1. Definition Primary Definition: Active Noise Cancellation uses noise-cancelling process to reduce unwanted background noise [1]. Secondary Definition: Active noise cancellation is the electro-acoustic generation of a sound field to cancel an sound field [2]. 2. Background Technology History: Current Status: 3. Function(s) Primary Functions: Supplementary Functions: 4. Materials & Components Overview on Materials & […]

1. Definition Primary Definition: Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption.[1][2] Secondary Definition: This approach works either by preventing heat from entering the interior (heat gain prevention) or by […]

1. Definition Primary Definition: During the process of water treatment via membrane materials, physical and chemical damage is an inevitable phenomenon. Such damage causes the shortage of membrane operating period and eventually cause the increase of operating cost. Therefore, self-healing mechanisms can provide good solution for manufacturing sustainable membrane materials [1]. Secondary Definition: Generally, materials […]

1. Definition Primary Definition: Natural ventilation is the use of wind and ‘chimney effect’ to create air movement in and out of your home without the use of mechanical systems, with the goal of bringing fresh air into your home. During nighttime in the summer months natural ventilation can provide free cooling and reduce your […]

1. Definition Primary Definition: Daylighting describes the controlled use of natural light in and around buildings. It is the practice of placing windows, or other transparent media and reflective surfaces so that natural light provides effective internal illumination during the day. [1] Secondary Definition: The process of using natural sunlight to light a building to […]

1. Definition Primary Definition: “Embodied energy of a building material is phrase used to describe the amount of energy it takes to extract, process, manufacture and deliver any building material over its life cycle. Embodied energy is measured in kilojoules or megajoules. The more kilojoules or megajoules, the higher the level of embodied energy is […]

1. Definition Primary Definition: A zero-energy building (ZE), also known as a zero net energy (ZNE) building, net-zero energy building (NZEB). Net zero building is a building with zero net energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created […]