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Kedawat G.,University of Rajasthan | Srivastava S.,University of Rajasthan | Jain V.K.,Lakshmipat University | Kumar P.,National Physical Laboratory India | And 4 more authors.
ACS Applied Materials and Interfaces | Year: 2013

We report a design and fabrication strategy for creating an artificially stacked multilayered optical filters using a thermal evaporation technique. We have selectively chosen a zinc sulphide (ZnS) lattice for the high refractive index (n = 2.35) layer and a magnesium fluoride (MgF2) lattice as the low refractive index (n = 1.38) layer. Furthermore, the microstructures of the ZnS/MgF2 multilayer films are also investigated through TEM and HRTEM imaging. The fabricated filters consist of high and low refractive 7 and 13 alternating layers, which exhibit a reflectance of 89.60% and 99%, respectively. The optical microcavity achieved an average transmittance of 85.13% within the visible range. The obtained results suggest that these filters could be an exceptional choice for next-generation antireflection coatings, high-reflection mirrors, and polarized interference filters. © 2013 American Chemical Society.

Sharma R.,Lakshmipat University
Lecture Notes in Engineering and Computer Science | Year: 2015

In this study, we deal with the reliability analysis of repairable system under N-policy, setup and imperfect coverage. The repairman is turned on only when 'N' and more failed components are accumulated in the system for providing repair. The system consists of 'M' operating, 'S' warm and 'Y' cold standby components. As any component fails, it is immediately replaced by standby component if available with coverage probability 'c'. The life and repair times of component are assumed to be exponentially distributed. Various reliability performance measures are obtained using Runge-Kutta (RK) method. Moreover, numerical results are also provided by taking an illustration. Finally, the conclusion has been given.

Kaushik M.,University | Kumar G.,Lakshmipat University
Lecture Notes in Engineering and Computer Science | Year: 2015

This investigation deals with a markovian analysis for software reliability model using errors generations and imperfect debugging. Three types of errors are taken into consideration for developing a software reliability model. The debugging is done in a manner without distinguishing between the three types of errors. Moreover, Runge-Kutta (RK) method of fourth order is applied for analyzing the software reliability of different configurations under transient condition. Various characteristics of software reliability assessment are suggested. The effect of different parameters on system performance indices are demonstrated graphically.

Jain S.,Lakshmipat University | Pareek J.,Gujarat University
International Journal of Metadata, Semantics and Ontologies | Year: 2013

To provide an adaptive guidance to the student through learning object repositories, a system needs to have knowledge about the learner as well as material. This paper discusses identification of metadata that describes the pedagogical aspects of a document. Learning goals and prerequisites, if stored as part of metadata, can be utilised for intelligent recommendations. Manual annotation is a time consuming and expensive process. Correct instantiation of learning object metadata requires combined educational and technical skills. This paper proposes natural language processing-based automatic concept extraction and outlines rule-based approach for separation of prerequisite concepts and learning outcomes covered in learning document. The importance of automatic extraction of prerequisite terms is strengthened after evaluation of this work, since results show that concepts missed by authors are suggested by the system. To increase precision of retrieval, subject domain ontology is used. Copyright © 2013 Inderscience Enterprises Ltd.

Khanna P.,Lakshmipat University | Jain S.,Lakshmipat University | Babu B.V.,Galgotias University
ARPN Journal of Engineering and Applied Sciences | Year: 2015

This research analyzes the performance of a distributed cloud broker in a live cloud environment, utilizing a government owned, private, federated cloud. The paper explores functioning of a distributed cloud broker that assists in the provisioning of services to geographically distributed data centers. The data centers have volunteered to federate and expose their utilization metrics to each other through the cloud broker. The experimental infrastructure utilizes the closed schema for federation. The cloud broker is responsible for match making and bundling/provisioning of services from multiple private cloud providers, through volunteer and federated data centers. This has been tested under multiple load conditions. The proposed distributed cloud broker handles the load on the cloud ecosystem through a strictly controlled mechanism in a private cloud ecosystem, custom routing all overload conditions (cloud bursting scenario) on specific private clouds through a common interface visible to the Amazon Web Services (AWS). The proposed broker mechanism shows high efficiency and lesser cloud bursting instances compared to a pure AWS based ecosystem. The work also analyzes real world issues faced by organizations handling cloud brokerage frameworks in a distributed manner. The research asserts that it is possible to create customized distributed cloud brokers and the perspective of using a hybrid cloud approach using distributed broker in federated clouds is feasible, albeit in a tightly integrated and fine tuned cloud environment. © 2006-2015 Asian Research Publishing Network (ARPN).

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