Wind energy is presently the fastest growing renewable energy source in the world. However, the industry still experiences premature turbine component failures, which lead to increased operation and maintenance (O&M) costs and subsequently, increased cost of energy (COE). To make wind power more competitive, it is necessary to reduce turbine downtime and increase reliability. Condition monitori...

in many hydroelectric dams, when the inflows are greater than the demand for energy, a portion of the water that could be used to generate electricity is diverted to the spillway and literally wasted. this energy,designated as “spilled turbinable energy”, could be used advantageously to generate other products or an energy vector that could be stored for later use, since in these situations the...

Nowadays, hybrid renewable systems can be the best solution for meeting electricity demand, especially where grid extension and environmental issues are important. This study aimed to find combination of typical components used in East Java, Indonesia. In this regard, four types photovoltaic (PV) panels, wind turbines, two batteries were selected, HOMER software simulated all possible combinati...

The main di culty in the implementation of most standard implicit Runge-Kutta (IRK) methods applied to (sti ) ordinary di erential equations (ODE's) is to e ciently solve the nonlinear system of equations. In this article we propose the use of a preconditioner whose decomposition cost for a parallel implementation is equivalent to the cost for the implicit Euler method. The preconditioner is ba...

Renewable energy solutions play a crucial role in addressing the growing demands while mitigating environmental concerns. This study examines techno-economic viability and sensitivity of utilizing solar photovoltaic/polymer electrolyte membrane (PEM) fuel cells (FCs) to meet specific power NEOM, Saudi Arabia. The novelty this lies its innovative approach analyzing optimizing PV/PEMFC systems, a...

Asha Vellaikal y;z y Information Sciences Laboratory Hughes Research Laboratories 3011 Malibu Canyon Road Malibu, CA 90265-4799 e-mail: [email protected] C.-C. Jay Kuo z z Integrated Media Systems Center Department of Electrical Engineering-Systems University of Southern California Los Angeles, CA 90089-2564 e-mail: [email protected] ABSTRACT Processing images directly in the compressed dom...

We consider elastic reflection and transmission of electrons by a disordered system characterized by a 2N ×2N scattering matrix S. Expressing S in terms of the N radial parameters and of the four N×N unitary matrices used for the standard transfer matrix parametrization, we calculate their probability distributions for the circular orthogonal (COE) and unitary (CUE) Dyson ensembles. In this par...

This study aims to explore the relation between pre and post adoption of Extensible Business Reporting Language (XBRL) cost equity capital in Indonesian-listed firms. The examines 59 listed companies for four years, including two years before (2014-2015) after (2016-2017) XBRL Indonesia. By comparing periods, multiple regression analysis results will provide valuable information related stakeho...

We explore a large sample of analysts' estimates the cost equity capital (CoE) to evaluate their usefulness as expected return proxies (ERP). find that CoE are significantly related firm's beta, size, book-to-market ratio, leverage, and idiosyncratic volatility but not other risk proxies. Even after controlling for popular predictors, incrementally predict future stock returns. This predictive ...