Greater Noida, India

Gautam Buddha University

www.gbu.ac.in
Greater Noida, India

Gautam Buddha University is a government university located in Greater Noida, Uttar Pradesh, India.It is one of Uttar Pradesh's state government university which commenced its first academic session in the year 2008.University campus is spread over 511 acres in Greater Noida and offers Bachelors,Masters and Doctoral degrees in Engineering,Business Administration,Computer Applications ,Biotechnology and Buddhist Studies and is mainly focused on research.It gives the students interaction with industry,preparation in entrepreneurship and personality development courses. Wikipedia.

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Sharma S.,Gautam Buddha University
International Journal of Advanced Manufacturing Technology | Year: 2012

In the present investigation, Ni-WC composite powder was modified with the addition of CeO2 in order to form a new composition of Ni-WC-CeO 2. The Ni-WC and Ni-WC-CeO2 compositions were used for coating deposition by high-velocity oxy-fuel (HVOF) spraying process so as to study the effect of CeO2 addition on microstructure, distribution of various elements, hardness, formation of new phases, and abrasive wear behavior. Further, the effect of load, abrasive size, sliding distance, and temperature on abrasive wear behavior of these HVOF-sprayed coatings was investigated by response surface methodology. To investigate the abrasive wear behavior of HVOF-sprayed coatings four factors such as load, abrasive size (size in micrometers), sliding distance (meters), and temperature (C) with three levels of each factor were investigated. Analysis of variance was carried out to determine the significant factors and interactions. Investigation showed that the load, abrasive size, and sliding distance were the main significant factors while load and abrasive size, load and sliding distance, abrasive size and sliding distance were the main significant interactions. Thus an abrasive wear model was developed in terms of main factors and their significant interactions. The validity of the model was evaluated by conducting experiments under different wear conditions. A comparison of modeled and experimental results showed 4-9% error. The abrasive wear resistance of coatings increases with the addition of CeO2. This is due to increase in hardness with the addition of CeO2 in Ni-WC coatings. © 2011 Springer-Verlag London Limited.


Awasthi A.K.,Gautam Buddha University | Srivastava K.,Central Institute of Plastic Engineering and Technology
Journal of Medical Systems | Year: 2013

In recent years, the increased availability of lower-cost telecommunications systems and customized patients monitoring devices made it possible to bring the advantages of telemedicine directly into the patient's home. These telecare medicine information systems enable healthcare delivery services. These systems are moving towards an environment where automated patient medical records and electronically interconnected telecare facilities are prevalent. Authentication, security, patient's privacy protection and data confidentiality are important for patient or doctor accessing to Electronic Medical Records (EMR). A secure authentication scheme will be required to achieve these goals.Many schemes based on cryptography have been proposed to achieve the goals. However,many schemes are vulnerable to various attacks, and are neither efficient, nor user friendly. Specially, in terms of efficiency, some schemes are resulting in high time cost. In this paper we propose a new authentication scheme that is using the precomputing to avoid the time-consuming exponential computations. Finally, it is shown to be more secure and practical for telecare medicine environments. © Springer Science+Business Media New York 2013.


Sharma S.,Gautam Buddha University
Journal of Thermal Spray Technology | Year: 2012

This paper describes the effect of combined addition of rare earth elements namely CeO 2 and La 2O 3 in Ni-base alloy coatings. The rare earth addition refines microstructure, increases hardness, and abrasive wear resistance of coatings. The abrasive wear behavior of these coatings was investigated using four factors load (L), abrasive size (A), sliding speed (S), and temperature (T) with three levels of each factor using RSM. ANOVA was carried out to determine the significant factors and interactions. Investigation showed that the load, abrasive size, and sliding speed were the main significant factors while load and abrasive size, load and sliding speed, abrasive size and sliding speed were the main significant interactions. Thus, an abrasive wear model was developed in terms of significant factors and their significant interactions. The validity of the model was evaluated by conducting experiments under different conditions. A comparison of modeled and experimental results showed 3-8% error. © 2012 ASM International.


Sharma S.,Gautam Buddha University
Journal of Thermal Spray Technology | Year: 2012

In the present study, the effect of CeO 2 addition in 1006 powder coatings on microstructure, microhardness, and high-temperature erosion resistance were studied. The CeO 2 addition refines microstructure, forms new phases, and increases microhardness of HVOF-sprayed coatings. The erosive wear behavior of coatings were investigated by Response Surface Methodology (RSM). To investigate and develop an erosive wear model of unmodified 1006 (without CeO 2) and modified 1006 (CeO 2 addition) coatings' four factors: velocity, impact angle, temperature, and feed rate, each factor at three levels were used. ANOVA was carried out to determine the significant factors and interactions. Thus, an erosive wear model was developed in terms of main factors and their significant interactions. A comparison of modeled and experimental results showed 4-7% error. The modified 1006 coating showed high erosive wear resistance as compared with unmodified 1006 coating. This is due to increase in hardness and refined microstructure of the modified 1006 coating. © 2011 ASM International.


Kaur S.,Gautam Buddha University | Singh S.,Gautam Buddha University
Medical Mycology | Year: 2014

Aspergillus fumigatus is a well adapted, opportunistic fungus that causes a severe and commonly fatal disease, invasive pulmonary aspergillosis (IPA), in highly immunocompromised patients, aspergilloma in patients with lung cavities and allergic bronchopulmonary aspergillosis (ABPA) in hypersensitive individuals. Recent studies have suggested that biofilm formation by A. fumigatus may be one of the most important virulence factors in IPA and aspergilloma. Several fungal constituents may contribute to the formation of biofilm structures on host cells, including cell wall components, secondary metabolites and drug transporters. The biofilm phenotype of the fungus is refractory to most conventional antifungal treatment options. Thus, an in-depth analysis and understanding of A. fumigatus biofilms is necessary to devise newer and better antifungal targets for treating complex A. fumigatus biofilm-associated diseases. © 2013 The International Society for Human and Animal Mycology. All rights reserved.


Lamb R.S.,Ohio State University | Citarelli M.,Ohio State University | Teotia S.,Gautam Buddha University
Cellular and Molecular Life Sciences | Year: 2012

Poly(ADP-ribosyl)ation is the covalent attachment of ADP-ribose subunits from NAD + to target proteins and was first described in plants in the 1970s. This post-translational modification is mediated by poly(ADP-ribose) polymerases (PARPs) and removed by poly(ADP-ribose) glycohydrolases (PARGs). PARPs have important functions in many biological processes including DNA repair, epigenetic regulation and transcription. However, these roles are not always associated with enzymatic activity. The PARP superfamily has been well studied in animals, but remains under-investigated in plants. Although plants lack the variety of PARP superfamily members found in mammals, they do encode three different types of PARP superfamily proteins, including a group of PARP-like proteins, the SRO family, that are plant specific. In plants, members of the PARP family and/or poly(ADP-ribosyl)ation have been linked to DNA repair, mitosis, innate immunity and stress responses. In addition, members of the SRO family have been shown to be necessary for normal sporophytic development. In this review, we summarize the current state of plant research into poly(ADP-ribosyl)ation and the PARP superfamily in plants. © 2011 Springer Basel AG.


Pachauri R.K.,Gautam Buddha University | Chauhan Y.K.,Gautam Buddha University
Renewable and Sustainable Energy Reviews | Year: 2015

This paper presents a novel comparative study on fuel cells (FCs) technologies, its modeling and effect of important parameters on the performance of various types of fuel cells and power management schemes. Firstly, this paper presents a comprehensive review of various FCs technologies with their working principle, efficiency, operating parameters, advantages/disadvantages and applications. Secondly, the mathematical analysis of various FCs has been investigated, which is required for MATLAB simulation of FCs. The influences of various operating parameters such as temperature, reactant flow pressure and membrane resistance are considered to investigate the dynamic behavior of FCs. Thirdly, various control schemes of power management e.g., current, voltage, power and reactants flow pressure based control schemes are proposed with simple and easy to implement PI controller for a phosphoric acid fuel cell (PAFC) operation in this paper. These control mechanisms can be utilized for power management schemes. The proposed model of PAFC along with these control schemes is realized in the MATLAB/Simulink environment. The performance of a PAFC system along with these proposed control is found to be satisfactory even under dynamic conditions. The study can be broadly helpful to select and set the various parameters for the development of a FC based application. © 2014 Elsevier Ltd. All rights reserved.


Sharma S.,Gautam Buddha University
Tribology International | Year: 2014

Co base powder (EWAC1006 EE) was modified with the addition of 20%WC and the same was further modified by varying amounts of chromium carbide (0, 10 and 20 wt%) in order to develop three different coatings. Microstructure, elemental mapping XRD, porosity and hardness analysis of the three coatings was carried out. The effect of CrC concentration (C), load (L), abrasive size (A), sliding distance (S) and temperature (T) on abrasive wear of these flame sprayed coatings was investigated by Response Surface Methodology and an abrasive wear model was developed. A comparison of modeled and experimental results showed 5-9% error. © 2014 Elsevier Ltd.


Siddiqi A.H.,Gautam Buddha University
AIP Conference Proceedings | Year: 2012

In this chapter, the role of wavelet methods applied to identification and characterization of oil reservoir is elaborated. The market rate of petroleum product is very much related to exploration, drilling and production cost. The main goal of researchers working in oil industry is to develop tools and techniques for minimizing cost of exploration and production. Efforts of researchers working in applications of wavelet methods in different parts of the world to achieve this goal is reviewed. Wavelet based solution of Buckley-Leverett equation modelling reservoir is discussed. Variants of Buckley-Leverett equations including its higher dimension versions are introduced. Wavelet methods for inverse problems associated with Buckley-Leverett equation, which are quite useful for oil recovery, are also explained in this chapter. © 2012 American Institute of Physics.


Chaudhary B.,Gautam Buddha University
International Journal of Plant Genomics | Year: 2013

Transformation of wild species into elite cultivars through "domestication" entails evolutionary responses in which plant populations adapt to selection. Domestication is a process characterized by the occurrence of key mutations in morphological, phenological, or utility genes, which leads to the increased adaptation and use of the plant; however, this process followed by modern plant breeding practices has presumably narrowed the genetic diversity in crop plants. The reduction of genetic diversity could result in "broad susceptibility" to newly emerging herbivores and pathogens, thereby threatening long-term crop retention. Different QTLs influencing herbivore resistance have also been identified, which overlap with other genes of small effect regulating resistance indicating the presence of pleiotropism or linkage between such genes. However, this reduction in genetic variability could be remunerated by introgression of novel traits from wild perhaps with antifeedant and antinutritional toxic components. Thus it is strongly believed that transgenic technologies may provide a radical and promising solution to combat herbivory as these avoid linkage drag and also the antifeedant angle. Here, important questions related to the temporal dynamics of resistance to herbivory and intricate genetic phenomenon with their impact on crop evolution are addressed and at times hypothesized for future validation. © 2013 Bhupendra Chaudhary.

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