Search
Now showing items 611-620 of 645
Raman spectroscopy of the Dukhan sabkha: identification of geological and biogeological molecules in an extreme environment
(
The Royal Society
, 2010 , Article)
The characterization of minerals and biogeological deposits in a terrestrial Arabian sabkha has a direct relevance for the exploration of Mars since the discovery by the NASA rovers Spirit and Opportunity of evaporate ...
المقاربات الشرعيَّة المعاصرة للمفاهيم والموضوعات السياسيَّة - الجلسة الثانية : الأطر/ القواعد المنهجية الحاكمة للمقاربة الشرعية للموضوع السياسي
(
مركز ابن خلدون للعلوم الإنسانية والاجتماعية - جامعة قطر
, 2019 , Video)
الملخص : أصل هذا الفيديو الجلسة الثانية من ندوة علميّة دوليّة ب تاريخ14 سبتمبر 2019م بعنوان: "المقاربات الشرعيّة المعاصرة للمفاهيم والموضوعات السياسيّة: قراءة في المنهج"، نظمها مركز ابن خلدون للعلوم الإنسانية والاجتماعية ...
PAH concentrations and exposure assessment from house dust retained in air-conditioning filters collected from Greater Doha, Qatar
(
Springer Netherlands
, 2019 , Article)
Polycyclic aromatic hydrocarbons (PAHs) bound in dust retained in air-conditioning unit filters from 13 households in Greater Doha, Qatar, were quantified using GC–MS spectrometry. The median concentrations of ∑16PAH and ...
Age, growth, population dynamics and stock status of Perna perna in Omani waters
(
Triveni Enterprises
, 2018 , Article)
Aim: Population parameters such as growth, recruitment pattern, mortality, exploitation rate and the length-weight relationship were investigated for the brown mussel, Perna pernain Omani waters. Methodology: Monthly ...
Effects of bottom substratum on survival and growth of early juveniles of blue swimming crab, Portunus pelagicus (Linnaeus, 1758) in captivity
(
Triveni Enterprises
, 2018 , Article)
Aim : Cannibalism remains a limiting factor during the nursery culture of crabs. This study was undertaken to improvetherearingtechniquesbyinvestigating theimpactofbottom substratum on crablet survival and growth. The ...
Urban Traffic Monitoring and Modeling System: An IoT Solution for Enhancing Road Safety
(
Institute of Electrical and Electronics Engineers Inc.
, 2019 , Conference Paper)
Qatar expects more than a million visitors during the 2022 World Cup, which will pose significant challenges. The high number of people will likely cause a rise in road traffic congestion, vehicle crashes, injuries and ...
Photochemical grafting of polysulfobetaine onto polyethylene and polystyrene surfaces and investigation of long-term stability of the polysulfobetaine layer in seawater
(
John Wiley and Sons Ltd
, 2018 , Article)
Low-density polyethylene (LDPE) and polystyrene (PS) films with hydrophilic surface were prepared by photochemical grafting of sulfobetaine-based copolymer containing photolabile moiety, and long-term stability of the ...
EFFECT OF COMPATIBILIZER ON MECHANICAL AND PHYSICAL PROPERTIES OF GREEN COMPOSITES BASED ON HIGH DENSITY POLYETHYLENE AND DATE PALM FIBER
(
DEStech Publications
, 2013 , Conference Paper)
Date palm leaves and wood are common wastes in the middle east. These natural fibers can be used as additives for polymers to develop new desired properties; they also have important economic and environmental advantages. ...
Joint replenishment model for multiple products with substitution
(
Elsevier Inc.
, 2016 , Article)
We extend the classical economic order quantity model to address the joint replenishment of multiple products under substitution. The proposed model optimizes ordering quantities for each product under substitution effects ...
Effect of Trace 100 vppm H2S on the Corrosion Behaviour of Plain Carbon and Microalloyed Steels in a Predominant Sweet Environment in High Flow Regime
(
Hamad bin Khalifa University Press (HBKU Press)
, 2018 , Conference Paper)
We investigate the effects of the presence of trace (100 vppm) H2S on the corrosion behaviour of plain carbon steel and its various micro-alloyed counterparts in a CO2 saturated (sweet) brine (0.5 M NaCl) environment, in ...