Abstract: This disclosure relates generally to inhibitors of MHC-I downmodulation, and methods of treating or preventing an HIV infection by administering the inhibitors to a patient in need of treatment thereof.

Abstract: Systems and methods for managing data in compliance with privacy, security and/or retention standards in business industries. A dynamic and customizable archival and retrieval system allows for information and documentation to be placed and made available in the system. The document type and identifying information for that document type are described. Definitions are established for the documents being managed, the data identifying the documents, and the retention policies for the documents. The documents are associated with the identifying data for a particular set of records. A single point of entry is provided for external and/or internal requests, and/or a single point of exit is provided for transmissions of information, wherein the transmissions to requestors include information that is individually approved. Moreover, digital authorizations and consents for retrieval from external data sources may be utilized.

Abstract: An automotive disc brake (10) with an improved caliper assembly (14) to prevent drag of the inner brake pad (78) on the inner braking surface (40) of the rotor (16) in a hydraulically actuated automotive disc brake assembly.

Abstract: Phase difference demodulator for measuring the phase difference between two signals of the same frequency, time multiplexed onto a single analog input, and providing a precision digital output signal representing the phase difference. The most significant part of the signal, the upper bits, is determined by digital processes while analog-to-digital processes determines the lower bits. The analog-to-digital processes utilize an integrating capacitor and current sources for demodulating servo bursts for obtaining phase difference. The current sources are a coarse current and a fine current 1/16 in value of the coarse current source. The capacitor is switched in a differential scheme by the integrator to determine error during the digital approximation of the upper bits in analog to digital conversion. The same capacitor and current sources are utilized in the error acquired in analog form and then during the analog-to-digital conversion.

Abstract: An optical tool is disclosed which permits a sequence of aligned transducer gaps to be positioned parallel to the axis of a disk file. The tool is surfaced with transparent material, has a thickness the same as the disk or disks of a disk stack being simulated and presents an etched alignment grid at the interface surface between transducer and tool. The virtually common plane of the transducer gap and etched grid substantially eliminates parallax and the unfilled etched grid permits the gap to be seen, whether aligned with the transparent unetched surface or the translucent etched surface portion. The use of inclined mirrored surfaces underlying the grid permits alignment to be effected using a bright field microscope and observing from a direction rotated 90 degrees from a line perpendicular to the grid to enable alignment of transducer gaps confronting one another at opposite sides of the disk.

Abstract: In parallel track data storage systems, such as disk files, servo information is recorded using a plurality of constant frequency fields each having a phase shift between tracks. Servo information is thus encoded in the phase of the servo pattern instead of the amplitude of the servo signal lobes. Multiple phase shifts per track are used to make the signal constantly varying with transducer head displacement. Phase is measured modulo 360.degree. such that the phase of a given field will go through 360.degree. every M tracks. By using several fields having different values of M, coarse, medium and fine position resolution can be obtained with the same servo pattern and demodulation scheme. Further, using two fields, one field may be split and positioned at either side of the other field to provide a common center for both fields and eliminate error conditions due to factors such as speed variation.

Abstract: A three level motor speed control for a device such as a magnetic disk drive requiring a closely regulated running speed provides for acceleration, deceleration, obtaining close speed regulation and maintaining speed regulation of a rotating device during operation. The first level control provides acceleration or deceleration while checking velocity each eighth revolution and the second level control uses single revolutions to measure speed over an accurate rotational distance to obtain close speed regulation. Both level one and level two are controlled by the device controller. During run conditions with no error signal, a third level of control of the closely regulated velocity is maintained by separate hardware circuits which frees the processor for other uses. An error condition forces control to level one for re-establishment of the regulated running speed and a command to stop the drive forces control to level one for deceleration and stop procedures.

Abstract: A brushless D. C. motor is disclosed having two bifilar winding wire pairs with each bifilar pair forming alternate windings. Each winding is switched by a transistor which has a back poled diode connected in parallel therewith. The control circuit sequences energization of single windings with each winding energized being in a different bifilar pair than the next preceding energized winding whereby when a transistor is switched off the other winding of the bifilar pair and the associated back poled diode protect the transistor and provide an energy conserving/heat eliminating path for the induced current. Each winding is further formed of a pair of subwindings having an angle of separation therebetween approximately half the angular separation between adjacent windings.

Abstract: Thick double heterostructure (Al,Ga)As wafers comprising layers of gallium arsenide and gallium aluminum arsenide on a metallized n-GaAs substrate are separated into individual devices for use as diode lasers. In contrast to prior art techniques employed with thinner wafers of mechanically cleaving the wafer in mutually orthogonal directions, the wafer is first separated into bars of diodes by a process which comprises (a) forming channels of substantially parallel sidewalls about 1 to 4 mils deep into the surface of the n-GaAs substrate (b) etching into the n-GaAs substrate with an anisotropic etchant to a depth sufficient to form V-grooves in the bottom of the channels and (c) mechanically cleaving into bars of diodes. The cleaving may be done by prior art techniques using a knife, razor blade or tweezer edge or by attaching the side of the wafer opposite to the V-grooves to a flexible adhesive tape and rolling the assembly in a manner such as over a tool of small radius.