1.
Istanbul
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Istanbul, historically known as Constantinople and Byzantium, is the most populous city in Turkey and the countrys economic, cultural, and historic center. Istanbul is a city in Eurasia, straddling the Bosphorus strait between the Sea of Marmara and the Black Sea. Its commercial and historical center lies on the European side and about a third of its population lives on the Asian side, the city is the administrative center of the Istanbul Metropolitan Municipality, both hosting a population of around 14.7 million residents. Istanbul is one of the worlds most populous cities and ranks as the worlds 7th-largest city proper, founded under the name of Byzantion on the Sarayburnu promontory around 660 BCE, the city developed to become one of the most significant in history. After its reestablishment as Constantinople in 330 CE, it served as a capital for almost 16 centuries, during the Roman and Byzantine, the Latin. Overlooked for the new capital Ankara during the period, the city has since regained much of its prominence. The population of the city has increased tenfold since the 1950s, as migrants from across Anatolia have moved in, arts, music, film, and cultural festivals were established at the end of the 20th century and continue to be hosted by the city today. Infrastructure improvements have produced a complex transportation network, considered a global city, Istanbul has one of the fastest-growing metropolitan economies in the world. It hosts the headquarters of many Turkish companies and media outlets and accounts for more than a quarter of the gross domestic product. Hoping to capitalize on its revitalization and rapid expansion, Istanbul has bid for the Summer Olympics five times in twenty years, the first known name of the city is Byzantium, the name given to it at its foundation by Megarean colonists around 660 BCE. The name is thought to be derived from a personal name, ancient Greek tradition refers to a legendary king of that name as the leader of the Greek colonists. Modern scholars have hypothesized that the name of Byzas was of local Thracian or Illyrian origin. He also attempted to promote the name Nova Roma and its Greek version Νέα Ῥώμη Nea Romē, the use of Constantinople to refer to the city during the Ottoman period is now considered politically incorrect, even if not historically inaccurate, by Turks. By the 19th century, the city had acquired other names used by foreigners or Turks. Europeans used Constantinople to refer to the whole of the city, pera was used to describe the area between the Golden Horn and the Bosphorus, but Turks also used the name Beyoğlu. The name İstanbul is commonly held to derive from the Medieval Greek phrase εἰς τὴν Πόλιν and this reflected its status as the only major city in the vicinity. The importance of Constantinople in the Ottoman world was reflected by its Ottoman name Der Saadet meaning the gate to Prosperity in Ottoman. An alternative view is that the name evolved directly from the name Constantinople, with the first, a Turkish folk etymology traces the name to Islam bol plenty of Islam because the city was called Islambol or Islambul as the capital of the Islamic Ottoman Empire
2.
Europe
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Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, yet the non-oceanic borders of Europe—a concept dating back to classical antiquity—are arbitrary. Europe covers about 10,180,000 square kilometres, or 2% of the Earths surface, politically, Europe is divided into about fifty sovereign states of which the Russian Federation is the largest and most populous, spanning 39% of the continent and comprising 15% of its population. Europe had a population of about 740 million as of 2015. Further from the sea, seasonal differences are more noticeable than close to the coast, Europe, in particular ancient Greece, was the birthplace of Western civilization. The fall of the Western Roman Empire, during the period, marked the end of ancient history. Renaissance humanism, exploration, art, and science led to the modern era, from the Age of Discovery onwards, Europe played a predominant role in global affairs. Between the 16th and 20th centuries, European powers controlled at times the Americas, most of Africa, Oceania. The Industrial Revolution, which began in Great Britain at the end of the 18th century, gave rise to economic, cultural, and social change in Western Europe. During the Cold War, Europe was divided along the Iron Curtain between NATO in the west and the Warsaw Pact in the east, until the revolutions of 1989 and fall of the Berlin Wall. In 1955, the Council of Europe was formed following a speech by Sir Winston Churchill and it includes all states except for Belarus, Kazakhstan and Vatican City. Further European integration by some states led to the formation of the European Union, the EU originated in Western Europe but has been expanding eastward since the fall of the Soviet Union in 1991. The European Anthem is Ode to Joy and states celebrate peace, in classical Greek mythology, Europa is the name of either a Phoenician princess or of a queen of Crete. The name contains the elements εὐρύς, wide, broad and ὤψ eye, broad has been an epithet of Earth herself in the reconstructed Proto-Indo-European religion and the poetry devoted to it. For the second part also the divine attributes of grey-eyed Athena or ox-eyed Hera. The same naming motive according to cartographic convention appears in Greek Ανατολή, Martin Litchfield West stated that phonologically, the match between Europas name and any form of the Semitic word is very poor. Next to these there is also a Proto-Indo-European root *h1regʷos, meaning darkness. Most major world languages use words derived from Eurṓpē or Europa to refer to the continent, in some Turkic languages the originally Persian name Frangistan is used casually in referring to much of Europe, besides official names such as Avrupa or Evropa
3.
Asia
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Asia covers an area of 44,579,000 square kilometres, about 30% of Earths total land area and 8. 7% of the Earths total surface area. The continent, which has long been home to the majority of the population, was the site of many of the first civilizations. Asia is notable for not only its large size and population. In general terms, Asia is bounded on the east by the Pacific Ocean, on the south by the Indian Ocean, the western boundary with Europe is a historical and cultural construct, as there is no clear physical and geographical separation between them. The most commonly accepted boundaries place Asia to the east of the Suez Canal, the Ural River, and the Ural Mountains, and south of the Caucasus Mountains, China and India alternated in being the largest economies in the world from 1 to 1800 A. D. The accidental discovery of America by Columbus in search for India demonstrates this deep fascination, the Silk Road became the main East-West trading route in the Asian hitherland while the Straits of Malacca stood as a major sea route. Asia has exhibited economic dynamism as well as robust population growth during the 20th century, given its size and diversity, the concept of Asia—a name dating back to classical antiquity—may actually have more to do with human geography than physical geography. Asia varies greatly across and within its regions with regard to ethnic groups, cultures, environments, economics, historical ties, the boundary between Asia and Africa is the Red Sea, the Gulf of Suez, and the Suez Canal. This makes Egypt a transcontinental country, with the Sinai peninsula in Asia, the border between Asia and Europe was historically defined by European academics. In Sweden, five years after Peters death, in 1730 Philip Johan von Strahlenberg published a new atlas proposing the Urals as the border of Asia, the Russians were enthusiastic about the concept, which allowed them to keep their European identity in geography. Tatishchev announced that he had proposed the idea to von Strahlenberg, the latter had suggested the Emba River as the lower boundary. Over the next century various proposals were made until the Ural River prevailed in the mid-19th century, the border had been moved perforce from the Black Sea to the Caspian Sea into which the Ural River projects. The border between the Black Sea and the Caspian is usually placed along the crest of the Caucasus Mountains, the border between Asia and the loosely defined region of Oceania is usually placed somewhere in the Malay Archipelago. The terms Southeast Asia and Oceania, devised in the 19th century, have had several different geographic meanings since their inception. The chief factor in determining which islands of the Malay Archipelago are Asian has been the location of the possessions of the various empires there. Lewis and Wigen assert, The narrowing of Southeast Asia to its present boundaries was thus a gradual process, Asia is larger and more culturally diverse than Europe. It does not exactly correspond to the borders of its various types of constituents. From the time of Herodotus a minority of geographers have rejected the three-continent system on the grounds there is no or is no substantial physical separation between them
4.
Bosphorus
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The Bosphorus or Bosporus is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey. It forms part of the boundary between Europe and Asia, and separates Asian Turkey from European Turkey. The worlds narrowest strait used for navigation, the Bosphorus connects the Black Sea with the Sea of Marmara, and, by extension via the Dardanelles. Most of the shores of the strait are heavily settled, straddled by the city of Istanbuls metropolitan population of 17 million inhabitants extending inland from both coasts, together with the Dardanelles, the Bosphorus forms the Turkish Straits. This folk etymology was canonized by Aeschylus in Prometheus Bound, where Prometheus prophesies to Io that the strait would be named after her, the site where Io supposedly went ashore was near Chrysopolis, and was named Bous the Cow. The same site was known as Damalis, as it was where the Athenian general Chares had erected a monument to his wife Damalis. Historically, the Bosphorus was also known as the Strait of Constantinople, or the Thracian Bosphorus and these are expressed in Herodotus Histories,4.83, as Bosporus Thracius, Bosporus Thraciae, and Βόσπορος Θρᾴκιος, respectively. Other names by which the strait is referenced by Herodotus include Chalcedonian Bosporus, the term eventually came to be used as common noun βόσπορος, meaning a strait, and was also formerly applied to the Hellespont in Classical Greek by Aeschylus and Sophocles. Presently, the waterway is officially referred to as simply Bosphorus, the Marmara further connects to the Aegean and Mediterranean Seas via the Dardanelles. A common mistake made by those who are unfamiliar with the locale is to assume the Bosphorus is a river, when it is, in fact. The exact scientific cause and date of the formation of the Bosphorus remain the subject of debate among geologists, many geologists, however, claim that the strait is much older, even if relatively young on a geologic timescale. The Symplegades were defeated when the lyrical hero Jason obtained successful passage, whereupon the rocks became fixed, between these limits, the strait is 31 km long, with a width of 3,329 m at the northern entrance and 2,826 m at the southern entrance. Its maximum width is 3,420 m between Umuryeri and Büyükdere Limanı, and minimum width 700 m between Kandilli Point and Aşiyan, the depth of the Bosphorus varies from 13 to 110 m in midstream with an average of 65 m. The deepest location is between Kandilli and Bebek with 110 m, the most shallow locations are off Kadıköy İnciburnu on the northward route with 18 m and off Aşiyan Point on the southward route with 13 m. The study of the water and wind erosion of the straits relates to that of its formation, sections of the shore have been reinforced with concrete or rubble and sections of the strait prone to deposition are periodically dredged. These channels are the main pathway for sediments to the deep sea where they form sedimentary deposits. These deposits ultimately hold not only untapped reserves of gas and oil and our initial findings show that the flow in these channels is quite different to the flow in river channels on land. Specifically, as flow moves around a bend it spirals in the direction in the deep sea compared to the spiral found in river channels on land
5.
Suspension bridge
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A suspension bridge is a type of bridge in which the deck is hung below suspension cables on vertical suspenders. The first modern examples of type of bridge were built in the early 19th century. Simple suspension bridges, which lack vertical suspenders, have a history in many mountainous parts of the world. This type of bridge has cables suspended between towers, plus vertical suspender cables carry the weight of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc upward for additional clearance, like other suspension bridge types, this type often is constructed without falsework. The suspension cables must be anchored at each end of the bridge, the main cables continue beyond the pillars to deck-level supports, and further continue to connections with anchors in the ground. The roadway is supported by vertical suspender cables or rods, called hangers, in the latter case there will be very little arc in the outboard main cables. The earliest suspension bridges were ropes slung across a chasm, with a deck possibly at the level or hung below the ropes such that the rope had a catenary shape. The Tibetan saint and bridge-builder Thangtong Gyalpo originated the use of chains in his version of simple suspension bridges. In 1433, Gyalpo built eight bridges in eastern Bhutan, the last surviving chain-linked bridge of Gyalpos was the Thangtong Gyalpo Bridge in Duksum en route to Trashi Yangtse, which was finally washed away in 2004. Gyalpos iron chain bridges did not include a deck bridge which is the standard on all modern suspension bridges today. Instead, both the railing and the layer of Gyalpos bridges used wires. The stress points that carried the screed were reinforced by the iron chains, before the use of iron chains it is thought that Gyalpo used ropes from twisted willows or yak skins. He may have also used tightly bound cloth, the first American iron chain suspension bridge was the Jacobs Creek Bridge in Westmoreland County, Pennsylvania, designed by inventor James Finley. Finleys bridge was the first to all of the necessary components of a modern suspension bridge. Finley patented his design in 1808, and published it in the Philadelphia journal, The Port Folio, in 1810. Early British chain bridges included the Dryburgh Abbey Bridge and 137 m Union Bridge, with rapidly increasing to 176 m with the Menai Bridge. The first chain bridge on the European continent was the Chain Bridge in Nuremberg, the Clifton Suspension Bridge is one of the longest of the parabolic arc chain type
6.
Steel
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Steel is an alloy of iron and other elements, primarily carbon, that is widely used in construction and other applications because of its high tensile strength and low cost. Steels base metal is iron, which is able to take on two forms, body centered cubic and face centered cubic, depending on its temperature. It is the interaction of those allotropes with the elements, primarily carbon. In the body-centred cubic arrangement, there is an atom in the centre of each cube. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement of dislocations that otherwise occur in the lattices of iron atoms. The carbon in steel alloys may contribute up to 2. 1% of its weight. Steels strength compared to pure iron is possible at the expense of irons ductility. With the invention of the Bessemer process in the mid-19th century and this was followed by Siemens-Martin process and then Gilchrist-Thomas process that refined the quality of steel. With their introductions, mild steel replaced wrought iron, further refinements in the process, such as basic oxygen steelmaking, largely replaced earlier methods by further lowering the cost of production and increasing the quality of the product. Today, steel is one of the most common materials in the world and it is a major component in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Modern steel is generally identified by various grades defined by assorted standards organizations, the noun steel originates from the Proto-Germanic adjective stakhlijan, which is related to stakhla. The carbon content of steel is between 0. 002% and 2. 1% by weight for plain iron–carbon alloys and these values vary depending on alloying elements such as manganese, chromium, nickel, iron, tungsten, carbon and so on. Basically, steel is an alloy that does not undergo eutectic reaction. In contrast, cast iron does undergo eutectic reaction, too little carbon content leaves iron quite soft, ductile, and weak. Carbon contents higher than those of steel make an alloy, commonly called pig iron, while iron alloyed with carbon is called carbon steel, alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include, manganese, nickel, chromium, molybdenum, boron, titanium, vanadium, tungsten, cobalt, and niobium. Additional elements are important in steel, phosphorus, sulfur, silicon, and traces of oxygen, nitrogen, and copper. Alloys with a higher than 2. 1% carbon content, depending on other element content, cast iron is not malleable even when hot, but it can be formed by casting as it has a lower melting point than steel and good castability properties
7.
Turkey
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Turkey, officially the Republic of Turkey, is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is a democratic, secular, unitary, parliamentary republic with a cultural heritage. The country is encircled by seas on three sides, the Aegean Sea is to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, Ankara is the capital while Istanbul is the countrys largest city and main cultural and commercial centre. Approximately 70-80% of the countrys citizens identify themselves as ethnic Turks, other ethnic groups include legally recognised and unrecognised minorities. Kurds are the largest ethnic minority group, making up approximately 20% of the population, the area of Turkey has been inhabited since the Paleolithic by various ancient Anatolian civilisations, as well as Assyrians, Greeks, Thracians, Phrygians, Urartians and Armenians. After Alexander the Greats conquest, the area was Hellenized, a process continued under the Roman Empire. The Seljuk Sultanate of Rûm ruled Anatolia until the Mongol invasion in 1243, the empire reached the peak of its power in the 16th century, especially during the reign of Suleiman the Magnificent. During the war, the Ottoman government committed genocides against its Armenian, Assyrian, following the war, the conglomeration of territories and peoples that formerly comprised the Ottoman Empire was partitioned into several new states. Turkey is a member of the UN, an early member of NATO. Turkeys growing economy and diplomatic initiatives have led to its recognition as a regional power while her location has given it geopolitical, the name of Turkey is based on the ethnonym Türk. The first recorded use of the term Türk or Türük as an autonym is contained in the Old Turkic inscriptions of the Göktürks of Central Asia, the English name Turkey first appeared in the late 14th century and is derived from Medieval Latin Turchia. Similarly, the medieval Khazar Empire, a Turkic state on the shores of the Black. The medieval Arabs referred to the Mamluk Sultanate as al-Dawla al-Turkiyya, the Ottoman Empire was sometimes referred to as Turkey or the Turkish Empire among its European contemporaries. The Anatolian peninsula, comprising most of modern Turkey, is one of the oldest permanently settled regions in the world, various ancient Anatolian populations have lived in Anatolia, from at least the Neolithic period until the Hellenistic period. Many of these peoples spoke the Anatolian languages, a branch of the larger Indo-European language family, in fact, given the antiquity of the Indo-European Hittite and Luwian languages, some scholars have proposed Anatolia as the hypothetical centre from which the Indo-European languages radiated. The European part of Turkey, called Eastern Thrace, has also been inhabited since at least forty years ago. It is the largest and best-preserved Neolithic site found to date, the settlement of Troy started in the Neolithic Age and continued into the Iron Age
8.
Fatih Sultan Mehmet Bridge
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The Fatih Sultan Mehmet Bridge, also known as the Second Bosphorus Bridge, is a bridge in Istanbul, Turkey spanning the Bosphorus strait. When completed in 1988, it was the 5th-longest suspension bridge span in the world, the bridge is named after the 15th-century Ottoman Sultan Mehmed the Conqueror, who conquered the Byzantine capital, Constantinople, in 1453. It carries the European route E80, Asian Highway 1, Asian Highway 5, there are two other bridges that connect Europe and Asia located in Istanbul which are named Yavuz Sultan Selim Bridge and 15 July Martyrs Bridge (formerly known as Bosphorus Bridge. The bridge is situated between Hisarüstü and Kavacık and it is a gravity-anchored suspension bridge with steel pylons and vertical hangers. The aerodynamic deck hangs on double vertical steel cables and it is 1,510 m long with a deck width of 39 m. The distance between the towers is 1,090 m and their height over road level is 105 m, the clearance of the bridge from sea level is 64 m. The bridge was designed by Freeman Fox & Partners and BOTEK Bosphorus Technical Consulting Corp. who had designed the Bosphorus Bridge. An international consortium of three Japanese companies, one Italian and one Turkish company carried out the construction works, the bridge was completed on July 3,1988 and opened by Prime Minister Turgut Özal, who drove his official car, becoming the first to cross. The cost of the bridge amounted to US$130 million, the bridge is on the Trans-European Motorway between Edirne and Ankara. The highway bridge has four lanes for vehicular traffic plus one emergency lane in each direction, on weekday mornings, commuter traffic flows mostly westbound to the European part, so five of the eight lanes run westbound and only three eastbound. Conversely, on evenings, five lanes are dedicated to eastbound traffic. Pedestrians are not allowed to use the bridge, currently, around 150,000 vehicles pass daily in both directions, almost 65% are automobiles. In addition to OGS, the contactless smart sticker HGS system is in use, an OGS device or HGS sticker can be obtained at various stations before the toll plaza of highways and bridges. Bosphorus Bridge, also called the First Bosphorus Bridge, Yavuz Sultan Selim Bridge, also called the Third Bosphorus Bridge. Great Istanbul Tunnel, a proposed three-level road-rail undersea tunnel, eurasia Tunnel, undersea tunnel, crossing the Bosphorus for vehicular traffic. Marmaray, transcontinental rail tunnel under the Bosphorus
9.
Yavuz Sultan Selim Bridge
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The Yavuz Sultan Selim Bridge is a bridge for rail and motor vehicle transit over the Bosphorus strait, to the north of two existing suspension bridges in Istanbul, Turkey. It was initially named the Third Bosphorus Bridge and it is about 5 km north of the Bosphorus Bridge. The bridge is located near the Black Sea entrance of the Bosphorus strait, the foundation stone laying ceremony was held on 29 May 2013. The bridge was opened to traffic on 26 August 2016, at 322 m, the bridge is the tallest suspension bridge in the world. It is, after the Millau Viaduct, the second-tallest bridge in the world of any type, the bridge is also one of the worlds widest suspension bridges, at 58.5 metres wide. The bridge is part of the projected 260 km Northern Marmara Motorway, the 58.4 m wide bridge is 2,164 m in length with a main span of 1,408 m. The main span is the ninth longest suspension bridge in the world, designed by the Swiss engineer Jean-François Klein and by the French structural engineer Michel Virlogeux from T-ingénierie, the bridge is a combined road-rail bridge. It carries four lanes and one railway line in each direction. The construction was carried out by a consortium of the Turkish company İçtaş, the budgeted cost of the bridges construction was 4.5 billion. The construction was expected to be completed in 36 months with the opening date scheduled for the end of 2015. On 29 May 2013 then Prime Minister Erdoğan directed the management team to finish the construction within 24 months. The bridge toll is set to be 9.90 between the motorway exits Odayeri and Paşaköy and it is expected that at least 135,000 vehicles will use the bridge daily in each direction. Plans for a third Bosphorus bridge were approved by the Ministry of Transportation in 2012, the construction of the project was awarded to the İçtaş-Astaldi consortium on 29 May 2012. The construction of the bridge began officially with the foundation stone-laying in a ceremony held on 29 May 2013, the ceremony was attended by the then State President Abdullah Gül, Prime Minister Recep Tayyip Erdoğan and numerous high-ranking officials. Erdoğan directed the management team to complete construction within 24 months. Work was temporarily halted in July 2013, when it became evident that the site was mislocated, both the ministry and the construction company have denied any change to the construction site location. In 1995, Erdoğan, then mayor of Istanbul, declared that a bridge would mean the murder of the city. On 5 April 2014, at about 21,00 local time, three workers were killed and another was injured by falling from a collapsed 50-metre-high scaffolding while concrete was poured at a viaduct
10.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
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