نتایج جستجو برای: magnetic storage
تعداد نتایج: 517745 فیلتر نتایج به سال:
Flash memory has been gaining more popularity as a substitution for magnetic disk. However, due to asymmetric IO latency, cache management policy needs to be reconsidered in systems equipped with flash. A novel buffer replacement approach named ACAR, which stands for Adaptive Cost Aware cache Replacement, is proposed in this paper to address this problem. Taking operation cost into consideratio...
Existing techniques for characterization of longitudinal recording media using remanence measurements are extended to perpendicular media, in particular to Alumite, and correction for demagnetizing fields is taken into account. It is found that these techniques have limited value because of the sensitivity of the analysis to the correction factor used. Measurement of the recoil lines is investi...
Dyadic Green functions for time–harmonic fields in a homogeneous, isotropic, dielectric– magnetic medium, moving with constant velocity, are derived by first implementing a simple transformation and then using the dyadic Green functions available for uniaxial dielectric–magnetic mediums.
Information loss due to thermal activation is a major concern in ultrahigh-density magnetic recording media. The usually considered mechanism is thermally activated magnetization reversal over micromagnetic energy barriers. However, micromagnetic approaches ignore local anisotropy fluctuations, which translate into a time-dependent reduction of the remanent magnetization. The effect is negligib...
This is a slightly altered portion of an expert report I wrote recently, released with permission, that I thought might serve as an example of how to go about seeking the truth and presenting the state of the science when truly definitive statements based on first principles are not available. Of course, I look forward to the readership proving me wrong with real-world examples, but somehow, I ...
Signalspace Detection (SSD) is a promising concept for symbol detection, especially on magnetic recording channels. We introduce a concept of adaptive SSD, that is characterized by a high detection performance and robustness against parameter variation.
The Iranian Light Source Facility (ILSF) project is the first large scale accelerator facility which is currently under planning in Iran. On the basis of the present design, circumference of the 3 GeV storage ring is 528 m. Beam current and natural beam emittance are 400 mA and 0.477 nm.rad, respectively. Some prototype accelerator components such as high power solid state radio frequency ampli...
The recently developed domain-integrated field equations approach to static magnetic field computation is applied to some two-dimensional configurations, viz. a model rotor/stator slot configuration and a model magnetic recording head configuration. Consistently linear edge expansion functions are used for the magnetic field strength, together with consistently linear face expansion functions f...
Tertiary storage is becoming increasingly important for many organizations involved in large-scale data analysis and data mining activities. Yet database management systems (DBMS) and other data-intensive systems do not incorporate tertiary storage as a rst-class citizen in the storage hierarchy. For instance, the typical solution for bringing tertiary-resident data under the control of a DBMS ...
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