bi-directional light
101Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
102telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… …
103Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
104Dark matter — Not to be confused with antimatter, dark energy, dark fluid or dark flow. For other uses, see Dark Matter (disambiguation) …
105Platform game — This article is about the computer and video game genre. For platformer units in petroleum refining, see Catalytic reforming …
106Optical tweezers — (originally called single beam gradient force trap ) are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch… …
107Northern Michigan — This article is about the region. For the university, see Northern Michigan University. Northern Michigan Northern Lower Michigan Lower Peninsula of Michigan …
108Pipil grammar — This article provides a grammar sketch of the Nawat or Pipil language, an endangered language spoken by the Pipils of western El Salvador, belonging to the Nahua group within the Uto Aztecan language family. There also exists a brief typological… …
109Plant perception (physiology) — In the study of plant physiology plant perception is a term used to describe mechanisms by which plants recognize changes in the environment. Examples of stimuli which plants perceive and can react to include chemicals, gravity, light, moisture,… …
110materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
