检索结果-南通市图书馆

Mechanical Properties and Microstructural Evolution of Bulk UFG Al 2014 Alloy Processed Through Cryorolling and Warm Rolling

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2019年第7期32卷 845-856页

作者： Manoj Kumar Pathak amit joshi K. K. S. Mer R. Jayaganthan Department of Mechanical Engineering G. B. Pant Institute of Engineering and Technology Pauri-Garhwal 246194 India Department of Engineering Design. Indian Institute of Technology Madras Chennai 600036 India

Tensile properties, microstructural evolution and fracture toughness of Al 2014 alloy subjected to cryorolling followed by warm rolling (CR + WR) have been investigated in the present study. The solution-treated (ST) Al 2014 alloy is cryorolled followed by warm rolling process at different temperatures (110, 170 and 210 ℃). The mechanical properties and microstructural features of deformed and undeformed Al 2014 alloys were characterised by optical microscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The CR + WR samples at 170 ℃ showed an improved hardness (179 HV), tensile (UTS 499 MPa, YS 457 MPa) and fracture toughness (KQ = 37.49 MPa y/m, Kee = 37.39 MPa √m and J integral = 33.25 kJ/mm^2) with respect to ST alloy as measured from the tensile and fracture toughness test. The improved mechanical properties of CR + WR alloy are attributed to grain boundary strengthening, combined recovery and recrystallisation, precipitation hardening and dynamic ageing effect during the deformation. The precipitation of metastable spherical phase Al2Cu was responsible for the improved tensile and fracture properties of finegrained Al 2014 alloy observed in the present work.

关键词： Al alloys Ultrafine grains Fracture toughness

Cytomegalovirus infection in the bone marrow transplant patient

在线全文

学校读者我要写书评

暂无评论

World Journal of Transplantation 2015年第4期5卷 287-291页

作者： Vivek Bhat amit joshi Rahul Sarode Preeti Chavan Advanced Centre for Treatment Research and Education in CancerTata Memorial Centre Tata Memorial Hospital

Cytomegalovirus(CMV) infection is an important contributor to the morbidity and mortality associated with bone marrow transplantation(BMT). Infection may lead to CMV disease involving multiple organs such as pneumonia, gastroenteritis, retinitis, central nervus system involvement and others. CMV seropositivity is an important risk factor and approximately half of BMT recipients will develop clinically significant infection most commonly in the first 100 d post-transplant. The commonly used tests to diagnose CMV infection in these patients include the pp65 antigenemia test and the CMV DNA polymerase chain reaction(PCR) assay. Because of its greater sensitivity and lesser turnaround time, the CMV PCR is nowadays the preferred test and serves as a main guide for pre-emptive therapy. Methods of CMV prevention include use of blood products from seronegative donors or leukodepleted products. Prophylaxis or pre-emptive therapy strategies for CMV prevention may be used post-transplant with the latter becoming more common. The commonly used antivirals for pre-emptive therapy and CMV disease management include intravenous gancyclovir and foscarnet. The role of intravenous immunoglobulin, although used commonly in CMV pneumonia is not clear.

关键词： Cytomegalovirus Infection Bone marrow transplant

Giant Coronary Artery Pseudoaneurysm after Drug-Eluting Stent Implantation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Clinical Medicine 2015年第8期6卷 554-560页

作者： Ashok Bhupali amit joshi Sachin Patil Prithiviraj Jadhav Sayi Prasad Tanmay Vora Nirlep Gajiwala Ashok Thakkar Apple Hospitals & Research Institute Ltd. Kolhapur India Aster Aadhar Hospital Kolhapur India Sahajanand Medical Technologies Pvt. Ltd. Surat India

Formation of coronary artery pseudoaneurysm after percutaneous coronary intervention is rarely reported. A close review of available literature indicates a trend of growing incidence in recent times. Here, we present a case of coronary pseudoaneurysm developing in the left circumflex artery within 50 days of sirolimus-eluting stent implantation in a 47-year-old man who was treated for triple-vessel coronary artery disease. Initially, the patient refused any further treatment. However, considering the rapid growth of pseudoaneurysm and increased severity of symptoms at subsequent follow-up, we decided to treat giant pseudoaneurysm with embolization coils. The procedure was successful and the patient remained asymptomatic thereafter.

关键词： Coronary Aneurysm Drug-Eluting Stent Embolization Coil Interventional Cardiology Pseudoaneurysm Sirolimus

Three-Stage Transfer Learning with AlexNet50 for MRI Image Multi-Class Classification with Optimal Learning Rate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 155-183页

作者： Suganya Athisayamani A.Robert Singh Gyanendra Prasad joshi Woong Cho School of Computing Sastra Deemed to be UniversityThanjavur613401India Department of Computational Intelligence SRM Institute of Science and TechnologyKattankulathur603203India Department of AI and Software Engineering Kangwon National UniversitySamcheok25913Republic of Korea Department of Electronics Information and Communication EngineeringKangwon National UniversitySamcheok25913Republic of Korea

In radiology,magnetic resonance imaging(MRI)is an essential diagnostic tool that provides detailed images of a patient’s anatomical and physiological *** is particularly effective for detecting soft tissue ***,radiologists manually interpret these images,which can be labor-intensive and time-consuming due to the vast amount of *** address this challenge,machine learning,and deep learning approaches can be utilized to improve the accuracy and efficiency of anomaly detection in MRI *** manuscript presents the use of the Deep AlexNet50 model for MRI classification with discriminative learning *** are three stages for learning;in the first stage,the whole dataset is used to learn the *** the second stage,some layers of AlexNet50 are frozen with an augmented dataset,and in the third stage,AlexNet50 with an augmented dataset with the augmented *** method used three publicly available MRI classification datasets:Harvard whole brain atlas(HWBA-dataset),the School of Biomedical Engineering of Southern Medical University(SMU-dataset),and The National Institute of Neuroscience and Hospitals brain MRI dataset(NINS-dataset)for *** hyperparameter optimizers like Adam,stochastic gradient descent(SGD),Root mean square propagation(RMS prop),Adamax,and AdamW have been used to compare the performance of the learning ***-dataset registers maximum classification *** evaluated the performance of the proposed classification model using several quantitative metrics,achieving an average accuracy of 98%.

关键词： MRI tumors classification AlexNet50 transfer learning hyperparameter tuning optimizer

Multi-Scale Dilated Convolution Network for SPECT-MPI Cardiovascular Disease Classification with Adaptive Denoising and Attenuation Correction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 299-327页

作者： A.Robert Singh Suganya Athisayamani Gyanendra Prasad joshi Bhanu Shrestha Department of Computational Intelligence SRM Institute of Science and TechnologyKattankulathur603203Tamil NaduIndia School of Computing Sastra Deemed to be UniversityThanjavur613401Tamil NaduIndia Department of Artificial Intelligence&Software Kangwon National UniversitySamcheok25913Republic of Korea Department of Information Convergence System Graduate School of Smart ConvergenceKwangwoon UniversitySeoul01897Republic of Korea

Myocardial perfusion imaging(MPI),which uses single-photon emission computed tomography(SPECT),is a well-known estimating tool for medical diagnosis,employing the classification of images to show situations in coronary artery disease(CAD).The automatic classification of SPECT images for different techniques has achieved near-optimal accuracy when using convolutional neural networks(CNNs).This paper uses a SPECT classification framework with three steps:1)Image denoising,2)Attenuation correction,and 3)Image *** denoising is done by a U-Net architecture that ensures effective image *** correction is implemented by a convolution neural network model that can remove the attenuation that affects the feature extraction process of ***,a novel multi-scale diluted convolution(MSDC)network is *** merges the features extracted in different scales and makes the model learn the features more *** scales of filters with size 3×3 are used to extract *** three steps are compared with state-of-the-art *** proposed denoising architecture ensures a high-quality image with the highest peak signal-to-noise ratio(PSNR)value of *** proposed classification method is compared with the five different CNN models,and the proposed method ensures better classification with an accuracy of 96%,precision of 87%,sensitivity of 87%,specificity of 89%,and F1-score of 87%.To demonstrate the importance of preprocessing,the classification model was analyzed without denoising and attenuation correction.

关键词： SPECT-MPI CAD MSDC denoising attenuation correction classification

Clinical outcomes for nasopharyngeal cancer with intracranial extension after taxanebased induction chemotherapy and concurrent chemo-radiotherapy in the modern era

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Otorhinolaryngology-Head and Neck Surgery 2020年第1期6卷 25-33页

作者： Sarbani Ghosh-Laskar Avinash Pilar Carlton Johnny Kumar Prabhash amit joshi Jai Prakash Agarwal Tejpal Gupta Ashwini Budrukkar Vedang Murthy Monali Swain Vanita Noronha Vijay Maruthi Patil Prathamesh Pai Deepa Nair Devendra Arvind Chaukar Shivakumar Thiagarajan Gouri Pantvaidya Anuja Deshmukh Pankaj Chaturvedi Sudhir Nair Anil D’Cruz Department of Radiation Oncology Tato Memorial HospitalHomi Bhobho National InstituteMumbaiIndia Department of Medical Oncology Tata Memorial HospitalHomi Bhobha Notional InstituteMumbaiIndia Department of Surgical Oncolosy Tota Memorial HospitalHomi Bhabha Notional InstituteMumbait India

Objective:To evaluate the survival outcomes for a cohort of nasopharyngeal cancer with intracranial extension(ICE)treated with induction chemotherapy(ICT)followed by chemo-intensity-modulated radiotherapy(CTRT)at a tertiary cancer ***:We retrospectively analyzed 45 patients with histologically proven,non-metastatic NPC with ICE treated at our institute between October 2008 and October *** were classified as minor ICE or major ICE,based on the extent of *** the patients received 2-3 cycles of a taxane-based ICT regimen followed by *** was delivered with"riskadapted"intensity-modulated radiotherapy(IMRT)technique in all ***:After a median follow up of 45 months(range:8-113 months),the estimated 5-year DFS,LRFS,DMFS,and OS of the entire cohort was 58%,82%,67%and 74%*** multivariate analysis,histological subtype was an independent predictor of LRFS,and age was an independent predictor of *** extent of ICE showed only a trend towards worse DFS(P=0.06).None of the factors significantly predicted for DMFS or ***,N-stage,and response to ICT did not significantly affect any of the *** 2 or worse subcutaneous fibrosis was seen in 22%of patients and grade 2 or worse xerostomia was seen in 24%of patients at last follow ***-three percent of the patients developed clinical hypothyroidism at last follow *** of the patients experienced any neurological or vascular ***:Taxane-based induction chemotherapy followed by chemo-intensity modulated radiotherapy resulted in excellent locoregional control and survival with acceptable toxicities in patients of nasopharyngeal cancer with intracranial *** metastasis continues to be the predominant problem in these patients.

关键词： Nasopharyngeal cancer Intracranial extension Clinical outcomes Induction chemotherapy and intensity-modulated radiotherapy

Nanoscale strained-Si MOSFET physics and modeling approaches:a review

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2010年第10期31卷 19-23页

作者： amit Chaudhry J.N.Roy Garima joshi University Institute of Engineering and Technology Panjab University Solar Semiconductor Private Limited

An attempt has been made to give a detailed review of strained silicon technology. Various device models have been studied that consider the effect of strain on the devices, and comparisons have been drawn. A review of some modeling issues in strained silicon technology has also been outlined. The review indicates that this technology is very much required in nanoscale MOSFETs due to its several potential benefits, and there is a strong need for an analytical model which describes the complete physics of the strain technology.

关键词： mobility SiGe strained-Si technology CAD

An updated review on activated PI3 kinase delta syndrome(APDS)

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2020年第1期7卷 67-74页

作者： Ankita Singh Vibhu joshi Ankur Kumar Jindal Babu Mathew amit Rawat Allergy Immunology Unit Department of PediatricsAdvanced Pediatrics CentrePostgraduate Institute of Medical Education and ResearchChandigarhIndia

Activated Phosphoinositide 3-kinase d syndrome(APDS)is a newly recognised primary immunodeficiency *** has currently been a hot topic of clinical research and new data are emerging regarding its pathogenesis,clinical manifestations and *** with APDS syndrome have significant autoimmune manifestations and *** is important to differentiate APDS from the usual polygenic CVID in view of the availability of targeted therapy like mTOR inhibitors such as Rapamycin and selective PI3Kd *** provide a comprehensive review on this interesting disorder focusing light on its etiology,genetic research and emerging therapy.

关键词： Activated phosphoinositide 3-kinase d syndrome(APDS) Gain of function Immunodeficiency Lymphadenopathy Lymphoproliferation p110d-activating mutation causing senescent T cells

An updated review on phenocopies of primary immunodeficiency diseases

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2020年第1期7卷 12-25页

作者： Ankita Singh Ankur K.Jindal Vibhu joshi Gummadi Anjani amit Rawat Allergy Immunology Unit Department of PediatricsAdvanced Pediatrics CentrePostgraduate Institute of Medical Education and ResearchChandigarhIndia

Primary immunodeficiency diseases(PIDs)refer to a heterogenous group of disorders characterized clinically by increased susceptibility to infections,autoimmunity and increased risk of *** group of disorders present with clinical manifestations similar to PIDs with known genetic defects but have either no genetic defect or have a somatic mutation and thus have been labelled as“Phenocopies of PIDs”.These diseases have been further subdivided into those associated with somatic mutations and those associated with presence of auto-antibodies against various *** this review,we provide an update on clinical manifestations,diagnosis and management of these diseases.

关键词： Anti-cytokine antibodies Phenocopies Primary immunodeficiency diseases Somatic mutations