Abstract: The present invention relates to a method for preparing a polyolefin block copolymer, the method comprising: a first step of coordination polymerization of an olefin monomer with a transition metal catalyst in the presence of organozinc; and a second step of continuously adding a diacyl peroxide compound to perform polymerization, and to a polyolefin block copolymer prepared therefrom.

Abstract: Disclosed are a method and apparatus for reusing wastewater. The method for reusing wastewater disclosed herein includes: generating a mixed wastewater by mixing multiple types of wastewater (S20); performing a first purification by passing the mixed wastewater through a flocculation-sedimentation unit (S40); performing a second purification by passing an effluent of the flocculation-sedimentation unit through a membrane bioreactor (MBR) (S60); performing a third purification by passing an effluent of the MBR through a reverse-osmosis membrane unit (S80); and reusing an effluent of the reverse-osmosis membrane unit as cooling water or industrial water (S100).

Abstract: The present invention can provide light-colored magnetic particles having a zirconium oxide coating layer formed on a magnetic core, and having a silver coating layer formed on the zirconium oxide coating layer, and a part of the surface of the zirconium oxide coating layer is exposed to the outside, but chemical resistance is excellent, and thus the magnetic particles hardly cause a change of magnetic characteristics so as to be suitable for security elements.

Abstract: The present invention relates to a security device comprising a colloidal crystal which exhibits excellent visibility and is also easily manufactured. The security device, according to the present invention, comprises: a substrate; a groove part formed on the substrate; a colloidal crystal positioned in the groove part; and an aging film. The security device, according to the present invention, exhibits excellent security and visibility, and thus may be used for securities, credit cards, security cards, anti-forgery products, etc.

Abstract: A printing method performed by an image forming apparatus is provided. The image forming apparatus receives job information of content, and generates payment amount information based on the job information of the content. The image forming apparatus receives payment method information from a user, and generates billing information by using the payment amount information and the payment method information. The image forming apparatus transmits the billing information to a payment system.

Abstract: The present invention relates to a security device comprising a colloidal crystal which exhibits excellent visibility and is also easily manufactured. The security device, according to the present invention, comprises: a substrate; a groove part formed on the substrate; a colloidal crystal positioned in the groove part; and an aging film. The security device, according to the present invention, exhibits excellent security and visibility, and thus may be used for securities, credit cards, security cards, anti-forgery products, etc.

Abstract: A photonic crystal film, a method for manufacturing the photonic crystal film, and an anti-forgery article comprising the photonic crystal film are disclosed. The photonic crystal film includes a polyurethane-based polymer matrix and colloidal particles dispersed in the polyurethane-based polymer matrix and arranged in a crystal lattice structure. The colloidal particles includes one or more selected from metal nanoparticles, metal oxide nanoparticles, organic nanoparticles, and carbon structure nanoparticles.

Abstract: AlNiCo-based magnetic particles according to the present invention are hard magnetic particles each including: a core particle containing Al, Ni, and Co; and an inorganic shell enclosing the core particle. The core particle is an ultra-fine particle having D50 of smaller than 12 ?m, D50 being particle size corresponding to 50% in the core particle diameter cumulative distribution.

Abstract: The present invention can provide light-colored magnetic particles having a zirconium oxide coating layer formed on a magnetic core, and having a silver coating layer formed on the zirconium oxide coating layer, and a part of the surface of the zirconium oxide coating layer is exposed to the outside, but chemical resistance is excellent, and thus the magnetic particles hardly cause a change of magnetic characteristics so as to be suitable for security elements.

Abstract: A printing method performed by an image forming apparatus is provided. The image forming apparatus receives job information of content, and generates payment amount information based on the job information of the content. The image forming apparatus receives payment method information from a user, and generates billing information by using the payment amount information and the payment method information. The image forming apparatus transmits the billing information to a payment system.

Abstract: The present invention relates to a micro-fluid chip for blood vessel formation. The micro-fluid chip of the present invention is constituted by first to fifth channels arranged adjacent to one another on a substrate in sequence, and two or more micro-structures or micro-posts having a gap therebetween are disposed on the interface that each channel forms together with an adjacent channel while contacting the same. Each channel performs a fluidic interaction with a different channel through the gap formed by the micro-structures, and biochemical materials can move therethrough. The micro-fluid chip, according to the present invention, provides a micro-blood vessel having a flat and continuous blood vessel interface outside a body. Furthermore, cancer angiogenesis, cancer intravasation, and cancer extravasation can be modeled using the micro-fluid chip of the present invention. In addition, the micro-fluid chip of the present invention can be used to screen candidate anti-cancer drugs.

Abstract: Provided is a cloud providing a cloud service for displaying content, the cloud including: a first server configured to receive a sharing request for content, from an electronic device; a second server configured to determine whether the content is displayable on a display device connected to the cloud, based on a type of a file format of the content; a third server configured to render the content and generate an image file from the rendered content, when it is determined that the content is not displayable; and a fourth server configured to control display of one of the content and the image file on the display device.

Abstract: A management apparatus and a billing method which calculates a billing charge by using a cumulative output amount for a target billing period. In the management apparatus and billing method a billing charge is calculated by using a cumulative output amount for a target billing period, a cumulative output amount quota having the cumulative output amount for the target billing period, and a quota unit price corresponding to the cumulative output amount quota of at least one image forming apparatus.

Abstract: A method of controlling printing of a server apparatus is provided. The method includes: receiving printing data, receiving error information from at least one image forming apparatus; determining an error state level corresponding to the error information among a plurality of error state levels; and when the determined error state level is an allowed level to print, transmitting the printing data to the image forming apparatus and deleting the stored printing data, and when the error state level is a disallowed level, not transmitting the printing data.

Abstract: A method for warehouse reorganization includes determining, by a warehouse management device, an item to be relocated; retrieving, by the warehouse management device, a plurality of load cells on which the determined item is loaded and to which a merge task has not been applied; and generating, by the warehouse management device, a merge task of merging a reference load cell having the highest loading rate among the plurality of load cells with a target load cell having the lowest loading rate among the plurality of load cells.

Abstract: Provided is a cloud providing a cloud service for displaying content, the cloud including: a first server configured to receive a sharing request for content, from an electronic device; a second server configured to determine whether the content is displayable on a display device connected to the cloud, based on a type of a file format of the content; a third server configured to render the content and generate an image file from the rendered content, when it is determined that the content is not displayable; and a fourth server configured to control display of one of the content and the image file on the display device.

Abstract: A method of controlling printing of a server apparatus is provided. The method includes: receiving printing data, receiving error information from at least one image forming apparatus; determining an error state level corresponding to the error information among a plurality of error state levels; and when the determined error state level is an allowed level to print, transmitting the printing data to the image forming apparatus and deleting the stored printing data, and when the error state level is a disallowed level, not transmitting the printing data.

Abstract: A method of charging for printing including setting a basic charge in the image forming apparatuses, receiving information about a recording agent installed in the image forming apparatus at predetermined intervals, determining whether or not the recording agent of the image forming apparatuses is replaced, based on the received information about the recording agent, counting a number of times the recording agent of the image forming apparatuses is replaced in a charging period, based on the determination as to whether or not the recording agent is replaced, and calculating a printing cost for the image forming apparatuses, using the counted number of times the recording agent is replaced and the basic charge as set.

Abstract: A method of managing errors of at least one image forming apparatus, the method involving collecting information regarding the errors disrupting normal operation of the at least one image forming apparatus, analyzing the severity of each of the errors based on the collected information, and outputting a severity analysis result for each of the errors.

Abstract: An image forming apparatus management server, a Service Continuity Score (SCS) calculating method of the management server, and an image forming apparatus management system. A setup manager sets a priority with respect to items required to calculate an SCS indicative of a normal operation time of an image forming apparatus, an incident manager registers and manages an incident related to the image forming apparatus, and an SCS manager calculates the SCS using the registered incident and the priority set for the items.