Patents Assigned to Polytechnic University
  • HIGH-QUALITY NON-POLAR/SEMI-POLAR SEMICONDUCTOR DEVICE ON POROUS NITRIDE SEMICONDUCTOR AND MANUFACTURING METHOD THEREOF
    Publication number: 20120205665
    Abstract: Provided are a high-quality non-polar/semi-polar semiconductor device having reduced defect density of a nitride semiconductor layer and improved internal quantum efficiency and light extraction efficiency, and a manufacturing method thereof. The method for manufacturing a semiconductor device is to form a template layer and a semiconductor device structure on a sapphire, SiC or Si substrate having a crystal plane for a growth of a non-polar or semi-polar nitride semiconductor layer. The manufacturing method includes: forming a nitride semiconductor layer on the substrate; performing a porous surface modification such that the nitride semiconductor layer has pores; forming the template layer by re-growing a nitride semiconductor layer on the surface-modified nitride semiconductor layer; and forming the semiconductor device structure on the template layer.
    Type: Application
    Filed: August 27, 2010
    Publication date: August 16, 2012
    Applicants: KOREA POLYTECHNIC UNIVERSITY Industry Academic Cooperation Foundation, SEOUL OPTO DEVICE CO., LTD.
    Inventors: Ok Hyun Nam, Dong Hun Lee, Geun Ho Yoo
  • Biodegradable and bioabsorbable biomaterials and keratin fibrous articles for medical applications
    Patent number: 8242073
    Abstract: The present invention relates to a process of making biodegradable and/or bioabsorbable biomaterials and keratin nonwoven fibrous articles by electrospinning fibers from a blend of biomaterials and keratin dissolved in organic solvents includes generating a high voltage electric field between oppositely charged biomaterials and keratin fluid in a syringe with a capillary tip and a metallic collection roller and causing a jet to flow to the roller as solvent evaporates and collecting fibrous membranes or scaffolds on the roller. Keratin increased the cell affinity of biomaterial scaffolds which have potential medical applications.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: August 14, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Yi Li, Jiashen Li, Junyan Hu, Lin Li
  • METHOD AND SYSTEM FOR MULTISPECTRAL PALMPRINT VERIFICATION
    Publication number: 20120194662
    Abstract: A method for palmprint verification of an individual that includes illuminating a palm of an individual with a plurality of spectral bands, collecting a plurality of palmprint images that are illuminated under the different spectral bands, locating a sub-image from each of the plurality of palmprint images, extracting palmprint feature maps from the sub-images, determining a palmprint matching score for each of the spectral bands based on the palmprint feature maps, computing a fused score by combining at least two of the palmprint matching scores under different spectral bands, without double-counting overlapping regions, and comparing the fused score with a threshold score from a database.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 2, 2012
    Applicant: THE HONG KONG POLYTECHNIC UNIVERSITY
    Inventors: Dapeng David Zhang, Zhenhua Guo, Guangming Lu, Nan Luo
  • FIBER IN-LINE MACH-ZEHNDER INTERFEROMETER (MZI) DEVICE
    Publication number: 20120188553
    Abstract: A fiber-inline MZI device for temperature sensing or refractive index (RI) sensing, the device comprising: a section of a Photonic Crystal Fiber (PCF) having at least two air holes infiltrated with a liquid analyte to form a waveguide channel, the liquid analyte forming rods in the PCF; wherein the rods leave an interference fringe pattern in the transmission spectrum when light is injected into the PCF, and fringe dips are tracked over a wide wavelength range in order to sense the temperature or refractive index.
    Type: Application
    Filed: June 28, 2011
    Publication date: July 26, 2012
    Applicant: The Hong Kong Polytechnic University
    Inventors: Dongning Wang, Minwei Yang
  • Textiles with chitosan core-shell particles
    Patent number: 8226962
    Abstract: The present invention describes a novel antibacterial treatment on textile materials using polymeric core-shell particles dispersing in water. These particles are prepared from a surfactant-free emulsion polymerization according to the method of U.S. Pat. No. 6,573,313 and have average particle sizes in the range of 100 to 1000 nm in diameter. When applied to a textile article, the particles form a uniform coating, which prevents the growth of bacteria and microbes. The treatment does not affect the fabric mechanical properties, hand feeling and appearance. Antibacterial activity on cotton is maintained even after 50 times of home laundering.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: July 24, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: John Haozhong Xin, Pei Li, Weijun Ye
  • Method and apparatus for personal identification using palmprint and palm vein
    Patent number: 8229178
    Abstract: A method of personal identification includes switching between visible and near infrared light, acquiring palmprint image and palm vein image from a person under the visible and the near infrared light, extracting sub-images from the palmprint image and the palm vein image based on a region of interest, extracting multiple features from the sub-images, and matching the extracted multiple features with stored information in a database to authenticate the person.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: July 24, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: David Zhang, Guangming Lu, Zhenhua Guo, Nan Luo
  • Energy-saving controller for three-phase induction motors
    Patent number: 8217618
    Abstract: The present invention relates to an energy-saving system for three-phase induction motors and is based on the principle of variable voltage control at constant speed. It is composed of a microprocessor, exampling circuit, sensing circuit, acquiring circuit, firing circuit, and AC to AC converter. The system is to automatically adjust the voltage to the induction motor with the variation in the motor load, in order to obtain high operating power factor and efficiency. The system will result in considerable energy-savings when a three-phase induction motor runs under constant light-load or variable-load with low duty ratio.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: July 10, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Ka Wai Eric Cheng, Xiangdang Xue
  • Ligands for transition-metals and methods of use
    Patent number: 8212056
    Abstract: The present invention relates to indolyl phosphine ligands, and methods of making such ligands utilizing phenyl hydrazines and aryl ketones as the starting material. The present invention further includes uses of the ligands in the synthesis of pharmaceuticals, materials, and agriculture.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: July 3, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Fuk Yee Kwong, Chau Ming So
  • Method and system for identifying a person using their finger-joint print
    Patent number: 8208692
    Abstract: A method for identifying a person using their finger-joint print including the outer skin around the proximal interphalangeal joint of a finger, the method comprising: capturing (10) an image of the finger-joint print of the person; extracting (12) a region of interest (ROI) based on a local convexity property of the finger-joint print; extracting (13) features representing the orientation of the lines in a finger-joint print image from the ROI using an extended Gabor phase coding scheme and the extracted features are represented in competitive code maps; wherein angular distance between the competitive code maps is compared (14) with a reference set in a database to identify the person.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: June 26, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Lei Zhang, Lin Zhang, Hailong Zhu, David Zhang, Nan Luo
  • Ankle-foot orthosis prescription assistive device
    Patent number: 8197425
    Abstract: A measurement device (10) for quantitatively measuring stiffness, torque or range of motion (ROM) around the joint axis of the ankle-foot complex of a lower limb in the sagittal and coronal planes, the device (10) comprising: a plate (13, 21) for placement of the ankle-foot complex, the plate (13, 21) operatively connected to an actuator (14, 16) for manual actuation; an angular measurement device (12, 17) to measure an angular position of the ankle-foot complex; a torquemeter (11) to measure resistance torque of the ankle-foot complex; an electromyograph (48) to monitor muscular activity of muscles of the lower limb; and computer software to record the measured angular position, resistance torque of the ankle-foot complex and EMG of the lower limb muscles.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: June 12, 2012
    Assignee: Hong Kong Polytechnic University
    Inventors: Toshiki Kobayashi, Kam Lun Leung, Yasushi Akazawa, Satoru Maeda, Toshiya Nakamura
  • Method for manufacturing fabric strain sensors
    Patent number: 8191433
    Abstract: A fabric strain sensor (10) for measuring in-plane unidirectional strain, the sensor (10) comprising a mixture (20) of electrically conductive particles or fibers and an elastomer matrix, applied onto an elastic fabric substrate (30).
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 5, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: XiaoMing Tao, GuangFeng Wang, YangYong Wang, Hui Zhang
  • Personal tracking device with low power consumption
    Patent number: 8195192
    Abstract: An portable tracking device integrating a mobile phone module (e.g. based on GSM or 3G networks), a GPS module, a radio Beacon and ultrasonic beacon. The tracking device is normally in a hibernated state when the entire device consumes little energy and require no periodically changing or recharging batteries to power the device. It consumes power from the primary battery only when a tracking process is actually taken place. With this portable tracking device on the person who is unable to affirmatively report his or her whereabout, the remote center and/or a search team can communicate the GPS module, radio beacon and ultrasonic beacon of the tracking device via the mobile phone module based on existing wireless communication technologies, such SMS, GPRS, ect, on GSM or 3 G networks, which also serves as a means of initial rough estimation of the tracking device's location.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: June 5, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Hoi Lam Martin Chow, Ching Ching Jenny Chung, Kam Yuk Claudia Lai, Hor Yau Carrie Lee, Kam Wah Ma, Ping See Diana Mak, Ping Kong Alexander Wai, Fuk Tat Arthur Mak, Jia Jane You, Kai Yu Tong, Yongping Zheng
  • Method and system for encoding and decoding low-density-parity-check (LDPC) codes
    Patent number: 8196012
    Abstract: An approximated lower-triangle structure for the parity-check matrix of low-density parity-check (LDPC) codes which allows linear-time-encoding complexity of the codes is disclosed, and the parity part of the parity-check matrix is semi-deterministic which allows high flexibility when designing the LDPC codes in order to provide higher error-correction capabilities than a typical dual-diagonal structure.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: June 5, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Chung Ming Lau, Wai Man Tam, Chi Kong Tse
  • (?)-epigallocatechin gallate derivatives for inhibiting proteasome
    Patent number: 8193377
    Abstract: (?)-EGCG, the most abundant catechin, was found to be chemopreventive and anticancer agent. However, (?)-EGCG has at least one limitation: it gives poor bioavailability. This invention provides compounds of generally formulae below, wherein R11, R12, R13, R21, R22, R2, R3, and R4 are each independently selected from the group consisting of —H, and C1 to C10 acyloxyl group; and R5 is selected from the group consisting of —H, C1-C10-alkyl, C2-C10-alkenyl, C2-C10-alkynyl, C3-C7-cycloalkyl, phenyl, benzyl and C3-C7-cycloalkenyl, whereas each of the last mentioned 7 groups can be substituted with any combination of one to six halogen atoms; at least one of R11, R12, R13, R21, R22, R2, R3 and R4 is —H, which were found to be more potent than their non-protected counterparts, which can be used as proteasome inhibitors to reduce tumor cell growth.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: June 5, 2012
    Assignees: The Hong Kong Polytechnic University, Wayne State University, University of South Florida
    Inventors: Tak-Hang Chan, Wai-Har Lam, Larry Ming-Cheung Chow, Qing Ping Dou, Deborah Joyce Kuhn, Aslamuzzaman Kazi, Sheng Biao Wan, Kristin R. Landis-Piwowar
  • METHOD FOR FABRICATION OF SILICONE COMPOSITE WITH ANTIMICROBIAL COATING
    Publication number: 20120135250
    Abstract: An antimicrobial article prepared by a method includes forming an antimicrobial mixture by adding a calculated amount of antimicrobial agent to a solution of water and alcohol, depositing the antimicrobial mixture in a container, the antimicrobial mixture having a thickness of 0.1 ?m to 10 ?m, evaporating the water and alcohol of the antimicrobial mixture to form the layer of antimicrobial coating, adding silicone resin on top of the layer of antimicrobial coating and allow the silicone resin to permeate and crosslink with the layer of antimicrobial coating, and removing the silicone composite with the layer of antimicrobial coating from the container.
    Type: Application
    Filed: February 2, 2012
    Publication date: May 31, 2012
    Applicant: The Hong Kong Polytechnic University
    Inventors: Chak Yin TANG, Da-zhu CHEN, Tai Man YUE, Yuen Yee CHAN
  • METHOD FOR PRECIPITATING A SOLUTE FROM A SOLUTION
    Publication number: 20120130066
    Abstract: A solute is precipitated from a solution of a solute, a solvent and a non-solvent by preparing the solutions and introducing the solution into a precipitation chamber contain a supercritical fluid.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 24, 2012
    Applicant: THE HONG KONG POLYTECHNIC UNIVERSITY
    Inventors: Yi Li, Footim Chau, Aizheng Chen, Junyan Hu, Tsuiyan Lau
  • METHOD AND SYSTEM FOR DETECTING ISCHEMIC STROKE
    Publication number: 20120114205
    Abstract: A method for assisting diagnosis of stroke by image analysis, the method comprising obtaining a scanned brain image of a patient, transforming the scanned brain image into a digitized brain image, removing bone and other artifacts from the digitized brain image, generating at least one circular adaptive region of interest on one side of the brain image, generating a binary mask of the circular adaptive region of interest, calculating the percentage of zeros from the binary mask within the circular adaptive region of interest, locating at least one corresponding circular adaptive region of interest on the other side of the brain image, and comparing the circular adaptive region of interest with the corresponding circular adaptive region on interest of the other side of the brain based on a plurality of texture attributes.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 10, 2012
    Applicant: THE HONG KONG POLYTECHNIC UNIVERSITY
    Inventors: Fuk Hay Tang, Kei Shing Ng, Hung Kay Chow
  • Cooperative wireless communications
    Patent number: 8175003
    Abstract: When it is advantageous to do so, a wireless LAN station sends data packets to a destination station via an intermediate station, instead of to the destination station directly. That is, the intermediate station, which serves as a helper to the source, forwards packets received from the source station to the intended destination station. This cooperative data transmission approach can result in system performance improvement, as long as the total time consumed by two-hop transmission (i.e., transmission via the helper station) is less than direct transmission. Such a determination may be made using rate information stored at each station. Specifically, using the rate information, signaling needed to set up a transmission, the amount of data to be transmitted, etc., transmitting the data directly and via a help station may be compared.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: May 8, 2012
    Assignee: Polytechnic University
    Inventors: Shivendra S. Panwar, Pei Liu, Zhifeng Tao
  • Detection system for assisting a driver when driving a vehicle using a plurality of image capturing devices
    Patent number: 8174375
    Abstract: A detection system (5) for assisting a driver when driving a vehicle, the system (5) comprising: a plurality of image capturing devices (98) mounted to the vehicle to capture images of the external environment of the vehicle; an image processing module (95) to identify potential hazards in real-time from the captured images and to superimpose information of the external environment relating to the identified potential hazards; and at least one display device (92) to display images processed by the image processing module in real-time; wherein the superimposed information is provided in an area of the display device (92) to ensure visual clarity of the images of the external environment.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: May 8, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Bernard Cheuk Mun Fong, Wan Chi Siu
  • Scheduling the dispatch of cells in non-empty virtual output queues of multistage switches using a pipelined hierarchical arbitration scheme
    Patent number: RE43466
    Abstract: A pipeline-based matching scheduling approach for input-buffered switches relaxes the timing constraint for arbitration with matching schemes, such as CRRD and CMSD. In the new approach, arbitration may operate in a pipelined manner. Each sub-scheduler is allowed to take more than one time slot for its matching. Every time slot, one of them provides a matching result(s). The sub-scheduler can use a matching scheme such as CRRD and CMSD.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: June 12, 2012
    Assignee: Polytechnic University
    Inventors: Eiji Oki, Hung-Hsiang Jonathan Chao, Roberto Rojas-Cessa