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Frontiers of Architectural Research 2024年第1期13卷 127-143页

作者： Mohd Hasfarisham Abd Halim Naizatul Akma Mohd Mokhtar Nor Khairunnisa Talib Shyeh Sahibul Karamah Masnan ahmad Fadly jusoh Mokhtar Saidin Kedah Malaysia Universiti Utara Malaysia KedahMalaysia Universiti Sains Malaysia PenangMalaysia

Archaeological research at the Sungai Batu Archaeological Complex(SBAC),which has been carried out until 2023,aims to complete the chronological data and urbanization process of the ancient *** study will especially prove that the ongoing urbanization process is aimed at developing the iron smelting industry and trade in ancient Kedah,especially in *** is because archaeological research at SBAC has proven that with the existence of the ancient Kedah iron smelting workshop at SBAC,river jetties,port management,rituals,and Buddhist monuments began to be erected,all of which can be determined by chronometric *** results of the chronometric dating have proven that the ancient Kedah Kingdom existed since the 6th century BC and was oriented towards the trade of iron resources,which allowed the use of the area to grow *** process of urbanization and land use clearly conforms to Lynch’s principle,which emphasizes the principles of 1)paths,2)edges,3)districts,4)nodes,and 5)landmarks in the development process of land use and urbanization in the complex.

关键词： Chronometric dating Urbanization Land use Monument Iron smelting site

Chicken Eggshell as an Innovative Bioflocculant in Harvesting Biofloc for Aquaculture Wastewater Treatment

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Journal of Renewable Materials 2023年第5期11卷 2321-2332页

作者： Hajjar Hartini Wan jusoh Nor Azman Kasan Hidayah Manan Nurfarahana Mohd Nasir Fareza Hanis Mohd Yunos Sofiah Hamzah ahmad jusoh Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia TerengganuKuala NerusTerengganu21030Malaysia Institute of Tropical Aquaculture and Fisheries(AKUATROP) Universiti Malaysia TerengganuKuala NerusTerengganu21030Malaysia Faculty of Engineering Universiti Putra MalaysiaUPM SerdangSelangor Darul Ehsan43400Malaysia

Implementation of biofloc technology(BFT)system in aquaculture industry shows high productivity,low feed conversion ratio,and an optimum culture *** study was divided into two *** first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture *** second phase examined the performance of harvesting biofloc(remaining phytoplankton and suspended solids in the system)using chicken eggshell powder(CESP).This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia(>99%)with a remaining ammonia concentration of 0.016 mg L^(−1)and 0.018 mg L^(−1),*** second phase of this study was performed to determine the optimal formulation and conditions of using CESP as a bio-flocculant in harvesting excess *** use of eggshell showed a higher harvesting efficiency of more than 80%under the following treatment conditions:0.25 g L^(−1)of eggshell dosage;with rapid and slow mixing rates of 150 and 30 rpm,respectively;30 min of settling time;settling velocity of 0.39 mm s^(−1)and pH of 6 to ***,the results indicated that biofloc would be the best green technology approach for sustainable aquaculture wastewater and the CESP is an organic matrix that environmental-friendly bio-coagulant for biofloc harvesting.

关键词： Chicken eggshell aquaculture biofloc coagulant water quality harvesting

Ti_(3)AlC_(2) coated D-shaped fiber saturable absorber for Q-switched pulse generation

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Optoelectronics Letters 2022年第8期18卷 468-471页

作者： Suziana Omar Salam MAzooz ahmad Haziq Aiman Rosol Zulzilawati jusoh Baktiar Musa Sulaiman Wadi Harun School of Electrical Engineering College of EngineeringUniversiti Teknologi MARADungun 23000Malaysia Department of Communication Engineering Engineering Technical CollegeAl-Furat Al-Awsat Technical UniversityNajafIraq Department of Electrical Engineering University of MalayaKuala Lumpur 50603Malaysia Department of Engineering Faculty of Advanced Technology and MultidisciplineAirlangga UniversitySurabayaIndonesia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this letter,a titanium aluminum carbide(Ti_(3)AlC_(2))coated D-shaped fiber is proposed and demonstrated as a new saturable absorber(SA)for Q-switched laser pulse *** preparing the SA,the TiAlCpowder is dispersed in liquid polyvinyl alcohol(PVA)before the solution is dropped and left to dry onto a polished surface of D-shape *** SA is added to an erbium-doped fiber laser(EDFL)cavity to modulate the cavity loss for *** Q-switched laser is obtained at 1561 *** pulse width of the pulses can be varied between 7.4μs and 5.1μs with a corresponding repetition rate range from 41.26 k Hz to 54.35 k Hz,when the pump power is increased from 42.2 m W to 71.5 m *** 71.5 m W pump,the pulse energy is obtained at 70.3 n *** signal-to-noise ratio(SNR)of the fundamental frequency is recorded at 67 d B,which indicates the stability of the laser.

关键词： switched fiber pulse

Wearable UWB Antenna-Based Bending and Wet Performances for Breast Cancer Detection

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Computers, Materials & Continua 2022年第12期73卷 5575-5587页

作者： Ali Hanafiah Rambe Muzammil jusoh Samir Salem Al-Bawri Mahmoud A.Abdelghany Department of Electrical Engineering Universitas Sumatera UtaraMedan20155Indonesia Advanced Communication Engineering(ACE) Centre of ExcellenceFaculty of Electronic Engineering TechnologyUniversiti Malaysia PerlisMalaysia Department of General Educational Development Faculty of Science and Information Technology(FSIT)Daffodil International UniversityDhaka1341Bangladesh Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangiMalaysia Department of Electronics and Communication Engineering Faculty of EngineeringHadhramout UniversityAl-MukallaYemen Electrical Engineering Department College of EngineeringPrince Sattam Bin Abdulaziz UniversityWadi Addwasir11991Saudi Arabia Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61519Egypt

This paper proposed integrating the communication system on the garment,which can be utilized to detect breast cancer at an early stage by using an ultra-wideband(UWB)wearable *** cancer is an abnormal cell that is located in the breast *** detection of breast cancer plays an important role,and it helps in the long term for all *** proposed UWB wearable antenna successfully operates at 3.1-10.6 GHz under an acceptable reflection coefficient of−10 *** fabricated wearable antenna was made from Shieldit Super and felt both conductive and nonconductive wearable *** measurement studies of bending angles have been carried out that covered 2°,4°,6°,8°,and 10°.In addition,the performance of UWB antennas in wet environments is studied in four stages:in water,instantly wet,nearly dry,and entirely *** is good agreement between the measured and simulated *** on the experimental results,the proposed antenna could be helpful for a home breast cancer detection system.

关键词： Wearable antenna UWB antenna bioelectromagnetic antenna propagation

Left-Handed Characteristics Tunable C-Shaped Varactor Loaded Textile Metamaterial for Microwave Applications

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Computers, Materials & Continua 2022年第4期71卷 611-628页

作者： Samir Salem Al-Bawri Mohammad Tariqul Islam Kabir Hossain Thennarasan Sabapathy Muzammil jusoh Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaUKMBangi43600SelangorMalaysia Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)PerlisMalaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)PerlisMalaysia

This paper presents a textile-based C-shaped split-ring resonators(SRR)metamaterial(MTM)unit cells with an electrical tunability *** proposed MTM was composed of two symmetrical C-shaped SRR combined with a central diagonal metal bar,whereas the RF varactor diode is placed on the backside of the splitted ground *** behavior of single and array MTM unit cells were analyzed while the achieved negative index physical characteristics were widely *** four different MTM arrays(i.e.,1×1,1×2,2×1,and 2×2)were analyzed in simulation,a 2×2-unit cell array was chosen to fabricate,and it was further undergone experimental *** proposed tunable MTM exhibits double negative(DNG)/left-handed properties with an average bandwidth of more than 2.8 ***,attainable negative permittivity and negative permeability are within 2.66 to 9.59 GHz and within 2.77 to 15 GHz,respectively,at the frequency of interest(between 1 and 15 GHz).Moreover,the proposed tunable MTM also showed tunable transmission coefficient *** proposed electrically tunable textile MTM might function in a dynamic mode,making it suitable for a variety of microwave-wearable applications.A satisfactory agreement between simulations and experiments were achieved,demonstrating that the proposed MTM can operate over a wide bandwidth.

关键词： Textile metamaterial metamaterial wearable antennas tunable metamaterials metasurface antennas DNG metamaterials

Nanosecond Pulse Generation Using the Stimulated Brillouin Scattering Effect in a Photonic Crystal Fiber

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Chinese Physics Letters 2013年第11期30卷 99-101页

作者： Z.jusoh N.S.Shahabuddin N.M.Ali H.ahmad S.W.Harun Department of Electrical Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Photonic Research Centre University of Malaya50603 Kuala LumpurMalaysia Faculty of Electrical Engineering Universiti Teknologi MARA(UiTM)40450 Shah AlamMalaysia

A nanosecond pulsed laser is demonstrated using the stimulated Brillouin scattering(SBS)effect in a nonlinear photonic crystal fiber(PCF).The Brillouin fiber laser(BFL)uses a 50-m-long PCF in a simple ring cavity to generate a self-starting pulse as the Brillouin power reaches 16.5 dBm based on the relaxation oscillation *** BFL generates a pulse train with repetition rates of 2.7 MHz and 5.4 MHz depending on the BP *** pulse width of the laser is obtained to be 190 ns at the BP power of 16.5 dBm and is maintained at around 72 ns as the pump power is set within 17.7 dBm and 18.5 *** maximum pulse energy of 20 nJ is obtained at BP power of 17.4 *** SBS based pulse laser is fairly stable at room temperature.

关键词： fiber pump scattering

Modelling of heat transfer for progressive freeze concentration process by spiral finned crystallizer

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Chinese Journal of Chemical Engineering 2018年第5期26卷 970-975页

作者： Shafirah Samsuri Nurul Aini Amran Mazura jusoh Department of Chemical Engineering Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia Department of Chemical Engineering Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

This study presents a novel design for a spiral finned crystallizer which is the primary element of progressive freeze concentration(PFC) system, which simplifies the setup of the conventional system. After the crystallizer has been designed, the research experiments have been conducted and evaluated through a thorough analysis of its performance by developing a mathematical model that can be used to predict the productivity of ice crystal at a range of coolant temperature. The model is developed based on the basic heat transfer equation, and by considering the solution's and the coolant's convective heat transfer coefficient(h) under the forced flow *** model's accuracy is verified by making comparison between the ice crystal mass' experimental value and the values predicted by the model. Consequently, the study found that the model helps in enhancing the PFC system.

关键词：热转移螺线冻结数学模型建模转移系数流动条件冷却剂

Decagonal C-Shaped CSRR Textile-Based Metamaterial for Microwave Applications

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Computers, Materials & Continua 2022年第4期71卷 1677-1693页

作者： Kabir Hossain Thennarasan Sabapathy Muzammil jusoh Ping Jack Soh Samir Salem Al-Bawri Mohamed Nasrun Osman Hasliza A.Rahim Danai Torrungrueng Prayoot Akkaraekthalin Advanced Communication Engineering(ACE)Centre of Excellence Universiti Malaysia Perlis(UniMAP)Jalan TigaPengkalan Jaya Business CentreKangar01000Malaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia Centre for Wireless Communications(CWC) University of Oulu90014Finland Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Teacher Training in Electrical Engineering Faculty of Technical EducationKing Mongkut’s University of Technology North Bangkok(KMUTNB)WongsawangBangsue10800Thailand Department of Electrical and Computer Engineering Faculty of EngineeringKing Mongkut’s University of Technology North Bangkok(KMUTNB)WongsawangBangsue10800Thailand

This paper introduces a decagonal C-shaped complementary splitring resonator(CSRR)textile-based metamaterial(MTM).The overall size of the proposed sub-wavelength MTM unit cell is 0.28λ0×0.255λ0 at 3 *** stopband behaviour was first studied prior analysing the negative index properties of the proposed *** is worth noting that in this work a unique way the experiments were *** both simulations and measurements,the proposed MTM exhibited negative-permittivity and negative-refractive index characteristics with an average bandwidth of more than 3 GHz(considering 1.7 to 8.2 GHz as the measurements were carried out within this range).In simulations,the MTM exhibited negative-permittivity properties within the range of 1.7 to 7.52 GHz and 7.96 to 8.2 GHz;and negative-refractive index from 1.7 to 2.23 GHz and 2.33 to 5.09 GHz and 5.63 to 7.45 *** measured from 1.7 to 8.2 GHz,negative-permittivity and negative-refractive index characteristics are exhibited throughout an average bandwidth of more than 3 ***,the transmission coefficient attained in simulations and measurements indicated about 3 GHz of bandwidth,from 1.7 to 3.88 GHz and from 6.68 to 7.4 *** satisfactory agreement between simulations and experiments indicates the potential of the proposed MTM for microwave applications.

关键词： Metamaterial textile metamaterial bioelectromagnetics metasurface antennas

Nanosecond Pulse Generation with Silver Nanoparticle Saturable Absorber

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Chinese Physics Letters 2019年第5期36卷 31-34页

作者： R.Z.R.R.Rosdin M.T.ahmad A.R.Muhammad Z.jusoh H.Arof S.W.Harun Photonics Engineering Laboratory Department of Electrical Engineering University of Malaya Faculty of Electrical Engineering Universiti Teknologi Mara (Terengganu) Department of Physics Faculty of Science and Technology Airlangga University

Nanosecond pulse generation in an erbium-doped fiber laser (EDFL) passively mode-locked by a silver nanoparticle(SNP)-based saturable absorber(SA) is experimentally demonstrated. The SA is fabricated by depositing a nanosized SNP layer onto the surface of polyvinyl alcohol film through the thermal evaporation process. By inserting the SA into an EDFL cavity, stable mode-locked operation is achieved at 1561.5 nm with the maximum pulse energy up to 52.3 nJ. The laser operates at a pulse repetition frequency of 1.0 MHz with a pulse width of 202 ns. These results suggest that SNPs could be developed as an effective SA for mode-locking pulse generation.

关键词： SA Nanosecond Pulse Generation with Silver Nanoparticle Saturable Absorber

High-Bandwidth,Low-Power CMOS Transistor Based CAB for Field Programmable Analog Array

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Computers, Materials & Continua 2023年第3期74卷 5885-5900页

作者： Ameen Bin Obadi Alaa El-Din Hussein Samir Salem Al-Bawri Kabir Hossain Abdullah Abdulhameed Muzammil jusoh Thennarasan Sabapathy Ahmed Jamal Abdullah Al-Gburi Mahmoud A.Albreem Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Faculty of Electronic Engineering TechnologyKangar01000Malaysia Electrical Engineering King Fahd University of Petroleum and MineralsDhahranEastern31261Saudi Arabia Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electronics&Communication Engineering Faculty of Engineering&PetroleumHadhramout UniversityAl-MukallaHadhramout50512Yemen Faculty of Engineering Norwegian University of Science and Technology(NTNU)GjovikN-2815Norway Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia Department of General Educational Development Faculty of Science and Information Technology(FSIT)Daffodil International UniversityDhaka1207Bangladesh Department of Electronics and Computer Engineering(FKEKK) Center for Telecommunication Research and Innovation(CeTRI)Universiti Teknikal Malaysia Melaka(UTeM)Durian Tungal76100Malaysia Department of Electrical Engineering University of SharjahSharjah27272United Arab Emirates

This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are *** proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass *** functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface *** architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six ***,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional ***,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed *** of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS *** design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 *** demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this ***,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.

关键词： CMOS field programmable analog array configurable analog block current mode circuit