Non-Contact, High Resolution Microwave Sensing in Air, Liquid or Solid

Description

Microwave resonance technology is used for various sensing applications in areas such as material identification and classification, environmental system and food industry monitoring, and biomedical diagnostics. Conventionally, this technology has suffered from low sensitivity and resolution. Quality factor plays a critical role in determining sensitivity, resolution, and minimum detectable signal of the sensor. A microwave resonance device with a high quality factor can lead to […]

Non-Repeating Interval Sequences for Coded Imaging and Multi-User Communications

Description
Coded excitation is widely used in ultrasound, radar, sonar and other imaging systems as well as in communication systems. Coded excitation involves the transmission of long-duration pulses with a time-bandwidth product (TBP) greater than 1. By coding the pulse on transmission, the received signals may be processed to compress (decode) the effective impulse response, and […]

Light-Emitting Diode Compatible with Silicon Microelectronics

Description
The drive for more components (per unit area) on a microelectronics chip necessitates more interconnects between them. As the feature size of these interconnects shrinks and the interconnects are packed in more tightly, problems such as RC time delay, heating or power dissipation, and electromagnetic interference (crosstalk) become more prevalent. One possibility to overcome this […]

Polymer-Based Muscles and Actuators

Description
Materials that spontaneously undergo a change in structure, for example, from a two dimensional (2D) to three dimensional (3D) structure in response to external stimuli have been of great interest as artificial muscles, and for fabricating novel actuators, switches, valves and in robotics. Hydrogels are of particular interest owing to their mechanical properties, chemical diversity, […]

Gecko Inspired Adhesive Microfluidic Channels

Description
Many adhesives require a liquid component, are one time use, or leave a residue upon removal.  These issues reduce the versatility of microfluidic channels and the breadth of their applications.

 

Researchers at the University of Alberta have developed an improved micro-electromechanical manufacturing technique that can more efficiently and cost effectively create a novel dry adhesive that […]

Hyperspectral Imaging for Ore Froth Processing

Description
Closed loop assessment of mineral froth is typically not possible using conventional ore processing technology, because the assessment of product quality and prediction of product recovery require laboratory analysis. However, researchers at the University of Alberta have developed a novel technique for assessing ore froth quality in closed-loop mineral flotation systems using features of the […]

Cost Effective MEMS Manufacturing Method for Gecko Inspired Dry Adhesives

Description
Many adhesives require a liquid component, are one time use, or leave a residue upon removal.  Molecular scale Van der Waals forces that result between smooth surfaces in very close contact can be utilized to overcome many of these issues.

 

Researchers at the University of Alberta have developed an improved micro-electromechanical manufacturing technique that can more […]

Improved Microwave Susceptor Design for Rapid and Controllable Heating

Description
Wafer bonding is widely used for packaging micro-fabricated devices such as microfluidic channels, microelectromechanical sensors (MEMS) and optical micro mirrors to ensure a mechanically stable and hermetically sealed encapsulation. This procedure involves heating the wafer, a thin slice of semiconductor material, up to its melting point and then cooling to surround the device. Unfortunately, the […]

Metallic Nanocomposite Films for NEMS Applications

Description
Most structural components in nanoelectromechanical systems (NEMS) are synthesized from single crystal or polycrystalline silicon, carbide, nitride, or diamond films, with silicon being by far the most widely used. However, silicon has low fracture strength and poor wear characteristics and is poorly suited for electrically conductive and magnetic sensing applications. Metallic films can provide better […]

A New Experimental Technique in Measuring Contributions of Individual Components to Wear-Corrosion Synergism

Description
The damage to materials caused by corrosive wear is a complicated surface failure process that involves both the wear-accelerated corrosion and corrosion-accelerated mechanical failure. This synergistic attack that plagues many industrial facilities can cause severe material loss (e.g. erosion-corrosion of tailing pipes for slurry transfer). Although efforts have been made to resist corrosive wear, the […]