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Brain Tumor Segmentation through Level Based Learning Model

Computer Systems Science & Engineering 2023年第1期44卷 709-720页

作者： k.dinesh babu C.Senthil Singh Department of Electronics and Communication Engineering Adhi College of Engineering and Technology631605India Department of Electronics and Communication Engineering Infant Jesus College of EngineeringVallanaduThoothukudi628851India

Brain tumors are potentially fatal presence of cancer cells over a human brain,and they need to be segmented for accurate and reliable planning of *** process must be carried out in different regions based on which the stages of cancer can be accurately *** patients exhibit a different level of challenge in terms of cancer or tumors detection as the Magnetic Resonance Imaging(MRI)images possess varying sizes,shapes,positions,and *** scanner used for sensing the location of tumors cells will be sub-jected to additional protocols and measures for accuracy,in turn,increasing the time and affecting the performance of the entire *** this view,Convolutional Neural Networks deliver suitable models for efficient segmentation and thus delivered promising *** previous strategies and models failed to adhere to diversity of sizes and shapes,proving to be a well-established solution for detecting tumors of bigger *** tend to be smaller in size and shape during their premature stages and they can easily evade the algorithms of Convolutional Neural Network(CNN).This proposal intends to furnish a detailed model for sensing early stages of cancer and hence perform segmentation irrespective of the current size and shape of *** size of networks and layers will lead to a significant weightage when multiple kernel sizes are involved,especially in multi-resolution *** the other hand,the proposed model is designed with a novel approach including a dilated convolution and level-based learning *** the convolution process is dilated,the process of feature extraction deals with multiscale objective and level-based learning eliminates the shortcoming of previous models,thereby enhancing the quality of smaller tumors cells and *** level-based learning approach also encapsulates the feature recon-struction processes which highlights the sensing of small-scale tumors ***,segmenting t

关键词： Glioma detection segmentation smaller tumour growth machine learning feature analysis

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Performance and Emission Characteristics of a CRDI Diesel Engine Fuelled by SiO_(2) Nanoparticle-Waste Fat Biodiesel Blends

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China Petroleum Processing & Petrochemical Technology 2024年第1期26卷 56-66页

作者： babu Aurtherson P dinesh babu Munuswamy Ravikumar Jayabal Yuvarajan Devarajan Department of Mechanical Engineering Mahat Amma Institute of Engineering and TechnologyPudukkottaiTamil NaduIndia Department of Mechanical Engineering Rajalakshmi Institute of TechnologyChennaiTamil NaduIndia Department of Thermal Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical SciencesChennaiTamil NaduIndia

This study investigates the use of waste fat biodiesel(WFB)from the leather industry as a substitute for diesel ***,it examines the diesel engine performance of WFB,a blend of WFB and diesel(B50),and different blends of WFB and silicon dioxide(SiO_(2))nanoparticles(B50SiO_(2)40,B50SiO_(2)80,and B50SiO_(2)120μg/g).The results indicate that the B50SiO_(2)120 blend increases brake thermal efficiency by 10.03%compared to pure biodiesel but falls 1.93%short of neat ***,the B50SiO_(2)120 mixture reduces smoke,hydrocarbon,and carbon monoxide emissions by 31.87%,34.14%,and 43.97%respectively,compared to ***,the B50SiO_(2)120 blend shows a 4.91%increase in nitrogen oxide emissions compared to diesel.

关键词： waste fat transesterification biodiesel silicon dioxide emission

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Design and development of self-cleaning PV sliding system

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Clean Energy 2022年第3期6卷 392-403页

作者： Vinay Gupta Madhu Sharma Rupendra Pachauri k N dinesh babu Department of Electrical Engineering Manipal University Jaipur-303007India School of Engineering University of Petroleum and Energy StudiesDehradun-248007India Megger Group Ltd MylaporeChennai-600004India

This study describes the designing steps of the proposed self-cleaning system for the photovoltaic(PV)system and experimentally investigates the effectiveness of the proposed self-cleaning PV sliding system for solar power plants under all Indian climate *** investigate the performance of the proposed self-cleaning PV sliding system,we used three PV panels of 20 W with a sliding structure and another set of three PV panels of 20 W with a traditional(fixed)technique,and recorded the output power for the period of December 2019 to April *** experimental results show that the proposed self-cleaning PV sliding system improved efficiency by 18.3%,13.3%and 6.4%,respectively,in the summer,winter and post-monsoon seasons when compared to the fixed PV *** results also revealed that energy consumption was very low when compared to the amount of energy *** proposed system not only cleans the PV system,but also protects it from *** results of this study show that there is a significant improvement in PV efficiency and thus an increase in electricity production under all climate conditions.

关键词： solar energy photovoltaics cleaning soiling hailstorm protection sliding PV system

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Emission and performance study emulsi ed orange peel oil biodiesel in an aspirated research engine

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Petroleum Science 2019年第1期16卷 180-186页

作者： R.Siva dinesh babu Munuswamy Yuvarajan Devarajan Department of Mechanical Engineering Sathyabama Institute of Science and Technology Department of Mechanical Engineering Panimalar Engineering College Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology

This study paves the way on reducing smoke emission and NO_x emissions of research diesel engine by detailing the e ect of water addition in biodiesel. Fuel samples were prepared with di erent concentrations of water in orange peel oil biodiesel(94% waste orange peel oil biodiesel + 4% water + 2% Span 80(WOPOBDE1) and 90% waste orange peel oil biodiesel + 8% water + 2% Span 80(WOPOBDE2). Span 80 was employed as a nonionic surfactant, which emulsifies water in biodiesel. Experimental results revealed that the nitrogen oxides and smoke emission of orange peel oil biodiesel emulsion were reduced by 11%–19% and 3%–21%, respectively, compared to that of neat orange peel oil biodiesel(WOPOBD). In addition, the introduction of orange peel oil–water emulsions in the diesel engine considerably reduced the emissions of unburned hydrocarbons and carbon monoxide. The overall hydrocarbon emission of WOPOBDE2 was 12.2% lower than that of WOPOBD and 16.3% lower than that of diesel. The overall CO emission of WOPOBDE2 was 17% lower than that of base fuel(WOPOBD) and 21.8% lower than that of diesel. Experimental results revealed that modified fuel had higher brake thermal e ciency and lower brake specific fuel consumption than that of base fuel at all engine brake power levels.

关键词： Orange peel biodiesel Diesel engine Water-biofuel emulsions Performance Emissions

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Effect of Heat Sink and Cooling Mediums on Ferrite Austenite Ratio and Distortion in Laser Welding of Duplex Stainless Steel 2205

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Chinese Journal of Mechanical Engineering 2019年第3期32卷 209-217页

作者： P.dinesh babu P.Gouthaman P.Marimuthu School of Mechanical Engineering SASTRA Deemed UniversityThanjavur 613401TamilnaduIndia Management Development Centre Ashok LeylandMookandapalliHosurTamilnaduIndia

In order to control the ferrite and austenite percentage in duplex stainless steel welding, many researchers try to change the laser welding parameters and cooling medium, but ignore to study the influence of heat sink effect on weld strength. In this work, the effect of aluminium heat sink and varying cooling medium on the laser welding of duplex stainless steel (DSS) 2205 is studied. The 2 mm thick DSS sheets welded with pulsed Nd: YAG laser welding machine by varying the cooling medium (air and oil) and an aluminium plate used as a heat sink. The welded specimens tested for tensile strength, micro-hardness, distortion, microstructure and radiography analysis. The faster cooling rate in the oil quenching process enhances the ferrite percentage compared with air-cooled samples. But the faster cooling rate in oil quenching leads to more distortion and using aluminium as a heat sink influenced positively the distortion to a small extent. The lower cooling rate in air quenching leads to a higher tensile strength of the welded specimen. The objective of this work is to analyse experimentally the effect of cooling medium and heat sink in the mechanical and metallurgical properties of laser welded duplex stainless steel.

关键词： Laser welding Duplex stainless steels Heatsink Cooling medium Distortion Tensile strength Radiography test

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Age of the earliest transgressive event in the krishna-Godavari Basin, India: evidence from dinoflagellate cysts and planktonic foraminifera biostratigraphy

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Journal of Palaeogeography 2020年第1期9卷 60-70页

作者： Ashish kumar Mishra Nallamuthu Malarkodi Arun Deo Singh dinesh babu Vandana Prasad Birbal Sahni Institute of Palaeosciences LucknowIndia Department of Geology Jnanabharathi CampusBangalore UniversityBengaluru 560056India Department of Geology Banaras Hindu UniversityVaranasi 221005India Oil India Limited KakinadaIndia.

A combined biostratigraphic study of dinoflagellate cysts and foraminifera was carried out on Early Cretaceous subsurface well cutting sediments from well A(DNG)(2800–2746 m depth)from the krishna-Godavari Basin,*** last appearance datum of marker species of dinoflagellate cysts and planktonic foraminifera was considered for the construction of the biostratigraphic *** study shows dominance of Early Cretaceous marker dinoflagellate cysts Cassiculosphaeridia magna,Cribroperidinium perforans,Hystrichodinium voigtii,kleithriasphaeridium eoinodes,and planktonic foraminifera Hedbergella aptiana,Hedbergella mitra,Hedbergella praelippa,Hedbergella tardita,Microhedbergella miniglobularis and Hedbergella mitra *** addition to this,the dinoflagellate cyst data were compared with the dinoflagellate biozones of Austral and Tethyan *** on earlier micropalaeontological records from the krishna-Godavari Basin and the present study,a latest Barremian-early Aptian age has been determined for the earliest marine transgression in the krishna-Godavari *** early marine incursion during late Barremian-earliest Aptian in the krishna-Godavari Basin compared to Albian age in Cauvery Basin suggests the opening of east coast from north to south.

关键词： Biostratigraphy krishna-Godavari Basin Palaeoenvironment

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Effect of laser textured surface with different patterns on tribological characteristics of bearing material AISI 52100

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Journal of Central South University 2020年第8期27卷 2210-2219页

作者： PAUL JOSHUA S dinesh babu P School of Mechanical Engineering SASTRA Deemed UniversityThanjavur 613401TamilnaduIndia

Chrome steels are used in bearings since they possess high strength and wear ***,when those parts are in service,failure happens due to sliding friction before the *** improve the durability of the American Iron and Steel Institute(AISI)52100 chromium steel,in this work,the effect of laser surface texturing(LST)was *** the different patterns of circle and ellipse comparing with the untextured samples,the wear behavior was investigated using the pin-on-disc *** lubricant used for wear analysis is semisolid lithium grease National Lubricating Grease Institute lubricant(SkF NLGI-3).Sliding wear analysis was conducted at different loads of 10 N,30 N and 50 N for the sliding speed of 750 r/min and 1400 r/*** wear morphology was analyzed using a scanning electron microscope(SEM).The roughness of the samples was found using a white light *** effect of different patterns like circle and ellipse,alter the friction and wear properties of chromium alloy was observed compared with the untextured *** shows considerable reduction in friction and wear for ellipsoidal pattern compared with the circular pattern because of wear debris and lubricant getting trapped.

关键词： laser surface micro texturing AISI52100 3D surface roughness wear scanning electron microscopy

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Apoptogenic activity of ethyl acetate extract of leaves of Memecylon edule on human gastric carcinoma cells via mitochondrial dependent pathway

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Asian Pacific Journal of Tropical Medicine 2013年第5期6卷 337-345页

作者： VGM.Naidu Bandari Uma Mahesh Ashwini kumar Giddam kuppan Rajendran dinesh babu Jian Ding k Suresh babu B Ramesh Rajeswara Rao Pragada Gopalakrishnakone P Venom & Toxin Research Programme Department of AnatomyYong Loo Lin School of Medicine4 Medical DriveNational University of SingaporeSingapore-117597 Currently affiliated to Department of Pharmacology & Toxicology National Institute of Pharmaceutical Education & Research(NIPER)BalanagarHyderabadA.PIndia-500037 Department of pharmacology A.U.College of pharmaceutical SciencesAndhra universityVishakhapatnamAndhra PradeshIndia-530003 Natural Products Laboratory Indian Institute of Chemical TechnologyUppal RoadHyderabad 500 607India

Objective:To evaluate the anti-proliferative and apoptogenic activity of ethyl acetate extract from the leaves of Memecylon edule(EtAc-LME) in MkN-74,NUGC gastric cancer cells and non cancerous gastric mucous cells(GES-1),and to explore the mechanism of EtAc-LME induced ***:The mechanism of EtAc-LME induced apoptosis was explored by analysing the activation of pro-caspases,PARP cleavage,expression of cytochrome-c (Cyt-c) was determined by western blotting,mRNA expression of Bcl-2,Bax by RT-PCR,loss of mitochondrial potential using DiOC6 dye,annexin binding assay and its influence on cell cycle arrest by flow ***:The results indicated that EtAc-LME inhibited the gastric cancer cell growth in dose-dependent manner and cytotoxicity was more towards the gastric cancer cells(NUCC and MkN-74) compared to normal gastric cells(GES-1),suggesting more specific cytotoxicity to the malignant *** expression of Cyt-c and subsequent activation of caspases-3 and down regulation of Bcl-2 and loss in mitochondrial potential in EtAc-LME treated MkN-74 and NUGC cells suggested that EtAc-LME induced apoptosis by mitochondrial dependent ***:The present findings suggest that ethyl acetate extract of Memecylon edule induces apoptosis selectively in gastric cancer cells emphasizing the importance of this traditional medicine for its potential in the treatment of gastric cancer.

关键词： Memecylon edule Anti-cancer Gastric cancer Apoptosis

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ALk expression,prognostic significance,and its association with MYCN expression in MYCN non-amplified neuroblastoma

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World Journal of Pediatrics 2022年第4期18卷 285-293页

作者： dinesh babu Somasundaram Sheeja Aravindan Nandita Gupta Zhongxin Yu Ashley Baker Natarajan Aravindan Department of Radiation Oncology BMSB 311CRadiation Biology LaboratoryUniversity of Oklahoma Health Sciences Center940 Stanton L.Young BoulevardOklahoma CityOK 73104USA Stephenson Cancer Center Oklahoma CityOKUSA Plainsboro NJUSA Department of Pathology BMSB 311CRadiation Biology LaboratoryUniversity of Oklahoma Health Sciences Center940 Stanton L.Young BoulevardOklahoma CityOK 73104USA Department of Pediatrics University of Oklahoma Health Sciences CenterOklahoma CityOKUSA

Neuroblastoma(NB),the most common cancer at infancy,is derived from a selective sympathoadrenal lineage of the neural crest cells[1-3].The majority of NB is found in children younger than 5 years(median age:2 years)and is rare in children older than 10 *** NB accounts for only 5-6%of the childhood cancers,it heavily contributes(about 15%)to pediatric cancer deaths[4,5].

关键词： neuroblastoma MYCN cancer

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Mesenchymal stem cell-based TRAIL delivery inhibits the metastatic state of clinical therapy-resistant progressive neuroblastoma

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World Journal of Pediatrics 2024年第3期20卷 287-293页

作者： dinesh babu Somasundaram Andrew Maher Sheeja Aravindan Zhongxin Yu Brian MBesch Natarajan Aravindan Department of Radiation Oncology University of Oklahoma Health Sciences CenterOklahoma CityOKUSA Stephenson Cancer Center Oklahoma CityOKUSA Department of Pathology University of Oklahoma Health Sciences CenterOklahoma CityOKUSA Radiation Biology Laboratory University of Oklahoma Health Sciences CenterBSEB 302F941 Stanton L.Young BoulevardOklahoma CityOK 73104USA

Progressive neuroblastomas(pNBs)that defy current intensive multimodal clinical therapy(IMCT)are a significant contributor to overall childhood cancer deaths[l].Neuroblastomas(NBs)that survive first-line IMCT actively evolve to acquire genetic and molecular rearrangements and display unparalleled plasticity and evolution,which causes frequent relapses in a rapidly accelerating timeline[2-4].

关键词： neuroblastoma clinical evolve

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