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Litvin, US
Andrew Litvin, Wakefield, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20090143973 | IMAGE-GUIDED NAVIGATION EMPLOYING NAVIGATED POINT COMPUTATION METHOD AND SYSTEM - Provided is a method of image-guided navigation comprising determining a final navigated point in a three-dimensional reconstructed coordinate system based at least partially on two or more navigated points in a coordinate system associated with a two-dimensional array of image pixels and without specifying a coordinate of each of the two or more navigated points in a direction orthogonal to the two-dimensional array of image pixels, wherein each of the two or more navigated points is for a different position of a C-arm gantry. Also provided is an image-guided navigation system. | 06-04-2009 |
| 20100183209 | HISTOGRAM-BASED COMPOUND OBJECT SEPARATION - Certain imaging systems, such as automatic explosives detection systems, employ techniques that utilize image processing, feature extraction and decision making steps to detect threats in images. Such techniques use segmentation as a first algorithmic step, which extracts data representing objects from image data. Some of the extracted objects are actually composed of multiple distinct physical objects. For these compound objects discrimination becomes difficult because computed object properties are less specific than properties computed for a single physical object. A technique is described which includes splitting such compound objects by separating the data of each component from the rest of the data and using properties of density histograms based on voxel distributions in both density and spatial domains. | 07-22-2010 |
| 20110188751 | COMPOUND OBJECT SEPARATION - Representations of an object can comprise two or more separate sub-objects, producing a compound object. Compound objects can affect the quality of object visualization and threat identification. As provided herein, a compound object can be separated into sub-objects based on object morphological properties (e.g., an object's shape, surface area). Further, a potential compound object can be split into sub-objects, for example, eroding one or more outer layers of volume space (e.g., voxels) from the potential compound object. Additionally, a volume of a representation of the sub-objects in an image can be reconstructed, for example, by generating sub-objects that have a combined volume approximate to that of the compound object. Furthermore, sub-objects, which can be parts of a same physical object, but may have been erroneously split, can be identified and merged using connectivity and compactness based techniques. | 08-04-2011 |
Andrey Litvin, Waltham, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20080317333 | METHOD AND SYSTEM FOR CORRECTION OF FLUOROSCOPE IMAGE DISTORTION - Certain embodiments of the present invention provide for a system and method for modeling S-distortion in an image intensifier. In an embodiment, the method may include identifying a reference coordinate on an input screen of the image intensifier. The method also includes computing a set of charged particle velocity vectors. The method also includes computing a set of magnetic field vectors. The method also includes computing the force exerted on the charged particle in an image intensifier. Certain embodiments of the present invention include an iterative method for calibrating an image acquisition system with an analytic S-distortion model. In an embodiment, the method may include comparing the difference between the measured fiducial shadow positions and the model fiducial positions with a threshold value. If the difference is less than the threshold value, the optical distortion parameters are used for linearizing the set of acquired images. | 12-25-2008 |
| 20110116693 | METHOD AND SYSTEM FOR CORRECTION OF FLUOROSCOPE IMAGE DISTORTION - Certain embodiments of the present invention provide for a system and method for modeling S-distortion in an image intensifier. In an embodiment, the method may include identifying a reference coordinate on an input screen of the image intensifier. The method also includes computing a set of charged particle velocity vectors. The method also includes computing a set of magnetic field vectors. The method also includes computing the force exerted on the charged particle in an image intensifier. Certain embodiments of the present invention include an iterative method for calibrating an image acquisition system with an analytic S-distortion model. In an embodiment, the method may include comparing the difference between the measured fiducial shadow positions and the model fiducial positions with a threshold value. If the difference is less than the threshold value, the optical distortion parameters are used for linearizing the set of acquired images. | 05-19-2011 |
Kerry Litvin, Huntingdon Valley, PA US
| Patent application number | Description | Published |
|---|---|---|
| 20080292316 | Method and Apparatus for Reducing Crosstalk in a DWDM Transmission System - A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating a plurality of optical channels that are each located at a different wavelength from one another with a respective one of a plurality of information-bearing electrical signals The channel spacings between adjacent ones of the plurality of optical channels are selected such that the optical channels give rise to selected FWM terms that lie outside a channel bandwidth of the optical channels. Each of the modulated optical channels is multiplexed to form a WDM optical signal. The WDM optical signal is then forwarded onto an optical transmission path. | 11-27-2008 |
| 20090310967 | METHOD AND APPARATUS FOR TRANSMITTING MULTIPLE CHANNELS IN A WAVELENGTH DIVISION MULTIPLEXED (WDM) OPTICAL COMMUNICATION SYSTEM WITH REDUCED RAMAN CROSSTALK AND NONLINEAR DISTORTIONS - An improved method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurality of information-bearing electrical signals that all embody the same broadcast information; (2) a respective one of a plurality of RF signals having a common functional broadcast waveform, at least one of the RF signals being out of phase with respect to remaining ones of the plurality of RF signal and (3) at least one of the RF signals being phase adjusted with respect to its original phase. Each of the modulated optical channels is multiplexed to form a WDM optical signal. The WDM optical signal, while maintaining the pre-assigned phase relationships between the modulation signals of the optical channels, is forwarded onto an optical transmission path. | 12-17-2009 |
| 20090316286 | Aligned Narrowband Optical Filters having Flat Passbands and Comprising Offset Cascaded Broadband Optical Filters - A cascaded pair of broad bandwidth optical filters provides an overlap in pass-bands that forms a flat, narrow band optical filter. A first band-pass filter is operable to receive the optical signal and to transmit a first portion of the optical signal. The second band-pass filter receives the first portion of the optical signal transmits a second portion of the optical signal. The first band-pass filter has a first corner-pass wavelength of λ | 12-24-2009 |
Kerry I. Litvin, Huntingdon Valley, PA US
| Patent application number | Description | Published |
|---|---|---|
| 20080247756 | Method and Apparatus for Transmitting Multiple Channels in a Wavelength Division Multiplexed (WDM) Optical Communication System With Reduced Raman Crosstalk and Nonlinear Distortions - A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating an odd number of optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurality of information-bearing electrical signals that all embody the same broadcast information and (2) a respective one of a plurality of RF signals having a common functional broadcast waveform, at least one of the RF signals being out of phase with respect to remaining ones of the plurality of RF signals. Each of the modulated optical channels are multiplexed to form a WDM optical signal. The WDM optical signal is forwarded onto an optical transmission path. | 10-09-2008 |
| 20100303471 | BURST MODE LASER TRANSMITTER HAVING AN EXTREMELY FAST RESPONSE TIME WHEN TRIGGERED FROM A TOTALLY OFF STATE - A burst mode laser transmitter includes a burst mode laser diode and a controller having an input for receiving an RF data signal. The controller includes a triggering arrangement and a modulation arrangement. The triggering arrangement is configured to bias the laser diode to an on-state bias level when an RF data signal is present at the input to the controller and to an off-state bias level when no RF data signal is present at the input to the controller. The modulation arrangement is configured to modulate the on-state bias level at which the laser diode is biased with the RF data signal only when the RF data signal is present at the input of the controller. | 12-02-2010 |
| 20100316382 | Ramen Backpumped Near-Zero Dispersion CWDM System and Method - A system includes an optical transmitter portion, an optical fiber, an optical receiver portion, a laser portion and a combiner portion. Optical signals may be launched by the optical transmitter portion at very low power levels to avoid Raman-induced interactions between the co-propagating signals along the optical fiber. The laser portion and the combiner portion may apply a back-pumped laser signal to the optical fiber. The back-pumped laser signal provides a Raman gain that amplifies the co-propagating signals to a minimum power level such that the optical receiver portion can detect the co-propagating signals within a predetermined acceptable carrier-to-noise ratio. | 12-16-2010 |
Moshe Litvin, Sunnyvale, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090249438 | MOVING SECURITY FOR VIRTUAL MACHINES - A method of maintaining multiple firewalls on multiple host nodes. Each host node runs one or more virtual machines. For at least a first host node, the method maintains multiple sets of policies for multiple virtual machines that run on the first host node. The method, upon detecting that a particular virtual machine has been moved from the first host node to a second host node, removes a set of policies associated with the particular virtual machine from the first host node and supplies the set of policies to the second host node. | 10-01-2009 |
| 20090249470 | COMBINED FIREWALLS - A method of providing a firewall to protect a set of virtual machines on a host node that is one of multiple host nodes that host virtual machines. The method stores a table of allowed connections for each virtual machine on the host node. Upon a particular virtual machine moving from the host node to another host node, the method deletes records of a first set of allowed connections that each identify the particular virtual machine and do not identify any other virtual machine in the set of virtual machines. Also upon the virtual machine moving, the method edits records of a second set of allowed connections, each identifying the particular machine and one other virtual machine in the set of virtual machines on the first host node, to remove an identifier of the particular virtual machine. | 10-01-2009 |
| 20090249471 | REVERSIBLE FIREWALL POLICIES - A method of determining whether to allow multiple data packets to pass a firewall, each data packet having a source address and a destination address. The method evaluates a data packet by using a first set of policies when no previous packet with an opposite address has been allowed under the first set of policies. Two packets have opposite addresses when a source address of the first of the two packets is the same as the destination address of the second of the two packets and the destination address of the first packet is the same as the source address of the second packet. The method evaluates the data packet using a second set of policies when a previous packet with an opposite address has been allowed under the first set of policies. | 10-01-2009 |
| 20090249472 | HIERARCHICAL FIREWALLS - A method of implementing a firewall that receives a layer of policies from each of multiple entities with different levels of authority. The method evaluates received packets based on the received layers of policies. A layer of policies of a higher level of authority can accept a received packet, block the received packet, or delegate a decision of whether to accept or block the received packet to a layer of policies of a lower level of authority. | 10-01-2009 |
| 20110145912 | MEDIA ACCESS CONTROL ADDRESS TRANSLATION IN VIRTUALIZED ENVIRONMENTS - Some embodiments provide a method that transmits network packets through a network security device. The method receives receiving a request to send a network packet from a first computing device to a second computing device over a network that includes the network security device. The network packet includes a first network interface identifier for identifying the first computing device on the network and a second network interface identifier for identifying the second computing device on the network. The method identifies third and fourth network interface identifiers that cause the network packet to be transmitted through the network security device when the network packet is transmitted using the third and fourth network interface identifiers. The method transmits the network packet over the network through the network security device using the third and fourth network interface identifiers. The method transmits the network packet to the second computing device using the first and second network interface identifiers. | 06-16-2011 |
Simon Litvin, Boston, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20090272682 | Filtered Water Enhancements - A system for enhancing water is described. The system includes a housing with an inlet and an outlet, source water at the inlet, which can flow through a filter component in the housing and thus become treated water, and at least one enhancement module that can dispense an enhancement into the treated water as it flows through the outlet. Water can flow through the system only by the force of gravity, pressure in a building's water line, and/or hand pumps. Enhancement that can be used in the system include flavorings, dyes, minerals, vitamins, herbal supplements, nutritional supplements, phytonutrients, probiotics, homeopathic remedies, amino acids, enzymes, hormones, standard prescription medications, and over-the-counter medications, and combinations thereof. A control is also provided, through which a consumer can regulate an amount of enhancement that is added to the treated water. | 11-05-2009 |
| 20100166919 | Control Scheme for Enhanced Filtered Water Systems - An enhancement control system that can be used as part of an enhanced water system to produce enhanced filtered water is described. The enhancement control system includes at least one enhancement delivery element that can dispense an enhancement(s) into filtered water in response to an enhancement delivery instruction(s). The enhancement control system can also include an input element that can enable transmittal of the enhancement delivery instruction(s) from a user to the enhancement delivery element(s). The control system can also include a memory element that can store information about the user and the user's preferences and information about the enhanced water system. The control system can also include a communication element that can provide information from the enhanced water system to the user. The control system can also include a monitor element that can gather data from outside the enhanced water system, such as user health information or environmental information, and provide the data to the enhanced water system. In some embodiments, a control logic element can be used to coordinate and control operation of the elements of the enhanced water system. | 07-01-2010 |
| 20110024456 | Control Scheme For Enhanced Filtered Water Systems - An enhancement control system that can be used as part of an enhanced water system to produce enhanced filtered water is described. The enhancement control system includes at least one enhancement delivery element that can dispense an enhancement(s) into filtered water in response to an enhancement delivery instruction(s). The enhancement control system can also include an input element that can enable transmittal of the enhancement delivery instruction(s) from a user to the enhancement delivery element(s). The control system can also include a memory element that can store information about the user and the user's preferences and information about the enhanced water system. The control system can also include a communication element that can provide information from the enhanced water system to the user. The control system can also include a monitor element that can gather data from outside the enhanced water system, such as user health information or environmental information, and provide the data to the enhanced water system. In some embodiments, a control logic element can be used to coordinate and control operation of the elements of the enhanced water system. | 02-03-2011 |
Tamara Litvin, Woodbridge, CT US
| Patent application number | Description | Published |
|---|---|---|
| 20100266522 | Petrolatum Based Composition Comprising Greater Than 10% Silicone for Improved Feel While Remaining Stable - The present invention discloses petrolatum based composition containing silicone oils which are structured with specific blend and ratio of fatty acids. | 10-21-2010 |
| 20100266524 | Composition Comprising Silicone Oil or Oils Structured With Compolymers Carrying Greater Than 70% Long Chain Alkyl Group - The present invention discloses silicone oils which are structured with a copolymer comprising a large percentage of alkane groups. Using high percentage pendant alkane helps provide silicone with ideal gel properties (G′>G″, particularly >1000 cP, more preferably 2000-30,000 cP) and viscosity, after fracture, of 10 to 1000 cP, preferably 30-500 cP MW of polymer and exact chain length are selected to ensure that, when forming gel upon cooling after mixing polymer and silicone, the polymer viscosity will not be so high upon crystal formation that gel cannot form, yet also will not be so low that polymer will phase separate. | 10-21-2010 |
Timothy J. Litvin, Santa Cruz, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100039712 | REFERENCE BEAM GENERATOR AND METHOD - A reference beam generator has first, second, and third projection turrets for projecting first, second, and third fan beams of laser light, respectively. The first, second, and third fan beams of laser light are oriented normal to each other. The turrets may be rotated such that each of said fan beams can each be rotated about an axis that is normal to the plane in which the fan beam is projected. The generator may be used to project a number of reference points and lines on multiple surfaces. | 02-18-2010 |
Timothy John Litvin, Santa Cruz, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20120055035 | METHOD, APPARATUS, AND DEVICES FOR PROJECTING LASER PLANES - An apparatus is disclosed, along with methods and constituent devices, for generating omnidirectional planar projections for an exemplary laser application to provide visual references for the construction field. The preferred embodiment utilizes a convex cone lens, the lateral surface of which provides for total internal reflection, to disperse the incident beam. The curvatures of the interior and exterior surfaces of a toroidal ring lens normalize and athermalize the dispersed beam such that the resulting projection is orthogonal to the incident beam throughout an operable temperature range. Alternate optical embodiments are also disclosed which utilize various means of dispersal and normalization such as a conical reflector, concave cone lens, double-prism ring and well-adapted spherical lenses. The preferred embodiment is adapted as a portable construction tool by additionally disclosed components including a path-compression prism assembly, an adjustable tripod support adapted to a structural base assembly, and various embodiments of a lens-shield concept. | 03-08-2012 |