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Zakaria El Gataa,Samira El Hanafi,Fadil Basheer,Zakaria Kehel,Yassin bouhouch,Khalil El Messoadi,Kenza Eddakir,Nawel Ladraa,Karima Samir,Wuletaw Tadesse 한국작물학회 2021 Journal of crop science and biotechnology Vol.24 No.4
Abiotic stress, especially drought and heat, afects cereal yields and wheat production worldwide, more particularly in West and South Asia, North Africa, and sub-Saharan Africa. The present study was carried out on 229 spring bread wheat (Triticum aestivum L.) genotypes from the International Center for Agricultural Research in Dry Areas (ICARDA) to identify the genomic region and marker-trait associations (MTA) responsible for drought and heat tolerance. The study was carried out in three diferent locations, Merchouch station (Morocco), Sids station (Egypt), and Wadmadani station (Sudan) over a period of 2 years (2018 and 2019). A genome-wide association study (GWAS) was performed using the mixed linear model (MLM) and 13,698 DArTseq markers were used for genotyping. Linkage disequilibrium revealed that 1914 pairs of markers mapped on the B sub- genome, followed by D and A sub-genomes with 1745 and 1726 paired markers, respectively. A total of 342 MTAs (P<0.05) and 78 genes were identifed in the three environments, of which 134 MTAs were recorded at Sids station and 128 and 80 MTAs at Wadmadani station and Merchouch station. The markers 822,842, 196,565 and 753,901 were signifcantly correlated with grain yield under drought, heat and yield potential stations Morocco, Sudan, and Egypt, respectively. The markers and candidate genes identifed in this study have potentials for marker-assisted selection to develop high yielding wheat genotypes with resistance to heat and drought stresses.
Zakaria Mohd Aizuddin,Abdul Razab Mohammad Khairul Azhar,Adenan Mohd Zulfadli,Ahmad Muhammad Zabidi,Tajudin Suffian Mohamad,Samson Damilola Oluwafemi,Abdul Aziz Mohd Zahri 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.1
Ceramic materials are being explored as alternatives to toxic lead sheets for radiation shielding due to their favorable properties like durability, thermal stability, and aesthetic appeal. However, crafting effective ceramics for radiation shielding entails complex processes, raising production costs. To investigate local viability, this study evaluated Malaysian ceramic tiles for shielding in diagnostic X-ray rooms. Different ceramics in terms of density and thickness were selected from local manufacturers. Energy Dispersive X-ray Fluorescence (EDXRF) and X-ray Fluorescence (XRF) characterized ceramic compositions, while Monte Carlo Particle and Heavy Ion Transport code System (MC PHITS) simulations determined Linear Attenuation Coefficient (LAC), Half-value Layer (HVL), Mass Attenuation Coefficient (MAC), and Mean Free Path (MFP) within the 40–150 kV energy range. Comparative analysis between MC PHITS simulations and real setups was conducted. The C3–S9 ceramic sample, known for homogeneous full-color structure, showcased superior shielding attributes, attributed to its high density and iron content. Notably, energy levels considerably impacted radiation penetration. Overall, C3–S9 demonstrated strong shielding performance, underlining Malaysia’s potential ceramic tile resources for Xray room radiation shielding.
Zakaria, M. 한국산업정보응용수학회 2002 한국산업정보응용수학회 Vol.6 No.2
The influence of unsteady boundary layer magnetohydrodynamic flow with thermal relaxation of perfectly conducting fluid, past a semi-infinite plate, is considered. The governing non linear partial differential equations are solved wing the method of successive approximations. This method is used to obtain the solution for the unsteady boundary layer magnetohydrodynamic flow in the special form when the free stream velocity exponentially depends on time. The effects of Alfven velocity α on the velocity is discussed, and illustrated graphically for the problem.
Zakaria Boulghasoul,Zineb Kandoussi,Abdelhadi Elbacha,Abdelouahed Tajer 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.5
In this paper we present a new improved sensorless vector control of induction motor based on an improved adaptive Luenberger observer. The proposed observer is designed to estimate both speed and motor parameters from measured stator currents, stator voltages and estimated rotor fl uxes. The proposed sensorless drive has for purpose to compensate at the same time both stator resistance and rotor time constant inverse variation, which change during operation. Indeed, in the proposed adaptive Luenberger observer, a Fuzzy Logic Controller will be adopted as an adaptation mechanism. The proposed observer stability is proved by the Lyapunov’s theorem and its feasibility is verifi ed by series of experimental tests. The relevant results and the eff ectiveness of the improved system are clearly shown through obtained experimental results with an induction motor of 1 kW driven by dSPACE system.
Zakaria Loloie,Mehrdad Mozaffarian,Mansooreh Soleimani,Neda Asassian 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.2
This research demonstrates the production of activated carbon from scrap tires via physical activation with carbon dioxide. A newly constructed apparatus was utilized for uninterrupted carbonization and activation processes. Taguchi experimental design (L16) was applied to conduct the experiments at different levels by altering six operating parameters. Carbonization temperature (550-700 oC), activation temperature (800-950 oC), process duration (30-120 min), CO2 flow rate (400 and 600 cc/min) and heating rate (5 and 10 oC/min) were the variables examined in this study. The effect of parameters on the specific surface area (SSA) of activated carbon was studied, and the influential parameters were identified employing analysis of variance (ANOVA). The optimum conditions for maximum SSA were: carbonization temperature=650 oC, carbonization time=60min, heating rate=5 oC/min, activation temperature= 900 oC, activation time=60min and CO2 flow rate=400 cc/min. The most effective parameter was activation temperature with an estimated impact of 49%. The activated carbon produced under optimum conditions was characterized by pore and surface structure analysis, iodine adsorption test, ash content, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The process yield for optimized activated carbon was 13.2% with the following properties: specific surface area=437m2/g, total pore volume=0.353 cc/g, iodine number=404.7mg/g and ash content=13.9% along with an amorphous structure and a lot of oxygen functional groups. These properties are comparable to those of commercial activated carbons.
( Zakaria Boumezbeur ),( Hacène Boutabia ) 호남수학회 2023 호남수학학술지 Vol.45 No.3
This paper deals with differentiability of solutions of neutral stochastic differential equations with respect to the initial data in the G-framework. Since the initial data belongs to the space BC ([-r, 0] ;R<sup>n</sup>) of bounded continuous R<sup>n</sup>-valued functions defined on [-r, 0] (r > 0), the derivative belongs to the Banach space L<sub>BC</sub> (R<sup>n</sup>) of linear bounded operators from BC ([-r, 0] ;R<sup>n</sup>) to R<sup>n</sup>. We give the neutral stochastic differential equation of the derivative. In addition, we exhibit two examples confirming the accuracy of the obtained results.
A review on Object Detection in Optical Remote Sensing Images
Zakaria Louadi,Kil To Chong,Munkhtamir Oyumaa 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
The automatic object detection in high-resolution remote sensing images has become the fundamental point in the application of remote sensing technology and satellite image analysis. Due to the advances of powerful feature representations, machine-learning-based object detection is receiving increasing attention. While enormous methods exist, a deep review of the literature is still lacking. This paper aims to provide a review of the recent progress in this field. It is our hope that this survey will be beneficial for the researchers to have better understanding of this research field.
HYDROMAGNETIC FLUCTUATING FLOW OF A COUPLE STRESS FLUID THROUGH A POROUS MEDIUM
Zakaria, M. 한국전산응용수학회 2002 Journal of applied mathematics & informatics Vol.10 No.1
The equations of a polar fluid of hydromagnetic fluctuating through a porous medium axe cast into matrix form using the state space and Laplace transform techniques the resulting formulation is applied to a variety of problems. The solution to a problem of an electrically conducting polar fluid in the presence of a transverse magnetic field and to a problem for the flow between two parallel fixed plates is obtained. The inversion of the Laplace transforms is carried out using a numerical approach. Numerical results for the velocity, angular velocity distribution and the induced magnetic field are given and illustrated graphically for each problems.