摘要:
A system and method for simultaneously receiving first and second ensembles. The first ensemble includes a first signal from a first satellite, a first signal from a second satellite and a first signal from a terrestrial repeater. Likewise, the second ensemble includes a second signal from the first satellite, a second signal from the second satellite and a second signal from the terrestrial repeater. The inventive receiver further includes a mechanism for selectively outputting signals transmitted within the first and second ensembles. In the illustrative embodiment, the first signal from the second satellite is identical to the first signal from the first satellite. Similarly, the first signal from the terrestrial repeater is identical to the first signal from the first satellite.
摘要:
Methods of forming a permeable cement composition in a well bore adjacent to a fluid producing zone therein and cement compositions for forming permeable cement sand screens in well bores are provided. A cement composition of the invention is comprised of a hydraulic cement, a particulate cross-linked aqueous gel having a size in the range of from about 100 microns to about 3000 microns containing an internal temperature activated breaker, a particulate dehydrated cross-linked aqueous gel having a size in the range,of from about 40 microns to about 500 microns containing an internal temperature activated breaker and water present in an amount sufficient to form a slurry.
摘要:
Two playing pieces each include a body portion, a shield having at least two hinged segments attached to the body portion, a first control mechanism operable to select one of the hinged segments as a blocked segment, a projecting element attached to the body portion and having a raised position and at least two lowered positions, and a second control mechanism operable to select one of the lowered positions as an active position. The two playing pieces can be placed on a track structure at opposite respective ends for movement towards each other along respective paths of movement. In one possible outcome, the projecting element of one of the playing pieces strikes the blocked segment of the shield of the other playing piece and in another outcome the projecting element strikes an unblocked segment of the shield of the other playing piece.
摘要:
Selected amino acid hydroxyethylamino sulfonamide compounds are effective as retroviral protease inhibitors, and in particular as inhibitors of HIV protease. The present invention relates to such retroviral protease inhibitors and, more particularly, relates to selected novel compounds, composition and method for inhibiting retroviral proteases, such as human immunodeficiency virus (HIV) protease, prophylactically inhibiting retroviral infection or the spread of a retrovirus, and treatment of a retroviral infection.
摘要:
In a time division, multiple access system, a base station (102) transmits an isochronous beacon (404, 422) at the start of each frame (400), conveying control and timing information. Following the isochronous beacon (404), isochronous time slots (414, 416, 418, 420) are dynamically allocated for communication of isochronous data. After communication of the isochronous data, the remainder of the frame (400) before the next isochronous beacon (422) is used for transmission of packets of asynchronous data. This technique gives priority to the isochronous data, which is real time, while also maximizing the bandwidth allocated for asynchronous data. A single transmitter circuit (124, 158) and receiver circuit (122, 156) at each station are used for communication of both isochronous data and asynchronous data.
摘要:
Described herein is a retroviral protease inhibiting compound of the formula: ##STR1## or a pharmaceutically acceptable salt, prodrug or ester thereof.
摘要:
A data processor (20) which flexibly encrypts data within different address ranges includes an encryption determination circuit (50) to monitor an address conducted on an internal address bus (22) and when the address is within certain predefined ranges, perform encryption or decryption of address and/or data. For example the encryption determination circuit (50) may be used to selectively enable a data encryption-decryption circuit (60). When the data encryption-decryption circuit (60) is disabled, data conducted on an internal data bus (23) becomes "cleartext", i.e., non-encrypted. In one embodiment, the data encryption-decryption is performed in partial dependence on the address itself, and the address conducted to the external address bus is itself selectively encrypted as well.
摘要:
A surgical suture retainer retains the suture in an epitrochoidal, or hourglass configuration. One embodiment includes an insert member mounted to one of several foldable connected panels of the suture retainer. The insert member preferably has first and second wings which fold over to form a suture retaining pocket. The suture is held in a looped configuration having an hourglass shape. Another embodiment employs tabs cut from one of the panels to retain the suture in the hourglass shape. Yet another embodiment employs a cover sheet bonded to a base panel, wherein bonding areas are located to maintain the suture loop in an hourglass shape.