International developments in WIM

This presentation will give an overview of the different techniques of dynamic weighing (both in-road and on-board). It will show the main applications, advantages and limitations of current WIM systems. This will be combined with a number examples of implementations of Wim systems from around the world.Papers Presented at the 2018 37th Southern African Transport Conference 9-12 July 2018 Pretoria, South Africa. Theme "Towards a desired transport future: safe, sufficient and affordable"

Steekproef voor de bodemeigenschappen en grondwatertrappen van de bodemkaart van Nederland, schaal 1:50.000: Kaarteenheden met Gt V

Door een gestratificeerde aselecte steekproef in kaarteenheden met grondwatertrap V is statistisch betrouwbare informatie verkregen over de gemiddeld hoogste en laagste grondwaterstand (GHG resp. GLG) én bodemparameters (CEC, pH, organische stof, aluminium, ijzer, fosfaat, lutum, leem, M50). De kaarteenheden zijn gestratificeerd naar bodem, landschap, moedermateriaal en naar bodemgebruik `natuur'. De gemiddelde GHG varieert van 37 tot 108 cm , de GLG van 98 tot 212 cm beneden maaiveld. Natuurgebiedenzijn niet fosfaatverzadigd, de overige berekende strata verzadigd. De verschillen in zuurgraad en organischestofgehalte zijn groot

The structure of the symptoms of major depression:Factor analysis of a lifetime worst episode of depressive symptoms in a large general population sample

Background: A range of depressive symptoms may occur during an episode of major depression (MD). Do these symptoms describe a single disorder liability or different symptom dimensions? This study investigates the structure and clinical relevance of an expanded set of depressive symptoms in a large general population sample. Methods: We studied 43,431 subjects from the Dutch Lifelines Cohort Study who participated in an online survey assessing the 9 symptom criteria of MD (DSM-IV-TR) and additional depressive symptoms during their worst lifetime episode of depressive symptoms lasting two weeks or more. Exploratory factor analyses were performed on expanded sets of 9, 14, and 24 depressive symptoms. The clinical relevance of the identified symptom dimensions was analyzed in confirmatory factor analyses including ten external validators. Results: A single dimension adequately accounted for the covariation among the 9 DSM-criteria, but multiple dimensions were needed to describe the 14 and 24 depressive symptoms. Five dimensions described the structure underlying the 24 depressive symptoms. Three cognitive affective symptom dimensions were mainly associated with risk factors for MD. Two somatic dimensions –appetite/weight problems and sleep problems—were mainly associated with BMI and age, respectively. Limitations: Respondents of our online survey tended to be more often female, older, and more highly educated than non-respondents. Conclusions: Different symptom dimensions described the structure of depressive symptoms during a lifetime worst episode in a general population sample. These symptom dimensions resembled those reported in a large clinical sample of Han-Chinese women with recurrent MD, suggesting robustness of the syndrome of MD

Adaptation of Bordetella pertussis to vaccination: a cause for its reemergence?

In the Netherlands, as in many other western countries, pertussis vaccines have been used extensively for more than 40 years. Therefore, it is conceivable that vaccine-induced immunity has affected the evolution of Bordetella pertussis. Consistent with this notion, pertussis has reemerged in the Netherlands, despite high vaccination coverage. Further, a notable change in the population structure of B. pertussis was observed in the Netherlands subsequent to the introduction of vaccination in the 1950s. Finally, we observed antigenic divergence between clinical isolates and vaccine strains, in particular with respect to the surface-associated proteins pertactin and pertussis toxin. Adaptation may have allowed B. pertussis to remain endemic despite widespread vaccination and may have contributed to the reemergence of pertussis in the Netherlands

Oogst, opslag en voedering van snijmais in Noord-Italie : verslag van een studiereis in september 1972

Door de stormachtige ontwikkeling van snijmais komen veel vragen naar voren. Het is daarom nuttig zich te orienteren in landen waar de snijmaisteelt al jaren lang een grote omvang heeft. In dit artikel wordt een korte studiereis naar Italië beschreven. Deze reis werd gemaakt met het doel zich op de hoogte te stellen van de ontwikkelingen bij de oogst, de opslag en de voedering van snijmai