Eruption times of permanent teeth in male children and adolescents of Tehran (Iran)

The eruption times of permanent teeth and the sequence of tooth eruption were investigated in 952 individuals aged 4 to 24 years. Wisdom teeth were excluded from the evaluation. All individuals were inhabitants of Tehran, Iran. The results were compared to results of international studies on tooth eruption of the 20th century and studies published in recent years. The teeth emerged symmetrically in each jaw. However, teeth erupted earlier in the mandible than in the maxilla, excluding the earlier eruption of maxillary premolars. The sequence of emerging teeth in the maxilla is: first molar, central incisor, lateral incisor, first premolar, second premolar, canine, and second molar. The sequence of tooth eruption of the mandible differs from the maxillary sequence: first molar, central incisor, lateral incisor, canine, first premolar, second premolar, second molar. The sequence of all teeth is: lower first molar, lower central incisor, upper first molar, upper central incisor, lower lateral incisor, upper lateral incisor, upper first premolar, lower canine, lower first premolar, upper second premolar, upper canine, lower second premolar, lower second molar, and upper second molar. The results support current theories that the differences in tooth eruption times between humans of different ethnic origin are small.     

Not Enough Pieces of the Cake? The Moro National Liberation Front (MNLF) in the Mindanao Final Agreement

Abstract

Civil wars frequently end with the signature of a peace agreement, which often includes power-sharing provisions. While most research focuses on their provisions, little research has been done on the question of how the content of peace agreements affects the groups signing them. Instead, research commonly depicts the conflict parties as unitary actors. This study tries to fill this research gap by asking how the content and implementation of the Mindanao Final Agreement affected the cohesion of the Moro National Liberation Front (MNLF). The analysis concludes that the implementation of power sharing is decisive. The failed inclusion and the low implementation of economic and territorial provisions had major effects on the cohesion of the MNLF.     

Long-term evaluation of a bimodal universal prevention program: effects on antisocial development from kindergarten to adolescence

Objectives

Only a handful of studies on developmental crime prevention contain very long-term evaluations and all these addressed high-risk groups in English-speaking countries. In contrast, this article investigates long-term outcomes of a bimodal universal prevention program within the Erlangen-Nuremberg Development and Prevention Study (ENDPS) in Germany.

Methods

The ENDPS is a combined prospective longitudinal and experimental project that originally consisted of 675 kindergarten children from 609 families who were nearly representative for the local area. In the prevention part of the project, a group-wise randomization and matched pairs design was used to evaluate a training of children’s social problem solving skills, a parent training on positive parenting behavior, and a combination of both programs. Originally, 239 children were each in the program group and control group. Outcomes were measured after ca. 3 months, and 2, 5, and 10 years. The outcome measures varied over time and contained, inter alia, reports on child behavior in the Social Behavior Questionnaire (SBQ) from kindergarten teachers, school teachers, mothers, and the youngsters themselves. The overall retention rates in the ENDPS were satisfactory (e.g., 90 % after 10 years), but missing data from various informants further reduced the groups over time. The outcome evaluation was mainly carried out by causal regression models.

Results

There were various desirable effects of the program not only in the short and medium term but also after 5 and 10 years, i.e. on externalizing behavior, property offences, and total behavioral problems. The significant effects were mostly small (d?=?.23–.59) and significances became rare over time. As a trend, the combined parent and child training and the child training alone were more effective; however, this was not consistent across all follow-ups. The outcomes did not only vary with regard to time but also between different measures and informants. The youth self-reports and teacher reports were more suitable to detect effects than the mothers’ reports. Children at higher risk seemed to benefit most from the intervention; however, this was also not fully consistent across measures and times.

Conclusions

The various desirable effects of a relatively short and inexpensive universal program are in accordance with a public health approach in developmental crime prevention. However, it should not be seen as an alternative to selective and indicated approaches, but as a ‘foot in the door’ for high-risk children and families that need more intensive and costly programs. The variations in results across time, outcome measures, informants, and program components confirm the heterogeneity of meta-analytic findings in the field. Therefore, one must be aware of ‘fishing for significances’ and research on ‘what works’ should go beyond the content of programs. More studies should investigate how characteristics of program delivery, contexts, participants, and evaluation methods contribute to effectiveness.     

Policy persistence and rent extraction

The existing literature has shown that special interest groups can have both growth enhancing and growth retarding effects on an economy. In either case, it is always assumed that the nature of the special interest groups remains constant over time. The hypothesis of this paper is that a dynamic relationship exists between politicians and lobbyists, i.e., that opportunities for rent extraction for special interest groups can evolve over time. In the short run politicians may support “projects” proposed to them by lobbies, because they yield clear economic benefits. However, continued governmental support may imply a cost to society and yield rents to the lobbies. A theoretical framework in which established and new lobbies overlap is developed to model a government’s incentives to behave in a manner consistent with the hypothesis. In this framework, voters can still rationally reelect politicians even if the latter support lobbies for an inefficiently long period of time, because if they did not, then the quality of the pool of new projects would deteriorate.     

The devil is in the shadow. Do institutions affect income and productivity or only official income and official productivity?

This paper assesses the relationship between institutions, output, and productivity when official output is corrected for the size of the shadow economy. Our results confirm the usual positive impact of institutional quality on official output and total factor productivity, and its negative impact on the size of the underground economy. However, once output is corrected for the shadow economy, the relationship between institutions and output becomes weaker. The impact of institutions on total (“corrected”) factor productivity becomes insignificant. Differences in corrected output must then be attributed to differences in factor endowments. These results survive several tests for robustness.     

Forensic imaging of projectiles using cone-beam computed tomography

In patients with gunshot injuries, it is easy to detect a projectile within the body due to the high-density of the object, but artefacts make it difficult to obtain information about the deformation and the exact location of the projectile in surrounding tissues. Cone-beam computed tomography (CBCT) is a new radiological imaging modality that allows radio-opaque objects to be localised and assessed in three dimensions. The full potential of the use of CBCT in forensic medicine has not yet been explored.In this study, three different modern projectiles were fired into the heads of pig cadavers (n = 6) under standardised conditions. Tissue destruction and the location of the projectiles were analysed separately using CBCT and multi-slice computed tomography (MDCT).The projectiles had the same kinetic energy but showed considerable differences in deformation behaviour. Within the study groups, tissue destruction was reproducible. CBCT is less severely affected by metallic artefacts than MDCT. Therefore CBCT is superior in visualising bone destruction in the immediate vicinity of the projectile and projectile deformation, whereas MDCT allows soft tissue to be evaluated in more detail.CBCT is an improved diagnostic tool for the evaluation of gunshot injuries. In particular, it is superior to MDCT in detecting structural hard-tissue damage in the immediate vicinity of high-density metal projectiles and in identifying the precise location of a projectile in the body.     

Umfang und Grenzen der Einklagbarkeit von UVP-Fehlern nach Umwelt-Rechtsbehelfsgesetz

Zusammenfassung  Die Frage der Einklagbarkeit von Fehlern bei der Umweltvertr?glichkeitsprüfung (UVP) ist weiterhin ein rechtlich unsicheres Terrain und damit für komplexe Gro?vorhaben ein erheblicher Risikofaktor. Mit dem Umwelt-Rechtsbehelfsgesetz (UmwRG) hat der deutsche Gesetzgeber Regelungen erlassen, die zwar in gewissem Umfang eine Einklagbarkeit von UVP-Fehlern vorsehen, deren Auslegung jedoch umstritten ist. Der vorliegende Beitrag behandelt die Frage, ob und ggf. in welchem Umfang das UmwRG Drittbetroffenen ein subjektives Recht auf Einklagbarkeit von UVP-Fehlern einr?umt. Es wird aufgezeigt, dass insoweit zwischen Umweltschutzvereinigungen und sonstigen Beteiligten zu differenzieren ist und dass eine Erweiterung der Einklagbarkeit von UVP-Fehlern über die beiden in §4 Abs. 1 UmwRG genannten F?lle (Nichtdurchführung einer UVP bzw. Einzelfallvorprüfung) nach der klaren gesetzlichen Festlegung und der bisher ergangenen Rechtsprechung nicht in Betracht kommt.     

Literatur

Ohne Zusammenfassung