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1387 articles for ““SPA””
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High-Energy Astrophysics: Exploring the Extreme Universe Through Radiation, Relativistic Phenomena, and Cosmic Cataclysms
Abstract: High-energy astrophysics is a fast-developing area of astrophysical research dedicated to exploring the universe’s most powerful and extreme events. It involves investigating dense and energetic cosmic objects and phenomena, including black holes, neutron stars, supernova remnants, gamma-ray bursts, and active galactic nuclei. These sources emit radiation predominantly in the X-ray and gamma-ray regions of the electromagnetic spectrum and are often associated with high-energy particles, including cosmic rays and neutrinos. Investigating …
Published in International Journal of Universe · Vol. 2, Issue 1, 2026 · pp. 10–15 Read article
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Integrated Polarimetric-Interferometric Fusion for Heterogeneous Urban Signature Extraction
Abstract: Mapping heterogeneous urban environments using conventional Synthetic Aperture Radar (SAR) backscatter intensity frequently produces classification errors due to spectral similarity between sparse built-up features, bare soil, and dry vegetation a challenge especially acute in semi-arid Deccan Plateau settings. This research presents a dual-path Pol- InSAR fusion framework that integrates polarimetric scattering decomposition and interferometric coherence stability to extract heterogeneous urban signatures over Beed Taluka, Maharashtra (area: 1,561.31 km²). A temporal …
Published in Journal of Remote Sensing & GIS · Vol. 17, Issue 2, 2026 Read article
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Dissipative Particle Dynamics Simulation Study on the Evolution of Photoinitiated Free Radical Polymerization Crosslinked Networks
Abstract: Gradient polymer materials overcome the limitations of conventional homogeneous polymers by integrating multiple distinct functionalities within a single continuous structure. Although photoinitiated free-radical polymerization offers excellent spatial and temporal control, the underlying microscopic mechanisms governing network evolution under non-uniform light fields remain poorly understood. In this study, a mesoscale dissipative particle dynamics (DPD) model was successfully developed to couple free-radical polymerization kinetics—including initiation, propagation, crosslinking, and termination—with exponential light attenuation …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 · pp. 142–158 Read article
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Generative AI-Based Inverse Design of Sustainable Biodegradable Polymers with Target Mechanical and Thermal Properties
Abstract: The escalating global plastic pollution crisis has intensified the urgent need for sustainable biodegradable polymer alternatives that can match or exceed the performance of conventional petroleum-based plastics while minimizing environmental impact. However, traditional polymer discovery approaches are severely constrained by high experimental costs, protracted development cycles spanning years, and fundamental inability to simultaneously optimize multiple conflicting material properties such as mechanical strength, thermal stability, and degradation kinetics. This study presents …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 1285–1295 Read article
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Reduction of Air Pollutants of Urban Canyons through Management of Particulate Matters 2.5 in the Streets
Abstract: Urban canyons are long and high sky-scrappers closely to narrow streets result in very different microclimate challenges. These spaces often trap pollutants and restrict air circulation and intensify more retention of heat making them very uncomfortable for pedestrians. In order to resolve this issue a strong set of design guidelines and frameworks were needed which can balance out the human comfort and environmental aspects. This research studies strategies to improve …
Published in International Journal of Environmental Noise and Pollution Control · Vol. 3, Issue 1, 2025 · pp. 11–23 Read article
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An Investigation on Application of Passive Strategies to Improve Thermal Performance of Buildings
Abstract: AbstractThermal comfort is a state of mind that expresses satisfaction with the surrounding environment of the building space. It is different for every individual and also, depends on the nature of activity of each individual occupant in the building. Understanding thermal comfort is important to building architecture, since it not only the basis for building design, but also affects the field of sustainable design or Green Buildings. Buildings’ as a …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 1, 2018 · pp. 12–16 Read article
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Review in Friction Stud Welding Of Aluminium to Steel
Abstract: The demand for friction stud welded aluminum/steel joints has increased in many significant applications including cryogenics, structural engineering, spacecraft, rocket fuel tanks and high vacuum chambers owing to their superior properties. In automobile engineering, there is a requirement to join a mild steel earthing pin which is in the shape of a stud to an aluminum car body. Aluminum and steel was considered to join using friction stud welding. This …
Published in Journal of Thermal Engineering and Applications · Vol. 8, Issue 3, 2021 · pp. 19–24 Read article
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Homogeneous Video Transcoding Functions for High-Efficiency Video Coding
Abstract: High-efficiency video coding (HEVC) is the successor of H.264/AVC and it gives the higher compression ratio and high quality video than H.264. But, HEVC increases the computational complexity of video coding due to its flexible quad tree partitioning structure. Transcoding algorithms are very much required to associate the HEVC standard into real applications. Homogeneous video transcoding is used for conversion between the same video formats. A higher quality video at …
Published in Current Trends in Signal Processing · Vol. 7, Issue 2, 2017 · pp. 32–36 Read article
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Constrained Online Non Negative Matrix Factorization (CONMF) for Visual Tracking
Abstract: Visual tracking is the process of locating a moving object (or multiple objects) over time using a camera. It is one of the most important components in numerous applications such as military, secure control, crime prevention systems, access control and biometric identification etc. of computer vision. In visual tracking, holistic and part-based representations are both popular choices to model target appearance. The former is known for great efficiency and convenience …
Published in Current Trends in Signal Processing · Vol. 7, Issue 1, 2017 · pp. 8–18 Read article
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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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LIFESAVER, Modified Version of an Ambulance
Abstract: LIFE SAVER’ is a modern iteration of a conventional ambulance with crucial medical equipment that can be vital to save the patient during a critical condition. This paper mainly focus on the exterior design of the conventional ambulance to use its more space for better treatment. The conventional ambulance has its basic exterior structure, in LIFESAVER ,the size and shape of exterior part is use and remodified in such a …
Published in Journal of Automobile Engineering and Applications · Vol. 7, Issue 2, 2020 · pp. 20–24 Read article
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Reduction of Pollutant for SI Engine Using Argon and Oxy-hydrogen
Abstract: Reducing the emission associated with oil combustion is gaining increasing interest worldwide. Due to their dangerous effects on human health, vegetation and climate, various pre-combustion, in-cylinder and post combustion techniques have been tried for their abatement. The combustion of a hydrocarbon fuel with air produces mainly carbon dioxide(CO2) and Water(H2O). However, internal combustion engines are not perfectly efficient, so some of the fuel is not burned, which results in the …
Published in Journal of Automobile Engineering and Applications · Vol. 2, Issue 2, 2015 · pp. 29–34 Read article
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Paper Production from Flower: Recycling of Flower Waste
Abstract: AbstractThis proposal provides an alternative approach for solid waste management. Solid waste is usually landfilled or incinerated, the volume of solid waste that can be recycled is found to be minimal. This approach will focus on reducing the solid floral waste. India is a country where religion and festivals are part of our lives; we usually worship by providing offerings mostly flowers, coconut, and fruits. Flowers are been widely used …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 9, Issue 2, 2018 · pp. 77–80 Read article
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Role of Solid Acid Catalyst in Isopropylation Reaction
Abstract: Cumene synthesis was carried out by the reaction of benzene with isopropyl alcohol in the vapour phase over rare earth metal modified 13X zeolite. Zeolite modification was done by exchanging sodium ions of the zeolite with cerium ions to vary the acidity of the catalyst in the range of 0.25‑1.36 meq/g. The synthesis was carried out over a wide range of operating conditions. The synthesis conditions were optimized by studying …
Published in Journal of Catalyst & Catalysis · Vol. 2, Issue 2, 2015 · pp. 19–26 Read article
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Experimental Study on Compressive Strength of Ferrocement
Abstract: AbstractFerrocement construction technology is quite popular throughout the world. Ferrocement as thin material can be used as building components as well as a repair material. Ferrocement composite consists of cement-sand mortar with wire mesh to produce elements of small thickness having high durability, resilience and when properly shaped, it has high strength and rigidity. Ferrocement differs from conventional reinforced concrete or prestressed concrete primarily on the basis of nature, placing …
Published in Journal of Construction Engineering, Technology & Management · Vol. 7, Issue 3, 2017 · pp. 25–29 Read article
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MULTI STOREY CAR PARKING SYSTEM
Abstract: A City like Delhi has over five million car and two wheelers on its road , but not enough parking space . The demand for parking space on a n average in the main market of Delhi , outstripped demand by 43%. Multi-storey car parking provide lower building cost per parking slot, as they typically required less building volume and less ground area then a conventional facility with the same …
Published in Journal of Construction Engineering, Technology & Management · Vol. 9, Issue 1, 2019 · pp. 26–29 Read article
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Design and Verification of Low Power High Speed Voltage Level Shifter Based on Pass Transistor Methodology
Abstract: This study explains how a voltage level shifter (LS) can be built using a Wilson current mirror level shifter (WCMLS) with a mirrored output. The proposed fix avoids WCMLS's typical issue of requiring a mirror with a size ratio that is too large. It's a space- and cost-saver. The proposed LS requires less components than its modern versions and uses only tiny components, taking up even less space. The proposed …
Published in Journal of Control & Instrumentation · Vol. 14, Issue 2, 2023 · pp. 30–37 Read article
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Numerical Analysis of Tube Fitted with Internal Baffles used in STHEx
Abstract: A numerical simulation was carried out for heat transfer in a circular tube fitted with rectangular internal baffles using CFD software. The Reynolds number and Prandtl number were varied in the range from 20 to 2000. In-house CFD solver is used for solving Navier-Stoke’s equation coupled with energy equation for internally fitted baffles as a computational domain. The baffles are attached alternately up and down equally spaced on the walls …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 46–54 Read article
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Concrete Compressive Stress-Induced Crack Analysis and the Main Causes of Concrete Cracks in Construction
Abstract: The findings of experimental investigations into the micromechanical behaviour of concrete under various loading scenarios are presented in this work. Concrete specimens with normal and high strengths were examined under uniaxial compression in constrained spaces. Injection of a low melting point alloy was done into the concrete specimens' pores and fissures. To preserve the load-induced stress microcracks and the pictures from the cross sections of the concrete specimens photographed by …
Published in Journal of Experimental & Applied Mechanics · Vol. 13, Issue 2, 2022 · pp. 11–15 Read article
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Coin Based Mobile Charger Using Arduino
Abstract: Since a few years ago, mobile phones have been fantastic tools for communication and everyday use. Therefore, maintaining a mobile phone's battery has become a more important duty. In this project, we created a working prototype for coin-operated mobile battery charging. For all mobile users who might not have access to conventional power banks while travelling or in an emergency, a coin-based mobile charging system offers an alternative solution. Shop …
Published in Journal of Electronic Design Technology · Vol. 14, Issue 1, 2023 · pp. 21–28 Read article