identifier: Zhao, Yimin  (2012) Visual Servoing For Robotic Positioning And Tracking Systems.  PhD thesis, Concordia University.

abstract:
Visual servoing is a robot control method in which camera sensors are used inside the control loop and visual feedback is introduced into the robot control loop to enhance the robot control performance in accomplishing tasks in unstructured environments. In general, visual servoing can be categorized into image-based visual servoing (IBVS), position-based visual servoing (PBVS), and hybrid approach. To improve the performance and robustness of visual servoing systems, the research on IBVS for robotic positioning and tracking systems mainly focuses on aspects of camera configuration, image features, pose estimation, and depth determination.
   In the first part of this research, two novel multiple camera configurations of visual servoing systems are proposed for robotic manufacturing systems for positioning large-scale workpieces. The main advantage of these two multiple camera configurations is that the depths of target objects or target features are constant or can be determined precisely by using computer vision. Hence the accuracy of the interaction matrix is guaranteed, and thus the positioning performances of visual servoing systems can be improved remarkably. The simulation results show that the proposed multiple camera configurations of visual servoing for large-scale manufacturing systems can satisfy the demand of high-precision positioning and assembly in the aerospace industry.
   In the second part of this research, two improved image features for planar central symmetrical-shaped objects are proposed based on image moment invariants, which can represent the pose of target objects with respect to camera frame. A visual servoing controller based on the proposed image moment features is designed and thus the control performance of the robotic tracking system is improved compared with the method based on the commonly used image moment features. Experimental results on a 6-DOF robot visual servoing system demonstrate the efficiency of the proposed method.
Lastly, to address the challenge of choosing proper image features for planar objects to get maximal decoupled structure of the interaction matrix, the neural network (NN) is applied as the estimator of target object poses with respect to camera frame based on the image moment invariants. Compared with previous methods, this scheme avoids image interaction matrix singularity and image local minima in IBVS. Furthermore, the analytical form of depth computation is given by using classical geometrical primitives and image moment invariants. A visual servoing controller is designed and the tracking performance is enhanced for robotic tracking systems. Experimental results on a 6-DOF robot system are provided to illustrate the effectiveness of the proposed scheme.


identifier: Elangovan, Selva Ganesh  (2012) Verification and Performance Analysis of Time Base Coded Data Protocol.  Masters thesis, Concordia University.

type: Thesis NonPeerReviewed

abstract:
The recent improvements in implantable medical devices combined with advanced wireless sensor networks are set to revolutionize the health-care industry by providing real-time, low-cost health monitoring for the patients. A new-field called Implantable Wireless Body Sensor Networks (IWBSN) has become a hot research topic because of its energy constraints and complex design. The main components of IWBSN are the base-station and implantable sensor nodes. The most important challenge is designing the sensor nodes which has to stay inside the body for long time. A novel protocol called ``Time-Based Coded Data" (TBCD) was formed in an attempt to reduce the energy consumption in the sensor nodes. While validating TBCD protocol clock drift and wireless body channel were not considered. Clock drift causes the sensor nodes to go out of synchronisation in an inconsiderable period of time. The human tissues provides a high path loss to the wireless channel.
This thesis proposes an error compensation method for both delay and clock drift. This helps the base-station and sensor nodes to stay synchronised for a longer period of time. The thesis also proposes a verification framework work which focusses on providing realistic situations to validate ultra low power IWBSNs. This framework enables to prove the functionality of TBCD protocol with delay and drift calculation and enables to find the optimum transmit power, sensitivity of the transceiver for TBCD protocol to work efficiently for an optimal distance between sensor nodes and the base-station. In addition, it has been proved that the life time of the battery of sensor nodes using TBCD protocol is greater when compared to the state-of-art protocols.


identifier: Krpan, Ronald  (2013) Wind-driven Rain on Buildings in Metro Vancouver: Parameters for Rain Penetration Testing of Window Assemblies.  Masters thesis, Concordia University.

abstract: Laboratory tests conducted on building assemblies to assess their resistance to rain penetration are commonly conducted by exposing the assemblies to air pressure differentials and water sprayed onto the outer surface to simulate wind-driven rain. The two primary test parameters are magnitude of air pressure differential and water spray rate. To assess the appropriateness of current standards for testing window assemblies exposed to real weather conditions in Metro Vancouver’s unique temperate rainforest climate, measurements of hourly wind-driven rain observed at building sites in Metro Vancouver are used to compute corresponding test conditions. Analysis of the observed site data leads to an expression for catch ratio as a function of wind speed. To establish a statistical basis for computing test conditions for specific return periods, the site data are linked to 25 years of average hourly historical data collected by Environment Canada from 1981 to 1996 at the Vancouver International Airport. Based on an extreme distribution analysis of wind speed and driving rain intensity, the water spray rate and air pressure differential corresponding to 10- and 20-year return periods are computed and compared to current standards. Results suggest that the standard for the intensity of rain impinged on window surfaces meets or exceeds measured conditions corresponding to a 20-year return period and are adequate for Metro Vancouver’s climate.


identifier: Roman, Dacian Emilian  (2012) Integrated micro-system for real time cell bio-chemical assessment.  PhD thesis, Concordia University.

abstract:
Miniaturized lab-on-a-chips and micro Total Analysis Systems (μTAS) have already penetrated the area of molecular diagnostics and brought the promise of a shift of paradigm in the way that medical professions will be conducted. Large spectrum of applications have been reported in the area of diagnosis and prognostics, regarding both qualitative and quantitative identification of targeted bio-entities. The advance of Micro Electro Mechanical Systems (MEMS) and microfluidic technologies opened a major challenge for a large number of researchers, industrial health and bio companies to invest their time and budget into the avenue of Point of Care (POC) health instruments or devices that help in the early detection of cancer cells within the human blood, via circulating malignant cells.
A large project that addresses the design of a point of care (POC) prototype in the area of bio-MEMS is presently ongoing in our laboratories. This device will enable the early detection of specific malignant species from a blood sample and integrates subprojects regarding the separation of malignant species from the blood sample, the characterization of these particles and the precise identification of the detected species. The detection method is based on the interaction between a microstructure, in this case a cantilever beam, and the reacting large organic molecules.
The aim of the present work is the detection part and represents the effort of the candidate to confirm theoretically and experimentally a series of pre-existing experimental results performed within the research group. The detection experiments take in consideration both the specific deflection obtained by means of direct measuring and the optical variation of the capillary angle during the interaction at micro-level between a pair antibody-antigen. The option of performing the assessment on an in-plane configuration rather than the out-of-plane method is also taken in consideration.
The results of this work can help benefiting both care-givers and patients if implemented in a clinical diagnostic device, contributing to an early detection of a malignant condition and the follow-up during the specialized treatment, implicitly reduced costs and improved quality of life.


identifier: Fotopoulos, Nellie  (2012) Studying the roles of RhoA and Anillin in C. elegans epidermal morphogenesis.  Masters thesis, Concordia University.

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abstract:
During development, epidermal morphogenesis encloses the C. elegans embryo in a layer of epidermal cells (by dorsal intercalation and ventral enclosure) and lengthens the embryo into the characteristic worm shape (elongation). These processes occur by a combination of cell shape changes, migration and adhesion. Genes that are involved in these events include Rho GTPases, nucleators of F-actin, nonmuscle myosin regulators and the catenin/cadherin complex that mediates junction formation.
Elongation occurs due to actin-myosin mediated contractions within the lateral epidermal cells. Rho kinase (LET-502), a RhoA effector that activates nonmuscle myosin, and myosin phosphatase (MEL-11), which down regulates myosin activity, are required for elongation.  Biochemical analyses performed in other organisms predict that RhoA (RHO-1) functions upstream of Rho kinase (LET-502) and nonmuscle myosin in the elongation pathway, however, due to the lack of rho-1 alleles, genetic tests had not verified this. We used a zygotic null allele of rho-1 recently generated by the Knockout Consortium to show that rho-1 is required for elongation. Crosses between rho-1 and elongation mutants, including mlc-4 (nonmuscle myosin regulatory light chain), let-502 (Rho-kinase) and mel-11 (myosin phosphatase regulatory subunit), confirmed rho-1 as an upstream regulator of nonmuscle myosin.

Ventral enclosure is the process where ventral epidermal cells migrate over the ventral surface of the embryo and meet at the midline to adhere with their contralateral neighbours. Some of the genes required for ventral enclosure include actin regulators such as Rac, Arp 2/3 and Wave/Scar (which nucleate the formation of branched F-actin to form lamellipodia) and adhesion components including the cadherin/catenin complex. Other genes contribute to ventral enclosure non-autonomously, such as vab-1 and vab-2, which are expressed in specific subsets of neuroblast cells that function as a substrate for the overlying ventral epidermal cells.  It is not fully understood how neuroblasts non-autonomously regulate epidermal cell migration. Here, we show that C. elegans anillin (ANI-1), a scaffold protein that binds to F-actin and active myosin, is non-autonomously required for ventral enclosure. In ani-1 RNAi embryos expressing AJM-1::GFP (a marker for epidermal cell junctions), ventral epidermal cells were mis-aligned and failed to adhere at the ventral surface of the embryo. Furthermore, imunostaining revealed that ANI-1 is primarily expressed in dividing neuroblast cells. These data suggest that neuroblasts may mechanically regulate ventral epidermal cell migration, shedding light on one of the mechanisms by which metazoan tissues may form in vivo.


identifier: li, jiaming  (2013) privacy-perserving social network data publishing for frequent sharing patterns.  Masters thesis, Concordia University.


identifier: Kittson, Cathy  (2013) Product Involvement as a Moderator in Hedonic Versus Utilitarian Attribute Trade-Offs.  Masters thesis, Concordia University.


identifier: Mandapuram, Santosh Chary  (2012) Biodynamic Responses of the Seated Occupants to Multi-Axis Whole-Body Vibration.  PhD thesis, Concordia University.

abstract:
Occupational on-road and off-road vehicle operators are exposed to low frequency whole-body vibration (WBV) of comprehensive magnitudes, and have shown a high prevalence of back disorders. Characterisation of seated body biodynamics response is considered vital for assessing potential injury risks of WBV and for developing effective biomechanical models for integration in the primary and secondary suspension design processes. The seated body biodynamic responses to single axis vibration have been investigated widely under vertical axis and a few under individual horizontal axis. The responses to simultaneous three-axis vibration, as encountered during vehicle driving, however, have been investigated in two recent studies. In this dissertation research, the biodynamic responses of seated body exposed to single as well as multiple axis vibration are characterised in terms of the apparent mass (APMS), vibration power absorbed (VPA) and seat-to-head vibration transmissibility (STHT) responses with both hands and back supports. The APMS responses are characterised considering two-driving-points formed by the buttocks-pan and upper-body backrest interfaces to fully describe the body-seat interactions. This study proposes a method to determine the total seated body APMS response from the forces measured at the two-driving points. Furthermore, it is shown that the commonly used frequency-response-function (H1), would suppress the contributions of the cross-axis responses under uncorrelated simultaneous multi-axis excitations. Consequently an alternative frequency response estimator (Hv) is applied for analyses of responses to uncorrelated multi-axis. The results obtained, clearly revealed the contributions of cross-axis responses, which were not evident in the reported responses derived using H1 function estimator. Further, it is shown that the total response along an axis can be estimated from super position of the direct and cross-axis response components along the same axis.
The seat-to-head vibration (STHT) transmissibility responses are also obtained so as to obtain additional target functions for defining the biodynamic models. The STHT responses also revealed considerable coupling effects of multi-axis vibration, when Hv function estimator is applied. The total VPA of the body under multi-axis is further derived considering the power absorption attributed to cross-axis body responses. A methodology is proposed to derive frequency-weightings similar to those in ISO 2631-1 using the absorbed power responses. Thus derived weightings based on total responses of the seated body under multi-axis uncorrelated vibration, are proposed to better evaluate the vibration exposure risk due to the whole-body multi-axis vibration. The results of the study suggest that the frequency-weightings derived for the back supported postures differ substantially from the current standardised weighting. The current weighting is thus believed to be applicable only for back unsupported sitting conditions.


identifier: Desnoyers, Rosika  (2012) A Genealogy of Pictorial Berlin Work: A History of Errors.  PhD thesis, Concordia University.

abstract: This thesis is the outcome of an interdisciplinary process. It was approached and developed within an art practice that is premised on the use and understanding of pictorial embroidery. The investigation into the emergence of Berlin work that is presented here cannot be distinguished from my artwork. The thesis is therefore an exercise in practice- led research and research-based art practice that operates as a genealogy. The method of genealogy allows me to advance knowledge through the investigation of a specific cultural practice that is located in the interplay of various historical forces and that defines needlepoint as an object of discourse. Berlin work emerged in Europe in the early nineteenth century. My research demonstrates that it was a form of product innovation that was associated with enlightenment notions of scientific and cultural progress, and was promoted as an art form modeled on painting. As Berlin work was gradually displaced by modernist conceptions of art, it began its career as a form of “submerged knowledge,” considered a “mistaken” art form devoid of aesthetic interest. By focusing on the English context, I offer an account of needlepainting, enlightenment practices of copying, the development of an industrial aesthetic, and the making of the modern amateur as constituent elements of Berlin work. I do so as a means to understand Berlin work in its moment of emergence and to consider what aspects were eclipsed when embroidery began to be thought of in terms of formalism and medium specificity. The methods used in this project offer a novel interpretation of needlepoint. By considering how it is that disciplinary forces have shaped needlepoint as a submerged practice, I provide an unprecedented view of it as more than meets the eye in the contemporary conjuncture. This written thesis accompanies the creation of a micro- archive of research-related materials, artefacts and artworks. Together, the written thesis and the micro-archive are a means for me to develop an art practice that incorporates a reflexive critique of its own making and of the disciplinary regimes of contemporary art.


identifier: Ng Cheng Hin, Jason  (2013) Life Cycle Optimization of a Residential Solar Combisystem for Minimum Cost, Energy Use and Exergy Destroyed.  Masters thesis, Concordia University.

abstract:
This thesis presents the optimization of a model of a solar combisystem installed in an energy efficient house in the climate of Montreal, Quebec. The work presented in the thesis includes: 1) A methodology for the optimization of a solar collector system based on four different objective functions; 2) The development of a computer-based platform for combisystem optimization; 3) Recommendations for the optimal configurations of a solar combisystem to minimize life cycle cost, life cycle energy use and life cycle exergy destroyed; and 4) The analysis of the performance of the hybrid stochastic, evolutionary and deterministic optimization approach.
The optimizations, using is a hybrid particle swarm and Hooke-Jeeves optimization algorithm, were able to reduce the life cycle cost of the combisystem by 19%, the life cycle energy use by 24%, the life cycle exergy destroyed by 33% and 24% for the technical boundary and physical boundary, respectively.
Due to the high cost of the solar collector technologies and the low price of electricity in Quebec, none of the configurations have acceptable financial payback periods. However, all of the configurations have energy payback times within 7 years.
For the life cycle exergy destroyed, using the technical boundary favors the use of electricity over solar energy due to the low exergy efficiency of the solar collectors. Using the physical boundary, on the other hand, favors the use of solar energy over electricity.


identifier: Peccia, Stephanie  (2012) Children’s perspectives of kindergarten and grade one: Analysis of narratives and drawings.  Masters thesis, Concordia University.

abstract:
Children’s Perspectives of Kindergarten and Grade One: Analysis of Narratives and Drawings

	It is widely supported that the transition to school is exceptionally important in establishing positive and healthy relationships which may have long-term implications on the rest of children’s school experiences (Entwisle & Alexander, 1998; La Paro & Pianta, 2000; Rimm-Kaufman & Pianta, 2005; Pianta, Belsky, Vandergrift, Houts, & Morrison, 2008).  As such, transition to school could be viewed as embedded in the various relationships children develop prior to and during this period (Entwisle & Alexander, 1998). In Canada, few studies have examined children’s perspectives on starting school and the role that their relationships take on during this process (Di Santo & Berman, 2012). This study examined children’s perceptions of kindergarten and grade one, and the social support they received throughout. Results indicated that children perceived a distinct shift from a play-oriented nature in kindergarten to an academic-oriented nature in grade one. They reported missing play and creative arts in grade one. Attitudes towards homework were mixed; while some children reported liking homework, many children reported that homework took away from their out of school play time. Children reported that their parents helped them get ready for school, helped them with homework, and provided affection and emotional support; whereas their teachers were mostly providers of directives (e.g., telling them what to do), and their peers and siblings were mostly providers of companionship. Overall, the children offered new insight by describing aspects they liked, disliked or missed during this transition, as well, by describing the role their parents, teachers, siblings and peers played in supporting this process.


identifier: Zheng, Jiannan  (2012) Image Processing and Classification Applications in Aerospace NDT and Honey Bee Health Monitoring.  Masters thesis, Concordia University.

abstract:
Fast development in image processing and classification techniques brings many new solutions to the challenges in engineering. In this thesis, image processing and classification techniques are introduced as a powerful inspection tool into non-destructive testing on aircraft parts and honey bee disease detection to improve inspection speed and accuracy of human inspectors.
Safety and reliability are the most important issues in aerospace industry, especially in high temperature and pressure turbine engine parts. Fluorescent Penetrant Inspection (FPI) is widely used in Non-Destructive Testing (NDT) on aircraft parts as an easy and powerful method. To improve efficiency and robustness in human inspection in FPI, an Advanced Automatic Inspection System (AAIS) is developed by using image processing and classification techniques in this thesis. The system can automatically detect, measure and classify the discontinuities from turbine blade FPI images.
As the world’s twelfth-largest honey producer, Canada’s honey bee suffers from big losses in the past few years. The detection of disease and disorder of bee colony in an early stage is critical to prevent more loss for the bee industry. To greatly improve the speed of the inspection while retain accuracy, an automatic health monitoring system is developed to inspect honey bee colony and detect disease and disorder. The system can monitor colony development and measure the proportion of unhealthy cells. And thus it can improve the efficiency and accuracy of bee colony inspection significantly.


identifier: Arbabi, Araz  (2012) Aerodynamic Inverse Shape Design of Compressor and Turbine Stages Using ANSYS-CFX.  Masters thesis, Concordia University.

abstract: An aerodynamic inverse shape design method is implemented into ANSYS-CFX using a User Defined Function. The implementation is validated first; the method is then assessed on a subsonic axial compressor stage and a turbine stage. The design method is based on specifying a target pressure distribution over the blade suction surface (or a target pressure loading) and a blade thickness distribution as the design variables. The blade wall moves with a fictitious velocity, which is derived from a balance of design and target momentum fluxes, in order to reach a blade shape that would produce the prescribed target pressure distribution. The wall movement obtained from the design method is computed in a User Defined Function through the CFX Expression Language; it is then communicated to ANSYS-CFX at each time step. In ANSYS-CFX, a cell-centered finite volume formulation is used for space discretization. The time accurate Reynolds-Averaged-Navier-Stokes (URANS) equations are written in an arbitrary Lagrangian-Eulerian (ALE) form so as to account for the wall and mesh movement. The k- turbulence model is used for both compressor and turbine stages. Once the UDF is validated, ANSYS-CFX is used to redesign the E/CO-3 axial compressor stage and the E/TU-3 axial turbine stage so as to improve the stage aerodynamic performance.


identifier: Pelletier, Louis  (2012) The Fellows Who Dress the Pictures: Montreal Film Exhibitors in the Days of Vertical Integration (1912-1952).  PhD thesis, Concordia University.

abstract: The city of Montreal offers a valuable case study for the investigation of the multiple ways local film programmes have been shaped by both local agents and vertically integrated transnational organizations in the classical era. This influence negotiated such major transitions as the construction of the first movie palaces in the early 1910s and the later rise of television at the turn of the 1950s. Using data collected in corporate records, newspapers, trade journals, censorship records, official statistics, and even novels and diaries, this thesis posits that Montreal occupied a peculiar position in the continental film market as it was simultaneously integrated in transnational distribution networks and home to a large francophone population. This situation permitted local entrepreneurs to wrest a significant share of the film market from the various distributors and exhibitors affiliated with US producers, largely through the importation and exhibition of French films. The city’s varied population and unique nature also helped local exhibitors affiliated with US-based organizations preserve some degree of control over the programming and policies of their theatres, even though this was an era marked by the growing vertical integration and monopolization of the film industry. This thesis further demonstrates that, while vertical integration did marginalize many of the city’s exhibitors, the need for alternative attractions, created by the independent theatres’ increasingly limited access to US products, emphasized the intermedial nature of film programmes, and consequently facilitated the emergence of local talent. The numerous performers trained in moving picture theatres soon participated in the creation of a popular theatrical tradition addressing the actual experiences and life conditions of Montrealers and, more particularly, of a French-Canadian population ill-represented by both its own backward-looking elite and the current political system.


identifier: Totskaya, Natalya  (2013) Social Capital and SME Growth: an Emerging Market Perspective.  PhD thesis, Concordia University.


identifier: Mares, Adrian  (2012) Du fascisme comme d'un État dans l'état d'esprit.  Masters thesis, Concordia University.

abstract: This thesis presents a reflection on fascism. The aim is to demonstrate its nature. To do so, two bodies of research will be considered: first, European and French history, and second, a literary work. The literary choice stopped on the work of Pierre Drieu La Rochelle, an author who seems to embody the essence of fascism, a spiritual fascism, and who allows me to say that there was a French fascism. After general considerations on fascism, my thesis will focus on the work of Drieu La Rochelle, trying to separate his thinking and political acts of his literary work. This distinction will only show the different components that, once articulated, reveal one of the most tragic and most lucid pens of the interwar period and a fascist mind.


identifier: Nazar, Holly A.  (2012) Reasoning Americans: The lost counterpublic of American Socialists and their national newspaper.  Masters thesis, Concordia University.

abstract: This thesis presents original research from the primary text of the Appeal to Reason newspaper (1895-1922) as evidence of the nature of the American Socialist counterpublic in the decade prior to the First World War. The text shows that turn-of-the-century American Socialists prioritized reacting and appealing to the mainstream public in their discourses, limiting their ability to build an independent worldview. However, the design and mode of production of the Appeal to Reason shows that while the paper has been criticized for its conventionally hierarchical structure, it had several features that made it possible for members of the American Socialist counterpublic to communicate in a way that was fundamentally separate from the dominant public sphere. The conclusion is that the American Socialist counterpublic did for a time constitute an alternative space of political action, although with significant limitations.


identifier: Sejpal, Lekha  (2013) Comparison of Two-level and Three-level Neutral-Point Clamped Inverters in Automotive Applications.  Masters thesis, Concordia University.

abstract: With the increasing popularity of multi-level inverters, the room for improvement of the performance of voltage source inverters has continuously been tested for various applications. The present project highlights the comparison of the conventional two-level inverter and the three-level Neutral-Point Clamped inverters for the application in automotive industry. The two inverters are compared for different conditions for losses, efficiency and the permissible temperature limit of operation for the non-ideal inverters that have been chosen for the application. The allowable limits of the switching frequencies for both the inverters have been discussed. The project highlights the DC-link balancing control which is the most commonly faced problem in case of a three-level Neutral-Point Clamped Inverter, with no additional circuit. Modifications of the modulation techniques for the realization of the DC-link balancing control have been proposed. Comparison of the total harmonic distortion of the line-to-line voltages at the outputs of the two and three-level inverters has been presented for both modulation techniques. The project also deals with the control of the Permanent Magnet Synchronous Motor drive using Field-Oriented Control Technique. From the detailed comparison, three-level Neutral-Point Clamped inverter has stood out as a better candidate when compared to the conventional, two-level inverter.


identifier: Malani, Ankit  (2012) Efficient Multicast Algorithms for Mesh and Torus Networks.  Masters thesis, Concordia University.

abstract:
With the increasing popularity of multicomputers, efficient way of communication within its processors has become a popular area of research. Multicomputers refer to a computer system that has multiple processors, they have high computational power and they can perform multiple tasks concurrently. Mesh and Torus are some of the commonly used network topologies in building multicomputer systems. Their performance highly depends on the underlying network communication such as multicast. Multicast is a communication method in which a message is sent from a source node to a certain number of destinations. Two major parameters used to evaluate multicast are time that a multicast process takes to deliver the message to all destinations and traffic that indicates the number of links used for this process. Research indicates that in general, it is NP- complete to find an optimal multicasting algorithm which is efficient on both time and traffic.
This thesis suggests two new algorithms to achieve multicast in mesh and torus networks. Extensive simulations of these algorithms show that in practice they perform better than existing ones.


identifier: Daigneault Bouchard, Marie-France  (2013) Manic 5 at Expo 67: Territorial Megastructure or the Connection of Three Spaces.  Masters thesis, Concordia University.

abstract:
Manic 5 is the largest multiple-arch and buttress dam in the world. It is part of the Manicouagan-Outardes Complex that marked the emergence of a Québécois expertise in hydroelectric production and transportation. Begun in 1959 and completed in 1968, the iconic dam is located on the Manicouagan River in the Côte-Nord region. In the summer of 1967, during the last stages of Manic 5’s construction, three cameras captured the daily activity of construction, from 10am to 10pm. The live footage was edited, transmitted and projected in full color in the Québec Industries pavilion on the grounds of Expo 67, Montréal’s world’s fair celebrating the centennial of Canada.
Drawing on multiple archival resources such as printed and filmic promotional documents of the dam, photographs, architectural drawings of the pavilion, and newspaper articles, this research departs from a photomontage representing the spectacle of Manic 5 at Expo 67 and aims to uncover its history while contextualizing it into the history of twentieth-century architecture. I consider this event and its underlying material presence as a “territorial megastructure,” based on the architectural concept of the megastructure developed during the 1960s and in which Montréal had a prominent role, mainly through its hosting of Expo 67. Manic 5, a space of production, and Expo 67, a space of consumption, can each be considered a megastructure in and of itself, although they will here be analysed in relation to their physical and virtual connection over a territory covering more than 800 kilometres, the space of transmission


identifier: Wicks, Jennifer  (2012) Constructing a Safe Space Together: Community Art Education For Women In A Reintegration Program.  Masters thesis, Concordia University.

abstract:
This art education master’s teaching thesis is a qualitative research study using
grounded theory and action research, informed by participatory action research,
to explore the notion of safe space. It examines different teaching methods and
pedagogical strategies in conjunction with the aesthetics and design of the
physical space, which can allow us to develop an atmosphere in the art
classroom that allows students to feel more comfortable, and consequently
create without restraint. This study was conducted over the course of five art
classes with nine participants from a reintegration program for women who have
recently experienced homelessness. Data was collected through audio-recorded
focus groups, photographs, researcher’s field notes and participants’ journal
entries.


identifier: Lemon, Joanna R.  (2013) Memories of a Wall in Old Montreal – Reassembling the Puzzle of the Past.  Masters thesis, Concordia University.

abstract:
An existing five storey building in Old Montreal has an exposed wall revealing a remarkable history of contributions from at least five building states, the earliest of which was constructed in the eighteenth century.  Using the framework of semiotics as proposed by Charles Saunders Peirce (1839-1914) and Jacques Derrida’s (1930-2004) exploration of the parergon, this thesis examines aspects of the wall relative to its history, in relation to the presentation of official narratives and national identity, as well as to the experience of an Anglophone Montrealer’s personal history and identity.
	Archival sources such as those of the City of Montreal, Adhémar and the Ministère des Resources naturelles et Faunes, along with the Bibliothèque national and ArchivesCanadaFrance.org, provide the historical basis for the reconstruction of the development of this site, a wall that only in its latest form is exposed in such as way as to inspire this research. Works by Andreas Huyssen, Alain Gordon, M. Christine Boyer, and Pierre Nora form the basis of the question regarding the building of national narratives as they relate to the quarter of Old Montreal. This thesis culminates in a better understanding of my own experience as a fifth-generation, bilingual English Montrealer in a predominantly Francophone city.


identifier: McGurrin, Jean-Philippe  (2012) Les intersections primates : étude d’une architecture autre.  Masters thesis, Concordia University.

abstract:
Le sanctuaire de chimpanzés de la Fondation Fauna, situé à Carignan, Québec, ouvrait ses portes à quinze chimpanzés en 1997. Après avoir servi de cobayes de laboratoire pendant de longues années, ils arrivaient en sol québécois avec leurs cicatrices physiques et psychologiques pour y entamer une retraite bien méritée. Sur le terrain de Gloria Grow et Richard Allan, les fondateurs du sanctuaire, ils trouvaient une demeure au design étrange dont l’architecture avait été conçue tant en fonction de leurs besoins primaires que de leurs blessures. À travers la fréquentation prolongée d’espaces qui les avaient rendus esclaves de notre regard et, dans plusieurs cas, porteurs de nos propres maladies (dont le VIH), ils avaient en commun d’avoir été, pour ainsi dire, infectés d’humanité.

          Ce mémoire propose une analyse en profondeur de l’architecture complexe du sanctuaire de Fauna : une immense cage en mouvement. Sur la trace des différents milieux occupés par les chimpanzés de Fauna, j’aborderai leur sanctuaire en tant qu’« espèce » et œuvre d’art. D’après un avis municipal paru en 1999, le sanctuaire de Fauna exploite ses installations selon un permis de jardin zoologique et se conforme à certains des codes de sécurité des laboratoires de recherche biomédicale. La réflexion que je pose va en ce sens et présente le sanctuaire tel un amalgame constitué de certaines de leurs structures. Je démontrerai de quelles façons il se réapproprie des éléments du design de ces espaces de mort à travers un renversement total de leurs fonctions, exposant ainsi le sanctuaire comme un espace de vie synonyme d’espoir.


identifier: Bradley, Megan  (2013) Negotiating the Global.  Masters thesis, Concordia University.

title: Negotiating the Global

abstract: This thesis examines four instances between 2002 and 2012 where Canadian artists have participated in international exhibitions: in all these cases the Canadian identity of the artists in question is de-emphasized, while a new global identity comes into play:  David Altmejd at the 2003 Istanbul Biennial; Ingrid Bachmann at the 2012 Havana Biennial; Brian Jungen at the 2009 Basel Art Fair, and Gareth Moore at the 2012 dOCUMENTA exhibition in Kassel.  This study interrogates the shifting meaning of “global art” at the present time, by evaluating the circumstances of these institutions and tracking the curatorial outlook, the artworks presented and the location and context of each global encounter. The theoretical approaches of contemporary thinkers such as Arjun Appadurai, Ali Behdad, Okwui Enwezor, Nikos Papastergiadis and John Ralston Saul provide  a framework for thinking about the way the global has been positioned.  The case studies identify how the global can be considered as a paradigm that expands beyond the easy opposition of global vs. local, or global vs. national, by considering instead the complex set of issues that arise when artists participate in global exhibitions.  The global paradigm opens up the discourse of contemporary art to a multitude of possibilities for exchange and interaction.


identifier: Pipe, Melissa  (2013) Shaping a low woodwind: representations of the bassoon in orchestration and jazz arranging books with adjacent composition portfolio.  Masters thesis, Concordia University.

abstract:
The bassoon is seldom seen in the jazz world – surely the relative scarcity of players within the genre has limited this woodwind’s ability to carve itself a respectable place in the pantheon of jazz instruments. Although there is a rich and noble, though little known, history of jazz bassoon playing, the instrument is usually thought of as a strictly “classical” instrument. And not just a classical instrument: more often than not, it is popularly, though unfairly, referred to as the “clown of the orchestra”. This thesis examines the way the bassoon is described in classical orchestration and jazz arranging books, in order to look at the language used when describing this unique woodwind, as well as looking at how we go about expressing/verbalizing sound at large. As composers and arrangers comprise the primary audience for these didactic works, we must wonder if the way it is described to these creators and orchestrators may be partly responsible for perpetuating the bassoon = buffoon myth… Adjacent to this written portion of the thesis are six original compositions for jazz sextet featuring the bassoon, written to explore the wide range of sonic expression this instrument is capable of rendering outside of the classical realm.

The composition portfolio contains pieces composed and arranged for trumpet / flugelhorn, tenor sax / bass clarinet, bassoon, piano, bass and drums.

Titles of the pieces:

ici, ainsi
In As Much
So Little Time
Dàgur
E.K.’s Blues
In Passing


identifier: Le, Thai Hoa  (2013) Freight Train Optimization and Simulation.  Masters thesis, Concordia University.

abstract:
Train scheduling has already received a lot of attention, whether for passenger or freight trains. While the volume of goods transport has increased over the years, extensions of railway systems are very rare because they represent major investments for railway companies or governments. Accordingly, the railway companies are often operating freight trains in a system that is close to saturation. It follows that a very effective planning and optimization of the rail network is needed.

While passenger train schedules are relatively static and cyclic, and can be planned months ahead, freight train schedules are designed with a much shorter planning time period, sometimes even one day or few hours before train departures. Moreover, passenger train schedules must obey some strict time window constraints as trains must arrive and depart from stations in order for passengers to get off/on the trains according to the posted schedule.
On the opposite, the schedule of the freight trains may vary according to the train lengths or loads, i.e., freight trains have a much greater variability in their average speed. Lastly, the track configuration of the freight trains does not have a dedicated direction as it is often the case for passenger trains. For all those reasons, the scheduling of freight trains is more complex than for passenger trains.

In this thesis, we propose a new dynamic row/column management algorithm for the schedule of freight trains in a single/double track railway mesh network system. While many works have already been devoted to train scheduling, previously published optimization models all suffer from scalability issues. Moreover, very few of them take into account the number of alternate tracks in the railway stations or in the sidings for train meets, as well as the delay incurred by trains that take sidings. We propose a non time-indexed model, which takes into account such constraints, and we design an original solution scheme with iterative additions/removals of constraints/variables in order to remain with a manageable sized mixed integer linear program, while still ensuring convergence to an optimal solution. Numerical results are presented on several data instances of CPR (Canada Pacific Railway) on the Vancouver-Calgary corridor, one of the busiest corridors in their railway system.

In addition, we developed a simulation tool within the Arena framework, for the scheduling of freight trains. Comparisons of the simulation and optimization tools are made, together with a review of the pros and cons of simulation against optimization tools.


identifier: Gallo, Peter  (2012) Bio-Aesthetics and The Artist as Case History.  PhD thesis, Concordia University.

abstract:
Recent critical reappraisals have undermined the coherence – and validity – of the principles defining modern art and artistic production. Traditional art historical categories, periodizations, sub-periodizations, even the very divisions modernism and postmodernism, while useful, are no longer sufficient to define a history of the artistic object, or artistic identity for the modern age. I propose that a biopolitical perspective, with a shift in focus away from the object and towards the artistic body restores, in part, a coherent narrative to a modern art history. This thesis sketches the contours of an artistic sub-category I have coined “bio-aesthetics” within the framework of biopolitics, drawing on the ideas of Michel Foucault, Giorgio Agamben and Roberto Esposito. I locate a set of clinical mechanisms within the domains of aesthetics, artistic perception, subjectivity and performativity. My primary thesis is that the drive toward embodiment, toward the referent, or perhaps more precisely toward the real, expressed in formalism’s zeal for medium specificity, and in the modern aesthetic project of grounding artistic experience within the somatic, was set into play by a clinical configuration that emerged from the eighteenth century’s laboratories and clinics, expounding a life science of bodies.
The corpus of my dissertation focuses on four significant moments within an archaeological schema spanning the eighteenth to the late twentieth centuries. Each chapter focuses on significant historical materializations of the bio-aesthetic, and together form a historical progression from a biological corporealisation of the sensate, to the psycho-medical individualization of the artist subject, or perhaps, the clinical performer. My corpus begins with the eighteenth-century formalization of a somatically-based aesthetics, culminating in the aesthetics of Immanuel Kant. By separating the action of aesthetic contemplation from rational logos, Kant positioned aesthetic experience and artistic creativity in a place of peculiarity or pathology. I then trace the repercussions of bio-aestheticization both in the emergence of the flat picture plane as an index of the clinicalization of artistic visual consciousness, and in the concurrent psycho-medical conflation of artistic subjectivity with pathology in nineteenth-century texts on degeneracy. I conclude with the development, in the later part of the twentieth century, of a new modality of clinical performativity, taking up the self-identification of artists with a psycho-medical identity, and the embracing of medical themes and ordeals as artistic subjects. This collapse of a metaphoric position of aesthetic difference with an actual medical history and body is explored on two levels: first, in a consideration twentieth-century high-modernist criticism and in an examination of minimalist and performance-based works, including those of Beuys, Wilke, Morris and Gober. The irony that emerges from my study is that coherence is achieved within the heroic modernist pursuit of purity of medium and individual genius by a corresponding a master narrative of illness.


identifier: Nguyen, Thi Truc Minh  (2013) Curation and analysis of tRNA and aminoacyl-tRNA synthetase genes in the nuclear genome of Myceliophthora thermophila.  Masters thesis, Concordia University.

abstract: Transfer ribonucleic acids (tRNAs) and aminoacyl-tRNA synthetases (AARSs) have long been known for their indispensable roles in the translational process to synthesize proteins in living cells. Therefore, detecting and analyzing the comprehensive sets of tRNA and AARS genes would enhance understanding of the translation system and the results could potentially be used to optimize the translation efficiency for the protein production in the organisms of interest. This research aims to detect the complete sets of cytoplasmic tRNA genes and AARS genes from the nuclear genome of Myceliophthora thermophila, a filamentous fungus used in the enzyme production industry and the first thermophilic eukaryote with a finished genome sequence. In this study, 194 cytoplasmic tRNA genes and 35 aminoacyl-tRNA synthetase genes in M. thermophila were determined by comparing the gene models predicted from the genome with the sequenced RNAs and the experimentally characterized tRNA and AARS genes. The experimentally verified tRNA genes in M. thermophila can encode all of the 20 universal amino acids. The 35 AARS genes code for cytoplasmic and mitochondrial AARS enzymes of all of the 20 amino acid specificities except for the mitochondrial glutaminyl-tRNA synthetase. Four commonly used tools – tRNAscan-SE, SPLITSX, ARAGORN and tRNAfinder – were deployed for the tRNA gene prediction, and we showed that tRNAscan-SE and SPLITSX give more accurate results than ARAGORN and tRNAfinder. Analysis of the tRNA genes showed that there are significant correlations between tRNA gene number in the genome and tRNA abundance in the cell, as well as between tRNA gene number and codon usage bias of protein-encoding genes in M. thermophila. Based on the complete tRNA gene set and the codon frequencies in the protein-encoding gene set, a set of preferred codons in M. thermophila was determined. The manually curated tRNA and AARS genes of M. thermophila, as well as the experimentally characterized ones collected from tRNA and protein databases along with the supporting literature provided in this study, can be used as reliable datasets for tRNA and AARS gene annotation processes.


identifier: Amar, Vanessa  (2012) Development of a fear-avoidance scale for athletes.  Masters thesis, Concordia University.

abstract:
The fear-avoidance model (FAM) was developed in an attempt to explain the process by which the “pain experience” and “pain behaviour” becomes dissociated from the actual “pain sensation” in individuals who manifest the phenomenon of exaggerated pain perception. High levels of fear-avoidance can lead to chronic pain and disability. Existing fear-avoidance questionnaires have all been developed for the general population. These questionnaires may not be specific enough to fully assess fear-avoidance in an athletic population which copes with pain differently than the general population. The aim of our study was to develop the Athletic Fear Avoidance Questionnaire (AFAQ) and validate it.
	A total of 9 experts in the fields of athletic therapy, sport psychology and fear-avoidance were used to generate and rate items for the AFAQ. The final version of the questionnaire includes 10 items who reached statistical significance (p<0.05) to establish good internal validity.
	Ninety-nine varsity athletes filled out the AFAQ along with the Fear Avoidance Beliefs Questionnaire (FABQ) and the Pain Catastrophising Scale (PCS). Concurrent validity was established with significant correlations between the AFAQ and the FABQ-PA  (r= 0.352, p = 0.000) as well as with the PCS (r = 0.587, p = 0.000). High internal consistency of our questionnaire was established with a Cronbach’s Alpha coefficient of 0.805.
	Therefore, our results indicate that we developed a questionnaire with good internal and external validity. The AFAQ is a scale that measures sports injury-related fear-avoidance in athletes and could be used to identify potential negative psychological barrier to rehabilitation.


identifier: Qiu, Jin  (1994) Production control and capacity configuration.  PhD thesis, Concordia University.

abstract: Production control and capacity configuration policies are critical to a manufacturing firm for effective inventory control. In the first part of this dissertation, a Dynamic Programming model and a solution algorithm are developed to obtain an optimal (near-optimal) production control policy. The solution algorithm is able to produce an extremely good policy under mild conditions, but is applicable only to problems with a limited number of products. For problems involving a large number of products, a heuristic algorithm based on a decomposition/aggregation scheme is then proposed. This algorithm overcomes the computational difficulty typically associated with Dynamic Programming problems with a large number of state dimensions. Computational test results are reported to show the performance of the policy generated by the heuristic algorithm. In the second part of the dissertation, the production lead time and operational cost performance of two capacity configurations are analyzed. Models are developed for each configuration to determine the amount of capacity which minimizes the total capacity acquisition and operational costs, including the inventory cost. Computational test results are presented to study the impact of problem characteristics on the superiority of each configuration.


identifier: Chreim, Samia  (2000) The evolution of organizational identity : a discursive study.  PhD thesis, Concordia University.

abstract: Cette étude vise a explorer le développement de l'identité dans un contexte de changement. Les questions de recherche adoptées sont les suivantes: quels aspects de l'identité organisationnelle sont remis en question dans un contexte de changement? Est-ce que l'identité évolue dans un contexte de changement? et Comment? Quels sont les facteurs contextuels associés avec l'évolution?   Le cadre théorique adopté dans cette étude met l'accent sur l'importance du discours des dirigeants dans l'élaboration de l'identité organisationnelle. En présentant l'identité aux auditoires, les dirigeants expriment et construisent l'identité de l'organisation (Scott et Lane, 2000). Comme macroacteurs (Callon et Latour, 1985), ils possèdent plus de povoir que les autres groupes d'intérêt (stakeholders ) dans la définition de cette identité. Ceci est surtout le cas dans un contexte de changement où lés stakeholders accordent beaucoup d'attention au discours des dirigeants (Schweiger et DeNisi, 1991).   Cette recherche vise a étudier le développement de l'identité organisationnelle dans le discours des dirigeants. La littérature sur l'identité organisationnelle ne fournit pas de réponses claires à la question concernant la continuité ou le changement dans cette identité. C'est pourquoi nous avons choisi d'effectuer une étude exploratoire qui utilise l'approche de la théorie ancrée ( grounded-theory approach ) proposée par Glaser et Strauss (1967) et Strauss et Corbin (1990). Dans cette approche, la théorie émerge des données. Le chercheur part d'une question large qui définit le sujet d'intérêt mais qui ne vise pas a établir le lien entre une variable dépendante et une variable indépendante (Strauss et Corbin, 1990). Cette approche est pertinente pour l'étude des données qualitatives qui sont bien les données étudiées dans cette recherche. L'étude du discours doit tenir compte de la richesse du contexte (Hanks, 1989), et cette richesse se cerne mieux à partir des données qualitatives (Miles and Huberman, 1994). Pour effectuer l'étude du développement de l'identité dans le discours, deux entreprises qui ont vécu des changements des dernières années ont été choisies comme sujets de recherche: la Banque Royale et la Banque de Montréal. Le discours identitaire de ces deux entreprises dans les rapports annuels des années 1985 à 1997 (inclusivement) a été tracé. Plus précisément une étude des  «thèmes identitaires» a été effectuée. L'étude suit le développement des «thèmes» dans le discours de ces entreprises, ainsi que le contexte dans lequel ce discours est énoncé. Les facteurs contextuels associés avec le développement de ces thèmes identitaires sont alors tracés. (Abstract shortened by UMI.)


identifier: Baronet, Jacques  (2000) La créativité en action : trois cas d'entrepreneurship.  PhD thesis, Concordia University.

abstract: In this doctoral thesis, we have tried to find an answer to the two main questions in the field of entrepreneurship: (1) who is the entrepreneur? And (2) what does he do? We feel confident that the exploratory study we conducted accomplished that, at least partially.   The field of entrepreneurship is a domain still searching for a definition, a unifying paradigm which could explain and predict this empirical phenomenon. A consensus exists around the necessity of using qualitative methods to study entrepreneurship and the necessity of studying at the same time the entrepreneur and what he does.   In this thesis, if we have not yet discovered a definitive answer to these two fundamental questions, we have discovered the first elements of an answer. In order to do so, we have used qualitative methods to study in depth three cases of entrepreneurship in depth. We have also reversed a concept generally accepted in entrepreneurship, i.e. that there is an element of innovation, of creativity, in entrepreneurship. Indeed, we started with the idea that entrepreneurship is included within a much larger phenomenon: creativity. In this sense, entrepreneurship would be an example of creativity applied to the recognition of opportunities and the creation of new ventures.   Thus, we have defined the distinctive character of the creative individual as made up of three main components: (1) a creative psychodynamics which urges the individual to define a personal identity by himself and to assert it through creative endeavors, to constantly search to surpass his dissatisfactions; (2) a mild bipolarity which enables him to naturally and regularly develop multiple and original associations in many different situations, and to seize the incongruities existing in a particular field and thus perceive the opportunities lying outside others' field of vision, and (3) an ego strength superior to the average individual which gives him the strength to face all life's difficulties, and more particularly the profound anguish associated with the creative process. Finally, we have defined the creative process as made up of five successive steps: (1) a creative shock in which a mostly unconscious image, intuition, or vision is imposed on the creative individual; (2) a more conscious decoding of the signs and symbols seized in the previous step; (3) a translation of these signs and symbols into a code and material known within a specific field; (4) the material composition itself, and (5) the exhibition of the work to the outside world.   Our research also allowed us to define the entrepreneurial process since we were able to use and slightly modify our model of the creative process. (Abstract shortened by UMI.)


identifier: Arnaoudova, Venera  (2008) Defining substitutability criteria for object oriented components.  Masters thesis, Concordia University.

abstract: Component-Based Software Development (CBSD) promotes software reusability by allowing new functionalities to be added and existing functionalities to be removed or replaced easily. However, high reusability comes with its own cost, namely the difficulty in selecting suitable candidates for adaptation tasks. Even though research has been conducted toward identification of such components, current methods rely on an existing system specification, which is more often either not available or inconsistent with other artifacts such as implementation. In this dissertation, we complement current works by proposing a novel approach to compare software components at source code level independent on the existence, or otherwise, of the specification. We consider Open-Source Software (OSS) components written in Java at three levels of granularity, namely methods, types and packages. Consequently, we define substitutability criteria at three levels of abstraction and provide metrics indicating the degree of matching of two components. We provide automation and tool support through an Eclipse plug-in and we demonstrate our method through a case study. We expect our approach to be beneficial to maintainers during the selection of suitable candidate components.


identifier: Patel, Chiragkumar  (2008) Software clustering using dynamic analysis and static dependencies.  Masters thesis, Concordia University.

abstract: Maintaining a large software system is not an easy task. The problem is that software engineers must understand various parts of the system prior to performing the maintenance task at hand.   The comprehension process of an existing system can be made easier if the system is decomposed into smaller and more manageable clusters; software engineers can focus on analyzing only the subsystems needed to solve the maintenance task at hand. There exists several software clustering techniques, among which the most predominant ones are based on the analysis of the source code. However, due to the increasing complexity of software, we argue that this structural clustering is no longer sufficient.   In this thesis, we present a novel software clustering approach that combines dynamic and static analysis. Dynamic analysis is used to build a stable core skeleton decomposition of the system by measuring the similarity between the system's components according to the number of software features they implement. Static analysis is used to enrich the skeleton decomposition by adding the components that were not clustered using dynamic analysis.   A case study involving two object-oriented systems is presented to evaluate the applicability and effectiveness of our approach.


identifier: Djabir, Twahibu Kambi  (2008) Essays on monetary integration in Southern Africa.  PhD thesis, Concordia University.

abstract: Following the successful introduction of the euro in Western Europe, several regional economic blocs in Africa are planning to launch a common currency as an intermediary step towards the emergence of a single currency for the entire continent. The purpose of this dissertation is to tackle several economic issues related to monetary integration and empirically apply it to the context of the Southern Africa Development Community (SADC).   In the first essay, we estimate trade potentials for southern African countries using the gravity model approach. More specifically, we use the level of infra-regional trade as predicted by the gravity model and compared it with the observed trade in order to assess the trade potentials in the region, as well as the South Africa's trade potentials with its SADC partners. Our results demonstrate that the observed trade flows among SADC countries are largely greater than the ones predicted by the empirical model. We also found that other SADC member countries over-trade with respect to South Africa. However, there are still some unexploited trade potentials for several pairs of SADC countries.   The second essay deals with the issue of the choice for the optimal nominal currency anchor to which the national currencies of the region have to be pegged to. Using a panel of 63 countries, we obtained OCA indices à la Bayoumi and Eichengreen for SADC countries vis-à-vis five potential nominal anchor currencies, and we find that the optimal nominal currency anchor for these countries is the US dollar. We also find several pairs of SADC countries which are suitable for a common currency on the basis of the estimated OCA indices.   In the last essay, we empirically assess the expandability of the CMA within the SADC by investigating the convergence of monetary policies of each SADC member to that of South Africa, a proxy for CMA. Empirical tests show evidence of long-run relationship between South Africa and two countries, namely Botswana and Mauritius suggesting that these countries may able to follow the leadership of the South African Reserve Bank. Following the results of the Granger-causality test, the leadership hypothesis in the strict sense is rejected for the case of Mauritius and Botswana. However, the only other country which shows evidence of following the South Africa's leadership in terms of Granger-causality is Malawi. [PUBLICATION ABSTRACT]


identifier: Yu, Kun Nam James  (2008) Three essays in estimating intertemporal substitution elasticities of home production.  PhD thesis, Concordia University.

abstract: This dissertation contains three essays that estimate the intertemporal substitution elasticities of a life cycle model that includes home production. The first essay studies the impact of including home work hours in the estimated intertemporal substitution elasticity of labor supply. We use the employment information of employed males obtained from Panel Study in Income Dynamics and Canadian Time Use datasets. We then estimate the elasticities using a two-stage estimation strategy. Our results suggest that the estimated inter-temporal substitution elasticity in the extended home production life cycle model is lower than the one in standard life cycle model without including home production. Our results are in contrast to the results obtained by Rupert et al. (2000), where they report the estimated inter-temporal substitution elasticity in the home production model to be higher than the one in standard life cycle model.   The second essay critically evaluates the estimated results obtained by Rupert et al. (2000). We investigate the estimated employed male labor supply elasticities of the home production function by using the Three Time Use datasets that are employed by Rupert et al. By utilizing the two-stage estimation strategy and the generalized least square estimating method, we find that there is no evidence indicating that the estimated inter-temporal labor elasticities of employed male with home production are higher than the ones without home production.   The final essay measures the inter-temporal labor supply elasticities with home production using various employed female datasets as well as different estimation methods. Using the same methodology and datasets as the previous two essays, we find that the empirical results do not provide any conclusive evidence to support the hypothesis that the home production function has increased the estimated intertemporal substitution elasticity of employed female compared to the previous results estimated without home production. Overall, the estimated results of all three essays indicate that there seems to be some willingness to substitute total (market and home) hours over the life cycle for both the employed male group and the employed female group, but it is most likely smaller than the willingness to substitute market hours over the life cycle in response to wage changes. [PUBLICATION ABSTRACT]


identifier: Liu, Yong Chang  (2008) Logic diagram verification by modular supervisory control of discrete-event system.  Masters thesis, Concordia University.

abstract: Control function verification is an important task in current engineering design. Traditional researches usually focus on the final function validation when the control system has already been implemented on a hardware controller. However, it would be more useful if design errors are found in earlier stages of design. Logic diagram, as a popular middle medium, plays a critical role in the current design practices, especially for medium-sized and large-sized control systems. Therefore, verification of the design specifications of the logic diagrams is an interesting topic in order to find and eliminate the design errors in an early stage. In this thesis, we provide a viable approach to verify the design functions of the logic diagrams which is based on the modular supervisory control of Discrete-Event Systems. We create models for basic logic gates and introduce buffers to obtain automaton representation of logic diagrams After converting the informal verbal specifications to automata, we can verify whether the logic diagram satisfies these specifications with the help of TTCT (a computer program based on automata for analysis and design of supervisory control systems). A formal proof of controllability and a semi-formal proof of nonblocking property are given. An industrial-sized example is studied to demonstrate the feasibility of our methodology.


identifier: Zhao, Yan  (2008) Decentralized receding horizon control with application to multiple vehicle systems.  Masters thesis, Concordia University.

abstract: Receding horizon control (RHC) has been one of the most popular control approaches recently due to its capability to achieve optimal performance in the presence of saturation constraints. There have been numerous new research results for RHC (also referred to as model predictive control) in the process control community. However, due to the high computational cost, associated with the numerical optimization problem, RHC has not often been successfully implemented on multiple vehicle systems with fast dynamics.   Decentralized receding horizon control (DRHC) is a new promising approach to reduce the computational burden of RHC. It allows the division of the computation problem into smaller parts which are solved using a group of computational nodes. This results in a substantial reduction in the computational time required for RHC. This thesis involves modeling of wheeled and hovercraft vehicles including actuator dynamics. It then applies the DRHC approach to the vehicles and implements the DRHC systems in virtual reality simulations and an experimental setup. Together, these results establish a new and useful framework for applying RHC to multiple vehicle problems.


identifier: El-Omari, Samir  (2008) Automated data acquisition for tracking and control of construction projects.  PhD thesis, Concordia University.

abstract: Controlling construction projects necessitates controlling their time and cost in an effort to meet the planned targets. Management needs timely data that represent the status of the project to take corrective actions, if needed. The earned value technique is widely used for periodic monitoring of actual expenditures and physical scope accomplishment and, accordingly, for generating period-by-period progress reports. These reports are commonly developed by essentially comparing the collected actual data pertinent to work performed on site to that planned. The objectives of this research thesis are to study and analyze the characteristics of automated data acquisition technologies in an effort to automate the process of data collection from construction sites for progress measurement. This includes their capabilities and limitations and their respective suitability to track various construction operations. Experiments were conducted to study the applications of different automated data acquisition technologies and explore the most suitable IT platform for integrating them in one tracking and control system. Current automated data acquisition technologies are described, and their suitability for use in tracking and controlling construction activities is assessed. This includes bar coding, Radio Frequency Identification (RFID) 3D laser scanning, photogrammetry, multimedia, and pen-based computers. Each automated technology, is used for a certain construction task on site. For example, 3D scanner or LADAR (laser distance and ranging) was integrated in this thesis together with photogrammetry to rapidly track changes of quantities of work accomplished such as excavation works. Integrating these two technologies alleviates limitations associated with each of them individually such as the number of scans required and the time needed for each scan to produce acceptable results during the 3D modeling process. It also overcomes limitations associated with photogrammetry when modeling 3D images of objects with unclear geometrical properties as in the case of earthmoving operations where modeling 3D images from digital photo images becomes difficult and the presence of a scanned image can be helpful. Bar coding and RFID are utilized for material and labor tracking. In the reporting stage, more photo images would be more desirable. Pen-based or tablet computer is utilized as the main interface tool with the user. The user can move with a tablet PC in the construction site and record, take snapshots and also hand written comments about activities on site. A proposed cost/schedule control model is presented that Integrates different automated data acquisition technologies, a planning and scheduling software system, a relational database, and AutoCAD to generate progress reports that can assist project management teams in decision making.


identifier: Mao, Qian  (2008) Experimental determination of drying capacity of wood-frame envelope systems for comparative studies and limit state verification.  PhD thesis, Concordia University.

abstract: The building envelope protects the occupants against outdoor weather and contains the indoor environment to provide comfort for the occupants. As demonstrated through field observations and large-scale experimental tests, wind-driving rain can penetrate the building envelope through design defects or through defects which may develop during its lifetime operation. The rate at which the penetrated water can be evacuated, which is a function of the drying capacity of the envelope, can affect significantly the durability of building envelope systems. However, adequate methods for quantifying the relative drying capacity of building envelope systems do not exist. The objective of this research is to develop a methodology to evaluate the relative drying capacity of building envelope systems of different compositions and thereby to assist the performance evaluation and design of envelope systems.   An innovative experimental procedure has been introduced to apply uniform in-cavity moisture loading by placing a water tray at the bottom of the stud cavity to represent the penetrated water. After a preliminary test for verification and improvement, an experimental program was carried out to monitor the processes of water evaporation from the tray, moisture absorption by envelope materials and moisture evacuation from the envelope. Thirty-one full-size wall specimens of various configurations formed the enclosures of a two-story test hut, located in a large environmental chamber. Tests were carried out over five test periods in 283 days under steady-state "outdoor" conditions that were selected from 10% worst-drying months of Montreal based on 31-year weather data. Over 1,000 electronic sensors and 750 gravimetric samples were installed. By implementing the water tray, a quantitative relationship between in-cavity moisture loading and the moisture responses in the envelope systems was established experimentally for the first time for each wall specimen.  in a new window  ReferencesReferences (103)  Documents with shared references (1054)  More like this See similar documents      Search with indexing terms     Subject Civil engineering       Search       Experimental determination of drying capacity of wood-frame envelope systems for comparative studies and limit state verification  Mao, Qian. Concordia University (Canada), 2008. NR45672.    Turn on hit highlighting for speaking browsers        Abstract (summary)   Translate Abstract                            The building envelope protects the occupants against outdoor weather and contains the indoor environment to provide comfort for the occupants. As demonstrated through field observations and large-scale experimental tests, wind-driving rain can penetrate the building envelope through design defects or through defects which may develop during its lifetime operation. The rate at which the penetrated water can be evacuated, which is a function of the drying capacity of the envelope, can affect significantly the durability of building envelope systems. However, adequate methods for quantifying the relative drying capacity of building envelope systems do not exist. The objective of this research is to develop a methodology to evaluate the relative drying capacity of building envelope systems of different compositions and thereby to assist the performance evaluation and design of envelope systems.   An innovative experimental procedure has been introduced to apply uniform in-cavity moisture loading by placing a water tray at the bottom of the stud cavity to represent the penetrated water. After a preliminary test for verification and improvement, an experimental program was carried out to monitor the processes of water evaporation from the tray, moisture absorption by envelope materials and moisture evacuation from the envelope. Thirty-one full-size wall specimens of various configurations formed the enclosures of a two-story test hut, located in a large environmental chamber. Tests were carried out over five test periods in 283 days under steady-state "outdoor" conditions that were selected from 10% worst-drying months of Montreal based on 31-year weather data. Over 1,000 electronic sensors and 750 gravimetric samples were installed. By implementing the water tray, a quantitative relationship between in-cavity moisture loading and the moisture responses in the envelope systems was established experimentally for the first time for each wall specimen.   A drying capacity indicator has been developed to quantitatively characterize and compare the relative drying capacity of wood-framed building envelope systems. First, load-response profiles are developed by monitoring the evaporation from the water trays as the moisture source in the stud cavity and by monitoring the moisture absorbed in the gravimetric samples in the sheathings. Second, an allowable moisture limit of wood-framed envelopes is set at 20% MC by weight. Third the region from this 20% MC to the fiber saturation point (FSP), about 28% MC depending on wood species, is deemed as a safety margin against fungal decay. Fourth, the loading at which the 20% MC limit is reached in the moisture response of sheathing was determined from the load-response profiles and was defined as the In-Cavity Evaporation Allowance (ICEA). By comparing the ICEA values obtained from the experimental data for the 31 specimens, the drying performances of these wall configurations were characterized and compared; and ICEA has shown to be a good indicator for evaluating drying capacity of envelopes.   To demonstrate the potential of the newly proposed experimental method and the ICEA concept, a procedure is presented to verify quantitatively the acceptability of a wall configuration by matching potential moisture penetration of the wall against its drying capacity. This verification procedure adopts the concept of the LSD (limit state design) principle used in structural engineering. A case study applying this procedure to 12 testing wall assemblies is presented.   This thesis research on experimental and analytical investigation on the drying performance of building envelope systems has explored innovative concepts, validated them with quantitative testing procedures, advanced the current understanding and design of building envelope systems, and posed new challenges for future research.


identifier: Basyouni, Ayda  (2008) Resource management for cross layered star and mesh networks.  PhD thesis, Concordia University.

abstract: The use of wireless services is rapidly spreading around the world and many of the world population no longer know how to cope without their cell phones; the feel of always being connected offers a great sense of flexibility and security. So far, voice has been the primary wireless application. However, with the Internet continuing to influence our daily lives, the demand for wireless data is extensively increasing. Already, in the countries that have cellular-data services readily available, the number of cellular subscribers taking advantage of data services has reached significant proportions.   In this thesis, we investigate resource management techniques for cross layered star and mesh wireless data networks. In particular, we investigate several aspects related to resource management techniques over the reverse packet data channel in cdma2000 1xEV star networks. We provide an upper bound for the reverse packet data channel throughput as a function of the number of mobile stations that are allowed to transmit instantaneously on each time slot. We also provide a lower bound for the average sector throughput based on the number of users per sector and propose several autonomous rate assignment, and scheduling techniques that provide a significant throughput improvement relative to other published techniques.   We also develop analytical models for lowest-rate-first, highest-rate-first priority scheduling techniques, and two round-robin fair scheduling techniques over the reverse data channel in cdma2000 1xEV star networks. For these four scheduling techniques, the distribution of the mobile stations among the possible data rates is modelled as a Markov process. An analytical expression for the steady state system throughput is derived from the steady state distribution of the above Markov process. The above model is extended to evaluate the performance of the cross layered design between the hybrid ARQ, rate assignment, and time slot scheduling over the reverse packet data channel in cdma2000 1xEV. Expressions for the steady state system throughput and file transmission delay are derived from the steady state distribution of this model. Fountain codes are a class of erasure codes with the property that a potentially limitless sequence of encoding symbols can be recovered from any subset of size equal to or slightly larger than the number of source symbols. In this thesis we relate the parameters of the higher layer Fountain codes to those of the physical layer codes to present a cross layered coding technique. Based on the bit error rate of physical layer codes, the upper layer Fountain code's parameters are designed to obtain a prespecified performance. The performance of the proposed cross layered coding technique is found to be comparable to that of physical layer based Hybrid ARQ technique. As an application we studied the performance of WiMAX backhaul mesh networks where cashing is allowed at the service stations and proposed cross layered coding technique is used as its main coding scheme. In particular, the performance of the above network is modelled as a Markov process and analytical expressions for the steady state system performance are derived from its associated steady state distribution.   All the above analytical models are validated through simulations.


identifier: Zeng, Xiang Nian  (2008) Carrier frequency offset estimation for orthogonal frequency division multiplexing systems.  PhD thesis, Concordia University.

abstract: Orthogonal frequency division multiplexing (OFDM) is an attractive modulation scheme used in wideband communications because it essentially transforms the frequency selective channel into a flat fading channel. Furthermore, the combination of multiple-input multiple-output (MIMO) signal processing and OFDM seems to be an ideal solution for supporting reliable high data rate transmission for future wireless communication systems. However, despite the great advantages OFDM systems offer, such systems present challenges of their own. One of the most important challenges is carrier frequency offset (CFO) estimation, which is crucial in building reliable wireless communication systems.   In this thesis, we consider CFO estimation for the downlink and uplink OFDM systems. For the downlink channel, we focus on blind schemes where the cost functions are designed such that they exploit implicit properties associated with the transmitted signal where no training signal is required. By taking the unconditional maximum likelihood approach, we propose a virtual subcarrier based blind scheme for MIMO-OFDM systems in the presence of spatial correlation. We conclude that the presence of spatial correlation does not impact the CFO estimation significantly. We also propose a CFO estimator for OFDM systems with constant modulus signaling and extend it to MIMO-OFDM systems employing orthogonal space-time block coding. The curve fitting method is used which gives a closed-form expression for CFO estimation. Therefore, the proposed scheme provides an excellent trade-off between complexity and performance as compared to prominent existing estimation schemes. Furthermore, we design a blind CFO estimation scheme for differentially modulated OFDM systems based on the finite alphabet constraint. It can achieve better performance at high signal-to-noise ratios (SNRs) at the expense of some additional computational complexity as compared to the schemes based on the constant modulus constraint. The constrained Cramer-Rao lower bound (CRLB) is also derived for the blind estimation scheme. As for the uplink channel, which is a more challenging problem, we propose two training aided schemes. One is based on a scalar extended Kalman filter (EKF) and the other one is on the variable projection (VP) algorithm. For both schemes, we assume that the system uses an arbitrary subcarrier assignment scheme, which is more involved than the other two schemes, namely block and interleaved subcarrier assignment scheme.   In the first scheme, to apply the scalar EKF algorithm, we represent the measurement equation as a function of a scalar state, i.e., each user's CFO, in lieu of a state vector which consists of both CFO and channel coefficients by replacing the unknown channel coefficients with a nonlinear function of CFO. This proposed scheme can achieve the CRLB at high SNR for two users with a complexity lower than that of the alternating-projection method. In the second scheme, the VP algorithm is used for CFO estimation which is followed with a robust minimum mean square error (MMSE) estimator for channel estimation. In the VP algorithm, the nonlinear least square cost function is optimized numerically by updating the CFOs and channel coefficients separately at each iteration. We demonstrate that this proposed scheme is superior to the existing methods in terms of convergence speed, computational complexity and estimation performance.


identifier: Gollu, Narendra  (2008) Development of novel satellite attitude determination and control algorithms based on telemetry data from an Earth satellite.  PhD thesis, Concordia University.

abstract: All spacecraft missions require accurate knowledge of attitude, which is derived from on-board sensors using attitude determination algorithms. The increasing demands for attitude accuracy, high performance and low cost spacecraft are driving designers to change from available attitude determination methods to those that are more robust and accurate. However, the cost, the processor workload and the time-constraints in spacecraft development and deployment projects curtail the opportunity for developing new on-board attitude determination methods, especially with regards to the development of more precise sensors. Therefore, it is always desired to achieve the required attitude accuracy with the existing set of on-board sensors, but using effective attitude determination methods and sensor fusion algorithms. Developing such algorithms starts on the ground and is subject to verification and tuning with real experimental data from telemetry. Moreover, the on-ground mission control center has to evaluate the attitude accuracy, calibrate sensors and performance. Motivated by these needs, the main objective of this thesis is to develop novel attitude determination algorithms combining several sensors and attitude estimation methods for Ground-Based Attitude Estimation (GBAE) with telemetry data. The GBAE formulation will be based on a guaranteed ellipsoidal state estimation for acquisition mode and a modified Kalman filter for pointing mode, to provide optimal attitude estimates of the spacecraft. The GBAE has to be evaluated both in the simulation environment and in the flight environment. In the simulation environment, the evaluation of the GBAE rests on the availability of an accurate dynamical model for the spacecraft. However, spacecraft dynamics are complex with multiple modes of operation. Moreover, the nonlinearities in the actual system make the spacecraft dynamics more complex. This motivates the use of switching between a global nonlinear controller for acquisition mode and a local linear controller for pointing mode, which can guarantee performance and is less computationally intensive for implementation in an on-board microprocessor. In this thesis, novel attitude determination and control algorithms are evaluated in the flight environment for a case study in collaboration with the Canadian Space Agency for the SCISAT-1 satellite.


identifier: Yang, Fan  (2008) Optimal vibration suppression of beam-type structures using passive and semi-active tuned mass dampers.  PhD thesis, Concordia University.

abstract: The overall aim of this dissertation is to conduct a comprehensive investigation on the design optimization for passive and semi-active vibration suppression of beam-type structures utilizing the Tuned Mass Damper (TMD) and Semi-Active Mass Damper (SAMD) to prevent discomfort, damage or outright structural failure through dissipating the vibratory energy effectively.   The finite element model for general curved beams with variable curvatures under different assumptions (including/excluding the effects of the axial extensibility, shear deformation and rotary inertia) are developed and then utilized to solve the governing differential equations of motion for beam-type structures with the attached TMD system. The developed equations of motion in finite element form are then solved through the random vibration state-space analysis method to effectively find the variance of response under stationary random loading.   A hybrid optimization methodology, which combines the global optimization method based on Genetic Algorithm (GA) and the powerful local optimization method based on Sequential Quadratic Programming (SQP), is developed and then utilized to find the optimal design parameters (damping, stiffness and position) of the attached single and multiple TMD systems. Based on the extensive numerical investigation, a design framework for vibration suppression of beam-type structures using TMD technology is then presented.   An in-house experimental set-up is designed to demonstrate the effectiveness of the developed optimal design approach for vibration suppression of beam-type structures using TMD technology.   Next, the Magneto-Rheological (MR) fluid damper is utilized to design the SAMD system. A new hysteresis model based on the LuGre friction model is developed to analyze the dynamic behavior of large-scale MR-damper (MR-9000 type) accurately and efficiently. The gradient based optimization technique and least square estimation method have been utilized to identify the characteristic parameters of MR-damper. Moreover, based on the developed hysteresis model, an effective inverse MR-damper model has also been proposed, which can be readily used in the design of semi-active vibration suppression devices. The controller for SAMD system using MR-damper is designed based on the proposed inverse MR-damper model and H2 /LQG controller design methodology. The developed SAMD system along with the MR-damper model is then implemented to beam-type structures to suppress the vibration. It has been shown that the designed SAMD system using MR-damper can effectively suppress the vibration in a robust and fail-safe manner.


identifier: Hershorn, Kim  (2008) A love song for Evie Rose : an investigation of health, education, identity, and social change.  PhD thesis, Concordia University.

abstract: This creative investigation revolves around A Love Song for Evie Rose, a semi-autobiographic travel narrative of multiple quests that are part of the same journey: finding a route from pain and illness to wellness; the search for social justice and healthy approaches to social activism; the search for identity and a place to belong; the need to find meaning in the past as well as the future; and the tracing of possible paths to healing the world and the environment, as well as the individual. The investigation of the connection between learning and health is central to this inquiry which comprises a profound reflection on pedagogies of love in both formal and informal education. Excerpted from a longer novel, You Say You Want a Revolution (whose writing was part of the research methodology), the story spans two generations and moves back and forth between several countries and three continents, capturing the political zeitgeist and history of over three decades from the late sixties to the present. The story of a woman's chronic pain and search for healing is shown against a backdrop of popular culture (especially music) and political unrest that mirrors and often shapes her journey. A series of critical scholarly reflections punctuates, accents, and analyses the series of snapshots and soundbytes that form the narrative, highlighting the intersection and the relationships between personal, social, and political change. The narrative and the accompanying reflections raise and re-frame current theoretical questions about health, education, individual and social change, and identities.


identifier: Kakkar, Mariam  (2008) A synthesis of good design practices for stand alone "Global e-learning" for global organisations.  PhD thesis, Concordia University.

abstract: Global organizations spend millions of dollars designing stand alone Global e-learning. The shortage of research in stand alone Global e-learning and a consequent lack of empirically validated guidelines presents a challenge for global organizations in their efforts to design and deliver e-learning courses that are suitable for a diverse range of learners (World Bank, 1999). Guidelines proposed by Henderson (1996), Edmundson (1996), and Gunawardena and Sanchez (1996) are often used in the design of global courses. However, it is difficult to find under what conditions a particular guideline or educational strategy is effective. This study aims to reduce this lacuna in the knowledge about the design of stand alone e-learning courses. The current work is an exploratory study of four Global e-learning courses. Using Reeve's (1997) e-learning dimensions, the study focused on exploring Global e-learning from the learner's point of view. This analysis of e-learning design is important because it can identify the important considerations as perceived by the learner. Personalizing the learning content, opportunities for learner interaction, flexible design, and the use of multiple epistemologies emerged as important design considerations. Using recommendations from learners, a set of ten design guidelines emerged. In the strategic planning process these guidelines can provide useful tools for evaluating existing Global e-learning initiatives or determining critical success for future Global e-learning initiatives. The discussion focuses on essential elements to be considered for the development of stand alone Global e-learning in global organizations.


identifier: Zhang, Xuezhi  (2008) Numerical study of Louver cooling scheme on gas turbine airfoils.  PhD thesis, Concordia University.

abstract: This work presents the performance of a louver film-cooling scheme under different operating conditions. The louver cooling scheme consists of a bend by which the coolant going through the flow passage is redirected from vertical to horizontal direction before being injected into the mainstream through an expanded exit. Not only is the momentum of the coolant converted to the mainstream direction, but it is also reduced by the expanded exit before injection. The impingement of the coolant on the blade surface inside the bend also enables further cooling on the targeted surface. The louver cooling scheme was tested under a variety of conditions, from a flat plate to airfoils, from low speed incompressible flows to transonic flows, from a stationary airfoil to a rotating airfoil, and from the leading edge to the middle of an airfoil. Unsteady analysis using a DES (Detached Eddy Simulation) model was also carried out to evaluate its ability to accurately simulate film cooling by comparing with steady state analysis.   In general, the louver cooling scheme has been proved to provide enhanced cooling protection to the targeted surface in comparison with other cooling schemes in all conditions tested. At low speed incompressible flow conditions, a higher blowing ratio led to a higher cooling effectiveness. At transonic flow conditions, a moderately higher blowing ratio also proved helpful with a higher cooling effectiveness. Very high blowing ratios, however, proved to be detrimental to the cooling performance since strong detached shock wave structures due to high blowing ratios caused boundary layer separation, rendering the coolant virtually ineffective. The rotation of blade was found to have a significant impact on the level of cooling effectiveness at the leading edge of an airfoil. With regard to the cooling performance, blowing ratio was the dominant factor at low rotational speeds and the rotational speed was the dominant factor at high blowing ratios for circular holes. For the louver scheme as jet liftoff was avoided, effectiveness increased with rotating speed. Results also showed that, unsteady analysis was not significantly more accurate than steady analysis. The unsteady analysis did capture the coolant lateral spreading better, with a high cost of computing, however.  Results in this work show that shock waves encountered on transonic airfoils had a significant impact on film cooling effectiveness on any shaped holes. Therefore, experimental data obtained under low speed test should be used with great caution in real design of turbine blade cooling. There are fundamental differences in film cooling between at the leading edge and elsewhere on an airfoil in that a slight incidence shifting due to turbine rotating speed may cause a sudden decrease in cooling effectiveness level at high blowing ratios for circular hole. This could lead to a catastrophic failure if the blade is already in a weak and stressed state. Using of shaped holes with expanded exits may prevent this from happening.