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122 articles for “ac (alternating current)”
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Study The Effect of The Alcoholic and Hot Aqueous Extract of Costus specious on Some Bacterial Species
Abstract: Plant extracts are among the methods that have been used since ancient times in alternative medicine and are still developing until recently with the progress of science and modern technologies. These materials can be used in the composition of many pharmaceutical drugs. The current research aimed to evaluate the inhibitory effect of alcoholic and hot aqueous extract of the roots of Costus specious on some gram-positive and gram-negative bacteria (Enterococcus …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 14, Issue 3, 2024 · pp. 13–18 Read article
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Influence of Crystallization Time by Hydrothermal Synthesis of Ag NPs-Zeolite Composite
Abstract: Inorganic molecules undergo a chemical reaction that results in the production of a brand-new building material known as geopolymer concrete. Otherwise known as an inorganic aluminohydroxide polymer, geopolymer is made mostly from by-products like fly ash and geologically derived silicon (Si) and aluminium (Al). It is a superior building material for the future because of its great mechanical qualities, significant chemical resistance (attack by magnesium or sulphate), low shrinkage and …
Published in Journal of Polymer & Composites · Vol. 11, Issue 1, 2023 · pp. 46–51 Read article
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Investigation of FPGA based PWM Control Technique for AC Motors
Abstract: This paper proposes a Random Frequency PWM synchronized for a three phase inverter implemented with use of Field Programmable Gate Array (FPGA) and applied to a 1-hp induction motor drive system for the reduction of harmonics and improvement of fundamental peak voltage. For providing alternating output voltage with a specific magnitude and frequency to industrial applications, three-phase inverter is preferred. The gating signals to the inverter are produced by means …
Published in Journal of Power Electronics and Power Systems · Vol. 3, Issue 2, 2013 · pp. 16–22 Read article
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Development and Evaluation of Sodium Hydroxide-Treated Jujube Pit Reinforced Epoxy Composites
Abstract: The automotive sector has experienced a tremendous transformation, propelled by the increasing demand for materials that provide a balance between mechanical performance, economic efficiency, and environmental sustainability. In accordance with worldwide sustainability goals, the trend has moved toward the utilization of lightweight, recyclable, and biodegradable materials in modern vehicle architecture. Natural composite materials, which are derived from renewable resources such as seeds, leaves, and tree barks, have gained considerable attention …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 494–501 Read article
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Mechanical & Tribological Characterization of Al2024-Alumina-Graphite Reinforced Monolithic and Hybrid Composites
Abstract: This work investigates the mechanical characteristics of Al2024-Al2O3-Graphite reinforced monolithic and hybrid composites fabricated by the stir casting method. Exploratory work involved the fabrication of monolithic composites with varying Al2O3 contents (5-8 wt%) and hybrid composites with the ratios of Al2O3 (2-6 wt%) and Graphite (1-3 wt%) in matrix Al2024. For improving their dispersion, preheated reinforcement particles were introduced in matrix alloy at controlled stirring rates. A homogeneous particle distribution …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 823–836 Read article
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High Strength Bolt Tightening and Verification Techniques for Steel Connections: In-Depth Study and National Survey
Abstract: The current means and methods of verifying that high strength bolts have been properly tightened is very laborious and time consuming. In some cases, the techniques require special equipment and in other cases the verification itself may be somewhat subjective. While some commercially available verification techniques do exist, there are drawbacks such as being costly, time-consuming, and impractical to use in the field. The main objectives of this project were …
Published in Journal of Construction Engineering, Technology & Management Read article
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An Experimental Investigation on Hybrid Polymeric Composite Materials Reinforced with Sisal & Acacia Fiber
Abstract: AbstractThe demand for wood materials in the construction of building field is on the rise. This leads to the depletion of natural resources and encourages deforestation. The polymeric composite materials reinforced with natural fiber are being used as a wood substitute and is also used for fabricating interior parts of the automobiles. Acacia fiber is also added to the polyester resin, since it is good in compressive and tensile strength. …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 3, 2018 · pp. 19–24 Read article
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Brushless DC Motor Drive System with Reduced DC-Link Capacitor for Reduction in Torque Ripple
Abstract: Presence of large value of dc-link capacitance in a brushless DC motor (BLDCM) drive system leads to an increase in the weight and volume of the system. A combination of an IGBT switch along with a small value of DC-link capacitance is proposed in this paper. BLDCM will be supplied by DC-link capacitor and rectified mains supply alternately via DC-link IGBT chopping during the time when the output voltage of …
Published in Trends in Electrical Engineering · Vol. 8, Issue 3, 2018 · pp. 19–27 Read article
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An Experimental Investigation of Machining Parameters on Aluminum Composites
Abstract: The need for a material with good mechanical, thermal, and wear resistant properties is satisfied by aluminum composite. However, the biggest obstacle to substituting it with alternative materials is the machining challenges. For this kind of hard-to-cut material, electric discharge machining is a very efficient method. Thus, using a Taguchi-based method, an attempt has been made to determine the most advantageous amount of input parameters for EDM of Al composite. …
Published in Journal of Polymer & Composites · Vol. 12, Issue 6, 2024 · pp. 8–13 Read article
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Environmental Advantages of Renewable Energy: A Review
Abstract: There is a shortage of fuel in many emerging nations, including India, because of increased manufacturing for many different development initiatives. If the thermal energy sources used to meet this rise in demand are coal-based, environmental damage and high production costs ensue. So, the greatest alternative approach is for the nation to build renewable energy-based power facilities. Sustainable in light of current and future societal, economic, and social demands, renewable …
Published in International Journal of Environmental Noise and Pollution Control · Vol. 1, Issue 1, 2023 · pp. 31–39 Read article
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Experimental Study on Microstructural Evolution and Tensile Properties of Robotic Pulse MIG Welded Steel
Abstract: Robotic pulse Metal Inert Gas (MIG) welding has emerged as an advanced joining technique capable of producing superior weld quality through precise control of welding parameters. The present study evaluates the influence of welding parameters on the microstructural evolution and tensile properties of steel weldments fabricated using robotic pulse MIG welding and compares the results with conventional pulse MIG welding. Microstructural characterization was carried out using Scanning Electron Microscopy (SEM) …
Published in Journal of Experimental & Applied Mechanics · Vol. 17, Issue 2, 2026 · pp. 40–52 Read article
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Evaluating the Role of Alternative Medicines – A Critical Review of Therapies and Research
Abstract: Alternative medicine encompasses healthcare practices outside conventional medicine, including acupuncture, homeopathy, naturopathy, herbal medicine, yoga, and more. Despite growing popularity, alternative therapies often lack rigorous proof of effectiveness and long-term safety. This review examines various branches of alternative medicine, their benefits, and challenges. The paper discusses Ayurveda, homeopathy, acupuncture, naturopathy, herbal medicines, mind-body therapies, and manipulative and body-based therapies. It highlights the pros and cons of alternative medicine, including holistic …
Published in Research and Reviews: A Journal of Medicine · Vol. 15, Issue 1, 2025 · pp. 1–15 Read article
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Controlled Release of Anti-Inflammatory Drugs from Biopolymer Matrices
Abstract: Carefully releasing anti-inflammatory drugs from natural materials is a new way to make treatments work better and cut down on the side effects of current drug delivery methods. To slowly release drugs, this method uses safe, reusable materials. It's a good alternative to pills or shots. Anti-inflammatory drugs that are used to treat long-term conditions like gout and inflammatory bowel disease work better when they are made in a controlled …
Published in Journal of Polymer & Composites · Vol. 13, Issue 4, 2025 · pp. 388–399 Read article
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Performance Appraisal of Two-stage On-site Domestic Wastewater Treatment System under Ambient Environment
Abstract: AbstractThe rapid growth in population has rendered the centralized sewerage systems a non-realistic option in sparsely populated areas. Consequently, an on-site wastewater treatment system (OWTS) is a viable alternative and cost-effective solution of sewerage system. Septic tanks with soil absorption systems are a simple mean of onsite treatment of the domestic wastewater. However septic tanks have low treatment efficiency along with several technical and constructional drawbacks. In order to improve …
Published in Recent Trends in Civil Engineering & Technology · Vol. 8, Issue 1, 2018 · pp. 20–28 Read article
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Circuit Topologies, Operation, Control Schemes and Modulation Techniques of Modular Multilevel Inverter
Abstract: The Modular Multilevel Converter (MMC) is one of the developing topology. MMC has several attractive features such as a modular structure, transformer-less operation, easily scalable in terms of voltage and current, low expense for redundancy and fault tolerant operation and excellent output waveforms quality. Due to these attractive features industry and researcher increased the interest in this converter. This interest results in the development of new power topologies, modulation strategies …
Published in Journal of Power Electronics and Power Systems · Vol. 7, Issue 1, 2017 · pp. 28–40 Read article
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Radio-Frequency (RF) Energy Transfer and Harvesting Techniques with Rectifier and Antenna
Abstract: Electromagnetic energy has an important role in power and energy industry. As the demand for power increases, need for alternate energy sources are essential. Radio frequency (RF) energy transfer and harvesting techniques becomes one of the solutions. Basic RF harvesting circuit consists of three elements. This can be achieved by using a rectenna combination of rectifier and antenna. The antenna is to receive RF signal and rectifier to convert RF …
Published in Journal of Communication Engineering & Systems · Vol. 10, Issue 1, 2020 · pp. 1–5 Read article
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A Comprehensive Study on Rural Housing in India: A Review
Abstract: Rural housing plays a pivotal role in the socio-economic development of India, as it directly influences the quality of life, health, and productivity of rural populations. Despite the launch of several governmental initiatives aimed at addressing rural housing shortages, a substantial segment of the rural population continues to reside in inadequate, unsafe, and non-durable dwellings that lack basic amenities. This paper presents a comprehensive review of the current scenario of …
Published in International Journal of Rural and Regional Development · Vol. 3, Issue 2, 2025 · pp. 30–38 Read article
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Modeling of Overvoltage Protection by Lightning for a Grid-tied Solar Power System: A case of Vietnam
Abstract: AbstractThe solar power system has been widely developed due to its environmental friendliness and sustainability. Normally, PV panels would be preferable to set up on rooftop of building or free-standing in unsheltered areas. Therefore, the negative impacts on these systems from bad weather conditions, like storms and lightning, have been evident. Vietnam is located in the region of tropical monsoon weather, especially one of the three strongest thunderstorm areas in …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 11, Issue 2, 2020 · pp. 27–40 Read article
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Investigation of Migraine
Abstract: Individual's medical history, and any potential side effects that may occur. It is also important to consult with a healthcare provider before beginning any new treatment plan, as they can provide guidance on the best course of action based on the individual's specific needs and circumstances. In addition to medication, individuals with migraines can explore various treatment avenues. Lifestyle modifications, such as incorporating regular exercise, maintaining a healthy diet, managing …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 14, Issue 1, 2024 · pp. 38–45 Read article
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Navigating Polymer Processing: Advances, Challenges, and Future Horizons
Abstract: Polymer processing and composite manufacturing stand as crucial pillars in modern industry, facilitating the creation of materials tailored to specific requirements. This abstract delves into the multifaceted realm of techniques and methodologies governing these processes, essential for ensuring the delivery of materials endowed with desired properties and functionalities. A meticulous examination of extant literature forms the foundation, shedding light on the evolving landscape, challenges encountered, and promising avenues ahead. Traditional …
Published in Journal of Polymer & Composites · Vol. 12, Issue 5, 2024 · pp. 179–192 Read article