Understanding RAM, Hard Disks, and Computer Performance
RAM Technology: DRAM vs. SRAM
RAM technology is divided into two main types:
- Dynamic RAM (DRAM)
- Static RAM (SRAM)
DRAM
- Made with cells that store data as a charge on capacitors.
- The presence or absence of charge in a capacitor is interpreted as a binary 1 or 0.
- Requires periodic charge refreshing to maintain data storage.
- The term *dynamic* refers to the tendency of the stored charge to leak away, even with power continuously applied.
DRAM vs. SRAM: Key Differences
Both DRAM and SRAM are volatile, meaning
Read MoreUnderstanding Communication: Types, Process, and Business
The Nature of Communication
Communication is fundamental to the evolution of human societies, enabling the exchange of information and interaction. It’s a process where two or more people connect to transmit and share information.
Types of Communication
Verbal Communication
Verbal communication involves transmitting messages through words, either:
- Oral: Using spoken words.
- Written: Using written words.
Nonverbal Communication
Nonverbal communication includes all messages transmitted without spoken words,
Read MoreGTO Thyristors, Power MOSFETs, and IGBTs: Features and Uses
GTO (Gate Turn-Off Thyristor)
- Conventional thyristors (CTs) are nearly ideal switches for use in power electronic applications.
- These can be easily turned on by a positive gate current.
Once in the on state, the gate loses control.
- CTs can now be turned off by expensive and bulky commutation circuitry.
- This shortcoming of thyristors limits their use up to about 1KHz applications.
- These drawbacks in thyristors have led to the development of GTOs.
- GTO is a more versatile power semiconductor device.
- Like a
Computer Science Fundamentals and Grammar
Computer Science Fundamentals
Video Frames
- What are the three individual frames in a video called? (Write also the full words for each frame!)
- Keyframe (Intra-coded frame)
- Intra frame (Intra-coded frame)
- Predicted frame (Predicted frame)
Network and Transport Layers
- Into what units is data subdivided by the network layer and by the transport layer?
- Network layer: Packets
- Transport layer: Segments
Checksum
- What is the name for mathematical calculations based on the contents of data?
- Checksum
Audio Formats
- What
Understanding Telecommunications: From Wireline to GPS
Wireline and Wireless Communication
Wireline: Requires a physical medium for sending information.
Wireless communication: Does not require a physical medium.
When to Use Interference-Shielded Cables
Interference-shielded cables are used repeatedly when there is a need to minimize external interference.
Cost Comparison
Cable systems are generally more expensive than wireless systems.
Ubiquity of Wireless Systems
The great advantage of wireless systems is their ubiquity.
Telephone Operation
- When speaking, emitted
Understanding Computer Basics: Units, Software, and OS
Units of Measurement in Computing
The nature of information is analog, meaning signals are continuous in time. In contrast, information on computers is represented by digits, the language of computers. In everyday life, we express information using a given language and a decimal number system. Computer circuitry recognizes two types of digital electrical signals: the presence of a signal, equivalent to 1, and the absence of a signal, 0. This language of 1s and 0s is called the binary digital system.
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