Indian Institute of Technology Delhi

About: Indian Institute of Technology Delhi is a education organization based out in New Delhi, India. It is known for research contribution in the topics: Photovoltaic system & AC power. The organization has 11679 authors who have published 26945 publications receiving 503855 citations.

pMapper: power and migration cost aware application placement in virtualized systems

Abstract: Workload placement on servers has been traditionally driven by mainly performance objectives. In this work, we investigate the design, implementation, and evaluation of a power-aware application placement controller in the context of an environment with heterogeneous virtualized server clusters. The placement component of the application management middleware takes into account the power and migration costs in addition to the performance benefit while placing the application containers on the physical servers. The contribution of this work is two-fold: first, we present multiple ways to capture the cost-aware application placement problem that may be applied to various settings. For each formulation, we provide details on the kind of information required to solve the problems, the model assumptions, and the practicality of the assumptions on real servers. In the second part of our study, we present the pMapper architecture and placement algorithms to solve one practical formulation of the problem: minimizing power subject to a fixed performance requirement. We present comprehensive theoretical and experimental evidence to establish the efficacy of pMapper.

Vendor Selection Using Interpretive Structural Modelling (ISM)

Abstract: Vendor selection is one of the most important activities of a purchasing department. Traditionally, vendors are selected for their ability to meet the quality requirement, delivery performance and the price offered. However, as they are selected not only to meet the immediate requirement but also future needs, one needs to consider many other factors when selecting a reliable vendor. Analyses some of the most important criteria which have been classified into four categories: autonomous, dependent, linkage and driver depending on their driver power and dependence. Develops an interpretive structural model (ISM) to show the inter‐relationship of different criteria and their levels of importance in the vendor selection process. Reveals that “attitude and willingness for business” and “after sales service” are as important factors as quality, delivery and practice. These criteria are dependent on all the others. This analysis could provide a meaningful analytical base in the vendor selection process.

An Introduction to Fiber Optics

Abstract: 1. Introduction 2. Basic optics 3. The optical fiber 4. Ray analysis of planar optical waveguide 5. Graded index optical fibers 6. Material dispersion 7. Planar waveguides 8. Characteristics of a step-index fiber 9. Graded Index fibers 10. Waveguide dispersion and design considerations 11. Sources for optical fiber communication 12. Detectors for optical fiber and communication 13. Fiber optic communication system design 14. Optical fiber Amplifiers 15. Dispersion compensation and chirping phenomenon 16. Optical solitons 17. Single-mode fiber optic components 18. Single mode optical fiber sensors 19. Measurement methods in optical fiber: I 20. Measurement methods in optical fibers: II 21. Periodic interactions in waveguides 22. Ray equation in Cartesian coordinates 23. Ray paths 24. Leaky modes.