Abstract: A medical imaging device for use in imaging a subject using both gamma rays and light rays emanating from the subject, the device comprising: separation means to separate gamma rays and light rays emanating from the subject into a gamma ray channel comprising gamma rays and a light ray channel comprising light rays; first sensor means arranged to receive and detect gamma rays from the gamma ray channel and to generate first signals for use in forming a first image of the subject; second sensor means arranged to receive and detect light rays from the light ray channel and to generate second signals for use in forming a second image of the subject; wherein the first sensor means and the second sensor means are arranged to receive gamma rays and light rays, respectively, which propagate from the subject upon substantially coincident paths.

Abstract: A system for providing continuous positive air pressure therapy is provided. The system includes a patient interface, a flow generator, a sensor, and a computing device. Wireless transceivers allow wireless communication between the computing device and the flow generator and/or patient interface. Sensor data is communicated to the computing device and a leak determination is made by the computing device based on the sensor data. If a leak is detected, then troubleshooting options for correcting the leak are displayed to the patient on a display of the computing device. The troubleshooting options may be selected based on the sensed data, the type of patient interface, the type of flow generator, or characteristics of the patient using the device.

Abstract: A method is provided for managing over-the-top delivery of content through a plurality of content delivery networks (CDN). The method provided works transparently with standard HTTP servers supporting an initial request for content from a client to a first preferred CDN. If the first CDN does not have the content, the method includes provisions for the first CDN to acquire the content from a second CDN, or for the client to request the content from a second CDN directly. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: An improved treatment of manure from animal husbandry results from using a hybrid upflow, anaerobic contact reactor that maintains a flocculent bed of solids in combination with a microfiltration/ultrafiltration system and a recycle flow arrangement. This hybrid anaerobic contact reactor arrangement provides a high conversion of COD and volatile suspended solids in the anaerobic contact reactor by maintaining a flocculent region of solids and direct recycle of an aliquot portion of the effluent stream from the anaerobic contact reactor. The direct recycle facilitates the adjustment of the hydraulic retention time versus the solids retention time within the anaerobic contact reactor. The provision of concentrate from the microfiltration/ultrafiltration system increases solids retention time in the anaerobic contact reactor. This arrangement eliminates additional processing steps and equipment typically used in treating flush manure.

Abstract: A method of recovering ammonia bicarbonate from a biogas and digestate liquor uses an arrangement of equipment in an operational arrangement that requires relatively modest capital investment and that operates with simplicity to provide solid ammonia bicarbonate. In a specific form the method achieves this by upgrading of biogas to produce a rejected stream having a high mole fraction of CO2 at an elevated pressure that eliminates the need for further compression when using the CO2 for recovery of ammonia bicarbonate. The method operates can operate at a high pH produced inherently in a digestate stripper by concurrently stripping dissolved CO2 from solution to improve the simplicity of solid AB recovery.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for managing over-the-top delivery of content through a plurality of content delivery networks (CDN). The method provided works transparently with standard HTTP servers supporting an initial request for content from a client to a first preferred CDN. If the first CDN does not have the content, the method includes provisions for the first CDN to acquire the content from a second CDN, or for the client to request the content from a second CDN directly. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: Live streaming video content is processed and stored for real-time delivery of the content, future VoD viewing of the content, and time-shifted viewing of the content, by manipulating a common manifest or playlist. Previously stored content may be reordered and/or recombined in order to provide a personalized content viewing experience.

Abstract: The methods are disclosed for sustaining a population of microorganisms in an aqueous fermentation broth used in a process to convert syngas to alcohol when the supply of syngas is impaired. The methods involve supplying at least one formate moiety at a rate and amount sufficient to maintain the population of microorganisms. The introduction of the formate moiety also results in the production of at least one metabolic compound other than ethanol and/or acetate by the microorganisms. The metabolic compound can comprise at least one energy storage compound which can be used to support the microorganisms during processing, storage and reactivation.

Abstract: A system and method for concentrating and removing suspended solids from a liquid stream using a filtering device to separate the liquid stream into a permeate stream and a retentate stream, the retentate stream having a higher concentration of particles than the liquid stream or the permeate stream, and providing the retentate stream to a liquid recovery zone to separate the retentate stream into a clarified fluid stream and a concentrated particle stream.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for managing key rotation (use of series of keys) and secure key distribution in over-the-top content delivery. The method provided supports supplying a first content encryption key to a content packaging engine for encryption of a first portion of a video stream. Once the first content encryption key has expired, a second content encryption key is provided to the content packaging engine for encryption of a second portion of a video stream. The method further provides for notification of client devices of imminent key changes, as well as support for secure retrieval of new keys by client devices. A system is also specified for implementing a client and server infrastructure in accordance with the provisions of the method.

Abstract: A method is provided for performing targeted ad insertion in over-the-top delivery of content by detecting ad replacement opportunities in a live content stream and preparing the content for seamless replacement with segmented HTTP adaptive streaming delivery. The method includes provisions for multi-stage proxy-based segment replacement for targeted ad delivery. The method provided works transparently with standard HTTP adaptive streaming clients. A system is also specified for implementing a client and server content delivery infrastructure in accordance with the provisions of the method.

Abstract: Processes are disclosed for economically and effectively removing co-produced oxygenated organic compound from an anaerobic, aqueous fermentation broth used for the bioconversion of syngas to product oxygenated organic compound. The processes involve subjecting a portion of the aqueous fermentation broth after recovery of the product oxygenated organic compound to anaerobic organic bioconversion, and recycling the broth for use in the bioconversion of syngas.

Abstract: Processes for starting up and operating anaerobic, deep tank fermentation reactors including a process for anaerobic bioconversion of a gas substrate comprising carbon monoxide, hydrogen, and carbon dioxide in a reactor by contact of the gas substrate with an aqueous menstruum containing microorganisms suitable for converting the gas substrate to an oxygenated organic compound in the reactor. The process further includes: blanketing the reactor above the aqueous menstruum to the essential exclusion of oxygen with a head space gas comprising at least one of carbon monoxide, hydrogen, carbon dioxide, nitrogen, and a lower alkane; continuously supplying a feed gas comprising at least a portion of the gas substrate to the aqueous menstruum in the reactor; and injecting the gas substrate and a motive liquid into the reactor to form a dispersion of the motive liquid and microbubbles, the microbubbles having a diameter of less than about 500 microns.

Abstract: A method and system is provided for controlling bandwidth rate limiting and client rendering rate limiting in a video delivery network. The method provides network service providers with a means for overriding video delivery data rates selected through dynamic client bitrate adaptation, as well as video data rendering rates of the clients, to limit the impact of network congestion. A system is also specified for implementing a client and a proxy computer in accordance with the method. The system works transparently with standard HTTP-based video delivery systems and includes an HTTP proxy cache infrastructure to support bandwidth rate limiting and client rending rate limiting. The system further provides for administrative overrides of client bitrate selection and client bandwidth usage.

Abstract: A method and system is provided for controlling bandwidth rate limiting and client rendering rate limiting in a video delivery network. The method provides network service providers with a means for overriding video delivery data rates selected through dynamic client bitrate adaptation, as well as video data rendering rates of the clients, to limit the impact of network congestion. A system is also specified for implementing a client and a proxy computer in accordance with the method. The system works transparently with standard HTTP-based video delivery systems and includes an HTTP proxy cache infrastructure to support bandwidth rate limiting and client rending rate limiting. The system further provides for administrative overrides of client bitrate selection and client bandwidth usage.