Acharya Institute of Technology

Bangalore, India

Acharya Institute of Technology

Bangalore, India
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Narasimha Murthy M.S.,Acharya Institute of Technology | Suma V.,Dayananda Sagar College of Engineering
Proceedings of the International Conference on Inventive Computation Technologies, ICICT 2016 | Year: 2017

In current scenario, software industries are moving towards cloud computing environment for many reasons, one such reason is, testing the applications in cloud environment such that, they can stay in a very competitive IT market by satisfying the customer need as for as testing is considered. In this paper a data analysis is made on the application by considering traditional regression testing environment and cloud environment. It is observed that, the cloud testing environment has many advantages over traditional environment with respect to various parameter such as response time, amount of effort invested, number of defects captured, number of defects escapes.


Madhusudhan M.,Acharya Institute of Technology | Naveen G.J.,Vivekananda Institute of Engineering and Technology | Mahesha K.,Vivekananda Institute of Engineering and Technology
Materials Today: Proceedings | Year: 2017

Metal Matrix Composites are significantly contributing towards important role in engineering applications and are in the forefront of significant research in present day due to their scientific and technical advantages. Particle or discontinuously reinforced MMCs are relatively inexpensive and are found to possess specific properties compared to fiber reinforced MMCs. Among the various types of particulate reinforcements such as silicon nitride, boron nitride, silicon carbide, titanium carbide, boron carbide and alumina, extensive research has been directed toward the development of zircon particle reinforcement. Zircon reinforced composites are preferred as these composites exhibit relatively high refractoriness, excellent resistance to abrasion, thermal shock and chemical attack compared to composites reinforced with other reinforcements. The present paper aims the investigation on influence of reinforced particles ZrO2 on mechanical properties of aluminum alloy (AA7068) composites which is developed by stir casting technique. The castings produced were machined and samples were fabricated by varying weight percentage of the reinforced particles as 0, 2, 4, 6, and 8 Wt% in volume. SEM and microstructural studies were carried out on all composites and fractured surface of tensile specimens. Microstructural study reveals uniform distribution of reinforcement ZrO2 particles in as cast and AA7068 metal matrix composites. Significant improvement in Hardness and Tensile strength was found with increase in Zirconium di oxide particles in weight percentage of composites. As expected, the percentage elongation diminished with increased weight percentage of reinforcement in the aluminum matrix. © 2017 Elsevier Ltd. All rights reserved.


Phanibhushana M.V.,Amrita University | Chandrappa C.N.,Acharya Institute of Technology | Niranjan H.B.,Sambhram Institute of Technology
Materials Today: Proceedings | Year: 2017

Metal Matrix Composites (MMCs) are used in aerospace, transport, automotive, marine engineering due to their light weight with improved strength, stiffness and wear resistance. Wear is one of the reasons for the failure of the machine components. It is difficult to accurately predict the life of components due to wear, because, generally the wear rates are largely scattered. An attempt is made to study the Wear characteristics of Hematite (Fe2O3) reinforced Aluminum 6061 Metal Matrix Composites. The reinforcement is added in particulate form of 40-45 μm with an increment of 2% from 0% to 8% (by weight). Composites are fabricated by liquid metallurgy technique. The Microstructural study on as cast Al6061-Fe2O3 compositesreveals uniform distribution of reinforcement particles. The wear test was conducted on the specimens by varying speed from 200 - 400 rpm & load from 50 - 100 N. The wear rate was measured by the weight loss of the specimen. The results show that there is an increase in the wear resistance with increase in percentage of reinforcement. The wear factor has decreased 30 - 40% at 8% of reinforcement as compared to base matrix material. © 2017 Elsevier Ltd. All rights reserved.


Sathishkumar S.,T John Institute Of Technology | Suresh A.V.,BMS College of Engineering | Nagamadhu M.,Acharya Institute of Technology | Krishna M.,Rashtreeya Vidyalaya College of Engineering
Materials Today: Proceedings | Year: 2017

The untreated jute fibre mat has the affinity for the absorption of moisture, resulting in increase in wettability and the thickness of the fiber. The diameter of the weaving thread diameter is around 1.24 -1.25mm. Due to moisture the bonding between the fibers and matrix are poor and hydrophobic matrices weight is more. So it is necessary to reduce the moisture content by giving the alkali treatment solution taken as pre-treated using NaOH solution. At different exposure times 0,1,2,3,4,5,6 and 7hr dried in hot air oven temperature 100°C and kept at 2days room in temperature 30°C.The untreated and treated jute fiber mat were used as reinforcing agent of vinyl ester resin composites by vacuum bag method with a number of 4plies laminate prepared in the ratio of 60:40. The effect of the stacking sequence is in the form of unidirectional long fibers or randomly short fiber. The alkali treatment on the static mechanical properties was evaluated showing that the higher moduli in comparison to the neat resin. The strength properties, only the composite reinforced with unidirectional layers show higher strength than the plain resin. Higher concentration alkali treatment showed increased improvement of fiber mat matrix compatibility. The degree crystallanity and other properties determined by X-ray diffraction, DSC analysis SEM. By conducting all the test shows the better fiber matrix interface adhesion caused due to the fiber surface treatment by alkali. © 2017 Elsevier Ltd. All rights reserved.


Phanibhushana M.V.,Mrita Vishwa Vidyapeetham | Chandrappa C.N.,Acharya Institute of Technology | Niranjan H.B.,Sambhram Institute of Technology
Materials Today: Proceedings | Year: 2017

Metal Matrix Composites (MMCs) are used in aerospace, transport, automotive, marine engineering due to their light weight with improved strength, stiffness and wear resistance. Wear is one of the reasons for the failure of the machine components. It is difficult to accurately predict the life of components due to wear, because, generally the wear rates are largely scattered. An attempt is made to study the Wear characteristics of Hematite (Fe2O3) reinforced Aluminum 6061 Metal Matrix Composites. The reinforcement is added in particulate form of 40-45 μm with an increment of 2% from 0% to 8% (by weight). Composites are fabricated by liquid metallurgy technique. The Microstructural study on as cast Al6061-Fe2O3 compositesreveals uniform distribution of reinforcement particles. The wear test was conducted on the specimens by varying speed from 200 - 400 rpm & load from 50 - 100 N. The wear rate was measured by the weight loss of the specimen. The results show that there is an increase in the wear resistance with increase in percentage of reinforcement. The wear factor has decreased 30 - 40% at 8% of reinforcement as compared to base matrix material. © 2017 Elsevier Ltd. All rights reserved.


Prashantha S.C.,East West Institute of Technology | Nagabhushana H.,Tumkur University | Sharma S.C.,BMS College of Engineering | Nagabhushana B.M.,M.S. Ramaiah Institute of Technology | And 2 more authors.
Sensors and Actuators, B: Chemical | Year: 2014

A simple and low-cost solution combustion method was used to prepare Eu3+ (1-11 mol%) doped Mg2SiO4 nanophosphors at 350 C using metal nitrates as precursors and ODH (Oxali di-hydrazide) as fuel. The final products were well characterized by powder X-ray diffraction (PXRD), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and UV-visible absorption (UV-Vis). The PXRD patterns of the as-formed products show single orthorhombic phase. The crystallite size was estimated using Scherrer's method and found to be in the range 20-25 nm. The effect of Eu3+ cations on the luminescence properties of Mg2SiO 4:Eu3+ nanoparticles were understood from the luminescence studies. The phosphors exhibit bright red emission upon 393 nm excitation. The characteristic emission peaks recorded at ∼577, 590, 612, 650 and 703 nm (5D0 → 7FJ=0,1,2,3,4) were attributed to the 4f-4f intra shell transitions of Eu3+ ions. The intensity of red emission was found to be related with the concentration of intrinsic defects, especially oxygen-vacancies, which could assist the energy transfer from the Mg2SiO4 host to the Eu3+ ions. The Commission International De I-Eclairage (CIE) chromaticity co-ordinates were calculated from emission spectra, the values (x,y) were very close to National Television System Committee (NTSC) standard value of red emission. Therefore, the present phosphor was highly useful for display applications. © 2014 Elsevier B.V.


Simsek Y.,Akdeniz University | Bayad A.,DeVry University | Lokesha V.,Acharya Institute of Technology
Mathematical Methods in the Applied Sciences | Year: 2012

The aim of this paper was to derive new identities and relations associated with the q-Bernstein polynomials, q-Frobenius-Euler polynomials, l-functions, and q-Stirling numbers of the second kind. We also give some applications related to theses polynomials and numbers. Copyright © 2012 John Wiley & Sons, Ltd.


Sadashiv N.,Acharya Institute of Technology | Kumar S.M.D.,University Visvesvaraya College of Engineering
ICCSE 2011 - 6th International Conference on Computer Science and Education, Final Program and Proceedings | Year: 2011

Cloud computing is rapidly growing as an alternative to conventional computing. However, it is based on models like cluster computing, distributed computing, utility computing and grid computing in general. This paper presents an end-to-end comparison between Cluster Computing, Grid Computing and Cloud Computing, along with the challenges they face. This could help in better understanding these models and to know how they differ from its related concepts, all in one go. It also discusses the ongoing projects and different applications that use these computing models as a platform for execution. An insight into some of the tools which can be used in the three computing models to design and develop applications is given. This could help in bringing out the innovative ideas in the field and can be explored to the needs in the computing world. © 2011 IEEE.


Kempraj V.,33rd Cross | Bhat S.K.,Acharya Institute of Technology
Pesticide Biochemistry and Physiology | Year: 2011

The current study involved evaluation of the toxicity of acetone soluble fraction of the ethanol extract of Annona squamosa Linn. seeds on Aedes albopictus (Skuse). Toxicity of fresh sample has been compared with that of solar radiated and heat treated aliquots of the same. Acute toxicity of fresh acetone fraction on adults was evident with LC50 and LC90 values of 15.21 and 60.38μg/ml, respectively. Larvicidal bioassays recorded LC50 and LC90 values ranging from 0.44 to 5.97 and 1.64-43.36μg/ml, respectively for different instars. Ovicidal bioassays yielded EC50 and EC90 values of 18.82 and 69.61μg/ml. The study further revealed ovipositional deterrent and chemosterilant activities of the extract on the target mosquito. Bioassays using solar radiation and heat treated samples of the active fraction have showed toxicity levels similar to those of fresh sample. Chemical analysis of acetone soluble fraction of seed extract of A. squamosa has reveled ethyl oleate and iso-octyl phthalate as major components. Adulticidal, larvicidal, ovicidal, ovipositional deterrent and chemosterilant activities of the fraction on A. albopictus were proved. The investigation further confirmed stability of the active fraction on exposure to solar radiation and high temperature. © 2011 Elsevier Inc.


Pillai V.V.,Acharya Institute of Technology | Sreekanth B.,Acharya Institute of Technology
International Journal of Pharma and Bio Sciences | Year: 2013

The two new complexes Ag(L1)2L2(PF6)2[Complex (1) and Cu(L1)2L2(PF6)2[Complex (2)] containing bioactive mixed ligand of typeL1=8-Hydroxyquinoline and L2=1,10-Phenanthroline have been synthesized and characterized by analytical and spectral methods. The binding constant of the complexes in 5 mM Tris-HCl/50 mM NaCl buffer at pH 7.2, are 25.79 x 106 M-1and 9.95 x 106 M-1for complex (1) and (2) respectively. The synthesized compounds have been tested against microorganisms such as Gram positive bacteria (Staphylococcus aureus and Proteus vulgaris), Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and fungus (Aspergillus niger). A comparative study of the Minimum Inhibitory Concentration(MIC) values of the ligands and their complexes indicates that the complexes exhibit moderate antimicrobial activity than the free ligand and control.

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