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Beacon Light English Model Secondary School
A beacon is an intentionally conspicuous device designed to attract attention to a specific location. A common example is the lighthouse, which draws attention to a fixed point that can be used to navigate around obstacles or into port. More modern examples include a variety of radio beacons that can be read on radio direction finders in all weather, and radar transponders that appear on radar displays. Beacons can also be combined with semaphoric or other indicators to provide important information, such as the status of an airport, by the colour and rotational pattern of its airport beacon, or of pending weather as indicated on a weather beacon mounted at the top of a tall building or similar site. When used in such fashion, beacons can be considered a form of optical telegraphy. For navigation Beacons help guide navigators to their destinations. Types of navigational beacons include radar reflectors, radio beacons, sonic and visual signals. Visual beacons range from s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodetic Datum
A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame) is a global datum reference or reference frame for unambiguously representing the position of locations on Earth by means of either geodetic coordinates (and related vertical coordinates) or geocentric coordinates. DatumsThe plural is not "data" in this case are crucial to any technology or technique based on spatial location, including geodesy, navigation, surveying, geographic information systems, remote sensing, and cartography. A horizontal datum is used to measure a horizontal position, across the Earth's surface, in latitude and longitude or another related coordinate system. A ''vertical datum'' is used to measure the elevation or depth relative to a standard origin, such as mean sea level (MSL). A three-dimensional datum enables the expression of both horizontal and vertical position components in a unified form. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lefkada
Lefkada (, ''Lefkáda'', ), also known as Lefkas or Leukas (Ancient Greek and Katharevousa: Λευκάς, ''Leukás'', modern pronunciation ''Lefkás'') and Leucadia, is a Greece, Greek list of islands of Greece, island in the Ionian Sea on the west coast of Greece, connected to the mainland by a long causeway and Pontoon bridge, floating bridge. The principal town of the island and seat of the municipality is Lefkada (city), Lefkada. It is situated on the northern part of the island, approximately 25 minutes by automobile away from Aktion National Airport. The island is part of the Lefkada (regional unit), regional unit of Lefkada. Geography Lefkada measures from north to south, and from east to west. The area of the island is about , the area of the municipality (including the islands Kalamos (island), Kalamos, Kastos and several smaller islets) is . Its highest point is the mountain Stavrota, at above mean sea level, above sea level, situated in the middle of the island. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corcyra
Corfu ( , ) or Kerkyra (, ) is a Greece, Greek island in the Ionian Sea, of the Ionian Islands; including its Greek islands, small satellite islands, it forms the margin of Greece's northwestern frontier. The island is part of the Corfu (regional unit), Corfu regional unit, and is administered by three municipalities with the islands of Othonoi, Ereikoussa, and Mathraki. The principal city of the island (pop. 32,095) is also named Corfu (city), Corfu. Corfu is home to the Ionian University. The island is bound up with the history of Greece from the beginnings of Greek mythology, and is marked by numerous battles and conquests. Ancient Korkyra (polis), Korkyra took part in the Battle of Sybota which was a catalyst for the Peloponnesian War, and, according to Thucydides, the largest naval battle between Greek city states until that time. Thucydides also reports that Korkyra was one of the three great naval powers of Greece in the fifth century BCE, along with Classical Athens, At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peloponnese
The Peloponnese ( ), Peloponnesus ( ; , ) or Morea (; ) is a peninsula and geographic region in Southern Greece, and the southernmost region of the Balkans. It is connected to the central part of the country by the Isthmus of Corinth land bridge which separates the Gulf of Corinth from the Saronic Gulf. From the late Middle Ages until the 19th century, the peninsula was known as the Morea, a name still in colloquial use in its demotic form. The peninsula is divided among three administrative regions: most belongs to the Peloponnese region, with smaller parts belonging to the West Greece and Attica regions. Geography The Peloponnese is a peninsula located at the southern tip of the mainland, in area, and constitutes the southernmost part of mainland Greece. It is connected to the mainland by the Isthmus of Corinth, where the Corinth Canal was constructed in 1893. However, it is also connected to the mainland by several bridges across the canal, including two submers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peloponnesian War
The Second Peloponnesian War (431–404 BC), often called simply the Peloponnesian War (), was an Ancient Greece, ancient Greek war fought between Classical Athens, Athens and Sparta and their respective allies for the hegemony of the Ancient Greece, Greek world. The war remained undecided until the later intervention of the Achaemenid Empire, Persian Empire in support of Sparta. Led by Lysander, the Spartan fleet (built with Persian subsidies) finally defeated Athens which began a period of Spartan hegemony over Greece. Historians have traditionally divided the war into three phases. The first phase (431–421 BC) was named the Ten Years War, or the Archidamian War, after the Spartan king Archidamus II, who invaded Attica several times with the full hoplite army of the Peloponnesian League, the alliance network dominated by Sparta (then known as Lacedaemon). The Long Walls of Athens rendered this strategy ineffective, while the superior navy of the Delian League (Athens' all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thucydides
Thucydides ( ; ; BC) was an Classical Athens, Athenian historian and general. His ''History of the Peloponnesian War'' recounts Peloponnesian War, the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been dubbed the father of "scientific history" by those who accept his claims to have applied strict standards of impartiality and evidence-gathering and analysis of cause and effect, without reference to intervention by the Ancient Greek religion, gods, as outlined in his introduction to his work. Thucydides has been called the father of the school of political realism, which views the political behavior of individuals and the subsequent outcomes of relations between states as ultimately mediated by, and constructed upon, fear and self-interest. His text is still studied at universities and military colleges worldwide. The Melian dialogue is regarded as a seminal text of international relations theory, while his version of Pericles's Funeral O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marquess Of Shen (King Ping's Grandfather)
The Marquis of Shen (Chinese: ; pinyin: ''Shēnhóu''; d. 771 BCE) was a Qiang ruler of the ancient Chinese state of Shen (also known as "West Shen", not to be confused with another Shen state near modern-day Nanyang, Henan Province also known as "South Shen") during ancient China's Zhou dynasty. An important vassal state responsible for guarding the western Guanzhong region against Xirong incursions, the Shen state roughly covered the area of modern-day Mei County in Shanxi Province. One of the Marquis of Shen's daughters was married to King You as his queen, and gave birth to Crown Prince Yijiu, but another consort named Bao Si gained the favor of the king, who wanted to depose Queen Shen and Crown Prince Yijiu in favor of Bao Si's son Bofu. Furious, the Marquis of Shen allied with the Zeng state and the Quanrong barbarians to attack the Zhou capital Haojing in 771 BCE. King You was defeated and killed at the foot of Mount Li (near modern-day Xi'an), and the capit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
King You Of Zhou
King You of Zhou (795–771 BC), personal name Ji Gongsheng, was a king of the Chinese Zhou dynasty and the last from the Western Zhou dynasty. He reigned from 781 to 771 BC. History In 780 BC, a major earthquake struck Guanzhong. A soothsayer named Bo Yangfu () considered this an omen foretelling the destruction of the Zhou Dynasty. In 779 BC, a concubine named Bao Si entered the palace and came into the King You's favour. They had a son named Bofu. King You deposed and Crown Prince Yijiu. He made Bao Si the new queen and Bofu the new crown prince. Queen Shen's father, the Marquess of Shen, was furious at the deposition of his daughter and grandson Crown Prince Yijiu and mounted an attack on King You's palace with the Quanrong. King You called for his nobles using the previously abused beacons but none came. In the end, King You and Bofu were killed and Bao Si was captured. After King You died, nobles including the Marquess of Shen, the Marquess of Zeng () and supporte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Wall
The Great Wall of China (, literally "ten thousand Li (unit), ''li'' long wall") is a series of fortifications in China. They were built across the historical northern borders of ancient Chinese states and Imperial China as protection against Eurasian nomads, various nomadic groups from the Eurasian Steppe. The first walls date to the 7th century BC; these were joined together in the Qin dynasty. Successive dynasties expanded the wall system; the best-known sections were built by the Ming dynasty (1368–1644). To aid in defense, the Great Wall utilized watchtowers, troop barracks, garrison stations, signaling capabilities through the means of smoke or fire, and its status as a transportation corridor. Other purposes of the Great Wall have included border controls (allowing control of immigration and emigration, and the imposition of duties on goods transported along the Silk Road), and the regulation of trade. The collective fortifications constituting the Great Wall stret ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phryctoriae
Phryctoria () was a semaphore system used in Ancient Greece. The ''phryctoriae'' were towers built on selected mountaintops so that one tower (''phryctoria'') would be visible to the next tower (usually 20 miles away). The towers were used for the transmission of a specific prearranged message. One tower would light its flame, the next tower would see the fire, and light its own. In Aeschylus tragedy ''Agamemnon'', a slave watchman character learns the news of Troy's fall from Mycenae by carefully watching a fire beacon. Thucydides wrote that during the Peloponnesian War, the Peloponnesians who were in Corcyra were informed by night-time beacon signals of the approach of sixty Athenian vessels from Lefkada. When Cnemus attacked Salamis Island, the Salaminians informed the Athenians and asked for help by beacon-fires. Phryctoriae and Pyrseia Ιn the 2nd century BC, the Greek engineers from Alexandria, Cleoxenes () and Democletus () invented the ''pyrseia'' (). Πυρσεία f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
