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Full-Text Articles in Science and Technology Studies
Inclusion Of Mobile Telephone Numbers Into An Ongoing Population Health Survey In New South Wales, Australia, Using An Overlapping Dual-Frame Design: Impact On The Time Series, Margo Barr, Raymond A. Ferguson, David G. Steel
Inclusion Of Mobile Telephone Numbers Into An Ongoing Population Health Survey In New South Wales, Australia, Using An Overlapping Dual-Frame Design: Impact On The Time Series, Margo Barr, Raymond A. Ferguson, David G. Steel
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Performance Based Seismic Assessment Of Bridges Designed According To Canadian Highway Bridge Design Code, M Neaz Sheikh, Frederic Legeron
Performance Based Seismic Assessment Of Bridges Designed According To Canadian Highway Bridge Design Code, M Neaz Sheikh, Frederic Legeron
Faculty of Engineering and Information Sciences - Papers: Part A
Recent research efforts have focused on the development of performance based seismic design methodologies for structures. However, the seismic design rules prescribed in the current Canadian Highway Bridge Design Code (CHBDC) is based largely on force based design principles. Although a set of performance requirements (performance objectives) for different return period earthquake events have been specified, there is no explicit requirement in the CHBDC to check the attainment of such performance objectives for the designed bridges. Also, no engineering parameters have been assigned to the specified performance objectives. This paper correlates seismic performance objectives (both qualitative and quantitative) with engineering …
Optimal Design Of Vertical Ground Heat Exchangers By Using Entropy Generation Minimization Method And Genetic Algorithms, Su Huang, Zhenjun Ma, Paul Cooper
Optimal Design Of Vertical Ground Heat Exchangers By Using Entropy Generation Minimization Method And Genetic Algorithms, Su Huang, Zhenjun Ma, Paul Cooper
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the development and validation of an optimal design methodology for vertical U-tube ground heat exchangers (GHEs) used in HVAC systems. The dimensionless entropy generation number obtained by scaling the entropy generation due to heat transfer and pressure drop, on the ratio of the heat transfer rate to the average fluid temperature of vertical GHEs is employed as the objective function. Five design variables are first selected based on the global sensitivity analysis and then optimized by a genetic algorithm optimization technique. The entropy generation process combines the heat transfer and fluid mechanics with thermodynamic analysis. A case …
Global Intermodal Liner Shipping Network Design, Zhiyuan Liu, Qiang Meng, Shuaian Wang, Zhuo Sun
Global Intermodal Liner Shipping Network Design, Zhiyuan Liu, Qiang Meng, Shuaian Wang, Zhuo Sun
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a holistic analysis for the network design problem of the intermodal liner shipping system. Existing methods for liner shipping network design mainly deal with port-to-port demand. However, most of the demand has inland origins and/or destinations. Thus, it is necessary to cope with inland origin-destination (OD) pairs involving a change in transport mode from inland transportation to maritime shipping. A method is first proposed to convert inland OD demand to port-to-port demand. Then, a framework for global intermodal liner shipping network design is proposed. Finally, the proposed methodology is applied to and numerically verified by a large-scale …
Small Field In-Air Output Factors: The Role Of Miniphantom Design And Dosimeter Type, Kirbie Warrener, Benjamin Hug, Paul Liu, Anna Ralston, Martin A. Ebert, David Mckenzie, Natalka Suchowerska
Small Field In-Air Output Factors: The Role Of Miniphantom Design And Dosimeter Type, Kirbie Warrener, Benjamin Hug, Paul Liu, Anna Ralston, Martin A. Ebert, David Mckenzie, Natalka Suchowerska
Faculty of Engineering and Information Sciences - Papers: Part A
The commissioning of treatment planning systems and beam modeling requires measured input parameters. The measurement of relative output in-air, Sc is particularly difficult for small fields. The purpose of this study was to investigate the influence of miniphantom design and detector selection on measured Sc values for small fields and to validate the measurements against Monte Carlo simulations. Measurements were performed using brass caps (with sidewalls) or tops (no sidewalls) of varying heights and widths. The performance of two unshielded diodes (60012 and SFD), EBT2 radiochromic film, and a fiber optic dosimeter (FOD) were compared for fields defined by MLCs …
Design And Development Of A Novel Displacement Differential Self-Induced Magnetorheological Damper, Guoliang Hu, Yi Ru, Weihua Li
Design And Development Of A Novel Displacement Differential Self-Induced Magnetorheological Damper, Guoliang Hu, Yi Ru, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
This article presents the development of a novel magnetorheological damper which has a self-sensing ability. In this study, a linear variable differential sensor, which was based on the electromagnetic induction mechanism, was integrated with a conventional magnetorheological damper. The working principle, configuration, and prototype of the displacement differential self-induced magnetorheological damper based on the integrated linear variable differential sensor technology were presented. A mathematical model of the proposed displacement differential self-induced magnetorheological damper was established. The finite element model was built with two-dimensional Maxwell software and the magnetic simulations were presented. With this approach, the influence of the flux leakage, …
Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Racks, Benoit Gilbert, Lip H. Teh, Romain X. Badet, Kim Rasmussen
Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Racks, Benoit Gilbert, Lip H. Teh, Romain X. Badet, Kim Rasmussen
Faculty of Engineering and Information Sciences - Papers: Part A
This paper analyses the influence of horizontal bracing restraints provided by the friction between pallet bases and rail beams on the static behaviour and design of steel drive-in storage racks. The pallet bracing restraints are shown to significantly influence the structural behaviour of the rack, and their effect on the bending moment distribution of the uprights is studied in the paper. The 2D single upright model proposed by Godley is improved in this study by including the restraints provided by the plan flexural stiffness of the rail beams and the friction between the pallets and rail beams. The improved 2D …
Geometric Design Optimization For Dynamic Response Problem Of Continuous Reinforced Concrete Beams, Pezhman Sharafi, Muhammad Hadi, Lip H. Teh
Geometric Design Optimization For Dynamic Response Problem Of Continuous Reinforced Concrete Beams, Pezhman Sharafi, Muhammad Hadi, Lip H. Teh
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a computer-aided design method for conceptual geometric layout optimization of multispan RC beams for any type of dynamic responses. A key feature of the paper is the development of a new cost-optimization method for geometric layout problems that take both cost parameters and dynamic responses into account to achieve an optimum design along with acceptable dynamic performance of RC beams. This method takes advantage of employing a new optimization formulation that considerably simplifies the preliminary layout design computations. It focuses on minimizing the structural cost subject to constraints on eigenfrequencies, modal shapes, and the static and dynamic …
Optimal Design Of Semi Active Control For Adjacent Buildings Connected By Mr Damper Based On Integrated Fuzzy Logic And Multi-Objective Genetic Algorithm, Mehmet Uz, Muhammad N. S Hadi
Optimal Design Of Semi Active Control For Adjacent Buildings Connected By Mr Damper Based On Integrated Fuzzy Logic And Multi-Objective Genetic Algorithm, Mehmet Uz, Muhammad N. S Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
An optimal design strategy based on genetic algorithms (GA) is proposed for nonlinear hysteretic control devices that prevent pounding damage and achieve the best results in seismic response mitigation of two adjacent structures. An integrated fuzzy controller is used in order to provide the interactive relationships between damper forces and input voltages for MR dampers based on the modified Bouc-Wen model. Furthermore, Linear Quadratic Regulator (LQR) and H2/LQG (Linear Quadratic Gaussian) controllers based on clipped voltage law (CVL) are also used to compare the results obtained by fuzzy controller. This study employs the main objectives of the optimal design that …
Liner Ship Route Schedule Design With Port Time Windows, Shuaian Wang, Abdurahim Alharbi, Pamela Davy
Liner Ship Route Schedule Design With Port Time Windows, Shuaian Wang, Abdurahim Alharbi, Pamela Davy
Faculty of Engineering and Information Sciences - Papers: Part A
This paper examines a practical tactical liner ship route schedule design problem, which is the determination of the arrival and departure time at each port of call on the ship route. When designing the schedule, the availability of each port in a week, i.e., port time window, is incorporated. As a result, the designed schedule can be applied in practice without or with only minimum revisions. This problem is formulated as a mixed-integer nonlinear nonconvex optimization model. In view of the problem structure, an efficient holistic solution approach is proposed to obtain global optimal solution. The proposed solution method is …