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Archaeology Of Shipwrecks
The archaeology of shipwrecks is the field of archaeology specialized most commonly in the study and exploration of shipwrecks. Its techniques combine those of archaeology with those of Underwater diving, diving to become Underwater archaeology. However, shipwrecks are discovered on what have become terrestrial sites. It is necessary to understand the processes and theories by which a wreck site is formed to take into account the distortions in the archaeological material caused by the filtering and scrambling of material remains that occurs during and after the wrecking process. Prior to being wrecked, the ship would have operated as an organised machine, and its crew, equipment, passengers and cargo need to be considered as a system. The material remains should provide clues to the functions of Seakeeping, seaworthiness, navigation and Marine propulsion, propulsion as well as to ship-board life. These clues can also infer how a ship functioned, in special regards to social, pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steady State
In systems theory, a system or a process is in a steady state if the variables (called state variables) which define the behavior of the system or the process are unchanging in time. In continuous time, this means that for those properties ''p'' of the system, the partial derivative with respect to time is zero and remains so: : \frac = 0 \quad \text t. In discrete time, it means that the first difference of each property is zero and remains so: : p_t-p_=0 \quad \text t. The concept of a steady state has relevance in many fields, in particular thermodynamics, economics, and engineering. If a system is in a steady state, then the recently observed behavior of the system will continue into the future. In stochastic systems, the probabilities that various states will be repeated will remain constant. For example, see ' for the derivation of the steady state. In many systems, a steady state is not achieved until some time after the system is started or initiated. This initial sit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen Anne's Revenge
''Queen Anne's Revenge'' was an early-18th-century ship, most famously used as a flagship by Edward Teach, better known by his nickname Blackbeard. The date and place of the ship's construction are uncertain, and there is no record of its actions prior to 1710 when it was operating as a French privateer as ''La Concorde''. Surviving features of the ship's construction strongly suggest it was built by French shipwrights, based on differences in fastening patterns in the late 17th and early 18th centuries. After several years of French service, both as a naval frigate and as a merchant vessel – much of that time as a slave ship – she was captured by Blackbeard in 1717. Blackbeard used the ship for less than a year, but captured numerous prize (law), prizes using her as his flagship. In May 1718, Blackbeard ran the ship aground at Topsail Inlet, now known as Beaufort, North Carolina, Beaufort Inlet, North Carolina, United States, in present-day Carteret County, North Carolina, C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Videography
Underwater videography is the branch of electronic underwater photography concerned with capturing underwater moving images as a recreational diving, scientific, commercial, documentary, or filmmaking activity. Although technological changes since 1909 have improved the ease of operation and quality of images, significant challenges in the form of protecting equipment from water, low light levels, and the usual hazards of diving must be addressed. History In 1909, Albert Samama Chikly took the first underwater shot. In 1910, he filmed Tuna fishing in Tunisia under the patronage of Albert I, Prince of Monaco. In 1940 Hans Hass completed ''Pirsch unter Wasser'' (i.e. ''Stalking under Water'') which was published by the Universum Film AG, lasted originally only 16 minutes and was shown in theatres before the main movie, but would eventually be extended by additional filming done in the Adriatic Sea close to Dubrovnik. It premiered in Berlin in 1942. ''Sesto Continente'' directed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Journal
An academic journal (or scholarly journal or scientific journal) is a periodical publication in which Scholarly method, scholarship relating to a particular academic discipline is published. They serve as permanent and transparent forums for the dissemination, scrutiny, and discussion of research. Unlike professional magazines or Trade magazine, trade magazines, the articles are mostly written by researchers rather than staff writers employed by the journal. They nearly universally require peer review for Research Article, research articles or other scrutiny from contemporaries competent and established in their respective fields. Academic journals trace their origins back to the 17th century. , it is estimated that over 28,100 active academic journals are in publication, with scopes ranging from the general sciences, as seen in journals like ''Science (journal), Science'' and ''Nature (journal), Nature'', to highly specialized fields. These journals publish a variety of articles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florida
Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic Ocean to the east, the Straits of Florida to the south, and The Bahamas to the southeast. About two-thirds of Florida occupies a peninsula between the Gulf of Mexico and the Atlantic Ocean. It has the List of U.S. states by coastline, longest coastline in the contiguous United States, spanning approximately , not including its many barrier islands. It is the only state that borders both the Gulf of Mexico and the Atlantic Ocean. With a population of over 23 million, it is the List of U.S. states and territories by population, third-most populous state in the United States and ranks List of states and territories of the United States by population density, seventh in population density as of 2020. Florida spans , ranking List of U.S. states ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Reefs
An artificial reef (AR) is a human-created freshwater or marine benthic structure. Typically built in areas with a generally featureless bottom to promote Marine biology#Reefs, marine life, it may be intended to control #Erosion prevention, erosion, protect coastal areas, block ship passage, block the use of trawling nets, support reef restoration, improve aquaculture, or enhance scuba diving and surfing. Early artificial reefs were built by the Persians and the Romans. An opportunity artificial reef is built from objects that were intended for other purposes, such as sinking oil rigs (through the Rigs-to-Reefs program), Sinking ships for wreck diving sites, scuttling ships, or by deploying rubble or construction debris. Shipwrecks may become artificial reefs when preserved on the seafloor. A conventional artificial reef uses materials such as concrete, which can be molded into specialized forms (e.g. The Reef Ball Foundation, reef balls). Green artificial reefs incorporate renewab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florida Public Archaeology Network
The Florida Public Archaeology Network, or FPAN, is a state supported organization of regional centers dedicated to public outreach and assisting Florida municipalities and the Florida Division of Historical Resources "to promote the stewardship and protection of Florida's archaeological resources."Florida Public Archaeology Network – FAQ page FPAN was established in 2004, upon legislation that sought to establish a "Florida network of public archaeology centers to help stem the rapid deterioration of this state's buried past and to expand public interest in ." [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the world's largest brackish water basin. The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. It is a Continental shelf#Shelf seas, shelf sea and marginal sea of the Atlantic with limited water exchange between the two, making it an inland sea. The Baltic Sea drains through the Danish straits into the Kattegat by way of the Øresund, Great Belt and Little Belt. It includes the Gulf of Bothnia (divided into the Bothnian Bay and the Bothnian Sea), the Gulf of Finland, the Gulf of Riga and the Bay of Gdańsk. The "Baltic Proper" is bordered on its northern edge, at latitude 60°N, by Åland and the Gulf of Bothnia, on its northeastern edge by the Gulf of Finland, on its eastern edge by the Gulf of Riga, and in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Lakes
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, Huron, Lake Erie, Erie, and Lake Ontario, Ontario (though hydrologically, Lake Michigan–Huron, Michigan and Huron are a single body of water, joined at the Straits of Mackinac). The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect to the Atlantic Ocean via the Saint Lawrence River, and to the Mississippi River basin through the Illinois Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total area and the second-largest by total volume. They contain 21% of the world's surface fresh water by volume. The total surface is , and the total volume (measured at the low water datum) is , slightly less than the volume of Lake Baikal (, 22–23% of the world's surface f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shipworm
The shipworms, also called teredo worms or simply teredo (, via Latin ), are marine bivalve molluscs in the family Teredinidae, a group of saltwater clams with long, soft, naked bodies. They are notorious for boring into (and commonly eventually destroying) wood that is immersed in seawater, including such structures as wooden piers, docks, and ships; they drill passages by means of a pair of very small shells (" valves") borne at one end, with which they rasp their way through. They are sometimes called "termites of the sea". Carl Linnaeus assigned the common name '' Teredo'' to the best-known genus of shipworms in the 10th edition of his taxonomic ''magnum opus'', '' Systema Naturæ'' (1758). Characteristics Removed from its burrow, the fully grown teredo ranges from several centimeters to about a meter in length, depending on the species. An average adult shipworm measures in length and less than in diameter, but some species grow to considerable size. The body is c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Vasa From The Bow
''The'' is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pronoun ''thee' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
