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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 used by both the School of the Air and by the Royal Flying Doctor Service. Early life and education Traeger was born at Glenlee, near Dimboola, Victoria, and raised near and in Adelaide, South Australia, the son of South Australian-born parents. His paternal grandparents had been German migrants to the young colony in 1848. Traeger attended Balaklava Public School, about north of Adelaide, then 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 and electrical engineering, earning an Associate Diploma. At the age of 12, he built a telephone from the farmhouse to a shed, making all of the c ... [...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, 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 Aboriginal people 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 word "dimbula" meaning 'Land of Figs'. The name came from the District Surveyor of the time John George Winchester Wilmot, who had previously lived in Ceylon (now Sri Lanka). The relationship of the name to this area is suggested to have come from 'Upper Regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trams In Adelaide
The Adelaide tramways network served much of the inner suburbs and several outer suburbs of Adelaide, Australia, from 1878 until soon after World War II, when it started to decline. The sole Glenelg tram line, Glenelg light rail line, which was the only route to survive the closures, did however remain in operation. After falling into a state of disrepair and neglect, in the 2000s the line underwent major civil engineering upgrades and, progressively, of route extensions; and received a new tram fleet. History Synopsis Adelaide's first, horse-drawn tramway was opened in 1878. A succession of 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 was powered by electricity. The early use of trams was for recreation as well as Commuting, daily travel, by entire families and tourists. Un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephony
Telephony ( ) is the field of technology involving the development, application, and deployment of telecommunications 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 wire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Typewriter
A typewriter is a Machine, mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of Button (control), keys, and each one causes a different single character to be produced on paper by striking an ink ribbon, inked ribbon selectively against the paper with a Sort (typesetting), type element. Thereby, the machine produces a legible written document composed of ink and paper. By the end of the 19th century, a ''person'' who used such a device was also referred to as a ''typewriter''. The first commercial typewriters were introduced in 1874, but did not become common in offices in the United States 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, in business correspondence in private homes, and by students preparing written assignments. Typewriters were a standard fixture in m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland
Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south, respectively. To the east, Queensland is bordered by the Coral Sea and the Pacific Ocean; to the state's north is the Torres Strait, separating the Australian mainland from Papua New Guinea, and the Gulf of Carpentaria to the north-west. With an area of , Queensland is the world's List of country subdivisions by area, sixth-largest subnational entity; it List of countries and dependencies by area, is larger than all but 16 countries. Due to its size, Queensland's geographical features and climates are diverse, and include tropical rainforests, rivers, coral reefs, mountain ranges and white sandy beaches in its Tropical climate, tropical and Humid subtropical climate, sub-tropical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a telecommunications method which Character encoding, encodes Written language, 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 early developers of the system adopted for electrical telegraphy. International Morse code encodes the 26 ISO basic Latin alphabet, basic Latin letters to , one Diacritic, accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals (Prosigns for Morse code, 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 can vary for signal clarity and operator skill, but for any one message, once the rhythm is established, a beat (music), half-beat is the basic unit of time measurement in Morse code. The duration of a ''dah'' is three times the duration ... [...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 hands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal 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 Northern Territory looks out to the Timor Sea, the Arafura Sea, and the Gulf of Carpentaria, including Western New Guinea and various 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 the population of Tasmania. The largest population centre is the capital city of Darw ... [...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 Flynn was born at Moliagul, central Victoria on 25 November, 1880. The third child of Thomas and Rosetta Flynn, John was raised in Sydney by his mother's sister after his mother died during childbirth. When he was five, John was reunited with his family at Snake Gully, near Ballarat. The Flynn family later moved to Sunshine in Melbourne's western suburbs. 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. ... [...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 Aeromedical retrieval, aeromedical retrieval service in Australia and the largest of its kind in the world. It is a non-profit organisation that provides urgent and emergency medical transport for patients in rural and remote areas of Australia who require transfer to a higher level of care (such as a tertiary referral hospital). RFDS also provides primary health care services such as general practice, mental health and Allied health professions, allied health to remote communities who would otherwise have limited access. The RFDS comprises six autonomous regional organisations (such as the RFDS Queensland Section) and a federation office in Canberra. History "Mantle of safety" John Flynn (minister), John Flynn had worked in rural and remote areas of Victoria, Australia, Victoria and was commissioned by the Presbyterian Church to look at the needs of people living in the outback. His report t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Operator
A radio operator (also, formerly, a wireless operator in British and Commonwealth English) is a person who is responsible for the operations of a radio system and the technicalities in broadcasting. 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 telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using electrical cable, cables. Before about 1910, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
