摘要:
An apparatus and method for etching a point on the surface of a magnetic medium to reduce the reflectivity of the point and for verifying that proper etching occurred. A light source provides a collimated incident beam of light. The incident beam is focused to a point on the medium and a portion of the beam is reflected. The reflected beam is separated from the incident beam and the intensity of the reflected beam is measured. The measured intensity is compared to a threshold value and verification is indicated if the measured intensity exceeds the threshold value.
摘要:
The current invention substantially removes particulate waste materials or debris from the floptical medium after laser etching. A low-temperature gas containing ice crystals is applied at a predetermined angle while the floptical medium is being rotated to improve the cleaning effect. The temperature of the disk is maintained above freezing to maintain the cleaning effect.
摘要:
The current invention provides an apparatus and method of collecting waste materials produced during laser etching of a floptical medium without blocking access to the medium surface. The invention also improves collection efficiency by applying a uniform low-pressure air around the outer edge of the medium. Because the air pressure is applied around the edge, there is no necessity to coordinate a movement or timing of the current invention with respect to the laser etching unit.
摘要:
An apparatus for etching optical servo tracks on a magnetic storage disk comprises optics for generating a beam of light for etching the servo tracks and a spindle for rotating the disk in proximity to the optics. The device further comprises a center pin at the center of rotation of the spindle and an alignment pin which is off-center of the spindle. A disk to be etched is placed on the spindle with the center pin through a center hole in the disk hub. A pressurized gas nozzle directs bursts of pressurized gas toward the edge of the disk to rotate the disk until an alignment hole in the disk hub engages the alignment pin.
摘要:
A method and system for executing a plurality of threads are described. The method may include mapping a thread specified priority value associated with a dormant thread to a thread quantized priority value associated with the dormant thread if the dormant thread becomes ready to run. The method may further include adding the dormant thread to a ready to run queue and updating the thread quantized priority value. A thread quantum value associated with the dormant thread may also be updated, or a combination of the quantum value and quantized priority value may be both updated.
摘要:
Methods, systems and devices configured to add synchronization to the entry and exit from low power modes in asynchronous operating systems on a multiprocessor system. A synchronizing agent tracks the requested sleep and wake up times of the different asynchronous operating systems executing on different cores of the same system on chip or multicore processor. The sleep/wake up times of some cores/operating systems may be delayed in order to synchronize the sleep/wake up times of two or more of the asynchronous operating systems executing on the multiprocessor system.
摘要:
Systems and methods are provided for remotely a monitoring an individual's ability to carry out a various exercise activities and to evaluate the individual's range of motion. The individual can stand or sit in the field of view of the camera and carry out a set of base line activities. The baseline activities can be stored for subsequent retrieval and analysis. Based on the results of that evaluation, other activities can be prescribed for the individual to systematically carry out. The results of the subsequent activities can be evaluated and compared to the result of the base line activities to determine how the activities should be revised or whether other treatments are required or appropriate.
摘要:
The oxidation resistance of a superalloy casting such as an equiaxed, directionally solidified, or single crystal casting, is improved by melting, pouring, or casting the alloy so as to react with a magnesium or calcium-bearing ceramic material. Magnesium or calcium is introduced into the alloy through a controlled reaction between the alloy and the magnesium or calcium-bearing ceramic material.