Temporal transaction patterns in an open-air cannabis market

This article describes the results of a nine-month covert surveillance operation of Scandinavia’s principal open-air cannabis market, an area known as Christiania in Copenhagen Denmark. The data detail the time of day of retail transactions from four different sale positions, both outdoor (daytime: n = 1.123, nighttime: n = 1.282) and indoor (n = 63,413). The analysis provides insights into the tempo, rhythm and timing of cannabis transactions, over the course of a day, on weekends compared to weekdays and in relation to payday. It is found that buyers prefer lower price over wider selection and that sellers adapt their opening hours according to temporal patterns in transaction frequency. The findings are relevant for deployment of police resources in regards to maintaining post-crackdown residual deterrence.     

金丝桃素可溶性粉体外抗犬瘟热病毒的试验研究

采用先药后毒、先毒后药和药毒同加3种不同的给药方式,分别在试验开始后第72 h和96 h观察犬瘟热病毒致Vero细胞的病变情况.结果显示,犬瘟热病毒的TCID_(50)为10~(-5.68)/0.1 mL,药物的TC_0为0.312 5 g/L;与对照组比较,药物浓度在0.039～0.312 5 g/L范围内先毒后药方式的细胞生长情况良好,细胞单层完整,视野中有极少量圆细胞或死细胞,而其余两种给药方式的细胞病变明显.结果表明,金丝桃素可溶性粉在先毒后药情况下可以有效抑制犬瘟热病毒的增殖.     

Portfolio allocation patterns and policy-making effectiveness in minority coalition governments

Although minority coalition has become a relatively frequent form of governance, it is often considered politically ineffective in policy making. To obtain sufficient support in parliament, government bills must go through the scrutiny activities initiated by coalition partners and overcome the concerns of external support parties in opposition. By examining parliamentary scrutiny on government bills, this paper explains the surprising policy-making effectiveness in minority coalition governments. Specifically, we argue and show that different patterns of portfolio allocation with the specific ideological locations of the ministerial office-holder, the coalition partner and the external supporter, structure the extent to which government bills are scrutinized in parliament, and therefore, the effectiveness of the minority coalition on managing and implementing policies. We empirically examine bills initiated by 256 ministries in 13 Danish minority coalitions between 1985 and 2015, and we reveal robust evidence that corroborates our argument.     

Patterns of precursor behaviors in the life span of a U.S. environmental terrorist group

Research Summary
This article discusses the paucity of data available for assessing the "life span" of a terrorist group. It introduces a new methodology that allows researchers to examine when terrorist groups perform their preincident activities. The findings suggest that differences exist in the temporal patterns of terrorist groups: environmental terrorist groups engage in a relatively short planning cycle compared with right-wing and international terrorists. The article concludes by examining a case study on "the Family," which is a unique environmental terrorist group that conducted activities over a relatively long period of time. This group provides an interesting contrast to other environmental terrorists. Despite significant organizational differences, their patterns of preparatory conduct were highly similar.
Policy Implications
The findings suggest that (1) temporal and spatial data about preincident terrorist activity can be collected from unclassified and open sources and (2) law-enforcement agencies that are investigating environmental groups have relatively little time to observe and infiltrate their individual cells (compared with right-wing and international terrorists). Finally, the data suggest that environmental terrorists—at least so far—have engaged in attacks that are less deadly than the comparison groups.     

The Potential of X‐Ray Diffraction in the Analysis of Burned Remains from Forensic Contexts*

Abstract: In view of the difficulties in extracting quantitative information from burned bone, we suggest a new and accurate method of determining the temperature and duration of burning of human remains in forensic contexts. Application of the powder X‐ray diffraction approach to a sample of human bone and teeth allowed their microstructural behavior, as a function of temperature (200–1000°C) and duration of burning (0, 18, 36, and 60 min), to be predicted. The experimental results from the 57 human bone sections and 12 molar teeth determined that the growth of hydroxylapatite crystallites is a direct and predictable function of the applied temperature, which follows a nonlinear logistic relationship. This will allow the forensic investigator to acquire useful information about the equilibrium temperature brought about by the burning process and to suggest a reasonable duration of fire exposure.     

Acute Respiratory Obstruction due to Accidental Inhalation of Perlite: A Novel Mechanism for Upper Airway Occlusion with Cast Formation

A 56-year-old man died following a fall resulting in complete submersion into a deep pit containing insulation material, expanded perlite. The most striking finding at autopsy was of impacted, moist pale yellow perlite that extended from the epiglottis into the main bronchi resulting in complete obstruction of the larger and smaller airways with cast formation. Perlite inhalation differs from inhalation of inert materials such as sand and wheat due to its hygroscopic properties and ability to expand forming an occlusive cast. Subsequent analyses of perlite from the worksite and within the airways indicated that hydration of perlite and adsorption of organic molecules into the perlite glass flakes had formed an interlocking, three-dimensional structure that was likely responsible for triggering a coagulation–flocculation process causing strong cohesion between the aggregates of glass flakes. This unique mechanism was likely responsible for the formation of the plug of perlite that obstructed the upper airway.     

Fingermarks development on gloves: Relative efficiency of 1,2 Indanedione/ZnCl2, ninhydrin and wet powder

Powder suspensions such as wet powder are used to develop fingermarks on adhesive surfaces. They can also be used on gloves but these ready-to-use commercial pre-mixed solutions are not entirely satisfactory. Among other things, they generate some background noise that can sometimes be substantial and make the exploitation of the fingermarks difficult. Recent studies have proven the effectiveness of a HFE ninhydrin solution on some types of gloves. Ninhydrin and 1,2-indanedione are reagents that are commonly used for the visualisation of fingermarks on porous and semi-porous substrates. Applying them on gloves might help to overcome the issue of background noise being produced by powder suspensions. In this study, several formulations of ninhydrin and 1,2-indanedione are compared to wet powder on a sample of nitrile, latex and vinyl gloves. The subsequent results show a greater effectiveness with the use of wet powder.     

Sequential angulation,spatial dispersion and consistency of distance attack patterns from home in serial murder,rape and burglary

Abstract

Three related measures of spatial movement (sequential angulation, spatial dispersion and consistency of distance in attack target) were compared across three serial offence types: serial homicide (n=35), serial rape (n=41) and serial burglary (n=30). In each case, each offender had committed at least five offences. “Spatial dispersion”, defined as the extent to which an offender distributes his offences across either a focused or relatively more evenly distributed area, revealed that burglary was less evenly distributed (i.e. more focused) than rape and murder. “Sequential angulation”, defined as the degree of rotational movement around the home of the offender from one offence to the next, revealed that serial murderers have higher angulation scores than do rapists who, in turn, have higher angulation scores than burglars. Lastly, a comparison of the offender's consistency in the relative distance travelled from home to each attack site (“consistency of distance in attack target”) was relatively similar across the three groups. This was despite the comparison of different serial offence types from disparate geographical areas. The supposition that differences in dispersion and sequential angulation scores across crime types are related to the perceived risk of the crime has been confirmed. The specificity and the mobility of the targets are also discussed.     

Network migration,marriage patterns,and adaptation in rural Portugal and among Portuguese immigrants in Argentina, 1870–1980

This article examines marriage patterns among immigrants and their children as a way to analyze the interplay of primary social networks and local conditions in the social adaptation of two communities of Portuguese immigrants in Argentina. Its main focus is on the factors involved in marriages within the same ethnic group and their evolution over time from a comparative perspective. The analysis considers aspects of marital selection in the main places of origin of the immigrants in the Algarve, southern Portugal, and their influence in the places of settlement; the factors that influenced the selection of spouses in both communities by gender and over time; and the changes from the first to the second generation. Factors, such as gender, the nature and rhythm of immigration, and the occupation of the immigrants and their families, proved very important in marital selection. Environmental factors were also significant. Oil production dominated Comodoro Rivadavia, while intensive family farming in a suburban setting characterized Villa Elisa. Through the comparative analysis of these two contrasting, receiving societies, the article examines the interplay between primary social networks based on national and ethnic origin and socioeconomic local conditions.     

Jewish–Gentile intermarriage in pre-war Amsterdam

Intermarriage is generally regarded as the litmus test in the process of assimilation of ethnic-minority groups. The Jewish community in Amsterdam was a religious minority. When a Jew married a Gentile it was assumed that Judaism lost a family. Odds ratio calculations based on marriage tables for 1911–1941 show that the rate of intermarriage among Jews was much lower than among Catholics, Protestants and religious unaffiliated. Although the Jewish community might still be more homogeneous than the Protestant and Catholic communities, it was rapidly assimilating as the log odds ratios for Jews dropped more heavily. While mutual aversion is reflected in the remaining high log odds ratios for Jewish–Catholic marriages, Jewish–Protestant marriages and Jewish–unaffiliated marriages increased because of the higher propensity among Protestants to marry a Jew and the higher propensity among Jews to marry an unaffiliated spouse from the 1920s onwards. Next, we created life courses for a sample of 480 descendants from Jewish grandparents living in Amsterdam in 1941 of whom we know were married to a Gentile or to a Jew. The collected data from the Amsterdam registry allow us to test several hypotheses on preferences, opportunities and third parties in a logistic regression analysis. One's own affiliation significantly influenced the preference to marry a Gentile or a Jew. Successive marriage cohorts showed a higher chance to marry a Gentile among those who had Jewish parents at birth. A similar but weaker effect is found for those born in the old Jewish neighborhood. These differences in effect on later marriage cohorts indicate that religious and social barriers within the Jewish community had largely diminished. Opportunities like the social network of the mother and the living district during one's adolescents' age also significantly influenced the choice of a spouse.