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81 articles for “Wave number”
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Simulation of Flow Vorticity and Instability Analysis in a Solid Rocket Motor
Abstract: Combustion instability is a major problem in most solid rocket motor (SRM) during its operation. More form of instability is generated due to several factors like coupling of combustion acoustic waves with flow dynamics, grain configuration, combustion chamber design, combustible mixture, etc. This type of flow turbulence is sustained in such system for long durations and leads to failure of the mission. In this paper, an effort has been made …
Published in Journal of Experimental & Applied Mechanics · Vol. 14, Issue 4, 2023 Read article
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A NUMERICAL SIMULATION OF OPTICAL RECEIVER PERFORMANCE OF WDM SIGNALS IN A PON
Abstract: This work presents MATLAB 7.9 model of wavelength division multiplexed (WDM) communication system for evaluating the performance of optical receiver simulation of WDM-PON (passive optical network). This paper attempts to focus on eliminating the channel internal noise due to number of users at different noise power levels, iterations, values of BER (bit error rate) and error count within time elapsed in seconds. Optical communication systems have good speed, accuracy and …
Published in Recent Trends in Electronics Communication Systems · Vol. 1, Issue 1, 2014 · pp. 21–24 Read article
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Investigations with WDM Network using Optical Cross Connects
Abstract: AbstractOptical cross-connects are key part of the wavelength division multiplexed based optical communication networks. Accordingly, this paper is focused on the performance evaluation for the optical cross-connects. Here, WDM system for the non-return to zero with 100 GHz channel to channel spaced network has been designed. The optical link’s performance has been numerically simulated and successfully explored for the numerous key design parameters at 20 Gbps data rate. Investigations inferred …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 1–6 Read article
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Analysis of Saturation Power based on Device Structural Parameters of a 1550 nm Symmetrical MQW Semiconductor Optical Amplifier
Abstract: AbstractThis paper presents the effect of device structure parameters on the saturation power of a 1550 nm symmetrical Multi Quantum Well (MQW) Semiconductor Optical Amplifier (SOA) for a small signal amplifier gain of 30 dB. Expressions are given to assess this dependency and the results indicate that saturation power decreases with the increase of the number of wells, well thickness and length but increases with the increase of barrier thickness. …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 1, 2015 · pp. 13–18 Read article
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Performance Study of Parabolically versus Exponentially Tapered Multimode Interference Coupler
Abstract: ABSTRACT This paper shows mainly the performance study on tapered section of Multimode Interference (MMI) coupler having either parabolic or exponential taper section. The comparative study of the 1 × 2 MMI coupler with proposed structure, such as the normalized width variation, and variation of MMI length are investigated by the 2D finite difference beam propagation method (BPM). We have found that exponential tapered MMI coupler has advantageous compared to …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 8–17 Read article
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Implementation of Terahertz Communication Link
Abstract: Abstract: With the unending augmentation in the number of mobile-related devices and the prerequisite for higher data rates anywhere, at any point, higher frequency bands are being considered for communications. As wave technology moves from searching the business game plans, and induced by the confined bandwidth, the terahertz antenna (THz) band is envisioned as the other lines for communications. Concerning vehicular systems, communications are at much higher frequencies and, in …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 6, Issue 3, 2019 · pp. 5–11 Read article
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Numerical Analysis and Comparison of Various Cross Sections of Heat Pipes in Heat Exchanger
Abstract: The present work describes about numerical analysis of heat pipe with different cross sections such as L-shape, U-shape, wave and spring configurations. The effect of various configurations of heat pipe plate exchanger are examined by considering temperatures, velocities, pressure depressions. The numerical values of Reynolds number, Nusselt number, heat transfer were calculated at different velocities. The outcome of numerical analysis found that it influences fluid flow and pressure depression. Hence, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 8, 2023 · pp. 74–81 Read article
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A New Nine Level Hybrid Multilevel Inverter
Abstract: Multilevel inverters (MLI’s) have been used widely for high power and medium power DC-AC conversion. Researchers are working to reduce total effective cost and enhance the working efficiency of the multilevel inverter. This paper presents a new multilevel hybrid inverter which utilizes eight active powers electronics switches along with asymmetric DC voltage source configuration to synthesize 9-level waveform and produces lower total harmonic distortion (THD) profile comparisons to present typical …
Published in Trends in Electrical Engineering · Vol. 6, Issue 1, 2016 · pp. 17–25 Read article
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Analysis of Flow around Conical, Ogive Nose Cones in Hypersonic Space Shuttle
Abstract: Hypersonic flow is a high Mach number regime used to distinguish flow fields, phenomena and problems appearing at flight speed far greater than the speed of sound. In high speed flows shock waves are formed during the flow. High speed flow have high energy level, thus dissipate large amount of heat, resulting in high temperatures, which may even burn the surface. The nose cone should be built with an outer …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 4, Issue 1, 2015 · pp. 1–7 Read article
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Analysis of Sound Transmission Loss in Hybrid Mufflers for Automotive Applications
Abstract: An exhaust system's noise level can be reduced with the use of a muffler. There is general recognition that baffled exhaust mufflers reduce noise emissions and increase the loss of sound transmission. The reduction of sound transmission can be further achieved by inserting sound-absorbing materials inside the muffler. Exhaust muffler systems with strategically positioned baffles have been shown to effectively reduce noise emissions, thereby improving acoustic performance. Baffles divert and …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 314–322 Read article
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Stationary Wavelet and Recursive Least Square Filtering Based Fetal ECG Data Extraction from Composite Abdominal Signal
Abstract: This paper introduces a fast methodology for fetal ECG extraction based on stationary wavelet and noise canceler adaptive filter with the recursive least square filter. Firstly, signals are preprocessed by moving averaging filter for removing baseline wander. The stationary wavelet and the recursive least square filter is applied on preprocessed signal that effectively separates the maternal ECG and extracts fetal ECG (fECG) from the abdominal ECG. Finally, fetal ECG(fECG) is …
Published in Current Trends in Signal Processing · Vol. 7, Issue 2, 2017 · pp. 46–58 Read article
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Importance and Need of Solar Photovoltaic Technology and Factors Affecting Efficiency
Abstract: Renewable energy is also called Green Energy. These energies are not exhausting and are constantly renewed. Renewal is very effective and necessary in the current situation, because as the number of people and technology increases, the demand for energy also increases. The use of solar energy research to reduce the energy crisis, protect the environment and ensure the most important economic development. Many factors affect its efficiency namely solar radiation, …
Published in Journal of Thermal Engineering and Applications · Vol. 8, Issue 3, 2021 · pp. 42–46 Read article
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Effect of Partial Ground Plane on the Microstrip Patch Antenna Performance for Wireless Sensor Networks
Abstract: Wireless sensor networks have a number of tiny nodes. Each node has the ability to communicate with its neighbors. The communication range depends on the type of antenna used. This paper analyzes the performance of microstrip patch antenna which suppresses the surface waves from the edges of the ground-plane of the substrate. The microstrip patch antenna is designed using a substrate of dielectric constant εr = 2.2 and loss tangent …
Published in Journal of Electronic Design Technology · Vol. 4, Issue 3, 2013 · pp. 5–9 Read article
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Effect of Throughflow on the Onset of Electro-Thermo Convection in a Micropolar Fluid with Maxwell-Cattaneo Law
Abstract: AbstractThe effect of throughflow on the onset of Electro-thermo convection in a micropolar fluid with Maxwell-Cattaneo law is studied using the linear theory. The eigenvalue is obtained for free-free, rigid-rigid and rigid-free velocity boundary combinations with isothermal and adiabatic on the spin-vanishing boundaries using galerkin technique. The influence of Peclet number, Electric Rayleigh number and various micropolar fluid parameters on the onset of convection has been analyzed. It is found …
Published in Recent Trends in Fluid Mechanics · Vol. 5, Issue 1, 2018 · pp. 1–17 Read article
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RFID Technology and its Application: A Vital Impact on Digital Era
Abstract: In the recent time, number of technologies is emerging from many field areas. RFID is main technology for tracking of objects for security purpose in daily life. In digital era, RFID technology transmits the identity of an objects or person wirelessly, using radio waves. Moves from obscure, RFID technology is an important aspect for digital era. By this technology, we can identify an object, automatically with the help of tag …
Published in Journal of Software Engineering Tools & Technology Trends · Vol. 7, Issue 1, 2020 · pp. 25–31 Read article
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An Efficient General Distributed Parameter Approach to the Line Transient Analysis using Interpolating Function
Abstract: This paper presents an efficient technique for the time-domain determination of the electromagnetic transients along general transmission lines. The lines can be uniform or nonuniform. The technique is also applicable to line models incorporating dependent sources, such as the distributed voltage-dependent current sources usually adopted for simulating the line corona. The suggested approach is based on the concept of the interpolating functions for the numerical solution of just two simultaneous …
Published in Trends in Electrical Engineering · Vol. 3, Issue 3, 2013 · pp. 1–21 Read article
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A Study on The Optimization of Culture Conditions using NPK, A Commercial Fertilizer for Increase in the Biomass of Microalgae, Scenedesmus Bujigatus
Abstract: Algal biomass is rich in all the required nutrients for human body and acts as food as well as medicine in the treatment of a number of therapeutic and chemo preventive diseases. Algae are capable of enhancing nutrient contents of the conventional human food. This may be assigned to their healthy and balanced chemical composition. The current study aims to investigate the light absorption characteristics of the microalgae, Scenedesmus bujigatus …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 1, Issue 1, 2011 · pp. 1–3 Read article
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Hypersonic Analysis of Mu Space Engineering Spacecraft (Muses-C) Re-Entry Capsule
Abstract: During the most recent decade, a quick development of learning in the field of reemergence and planetary passage has brought about numerous critical advances helpful to the understudies, specialists and researchers. The issue related with space flight, interplanetary travel or satellite circle is the physical recuperation or survival of the vehicle and its payload (faculty, instruments, etc.) on the earth surface or planetary surface. For atmospheric planets, the issue includes …
Published in Journal of Aerospace Engineering & Technology · Vol. 9, Issue 2, 2019 · pp. 1–19 Read article
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Light Fidelity: The New Wireless Communication Technology
Abstract: Light Fidelity (Li-Fi) is the latest 5G technology in wireless communication. It is currently becoming more popular as it overcomes the demerits of Wi-Fi and is more energy-efficient. The Wi-Fi radio frequency range is insufficient as the number of users is increasing day by day. To meet this growing demand, the visible light frequency band is used in Li-fi. It makes use of LED (light emitting diode) lights in order …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 1, Issue 1, 2014 · pp. 20–23 Read article
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Solitary Identification and Analysis of Considerate Nutritional Consumption and Identifying Malnutrition
Abstract: The food supply chain is in danger from various factors, including climate threats, such as heat waves, floods, droughts, and other extreme occurrences such as intensive livestock farming, demand for animal protein, practices for antimicrobial resistance and various other factors leading to serious food shortages and an increase in food prices. Malnutrition is a major issue, with an estimated 663 million individuals affected. Poor nutrition is a serious problem that …
Published in Journal of Artificial Intelligence Research & Advances · Vol. 10, Issue 2, 2023 · pp. 46–62 Read article