Soil is a basic natural resource for food production, the vast majority of food we consume is either directly or indirectly derived from soil. Soil quality determines the quantity (calories) and quality (nutritional value and safety) of the foods grown. Protecting the soil's physical, chemical and biological integrity is therefore of vital importance in safeguarding global food security. Soil s...

Support for research and development in information technology is considered today as critical by most governments in the industrially advanced countries. Traditionally the way of stimulating research has been to ensure to the investor the appropriability of the returns generated. Such appropriability is typically implemented by means of the Intellectual Property Rigths. Nevertheless the protec...

In this paper, we explain in simple PDE terms a famous result of Bramson about the logarithmic delay of the position of the solutions u(t, x) of Fisher-KPP reaction-diffusion equations in R, with respect to the position of the travelling front with minimal speed. Our proof is based on the comparison of u to the solutions of linearized equations with Dirichlet boundary conditions at the position...

The aim of the relay coordination is that protection systems detect and isolate the faulted part as fast and selective as possible. On the other hand, in order to reduce the fault clearing time, distance protection relays are usually equipped with pilot protection schemes. Such schemes can be considered in the distance and directional overcurrent relays (D&DOCRs) coordination to achieve faster ...

Power systems should have acceptable reliability in order to operate properly. Highly available and dependable protective relays help to obtain the desirable reliability. The relays should be periodically evaluated during specific intervals to achieve the mentioned characteristics. The Routine Test Interval (RTI) should be optimized in order to economically maximize the reliability of the prote...

One of the driving force Microgrid research in past decade has been to accelerate integration renewable energy sources (RES) including wind and photovoltaic (PV) based generation into distribution networks. The islanded mode Microgrids on other hand would not only increase reliability existing networks but also security supply for geographically systems. But as a matter fact, PV systems are inh...