Problems of Ensuring Safe Operation of Freight Wagon Trolleys at Low Temperatures

Li-Ion Cell Operation at Low Temperatures

Locomotive and Wagon Scheduling in Freight Transport

We present a new model for a strategic locomotive scheduling problem arising at the Deutsche Bahn AG. The model is based on a multi-commodity min-cost flow formulation that is also used for public bus scheduling problems. However, several new aspects have to be additionally taken into account, such as cyclic departures of the trains, time windows on starting and arrival times, network-load depe...

A Rescue Robot Control Architecture Ensuring Safe Semi-autonomous Operation

The rescue robots developed at the International University Bremen (IUB) are semi-autonomous mobile robots providing streams of video and other essential data via wireless connections to human operated basestations, supplemented by various basic and optional behaviors on board of the robots. Due to the limitations of wireless connections and the complexity of rescue operations, the full operati...

Wide-aperture TeO₂ AOTF at low temperatures: operation and survival.

The effect of temperature on the performance in a wide-angle paratellurite acousto-optic tunable filter (AOTF) is analyzed on the example of two different AOTF configurations. The present study is a by-product of the AOTF characterization for space-borne applications. The two AOTFs serve as dispersion elements in spectrometers for Moon and Mars space missions. The operation of the AO filters wa...

Effects of zeolite on growth and hematology of rainbow trout (Oncorhynchus mykiss) kept at low temperatures

It is known that zeolite, tested in animal feeds in recent years, has a positive effect on fish growth and many physiological parameters. For this purpose, rainbow trout (Oncorhynchus mykiss) was fed with feeds containing zeolite at different rates (1%, 3%, and 5%) for three months in the present study. Fish growth parameters (live weight gain, specific growth rate, feed conversion rate, condit...