Search
101 articles for “transmittance”
-
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
-
Use of Microwaves in Wireless Charging of Mobile Phone
Abstract: The foremost objective of this present scheme is to make the recharging of the mobile phones independent of their manufacturer and battery make. In this paper a new scheme has been made so as to make the recharging of the mobile phones is done by design as you talk in your mobile phone. This is done by use of microwaves. The microwave signal is transmitted from the transmitter along with …
Published in Journal of Microelectronics and Solid State Devices · Vol. 2, Issue 2, 2015 · pp. 21–25 Read article
-
GSM Based Integrated Control System for Optimal Hazard Management
Abstract: It is no doubt that the lack of adequate control measures to control hazards such as fire outbreaks, flooding and intrusion have continued to undermine production and development in the country and had rendered many people homeless due to the negative effects imposed by these hazards. This work developed a system that provides smart alerts and control responses to emergencies such as fire outbreaks, gas leakage, flooding and intrusion in …
Published in Journal of Microelectronics and Solid State Devices · Vol. 9, Issue 2, 2022 · pp. 29–41 Read article
-
Poly Vinyl Alcohol/Kaolinite Clay/Grafted Cellulosic Fibre Based Hybrid Composite Films: Physical, Mechanical, Optical and Biodegdrability Studies
Abstract: In this study, physical, mechanical, optical, morphological and biodegdrability properties of poly vinyl alcohol (PVA)/kaolinite clay (KC)/grafted barley husk (GBH) based hybrid composite films were prepared by solution casting method. Barley husk was grafted with oleic acid using graft copolymerization method. The hybrid composite films were characterized by FTIR and SEM. Based on the findings from this work, water uptake of the composite films increased with increase in the amount …
Published in Journal of Polymer & Composites · Vol. 5, Issue 3, 2017 · pp. 41–52 Read article
-
Optical, Thermal Properties of Cadmium Chloride Reinforced PVA:PVP Blend Films
Abstract: In this study, pure polymer blend film (PVA:PVP) and salt (CdCl2.H2O) reinforced polymer blend films were prepared at different weight ratios (10, 20, 30) wt% using the casting method. The optical and thermal properties of all polymer blend films were studied.The transmittance and absorbance spectra were recorded within the wavelength range (190-1100) nm. The effect of salt weight ratio on the energy gap of salt (CdCl2.H2O) reinforced polymer blend films …
Published in Journal of Polymer & Composites · Vol. 8, Issue 1, 2020 · pp. 46–52 Read article
-
Studies on Mechanical, Optical, Barrier Properties and Characterization of LDPE-PLA Blend Films with Micro Clay
Abstract: Low density poly ethylene (LDPE) and Poly lactic acid (PLA) in the ratio of 70:30 wt% were blended along with ethylene glycidyl meth acrylate (EGMA) as compatibilizer (2.5%), benzophenone as photodegradable additive (1%) and microclay (1,3,5%) as filler. Blending took place in a twin-screw extruder and then the resulting blend was processed into a film using blown film extrusion. Mechanical, optical, barrier and degradative properties of film were tested as …
Published in Journal of Polymer & Composites · Vol. 9, Issue 3, 2021 · pp. 56–66 Read article
-
Performance Analysis of Efficiency of Solar Photovoltaic Module on Dust Deposition
Abstract: The rise in demand for energy and the continuous decrease in existing sources of fossil, have push mankind to explore new technologies for improving utilization of green energy. Solar energy is one of the promising sources to meet the increasing demand of electricity. There are factors that affect the performance of Photovoltaic (PV) modules. One such is dust deposition. The solar PV modules polluted by dust particles for a period …
Published in Journal of Power Electronics and Power Systems · Vol. 12, Issue 1, 2022 · pp. 22–30 Read article
-
Synthesis and Characterization of In2S3 Nanoflake Thin Film for Photosensor Applications
Abstract: Indium sulphide (In2S3) thin films in the form of nanoflakes are synthesized by using chemical vapour deposition method on glass substrate with the intension to test its photosensor applications. These as deposited nanoflake thin films are characterized for physicochemical properties using X-ray diffraction (XRD) pattern, energy dispersive X-ray (EDAX) analysis,scanning electron microscopy (SEM) while optoelectronic properties were studied using optical and electrical characteristics obtained through UV-Vis transmission spectroscopy and I-V …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 4, Issue 3, 2017 · pp. 21–26 Read article
-
Effect of Sol-Gel Coating on Fire Performance and Optical Properties of Wood Panels
Abstract: Investigates the impact of sol-gel coating on the fire performance and optical properties of wood panels.SEM, EDX, and infrared spectroscopy with the Fourier transform were used to characterize the sol-gel coating, which was put on to the wood panels using a dip-coating technique. The fire performance of the coated and uncoated wood panels was evaluated by measuring the ignition time, flame spread rate, and total heat release rate. The optical …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 1, 2023 · pp. 20–24 Read article
-
Design of a Raspberry-pi based Wireless Adapter for Projector
Abstract: Wired world is transforming to wireless and this transformation generates necessity to innovate and create the wireless means. This paper proposes a wireless adapter to convert the existing wired projector into a wireless projector without major changes to projector hardware. Based on a development of the wireless adapter, a new feature of wireless projection is possible by transferring the information without any physical medium by establishing a wireless network between …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 1, 2015 · pp. 9–15 Read article
-
Comparison & Improvement in Channel Estimation Techniques for Next Generation Network Using mm wave OFDM Channel
Abstract: This paper develops schemes for orthogonal matching pursuit (OMP), bayesian Cramer Rao Bound & ORACLE-LS channel estimation technique in milli-meter wave (mm- Wave) multiple-input-multiple-output (MIMO) systems that exploit the spatial sparsity inherent in channels. In simulation results shows comparison between ORACLE LS & orthogonal matching pursuit (OMP) on the basis of NMSE v/s SNR comparison between orthogonal matching pursuit OMP, MSBL, and TSBL-based & various channel estimation techniques for the …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 8, Issue 2, 2021 · pp. 1–6 Read article
-
A Visible Light-based Indoor Navigation and Localization Solution for Visually Criticized Users
Abstract: Visible Light Communication is seen as a promising option for 5G communication because to its characteristics such as operating in a non-licensed frequency spectrum, offering high bandwidth, using minimal power, and being immune to electromagnetic interference. This property allows light waves to transmit data faster and convey more information, making VLC a promising solution for providing universal electronic navigation assistance to visually challenged individuals. VLC utilizes the visible light spectrum …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 2, 2023 · pp. 22–34 Read article
-
Channel Prediction and Estimation Based on Machine and Deep Learning Techniques: A Review
Abstract: Channel prediction estimation in the high- speed mobile environment is a hot issue for 3D massive multiple input multiple output (MIMO) millimeter-wave (mmWave) system. In this environment, the channel has fast time-varying and non-stationary characteristics. And its time-domain correlation coefficient is a time- varying parameter, which makes it difficult for traditional channel estimation methods to capture the channel variations over time and achieve ideal channel estimation performance. A known signal, …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 3, 2023 · pp. 13–17 Read article
-
Linearity Analysis of Traditional Single and Double Balanced Down Conversion Mixers
Abstract: More sophisticated designs of communicating devices are required with tremendous scaling in MOS. Mixers play a vital role in all radio transmitters and receivers. To improve the sensitivity of the receivers, the low noise amplifiers are designed with very high gain. Higher gain of amplifier saturates the preceding sections and forces them to operate in the nonlinear region. MOS based Single Balanced and Double Balanced mixers are the most common …
Published in Journal of VLSI Design Tools and Technology · Vol. 6, Issue 3, 2016 · pp. 22–27 Read article
-
Design of Home Automation System Using Arduino and Mobile Application
Abstract: This study provides a moderate, highly customizable home control and environmental monitoring system. It makes the most of an encapsulated micro – web page in the Arduino Mega 2560 microcontroller, trying to access and commanding devices, as well as health monitoring access but moreover control devices such as mobile phones. Those certain computers can sometimes be organised via a web - based application or a Bluetooth Android-based smart smartphone. Machines …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 1, 2022 · pp. 8–13 Read article
-
Study of the Effect of Saline Solution on the Extraction of the Tamarind Seed Extracts Active Coagulant for Textile Wastewater Treatment
Abstract: The use of synthetic coagulants is not regarded as suitable due to health and economic considerations. A new coagulant obtained through polymerization of tamarind seed extract has been characterized in the removal of dangerous dye pollutants. The present study was aimed to investigate the effects of tamarind seed extract as coagulant in treatment of textile wastewater. The coagulant prepared was employed for the removal of sludge at the different doses. …
Published in Journal of Water Resource Engineering and Management · Vol. 1, Issue 3, 2014 · pp. 35–39 Read article
-
Study of the Effect of Saline Solution on the Extraction of the Acacia Gum Active Coagulant for Textile Wastewater Treatment
Abstract: The use of synthetic coagulants is not regarded as suitable due to health and economic considerations. A new coagulant obtained through polymerization of acacia gum extract has been characterized in the removal of dangerous dye pollutants. The present study was aimed to investigate the effects of acacia gum as coagulant in treatment of textile wastewater. The coagulant prepared was employed for the removal of sludge at the different doses. The …
Published in Recent Trends in Civil Engineering & Technology · Vol. 4, Issue 3, 2014 · pp. 20–24 Read article
-
A Review on the Light Transmission Behaviour of Concrete Using Plexiglass Fibres
Abstract: The transparent behaviour of concrete can be improved using optical fibres which enable the transmission of light into the concrete, by decreasing the energy consumption and carbon footprint, to provide a sustainable living environment. To investigate the effect of the usage of plastic optical fibres, different blocks are cast and tested for light transmission properties. The rates of usage of plastic optical fibres are varied under the same loading conditions …
Published in Recent Trends in Civil Engineering & Technology · Vol. 12, Issue 2, 2022 · pp. 6–9 Read article
-
Bluetooth-Based Remote-Controlled Home Automation System for 1 Load
Abstract: The evolution of wireless technology has catalyzed the integration of wireless based automation into various aspects of human life, notably impacting home environments. Home automation, characterized by the incorporation of technology facilitating the automatic control of devices and systems, has emerged as a significant contributor to modern living standards. This technological paradigm shift not only enhances the convenience and comfort of everyday life for the general populace but also serves …
Published in Recent Trends in Electronics Communication Systems · Vol. 10, Issue 2, 2023 · pp. 43–48 Read article
-
Smart Water Distribution System Using PLC And HMI
Abstract: The increasing population and thus the wide expansion of urban residential areas have increased the need of proper sharing of water. This distribution of water in every house within different areas needs the control and monitoring for preventing the wastage of water and the water theft practices. Different technologies have been studied to distribute/supply the water to each and every house of residential areas. The main aim of this project …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 3, 2020 · pp. 5–9 Read article