Abstract: A porous compact impregnated with lubricant fits into a lengthwise hole in the carriage to apply the lubricant around balls rolling through a return passage to realize maintenance-free for lubrication. The carriage has a flat upper portion which has threaded holes lying midway between the widthwise opposed bulges to fasten counterparts to the carriage. The carriage has widthwise opposed corners where the flat upper portion merges the respective bulges. The corners each have therein a lengthwise hole in which the cylindrical porous compact impregnated with lubricant is inserted to extend across the overall length of corners. The bulges of the carriage have threaded holes which are used to fasten the end caps to the fore and aft ends of the carriage.

Abstract: A sleeve fits in a through-hole in a carriage to provide a return passage which makes sure of both the flexibility and the stiffness of the sleeve. The sleeve is constituted with fore and aft circular ends, a pair of columns and a pair of flexible columns lying lengthwise between the fore and aft circular ends to guide the roller, lengthwise slits lying between the flexible columns and the columns, and complementary ends made on the terminals of the fore and aft circular ends. The flexible columns have raised lands having curved outer surfaces, and recessions flanked by the raised lands and having rolling wall surfaces or the return passage. The raised lands and the recessions are arranged alternately in the lengthwise direction of the sleeve to give the sleeve the capability of elastic deformation.

Abstract: An effective contact length in race surfaces formed on grooved races cut in an outer ring and an inner ring is made as greater as permitted to improve the load-carrying capacity, and correspondingly guide parts born against axially opposite ends of a roller are made as less as possible in width to reduce frictional contact resistance applied to the axially opposite ends of the roller, thereby preventing a skew of the roller. An inside circular surface on the outer ring is staggered or different in level on opposite sides of a outside grooved race to make greater the race surface than an effective contact length of circular rolling surfaces of the rollers and correspondingly less the guide part in width than the race surface.

Abstract: A sleeve fits in a through-hole in a carriage to provide a return passage which makes sure of both the flexibility and the stiffness of the sleeve. The sleeve is constituted with fore and aft circular ends, a pair of columns and a pair of flexible columns lying lengthwise between the fore and aft circular ends to guide the roller, lengthwise slits lying between the flexible columns and the columns, and complementary ends made on the terminals of the fore and aft circular ends. The flexible columns have raised lands having curved outer surfaces, and recessions flanked by the raised lands and having rolling wall surfaces or the return passage. The raised lands and the recessions are arranged alternately in the lengthwise direction of the sleeve to give the sleeve the capability of elastic deformation.

Abstract: From an observed packet, the hop number, which is the number of nodes that the packet has passed through, and a bottleneck bandwidth, which is a bottleneck for transmitting the packet, are determined so as to detect loss failures. Thereby, the subnet that transmitted the observed packet is located as a node in a topology tree on the basis of the determined hop count and bottleneck bandwidth. When a loss failure, by which the packet is lost, is detected, subnets that are inappropriately arranged are extracted from the arrangement in the topology tree of the loss-failure-detected subnet, and the arrangement of the extracted subnets is modified in order to resolve the inappropriateness.

Abstract: A porous compact impregnated with lubricant fits into an end cap in a fashion exposed in part to a turnaround passage to apply the lubricant around balls while the balls roll through the turnaround passage. The porous compact is placed in a concavity in an end cap major part and a slot rounded at opposite ends thereof is formed in an outside curved portion of the turnaround passage to communicate the concavity with the turnaround passage. An applicator nose of the porous compact is exposed to the turnaround passage through the slot. The balls while being guided along edges of the slot come into rolling-contact with the exposed surface of the porous compact to be coated with the lubricant.

Abstract: An apparatus stores, in association with each of one or more services to be provided, a communication monitoring rule under which communication performed for providing the each of the one or more services is to be monitored. The apparatus communicates with another apparatus that is operable to run a virtual machine and run a virtual router relaying communication performed by the virtual machine. When a service to be provided by the virtual machine is selected from among the one or more services, the apparatus controls the virtual router to monitor communication performed by the virtual machine according to the communication monitoring rule associated with the selected service, by sending the communication monitoring rule to the virtual router.

Abstract: The turning bearing has a separator whose leading and trailing sides are concaved to fit over circular rolling surfaces of the rollers to provide concavities where concaved surfaces lying either in parallel with and in perpendicular to the axis of the roller. The rollers fit in the separator in either of two different directions. The separator can be easier installed into the raceway through a loading hole without the posture of the separator in mind. The separator has a quadrilateral in a transverse cross-section perpendicular to a traveling direction of the separator of which a peripheral surface is in opposition to the outer ring and the inner ring. The separator has a center through-hole. The concaved surfaces in the separator are contoured in arced or curved profiles and bulge gradually closer to a circular edge of the through-hole to form arcing bulges at bottoms of the curved surfaces.

Abstract: Transfer destination of a packet originating from a virtual machine is controlled so as to allow a capture device arranged in a communication network to capture a packet that is transferred using a communication tunnel. A first server acquires a first packet originating from a source virtual machine being operated by the first server, encapsulates the first packet by adding source and destination addresses. The first server further adds a transfer-destination address to the encapsulated first packet to generate a second packet when the first packet is determined to be a target packet to be captured by the capture device. Then, the first server transmits the second packet including the transfer-destination address to the second server using the communication tunnel while the second packet including the first packet is transferred to the transfer-destination address.

Abstract: Measurement agents in a network failure detecting system each configure a group together with other measurement agents that receive a service from the same provision server, and form a link to create a tree structure with a predetermined measurement agent in the group at its top. The measurement agent then receives measurement results from the other measurement agents in the group, and narrows down candidates of a failure location based on the received measurement results. The measurement agent transmits the narrowed candidates of the failure location to a surveillance server or one of the other measurement agents. The surveillance server then receives the transmitted candidates of the failure location, and specifies the failure location based on the received candidates of the failure location.

Abstract: A data conversion device includes a receiving unit that receives first data and second data, transmitting after a start of the first data, transmitted from the first device to the second device, a transmitting unit that transmits the received first data and second data to a third device, and a control unit that controls a time point of transmitting the second data from the transmitting unit to lengthen a time interval between transmission of the first data and second data from the transmitting unit than a first time interval between transmission of the first data from the transmitting unit and reception of response data to the first data by the receiving unit when the first time interval is longer than a time interval between the transmission of the first data and second data from the first device to the second device.

Abstract: A loading hole made in either of an outer ring and an inner ring is provided in two rows of raceways defined between the outer ring and the inner ring, one to each raceway. The loading hole is set out of the guide surface and, therefore there is no fear that a closure fitted in the loading hole causes any obstacle to the rolling movement of the rollers. The loading hole extends radially of the bearing at a location that a center line of the loading hole lies set-off or biased from a center of the roller. An opening edge of the loading hole is exposed to the raceway in a location out of the guide surface, so that the rollers are allowed to roll smoothly without touching with the innermost edge of the closure.

Abstract: An abnormality locating apparatus locates an abnormal location in a network. An abnormal location judging part judges a normality or abnormality of a link based on a normality or abnormality of an observation flow, by acquiring information of links through which each observation flow passes, from a network route information storage that stores passing route information of observation flows passing through the links. A diagnosis accuracy judging part judges that an accuracy of judging the normality or abnormality of a connecting link connected to a first node deteriorates, by acquiring links connected to each relay node as connecting links from a relay node connecting link information storage that stores connecting link information of each relay node, and judging that a relay node having all connecting links thereof that are abnormal is the first node having all observation flows passing therethrough that are abnormal.

Abstract: A CPU executes a process including determining a core node among plural relay nodes on a basis of route information, acquiring a first and a second packets flowing between a server and a terminal apparatus, the second packet being transmitted on a basis of the first packet, calculating a first delay time on a basis of the first and the second packets, the first delay time relating to packet transmission between the server and the terminal apparatus, transmitting a third packet to the core node, receiving a response to the third packet from the core node, calculating a second delay time on a basis of the third packet and the response, the second delay time being a delay time of the core node, and calculating a third delay time being a delay time of an end node on a basis of the first and the second delay times.

Abstract: A storage unit stores a correspondence between information indicating one or more services executable on one or more virtual machines and information indicating one or more users who use the services, and one or more communication monitoring rules to be used by one or more virtual routers. The rules are defined for each of the services. A control unit specifies, when a rule stored in the storing unit is changed, one or more of the users who use a service corresponding to the changed rule by referring to the storing unit. The control unit transmits the changed rule to one or more of the virtual routers which relay communication of one or more of the virtual machines assigned to the specified users so as to cause the one or more of the virtual routers, to which the changed rule is transmitted, to perform monitoring based on the changed rule.

Abstract: An apparatus stores, in association with each of one or more services to be provided, a communication monitoring rule under which communication performed for providing the each of the one or more services is to be monitored. The apparatus communicates with another apparatus that is operable to run a virtual machine and run a virtual router relaying communication performed by the virtual machine. When a service to be provided by the virtual machine is selected from among the one or more services, the apparatus controls the virtual router to monitor communication performed by the virtual machine according to the communication monitoring rule associated with the selected service, by sending the communication monitoring rule to the virtual router.

Abstract: A connection state estimating method includes: acquiring a network distance between respective devices in a communication network; assuming branch point candidates at which three devices extracted from the network are connected together; calculating the network distance between each of the assumed branch point candidates and each of the three devices; classifying all the branch point candidates assumed to be connected with one of the devices into groups on the basis of the network distance between the one device and each branch point candidate; calculating representative values of the network distances between each device and branch point candidates assumed to be connected with the device; and selecting a device from the devices assumed to be connected with one of the branch point candidates and the representative value relating to the selected device.

Abstract: A packet reception portion receives packets of user traffic transferred on the network. The received packets are transferred to an address extraction portion via a distribution portion, and the transmission source address and destination address are extracted. Based on these addresses, a packet generation portion generates probe packets the transfer destination of which is the address destination. A packet transmission portion transmits the probe packets to the network. The transmitted probe packets are received as probe response packets by the packet reception portion. The probe response packets received by the packet reception portion are transferred to a result storage portion via the distribution portion. The result storage portion stores transmission source addresses included in the probe packets in a result storage DB.

Abstract: Transfer destination of a packet originating from a virtual machine is controlled so as to allow a capture device arranged in a communication network to capture a packet that is transferred using a communication tunnel. A first server acquires a first packet originating from a source virtual machine being operated by the first server, encapsulates the first packet by adding source and destination addresses. The first server further adds a transfer-destination address to the encapsulated first packet to generate a second packet when the first packet is determined to be a target packet to be captured by the capture device. Then, the first server transmits the second packet including the transfer-destination address to the second server using the communication tunnel while the second packet including the first packet is transferred to the transfer-destination address.

Abstract: A data conversion device includes a receiving unit that receives first data and second data, transmitting after a start of the first data, transmitted from the first device to the second device, a transmitting unit that transmits the received first data and second data to a third device, and a control unit that controls a time point of transmitting the second data from the transmitting unit to lengthen a time interval between transmission of the first data and second data from the transmitting unit than a first time interval between transmission of the first data from the transmitting unit and reception of response data to the first data by the receiving unit when the first time interval is longer than a time interval between the transmission of the first data and second data from the first device to the second device.