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The modern virtual power plant (VPP) concept is introduced to control the proliferated penetration of distributed generation (DG), energy storage elements and controllable loads. This book utilizes the VPP concept for managing the electrical energy in the power delivery networks. The work presented in this book can be grouped into three phases; the first phase includes the studies concerned with the optimal sizing and siting of DG units. The second phase aims to support the renewable based DG units operation via the optimal sizing of the energy storage elements. While, the third phase...

Recurrent aphthuos ulceration is one of the famous diseases widespread among population. Theorists tried to see the causes and treatment this disease. This book focuses on Bactierological( Types of bactreia in the ulcers), immunological changes (Interleukin-2, Interleukin-10, Human secretory IgA, Tumor Necrosis Factor type and CRP Factor) and the biochemical changes (Iron and Zinc levels) of serum and saliva of patients, The study group consisted of 37 patients with recurrent aphthous ulceration, 19 females and 18 males ranged between 13-62 years old. Patients with family history of aphthous...