Deep learning for sex determination: Analyzing over 200,000 panoramic radiographs

The objective of this study is to assess the performance of an innovative AI-powered tool for sex determination using panoramic radiographs (PR) and to explore factors affecting the performance of the convolutional neural network (CNN). The study involved 207,946 panoramic dental X-rays and their corresponding reports from 15 clinical centers in São Paulo, Brazil. The PRs were acquired with four different devices, and 58% of the patients were female. Data preprocessing included anonymizing the exams, extracting pertinent information from the reports, such as sex, age, type of dentition, and number of missing teeth, and organizing the data into a PostgreSQL database. Two neural network architectures, a standard CNN and a ResNet, were utilized for sex classification, with both undergoing hyperparameter tuning and cross-validation to ensure optimal performance. The CNN model achieved 95.02% accuracy in sex estimation, with image resolution being a significant influencing factor. The ResNet model attained over 86% accuracy in subjects older than 6 years and over 96% in those over 16 years. The algorithm performed better on female images, and the area under the curve (AUC) exceeded 96% for most age groups, except the youngest. Accuracy values were also assessed for different dentition types (deciduous, mixed, and permanent) and missing teeth. This study demonstrates the effectiveness of an AI-driven tool for sex determination using PR and emphasizes the role of image resolution, age, and sex in determining the algorithm's performance.     

Assessment of post-mortem submersion interval using total aquatic decomposition scores of drowned human cadavers

Investigating drowning-related deaths remains a significant problem for forensic personnel all over the world. The previously published decomposition scoring method like the total aquatic decomposition (TAD) score promises to estimate the correct post-mortem submersion interval (PMSI) in aquatic habitats through the assessment and calculation of the decomposition rate and accumulated degree days (ADD). The current study comprised of 53 drowned death cases belonging to various districts of Haryana from May 2016 to August 2017. The regression and Pearson's correlation indicated a significant correlation between the TAD scores and the actual ADD (calculated through water temperatures) (r² = 0.917) and between the actual and the estimated ADDs (calculated through TAD scores used by Heaton et al. [21]) (r = 0.9585). The results indicated that the estimated ADD tends to over predict the PMSI compared to the actual ADD. It is further confirmed by paired t-test, which showed the mean of actual ADD (mean = 349) to be significantly lower than the mean of estimated ADD (mean = 663). Moreover, these methods will help forensic investigators and researchers formulate region-specific regression equations for PMSI estimation.     

Short-term effects of restorative justice conferences on post-traumatic stress symptoms among robbery and burglary victims: a randomized controlled trial

Objectives

To examine the impact of face-to-face restorative justice conference (RJC) meetings led by police officers between crime victims and their offenders on victims’ post-traumatic stress symptoms.

Methods

Two trials conducted in London randomly assigned burglary or robbery cases with consenting victims and offenders to either a face-to-face restorative justice conference (RJC) in addition to conventional justice treatment or conventional treatment without a RJC. Post-traumatic stress symptoms (PTSS) were measured with the Impact of Event Scale-Revised (IES-R) within 1 month of treatment for 192 victims. We assessed the prevalence and severity of PTSS scores following treatment, using independent sample t tests and chi square statistics. We further measured the magnitude of the differences between the groups, using effect size analyses.

Results

Analyses show that PTSS scores are significantly lower among victims assigned to RJC in addition to criminal justice processing through the courts than to customary criminal justice processing alone. There are overall 49 % fewer victims with clinical levels of PTSS, and possible PTSD (IES-R?≥?25). Main treatment effects are significant (t?=?2.069; p?Conclusions Findings suggest that restorative justice conferences reduce clinical levels of PTSS and possibly PTSD in a short-term follow-up assessment. Future research should include longer follow-up, larger and more stratified samples, and financial data to account for the cost benefit implications of RJ conferences compared to ordinary PTSS treatments.     

An innovative method for human height estimation combining video images and 3D laser scanning

Digitalization has increased the number of video surveillance systems that sometimes capture crime images. Traditional methods of human height estimation use projective geometry. However, sometimes they cannot be used because the video camera surveillance system is not available or has been moved and there are no reference lines on the frame. Scientific studies have developed a new method for human height estimation using 3D laser scanning. This model necessarily requires a series of approximations, which increase the final measurement error. To overcome this problem, in the present study, images of a subject are projected directly on the 3D model, estimating the height of the subject. This article describes the methodological approach adopted through the analysis of a real case study in a controlled environment executed by Carabinieri Forensic Investigation Department (Italy). The aim is to obtain a human anthropometric measure derived from frames extracted from the videos associated with the digital survey of the framed area obtained with 3D laser scanning and point cloud analysis. The result is the height estimation of five subjects filmed by a camera obtained through the combination of 2D images extracted by a DVR/surveillance systems with 3D laser scanning. Results show that most estimated measurements are less than the real measurement of the subject; it also depends on the posture of the subject while walking. Furthermore, results shows the differences between the real height and the estimated height with a statistical approach.     

Procedural justice and police legitimacy: a systematic review of the research evidence

Objectives

We undertook a systematic review and meta-analysis to synthesize the published and unpublished empirical evidence on the impact of police-led interventions that use procedurally just dialogue focused on improving citizen perceptions of police legitimacy.

Methods

The systematic search included any public police intervention where there was a statement that the intervention involved police dialogue with citizens that either was aimed explicitly at improving police legitimacy, or used at least one core ingredient of procedural justice dialogue: police encouraging citizen participation, remaining neutral in their decision making, conveying trustworthy motives, or demonstrating dignity and respect throughout interactions. The studies included in our meta-analyses also had to include at least one direct outcome that measured legitimacy or procedural justice, or one outcome that is common in the legitimacy extant literature: citizen compliance, cooperation, confidence or satisfaction with police. We conducted separate meta-analyses, using random effects models, for each outcome.

Results

For every single one of our outcome measures, the effect of legitimacy policing was in a positive direction, and, for all but the legitimacy outcome, statistically significant. Notwithstanding the variability in the mode in which legitimacy policing is delivered (i.e., the study intervention) and the complexities around measurement of legitimacy outcomes, our review shows that the dialogue component of front-line police-led interventions is an important vehicle for promoting citizen satisfaction, confidence, compliance and cooperation with the police, and for enhancing perceptions of procedural justice.

Conclusions

In practical terms, our research shows the benefits of police using dialogue that adopts at least one of the principles of procedural justice as a component part of any type of police intervention, whether as part of routine police activity or as part of a defined police crime control program. Our review provides evidence that legitimacy policing is an important precursor for improving the capacity of policing to prevent and control crime.     

The economic impact of genetically modified cotton on South African smallholders: Yield,profit and health effects

Results of a large-scale survey of resource-poor smallholder cotton farmers in South Africa over three years conclusively show that adopters of Bt cotton have benefited in terms of higher yields, lower pesticide use, less labour for pesticide application and substantially higher gross margins per hectare. These benefits were clearly related to the technology, and not to preferential adoption by farmers who were already highly efficient. The smallest producers are shown to have benefited from adoption of the Bt variety as much as, if not more than, larger producers. Moreover, evidence from hospital records suggests a link between declining pesticide poisonings and adoption of the Bt variety.     

Civic Engagement in the Era of Big Stories

Most scholars agree that news coverage of politics is the product of complicated interaction between journalists and politicians. Yet, we know little about how the interaction affects the coverage. Our analysis examines U.S. senators' press events and subsequent national network coverage from 1980–1996. Our evidence suggests that all senators can increase journalists' interest in their press events by carefully choosing the type of event and which politicians attend. In turn, such interest often translates into actual news stories, although that coverage is not guaranteed. Thus, senators can structure press events in order to increase the likelihood of coverage, but reporters understandably resist their attempts to do so. As a result, the most newsworthy press events require senators to give up control over content, creating more potential for revealing unexpected information.     

Assessing Americans' Opinions About the News Media's Fairness in 1996 and 1998

This article reports an analysis of Americans' opinions about the news media's fairness in covering public affairs. The data come from the 1996 and 1998 National Election Studies, which contained variables tapping exposure to and opinions about the news media, as well as key political dispositions?partisanship, ideology, and opinion about presidential and congressional job performance?and a plethora of demographic variables. The data show that people who adhere to traditional moral codes and are misanthropic tend not to trust the news media to cover politics fairly. In a presidential election year, opinion about the president's job performance affects perceptions of the press's fairness. In an off-year election, however, opinion about the president's job performance is replaced by opinion about how the Congress has been doing its job. In addition, perception of how the media covered the Lewinsky scandal also influenced opinion about the press's fairness in general.     

Criminal Case Outcomes, Incarceration, and Subsequent Intimate Partner Violence

Given the centrality of court interventions to the U.S. response to intimate partner violence (IPV), it is crucial to evaluate their impact on reabuse. To do so, this study examined whether female IPV victims’ experiences of abuse in the year following a criminal court case against their partner varied by case outcome or by whether the batterer had or had not been incarcerated. Consistent with prior research, we found no main effect differences in reabuse trajectories by court case outcome or by incarceration. We also examined variables that might moderate the impact of case outcome and incarceration on reabuse and found that although batterer legal history did not affect the impact of case outcome, his age, Time 1 employment status, the couple’s Time 1 living arrangement, and duration of abuse did interact with case outcome. No variables tested moderated the relationship between incarceration and reabuse over time. Findings suggest that in certain cases there may be benefits to case outcomes that leave potential consequences hanging over the offender’s head. These results also add to the growing body of evidence questioning the efficacy of one-size-fits-all approaches to IPV cases.