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Anti-graffiti Coating
An anti-graffiti coating is a coating that prevents graffiti paint from bonding to surfaces. Cleaning graffiti off buildings costs billions of dollars annually. Many cities have started anti-graffiti programs but vandalism is still a problem. Companies across the globe are attempting to develop coatings to prevent vandals from defacing public and private property. The coatings being developed can be the paint itself, or a clear coat added on top of existing paint or building facades. Depending on the substrate and the severity of graffiti, different coatings give different benefits and disadvantages. Types of paint There are two common types of paint used today. The first are water-based paints such as latex and acrylic paint, and the second are oil-based paints. The paint of choice will depend on the substrate to be painted upon and the desired end result. All paints have the same basic structure: * Pigment – this is the part of the paint that is seen by the eye. The pigment g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coating
A coating is a covering that is applied to the surface of an object, or substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. powder coatings. Paints and lacquers are coatings that mostly have dual uses, which are protecting the substrate and being decorative, although some artists paints are only for decoration, and the paint on large industrial pipes is for identification (e.g. blue for process water, red for fire-fighting control) in addition to preventing corrosion. Along with corrosion resistance, functional coatings may also be applied to change the surface properties of the substrate, such as adhesion, wettability, or wear resistance.Howarth G.A "Synthesis of a legislation compliant corrosion protection coating system based on urethane, oxazolidine and waterborne epoxy technology" Master of Science Thesis April 1997 Imperial College London In other cases the coating adds a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oleophobic
Lipophobicity, also sometimes called lipophobia (from the Greek λιποφοβία from λίπος ''lipos'' "fat" and φόβος ''phobos'' "fear"), is a chemical property of chemical compounds which means "fat rejection", literally "fear of fat". Lipophobic compounds are those not soluble in lipids or other non-polar solvents. From the other point of view, they do not absorb fats. "Oleophobic" (from the Latin ''oleum'' "oil", Greek ελαιοφοβικό ''eleophobico'' from έλαιο ''eleo'' "oil" and φόβος ''phobos'' "fear") refers to the physical property of a molecule that is seemingly repelled from oil. (Strictly speaking, there is no repulsive force involved; it is an absence of attraction.) The most common lipophobic substance is water. Fluorocarbons are also lipophobic/oleophobic in addition to being hydrophobic. Uses A lipophobic coating has been used on the touchscreens of Apple's iPhones since the 3GS, their iPads, Nokia's N9 and Lumia devices, the HTC HD2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graffiti And Unauthorised Signage
Graffiti (singular ''graffiti'', or ''graffito'' only in Graffito (archaeology), graffiti archeology) is writing or drawings made on a wall or other surface, usually without permission and within public view. Graffiti ranges from simple written Moniker (graffiti), "monikers" to elaborate wall paintings, and has existed Graffito (archaeology), since ancient times, with examples dating back to ancient Egypt, ancient Greece, and the Roman Empire. Modern graffiti is a controversial subject. In most countries, marking or painting property without permission is considered vandalism. Modern graffiti began in the New York City Subway nomenclature, New York City subway system and Philadelphia in the early 1970s and later spread to the rest of the United States and throughout the world. Etymology "Graffiti" (usually both singular and plural) and the rare singular form "graffito" are from the Italian word ''graffiato'' ("scratched"). In ancient times graffiti were carved on walls with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coatings
A coating is a covering that is applied to the surface of an object, or substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. powder coatings. Paints and lacquers are coatings that mostly have dual uses, which are protecting the substrate and being decorative, although some artists paints are only for decoration, and the paint on large industrial pipes is for identification (e.g. blue for process water, red for fire-fighting control) in addition to preventing corrosion. Along with corrosion resistance, functional coatings may also be applied to change the surface properties of the substrate, such as adhesion, wettability, or wear resistance.Howarth G.A "Synthesis of a legislation compliant corrosion protection coating system based on urethane, oxazolidine and waterborne epoxy technology" Master of Science Thesis April 1997 Imperial College London In other cases the coating adds a comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graffiti Removal
Graffiti has long been considered an act of vandalism that signifies urban decay and a detriment to property values in an area. Therefore, most governments have seen graffiti as detrimental, and have outlawed the practice. However, due to most instances of graffiti occurring in public spaces, local governments are responsible for graffiti removal in order to maintain the beautification of their local shire, council or city. Graffiti as a negative externality Governments see graffiti as a Externality, negative externality because it largely inhibits or detracts from the beautification of a local community. This can often stigmatise a neighbourhood or community through being labelled as a low socio-economic area. Indeed, this converts to suppressed housing prices and has strong correlations with local crime and gang activities. Considering the great cost graffiti incurs on local communities, governments take the burden of the negative externality, through removal. Due to the nature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-trespass Panels
Anti-trespass panels (ATPs) are a type of hostile architecture used by railroads to improve safety by reducing pedestrian accidents. They consist of materials such as wood or rubber arranged in such a way that they are difficult to walk on stably, and are placed adjacent to pedestrian crossings or stations, where there is a possibility that people might trespass on the railroad's right-of-way (transportation), right-of-way and be struck and killed or seriously injured by passing trains. The panels were first used in the United Kingdom. Many are still in place; they consist of wooden planks arrayed in a Saw-tooth roof, sawtooth pattern, on which it is difficult to stand or walk steadily. Modern variants, introduced in the early 2000s, used rubber shaped into pyramids, and later cones, a configuration that has led to the nickname witches' hats. Since their introduction anti-trespass panels have been used elsewhere in Europe, Australia, Canada and the United States. Studies have conf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-climb Paint
Anti-climb paint (also known as non-drying paint, anti-intruder paint, anti-vandal grease) is a class of paint consisting of a thick oily coating that is applied with a stiff brush, trowel or by hand using a protective glove. In appearance it is similar to smooth gloss paint when applied but it remains slippery for a minimum of three years, thereby hindering an intruder from gaining a foothold. Uses It is used to prevent climbing on objects such as lamp posts, walls and fences. It owes its effectiveness to the fact that it is based on a non-drying oil and keeps the surface greasy and slippery. As an additional advantage, it leaves its mark on the person touching it and hence makes it possible for intruders to be identified. Anti-climb paint is often used to deter burglars seeking to enter a building by climbing up to a higher entry point, such as a window on an upper floor. Characteristics Anti-climb paint continues to work in hot or cold weather conditions, adhering to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siloxane
In organosilicon chemistry, a siloxane is an organic compound containing a functional group of two silicon atoms bound to an oxygen atom: . The parent siloxanes include the oligomeric and polymeric hydrides with the formulae and . Siloxanes also include branched compounds, the defining feature of which is that each pair of silicon centres is separated by one oxygen atom. The siloxane functional group forms the backbone of silicones , the premier example of which is polydimethylsiloxane (PDMS). The functional group (where the three Rs may be different) is called siloxy. Siloxanes are manmade and have many commercial and industrial applications because of the compounds’ hydrophobicity, low thermal conductivity, and high flexibility. Structure Siloxanes generally adopt structures expected for linked tetrahedral ("''sp''3-like") centers. The Si−O bond length is 1.64 Å (vs Si–C distance of 1.92 Å) and the Si-O-Si angle is rather open at 142.5°. By ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neighborhood Watch
A neighborhood watch or neighbourhood watch (see American and British English spelling differences#-our, -or, spelling differences), also called a crime watch or neighbourhood crime watch, is an organized group of civilians devoted to crime and vandalism prevention within a neighborhood. The aim of neighborhood watch includes educating residents of a community on security and safety and achieving safe and secure neighborhoods. However, when a criminal activity is suspected, members are encouraged to report to authorities, and not to intervene. Organization A neighborhood watch may be organized as its own group or may simply be a function of a neighborhood association or other community association. While not all neighborhood watch groups are vigilantes, some are and use vigilante practices in order for them to handle crime in their neighborhoods. In the United States, neighborhood watch groups increased in popularity throughout the 1980s and 1990s in part as a response to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historic Districts In The United States
Historic districts in the United States are designated historic districts recognizing a group of buildings, archaeological resources, or other properties as historically or architecturally significant. Buildings, structures, objects, and sites within a historic district are normally divided into two categories, Contributing property, contributing and non-contributing. Districts vary greatly in size and composition: a historic district could comprise an entire neighborhood with hundreds of buildings, or a smaller area with just one or a few resources. Historic districts can be created by federal, state, or Local government, local governments. At the federal level, they are designated by the National Park Service and listed on the National Register of Historic Places; this is a largely honorary designation that does not restrict what property owners may do with a property. U.S. state, State-level historic districts usually do not include restrictions, though this depends on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Heritage
English Heritage (officially the English Heritage Trust) is a charity that manages over 400 historic monuments, buildings and places. These include prehistoric sites, a battlefield, medieval castles, Roman forts, historic industrial sites, Listed building, listed ruins, and architecturally notable English country houses. The charity states that it uses these properties to "bring the story of England to life for over 10 million people each year". Within its portfolio are Stonehenge, Dover Castle, Tintagel Castle, and the "best-preserved" parts of Hadrian's Wall. English Heritage also manages the London blue plaque scheme, which links influential historical figures to particular buildings. When originally formed in 1983, English Heritage was the operating name of an executive non-departmental public body of the Her Majesty's Government, British Government, officially titled the Historic Buildings and Monuments Commission for England, that ran the national system of heritage prot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Park Service
The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List of national parks of the United States, national parks; most National monument (United States), national monuments; and other natural, historical, and recreational properties, with various title designations. The United States Congress created the agency on August 25, 1916, through the National Park Service Organic Act. Its headquarters is in Washington, D.C., within the main headquarters of the Department of the Interior. The NPS employs about 20,000 people in units covering over in List of states and territories of the United States, all 50 states, the District of Columbia, and Territories of the United States, US territories. In 2019, the service had more than 279,000 volunteers. The agency is charged with preserving the ecological a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
