100%-Biofütterung mit Rapskuchen und heimischen Körnerleguminosen bei der Fütterung von Legehennen verschiedener Herkünfte

Rations of 100% organic and local origin were tested. Up to 18% of thermally proc-essed rape cake was fed in different rations to two groups of laying hens. Faba beans, Vicia sativa and blue lupines were used as protein supplements to create a feeding ration. High vicine and covicine contents, especially in Vicia sativa, led to a refusal of some food rations. No ration has been found suitable for daily use. Chicken fed with a rape cake ration laid eggs with a positive fatty acid pattern, which is favourable for human diets

The Missing Link Between Student Capabilitiesand Motivation: Perceived Self-Efficacy

In recent years, the lack of students’ motivation has become critical all over the world because of the decrease in work opportunities for young people without general or vocational secondary education. Currently, there is an interest in the ways in which teachers in youth education can foster students’ development of competencies and motivation. This paper explores the premise that teachers should move beyond competencies and motivation and consider the perceived self-efficacy that represents the ‘missing link’ between the two student characteristics. The paper deals with two research questions: how can teachers generate knowledge about perceived self-efficacy, and which aspects of the perceived self-efficacy are the most important in relation to learning outcome

Transmission needs across a fully renewable European power system

The residual load and excess power generation of 27 European countries with a 100% penetration of variable renewable energy sources are explored in order to quantify the benefit of power transmission between countries. Estimates are based on extensive weather data, which allows for modelling of hourly mismatches between the demand and renewable generation from wind and solar photovoltaics. For separated countries, balancing is required to cover around 24% of the total annual energy consumption. This number can be reduced down to 15% once all countries are networked together with uncon- strained interconnectors. The reduction represents the maximum possible benefit of transmission for the countries. The total Net Transfer Capacity of the unconstrained interconnectors is roughly twelve times larger than current values. However, constrained interconnector capacities six times larger than the current values are found to provide 97% of the maximum possible benefit of cooperation. This motivates a detailed investigation of several constrained transmission capacity layouts to determine the export and import capabilities of countries participating in a fully renewable European electricity system