Bayesian analysis of fingerprint, face and signature evidences with automatic biometric systems

The Bayesian approach provides a unified and logical framework for the analysis of evidence and to provide results in the form of likelihood ratios (LR) from the forensic laboratory to court. In this contribution we want to clarify how the biometric scientist or laboratory can adapt their conventional biometric systems or technologies to work according to this Bayesian approach. Forensic systems providing their results in the form of LR will be assessed through Tippett plots, which give a clear representation of the LR-based performance both for targets (the suspect is the author/source of the test pattern) and non-targets. However, the computation procedures of the LR values, especially with biometric evidences, are still an open issue. Reliable estimation techniques showing good generalization properties for the estimation of the between- and within-source variabilities of the test pattern are required, as variance restriction techniques in the within-source density estimation to stand for the variability of the source with the course of time. Fingerprint, face and on-line signature recognition systems will be adapted to work according to this Bayesian approach showing both the likelihood ratios range in each application and the adequacy of these biometric techniques to the daily forensic work.     

Shakespeare,procreation, and progress

His books include The Economics of Population Growth; The Ultimate Resource; Theory of Population and Economic Growth: Effort, Opportunity and Wealth; The Economic Consequences of Immigration;and most recently Population Matters: People, Resources, Environment and Immigration,published by Transaction.     

The uneasy alliance of feminism and academia

The authors argue that some integrationists are seriously underestimating the degree to which the university is embedded in the overall social structure, a role which has not developed accidentally, and which is not likely to change without concurrent major changes in other institutions. Although it is understandable why integrationist strategies have developed and why some projects may be useful, it is also important to think about how they may undermine the radical goals of feminist scholarship and our ties to the community.     

The propensity of individuals to deposit DNA and secondary transfer of low level DNA from individuals to inert surfaces

We have shown that there is a difference between individuals in their tendency to deposit DNA on an item when it is touched. While a good DNA shedder may leave behind a full DNA profile immediately after hand washing, poor DNA shedders may only do so when their hands have not been washed for a period of 6h. We have also demonstrated that transfer of DNA from one individual (A) to another (B) and subsequently to an object is possible under specific laboratory conditions using the AMPFISTR SGM Plus multiplex at both 28 and 34 PCR cycles. This is a form of secondary transfer. If a 30 min or 1h delay was introduced before contact of individual B with the object then at 34 cycles a mixture of profiles from both individuals was recovered. We have also determined that the quantity and quality of DNA profiles recovered is dependent upon the particular individuals involved in the transfer process. The findings reported here are preliminary and further investigations are underway in order to further add to understanding of the issues of DNA transfer and persistence.     

The regulation of cognitive enhancement devices: refining Maslen et?al.'s model

Our (2014) model for the regulation of cognitive enhancement devices (CEDs) received a great deal of interest from those involved in European device regulation and from academic commentators. Further, since the publication of our recommendations, the number of manufacturers of brain stimulation devices for non-medical purposes has increased, underscoring the need for a regulatory response. In this paper, we clarify aspects of our original proposal and address additional regulatory issues beyond our original focus on the sale of devices. We begin with theoretical points pertaining to the definition of a CED and the distinction between treatment and enhancement. We then respond to practical challenges raised by the prospect of implementing our regulatory framework. Next, we address some wider societal considerations relating to users and other stakeholders. Finally, we revisit the broader regulatory context within which the various discussions are situated.     

The Effectiveness of Aid under Post-Conflict Conditions: A Sector-Specific Analysis

It is widely believed that foreign aid may help conflict-affected countries to recover after the termination of conflicts. However, the available empirical evidence supporting this view largely neglects the heterogeneous nature of aid. Drawing on the conflict database of the Uppsala Conflict Data Program, we address the hypothesis that the effectiveness of post-conflict aid differs between specific sectors. Our focus is on social and economic infrastructure which is most likely to suffer during conflict episodes so that the need for aid is particularly pressing in this area. We find fairly robust evidence that post-conflict aid is effective in improving social infrastructure. In contrast, aid appears to be ineffective in improving economic infrastructure.