Indian Institute of Technology Ropar

About: Indian Institute of Technology Ropar is a education organization based out in Ropar, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1014 authors who have published 2878 publications receiving 35715 citations.

Contention Aware Energy Efficient Scheduling on Heterogeneous Multiprocessors

Abstract: Energy efficiency along with enhanced performance are two important goals of scheduling on multiprocessors. This paper proposes a Contention-aware, Energy Efficient, Duplication based Mixed Integer Programming (CEEDMIP) formulation for scheduling task graphs on heterogeneous multiprocessors, interconnected in a distributed system or a network on chip architecture. The effect of duplication is studied with respect to minimizing: the makespan, the total energy for processing tasks and messages on processors and network resources respectively and the tardiness of tasks with respect to their deadlines. Optimizing the use of duplication with MIP provides both energy efficiency and performance by reducing the communication energy consumption and the communication latency. The contention awareness gives a more accurate estimation of the energy consumption. We also propose a corner case that allows the scheduling of a parent task copy after a copy of the child task which may lead to efficient schedules. It has been observed that the proposed MIP with a clustering based heuristic provides scalability and gives 10-30 percent improvement in energy with improved makespan and accuracy when compared with other duplication based energy aware algorithms.

Scheduling Real Time Security Aware tasks in Fog Networks

Abstract: Fog computing brings the cloud closer to a user with the help of a micro data center (mdc), leading to lower response times for delay sensitive applications. RT-SANE (Real-Time Security Aware scheduling on the Network Edge) supports batch and interactive applications, taking account of their deadline and security constraints. RT-SANE chooses between an mdc (in proximity to a user) and a cloud data center (cdc) by taking account of network delay and security tags. Jobs submitted by a user are tagged as: private, semi-private and public, and mdcs and cdcs are classified as: trusted, semi-trusted and untrusted. RT-SANE executes private jobs on a user's local mdcs or pre-trusted cdcs, and semi-private and public jobs on remote mdcs and cdcs. A security and performance-aware distributed orchestration architecture and protocol is made use of in RT-SANE. For evaluation, workload traces from the CERIT-SC Cloud system are used. The effect of slow executing straggler jobs on the Fog framework are also considered, involving migration of such jobs. Experiments reveal that RT-SANE offers a higher success ratio (successfully completed jobs) to comparable algorithms, including consideration of security tags.

From Hydrophobic to Hydrophilic: The Structure and Density of the Hexadecane Droplet/Alkanol/Water Interface

Abstract: The molecular structure of the hexadecane droplet/alkanol/water interface has been investigated using vibrational sum frequency scattering and second harmonic scattering. This combination of methods allows us to investigate the interfacial alkyl chain conformation of the oil and several alkanols, ranging from 1-pentanol to 1-dodecanol, the orientational distribution of the methyl groups, the surface density of the alkanols, as well as the orientational alignment of water. For the hexadecane/1-dodecanol/water interface, dodecanol alkyl chains form a fluid layer with a wide distribution of tilt angles of the terminal CH3 groups. Indistinguishable spectra are recorded for the alkanol alkyl chains of 1-pentanol, 1-hexanol, 1-octanol, and 1-dodecanol, and alkanols with chain length longer than 6 C atoms all form films with similar densities. In contrast, the alkyl chains of the oil phase are relatively more distorted with respect to the pure oil/water interface for alkanols with shorter chain lengths. The proj...

Surface decoration of ZnO nanoparticles: A new strategy to fine tune the recognition properties of imine linked receptor

Abstract: A dipodal receptor bearing imine linkages is decorated on the surface of ZnO nano-particles. The cation recognition properties of pure dipodal receptor are compared with the assembly having same receptor decorated on ZnO. The remarkable changes in the recognition profile are established and the ZnO coated with dipodal receptor system authenticates its use as a sensitive and selective sensor for Mg 2+ in semi-aqueous medium. The ZnO coated dipodal receptor can be used to recognize the Mg 2+ in cells of Saccharomyces cerevisiae .