Comparison of two whole genome amplification methods for STR genotyping of LCN and degraded DNA samples

The analysis of LCN or highly degraded DNA samples presents a challenge for forensic science. Improving the quantity and/or quality of samples would greatly increase the profiling success rate from LCN and degraded samples. Whole genome amplification (WGA) is one method that has such potential. Two commercially available WGA kits, GenomePlex and GenomiPhi, were investigated for use on LCN and degraded DNA samples. Both kits amplified genomic DNA, producing microgram quantities from sub-nanogram templates. Profiling success of LCN DNA samples was increased, with improvements of over 700% from 10pg template DNA compared to non-WGA-amplified control samples. The amplification success with degraded DNA was also improved by WGA. Degraded DNA was simulated using restriction enzymes to demonstrate that the application of WGA can result in the typing of STR loci that could not previously be amplified. An increase in artefacts, such as stutter alleles and amplification biases, were observed in many samples. Results show that WGA is capable of increasing both the quality and quantity of DNA, and has the potential to improve profiling success from difficult samples in forensic casework.     

The prognostic value of the PCL-R in relation to the SUD treatment ending

Scientific research about patients with substance use disorders (SUD) treated within the context of forensic compulsory addiction treatment is seldom available. Scientifically supported surveys regarding the treatability of SUD patients are rare. Some authors claim that the Psychopathy-Checklist-Revised (PCL-R) has value for predicting therapeutic success. PCL-R scores rely on extensive interview data and a detailed review of criminal records and social history. The scores reflect 1) the affective and interpersonal psychological traits; and 2) socially deviant conduct. This study was conducted by the forensic professional clinic at the hospital for Psychiatry and Neurology Hildburghausen. We assessed 102 male patients using the PCL-R. This investigation evaluated the Total score of the PCL-R and the score of Factor 1 and Factor 2 in relation to the end of treatment by court order. The results showed significant differences between patients who completed treatment and those who did not. Patients that dropped out of treatment had a higher score in PCL-R. With the use of the PCL-R it is possible to make a quantitative statement about which patients will complete treatment.     

Objective paper structure comparison: Assessing comparison algorithms

More than just being a substrate, paper can also provide evidence for the provenance of documents. An earlier paper described a method to compare paper structure, based on the Fourier power spectra of light transmission images. Good results were obtained by using the 2D correlation of images derived from the power spectra as a similarity score, but the method was very computationally intensive. Different comparison algorithms are evaluated in this paper, using information theoretical criteria. An angular invariant algorithm turned out to be as effective as the original one but 4 orders of magnitude faster, making the use of much larger databases possible.     

Redefining Corporate Social Responsibility in an Era of Globalization and Regulatory Hardening

Globalization and the growth of multinational enterprises (MNEs) have been accompanied by an increasing call for corporations to take responsibility for their environmental and social impacts, and for greater corporate disclosure and transparency with regard to nonfinancial risks (collectively known as corporate social responsibility or CSR). At the same time, governments have increasingly turned to mandatory obligations for formerly voluntary CSR engagement, a trend we call the legalization of CSR. This article analyzes the “hardening” and legalization of CSR, and considers what this process tells us about norms and assumptions regarding the social responsibility of firms in the United States and around the world. Through our analysis of corporate trends, regulations, and case law from the United States, European Union, China, and India, we argue that the process of legalization and redefinition of CSR through a shareholder primacy lens may, troublingly, undermine the very notion of CSR. In the face of these trends, this article concludes with a redefinition of CSR that includes an express commitment to corporations’ social and ethical responsibility to society.     

Staff growth in international organizations: A principal-agent problem? An empirical analysis

The analysis covers 27 international organizations in the years 1950–2001. From the first to the last year, staff increased at a compound average rate of 3.2% per annum, while the number of member states rose by only 2.5%. The pooled analysis of 817 observations (including task proxies and organization dummies) reveals that (i) the elasticity of staff to membership is much larger than unity (1.36), (ii) United Nations organizations have significantly more staff, (iii) international organizations in the United States and Switzerland have significantly less staff, (iv) heterogeneity in terms of per capita income limits the size of an international organization and that (v) its staff is larger if its membership comprises many industrial or (former) communist countries. In a reduced sample, the financing share of the largest contributor in combination with the party or programmatic orientation of its government has a significantly negative effect on staff because the size of the largest financing share determines the incentive to monitor. U.S. exit from an international organization reduces its staff significantly. Most of these results depend on the condition that the non-stationary component of staff size is not taken account of by time dummies or trends.     

Beware of the possibility of fingerprinting techniques transferring DNA

Fingerprinting brushes have the potential to collect and transfer DNA during powdering. Squirrel-hair fingerprint brushes exposed to specific sets of saliva stains and brushes used in routine casework were tested for their ability to collect and transfer DNA containing material using standard DNA extraction procedures and AmpFlSTR Profiler Plus amplification and typing procedures. The tests found that the risk of transferring DNA during powdering and having a detrimental impact on the analysis increases if the examiner powders over either biological stains (such as blood or saliva) or very fresh prints and uses more sensitive PCR amplification and typing procedures. We advocate caution when powdering prints from which DNA may also be collected and provide options for consideration to limit the risk of transferred DNA contamination while fingerprinting.     

Hypoglycemic brain damage

Hypoglycemia was long considered to kill neurons by depriving them of glucose. We now know that hypoglycemia kills neurons actively from without, rather than by starvation from within. Hypoglycemia only causes neuronal death when the EEG becomes flat. This usually occurs after glucose levels have fallen below 1 mM (18 mg/dl) for some period, depending on body glycogen reserves. At the time that abrupt brain energy failure occurs, the excitatory amino acid aspartate is massively released into the limited brain extracellular space and floods the excitatory amino acid receptors located on neuronal dendrites. Calcium fluxes occur and membrane breaks in the cell lead rapidly to neuronal necrosis. Significant neuronal necrosis occurs after 30 min of electrocerebral silence. Other neurochemical changes include energy depletion to roughly 25% of control, phospholipase and other enzyme activation, tissue alkalosis and a tendency for all cellular redox systems to shift towards oxidation. The neurochemistry of hypoglycemia thus differs markedly from ischemia. Hypoglycemia often differs from ischemia in its neuropathologic distribution, a phenomenon applicable in forensic practice. The border-zone distribution of global ischemia is not seen, necrosis of the dentate gyrus of the hippocampus can occur and a predilection for the superficial layers of the cortex is sometimes seen. Cerebellum and brainstem are universally spared in hypoglycemic brain damage. Hypoglycemia constitutes a unique metabolic brain insult.