24 results on '"Ananya Gupta"'
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2. Vision based bridge safety monitoring system using WSN-IoT
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Himanshu Sharma, Ananya Gupta, Anjali Sharma, and Yashika Gupta
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Vision based ,Computer science ,business.industry ,Internet of Things ,business ,Bridge (interpersonal) ,Construction engineering ,Safety monitoring - Published
- 2021
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3. User-Controlled Content Translation in Social Media
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Ananya Gupta
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World Wide Web ,Social network ,Machine translation ,Computer science ,business.industry ,Control (management) ,Social media ,business ,Content (Freudian dream analysis) ,computer.software_genre ,Transparency (behavior) ,computer - Abstract
As it has become increasingly common for social network users to write and view post in languages other than English, most social networks now provide machine translations to allow posts to be read by an audience beyond native speakers. However, authors typically cannot view the translations of their posts and have little control over these translations. To address this issue, I am developing a prototype that will provide authors with transparency of and more personalized control over the translation of their posts.
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- 2021
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4. Data resource profile: Understanding the patterns and determinants of health in South Asians—the South Asia Biobank
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Khadija Irfan Khawaja, Franco Sassi, Nita G. Forouhi, Prasad Katulanda, Ananya Gupta, Anuradhani Kasturiratne, Ananda R. Wickremasinghe, Rajendra Pradeepa, Sajjad Ahmed, Sujeet Jha, Jaspal S. Kooner, Mehedi Hasan, Samreen Siddiqui, Gary Frost, Nicholas J. Wareham, Ian Y. Goon, Peige Song, Ranjit Mohan Anjana, Marie Loh, Malay K Mridha, Soren Brage, Sara Mahmood, John C. Chambers, Marisa Miraldo, Dian Kusuma, National Institute for Health Research, Song, Peige [0000-0002-0196-9759], Frost, Gary S [0000-0003-0529-6325], Kusuma, Dian [0000-0002-1909-9341], Brage, Soren [0000-0002-1265-7355], Mridha, Malay K [0000-0001-9226-457X], and Apollo - University of Cambridge Repository
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South asia ,Resource (biology) ,Asia ,business.industry ,Epidemiology ,0104 Statistics ,MEDLINE ,South Asia Biobank. Remaining authors are listed at the end of the article ,General Medicine ,Biobank ,1117 Public Health and Health Services ,Asian People ,RA0421 ,Risk Factors ,Medicine ,Humans ,AcademicSubjects/MED00860 ,Social determinants of health ,Data Resource Profiles ,Socioeconomics ,business ,RC ,Biological Specimen Banks - Abstract
Funder: Singapore Ministry of Health's National Medical Research Council, Funder: National Institute for Health Research, Funder: Wellcome Trust or the Department of Health, Funder: NIHR Biomedical Research Centre Cambridge: Nutrition, Diet, and Lifestyle Research Theme; Grant(s): IS-BRC-1215-20014
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- 2021
5. Data Resource Profile: Understanding the patterns and determinants of health in South Asians - South Asia Biobank
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Jaspal S. Kooner, Anuradhani Kasturiratne, Malabika Sarker, Marisa Miraldo, Samreen Siddiqui, Fred Hersch, Rajendra Pradeepa, Sujeet Jha, Ranjit Mohan Anjana, Marie Loh, Franco Sassi, Malay K Mridha, Sophie E. Day, Garudam R Aarthi, Polly Page, Jonathan Valabhji, Mehedi Hasan, Soren Brage, Ian Y. Goon, Sara Mahmood, Rajan Kamalesh, John C. Chambers, Wnurinham Silva, Ananda R. Wickremasinghe, Peige Song, Khadija Irfan Khawaja, Gary Frost, Sajjad Ahmed, Nicholas J. Wareham, Baldeesh Rai, Ananya Gupta, Saira Afzal, Bridget A. Holmes, Prasad Katulanda, Dian Kusuma, Elisa Pineda, and Nita G. Forouhi
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education.field_of_study ,Waist ,business.industry ,Population ,Disease ,medicine.disease ,Biobank ,Obesity ,Environmental health ,medicine ,Medical history ,Social determinants of health ,education ,business ,Socioeconomic status - Abstract
Background and aimsThis paper describes the data resource profile of South Asia Biobank (SAB), which was set up in South Asia from November 2018 to March 2020, to identify the risk factors and their complex interactions underlying the development of type-2 diabetes mellitus, cardiovascular disease and other chronic diseases in South Asians.Data resource basicsThis cross-sectional population-based study has recruited 52713 South Asian adults from 118 surveillance sites at five centres of excellence in South Asia (Bangladesh, North India, South India, Pakistan and Sri Lanka). Structured assessments of participants included six complementary domains: i). Registration and consent; ii). Questionnaire (information on behavioural risk factors, personal and family medical history, medications, socioeconomic status); iii). Physical measurements (height, weight, waist and hip circumference and bio-impedance for body fat composition, blood pressure, cardiac evaluation, retinal photography, respiratory evaluation); iv). Biological samples (blood and urine); v). Physical activity monitoring and vi). Dietary intake by a 24-hour recall. Aliquots of whole blood, serum, plasma, and urine were put into storage at −80°C for further analysis.Key resultsThe prevalence of obesity is 6.6% in Bangladesh, 19.7% in India, 33.9% in Pakistan and 15.7% in Sri Lanka. The prevalence of diabetes is 11.5%, 27.7%, 25.3%, and 24.8%, and the prevalence of hypertension is 26.7%, 36.9%, 44.5%, 35.0% in Bangladesh, India, Pakistan and Sri Lanka respectively.Collaboration and data accessSAB is the first comprehensive biobank of South Asian individuals. Collected data are available to the global scientific community upon request.
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- 2020
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6. Tree Annotations in LiDAR Data Using Point Densities and Convolutional Neural Networks
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Simon Watson, Jonathan Byrne, Ananya Gupta, David Moloney, and Hujun Yin
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FOS: Computer and information sciences ,Computer science ,Computer Vision and Pattern Recognition (cs.CV) ,Feature extraction ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,0211 other engineering and technologies ,Point cloud ,Computer Science - Computer Vision and Pattern Recognition ,02 engineering and technology ,Convolutional neural network ,Set (abstract data type) ,Deep Learning ,Airborne LiDAR ,Point (geometry) ,Electrical and Electronic Engineering ,021101 geological & geomatics engineering ,Tree Segmentation ,business.industry ,Deep learning ,Pattern recognition ,Vegetation ,Tree (data structure) ,Lidar ,General Earth and Planetary Sciences ,Artificial intelligence ,business ,Computer Science(all) - Abstract
LiDAR provides highly accurate 3-D point clouds. However, data need to be manually labeled in order to provide subsequent useful information. Manual annotation of such data is time-consuming, tedious, and error prone, and hence, in this article, we present three automatic methods for annotating trees in LiDAR data. The first method requires high-density point clouds and uses certain LiDAR data attributes for the purpose of tree identification, achieving almost 90% accuracy. The second method uses a voxel-based 3-D convolutional neural network on low-density LiDAR data sets and is able to identify most large trees accurately but struggles with smaller ones due to the voxelization process. The third method is a scaled version of the PointNet++ method and works directly on outdoor point clouds and achieves an $F_{\mathrm{ score}}$ of 82.1% on the ISPRS benchmark data set, comparable to the state-of-the-art methods but with increased efficiency.
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- 2020
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7. Deep Learning-based Aerial Image Segmentation with Open Data for Disaster Impact Assessment
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Hujun Yin, Ananya Gupta, and Simon Watson
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FOS: Computer and information sciences ,0209 industrial biotechnology ,Computer science ,Cognitive Neuroscience ,Computer Vision and Pattern Recognition (cs.CV) ,Computer Science - Computer Vision and Pattern Recognition ,02 engineering and technology ,Machine learning ,computer.software_genre ,020901 industrial engineering & automation ,Resource (project management) ,Artificial Intelligence ,0202 electrical engineering, electronic engineering, information engineering ,FOS: Electrical engineering, electronic engineering, information engineering ,Segmentation ,Aerial image ,Artificial neural network ,business.industry ,Deep learning ,Image and Video Processing (eess.IV) ,Electrical Engineering and Systems Science - Image and Video Processing ,Computer Science Applications ,Open data ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,computer - Abstract
Satellite images are an extremely valuable resource in the aftermath of natural disasters such as hurricanes and tsunamis where they can be used for risk assessment and disaster management. In order to provide timely and actionable information for disaster response, in this paper a framework utilising segmentation neural networks is proposed to identify impacted areas and accessible roads in post-disaster scenarios. The effectiveness of pretraining with ImageNet on the task of aerial image segmentation has been analysed and performances of popular segmentation models compared. Experimental results show that pretraining on ImageNet usually improves the segmentation performance for a number of models. Open data available from OpenStreetMap (OSM) is used for training, forgoing the need for time-consuming manual annotation. The method also makes use of graph theory to update road network data available from OSM and to detect the changes caused by a natural disaster. Extensive experiments on data from the 2018 tsunami that struck Palu, Indonesia show the effectiveness of the proposed framework. ENetSeparable, with 30% fewer parameters compared to ENet, achieved comparable segmentation results to that of the state-of-the-art networks., Comment: Accepted in Neurocomputing, 2020
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- 2020
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8. 3D Point Cloud Feature Explanations Using Gradient-Based Methods
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Ananya Gupta, Hujun Yin, and Simon Watson
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FOS: Computer and information sciences ,Artificial neural network ,Computer science ,business.industry ,Computer Vision and Pattern Recognition (cs.CV) ,Point cloud ,Computer Science - Computer Vision and Pattern Recognition ,020206 networking & telecommunications ,Pattern recognition ,02 engineering and technology ,010501 environmental sciences ,computer.software_genre ,01 natural sciences ,Backpropagation ,Image (mathematics) ,Data modeling ,Voxel ,Feature (computer vision) ,0202 electrical engineering, electronic engineering, information engineering ,Saliency map ,Artificial intelligence ,business ,computer ,0105 earth and related environmental sciences - Abstract
Explainability is an important factor to drive user trust in the use of neural networks for tasks with material impact. However, most of the work done in this area focuses on image analysis and does not take into account 3D data. We extend the saliency methods that have been shown to work on image data to deal with 3D data. We analyse the features in point clouds and voxel spaces and show that edges and corners in 3D data are deemed as important features while planar surfaces are deemed less important. The approach is model-agnostic and can provide useful information about learnt features. Driven by the insight that 3D data is inherently sparse, we visualise the features learnt by a voxel-based classification network and show that these features are also sparse and can be pruned relatively easily, leading to more efficient neural networks. Our results show that the Voxception-ResNet model can be pruned down to 5\% of its parameters with negligible loss in accuracy., Comment: Accepted for IJCNN 2020
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- 2020
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9. Investigation of Anemia and the Dielectric Properties of Human Blood at Microwave Frequencies
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Adam Santorelli, Amjad Hayat, Martin O'Halloran, Ananya Gupta, Mark Lyons, Benazir Abbasi, and Sanjeev Gupta
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Permittivity ,General Computer Science ,Anemia ,02 engineering and technology ,Dielectric ,support vector machines ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,open-ended coaxial probe ,0202 electrical engineering, electronic engineering, information engineering ,dielectric measurements ,Medicine ,General Materials Science ,Whole blood ,Human blood ,business.industry ,General Engineering ,020206 networking & telecommunications ,medicine.disease ,3. Good health ,tissue properties ,Biological material ,classification algorithms ,Multiple linear regression analysis ,Hemoglobin ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,business ,lcsh:TK1-9971 ,Microwave ,Biomedical engineering - Abstract
Anemia is a condition that affects over 1.6 billion people worldwide untreated, the disease could lead to increased morbidity and mortality during pregnancy, affecting both the mother and the unborn child. This paper presents the measured dielectric properties of whole blood samples from 176 patients obtained from a hematology clinic; with 80 samples from male patients and 96 samples from female patients. Measurements were performed using a Keysight slim form probe and Keysight network analyzer to obtain the dielectric properties over a wide frequency range (500 MHz-8.5 GHz). A multiple linear regression analysis is performed to identify which components of the blood show the highest correlation with changes in the dielectric properties. Hemoglobin (Hgb) is shown to be the biggest predictor of changes in complex permittivity, demonstrating that permittivity measurements at a single frequency can potentially be used to detect anemia. A support vector machines algorithm is trained and tested to classify between blood samples from healthy patients and blood samples from patients with anemia. The classifier is optimized using a Bayesian-optimization approach during 10-fold cross-validation and then the average performance of the final trained classifier is evaluated through 10-fold testing on unseen data sets. Using a clinical definition of anemia defined as patients having a concentration of Hgb
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- 2018
10. Mycobacterium indicus pranii Induced Memory T-Cells in Lung Airways Are Sentinels for Improved Protection Against M.tb Infection
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Ananya Gupta, Mohd Saqib, Bindu Singh, Lalit Pal, Akoijam Nishikanta, and Sangeeta Bhaskar
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lcsh:Immunologic diseases. Allergy ,0301 basic medicine ,Tuberculosis ,Mycobacterium indicus pranii ,route of vaccination ,Immunology ,Mycobacterium tuberculosis ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,memory T-cell ,medicine ,Immunology and Allergy ,Original Research ,airway lumen ,Lung ,biology ,business.industry ,Mycobacterium indicus pranii (Mw/MIP) ,chemokine receptor ,respiratory system ,biology.organism_classification ,medicine.disease ,Vaccination ,030104 developmental biology ,medicine.anatomical_structure ,Nasal administration ,lcsh:RC581-607 ,business ,Memory T cell ,030215 immunology - Abstract
The lungs are the most vulnerable site for air-borne infections. Immunologic compartmentalization of the lungs into airway lumen and interstitium has paved the way to determine the immune status of the site of pathogen entry, which is crucial for the outcome of any air-borne infections. Vaccination via the nasal route with Mycobacterium indicus pranii (MIP), a prospective candidate vaccine against tuberculosis (TB), has been reported to confer superior protection as compared to the subcutaneous (s.c.) route in small-animal models of TB. However, the immune mechanism remains only partly understood. Here, we showed that intranasal (i.n.) immunization of mice with MIP resulted in a significant recruitment of CD4+ and CD8+ T-cells expressing activation markers in the lung airway lumen. A strong memory T-cell response was observed in the lung airway lumen after i.n. MIP vaccination, compared with s.c. vaccination. The recruitment of these T-cells was regulated primarily by CXCR3–CXCL11 axis in “MIP i.n.” group. MIP-primed T-cells in the lung airway lumen effectively transferred protective immunity into naïve mice against Mycobacterium tuberculosis (M.tb) infection and helped reducing the pulmonary bacterial burden. These signatures of protective immune response were virtually absent or very low in unimmunized and subcutaneously immunized mice, respectively, before and after M.tb challenge. Our study provides mechanistic insights for MIP-elicited protective response against M.tb infection.
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- 2019
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11. Post Disaster Mapping With Semantic Change Detection in Satellite Imagery
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Ananya Gupta, Hujun Yin, Simon Watson, and Elisabeth Welburn
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Emergency management ,business.industry ,Computer science ,030229 sport sciences ,02 engineering and technology ,03 medical and health sciences ,0302 clinical medicine ,Semantic change ,Data_GENERAL ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Satellite imagery ,Artificial intelligence ,business ,Cartography ,ComputingMilieux_MISCELLANEOUS ,Post disaster ,Risk management - Abstract
Accurate road maps are important for timely disaster relief efforts and risk management. Current disaster mapping is done manually by volunteers following a disaster and the process is slow and error prone. We propose a framework for identifying accessible roads in post-disaster satellite imagery by detecting changes from pre-disaster imagery, in conjunction with OpenStreetMap data. We validate our results with data from Indonesia 2018 tsunami, obtained from DigitalGlobe.
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- 2019
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12. Impact of E-Banking its Growth and Future in India
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Ananya Gupta and Bijendra Pushkar
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Finance ,Service quality ,Hardware_MEMORYSTRUCTURES ,business.industry ,media_common.quotation_subject ,Information technology ,Payment ,Order (exchange) ,Settlement (finance) ,The Internet ,Customer satisfaction ,Business ,Productivity ,media_common - Abstract
E-Banking has become an integral part of the global financial environment. Improvement in technologies and financial innovations has made E-banking is an intense part of the banking sector. “As day by day increasing the technologies are also increasing”. Technology has become the fuel for rapid change. In earlier times, the banking customers were required to visit in a bank in order to transact their accounts in the bank but now by the help of E-Banking the customers do not need to visit in a bank and with the help of internet, customers can easily transact their accounts from anywhere. E- Banking is playing a major role that it’s improving the service quality and strengthens the banking sector because of the electronic payment there is increase in customer satisfaction level, increased productivity, reduction in cost of banking operations, settlement faster and in large volumes. The world has become a global village and it has brought a revolution in the banking industry because of increasing in the development of information technology. The key trends are discussed for their impact on future E-Banking services.
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- 2019
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13. CNN-Based Semantic Change Detection in Satellite Imagery
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Hujun Yin, Ananya Gupta, Simon Watson, and Elisabeth Welburn
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Computer science ,business.industry ,Process (computing) ,Graph theory ,030229 sport sciences ,02 engineering and technology ,Network topology ,computer.software_genre ,Convolutional neural network ,03 medical and health sciences ,0302 clinical medicine ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Satellite ,Segmentation ,Satellite imagery ,Data mining ,business ,computer ,Risk management - Abstract
Timely disaster risk management requires accurate road maps and prompt damage assessment. Currently, this is done by volunteers manually marking satellite imagery of affected areas but this process is slow and often error-prone. Segmentation algorithms can be applied to satellite images to detect road networks. However, existing methods are unsuitable for disaster-struck areas as they make assumptions about the road network topology which may no longer be valid in these scenarios. Herein, we propose a CNN-based framework for identifying accessible roads in post-disaster imagery by detecting changes from pre-disaster imagery. Graph theory is combined with the CNN output for detecting semantic changes in road networks with OpenStreetMap data. Our results are validated with data of a tsunami-affected region in Palu, Indonesia acquired from DigitalGlobe.
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- 2019
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14. Threat Identification in Humanitarian Demining Using Machine Learning and Spectroscopic Metal Detection
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Anthony Peyton, Toykan Özdeǧer, Wouter van Verre, Frank J. W. Podd, and Ananya Gupta
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050101 languages & linguistics ,Artificial neural network ,business.industry ,Computer science ,05 social sciences ,02 engineering and technology ,Machine learning ,computer.software_genre ,Humanitarian demining ,Constant false alarm rate ,Support vector machine ,0202 electrical engineering, electronic engineering, information engineering ,Clutter ,020201 artificial intelligence & image processing ,0501 psychology and cognitive sciences ,Artificial intelligence ,business ,computer ,Classifier (UML) - Abstract
The detection of buried minimum-metal anti-personnel landmines is a time-consuming problem, due to the high false alarm rate (FAR) arising from metallic clutter typically found in minefields. Magnetic induction spectroscopy (MIS) offers a potential way to reduce the FAR by classifying the metallic objects into threat and non-threat categories, based on their spectroscopic signatures. A new algorithm for threat identification for MIS sensors, based on a fully-connected artificial neural network (ANN), is proposed in this paper, and compared against a classifier based on Support Vector Machines (SVM). The results demonstrate that MIS is a potentially viable option for the reduction of false alarms in humanitarian demining. It is also shown that the ANN outperforms the SVM-based approach for threat objects containing minimal amounts of metal.
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- 2019
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15. Speckle Noise Suppression in Ultrasound Images by Using an Improved Non-local Mean Filter
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Aditi Gupta, Vikrant Bhateja, Ananya Gupta, Avantika Srivastava, and Suresh Chandra Satapathy
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Quality (physics) ,business.industry ,Computer science ,Image quality ,Noise reduction ,Ultrasound ,Median filter ,Computer vision ,Speckle noise ,Artificial intelligence ,Bilateral filter ,Filter (signal processing) ,business - Abstract
In medical field, ultrasound imaging technique is a major medium for the doctors and radiologists to diagnose the patient’s problem. The presence of speckle noise degrades the visuals of the ultrasound image and making it difficult for the doctors to diagnose properly. Hence, denoising and restoration of these images came up as a challenge to enhance the quality of the image. In this paper, an improved non-local mean filter is proposed for suppression of speckle noise in ultrasound image. This improved filter is the combination of two conventional filters, i.e., non-local mean filter and bilateral filter. The newly modified method which is emerged by combining the functions of both the conventional filters results in the improvement of quality of image. The three image quality assessment parameters are being used to analyze the performance of improved non-local mean filter, i.e., peak signal-to-noise-ratio (PSNR) and structural similarity (SSIM).
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- 2019
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16. Multitemporal Aerial Image Registration Using Semantic Features
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Ananya Gupta, Simon Watson, Hujun Yin, and Yao Peng
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050101 languages & linguistics ,Semantic feature ,business.industry ,Computer science ,05 social sciences ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Image registration ,Pattern recognition ,02 engineering and technology ,ENCODE ,Convolutional neural network ,Robustness (computer science) ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,0501 psychology and cognitive sciences ,Segmentation ,Artificial intelligence ,Invariant (mathematics) ,business ,Aerial image - Abstract
A semantic feature extraction method for multitemporal high resolution aerial image registration is proposed in this paper. These features encode properties or information about temporally invariant objects such as roads and help deal with issues such as changing foliage in image registration, which classical handcrafted features are unable to address. These features are extracted from a semantic segmentation network and have shown good robustness and accuracy in registering aerial images across years and seasons in the experiments.
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- 2019
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17. Mycobacterium indicus pranii as a booster vaccine enhances BCG induced immunity and confers higher protection in animal models of tuberculosis
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Arvind Kumar, Ananya Gupta, Sangeeta Bhaskar, Rahul Khatri, Mohd Saqib, and Bindu Singh
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0301 basic medicine ,Microbiology (medical) ,Tuberculosis ,Mycobacterium indicus pranii ,Guinea Pigs ,030106 microbiology ,Immunology ,Immunization, Secondary ,Antigen-Presenting Cells ,Booster dose ,complex mixtures ,Microbiology ,Interferon-gamma ,03 medical and health sciences ,Immune system ,T-Lymphocyte Subsets ,Immunity ,Animals ,Medicine ,Tuberculosis Vaccines ,Lung ,Booster (rocketry) ,biology ,business.industry ,Nontuberculous Mycobacteria ,Mycobacterium tuberculosis ,biology.organism_classification ,medicine.disease ,Virology ,Bacterial Load ,030104 developmental biology ,Infectious Diseases ,Immunization ,BCG Vaccine ,Cytokines ,Female ,business ,Immunologic Memory ,BCG vaccine ,Spleen - Abstract
BCG, the only approved vaccine protects against severe form of childhood tuberculosis but its protective efficacy wanes in adolescence. BCG has reduced the incidence of infant TB considerably in endemic areas; therefore prime-boost strategy is the most realistic measure for control of tuberculosis in near future. Mycobacterium indicus pranii (MIP) shares significant antigenic repertoire with Mtb and BCG and has been shown to impart significant protection in animal models of tuberculosis. In this study, MIP was given as a booster to BCG vaccine which enhanced the BCG mediated immune response, resulting in higher protection. MIP booster via aerosol route was found to be more effective in protection than subcutaneous route of booster immunization. Pro-inflammatory cytokines like IFN-γ, IL-12 and IL-17 were induced at higher level in infected lungs of 'BCG-MIP' group both at mRNA expression level and in secretory form when compared with 'only BCG' group. BCG-MIP groups had increased frequency of multifunctional T cells with high MFI for IFN-γ and TNF-α in Mtb infected mice. Our data demonstrate for the first time, potential application of MIP as a booster to BCG vaccine for efficient protection against tuberculosis. This could be very cost effective strategy for efficient control of tuberculosis.
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- 2016
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18. Suppression of Speckle Noise in Ultrasound Images Using Bilateral Filter
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Ananya Gupta, Vikrant Bhateja, Avantika Srivastava, and Aditi Gupta
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Pixel ,business.industry ,Image quality ,Computer science ,020208 electrical & electronic engineering ,010401 analytical chemistry ,Speckle noise ,02 engineering and technology ,Filter (signal processing) ,01 natural sciences ,0104 chemical sciences ,Intensity (physics) ,symbols.namesake ,Gaussian noise ,0202 electrical engineering, electronic engineering, information engineering ,Gaussian function ,symbols ,Computer vision ,Artificial intelligence ,Bilateral filter ,business - Abstract
The suppression of speckle noise is necessary for clear vision of ultrasound images. The quality of ultrasound images is degraded by the presence of speckle noise. In this work, bilateral Filter is used to suppress speckle noise. Conventionally, this filter is used to suppress the Gaussian noise from the images. A bilateral filter is better at edge preserving, noise suppression and for better smoothening of gray as well as colored images. Bilateral filter tends to improve image quality as it replaces the intensity of each pixel with a weighted average of intensity values from nearby pixels. These weights are basically based on Gaussian distribution function. The three parameters have been used to analyze the performance of bilateral filter the are PSNR, SSIM, and SSI.
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- 2018
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19. Non-local Mean Filter for Suppression of Speckle Noise in Ultrasound Images
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Aditi Gupta, Vikrant Bhateja, Ananya Gupta, and Avantika Srivastava
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Computer science ,business.industry ,Image quality ,Ultrasound ,020206 networking & telecommunications ,Speckle noise ,02 engineering and technology ,Filter (signal processing) ,01 natural sciences ,Multiplicative noise ,Noise ,Speckle pattern ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Median filter ,Computer vision ,Artificial intelligence ,business ,010301 acoustics - Abstract
The speckle suppression is very important for carrying out proper clinical operation in ultrasound images. Speckle is a kind of multiplicative noise which exists inherently within the ultrasound images. Although there are many speckle noise suppression filters from the ultrasound images, it possesses certain constraints. In this paper, the Non-local Mean (NLM) filter is used to suppress speckle noise from ultrasound images. NLM filter consists of two windows that are search and similarity windows which can improve upon the limitation of many conventional filters. The simulation results of NLM filter for the values of different noise variances on ultrasound image are shown. Finally, the performance analysis is done by image quality assessment parameters like Peak Signal-to-Noise Ratio (PSNR) and Coefficient of Correlation (CoC).
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- 2018
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20. Hyperactivation of nuclear receptor coactivators induces PERK-dependent cell death
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Ananya Gupta, Sanjeev Gupta, Vahid Arabkari, Nahidul Islam, Muhammad Mosaraf Hossain, and David Barua
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0301 basic medicine ,PERK ,Programmed cell death ,endocrine system ,XBP1 ,business.industry ,ATF6 ,unfolded protein response ,Cell fate determination ,steroid receptor coactivators ,3. Good health ,03 medical and health sciences ,030104 developmental biology ,breast cancer ,Oncology ,Nuclear receptor ,Cancer research ,Unfolded protein response ,Medicine ,NCOA3 ,Receptor ,business ,Transcription factor ,Research Paper - Abstract
// Muhammad Mosaraf Hossain 1 , David Barua 1 , Vahid Arabkari 1 , Nahidul Islam 2 , Ananya Gupta 3 and Sanjeev Gupta 1 1 Discipline of Pathology, School of Medicine, Lambe Institute for Translational Research, National University of Ireland Galway, Galway, Ireland 2 Regenerative Medicine Institute (REMEDI) at CURAM Centre for Research in Medical Devices, School of Medicine, College of Medicine, Nursing and Health Sciences, National University of Ireland Galway, Galway, Ireland 3 Discipline of Physiology, School of Medicine, National University of Ireland Galway, Galway, Ireland Correspondence to: Sanjeev Gupta, email: sanjeev.gupta@nuigalway.ie Keywords: steroid receptor coactivators; unfolded protein response; breast cancer; PERK; NCOA3 Received: November 03, 2017 Accepted: February 01, 2018 Published: February 08, 2018 ABSTRACT Nuclear receptor coactivators (NCOAs) function as coactivators for nuclear receptors as well as several other transcription factors and potentiate their transcriptional activity. NCOAs play an important role in biology of hormone-dependent and -independent cancers. MCB-613 is a recently described, small molecule stimulator of NCOAs and anti-neoplastic compound that leads to the death of tumour cells due to increased cellular stress. In the present study we investigated the molecular mechanism of MCB-613-induced cell death. We report that absence of NCOA3 leads to compromised activation of PERK signalling pathway during unfolded protein response (UPR). We found that chemical and genetic inhibition of NCOA3 attenuated the expression of PERK at mRNA and protein level. We show that loss of NCOA3 renders cells hypersensitive to UPR induced cell death. Our results show that MCB-613 induced cell death is attenuated in NCOA3 knockout HeLa cells and MCB-613 leads to enhanced PERK signalling in wild-type HeLa cells. The knockdown of PERK provides resistance to MCB-613 mediated cell death while knockdown of XBP1 and ATF6 have no such effect. Our results suggest that hyperstimulation of NCOA3 by MCB-613 induces cell death by evoking constitutive PERK signalling. Taken together our results point to NCOA3 as an important determinant in regulating cell fate during ER stress, with too little and too much NCOA3 both producing deleterious effects.
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- 2018
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21. Reduced CREB3L2 expression is associated with resistance to sorafenib and poor prognosis in ER-positive breast cancer
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Sean Mullarkey, Vahid Arabkari, Muhammad Mosaraf Hossain, Sanjeev Gupta, and Ananya Gupta
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Sorafenib ,Drug ,Poor prognosis ,business.industry ,media_common.quotation_subject ,Sorafenib treatment ,Estrogen receptor ,Cancer ,Pharmacology ,urologic and male genital diseases ,medicine.disease ,female genital diseases and pregnancy complications ,digestive system diseases ,Breast cancer ,Cancer research ,Medicine ,Biomarker (medicine) ,heterocyclic compounds ,business ,neoplasms ,medicine.drug ,media_common - Abstract
Sorafenib is a multikinase inhibitor that acts by inhibiting tumour growth and disrupting tumour microvasculature through anti-proliferative, anti-angiogenic, and pro-apoptotic effects. However, development of resistance to sorafenib often prevents its long-term efficacy. No validated biomarkers currently exist for appropriately selecting patients with cancer for sorafenib treatment. In the present study, we report that CREB3L2 expression in human breast cancer cell lines is a marker of response to sorafenib. Analysis of human breast cancer cell lines using Oncomine database and Genomics of Drug Sensitivity in Cancer (GDSC) database revealed an association between reduced expression of CREB3L2 and sensitivity to sorafenib. Wet lab experiment in five human breast cancer cell lines confirmed the association between reduced expression of CREB3L2 and sensitivity to sorafenib. Further, reduced expression of CREB3L2 was associated with poor Reccurence Free Survival in Luminal breast cancer. Our results suggest that CREB3L2 expression is a biomarker of response to sorafenib and outcome in breast cancer.
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- 2016
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22. Decentralized key generation scheme for cellular-based heterogeneous wireless ad hoc networks
- Author
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Anindo Mukherjee, Bin Xie, Ananya Gupta, and Dharma P. Agrawal
- Subjects
Key generation ,Computer Networks and Communications ,Wireless network ,Computer science ,business.industry ,Wireless ad hoc network ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Mobile computing ,Cryptography ,Mobile ad hoc network ,Theoretical Computer Science ,Base station ,Symmetric-key algorithm ,Artificial Intelligence ,Hardware and Architecture ,Distributed algorithm ,Key (cryptography) ,Cellular network ,business ,Security level ,Software ,Heterogeneous network ,Computer network - Abstract
With the support of cellular system a cellular-based mobile ad hoc network (MANET) offers promising communication scenarios while entails secure data exchange as other wireless systems. In this paper, we propose a novel decentralized key generation mechanism using shared symmetric polynomials in which the base stations (BSs) carry out an initial key generation by a symmetric polynomial in a distributed manner and then pass on the key material to mobile stations (MSs). Thereafter, our proposed key generation scheme enables each pair of MSs to establish a pairwise key without any intervention from the BS, thus reducing the management cost for the BS. The shared key between two MSs is computed without any interaction between them. In addition, the trust among MSs is derived from the cellular infrastructure, thus enjoying an equal security level as provided in the underlying cellular network. Simulations are done to observe the system performance and the results are very encouraging.
- Published
- 2007
- Full Text
- View/download PDF
23. 3D Convolutional Neural Networks for Tree Detection using Automatically Annotated LiDAR data
- Author
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David Moloney, Hujun Yin, Ananya Gupta, Jonathan J. Byrne, and Simon Watson
- Subjects
Tree (data structure) ,Computer science ,business.industry ,Pattern recognition ,Lidar data ,Artificial intelligence ,business ,Convolutional neural network
24. A Mixed Reality Approach to Robotic Inspection of Remote Environments
- Author
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Tommy Wright, Conor Marsh, Sean Lim, Simon Watson, Elisabeth Welburn, Bill Crowther, and Ananya Gupta
- Subjects
robotics ,Human–computer interaction ,Computer science ,business.industry ,Wind farms ,virtual reality ,Robotics ,Artificial intelligence ,Virtual reality ,extreme environments ,business ,mixed reality ,Mixed reality - Abstract
Currently, inspection of remote environments poses potential hazards to the human operator. Mixed reality presents the unique opportunity for the human operators & the piloted robots to co-exist within a virtual world that is then spatially mapped to the physical world. This can then act as a platform to conduct remote inspection, where the human operators could potentially possess heightened situational awareness and control.
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