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Hradecky Bridge
The Hradecky Bridge ( sl, Hradeckega most) is one of the first hinged bridges in the world, the first and only preserved cast iron bridge in Slovenia, and one of its most highly valued technical achievements. It spans the Ljubljanica River in Ljubljana. At the time of its construction, it was praised as elegant, very modern, and economical. Because it was later used to transport the dead from the Ljubljana hospital to the mortuary, it was nicknamed the Mortuary Bridge (), but has retained its beauty and technical perfection. Throughout history, both names have persisted. Since 2011, it has been located at an extension of Hren Street () between the Krakovo Embankment () and the Gruden Embankment (), connecting the Trnovo District and the Prule neighbourhood in the Center District. It has three articulated arches, each of them made of two parts, joined with a bolt by the principle of the charnier arch at the highest point of the arch. Technically, it quite surpasses the Iron B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ljubljana
Ljubljana (also known by other historical names) is the capital and largest city of Slovenia. It is the country's cultural, educational, economic, political and administrative center. During antiquity, a Roman city called Emona stood in the area. Ljubljana itself was first mentioned in the first half of the 12th century. Situated at the middle of a trade route between the northern Adriatic Sea and the Danube region, it was the historical capital of Carniola, one of the Slovene-inhabited parts of the Habsburg monarchy. It was under Habsburg rule from the Middle Ages until the dissolution of the Austro-Hungarian Empire in 1918. After World War II, Ljubljana became the capital of the Socialist Republic of Slovenia, part of the Socialist Federal Republic of Yugoslavia. The city retained this status until Slovenia became independent in 1991 and Ljubljana became the capital of the newly formed state. Name The origin of the name ''Ljubljana'' is unclear. In the Middle Ages, both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Hermann (engineer)
Johann, or Jean-Frederic, Hermann, or Herrmann, (31 December 1738 in Barr, Bas-Rhin, Barr, Alsace – 4 October 1800 in Strasbourg) was a French physician and natural history, naturalist. In 1769 he was appointed professor of medicine at the School of Public Health of Strasbourg, then, in 1778, professor of philosophy, before going on, in 1784, to succeed Jacob Reinbold Spielmann as chair of chemistry, natural history and materia medica. In 1794 he became professor of botany and materia medica in the new School of Medicine. He was the author of ''Tabula affinitatum animalium '' (1783) and ''Observationes zoologicae quibus novae complures'', published posthumously in 1804. His collections and library of 18,000 volumes formed the basis of the Musée zoologique de la ville de Strasbourg, Natural History Museum of Strasbourg, where a reconstruction of his natural history cabinet was opened in 1988 . Hermann was also in charge of Jardin botanique de l'Université de Strasbourg, Str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast-iron Arch Bridges
Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, Grey iron, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and Ductile iron, ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable iron, malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
