Light pollution is the presence of any unwanted, inappropriate, or excessive artificial lighting. In a descriptive sense, the term light pollution refers to the effects of any poorly implemented lighting sources, during the day or night. Light pollution can be understood not only as a phenomenon resulting from a specific source or kind of pollution, but also as a contributor to the wider, collective impact of various sources of pollution.
Physical security describes security measures that are designed to deny unauthorized access to facilities, equipment, and resources and to protect personnel and property from damage or harm. Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective barriers, locks, access control, perimeter intrusion detection, deterrent systems, fire protection, and other systems designed to protect persons and property.
A park is an area of natural, semi-natural or planted space set aside for human enjoyment and recreation or for the protection of wildlife or natural habitats. Urban parks are green spaces set aside for recreation inside towns and cities. National parks and country parks are green spaces used for recreation in the countryside. State parks and provincial parks are administered by sub-national government states and agencies. Parks may consist of grassy areas, rocks, soil and trees, but may also contain buildings and other artifacts such as monuments, fountains or playground structures. Many parks have fields for playing sports such as baseball and football, and paved areas for games such as basketball. Many parks have trails for walking, biking and other activities. Some parks are built adjacent to bodies of water or watercourses and may comprise a beach or boat dock area. Urban parks often have benches for sitting and may contain picnic tables and barbecue grills.
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 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.
A dead end, also known as a cul-de-sac, a no-through road or a no-exit road, is a street with only one combined inlet and outlet.
Crime prevention through environmental design (CPTED) is an agenda for manipulating the built environment to create safer neighborhoods.
A pocket park is a small park accessible to the general public. While the locations, elements, and uses of pocket parks vary considerably, the common defining characteristic of a pocket park is its small size. Typically, a pocket park occupies one to three municipal lots and is smaller than 0.5 hectares in size.
Illegal dumping, also called fly dumping or fly tipping (UK), is the dumping of waste illegally instead of using an authorised method such as curbside collection or using an authorised rubbish dump. It is the illegal deposit of any waste onto land, including waste dumped or tipped on a site with no licence to accept waste.
In the field of physical security, security lighting is lighting that intended to deter or detect intrusions or other criminal activity occurring on a property or site. It can also be used to increase a feeling of safety. Lighting is integral to crime prevention through environmental design. A 2019 study in New York City found that the provision of street lights, an important type of security lighting, resulted in a "36 percent reduction in nighttime outdoor index crimes."
Racial steering refers to the practice in which real estate brokers guide prospective home buyers towards or away from certain neighborhoods based on their race. The term is used in the context of de facto residential segregation in the United States, and is often divided into two broad classes of conduct:
- Advising customers to purchase homes in particular neighborhoods on the basis of race.
- Failing, on the basis of race, to show, or to inform buyers of homes that meet their specifications.
The Death and Life of Great American Cities is a 1961 book by writer and activist Jane Jacobs. The book is a critique of 1950s urban planning policy, which it holds responsible for the decline of many city neighborhoods in the United States. The book is Jacobs' best-known and most influential work.
Rational choice modeling has a long history in criminology. This method was designed by Cornish and Clarke to assist in thinking about situational crime prevention. In this context, the belief that crime generally reflects rational decision-making by potential criminals is sometimes called the rational choice theory of crime.
Deterrence in relation to criminal offending is the idea or theory that the threat of punishment will deter people from committing crime and reduce the probability and/or level of offending in society. It is one of five objectives that punishment is thought to achieve; the other four objectives are denunciation, incapacitation, retribution and rehabilitation.
Crime prevention is a strategy used to reduce and prevent crime. Many governments specifically apply it to their efforts to reduce crime, enforce the law, maintain criminal justice and uphold overall stability.
The defensible space theory of architect and city planner Oscar Newman encompasses ideas about crime prevention and neighborhood safety. Newman argues that architectural and environmental design plays a crucial part in increasing or reducing criminality. The theory developed in the early 1970s, and he wrote his first book on the topic, Defensible Space, in 1972. The book contains a study from New York that pointed out that higher crime rate existed in high-rise housing projects than in low-rise complexes. This, he concluded, was because residents felt no control or personal responsibility for an area occupied by so many people. Throughout his study, Newman focused on explaining his ideas on social control, crime prevention, and public health in relation to community design.
Incapacitation in the context of criminal sentencing philosophy is one of the functions of punishment. It involves capital punishment, sending an offender to prison, or possibly restricting their freedom in the community, to protect society and prevent that person from committing further crimes. Incarceration, as the primary mechanism for incapacitation, is also used as to try to deter future offending.
In urban design, permeability and connectivity are terms that describe the extent to which urban forms permit movement of people or vehicles in different directions. The terms are often used interchangeably, although differentiated definitions also exist. Permeability is generally considered a positive attribute of an urban design, as it permits ease of movement and avoids severing neighbourhoods. Urban forms which lack permeability, e.g. those severed by arterial roads, or with many long culs-de-sac, are considered to discourage movement on foot and encourage longer journeys by car. There is some empirical research evidence to support this view.
Hostile architecture, also known as defensive architecture, hostile design, unpleasant design, exclusionary design, anti-homeless architecture, or defensive urban design, is an urban-design strategy that uses elements of the built environment to purposefully guide behavior. It often targets people who use or rely on public space more than others, such as youth, poor people, and homeless people, by restricting the physical behaviours they can engage in.
Smart cities seek to implement information and communication technologies (ICT) to improve the efficiency and sustainability of urban spaces while reducing costs and resource consumption. In the context of surveillance, smart cities monitor citizens through strategically placed sensors around the urban landscape, which collect data regarding many different factors of urban living. From these sensors, data is transmitted, aggregated, and analyzed by governments and other local authorities to extrapolate information about the challenges the city faces in sectors such as crime prevention, traffic management, energy use and waste reduction. This serves to facilitate better urban planning and allows governments to tailor their services to the local population.
Urban vitality is the quality of spaces in cities that attract diverse groups of people for a range of activities at different times of the day. Such spaces are often be perceived as being alive, lively or vibrant, in contrast with low-vitality areas, which may repel people and be perceived as unsafe.
