Toshiba Memory Corporation

Kabushiki Kaisha Toshiba

Kioxia Corporation

Tatsuya Zettsu

Yoshihisa Kojima

Katsuhiko Ueki

Takeshi Nagai

Hiroshi Yao

Kenichiro Yoshii

Osamu Torii

Toru Imai

Tatsunori Saito

Ikuo Magaki

Shigeyasu Natsubori

Toshiya Takahashi

Satoshi Akimoto

Ryota Yoshizawa

Masahiro Hayashi

Yasushi Unoki

Shinichiro Manabe

An information processing apparatus has an objective variable acquirer configured to acquire a multi-dimensional objective variable, an objective variable dimension compressor configured to compress the number of dimensions of the objective variable, an explanatory variable acquirer configured to acquire an explanatory variable, and an influence degree calculator configured to set at least one of a basis characterizing the objective variable and a coefficient weighting the basis as a new objective variable and calculate an influence degree on the new objective variable by using the explanatory variable.

Information processing apparatus, information processing method, and recording medium

A memory system includes a nonvolatile memory having memory blocks; and a controller configured to receive a request for writing user data from a host; select at least a first block having a first percentage of valid data among the memory blocks, determine a second percentage different from the first percentage on the basis of at least the first percentage of the valid data in the first block, determine a first ratio between a write amount of the user data in accordance with the request from the host and a write amount of the valid data in at least the first block on the basis of the second percentage determined, and write the user data and the valid data in the first block into the nonvolatile memory on the basis of the first ratio.

Memory system

According to one embodiment, a memory system is provided with a nonvolatile memory, a controller, a volatile memory and an address translation table. The address translation table includes a high level and a plurality of low levels. The high level indicates positions in the nonvolatile memory in which the low levels are recorded. The low levels indicate positions in the nonvolatile memory in which data is recorded. The controller holds the high level of the address translation table in the first area of the volatile memory, and shuts off the supply of power to the second area of the volatile memory based on a transition from a normal-power state to a low-power state.

Reduction of power use during address translation via selective refresh operations

A nonvolatile memory having memory blocks, and a controller configured to select a first block and a second block among the memory blocks, determine a third percentage on the basis of a first percentage of valid data in the first block and a second percentage of valid data in the second block, determine a first ratio between a write amount of user data in accordance with a request from a host and a write amount of the valid data in the first block on the basis of the third percentage, and write the user data and the valid data in the first block into the nonvolatile memory on the basis of the first ratio.

Memory system including a controller and a nonvolatile memory having memory blocks

According to one embodiment, a memory system includes a nonvolatile memory, a buffer, a battery and a processing circuit. The battery stores energy supplied from the outside. The processing circuit, after start of the supply of energy from the outside, starts the acceptance of a request from the outside, starts a process in accordance with the accepted request, and restricts the amount of data in the buffer referring to a voltage of the battery. The process uses the buffer.

Memory system including a battery powered buffer with a storage capacity of that buffer dependent on the voltage level of the battery

During normal power operation, an erased free block is prepared in nonvolatile memory so that at least one erased free block is continuously available as a standby block. If a power failure occurs, volatile data and its address conversion information are written into the standby block in the nonvolatile memory.

Memory device, control method for the memory device, and controller

An efficient retransmission control method, whereby a wasteful retransmission request and retransmission of a packet are not carried out when packet loss occurs. A receiving unit sends the received retransmission request information to a retransmission determining unit. When receiving the retransmission request information, the retransmission determining unit reads out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof from a packet information monitoring unit. The retransmission determining unit makes a determination as to whether or not to issue a retransmission request using the read-out refresh data time information, packet type information of the packet for which a retransmission request is issued, and the time information thereof.

Mobile terminal

An integrated network management and apparatus for managing devices connected to a network which have the same function. Control modules prepare local management tables by reading information regarding recordings made on respective recording media of the devices, and an integrated control module communicates with the control modules to prepare an integrated management table by reading the local management tables. The integrated management table enables the integrated control module to recognize a correlation between a recorded program and the control module, recording medium and recording position. The integrated control module also controls the control modules in the respective devices in an integrated manner using the integrated management table.

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Yokohama Kanagawa, Japan

Tatsuya Zettsu