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125 articles for “path loss”
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Pathloss and Coverage Analysis of FM Signals for Terrestrial Communication Design over Akure, Nigeria
Abstract: Accurate analysis of Free Space Loss (FSL) of electromagnetic radiations plays significant roles in the design and planning of terrestrial communication system at radio wave and microwave frequencies. Hence, it remains important to continuously evaluate the dependence of radio waves signal strength on the properties of the propagating medium. This work employed drive test technique and free space loss analysis of some Frequency-Modulated (FM) channels in Akure, Ondo State, Nigeria, …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 8–21 Read article
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Performance Evaluation of Integrated UMTS-WLAN under Pervasive Environment
Abstract: The integration of wireless access networks for next generation networks provides seamless internet connectivity anywhere at any time to the mobile users. The Wireless Local Area (WLAN) provides high data rate at low cost, but for limited coverage area and Universal Mobile Telecommunication System (UMTS) is capable of providing the global coverage with in low cost. Integrated UMTS-WLAN network can be capable of providing ubiquitous connectivity and high data rate …
Published in Current Trends in Signal Processing · Vol. 3, Issue 3, 2013 · pp. 24–32 Read article
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Analysis of Losses in Geostationary Intersatellite Optical Wireless Communication Links
Abstract: The effective method to create a link between satellites is inter-satellite communication. Data is transmitted from one side to the other via a laser in this groundbreaking method. Optical networks, which offer continuous data transport over vast distances, are networks with high bandwidth efficiency. Inter-satellite optical wireless communication (Is-OWC) is a common method to transfer high-speed data between various satellites in free space. Is-OWC networks have undoubtedly innovated satellite communications …
Published in International Journal of Satellite Remote Sensing · Vol. 2, Issue 2, 2024 · pp. 1–18 Read article
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Li-Fi’s Marketplace in the Future
Abstract: In this work, we are describing our project on the Li-Fi system. The full form of Li-Fi is “light fidelity”. It is the forerunner of Wi-Fi. Li-Fi is a type of data transmission technology that will be used in the future because of its causes and benefits. Wi-Fi and Li-Fi are not similar to each other. There are many differences between them in every aspect. In terms of speed, Li-Fi …
Published in Journal of Communication Engineering & Systems · Vol. 12, Issue 3, 2022 · pp. 1–5 Read article
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Simulation of Different Propagation Models for WiMAX channel under Different Environments
Abstract: Today the Worldwide Interoperability of Microwave Access (WiMAX) technology is gaining popularity and gaining increasing acceptance as a Broadband Wireless Access (BWA) system. It is a IEEE 802.16 standard wireless communication technology that provides high speed data over a wide area. It is a point-to-point technology for using a multi-point wireless network. It has potential success in its line of sight (LOS) and non-linear (NLOS) operating conditions under the frequency …
Published in Recent Trends in Electronics Communication Systems · Vol. 8, Issue 2, 2021 · pp. 35–45 Read article
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Comparison of Ultra Wide Band Indoor Multipath IEEE 802.15.3 Channel Model
Abstract: ABSTRACT A very large bandwidth of frequency (3.1–10.6 GHz) has been allocated to UWB systems. A single-band UWB signal propagates differently in the lower and upper bands of the spectrum due to the size of its bandwidth. The lower part of the signal can be obstructed more easily and the man-made interferences are not homogeneously distributed over the whole spectrum. The first experimental results obtained for a UWB channel show …
Published in Journal of Communication Engineering & Systems · Vol. 2, Issue 3, 2012 · pp. 20–25 Read article
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A review on the effects of Indian medicinal spices on age related molecular and cellular pathways in light of geriatric muscle loss
Abstract: Biological aging is an enigmatic and progressive process, which can be affected by various mechanisms - genetic alteration, deregulated nutrient sensing, proteostasis, cellular degeneration and stem cell dysfunctioning. Indian spices are an underexplored repository of phytoactives with a medicinal potential. Especially spices like cumin (Cuminum-cyminum) and fennel seeds (Foeniculum vulgare) are central to the Indian diet as well as a part of numerous traditional recipes and formulations with medicinal implications. …
Published in Research & Reviews : Journal of Food Science & Technology · Vol. 12, Issue 3, 2024 · pp. 1–10 Read article
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Pathways of Periodontal Disease and Alveolar Bone Loss in Type II Diabetes
Abstract: or poorly-controlled type II diabetes often exhibits a high morbidity of periodontal pathology. Food impaction in defective restorations or open proximal contacts often leads to infection, carious lesions, periodontitis, alveolar bone loss and often tooth loss. An iatrogenic injury occurs when restorations are defective, fractures, or have open proximal contacts and are not planned to be repaired or replaced. In addition to having poor therapeutic outcomes, defective restorations or open …
Published in Research and Reviews: A Journal of Dentistry · Vol. 4, Issue 3, 2013 · pp. 28–35 Read article
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Comparison Analysis of Routing Protocols with Variation in Node Density for Rayleigh Fading
Abstract: AbstractOne of the most overlooked factors in evaluating the performance of ad-hoc routing protocols is the variation in the signal strength known as fading. In wireless network, MANET suffers a huge loss in performance due to obstacle between transmission and variation in signal strength at receiver. Many routing protocols are proposed based on which neglect the effect of fading and path loss. Main objective of this paper is to find …
Published in Journal of Software Engineering Tools & Technology Trends · Vol. 4, Issue 2, 2017 · pp. 1–5 Read article
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Review on Optimization of Wireless Optical Communication System
Abstract: AbstractWireless optical communication [WOC] is a recently emerging field, which gives solution for the drawbacks of radio and microwave communication issues. Optical fiber communication has already developed and accepted by its high performance such as high data capacity, speed etc. But WOC experiences atmospheric turbulence problems and distant dependent path loss. And scintillation and aerosol particles (rain, haze, fog and drizzle) bring this major challenge for the WOC system by …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 2, 2014 · pp. 9–19 Read article
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Human Tracking and Positioning in Semi Outdoor Area using Ultra Sound Positioning System
Abstract: AbstractIn this thesis, we introduced the indoor and semi outdoor location determination problem. The localization accuracy metrics are the mean error per pixel and the room averaged mean error. We have tried to assess the accuracy of the algorithm, as the location and the number of BSs varies, path loss exponent n value changes. By measuring RSS and mean error of our proposed system, it is concluded that the number …
Published in Journal of Communication Engineering & Systems · Vol. 6, Issue 3, 2016 · pp. 23–31 Read article
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Performance Analysis of DWT Based OFDM System using SRRC Filter in Mobile Wimax over Fading Environment
Abstract: AbstractWavelets amid its capability to provide simultaneous information in both time and frequency domain, along with minimization of interference and improved bandwidth efficiency, is considered broadly as an efficient approach to replace fast Fourier transform (FFT) in the conventional orthogonal frequency division multiplexing (OFDM) systems. Efficient filter pulses are employed spectrally in such systems in order to mitigate the effect of inter-symbol interference (ISI) as well as satisfy the bandwidth …
Published in Journal of Communication Engineering & Systems · Vol. 7, Issue 1, 2017 · pp. 1–10 Read article
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Impact of Fading in On Demand Routing Protocol of MANET
Abstract: AbstractFading is a major impairment while transmitting a signal in wireless communication channel. It is caused by multipath propagation. That is signals from different paths can constructively or destructively interfere with each other. Thus, it becomes very necessary to reduce this effect, to transmit the signal effectively to the receiver. Many routing protocols are proposed based on which neglect the effect of fading and path loss. Main objective of this …
Published in Journal of Software Engineering Tools & Technology Trends · Vol. 4, Issue 2, 2017 · pp. 6–10 Read article
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Relative Performance of BPSK and BFSK in Underground Mine Communication Considering Multipath and Bending Losses
Abstract: AbstractWireless/Mobile signals get strongly attenuated deep inside a building/tunnel/mine. In order to study the performance parameters, underground communication channel needs to be modeled. As a first step here we have practically tried two digital modulation methods BPSK and BFSK for underground communication. Wireless link was able to support data signals. Various measurements were made up to a depth of 30 m inside the mine. Beyond 30 m as more than …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 2, 2014 · pp. 12–17 Read article
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Noise Sources, Exposure, health effects and Control in Iron & Steel Foundry
Abstract: Foundries are one of the oldest industries and the most basic of all metallurgical processes, with two main procedures performed in a foundry: molding and metal casting. Workers are exposed to a wide range of hazardous compounds in the workplace due to the variety of materials and procedures performed in this industry, which can lead to chronic exposure to hazardous substances (physical and chemical). Noise is a major physical hazard …
Published in Journal of Industrial Safety Engineering · Vol. 8, Issue 2, 2021 · pp. 20–28 Read article
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A Survey of Various Route Selection Strategies for Mobile Ad-Hoc Networks
Abstract: Mobile Ad-hoc Networks (MANETs) have a dynamic topology due to the mobile nature of portable devices. Because of high mobility of mobile devices in MANETs, a frequent path failure occurs when a node changes its position in the network. Due to path failure, packet loss occurs in the network. Packet loss is responsible for information lost and retransmission in the network. To minimize packet loss in the network, there should …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 2, Issue 1, 2015 · pp. 17–23 Read article
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Underbalanced Drilling and Its Advancements: An Overview
Abstract: Ever increasing global energy demand associated with depletion of conventional hydrocarbon resources drives exploration and production (E&P) industry to invent advanced new technologies in frontier areas of drilling, production and reservoir engineering to enhance hydrocarbon production from unconventional resources or depleted reservoirs. Demand to produce from a low pressure marginal reservoir and the discoveries of naturally fractured reservoirs lead to the development of new drilling techniques like underbalanced drilling along …
Published in Journal of Petroleum Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 37–51 Read article
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Prevalence and Various Risk Factors of Musculoskeletal Pain among Physiotherapists: A Survey Study
Abstract: The relationship between physical activity (forceful, repetitive movements with awkward postures) and MSDs is more complicated than just cause and effect. Most studies on the prevalence of work related MSDs (WMSDs) and their association with occupational tasks have been performed in the manufacturing sector, as outlined in comprehensive literature reviews by the National institute for occupational safety and health (NIOSH). Physical activity may cause injury. Some epidemiologic studies have used …
Published in Research and Reviews: A Journal of Neuroscience · Vol. 5, Issue 3, 2015 · pp. 14–20 Read article
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BUCKLING ANALYSIS OF COMPOSITE CYLINDRICAL SHELL STRUCTURE USING FINITE ELEMENT ANALYSIS
Abstract: When designing cylindrical shells one should consider not only the strength problem in service, but also the buckling problem. Cylindrical shells such as thin-walled structures are susceptible to buckling when subjected to static and dynamic stresses. The vessels are exposed to dynamic sea conditions depending on their usage. The functional failure of a pressurized composite vessel or a composite pipe in the form of leakage or weeping of the contained …
Published in Journal of Polymer & Composites · Vol. 7, Issue 2, 2019 · pp. 32–36 Read article
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Hybrid Techniques in Mango Leaf Disease Identification: Evaluating Neural Networks and Support Vector Machines
Abstract: Mango leaf diseases pose a significant threat to mango production, impacting both yield and fruit quality. Early and accurate detection of these diseases is crucial for effective management. This paper evaluates the use of hybrid techniques, specifically the integration of neural networks (NNs) and support vector machines (SVM), in the identification and classification of mango leaf diseases. NN excel in extracting complex features from images, while SVMs are robust classifiers, …
Published in Trends in Opto-electro & Optical Communication · Vol. 14, Issue 3, 2024 · pp. 19–27 Read article