In this study the measurement and structural equivalence was tested across two instruments, the original Dutch version of the Competentie-Beleving Schaal voor Kinderen (CBSK) and a shortened and simplified version of the same test across different ages. The CBSK is intended for children between 8 and 12 years old. The shortened version is developed for children aged between 6 and 8 years old. T...

The human alteration of the nitrogen cycle has evolved from minimal in the mid-19th century to extensive in the present time. The consequences to human and environmental health are significant. While much attention has been given to the extent and impacts of the alteration, little attention has been given to those entities (i.e., consumers, institutions) that use the resources that result in ex...

Individuals form teams to produce an output. The quality and quantity of a team’s output depends on the ability and the effort level of its members. The ability of individuals as well as their work ethic is however imperfectly known. In such an environment, individuals wishing to form a new team can get information about each other from the network of past collaborators. The paper carries out a...

background previous studies have mostly focused on socio-demographic and health-related determinants of health-related behaviors. although comprehensive health insurance coverage could discourage individual lifestyle improvement due to the ex-ante moral hazard problem, few studies have examined such effects. this study examines the association of a comprehensive set of factors including socio-d...

This work is part of the research programme of the " Stichting voor Fundamenteel Onderzoek der Materie (FOM) " , which is financially supported by the " Neder-landse Organisatie voor Wetenschappelijk Onderzoek (NWO) " .

Invasive meningococcal disease (IMD) is a severe bacterial infectious disease with high mortality and morbidity rates worldwide. In recent years, industrialised countries have implemented vaccines targeting IMD in their National Immunisation Programmes (NIPs). In 2002, the Netherlands successfully implemented a single dose of meningococcal serogroup C conjugate vaccine at the age of 14 months a...

Business models behind products such as iTunes and the Skype VoIP clients depend entirely on the secrecy of technical details of their product. Once the technical details are uncovered, a medium such as the Internet is extremely powerful to (anonymously) spread the sensitive information and it is shown that stopping the spread of such highly sensitive information is difficult. Therefore, progra...

An experiment featuring waterhammer in viscoelastic pipes is presented in which the effects of pipe-wall viscoelasticity on waterhammer pressures are investigated. A large-scale pipeline apparatus made of polyvinyl chloride (PVC) at Deltares, Delft, The Netherlands, has been used to carry out waterhammer experiments. Tests have been conducted in a reservoir-pipeline-valve system consisting of a...

a larval parasitoid of carob moth, ectomyelois ceratoniae (zeller), was collected in pomegranate orchards in fars province, iran, during 2009-2010. this parasitoid, which is newly recorded from iran, was identified as goniozus legneri gordh (hym.: bethylidae) by j. de rond (lelystad, the netherlands).