Abstract: A radar apparatus, an antenna apparatus, and a data acquisition method are provided, which can reduce the size of a radar apparatus as well as maintaining angular resolution.

Abstract: Disclosed is a method for forming a conversion coating on the outer surface of magnesium or a magnesium alloy by surface treatment with acidic and alkaline solutions. The method is carried out in an environmentally friendly manner to improve the corrosion resistance of the magnesium or magnesium alloy. The method minimizes the damage to the appearance of the magnesium or magnesium even after surface treatment and maximizes the attractive appearance of the magnesium or magnesium alloy.

Abstract: Disclosed herein is a method for the surface treatment of magnesium or a magnesium alloy by anodization to form an anodized oxide coating on the magnesium or magnesium alloy. The method comprises: removing impurities and an oxide layer present on the surface of magnesium or a magnesium alloy using a strongly alkaline aqueous solution (pretreatment); and immersing the pretreated magnesium or magnesium alloy in an alkaline electrolyte and applying a direct current having a current density of 3 A/dm2 or less to the electrolyte to form a magnesium oxide coating (microarc plasma anodization).

Abstract: Disclosed herein are a polyimide-polybenzoxazole copolymer, a method for preparing thereof and a gas separation membrane comprising the same. More specifically, provided are a polyimide-polybenzoxazole copolymer simply prepared through thermal-rearrangement performed by thermally treating a polyimide-poly (hydroxyimide) copolymer as a precursor, a method for preparing the same, and a gas separation membrane comprising the same. The copolymer shows superior gas permeability and gas selectivity, thus being suitable for use in gas separation membranes in various forms such as films, fibers or hollow fibers. The gas separation membrane thus prepared can advantageously endure even harsh conditions such as long operation time acidic conditions and high humidity due to the rigid polymer backbone present in the copolymer.

Abstract: Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups and acid dianhydride, obtaining polypyrrolone from the polyaminoimide, subjecting the polypyrrolone to alkaline treatment, and subjecting the alkaline-treated polypyrrolone to heat treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores.

Abstract: Disclosed is a method of horizontally growing carbon nanotubes, in which the carbon nanotubes can be selectively grown in a horizontal direction at specific locations of a substrate having catalyst formed thereat, so that the method can be usefully utilized in fabricating nano-devices. The method includes the steps of: (a) forming a predetermined catalyst pattern on a first substrate; (b) forming a vertical growth preventing layer on the first substrate, which prevents carbon nanotubes from growing in a vertical direction; (c) forming apertures through the vertical growth preventing layer and the first substrate to expose the catalyst pattern through the apertures; and (d) synthesizing carbon nanotubes at exposed surfaces of the catalyst pattern in order to grow the carbon nanotubes in the horizontal direction.

Abstract: Disclosed is a method of horizontally growing carbon nanotubes, in which the carbon nanotubes can be selectively grown in a horizontal direction at specific locations of a substrate having catalyst formed thereat, so that the method can be usefully utilized in fabricating nano-devices. The method includes the steps of: (a) forming a predetermined catalyst pattern on a first substrate; (b) forming a vertical growth preventing layer on the first substrate, which prevents carbon nanotubes from growing in a vertical direction; (c) forming apertures through the vertical growth preventing layer and the first substrate to expose the catalyst pattern through the apertures; and (d) synthesizing carbon nanotubes at exposed surfaces of the catalyst pattern in order to grow the carbon nanotubes in the horizontal direction.

Abstract: Disclosed is a method of forming a silica layer for an optical waveguide. The present invention includes the steps of preparing a chamber having a magnetic coil, a gas supply unit, and a support and injecting a reactant gas in the chamber to deposit the silica layer on a substrate mounted on the support by high density plasma chemical vapor deposition. The present invention provides the high deposition ratio of the silica layer since the ionization of the reactant gas proceeds fast due to the high density plasma induced by the magnetic coil. Moreover, the sputtering process by the inert gas and the silica layer depositing process are simultaneously carried out to provide the silica layer with a high deposition ratio and high density, whereby additional annealing is unnecessary as well as the process can be carried out at a low temperature to fabricate various silica-polymer mixed waveguide.

Abstract: Disclosed is a method of horizontally growing carbon nanotubes, in which the carbon nanotubes can be selectively grown in a horizontal direction at specific locations of a substrate having catalyst formed thereat, so that the method can be usefully utilized in fabricating nano-devices. The method includes the steps of: (a) forming a predetermined catalyst pattern on a first substrate; (b) forming a vertical growth preventing layer on the first substrate, which prevents carbon nanotubes from growing in a vertical direction; (c) forming apertures through the vertical growth preventing layer and the first substrate to expose the catalyst pattern through the apertures; and (d) synthesizing carbon nanotubes at exposed surfaces of the catalyst pattern in order to grow the carbon nanotubes in the horizontal direction.

Abstract: The new process for preparing ethyl 3-(2,5,6-trihalopyridin-3-yl)-3-oxopropionate from 2,5,6-trihalo-3-cyanopyridine in accordance with the present invention comprises reacting 2,5,6-trihalo-3-cyanopyridine with ethyl haloacetate at the presence of a transition metal in powder in anhydrous solvent, and treating the resulting solution with HCl. In particular, the new process for preparing ETPO from THCP comprises heating 2,5,6-trihalo-3-cyanopyridine and a transition metal in powder in anhydrous solvent to the boiling point, reacting 2,5,6-trihalo-3-cyanopyridine with ethyl haloacetate by adding ethyl haloacetate dropwise to the resulting solution, cooling the resulting solution to about 10° C., adding concentrated HCl and distilled water to the resulting solution during agitation thereof, and filtering the product.

Abstract: Disclosed is a method of horizontally growing carbon nanotubes, in which the carbon nanotubes can be selectively grown in a horizontal direction at specific locations of a substrate having catalyst formed thereat, so that the method can be usefully utilized in fabricating nano-devices. The method includes the steps of: (a) forming a predetermined catalyst pattern on a first substrate; (b) forming a vertical growth preventing layer on the first substrate, which prevents carbon nanotubes from growing in a vertical direction; (c) forming apertures through the vertical growth preventing layer and the first substrate to expose the catalyst pattern through the apertures; and (d) synthesizing carbon nanotubes at exposed surfaces of the catalyst pattern in order to grow the carbon nanotubes in the horizontal direction.