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Water Cannon
A water cannon is a device that shoots a high-velocity stream of water. Typically, a water cannon can deliver a large volume of water, often over dozens of meters. They are used in firefighting, large vehicle washing, riot control, and mining. Most water cannons fall under the category of a fire monitor. Firefighting Water cannons were first devised for use on fireboats. Extinguishing fires on boats and buildings near the water was much more difficult and dangerous before fireboats were invented. The first fireboat deployed in Los Angeles was commissioned on 1 August 1919. The first fireboat in New York City was ''Marine 1'', deployed 1 February 1891. There may have been other fireboats elsewhere even earlier. Fire apparatus, Fire trucks deliver water with much the same force and volume as water cannons, and have even been used in riot control situations, but are rarely referred to as water cannons outside this context. Riot control The first truck-mounted water cannon was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Police Water Cannon In Protests Against Netanyahu
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order as well as the public itself. This commonly includes ensuring the safety, health, and possessions of citizens, and to prevent crime and civil disorder. Their lawful powers encompass arrest and the use of force legitimized by the state via the monopoly on violence. The term is most commonly associated with the police forces of a sovereign state that are authorized to exercise the Law enforcement agency powers, police power of that state within a defined legal or territorial area of responsibility. Police forces are often defined as being separate from the military and other organizations involved in the defense of the state against foreign aggressors; however, gendarmerie are military units charged with civil policing. Police forces are usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stuttgart 21
Stuttgart 21 is a railway and urban development project in Stuttgart, Germany. It is a part of the Stuttgart–Augsburg new and upgraded railway and the Main Line for Europe (Paris—Vienna) within the framework of the Trans-European Networks. Its core is a renewed Stuttgart Hauptbahnhof, among some of new railways, including some of tunnels and of high-speed lines. The project was officially announced in April 1994. Construction work began on 2 February 2010. In March 2013, total costs were officially estimated at €6.5 billion, the previous estimate being €4.5 billion in 2009. In March 2022, Deutsche Bahn estimated the total cost at €9.15 billion. Heated debate ensued on a broad range of issues, including the relative costs and benefits, geological and environmental concerns, as well as performance issues. In 2019, operations had been expected to start in December 2025, delayed from the initial estimation of 2019 (made in 2010). In 2024, the opening date for main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic
A ceramic is any of the various hard, brittle, heat-resistant, and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were fired clay bricks used for building house walls and other structures. Other pottery objects such as pots, vessels, vases and figurines were made from clay, either by itself or mixed with other materials like silica, hardened by sintering in fire. Later, ceramics were glazed and fired to create smooth, colored surfaces, decreasing porosity through the use of glassy, amorphous ceramic coatings on top of the crystalline ceramic substrates. Ceramics now include domestic, industrial, and building products, as well as a wide range of materials developed for use in advanced ceramic engineering, such as semiconductors. The word '' ceramic'' comes from the Ancient Greek word (), meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrodemolition
Hydrodemolition (also known as hydro demolition, hydroblasting, hydro blasting, hydromilling, waterblasting, and waterjetting) is a concrete removal technique which utilizes high-pressure water, often containing an abrasive material, to remove deteriorated and sound concrete as well as Asphalt concrete, asphalt and grout. This process provides an excellent bonding surface for repair material and new coating applications. First developed in Europe in the 1980s, this technology has become widely accepted for concrete removal and surface preparation throughout Europe and North America. Hydrodemolition is not used as much for demolition as it is for surface restoration and protection projects. When concrete has deteriorated or the reinforcing steel has begun to corrode, it is necessary to remove any unsound concrete and rebar, reinforcing bars (rebar) in order to replace it with new concrete and maintain the integrity of the structure. This process has also been used to remove sound ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dike (geology), dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF diagram, QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Jet Cutter
A water jet cutter, also known as a water jet or waterjet, is an industrial tool capable of cutting a wide variety of materials using an extremely high-pressure jet of water, or a mixture of water and an abrasive substance. The term abrasive jet refers specifically to the use of a mixture of water and an abrasive to cut hard materials such as metal, stone or glass, while the terms pure waterjet and water-only cutting refer to waterjet cutting without the use of added abrasives, often used for softer materials such as wood or rubber. Waterjet cutting is often used during the fabrication of machine parts. It is the preferred method when the materials being cut are sensitive to the high temperatures generated by other methods; examples of such materials include plastic and aluminium. Waterjet cutting is used in various industries, including mining and aerospace, for cutting, shaping, and reamer, reaming. History Waterjet While using high-pressure water for erosion dates bac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Pistol
A water gun (or water pistol, water blaster, or squirt gun) is a type of toy gun designed to shoot jets of water. Similar to water balloons, the primary purpose of the toy is to soak another person in a recreational game such as a water fight. Historically, water guns were made of metal and used rubber squeeze bulbs to load and propel water through a nozzle like a Pasteur pipette. While the oldest surviving example of a squirt gun dates to J.W. Wolff's June 30, 1896 patent, depictions of children using water-spraying devices date back to at least the 16th century. In Pieter Bruegel the Elder's painting ''Children's Games'' (1560), a child appears to be using a squirt toy to spray water, suggesting early forms of water guns. The oldest known reference to a squirt gun is dated thirty-five years prior to Wolff’s patent, with General William T. Sherman's 1861 quote regarding the effort to quell secession: "Why, you might as well attempt to put out the flames of a burning house wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressure Washer
Pressure washing or power washing is the use of high-pressure water spray to remove loose paint, mold, grime, dust, mud, and dirt from surfaces and objects such as buildings, vehicles and concrete surfaces. The volume of a mechanical pressure washer is expressed in gallons or liters per minute, often designed into the pump and not variable. The pressure, expressed in pounds per square inch, pascals, or bar, is designed into the pump but can be varied by adjusting the unloader valve or using specialized nozzle tips. Machines that produce pressures from 750 to 30,000 psi (5 to 200 MPa) or more are available. The terms pressure washing and power washing are used interchangeably in many scenarios, and there is some debate as to whether they are actually different processes. An industrial pressure washing surface cleaner is a tool consisting of two to four high-pressure jets on a rotating bar that swivels when water is flowing. Some systems involve a wheeled circular shroud whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Troubles
The Troubles () were an ethno-nationalist conflict in Northern Ireland that lasted for about 30 years from the late 1960s to 1998. Also known internationally as the Northern Ireland conflict, it began in the late 1960s and is usually deemed to have ended with the Good Friday Agreement of 1998. Although the Troubles mostly took place in Northern Ireland, at times violence spilled over into parts of the Republic of Ireland, England, and mainland Europe. Sometimes described as an Asymmetric warfare, asymmetric or Irregular warfare, irregular war or a low-intensity conflict, the Troubles were a political and nationalistic struggle fueled by historical events, with a strong Ethnic conflict, ethnic and sectarian dimension, fought over the Partition of Ireland, status of Northern Ireland. Unionism in Ireland, Unionists and Ulster loyalism, loyalists, who for Plantation of Ulster, historical reasons were mostly Ulster Protestants, wanted Northern Ireland to remain within the United Ki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Ulster Constabulary
The Royal Ulster Constabulary (RUC) was the police force in Northern Ireland from 1922 to 2001. It was founded on 1 June 1922 as a successor to the Royal Irish Constabulary (RIC) Richard Doherty, ''The Thin Green Line – The History of the Royal Ulster Constabulary GC'', pp. 5, 17, 27, 93, 134, 271; Pen & Sword Books; following the partition of Ireland. At its peak the force had around 8,500 officers, with a further 4,500 who were members of the RUC Reserve. The RUC policed Northern Ireland from the aftermath of the Irish War of Independence until after the turn of the 21st century and played a major role in the Troubles between the 1960s and the 1990s. Due to the threat from the Provisional Irish Republican Army (IRA), who saw the RUC as enforcing British rule, the force was heavily armed and militarised. Officers routinely carried submachine guns and assault rifles, travelled in armoured vehicles, and were based in heavily fortified police stations.Weitzer, Ronald. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastic Bullet
Plastic bullet can refer to: * Plastic baton round: a large, blunt, low-velocity projectile fired from a specialized gun, intended as a less-lethal weapon for riot control and an alternative to rubber bullets. * Plastic bullet: a conventionally sized and shaped bullet made from a composite material including plastic, fired from a conventional rifle and capable of penetrating human tissue, intended as a less lethal weapon for riot control. * Plastic bullet (target shooting): a blunt, lightweight handgun bullet intended for short-range target practice, not intended for use as a weapon. Both types of plastic bullet intended for riot control have caused deaths. Plastic bullets are generally used for riot control. Some plastic bullets are intended to be aimed at the ground so as to ricochet into the target; others are intended to be fired directly at a person. Plastic baton rounds were invented by British researchers to provide a more accurate alternative to rubber bullets, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Force
In political philosophy, a monopoly on violence or monopoly on the legal use of force is the property of a polity that is the only entity in its jurisdiction to legitimately use force, and thus the supreme authority of that area. While the monopoly on violence as the defining conception of the state was first described in sociology by Max Weber in his essay ''Politics as a Vocation'' (1919), the monopoly of the legitimate use of physical force is a core concept of modern public law, which goes back to French jurist and political philosopher Jean Bodin's 1576 work ''Les Six livres de la République'' and English philosopher Thomas Hobbes's 1651 book ''Leviathan''. Weber claims that the state is the "only human ''Gemeinschaft'' which lays claim to the monopoly on the legitimate use of physical force. As such, states can resort to coercive means such as incarceration, expropriation, humiliation, and death threats to obtain the population's compliance with its rule and thus mainta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
