cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Components of regulation of boreal forest understory vegetation : a text of fertilizer and herbivory
Creators: name: Dlott, Franklin
Publisher: name: University of British Columbia
Year: 2009

description: This study tests the predictions of two different hypotheses of trophic organization the 'bottom-up' and 'top-down' hypotheses respectively using plants in the boreal forest understory. The experiment manipulated plant resource levels by fertilization and consumer levels (vertebrate herbivory rate) using exclosures, and monitored the response of transplanted seedlings and the leaf area of the established vegetation. Survival and growth transplants was poorest at the highest fertilizer levels; a result not predicted by either 'bottomup' or 'top-down'. Herbivore exclosures had no significant effects on survival or growth at low or moderate herbivore densities; fertilizer addition did not increase leaf area. These results suggest that the resources added by fertilization and that the herbivores excluded were not limiting at these herbivore densities. At high herbivore densities transplant survival and growth was consistently greater inside exclosures which lends support to the 'top-down' hypothesis for seedling survival and performance, but leaf area did not significantly respond to either treatment but was greater inside exclosures especially when fertilized. A model of trophic relations in the boreal forest between understory plants, their resources and their consumers should only include herbivores as a limiting factor when their densities are abnormally high and even then the 'top-down' hypothesis is supported only from transplant data and not from existing vegetation.
Classification of classical twists of the standard Lie bialgebra structure on a loop algebra
Creators: name: Abedin, Raschid
name: Maximov, Stepan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 17B62, 17B38, 17B67 (Primary), 17B37 (Secondary)

description: The standard Lie bialgebra structure on an affine Kac-Moody algebra induces a Lie bialgebra structure on the underlying loop algebra and its parabolic subalgebras. In this paper we classify all classical twists of the induced Lie bialgebra structures in terms of Belavin-Drinfeld quadruples up to a natural notion of equivalence. To obtain this classification we first show that the induced bialgebra structures are defined by certain solutions of the classical Yang-Baxter equation (CYBE) with two parameters. Then, using the algebro-geometric theory of CYBE, based on torsion free coherent sheaves, we reduce the problem to the well-known classification of trigonometric solutions given by Belavin and Drinfeld. The classification of twists in the case of parabolic subalgebras allows us to answer recently posed open questions regarding the so-called quasi-trigonometric solutions of CYBE.
description: 30 pages, 2 figures
A Gamma-convergence argument for the blow-up of a non-local semilinear parabolic equation with Neumann boundary conditions
Creators: name: Soufi, Ahmad El
name: Jazar, Mustapha
name: Monneau, Régis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B35 ; 35B40 ; 35K55

description: In this paper we study a simple non-local semilinear parabolic equation with Neumann boundary condition. We give local existence result and prove global existence for small initial data. A natural non increasing in time energy is associated to this equation. We prove that the solution blows up at finite time $T$ if and only if its energy is negative at some time before $T$. The proof of this result is based on a Gamma-convergence technique.
Line-drag damping of Alfvén waves in radiatively driven winds of magnetic massive stars
Creators: name: Driessen, F. A.
name: Kee, N. D.
name: Sundqvist, J. O.
name: Owocki, S. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Line-driven stellar winds from massive (OB) stars are subject to a strong line-deshadowing instability. Recently, spectropolarimetric surveys have collected ample evidence that a subset of Galactic massive stars hosts strong surface magnetic fields. We investigate here the propagation and stability of magneto-radiative waves in such a magnetised, line-driven wind. Our analytic, linear stability analysis includes line-scattering from the stellar radiation, and accounts for both radial and non-radial perturbations. We establish a bridging law for arbitrary perturbation wavelength after which we analyse separately the long- and short-wavelength limits. While long-wavelength radiative and magnetic waves are found to be completely decoupled, a key result is that short-wavelength, radially propagating Alfvén waves couple to the scattered radiation field and are strongly damped due to the line-drag effect. This damping of magnetic waves in a scattering-line-driven flow could have important effects on regulating the non-linear wind dynamics, and so might also have strong influence on observational diagnostics of the wind structure and clumping of magnetic line-driven winds.
description: 11 pages, 3 figures. Accepted for publication in MNRAS
Recordings of child language and child-caregiver interaction with Child 17, a male child aged 5 years, 9 months, 22 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 31 in the materials collected in 2019 (Bundle 2018-19.069).
Entangled Kernels -- Beyond Separability
Creators: name: Huusari, Riikka
name: Kadri, Hachem
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Quantum Physics (quant-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We consider the problem of operator-valued kernel learning and investigate the possibility of going beyond the well-known separable kernels. Borrowing tools and concepts from the field of quantum computing, such as partial trace and entanglement, we propose a new view on operator-valued kernels and define a general family of kernels that encompasses previously known operator-valued kernels, including separable and transformable kernels. Within this framework, we introduce another novel class of operator-valued kernels called entangled kernels that are not separable. We propose an efficient two-step algorithm for this framework, where the entangled kernel is learned based on a novel extension of kernel alignment to operator-valued kernels. We illustrate our algorithm with an application to supervised dimensionality reduction, and demonstrate its effectiveness with both artificial and real data for multi-output regression.
Rayleigh-Bénard magnetoconvection with temperature modulation
Creators: name: Hazra, Suparna
name: Kumar, Krishna
name: Mitra, Saheli
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Floquet analysis of modulated magnetoconvection in Rayleigh-Bénard\ geometry is performed. The temperature of the lower plate is varied sinusoidally in time about a finite mean. As the Rayleigh number $\mathrm{Ra}$ is made to cross a critical value $\mathrm{Ra}_o$, the oscillatory magnetoconvection begins. The flow at the onset of magnetoconvection may oscillate either subharmonically or harmonically with the external modulation. The critical Rayleigh number $\mathrm{Ra}_o$ varies non-monotonically with $ω$ for appreciable value of $a$. The temperature modulation may either postpone or prepone the appearance of magnetoconvection. The magnetoconvective flow always oscillates harmonically at larger values of $ω$. The threshold $\mathrm{Ra}_o$ and the corresponding wave number $k_o$ approach to their values for the stationary magnetoconvection in the absence of modulation ($a = 0$), as $ω\rightarrow \infty$. Two different zones of harmonic instability merge to form a single instability zone with two local minima for higher values of Chandrasekhar's number $\mathrm{Q}$, which is qualitatively new. We have also observed a new type of bicritical point, which involves two different sets of harmonic oscillations. The effects of variation of $\mathrm{Q}$ and $\mathrm{Pr}$ on the threshold $\mathrm{Ra}_o$ and critical wave number $k_o$ are also investigated.
description: 10 pages, 10 figures
Untangling sustainability reporting: theoretical approaches informing non-financial disclosure
Creators: name: Bartolacci, Francesca
name: Bellucci, Marco
name: Corsi, Katia
name: Soverchia, Michela
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: non-financial disclosure, social and environmental accounting, systematic literature review, theoretical frameworks, sustainability reporting

description: This study analyses different theoretical frameworks used in the literature to explain corporate social and environmental sustainability (SES) reporting.

A systematic literature review of 232 scientific articles published in top-tier journals was performed through bibliometric visualizations, quantitative statistics and narrative analyses.

Results highlight that legitimacy, institutional, and stakeholder theories most commonly inform studies on SES reporting. Recent works also show the use of theoretical approaches less frequently employed in accounting and management that usually distinguish other research fields, such as sociology, psychology, and communication, highlighting cross-fertilization among different research areas.

This systematic literature review specifically focuses on the many theories related to SES reporting and offers an extensive overview of theoretical frameworks underpinning thirty years of studies on non-financial disclosure. Moreover, encourages scholars to engage with critical and emerging theories in the study of SES reporting following multidimensional and multidisciplinary perspectives.

 
description: Economia Aziendale Online -, Vol 14, No 4 (2023): ISSUE 4/2023
Simultaneous estimation of astrophysical and cosmological stochastic gravitational-wave backgrounds with terrestrial detectors
Creators: name: Martinovic, Katarina
name: Meyers, Patrick M.
name: Sakellariadou, Mairi
name: Christensen, Nelson
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The recent Advanced LIGO and Advanced Virgo joint observing runs have not claimed a stochastic gravitational-wave background detection, but one expects this to change as the sensitivity of the detectors improves. The challenge of claiming a true detection will be immediately succeeded by the difficulty of relating the signal to the sources that contribute to it. In this paper, we consider backgrounds that comprise compact binary coalescences and additional cosmological sources, and we set simultaneous upper limits on these backgrounds. We find that the Advanced LIGO, Advanced Virgo network, operating at design sensitivity, will not allow for separation of the sources we consider. Third generation detectors, sensitive to most individual compact binary mergers, can reduce the astrophysical signal via subtraction of individual sources, and potentially reveal a cosmological background. Our Bayesian analysis shows that, assuming a detector network containing Cosmic Explorer and Einstein Telescope and reasonable levels of individual source subtraction, we can detect cosmological signals $Ω_{\rm{CS}} (25\,\rm{Hz})=4.5 \times 10^{-13}$ for cosmic strings, and $Ω_{\rm BPL}(25\,\rm{Hz})= 2.2 \times 10^{-13}$ for a broken power law model of an early universe phase transition.
Statistics of percolating clusters in a model of photosynthetic bacteria
Creators: name: d'Auriac, Jean-Christian Anglès
name: Iglói, Ferenc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In photosynthetic organisms, the energy of light during illumination is absorbed by the antenna complexes, which is transmitted by excitons and is either absorbed by the reaction centers (RCs), which have been closed in this way, or emitted by fluorescence. The basic components of the dynamics of light absorption have been integrated into a simple model of exciton migration, which contains two parameters: the exciton hopping probability and the exciton lifetime. During continuous radiation with light the fraction of closed RCs, $x$, continuously increases and at a critical threshold, $x_c$, a percolation transition takes place. Performing extensive Monte Carlo simulations we study the properties of the transition in this correlated percolation model. We measure the spanning probability in the vicinity of $x_c$, as well as the fractal properties of the critical percolating cluster, both in the bulk and at the surface.
description: 7 pages, 6 figures
Pygmy dipole resonance as a constraint on the neutron skin of heavy nuclei
Creators: name: Piekarewicz, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The isotopic dependence of the isovector Pygmy dipole response in tin is studied within the framework of the relativistic random phase approximation. Regarded as an oscillation of the neutron skin against the isospin-symmetric core, the pygmy dipole resonance may place important constraints on the neutron skin of heavy nuclei and, as a result, on the equation of state of neutron-rich matter. The present study centers around two questions. First, is there a strong correlation between the development of a neutron skin and the emergence of low-energy isovector dipole strength? Second, could one use the recently measured Pygmy dipole resonance in 130Sn and 132Sn to discriminate among theoretical models? For the first question we found that while a strong correlation between the neutron skin and the Pygmy dipole resonance exists, a mild anti-correlation develops beyond 120Sn. The answer to the second question suggests that models with overly large neutron skins--and thus stiff symmetry energies--are in conflict with experiment.
description: 16 pages with 6 figures
Dissipation and mobility of atrazine, simazine, diazinon and chlorpyrifos in the Ryder soil of the Lower Fraser Valley, British Columbia
Creators: name: Top, Vera
Publisher: name: University of British Columbia
Year: 2009

description: Research was undertaken to determine the dissipation and mobility of four commonly used pesticides (simazine, atrazine, diazinon and chlorpyrifos) under the environmental conditions encountered in the Lower Fraser Valley of British Columbia. The pesticides studied were chosen based upon their widespread usage, their method of application which often involves direct deposition onto the soil, and the fact that all four compounds can be extracted and analyzed for simultaneously. In addition, previous work had shown that three of the four pesticides may be found as contaminants in groundwater in the Lower Fraser area. The research was conducted in field plots with a Ryder Series silt loam soil, similar in properties to the soils commonly used for raspberry production. The primary objective of the research was to aid in determining the potential for movement of these compounds into ground water when applied at the recommended rates and using methods similar to those used in standard agricultural practice. The results show that diazinon and chlorpyrifos dissipate very quickly, with half lives of 1-4 days under the conditions of this study, and that these two compounds display virtually no potential for vertical movement. Atrazine and simazine dissipate at a much slower rate, with half lives of 45-80 days, and show a significant potential for vertical movement, having been detected in all samples at depths of 30-40 cm. Maximum concentrations at depth were detected 231 days after spray application where the quantities of atrazine and simazine, in the 30-35 cm depth, represented as much as 9.5% and nearly 13%, respectively, of the amounts originally applied to the soil surface. In addition to the parent compounds, two degradation products of atrazine and/or simazine were detected throughout the soil profile, from 0-40 cm, towards the end of the experiment. From the research it may be concluded that contamination of ground water with diazinon or chlorpyrifos can, in most cases, be attributed to point sources while contamination with atrazine or simazine may be via either point or non-point sources.
On a criterion for Catalan's Conjecture
Creators: name: Schlage-Puchta, Jan-Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D61

description: We give a new proof of a theorem by P. Mihailescu which states that the equation $x^p-y^q=1$ is unsolvable with $x, y$ integral and $p, q$ odd primes, unless the congruences $p^q \equiv p\pmod{q^2}$ and $q^p\equiv q \pmod{p^2}$ hold.
Dynamic analysis of tapping-mode AFM with sidewall probe subjected to effects of probe mass and sidewall extension
Creators: name: Eftekhar, Sina
name: Sarayi, Seyyed Mostafa Mousavi Janbeh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Atomic Force Microscopy with SideWall (AFM SW) is widely used for nano-scale surface measurements at side surfaces. In the current study, by taking into consideration the effects of sidewall beam and its probe, an analytical method is developed to explore the dynamics of AFM-SW. The effect of probe mass, sidewall extension length, and tip sample interactions on the resonance frequencies and amplitude of Micro-Cantilever is widely investigated. The obtained results of the analytical model demonstrate the significant effect of these parameters on the dynamics of AFM-SW. To verify the accuracy of the analytical model, the obtained results are compared against the simulation data of previously published works and a good agreement is observed. Resonance Frequency (RF) of cantilever clearly declines when the mass of probe is taken to account, especially in higher RFs. Besides, probe effect on RF is higher when sidewall beam is longer. Resonance frequency decreases when tip-sample interaction or probe mass is high, yet the amount of reduction is intensified when probe mass and interaction together are at higher point. An analytical method is developed to explore the dynamics of Atomic Force Microscopy with considering SideWall beam effects (AFM-SW). The effect of probe mass, sidewall extension length, and tip sample interactions on vibration of micro-cantilever is investigated. The obtained results are compared with previous literatures. The results show that Resonance Frequency (RF) of cantilever declines when the mass of probe is taken to account. Besides, probe effect on RF is higher when sidewall beam is longer. Resonance frequency decreases when tip-sample interaction or probe mass is high, yet the amount of reduction is intensified when they are at higher point.
Spin-transfer switching and low-field precession in exchange-biased spin valve nano-pillars
Creators: name: Wu, M. C.
name: Aziz, A.
name: Morecroft, D.
name: Blamire, M. G.
name: Hickey, M. C.
name: Ali, M.
name: Burnell, G.
name: Hickey, B. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a three-dimensional focused-ion beam lithography process we have fabricated nanopillar devices which show spin transfer torque switching at zero external magnetic fields. Under a small in-plane external bias field, a field-dependent peak in the differential resistance versus current is observed similar to that reported in asymmetrical nanopillar devices. This is interpreted as evidence for the low-field excitation of spin waves which in our case is attributed to a spin-scattering asymmetry enhanced by the IrMn exchange bias layer coupled to a relatively thin CoFe fixed layer.
description: 11 pages, 4 figures. To appear in APL, April 2008
Recordings of child language and child-caregiver interaction with Child 15, a male child aged 7 years, 2 months, 27 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 33 in the materials collected in 2019 (Bundle 2018-19.071).
Degradation and protection of cut slopes in weathered gneiss; a 40-year case study
Creators: name: Martin, R.P.
name: Howell, J.H.
Publisher: name: Geological Society of London
Year: 2024
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: A figure showing slope retreat over time and two tables giving details of calculated cross-sectional area losses and approximate inter-sectional volumetric losses of slope material.
QCD at small x and nucleus-nucleus collisions
Creators: name: Gelis, Francois
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: At large collision energy sqrt(s) and relatively low momentum transfer Q, one expects a new regime of Quantum Chromo-Dynamics (QCD) known as "saturation". This kinematical range is characterized by a very large occupation number for gluons inside hadrons and nuclei; this is the region where higher twist contributions are as large as the leading twist contributions incorporated in collinear factorization. In this talk, I discuss the onset of and dynamics in the saturation regime, some of its experimental signatures, and its implications for the early stages of Heavy Ion Collisions.
description: Plenary talk given at QM2006, Shanghai, November 2006. 8 pages, 8 figures
Recurrent Point Review Models
Creators: name: Cvejoski, Kostadin
name: Sanchez, Ramses J.
name: Georgiev, Bogdan
name: Bauckhage, Christian
name: Ojeda, Cesar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Deep neural network models represent the state-of-the-art methodologies for natural language processing. Here we build on top of these methodologies to incorporate temporal information and model how to review data changes with time. Specifically, we use the dynamic representations of recurrent point process models, which encode the history of how business or service reviews are received in time, to generate instantaneous language models with improved prediction capabilities. Simultaneously, our methodologies enhance the predictive power of our point process models by incorporating summarized review content representations. We provide recurrent network and temporal convolution solutions for modeling the review content. We deploy our methodologies in the context of recommender systems, effectively characterizing the change in preference and taste of users as time evolves. Source code is available at [1].
description: 8 pages, 6 figures, Published in: 2020 International Joint Conference on Neural Networks (IJCNN)
Entanglement enhancement and postselection for two atoms interacting with thermal light
Creators: name: Bradler, Kamil
name: Jauregui, Rocio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The evolution of entanglement for two identical two-level atoms coupled to a resonant thermal field is studied for two different families of input states. Entanglement enhancement is predicted for a well defined region of the parameter space of one of these families. The most intriguing result is the possibility of probabilistic production of maximally entangled atomic states even if the input atomic state is factorized and the corresponding output state is separable.
description: accepted for publication in J. Phys. B
Peculiarities of magnetic ordering in the S = 5/2 two-dimensional square-lattice antimonate NaMnSbO4
Creators: name: Vasilchikova, Tatyana
name: Nalbandyan, Vladimir
name: Shukaev, Igor
name: Koo, Hyun-Joo
name: Whangbo, Myung-Hwan
name: Lozitskiy, Andrey
name: Bogaychuk, Alexander
name: Kuzmin, Vyacheslav
name: Tagirov, Murat
name: Vavilova, Evgeniya
name: Vasiliev, Alexander
name: Zvereva, Elena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An orthorhombic compound, NaMnSbO4, represents a square net of magnetic Mn2+ ions residing in vertex-shared oxygen octahedra. Its static and dynamic magnetic properties were studied using magnetic susceptibility, specific heat, magnetization, electron spin resonance (ESR), nuclear magnetic resonance (NMR) and density functional calculations. Thermodynamic data indicate an establishment of the long-range magnetic order with TN about 44 K, which is preceded by a short-range one at about 55 K. In addition, a non-trivial wasp-waisted hysteresis loop of the magnetization was observed, indicating that the ground state is most probably canted antiferromagnetic. Temperature dependence of the magnetic susceptibility is described reasonably well in the framework of 2D square lattice model with the main exchange parameter J = -5.3 K, which is in good agreement with density functional analysis, NMR and ESR data.
Boundary-induced bulk phase transition and violation of Fick's law in two-component single-file diffusion with open boundaries
Creators: name: Brzank, Andreas
name: Schuetz, Gunter M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study two-component single-file diffusion inside a narrow channel that at its ends is open and connected with particle reservoirs. Using a two-species version of the symmetric simple exclusion process as a model, we propose a hydrodynamic description of the coarse-grained dynamics with a self-diffusion coefficient that is inversely proportional to the length of the channel. The theory predicts an unexpected nonequilibrium phase transition for the bulk particle density as the external total density gradient between the reservoirs is varied. The individual particle currents do not in general satisfy Fick's first law. These results are confirmed by extensive dynamical Monte-Carlo simulations for equal diffusivities of the two components.
description: 12 pages, 3 figures
Experiences of inter-"racial" married couples in a multicultural society
Creators: name: Yee, Lili Anne
Publisher: name: University of British Columbia
Year: 2009

description: This thesis offers a window into the lives of married inter-racial couples in the Lower Mainland area. I argue that the processes of racialization, that is, the process of the social construction of race, is reflected in the experiences of inter-racial couples. In addition, I argue that inter-racial relationships represent a test of the acceptance attitudes of a multicultural society. In a multicultural society that promotes itself as accepting other cultures into a Canadian "mosaic", an inter-racial marriage represents a model of inclusion. Two distinct cultures have joined and exist as one, thus reflecting the ideology of cultural pluralism. Compared with many other nation-states, Canada is widely distinguished for its "acceptance" of cultural differences and social equality as part of our collective vision (Fleras, 1989). Does this acceptance picture reflect reality for those individuals involved in an inter-racial marriage? I highlight two central issues in this thesis. The first issue explores the theoretical aspect of race as a social construction and the practices of this racialization process through the lives of inter-racial couples. The second issue examines the degree of acceptance, tolerance or intolerance toward inter-racial couples in a "multicultural" society. Using Vancouver as a geographical setting, I examine these two issues by interviewing Chinese-Canadian/European-Canadian married couples. I investigate, through their eyes, the process of racialization through analysis of their experiences, and how these experiences demonstrate commitment (or lack of commitment) to multiculturalism as an ideology and social reality. I present data from interviews with couples to understand 1) What are the experiences of an inter-racial couple living in a multicultural society? 2) How is race socially constructed in Vancouver in 1995? 3) Are the experiences of married Chinese-Canadian/European-Canadian couples reflective of a culturally pluralistic society? I draw from relevant literature on "race" and Multiculturalism in Canada, and from previous sociological studies on inter-racial relationships. I suggest that the experiences of inter-racial (Chinese/European) married couples will show the powerful impact of the processes of racialization and reflect the resistance and biases that result from a society which promotes acceptance and yet practices, at best, a form of tolerance. This suggests that surface appearances of cultural inclusion hide realities of non-acceptance and exclusionary practices. Although the subjects interviewed in this thesis do not represent all inter-racial couples, the thesis offers a Canadian perspective which complements existing literature in this area.
An analytical solution for nonlinear dynamics of one kind of scanning probe microscopes
Creators: name: Eftekhar, Sina
name: Sarayi, Seyyed Mostafa Mousavi Janbeh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The dynamic behavior of AFM is studied taking into account the nonlinear interaction forces between probe and sample. The exerted forces on the free end of micro-beam are simulated with the third degree polynomial. The effect of some parameters on the dynamics of AFM is studied. The results show that the frequency response of AFM is not sensitive to the tip mass in the case of both the sample and cantilever vibration. The effect of sample vibration is studied in the case of in-phase and anti-phase vibration. The results show that although the vibration amplitude of sample is very small compared to the amplitude of cantilever, it has great effect on the resonant frequency of the cantilever.
Runaway and hypervelocity stars in the Galactic halo: Binary rejuvenation and triple disruption
Creators: name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Young stars observed in the distant Galactic halo are usually thought to have formed elsewhere, either in the Galactic disk or perhaps the Galactic center, and subsequently ejected at high velocities to their current position. However, some of these stars have apparent lifetimes shorter the required flight time from the Galactic disk/center. We suggest that such stars have evolved in close runaway or hypervelocity binaries. Stellar evolution of such binaries can drive them into mass transfer configurations and even mergers. Such evolution could then rejuvenate them (e.g. blue stragglers) and extend their lifetime after their ejection. The extended lifetimes of such stars could then be reconciled with their flight times to the Galactic halo. We study the possibilities of binary runaway and hypervelocity stars and show that such binaries could have been ejected in triple disruptions and other dynamical interactions with stars or with massive black holes. We show that currently observed "too young" star in the halo could have been ejected from the Galactic disk or the Galactic center and be observable in their current position if they were ejected as binaries. Specifically it is shown that the hypervelocity star HE 0437-5439 could be such a rejuvenated star. Other suggestions for its ejection from the LMC are found to be highly unlikely. Moreover, it is shown that its observed metallicity is most consistent with a Galactic origin and a Galactic center origin can not currently rule out. In addition, we suggest that triple disruptions by the massive black hole in the Galactic center could also capture binaries in close orbits near the MBH, some of which may later evolve to become more massive rejuvenated stars.
description: 11 pages, 2 figures, 2 tables. Improved analysis. ApJ, in press
Datasets Exploring Metadata Commonalities Across Restricted Health Data Sources in Canada
Creators: name: Smith, Victoria
name: Rutley, Sarah
name: Leahey, Amber
name: Gibson, Grant A
name: Stathis, Kelly
name: Peterson, Lynn
name: Read, Kevin B.
name: Shi, Julie
Publisher: name: OSF
Year: 2022
Subjects: data access
data discovery
data sharing
health data
metadata
restricted data

description: This project includes three datasets: the first dataset compiles dataset metadata commonalities that were identified from 48 Canadian restricted health data sources. The second dataset compiles access process metadata commonalities extracted from the same 48 data sources. The third dataset maps metadata commonalities of the first dataset to existing metadata standards including DataCite, DDI, DCAT, and DATS. This mapping exercise was completed to determine whether metadata used by restricted data sources aligned with existing standards for research data.
Red noise and pulsations in evolved massive stars
Creators: name: Naze, Yael
name: Rauw, Gregor
name: Gosset, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We examine high-cadence space photometry taken by the Transiting Exoplanet Survey Satellite (TESS) of a sample of evolved massive stars (26 Wolf-Rayet stars and 8 Luminous Blue Variables or candidate LBVs). To avoid confusion problems, only stars without bright Gaia neighbours and without evidence of bound companions are considered. This leads to a clean sample, whose variability properties should truly reflect the properties of the WR and LBV classes. Red noise is detected in all cases and its fitting reveals characteristics very similar to those found for OB-stars. Coherent variability is also detected for 20% of the WR sample. Most detections occur at moderately high frequency (3--14/d), hence are most probably linked to pulsational activity. This work doubles the number of WRs known to exhibit high-frequency signals.
description: accepted by MNRAS - the arxiv version has some figures in low-resolution
Recordings of child language and child-caregiver interaction with Child 14, a female child aged 7 years, 8 months, 11 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of task-oriented child-caregiver interaction (researcher present). Audio and video recordings of free play between child and caregiver (researcher not present). Text file describing contents of recordings.

This is the same child as Child 12 in the materials collected in 2019 (Bundle 2018-19.050).
Low-frequency unsteadiness mechanisms in shock wave/turbulent boundary layer interactions over a backward-facing step
Creators: name: Hu, Weibo
name: Hickel, Stefan
name: van Oudheusden, Bas W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The low-frequency unsteady motions behind a backward-facing step (BFS) in a turbulent flow at $Ma=1.7$ and $Re_\infty=1.3718\times 10^5$ is investigated using a well-resolved large-eddy simulation (LES). The instantaneous flow field illustrates the unsteady phenomena of the shock wave/boundary layer interaction (SWBLI) system, including vortex shedding in the shear layer, the flapping motions of the shock and breathing of the separation bubble, streamwise streaks near the wall and arc-shaped vortices in the turbulent boundary layer downstream of the separation bubble. A spectral analysis reveals that the low-frequency behaviour of the system is related to the interaction between shock wave and separated shear layer, while the medium-frequency motions are associated with the shedding of shear layer vortices. Using a three-dimensional dynamic mode decomposition (DMD), we analyse the individual contributions of selected modes to the unsteadiness of the shock and streamwise-elongated vortices around the reattachment region. Görtler-like vortices, which are induced by the centrifugal forces originating from the strong curvature of the streamlines in the reattachment region, are strongly correlated with the low-frequency unsteadiness in the current BFS case. Our DMD analysis and the comparison with an identical but laminar case provide evidence that these unsteady Görtler-like vortices are affected by fluctuations in the incoming boundary layer. Compared to SWBLI in flat plate and ramp configurations, we observe a slightly higher non-dimensional frequency (based on the separation length) of the low-frequency mode.
Exotic gapless spectrum induced by frustration in quantum antiferromagnets
Creators: name: Becca, Federico
name: Capriotti, Luca
name: Parola, Alberto
name: Sorella, Sandro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show strong numerical evidence in favor of an unexpected virtually gapless spectrum, with edge states localized at the boundaries, in frustrated spin-1/2 antiferromagnetic ladders with an odd number of legs. These features can be accurately reproduced by using a projected BCS wave function with a non-trivial pairing, that mixes even and odd reflection symmetries. This approach gives the correct classification of the excitations and provides a simple and very appealing picture of an unconventional spin-liquid phase stabilized by frustration.
description: 4 pages and 4 figures
Generalized 2-vector spaces and general linear 2-groups
Creators: name: Elgueta, Josep
Publisher: name: arXiv
Year: 2006
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: In this paper a notion of {\it generalized 2-vector space} is introduced which includes Kapranov and Voevodsky 2-vector spaces. Various kinds of generalized 2-vector spaces are considered and examples are given. The existence of non free generalized 2-vector spaces and of generalized 2-vector spaces which are non Karoubian (hence, non abelian) categories is discussed, and it is shown how any generalized 2-vector space can be identified with a full subcategory of an (abelian) functor category with values in the category ${\bf VECT}_K$ of (possibly infinite dimensional) vector spaces. The corresponding general linear 2-groups $\mathbb{G}\mathbb{L}({\bf Vect}_K[\mathcal{C}])$ are considered. Specifically, it is shown that $\mathbb{G}\mathbb{L}({\bf Vect}_K[\mathcal{C}])$ always contains as a (non full) sub-2-group the 2-group ${\sf Equiv}_{Cat}(\mathcal{C})$ (hence, for finite categories $\mathcal{C}$, they contain {\sl Weyl sub-2-groups} analogous to usual Weyl subgroups of the general linear groups), and $\mathbb{G}\mathbb{L}({\bf Vect}_K[\mathcal{C}])$ is explicitly computed (up to equivalence) in a special case of generalized 2-vector spaces which include those of Kapranov and Voevodsky. Finally, other important drawbacks of the notion of generalized 2-vector space, besides the fact that it is in general a non Karoubian category, are also mentioned at the end of the paper.
description: 35 pages
Studies on reproductive characteristics and artificial insemination in captive Mallard Ducks (Anas platyrhynchos)
Creators: name: Stunden, Carolyn Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: Several studies were conducted to evaluate the use of artificial insemination (AI) as a means to improve the reproductive success of hand-reared wild-strain Mallards (Anas platyrhynchos). The effects of age, mate choice and isolation on reproductive parameters of captive Mallards were studied. Eighteen adult and yearling hens were allowed physical, visual-auditory or auditory only contact with drakes. In addition, another 28 yearling hens were placed (17 random, 15 self-chosen) with yearling drakes. Age of males was a key determinant in Mallard reproductive success, specifically egg fertility. Self-chosen pairs performed better than randomly assigned pairs and isolation of hens from drakes did not affect egg production. The data suggests that artificial breeding is needed to supplement natural mating and increase egg fertility in yearlings. Since egg fertility was generally low in captive held yearling Mallards, comparisons between captive and free-flying Mallard drakes were made to assess differences in gonadal development. Measurements of numerous parameters indicated that, gonadal development was suppressed in captive drakes of both age classes. For the captive drakes, seasonal profiles of testosterone (T) levels and semen characteristics were determined in yearlings and adults. Plasma T concentrations increased from basal levels in March, peaked in April and decreased to basal levels in May. The decrease in T concentration to basal level occurred two weeks earlier in yearlings compared to that of adults. Surprisingly, semen volume and semen concentration were not different between the two age groups. Mallards were artificially inseminated by modifying a technique developed for domesticated poultry. Egg fertility obtained with Al was 73%. Thus, these results suggest that Al may indeed be used successfully in propagating wild Mallards. Two poultry semen extenders [Beltsville Poultry Semen Extender (BPSE) and Lake's Poultry Semen Extender (LAKE)] were compared with respect to their effects ..on sperm survival and sperm fertilizing capacity. BPSE and LAKE worked equally well to maintain the semen fertilizing capacity during short-term storage. Last of all, effects of various concentrations of cryoprotectants [glycerol, ethylene glycol (EG), propylene glycol (PG) and sucrose] on the fertilizing capacity of unstored chicken spermatozoa were tested. The addition of sucrose to EG or PG on the viability of frozen- thawed chicken semen was determined. Fertility declined with increasing concentrations of glycerol and sucrose, but not with increasing concentrations of EG and PG. The addition of sucrose (0.2 M) did not improve freeze-thaw protection of EG and PG.
Intuitive Facial Animation Editing Based On A Generative RNN Framework
Creators: name: Berson, Eloïse
name: Soladié, Catherine
name: Stoiber, Nicolas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.7

description: For the last decades, the concern of producing convincing facial animation has garnered great interest, that has only been accelerating with the recent explosion of 3D content in both entertainment and professional activities. The use of motion capture and retargeting has arguably become the dominant solution to address this demand. Yet, despite high level of quality and automation performance-based animation pipelines still require manual cleaning and editing to refine raw results, which is a time- and skill-demanding process. In this paper, we look to leverage machine learning to make facial animation editing faster and more accessible to non-experts. Inspired by recent image inpainting methods, we design a generative recurrent neural network that generates realistic motion into designated segments of an existing facial animation, optionally following user-provided guiding constraints. Our system handles different supervised or unsupervised editing scenarios such as motion filling during occlusions, expression corrections, semantic content modifications, and noise filtering. We demonstrate the usability of our system on several animation editing use cases.
Understanding Strategic Planning and Continuous Improvement: The mediation of Quality Results and Education and Training
Creators: name: Yangailo, Tryson
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: strategic planning, quality results, education, training, continuous improvement, mediation

description: Continuous improvement is one of the most important outcomes expected from the strategic planning process, especially in today's dynamic and competitive environment. The importance of strategic planning process in ensuring continuous improvement in business activities is paramount and cannot be overemphasised. This study depicts how quality results and education and training mediate the relationship between strategic planning and continuous improvement using 151 sample data collected through questionnaire from management employees of Tanzania Zambia Railway Authority. Principal component analysis, factor analysis and regression analysis were used to test model fit, validity and reliability using Jamovi software. The study presents that strategic planning and quality results have a significant impact on continuous improvement and that quality results mediate the relationship between strategic planning and continuous improvement. The study also shows that education/training does not mediate the relationship between strategic planning and continuous improvement. The nature of the relationship between strategic planning and continuous improvement is examined empirically in this study. This study also provides evidence that quality results is an important element in the strategic planning process at all stages. In today's dynamic environment, managers need to be constantly aware and vigilant about the quality results.
description: Economia Aziendale Online -, Vol 14, No 4 (2023): ISSUE 4/2023
QCD vacuum condensates from tau-lepton decay data
Creators: name: Dominguez, C. A.
name: Schilcher, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The QCD vacuum condensates in the Operator Product Expansion are extracted from the final ALEPH data on vector and axial-vector spectral functions from $τ$-decay. Weighted Finite Energy Sum Rules are employed in the framework of both Fixed Order and Contour Improved Perturbation Theory. An overall consistent picture satisfying chirality constraints can be achieved only for values of the QCD scale below some critical value $Λ\simeq350 {MeV}$. For larger values of $Λ$, perturbation theory overwhelms the power corrections. A strong correlation is then found between $Λ$ and the resulting values of the condensates. Reasonable accuracy is obtained up to dimension $d=8$, beyond which no meaningful extraction is possible.
description: Revised version: minor explanatory sentences added. No change in results nor figures
Quotient groups of the fundamental groups of certain strata of the moduli space of quadratic differentials
Creators: name: Walker, Katharine C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 30F30; 14D20

description: In this paper, we study fundamental groups of strata of the moduli space of quadratic differentials. We use certain properties of the Abel-Jacobi map, combined with local surgeries on quadratic differentials, to construct quotient groups of the fundamental groups for a particular family of strata.
description: 43 pages, 7 figures. Version 2: Minor typos fixed, Section 3 removed and may now be found in arXiv:0804.0434