Abstract:
Provided are: a non-oriented electrical steel sheet having outstanding magnetic properties and comprising, as percentages by weight, from 1.0 to 3.0% of Al, from 0.5 to 2.5% of Si, from 0.5 to 2.0% of Mn, from 0.001 to 0.004% of N, from 0.0005 to 0.004% of S and a balance of Fe and other unavoidably incorporated impurities, wherein the Al, Mn, N and S are included so as to satisfy the compositional formulae {[Al]+[Mn]}≦3.5, 0.002≦{[N]+[S]}≦0.006, 300≦{([Al]+[Mn])/([N]+[S])}≦1,400; and a production method therefor. By optimising the Al, Si, Mn, N and S added components in this way, the distribution density of coarse inclusions is increased, thereby making it possible to improve crystal-grain growth properties and domain wall mobility and so produce the highest grade of non-oriented electrical steel sheet having superior magnetic properties, low hardness, and superior customer workability and productivity.
Abstract:
The present invention discloses a tendon controlled mobile platform configured to move within a work space defined by a structure. The tendon controlled mobile platform of the present invention, which includes: a mobile platform including a main frame, a plurality of upper winches coupled to an upper part of the main frame, and a plurality of lower winches coupled to a lower part of the main framed, the mobile platform being placed with the work space; a plurality of first wires having respective one ends coupled to lower sides of the structure and respective the other ends coupled to the upper winches, the lengths of the first wires being adjustable; and a plurality of second wires having respective one ends coupled to upper sides of the structure and respective the other ends coupled to the lower winches, the lengths of the second wires being adjustable, can expand the movement range of the mobile platform, thereby expanding the work area, and can easily move the work equipment to an adjacent work area.
Abstract:
A method and apparatus for scheduling in a Wireless Local Area Network (WLAN) mesh communication system including a plurality of Mesh Access Points (MAPs) are provided, in which, when a message to be transmitted from a first MAP of the MAPs to MAPs adjacent to first MAP is generated, setting a first interval for transmitting the generated message during a predetermined period, and setting a remaining interval excluding the first interval during the predetermined period as a second interval for receiving messages from the adjacent MAPs.
Abstract:
A liquid crystal display device and a method for manufacturing the same are disclosed. In an embodiment of the present invention, a liquid crystal display device and a method of manufacturing the liquid crystal display device includes a first substrate that has a first electrode formed thereon, a second substrate that faces the first substrate, a liquid crystal layer that is formed between the first substrate and the second substrate, and a first alignment layer that is formed on the first substrate and is in contact with the liquid crystal layer. Here, the first alignment layer includes a first alignment base layer that is photoaligned, and a first alignment controlling layer that is extended from the inside of the first alignment base layer.
Abstract:
A liquid crystal display according to an exemplary embodiment of the present invention includes: a substrate; a partition formed on the substrate and defining a pixel; a plurality of protrusion members formed with the same material as the partition on the substrate, and disposed with a linear plane shape inside the pixel defined by the partition; and a color filter filled inside the pixel defined by the partition. Accordingly, in the liquid crystal display according to an exemplary embodiment of the present invention, a plurality of transparent protrusion members are formed in the pixel defined by the partition such that movement of color filter ink dripped through an Inkjet method is controlled such that a color filter may be planarized on the whole surface of the pixel.
Abstract:
Provided are a method and system for determining a precise orbit of a LEO satellite. The method includes: estimating a precise ephemeris of a global positioning system (GPS) satellite by fitting an orbit perturbation-based GPS dynamics model to observation data of the GPS satellite received from a GPS observatory and estimating a precise ephemeris of a Galileo satellite by fitting an orbit perturbation-based Galileo dynamics model to observation data of the Galileo satellite received from a Galileo observatory; determining an initial orbit value of a LEO satellite by fitting an orbit perturbation-based LEO satellite's basic dynamics model to navigation data received from the LEO satellite; and determining the precise orbit of the LEO satellite by calculating a difference between observation values, which are calculated based on a GPS and Galileo data received from the LEO satellite, the GPS observatory and the Galileo observatory, and calculated values, which are calculated based on an orbit perturbation-based LEO satellite's dynamics model that was calculated using the initial orbit value of the LEO satellite and the precise ephemeris of the GPS and Galileo satellites. Since both the GPS and Galileo data are received and used to determine the precise orbit of a LEO satellite, more precise orbit determination can be achieved.
Abstract:
A method for packaging a semiconductor is provided to allow uniform coating of a die attachment paste, shorten a B-staging time, and improve die pick-up characteristics and die attachment characteristics. This method includes preparing a die attachment paste with a viscosity of 1,500 to 100,000 cps; rotating a wafer and applying the die attachment paste to an upper surface of the wafer into a predetermined thickness; and B-staging the paste applied on the wafer. This method makes it possible to reduce costs by substituting for WBL (Wafer Backside Lamination) film, uniformly apply a die attachment paste to a wafer, freely control a thickness of applied die attachment paste by adjusting viscosity and dosage of discharged paste and a speed of a spin coater, and also shorten a process time by decreasing a B-staging time.
Abstract:
Provided are an apparatus and method for transmitting/identifying a location based on local communication. The apparatus, includes: a location information calculating unit for receiving a Global Positioning System (GPS) signal from a GPS satellite and calculating location information; own location transmitting unit for transmitting a signal, in which the calculated location information and recognition information are inserted, through a local communication antenna; a counterpart location receiving unit for receiving a signal transmitted from another location transmitting/identifying apparatus located in a close range through the local communication antenna; and a counterpart location identifying unit for checking the received signal and identifying a location of another location transmitting/identifying apparatus.
Abstract:
A method of creating a global coordinate of a polyhedral hollow frame includes a first step of providing a plurality of transmitters on a reference surface in the hollow frame, providing a plurality of reference sensors to create the coordinate of the reference surface, and creating a local coordinate frame of the reference surface on the basis of the positional coordinates measured by the reference sensors; a second step of providing reference sensors at common points of a first vertical surface neighboring to the reference surface to measure and store the coordinates of the common points; a third step of providing a plurality of transmitters and reference sensors on the first vertical surface neighboring to the reference surface to create a local coordinate frame of the first vertical surface; a fourth step of transforming the local coordinate frames created at the first and the third steps into a global coordinate frame using the coordinates of the common points measured at the second step; a fifth step of repeatedly performing the second step to the fourth step on remaining vertical surfaces of the polyhedral hollow frame to transform the respective local coordinate frames into a unified global coordinate frame; a sixth step of providing transmitters on an upper surface neighboring to each vertical surface to obtain the relationship between the global coordinate frame and a local coordinate frame of the upper surface using the coordinates of the common point; and a seventh step of creating and applying a global coordinate frame using the relationship obtained at the sixth step.
Abstract:
Provided is a method for transmitting beacon timing information from a transmission node in a wireless Local Area Network (LAN) mesh network. In the method, each of a plurality of nodes transmits a beacon signal with its unique offset within a beacon signal transmission time period and the transmission node periodically transmits beacon timing information including a first unique offset within the beacon signal transmission time period. The transmission node sets a second offset different from the first offset and transmits probe beacon timing information including the first offset and the second offset.