cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A piezokinetic study of the solvolyses of benzyl chlorides.
Creators: name: Martin, Reginald L.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1967
Subjects: subject: Chemistry, Physical.

description: Rate constants for the solvolysis of benzyl chloride, p-methyl benzyl chloride, p-nitro benzyl chloride and p-chloro benzyl chloride were determined at four pressures at 50°C in an acetone-water mixture containing 0.1407 mole fraction acetone. Rate constants for the solvolysis of p-methyl benzyl chloride in four acetone-water mixtures were also determined at four pressures at 50°C. The partial molar volumes of this latter compound were determined in these same acetone-water mixtures at 25°C. The log10k-pressure data were fitted to polynomials of the first or second order and the volumes of activation and the parameters (delta DeltaV*/delta P)T were calculated. It was found that the volumes of activation were all negative and varied with substituent in the order p-CH3 > H > p-Cl > p-NO2 and the parameters (delta DeltaV*/delta P)T were zero or positive, varying in the order p-NO 2 > p-Cl > H > p-CH3. Several effects which could produce this behavior were explored but it was not possible to assign these reactions to either the extreme SN1 or SN 2 categories on the basis of these results. It was also found that the volumes of activation for the solvolysis of p-methyl benzyl chloride in different acetone-water mixtures passed through a minimum when plotted against solvent compositions. The partial molar volume of p-methyl benzyl chloride passed through a maximum as a function of solvent composition. This suggested that the minimum in the volumes of activation arose at least in part from a maximum in the partial molar volumes of the reactants. A linear correlation between the entropies and volumes of activation is observed. This is discussed in terms of simple dielectric theory.
Improvements and performance analysis of IEEE 80211 medium access protocols
Creators: name: Ekici, Ozgur
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2009
Subjects: subject: Engineering, Electronics and Electrical.

description: In IEEE 802.11 standard development process, new physical and medium access layer techniques for higher throughput (IEEE 802.11n) and quality of service (IEEE 802.11e) enhancements are being designed on solid foundation of the distributed coordination function. None of these recently developed enhancements are immune to hidden node and hot-spot (congestion) problems. On the contrary, the increased operational bandwith of the higher throughput implementation makes them more prone to interference in limited number of IEEE 802.11 channels. Distributed coordination function is and will be the primary contention resolution algorithm of IEEE 802.11 systems. Identification and formulation of the common problems this channel access technique is facing in practical networks would give us a better understanding in terms of its limitations. In this work, we introduce a methodology to estimate the throughput performance of distributed coordination in unsaturated and hidden communication environments. Then by applying this methodology, we analytically estimate the abnormality in its fairness performance. The secondary channel access scheme of IEEE 802.11 is point coordination function, which does not suffer from hidden node and collision problems. We show that point coordination function in its current form has a poor throughput performance due to ignoring of the multi-rate transmission capability of users. We propose a new indexing algorithm for polling that increases the performance of point coordination function significantly. In this thesis, we extend the performance analysis of the distributed coordination function to enterprise networks configurations where networks are typically comprised of multiple access points. We propose an intelligent association algorithm that provides consistent higher throughput and better network-wide fairness independent of user load distribution within the network in comparison to the standard association algorithm.
Finite element formulation for analysis of pipes based on thin shell theory
Creators: name: Weicker, Kevin
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2008
Subjects: subject: Engineering, Civil.

description: A general solution for the stress-deformation analysis of pipes subjected to general loading conditions is developed. The solution is based on the assumptions of thin-walled shell theory and is limited to straight pipes of prismatic cross-section made of linearly elastic isotropic material subjected to general loading. The principle of stationary potential energy is used in conjunction with general Fourier series expansion for the displacement fields to formulate the equilibrium conditions and boundary conditions. The equilibrium equations for each Fourier mode are observed to be uncoupled from other modes, a feature that is exploited in formulating a general closed form solution for the displacement fields. The analytical solution developed is then successfully adopted to solve two pipe problems. Comparisons with established finite element solutions demonstrate the ability of the model to accurately capture complex shell behaviour with a remarkably small number of degrees of freedoms. However, the algebraic manipulations in the analytical solution are found quite tedious for hand calculations, even for simple problems. In order to remedy this limitation and to make the solution scheme amenable to more complex problems, a finite element solution is formulated based on the analytical solution developed. The expressions for the displacement fields obtained are used to formulate a series of exact shape functions which relate the intermediate displacements within a finite element to the nodal displacements. Using the exact shape functions, the principle of stationary potential energy is adopted to formulate the stiffness matrices and associated energy equivalent load vectors for pipe finite elements. The new finite element is tested for a variety of practical loading conditions including point loads, gravity loads, internal and external pressure, twisting deformation, axial deformation, transverse deformations, and combinations thereof. Results are found in excellent agreement with those based on shell finite elements in ABAQUS. The pipe element developed is shown to be free of discretization errors and is thus computationally efficient. The element can very accurately predict the displacements and stresses of a pipe with only a very few elements and a few Fourier modes.
Roles of bromodomain in the regulation of p300-dependent gene expression
Creators: name: Al-Ghazawi, Feras
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2009
Subjects: subject: Biology, Genetics.

description: The transcriptional coactivator p300 displays an intrinsic histone acetyltransferase activity. It contains an evolutionarily conserved bromodomain serving as a specific acelyl-lysine binding module for histones or transcription factors to facilitate chromatin remodeling and transcriptional activation. The function of p300 is required by a diverse set of promoters. However, roles of bromodomain in the function of p300 are yet to be fully determined. In this study, we utilize cell lines expressing either wild-type or bromodomain truncated p300 to examine the expression of several p300-dependent genes that are involved in cell cycle regulation. The effects of histone acetylation on the expression of these genes were also examined by utilizing histone deacetylase inhibitors. Our results suggest that p300 regulates genes through different mechanisms and that bromodomain has roles in the recruitment of p300 to target promoters, providing an indication that the role of bromodomain in p300-dependent transcription is determined by individual promoter context.
Testing the reliability of Canada-wide and regional species distribution models with independent field surveys and evaluating their use for conservation
Creators: name: Nadeau, Julie L
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Biology, Conservation.

description: For purposes of conservation, we require methods to predict where species occur currently, and where they are likely to move in the future. Species distribution models can be useful tools, by predicting where species are in areas that cannot be surveyed but where management decisions must occur. However, they are rarely tested using independent field surveys to determine their accuracy. These models are also generally developed over broad spatial scales; in contrast, distributions must often be predicted over local to regional scales for conservation purposes. Using butterfly surveys along transects in eastern Ontario, we tested whether independent regional observations of butterflies could be predicted from distribution models developed on Canada-wide species ranges. We also developed a set of regional models using Maximum entropy software to compare with the independent field surveys. Our results show that regional field occurrences are not accurately predicted by the national models, which explain between 0 and 31% (median 4.2%) of the deviance in species presence/absence. Even when species distribution models developed using regional variables have high apparent accuracy (AUC values exceed 0.8), they do not appear to accurately predict occurrence at local spatial extents, explaining between 0 and 46% (median 3.4%) of the deviance in species presence/absence. Species distribution models' inaccuracy in predicting species' presence within their ranges indicates that field-based observations remain indispensable when making conservation decisions. Misusing models can be costly if they lead to errors in predicting the presence of species of concern or their habitat and can result in poor management decisions if used improperly.
Improving the Canadian Air Quality Index (AQI) formulation: Research syntheses of index development and AQI formulation approaches, and analytical comparisons of AQI formulation options
Creators: name: Economou, Vanita
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2007
Subjects: subject: Health Sciences, Public Health.
subject: Environmental Sciences.

description: There has been increasing evidence showing that current Canadian Air Quality Indices (AQIs) are not providing the public with accurate information on air quality conditions. In response, a process for improvement of Canadian AQIs was initiated in 2001 by Environment Canada and a broad multi-stakeholder community. This thesis work was conducted in an effort to aid this process and produce new knowledge in the area of AQI formulation and application. Two reviews were undertaken to identify the conceptual and measurement aspects of index development, and the current state of knowledge relating to AQI formulation. An analytical comparison of AQI formulation options was conducted using air pollution data from four urban centres in Ontario. The results suggest that there are a number of advantages associated with the health risk based formulation approach developed by Health Canada. Recommendations for Canadian AQI improvement are presented.
The effect of wave dark matter on equal mass black hole mergers
Creators: name: Aurrekoetxea, Josu C.
name: Clough, Katy
name: Bamber, Jamie
name: Ferreira, Pedro G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For dark matter to be detectable with gravitational waves from binary black holes, it must reach higher than average densities in their vicinity. In the case of light (wave-like) dark matter, the density of dark matter between the binary can be significantly enhanced by accretion from the surrounding environment. Here we show that the resulting dephasing effect on the last ten orbits of an equal mass binary is maximized when the Compton wavelength of the scalar particle is comparable to the orbital separation, $2π/μ\sim d$. The phenomenology of the effect is different from the channels that are usually discussed, where dynamical friction (along the orbital path) and radiation of energy and angular momentum drive the dephasing, and is rather dominated by the radial force (the spacetime curvature in the radial direction) towards the overdensity between the black holes. Whilst our numerical studies limit us to scales of the same order, this effect may persist at larger separations and/or particle masses, playing a significant role in the merger history of binaries.
description: 4 pages, 4 figures, 1 appendix, 1 movie: https://youtu.be/2VJIfqCp7D8. Matches version published in PRL
The role of E2F1 as downstream target for Rb in cortical development
Creators: name: Douda, David N
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2007
Subjects: subject: Biology, Neuroscience.

description: Cell cycle regulation is believed to be crucial to nervous system development. In this study, we investigated whether Rb plays a role in the expression of guidance molecules involved in neuronal migration. We found an ectopic expression of robo2 gene, and an increase in the expression of neogenin gene in the developing cortex in conditional Rb knockout mice, suggesting an involvement for Rb in the expression of these genes. We also investigated whether deregulated activity of E2F1 is involved in the defects observed in Rb mutant mice. Using mice with compound null mutations for Rb and E2F1, we found that ectopic proliferation was rescued, and the aberrant laminar patterning in the cortex was restored, while there was a partial rescue in the survival of Cajal-Retzius neurons. Tangential migration of GABA-ergic interneurons, however, was not rescued. Thus, we have demonstrated that E2F1 is involved in Rb mediated ectopic mitoses, cortical laminar patterning, and partially, for the requirement of Rb in the survival of Cajal-Retzius neurons.
Gendered hierarchies and world order: A critical analysis of the instrumentalization of gender within the UN discourse on gender vulnerability to AIDS
Creators: name: Jenkins, Sara Anne
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2009
Subjects: subject: Health Sciences, Public Health.
subject: Political Science, International Law and Relations.
subject: Gender Studies.

description: This thesis is primarily concerned with the concept of gender. It is interested in gender both insofar as it shapes vulnerability, as well as the degree to which particular understandings of gender are instrumental to the functioning of the current world order. This thesis argues that the UN discourse on gender vulnerability to AIDS is an example of the manner in which gender is instrumentalized and made to support a neoliberal globalized model of development and thus of a neoliberal world order. This argument is based upon a discourse analysis of key UN documents on the topic of gender vulnerability to AIDS which is guided by a critical gendered theoretical framework. While it is clear that no established counter-hegemonic or transformative discourse which would appreciably threaten the status quo is present, the existence of spaces for critique points to the potential for the emergence of sites of resistance within the UN.
'I love teaching but ...': international patterns of teacher discontent
Creators: name: Scott, Catherine
name: Stone, Barbara
name: Dinham, Steve
Publisher: name: Swinburne
Year: 2024

description: This article Research reports the results of research into the career motivation and satisfaction of a sample of over 3,000 teachers and school administrators in four countries: Australia, New Zealand, England, and the USA. Using the participants' own words, we explore the effects on educators of recent international educational change, understood here as a subcategory of more general social trends. Bourdieu's concepts of the Right and Left Hands of the state are used to interpret the experience of teaching in a climate where, while more is expected and demanded of schools, and schools and teachers are scrutinised as never before, educational resources have become scarcer, and the status and image of teaching as a profession has declined.
Apoptosis-Inducing Factor (AIF) forms a complex with Optic Atrophy 1 (Opa1) to maintain mitochondrial structure and function
Creators: name: Pilon-Larose, Karine
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Biology, Neuroscience.

description: The mitochondrial protein Apoptosis-inducing factor (AIF) is a redox active flavoprotein that has a dual role in the regulation of cell death and survival. We have previously identified a novel role for AIF in mitochondrial structure. Here, we examine the mechanism by which AIF controls mitochondrial structure and metabolism and found that AIF deficiency results in mitochondrial fragmentation, cristae malformation and a defect in oxidative phosphorylation. Mitochondrial AIF is essential for organelle fusion as the fission/fusion proteins Mnf1 and dnDrp1 fail to rescue the structural defect seen in AIF deficiency. In contrast, upregulation of Opa1 in AIF deficient neurons restores mitochondrial structure, metabolism and cellular survival. We show that AIF functions upstream of Opa1 because increased mitochondrial AIF cannot rescue neuronal cell death induced by Opa1 deficiency. AIF-deficient neurons display reduced Opa1 oligomerization resulting in impaired cristae formation. Furthermore, we show that AIF interacts with Opa1 to maintain Opa1 oligomerization. This interaction is critical during apoptosis signaling, as Opa1 oligomerization can be preserved by expression of mitochondrial AIF. Apart from AIF, we also identified novel factors that affect the degree of Opa1 oligomerization. Indeed, Opa1 oligomers seem to be modulated by cell metabolism according to levels of NADH and NAD+. These results identify a novel functional interaction between AIF, Opa1 and cell metabolism and links the control of mitochondrial structure with apoptosis signaling and the metabolic state of the cell.
Validation of GeneXpert testing for human papillomavirus and self-collected sampling for cervical cancer screening in Gutu District, Zimbabwe
Creators: name: Yuster Ronoh
name: Some, David
name: Ortuno, Reinaldo
name: Kuziwa Kuwenyi
name: Tapiwa Mupepe
name: Raiva Simbi
name: Manangazira, Portia
name: Caluwaerts, Severine
name: Zibusiso Ndlovu
Publisher: name: F1000 Research Limited
Year: 2020

description: Validation of GeneXpert testing for human papillomavirus and self-collected sampling for cervical cancer screening in Gutu District, Zimbabwe presented at MSF Scientific Days International (London) Medical Research Day, May 13, 2020 by Yuster Ronoh
title: 01_2656
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Behind closed doors: Exploring the gated community in Ontario
Creators: name: Strasbourg, Christina
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Sociology, Criminology and Penology.
subject: Sociology, Social Structure and Development.

description: This study examines the ways in which residents of a Canadian gated community in southern Ontario, Canada socially construct the meaning of both "community" and "safety". In particular, the study examines whether the assumptions and findings on community safety found in the literature on American gated communities apply to similar communities in Canada. Qualitative semi-structured interviews were conducted with four participants to explore the underlying assumptions and stereotypes that participants used in the discussions of community safety. Participants defined a safe community as one that is: homogeneous; excludes strangers and 'others'; provides both physical and social security; built on a sense of community life; and governed by rules and regulations. This study found empirical evidence that helps to validate many of the assumptions in the existing literature: the restriction of access helps residents feel safe; physical infrastructure is needed in order to feel safe; the ability to recognize who is a member of the community makes residents feel safe; and gated communities are viewed by their residents as nostalgic neighborhoods.
Alcohol consumption and breast cancer risk -- Modification by genetic susceptibility
Creators: name: Dennis, Jessica
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Health Sciences, Epidemiology.

description: Gene-environment and gene-gene interactions lie at the root of many human diseases. This thesis evaluated the risk of bias in the case-only design applied to studies of genetic interaction by way of a systematic review and meta-regression analysis. The case-only design was then used to investigate interactions between BRCA gene mutations and alcohol consumption among breast cancer patients, and the results were compared to a case-control analysis of BRCA mutation carriers with and without breast cancer. The systematic review suggests that the case-only design is unbiased when applied to studies of genetic interaction. The case-control analysis found that increasing wine consumption may reduce the risk of breast cancer among BRCA1 mutation carriers, and the results of case-only analysis may be compatible with this. Among BRCA2 mutation carriers, consumption of alcohol other than wine increased breast cancer risk in the case-only analysis while no association was observed in the case-control analysis.
title: L'Héritière de Birague
title: tomes 3-4
titleType: Subtitle
title: L'Héritière de Birague
titleType: AlternativeTitle
Creators: name: Balzac, Honoré De
Publisher: name: Bibliothèque numérique romande
Year: 2020

description: Egalement sur la page de titre: histoire tirée des manuscrits de Dom Rago, ex-prieur de bénédictins mise au jour par ses deux neveux.
Insights into the physics of GRBs from the high-energy extension of their prompt emission spectra
Creators: name: Ravasio, M. E.
name: Ghirlanda, G.
name: Ghisellini, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The study of the high-energy (MeV-GeV) part of GRBs spectrum can play a crucial role in investigating the physics of the prompt emission, but it is often hampered by low statistic and the paucity of GeV observations. In this work, we analyze the prompt emission spectra of the 22 brightest GRBs which have been simultaneously observed by Fermi/GBM and Fermi/LAT, spanning 6 orders of magnitude in energy. The high-energy photon spectra can be modelled with a power-law $N(E)\propto E^{-β}$ possibly featuring an exponential cutoff. We find that, with the inclusion of the LAT data, the spectral index $β$ is softer than what typically inferred from the analysis of Fermi/GBM data alone. Under the assumption that the emission is synchrotron, we derive the index $p\sim2.79$ of the power-law energy distribution of accelerated particles ($N(γ)\propto γ^{-p}$). In 9 out of 22 GRB spectra, we find a significant presence of an exponential cut-off at high-energy, ranging between 14 and 298 MeV. By interpreting the observed cut-off as a sign of pair-production opacity, we estimate the jet bulk Lorentz factor $Γ$, finding values in the range 130-330. These values are consistent with those inferred from the afterglow light curve onset time. Finally, by combining the information from the high-energy prompt emission spectrum with the afterglow lightcurve, we provide a method to derive the distance R from the central engine where the prompt emission occurs. These results highlight the importance of including high-energy data, when available, in the study of prompt spectra and their role in addressing the current challenges of the GRB standard model.
description: 17 pages, 17 figures. Accepted for publication in A&A
Air Traffic Control at Idlewild Airport to Edward R. Hoehl, August 5, 1955
Creators: name: Idlewild Airport
Publisher: name: Unknown
Year: 1955
Subjects: Stony Brook
Airports
Airplanes
Noise pollution
Correspondence
Concerts
Concert halls
Amphitheaters

description: This letter is written by the air traffic control at Idlewild Airport to Edward R. Hoehl on August 5, 1955, in regards to re-routing planes during the time of concerts to control the noise interference.
Chronic oral administration of IL-10-secreting Lactococcus lactis to diabetes-prone rats
Creators: name: Wallace, Timothy David
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2004
Subjects: subject: Chemistry, Biochemistry.

description: Type 1 Diabetes Mellitus (T1D) is an autoimmune disease characterized by the destruction of insulin-producing beta cells in the pancreas. This autoimmune response arises because of poorly understood interactions between genetic and environmental factors. A strong link has been observed between diet and diabetes outcome. There is also evidence that T1D patients exhibit increased gut permeability and inflammation, characterized by a Th1 cytokine bias. This suggests that T1D may be gut-related. Oral delivery of IL-10-secreting bacteria has been shown to counteract Th1-mediated colitis in mice. To test whether a similar treatment might affect diabetes development, diabetes-prone BB (BBdp) rats were gavaged daily with 2 x109 CFU of mIL-10-secreting Lactococcus lactis pTRmIL-10. Treatment was initiated at ∼26 days and terminated at 160 days or upon diagnosis of diabetes, after which animals were sacrificed. (Abstract shortened by UMI.)
Efficient method for the computation of parasitic coupling in microwave integrated circuits
Creators: name: McPhee, Dave
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Engineering, Electronics and Electrical.

description: Higher integration and smaller layout size, two major trends in today's industry, lead to more prominent parasitic electromagnetic coupling effects in high-frequency communication systems. Using network theory concepts and de-embedding techniques, this thesis presents a fast and efficient method to model such coupling in microwave integrated circuits, making the design more reliable. The efficiency of the new technique is demonstrated through examples of circuit simulations and circuit optimization.
Bembism and motivicity in the madrigals of Willaert's "Musica nova"
Creators: name: Parkes, Erin
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Music.

description: In Venice in the mid-sixteenth-century, the madrigal was emerging as the highest musical expression of poetry. One of the foremost composers of this new genre was Adrian Willaert. The madrigals contained in his Musica nova for many are the pinnacle of the Italian madrigal. It has been suggested that Willaert's settings of Petrarch's poetry in this collection may have been influenced by the writings of Pietro Bembo, who was active in Venice in the first half of the sixteenth-century. It has also been suggested that Willaert used a compositional tool called motivicity in many of his works. The purpose of this study is to determine whether or not Willaert used motivicity as a method of composition in order to highlight the principles put forward by Pietro Bembo for Petrarch's sonnets. The results demonstrate that while in some madrigals it does appear that Willaert used motivicity in order to adhere to Bembist ideals, it was not always a determining factor.
Tuning spinaron and Kondo resonances via quantum confinement
Creators: name: Aapro, Markus
name: Kipnis, Abraham
name: Lado, Jose L.
name: Kezilebieke, Shawulienu
name: Liljeroth, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Controlling zero bias anomalies in magnetic atoms provides a promising strategy to engineer tunable quantum many-body excitations. Here we show how two different quantum impurities featuring spinaron and Kondo excitations can be controlled via quantum confinement engineering by using circular quantum corrals on a Ag(111) surface. In corrals built from both Ag and Co adatoms, the width of the zero bias anomaly in the central Co adatom oscillates as a function of corral radius with a period of half of the Ag(111) surface state wavelength. Parameters extracted for Co/Ag(111) show only small differences in extracted spinaron zero-bias anomaly between corral walls built from Ag or Co adatoms. In quantum corrals occupied with metal-free phthalocyanine, a $S=1/2$ Kondo system, we observe notable changes in the zero bias anomaly lineshape as a function of corral radius. Our results offer insight into many-body Kondo and spinaron resonances where the electronic density is controlled by confinement engineering.
Optimization of ADCP and GPS position and velocity measurements using a Kalman filter
Creators: name: Kashyap, Shalini
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2007
Subjects: subject: Engineering, Civil.

description: This study optimized and evaluated a Kalman filter to improve measurements of boat velocity, boat position, apparent bedload velocity and water discharge using inputs of Stand Alone Global Positioning System (GPS) VTG (Doppler velocity) and GGA (triangulated position) and Acoustic Doppler Current Profiler (aDcp) bottom tracking (Doppler sonar). The filter significantly (alpha<0.05) improved mean velocity errors compared to Stand Alone GGA. Kalman filter velocity errors were lower than Stand Alone VTG velocity errors, but differences were rarely significant. Improvements were seen in mean position errors, although for low bedload transects, care was needed when using the Kalman velocity filter. The Kalman filter usually showed the lowest mean bedload biases, although biases were all very close ranging from -1.7 cm/s to 1.25 cm/s. The filter did not always show the lowest errors for discharge although it did show the least variability compared to each of the input signals.
Accelerating Quadratic Transform and WMMSE
Creators: name: Shen, Kaiming
name: Zhao, Ziping
name: Chen, Yannan
name: Zhang, Zepeng
name: Cheng, Hei Victor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Fractional programming (FP) arises in various communications and signal processing problems because several key quantities in the field are fractionally structured, e.g., the Cramér-Rao bound, the Fisher information, and the signal-to-interference-plus-noise ratio (SINR). A recently proposed method called the quadratic transform has been applied to the FP problems extensively. The main contributions of the present paper are two-fold. First, we investigate how fast the quadratic transform converges. To the best of our knowledge, this is the first work that analyzes the convergence rate for the quadratic transform as well as its special case the weighted minimum mean square error (WMMSE) algorithm. Second, we accelerate the existing quadratic transform via a novel use of Nesterov's extrapolation scheme [1]. Specifically, by generalizing the minorization-maximization (MM) approach in [2], we establish a nontrivial connection between the quadratic transform and the gradient projection, thereby further incorporating the gradient extrapolation into the quadratic transform to make it converge more rapidly. Moreover, the paper showcases the practical use of the accelerated quadratic transform with two frontier wireless applications: integrated sensing and communications (ISAC) and massive multiple-input multiple-output (MIMO).
description: 15 pages
Measles deaths in the current Democratic Republic of Congo epidemic: estimates from four population-based surveys
Creators: name: Gignoux, Etienne
name: Ale, Franck
name: Givo, Yves Katuala
name: Peyraud, Nicolaus
name: Duc, Geraldine
name: Gaubert, Laurence
name: Jean-Clément Cabrol
name: Iza Ciglenecki
name: Brahima Toure
name: Cohuet, Sandra
name: Grellety, Emmanuel
name: Roederer, Thomas
name: Llosa, Augusto
name: Luquero, Francisco
name: Abou-Chaar, Ghassan
name: Saim, Malika
name: Baelongandi, Felix
name: Monga, Yves
Publisher: name: F1000 Research Limited
Year: 2020

description: Measles deaths in the current Democratic Republic of Congo epidemic: estimates from four population-based surveys presented at MSF Scientific Days International (London) Medical Research Day, May 13, 2020 by Etienne Gignoux
"L'Union fait la force?": La concurrence comme élément déterminant de l'évolution de l'Union Saint-Joseph du Canada (1863--1920)
Creators: name: Labbé, Pierrick
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2007
Subjects: subject: History, Canadian.

description: Cette thèse aborde le sujet de la concurrence entre l'Union Saint-Joseph du Canada et les sociétés de secours mutuels canadiennes-françaises, entre sa fondation en 1863 et l'atteinte de sa solvabilité actuarielle en 1920. Au départ, cette petite association locale avait pour objectif d'offrir une protection en cas de mort ou de maladie aux travailleurs canadiens-français d'Ottawa. L'arrivée de nouvelles sociétes de secours mutuels locales et succursales de sociétés fraternelles dans la ville changea le statut de l'association qui n'était plus la seule à vouloir recruter les Canadiens français dans ses rangs. Au début des années 1890, le recrutement devint de plus en plus difficile, au point de menacer sa stabilité financière. C'est en s'inspirant des sociétés fraternelles que l'Union Saint-Joseph d'Ottawa trouva une solution à cette crise. Une structure administrative de type fédéral fut mise sur pied afin de permettre à l'organisation d'étendre ses activités hors des limites de la ville. Cette société de secours mutuels passa rapidement d'une simple association locale de travailleurs à une grande societe nationale, avec des ramifications dans plus de six cents communautés canadiennes-françaises du Canada et des États-Unis. Cette nouvelle structure administrative transforma le caractère originel de l'organisation en diminuant la démocratie participative, caractéristique importante de sa gestion avant 1895. Cette situation donnait une grande partie du pouvoir décisionnel à l'élite dirigeante. Ainsi, l'organisation perdit sa vocation de bienfaisance au profit d'une gestion économique plus proche des valeurs actuarielles. Cependant, grâce à sa mission sociale imprégnée d'un catholicisme social et d'un nationalisme canadien-français, elle attira plus de 25000 Canadiens français à participer à ses activités. Ainsi, durant les années 1910, l'Union Saint-Joseph était devenue une association nationale, luttant pour l'autonomie économique des Canadiens français. Parfois, ses actions dépassaient le secteur économique. Par exemple, son réseau de succursales permit de joindre bon nombre de Canadiens français afin de les réunir pour former ce qui allait devenir l'Association canadienne-française d'éducation d'Ontario.
Entretien de Muhammad al-Rawad auprès de Naïm Qalil al-Shamari à propos du vieux marché de Ma'an
Creators: name: al-Shamari, Naïm Qalil
name: Muhammad Al-Rawad (Enquêteur)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: Source: http://www.calames.abes.fr/pub/ms/FileId-3139
description: Coverage: Ma'an, Jordanie
Copper-nickel-platinum group element mineralization and petrogenesis of mafic-ultramafic intrusions in the western Quetico and Wabigoon Subprovinces, northwestern Ontario, Canada
Creators: name: Pettigrew, Neil Thomas
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2004
Subjects: subject: Geology.
subject: Biogeochemistry.

description: This project focused on Cu-Ni-PGE mineralization and petrogenesis of mafic-ultramafic intrusions in the western Quetico and Wabigoon Subprovinces of the Superior Province. Two intrusions were singled out for detailed study: the Legris Lake Complex, part of circular series of mafic-ultramafic complexes, which includes the Lac des Iles Complex, located in the Wabigoon Subprovince, and the Samuels Lake Intrusion, part of the Quetico Intrusions, located in the Quetico Subprovince. Legris Lake complex. The Legris Lake Complex is a northeast-trending 7.3 by 3.5 kilometre mafic-ultramafic intrusive complex. It is part of a circular series of mafic-ultramafic complexes, the most notable of which is the Lac des Iles Complex, which is host to Canada's only palladium mine. The Legris Lake Complex consists of mostly gabbroic rocks, but also contains lithologies ranging from anorthosite to wehrlite, and, variety of igneous breccias. The gabbroic rocks vary from melanogabbro to porphyritic leucogabbro. Medium grained, massive, biotite-rich leucogabbro is the predominant exposed variety and probably caps the complex. Samuels Lake intrusion. The Samuels Lake intrusion, ca 2688 +6/-5 Ma, located in the centre of the Quetico Subprovince possesses a northeast-southwest elliptical form (500 m by 250 m) and displays rough concentric zoning with a wehrlite core grading into clinopyroxenite border zone, which has been intruded by later homblendite. Olivine-rich rocks commonly contain blebs of pyrrhotite + chalcopyrite + pentlandite with anomalous PGE values, ranging from 50 to 300 ppb, whereas the clinopyroxenite border zone contains disseminated to blebby PGE-rich Cu-sulphide mineralization. (Abstract shortened by UMI.)
Suppression of polaron self-localization by correlations
Creators: name: Zschetzsche, Lilith
name: Zillich, Robert E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate self-localization of a polaron in a homogeneous Bose-Einstein condensate in one dimension. This effect, where an impurity is trapped by the deformation that it causes in the surrounding Bose gas, has been first predicted by mean field calculations, but has not been seen in experiments. We study the system in one dimension, where, according to the mean field approximation, the self-localization effect is particularly robust, and present for arbitrarily weak impurity-boson interactions. We address the question whether self-localization is a real effect by developing a variational method which incorporates impurity-boson correlations non-perturbatively and solving the resulting inhomogeneous correlated polaron equations. We find that correlations inhibit self-localization except for very strongly repulsive or attractive impurity-boson interactions. Our prediction for the critical interaction strength for self-localization agrees with a sharp drop of the inverse effective mass to almost zero found in quantum Monte Carlo simulations of polarons in one dimension.
description: 12 pages, 5 figures
Understanding organizational context for the evaluation of training outcomes: A multi-site case study in the community mental health sector
Creators: name: Tsarouhas, Afroditi
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2004
Subjects: subject: Health Sciences, Mental Health.
subject: Education, Guidance and Counseling.

description: The evaluation of training models has evolved from Kirkpatrick's (1959) four level model and Brinkerhoff's (1987) six stages of effective human resource development to Guskey's (2000) five critical levels of professional development. This evolution responds to the changing needs of organizations. Analyses of organizational contexts is gaining in importance given that these analyses point to the specific aspects of organizations which require attention to enhance the likelihood that training outcomes will be successfully implemented (Bennett, Lehman & Forst, 1999). The study formally tests the factors outlined in the third level (organizational support and change) of Guskey's (2000) model. These factors make up the conceptual framework in order to explore and assess the contextual congruence of organizational context to determine whether the current context is conducive to the successful implementation of training outcomes. The study further examines the applicability of Guskey's (2000) third level factors outside educational settings as well as other relevant factors that may not have been considered. Guskey's (2000) third level factors are partially tested to ascertain whether they are adaptable within the community mental health sector. (Abstract shortened by UMI.)
Tethered polymers in a shear flow: A molecular dynamics study of the good and bad solvent cases
Creators: name: Gratton, Yannick
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Chemistry, Polymer.
subject: Physics, Molecular.

description: Nanotechnology is now a reality although it is still very much in its infancy. This being said much work still needs to be done. During the last past few decades, new experimental tools such as videomicroscopy and optical tweezers, which allow us to both visualize and manipulate in real time the dynamics of macromolecules, have emerged. These two tools alone provide endless possibilities. For example, it is now possible to tether a polymer at one end with optical tweezers while a constant flow of solvent extends it. If the chain is fluorescently labeled, dynamical properties can be extracted via videomicroscopy. In this thesis, we study a similar problem. With the help of Molecular Dynamics (MD) simulations, we examine the physics of a Freely Jointed Chain (FJC) tethered by one end to a hard surface while being submitted to a Poiseuille flow. A good solvent is used during the first part of this thesis, while for the second part, we look at the dynamics of the chain in poor solvents. In both cases, we compare actual stretching theories to our simulation data and extract the effects of Hydrodynamic Interactions (HI). For good solvents, we propose a new empirical equation which relates the unstretched fraction of the chain to the full range of shear rates. We also observe a peculiar cyclic motion of the chain which was first reported experimentally. For poor solvents, we study the collapsed chain properties while changing the strength of the shear flow linearly in time. A novel hysteretic effect for the chain extension as a function of shear rate is observed in our simulations.
Investigating an antiracism policy: The case of an Ontario school board
Creators: name: Parris, Sandra
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Education, Administration.

description: How are the issues of racism, antiracism and the antiracism policy development process understood and discussed at the school board level? What is the relationship between antiracism policy makers' personal experiences of racism and their involvement in the antiracism policy process? How do antiracism policy makers' understandings of racism and antiracism affect their participation in the antiracism policy process? This case study uses a humanistic and narrative mode of inquiry to examine the preceding questions. This particular mode of inquiry emphasizes (a) the role of the individual in the organization and in the antiracism policy making process, in particular, (b) how the individual affects the way in which organizations work; (c) and the existence of contested meanings and understandings of how to define the theoretical aspects of antiracism approaches and the idea of race and racialization as lived experience. Seven individuals who participated in the Ontario School Board (OSB) antiracism policy process were interviewed and asked to discuss their personal understandings of racism, antiracism and the antiracism policy development process. Findings indicate that (a) there are underlying racialized assumptions that play a formative role in the OSB antiracism and ethnocultural equity policy development process, (b) participation in the policy process is often motivated by the participant's personal experiences and interests, (c) and that organizational structures may simultaneously foster and hinder the creation and subsequent enactment of antiracism policy. Analyzing participant understandings of racism, antiracism, and the antiracism policy development process raises awareness of the complex nature of social, organizational and to a lesser extent, micro- and macro-political conditions that are central to antiracism policy development and implementation.
title: Bonjour
title: Journal communal d'Yverdon-les-Bains
titleType: Subtitle
title: Bonjour
titleType: AlternativeTitle
Creators: name: Municipalité D'Yverdon-Les-Bains
Publisher: name: Municipalité d'Yverdon-les-Bains
Year: 2004

description: Le numéro 84 (juin 2017) porte le titre: Au revoir!