A feedback vertex set of an undirected graph is a subset of vertices that intersects with the vertex set of each cycle in the graph. Given an undirected graph G with n vertices and weights on its vertices, polynomial-time algorithms are provided for approximating the problem of finding a feedback vertex set of G with smallest weight. When the weights of all vertices in G are equal, the performa...

In this article using comparative multi-purpose algorithm of PSO, optimum capacity of new resources and their spinning storage is defined. Spinning reserve requirements and optimized to maximize profit per unit is determined according to uncertainty. In fact by increasing the level of cost reservation, power supply increases but penalty of blackout decreases. In this paper in has been tried to ...

Jaringan power listrik kapal untuk kegiatan operasional pelayaran memiliki karakteristik 3 phase 450 VAC 60 Hz, sumber diproduksi generator dengan kapasitas 562 KVA. Gangguan pada jaringan adalah undervoltage dan overvoltage, kondisi ini menyebabkan terjadinya voltage collapse atau blackout. Voltage tidak boleh terjadi sistem power, karena itu banyak penelitian terdahulu membahas berusaha menga...

Blackouts in recent years have demonstrated that a reliable and secure power system is a key component of an efficient economy. Therefore control devices such as flexible AC transmission system devices (FACTS) are placed in the system and utilised to improve the security of the system. A method to determine appropriate settings for these devices is optimal power flow control. As the area of inf...

✼ Recom Technologies ABSTRACT— Space missions have historically relied upon a large ground staff, numbering in the hundreds for complex missions, to maintain routine operations. When an anomaly occurs, this small army of engineers attempts to identify and work around the problem. A piloted Mars mission, with its multiyear duration, cost pressures, halfhour communication delays and two-week blac...

SUZY STOKES, NICK S. KALSON, MARK EARL, ADAM G. WHITEHEAD, IAN TYRRELL-MARSH, HANNAH FROST, ANDREW DAVIES Clinical Education Centre, University Hospital of North Staffordshire, Stoke-on-Trent ST4 6QG, UK Manchester University Medical School and MARS—Manchester Altitude Research Society, The Medical School, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PL, UK Hope Hos...

After 9 years, Austroads has published new guidelines for fitness to drive. The guidelines have a preamble, which includes a legal disclaimer denying any culpability for those who designed the guidelines. They also warn of the legal responsibility for health professionals to satisfy their obligations, the need to be current with both relevant medical and legal expectations and if in doubt to se...

Historic data from many countries demonstrate that on average no more than 50-70% of the uranium in a deposit could be mined. An analysis of more recent data from Canada and Australia leads to a mining model with an average deposit extraction lifetime of 10±2 years. This simple model provides an accurate description of the extractable amount of uranium for the recent mining operations. Using th...