active power filter
61Organic light-emitting diode — Demonstration of a flexible OLED device A green emitting OLED device An …
62Windows Vista — Part of the Microsoft Windows family …
63Austrian legislative election, 2008 — Infobox Election election name = Austrian legislative election, 2008 country = Austria type = parliamentary ongoing = no previous election = Austrian legislative election, 2006 previous year = 2006 previous MPs = next election = next year = seats …
64Technical features new to Windows Vista — This article is part of a series on Windows Vista New features Overview Technical and core system Security and safety Networking technologies I/O technologies Management and administration Removed features …
65animal — animalic /an euh mal ik/, animalian /an euh may lee euhn, mayl yeuhn/, adj. /an euh meuhl/, n. 1. any member of the kingdom Animalia, comprising multicellular organisms that have a well defined shape and usually limited growth, can move… …
66Operational amplifier applications — This article illustrates some typical applications of operational amplifiers. A simplified schematic notation is used, and the reader is reminded that many details such as device selection and power supply connections are not shown. Contents 1… …
67Water supply and sanitation in Pakistan — Drinking water qualityGenerally, water pressure is low in Pakistani supply systems. Together with leaky pipes, this has led to infiltration of contaminated water. As a result of sewage and industrial waste, which leaked into drinking water… …
68Activated carbon — Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions …
69Switching amplifier — A switching amplifier or class D amplifier is an electronic amplifier which, in contrast to the active resistance used in linear mode AB class amplifiers, uses switching mode of transistor to regulate power delivery. The amplifier, therefore,… …
70Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …
