro
name: Alicea, Jason
name: Refael, Gil
name: von Oppen, Felix
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological insulator edges and spin-orbit-coupled quantum wires in proximity to s-wave super- conductors can be tuned through a topological quantum phase transition by a Zeeman field. Here we show that a supercurrent flowing in the s-wave superconductor also drives such a transition. We propose to use this new mechanism to generate and manipulate Majorana fermions that localize at domain walls between topological and nontopological regions of an edge or wire. In quantum wires, this method carries the added benefit that a supercurrent reduces the critical Zeeman field at which the topological phase appears.
description: 4+ pages, 6 figures, minor changes, added references; published version
Tunesi, Fratelli, qm Carlo
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Chiavenna
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Staehelin, Balthasar, de Benedict
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Basel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
FRW type of cosmology with a Chaplygin gas
Creators: name: Panigrahi, D.
name: Chatterjee, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The evolution of a universe modelled as a mixture of generalised Chaplygin gas and ordinary matter field is studied for a Robertson Walker type of spacetime. This model could interpolate periods of a radiation dominated, matter dominated and a cosmological constant dominated universe. Depending on the arbitrary constants appearing in our theory the instant of flip changes. Interestingly we also get a bouncing model when the signature of one of the constants changes. The velocity of sound may become imaginary under certain situations pointing to a perturbative state and consequently the possibility of structure formation. We also discuss the whole situation in the backdrop of wellknown Raychaudhury equation and a comparison is made with the previous results.
description: 22 Pages, 20 figures
Wieland (-Weis), -Schweighauser, J. H., Bürgermeister
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Basel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
title: CCC-News - Der Newsletter des CCC Hannover, Ausgabe 1/2025
Creators: name: Comprehensive Cancer Center (CCC) Hannover
Publisher: name: Medizinische Hochschule Hannover Bibliothek
Year: 2025
Subjects: subject: 610

description: CCC-News - Der Newsletter des CCC Hannover, vol. 2025, no. 1
title: Постструктуралистская критика классического анархизма
Creators: name: Яковлева, Я. И.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Статья посвящена критическому анализу классического анархизма. Анализ проведён с помощью инструментов философии постструктурализма. В его процессе выявлены недостатки классических концепций: а) отсутствие учёта конституирующей роли власти по отношению к субъекту; б) утверждение возможности пространства сопротивления, полностью независимого от власти; в) эссенциалистское понимание и разграничение
оппозиций. Рассмотрены точки зрения мыслителей-постанархистов. Проанализированы их альтернативные практические предложения. Подведены итоги о справедливости постструктуралистской критики. В предложениях постанархистов обнаружена недостаточность конкретных стратегий для достижения социального идеала и рефлексии над обоснованием самого анархизма.
Thurneysen & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Paris
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Advancement of AO Technology for the next Generation of Extremely Large Telescopes
Creators: name: Gavel, Donald
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: Micro-electro mechanical devices (MEMS) deformable mirrors offer a compact
and affordable path to complex next generation AO instruments on large telescopes.
In this presentation we discuss the motivators and challenges of next generation
AO and describe our plans and experimental progress on two MEMS-based AO systems:
the high-contrast Gemini Planet Imager, the Shan eAO laser guidestar system, and
the proposed Keck Next Generation AO system.
On Inner Iterations in the Shift-Invert Residual Arnoldi Method and the Jacobi--Davidson Method
Creators: name: Jia, Zhongxiao
name: Li, Cen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65F15, 15A18, 65F10

description: Using a new analysis approach, we establish a general convergence theory of the Shift-Invert Residual Arnoldi (SIRA) method for computing a simple eigenvalue nearest to a given target $σ$ and the associated eigenvector. In SIRA, a subspace expansion vector at each step is obtained by solving a certain inner linear system. We prove that the inexact SIRA method mimics the exact SIRA well, that is, the former uses almost the same outer iterations to achieve the convergence as the latter does if all the inner linear systems are iteratively solved with {\em low} or {\em modest} accuracy during outer iterations. Based on the theory, we design practical stopping criteria for inner solves. Our analysis is on one step expansion of subspace and the approach applies to the Jacobi--Davidson (JD) method with the fixed target $σ$ as well, and a similar general convergence theory is obtained for it. Numerical experiments confirm our theory and demonstrate that the inexact SIRA and JD are similarly effective and are considerably superior to the inexact SIA.
description: 20 pages, 8 figures
69604: Chaplains in the War: Keble's Significant Contribution
Creators: name: Project Team, Oxford At War
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: A large number of Keble members served as Chaplains in the War, as described in this article by The Revd Dr Jenn Strawbridge
The B and B_s Meson Decay Constants from Lattice QCD
Creators: name: Na, Heechang
name: Monahan, Chris J.
name: Davies, Christine T. H.
name: Horgan, Ron
name: Lepage, G. Peter
name: Shigemitsu, Junko
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new determination of the B and B_s meson decay constants using NRQCD b-quarks, HISQ light and strange valence quarks and the MILC collaboration N_f=2+1 lattices. The new calculations improve on HPQCD's earlier work with NRQCD b-quarks by replacing AsqTad with HISQ valence quarks, by including a more chiral MILC fine ensemble in the analysis, and by employing better tuned quark masses and overall scale. We find f_B = 0.191(9)GeV, f_{B_s} = 0.228(10)GeV and f_{B_s}/f_B = 1.188(18). Combining the new value for f_{B_s}/f_B with a recent very precise determination of the B_s meson decay constant based on HISQ b-quarks, f_{B_s} = 0.225(4)GeV, leads to f_B = 0.189(4)GeV. With errors of just 2.1% this represents the most precise f_B available today.
description: 12 pages with 14 figures. Version to appear in Physical Review D. Final result for f_{B_s} using NRQCD b-quarks updated to f_{B_s} = 0.228(10) GeV. Other results unchanged. Eq.(31) slightly modified and improved. References added
Soresi, Frères
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1836

description: Ort: Mailand
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
The Giant Magellan Telescope AO Program
Creators: name: Bouchez, Antonin
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: The Giant Magellan Telescope adaptive optics system will be an integral part of the
telescope, providing laser guide star generation, wavefront sensing, and wavefront
correction to most of the currently envisioned instruments. The system will provide
three observing modes: Natural Guidestar AO, Laser Tomographic AO, and Ground Layer
AO. All three modes will use the telescope’s segmented adaptive secondary mirror to
deliver a corrected beam directly to the instrument foci. We will describe the system
requirements, overall architecture, and innovative solutions found to the challenges
presentedby high-order AO on a segmented extremely large telescope. The GMT AO system
is currently in the preliminary design phase, and is expected to see first light
in 2020.
Cosmology and fundamental physics with the Euclid satellite
Creators: name: Amendola, Luca
name: Appleby, Stephen
name: Bacon, David
name: Baker, Tessa
name: Baldi, Marco
name: Bartolo, Nicola
name: Blanchard, Alain
name: Bonvin, Camille
name: Borgani, Stefano
name: Branchini, Enzo
name: Burrage, Clare
name: Camera, Stefano
name: Carbone, Carmelita
name: Casarini, Luciano
name: Cropper, Mark
name: deRham, Claudia
name: di Porto, Cinzia
name: Ealet, Anne
name: Ferreira, Pedro G.
name: Finelli, Fabio
name: Garcia-Bellido, Juan
name: Giannantonio, Tommaso
name: Guzzo, Luigi
name: Heavens, Alan
name: Heisenberg, Lavinia
name: Heymans, Catherine
name: Hoekstra, Henk
name: Hollenstein, Lukas
name: Holmes, Rory
name: Horst, Ole
name: Jahnke, Knud
name: Kitching, Thomas D.
name: Koivisto, Tomi
name: Kunz, Martin
name: La Vacca, Giuseppe
name: March, Marisa
name: Majerotto, Elisabetta
name: Markovic, Katarina
name: Marsh, David
name: Marulli, Federico
name: Massey, Richard
name: Mellier, Yannick
name: Mota, David F.
name: Nunes, Nelson
name: Percival, Will
name: Pettorino, Valeria
name: Porciani, Cristiano
name: Quercellini, Claudia
name: Read, Justin
name: Rinaldi, Massimiliano
name: Sapone, Domenico
name: Scaramella, Roberto
name: Skordis, Constantinos
name: Simpson, Fergus
name: Taylor, Andy
name: Thomas, Shaun
name: Trotta, Roberto
name: Verde, Licia
name: Vernizzi, Filippo
name: Vollmer, Adrian
name: Wang, Yun
name: Weller, Jochen
name: Zlosnik, Tom
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Euclid is a European Space Agency medium class mission selected for launch in 2019 within the Cosmic Vision 2015-2025 programme. The main goal of Euclid is to understand the origin of the accelerated expansion of the Universe. Euclid will explore the expansion history of the Universe and the evolution of cosmic structures by measuring shapes and redshifts of galaxies as well as the distribution of clusters of galaxies over a large fraction of the sky. Although the main driver for Euclid is the nature of dark energy, Euclid science covers a vast range of topics, from cosmology to galaxy evolution to planetary research. In this review we focus on cosmology and fundamental physics, with a strong emphasis on science beyond the current standard models. We discuss five broad topics: dark energy and modified gravity, dark matter, initial conditions, basic assumptions and questions of methodology in the data analysis. This review has been planned and carried out within Euclid's Theory Working Group and is meant to provide a guide to the scientific themes that will underlie the activity of the group during the preparation of the Euclid mission.
description: 236 pages, minor edits to match the journal version 2013
Cloud microphysical effects of turbulent mixing and entrainment
Creators: name: Kumar, Bipin
name: Schumacher, Joerg
name: Shaw, Raymond A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Turbulent mixing and entrainment at the boundary of a cloud is studied by means of direct numerical simulations that couple the Eulerian description of the turbulent velocity and water vapor fields with a Lagrangian ensemble of cloud water droplets that can grow and shrink by condensation and evaporation, respectively. The focus is on detailed analysis of the relaxation process of the droplet ensemble during the entrainment of subsaturated air, in particular the dependence on turbulence time scales, droplet number density, initial droplet radius and particle inertia. We find that the droplet evolution during the entrainment process is captured best by a phase relaxation time that is based on the droplet number density with respect to the entire simulation domain and the initial droplet radius. Even under conditions favoring homogeneous mixing, the probability density function of supersaturation at droplet locations exhibits initially strong negative skewness, consistent with droplets near the cloud boundary being suddenly mixed into clear air, but rapidly approaches a narrower, symmetric shape. The droplet size distribution, which is initialized as perfectly monodisperse, broadens and also becomes somewhat negatively skewed. Particle inertia and gravitational settling lead to a more rapid initial evaporation, but ultimately only to slight depletion of both tails of the droplet size distribution. The Reynolds number dependence of the mixing process remained weak over the parameter range studied, most probably due to the fact that the inhomogeneous mixing regime could not be fully accessed when phase relaxation times based on global number density are considered.
description: 17 pages, 10 Postscript figures (figures 3,4,6,7,8 and 10 are in reduced quality), to appear in Theoretical Computational Fluid Dynamics