Abstract: An image forming apparatus capable of minimizing color mis-registration due to runout of gears is disclosed. The image forming apparatus includes a plurality of photosensitive bodies having transfer points to transfer images onto a transfer object, a driving source to drive at least two photosensitive bodies of the plurality of photosensitive bodies, and a driving gear train to transmit driving power from the driving source to the at least two photosensitive bodies. The driving gear train includes photosensitive body shaft gears respectively connected to the photosensitive bodies driven by the driving source, and connecting gears to transmit the driving power to the photosensitive body shaft gears.

Abstract: A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP.

Abstract: A signal detection apparatus and method in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. The apparatus includes a receiver for receiving training symbol vectors and a data signal vector from a transmitting end through a plurality of receive (Rx) antennas and a detector for expanding the training symbol vectors into second- or higher-order polynomials, for generating a weighting parameter vector for multivariate polynomial expansion of the data signal vector by using the polynomials expanded from the training symbol vectors and thereafter for expanding the data signal vector into a second- or higher-order multivariate polynomial using the weighting parameter vector, and for detecting Transmit (Tx) values of the data signal vector from the multivariate polynomial. Therefore, signal detection performance in a Multiple Input Multiple Output (MIMO) wireless communication system resembles that of a non-linear scheme while complexity resembles that of a linear scheme.

Abstract: A connection structure of plate type vertical drains and a circular horizontal drainpipe and a method of constructing a horizontal drain layer in soft ground using the same. The plate type vertical drains are coupled to the circular horizontal drainpipe using cylindrical fitters, so that excess pore water can be easily drained from underground even if the horizontal drain layer is constructed by pouring soil instead of sand, thereby reducing construction costs and a construction period.

Abstract: A servo control apparatus in an optical disc device and a method of controlling a servo are provided. When an image is printed on a surface of an optical disc, an irregular reflective surface results.

Abstract: A self sensing reference system and method are described. The self sensing reference systems and methods facilitate efficient accurate access to information. In one embodiment, a self sensing reference system includes a main cascode component, a self referencing component, and a comparison verification component. The main cascode component receives input on a first current value and a second current value. The self referencing component establishes a plurality of data indications wherein a first data indication is established based upon a comparison of the first current value to the second current value. A comparison verification component verifies a second data indication.

Abstract: A test system and a failure parsing method. The test system may comprise a cell array including defective cells formed according to various failure causes, a test apparatus configured to measure electric characteristics from the defective cells and make the measured electric characteristics numerical, and a database apparatus configured to store the numerical electric characteristics. The failure parsing method may include forming defective cells to have at least one failure cause, measuring electric characteristics of each of the defective cells, storing the measured electric characteristics of each of the defective cells in a database, and judging failure causes of a failed chip of a semiconductor wafer based on the database.

Abstract: A cyclone vacuum cleaner including a plurality of cyclone chambers arranged in a group. The cyclone chambers are configured such that frequency characteristics of noises generated from respective cyclone chambers are different from each other.

Abstract: A power transmission device and an image forming apparatus having the same that is capable of reliably transmitting intermittent power to a driven component from a driving source. The power transmission device includes a shaft, a first intermittent gear to receive power from the driving source and to rotate on the shaft, a second intermittent gear arranged so as to move between a first position in which the second intermittent gear is connected to the first intermittent gear along an axial direction of the shaft and a second position in which the second intermittent gear is disconnected from the first intermittent gear, a sliding unit arranged so as to slide along the shaft and to move the second intermittent gear in the axial direction of the shaft, and a driving unit to drive the sliding unit.

Abstract: Apparatuses and methods for processing a bandwidth request in a multihop relay Broadband Wireless Access (BWA) communication system are provided. A communication method of a Relay Station (RS) includes determining a number of bandwidth request ranging codes received from Subscriber Stations (SSs); and reporting the number of the bandwidth request ranging codes to a Base Station (BS). A communication method of the BS includes allocating a resource to an RS to report on a number of detected bandwidth request ranging codes; and receiving a report on the number of the bandwidth request ranging codes using the allocated resource.

Abstract: A method of determining a recording power for a recordable optical disk in an optical disk system is provided. The method is capable of minimizing the time taken to determine an optimum recording power for each recording speed and thus improve recording performance.

Abstract: An image forming apparatus includes a developing unit to form an image using a developing agent on one side of a printing medium transported along a simplex printing path, a fixing unit to fix the developing agent on the printing medium, a discharging roller to discharge the printing medium that passes the fixing unit, and a first driving source to drive the developing unit, the fixing unit and the discharging roller.

Abstract: Disclosed is a remote control system in a mobile communication terminal and method thereof enabling a user to use the mobile communication terminal not only passively but also actively. The present invention includes a first step of receiving a remote control command from a subscriber, a second step of recording the remote control command in a reserved field of the page message, a third step of transmitting the page message to the mobile communication terminal, and a fourth step of having the mobile communication terminal operate in accordance with the remote control command included in the page message.

Abstract: An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying a laser beam to a track of an optical disc and detecting reflected light, a servo unit for controlling tracking and focus of the optical pick-up unit and a monitoring unit for comparing a monitoring signal, which is output from the optical pick-up unit and the servo unit, with a reference signal and generating a blocking signal and a blocking release signal. Recording or playing of data on the optical disc is stopped in response to the blocking signal, and recording or playing of the data on the optical disc is resumed in response to the blocking release signal based on a state of the optical disc system when recording or playing was stopped.

Abstract: An ADIP (address in pre-groove) signal detection circuit is capable of correctly and quickly detecting discontinuous points in a wobble signal, and has a simple configuration in a wobble detection system of an optical disc device such as a DVD+R/RW, and an ADIP signal detection method thereof. The ADIP signal detection circuit performing the ADIP signal detection method includes one or two window comparators, two edge detection circuits each consisting of an exclusive OR circuit and an AND circuit, and two discontinuous point determination circuits each consisting of a flip-flop and a counter. Therefore, the ADIP signal detection circuit has a simple configuration so that it can be easily implemented. Also, since the ADIP signal detection circuit has a fast operation speed, the ADIP signal detection circuit detects discontinuous points correctly and quickly.

Abstract: An image forming apparatus includes plurality image carriers sequentially arranged, a conveying belt, which conveys a print medium onto which color-separated images formed on the plurality of image carriers are overlapped, and a plurality of image transfer rollers installed to respectively correspond to the plurality image carriers. The conveying belt is interposed between the image transfer rollers and the image carriers. At least one of the plurality image transfer rollers is arranged to be compressed with a pressure higher than those applied to the other image transfer rollers against the image carriers.

Abstract: Provided is an apparatus and method for determining a data transmission rate in consideration of the queue length of a Relay Station RS in a multi-hop relay system. A Base Station BS apparatus of the multi-hop relay system includes a receiver and a calculator. The receiver receives channel condition information and queue length information for a Mobile Station MS from an RS. The calculator of the BS apparatus determines a data transmission rate between the BS and the RS for data of the MS using the channel condition information and the queue length information.

Abstract: An ADIP (address in pre-groove) signal detection circuit is capable of correctly and quickly detecting discontinuous points in a wobble signal, and has a simple configuration in a wobble detection system of an optical disc device such as a DVD+R/RW, and an ADIP signal detection method thereof. The ADIP signal detection circuit performing the ADIP signal detection method includes one or two window comparators, two edge detection circuits each consisting of an exclusive OR circuit and an AND circuit, and two discontinuous point determination circuits each consisting of a flip-flop and a counter. Therefore, the ADIP signal detection circuit has a simple configuration so that it can be easily implemented. Also, since the ADIP signal detection circuit has a fast operation speed, the ADIP signal detection circuit detects discontinuous points correctly and quickly.

Abstract: The present invention generally relates to an injector/ejector (in/ejector) and shelf structure grounded to a frame ground of a card, in which electromagnetic and electric waves generated in an electric or electronic device can be conducted outside.

Abstract: Provided are an ARQ apparatus and method for a multihop system in a broadband wireless access communication system. The ARQ method of a relay includes determining if the relay successfully receives specific data from a source and transmitting the specific data to a destination; receiving feedback data from the destination and determining if the destination successfully receives the specific data; generating feedback data including data indicating if the relay and the destination successfully receive the specific data, and outputting the feedback data to the source; and retransmitting the specific data, when the relay successfully receives the specific data but the destination fails to receive the specific data. Accordingly, when the MH-BTS successfully receives the data from the source but the destination fails to receive the data, the source does not retransmit same data to the MH-BTS.