Does the Insanity Defence lead to an Abuse of Human Rights?

Every day convicted murderers, rapists, and other violent offenders are released by the prisons into the community. Most have not even completed their sentences, as they earned remittances for good behaviour. No one seems to worry that statistically many of these former prisoners remain dangerous, and will probably harm others sometime in the future. 1 In fact, there are criminologists who argue persuasively that fewer offenders should be imprisoned, for the good of their families and communities. This may reflect the confusion about what the actual purpose of imprisonment is, ranging from urges for retribution to achieving rehabilitation. Nevertheless, we are satisfied that when an offender ‘has repaid his debt to society’ he is free to re-enter ordinary life, albeit for a while under the sometimes wavering, watchful supervision of a parole officer

Non-Negative Matrix Factorization for Learning Alignment-Specific Models of Protein Evolution

Models of protein evolution currently come in two flavors: generalist and specialist. Generalist models (e.g. PAM, JTT, WAG) adopt a one-size-fits-all approach, where a single model is estimated from a number of different protein alignments. Specialist models (e.g. mtREV, rtREV, HIVbetween) can be estimated when a large quantity of data are available for a single organism or gene, and are intended for use on that organism or gene only. Unsurprisingly, specialist models outperform generalist models, but in most instances there simply are not enough data available to estimate them. We propose a method for estimating alignment-specific models of protein evolution in which the complexity of the model is adapted to suit the richness of the data. Our method uses non-negative matrix factorization (NNMF) to learn a set of basis matrices from a general dataset containing a large number of alignments of different proteins, thus capturing the dimensions of important variation. It then learns a set of weights that are specific to the organism or gene of interest and for which only a smaller dataset is available. Thus the alignment-specific model is obtained as a weighted sum of the basis matrices. Having been constrained to vary along only as many dimensions as the data justify, the model has far fewer parameters than would be required to estimate a specialist model. We show that our NNMF procedure produces models that outperform existing methods on all but one of 50 test alignments. The basis matrices we obtain confirm the expectation that amino acid properties tend to be conserved, and allow us to quantify, on specific alignments, how the strength of conservation varies across different properties. We also apply our new models to phylogeny inference and show that the resulting phylogenies are different from, and have improved likelihood over, those inferred under standard models

Multiple novel prostate cancer susceptibility signals identified by fine-mapping of known risk loci among Europeans

Genome-wide association studies (GWAS) have identified numerous common prostate cancer (PrCa) susceptibility loci. We have fine-mapped 64 GWAS regions known at the conclusion of the iCOGS study using large-scale genotyping and imputation in 25 723 PrCa cases and 26 274 controls of European ancestry. We detected evidence for multiple independent signals at 16 regions, 12 of which contained additional newly identified significant associations. A single signal comprising a spectrum of correlated variation was observed at 39 regions; 35 of which are now described by a novel more significantly associated lead SNP, while the originally reported variant remained as the lead SNP only in 4 regions. We also confirmed two association signals in Europeans that had been previously reported only in East-Asian GWAS. Based on statistical evidence and linkage disequilibrium (LD) structure, we have curated and narrowed down the list of the most likely candidate causal variants for each region. Functional annotation using data from ENCODE filtered for PrCa cell lines and eQTL analysis demonstrated significant enrichment for overlap with bio-features within this set. By incorporating the novel risk variants identified here alongside the refined data for existing association signals, we estimate that these loci now explain ∼38.9% of the familial relative risk of PrCa, an 8.9% improvement over the previously reported GWAS tag SNPs. This suggests that a significant fraction of the heritability of PrCa may have been hidden during the discovery phase of GWAS, in particular due to the presence of multiple independent signals within the same regio

Forensic telepsychiatry : a possible solution for South Africa?

Objective: South Africa has a shortage of facilities and psychiatrists to assess adjudicative competence of prisoners awaiting assessment under sections 77 to 79 of the Criminal Procedures Act of 1977. Various solutions have been proposed by the Department of Health. The recent linking of a Magistrate’s court and a prison by videoconferencing offers the opportunity to implement a forensic telepsychiatry service. The literature on forensic telepsychiatry for assessment of adjudicative competence was reviewed. Method: The electronic databases, PubMed, Scopus, Cinahl and Google Scholar were searched for papers on forensic telepsychiatry. The inclusion criterion was papers reporting the use of videoconferencing for assessment of adjudicative competence or for assessment for referral out of the judicial system, by psychiatrists or psychologists. Results: 411 papers were found of which 13, published between 1997 and 2008 were relevant. The use of videoconferencing for forensic psychiatric assessment was reported from four countries. The courts in those jurisdictions have accepted the use of videoconferencing for assessment and no successful appeals have been mounted on the basis of the use of videoconferencing for assessment. User satisfaction has not been reported for assessing adjudicative competence. Forensic telepsychiatry has been found to be cost effective, improve access to scarce specialist skills and reduce transport of prisoners under guard to hospitals or psychiatrists to prisons. Conclusion: There is nothing in the literature to suggest that a forensic telepsychiatry service is not feasible in South Africa and a pilot project is being planned