Abstract: A heating and air purifying apparatus using electronic device heat includes: a cabinet accommodating electronic devices including a central processing unit (CPU), a graphic processing unit (GPU), a power supply unit (PSU), and a main board, having an air inlet on a side, and having an air outlet on a top; one or more partition plates disposed vertically, horizontally, or diagonally across the inner surface of the cabinet; and a discharge fan installed at the air outlet and discharging air in the cabinet to the outside, in which a cooling fan of the GPU is disposed on a side of the one or more partition plate, a GPU body including a graphic card of the GPU is disposed on the opposite side, and the CPU, the PSU, and the main board are accommodated in a space facing a side of the one or more partition plate.

Abstract: A heating and air purifying apparatus using electronic device heat includes: a cabinet accommodating electronic devices including a central processing unit (CPU), a graphic processing unit (GPU), a power supply unit (PSU), and a main board, having an air inlet on a side, and having an air outlet on a top; one or more partition plates disposed vertically, horizontally, or diagonally across the inner surface of the cabinet; and a discharge fan installed at the air outlet and discharging air in the cabinet to the outside, in which a cooling fan of the GPU is disposed on a side of the one or more partition plate, a GPU body including a graphic card of the GPU is disposed on the opposite side, and the CPU, the PSU, and the main board are accommodated in a space facing a side of the one or more partition plate.

Abstract: A card authorization terminal system of present invention includes a card identifying unit, a database management unit, and an authorization processing unit. The card identifying unit deciphers card property information stored in a card and determines whether the card is valid. The database management unit determines final card property information based on the card property information deciphered by the card identifying unit and property change information stored in the database management unit. The authorization processing unit calculates charges and processes card transactions based on the final card property information generated by the database management unit.

Abstract: A card authorization terminal system of present invention includes a card identifying unit, a database management unit, and an authorization processing unit. The card identifying unit deciphers card property information stored in a card and determines whether the card is valid. The database management unit determines final card property information based on the card property information deciphered by the card identifying unit and property change information stored in the database management unit. The authorization processing unit calculates charges and processes card transactions based on the final card property information generated by the database management unit.

Abstract: The present invention relates to a card authorization terminal system and an electronic card processing method using the card authorization terminal system. An authorization terminal system includes an exclusive database management system to update and delete property change information, and a card processing method uses the authorization terminal system. In the card processing method, since a physical memory area is efficiently managed, a problem of memory capacity limitation is solved, a processing speed delay caused by a file processing structure is improved, and various pieces of information may be managed.

Abstract: A card authorization terminal system of present invention includes a card identifying unit, a database management unit, and an authorization processing unit. The card identifying unit deciphers card property information stored in a card and determines whether the card is valid. The database management unit determines final card property information based on the card property information deciphered by the card identifying unit and property change information stored in the database management unit. The authorization processing unit calculates charges and processes card transactions based on the final card property information generated by the database management unit.

Abstract: A yeast extract or yeast-derived bioactive peptide having an activity of selectively inhibiting reuptake of serotonin and norepinephrine, which can be effectively used in preventing or treating various diseases related to reuptake of serotonin and norepinephrine, especially depression, anxiety, stress, fatigue and obesity are provided. Also, a yeast extract or yeast-derived bioactive peptide having activities as an anti-stress agent, an anti-fatigue agent, premenstrual syndrome (PMS) and menstrual pain relaxants, and a brain-neurotrophic factor, and a method for preparing the bioactive peptide are provided. The yeast extract or yeast-derived bioactive peptide is effective in relieving stress, nervousness, anxiety, tension, insomnia, fatigue, and imbalance in the autonomic nerve regulation.

Abstract: A resonant-tunnelling hot transistor includes buffer layers undoped with impurities on either side of a collector or an emitter potential barrier having a quantum well structure. When a voltage is applied to the transistor, most of the potential drop occurs at the first buffer layer and the second buffer layer due to their thickness. This enables the inclination of the energy band of the collector barrier layer or the emitter barrier layer to be diminished, whereby the energy of the confined energy state E.sub.QW of the quantum well and the energy change of the confined state is diminished. In addition, the NDR region of I-V characteristics curve can be moved by controlling the biasing voltage, and the wave form of the curve maintains its original form.