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Full-Text Articles in Engineering
Development And Characterization Of A High-Resolution Microspect System For Small-Animal Imaging, Yujin Qi, Benjamin Tsui, Yuchuan Wang, Brian Yoder, R Wojcik, S Majewski, A G Weisenberger
Development And Characterization Of A High-Resolution Microspect System For Small-Animal Imaging, Yujin Qi, Benjamin Tsui, Yuchuan Wang, Brian Yoder, R Wojcik, S Majewski, A G Weisenberger
Faculty of Engineering and Information Sciences - Papers: Part A
We developed a high-resolution microSPECT system and investigated its performance characteristics for small animal imaging. The microSPECT system consists of a stationary compact gamma camera with interchangeable pinhole and parallel-hole collimators and vertical object rotation mechanism. The modular camera is based on a pixellated NaI(Tl) crystal array with 1.2 mm pixel size and 1.4 mm pixel pitch coupled to a 5” diameter Hamamatsu R3292 PSPMT. The pinhole collimator has a 10cm focal length fitted with keel-edge pinhole apertures with diameters of 1.0, 1.5 and 2.0 mm. The system performance was characterized by the measurements of the point source response function …
High-Temperature Creep-Deformation Behavior Of The Ni-Based Superalloy M963, Hongtao Zhu, Cheng Lu, A K. Tieu, Lizi He, Q. Zheng, X. F. Sun, Z. Q. Hu, H. R. Guan
High-Temperature Creep-Deformation Behavior Of The Ni-Based Superalloy M963, Hongtao Zhu, Cheng Lu, A K. Tieu, Lizi He, Q. Zheng, X. F. Sun, Z. Q. Hu, H. R. Guan
Faculty of Engineering - Papers (Archive)
The high-temperature creep-deformation behavior of a Ni-based M963 superalloy has been investigated over a broad stress range of 80 to 600 MPa at high temperatures (800 °C to 975 °C). The detailed dislocation configurations at different creep stages are examined through transmission electron microscopy (TEM). The results show that the deformation mechanism is stress and temperature dependent and mainly consists of three dislocation-controlling mechanisms: stacking faults and dislocation-pair shearing, dislocation bowing and Orowan looping, and dislocation climb.
Zeeman Spectra Of Boron In Germanium At High Magnetic Fields, R.E.M. Vickers, R. A. Lewis, P. Fisher, Y-J. Wang
Zeeman Spectra Of Boron In Germanium At High Magnetic Fields, R.E.M. Vickers, R. A. Lewis, P. Fisher, Y-J. Wang
Faculty of Engineering - Papers (Archive)
No abstract provided.
Composite Steel-Concrete Beams And Columns Fabricated With High Strength Steel (Hss) Plate, Brian Uy
Composite Steel-Concrete Beams And Columns Fabricated With High Strength Steel (Hss) Plate, Brian Uy
Faculty of Engineering - Papers (Archive)
High strength quenched and tempered structural steel has seen widespread implementation in heavily loaded columns in multistorey building construction. However, many current international codes do not cater for the use o f high strength steel and thus much needed research is required to give structural engineers the confidence to use this new and innovative material in a safe and efficient manner in construction. Herein, experiments and analytical studies on composite steel-concrete composite beams and recommendations for modified . design procedures will be summarised. This paper will also provide a comprehensive summary of experimental results on the uses of high strength …
In Pursuit Of High-Force/High-Stroke Conducting Polymer Actuators, Geoffrey M. Spinks, Binbin Xi, Toni E. Campbell, Philip G. Whitten, Vahid Mottaghitalab, Mehrdad Bahrami Samani, G G. Wallace
In Pursuit Of High-Force/High-Stroke Conducting Polymer Actuators, Geoffrey M. Spinks, Binbin Xi, Toni E. Campbell, Philip G. Whitten, Vahid Mottaghitalab, Mehrdad Bahrami Samani, G G. Wallace
Faculty of Engineering - Papers (Archive)
Conducting polymer actuators are being investigated for a number of applications. Both linear contracting/expanding and bending type actuators can be constructed that utilise the redox-induced volume changes in the conducting polymer. Improved actuator performance has been demonstrated by modifications to our helix-tube design. The pitch of the helix and bundling the actuators have increased the strain and force generated. Short-term improvements to the strain were also generated using new dopants, but cycle life was poor in this case. Further studies on the mechanism of actuation have continued to focus attention on the influence of the elastic modulus on the actuation …