Abstract: Rapid verification of executing processes includes receiving a seed from a verification unit. A checksum is generated at least in part by using a processor. The processor is coupled to a hierarchical memory, the hierarchical memory comprising an instruction cache, a data cache, and a shared memory accessible by both the instruction cache and the data cache. The shared memory is configured to store an executing program. A size of at least one of the instruction cache and the data cache is insufficient to store the entire executing program. The checksum is transmitted to the verification unit.

Abstract: Tiered advertisement bidding is disclosed. One or more quality metrics associated with a user profile are determined. An advertisement bid is selected from a plurality of tiered bids based at least in part on the determined quality metrics. Determining the quality metrics can include determining a conversion assessment. Determining the quality metric can also include determining whether a need associated with a user profile has been met for a category. In some cases, persona detection is performed with respect to the user profile.

Abstract: Disclosed herein are systems, methods, and storage media for distributed system security. In an example embodiment, a computer-executable method includes receiving a first item of executable code, calculating a hash of the first item of executable code, and comparing the calculated hash to a database of hashes. Responsive to a determination that the calculated hash does not match any hash in the database of hashes, a first security policy is applied to the first item of executable code. Triggering of the first policy indicates that the first item of executable code should be blocked from execution. If the first item of executable code does not trigger the first security policy, the method includes executing the first item of executable code and intercepting a request initiated by the first item of executable code during execution. In the request matches a second security policy, the request is blocked and/or filtered or sanitized, based on attribute-based access control policies.

Abstract: Disclosed herein are systems, methods, and storage media for distributed system security. In an example embodiment, a computer-executable method includes receiving a first item of executable code, calculating a hash of the first item of executable code, and comparing the calculated hash to a database of hashes. Responsive to a determination that the calculated hash does not match any hash in the database of hashes, a first security policy is applied to the first item of executable code. Triggering of the first policy indicates that the first item of executable code should be blocked from execution. If the first item of executable code does not trigger the first security policy, the method includes executing the first item of executable code and intercepting a request initiated by the first item of executable code during execution. In the request matches a second security policy, the request is blocked and/or filtered or sanitized, based on attribute-based access control policies.

Abstract: Disclosed herein are systems, methods, and storage media for distributed system security. In an example embodiment, a computer-executable method includes receiving a first item of executable code, calculating a hash of the first item of executable code, and comparing the calculated hash to a database of hashes. Responsive to a determination that the calculated hash does not match any hash in the database of hashes, a first security policy is applied to the first item of executable code. Triggering of the first policy indicates that the first item of executable code should be blocked from execution. If the first item of executable code does not trigger the first security policy, the method includes executing the first item of executable code and intercepting a request initiated by the first item of executable code during execution. In the request matches a second security policy, the request is blocked and/or filtered or sanitized, based on attribute-based access control policies.

Abstract: A muon detector system capable of determining muon direction and flight trajectory or path is disclosed. The muon detector system includes scintillators for determining muon direction, and an array of muon detectors arranged in orthogonal layers for determining flight trajectory. The system can be used for tomographic and telescopic mode imaging, and may be used for imaging concealed and/or subterranean objects.

Abstract: A muon detector system capable of determining muon direction and flight trajectory or path is disclosed. The muon detector system includes scintillators for determining muon direction, and an array of muon detectors arranged in orthogonal layers for determining flight trajectory. The system can be used for tomographic and telescopic mode imaging, and may be used for imaging concealed and/or subterranean objects.

Abstract: A method and apparatus for detecting and recording an event is disclosed which includes a scintillator located to receive energy from the event. The energy may be x-ray energy from a radiographic source. A mirror is optionally angularly located adjacent the scintillator to redirect or reflect the light into two or more lenses. The two or more lenses have zoom capability to adjust the size of the image and the two or more lenses are arranged as telecentric lenses. A camera receives the light presented from the two or more lenses on an image plane to establish a recorded image while a shutter is presented to selectively control presentation of the light to the camera. The zoom lens allows use of different size scintillators and various CCD cameras to benefit from multiple zoom positions to best capture the image generated by the scintillator.

Abstract: A probe including reflector is disclosed to measure the velocity distribution of a moving surface along many lines of sight. Laser light, directed to the surface by the probe and then reflected back from the surface, is Doppler shifted by the moving surface, collected into probe, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to one or more lens groups and a reflector, such as a parabolic reflector having a mirrored interior surface.

Abstract: A probe including reflector is disclosed to measure the velocity distribution of a moving surface along many lines of sight. Laser light, directed to the surface by the probe and then reflected back from the surface, is Doppler shifted by the moving surface, collected into probe, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to one or more lens groups and a reflector, such as a parabolic reflector having a mirrored interior surface.

Abstract: A photocathode designs that leverage the grazing incidence geometry yield improvements through the introduction of recessed structures, such as cones, pyramids, pillars or cavities to the photocathode substrate surface. Improvements in yield of up to 20 times have been shown to occur in grazing incidence geometry disclosed herein due to a larger path length of the X-ray photons which better matches the secondary electron escape depth within the photocathode material. A photocathode includes a substrate having a first side and a second side, the first side configured to receive x-ray energy and the second side opposing the first side. A structured surface is associated with the second side of the substrate such that the structured surface includes a plurality of recesses from the second side of the substrate into the substrate.

Abstract: A system for transmitting a wireless countermeasure signal to disrupt third party communications is disclosed that include an antenna configured to receive wireless signals and transmit wireless counter measure signals such that the wireless countermeasure signals are responsive to the received wireless signals. A receiver processes the received wireless signals to create processed received signal data while a spectrum control module subtracts known source signal data from the processed received signal data to generate unknown source signal data. The unknown source signal data is based on unknown wireless signals, such as enemy signals. A transmitter is configured to process the unknown source signal data to create countermeasure signals and transmit a wireless countermeasure signal over the first antenna or a second antenna to thereby interfere with the unknown wireless signals.

Abstract: A method and apparatus for the capture of a high number of quasi-continuous effective frames of 2-D data from an event at very short time scales (from less than 10?12 to more than 10?8 seconds) is disclosed which allows for short recording windows and effective number of frames. Active illumination, from a chirped laser pulse directed to the event creates a reflection where wavelength is dependent upon time and spatial position is utilized to encode temporal phenomena onto wavelength. A hyperchromatic lens system receives the reflection and maps wavelength onto axial position. An image capture device, such as holography or plenoptic imaging device, captures the resultant focal stack from the hyperchromatic lens system in both spatial (imaging) and longitudinal (temporal) axes. The hyperchromatic lens system incorporates a combination of diffractive and refractive components to maximally separate focal position as a function of wavelength.

Abstract: An autofocus system includes an imaging device, a lens system and a focus control actuator that is configured to change a focus position of the imaging device in relation to a stage. The electronic control unit is configured to control the focus control actuator to a plurality of predetermined focus positions, and activate the imaging device to obtain an image at predetermined positions and then apply a spatial filter to the obtained images. This generates a filtered image for the obtained images. The control unit determines a focus score for the filtered images such that the focus score corresponds to a degree of focus in the obtained images. The control unit identifies a best focus position by comparing the focus score of the filtered images, and controls the focus control actuator to the best focus position corresponding to the highest focus score.

Abstract: A system for transmitting a wireless countermeasure signal to disrupt third party communications is disclosed that include an antenna configured to receive wireless signals and transmit wireless counter measure signals such that the wireless countermeasure signals are responsive to the received wireless signals. A receiver processes the received wireless signals to create processed received signal data while a spectrum control module subtracts known source signal data from the processed received signal data to generate unknown source signal data. The unknown source signal data is based on unknown wireless signals, such as enemy signals. A transmitter is configured to process the unknown source signal data to create countermeasure signals and transmit a wireless countermeasure signal over the first antenna or a second antenna to thereby interfere with the unknown wireless signals.

Abstract: Systems and methods for sanitizing physical storage in cloud computing and virtual environments. When logical storage is decommissioned in a virtual environment, the underlying physical storage is logically disassociated. However, the underlying physical data blocks remain intact until they are overwritten. Since there is no control over when, or even if, the physical data is ever overwritten, the remaining data is susceptible to compromise. The present disclosure provides a secure erase application that securely erases physical storage associated with to-be deleted resources, such as virtual data stores, virtual images, snapshots and raw virtual disks.

Abstract: A probe including a multiple lens array is disclosed to measure velocity distribution of a moving surface along many lines of sight. Laser light, directed to the moving surface is reflected back from the surface and is Doppler shifted, collected into the array, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to the multiple lens array. Numerous fibers in a fiber array project numerous rays to establish many measurement points at numerous different locations. One or more lens groups may be replaced with imaging lenses so a stereo image of the moving surface can be recorded. Imaging a portion of the surface during initial travel can determine whether the surface is breaking up.

Abstract: A probe including a multiple lens array is disclosed to measure velocity distribution of a moving surface along many lines of sight. Laser light, directed to the moving surface is reflected back from the surface and is Doppler shifted, collected into the array, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to the multiple lens array. Numerous fibers in a fiber array project numerous rays to establish many measurement points at numerous different locations. One or more lens groups may be replaced with imaging lenses so a stereo image of the moving surface can be recorded. Imaging a portion of the surface during initial travel can determine whether the surface is breaking up.

Abstract: This disclosure is directed to a method and apparatus for generating marker and comb indicia in an optical environment using a Mach-Zehnder (M-Z) modulator. High speed recording devices are configured to record image or other data defining a high speed event. To calibrate and establish time reference, the markers or combs are indicia which serve as timing pulses (markers) or a constant-frequency train of optical pulses (comb) to be imaged on a streak camera for accurate time based calibration and time reference. The system includes a camera, an optic signal generator which provides an optic signal to an M-Z modulator and biasing and modulation signal generators configured to provide input to the M-Z modulator. An optical reference signal is provided to the M-Z modulator. The M-Z modulator modulates the reference signal to a higher frequency optical signal which is output through a fiber coupled link to the streak camera.

Abstract: A probe including a multiple lens array is disclosed to measure velocity distribution of a moving surface along many lines of sight. Laser light, directed to the moving surface is reflected back from the surface and is Doppler shifted, collected into the array, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to the multiple lens array. Numerous fibers in a fiber array project numerous rays to establish many measurement points at numerous different locations. One or more lens groups may be replaced with imaging lenses so a stereo image of the moving surface can be recorded. Imaging a portion of the surface during initial travel can determine whether the surface is breaking up.