Browsing by Author "Hossain, Ismail"

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A Bendable Wide Oblique Incident Angle Stable Polarization Insensitive Metamaterials Absorber for Visible Optical Wavelength Applications
(Elsevier, 2023-09-01) Chowdhury, Md. Zikrul Bari; Islam, Mohammad Tariqul; Hossain, Ismail; Alsaif, Haitham; Alshammari, Ahmed S.; Alzamil, Ahmed; Samsuzzaman, Md.
In the visible frequency range, the most common application is for the transmission of electromagnetic signals over air and time to an aerial receiver. They are implemented to check tapped live powered components as well as identify defects, thermal leaking hot spots, or electrical failures. This study investigates the use of a compact nonage-shaped meta material absorber (MMA) for wide-band visible applications by employing a three-layer substrate material structure consisting of metal, dielectric, and metal. In comparison to the most current study, the presented MMA has a smaller size, which represents a noticeable novelty. Moreover, the proposed MMA has bendable properties and two numerical simulation software have been used to validate the proposed MMA. This demonstrates the successful acquisition of data from both the CST and HFSS simulations. The proposed metamaterial absorber attained above 80% absorption in the visible ranges from 400 nm to 750 nm wavelength for the simulation mode of TE and TM, respectively. An overall unit cell size of 930 × 930 × 202 nm3 which achieves an average absorption of 95.61% in its operating band 519–677 nm for visible optical wavelength when the performance of the proposed MMA was verified using the HFSS software. Moreover, the constant absorption feature is stable over a large range of oblique incidence angles. The quality of the MMA is verified by assessing the PCR value. Wide-angle incidence angle stability, polarization insensitivity, and absorption with 15⁰ bending effects can all be observed in both modes (TM and TE). In addition, the absorption property of MMA was investigated structurally by applying electric and magnetic fields. The presented MMA can be used in wide-angle stability, MRI, color imaging, solar cells, thermal imaging, and so on.
A blockchain-secured 6G smartgrid framework for resilient renewable energy integration and intelligent anomaly detection
(Nature Portfolio Journal Scientific Reports, 2026-05-18) Hossain, Ismail; Shufian, Abu; Munny, Morium Akter; Amin, Nowshad; Alsisi, Rayan Hamza
The integration of intermittent renewable energy into smart grids introduces critical vulnerabilities in security, transparency, and real-time resilience. This paper presents a novel blockchain-secured 6G Smart grid framework that synergistically integrates sixth generation (6G) ultra-reliable low-latency communication (URLLC), distributed ledger technology, and ensemble machine learning to establish a secure, scalable, and intelligent energy ecosystem. The proposed architecture leverages adaptive 6G network slicing to support differentiated services-including peer-to-peer energy trading, grid control, and cybersecurity monitoring-while ensuring sub-30 ms latency and robust connectivity. A permission blockchain layer provides decentralized trust, immutability, and automated transaction validation via formally verified smart contracts. An ensemble learning model combining XGBoost, Random Forest, and LightGBM enables real-time multi-dimensional anomaly detection across energy, network, and transaction layers. The framework is evaluated using a synthetically generated dataset of 5000 hourly records encompassing energy generation, consumption, 6G network performance, and blockchain transactions. Experimental results demonstrate a blockchain transaction success rate of 95.16% and sustained network latency below 30 ms across all slices, even under cyberattack conditions. Reported using class-based anomaly-detection metrics, the model achieves a Recall of 0.93 and F1-score of 0.97 for the anomaly class, and a Recall of 1.00 and F1-score of 0.99 for the normal class, with an overall accuracy of 0.98. The proposed system provides a foundational architecture for resilient, autonomous, and secure renewable energy management in next generation decentralized smart grids.
A Dual Band Y-Shape Monopole Antenna for 5G Wireless Application
(INOE Publishing House, 2023-06-09) Chowdhury, MD. Zikrul Bari; Armghan, Ammar; Islam, Mohammad Tariqul; Hossain, Ismail; Rahman, MD. Naimur; Moniruzzaman, MD.; Majumder, Sarna; Samsuzzaman, Md.
In this paper, a novel dual-band Y-shaped monopole patch antenna is proposed, designed, and fabricated for a 5G wireless application. The radiator patch of the antenna's wide and length was fabricated on an FR-4 substrate with the dimension of the proposed antenna of 27.88×23.67×1.58 mm3. The CST studio suite is utilized for all the virtual simulations and analyses regarding fabricated antennas. The study reveals that the fabricated antenna has a bandwidth of 6.20 GHz, covering 3.20-4.60 GHz and 5.10-9.90 GHz frequency ranges, respectively. The antenna has a nice S11 characteristic, excellent impedance matching, and an almost omnidirectional radiation pattern. The S11 is observed at -23.30 dB, and -26.60 dB for the resonate frequency of 3.75 GHz and 7.10 GHz, correspondingly, which covers two Malaysian 5G, frequency bands. The peak gain is 4.78 dB, and the maximum efficiency is 92%, accordingly to the whole frequency band. The VSWR is ideal at 1.02. Finally, the proposed antenna is an attractive solution for 5G wireless communication..
Application of Industrial Engineering in Garments Sewing Floor
(Daffodil International University, 2020-12-31) Amin, Md. Ruhul; Hossain, Ismail; Masud, Md. Obaidullah Al
This project is on “Application of Industrial Engineering In Garments Sewing Floor”. Traditionally operated garment industries are facing problems like low productivity, longer production lead time, high rework and rejection, poor line balancing, low flexibility of style changeover etc. These problems were addressed in this study by the implementation of lean tools like cellular manufacturing, single piece flow, work standardization, just in time production, etc. After implementation of lean tools, results observed were highly encouraging. Some of the key benefits entail production cycle time decreased by 8%, number of operators required to produce equal amount of garment is decreased by 14%, rework level reduced by 80%, production lead time comes down to one hour from two days, work in progress inventory stays at a maximum of 100 pieces from around 500 to 1500 pieces. Apart from these tangible benefits operator multiskilling as well as the flexibility of style changeover has been improved. This study is conducted in the stitching section of a shirt & pant manufacturing company. Study includes time studies, the conversion of traditional batch production into single piece flow and long assembly line into small wall cell.
Design and Parametric Analysis of a Wide-Angle and Polarization Insensitive Ultra-Broadband Metamaterial Absorber for Visible Optical Wavelength Applications
(Scopus, 22-11-29) Chowdhury, Md Zikrul Bari; Islam, Mohammad Tariqul; Hoque, Ahasanul; Alshammari, Ahmed S.; Alzamil, Ahmed; Alsaif, Haitham; Alshammari, Badr M.; Hossain, Ismail; Samsuzzaman, Md
Researchers are trying to work out how to make a broadband response metamaterial absorber (MMA). Electromagnetic (EM) waves that can pass through the atmosphere and reach the ground are most commonly used in the visible frequency range. In addition, they are used to detect faults, inspect tapped live-powered components, electrical failures, and thermal leaking hot spots. This research provides a numerical analysis of a compact split ring resonator (SRR) and circular ring resonator (CRR) based metamaterial absorber (MMA) using a three-layer substrate material configuration for wideband visible optical wavelength applications. The proposed metamaterial absorber has an overall unit cell size of 800 nm × 800 nm × 175 nm in both TE and TM mode simulations and it achieved above 80% absorbance in the visible spectrums from 450 nm to 650 nm wavelength. The proposed MA performed a maximum absorptivity of 99.99% at 557 nm. In addition, the steady absorption property has a broad range of oblique incidence angle stability. The polarization conversion ratio (PCR) is evaluated to ensure that the MMA is perfect. Both TM and TE modes can observe polarization insensitivity and wide-angle incidence angle stability with 18° bending effects. Moreover, a structural study using electric and magnetic fields was carried out to better understand the MMA’s absorption properties. The observable novelty of the proposed metamaterial is compact in size compared with reference paper, and it achieves an average absorbance of 91.82% for visible optical wavelength. The proposed MMA also has bendable properties. The proposed MMA validation has been done by two numerical simulation software. The MMA has diverse applications, such as color image, wide-angle stability, substantial absorption, absolute invisible layers, thermal imaging, and magnetic resonance imaging (MRI) applications.
Embedded system based bangla intelligent social virtual robot with sentiment analysis
(BRAC University, 2018-04) Hossain, Md. Ishan Arefin; Hossain, Ismail; Hossain, Md. Yousuf; Banik, Mridul; Chakrabarty, Amitabha
Bangla is the mother tongue of millions of people all over the world. Despite of being a very popular language, any social virtual robot that can intelligently communicate in Bangla is a fairytale till now. One of the main reason of this is lack of rich text corpus and previous research on Bangla language. The proposed Bangla Intelligent Social Virtual Robot can communicate in Bangla intelligently and can express its reflective emotion virtually with the help of machine learning algorithms and sentiment analysis. In this paper we discuss the approached system, design methodology and implementation details of first ever Bangla virtual embedded robot followed by the methodology of building a rich Bangla text corpus. The proposed embedded virtual robot turns out better performer when compared with only known Bangla intelligent chatbot named ‘Golpo’ and the embedded system performance efficiency has been upgraded with the help CPU over-clocking technique
Financial Performance Analysis Moriom Enterprise
(Daffodil International University, 2019-12-23) Hossain, Ismail
This report is set up as a section satisfaction for the MBA program of the Faculty of Business and Entrepreneurship under Daffodil International University. The report is set up to think about the Financial Performance Analysis of Moriom Enterprise. I have a chance of spending a time of three months with Clearing & Forwarding Activities . In the initial segment, I incorporated the root of the report, Methodology of the study, Scope of Study, Limitations of the Study. Second part is the hierarchical part. In association part, I endeavor to demonstrate a review of Moriom Enterprise. and there verifiable foundation, Customer focus Information, Vision, Mission, Client List, Service , Organizational Organogram of Moriom Enterprise and SWOT Analysis Third Part discuses about Theoretical Aspects of C & F Agent and financial statement analysis. Fourth Part is adapting some portion of my report. Where I attempt to Financial Performance Analysis of Moriom Enterprise. Which incorporate Common size Statement, Horizontal investigation, vertical examination, Ratio analysis. Last part I distinguish a few issues of Moriom Enterprise and give a few proposals to enhance their administrations.
Gap Coupled Symmetric Square Split Ring High EMR Resonator-Based Metamaterial for S-, C-, and X-Bands Wireless Applications: Simulation and Experiment
(Elsevier, 2023-11-15) Hossen, Shawon; Alqahtani, Abdulrahman; Hossain, Ismail; Islam, Mohammad Tariqul; Moniruzzaman, Md.; Samsuzzaman, Md.
This article describes a metamaterial (MTM) based on a symmetric square ring resonator (SSRR) that exhibits epsilon negative (ENG) and near-zero index (NZI) properties. A 0.035 mm thick copper resonator is used to construct the proposed asymmetric MTM structure, designed on a 1.5 mm thick FR-4 substrate for microwave applications. The MTM structure attained optimum resonance at frequencies corresponding to the microwave frequency range of the S, C, and X bands, 2.88 GHz, 4.78 GHz, and 10.9 GHz, respectively. The near-zero index characteristics are realized in the frequency ranges 2.22–3.17 GHz, 4.52–5.10 GHz, and 9.63–11.36 GHz, while the ENG characteristics are realized in the frequency ranges 2.1–3.2 GHz, 4.57–5 GHz, and 9.7–11.4 GHz. The electrical dimensions of the structure are 0.139λ × 0.139λ × 0.014λ, corresponding to an estimated wavelength of 2.88 GHz. The effective medium ratio (EMR), which for this construction is 7.194, indicates the compactness of the design structure. Using CST 2019 simulation software, the proposed structure is designed and developed before its construction and performance evaluation. The circuit was validated by comparing the S21 response using the Advanced Design System (ADS) software. The response of S21 from the proposed MTM structure was almost identical when it was tested through simulation (using CST and ADS software) or actual measurements. The compact size, substantial electromagnetic response (ER), negative permittivity, almost zero permeability, and refractive index of this MTM make it perfect for wireless applications in S-, C-, and X-bands.
Ground Water Arsenic Contamination and Its Accumulation into Different Varieties of Rice
(University of Rajshahi, 2016) Mondal, A.H.M. Firoz Kabir; Azad, Md. Abul Kalam; Hossain, Ismail; Moniruzzaman, Md.
HYV rice BR-11 and BRRI dhan-50 were grown in an open-field Gangetic soil conditions with arsenic amended irrigation water and normal tap-water in experimental plot at Institute of Environmental Science of University of Rajshahi during August to December 2011 and February to June 2012, respectively. Whereas HYV rice BRRI dhan-36, local Boro variety Somsi and local Aman varieties (Mowka and Shorna) were also cultivated in an actual paddy field conditions with arsenic contaminated STW irrigation water in experimental plots at Mandal para village of Shahbajpur union under Shibganj upazila of Chapai Nawabganj district of Bangladesh during February to June 2012 and July to November 2012, respectively. The main objectives of this study were to observe the effect of arsenic (As) on rice (Oryza sativa L.) plants and the effect of arsenic contaminated pump distance and paddy field elevation on arsenic accumulation into HYV Boro and Aman rice. The tillers number, panicle length and grain yield of BR-11 rice were found to decrease significantly (p≤0.05) with increase of arsenic (As) concentration in irrigation water. Arsenic in irrigation water showed a strong positive correlations with arsenic accumulation into soil, straw and grain, and the trend of accumulation was found as water > soil > straw > grain. Chlorophyll contents of BRRI dhan-50 rice leaves were significantly decreased with increasing of soil residual arsenic. Grain and straw yield were not significantly affected by soil residual arsenic. A significant (p ≤ 0.01) increasing trend of arsenic accumulation into straw and grain was observed with increasing of soil residual arsenic. Arsenic accumulation in drainage sediments, paddy field soil, rice straw and grain were decreased significantly (p<0.01) with increasing of arsenic contaminated pump distance during dry season for Boro cultivation period. Arsenic accumulation in paddy soil, rice straw and grain had significant (p<0.01) negative correlation with paddy field elevation from mean sea level during Aman period (rainy season). Dry season hybrid rice varieties (BRRI dhan 50, BRRI dhan 36) accumulated more arsenic than rainy season local non-hybrid rice varieties. Highest arsenic accumulation in rice grain was 0.97±0.01 mg/kg, but not exceeded the WHO recommended permissible limit 1 mg/kg. Local non-hybrid rice varieties should be selected for arsenic contaminated area. Rice cultivation in upland and irrigation from distanced pump is suggested for less arsenic contamination.
Petrogenesis of Iron ORE Deposits in Hakimpur, Dinajpur District, Bangladesh
(University of Rajshahi, 2024) Hasan, A.S.M. Mehedi; Hossain, Ismail; Zaman, Mohammad Nazim
In Bangladesh, Hakimpur iron deposits has just primarily discovered in Rangpur saddle. In this research, for understanding the tectonogenesis with different rock types and geochronology, the data were obtained from thin section petrography, XRF (X-ray fluorescence), ICP-MS (inductively coupled plasma mass spectrometry), EPMA (Electron Microprobe Analyzer), FE-SEM (Field Emission Scanning Electron Microscope), XRD (X-ray Diffraction), petrography and Raman spectroscopy of fluid inclusion. The Fe-rich deposits in Hakimpur (Bangladesh) are characteristically superior-type banded iron formation (BIF) that shows alternating quartz-rich light and magnetite-rich dark bands, constituting chiefly of opaque minerals (i.e., magnetite, hematite and/or limonite) (35–45 %) and quartz (20–23 %). The BIF bands are found interleaved with amphibolite, biotite schist, and quartzite. The average concentrations of Al2O3, TiO2 and ∑REE in the Hakimpur BIFs are 0.95 wt.%, 0.11 wt.% and 133.75 ppm, respectively. These values indicate that the Hakimpur iron deposits primarily originate from iron-rich chemical sediments, possibly influenced by the addition of terrestrial or volcanic materials. However, markedly low content of trace element compositions such as Cr (<20–110 ppm), Ni (<20–70 ppm), Co (1–43 ppm), V (<5–292 ppm) and Sc (5–54 ppm) clearly indicate the incorporation of terrigenous sediments with passively volcanic materials. REE–Y signatures, Eu/Eu*PAAS, Y/Ho, Eu/Sm and Sm/Yb ratios also suggest the Hakimpur BIFs formed through the precipitation of a blend of low-temperature hydrothermal fluids and seawater, accompanied by a notable detrital contribution. The presence of negative CePAAS anomalies indicates the impact of the global 'Great Oxidation Event' during the depositional period. The combination of geochemical analysis and petrographic investigations reveals that the BIF and rocks associated with BIF originate from chemically precipitated sedimentary origin or sedimentary protoliths. The evidence of isotope (δ18O) and fluid inclusion reflect clay minerals were altered during diagenesis and metamorphism in the sediments as- clay (illite) → chlorite → biotite → amphibole, which is also evident in petrographic results by biotitization, chloritization, silicification, epidotization and saussuritization. The U-Th-Pb geochronological analysis of monazite chemistry provides evidence suggesting that the deposit underwent a solitary medium- grade metamorphic event at 1728±28 Ma (1.73 Ga), coinciding with the magmatic event in the basement rocks of Bangladesh at that time. The metamorphism was took place by the hydrothermal action in orogenic system during concurrent magmatism of Palaeoproterozoic basement complex. Minerals chemistry of amphiboles and biotites of the BIF-hosted rocks also supported this view of the calc-alkaline subduction related orogenic system as demonstrated in the tectonogenetic model. Furthermore, thermobarometric analysis and assessment of oxygen fugacity based on studied minerals such as amphibole (T= 591‒621 °C and P= 6‒8 kbar), biotite (T= 511–582 °C), zircon (T= 677–692 °C), and coexisting magnetite and ilmenite assemblages (T= 522–809 °C and fo2= 10-23.9 to 10-11.9) indicate that the rocks associated with BIF experienced a medium to high-grade metamorphism. This aligns largely with the crystalline temperature characteristics of the basement rock in Bangladesh.
Tunable Cross-Coupled metallic elements loaded epsilon negative and Near-Zero index characteristics based metamaterial
(Daffodil International University, 2023-01-23) Hossain, Ismail; Islam, Mohammad Tariqul; Sahar, Norsuzlin Binti Mohd; Moubark, Asraf Mohamed; Soliman, Mohamed S.; Samsuzzaman, Md
This study examines epsilon-negative (ENG) and near-zero index (NZI) tunable cross-coupled (TCC) met material (MTM) unit cells for multi-band wireless communications. The square split ring resonator (SSRR), a cross-coupled metallic element, and a star-like shape are added at the center of the resonator. The EMR value is 10.24, representing the proposed structure's compactness. The tunability characteristics are investigated by varying the cross-coupled nearby metallic element length within the frequencies of 3.38–3.44 GHz, 7.53–8.0 GHz, and 10.24–10.79 GHz. The NZI characteristics are observed within the frequencies of 3.40–4.66 GHz, 7.41–7.75 GHz, and 10.17–10.31 GHz, respectively, while the ENG characteristics are observed at 2.61–5.15 GHz, 6.43–8.23 GHz, and 9.28–10.45 GHz, respectively. The bandwidth of the designed TCC MTM unit cell is 2.49–4.00 GHz, 6.89–7.83 GHz, and 9.75–10.64 GHz, respectively. The tunability, ENG, and NZI characteristics with a high EMR value enable it for critical microwave applications, including S, C, and X frequency bands. The anticipated structure may be a good candidate for enhancing the gain and bandwidth of the antenna and filter designs and operations, as well as frequency stability and efficiency for multi-band wireless communications.