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Effect of wire tension on different output responses during wire electric discharge machining on AISI 304 stainless steel

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Defence Technology（防务技术） 2019年第4期15卷 541-544页

作者： Tina Chaudhary Arshad Noor Siddiquee Arindam Kumar Chanda Department of Mechanical and Automation Engineering Indira Gandhi Delhi Technical University for Women Kashmere Gate New Delhi India Department of Mechanical Engineering Jamia Millia Islamia (a Central University) New Delhi India Department of Mechanical and Automation Engineering G.B. Pant Engineering College New Delhi India

WEDM is used in machining conductive materials where it is required to obtained complicated and intricate shapes with high *** applications are in the field of automobile,medical industries,aerospace *** is an economical machining option with short product development *** roughness,kerf width,Material removal rate,Recast layer hardness and surface microhardness in WEDM are most important *** this paper,effect of varied Wire tension on SR,KW,MRR,RCL hardness and surface microhardness on AISI 304 have been *** on time,pulse off time,current and dielectric fluid are taken as fixed *** show that Wire tension influences the SR,MRR and Surface microhardness and has no effect on kerf width in case of Stainless steel304.

关键词： Wire EDM Wire tension Material removal rate Surface roughness Kerf width Micro-hardness

A review on emerging materials with focus on BiI_(3) for room-temperature semiconductor radiation detectors

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Radiation Detection Technology and Methods 2023年第4期7卷 465-483页

作者： Ritu Chaudhari Chhaya Ravi Kant Alka Garg Surender Kumar Sharma Department of Applied Sciences and Humanities Indira Gandhi Delhi Technical University for WomenKashmere GateDelhi110006India Gargi College University of DelhiSiri Fort RoadNew Delhi110049India delhi Skill and Entrepreneurship university New DelhiIndia

Purpose Considerable advances in the fundamental knowledge and applications of radiation science have led to significant progress and development of room-temperature semiconductor radiation detectors(RTSD).The RTSDs technologies are continuously evolving with accelerated research and material engineering in the last *** scientific and technological advancements have led to development of high-performance radiation detectors with high signal-to-noise ratio(SNR),better sensitivity,faster response and higher-resolution with capability of desired room-temperature *** paper is a review on emerging semiconductor radiation detector materials with a deeper insight into the prospective role of Bismuth tri-iodide(BiI_(3))for room-temperature radiation *** An introduction of the state of art of most developed semiconductor materials,i.e.,cadmium telluride(CdTe),mercury iodide(HgI_(2)),lead iodide(PbI_(2)),etc.,and a critical examination of properties,shortcomings and challenges related to their synthesis have been ***-semiconductor composites with desirable properties and their integration into detector devices is also *** sections discuss the role of BiI_(3) as an emerging radiation detector material for room-temperature operation with an in-depth discussion on the role of defects in charge transportation and electrode ***,the current challenges along with the future prospects of these materials for radiation detection to promote continuous innovation and practical applications are also *** The comprehensive review on latest developments in room-temperature radiation detector materials is expected to help establish a technological roadmap for the synthesis,fabrication and commercialization of novel materials for development of efficient radiation detectors.

关键词： Radiation detector Defects Electrical properties Bismuth tri-iodide Semiconductor Toxicity

Multiple Response Optimization of Dimensional Accuracy of Nimonic Alloy Miniature Gear Machined on Wire Edm Using Entropy Topsis Andpareto Anova

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Computer Modeling in Engineering & Sciences 2021年第1期126卷 241-259页

作者： Tina Chaudhary Arshad Noor Siddiquee Arindam Kumar Chanda Shafi Ahmad Irfan Anjum Badruddin Zahid A.Khan Department of Mechanical and Automation Engineering Indira Gandhi Delhi Technical University for WomenKashmere Gate110006India Department of Mechanical Engineering Jamia Millia Islamia(A Central University)New Delhi110025India Department of Mechanical and Automation Engineering G.B.Pant Engineering CollegeNew Delhi110020India Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha-61421AsirSaudi Arabia

The purpose of this research is to obtain the optimum cutting parameters to achieve the dimensional accuracy of Nimonic alloy miniature gear manufactured using Wire *** cutting parameters investigated in this study are current,pulse on time(PON),pulse off time(POFF),wire tension(WT)and dielectric *** glycol,nanopowder of alumina and oxygen are mixed to demineralized water to prepare novel dielectric *** in inner diameter,deviation in outer diameter,deviation in land and deviation in tooth width are considered to check the dimensional *** L_(16) is employed for experimental design and multiple response optimization is performed using Entropy TOPSIS and Pareto *** indicate that pulse on time is the most notable parameter for good dimensional accuracy followed by dielectric fluid,current,pulse off time and wire *** glycol mixed demineralized water is preferred for low dimensional *** optimum WEDM parameters are pulse on time at 20μs,Ethylene glycol mixed demineralized water dielectric fluid,current at 3 A,pulse off time at 4μs,and wire tension at 18 N.

关键词： Miniature gear multiple optimization dimensional accuracy entropy TOPSIS Pareto ANOVA

Enhanced osseointegration of drug eluting nanotubular dental implants: An in vitro and in vivo study

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Bioactive Materials 2023年第10期28卷 432-447页

作者： Pankaj Chauhan Alok Srivastava Pooja Bhati Manish Chaturvedi Vinay Patil Sriram Kunnoth Nisha Kumari Vedpal Arya Madhur Pandya Mohit Agarwal Smiti Bhardwaj Farrukh Faraz Sanjay Chauhan Mahesh Verma Veena Koul Naresh Bhatnagar Homi Bhabha Cancer Hospital and Research Centre VizagAndhra PradeshIndia Centre for Biomedical Engineering Indian Institute of Technology DelhiIndia Department of Mechanical Engineering Indian Institute of Technology DelhiIndia Mechanical&Automation Engineering Indira Gandhi Delhi Technical University for WomenNew DelhiIndia Rajasthan technical university Kota RajasthanIndia Applied Mechanics Indian Institute of Technology DelhiIndia National university of Singapore Singapore Department of Periodontics Maulana Azad Institute of Dental SciencesNew DelhiIndia Rajasthan Dental College and Hospital JaipurRajasthanIndia Department of Prosthodontics Maulana Azad Institute of Dental SciencesNew DelhiIndia

Faster and predictable osseointegration is crucial for the success of dental implants, especially in patients with compromised local or systemic conditions. Despite various surface modifications on the commercially available Titanium (Ti) dental implants, the bioactivity of Ti is still low. Thus, to achieve both biological and therapeutic activity on titanium surfaces, surface modification techniques such as titanium nanotubes have been studied as nanotube surfaces can hold therapeutic drugs and molecules. The main aim of the present research work is to study the early osseointegration around the novel Simvastatin drug eluting nanotubular dental implant. In the present research, the titanium nanotubes were fabricated on the screw-shaped dental implant surface and the Simvastatin drug was loaded into the nanotubes using the ultrasonication dip method. In vitro and In vivo studies were carried out on the modified dental implants. In vitro cell culture study reported enhanced osteogenic activity on the drug-loaded nanotube surface implants. The in vivo animal studies were evaluated by micro-CT, histopathology, and reverse torque removal analysis methods. The test results showed faster osseointegration with the strong interface on the Simvastatin drug-loaded implant surface at 4 weeks of healing as compared to the control implants.

关键词： Titanium Biocompatibility Simvastatin Nanotube Micro CT Histopathology Nanoscale

Fault Coverage-Based Test Case Prioritization and Selection Using African Buffalo Optimization

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Computers, Materials & Continua 2023年第3期74卷 6755-6774页

作者： Shweta Singhal Nishtha Jatana Ahmad F Subahi Charu Gupta Osamah Ibrahim Khalaf Youseef Alotaibi indira gandhi delhi technical university for women Delhi110006India Maharaja Surajmal Institute of Technology New Delhi110058India Department of Computer Science University College of Al JamoumUmm Al-Qura UniversityMakkah21421Saudi Arabia Bhagwan Parshuram Institute of Technology RohiniNew Delhi110085India Al-Nahrain university Al-Nahrain Nanorenewable Energy Research CenterBaghdad64074Iraq Department of Computer Science College of Computer and Information SystemsUmm Al-Qura UniversityMakkah21955Saudi Arabia

Software needs modifications and requires revisions *** to these revisions,retesting software becomes essential to ensure that the enhancements made,have not affected its bug-free *** time and cost incurred in this process,need to be reduced by the method of test case selection and *** is observed that many nature-inspired techniques are applied in this *** Buffalo Optimization is one such approach,applied to regression test selection and *** this paper,the proposed work explains and proves the applicability of the African Buffalo Optimization approach to test case selection and *** proposed algorithm converges in polynomial time(O(n^(2))).In this paper,the empirical evaluation of applying African Buffalo Optimization for test case prioritization is done on sample data set with multiple *** astounding 62.5%drop in size and a 48.57%drop in the runtime of the original test suite were *** obtained results are compared with Ant Colony *** comparative analysis indicates that African Buffalo Optimization and Ant Colony Optimization exhibit similar fault detection capabilities(80%),and a reduction in the overall execution time and size of the resultant test *** results and analysis,hence,advocate and encourages the use of African Buffalo Optimization in the area of test case selection and prioritization.

关键词： Test case prioritization regression testing test case selection African buffalo optimization nature-inspired meta-heuristic

Significant Factors for Reliability Estimation of Component Based Software Systems

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Journal of Software Engineering and Applications 2014年第11期7卷 934-942页

作者： Kirti Tyagi Arun Sharma Ajay Kumar Garg Engineering College Ghaziabad India Department of Information Technology Indira Gandhi Delhi Technical University for Women (IGDTUW)Kashmere Gate Delhi

Software reliability is defined as the probability of the failure-free operation of a software system for a specified period of time in a specified environment. Traditional approaches for software reliability analysis are black box approaches. These approaches use the software as a whole. At present, main emphasis of software is on reuse, hence component based software applications came into existence. Black box models are not appropriate for these applications. This paper introduces some significant factors for reliability estimation of Component Based Software Applications. Reliability of Component Based Software Application depends upon these factors. This paper?also gives the definition of factors and explains its relation with reliability of software application.

关键词： Failure Rate Reliability Component Based Systems Flexibility Operational Profile

Dynamic Fracture Toughness of Armour Grade Quenched and Tempered Steel Joints Fabricated Using Low Hydrogen Ferritic Fillers

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Journal of Iron and Steel Research International 2010年第5期17卷 51-56页

作者： G Magudeeswaran V Balasubramanian S Sathyanarayanan G Madhusudhan Reddy A Moitra S Venugopal G Sasikala Department of Mechanical Engineering Pannaikkadu Veerammal Paramasivam College of Engineering andTechnology for Women Department of Manufacturing Engineering Annamalai University Materials Mechanics Section Indira Gandhi Center for Atomic Research Metal JoiningSection Defence Metallurgical Research Laboratory

The armour grade quenched and tempered steel joints fabricated using low hydrogen ferritic steel （LHF） filler exhibited superior joint efficiency owing to preferential ferrite microstructure in the welds and also they offered required resistance to HIC. However, the combat vehicles used in military operations will be required to operate under a wide range of road conditions ranging from first class to cross country. Structural components in combat vehicles are subjected to dynamic loading with high strain rates during operation. Stress loadings within the vehicle hull of these vehicles are expected to fluctuate considerably and structural cracking especially in welds during the service life of these vehicles can lead to catastrophic failures. Under these conditions, fracture behaviour of high strain rate sensitive structural steels can be better understood by dynamic fracture toughness （K1d）. Hence, an attempt was made to study dynamic fracture toughness of the armour grade quenched and tempered steel and their welds fabricated using LHF consumables. The experimental results indicate that the K1d values of the joints fabricated by shielded metal arc welding （SMAW） are higher than those of the joints fabricated using flux cored arc welding （FCAW） process.

关键词： quenched steel tempered steel low hydrogen ferritic steel dynamic fracture toughness

A Comprehensive Image Processing Framework for Early Diagnosis of Diabetic Retinopathy

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Computers, Materials & Continua 2024年第11期81卷 2665-2683页

作者： Kusum Yadav Yasser Alharbi Eissa Jaber Alreshidi Abdulrahman Alreshidi Anuj Kumar Jain Anurag Jain Kamal Kumar Sachin Sharma Brij BGupta College of Computer Science and Engineering University of Ha’ilHa’il81481Saudi Arabia Department of CSE Chandigarh UniversityMohaliPunjab140413India Department of Electronics and Communication Engineering Amity UniversityNoida201301India Department of Information Technology Indira Gandhi Delhi Technical University for WomenNew Delhi110006India Chief Manager State Bank of IndiaPanchkulaHaryana134109India Department of Computer Science and Information Engineering Asia UniversityTaichung City413Taiwan Symbiosis Centre for Information Technology(SCIT) Symbiosis International UniversityPune411057India Center for Interdisciplinary Research University of Petroleum and Energy Studies(UPES)Dehradun248007India

In today’s world,image processing techniques play a crucial role in the prognosis and diagnosis of various diseases due to the development of several precise and accurate methods for medical *** analysis of medical images is essential for doctors,as manual investigation often leads to inter-observer *** research aims to enhance healthcare by enabling the early detection of diabetic retinopathy through an efficient image processing *** proposed hybridized method combines Modified Inertia Weight Particle Swarm Optimization(MIWPSO)and Fuzzy C-Means clustering(FCM)*** FCM does not incorporate spatial neighborhood features,making it highly sensitive to noise,which significantly affects segmentation *** method incorporates a modified FCM that includes spatial functions in the fuzzy membership matrix to eliminate *** results demonstrate that the proposed FCM-MIWPSO method achieves highly precise and accurate medical image ***,segmented images are classified as benign or malignant using the Decision Tree-Based Temporal Association Rule(DT-TAR)*** analysis with existing state-of-the-art models indicates that the proposed FCM-MIWPSO segmentation technique achieves a remarkable accuracy of 98.42%on the dataset,highlighting its significant impact on improving diagnostic capabilities in medical imaging.

关键词： Image processing biological data PSO Fuzzy C-Means(FCM)

Intelligent Aquila Optimization Algorithm-Based Node Localization Scheme for Wireless Sensor Networks

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Computers, Materials & Continua 2023年第1期74卷 141-152页

作者： Nidhi Agarwal M.Gokilavani S.Nagarajan S.Saranya Hadeel Alsolai Sami Dhahbi Amira Sayed Abdelaziz Department of Information Technology KIET Group of InstitutionsDelhi201206India Department of Computer Science and Engineering Indira Gandhi Delhi Technical University for WomenNew DelhiDelhi110006India Department of Computer Science and Engineering KL UniversityVaddeswaramAndhra Pradesh522502India Department of Electronics&Communication Engineering Saveetha Engineering CollegeChennai602105India Department of Computer Science and Engineering K.Ramakrishnan College of EngineeringTiruchirapalli621112India Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Science College of Science&Art at MahayilKing Khalid UniversityMuhayel Aseer62529Saudi Arabia Department of Digital Media Faculty of Computers and Information TechnologyFuture University in EgyptNew Cairo11835Egypt

In recent times,wireless sensor network(WSN)finds their suitability in several application areas,ranging from military to commercial *** nodes in WSN are placed arbitrarily in the target field,node localization(NL)becomes essential where the positioning of the nodes can be determined by the aid of anchor *** goal of any NL scheme is to improve the localization accuracy and reduce the localization error *** this motivation,this study focuses on the design of Intelligent Aquila Optimization Algorithm Based Node Localization Scheme(IAOAB-NLS)for *** presented IAOAB-NLS model makes use of anchor nodes to determine proper positioning of the *** addition,the IAOAB-NLS model is stimulated by the behaviour of *** IAOAB-NLS model has the ability to accomplish proper coordinate points of the nodes in the *** guaranteeing the proficient NL process of the IAOAB-NLS model,widespread experimentation takes place to assure the betterment of the IAOAB-NLS *** resultant values reported the effectual outcome of the IAOAB-NLS model irrespective of changing parameters in the network.

关键词： Aquila optimizer node localization WSN intelligent models unknown nodes anchor nodes