|
Chemlight
A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once. The used tube is then thrown away. Glow sticks are often used for recreation, such as for events, camping, outdoor exploration, and concerts. Glow sticks are also used for light in military and emergency services applications. Industrial uses include marine, transportation, and mining. History Bis(2,4,5-trichloro-6-(pentyloxycarbonyl)phenyl)oxalate, trademarked "Cyalume", was invented in 1971 by Michael M. Rauhut, of American Cyanamid, based on work by Edwin A. Chandross and David Iba Sr. of Bell Labs. Other early work on chemiluminescence was carried out at the same time, by researchers under Herbert Richter at China Lake Naval Weapons Center. Sever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recreational Diving
Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for enjoyment, amusement, or pleasure and are considered to be " fun". Etymology The term ''recreation'' appears to have been used in English first in the late 14th century, first in the sense of "refreshment or curing of a sick person", and derived turn from Latin (''re'': "again", ''creare'': "to create, bring forth, beget"). Prerequisites to leisure People spend their time on activities of daily living, work, sleep, social duties and leisure, the latter time being free from prior commitments to physiologic or social needs, a prerequisite of recreation. Leisure has increased with increased longevity and, for many, with decreased hours spent for physical and economic survival, yet others argue that time pressure has increased for modern people, as they are committed to to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Police Tactical Unit
A police tactical unit (PTU) is a specialized police unit trained and equipped to handle situations that are beyond the capabilities of ordinary law enforcement units because of the level of violence (or risk of violence) involved. The tasks of a police tactical unit may include executing dangerous search warrants and arrest warrants for dangerous persons; arrest without warrant, arresting or neutralizing dangerous or mental disorder, mentally ill armed persons; and intervening in high-risk situations such as Shootout, shootouts, Police standoff, standoffs, hostage, hostage-takings, and terrorism, terrorist incidents. Definition Police tactical units are dedicated units composed of personnel selected and trained in tactical skillsets to carry out the responsibilities of the unit, and in use of force, use-of-force policies, including lethal force for counterterrorism. A PTU is equipped with specialized police and military-type equipment. A PTU may have specialized combat assault ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Survival Kit
A survival kit is a package of basic tools and supplies prepared as an aid to survival skills, survival in an emergency. Civil and military aircraft, lifeboat (shipboard), lifeboats, and spacecraft are equipped with survival kits. Survival kits, in a variety of sizes, contain supplies and tools to provide a survivor with basic shelter against the elements, help them to keep warm, meet basic health and first aid needs, provide food and water, signal to rescuers, and assist in finding the way back to help. Supplies in a survival kit normally include a knife (often a Swiss army knife or a multi-tool), matches, tinder, first aid kit, bandana, fish hooks, Sewing, sewing kit, and a flashlight. Civilians such as forestry workers, surveyors, or Bush flying, bush pilots, who work in remote locations or in regions with extreme climate conditions, may also be equipped with survival kits. Disaster supplies are also kept on hand by those who live in areas prone to earthquakes or other natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitewater, Wisconsin
Whitewater is a city located in Walworth and Jefferson counties in the U.S. state of Wisconsin. Located near the southern portion of the Kettle Moraine State Forest, Whitewater is the home of the University of Wisconsin–Whitewater. As of the 2020 census, the city's population was 14,889. History Whitewater was founded at the confluence of Whitewater Creek and Spring Brook, and named for the white sand in their beds.History of Whitewater A was built on Whitewater creek, the resulting pond now called Cravath Lake. The town ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Wisconsin–Whitewater
The University of Wisconsin–Whitewater (UW–Whitewater or UWW) is a public university in Whitewater, Wisconsin, United States. It is part of the University of Wisconsin System. As of Fall 2024, the university offers 47 undergraduate majors and 13 graduate programs and enrolls approximately 11,000 students. Approximately 1,400 faculty and staff are employed by the university, and the student body consists of individuals from about 40 US states and 30 countries. After the 2018 UW System Restructuring, the University of Wisconsin-Rock County began operating as the University of Wisconsin–Whitewater at Rock County, a 2-year branch campus located in Janesville, Wisconsin. History On April 21, 1868, the school was named "Whitewater Normal School" and graduated its first class of teachers in June 1870. A unique tradition of the school was known as "Students' Day." One day during the term, faculty would, unannounced, be entirely absent. Once students recognized that the day mus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinness Book Of Records
''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a British reference book published annually, listing world records both of human achievements and the extremes of the natural world. Hugh Beaver, Sir Hugh Beaver created the concept, and twin brothers Norris McWhirter, Norris and Ross McWhirter co-founded the book in London in August 1955. The first edition topped the bestseller list in the United Kingdom by Christmas 1955. The following year the book was launched internationally, and as of the 2025 edition, it is now in its 70th year of publication, published in 100 countries and 40 languages, and maintains over 53,000 records in its database. The international Franchising, franchise has extended beyond print to include television series and museums. The popularity of the franchise has resulted in ''Guinness World Records'' becoming the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balloon-carried Light Effect
A balloon-carried light effect is a special effect carried by a balloon, which can be fixed with a rope to the ground or free-flying. They are commonly misidentified as "Unidentified Flying Objects" by members of public. Uses Balloon-carried light effects can be used without safety concerns at events with a lot of people, because unlike fireworks they do not require the use of flammable substances. The brightness is much lower, when non-dangerous light sources such as lightsticks or battery-powered lamps are used. Balloon-carried light effects cannot replace fireworks, but supplement them, because of their long lighting time (if lightsticks or battery powered lamps are used) and because of their inherent safety. To realise a balloon-carried light effect, one or more balloons are used, capable of carrying a lightstick or a small battery powered lamp. Further it is possible to insert one or two small lightsticks into a transparent balloon. It is also possible for larger balloon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marching Band
A marching band is a group of instrumental musicians who play while marching. Historically they were used in armed forces and many marching bands remain military bands. Others are still associated with military units or emulate a military style, with elements such as uniforms, flags and batons and occasionally rifles or sabers. Instrumentation typically includes brass, woodwind, and percussion instruments. Marching bands are generally categorised by affiliation, function, size and instrumentation. In addition to traditional military parades, marching bands are frequently seen at events as varied as carnivals, parades, sporting events, trade union events and marching band competitions. History Instruments have been frequently used on the battlefield (for example the Iron Age carnyx and the medieval Ottoman military band) but the modern marching band developed from European military bands formed in the Baroque period, partly influenced by the Ottoman tradition. 17th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nightclub
A nightclub or dance club is a club that is open at night, usually for drinking, dancing and other entertainment. Nightclubs often have a Bar (establishment), bar and discotheque (usually simply known as disco) with a dance floor, laser lighting displays, and a stage for live music or a disc jockey (DJ) who mixes recorded music. Nightclubs tend to be smaller than live music venues like theatres and stadiums, with few or no seats for customers. Nightclubs generally restrict access to people in terms of age, Clothing, attire, personal property, personal belongings, and behaviors. Nightclubs typically have dress codes to prohibit people wearing informal, indecent, offensive, or gang-related attire from entering. Unlike other entertainment venues, nightclubs are more likely to use Bouncer (doorman), bouncers to screen prospective patrons for entry. The busiest nights for a nightclub are Friday and Saturday nights. Most nightclubs cater to a particular music genre or sound for bran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concert
A concert, often known informally as a gig or show, is a live performance of music in front of an audience. The performance may be carried by a single musician, in which case it is sometimes called a recital, or by a musical ensemble such as an orchestra, choir, or musical band, band. Concerts are held in a wide variety of settings and sizes, spanning from music venue, venues such as private houses and small nightclubs to mid-sized concert halls and finally to large arenas and stadiums, as well as outdoor venues such as amphitheatres and parks. Indoor concerts held in the largest venues are sometimes called arena concerts or amphitheatre concerts. Regardless of the venue, musicians usually perform on a stage (theatre), stage (if not an actual stage, then an area of the floor designated as such). Concerts often require live event support with professional audio equipment. Before recorded music, concerts provided the main opportunity to hear musicians play. For large concerts or co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
