Browsing by Author "Khalifa, Ahmed"
Now showing items 1-5 of 5
-
Silver Nanoparticles-Decorated Titanium Oxynitride Nanotube Arrays for Enhanced Solar Fuel Generation
Soliman, Khaled A.; Zedan, Abdallah F.; Khalifa, Ahmed; El-Sayed, Hany A.; Aljaber, Amina S.; AlQaradawi, Siham Y.; Allam, Nageh K.... more authors ... less authors ( Nature Publishing Group , 2017 , Article)We demonstrate, for the first time, the synthesis of highly ordered titanium oxynitride nanotube arrays sensitized with Ag nanoparticles (Ag/TiON) as an attractive class of materials for visible-light-driven water splitting. ... -
Systemic risk for financial institutions in the major petroleum-based economies: The role of oil
Khalifa, Ahmed; Caporin, Massimiliano; Costola, Michele; Hammoudeh, Shawkat ( International Association for Energy Economics , 2020 , Article)We examine the relationship between oil returns and systemic risk of financial institutions in major petroleum-based economies. By estimating ΔCoVaR, we observe the presence of remarkable increases in risk levels during ... -
The relationship between oil prices and rig counts: The importance of lags
Khalifa, Ahmed; Caporin, Massimiliano; Hammoude, Shawkat ( Elsevier B.V. , 2017 , Article)This study deals with a timely and relevant issue in the oil market in the wake of the recent drastic drop in oil prices, which is the relationship between changes in oil prices and changes in rig counts, while accounting ... -
Understanding Water Consumption in Qatar: Evidence From a Nationally Representative Survey
Al-Maadid, Alanoud; Akesson, Jesper; Bernstein, David H.; Chakravarti, Jayani; Khalifa, Ahmed ( Taylor and Francis Ltd. , 2022 , Article)This paper presents an analysis of a nationally representative (n = 1,002) telephone survey conducted in Qatar on habits, perceptions, and religious attitudes related to water use. Our empirical analysis yields three main ... -
Understanding Water Consumption in Qatar: Evidence From a Nationally Representative Survey
Al-Maadid, Alanoud; Akesson, Jesper; Bernstein, David H.; Chakravarti, Jayani; Khalifa, Ahmed ( Taylor & Francis , 2022 , Article)This paper presents an analysis of a nationally representative (n = 1,002) telephone survey conducted in Qatar on habits, perceptions, and religious attitudes related to water use. Our empirical analysis yields three main ...