Max Frei theory revisitation: does really strokes depth change along time?

A serious problem in questioned document examination is to establish the age of written lines. With respect to paper dating, in the past, Max Frei theory (based only on microscope analysis) claimed that strokes are time-dependent. Therefore, according to this theory, it has been asserted that from the analysis of the strokes depth changes it is possible to try to date the handwritten document (to find out that the document is older than ...). In the present work, we investigate the strokes depth change by a laser profilometer considering not only the time but also microclimatic variations. First, we analyze the stability of stroke characteristics along the time. In particular, we demonstrate that if the document is preserved without change of temperature and humidity, the depth of the strokes has not appreciable changes. In this way, we have the purpose to verify the real possibility of documents dating by means of Max Frei theory. Subsequently, we test how the 3D profile of strokes changes in connection with the microclimatic variations. In particular, we test humidity variations. With this experiment, we show that humidity variations reduce the strokes depth. Moreover, this effect shows a non-linear trend, leaving a hysteresis on the depth. Finally, we show that the analysis of 3D stroke profile is unable to determine the age of documents.     

Toward a political economy of post-Fordist punishment

This article suggests some new lines of research in the field of the political economy of punishment and some possible new directions for a critical approach to contemporary social control strategies. The starting point is the transition from a Fordist economy to what can be defined as a post-Fordist system of production. I outline some tendencies in the actual capitalist dynamic (concerning the labour market, the production process, the relations between the workforce and capitalist power and between work and social citizenship), suggesting that a renewed political economy of social control has to deal with them. Two tendencies are assumed to be structural. On the one hand, the tendency of the capitalist system to make the production (and extraction) of surplus-value more and more independent of the effective working time (a tendency toward the reduction of human labour in the productive process). On the other hand, the tendency towards the massive introduction of new technologies: a tendency whose main consequences seem to be the intellectualisation of human labour and the decline of the classic distinction between manual and intellectual labour. I assume that these tendencies give rise to a new productive subject (the multitude), whose characters exceed the actual organisation of work and deepen the contradictions intrinsic to post-Fordist societies. Hence, an analysis of some new social control strategies follows, where I consider actuarialism as a technology for the control of these contradictions

Cognizance and Consultation of Randomized Controlled Trials among Ministerial Policy Analysts

Consultation of scientific evidence by policy actors has been the foci of attention of knowledge utilization scholars for decades. The present study questioned the extent to which randomized controlled trials (RCTs)—generally seen as the gold standard of scientific research—are known and consulted by policy analysts in ministerial settings. Using cross‐sectional data collected in 17 ministries in Québec (Canada), our study showed that fairly high levels of policy analysts report never having heard of RCTs, thus possibly hindering effective communication of scientific results to relevant policy makers. Statistical analyses reveal the importance of cognitive factors in explaining both phenomena.     

Environmental cooperation: ratifying second-best agreements

As an alternative to the environmental cartel approach, we assume that an international environmental agreement aims simply at providing a collective response to a perceived threat. Given this less demanding concept of cooperation and considering that most treaties become enforceable only after ratification by a sufficient number of participants, we examine the set of self-enforceable agreements. This set contains first-best but also second-best agreements that do not maximize the collective welfare of members but meet environmental and/or participative requirements. We study the properties of this set and discuss admissible values of targets and thresholds that favour economics over environmental objectives and vice versa.     

更思政治性国际劫机犯罪的司法协作困境——以政治犯不引渡原则为切人

各国意识形态领域的差异以及特定国际事件的国家利益纠葛共同影响了对政治犯不引渡原则的适用．进一步导致了与“政治性目的”有关的国际劫机犯罪的司法协作困境重重。此类劫机事件的困境实质上是各国国家利益、世界人权事业发展与政治自由以及国际打击劫机犯罪等诸多需要的体现。而解决困境的现实方案则是：将具体的“政治性”国际劫机事件所涵括的现实国家利益纠葛作为首要的价值砝码,兼顾事件的人权保护意义与政治自由价值,并在此基础上分类处理。     

Evolution of the content of THC and other major cannabinoids in drug-type cannabis cuttings and seedlings during growth of plants

In Europe, authorities frequently ask forensic laboratories to analyze seized cannabis plants to prove that cultivation was illegal (drug type and not fiber type). This is generally done with mature and flowering plants. However, authorities are often confronted with very young specimens. The aim of our study was to evaluate when the chemotype of cannabis plantlets can be surely determined through analysis of eight major cannabinoids content during growth. Drug-type seedlings and cuttings were cultivated, sampled each week, and analyzed by high-performance liquid chromatography with diode array detection. The chemotype of clones was recognizable at any developmental stage because of high total Δ(9)-tetrahydrocannabinol (THC) concentrations even at the start of the cultivation. Conversely, right after germination seedlings contained a low total THC content, but it increased quickly with plant age up, allowing chemotype determination after 3 weeks. In conclusion, it is not necessary to wait for plants' flowering to identify drug-type cannabis generally cultivated in Europe.     

Dichroism measurements in forensic fibre examination. Part 4-dyed acrylic and acetate fibres

A number of dyed acrylic and acetate fibre samples were examined with plane polarized light on their dichroic behavior by optical light microscopy (OLM) and microspectrophotometry with plane polarized light (MSP-PPL). It was found that most of these low birefringent fibres possess weak dichroic effects that are very hard to observe with microscopy. However, using MSP-PPL, the linear dichroism could be measured. A comparison between the dichroic effects found for the same disperse dyes on triacetate (TrAc), diacetate (Ac), polyester (PES) and polyamide (PA) shows that the linear dichroism follows the order: PA>PES >TrAc, Ac.     

Hair and urine testing to assess drugs of abuse consumption in couples undergoing assisted reproductive technology (ART)

For the first time in Europe hair and urine testing have been applied to assess drugs of abuse consumption in couples undergoing assisted reproductive technology and the eventual association of toxic habits with other lifestyle, health status and sociodemographic factors was also investigated. Couples attending five assisted reproduction centers in Rome were invited to join the study. When they presented at the Centre for the visit, they were asked to answer a structured questionnaire concerning sociodemographic characteristics and lifestyle habits, and at the same time to provide hair and urine samples. Hair and urine testing for drugs of abuse, urinary profile of principal endogenous steroids involved in fertility process (testosterone, epitestosterone, androsterone, etiocholanolone and dehydroepiandrosterone) and of alcohol and tobacco smoke biomarkers were performed with validated methodologies. Of the 594 enrolled individuals (297 couples), 352 (164 couples and 24 single individuals from the couple) completed the questionnaire and gave both hair and urine samples, apart from 3 bald men, who only gave urine samples. Urine testing showed an overall 4.8% (17 individuals) positivity to drugs of abuse: 4.2% to cannabinoids, 1.4% to cocaine and 0.85% to both drugs. Results of 4cm segment hair samples testing matched those from urine samples. Thus, taking together, results of urine and hair testing confirmed repeated use of cannabis, cocaine and both drugs in 3.7, 0.85 and 0.57% examined individuals, respectively. Drug consumers were in a statistically higher percentage active smokers and alcohol drinkers, less prone to physical activity and with a trend towards higher weight than non consumers. Finally, repeated drug consumption was associated with significant lower concentration of urinary testosterone in males and of urinary dehydroepiandrosterone in females. The findings of the present study confirm the suitability of urine testing to disclose recent drugs of abuse consumption and of hair analysis to verify repeated consumption. Association between different toxic habits and sedentary lifestyle is also substantiated by the obtained results in our cohort of couples attending assisted reproduction centers.