Saturday, February 27, 2010
Friday, February 26, 2010
Saturday, February 20, 2010
Wednesday, February 17, 2010
Saturday, February 6, 2010
Posted Friday 5th February 2010 11:16 GMT
My point was that Linux inherits from UNIX lots of fundamental concepts that aren't really useful in a small embedded system. You're not going to have a hundred different users logged into a smartphone at the same time, and the hardware you need to handle doesn't really fit well into the simplistic open/close/read/write/ioctl driver interface model that worked fine for disks, tapes and terminals. If you designed an OS from scratch specifically for a smartphone, I don't think you'd end up with something that looked much like UNIX or Linux at all. Multitasking is of course a great thing to have on even the simplest embedded device, but you don't need Linux to do that. As for iPhone OS, since it's based on the Darwin kernel, I'm sure it does multitasking just fine - it must be an artificial restriction that stop apps doing it.
Yes! It was about time someone notices it.
Friday, February 5, 2010
Background The differential diagnosis of disorders of consciousness is challenging. The rate of misdiagnosis is approximately 40%, and new methods are required to complement bedside testing, particularly if the patient's capacity to show behavioral signs of awareness is diminished.
Methods At two major referral centers in Cambridge, United Kingdom, and Liege, Belgium, we performed a study involving 54 patients with disorders of consciousness. We used functional magnetic resonance imaging (MRI) to assess each patient's ability to generate willful, neuroanatomically specific, blood-oxygenation-level–dependentresponses during two established mental-imagery tasks. A technique was then developed to determine whether such tasks could be used to communicate yes-or-no answers to simple questions.
Results Of the 54 patients enrolled in the study, 5 were able to willfully modulate their brain activity. In three of these patients, additional bedside testing revealed some sign of awareness, but in the other two patients, no voluntary behavior could be detected by means of clinical assessment. One patient was able to use our technique to answer yes or no to questions during functional MRI; however, it remained impossible to establish any form of communication at the bedside.