Journal Vol – 19 No – 2, February 2024

STATE OF ART ON MICROSTRIP RESONATORS, FILTERS, DIPLEXERS AND TRIPLEXERS

Authors:

Yaqeen S. Mezaal, Shahad K. Khaleel, Aqeel A. Al-Hillal, Adham R. Azeez,, Mohammed S. Hemza, Kadhum Al-Majdi

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00001

Abstract:

In today's world, communication is essential for various aspects of life. From military operations and medical systems to community networks, communication plays a crucial role in ensuring the smooth functioning of these applications. With the advancement of technology, communication has become more efficient and has significantly reduced the barriers of distance, bringing people and nations closer together. One of the key components of modern communication systems is microstrip devices. These devices are used in a wide range of applications, including filters, diplexers, and triplexers. Filters are used to selectively allow certain frequencies to pass through while blocking others, making them essential for signal processing and interference reduction in communication systems. Diplexers and triplexers are used to combine or separate multiple signals, allowing for more efficient use of the available frequency spectrum. This article aims to provide an overview of the state-of-the-art microstrip devices used in communication systems. It will review previous studies and advancements in the field, providing insights into the latest developments and technologies. By understanding the current state of research and development in microstrip devices, engineers and researchers can gain valuable knowledge to improve the performance and efficiency of communication systems. Furthermore, the article will explore the potential applications of microstrip devices in various communication systems, such as satellite communications, wireless networks, and radar systems. Understanding the capabilities and limitations of these devices will be crucial for optimizing their performance in different scenarios. Overall, this article will serve as a comprehensive resource for anyone interested in the role of microstrip devices in communication systems. Delving into the scope of filters, diplexers, and triplexers, will provide valuable insights into the advancements and potential future developments in this important area of technology.

Keywords:

Microstrip,Bandpass Filter,Diplexer,Triplexer,

Refference:

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DEVELOPMENT OF A THEORETICAL MODEL TO ESTIMATE THE EROSION WEAR RATE OF POLYMER COMPOSITES

Authors:

Raffi Mohammed, C Sailaja, Subhani Mohammed, Kiran Kumar Bunga

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00002

Abstract:

Nowadays Polymeric materials reinforced with synthetic fibers play an incredible role in almost all spheres of day-to-day life due to their elevated stiffness, outstanding strength-to-weight ratio, and electrical, thermal, and wear properties. The accumulation of micro-fillers or particulates in polymeric components reinforced with fibers made from synthetic materials may enhance their properties compared to fiber-reinforced composites. Solid particle erosion of engineering components made up of polymer composites is a major industrial problem, and it is significantly affected by the components' mechanical characteristics and their working environment. Therefore, it's essential to research the polymer composites' solid particle erosion properties. One area that has attracted less research attention is the impact of particle fillers and E-glass fiber reinforcing on erosion wear characteristics. Because of its significance to science and industry, research in this area is especially needed about particle fillers. Furthermore, to properly design a machine or structural component and use materials that will increase wear resistance, one must have a thorough grasp of how every system variable affects wear rate. In this research article, to estimate the erosion damage induced by solid particle impact on composites without conducting the experiment on an air jet erosion test rig, a theoretical model is proposed. The successful implementation of this theoretical model can reduce the experimentation cost with good quantitative accuracy.

Keywords:

Erosion,Erosion Modeling,Air-jet erosion test rig,Operating Parameters,Theoretical Model,

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AI FOR INFANT WELL-BEING: ADVANCED TECHNIQUES IN CRY INTERPRETATION AND MONITORING

Authors:

Ananjan Maiti, Chiranjib Dutta, Jyoti Sekhar Banerjee, Panagiotis Sarigiannidis

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00003

Abstract:

In order to improve the welfare of newborns, this study investigates the use of sound-recognition-based artificial intelligence (AI) approaches to the interpretation and monitoring of infant screams. Crying has long been a problem because it is the primary means of communication between infants and caregivers. The limitations of conventional interpretation techniques are discussed. These limitations include the subjective nature of interpretation and the inability to detect subtle variations in crying patterns. The goal of the research is to categorize crying patterns based on the cries of male and female infants and identify noises that are a sign of distress. The study utilized the Mel Frequency Cepstral Coefficients (MFCC) method to extract features from internet-sourced MP3 and WAV audio data. The technique successfully captured the unique qualities of each crying sound using various machine-learning models, including Random Forest and XGBoost. These models outperformed others with accuracy rates of 94.5% and 94.2%, respectively. These findings show how well these algorithms perform in correctly categorizing various newborn cries. The findings of this study establish the platform for possible Internet of Things (IoT) and healthcare framework implementations targeted at supporting parents in caring for their newborns by offering an insightful understanding of the distinctive vocalizations connected with weeping.

Keywords:

infant cry interpretation,machine learning,artificial intelligence,infant monitoring,real-time systems,privacy concerns,XGBoost,

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HARNESSING CLOUD OF THING AND FOG COMPUTING IN IRAQ: ADMINISTRATIVE INFORMATICS SUSTAINABILITY

Authors:

Mohammed Q. Mohammed, Yaqeen S. Mezaal, Shahad K. Khaleel

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00004

Abstract:

This article provides an overview of cloud computing and fog computing, as well as a discussion of the potential applications of these technologies in Iraq. The ability of cloud computing to provide scalable and adaptable computer resources on demand has led to a significant uptick in interest in this computing model all around the world. However, fog computing improves cloud computing by moving computation to devices that are positioned on the edge of a network. This research investigates the up-to-date applications of cloud computing and fog computing in Iraq, as well as the challenges that have been faced and the potential applications of these technologies in the future, particularly in the areas of agriculture, transportation, and healthcare. The use of questionnaires in research will be the topic of discussion in this study. This is made up of two different parts that work separately. In the first part of our survey, we ask respondents questions about their level of expertise with direct and indirect cloud on object and fog computing. The remaining aspects of the investigation are dissected in Part 2 of the study. These inquiries are in accordance with concerns regarding the complexity of the implementation process, the size and culture of an organization, practicability, compliance with legislation, compatibility with current systems, and support from the government. The final open-ended inquiry of the survey will assist us in compiling a wide variety of opinions on the types of cloud-on-object and fog computing services that are required by the Iraqi government.

Keywords:

Cloud of Thing,Fog Computing,Governmental support,Administrative Informatics Sustainability,

Refference:

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FUNCTIONAL ASSESSMENT OF WAVE PROPAGATION IN IMPERFECT CYLINDER MATERIALS

Authors:

L. Anitha, R. Mehala Devi

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00005

Abstract:

This work provides a theoretical framework to investigate the shear wave propagation properties within an Electrostrictive cylindrical layered structure. The structure is made up of a concentric, Functionally Assessed Electrostrictive Material (FAEM) cylindrical layer of limited width and an inadequately bonded Electrostrictive material cylinder. The FAEM layer has a constant functional gradient in the radial direction, and flaws at the interface are taken seriously, mirroring actual circumstances involving structural and electrical degradation. The fundamental electromechanical connected Bessel's equations are used to simplify field differential equations by mathematical modifications. Relationships for shear wave propagation under electrically short and open circumstances are established analytically. The acquired findings are verified against predefined standards and a particular issue instance. The impact of variables on the phase velocity of shear waves, including functional range and imperfection parameters, is shown through numerical simulations and graphical displays. The research also establishes boundaries for electrically short and open circumstances, taking into account the shear defect that exists between the inner and outer cylindrical layers.

Keywords:

Shear Wave Propagation,Cylinder,Electrostrictive Materials,Functional Assessment,

Refference:

I. Chaudhary, S., Sahu, S.A., Singhal, A. and Nirwal, S., 2019. Interfacial imperfection study in a pres-stressed rotating multiferroic cylindrical tube with wave vibration analytical approach. Materials Research Express, 6(10), p.105704.

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III. Di Stefano, S., Miller, L., Grillo, A. and Penta, R., 2020. Effective balance equations for electrostrictive composites. Zeitschrift für angewandte Mathematik und Physik, 71, pp.1-36.

IV. Liang, C., Yaw, Z. and Lim, C.W., 2023. Thermal strain energy induced wave propagation for imperfect FGM sandwich cylindrical shells. Composite Structures, 303, p.116295.

V. Luo, H., Tao, M., Wu, C. and Cao, W., 2023. Dynamic response of an elliptic cylinder inclusion with imperfect interfaces subjected to plane SH wave. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 9(1), p.24.

VI. Manduca, A., Bayly, P.V., Ehman, R.L., Kolipaka, A., Royston, T.J., Sack, I., Sinkus, R. and Van Beers, B.E., 2021. MR elastography: Principles, guidelines, and terminology. Magnetic resonance in medicine, 85(5), pp.2377-2390.
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VIII. Ming, T., Hao, L., Rui, Z. and Gongliang, X., 2023. Dynamic response of an elliptic cylinder inclusion with imperfect interfaces subjected to plane SH wave (No. EGU23-7726). Copernicus Meetings.

IX. Pankaj, K.K., Sahu, S.A. and Kumari, S., 2020. Surface wave transference in a piezoelectric cylinder coated with reinforced material. Applied Mathematics and Mechanics, 41, pp.123-138.

X. Reijmers, J.J., Kaminski, M.L. and Stapersma, D., 2022. Analytical formulations and comparison of collapse models for risk analysis of axisymmetrically imperfect ring-stiffened cylinders under hydrostatic pressure. Marine Structures, 83, p.103161.

XI. Ryu, J. and Jeong, W.K., 2017. Current status of musculoskeletal application of shear wave elastography. Ultrasonography, 36(3), p.185.

XII. Singhal, A., Baroi, J., Sultana, M. and Baby, R., 2022. Analysis of SH-waves propagating in multiferroic structure with interfacial imperfection. Mechanics Of Advanced Composite Structures, 9(1), pp.1-10.

XIII. Trujillo, D.P., Gurung, A., Yu, J., Nayak, S.K., Alpay, S.P. and Janolin, P.E., 2022. Data-driven methods for discovery of next-generation electrostrictive materials. npj Computational Materials, 8(1), p.251.

XIV. Uchino, K., 2017. The development of piezoelectric materials and the new perspective. In Advanced Piezoelectric Materials (pp. 1-92). Woodhead Publishing.

XV. Wijeyewickrema, A.C. and Leungvichcharoen, S., 2022. Effect of imperfect contact on the cloaking of a circular elastic cylinder from antiplane elastic waves. Mechanics Research Communications, 124, p.103964.

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A NOVEL CONCEPT OF THE THEORY OF DYNAMICS OF NUMBERS AND ITS APPLICATION IN THE QUADRATIC EQUATION

Authors:

Prabir Chandra Bhattacharyya

DOI NO:

https://doi.org/10.26782/jmcms.2024.02.00006

Abstract:

Considering the basic role of numbers in Mathematics, Science, and Technology the author developed a new structure of numbers named as ‘Theory of Dynamics of Numbers.’ According to the Theory of Dynamics of Numbers, the author defined 0 (zero) is the starting point of any number and also defined 0 (zero) as a neutral number. The numbers can move in infinite directions from the starting point 0 (zero) and back to 0 (zero). The author has defined the three types of numbers: 1) Neutral Numbers, 2) Count Up Numbers, and 3) Count Down Numbers. These three types of numbers cover the entire numbers in the number system where there is no necessity for the concept of imaginary numbers. Introducing this new concept the author solved the quadratic equation in one unknown (say x) in the form ax2 + bx + c = 0, even if the numerical value of the discriminant b2 – 4ac < 0 in real numbers without using the concept of imaginary numbers. Already the author solved the quadratic equation x2 + 1 = 0 and proved that  √ -1 = -1  by using the Theory of Dynamics of Numbers. The Theory of Dynamics of Numbers is a more powerful tool than that of the real and imaginary number system to explain the truth of nature.

Keywords:

Cartesian Coordinate System,Imaginary Numbers,Quadratic Equation,Rectangular Bhattacharyya’s Coordinate System,Theory of Numbers,Theory of Dynamics of Numbers.,

Refference:

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