|
Engineering Concepts
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering. The term ''engineering'' is derived from the Latin ''ingenium'', meaning "cleverness" and ''ingeniare'', meaning "to contrive, devise". Definition The American Engineers' Council for Professional Development (ECPD, the predecessor of ABET) has defined "engineering" as: The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simple Machines
A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Usually the term refers to the six classical simple machines that were defined by Renaissance scientists: * Lever * Wheel and axle * Pulley * Inclined plane * Wedge * Screw A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load. The ratio of the output to the applied force is called the ''mechanical advantage''. Simple machines can be regarded as the elementary "building blocks" of which all more complicated machines (sometimes called "compound machines") are composed. For example, wheels, lever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seven Wonders Of The Ancient World
The Seven Wonders of the Ancient World, also known as the Seven Wonders of the World or simply the Seven Wonders, is a list of seven notable structures present during classical antiquity. The first known list of seven wonders dates back to the 2nd–1st century BC. While the entries have varied over the centuries, the seven traditional wonders are the Great Pyramid of Giza, the Colossus of Rhodes, the Lighthouse of Alexandria, the Mausoleum at Halicarnassus, the Temple of Artemis, the Statue of Zeus at Olympia, and the Hanging Gardens of Babylon. Using modern-day countries, two of the wonders were located in Greece, two in Turkey, two in Egypt, and one in Iraq. Of the seven wonders, only the Pyramid of Giza, which is also by far the oldest of the wonders, still remains standing, with the others being destroyed over the centuries. There is scholarly debate over the exact nature of the Hanging Gardens, and there is doubt as to whether they existed at all. Background Alexander the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pharos Of Alexandria
The Lighthouse of Alexandria, sometimes called the Pharos of Alexandria (; Ancient Greek: ὁ Φάρος τῆς Ἀλεξανδρείας, contemporary Koine ), was a lighthouse built by the Ptolemaic Kingdom of Ancient Egypt, during the reign of Ptolemy II Philadelphus (280–247 BC). It has been estimated to have been at least in overall height. One of the Seven Wonders of the Ancient World, for many centuries it was one of the tallest man-made structures in the world. The lighthouse was severely damaged by three earthquakes between 956 and 1323 AD and became an abandoned ruin. It was the third-longest surviving ancient wonder (after the Mausoleum at Halicarnassus and the extant Great Pyramid of Giza), surviving in part until 1480, when the last of its remnant stones were used to build the Citadel of Qaitbay on the site. In 1994, a team of French archaeologists dove into the water of Alexandria's Eastern Harbour and discovered some remains of the lighthouse on the se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanging Gardens Of Babylon
The Hanging Gardens of Babylon were one of the Seven Wonders of the Ancient World listed by Hellenic culture. They were described as a remarkable feat of engineering with an ascending series of tiered gardens containing a wide variety of trees, shrubs, and vines, resembling a large green mountain constructed of mud bricks. It was said to have been built in the ancient city of Babylon, near present-day Hillah, Babil province, in Iraq. The Hanging Gardens' name is derived from the Greek word (, ), which has a broader meaning than the modern English word "hanging" and refers to trees being planted on a raised structure such as a terrace. According to one legend, the Hanging Gardens were built alongside a grand palace known as ''The Marvel of Mankind'', by the Neo-Babylonian King Nebuchadnezzar II (who ruled between 605 and 562 BC), for his Median wife, Queen Amytis, because she missed the green hills and valleys of her homeland. This was attested to by the Babylonian pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thanjavur
Thanjavur (), also Tanjore, Pletcher 2010, p. 195 is a city in the Indian state of Tamil Nadu. Thanjavur is the 11th biggest city in Tamil Nadu. Thanjavur is an important center of South Indian religion, art, and architecture. Most of the Great Living Chola Temples, which are UNESCO World Heritage Monuments, are located in and around Thanjavur. The foremost among these, the Brihadeeswara Temple, is located in the centre of the city. Thanjavur is also home to Tanjore painting, a painting style unique to the region. Thanjavur is the headquarters of the Thanjavur District. The city is an important agricultural centre located in the Kaveri Delta and is known as the ''Rice bowl of Tamil Nadu''. Thanjavur is administered by a municipal corporation covering an area of and had a population of 290,720 in 2011. Roadways are the major means of transportation, while the city also has rail connectivity. The nearest airport is Tiruchirapalli International Airport, located away fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brihadeeswarar Temple
Brihadishvara Temple, called Rajarajesvaram () by its builder, and known locally as ''Thanjai Periya Kovil'' ("Thanjavur Big Temple") and ''Peruvudaiyar Kovil'', is a Shaivite Hindu temple built in a Chola architectural style located on the south bank of the Cauvery river in Thanjavur, Tamil Nadu, India.Thanjavur Encyclopaedia Britannica It is one of the largest Hindu temples and an exemplar of Tamil architecture. It is also called ''Dakshina Meru'' (" Meru of the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teotihuacán
Teotihuacan ( Spanish: ''Teotihuacán'') (; ) is an ancient Mesoamerican city located in a sub-valley of the Valley of Mexico, which is located in the State of Mexico, northeast of modern-day Mexico City. Teotihuacan is known today as the site of many of the most architecturally significant Mesoamerican pyramids built in the pre-Columbian Americas, namely Pyramid of the Sun and Pyramid of the Moon. At its zenith, perhaps in the first half of the first millennium (1 CE to 500 CE), Teotihuacan was the largest city in the Americas, with a population estimated at 125,000 or more, making it at least the sixth-largest city in the world during its epoch. The city covered eight square miles (21 km2), and 80 to 90 percent of the total population of the valley resided in Teotihuacan. Apart from the pyramids, Teotihuacan is also anthropologically significant for its complex, multi-family residential compounds, the Avenue of the Dead, and its vibrant, well-preserved mura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Via Appia
The Appian Way (Latin and Italian: ''Via Appia'') is one of the earliest and strategically most important Roman roads of the ancient republic. It connected Rome to Brindisi, in southeast Italy. Its importance is indicated by its common name, recorded by Statius, of ("the Appian Way, the queen of the long roads"). The road is named after Appius Claudius Caecus, the Roman censor who began and completed the first section as a military road to the south in 312 BC"Appian Way" in '' Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 1, p. 490. during the Samnite Wars. Origins The need for roads The Appian Way was a Roman road used as a main route for military supplies for its conquest of southern Italy in 312 BC and for improvements in communication. The Appian Way was the first long road built specifically to transport troops outside the smaller region of greater Rome (this was essential to the Romans). The few roads outside the early city were Etruscan and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roman Aqueduct
The Romans constructed aqueducts throughout their Republic and later Empire, to bring water from outside sources into cities and towns. Aqueduct water supplied public baths, latrines, fountains, and private households; it also supported mining operations, milling, farms, and gardens. Aqueducts moved water through gravity alone, along a slight overall downward gradient within conduits of stone, brick, concrete or lead; the steeper the gradient, the faster the flow. Most conduits were buried beneath the ground and followed the contours of the terrain; obstructing peaks were circumvented or, less often, tunneled through. Where valleys or lowlands intervened, the conduit was carried on bridgework, or its contents fed into high-pressure lead, ceramic, or stone pipes and siphoned across. Most aqueduct systems included sedimentation tanks, which helped to reduce any water-borne debris. Sluices, ''castella aquae'' (distribution tanks) and stopcocks regulated the supply to individ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parthenon
The Parthenon (; grc, Παρθενών, , ; ell, Παρθενώνας, , ) is a former temple on the Athenian Acropolis, Greece, that was dedicated to the goddess Athena during the fifth century BC. Its decorative sculptures are considered some of the high points of Greek art, an enduring symbol of Ancient Greece, democracy and Western civilization. The Parthenon was built in thanksgiving for the Hellenic victory over Persian invaders during the Greco-Persian Wars. Like most Greek temples, the Parthenon also served as the city treasury. Construction started in 447 BC when the Delian League was at the peak of its power. It was completed in 438; work on the decoration continued until 432. For a time, it served as the treasury of the Delian League, which later became the Athenian Empire. In the final decade of the 6th century AD, the Parthenon was converted into a Christian church dedicated to the Virgin Mary. After the Ottoman conquest in the mid-fifteenth cent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
