| The Royal Institution for the Advancement of Learning / McGill University Patent applications |
| Patent application number | Title | Published |
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| 20110282828 | METHOD OF IDENTIFICATION AND DEVICES THEREOF - Portable wireless devices are ubiquitous in modern society and many of these have integral sensors such as accelerometers, microphones, and Global Positioning Systems (GPS) that can collect data. This creates potential for intelligent applications to recognize the user, or aspects of the user and take appropriate action. According to embodiments of the invention there are presented techniques for representing such time series data which reduce the memory and computational complexity of performing the analysis and classifying the results. The techniques exploit time-delay embedding is to reconstruct the state and dynamics of an unknown dynamical system, Geometric Template Matching to build nonparametric classifiers, and algorithms to address the problem of selecting segments of data from which to build the time-delay models for classification problems. | 11-17-2011 |
| 20110271411 | METHOD AND APPARATUS FOR MEASURING CANTILEVER DEFLECTION IN CONSTRAINED SPACES - Atomic Force Microscopes (AFMs) allow forces within systems under observation to be probed from the piconewton forces of a single covalent bond to the forces exerted by cells in the micronewton range. The pendulum geometry prevents the snap-to-contact problem afflicting soft cantilevers in AFMs which enable attonewton force sensitivity. However, the microscopic length scale studies of cellular/subcellular forces parallel to the imaging plane of an optical microscope requires high sensitivity force measurements at high sampling frequencies despite the difficulties of implementing the pendulum geometry from constraints imposed by the focused incoming/outgoing light interfering with the sample surface. Additionally measurement systems for biological tissue samples in vitro must satisfy complex physical constraints to provide access to the vertical cantilever. Embodiments of the invention address these geometrical restrictions by exploiting optical periscope approaches that further allows multiple probes to be deployed and multiple optical beams within each probe. | 11-03-2011 |
| 20110231731 | METHOD AND SYSTEM FOR DECODING - Low-Density Parity-Check (LDPC) codes offer error correction at rates approaching the link channel capacity and reliable and efficient information transfer over bandwidth or return-channel constrained links with data-corrupting noise present. LDPC codes also offer error correction performance approaching channel capacity exponentially fast in terms of the code length, linear processing complexity, and parallelism that scales with the code length. They also offer challenges relating to the decoding complexity of the binary error-correction codes themselves and error floors limiting achievable bit-error rates. A new Relaxed Half-Stochastic (RHS) decoding algorithm is presented that reduces decoding complexity for high decoding throughput applications. The RHS algorithm uses an approach based on stochastic decoding algorithms but differs significantly from the conventional approaches of LDPC decoder implementation. The RHS algorithm also leads to a randomized decoding technique called redecoding that addresses the error floor limitation. | 09-22-2011 |
| 20110163421 | Method for Fabricating Optical Semiconductor Tubes and Devices Thereof - Semiconductor micro- and nanotubes allow the incorporation of ordered structures such as quantum wells and quantum dots into them providing the potential for ultralow threshold micro- and nanoscale lasers for use in applications such as future ultrahigh-speed photonic systems as well as quantum information processing. According to the invention a means of manufacturing these with high reproducibility, low processing complexity, and at high densities is provided. Also provided is a means of releasing these micro- and nanotubes with low stress and a method of “pick-and-place” allowing micro- and nanotubes to be exploited in devices integrated on substrates that are either incompatible with the manufacturing technique or where the area of substrate required to manufacture them is detrimental to the cost or performance of the circuit. | 07-07-2011 |
| 20110127490 | Method of Growing Uniform Semiconductor Nanowires without Foreign Metal Catalyst and Devices Thereof - Amongst the candidates for very high efficiency solid state lights sources and full solar spectrum solar cells are devices based upon InGaN nanowires. Additionally these nanowires typically require heterostructures, quantum dots, etc which all place requirements for these structures to be grown with relatively few defects. Further manufacturing requirements demand reproducible nanowire diameter, length etc to allow these nanowires to be embedded within device structures. Additionally flexibility according to the device design requires that the nanowire at the substrate may be either InN or GaN. According to the invention a method of growing relatively defect free nanowires and associated structures for group III—nitrides is presented without the requirement for foreign metal catalysts and overcoming the non-uniform growth of prior art non-catalyst growth techniques. The technique also allows for unique dot-within-a-dot nanowire structures. | 06-02-2011 |
| 20110111545 | LOW TEMPERATURE CERAMIC MICROELECTROMECHANICAL STRUCTURES - A method of providing microelectromechanical structures (MEMS) that are compatible with silicon CMOS electronics is provided. The method providing for processes and manufacturing sequences limiting the maximum exposure of an integrated circuit upon which the MEMS is manufactured to below 350° C., and potentially to below 250° C., thereby allowing direct manufacturing of the MEMS devices onto electronics, such as Si CMOS circuits. The method further providing for the provisioning of MEMS devices with multiple non-conductive structural layers such as silicon carbide separated with small lateral gaps. Such silicon carbide structures offering enhanced material properties, increased environmental and chemical resilience whilst also allowing novel designs to be implemented taking advantage of the non-conductive material of the structural layer. The use of silicon carbide being beneficial within the formation of MEMS elements such as motors, gears, rotors, translation drives, etc where increased hardness reduces wear of such elements during operation. | 05-12-2011 |
| 20110024771 | Optically Interrogated Solid State Biosensors Incorporating Porous Materials - Devices and Methods of Fabrication - Quantitative understanding of neural and biological activity at a sub-millimeter scale requires an integrated probe platform that combines biomarker sensors together with electrical stimulus/recording sites. Optically addressed biomarker sensors within such an integrated probe platform allows remote interrogation from the activity being measured. Monolithic or hybrid integrated silicon probe platforms would beneficially allow for accurate control of neural prosthetics, brain machine interfaces, etc as well as helping with complex brain diseases and disorders. According to the invention a silicon probe platform is provided employing ultra-thin silicon in conjunction with optical waveguides, optoelectronic interfaces, porous filter elements, and integrated CMOS circuitry. Such probes allowing simultaneously analysis of both neural electrical activities along with chemical activity derived from multiple biomolecular sensors with porous membrane filters. Such porous silicon and polymer filters providing biomolecular filtering and optical filtering being compatible with post-processing wafers with integrated CMOS electronics. | 02-03-2011 |
| 20100074381 | METHODS AND SYSTEMS FOR IMPROVING ITERATIVE SIGNAL PROCESSING - A method for iteratively decoding a set of encoded samples received from a transmission channel is provided. A data signal indicative of a noise level of the transmission channel is received. A scaling factor is then determined in dependence upon the data signal and the encoded samples are scaled using the scaling factor. The scaled encoded samples are then iteratively decoded. Furthermore, a method for initializing edge memories is provided. During an initialization phase initialization symbols are received from a node of a logic circuitry and stored in a respective edge memory. The initialization phase is terminated when the received symbols occupy a predetermined portion of the edge memory. An iterative process is executed using the logic circuitry storing output symbols received from the node in the edge memory and a symbol is retrieved from the edge memory and provided as output symbol of the node. Yet further an architecture for a high degree variable node is provided. A plurality of sub nodes forms a variable node for performing an equality function in an iterative decoding process. Internal memory is interposed between the sub nodes such that the internal memory is connected to an output port of a respective sub node and to an input port of a following sub node, the internal memory for providing a chosen symbol if a respective sub node is in a hold state, and wherein at least two sub nodes share a same internal memory. | 03-25-2010 |
