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Central or Local Compensation of Earth-Fault Currents in Non-Effectively Earthed Distribution Systems

Centralized Petersen coil earthing in networks with extensive use of underground cable involves flow of large quantities of reactive earth fault current. In networks with long radial cable feeders this creates problems involving active losses and active and reactive earth fault current. One possible solution to the problem is the use of local compensation. This paper aims at understanding the limi

Multiplexing efficiency of MIMO antennas in arbitrary propagation scenarios

Multiplexing efficiency has recently been proposed as a performance metric for characterizing the absolute efficiency of MIMO antennas in a reference channel. In this work, we generalize this metric to account for arbitrary propagation channels, so the impact of the channel can also be studied. Using the extended definition of multiplexing efficiency, the respective roles of effective antenna gain

Waste in Overflow

Why is waste such an important topic for understanding the management of overflow? First, because waste is a classic symbol of overflow: to be flooded with too much stuff that demands handling, sorting, and decision-making is a feeling well known in consumer society. Facts and figures speak of the same overflow. Waste disposal is a growing problem. The downside of consumption is a growing mountain

Hints for teaching experiments and demonstrations

Directions are given for demonstrating various topics from the other book chapters: The wave-nature of light, singlet oxygen, chromatic adaptation of cyanobacteria, the properties of the human visual system, photoconversion of rhodopsin, photosynthesis of previtamin D, spectral properties of chlorophyll, photoconversion of protochlorophyllide, separation of chloroplast pigments, photoadaptation of

Modulation of CYP79 genes and glucosinolate profiles in Arabidopsis by defense signaling pathways.

Glucosinolates are natural plant products that function in the defense toward herbivores and pathogens. Plant defense is regulated by multiple signal transduction pathways in which salicylic acid (SA), jasmonic acid, and ethylene function as signaling molecules. Glucosinolate content was analyzed in Arabidopsis wild-type plants in response to single or combinatorial treatments with methyljasmonate

Introduction of molecularly imprinted polymers as recognition elements in conductometric chemical sensors

The construction and demonstration of a conductometric chemical sensor based on a molecularly imprinted polymer (MIP) is reported. Benzyltriphenylphosphonium ions, chosen as a model, were used as the analyte. The MIP based sensors gave, when exposed to the analyte, a significantly higher conductivity reading than the reference sensors. Furthermore, the use of molecularly imprinted polymers as arti