Latent Fingerprint Visualization using a Scanning Kelvin Probe in Conjunction with Vacuum Metal Deposition

The application of vacuum metal deposition before scanning Kelvin probe visualization of fingerprints is investigated. The potential contrast between fingerprint ridges and furrows is maximized by the use of silver deposition for non‐noble metals and gold–zinc deposition for noble metals. The higher susceptibility of eccrine fingerprints to vacuum metal overdeposition is confirmed. Additionally, fingerprints are best developed individually and by building the metal deposition slowly to protect against overdevelopment and variation in the rate of metal condensation. The progress of the metal deposition can be monitored using the scanning Kelvin probe by reference to the change in potential and continuity of the new potential on the surface. The use of acetic acid solution for the recovery of overVMD‐developed samples is shown not to be useful. Applying the metal deposition has the additional prospect of increasing surface conductivity and homogeneity and both can aid fingerprint visualization using the scanning Kelvin probe.     

Why a Jury Trial is More Like a Movie Than a Novel

This essay is concerned to note the way in which successful trial advocacy seems to stem from the ability to convert legal discourse into a story form. These stories need to be ones with which a jury is familiar. These increasingly come from visual media, particularly film. It looks in detail at one trial where this process of relating a defence to the jury employed the structure of a Mafia film. The essay concludes by examining the reasons why the nature of the novel differs significantly from that of the film and how in the novel-to-film adaptation process a certain simplification is bound to occur.     

Communications

David Schlosberg, 'Communicative Action in Practice', Political studies (1995) XLIII, 291–311     

Direct PCR Improves the Recovery of DNA from Various Substrates

This study reports on the comparison of a standard extraction process with the direct PCR approach of processing low-level DNA swabs typical in forensic investigations. Varying concentrations of control DNA were deposited onto three commonly encountered substrates, brass, plastic, and glass, left to dry, and swabbed using premoistened DNA-free nylon FLOQswabs^™. Swabs (n = 90) were either processed using the DNA IQ^™ kit or, for direct PCR, swab fibers (~2 mm²) were added directly to the PCR with no prior extraction. A significant increase in the height of the alleles (p < 0.005) was observed when using the direct PCR approach over the extraction methodology when controlling for surface type and mass of DNA deposited. The findings indicate the potential use of direct PCR for increasing the PCR product obtained from low-template DNA samples in addition to minimizing contamination and saving resources.     

Crowdfunding industry—History,development, policies,and potential issues

Crowdfunding has gained a great deal of attention from policy makers, researchers, and practitioners. This paper attempts to provide an overview of the history and development of the industry and discusses different types of crowdfunding and their public policies. It is identified that the operation of peer‐to‐peer lending and equity‐based crowdfunding is regulated by the Financial Authority; the reward‐based crowdfunding (RBC) and donation‐based crowdfunding (DBC) is yet to be regulated, neither in the United Kingdom or United States. The lack of rules and regulations in the latter two models highlights the burning issues such as potential fraud and malpractice. Therefore, we suggest that it is timely to consider regulating the two types of crowdfunding possibly by governance mechanism with reporting requirements to keep track of the fund and to provide timely information. Additionally, it is advisable that practitioners to work on an agreed framework to establish industry standard, so potential investors can compare and assess the quality of projects easily. Finally, the management of crowdfunding platforms especially the RBC and DBC platforms should be improved. The ease of launching campaigns has made it difficult for both initiators and investors to succeed in the crowdfunding process. Further research to develop some form of assessment framework would be useful to both parties.