Volume 7 Issue 1 - December 19, 2008
Articles Digest

Research Express@NCKU Dec. 19 ~ Dec. 25, 2008

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High frequency and low frequency noise of AlGaN/GaN metal-oxide-semiconductor high-electron mobility transistors with gate insulator grown using photoelectrochemical oxidation method
Ching-Ting Lee

Recently, GaN-based semiconductors are widely used in electronic evices and optoelectronic devices owing to their high-electron mobility, wide and direct energy bandgap, better thermal and chemical stability. Metal-semiconductor field-effect transistors and metal-semiconductor high-electron mobility field-effect transistors using Schottky gate have been used in high-frequency applications ...

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Two-dimensional grating structure induced by light-field of single laser beam in a dye-doped cholesteric liquid crystal film
Chia-Rong Lee

Generally, a planar cholesteric liquid crystal (CLC) can be formed by adding chiral material into the nematic liquid crystal within a cell with homogeneous surface alignment. The CLC has a structure with a spatially-periodic rotation of the LC director along the normal of the cell. The distance for which the director rotates 360 degree is called the pitch(P0) of the CLC. ...

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VLAN-based Secure Group Communication over Wireless Ad Hoc Networks
Yueh-Min Huang

In recent years, our lives have been profoundly affected by mobile devices such as PDAs and notebooks, resulting in the trend of using Mobile ad hoc network (MANET) as the networking system with respect to station-based conventional wirelesses system by taking the advantage of featuring mobility to form dynamic groups on demand. Data packets can be broadcasted and received by all nodes within ...

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QUADRATIC DISTANCES ON PROBABILITIES: A UNIFIED FOUNDATION
SHU-CHUAN CHEN

Quadratic form distance measures have been widely used in assessing the goodness of fit of the models. There are many important reasons that why the quadratic distances play a central role to the study of the goodness of fit. For example, a number of classically important distances, such as Pearson’s chi square or Cramér–von Mises, are quadratic distances. Other more recent examples can be found ...

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Reviewer Stances and Writer Perceptions in EFL Peer Review Training
Hui-Tzu Min

Research on ESL/EFL peer review training is burgeoning. Yet one dimension ESL/EFL peer response/review training studies failed to compare before and after training is changes in respondent/ reviewer stance, defined as the roles that readers adopt toward the text and the writer.  Readers’ stances are important because they can impact the nature of reader-writer interaction, which, in turn, affects ...

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