Showing papers by "Sir Padampat Singhania University published in 2017"
TL;DR: Endophtyic fungi were found to be present in medicinal value plant C. procera and need to be explored further as potential source of novel natural antioxidant compound.
Abstract: Objective: To investigate the antioxidant activity of methanolic extract of endophytic fungi isolated from Calotropis procera plant. Methods: The endophytic fungi were isolated from explants of leaf, stem, and flower of C. procera on potato dextrose broth (PDB) medium. The fungal isolates were mass cultured in PDB. The methanolic extracts of these fungi were prepared and evaluated for the antioxidant activity by 1,1-diphenyl- 2-picryl-hydrazyl (DPPH) free radical scavenging assay and reducing power assay. The extracts were characterized for the presence of phenolics and flavonoids. Results: A total of 8 endophytic fungi were isolated from C. procera explants. Out of these 8 fungal isolates, the crude extracts of two fungi, i.e. CPIMR-2 and CPIL-1 showed positive antioxidant activity. From the morphological characteristics, the isolates CPIMR-2 and CPIL-1 were identified as Penicillium spp. and Aspergillus spp., respectively. Both the isolates were found to possess antioxidant potential with % inhibition value of 81.16% and 80.97% in the DPPH radical scavenging assay. The phytochemical screening of the methanolic extracts showed the presence of phenolics and flavonoids. The total flavonoids content in Penicillium species and Aspergillus species were found to be 130.50 μg/mg and 94.91 μg/mg of extracts, respectively. The total phenolic content was found to be 9.16 μg/mg and 12.13 μg/mg of extracts in Penicillium species and Aspergillus species, respectively. Conclusions: Endophtyic fungi were found to be present in medicinal value plant C. procera. The probable bioactive component for antioxidant activity possessed by the fungi would be the flavonoids and phenolics. These metabolite produced by endophytic fungi from C. procera need to be explored further as potential source of novel natural antioxidant compound. Keywords: Endophytes, Calotropis procera, Antioxidant, Radical scavenging, Reducing power, Flavonoids.
15 citations
15 Jul 2017
TL;DR: In this article, the effect of filler materials, test temperature on the tensile properties and moisture susceptibility characteristics of bituminous concrete mix prepared using stone dust and cement as filler materials was studied.
Abstract: Pavement engineers are too much concerned about the tensile properties of bituminous mix because of the problems associated with cracking. Hence tensile strength of bituminous concrete mix is important in pavement applications. The indirect tensile strength test is used to assess the tensile properties of the bituminous mix. The present research work, essentially emphasize to study the effect of filler materials, test temperature on the tensile properties and moisture susceptibility characteristics of bituminous concrete mix prepared using stone dust and cement as filler materials. For the preparation of bituminous concrete mix specimens using stone dust and cement as filler materials, optimum bitumen content was determined by adopting Marshall method of bituminous mix design. Bituminous mix properties were determined at optimum bitumen content. Indirect tensile strength (ITS) and Tensile strength ratio (TSR) of bituminous concrete mix were evaluated by varying test temperatures at 15 °C, 20 °C, 25 °C, 30 °C and 35 °C. Prediction model for Indirect tensile strength was developed by considering the temperature, Marshall stability and optimum bitumen content as independent variable for each filler material. As the test temperature increases the ITS and TSR values of bituminous concrete mix decreases irrespective of type of filler material. Based on the analysis of data, it was observed that at any test temperature, ITS and TSR values of bituminous concrete mix prepared using cement as filler material were higher when compared to bituminous concrete mix prepared using stone dust as filler material. It may be concluded that the behavior of bituminous concrete mix prepared using cement as filler material is superior in terms of mix properties, ITS and TSR.
8 citations
TL;DR: In this article, the authors presented a design and simulation of the GaN based thin film transistor using sentaurus TCAD for the extracting the electrical performance, the resulting GaN TFT exhibits good electrical performance in the simulated results, including, a threshold voltage of 12-15 V, an on/off current ratio of 6.5×10 7 ~8.3×10 8, and a sub-threshold slope of 0.44V/dec.
Abstract: As reported in past decades, gallium nitride as one of the most capable compound semiconductor, GaN-based high-electron mobility transistors are the focus of intense research activities in the area of high power, high-speed, and high-temperature transistors. In this paper we present a design and simulation of the GaN based thin film transistor using sentaurus TCAD for the extracting the electrical performance. The resulting GaN TFTs exhibits good electrical performance in the simulated results, including, a threshold voltage of 12-15 V, an on/off current ratio of 6.5×10 7 ~8.3×10 8 , and a sub-threshold slope of 0.44V/dec. Sentaurus TCAD simulations is the tool which offers study of comprehensive behavior of semiconductor structures with ease. The simulation results of the TFT structure based on gallium nitride active channel have great prospective in the next-generation flat-panel display applications.
6 citations
01 Feb 2017
TL;DR: In this paper, the authors evaluated a technology-based training for emergent cognitive skills in ASD children and found that ASD children after randomized trials became less impetuous, less restless and trivial.
Abstract: This analysis evaluates a technology-based training (TBT) for emergent of cognitive skills in ASD children. It primarily explores social competence in learning environment and attempts to enhance behavioral performances in social and cognitive interactions. To study the Autistic traits, 54 individuals suffering from ASD aged from 3 to 29 year were selected for experimental observation. Autistic kids were taught using multimedia tools like mobile applications and short stories. The Autistic traits like medical history and responses to prompts along with the results of discrete trials were recorded and analyzed using appropriate tools. It was observed that ASD children after randomized trials became less impetuous, less restless and trivial. The rise in mood constancy was also observed. Multimedia intrusion is found to be greatly successful in treating disorders like anxiety and autism.
4 citations
17 Apr 2017
TL;DR: In this paper, the forced and quadratically damped Duffing oscillator system was studied experimentally through an analogue circuit and the experimental results were compared with numerical simulation results.
Abstract: In this communication we study the forced and quadratically damped Duffing oscillator system experimentally through an analogue circuit. For this purpose we design a circuit and observe its dynamical behaviour under various sets of control parameters and also compare the experimental results with the numerical simulation results.
3 citations
TL;DR: A modified genetic algorithm with three parent crossover and a mutation operator is used to find the optimal solution of the loading and scheduling problem in a flexible manufacturing system which has identical machines and a common tool magazine.
Abstract: Scheduling problems in an FMS have been considered as complex optimization problems whose solution by conventional techniques requires a great deal of efforts and time. In this paper, a simultaneous loading and scheduling of part and tool has been proposed for a flexible manufacturing system which has identical machines and a common tool magazine. All the tools are stored in the common tool magazine, and shared among the different machines through a material handling system. Each tool type is single in number. A modified genetic algorithm (MGA) with three parent crossover and a mutation operator is used to find the optimal solution of the loading and scheduling problem. The MGA uses an algorithm which is based on Giffler and Thompson procedure with a heuristic approach to resolve the job conflict and generate an active feasible schedule. The performance of the proposed algorithm is analyzed by comparing the makespan results with the results existing in literature. It is observed that the MGA yields better results than the algorithms reported so far. Furthermore, efficiency of MGA improves as the problem size increases.
3 citations
TL;DR: The improved MPPT is able to reduce the number of oscillations and tracking time significantly before reaching the maximum power point (MPP) and has been implemented with a highly efficient boost converter.
Abstract: We report on an improved maximum power point tracking (MPPT) system based on a differential power algorithm. In the proposed algorithm, which is a modified form of a perturb and observe (P&O) algorithm, differential powers, as well as voltages at different time, are compared. The proposed algorithm has been implemented with a highly efficient boost converter, in which duty cycle of a switch is varied in such a way, that the power reaches a maximum at any instant of the day, irrespective of the environmental conditions. The improved MPPT is able to reduce the number of oscillations and tracking time significantly before reaching the maximum power point (MPP). The simulated I-V and P-V characteristic curves (individual and combined) of a solar PV module were generated in MATLAB.
1 citations
TL;DR: In this article, the results of triple differential cross sections (TDCSs) for electron impact ionization of inert gases for asymmetric final state energy sharing conditions have been studied in detail.
Abstract: The electron-impact ionization of inert gases for asymmetric final state energy sharing conditions has been studied in detail. However, there have been relatively few studies examining equal energy final state electrons. We report in this communication the results of triple differential cross sections (TDCSs) for electron impact ionization of Ar (3p) for equal energy sharing of the outgoing electrons. We calculate TDCS in the modified distorted wave Born approximation (DWBA) formalism including post collision interaction (PCI) and polarization potential. We compare the results of our calculation with available measurements [Phys. Rev. A 87, 022712 (2013)]. We study the effect of PCI, target polarization on the trends of TDCS for the single ionization of Ar (3p) targets.
1 citations
13 Oct 2017
TL;DR: The shape, shape subset, texture, texture subset of feature dataset as well as the combined dataset are quite exemplary and worth showcasing, and the combined shape and texture features can be a suitable alternative for improvement in predictive accuracy results.
Abstract: The process of taxonomic classification of plant species has been carried out by the botanist since centuries, by observing their roots, shoots and flowers. It is the age of modernization; roads, buildings and bridges are fast replacing the vegetation, even before the botanist might personally get a chance to look at them. Therefore, the role of computer vision is justified for fast classification of plant species before they become extinct. The sole purpose of this research work is to increase the predictive classification accuracy of plant species by using their shape and texture features obtained from the digital leaf images of dorsal sides. Since the geometrical shape features of the leaves alone are not able to provide better predictive classification accuracy results, therefore, the texture features have been clubbed together to achieve higher order of accuracy results. This leads to increase in the data size. Therefore, in order to reduce the feature dataset, random feature selection procedure has been adopted, which selects features on the basis of weights of attributes. The justifiability of the features selected has been carried out by using the feature importance plots and strengthened further by the partial dependency plots having been drawn to see their final inclusion into the final feature selection dataset. The results exhibited by the shape, shape subset, texture, texture subset of feature dataset as well as the combined dataset are quite exemplary and worth showcasing. In spite of the fact that the geometrical shapes of many of the leaves may be the same or almost same, the combined shape and texture features can be a suitable alternative for improvement in predictive accuracy results.
1 citations
TL;DR: This paper compared parallel algorithm and found that proposed parallel algorithm is less time complex than sequential algorithm, which means this algorithm can be used for maximum types of applications.
Abstract: Objective: To improve the Edge Cover based Graph Coloring Algorithm (ECGCA) using independent set by incorporating parallel computing aspects in algorithm. Finding optimum time complexity is one of the main objectives of this paper. Methods/Statistical Analysis: This paper introduced some modification in ECGCA. Algorithm is implemented and tested using Java programming language. Java multithreading concept is used to achieve parallel computing in algorithm. DIMACS graph instances are used to test algorithm. Finding: Algorithm is tested on more than 75 DIMACS graph instances. To analyze the time complexity, execution time of algorithm in seconds is calculated by program. Algorithm is tested on different DIMACS graph instances. Test data is analyze in this paper and found that proposed algorithm executed in optimum time for large graphs. This paper also compared parallel algorithm and found that proposed parallel algorithm is less time complex than sequential algorithm. Most of the exact graph coloring algorithms are not suitable for large graph (more than 100 vertices) but proposed algorithm is tested on many large graphs and high execution success rate of algorithm is achieved. Application: This paper shows the experimental results of different type of application data. It means this algorithm can be used for maximum types of applications.