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Alfred Traeger
Alfred Hermann Traeger (2 August 1895 – 31 July 1980), known as Alf Traeger, was an Australian engineer and inventor, chiefly known for the development of the pedal radio. Early life and education Traeger was born at Glenlee, near Dimboola, Victoria (Australia), Victoria, and raised near and in Adelaide, South Australia, the son of South Australian-born parents. His paternal grandparents had been German Australians, German migrants to the young colony in 1848. Traeger attended Balaklava, South Australia, Balaklava Public School, about north of Adelaide, then German schools in South Australia, Martin Luther School in Flinders Street, Adelaide, followed by two years at Adelaide Technical High School (now Glenunga International High School). From 1912, aged 16, he spent three years at the South Australian School of Mines and Industries, studying mechanical engineering, mechanical and electrical engineering, earning an Associate Diploma. At the age of 12, he built a telephone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimboola
Dimboola is a town in the Shire of Hindmarsh in the Wimmera region of western Victoria (Australia), Victoria, Australia, 334 kilometres north-west of Melbourne. History Situated on the Wimmera River, Dimboola was previously known as 'Nine Creeks'. Following a survey conducted in late 1862 by contractor Frederick Smith of Ararat, a plan for a township in the County of Dimboola was proposed. It was first recognised as being a township when mentioned in the April 1863 edition of the ''Government Gazette''. Before the arrival of white people into the district, the Aborigines called the area Watchegatcheca which had the meaning 'Wattle Tree and White Cockatoos'. The name 'Dimboola' has generally been accepted to have come from the Sinhalese language, Sinhalese word "dimbula" meaning 'Land of Figs'. The name came from the District Surveyor of the time J.G.W. Wilmot, John George Winchester Wilmot, who had previously lived in Ceylon (now Sri Lanka). The relationship of the name to this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trams In Adelaide
Until 1958, trams formed a network spanning most of Adelaide, with a history dating back to 1878. Adelaide ran horse trams from 1878 to 1914 and electric trams from 1909, but has primarily relied on buses for public transport since the mid-20th century. Electric trams, and later trolleybuses, were Adelaide's main method of public transport throughout the life of the electric tram network. The tram network was progressively closed down through the 1950s with the last lines closing in 1958; the Glenelg tram line was the only line to survive these closures and has remained in operation ever since and has been progressively upgraded and extended since 2005. History Adelaide's first tramway was opened in 1878; a succession of horse-drawn services followed until in 1907 the South Australian Government established the Municipal Tramways Trust (MTT), which bought out their private-sector owners. A year later the MTT operated its first electric tram and before long the entire network wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephony
Telephony ( ) is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone. Telephony is commonly referred to as the construction or operation of telephones and telephonic systems and as a system of telecommunications in which telephonic equipment is employed in the transmission of speech or other sound between points, with or without the use of wires. The term is also used frequently to refer to computer hardware, software, and computer network systems, that perform functions traditionally performed by telephone equipment. In this context the technology is specifically referred to as Internet telephony, or voice over Internet Protocol (VoIP). Overview The first telephones were connected directly in pairs. Each user had a separate telephone wired ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Typewriter
A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element. At the end of the nineteenth century, the term 'typewriter' was also applied to a ''person'' who used such a device. The first commercial typewriters were introduced in 1874, but did not become common in offices until after the mid-1880s. The typewriter quickly became an indispensable tool for practically all writing other than personal handwritten correspondence. It was widely used by professional writers, in offices, business correspondence in private homes, and by students preparing written assignments. Typewriters were a standard fixture in most offices up to the 1980s. Thereafter, they began to be largely supplanted by personal computers running word processing software. Nevertheless, typewr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland
) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of Queensland , established_title2 = Separation from New South Wales , established_date2 = 6 June 1859 , established_title3 = Federation , established_date3 = 1 January 1901 , named_for = Queen Victoria , demonym = , capital = Brisbane , largest_city = capital , coordinates = , admin_center_type = Administration , admin_center = 77 local government areas , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 = Jeannette Young , leader_title3 = Premier , leader_name3 = Annastacia Palaszczuk ( ALP) , legislature = Parliament of Queensland , judiciary = Supreme Court of Queensland , national_representation = Parliament of Australia , national_representation_type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of the inventors of the telegraph. International Morse code encodes the 26 basic Latin letters through , one accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals ( prosigns). There is no distinction between upper and lower case letters. Each Morse code symbol is formed by a sequence of ''dits'' and ''dahs''. The ''dit'' duration is the basic unit of time measurement in Morse code transmission. The duration of a ''dah'' is three times the duration of a ''dit''. Each ''dit'' or ''dah'' within an encoded character is followed by a period of signal absence, called a ''space'', equal to the ''dit'' duration. The letters of a word are separated by a space of duration equal to three ''dits'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Pedals
The pedal is the part of a bicycle that the rider pushes with their foot to propel the vehicle. It provides the connection between the cyclist's foot or shoe and the crank allowing the leg to turn the bottom bracket spindle and propel the bicycle's wheels. A pedal usually consists of a spindle that threads into the end of the crank, and a body on which the foot rest is attached, that is free to rotate on bearings with respect to the spindle. Pedals were initially attached to cranks connecting directly to the driven (usually front) wheel. The safety bicycle, as it is known today, came into being when the pedals were attached to a crank driving a sprocket that transmitted power to the driven wheel by means of a roller chain. Types Just as bicycles come in many varieties, there are different types of pedals to support different types of cycling. Flat and platform Traditionally, platform pedals were pedals with a relatively large flat area for the foot to rest on, in contrast to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transceiver
In radio communication, a transceiver is an electronic device which is a combination of a radio ''trans''mitter and a re''ceiver'', hence the name. It can both transmit and receive radio waves using an antenna, for communication purposes. These two related functions are often combined in a single device to reduce manufacturing costs. The term is also used for other devices which can both transmit and receive through a communications channel, such as ''optical transceivers'' which transmit and receive light in optical fiber systems, and ''bus transceivers'' which transmit and receive digital data in computer data buses. Radio transceivers are widely used in wireless devices. One large use is in two-way radios, which are audio transceivers used for bidirectional person-to-person voice communication. Examples are cell phones, which transmit and receive the two sides of a phone conversation using radio waves to a cell tower, cordless phones in which both the phone handset and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half as many people as in Tasmania. The largest population center is the capital city of Darwin, Northern Territory, Darwin. The archaeological hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Flynn (minister)
John Flynn (25 November 18805 May 1951) was an Australian Presbyterian minister who founded the Australian Inland Mission (AIM) which later separated into Frontier Services and the Presbyterian Inland Mission, as well as founding what became the Royal Flying Doctor Service, the world's first air ambulance. Early life Educated at Snake Valley, Sunshine and Braybrook primary schools, he matriculated from University High School in Parkville in Melbourne, aged 18. Unable to finance a university course, he became a pupil-teacher with the Victorian Education Department and developed interests in photography and first aid. In 1903 he began training for the ministry through an extra-mural course for 'student lay pastors', serving meanwhile in pioneering districts of Beech Forest and Buchan. His next four years in theological college were interspersed with two periods on a shearers' mission and the publication of his Bushman's Companion (1910). Ministry Always thinking of the ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Flying Doctor Service Of Australia
The Royal Flying Doctor Service (RFDS), commonly known as the Flying Doctor, is an air medical service in Australia. It is a non-profit organisation that provides emergency and primary health care services for those living in rural, remote and regional areas of Australia who cannot access a hospital or general practice due to the vast distances of the Outback. It is one of the largest and most comprehensive aeromedical organisations in the world. History A "mantle of safety" for the Outback The Reverend John Flynn had worked in rural and remote areas of Victoria and was commissioned by the Presbyterian Church to look at the needs of people living in the outback. His report to the Presbyterian Assembly in 1912 resulted in the establishment of the Australian Inland Mission (AIM), of which he was appointed Superintendent. In 1928, he formed the AIM Aerial Medical Service, a one-year experiment based in Cloncurry, Queensland. This experiment later became The Royal Flying Doctor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Operator
A radio operator (also, formerly, wireless operator in British and Commonwealth English) is a person who is responsible for the operations of a radio system. The profession of radio operator has become largely obsolete with the automation of radio-based tasks in recent decades. Nevertheless, radio operators are still employed in maritime and aviation fields. In most cases radio transmission is now only one of several tasks of a radio operator. In the United States, the title of Certified Radio Operator is granted to those who pass a test issued by the Society of Broadcast Engineers. The role of 'Wireless Operator' aboard aircraft during WWII was often abbreviated to 'WOp' or 'WOP' in official documents or obituaries. See also * Wireless telegraphy * Wireless (other) Wireless refers to the transfer of information signals without using wires. The term may also refer to: Electronic communications * Wireless LAN, a wireless local-area computer network * Wirele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
