A Power Iteration Clustering Based Technique for Fast Similarity Queries on Large Unstructured Datasets

Anoop V S * and Asharaf S
Indian Institute of Information Technology and Management – Kerala (IIITM-K) Thiruvananthapuram, Kerala, India

Email: anoop.res15 @ iiitmk.ac.in , asharaf.s @ iiitmk.ac.in


Abstract

Technological advancements in the areas of processing, representation and storage have created very huge amount of data available in structured, semi - structured and unstructured forms. Extraction of relevant information from unstructured data is always been a difficult task because it is random, complex and there are no formal structures available for its representation. This work extends a scalable graph clustering method called Power Iteration Clustering (PIC), for the extraction and visualization of relevant information from a large collection of unstructured datasets. Our experiment shows that PIC can be effectively used for efficient retrieval of information from huge dump of unstructured data. .

Keywords: Graph clustering, Micro-blogs, Information Retrieval, Power Iteration Clustering, Unstructured datasets.


An Adaptive Load-Aware Gateway Discovery in MANET

Mayank Kumar Rai, Rahul Kumar Singh and Rakesh Kumar*
Department of Computer Science and Engineering,
Madan Mohan Malaviya University of Technology, Gorakhpur, India

Email: mkrai7292@gmail.com, rahul9936@outlook.com, rkiitr@gmail.com


Abstract

A mobile ad hoc network (MANET) is a self-configuring infrastructure less network of mobile devices connected by wireless links. Each device in a MANET is free to move independently in any direction, and will therefore change its links to other devices frequently. Mobile nodes in the MANET can be connected to the Internet through the gateway. Several mechanisms have been proposed for integrating Internet with the MANET. In this paper we propose a mechanism that is based on hybrid gateway discovery in which we are setting the time-to-live (TTL) value dynamically based on the size of the network and the number of active sources and try to reduce the message overhead in the reactive zone. Further we have tried to discover the gateway in the proactive zone based on proactive load aware routing. By means of both an analytical and a simulation based study we have shown that our proposed scheme outperforms the remaining solutions in terms of overhead reduction. We examine the impact of traffic load and node mobility in terms of throughput. Simulation results indicate that our protocol outperforms existing solution.

Keywords: MANET, Gateway Discovery, Proactive Routing, AODV, Internet, Load Balancing.


Enhancing Quality of Service by Delivering Positive Customer Experience for the Indian DTH Industry

Joshi Sujata1*, Bhatia Sanjay2, Majumdar Arnab1and Malhotra Archit1
1Symbiosis Institute of Telecom Management, Symbiosis International University, India
2AMDOCS, India

Email: sjoshi@sitm.ac.in, sanjay.bhatia@amdocs.com, arnab.sitm@gmail.com, architmalhotra.sitm@gmail.com


Abstract

The objective of the research was to determine key service attributes and study their impact on customer-experience for the Indian DTH industry. Five service dimensions which determine service quality were considered, Reliability, Assurance, Tangibility, Empathy and Responsiveness. Primary data was collected from 440 DTH customers through a questionnaire which captures the importance and performance of 25 attributes. Findings indicate subtle relationship exist amongst service attributes and the customer-experience-scores. Attributes relating to Assurance and Responsiveness factors are highly correlated to experience scores. Also, Customers prioritize Reliability and Responsiveness factors the most. The study will help DTH operators in reducing churn by delivering superior customer-experience, recognize service voids and improve their quality of service. Limited research has been done on delivering customer-experience for the Indian DTH Industry. The paper extends the SERVQUAL dimensions to categorize key service attributes and measure their impact on customer experience.


Keywords: Importance/Performance, Customer-Experience, Servqual, Service dimensions.


Design of an Adaptive Gateway Discovery for MANET using Ant like Mobile Agent

Naveen Kumar Gupta1*, Rakesh Kumar2andAmit Kumar Gupta3
1Department of Computer Science and Engineering, Motilal Nehru National Institute of Technology, Allahabad, 211004, India.
2Department of Computer Science and Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, 273010, India.
3Department of Information Technology, Image Enterprises, Gurgaon , India

Email: {naveenkumar.gpt, rkiitr,amitguptaedu053}@gmail.com


Abstract

A mobile ad hoc network (MANET) is a wireless network that has many free or autonomous nodes, often composed of mobile devices or other mobile pieces, which can arrange themselves in various ways and operate without any strict network administration. In this network every node can access only local resources. In order to access global resources i.e. Internet, it needs to discover an Internet gateway. Internet gateway can be discovered by either sending periodic gateway advertisement or a solicitation message. The existing techniques are not efficient because of high discovery time and gateway discovery time affects efficiency and throughput. To reduce such problems, this paper combines Mobile IP and Ant like Mobile Agent (ALMA) where Foreign Agent (FA) works like a gateway and ALMA provides routes to gateways. ALMA-MobileIP provides high connectivity and minimizes delay before starting new connections and thereby reducing the amount of route discoveries. Mobile IP is also responsible for connection maintenance. Analytical result shown on this paper represents that proposed approach outperforms the existing one.


Keywords: Ant Like Mobile Agent (ALMA), Mobile Agents, Mobile IP, Handover, Pheromone Value, Decay Factor.