cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modellierung, Charakterisierung und Design von PIN-Dioden zur Nutzung als ESD-Schutzstrukturen und Hochleistungsbauelementen
Creators: name: Scharf, Patrick
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2022

description: Mit der Entdeckung des Gleichrichter-Effekts 1873 wurde der theoretische Grundstein für die Halbleiter-Diode gelegt. Heutzutage sind Dioden auf nahezu allen elektronischen Schaltungen zu finden. Sie erfüllen dabei unterschiedlichste Aufgaben und finden Anwendung zum Beispiel als Gleichrichter, RF-Widerstand oder ESD-Schutzstruktur. Dioden basieren auf einem p/n-Übergang, welcher den Stromfluss in eine Richtung passieren lässt und in die andere Richtung sperrt. Bei PIN-Dioden wird zwischen der p-dotierten und der n-dotierten Zone noch ein intrinsisches bzw. niedrig dotiertes Gebiet eingefügt. Im Rahmen dieser Arbeit wurden Silizium- und GaAs- basierte PIN-Dioden für den Einsatz als ESD-Schutzstruktur und für Anwendungen in der Leistungselektronik untersucht. Mit Hilfe von TCAD-Simulationen wurden verschiedene Eigenschaften der PIN-Dioden unter Einwirkung eines ESD-Ereignisses analysiert. Die Bildung und Bewegung von Stromfilamenten konnte dabei beobachtet werden. Es stellte sich heraus, dass die Geometrie der Schutzdiode einen direkten Einfluss auf deren Lebensdauer hat. Es konnten Designvorschläge für ein optimiertes ESD-Schutzverhalten gemacht werden. Zur Validierung der Ergebnisse wurden verschiedene PIN-Dioden hergestellt und mittels TLP-Messung charakterisiert. Bei sehr schmalen Strukturgrößen konnten mehrere Spannungsabfälle beobachtet werden, was auf das Vorhandensein mehrerer Stromfilamente hindeutet. Diese Vermutung konnte anhand von TCAD-Simulationen bestätigt werden. Zur Analyse eines Layouts auf dessen ESD-Robustheit sind zeitintensive TCAD-Simulationen ungeeignet. Aus diesem Grund wurden auf Basis der TLP-Messungen und TCAD-Simulationen layoutabhängige Kompaktmodelle entwickelt. Diese ermöglichen eine schnelle Simulation der rückläufigen Kennlinie einer in Sperrrichtung vorgespannten PIN-Diode. Zusätzlich konnten die Bildung und Bewegung eines Stromfilaments nachgebildet werden. Im Hinblick auf Anwendungsmöglichkeiten in der Leistungselektronik, wurden Untersuchungen an GaAs-basierten PIN-Dioden durchgeführt. Diese zeichnen sich vor allem durch deutlich höhere Durchbruchspannungen aus. Mit TCAD-Simulationen und Hochspannungsmessungen wurden die Dioden charakterisiert. Aus den gewonnenen Erkenntnissen konnte ein analytisches Modell abgeleitet werden, was eine Optimierung der Diodenstruktur im Hinblick auf die Durchbruchspannung ermöglichte.
Assessing Niche Shifts and Conservatism by Comparing the Native and Post-Invasion Niches of Major Forest Invasive Species
Creators: name: Srivastava, Vivek
name: Liang, Wanwan
name: Keena, Melody A.
name: Roe, Amanda D.
name: Hamelin, Richard C.
name: Griess, Verena C.
Publisher: name: Multidisciplinary Digital Publishing Institute
Year: 2020

description: Invasive species experience biotic and abiotic conditions that may (or may not) resemble their native environment. We explored the methodology of determining climatic niches and compared the native and post-invasion niches of four invasive forest pests to determine if these species experienced shifts or changes in their new climatic niches. We used environmental principle components analysis (PCA-env) method to quantify climatic niche shifts, expansions, and temporal changes. Furthermore, we assessed the effect of variable selection in the delineation and comparison of niche space. We found that variable selection influenced the delineation and overlap of each niche, whereas the subset of climatic variables selected from the first two PCA-env axes explained more variance in environmental conditions than the complete set of climatic variables for all four species. Most focal species showed climatic niche shifts in their invasive range and had not yet fully occupied the available niche within the invaded range. Our species varied the proportion of niche overlap between the native and invasive ranges. By comparing native and invasive niches, we can help predict a species’ potential range expansion and invasion potential. Our results can guide monitoring and help inform management of these and other invasive species.
Sex Differences in Lower Limb Muscle Activation Patterns in Participants with Knee Osteoarthritis and Healthy Controls
Creators: name: Bigham, Heather Jean
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: Osteoarthritis
Sex differences
Knee stability
Neuromuscular control
Older adults

description: Muscular stabilisation strategies during activities of daily living alter in the presence of knee osteoarthritis (OA). By examining neuromuscular adaptations using our weight-bearing target match protocol, the main objective of this research is to establish sex differences in adaptations of neuromuscular control that are associated with older males and females with and without OA. 66 participants completed the protocol while EMG, ground reaction forces (GRF), and kinematics were recorded. Muscle activation patterns were presented in polar plots with an EMG vector representing normalised muscle activation in twelve directions, each representing a GRF vector scaled to 30% maximal effort. Asymmetry about the polar plot (activation occurring in one direction more than another) was determined and specificity index (SI) and mean direction of activation were calculated when appropriate. Healthy females demonstrated greater rectus femoris (RF) mean muscle magnitude (XEMG) (p=0.067) and less biceps femoris (BF) XEMG than healthy males (p=0.084) and females with OA (p=0.041), and males and females with OA demonstrated greater RF XEMG than healthy controls of the same sex (p=0.016, 0.072, respectively). Females with OA had significantly greater medial gastrocnemius XEMG than healthy females (p=0.031) and males with OA (p=0.020). Females with OA have less specificity in all muscles compared to males with OA and OA participants generally had less specificity compared to healthy controls of the same sex. Healthy males had the largest SI for lateral gastrocnemius with an asymmetrical activation pattern contrasting the more symmetrical activation pattern of all other groups. In conclusion, we suggest OA-affected adults and healthy females use a quadriceps dominant strategy to stabilise the joint, and that this strategy may be a compensatory mechanism for reduced quadriceps function. We suggest RF, BF, MG, and LG should be targeted for prophylactic intervention as they displayed altered activation strategies in participants with OA and healthy females.
Plasma characterization and modelling for c-Si solar cells thin film deposition
Creators: name: Rachdi, Lazhar
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: Alternative Energiequelle
Erneuerbare Energien
Alternative Technologie
Physik
Kondensierte Materie
Plasmaphysik
Oberflächenbeschichtung

description: In this work, plasmas produced during thin film deposition are characterized. The proposed investigations focused on plasmas constituted by silane (SiH4) and ammonia (NH3) gas mixtures due to their extensive use for the deposition of dielectric layers in particular silicon nitride (SiNx). Moreover, plasma characterization using optical emission spectroscopy (OES) is the focus of this work, due to its fast and non-intrusive nature making it ideal for industrial applications. The novelty of this research lies in the quantitative use of plasma emission to extract important plasma parameters, followed by the utilization of the results for modelling purposes. The investigated plasma parameters are the electron density and the shape of the electron energy distribution. OES-based plasma parameters are used to calculate electron impact dissociation rates for silane and ammonia. Aminosilane species were found to be the most important precursors for silicon nitride growth. The calculated radical densities were used to interpret the experimental SiNx layer compositions. When varying the ammonia-to-silane gas flow, three different plasma regimes were found depending on the main precursor for the layer growth. Moreover, SiNx layer characteristics highly depend on the regime in which it was deposited.
Sole parents, social well being, housing location and housing assistance
Creators: name: Birrell, Bob
name: Rapson, Virginia
name: Burke, Terry
name: Hulse, Kathleen
Publisher: name: Swinburne
Year: 2024

description: Sole parents have the highest poverty rate of any group in Australia and, not surprisingly, are one of the largest groups in receipt of housing assistance. The number of sole parents is also growing at a dramatic rate. Two AHURI projects have been looking at issues raised by these trends. This report incorporates research findings from these projects, both by the AHURI Swinburne-Monash Research Centre. Bob Birrell and Virginia Rapson examine the location and housing needs of sole parents. Terry Burke and Kath Hulse explore the relationships between sole parents, social well being and housing assistance. Important policy questions addressed by the research are whether sole parents are being forced by high housing prices to live in areas of poor job availability and the role of Commonwealth Rent Assistance in supporting the social well being of sole parents.
Men’s Strategies after a Heart Incident: A Class-based Masculinities Approach
Creators: name: Smith, Adam
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: Health
Bourdieu
Class-based masculinity
Men
Flourishing
Cardiac rehabilitation
Heart disease
Security
Autonomy
Dignity
Health lifestyles
Underprivileged men

description: Men in economically advanced societies are more at-risk of premature mortality due to heart disease than women, and this risk is inversely proportional to their socioeconomic status (SES). In Canada, many public health reports indicate that cardiovascular disease represent about one third of all causes of death and that men’s mortality rates from these diseases are two times higher than women, making it the main contributor to health inequality. Underprivileged men have been identified as being less receptive to cardiac rehabilitation guidelines, yet research promoting heart healthy behaviours has often neglected the social mechanisms that influence the lifestyle of this population. This study aims to understand the social variation in dispositions and commitments toward body care of men from two contrasting socioeconomic groups who have suffered from a cardiovascular incident requiring hospitalization. It draws primarily on Pierre Bourdieu’s socio-cultural theory of practice and his concept of bodily habitus in order to understand distinctive lifestyle patterns in the context of cardiac rehabilitation. Qualitative data was collected through 60 semi-structured interviews of an average duration of 90 minutes. Participants were Francophone men (average age of 57.3) from the Outaouais region of the Province of Québec, Canada. A thematic content analysis showed strong social variation in terms of lifestyle and identified different dispositions towards body care in the context of heart disease. Results are organized according to three key strategies for human flourishing following a heart incident that are relevant to understand the dispositions to adopt (or not) heath practices in the context of cardiac rehabilitation: (a) achieving a sense of security; (b) preserving autonomy; and (c) maintaining dignity. The comparison between socioeconomic groups highlights the incompatibilities of healthcare services and rehabilitation programs with the priorities of underprivileged men. It also flags the potential ethical and political dimension of healthcare by examining notions of health citizenship. In conclusion, the thesis discusses the socio-political characteristics of cardiac rehabilitation programs, and the usefulness of class-based masculinities as an alternative point of view to understand health implications of lifestyles.
Molecular Dynamics Study of Novel Cryoprotectants and of CO2 Capture by sI Clathrate Hydrates
Creators: name: Nohra, Michael
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: Molecular dynamics
cryoprotectants
AFGP
CO2
capture
sI clathrate hydrates
Thermodynamic integration
Gibbs Free energy

description: The first project in this work used classical molecular dynamics to study the ice recrystallization inhibition potential of a series of carbohydrates and alcochols, using the hydration index, partial molar volumes and isothermal compressibilities as parameters for measuring their cryogenic efficacy. Unfortunately, after 8 months of testing, this work demonstrates that the accuracy and precision of the density extracted from simulations is not sufficient in providing accurate partial molar volumes. As a result, this work clearly demonstrates that current classical molecular dynamics technology cannot probe the volumetric properties of interest with sufficient accuracy to aid in the research and development of novel cryoprotectants.The second project in this work used molecular dynamics simulations to evaluate the Gibbs free energy change of substituting CO2 in sI clathrate hydrates by N2,CH4, SO2 and H2S flue gas impurities under conditions proposed for CO2 capture (273 K, 10 bar). Our results demonstrate that CO2 substitutions by N2 in the small sI cages were thermodynamically favored. This substitution is problematic in terms of efficient CO2 capture, since the small cages make up 25% of the sI clathrate cages, therefore a significant amount of energy could be spent on removing N2 from the flue gas rather than CO2. The thermodynamics of CO2 substitution by CH4, SO2 and H2S in sI clathrate hydrates was also examined. The substitution of CO2 by these gases in both the small and large cages were determined to be favorable. This suggests that these gases may also disrupt the CO2 capture by sI clathrate hydrates if they are present in large concentrations in the combustion flue stream. Similar substitution thermodynamics at 200 K and 10 bar were also studied. With one exception, we found that the substitution free energies do not significantly change and do not alter the sign of thermodynamics. Thus, using a lower capture temperature does not significantly change the substitution free energies and their implications for CO2 capture by sI clathrate hydrates.
Bandwidth efficient web object change interval estimation
Creators: name: Armitage, Grenville
name: Malcolm, Clancy L.
Publisher: name: Swinburne
Year: 2024

description: Estimating the average time between changes to objects on the Web has many applications including content distribution networks, search engines, web site monitoring and measuring web dynamics. This paper provides formulas for estimating average object change interval and efficient visit scheduling algorithms. We show that the models developed are more accurate and produce less server and network load than previously devised techniques.
The Truth to Sentencing: Analyzing the Construction of Truth in Bill C-25
Creators: name: Sewell, Rowan A.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2013
Subjects: Truth-in-sentencing
crime
legislation
Bill C-25
Bill C-25, The Truth in Sentencing Act
sovereign power
sovereign might
David Garland
Strategies of Adaptation
Strategies of Denial
Criminology of the Self
Criminology of the Other
predicament of crime control
socio-legal
crime control in the canadian context
canadian context

description: Bill C-25, The Truth in Sentencing (TIS) Act legislates the reduction of credit awarded for time served in pre-sentencing custody. The Act is but one initiative that reflects a shift toward punitiveness by the West. In reading the literature, a gap was identified concerning TIS activities in relation to the current Canadian predicament of crime control, and a socio-legal perspective provided a creative means of looking at this gap. The primary data was coded and analyzed using sensitizing categories derived from a leading theoretical framework. This framework posited the existence of conflicting criminologies and resulting strategies together forming the present regime of truth. This thesis concludes that 'truth' in sentencing is premised upon contradictory understandings as defined by the framework, that conflicting rationalities are reproduced within TIS and that although the Act is touted as an administrative reform, it also reasserts sovereign power over issues of crime and its control.
The Perceptions of University and Immigrant Women Aged 18 to 25 About the Human papillomavirus Vaccines: A Cross-sectional Study
Creators: name: Fernandes, Rachel
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2014
Subjects: Human papillomavirus
Vaccine
Sexually transmitted infection
Health behaviour
Attitude to health

description: Persistent infection with certain subtypes of Human papillomavirus (HPV) is a necessary cause of cervical cancer, the second most common cancer among women worldwide. Uptake of HPV vaccines in the targeted Canadian female population has been lower than anticipated. This study’s primary objective was to determine undergraduate women’s perceptions about HPV vaccination. A total of 401 female University of Ottawa undergraduate students completed a newly developed cross-sectional web survey. The prevalence of HPV vaccination was 49%. While the overall attitude towards receiving the vaccine was positive, vaccinated respondents had more favorable attitudes toward the vaccine. Lack of vaccine knowledge and cost were the primary barriers that have prevented HPV vaccination among non-vaccinated respondents. Offering HPV vaccination for women aged 18 to 25 presents a strategy for addressing suboptimal vaccination coverage in the targeted female population and may reduce health inequities demonstrated by variations in cervical cancer incidence within jurisdictions.
Optimization of large capacitor array parasitics in terms of accuracy
Creators: name: Talawai, Shruti
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2025

description: Capacitor arrays are fundamental components in analog-to-digital converters (ADCs) and other precision circuits. However, their performance is often hindered by parasitic effects, which can compromise accuracy and overall system functionality. This thesis focuses on optimizing the layout of large capacitor arrays to minimize parasitic effects, ensuring improved accuracy and efficiency in circuit performance.
Supplementary document for Phase change and compensation of Gaussian beam propagation in an absorbing media - 5393629.pdf
Creators: name: Lu, Lu
name: Wang, Zhiqiang
name: Zhang, peng
name: Qiao, Chunhong
name: Cai, Yangjian
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental materials
Caraboctonidae Kraepelin 1905
Creators: name: Soleglad, Michael E.
name: Fet, Victor
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Caraboctonidae

description: Family Caraboctonidae Kraepelin, 1905, new rank   Type Genus. Caraboctonus Pocock, 1893.
 Composition. This new family is established here. It includes two subfamilies: Caraboctoninae and Hadrurinae. Tribes are not recognized.
 Distribution. North America, South America.
 Biogeographic history. The family Caraboctonidae has a disjunct range, with subfamily Caraboctoninae in South America (with two disjunct genera), and subfamily Hadrurinae with disjunct range in Mexico and North America.
 Diagnosis. Synapomorphies. Chelal trichobothrium  Et 5  positioned on fixed finger; neobothriotaxy present on external surface of patella; dorsal edge of cheliceral movable finger with two subdistal denticles; leg coxae IV elongated; lateral carinae partially present on
 metasomal segment IV; chela with “10-carinae” configuration. Important Symplesiomorphies. Ventral edge of cheliceral movable finger with one large denticle; ventral surface of leg tarsus with median row of spinule clusters; stigma oval in shape; chelal trichobothrial series db–dt and eb–et found on distal half of finger; patellar ventral trichobothrium  v 3  found on external surface.
description: Published as part of Soleglad, Michael E. & Fet, Victor, 2003, High-level systematics and phylogeny of the extant scorpions (Scorpiones: Orthosterni), pp. 1-175 in Euscorpius 2003 (11) on pages 110-111, DOI: 10.18590/euscorpius.2003.vol2003.iss11.1, http://zenodo.org/record/13237351
Gendered Emotional Manipulation: An Investigation of Male and Female Perceptions of the Player Identity in Romantic Relationships
Creators: name: Ghani, Faadia
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: Romantic Relationships
Gendered Emotional Manipulation
Narrative Inquiry Research
Player
Gender Relations

description: Although interpersonal communication studies have focused on various aspects of interpersonal relationships, research on the player identity and gendered emotional manipulation in romantic relationships has received little attention. This narrative research inquiry was undertaken to explore perceptions of men and women related to the player identity and gendered emotional manipulation. This investigation used social construction as a theoretical perspective to understand three areas of investigation that include: the existence and relevance of the player identity, the player’s relation to emotionally manipulative behaviour, and the connection between socially constructed gender conventions and the player identity. Hesse-Biber’s (2006) feminist interviewing approach guided semi-structured interviews with six male and six female participants. Respondents reported the existence and relevance of the player identity in romantic relationships today, connecting this identity to emotionally manipulative behaviour, as well as relating this identity to traditional gender conventions. Finally, implications for men and women in romantic relationships today and future areas of research are discussed in light of these findings.
Design of Millimeter-Wave Power Amplifiers in Gallium Nitride High-Electron-Mobility Transistor Technology
Creators: name: Cwiklinski, Maciej
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: gallium nitride (GaN)
power amplifier
millimeter-wave monolithic microwave integrated circuit (MMIC)
high-electron-mobility transistor (HEMT)

description: Gallium nitride (GaN) high-electron-mobility transistor (HEMT) technology appears as an appealing candidate for supporting a variety of millimeter-wave (mm-wave) applications with its unique combination of simultaneous high-voltage and high-frequency operation. However, despite the rapid advance in GaN HEMT technology, the reported available gain of the devices is still limited at higher mm-wave frequencies in comparison to the competing high-speed semiconductor processes. This work investigates several approaches to enhance the performance of GaN-based circuits operating within the mm-wave spectrum. The main aim is to provide a set of design approaches and techniques to enable broadband operation of mm-wave GaN power amplifier monolithic microwave integrated circuits (MMICs), with a particular focus on frequencies close to and beyond the 100-GHz mark. In order to fulfill this goal, these approaches need to simultaneously target distinct design levels. Furthermore, implementing the concepts investigated in this work on circuit-level result in several MMICs providing state-of-the-art performance among GaN-based power amplifiers.
Role of the 26S Proteasome and Posttranslational Modifications in Regulating the Expression of Retinoic Acid-Responsive Genes
Creators: name: Higazi, Aliaa M.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: RAR
RARE
proteasome
ubiquitination
P19 cells
gene transcription

description: Retinoic acid (RA) has been recognized as a chemotherapeutic agent for various malignances such as lung, skin as well as cervical cancers. It binds to retinoid receptors heterodimers and consequently activates several RA-responsive genes which are involved in many biological processes including vertebrate development, bone growth, vision, haematopoiesis, cell growth, differentiation and apoptosis. These genes are under the control of numerous regulators to ensure their timely ordered activities. Among these regulators, we focused here on the 26S proteasome and ubiquitination. It has been reported that the activity of the ubiquitin/proteasome system (UPS) plays a fundamental role in retinoic acid receptor (RAR)-regulated transactivation. The mechanisms underlying this role, however, remain to be established. Chromatin immunoprecipitation (ChIP) assays in our study demonstrated that the 26S proteasome activity is important for preserving the occupancy of a TATA box-containing RA-responsive promoters by liganded retinoid receptors and thus by their coactivators. Additionally, by using coimmunoprecipitation assays and by measuring the half-life of retinoid receptors, we found that the non-proteolytic function of the proteasome is required for ligand-dependent association between DNA-free RAR-α and both DNA-free RXR-α and coactivators. Moreover, using immunofluorescent staining and in vivo ubiquitination assays, a proteasome inhibition-dependent cytoplasmic localization of RAR-α as well as ligand-enhanced ubiquitination and stabilization of RAR-α were shown. Our findings therefore, define novel mechanisms by which the UPS controls RAR-regulated genes. Furthermore, we shed new light on the regulators of retinoid receptors ubiquitination and subcellular localization.
Resident participation: framing the vision for community regeneration
Creators: name: Arthurson, Kathy
Publisher: name: Swinburne
Year: 2024

description: Public housing estate regeneration and the active involvement of residents are the topics of this paper. The author explains that without active involvement of residents in regeneration, policy measures are likely to fail and in doing so reinforce any existing sense of political powerlessness in disadvantaged communities. She examines some of the courses of action that aim to increase residents' access to decision making processes in two Australian regeneration projects, at Manoora in far North Queensland and The Parks in metropolitan South Australia. The processes around the development of the community action plans are compared and contrasted, to ascertain what is working well and not so well, and to identify some of the major challenges and tensions arising in the two projects.
Stratigraphic Architecture and Depositional History of Laterally-accreted Channel Fills in the Lower Isaac Formation, Windermere Supergroup, British Columbia, Canada
Creators: name: Dumouchel, Iain
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: deep-marine slope channels
sinuous channels
lateral accretion deposits (LAD)
Neoproterozoic
Windermere Supergroup
stratified turbidity currents

description: Continental slope channels, which serve as the primary conduits for sediment transport into the deep marine, occasionally become sites of sediment deposition with excellent reservoir potential. Increasingly reported in the literature are subsurface channel fills exhibiting shingled seismic reflectors that are interpreted to have formed by lateral channel migration. In lower Isaac Formation channels inclined strata are observed but at a lateral scale that is far below industry-seismic detection. Distinctively these flat-based channels are filled with coarse-grained sandstone that transitions abruptly and obliquely upwards into thin, fine grained turbidites. Like rivers, lateral accretion in Isaac channels is interpreted to be the result of the interaction of inertial and pressure forces, but in highly turbulent, highly density-stratified turbidity currents. This resulted in the formation of two superimposed secondary circulation cells that caused enhanced erosion on the outer bank and preferential deposition of coarse-grained sediment along the inner bank.
“It’s festival time again”: Sounding Tensions with/in an A/R/Tographical Inquiry into Participation in Competition Music Festivals
Creators: name: Duerksen, Jessica Anne
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2015
Subjects: Piano
Music Education
a/r/tography
arts-based research

description: Reflecting on my musical past, my annual participation in competition music festivals in solo and ensemble categories at the local and provincial levels shaped my music education as well as my development as a music educator. I inquire into how re/visiting moments of tension in my lived experiences as a participant in competition music festivals can facilitate my current praxis as artist, researcher and teacher. My inquiry is informed by understandings of a/r/tography as an arts-based educational research methodology. I inquire into these sites of music-making drawing on a theoretical framework of a soundscape, a concept originally proposed by Canadian composer R. Murray Schafer, to generate rhizomatic pathways with/in my research. Through this framework I consider how musical form informs the processes and structures of my thesis. Emphasizing a/r/tography as process-oriented inquiry, understandings emerge through music-making, arts-based journaling and autoethnographic renderings. Rhizomatic soundscapes evoke new understandings and questions contributing to literature on student perspectives participating in competition music festivals and teaching and learning in one-to-one music instruction.
A 3-D Numerical Study of Flow, Coherent Structures and Mechanisms Leading to Scour in a High Curvature 135° Channel Bend with and Without Submerged Groynes
Creators: name: Kashyap, Shalini
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: river erosion
submerged groynes
stream barbs
bend erosion
Large Eddy Simulation
Reynolds Averaged Navier Stokes Model
coherent structures
numerical modeling
bed hardening technique

description: This thesis focused on investigating flow, coherent structures, and mechanisms leading to scour around a series of three submerged groynes in a high curvature (radius of curvature (R)/channel width (B)=1.5) channel bend using a Large Eddy Simulation Numerical (LES) model. Flow was investigated during both an initial and a later stage of scour. The results showed that the groynes appeared effective in keeping the main core of high streamwise velocity away from the outer bank wall in the region where they were installed, although high potential still existed for local scour around the groynes. During the initial stage of scour, horseshoe vortices (HVs) showed the greatest propensity to induce scour immediately upstream of the groyne tips. During the later stage of scour, the HV in front of the first upstream groyne (G1) induced very high mean pressure fluctuations on the outer bank wall. Scour was also of very great concern around the tip of G1 due to severe mean bed pressure fluctuations. Downstream of the groyne field, the presence of a counter-rotating outer bank cell was capable of endangering the stability of the outer bank. The second focus of this thesis was to investigate flow in a 135° channel bend using both Reynolds Averaged Navier Stokes (RANS) and LES numerical models. The RANS study examined the effects of curvature ratio (R/B), and aspect ratio (B/H, where H is the inlet flow depth), on secondary circulation strength, and bed shear stresses. The study revealed that a decrease in R/B was associated with an increase in secondary circulation strength and peak bed shear stress. A change in B/H also substantially affected cross stream circulation strength. The LES study was conducted in a 135° (R/B = 1.5) bend flume with a fixed bed corresponding to near equilibrium scour conditions, and the results were compared to a similar high curvature 193° bend numerical study. Inner bank vortices and shear layers were present in both cases although their characteristics were substantially different. Distributions of boundary friction velocities, and turbulence were also quite different for each case.
Exploring architectural discourse and form through game-like on-line learning strategies
Creators: name: Scriver, Peter
name: Wyeld, Theodor
Publisher: name: Swinburne
Year: 2024

description: This paper describes and interprets the use of game-like on-line learning strategies in an introductory course on the theories and histories of 20th Century Architecture and Landscape. Analogies between games and design have been observed by both design theorists and educators (Hubbard, 1980; Woodbury, 2001). The game/design analogy is a particularly useful conceptual framework for design learning, we argue here, because of its robustness as both a theory of design-thinking, and a heuristic representation through which design discourse and practice may be subjected to playful yet critical scrutiny. Game-like learning strategies described in this paper enabled students to develop a critical 'feel for the games' (Bourdieu, 1990) inherent in the form-making and theoretical discourses of recent architectural history. We discuss the game-like dynamics and objectives of two interrelated on-line components of the course's assessment scheme. We make some preliminary observations on student experience with these exercises. We also reflect on relevant sub-issues in the discursive dynamics of on-line design learning, with particular regard to the use of on-line discussion-boards and VRML as a modelling medium portable across the internet that can enable the exploration of spatial and narrative aspects of design discourse in real time.
The Early History of PKU
Creators: name: Woolf, Louis I.
name: Adams, John
Publisher: name: Multidisciplinary Digital Publishing Institute
Year: 2020

description: The story of phenylketonuria (PKU) started in 1934 with Asbjørn Følling’s examination of two mentally retarded siblings from a Norwegian family. However, if their mother had not been so persistent in her search for somebody who could give her a reason why both her children were retarded, Asbjørn Følling’s name might never have been associated with PKU and surely the history of PKU would have started differently. In the short review below, the authors give a partly personal and therefore rare account of the early history of PKU, its treatment and the start of neonatal screening. Prof. Woolf is a pioneer of both the dietary treatment of PKU and neonatal screening; Mr. Adams is a long-time advocate for PKU patient interests.
Fast simulation of wavelength continuous WDM networks
Creators: name: Andrew, Lachlan L. H.
Publisher: name: Swinburne
Year: 2024

description: This paper considers the estimation of blocking probabilities of circuit-switched WDM networks with no wavelength converters and with fixed routing. It presents an importance sampling simulation technique for determining whether or not such a network meets a specific grade of service requirement, in the sense of all routes having blocking below a given threshold. It is especially efficient for networks with high grades of service, which take a long time to simulate using conventional methods.
Drought-Induced Regulatory Cascades and Their Effects on the Nutritional Quality of Developing Potato Tubers
Creators: name: Da Ros, Letitia
name: Elferjani, Raed
name: Soolanayakanahally, Raju
name: Kagale, Sateesh
name: Pahari, Shankar
name: Kulkarni, Manoj
name: Wahab, Jazeem
name: Bizimungu, Benoit
Publisher: name: Multidisciplinary Digital Publishing Institute
Year: 2020

description: Competition for scarce water resources and the continued effects of global warming exacerbate current constraints on potato crop production. While plants’ response to drought in above-ground tissues has been well documented, the regulatory cascades and subsequent nutritive changes in developing tubers have been largely unexplored. Using the commercial Canadian cultivar “Vigor”, plants were subjected to a gradual drought treatment under high tunnels causing a 4 °C increase in the canopy temperature. Tubers were sampled for RNAseq and metabolite analysis. Approximately 2600 genes and 3898 transcripts were differentially expressed by at least 4-fold in drought-stressed potato tubers, with 75% and 69% being down-regulated, respectively. A further 229 small RNAs were implicated in gene regulation during drought. Expression of several small RNA clusters negatively correlated with expression of their six target patatin genes, suggesting involvement in the regulation of storage proteins during drought. The comparison of protein homologues between Solanum tuberosum L. and Arabidopsis thaliana L. indicated that down-regulated genes were associated with phenylpropanoid and carotenoid biosynthesis. As is indicative of reduced flow through the phenylpropanoid pathway, phenylalanine accumulated in drought-stressed tubers. This suggests that there may be nutritive implications to drought stress occurring during the potato tuber bulking phase in sensitive cultivars.
Caraboctoninae Kraepelin 1905
Creators: name: Soleglad, Michael E.
name: Fet, Victor
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Iuridae

description: Subfamily Caraboctoninae Kraepelin, 1905   Type Genus. Caraboctonus Pocock, 1893.
 Synonyms.
 Hadruroidinae Mello-Leitão, 1934; type genus Hadruroides Pocock, 1893.
 Composition. This subfamily includes two genera, Caraboctonus and Hadruroides.
 Distribution. South America (Bolivia, Ecuador, Galapagos Islands, Chile, Peru).
 Biogeographic history. Of two genera of Caraboctoninae, Caraboctonus has clear adaptations to arid habitats, and is found only in the deserts of Chile and southern Peru (Lourenço, 1995).
 Diagnosis. Synapomorphies. Ventral surface of leg tarsus with heavily populated spinule cluster groups; leg tarsus unguicular spur blunted; genital papillae of male visible from genital operculum posterior edge; accessory trichobothrium found in patellar external em series. Important Symplesiomorphies. Chelal trichobothrium  Et 5  positioned on fixed finger; dorsal edge of cheliceral movable finger with two subdistal denticles; leg coxae IV elongated; lateral carinae partially present on metasomal segment IV; chela with “10-carinae” configuration.
description: Published as part of Soleglad, Michael E. & Fet, Victor, 2003, High-level systematics and phylogeny of the extant scorpions (Scorpiones: Orthosterni), pp. 1-175 in Euscorpius 2003 (11) on page 111, DOI: 10.18590/euscorpius.2003.vol2003.iss11.1, http://zenodo.org/record/13237351
Characterization of Humidity-Sensors based on Polymer Sensing Layer
Creators: name: Ali, Syed Fahad
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2022
Subjects: Inter Digital Transducer
Polyimide PI
EMFT sensors
HAST chamber (Highly Accelerated Stress test)

description: In this study various electrical properties of humidity sensors based on polyimide (PI) layer were characterized. The sensors were manufactured at the Fraunhofer Institute for Microsystems and Solid-State Technology (EMFT) as Inter Digital Transducers (IDT) with a polyimide layer. Changes in the electrical properties were due to a change in the permittivity of the PI layer under different environmental conditions. Using Wafer Prober, EMFT sensors were characterized at different temperatures and bias voltages. The capacitance measurements were conducted for a frequency range from 1 kHz to 1 MHz at the Fraunhofer EMFT. Two reference sensors were compared with HAST (Highly Accelerated Stress Test) built-in sensors to monitor humidity and temperature inside the HAST chamber. Afterward, EMFT sensors were tested at 130 °C and 85 % RH inside the HAST chamber.
MPEC 2024-V82 : 2024 VM1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 VM1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Characterization of cAMP-Specific Phosphodiesterase-4 (R)-[11C]Rolipram Small Animal Positron Emission Tomography and Application in a Streptozotocin-Induced Model of Hyperglycemia
Creators: name: Thomas, Adam J.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: Small Animal PET
PDE4
(R)-[11C]Rolipram

description: Elevated sympathetic nervous system (SNS) tone contributes to excess cardiac mortality associated with type 2 diabetes mellitus (T2DM). Chronic SNS stimulation has detrimental effects to the heart, in particular, with its cell signaling abilities. (R)-[11C]Rolipram small animal positron emission tomography (PET), an noninvasive nuclear imaging modality, was used to assess phosphodiesterase-4 (PDE4) alterations in a high fat diet (HFD), streptozotocin (STZ) induced model of hyperglycemia in rats. Prior to investigation in the animal model, characterization of (R)-[11C]rolipram small animal PET was completed. (R)-[11C]Rolipram binds specifically to PDE4 in the rat heart demonstrated by competitive blockade with (R)-rolipram with the PDE4 enzyme susceptible to saturation with increasing injected masses of unlabeled rolipram. (R)-[11C]Rolipram cardiac retention was elevated by acute norepinephrine stimulation via desipramine pharmacologic challenge. Quantitative (R)-[11C]rolipram PET was highly reproducible in the heart and presents an ideal avenue to investigate PDE4 alterations. (R)-[11C]rolipram small animal PET did not reveal changes in PDE4 expression and activity in STZ-treated hyperglycemic animals compared to STZ-treated euglycemic and control groups. In vitro measures of PDE4 enzyme expression and activity, with or without desipramine, were also not altered between treatment groups. Although (R)-[11C]rolipram small animal PET does not reveal PDE4 alterations in this animal model of diabetes, its utility to assess PDE4 alterations in other over active SNS pathologies, such as heart failure and obesity, remains.
Entwicklung einer Charakterisierungsmethode für Rohmaterialien von pulverbasierten additiven Fertigungsverfahren
Creators: name: Mathieu, Cedric
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: dissipierenden Eigenschaften
Pulver
Charakterisierung
MatBeyoNDT

description: Gegenstand dieser Forschungsarbeit ist die Entwicklung von Methoden zur Charakterisierung der dissipierenden Eigenschaften von Pulvern, um Designkriterien für additiv gefertigte Pulverdämpfer abzuleiten. Eine Schwingprüfanlage mit eigens entwickelten Aufsätzen und angepasster Messtechnik wurde eingesetzt, um Pulverproben präzise bei verschiedenen Frequenzen und Amplituden in Schwingung zu versetzen und dabei charakteristische Maße für die Energiedissipation durch Pulverdämpfung aufzudecken. Im Rahmen dieser Arbeit wurden zunächst mittels etablierter physikalischer Messmethoden Pulvereigenschaften wie beispielsweise Form, mittlerer Durchmesser, Schütt- und Klopfdichte ermittelt und anschließend anhand der eigens entwickelten Methoden Einflussgrößen, wie zum Beispiel der Verformungszustand des Pulvers, die Pulvermasse und die Anregungsfrequenz untersucht. Zwei verschiedene Modifikationen wurden im Rahmen dieser Arbeit erprobt: Der erste Aufbau gibt Aufschluss über die von Partikelwechselwirkung dominierte Dämpfung. Der zweite Aufbau ist angelehnt an ein Rheometer und liefert Informationen über die Reibungs-kräfte von Pulver an Grenzflächen. Beide Verfahren bieten komplementäre Einblicke in das dynamische Verhalten von Pulver, die relevant sind für die Anwendung in pulverintegrierten Bauteilen mit maßgeschneiderten Dämpfungseigenschaften. Die Ergebnisse aus der vor-liegenden Arbeit ermöglichen die Optimierung des Einsatzbereiches für spezifische Pulver, auf der in Zukunft Designstrategien für additiv gefertigte funktionsintegrierte Material-systeme aufbauen können.
The Role of Steroid Hormones, GREB1, and Reproductive Status in Ovarian Cancer Progression
Creators: name: Hodgkinson, Kendra
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2016
Subjects: estrogen
ovarian cancer

description: Estrogenic hormone replacement therapy increases the risk of developing ovarian cancer, and 17-β estradiol accelerates tumour growth in mouse models of this disease. One possible mediator of estrogen action is Growth Regulation by Estrogen in Breast Cancer 1 (GREB1), an estrogen receptor alpha (ESR1)-upregulated protein. GREB1 is required for hormone-driven proliferation of several breast and prostate cancer cell lines, but its role in tumour progression is unknown and its mechanism of action remains unclear. To determine the role of GREB1 in ovarian cancer, its expression and function were examined in ovarian cancer cell lines and mouse models. GREB1 was upregulated by estradiol, and overexpression and/or knockdown of GREB1 showed that GREB1 promotes proliferation and migration in ovarian cancer cells. GREB1 knockdown also slowed tumour growth and prolonged survival in mice engrafted with ovarian cancer cells. GREB1 expression was detected in human ovarian tumours of all major histotypes, with moderate to strong expression in 75-85% of serous, endometrioid, mucinous, and clear cell carcinomas. GREB1 mRNA levels correlated with ESR1 transcripts, but protein levels of GREB1 and ESR1 did not show a correlation in tumours. Serous, endometrioid and mucinous ovarian cancers were almost always positive for either ESR1 or GREB1 (59/60 tumours), which may imply a dependence on estrogen signalling pathways. GREB1 expression in normal tissues is mainly confined to the reproductive tract, suggesting that it may be useful as a diagnostic biomarker. GREB1 combined with PAX8 showed high efficacy in differentiating mucinous tumours of gastrointestinal vs. ovarian origin. Targeting GREB1 may inhibit tumour-promoting pathways downstream of ESR1 and could therefore prove more effective than current anti-estrogen therapies.
Free vibration and damping characteristics of carbon-fiber-reinforced sandwich cylindrical shells with 3D reentrant auxetic core
Creators: name: Chen, Yun-Long
name: Ma, Li
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: This article investigates the free vibration and damping characteristics of carbon fiber-reinforced sandwich cylindrical shells with 3D reentrant auxetic cores (3D RSCSs). Finite element analysis based on the modal strain energy method is utilized for simulated predictions, while a theoretical model based on the Rayleigh-Ritz method and third-order shear deformation theory (TOSDT) is used for theoretical predictions. Through a combination of hot press molding and interlocking assembly, all-composite 3D RSCSs specimens are manufactured. The modal characteristics of 3D RSCSs are obtained by hammer excitation modal tests. The prediction for modal properties shows good agreement with the experimental tests. Furthermore, the influences of fiber ply angles and geometric parameters on the natural frequency and damping loss factor are thoroughly investigated, which could be helpful to guide vibration analysis of lightweight metamaterials cylindrical shells with negative Poisson’s ratio and promote its engineering application in vibration reduction.