International Journal of Advances in Engineering Sciences
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Optimization of Process Parameters for Friction Stir Welding AA7075/10%wt.SiC Fabricated Composite
Get PDFObjective of this investigation are fabrication of AA7075-10%wt.SiC Aluminum Metal Matrix Composite and determine the optimal process parameters of Friction Stir Welded AA7075-10%wt.SiC Composites.Composites were prepared by the mechanical stircasting process. Experiments were performed with fourprocess parameters such as tool rotational speed, weldspeed, axial force and tool geometry considering threelevels of each. The quality characteristics considered aretensile strength (T.S).The Welding experiments wereconducted using L 27 orthogonal array. A combination oforthogonal array and design of experiments was used togive best possible welding parameters that give optimalTensile strength of joints were evaluated. The fabricatedwelded joints using rotational speed of 1500rpm, weldingspeed (1.3mm/sec), axial force(7k/n) of and toolgeometry(Square) gives best possible results.Experimental result reveals that the tool rotation speed,welding speed and axial force are the significant processparameters affecting the welding performance. Thepredicted optimal value of tensile strength is 307.48MPa.The confirmation tests also have been done forverifying the results. The impact of responses were alsobe investigated by Scanning Electron Microscopic (SEM)analysis
Survey of Energy Efficient Clustering Mechanisms in Wireless Sensor Networks
Get PDFAdvancements in wireless communications and Micro-Electro-Mechanical structures have enabled the improvement of wireless sensor networks (WSN), which in flip have fostered the emergence of a plethora of programs in diverse fields together with agriculture, healthcare supervision, and transportation systems. However, because of the strength dilemma of battery-powered sensors, these packages nonetheless face a major energy issue that save you their giant adoption. In this thesis, we contributed to conquer this challenge via several contributions. In this paper we've got surveyed the various techniques to power efficient strategies in wi-fi sensor networks
EFFICIENT SCALE INVARIENT FEATURE BASED METHOD FOR CROWD LOCALIZATION
Get PDFVisual surveillance has been a very active research topic in the last few decade due to growing importance for security in the public areas. With the increasing number of CCTV networks in public areas, the enhancement in the computing power of modern computers and increase the possibility to entrust an automatic system with the security and the monitoring of events involving large crowds is within reach. Crowd detection and localization in the surveillance video is the first step in automatic crowd monitoring system. The performance of the whole system depends on this step. Detecting the crowd is a challenging task because the crowds come in different shape, size and color, against cluttered background and varying illumination conditions. As the size of the crowd increases managing the crowd becomes more complex
Survey on Image intensification using Canny Edge Technique
Get PDFImage Processing is generally done in form of Signal Processing. In this images, pictures, video frame etc are given in Input form and the Output appears with certain set of features or parameters in relation to the input given. Edge Detection using Canny Technique is an set of Mathematical Functions whose main goal is to detect points in the Digital input i.e. image and detect how brightness changes variably , and where are discontinuities. Edge detection is an essential stage in processing the image. Mostly image-processing techniques consider the image as a two-dimensional signal then put standard signal-processing techniques to it. Generally it means Digital Image being processed but analog and digital signals can also be processed
VANET: Analysis of Black hole Attack using CBR/UDP Traffic Pattern with Hash Function and GPSR Routing Protocol
Get PDFWith momentum of time huge development occurred in the field of MANET and VANET. As we know when new technology emerges it came with many advanages but definitely some limitation must be there. In WSN security is one of biggest challenges which we need to tackle to implement adhoc network. Main reason behind this is dynamic topology of sensing node because nodes are dynamic in nature rather than static. As technology came into existence side by side unethical activity also take place which try to access the data illegally to gain personnel profit. There are so many types of attack possibilities are there in adhoc network. Attack can be classified into active and passive. In our research article oue main concern is on black hole attack. According to this attack a malicious node with high priority number is deployed in between other nodes. Now this malicious node access the data and sends acknowledgement to source that data received. Source node will think that acknowledgement is sent by destination node but actually it is sent by malicious node. In this research article performance analysis of the black hole attack in Vehicular Ad Hoc Network is executed
Survey of Vertical Handoff Decision Criteria in LTE Cellular Networks
Get PDFVertical handover advantage brilliant importance because of the upgrades in mobility fashions by way of the Fourth era (4G) technology. A handover desire scheme in LTE networks both based totally on unmarried or multiple criteria. The wide variety of standards is right away depending on the overall handover time. In addition, the time required for deciding on a target network at some point of handover is also extended with the growth in a number of parameters. Conventional handover choice Strategies are specifically based at the unmarried parameter. But, with the advent of heterogeneous Wi-Fi networks, the overall performance of those unmarried parameter choice schemes is highly decreased. Consequently, researchers introduce multirequirements handover selection schemes. those enhancements are restricted to specific situations and for this reason do now not offer help for mounted mobility. Further, numerous schemes are proposed
Vertical Handoff Decision Criteria with LTE Network
Get PDFA handover decision scheme in LTE networks either based on single or multiple criteria. The number of criteria is directly depending on the totalhandovertime.A vertical handover decision algorithm based on the fuzzy control theory. The algorithm takes into consider the factors of Power Level, Cost and Bandwidth. After establishing the membership functions, membership degrees of corresponding factors can be determined, which are processed by the Weight Vector. Finally, the Fuzzy Vertical Handoff Decision Vector is derived and vertical handover decision can be made. It is shown through simulation that the algorithm realizes the optimized vertical handover by evaluating and analyzing various input parameters
A SYSTEM WITH GUARANTEE PERIOD AND TWO TYPES OF REPAIR
No full textA two-unit cold standby system with guarantee period and two types of repair is analysed and profit is evaluated. If a unit fails before completion of guarantee period (after completion of guarantee period) then it is repaired by manufacturer (management) at his own cost. The system is analysed using semi-Markov processes and regenerative processes. Various measures of system effectiveness are determined
PROFIT ANALYSIS OF A TWO – UNIT COLD STANDBY SYSTEM WITH INSTRUCTION AND PREPRATION TIME FOR REPAIR
No full textThe cost benefit analysis of a two unit cold standby system with instruction and preparation time for repair is carried out. The repair man (who is an expert) does not come alone but he comes with his assistant. If the expert repair man is busy in repairing a failed unit and second unit fails then the assistant repairman repairs the latter unit after getting instructions from expert repairman. Various measures of system effectiveness are found using regenerative point technique. Graphs are plotted for a special case
Evaluation of packet forwarding of GPSR in VANET
No full textVanet is vehicular adhoc network for communication between moving vehicles and roadside infrastructure. One of the most efficient routing protocol, GPSR is evaluated for packet forwarding approach. As it send data to the node which is closest to the destination node. In this paper we change the transmission range of node and check the performance using metrics parameter packet delivery ratio, loss ratio, end to end delay, routing overhead. And it is found that with increase in transmission range total received Packets, PDR increase which is good. With increase in transmission range Loss ratio decrease and end to end delay remain almost constant