Young Birds Killed by Trains

Vibrations induced by trains

This work describes a set of research studies that were made with the intent of studying vibrations created by the circulation of trains. In the last decades, the development of high-speed trains emphasized the need to closely monitor this phenomenon. The purpose of this study is to provide a state-of-the-art about data acquisition process. It also presents a new experience, including important...

Killed by Internet Addiction? A Real Possibility.

Habitat suitability modeling of water birds and waders in Hamun wetland by by Maximum Entropy model

Climate change and human activities have increased negative pressure on natural ecosystems. Wetlands are such ecosystems that widely affected by these negative changes. Birds as a part of wildlife in a wetland have damaged by destruction of wetlands, so, a large group of them, are at risk of extinction. Habitat destruction in wetlands in arid and semi-arid areas has more negative effects on the...

Decorrelation of spike trains by synaptic depression

Synaptic depression modeled after that seen in cortical slices removes correlations from realistic spike sequences. If not removed, such correlations can lead to ine$cient and redundant neural codes. We suggest that this redundancy reduction at individual synapses enables a neuron to better process information from multiple inputs. ! 1999 Elsevier Science B.V. All rights reserved.

Vibration Generated by Underground Railway Trains

The control of vibration generated by railways in tunnels is complicated by the dynamic interaction between tunnel and track. Conventional methods (floating slab track, ballast mats, under-sleeper pads) do not perform as well as might be expected and it is the purpose of this paper to explore the sources of error. The major factors which must be taken into account pertain to the three-dimension...