Abstract: A quantum dot including a semiconductor nanocrystal core and a semiconductor nanocrystal shell disposed on the core and does not include cadmium, wherein the core includes a Group III-V compound, the quantum dot has a maximum photoluminescence peak in a green light wavelength region, a full width at half maximum (FWHM) of the maximum photoluminescence peak is less than about 50 nanometers (nm), and a difference between a wavelength of the maximum photoluminescence peak and a first absorption peak wavelength of the quantum dot is less than or equal to about 25 nanometers, and a production method thereof.

Abstract: A quantum dot including a core including a quaternary alloy semiconductor nanocrystal and not including cadmium, a composition and a quantum dot polymer composite including the same, and an electronic device including the same. The quaternary alloy semiconductor nanocrystal comprises indium (In), phosphorous (P), zinc (Zn), and selenium (Se), and in the core, a ratio of the zinc with respect to the indium is less than or equal to about 0.5:1 and in the core, a ratio of selenium with respect to zinc is less than or equal to about 0.6:1.

Abstract: Provided are an electronic device and method for assisting driving of a vehicle, the electronic device including a sensor configured to sense a rotation direction of a steering wheel of the vehicle, a processor configured to monitor rotation direction switching events of the steering wheel, obtain a rotation direction switching pattern about a number of rotation direction switching events of the steering wheel per unit time, and determine whether to provide an alert to a driver of the vehicle, based on the obtained rotation direction switching pattern, and an outputter configured to output the alert to the driver, based on the determination.

Abstract: An electroluminescence display device, including a first electrode and a second electrode facing each other; a quantum dot emission layer disposed between the first electrode and the second electrode, the quantum dot emission layer including a plurality of quantum dots and not including cadmium, wherein the quantum dot emission layer includes a red emission layer disposed in a red pixel, a green emission layer disposed in a green pixel, and a blue emission layer disposed in a blue pixel, wherein the device has color reproducibility according to a DCI standard of greater than or equal to about 89%.

Abstract: A cadmium free quantum dot not including cadmium and including: a semiconductor nanocrystal core comprising indium and phosphorous, a first semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core and comprising zinc and selenium, and a second semiconductor nanocrystal shell disposed on the first semiconductor nanocrystal shell and comprising zinc and sulfur, a composition and composite including the same, and an electronic device.

Abstract: The present invention relates to a polymer-graphene composite, in which a polymer has been introduced onto the surface of graphene while maintaining the structural features and mechanical properties of the graphene, thereby realizing an excellent dispersibility in an organic solvent, a method for preparing the same, and a polymer-graphene composite composition using the same.

Abstract: Disclosed is an electronic device including a communication circuit, a microphone, a memory, speaker, and a processor, in which the processor receives the speech input and transmits first data associated with the speech input to a first server for supporting the speech recognition service, receives second data corresponding to processing of a part of the first data from the first server and outputs the second data at a first time that a first period of time has elapsed after the transmission of the first data, and outputs third data corresponding to processing of the rest of the first data at a second time that a second period of time has elapsed from the first time, while receiving the third data from the first server or a second server for supporting the speech recognition service before the second time.

Abstract: A two-wheeled vehicle which includes a two-wheeled vehicle body, a front wheel and a rear wheel respectively rotatably installed at a front and a rear of the two-wheeled vehicle body, and a steering system steering the front wheel is disclosed. The two-wheeled vehicle includes auxiliary wheels connected to the front wheel on both sides of the two-wheeled vehicle body and steered together with the front wheel by the steering system, lifting devices configured to adjust distances of the auxiliary wheels from the ground, and gap adjusting devices configured to adjust lateral gaps of the auxiliary wheels from the two-wheeled vehicle body. The auxiliary wheels are spaced apart from the ground while traveling straight. And an inclination of the two-wheeled vehicle body while turning is limited as one of the auxiliary wheels comes into contact with the ground.

Abstract: A two-wheeled vehicle which includes a two-wheeled vehicle body, a front wheel and a rear wheel respectively rotatably installed at a front and a rear of the two-wheeled vehicle body, and a steering system steering the front wheel is disclosed. The two-wheeled vehicle includes auxiliary wheels connected to the front wheel on both sides of the two-wheeled vehicle body and steered together with the front wheel by the steering system, lifting devices configured to adjust distances of the auxiliary wheels from the ground, and gap adjusting devices configured to adjust lateral gaps of the auxiliary wheels from the two-wheeled vehicle body. The auxiliary wheels are spaced apart from the ground while traveling straight. And an inclination of the two-wheeled vehicle body while turning is limited as one of the auxiliary wheels comes into contact with the ground.

Abstract: A photographic lens and a photographic apparatus including the same are provided. The photographic lens includes a first lens including a convex surface toward an object side and having a positive refractive power, a second lens including a concave surface toward an image side and having a negative refractive power, a third lens having a positive refractive power or a negative refractive power, a fourth lens having a positive refractive power or a negative refractive power, a fifth lens including a convex surface toward the image side and having a positive refractive power, and a sixth lens including a concave aspherical shape with respect to an optical axis toward the image side and having a negative refractive power. The first to sixth lenses may be sequentially arranged from the object side to the image side.

Abstract: An electronic device implements a method for providing a service in the electronic device. The electronic device includes a communication module configured to provide short-range wireless communication, and a control module. The control module is configured to broadcast a service request for a service by short-range wireless communication through the communication module. The control module is configured to receive service information corresponding to the service from at least one external electronic device receiving the service request, and to execute at least one function related to the service based on at least one piece of the service information.

Abstract: Provided is a photographing apparatus. The photographing apparatus includes: a main body having an image pickup device disposed therein; a middle cover disposed in a back side of the main body and includes a first opening disposed to correspond to a position of the image pickup device; a first connector formed on the middle cover and around the first opening, where the first connector is configured to couple to an external optical component and is disposed so that the an optical axis of the image pickup device coincides with an optical axis of the external optical component, when the external optical component is coupled to the first connector; and a rear cover disposed on the middle cover and includes a second opening disposed to correspond to the position of the image pickup device.

Abstract: An imaging lens system is provided. The imaging lens system includes a first lens that includes a convex object side surface and has a positive refractive power; a second lens that includes a concave image plane side surface and has a negative refractive power; a third lens that has a positive or negative refractive power; a fourth lens that includes a convex image plane side surface and has a positive or negative refractive power; a fifth lens that includes a convex image plane side surface and has a negative refractive power; and a sixth lens that has a negative refractive power, wherein the first through sixth lenses are arranged in order from an object side to an image plane side.

Abstract: An imaging lens includes a first lens having a convex surface toward an object and positive refractive power, a second lens having positive or negative refractive power, a third lens having positive or negative refractive power, a fourth lens having a convex surface toward an image plane and positive refractive power, and a fifth lens having a concave surface toward an object and negative refractive power. The first through fifth lenses are arranged in order from an object to an image plane. The imaging lens satisfies the condition ?0.2?(Y?yp)/yp??0.05, wherein Y indicates an image height of a real chief ray, and yp indicates an image height of a paraxial chief ray.

Abstract: A photographic lens and a photographic apparatus including the same are provided. The photographic lens includes a first lens including a convex surface toward an object side and having a positive refractive power, a second lens including a concave surface toward an image side and having a negative refractive power, a third lens having a positive refractive power or a negative refractive power, a fourth lens having a positive refractive power or a negative refractive power, a fifth lens including a convex surface toward the image side and having a positive refractive power, and a sixth lens including a concave aspherical shape with respect to an optical axis toward the image side and having a negative refractive power. The first to sixth lenses may be sequentially arranged from the object side to the image side.

Abstract: A photographic lens and a photographic apparatus including the same are provided. The photographic lens includes a first lens including a convex surface toward an object side and having a positive refractive power, a second lens including a concave surface toward an image side and having a negative refractive power, a third lens having a positive refractive power or a negative refractive power, a fourth lens having a positive refractive power or a negative refractive power, a fifth lens including a convex surface toward the image side and having a positive refractive power, and a sixth lens including a concave aspherical shape with respect to an optical axis toward the image side and having a negative refractive power. The first to sixth lenses may be sequentially arranged from the object side to the image side.

Abstract: A washing machine for washing laundry is disclosed herein and includes a washing tub which has a water inlet port through which washing water flows into the washing tub, a filter guide unit which is installed to cover the water inlet port and has a filter mounting portion comprising a set of grooves, a filter unit which is mounted on the filter mounting portion and has a first set of ribs and a set of second ribs which are provided at the lateral sides of the filter unit, and the set of grooves which is provided in the filter mounting portion and allows the set of second ribs to be fastened thereto. A washing method using the washing machine is also disclosed. Foreign substances such as dust or lint are removed from the washing water using the filter unit and foreign substances are prevented from attaching to the laundry.

Abstract: An imaging lens system includes a first lens that includes a convex object-side surface and has a positive refractive power; a second lens that includes a concave image plane-side surface and has a negative refractive power; a third lens; a fourth lens that includes two spherical surfaces and has a negative refractive power; a fifth lens that includes a convex image plane-side surface and has a positive refractive power; and a sixth lens that has a negative refractive power, wherein the first through sixth lenses are arranged in order from an object side to an image plane side.

Abstract: A zoom lens and a photographing apparatus having the zoom lens are provided. The zoom lens includes: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group including a shutter and having a positive refractive power; a fourth lens group having a positive refractive power, a fifth lens group having a negative refractive power, and a sixth lens group having a positive refractive power, wherein the first, second, third, fourth, fifth, and sixth are arranged from an object side toward an image side, and when the zoom lens zooms from a wide angle position to a telephoto position, the third lens group is fixed, and the first, second, fourth, fifth, and sixth lens groups are moved.

Abstract: Contactless cards and a corresponding anti-collision coupling method are provided, where the method includes requesting that the cards transmit their unique identifiers that each include a fixed number of bytes, receiving the unique identifiers simultaneously as byte-wise positive pulses, counting the received positive pulses, and determining that more than one card responded if the number of received positive pulses exceeds the fixed number of bytes; and where the contactless cards each include a unique identifier having a number of bytes, a receiver for receiving an anti-collision command indicative of a desired identifier byte, a comparator in signal communication with the receiver for comparing the desired identifier byte with a corresponding byte of the unique identifier, and a transmitter responsive to the comparator for transmitting the unique identifier as byte-wise positive pulses if the desired identifier byte matches the corresponding byte of the unique identifier.