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Joints play an important role in the application of YBaCuO-coated conductors. Given the limited length and various requirements of tapes, large numbers of joints are needed in some applications. Therefore, developing stable joints between tapes and achieving low joint resistance has become an important issue for the application of YBCO tapes. In this paper, we propose a novel superconducting joint...
The University of Glasgow-University of Electronic Science and Technology of China joint education programme enrolled its first cohort of students in Fall 2013. Continual assessment of the programme was initiated shortly thereafter to monitor student achievement in the programme, to evaluate how well the aims of the programme are being met, and to determine areas where improvements can be made. Several...
Four different solder alloys of Sn-3.5Ag-0.7Cu-xSb (x=0, 0.5, 1.0, and 2.0) were used to investigate the microstructure evolution, grain size distribution of intermetallic compound (IMC), and the relationship between copper atomic diffusion and channel width under different reflow time (t = 48, 240, 3600, and 7200s). Flux-driven ripening (FDR) theoretical model is adopted to analyze the grain ripening...
This paper presents the mechanical design of a social robot, Nancy, developed by Social Robotics Laboratory, Interactive and Digital Media Institute, National University of Singapore. The objective of our project is to introduce the social robot which is capable to interact with people, especially the elderly, based on fundamental, functional and social tasks. We developed Nancy with multi-module...
A thorough analysis of the electromagnetic compatibility of power lines and neighboring railway is presented. The railway is located close to the transmission line that consists of a combination of overhead and underground conductors and cables. Electromagnetic interference caused by high voltage power lines can endanger the proper operation of the signal and protection systems of the railways and...
This paper presents a new sensorless vector control method for induction motor drive at very low speed based on signal injection. In the proposed method, a low frequency signal is injected to stator currents and the corresponding angle error is detected to estimate the rotor position and speed. This method is independent of load variation, structures and the non-ideal features of the induction motor,...
This paper proposes a direct metal patterning method on three-dimensional structures with vertical side walls. It uses a 3-D multi-height silicon shadow mask made by double-side Deep Reactive Ion Etching (DRIE). Aluminum has been successfully patterned on the top, bottom and vertical side walls of 280mum wide trench with a depth of 250mum by sequentially tilting the wafer at three different angles...
This paper presents the design and testing of Abigaille-I, a spider-inspired robot. The system is miniaturized and has six legs and 18 actively controlled joints. Macro-, micro- and nano-structural design of the robot legs and feet are presented and preliminary experimental results are discussed. The long-term objective of this research is to develop an autonomous and miniaturized robotic system capable...
The size of sensors and electronics needed to measure absolute joint rotation imposes constrains on the miniaturization of multi-DOF robotic systems such as robotic fingers and miniaturized insect-inspired robots. The possibility to use optical fibers embedded on a robotic system and measure the bend loss to detect rotation is assessed in order to develop a future miniaturized sensor. Motivation of...
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