摘要:
Disclosed is a micro actuator and an ink jet printer head manufactured using the same. The micro actuator comprises a substrate having a space part which is integrally defined in the substrate and is opened only at a lower end thereof; a first piezoelectric element formed on the substrate in a first area which is arranged above the space part and actuated when voltage is applied thereto; a second piezoelectric element formed on the substrate in a second area which is not arranged above the space part and not actuated even when voltage is applied thereto; and an upper electrode formed on the first piezoelectric element; whereby rigidity of an entire structure is elevated and panel vibration is reduced, by the second piezoelectric element.
摘要:
There is provided a rapid and reliable method of fabricating a three-dimensional organic/inorganic nanostructure of a well-arranged shape wherein tubes or fibers of several nanometer to several micrometer size have horizontal and vertical orientations. The method of the present invention comprises the following steps: A) forming a tube- or fiber-type structure of an organic or inorganic nanometer/micrometer size by an interfacial polymerization method or interfacial reaction method; and B) obtaining the organic/inorganic composite three-dimensional nanostructure.
摘要:
A 1,2,4-triazole derivative of formula 1 or a non-toxic salt thereof, a preparation method thereof, and a pharmaceutical composition containing the derivative or the salt as an active ingredient are provided.
摘要:
Disclosed is polyetherpolyol for use in production of polyurethane, characterized in that polyetherpolyol carbons have stereoregularity of syndiotactic triad. Further, a method of preparing such polyetherpolyol is provided. Therefore, polyurethane resulting from stereoregular polyetherpolyol is superior in physical properties to polyuretanes obtained by use of atactic polyetherpolyol.
摘要:
Provided is an apparatus for modulation in a base station with a smart antenna. The smart antenna system has many advantages that it is possible to deal with the large volume of subscribers; communication quality is increased; etc. However, the smart antenna system has disadvantages that cost is increased due to many antennas; base station transceivers have a complicated structure due to multiple antennas per base station; it is too complicated to manage resource and channel allocation; there is required compatibility with a conventional system; etc. The present invention provides an apparatus for modulation in a base station with a smart antenna, which can solve the foregoing problems by employing a modulator using a time division multiplexing method, a sector beam selector, and a TX beam former, thereby providing good compatibility regardless of a change in the number of base station sectors and the number of antennas.