Exploring Human Activity Patterns Across Cities through Social Media Data

Cities are complex systems, a particular dimension largely contributing to the complexity of cities is detected in the multiplicity of the behaviour of people who inhabit. In the urban context, these behaviours can be inferred from human activities. Understanding the distinctions of these activities between cities is crucial. Previous works...

Novel digital controller for boost PFC

LED lighting, as the fourth-generation lighting technology, is developing rapidly over the past years due to its high energy efficiency, longer life span and sustainability compared to incandescent light bulbs and CFLs. Today’s stand-alone LED drivers for professional lighting systems contain two cascaded power converters: an input and an output...

Development and Characterization of an Endoscopic TOF PET System

The endoscopic time-of-flight (TOF) positron emission tomography (PET) concept has many advantages compared with the traditional PET system. It improves the image quality by delivering higher spatial resolution and enhancing the signal-to-noise ratio. Implementing the endoscopic TOF PET system in an ultrasonic probe requires an ultra...

Architecting High Performance Multi-tier Enterprise Information Systems

This master thesis presents an empirical system architecting process, which addresses the system performance of multi-tier information systems in an enterprise environment. The process is demonstrated by a real practical architecting project as a case study. Such an architecting process begins from performance requirement analysis and ends with...