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23 articles for “Pulse compression”
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A New Optimal Biphase Pulse Compression Codes based on Cosine Mapping
Abstract: In proposed method a new optimization algorithm based on cosine mapping is introduced for radar pulse compression. The algorithm generate optimal chaotic biphase sequence having good autocorrelation and cross correlation properties. The sequence produces inherently small side lobes in autocorrelation function (ACF) of matched filter. Reduced values of side lobe level signify the optimal values of merit factor (MF) and peak side lobe level (PSL) and hence enhancement in radar …
Published in Recent Trends in Electronics Communication Systems · Vol. 2, Issue 2, 2015 · pp. 20–25 Read article
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Assessing the Influence of Aggregates and Cement Type on the Properties of Roller-compacted Concrete
Abstract: Roller-compacted concrete (RCC) pavement is suitable for heavy traffic and harsh environment. In the present investigation, RCC slab samples have been prepared using two types of aggregates (crushed and rounded), and two types of cement binder (ordinary Portland and sulphate resistant). Cubes and beam specimens have been extracted from the slab samples with the aid of diamond saw. Specimens were tested for bulk density, ultrasound pulse velocity, compressive and flexural …
Published in Trends in Transport Engineering and Applications Read article
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Latex Modified Concrete for Development of Sustainable Architecture
Abstract: To improve the performance of concrete, latex polymer and fly ash are mixed with concrete. This paper presents the effects of using additive material styrene-butadiene rubber (SBR) Latex and Admixture Fly Ash as a partial replacement to cement in mortar mixes. In this research comparison between with or without the replacement of fly ash and polymer is studied for Compressive strength, split tensile strength, flexural strength and ultrasonic pulse velocity …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 2, 2019 · pp. 39–49 Read article
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Review paper on Design and Development of Miniature Moving Magnet Pulse Tube Cryocooler
Abstract: Developing a miniature moving magnet pulse tube cryocooler to address the limitations in existing cryocooler technologies, especially in terms of compactness, lightweight design, durability, and maintenance-free operation, aligns with the demands of modern applications, particularly in space and similar environments. Integrating a miniature compressor and motor is essential for the functionality of the cryocooler. The design should prioritize efficiency and reliability while addressing challenges related to vibrations and maintenance commonly …
Published in Journal of Polymer & Composites · Vol. 12, Issue 3, 2024 · pp. 194–205 Read article
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Orthogonal Thirty-Two Phase Sequence Sets Design
Abstract: In using orthogonal signals, a multi-input, multi-output (MIMO) radar system and a spread spectrum communication system can improve operating efficiency. The usage of polyphase coded signals as pulse compression sequences sets is a superior alternative. The Modified Genetic Algorithm (MGA) is utilized as a global optimization strategy to create thirty-two phase sequence sets in this work. Design orthogonal thirty-two phase sequence sets with an impulse-like Autocorrelation Function (ACF) and a …
Published in Current Trends in Signal Processing · Vol. 12, Issue 2, 2022 · pp. 33–39 Read article
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Assessment of Compressive Strength of OPC and PPC-Based Concretes Combined by Ultrasonic Pulse Velocity and Rebound Hammer
Abstract: In this study, non-destructive tests were performed on ordinary Portland cement (OPC) and Portland pozzolana cement (PPC) based concrete specimens, namely the ultrasonic pulse velocity (UPV) and rebound hammer (RN). A relationship is thus established between the NDT values and the compressive strength. A statistical regression analysis was performed between the compressive strength with UPV and RN values to obtain a best-fit relationship and correlation coefficients. To take into account …
Published in Journal of Construction Engineering, Technology & Management · Vol. 2, Issue 1-3, 2012 · pp. 1–16 Read article
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Assessing the influence of aggregates and cement type on the properties of roller compacted concrete
Abstract: Roller compacted concrete pavement is suitable for heavy traffic and harsh environment. In the present investigation, roller compacted concrete slab samples have been prepared using two types of aggregates, (crushed and rounded), and two types of cement binder, (ordinary Portland and sulphate resistant). Cubes and beam specimens have been extracted from the slab samples with the aid of diamond saw. Specimens were tested for bulk density, ultrasound pulse velocity, compressive …
Published in Trends in Transport Engineering and Applications · Vol. 8, Issue 2, 2021 · pp. 1–7 Read article
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Strength Assessment of RCC Beams Subjected to Corrosion
Abstract: The damage assessment of civil structural members is one of the most important and recently emerging fields in engineering. Deterioration of a structure may occur due to a host of factors such as poor workmanship, improper maintenance, atmospheric effects, accidents, natural calamities. Certain causes like environmental effects, natural calamities cannot be controlled. Therefore, durability of concrete structures especially those exposed to aggressive environments is of great concern. Many deterioration causes …
Published in Recent Trends in Civil Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 139–152 Read article
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Effect of Silica Fume on the Engineering Properties of Fly Ash-Based Geopolymer Concrete Using 100% Recycled Concrete Aggregate
Abstract: Construction and demolition (C&D) waste has generated an enormous amount in developing countries like India due to explosive infrastructures and increasing urbanization, causing numerous concerns regarding the environment and economy. Recycling of aggregate from C&D debris is a beneficial approach to sustainable development and a circular economy. In contrast, numerous drawbacks of the integration of recycled concrete aggregates are due to adhered mortar remaining on their surfaces, reducing the strength …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1316–1325 Read article
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Investigation of Physical Characteristics and Machining Parameters of Improved Al-SiC MMC Using Dry EDM Process for Aerospace Industries
Abstract: Aluminium-based composite is widely used in aerospace and automobile industries because it is lighter in weight; but the trouble is that it is easily worn-out and life of the components is decreased. To overcome these problems, aluminium silicon carbide composite material has been developed with good wear-resistance, hardness and lighter weight. Silicon carbide has good mechanical properties like wear resistance, hardness, toughness and high melting point. Silicon carbide weight fractions …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 1, 2018 · pp. 15–32 Read article
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Empowering Concrete: Enhancing Strength and Durability with Coal Bottom Ash
Abstract: The utilization of coal bottom ash, an industrial waste byproduct, as a sustainable alternative to river sand in concrete production has gained increasing attention due to environmental concerns and the need for resource optimization. This study examines how incorporating coal bottom ash into concrete mixtures, either partially or entirely replacing river sands, affects different properties. These properties include the workability of fresh concrete, as well as its compressive strength, splitting …
Published in Recent Trends in Civil Engineering & Technology · Vol. 14, Issue 1, 2024 Read article
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Feasibility of Using Nondestructive Testing (NDT) in Roller Compacted Concrete Quality Assessment
Abstract: Roller compacted concrete is a no slump, heavy duty concrete usually used in pavement constructed of roadway, parking lots, in areas of frozen environment or aired region where there is shortage of water for curing, and when other paving alternatives do not satisfy the pavement design requirements regarding heavy loading, and nonstandard wheel configuration. The traditional testing e slab samples have been prepared in the laboratory using two types of …
Published in Trends in Transport Engineering and Applications · Vol. 2, Issue 3, 2015 · pp. 30–39 Read article
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Investigation of Sulphate, Alkali and Carbonation Chemical attack in GGBS-Based Geopolymer Concrete and OPC Concrete
Abstract: This study presents a comparative evaluation of the durability of GGBFS-based Geopolymer Concrete (GPC) and OPC concrete in rapid carbonation, sulphate, and alkali environments. All samples were subjected to three severe conditions are carbonation at 4% CO₂, 25°C and 60% relative humidity, exposure to a 10% sodium sulphate (Na₂SO₄) solution, and immersion in a 10% sodium hydroxide (NaOH) solution for alkali resistance. The durability characteristics were evaluated by the compressive …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 13–35 Read article
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Experimental Investigation of EAFS Aggregate Concrete by Partially Replacing Cement with Single Blended SCMs Fly Ash, GGBS and UGGBS for Sustainable Concrete
Abstract: This study represents research work on the effect of electric arc furnace slag (EAFS) aggregate containing concrete with the utilization of different secondary cementitious materials (SCMs) in single blending, which is the extension of our previous work to optimize EAFS aggregate in concrete. We found 50% EAFS aggregate replacement performance comparatively better as compared to natural aggregate. A total of 12 concrete mixes were cast in different single blended SCMs …
Published in Recent Trends in Civil Engineering & Technology · Vol. 13, Issue 2, 2023 · pp. 28–35 Read article
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Polymer Based Optoelectronics in Clinical Application Treated with Sodium Fluoride and Aqueous Dimethyl Sulfoxide Solutions
Abstract: In polymer science, dimethyl sulfoxide (DMSO) and sodium fluoride (NaF) are frequently combined to dissolve, modify, or treat particular polymers, most notably in the processing of cellulose and the creation of polyvinylidene fluoride (PVDF) membranes. The viscosities, ultrasonic velocities, and sodium fluoride densities of aqueous solutions of dimethyl sulfoxide (DMSO) have been measured at T=303.15, 308.15, 313.15, and 318.15 K. Fluorides (such as NaF or TBAF) help break inter-chain hydrogen …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 20–29 Read article
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Durability Assessment of Geopolymer and OPC Concretes under Chloride and Sulphate Chemical Attack
Abstract: The main problems with durable concrete constructions are attacks by sulphates and chlorides on concrete. The primary objective of this study is to evaluate how the strength properties of concrete are affected by the incorporation of fly ash when exposed to environmental conditions involving sulphate and chloride solutions. In this research, geopolymer concrete (GPC) is utilized as a replacement for conventional ordinary Portland cement (OPC). The concrete composition is prepared …
Published in Journal of Polymer & Composites · Vol. 13, Issue 5, 2025 · pp. 202–218 Read article
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Experimental Investigation on the Effect of Manufactured Sand in Concrete
Abstract: Concrete is the most widely used construction material owing to its versatile nature. Three fourth of the concrete is made of aggregates, amongst which fine aggregate has massive demand. River sand is the predominantly used fine aggregate, which is under significance because of the increased demand and less availability. The continuous mining of river sand has also affected the environment; ecologically and economically. Manufactured sand offers viable alternative to natural …
Published in Recent Trends in Civil Engineering & Technology · Vol. 6, Issue 1, 2016 · pp. 45–52 Read article
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From Waste to Strength: Hybrid Binder Approach for Sustainable M25 Concrete
Abstract: The growing demand for concrete in infrastructure development has led to increased cement consumption, raising serious environmental concerns due to high energy use and carbon dioxide emissions correlated with cement manufacturing. In this context, the use of industrial residues as partial substitutions for cement has achieved deep focus as a sustainable construction strategy. The current investigations experimentally explore the strength and quality performance of concrete produced using a hybrid binder …
Published in Journal of Construction Engineering, Technology & Management · Vol. 16, Issue 1, 2026 · pp. 24–32 Read article
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Performance Evaluation of PET Strip Fiber Reinforced Concrete
Abstract: Polyethylene Terephthalate, commonly known as PET, is a petroleum-based plastic polymer that is widely used in the packaging of various commodities due to its durability, and poses a major threat to the environment. To tackle this scenario, the construction industry is researching all possibilities to incorporate this waste into concrete and enhance the properties of concrete. The present study evaluates the performance characteristics of M 30 grade concrete when reinforced …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 1076–1088 Read article
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Optimized Utilization of Kota Stone Slurry Waste in Fly Ash–Based Geopolymer Mortar: A Taguchi-Driven Approach
Abstract: The large-scale generation of stone-processing wastes presents a critical sustainability challenge and an opportunity for value-added reuse in construction materials. This study develops a high-performance fly ash geopolymer mortar by partially replacing Class F fly ash with Kota stone slurry waste (KSSW) and optimizing the key mix parameters using a Taguchi design framework. Five governing factors—binder replacement level, NaOH molarity, sodium silicate–to–sodium hydroxide ratio (SS/SH), curing temperature, and alkaline solution-to-binder …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 426–445 Read article