Welcome to the World of Hands on Science
“The Citizen Scientists League promotes responsible scientific observation, experimentation,
discovery, and invention. We encourage active participation, networking and publishing
by science enthusiasts at all levels of education and experience.”
The Arduino is an amazing platform for all kinds of projects, but when it comes to generating sound, many users struggle to get beyond simple beeps.
|Modified: 11/21/2012 14:28:46
© Ray Wisman
The Binary System
To better explain the bitwise operators, this tutorial will express most integer values using binary notation, also known as base two. In this system, all integer values use only the values 0 and 1 for each digit. This is how virtually all modern computers store data internally. Each 0 or 1 digit is called a bit, short for binary digit.
In the familiar decimal system (base ten), a number like 572 means 5*102 + 7*101 + 2*100. Likewise, in binary a number like 11010 means 1*24 + 1*23 + 0*22 + 1*21 + 0*20 = 16 + 8 + 2 = 26.
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Image Credit & Copyright: Babak Tafreshi (TWAN)
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
A service of: ASD at NASA / GSFC
& Michigan Tech. U.
Forever 15By JAMES ESTRIN and MERRILL D. OLIVER
Ilana Panich-Linsman still recalls being an awkward 15-year-old in western Massachusetts, leading a fairly innocent life with a few brainy friends.
Which may explain why one winter night eight years later, she stopped outside a Brooklyn pizza parlor and stared at three 15-year-old girls talking animatedly inside. They seemed much more self-confident than she had ever been at that age. Like a different species.