Development of etching paste for serial number restoration on aluminum engine block

Engine numbers, which involve information regarding the engine type, production number, and year and place of manufacture, are used for identification purposes. Comprising of unique alphanumeric characters, the engine numbers are fully or partially obliterated especially in auto theft and smuggling cases to conceal the origin, identity, and owner of vehicles. The limitations of the current restoration techniques such as the difficulty of using chemical liquid etching in vertical sites, the restrictions of magnetic and optical methods, and the applicability of several techniques like electron backscatter diffraction only in the laboratory environment prompt the development of new techniques. In view of these limitations and the importance of restoring engine numbers in criminal investigations, this unique study aimed to develop an etching paste that would restore the effaced characters on a real aluminum alloy engine block. The characters which were cold-stamped on the engine block were milled at varying depths and restoration attempts were conducted using etching pastes formed with different chemicals and materials. The analyses indicate that the etching paste formed with 200 mg of perlite, 400 mg of iron powder, and 450 μL of 20 M NaOH provided restoration to a good extent. The prevention of over-etching through the controlling of the chemical reaction and the cost-effectiveness appears to be the advantages of this technique. The success of recovery on the real engine block, the facilitation of restoration on curved surfaces, and the chance of on-site usage will likely make the etching paste a widely used tool in serial number restoration.     

Piercing the surface: A mechanical analysis of stabbing with household tools

Estimating the applied power during a stabbing incident, or estimating the minimal force necessary to penetrate the body with a certain weapon is a challenging task in forensic practice. A thorough forensic evaluation of stabbing forces needs objective numerical experimental data. Stabbing tests of 12 different weapons – including knives, a pair of scissors, a fork, screwdrivers, a rasp, a corkscrew, and a utility knife blade – were performed with a Mecmesin MultiTest-dV material tester on pork loin and ballistic gel to estimate the stabbing forces and dynamics. Penetration force (F_p) and maximal force (F_max) were recorded, and the registered force curves were analyzed. F_max was 159.8–212.07 Newton (N), 30.56–30.58 N, 168.9–185.48 N for various knives; 171.39–190.43 N for the pair of scissors, 233.6 N for the fork; 532.65–562.65 N, 370.31–367.19 N and 314.51–432.89 N for various screwdrivers, 44.14–56.62 N for utility knife during pork loin stabbing. The butter knife, corkscrew and rasp were not able to penetrate the pork loin, and the curved fork bent during stabbing. The results prove that weapon characteristics greatly influence the force necessary for penetration. Maximal stabbing force depends mostly on tip sharpness, and the force sharply decreases after penetration occurs, which indicates that edge sharpness is not as important as tip characteristics during stabbing perpendicular to skin surface. The penetration force during stabbing with a pair of scissors is comparable to the penetration force of knives. Stabbing with screwdrivers generally needs larger force than average knives but depends greatly on screwdriver size.     

Epistemic emotions in prosecutorial decision making

The article examines epistemic emotions as part of the emotive-cognitive processes of prosecutors’ knowledge seeking and decision making in preliminary investigation and court proceedings. Drawing on ethnographic fieldwork, interviews, and shadowing of prosecutors in Sweden, we show how emotions motivate and orient prosecutors’ inquiries and the fundamental role of the ‘certainty–doubt spiral’ for ‘doing objectivity’. In conclusion, we discuss the centrality of emotions for conscientious and well-considered decisions in legal work. The study contributes to the field of law and emotion by exploring the epistemic quality of emotions, notably the certainty–doubt spiral, in legal work.     

Leadership Experiences Within Civil Organizations and Candidacy in Public Elections: Causal Evidence from a Quasi-Experimental Approach

Standing as a candidate in public elections has been characterized as the ultimate act of political participation. We test the hypothesis that acquiring office within civil organizations increases the probability of becoming a candidate in public elections. In order to take self-selection problems into account, we provide quasi-experimental evidence using election discontinuities, in which we compare the likelihood of being nominated for public office between closely ranked winners and losers in Swedish student union (SU) elections. Our original data cover 5,000 SU candidates and register data on their candidacies in public elections (1991–2010). The analysis provides support to the hypothesis: Students elected to SU councils were about 34 percent (6 percentage points) more likely to become a candidate in a public election than SU council candidates who were not elected. The causal impact is fairly stable over time. The analysis makes important contributions to two interrelated bodies of literature: First, it provides political recruitment literature with causal evidence that acquiring leadership experiences at arenas outside of representative democratic institutions facilitate entry into election processes. Second, it provides strong evidence to an increasingly contested issue within political participation research by showing that certain organizational activities increase individuals’ political involvement.     

Party debate over Europe in national election campaigns: Electoral disunity and party cohesion

Few political parties are willing to lead the public debate on how the European Union should develop and parties rarely publicly discuss issues on the EU agenda. This is probably one of the most important democratic problems in the contemporary EU. When and why parties are willing (or not willing) to discuss European cooperation is therefore an essential issue in which political science should engage. Previous research has shown that parties that are internally divided on EU issues downplay these issues in order to avoid internal disputes. At the same time, parties that have severe intraparty conflicts over the issue are unable to contain the debate. Thus, parties that are unified in their position on EU issues and parties that are heavily split speak about the EU, but others do not. Also, earlier research has shown that political parties downplay issues in response to internal divisions among their supporters. It is argued in this article that the focus should not be solely on intraparty conflict or whether or not a party's voters are hesitant or disunited, but rather on how these factors interact in order to better understand how parties act strategically regarding EU issues. Using a new dataset that relies on quantitative content analysis of quality newspapers during the national election campaigns in the period 1983–2010 in France, Germany, the United Kingdom and Sweden, it is found that parties that have a high degree of internal dissent on European issues, while at the same time having an equally divided electorate, are the parties that are most present in the public debate. Hence, it is the interaction between these two important factors that explains much of the variation in the amount of attention paid to European issues in national election campaigns.     

Islamist politics in migrant cities: local identity cleavages and intra-party politics in Turkey

This article explores how the local party organizations of the Adalet ve Kalkinma Partisi (Justice and Development Party—AKP) interact with complex social structures in migrant-receiving cities in Turkey. Islamist movements are widely viewed as uniquely capable of appealing to working-class migrants. However, the support for Islamist parties varies across migrant-receiving cities. This article argues that local party organizations face two potential sources of discord that they have to resolve in order to build support in migrant neighbourhoods. They have to bridge the regional identity cleavages among different migrant communities while surmounting intra-party conflicts. In pursuing this argument, this article opens up the black box of local identity politics in the industrial heartland of Turkey and provides an ethnographic account of intra-party conflicts and political survival within the AKP.     

A Conceptual Typology of Kin‐State Mediation

In this article, I argue that kin states can play major roles in international mediation processes involving their kin communities. Although kin states may be naturally biased toward their kin, kin states are sometimes actively involved in mediation processes and such involvement is even encouraged by third‐party mediators. In this study, I divide the various roles assumed by kin states in mediation into four main conceptual categories: promoter, quasi‐mediator, powerbroker, and enforcer. My analysis presumes that a kin state can use its close ties with its kin community to make third‐party mediation more successful. I support and illustrate this model using cases of kin‐state involvement in peace processes and examine both the benefits and complications that kin‐state mediation can entail. This study contributes to scholarship examining the effectiveness of biased mediators. I conclude that the role a kin state assumes in a mediation is often context‐dependent, but that third‐party mediators and the international community can use their leverage over kin states to improve the peace process.     

Public confidence in the judiciary: the interaction between political awareness and level of democracy

Apart from the studies that focus on public attitudes toward higher courts in advanced democracies, we know little about the factors that can explain public confidence in the judiciary in a comparative setting. In this regard, the goal of this study is to explain whether, and to what extent, the country's level of democracy moderates the impact of political awareness on public confidence in the judiciary. This study uses hierarchical linear models to analyse the interaction between individual and country level factors by using the World Values Survey (2005–2009) data for 49 countries and various other data sources. Our empirical results show that in advanced democracies political awareness variables like education and political participation have a positive impact on public confidence in the judiciary, whereas in countries with weak levels of democracy higher political awareness leads to increased cynicism about the judiciary. These results suggest that a one-size-fits-all approach to explain confidence in the judiciary is not possible when we are dealing with a wide range of societies that vary in terms of many characteristics, both institutional and cultural.     

Evaluation of the Postmortem Glucose and Glycogen Levels in Hepatic,Renal, Muscle,and Brain Tissues: Is It Possible to Estimate Postmortem Interval Using These Parameters?

The aim of our study was to investigate the postmortem levels of glucose and glycogen in hepatic, renal, muscle, and brain tissues and then examine the changes in those levels that could be useful for estimating postmortem interval. We established an animal model. Seventy female BALB/c albino mice were used in this study. After being sacrificed, the mice were randomly divided into six groups according to time elapsed since death (Group 1: 0 h; Group 2: 12 h; Group 3: 24 h; Group 4: 36 h; Group 5: 48 h; and Group 6: 60 h). Glucose levels were significantly different between groups for all tissues studied. Slope of the change per unit time was higher for the hepatic glucose levels. Based on these results, it is possible to estimate postmortem interval using postmortem glucose levels in hepatic tissue. Tissue‐specific assessment may contribute valuable information to postmortem interval studies.