By using an auto focus encoder, the present invention, positioning apparatus for hard disk servowriter, provides the precise positioning of the servo pattern writing heads required for successful servowriting. The new apparatus also relates to a track position sensor for providing track position of.....
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In conventional metallic waveguides, the transverse dimension of the waveguide determines the cut-off frequency for the transmission of electromagnetic (EM) waves. This means the larger the transverse dimension of the waveguide, the longer the wavelength of the guided waves. Hence, it may not be pra.....
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Schisandrin B is an extract from a Chinese medicine, which is well known of treating various cardiovascular diseases and many other conditions.The invention reveals the method of preparation of Schisandrin B, and how to use it in prevention and/or treatment of heart diseases or other related conditi.....
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Colorectal cancer (CRC) is one of the most common malignancies worldwide and the number of new CRC cases has been increasing rapidly since 1975. While 70% of CRC cases develop from sporadic adenomas or adenomatous polyps, early detection or surgical removal of polyps is believed to be one of the mos.....
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Tree structure plays an important role in topology. It appears in many designs in different areas such as data structure and computer networking etc. One of the implementations of tree topology is multi-tree forest. In the multi-tree forest, trees represent different categories and a single node in .....
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