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Jain S.K.,SDMCET | Pellenq R.J.-M.,Massachusetts Institute of Technology | Pellenq R.J.-M.,Aix - Marseille University | Gubbins K.E.,North Carolina State University | Peng X.,Beijing University of Chemical Technology
Langmuir | Year: 2017

Realistic molecular models of silica-templated CMK-1, CMK-3, and CMK-5 carbon materials have been developed by using carbon rods and carbon pipes that were obtained by adsorbing carbon in a model MCM-41 pore. The interactions between the carbon atoms with the silica matrix were described using the PN-Traz potential, and the interaction between the carbon atoms was calculated by the reactive empirical bond order (REBO) potential. Carbon rods and pipes with different thicknesses were obtained by changing the silica-carbon interaction strength, the temperature, and the chemical potential of carbon vapor adsorption. These equilibrium structures were further used to obtain the atomic models of CMK-1, CMK-3, and CMK-5 materials using the same symmetry as found in TEM pictures. These models are further refined and made more realistic by adding interconnections between the carbon rods and carbon pipes. We calculated the geometric pore size distribution of the different models of CMK-5 and found that the presence of interconnections results in some new features in the pore size distribution. Argon adsorption properties were investigated using GCMC simulations to characterize these materials at 77 K. We found that the presence of interconnection results greatly improves the agreement with available experimental data by shifting the capillary condensation to lower pressures. Adding interconnections also induces smoother adsorption/condensation isotherms, and desorption/evaporation curves show a sharp jump. These features reflex the complexity of the nanovoids in CMKs in terms of their pore morphology and topology. © 2017 American Chemical Society.

Nayana,NMAMIT | Chakrasali R.L.,SDMCET
IEEE International Conference on Innovative Mechanisms for Industry Applications, ICIMIA 2017 - Proceedings | Year: 2017

Grid connected operation of Distributed generation (DG) is yet another approach to provide reliable and secured power. The operational issues of grid connected DG is the focus of research at present to achieve adequacy and security. The islanding is the situation where DG continues to operate with the utility disconnected. It is customary to detect islanding when it occurs to ensure continued stable operation along with safety of linemen and the customers' equipment. This paper deals with the DC source based DG integrated with the utility and operates in grid connected and intentional islanding mode. Passive islanding detection technique is used to detect the islanding. The DG operates at grid voltage and frequency. Intentional islanding is tested by developing the model for seamless operation using MATLAB/Simulink environment and results are obtained. The simulation results validate the effective operation of the proposed controller and power electronic devices. © 2017 IEEE.

Peng X.,Beijing University of Chemical Technology | Jain S.K.,SDMCET
Molecular Simulation | Year: 2017

We perform a molecular simulation study on adsorption and separation of the noble gases Xe and Kr in silica-templated amorphous mesoporous carbons (CMK) materials. We generate the atomic models of CMK-3 and CMK-5 materials by adsorbing carbon in a model MCM-41 pore. Our carbon structures can capture the surface roughness and the disordered nature of the carbon rods and carbon pipes as reported in the experiment. The adsorption isotherms and isosteric heats of pure gases have been examined further. We find that the existence of the carbon interconnections between nanorods for CMK-3 and between nanopipes for CMK-5 will reduce the excess uptakes of the noble gases, whereas the isosteric heats are favoured in the materials with interconnections. The carbon interconnections are not advantageous to the adsorption storage of pure gases, but they can improve the separation ability of Xe for gas-mixture adsorption. The effects of temperature and concentration on the Xe separation are investigated and it is shown that the selectivities of Xe in the CMK-5 materials are insensitive to the two factors. We also find that both gas storage and separation of CMK materials are comparable to IRMOF-1 and UMCM-1 metal-organic frameworks. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Kulkarni K.,SDMCET | Murgod A.,SDMCET | Parvati V.,SDMCET
2017 IEEE 5th International Conference on Serious Games and Applications for Health, SeGAH 2017 | Year: 2017

Haptics and robotics are widely growing technologies of 21 century. Robots of present days are being used in the fields which are secluded from the human society; they face major short comings because of their limited abilities to interact with humans, to fill this void the proposed system uses haptics technology which provides a tactile feedback to give the feel of touch, sense and force. The main objective of this project is to design and develop the robotic arm that is controlled by haptics glove for virtual environment capable of haptic interaction. Without risking human limbs. The proposed system has applications in many areas including robotic medical surgery, rehabilitation, and exploration of harmful or remote environments, enabling technologies, defense application and education. © 2017 IEEE.

Pandit N.,Bangalore Electricity Supply Company | Chakrasali R.L.,SDMCET
IEEE International Conference on Innovative Mechanisms for Industry Applications, ICIMIA 2017 - Proceedings | Year: 2017

Transformers play an important role in a power distribution utility. They have a long life of 25 to 30 years; but they fail in large numbers, within 3 years itself, due to various reasons, causing huge economic and service impact on the distribution utilities as well the power consumers. In this paper, causes of failure of distribution transformers and possible solutions to overcome these problems have been discussed. Some of the problems may be particular to distribution utilities of Karnataka state, but most of them are generally, Indian problems. © 2017 IEEE.

Pujari K.S.,KLS VDRIT | Patil D.V.,SDMCET
Lecture Notes in Mechanical Engineering | Year: 2017

This works mainly pertains to improvement in the mechanical properties of AA 7075-T6 aluminium alloy welds through gas tungsten arc welding (GTAW) process. Design of experimental technique Taguchi was applied to optimize GTAW process parameters of AA 7075-T6 aluminium alloy welded joints for improving the mechanical properties. Mathematical model was developed by Regression. Adequacy of developed model was checked by analysis of variance. The effect of heat treat on mechanical properties was also studied and an improvement in the mechanical properties was observed. Metallography of heat treated and non-heat treated welded joints correlated with the mechanical properties. © Springer Science+Business Media Singapore 2017.

Rodd S.F.,Gogte Institute of Technology | Kulkarni U.P.,SDMCET | Yardi A.R.,Walchand College
Evolving Systems | Year: 2013

A recent trend in database performance tuning is towards self tuning for some of the important benefits like efficient use of resources, improved performance and low cost of ownership that the auto-tuning offers. Most modern database management systems (DBMS) have introduced several dynamically tunable parameters that enable the implementation of self tuning systems. An appropriate mix of various tuning parameters results in significant performance enhancement either in terms of response time of the queries or the overall throughput. The choice and extent of tuning of the available tuning parameters must be based on the impact of these parameters on the performance and also on the amount and type of workload the DBMS is subjected to. The tedious task of manual tuning and also non-availability of expert database administrators (DBAs), it is desirable to have a self tuning database system that not only relieves the DBA of the tedious task of manual tuning, but it also eliminates the need for an expert DBA. Thus, it reduces the total cost of ownership of the entire software system. A self tuning system also adapts well to the dynamic workload changes and also user loads during peak hours ensuring acceptable application response times. In this paper, a novel technique that combines learning ability of the artificial neural network and the ability of the fuzzy system to deal with imprecise inputs are employed to estimate the extent of tuning required. Furthermore, the estimated values are moderated based on knowledgebase built using experimental findings. The experimental results show significant performance improvement as compared to built in self tuning feature of the DBMS. © 2013 Springer-Verlag Berlin Heidelberg.

Biradar S.R.,SDMCET | Jain G.,University of Rajasthan
Advances in Intelligent Systems and Computing | Year: 2015

With the evolution of wireless sensor network, the interests in their application have increased considerably. The architecture of the system differs with the application requirement and characteristics. Now days there are number of applications in which hierarchal based networks are highly in demand and key concept of such network is clustering. Some of the most wellknown hierarchical routing protocols like LEACH, SEP, TEEN, APTEEN and HEED are discussed in brief. These different conventional protocols have diverse strategies to select their cluster head but still have some limitations. Based on the limitations of these conventional models, a new approach has been proposed on the basis of ranks and weights assignment based protocol known as RWBP. This approach considers not only residual energy but also node’s degree and distance of nodes with base station. The node which has higher weight will be chosen as a cluster head. The objective of this approach is to have balance distribution of clusters, enhance lifetime and better efficiency than traditional protocols. The same approach is also applied for multi hop clustering i.e. multi hop RWBP in which the sensing field is divided into more number of areas and the area which lie farther from the base station is sending indirectly via intermediate cluster heads to the base station. The simulations are done in MATLAB with the network size 100x100 meters. The results of the proposed approach are resulting in better lifetime and stability region as compared to LEACH and SEP. © Springer International Publishing Switzerland 2015.

Geomorphological characteristics can be treated as signatures of hydrological responses. Geomorphologic instantaneous unit hydrograph (GIUH) is of utmost use in planning watershed management programs on a broad scale in absence of hydrologic data. Fifth order basins from different agroclimatic zones in the Varada River basin were selected to understand the spatial variation in drainage characteristics. These sub-basins show significant differences in their morphometric properties such as basin area, drainage density, bifurcation ratio, circularity ratio, constant of channel maintenance etc. These differences reflect variation in the hydrological process and geomorphologic instantaneous unit hydrograph (GIUH) of different sub-basins and can be used to understand watershed management aspects. Fifth order sub-basin in the Southern Transition agroclimatic zone is potential for artificial recharge programs. Sub-basins in the Hilly non-forest zone on the north are ideal for surface water storage like tank development program while Forested Hilly zone on the north are environmentally sensitive and prone to erosion. © 2011 Elsevier B.V.

Hemadri V.B.,SDMCET | Kulkarni U.P.,SDMCET
Communications in Computer and Information Science | Year: 2013

Use of technology in building human comforts and automation is growing fast, particularly in automobile industry. Safety of human being is the major concern in vehicle automation. Statistics shows that 20% of all the traffic accidents are due to diminished vigilance level of driver and hence use of technology in detecting drowsiness and alerting driver is of prime importance. In this paper, method for detection of drowsiness based on multidimensional facial features like eyelid movements and yawning is proposed. The geometrical features of mouth and eyelid movement are processed, in parallel to detect drowsiness. Harr classifiers are used to detect eyes and mouth region. Only the position of lower lip is selected to check for drowsiness as during yawn only lower lip is moved due to downward movement of lower jaw and position of the upper lip is fixed. Processing is done only on one of the eye to analyze attributes of eyelid movement in drowsiness, thus increasing the speed and reducing the false detection. Experimental results show that the algorithm can achieve a 80% performance for drowsiness detection under varying lighting conditions. © 2013 Springer-Verlag Berlin Heidelberg.

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