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372 articles for “Pulses”
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Design and Implementation of a Photovoltaic High-intensity-discharge Street Lighting System Using MPPT Algorithms
Abstract: This dissertation presents a grid-tied (PV) high-intensity-discharge (HID) street lighting system. During daytime, the battery is charged by a PV panel. A single-ended primary inductance converter (SEPIC) is studied for maximum power point tracking (MPPT). Accuracy and high efficiency battery charging can be achieved under a wide range of PV panel voltage variation. At night, the solar energy stored in the battery is released to drive the street lights by …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 1, Issue 2, 2013 · pp. 1–8 Read article
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Induction Motor Speed Control Using SCADA
Abstract: Single-phase induction motors are widely used in home appliances and industrial control because of their low cost and rugged construction. Many industrial processes require variable speed drives for various applications. This project investigates the speed control performance of single-phase induction motor using microcontroller AVR ATmega8a. PWM technique has been employed in this inverter to supply the motor with AC voltage. The 4n25 opto-coupler serves the purpose of isolation between the …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 5, Issue 1, 2017 · pp. 15–19 Read article
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Hybridizing Principle of TOPSIS with Regression Metamodel Approach for the Optimization of CNC-WEDM Process Parameters
Abstract: Experiment is conducted on a Computer Numerical Control wire electric discharge machine under different conditions of process parameters. The experiment is carried out by using Aluminum Alloy AA6061 as a work material and a Brass wire as a cutting tool in CNCWEDM. This paper aims to develop a combination of DOE and Entropy based TOPSIS to solve multi response parameter optimization problems. An experimental investigation was carried out based on …
Published in Trends in Mechanical Engineering & Technology · Vol. 6, Issue 3, 2016 · pp. 18–25 Read article
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Taguchi based Modeling and Optimization of Tool Wear Rate in Die-Sink EDM
Abstract: With the increasing demand for new, hard, high strength, and temperature-resistant materials in various engineering applications, especially in the field of mold manufacturing, aeronautic, automobile and die manufacturing industries, the development and application of electro-discharge machining (EDM) has become increasingly important to machine such difficult to machine hard materials. In this paper, the machining of EN-31 Die steel using EDM with a copper electrode by using Taguchi’s experimental design and …
Published in Journal of Production Research & Management · Vol. 2, Issue 1, 2012 · pp. 30–35 Read article
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Multi-response Optimization of Process Parameter of Spark Erosion Electric Discharge Machining Using Principal Component Analysis Coupled with TOPSIS
Abstract: Electric Discharge Machining (EDM) is a thermo-electric non-traditional machining process in which material removal takes place through the process of controlled spark generation between a pair of electrodes submerged in a dielectric fluid. Due to difficulty in the availability of EDM, it is very complicated to determine optimal process parameters for improving performance. Therefore, optimization of process parameters is an important action in machining, especially for nontraditional machining procedures like …
Published in Journal of Experimental & Applied Mechanics · Vol. 6, Issue 2, 2015 · pp. 70–80 Read article
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Optimization of Process Parameters in Electro-discharge Machining of EN24 Steel using Grey-Taguchi Method
Abstract: Electric Discharge Machining (EDM) is one of the nontraditional machining processes used to produce critical shape on hard or brittle conductive materials and it can also besuccessfully applied on materials that are extremely difficult-to-machine using traditional machining processes. In this experimental analysis the optimum machining parameters areestimated using Taguchi based method for EN24 steel which have wide range of application in aircraft, automotive and general engineering applications for example- propeller …
Published in Journal of Experimental & Applied Mechanics · Vol. 7, Issue 2, 2016 · pp. 48–53 Read article
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Design and Implementation of Single-Phase, Three-Level, Sub-Harmonic PWM Inverter with Short-Circuit Fault Detection
Abstract: This paper investigates the design and implementation of single-phase, three-level inverter controlled by sub-harmonic pulse-width modulation (SH-PWM). The performance of developed 3-level inverter is simulated and then is compared with 2-level conventional inverter as well as FFT analysis. Experimental test has been undertaken to examine the operating characteristics of the implemented inverter for supplying an inductive load. To increase the reliability of designed inverter in different applications, a short-circuit fault …
Published in Journal of Instrumentation Technology & Innovations · Vol. 5, Issue 2, 2015 · pp. 5–13 Read article
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Effect of Valsalva Maneuver Prior to Peripheral Intravenous Cannulation on Vital Signs
Abstract: Venous cannulation is a mandatory requirement for the administration of fluids, drugs, blood products and nutritional solutions. Insertion of an intravenous (IV) cannula is very distressing for many patients. A comprehensive approach is needed to ensure comfort during cannulation. Valsalva maneuver stimulates the vagus nerve and induces changes in vital signs. The objective of the current study was to evaluate the effect of Valsalva maneuver prior to peripheral IV cannulation …
Published in Journal of Nursing Science & Practice · Vol. 3, Issue 3, 2013 · pp. 16–20 Read article
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Laser Induced Damage Threshold of Pure and Doped TiO2 Thin Films
Abstract: In the present study, TiO2 and Ag-doped TiO2 thin films have been synthesized by sol-gel dip coating technique at a constant rate of 40 cm/s and annealed at a temperature of 400o c to obtain uniform film with good adhesion onto the substrate. Films have been characterized by XRD and UV-Vis spectroscopy that shows the structure of TiO2 films and decrease in band gap with doping of silver in TiO2. …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 8, Issue 2, 2018 · pp. 15–19 Read article
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Breathing for Brains: Yoga's Cognitive Transformation in College Students
Abstract: This study investigates the potential cognitive-enhancing effects of meditation and pranayama practices in young adults aged 18–25. A randomized controlled trial was conducted, with one group undergoing a two-month, meditation and pranayama intervention, while the other served as a control with no intervention. Various physiological parameters were assessed, including blood pressure, pulse rate, lung capacity, and oxygen levels. The intervention group practiced mindfulness, Om meditation, focus meditation, body scan meditation, …
Published in OmniScience: A Multi-disciplinary Journal · Vol. 13, Issue 3, 2023 · pp. 1–10 Read article
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Effect of Insect Infestation on the Physical Properties of Black Gram (Vigna Mungo)
Abstract: AbstractThough sample research has been conducted to study the effects of insect infestation on the quantitative and qualitative changes in food grains, no elaborate work has been reported on the effects of infestation on the physical properties of grains. In this research, physical properties of black gram including size, geometric mean diameter, sphericity, surface area, aspect ratio, 1000 kernel mass, bulk density, true density, porosity, specific gravity, angle of repose …
Published in Research and Reviews : Journal of Crop science and Technology · Vol. 5, Issue 1, 2016 · pp. 17–24 Read article
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Comparative Dietary Assessment of Geriatric Male Residing in Old Age Home and in Families of Udaipur City
Abstract: AbstractA man's life is normally divided into four main stages namely infancy, childhood, adulthood and old age. The present study was conducted to assess the dietary intake of old age people residing in old age home and in families of Udaipur city, India. The total sample of the present study was selected randomly andconsisted of 100 elderly male person out of that 50 respondents were from old age homes and …
Published in Research and Reviews : Journal of Dairy Science and Technology · Vol. 8, Issue 3, 2019 · pp. 17–23 Read article
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Performance Evaluation of Desi and Kabuli Type Chickpea Varieties at Hulbareg District Southern Ethiopia
Abstract: Chickpea (Cicer arietinum L.) is the third most important pulse crop and one of the major highland pulse crop widely grown in Ethiopia. They are two types of chickpea, called desi and kabuli. This study was conducted on Hulbareg district of Southern Ethiopia at 2020 cropping season. The field experiment was arranged a randomized complete block design with three replications to evaluate and select desi and kabuli type chickpea varieties …
Published in Research and Reviews : Journal of Crop science and Technology · Vol. 11, Issue 2, 2022 · pp. 22–28 Read article
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Modeling and Optimization of Extrusion Process for Black Gram–Carrot Pomace Incorporated Rice-based Extruded Product
Abstract: The purpose of this study was to optimize ready-to-eat extruded snack with incorporation of byproducts like broken rice, carrot pomace along with black gram to design a product which is rich in fibre and protein content. For optimization of extrusion process for the development of black gram–carrot pomace incorporated rice-based expanded product, experiments were planned in central composite design using response surface methodology. The independent process variables for extrusion were …
Published in Research & Reviews : Journal of Food Science & Technology · Vol. 4, Issue 1, 2015 · pp. 5–20 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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Radial oscillation modes of delta Scuti stars KIC 2439660, KIC 3219256 and KIC 6965789 investigated using Kepler asteroseismic science data
Abstract: With the rise of Asteroseismology, studying the interior properties of unreachable stars ispossible from Earth and Earth centered orbits. Delta Scuti stars KIC 2439660, KIC 3215692 andKIC 6965789 from the Kepler science data were used for our studies. Each star has around38750 data points within Kepler quarters of 17.1 and 17.2. After removing the null points in data,MATLAB software package was utilized to identify the best-fit curve of the frequency-amplitude …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 12, Issue 1, 2023 · pp. 9–20 Read article
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Detection of Stator and Rotor Winding Faults in Induction Motor using Park’s Vector Approach
Abstract: The Induction Motors in every rotating machine’s heart and it’s a very important component in a much. Almost 90 percent of the Induction Motor use in industry as a prime mover. So Induction Motor is necessary to Condition Monitoring for Economic Running Cost. Condition Based Monitoring of Induction Motor has become an important and difficult task for Engineers and Researchers mainly in Industrial applications. Several Condition Monitoring Methods (Technique) including …
Published in Journal of Control & Instrumentation · Vol. 12, Issue 4, 2021 · pp. 6–17 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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Electrical Discharge Machining for Precision Metal Working Industries
Abstract: EDM is called as Electrical Discharge Machining. Otherwise called as Spark Erosion Machining, Electro-Erosion Machining, Spark Machining, and Electro Discharge Machining. It is an unconventional machining process to machine hard metals and alloys. EDM has been a significant machining technique. The electrode, work piece materials, dielectric, and the range of pulse rate, current, and voltage make up the basic EDM process. The dielectric serves the following purposes: it transports removal …
Published in International Journal of Electro-Mechanics and Material Behaviour · Vol. 1, Issue 2, 2023 · pp. 7–11 Read article
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Progressive Developments in Cold Metal Transfer Welding Technique: A Review and Trends
Abstract: This comprehensive review paper examines the Cold Metal Transfer (CMT) welding process and its wide- ranging applications across various industries. With a focus on elucidating the fundamental principles, process characteristics, and recent advancements, the paper offers a comprehensive overview of CMT welding's versatility and effectiveness. The review delves into the intricate mechanics of the CMT welding process, highlighting its unique metal transfer modes like CMT-P, CMT advanced, CMT pulse rose, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 12, 2023 · pp. 235–245 Read article