Detection Of Defects On Weld Bead Through The Wavelet Analysis Of The Acquired Arc Sound Signal

Recently, the development of online quality monitoring system based on the arc sound signal has become one of the main interests due its ability to provide the non-contact measurement. Notwithstanding, numerous unrelated-to-defect sources which influence the sound generation are one of the aspects that increase the difficulties of applying this method to detect the defect during welding process. This work aims to reveal the hidden information that associates with the existence of irregularities and porosity on the weld bead from the acquired arc sound by applying the discrete wavelet transform. To achieve the aim, the arc sound signal was captured during the metal inert gas (MIG) welding process of three API 5L X70 steel specimens. Prior to the signal acquisition process, the frequency range was set from 20 Hz to 10 000 Hz which is in audible range. In the next stage, a discrete wavelet transform was applied to the acquired sound in order to reveal the hidden information associated with the occurrence of discontinuity and porosity. According to the results, it was clear that the acquired arc sound was not giving an obvious indication of the presence of defect as well as its location due to the high noise level. More interesting findings have been obtained when the discrete wavelet transform (DWT) analysis was applied. The analysis results indicate that the level 8 of the approximate and detail wavelet coefficient have given a significant sign associated with the presence of irregularities and porosity respectively. Moreover, despite giving the information on the surfaces pores, the detail wavelet coefficient was found to give a clear indication of the sub-surface porosity formation during welding process. Hence, it could be concluded that the hidden information with respect to the occurrence of discontinuity and porosity on the weld bead could be obtained by applying the discrete wavelet transfor

Self-Consistent C-V Characterization of Depletion Mode Buried Channel InGaAs/InAs Quantum Well FET Incorporating Strain Effects

We investigated Capacitance-Voltage (C-V) characteristics of the Depletion Mode Buried Channel InGaAs/InAs Quantum Well FET by using Self-Consistent method incorporating Quantum Mechanical (QM) effects. Though the experimental results of C-V for enhancement type device is available in recent literature, a complete characterization of electrostatic property of depletion type Buried Channel Quantum Well FET (QWFET) structure is yet to be done. C-V characteristics of the device is studied with the variation of three important process parameters: Indium (In) composition, gate dielectric and oxide thickness. We observed that inversion capacitance and ballistic current tend to increase with the increase in Indium (In) content in InGaAs barrier layer.Comment: 5 pages, ICEDSA conference 201

Importance of Spoken English Language in our Professional Development and Life

 Spoken English Language has become the life blood of our professional development and social life. In the worldwide market place spoken English has emerged as the lingua franca. There is a huge and growing demand, for training in Spoken English skills from individuals and companies in all sectors and in all parts of the world. The Importance of Spoken English Language in this age of globalization is essential. English language is the most important language of communication between different countries. UN has recognized 5 languages as its official languages one of them English takes the 1st position. English is spoken by communities on every continent and on oceanic islands in all the major oceans. English is the dominant international language in science, business, aviation, entertainment, and diplomacy, and also on the Internet. In most fields of work your ability to speak English can help you advance your career; helping you get the job you want and earn more money. No matter what your area of expertise, skill in English will contribute substantially to your success. Speaking and understanding English will allow a person to communicate with each other, besides this it offers you more chances of doing professional jobs not in your own country but around the world

In_xGa_{1-x}Sb MOSFET: Performance Analysis by Self Consistent CV Characterization and Direct Tunneling Gate Leakage Current

In this paper, Capacitance-Voltage (C-V) characteristics and direct tunneling (DT) gate leakage current of antimonide based surface channel MOSFET were investigated. Self-consistent method was applied by solving coupled Schr\"odinger-Poisson equation taking wave function penetration and strain effects into account. Experimental I-V and gate leakage characteristic for p-channel InxGa1-xSb MOSFETs are available in recent literature. However, a self- consistent simulation of C-V characterization and direct tunneling gate leakage current is yet to be done for both n- channel and p-channel InxGa1-xSb surface channel MOSFETs. We studied the variation of C-V characteristics and gate leakage current with some important process parameters like oxide thickness, channel composition, channel thickness and temperature for n-channel MOSFET in this work. Device performance should improve as compressive strain increases in channel. Our simulation results validate this phenomenon as ballistic current increases and gate leakage current decreases with the increase in compressive strain. We also compared the device performance by replacing InxGa1-xSb with InxGa1-xAs in channel of the structure. Simulation results show that performance is much better with this replacement.Comment: 7 pages, EIT 2012 IUPUI conferenc

Noise-Induced Hearing Loss (NIHL) Prediction in Humans Using a Modified Back Propagation Neural Network

Noise-Induced Hearing Loss (NIHL) has become a major source of health problem in industrial workers due to continuous exposure to high frequency sounds emitting from the machines. In the past, several studies have been carried-out to identify NIHL industrial workers. Unfortunately, these studies neglected some important factors that directly affect hearing ability in human. Artificial Neural Network (ANN) provides very effective way to predict hearing loss in humans. However, the training process for an ANN required the designers to arbitrarily select parameters such as network topology, initial weights and biases, learning rate value, the activation function, value for gain in activation function and momentum. An improper choice of any of these parameters can result in slow convergence or even network paralysis, where the training process comes to a standstill or get stuck at local minima. Therefore, this current study focuses on proposing a new framework on using Gradient Descent Back Propagation Neural Network model with an improvement on the momentum value to identify the important factors that directly affect the hearing ability of industrial workers. Results from the prediction will be used in determining the environmental health hazards which affect the workers health

Analyzing the short term and long-term complication of hysterectomy: a prospective study

Background: Hysterectomy is the most common surgical procedure done worldwide in women. Although many studies were done regarding short term complications, long term complications are not very well followed up. The objective of the study is to analyze short term and also long-term complications for the different mode of hysterectomy.Methods: It was a time-bound hospital-based prospective study which includes all the women who underwent hysterectomy for benign conditions in the hospital except women with prior psychiatric, bowel, bladder and sexual dysfunctions. All the patients were followed up for one year using a set of questionnaires to study short term and long-term complications.Results: No significant difference in short term post-operative complications concerning the mode of hysterectomy except for UTI was more common in vaginal hysterectomy group and haemorrhage in TAH route. Sexual dysfunction was noted even after 1 year of surgery in all modes of hysterectomy. Mild urinary dysfunction found statistically significant even at 1 year follow up in vaginal hysterectomy mode however there was no bothersome urinary dysfunction persistent after one year.Conclusions: Sexual dysfunction is the most common persistent long-term morbidity following hysterectomy found in the present study

Pancreatic tubercular abscess in a patient of disseminated tuberculosis

Pancreatic tuberculosis is a rare clinical entity, despite the high prevalence of tuberculosis worldwide. When present pancreatic TB is seen usually associated with military/ disseminated TB in  immuno-compromised patients with HIV topping the list in recent times. Here we present an unusual case of an immuno-competent individual with disseminated tuberculosis including pancreatic tubercular abscess a 30-year- old female was admitted with 3 months history of productive cough, constitutional symptoms and persistent epigastric discomfort. Patient had pallor and was febrile with no mass palpable per abdomen. Ultrasonography (USG)/ Contrast enhanced computed tomography (CECT) of abdomen showed cystic pancreatic lesion. Acid fast bacilli (AFB) were demonstrated in sputum as well as  material obtained from USG guided  fine needle aspiration (FNA) of pancreatic lesion which after 6 weeks of incubation showed growth of mycobacterium tuberculosis (MTB) confirming diagnosis of disseminated tuberculosis with pancreatic involvement. Patient was put on antitubercular therapy (ATT) and response was excellent. This case highlights that TB can affect nearly every organ of the body. It should be kept among differentials while evaluating pancreatic lesions. With adequate treatment it is curable

The effect of service quality towards customer satisfaction of Islamic bank in Kuantan Pahang / Faresya Zunaida Mohd Zubair

The goal of this study is to identify the effects of service quality towards customer satisfaction at Islamic bank in Jalan Tun Ismail Kuantan, Pahang. The study also aims to examine the relationship between service quality (Reliability, Tangibility, and Responsiveness) and customer satisfaction, to investigate the most influencing factor of service quality (Reliability, Tangibility, and Responsiveness) towards customer satisfaction and to know the best service quality (Reliability, Tangibility, and Responsiveness) provided at Islamic Bank in Kuantan area. A sample of 103 banking customers was drawn from Islamic bank in Jalan Tun Ismail. The questionnaire was developed for this study was based on SERVQUAL model that identified the influence three from five dimensions (reliability, tangibility and responsiveness) in banking service environments on customer satisfaction. The results indicate that the three of SERVQUAL dimensions have a positive influence on customer satisfaction. Responsiveness was more significant in contributing to customer satisfaction in Jalan Tun Ismail area while reliability follows after and tangibility was the least significant

Effective interventions in road traffic accidents among the young and novice drivers of low and middle-income countries : A scoping review

Peer reviewedPublisher PD

Emergence of Multidrug-Resistant (MDR) and Extensively Drug- Resistant (XDR) Typhoid Fever in Aligarh, Uttar Pradesh: A Case Series

Salmonella Typhi is a Gram-negative rod which causes enteric fever in humans. The introduction of antibiotics to treat typhoid has considerably improved its outcome, but rising multidrug-resistant (MDR) and extensively drug-resistant (XDR) cases due to injudicious use of antibiotics is a matter of grave concern. This case series presents four cases of XDR typhoid fever from a tertiary care centre in northern India. The patients presented in Pediatrics OPD between June 2022 to August 2022, and were admitted and managed in the Pediatrics ward, Jawaharlal Nehru Medical College, AMU, Aligarh. There were two males and two females with a mean age of 10.5 ± 1.73 years. All the patients presented with fever of more than 10 days duration (median duration of symptom before admission 13 ± 5.74 days, IQR 10.5-20.5) and had been on oral cefixime for enteric fever. But, these patients did not show clinical resolution of fever and other symptoms such as fatigue, weakness etc. After the addition of Azithromycin, patients showed clinical improvement and were subsequently discharged over a period of 6-7 days. We are witnessing rapid emergence of XDR typhi strains across the world particularly in resource limited countries like ours. Azithromycin can be used as safer alternative in both MDR and XDR salmonella bacteremia. Additionally, blood culture should be sent of all suspected patients before start of antibiotics