electron drift
101Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
102Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …
103Surface photovoltage — (SPV) measurements are a widely used method to determine the minority carrier diffusion length of semiconductors. Since the transport of minority carriers determines the behavior of the p n junctions that are ubiquitous in semiconductor devices,… …
104transistor — /tran zis teuhr/, n. 1. Electronics. a semiconductor device that amplifies, oscillates, or switches the flow of current between two terminals by varying the current or voltage between one of the terminals and a third: although much smaller in… …
105tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
106Hall effect thruster — In spacecraft propulsion, a Hall thruster is a type of ion thruster in which the propellant is accelerated by an electric field. Hall thrusters trap electrons in a magnetic field and then use the electrons to ionize propellant, efficiently… …
107List of biology topics — Biology is the study of life and its processes. Biologists study all aspects of living things, including all of the many life forms on earth and the processes in them that enable life. These basic processes include the harnessing of energy, the… …
108Hydraulic analogy — The electronic–hydraulic analogy (derisively referred to as the drain pipe theory by Oliver Heaviside) is the most widely used analogy for electron fluid in a metal conductor. Since electric current is invisible and the processes at play in… …
109Kritik an der Relativitätstheorie — von Albert Einstein wurde vor allem in den Jahren nach ihrer Veröffentlichung auf wissenschaftlicher, pseudowissenschaftlicher, philosophischer sowie ideologischer Ebene geäußert. Gründe für die Kritik waren beispielsweise eigene… …
110mobility — /moh bil i tee/, n. 1. the quality of being mobile. 2. Sociol. the movement of people in a population, as from place to place, from job to job, or from one social class or level to another. Cf. horizontal mobility, vertical mobility. [1375 1425;… …
