Abstract: The present inventions are a method for production of hydrogen which decomposes water into hydrogen by oxidation of metals only when the metals are exposed to the water, while preventing oxidation of pure metal nanoparticles using block copolymers and, in addition, hydrogen produced by the method described above. The method of the present invention has advantages of improved convenience and simplicity, achieves a preferable approach for hydrogen storage because the metal nanoparticles enclosed by the block copolymer have the ease of delivery and reaction thereof. Additionally, the method of the present invention only using water and the metal is considered eco-friendly and useful in industrial energy applications.

Abstract: Disclosed are transition metal-carbon nanotube hybrid catalysts in which a transition metal having high catalytic activity is uniformly distributed on surface of a carbon nanotube containing nitrogen so as to maximize a surface area of the catalyst exhibiting catalytic activity, a method for preparation thereof, and a method for generation of hydrogen from an alkaline medium using the prepared catalyst. The transition metal-carbon nanotube hybrid catalyst containing N2 according to the present invention is effectively used in a variety of industrial applications utilizing hydrogen energy such as a hydrogen storage systems for fuel cells, fuel storage systems for hydrogen fuel vehicles, electric vehicles and/or as energy sources for electronic devices.

Abstract: The present invention relates to a method for manufacturing a transition metal-carbon nanotube hybrid material using nitrogen as a medium. The present invention is characterized in that nitrogen-added carbon nanotube is grown in the presence of metal catalyst particles by reacting an hydrocarbon gas with a nitrogen gas by a chemical vapor deposition (CVD) and a transition metal-carbon nanotube hybrid material where a transition metal is uniformly attached to the entire carbon nanotube structure in which nitrogen with a great chemical reactivity is added as heterogeneous elements is chemically manufactured. Therefore, the present invention does not use an acid treatment required to attach transition-metal atoms to the carbon-nanotube, a surface treating process using a surfactant and the like and an inhibitor for preventing the coagulation of the transition metal so that a simplification of the process is obtained and the method is an environment-friendly method.

Abstract: A software testing device and method is provided. The software testing device includes: a test script unit for outputting its holding test script when a test execution signal is inputted; a test data creating unit for selecting at least one test data from at least one predetermined test data set and creating test data, and combining the created test data to the test script; and a test execution unit for receiving the test data from the test data creating unit, and executing test by the test script combined with the received test data.

Abstract: A noise tolerant voltage controlled oscillator is described. The voltage controlled oscillator include a varactor element as part of an LC tank circuit. The varactor element is biased by a bias signal and a bias-dependent control signal. The bias-dependent control signal tunes the LC tank circuit. Because the control signal is bias-dependent, noise and other deleterious influences do not cause the varactor element to deviate in capacitance. Instead, the bias-dependent control signal is a tuning signal that is centered around the bias signal, which allows the varactor element to provide a constant capacitance in the event of a varying bias signal.

Abstract: An apparatus for generating ozone and anion capable of respectively controlling an ozone generator and an anion generator is disclosed. The apparatus includes an ozone generator, an ozone generator-driving portion, a second power source supplying power to the ozone generator-driving portion, an anion generator, an anion generator-driving portion, a circulating fan circulating the generated anion, a first power source supplying power to the anion generator-driving portion, a selecting valve selectively discharging the anion generated from the anion generator to a water purifier 100 or an ozone container, an activated carbon filter removing smell of the ozone introduce through the selecting valve into the water purifier, a controlling portion controlling the anion generator-driving portion and the ozone generator-driving portion, an operating portion inputting an external instruction to the controlling portion, and a timer controlling a reserving function of the operating portion.

Abstract: There is disclosed an apparatus for generating ozone and anion, which is capable of respectively controlling an ozone generator and an anion generator according to a using purpose and also conveniently controlling various functions.