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Blue Light Signal
Blue light is an archaic signal, the progenitor of modern pyrotechnic flares. Blue light consists of a loose, chemical composition burned in an open, hand-held hemispherical wooden cup, and so is more akin to the flashpan signals of the Admiral Nelson era than the modern, encased signal flares, which are often launched by mortar or rifle and suspended by parachute. Widely used during the eighteenth and nineteenth centuries for signaling by the world's military forces, and for general illumination in the civilian sector, blue light was remarkable for its use of poisonous arsenic compounds (realgar and orpiment), which contributed to its replacement by safer flares in the early twentieth century. Confusion with blue-colored lanterns Blue light was famously mentioned in accounts of the '' H.L. Hunley'', the Confederate submarine which became the first to sink an enemy vessel, the , on February 17, 1864, during the Civil War. Such blue light has been repeatedly misidentified by author ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Light
Blue Light or Blue light may refer to: Science and technology * Portion of the visible spectrum related to the blue color ** Blue laser ** Blue LED * Cherenkov radiation, the physical phenomenon responsible for the characteristic blue glow in nuclear reactors * Blue light (pyrotechnic signal), a firework composition used for night-time signaling and illumination * Biological effects of high-energy visible light Military * Blue Light (counter-terrorist subunit), a 1970s US counter-terrorist subunit of the United States Army's 5th Special Forces Group Emergency services * Blue lights, also known as blues and twos services, British emergency services * Blue lights, emergency telephone systems meant to deter crime, specially designed for use on campuses Arts, entertainment and media Film and television * ''The Blue Light'' (1932 film), a 1932 film directed by Leni Riefenstahl * ''The Blue Light'' (2003 film), a 2003 Japanese film directed by Yukio Ninagawa * ''Blue Light' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warren Lasch Conservation Center
The Charleston Innovation Campus is a branch campus of Clemson University, located at the former Charleston Navy Yard in North Charleston, South Carolina. It was established in 2004, and houses the Warren Lasch Conservation Center, Dominion Energy Innovation Center, and the Zucker Family Graduate Education Center. Warren Lasch Conservation Center The Warren Lasch Conservation Center was established in 2000 for the conservation and restoration of the submarine ''H.L. Hunley''. The namesake of the building is Warren F. Lasch, who was chairman of Friends of the Hunley during the ''Hunley'''s recovery. The ''Hunley'' is housed in a specially designed tank of sodium hydroxide. The center became part of Clemson in 2004, and its scope expanded into research of various metal and architectural conservation topics. Dominion Energy Innovation Center The Energy Innovation center opened in 2013 with the help of a $45 million grant from the U.S. Department of Energy. The center house ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emergency Communication
An emergency is an urgent, unexpected, and usually dangerous situation that poses an immediate risk to health, life, property, or environment and requires immediate action. Most emergencies require urgent intervention to prevent a worsening of the situation, although in some situations, mitigation may not be possible and agencies may only be able to offer palliative care for the aftermath. While some emergencies are self-evident (such as a natural disaster that threatens many lives), many smaller incidents require that an observer (or affected party) decide whether it qualifies as an emergency. The precise definition of an emergency, the agencies involved and the procedures used, vary by jurisdiction, and this is usually set by the government, whose agencies ( emergency services) are responsible for emergency planning and management. Defining an emergency An incident, to be an emergency, conforms to one or more of the following, if it: * Poses an immediate threat to life, h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighting
Lighting or illumination is the deliberate use of light to achieve practical or aesthetic effects. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (architecture), Daylighting (using windows, skylights, or Architectural light shelf, light shelves) is sometimes used as the main source of light during daytime in buildings. This can save energy in place of using artificial lighting, which represents a major component of energy consumption in buildings. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design. Lighting can also be an intrinsic component of landscaping, landscape projects. History With the Control of fire by early humans, discovery of fire, the earliest form of artificial lighting used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stonewall Jackson's Way
"Stonewall Jackson's Way" is a poem penned during the American Civil War that later became a well-known patriotic song of the Confederate States and the Southern United States. It became very popular, but its authorship was unknown until almost 25 years later. The poem honors the famed Confederate Army officer Lieutenant General Thomas J. "Stonewall" Jackson, and was written by John Williamson Palmer (1825–1906), who stated that he had written the ballad on September 16, 1862; however, Miller & Beacham, who published the song in 1862, stated that the song was found on the body of a Confederate sergeant after the First Battle of Winchester, May 25, 1862. It is possible this alternative origin story was concocted to prevent Palmer, from Baltimore, from being arrested as a Confederate sympathizer. The Ballad Index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shelby Foote, The Civil War
Shelby may refer to: Places United States * Shelby, Alabama, a census-designated place and unincorporated community * Shelby, Indiana, an unincorporated town * Shelby, Iowa, a city * Shelby, Oceana County, Michigan, a village * Shelby, Mississippi, a city * Shelby, Missouri, an unincorporated community * Shelby, Montana, a city * Shelby, Nebraska, a village * Shelby, New York, a town * Shelby, North Carolina, a small city * Shelby, Ohio, a city * Shelby, Texas, an unincorporated town * Shelby, Virginia, an unincorporated community * Shelby, Wisconsin, a town ** Shelby (community), Wisconsin, an unincorporated community * Camp Shelby, a military post adjacent to Hattiesburg, Mississippi * Fort Shelby (Michigan), a military fort in Detroit, in use from 1779 to 1826 * Fort Shelby (Wisconsin), an American military installation built in 1814 and destroyed by the British in 1815 * Shelby County (other) * Shelby Township (other) Elsewhere * Mount Shelby, a mountain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stonewall Jackson
Thomas Jonathan "Stonewall" Jackson (January 21, 1824 – May 10, 1863) was a Confederate general and military officer who served during the American Civil War. He played a prominent role in nearly all military engagements in the eastern theater of the war until his death. Military historians regard him as one of the most gifted tactical commanders in U.S. history. Born in what was then part of Virginia (now in West Virginia), Jackson received an appointment to the United States Military Academy, graduating in the class of 1846. He served in the United States Army during the Mexican–American War, distinguishing himself at the Battle of Chapultepec. From 1851 to 1861, he taught at the Virginia Military Institute. When Virginia seceded from the United States in May 1861 after the Battle of Fort Sumter, Jackson joined the Confederate States Army. He distinguished himself commanding a brigade at the First Battle of Bull Run in July, providing crucial reinforcements and bea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christianity
Christianity is an Abrahamic monotheistic religion, which states that Jesus in Christianity, Jesus is the Son of God (Christianity), Son of God and Resurrection of Jesus, rose from the dead after his Crucifixion of Jesus, crucifixion, whose coming as the Messiah#Christianity, messiah (Christ (title), Christ) was Old Testament messianic prophecies quoted in the New Testament, prophesied in the Old Testament and chronicled in the New Testament. It is the Major religious groups, world's largest and most widespread religion with over 2.3 billion followers, comprising around 28.8% of the world population. Its adherents, known as Christians, are estimated to make up a majority of the population in Christianity by country, 157 countries and territories. Christianity remains Christian culture, culturally diverse in its Western Christianity, Western and Eastern Christianity, Eastern branches, and doctrinally diverse concerning Justification (theology), justification and the natur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Of Wales
Prince of Wales (, ; ) is a title traditionally given to the male heir apparent to the History of the English monarchy, English, and later, the British throne. The title originated with the Welsh rulers of Kingdom of Gwynedd, Gwynedd who, from the late 12th century, used it (albeit inconsistently) to assert their supremacy over the other Welsh rulers. However, to mark the finalisation of his conquest of Wales, in 1301, Edward I of England invested his son Edward of Caernarfon with the title, thereby beginning the tradition of giving the title to the heir apparent when he was the monarch's son or grandson. The title was later claimed by the leader of a Welsh Revolt, Welsh rebellion, Owain Glyndŵr, from 1400 until 1415. King Charles III created his son William, Prince of Wales, William Prince of Wales on 9 September 2022, the day after his accession to the throne, with formal letters patent issued on 13 February 2023. The title has become a point of controversy in Wales. Welsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the south and west by the Pacific Ocean. The region includes Middle America (Americas), Middle America (comprising the Caribbean, Central America, and Mexico) and Northern America. North America covers an area of about , representing approximately 16.5% of Earth's land area and 4.8% of its total surface area. It is the third-largest continent by size after Asia and Africa, and the list of continents and continental subregions by population, fourth-largest continent by population after Asia, Africa, and Europe. , North America's population was estimated as over 592 million people in list of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's popula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niagara Falls
Niagara Falls is a group of three waterfalls at the southern end of Niagara Gorge, spanning the Canada–United States border, border between the Provinces and territories of Canada, province of Ontario in Canada and the state of New York (state), New York in the United States. The largest of the three is Horseshoe Falls, which straddles the Canada–United States border, international border of the two countries. It is also known as the Canadian Falls. The smaller American Falls and Bridal Veil Falls (Niagara Falls), Bridal Veil Falls lie within the United States. Bridal Veil Falls is separated from Horseshoe Falls by Goat Island (New York), Goat Island and from American Falls by Luna Island, with both islands situated in New York. Formed by the Niagara River, which drains Lake Erie into Lake Ontario before flowing out to the Atlantic Ocean through the St. Lawrence River, the combined falls have the List of waterfalls by flow rate, highest flow rate of any waterfall in North ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fireworks
Fireworks are Explosive, low explosive Pyrotechnics, pyrotechnic devices used for aesthetic and entertainment purposes. They are most commonly used in fireworks displays (also called a fireworks show or pyrotechnics), combining a large number of devices in an outdoor setting. Such displays are the focal point of many cultural and religious Celebration (party), celebrations, though mismanagement could lead to List of fireworks accidents and incidents, fireworks accidents. Fireworks take many forms to produce four primary effects: noise, light, smoke, and floating materials (confetti most notably). They may be designed to burn with colored flames and sparks including red, orange, yellow, green, blue, purple and silver. They are generally classified by where they perform, either 'ground' or 'aerial'. Aerial fireworks may have their own Air propulsion, propulsion (skyrocket) or be shot into the air by a Mortar (weapon), mortar (aerial shell). Most fireworks consist of a paper or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
