Abstract: A communication system includes: distributed control devices that use a first wireless communication to form network cells and to control communication devices coupled to the network cells based on multi-hop communication; relay devices coupled to a network cell that use the first wireless communication to transfer data between the distributed control devices; and a central control device that manages communication paths for transferring the data among the distributed control devices located in the communication path.

Abstract: A communication system includes multiple first communication devices and second and third communication devices. Each first communication device performs first wireless communication using a directive radio wave using first and second function modules; performs second wireless communication wider in communication range than the first wireless communication using a third function module; and generates different network cells. The second communication device performs the first wireless communication with the first function module and connects to one of the network cells. The third communication device manages a multi-hop communication path using the second wireless communication.

Abstract: A communication system includes: a plurality of distributed control devices, each of which is configured to utilize a first wireless communication for forming a network cell and controlling at least one communication device coupled to the network cell to transfer data via the first wireless communication, based on a communication path of multi-hop communication; at least one relay device coupled to a network cell formed by one of the plurality of distributed control devices and configured to utilize the first wireless communication for transferring the data from the one of the plurality of distributed control devices to another one of the plurality of distributed control devices; and a central control device configured to utilize a second wireless communication for managing the communication path and controlling the plurality of distributed control devices located in the communication path to transfer the data, based on the communication path.

Abstract: A communication system includes multiple first communication devices and second and third communication devices. Each first communication device performs first wireless communication using a directive radio wave using first and second function modules; performs second wireless communication wider in communication range than the first wireless communication using a third function module; and generates different network cells. The second communication device performs the first wireless communication with the first function module and connects to one of the network cells. The third communication device manages a multi-hop communication path using the second wireless communication.

Abstract: A communication system includes a plurality of first communication devices to form different network cells through first wireless communication, and a second communication device to communicate with the first communication devices through the first wireless communication. The second communication device includes: a first memory to store connection information for establishing a connection with the plurality of first communication devices through the first wireless communication; a communication circuit to connect, when data is received from one first communication device among the plurality of first communication devices, the second communication device with other first communication device different from the one first communication device through the first wireless communication using the connection information; and circuitry to transfer the data received from the one first communication device by the second communication device to the other first communication device.

Abstract: When a pile installation jig (41) is driven deeper by the length of grooves (15a), (15b) in a pile main body (12), abutment edges (42a) of notches (42) in arms (41d), (41e) push a plate-like member (13) and cause displacement of the plate-like member (13) along the grooves (15a), (15b). Thereby, the plate-like member (13) is held at portions in the grooves (15a), (15b) where the grooves (15a), (15b) extend in a direction transverse to a longitudinal direction of the pile main body (12).

Abstract: A communication apparatus includes a transmission unit that transfers connectivity information indicating that communication can be established, a storage unit that stores connection information for establishing communication with a previous communication destination acquired from the previous communication destination, an acceptance unit that accepts an instruction to establish communication with a communication destination whose connection information is stored in the storage unit while the transmission unit is transferring the connectivity information, and a first request unit that requests the communication destination to establish communication using the connection information stored in the storage unit for the communication destination in accordance with the instruction received by the receiving unit.

Abstract: An image forming apparatus includes an input unit that inputs print conditions; a search unit that searches for image forming apparatuses that can execute the print conditions; a display unit that displays icons of the found image forming apparatuses; a generating unit that generates a print job when an icon corresponding to one of the image forming apparatuses is operated; a sending unit that sends the print job to the one of the image forming apparatuses; and a management unit configured to manage progress situation information of print jobs. When an icon of a second image forming apparatus is operated after a print job is sent to a first image forming apparatus and before the first image forming apparatus completes the print job, print jobs are regenerated to distribute a remaining number of sheets between the first image forming apparatus and the second image forming apparatus.

Abstract: A disclosed network apparatus is capable of being connected to one of a restricted area where a communication is restricted and a non-restricted area where a communication is not restricted via a DHCP server and a network based on a DHCP address assigned by the DHCP server. The network apparatus includes a communication unit configured to carry out communications including a broadcast communication and a multicast communication, and a reporting unit configured to generate a report containing apparatus own information of the network apparatus to be sent over the network. In network apparatus, when the network apparatus is connected to the non-restricted area based on the DHCP address, the communication unit sends the report containing the apparatus own information of the network apparatus via the broadcast communication in place of the multicast communication.

Abstract: An image forming apparatus is disclosed including a search request transmission unit transmitting a search request to a predetermined resource in a network, a response receiving unit receiving response information in response to the search request, and storing the received response information in a storage unit, a list screen display control unit displaying a list screen including a display element corresponding to each response information stored in the storage unit within a first predetermined time period. When the list screen is changed to another screen and then changed back again to the list screen, the list screen display control unit displays the list screen including the display element corresponding to response information stored in the storage unit after the first predetermined time period has passed.

Abstract: An image forming apparatus includes an input unit that inputs print conditions; a search unit that searches for image forming apparatuses that can execute the print conditions; a display unit that displays icons of the found image forming apparatuses; a generating unit that generates a print job when an icon corresponding to one of the image forming apparatuses is operated; a sending unit that sends the print job to the one of the image forming apparatuses; and a management unit configured to manage progress situation information of print jobs. When an icon of a second image forming apparatus is operated after a print job is sent to a first image forming apparatus and before the first image forming apparatus completes the print job, print jobs are regenerated to distribute a remaining number of sheets between the first image forming apparatus and the second image forming apparatus.

Abstract: A disclosed network apparatus is capable of being connected to one of a restricted area where a communication is restricted and a non-restricted area where a communication is not restricted via a DHCP server and a network based on a DHCP address assigned by the DHCP server. The network apparatus includes a communication unit configured to carry out communications including a broadcast communication and a multicast communication, and a reporting unit configured to generate a report containing apparatus own information of the network apparatus to be sent over the network. In network apparatus, when the network apparatus is connected to the non-restricted area based on the DHCP address, the communication unit sends the report containing the apparatus own information of the network apparatus via the broadcast communication in place of the multicast communication.

Abstract: Multiple photoconductive drums on which images with different color components are formed respectively are rotated using individual motors, multiple adjustment images are formed at a predetermined interval along the cycle length of one rotation of each photoconductive drum, the reference phases for the rotation of the respective photoconductive drums are determined based on the maximum portions of the divergences between the predetermined interval and the detection interval of each adjustment image, and the individual motors are controlled so that the respective reference phases determined are aligned. The image forming region corresponding to the cycle length of one rotation of the photoconductive drum is divided into four or more even-numbered regions, the divergence amount of each region is calculated, and the maximum portions of the divergences are determined based on the difference between the divergence amounts of the divided regions being away from each other by a half cycle length.

Abstract: An image forming apparatus is disclosed including a search request transmission unit transmitting a search request to a predetermined resource in a network, a response receiving unit receiving response information in response to the search request, and storing the received response information in a storage unit, a list screen display control unit displaying a list screen including a display element corresponding to each response information stored in the storage unit within a first predetermined time period. When the list screen is changed to another screen and then changed back again to the list screen, the list screen display control unit displays the list screen including the display element corresponding to response information stored in the storage unit after the first predetermined time period has passed.

Abstract: A color registration method in a color image forming apparatus including a plurality of drum-type photoconductors for driving some or all of the photoconductors having the same diameter to match pitch fluctuations which correspond to a rotational cycle of the photoconductors, the method including: a first measurement step for forming a first registration image for each color and measuring formation positions of a plurality of predetermined portions in each registration image; a second measurement step for forming a second registration image for each color and measuring formation positions of a plurality of predetermined portions in each registration image; a calculation step for calculating a periodic fluctuation component being contained in the images in different colors and corresponding to the rotational cycle of the photoconductors so as to obtain phases thereof; and a step for adjusting a rotational phase of the photoconductors in order for the obtained phases matching to each other, wherein the interval

Abstract: Rack gears of far-side paper guides are provided such that manners of meshing with pinion gears are made tighter at respective regions corresponding to locations for constraining paper of standard size, as compared to other regions. In addition, by constituting width guide plates which are upstream in a paper feed directions from far-side paper guides and width guide plates which are downstream in a paper feed directions therefrom such that respective areas of surfaces receiving paper, and respective distances from respective width guide plates to gear mesh locations, are respectively set so as to be substantially mutually equal. Impacts from stacks of paper produced during placement of paper within a paper supply apparatus may be received substantially equal at upstream and downstream from gear mesh of far-side paper guides, and torques acting on far-side paper guides upstream and downstream from gear mesh locations may be made substantially mutually equal.

Abstract: An image forming apparatus includes an image forming unit that forms a color image in which a plurality of color component images are superimposed; and a formation controlling unit that allows the image forming unit to form images for adjustment of formation positions of the respective color component images. The formation controlling unit allows the image forming unit to form, for each color, a plurality of adjustment images having different tilts with respect to a main scanning direction. A shift of a detected position of each adjustment image from a reference position in which each adjustment image should be formed is calculated, a tilt and an intercept of a regression line that uses the reference positions and the calculated shifts as variables are calculated, and a shift in the main scanning direction and a shift in a sub-scanning direction are determined based on the calculated tilt and intercept.

Abstract: An image device includes a movable member, a guide shaft, and a shaft bearing. The movable member moves back and forth inside the device along a guide shaft when reading or recording image information. The guide shaft includes an arc portion in at least part of a cross-section. The shaft bearing is penetrated by the guide shaft at two locations in the movement direction that differ from the center of gravity in the movable member. The shaft bearing includes two inclined faces contacted by the arc portion of the guide shaft in the cross-section. The respective two inclined faces of the shaft bearing are at an angle ?f (rad) and an angle ?r (rad) with the perpendicular direction. The angle ?f (rad) and the angle ?r (rad) satisfy the following inequality: cos {?/2?(?f+?r)}>0.

Abstract: An image formation apparatus with a plurality of laser diodes that form color-component images, which correspond to a plurality of color components, onto a plurality of corresponding photosensitive drums respectively, and a transfer belt onto which the color-component images that are formed on the respective photosensitive drums are transferred. The image formation apparatus adjusts the image formation timing based on the positions of the color-component images that are transferred to the transfer belt; and when adjusting the image formation timing, the respective laser diodes form color-component images at formation intervals that correspond to an integral multiple of the period of a periodic noise.

Abstract: A color image forming apparatus including: a plurality of drum-type photoconductors for forming an image in a different color on each peripheral surface and the photoconductors having at least two different diameters; a plurality of driving sections for driving each photoconductor at a driving speed in accordance with the diameter so that each photoconductor rotates at a predetermined peripheral speed; a correction signal output section for outputting a speed correction signal to correct a periodic pitch fluctuation included in each formed image; and a drive control section for controlling the driving section to correct the driving speed of each photoconductor by the speed correction signal, wherein the speed correction signal is a signal having the same cycle as a rotational cycle of each photoconductor.