1.
Amateur radio operator
–
As a component of their license, amateur radio operators are assigned a call sign that they use to identify themselves during communication. There are about three million amateur radio operators worldwide, amateur radio operators are also known as radio amateurs or hams. The term ham as a nickname for radio operators originated in a pejorative usage by operators in commercial and professional radio communities. The word was adopted by amateur radio operators. Few governments maintain detailed demographic statistics of their radio operator populations. The majority of radio operators worldwide reside in Japan, the United States, Thailand, South Korea. The top five countries by percentage of the population are Japan, Slovenia, Taiwan, South Korea, only the governments of Yemen and North Korea currently prohibit their citizens from becoming amateur radio operators. In some countries, acquiring an amateur license is difficult because of the bureaucratic processes or fees that place access to a license out of reach for most citizens. Most nations permit foreign nationals to earn an amateur radio license, in the vast majority of countries, the population of amateur radio operators is predominantly male. In China 12% of amateur operators are women, whilst in the United States is it approximately 15%. The Young Ladies Radio League is an organization of female amateur radio operators. A male amateur radio operator can be referred to as an OM, a female amateur radio operator can be referred to as a YL, from the abbreviation used for young lady, regardless of the operators age. Sometimes the wife of a ham operator is called a YF, although these codes are derived from English language abbreviations, their use is common among amateur radio operators worldwide. Incidentally, the most common language heard in the HF amateur bands is English, in most countries there is no minimum age requirement to earn an amateur radio license and become an amateur radio operator. Although the number of radio operators in many countries increases from year to year. In some countries, the age is over 80 years old. The World Wide Young Contesters organization promotes youth involvement, particularly amongst Europeans, a strong tie also exists between the amateur radio community and the Scouting movement to introduce radio technology to youth. WOSMs annual Jamboree On The Air is Scoutings largest activity, with a half million Scouts, when referring to a person, the phrase Silent Key and its abbreviation SK indicates an amateur radio operator who is deceased
2.
Radio
–
When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form, Radio systems need a transmitter to modulate some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation. Radio systems also need an antenna to convert electric currents into radio waves, an antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected, the electromagnetic wave is intercepted by a tuned receiving antenna. Radio frequencies occupy the range from a 3 kHz to 300 GHz, a radio communication system sends signals by radio. The term radio is derived from the Latin word radius, meaning spoke of a wheel, beam of light, however, this invention would not be widely adopted. The switch to radio in place of wireless took place slowly and unevenly in the English-speaking world, the United States Navy would also play a role. Although its translation of the 1906 Berlin Convention used the terms wireless telegraph and wireless telegram, the term started to become preferred by the general public in the 1920s with the introduction of broadcasting. Radio systems used for communication have the following elements, with more than 100 years of development, each process is implemented by a wide range of methods, specialised for different communications purposes. Each system contains a transmitter, This consists of a source of electrical energy, the transmitter contains a system to modulate some property of the energy produced to impress a signal on it. This modulation might be as simple as turning the energy on and off, or altering more subtle such as amplitude, frequency, phase. Amplitude modulation of a carrier wave works by varying the strength of the signal in proportion to the information being sent. For example, changes in the strength can be used to reflect the sounds to be reproduced by a speaker. It was the used for the first audio radio transmissions. Frequency modulation varies the frequency of the carrier, the instantaneous frequency of the carrier is directly proportional to the instantaneous value of the input signal. FM has the capture effect whereby a receiver only receives the strongest signal, Digital data can be sent by shifting the carriers frequency among a set of discrete values, a technique known as frequency-shift keying. FM is commonly used at Very high frequency radio frequencies for high-fidelity broadcasts of music, analog TV sound is also broadcast using FM. Angle modulation alters the phase of the carrier wave to transmit a signal
3.
Amateur radio station
–
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator. Radio amateurs build and operate several types of radio stations, including fixed ground stations, mobile stations, space stations. A slang term used for an amateur stations location is the shack, named after the small enclosures added to the upperworks of naval ships to hold early radio equipment. See also An amateur radio station established in a permanent structure with equipment that is not intended for operation is referred to as a fixed station. This is the most common form of radio station, and can be found in homes, schools. A typical fixed station is equipped with a transceiver and one or more antennas, fixed stations might also be equipped with amplifiers, antenna rotators, SWR meters, and other station accessories. Fixed stations are powered from the AC mains electrical supply available in the building. Some equipment in fixed stations may run off low voltage DC instead of AC, some fixed stations are equipped with auxiliary sources of power, such as electrical generators or batteries for use in emergencies. An amateur radio station installed in a vehicle is referred to as a mobile station, a typical mobile station is equipped with a transceiver, one or more antennas, and a microphone. The transceiver may be designed for installation in vehicles. Most antennas used in mobile stations are omnidirectional, few mobile stations are equipped to communicate with Morse code or digital modes. Most mobile stations are designed to be operated by the operator while driving. Most transceivers installed in vehicles are designed to run on 12-16 VDC, a specialized form of mobile station used for competition in a VHF amateur radio contest in North America is called a rover station. While it may not be a requirement, many mobile stations will append a /M to end of their call sign while operating to identify themselves to other stations as a mobile station. Rover station operating in a VHF contest will append a /R to the end of their call sign, maritime mobile stations are mobile stations installed in a watercraft, usually an ocean-going vessel. When in international waters, these stations are operated under the authority of the flag under which the vessel is registered. In addition to the requirements of amateur radio, operation of maritime mobile stations also requires the permission of the captain of the vessel. Maritime mobile stations append a /MM to end of their call sign, aeronautical mobile stations are mobile stations installed in an aircraft
4.
Television
–
Television or TV is a telecommunication medium used for transmitting moving images in monochrome, or in color, and in two or three dimensions and sound. The term can refer to a set, a television program. Television is a medium for entertainment, education, news, politics, gossip. Television became available in experimental forms in the late 1920s. After World War II, a form of black-and-white TV broadcasting became popular in the United States and Britain, and television sets became commonplace in homes, businesses. During the 1950s, television was the medium for influencing public opinion. In the mid-1960s, color broadcasting was introduced in the US, for many reasons, the storage of television and video programming now occurs on the cloud. At the end of the first decade of the 2000s, digital television transmissions greatly increased in popularity, another development was the move from standard-definition television to high-definition television, which provides a resolution that is substantially higher. HDTV may be transmitted in various formats, 1080p, 1080i, in 2013, 79% of the worlds households owned a television set. Most TV sets sold in the 2000s were flat-panel, mainly LEDs, major manufacturers announced the discontinuation of CRT, DLP, plasma, and even fluorescent-backlit LCDs by the mid-2010s. In the near future, LEDs are gradually expected to be replaced by OLEDs, also, major manufacturers have announced that they will increasingly produce smart TVs in the mid-2010s. Smart TVs with integrated Internet and Web 2.0 functions became the dominant form of television by the late 2010s, Television signals were initially distributed only as terrestrial television using high-powered radio-frequency transmitters to broadcast the signal to individual television receivers. Alternatively television signals are distributed by cable or optical fiber, satellite systems and. Until the early 2000s, these were transmitted as analog signals, a standard television set is composed of multiple internal electronic circuits, including a tuner for receiving and decoding broadcast signals. A visual display device which lacks a tuner is correctly called a video monitor rather than a television, the word television comes from Ancient Greek τῆλε, meaning far, and Latin visio, meaning sight. The Anglicised version of the term is first attested in 1907 and it was. formed in English or borrowed from French télévision. In the 19th century and early 20th century, other. proposals for the name of a technology for sending pictures over distance were telephote. The abbreviation TV is from 1948, the use of the term to mean a television set dates from 1941
5.
Shortwave radio
–
Shortwave radio is radio transmission using shortwave frequencies, generally 1. 6–30 MHz, just above the medium wave AM broadcast band. Radio waves in this band can be reflected or refracted from a layer of charged atoms in the atmosphere called the ionosphere. Therefore, short waves directed at an angle into the sky can be reflected back to Earth at great distances and this is called skywave or skip propagation. Shortwave radio is used for broadcasting of voice and music to listeners over very large areas. It is also used for military radar, diplomatic communication. The widest popular definition of the frequency interval is the ITU Region 1 definition, and is the span 1. 6–30 MHz, just above the medium wave band. In reality, the definition of the frequency band is a mess. The broadcast medium wave band now extends above the 200 m/1500 kHz limit, early radio telegraphy had used long wave transmissions. The drawbacks to this included a very limited spectrum available for long distance communication. It was also difficult to beam the radio wave directionally with long wave, prior to the 1920s, the shortwave frequencies above 1.5 MHz were regarded as useless for long distance communication and were designated in many countries for amateur use. Franklin rigged up an antenna at Poldhu Wireless Station, Cornwall. In June and July 1923, wireless transmissions were completed during nights on 97 meters from Poldhu to Marconis yacht Elettra in the Cape Verde Islands, in September 1924, Marconi transmitted daytime and nighttime on 32 meters from Poldhu to his yacht in Beirut. Franklin went on to refine the directional transmission, by inventing the curtain array aerial system, the UK-to-Canada shortwave Beam Wireless Service went into commercial operation on 25 October 1926. Beam Wireless Services from the UK to Australia, South Africa, Shortwave communications began to grow rapidly in the 1920s, similar to the internet in the late 20th century. Shortwave also ended the need for investments in massive longwave wireless stations. The cable companies began to lose large sums of money in 1927, the British government convened the Imperial Wireless and Cable Conference in 1928 to examine the situation that had arisen as a result of the competition of Beam Wireless with the Cable Services. The name of the company was changed to Cable and Wireless Ltd. in 1934, long-distance cables had a resurgence beginning in 1956 with the laying of TAT-1 across the Atlantic Ocean, the first voice frequency cable on this route. This provided 36 high quality telephone channels and was followed by even higher capacity cables all around the world
6.
Postcard
–
A postcard or post card is a rectangular piece of thick paper or thin cardboard intended for writing and mailing without an envelope. Shapes other than rectangular may also be used, there are novelty exceptions, such as wood postcards, made of thin wood, and copper postcards sold in the Copper Country of the U. S. state of Michigan, and coconut postcards from tropical islands. In some places, one can send a postcard for a lower fee than for a letter, stamp collectors distinguish between postcards and postal cards. While a postcard is usually printed by a company, individual or organization. The worlds oldest postcard was sent in 1840 to the writer Theodore Hook from Fulham in London, the study and collecting of postcards is termed deltiology. Cards with messages had been created and posted by individuals since the beginning of postal services. The earliest known picture postcard was a design on card, posted in Fulham in London by the writer Theodore Hook to himself in 1840. He probably created and posted the card to himself as a joke on the postal service, since the image is a caricature of workers in the post office. In 2002 the postcard sold for a record £31,750, in Britain, postcards without images were issued by the Post Office in 1870, and were printed with a stamp as part of the design, which was included in the price of purchase. These cards came in two sizes, the larger size was found to be slightly too large for ease of handling, and was soon withdrawn in favour of cards 13mm shorter. The first known printed picture postcard, with an image on one side, was created in France in 1870 at Camp Conlie by Léon Besnardeau, Conlie was a training camp for soldiers in the Franco-Prussian war. While these are certainly the first known picture postcards, there was no space for stamps, in the following year the first known picture postcard in which the image functioned as a souvenir was sent from Vienna. The first advertising card appeared in 1872 in Great Britain and the first German card appeared in 1874, Cards showing images increased in number during the 1880s. Images of the newly built Eiffel Tower in 1889 and 1890 gave impetus to the postcard, Early postcards often showcased photography of nude women. These were commonly known as French postcards, due to the number of them produced in France. The first American postcard was developed in 1873 by the Morgan Envelope Factory of Springfield and these first postcards depicted the Interstate Industrial Exposition that took place in Chicago. Later in 1873, Post Master John Creswell introduced the first pre-stamped Postal Cards, Postcards were made because people were looking for an easier way to send quick notes. The first postcard to be printed as a souvenir in the United States was created in 1893 to advertise the Worlds Columbian Exposition in Chicago, initially, the United States government prohibited private companies from calling their cards postcards, so they were known as souvenir cards
7.
Buffalo, New York
–
Buffalo is a city in western New York state and the county seat of Erie County, on the eastern shores of Lake Erie at the head of the Niagara River. As of 2014, Buffalo is New York states 2nd-most populous city after New York City, the metropolitan area has a population of 1.13 million. After an economic downturn in the half of the 20th century, Buffalos economy has transitioned to sectors that include financial services, technology, biomedical engineering. Residents of Buffalo are called Buffalonians, the citys nicknames include The Queen City, The Nickel City and The City of Good Neighbors. The city of Buffalo received its name from a creek called Buffalo Creek. British military engineer Captain John Montresor made reference to Buffalo Creek in his journal of 1764, there are several theories regarding how Buffalo Creek received its name. In 1804, as principal agent opening the area for the Holland Land Company, Joseph Ellicott, designed a radial street and grid system that branches out from downtown like bicycle spokes similar to the street system he used in the nations capital. Although Ellicott named the settlement New Amsterdam, the name did not catch on, during the War of 1812, on December 30,1813, Buffalo was burned by British forces. The George Coit House 1818 and Samuel Schenck House 1823 are currently the oldest houses within the limits of the City of Buffalo, on October 26,1825, the Erie Canal was completed with Buffalo a port-of-call for settlers heading westward. At the time, the population was about 2,400, the Erie Canal brought about a surge in population and commerce, which led Buffalo to incorporate as a city in 1832. In 1845, construction began on the Macedonia Baptist Church, an important meeting place for the abolitionist movement, Buffalo was a terminus point of the Underground Railroad with many fugitive slaves crossing the Niagara River to Fort Erie, Ontario in search of freedom. During the 1840s, Buffalos port continued to develop, both passenger and commercial traffic expanded with some 93,000 passengers heading west from the port of Buffalo. Grain and commercial goods shipments led to repeated expansion of the harbor, in 1843, the worlds first steam-powered grain elevator was constructed by local merchant Joseph Dart and engineer Robert Dunbar. Darts Elevator enabled faster unloading of lake freighters along with the transshipment of grain in bulk from barges, canal boats, by 1850, the citys population was 81,000. At the dawn of the 20th century, local mills were among the first to benefit from hydroelectric power generated by the Niagara River, the city got the nickname City of Light at this time due to the widespread electric lighting. It was also part of the revolution, hosting the brass era car builders Pierce Arrow. President William McKinley was shot and mortally wounded by an anarchist at the Pan-American Exposition in Buffalo on September 6,1901, McKinley died in the city eight days later and Theodore Roosevelt was sworn in at the Wilcox Mansion as the 26th President of the United States. The Great Depression of 1929–39 saw severe unemployment, especially working class men
8.
Philadelphia
–
In 1682, William Penn, an English Quaker, founded the city to serve as capital of the Pennsylvania Colony. Philadelphia was one of the capitals in the Revolutionary War. In the 19th century, Philadelphia became an industrial center. It became a destination for African-Americans in the Great Migration. The areas many universities and colleges make Philadelphia a top international study destination, as the city has evolved into an educational, with a gross domestic product of $388 billion, Philadelphia ranks ninth among world cities and fourth in the nation. Philadelphia is the center of activity in Pennsylvania and is home to seven Fortune 1000 companies. The Philadelphia skyline is growing, with a market of almost 81,900 commercial properties in 2016 including several prominent skyscrapers. The city is known for its arts, culture, and rich history, Philadelphia has more outdoor sculptures and murals than any other American city. Fairmount Park, when combined with the adjacent Wissahickon Valley Park in the watershed, is one of the largest contiguous urban park areas in the United States. The 67 National Historic Landmarks in the city helped account for the $10 billion generated by tourism, Philadelphia is the only World Heritage City in the United States. Before Europeans arrived, the Philadelphia area was home to the Lenape Indians in the village of Shackamaxon, the Lenape are a Native American tribe and First Nations band government. They are also called Delaware Indians and their territory was along the Delaware River watershed, western Long Island. Most Lenape were pushed out of their Delaware homeland during the 18th century by expanding European colonies, Lenape communities were weakened by newly introduced diseases, mainly smallpox, and violent conflict with Europeans. Iroquois people occasionally fought the Lenape, surviving Lenape moved west into the upper Ohio River basin. The American Revolutionary War and United States independence pushed them further west, in the 1860s, the United States government sent most Lenape remaining in the eastern United States to the Indian Territory under the Indian removal policy. In the 21st century, most Lenape now reside in the US state of Oklahoma, with communities living also in Wisconsin, Ontario. The Dutch considered the entire Delaware River valley to be part of their New Netherland colony, in 1638, Swedish settlers led by renegade Dutch established the colony of New Sweden at Fort Christina and quickly spread out in the valley. In 1644, New Sweden supported the Susquehannocks in their defeat of the English colony of Maryland
9.
Akron, Ohio
–
Akron /ˈækrən/ is the fifth-largest city in the U. S. state of Ohio and is the county seat of Summit County. It is located on the edge of the Glaciated Allegheny Plateau. As of the 2015 Census Estimate, the city proper had a population of 197,542. The Akron, OH Metropolitan Statistical Area covers Summit and Portage counties and it is also part of the larger Cleveland-Akron-Canton, OH Combined Statistical Area, which in 2013 had a population of 3,501,538, ranking 15th. Co-founded along the Little Cuyahoga River in 1825 by Simon Perkins and Paul Williams, it was done so being a point at the summit of the developing Ohio. The name derived from the Greek word ἄκρον signifying a summit or high point, due to Eliakim Crosby founding North Akron in 1833, South was added to its name until the two merged into an incorporated village in 1836. Neighboring settlements Kenmore and Ellet became annexed in 1929 and it is a setting for several movie films, television shows and novel stories, and is the origin of fictional characters. Residents of the city are called Akronites and it has had many nicknames, three of which are Rubber Capital of the World, Rubber City and City of Invention. Akron became a manufacturing center owing to its location on the canal, as well as being connected to numerous others and railroad lines. The city is home to the All-American Soapbox Derby, WGC-Bridgestone Invitational, Stan Hywet Hall and Gardens, Akron City Hospital, the Goodyear Polymer Center, and Alcoholics Anonymous. Listed by Newsweek as one of ten Information Age high tech havens, it was awarded by the National Civic League, residents Frank and Charles Menches have a disputed claim of inventing the hamburger thus the annual national festival is hosted in the city. A creature often referred to as the Kenmore Grassman is reported through history, Notable historical events that occurred in the city includes the Akron School Law of 1847 creating the K-12 system, and Sojourner Truth giving her Aint I A Woman. Resident Ferdinand Schumacher supplied the Union Army with quaker oats during the American Civil War. Akron is known for the rubber, tire, and airship industries among others, including the trucking, stoneware, sewer pipe, fishing tackle, farming equipment, mining, match, zipper, and toy industries. With a population increase of 201. 8% during the 1910s, three major civil unrest events took place during the riot of 1900, rubber strike of 1936, and the Wooster Avenue riots of 1968. Du Bois and President Bill Clinton gave speeches on race relations in the city, while visiting during August 1914, Marcus Garvey founded the Universal Negro Improvement Association. In 1971, James R. Williams founded Alpha Phi Alpha Homes Inc. to build the Channelwood Village area of Akron. During a 2016 march on West Market Street, purple heart Vietnam War veteran, Notable criminal history includes mobster Rosario Borgio headquartering the areas black hand operations, and Pretty Boy Floyds Walker-Mitchell mobs activities
10.
England
–
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west, the Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east, the country covers five-eighths of the island of Great Britain in its centre and south, and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. England became a state in the 10th century, and since the Age of Discovery. The Industrial Revolution began in 18th-century England, transforming its society into the worlds first industrialised nation, Englands terrain mostly comprises low hills and plains, especially in central and southern England. However, there are uplands in the north and in the southwest, the capital is London, which is the largest metropolitan area in both the United Kingdom and the European Union. In 1801, Great Britain was united with the Kingdom of Ireland through another Act of Union to become the United Kingdom of Great Britain and Ireland. In 1922 the Irish Free State seceded from the United Kingdom, leading to the latter being renamed the United Kingdom of Great Britain, the name England is derived from the Old English name Englaland, which means land of the Angles. The Angles were one of the Germanic tribes that settled in Great Britain during the Early Middle Ages, the Angles came from the Angeln peninsula in the Bay of Kiel area of the Baltic Sea. The earliest recorded use of the term, as Engla londe, is in the ninth century translation into Old English of Bedes Ecclesiastical History of the English People. According to the Oxford English Dictionary, its spelling was first used in 1538. The earliest attested reference to the Angles occurs in the 1st-century work by Tacitus, Germania, the etymology of the tribal name itself is disputed by scholars, it has been suggested that it derives from the shape of the Angeln peninsula, an angular shape. An alternative name for England is Albion, the name Albion originally referred to the entire island of Great Britain. The nominally earliest record of the name appears in the Aristotelian Corpus, specifically the 4th century BC De Mundo, in it are two very large islands called Britannia, these are Albion and Ierne. But modern scholarly consensus ascribes De Mundo not to Aristotle but to Pseudo-Aristotle, the word Albion or insula Albionum has two possible origins. Albion is now applied to England in a poetic capacity. Another romantic name for England is Loegria, related to the Welsh word for England, Lloegr, the earliest known evidence of human presence in the area now known as England was that of Homo antecessor, dating to approximately 780,000 years ago. The oldest proto-human bones discovered in England date from 500,000 years ago, Modern humans are known to have inhabited the area during the Upper Paleolithic period, though permanent settlements were only established within the last 6,000 years
