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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
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Related Experiment Video

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Characterizing Multiscale Mechanical Properties of Brain Tissue Using Atomic Force Microscopy, Impact Indentation, and Rheometry
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Repair Rates for Multiple Descriptions on Distributed Storage.

Anders Høst-Madsen1, Heecheol Yang2, Minchul Kim3

  • 1Department of Electrical Engineering, University of Hawaii Manoa, Honolulu, HI 96822, USA.

Entropy (Basel, Switzerland)
|May 28, 2022
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Summary

This study introduces a new approach to distributed storage, enhancing data quality with more server access. It addresses server repair in multiple description coding, minimizing distortion and optimizing repair rates.

Keywords:
distributed storagelossy source codingmultiple description codingrate-distortionrepair

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Area of Science:

  • Information Theory
  • Distributed Systems
  • Data Storage

Background:

  • Traditional distributed storage offers perfect restoration but lacks content-dependent quality.
  • Multiple description coding allows for lossy reconstruction with quality varying by the number of received descriptions.

Purpose of the Study:

  • To investigate the repair problem in lossy multiple description coding for distributed storage systems.
  • To determine the extra bits required for server repair while maintaining original distortion levels.

Main Methods:

  • Developed a novel coding scheme for multiple description problems with repair.
  • Analyzed the achievable rate for repair in such systems.
  • Proved optimality in specific scenarios.

Main Results:

  • An achievable repair rate was identified for lossy multiple description coding.
  • The study demonstrates that existing multiple description codes are suboptimal for repair.
  • Designing codes with repair in mind is crucial for efficiency.

Conclusions:

  • Repair in lossy distributed storage requires specialized multiple description codes.
  • Using existing codes without considering repair leads to higher repair rates.
  • Optimized repair strategies are essential for maintaining system performance and quality.