Browsing by Author "Barid, Mimun"

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Design and Analysis of Heptagonal Cladding with Rotated-hexa Elliptical Core Based PCF for the Applications of Communication Sectors in the THZ Region
(Optical and Quantum Electronics, Springer, 2021-11-02) Hossain, Md. Selim; Barid, Mimun; Sen, Shuvo; Azad, Mir Mohammad; Haque, Md. Dulal
Photonic crystal fiber-based heptagonal cladding with the elliptical rotated-Hexa core is reported in the terahertz waveguide for the applications of communication area in this paper. By utilizing the photonic crystal fiber concept, all numerical results have been obtained by the finite element method with perfectly matched layers based on the COMSOL Multiphysics computer software tool. This H-PCF fiber shows a low effective material loss of 0.0076 cm−1, with a larger effective area of 5.95 × 10–8 m2, power flows within the core area of 90%, confinement loss of 3.35 × 10–16 cm−1, and scattering loss of 1.24 × 10–10 cm−1 at 1 THz. Besides, other optical properties like confinement loss, scattering loss, power fraction, V-parameter, and effective area have also been considered briefly. So, it is expected that the mentioned H-PCF structure-based waveguide will significantly improve many kinds of communication fields of the THz technology.
Large Effective Area with High Power Fraction in the Core Region and Extremely Low Effective Material Loss-based Photonic Crystal Fiber ((PCF) in the Terahertz (THz) Wave Pulse for Different Types of Communication Sectors
(Journal of Optics, Springer, 2021-07-04) Hasan, Md. Mahamudul; Barid, Mimun; Hossain, Md. Selim; Sen, Shuvo; Azad, Mir Mohammad
In this work, an excellent design of photonic crystal fiber (PCF) with five layers of a hexagonal lattice of air holes (AHs) of cladding region as well as two elliptical air holes in the core area (CA) has been presented for terahertz (THz) wave pulse propagation. The finite element method with perfectly matched layers has been used to design our proposed fiber L-PCF to achieve the low effective material loss (L-EML) in the terahertz regime for communication applications. After the simulation procedure, our proposed low-loss PCF (L-PCF) fiber shows a low effective material loss of 0.007 cm−1, with power fraction (PF) in the core area of 80% and a large effective area of 3.46 × 10–8 m2 at 1 terahertz (THz). Moreover, other optical properties such as V-parameter, scattering loss, and confinement loss are also reported here. For different types of optical and telecommunication applications, our suggested L-PCF fiber will be highly suitable at the terahertz (THz) wave guiding.
Observations on big data concerning storage and security management
(2024-02-08) Hasan, Mohammad Manzurul; Ali, Shaulin; Mahmood, Faisal Wazed; Hossain, Shahadat; Rahman, Mohammad Mahmudur; Barid, Mimun
Due to the exponential rate of expanding data, the interest in big data terminology is growing in both logical and physical disciplines for its potential efficacy. The Internet of Things (IoT) and cloud computing hold terabytes of data, which invokes this interest. A proper database management system helps to boost institutional access to data, which ultimately benefits the use significantly. Furthermore, a management system is required to obtain timely answers to database queries. This research aims to review and summarize the most commonplace security management and storage management of large databases. We examine various fundamental standards and security issues with databases and present a comprehensive overview of initiatives inside and outside the enterprise to effect this objective. Usually, we consider metadata when we try to find something from Google or other search engines. As a result, we like to determine the most efficient metadata systems. Finally, our study provides some observations and suggestions about the administration of big data storage and securities and encourages us to pay heed to this domain.