Abstract: Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine, a communication apparatus to receive print data, and a processor to generate an intrinsic dot pattern for the print data, to generate a print image including the intrinsic dot pattern by using the generated intrinsic dot pattern and the print data, and to control the print engine to print the generated print image.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a print engine, a communication apparatus to receive print data, and a processor to generate an intrinsic dot pattern for the print data, to generate a print image including the intrinsic dot pattern by using the generated intrinsic dot pattern and the print data, and to control the print engine to print the generated print image.

Abstract: An image reading apparatus and a control method thereof are provided. The image reading apparatus includes a communication device configured to perform communication in a preset communication manner, a scanner configured to generate a scan image by scanning a manuscript, and at least one processor configured to control the communication device to transmit use information of the manuscript to an address corresponding to authorship information in response to a preset security pattern including the authorship information being detected in the generated scan image.

Abstract: An image reading apparatus and a control method thereof are provided. The image reading apparatus includes a communication device configured to perform communication in a preset communication manner, a scanner configured to generate a scan image by scanning a manuscript, and at least one processor configured to control the communication device to transmit use information of the manuscript to an address corresponding to authorship information in response to a preset security pattern including the authorship information being detected in the generated scan image.

Abstract: A method of managing programs that perform functions that have been previously performed according to a user setting regarding image forming job, based on user information by generating the programs that perform functions that have been previously performed according to the user setting; confirming user information of a user; and storing the generated programs with the confirmed user information and information regarding the generated programs in a storage unit.

Abstract: A method of managing programs that perform functions that have been previously performed according to a user setting regarding image forming job, based on user information by generating the programs that perform functions that have been previously performed according to the user setting; confirming user information of a user; and storing the generated programs with the confirmed user information and information regarding the generated programs in a storage unit.