Abstract: The present invention relates to a catalyst system for olefin oligomerization and a method for olefin oligomerization, and more specifically, a catalyst system for olefin oligomerization and a method for olefin oligomerization that have more improved supporting efficiency due to a ligand compound capable of functioning as a tether to a support, and thus, exhibit high activity in the olefin oligomerization even with smaller amounts of catalyst composition and cocatalyst, thus enabling more efficient preparation of alpha-olefins.

Abstract: The present invention relates to a novel transition metal compound, a catalyst composition comprising the transition metal compound, and a method of preparing polyolefin using the catalyst composition.

Abstract: An image forming apparatus includes an engine unit to perform an image forming job; an engine control unit to control the operation of the engine unit; a brushless direct current (BLDC) motor to drive the engine unit; a sensor unit to sense electric angle information and driving velocity information of the BLDC motor; a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit; a driving signal unit to generate a driving signal to control the BLDC motor; and a digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.

Abstract: A method of multi user multiple input multiple output (MU-MIMO) communication in a wireless local area network (WLAN) system, and a transmitting device therefore, are discussed. The method according to an embodiment includes generating an Aggregate-Medium Access Control Protocol Data Unit (A-MPDU) including an A-MPDU subframe which includes a Medium Access Control Protocol Data Unit (MPDU) delimiter field and an MPDU; and generating a Physical Layer Protocol Data Unit (PPDU) including the A-MPDU by using a guard interval. The guard interval is selected by the transmitting device among a short guard interval and a long guard interval. The guard interval used for the PPDU is selected to be the short guard interval when the PPDU is generated for a plurality of receiving devices, all of which support the short guard interval. The method according to the embodiment further includes transmitting the PPDU to the plurality of receiving devices.

Abstract: Semiconductor devices including a dummy gate structure on a fin are provided. A semiconductor device includes a fin protruding from a substrate. The semiconductor device includes a source/drain region in the fin, and a recess region of the fin that is between first and second portions of the source/drain region. Moreover, the semiconductor device includes a dummy gate structure overlapping the recess region, and a spacer that is on the fin and adjacent a sidewall of the dummy gate structure.

Abstract: A fan-out semiconductor package includes: a first interconnection member having a through-hole; a processor chip disposed in the through-hole; a memory chip disposed in the through-hole and including a plurality of dies stacked on each other; an encapsulant encapsulating at least portions of the first interconnection member, the memory chip, and the processor chip; and a second interconnection member disposed on the first interconnection member, an active surface of the memory chip, and an active surface of the processor chip. The first interconnection member and the second interconnection member respectively include redistribution layers electrically connected to connection pads of the processor chip and connection pads of the memory chip, and the connection pads of the processor chip and the connection pads of the memory chip are electrically connected to each other by the redistribution layer of the second interconnection member.

Abstract: According to one embodiment, a method for a wireless local area includes: generating a medium access control (MAC) protocol data unit (MPDU) to be transmitted to a target station; generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) by attaching a PLCP preamble to the MPDU; selecting a transmission channel; and transmitting the PPDU to the target station over the transmission channel. Selecting the transmission channel includes: performing clear channel assessment (CCA) on a first channel to determine whether the first channel is idle; and only after it is determined that the first channel is idle, selecting the first channel and at least one idle second channel as the transmission channel. The PLCP preamble includes channel allocation information indicating a bandwidth of the transmission channel.

Abstract: A display device includes a scan line extending primarily in a first direction, disposed on a substrate, and transmitting a scan signal, a data line extending primarily in a second direction intersecting the first direction and transmitting a data signal, a driving voltage line extending primarily in the second direction and transmitting a driving voltage, a plurality of transistors including first and second transistors, wherein the second transistor is connected to the scan line and the data line, and the first transistor is connected to the second transistor, a light emitting element connected to the plurality of transistors, and a storage capacitor disposed between the substrate and an active pattern of the first transistor, the storage capacitor including a first electrode disposed on the substrate and a second electrode at least partially overlapping the first electrode. A first insulating layer is disposed between the first and second electrodes.

Abstract: Provided are a catalyst system for olefin oligomerization reaction and a method for olefin oligomerization, and more particularly, a catalyst system for olefin oligomerization reaction and a method for olefin oligomerization, which enable more efficient preparation of alpha-olefin, because a catalytic active ingredient is supported on a support, thereby exhibiting high activity in olefin oligomerization reaction even by using smaller amounts of a catalyst composition and a cocatalyst.

Abstract: A powder plasma processing apparatus is disclosed. The powder plasma processing apparatus includes: a chamber configured to perform plasma processing on a powder; a powder supply unit disposed in an upper portion of the chamber; and a plurality of plate-like surface discharge plasma modules disposed below the powder supply unit and positioned within the chamber, wherein surfaces of the surface discharge plasma modules are spaced apart from each other. According to the powder plasma processing apparatus, the powder can be uniformly processed, and the time that the powder spends in contact with the plasma can be controlled, thereby allowing efficient powder processing to be performed.

Abstract: The present invention relates to a ligand compound, catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention exhibit selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

Abstract: Provided is a wideband electromagnetic wave (EMW) absorber including a magnetic composite having a structure in which magnetic particles are dispersed in a polymer resin, and a plurality of conductive lines arranged in the magnetic composite, and a method of manufacturing the same. The wideband EMW absorber can be used for a device configured to emit EMWs and effectively absorb wideband EMWs.

Abstract: The present invention relates to a hybrid supported metallocene catalyst. More specifically, the present invention relates to a hybrid supported metallocene catalyst using two or more different types or more of metallocene compounds, among which one type of the metallocene compounds shows a high polymerization activity even when it is supported, and thus the catalyst has an excellent activity and can be utilized in the polymerization of olefinic polymers having ultra-high molecular weight. Based on the hybrid supported metallocene catalyst of the present invention, an olefinic polymer having high molecular weight and the desired physical property can be prepared.

Abstract: The present disclosure relates a modular multi-level converter (MMC) including two arms including different types of sub modules according to the respective arms, two sub controllers corresponding to the two arms, respectively and configured to separately control the two arms, respectively, and a central controller configured to determine a switching operation condition of the sub module and to output a switching signal corresponding to the switching operation condition to each of the two sub controllers, wherein the two sub controllers control the respective corresponding arms based on the switching signal and, upon receiving a voltage change switching signal for controlling a voltage applied to one of the two arms, change the voltage applied to one of the two arms based on the voltage change switching signal.

Abstract: Provided are an ultra-low-field nuclear magnetic resonance device and an ultra-low-field nuclear magnetic resonance measuring method. The method includes applying a first measurement bias magnetic field corresponding to an excitation frequency of a coherent biomagnetic field generated in association with the electrophysiological activity of human body organs, applying a second measurement bias magnetic field having the same direction as the first measurement bias magnetic field and having a different magnitude than the first measurement bias magnetic field, and measuring a magnetic resonance signal generated in the human body by using magnetic field measuring means.

Abstract: A fan-out semiconductor package includes: a first interconnection member having a through-hole; a processor chip disposed in the through-hole; a memory chip disposed in the through-hole and including a plurality of dies stacked on each other; an encapsulant encapsulating at least portions of the first interconnection member, the memory chip, and the processor chip; and a second interconnection member disposed on the first interconnection member, an active surface of the memory chip, and an active surface of the processor chip. The first interconnection member and the second interconnection member respectively include redistribution layers electrically connected to connection pads of the processor chip and connection pads of the memory chip, and the connection pads of the processor chip and the connection pads of the memory chip are electrically connected to each other by the redistribution layer of the second interconnection member.

Abstract: Provided are a hybrid supported catalyst system and a method of preparing a polyolefin using the same. The hybrid supported catalyst system according to the present invention may be used to perform oligomerization and copolymerization of olefin monomers in a single reactor at the same time with high efficiency without a separate process of preparing alpha-olefin. Therefore, costs for preparing or purchasing comonomers which are expensive raw materials may be reduced, thereby reducing the production cost of a final product.

Abstract: An optical inspection apparatus includes an inspection target unit on which an inspection target is loaded, an illumination optical unit configured to irradiate incident light to the inspection target, an objective lens unit disposed between the illumination optical unit and the inspection target unit, a detection optical unit configured to receive reflective light reflected from the inspection target to thereby detect a presence or absence of a defect on the inspection target, and a control unit configured to control the illumination optical unit and the detection optical unit. The illumination optical unit includes a light source part configured to irradiate the incident light, and a spatial filter array configured to modify a transmission region of the incident light irradiated from the light source part. The spatial filter array includes a spatial filter part, and a filter movement part configured to move the spatial filter part.

Abstract: An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, and a plurality of transmitting windows configured to transmit light therethrough. The plurality of transmitting windows is spaced apart from the plurality of pixels. Each of the plurality of pixels includes a transistor and a capacitor. The transistor includes a light-blocking electrode disposed on the substrate and a plurality of electrode members disposed at different layers on the light-blocking electrode. The capacitor includes a first capacitor electrode disposed on a same layer as the light-blocking electrode, and a second capacitor electrode disposed on a same layer as a first one of the plurality of electrode members to overlap the first capacitor electrode.