Abstract: An imaging lens system includes a first lens having a negative refractive power, a second lens having a refractive power, a third lens having a refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a convex object-side surface is convex in a paraxial region thereof and a concave image-side surface in a paraxial region thereof. The first to sixth lenses are sequentially disposed in ascending numerical order along an optical axis of the imaging lens system from an object side of the imaging lens system toward an image plane of the imaging lens system, and one or more of the first to fifth lenses is configured to be movable in a direction of the optical axis.

Abstract: An optical imaging system includes a first lens group, a second lens group, a third lens group, and a fourth lens group sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein at least one lens group among the first lens group to the fourth lens group is configured to be movable along the optical axis, the first lens group has a positive refractive power and comprises a reflective member and at least one lens disposed between the object side of the optical imaging system and the reflective member, and the at least one lens is configured to refract light passing through the at least one lens to converge the light to be incident on the reflective member.

Abstract: An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, sequentially disposed from an object side. A field of view (FOV) of the imaging lens system according to an embodiment is wider than 85 degrees and narrower than 160 degrees. In the imaging lens system according to an embodiment, a distance (TTL) from an object-side surface of the first lens to an imaging plane is greater than 6.0 mm and less than 9.0 mm.

Abstract: An apparatus and method for controlling deactivation of cylinders in an engine may include a sensor that measures pressure inside an intake manifold of the engine, an oil control valve (OCV) that deactivates the cylinders in the engine, and a controller that is configured to control the OCV to deactivate a specific cylinder in the engine, based on the pressure inside the intake manifold.

Abstract: An apparatus and method for controlling deactivation of cylinders in an engine may include a sensor that measures pressure inside an intake manifold of the engine, an oil control valve (OCV) that deactivates the cylinders in the engine, and a controller that is configured to control the OCV to deactivate a specific cylinder in the engine, based on the pressure inside the intake manifold.

Abstract: A calculation code generation circuit performs calibration using a counter, and a digital correction circuit including the same. The calculation code generation circuit performs a calculation process according to first and second modes, the calculation process including generating a first code by sampling a first value of the count code, generating a second code by sampling a second value of the count code, generating first and second calculation codes using the first and second codes in the first and second modes, respectively, and generating, in a calibration disable state, a third calculation code using the first and second calculation codes generated in the first and second modes, respectively, to remove the influence of the comparison offset or comparison performance of a comparator, thereby removing a calibration error.

Abstract: Provided are a method for cooperating between smart devices, which includes: Identifying, by a cloud server, a wireless access device accessed by the first smart device and registering the first smart device as an access group corresponding to the corresponding wireless access device; receiving, by the cloud server, event occurrence information from a second smart device; Determining, by the cloud server, a type of an event, an event occurrence time, and an event occurrence point as the event occurrence information; determining, by the cloud server, a group member associated with the event occurrence time and the event occurrence point among group members of the registered access group as a event group member; Determining, by the cloud server, required information depending on the type of the event and requesting the required information corresponding to the event occurrence time to the event group member; and acquiring and storing, by the cloud server, the required information from the event group member, an

Abstract: A field emission device may comprise: an emitter comprising a cathode electrode and an electron emission source supported by the cathode electrode; an insulating spacer around the emitter, the insulating spacer forming an opening that is a path of electrons emitted from the electron emission source; and/or a gate electrode around the opening. The electron emission source may comprise a plurality of graphene thin films vertically supported in the cathode electrode toward the opening.

Abstract: A material including: graphene; and an inorganic material having a crystal system, wherein a crystal plane of the inorganic material is oriented parallel to the (0001) plane of the graphene. The crystal plane of the inorganic material has an atomic arrangement of a hexagon, a tetragon, or a pentagon.

Abstract: According to the present invention, a method for manufacturing a compound semiconductor comprises: forming a graphene-derived material layer on either a first selected substrate or a first selected compound semiconductor layer; forming a second compound semiconductor layer of at least one layer on at least said graphene-derived material layer, and changing the graphene-derived material layer so as to separate said second compound semiconductor layer of at least one layer.

Abstract: A field emission device may comprise: an emitter comprising a cathode electrode and an electron emission source supported by the cathode electrode; an insulating spacer around the emitter, the insulating spacer forming an opening that is a path of electrons emitted from the electron emission source; and/or a gate electrode comprising a graphene sheet covering the opening. A method of manufacturing a gate electrode may comprise: forming a graphene thin film on one surface of a conductive film; forming a mask layer having an etching opening on another surface of the conductive film, wherein the etching opening exposes a portion of the conductive film; partially removing the conductive film through the etching opening to partially expose the graphene thin film; and/or removing the mask layer.

Abstract: A field emission device may comprise: an emitter comprising a cathode electrode and an electron emission source supported by the cathode electrode; an insulating spacer around the emitter, the insulating spacer forming an opening that is a path of electrons emitted from the electron emission source; and/or a gate electrode around the opening. The electron emission source may comprise a plurality of graphene thin films vertically supported in the cathode electrode toward the opening.

Abstract: The present invention relates to a method for recovering elemental silicon from silicon sludge by electrolysis in a non-aqueous electrolyte. The recovery method of silicon according to the present invention can achieve direct reduction of silicon by electrolysis at a low temperature (below 200° C.), control the structure of silicon by a simple process and a change in electrolysis conditions, and perform a continuous process by adding a silicon salt.

Abstract: A method for preparing nanotubes by providing nanorods of a piezoelectric material having an asymmetric crystal structure and by further providing hydroxide ions to the nanorods to etch inner parts of the nanorods to form the nanotubes.

Abstract: A manufacturing method of an apparatus for generating electrical energy according to an embodiment of the present invention comprises disposing a first electrode on a substrate, disposing a nanowire comprising a piezoelectric material on the first electrode, disposing a photoelectric conversion layer which is electrically connected to the nanowire on the first electrode, disposing, a second electrode on the nanowire and the photoelectric conversion layer, connecting the first electrode and the second electrode by a connection part, and disposing a storage part which is electrically connected to the connection part, wherein when an external force is applied to at least one of the first electrode and the second electrode, the nanowire is transformed to generate electrical energy.

Abstract: A high molecular nanocomposite membrane for a Direct Methanol Fuel Cell (DMFC), and a Membrane-Electrode Assembly (MEA) and a methanol fuel cell including the same membrane. The high molecular nanocomposite membrane for a DMFC includes a perflurorosulfonic acid polymer (Nation®), high molecular membrane in which hydrophobic silica nanoparticles made from a silane compound having a water repellent functional group are dispersed. Since the high molecular nanocomposite membrane for a DMFC has lower permeability of methanol than a commercially available Nation® high molecular membrane, the MEA fabricated using the high molecular nanocomposite membrane has little crossover of reaction fuel at the negative electrode. In addition, the methanol fuel electrode fabricated using the MEA that includes the high molecular nanocomposite membrane can decrease fuel loss and voltage loss.

Abstract: The present invention, which relates to an apparatus for collecting data at multi-points, suggests an apparatus connecting analog blocks obtaining the same channel data in series with each other and connecting analog blocks obtaining different channel data in parallel with each other to collect data. The suggested apparatus includes a channel data collecting group including at least two channel data collecting units having data obtaining modules collecting channel data at different points and connected in series with each other; and a channel data processing unit including the channel data collecting units connected in parallel with each other and controlling each of the data obtaining module so as to allow each of the channel obtaining module to shift the channel data by a predetermined size.

Abstract: Provided is a time-domain voltage comparator including a voltage-time converter. The voltage-time converter includes a conversion unit and an output unit. The conversion unit includes a first MOS transistor which shifts a voltage level of the first detection node according to an external first voltage signal, and a second MOS transistor which shifts a voltage level of the second detection node according to an external second voltage signal. The output unit generates first and second output signals in response to voltages of the first and second detection nodes. The output unit determines a shifted time of the first output signal according to a voltage level of the first detection node and determines a shifted time of the second output signal according to a voltage level of the second detection node.

Abstract: An apparatus for storing energy may include: a plurality of nanowire cells electrically connected to each other; and a storage for storing electrical energy generated from the nanowire cells. Each of the plurality of nanowire cells may include: first and second electrodes disposed at an interval; and a nanowire, which is disposed between the first and the second electrodes and made of a piezoelectric material. The plurality of nanowire cells may be electrically connected, so that voltage or current may be increased. Therefore, wireless recharging of the storage connected to the nanowire cells with electrical energy may be enabled.

Abstract: An apparatus for generating electrical energy may include; a first electrode, a second electrode spaced apart from the first electrode, the second electrode having a substantially planar flat plate shape, a conductor which electrically connects the first and second electrodes, and a nanowire disposed on the first electrode, the nanowire including a deformable piezoelectric material, wherein a Schottky contact is formed between the nanowire and the second electrode as the nanowires is deformed.