Using spectral information in forensic imaging

Improved detection of forensic evidence by combining narrow band photographic images taken at a range of wavelengths is dependent on the substance of interest having a significantly different spectrum from the underlying substrate. While some natural substances such as blood have distinctive spectral features which are readily distinguished from common colorants, this is not true for visualization agents commonly used in forensic science. We now show that it is possible to select reagents with narrow spectral features that lead to increased visibility using digital cameras and computer image enhancement programs even if their coloration is much less intense to the unaided eye than traditional reagents. The concept is illustrated by visualising latent fingermarks on paper with the zinc complex of Ruhemann's Purple, cyanoacrylate-fumed fingerprints with Eu(tta)(3)(phen), and soil prints with 2,6-bis(benzimidazol-2-yl)-4-[4'-(dimethylamino)phenyl]pyridine [BBIDMAPP]. In each case background correction is performed at one or two wavelengths bracketing the narrow absorption or emission band of these compounds. However, compounds with sharp spectral features would also lead to improved detection using more advanced algorithms such as principal component analysis.     

Exsanguinated blood volume estimation using fractal analysis of digital images

The estimation of bloodstain volume using fractal analysis of digital images of passive blood stains is presented. Binary digital photos of bloodstains of known volumes (ranging from 1 to 7 mL), dispersed in a defined area, were subjected to image analysis using FracLac V. 2.0 for ImageJ. The box-counting method was used to generate a fractal dimension for each trial. A positive correlation between the generated fractal number and the volume of blood was found (R(2) = 0.99). Regression equations were produced to estimate the volume of blood in blind trials. An error rate ranging from 78% for 1 mL to 7% for 6 mL demonstrated that as the volume increases so does the accuracy of the volume estimation. This method used in the preliminary study proved that bloodstain patterns may be deconstructed into mathematical parameters, thus removing the subjective element inherent in other methods of volume estimation.     

Screening for intimate partner violence in orthopedic patients: a comparison of three screening tools

Accurately identifying victims of intimate partner violence (IPV) can be a challenge for clinicians and clinical researchers. Multiple instruments have been developed and validated to identify IPV in patients presenting to health care practitioners, including the Woman Abuse Screening Tool (WAST) and the Partner Violence Screen (PVS). The purpose of the current study is to determine if female patients attending an outpatient orthopaedic fracture clinic who screen positive for IPV using three direct questions (direct questioning) also screen positive on the WAST and PVS. We conducted a prevalence study at two Level I trauma centres to determine the prevalence of IPV in female patients presenting to orthopaedic fracture clinics for treatment of injuries. We used three methods to determine the prevalence of IPV; 1) direct questioning, 2) WAST, and 3) PVS. We compared the prevalence rates across the three screening tools. Ninety-four women screened positive for IPV using any method. The prevalence of IPV was 30.5% when a direct questioning approach was utilized, 12.4% using the WAST, and 9.2% using the PVS. The WAST identified 37.2% (35/94) of the IPV victims detected and the PVS identified 27.7% (53/94) of the IPV victims detected, whereas direct questioning identified 89.4% of the IPV victims. Identification of IPV may be under-estimated by the WAST and PVS screening tools. Our findings suggest direct questioning may increase the frequency of disclosure of IPV among women attending outpatient orthopaedic clinics.     

Is harmonization of legal rules an appropriate target? Lessons from the global financial crisis

This article deals critically with the call for a comprehensive harmonization of legal rules, against the background of the lessons from the recent financial crisis. Before coming to the topic of harmonization of legal rules, it first briefly deals with the question of why rules are necessary at all, and what the functions of rules are. Then it deals with the lessons from the recent financial crisis for the topic mentioned. The article conducts a kind of cost-benefit analysis of legal harmonization by looking at arguments in favor of and against uniform rules. It shows that not only the arguments in favor have increased after the recent financial crisis, but also the arguments against. It also shows that integration of global markets has not only increased the need for new uniform rules but also decreased the chances of their implementation; and that therefore today it is often better to improve the implementation of current rules instead of laying down new uniform rules.     

Game of Power Within the French Urban Landscape: A Socio-legal Semiotic Analysis of Communication,Vision and Space

This paper explores the role and impact of advertising in the French urban planning on citizens’ perception with a close examination of the implications and connections between citizens and outdoor advertising. Significant changes in quantity and form of outdoor advertising have been defined under French regulations. Our knowledge is now mass mediated in public spaces. More and more visible and gargantuan advertising signs surround and even invade our environment for strict commercial benefits. The ‘invasion’ of commercial signs can be compared to a visual pollution affecting our perception, autonomy in thinking and health depending on the part of the population being considered.     

From Maltreatment to Delinquency: Service Trajectories After a First Intervention of Child Protection Services

The relationship between maltreatment in childhood and delinquency in adolescence is recognized. However, the data available do not reveal what proportion of children under the supervision of child protection services (CPS) later transfer to youth legal services, nor the sequence of services provided by these two systems. This study sketches a preliminary portrait of Youth Criminal Justice Act (YCJA) incidence among Quebec children and adolescents as a consequence of a first crime after initial CPS case closure (N = 14,252). It quantifies the scope of the phenomenon and identifies the best predictors of YCJA incidence from among the administrative data available. Survival analysis revealed a 15.4% YCJA incidence for the entire cohort in the five and a half years following termination of initial intervention; boys between 12 and 17 years old when their initial CPS cases were closed were at the greatest risk (27.2%).     

A theory of entangled political economy, with application to TARP and NRA

The recent financial crisis has provoked a raft of contending claims as to whether the cause of the crisis is better attributed to market failure or political failure. Such claims are predicated on a presumption that markets and polities are meaningfully separate entities. To the contrary, we argue that contemporary arrangements create an entangled political economy that renders theorizing based on separation often misleading. Within this alternative framework of entangled political economy, we illuminate both the recent Troubled Assets Relief Program (TARP) and the New Deal??s National Recovery Administration (NRA).     

How important are interview methods and questionnaire designs in research on self-reported juvenile delinquency? An experimental comparison of Internet vs paper-and-pencil questionnaires and different definitions of the reference period

There has been relatively little change over recent decades in the methods used in research on self-reported delinquency. Face-to-face interviews and self-administered interviews in the classroom are still the predominant alternatives envisaged. New methods have been brought into the picture by recent computer technology, the Internet, and an increasing availability of computer equipment and Internet access in schools. In the autumn of 2004, a controlled experiment was conducted with 1,203 students in Lausanne (Switzerland), where “paper-and-pencil” questionnaires were compared with computer-assisted interviews through the Internet. The experiment included a test of two different definitions of the (same) reference period. After the introductory question (“Did you ever...”), students were asked how many times they had done it (or experienced it), if ever, “over the last 12 months” or “since the October 2003 vacation”. Few significant differences were found between the results obtained by the two methods and for the two definitions of the reference period, in the answers concerning victimisation, self-reported delinquency, drug use, failure to respond (missing data). Students were found to be more motivated to respond through the Internet, take less time for filling out the questionnaire, and were apparently more confident of privacy, while the school principals were less reluctant to allow classes to be interviewed through the Internet. The Internet method also involves considerable cost reductions, which is a critical advantage if self-reported delinquency surveys are to become a routinely applied method of evaluation, particularly so in countries with limited resources. On balance, the Internet may be instrumental in making research on self-reported delinquency far more feasible in situations where limited resources so far have prevented its implementation.