Fabrication and performance of a functional photonic-microfluidic flow cytometer is demonstrated. The devices are fabricated on a Pyrex substrate by photolithographically patterning the microchannels and optics in a SU-8 layer that is sealed via a poly(dimethylsiloxane) (PDMS) layer through a unique chemical bonding method. The resulting devices eliminate the free-space excitation optics throug...

In this paper, the extension of integrity constraint mechanisms in order to maintain consistency in multiversion databases is studied. Unlike monoversion databases, a multiversion database represents several states of the modeled universe. Thus, both the notion of consistency and the means to maintain it have to be extended. This goal requires studying new integrity constraints induced by versi...

In the first part of this paper, the Ritter-Kolb catalogue (RKcat for short), its history and a few examples of its application to research in the field of cataclysmic variables are briefly described. In a second part we look forward to possible future applications of RKcat for the study of cataclysmic variables, low-mass X-ray binaries and related objects. Last but not least we also briefly co...

Article history: Received 2 April 2015 Received in revised form 12 December 2015 Accepted 17 December 2015 Available online 23 December 2015 Cold chainmanagement is of importance formanufacturers in the food industry since they face the dilemma of having to choose between frozen storage and cool storage in delivering products to retailers or endconsumers. Frozen storage incurs high-energy consu...

In this paper we describe how we have added support for dynamic delegation of authority that is enacted via the issuing of credentials from one user to another, to the XACML model for authorisation decision making. Initially we present the problems and requirements that such a model demands, considering that multiple domains will typically be involved. We then describe our architected solution ...

The current prominent influence of the theories of L. S. Vygotsky on studies of education, particularly of pedagogic practice, requires a re-examination. The dominance of deficient editions of his writings has had regrettable consequences such as a misplaced reading of the ‘zone of proximal development’. The publication of his recent, albeit incomplete, Collected Works in English affords an opp...

Andreas Vesalius reformed anatomical knowledge and teaching in the Renaissance by adopting Galenic methods from the classical past. His careful drawings revealed the human body in unprecedented and realistic detail, but the images of himself were more ambiguous.