Optimization of feed force, tangential force and surface roughness by using grey based Taguchi method

This study investigated the optimization of turning process parameters such as cutting speed, feed rate and depth of cut on EN-19 material using the Grey Relational Analysis (GRA) method. Twenty seven experimental runs based on an orthogonal array of Taguchi method were performed. The feed force (F X), tangential force (FY) and surface roughness (R a) were selected as the quality targets. An optimal parameter combination of the turning operation was obtained using GRA. By analyzing the grey relational grade matrix, the degree of influenced for each controllable process factor onto individual quality targets can be found. The depth of cut is identified to be the most influence on feed force and tangential force, and feed rate is the most influential factor to the surface roughness. Additionally, the analysis of variance (ANOVA) was also applied to identify the most significant factor; the depth of cut is the most significant controlled factor for the turning operation according to the weighted sum grade of the feed force, tangential force and surface roughness

Analysis and Prediction of feed force, tangential force, surface roughness and flank wear in Turning with uncoated carbide cutting tool using both Taguchi and Grey based taguchi method

The aim of the present study is to investigate the effects of process parameters (cutting speed, feed rate and depth of cut) on performance characteristics (tangential force, feed force, surface roughness and flank wear ) in turning of EN-19 steel with uncoated carbide cutting tool. Experiments are designed and conducted based on Taguchi's L27 orthogonal array carried out under dry cutting conditions for tangential force, feed force and surface roughness, whereas for the flank wear the experiments are conducted as per L9 orthogonal array. The responses are feed force, tangential force, surface roughness and flank wear were recorded for each experiment The depth of cut was identified as the most influential process parameters in the responses of both tangential force and feed force. The feed rate was identified as the most influential process parameter on the surface roughness, while the cutting speed has a significant contribution for flank wear. Grey relational analysis is used to optimize the multi-performance characteristics to minimize the tangential force and surface roughness. The feed rate was identified as the most influential process parameter in the responses of both tangential force and surface roughnes

Distance spectra of some double join of graphs and some new families of distance equienergetic graphs

In this paper we compute the spectrum of a special block matrix and use it to describe the distance spectra of some double join of graphs. As an application, we give several families of distance equienergetic graphs of diameter 3

A Survey of Energy Harvesting Sources for IoT Device

Environmental Energy is an alternative energy for wireless devices. A Survey of Energy Harvesting Sources for IoT Device is proposed. This paper identifies the sources of energy harvesting, methods and power density of each technique. Many reassert have carried to extract energy from environment. The IoT and M2M are connected through internet or local area network and these devices come with batteries. The maintenance and charging of batteries becomes tedious due to thousands of device are connected. The concept of Energy harvesting gives the solution for powering IoT, M2M, Wireless nodes etc. The process of extracting energy from the surrounding environment is termed as energy harvesting and derived from windmill and water wheel, thermal, mechanical, solar

A prospective analysis of the cost-effectiveness of alfuzosin, tamsulosin and silodosin for 12 weeks in benign prostatic hyperplasia

Background: Benign prostatic hyperplasia (BPH) is usually seen in men above 45 years. α-blockers (alfuzosin, tamsulosin and silodosin) form the mainstay of pharmacological management of symptomatic BPH and may differ in their efficacy, tolerability and treatment costs. The present study compares them prospectively to evaluate the most cost-effective α-blocker in the management of BPH.Methods: Ninety subjects diagnosed with symptomatic BPH were randomised to receive alfuzosin, tamsulosin or silodosin and were followed up at 2, 4, 8 and 12 weeks after treatment initiation. Effectiveness was assessed by rate of treatment success and number of symptom free days (SFDs). Treatment related direct medical, direct non-medical and indirect costs were analysed both from patient and third-party perspective. Cost-effectiveness was assessed using average cost-effectiveness ratio (ACER) and incremental cost-effectiveness ratio (ICER).Results: With rate of treatment success as the outcome measure, alfuzosin had the least ACER, followed by tamsulosin and silodosin. With number of SFDs as the outcome measure, alfuzosin had the least ACER followed by silodosin and tamsulosin. An additional INR 3982 and INR 30 were required per extra success and extra SFD respectively with alfuzosin when compared to tamsulosin. Alfuzosin dominated silodosin as a more cost-effective option in achieving treatment success. However, an additional INR 231 was required to achieve an extra SFD with silodosin.Conclusions: Compared with tamsulosin and silodosin, alfuzosin seems to be the most economical α-blocker in the management of BPH, both from patient and third-party perspective.Short duration of study of 12 weeks was a limitation in the present prospective study

Implementation of Fuzzy Based Simulation for Clone Detection in Wireless Sensor Networks

Wireless sensor networks are usually left unattended and serve hostile environment, therefore can easily be compromised. With compromised nodes an attacker can conduct several inside and outside attacks. Node replication attack is one of them which can cause severe damage to wireless sensor network if left undetected. This paper presents fuzzy based simulation framework for detection and revocation of compromised nodes in wireless sensor network. Our proposed scheme uses PDR statistics and neighbor reports to determine the probability of a cluster being compromised. Nodes in compromised cluster are then revoked and software attestation is performed.Simulation is carried out on MATLAB 2010a and performance of proposed scheme is compared with conventional algorithms on the basis of communication and storage overhead. Simulation results show that proposed scheme require less communication and storage overhead than conventional algorithms

EFFICIENT E-MRZT ALGORITHM BASED TREE CONSTRUCTION TECHNIQUE FOR ZIGBEE MOBILE WIRELESS NETWORKS

In Wireless Personal Area Networks (WPANs), the Zigbee protocol/IEEE 802.15.4 standard is a protocol specification for low range, less cost and low power systems. The Zigbee network is usually constructed using cluster trees for the purpose of performing data delivery among nodes and for power saving. Here the data delivery failures occur due to node mobility. In order to handle node movements so as to increase data delivery we use mobility-robust tree construction technique with clustering mechanism. In this paper we propose an E-MRZT (Extended MRZT) algorithm. We collect information about regularity of mobility patterns and by using this history, perform data delivery. We employ a clustering mechanism in our network to obtain a set of cluster trees; each with a specific mobility pattern. The entire setup is developed and simulated by using NS2 network simulator. The result is that we obtain mobility-robust tree with a considerable increase in data delivery

Prevailing breast feeding practices of infants attending paediatric out-patient department

Background:Objectives of current study were to know the prevailing infant feeding practices in infants and to identify the problems affecting infant and young child feeding practices and to analyze the environmental factors influence the mothers, families and caregivers in infant feeding.  Methods:The present study is a hospital based observation study. A total of 501 mothers and their infants attending new born paediatric OPD, immunization clinic of department of paediatrics for various reasons of health care were recruited for the study after their informed consent and institutional ethical clearance. Information about the first feed after birth, time of initiation of breastfeeding, duration of exclusive breast feeding, time of introduction of complementary feeding, knowledge of feeding skills, mother’s concept of adequacy of breast milk were collected in the structured, pre tested proforma by personal one to one interview with the mothers. All the mothers of infants from 0 to 1 year were included. Statistical analysis: The data obtained by the interview were analyzed with regarding to mothers education level, religion and other related parameters pertaining to feeding practices. Percentages of parameters were calculated and analyzed.  Results:Majority of the mothers belong to the age group of 18 to 30 years (96.01%), prelacteal feeds were given by a good number of mothers (42.32%), 60.66% mothers were given the sugar water as the prelacteal feed and 71.56% mothers have used cup and spoon to give prelacteal feeds. 75.25% of the mothers have practiced giving colostrum, 72.26% of mothers were breastfeeding their baby for 5 to 10 minutes during each feed at an interval of 0.5 hours to 3.5 hours. Majority of mothers (34.73%) had the knowledge of starting of weaning at six months and 46.88% of mothers were giving weaning food twice daily.Conclusion:Significant number of mothers had discarded colostrum and most of the mothers intended to give only breast milk upto four months and they did not have correct knowledge regarding exclusive breastfeeding upto six months.