Anniversaries and half-lives

Nuclear Binding and Half-Lives

Nuclear Forces. Protons give the nucleus of an atom a net positive charge. So, why doesn’t the nucleus explode? Nuclear stability is possible because the particles in the nucleus are each tiny magnets, and magnets can be arranged to attract one another. When the particles inside the nucleus have specific locations, the forces from electrical charge can be in balance with the magnetic forces fro...

Anniversaries and attitudes.

Anniversaries and Issues

Background: Medicine usage in Parkinson's disease patients is often imperfect, in particular irregular timing of medication. The effect of informing Parkinson's disease patients about the continuous dopaminergic hypothesis (to encourage regular medicine intake) on medication adherence and motor control was tested. Methods: Patients were randomised either to the active group (receiving the inter...

Half-Lives of EigenFlows for Spectral Clustering

Using a Markov chain perspective of spectral clustering we present an algorithm to automatically find the number of stable clusters in a dataset. The Markov chain’s behaviour is characterized by the spectral properties of the matrix of transition probabilities, from which we derive eigenflows along with their halflives. An eigenflow describes the flow of probability mass due to the Markov chain...

Half a gram – a thousand lives

The article presents information on the latest drug policy change in the Russian Criminal Code: a decrease of the drug threshold amounts for which possession can lead to a criminal liability. Also, the article presents an assessment of the 2003-2004 liberal revisions in the Criminal Code, and an analysis of the background/premise for the 2006 counter-reform. The author examines the new criteria...