The effect of re-annealing on the distribution of refractive index in a windscreen and a windowpane classification of glass samples

Tiny glass fragments of two typical objects being of interest in forensic investigations: car windscreen and windowpane were examined from the point of view of their importance as crime evidence. Both examined objects were made from float glass and were toughened. The present paper concerns examination of refractive index distribution across the objects under investigation before and after the glass fragments were annealed according to previously chosen procedure. The annealing procedure was carried out in order to increase discrimination power of refractive index (RI). The following conclusions can be drawn from the results obtained. For both examined objects the mean RI was significantly higher after annealing and, at the same time, standard deviations in RI were smaller. The distributions of RI for both examined objects appeared not to be normal; the deviations from normality were observed at both sides of RI distributions. It was found that the difference in the values DeltaRI (difference between mean values of RI after annealing and before annealing) for both examined object was not significant and thus it would be not a good parameter to differentiate between two heat strengthen objects. The attempt to classify 181 glass samples on the basis of theirs RI and DeltaRI was performed. Increased discrimination of glass samples was observed.     

The Militarization of Urban Marginality: Lessons from the Brazilian Metropolis

This article examines the workings and effects of the penalization of poverty in urban Brazil at century's turn to uncover the deep logic of punitive containment as state strategy for the management of dispossessed and dishonored populations in the polarizing city in the age of triumphant neoliberalism. It shows how ramifying criminal violence (fed by extreme inequality and mass poverty), class and color discrimination in judicial processing, unchecked police brutality, and the catastrophic condition and chaotic operation of the carceral system combine to make the aggressive deployment of the penal apparatus in Brazil a surefire recipe for further disorder and disrespect for the law at the bottom of the urban hierarchy and steers the country into an institutional impasse. The policy of punitive containment pursued by political elites as a complement to the deregulation of the economy in the 1990s leads from the penalization to the militarization of urban marginality, under which residents of the declining favelas are treated as virtual enemies of the nation, tenuous trust in public institutions is undermined, and the spiral of violence accelerated. Brazil thus serves as a historical revelator of the full consequences of the penal disposal of the human detritus of a society swamped by social and physical insecurity. Drawing parallels between penal activity in the Brazilian and the U.S. metropolis further reveals that the neighborhoods of urban relegation wherein the marginal and stigmatized fractions of the postindustrial working class concentrate are the prime targets and proving ground upon which the neoliberal penal state is concretely being assembled, tried, and tested. Their study is therefore of urgent interest to analysts of international politics and state power at the dawn of the twenty-first century.     

Why do evaluation researchers in crime and justice choose non-experimental methods?

Despite the general theoretical support for the value and use of randomized controlled experiments in determining ‘what works’ in criminal justice interventions, they are infrequently used in practice. Reasons often given for their rare use include that experiments present practical difficulties and ethical challenges or tend to over-simplify complex social processes. However, there may be other reasons why experiments are not chosen when studying criminal justice-related programs. This study reports the findings of a survey of criminal justice evaluation researchers as to their methodological choices for research studies they were involved in. The results suggest that traditional objections to experiments may not be as salient as initially believed and that funding agency pressure as well as academic mentorship may have important influences on the use of randomized controlled designs.In August 2005, Dr. Lum’s affiliation will change to George Mason University.     

Die Bundesrepublik als Sanierungspflichtige einer Rüstungsaltlast

In jüngerer Zeit sind Entscheidungen ergangen, die sich mit der Haftung für so genannte militärische Altlasten oder Rüstungsaltlasten befassen ¹ . Zu dieser Frage hat sich Verfasser anlässlich der Sanierung einer solchen Altlast im Jahre 2000 gutachtlich geäußert ² . An ihn ist jüngst der Wunsch herangetragen worden, die relevanten Teile des Gutachtens zu publizieren. Da diese Teile unverändert aktuell sind, kommt Verfasser dem Wunsch nach. Er schildert stark verkürzt zuerst den Sachverhalt, der zu der Rüstungsaltlast führte, weil es sich um eine immer wieder auftauchende Konstellation handelt. Dann werden die entscheidenden Rechtsfragen beantwortet. 1) Z.B. BVerwG, NVwZ 2004, 1125=DVBl. 2004, 1032ff.; OVG Lüneburg, Urt. v. 21. 4. 2004 – 7 LC 97/02 und 98/02, NuR 2004, 684 und 687.2) Auftraggeber war das Land Hessen. Verfasser ist Herrn Wolf vom staatlichen Umweltamt Marburg zu großem Dank für die Überlassung von Material und vielen Hinweisen verpflichtet.—Auf der Grundlage dieses Gutachtens hat der Bund dem Land Hessen einen großen Teil der Sanierungskosten bezahlt.—Die Sanierung der Altlast ist mittlerweile erfolgreich abgeschlossen.     

Estimation of Gestational Age from Tooth Germs: Biometric Study of DentaScan Images

Abstract: The few available studies on fetal age estimation concern very small samples, and statistical analysis is sometimes inadequate. In this survey, we used germs of deciduous teeth to estimate fetal age. Forty‐nine fetuses and 40 mandibles were scanned, and observations and measurements were made on DentaScan images. After checking their repeatability and reproducibility (analysis of variance), we defined thresholds using Fisher’s linear discriminant analysis to calculate the probability that a fetus was over or below a predefined age threshold. The forensic threshold which is of particular interest in France is 22 weeks amenorrhea. Relationships between fetal age and deciduous germ measurements were then sought by multiple linear regression. The thresholds gave very good results: 91.84% of good probability for the threshold of 22 weeks amenorrhea with no chance of error. The most precise age evaluation obtained nevertheless gave a range of ±4.6 weeks amenorrhea, so greater accuracy is still needed.