Intermittent nature of wind power faced ISO and power producers with new challenges. Wind power uncertainty has increased the required reserve capacity and deployment reserve. Consequently, large-scale wind power generation increases ISO costs and consequently reserve prices. On the other hand, since wind power producers are price taker, large-scale wind power generation decreases residual dema...

forest reserves are one of the most important approaches in ecosystem management in iran. in order to determine the effects of reserve management on plants diversity (woody plants and ground flora) in three zones (core zone, buffer zone, and transmission zone of chamhesar pear forest reserve), we mapped land form units. then 18 main sampling units (20×50=1000 m2) distributed randomly were chose...

The shipping industry is going through a period of technology transition that aims to increase the use carbon-neutral fuels. There significant trend vessels being ordered with alternative fuel propulsion. Shipping’s future market will be more diverse, reliant on multiple energy sources. One very promising means meet decarbonisation requirements operate ships sustainable electrical by integratin...

The generalized Killing equations and the symmetries of Taub-NUT spinning space are investigated. For spinless particles the Runge-Lenz vector defines a constant of motion directly, whereas for spinning particles it now requires a non-trivial contribution from spin. The generalized Runge-Lenz vector for spinning Taub-NUT space is completely evaluated. PACS. 04.20.Me Conservation laws and equati...

The objective of Multi-area economic dispatch (MAED) is to determine the generation levels and the interchange power between areas that minimize fuel costs, while satisfying power balance and generating limit and transmission constraints. If an area with excess power is not adjacent to a power deficient area, or the tie-line between the two areas is at transmission limit, it is necessary to fin...

Under the constraints of fossil-fuel reserves depletion and climate change, expansion intermittent renewable generation creates a lot power integration issues which undeniably disturb overall system stability. Optimally planned, electricity storage systems are capable managing variability uncertainty energy sources, guaranteeing balance ensuring feasible economical operation. Here, outcomes der...

This study presents a method for fabrication of ultrafine polymeric nanofibers as well as nano/micro particles utilizing centrifugal and electrostatic forces simultaneously. To reduce the diameter and variety of nanofibers produced from solid state polymerized PA66, a unique electrocentrifuge spinning device was utilized with a rotating nozzle and collector, while the fabrication process (spinn...

background: reduced ovarian reserve has been known to predict poor ovarian response and poor success rates in infertile women undergoing assisted reproductive technology. ovarian reserve also decreases with age but the rate of decline defers from a woman to another. the aim of this study was to detect any difference in ovarian reserve as measured by basal serum fsh and amh between matched cohor...

In parallel and distributed computing environments, threads (or processes) share access to variables and data structures. To assure consistency during updates, locks are used. When a thread attempts to acquire a lock but nds it busy, it must choose between, spinning, which means repeatedly attempting to acquire the lock in the hope that it will become free, and blocking, which means suspending ...