بحث بسيط
السجلات المعروضة 281 -- 290 من 653
Sport at Home, Sport in the World: Evaluating Qatar’s Sports Strategy from Above and Below
(
Springer
, 2021 , Book chapter)
This piece is an overview of actors and policies concerning sport in the nation of Qatar. In recent years, sports have been given high priority in government attempts to raise exposure of the nation internationally. Many ...
Quadratic problems with two quadratic constraints: Convex quadratic relaxation and strong lagrangian duality
(
EDP Sciences
, 2021 , Article)
In this paper, we study a nonconvex quadratic minimization problem with two quadratic constraints, one of which being convex. We introduce two convex quadratic relaxations (CQRs) and discuss cases, where the problem is ...
The state of the knowledge-based economy in the Arab world: cases of Qatar and Lebanon
(
Emerald Group Holdings Ltd.
, 2020 , Article)
Purpose: The purpose of this paper is to examine the current state of the knowledge-based economy in two distinctive case studies in the Arab World: Qatar and Lebanon. Based on five aspects of the knowledge-based economy ...
Rethinking unsustainability in Tunisia's sustainable development
(
GIGA German Institute of Global and Area Studies
, 2020 , Article)
This article problematises sustainable development in Tunisia through the lens of regional (under)development. Decades of accumulated imbalances between the country's coastal (Sahel) and southern/interior regions stand as ...
The Reliability, Validity and Normative Scores of the Bene-Anthony Family Relations Test for Use With Arab Children
(
Frontiers Media S.A.
, 2021 , Article)
Background: The Bene-Anthony Family Relations Test (BAFRT) is one of the most widely used measures of family dynamics seen from a child's perspective. However, the most common issue surrounding this test is the lack of ...
The generalized trust-region sub-problem with additional linear inequality constraints-Two convex quadratic relaxations and strong duality
(
MDPI AG
, 2020 , Article)
In this paper, we study the problem of minimizing a general quadratic function subject to a quadratic inequality constraint with a fixed number of additional linear inequality constraints. Under a regularity condition, we ...
A image encryption algorithm based on chaotic Lorenz system and novel primitive polynomial S-boxes
(
Springer
, 2021 , Article)
We have proposed a robust, secure and efficient image encryption algorithm based on chaotic maps and algebraic structure. Nowadays, the chaotic cryptosystems gained more attention due to their efficiency, the assurance of ...
Observer design for hyperbolic PDEs system with application to a fixed-bed chemical reactor model
(
Institute of Electrical and Electronics Engineers Inc.
, 2020 , Conference Paper)
This work is devoted to the development of an optimal infinite-dimensional Luenberger observer for a system of hyperbolic PDEs. For this purpose, the duality fact linking the control design and the observer design is used. ...
Highly dispersed Pt nanoparticles on ultrasmall EMT zeolite: A peroxidase-mimic nanoenzyme for detection of H2O2 or glucose
(
Elsevier Inc.
, 2020 , Article)
In past decade, Pt-based nanomaterials as peroxidase mimics have attracted much attention for H2O2 and glucose detection. However, easy aggregation of Pt nanoparticles (Pt NPs) greatly decreases their peroxidase-like ...
Biodiversity and possible utilization of halophytes in Qatar
(
Springer International Publishing
, 2021 , Book chapter)
Climate change, nature destruction, food security, and accessibility to fresh water are all the most concerning world issues facing humanities. There are many solutions to minimize the adverse effects of such environmental ...