Thursday, July 20, 2017

New M.Tech. Thesis Submitted from Production

EXPERIMENTAL INVESTIGATIONS FOR DEVELOPMENT OF BIOCOMPATIBLE FEEDSTOCK FILAMENT COMPRISING OF PVC, PP AND HAp FOR FDM by Nishant Rajan 

Abstract
Twin-screw extrusion (TSE) is one of the commercially established processes for reinforcement of metallic/non metallic/ ceramic fillers in polymer matrix. In this study, biocompatible feedstock filament has been prepared (in-house) for commercial fused deposition modelling (FDM) setup with biocompatible grade polymers, namely: polyvinyl chloride (PVC) and polypropylene (PP) which is reinforced with the Hydroxyapatite (HAp). In this study, mechanical, thermal and metallurgical properties have been established and best-feed stock filament wire for development of partial/complete denture on the FDM with functionally graded surfaces properties have been recommended for future applications. The process parameters were optimized using Minitab software based on Taguchi L18 orthogonal array and results are supported by photomicrographs.

Monday, July 17, 2017

New M.Tech. Thesis Submitted from Production

INVESTIGATIONS FOR DEVELOMENT OF 3D SCAFFOLDS BY USING IN-HOUSE FDM FILAMENT COMPRISING OF PVC, PP and HAp by Ravinder Sharma 

Abstract
The fused deposition modelling (FDM) has emerged as one of the most widely used process for fabrication of 3D functional/non-functional prototypes. The process has been commercially used for various applications in the field of architectural, structural or biomedical engineering (with the aid of various commercially available polymeric materials like ABS, Nylon etc.). All these filaments are available in market ‘as patented material’ and thus add to high cost of the final product (especially, when one is interested in bio-compatible features of the polymeric materials). In this present research work an effort has been made to develop a bio-compatible FDM filament comprising of PVC, PP and HAp, which has been further used to fabricate 3D porous structures. The various input process parameters of FDM (like: infill percentage, layer thickness, and deposition speed) were selected and their effects have been studied with the help of design of experimentation. Further theses process parameters have been optimised for various mechanical, dimensional, surface and thermal properties using analysis of variance. The results of the study highlighted that the infill density and layer thickness have majorly contributed towards the tensile properties (peak load, break load, peak elongation, break elongation and yield stress), whereas infill percentage has major contribution on the surface roughness and hardness of the fabricated parts. The deposition speed has least effect on the mechanical and surface properties of the specimens. The dimensional accuracy has been majorly affected by the deposition speed of the FDM. The SEM microphotographs show that the FDM fabricated 3D structures are having open porous and fibrous structure and hence can be applied for bio-medical applications. Finally the thermal analysis (on DSC) ensures the thermal stability of the material for dental applications.

Tuesday, July 11, 2017

New M.Tech. Thesis Submitted from cse

TEXT TO SPEECH CONVERSION FOR PUNJABI USING FORMANT SYNTHESIS TECHNIQUE by Ruhi Rani 

Abstract
This thesis work is done with the purpose of generating Punjabi sound. For this the formant synthesis
technique is used. The Punjabi text is given as input to the system. The provided text to the system is first analyzed and converted into the required form for generating the synthetic speech. For this, a phonetic tool PRAAT is used. The sound units for Punjabi are scripted with their various characteristics such as pitch, bandwidth and formant frequency. With the help of various rules the text that is provided to the system is converted in to the smallest unit that is letters. The scripts are written in PRAAT tool for these letters and then the code is written for the concatenation of these letters so that the final synthetic speech is generated. Thus the high quality speech is generated as an output of the system.

Tuesday, July 4, 2017

New M.Tech. Thesis Submitted from civil

EFFECT OF CONFINEMENT USING GFRP WRAP ON STRENGTH PROPERTIES OF CONCRETE REPLACING COARSE AGGREGATES WITH BRICK BALLAST by Gagandeep Singh 

Abstract
Concrete of grade M25 was produced and the study on response of the concrete under compressive loading was done by partially replacing the coarse aggregate by brick ballast. The percentage by which the coarse aggregate were replaced by brick ballast was 0%, 20%, 30% and 40% (by weight). The strength properties of the concrete with brick ballast were then compared with conventional concrete samples. Compressive strength of concrete made by brick ballast surpassed the compressive strength of conventional concrete by 22%. Single and double GFRP wraps were used to confine the brick ballast concrete and comparison of compressive strength was studied with the conventional and brick ballast concrete (without wrap). Results showed that with the increase in confinement using wraps the brittle failure gets reduced thereby increasing the compressive strength. By using the brick ballast as replacement of coarse aggregate, concrete produced is lighter in weight in comparison to the conventional concrete, by 7% if 40% coarse aggregates are replaced by the brick bats. If concrete with the brick ballast is used practically than dead load will also get reduced, hence giving a more economical and sustainable solution to building industry

Wednesday, May 24, 2017

New M.Tech. Thesis Submitted from Electrical

VOLTAGE PROFILE IMPROVEMENT AND POWER LOSS REDUCTION IN POWER DISTRIBUTION SYSTEMS USING PARTICLE SWARM OPTIMIZATION by Mandeep Kaur 

Abstract : The power distribution systems are becoming bulky day by day due to the increase in electricity demand; therefore, it becomes necessary to maintain the power distribution systems so that they can meet the customer demand. Power losses are the major concern in the electrical power system. Uptill now, many techniques are available for the reduction of these losses but capacitors are considered as a simple and most powerful device. If capacitor is utilized in a wise way, we may obtain maximum benefits like voltage profile improvement, power loss reduction, the annual cost reduction due to losses and enhancement in the net annual savings. In this thesis work, an artificial intelligence technique known as Particle Swarm Optimization have been used for the allocation of capacitors. The most sensitive buses which can lead to maximum benefits are selected on the basis of their loss sensitivity factors and cost function. After the selection of these buses, capacitors are placed on them. These two methodologies are performed on the basis of an algorithm which consists of a sequence of steps and henceforth, it is tested on IEEE 39-bus system. The algorithm is implemented in the form of MATLAB coding which results into improved voltage profile and efficient loss reduction. Particle swarm optimization is an iterative method, hence it will goes through effective number of iterations in order to get the global best result.

Tuesday, May 23, 2017

New M.Tech. Thesis Submitted from Electronics

DESIGN AND OPTIMIZATION OF RADAR ABSORBING MATERIAL WITH THE HELP OF RESISTOR FSS by Ravinderjit Kaur

Abstract
RADAR absorption materials (RAMs) and coatings have been widely used in stealth technology since World War II. Stealth refers to the ability to evade from the detection from any kind of radar detection. Radar absorbing materials have found a significant importance in today’s stealthy technologies to make the combat aircrafts or drones electromagnetically invisible to the radar detectors. So a combat aircraft can be useful in the war field only if it is not detectable by sensors and moreover the capacity load it can hold to carry maximum armed forces and ammunitions. Therefore, numerous research works have been done to pursue a high-performance absorber to solve the electromagnetic pollution problem. Earlier different types of paints were used to coat the surfaces of the aircrafts, also known as black body paints. But paint not only used to make the aircraft heavier but would also incur unnecessary costs. With the advancement it has been invented that instead of painting the surface, the surface itself be made up of radar absorbing material. Various designs were also proposed in this regard but of hardly any use, as they also were not able to reduce detection to great extent. Then with further advancement it has been invented that the frequency selective surface embedded in the layers of radar absorbing material has better absorption than the normal ones. But
till now the proposed different geometric structures or the use of lumped elements in the material so far has one or the other limitation. So this work has been proposed to find the best trade off between the maximum absorption bandwidth and minimum material thickness with the use of particle swarm optimization and also compares the results of with and without lumped elements. The proposed comparison and results of optimization are in good agreement.

New M.Tech. Thesis Submitted from Industrial

IMPLEMENTATION OF SAFETY MANAGEMENT IN INDIAN INDUSTRIES : A CASE STUDY) by Sushil Kumar 

Abstract
The purpose of the study was to reduce or eliminate the accidents during production processes in “Shivalik Bimetal Controls Limited”. Which was on higher side and wasting lot of money of the organization, In general observation it is noticed that the company has been facing so many issues in their production (like; accidents, absenteeism, low production rate, improper handling) due to the lack of proper safety measures. The study uses Root Cause Problem Solving (RCPS) technique and starts with the collection phase, followed by the analysis phase and ends with the solution phase. Supporting data are presented using a Pareto Chart to highlight accidents in order to be more focused for elimination or reduction. The Q.C. tool is performed to analyse the cause of accidents, to express and implement corrective actions. The application of the Q.C tools in a manufacturing industry (Shivalik Bimetal Controls Limited) provides a fact-based and organised approach to the problem identification. Corrective action had enhanced the production and reduced the accidents from 35% to 12.6% which was the 70% of the total accidents and it helped to increase the productivity of the organization. The study was also proved that industrial safety training with sound understanding of manufacturing coupled with possible solutions using safety management tools. This corrective action was not only able to reduce accidents, but also upgraded the product quality.

Tuesday, May 16, 2017

New M.Tech. Thesis Submitted from Civil

ANALYSIS OF LIQUEFACTION POTENTIAL SOIL USING SPT DATA by Arveen Kaur 

Abstract
Liquefaction is the result of undrained failure of saturated, highly contractive (loose sand). When this phenomenon occurs, there are drastic changes to structures which results in loss of life and property. The factors which affect the liquefaction potential are relative density, depth of water table, grain size distribution of soil, confining pressure, peak pulsating stress, amplitude and frequency of shaking, distance from earthquake. The liquefaction hazards are commonly associated with saturated or silty sands having low plasticity and density. In the present study, the SPT data is collected from various resources majorly from Testing & Consultancy cell, Civil engineering department, GNDEC, Ludhiana. Out of the available sites, total 80 Sites borehole data was taken and was selected for further work. Then this selected data was analysed using Liqit Software and same data is calculated on spreadsheets by NCEER Youd et. al methods. Also, the comparison has been made on the basis of factor of safety from Liqit and spreadsheet values. The comparison was represented by graphs for each site. The major work of the thesis was to plot the liquefaction map on GRASS GIS software. The maps were generated depth wise on GRASS GIS software. This gives an edge over one single value of depth. Hence, consecutive depths were chosen to give a broad view of the work done. The detailed analysis of how to generate the Graph is also mentioned and given in Annexures. Basic overview of Liqit software is also given in annexure. This thesis will cover as much region as possible for each district in Punjab. Some sites data was discarded due to their very close proximity with other sites

New M.Tech. Thesis Submitted from Industrial

APPLICATION OF VALUE ENGINEERING: A CASE STUDY OF COUPLER FOR BEDDED VALVES by Kulpreet Singh 

Abstract
It is becoming essential to develop new alternatives with lesser cost,but giving same or better performance in current competitive environment. Every industry strives hard to meet the requirements of customers and to reduce production cost. Value engineering is a scientific tool for improving value potential, reducing cost while meeting the functional utility. In present work Value Engineering Job Plan (VEJP) was used to reduce the qualitative cost of manufacturing of coupler. The study was carried out at Sir Valves, Jalandhar. The poor value areas were highlighted and worked upon. Changes in design were proposed leading to 4.18 per cent of savings.

Tuesday, April 25, 2017

New M.Tech. Thesis Submitted from Production

STUDY THE EFFECT OF DIFFERENT WIRE ELECTRODES ON MACHINING CHARACTERISTICS OF INCONEL825 WITH WEDM By Maninderpreet Singh

Abstract
Scientists across the world have developed many super alloys, which are of high strength and heat resistant for use in industries aerospace and defence. Ni-based alloys are resistive to degradation in oxidizing and eroding environment, have high strength even at high temperatures. Many high performance wires have been developed over the time to enhance the performance of WEDM machining process. The aim of our study was to investigate the еffеct of process parameters on the performance characteristics of WЕDM for Nickеl-basеd alloy material, with brass wire and diffusion annealed wire. The specimen was prepared and preliminary еxpеrimеnts were conducted, to identify the machining parameters and decide the ranges and levels of each machining parameter. Then main experiment was conducted by machining the specimens using different wire еlеctrodеs and record the machining performances. Detailed еxpеrimеntation was based on Taguchi design of еxpеrimеnts to analyse the impact on various responses by machining parameters. The results of the experimentation were analysed using SEM and ANOVA analysis to show the significant variations in response parameters with different wire electrodes. The experimental results revealed that wire wear and cutting rate are maximum with diffusion annealed. The surface roughness produced by plain brass
wire is higher than the surface roughness produced by diffusion annealed wire

Thursday, April 6, 2017

New M.Tech. Thesis Submitted from Production

ANALYTICAL MODELING OF INPUT ENERGY CONSUMPTION,SURFACE ROUGHNESS AND MATERIAL REMOVAL RATE IN BALL END MILLING OPERATION by Aashish Dhiman

Abstract
Ball end milling operation is commonly used for producing flat and contoured surfaces of manufacturing dies and moulds etc. due to its high quality and productivity nature. It is very sensitive
manufacturing operation because of complex tool geometry and involvement of large number of process parameters. The energy consumption, surface quality and Material Removal Rate (MRR) play a vital role for any manufacturing process to be sustainable. The present work presents an analytical approach to predict energy consumption, surface roughness and MRR during ball end milling operation. The modeling procedure begins with analytical prediction of uncut and cut chip geometry followed by the evaluation of the associated angles and further determination of the cutting forces. These cutting forces, cutting speed and milling time were used to calculate the energy consumption during the operation. In analytical model of surface roughness, the cusp height was calculated from topography of the surface produced by the ball end mill tool geometry which was further used to calculate the theoretical average surface roughness (��). The analytical models of MRR were developed from geometry and the impressions left by the ball end mill on the work surface. Experiments were performed using 6 mm diameter ball end mill on CNC Vertical Milling Center on EN8 material work piece for different speeds (1000, 1500, 2000 RPM), different feed rates (400, 600, 800 mm/min) and different depth of cuts (0.10, 0.15, 0.25 mm) to validate the proposed analytical models. The radial depth of cut was kept 1 mm during all experiments. The proposed analytical model of energy consumption shows comparatively higher error than the error found by calculating energy consumption based upon cutting forces model available in literature (Sonawane and Joshi, 2010) for EN8 material whereas it shows comparatively less error for Inconel 718 material. An error of 94.044 % to 122.793 % and -52.593 % to -28.705 % had been observed in predicting surface roughness and MRR respectively by the proposed analytical models. The results predicted by the proposed analytical models of surface roughness and MRR matches exactly with the expected results of surface roughness and MRR presented in Table 1 in the research paper by Quintana et al. (2010) but the final equations for these models by them not give satisfactory results. The effect of the various machining variables on the different input and output parameters predicted by the proposed models comes out to be of the same trend as observed in the literature.

Friday, March 3, 2017

New M.Tech. Thesis Submitted from Civil

PERFORMANCE EVALUATION OF RO PLANTS IN MALWA REGION by Hardeep Singh 

Abstract
There has been a continuous decrease in the availability of fresh water resources for daily routine purposes nowadays and in the recent past especially in developing countries. Though the urban areas have well developed facilities for fresh water availability but the major issue is in the rural areas which are deprived of both centralized and decentralized treatment facilities. One such region is the Malwa region of Punjab state where high water contamination problems have been incurred. These regions were equipped with high RO plants by the government of Punjab in 25 villages with one RO system for each village in order to provide proper drinking water supplies for the inhabitants. But the regions were still continuously faced with health problems. So this study was conducted in order to evaluate the performance of RO systems in five such villages by collecting water samples from the RO inlet, pure and rejected RO waste and also determining their effect on the surrounding ground water by collecting samples along the RO site periphery at distances of 200-800 feet at an interval of 200 feet each which has a bore hole depth of 40-60 feet. Further this study assessed the power consumption and running costs of these RO systems and hence evaluating their overall performance efficiency in terms of treatment efficiency, impact on the surrounding ground water resources and their power consumption and hence running costs. The results showed that the TDS and sulphate values almost doubled in each case of RO reject as compared to RO inlet which could be a reason for increase in the TDS and sulphate values in the surrounding areas signifying the negative effect of RO reject on the surrounding ground water. Likewise, the hardness, fluoride and chloride content showed
a significant increase in RO reject which could again be linked to their increased values in the surrounding ground water. The contamination in the surrounding area due to RO reject could be linked to the diffusion of contaminants. Also, the RO pure showed the presence of total coli form in the drinking water which was to get treated by UV lamp and hence raises a question on the RO working. However, turbidity, pH and nitrate did not show much variation in the inlet and reject values but the nitrate value was more than the permissible value. Further, the comparison of values of the east and west direction and also of north and south direction gave an indication of the hydraulic gradient of the areas which was again a reason for increased values in one particular direction. The cost analysis showed that approx. 60,000 rupees are spent by the government on one RO plant monthly. The study concluded that in spite of a lot of expenditure by the government on these RO plants, their performance is not up to the mark; instead they have served as a source of increasing ground water pollution which calls for a need of further treatment of RO reject water. 

Wednesday, February 8, 2017

New M.Tech. Thesis Submitted from Computer Science

SVM BASED SPOKEN NUMERALS RECOGNITION FOR PUNJABI LANGUAGE by Satbir Kaur 

Abstract
The advances in digital signal processing technology had led the introduction of speech processing in several applications like speech compression, enhancement, synthesis, and recognition. In this thesis the problem of speech recognition is studied and a speaker dependent, medium vocabulary, isolated numerals speech recognition system has been developed for Punjabi language. The study implements the Support Vector Machine based isolated numerals speech recognizer in three steps. The primary step performs the end point detection, framing and windowing of the speech signal. The second step includes speech feature extraction using Mel Frequency Cepstral Coefficients. Finally, in the last step the Support Vector Machine is primarily used as recognizer and classifier for numeral of Punjabi language. The system is ready to understand the spoken utterances in Punjabi language, by removing the unwanted noise and unsuitable data from the speech signal and then translating the speech wave into quality of feature vectors. These vectors are given to SVM to predict the spoken word in written form. The Support vector machine classifier is wide used and given high accuracy. SVM has the ability to deal with high dimensional knowledge and is used in many real world problems like text categorization, character recognition and classification.