Preservation (library and archive)In conservation, library and archival science, preservation is a set of preventive conservation activities aimed at prolonging the life of a record, book, or object while making as few changes as possible. Preservation activities vary widely and may include monitoring the condition of items, maintaining the temperature and humidity in collection storage areas, writing a plan in case of emergencies, digitizing items, writing relevant metadata, and increasing accessibility.
Digital preservationIn library and archival science, digital preservation is a formal endeavor to ensure that digital information of continuing value remains accessible and usable. It involves planning, resource allocation, and application of preservation methods and technologies, and it combines policies, strategies and actions to ensure access to reformatted and "born-digital" content, regardless of the challenges of media failure and technological change. The goal of digital preservation is the accurate rendering of authenticated content over time.
Historic preservationHistoric preservation (US), built heritage preservation or built heritage conservation (UK), is an endeavor that seeks to preserve, conserve and protect buildings, objects, landscapes or other artifacts of historical significance. It is a philosophical concept that became popular in the twentieth century, which maintains that cities as products of centuries' development should be obligated to protect their patrimonial legacy. The term refers specifically to the preservation of the built environment, and not to preservation of, for example, primeval forests or wilderness.
Humanitarian protectionHumanitarian protection is the act of promoting and ensuring the legal rights of people affected by humanitarian crises. The concept of humanitarian protection was established by the 1949 Geneva Conventions and responsibility to ensure protection was mandated to the International Committee of the Red Cross. Outside of times of crises, national governments tend to have responsibility to ensure that people's rights are protected, but during humanitarian emergencies aid agencies often perform the task.
Humanitarian principlesThere are a number of meanings for the term humanitarian. Here, humanitarian pertains to the practice of saving lives and alleviating suffering. It is usually related to emergency response (also called humanitarian response) whether in the case of a natural disaster or a man-made disaster such as war or other armed conflict. Humanitarian principles govern the way humanitarian response is carried out. Humanitarian principles are a set of principles that governs the way humanitarian response is carried out.
Socialist realismSocialist realism is a style of idealized realistic art that was developed in the Soviet Union and was the official style in that country between 1932 and 1988, as well as in other socialist countries after World War II. Socialist realism is characterized by the depiction of communist values, such as the emancipation of the proletariat. Despite its name, the figures in the style are very often highly idealized, especially in sculpture, where it often leans heavily on the conventions of classical sculpture.
Zoom lensA zoom lens is a system of camera lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed-focal-length (FFL) lens (prime lens). A true zoom lens or optical zoom lens is a type of parfocal lens, one that maintains focus when its focal length changes. Most consumer zoom lenses do not maintain perfect focus, but are still nearly parfocal. Most camera phones that are advertised as having optical zoom actually use a few cameras of different but fixed focal length, combined with digital zoom to make a hybrid system.
Telephoto lensA telephoto lens, in photography and cinematography, is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens in a much shorter overall design. The angle of view and other effects of long-focus lenses are the same for telephoto lenses of the same specified focal length.
DNA repairDNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome. In human cells, both normal metabolic activities and environmental factors such as radiation can cause DNA damage, resulting in tens of thousands of individual molecular lesions per cell per day. Many of these lesions cause structural damage to the DNA molecule and can alter or eliminate the cell's ability to transcribe the gene that the affected DNA encodes.
Intentional communityAn intentional community is a voluntary residential community which is designed to have a high degree of social cohesion and teamwork. The members of an intentional community typically hold a common social, political, religious, or spiritual vision, and typically share responsibilities and property. This way of life is sometimes characterized as an "alternative lifestyle". Intentional communities can be seen as social experiments or communal experiments.
