Abstract: A method for collecting an iron-based powder includes the steps of; preparing a raw material powder containing a first metal powder containing 90% by mass or more of iron; forming a green compact by subjecting the raw material powder to uniaxial pressing using a die; machining the green compact; and collecting a second metal powder having an average particle diameter of 50 ?m or more and 500 ?m or less from machining chips generated in the step of machining.

Abstract: A method for producing a liquid phase sintered aluminum alloy member, includes: a compacting process of compacting a raw material powder containing an aluminum alloy powder containing at least one element selected from Si, Mg, Cu, and Zn, with the balance being Al and unavoidable impurities to form a green compact; a sintering process of subjecting the green compact to liquid phase sintering to give a sintered body; a softening process of subjecting the sintered body to a heat treatment to give a softened material; a straightening process of sizing the softened material to give a straightened material; and an aging process of subjecting the straightened material to a heat treatment to give an aged material in which precipitates are formed.

Abstract: A sintered body manufacturing method includes: a preparation step of preparing a raw material powder containing an iron-based metal powder; a molding step of subjecting the raw material powder to uniaxial pressing using a die to produce a green compact having an overall average relative density of 93% or more; a machining step of machining the green compact to produce a machined compact; and a sintering step of sintering the machined compact to obtain a sintered body.

Abstract: A method for producing a liquid phase sintered aluminum alloy member, includes: a compacting process of compacting a raw material powder containing an aluminum alloy powder containing at least one element selected from Si, Mg, Cu, and Zn, with the balance being Al and unavoidable impurities to form a green compact; a sintering process of subjecting the green compact to liquid phase sintering to give a sintered body; a softening process of subjecting the sintered body to a heat treatment to give a softened material; a straightening process of sizing the softened material to give a straightened material; and an aging process of subjecting the straightened material to a heat treatment to give an aged material in which precipitates are formed.

Abstract: A method for manufacturing a rigid internal gear of a wave gear device in which an internally toothed portion formed with internal teeth and a gear main body portion are joined integrally, the method including preforming an internal teeth-forming ring or disc for forming the internally toothed portion by using a first aluminum alloy powder; manufacturing a forging in which the internal teeth-forming ring or disc is placed in a forging die and is integrally formed on its outer side with the gear main body portion using a second aluminum alloy powder, the first aluminum alloy powder being harder and having higher abrasion resistance than the second aluminum alloy powder; and applying post-processing including cutting teeth to the forging.

Abstract: A method for manufacturing a rigid internal gear of a wave gear device in which an internally toothed portion formed with internal teeth and a gear main body portion are joined integrally, the method including preforming an internal teeth-forming ring or disc for forming the internally toothed portion by using a first aluminum alloy powder; manufacturing a forging in which the internal teeth-forming ring or disc is placed in a forging die and is integrally formed on its outer side with the gear main body portion using a second aluminum alloy powder, the first aluminum alloy powder being harder and having higher abrasion resistance than the second aluminum alloy powder; and applying post-processing including cutting teeth to the forging.

Abstract: The present invention provides a method for manufacturing a rigid internal gear for a wave gear device comprising an internally toothed portion and a gear main body portion comprised of different materials. In this method, a gear main body ring for forming a gear main body portion is preformed using a first aluminum alloy powder; an internal teeth-forming ring is preformed using a second aluminum alloy powder that has lower processability, is less durable, has higher abrasion resistance, and is harder than the first aluminum alloy powder; the internal teeth-forming ring is fitted inside the gear main body ring and the assembly is integrated by powder forging; and the resulting ring-shaped forging is subjected to post-processing, including cutting teeth. The gear main body portion and internally toothed portion are securely integrated by powder forging, and a lightweight rigid internal gear with high durability can therefore be obtained.

Abstract: An outer ring of a cross roller bearing is a composite component having an outer ring main body portion constructed of a lightweight metal alloy and a raceway surface formation portion linked to an inner side thereof and constructed of a ferrous material. A ring for forming the raceway surface formation portion is preformed, and is inserted into a forging die, powder forging is performed using a metal powder for manufacturing the outer ring main body portion, a composite component is manufactured in which a ringshaped portion for forming the outer ring main body portion is integrally formed with the raceway surface formation ring, and an after-treatment is performed on the product.

Abstract: A witness system using EDI (electronic data interchange) to perform efficient distribution and account settlement processes between selling and buying companies. A buying company makes documents according to delivery or order vouchers, and electronically sends the documents to a selling company via a notarization authority. The selling company compares the authentication documents with delivery or order vouchers the selling company issued, and, after determining that the documents are correct, executes a confirmation response to the notarization authority. The notarization authority registers the documents in the witness server's receipts detail table and notifies the buying and selling companies that the notarization authority authenticated the documents. This structure enables the making of accurate detailed payment statements when, for example, a detailed payment statement is made or a funds transfer is executed based on confirmed data.

Abstract: A witness system using EDI (electronic data interchange) to perform efficient distribution and account settlement processes between selling and buying companies. A buying company makes documents according to delivery or order vouchers, and electronically sends the documents to a selling company via a notarization authority. The selling company compares the authentication documents with delivery or order vouchers the selling company issued, and, after determining that the documents are correct executes a confirmation response to the notarization authority. The notarization authority registers the documents in the witness server's receipts detail table and notifies the buying and selling companies that the notarization authority authenticated the documents. This structure enables the making of accurate detailed payment statements when, for example, a detailed payment statement is made or a funds transfer is executed based on confirmed data.

Abstract: This invention provides a heat-resistant, high-toughness aluminum alloy which has a good balance between strength and ductility at a temperature from room temperature to around 300 degrees C. and has a high fracture toughness, a method of manufacturing the same, and engine parts. The heat-resistant, high-toughness aluminum alloy of this invention contains 10 to 16 mass. % of silicon, 1 to 3 mass % of iron, 1 to 2 mass % of nickel, 0.5 to 2 mass % in total of one or more selected from the group consisting of titanium, zirconium, chromium and vanadium, 0.6 to 3 mass % of copper, and 0.2 to 2 mass % of magnesium, the balance being essentially aluminum, and is obtained by densifying aluminum alloy powder prepared by gas atomizing. The silicon has an average grain diameter of 4 ?m or less.

Abstract: An optical pickup moves to the most inner circumference, then moves to outer circumference for a predetermined period and acquires address information there. Next, a difference XZ between the acquired address information and predetermined reference address information is calculated, and then difference YZ between address information which is acquired by performing above mentioned process in standard acceleration/deceleration control algorithm setting stage and the predetermined reference address information is calculated. Feed control amount is multiplied by a ratio between difference XZ and difference YZ.

Abstract: A user registration processor unit registers the user registration information to the database, which includes the public key certification acquired from the certification authority that has jurisdiction over each party by the request from the transaction party including seller, buyer, and transportation company. A transfer registration processor unit changes the access right holder and the cargo owner of the shipment information registered to the database at the start of transaction in compliance with the request for request for changing registration of the party with the digital signature and public key certification attached. A verification processor unit achieves the transfer registration with legal binding power by verifying that the digital signature attached to the request for request for changing registration has been prepared by the private key which makes a pair with the public key certificate registered to the database and receiving the approval of the other party.

Abstract: An optical disk apparatus which subsidiarily moves a feed at kick seek, thereby performing a tracking control is constituted to calculate a reference feed shifting amount and a compensation amount of the feed shifting on the basis of a lens offset just before starting of the kick seek and the number of tracks on an optical disk by which the lens is moved by the kick seek, further add/subtract the compensation amount to/from the reference feed shifting amount on the basis of the direction of the kick seek, thereby calculating a feed shifting amount, and subsidiarily move the feed by the feed shifting amount in concurrence with the kick seek. Thereby, tracking after the kick seek can be performed stably.

Abstract: The present invention provides a method for manufacturing a rigid internal gear for a wave gear device comprising an internally toothed portion and a gear main body portion comprised of different materials. In this method, a gear main body ring for forming a gear main body portion is preformed using a first aluminum alloy powder; an internal teeth-forming ring is preformed using a second aluminum alloy powder that has lower processability, is less durable, has higher abrasion resistance, and is harder than the first aluminum alloy powder; the internal teeth-forming ring is fitted inside the gear main body ring and the assembly is integrated by powder forging; and the resulting ring-shaped forging is subjected to post-processing, including cutting teeth. The gear main body portion and internally toothed portion are securely integrated by powder forging, and a lightweight rigid internal gear with high durability can therefore be obtained.

Abstract: An outer ring of a cross roller bearing is a composite component having an outer ring main body portion comprised of a lightweight metal alloy and a raceway surface formation portion that is linked to an inner side thereof and that is comprised of a ferrous material, and is manufactured in the following manner. A ring for forming the raceway surface formation portion is preformed, the ring is inserted into a forging die, powder forging is performed using a metal powder for manufacturing the outer ring main body portion, a composite component is manufactured in which a ring-shaped portion for forming the outer ring main body portion is integrally formed with the raceway surface formation ring, and an after-treatment is performed on the product. A lightweight, highly durable bearing ring can be manufactured by this method.

Abstract: In an optical disk drive, in order to cancel a lens offset which may occur when performing a seek followed by a read, a seek position must be set several sectors before a target position for the read, resulting in a delay in access time. A lens offset amount is measured when a seek followed by read is started, and how many sectors before a read target position a seek position must be set is determined on the basis of two parameters, namely, the lens offset amount and a number of seek tracks. Thereby, an optimum seek position at which the lens offset is canceled can be set with no waste, resulting in an improvement in access time.

Abstract: A user registration processor unit registers the user registration information to the database, which includes the public key certification acquired from the certification authority that has jurisdiction over each party by the request from the transaction party including seller, buyer, and transportation company. A transfer registration processor unit changes the access right holder and the cargo owner of the shipment information registered to the database at the start of transaction in compliance with the request for request for changing registration of the party with the digital signature and public key certification attached. A verification processor unit achieves the transfer registration with legal binding power by verifying that the digital signature attached to the request for request for changing registration has been prepared by the private key which makes a pair with the public key certificate registered to the database and receiving the approval of the other party.

Abstract: The present invention relates to a witness system that takes advantage of EDI (electronic data exchange) to perform efficient distribution and account settlement (accounting) processes between selling and buying companies. The present invention also provides a system ensuring information safety and offers account settlement (accounting) processes utilizing said witness system. A buying company's computer 5 makes documents according, illustratively, to delivery vouchers or order vouchers, and sends said documents to a selling company's computer 6 via a notarization authority 7. The selling company compares authentication documents so transmitted with, illustratively, delivery vouchers or order vouchers that the selling company itself has issued, and, after checking for substantive errors and determining that the contents of said documents are correct, executes a confirmation response with respect to the notarization authority.

Abstract: An optical disk apparatus which subsidiarily moves a feed at kick seek, thereby performing a tracking control is constituted to calculate a reference feed shifting amount and a compensation amount of the feed shifting on the basis of a lens offset just before starting of the kick seek and the number of tracks on an optical disk by which the lens is moved by the kick seek, further add/subtract the compensation amount to/from the reference feed shifting amount on the basis of the direction of the kick seek, thereby calculating a feed shifting amount, and subsidiarily move the feed by the feed shifting amount in concurrence with the kick seek. Thereby, tracking after the kick seek can be performed stably.