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Multi-Band Bandpass Filter Using Novel Topology for Next-Generation IoT Wireless Systems

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Computers, Materials & Continua 2022年第12期73卷 4819-4832页

作者： Muhammad Faisal Sohail khalid Departmnet of Electrical Engineering Riphah International UniversityIslamabad44000Pakistan

The design of single-and quad-band Bandpass Filter(BPF)topology has been presented in this paper for next-generation Internet of Things(IoT)*** main topology is constructed using the Split Ring Resonator(SRR),separated by the Anti-Parallel Coupled Line Structure(APCLS).A detailed analysis of APCLS has been presented,which is further used to construct the single-and quad-band *** single-band BPF design consists of SRR loaded with *** developed single-band BPF displays a dual-mode response with a center frequency of 2.65 GHz and a measured fractional bandwidth of 17.17%.Moreover,a quad-band bandpass filter has been achieved using the same topology with minor modification in the SRR and APCLS electrical *** developed quad-band BPF generates a dual-mode response having center frequencies of 1.2,2.4,3.5,and 4.7 GHz with the measured fractional bandwidth of 13%,26%,16%,and 5%,*** prototypes have been fabricated on the highfrequency substrate to validate the proposed *** high rejection in the stopbands region,little in-band insertion loss,and very selective passband have been measured for single-and quad-band *** measured and simulated results are well correlated.

关键词： Single-band BPF quad-band BPF anti-parallel coupled line structure split ring resonator internet of things

Additive Preservers of Drazin Invertible Operators with Bounded Index

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Acta Mathematica Sinica,English Series 2017年第9期33卷 1225-1241页

作者： Mourad OUDGHIRI khalid SOUILAH Departement Math-Info Labo LAGAFaculte des SciencesUniversite Mohammed Premier60000 OujdaMaroc

Let B（X） be the algebra of all bounded linear operators on an infinite-dimensional complex or real Banach space X. Given an integer n 〉 1, we show that an additive surjective map Ф on B（X） preserves Drazin invertible operators of index non-greater than n in both directions if and only if Ф is either of the form Ф（T） = aATA-1 or of the form Ф（T） = aBT＊B-1 where a is a non-zero scalar, A ： X → X and B ： X＊ → X are two bounded invertible linear or conjugate linear operators.

关键词： Linear preserver problems Drazin inverse ascent descent

Evaluation of NFC-Guidable System to Manage Polypharmacy in Elderly Patients

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Computer Systems Science & Engineering 2022年第5期41卷 445-460页

作者： khalid Alzahrani Mrim Alnfiai Department of Clinical Laboratories Sciences College of Applied Medical SciencesTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Information Technology College of Computers and Information TechnologyTaif UniversityTaif P.O.Box 11099Taif21944Saudi Arabia

A complete and thorough understanding by patients of their prescriptions is one of the most critical components of a successful treatment *** unfamiliar with the intricacies of prescribed medication can cause serious health risks due to not adhering to prescription instructions or noting potential drug interactions,which can lead to life-threatening *** face communication barriers(including non-English speaking patients),lack of time,lack of knowledge,workload,and frequent interruption when dispensing medicines often preventing them from providing the necessary guidance to their *** minimize this risk,an NFC-Guidable polypharmacy system was developed integrating Near Field Technology(NFC)into prescription *** intention being,to automate prescription identification for elderly patients in hospitals and primary health care(PHC)centers where Arabic is their native language and patients have five or more prescriptions at a *** system provides prescription information such as name,expiration date based on the Islamic calendar,appropriate dosage,the correct time for a dose,contraindication,and other relevant instructions in *** objectives of the system are to improve patient safety and enhance the quality of prescription dispensing for elderly and non-English speaking *** evaluation study with polypharmacy elderly patients and pharmacists is conducted to understand the perception and acceptance of the system by both *** strengths and weaknesses of the system as well as suggestions for improvement from participants were also *** study results indicate that the system helps patients to avoid misuse of sensitive medication and authenticates their prescribed prescription drugs before taking *** system also assists pharmacists in improving the efficiency of dispensing medication and streamline ***,the application was well received by both patients and ***,NFC technol

关键词： NFC health elder patients pharmacists language

Development of Non-ABO Red Blood Cell Alloantibodies in Patient Undergoing Allogeneic Haematopoietic Stem Cell Transplant

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Case Reports in Clinical Medicine 2024年第5期13卷 162-170页

作者： Ahmed Alsuhaibani khalid Batarfi Ahmed Alharbi Haya Alwasel Abdullah Alenazi Abdulmohsen Alotaibi Jalal Hassan Rayyan Alotaibi Hajer Aziz Nourah Alharethi Sara Alobaidi Maram Alonayzan Sanad Alharthi Majd Alanazi Sarah Alotaibi Ahmed Shareefi Bandar Alqahtani Department of Laboratory and Pathology King Abdulaziz Medical City of National Guard Riyadh Saudi Arabia

Alloantibodies that are non ABO Alloimmunization to protein antigens happens only after exposure, in contrast to ABO isohaemagglutinins, which are present naturally, even in the absence of prior exposure. It is recognized that while non-ABO RBC antibodies are less common than ABO antibodies, they generate essentially the same issues that lead to unfavorable clinical results. If non-ABO alloantibodies are identified early on, these issues related complications may be avoided This call for an in-depth understanding of the recipient and donor’s ABO-Rh grouping, antibody screening, and the phenotype of certain antigens. Equally important, the temporal association time between transplantation and hemolysis can help identify the underlying mechanism of hemolysis and direct appropriate management. Therefore, for that, it is crucial to identify the etiology of post-HSCT anemia for prevention and therapy, in addition to a thorough grasp of the mechanism of anemia in non-ABO-incompatible HSCT and the temporal link between HSCT and anemia. Finding the cause of post-HSCT anemia is essential for prevention and therapy, in addition to a thorough grasp of the mechanism of anemia in non-ABO-incompatible HSCT and the temporal link between HSCT and anemia. Therefore, for that, it is crucial to identify the etiology of post-HSCT anemia. In this case report review, we would like to highlight the vital role of transfusion medicine services and stem cell clinical teams in paying particular attention to the clinical significance of non-ABO alloantibodies involved to avoid causing overt hemolysis of incompatible donor RBCs or delayed erythropoiesis. Considering the fact that some of the Haematopoietic stem cell transplant centers do not give an attention to the other non-ABO RBC antigens.

关键词： Haematopoietic Stem Cell Transplant (HSCT) Non-ABO Red Blood Cell Antibodies Alloantibodies

Measurement and correlation of solubility of diosmin in four pure solvents and β-cyclodextrin solution at 298.15K to 333.15K

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Chinese Journal of Chemical Engineering 2015年第5期23卷 812-815页

作者： Md khalid Anwer Faiyaz Shakeel Department of Pharmaceutics College of Pharmacy Salman Bin Abdulaziz University Center of Excellence in Biotechnology Research King Saud University Department of Pharmaceutics College of Pharmacy King Saud University

The aim of present study was to measure and correlate the solubility of poorly water-soluble flavonoid diosmin in water, ethanol, isopropyl alcohol （IPA）, polyethylene glycol-400 （PEG-400） and β-cyclodextrin （β-CD） aqueous solution （0.02 mol·L^-1 ）. The solubility of diosmio was measured using the shake flask method from （298.15 to 333.15） K at atmospheric pressure. The experimental solubilities of diosmin were regressed by the modified Apelblat model with a relative deviation in the range of 0.048% to 5.940%. The correlation coefficients were observed in the range of 0.9957 to 0.9995. The solubility of diosmin was found to be increased with temperature in all sample matrices investigated. The mole fraction solubility of diosmin was found to be higher in 5-CD aqueous solution and PEG-400 as compared to water, ethanol and IPA. Based on solubility data of present study, diosmin was considered as practically insoluble in water, insoluble in ethanol ＆ IPA and soluble in PEG- 400 and β-CD aqueous solution.

关键词： Apelblat model Cyclodextrin Diosmin Solubility Thermodynamics

Glassy behaviour of random field Ising spins on Bethe lattice in external magnetic field

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Chinese Physics B 2011年第6期20卷 416-425页

作者： khalid Bannora Galal Ismail Wafaa Hassan Mathematics Department Faculty of Science Zagazig University Mathematics and Physics Department Faculty of Engineering Port Said Branch of Suez Canal University

The thermodynamics and the phase diagram of random field Ising model （RFIM） on Bethe lattice are studied by using a replica trick. This lattice is placed in an external magnetic field （B）. A Gaussian distribution of random field （hi） with zero mean and variance （hi2 = H2RF is considered. The free-energy （F）, the magnetization （M） and the order parameter （q） are investigated for several values of coordination number （z）. The phase diagram shows several interesting behaviours and presents tricritical point at critical temperature Tc = J/k and when HRF = 0 for finite z. The free-energy （F） values increase as T increases for different intensities of random field （HRE） and finite z. The internal energy （U） has a similar behaviour to that obtained from the Monte Carlo simulations. The ground state of magnetization decreases as the intensity of random field HRF increases, The ferromagnetic （FM） paramagnetic （PM） phase boundary is clearly observed only when z →∞. While FM PM-spin glass （SG） phase boundaries are present for finite z. The magnetic susceptibility （X） shows a sharp cusp at Tc in a small random field for finite z and rounded different peaks on increasing HRF.

关键词： random field replica trick coordination number order parameter susceptibility and phase diagram

Glassy phase and thermodynamics for random field Ising model on spherical lattice in magnetic field

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Chinese Physics B 2010年第10期19卷 525-533页

Phase diagram and thermodynamic parameters of the random field Ising model （RFIM） on spherical lattice are studied by using mean field theory. This lattice is placed in an external magnetic field （B）. The random field （hi） is assumed to be Gaussian distributed with zero mean and a variance （hi2） = HRF2. The free energy （F）, the magnetization （M） and the order parameter （q） are calculated. The ferromagnetic （FM） spin-glass （SG） phase transition is clearly observed. The critical temperature （Tc） is computed under a critical intensity of random field HRF = V/2/πJ. The phase transition from FM to paramagnetic （PM） occurs at TC = J/k in the absence of magnetic field. The critical temperature decreases as HRF increases in the phase boundary of FM-to-SG. The magnetic susceptibility （X） shows a sharp cusp at TC and the specific heat （C） has a singularity in small random field. The internal energy （U） has a similar behaviour to that obtained from the Monte Carlo simulation.

关键词： random field mean field theory magnetization specific heat and phase diagram

Mutational analysis of hepatitis E virus ORF1 'Y-domain' : Effects on RNA replication and virion infectivity

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World Journal of Gastroenterology 2017年第4期23卷 590-602页

作者： Mohammad khalid Parvez Department of Pharmacognosy King Saud University College of PharmacyRiyadh 11451Saudi Arabia

AIMTo investigate the role of non-structural open reading frame 1 “Y-domain” sequences in the hepatitis E virus (HEV) life *** of human HEV Y-domain (amino acid sequences 216-442) and closely-related viruses were analyzed in silico. Site-directed mutagenesis of the Y-domain (HEV SAR55) was carried out and studied in the replicon-baculovirus-hepatoma cell model. In vitro transcribed mRNA (pSK-GFP) constructs were transfected into S10-3 cells and viral RNA replicating GFP-positive cells were scored by flow cytometry. Mutant virions’ infectivity was assayed on naïve HepG2/C3A *** silico analysis identified a potential palmitoylation-site (C336C337) and an α-helix segment (L410Y411S412W413L414F415E416) in the HEV Y-domain. Molecular characterization of C336A, C337A and W413A mutants of the three universally conserved residues showed non-viability. Further, of the 10 consecutive saturation mutants covering the entire Y-domain nucleotide sequences (nts 650-1339), three constructs (nts 788-994) severely affected virus replication. This revealed the indispensability of the internal sequences but not of the up- or downstream sequences at the transcriptional level. Interestingly, the three mutated residues corresponded to the downstream codons that tolerated saturation mutation, indicating their post-translational functional/structural essentiality. In addition, RNA secondary structure prediction revealed formation of stable hairpins (nts 788-994) where saturation mutation drastically inhibited virion *** is the first demonstration of the critical role of Y-domain sequences in HEV life cycle, which may involve gene regulation and/or membrane binding in intracellular replication complexes.

关键词： Hepatitis E virus Open reading frame 1 Y-domain Palmitoylation α -helix

Distributed cooperative control of autonomous multi-agent UAV systems using smooth control

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Journal of Systems Engineering and Electronics 2020年第6期31卷 1297-1307页

作者： BELKACEM Kada MUNAWAR khalid MUHAMMAD Shafique Shaikh Department of Aerospace Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Electrical and Computer Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia

This paper addresses the cooperative control problem of multiple unmanned aerial vehicles(multi-UAV)***,a new distributed consensus algorithm for second-order nonlinear multi-agent systems(MAS)is formulated under the leader-following *** algorithm provides smooth input signals to the agents’control channels,which avoids the chattering effect generated by the conventional sliding mode-based control ***,a new formation control scheme is developed by integrating smooth distributed consensus control protocols into the geometric pattern model to achieve three-dimensional formation *** Lyapunov theory is used to prove the stability and convergence of both distributed consensus and formation *** effectiveness of the proposed algorithms is demonstrated through simulation results.

关键词： cooperative control distributed consensus three-dimensional formation control multiple-UAV system