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Henri De Miffonis
Henri de Miffonis (May 24, 1882 - 1955), born as Louis Fernand Henri de Miffonis, was a civil engineer. He was born in Boulogne-Billancourt, France and died in Canada in 1955. Miffonis specialized in the construction of lighthouses. He studied in civil engineering at the University of Paris. In 1905, after obtaining his diploma, he accepted an offer of employment with the Department of Fisheries and Oceans in Canada for work with the ''Commission des phares'' (Commission of Lighthouses), newly created. Miffonis' work was supervised by the Chief Engineer of the Commission, William Patrick Anderson, a fervent promoter of reinforced concrete in the construction of lighthouses. The recruitment of Miffonis, for his competence in the use of concrete, corresponded with an intense period of maritime infrastructure construction in Canada, and in particular, the construction of lighthouses. During the first three years of the Commission, Miffonis developed and patented in 1908 plans for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boulogne-Billancourt
Boulogne-Billancourt (; often colloquially called simply Boulogne, until 1924 Boulogne-sur-Seine, ) is a wealthy and prestigious Communes of France, commune in the Parisian area, located from its Kilometre zero, centre. It is a Subprefectures in France, subprefecture of the Hauts-de-Seine Departments of France, department and thus the seat of the larger arrondissement of Boulogne-Billancourt. Boulogne-Billancourt includes two large islands in the Seine: Île Saint-Germain and Île Seguin. With a population of 121,334 as of 2018, it is the most populous commune in Hauts-de-Seine and most populous suburb of Paris, as well as one of the most densely populated municipalities in Europe. Boulogne-Billancourt is one of the wealthiest regions in the Parisian area and in France. Formerly an important industrial site, it has successfully reconverted into business services and is now home to major communication companies headquartered in the Val de Seine Central business district, business ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plan D'une Tour De Phare En Béton Armé Brevet 112206
A plan is typically any diagram or list of steps with details of timing and resources, used to achieve an objective to do something. It is commonly understood as a temporal set of intended actions through which one expects to achieve a goal. For spatial or planar topologic or topographic sets see map. Plans can be formal or informal: * Structured and formal plans, used by multiple people, are more likely to occur in projects, diplomacy, careers, economic development, military campaigns, combat, sports, games, or in the conduct of other business. In most cases, the absence of a well-laid plan can have adverse effects: for example, a non-robust project plan can cost the organization time and money. * Informal or ad hoc plans are created by individuals in all of their pursuits. The most popular ways to describe plans are by their breadth, time frame, and specificity; however, these planning classifications are not independent of one another. For instance, there is a close rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbital Period
The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars. For celestial objects in general, the sidereal period ( sidereal year) is referred to by the orbital period, determined by a 360° revolution of one body around its primary, e.g. Earth around the Sun, relative to the fixed stars projected in the sky. Orbital periods can be defined in several ways. The tropical period is more particularly about the position of the parent star. It is the basis for the solar year, and respectively the calendar year. The synodic period incorporates not only the orbital relation to the parent star, but also to other celestial objects, making it not a mere different approach to the orbit of an object around its parent, but a period of orbital relations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Astrophysical Journal
''The Astrophysical Journal'', often abbreviated ''ApJ'' (pronounced "ap jay") in references and speech, is a peer-reviewed Peer review is the evaluation of work by one or more people with similar competencies as the producers of the work (peers). It functions as a form of self-regulation by qualified members of a profession within the relevant field. Peer review ... scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler. The journal discontinued its print edition and became an electronic-only journal in 2015. Since 1953 ''The Astrophysical Journal Supplement Series'' (''ApJS'') has been published in conjunction with ''The Astrophysical Journal'', with generally longer articles to supplement the material in the journal. It publishes six volumes per year, with two 280-page issues per volume. ''The Astrophysical Journal Letters'' (''ApJL''), established in 1967 by Subrahmanyan Chandrasekhar as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franklin Institute
The Franklin Institute is a science museum and the center of science education and research in Philadelphia, Pennsylvania. It is named after the American scientist and statesman Benjamin Franklin. It houses the Benjamin Franklin National Memorial. Founded in 1824, the Franklin Institute is one of the oldest centers of science education and development in the United States. Its chief astronomer is Derrick Pitts. History On February 5, 1824, Samuel Vaughan Merrick and William H. Keating founded the Franklin Institute of the State of Pennsylvania for the Promotion of the Mechanic Arts. Begun in 1825, the institute was an important force in the professionalization of American science and technology through the nineteenth century, beginning with early investigations into steam engines and water power. In addition to conducting scientific inquiry, it fostered research and education by running schools, publishing the influential ''Journal of The Franklin Institute'', sponsoring e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen's University At Kingston
Queen's University at Kingston, commonly known as Queen's University or simply Queen's, is a public research university in Kingston, Ontario, Canada. Queen's holds more than of land throughout Ontario and owns Herstmonceux Castle in East Sussex, England. Queen's is organized into eight faculties and schools. The Church of Scotland established Queen's College in October 1841 via a royal charter from Queen Victoria. The first classes, intended to prepare students for the ministry, were held 7 March 1842 with 13 students and two professors. In 1869, Queen's was the first Canadian university west of the Maritime provinces to admit women. In 1883, a women's college for medical education affiliated with Queen's University was established after male staff and students reacted with hostility to the admission of women to the university's medical classes. In 1912, Queen's ended its affiliation with the Presbyterian Church, and adopted its present name. During the mid-20th century, the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortar (masonry)
Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colors or patterns to masonry walls. In its broadest sense, mortar includes pitch, asphalt, and soft mud or clay, as those used between mud bricks, as well as cement mortar. The word "mortar" comes from Old French ''mortier'', "builder's mortar, plaster; bowl for mixing." (13c.). Cement mortar becomes hard when it cures, resulting in a rigid aggregate structure; however, the mortar functions as a weaker component than the building blocks and serves as the sacrificial element in the masonry, because mortar is easier and less expensive to repair than the building blocks. Bricklayers typically make mortars using a mixture of sand, a binder, and water. The most common binder since the early 20th century is Portland cement, but the ancient binder lim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pointe-du-Lac
Pointe-du-Lac is one of the six boroughs of the city of Trois-Rivières and a former municipality in Quebec, Canada on the St. Lawrence River. It was founded in 1738 and its current church dates from 1882. Another old building in the village is the Moulin Seigneurial, founded in 1721 and rescued in the 70s by resident Mariette Chenay. The municipality was amalgamated into the City of Trois-Rivières Trois-Rivières (, – 'Three Rivers') is a city in the Mauricie administrative region of Quebec, Canada, at the confluence of the Saint-Maurice River, Saint-Maurice and Saint Lawrence River, Saint Lawrence rivers, on the north shore of the Sain ... in 2002. Population (2001 census) 6,902. Populated places established in 1738 Populated places disestablished in 2002 Neighbourhoods in Trois-Rivières Former cities in Quebec 1738 establishments in the French colonial empire {{quebec-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quay
A wharf, quay (, also ), staith, or staithe is a structure on the shore of a harbour or on the bank of a river or canal where ships may dock to load and unload cargo or passengers. Such a structure includes one or more berths (mooring locations), and may also include piers, warehouses, or other facilities necessary for handling the ships. Wharves are often considered to be a series of docks at which boats are stationed. Overview A wharf commonly comprises a fixed platform, often on pilings. Commercial ports may have warehouses that serve as interim storage: where it is sufficient a single wharf with a single berth constructed along the land adjacent to the water is normally used; where there is a need for more capacity multiple wharves, or perhaps a single large wharf with multiple berths, will instead be constructed, sometimes projecting over the water. A pier, raised over the water rather than within it, is commonly used for cases where the weight or volume of cargos will be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estevan Point
Estevan Point is a lighthouse located on the headland of the same name on the Hesquiat Peninsula on the west coast of Vancouver Island, Canada. During World War II, in 1942, the Estevan Point lighthouse was fired upon by the Japanese submarine , marking the first enemy attack on Canadian soil since the Fenian Raids of 1866 and 1871. Currently the Canadian Coast Guard still maintains Estevan Point, with the light still active as of 2022. The light emits a signal of a double flash every 15 seconds with the focal plane located at above sea level. History The Spanish explorer Juan José Pérez Hernández, originating from Mallorca, traded with the natives of the region (the Nuu-chah-nulth people) when he explored the area in 1774 and named the headland "Punta San Esteban". Four years later, James Cook's expedition arrived in the Nootka Sound and made contact with the local population. The lighthouse was established in 1909 as one in a series of buttressed lighthouses designed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribou Island Lighthouse
Caribou Island Lighthouse sits on the uninhabited Caribou Island in the eastern end of Lake Superior, south of Michipicoten Island. It lies entirely within the territorial waters of Canada although only about three miles from the international border between Canada and the United States. It is approximately long and approximately wide. A dangerous reef stretches along the north and west shores of Caribou Island, and a shallow reef stretches beyond to the southwest to Caribou Island, lying only below the lake's surface. The unmanned lighthouse, which is owned by the Canadian Coast Guard, is located on a tiny adjacent island called Lighthouse Island a few hundred feet across and positioned west of the southern tip of the main island. When originally built, it was visible for and operated on a 30-second revolving cycle. Caribou Island is about off Agawa Bay on the east shore of the lake. History The present light was built in 1912 (station established 1886), flashes white ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
