Abstract: A monitoring system for a gas turbine includes a processor configured to receive an operating signal indicating an operating parameter of the gas turbine. The processor is configured to predict an occurrence of a lean blowout (LBO) event based on the operating parameter and an entropy ratio of combustion dynamics associated with a combustor of the gas turbine, wherein the LBO event corresponds to when the combustor stops firing. The processor is configured to send an alarm signal indicating the predicted LBO event to an electronic device prior to the occurrence of the LBO event.

Abstract: Systems and methods for predicting a surge event in a compressor of a turbomachine are provided. According to one embodiment of the disclosure, a system may include one or more computer processors associated with the turbomachine. The one or more computer processors may be operable to receive a plurality of performance parameters of the compressor and analyze the plurality of performance parameters to determine corrected performance values of the performance parameters. Based at least partially on the corrected performance values, a compressor efficiency may be determined. The processor may be further operable to standardize the compressor efficiency for a standard mode of operation, ascertain historical performance data associated with the standard mode of operation, and analyze the compressor efficiency based at least partially on the historical performance data. Based on the analysis of the compressor efficiency, a surge event may be selectively predicted.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: Systems and methods for predicting a surge event in a compressor of a turbomachine are provided. According to one embodiment of the disclosure, a system may include one or more computer processors associated with the turbomachine. The one or more computer processors may be operable to receive a plurality of performance parameters of the compressor and analyze the plurality of performance parameters to determine corrected performance values of the performance parameters. Based at least partially on the corrected performance values, a compressor efficiency may be determined. The processor may be further operable to standardize the compressor efficiency for a standard mode of operation, ascertain historical performance data associated with the standard mode of operation, and analyze the compressor efficiency based at least partially on the historical performance data. Based on the analysis of the compressor efficiency, a surge event may be selectively predicted.

Abstract: A monitoring system for a gas turbine includes a processor configured to receive an operating signal indicating an operating parameter of the gas turbine. The processor is configured to predict an occurrence of a lean blowout (LBO) event based on the operating parameter and an entropy ratio of combustion dynamics associated with a combustor of the gas turbine, wherein the LBO event corresponds to when the combustor stops firing. The processor is configured to send an alarm signal indicating the predicted LBO event to an electronic device prior to the occurrence of the LBO event.

Abstract: Systems and methods for determining risk to operating a turbomachine are provided. According to one embodiment of the disclosure, a method may include receiving historical risk profile data associated with a fleet of turbomachines by at least one processor from a repository. The method can also include receiving ambient conditions of an environment in which a turbomachine is to be operated. Based at least in part on the historical risk profile data and in view of the ambient conditions, at least one risk threshold for at least one known operating profile can be developed. The method may continue with determining that the at least one risk threshold for the at least one known operating profile is reached. Based at least in part on a determination that the at least one risk threshold is reached, a mitigating action associated with the turbomachine can be taken.

Abstract: A projector and one or more optical components project a light pattern that scans at least a portion of an anterior segment of an eye of a user, while one or more cameras capture images of the anterior segment. During each scan, different pixels in the projector emit light at different times, causing the light pattern to repeatedly change orientation relative to the eye and thus to illuminate multiple different cross-sections of the anterior segment. The cameras capture images of each cross-section from a total of at least two different vantage points relative to the head of the user. The position of the projector, optical components and cameras relative to the head of the user remains substantially constant throughout each entire scan.

Abstract: In exemplary implementations, this invention comprises apparatus for retinal self-imaging. Visual stimuli help the user self-align his eye with a camera. Bi-ocular coupling induces the test eye to rotate into different positions. As the test eye rotates, a video is captured of different areas of the retina. Computational photography methods process this video into a mosaiced image of a large area of the retina. An LED is pressed against the skin near the eye, to provide indirect, diffuse illumination of the retina. The camera has a wide field of view, and can image part of the retina even when the eye is off-axis (when the eye's pupillary axis and camera's optical axis are not aligned). Alternately, the retina is illuminated directly through the pupil, and different parts of a large lens are used to image different parts of the retina. Alternately, a plenoptic camera is used for retinal imaging.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: In exemplary implementations, this invention comprises apparatus for retinal self-imaging. Visual stimuli help the user self-align his eye with a camera. Bi-ocular coupling induces the test eye to rotate into different positions. As the test eye rotates, a video is captured of different areas of the retina. Computational photography methods process this video into a mosaiced image of a large area of the retina. An LED is pressed against the skin near the eye, to provide indirect, diffuse illumination of the retina. The camera has a wide field of view, and can image part of the retina even when the eye is off-axis (when the eye's pupillary axis and camera's optical axis are not aligned). Alternately, the retina is illuminated directly through the pupil, and different parts of a large lens are used to image different parts of the retina. Alternately, a plenoptic camera is used for retinal imaging.

Abstract: In exemplary implementations, this invention comprises apparatus for retinal self-imaging. Visual stimuli help the user self-align his eye with a camera. Bi-ocular coupling induces the test eye to rotate into different positions. As the test eye rotates, a video is captured of different areas of the retina. Computational photography methods process this video into a mosaiced image of a large area of the retina. An LED is pressed against the skin near the eye, to provide indirect, diffuse illumination of the retina. The camera has a wide field of view, and can image part of the retina even when the eye is off-axis (when the eye's pupillary axis and camera's optical axis are not aligned). Alternately, the retina is illuminated directly through the pupil, and different parts of a large lens are used to image different parts of the retina. Alternately, a plenoptic camera is used for retinal imaging.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: In exemplary implementations, this invention comprises apparatus for retinal self-imaging. Visual stimuli help the user self-align his eye with a camera. Bi-ocular coupling induces the test eye to rotate into different positions. As the test eye rotates, a video is captured of different areas of the retina. Computational photography methods process this video into a mosaiced image of a large area of the retina. An LED is pressed against the skin near the eye, to provide indirect, diffuse illumination of the retina. The camera has a wide field of view, and can image part of the retina even when the eye is off-axis (when the eye's pupillary axis and camera's optical axis are not aligned). Alternately, the retina is illuminated directly through the pupil, and different parts of a large lens are used to image different parts of the retina. Alternately, a plenoptic camera is used for retinal imaging.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: An installer application implemented in a computational device receives a command to install a test application in the computational device. The installer application determines whether a selected port of a plurality of ports of the computational device is to be blocked prior to installing the test application in the computational device. In response to determining that the selected port is to be blocked prior to installing the test application in the computational device, the installer application blocks the selected port, installs the test application by binding a socket to the selected port of the plurality of ports, and tests functions of the test application by executing one or more code paths of the test application, in response to installing the test application.

Abstract: An ophthalmic imaging device for improved ophthalmic imaging including: an optical coherence scanning device, a fundus imaging device: an iris viewer; a motorized chin rest; an internal test target, and a fixation target device wherein the optical coherence scanning device, the ophthalmic scanning device, the iris viewer, and the fixation target device all share at least one common optical element. The optical coherence device preferably employs a Mach-Zehnder interferometer with an all fiber reference path; monitoring and attenuating power within the reference path. The multiple devices are separately and in combination aligned with the eye. The system includes internal and external calibration and improved image formats.

Abstract: Various methods are disclosed for mapping optical coherence tomography (OCT) data to facilitate review and diagnosis. In one aspect, high resolution 2D line scans are obtained along with lower density 3D cube scans and displayed in a manner to provide context to the clinician. In another aspect, OCT data is analyzed to provide information about non-uniformities of the tissue. Binary image maps of maps useful for determining tautness of membranes are also disclosed.

Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.