background and purpose: organizational commitment has been on a downward trend among medical staff in different sections of the health care system. this study aimed to investigate the level of organizational commitment among the nurses engaged in the intensive care units (icus) of mazandaran heart center in sari, iran. methods: this descriptive-analytical study was conducted at the educational ...

We present a new constant round additively homomorphic commitment scheme with (amortized) computational and communication complexity linear in the size of the string committed to. Our scheme is based on the non-homomorphic commitment scheme of Cascudo et al. presented at PKC 2015. However, we manage to add the additive homomorphic property, while at the same time reducing the constants. In fact...

The issue of unit commitment is one of the most important economic plans in power system. In modern and traditional power systems, in addition to being economical of the planning, the issue of security in unit operation is also of great importance. Hence power system operation confronts units’ participation and input considering network security constrains. The issue of units’ participation is ...

The increasing penetration of uncertain generation such as wind and solar in power systems imposes new challenges to the Unit Commitment (UC) problem, one of the most critical tasks in power systems operations. The two most common approaches to address these challenges — stochastic and robust optimization — have drawbacks that prevent or restrict their application to real-world systems. This pa...

This paper introduces a new approach for scheduling security constraint unit commitment (SCUC) including wind farms. Because of uncertainty in wind power production, we tried to develop a new method for incorporating wind power generation in power plant scheduling. For this, wind power generation modeled with unit commitment in a non-linear optimization problem and simulated by submitting diffe...

The Lagrangian relaxationLRbased methods are commonly used to solve the thermal unit commitment UC problem which is an important subject in power system engineering. The main drawback of this group of methods is the difference between the dual and the primal solutions which gives some significant problems on the quality of the feasible solutions. In this paper, a new approach, feasible modified...

The uncertain and variable nature of renewable energy sources in modern power systems raises significant challenges in achieving the dual objective of reliable and economically efficient system operation. To address these challenges, advanced scheduling strategies have evolved during the past years, including the co-optimization of energy and reserves under deterministic or stochastic Unit Comm...

Long-term planning in electric power systems requires simulations of unit commitment (UC) and economic dispatch (ED) for long time periods up to 20 years. Such simulations are conducted with production cost models (PCMs), which involve solving large-scale mixed-integer programming (MIP) problems with a high number of variables and constraints, because of the long planning horizon. We have devel...

<p><strong>Unit commitment (UC) is the scheduling of on-off operation a power plant unit to meet demand for electrical over certain period time in order obtain an economical total cost generation The PL method used and AG optimized using DOE ED problems. results obtained from research that there are still improvements calculation problems load flow constraints can be corrected. comp...