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Institution

Vignan University

EducationGuntur, Andhra Pradesh, India
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.


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Book ChapterDOI
01 Jan 2018
TL;DR: Various existing clustering methods which are suitable for large, semi-structured, and unstructured data and how they can apply same algorithms in distributed environment/hadoop are studied.
Abstract: In modern applications, clustering algorithms have been emerged learning aid to generate and analyze the huge volumes of data. The foremost clustering objective is to classify same type of data has been grouped with in the same Cluster while they are similar according to precise metrics. For various applications, clustering is one of the techniques to classify and analyze the large amount of data. On the other hand, the main issues of applying clustering algorithms for big data that causes uncertainty among the practitioners require consent in the definition of their properties in addition to be deficient in proper classification. In this paper, we studied various existing clustering methods which are suitable for large, semi-structured, and unstructured data and how we can apply same algorithms in distributed environment/hadoop.

20 citations

Journal ArticleDOI
TL;DR: In this article, the strength performance of geopolymer concrete (GC) with different proportions of fly ash and ground granulated blast furnace slag is presented. And the potential of GC against acid resistance, porosity, water absorption and sorptivity is presented in this paper.
Abstract: A geopolymer binder is measured as an alternative and elective material to customary Portland binders. Utilization of Fly ash (FA) as a primary binding material limits the waste creation of thermal power stations and reduces environmental impacts. This paper presents the strength performance of geopolymer concrete (GC) with different proportions of FA and ground granulated blast furnace slag. The potential of GC against acid resistance, porosity, water absorption, and sorptivity is presented in this paper. Apart from this, rapid chloride penetration test was performed to assess the chloride resistance of GC. XRD and SEM analysis was done on selected samples of GC to categorize microstructural performance. The results depicted that mixes M5 and M10 have attained higher compressive strengths, i.e., 49.0 and 57.6 MPa, while the acid durability loss factor values are less by 28% and 19%, respectively compared to other mixes of GC.

20 citations

Journal ArticleDOI
TL;DR: In this article, a brief overview of nitrogen-doped nanocarbons (NNCs) is provided highlighting their significance and sustainable prospects, and their wide-ranging applications show promises towards substituting the processes, which normally utilize expensive, scarce and hazardous materials.
Abstract: The current and estimated energy demand and their potential sources of supply indicate a daunting future for humanity on the planet unless sustainable solutions are developed. The scarcity, high cost and the potential environmental and health concerns related to widely used noble-metals make the situation even worse. Thus, active participation from scientific and industrial communities is essential to replace noble-metal (or any metal) based processes with more sustainable alternatives. In that context, recent developments in heteroatom-doped (especially nitrogen) nanocarbons and their wide-ranging applications show promises towards substituting the processes, which normally utilize expensive, scarce and hazardous materials. Herein, a brief overview of nitrogen-doped nanocarbons (NNCs) is provided highlighting their significance and sustainable prospects.

20 citations

Journal ArticleDOI
TL;DR: The development and validation of a self-powered, simple connect, IoT solution to monitor the unfilled level of trash bins from a central monitoring station is presented and the developed trash bins can be suitable for smart cities.
Abstract: Improper disposal of solid waste that impacts human health and pollutes the environment, arising a need for successful and necessary collection of waste materials. However, most trash bins placed in cities can be seen overflowing due to traditional or inefficient waste management approaches. Therefore, a real-time remote monitoring system is needed to alert the level of garbage in bins to the relevant authority for immediate waste clearance. This paper presents the development and validation of a self-powered, simple connect, IoT solution to monitor the unfilled level of trash bins from a central monitoring station. The end sensor nodes of the developed IoT system are called Bin Level Monitoring Unit (BLMU) which are installed in every trash bin where the unfilled level needs to be monitored. Every BLMU measures the unfilled level of the trash bins and transmits it to a wireless access point unit (WAPU). Each WAPU receives the unfilled level data from several BLMUs and uploads it to the central server for storage and analysis. The waste collection authority can view and analyze the unfilled level of each bin using a smart graphical user interface. The following important experiments were carried out to validate the developed system: (1) the developed bin level monitoring system was tested by filling a trash bin with solid waste at various levels, and the corresponding unfilled level of the trash bin was monitored using the smart graphical user interface. (2) The life expectancy of the BLMU was evaluated as approximately 434 days. (3) The maximum transmission distance between a BLMU and a WAPU is 119 m. (4) The cost of a developed trash bin is 107 USD. Based on the results achieved, the developed trash bins can be suitable for smart cities.

20 citations

Journal ArticleDOI
TL;DR: In this article, the feasibility of low cycle fatigue effects on the thermo-mechanical fatigue evolution in the solder joints of a power module was demonstrated by simulation and experimental studies.
Abstract: This paper demonstrates the feasibility of low cycle fatigue effects on the thermo-mechanical fatigue evolution in the solder joints of a power module. To achieve this goal, finite-element method (FEM) simulation and experimental studies have been carried out. One of the prepared samples was exposed to the sole thermal cycling while another one underwent frequent drop impacts, as an indicator of low cycle fatigue event, during the thermal cycling. The FEM results indicate that the thermal cycling leads to the accumulated creep strain in the solder joints. The amount of creep strain considerably increases when the drop impacts are coupled to the thermal cycling. This phenomenon is due to the additional peeling stress applied by drop impacts to the solder joints. It is also revealed that with an increase in the number of drop impacts, the rate of strain accumulation declines which may be due to the restriction of changes led by stress triaxiality. The fractography also validates that the sample exposed to both drop and thermal loadings shows an entire brittle fracture mode. Moreover, the EDS map shows that the elemental distribution heterogeneity and intermetallic growth were created under mutual effects of drop impacts and thermal cycle fatigue.

20 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202322
202231
2021352
2020254
2019250
2018159