Abstract: A magnetic track includes first and second magnetic domain regions having different lengths and different magnetic domain wall movement speeds. A longer of the first and second magnetic domain regions serves as an information read/write region. An information storage device includes a magnetic track. The magnetic track includes a plurality of magnetic domain regions and a magnetic domain wall region formed between neighboring magnetic domain regions. The plurality of magnetic domain regions includes a first magnetic domain region and at least one second magnetic domain region having a smaller length than the first magnetic domain region. The information storage device further includes a first unit configured to perform at least one of an information recording operation and an information reproducing operation on the first magnetic domain region, and a magnetic domain wall movement unit configured to move a magnetic domain wall of the magnetic domain wall region.

Abstract: Provided is a cross-point latch and a method of operating the cross-point latch. The cross-point latch includes a signal line, two control lines crossing the signal line, and unipolar switches disposed at crossing points between the signal line and the control lines.

Abstract: A rotary compressor has two compression capacities according to two different rotational directions of the driving shaft. The rotary compressor includes a driving shaft with an eccentric portion. A roller rotates on the shaft along an inner circumference of the cylinder. A vane installed in the cylinder continuously contacts the roller. An upper and a lower bearing are respectively disposed on the top and bottom of the cylinder. A disc shaped valve rotates between two positions and has at least one suction port for selectively supplying refrigerant inside the compression chamber according to the rotational direction of the driving shaft and at least one discharge port communicates with the compression chamber for discharging the compressed refrigerant. The refrigerant is supplied through a communication hole to a port formed on the outer valve.

Abstract: A capacity variable type twin rotary compressor may include a casing, a motor, a first cylinder having a first compression space, a second cylinder fixed to one side of the first cylinder and having a second compression space, first and second intakes respectively formed in the first and second cylinders and each connected to a gas intake pipe, first and second vane slits respectively formed in the first and second intakes first and second rolling pistons eccentrically coupled to the motor and respectively housed in the first and second compression spaces, first and second vanes slidingly received in the first and second vane slits, respectively, an expansion groove formed at the second vane slit separate from the inner space of the casing, and refrigerant switching valves that allow refrigerant of intake and discharge pressures to be supplied into the second compression space and the expansion groove, such that the second vane contacts the second rolling piston to perform a power driving or separates therefr

Abstract: An information storage device includes a magnetic track and a magnetic domain wall moving unit. The magnetic track has a plurality of magnetic domains and a magnetic domain wall between each pair of adjacent magnetic domains. The magnetic domain wall moving unit is configured to move at least the magnetic domain wall. The information storage device further includes a magneto-resistive device configured to read information recorded on the magnetic track. The magneto-resistive device includes a pinned layer, a free layer and a separation layer arranged there between. The pinned layer has a fixed magnetization direction. The free layer is disposed between the pinned layer and the magnetic track, and has a magnetization easy axis, which is non-parallel to the magnetization direction of the pinned layer.

Abstract: Provided are an information storage device and a method of operating the same. The information storage device includes: a magnetic layer having a plurality of magnetic domain regions and a magnetic domain wall interposed between the magnetic domain regions; a first unit disposed on a first region which is one of the plurality of magnetic domain regions for recording information to the first region; a second unit connected to the first unit for inducing a magnetic field so as to record information to the first region.

Abstract: An oscillator includes: a plurality of free layers and a non-magnetic layer disposed between the plurality of free layers. Each of the plurality of free layers has perpendicular magnetic anisotropy or in-plane magnetic anisotropy. Magnetization directions of the free layers are periodically switched such that a signal within a given frequency band oscillates.

Abstract: A compressor is provided that includes a supplementary torque providing part that reduces a speed of a piston compression of refrigerant and increases the speed of the piston in drawing of the refrigerant. This structure reduces a compression rate of the refrigerant in compression relatively, and increases a re-expansion rate, to maximize suction efficiency.

Abstract: A magnetic memory device includes a track in which different non-magnetic layers are respectively formed on upper and lower surfaces of a magnetic layer. One of the two non-magnetic layers includes an element having an atomic number greater than or equal to 12. Accordingly, the magnetic layer has a relatively high non-adiabaticity (?).

Abstract: A rotary compressor includes a driving shaft having an eccentric portion, a cylinder, and a roller installed on an outer circumference of the eccentric portion to contact an inner circumference of the cylinder, performing a rolling motion along the inner circumference and forming a fluid chamber to suck and compress fluid along with the inner circumference. A vane is installed elastically in the cylinder to contact the roller continuously. Discharge ports communicate with the fluid chamber. Suction ports communicate with the fluid chamber and are spaced apart from each other by a predetermined angle. A valve assembly selectively opens any one of the suction ports according to a rotation direction of the driving shaft. Compression spaces having different volumes are formed in the fluid chamber according to the rotation direction of the driving shaft such that two different compression capacities are formed.

Abstract: An information storage device includes a magnetic layer configured to store information, a first and second conductive layer. The first conductive layer contacts a first end of the magnetic layer. The second conductive layer contacts a second end of the magnetic layer. The magnetic layer includes first and second pinning regions at which magnetic domain walls are pinned. The widths of the magnetic layer at the first and second pinning regions are different.

Abstract: An oscillator generates a signal using precession of a magnetic moment of a magnetic domain wall. The oscillator includes a free layer having the magnetic domain wall and a fixed layer corresponding to the magnetic domain wall. A non-magnetic separation layer is interposed between the free layer and the fixed layer.

Abstract: A rotary compressor includes a driving shaft rotatable clockwise and counterclockwise, and an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion to contact an inner circumference of the cylinder; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for supporting the driving shaft rotatably; a second bearing rotatably supporting the driving shaft and preliminarily storing the fluid to be sucked; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by predetermined angle from each other, wherein compression spaces that have different volumes from each other are formed in the fluid chamber according to the rotation direction of the driving shaft so that two different compression capacities are formed.

Abstract: A rotary compressor for changing a compression capacity of the compressor includes a driving shaft being rotatable clockwise and counterclockwise, and having an eccentric portion of a predetermined size; a cylinder forming a predetermined inner volume; a roller installed rotatably on an outer circumference of the eccentric portion so as to contact an inner circumference of the cylinder; a vane installed elastically in the cylinder to contact the roller continuously; a first bearing installed in the cylinder, for rotatably supporting the driving shaft; a second bearing installed in the cylinder, for rotatably supporting the driving shaft and guiding the fluid into the fluid chamber; discharge ports communicating with the fluid chamber; and a valve assembly having openings separated by a predetermined angle from each other, the valve assembly having a center which is eccentrically installed by a predetermined distance from a center of the cylinder.

Abstract: An information storage device includes a magnetic structure having a buffer track and a plurality of storage tracks connected to the buffer track. A write/read unit is disposed on the magnetic structure, and a plurality of switching devices are respectively connected to the buffer track, the plurality of storage tracks, and the write/read unit. The switching devices that are respectively connected to the buffer track and the storage tracks. The information storage device further includes a circuit configured to supply current to at least one of the magnetic structure and the write/read unit.

Abstract: A magnetic structure includes a first portion and a plurality of second portions. The first portion extends in a first direction. The plurality of second portions extend from ends of the first portion in a second direction. The first and second directions are perpendicular to one another. Two magnetic domains magnetized in directions opposite to each other and a magnetic domain wall between the magnetic domains are formed in the magnetic structure.

Abstract: An information storage device includes a memory region having a magnetic track and a write/read unit, and a control circuit connected to the memory region. First and second switching devices are connected to both ends of the magnetic track, and a third switching device is connected to the write/read unit. The control circuit controls the first to third switching devices, and supplies operating current to at least one of the magnetic track and the write/read unit.

Abstract: A magnetic track includes first and second magnetic domain regions having different lengths and different magnetic domain wall movement speeds. A longer of the first and second magnetic domain regions serves as an information read/write region. An information storage device includes a magnetic track. The magnetic track includes a plurality of magnetic domain regions and a magnetic domain wall region formed between neighboring magnetic domain regions. The plurality of magnetic domain regions includes a first magnetic domain region and at least one second magnetic domain region having a smaller length than the first magnetic domain region. The information storage device further includes a first unit configured to perform at least one of an information recording operation and an information reproducing operation on the first magnetic domain region, and a magnetic domain wall movement unit configured to move a magnetic domain wall of the magnetic domain wall region.

Abstract: Provided are information storage devices using movement of magnetic domain walls and methods of operating information storage devices. An information storage device includes a magnetic track and an operating unit. The magnetic track includes a plurality of magnetic domains separated by magnetic domain walls. The size of the operating unit is sufficient to cover at least two adjacent magnetic domains. And, the operating unit may be configured to write/read information to/from a single magnetic domain as well as a plurality of magnetic domains of the magnetic track.

Abstract: An information storage device includes a storage node, a write unit configured to write information to a first magnetic domain region of the storage node, and a read unit configured to read information from a second magnetic domain region of the storage node. The information storage device further includes a temporary storage unit configured to temporarily store information read by the read unit, and a write control unit electrically connected to the temporary storage unit and configured to control current supplied to the write unit. The information read from the second magnetic domain region is stored in the temporary storage unit and written to the first magnetic domain region.