E-learning refers to the way people communicate and learn electronically which has only recently emerged as a key source of competitive advantage in the information society. With the development of the Information and Communication Technologies, E-Learning is argued to become a new and effective learning method and environment besides classroom based learning. Although still an emerging field, ...

A learning object (LO) is a grouping of instructional materials structured to meet a specified educational objective. Digital LOs, which can be stored electronically, allow a new approach to instructional activity, making medical education more efficient, and potentially more cost-effective. They are reusable and can incorporate text, graphics, animations, audio, and video to support and enhanc...

Electronically tunable RC-active ladder filter transfer fun& tions ore realized by employing the four quadrant analogue multiplier os the basic nonlinear network element. All the frequency dependent branches of a conventional RC-active ladder structure realizations ore simulated by means of impedance scaling networks. The scaling of these impedances allows the cutoff frequency of an elliptic lo...

A widely electronically tunable picosecond Ti:sapphire laser is demonstrated without any mechanical rotation or movement for the first time. With the second harmonics of the Nd:YAG laser as a pump source, the laser produces 10 ps pulses with a maximum output power of 350 mW. The wavelength of the self-starting ultrashort laser pulses can be rapidly and arbitrarily accessed in the region from 76...