Eric Cai shares his love of statistics, machine learning, chemistry and math while teaching the concepts and writing readily usable code. Watch Eric's video tutorials on Youtube. Follow Eric on Twitter @chemstateric.
Cryptochromes and particularly the molecule flavin adenine dinucleotide (FAD) that forms part of the cryptochrome, are thought to be responsible for magnetoreception, the ability of some animals to navigate in Earth’s magnetic field. Joshua Beardmore et al. have developed a microscope that can detect the magnetic properties of FAD – some very cool work on radical pair chemistry!
I was very sad to learn of the deaths of John Nash and Alicia Lopez-Harrison de Lardé. Here is a nice obituary by Benjamin Morris, with examples of non-cooperative games and Nash equilibria from soccer, football, basketball and rock-paper-scissors.
Melanie Bailey leads a team of scientists in developing a fingerprint test for cocaine use. It “is based on surface mass spectrometry. It desorbs molecules from fingerprints and detects not only cocaine but also its two metabolites, benzoylecgonine and methylecgonine, showing that the drug has been ingested, rather than only touched”.
“We had proved that an assertion was indeed true in all of the difficult cases, but it turned out to be false in the simple case. We never bothered to check.” Are mistakes in academic mathematics being effectively identified and corrected? Vladimir Voevodsky (2002 Fields Medalist) published a major theorem in 1990, but Carlos Simpson found an error with the theorem in 1998. It wasn’t until 2013 that Voevodsky finally became convinced that his theorem was wrong. This motivated him to develop “proof assistants” – computer programs that help to prove mathematical theorems.
Contrary to a long-held presumption about the stability of DNA in mature cells, Huimei Yu et al. show that neurons use DNA methylation to rewrite their DNA throughout each day. This is done to adjust the brain to different activity levels as its function changes over time.