Abstract:
The present invention provides a wing-flapping flying apparatus, which can fly by moving its wings similar to a bird hovering or flying in the air by flapping its wings. The wing-flapping flying apparatus comprises: a body; a rotating shaft rotatably joined to the body; driving means for rotating the rotating shaft; and wings reciprocated between two points and connected to the rotating shaft so as to be rotated together with the rotating shaft and to be relatively torsionally rotated with respect to the rotating shaft. The wing-flapping flying apparatus generates lift throughout an entire wing- flapping movement without generating lift only throughout the half of a wing-flapping movement or offsetting the generated lift by the other half of the wing-flapping movement. Therefore, the wing- flapping flying apparatus can provide not only a stable flight but also a softly hovering or ascending and descending flight.
Abstract:
The present invention provides for catalysts for selective catalytic reduction of nitrogen oxides. The catalysts comprise metal oxides supporters, vanadium an active material and antimony a promoter that acts as a catalyst for reduction of nitrogen oxides, and at the same time, can promote higher sulfur poisoning resistance and low temperature catalytic activity. The amount of antimony of the catalysts is preferably 0.5 - 7 wt %.
Abstract:
The present invention relates to bicyclic tetrahydrofuran lactone derivatives and a preparation method thereof. Particularly, the present invention relates to a process of preparing the above compounds by performing an intramolecular cyclization of tetrahydrofuran-allenic acid derivatives in the presence of a phenyl halide, a palladium catalyst and a base.
Abstract:
The present invention relates to tricyclic tetrahydrofuran lactone derivatives and a preparation method thereof. Particularly, the present invention relates to a process of preparing the above compounds 'tetrahydrofuran lactone derivatives' by performing an intramolecular cyclization of tetrahydrofuran-allenic acid derivatives in the presence of a phenyl halide, a palladium catalyst and a base.
Abstract:
An electrode pattern for a solid oxide fuel cell (SOFC) comprises a plurality of micro-sized first electrode patterns formed on an upper surface of a substrate including an electrolyte layer, and a plurality of micro-sized second electrode patterns formed between the first electrode patterns. The electrode pattern is formed by using a mold fabricated by a photoresist process. In order to form the electrode pattern, a paste for an electrode including a thermo-setting resin and an electrode powder is prepared. The electrode having a micro-sized or sub-micro sized width and a high precision is simply fabricated, and a miniaturized SOFC having a high function is fabricated.
Abstract:
There is provided a distributed Bragg's reflector (DBR) comprising a substrate and an unit distributed Bragg's reflector (DBR) layer, wherein a multi-layer is laminated on the substrate. The unit DBR layer is composed of a multi-layer laminated structure of unit digital-alloy multinary compound semiconductor layer/multinary compound semiconductor layer or unit digital-alloy multinary compound semiconductor layer/unit digital-alloy multinary compound semiconductor layer. The unit digital-alloy multinary compound semiconductor layer is composed of the multi-layer laminated structure of the first layer of multinary compound semiconductor and the second layer of a different multinary compound semiconductor on said first layer. The digital-alloy distributed Bragg's reflector of the present invention has a uniform quality on the substance area and the filter and reflector having uniformly high quality can be mass produced by using the reflector.
Abstract:
The present invention relates to a novel use of a transgenic mouse deficient in αlG T-type calcium channel as an animal model for the study of neuropathic diseases, more precisely, a novel use of a transgenic mouse having resistance against neuripathic pain as an animal model for the development of a therapeutic agent and a treatment method for human neuropathic diseases. The transgenic mouse deficient in αlG T-type calcium channel having resistance against neuropathic pain, provided by the present invention, can be effectively used for the development of a therapeutic agent and a treatment method for human neuropathic diseases.
Abstract:
The present invention provides for a current induced switching magnetoresistance device comprising a magnetic multilayer composed of a first ferromagnetic layer, a nonferromagnetic layer, and a second ferromagnetic layer, wherein the first ferromagnetic layer has an upper electrode, the second ferromagnetic layer pinned by an antiferromagnet, wherein the antiferromagnet contains a lower electrode at its lower part, and the second ferromagnetic layer is embedded with a nano oxide layer. It is preferable to have at least a part of the lower electrode in contact with the second ferromagnetic layer. The magnetoresistance device of the present invention provides a lower critical current (Ic) for the magnetization reversal and has an increased resistance.
Abstract:
A highly efficient desulfurization method for removing a hydrogen sulfide and a sulfur dioxide simultaneously comprises the step of contacting a gas containing the hydrogen sulfide and the sulfur dioxide with water, or an aqueous solution containing a first heterogeneous catalyst for desulfurization to oxidize the hydrogen sulfide with the sulfur dioxide. 3~5% sulfur-containing tail gas exhausted from, especially, Claus Process can be treated at a high efficiency of over 99%.
Abstract:
Disclosed is a capsule type endoscope control system which can move to any position, rotate or stop the capsule type endoscope in a human body by a remote control system outside the human body. There is provided a capsule type endoscope control system comprising: a medical capsule equipped with at least one permanent magnet, comprising a wireless transmission circuit for transmitting a series of signals to outside of the body; 2-DOF rotary joint unit for rotating an external permanent magnet in at least two directions, the external permanent magnet applying magnetic forces to the permanent magnets provided in the capsule; a distance sensor for measuring a distance between the external permanent magnet and a surface of the human body; a cartesian coordinate robot for moving the external permanent magnet; a bed for supporting the human body, the bed being able to roll within a certain degree; and a remote control unit outside the human body for controlling operations of the 2-DOF rotary joint unit, the bed and the cartesian coordinate robot.