Paper Title

INFRARED SPECTRA OF LITHIUM BORATE GLASSES DOPED WITH MODIFIER IONS

Abstract

The aim of this study is to investigate the infrared spectra of Li2O-B2O3 glasses doped with modifier ions ZnO, CaO and CdO. Glasses with composition 30 Li2O-10 MO-60 B2O3 doped Modifier ions (where MO=ZnO, CaO and CdO) were prepared by using the melt quenching technique. Differential scanning calorimetry in the temperature range 30-750 oC reveals that homogenous glasses are formed and glass forming ability is more in ZnB glass samples. FTIR spectra in the wavelength range 400-4000 cm-1 reveals the presence of BO3 and BO4 units in the glass network by introduction of modifier ions.

KeyWords:Differential scanning calorimetry, Infra-red spectra, Borate glasses, melt quenching method.

Paper Title

EXPERIMENTAL STUDY OF INFLUENCE OF MAGNETIC FIELD ON THE SURFACE TENSION OF WATER

Abstract

Influence of magnetic field on the surface tension of water was studied. An electromagnet Model EMU-50 was used for magnetic treatment of water. Water was magnetized by applying a magnetic field of strength ranging from 0 (no magnetic field) to 900 Gauss. Time of exposure was varied from zero to one hour. Surface tension was measured after every increment in the strength of magnetic field and time of exposure. Each experiment was repeated for three times and changes in properties were noted. The results showed decrease in surface tension of water sample compared to control. Such type of effect of magnetic field on pH and electrical conductivity of water is also reported in literature.

KeyWords:Surface Tension, pH, Electrical Conductivity, Magnetic Field, Electromagnet.

Paper Title

POLARIZATION SIGNATURE – COFFEE SAMPLES COMPARISON

Abstract

Mueller Matrix imaging polar metric technique was used to understand the polarization property of coffee sample, a complete Mueller polarimeter of coffee sample is obtained using the technique. The potential application of this in optical characterization and discrimination of coffee sample with a reference to the elemental composition of sample is described.
A highly collimated monochromatic and polarized beam with predefined states of polarization from a source was incident on surface of coffee powder sample, from the reflected beam using appropriate optics and states of polarization, the variation of polarization in the sample was recorded as image and translated into a signature matrix. Image processing algorithms are established for obtaining 16 elemental Mueller Matrix images that are verified theoretically to meet the conditions of a complete polarimeter. The obtained images were processed using polar decomposition technique to determine the normalized elemental Mueller Matrix which was further used to understand the Depolarization, Diattenuation and Retardance coefficients in the sample.

KeyWords: Mueller Matrix Imaging, Optical signature, Polarization states, Coffee sample.

Paper Title

PHYSICO-CHEMICAL ANALYSIS OF GROUND WATER QUALITY OF DHROL

Abstract

Ground water samples were collected from diverse spaces of Dhrol taluka of Jamnagar district (India) for investigation of their physicochemical parameters. These Fifteen water samples from diverse spaces were analyzed for their physicochemical characteristics. Local community utilized this water for drinking and irrigation purpose. Laboratory investigations were carried out for analysis like, Temperature, Calcium-Magnesium hardness, pH, TDS, Chloride, Alkalinity, sulphate, phosphate and nitrate. These parameters are effectiveness in calculating quality of ground water. The key plan of our study is to find the quality of ground water in and around Dhrol taluka and formulate it for drinking purposes after appropriate purification.

KeyWords: Dhrol taluka, Physiochemical parameters, Ground Water.

Paper Title

ACTIVE FILTERING CAPABILITY FOR WECS WITH DOUBLY FED INDUCTION GENERATOR BY USING GSC

Abstract

This paper deals with the operation of Doubly Fed Induction Generator (DFIG) with an integrated active filter capabilities using Grid Side Converter (GSC). The main contribution of this work lies in the control of GSC for supplying harmonics in addition to its slip power transfer. The Rotor Side Converter (RSC) is used for attaining maximum power extraction and to supply required reactive power to DFIG. This Wind Energy Conversion System (WECS) works as a Static Compensator (STATCOM) for supplying harmonics even when the wind turbine is in shut down condition. Control algorithms of both GSC and RSC are presented in detail. Proposed DFIG based WECS is simulated using MATLAB / Simulink. A prototype of a proposed DFIG based WECS is developed using a DSP (Digital Signal Processor). Simulated results are validated with test results of the developed DFIG for different practical conditions such as variable wind speed and unbalanced/single phase loads.

KeyWords: DFIG, WECS, Nonlinear load, Integrated Active Filter, Power Quality.

Paper Title

DESIGN & ANALYSIS OF HIGH-GAIN DC–DC CONVERTER FOR PV SYSTEM ARCHITECTURE

Abstract

The number of large-scale solar photovoltaic (PV)systems continues to increase, while the size of the largest systems has already reached several hundred megawatts. This trend will challenge existing PV system architectures and will require new PV system architectures with higher power ratings and higher voltage levels at the point of common coupling (PCC). This paper reports a medium-voltage (MV) dc-bus PV system architecture based on a high-gain soft-switched interleaved boost (SSIB) dc–dc converter. The interleaved characteristic increases the flexibility of the converter, allowing for either a higher voltage and/or current rating, thus increasing the power rating of the converter. The high-gain capability of the SSIB converter allows it to be connected directly to an MV dc bus. This will facilitate direct connection of a PV system to an MV ac grid (i.e., 20 kV) using only one step-up transformer. Simulation and experimental results are presented to verify the operation of the SSIB converter and to confirm the steady-state and dynamic performance of the proposed PV system architecture.

KeyWords: DC–DC power converters, large-scale systems, photovoltaic (PV) systems, power conversion.

Paper Title

VOLTAGE UNBALANCE AND HARMONICS COMPENSATION FOR ISLANDED MICROGRID INVERTERS

Abstract

Voltage source inverters (VSIs) are usually used for all kinds of distributed generation interfaces in a microgrid. It’s the microgrid’s superiority to power the local loads continuously when the utility fails. When in islanded mode the voltage and frequency of the microgrid are determined by the VSIs, therefore the power quality can be deteriorated under unbalanced and nonlinear loads. A voltage unbalance and harmonics compensation strategy for the VSIs in islanded microgrid is proposed in this paper.. In this paper, a control strategy with low bandwidth communications for paralleled three-phase inverters is proposed to achieve satisfactory voltage unbalance compensation. The proposed control algorithm mainly consists of voltage/current inner loop controllers, a droop controller, a selective virtual impedance loop, and an unbalance compensator. The inner loop controllers are based on the stationary reference frame to better mitigate the voltage distortion under nonlinear loads. Droop control and selective virtual impedance loop achieve accurate current-sharing when supplying both linear and non- linear loads. Moreover, by adjusting voltage references according to the amplitude of the negative sequence voltage, the unbalance factor, which is mainly caused by single phase generators/loads, can be mitigated to an extremely low value. Finally, an AC microgrid which includes three three-phase three-leg inverters was tested in order to validate the proposed control strategy.

KeyWords: Microgrids, voltage unbalance compensation, virtual impedance, droop control.

Paper Title

ENCRYPTION AND DECRYPTION BASED INFORMATION SECURITY IN BIG DATA

Abstract

The growing popularity and development of data mining technologies bring serious threat to the security of individual’s sensitive information. An emerging research topic in data mining, known as privacy preserving data mining (PPDM), has been extensively studied in recent years. The basic idea of PPDM is to modify the data in such a way so as to perform data mining algorithms effectively without compromising the security of sensitive information contained in the data. Current studies of PPDM mainly focus on how to reduce the privacy risk brought by data mining operations, while in fact, unwanted disclosure of sensitive information may also happen in the process of data collecting, data publishing, and information (i.e., the data mining results) delivering. In this paper, we view the privacy issues related to data mining from a wider perspective and investigate various approaches that can help to protect sensitive information. In particular, we identify four different types of users involved in data mining applications, namely, data provider, data collector, data miner, and decision maker. For each type of user, we discuss his privacy concerns and the methods that can be adopted to protect sensitive information. We briefly introduce the basics of related research topics, review state-of-the-art approaches, and present some preliminary thoughts on future research directions. Besides exploring the privacy-preserving a approaches for each type of user, we also review the game theoretical approaches, which are proposed for analyzing the interactions among different users in a data mining scenario, each of whom has his own valuation on the sensitive information. By differentiating the responsibilities of different users with respect to security of sensitive information, we would like to provide some useful insights into the study of PPDM.

KeyWords: Data mining, sensitive information, privacy-preserving data mining, anonymization, provenance, game theory, and privacy auction, anti-tracking.

Paper Title

A POINT-TO-POINT BASED CLOUD WORKFLOW SYSTEM

Abstract

Workflow systems are designed to support the process automation of large scale business and scientific applications. In recent years, many workflow systems have been deployed on high performance computing infrastructures such as cluster, point to point , and grid computing. One of the driving forces is the increasing demand of large scale instance and data/computation intensive workflow applications (large scale workflow applications for short) which are common in both e-Business and e-Science application areas. The data and computation intensive pulsar searching process in Astrophysics. Generally speaking, instance intensive applications are those processes which need to be executed for a large number of times sequentially within a very short period or concurrently with a large number of instances. Therefore, large scale workflow applications normally require the support of high performance computing infrastructures (e.g. advanced CPU units, large memory space and high speed network), especially when workflow activities are of data and computation intensive themselves. In the real world, to accommodate such a request, expensive computing infrastructures including such as supercomputers and data servers are bought, installed, integrated and maintained with huge cost by system users.

Paper Title

VIRTUALIZATION BASED SCHEDULING ALGORITHM FOR PARALLEL DISTRIBUTED COMPUTING

Abstract

In this paper, we design a new virtual queue-based back-pressure scheduling algorithm (VBR) for achieving significant delay reduction in parallel distributed computing. Our algorithm design comes from an observation that classical back-pressure scheduling algorithm usually needs a long period of time to form a queue backlog-based gradient in a network, which decreases towards the sink in the network, before achieving stable packet delivery performance. To address this issue, VBR is designed to pre-build proper virtual queue-based gradient at nodes in a parallel distributed computing, which is chosen to be a function of traffic arrival rate, link rate, and distance to sink, in order to be adaptive to different network and application environments while achieving high network performance. Moreover, the queue backlog differential between each pair of neighbor nodes is decided by their actual queue lengths and also their virtual queue lengths (gradient values). We prove that VBR can maintain back-pressure scheduling’s throughput optimality. Simulation result shows that VBR can obtain significant performance improvement in terms of packet delivery ratio, average end-to-end delay, and average queue length as compared with existing work.

KeyWords: Back-pressure scheduling Delay reduction parallel distributed computing

Paper Title

STRATEGIES FOR OPTIMAL TRAFFIC FLOW IN MULTINODE AD-HOC WIRELESS SENSOR NETWORKS

Abstract

Due to heavy usage of data/voice transmission, the burstness in buffers and the packets dropout is a common problem in communication networks. To have an optimal utilization of resources and to improve the Quality of Service (QoS), the communication networks are to be designed with new strategies. Stochastic models provide the basic frame work for design and development of new communication networks. This paper addresses the problem of reducing burstness in buffers by introducing a communication network model with integration of three strategies of traffic flow transmission namely, dynamic bandwidth allocation (DBA), phase type transmission and direct arrivals to the multiple buffers. Here, the packet arrivals are characterized through compound Poisson Binomial process since the features of arrival of packets closely resembles by its characteristics. A mathematical model is developed and analyzed for a multi node Ad-hoc wireless communication system having dynamic bandwidth allocation (DBA) and phase type transmission with direct arrivals to the multiple buffers from outside resources in addition to the first buffer in bulk. The performance of the model is evaluated by deriving the system performance measures such as mean content of the buffers, mean delays in transmission, throughput of the buffers.

KeyWords: Wireless Communication Network, Phase type transmission, Dynamic bandwidth Allocation, direct arrivals to multiple buffers, compound Poisson binomial process.

Paper Title

OPTIMIZED RESULTS USING FAST NEAREST NEIGHBOR KEYWORD COVER SEARCH

Abstract

Now days there are many modern android applications that aim to find out objects satisfying both spatial predicate and a predicate on their associated texts. In this paper, for finding nearest ATM CENTERS a simple solution is introduced which relies on IR2 tree [1].IR2 tree includes few deficiencies that affect its efficiency [2]. To increase the efficiency a new method called spatial inverted index [1] is introduced that extends the standard inverted index to address multidimensional information. This new SI(selection index) method comes with algorithms which will answer nearest neighbor queries with keywords in real time. As verified by experiments, this projected technique performs the IR2 tree in query time reaction very significantly.

KeyWords: Keyword Search, Spatial Inverted Index. Information Retrieval Tree, selection index method .

Paper Title

PROCESS CONTROL FOR SOFTWARE PROCESS IMPROVEMENTS IN GLOBALLY DISTRIBUTED PRODUCT DEVELOPMENT

Abstract

Consecutively to develop, build and deploy quality software faster and more economically, Software companies in industrialized countries are grouped into globally distributed package development Organization. Typically, package systems have a protracted period, of a minimum of many years, throughout that such systems are unit upgraded and increased with additional options, and complimentary as completely different versions. Changes, enhancements, and enhancements resulting in new package style releases because a computer code to evolve. As a result, a computer code must be updated and altered persistently over the amount of your time that a system lives. Therefore, the package business has recently begun to adopt an additional standard or Component-Based (CB) design that facilitates development of package merchandise with a protracted period. Package method enhancements framework (SPI) is that the main key purpose for enhancements of the performance of the package method. SPI implementation is additional involved with the people that develop comes in distributed environments. During this development we have a tendency to took AN analysis for the study of an outsized transnational company within which resulted within the SPI framework. So we have a tendency to introduced line managers World Organization has wider management over the highest level management.

KeyWords: Software process improvement (SPI), distributed teams, software engineering, process control, action research.

Paper Title

AN EFFICIENT RANKED KEYWORD SEARCH METHOD IN CLOUD ENVIRONMENT FOR PRIVACY-PRESERVING

Abstract

As data in cloud is outsourced documents require privacy preserving in an encrypted form. The data encrypted has a challenge as it documents are encryption which will require proper accuracy performance degradation. As he data is massive this has become more difficult .This makes it even more challenging to provide an efficient and reliable system to design a cipher text search scheme as online information retrieval on large volume of encrypted data. In this paper to support more search semantics, clustering method is proposed. To enable similarity search which is also efficient, data owner builds a secure index along with the encrypted data items is outsourced to the cloud server. Server performs searching on the index according to the queries of the data users without learning anything about the data other than what data owner allows an adversary to learn.

KeyWords: Cloud computing, cipher text search, ranked search, multi-keyword search, hierarchical clustering, security.

Paper Title

CONSTRUCTING THE BLUE PRINT OF RAPID REVERSE CONVERTER THROUGH THE PARALLEL PREFIX ADDER

Abstract

In this project, the analysis of residue number system reverse converters using the well-known regular and modular parallel pre-fix adders is presented. The VLSI implementation reduces delay and improves area×time2, at the cost of increased power consumption, which is the major cause for preventing the use of parallel-prefix adders to achieve high-speed reverse converters in nowadays systems. Thus, the problem of higher power consumption is solved by designing reverse converter using parallel pre-fix adder components which provide better tradeoffs, between delay and power consumption. In this work a new technique is proposed to design and implement the reverse converter which helps the designer to improve the performance of the reverse converter based on the target application and existing constraints. Numerous reverse converters for different moduli sets already existed, which can be categorized into three types. The first ype consists of converters with a tree of CSAs with EAC followed by a two-operand modulo 2k −1 CPA. A second type includes complex reverse converters, which have several CSAs and CPAs with EACs followed by a final regular subtractor with two operands of different size. The implementation of this subtractor using regular binary-adder results in one operand with some constant bits. The third type covers the reverse converters that have been designed for moduli sets with moduli other than the popular 2n and 2n ± 1. Hence a new technique is developed for the first and second types of reverse converters for applying the HMPE and HRPX in the reverse converter design is realized in VHDL. The power consumption values are calculated using TSMC 65-nm CMOS.

Keywords Digital arithmetic, parallel-prefix adder, residue number system (RNS), reverse converter.

Paper Title

THERMAL ANALYSIS OF IC ENGINE PISTON AND COMPARISON BETWEEN ALUMINIUM, ZIRCONIUM WITH TITANIUM COATINGS BY USING FEM

Abstract

Piston is the ‘heart’ of the automobile engine. It’s one of the key components of the engine and it’s working the hard condition which accelerated the piston wear and broken. A good design of the piston in this project is compared with existing piston to extend the Mean Time between Maintenance. In order to achieve the deformation, thermal and stress distribution of the piston, ANASYS software is used to analyze the piston under the thermal loads and mechanical loads. The results are shown that the temperature distribution occurs on the top of the piston when the piston under the thermal load and the greatest stress occurs on the piston pin when the piston under the thermal-structure coupling. The temperature distribution is conformed to the facts, but the greatest stress is a bit large when coupling.

Keywords piston design, coating materials, High strength alloys, FEA.

Paper Title

VARIOUS EFFECTS OF WELDING PARAMETERS ON TIG WELDING OF 2024-T3 CLAD ALUMINUM ALLOY PLATE

Abstract

To improve welding quality of Aluminum alloy (Al) plate an automated TIG welding system has been developed, by which welding speed can be control during welding process. Welding of Al plate has been performed in two phases. During 1st phase of welding, single side welding performed over Al plate and during 2nd phase both side welding performed for Al plate by changing different welding parameters. Effect of welding speed and welding current on the tensile strength of the weld joint has been investigated for both type of weld joint. Optical microscopic analysis has been done on the weld zone to evaluate the effect of welding parameters on welding quality. Micro-hardness value of the welded zone has been measured at the cross section to understand the change in mechanical property of the welded zone.

Keywords Automated TIG Welding System, Micro hardness Test, Tensile Test.

Paper Title

RESEARCH ON CONTENT BASED IMAGE RETRIEVAL USING COLOR AND SHAPE FEATURES OF WEB APPLICATIONS

Abstract

Content-Based image acts to get back (CBIR) uses the seeing what is in of an image such as color, form, feeling of a material, and spatial general design to represent and list of words in a book the image. action-bound make observations in CBIR is geared in the direction of the development of methodologies for getting at details, interpreting price listing and giving pointer image knowledge-bases. In addition to their development, efforts are also being made to value the operation of image acts to get back systems. The quality of move is heavily dependent on the good quality of the careful way used to produce point gives directions to be taken and likeness measure for comparison of points. In this paper we offered an algorithm which makes into company the more chances of different other algorithms to get well the having no error and doing a play of acts to get back. The having no error of color histogram based matching can be increased by using Color soundness guide (CCV) for coming one after another polish. The rate of motion of form based acts to get back can be gave greater value to by giving thought to as rough form rather than the certain, errorless form. In addition to this a mix of color and form based acts to get back is also included to get well the having no error of the outcome.

Keywords CBIR, Shape, Color Coherence Vector, Centroid.

Paper Title

RESEARCH ON WAVELETS BASED IMAGE RETRIEVAL SYSTEM FOR WEB APPLICATIONS OF COLOR FEATURES

Abstract

Image acts to get back (IR) is one of the most getting worked up and fastest growing make observations areas in the field of sound and view technology. We present here a high-light of nearby make observations for Ir. Some trends and probable future make observations directions are presented. We make open to the Major problems that we have took in: the feeble amount of a good measurement of seeing likeness, the little importance according to user effect on one another and take-back, and the not take care of spatial knowledge. answering these business houses, we make, be moving in the answers instrumented by nearby Ir systems. We also present the current image acts to get back projects in our laboratory, which are was the reason for to a greatly sized amount by these same points to be taken into account.

Keywords Image retrieval; DWT; Wavelet; Local feature; Color; Texture.

Paper Title

USER BASED COLLABORATIVE FILTERING RECOMMENDER SYSTEMS

Abstract

This document mainly discusses the building of a Recommender system to make predictions based on reviews of books. Given a user item pair our main goal is to predict whether the user purchased the item, to show user based collaborative filtering is a good approach we addressed this problem user three methods which are discussed in detail in the following sections.

Keywords personalized recommendation; jacquard similarity, user based recommendation, collaborative filtering.

Paper Title

ANALYSIS AND OPTIMIZATION OF PROCESS PARAMETERS IN LASER WELDING OF DISSIMILAR MATERIALS IN LAP JOINT

Abstract

The need of joining of dissimilar materials goes on increasing day by day in industry due to its high demand. Dissimilar joints are based on both technical and economical aspects, because they can provide satisfactory service performance and reasonable cost savings. The demand for such joints in industry is huge. For example, in power plant industry more than thousand dissimilar joints are used. Joints between dissimilar metals are particularly common in components used in the automotive, power generation, chemical, petrochemical, nuclear and electronics industries. Dissimilar spot welded joints of medium carbon and stainless steel are currently used for car body assembling. But dissimilar spot welding can be more complicated than similar welding because of different thermo-physical properties of metal and inevitably, various thermal cycle experienced by each metal. So, the study of dissimilar material welding is of a great interest for many of the researchers.
In this project two dissimilar materials namely AISI 316L and AISI 1552 were taken for laser welding in lap joint configuration. Three process parameters i.e. scan speed, pulse frequency and pulse diameter at four levels were taken for optimization. Two response parameters namely weld hardness and length of heat affected zone were considered for different combinations of process parameters. Grey Taguchi methodology with L16 orthogonal array and ansys software are was used to optimize specified parameters. It is found that laser welding with scan speed of 45 mm/min, pulse diameter of 0.3 mm and pulse frequency of 7 Hz yields the optimal quality characteristics. In these levels hardness of weld zone was found to be 304.77 HV and length of HAZ to be 0.0852 mm.

Paper Title

MULTI OBJECTIVE OPTIMIZATION OF CUTTING PARAMETERS IN MILLING OPERATION TO REDUCE TOOL VIBRATION AND CUTTING FORCES

Abstract

These days one of the most important machining processes in industries is milling. Milling is affected by many factors such as the cutting velocity, feed rate, depth of cut and geometry of cutting tool etc., which are input parameters in this project work. The desired product of dimensional accuracy and less surface roughness is influenced by cutting force and tool vibration which are the responses and the functions of these input parameters.
In this project work we determine the optimal setting of cutting parameters cutting speed (N) , depth of cut(d) , feed(f) and principal cutting edge angle (Φ) of the tool to get a minimum cutting force and tool vibration.
Tool vibration and surface roughness are two important parameters which affect the quality of the component and tool life which indirectly affect the component cost. In this paper, the effect of cutting parameters on tool vibration and surface roughness has been investigated during end milling of EN-31 tool steel. Response surface methodology (RSM) has been used to develop mathematical model for predicting surface finish, tool vibration and tool wear with different combinations of cutting parameters. The experimental results show that feed rate is the most dominating parameter affecting surface finish, whereas cutting speed is the major factor effecting tool vibration. The results of mathematical model are in agreement with experimental investigations done to validate the mathematical model.

Paper Title

MECHANICAL BEHAVIOUR OF METALS UNDER FRICTION STIR WELDING

Abstract

Friction stir welding (FSW) is a relatively new solid-state joining process that can be beneficially used for various transportation and defence applications. This joining technique is energy efficient, environment friendly, and versatile. In particular, it can be used to join high-strength aerospace aluminium alloys and other metallic alloys that are hard to weld by conventional fusion welding. FSW is considered to be the most significant development in metal joining in a decade. Understanding the microstructure evolution and properties of friction stir welded components is necessary to use this new process in critical structural applications. In this project we put forth the knowledge base regarding friction stir welding under static load which is performed on three different AL alloys namely Al-3003(H18), Al-6082(H30) and commercial grade. The effects of critical FSW process parameters were also studied. The resulting micro structural changes, micro hardness profiles and tensile testing have been reported. Comparison of micro hardness values has also been performed. The findings from these investigations will be presented and discussed.

Paper Title

FABRICATION AND MECHANICAL STUDIES OF FIBER REINFORCED POIYMER COMPOSITES

Abstract

Friction stir welding (FSW) is a relatively new solid-state joining process that can be beneficially used for various transportation and defence applications. This joining technique is energy efficient, environment friendly, and versatile. In particular, it can be used to join high-strength aerospace aluminium alloys and other metallic alloys that are hard to weld by conventional fusion welding. FSW is considered to be the most significant development in metal joining in a decade. Understanding the microstructure evolution and properties of friction stir welded components is necessary to use this new process in critical structural applications. In this project we put forth the knowledge base regarding friction stir welding under static load which is performed on three different AL alloys namely Al-3003(H18), Al-6082(H30) and commercial grade. The effects of critical FSW process parameters were also studied. The resulting micro structural changes, micro hardness profiles and tensile testing have been reported. Comparison of micro hardness values has also been performed. The findings from these investigations will be presented and discussed.

Paper Title

EVALUATION OF SURFACE ROUGHNESS AND MRR OF EN18 STEEL TOOL IN EDM PROCESS

Abstract

Electrical discharge machining is one of the earliest nontraditional machining, extensively used in industry for processing of parts having unusual profiles with reasonable precision. In the present work, an attempt has been made to model material removal rate, electrode wear rate, and surface roughness through response surface methodology in a die sinking EDM process. The optimization was performed in two steps using one factor at a time for preliminary evaluation and a Box-Behnken design involving three variables with three levels for determination of the critical experimental conditions. Pulse on time, pulse off time, and peak current were changed during the tests, while a copper electrode having tubular cross section was employed to machine through holes on EN 353 steel alloy work piece. The results of analysis of variance indicated that the proposed mathematical models obtained can adequately describe the performances within the limits of factors being studied. The experimental and predicted values were in a good agreement. Surface topography is revealed with the help of scanning electron microscope micrographs.
After the results have studied it is found out that current is most significant value followed by pulse time and duty cycle is least significant for both MRR and SR. both MRR and SR increased nonlinearly with the increases in current. As pulse time increases MRR decreases slightly and with increase in duty cycle it increases insignificantly. But SR first increases with increases in pulse time but after 500µs it decreases. For duty cycle also SR increases up to 65% then started decreasing.

Paper Title

OPTIMIZATION OF PROCESS PARAMETERS IN MICRO WIRE EDM BY USING TAGUCHI‟S AND GENETIC ALGORITHMS

Abstract

Wire electrical discharge machining process is a highly complex, time varying & stochastic process. The process output is affected by large no of input variables. Therefore a suitable selection of input variables for the wire electrical discharge machining (WEDM) process relies heavily on the operator’s technology & experience because of their numerous & diverse range. WEDM is extensively used in machining of conductive materials when precision is of prime importance. Rough cutting operation in wire EDM is treated as challenging one because improvement of more than one performance measures viz. Metal removal rate(MRR), surface finish & cutting width (kerf) are sought to obtain precision work. In this paper an approach to determine parameters setting is proposed. Using taguchi’s and Genetic Algorithm (GA) was employed to determine the values of optimal process parameters for the desired output value of wire electric discharge machining characteristics parameter design, significant machining parameters affecting the performance measures are identified as pulse peak current, pulse on time, and duty factor. The effect of each control factor on the performance measure is studied individually using the plots of signal to noise ratio. The study demonstrates that the WEDM process parameters can be adjusted so as to achieve better metal removal rate, surface finish, electrode wear rate.

Keywords: WEDM, Metal removal rate, surface finish, taguchi method, Design of Experiment, S/N ratio, Electrode wear rate.

Paper Title

A SHARED TACTIC TO STOCK DATA INTO CLOUD USING DATA OWNER’S ENCODE METHOD IN CRYPTOGRAPHY AREAS

Abstract

A vital challenge in creating file encryption schemes is based on the efficient control over file encryption keys. The preferred versatility of discussing any number of selected documents with any group of users demands different file encryption keys for use for various documents. The capacity of selectively discussing encoded data with various customers via public cloud storage may greatly ease security concerns over accidental data leaks within the cloud. However, this involves securely distributing a lot of keys for file encryption and check to customers, and individual customers will need to safely store the received keys, and submit a similarly many keyword trapdoors towards the cloud to be able to perform a search within the shared data. The safety analysis and grant faction evaluation both confirm that the suggested schemes are provably secure and practically efficient. The implied requirement for secure communication, storage, and complexity clearly renders the approach not practical. This paper addresses this practical problem, that is largely neglected within the literature, by suggesting the novel idea of key aggregate searchable file encryption (KASE) and instantiating the idea via a concrete KASE plan, where a data owner only must distribute just one answer to a person for discussing a lot of documents, and also the user only must submit a single trapdoor towards the cloud for querying the shared documents.

Keywords: Searchable encryption, data sharing, cloud storage, data privacy.

Paper Title

A CONCEPTUAL DESIGN OF PATTERN TO REPLACE INVESTMENT CASTING

Abstract

This project represents the loose-piece and piece-wise pattern manufacturing process as a new conceptual design of pattern to replace precision investment casting process. An object was prepared using the loose-piece pattern process and compared with the precision investment casting process. The analysis of results indicates that the investment casting process is a very slow and more expensive process due to the involvement of large manual labour and also due to the loss of wax in the process. The investment casting process is limited by the size and mass of the casting. While the loose-piece pattern is a low cost process and also a less time consuming process as compared to the precision investment casting process. The precision investment casting process attains better surface finish than the loose-piece pattern process. Although the loose piece pattern process does not attain a better surface finish than the precision investment casting process; nowadays good quality grinding machines is available, hence using good quality grinding machines a better surface finish can be achieved in the loose-piece pattern process.

Keywords: Precision Investment Casting, Loose-Piece Pattern.

Paper Title

METHODS OF DETECTION PLANT DISEASE

Abstract

Disease in plant cause major production and economic losses as well as reduction in both quality & quantity of agricultural products. In this paper we studied and evaluate existing techniques for detection of plant diseases by this method we monitoring plant health and detecting pathogens to reduce disease spread and facilitate effective management practices.
In order to minimize the disease include damage in crop during growth harvest and post-harvest processing as well as to maximize productivity and ensure agricultural sustainability some advanced disease detection and prevention in crops are imperative. This paper reviews the direct and indirect disease identification methods currently used in agriculture laboratory based technique such as polymerase chain reaction (PCR) immune fluorescence enzyme linked immunosorbent assay (ELISA) gas chromatography mass spectrometry are some direct method and indirect method includes hyper spectral technique thermography etc.

Keywords: Pathogens, immunofluorescence, Chromatography hyper spectral technique.

Paper Title

POWER ENHANCEMENT BY ADOPTING ACTIVE POWER FILTER SCHEME WITH FUZZY LOGIC CONTROL UNDER GRID DISTORTIONS

Abstract

Distribution line consists of a range of loads which are both linear and nonlinear, due to these nonlinear loads a harmonic current is developed at the source current which leads to detrimental disturbances, aging effect, poor power factor, and lower efficiency. Using active power filter is one of the viable solutions to eliminate power line harmonic currents generated by nonlinear loads and to improve the power factor. APF is operated in dual boost convertor mode with constant switching frequency by using one cycle control method. The advantages of going for this type of control are it requires source current only and voltage as reference. And flip flops are used to generate the pulse signal to the convertor which is connected in parallel with the distribution system. The inverter will provide phase shifting current. This phase shifted current is helpful in injecting and cancelling out the harmonic current and to achieve three phase unit power factor for the current to and from the powergrid. A DC capacitor is intended which acts as a source to the converter. In order to reduce the error and to produce firing signal, fuzzy logic based one cycle controller is used.

Keywords: Nonlinear loads, Active Power Filter (APF), Dual -Boost converter, One-Cycle control, fuzzy logic controller.

Paper Title

POWER ENHANCEMENT BY ADOPTING ACTIVE POWER FILTER SCHEME WITH FUZZY LOGIC CONTROL UNDER GRID DISTORTIONS

Abstract

Cutting fluid is a type of coolant and lubricant designed specifically for metalworking processes, such as machining and stamping. There are various kinds of cutting fluids, which include oils, oil-water emulsions, pastes, gels, aerosols (mists), and air or other gases. They may be made from petroleum distillates, animal fats, plant oils, water and air, or other raw ingredients. Depending on context and on which type of cutting fluid is being considered, it may be referred to as cutting fluid, cutting oil, cutting compound, coolant, Use of cutting fluids in machining processes can reduce the cutting temperature and provides lubrication to tool and work piece. These translate to longer tool life and improved surface quality. Metalworking fluids are a major cause of health hazards for operators apart from being sources of environmental pollution thus necessitating research in dry and minimum quantity lubrication (MQL) machining. The introduction of coolant techniques such as near-dry machining so called minimum quantity lubrication (MQL) and cryogenic coolant have shown promising performances especially in terms of cutting tool life. Nowadays, MQL is widely used in machining performances.

Keywords: Minimal quantity lubrication, ionic liquids, lubricants and machine.