Food security is directly related to nutrition and public health. It concerns the availability of food needed by people, its accessibility consumers, including financial aspects accessibility, utilization in sufficient quantity quality ensure full life, stability, i.e. ability resist negative changes that occur supply chains. a causal path begins with production leads consumption, going through...

Abstract Utility engineers faced with the challenges of integrating new generation into existing power systems, clearing faults more quickly or finding an alternative to SF6 breakers will soon have a new product to meet all of their needs: a solid state current limiting circuit breaker. Electric utilities have long wished for a practical, reasonably priced, solid state circuit breaker which cou...

Collective impact ionization has been used to exT1ain lock-on in semi-insulating GaAs under highvohage bias. W7ehave used this theory to study some of the steady state properties of lock-on current filaments. In steady state, the heat gained from the field is exactly compensated by the cooling due to phonon scattering. In the simplest approximation, the carrier distribution approaches a quasi-e...