Abstract: Provided herein are a method for producing a hydrocarbon adsorption catalyst includes dealuminated zeolite by heat-treating a zeolite in moisture-containing air at a first temperature to remove a portion of aluminum included in the zeolite, and supporting a metal on a carrier including the zeolite after the heat-treating and a hydrocarbon adsorption catalyst prepared using the same method. The metal-supported support may be additionally heat-treated in moisture-containing air at a second temperature that is higher than the first temperature.

Abstract: A device for a heat test includes a chamber having an accommodating part to accommodate an object to be tested, a temperature adjuster to adjust a temperature of the accommodating part of the chamber according to a plurality of temperature stages, a temperature detecting part to detect temperature distribution data representing temperature distributions of a plurality of parts of the object accommodated in the accommodating part adjusted at the plurality of temperature stages by the temperature adjuster, a controller receive and store the temperature distribution data detected according to the respective temperature stages by the temperature detecting part, and to calculate temperature differences from the temperatures distribution data between the temperature stages with respect to respective parts of the object, and an outputting part to display the temperature distribution data stored and calculated by the controller.

Abstract: An apparatus to recover a reactive power of a plasma display panel, the apparatus including a power supply source, first and second discharge electrodes to perform a surface discharge with a voltage from the power supply source, a panel capacitor having opposite ends connected to the respective discharge electrodes and which is discharged by supplying a charge voltage to one of the first and second discharge electrodes, an inductor provided between the one of the first and second discharge electrodes and the panel capacitor. The inductor is charged by a discharge current of the panel capacitor and induces the charge voltage of the panel capacitor to be recovered.

Abstract: An apparatus to recover a reactive power of a plasma display panel, the apparatus including a power supply source, first and second discharge electrodes to perform a surface discharge with a voltage from the power supply source, a panel capacitor having opposite ends connected to the respective discharge electrodes and which is discharged by supplying a charge voltage to one of the first and second discharge electrodes, an inductor provided between the one of the first and second discharge electrodes and the panel capacitor. The inductor is charged by a discharge current of the panel capacitor and induces the charge voltage of the panel capacitor to be recovered.

Abstract: In a field effect transistor (FET) discharging circuit for a horizontal deflection circuit, a backward voltage is removed by employing a diode to discharge a high level voltage formed on the FET.