Gomathi K.,Sathyabama University |
Parvathavarthini B.,College of St. Joseph
Proceedings of the 2nd International Conference on Trendz in Information Sciences and Computing, TISC-2010 | Year: 2010
A Mobile Ad Hoc Network (MANET) is a self-organizing, infrastructureless, multi-hop network. The wireless and distributed nature of MANETs poses a great challenge to system security designers. Key management is crucial part of security, this issue is even bigger in MANETs. The distribution of encryption keys in an authenticated manner is a difficult task. Because of dynamic nature of MANETs, when a node leaves or joins it need to generate new session key to maintain forward and backward secrecy. In this paper we divide the network into clusters. Cluster head will maintain the group key, it will also update the group key whenever there is a change in the membership And also we provide authentication between communicating nodes both in inter and intra cluster. This paper proposes a new cluster based tree (CBT) algorithm for secure multicast key distribution, in which source node uses Destination Sequenced Distance Vector(DSDV) routing protocol to collects its 1 hop neighbors to form cluster. The simulations are performed using Network simulator, Simulation results shows the demonstration of CBT using DSDV in terms of end to end delay, key delivery ratio and packet drop rate, fault tolerance, communication cost under varying network conditions. ©2010 IEEE.
Kaliamoorthy S.,Anna University |
Paramasivam R.,College of St. Joseph
Thermal Science | Year: 2013
The study is aimed at investigating the effects of engine parameters on the performance and emission characteristics of a single cylinder 5.2 kW diesel engine. The experiments were designed using a statistical tool known as design of experiments based on Taguchi. Five parameters, namely, power, static injection pressure, injection timing, fuel fraction, and compression ratio were varied at four levels and the responses brake power, fuel economy, and emissions were investigated. The optimum values of the response could be predicted using signal - noise ratio and optimum combination of control parameters were specified. Results of confirmation tests showed good agreement with predicted quantities. A compression ratio of 17.7, blend of 20% karanja biodiesel, an injection pressure of 230 bar, injection timing of 27° before top dead centre and at 70% load were found to be optimal values for the karanja biodiesel blended diesel fuel operation in the test engine.
Sivaramakrishnan K.,Anjalai Ammal Engineering College |
Ravikumar P.,College of St. Joseph
ARPN Journal of Engineering and Applied Sciences | Year: 2012
Biodiesel, an alternative fuel can be used in diesel engine as neat or blended with diesel. The physio-chemical properties of fuel are important in design of fuel system for compression ignition engine run on diesel, biodiesel or biodiesel blends. Cetane number is an important parameter in evaluating the quality of biodiesel fuel. Its determination is usually arduous and expensive. The present study is aimed at developing the mathematical relationship between viscosity, density, calorific value, flash point and cetane number (CN). An equation was developed relating the cetane number and thermal properties. The predicted cetane number values are compared with the measured cetane number values. This work establishes the general dependence of cetane number on the thermal properties of biodiesel. © 2006-2012 Asian Research Publishing Network (ARPN).
D'Mello D.A.,College of St. Joseph |
Ananthanarayana V.S.,National Institute of Technology Karnataka
Proceedings - 1st International Conference on Integrated Intelligent Computing, ICIIC 2010 | Year: 2010
The increasing number of Web service providers over the Web has prompted the need for research in service description and discovery. The Web service requesters need tools, in order to search suitable services that satisfy the requester's needs. The Web service discovery is defined as a mechanism that allows the service requester to gain an access to the service descriptions and make them available to the application at runtime for binding. The service requesters can retrieve a service descriptions at design time or at run time from the service description repository i.e. service registry like UDDI. The lookup mechanism must support a query mechanism to explore services based on the type of interface, the binding information (protocols), properties (QoS properties), the taxonomy of service and the business (provider) information etc. This paper reviews (and classifies) various architectures and matchmaking mechanisms defined in literature for the dynamic Web service discovery. © 2010 IEEE.
Sutari O.,College of St. Joseph
Materials Today: Proceedings | Year: 2015
This research paper focuses on process improvement carried out in the nacelle unit of a wind turbine manufacturer. Lean Manufacturing (LM) is implemented to improve productivity in terms of manufacturing throughput time and to also reduce cost of rework/manufacturing costs. Tools like Root Cause Analysis and Kaizen were used in conjunction to create efficient results for the manufacturing processes. By assessing the current condition and establishing a baseline to work upon, improvement was achieved through the testing and implementation of solutions to the problems found. Process improvement was successful as seen in the acceleration of schedules and reduction in costs. © 2015 Elsevier Ltd.
Krishna K.S.,College of St. Joseph |
Bhat M.S.,National Institute of Technology Karnataka
Circuits, Systems, and Signal Processing | Year: 2012
Vias are extensively used to connect different metal levels in a multilayered Integrated Circuits (IC). The impedance discontinuities at the junction of the interconnect and via results in signal reflections and create signal integrity problems. This is one of the important design issues in ICs operating at gigahertz (GHz) frequencies. In this paper, a method for the reduction of via-induced signal reflection in high-speed on-chip intermediate/global interconnect structures is proposed. Signal reflection minimization is achieved through impedance matching by the inclusion of an appropriate capacitive load at the interconnect-via junction. This method is demonstrated for a two-layer interconnect structure connected through a via. The proposed solution reduces the signal reflection to as low as -35 dB at the tuned frequency of 5 GHz and less than -10 dB in its vicinity (1 to 10 GHz). The operating frequency can be changed by tuning the matching capacitive load and hence this method can be extended to any high frequency operation by digitally tuning a bank of on-chip capacitors (without going through a new fabrication run). Further it is shown that the signal reflections are reduced considerably in a six-layer structure and hence this method can be extended to any multi-level interconnect structure. © Springer Science+Business Media, LLC 2011.
D'Mello D.A.,College of St. Joseph |
Ananthanarayana V.S.,National Institute of Technology Karnataka |
Salian S.,College of St. Joseph
Communications in Computer and Information Science | Year: 2011
The requester's service request sometimes includes multiple related functionalities to be satisfied by the Web service. In many cases theWeb service has a limited functionality which is not sufficient to meet the requester's complex functional needs. The discovery mechanism for such complex service request involving multiple tasks (operations) may fail due to unavailability of suitable Web services advertised in the registry. In such a scenario, a need arises to compose the available atomic or composite Web services to satisfy the requester's complex request. Dynamic Web service composition generates and executes the composition plan based on the requester's runtime functional and nonfunctional requirements. This paper provides the review of Web service composition architectures and techniques used to generate new (value added) services. © Springer-Verlag Berlin Heidelberg 2011.
Jagadeesan D.,Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya |
Srivatsa S.K.,College of St. Joseph
Journal of Computer Science | Year: 2012
Problem statement: In mobile ad hoc networks, frequent mobility during the transmission of data causes route failure which results in route rediscovery. In this, we propose multipath routing protocol for effective local route recovery in Mobile Ad hoc Networks (MANET). In this protocol, each source and destination pair establishes multiple paths in the single route discovery and they are cached in their route caches. Approach: The cached routes are sorted on the basis of their bandwidth availability. In case of route failure in the primary route, a recovery node which is an overhearing neighbor, detects it and establishes a local recovery path with maximum bandwidth from its route cache. Results: By simulation results, we show that the proposed approach improves network performance. Conclusion: The proposed route recovery management technique prevents the frequent collision and degradation in the network performance. © 2012 Science Publications.
Dhanapal J.,Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya |
Srivatsa S.K.,College of St. Joseph
IET Information Security | Year: 2013
In mobile ad hoc network (MANET) routing protocols such as dynamic source routing, each node consist of route cache, in which routes to multiple destinations are indexed orderly. Since, route cache is capable of storing many routes it should be maintained periodically to its consistency and reliability. In this study, the authors put forward a link quality-based cache replacement technique in MANET. In this technique, the source obtains multiple paths to the destination through multipath routing. The acquired paths are stored in route cache. The cache replacement technique estimates the link quality using Received Signal Strength (RSS) value. Links that possess low RSS value are removed from the route cache. Concurrently, the route cache table is maintained periodically by each node using its timestamp value. The authors validate the efficiency of cache replacement technique through simulation results. The technique maintains the route cache proficiently and improves the throughput of the system. © 2013 The Institution of Engineering and Technology.
Kolekar S.,College of St. Joseph
Applied Mechanics and Materials | Year: 2014
Vibrations are unwanted in most of the day today usage especially in mechanical machines, civil structures, aerospace industries and automotive parts. It is usually to get the rid of these vibrations by using magneto rheological fluids. A magneto rheological fluid provides viscous damping which gets added up when magnetic field is applied. The damping properties of fluid get multiplied and natural frequency of the body under observation also changes, using this technique the three layered MR fluid sandwich beam was fabricated and tested it for undamped and damped conditions. The controllability of variations in the various dynamic parameters like natural frequencies, vibration amplitudes and damping factors was observed. © (2014) Trans Tech Publications, Switzerland.