Christian Witte

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The objectives of this research were to develop and evaluate an approach for object-oriented mapping of banana plantations from SPOT-5 imagery, and to compare these results to banana plantations manually delineated from high spatial resolution airborne imagery. Cultivated areas were first identified through large spatial scale mapping using spectral and(More)
Friction is an undesired phenomenon in many drive systems. Feedforward of a suitable estimate of friction is an effective method to compensate the friction-dependent position errors in the steady state. The speed of reconstruction of the real friction is crucial for the grade of improvements which can be achieved for the transient behaviour. A nonlinear(More)
We show an electrical method to break open living cells amongst a population of different cell types, where cell selection is based upon their shape. We implement the technique on an optoelectronic platform, where light, focused onto a semiconductor surface from a video projector creates a reconfigurable pattern of electrodes. One can choose the area of(More)
An optoelectronic tweezing (OET) device, within an integrated microfluidic channel, is used to precisely select single cells for lysis among dense populations. Cells to be lysed are exposed to higher electrical fields than their neighbours by illuminating a photoconductive film underneath them. Using beam spot sizes as low as 2.5 μm, 100% lysis efficiency(More)
Acknowledgments The authors would like to thank: • Dave Harris for field data collection and project planning • Tim Danaher for project support and assistance in development of the methodology • FERA staff for initial fieldwork and project support • Kerstin Jones for digital video interpretation • South West Pacific Helicopters for a flexible approach and(More)
E-vehicles are expected to become increasingly important in the logistics sector. Global use of delivery vehicles with combustion motors causes a significant percentage of total emissions and is responsible for climate change, shortage of fossil fuels and pollution in urban areas. Simultaneously, cargo volumes are increasing, especially in urban regions due(More)
Yüksekö¤retimdeki kampüs içinde uygulamal› a¤ kurma derslerini modernlefltirmede bir ön gereklilik olarak ö¤rencilerin ö¤renim davran›fl›n›n ve baflar›s›n›n de¤erlendirilmesi C C omputer science curricula for students at universities nowadays include courses on networking and information technology (IT) security. Teaching theory on networking and IT(More)
Supporting students with feedback and guidance while they work on networking exercises can be provided in on-campus universities by human course advisors. A shortcoming however is that these advisors are not continuously available for the students, especially when students are working on exercises independently from the university, e.g. at home using a(More)
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