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Hughes Memorial Tower
The Hughes Memorial Tower is a radio tower in Washington, D.C., at 6001 Georgia Avenue, near the intersection of 9th Street NW and Peabody Street NW. At , it is the tallest structure of any kind in the district, surpassing the Washington Monument by more than and the WTTG Television Tower by . It is the second-tallest freestanding structure in the Baltimore-Washington metropolitan area, after the 809-foot tall River Road Tower in Bethesda, Maryland. Completed on January 15, 1989, the tower sits at and at an elevation of above mean sea level. The tower is located on a relatively high spot just off Georgia Avenue NW, in Washington's Brightwood neighborhood, several miles from the city's main cluster of transmission towers in the Tenleytown neighborhood. Except for the 504-foot tower next to it, there are no nearby large structures. For these reasons, as well as its distinctive shape and large size, the tower is visible from a variety of locations in the District of Columbia an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landmark Tower Company
The Landmark Tower Company was based out of Fort Worth, Texas and founded by Henry “Hank” McGinnis. The company was known for designing and building a type of radio tower known by the same name. McGinnis, who had previous experience building electric transmission line towers, evidently came up with the unique design while scribbling a Ichthys, Christian symbol of a fish on a napkin. Tower design The prototypical Landmark tower, also known as an Adelphon tower, is a tripod in shape with three legs that rise to meet each other about a third of the way up. The legs taper down from larger footings to a thinner middle and then expand again to the point where they meet. The outer cords continue all the way up to the top of the tower in one swoop, but the inner three loop around into each other, creating a central ovoid and voided core. Aside from its unique appearance, the Landmark tower design has several advantages compared to the typical free standing lattice tower, with less ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Towers Completed In 1989
A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures. Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building. Etymology Old English ''torr'' is from Latin ''turris'' via Old French ''tor''. The Latin term together with Greek τύρσις was loaned from a pre-Indo-European Mediterranean language, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Masts And Towers In The United States
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lattice Towers
Lattice may refer to: Arts and design * Latticework, an ornamental criss-crossed framework, an arrangement of crossing laths or other thin strips of material * Lattice (music), an organized grid model of pitch ratios * Lattice (pastry), an ornamental pattern of crossing strips of pastry Companies * Lattice Engines, a technology company specializing in business applications for marketing and sales * Lattice Group, a former British gas transmission business * Lattice Semiconductor, a US-based integrated circuit manufacturer Science, technology, and mathematics Mathematics * Lattice (group), a repeating arrangement of points ** Lattice (discrete subgroup), a discrete subgroup of a topological group whose quotient carries an invariant finite Borel measure ** Lattice (module), a module over a ring which is embedded in a vector space over a field ** Lattice graph, a graph that can be drawn within a repeating arrangement of points ** Lattice-based cryptography, encryption systems bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Tallest Buildings In Washington, D
A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union club Other uses * Angle of list, the leaning to either port or starboard of a ship * List (information), an ordered collection of pieces of information ** List (abstract data type), a method to organize data in computer science * List on Sylt, previously called List, the northernmost village in Germany, on the island of Sylt * ''List'', an alternative term for ''roll'' in flight dynamics * To ''list'' a building, etc., in the UK it means to designate it a listed building that may not be altered without permission * Lists (jousting), the barriers used to designate the tournament area where medieval knights jousted * ''The Book of Lists'', an American series of books with unusual lists See also * The List (other) * Listing (di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Famous Transmission Sites
In the following there are lists of sites of notable radio transmitters. During the early history of radio many countries had only a few high power radio stations, operated either by the government or large corporations, which broadcast to the population or to other countries. Because of the large number of transmission sites, this list is not complete. Outside of Europe senders and repeater stations are emphatically presented from international services. Legend Europe Austria Belarus * Molodecno (VLF) Belgium * Schoten (FM, TV* Transmitter Wavre, Wavre (MW, SW shut down) FM DAB TV) *Overijse (MW closed) Bosnia and Herzegovina * Mostre transmitter (MW) Bulgaria *Kaliakra (MW) *Vakarel (LW, MW) Croatia *Grbre transmitter (MW) *Deanovec transmitter (MW, KW) Czech Republic * Liblice (LW closed 1.1.2021) * Liblice (MW closed) * Topolná (LW dismantled) * Mělník-Chloumek (MW closed) * Dobrochov (MW closed) * Jested (FM) Denmark *Kalundborg (LW, MW) Finland *Lahti (LW, SW ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lattice Tower
A lattice tower or truss tower is a freestanding vertical framework tower. This construction is widely used in transmission towers carrying high voltage electric power lines, in radio masts and towers (a self-radiating tower or as a support for aerials) and in observation towers. Its advantage is good shear strength at a much lower weight than a tower of solid construction would have as well as lower wind resistance. In structural engineering the term ''lattice tower'' is used for a freestanding structure, while a ''lattice mast'' is a guyed mast supported by guy lines. Lattices of triangular (3-sided) cross-section are most common, particularly in North America. Square (4-sided) lattices are also widely used and are most common in Eurasia. Lattice towers are often designed as either a space frame or a hyperboloid structure. Before 1940, they were used as radio transmission towers especially for short and medium wave. Occasionally lattice towers consisting of wood were utilized. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9-1-1
, usually written 911, is an emergency telephone number for the United States, Canada, Mexico, Panama, Palau, Argentina, Philippines, Jordan, as well as the North American Numbering Plan (NANP), one of eight N11 codes. Like other emergency numbers around the world, this number is intended for use in emergency circumstances only. Using it for any other purpose (such as making false or prank calls) is a crime in most jurisdictions. In over 98% of locations in Argentina, Panama, Belize, Anguilla, Costa Rica, Ecuador, Jordan, Ethiopia, Liberia, Saudi Arabia, Philippines, Uruguay, United States, Palau, Mexico, Tonga and Canada, dialing "9-1-1" from any telephone will link the caller to an emergency dispatch office—called a Public Safety Answering Point (PSAP) by the telecommunications industry—which can send emergency responders to the caller's location in an emergency. In approximately 96 percent of the United States, the enhanced 9-1-1 system automatically pairs caller ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Capital Planning Commission
The National Capital Planning Commission (NCPC) is a U.S. government executive branch agency that provides planning guidance for Washington, D.C., and the surrounding National Capital Region. Through its planning policies and review of development proposals, the Commission seeks to protect and enhance the extraordinary resources of the national capital. The 12-member commission includes three presidential appointees, of which one must be from Virginia and one from Maryland, the mayor of Washington, D.C., the chair of the Council of the District of Columbia, two mayoral appointees, and the chair of the House and Senate committees with review authority over the District. Other commission members include the heads of the three major land holding agencies, which are the Department of Defense, the Department of the Interior, and the General Services Administration. The Commission is supported by a professional staff of planners, architects, urban designers, historic preservation offic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ichthys
The ichthys or ichthus (), from the Koine Greek, Greek (, 1st cent. AD Koine Greek pronunciation: , "fish") is (in its modern rendition) a symbol consisting of two intersecting arcs, the ends of the right side extending beyond the meeting point so as to resemble the profile of a fish. It has been speculated that the symbol was adopted by Early Christianity, early Christians as a secret symbol; a shibboleth to determine if another was indeed Christian.Robert Mowat, “ΙΧΘΥΣ,” in Atti del II° congresso internazionale di archeologica cristi-ana tenuto in Roma nell’ aprile 1900 (Rome: Spithöver, 1902), 1–8Rasimus, T. ,2011''Revisiting the Ichthys: A Suggestion Concerning the Origins of Christological Fish Symbolism'' Pp 327-348 in '' Mystery and Secrecy in the Nag Hammadi Collection and Other Ancient Literature: Ideas and Practices.'' Biblical Studies, Ancient Near East and Early Christianity E-Books Online. "Such solutions, once popular, include the fish as a secret s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerodrome Beacon
An aerodrome beacon or rotating beacon or aeronautical beacon is a beacon installed at an airport or aerodrome to indicate its location to aircraft pilots at night. An aerodrome beacon is mounted on top of a towering structure, often a control tower, above other buildings of the airport. It produces flashes similar to that of a lighthouse. Airport and heliport beacons are designed in such a way to make them most effective from one to ten degrees above the horizon; however, they can be seen well above and below this peak spread. The beacon may be an omnidirectional flashing xenon strobe, or it may be an aerobeacon rotating at a constant speed which produces the visual effect of flashes at regular intervals. Flashes may be of one, two, or three alternating colors ( described below). In the United States In the United States, the Federal Aviation Administration (FAA) has established the following rules for airport beacons: Flashing rates # 24 to 30 per minute for beacons marki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
