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Landell De Moura
Father Roberto Landell de Moura (January 21, 1861 – June 30, 1928), commonly known as Roberto Landell, was a Brazilian Roman Catholic priest and inventor. He is best known for his work developing long-distance audio transmissions, using a variety of technologies, including an improved megaphone device, photophone (using light beams) and radio signals. It was reported in June 1899 that he had successfully transmitted audio over a distance of 7 kilometers (4.3 miles),"O Telephoro" ''(Rio de Janeiro) Jornal do Commercio'', June 14, 1899, page 1, column 6, reprinted from ''(São Paulo) Diario Hespanhol''. by Rodrigo Moura (landelldemoura.com.br)) which was followed by a second, public, demonstration on June 3, 1900. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porto Alegre
Porto Alegre (, , Brazilian ; ) is the capital and largest city of the Brazilian state of Rio Grande do Sul. Its population of 1,488,252 inhabitants (2020) makes it the List of largest cities in Brazil, twelfth most populous city in the country and the center of Brazil's List of metropolitan areas in Brazil, fifth largest metropolitan area, with 4,405,760 inhabitants (2010). The city is the southernmost capital city of a Brazilian state. Porto Alegre was founded in 1769 by Manuel Jorge Gomes de Sepúlveda, who used the pseudonym José Marcelino de Figueiredo to hide his identity; but the official date is 1772 with the act signed by Immigration to Brazil, immigrants from the Azores, Portugal. The city lies on the eastern bank of the Guaíba Lake, where five rivers converge to form the Lagoa dos Patos, a giant freshwater lagoon navigable by even the largest of ships. This five-river junction has become an important alluvial port as well as a chief industrial and commercial center ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Ambrose Fleming
Sir John Ambrose Fleming FRS (29 November 1849 – 18 April 1945) was an English electrical engineer and physicist who invented the first thermionic valve or vacuum tube, designed the radio transmitter with which the first transatlantic radio transmission was made, and also established the right-hand rule used in physics. He was the eldest of seven children of James Fleming DD (died 1879), a Congregational minister, and his wife Mary Ann, at Lancaster, Lancashire, and baptised on 11 February 1850. A devout Christian, he once preached at St Martin-in-the-Fields in London on evidence for the resurrection. In 1932, he and Douglas Dewar and Bernard Acworth helped establish the Evolution Protest Movement. Fleming bequeathed much of his estate to Christian charities, especially those for the poor. He was a noted photographer, painted watercolours, and enjoyed climbing the Alps. Early years Ambrose Fleming was born in Lancaster and educated at Lancaster Royal Grammar School, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Modulation
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing. In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e. the difference between the frequency of the carrier and its center frequency, has a functional relation to the modulating signal amplitude. Digital data can be encoded and transmitted with a type of frequency modulation known as frequency-shift keying (FSK), in which the instantaneous frequency of the carrier is shifted among a set of frequencies. The frequencies may represent digits, such as '0' and '1'. FSK is widely used in computer modems, such as fax modems, telephone caller ID systems, garage door openers, and other low-frequency transmissions. Radioteletype also uses FSK. Frequency modulation i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium Wave
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime, reception is usually limited to more local stations, though this is dependent on the signal conditions and quality of radio receiver used. Improved signal propagation at night allows the reception of much longer distance signals (within a range of about 2,000 km or 1,200 miles). This can cause increased interference because on most channels multiple transmitters operate simultaneously worldwide. In addition, amplitude modulation (AM) is often more prone to interference by various electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy and longer antennas. Digital modes are possible but have not reached momentum yet. MW was the main radio ban ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jair Soares
In the Biblical Book of Judges, Jair or Yair ( he, יָאִיר ''Yā’īr'', "he enlightens") was a man from Gilead of the Tribe of Manasseh, east of the River Jordan, who judged Israel for 22 years, after the death of Tola, who had ruled of 23 years. His inheritance was in Gilead through the line of Machir, the son of Manasseh. Yair was the son of Segub, the son of Hezron through the daughter of Machir (1 Chronicles 2). According to Judges 10:3–5, Yair had thirty sons, who rode thirty ass colts, and controlled 30 cities in Gilead which came to be known as Havoth-Yair (Judges 10:4; cf. 23 towns in 1 Chronicles 2:22). The word ''chawwoth'' ('tent encampments') occurs only in this context (''Numbers'' 32:41; ''Deuteronomy'' 3:14; ''Judges'' 10:4). Yair died and was buried in Camon (or Kamon). W. Ewing suggests that Kamon probably corresponds to Kamun taken by the Seleucid king Antiochus III, on his march from Pella to Gephrun (Polybius Book V.70:12). After his death there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monument To The Expeditionary
A monument is a type of structure that was explicitly created to commemorate a person or event, or which has become relevant to a social group as a part of their remembrance of historic times or cultural heritage, due to its artistic, historical, political, technical or architectural importance. Some of the first monuments were dolmens or menhirs, megalithic constructions built for religious or funerary purposes. Examples of monuments include statues, (war) memorials, historical buildings, archaeological sites, and cultural assets. If there is a public interest in its preservation, a monument can for example be listed as a UNESCO World Heritage Site. Etymology It is believed that the origin of the word "monument" comes from the Greek ''mnemosynon'' and the Latin ''moneo'', ''monere'', which means 'to remind', 'to advise' or 'to warn', however, it is also believed that the word monument originates from an Albanian word 'mani men' which in Albanian language means 'rememb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semana Da Pátria
''Semana'' (Spanish: ''Week'') is a weekly magazine in Colombia. History ''Semana'' was founded in 1946 by Alberto Lleras Camargo (who would become president of Colombia in 1958) and that folded in 1961. It was relaunched by journalist Felipe López Caballero in 1983. Development , the person who restarted the magazine, took two earlier Colombian magazines as models. One was Camargo's ''Semana''; the other was '':es:Alternativa'', a left-wing weekly published by Enrique Santos and Gabriel García Márquez. The foreign magazines that he strove to imitate were ''Time'' and ''Newsweek''. Recalling the prestige that had been enjoyed by Lleras's magazine, López asked for, and was given, permission to use the same name. The first issue came out on 12 May 12 1982. Its cover story was about terrorism. Some of ''Semana''s most important reporting has been about Pablo Escobar, the drug trafficking kingpin. In the 1980s, López was one of the two "big whistleblowers and critics" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Esq Eletr Transm Ondas Color , a Chinese-Japanese subcompact SUV
{{disambiguation ...
Esq or ESQ may refer to: * Employee screening questionnaire, a psychological test developed by Canadian psychology professor Douglas N. Jackson * Esquire (abbreviated Esq.), a modern, informal, non-royally awarded title * Ensoniq ESQ-1, a synthesizer released by Ensoniq in 1985 * Infiniti ESQ The is a subcompact crossover SUV (B-segment) produced by the Japanese car manufacturer Nissan since 2010. Debuted as a production vehicle at the 2010 Geneva Motor Show in March and positioned below the C-segment Qashqai, it was introduced to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crookes Tube
A Crookes tube (also Crookes–Hittorf tube) is an early experimental electrical discharge tube, with partial vacuum, invented by English physicist William Crookes and others around 1869-1875, in which cathode rays, streams of electrons, were discovered. Developed from the earlier Geissler tube, the Crookes tube consists of a partially evacuated glass bulb of various shapes, with two metal electrodes, the cathode and the anode, one at either end. When a high voltage is applied between the electrodes, cathode rays (electrons) are projected in straight lines from the cathode. It was used by Crookes, Johann Hittorf, Julius Plücker, Eugen Goldstein, Heinrich Hertz, Philipp Lenard, Kristian Birkeland and others to discover the properties of cathode rays, culminating in J.J. Thomson's 1897 identification of cathode rays as negatively charged particles, which were later named ''electrons''. Crookes tubes are now used only for demonstrating cathode rays. Wilhelm Röntgen discovered X ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernst Ruhmer
Ernst Walter Ruhmer (15 April 1878 – 8 April 1913) was a German physicist. He was best known for investigating practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight optical transmissions, sound-on-film audio recording, and television transmissions over wires. Career Ruhmer's father was an inventor and manufacturer. From 1897 to 1900 he studied mathematics and natural sciences in Berlin, and the next year continued his studies in Giessen. His early work included extensive research in developing selenium cells that were more sensitive, and faster reacting, to the effects of light illumination. In December 1902 he and Salomon Kalischer were issued German patent 151,971 for their method of producing photographic images by exposing electrically conductive selenium-coated plates. Ruhmer also designed a light-sensitive control switch, using a selenium cell, which was successfully used to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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