ex summary completed projects 31aug06

8/3/2019 Ex Summary Completed Projects 31aug06

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PROJECT NO. 01PROJECT NO. 01 (Hydrodynamics Panel)(Hydrodynamics Panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:

Numerical Simulation of turbulence and transition for flow aroundNumerical Simulation of turbulence and transition for flow aroundarbitrary shaped underwater bodies.arbitrary shaped underwater bodies.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr. Sekhar MajumdarDr. Sekhar Majumdar

NAME OF INSTITUTE:NAME OF INSTITUTE: NAL BangaloreNAL Bangalore

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Aug 1998Aug 1998

DATE OF COMPLETION:DATE OF COMPLETION: Dec 2003Dec 2003

AIM/OBJECTIVES OF THE PROJECT:AIM/OBJECTIVES OF THE PROJECT:

- To formulate stability theory for the laminar boundary layer around- To formulate stability theory for the laminar boundary layer aroundan ax symmetric body steadily translating through fluid in a directionan ax symmetric body steadily translating through fluid in a directionparallel to its axis.parallel to its axis.- To develop spectral code to solve the ensuing stability equations in- To develop spectral code to solve the ensuing stability equations inorder to estimate up to what stream wise extent laminar flow can beorder to estimate up to what stream wise extent laminar flow can beexpected on a given ax symmetric body. The scope of the projectexpected on a given ax symmetric body. The scope of the projecthas been expanded to includehas been expanded to include

- To develop a model of the axisymmetric transition zone, and- To develop a model of the axisymmetric transition zone, and

- Comparison of approaches to non-parallel stability solutions- Comparison of approaches to non-parallel stability solutions..

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:

- Simulation of stability and transition for flow past ax symmetric- Simulation of stability and transition for flow past ax symmetric

bodies.bodies.- Numerical simulation of turbulent flow using unsteady ReynoldsNumerical simulation of turbulent flow using unsteady Reynolds

averaged navier stokes and large eddy simulation methodology.averaged navier stokes and large eddy simulation methodology.

ACHIEVEMENTS:ACHIEVEMENTS:

- Formulated a stability theory for laminar boundary laser around axsymmetric body- Solved the mean flow equation & developed spectral code- Developed model & code for prediction of transitional intermittencyon ax symmetric body studied 02 different approvals for solving non-

parallel stability problem in 2-D boundary layer

LIKELY APPLICATION OF THE OUTCOME:LIKELY APPLICATION OF THE OUTCOME:

Outcome of projects can be implemented in designing theOutcome of projects can be implemented in designing theunderwater body.underwater body.

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PROJECT NO. 02PROJECT NO. 02 (Hydrodynamics panel)(Hydrodynamics panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:Development of finite element analysis capability for harmonic andtransient exterior acoustics including fluid structure interaction withapplication to ships and underwater vehicle.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR:

-P-Prof. C P Vendhan & Dr. S K Bhattacharya

NAME OF INSTITUTE:NAME OF INSTITUTE: Indian Institute of Technology, Madras

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Mar 1998

DATE OF COMPLETION:DATE OF COMPLETION: Mar 2002


-To predict noise, generated signals by underwater vehicle.-To compute the shock response of underwater structure.- To investigate new & better FE methods logins for this class of

problems- Numerical study and practical problems related to ships &underwater vehicle.


- Finite element formulation of sound radiation & scattering byvibrating bodies in frequency and time domain.

- Development of radiation boundary operating infinite elementcontext and study of their efficacy in modeling truncation boundaryof infinite fluid- Study of un-symmetric equation solver and its use in transient &harmonic problems- Development of coupled shell-fluid interaction problem using mostgeneral un-symmetric pressure displacement formulation and itssolution.- Investigation of critical transient problems.- Connection for solver to commercially available pre and post

processor.

- Treatment of anisotropy sound absolving medium in FE formation- Study of floating structure and underwater structures operatingnear the free surface considering free surface effect and FEformation of sound propagation in porous media


Example problems of following undertaken for solving:


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- Exterior spherical shell-fluid interaction, harmonic pulsatingsphere, interior spherical shell-fluid interaction.- Infinite circular cylindrical radiator- Infinite elliptical cylindrical radiator- Circular Cylindrical steel shell fluid interaction


- Reservoir behind a dam under earthquake load slashing of liquidsin flexible tanks, blast/explosion, load on structure, sound radiationfrom elastic structures.-Transient radiation of acoustic waves by flexible obstacle

SUGGESTION FOR FUTURE WORK, IF ANY:SUGGESTION FOR FUTURE WORK, IF ANY:

-Noise known surface displacement pattern which is embedded in anacoustic medium of infinite extent fields of use like ultrasonic nondestructive evaluation of flows in structural pasts, sonar &

underwater acoustics, geo physics, control of radiation, medicaluses of ultrasound for diagnostic purposes.

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PROJECT NO.NO. 33 (Hydrodynamics panel)(Hydrodynamics panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:Development in Computational methods for free surface NavalHydrodynamics problems and study of bow wake breaking & bowvortices generation.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr. Debabrata Sen

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Kharagpur

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: APR 1998

DATE OF COMPLETION:DATE OF COMPLETION: JUL 2002

AIM/OBJECTIVES OF THE PROJECT:AIM/OBJECTIVES OF THE PROJECT:-Fundamental developments in computational methods based on a

boundary integral formulation and Rankine Sources for a class offree-surface problem.-Study of bow-wave breaking & the mechanism involved ingeneration of bow vortices by suitable computational scheme.


-Formulation of class of problems and their solutions, developmentof 2D & 3D low order panel methods, development of higher ordersolutions and application of these for simplified problems for whichclosed form solutions are available.


-A suit of boundary integral solvers for 2D & 3d applications developedand applied to solve problems for a no. of geometrics.-The main solver required the discretized form of the geometry andimposed boundary conditions. This was made an integral part for the 2Dprogram and 3D Problem.-Algorithm extended to solve the problem of an oscillating free surfacepiercing body using the developed solver.


-The present level of development of codes can be used only forsome elementary problems of interest (such as determining addedmasses of submerged bodies like torpedoes and submarines).-Likely end users : NSTL, Shipyard design personnel and Marineclassification Societies such as IRS.


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PROJECT NO. 4NO. 4 (Hydrodynamics panel)(Hydrodynamics panel)


Unsteady effects in Hydrodynamics.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. J H Arakeri

NAME OF INSTITUTE:NAME OF INSTITUTE: IISc., Bangalore


DATE OF COMPLETION:DATE OF COMPLETION: JUN 2002


To address main issues in unsteady flow like:-Transition to turbulence under unsteady conditions.-The mechanism of UBLS & Reynolds number effects in UBLS

-Effects of turbulence in UBLS & Viscous effects in added masscalculations.


Experimentation on:-Special unsteady flow water channel facility-Effects of turbulence on UBLS in a free surface water tunnel-Developing UBLS criterion for turbulent boundary layers


-Experiments performed with two types of bodies: bluff with a largeadverse pressure gradient and other a small angle diffuser having amild pressure gradient.-A new body fabricated having curvature in the joint of the straight anddiffuser section, which reduces pressure gradient at that location. Thiswas done to get rid of the problem of separation vortex seen in most ofthe cases in leading edge.


--More experimentation needed with different types of bodies andpiston motions.-Study of solid-fluid interaction problems with freely moving bodies.-Quasi-steady stability analysis of the inflectional velocity profile.

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PROJECTPROJECT NO. 5 (Sonar & Signal Processing Panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:Transient Signal Detection using Wavelet Transform (for SonarSignal Processing).

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. Bindu Chandna &Prof. Vikram M Gadre

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Bombay, Mumbai


DATE OF COMPLETION:DATE OF COMPLETION: DEC 2001

AIM/OBJECTIVES OF THE PROJECT:AIM/OBJECTIVES OF THE PROJECT:-To explore the use of time-frequency transforms, namel, Wave lettransform & Wave packet transform for detection of transientsignals.

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:-Exploration of the use of Gabort , short Time Fourier and Wave lettransform in the detection of transient signals.-Investigation of the use of Wave let packet decomposition.-Performance comparison of these techniques in terms of ROCs.-Validation of techniques against actual data.

ACHIEVEMENTS:ACHIEVEMENTS:-Explored the detection schemes based on Wave let Transforms,Wave packet Transforms and a new scheme NMTI Wave packet

developed by the PIs.-Observed that on simulated signals, NMTI Wave packet schemeoutperforms the other schemes.-Detailed study of Data reduction in transient detection

undertaken.-Explored the aspect of using more than one significant transformcoefficients in the transient detection.-Testing of all schemes on real Sonar signals undertaken andanalysed the effect of dispersion & scattering on transient detection.


-Processing of biomedical images.-Monitoring and automatic diagnosis of machinery.

SUGGESTION FOR FUTURE WORK, IF ANY:SUGGESTION FOR FUTURE WORK, IF ANY:-Development of Software simulation packages for the modeling andanalysis of transients using modern signal analysis tools,particularly Wavelet methods, with application to Sonar Signalprocessing.


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PROJECT NO. 06PROJECT NO. 06 (Sonar & Signal Processing panel)(Sonar & Signal Processing panel)


Development of optimal passive tracking algorithm for multipleDevelopment of optimal passive tracking algorithm for multiplemaneuvering targets.maneuvering targets.

NAME OF THE PRINCIPAL INVESTIGATORNAME OF THE PRINCIPAL INVESTIGATOR:: Shri Vijay Kumar ChakkaShri Vijay Kumar Chakka

NAME OF INSTITUTE:NAME OF INSTITUTE: REC, TiruchirapalliREC, Tiruchirapalli

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Mar 1998Mar 1998




To provide advance algorithm for solving the problem in allTo provide advance algorithm for solving the problem in allconstituent fields of the tracking process and unified solutionconstituent fields of the tracking process and unified solution..

ACHIEVEMENT:ACHIEVEMENT:

- Extension of DOA estimation for circular arrays and DMUSICalgorithms for identification of source/multi paths- Development of Data Association Algorithm, integrated targettracking system & prediction using extended Kalman Filter,Unscented Filter Beam forming & computationally efficientprediction filter-unscented Kalman Filter

- Performance Comparison of Integrated target tracking systemusing different prediction filter- Development of integrated target tracking system for launching ofguided missile using prediction filter & modified APNG law


-For passive tracking of targets (Ships & Aero planes)-For passive tracking of targets (Ships & Aero planes)


-High speed microprocessor floating point type processors to be-High speed microprocessor floating point type processors to beused for precise result.used for precise result.

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PROJECT NO. 07PROJECT NO. 07 (Sonar & Signal Behaviour Panel)(Sonar & Signal Behaviour Panel)


Studies on Ambient Noise Structure and Acoustic scattering fromStudies on Ambient Noise Structure and Acoustic scattering fromobjects in the presence of Ambient Noise.objects in the presence of Ambient Noise.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr. AG PathakDr. AG Pathak

NAME OF INSTITUTE:NAME OF INSTITUTE: NIOT, ChennaiNIOT, Chennai


DAT OF COMPLETION:DAT OF COMPLETION: Mar 2001Mar 2001


-To study the noise processes and their physical origins at selected-To study the noise processes and their physical origins at selected points around the India coast and to carry out theoretical studies topoints around the India coast and to carry out theoretical studies to understand the interaction of random noise field with scatterers ofunderstand the interaction of random noise field with scatterers ofarbitrary shape.arbitrary shape.


-- Portable data acquisition system tested and ambient noise datacollected from different sites around Indian cost- More than zero data sets at various locations completely analyzedin frequency domain.- Database with VB (as front end) & MS-ACCESS (as back end)

created to analyze parametric dependence of date, wind spread, time& depth dependence etc. quantified.- Detailed acoustical recording of shrimp ( Aepheus Malabaicus )

made.- Pseudo-images of a sphere of a sphere obtained for isotropic &directional noise


-Ambient noise structure and acoustic scattering can be taken-Ambient noise structure and acoustic scattering can be takenaccount IU the future coastal survey.account IU the future coastal survey.


- Use of surface buoys equipped with necessary equipment for long- Use of surface buoys equipped with necessary equipment for long term monitoring . Low frequency is to be used in noiseterm monitoring . Low frequency is to be used in noisemeasurement. Database of the relevant field to be improved bymeasurement. Database of the relevant field to be improved bycollecting info from concern loss. Snapping shrimp (Alphenuscollecting info from concern loss. Snapping shrimp (AlphenusMalabarius) to study the biology & acoustic as it contributes to aMalabarius) to study the biology & acoustic as it contributes to a


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few coastal sites. Statistical energy analysis techniques for noise &few coastal sites. Statistical energy analysis techniques for noise &elastic scatters can be approached study in last spots to be done.elastic scatters can be approached study in last spots to be done.

-- Noise measurement should include low frequency range also- Database can be improved & expended with other labs (NSTL,NPOL etc.)

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PROJECTPROJECT NO. 08 (Materials Panel)


Smart Materials and Devices with Electrostriction and polarSmart Materials and Devices with Electrostriction and polarpropertiesproperties..

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. TRN KuttyProf. TRN Kutty

NAME OF INSTITUTE:NAME OF INSTITUTE: IISc, BangaloreIISc, Bangalore

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: May 1998May 1998

DATE OF COMPLETION:DATE OF COMPLETION: May 2002May 2002


- Build up a research group on ferroelectrics/ electrostrictive and- Build up a research group on ferroelectrics/ electrostrictive andpolar materials processing and devices.polar materials processing and devices.

- Development of materials with electrostrictive and polar properties- Development of materials with electrostrictive and polar propertiesin the form of (a) bulk ceramics (b) thin films and (c) glass ceramicin the form of (a) bulk ceramics (b) thin films and (c) glass ceramic composites.composites.


-To investigate the electrostrictive and polar materials as a part of-To investigate the electrostrictive and polar materials as a part ofthe smash structures with functionality of the both sensors as wellthe smash structures with functionality of the both sensors as wellas actuatedas actuated..


-- Novel gel-carbonate precipitate technique developed forpreparation of elctrostrictive & piezoelectric materials- Preparative methods modified to eliminate formation ofintermediate phase, particularly pyrochlore & niobats- Characterization & the electrostriction parameter correlated withthe chemical constituents as well as the processing parameters.- Fabrication of thin solid films of perovskite lead magnesium nitrate& its solid solutions accomplished by the sol-gel method- Investigation of utilization of electrostrictive ceramics as built-indamage-sensing diagnostics within the Laminar composites.

- Tunable vibration/strain sensor also fabricated from ceramicsbased on lead magnesium niobate-lead titanate solid solutions


- Development of sensors out actuators. Wings and control surface- Development of sensors out actuators. Wings and control surface of aircrafts, submarine shells and surfaces helicopter blades.of aircrafts, submarine shells and surfaces helicopter blades.


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-- Modification in the development effects of Wings & control surfacesof aircraft, submarine shell, helicopter blades etc- Precision space structure with electrostrictive actuators possiblefor accurate placements & control


- Fabrication of Single Crystal Specimens and epitaxial layers of- Fabrication of Single Crystal Specimens and epitaxial layers ofelectrostrictive materials such as lead zinc niobate-lead titanate andelectrostrictive materials such as lead zinc niobate-lead titanate andrelated composition will be highly promising.related composition will be highly promising.- Fabrication of single crystal specimens & epitexial layer ofelectrostrictive materials (e.g. lead zinc niobate-lead titanate) &related compositions would prove to be highly promising.

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Development of flame resistant thermosetting matrices forDevelopment of flame resistant thermosetting matrices forcomposites.composites.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. Veena ChoudharyProf. Veena Choudhary

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT DelhiIIT Delhi


DATE OF COMPLETION:DATE OF COMPLETION: Sep 2001Sep 2001


-The main objective of the project is to develop non-halogen flame-The main objective of the project is to develop non-halogen flameresistant low smoke emitting (FRLS) thermosetting matrices (such asresistant low smoke emitting (FRLS) thermosetting matrices (such as epoxies, polyesters and vinyl esters) for composites.epoxies, polyesters and vinyl esters) for composites.


To improve the technique for flame & thermal resistance of epoxyTo improve the technique for flame & thermal resistance of epoxypolymers for extending their application in electronic materialpolymers for extending their application in electronic material ..


- Evaluation of commercially available flame retardants/FR)(Hostaflam TPAP - To & Amgard AP)

- Evaluation of thermal mechanical & flaming characteristics ofcurved DGEBA-diglycidyl ether of bisphenol.- Observed that mechanical properties of neat resin surfaces andglass fibre reinforced laminates decreased magically uponincorporation of Hostle.- Thermal stability of defended on the concentration of the agent


Product can be used to electronic materials, pipes & conductorsProduct can be used to electronic materials, pipes & conductors

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PROJECT NO.: 11 (Materials Panel)

TITLE OF THE PROJECT

Polymerization of Aramid Polymers under Programmed Shear FlowConditions

PRINCIPAL INVESTIGATOR : Prof. DV Khakhar, Deptt of Chemical Engg

INSTITUTE : IIT Bombay

DATE OF COMMENCEMENT: Mar 98

DATE OF COMPLETION: Dec 02

AIM/OBJECTIVES OF THE PROJECT:

To arrive at new reactor design for the polymerization of rodTo arrive at new reactor design for the polymerization of rod like polymers, by obtaining fundamental understanding of thelike polymers, by obtaining fundamental understanding of the role of orienting shear flow on polymerization kinetics androle of orienting shear flow on polymerization kinetics anddetermination of optical shear histories for specific moleculardetermination of optical shear histories for specific molecularweight distributions, & product propertiesweight distributions, & product properties

SCOPE OF THE PROJECT

Detailed experimentation on polymerization

Theoretical Analysis

Experimental studies using different shear histories

ACHIEVEMENTS:

Detailed experimentation carried out on polymerization of PPTA inthe NMP-CaCl2 system in a non-stirred reactor

Computational code extended to the case of simple shear flow &results generated to study effect of different parameters of process

Polymerization reactions carried out in the rheometer-reactorsystem. Polymers produced characterized by means of inherentviscosity measure weight distribution measured for related samples.


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Laser ultrasonic topographic imaging of composition.Laser ultrasonic topographic imaging of composition.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr NN KishoreDr NN Kishore

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT KanpurIIT Kanpur


DATE OF COMPLETION:DATE OF COMPLETION: Mar 2003Mar 2003


-To improve the performance on structural members makes the-To improve the performance on structural members makes themonitoring and classification of defects, inhomogenities and damagemonitoring and classification of defects, inhomogenities and damagean important consideration for an optimum utilization of material.an important consideration for an optimum utilization of material.


To develop Laser ultrasonic topographic imaging equipmentTo develop Laser ultrasonic topographic imaging equipment


-- The algorithm is capable of reconstructing defects in unidirectionalcomposite materials by considering ray bending

- A bend of ray is clearly observed while pressing through defects.

These & curved ray path are considered for correcting the fixedvalue in the text interaction.

- The RMS error, which is a measure of the accuracy ofreconstruction, is

forwarded to be considerably higher for initial guesses, which are foraway from the actual values. A prior knowledge of the materialproperties as an initial guess yield good results.

- The investigators have developed an automated ultrasonic C-scan- The investigators have developed an automated ultrasonic C-scansystem, in which the acquisition system comprises of a highsystem, in which the acquisition system comprises of a high

resolution ultrasonic flow detector and a high speed A-D converterresolution ultrasonic flow detector and a high speed A-D convertercord.cord.


3-D ultrasonic imaging for full volume characterization of damage in3-D ultrasonic imaging for full volume characterization of damage inimport composite laminates. Such quantified images can be used toimport composite laminates. Such quantified images can be used toan assess the residual life of the component.an assess the residual life of the component.


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PROJECT NO.13 (MATERIALS PANEL)

TITLE OF THE PROJECT:Design and development of Fibre Reinforced Composite shipPropeller Shaft

NAME OF THE PRINCIPAL INVESTIGATOR-Prof. K Gupta & Dr. SP SinghDeptt of Mechanical Engineering

NAME OF INSTITUTE: Indian Institute of Technology (IIT), Delhi


DATE OF COMPLETION: Dec 2001

AIM/OBJECTIVES:

Development of Design procedure for the composite propeller shaft, byincluding the effect of propeller weight & sea environment conditions,apart from torque and axial thrust

Development of a FE analysis based programme for dynamic statusanalysis of composite shaft

Development of a software package (VC++) for fatigue analysis anddesign of the composite shaft

SCOPE OF THE PROJECT:

Designing of composite ship propeller shaft subjected to combinedloading, requiring calculation of optimal thickness of each layer bycontrolling its fibre angle.

Development of requisite complete design soft wave in VC++

ACHIEVEMENTS:

A test facility set up to test composite shafts. It is a general purposefacility & can be used for testing of rotating shafts

Development of design methodology & software based on that, for thecomposite propeller shaft

SUGGESTED END USE

Developed Software can be used for design of a composite shippropeller shaft


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LIKELY APPLICATION

Manufactures of small ships & boats who use composite propellershaft

SUGGESTIONS FOR FUTURE WORK:

Development of FE based design software which would permitintricate modeling of complex features of propeller shaft

Validation of design of composite propeller shaft through field tests

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PROJECTPROJECT NO. 14 (Scientific Computing Panel)


Methodology of heterogeneous implementations of real-timeMethodology of heterogeneous implementations of real-timeembedded system for vision/image processing.embedded system for vision/image processing.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. M BalakrishnanProf. M Balakrishnan

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT DelhiIIT Delhi

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Jul 1998Jul 1998

DATE OF COMPLETION:DATE OF COMPLETION: Sep 2002Sep 2002


Automated Synthesis of embedded systemAutomated Synthesis of embedded system


-- To provide a methodology for automatic synthesis of embeddedTo provide a methodology for automatic synthesis of embeddedsystemssystems

- To carry out Hardware, Software and interface synthesis along with- To carry out Hardware, Software and interface synthesis along withreal time operating systemreal time operating system

- Methodology to provide framework for fast system level decision- Methodology to provide framework for fast system level decisionspace exploration based on stochastic methods.space exploration based on stochastic methods.

ACHIEVEMENTS:ACHIEVEMENTS:- A framework centered around SUIF as the intermediate format, hasbeen defined.

- The following have been developed & implemented: -1. Algorithm for hardware-software partitioning based on

dynamic programming2. A tool to estimate performance of various processor3. A methodology to estimate h/o implementation cost of

part of the application4. A methodology for estimating the interface costs for

given architecture & mode of communication5. A customized kernel synthesizer for application like

collision detection, tracking & motion segmentation6. Other features line AC-to-VHDL translator, framework

for integrating all necessary tools, ASIP Synthesis,Stochastic model based Simulator and Synthesis ofVLIW ASIP based embedded multiprocessorarchitecture


-Embedded System designing-Embedded System designing

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TITLE OF THE PROJECT:TITLE OF THE PROJECT:A general purpose system partitioner and its application to thegiven value problems of large scale physical system.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. H Narayanan

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Bombay, Mumbai

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: JUL 1998

DATE OF COMPLETION:DATE OF COMPLETION: JUN 2002


-To build a general purpose system partitioner & use it in the parallel

computation of large scale physical system.-To exploit sparsity of the variable - system constraint relationthrough partitioning and to always follow the rule to deal withconstraint the way they appear naturally.


-Building a general purpose large scale system partitioner usingideas from sub-modular function theory.-To develop a macro level parallel algorithm for computing the Eigenvalues and Eigen vectors of Electrical network.


-The partitioner has been built. The architecture is robust andimplementations have not crashed.-A robust version of the parallel dc analyzer built. Experimentsconducted using Pentium III 800 MHz 256 RAM machine successfully.

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PROJECTPROJECT NO. 16 (Sonar & Signal Behaviour Panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:Development of Tools for characterization and analysis of systemwhich are invariant to a group of transformation and their applicationto Sonar Signal Processing.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr. SD Joshi

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Delhi, New Delhi.


DATE OF COMPLETION:DATE OF COMPLETION: APR 2002


-Characterisation of Linear-Scale-Invariant, Scale-Rotation-Invariant

and Scale-Translation-Invariant systems and extending theory togeneral Group-invariant Systems.-Characterisation of stochastic processes/random fields defined onthese groups & model for their generation.-General Simulation package for processing of Signals designedover these groups.


-Focused on theoretical developments for providing characterizationof G-invariant systems & processes and modeling framework of

processes.-Introduced the concept of Wiener filter on sphere developing theprediction framework.-Introduced the concept of matched filter for signals in isotropicnoise environment.-provided a general framework for images considering these assignals defined over direct product of scale and projective space.

LIKELY APPLICATION OF THE OUTCOME:LIKELY APPLICATION OF THE OUTCOME:-The work with some orientation can be used for Missile GuidanceProgrammes.


-Projective space framework needs to be evolved intensively.-The image generation model may be incorporated in the Wienerfilter based prediction strategy.


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PROJECTPROJECT NO. 19 (Hydrodynamics panel)

TITLE OF THE PROJECT :TITLE OF THE PROJECT :Numerical estimation of second-order wave forces on ships andocean platforms.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR:Dr. P KrishnankuttyDr. DileepKrishnan

NAME OF INSTITUTE:NAME OF INSTITUTE:DEPARTMENT OF SHIP TECHNOLOGY, COCHIN UNIVERSITY OFSCIENCE AND TECHNOLOGY

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: DECEMBER 1999

DATE OF COMPLETION:DATE OF COMPLETION: MAY 2004


-To develop a numerical capability and software for the estimation offirst-and second-order wave forces on marine structures

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:study on wave forces on marine structure


- Finite element analysis s/w for estimating wave forces an maximumstructure have been developed

- Pre and post processor modules which can act in stand-alone andin graphical modes have been also developed.- Successfully solved for second order potential and dependentsecond order forces- Software has been developed and effectively utilized to estimatefirst- and second-order wave forces on marine structures


-The software developed in the present work is for the estimation offirst- and second-order wave excitation forces on stationary marine

structure.


-The software utilizes the graphical pre/post processors of thecommercial FEA package NISA (display iv). Authorized users canuse this software for their research/design purposes in applicablecases.


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PROJECTPROJECT NO. 20 (Materials panel)

TITLE OF THE PROJECT:TITLE OF THE PROJECT:Development of low mixed refrigerant cascade cryogenicrefrigerator for on-board cooling of infra red and other electronics.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: DR. G VenkatrathnamDR. S Srinavasa Murthy

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Madras, Chennai

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: JULY 1999

DATE OF COMPLETION:DATE OF COMPLETION: MARCH 2003

AIM/OBJECTIVES OF THE PROJECT:AIM/OBJECTIVES OF THE PROJECT:-Fabrication of a low weight & low cost cryogenic refrigerator forcooling IR detectors & other electronic devices onboard upto 100deg K (-173 deg C) & meet a cooling load of about 3 watts.

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:-Design & fabrication of cryogenic refrigerator-Study performance of the refrigerator with different refrigerant

mixture-Devise methods for optimization of geometry & reduction of overallweight of the refrigerator

ACHIEVEMENTS:ACHIEVEMENTS:-Successfully developed a prototype using a mixture of gases andsingle commercially available compressor.

-80 deg to 120 deg K cooling for a 20W load achieved.-A workshop held at IIT Madras on 16 Apr 03 on Mixed refrigerantcryogenic refrigerator & liquefiers.

LIKELY APPLICATION OF THE OUTCOME:LIKELY APPLICATION OF THE OUTCOME:-Cooling of IR Detectors, night vision equipment, fire detection-Presentation of biological material at low temperature-Destruction of biological tissues-Cooling of X-ray & Gamma ray detectors


-Development efforts to further continue.-Problem of oil freezing, future improvement in efficiency, heatexchanger developments to be taken up in next phase.-Long term testing of refrigerator required & is important.-Need to study use of new, environment friendly & non-flammableHFC & FC mixture for production of low temperatures forapplications where & flammable Hydrocarbon are not tolerable.-Practical feasibility of use of improved refrigerator to be examined.


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TITLE OF THE PROJECT :

Production and Characteristics of Carbon Nano Tubes

PRINCIPAL INVESTIGATORs :Prof. P Kesavan Nair & Dr. PrathapHaridoss, Deptt of MME

INSTITUTE : IIT Madras

DATE OF COMMENCEMENT : Aug 99

DATE OF COMPLETION : Jun 05


Design a set up for carbon Nanotubes production in no. sufficient forexperimental studies using arc evaporation method &

Establish conditions & parameters for production of NTs

Establish correlation between NTs structures with production

Prelim investigation on acoustic & vibration dampingPrelim investigation on acoustic & vibration damping

ACHIEVEMENTS:

CNTs produced by arcing in Air & arcing under flowing Argon

Arcing carried out under vacuum; with 85% & 99% pure graphiterods as anode

Production conditionscompared

Arcing in open air found to result in improved yield

Structure of CNTs studied & Prelim investigations carried out onacoustic absorption of mild steel & other material to identify materialbased trends.

LIKELY APPLICATION OF THE OUTCOME/SUGGESTION FOR FUTURE WORK:

Study the possibility of using CNTs as re-inforcing agents incomposite material

Systematically study the possibilities of synthesizing CNT basedcomposite material & to develop means to align CNTs in this

composite material. Follow up Project no. 71 Production of CNT based Capacity in

progress since May 06

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Intact and damaged ship stability in a dynamic environment- Anexperimental study.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr VA Subramanian

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT Madras , Chennai

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: AUG 1999

DATE OF COMPLETION:DATE OF COMPLETION: DEC 2003


-To study the dynamic behaviour of a ship with water ingress of deckand inside, in beam and quartering sea conditions experimentally

and to arrive at some suggestions with regard to establishment ofsurvival boundaries of a ship in a dynamic environment.


-To do experimental simulation of dynamic conditions in therectangular wave basin of Ocean Engg Centre at IIT Madras andsuggest the establishment of survival boundaries for merchant &Naval Vessels in damaged condition.


-Model of a bulk carrier ship fabricated to a scale of 1:100, with FRP.-The monohull fabricated using ship mould with longitudinal centreplane of separation.-Roll decay experiments conducted in the wave flume of OED, IIT

Madras.-Model was tested with & without bilge keels.-The roll damping coefficients obtained from the roll decay experimentsused in predicting the roll response of the model.-The analysis carried out for the case of nonlinear damping with quintic

moment

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Intact and damaged ship stability in a dynamic environment (AIntact and damaged ship stability in a dynamic environment (APreliminary Theoretical Study).Preliminary Theoretical Study).

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Dr. SC MisraDr. SC Misra

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT KharagpurIIT Kharagpur

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Aug 1999Aug 1999



To Study the Ship Stability in the dynamic environment one of theTo Study the Ship Stability in the dynamic environment one of the

important safety issue against capsizing.important safety issue against capsizing.


Delivering a software prediction tool based on experiments andDelivering a software prediction tool based on experiments andmethodology.methodology.


- A software has been developed based on experimental values toperform all Naval architectural calculations- Static stability calculations has been performed on two vessels - i.e.

Bulk Carrier and RORO Ship.- An observation has been made that vessels equilibrium position iscritical due to damage roll cycle bring openings on deck below watercausing progressive flooding and capsize


-Software has been developed based on several experiments on-Software has been developed based on several experiments on

the subject to perform all naval architectural calculation.the subject to perform all naval architectural calculation.

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PROJECT NO. 25 (HYDRODYNAMICS PANEL)

TITLE OF PROJECT:Wavelet Based Numerical Methods for Partial Differential EquationsGoverning Fluid Flow

NAME OF THE PRINCIPAL INVESTIGATOR-Prof. A Avudainayagam, Deptt ofMathematics

NAME OF INSTITUTE: Indian Institute of Technology (IIT), Madras

DATE OF COMMENCEMENT: Nov 1999

DATE OF COMPLETION: May 2002

AIM/OBJECTIVES:

To develop wavelet based numerical schemes for solution of partialdifferential equations and integral equations in fluid flow with focus inthree areas:-

Wavelet - galerkin scheme

Wavelets in domain decomposition methods

Multigrid methods using wavelets

ACHIEVEMENTS:

Development of new wavelet based multigrid methods for linear and

non linear elliptic partial differential equations Development of Danbechie wavelet based multi resolution time domain

scheme for undamped wave equation and Korteweg-devis equation

Wavelet compression using mat lab

Data dependent Hear-like wavelet transform for signal and imagecompression

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PROJECT NO. 27 (Scientific Computing Panel)

NAME OF THE PRINCIPAL INVESTIGATOR-Prof. Santanu Choudhary,Deptt of Electrical Engg, IIT DelhiProf. Subhasis ChoudhariDeptt of Electrical Engg, IIT Bombay

NAME OF INSTITUTE: IIT Delhi & IIT Bombay


DATE OF COMPLETION: Nov 2003

AIM/OBJECTIVES:

To develop Dynamic Hand Gesture Recognition System

To create a Remote Visualization Enhancement Using Gesture BasedInterface


Development of techniques for recognition of dynamic hand gesture

Development of contour based recognition scheme for gestureconstitute of distinct epoches of hand shapes

Development of robust appearance based tracking scheme to overcomethe problem of landing deformations

Design of prediction verification based gesture recognition scheme to

work modulo deformations in hand shape Development of gesture based interface for tele-visualisation

application using real time gesture recognition scheme

ACHIEVEMENTS:

Development of an appearance based predictive tracking scheme fortracking deformables

Development of prediction verification based approach for recognitionof complex gesture

Design & fabrication of a mobile robust

Development of a gesture based tele-visualisation interface using themobile robot

SUGGESTED END USE:

Development of gesture based application specific interface

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PROJECTPROJECT NO. 28 (Hydrodynamics Panel)


Experimental Study on MHD Propulsion for Naval Vessels.Experimental Study on MHD Propulsion for Naval Vessels.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof TS SheshadriProf TS Sheshadri

NAME OF INSTITUTE:NAME OF INSTITUTE: IISc, BangaloreIISc, Bangalore

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Nov 2000Nov 2000

DATE OF COMPLETION:DATE OF COMPLETION: May 2003May 2003


-To develop and study the MHD propulsion intended for Naval-To develop and study the MHD propulsion intended for NavalVesselsVessels

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:-To design, fabricate and test the MHD propulsion concept in water.-To design, fabricate and test the MHD propulsion concept in water. This concept is to use radical and axial currents to generate anThis concept is to use radical and axial currents to generate an azimuthally magnetic field, which accelerated the current carryingazimuthally magnetic field, which accelerated the current carryingwater out of the propulsor at high velocity as in a jet.water out of the propulsor at high velocity as in a jet.

ACHIEVEMENT:ACHIEVEMENT:

- E- Experimental facility set up consisting of:1. Two 1000 liters tanks connected by two tubes at the

same height2. MHD Propulsor in one tube.

3. Ventury in the other tube for measuring velocity of watermoving from tank to other

- Experiments conducted with different MHD propulsion units withInput level from 1kw to 3.5kw- Acceleration of water could not occur as per calculations & thrustlevel obtained was 25% of calculated thrust.


System can be used as to propel the Naval VesselsSystem can be used as to propel the Naval Vessels..


- Redesign and testing of the MHD propulsor to obtain the calculated- Redesign and testing of the MHD propulsor to obtain the calculatedperformance using a powerful electromagnet.performance using a powerful electromagnet.- Since magnetic field strength was not strong enough, sufferconducting electromagnets are required for MHD thruster system.- Redesigning & testing of MHD propulsor suggested using apowerful electromagnet

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TITLE OF THE PROJECT:TITLE OF THE PROJECT:Investigation of Randomized and Quantum Algorithms

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. Ramesh Hariharan

NAME OF INSTITUTE:NAME OF INSTITUTE: IISc., Bangalore

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: JAN 2001

DATE OF COMPLETION:DATE OF COMPLETION: MAR 2005

AIM/OBJECTIVES OF THE PROJECT:AIM/OBJECTIVES OF THE PROJECT:-To study two powerful paradigms of algorithm design andcomputing emerged in recent times (Randomized & QuantumComputation).

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:-To get a good understanding of the mathematical tools andtechniques of randomization.-To identify problems from various domains includiong dataadministration and perception learning.-To conduct workshops/courses for scientists and Navy officers andacademicians/researchers.


-Objectives stated above achieved.-Workshop on Algorithms & Complexity held for DRDOscientists/Naval officers on 13-14 Sep 2001.-Course conducted on Cryptography on 25-26 Jun 2004 for DRDOScientists/Naval Officers.-02 day workshop on Networking conducted on 18-19 Mar 2005.-provided a general framework for images considering these assignals defined over direct product of scale and projective space.


-The work with some orientation can be used for Missile GuidanceProgrammes.


-Projective space framework needs to be evolved intensively.-The image generation model may be incorporated in the Wienerfilter based prediction strategy.


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PROJECT NO. 30 (OCEAN ENVIRONMENT PANEL)

TITLE OF PROJECT:Depth and Range Dependent Acoustic Propagation in OceanicWave Guards by the Finite Element Method

NAME OF THE PRINCIPAL INVESTIGATOR-Prof. SK Bhattacharya & Prof. CP Vendhan

NAME OF INSTITUTE: Indian Institute of Technology (IIT), Madras

DATE OF COMMENCEMENT: Apr 01

DATE OF COMPLETION: Oct 05

AIM/OBJECTIVES:

Depth and Range dependent properties of Sea water

Depth and Range dependent properties of the upper sea-bed sedimentlayer

Variation in bottom topography


Develop suitable axisymmetric fluids finite elements

Identify suitable realistic and idealized ocean sediment parameters, e.g.for mud, sand etc. for both compressional waves and shear waves,including attenuation data.

Develop the finite element code Develop mesh generation and result viewing pre and post processor

tailoring existing software to suit the need of the project

Pub together a set of benchmark problems from ocean acoustics

Validate the finite element code

Attend to special problems, e.g. shallow water propagation,convergence zone propagation, effect of realistic bottom profile etc.

ACHIEVEMENTS:

Development on a comprehensive finite element computation capability for

sound propagation from a harmonic point source in inhomogeneous waveguide accounting for range & depth dependent properties.

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PROJECT NO.: 33 (Ocean Environment Panel)

TITLE OF THE PROJECT:Theoretical Studies on Acoustic scattering from objects in a NoiseField in the Ocean

PRINCIPAL INVESTIGATOR : Dr. Purnima Jalihal

INSTITUTE : NIOT, Chennai

DATE OF COMMENCEMENT : JUN 02

DATE OF COMPLETION : Jul 05


To carry out theoretical study on scattering from under water objectssubjected to ambient noise


Fabrication of object of different geometries & materials & capturescattering from them in lab settings

Numerical Modeling of ambient noise & capture the scatteringpattern

Insight study into mathematical, numerical & experimental methodsfor scattering from underwater objects subjected ambient noise.

ACHIEVEMENTS: Formulation of scattered pressure from a solid elastic sphere

Assessment of scattering from a solid body by scattered field from asolid elastic body subjected to ambient noise

Hollow balls (shells) scatter more than solid ones, larger hollow ballsscatter more than smaller one, hollow PVC balls scatter more thanhollow brass balls, solid brass balls scatter more than solid PVCballs & inferred that filtering technique for the merged signal isneeded to simulate realistic conditions

Result from theory & numerical simulations coincide for the case ofrigid sphere & rigid cylinder independent of the radius of the object

& the incident frequency Experimentation showed that scattering increase with increased

frequency (above 15-20 kHz additional increase is negligible),scattering decrease with height above the cylinder and at certaindistance from the edys of the cylinder higher dB levels are noticed.These can help in detection.


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PROJECTPROJECT NO. 34 (Scientific Computing panel)


Exploration of feasibility of solving large scale (10~5 nodes)Exploration of feasibility of solving large scale (10~5 nodes)network flow problems through circuit simulation.network flow problems through circuit simulation.

NAME OF THE PRINCIPAL INVESTIGATOR:NAME OF THE PRINCIPAL INVESTIGATOR: Prof. H NarayananProf. H Narayanan

NAME OF INSTITUTE:NAME OF INSTITUTE: IIT BombayIIT Bombay

DATE OF COMMENCEMENT:DATE OF COMMENCEMENT: Apr 02Apr 02

DATE OF COMPLETION:DATE OF COMPLETION: Jun 04Jun 04


-Feasibility study of the solution of a large min-cost network flow-Feasibility study of the solution of a large min-cost network flowproblem by electrical network methods, which enable to use theproblem by electrical network methods, which enable to use theNewton Raphson (NR) procedure on the network replacing the ideaNewton Raphson (NR) procedure on the network replacing the ideadiode by an approximatediode by an approximate


-To study the feasibility of solving min cost flow problems through-To study the feasibility of solving min cost flow problems through circuit simulation methods.circuit simulation methods.


- Devised a preliminary dedicated solver for diode circuit- Algorithm tested for solution of minimum flow problem onrectangle grid networks of size up to 10~5 Nods.- Simulator designed for NR corrosion problem


This can be a tool for research and industrial engineers whoThis can be a tool for research and industrial engineers whoencounter min-cost flow problems while modeling practical problem.encounter min-cost flow problems while modeling practical problem.

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PROJECT NO.: 35 (Hydrodynamics Panel)


3D Sea Keeping Computation of Conventional & High SpeedVessels

PRINCIPAL INVESTIGATOR: Prof. Debabrata Sen, Deptt of OE & NA

INSTITUTE : IIT Kharagpur


DATE OF COMPLETION: May 07


To develop a numerical solution scheme for computing motions ofTo develop a numerical solution scheme for computing motions ofconventional as well as fast surface vessels using full 3-dimensionalconventional as well as fast surface vessels using full 3-dimensionalflow theory based on a 3-D solution method.flow theory based on a 3-D solution method.


Extension literature survey

Establishment of method of computation based on time-domain(transient) green function

Examine suitability of above method

Development of 2 D strip-theory based method & code for motioncomputation of planning hulls

ACHIEVEMENTS:

Development of the 3D computation method

Mathematical Formulation of the hydrodynamic probable

Development of 2D strip-theory based method

Application of 3-D method at high Froude numbers

2D method implemented in the form of a computer program calledFASTHULL, run for a Wigley Hull

Inferred that 2D approval is attractive from computational cost paintof view


An adequate industry level simulation model could be developed fora direct calculation purpose from the present model.

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Characterization of Ambient Noise in Indian Seas

PRINCIPAL INVESTIGATOR : Dr. G Latha

INSTITUTE : NIOT, Chennai

DATE OF COMMENCEMENT : Jul 03

DATE OF COMPLETION : Jul 06


Charcterization of the Ambient Noise in Indian Seas off Chennai &Charcterization of the Ambient Noise in Indian Seas off Chennai & Goa.Goa.


Periodical collection of ambient noise in shallow water region offChennai & Goa and Characterization of the ambient noise withrespect to contributing parameters

Development of an automated noise measurement system forautonomous noise data collection in the sea

ACHIEVEMENTS:

Periodical ambient noise data collection for a period of 01 year

Developed an ambient noise buoy, consisting of an Automated DataAcquisition System (ADAS). This is designed & developed in house& is incorporated with Ambient Noise Buoy

Deployment of the Buoy for continuous measurement of noise in thesea off Chennai coast & obtaining measurement successfully

Data shows that noise field is temporarily coherent

Identified Noise due to bubbles & analysed from continuousmeasurements

Characterization of noise field carried out.

LIKELY APPLICATION OF THE OUTCOME/

SUGGESTION FOR FUTURE WORK:

Further work A subsurface based system for automated noisemeasurement in the form of NRB Project no. 75 in progress, sinceDec 06, to overcome the vulnerability of existing Buoy by fishingcommunity.

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TITLE OF THE PROJECT:

Geo-acoustic inversion of seismic survey data by matched FieldProcessing

PRINCIPAL INVESTIGATOR : Prof. GV Anand

INSTITUTE : IISc Bangalore

DATE OF COMMENCEMENT : Sep 03

DATE OF COMPLETION : Apr 07


Development of Inversion Techniques for estimating geo-acousticDevelopment of Inversion Techniques for estimating geo-acousticparameters of the upper layers of the ocean from seismic surveyparameters of the upper layers of the ocean from seismic surveydata collected by ONGCdata collected by ONGC


SNR enhancement through wavelet denoising

Development of multi-frequency & wide band MFP

Development of new wavelet domain MFP technique & theirperformance analysis

ACHIEVEMENTS:

Inversion of field data gathered by ONGC done using hybrid SA.Investigation carried out using multi frequency data

Effect of shear waves in the sediment & feasibility of estimating theshear speed & shear wave attenuation parameters studies

Genetic algorithm, simplex GA, and Adaptive simplex simulatedannealing method implemented

Some inversion performed using noisy synthetic data

Range dependent inversion has been done combining the data fromshorts 5, 50 and 95 for the entire range covered by these shorts.

LIKELY APPLICATION OF THE OUTCOME/

SUGGESTION FOR FUTURE WORK:

If the ocean bottom is range dependent, the no. of parameters to beestimated could be large enough & inversion process becomes timeconsuming. Parallel processing can be developed to reduce thecalculation time.


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TITLE OF THE PROJECT:

Identification and modeling of Internal Waves

PRINCIPAL INVESTIGATORs : Prof. AD Rao, IIT Delhi: Dr. TV Ramana Murty, NIO (RC)Visakhapatnam: Dr. KVSR Prasad, Andhra University,

DATE OF COMMENCEMENT : Dec 03

DATE OF COMPLETION : May 07


Identification and modeling of internal waves in the Bay of Bengalwith an ultimate usage for Naval application


Identification of internal waves through in-situ observation (NIO)

Identification of internal waves signature using satellite data

Development of numerical model for the generation and propagationof internal waves

ACHIEVEMENTS:

Dominant observed frequencies of Iws found to be between 0.02-0.4

cph (LF) and 0.7-8.0 cph (HF) Very strong gradient observed in the sound velocity in the top &

bottom layer during post-monsoon & late winter season

Internal waves off Bay & Bengal during late winter appear to begenerated by the bottom

Numerous SAR images of different missions analyzed for seasurface signature of Iws in North Bay of Bengal since 1991

The POM Model has been implemented suitably for the last coast ofIndia using an appropriate grid & bathymetry.

Numerical modeling carried out for the coast of India, in corporatingtidal forcing at the eastern open boundary

Energy associated with the Iws is essentially in the LF range The maximum energy seems to be in the thermoling region

Suggest that the energies associated with LF spectrum campass wellwith the observation

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LIKELY APPLICATION OF THE OUTCOMESUGGESTION FOR FUTURE WORK

Study should cover more space & time to arrive at more judiciousconclusions

More in-situ time series observations are required using thermistorchain & CTD

Experimental verification with the 2D wave spectra is to be carriedout with normal calculated observation

Inclusion of non-hydrostatic pressure in necessary for propermodeling the physics of Internal waves.

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PROJECT NO.: 44 (Material Panel)


Electromechanical Actuators with Ultra High Strain Piezoelectricproperties based on Relaxor Ferroelectric Single Crystals and largegrained Ceramics

PRINCIPAL INVESTIGATORs : Prof. TRN Kutty & Prof. KBR Varma,Material Research Centre

INSTITUTE : IISc Bangalore

DATE OF COMMENCEMENT : Jan 04

DATE OF COMPLETION : May 07


Development of material with ultrahigh strains of electromechanicalresponse in electrostrictive/piezoelectric behaviour

Prototype electro mechanical actuator devices from these material

Build up research expertise on relaxer ferroelectric material with thedesired electro-mechanical properties

ACHIEVEMENTS:

Investigation carried out on poly-crystalline PMNT piezoceramics

with relaxer ferroelectric properties. Large grain sizes could beachieved.

Fabrication of grain oriented PMNT ceramics accomplished by thetempleted grain growths having (001) orientation as well as by thedirectional solidification of the melt with (211) orientation

Vertical furnace with two zone & rotary health arrangement designed& developed

X-ray diffraction studies reveal the pressure of two phase region forsample containing higher PT contents

Melting behaviour of the PMNT with variable PT content worked outat high temperature.


The presently worked out materials are direct replacement for PZTceramics because of much larger piezo electric coefficient

Useful in Piezoelectric devices in their widest sense of application


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Present work is directly related to smart material & structures havingcapability of sensing external stimuli by way of mechanical orelectrical stress

Active structural timing & damping, vibration suppression etc. arepossible from structural engg

Application related to functional devices with resonator or filter

characteristic are possible in sonic or ultrasonic frequencies forelectronic application

Miniaturization of all types of piezo electric devices are possible bysubstituting PZT with PMNT as the base material

Likes end users are for defence as well as civilian application

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Marine Organism Mediated Bio-degradation of Polymers

PRINCIPAL INVESTIGATOR : Prof. Mukesh Doble & Dr. R Venkatesan

INSTITUTEs : IIT Madras & NIOT Chennai

DATE OF COMMENCEMENT : Sep 05

DATE OF COMPLETION : Mar 07


To study Marine based microorganism for the biodegradation ofLDPE & HDPE, which form marine debris/waste, and create seriousproblem to the Marine & coastal habitats


To test the biodegradability of LDPE & HDPE by various marinebased micro organism in the lab

To identify the best organism & carry out similar studies undermarine condition

Optimization of degradation condition

Identification of extra nutrients needed for bioremediation

Identification of possibility of bioaugmentation

Characterization of microbial metabolites involved in degradation

ACHIEVEMENTS:

Unpretreated thermally pretreated pure LDPE & HDPE andunpretreated starch blend LDPE investigated with marineuniorganism for a period of 01 year under various conditions usingsea medium with polymer as role carbon source

Marine microbial degradation of LDPE & HDPE analysed throughphysico chemical & mechanical changes taking place in thepolymers

Inferred that micro organism specifically are very important for thestudies of biodegradation. By taking an appropriate micro organism

having capability to utilize PE wastes for its survival alongwith theblends and pretreatment, time taken for ultimate degradation can bereduced.

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Pretreatment strategy should be carried out before dumping waste inocean waters

Starch blending of polymers should be encouraged, keeping

mechanical properties intact Screening of newer favourable organism from the ocean should be

taken up for biodegradation

Focus towards understanding the mechanism & identifying enzymesinvolved.

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ex summary completed projects 31aug06

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