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Amwoga Khalwale What Is Amplitude Modulation (AM)? The first amplitude modulated signal was transmitted in 1901 by a Canadian engineer by the name Reginald Fessenden. He used a continuous spark transmission and placed a carbon microphone in the antenna lead. This transmission was very crude; signals were audible over a distance of a few hundred meters. The … Read more
In 1857, John Walker’s son, Alexander Walker, produced the first blended scotch whisky bottled under the family name — Walker’s Old Highland. From the time the brand launched the color-coded, tilted label on square bottle packaging with the recognizable ‘striding man’ logo we’ve all come to recognize. This blend has morphed into today’s Red, blue, … Read more
A feedback system is one in which the output signal is sampled and then fed back to the input to form an error signal that drives the system. Feedback systems are very useful and widely used in amplifier circuits, oscillators, process control systems as well as other types of electronic systems. Whereas there are many … Read more
PCM (Pulse-Code Modulation) Pulse code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals and each sample … Read more
What Is Whiskey? Whiskey or Whisky is a type of distilled alcoholic beverage made from fermented grain mash. Various grains are used for different varieties, including barley, corn, rye and wheat. It is believed that whiskey has origins with the Greeks as far back as the third century, when spirits were distilled to make … Read more
Often used interchangeably or confused due to their aquatic associations, sirens and mermaids are different mythological entities with unique characteristics and symbolism. Get to learn about Sirens and Mermaids in the context of their origins, appearances, behaviors and their impact on literature, art and popular culture. Remember that interpretations of these mythological creatures can be … Read more
What Are Stationary Waves? Stationary wave also referred to as standing wave is a wave which oscillates in time but whose peak amplitude profiles does not move in space. The peak amplitude of the wave oscillations at any point in space is constant with time, and the oscillations at different points throughout the wave are … Read more
What Is A Pure Substance? A pure substance also referred to as a chemical substance is a material that has a constant composition (is homogenous) and has consistent properties throughout the sample. Pure substances have the potential to form predictable products from chemical reactions. In chemistry, a pure substance consists of only one type of … Read more
Polarity can be described as a separation of charge leading to a molecule or its chemical groups having an electric dipole moment with a negatively charged end and a positively charged end. In other words, bond or the molecular polarities depend upon the electro-negativities of the atoms or the molecules. A molecule is basically said … Read more
What Is Inbound Logistics? Inbound logistics refers to the network that brings goods or material to the business. Inbound logistic network includes everything you need to transport, store and deliver goods to your business from the supplier. The actual products that come into your business depend on the nature of your business. Inbound logistics can … Read more