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443 articles for “K-band”
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Adaptive Routing Protocol to Optimize the Quality of Service of MANET Using Neural Network
Abstract: A MANET is a group of mobile nodes that create a temporary network without relying on centralized administration or standard supporting devices, often functioning as a conventional network. These dynamic environments present significant challenges for traditional routing and switching protocols, particularly in delivering Quality of Service (QoS) benchmarks such as bandwidth, latency, packet delivery ratio, and robustness. This study proposes an Adaptive Routing Protocol (ARP) leveraging Neural Network (NN) techniques …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 12, Issue 3, 2025 · pp. 01–09 Read article
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Structural, Optical, Surface, and Gas-Sensing Properties of rGO/Sn1–xZnxO₂ Nanocomposites
Abstract: rGO/Sn₁–ₓZnₓO₂ nanocomposites with x = 0.00–0.75 were synthesized by sol–gel auto-combustion followed by wet impregnation with reduced graphene oxide. The adopted synthesis route enabled homogeneous Zn incorporation into the SnO₂ matrix and uniform distribution of rGO, leading to improved structural integrity and interfacial contact between the two components. XRD confirmed a dominant tetragonal cassiterite SnO₂ structure, while FTIR, FESEM, EDS, UV–visible, and BET analyses verified oxide–rGO coupling, Zn-dependent structural modification, …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 · pp. 429–452 Read article
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ED-SS based Cognitive Radio (CR) over Rayleigh Fading Channel and the Performance of Optimized Cooperative Spectrum Sensing Technique for Modern Wireless Communications
Abstract: Cognitive Radio (CR) has indeed been shown to be a superior way to address the issue of spectrum scarcity in which every wireless system occupies the limited bandwidth spectrum (LBS) allotting to the licensed users. Spectrum holes, which are approximated using spectrum sensing, occur when this LBS is empty in a certain location at a specific moment (SS). The SS is the main objective of CR and various SS techniques …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 1–12 Read article
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Authentication Authorization and Auditing for Regenerating Encrypted Information in Cloud Computing
Abstract: AbstractTo secure an outsourced data in cloud storage against corruptions and adding fault tolerance to cloud storage together with data integrity checking and failure reparation becomes critical. Nowadays regenerating codes have been gained popularity due to the lower repair bandwidth while providing error a tolerance. Existing remote checking methods for regenerating-coded data only provide private auditing, requiring data owners to always stay online and handle auditing, as well as repairing …
Published in Journal of Computer Technology & Applications · Vol. 7, Issue 1, 2016 · pp. 7–11 Read article
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Biquid Filter Based Equalization Through Plastic Optical Fiber
Abstract: Plastic Optical Fiber (POF) is increasingly recognized for its advantages in high-speed data transmission, particularly over short distances. Unlike traditional glass optical fiber, POF uses a polymethyl methacrylate (PMMA) core with a fluorinated polymer cladding, resulting in a larger core diameter that simplifies alignment and splicing. Recent advancements include the development of graded-index POF (GI-POF), where the core's refractive index gradually decreases from the center outward, minimizing modal dispersion and …
Published in Journal of Microelectronics and Solid State Devices · Vol. 11, Issue 2, 2024 Read article
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Spectral Mapping and Tracking Error of MBOC signal and Wavelet based GNSS receiver
Abstract: This research paper delves into the historical evolution and contemporary state of the art in navigation technologies, emphasizing the paramount importance of reliable positioning systems. Tracing the journey from ancient primitive methods to the present-day Global Navigation Satellite Systems (GNSS), with a focus on the Global Positioning System (GPS), the paper explores the diverse instruments and methods developed by civilizations throughout history to determine location and navigate effectively. The main …
Published in Current Trends in Signal Processing · Vol. 16, Issue 1, 2026 · pp. 50–65 Read article
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GaN-based Double Gate MOSFET (DG-MOSFET)
Abstract: AbstractGaN is auspicious for high-power, high-temperature devices because of its large bandgap, and high saturation velocity compared with Si. Gallium nitride (GaN) based devices are expected to play an important role to develop the next-generation devices. The performance of GaN-based double gate (DG) MOSFETs have been explored with gate length (Lg) 10.6 nm. The ON-current (ION) and OFF-current (IOFF) are found to be 8.11´10–3 and 6.38605´10–9A/µm respectively, respectively with an …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 3, 2018 · pp. 24–28 Read article
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Synthesis and Photoluminescence Dynamics of Europium (III) and Terbium (III) Co-doped of GdSrAl3O7 Color-Tunable Nanophosphors
Abstract: A series of Europium (III) and Terbium (III) co-doped GdSrAl3O7 color-tunable nanophosphors were synthesized by a simplistic, streamlined and self-propagating, urea-assisted solution combustion synthesis process. The structural and luminescence characteristics of synthesized Eu3+/Tb3+ co-doped Gadolinium Strontium Aluminate nanocrystalline phosphors were validated using powder X- ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X- ray analysis (EDAX), and photoluminescence spectra studies. The morphological studies revealed that …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 1069–1082 Read article
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Optical Characteristics of Amorphous Se-Ge-Ag Thin Films
Abstract: AbstractDetailed studies on impurity dependence of the optical structural properties have been carried out on Se-Ge-Ag thin film samples prepared by thermal evaporation technique. The effect of the addition of varying amounts of silver in concentrations from 5 to 15 molar percent to Se-Ge system were analyzed systematically under the room temperature. The optical transmission and reflection spectra of these films were measured in the range of 300–900 nm. The …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 3, 2016 · pp. 33–38 Read article
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Performance Analysis of Free Space Optics with Optsim Simulator
Abstract: ABSTRACT Free space optics (FSO) is an expanding technology that is gaining acceptance in an increasing number of sectors of science and industry in tropical region, such as Malaysia. It provides an effective line of sight, wireless and high bandwidth communication between two points. However, FSO does have an uncontrolled drawback which is highly sensitive to atmospheric phenomena such as environmental temperature, rain, fog, smoke, and haze. Thus, the impact …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 1, 2012 · pp. 28–34 Read article
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Analysis of FSO Communication System under different weather conditions by incorporating Pre and Post Optical Amplifier
Abstract: AbstractFSO Communication is currently needed for the modern era because of high channel capacity and bandwidth. FSO is a line of sight; license free and low-cost technology which makes it preferred over radio frequency communication and other wireless technologies. In this paper, the first part tells about the introduction of the FSO system, its advantages, disadvantages and applications. The second part will discuss the atmospheric attenuation caused by different weather …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 16–24 Read article
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The Impact of AI-Driven Real-Time Feedback Systems on Students’ Self-Regulated Learning and Academic Persistence in Secondary Schools, Nigeria
Abstract: Self-regulated learning (SRL) is essential for secondary school students to achieve academic success and lifelong learning competencies, particularly in contexts requiring greater learner autonomy. This expository article examines the potential of Artificial Intelligence (AI)-driven real-time feedback systems to support SRL processes—planning (forethought), monitoring (performance/control), and reflection—within Nigerian secondary education. Grounded in Zimmerman’s cyclical SRL model and Bandura’s Social Cognitive Theory, the paper conceptualises AI tools (e.g., intelligent tutoring systems, learning …
Published in Journal of Advancements in Library Sciences · Vol. 13, Issue 2, 2026 Read article
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Time Multiplexed Binary Offset Carrier (TMBOC) Transmitter with Polarimetric Interferometric Synthetic Aperture Radar (Pol-InSAR)
Abstract: This paper provides insights into Time Multiplexed Binary Offset Carrier (TMBOC), a modulation technique employed in satellite navigation systems, specifically designed for GPS L1C. TMBOC improves signal correlation properties by time-multiplexing Binary Offset Carrier (BOC) (1, 1) and (6, 1). The text discusses various TMBOC models, including spectral representations and power distributions. Performance analysis reveals the potential of TMBOC signals in achieving superior tracking accuracy and interference resistance compared to …
Published in International Journal of Satellite Remote Sensing · Vol. 4, Issue 1, 2026 · pp. 34–49 Read article
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Delta Sigma Fractional N Frequency Synthesis
Abstract: Frequency synthesizers are fast becoming essential for several broadcast bands and circuits as communication technology hasimproved. To meet this need, the fractional N frequency synthesizer was created. This synthesizer has proven its supremacy as a noteworthyinnovation by permitting various improvements over comparable concepts. Only when it is combined with delta-sigma modulation is thispossible. This combi- national circuit enhances frequency resolution and noise performance. PLL-based frequency synthesis is often used toproduce …
Published in Journal of VLSI Design Tools and Technology · Vol. 13, Issue 2, 2023 · pp. 12–20 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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Complementary Metal Oxide Semiconductor Readout Integrated Circuit for Imaging Applications
Abstract: In this paper presents a novel continuous-time simultaneous-readout scheme for active imaging systems based on orthogonal modulation of photo detector signals. The superimposed-continuous-time approach presented here differs from the conventional scheduled-discrete-time scheme in that the photo detector signals are summed in a common bus concurrently and then converted to voltage levels for digitization. We illustrate that our proposed architecture may be profitable. Predominantly, in solicitations, the bandwidth necessities for a …
Published in Journal of Semiconductor Devices and Circuits · Vol. 2, Issue 2, 2015 · pp. 5–8 Read article
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Diglycidyl Ether of Bisphenol A (DGEBA) Based Epoxy Sizing Agent Induces Surface Polarity in Carbon Fibers†
Abstract: Determination of the chemical structure and composition of the sizing agent is a challenge as its concentration is low, varying in the range from ~0.5 wt.% (for polyacrylonitrile, PAN, based carbon fibers) to ~1 wt.% (for pitch-based carbon fibers). Moreover, such a piece of knowledge is vital for designing compatible polymer matrices to prepare CFRPs for diverse applications. As a result, the sizing layer that is coated on the carbon …
Published in International Journal of Crystalline Materials · Vol. 1, Issue 2, 2024 · pp. 24–34 Read article
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Heat Transfer Performance of ZnO- Ethylene Glycol- Water Nanofluid Using Thermal Lens Technique
Abstract: Nanofluids are engineered fluids used in advanced electronic systems for thermal management. Fluids with dispersed nanoparticles have exhibited remarkable thermal properties. Ethylene glycol (EG) and water mixtures are widely used in many industrial areas. This study investigates the synthesis and heat transfer performance of ZnO-EG, ZnO-water, and ZnO-EG-water nanofluids using a dual-beam thermal lens technique. ZnO is a widely used inorganic, UV-absorbing, multifunctional semiconducting material with applications in various fields …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 440–445 Read article
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Future Now: Network Architecture of 6G
Abstract: 5G networks are currently being rolled out in various parts of the globe and are expected to be done as the decade ends. However, with the continuously increasing demand for bandwidth and the need for automation, even the most advanced network architecture is expected to reach its capacity limit by 2030. The emergence of wireless technologies has led to the introduction of new infrastructure elements like High-Speed Packet Access (HSPA) …
Published in Current Trends in Signal Processing · Vol. 13, Issue 2, 2023 · pp. 18–23 Read article
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Nano-Silica Reinforced Crosslinked Biopolymer–PCM Composites for Improved Thermal Cycling Durability
Abstract: Crosslinked biopolymer–PCM composites reinforced with nano-silica were developed to enhance thermal cycling durability, leakage resistance, and structural stability for advanced thermal energy storage applications. A starch-based biopolymer was chemically crosslinked using citric acid to create a stable polymer network, while paraffin was employed as the phase-change medium and nano-silica (1–4 wt%) served as a multifunctional inorganic reinforcement. FTIR analysis confirmed successful esterification between citric acid and the polymer backbone, indicated …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 1–10 Read article