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Computational Investigation of Multiband EMNZ Metamaterial Absorber for Terahertz Applications

Computers, Materials & Continua 2022年第5期71卷 3905-3920页

作者： Ismail Hossain Md Samsuzzaman Mohd Hafiz Baharuddin Norsuzlin Binti Mohd Sahar mandeep singh jit singh Mohammad Tariqul Islam Space Science Center Universiti Kebangsaan Malaysia43600UKM BangiSelangorMalaysia Department of Computer and Communication Engineering Faculty of Computer Science and EngineeringPatuakhali Science and Technology UniversityBangladesh Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaMalaysia

This study presents an Epsilon Mu near-zero(EMNZ)nanostructured metamaterial absorber(NMMA)for visible regime *** resonator and dielectric layers are made of tungsten(W)and quartz(fused),where the working band is expanded by changing the resonator layer’s *** to perfect impedance matching with plasmonic resonance characteristics,the proposed NMMA structure is achieved an excellent absorption of 99.99%at 571 THz,99.50%at 488.26 THz,and 99.32%at 598 THz *** absorption mechanism is demonstrated by the theory of impedance,electric field,and power loss density distributions,*** geometric parameters are explored and analyzed to show the structure’s performance,and a near-field pattern is used to explain the absorption mechanism at the resonance frequency *** numerical analysis method describes that the proposed structure exhibited more than 80%absorbability between 550 and 900 *** Computer Simulation Technology(CST Microwave Studio 2019)software is used to design the proposed ***,CSTHFSS interference is validated by the simulation data with the help of the finite element method(FEM).The proposed NMMA structure is also exhibits glucose concentration sensing capability as *** the proposed broadband absorber may have a potential application in THz sensing,imaging(MRI,thermal,color),solar energy harvesting,light modulators,and optoelectronic devices.

关键词： Metamaterial absorber terahertz applications multiband EM near zero nanostructured visible regime applications

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Inkjet Printed Metamaterial Loaded Antenna for WLAN/WiMAX Applications

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Computers, Materials & Continua 2022年第5期71卷 2271-2284页

作者： Farhad Bin Ashraf Touhidul Alam Md Tarikul Islam mandeep jit singh Norbahiah Binti Misran Mohammad Tariqul Islam Department of Electrical Engineering Polytechnique MontréalMontréalQC H3T 1J4Canada Space Science Centre(ANGKASA) Institute of Climate Change(IPI)Universiti Kebangsaan MalaysiaBangi43600SelangorMalaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaMalaysia

In this paper,the design and performance analysis of an Inkjetprinted metamaterial loaded monopole antenna is presented for wireless local area network(WLAN)and worldwide interoperability for microwave access(WiMAX)*** proposed metamaterial structure consists of two layers,one is rectangular tuning fork-shaped antenna,and another layer is an inkjet-printed metamaterial *** metamaterial layer is designed using four split-ring resonators(SRR)with an H-shaped inner structure to achieve negative-index metamaterial *** metamaterial structure is fabricated on low-cost photo paper substrate material using a conductive inkbased inkjet printing technique,which achieved dual negative refractive index bands of 2.25–4.25 GHz and 4.3–4.6 *** antenna is designed using a rectangular tuning fork structure to operate at WLAN and WiMAX *** antenna is printed on 30×39×1.27 mm3 Rogers RO3010 substrate,which shows wide impedance bandwidth of 0.75 GHz(2.2 to 2.95 GHz)with 2 dB realized gain at 2.4 *** integrating metamaterial structure,the impedance bandwidth becomes 1.25 GHz(2.33 to 3.58 GHz)with 2.6 dB realized gain at 2.4 *** antenna bandwidth and gain have been increased using developed quad SRR based metasurface by 500 MHz and 0.6 dBi ***,the proposed quad SRR loaded antenna can be used for 2.4 GHz WLAN bands and 2.5 GHz WiMAX *** contribution of this work is to develop a cost-effective inject printed metamaterial to enhance the impedance bandwidth and realized the gain of a WLAN/WiMAX antenna.

关键词： Metamaterial epsilon negative antenna split ring resonator WiMAX WLAN

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RSS-Based Indoor Localization System with Single Base Station

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Computers, Materials & Continua 2022年第3期70卷 5437-5452页

作者： Samir Salem Al-Bawri Mohammad Tariqul Islam mandeep jit singh Mohd Faizal Jamlos Adam Narbudowicz Max J.Ammann Dominique M.M.P.Schreurs Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaUKMBangi43600SelangorMalaysia Faculty of Mechanical Engineering Universiti Malaysia PahangPekan26600PahangMalaysia Antenna and High Frequency Research Centre School of Electrical&Electronic EngineeringDublin Institute of TechnologyDublin 8Ireland Department of Electrical Engineering Division ESAT-TELEMICKU LeuvenBelgium

The paper proposes an Indoor Localization System(ILS)which uses only one fixed Base Station(BS)with simple non-reconfigurable *** proposed algorithm measures Received Signal Strength(RSS)and maps it to the location in the room by estimating signal strength of a direct line of sight(LOS)signal and signal of the first order reflection from the *** algorithm is evaluated through both simulations and empirical measurements in a furnished open space office,sampling 21 different locations in the *** is demonstrated the system can identify user’s real-time location with a maximum estimation error below 0.7 m for 80%confidence Cumulative Distribution Function(CDF)user level,demonstrating the ability to accurately estimate the receiver’s location within the *** system is intended as a cost-efficient indoor localization technique,offering simplicity and easy integration with existing wireless communication *** comparable single base station localization techniques,the proposed system does not require beam scanning,offering stable communication capacity while performing the localization process.

关键词： Indoor localization localization techniques received signal strength

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Rayleigh wave propagation with two temperature and diffusion in context of three phase lag thermoelasticity

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Journal of Ocean Engineering and Science 2024年第4期9卷 317-325页

作者： mandeep singh Sangeeta Kumari Department of Mathematics Chandigarh UniversityGharuan(Mohali)PunjabIndia

The primary objective of this research problem is to analyze the Rayleigh wave propagation in homogeneous isotropic half space with mass diffusion in Three Phase Lag(TPL)thermoelasticity at two *** governing equations of thermodiffusive elastic half space have been solved using the normal mode analysis in order to obtain the Rayleigh wave frequency equation at relevant boundary *** variation of various parameters like non-dimensional speed,attenuation coefficient,penetration depth and specific loss corresponding to thermodiffusion parameter,relaxation time,wave number and frequency has been *** effect of these parameters on Rayleigh wave propagation in thermoelastic half space are graphically demonstrated and variations of all these parameters have been compared within Lord-Shulman(L-S),Green-Nagdhi(GN-III)and Three Phase Lag(TPL)theory of thermoelasticity.

关键词： Rayleigh waves Attenuation coefficient Normal mode analysis Thermoelasticity Diffusion Three phase lag

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Energy-growth nexus for‘Renewable Energy Country Attractiveness Index’countries:Evidence from new econometric methods

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Geoscience Frontiers 2024年第3期15卷 298-311页

作者： mandeep Mahendru Aviral Kumar Tiwari Gagan Deep Sharma Solomon Nathaniel Mansi Gupta Szechenyi Istvan University GyorHungary Indian Institute of Management BodhgayaIndia University School of Management Studies Guru Gobind Singh Indraprastha UniversitySector 16 CDwarkaNew DelhiIndia Department of Economics University of LagosAkokaNigeria Centre for Financial Innovation S P Jain Institute of Management and ResearchMumbaiIndia

This study explores the connections between renewable energy consumption(REC),non-renewable energy consumption(NREC),gross fixed capital formation(GFCF),the labor force(LF),and economic growth(GDP)in Renewable Energy Country Attractiveness Index(RECAI)countries for *** quantify the nexus between REC,NREC,and GDP while utilizing a production model framework and including the measures of labor and capital,for suggesting a phase-wise strategy to attain the sustainable development *** use robust methodologies including Lagrange Multiplier(LM)panel unit root tests with trend shifts,Westerlund cointegration test,LM bootstrap technique for cointegration with breaks,continuously updated fully modified(CUP-FM)and continuously updated bias-corrected(CUPBC)estimators,Augmented Mean Group(AMG)approach,fully modified ordinary least squares,dynamic ordinary least squares,Canonical Cointegrating Regression(CCR),and panel causality test proposed by Canning&*** compute non-parametric time-varying coefficients with fixed effects for seeing the impact of GFCF,LF,REC,and NREC on *** results press upon policymakers to shift toward clean energy and REC for attaining the environmental goals(SDGs 6,7,13,and 15)and the economic goals(SDGs 1,2,8,and 10).While this shift would help developed economies,which have already attained the economic goals,to progress on the front of environmental goals,it would enable developing countries to progress on both fronts in a balanced manner.

关键词： Renewable energy consumption Economic growth Non-renewable energy consumption CUP-BC CUP-FM Time-varying coefficients with fixed effects

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Experimental investigation into the effects of Argemone biodiesel/diesel blends on cyclic variations in a multi-cylinder CRDI engine

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Clean Energy 2023年第2期7卷 363-374页

作者： Abhinav Sharma Prem Kumar Sarbjot singh Sandhu mandeep singh Department of Mechanical Engineering Dr B R Ambedkar National Institute of TechnologyJalandhar-144011PunjabIndia

Internal combustion engines suffer from high cyclic variations that result in higher emissions,lower efficiency,higher fuel consump-tion and poor *** purpose of this study is to investigate how Argemone mexicana biodiesel(AGB)/diesel blended fuels affect the cyclic variability of combustion parameters such as maximum cylinder pressure(Pmax)and indicated mean effective pressure(IMEP)in a four-cylinder turbocharged intercooled common-rail direct injection engine under various engine loading *** chemical and physical properties of AGB produced from *** oil were measured and compared according to the ASTM D6751 *** various volumetric ratios,AGB and diesel fuel were blended as D100,AB10(10%AGB+90%D100),AB20(20%AGB+80%D100)and AB30(30%AGB+70%D100).The IMEP and Pmax time-series data were collected over 200 consecutive cycles at low,partial and high engine loads at a constant engine speed of 2000 *** coefficients of variation(COV)of combustion parameters(Pmax and IMEP)were measured for different AGB/diesel blends and found to be within acceptable *** results show that COV_(Pmax) and COV_(IMEP) decrease as the engine load *** was observed that at low load,AB10 has the lowest COV(Pmax,IMEP),and at partial and high load,AB20 has the lowest COV(Pmax,IMEP)among all the blends.

关键词： indicated mean effective pressure cyclic variations biodiesel diesel engine Argemone mexicana biodiesel

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The mechanism and effects of subgrade fluidisation under ballasted railway tracks

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Railway Engineering Science 2020年第2期28卷 113-128页

作者： Buddhima Indraratna mandeep singh Thanh Trung Nguyen Centre for Geomechanics and Railway Engineering University of WollongongWollongong CityNSW 2522Australia Australian Research Council(ARC)Industrial Transformation Training Centre ITTC-RailUniversity of WollongongWollongong CityNSW 2522Australia

The rapid growth in railway infrastructure and the construction of high-speed heavy-haul rail network,especially on ground that is basically unsuitable,poses challenges for geotechnical engineers because a large part of the money invested in the development of railway lines is often spent on track *** fact around the world,the mud pumping of subgrade fines is one of the common reasons why track performance deteriorates and track stability is *** article presents a series of laboratory tests to examine following aspects of mud pumping:(1)the mechanisms of subgrade fluidisation under undrained condition,(2)the effects of mud pumping on the engineering characteristics of ballast,and(3)the use of vertical drains to stabilize subgrade under cyclic *** undrained cyclic triaxial testing on vulnerable soft subgrade was performed by varying the cyclic stress ratio(CSR)from 0.2 to 1.0 and the loading frequency f from 1.0 to 5.0 *** is seen from the test results that for a specimen compacted at an initial dry density of 1790 kg/m3,the top portion of the specimen fluidises at CSR=0.5,irrespective of the applied loading *** cyclic railway loading,the internal redistribution of water at the top of the subgrade layer softens the soil and also reduces its *** response to these problems,this paper explains how the inclusion of vertical drains in soft subgrade will help to prevent mud pumping by alleviating the build-up of excess pore pressures under moving train loads.

关键词： Mud pumping Ballasted track Subgrade fluidisation Fouled ballast Prefabricated vertical drains

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The modified magnetodielectric response in KNN-CZFMO based particulate multiferroic composite system

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Journal of Advanced Dielectrics 2020年第5期10卷 58-68页

作者： Kulwinder Kaur mandeep singh Jaspal singh Sanjeev Kumar Department of Physics Punjabi UniversityPatiala 147002India Applied Sciences Department Punjab Engineering College(Deemed to be University)Chandigarh 160012India

Lead-free multiferroic composites of 1−x(K_(0.5)Na_(0.5)NbO_(3−x))(Co_(0.6)Zn_(0.4))(Fe_(1.7)Mn_(0.3))O_(4)(KNN-CZFMO),where x=0.0,0.1,0.2,0.3,0.4,0.5 and 1.0,have been investigated for their structural,morphological,electrical,magnetic,dielectric and magneto-dielectric *** of KNN and CZFMO crystal structure in each composite has been confirmed from X-ray diffrac-tion analysis(XRD).Cuboidal-shaped grains of KNN and spherical-shaped grains of CZFMO have been observed by scanning electron microscopy(SEM).The room temperature ferroelectric behavior as confirmed by polarization versus electric field(P-E)hysteresis loops has been found to be decreasing with increasing CZFMO *** magnetic ordering with the increase in CZFMO concentration in the prepared composites has been observed by magnetization versus magnetic field(M-H)hysteresis *** electrical conductivity of composites has been studied using Jonscher’s universal power *** room temperature dielectric constant(ε′)and dielectric loss(tanδ)have been observed to decrease with the increase in the frequency of the applied external electric *** dielectric relaxation behavior has been observed using curve fitting analysis via the Havriliak-Negami relaxation *** value of the magnetodielectric(MD)effect~−11%at a frequency of 1 kHz with the applied magnetic field of 1 T has been achieved for 0.9 KNN−0.1 CZFMO(x=0.1)composite in the present research work.

关键词： Multiferroics composites magnetodielectric effect

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Continuous B scan ultrasound guided post-traumatic sub-periosteal orbital hematoma drainage: An advantage over routine needle drainage procedure

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World Journal of Emergency Medicine 2019年第4期10卷 248-250页

作者： Amar Pujari Pallavi singh Ayushi Sinha Shreya Nayak mandeep S.Bajaj Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences

Dear editor,Traumatic orbital haemorrhage is an unfortunate complication with potential vision-threatening consequences.[1-3]The collection of blood can occur anywhere along the potential free orbital spaces,[4]but the subperiosteal collection of the blood is an important clinical variant where careful and timely intervention can give commendable rewards to the surgeon as well as to the patient.[1,2]Subperiosteal hematoma could be traumatic or non-traumatic,in turns,the non-traumatic cases may be due to bleeding tendency as in cases of leukaemia.

关键词： Traumatic orbital haemorrhage unfortunate complication consequences

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Expression of multidrug resistance proteins in retinoblastoma

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International Journal of Ophthalmology(English edition) 2017年第11期10卷 1655-1661页

作者： Swati Shukla Arpna Srivastava Sunil Kumar Usha singh Sandeep Goswami Bhavna Chawla mandeep singh Bajaj Seema Kashyap Jasbir Kaur Department of Ocular Biochemistry Dr. Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences New Delhi 110029 India Oculoplasty & Pediatric Opthalmology Services Dr. Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences New Delhi 110029 India Department of Ocular Pathology Dr. Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical Sciences New Delhi 110029 India

AIM： To elucidate the mechanism of multidrug resistance in retinoblastoma, and to acquire more insights into in vivo drug ***： Three anticancer drug resistant Y79 human RB cells were generated against vincristine, etoposide or carboplatin, which are used for conventional chemotherapy in RB. Primary cultures from enucleated eyes after chemotherapy（PCNC） were also prepared. Their chemosensitivity to chemotherapeutic agents（vincristine, etoposide and carboplatin） were measured using MTT assay. Western blot analysis was performed to evaluate the expression of p53, Bcl-2 and various multidrug resistant proteins in retinoblastoma ***： Following exposure to chemotherapeutic drugs, PCNC showed less sensitivity to drugs. No significant changes observed in the p53 expression, whereas Bcl-2 expression was found to be increased in the drug resistant cells as well as in PCNC. Increased expression of P-glycoprotein（P-gp） was observed in drug resistant Y79 cells; however there was no significant change in the expression of P-gp found between primary cultures of primarily enucleated eyes and PCNC. Multidrug resistance protein 1（Mrp-1） expression was found to be elevated in the drug resistant Y79 cells as well as in PCNC. No significant change in the expression of lung resistance associatedprotein（Lrp） was observed in the drug resistant Y79 cells as well as in ***： Our results suggest that multidrug resistant proteins are intrinsically present in retinoblastoma which causes treatment failure in managing retinoblastoma with chemotherapy.

关键词： retinoblastoma chemotherapy multidrug resistance multidrug resistance associated proteins

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