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Earthquake Network
Earthquake Network research project that aims to develop and maintain a Crowdsourcing, crowdsourced smartphone-based earthquake warning system at a global level. The system uses the on-board accelerometers in privately-owned smartphones of volunteer participants to detect earthquake waves (rather than conventional seismometers). When it detects an earthquake, it issues an earthquake warning to alert people who the damaging waves of the earthquake have not yet reached. The project started on January 1, 2013 with the release of the homonymous Android (operating system), Android application Earthquake Network. The author of the research project and developer of the smartphone application is Francesco Finazzi of the University of Bergamo, Italy. Scientific research Earthquake warning systems strive to rapidly detect earthquakes and alert the population in advance. When the system detects an earthquake, a potentially large number of people in affected locations not too close to the ep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Advertising
Mobile advertising is a form of advertising via mobile (wireless) phones or other mobile devices. It is a subset of mobile marketing, mobile advertising can take place as text ads via SMS, or banner advertisements that appear embedded in a mobile web site. It is estimated that U.S. mobile app-installed ads accounted for 30% of all mobile advertising revenue in 2014, and will top $4.6 billion in 2016, and over $6.8 billion by the end of 2019. Other ways mobile advertising can be purchased include working with a Mobile Demand Side Platform, in which ad impressions are bought in real-time on an Ad exchange. Another report has indicated that worldwide mobile digital advertising spend would reach $185 billion in 2018, $217 billion in 2019 and $247 billion in 2020. Overview Some see mobile advertising as closely related to online or internet advertising, though its reach is far greater — currently, most mobile advertising is targeted at mobile phones, that came at an estimated g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often says "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturate—that is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the U.S. Geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Scale
Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location. Magnitudes are usually determined from measurements of an earthquake's seismic waves as recorded on a seismogram. Magnitude scales vary on what aspect of the seismic waves are measured and how they are measured. Different magnitude scales are necessary because of differences in earthquakes, the information available, and the purposes for which the magnitudes are used. Earthquake magnitude and ground-shaking intensity The Earth's crust is stressed by tectonic forces. When this stress becomes great enough to rupture the crust, or to overcome the friction that prevents one block of crust from slipping past another, energy is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calibration
In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, a sound tone, or a physical artifact, such as a meter ruler. The outcome of the comparison can result in one of the following: * no significant error being noted on the device under test * a significant error being noted but no adjustment made * an adjustment made to correct the error to an acceptable level Strictly speaking, the term "calibration" means just the act of comparison and does not include any subsequent adjustment. The calibration standard is normally traceable to a national or international standard held by a metrology body. BIPM Definition The formal definition of calibration by the International Bureau of Weights and Measures (BIPM) is the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Ground Acceleration
Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an wikt:accelerogram, accelerogram at a site during a particular earthquake. Earthquake shaking generally occurs in all three directions. Therefore, PGA is often split into the horizontal and vertical components. Horizontal PGAs are generally larger than those in the vertical direction but this is not always true, especially close to large earthquakes. PGA is an important parameter (also known as an intensity measure) for earthquake engineering, The design basis earthquake ground motion (DBEGM) is often defined in terms of PGA. Unlike the Richter magnitude scale, Richter and Moment magnitude scale, moment magnitude scales, it is not a measure of the total seismic scales#Magnitude and intensity, energy (magnitude, or size) of an earthquake, but rather of how hard the earth shake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletin Of The Seismological Society Of America
''Bulletin of the Seismological Society of America'' (BSSA) is a bimonthly peer reviewed scientific journal published by the Seismological Society of America. The editor-in-chief is Thomas Pratt ( U. S. Geological Survey). The journal covers seismology and related disciplines. Topical coverage includes theory and observation of seismic waves, specific earthquakes, the structure of the Earth, earthquake sources, hazard and risk estimation, and earthquake engineering. Publishing formats include regular papers and short notes. Publication has been continuous since 1911. Abstracting and indexing This journal is indexed by the following services:Hollis Classic Library Harvard College. 2009 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Real-time
Real-time computing (RTC) is the computer science term for hardware and software systems subject to a "real-time constraint", for example from event to system response. Real-time programs must guarantee response within specified time constraints, often referred to as "deadlines". Ben-Ari, Mordechai; "Principles of Concurrent and Distributed Programming", ch. 16, Prentice Hall, 1990, , page 164 Real-time responses are often understood to be in the order of milliseconds, and sometimes microseconds. A system not specified as operating in real time cannot usually ''guarantee'' a response within any timeframe, although ''typical'' or ''expected'' response times may be given. Real-time processing ''fails'' if not completed within a specified deadline relative to an event; deadlines must always be met, regardless of system load. A real-time system has been described as one which "controls an environment by receiving data, processing them, and returning the results sufficiently quic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendoza, Argentina
Mendoza (, ), officially the City of Mendoza ( es, Ciudad de Mendoza) is the capital of the province of Mendoza in Argentina. It is located in the northern-central part of the province, in a region of foothills and high plains, on the eastern side of the Andes. As of the , Mendoza had a population of 115,041 with a metropolitan population of 1,055,679, making Greater Mendoza the fourth largest census metropolitan area in the country. Ruta Nacional 7, the major road running between Buenos Aires and Santiago, runs through Mendoza. The city is a frequent stopover for climbers on their way to Aconcagua (the highest mountain in the Western and Southern Hemispheres) and for adventure travelers interested in mountaineering, hiking, horse riding, rafting, and other sports. In the winter, skiers come to the city for easy access to the Andes. Two of the main industries of the Mendoza area are olive oil production and Argentine wine. The region around Greater Mendoza is the largest win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago
Santiago (, ; ), also known as Santiago de Chile, is the capital and largest city of Chile as well as one of the largest cities in the Americas. It is the center of Chile's most densely populated region, the Santiago Metropolitan Region, whose total population is 8 million which is nearly 40% of the country's population, of which more than 6 million live in the city's continuous urban area. The city is entirely in the country's central valley. Most of the city lies between above mean sea level. Founded in 1541 by the Spanish conquistador Pedro de Valdivia, Santiago has been the capital city of Chile since colonial times. The city has a downtown core of 19th-century neoclassical architecture and winding side-streets, dotted by art deco, neo-gothic, and other styles. Santiago's cityscape is shaped by several stand-alone hills and the fast-flowing Mapocho River, lined by parks such as Parque Forestal and Balmaceda Park. The Andes Mountains can be seen from most points ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valparaíso
Valparaíso (; ) is a major city, seaport, naval base, and educational centre in the commune of Valparaíso, Chile. "Greater Valparaíso" is the second largest metropolitan area in the country. Valparaíso is located about northwest of Santiago by road and is one of the Pacific Ocean's most important seaports. Valparaíso is the Capital city, capital of Chile's second most populated administrative region and has been the headquarters for the Chilean Navy since 1817 and the seat of the National Congress of Chile, Chilean National Congress since 1990. Valparaíso played an important geopolitical role in the second half of the 19th century when it served as a major stopover for ships traveling between the Atlantic and Pacific oceans by crossing the Straits of Magellan. Valparaíso experienced rapid growth during its golden age, as a magnet for European immigrants, when the city was known by international sailors as "Little San Francisco" and "The Jewel of the Pacific". Notable inhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2015 Illapel Earthquake
The 2015 Illapel earthquake occurred offshore from Illapel ( Coquimbo region, Chile) on September 16 at 19:54:32 Chile Standard Time (22:54:32 UTC), with a moment magnitude of 8.3–8.4. The initial quake lasted between three and five minutes; it was followed by several aftershocks greater than magnitude six and two that exceeded 7.0 moment magnitude. The Chilean government reported 15 deaths, 6 missing and thousands of people affected. In Buenos Aires, Argentina, a man died from a stroke while he was evacuating a building. Earthquake The earthquake occurred on thrust faults along the boundary of the Nazca and South American plates. The region frequently produces large earthquakes, and 15 others of magnitude 7 or higher have taken place within 400 km of the epicenter over the past 100 years. The last big quake that occurred in this region was the 1943 Ovalle earthquake, reaching a magnitude in the range 7.9–8.2; however, comparisons of the associated source ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago And Valparaiso
Santiago (, ; ), also known as Santiago de Chile, is the capital and largest city of Chile as well as one of the largest cities in the Americas. It is the center of Chile's most densely populated region, the Santiago Metropolitan Region, whose total population is 8 million which is nearly 40% of the country's population, of which more than 6 million live in the city's continuous urban area. The city is entirely in the country's central valley. Most of the city lies between above mean sea level. Founded in 1541 by the Spanish conquistador Pedro de Valdivia, Santiago has been the capital city of Chile since colonial times. The city has a downtown core of 19th-century neoclassical architecture and winding side-streets, dotted by art deco, neo-gothic, and other styles. Santiago's cityscape is shaped by several stand-alone hills and the fast-flowing Mapocho River, lined by parks such as Parque Forestal and Balmaceda Park. The Andes Mountains can be seen from most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
