the ultimate goal of power system operation and planning is to increase power system reliability which enforces interconnected operation of power system. as a result of power system interconnection, the inter-area oscillation under different disturbances may cause power system partial or total blackout. dc-segmentation of interconnected power systems is a solution in which the topology of the n...

Due to the non-linear load characteristics in domestic three-phase grid system, quality of power transmission is a challenge for researchers. In this paper, harmonics injected system due loads and solution minimisation using hysteresis current controller (HCC) presented. The proposed work consists switched dc such as personal computers, SMPS, etc., connected through rectifier unit. These with o...

Direct current microgrids are attaining attractiveness due to their simpler configuration and high-energy efficiency. Power transmission losses also reduced since distributed energy resources (DERs) located near the load. DERs such as solar panels fuel cells produce DC supply; hence, system is more stable reliable. microgrid has a higher power efficiency than AC microgrid. Energy storage system...

This paper reviews state-of-the-art architectures for galvanically isolated DC–DC converters with data transmission low-power applications. Such applications do not have stringent requirements, in terms of power efficiency, but ask very compact, highly integrated implementations. To this aim, architecture simplicity is crucial, especially when and/or output regulation are required. Since the bo...

social learning and knowledge generation are two key factors to achieve successful natural resources co-management. social learning can be beneficial by broadcasting and transmitting experiences and problem solving ideas in a group of people. social learning networks can transmit knowledge and experiences from one node to another in the network. social learning can produce a suitable learning a...

For battery-powered electronic products, one way to extend battery life is to use a versatile step-up/step-down DC-DC converter. A new versatile step-up/step-down switched-capacitor-based converter structure is proposed, and its efficiency is analyzed. In the step-down case, the efficiency is the same as, or even better than the efficiency of linear regulators. key words: DC-DC converter, switc...

Single Crystals of Nd1−xCa1+xMnO4 have been prepared by the traveling floating-zone method, and possible evidence of a charge -orbital density wave in this material presented earlier [PRB68,092405 (2003)] using High Resolution Electron Microscopy [HRTEM] and Electron Diffraction [ED]. In the current note we present direct evidence of charge-orbital ordering in this material using heat capacity ...

The C-type lectins DC-SIGN and DC-SIGNR efficiently bind human immunodeficiency virus (HIV) and simian immunodeficiency virus (SIV) strains and can transmit bound virus to adjacent CD4-positive cells. DC-SIGN also binds efficiently to the Ebola virus glycoprotein, enhancing Ebola virus infection. DC-SIGN is thought to be responsible for the ability of dendritic cells (DCs) to capture HIV and tr...