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Panchal B.M.,Dr. Babasaheb Ambedkar Marathwada University | Dhoot S.B.,Nurture Earth Research and Development Pvt. Ltd. | Deshmukh S.A.,Nurture Earth Research and Development Pvt. Ltd. | Sharma M.R.,Marathwada Institute of Technology | Kachole M.S.,Dr. Babasaheb Ambedkar Marathwada University

The transesterification of Pongamia pinnata seed oil with dimethyl carbonate (DMC) for preparing DMC-BioD has been studied at the catalysis of potassium hydroxide (KOH). The effects of reaction conditions (ratio of P. pinnata seed oil and DMC, catalyst amount and reaction time, reaction temperature and agitation speed) on DMC-BioD yield were investigated. The highest DMC-BioD yield could reach 96% at refluxing temperat ure for 6 h with ratio of P. pinnata oil to DMC 1:3 w/w and 4% KOH (based on oil weight). Percentage of conversion has been analyzed by Gas Chromatography. P. pinnata seed oil DMC-BioD produced is characterized for the properties such as the kinematic viscosity at 40°C, density at 25°C, flash point (FP), pour point (PP), cloud point (CP), acid value and copper strip corrosion. P. pinnata seed oil DMC-BioD produced met with the quality standards defined under ASTM D675-02. © 2013 Elsevier Ltd. All rights reserved. Source

Dahake A.G.,Marathwada Institute of Technology
Indian Concrete Journal

An experimental investigation to study the effect on shear test of steel fibers and polymer latex in concrete is studied. Varying volume fraction of steel fibers from 0% to 7% at the interval of 1% of fiber and SBR latex polymer of fixed volume of 15% by weight of cement were used. Prisms of size 150 mm× 150 mm× 700 mm, double L-type blocks of size 150 mm × 150 mm × 450 mm were prepared. The larger broken part of specimen after the flexure test was used for double shear test. Push-off shear test and double shear test on grooved specimens were carried out. Source

Gogte C.L.,Marathwada Institute of Technology | Peshwe D.R.,Visvesvaraya National Institute of Technology | Paretkar R.K.,Visvesvaraya National Institute of Technology
AIP Conference Proceedings

The presence of cobalt in high speed steels is of great interest to researchers and the users as well. Although cobalt bearing high speed steels are used on commercial basis, the influence of cobalt in cryogenically treated high speed steels is still under scanner. Some researchers have found the effect of cobalt as negative, as it adversely affects the wear properties and fracture toughness of some high speed steels under certain conditions. This paper takes a review of influence of cobalt in tool steels with the past research and discusses the experimental results of the effect of cryogenic treatment on 10%Co bearing AISI T42 high speed steel. It has been found that this steel has an advantage due to the presence of Cobalt with respect to wear characteristics after the cryogenic treatment. It is also found that the cycle time of cryogenic processing of this super high speed steel shortens due to the presence of cobalt. © 2012 American Institute of Physics. Source

Lakhekar G.V.,H+ Technology | Saundarmal V.D.,Marathwada Institute of Technology
IEEE International Conference on Fuzzy Systems

This paper presents a novel approach to the design of an adaptive fuzzy sliding mode controller for depth control of an autonomous underwater vehicle (AUV). So far, AUV's dynamics are highly nonlinear and the hydrodynamic coefficients of the vehicles are difficult to estimate, because of the variations of these coefficients with different operating conditions. These kinds of difficulties cause modeling inaccuracies of AUV's dynamics. So that, an adaptive fuzzy sliding mode control with novel fuzzy adaptation technique is proposed for regulating vertical positioning in presence of parametric uncertainty and disturbances. In this approach, two fuzzy approximator are employed in such a way that slope of the linear sliding surface is updated by first fuzzy approximator, to shape tracking error dynamics in the sliding regime, while second fuzzy approximator change the supports of the output fuzzy membership function in the defuzzification inference module of fuzzy sliding mode control (FSMC) algorithm. Simulation results shows that, the reaching time and tracking error in the approaching phase can be significantly reduced with chattering problem can also be eliminated. The effectiveness of proposed control strategy and its advantages are indicated in comparison with conventional sliding mode control and FSMC technique. © 2013 IEEE. Source

Dholi P.R.,Marathwada Institute of Technology | Chaudhari K.P.,Marathwada Institute of Technology
Communications in Computer and Information Science

Biometric authentication is individual characteristics that cannot be used by imposter to penetrate secure system. Keystroke dynamics based authentication verifies user from their typing pattern. To authenticate user based on their typing samples, it is required to find out he resemblance of a typing samples of user regardless of the text typed. Key event timing is extracted from key features Latency, Dwell time, Key interval, Up to up, Flight time and standard are measure in the form of FAR, FRR and ER. In this paper we introduces a k-nearest neighbor approach to classify users' keystroke dynamics profiles. For authentication, an input will be checked against the profiles within the cluster which has significantly reduced the verification load. © 2013 Springer-Verlag. Source

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