Jessica Fridrich
Jessica Fridrich (* 1964 in Czechoslovakia ) is a Czech mathematician and the inventor of the most widely used method to quickly solve the Rubik's Cube , better known as speedcubing .
Life
In 1987 Fridrich obtained an MA in applied mathematics from the Czech Technical University in Prague . Your Ph.D. in Systems Science from Binghamton University in 1995. From 1996 to 2002 her research was supported by the US Air Force with a total of 1.3 million US dollars and resulted in five US and international patents.
At the second Rubik's Cube World Championship in Toronto in 2003 , she finished second after Dan Knights. In the speed cubing community she is regarded as a pioneer of speed cubing alongside Lars Petrus . The methods of almost all speedcubers in the world rankings are based on theirs.
The Fridrich method describes the solution of the cube by "F2L" (first two layers), ie dissolving the first two layers at the same time, in contrast to the " layer by layer " method ( LBL ) (layer by layer). The first step ("cross") is based on a cross on the first level to the central stone on the adjacent sides. The corner stones of the first level and their neighboring curb stones of the second level are then simultaneously placed in their correct position. Therefore, after aligning the cross and the corner / edge pairs, two of the three cube levels have already been solved. The last level is solved first through orientation and then through permutation of the stones. A total of 78 algorithms are required (57 for the orientation, 21 for the permutation), of which only the two are used depending on the case.
Jessica Fridrich works as a professor at the Department of Electrical and Computer Engineering at Binghamton University and specializes in digital watermarks , steganography and digital image forensics and image analysis as well as non-linear chaotic systems with applications in cryptography and non-linear modeling, for example with fractals .
Patents (selection)
- 7,239,717 Lossless embedding of data in digital objects, 2007
- 7,006,656 Lossless embedding of data in digital objects, 2006
- 6,831,991 Reliable detection of LSB steganography in color and grayscale images, 2004
Web links
- Jessica Fridrich's website (English)
- Fridrichs competition results (English)
Individual evidence
- ↑ http://www.km.fjfi.cvut.cz/main/?loc=grad&page=info&rok=1987
- ↑ Biography at Hindawi Publishing Corporation about Jessica Fridrich
- ↑ worldcubeassociation.org: Results at Rubik's Cube, Final, Average of 5
| personal data | |
|---|---|
| SURNAME | Fridrich, Jessica |
| BRIEF DESCRIPTION | Czech mathematician |
| DATE OF BIRTH | 1964 |
| PLACE OF BIRTH | Czechoslovakia |