conclusions the study results are indicative of the impact of electromagnetic fields on computer users’ health, and it is thus advisable to avoid leaving computers switched on unnecessarily in addition to observing the minimum distance of 60 cm from computer monitors to control the adverse effects of electromagnetic fields. materials and methods electric and magnetic field intensities were meas...

Currently, International Space Station (ISS) crews use a laptop computer to display procedures for performing onboard maintenance tasks. This approach has been determined to be suboptimal. A heuristic evaluation and two studies have been completed to test commercial off-the-shelf (COTS) “near-eye” heads up displays (HUDs) for support of these types of maintenance tasks. In both studies, subject...

Usability testing is a keystone activity for user-centered design. Although user centered design has been studied and practiced in the literature on adult computer products, the works on addressing the need to include the user in the design of children’s computer products is still limited. Recently, low cost mobile platforms have been developed for basic education and released into the market. ...

Squeak Etoys is a free software program and media-rich authoring system with a user-friendly visual interface. The software is designed to help six to twelve year-old students learn through interaction and collaboration, and comes preinstalled on XO laptop computers. The goal of the One Laptop Per Child initiative is to create novel educational opportunities for the world’s children by providin...

Laptap is a laptop-based, real-time sound synthesis/control system for music and multimedia performance. The system produces unique sounds by positive audio feedback between the on-board microphone and the speaker of a laptop computer. Users can make a variety of sounds by touching the laptop computer in several different ways, and control their timbre with the gestures of the other hand above ...

The purpose of the thesis is to conceptualize an application method of ground-based reconfigurable FPGA (Field Programmable Gate Array) technologies for space systems and to apply the method to the on-board computer of the small satellite Flying Laptop for the on-orbit demonstration. The Flying Laptop satellite is the first small satellite within the “Stuttgart small satellite program” in which...

This paper describes incorporation of a piezoelectric transformer into a laptop computer adaptor in order to miniaturize the size and improve the energy utilization. Conventionally, electromagnetic transformer is used in the adaptor for generating the 45W output power. In this study, we show that a multilayer piezoelectric transformer rated 30W output power can satisfy the laptop specifications...

Rapid advances in technology have resulted in laptop (mobile) computers with performance and features comparable to desktop (stationary) machines. Advances in rechargeable battery technology have failed to keep pace, decreasing the usefulness of mobile computers and portable wireless devices. Several methods of power management can be used to prolong the battery life of a mobile computer. We pr...