Abstract: Provided is an image forming apparatus which includes a developer to develop an image and a developer contact medium of which a surface contacts the developer, wherein asperities with a density of about 4×108 to about 200×108 pcs/cm2 are formed to form roughness on the surface of the developer contact medium.

Abstract: An image forming system includes a first developing unit to form an image using a dry developer and a second developing unit to form an image using a wet developer. The first developing unit forms an image using yellow, magenta, cyan and black developers, and the second developing unit forms an image using a developer having lighter colors than the yellow, magenta, cyan and black developers. Therefore, light colors requiring high resolution and high definition may be printed using a wet type image forming module capable of easily expressing the light colors, and original and dark colors may be printed using a dry image forming module. Hence, it is possible to print a color image having high resolution and high definition, and enhance the color reproducibility of the image.

Abstract: Provided is an image forming apparatus which includes a developer to develop an image and a developer contact medium of which a surface contacts the developer, wherein asperities with a density of about 4×108 to about 200×108 pcs/cm2 are formed to form roughness on the surface of the developer contact medium.

Abstract: An image forming system includes a first developing unit to form an image using a dry developer and a second developing unit to form an image using a wet developer. The first developing unit forms an image using yellow, magenta, cyan and black developers, and the second developing unit forms an image using a developer having lighter colors than the yellow, magenta, cyan and black developers. Therefore, light colors requiring high resolution and high definition may be printed using a wet type image forming module capable of easily expressing the light colors, and original and dark colors may be printed using a dry image forming module. Hence, it is possible to print a color image having high resolution and high definition, and enhance the color reproducibility of the image.

Abstract: Disclosed are two terminal bistable memory cells having least two high-spin polarization magnetic material junctions which are separated from one another by electron trap site defect containing insulator. The two terminal bistable memory cells demonstrate stable, low current readable, hysteretic resistance states which are set by the flow of a relatively high, (eg. a milliamp or less), plus or minus polarity D.C. current therethrough, which resistance is monitored by lower magnitude A.C. or D.C. current flow therethrough. Preferred cells have at least one CrO2/Cr2O3/CrO2 sequence but typically have multiple CrO2/Cr2O3/CrO2 sequences in series.