摘要:
Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.
摘要:
Methods of producing a nanostructure in a target film are provided. The method includes selectively irradiating at least one focusing element of a near-field focusing array that is in near-field focusing relationship with a target film in a manner sufficient to produce a nanostructure from the target film. Also provided are systems for practicing methods of the invention, as well as objects produced thereby.
摘要:
A method for producing active glass nanoparticles that exhibit upconversion is described. The method employs pulsed-laser ablation of an active glass substrate using, for example, a high repetition rate ultra-short pulse duration laser under normal atmospheric conditions or in a liquid environment.
摘要:
Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.
摘要:
The separation device of the invention is directed to a container having an interior surface defining a channel. The container further has an inlet and an outlet. On the interior surface of the channel are pole tips which may be in a sawtooth configuration having sharp angles facing the interior of the channel that generate a high gradient magnetic field in the channel. Within the channel may be incorporated separating material. The separating material eliminates the direct contact of cells with the magnetic pole material. The separating material, as well as the sawtooth pole tips also serves the purpose of creating a field gradient across the entire container to avoid the problem of zero field gradient in the center of the container where the velocity is greatest, and where more cells flow. The separating material is designed to cause a substantially unobstructed flow of medium through the channel so that unlabeled substances are not trapped in the separating material.
摘要:
Provided are laser induced breakdown spectroscopy (LIBS) devices. Embodiments of the devices are configured to obtain a spatial resolution of 10 μm or less. Also provided are methods of using the subject LIBS devices to determine whether one or more elements of interest are present in a target sample. The devices and methods find use in a variety of applications, e.g., submicron and nanoscale chemical analysis applications.
摘要:
A method for patterning crystalline indium tin oxide (ITO) using femtosecond laser is disclosed, which comprises steps of: (a) providing a substrate with an amorphous ITO layer thereon; (b) transferring the amorphous ITO layer in a predetermined area into a crystalline ITO layer by emitting a femtosecond laser beam to the amorphous ITO layer in the predetermined area; and (c) removing the amorphous ITO layer on the substrate using an etching solution.
摘要:
Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.
摘要:
A method for producing active glass nanoparticles that exhibit upconversion is described. The method employs pulsed-laser ablation of an active glass substrate using, for example, a high repetition rate ultra-short pulse duration laser under normal atmospheric conditions or in a liquid environment.
摘要:
Methods of producing a nanostructure in a target film are provided. The method includes selectively irradiating at least one focusing element of a near-field focusing array that is in near-field focusing relationship with a target film in a manner sufficient to produce a nanostructure from the target film. Also provided are systems for practicing methods of the invention, as well as objects produced thereby.