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Articles 70831 - 70860 of 1519340

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Initial And Boundary Value Problems For Fractional Differential Equations Involving Atangana-Baleanu Derivative, Al-Musalhi Fatma S., Al-Salti Nasser S., 2fracdiff Research Group, Sultan Qaboos University, Muscat, Sultanate Of Oman, Karimov Erkinjon, Institute Of Mathematics, Uzbekistan Academy Of Sciences, Tashkent 170, Uzbekistan Apr 2025

Initial And Boundary Value Problems For Fractional Differential Equations Involving Atangana-Baleanu Derivative, Al-Musalhi Fatma S., Al-Salti Nasser S., 2fracdiff Research Group, Sultan Qaboos University, Muscat, Sultanate Of Oman, Karimov Erkinjon, Institute Of Mathematics, Uzbekistan Academy Of Sciences, Tashkent 170, Uzbekistan

Sultan Qaboos University Journal For Science

In the present work, an initial value problem involving the Atangana-Baleanu derivative is considered. An explicit solution of the given problem in integral form is obtained by using the Laplace transform. The use of the given initial value problem is illustrated by considering a boundary value problem in which the solution is expressed in the form of a series expansion using an orthogonal basis obtained by separation of variables. Some examples are also given to illustrate the obtained results.

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Numerical Simulations Of A Delay Model For Immune System-Tumor Interaction, Mohamed A. Hajji, Qasem Al-Mdallal Apr 2025

Numerical Simulations Of A Delay Model For Immune System-Tumor Interaction, Mohamed A. Hajji, Qasem Al-Mdallal

Sultan Qaboos University Journal For Science

In this paper we consider a system of delay differential equations as a model for the dynamics of tumor-immune system interaction. We carry out a stability analysis of the proposed model. In particular, we show that the system can have up to two steady states: the tumor free steady state, which always exist, and the tumor persistent steady state, which exists only when the relative rate of increase of the tumor cells exceeds the ratio between the natural proliferation rate and the relative death rate of the effector cells. We also determine an upper bound for the delay, such that …

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A New Second Order Approximation For Fractional Derivatives With Applications, Haniffa M.Nasir, Kamel Nafa Apr 2025

A New Second Order Approximation For Fractional Derivatives With Applications, Haniffa M.Nasir, Kamel Nafa

Sultan Qaboos University Journal For Science

We propose a generalized theory to construct higher order Grünwald type approximations for fractional derivatives. We use this generalization to simplify the proofs of orders for existing approximation forms for the fractional derivative. We also construct a set of higher order Grünwald type approximations for fractional derivatives in terms of a general real sequence and its generating function. From this, a second order approximation with shift is shown to be useful in approximating steady state problems and time dependent fractional diffusion problems. Stability and convergence for a Crank-Nicolson type scheme for this second order approximation are analyzed and are supported …

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Heat Transfer In Fe3o4-H2o Nanofluid Contained In A Triangular Cavity Under A Sloping Magnetic Field, Mohammad M.Rahman Apr 2025

Heat Transfer In Fe3o4-H2o Nanofluid Contained In A Triangular Cavity Under A Sloping Magnetic Field, Mohammad M.Rahman

Sultan Qaboos University Journal For Science

Numerical simulation is performed to explore the convective heat transfer characteristics of Fe3O4-H2O nanofluid contained in a right-angle triangular cavity considering three types of thermal boundary conditions at the bottom wall. No heat is allowed to escape through the insulated vertical wall, whereas the inclined wall is kept colder than the bottom one. A sloping magnetic field whose strength is unvarying acts upon the cavity. The physical model is converted to the mathematical form through coupled highly nonlinear partial differential equations. These equations are then transformed into the non-dimensional form with the help of a group of transformations of variables. …

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Luminol Chemiluminescence Catalyzed By Silver Nanoparticles For The Sensitive Determination Of Penicillamine, Fakhr Eldin O. Suliman, Kauther Al-Hadhrami Apr 2025

Luminol Chemiluminescence Catalyzed By Silver Nanoparticles For The Sensitive Determination Of Penicillamine, Fakhr Eldin O. Suliman, Kauther Al-Hadhrami

Sultan Qaboos University Journal For Science

A sequential injection method for the determination of penicillamine (PA) was developed based on quenching the chemiluminescence generated by oxidation of luminol by hydrogen peroxide in presence of silver nanoparticles (AgNPs). The chemiluminescence (CL) of the reaction was found to greatly enhance in presence of AgNPs due to the increased catalyst surface area. The method was sensitive and found suitable for analysis of penicillamine in pharmaceutical preparations. Linear calibration curve is obtained in the range 0.2-1.0 mg mL-1 with a relative standard deviation less than 2%. A recovery percent of 102.3 ±0.2 was obtained with the tablets matrix indicating reasonable …

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Synthesis And Coordination Chemistry Of Boron-Functionalized Poly(Pyrazolylpyridyl)Borate With Ln(Iii) Metals, Nawal Al-Rasbi, Michael David D.Ward Apr 2025

Synthesis And Coordination Chemistry Of Boron-Functionalized Poly(Pyrazolylpyridyl)Borate With Ln(Iii) Metals, Nawal Al-Rasbi, Michael David D.Ward

Sultan Qaboos University Journal For Science

A new family of lanthanide/boron-based complexes have been synthesized from the novel substituted poly(pyrazolylpyridyl)borate ligand containing phenyl substituents on the boron atom Ph2Bppy (L). The complexes have been fully characterized by analytical and spectroscopic methods. The single crystal X-ray structure and mass spectroscopy reveal the isostructural dinuclear complexes: [Ln2(L)2(NO3)2(OH)2] where Ln = Eu, Gd or Tb. Upon excitation of the Ln(III) complexes in DCM, their luminescence spectra display narrow f–f transitions. It is found that the ligand can efficiently sensitize the Tb(III) complex because of the better triplet state energy match to the Tb(III)–5D0 excited states.

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Finite Element Approximation Of Variational Inequalities: An Algorithmic Approach, Messaoud Boulbrachene Apr 2025

Finite Element Approximation Of Variational Inequalities: An Algorithmic Approach, Messaoud Boulbrachene

Sultan Qaboos University Journal For Science

In this paper, we introduce a new method to analyze the convergence of the standard finite element method for elliptic variational inequalities with noncoercive operators (VI). The method consists of combining the so-called Bensoussan-Lions algorithm with the characterization of the solution, in both the continuous and discrete contexts, as fixed point of contraction. Optimal error estimates are then derived, first between the continuous algorithm and its finite element counterpart, and then between the true solution and the approximate solution.

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Teaching Statistics To Engineering Students – An Australian Experience Of Using Educational Technologies, Shahjahan Khan, Department Of Mathematics And Statistics, College Of Science, Sultan Qaboos University, Oman, Mohammad Mrk Khadem, Sujan Piya Apr 2025

Teaching Statistics To Engineering Students – An Australian Experience Of Using Educational Technologies, Shahjahan Khan, Department Of Mathematics And Statistics, College Of Science, Sultan Qaboos University, Oman, Mohammad Mrk Khadem, Sujan Piya

Sultan Qaboos University Journal For Science

Engineers require scientific methods whereby models are developed to explain real phenomena. Model building, data collection, data analysis, and data interpretation form the very core of any sound engineering practice. Therefore statistical methodologies are vital components in engineering curricula and engineers should have the ability to think statistically when dealing with data. They should learn how to design and conduct well-planned experiments to improve the efficiency of the process and the quality of products, and must learn to deal with data, and interpret results produced as a part of their data analysis skills. Statistical methods are vital in engineering practices …

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Composition Of Solid Waste In Al Jabal Al Akhdar, A Mountain Region Undergoing Rapid Urbanization In Northern Oman, Abdullah I. Al-Mahrouqi, Reginald Victor Apr 2025

Composition Of Solid Waste In Al Jabal Al Akhdar, A Mountain Region Undergoing Rapid Urbanization In Northern Oman, Abdullah I. Al-Mahrouqi, Reginald Victor

Sultan Qaboos University Journal For Science

There is a lack of data on the generation and composition of waste in rural areas worldwide. The present study analyzed the composition of solid waste in Al Jabal Al Akhdar, a rural mountain region in the Sultanate of Oman, which is presently experiencing a rapid rate of urbanization due to tourism development. The solid wastes here are generated by the municipality collecting waste from residential, commercial, institutional and recreational areas, the military from a training camp and a few non-governmental private companies from their camps and hotels. The whole load from each of the three sources was manually segregated …

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Study On The Reactivity Of Amino Acid Chemosensor, Npfnp, With Ethanol: Structural Elucidation Through Single Crystal Xrd And Dft Calculations, Beena Varghese, Saleh N. Al-Busafi, Fakhr Eldin O. Suliman, Salma Al-Kindy Apr 2025

Study On The Reactivity Of Amino Acid Chemosensor, Npfnp, With Ethanol: Structural Elucidation Through Single Crystal Xrd And Dft Calculations, Beena Varghese, Saleh N. Al-Busafi, Fakhr Eldin O. Suliman, Salma Al-Kindy

Sultan Qaboos University Journal For Science

A novel ethoxy derivative of an amino acid chemosensor, 3-naphthyl-1-phenyl-5-(2ʹ-fluoro-5ʹ-nitrophenyl)-2-pyrazoline (NPFNP), has been synthesized and characterized by different spectroscopic methods. A single crystal of the ethoxy derivative, 3-naphthyl-1-phenyl-5-(2ʹ-ethoxy-5ʹ-nitrophenyl)-2-pyrazoline NPENP, has been obtained and characterized. The structure holds interest as it carries biologically active pyrazoline as a central ring attaching to electron donating and withdrawing substituents. The major motivation for this work was to gain detailed insight into the structural parameters of this compound for investigating the influence of crystal packing and geometrical dimensions on optical properties. Time-dependent DFT calculations have been employed for comparing the XRD data with theoretical parameters. …

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Review Of The Sayh Al Uhaymir (Sau) 005, Plus Pairings, Martian Meteorite From Al Wusta, Oman, Arshad Ali, Sobhi Nasir, Iffat Jabeen, Ahmed Al-Rawas Apr 2025

Review Of The Sayh Al Uhaymir (Sau) 005, Plus Pairings, Martian Meteorite From Al Wusta, Oman, Arshad Ali, Sobhi Nasir, Iffat Jabeen, Ahmed Al-Rawas

Sultan Qaboos University Journal For Science

Al Wusta is a desert area in the Sultanate of Oman which is famous due to the discovery of a number of Martian and Lunar meteorites since the start of the present millennium. According to the Meteoritical Bulletin database, 137 approved Martian meteorites have been found worldwide, including 17 from Oman (4 from Zufar, 13 from Al Wusta region). Interestingly 11 finds in the last 15 years have been of Sayh al Uhaymir (SaU) 005 and its pairings. These finds (estimated mass = 11.2 kg) are linked to 10 search expeditions carried out between November 26, 1999 and March 2, …

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Effect Of Nano Sb2o3 On The Dispersive Optical Constants Of Pmma Films, Wasan A. Al-Taa'y, Mohammed T. Abdul Nabi, Saad F. Oboudi, Emad Yousif Apr 2025

Effect Of Nano Sb2o3 On The Dispersive Optical Constants Of Pmma Films, Wasan A. Al-Taa'y, Mohammed T. Abdul Nabi, Saad F. Oboudi, Emad Yousif

Sultan Qaboos University Journal For Science

Pure and Antimony Trioxide Sb2O3 doped PMMA films were prepared by the casting method. Optical absorption measurements in the wavelength range 200-800 nm were studied by using a computerized UV-Vis spectrophotometer (Shimadzu UV-1601 PC) and these confirmed that PMMA films have a direct band gap that decreases from 5.15 to 4.66 eV as the doping concentration increases to 5wt%. The increase in the density of localized states from 8.9 to 74.5 meV causes an expansion in the Urbach tail and consequently decreases the energy gap. The dispersion of the refractive index was analyzed using the concept of a single oscillator. …

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Two Dimensional Short Time Hartley Transforms, Narasimman Sundararajan, A. Ebrahimi, Nannappa Vasudha Apr 2025

Two Dimensional Short Time Hartley Transforms, Narasimman Sundararajan, A. Ebrahimi, Nannappa Vasudha

Sultan Qaboos University Journal For Science

The Hartley transform, as in the case of the Fourier transform, is not suitably applicable to non-stationary representations of signals whose statistical properties change as a function of time. Hence, different versions of 2-D short time Hartley transforms (STHT) are given in comparison with the short time Fourier transform (STFT). Although the two different versions of STHT defined here with their inverses are equally applicable, one of them is mathematically incorrect/incompatible due to the incorrect definition of the 2-D Hartley transform in literature. These definitions of STHTs can easily be extended to multi-dimensions. Computations of the STFT and the two …

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A Note On Using Partitioning Techniques For Solving Unconstrained Optimization Problems On Parallel Systems, Mehiddin Al-Baali, Chefi Triki Apr 2025

A Note On Using Partitioning Techniques For Solving Unconstrained Optimization Problems On Parallel Systems, Mehiddin Al-Baali, Chefi Triki

Sultan Qaboos University Journal For Science

We deal with the design of parallel algorithms by using variable partitioning techniques to solve nonlinear optimization problems. We propose an iterative solution method that is very efficient for separable functions, our scope being to discuss its performance for general functions. Experimental results on an illustrative example have suggested some useful modifications that, even though they improve the efficiency of our parallel method, leave some questions open for further investigation.

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Rolling Optimization Method For Humanoid Robots, Riadh Zaier Apr 2025

Rolling Optimization Method For Humanoid Robots, Riadh Zaier

Sultan Qaboos University Journal For Science

In this paper, a method of optimizing the rolling amplitude needed for a stable and smooth walking movement of a humanoid robot is considered. The optimization algorithm was based on minimizing a cost function defined by the rolling overshoot. The amplitude of the rolling during locomotion was calculated using the lateral zero moment point (ZMP) position. The initial value of the rolling was the static rolling that corresponds to the position of the ZMP at the center of the support polygon. The algorithm consisted of performing a ZMP calculation at two points that correspond to single support phases. Simplifying the …

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An Efficient Parallel Gauss-Seidel Algorithm On A 3d Torus Network-On-Chip, Khaled Day, Mohammad H. Al-Towaiq Apr 2025

An Efficient Parallel Gauss-Seidel Algorithm On A 3d Torus Network-On-Chip, Khaled Day, Mohammad H. Al-Towaiq

Sultan Qaboos University Journal For Science

Network-on-chip (NoC) multi-core architectures with a large number of processing elements are becoming a reality with the recent developments in technology. In these modern systems the processing elements are interconnected with regular NoC topologies such as meshes and tori. In this paper we propose a parallel Gauss-Seidel (GS) iterative algorithm for solving large systems of linear equations on a 3-dimensional torus NoC architecture. The proposed parallel algorithm is O(Nn2/k3) time complexity for solving a system with a matrix of order n on a k×k×k 3D torus NoC architecture with N iterations assuming n and N are large compared to k. …

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The Influence Of Diets Containing Phenols And Condensed Tannins On Protein Picture, Clinical Profile And Rumen Characteristics In Omani Sheep, Osman Mahgoub, Isam T.Kadim, Hamza A. Babiker, Mohammed N. Al-Kindi Apr 2025

The Influence Of Diets Containing Phenols And Condensed Tannins On Protein Picture, Clinical Profile And Rumen Characteristics In Omani Sheep, Osman Mahgoub, Isam T.Kadim, Hamza A. Babiker, Mohammed N. Al-Kindi

Sultan Qaboos University Journal For Science

A study was carried out to investigate the effects of feeding low quality non-conventional feeds (NCF) containing phenols and condensed tannins on health and performance characteristics in Omani sheep. Twelve Omani sheep were fed one of two base roughages, urea-treated palm frond (UTPF) or Rhodesgrass hay, (RGH) plus a commercial concentrate for 63 days. Haematological, serum biochemical and urine analyses were used to assess sheep health. Serum protein fractions were measured using electrophoresis. Urea-treated palm frond contained higher levels of polyphenols and condensed tannins and fiber than Rhodesgrass hay or concentrate feed. Animals fed UTPF had lower feed intake (P<0.05) and lower body gain (P<0.001) than those fed RGH. Rumen liquor of UTPF-fed animals had higher pH, ammonia-nitrogen and butyric fatty acid but lower acetic fatty acid (P<0.05). Animals fed UTPF had higher neutrophil (P<0.05) but lower lymphocyte (P<0.05) and monocyte (P<0.001) counts by the end of the trial than those fed RGH. There were no effects of diet on serum albumin or globulin fraction levels or albumin:globulin ratio. There were no major effects on urine analysis but there was a trend by control animals to have higher protein and specific gravity than treated ones. This study indicated that feeding low quality non-conventional feeds containing polyphenols or tannins would reduce body gain and may produce some effects on clinical parameters. Although tannins are known to influence protein digestion and absorption in ruminants, it did not significantly affect the serum protein picture in sheep.

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The Effect Of Starvation On The Liver Of Aphanius Dispar (Pisces; Cyprinodontidae): A Microscopic Study, Taher A. Ba-Omar, Mariam Al-Amri, Jameela Al-Belushi, Reginald Victor Apr 2025

The Effect Of Starvation On The Liver Of Aphanius Dispar (Pisces; Cyprinodontidae): A Microscopic Study, Taher A. Ba-Omar, Mariam Al-Amri, Jameela Al-Belushi, Reginald Victor

Sultan Qaboos University Journal For Science

Stress due to starvation is not an uncommon phenomenon in fresh-and brackish water fish living in arid environments. This study, a part of a larger investigation on the effects of stress due to starvation on the organ systems of Aphanius dispar, a cyprinodont fish in Oman, reports on the histopathological changes in the liver, using light and transmission electron microscopy. The hepatocytes showed structural and ultrastructural changes in response to 24, 48, 72 and 96 hours of starvation. The hepatocytes of the starved fish groups were characterized by a reduction in the size of their cells and their nuclei, chromatin …

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Ferrocenylethynyl - A Versatile Platform For New Molecules To Novel Materials, Hakikulla H. Shah, Rayya A. Al-Belushi, Muhammad S. Khan Apr 2025

Ferrocenylethynyl - A Versatile Platform For New Molecules To Novel Materials, Hakikulla H. Shah, Rayya A. Al-Belushi, Muhammad S. Khan

Sultan Qaboos University Journal For Science

Ferrocenylethynyl is a key starting material for the synthesis of fascinating new molecules and novel functional materials. It combines the robust and redox-active ferrocene moiety with the rigid-rod ethynyl unit. The ferrocene center provides chemically and electrochemically switchable material properties whereas the ethynyl backbone facilitates electron delocalization along the molecule, yielding materials with the potential for a wide range of applications from sensors to bio-organometallics and pharmaceuticals, from catalysts to nonlinear optical materials, and from fuel additives to chelating agents. However, lifetime performances and costs still need to be optimized to make ferrocenylethynyl-based materials commercially competitive. Efficient synthetic methods are …

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An Annotated Checklist Of The Mammals Of Kuwait, Peter J. Cowan Apr 2025

An Annotated Checklist Of The Mammals Of Kuwait, Peter J. Cowan

Sultan Qaboos University Journal For Science

An annotated checklist of the mammals of Kuwait is presented, based on the literature, personal communications, a Kuwait website and a blog and the author’s observations. Twenty five species occur, a further four are uncommon or rare visitors, six used to occur whilst another two are of doubtful provenance. This list should assist those planning desert rehabilitation, animal reintroduction and protected area projects in Kuwait.

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Neorotalia Omanensis And Operculina Musawaensis From The Sultanate Of Oman, Abdul Razak Siddiq Al-Sayigh Apr 2025

Neorotalia Omanensis And Operculina Musawaensis From The Sultanate Of Oman, Abdul Razak Siddiq Al-Sayigh

Sultan Qaboos University Journal For Science

Two new species of larger benthic foraminifera, Neorotalia omanensis n. sp. and Operculina musawaensis n. sp. are described and illustrated from the eastern Oman Mountains. N. omanensis n. sp. occurs in the Musawa Formation in association with the planktonic foraminifera Morozovella edgari and Truncarotaloides topilensis indicating an early to middle Eocene age (P10-P13). Operculina musawaensis n. sp. occurs in the Abat Formation in association with the planktonic foraminifera Acarinina esnaensis and A. soldadensis indicating an early Eocene age (P6). This is the first known record showing the presence of genus Neorotalia in the Middle East. Representatives of the larger foraminiferal …

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Volatile Compounds Of The Leaves And Flowers Of Lavandula Dhofarensis A.G. Miller, John R. Williams, Majekodunmi O. Fatope, Salma M.Z. Al-Kindy, Fakhr Eldin O. Suliman, Salim H. Al-Saidi Apr 2025

Volatile Compounds Of The Leaves And Flowers Of Lavandula Dhofarensis A.G. Miller, John R. Williams, Majekodunmi O. Fatope, Salma M.Z. Al-Kindy, Fakhr Eldin O. Suliman, Salim H. Al-Saidi

Sultan Qaboos University Journal For Science

The leaves and flowers of Lavandula dhofarensis were collected from the Dhofar region of Oman and hydro-distilled to give low boiling volatiles, which did not condense at 10 oC. The dichloromethane extract of the hydrosol was analyzed by GC/FID and GC/MS. Sixty four compounds were identified in the volatiles of the leaves, accounting for 78.7% of the total. The major components were caryophyllene oxide (8.0%), germacrene (7.9%), spathulenol (7.8%), and b-caryophyllene (6.6%). Eighty six compounds were also identified in the volatiles of the leaves plus flowers, comprising 94.5% of the total. The major compounds were camphor (12.9%), viridiflorol (10.5%), a-terpinyl …

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Preface, - Squjs Apr 2025

Preface, - Squjs

Sultan Qaboos University Journal For Science

This special issue contains selected papers presented at the Second International Conference on Numerical Analysis and Optimization: Theory, Methods, Applications and Technology Transfer (NAOII2011) held during the period January 3-6, 2011 at Sultan Qaboos University (SQU), Muscat, Oman. The conference was sponsored by SQU, The Research Council (TRC) of Oman, The International Center for Theoretical Physics (ICTP) of Italy, Microsoft (Middle East and Africa Division); and the local sponsors the British Council (Oman), Bank Muscat, the Al-Anan Press, and Al-Roya Newspaper.Following on from the success of the previous conference on Numerical Analysis and Optimization (NAO2008) also held at SQU during …

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First Steps In Mesh Wifi Network Design By Genetic Algorithm, Martin B. Reed, Stuart Nash Apr 2025

First Steps In Mesh Wifi Network Design By Genetic Algorithm, Martin B. Reed, Stuart Nash

Sultan Qaboos University Journal For Science

Given a mesh of wireless nodes for WiFi customers covering a city district, we describe a genetic algorithm-based approach to the problem of selecting a small fixed number of nodes as gateways to the internet, and linking the remaining nodes to the gateways either directly or by 'hopping', to create an efficient mesh network structure. The algorithm uses a modification of k-means clustering to allocate nodes to gateways.

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Global Search Strategies For Solving Multilinear Least-Squares Problems, Mats Andersson, Oleg Burdakov, Hans Knutsson, Spartak Zikrin Apr 2025

Global Search Strategies For Solving Multilinear Least-Squares Problems, Mats Andersson, Oleg Burdakov, Hans Knutsson, Spartak Zikrin

Sultan Qaboos University Journal For Science

The multilinear least-squares (MLLS) problem is an extension of the linear least-squares problem. The difference is that a multilinear operator is used in place of a matrix-vector product. The MLLS is typically a large-scale problem characterized by a large number of local minimizers. It originates, for instance, from the design of filter networks. We present a global search strategy that allows for moving from one local minimizer to a better one. The efficiency of this strategy is illustrated by the results of numerical experiments performed for some problems related to the design of filter networks.

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The Squared Slacks Transformation In Nonlinear Programming, Paul Armand, Dominique Orban Apr 2025

The Squared Slacks Transformation In Nonlinear Programming, Paul Armand, Dominique Orban

Sultan Qaboos University Journal For Science

In this short paper, we recall the use of squared slacks used to transform inequality constraints into equalities and several reasons why their introduction may be harmful in many algorithmic frameworks routinely used in nonlinear programming. Numerical examples performed with the sequential quadratic programming method illustrate those reasons. Our results are reproducible with state-of-the-art implementations of the methods concerned and mostly serve a pedagogical purpose, which we believe will be useful not only to practitioners and students, but also to researchers.

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Cg Versus Minres: An Empirical Comparison, David Chin-Lung Fong, Michael Saunders Apr 2025

Cg Versus Minres: An Empirical Comparison, David Chin-Lung Fong, Michael Saunders

Sultan Qaboos University Journal For Science

For iterative solution of symmetric systems the conjugate gradient method (CG) is commonly used when A is positive definite, while the minimum residual method (MINRES) is typically reserved for indefinite systems. We investigate the sequence of approximate solutions generated by each method and suggest that even if A is positive definite, MINRES may be preferable to CG if iterations are to be terminated early. In particular, we show for MINRES that the solution norms are monotonically increasing when A is positive definite (as was already known for CG), and the solution errors are monotonically decreasing. We also show that the …

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Solving The Flood Propagation Problem With Newton Algorithm On Parallel Systems, Chefi Triki Apr 2025

Solving The Flood Propagation Problem With Newton Algorithm On Parallel Systems, Chefi Triki

Sultan Qaboos University Journal For Science

In this paper we propose a parallel implementation for the flood propagation method Flo2DH. The model is built on a finite element spatial approximation combined with a Newton algorithm that uses a direct LU linear solver. The parallel implementation has been developed by using the standard MPI protocol and has been tested on a set of real world problems.

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Transform Domain Characterization Of Dual Group Codes Of Cyclic Group Codes Over Elementary Abelian Groups, Adnan Abdulla Zain Apr 2025

Transform Domain Characterization Of Dual Group Codes Of Cyclic Group Codes Over Elementary Abelian Groups, Adnan Abdulla Zain

Sultan Qaboos University Journal For Science

The group of characters of an elementary Abelian group has been used to define duality between its subgroups, which in turn is extended to duality between group codes. The transform domain description of the dual codes of cyclic group codes of length over has been developed in this paper. Several example codes and their duals have been presented also.

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Review Of Health Information Systems In Oman, Mohammed Elhadi, Ahmed Al-Hosni, Khaled Day, Adbullah Al-Hamadani, Abdulrahman Al-Toqi, Nasser Al-Shamli, Ali Al-Hashmi Apr 2025

Review Of Health Information Systems In Oman, Mohammed Elhadi, Ahmed Al-Hosni, Khaled Day, Adbullah Al-Hamadani, Abdulrahman Al-Toqi, Nasser Al-Shamli, Ali Al-Hashmi

Sultan Qaboos University Journal For Science

This paper is a review of Oman's major Health Information Systems (HISs) and their enabling technologies. The work assesses the scope, functionality, security, and interoperability of the used systems. The review aids in achieving the objectives of HIS systems of improving the global quality of health care, attaining increased coordination between health care providers and consumers, promoting the use of guidelines and policies, and improving the speed of simultaneous access and distribution of medicalrecords and other resources. This paper, which can be considered as a building block towards the development of a nation-wide health care system, studies existing systems and …

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