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: Control theory & CMOS. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.

Design and implementation of automated regenerative braking of electric/hybrid electric vehicle

Abstract: The hybrid electric vehicle (HEV) has become one of the most promising vehicles in the automobile industry due to its energy saving ability and low emission of harmful pollutants. An HEV can recover energy from the wheels, which had been wasted in the past, and reuse it to propel the vehicle at low speeds during high acceleration. The technology used depends on the goals set for the vehicle, which includes fuel efficiency, power, driving range, or reduced greenhouse gas emissions. The proposed project deals with the design, fabrication and testing of control logic circuit for regenerative braking of hybrid electric vehicle, by using multi–quadrant DC chopper (MQDC) with MOSFETs acting as switches. Monostable multi–vibrator is being used for firing the MOSFETs. The triggering for monostable multi–vibrator is provided by using the square wave generator. Micro–processor is interfaced with hardware circuit to show various modes of HEV. To realise this logic, a dedicated software programme has been developed in 'C' language.

DHA-Rich Algae Oil Is a Safe and Effective Vegetarian Source of Omega-3

Abstract: Algal source of omega-3s is good for supplementation of DHA and DPA that mediate to sustain our vascular health. The ratio of DHA and DPA between breast milk and micro algae is comparable and found safe. Hence, supplementation as a component of food is now being accepted at all levels. That option has proven safe for vegetarians, type 2 diabetics, the elderly, and those with fish allergies. DHA is also recommended for pregnant and nursing mothers as a supplement, especially during the 3rd trimester and when nursing. Imperatively, the omega-3 bond can be a powerful co-therapy.

Influence of different pathways of regeneration on genetic and phytochemical instability of Curculigo orchioides

Abstract: Micropropagated plants of Curculigo orchioides Gaertn. through five different modes of regeneration were evaluated for their genetic stability and major flavanoids content that contribute to medicinal properties of the rhizome. Leaf explants that produced callus and bulbils have produced plantlets at a higher frequency. However, direct regeneration of plants from leaf tissues without intervening callus produced a low frequency of plantlets. Explants of rhizome produced healthy plantlets directly from the terminal part of the explant. Plantlets regenerated through five different modes of regeneration did not show any morphological variation. The duration of regeneration was varying from 60 to 145 days depending upon the type of the explant. Analysis of genomic DNA among the plantlets regenerated through five different modes of micropropagation revealed about 66% polymorphism. Major flavanoids such as rutin, ferulic acid, caffeic acid, quercitrin that contributed to medicinal properties of the rhizomes differed quantitatively among the plantlets regenerated through different pathways. Present study suggests that plantlets regenerated directly from the rhizome as well as from the leaf tips of in vitro grown plants are stable genetically and phytochemically. Plant Tissue Cult. & Biotech. 24(2): 173-189, 2014 (December)

Numerical analysis for steady boundary layer flow of Maxwell fluid over a stretching surface embedded in a porous medium with viscous dissipation using the spectral relaxation method

Abstract: In the current paper, a theoretical analysis is laid out to explore the features of flow, heat and mass transfer characteristics of Maxwell fluid over a stretching sheet, which can be embedded in a...

Social and Cultural Factors Influence on English Speaking Abilities

Abstract: Social and cultural factors assume a huge job in learning climate. The speaker foundation assumes an indispensable job in English speaking skills, and it could be a dialect capacity that is horrifying by social and cultural segments. The researcher utilized the technique to hold the majority of the improvement occurred inside the class in regular settings and conjointly to gauge the speaking troubles experienced by technical course aspirants. This examination focuses on the impact of socio-cultural factors on the English-speaking abilities and it comprises observations, interviews, unstructured meetings, and surveys. The combination of different culture foundation students took part and accepted the need for social air and cultural support, which can empower the dimension of English expressive knowledge because they feel unsure while communicating. This examination is to discover useful inputs for learners, parents, and educationists to upgrade the procedures of instruction and figuring out ways to improve speaking abilities in English.