Cheang
Bee Lin Cheang, Lexington, MA US
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20150353904 | METHODS FOR PURIFICATION OF ARYSULFATASE A - The present invention provides, among other things, improved methods for purifying arylsulfatase A (ASA) protein produced recombinantly for enzyme replacement therapy. The present invention is, in part, based on the surprising discovery that recombinant ASA protein can be purified from unprocessed biological materials, such as, ASA-containing cell culture medium, using a process involving as few as four chromatography columns and only one step of post-chromatographic ultrafiltration/diafiltration. | 12-10-2015 |
Chak Fong Cheang, Taipa MO
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20150146746 | Method of Providing Mobility Support to Internet Protocol Version 6 (IPv6) using Filtering Technology - A method of providing mobility support to Internet Protocol version 6 (IPv6) using filtering technology is disclosed. The method comprises the steps of: providing a filter layer below the internet layer and above the network access layer in the TCP/IP stack; and modifying the packets using the filter layer. The step of modifying packets further comprises the steps of detecting the movement of a mobile node, and updating the movement of the mobile node to other nodes. The step of detecting the movement of the mobile node further comprises a step of replacing the prefix in the receiving packets before passing the receiving packets to the non-mobility-capable IPv6 module of the internet layer for hiding the movement of the mobile node; The step of modifying the packets also comprises the steps of adding extension headers to the packets, deleting extension headers from the packets and replacing IP addresses of the packets for the survivability of the ongoing connections. | 05-28-2015 |
Chak-Fong Cheang, Taipa CN
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20150280958 | NON-RECURSIVE DIGITAL CALIBRATION FOR JOINT-ELIMINATION OF TRANSMITTER AND RECEIVER I/Q IMBALANCES WITH MINIMIZED ADD-ON HARDWARE - A digital calibration circuit is used to provide joint-elimination of transmitter and receiver I/Q imbalances. Digital I and Q quadrature signals are received and converted to analog I and Q quadrature signals on I and Q for transmission on output channels. An output mixer is used to convert the quadrature signals to an unbalanced RF output. An unbalanced RF signal is received selectively either externally or from the RF output using a source follower, and the received signal is mixed to provide analog I and Q quadrature signals, using a local oscillator (LO). The LO adds an additional 90° phase shift between I and Q quadrature channels of the unbalanced RF input. Parameter estimating the transmitted digital I and Q quadrature signals and providing estimations of I and Q quadrature imbalance conditions. | 10-01-2015 |
Chong I Cheang, San Jose, CA US
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20140049682 | IN-FLIGHT AUTO FOCUS METHOD AND SYSTEM FOR TUNABLE LIQUID CRYSTAL OPTICAL ELEMENT - An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search. | 02-20-2014 |
20150301307 | IN-FLIGHT AUTO FOCUS METHOD AND SYSTEM FOR TUNABLE LIQUID CRYSTAL OPTICAL ELEMENT - An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search. | 10-22-2015 |
Fokkuong Cheang, Union City, CA US
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20140129513 | SUBSET CALCULATION BY IDENTIFYING CALCULATED VALUES WITH MODIFIED PARAMETERS - In some embodiments, a method includes determining a first subset of a plurality of calculated values. Each calculated value of the first subset may comprise at least one modified parameter, in some instances. The method may further, in some embodiments, include determining a second subset of the plurality of calculated values. Each calculated value of the second subset may depend from a calculated value in the first subset, in some embodiments. In some embodiments, the method may also include: calculating updated values for the first subset based on the at least one modified parameter, and calculating updated values for the second subset based on the updated values for the first subset. | 05-08-2014 |
Fok-Kuong Cheang, Union City, CA US
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20140129523 | METHOD & APPARATUS FOR ENABLING AUDITING OF A POSITION BY CREATING A CHAIN OF ACTIVE & INACTIVE RECORDS - A computing apparatus and method of recalculating upon changes to data by saving changes to the data; receiving a request to recalculate a result according to the data; retrieving only active data from the data according to the saved changes to the data; and recalculating the result based upon the active data. | 05-08-2014 |
20140129546 | INCREMENTAL CALCULATION BY AUTO DETECTION OF CHANGES TO DATA - A computing apparatus and method of recalculating upon changes to data by saving changes to the data; receiving a request to recalculate a result according to the data; retrieving only active data from the data according to the saved changes to the data; and recalculating the result based upon the active data. | 05-08-2014 |
Ka M. Cheang, Santa Clara, CA US
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20080305451 | SYSTEM AND METHOD FOR DETECTING DEVIATIONS DURING THE COURSE OF AN ORTHODONTIC TREATMENT TO GRADUALLY REPOSITION TEETH - Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used. | 12-11-2008 |
Ka M. Cheang, Sunnyvale, CA US
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20120225401 | SYSTEM AND METHOD FOR DETECTING DEVIATIONS DURING THE COURSE OF AN ORTHODONTIC TREATMENT TO GRADUALLY REPOSITION TEETH - Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used. | 09-06-2012 |
20140193765 | SYSTEM AND METHOD FOR DETECTING DEVIATIONS DURING THE COURSE OF AN ORTHODONTIC TREATMENT TO GRADUALLY REPOSITION TEETH - Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used. | 07-10-2014 |
20160074138 | SYSTEM AND METHOD FOR DETECTING DEVIATIONS DURING THE COURSE OF AN ORTHODONTIC TREATMENT TO GRADUALLY REPOSITION TEETH - Method and system for detecting and correcting deviation during an orthodontic treatment plan is provided. The method includes the steps of receiving an un-segmented current teeth image representing a patient's teeth after an orthodontic treatment plan has begun and before the plan ends for the patient; matching a previously segmented teeth model with the current teeth image; and generating at least one corrective stage to define an intermediate tooth arrangement, wherein the at least one corrective stage repositions a digital teeth image so that a prescribed tooth arrangement of the previously segmented teeth model can be used. | 03-17-2016 |
Ka Man Cheang, Sunnyvale, CA US
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20160120618 | SYSTEM AND METHOD FOR POSITIONING THREE-DIMENSIONAL BRACKETS ON TEETH - System and methods for positioning 3D virtual brackets on teeth for the precise positioning of conventional brackets and wire. Various reference features may be calculated for the teeth and used to calculate a position for the virtual bracket. Reference features that are calculated include curve of Spee, Andrew's plane, and a facial axis of the clinical crown for the teeth. | 05-05-2016 |
Kar Hin Cheang, Singapore SG
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20140041545 | Projectile With Strike Point Marking - The present invention describes a projectile ( | 02-13-2014 |
Maggie Chon U. Cheang, Vancouver CA
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20150072021 | Methods and Kits for Predicting Outcome and Methods and Kits for Treating Breast Cancer with Radiation Therapy - The application describes methods and kits for screening subjects with breast cancer to determine if the breast cancer will be responsive to a post-mastectomy breast cancer therapy including radiation. The application further describes methods and kits for treating subjects with post-mastectomy breast cancer by screening them for the likelihood of the effectiveness of treating the cancer with a therapy including radiation and administering the therapy in subjects when it is found that radiation is likely to be effective. | 03-12-2015 |