cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase Shifting Surface (PSS) and Phase and Amplitude Shifting Surface (PASS) for Microwave Applications
Creators: name: Gagnon, Nicolas
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: lens antennas
microwave antennas
printed lens antennas
phase shifting surface
phase and amplitude shifting surface
gratings
antenna radiation pattern synthesis
phase control
antenna beam shaping
flat-topped beam antenna
aperture amplitude and phase control

description: This thesis describes an electrically thin surface used for electromagnetic applications in the microwave regime. The surface is free-standing and its primary purpose is to modify the phase distribution, or the phase and amplitude distribution of electromagnetic fields propagating through it: it is called phase shifting surface (PSS) in the first case, and phase and amplitude shifting surface (PASS) in the second case. For practical applications, the surface typically comprises three or four layers of metallic patterns spaced by dielectric layers. The patterns of the metallic layers are designed to locally alter the phase (and amplitude in the case of the PASS) of an incoming wave to a prescribed set of desired values for the outgoing wave. The PSS/PASS takes advantage of the reactive coupling by closely spacing of the metallic layers, which results in a larger phase shift range while keeping the structure significantly thin. The PSS concept is used to design components such as gratings and lens antennas which are presented in this document. The components are designed for an operating frequency of 30 GHz. The PSS phase grating gives high diffraction efficiency, even higher than a dielectric phase grating. Several types of lens antennas are also presented, which show comparable performance to that of a conventional dielectric plano-hyperbolic lens antenna with similar parameters. The PASS concept is used in a beam shaping application in which a flat-topped beam antenna is designed. This work demonstrates the potential for realising thin, lightweight and low-cost antennas at Ka band, in particular for substituting higher-gain antenna technologies such as conventional dielectric shaped lens antennas.
Personal-portable Cooling Garment Based on Adsorption Vacuum Membrane Evaporative Cooling
Creators: name: Yang, Yifan
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: adsorption
evaporative cooling
personal microclimate cooling

description: A cutting edge man-portable AVMEC cooling garment was demonstrated to be able to provide sufficient cooling for personnel working at mediate activity loads. Studies were first carried out in a well controlled vacuum desiccator at room temperature to elucidate the effects of several key parameters on the performance of an AVEC device, which was similar to AVMEC except that membrane was not involved. Under the best condition, an average cooling capacity of 179 W/M2 was achieved in a period of four hours and cooling continued at a slowly declining rate for another four hours afterward. The temperature of water was maintained at approximately 12.5 oC after the pseudo steady state was established. Then, it was shown that the AVMEC cooling pads were able to provide a cooling capacity of 277.4 W/m2 in a 37 oC ambient environment (incubator). The temperature of the cooling core surface was maintained in a range of 20 – 21.8 oC in the one-hour test period. No power supply was required except for the initialization stage, which took 5 minutes. Furthermore, human subject tests with or without wearing NWBC (Nuclear Warfare Biological and Chemical) suit demonstrated that, a AVMEC garment composed of 12 cooling pads were able to maintain the core body temperature of the subjects below 38.5 oC for up to 90 minutes while the subject was walking on a treadmill at a speed of 2 miles per hour in an environment of 40 oC and 50% RH (relative humidity). These results indicate that the AVMEC garment is a promising man-portable personal cooling technology.
Role of Angiotensin II, Glutamate, Nitric Oxide and an Aldosterone-ouabain Pathway in the PVN in Salt-induced Pressor Responses in Rats
Creators: name: Gabor, Alexander
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: Aldosterone
Ouabain
angiotensin II
glutamate
nitric oxide
paraventricular nucleus
hypertension
Dahl salt sensitive rat

description: High salt intake contributes to the development of hypertension in salt-sensitive humans and animals and the mechanistic causes are poorly understood. In Dahl salt-sensitive (S) but not salt-resistant (R) rats, high salt diet increases cerebrospinal fluid (CSF) [Na+] and activates an aldosterone-mineralocorticoid receptor-epithelial sodium channel-endogenous ouabain (MR-ENaC-EO) neuromodulatory pathway in the brain that enhances the activity of sympatho-excitatory angiotensinergic and glutamatergic pathways, leading to an increase in sympathetic nerve activity (SNA) and blood pressure (BP). We hypothesize that high salt diet in Dahl S rats enhances Ang II release in the paraventricular nucleus (PVN), causing a decrease in local nitric oxide (NO) action and an increase in local glutamate release thereby elevating SNA, BP and heart rate (HR). The present study evaluated the effects of agonists or blockers of MR, ENaC, EO, nitric oxide synthase (NOS) or glutamate and AT1-receptors on the BP and HR responses to acute infusions of Na+ rich aCSF, intracerebroventricularly (icv), or in the PVN of Dahl S, R or Wistar rats or to high salt diet in Dahl S and R rats. In Wistar rats, aldosterone in the PVN enhanced the BP and HR responses to infusion of Na+ rich aCSF in the PVN, but not in the CSF, and only the enhancement was prevented by blockers of MR, ENaC and EO in the PVN. AT1-receptor blockers in the PVN fully blocked the enhancement by aldosterone and the responses to infusion of Na+ rich aCSF icv, or in the PVN. Na+ rich aCSF in the PVN caused larger increases in BP and HR in Dahl S vs. R rats and the responses to Na+ were fully blocked by an AT1-receptor blocker in the PVN. BP and HR responses to a NOS blocker in the PVN were the same, but L-NAME enhanced Na+ effects more in Dahl R than S rats. High salt diet attenuated increases in BP from L-NAME in the PVN of Dahl S but not R rats. AT1 and glutamate receptor blockers candesartan and kynurenate in the PVN decreased BP in Dahl S but not R rats on high salt diet. At the peak BP response to candesartan, kynurenate in the PVN further decreased BP whereas candesartan did not further decrease BP at the peak BP response to kynurenate. Our findings indicate that both an acute increase in CSF [Na+] and high salt intake in Dahl S rats increases AT1-receptor activation and decreases NO action in the PVN thereby contributing to the pressor responses to Na+ and presumably, to dietary salt-induced hypertension. The increased BP response to AT1-receptor activation in the PVN of Dahl S is mediated by enhanced local glutamate receptor activation. An MR-ENaC-EO pathway in the PVN can be functionally active and further studies need to assess its role in Dahl S rats on high salt intake.
Effects of severity versus probability of a negative consequence on women's assertiveness.
Creators: name: Andrews, Dorothy Lynn.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1993
Subjects: subject: Psychology, Clinical.

description: Two studies were designed to test the hypothesis that the severity of an anticipated negative consequence deters women's assertiveness more than the probability of an anticipated consequence. The first study, involving a 2 x 2 factorial design, manipulated two levels of anticipated severity (low versus high) and two levels of anticipated probability (low versus high). The type of response studied involved the refusal of an unreasonable request. Female undergraduate psychology students (N = 198) were randomly assigned to view one of four videotapes reflecting these conditions. After viewing the videotapes, participants were asked to rate their intentions to act assertively (BI) and to rate other variables which could potentially be coeffects or mediators of BI (e.g., anxiety, competence). In study 2, 151 female psychology students completed a survey in which they were required to imagine their own anticipated negative consequences, severities, and probabilities for five vignettes involving the refusal of an unreasonable request. Participants in study 2 completed questions about similar variables to study 1. Personality variables, including social desirability, assertiveness (for studies 1 and 2), and anxiety (for study 2) were measured to see if they moderated the results. Path models showed that in all cases, severity and probability affected BI, either directly or indirectly through distress/low self-efficacy or unfairness/need for support. The hypothesis was mostly confirmed in that in almost all cases, severity contributed more variance to BI than did probability. All personality factors moderated the results some of the time. Support was found for both the rational choice and cognitive distortion models of assertiveness. The results were discussed in reference to Beck et al.'s (1985) theory of social anxiety and implications for assertiveness training.
Extended performance reporting: evaluating corporate social responsibility and intellectual capital management
Creators: name: Guthrie, James
name: Cuganesan, Suresh
name: Ward, Leanne
Publisher: name: Swinburne
Year: 2024

description: Recent corporate scandals have resulted in heightened attention towards the shortcomings of traditional financial reporting frameworks. Concurrently, the rise of the corporate social responsibility imperative has led to criticisms that financial reports present an incomplete account of a firm’s activities. In addition, growing acknowledgement of the importance of a firm’s intangibles and intellectual capital has been associated with increased commentary about the need for extra disclosures if a more complete picture of the firm’s value is to be provided to external stakeholders. This paper responds to these concerns by developing an extended performance reporting framework to the Australian Food and Beverage Industry, which is characterised by both corporate social responsibility and intellectual capital issues. In relation to the latter, this framework presents a novel attempt to develop an industry-customised framework as called for by both industry bodies and researchers in the area.
Tests of Bivariate Stochastic Order
Creators: name: Liu, Yunfeng
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: bivariate stochastic order
Kendall statistic
Spearman statistic
bivariate Mann Whitney Wilcoxon statistic

description: The purpose of this thesis is to compare rank-based tests of bivariate stochastic order. Given two bivariate distributions $F$ and $G$, the general problem we are dealing with is to test $H_0: F=G$ against $H_1:F
Polyhedral Boranes and Carboranes as Versatile Species Employed in the Pursuit of Imaging Methods and of Nanostructured Materials
Creators: name: Michel, Sheila
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: carborane
decaborane
boron nitride

description: Polyhedral boranes and carboranes have acquired their popularity for constructing meso and nano-size structures for an array of applications from pharmaceuticals to material science. These three-dimensional boranes range from 4 to 22 boron atom per molecules with delocalized bonding analogous to aromatic compounds. The unique vibrational spectroscopy of the BH function allows for possible application of these species to bioimaging. Silver nanoparticles functionalized with ortho-carboranes have been reported for bioimaging using Surface-enhanced Raman scattering (SERS). The silver nanoparticles were functionalized with antibodies specific to cancer cell receptors. Bonding thiol-substituted carboranes to these particles allowed for observation of enhanced Raman signals as the imaging mode. Here, attempts to synthesize second generation carborane molecules with additional Raman-active group such as nitrile were conducted. Hybrid diblock copolymers have the ability to self-assemble in different morphological patterns depending on the type and ratio of monomers and the compatibilities in various solvents. Linear hybrid diblock copolymers were synthesized by ring-opening metathesis polymerization (ROMP) reactions with norbornenyl-based decaborane and various amounts of norbornene and norbornenyl-ester derivative monomers. Their self-assembly behaviour in various solvents were characterized by NMR, TGA, DSC, and SEM. P(norbornene)60-b-p(norbornenyl-decaborane)40 polymers showed lamellar morphology patterns when slowly evaporated from chloroform. Based on results and the SEM images, a few of these diblock copolymers were used as ceramic precursors and pyrolyzed to elevated temperatures forming boron nitride and boron carbonitride nano-ordered ceramics
Studying the Effect of Low Doses of Ionization Radiation on Senescence in Human Lung Fibroblasts.
Creators: name: Kabilan, Usha
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: Radiation Hormesis
Ionization Radiation
Low Dose Radiation
Aging
DNA repair

description: The exposure to high doses of ionizing radiation (>5Gy) is unequivocally associated with increased cancer risk. However, there is substantial experimental evidence showing that in response to low doses of ionizing radiation (LDR: <100mGy), cells and organisms are benefitted with delayed ageing, improved immunity and reduced cancer growth. These intriguing findings have proposed the “Radiation Hormesis” hypothesis. Herein, I studied the senescence effects of LDR exposure to normal human HFL1 cells and examined transcriptional changes. I found that HFL1 cells exposed to 10 mGy of gamma radiation had delayed senescence measured at 12 weeks post-irradiation compared to unirradiated cells. Through qPCR array analysis, I found that genes involved in human cellular senescence functions are differentially regulated in 10 mGy exposed cells at 12 weeks compared to 1-week post-exposure. A nucleolar protein, SIRT7, that belongs to the family of proteins called Sirtuins with known roles in aging, was found to be upregulated transcriptionally in LDR-exposed HFL1 cells. Knocking out SIRT7 protein significantly accelerated senescence in HFL1 cells suggesting a direct role of SIRT7 in the deceleration of senescence and potentially in mediating radiation hormesis. Furthermore, overexpression of the HRAS oncogene strongly accelerated senescence in HFL1 cells through gene expression of cell cycle regulators and checkpoint proteins. Together, my studies revealed that LDR induces unique transcriptional changes resulting in a potentially radio adaptive protective cellular response. I also discuss the HRAS overexpression system as a time-efficient cellular model that could be used to more rapidly study the effect of LDR on senescence using primary cultures.
Predicting Suitable Habitats of Camptotheca acuminata Considering Both Climatic and Soil Variables
Creators: name: Feng, Lei
name: Sun, Jiejie
name: Shi, Yuanbao
name: Wang, Guibin
name: Wang, Tongli (Forest Geneticist)
Publisher: name: Multidisciplinary Digital Publishing Institute
Year: 2020

description: Camptotheca acuminata is considered a natural medicinal plant with antitumor activity. The assessment of climate change impact on its suitable habitats is important for cultivation and conservation. In this study, we applied a novel approach to build ecological niche models with both climate and soil variables while the confounding effects between the variables in the two categories were avoided. We found that the degree-days below zero and mean annual precipitation were the most important climatic factors, while the basic soil saturation, soil gravel volume percentage, and clay content were the main soil factors, determining the suitable habitats of C. acuminata. We found that suitable habitats of this species would moderately increase in future climates under both the RCP4.5 and RCP8.5 climate change scenarios for the 2020s, 2050s, and 2080s. However, substantial shifts among levels of habitat suitability were projected. The dual high-suitable habitats would expand, which would be favorable for commercial plantations. Our findings contribute to a better understanding of the impact of climate change on this species and provide a scientific basis for the cultivation and conservation purposes.
Domain specific language (DSL) platform for knowledge management
Creators: name: Ryan, Stephen
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: Embedded within a broader platform initiative in collaboration with the Confirm research center for Smart Manufacturing, this research explores aspects of the knowledge alignment in the business decisions in an Industry 4.0, context, with attention to supporting better, holistic decisions, especially concerning the consideration of sustainability and risk. The overarching project's goal in which this research is embedded was to establish a cohesive framework to address the complex challenges of a Digital Thread connecting all the aspects of data, processes and compliance in Smart Manufacturing scenarios. Within this context, this thesis focuses on the development of a service-oriented Domain Specific Language (DSL) platform for improved knowledge management and exploitation within the evolving landscape of the Digital Thread demonstrators. This research addresses the pressing need for a tailored solution to better informed decision makers of different backgrounds and competences, by introducing a platform that uses the domain specific vocabulary of the stakeholders, and holistically integrates risk management and sustainability considerations into knowledge management practices. Introducing a guiding methodology and then a DSL supporting it through an extensible IT platform, we help organisations mitigate risks and promote sustainability within their organizational processes. The platform aims to streamline and optimize the complexities associated with managing information, enabling organizations to scope and conduct operations more efficiently and with greater foresight. Key features of the DSL platform include specialized modules dedicated to risk assessment and sustainability, this way helping organizations to align with global sustainability goals. The DLS includes a collection of processes and workflows that guide the orchestration of the collaboration between responsibles of typically different groups within a company and organization, it provides fully implemented processes for the combined aspects of sustainability and risk, it provides an extensible collection of implemented service-oriented building blocks for the core functionalities in this platform, and a fully implemented specialized application for an SME. The methodology has been validated in a series of workshops with responsibles of research centers and collaborative projects. The central challenge addressed here and the proposed solution through the extensible DSL platform are however more general than just considering sustainability and risk: the methodology is applicable also to other pervasive concerns like compliance or innovation. Its relevance transcends its mere technological implementation; it fosters a collective perspective, provides processes guiding the interactions, and includes models like SWOT analysis and canvasses that address aspects like quality, customer perception, and margins, intricately woven into the tapestry of "systems of systems."
Entrepreneurship, holism and technological innovation: theory conflicts in lessons from spin-off companies
Creators: name: Yencken, John
name: Gillin, Murray
Publisher: name: Swinburne
Year: 2024

description: Entrepreneurship scholars have described entrepreneurship as a holistic process. This has presented conceptual difficulties in the analysis of technological innovation, particularly the development process of new high-tech small firms, such as spin-offs from public research agencies. The paper first discusses the concept of holism and reviews the analytical and dialectical philosophy literature to establish possible tests for holism, and next reviews the constructs of entrepreneurial orientation and entrepreneurial capacity with the extension of Penrose growth theory to entrepreneurial ventures. Data from case studies of companies spun-off by universities and other public agencies have been used to explore the relevance of holism and the other constructs as defined to the study of new technology-based firms (NTBF). The implications of these findings for the generation of new high-growth companies were also explored.
La communication dans la prise en charge intégrée de l'autisme
Creators: name: Antoine, Marie Dominique
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: Autisme
Communication
Prise en charge
Intégration
Médecine conventionnelle
Médecine alternative

description: L’autisme est un problème complexe qui confronte autant les patients, leurs parents que les différents intervenants de la santé engagés dans sa prise en charge. La coordination entre ces différents acteurs, en terme de communication (au sens d’échanges, de relations, d’interactions, de partage de connaissances, etc.) nous semble nécessaire pour une prise en charge efficace. Toutefois, en dépit du fait que le système de santé canadien soit bien régulé, lors de la prise en charge des enfants autistes, les approches conventionnel et alternatif fonctionnent parallèlement ou en complémentarité, en dehors des normes, sans communication entre eux, avec les parents comme seul lien. Ainsi, nous avons étudié comment s’établit la communication entre ces différents acteurs au sein du système de santé à Ottawa pour potentiellement observer si une prise en charge intégrée des enfants autistes est possible dans notre système de santé.
Time Courses of Proprioceptive Recalibration and Reach Adaptation to a Visuomotor Distortion
Creators: name: Zbib, Basel
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: Reach adaptation
Proprioceptive recalibration
Time course
Motor learning

description: When subjects are presented with distorted visual feedback of their hand during a goal-directed movement (i.e. subjects view a cursor representing their hand that is rotated from their hand’s actual position while reaching in a virtual reality environment), they typically adapt their movements so that the cursor is brought to the target, thus reducing reaching errors. In addition to motor adaptation, it has recently been shown that reaching with distorted visual feedback of the hand results in sensory changes, such that proprioceptive estimates of hand position are shifted in the direction of the visual feedback (Cressman and Henriques 2009). The current study looked to establish how quickly these sensory changes arise while training to reach with distorted visual feedback of the hand. Additionally, by comparing sensory to motor changes across time, we looked to determine the relationship between their underlying processes. Subjects trained to reach to a single visual target while seeing a cursor that was aligned with their actual hand position (50 trials: aligned reach training), or rotated 30° clockwise (CW) relative to their actual hand position (150 trials: rotated reach training). Reach errors and proprioceptive estimates of felt hand position were assessed following the aligned reach training trials and at 7 different times during the rotated reach training trials by having subjects reach to the target without visual feedback, and provide estimates of the position of their hand relative to a visual reference marker respectively. Results revealed a slow change in proprioceptive estimates over the course of reach training with the rotated cursor relative to estimates after the aligned reach training, and in fact, significant sensory changes were not observed until after 70 trials. In contrast, reach adaptation showed a much steeper increase and significant adaptation after a limited number of reach training trials with a rotated cursor. These different time courses suggest that proprioceptive recalibration and reach adaptation arise due to separate neural processes.
Features of non-Boussinesq convection flows and their relevance to industrial applications
Creators: name: Suslov, Sergey
Publisher: name: Swinburne
Year: 2024

description: Flows caused by high-temperature (the so-called non-Boussinesq) convection play the major role in many industrial applications such as thermal insulation systems (nuclear reactors, heat generation stations), chemical vapour deposition (CVD) reactors for manufacturing electronic materials etc. The geometry of these applications is relatively simple, so that a parallel-wall channel or enclosure are the most common prototype configurations. Yet the arising flows exhibit complicated dependence on a large number of parameters such as the Reynolds number characterising the strength of a through-flow, Grashof number representing buoyancy effects and the temperature difference in the flow domain which affects fluid transport properties. As a result of strong nonlinearity of the governing equations, multiple flow patterns can exist for the same set of parameters. Which of the possible flow pattern sets in reality depends on initial conditions and, most importantly, for a certain range of the governing parameters, this can be controlled by a weak external excitation (e.g. by sound emitted from a speaker). This provides the way of externally influencing such practically important system characteristics as efficiency of thermal insulation, heat and mass transfer rates, chemical deposition rate and the uniformity of deposition. This talk will provide an overview of the major physical properties of high temperature convection-dominated flows closely relevant to industrial applications.
Analysis of Laminated Sediments from Lake DV09, Northern Devon Island, Nunavut, Canada
Creators: name: Courtney Mustaphi, Colin
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2009
Subjects: Little Ice Age
Medieval Warm Period
Canadian Arctic
lake sediment
varve
Devon Island
climate
paleoclimate

description: A 147cm sediment core from Lake DV09, northern Devon Island, Nunavut, Canada (75° 34’34”N, 89° 18’55”W) contains annually-laminated (varved) sediments, providing a 1600-year record of climate variability. A minerogenic lamina deposited during the annual thaw period and a thin deposit of organic matter deposited during the summer and through the winter, together form a clastic-organic couplet each year. The thinnest varves occur from AD800-1050, and the thickest from AD1100-1300, during the Medieval Warm Period. The relative sediment density is also highest during this period suggesting increased sediment transport energy. The coldest period of the Little Ice Age appears to be during the AD1600s. Varve widths over the past century indicate climate warming in the region.
description: This research program was funded by the Natural Sciences and Engineering Research Council of Canada (NSERC), and the Canadian Foundation for Climate and Atmospheric Sciences (CFCAS). A tuition bursary from Ultramar Inc. also helped in making this research possible. Logistical support was provided by the Polar Continental Shelf Project (PCSP Contribution number 04508).
The Effects of Competition and Ecological Opportunity on Adaptation and Diversification
Creators: name: Bailey, Susan F.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2013
Subjects: experimental evolution
adaptation
diversification
resource competition
ecological opportunity
Pseudomonas fluorescens
genomics
synonymous mutations

description: Ecological processes have the potential to influence evolution through their effects on selection. This thesis explores the effects of two ecological factors - competition and ecological opportunity. Intraspecific (within-species) competition is often expected to drive adaptation and diversification by increasing selection for the use of novel resources, thereby alleviating the detrimental effects of competition. However, this is not always the expected outcome; theory suggests that intraspecific competition can also drive convergent evolution. On the other hand, interspecific (between-species) competition is usually expected to impede adaptation and diversification because competitor species occupy potential available niches, preventing the focal species from diversifying to do so. In this thesis, I review previous experimental studies exploring the effects of competition on adaptive diversification, and then directly test these effects using experimental evolution of the bacterium Pseudomonas fluorescens. I confirm that intraspecific competition drives adaptive diversification, while the effects of interspecific competition are varied. Strong interspecific competition impedes adaptation and diversification, while the presence of weak, non-diversifying interspecific competitors drives diversification through increased resource competition. The presence of ecological opportunity is essential for adaptation and diversification, and so variation in attributes of those opportunities is expected to have important effects on the dynamics of adaptive evolution. In another evolution experiment with P. fluorescens, I tested the effects of variation in ecological opportunity on adaptive evolution and found that the type and arrangement of ecological opportunities drives adaptation but, in this system, not diversification. I also show that ecological opportunity drives differences in the degree of parallel evolution at the phenotypic and genotypic level. Finally, I explore some unexpected genetic changes identified in one of these evolved populations - two synonymous mutations that conferred fitness benefits, and show that the observed fitness improvements are the result of increased gene expression. I have shown that ecological processes can play an important role in shaping the evolutionary trajectories taken by populations. Understanding the interactions between ecological and evolutionary processes is vital for our understanding of evolutionary dynamics as a whole, and the studies laid out in this thesis represent valuable contributions to this field of study.
Influence of cooling methods on the mechanical properties of OPC and OPC/slag concretes after exposure to elevated temperatures
Creators: name: Mendes, Alessandra
name: Sanjayan, Jay
name: Collins, Frank
Publisher: name: Swinburne
Year: 2024

description: The present work investigates the residual mechanical properties of OPC and OPC/slag concretes, exposed to either 400 or 800ºC followed by furnace or water cooling. The heat transfer from surface to centre of the specimens maintained similar trend for all blends for both 400 and 800ºC. After 400ºC, OPC and OPC/slag water cooled specimens presented a further 20% loss in the residual strength when compared with furnace cooled specimens. This additional strength decrease of 20% is possibly due to thermal stresses caused by the thermal shock of the concrete with water at 20ºC. After 800ºC, all OPC/slag water cooled specimens presented further strength loss of 5% when compared with furnace cooled specimens. However, water cooled OPC specimens presented strength loss of 14% when compared with furnace cooled specimens, and therefore, thermal stresses cannot solely be the cause of this strength loss. At 800ºC dehydration of Ca(OH)2 into CaO would have taken place, followed by rehydration of CaO after cooling. Infrared spectroscopy showed that the peak intensity of Ca(OH)2 is much higher for OPC cooled with water than for furnace cooled, suggesting rehydration of CaO is accelerated with water cooling, resulting in greater strength loss for OPC concrete exposed to 800ºC.
L’amour imparfaitement rationnel : la conception de l’amour dans la moralité kantienne
Creators: name: Kenny, Katherine
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: Kant
Amour
Métaphysique des moeurs
Devoir d'amour
Amour pathologique
Amour pratique
Raison
Émotion

description: Cette thèse cherche à expliquer le concept de l’amour chez Emmanuel Kant. Elle essaye de catégoriser les différentes définitions de ce concept. Elle tente d’analyser ces définitions en utilisant trois clés d’analyse : la raison et l’émotion, la liberté et la communauté et la distance et la proximité. L'amour kantien est aussi analysé dans la perspective de la nature du sujet kantien pour le comparer au devoir d’amour.
The Effects of Menstrual Cycle Phases and Adiposity on Energy Balance in Women
Creators: name: McNeil, Jessica N.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: menstrual cycle
energy intake
resting metabolic rate
physical activity energy expenditure
premenstrual syndrome
relative reinforcing value of food
leptin

description: Energy intake (EI) and energy expenditure (EE) across the menstrual cycle (MC), while considering body adiposity, have not been previously evaluated in the same individuals. This study mainly examined the variations in energy balance (EB) across MC. Seventeen women (Body fat-DXA:28.5%) participated in three identical sessions during distinct phases of the MC: Early-follicular, Late-follicular/ovulation and Mid-luteal (confirmed by basal temperature and sex-steroid hormones). EI, resting metabolic rate (RMR), physical-activity EE (PAEE), severity of PMS, leptin and relative-reinforcing value (RRV) of preferred foods were measured during each phase. No differences in body fat, EI, RMR, PAEE, leptin and RRV of food were noted across MC. Trends were noted in preferred snack (p=0.06) and combined snack/fruit (p=0.06) intakes, while differences were noted in severity of PMS (p<0.05) across phases. Changes in EB across the MC were not noted. PMS was more severe, and preferred snack and combined snack/fruit intakes were slightly higher during mid-luteal phase.
Towards Diverse Media Augmented E-Book Reader Platform
Creators: name: Alam, Kazi Masudul
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: haptic modality
multi-modal interface
edutainment system
mobile learning
home multimedia systems

description: In order to leverage the use of various modalities such as audio-visual-touch in instilling learning behaviour, we present an intuitive approach of annotation based hapto-audio-visual interaction with the traditional digital learning materials such as eBooks. By integrating the traditional home entertainment system and respective media in the user's reading experience combined with haptic interfaces, we examine whether such augmentation of modalities influence the user's reading experience in terms of attention, entertainment and retention. The proposed Haptic E-Book (HE-Book) system leverages the haptic jacket, haptic arm band as well as haptic sofa interfaces to receive haptic emotive signals wirelessly in the form of patterned vibrations of the actuators and expresses the learning material by incorporating audio-video based augmentation in order to pave ways for intimate reading experience in the popular eBook platform. We have designed and developed desktop, mobile/tablet based HE-Book system as well as a semi-automated annotation authoring tool. Our system also supports multimedia based diverse quiz augmentations, which can help in learning tracking. We have conducted quantitative and qualitative tests using the developed prototype systems. We have adopted the indirect objective based performance analysis methodology, which is commonly used for multimedia based learning investigation. The user study shows that, there is a positive tendency of accepting multimodal interactions including haptics with traditional eBook reading experience. Though our limited number of laboratory tests reveal, that haptics can be an influencing media in eBook reading experience, but it requires large scale real life tests to provide a concluding remarks.
Modeling Land-use Changes in the South Nation Watershed Using Dyna-CLUE
Creators: name: El Khoury, Antoun
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: Dyna-CLUE
Land Use Changes
Historical Trends
Projections
GIS

description: The South Nation watershed is located in Eastern Ontario, Canada and managed under the authority of the South Nation Conservation (SNC). The watershed covers an area of 400,000 hectares with four dominant categories of land-use classes (60% agriculture, 34% forest, 5% mixed urban, and 1% other). Water quality is a great concern for the SNC as many anthropogenic activities generate harmful pollutants (such as heavy metals, nitrogen, phosphorus, and pesticides) that are discharged to the river through surface and groundwater flow. The discharge patterns of these pollutants are mainly driven by land-use distribution within the watershed which has been constantly evolving with urbanization and intensification of agriculture. Major changes in land-uses can potentially offset current SNC efforts to mitigate water pollution. The objective of the current study is to predict land-use series of maps for the South Nation watershed starting from 1991 to 2020. The prediction is carried out using the land-use allocation algorithm of the Dyna-CLUE (Dynamic Conversion of Land-Use and its Effects) model which is implemented for local regions. Dyna-CLUE is a spatially explicit hybrid land-use allocation model that combines estimation and simulation models, and its allocation procedures predict future trends of land-use surface (estimated from historical trends). The binary logistic regression is used to link preferences of land-use classes and potential demographic and geographic driving factors. Expert judgment was used to select a set of spatial driving factors believed to be responsible for changes in land-use distribution in the South Nation watershed. Three different scenarios for future development of the region were considered, with different initial conditions and conversion restrictions. The simulation results were evaluated using visual and statistical validation techniques to assess the performance of the model in generating maps similar to reality. The Dyna-CLUE model was successfully applied to the South Nation watershed. It was observed that the simulated maps generated from the model were in good agreement with the reality maps. This was confirmed through statistical validation via map pair analysis (error matrix) used to assess the overall accuracy of the model predictions. Results showed that the model was sensitive to land-use restrictions. Such type of modeling can be valuable for assessing the land-use changes at the local level, and setting up a decision support system for the South Nation Conservation towards sustainable land-use management in the watershed. Better results are expected to be achieved with more reliable datasets (i.e., accurate classification of land-use types in reality maps). Data availability and quality were the main obstacles that faced this research work. Our work has the merit to be the first application of CLUE model in Eastern Ontario.
The Hive of Humanity_ Resonant Field Dynamics in Distributed Intelligence Systems
Creators: name: Bostick, Devin
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Physics
subject: Mathematical Computing
subject: Nonlinear Dynamics
subject: Social Learning
subject: Hierarchy, Social
subject: Psychology, Social
subject: Reinforcement, Social
subject: Social Responsibility
subject: Social Sciences
subject: Social Problems
subject: Social Conformity
subject: Social Identification
subject: Social Behavior

description: Main CODES Framework

Abstract

Prime numbers have long been regarded as the building blocks of arithmetic—indivisible entities whose spacing appears irregular, mysterious, and resistant to formulaic prediction. But this view confines them to the domain of quantity, severed from their deeper structural function in the fabric of reality. Within the CODES framework (Chirality of Dynamic Emergent Systems), primes are not simply numerical anomalies; they are resonance scaffolds—discrete gateways that unlock new layers of coherence in physical, biological, and cognitive systems.

This paper proposes that the ordering of prime numbers reflects not size but emergence. Each prime introduces a new asymmetry interval in the lattice of structured resonance, catalyzing the formation of complex systems from waveforms to language to consciousness itself. Primes are thus recast as phase architects—points where the universe undergoes qualitative shifts in coherence, pattern, and perception.

By tracing how primes shape chirality in DNA, organize resonance bands in brain activity, govern logic transitions in AI, and scaffold cosmological structures, this paper establishes that the prime sequence is not accidental—it is the emergence code of intelligence. Rather than describing randomness, the prime lattice encodes the structural inevitability of meaning. CODES positions prime numbers as the true spine of coherence in a post-probabilistic universe.
Le pouvoir dans le récit d'une émeute carcérale « L'émeute d'Archambault : la nuit d'horreur racontée heure par heure »
Creators: name: Cousineau, Sophie
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012

description: Cette recherche qualitative porte sur les dynamiques du pouvoir dans le récit d’une émeute carcérale. L’analyse du récit-témoignage de Dunn (1983) révèle que le pouvoir y est protéiforme, fluctuant et négocié à travers trois niveaux d’interactions : celui de la représentation (entre personnages), de la narration (entre observateur et spectateurs virtuels ou actuels) et de la légitimation (entre l’auteur et son lectorat). Dix répertoires actualisent un aspect performatif grâce au recours à l’une ou à plusieurs formes de pouvoir : le relief dramatique (un pouvoir de surface), l’autorité directoriale (un pouvoir véritable) et le pouvoir disruptif (un pouvoir qui morcèle les interactions). Ces trois formes de pouvoir découlent à divers égards du schéma dramaturgique de Goffman (1973/1974). Plus encore, les interactions traversées par le pouvoir se créent par la mise sur pied d’une définition de situation et d’un consensus temporaire.
Emergence of a Cancer Identity in Emerging Adulthood: Weblogs as Illness Narratives
Creators: name: Soltermann, Tanya C.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2014
Subjects: Emerging Adulthood
Illness Narratives
Cancer
Weblogs as Data Source
Social Identity

description: The focus of this research is on the specific relational and particular circumstances that result in an emerging cancer identity expressed through the daily lived- experiences of emerging adults via personal weblogs. Identity, a complex term in its own right, is discussed here under the rubric of social identity as processual, therefore it is expected that an emerging cancer identity will develop as the participants begin to narrativize their daily experiences with cancer on their weblogs. By critically engaging with notions of emerging adulthood theories with theories on the sociology of death and dying and illness narratives, this research seeks to understand the specific psychosocial changes that occur as the participants engage with their illness on their weblogs, which arguably contributes to an emerging cancer identity.
Developing entrepreneurial orientation: the role of dynamic capabilities and intangible resources
Creators: name: Madsen, Einar L.
name: Alsos, Gry A.
name: Borch, Odd-Jarl
name: Ljunggren, Elisabet
name: Brastad, Bjorn
Publisher: name: Swinburne
Year: 2024

description: This paper adds to the debate on entrepreneurial orientation and dynamic capabilities. We build upon the resource-based view analyzing firm resources crucial for taking the firm towards new competitive business platforms. We imply that the assets of tangible and intangible resources work together with dynamic capabilities to stimulate entrepreneurial strategies within the firm. Particularly we focus upon the role of intangible resources and dynamic capabilities in developing entrepreneurial orientation. Specifically, we suggest that dynamic capabilities mediate the relationship between intangible resources and entrepreneurial orientation. Data from a sample of 651 Norwegian firms engaged in R&D activities was utilized to empirically test the hypotheses. The findings indicate that dynamic capabilities related to opportunity search and readjustment ability are related to entrepreneurial orientation. Further, these dynamic capabilities mediate the relationship between relation-based resources and entrepreneurial orientation, while knowledge-based resources were found to be directly associated with entrepreneurial orientation.
Building a Bridge Between Work-family Issues and Growth Intentions of Female Entrepreneurs
Creators: name: Xia, Ruoxi
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: work-family conflict
family-to-work enrichment
growth intention

description: Employing a sample of 116 female entrepreneurs, this study investigated how work-family issues, including work-family conflict and enrichment, relate to their intention to grow the business that they own or co-own. Results suggest that family-to-work enrichment directly related to female entrepreneurs’ business growth intentions, and important family members seems highly salient to female entrepreneurs’ business growth decisions.
Ökonomische Bewertung von Klimaschutzmaßnahmen im Verkehr
Creators: name: Breisig, Volker
name: Hess, Borge
name: Rath, Lukas
Publisher: name: Umweltbundesamt
Year: 2022
Subjects: subject: Klimaschutz
subject: Wirtschaftliche Bewertung
subject: Verkehr
subject: Kosten
subject: Ökonomische Bewertung
subject: Nutzen
subject: Verkehr

description: Der vorliegende Abschlussbericht enthält die Ergebnisse des Projektes "Ökonomische Bewertung von Klimaschutzmaßnahmen im Verkehr". Diverse mögliche Maßnahmen zur Unterstützung der Erreichung der Sektorziele im Verkehr werden derzeit diskutiert. In diesem Projekt wurde für eine Auswahl von 14 Einzelmaßnahmen und drei Maßnahmenbündel einzelwirtschaftliche, gesamtwirtschaftliche und verteilungsbezogene Wirkungen bis zum Jahr 2050 untersucht. Das Projekt beinhaltete die Aufbereitung des Forschungsstandes auf dessen Basis ein ganzheitlicher Ansatz auch zur Bewertung von externen Umwelt- und Gesundheitseffekten aufgebaut wurde. Die anschließende Bewertung mittels einzel- und gesamtwirtschaftlicher Modelle mündete in einer Gesamtbetrachtung und der Erarbeitung einer vergleichenden Bewertung einer möglichen Umsetzung von Klimaschutzmaßnahmen. Quelle: Forschungsbericht
description: This final report contains the results of the project "Economic evaluation of climate protection measures in transport". In order to ensure the achievement of the mitigation target for the transport sector in Germany, there is still a debate regarding the best policy measures to be applied. In this project, 14 specific measures and three bundles have been chosen to be evaluated regarding sectoral, macroeconomic and distribution-related effects until 2050. Within the scope of the project and based on an overview about evaluation approaches applied in research, a holistic evaluation approach was developed also covering external effects. Afterwards, the specific evaluation was processed by applying sectoral and macroeconomic models, and a comparative analysis was performed. Quelle: Forschungsbericht
description: Für das Erreichen der Klimaschutzziele im Verkehr müssen wirksame Maßnahmen und Instrumente umgesetzt werden. Bisher wurden in diesem Zusammenhang ⁠Klimaschutz⁠ und Wirtschaftlichkeit häufig als Gegenspieler betrachtet. Der im Vorhaben "Ökonomische Bewertung von Klimaschutzmaßnahmen im Verkehr" erarbeite einheitlicher Bewertungsansatz ermöglicht eine vergleichende Bewertung der ökonomischen Auswirkungen von Klimaschutzmaßnahmen im Verkehr. Neben einzelwirtschaftlichen Effekten im Verkehrssektor, ist auch die Bewertung gesamtwirtschaftlicher Wirkungen für Deutschland jeweils unter Berücksichtigung von externen Effekten möglich. Die Ergebnisse zeigen, dass alle 14 Klimaschutzmaßnahmen und 3 Maßnahmenbündel ökonomisch vorteilhaft sind.