Boost Your PC Performance with System Mechanic: The Science Behind It
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any problems found, plus a list of recommended fixes.
PC Hints and Tips
- Registry cleaner myths
- Computer repair
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- Computer speed up
- Registry repair
- Slow computer
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Acoustic Comfort in Buildings: Noise Sources & Control
Acoustic Intensity
By definition, there is a difference of 1 Bel between two currents if the relationship is 10. When compared with a reference intensity, the number of dB for each intensity level defines its intensity on a scale where the zero level (0 dB) corresponds to the intensity of reference. This is taken as corresponding to the average threshold of perception at 1000 Hz.
Sound
The magnitude of the sensation of sound depends on the acoustic wave intensity and frequency. Increased sensitivity
Read MoreEnvironmental Protection and Management Act (EPMA) Cheat Sheet
EPMA
1a. Duty of Occupier
General (EPMA Sec 2): Occupier must take reasonably practicable measures to ensure safety, considering the conditions, circumstances, technical knowledge, provision/maintenance/proper use of plant, and supervision of any process/operation.
Land and Drain (EPMA Sec 15): Occupier must obtain a license from the Director-General (DG) to discharge trade effluent, oil, chemicals, sewage, or other polluting matters into any drain or land. Failure to do so may result in liability.
Read MoreUnderstanding DC Motors: Principles, Types, and Applications
Principle of Operation (Generator)
The principle of operation of a generator can be explained by basic electrical theory. Rotating a wire ring within a magnetic field induces an electrical current in the wire.
Establishment of a Dynamo
A dynamo consists of several key components:
- Magnetic circuit (fixed and mobile)
- Electrical circuit (inductor, induced, collector, brushes)
Circuit Magnet
The circuit magnet is typically of the salient pole type and is made of mild steel sheets 0.8 to 1.5 mm thick. Ancillary
Read MoreEnergy Fundamentals: Forms, Transformations, and Efficiency
Chapter 1: Energy Basics
What is Energy?
Energy is the capacity to do work. It can be converted from one form to another, but it cannot be created or destroyed. Energy is a property of matter that can be converted into work, heat, or radiation.
Forms of Energy
Several forms of energy exist, including:
- Kinetic Energy: Energy possessed by a body due to its motion (e.g., a flying airplane).
- Potential Energy: Energy that a body possesses by virtue of its physical position (e.g., water stored behind a dam)
Print Culture and the Modern World
Print Culture & the Modern World
The First Printed Books
The earliest print technology was developed in China, Japan, and Korea. From 594 AD onwards, books were printed in China by rubbing paper against the inked surface of woodblocks. The traditional Chinese ‘Accordion Book’ was folded and stitched at the side because both sides of the thin, porous sheet could not be printed. For a very long time, the imperial state of China was the major producer of printed material. The Chinese bureaucratic
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