The Impact of Capital Adequacy and Operating Efficiency on Saudi Banks Performance

Khaled Subhi RAJHA(Khaled Subhi RAJHA ) 한국유통과학회 2023 The Journal of Asian Finance, Economics and Busine Vol.10 No.2

This study investigates the impact of capital adequacy and operating efficiency on the performance of Saudi banks. In the first part, the study includes a brief introduction focused on the impact of capital adequacy and operating efficiency on the performance of banks. In the second part, a literature review examined various studies on the impact of capital adequacy and operating efficiency on banks’ performance. The study methodology was presented in the third part, based on a sample that included all local Saudi banks from 2010 to 2021, using a study model to answer the study hypotheses. The results of the panel data regression indicated that CAR had a negative and significant effect on ROA and ROE but a negative and non-significant effect on NIM. CIR has a negative and significant effect on ROA, ROE, and NIM, while SIZE, LTD, and MS have a positive and significant effect on ROA, ROE, and NIM. Elimination of defects has no significant effect on return on assets, return on equity, and the NIF. But CR has no significant effect on ROA and ROE but has a positive and significant effect on NIM.

Effect of Eight Week's Dryland Strength Training on Adolescent Backstroke and Freestyle Performance: A Randomized Controlled Trial

Khaled Abdullah Alshdokhi(Khaled Abdullah Alshdokhi ),Carl James Petersen(Carl James Petersen ),Jenny Claire Clarke(Jenny Claire Clarke ) 사피엔시아 2020 Exercise Medicine Vol.4 No.-

Objectives: Swimmers undertake dryland training to improve power and maximise propulsion. Our purpose was to improve strength and quantify transfer to adolescent sprint backstroke and freestyle performances. Methods: Twenty-eight male competitive swimmers participated (age: 12.6±2.6 years; height 156.4±13.4 cm; mass 49.8±15.0 Kg; 50 m freestyle best time 45.0±8.5 s) and were randomized to either dryland strength plus swimming (DS) or a swimming only control group (CONT). The 8 week dryland programme (3 days/week) consisted of 8–10 exercises per session (22 exercises in total) with predominantly 1–2 sets of ~10–20 repetitions. Pre, mid and post 8 weeks training, a strength test battery (countermovement jump, pronated chin ups, isometric forearm and back extension) and 25 m pool testing of backstroke and freestyle was undertaken. Results: DS had greater strength improvements across the test battery (13–167%; ES, 0.51–1.84) than CONT (8-120%; ES, 0.35–2.0) with p<0.05 for 6 of 8 measures. For 50 and 100 m freestyle, DS had greater percentage improvement (DS, 4.8±1.6 and 3.7±1.6%, ES, 0.20 and 0.16; CONT, 2.7±0.9 and 1.6±0.8%, ES, 0.16 and 0.13, p<0.01). There was no between group statistically significant change in backstroke percentage improvement, however both groups displayed small magnitudes of improvements in 50 m and trivial improvements over the 100 m distance (DS, 4.4±2.3 and 1.6±0.5%, ES, 0.29 and 0.08; CONT, 3.6±2.5 and 1.3±0.5%, ES, 0.26, 0.08). Conclusions: Over 8 weeks, adding 90 min dryland training / week to ~7 hour/week swim schedule further improved freestyle ~2.1% and backstroke ~0.5% more than swim training alone.

Effect of 8 Weeks of Grip Strength Training on Adolescent Sprint Swimming: A Randomized Controlled Trial

Khaled Abdullah Alshdokhi(Khaled Abdullah Alshdokhi ),Carl James Petersen(Carl James Petersen ),Jenny Claire Clarke(Jenny Claire Clarke ) 사피엔시아 2020 Exercise Medicine Vol.4 No.-

Objectives: Grip strength positively correlates with faster sprint swimming performance in both master and elite level swimmers. But it remains unknown whether improving grip strength improves swim performance. Our objective was firstly to increase grip strength and secondly to determine if improved grip strength results in faster backstroke and freestyle sprint swimming performance. Methods: Using a randomised, control trial design 26 adolescent swimmers were randomly divided into either a swimming only Control group (n=9, age 11.5 ± 1.6 y; 6 male, 3 female) or one of two grip strength training groups: Powerball (n=9, age 11.5 ± 1.6 y, 6 male, 3 female) or Stressball (n= 8, age 11.6 ± 1.6 y, 5 male, 3 female). The Powerball (Powerball and Power Gripper devices) and Stressball (Stressball and Skrunch ball) groups completed a grip strength training program (4x/week for 8 weeks) in addition to their normal swimming training (4 hours per week). Pre and post the training intervention, isometric grip strength was measured using a mechanical hand dynamometer (Lafayette Instrument, Lafayette, IN) while 50 m freestyle and 100 m backstroke short-course swimming time trials were also undertaken. Results: Over 8 weeks, all groups improved their maximal grip strength with moderate to large changes (Powerball 30 ± 12%, ES=1.70; Stressball 36 ± 22%, ES=1.07; Control 35 ± 12%, ES=0.79). There were no statistically significant changes for any group in the 100 m backstroke (P>0.05), but significant (P<0.05) small improvement in the Powerball (4.1 ± 5.6%, ES=0.26) and Stressball groups (3.4 ± 3.4%, ES=0.24) during 50 m freestyle. There were no significant between group changes for any variable. Conclusions: Grip strength improved but failed to improve 100 m backstroke performance. Improving grip strength may contribute towards faster 50 m freestyle swim performance in this adolescent age group.

Safe bioremediation of chromium by Pseudomonas isolated from industrial waste water and detection of genes responsible for its degradation

Sara Khaled Ahmed(Sara Khaled Ahmed ),Gamal Mohamedin Hassan(Gamal Mohamedin Hassan ),Tharwat El dosoky Radwan(Tharwat El dosoky Radwan ) 한국축산식품학회 2022 Food and Life Vol.2022 No.2

Isolation of microorganisms capable of reducing toxic chromium (VI) into less toxic chromium (III) has been given attention due to their significance in bioremediation of the contaminated sites. Five isolates out of the twelve isolates were selected according to their abilities to grow in the presence of high concentration of chromium. From the five bacterial isolates, isolates FAYP2 and FAYP3 were selected according to their higher reduction percent of toxic chromium (VI) into chromium (III) and their reduction percent was 60% and 70% respectively. The isolates FAYP2 and FAYP3 were identified as Pseudomonas aeruginosa and Pseudomonas zhadogens, respectively, based on morphological and biochemical characterization and confirmed by molecular sequence analyses of amplified 16S rRNA genes with accession numbers OMO10239 and OMO019074. The results reveal that P. aeruginosa FAYP2 and P. zhadogens FAYP3 can be used for the bioremediation of wastewater effluent containing hexavalent chromium.

NEW TYPE INTEGRAL INEQUALITIES FOR CONVEX FUNCTIONS WITH APPLICATIONS

KHALED MEHREZ,agarwal 장전수학회 2018 Proceedings of the Jangjeon mathematical society Vol.21 No.3

We have recently established some integral inequalities for convex functions via the Hermite-Hadamard's inequalities. In continuation here, we also establish some interesting new integral inequalities for convex functions via the Hermite-Hadamard's inequalities and Jensen's integral inequality. Useful applications involving special means are also included.

Evaluating the effect of seasonal variations on walking behaviour in a hot weather country using logistic regression

Khaled Shaaban,Deepti Muley,Dina Elnashar 서울시립대학교 도시과학연구원 2018 도시과학국제저널 Vol.22 No.3

The city of Doha, Qatar experiences a hot and arid weather throughout the year. This study investigates the effect of season, type of day, and time of day on the walking behaviour of pedestrians in these conditions using logistic regression. The study uses data obtained from observational surveys conducted at a densely populated mixed-use neighbourhood located in the heart of the city. The results showed the walking activity is much less during hot weather. The results of the logistic regression analysis suggested that the pedestrians from other nationalities living in Qatar had much higher odds of walking compared to the Qatari nationals. Furthermore, men had almost double the odds of walking compared to females. The choice of the time of day model indicated that a pedestrian has more than twice the odds of walking in the evening time compared to the morning and afternoon times. The results can help policy makers and public agencies to develop programmes to promote the walking culture in this region.

Chromium(III) Complex Obtained from Dipicolinic Acid: Synthesis, Characterization, X-Ray Crystal Structure and Electrochemical Studies

Khaled Ghasemi,Ali Reza Rezvani,Ibrahim Abdul Razak,Abolghasem Moghimi,Fatemeh Ghasemi,Mohd Mustaqim Rosli 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.10

The synthesis, X-ray crystallography, spectroscopic (IR, UV-vis), and electrochemical properties of the title compound, [H3O][Cr(dipic)2] [H3O+.Cl−] (1), (H2dipic = 2,6-pyridinedicarboxylic acid), are reported. This complex crystallizes in the monoclinic space group Cc with a = 14.9006(10) Å, b = 12.2114(8) Å, c = 8.6337(6) Å, α = 90.00°, β = 92.7460(10)°, γ = 90.00°, and V = 1569.16(18) Å3 with Z = 4. The hydrogen bonding and noncovalent interactions play roles in the stabilization of the structure. In order to gain a better understanding of the most important geometrical parameters in the structure of the complex, atoms in molecules (AIM) method at B3LYP/6-31G level of theory has been employed.

Monotonicity criterion and functional inequalities for some $q$-special functions

Khaled Mehrez 대한수학회 2021 대한수학회지 Vol.58 No.1

Our aim in this paper is to derive several new monotonicity properties and functional inequalities of some functions involving the $q$-gamma, $q$-digamma and $q$-polygamma functions. More precisely, some classes of functions involving the $q$-gamma function are proved to be logarithmically completely monotonic and a class of functions involving the $q$-digamma function is showed to be completely monotonic. As applications of these, we offer upper and lower bounds for this special functions and new sharp upper and lower bounds for the $q$-analogue harmonic number harmonic are derived. Moreover, a number of two-sided exponential bounding inequalities are given for the $q$-digamma function and two-sided exponential bounding inequalities are then obtained for the $q$-tetragamma function.

Comparative evaluation among various robust estimation methods in deformation analysis

Khaled Mohamed Zaky Hassan 대한공간정보학회 2016 Spatial Information Research Vol.24 No.4

There is different robust estimation methods used for detecting small gross errors which may be presence in geodetic observations. Some of these methods are robust M-estimators, Least Absolute Sum and Danish method. The conventional Least Squares Estimation method and these robust estimation methods have been tested and applied on a precise geodetic network designed for detecting earth’s crustal deformations using singlepoint and rigid body displacement models. The results show that, the method of least squares leads to biased, unfavorable solution and useless estimates if the singlepoint displacement does not taken into considerations in the solution’s mathematical model. In contrast, the results of robust estimation methods are attained unbiased in a single estimation step. A reliable separation of single-point displacement and the general deformation model is achieved without difficulties. The comparison of results proved that, the Danish method gave the most accurate results. It also was more sensitive to outliers which may be presence in surveying observations in case of applying single-point displacement model. The Least Absolute Sum method was very nicely reproduces the simulated deformations and does not show a contamination of the estimated positions of stable points in the case of rigid body displacement model. The results of adjustment using rigid body displacement model were not identical with the nearly correct results of single-point displacement model. So, the rigid body displacement model may be not suitable for geodetic networks.

Dynamic Stability Enhancement Using Fuzzy PID Control Technology for Power System

Khaled Eltag,Muhammad Shamrooz Aslam,Rizwan Ullah 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.1

This article presents Fuzzy Particle Swarm Optimization of PID controller PSO-FPIDC used as a ConventionalPower System Stabilizer CPSS to improve the dynamic stability performance of generating unit duringlow frequency oscillations. Speed deviation Δw and acceleration Δw˙ of synchronous generator are taken as inputto the PSO-FPIDC controller connected to Single Machine Infinite Busbar SMIB system. This controller examinedunder different perturbation scenarios. The dynamic performance of the PSO-FPIDC is compared with theFuzzy Teacher Learner Based Optimization PID TLBO-FPIDC, PSO-PID, TLBO-PID and optimal parameters ofconvectional Power System Stabilizer CPSS. The results show that the performance of PSO-FPIDC has small overshoot/undershoot and damp out lower frequency oscillations very quickly as compared to other controllers.