Browsing by Author "Islam, M.T."

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A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators
(Hindawi, 2014-05-22) Islam, M. M.; Faruque, M.R.I.; Islam, M.T.
A band-removal property employing microwave frequencies using complementary split ring resonators (CSRRs) is applied to design a compact UWB antenna wishing for the rejection of some frequency band, which is meanwhile exercised by the existing wireless applications. The reported antenna comprises optimization of a circular radiating patch, in which slotted complementary SRRs are implanted. It is printed on low dielectric FR4 substrate material fed by a partial ground plane and a microstrip line. Validated results exhibit that the reported antenna shows a wide bandwidth covering from 3.45 to more than 12 GHz, with a compact dimension of 22 × 26 mm2, and VSWR < 2, observing band elimination of 5.5 GHz WLAN band. Full Text Link: http://dx.doi.org/10.1155/2014/528489
A compact disc-shaped printed antenna using parasitic element on ground plane for super wideband applications
(ACES, 2016-08) Islam, M. M.; Faruque, M.R.I.; Islam, M.T.
A microstrip line-fed monopole antenna is proposed and investigated using a structure of parasitic element for super-wideband applications. The parasitic element consists of 4 rectangular embedded slots on the ground plane. This parasitic element on the ground plane leads the UWB frequency band into the SWB frequency band. This proposed monopole antenna is fed by a microstrip line and is printed on low dielectric FR4 material of 1.6 mm thickness. All the simulations are performed using commercially available, finite element method (FEM) based Ansoft high-frequency structure simulator (HFSS) software and CST Microwave Studio. Measured results exhibit that the proposed disc-shaped antenna shows a wide bandwidth which covers from 2.90 GHz to more than 20 GHz, with a compact dimension of 25 mm × 33 mm for VSWR <2, observing an extended ultra-wideband frequency. A good combination is noticed between simulation and measurement. This proposed SWB antenna delivers impedance bandwidth covering the L, C, X, Ku bands and points out sharply surface current flow and nearly omnidirectional radiation patterns, which is appropriate for UWB or SWB applications.
A Compact Patch Antenna for Ultrawideband Application
(IEEE, 2016-10-28) Islam, M. Tarikul; Samsuzzaman, M.; Islam, M. M.; Mahmmud, M.Z.; Islam, M.T.
A compact microstrip line fed tapered-shaped slotted ultra-wideband(UWB) antenna is presented. The new design is composed of a rectangular slotted patch with a compact size of 21.44 × 23.53 mm2 and fed by microstrip transmission line of 50 Ω. The proposed antenna is simulated onto a less expensive FR4 substrate which has a height of 1.6 mm. There achieved a wider bandwidth of 8.51 GHz (3.49-12 GHz) with good impedance matching, constant gain, 5.76 dBi of maximum gain and stable radiation pattern results in the proposed antenna more appropriate for using UWB communication applications compared to existing antennas. The proposed antenna is designed and simulated in HFSS and CST Microwave Studio software to see the antenna performance.
Assessment of antiemetic activity of dihydrocoumarin: In vivo and in silico approaches on receptor binding affinity and modulatory effects
(Elsevier Inc., 2024-09-22) Saim, M.A.; Bhuia, M.S.; Eity, T.A.; Chowdhury, R.; Ahammed, N.T.,; Ansari, S.A.; Hossain, K.N.; Luna, A.A.; Munshi, M.H.; Islam, M.T.
Dihydrocoumarin (DCN) is a natural compound widely used in the flavor industry and has antioxidant and anti-inflammatory properties. However, its potential antiemetic effects on gastrointestinal disturbances remain untested. This study emphasizes assessing the antiemetic properties of the natural aromatic compound DCN using copper sulfate (CuSO4.5H2O)-induced emetic model on chicks, and an in silico approach was also adopted to estimate the possible underlying mechanisms. Two doses (25 and 50 mg/kg b.w.) of DCN and several referral drugs considered positive controls (PCs), including domperidone (6 mg/kg), hyoscine (21 mg/kg), aprepitant (16 mg/kg), diphenhydramine (10 mg/kg), and ondansetron (5 mg/kg), were orally administered to chicks. The vehicle was provided as the control group. Co-treatments of DCN with referral drugs were also provided to chicks to evaluate the modulatory action of the test compound. According to the results, DCN delayed the emetic onset and decreased the frequency of retches in a dose-dependent manner compared to the vehicle group. DCN (50 mg/kg) represented a notable delayed latency period (61.17 ± 4.12 s) and a diminished number of retchings (17.67 ± 1.82 times) compared to the control group. Further, in the co-treatments, DCN increased the latency period and reduced the number of retches, except for domperidone. In the in silico investigation, DCN showed notable binding affinity toward the D2 (−7 kcal/mol), H1 (−7.5 kcal/mol), and M5 (−7 kcal/mol) receptors in the same binding site as the referral ligand. Our research indicates that DCN has mild antiemetic properties by interacting with the D2, H1, and M5 receptors. Therefore, several pre-clinical and clinical studies are necessary to assess the effectiveness and safety profile of this food ingredient
Circularly polarized patch antenna for S-band satellite applications
(IEEE, 2015-10-01) Azim, R.; Samsuzzaman, M.; Alam, T.; Islam, M.T.; Faruque, M.R.I.; Zaman, M. R.; Islam, M. M.
In this paper, a circularly polarized antenna is proposed for satellite communication system. Commercially available Finite Integration Technique (FIT) based software Computer Simulation Technology (CST) microwave studio and finite element method solver based High Frequency Structural Simulator (HFSS) have been used in this analysis. The proposed antenna achieved 3dB axial ratio of 30 MHz with -10dB reflection coefficient. The axial ratio and reflection coefficient has been verified with both CST and HFSS simulation software. The operating frequency of the proposed antenna is 2.35 GHz. The antenna has been printed on FR-4 (lossy) Substrate material with relative Permittivity of 4.6 and thickness of 1.6 mm. The proposed antenna exhibits a 3 dB axial-ratio beam width of more than 1420. Full Text Link: http://doi.org/10.1109/IconSpace.2015.7283837
Compact metamaterial antenna for UWB applications
(IEEE, 2015-08-06) Islam, M.M.; Islam, M.T.; Samsuzzaman, M.; Faruque, M.R.I.
A compact antenna is proposed using planar-patterned metamaterial structures for ultra-wideband applications. This antenna consists of four metamaterial unit cells that simultaneously show both negative permeability and negative permittivity on the triangular patch and three rectangular slots on the partial ground plane fed with a microstrip line. It has a wide bandwidth from 3.07 to 19.91 GHz for voltage standing wave ratio (VSWR) <;2 and an average gain of 5.62 dBi with a peak of 8.57 dBi because of using planar-patterned metamaterial structures. Good agreement between computations and experiments is realised convincing that the antenna can operate over a wide bandwidth with planar-patterned metamaterial structures and compact size (0.28 λ × 0.19 λ × 0.02 λ ). Full Text Link: http://doi.org/10.1049/el.2015.2131
Context specific safe water supply technologies for vulnerable climatic and geomorphologic areas of Bangladesh
(© 2016 Published by BRAC University, 2016) Zahid, Anwar; Rashid, S.M.A.; Miah, M.A. Salam; Halder, Joseph; Islam, M.T.; Tazneen, Farhana
The detection of arsenic in shallow groundwater threatens groundwater based water supply in Bangladesh. Seawater encroachment in coastal aquifers is another major problem for the availability of fresh water. On the other hand, surface water source is not suitable in many parts of the country. In addition, vu1nerable climatic conditions and anticipated impact of climate change arc putting more stress on the sustainable development of safe water resources. Therefore, one technology is not suitable for all areas due to different hydro meteorological conditions. The aim of this paper is to determine sustainable context-specific water supply technologies considering the climatic hazard and other vu1nerabilities in 5 different hard to reach (HtR) areas, which are (a) drought prone, (b) flood prone, (c) char (sand bar), (d) coastal and (e) haor (swamp) areas. It is found from the study that more activities and effort is needed to ensure the water supply facilities for all, mainly in the HtR areas. Still expansion and improvement of the water supply services is required to satisfy the basic needs in these areas. Proper maintenance and monitoring of existing appropriate technologies arc also important for sustainable use. Guidelines and user manuals need to be prepared as a tool to standardized procedures for installation and easy maintenance of technologies.
Design of a Ku-band patch antenna with enhanced bandwidth
(Universiti Kebangsaan Malaysia, 2014-03-27) Islam, M. M.; Faruque, M.R.I.; Aziz, R.; Islam, M.T.; Alam, T.
In this paper, a Ku-band patch antenna with Enhanced bandwidth has been proposed. The proposed Ku-band antenna is made of rectangular slots and circular slots on the ground and the patch, respectively with a microstrip line of 50 O. It is designed on a printed circuit board of 40 mm × 40 mm× 1.6 mm using FR4 as a substrate material. High Frequency Structural Simulator (HFSS) is commercially available, which has been considered in this study depending on the concept of the Finite Element Method (FEM). 1.75 GHz (14.58 GHz to 16.33 GHz) is the achieved bandwidth of the proposed Ku-band antenna. The average gain is 1.85 dB where 2.90 dB is the maximum gain. The proposed Ku-band patch antenna shows durable omni-directional radiation patterns. The proposed patch antenna has been discussed in detail.
Design of an X-band microstrip patch antenna with enhanced bandwidth
(IEEE, 2014-03-03) Islam, M.M.; Islam, M.T.; Faruque, M.R.I.; Hueyshin, W.
In this paper, an X-band microstrip patch antenna has been presented with enhanced bandwidth. The proposed antenna is designed on 40 mm×40mm printed circuit board and is excited by microstrip line. Commercially available High Frequency Structural Simulator (HFSS) is adopted in this study This antenna is composed of rectangular and circular slots to generate two resonances and to increase bandwidth in the desired band. Return loss -17.14 dB and -14.29 dB are obtained below -10 dB in the desired X-band (8GHz-12GHz). It has achieved stable radiation efficiency 78.85% with average peak gain 4.31 dBi in the operating frequency band. The proposed antenna has an impedance bandwidth 1.59 GHz. The proposed X-band patch antenna is discussed and presented in detail. Full Text Link: http://doi.org/10.1109/ICAEE.2013.6750355
Detection of breast cancer using electromagnetic techniques: A review
(IOS Press, 2016-07-08) Islam, M.M.; Faruque, M.R.I.; Misran, N.; Islam, M.T.
Breast cancer is the most well-known malignancy of non-skin and the second leading reason of cancer death among the women in the world after the lung cancer. In this review, the development of the microwave imaging system is described for breast cancer detection depending on the ultra-wideband imaging system, which is a promising emerging technology that uses the dielectric contrast between malignant, benignant and normal fibro glandular breast tissues at the microwave frequencies. Some breast cancer detection techniques such as Magnetic Resonance Imaging (MRI), Mammography, Ultra-Wide Band (UWB), Ultrasound and their performances have also been reviewed. There are some restrictions of the existing UWB imaging systems such as they have no ability to detect the breast tumor at the beginning period, having no 3D pictorial representation of tumor size in all systems and a multiple array antenna in respect of complex system. This encourages the improvement of the extended signal processing techniques for ultra-wideband imaging systems and initiates a more appealing imaging scenario. The limitations and running challenges of the microwave imaging system have been discussed completely with some feasible suggestions. Confidently, this thorough survey has been done here to overcome this limitations of the existing and proposed systems. Full Text Link: http://doi.org/10.3233/JAE-150050
Dual-Band Operation of a Microstrip Patch Antenna on a Duroid 5870 Substrate for Ku- and K-Bands
(Hindawi, 2013-11-14) Islam, M.M.; Islam, M.T.; Faruque, M. R. I.
The dual-band operation of a microstrip patch antenna on a Duroid 5870 substrate for Ku- and K-bands is presented. The fabrication of the proposed antenna is performed with slots and a Duroid 5870 dielectric substrate and is excited by a 50 Ω microstrip transmission line. A high-frequency structural simulator (HFSS) is used which is based on the finite element method (FEM) in this research. The measured impedance bandwidth (2 : 1 VSWR) achieved is 1.07 GHz (15.93 GHz–14.86 GHz) on the lower band and 0.94 GHz (20.67–19.73 GHz) on the upper band. A stable omnidirectional radiation pattern is observed in the operating frequency band. The proposed prototype antenna behavior is discussed in terms of the comparisons of the measured and simulated results. Full Text Link: http://dx.doi.org/10.1155/2013/378420
EFFECT OF ARTIFICIAL INSEMINATION ON PREGNANCY RATE IN COWS AT MYMENSINGH DISTRICT IN BANGLADESH
(Sher-e-Bangla Agricultural University Research System (SAURES), Dhaka, Bangladesh, 2011) Shohiduzzaman; Hossain, M. M.; Alam, J.; Islam, M.T.
The study was conducted to determine the factors those affect the tirst service pregnancy rate (PR). A total of 180 cows, local 80, LocalxHolstein·Friesian(LxHF) 55 and localxSahiwal (LxSL) 45 were selected tram January, 2011 to December 2011 to identify the potential risk factors such as body weight, breed, age, body condition score (BCS) and season to first service. Overall pregnancy rate at first Al (FAI) was 53.3% (n=96). The highest pregnancy rate (56.3%) was observed in local cows, which was significantly (p<0.05) higher than that of Holstein-Friesian x Local (47.3%) cows. Cows of 4-5 years of old revealed a significantly (p<0.05) higher pregnancy rate than that of cows of 2·3 years age. The higher pregnancy rate (64.5%) was in cows of BCS 3.5 than lower BCS 2.5 cows (31%; p<0.05). The pregnancy rate was higher in cows weighing between 151-250 kg (57.1 %) and lower in cows up to 150 kg body weight (35%, p<0.05). Cows showed significantly (p<0.05) higher PR (59.6%) when FA! was done in winter (November-February) compared to spring (March- April) calving cows (55.6%).
Effect of core material draft ratio and denier on core spun yarn and denim fabric properties pre and post washing
(Elsevier Ltd, 2024-01-17) Hossain, M.A.; Hossain, M.A.,; Emon, J.H.; Islam, M.T.
Core-spun yarn (CSY) is utilized for better fabric characteristics like stretchability, durability, and comfortability. The study aims to investigate the influence of spandex drafts of core-spun yarn on denim fabric characteristics before and after washing treatment. Two types of denim fabrics were produced from two types of core-spun yarn, namely 16 + 40D, and 16 + 70D by applying 2.8, 3.0, 3.20 spandex drafts for 16 + 40D, and 3.40, 3.50, 3.60 spandex drafts for 16 + 70D. Prepared denim fabrics were desized, and acid-washed and the properties of denim fabric before and after washing were investigated as a function of spandex drafts and deniers. Accurate count, twist, and better elongation percentage were observed at 2.80 draft for 16 + 40D CSY and 3.4 draft for 16 + 70D CSY, but a higher imperfection index (IPI) value was obtained on those drafts. The strength of the denim fabric prepared with 16 + 40D CSY and 16 + 70D CSY were higher at 2.8 and 3.6 drafts, respectively. Higher shrinkage (%), ends per inch (EPI), and fabric weight of denim fabric was obtained after washing compared to before washing. The width of both fabrics decreased when the fabric was washed. Exploring various drafts of core material and their correlations with yarn and fabric properties provides valuable insights for textile manufacturers seeking to produce denim fabrics with optimum quality.
Investigation of a planar antenna with bandwidth enhancement for X-band applications
(Universiti Kebangsaan Malaysia, 2014-05-01) Faruque, M.R.I.; Islam, M.M.; Islam, M.T.
Planar antennas play an important role in wireless communications systems and they continue to face shifting demands for a new generation of antenna technologies. One of the widely used antennas is the microstrip patch, as it offers a low profile, conformal design, ease of manufacture and integration, and it is low cost and lightweight. Its main disadvantages, however, are narrow bandwidth and low efficiency, so increasing its bandwidth is the main focus of many research projects. Work on the design of this type antennas continues, and various techniques are being used, including increased substrate thickness, changing the patch by cutting rectangular slots and the ground plane. The geometry of the proposed microstrip antenna was designed using equations from the transmission line model (TEM) approximation.
Medicinal Plant Classification Using Particle Swarm Optimized Cascaded Network
(Institute of Electrical and Electronics Engineers Inc., 2024-01-12) Islam, M.T.; Rahman, W.; Hossain, M.S.; Roksana, K.; Azpiroz, I.D.,; Diaz, R.M.; Ashraf, I.; Samad, M.A.
Medicinal plants are essential to healthcare since ancient times and are integral to developing drugs and other medical treatments. More than 25% of medicines in developed countries are produced from medicinal plants, while in developing countries, approximately 80% of individuals receive primary healthcare from these plants. Traditionally, these plants are identified manually by experts, which is tedious, time-consuming, subjective and dependent on the availability of experts. Furthermore, a wrong detection can result in serious health issues or death. This signifies the need for a more reliable approach to identifying medicinal plants, which is accurate and practical. Several automated methods were proposed previously, utilizing deep learning and traditional machine learning (TML) techniques, but they require singular leaf images and failed to achieve sufficient accuracy when demonstrated in a different setting. Capturing singular leaf images for each plant is also time-consuming and laborious. This paper presents a robust, accurate and practical system to identify medicinal plants from smartphone-captured plant images in the site of plants. The proposed system utilized a cascaded architecture to extract features using a pre-trained ResNet50 model, which were optimized using Particle Swarm Optimization (PSO) to classify the plants using a Support Vector Machine (SVM). The proposed ResNet50-PSO-SVM network classified seven medicinal plants with 99.60% accuracy, outperforming the state-of-the-art (99%). The system was demonstrated for three different smartphones, classifying an image in 0.15 seconds with 97.79% accuracy on average. The system's high accuracy, rapid identification time and robustness ensured its practical use.
Miniaturized dual band Y shaped antenna by high dielectric ceramic filled bio plastic composite material
(IOS Press, 2016-02-18) Samsuzzaman, M.; Islam, M.T.; Mandeep, J.S.; Mahmud, M.Z.; Alam, T.; Islam, M. M.
A miniaturized multiband printed antenna designed for high dielectric ceramic filled Bio plastic composite material is presented. The multiband antenna formed by Y shaped patch with a partial ground plane. The performance benchmarks of the proposed antenna have been experimentally verified by fabricating a printed prototype. The experimental results confirm that the proposed antenna achieves -10 dB impedance bandwidth of 10.07% (1.79-1.98 GHz) at lower band and 8.83% (2.38-2.6 GHz) at the upper band, respectively. The antenna configuration and parametric study have been carried out with the help of the commercially available EM simulator and a good harmony is apparent between experimental and numerical results. Moreover, the antenna has a simple planar structure of a small area of only 38 mm × 40 mm. The proposed antenna can operate PCS1900 and WLAN bands. Good radiation characteristics, gain and radiation efficiency are obtained over these operating bands. Full Text Link: http://doi.org/10.3233/JAE-150087
Omni-directional microstrip monopole antenna for UWB microwave imaging system
(IEEE, 2015-08-27) Islam, M. M.; Islam, M.T.; Samsuzzaman, M.; Faruque, M. R. I.; Misran, N.
A miniaturized ultra-wideband antenna is presented for using in microwave imaging systems. This antenna structure consists of a radiating patch, a microstrip transmission line, and a partial ground plane which provides a wide bandwidth covering from 3.65 GHz to more than 11 GHz frequency. It has overall dimensions of 16 mm × 21 mm× 1.6 mm with a compact size. Negligible distortion is observed from the time domain characteristic of the proposed UWB antenna. It is appropriate for using in the field of microwave imaging systems due to its short pulse operation. The proposed antenna shows good directional radiation pattern, considerable gain level, surface current distribution and correlation coefficient for using in the microwave imaging systems. Full Text Link: http://doi.org/10.1109/I4CT.2015.7219645
Paddy insect identification using deep features with lion optimization algorithm
(Elsevier Ltd, 2024-06-05) Elmagzoub, M.A.; Rahman, W.; Roksana, K.; Islam, M.T.; Sadi, A.H.M.S.; Rahman, M.M.; Rajab, A.; Rajab, K.; Shaikh, A.
Pests are a significant challenge in paddy cultivation, resulting in a global loss of approximately 20 % of rice yield. Early detection of paddy insects can help to save these potential losses. Several ways have been suggested for identifying and categorizing insects in paddy fields, employing a range of advanced, noninvasive, and portable technologies. However, none of these systems have successfully incorporated feature optimization techniques with Deep Learning and Machine Learning. Hence, the current research provided a framework utilizing these techniques to detect and categorize images of paddy insects promptly. Initially, the suggested research will gather the image dataset and categorize it into two groups: one without paddy insects and the other with paddy insects. Furthermore, various pre-processing techniques, such as augmentation and image filtering, will be applied to enhance the quality of the dataset and eliminate any unwanted noise. To determine and analyze the deep characteristics of an image, the suggested architecture will incorporate 5 pre-trained Convolutional Neural Network models. Following that, feature selection techniques, including Principal Component Analysis (PCA), Recursive Feature Elimination (RFE), Linear Discriminant Analysis (LDA), and an optimization algorithm called Lion Optimization, were utilized in order to further reduce the redundant number of features that were collected for the study. Subsequently, the process of identifying the paddy insects will be carried out by employing 7 ML algorithms. Finally, a set of experimental data analysis has been conducted to achieve the objectives, and the proposed approach demonstrates that the extracted feature vectors of ResNet50 with Logistic Regression and PCA have achieved the highest accuracy, precisely 99.28 %. However, the present idea will significantly impact how paddy insects are diagnosed in the field.
Silk-Templated Nanomaterial Interfaces for Wearables and Bioelectronics: Advances and Prospects
(American Chemical Society, 2022-01-03) Ahmed, A.; Bain, S.,; Prottoy, Z.H.; Morsada, Z.; Islam, M.T.; Hossain, M.M.; Shkir, M.
Soft, wearable, stretchable, and flexible devices are intriguing in electronic fields, as they offer light weight, user-friendliness, and high-throughput performance. Electronic devices derived from bioresources spurred augmented benefits typically in terms of sustainability, biocompatibility, biointegration, and their device utilization in copious electronic fields such as biomedical healthcare, sensing, energy, intelligent clothing, and so forth. Significantly, the natural biopolymer silk has extensively been explored to design wearable electronic devices because of its excellent attributes and active functional sites present in their structures. Consequently, silk is being integrated with various carbon-based fillers, metallic interfaces, conducting polymers, etc. This review provides a comprehensive overview of silk integrated nanomaterial structures for wearable and bioelectronics applications. The outstanding structural features of silk materials have been discussed, summarizing their intrinsic properties and performance matrices for integration with various nanomaterials. Several silk/nanomaterial-enabled bioelectronics applications are presented, and in the end, future opportunities are also envisioned.