An unmanned aerial vehicle (UAV), commonly known as a drone, as an unmanned aircraft system (UAS), or by several other names, is an aircraft without a human pilot aboard. The flight of UAVs may operate with various degrees of autonomy: either under remote control by a human operator, or fully or intermittently autonomously, by onboard computers. Compared to manned aircraft, …
Continue ReadingMarine biology is the scientific study of organisms in the ocean or other marine bodies of water. Given that in biology many phyla, families and genera have some species that live in the sea and others that live on land, marine biology classifies species based on the environment rather than on taxonomy. Marine biology differs from marine ecology as marine …
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The origin of the word “travel” is most likely lost to history. The term “travel” may originate from the Old French word travail. According to the Merriam Webster dictionary, the first known use of the word travel was in the 14th century. In English we still occasionally use the words travail and travails, which mean struggle. According to Simon Winchester …
Continue ReadingA tablet computer, commonly shortened to tablet, is a thin, flat mobile computer with a touchscreen display, which in 2016 is usually color, processing circuitry, and a rechargeable battery in a single device. Tablets often come equipped with sensors, including digital cameras, a microphone, and an accelerometer. The touchscreen display uses the recognition of finger or stylus gestures to replace …
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