Abstract:
The present invention relates to a system for measuring a sample pore using a computed tomography (CT) and a standard sample and to a method thereof, more particularly to a system for measuring a sample pore using a computed tomography (CT) and a standard sample and to a method thereof, wherein the number of pixels in the count range of a cross-sectional image of the measurement sample and the number of pixels corresponding to the gray level range of the pore are calculated with reference to the count range utilized in the cross-sectional image of the standard sample and the gray level range of the pore so as to accurately measure the porosity of the measurement sample after performing a CT scan of the standard sample and the measurement sample together using a CT scanner.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing chemical manganese dioxide by selectively precipitating only Mn by use of oxidant from a sulfur reducing leaching solution, for selectively separating the Mn from a ternary system cathode active material (Li(NiMnCo)O) as a cathode active material of a lithium ion battery to be used for a mobile phone or an electric car.SOLUTION: The method of manufacturing chemical manganese dioxide from a ternary system cathode active material of the present invention includes: (a) a first leaching step of leaching ternary system cathode active material powder with a mixture of sulfur and a reducing agent; (b) a second leaching step of successively leaching the first leaching solution; and (c) a step of adding NaSOto the second leaching solution, and selectively precipitating Mn to manufacture chemical manganese dioxide.
Abstract:
PROBLEM TO BE SOLVED: To provide a groundwater profile monitoring system.SOLUTION: The present invention provides a groundwater profile monitoring system including: a groundwater sensor configured to sense a state of groundwater; a driving unit including a sensor cable to which the groundwater sensor is connected at one end thereof and configured to vertically move the groundwater sensor; a data logger configured to receive and store sensing information sensed by the groundwater sensor and transmit the sensing information to a designated server; and a power supply unit configured to produce electric power using solar energy and supply the produced electric power to the driving unit and the data logger. According to the present invention, since a profile material of groundwater according to a depth of a tube well can be continuously collected, an accurate groundwater related material can be collected more efficiently.
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic surveying device, an electromagnetic surveying method, and a program capable of easily and precisely processing an offset error when electromagnetically surveying the underground using a small-loop coil. SOLUTION: The electromagnetic surveying device assumes an underground resistivity distribution model and calculates magnetic field strength based on the model, compares the calculated magnetic field strength with actually measured magnetic field strength, continues updating and calculating the resistivity distribution model until the difference converges to not more than a prescribed amount for estimating underground resistivity distribution. The electromagnetic surveying device has an inverse analysis means for calculating linearized magnetic field strength near an initial value based on the updated resistivity distribution model, relating the amount of offset to the calculated magnetic field strength, calculating the difference between the actually measured magnetic field strength and the magnetic field strength of the resistivity distribution model before updating, and updating and calculating the resistivity distribution model until the difference between the magnetic field strength of the resistivity distribution model and the amount of offset converges to not more than a prescribed amount in reference to the difference. COPYRIGHT: (C)2009,JPO&INPIT