kph is an abbreviation of the unit "kilometer per hour" and the one recommended by most news publishers, e.g. Reuters.
km/h is the unit symbol of the unit kph.
The symbol would probably have been more appropriate though and I definitely agree that everyone should get rid of non-SI units.
I wanted to update the page but they, understandably, do not except press reports. I can't find an independent source for the Cree results. Can you provide me with a source for the 150lm/W diodes? A datasheet maybe?
Also a clarification on the progress prize: to get it you need to have at least 1% improvement over the previous result. Considering that there is only 1.57% to go there is room for only one more progress prize until it hits the Grand Prize (10% improvement over the original results). Where did you get that? The rules (http://www.netflixprize.com/) state:
To qualify for a year's $50,000 Progress Prize the accuracy of any of your submitted predictions that year must be less than or equal to the accuracy value established by the judges the preceding year.
You just have to be better.
No. The rules state:
To qualify for the $1,000,000 Grand Prize, the accuracy of your submitted predictions on the qualifying set must be at least 10% better than the accuracy Cinematch can achieve on the same training data set at the start of the Contest.
The official contest site can be found on http://www.netflixprize.com/
Slashdot Mirror
kph is an abbreviation of the unit "kilometer per hour" and the one recommended by most news publishers, e.g. Reuters. km/h is the unit symbol of the unit kph. The symbol would probably have been more appropriate though and I definitely agree that everyone should get rid of non-SI units.
I wanted to update the page but they, understandably, do not except press reports. I can't find an independent source for the Cree results. Can you provide me with a source for the 150lm/W diodes? A datasheet maybe?
Cool. I stand corrected. Maybe update WP?
CFL and LED are very close in luminous efficacy. http://en.wikipedia.org/wiki/Luminous_efficacy
Pb is cheap, reliable, safe, doesn't need a complex battery management system and weight is not a big concern.
To qualify for a year's $50,000 Progress Prize the accuracy of any of your submitted predictions that year must be less than or equal to the accuracy value established by the judges the preceding year.
You just have to be better.
No. The rules state: To qualify for the $1,000,000 Grand Prize, the accuracy of your submitted predictions on the qualifying set must be at least 10% better than the accuracy Cinematch can achieve on the same training data set at the start of the Contest. The official contest site can be found on http://www.netflixprize.com/