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Smoke Signal
The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication used over a long distance. In general smoke signals are used to transmit news, signal danger, or to gather people to a common area. History and usage In ancient China, soldiers along the Great Wall sent smoke signals on its beacon towers to warn one another of enemy invasion. The colour of the smoke communicated the size of the invading party. By placing the beacon towers at regular intervals, and situating a soldier in each tower, messages could be transmitted over the entire 7,300 kilometres of the Wall. Smoke signals also warned the inner castles of the invasion, allowing them to coordinate a defense and garrison supporting troops. In ancient Sri Lanka, soldiers stationed on the mountain peaks would alert each other of impending enemy attack (from English people, Dutch people or Portuguese people) by signaling from peak to peak. In this way, they were able to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederic Remington Smoke Signal
Frederic may refer to: Places United States * Frederic, Wisconsin, a village in Polk County * Frederic Township, Michigan, a township in Crawford County ** Frederic, Michigan, an unincorporated community Other uses * Frederic (band), a Japanese rock band * Frederic (given name), a given name (including a list of people and characters with the name) * Hurricane Frederic, a hurricane that hit the U.S. Gulf Coast in 1979 * Trent Frederic, American ice hockey player See also * Frédéric * Frederick (other) * Fredrik Fredrik is a masculine Germanic given name derived from the German name '' Friedrich'' or Friederich, from the Old High German ''fridu'' meaning "peace" and ''rîhhi'' meaning "ruler" or "power". It is the common form of Frederick in Norway, Finla ... * Fryderyk (other) {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography
Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or '' -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security ( data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively syn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southern subregion of a single continent called America. South America is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie to the northwest. The continent generally includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one internal territory: French Guiana. In addition, the ABC islands of the Kingdom of the Netherlands, Ascension Island (dependency of Saint Helena, Ascension and Tristan da Cunha, a British Overseas Territory), Bouvet Island ( dependency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yamana People
The Yahgan (also called Yagán, Yaghan, Yámana, Yamana or Tequenica) are a group of indigenous peoples in the Southern Cone. Their traditional territory includes the islands south of Isla Grande de Tierra del Fuego, extending their presence into Cape Horn, making them the world's southernmost human population. In the 19th century, the Yahgan were known in English as “Fuegians”. The term is now avoided as it can also refer to several other indigenous peoples of Tierra del Fuego, for example the Selk'nam. The Yahgan language, also known as Yámana, is considered a language isolate. Cristina Calderón (1928–2022), who was born on Navarino Island, Chile, was known as the last full-blooded Yahgan and last native speaker of the Yahgan language. Most Yahgans speak Spanish. The Yahgan were traditionally nomads and hunter-gatherers who traveled by canoe between islands to collect food. The men hunted sea lions and the women dove to collect shellfish. The Yahgan share some simi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distress Signal
A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of people, ship, aircraft, or other vehicle is threatened by a serious or imminent danger and requires immediate assistance.Aeronautical Information Manual U.S. Federal Aviation Administration, 2016 Use of distress signals in other circumstances may be against local or . An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smoke Grenade
Smoke grenades used at demonstrations in Paris, 2008 upBritish L83A1 Smoke Grenade manufactured in May 2008. This grenade has already been used. A smoke grenade is a canister-type grenade used as a signaling device, target or landing zone marking device, or as a screening device for unit movements. Smoke grenades generally emit a far larger amount of smoke than smoke bombs, which are a type of fireworks typically started with an external fuse rather than a pin and are more complex. Smoke grenades often cost around compared to smoke bombs, which can often cost just a few cents. The phrase "to smoke", meaning to fake, bluff, or beat around the bush, comes from the military usage of smoke grenades to obscure and conceal movement; similarly, "pop smoke", derived from a common way of ordering the use of smoke grenades, is used as a slang term for quickly leaving a place. __TOC__ Design left, Diagram and cross section of an AN M18 smoke grenade A typical design consists of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secret Ballot
The secret ballot, also known as the Australian ballot, is a voting method in which a voter's identity in an election or a referendum is anonymous. This forestalls attempts to influence the voter by intimidation, blackmailing, and potential vote buying. This system is one means of achieving the goal of political privacy. Secret ballots are used in conjunction with various voting systems. The most basic form of a secret ballot utilizes blank pieces of paper upon which each voter writes their choice. Without revealing the votes to anyone, the voter folds the ballot paper in half and places it in a sealed box. This box is later emptied for counting. An aspect of secret voting is the provision of a voting booth to enable the voter to write on the ballot paper without others being able to see what is being written. Today, printed ballot papers are usually provided, with the names of the candidates or questions and respective check boxes. Provisions are made at the polling place f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papal Conclave
A papal conclave is a gathering of the College of Cardinals convened to elect a bishop of Rome, also known as the pope. Catholics consider the pope to be the apostolic successor of Saint Peter and the earthly head of the Catholic Church. Concerns around political interference led to reforms after the interregnum of 1268–1271 and Pope Gregory X's decree during the Second Council of Lyons in 1274 that the cardinal electors should be locked in seclusion (Latin for 'with a key') and not permitted to leave until a new pope had been elected. Conclaves are now held in the Sistine Chapel of the Apostolic Palace in Vatican City.John Paul II (22 February 1996)''Universi Dominici gregis''. '' Apostolic constitution''. Vatican City: Vatican Publishing House. Since the Apostolic Age, the bishop of Rome, like other bishops, was chosen by the consensus of the clergy and laity of the diocese.Baumgartner 2003, p. 4. The body of electors was more precisely defined when, in 1059, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pope
The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Catholic Church, and has also served as the head of state or sovereign of the Papal States and later the Vatican City State since the eighth century. From a Catholic viewpoint, the primacy of the bishop of Rome is largely derived from his role as the apostolic successor to Saint Peter, to whom Petrine primacy, primacy was conferred by Jesus, who gave Peter the Keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the Church would be built. The current pope is Pope Francis, Francis, who was 2013 papal conclave, elected on 13 March 2013. While his office is called the papacy, the ecclesiastical jurisdiction, jurisdiction of the episcopal see is called the Holy See. It is the Holy See that is the sovereign enti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
College Of Cardinals
The College of Cardinals, or more formally the Sacred College of Cardinals, is the body of all cardinals of the Catholic Church. its current membership is , of whom are eligible to vote in a conclave to elect a new pope. Cardinals are appointed by the pope for life. Changes in life expectancy partly account for the increases in the size of the college.Broderick, 1987, p. 13. Since the emergence of the College of Cardinals in the early Middle Ages, the size of the body has historically been limited by popes, ecumenical councils, and even the College itself. The total number of cardinals from 1099 to 1986 has been about 2,900 (excluding possible undocumented 12th-century cardinals and pseudocardinals appointed during the Western Schism by pontiffs now considered to be antipopes, and subject to some other sources of uncertainty), nearly half of whom were created after 1655.Broderick, 1987, p. 11. History The word ''cardinal'' is derived from the Latin ''cardō'', meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tribe
The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English is in the discipline of anthropology. This definition is contested, in part due to conflicting theoretical understandings of social and kinship structures, and also reflecting the problematic application of this concept to extremely diverse human societies. The concept is often contrasted by anthropologists with other social and kinship groups, being hierarchically larger than a lineage or clan, but smaller than a chiefdom, nation or state. These terms are equally disputed. In some cases tribes have legal recognition and some degree of political autonomy from national or federal government, but this legalistic usage of the term may conflict with anthropological definitions. In the United States, Native American tribes are legally considered to have "domestic dependent nation" status within the territorial United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American Indians
The Indigenous peoples of the Americas are the inhabitants of the Americas before the arrival of the European settlers in the 15th century, and the ethnic groups who now identify themselves with those peoples. Many Indigenous peoples of the Americas were traditionally hunter-gatherers and many, especially in the Amazon basin, still are, but many groups practiced aquaculture and agriculture. While some societies depended heavily on agriculture, others practiced a mix of farming, hunting, and gathering. In some regions, the Indigenous peoples created monumental architecture, large-scale organized cities, city-states, chiefdoms, states, kingdoms, republics, confederacies, and empires. Some had varying degrees of knowledge of engineering, architecture, mathematics, astronomy, writing, physics, medicine, planting and irrigation, geology, mining, metallurgy, sculpture, and gold smithing. Many parts of the Americas are still populated by Indigenous peoples; some countries have sizea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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