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64 articles for “Atmospheric Parameters”
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Optimization of Process Parameters for Isopropylation of Toluene over Modified Zeolite using Response Surface Methodology
Abstract: Vapor-phase isopropylation of toluene with isopropanol has been investigated in a fixed-bed flow reactor under atmospheric pressure using N2 carrier gas over Cerium modified 13X zeolite catalyst. The main product of this alkylation reaction was p-cymene followed by meta-isomer, while ortho-cymene was negligibly formed. Response surface methodology was used to study the combined effects of temperature, reactant molar ratio and space time on the conversion of toluene and selectivity of …
Published in Emerging Trends in Chemical Engineering · Vol. 1, Issue 1, 2014 · pp. 22–30 Read article
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10 Mbs Ethernet via Free Space Optic during Rainy Weather
Abstract: ABSTRACTFree space optics (FSO) is a potential solution for high bandwidth demand in temperate countries, like Malaysia and shows a great choice for last-mile problem where implementation of fiber optic cables is very limited due to deployment time and cost constraint. The control of these phenomena will allow to evaluate the system performance and then to improve their reliability. The aim of this paper is to compare the behavior of …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 1–7 Read article
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Comparison of Air Pollution Levels from Ground Monitoring Stations and Satellite Data
Abstract: Air pollution is mainly due to the release of pollutants into the atmosphere which are detrimental to the planet and human health in particular. Monitoring for the air quality parameters is important because it may lead to the adverse effects on the environment. The quantitative analysis of the air pollution spreads over the Bangalore city is carried out using two different data sources, one from ground monitoring stations and the …
Published in Journal of Remote Sensing & GIS · Vol. 12, Issue 3, 2021 · pp. 9–25 Read article
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Tropospheric Variation of Point Refractivity Gradient and Geo-climatic Factor over a Coastal Location in Tropical Nigeria
Abstract: Accurate assessment of refractivity gradient and Geo-climatic factor is crucial for maintaining reliable radio signal propagation in clear-air environments. These parameters are essential for determining the fade margin necessary to ensure a stable and effective wireless radio link, given the unstable nature of the atmosphere through which the signals travel. It is crucial to have accurate knowledge of these characteristics, particularly at microwave antenna heights of around 70 meters, in …
Published in Journal of Remote Sensing & GIS · Vol. 15, Issue 2, 2024 · pp. 28–42 Read article
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Synthesis of Biodiesel with Methanol Recovery in Reactive Distillation
Abstract: In the present study, biodiesel was synthesized from waste vegetable oil, methanol and catalyst. The present work investigates the use of reactive distillation for continuous production and separation of biodiesel with recovery of excess methanol as top product of acceptable purity. In order to determine the best conditions for biodiesel production by reactive distillation, process parameters such as molar ratio of oil to alcohol, reaction temperature, catalyst concentration (0.5–1.5 wt …
Published in Emerging Trends in Chemical Engineering · Vol. 3, Issue 1, 2016 · pp. 26–31 Read article
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Atmospheric Modeling: A Comprehensive Review of Numerical Approaches and Applications
Abstract: Atmospheric modeling plays a crucial role in understanding and predicting atmospheric processes, weather patterns, and climate variability. This review synthesizes current methodologies and applications across several types of atmospheric models, including numerical weather prediction (NWP), climate models, air quality models, and chemical transport models. We explore the intricacies of data assimilation, model evaluation, parameterization, and the importance of high-performance computing in advancing model accuracy and efficiency. Special emphasis is placed …
Published in International Journal of Atmosphere · Vol. 1, Issue 2, 2024 · pp. 16–21 Read article
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Numerical Simulation of Air Flow Field of A Gas Turbine Engine Air blast Atomizer
Abstract: One of the most crucial process that occurs before the fuel is burned in the combustion chamber is atomization. The performance of a engine will be depend mainly on the fuel mixture. Performance of the engine depends on atomization process because it breaks the bulk fuel into small droplets and injects it into the combustion chamber, in order to make this happen consequently the dimensions of most of the fuel …
Published in Journal of Polymer & Composites · Vol. 11, Issue 13, 2023 · pp. 169–180 Read article
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Perfluorinated Composites for Optical Fiber Development for Optical Communications
Abstract: Free Space Optical (FSO) communication is a new generation of high-speed technology that utilizes light as the carrier to transfer information through free space, e.g., air, outer space, and vacuum. In comparison with traditional systems of communication, FSO offers a wonderful bandwidth advantage with less cost and ease of installation. This study compares the performance of two other FSO systems using advanced polymer composites such as Perfluorinated polymers in designing …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 661–674 Read article
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Some Aspects of the Vagaries in the Pattern of Meteorological Parameters in the State of Rajasthan in Association with the LULC Change
Abstract: Present work examined the role of the change in land use and land cover (LULC) in altering the rainfall and temperature pattern over the western part of the Rajasthan, India. For this purpose, the high-resolution gridded rainfall and surface temperature data sets prepared by IMD (India Meteorological Department) and Climatological Research Unit Time Series (CRU TS 3.21) have been utilized. An increase in surface temperature and decrease in rainfall for …
Published in Journal of Remote Sensing & GIS · Vol. 8, Issue 1, 2017 · pp. 53–65 Read article
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Thermal Behavior of Biomass Ashes with the Influence of Additives: A Critical Review
Abstract: The gasification of biomass is undoubtedly one of the most promising processes for sustainable energy and heat production. The formation of low-melting ashes can compromise the proper functioning of plants. To address potential risks of ash fusion and agglomerate formation in high-temperature zones that may occur in downdraft reactor configurations, a detailed literature review on the use of additives to counteract the risk of ash formation and deposition has been …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 14, Issue 3, 2024 · pp. 1–11 Read article
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Effect MFD Viscosity on Bénard–Marangoni Ferroconvection in a Rotating Ferrofluid Layer with Convective Surface Boundary Condition
Abstract: AbstractThe combined effect of Coriolis force due to rotation and magnetic field dependent (MFD) viscosity on the onset of Bénard–Marangoni convection in a horizontal layer of ferrofluid is investigated theoretically. The lower boundary is taken to be rigid–isothermal, while the upper free boundary open to the atmosphere is flat and subject to a convective surface boundary condition. The Galerkin technique is employed to extract the critical stability parameters numerically. It …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 2, 2020 · pp. 12–32 Read article
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Mathematical Analysis and Stability Analysis of Coupled Orbital–Attitude Dynamics for Autonomous Spacecraft under Perturbative Forces
Abstract: Autonomous spacecraft operating in Earth orbit are subjected to coupled translational and rotational dynamics influenced by gravitational and environmental perturbations. Accurate mathematical characterization of these interactions is essential for trajectory prediction, attitude stabilization, autonomous navigation, and mission reliability. This study develops a nonlinear mathematical framework for coupled orbital–attitude dynamics of an autonomous spacecraft under perturbative forces. The translational dynamics are formulated using the two-body gravitational model augmented by the second …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 15, Issue 2, 2026 Read article
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Designing of a Simple, High Performance Nitrogen Laser for Laser Induced Florescence (LIF) Studies
Abstract: Laser is a very important tool in various disciplines. Due to high costs in other traditional lasers such as Nd: YAG laser, many schools, colleges and universities in Namibia could not afford to buy or maintain expensive lasers. Therefore, we propose a design for construction of a simple Nitrogen laser for Laser Induced Florescence (LIF) studies in Namibia (UNAM). The N2 laser design will be constructed in the structure of …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 4, Issue 2, 2015 · pp. 19–22 Read article
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PV System Performance in Variable Climatic Conditions
Abstract: This paper is focused to the study of the panel temperature operating under different climatic conditions; to this goal a detailed model has been developed to estimate the response of the panel temperature to various scenarios. The model has been designed based on energy balance, where temperature of the panel is estimated applying heat exchange processes with the environment, mainly convection and radiation, considering the effects of ambient temperature, wind …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 11, Issue 2, 2021 · pp. 11–27 Read article
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Precipitable Water for Human Consumption in Rural Areas: Calculation Method and Engineering Design
Abstract: This work describes a methodological process to estimate the precipitable water for human consumption as a function of meteorological parameters like ambient and dew point temperature, water vapor and ambient pressure, and relative humidity. The paper uses empirical correlations to determine the most accurate procedure for atmospheric rainwater, resulting in a simple relation between precipitable water and dew point temperature as the highest accurate one. The study shows the dew …
Published in Journal of Water Resource Engineering and Management · Vol. 11, Issue 3, 2024 · pp. 41–57 Read article
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Low-cost Air Quality Monitoring System for Dhaka City
Abstract: AbstractContamination is the expansion of any substance or any type of vitality to nature at a rate quicker than it very well may be scattered, weakened, deteriorated, reused, or put away in some innocuous structure. Pollution has become a crucial problem for busy cities all around the world. There are many types of pollution among them: air pollution, water pollution, soil pollution, food pollution, noise pollution, light pollution, thermal pollution …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 3, 2019 · pp. 33–41 Read article
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Comparative Analysis of Artificial Intelligence-based MPPT Algorithms for Wind Energy System
Abstract: By extracting maximum possible power from a wind generator system, the efficiency of the system can be increased. Radial basis function (RBF), feed forward back propagation (FFBP) and adaptive neuro-fuzzy inference system (ANFIS) are recognized as the universal estimators. This paper presents a single network based maximum power point tracking (MPPT) of a wind turbine system using these algorithms. The single network based maximum power extraction method is simple and …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 3, 2020 · pp. 7–18 Read article
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Experimental Investigation of Effect of Temperature and Molarity on Compressive Strength of Geopolymer Concrete
Abstract: Geopolymer concrete is a relatively new development in the field of concrete, in which regular Portlandcement is completely replaced with pozzolanic material such as fly ash, which is then activated by astrongly alkaline solution to function as a binder in the mix. As a result, we must manufactureenvironmentally friendly concrete to address issues such as global warming and CO2 emissions intothe atmosphere generated by standard Portland cement production. An experimental …
Published in Journal of Experimental & Applied Mechanics · Vol. 12, Issue 3, 2021 · pp. 34–39 Read article
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EMBEDDED CONTROLLER FOR ENERGY EFFICIENT OCCUPANCY MONITORING
Abstract: Air conditioning systems are the important part for providing ambient atmosphere inside buildings, for that building energy management systems (BEMS) are used. Ambient atmosphere means temperature control, humidity control, electronic equipment’s control, etc. The system consists of an embedded processor with an Internet of things (IoT) platform integrated with IR sensor and camera systems. The IoT devices have several sensors for measuring various parameters like temperature, humidity, inlet air coming …
Published in Journal of Software Engineering Tools & Technology Trends · Vol. 5, Issue 1, 2018 · pp. 6–11 Read article
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Pressure Swing Adsorption Process for Reduction of Argon-41 Release from Nuclear Reactor Exhaust Systems
Abstract: In several nuclear reactors, huge quantity of air (in the order of 10,000 cmh) is continuously passed to cool the calandria vault. This results in high radiation field due to argon-41. It is necessary to isolate and recover argon from these environments, which can bring down the activity release to the atmosphere in attaining ALARA principle. Pressure swing adsorption (PSA) technique has been employed by combining molecular sieves 5A (MS5A) …
Published in Journal of Nuclear Engineering & Technology · Vol. 5, Issue 1, 2015 · pp. 25–28 Read article