Abstract: A method, a data processing system, and a computer program product identify blockages in a heat sink of a data processing system. An electromagnetic emitter and an electromagnetic detector are positioned on opposite sides of the heat sink. An intensity of a stream of electromagnetic radiation directed from the electromagnetic emitter is measured by the electromagnetic detector. Based on the measured intensity of the stream of electromagnetic radiation as measured by the electromagnetic detector, a blockage level of the heat sink is determined. If the blockage level of the heat sink exceeds a blockage threshold, an alert is generated.

Abstract: This invention provides an optical device comprising a large group of non-uniform resonators operating cumulatively as a ‘super-ring’ to provide a controllable group delay with large bandwidth. The super-ring tuning is performed by a single control. The device may include two super-rings, each includes a large number of resonators with a resonant frequencies centered around ?1 and ?2 respectively. The invention provides multiple ways to improve the delay duration, bandwidth and the tuning speed, and overcomes the issue of non-uniformity of resonance frequency for devices incorporating multiple optical resonators.

Abstract: This invention provides a balanced thermal approach to the tuning of an optical time delay device in order to eliminate any long-term time response of the device performance due to thermal time constants of the device, its mount, packaging or electronic temperature control circuits. The invention provides multiple ways to improve the thermal tuning speed of the balanced thermal approach. Additionally, the invention overcomes an issue of microresonator non-uniformity by operating a large group of microresonators as a ‘super-ring’ by tuning the large group together to provide a controllable group delay with large bandwidth.

Abstract: A variable displacement oil pump comprising a pump body, which oil pump is driven by a driven input shaft, a slide having an internal surface, the slide disposed in the pump body, the slide pivotally moveable by pressurization of a first chamber and second chamber, a rotor disposed for rotation within the slide, a plurality of vanes, each moveably disposed in a radial slot in the rotor, each radial slot in fluid communication with a vane fluid reservoir, wherein first and second pump body portions are disposed on the opposite sides of the slide and the rotor to hold each therebetween thus causing the volume defined by a pair of adjacent vanes to change to perform an oil suction and discharge, wherein the pump body portions comprise a suction region where a pump chamber undergoes a suction stroke, wherein the pump body portions comprise a discharge region where each pump chamber undergoes a discharge stroke and in which a fluid conduit is connected, the pump body portions each comprising a groove, each groove

Abstract: This invention provides an optical device comprising a large group of non-uniform resonators operating cumulatively as a ‘super-ring’ to provide a controllable group delay with large bandwidth. The super-ring tuning is performed by a single control. The device may include two super-rings, each includes a large number of resonators with a resonant frequencies centered around ?1 and ?2 respectively. The invention provides multiple ways to improve the delay duration, bandwidth and the tuning speed, and overcomes the issue of non-uniformity of resonance frequency for devices incorporating multiple optical resonators.

Abstract: A method and apparatus is provided for tracking a thermally floating wavelength signal channel grid generated at an optical transmitter (Tx) in an optical transmission system or optical network where the wavelengths of the individual Tx signal channels may move in wavelength due to, for example, changes in ambient temperature at the optical transmitter but the channel spacing between Tx signal channels along the thermally floating Tx wavelength grid remains constant.

Abstract: This invention provides a balanced thermal approach to the tuning of an optical time delay device in order to eliminate any long-term time response of the device performance due to thermal time constants of the device, its mount, packaging or electronic temperature control circuits. The invention provides multiple ways to improve the thermal tuning speed of the balanced thermal approach. Additionally, the invention overcomes an issue of microresonator non-uniformity by operating a large group of microresonators as a ‘super-ring’ by tuning the large group together to provide a controllable group delay with large bandwidth.

Abstract: A circuit is attached in parallel to a universal serial bus interface of a data processing system. A capacitor in the circuit is charged by receiving power from a power pin of the universal serial bus interface while the data processing system is not in a reduced power state. A vibration sensor is unpowered while the data processing system is not in a reduced power state. The vibration sensor is disconnected from a data pin of the universal serial bus interface while the data processing system is not in a reduced power state. When the data processing system enters a reduced power state, the capacitor provides power to the vibration sensor. When a vibration is detected by the vibration sensor, a switch connects the vibration sensor to the data pin of the universal serial bus interface, providing a wake up signal to the data processing system.

Abstract: A computer implemented method and computer program product for detecting and communicating boot failures in a client device. A Dynamic Host Control Protocol server is configured to monitor Dynamic Host Control Protocol communications from one or more client devices, wherein the client devices are configured to boot from local media. A boot request is received from a client device in response to a failure of the client device to boot from the local media. Responsive to receiving the boot request, a determination is made that a boot failure has occurred on the client device.

Abstract: Systems and methods are disclosed for tracking items in a shopping cart using radio frequency identification. In one embodiment, a first set of items is positioned in a first item zone alongside an aisle. An electronic tag reader is capable of remotely reading identification tags on the items into an electronic record of shopping cart contents when the identification tags are within a readable range from the electronic tag reader. An energy field generator such as an electromagnetic field generator generates a first electromagnetic field extending from a location within the readable range of at least some of the items in the first item zone to a location outside the readable range of any of the items in the first item zone.

Abstract: This invention provides a tunable delay of an optical signal having multiple frequency components. The delay comprises at least a first and a second integrated resonators coupled sequentially to a waveguide; the resonators have angular resonant frequencies ?1=?0??? and ?2=?0+?? respectively, ?0 is a median frequency of an input optical signal and ?? is a tunable deviation from the median frequency. The device is providing a nearly equal true time delay to all frequency components in the output signal.

Abstract: A method, a data processing system, and a computer program product identify blockages in a heat sink of a data processing system. An electromagnetic emitter and an electromagnetic detector are positioned on opposite sides of the heat sink. An intensity of a stream of electromagnetic radiation directed from the electromagnetic emitter is measured by the electromagnetic detector. Based on the measured intensity of the stream of electromagnetic radiation as measured by the electromagnetic detector, a blockage level of the heat sink is determined. If the blockage level of the heat sink exceeds a blockage threshold, an alert is generated.

Abstract: This invention provides a tunable delay of an optical signal having a carrier with an angular frequency ?0 and a single side band having a signal band with a median angular frequency ?r. The delay line comprises at least a first, a second and a third integrated resonators coupled sequentially to a waveguide. The first and the second resonators have angular resonant frequencies ?1=?r??? and ?2=?r+?? respectively, where ?? is a deviation from the median frequency. The third resonator provides a phase delay difference between the phase at the optical carrier ?0 and the phase at the median frequency ?r equal to (?r??0)Td, where Td is the time delay. The device provides an equal group delay to all frequency components in the output signal and also equal phase delay for all frequency components of an RF signal when the optical signal is downconverted at a photodetector. The device may find applications controlling the time delay to antenna elements in a phased array system.

Abstract: A circuit is attached in parallel to a universal serial bus interface of a data processing system. A capacitor in the circuit is charged by receiving power from a power pin of the universal serial bus interface while the data processing system is not in a reduced power state. A vibration sensor is unpowered while the data processing system is not in a reduced power state. The vibration sensor is disconnected from a data pin of the universal serial bus interface while the data processing system is not in a reduced power state. When the data processing system enters a reduced power state, the capacitor provides power to the vibration sensor. When a vibration is detected by the vibration sensor, a switch connects the vibration sensor to the data pin of the universal serial bus interface, providing a wake up signal to the data processing system.

Abstract: Systems and methods are disclosed for tracking items in a shopping cart using radio frequency identification. In one embodiment, a first set of items is positioned in a first item zone alongside an aisle. An electronic tag reader is capable of remotely reading identification tags on the items into an electronic record of shopping cart contents when the identification tags are within a readable range from the electronic tag reader. An energy field generator such as an electromagnetic field generator generates a first electromagnetic field extending from a location within the readable range of at least some of the items in the first item zone to a location outside the readable range of any of the items in the first item zone.

Abstract: This invention provides a tunable delay of an optical signal having multiple frequency components. The delay comprises at least a first and a second integrated resonators coupled sequentially to a waveguide; the resonators have angular resonant frequencies ?1=?0??? and ?2=?0+?? respectively, ?0 is a median frequency of an input optical signal and ?? is a tunable deviation from the median frequency. The device is providing a nearly equal true time delay to all frequency components in the output signal.

Abstract: A catalyst loading system comprising: a vessel comprising at least one gas distribution nozzle at or near the bottom of the vessel, a top fluid distributor located at or near the top of the vessel, a catalyst inlet through which catalyst is introduced into the vessel, a first contact point at which catalyst introduced into the vessel first contacts the contents of the vessel, and a discharge outlet whereby catalyst exits the vessel. Methods of preparing catalyst slurry for introduction into a downstream reactor or in-situ activation within the vessel utilizing the catalyst loading system are also disclosed.

Abstract: This invention provides a tunable delay of an optical signal having a carrier with an angular frequency ?0 and a single side band having a signal band with a median angular frequency ?r. The delay line comprises at least a first, a second and a third integrated resonators coupled sequentially to a waveguide. The first and the second resonators have angular resonant frequencies ?1=?r?? and ?2=?r+?? respectively, where ?? is a deviation from the median frequency. The third resonator provides a phase delay difference between the phase at the optical carrier ?0 and the phase at the median frequency (Or equal to (?r??0)Td, where Td is the time delay. The device provides an equal group delay to all frequency components in the output signal and also equal phase delay for all frequency components of an RF signal when the optical signal is downconverted at a photodetector. The device may find applications controlling the time delay to antenna elements in a phased array system.

Abstract: A computer implemented method for managing power usage in a data processing system. Power usage by a set of input/output devices attached to the data processing system is monitored. If it is determined that the power usage requires a change in power consumption by a processing unit, the clock speed of the processing unit is changed to change the power consumption by the processing unit.

Abstract: A computer implemented method and computer program product for detecting and communicating boot failures in a client device. A Dynamic Host Control Protocol server is configured to monitor Dynamic Host Control Protocol communications from one or more client devices, wherein the client devices are configured to boot from local media. A boot request is received from a client device in response to a failure of the client device to boot from the local media. Responsive to receiving the boot request, a determination is made that a boot failure has occurred on the client device.