Rationality between the maximizers and the satisficers

It is argued that by explicating rationality in terms of benefits balancing or outweighing costs instead of in terms of maximizing or satisficing something, a more adequate view of rationality is obtained.I would like to thank Myles Brand, Hugh Lehman, Michael Martin, Ian Mitroff, Michael Ruse and Gordon Welty for their thoughtful comments and encouragement.     

Nonphysical Abuse Among Batterer Program Participants

Nonphysical abuse of women is receiving increased attention, but research with clinical samples of batterers has not substantially addressed the risk markers of nonphysical abuse. A multisite sample of batterer program participants (n = 840) with a longitudinal 15-month follow-up was used to identify risk markers. Logistic regressions were computed with batterer characteristics for 4 categories of nonphysical abuse (i.e., control, verbal, threats, combined) reported by the batterer's female partners during the follow-up. The only substantial and consistent risk markers were nonphysical and physical abuse prior to program intake and program dropout. The programs appear to help reduce the abuse. Other significant risk markers varied across the categories of nonphysical abuse, suggesting that the categories do not form a continuum or hierarchy of abuse. Recurrent abuse, moreover, continues to be more difficult to predict in clinical samples than in the general population.     

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.     

Voltammetric analysis of luminescent markers in gunshot residues

Currently, SEM-EDS is used to detect gunshot residue (GSR) from the presence of Ba, Pb, and Sb in the sample. However, the development of new nontoxic ammunition (NTA) has prevented conventional metals from being found. In this work, we aim to determine the presence of an inorganic luminescent chemical marker based on rare earth in gunshot residues using the technique of squarewave voltammetry (SWV). After firing, the luminescent complex [(Eu₂Zr)(btc)₃(Hbtc)_0.5.6H₂O], which is used as a chemical marker, can be detected under a UV lamp. An aqueous solution with 0.1 mol L⁻¹ KCl as supporting electrolyte can be easily collected on carbon paste electrode surfaces for SWV analysis A = 100 mV, f = 10 Hz, and step potential of 5 mV are required. The luminescent marker incorporated into the carbon paste electrode showed two anodic peak currents in the region of 0.4 V (vs Ag/AgCl) and at 0.75 V (vs Ag/AgCl) and also a cathodic one in 0.4 V (vs Ag/AgCl). SEM-EDS was able to analyze the same voltammetric results for conventional and nontoxic ammunition containing the luminescent marker. Therefore, voltammetry and SEM-EDS are valid for detecting the new residue marker in GSR. Despite this, the electrochemical method is still more advantageous because of its low cost and lack of expensive equipment and supplies in forensic laboratories.