The purpose of this study is two-fold. Firstly, it is to examine the perceived effectiveness of using portfolio in the Internet environment. Secondly, it is to explore students' opinions about online English materials and learning experiences. For the purpose, a questionnaire survey complemented with qualitative interviews was conducted. The participants were 211 university students taking the general English courses as a requirement for graduation. The findings show that unlike the expectation, use of portfolio in the internet environment is not effective to teach the general English courses. It has been also found that the students are not satisfied with such courses due to the failure to provide the necessary condition for an effective use of portfolio in the language classes. Based on the findings, the study argues that for the use of portfolio in the internet environment to be effective, it must be practiced in the right condition. Some pedagogical implications are provided on how to incorporate the internet into college EFL classes.

The electromagnetic wave (EM) absorption properties of various particle size have been investigated in a sheet-type absorber using the alloy powder. With decreasing the average particle size, the complex permeability () and permittivity () increased and the matching frequency is shifted toward lower frequency. The fabricated EM wave absorbers showed permeability , permittivity for a mesh sample, and the calculated power absorption was as high as 80% in the frequency range over 2 GHz.