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Generation of OAM Waves and Analysis of Mode Purity for 5G Sub-6 GHz Applications

Computers, Materials & Continua 2023年第1期74卷 2239-2259页

作者： Shehab Khan noor arif Mawardi Ismail mohd Najib mohd Yasin Mohamed Nasrun Osman Nurulazlina Ramli Ali H.Rambe J.Iqbal Advanced Communication Engineering(ACE) Centre of ExcellenceFaculty of Electronic Engineering TechnologyUniversiti Malaysia PerlisKangarPerlisMalaysia Centre for Advanced Electrical&Electronic System(CAEES)Faculty of Engineering Built Environment and Information TechnologySEGi University Petaling JayaSelangorMalaysia Department of Electrical Engineering Universitas Sumatera UtaraMedan20155Indonesia School of Electrical and Electronic Engineering Engineering CampusUniversiti Sains MalaysiaNibong Tebal14300PenangMalaysia Faculty of Engineering&Technology Gomal University29050 kpkPakistan

This article presents the generation of Orbital AngularMomentum(OAM)vortex waves with mode 1 using Uniform Circular Array(UCA)*** different designs,namely,UCA-1(4-element array antenna)and UCA-2(8-element array antenna),were designed and fabricated using FR-4 substrate to generate OAM mode 1 at 3.5 GHz(5G mid-band).The proposed antenna arrays comprised rectangular microstrip patch elements with inset fed *** elements were excited by a carefully designed feeding phase shift network to provide similar output energy at output ports with desired phase shift *** generated OAM waves were confirmed by measuring the null in the bore sight of their 2D radiation patterns,simulated phase distribution and intensity *** measurement results agree well with the simulation ***,a detailed mode purity analysis of the generated OAM waves was carried out considering different *** investigation found that the greater the number of elements,the higher the purity of the generated OAM *** with other previous works,the proposed antenna design of this paper is very simple to design and *** addition,the proposed antennas are compact in design even at lower frequency band with very wide bandwidth to meet the requirements of 5G mid-band applications.

关键词： Orbital angular momentum vortex waves fifth generation wireless communications uniform circular array antenna patch antenna

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Short Communication: Enhancing the Drying Process of Microbial-Based Products with a Dehumidifier

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Advances in Microbiology（微生物学） 2024年第6期 333页

作者： Nor Hidayah Bohari Elya Masya mohd Fishal Ili Bazilah Abd Razak Muhammad Ashraf arif mohd Nasir Cik mohd Rizuan Zainal Abidin

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Modeling sprawl of unauthorized development using geospatial technology: case study in Kuantan district, Malaysia

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International Journal of Digital Earth 2011年第3期4卷 223-238页

作者： Mazlan Hashim Norzailawati mohd noor Maged Marghany Institute of Geospatial Science&Technology(INSTEG) Faculty of Geoinformation Sciences and EngineeringUniversiti Teknologi Malaysia81300 UTM SkudaiJohor BahruMalaysia

The paper explores a framework combining remote sensing and GIS-cellular automata(CA)concepts aimed at improving the modeling of unauthorized land use *** sensing data have been used in urban modeling and analysis,the use of high-resolution remote sensing data in assessing unauthorized development is quite *** work has demonstrated systematic combination utilization of geospatial analyses tools to acquire a new level of information to enable urban modeling and sprawl analysis in assisting urban sustainable *** this study,Kuantan city,Malaysia was selected in simulation of the unauthorized land use with CA concept for a period of 15 years(20002015),with main input time-series land use observation from 1995 to *** 2000 and 2005 land use input was also used as calibrated and test assessment of the *** results show excellent agreement between in-situ changes of the unauthorized land use classes and the corresponding simulated classes within the same *** conclusion,CA model can lead to new levels of understanding of how urban areas grow and change as in view of digital earth aspiration.

关键词： cellular automata sprawl remote sensing GIS urban simulation

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Development of niobium-promoted cobalt catalysts on carbon nanotubes for Fischer-Tropsch synthesis

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Journal of Natural Gas Chemistry 2011年第6期20卷 659-663页

作者： Sardar Ali noor Asmawati mohd Zabidi Duvvuri Subbarao Department of Chemical Engineering Universiti Teknologi PETRONASBandar Seri Iskandar31750 TronohPerakMalaysia Department of Fundamental and Applied Sciences Universiti Teknologi PETRONASBandar Seri Iskandar31750 TronohPerakMalaysia

Cobalt-based catalysts were prepared by a wet impregnation method on carbon nanotubes （CNTs） support and promoted with *** were characterized by nitrogen adsorption,TEM,XRD,TPR,TPO and *** of niobium increased the dispersion of cobalt but decreased the catalysts ***-Tropsch synthesis （FTS） was carried out in a fixed-bed microreactor at 543 K,1 atm and H2/CO=2 for 5 *** of niobium enhanced the C5＋ hydrocarbons selectivity by 39% and reduced methane selectivity by 59%.These effects were more pronounced for 0.04%Nb/Co/CNTs catalyst,compared with those observed for other niobium compositions.

关键词： CNTs cobalt niobium Fischer-Tropsch synthesis

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Synthesis and characterization of niobium-promoted cobalt/iron catalysts supported on carbon nanotubes for the hydrogenation of carbon monoxide

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燃料化学学报 2016年第7期44卷 815-821页

作者： Zahra Gholami noor Asmawati mohd Zabidi Fatemeh Gholami Mohammadtaghi Vakili Centralized Analytical Laboratory Universiti Teknologi PETRONAS Department of Fundamental and Applied Sciences Universiti Teknologi PETRONAS Department of Mechanical Engineering Faculty of EngineeringUniversity of Malaya School of Industrial Technology Universiti Sains Malaysia

Bimetallic Co /Fe catalysts supported on carbon nanotubes( CNTs) were prepared,and niobium( Nb) was added as promoter to the 70 Co ∶30Fe /CNT catalyst. The physicochemical properties of the catalysts were characterized,and the catalytic performances were analyzed at the same operation conditions( H_2 ∶CO( volume ratio) = 2 ∶1,p = 1 MPa,and t = 260 ℃) in a tubular fixed-bed microreactor system. The addition of Nb to the bimetallic catalyst decreases the average size of the oxide nanoparticles and improves the reducibility of the bimetallic catalyst. Evaluation of the catalyst performance in a Fischer-Tropsch reaction shows that the catalyst results in high selectivity to methane,and the selectivity to C_(5+) increased slightly in the bimetallic catalyst unlike that in the monometallic catalysts. The addition of 1% Nb to the bimetallic catalyst increases CO conversion and selectivity to C_(5+). Meanwhile,a decrease in methane selectivity is observed.

关键词： Fischer-Tropsch synthesis bimetallic catalyst niobium promoter carbon nanotubes

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Effect of Synthesis Technique and Carbonate Content on the Crystallinity and Morphology of Carbonated Hydroxyapatite

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Journal of Materials Science & Technology 2013年第8期29卷 761-764页

作者： Chia Ching Kee Hanafi Ismail Ahmad Fauzi mohd noor School of Materials and Mineral Resources Engineering Engineering CampusUniversiti Sains Malaysia14300 Nibong TebalPenangMalaysia

The syntheses of nanosized carbonated hydroxyapatite （CHA） were performed by comparing dropwise and direct pouring of acetone solution of Ca（NO3）2·4H2O into mixture of （NH4）2HPO4 and NH4HCO3 at room temperature controlled at pH 11. Direct pouring method was later applied to study the increment of carbonate content in syntheses. The as-synthesized powders were characterized by various characterization techniques. The crystallographic results of the produced powders were obtained from X-ray diffraction analysis, whilst the carbonate content in the produced powders was determined by the CHNS/O elemental analyzer. Fourier transform infrared analysis confirmed that the CHA powders formed were B-type. Field emission scanning electron microscopy revealed that the powders were highly agglomerated in nanosized range and hence energy filtered transmission electron microscopy was employed to show elongated particles which decreased with increasing carbonate content.

关键词： Bioceramic Carbonated hydroxyapatite Dropwise Direct pouring

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Intuitionistic fuzzy DEMATEL for developing causal relationship of water security

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International Journal of Intelligent Computing and Cybernetics 2023年第3期16卷 520-544页

作者： Lazim Abdullah Herrini mohd Pouzi noor Azzah Awang Universiti Malaysia Terengganu TerengganuMalaysia Universiti Teknologi MARA Shah AlamMalaysia

Purpose–This study aims to develop a cause-effect relationship between criteria that contribute to water security using the Intuitionistic Fuzzy-Decision-Making Trial and Evaluation Laboratory(IF-DEMATEL)*** from the typical DEMATEL which utilizes crisp numbers,this modification introduces intuitionistic fuzzy numbers(IFNs)to enhance judgments in a group decision-making *** particular,the linguistic variables used in IF-DEMATEL are defined using the concept of three-tuple of ***/methodology/approach–Data with the linguistic variable“influence”were collected from a group of experts in water security via personalunstructured *** water security criteria are considered in this *** software was employed to execute the computational procedures of the IF-DEMATEL *** is anticipated that by taking into account the hesitation degree of IFNs will reflect the scenario in real life,which could lead to precise ***–Theresultsshowthat“Over-Abstraction”,“SaltwaterIntrusion”and“LimitedInfrastructures”are the cause criteria that contribute to water *** addition,the relationship map of influence shows that“Water Pollution”and“Rapid Urbanization”are the most vulnerable criteria as these two criteria are most easily affected by other criteria in a unidirectional ***–It is anticipated that these findings will serve as useful references for water security management and ***/value–The present study makes a noteworthy contribution to the modification of DEMATEL where three-tuple of intuitionistic fuzzy numbers are considered in the *** present study also provides additional evidence with respect to factors that contribute to water security.

关键词： Decision making Intuitionistic fuzzy set DEMATEL Water security Relationship of influence

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Immune Dysfunction in Cirrhosis

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Journal of Clinical and Translational Hepatology 2017年第1期5卷 50-58页

作者： mohd Talha noor Piyush Manoria Department of Gastroenterology Sri Aurobindo Medical College and Post Graduate InstituteIndoreIndia

Cirrhosis due to any etiology disrupts the homeostatic role of liver in the ***-associated immune dysfunction leads to alterations in both innate and acquired immunity,due to defects in the local immunity of liver as well as in systemic ***-associated immune dysfunction is a dynamic phenomenon,comprised of both increased systemic inflammation and immunodeficiency,and is responsible for 30%*** also plays an important role in acute as well as chronic *** paralysis can accompany it,which is characterized by increase in antiinflammatory cytokines and suppression of proinflammatory *** is also presence of increased gut permeability,reduced gut motility and altered gut flora,all of which leads to increased bacterial *** increased bacterial translocation and consequent endotoxemia leads to increased blood stream bacterial infections that cause systemic inflammatory response syndrome,sepsis,multiorgan failure and *** gut microbiota of cirrhotic patients has more pathogenic microbes than that of noncirrhotic individuals,and this disturbs the homeostasis and favors gut *** diagnosis and treatment of such infections are necessary for better *** have reviewed the various mechanisms of immune dysfunction and its consequences in *** the exact pathophysiology of immune dysfunction will help treating clinicians in avoiding its complications in their patients and can lead to newer therapeutic interventions and reducing the morbidity and mortality rates.

关键词： Cirrhosis Immune dysfunction Inflammation Liver disease

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Age factor affects reading acuity and reading speed in attaining text information

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International Journal of Ophthalmology(English edition) 2019年第7期12卷 1170-1176页

作者： Ai-Hong Chen Nursyairah mohd Khalid noor Halilah Buari Optometry Faculty of Health SciencesUniversiti Teknologi MARA

AIM: To investigate the effect of age on reading acuity and reading speed in attaining text information in healthy ***: Reading acuity, critical print size, reading speed and maximum reading speed were measured in groups of 40 children (8 to 12 years old), 40 teenagers (13 to 19 years old), 40 young adults (20 to 39 years old), and 40 adults (40 years old and above) using the Buari-Chen Malay Reading Chart [contextual sentences (CS) set and random words (RW) set] in a cross-sectional study ***: Reading acuity was significantly improved by 0.04 logMAR for both CS set and RW set from children to teenagers, then gradually worsened from young adults to adults (CS set: 0.06 logMAR;RW set: 0.08 logMAR). Critical print size for children showed a significant improvement in teenagers (CS set: 0.14 logMAR;RW set: 0.07 logMAR), then deteriorated from young adults to adults by 0.09 logMAR only for CS set. Reading speed significantly increased from children to teenagers,[CS set: 46.20 words per minute (wpm);RW set: 42.06 wpm], then stabilized from teenagers to young adults, and significantly reduced from young adults to adults (CS set: 28.58 wpm;RW set: 24.44 wpm). Increment and decrement in maximum reading speed measurement were revealed from children to teenagers (CS set: 39.38 wpm;RW set: 43.38 wpm) and from young adults to adults (CS set: 22.26 wpm;RW set: 26.31 wpm) ***: The reference of age-related findings in term of acuity and speed of reading should be incorporated in clinical practice to enhance reading assessment among healthy eyes population.

关键词： reading acuity critical print size readingspeed maximum reading speed age effect

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Numerical Simulations of One-Directional Fractional Pharmacokinetics Model

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Computers, Materials & Continua 2022年第12期73卷 4923-4934页

作者： Nursyazwani Mohamad noor Siti Ainor mohd Yatim Nur Intan Raihana Ruhaiyem School of Distance Education Universiti Sains MalaysiaUSM PenangPenang11800Malaysia School of Computer Science Universiti Sains MalaysiaUSM PenangPenang11800Malaysia

In this paper,we present a three-compartment of pharmacokinetics model with irreversible rate *** compartment consists of arterial blood,tissues and venous ***’s principle and the law of mass action were used to develop the model based on the diffusion *** model is modified into a fractional pharmacokinetics model with the sense of Caputo *** existence and uniqueness of the model are investigated and the positivity of the model is *** behaviour of the model is investigated by implementing numerical algorithms for the numerical solution of the system of fractional differential *** software is used to plot the graphs for illustrating the variation of drug concentration concerning ***,the numerical simulations of the model are presented for different values ofαwhich verified the theoretical ***,we also observed the pattern of the simulations at the three-compartment of the model by using different values of initial conditions.

关键词： Pharmacokinetics model Irreversible rate Fractional order Numerical simulations

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