|
Time Signal
A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Church bells or voices announcing hours of prayer gave way to automatically operated chimes on public clocks; however, audible signals (even signal guns) have limited range. Busy seaports used a visual signal, the dropping of a ball, to allow mariners to check the chronometers used for navigation. The advent of electrical telegraphs allowed widespread and precise distribution of time signals from central observatories. Railways were among the first customers for time signals, which allowed synchronization of their operations over wide geographic areas. Dedicated radio time signal stations transmit a signal that allows automatic synchronization of clocks, and commercial broadcasters still include time signals in their programming. Today, global navigation satellite systems (GNSS) radio signals are used to precisely distribute time signals over much of the world ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Clocks-1905
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with three spatial dimensions. Time has long been an important subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. 108 pages. Time in physics is operationally defined as "what a clock reads". The physical nature of time is addressed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaport
A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as Hamburg, Manchester and Duluth; these access the sea via rivers or canals. Because of their roles as ports of entry for immigrants as well as soldiers in wartime, many port cities have experienced dramatic multi-ethnic and multicultural changes throughout their histories. Ports are extremely important to the global economy; 70% of global merchandise trade by value passes through a port. For this reason, ports are also often densely populated settlements that provide the labor for processing and handling goods and related services for the ports. Today by far the greatest growth in port development is in Asia, the continent with some of the world's largest and busiest ports, such as Singapore and the Chinese ports of Shanghai and Ningbo-Zhou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Hill (Cape Town)
Signal Hill ( af, Seinheuwel), or Lion's Rump, is a landmark flat-topped hill located in Cape Town, next to Lion's Head and Table Mountain. The hill was also known as "The Lion's Flank", a term now obsolete. Together with Lion's Head, Signal Hill looks like a lion sphinx. Signals Signal flags were used to communicate weather warnings as well as anchoring instructions to visiting ships in order to ensure that they prepared adequately for stormy weather while in the bay. Similarly, ships could use flags to signal for assistance if, for example, an anchor line parted during a storm. It is known for the Noon Gun that is operated there by the South African Navy and South African Astronomical Observatory. In 1836, a time ball was set up at the Cape Town observatory, however it was not visible to ships in the harbour, so a second time ball was erected on Signal Hill in order to relay the precise moment of 1pm Cape Mean Time. In this way ships in the bay were able to check their m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Town
Cape Town ( af, Kaapstad; , xh, iKapa) is one of South Africa's three capital cities, serving as the seat of the Parliament of South Africa. It is the legislative capital of the country, the oldest city in the country, and the second largest (after Johannesburg). Colloquially named the ''Mother City'', it is the largest city of the Western Cape province, and is managed by the City of Cape Town metropolitan municipality. The other two capitals are Pretoria, the executive capital, located in Gauteng, where the Presidency is based, and Bloemfontein, the judicial capital in the Free State, where the Supreme Court of Appeal is located. Cape Town is ranked as a Beta world city by the Globalization and World Cities Research Network. The city is known for its harbour, for its natural setting in the Cape Floristic Region, and for landmarks such as Table Mountain and Cape Point. Cape Town is home to 66% of the Western Cape's population. In 2014, Cape Town was named the best place ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noon Gun
The Noon Gun has been a historic time signal in Cape Town, South Africa since 1806. It consists of a pair of black powder Dutch naval guns, fired alternatingly with one serving as a backup. The guns are situated on Signal Hill, close to the centre of the city. History The settlement at the Cape of Good Hope was founded by the Dutch in 1652 and the signal guns were originally part of the regular artillery at the Imhoff Battery at the Castle in Cape Town. The guns, which are still in use today, are 18 pounder smooth bore muzzle loading guns, and were designed by captain Thomas Blomfield in 1786. They were cast by Walker & Co. in early 1794, and proof fired at Woolwich in June 1794. After this type of gun was adopted by the Royal Navy as their standard naval gun, the Noon Guns were brought to Cape Town during the 1795 occupation. In 1795 during the Napoleonic Wars, Britain took the Cape Colony from the Dutch East India Company (''(De) Vereenigde Oostindische Compagnie (VO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Hill, St
In signal processing, a signal is a function that conveys information about a phenomenon. Any quantity that can vary over space or time can be used as a signal to share messages between observers. The ''IEEE Transactions on Signal Processing'' includes audio, video, speech, image, sonar, and radar as examples of signal. A signal may also be defined as observable change in a quantity over space or time (a time series), even if it does not carry information. In nature, signals can be actions done by an organism to alert other organisms, ranging from the release of plant chemicals to warn nearby plants of a predator, to sounds or motions made by animals to alert other animals of food. Signaling occurs in all organisms even at cellular levels, with cell signaling. Signaling theory, in evolutionary biology, proposes that a substantial driver for evolution is the ability of animals to communicate with each other by developing ways of signaling. In human engineering, signals are typi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Citadelle Of Quebec
The Citadelle of Quebec (french: Citadelle de Québec), also known as ''La Citadelle'', is an active military installation and the secondary official residence of both the Canadian monarch and the governor general of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City, Quebec. The citadel contains the oldest military building in Canada, and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico. The strategic importance of Cap Diamant was recognized by the French as early as 1608. Several defensive fortifications were built on the site first by the French, and then by the British after their conquest of New France. The modern citadel was built from 1820 to 1850, in effort to secure Quebec City against a potential American attack. The British used the citadel until 1871, when they formally handed the property over to the Canadian governm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Citadel Hill (Fort George)
Citadel Hill is a hill that is a National Historic Site in Halifax, Nova Scotia, Canada. Four fortifications have been constructed on Citadel Hill since the city was founded by the English in 1749, and were referred to as Fort George—but only the third fort (built between 1794 and 1800) was officially named Fort George. According to General Orders of October 20, 1798, it was named after King George III. The first two and the fourth and current fort, were officially called the Halifax Citadel. The last is a concrete star fort. The Citadel is the fortified summit of Citadel Hill. The hill was first fortified in 1749, the year that Edward Cornwallis oversaw the development of the town of Halifax. Those fortifications were successively rebuilt to defend the town from various enemies. Construction and leveling have lowered the summit by ten to twelve metres. While never attacked, the Citadel was long the keystone to defence of the strategically important Halifax Harbour and its Roy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brockton Point
Brockton Point is a headland off the Downtown Peninsula of Vancouver, on the north side of Coal Harbour. Named after Francis Brockton, it is the most easterly part of Stanley Park and is home to Brockton Point Lighthouse, a 100-year-old lighthouse and several hand-carved totem poles made in British Columbia. Like the rest of Stanley Park coastline, Brockton Point is lined by the Vancouver Seawall. Part of the land at the point was first cleared in 1865 in order to construct a sawmill. Due to rough currents around the point and a reef offshore, the Burnaby Shoal, however, the mill was built in Gastown and the point instead became the primary sports fields of early Vancouver. The main sporting venue, Brockton Oval, has been visited by cricket players such as Donald Bradman, Fred Trueman and Geoffrey Boycott. Cricket and rugby football are still played here. History Before 1865, the point was utilized as a graveyard for early settlers who came to Vancouver. That year, Edward Stamp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishermen
A fisher or fisherman is someone who captures fish and other animals from a body of water, or gathers shellfish. Worldwide, there are about 38 million commercial and subsistence fishers and fish farmers. Fishers may be professional or recreational. Fishing has existed as a means of obtaining food since the Mesolithic period.Profile for the USA * inadequate preparation for emergencies * poor vessel maintenance and inadequate safety equipment * lack of awareness of or ignoring stability issues. Many fishers, while accepting that fishing is dangerous, staunchly defend their independence. Many proposed laws and additional regulation to increase safety have been defeated because fishers oppose them. Alaska's commercial fishers work in one of the world's harshest environments. Many of the hardships they endure include isolated fishing grounds, high winds, seasonal darkness, very cold water, icing, and short fishing seasons, where very long work days are the norm. Fatigue, physical s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fisheries And Oceans Canada
Fisheries and Oceans Canada (DFO; french: Pêches et Océans Canada, MPO), is a department of the Government of Canada that is responsible for developing and implementing policies and programs in support of Canada's economic, ecological and scientific interests in oceans and inland waters. Its mandate includes responsibility for the conservation and sustainable use of Canada's fisheries resources while continuing to provide safe, effective and environmentally sound marine services that are responsive to the needs of Canadians in a global economy. The federal government is constitutionally mandated for conservation and protection of fisheries resources in all Canadian fisheries waters. However, the department is largely focused on the conservation and allotment of harvests of salt water fisheries on the Atlantic, Pacific and Arctic coasts of Canada. The department works toward conservation and protection of inland freshwater fisheries, such as on the Great Lakes and Lake Winni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanley Park
Stanley Park is a public park in British Columbia, Canada that makes up the northwestern half of Vancouver's Downtown Peninsula, surrounded by waters of Burrard Inlet and English Bay. The park borders the neighbourhoods of West End and Coal Harbour to its southeast, and is connected to the North Shore via the Lions Gate Bridge. The historic lighthouse on Brockton Point marks the park's easternmost point. While it is not the largest of its kind, Stanley Park is about one-fifth larger than New York City's Central Park and almost half the size of London's Richmond Park. Stanley Park has a long history. The land was originally used by Indigenous peoples for thousands of years before British Columbia was colonized by the British during the 1858 Fraser Canyon Gold Rush and was one of the first areas to be explored in the city. For many years after colonization, the future park with its abundant resources would also be home to non-Indigenous settlers. The land was later turned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_-_1.JPG "Click for more on -> Brockton Point")
