| Dalhousie University Patent applications |
| Patent application number | Title | Published |
|---|
| 20120088957 | SUBCUTANEOUS PIEZOELECTRIC BONE CONDUCTION HEARING AID ACTUATOR AND SYSTEM - An implantable bone-conduction hearing actuator based on a piezoelectric element, such as a unimorph or bimorph cantilever bender, is described. Unlike other implantable bone conduction hearing actuators, the device is subcutaneous and once implanted is entirely invisible. The device excites bending in bone through a local bending moment rather than the application of a point force as with conventional bone-anchored hearing aids. | 04-12-2012 |
| 20120016243 | HIGH-FREQUENCY ULTRASOUND IMAGING SYSTEM - A high frequency ultrasound analog beamformer comprises a linear array of surface acoustic wave (SAW) devices formed on a single crystal piezoelectric substrate, such as a PMN-PT single crystal piezoelectric substrate. Each SAW device comprises ultrasound input and output electrode structures separated by a variable delay structure. The beamformer further comprises a delay controller operably connected to each variable delay structure to control the delay of each SAW device to dynamically focus signals received at each input electrode. | 01-19-2012 |
| 20110185998 | TOROIDAL ENGINE - A toroidal engine that can be powered by a fuel/air mixture or by a compressed gas source. The toroidal engine uses one-way bearings to transfer torque generated in a toroidal chamber directly to a drive shaft. Pairs of pistons are mounted on two crank assemblies, which are concentric with the drive shaft. One-way bearings allow the crank assemblies to turn, one at a time, in one direction only. The crank assemblies are directly coupled to the drive shaft, which eliminates the need for complex gear and linkage arrangements. A system can be used with the toroidal engine to alternately stop the crank assemblies at a pre-determined position and to time the ignition of the engine. | 08-04-2011 |
| 20100285053 | Immunosuppressive Extract Of Cordyceps Sinensis And Uses Thereof - The present invention described herein relates to aqueous extracts of | 11-11-2010 |
| 20100226449 | Method and System for Reducing the Peak-to-Average Power Ratio - This invention provides a method and system for reducing the PAPR. The method involves (i) intentionally inserting error(s) into the time or frequency domain and (ii) employing various bit mapping schemes to provide a significant reduction in the PAPR. An embodiment of the error insertion of the method involves intentionally inserting symbol error(s) into the quadrature amplitude modulation (QAM) symbol stream before applying discrete Fourier transform in OFDM. The method trades off the coding gain of the system for the PAPR reduction of the OFDM signals and does not require transmission of side information. It further has reduced complexity and improved bit error rate (BER) performance when used with a typical non-linear amplifier as compared to alternative existing methods (Gray coding, tone injection, tone reservation, etc.) | 09-09-2010 |
| 20100089161 | Vibration Based Damage Detection System - The present invention provides methods of assessing damage on a joint that includes energizing the joint, detecting the vibration of the joint using one or more signal generating sensors, processing the signal(s), and applying a damage index to the processed signal(s), wherein the damage index incorporates a processed control signal generated by a sensor(s) at or near the joint when the joint was healthy, i.e., in a substantially undamaged state. Another aspect of the present invention provides a pipeline that includes at least two pipe segments, at least one joint connecting the two pipe segments, and at least one signal generating sensor affixed to the pipeline that is capable of detecting vibration at or near the joint, at least one signal processor that is capable of EMD processing the signal, and an output device (e.g., computer monitor, LED display, a light bulb, an electronic alarm, or other sound or light generating device). | 04-15-2010 |
