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Muscle Contraction01:15

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In skeletal muscles, acetylcholine is released by nerve terminals at the motor endplate—the point of synaptic communication between motor neurons and muscle fibers. The binding of acetylcholine to its receptors on the sarcolemma allows entry of sodium ions into the cell and triggers an action potential in the muscle cell. Thus, electrical signals from the brain are transmitted to the muscle. Subsequently, the enzyme acetylcholinesterase breaks down acetylcholine to prevent excessive...
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Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer.
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Skeletal muscle fibers have the unique ability to switch between rest and contraction states, using different sources of ATP for energy. The contraction cycle and Ca2+ transport back into the sarcoplasmic reticulum for relaxation require significant ATP. However, the ATP reserves in muscle fibers are limited and can only sustain contractions for a few seconds. Additional ATP production becomes necessary for prolonged contractions. As a result, muscle fibers generate ATP through various sources,...
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Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
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Masonry walls are subject to slight expansion and contraction due to variations in temperature and moisture. Thermal movement in masonry is relatively straightforward to measure and plan for. On the other hand, moisture movement poses more of a challenge. New clay masonry units typically absorb water and expand over time under normal environmental conditions. Conversely, new concrete masonry units tend to shrink as they lose the excess moisture acquired during their production process.
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Y-DWMS: A Digital Watermark Management System Based on Smart Contracts.

Bo Zhao1, Liming Fang2,3, Hanyi Zhang1

  • 1College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, NO. 29 Yudao Street, Nanjing 210016, China.

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Summary

This study introduces a YODA-based digital watermark management system (Y-DWMS) that uses blockchain and smart contracts to deter digital rights infringement. The system ensures rational users choose non-infringement, protecting copyright holders from losses.

Keywords:
blockchaindigital rights managementgame theorysmart contract

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Area of Science:

  • Computer Science
  • Information Security
  • Digital Rights Management

Background:

  • Digitalization of media increases risks of copyright infringement.
  • Existing Digital Rights Management (DRM) systems are ineffective against digital rights violations and loss recovery.
  • Low data replication costs exacerbate digital rights issues.

Purpose of the Study:

  • To present a novel YODA-based digital watermark management system (Y-DWMS).
  • To implement a robust DRM mechanism using blockchain and smart contracts.
  • To deter digital rights infringement and enable loss recovery for copyright holders.

Main Methods:

  • Development of a YODA-based digital watermark management system (Y-DWMS).
  • Integration of non-repudiation features of smart contracts and blockchain technology.
  • Application of game analysis to model user behavior and system effectiveness.

Main Results:

  • The Y-DWMS effectively deters digital rights infringement.
  • Rational users are incentivized towards non-infringement decisions within the Y-DWMS.
  • The system provides a mechanism for recovering losses suffered by copyright holders.

Conclusions:

  • The Y-DWMS offers a fundamental solution to digital rights infringement, surpassing current DRM schemes.
  • Blockchain and smart contracts provide a non-repudiable framework for digital rights management.
  • The proposed system significantly increases the cost of infringement and ensures loss recovery.