Abstract: The invention relates to an electronic security bag controlled by a mobile phone, whereby the bag performs Bluetooth communication with the mobile phone of a person who carries the bag, sounds an alarm when the Bluetooth communication is disconnected (when not in a paring mode), and gives an electric shock to an authorized person who touches the bag by allowing high-voltage current applied from power supply of the security bag to flow entirely in the bag. The bag providing a control method through paring with the mobile phone can safely manage important information assets by remotely controlling the alarm of the bag and locking/unlocking thereof. Further, when separated a predetermined distance from a manager, the security bag transmits a warning signal to the mobile phone, sounds the alarm of the bag, and generates high-voltage current on the bag when forcibly opened, thereby preventing security documents from being stolen.

Abstract: An intra-oral x-ray system combines several tube voltages with varying differences by a pulse method and emits the voltages in one x-ray irradiation to obtain an x-ray imaging with clear contrast. Before x-ray irradiation, the user can preset and save the tube voltage data in the x-ray system by the size of the patient, the area, the purpose of diagnosis and the detector sensitivity. The user can select the saved data or with discretion change the exposure conditions.

Abstract: The high voltage tube tank of x-ray system is embodied by miniaturizing the portable x-ray system for better mobility and portability. The high voltage tube tank of portable x-ray system comprising of an xray tube for generating x-rays, a high voltage transformer for generating high voltage, a high voltage rectification circuit for transforming and boosting AC voltage to DC voltage, and a housing for storing the apparatuses thereof, is configured in such a way that the high voltage rectification circuit is comprised of multiple high voltage capacitors linearly aligned on both sides of the circuit board and the high voltage diode built between the confronting high voltage capacitors, wherein the x-ray tube is placed between the high voltage capacitors thereof.

Abstract: The invention relates to an electronic security bag controlled by a mobile phone, whereby the bag performs Bluetooth communication with the mobile phone of a person who carries the bag, sounds an alarm when the Bluetooth communication is disconnected (when not in a paring mode), and gives an electric shock to an authorized person who touches the bag by allowing high-voltage current applied from power supply of the security bag to flow entirely in the bag. The bag providing a control method through paring with the mobile phone can safely manage important information assets by remotely controlling the alarm of the bag and locking/unlocking thereof. Further, when separated a predetermined distance from a manager, the security bag transmits a warning signal to the mobile phone, sounds the alarm of the bag, and generates high-voltage current on the bag when forcibly opened, thereby preventing security documents from being stolen.

Abstract: Disclosed is a novel method for producing an expanded graphite which can be utilized for oil adsorbents, gaskets, packing sheets, adsorbents of volatile organic compounds and the like. SO3-graphite interlayer compound is formed by contacting graphite particles with SO3 generated from fuming sulfuric acid or anhydrous sulfuric acid. Excessive SO3 condensed on SO3-graphite interlayer compound is separated. Then, energy is applied to SO3-graphite interlayer compound to expand the graphite. An acid containing a single component can be continuously reused thus reducing the amount of the acid to {fraction (1/10)}-{fraction (1/100)} of that of an acid mixture used in the conventional method. As a result, the generation of a large amount of environmentally hazardous acid waste can be markedly reduced.