Hitachi, Ltd.

Other

Hitachi Plant Technologies, Ltd.

Renesas Electronics Corporation

Kawasaki Steel Corporation

Unisia Jecs Corporation

Takayuki Matsumoto

Toshiaki Matsuo

Naruyasu Okamoto

Ryuuji Kajiya

Satoshi Uenosono

Shigeru Unami

Takashi Nishi

Masami Matsuda

Mamoru Mizumoto

Takashi Yoshimura

Masashi Fujinaga

Atsushi Yukita

Mitsumasa Iijima

Yasuo Hatai

Hiroyuki Amma

The memory controller is provided with a refresh clock generation unit, a control signal generation unit, and a refresh request generation unit. The refresh clock generation unit generates a clock obtained by frequency dividing a system clock, as a refresh clock. The control signal generation unit issues a refresh command to a memory, based on the refresh clock. The refresh request generation unit curtails, based on a specified refresh count in a specified refresh period determined by the memory, a supply to the control signal generation unit of a redundant refresh clock generated exceeding the specified refresh count, the refresh clock being generated within the specified refresh period.

Memory controller, memory control method, and memory control system

A polymerization processor synthesizes a high quality polymer from a raw material in a molten state. Lactide sent from an apparatus for supplying lactideis heated and molten in an apparatus for melting lactide, and a catalyst is added to the lactide in an apparatus for supplying a catalyst. The molten lactide is supplied through an apparatus for supplying lactideto a horizontal reaction tank, and flows by a head difference with a polymerization reaction proceeding. A discharged reaction solution is supplied to the upper part of a vertical reaction tank, and flows through the vertical reaction tankby gravity with the polymerization reaction proceeding. Thereafter, the reaction solution is transported to an apparatus for removing remaining lactide, where unreacted lactide is removed, and then the reaction solution is discharged.

Polymerization processor

A polymerization method comprises, prior to polymerization of a monomer of the cyclic dimer of alpha-hydroxycarboxylic acid, a first mixture of a polymerization catalyst by bypassing a part of the monomer of the cyclic dimer is prepared. Then, the first mixture is mixed with a dominant amount of the monomer introduced into a polymerization reactor. The monomer of the cyclic dimer in the polymerization reactor is conducted in the presence of a polymerization initiator.

Polymerization method and polymerization apparatus

The object of the present invention is to provide a polymer alloy including polylactic acid which can be used in the same manner as conventional commodity plastics even in an environment of high temperature and high humidity. According to the present invention, there is provided a polymer alloy including polylactic acid comprising (A) a polylactic acid, (B) a polyalkylacrylic ester and/or a polyvinyl ester, (C) a polyolefin and (D) a block copolymer of a polyalkylacrylic ester and polyolefin and/or a block copolymer of a polyvinyl ester and a polyolefin.

Polymer alloy including polylactic acid

In a preliminary molding step, a metallic powder mixtureobtained by blending an iron-based metal powderwith graphitesuch that the graphite is present in an amount of preferably not less than 0.1% by weight, more preferably not less than 0.3% by weight, is compacted into a preformhaving a density of not less than 7.3 g/cm. In a provisional sintering step, the preformis provisionally sintered at a predetermined temperature to form a metallic powder-molded bodyhaving a structure in which the graphite remains along a grain boundary of the metal powder. In a re-compaction step, the metallic powder-molded bodyis re-compacted into a re-compacted body. In a re-sintering step, the re-compacted bodyis re-sintered to obtain a sintered body. In a heat treatment step, the sintered bodyis heat-treated to obtain a heat-treated sintered body Accordingly, in accordance with the present invention, there are provided a re-compacted body produced from a metallic powder-molded body having an excellent deformability which is suitably applied to the production of machine parts exhibiting high mechanical properties due to the use of sintered metal, and a sintered body produced from the re-compacted body as well as a process for the production thereof.

Metallic powder-molded body, re-compacted body of the molded body, sintered body produced from the re-compacted body, and processes for production thereof

Radioactive laundry liquid wastes are supplied in a liquid waste heating vessel. Hydrogen peroxide and an alkali solution are supplied to the liquid waste heating vessel. The pH of the radioactive laundry liquid wastes is adjusted to 7 or higher by the alkali solution. The radioactive laundry liquid wastes are heated to 50&deg; C. or higher by a heating device and introduced to first and second aeration vessels. The temperature is controlled by a device in accordance with the value measured by a thermometer. Ozone is supplied from an ozone generator by way of an ozone gas discharge port to the first aeration vessel. Ozone discharged from the first aeration vessel is introduced from the ozone gas discharge port to the second aeration vessel. Therefore, the amount of ozone dissolved into the radioactive laundry liquid wastes is increased so that the amount of hydroxy radicals formed for decomposing organic substances increases, since the laundry liquid wastes are heated to 50&deg; C. or higher under the presence of hydrogen peroxide.

Method of and apparatus for treating radioactive liquid wastes containing surface active agents

Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof

Radioactive laundry liquid wastes are supplied in a liquid waste heating vessel. Hydrogen peroxide and an alkali solution are supplied to the liquid waste heating vessel. pH of radioactive laundry liquid wastes is adjusted to 7 or higher by the alkali solution. The radioactive laundry liquid wastes are heated to 50&deg; C. or higher by a heating device. The heated radioactive laundry liquid wastes are introduced to first and second aeration vessels. Ozone is supplied from an ozone generator by way of an ozone gas discharge port to the first aeration vessel. Ozone discharged from the first aeration vessel is introduced from the ozone gas discharge port to the second aeration vessel. Therefore, the amount of ozone dissolved into the radioactive laundry liquid wastes is increased so that the amount of hydroxy radicals formed for decomposing organic substances increases, since the laundry liquid wastes are heated to 50&deg; C. or higher under the presence of hydrogen peroxide.

Method of treating radioactive liquid wastes containing surface active agents

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Hitachi, Japan

Takayuki Matsumoto