Abstract: Disclosed is a carbon dioxide capture system which includes a first carbon dioxide adsorption/desorption section including a first carbon dioxide adsorption section, a first carbon dioxide desorption section connected to the first carbon dioxide adsorption section, and a first carbon dioxide adsorbent circulating through the first carbon dioxide adsorption section and the first carbon dioxide desorption section; and a second carbon dioxide adsorption/desorption section including a second carbon dioxide adsorption section, a second carbon dioxide desorption section connected to the second carbon dioxide adsorption section, and a second carbon dioxide adsorbent circulating through the second carbon dioxide adsorption section and the second carbon dioxide desorption section.

Abstract: Disclosed are a molecular sieve catalyst and a preparation method thereof to produce light olefins from cracking naphtha catalytically in severe environments of high temperature and high moisture. In detail, the catalyst is prepared by spray-drying and calcining the mixed slurry, in which 0.01˜5.0 wt % of MnO2 and 1˜15 wt % of P2O5 are simultaneously imbedded in catalyst which consists of zeolite, clay and inorganic complex. According to the present invention, the method that manganese and phosphate are imbedded simultaneously in zeolite and inorganic complex is used to increases thermal-stability of obtained spherical catalyst, and increase olefin yield of cracking hydrocarbon such as naphtha by protecting acid-site of zeolite. To synthesize the required catalyst, the important procedures are mixing ratio and mixing sequence of Mn, P, zeolite, and inorganic complex.

Abstract: Disclosed are a molecular sieve catalyst and a preparation method thereof to produce light olefins from cracking naphtha catalytically in severe environments of high temperature and high moisture. In detail, the catalyst is prepared by spray-drying and calcining the mixed slurry, in which 0.01˜5.0 wt % of MnO2 and 1˜15 wt % of P2O5 are simultaneously imbedded in catalyst which consists of zeolite, clay and inorganic complex. According to the present invention, the method that manganese and phosphate are imbedded simultaneously in zeolite and inorganic complex is used to increases thermal-stability of obtained spherical catalyst, and increase olefin yield of cracking hydrocarbon such as naphtha by protecting acid-site of zeolite. To synthesize the required catalyst, the important procedures are mixing ratio and mixing sequence of Mn, P, zeolite, and inorganic complex.

Abstract: A mobile terminal and a method for searching for a home network for the mobile terminal are provided. The method includes performing a full scan for searching for the home network at a certain time after roaming to a visited network, initializing a count of a number of times a timer has expired when the home network is not found, initiating the timer, updating the count when the timer expires, scanning frequencies in a frequency list when the count is less than a certain value, and scanning all frequencies around the mobile terminal when the count is equal to the certain value.

Abstract: Disclosed herein is a dome security camera. The camera includes a housing having a circuit part. A hemispherical cover is coupled to the housing. A camera module includes a casing which has a lens mounted on a central portion thereof and coupled to a barrel, a plurality of LEDs, and a sensor. A bracket is provided in the housing and coupled to the casing in such a way that it is rotated and open or closed. The casing has a hemispherical shape, and an annular coupling step is provided on a lower end of the casing. The bracket is a cylindrical member having an opening on an upper end thereof, and includes an enlarged part provided on the upper end of the opening and coupled to the casing, and a cut groove formed by cutting a side surface of the bracket, with a knob inserted into the cut groove.

Abstract: Disclosed herein is a method of preparing ZSM-5, including: providing a nanocrystalline ZSM-5 seed having a size of 70˜300 nm; adding the nanocrystalline ZSM-5 seed to a stock solution including water glass as a silica source, an alumina source, a neutralizer and water to form a reaction mixture; and maintaining the reaction mixture at 150˜200° C. to crystallize the reaction mixture. The method is advantageous in that ZSM-5 having small and uniform crystal sizes and including no impurities can be synthesized in a short period of time.

Abstract: Disclosed herein is a dome security camera. The camera includes a housing having a circuit part. A hemispherical cover is coupled to the housing. A camera module includes a casing which has a lens mounted on a central portion thereof and coupled to a barrel, a plurality of LEDs, and a sensor. A bracket is provided in the housing and coupled to the casing in such a way that it is rotated and open or closed. The casing has a hemispherical shape, and an annular coupling step is provided on a lower end of the casing. The bracket is a cylindrical member having an opening on an upper end thereof, and includes an enlarged part provided on the upper end of the opening and coupled to the casing, and a cut groove formed by cutting a side surface of the bracket, with a knob inserted into the cut groove.

Abstract: A dome type security camera structure with a reinforced waterproofing function is disclosed. The camera structure includes a housing (100) having an outside wire insert hole (110), and a pair of opposite guide grooves (120). Each guide groove communicates with an outside via a discharge hole (130). A mounting bracket (200) has a coupling protrusion (210) guided by each guide groove, and is gradually inclined outwards from a center thereof so that an edge thereof presses a lower surface of the housing and thus the mounting bracket is coupled to the housing. A holder (300) is provided on a lower surface of the mounting bracket in such a way as to perform rotation on 2 or 3 axes, with a camera module mounted to the holder. A dome screen (400) is mounted to the mounting bracket, and surrounds the holder.

Abstract: Disclosed herein is a mounting device for a security camera. In the mounting device, a mounting plate means is fastened and then a cover means is fitted into the mounting plate means when the security camera is mounted to a building, thus enabling easy and convenient installation. The mounting device includes a mounting plate means and a cover means. The mounting plate means includes a mounting plate having a plurality of mounting holes at regular intervals to mount the mounting plate means to a wall, and a pocket part integrally provided on a predetermined portion of the mounting plate and having an insert space. The cover means includes a body having on a central portion thereof a coupling sleeve, with a camera coupling means being coupled to the coupling sleeve. An insert part is integrally provided on the body and fitted into the insert space.

Abstract: A dome type security camera structure with a reinforced waterproofing function is disclosed. The camera structure includes a housing (100) having an outside wire insert hole (110), and a pair of opposite guide grooves (120). Each guide groove communicates with an outside via a discharge hole (130). A mounting bracket (200) has a coupling protrusion (210) guided by each guide groove, and is gradually inclined outwards from a center thereof so that an edge thereof presses a lower surface of the housing and thus the mounting bracket is coupled to the housing. A holder (300) is provided on a lower surface of the mounting bracket in such a way as to perform rotation on 2 or 3 axes, with a camera module mounted to the holder. A dome screen (400) is mounted to the mounting bracket, and surrounds the holder.

Abstract: Disclosed is a process for producing light olefins from hydrocarbon feedstock. The process is characterized in that a porous molecular sieve catalyst consisting of a product obtained by evaporating water from a raw material mixture comprising a molecular sieve with a framework of Si—OH—Al— groups, a water-insoluble metal salt, and a phosphate compound, is used to produce light olefins, particularly ethylene and propylene, from hydrocarbon, while maintaining excellent selectivity to light olefins. According to the process, by the use of a specific catalyst with hydrothermal stability, light olefins can be selectively produced in high yield with high selectivity from hydrocarbon feedstock, particularly full-range naphtha. In particular, the process can maintain higher cracking activity than the reaction temperature required in the prior thermal cracking process for the production of light olefins, and thus, can produce light olefins with high selectivity and conversion from hydrocarbon feedstock.

Abstract: A mobile terminal and a method for searching for a home network for the mobile terminal are provided. The method includes performing a full scan for searching for the home network at a certain time after roaming to a visited network, initializing a count of a number of times a timer has expired when the home network is not found, initiating the timer, updating the count when the timer expires, scanning frequencies in a frequency list when the count is less than a certain value, and scanning all frequencies around the mobile terminal when the count is equal to the certain value.

Abstract: Disclosed are a hydrothermally stable porous molecular sieve catalyst and a preparation method thereof. The catalyst consists of a product obtained by the evaporation of water from a raw material mixture comprising a molecular sieve having a framework of Si—OH—Al—, a water-insoluble metal salt and a phosphate compound. The catalyst maintains its physical and chemical stabilities even in an atmosphere of high temperature and humidity. Accordingly, the catalyst shows excellent catalytic activity even when it is used in a severe process environment of high temperature and humidity in heterogeneous catalytic reactions, such as various oxidation/reduction reactions, including catalytic cracking reactions, isomerization reactions, alkylation reactions and esterification reactions.