Abstract:
A heart valve prosthesis and a method of fabricating the same. The heart valve prosthesis uses a leaflet of pig pericardium or a leaflet of cattle pericardium, which has a suitable thickness according to the size of the valve, and a stent. The heart valve prosthesis is fabricated by placing a valve body over a Dacron body, binding the valve body to the Dacron body using stitching fiber, rolling the Dacron body into a cylindrical form such that the valve body is located inside, binding opposite edges of the Dacron body to each other using stitching fiber, and inserting the resultant structure into a stent, which is knitted using a shape memory alloy wire. The heart valve prosthesis is friendly to and is not rejected by human tissue, is free from deformation, and can be implanted using a non-invasive manner without incising the chest wall of a patient.
Abstract:
An apparatus and method for processing a substrate using neutralized beams are provided. A substrate processing apparatus includes an ion source generating device configured to form an ion source. An ion extraction device is configured to extract and accelerate ions from the ion source. An ion neutralizing device is configured to convert the ions extracted and accelerated from the ion extraction device into neutralized beams. A remaining portion of the ions extracted and accelerated from the ion extraction device is not converted into the neutralized beams. A substrate support is configured to support a substrate such that the neutralized beams are directed towards the substrate support. A substrate power supply is configured to apply a voltage to the substrate support such that the remaining portion of the ions that is not converted into the neutralized beams is directed away from the substrate support by the applied voltage of the substrate.
Abstract:
Disclosed are a semiconductor device, a light emitting device, and a method of manufacturing the same. The semiconductor device includes a substrate, a plurality of rods aligned on the substrate, a metal layer disposed on the substrate between the rods, and a semiconductor layer disposed on and between the rods. Electrical and optical characteristics of the semiconductor device are improved due to the metal layer.
Abstract:
A mobile terminal including a metal case and an antenna structure that can exhibit optimum radiation performance is provided. The antenna structure includes an antenna having a radiation unit for transmitting and for receiving electric waves, a Printed Circuit Board (PCB) to which the antenna is mechanically coupled at one surface thereof and having a power supply unit electrically coupled to the radiation unit, and a case constructed using a metal material within which the PCB is disposed, wherein the case has at least one slot formed in a surface thereof opposite to the surface to which the PCB is fastened and adjacent to the radiation unit.
Abstract:
Provided are a color to grayscale image conversion method of converting a color image into a grayscale image while maintaining original features of the color image, and a recording medium storing a program for performing the same. When an original color image is input, a target gradient with the features of the input original color image is acquired, and a global mapping function for converting the original color image into a grayscale image is determined based on the acquired target gradient. Thereafter, the original color image is converted into a grayscale image using the determined global mapping function. Therefore, it is possible to quickly convert a color image into a grayscale image, and to acquire a high-quality grayscale image with features of color difference included in the original color image.
Abstract:
A method of manufacturing a nitride semiconductor device is disclosed. The method includes forming a gallium nitride (GaN) epitaxial layer on a first support substrate, forming a second support substrate on the GaN epitaxial layer, forming a passivation layer on a surface of the other region except for the first support substrate, etching the first support substrate by using the passivation layer as a mask, and removing the passivation layer and thereby exposing the second support substrate and the GaN epitaxial layer.
Abstract:
Provided are: a multi-layered lamellar granule comprising a nucleating agent, a ceramide-containing artificial stratum corneum lipid lamellar layer which encases the nucleating agent and a polymer layer disposed on the artificial stratum corneum lipid lamellar layer; and an external skin application composition comprising the same. The external skin application composition shows improved moisturizing and barrier repair capabilities when applied to the skin, which can be advantageously used in cosmetics and pharmaceuticals.
Abstract:
Disclosed is a method for establishing a wireless link key between a remote device and a group device. In the method, the remote device obtains a group identifier from the group device, and determines whether the group device is associated with a group having a trust association with the remote device. When the group device is determined to be associated with a group having an established trust association with the remote device, the remote device forwards a link setup request to the group device for virtually pairing with the group device using the trust association to establish the wireless link key. When the group device is determined not to be associated with a group having an established trust association with the remote device, the remote device forwards a pairing request to the group device for pairing with the group device to establish the wireless link key.
Abstract:
The present invention relates to a nitride semiconductor substrate such as gallium nitride substrate and a method for manufacturing the same. The present invention forms a plurality of trenches on a lower surface of a base substrate that are configured to absorb or reduce stresses on the base substrate that become larger from a central portion of the base substrate towards a peripheral portion when growing a nitride semiconductor film. That is, the present invention forms the trenches on the lower surface of the base substrate such that pitches get smaller or widths or depths get larger from the central portion of the base substrate towards the peripheral portion.
Abstract:
An antenna applied to a slide type mobile communication terminal includes a first board mounted in a first body; a second board mounted in a second body; a radiating element mounted to the second body; and a first contact formed to connect to the second board at one end and contact with the first board at the other end when the first body slides. Accordingly, an antenna with directionality can be realized for applications to short range communication systems.