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Reliability PC: still room for improvement! Teachers

A recent analysis Gartner reported on the reliability of computer hardware, and finds that the failure rate decreases but the manufacturers still need to improve.

The analysis is based on the average annual rate of outages and found that during the last three years it has decreased by 25% for both desktop computers for laptops. The bad news is that this rate remains around 15 to 22%.

Figures refer to materials acquired in 2003-2004 and 2005-2006. They speak for themselves:

- for landline rate of failures in the first year from 7 to 5%, and 15 to 12% the fourth year;
- for notebooks, the failure rate is increased from 20 to 15% the first year, and 28 to 22% the third year.

Why do we see more failures on laptops?
Basically because the demand for machinery and small light causes a decrease in overall stiffness. In addition, compression of the components in a confined space causes a higher temperature can be harmful to electronic components. Finally, users carry their computer in hand, in transport, in terms of comfort variable, which exposes the material to various risks such as temprature, vibration, dust.

What components are most at risk?
For positions fixed, these are the motherboards and hard drives. The lip seal of motherboards are more frequent because of the increasing integration of components on a single card. Even modem or network interfaces are no longer independent and need, in case of failure, a replacement card complete database.

On laptops, the screen has long been the main source of failure. Over time, manufacturers are vastly improved equipment design, and the screens are not as sensitive as in the past. The causes of failures on these devices are, in descending order, motherboards and hard (as in fixed phones) but also the elements of chassis (including closing mechanisms, feet, hinges, housings), keyboards and monitors.

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cons phones: the battle continues classrooms

The "Chronicle of Higher Education" of June 2, 2006 ( http://chronicle.com - subscription required for some items) reported that teachers increasingly require that many students do over their laptops during class.

One reason is the development of networks without son, through which Students are distracted, some making their purchases online or chatting on instant messaging, instead of participating actively in class.

Professor of Law at the University of Memphis has drawn the ire of students to whom it had banned the use of laptops. His argument refers to the "video wall" that prevented visual contact with students, and penalizes the trade, including among the students themselves. But this case, exaggerated by the American newspapers, is far from unique, and other teachers are fighting against the use of phones that distract distractions to students online.

Some institutions have attempted to counter these difficulties by implementing technology solutions for the interruption of network connections during the course. Regarding radio links, this type of solution is very complex, and ultimately unreliable: it is to ensure that each wireless terminal is configured to cover a classroom without spilling over others, and to Professor permetttre to stop its operation as it turned out the light. Unfortunately, nothing prevents an external terminal to issue into the classroom.

For some, this type of approach amounts to "throwing the baby out with the bath water": the question is mainly to establish good practices, defining the place of the laptop in the course, and setting rules.

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Finally, there is nothing more than to lay down rules of conduct and politeness, that have nothing to do with the computer. Is it less legitimate for courts to ban the use of mobile phones for entertainment but to prohibit reading the newspaper?