Vignan University

About: Vignan University is a education organization based out in Guntur, Andhra Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.

Antireflection nanocomposite coating on PV panel to improve power at maximum power point

Abstract: A thorough investigation was performed on various chemicals and nanocomposite materials to apply antireflection coating on the PV panel intending to improve the solar cell efficiency by generating ...

Basic principles, fundamentals, and mechanisms of chalcogenide-based nanomaterials in photocatalytic reactions

Abstract: An abundant and largely available natural energy resource is sunlight, which possesses great potential in driving environment-friendly photochemical/photocatalytic reactions. The conversion of solar energy to chemical energy has been considered as one of the most prospective long-term solutions to solve global energy and environmental issues. The photocatalyst is the key to realize such a conversion. Common photocatalytic materials include metal-free organic compounds and semiconductors, in which most of the interest has been focused on the semiconductor system. A photocatalyst employs the catalyst for speeding up chemical reactions in the presence of light. Significant features of the photocatalytic systems are proper bandgap, the morphology of the material, more exposed surface area, stability, and its reusability. Photocatalysis is widely being practised for the degradation and mineralization of hazardous organic compounds to CO2 and H2O. Thus, leads to the reduction of toxic metal ions into nontoxic states, deactivate and destruct all the waterborne microorganisms, decomposes the air pollutants like NO2, CO2, and NH3, degraded the waste plastics and green synthesis of industrially important chemicals. The term chalcogen applies to a few elements (O, S, Se, Te, and Po), the compounds formed by these elements are known as chalcogenides and also some chalcogenide metals (ZnS, CdS, and CdSe) can be used as photocatalysts, which is an area of present-day intensive research. ZnO and TiO2 are the most commonly used metal oxides for photocatalytic and sensing purposes, due to their outstanding properties and potential electronic communicator. Semiconducting nano metal oxides (NMOs) play an important role in developing smart materials that are highly efficient for sensing and simultaneously decontaminate harmful chemicals in our environment. As the material loading plays an important role in photocatalytic performances, physical mixture through grounding is the most straightforward approach to realize transition metal oxide and chalcogenide (TMO&Cs) based heterojunctions. In this chapter, the authors discussed the unique properties, significance of chalcogenide-based nanomaterials, principles and fundamentals as photocatalysts. Methods of synthesis like sol-gel method, ultrasonic method, hydro (solvo) thermal method, surfactant-thermal method, and in-situ photo-assisted deposition method, and other nonconventional synthesis methodologies, and mechanisms of chalcogenide-based nanomaterials as photocatalysts were also discussed along with their applications.

Transgenic Finger Millet [ Eleusine coracana (L.) Gaertn.] for Crop Improvement

Abstract: Finger millet [Eleusine coracana (L.) Gaertn.] is a nutritionally enriched member of the Poaceae family and sixth most important cereal crop. The crop is mostly cultivated throughout Asia, Africa, and South America. Finger millet is a rich source of minerals, vitamins, dietary fibers, and proteins as compared to other millets. The crop has a diverse gene pool with distinct features and genetic variations. It has several advantages of nutritional quality and quantity, health benefits, and abiotic and biotic stress adaptation over other cereals. Sustainable crop improvement is one of the critical tasks in the present-day plant breeding programs. Conventional methods of plant breeding have improved the crop yields, but have their limitations. In such a scenario, targeted and less time-consuming molecular marker-assisted breeding and genetic engineering-based tools and techniques are encouraged. In this chapter, we have discussed some of the transgenics developed in finger millet for crop improvement.

Multi-Objective Optimal Power Flow Using Metaheuristic Optimization Algorithms With Unified Power Flow Controller to Enhance the Power System Performance

Abstract: In this chapter a multi objective optimal power flow (OPF) is obtained by using latest Metaheuristic optimization techniques BAT search algorithm (BAT), cuckoo search algorithm (CSA) and firefly algorithm (FA) with Unified power flow controller (UPFC). UPFC is a voltage source converter type Flexible Alternating Current Transmission System (FACTS) device. It is able to control the voltage magnitudes, voltage angles and line impedances individually or simultaneously. To enhance the power system performance, the optimal power flow has been incorporated UPFC Multi-Objective Optimal Power Flow Using Metaheuristic Optimization Algorithms With Unified Power Flow Controller to Enhance the Power System Performance

Coincidence point results of nonlinear contractive mappings in partially ordered metric spaces

Abstract: In this paper, we proved some coincidence point results for \(f\)- nondecreasing self-mapping satisfying certain rational type contractions in the context of a metric space endowed with a partial order. Moreover, some consequences of the main result are given by involving integral type contractions in the space. Some numerical examples are illustrated to support our results. As an application, we have discussed the existence of a unique solution of integral equation.