I won’t use the P-word, because it pops up (as it were) way too much in the search stats.
Love Bugs: Sex in the Insect World
The sex of the Southern Green Stink Bug, however, is almost indistinguishable to the untrained eye.
Oh, but to the trained eye …
Central to banknote designs are Guilloche patterns, which can be created mechanically with a geometric lathe, or more likely these days, mathematically. The mathematical process attracted me immediately as I don’t have a geometric lathe and nor do I have anywhere to put one. I do, however, have a computer, and at the point I first started playing with the designs (mid-2004) Illustrator and Photoshop had gained the ability to be scripted.
via Kottke
When you detect a photon, you can say where, when, and with what frequency it arrived, but before the measurement, these parameters are undefined. The photon’s existence is embodied in a wave function, which gives the probability of measuring the photon at any time, place, and frequency. The wave function for a single photon is usually a “wave packet”–nearly zero everywhere except in a narrow range of space and time. But as long as you don’t detect the photon directly, you can manipulate its wave function into any complicated shape, in theory.
Because this fire needs more fuel.
Why Girls Leave Science And Math – Confidence, Says Psychologist
The study confirmed that old stereotypes die slowly. Both boys and girls perceived that teachers thought boys were stronger at math and science. For boys this represented a support, while for girls it acted as a barrier.
Top barriers for all age groups and disciplines were test anxiety and subject difficulty. But these differed between boys and girls. In addition, the genders formed their perceptions of math or science based on the barriers and supports, but they often arrived at different views.
Ultimately, it’s perception, more than reality, that affects the person’s academic and career choices, says Fouad.