Concordia University Research Repository

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    21793 research outputs found

    Slow Track: Slowness and the Virtual Moving Image

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    This thesis offers a comprehensive investigation into virtual image production and analysis through the lens of slowness. It argues for deploying slowness as an aesthetic, perceptual, and dialectical strategy that can provide new insights into digital image-making practices and offer unique perspectives on the ontological status of the virtual image. Slowness has been utilised throughout the history of the moving image, particularly in contemporary art and cinema, as a means of understanding the nature of image-making. In contrast to the "spectacle" that characterises much of the visual culture surrounding digital image media, slowness can encourage contemplation from viewers, serving as a valuable tool for understanding and analysing images. This research conducts a thorough examination of computer-generated media from both technical and conceptual perspectives. It surveys the body of knowledge on slowness in art and culture and puts these theories, concepts, and techniques to the test in the computer-generated artwork Slow Track, as well as in accompanying creative explorations using real-time and extended reality technologies

    Urban Sprawl Metrics (USM) Toolset – User Manual for ArcMap

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    The Urban Sprawl Metrics (USM) Toolset is a geographic information system (GIS) toolset and was developed using Python and C+ languages. The USM Toolset was developed to facilitate the calculation of Weighted Urban Proliferation (WUP) and all components of urban sprawl for landscapes that include built-up areas, e.g., dispersion (DIS), land uptake per person (LUP). The Toolset is straightforward to use. The language of the user interface is English. The Toolset requires three input data: (1) the binary map of built-up areas (settlements areas and/or solitary buildings), in the ESRI raster format; (2) the map of reporting unit(s) (e.g., municipalities, districts, or a grid of a certain cell size) in geodatabase feature class or shapefile format; and (3) the number of inhabitants and jobs for the reporting unit(s) (this information has to be saved by the user in the attribute table of the reporting unit(s) shapefile). To practice the use of the Toolset, 13 examples are included

    Pisuktie ᐱᓱᒃᑎ: The walker: A co-creative documentary

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    This research-creation project consists of a short “making of '' film and a short documentary film called The Walker. It centers on the life story-history of Annie Pisuktie, a Black Inuk woman who migrates to Montreal as well as a land-based educational experience for her grandson Nicholas Inniss. In this film, co-created with Nicholas, Diego and Annie the main objective has been to aid him in reconnecting with his grandmother’s Black-Inuit identity and to the land his relatives come from. We repurpose film and photo archives to retell Annie and Nicholas’ story from an Afro- Inuk perspective. With this movie we hope to establish a creative initiative to reconnect intergenerational ties. Through the use of co-creative documentary filmmaking, counter-archival methodologies, land-based education and the use of Inuit oral tradition, this project seeks to bridge a communication gap between two generations and establish a bridge between Inuit youth. It fosters a creative medium where other Inuit youth can relink with their own complex family identities, geographies and histories.Through a video interview with Annie that is integrated into the film, the project foregrounds Annie’s experience of displacement. This research also addresses displacement and the conditions of modern migration of Inuit women to the South of Canada which stem from historical-colonial- societal complexities in Nunavut and the Eastern Canadian Arctic (poor infrastructure, housing issues, lack of health and social services, absence of post-secondary educational facilities, high cost of living and food insecurity to name a few). Key words: Black Inuit identity, Inuit youth, Inuit sovereignty, land-based education, mental health, Distant Early Warning Line, Southern Quebec Inuit Association, Inuit Traditional Knowledge, leadership, counter archival, research-creation, participatory media, co-creation

    The Impact of Academic Acculturation and Language Proficiency on International Students’ University Experience and Academic Success: A Longitudinal Study

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    The Canadian Academic English Language (CAEL) assessment is a proficiency test for university admission. Most research has focused on the paper edition, not the recent computer edition (CE). Validity research on other proficiency tests found that relationships between proficiency scores and academic achievement measures can be tenuous because other factors intervene in students’ chances to succeed. Research on academic success has examined academic acculturation (Berry, 1997) as one factor. However, the impact of acculturation on academic achievement has not been examined alongside language proficiency test scores. The current study investigated this issue by focusing on students with a range of CAEL scores and examining the relationship between CAEL-CE scores, academic achievement, and academic acculturation. Forty-four students at a Canadian English-medium university participated in the study. Students’ grade point averages were obtained, and an academic acculturation questionnaire was administered. A subset of participants partook in focus groups. The findings and their implications are discussed

    Scalable Automatic Service Composition using Genetic Algorithms

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    A composition of simple web services, each dedicated to performing a specific sub- task involved, proves to be a more competitive solution than an equivalent atomic web service for a complex requirement comprised of several sub-tasks. Composite services have been extensively researched and perfected in many aspects for over two decades, owing to benefits such as component re-usability, broader options for composition requesters, and the liberty to specialize for component providers. However, most studies in this field must acknowledge that each web service has a limited context in which it can successfully perform its tasks, the boundaries defined by the internal constraints imposed on the service by its providers. The restricted context-spaces of all such component services define the contextual boundaries of the composite service as a whole when used in a composition, making internal constraints an essential factor in composite service functionality. Due to their limited exposure, no systems have yet been proposed on the large-scale solution repository to cater to the specific verification of internal constraints imposed on components of a composite service. In this thesis, we propose a scalable automatic service composition capable of not only automatically constructing context-aware composite web services with internal constraints positioned for optimal resource utilization but also validating the generated compositions on a large-scale solution repository using the General Intensional Programming System (GIPSY) as a time- and cost-efficient simulation/execution environment

    Adult Sweetness

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    GRAND OPENING on the eve of 清明節 Qingming Festival, Adult Sweetness is a love letter, invitation, gesture of remembrance, and an offering to Cheung’s ancestors—past and future... Munch, crunch, and chewewew on a body of work that’s SWEET, TART, SALTY, BITTER, UMAMI Freshly squeezed from experiences of a Hong Kong-Chinese diasporic child growing up tirelessly grasping at their language ∴ culture. Nothing quite tastes like slowly distilled homesickness. ⚗

    Rétrofictions / Re Fictions / Fictions

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    John Latour will present his collaborative artist’s book project, Rétrofictions / Re Fictions / Fictions that explores how the erasure of history can lead to a creative space for new stories

    Very high cycle fatigue characterization of additive manufactured Ti-6Al-4V alloys

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    Very high cycle fatigue characterization of additive manufactured Ti-6Al-4V alloys Md Mehide Hasan Tusher A wide range of industries rely on the laser powder bed fusion (L-PBF) technique to produce intricate structures. The Ti-6Al-4V alloy has recently gained a lot of popularity due to its excellent properties in the manufacture of components by L-PBF technology. It is necessary to consider the fatigue performance of L-PBF-Ti-6Al-4V alloy in very high cycle fatigue regime (VHCF) so that the alloy can achieve a wide range of success in various different fields in the future. A study is conducted to examine the effects of stress-relieved (SR) heat treatment on the very high cycle fatigue (VHCF) performance of L-PBF -Ti-6Al-4V alloy in this investigation. There are many factors that can affect the response of the VHCF of L-PBF-Ti-6Al-4V alloy, and this study aims to identify key factors that have a significant influence on the VHCF response of this alloy by combining controlled platform temperatures with stress-relieved heat treatment. To accomplish this, experiments were conducted on Ti-6Al-4V alloy samples manufactured on a substrate with a temperature of 80°C. These samples were subjected to Ultrasonic fatigue testing machine, applying a fully tension-compression load (R= -1). To examine the fractured surfaces of the specimens, a Hitachi Regulus 8230 Scanning Electron Microscopy (SEM) was employed, enabling the analysis of crack-initiating features such as their nature, size, and location. Additionally, in order to identify any defect resulting from the manufacturing process, printed samples were inspected using an XT H225 X-ray μ-CT system (Nikon, MI, USA), allowing computed tomography (CT) observations on the gage sections of the samples

    Insight into TRAPPII assembly and function through characterization of naturally occurring TRAPP gene variants

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    Proteins and other macromolecules are sorted throughout the cell in membrane bound vesicles in a process known as membrane trafficking. Defects in this process are associated with various human disorders. The transport protein particle (TRAPP) complexes, including TRAPPII and TRAPPIII, are highly conserved multi-subunit protein complexes involved in subcellular membrane trafficking pathways. In my thesis, I assessed the effect of biallelic variants in TRAPPC10 and TRAPPC6B, two TRAPPII components, in individuals with a neurodevelopmental disorder characterized by microcephaly, intellectual disability, and brain atrophy. Here, I present comprehensive genetic, clinical, and functional data to assess the impact of these variants on TRAPPII stability, membrane trafficking, and ciliogenesis. Molecular studies revealed disruption of protein-protein interactions between mutant TRAPPC10 and its adaptor protein TRAPPC2L, and between mutant TRAPPC6B and TRAPPC3, affecting TRAPPII complex-specific members that lead to the disruption of TRAPPII assembly. Individuals with an alteration in the TRAPPC10 gene have no functional TRAPPC10 protein, which resulted in a reduction in levels of another TRAPPII component, TRAPPC9. Additionally, TRAPPC10-/- knockout cells exhibited a membrane trafficking defect that can be rescued by wild type- but not mutant TRAPPC10. Similarly, TRAPPC6B patient-derived fibroblasts displayed reduced levels of TRAPPC6B and TRAPPII complex-specific members, suggesting that variants in TRAPPC6B may preferentially affect TRAPPII functions compared to TRAPPIII functions. This observation was consistent with co-immunoprecipitation experiments that revealed significant enrichment of TRAPPC6B in TRAPPII, while its homologue, TRAPPC6A, co-precipitated equally with TRAPPII and TRAPPIII. Additionally, the TRAPPC6B patient-derived fibroblasts displayed reduced trafficking into the Golgi apparatus and Golgi fragmentation. These defects could be rescued by wild type TRAPPC6B. Furthermore, my studies also revealed that TRAPPC10-/- knockout and TRAPPC6B patient-derived fibroblasts showed reduced levels of ciliation. Finally, I demonstrated that translational read-through inducing drugs like Ataluren have the potential to rescue cellular defects attributed to nonsense mutations in the TRAPPC6B gene. This promising drug may serve as a viable treatment for TRAPPopathies, a group of neurodevelopmental, skeletal, and muscular disorders collectively associated with genetic variations in TRAPP genes. Overall, my research confirms the crucial role of TRAPPC10 and TRAPPC6B in brain development and function, and provides insights into the potential disease pathomolecular mechanism, which involves the disruption of TRAPPII assembly and functions. The findings suggest that the use of new therapeutic compounds like Ataluren could effectively address these disruptions in a specific patient population

    Detection and Isolation of Faults and Cyberattacks in Nonlinear Cyber-Physical Systems using Neural Networks

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    The theory of Cyber-physical systems (CPSs) has applications in critical infrastructures such as smart grids, manufacturing systems, transportation systems, and autonomous systems such as Unmanned Aerial Vehicles(UAVs). In the CPS, there is a coordination between communication, computation, and control. The communication link in CPS can be subjected to malicious cyberattacks. On the other hand, the physical system in CPS can be faced with different faults such as sensor, actuator, and component faults. Therefore, two significant and challenging problems in CPS can be the detection of faults and cyberattacks. These two threats are intrinsically distinctive and need different strategies to deal with when they occur. This research mainly focuses on providing a methodology to detect and isolate faults and cyberattacks. This work considers false data injection and replay attacks as security threats. Two different adaptive neural network-based detection methods are proposed in this thesis. These adaptive neural networks are able to detect, isolate, and estimate false data injection, and replay attacks. Another contribution of this thesis is to provide a scheme for isolating faults and cyberattacks (false data injection and replay attacks) by using virtual sensors on the plant side, which makes the simultaneous detection of faults and false data injection cyberattacks possible. A nonlinear model of a quadrotor is considered the case study, and the performance of the neural network-based schemes is evaluated through various numerical simulation scenarios

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