Digital Library Fundamentals: Definition, Components, and Standards

Digital Library Definition

A Digital Library is a collection of digital objects such as text, images, audio, and video, stored electronically and accessible via the internet or computer networks. It provides organized, searchable, and shareable access to information resources anytime and anywhere.

Needs and Characteristics of Digital Libraries

Key Needs of Digital Libraries

  • Easy and remote access to information
  • Preservation of rare and fragile documents
  • Efficient resource sharing among institutions
  • Support
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Chemistry and Physics Fundamentals: Units, Atoms, Equations

Key Topics in Chemistry and Physics Fundamentals

Chapter 1: Physical Quantities and Measurement Systems

Defining Physical Quantities

A physical quantity is a measure of fundamental properties such as mass, length, time, and temperature.

Common Measurement Systems

  • MKS System: Mass (kilograms, kg), Length (meters, m), Time (seconds, s), Temperature (Kelvin, K)
  • CGS System: Mass (grams, g), Length (centimeters, cm), Time (seconds, s), Temperature (Kelvin, K)

Metric Prefixes and Powers of Ten

PrefixSymbolValuePower
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