Eurasians were privileged groups of mixed ancestry in Asian colonial societies. They were the result of unions between European males and indigenous women. They neither belonged to the... Show moreEurasians were privileged groups of mixed ancestry in Asian colonial societies. They were the result of unions between European males and indigenous women. They neither belonged to the colonizers, nor to the colonized. When colonization came to an end, the Eurasians found themselves in a difficult position. The European rulers, on which their status was based, were gone. The new indigenous rulers usually perceived them suspiciously as colonial remnants and sometimes even as traitors. In this chaotic, sometimes violent situation, they had to decide where they belonged: in the country of their European fathers or the former colony, the country of their Asian mothers. This was a serious dilemma since they only knew the mother country from stories and lessons at school. In this project I have compared the position and options of the Indo-Europeans with those of similar groups from two other former Asian co lonies, the Anglo-Indians from British India and the Métis people from French Indochina. This study of Eurasians from three former colonies showed that an emancipation paradox of acquiring more rights while discriminated against more at the same time was instrumental in creating the framework in which Eurasians had to make their choices. Show less
Imaging subsurface structures with nanometer resolution has been a long-standing desire in science and industry. To obtain subsurface information one usually applies ultrasound, like e.g. in... Show moreImaging subsurface structures with nanometer resolution has been a long-standing desire in science and industry. To obtain subsurface information one usually applies ultrasound, like e.g. in echocardiography. Implementing ultrasound in an Atomic Force Microscope, a setup that is capable of imaging surfaces with atomic resolution, gives access to additional information. In particular, it is possible to image subsurface structures with nanometer resolution. However, it is not known why the subsurface structures become visible when applying ultrasound during the imaging with an Atomic Force Microscope. Based on a special excitation scheme, which makes use of two ultrasound excitations (one through the sample and one through the cantilever), Heterodyne Force Microscopy seems to be the most promising candidate for imaging deeply buried objects or structures with nanometer resolution. This thesis focuses on the poorly understood elements in Heterodyne Force Microscopy. We studied the ultrasound propagation in the sample, the dynamics of an ultrasonically excited cantilever near a sample that is also vibrating at a slightly diff erent frequency, and the generation of the heterodyne signal. The insight we gained in these matters allowed us to determine the contrast mechanism in a very well-de fined model sample, which contains gold nanoparticles buried in a soft polymer matrix. We show that the contrast in this system is determined by “friction at shaking nanoparticles”. Show less
