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Qatar Foundation Annual Research Forum Volume 2012 Issue 1
- Conference date: 21-23 Oct 2012
- Location: Qatar National Convention Center (QNCC), Doha, Qatar
- Volume number: 2012
- Published: 01 October 2012
381 - 400 of 469 results
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Electric properties and surface structure of titanium dioxide for solar cells
More LessBackground: Titanium dioxide (TiO2) films have been extensively studied due to their interesting electrical and optical properties. They have the potential to be used for a number of electronic device applications such as dye sensitized photovoltaic cells and also anti-reflective coatings, gas sensors, electrochromic displays and planer wave guides. Objective: Measurement of the electric properties and surface structure analy Read More
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Effect of salinity on carbon and sulfur cycles in Umm Alhool sabkha microbial mat ecosystem in Qatar
Authors: Mohammad Al-Najjar, Roda Al-Thani and Abdul Monem Al RaeiMicrobial mats are only present under extreme conditions, where grazing by higher organisms is limited. Therefore, microbial mats may provide insight into extraterrestrial life, due to their adaptations to extreme temperatures, desiccation or salinity. They are faced with a diurnal cycle with variable length based on their location, which exposes them to extreme salinity conditions (i.e., water withdrawal and high evaporation). Read More
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Numerical analysis of the ship motion exerted by interior sloshing on the LNG carriers
Authors: A.M.S. Hamouda and Gang XuLiquefied natural gas (LNG) carriers have played and will continue to play a key role in ocean gas transportation with the increasing demand for energy. Safe operation of LNG carriers requires the knowledge of global and local fluid pressures imposed by the sloshing liquid. As LNG carriers are required to operate in different environmental conditions, safety is a primary consideration in such operations. LNG carriers are often su Read More
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Development of new lead-free Sn-2.5Mg solder for electronic packaging industries
Authors: Md Ershadul Alam, Manoj Gupta and AbdelMagid Salem HamoudaThe increasing use of lead-free solders is driven by the direct threat of strict legislation to ban the use of lead-based solders in electronics manufacturing industries by the USA, Japan and countries under the European Union. An additional driver is the market change due to public 'green awareness'. Therefore, establishing a lead-free solder has become a critical issue. In recent years, many attempts are made to develop Read More
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Application of chemically synthesized polyaniline-polystyrene blend as a carbon dioxide gas sensor
Authors: Jolly Bhadra, Noora Al-Thani, Nabil K Madi and Mariam A. Al-MaadeedThe use of conducting polymers as sensing elements in chemical sensors is attracting attention due to their high sensitivity in change of the electrical and optical properties when exposed to different types of gases or liquids. The ease in synthesis of these polymers and sensitivity at room temperature add to the sensors' advantages. This can be of importance particularly considering CO2 sensors that are used in different a Read More
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Date palm fibre as a reinforcement of recycled polymer blend matrix
Authors: Mariam AlMaadeed and PATAN NOORUNNISA KHANAMThis paper investigates for the first time the effect of the amount of Maleic anhydride (MA) on blends of recycled polymers and date palm fibre composites. Recycled low density polyethylene (RLDPE) 20 wt%, recycled high density polyethylene (RHDPE) 40 wt%, and recycled polypropylene (RPP) 40 wt%, blends have been prepared. The recycled polymers, 10 wt% RLDPE, 35 wt% RHDPE and 35 wt% RPP, were used as the po Read More
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Assessment of thermal performances of nanofluids in industrial type heat exchangers
Authors: Jonathan Cox, Anoop Kanjirakat and Reza SadrApplication of nanotechnology in industrial applications is receiving increased attention this century. Nanotechnology could be used to improve performances of heat exchangers, which are widely used in industrial applications by augmenting heat transfer characteristics of working fluids. Nanofluids, which are engineered colloidal suspensions consisting of nano-sized particles (less than 100 nm) dispersed in a base fluid, ha Read More
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The possibility to lower building energy consumptions in Qatar
Authors: Mohamad Kharseh, Ferri Hassani and Mohammed Al KhawajahMost global energy comes from fossil fuel. Currently, there is a strong belief that climate change is anthropogenic and attributed to fossil fuel consumption. Heating and cooling systems account for half of global energy consumptions. In hot and underdeveloped countries such as Qatar, the share of air conditioning systems is expected to be even more than half the national energy consumption. This provides the challenge to Read More
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Characterization of Qatari untreated and treated male and female date palm leaves
Authors: Mariam AlMaadeed, Ramazan Kahraman, P. Noorunnisa Khanama and Somaya Al-MaadeedThis paper describes for the first time the difference in species reactions to the treatment type of date palm fiber. Male and female date palm leaves from two different cultivars--Sheshi female and unknown male--have been considered. Characterization was done for both untreated and NaOH-treated date palm leaves by infrared spectroscopy, thermo gravimetric analysis and scanning electron microscopic techniques. T Read More
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What's up with Qatar? How eustasy and neotectonics influenced the late Pleistocene and Holocene sea-level history of Qatar
Authors: Jeremy Jameson and Christian StrohmengerThe evolution of coastal plains, the present day shape, and surface hydrology of Qatar are related to changes in relative sea level. Several factors acting on different time scales have contributed to sea level changes. These include tectonism and glacioeustasy. The peninsula shape is the surface expression of the Qatar Arch, one of the largest structural features of the Arabian Plate. It plunges northward into the Zagros fo Read More
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Using ambient noise in identifying hydrocarbon reservoirs and aquifers in the Nile delta basin, Egypt
Authors: elsayed fergany and Sylvette Bonnefoy-ClaudetThe Nile delta basin has a rapidly growing population exceeding 40 million with a need for renewable natural sources of energy and water. This study presents a reliable exploration tool for identifying hydrocarbon reservoirs and aquifers in the Nile delta basin using horizontal to vertical (H/V) spectral ratios of ambient noise measurements. More than 100 measurements were taken using broadband portable stations at three p Read More
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Behavior of porous materials under asymmetric dynamic loading
Authors: Sinisa Bugarin and Ratnam PaskaramoorthyBackground and Objectives: Stress concentration around cavities and cracks strongly influence the fracture and fatigue properties of porous materials. Microcracks that form around discontinuities in the material such as cavities link up to form macrocracks leading to substantial degradation of material mechanical properties. The dominant factor aiding the formation of microcracks is the stress concentration. Th Read More
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Nanofluids: Optical properties and its effects in near-wall measurements
Authors: Reza Sadr and Anoop KanjirakatEngineered colloidal suspensions of nano-sized particles in base fluids (nanofluids) have shown promise in heat transfer research as a potential for future heat transfer fluid. However, the conflicting reports on the thermal properties of these fluids necessitate a detailed look into the physical mechanisms behind this enhancement. As heat transfer is a surface phenomenon, near-wall fluid flow and temperature measurements Read More
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Understanding the link between moisture dynamics and microbial activity in mobile dunes
Authors: Sara Abdul Majid, Michel Louge, Anthony Hay and Renee RicherBarchan dunes in southeastern Qatar are relentlessly pushed by northwesterly, shamal, winds. This research aims to understand whether a synergy between moisture retention and microbial growth could be exploited to stop them from upsetting natural habitat as they pass. These mobile dunes in Qatar also constitute a unique test area in which to study mechanisms of desertification. After characterizing the behavior and shape Read More
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Turbulent characteristics of atmospheric surface layer in Qatar
By Reza SadrWind power is one of the world's fastest growing renewable energy sources. Design and performance of wind turbines greatly depend on the atmospheric turbulence on the plant site. Furthermore, turbulent characteristics of the atmospheric boundary layer are of utmost importance in modeling the large-scale meteorological processes, diffusion of atmospheric contaminants, heat transfer and evaporation off of the eart Read More
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Heat wave hazard modelling in Qatar
Background & Objectives: Heat wave hazard modelling is attracting a lot of attention, especially with the onset of climate change and global warming currently taking place. General global climatic models and trends predict that heat waves will increase in frequency, duration, and intensity. Yet, heat wave hazard modelling remains a challenging and imperative problem because of the complexity introduced by natur Read More
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Analysis of CO2 equilibrium data in aqueous solutions of DEA, MDEA and their mixtures using the modified Kent Eisenberg model and the Deshmukh-Mather model
Authors: Abdelbaki Benamor and Abdelwahab AroussiAlkanolamine solutions are widely used for the removal of acid gases such as CO2 and H2S from process streams containing these components in the industries. The technique has been proven to be reliable and has found wide application in many chemical industries such as ammonia production, coal gasification and natural gas processing. In this work, equilibrium data of CO2 absorption in aqueous solutions of single a Read More
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Carbon emission: A global challenge that requires global solutions
More LessThe concentration of CO2 in the atmosphere keeps increasing, relentlessly approaching the critical threshold identified as a point of no return for global warming. Recent research on carbon sequestration revealed that emission reduction targets would be hard to achieve with a single solution, namely underground storage, since a great deal of issues are still outstanding. To name but a few of these, one can cite a legal framew Read More
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Advanced training tools for oil and gas industry personnel
More LessBackground: The pool of experienced oil, gas and chemical plant operators, mechanics and other plant personnel is not keeping pace with demand in active oil and gas hubs like in the State of Qatar. Many individuals new to the oil and gas and related industries are being hired. A premium is being placed on getting these individuals quickly trained and qualified to assume increasing job responsibilities. This places great pressur Read More
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Advanced autonomous gas leak detection techniques
More LessBackground: Existing technologies for detecting gas releases in oil and gas facilities include point and path detectors and leak detection and repair (LDAR) programs. Large networked arrays of point and path detectors are needed to detect gas leaks in oil and gas facilities due the inherent passive nature of these stationary technologies that require gas plume to come in contact with or within the line of sight the detectors. L Read More
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