Perfect lens makes a perfect trap

Negative refraction makes a perfect lens

With a conventional lens sharpness of the image is always limited by the wavelength of light. An unconventional alternative to a lens, a slab of negative refractive index material, has the power to focus all Fourier components of a 2D image, even those that do not propagate in a radiative manner. Such "superlenses" can be realized in the microwave band with current technology. Our simulations s...

How Practice Makes Perfect

Practice Makes Perfect

This paper presents an early empirical study on Extreme Programming practices[1] employing a qualitative action research method. The study was conducted on university students doing real commercial development projects to gain an insight into the problems faced by the new developers in adopting these agile practices. The second aim of the study is to investigate the effects of the XP practices ...

Practice makes perfect

In this paper I present the result from a study of how attitudes towards a course and the feeling of learning can change as the teaching style changes. In a traditional course with regard to style of teaching, the students use words such as difficult, comprehensive, confusing and boring when characterizing the course. In other courses with a different pedagogical approach students use words suc...

Practice makes perfect.

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