تصفح Research Units حسب العنوان
السجلات المعروضة 2871 -- 2890 من 4687
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Oblique and rotation double random forest
( Elsevier Ltd , 2022 , Article)Random Forest is an ensemble of decision trees based on the bagging and random subspace concepts. As suggested by Breiman, the strength of unstable learners and the diversity among them are the ensemble models’ core strength. ... -
Observations of hydrographic properties, dissolved oxygen (DO) and chlorophyll-A (Chl-a) (phytoplankton biomass) within the exclusive economic zone (EEZ) of Qatar (central Arabian Gulf)
( Hamad bin Khalifa University Press (HBKU Press) , 2015 , Conference Paper)In situ observations of physical, chemical, and biological parameters of the Qatari water column were conducted to understand the temporal (seasonal) and spatial (regional) variability in the vertical and horizontal ... -
Observed variability in physical and biogeochemical parameters in the central Arabian Gulf
( Elsevier , 2021 , Article)In situ measurements of physical and biogeochemical variables were conducted along a transect in the Exclusive Economic Zone (EEZ) of Qatar during late summer (September 2014) and winter (January 2015) to investigate their ... -
Occupational changes during the COVID-19 lockdown in Jordan
( Taylor and Francis , 2021 , Article)Background: Measures to limit the spread of COVID-19 have disrupted the lives of countless millions of individuals worldwide. Objective: To explore the experiences of occupational disruption and changing social roles among ... -
Occurrence, origin and potential ecological risk of dissolved polycyclic aromatic hydrocarbons and organochlorines in surface waters of the Gulf of Gabès (Tunisia, Southern Mediterranean Sea)
( Elsevier , 2022 , Article)We investigated the occurrence, origin, and potential ecological risk of dissolved polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyl (PCBs) and organochlorine pesticides (OCPs) in 27 surface water samples ... -
Octadecyltrichlorosilane-Modified Superhydrophobic-Superoleophilic Stainless Steel Mesh for Oil-Water Separation
( John Wiley and Sons Inc , 2021 , Article)Recently, oil-water separation has become an important topic due to its increasing commercial demand. Here, in this study, a simple technique to prepare superhydrophobic-superoleophilic mesh for oil-water separation is ... -
Oil for Food: The Global Food Crisis and the Middle East
( Cambridge University Press (CUP) , 2018 , Book Review)its hard-won gains from Raqqa to Mosul, victory for the United States and its allies in this clash of ideas and values in the deserts of the Middle East is far from assured” (319) -
Oil pollution in the Eastern Arabian Sea from invisible sources: A multi-technique approach
( Elsevier Ltd , 2019 , Article)The Eastern Arabian Sea (EAS) is affected by oil pollution, as often evidenced by the presence of tarballs along the West Coast of India (WCI). Tarball samples collected during May 2017 along the Goa coast were subject to ... -
Oil Spill Index (OSI) to Sentinel-2 satellite data: QU in International Contribution
( Qatar University Press , 2021 , Poster)An Oil Spill Index (OSI = (B3+B4)/B2) was developed and applied to Sentinel-2 optical satellite data of the European Space Agency (ESA) to map marine oil spills using spectral absorption characters of spectral bands of the ... -
Oil-polluted groundwater in central and west Iraq as indicator of potential new hydrocarbon plays
( Taylor and Francis Ltd. , 2023 , Article)The old land of Iraq is characterized by the presence of many oil seepages that date back to the Babylonian time. During the last few years, the country has witnessed an accelerating pattern of earthquakes that may have ... -
Oil-Water Separation by ZnO-Based Superhydrophobic PU Sponges
( Wiley-VCH Verlag , 2020 , Article)Continuous oil–water separation is not only an important topic for scientific research but also for practical applications to clean oil from industrial oily wastewater and oil-spill pollution. In this work, polyurethane ... -
Oilfield scale formation and chemical removal: A review
( Elsevier B.V. , 2018 , Article Review)In oil and gas industry operations, scale deposition on the surface and subsurface production equipment can cause different problems such as formation damage, loss in production, pressure reductions, and premature failure ... -
Oleic acid-grafted chitosan/graphene oxide composite coating for corrosion protection of carbon steel
( Elsevier Ltd , 2016 , Article)An anticorrosion coating film based on the formation of nanocomposite coating is reported in this study. The composite consisted of chitosan (green matrix), oleic acid, and graphene oxide (nano filler). The nanocomposite ... -
Olive agroforestry shapes rhizosphere microbiome networks associated with annual crops and impacts the biomass production under low-rainfed conditions
( Frontiers Media , 2022 , Article)Agroforestry (AF) is a promising land-use system to mitigate water deficiency, particularly in semi-arid areas. However, the belowground microbes associated with crops below trees remain seldom addressed. This study aimed ... -
Olive Leaves Extract and Oleuropein Improve Insulin Sensitivity in 3T3-L1 Cells and in High-Fat Diet-Treated Rats via PI3K/AkT Signaling Pathway
( Hindawi Limited , 2023 , Article)Olive leaves extracts are known to exert potential pharmacological activities especially, antidiabetic and antiobesity. This study explores the anti-insulin resistant effect of olive leaves extracts and oleuropein in 3 ... -
Olive oil by‑product’s contribution to the recovery of phenolic compounds from microalgal biomass: biochemical characterization, anti‑melanogenesis potential, and neuroprotective effect
( Springer , 2022 , Article)Recently, the use of microalgae in the treatment of olive mill wastewater as a safe method for reducing pollutants has gained more attention. However, the contribution of such by-product to the improvement of the pharmacological ... -
Oman's independent foreign policy
( Taylor and Francis , 2016 , Book chapter)This chapter examines and explains the nature of Oman’s foreign policy. In doing so, it will apply three levels of foreign policy analysis, including the societal level, the state level, and the system level. The chapter ... -
Oman: Food Security in Times of Uncertainty
( Gulf Studies Center , 2020 , Article)As the protest illustrated, the affordability of food has been an issue of concern among Omani citizens. As a result of its arid climate, the salinity of the country's soil and water scarcity, there are restrictions to the ... -
On Minimizing TCP Traffic Congestion in Vehicular Internet of Things (VIoT)
( Springer Nature , 2022 , Article)The performance of end-to-end wireless link congestion control algorithm in the vehicular internet of things network is plagued by the inherent limitations of spurious rate control initiation, slow convergence time, and ... -
On secure communication over the Z-Channel
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)The discrete memoryless Z-Channel (DM-ZC) with a confidential cross-message is considered. Three messages are transmitted; encoder 1 transmits one message to be decoded by decoder 1. Encoder 2 transmits two messages, the ...
