Quantized Excitation Spectrum of the Classical Harmonic Oscillator in Zero-Point Radiation

We report that upon excitation by a single pulse, the classical harmonic oscillator immersed in classical electromagnetic zero-point radiation, as described by random electrodynamics, exhibits a quantized excitation spectrum in agreement to that of the quantum harmonic oscillator. This numerical result is interesting in view of the generally accepted idea that classical theories do not support quantized energy spectra.Comment: 5 pages, 3 figure

Dualism between Optical and Difference Parametric Amplification

Breaking the symmetry in a coupled wave system can result in unusual amplification behavior. In the case of difference parametric amplification the resonant pump frequency is equal to the difference, instead of the sum, frequency of the normal modes. We show that sign reversal in the symmetry relation of parametric coupling give rise to difference parametric amplification as a dual of optical parametric amplification. For optical systems, our result can potentially be used for efficient XUV amplification

An Exploratory Investigation of Internet Usage and Its Impacts in University Education

What impact does Internet usage have on university education? How effective is this impact? What are important antecedents for Internet usage in university education? Answers to these questions can help justify heavy investment from many universities in Internet infrastructures, as well as increase benefits of Internet usage in university education. Because Internet usage in university education is still at its early stage, many important questions such as those mentioned above have remained unanswered. This study intends to explore these issues by conducting a survey among university students. A research framework is proposed based on theories of TRA and TAM. The research findings provide some useful insights for university educators and Internet service providers (ISPs)

On the Assessment of CommercialWebsite - An Expert System Approach

The assessment of commercial website is about the evaluation of websites on the Internet for commercial usage. From an information system perspective, they can be assessed objectively or subjectively. From a business point of view, they can be assessed quantitatively or qualitatively. In this paper we propose an expert system approach to evaluate commercial website in both of these two aspects in order to gain a clear picture of their values