energy barrier
41Thermal break — (thermal barrier) An element of low heat conductivity placed in such a way as to reduce or prevent the flow of heat. Some metal framed windows are designed with thermal breaks to improve their overall thermal performance. California Energy… …
42Transmittance — The time rate of heat flow per unit area under steady conditions from the air (or other fluid) on the warm side of a barrier to the air (or fluid) on the cool side, per unit temperature difference between the two sides. California Energy… …
43cell junction — The area of immediate contact between two layers (positive and negative) of a photovoltaic cell. The junction lies at the center of the cell barrier or depletion zone. Solar Electric Glossary …
44Reflective Insulation — (see also radiant barrier) An aluminum foil fabricated insulator with backings applied to provide a series of closed air spaces with highly reflective surfaces …
45Single Glaze or Pane — One layer of glass in a window frame. It has very little insulating value (R 1) and provides only a thin barrier to the outside and can account for considerable heat loss and gain …
46Nuclear fusion — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical dec …
47radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
48Scanning tunneling microscope — Image of reconstruction on a clean Gold(100) surface …
49Downhill folding — is a process in which a protein folds without encountering any significant macroscopic free energy barrier. It is a key prediction of the folding funnel hypothesis of the energy landscape theory of proteins. Contents 1 Overview 2 Experimental… …
50Inertial confinement fusion — (ICF) is a process where nuclear fusion reactions are initiated by heating and compressing a fuel target, typically in the form of a pellet that most often contains a mixture of deuterium and tritium.To compress and heat the fuel, energy is… …
