ebm-papst

Light weight and high power density are contemporary demands on electrical motors in a lot of industrial and transportation applications. By designing high-speed devices, the output power can be increased without affecting construction volume and weight. If an application requires low output speeds, a gearing function has to be added. In this paper, the optimization of a new topology comprising a high speed motor and a magnetic gear is discussed. Also, first measurements of a prototype are presented.

This study presents a new chemical double-marking technique for European glass eels Anguilla anguilla by combing alizarin red S (ARS) and strontium chloride hexahydrate (Sr). Marked eels (double marked with ARS and Sr, but also single marked with ARS) were exposed in situ to brackish water (15 g l-1 artificial sea salt) for 14 days and did not exhibit increased mortalities compared with unmarked eels. Indeed, no mortality occurred in a marked group during the experiments. Moreover, an efficient mass-marking approach with low handling effort for both single ARS and double ARS-Sr techniques is described and was proven to be practicable for large-scale stocking programmes.

Carl von Weizsäcker analyzes the information concept in the framework of his own philosophy. He emphasizes, on the one hand, the irreversibility inherent in the time structure and, on the other hand, the dependence of information on temporal relations. In his view, information constitutes an abstract, albeit real, element of the world related to the form, structure, and order. Its quantitative and dynamical character assimilates it to matter and energy. Information does not exist outside material processes and human consciousness. Its dynamical aspect is strictly connected with communication, and evolutionary and entropic processes. In Weizsäcker's view, information becomes a philosophical concept. His approach hardly could be regarded as a full theory of time and information; it is rather an attempt at grasping their mutual dependencies and meaning.