In the United States, mitigating the adverse impacts of flooding has increasingly become the responsibility of local decision-makers. Despite the importance of understanding how and why flood mitigation techniques are implemented at the local level, few large-scale, empirical studies have been conducted in recent years. Our study examines the current status and extensiveness of flood mitigation...

SQL injection attacks (SQLIA) still remain one of the most commonly occurring and exploited vulnerabilities. A considerable amount of research concerning SQLIA mitigation techniques has been conducted with the primary resulting solution requiring developers to code defensively. Although, defensive coding is a valid solution, the current market demand for websites is being filled by inexperience...

the harmonic index h(g) , of a graph g is defined as the sum of weights 2/(deg(u)+deg(v)) of all edges in e(g), where deg (u) denotes the degree of a vertex u in v(g). in this paper we define the harmonic polynomial of g. we present explicit formula for the values of harmonic polynomial for several families of specific graphs and we find the lower and upper bound for harmonic index in caterpill...

Interaction of the third harmonic magnetic field with the third harmonic current in a five-phase synchronous reluctance motor (SynRM) can produce additional torque. However, it is still not clear about the SynRM power factor and its impact on the associated power converter because of the third harmonic components. Using time-stepping finite-element method, a mathematical model of the SynRM, whi...

Unregulated utilization of renewable generation including residential photovoltaic (PV) systems can have a significant impact on load characteristics in distribution networks. For improving PV generation capabilities, power quality aspects have to be coordinated with present load characteristics. This paper discusses the harmonic content of PV generation and the influence to power quality indic...

Recently wide spread of power electronic equipment has caused an increase of the harmonic disturbances in the power systems. The nonlinear loads draw harmonic and reactive power components of current from ac mains. Current harmonics generated by nonlinear loads such as adjustable speed drives, static power supplies and UPS. Thus a perfect compensator is required to avoid the consequences due to...

Jussi Karttunen Current Harmonic Compensation in Dual Three-Phase Permanent Magnet Synchronous Machines Lappeenranta 2017 80 pages Acta Universitatis Lappeenrantaensis 751 Diss. Lappeenranta University of Technology ISBN 978-952-335-097-7, ISBN 978-952-335-098-4 (PDF) ISSN-L 1456-4491, ISSN 1456-4491 Dual three-phase electric machines can bring significant benefits over conventional threephase ...

Because of installation for local consumers and since it is free of all contaminations, connecting photovoltaic cells to the grid via single-phase inverter is significantly on the rise. In this paper, a new simple current control is proposed for a single-phase grid-connected voltage source inverter. Using the PQ theory and modelling a single-phase system as an unbalanced three-phase system, a m...

this paper presents a new control methodology for active power filters that provide an adaptive online harmonic estimation with partial and selective harmonic reduction schemes, which has been implemented within an integrated controller. the proposed approach is to provide partial and selective reduction of those individual harmonics which exceed the recommended levels as set by regulatory bodi...