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Indirect Vector Control of Linear Induction Motors Using Space Vector Pulse Width Modulation

Computers, Materials & Continua 2023年第3期74卷 6263-6287页

作者： Arjmand Khaliq Syed abdul rahman Kashif Fahad Ahmad Muhammad Anwar Qaisar Shaheen Rizwan Akhtar Muhammad Arif Shah Abdelzahir Abdelmaboud Electrical Engineering Department University of Engineering and TechnologyLahore54700Pakistan Department of Basic Sciences Deanship of Common First YearJouf UniversitySakakaAljouf72341Saudi Arabia Department of Information Science Division of Science and TechnologyUniversity of EducationLahore54000Pakistan Department of Computer Science and Information Technology The Islamia University of BahawalpurRahim Yar Khan Sub CampusPakistan Department of IT and Computer Science Pak-Austria Fachhochschule Institute of Applied Sciences and TechnologyHaripurPakistan Department of Information Systems King Khalid UniversityMuhayel Aseer61913Saudi Arabia

Vector control schemes have recently been used to drive linear induction motors(LIM)in high-performance *** trend promotes the development of precise and efficient control schemes for individual *** research aims to present a novel framework for speed and thrust force control of LIM using space vector pulse width modulation(SVPWM)*** framework under consideration is developed in four *** begin,MATLAB Simulink was used to develop a detailed mathematical and electromechanical *** research presents a modified SVPWM inverter control *** tuning the proportional-integral(PI)controller with a transfer function,optimized values for the PI controller are *** the subsystems mentioned above are integrated to create a robust simulation of the LIM’s precise speed and thrust force control *** reference speed values were chosen to evaluate the performance of the respective system,and the developed system’s response was verified using various data *** the low-speed range,a reference value of 10m/s is used,while a reference value of 100 m/s is used for the high-speed *** speed output response indicates that themotor reached reference speed in amatter of seconds,as the delay time is between 8 and 10 *** maximum amplitude of thrust achieved is less than 400N,demonstrating the controller’s capability to control a high-speed LIM with minimal thrust *** to the controlled speed range,the developed system is highly recommended for low-speed and high-speed and heavy-duty traction applications.

关键词： Space vector pulse width modulation linear induction motor proportional-integral controller indirect vector control electromechanical dynamic modeling

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Screening the synergy of sodium dodecylbenzenesulfonate and carboxymethyl cellulose for surfactant-polymer flooding

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Petroleum Research 2022年第3期7卷 308-317页

作者： Suriatie Mat Yusuf Radzuan Junin Mohd Akhmal Muhamad Sidek Augustine Agi Mohd Fazril Irfan Ahmad Fuad nor Roslina Rosli norazah Abd rahman Effah Yahya nor Adilah Muhamad Soffian Wong Muhammad Hazim Mustaza Department of Petroleum Engineering School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310Johor BahruMalaysia Institute for Oil and Gas Universiti Teknologi Malaysia81310Johor BahruMalaysia School of Chemical Engineering College of EngineeringUniversiti Teknologi MARA40450Shah AlamSelangorMalaysia

Carboxymethyl cellulose(CMC)has emerged in oil and gas industries as a superior substitution to the conventional HPAM and xanthan gum(XG)for high viscosity polymer flooding *** this study,the combined effect of conventional surfactant,sodium dodecylbenzenesulfonate(SDBS)and CMC for potential surfactant-polymer(SP)flooding in enhanced oil recovery(EOR)has been ***,SDBS–CMC interaction and the functional groups present in CMC were appropriately *** presence of various C–O bonds signifies the existence of carboxymethyl group which greatly influence the rheological properties of CMC *** behaviour of SDBS–CMC was characterized by their viscosity,shear rate,solubilization,wettability,and surface *** flooding utilizing SDBS-CMC was performed and compared to commercial SDBS-XG SP *** results indicate several SDBS-CMC combinations are favourable for EOR *** viscosity shows direct relationship with CMC ***,at any given SDBS concentrations,significant increment was observed at 0.3 wt%and ***,the trend displayed inconclusive relation to SDBS *** of the SDBS-CMC combinations generate Winsor III emulsions particularly at CMC of 0.2 and 0.3 wt%,while Type II were observed in few *** CMC concentrations increased the contact angle,while gradual reductions were observed with SDBS *** gradual reduction in surface tension was highly influenced by the addition of CMC rather than SDBS.A novel combination of 0.3 wt%SDBS and 0.4 wt%CMC possessed an encouraging criterion in term of viscosity,solubilization,and surface tension reduction for EOR *** experiment from several SDBS-CMC combinations proved to recover additional oil ranging 16.4–20.2%of oil initially in place(OIIP).The trend in incremental oil recovery is similar to that of when utilising SDBS-XG.

关键词： Carboxymethyl cellulose Sodium dodecylbenzenesulfonate Enhanced oil recovery Surfactant-polymer flooding

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Effects of Planting Density of Rubber Tree Clone(RRIM 2020 Clone and RRIM 2025 Clone)Wood to Particleboard Properties

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Journal of Renewable Materials 2022年第7期10卷 1951-1960页

作者： Juliana abdul Halip Syeed SaifulAzry Osman Al-Edrus Seng Hua Lee Paridah Md Tahir nor Yuziah Mohd Yunus Mohd Sapuan Salit Ahmad Ilyas Rushdan Institute of Tropical Forestry and Forest Products(INTROP) Universiti Putra Malaysia(UPM)Serdang43400Malaysia Faculty of Technology Management and Business Universiti Tun Hussein Onn Malaysia(UTHM)Parit Raja86400Malaysia Department of Wood Industry Faculty of Applied SciencesUniversiti Teknologi MARA(UiTM)Bandar Tun Abdul RazakJengkaPahang26400Malaysia School of Chemical and Energy Faculty of EngineeringUniversiti Teknologi MalaysiaJohor Bahru81310Malaysia Centre for Advanced Composite Materials Universiti Teknologi MalaysiaJohor Bahru81310Malaysia

The depletion of log resources encourages research into alternative ways to sustain the wood ***,the 4-year-old Rubber Research Institute of Malaysia(RRIM)clones series,RRIM 2020 and RRIM 2025,were chosen as potential raw materials for particleboard in this *** purpose of this study was to assess the effects of planting density and rubber tree clones on the mechanical and physical properties of single-layer *** planting densities used were low,moderate-low,moderate-high,and high,representing 500,1000,1500,and 2000 trees/ha,*** to manufacturing,the RRIM 2000 series clone trees were harvested,cut,chipped,flaked,and *** mechanical and physical properties were evaluated in accordance with the Japanese Industrial Standard(JIS A 5908-2003).The findings revealed that both planting density and clone had a significant impact on the mechanical and physical properties of particleboard with a thickness of 10 mm and a density of 700 kg/*** 2020 specimens with low planting density had superior modulus of elasticity(MOE),modulus of rupture(MOR),and internal bonding(IB)values of 2415,19,and 1.7 MPa,***,moderate-low planting density demonstrated the lowest thickness swelling(TS)and water absorption(WA)values and was comparable to control particleboard from commercial clone Prang Besar(PB),*** terms of rubber clones,RRIM 2020 particleboard met the minimum requirements of the JIS standard for mechanical properties and outperformed RRIM *** study recommended a low planting density of 500 trees/ha and the RRIM 2020 clone as a suitable raw material for particleboard manufacturing with a ten percent urea formaldehyde resin content.

关键词： Rubberwood RRIM 2020 RRIM 2025 mechanical physical urea formaldehyde

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Fusarium wilt of banana:Current update and sustainable disease control using classical and essential oils approaches

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Horticultural Plant Journal 2023年第1期9卷 1-28页

作者： Abubakar Abubakar Ismaila Khairulmazmi Ahmad Yasmeen Siddique Muhammad Aswad abdul Wahab abdulaziz Bashir Kutawa Adamu abdullahi Syazwan Afif Mohd Zobir Arifin Abdu Siti nor Akmar abdullah Department of Plant Protection Faculty of AgricultureUniversiti Putra Malaysia(UPM)SerdangSelangor 43400Malaysia Department of Integrated Science School of Secondary Education(Science)Federal College of Education(Technical)BichiP.M.B 3473Kano StateNigeria Department of Agriculture Technology Faculty of AgricultureUniversiti Putra Malaysia(UPM)SerdangSelangor 43400Malaysia Department of Plant Science and Biotechnology Faculty of Life ScienceFederal University Dutsin-MaP.M.B 5001Dutsin-MaKatsina StateNigeria Laboratory of Sustainable Agronomy and Crop Protection Institute of Plantation Studies(IKP)Universiti Putra Malaysia(UPM)SerdangSelangor 43400Malaysia Department of Forest Management and Biodiversity Faculty of Forestry and EnvironmentUniversiti Putra Malaysia(UPM)SerdangSelangor 43400Malaysia Department of Biological Sciences Faculty of ScienceSokoto State University8 Birnin Kebbi RoadSokoto StateNigeria

Fusarium species were reported to produce *** are superficial societies of microbes bounded and endangered by being situated or taking place outside a cell or *** most destructive fungal diseases caused by phytopathogens are as a result of biofilms *** wilt of banana(Panama disease)is caused by a soil-borne pathogen called Fusarium oxysporum *** oxysporum occurs in a form of a species complex(FOSC)which encompasses a crowd of *** genetic factor transfer may donate to the observed assortment in pathogenic strains,while sexual reproduction is unknown in the *** wilt is a notorious disease on several crops *** loss caused by this pathogen is huge,and significant to destroy crop yields annually,thereby affecting the producer countries in various continents of the *** disease is also resistant to various synthetic chemical ***,excessive use of synthetic fungicides during disease control could be lethal to humans,animals,and *** calls for alternative eco-friendly management of this disease by targeting the biofilms formation and finally suppressing this devastating *** this review,we,therefore,described the damage caused by Fusarium wilt disease,the concept of filamentous fungal biofilms,classical control strategies,sustainable disease control strategies using essential oils,and prevention and control of vegetables Fusarium wilt diseases.

关键词： Banana Fusarium oxysporum Fusarium wilt disease Antibiofilm Antifungal Essential oils

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COVID-19:cardiovascular manifestations-a review of the cardiac effects

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Journal of Geriatric Cardiology 2022年第3期19卷 245-250页

作者： Taha Hatab Mohamad Bahij Moumneh abdul rahman Akkawi Mohamad Ghazal Samir E.Alam Marwan M.Refaat Department of Internal Medicine Division of CardiologyAmerican University of Beirut Medical CenterBeirutLebanon

The coronavirus first reported in China in November 2002 in the form of atypical pneumonia known as the severe acute respiratory syndrome (SARS).[1] The virus then appeared in 2012 in Saudi Arabia as the Middle East respiratory syndrome (MERS).[2] The year 2020 witnessed a novel β-coronavirus related to the previous detected viruses.[3] It was the severe acute respiratory syndrome coronavirus 2 (SARS-Co V-2)-a positive single stranded RNA virus.

关键词： acute cardiac respiratory

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Guidelines from an expert panel for the management of diabetic macular edema in the Malaysian population

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International Journal of Ophthalmology(English edition) 2023年第5期16卷 712-720页

作者： nor Fariza Ngah nor Asiah Muhamad Shelina Oli Mohamed Roslin Azni abdul Aziz Nur Hasnah Ma’amor nor Azita Ahmad Tarmidzi Hanizasurana Hashim Hamisah Ishak Wan norliza Wan Muda Rosiah Muda Azian Adnan Rafidah Md Saleh Wong Hon Seng Nurfahzura Mohd Jamil Tara Mary George Adrian Koh Institute for Clinical Research National Institutes of HealthMinistry of HealthSelangor 40170Malaysia Department of Ophthalmology Shah Alam HospitalMinistry of HealthSelangor 40000Malaysia Sector for Evidence-based Healthcare National Institutes of HealthMinistry of HealthSelangor 40170Malaysia Department of Ophthalmology Kuala Lumpur HospitalMinistry of HealthFederal Territory 50586Malaysia Department of Ophthalmology Selayang HospitalMinistry of HealthSelangor 61800Malaysia Department of Ophthalmology Tengku Ampuan Afzan HospitalMinistry of HealthPahang 25100Malaysia Department of Ophthalmology Sultanah Nur Zahirah HospitalMinistry of HealthKuala Terengganu 20400Malaysia KPJ Selangor Specialist Hospital Selangor 40300Malaysia Sultan abdul Aziz Shah Hospital Selangor 43400Malaysia Gleneagles Kuala Lumpur Federal Territory 50450Malaysia Department of Ophthalmology Sungai Buloh HospitalMinistry of HealthSelangor 47000Malaysia Sunway Medical Centre Selangor 47500Malaysia Camden Medical Centre Singapore 248649Singapore

AIM:To derive a Malaysia guideline and consensus as part of the Malaysia Retina Group's efforts for diagnosis,treatment,and best practices of diabetic macular edema(DME).The experts'panel suggests that the treatment algorithm to be divided into groups according to involvement the central *** purpose of DME therapy is to improve edema and achieve the best visual results with the least amount of treatment ***:On two different occasions,a panel of 14 retinal specialists from Malaysia,together with an external expert,responded to a questionnaire on management of DME.A consensus was sought by voting after compiling,analyzing and discussion on first-phase replies on the round table discussion.A recommendation was deemed to have attained consensus when 12 out of the 14 panellists(85%)agreed with ***:The terms target response,adequate response,nonresponse,and inadequate response were developed when the DME patients'treatment responses were first *** panelists reached agreement on a number of DME treatment-related issues,including the need to classify patients prior to treatment,firstline treatment options,the right time to switch between treatment modalities,and side effects associated with *** this agreement,recommendations were derived and a treatment algorithm was ***:A detail and comprehensive treatment algorithm by Malaysia Retina Group for the Malaysian population provides guidance for treatment allocation of patients with DME.

关键词： diabetic macular edema guidelines consensus diabetic retinopathy Malaysia

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Strain Sensor Based on Embedded Fiber Bragg Grating in Thermoplastic Polyurethane Using the 3D Printing Technology for Improved Sensitivity

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Photonic Sensors 2022年第3期12卷 68-78页

作者： Harith AHMAD Mohamad Ashraff ALIAS Mohammad Faizal ISMAIL nor Najwa ISMAIL Muhammad Khairol Annuar ZAINI Kok Sing LIM Gilberto BRAMBILLA Kenneth T.V.GRATTAN B.MAzizur rahman Photonics Research Centre University of MalayaKuala Lumpur 50603Malaysia Department of Physics Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK School of Mathematics Computer Science and EngineeringCity University of LondonLondon EC1V 0HBUK

A new and easy-to-fabricate strain sensor has been developed,based on fiber Bragg grating(FBG)technology embedded into a thermoplastic polyurethane filament using a 3-dimensional(3D)*** advantage of the flexibility and elastic properties of the thermoplastic polyurethane material,the embedding of the FBG provides durable protection with enhanced flexibility and sensitivity,as compared to the use of a bare *** of an evaluation of its performance have shown that the FBG sensors embedded in this way can be applied effectively in the measurement of strain,with an average wavelength responsivity of 0.0135 nm/cm of displacement for tensile strain and -0.0142 nm/cm for compressive strain,both showing a linearity value of up to 99%.Furthermore,such an embedded FBG-based strain sensor has a sensitivity of~1.74 times greater than that of a bare FBG used for strain measurement and is well protected and suitable for in-the-field *** is also observed that the thermoplastic polyurethane based(TPU-based)FBG strain sensor carries a sensitivity value of~2.05 times higher than that of the polylactic acid based(PLA-based)FBG strain sensor proving that TPU material can be made as the material of choice as a“sensing”pad for the FBG.

关键词： Fiber-optic sensors fiber Bragg grating 3D printing technology multiple-point strain measurement

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Epithelial Layer Estimation Using Curvatures and Textural Features for Dysplastic Tissue Detection

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Computers, Materials & Continua 2021年第4期67卷 761-777页

作者： Afzan Adam abdul Hadi Abd rahman nor Samsiah Sani Zaid Abdi Alkareem Alyessari Nur Jumaadzan Zaleha Mamat Basela Hasan Faculty of Information Science and Technology Center for Artificial Intelligence TechnologyUniversiti Kebangsaan MalaysiaBangiSelangor43300Malaysia Faculty of Science and Technology School of Mathematical SciencesUniversiti Kebangsaan MalaysiaBangiSelangor43300Malaysia Department of Information Technology and Computing Faculty of Computer StudiesArab Open UniversityAmmanJordan

Boundary effect in digital pathology is a phenomenon where the tissue shapes of biopsy samples get distorted during the sampling *** morphological pattern of an epithelial layer is greatly ***,the shape deformation model can normalise the distortions,but it needs a 2D *** theory,on the other hand,is not yet tested on digital pathology ***,this work proposed a curvature detection to reduce the boundary effects and estimates the epithelial *** boundary effect on the tissue surfaces is normalised using the frequency of a curve deviates from being a straight *** epithelial layer’s depth is estimated from the tissue edges and the connected nucleolus ***,the textural and spatial features along the estimated layer are used for dysplastic tissue *** proposed method achieved better performance compared to the whole tissue regions in terms of detecting dysplastic *** result shows a leap of kappa points from fair to a substantial agreement with the expert’s ground truth *** improved results demonstrate that curvatures have been effective in reducing the boundary effects on the epithelial layer of ***,quantifying and classifying the morphological patterns for dysplasia can be *** textural and spatial features on the detected epithelial layer can capture the changes in tissue.

关键词： Digital pathology grading dysplasia tissue boundary effect

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Self-management of osteoarthritis while waiting for total knee arthroplasty during the COVID-19 pandemic among older Malaysians

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World Journal of Clinical Cases 2023年第29期11卷 7043-7052页

作者： Ahmad Nabil Khairi Mahdzir Sumaiyah Mat Shi Rui Seow Rizal abdul Rani Muhammad Kamil Che Hasan nor Hamdan Mohamad Yahaya Physiotherapy Programme Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 50300Kuala LumpurMalaysia Center for Healthy Ageing and Wellness Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 50300Kuala LumpurMalaysia Department of Orthopedic&Traumatology Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala Lumpur 56000Kuala LumpurMalaysia Department of Medical Surgical Nursing Kulliyyah of NursingInternational Islamic University MalaysiaKuantan 25200PahangMalaysia

BACKGROUND The study sought to understand the self-management strategies used by patients during the postponement of their total knee arthroplasty(TKA)procedure,as well as the associations between the length of waiting time,pain,and physical frailty and *** study focused on individuals aged 50 years and above,as they are known to be more vulnerable to the negative impacts of delayed elective surgery and *** study hypothesizes that delayed TKR due to coronavirus disease 2019(COVID-19)will bear negative effect in self-management,pain,and physical frailty and function in older *** To investigate the effects of COVID-19 pandemic on self-management,pain,and physical function in older adults awaiting TKA in *** This cross-sectional study has the data of participants,who matched the criteria and scheduled for TKA for the first time,extracted from the TKA registry in the Department of Orthopaedics and Traumatology,Hospital Canselor Tuanku *** on pain status,and self-management,physical frailty,and instrumental activities daily living were also *** linear regression analysis with a significant level of 0.05 was used to identify the association between waiting time and pain on physical frailty and functional *** Out of 180 had deferred TKA,50%of them aged 50 years old and above,80%were women with ethnic distribution Malay(66%),Chinese(22%),Indian(10%),and others(2%)***-two percent of the participants took medication to manage their pain during the waiting time,while 10%used herbs and traditional supplements,and 68%did exercises as part of their osteoarthritis(OA)***-six participants were found to have physical frailty(strength,assistance with walking,rising from a chair,climbing stairs,and falls questionnaire score>4)which accounted for 72%.Increased pain was associated with physical frailty with odds ratio,odds ratio(95%confidence interval):1.46(1.04-2.05).

关键词： Osteoarthritis Total knee arthroplasty Aged COVID-19 Pain Functional performance

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Establishing a child and adolescent mental health center in Herat,Afghanistan:a project description

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Global Health Journal 2023年第4期7卷 194-199页

作者： abdul Fattah Najm Aziz-ur-rahman Niazi Mina Alekozay Emily B.Allan Kaaren Mathias Technical Director International Assistance MissionHerat 3001Afghanistan Department of Public Health and Infectious Diseases Faculty of MedicineHerat 3001Afghanistan Independent Consultant RedcarNorth YorkshireTS103JAUK Faculty of Health University of CanterburyChristchurch 8140New Zealand

Objective:Afghanistan has witnessed a long-lasting 4-decade armed conflict,which together with high levels of poverty and interpersonal violence,resulted in high incidence and prevalence of mental disorders in general population,including children and *** mid-2018,there was neither mental health care facility nor a child psychiatrist in ***,we report the establishment of the first children and adolescents'mental health center(CAMHC)in Herat province of ***:In July 2018,CAMHC was initiated at Mental Health Training *** was initially planned by the International Assistance Mission(IAM)and Herat Public Health Directorate;and financially supported by the Tearfund UK,the United Methodist Committee on Relief and Tearfund *** target population of CAMHC was children and adolescents in Herat and neighboring provinces,healthcare professionals,staff of government and non-governmental organizations,school teachers and community ***:A group of eight mental health professionals were trained and made the interdisciplinary board for diagnosis and management of mental disorders in children and *** the initial three-year period,2448 patients,including 1264(51.6%)boys and 1184(48.4%)girls,presented with mental disorders to *** and management of mental disorders were performed according to standard international *** awareness-raising seminars were held;2000 leaflets,10000 posters,and 30000 brochures were prepared and distributed;and two short video clips were produced and broadcast via IAM website,social media and local TV channels.A database was developed to house for project data,assessment of outcomes and reporting to ***:Establishment of CAMHC resulted in significant achievements in diagnosis and management of mental disorders among children and adolescents,healthcare staff capacity building,and awareness-raising about mental *** o

关键词： Child and adolescent Mental health Herat Afghanistan

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