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...because the dry soil or rock matrix is a virtual insulator at DC and near DC frequencies. The pore fluid is in most cases water, with dissolved salts. T ...) and ''complex resistivity'' (''CR'') techniques are special cases of the DC method in which the induced potential field is measured and interpreted in

*** d and dc exponent

;DC:drill collar

...ms by belts, chains, and drive shafts on a mechanical rig, or by generated DC electrical power on an electric rig. Power is distributed to the [https://e

...ity to save kinetic energy (massa or inertia). Vibration system involve ac-dc transfer energy beetwen potential and kinetic shape. In dimmed system some

...sent boundaries and names of states, U.S.A. WI = Wisconsin; IL = Illinois; DC = District of Columbia; VT = Vermont; MA = Massachusetts; CT = Connecticut. ...position of the Rome trough. Modified from Shumaker.<ref name=Shmkr1996 /> DC = District of Columbia; MA = Massachusetts; CT = Connecticut.]]

...pproximatus; Ua = Undulograptus austrodentatus; Ng = Nemagraptus gracilis; Dc = Diplacanthograptus caudatus; and Ne = Normalograptus extraordinarius). Hi

...hown as black lines on a white background. CP = coastal plain heteroliths; DC = distributary channel sandstone; PD = prodelta shales. Photographs and lin