Analogous colors are groups of three colors that are next to each other on the color wheel, sharing a common color, […]

North light is natural light coming from the north (in the Northern Hemisphere). It consists of light which comes from […]

Scientific and technological inventions changed our lives in communications, transport, industry, engineering, energy […]

Cadmium telluride (CdTe) photovoltaics describes a photovoltaic (PV) technology that is based on the use of cadmium […]

Sustainable forest management is the management of forests according to the principles of sustainable development. […]

Ethanol fuel is ethyl alcohol, the same type of alcohol found in alcoholic beverages, used as fuel. It is most often […]

Polarizing organic photovoltaics (ZOPV) is a concept for harvesting energy from Liquid crystal display screens, […]

A photovoltaic system, also PV system or solar power system, is a power system designed to supply usable solar power by […]

The Droste effect, known in art as an example of mise en abyme, is the effect of a picture recursively appearing within […]

A spatial network (sometimes also geometric graph) is a graph in which the vertices or edges are spatial elements […]

Medical tourism refers to people traveling to a country other than their own to obtain medical treatment. In the past […]

Dental tourism (also called dental vacations or commonly known as dental holidays in Europe) is a subset of the sector […]

A hexapod robot is a mechanical vehicle that walks on six legs. Since a robot can be statically stable on three or more […]

Electron-beam additive manufacturing, or electron-beam melting (EBM) is a type of additive manufacturing, or 3D […]

An airline is a company that provides air transport services for traveling passengers and freight. Airlines utilize […]

The external debt is the amount of debt a country owes to foreign or international creditors. The debtors can be the […]

Environmental justice emerged as a concept in the United States in the early 1980s. The term has two distinct uses with […]

Reverence is “a feeling or attitude of deep respect tinged with awe; veneration”. The word […]