Qatar Foundation Annual Research Forum Volume 2013 Issue 1

This paper discusses a reduced switch count topology of multi-level three-phase voltage source inverter for variable speed drive applications. In the investigated topology, the number of power switching devices and the number of capacitor/neutral voltage clamping devices are drastically reduced when compared with the existing Neutral Point Clamped (NPC), Flying capacitor (FLC) and Cascaded H-bridge (CHB) multilevel s Read More

This paper aims to provide an in-depth overview of all the findings presented in recent research papers available on wind turbine emulation design methodologies. It discusses about the existing possibilities for developing the emulator and ultimately uses the suitable method for building a wind turbine emulator keeping all those issues discussed in previous research papers in mind. A wind emulator system is developed to investi Read More

Isolation and characterization of fungal pathogens causing date palm black scorch and false smut in Qatar Fatima A. Al-Naemi1, Resna K. Nishad1, Talaat A. Ahmed1 and Osman Radwan2 1Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, Qatar 2Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, IL, USA The abi Read More

Crude oil and gas products transported using pipelines systems is safe and economical all over the the world. Nonetheless, such pipelines can still be subject to various degrees of failure and degradation generating hazardous consequences and severe environmental damages. As a result, it is important for these pipelines to be effectively monitored and assessed for optimal operation. Many models have been developed to pre Read More

The matrix converters are silicon based converters without bulky and expensive DC link capacitors other than its counterpart voltage source inverter (VSI) converters as an ideal voltage source and feed to ideal current source. Power electronic converters are a typical source of harmonic currents and during each switching cycle, the matrix converters produce unwanted harmonics and this will inject back to the AC mains. Read More

The GCC region has become a hub of major economic growth in the world. It is providing financial support and incentives to the GCC countries. Hereby, it has witnessed population growth and large scale industrial activities in the GCC countries. This has led to increased demand for electricity. Current demand for GCC power consumption is about 60 GW and it is projected that it will reach 180 GW within next 25 years Read More

Petroleum Geochemistry is an established science to study the formation, migration, accumulation and alteration of petroleum. It is routinely applied to understand the exploration and recovery of oil and gas, both for "conventional" hydrocarbons as well as "unconventional" resources like shale gas. Due to its diverse origins and subsequent alteration processes during migration and accumulation processes, many hydrocar Read More

Date palm (Phoenix dactylifera) is one of the most distributed and well-adapted fruit crops in the Middle East, and plays an important role in the history and diet of the Arab world. Dates constitute the primary exportable agricultural product in Qatar and current efforts are being made to improve its production. Over the years, clonal propagation has been used to maintain selected varieties with desirable morphological tra Read More

The desert climate of Qatar presents numerous challenges to the sustainable and secure provision of food for its increasing number of residents. This research looks at how the producing of food can be implemented in a resource efficient and sustainable way, using systems thinking to maximize the quality and quantity of food produced and to minimize the energy and resources consumed. Approached from a spatial a Read More