We have investigated the photoionization and photodissociation of free coronene cations C24H12+ upon soft X-ray photoabsorption in the carbon K-edge region by means of a time-of-flight mass spectrometry approach. Core excitation into an unoccupied molecular orbital (below threshold) and core ionization …

A Quad Focus GridPix Gaseous Tracking Detector is under construction, to allow calibration and test beam measurements to validate the working principles of the (quad) GridPix detectors while using a focused electric field. The development is well on its way: both measurements should be able to be conducted …

Earth’s magnetic field, also known as the geomagnetic field, interacts with the solar wind, a stream of charged particles originating from the Sun. The interaction causes the geomagnetic field to undergo variations, called geomagnetic disturbances or geomagnetic activity. This bachelor thesis features …

Het gaan met een bovenbeenprothese is zwaar en ingewikkeld. Er wordt veel coördinatie en timing gevraagd van de prothesegebruiker. Omdat de beenspieren geen moment meer kunnen geven aan de knie, is het buigend moment rond de knie altijd een probleem voor de gebruiker. Dit verslag moet inzicht geven over …

Dit Raakproject beoogt door middel van praktijkgericht onderzoek MKB-bedrijven in de agri & food -sector in staat te stellen om eindgebruikers (consumenten) effectiever te betrekken bij productinnovatie. Tot nu toe doen MKBers dat te weinig omdat ze onvoldoende kennis hebben van klantonderzoek en omdat …

In order to be able to integrate ICT into Inquiry Based Science Education (IBSE), teachers need much time and support for mastering ICT tools, learning the basis of IBSE, and getting experience in applying these tools in pupil investigations. For this purpose, we have developed a course within the teacher …

The challenges of physics teacher education are obvious: 1) physics teaching in schools is often uninspiring and ineffective, the many brilliant ideas for exciting physics are underused; 2) in many countries there is a shortage of qualified physics teachers, enrolments in physics teacher education are …

Scanning tunneling microscopy is an important and enabling tool for condensed matter physics and surface science. The low temperature STM in Leiden (Prof. J. Van Ruitenbeek and Prof J. Aarts) is used for research in the field of atomic/molecular electronics and superconductivity. The current low temperature …

Exposures to ionizing radiation frommedical examinations are on the rise. An important cause for this has been the advent and ever-increasing use of computed tomography (CT) scans for diagnostic purposes. It is often implied that population aging contributes significantly to this rise. Here, the trends …

PURPOSE: Advanced radiotherapy treatments require appropriate quality assurance (QA) to verify 3D dose distributions. Moreover, increase in patient numbers demand efficient QA-methods. In this study, a time efficient method that combines model-based QA and measurement-based QA was developed; i.e., the …