Schulich School of Engineering Research & Publications
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Browsing Schulich School of Engineering Research & Publications by Department "Civil Engineering"
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- ItemOpen AccessThe ABCs of online course syllabi: Anticipate, build on objectives, and collaborate.(Magna Publications, 2006-05) Jugdev, Kam; Hutchison, Maureen; Lynes, Shelley
- ItemOpen AccessBook review: Implementing virtual teams: Guide to organizational and human factors by A Edwards and J R Wilson(Pergamon, 2004) Jugdev, Kam
- ItemOpen AccessDistance education MBA students: An investigation into the use of an orientation course to address academic and social integration issues.(Routledge, 2006-06) Kanuka, Heather; Jugdev, KamDistance education programs warrant the use of innovative intervention practices to enhance student learning experiences. Academic and social empathy by faculty has been shown to enhance student retention in programs along with their critical thinking abilities. Using Holmberg’s (2001) theory of teaching-learning conversations as the guiding theoretical framework, the purpose of this study was to assess whether an intervention activity (a week-long orientation course) increases academic and social empathy for students entering a distance-delivered MBA programme. Empathy was measured through seven academic and social integration indicators. Using pre and post surveys (n=102), the results reveal that an orientation intervention can be effective for facilitating social and academic empathy.
- ItemOpen AccessDon't park your brain outside: A practical guide to improving shareholder value with SMART project management . Book review(Project Management Institute, 2000-12) Jugdev, Kam
- ItemOpen AccessEffects of Seasonal Ice Coverage on the Physical Oceanographic Conditions of the Kitikmeot Sea in the Canadian Arctic Archipelago(Taylor and Francis, 2021-08-31) Xu, Chengzhu; Mikhael, Wahad; Myers, Paul G.; Else, Brent; Sims, Richard P.; Zhou, QiThe Kitikmeot Sea is a semi-enclosed, east–west waterway in the southern Canadian Arctic Archipelago (CAA). In the present work, the ice conditions, stratification, and circulation of the Kitikmeot Sea are diagnosed using numerical simulations with a 1/12° resolution. The physical oceanographic conditions of the Kitikmeot Sea are different from channels in the northern CAA due to the existence of a substantial ice-free period each year. The consequences of such ice conditions are twofold. First, through fluctuations of external forcings, such as solar radiation and wind stress, acting directly or indirectly on the sea surface, the seasonal ice coverage leads to significant seasonal variations in both stratification and circulation. Our simulation results suggest that such variations include freshening and deepening of the surface layer, in which salinity can reach as low as 15 during the peak runoff season, and significantly stronger along-shore currents driven directly by the wind stress during the ice-free season. The second consequence is that the sea ice is not landfast but can move freely during the melting season. By analyzing the relative importance of thermodynamic (freezing and/or melting) and dynamic (ice movement) processes to the ice dynamics, our simulation results suggest that there is a net inflow of sea ice into the Kitikmeot Sea, which melts locally each summer. The movement of sea ice thus provides a significant freshwater pathway, which contributes approximately 14 km3 yr−1 of fresh water to the Kitikmeot Sea, on average, equivalent to a third of freshwater input from runoff from the land.
- ItemOpen AccessEffects of volume fraction and particle shape on the rheological properties of oblate spheroid suspensions(AIP Publishing, 2021-08-06) Guo, Junwei; Zhou, Qi; Wong, Ron Chik-KwongCoupled lattice Boltzmann and discrete element methods were employed to investigate the rheological properties of oblate spheroid suspensions in a Newtonian fluid. The volume fraction of the particles is varied along with the particle aspect ratio. As the particle shape is varied from sphere to oblate, we observe an increase in the relative viscosity as well as an increase in the particle contacts and the contact distance. The more oblate particles in denser suspensions are observed to reorient systematically subject to the shear flow. We recast the viscosity data using the Krieger–Dougherty formula and report the modified Einstein coefficients.
- ItemOpen AccessEvolution of Rayleigh-Taylor instability at the interface between a granular suspension and a clear fluid(American Institute of Physics, 2022-06-19) Guo, Junwei; Zhou, Qi; Wong, Ron C.-K.We report the characteristics of Rayleigh-Taylor instabilities (RTI) occurring at the interface between a suspension of granular particles and a clear fluid. The time evolution of these instabilities is studied numerically using coupled lattice Boltzmann and discrete element methods with a focus on the overall growth rate (σ) of the instabilities and their average wave number (k). Special attention is paid to the effects of two parameters, the solid fraction (0.10{less than or equal to}φ{less than or equal to}0.40) of the granular suspension and the solid-to-fluid density ratio (1.5{less than or equal to}R{less than or equal to}2.7). Perturbations at the interface are observed to undergo a period of linear growth, the duration of which decreases with φ and scales with the particle shear time d/w∞, where d is the particle diameter and w∞ is the terminal velocity. For φ>0.10, the transition from linear to nonlinear growth occurs when the characteristic steepness of the perturbations is around 29%. At this transition, the average wave number is approximately 0.67d-1 for φ>0.10 and appears independent of R. For a given φ, the growth rate is found to be inversely proportional to the particle shear time, i.e., σ ∝(d/w∞)-1; at a given R, σ increases monotonically with φ, largely consistent with a linear stability analysis (LSA) in which the granular suspension is approximated as a continuum. These results reveal the relevance of the time scale d/w∞ to the evolution of interfacial granular RTI, highlight the various effects of φ and R on these instabilities, and demonstrate modest applicability of the continuum-based LSA for the particle-laden problem.
- ItemOpen AccessA Factor Analysis of Tangible and Intangible Project Management Assets(Project Management Institute, 2006-07) Jugdev, Kam; Mathur, Gita
- ItemOpen AccessLarge-scale characteristics of stratified wake turbulence at varying Reynolds number(2019-08-09) Zhou, Qi; Diamessis, Peter J.We analyze a large-eddy simulation data set of wakes of a towed sphere of diameter D at speed U in a uniformly stratified Boussinesq fluid with buoyancy frequency N and kinematic viscosity ν. These temporally evolving wakes are simulated using a spectral multidomain penalty-method-based incompressible Navier-Stokes solver for Fr≡2U/ND∈{4,16,64} and Re≡UD/ν∈{5×103,105,4×105, enabling a systematic examination of stratified wakes at three different values of Re sufficiently separated in magnitude. As such, particular attention is paid to the effects of varying Re on the evolution of large-scale characteristics of stratified wake turbulence. We examine the evolution of horizontal and vertical integral length scales (ℓh and ℓv), horizontal and vertical fluctuation velocities (U and W), local vertical shear, as well as the resulting dimensionless parameters based on the above quantities. In particular, the vertical turbulent Froude number Fr★v≡2πU/Nℓv is found to be of order unity, a signature of the dynamics in the strongly stratified regime where shear instabilities develop between anisotropic flow layers. The horizontal turbulent Reynolds number Reh≡Uℓh/ν stays approximately constant in time and the horizontal turbulent Froude number Frh≡U/Nℓh decays in time as (Nt)−1, consistent with scaling analysis of freely decaying turbulence. We characterize the transitions between distinct stratified flow regimes and examine the effects of body-based parameters Re and Fr on these transitions. The transition from the weakly to the strongly stratified regime, which is marked by Fr★v decaying to unity, occurs when Frh≃O(0.01). We further show that the initial value of Reh at which the flow completes the above transition scales as ReFr−2/3, which provides a way to predict the possibility of accessing the strongly stratified regime for a wake of given Re and Fr. The analysis reported here constitutes an attempt to obtain the predictive capability of stratified wake turbulence in terms of Reynolds number Re, applying select elements of strongly stratified turbulence theory, so far typically utilized for homogeneous turbulence, to a canonical inhomogeneous turbulent free-shear flow.
- ItemOpen AccessNumerical investigation of particle cloud sedimentation in power-law shear-thinning fluids for moderate Reynolds number(Elsevier, 2021-09-03) Guo, Junwei; Zhou, Qi; Wong, Ron Chik-KwongA series of numerical simulations are performed for the sedimentation process of a particle cloud in shear-thinning fluids using lattice Boltzmann and discrete element methods. The initial particle concentration, , and the power-law index of the fluid, n, and Reynolds number, , are varied in these simulations. For , the particle cloud size grows in the longitudinal direction as the cloud settles, leading to reduced particle concentration and a quasi-steady settling velocity, . The velocity ratio, , where is the corresponding single-particle terminal velocity, is found to decrease with both n and . This velocity ratio is only weakly dependent on the initial concentration () due to particle dispersion. For , the cloud loses its initial shape and disintegrates while settling, with particles escaping from the cloud due to differential particle settling velocities.
- ItemOpen AccessOnline Executive MBA Orientation(The Sloan Consorium, 2006-03) Jugdev, Kam; Hutchison, Maureen
- ItemOpen AccessOnline MBA Orientation Program: Some best practices(Magna Publications, 2004-11) Jugdev, Kam; Hutchison, Maureen
- ItemOpen AccessPlanning Delivery-by-Drone Micro-Fulfilment Centres(2022-07-25) Lamb, JacobDelivery drones are a disruptive technology that is spurring logistics system change, such as the adoption of urban micro-fulfilment centres (MFCs). In this paper, we develop and implement a two-stage continuum approximation (CA) model of this disruptive system in a geographic information system (GIS). The model includes common CA techniques at a local level to minimise cost, and then these local solutions are used in a second stage regional location-allocation multiple knapsack problem. We then compare the drone MFC system to a traditional delivery-by-truck system and investigate potential cost or emissions savings by adjusting time-window demand, logistical sprawl, electric truck alternatives, and MFC emissions. Furthermore, we conduct a sensitivity analysis to show that uncertainty in demand and effective storage density both significantly influence the number of MFCs selected and benchmark our model against commercial solvers. This methodology may also be further developed and applied to other new delivery vehicle modes.
- ItemOpen AccessProject lessons learned: Implications for an empirical study in the Canadian energy sector(First International Construction Specialty Conference (ICSC-1), 2006-05) Jugdev, Kam
- ItemOpen AccessProject Management : A strategic asset?(American Management Association, 2006) Jugdev, Kam
- ItemOpen AccessProject Management as a Strategic Asset: What does it look like and how do companies get there?(Project Management Institute, 2005) Jugdev, Kam
- ItemOpen AccessProject management elements as strategic assets: Preliminary findings(Emerald Group Publishing Ltd., 2006-11) Jugdev, Kam
- ItemOpen AccessProject management maturity models: The silver bullets of competitive advantage.(Project Management Institute, 2002-12) Jugdev, Kam; Thomas, JProject management maturity models are important assessment tools for the profession. Maturity models identify organizational strengths and weaknesses as well as provide benchmarking information. They capture explicit, codified practice (know-what), but do not include the intangible assets of project management (know-how). Some have made the claim that project management maturity models (MM) can lead to a competitive advantage for firms. This paper uses four resource-based frameworks to assess whether or not maturity models lead to a sustained competitive advantage. In the context of the strategy domain, it is concluded that MMs can result in a temporary competitive advantage but not a sustained competitive advantage. Clearly, a sustained competitive advantage is rooted in a combination of know-what and know-how.
- ItemOpen AccessReduced-order representation of stratified wakes by proper orthogonal decomposition utilizing translational symmetry(Springer, 2021-02-11) Halawa, Basem; Xu, Chengzhu; Zhou, QiVisualizations of reduced-order representations of stratified wakes of Reynolds number Re∈{5,25,100}×103 are presented at a fixed internal Froude number. The reduced-order representations are constructed by applying proper orthogonal decomposition (POD) to numerical datasets that are high-resolution, three-dimensional and time-dependent. Due to the transient nature of the flow, the dynamics to be represented are highly non-stationary, posing a challenge for the effectiveness of POD. The translational symmetry inherent in the computational configuration is utilized for the POD analysis. This technique turns out to be effective in terms of improving the convergence of energy content represented by the POD modes and enhancing the interpretability of the temporal dynamics. Individual POD modes representing distinct dynamics of various scales are visualized. In the turbulent region, visualizations of the reconstructed vertical vorticity fields suggest that the dominant length scale of flow structures decreases with the modal index. For internal wave motions, visualizations of the reconstructed vertical velocity fields show the opposite trend, as the wavelength of internal waves observed in the wake’s ambient increases with the modal index. The temporal coefficients for a given mode are observed to vary minimally between Re=2.5×104 and 105, suggesting a potential asymptote of the large-scale temporal dynamics in terms of Reynolds number.
- ItemOpen AccessResearch issues: A conceptual look at project management as a source of competitive advantage.(Administrative Sciences Association of Canada, 2004-06) Jugdev, Kam