"The material was discovered when a team of Harvard University scientists shone an ultra-powerful laser (briefly producing the same amount of energy as the sun falling on the entire surface of the Earth) on a silicon wafer, before adding sulphur hexafluoride. The result was a silicon wafer that looked black to the naked eye, but when examined under an electron microscope turned out to be covered with a massive amount of ultra-tiny spikes.
The substance has since been found to be incredibly sensitive to light, leading to a range of exciting plans for commercialization, including night-vision and infra-red imaging systems. According to James Carey, co-founder of Harvard spin-off company SiOnyx, â€œWe have seen a 100 to 500 times increase in sensitivity to light compared to conventional silicon detectors.â€"
"Woefully underappreciated, however, is the reality that each of these precious commodities might soon cripple our use of the other. We consume massive quantities of water to generate energy, and we consume massive quantities of energy to deliver clean water. Many people are concerned about the perils of peak oilâ€”running out of cheap oil. A few are voicing concerns about peak water. But almost no one is addressing the tension between the two: water restrictions are hampering solutions for generating more energy, and energy problems, particularly rising prices, are curtailing efforts to supply more clean water."
"Is this a sign that GTD is failing its users or is it their own application that is the problem? â€œYou canâ€™t prescribe the system,â€ Allen says. â€œPeople have to develop it themselves to some extent.â€ Allen maintains that GTD solved a problem most time-stretched workers didnâ€™t know they had: they needed to get a clear space inside their head."
"The usual statistical technique used to compare the means of two groups is a confidence interval or significance test based on the t distribution. For this we must assume that the data are samples from normal distributions with the same variance. Table"
"Approach number one involves tackling the biggest tasks first and getting them out of the way. The idea is that by tackling them first you deal with the pressure and anxiety that builds up and prevents you from getting anything doneâ€”whether weâ€™re talking about big or small tasks. Leo Babauta is a proponent of this method.
Approach number two involves tackling the tasks you can get done quickly and easily, with minimal effort. Proponents of this method believe that by tackling the small fries first, youâ€™ll have less noise distracting you from the periphery of your consciousness."