Abstract:
PROBLEM TO BE SOLVED: To provide nano-particles having excellent effects of stability and sustained release of a protein drug, especially greatly reducing the initial burst of the drug and having a hydrated gel membrane functionalized with polysaccharides, to provide a sustained release type drug delivery system comprising the nano-particles and to provide a method for producing the drug delivery system. SOLUTION: The nano-particles comprise a biodegradable polymer, a biocompatible polymer emulsifying agent and the polysaccharides. The nano-particles are composed of an inner core and an outer hydrated gel membrane in which the polysaccharides are physically fixed and have the hydrated gel membrane functionalized with the polysaccharides. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Provided is a method for fabricating a high-efficiency flexible thin film solar cell using a chalcopyrite-based compound semiconductor, including: forming a sacrificial layer on a substrate; forming a solar cell structure including a diffusion barrier dielectric on the top of the sacrificial layer; forming a support film on the top of the solar cell structure; carrying out selective etching of the sacrificial layer to separate the solar cell structure and the support film from the substrate; and integrating the solar cell structure with a heterogeneous flexible host substrate and removing the support film. In the high-efficiency flexible thin film solar cell using a chalcopyrite-based compound semiconductor according to the present disclosure, the thin film of GaAs diffusion barrier dielectric prevents diffusion of impurities since it has an optimized thermal expansion coefficient with reference to the CIGS (Cu(In,Ga,Al)(Se,S)) absorption layer and the lower electrode molybdenum layer, and inhibits lower electrode cracking and CIGS layer separation caused by the difference of thermal expansion coefficient of the CIGS layer, thereby improving the efficiency of the solar cell. In addition, the method uses heterogeneous integration technology and epitaxial lift off (ELO) that enables recycle of a substrate, and thus it is possible to provide a high-efficiency flexible thin film solar cell having improved cost efficiency and flexibility.
Abstract:
A transmission diffraction device having a high diffraction order and a method of fabricating the same are provided. The diffraction device includes a light transmissible body, and at least one V-shaped groove formed in the light transmissible body. The V-shaped groove includes reflection and refraction planes. This diffraction device produces high-order diffracted light. As the diffraction order of the diffracted light becomes higher, the resolving power of the diffraction device can be improved.
Abstract:
Provided is a floating-type microbial fuel cell capable of effectively generating energy from organic contaminants of contaminated waters. The floating-type microbial fuel cell includes a cathode, an anode electrically connected to the cathode, and a floating unit connected to the cathode and/or the anode and floatable in a substrate solution, wherein the cathode is positioned at a region in the substrate solution having a dissolved oxygen concentration higher than that of a region at which the anode is positioned, and the anode is positioned at a region in the substrate solution having an amount of electrons generated by microorganisms larger than that of a region at which the cathode is positioned.
Abstract:
A sulfonated polyUrylene ether) copolymer, a method of preparing the same, and a polymer electrolyte membrane using the sulfonated poly(arylene ether) copolymer are provided. A sulfonated poly(arylene ether) copolymer containing a sulfonic acid is synthesized by poly condensing a dihydroxy monomer having a sulfonate group with a dihalide monomer, or by polycondensing a dihalide monomer having a sulfonate group with a dihydroxy monomer. Moreover, a crosslinkable dihydroxy monomer or a crosslinkable dihalide monomer is polycondensed with the obtained poly(arylene ether) copolymer, thus enable crossl inking between polymers. A polymer electrolyte membrane for a fuel cell formed using a poly(arylene ether) copolymer containing a crosslinkable moiety maintains the equivalent or superior levels to existing sulfonated poly(arylene ether) polymer or the Nafion membrane commercially available at present in terms of thermal stability, mechanical stability, chemical properties, film formability, and the like, and shows considerably improved proton conductivity and cell performances.
Abstract:
Provided are a vinyl-biphenylpyridine monomer and a polymer thereof. More particularly, the present invention provides a vinyl-biphenylpyridine monomer having a side chain of pyridine or phenylpyridine as a functional group, a homopolymer of which molecular weight and molecular weight distribution are controlled using the monomer, and a block copolymer of which molecular structure and molecular weight are controlled to facilitate synthesis of an organic metal complex. Accordingly, the present invention provides a vinyl-biphenylpyridine monomer and a polymer thereof which are effectively used as nano and optical functional materials.
Abstract:
The example embodiment of the present invention provides an acoustic model adaptation method for enhancing recognition performance for a non-native speaker's speech. In order to adapt acoustic models, first, pronunciation variations are examined by analyzing a non-native speaker's speech. Thereafter, based on variation pronunciation of a non-native speaker's speech, acoustic models are adapted in a state-tying step during a training process of acoustic models. When the present invention for adapting acoustic models and a conventional acoustic model adaptation scheme are combined, more-enhanced recognition performance can be obtained. The example embodiment of the present invention enhances recognition performance for a non-native speaker's speech while reducing the degradation of recognition performance for a native speaker's speech.
Abstract:
Provided are a method of fabricating a microlens using selective etching of a compound semi-conductor and a method of fabricating a photoelectric device having the microlens. The formation of the microlens includes patterning a compound semiconductor layer and removing a lateral surface of the compound semiconductor layer to form a roughly hemispheric lens. The lateral surface of the compound semiconductor layer is removed by a digital alloy method. In particular, the lateral surface of the compound semiconductor layer is removed by a wet etching process.
Abstract:
Provided are an apparatus and method of notifying received information using vibrators and a system employing the same. The apparatus includes a wireless receiving unit receiving a signal transmitted in a wireless manner through an antenna, a vibrator array unit in which a plurality of vibrators are disposed in a matrix arrangement and spaced apart from each other on a substrate, a driving unit independently driving the plurality of vibrators, and a control unit controlling the driving unit so that the plurality of vibrators can be selectively driven according to received vibrating pattern information if the vibrating pattern information corresponding to selective driving of the plurality of vibrators is received from the wireless receiving unit. According to the apparatus and method for notifying received information using vibrators and the system employing the same, various types of information can be expressed so that they can be recognized using a tactile sense by selectively driving the plurality of vibrators.