ORCID Profile
0000-0002-3635-4252
Current Organisations
Curtin University
,
University of Melbourne
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Signal Processing | Communications Technologies | Computer Communications Networks | Signal Processing | Systems Theory And Control | Biomedical Engineering | Electrical and Electronic Engineering | Artificial Intelligence and Image Processing | Automotive Engineering | Optimisation | Automotive Engineering | Structural Engineering | Biomedical Engineering not elsewhere classified | Simulation And Modelling | Pattern Recognition and Data Mining | Distributed and Grid Systems | Image Processing | Pattern Recognition | Catalytic Process Engineering | Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels) | Stochastic Analysis And Modelling | Other Electronic Engineering | Polymers and Plastics | Engineering/Technology Instrumentation | Neurobiology | Composite and Hybrid Materials | Cardiology (incl. Cardiovascular Diseases) | Transport Engineering | Applied Mathematics | Broadband Network Technology | Construction Materials | Environmental Engineering | Civil Engineering | Chemical Engineering | Nanomaterials | Forestry Biomass and Bioproducts | Photonic and electro-optical devices sensors and systems (excl. communications) | Manufacturing Engineering Not Elsewhere Classified | Distributed Computing | Knowledge Representation and Machine Learning | Manufacturing Engineering | Control Engineering | Horticultural Crop Protection (Pests, Diseases and Weeds) | Materials Engineering | Robotics And Mechatronics | Biomedical Engineering Not Elsewhere Classified | Optical fibre communication systems and technologies | Data Security | Decision Support And Group Support Systems | Biomedical Instrumentation | Medical Devices | Crop and Pasture Production | Road And Rail Transportation | Wireless Communications | Environmental Engineering Modelling | Foetal Development and Medicine | Ubiquitous Computing | Computer Vision | Mobile Technologies | Networking and Communications | Transport Engineering | Crop and Pasture Protection (Pests, Diseases and Weeds) | Crop and Pasture Biomass and Bioproducts | Electronics sensors and digital hardware | Computer Communications Networks |
Information processing services | Information Processing Services (incl. Data Entry and Capture) | Expanding Knowledge in Technology | Expanding Knowledge in Engineering | Road safety | Information and Communication Services not elsewhere classified | Computer equipment | Hydrogen Storage | Telecommunications | Combined operations | Automotive equipment | Mobile Data Networks and Services | Diagnostic methods | Diagnostic Methods | Weather | Application tools and system utilities | Atmospheric Composition (incl. Greenhouse Gas Inventory) | Data, image and text equipment | Environmentally Sustainable Manufacturing not elsewhere classified | Other road transport | Clay Products | Urban and Industrial Air Quality | Modules—special and attached processors | Communication services not elsewhere classified | Application Tools and System Utilities | Medical Instruments | Health Status (e.g. Indicators of Well-Being) | Hydrogen Distribution | Integrated (ecosystem) assessment and management | Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments | Forestry not elsewhere classified | Construction Materials Performance and Processes not elsewhere classified | Medical instrumentation | Expanding Knowledge in the Medical and Health Sciences | Scientific instrumentation | Hydrogen Production from Renewable Energy | Computer software and services not elsewhere classified | Plastic Products (incl. Construction Materials) | Transport not elsewhere classified | Environmentally Sustainable Transport not elsewhere classified | Machinery and equipment not elsewhere classified
Publisher: Elsevier BV
Date: 07-2019
Publisher: IEEE
Date: 08-2017
Publisher: Wiley
Date: 02-2011
DOI: 10.1111/J.1754-9485.2010.02231.X
Abstract: Positron emission tomography (PET) is a state-of-the-art functional imaging technique used in the accurate detection of cancer. The main problem with the tumours present in the lungs is that they are non-stationary during each respiratory cycle. Tumours in the lungs can get displaced up to 2.5 cm during respiration. Accurate detection of the tumour enables avoiding the addition of extra margin around the tumour that is usually used during radiotherapy treatment planning. This paper presents a novel method to detect and track tumour in respiratory-gated PET images. The approach followed to achieve this task is to automatically delineate the tumour from the first frame using support vector machines. The resulting volume and position information from the first frame is used in tracking its motion in the subsequent frames with the help of level set (LS) deformable model. An excellent accuracy of 97% is obtained using wavelets and support vector machines. The volume calculated as a result of the machine learning (ML) stage is used as a constraint for deformable models and the tumour is tracked in the remaining seven phases of the respiratory cycle. As a result, the complete information about tumour movement during each respiratory cycle is available in relatively short time. The combination of the LS and ML approach accurately delineated the tumour volume from all frames, thereby providing a scope of using PET images towards planning an accurate and effective radiotherapy treatment for lung cancer.
Publisher: Springer Berlin Heidelberg
Date: 2013
Publisher: IEEE
Date: 08-2015
Publisher: Physicians Postgraduate Press, Inc
Date: 26-09-2019
DOI: 10.4088/PCC.19M02470
Publisher: IEEE
Publisher: IEEE
Date: 09-2008
Publisher: Springer London
Date: 2009
Publisher: IEEE
Date: 07-2018
Publisher: Springer London
Date: 2008
Publisher: IEEE
Date: 11-2014
Publisher: IEEE
Publisher: IEEE
Publisher: Association for Computing Machinery (ACM)
Date: 24-08-2017
DOI: 10.1145/3085579
Abstract: With the advancement in the Internet of Things (IoT) technologies, variety of sensors including inexpensive, low-precision sensors with sufficient computing and communication capabilities are increasingly deployed for monitoring large geographical areas. One of the problems with the use of inexpensive sensors is that they often suffer from random or systematic errors such as drift. The sensor drift is the result of slow changes that occur in the measurement driven by aging, loss of calibration, and changes in the phenomena being monitored over a time period. These drifting sensors need to be calibrated automatically for continuous and reliable monitoring. Existing methods for drift detection and correction do not consider the measurement errors or uncertainties present in those inexpensive low-precision sensors, hence, resulting in unreliable drift estimates. In this article, we propose a novel framework to automatically detect and correct the drifts by employing Bayesian Maximum Entropy (BME) and Kalman filtering (KF) techniques. The BME method is a spatiotemporal estimation method that incorporates the measurement errors of low-precision sensors as interval quantities along with the high-precision sensor measurements in their computations. Our scheme can be implemented in a centralized as well as in a distributed manner to detect and correct the drift generated in the sensors. For the centralized scheme, we compare several Kriging-based estimation techniques in combination with KF, and show the superiority of our proposed BME-based method in detecting and correcting the drift. We also propose a multivariate BME framework for drift detection, in which multiple features can be used to improve the drift estimates. To demonstrate the applicability of our distributed approach on a real-world application scenario, we implemented our algorithm on each wireless sensor node in order to perform in-network drift detection. The evaluation on real IoT datasets gathered from an indoor and an outdoor deployments reveal the superiority of our method in correctly identifying and correcting the drifts that develop in the sensors, in real time, compared to the existing approaches in the literature.
Publisher: IEEE
Publisher: Wiley
Date: 11-04-2019
DOI: 10.1002/DAC.3954
Publisher: Springer Science and Business Media LLC
Date: 23-09-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2017
Publisher: IEEE
Date: 07-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2021
Publisher: IEEE
Date: 04-2007
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2009
Publisher: IOP Publishing
Date: 11-2018
Abstract: Non-invasive fetal electrocardiography (NI-FECG) shows promise for capturing novel physiological information that may indicate signs of fetal distress. However, significant deterioration in NI-FECG signal quality occurs during the presence of a highly non-conductive layer known as vernix caseosa which forms on the fetal body surface beginning in approximately the 28th week of gestation. This work investigates asymmetric modeling of vernix caseosa and other maternal-fetal tissues in accordance with clinical observations and assesses their impacts for NI-FECG signal processing. We develop a process for simulating dynamic maternal-fetal abdominal ECG mixtures using a synthetic cardiac source model embedded in a finite element volume conductor. Using this process, changes in NI-FECG signal morphology are assessed in an extensive set of finite element models including spatially variable distributions of vernix caseosa. Our simulations show that volume conductor asymmetry can result in over 70% error in the observed T/QRS ratio and significant changes to signal morphology compared to a homogeneous volume conductor model. Volume conductor effects must be considered when analyzing T/QRS ratios obtained via NI-FECG and should be considered in future algorithm benchmarks using simulated data. This work shows that without knowledge of the influence of volume conductor effects, clinical evaluation of the T/QRS ratio derived via NI-FECG should be avoided.
Publisher: ICST
Date: 2008
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2019
Publisher: Association for Computing Machinery (ACM)
Date: 03-12-2016
DOI: 10.1145/2997656
Abstract: The growth in pervasive network infrastructure called the Internet of Things (IoT) enables a wide range of physical objects and environments to be monitored in fine spatial and temporal detail. The detailed, dynamic data that are collected in large quantities from sensor devices provide the basis for a variety of applications. Automatic interpretation of these evolving large data is required for timely detection of interesting events. This article develops and exemplifies two new relatives of the visual assessment of tendency (VAT) and improved visual assessment of tendency (iVAT) models, which uses cluster heat maps to visualize structure in static datasets. One new model is initialized with a static VAT/iVAT image, and then incrementally (hence inc-VAT/inc-iVAT) updates the current minimal spanning tree (MST) used by VAT with an efficient edge insertion scheme. Similarly, dec-VAT/dec-iVAT efficiently removes a node from the current VAT MST. A sequence of inc-iVAT/dec-iVAT images can be used for (visual) anomaly detection in evolving data streams and for sliding window based cluster assessment for time series data. The method is illustrated with four real datasets (three of them being smart city IoT data). The evaluation demonstrates the algorithms’ ability to successfully isolate anomalies and visualize changing cluster structure in the streaming data.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2019
Publisher: IEEE
Date: 08-2013
Publisher: IEEE
Date: 11-2014
Publisher: Elsevier BV
Date: 11-2019
Publisher: Springer US
Date: 2013
Publisher: IEEE
Date: 10-2007
Publisher: IEEE
Publisher: CRC Press
Date: 11-09-2017
Publisher: IEEE
Date: 08-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2019
Publisher: IEEE
Publisher: Wiley
Date: 03-05-2013
DOI: 10.1111/EPI.12207
Abstract: A definite diagnosis of psychogenic nonepileptic seizures (PNES) usually requires in-patient video-electroencephalography (EEG) monitoring. Previous research has shown that convulsive psychogenic nonepileptic seizures (PNES) demonstrate a characteristic pattern of rhythmic movement artifact on the EEG. Herein we sought to examine the potential for time-frequency mapping of data from a movement-recording device (accelerometer) worn on the wrist as a diagnostic tool to differentiate between convulsive epileptic seizures and PNES. Time-frequency mapping was performed on accelerometer traces obtained during 56 convulsive seizure-like events from 35 patients recorded during in-patient video-EEG monitoring. Twenty-six patients had PNES, eight had epileptic seizures, and one had both seizure types. The time-frequency maps were derived from fast Fourier transformations to determine the dominant frequency for sequential 2.56-s blocks for the course of each event. The coefficient of variation (CoV) of limb movement frequency for the PNES events was less than for the epileptic seizure events (median, 17.18% vs. 52.23% p < 0.001). A blinded review of the time-frequency maps by an epileptologist was accurate in differentiating between the event types, that is, 38 (92.7%) of 41 and 6 (75%) of 8 nonepileptic and epileptic seizures, respectively, were diagnosed correctly, with seven events classified as "nondiagnostic." Using a CoV cutoff score of 32% resulted in similar classification accuracy, with 42 (93%) of 45 PNES and 10 (91%) of 11 epileptic seizure events correctly diagnosed. Time-frequency analysis of data from a wristband movement monitor could be utilized as a diagnostic tool to differentiate between epileptic and nonepileptic convulsive seizure-like events.
Publisher: CRC Press
Date: 11-09-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Publisher: Public Library of Science (PLoS)
Date: 15-03-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2015
Publisher: IGI Global
Date: 2006
Publisher: CRC Press
Date: 04-12-2007
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2018
Publisher: IEEE
Date: 07-2019
Publisher: MDPI AG
Date: 18-06-2017
DOI: 10.3390/S17061427
Publisher: IEEE
Date: 08-2018
Publisher: IOP Publishing
Date: 08-10-2009
DOI: 10.1088/0967-3334/30/11/007
Abstract: The asymmetry in heart rate variability is a visibly obvious phenomenon in the Poincaré plot of normal sinus rhythm. It shows the unevenness in the distribution of points above and below the line of identity, which indicates instantaneous changes in the beat to beat heart rate. The major limitation of the existing asymmetry definition is that it considers only the instantaneous changes in the beat to beat heart rate rather than the pattern (increase/decrease). In this paper, a novel definition of asymmetry is proposed considering the geometry of a 2D Poincaré plot. Based on the proposed definition, traditional asymmetry indices--Guzik's index (GI), Porta's index (PI) and Ehlers' index (EI)--have been redefined. In order to compare the effectiveness of the new definition, all indices have been calculated for RR interval series of 54 subjects with normal sinus rhythm of 5 min and 30 min duration. The new definition resulted in a higher prevalence of normal subjects showing asymmetry in heart rate variability.
Publisher: IEEE
Date: 08-2015
Publisher: IEEE
Publisher: MECS Publisher
Date: 15-02-2012
Publisher: Springer US
Date: 1996
Publisher: Springer Science and Business Media LLC
Date: 2009
Publisher: IEEE
Date: 07-2006
Publisher: Elsevier BV
Date: 07-1993
Publisher: IEEE
Date: 08-2008
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2020
Publisher: IEEE
Date: 08-2013
Publisher: IEEE
Date: 06-1992
Publisher: IEEE
Date: 07-2019
Publisher: IEEE
Date: 06-1991
Publisher: IEEE
Date: 04-2015
Publisher: Frontiers Media SA
Date: 20-09-2017
Publisher: IEEE
Date: 06-2018
Publisher: Springer Berlin Heidelberg
Publisher: Elsevier BV
Date: 11-2010
DOI: 10.1016/J.JELECTROCARD.2010.09.001
Abstract: The Poincaré map is a visual technique to recognize the hidden correlation patterns of a time series signal. The standard descriptors of the Poincaré map are used to quantify the plot that measures the gross variability of the time series data. However, the problem lies in capturing temporal information of the plot quantitatively. In this article, we propose a new formulation for calculating the standard descriptors SD1 and SD2 from localized measures SD1^(w) and SD2^(w). To justify the importance of the temporal measure, SD1^(w), SD2^(w) are calculated for the 2 case studies (normal sinus rhythm [NSR] vs congestive heart failure and NSR vs arrhythmia) and are compared with the performance using the overall measures (SD1, SD2). Using overall SD1, receiver operating characteristic areas of 0.72 and 0.86 were obtained for NSR vs congestive heart failure and NSR vs arrhythmia, and using the proposed method resulted in 0.82 and 0.89. Because we have shown that the overall SD1 and SD2 are functions of the respective localized measures SD1^(w) and SD2^(w), we can conclude that use of localized measure provides equal or higher performance in pathology detection compared with the overall SD1 or SD2.
Publisher: IEEE
Date: 05-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2022
Publisher: IEEE
Publisher: Elsevier BV
Date: 07-2018
Publisher: Chapman and Hall/CRC
Date: 06-01-2017
Publisher: IEEE
Date: 07-2017
Publisher: IEEE
Date: 08-2013
Publisher: Springer Science and Business Media LLC
Date: 12-08-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2018
Publisher: Elsevier BV
Date: 06-1996
Publisher: IEEE
Date: 05-2017
Publisher: IEEE
Publisher: IEEE
Date: 2008
DOI: 10.1109/ICC.2008.22
Publisher: ACM
Date: 16-06-2014
Publisher: IEEE
Date: 06-2007
DOI: 10.1109/ICC.2007.52
Publisher: IEEE
Date: 12-2008
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2012
DOI: 10.1109/TMC.2011.88
Publisher: IEEE
Date: 07-2013
Publisher: IEEE
Publisher: Springer International Publishing
Date: 25-12-2015
Publisher: Elsevier BV
Date: 08-2018
Publisher: IEEE
Publisher: Springer International Publishing
Date: 24-08-2019
Publisher: Int. Soc. Inf. Fusion
Publisher: Springer Berlin Heidelberg
Date: 2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2021
Publisher: World Scientific Pub Co Pte Lt
Date: 12-2011
DOI: 10.1142/S1469026806002076
Abstract: Knowledge of the secondary structure and solvent accessibility of a protein plays a vital role in the prediction of fold, and eventually the tertiary structure of the protein. A challenging issue of predicting protein secondary structure from sequence alone is addressed. Support vector machines (SVM) are employed for the classification and the SVM outputs are converted to posterior probabilities for multi-class classification. The effect of using Chou–Fasman parameters and physico-chemical parameters along with evolutionary information in the form of position specific scoring matrix (PSSM) is analyzed. These proposed methods are tested on the RS126 and CB513 datasets. A new dataset is curated (PSS504) using recent release of CATH. On the CB513 dataset, sevenfold cross-validation accuracy of 77.9% was obtained using the proposed encoding method. A new method of calculating the reliability index based on the number of votes and the Support Vector Machine decision value is also proposed. A blind test on the EVA dataset gives an average Q 3 accuracy of 74.5% and ranks in top five protein structure prediction methods. Supplementary material including datasets are available on .
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2021
Publisher: IEEE
Date: 06-0066
Publisher: MDPI AG
Date: 25-08-2023
DOI: 10.3390/BIOENGINEERING10091007
Abstract: The measurement and analysis of fetal heart rate (FHR) and uterine contraction (UC) patterns, known as cardiotocography (CTG), is a key technology for detecting fetal compromise during labour. This technology is commonly used by clinicians to make decisions on the mode of delivery to minimise adverse outcomes. A range of computerised CTG analysis techniques have been proposed to overcome the limitations of manual clinician interpretation. While these automated techniques can potentially improve patient outcomes, their adoption into clinical practice remains limited. This review provides an overview of current FHR and UC monitoring technologies, public and private CTG datasets, pre-processing steps, and classification algorithms used in automated approaches for fetal compromise detection. It aims to highlight challenges inhibiting the translation of automated CTG analysis methods from research to clinical application and provide recommendations to overcome them.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2019
Publisher: CRC Press
Date: 04-12-2009
Publisher: S. Karger AG
Date: 2014
DOI: 10.1159/000360808
Abstract: b i Background: /i /b Clinical deterioration in the acute stage of ischemic stroke powerfully predicts outcome and may serve as a marker for urgent intervention. However, accurate monitoring of acute stroke patients is h ered by the lack of validated continuous monitoring devices. We sought to assess the use of wireless accelerometry in this setting, hypothesizing that stroke patients would have a greater difference in movement between upper limbs than controls and that the magnitude of correlation between upper limb movements would be negatively associated with the National Institutes of Health Stroke Scale (NIHSS) score. b i Methods: /i /b In this pilot study, 20 patients with acute ischemic stroke and unilateral upper limb weakness and 10 controls were recruited from a comprehensive stroke centre. All subjects were fitted with two 3-axis accelerometers and underwent 24 h of continuous accelerometry recording of upper limb movements and repeat NIHSS assessments. The intra-class correlation coefficient (ICC), assessing the similarity (or otherwise) of spontaneous movements in each arm was calculated. The association between NIHSS (total and motor subset scores) and the magnitude of ICC was estimated by Spearman's rank correlation, receiver-operating characteristic curve analysis was performed and the optimal diagnostic threshold value of ICC was calculated. b i Results: /i /b The magnitude of the ICC was significantly associated with the baseline NIHSS score (p = 0.02) and non-significantly associated with the baseline NIHSS motor score (p = 0.08). At the optimal diagnostic threshold of ICC magnitude = 0.7, wireless accelerometry distinguished patients from controls with a sensitivity of 0.95, a specificity of 0.6 and a diagnostic odds ratio of 28.5. b i Conclusions: /i /b The wireless accelerometry system successfully detects a motor deficit in the setting of acute ischemic stroke, accurately differentiating patients from controls, and correlates well with the baseline NIHSS score. Its use is feasible in the acute stroke setting. Overall, it shows promise as a diagnostic tool to continuously monitor acute stroke patients but requires validation in a larger trial.
Publisher: CRC Press
Date: 04-12-2009
Publisher: IOP Publishing
Date: 04-2021
Abstract: Objective. The clinical assessment of upper limb hemiparesis in acute stroke involves repeated manual examination of hand movements during instructed tasks. This process is labour-intensive and prone to human error as well as being strenuous for the patient. Wearable motion sensors can automate the process by measuring characteristics of hand activity. Existing work in this direction either uses multiple sensors or complex instructed movements, or analyzes only the quantity of upper limb motion. These methods are obtrusive and strenuous for acute stroke patients and are also sensitive to noise. In this work, we propose to use only two wrist-worn accelerometer sensors to study the quality of completely spontaneous upper limb motion and investigate correlation with clinical scores for acute stroke care. Approach. The velocity time series estimated from acquired acceleration data during spontaneous motion is decomposed into smaller movement elements. Measures of density, duration and smoothness of these component elements are extracted and their disparity is studied across the two hands. Main results. Spontaneous upper limb motion in acute stroke can be decomposed into movement elements that resemble point-to-point reaching tasks. These elements are smoother and sparser in the normal hand than in the hemiparetic hand, and the amount of smoothness correlates with hemiparetic severity. Features characterizing the disparity of these movement elements between the two hands show statistical significance in differentiating mild-to-moderate and severe hemiparesis. Using data from 67 acute stroke patients, the proposed method can classify the two levels of hemiparetic severity with 85% accuracy. Additionally, compared to activity-based features, the proposed method is robust to the presence of noise in acquired data. Significance. This work demonstrates that the quality of upper limb motion can characterize and identify hemiparesis in stroke survivors. This is clinically significant towards the continuous automated assessment of hemiparesis in acute stroke using minimally intrusive wearable sensors.
Publisher: IEEE
Date: 07-2019
Publisher: CRC Press
Date: 04-12-2009
Publisher: Springer International Publishing
Date: 25-12-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2019
Publisher: IEEE
Date: 05-2010
Publisher: Elsevier BV
Date: 03-1992
Publisher: IEEE
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2019
Publisher: IEEE
Date: 03-2016
Publisher: MDPI AG
Date: 02-03-2015
DOI: 10.3390/E17031042
Publisher: Elsevier BV
Date: 11-2009
Publisher: American Physical Society (APS)
Date: 15-07-2019
Publisher: IEEE
Date: 1991
Publisher: IEEE
Date: 12-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 09-2009
Publisher: IEEE
Date: 10-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
Publisher: IEEE
Publisher: Elsevier BV
Date: 2014
Publisher: Association for Computing Machinery (ACM)
Date: 15-12-2023
DOI: 10.1145/3544836
Abstract: Fog computing, as a distributed paradigm, offers cloud-like services at the edge of the network with low latency and high-access bandwidth to support a erse range of IoT application scenarios. To fully utilize the potential of this computing paradigm, scalable, adaptive, and accurate scheduling mechanisms and algorithms are required to efficiently capture the dynamics and requirements of users, IoT applications, environmental properties, and optimization targets. This article presents a taxonomy of recent literature on scheduling IoT applications in Fog computing. Based on our new classification schemes, current works in the literature are analyzed, research gaps of each category are identified, and respective future directions are described.
Publisher: Association for Computing Machinery (ACM)
Date: 23-04-2015
DOI: 10.1145/2736697
Abstract: Wireless sensor networks are often deployed in large numbers, over a large geographical region, in order to monitor the phenomena of interest. Sensors used in the sensor networks often suffer from random or systematic errors such as drift and bias. Even if they are calibrated at the time of deployment, they tend to drift as time progresses. Consequently, the progressive manual calibration of such a large-scale sensor network becomes impossible in practice. In this article, we address this challenge by proposing a collaborative framework to automatically detect and correct the drift in order to keep the data collected from these networks reliable. We propose a novel scheme that uses geospatial estimation-based interpolation techniques on measurements from neighboring sensors to collaboratively predict the value of phenomenon being observed. The predicted values are then used iteratively to correct the sensor drift by means of a Kalman filter. Our scheme can be implemented in a centralized as well as distributed manner to detect and correct the drift generated in the sensors. For centralized implementation of our scheme, we compare several kriging- and nonkriging-based geospatial estimation techniques in combination with the Kalman filter, and show the superiority of the kriging-based methods in detecting and correcting the drift. To demonstrate the applicability of our distributed approach on a real world application scenario, we implement our algorithm on a network consisting of Wireless Sensor Network (WSN) hardware. We further evaluate single as well as multiple drifting sensor scenarios to show the effectiveness of our algorithm for detecting and correcting drift. Further, we address the issue of high power usage for data transmission among neighboring nodes leading to low network lifetime for the distributed approach by proposing two power saving schemes. Moreover, we compare our algorithm with a blind calibration scheme in the literature and demonstrate its superiority in detecting both linear and nonlinear drifts.
Publisher: IEEE
Publisher: IEEE
Date: 10-2018
Publisher: IEEE
Publisher: Springer Science and Business Media LLC
Date: 22-12-2012
DOI: 10.1007/S10877-011-9323-Z
Abstract: Obstructive sleep apnea (OSA) causes a pause in airflow with reduced breathing effort. In contrast, central sleep apnea (CSA) event is not accompanied with breathing effort. The aim of this study is to differentiate CSA and OSA events using wavelet packet analysis and support vector machines of ECG signals over 5 s period. Eight level wavelet packet analysis was performed on each 5 s clip using Daubechies (DB3) mother wavelet and for comparison discrete wavelet analysis was performed using Symlet (SYM3) wavelets. The choice of wavelet basis function was based on a grid search using Daubechies, Symlet and biorthogonal wavelets with decomposition levels varying between 2 and 5. Support vector machine is used for two-class classification. Out of 29 overnight polysomnographic studies, 23 of them were used in the training phase and 6 patients were used for independent testing. The proposed algorithm is shown to perform better in classifying CSA and OSA with wavelet packet features (accuracy-91%, sensitivity-88.14% and specificity-91.11%) than with the traditional wavelet decomposition based features (accuracy-83.79%, sensitivity-89.18% and specificity-83.59%). The independent test resulted in overall classification accuracy, sensitivity and specificity of 91.08, 91.02 and 91.09% respectively using wavelet packet analysis. The classification result indicates the possibility of non-invasively classifying CSA and OSA events based on shorter segments of ECG signals.
Publisher: IEEE
Date: 1997
Publisher: IEEE
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 07-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Wiley
Date: 03-12-2010
DOI: 10.1002/SEC.256
Publisher: Elsevier BV
Date: 09-2013
Publisher: IEEE
Date: 07-2017
Publisher: IOP Publishing
Date: 28-02-2022
Abstract: Objective. Fetal arrhythmias are a life-threatening disorder occurring in up to 2% of pregnancies. If identified, many fetal arrhythmias can be effectively treated using anti-arrhythmic therapies. In this paper, we present a novel method of detecting fetal arrhythmias in short length non-invasive fetal electrocardiography (NI-FECG) recordings. Approach. Our method consists of extracting a fetal heart rate time series from each NI-FECG recording and computing an entropy profile using a data-driven range of the entropy tolerance parameter r . To validate our approach, we apply our entropy profiling method to a large clinical data set of 318 NI-FECG recordings. Main Results. We demonstrate that our method ( TotalS En ) provides strong performance for classifying arrhythmic fetuses (AUC of 0.83) and outperforms entropy measures such as S En (AUC of 0.68) and FuzzyEn (AUC of 0.72). We also find that NI-FECG recordings incorrectly classified using the investigated entropy measures have significantly lower signal quality, and that excluding recordings of low signal quality (13.5% of recordings) increases the classification performance of TotalS En (AUC of 0.90). Significance. The superior performance of our approach enables automated detection of fetal arrhythmias and warrants further investigation in a prospective clinical trial.
Publisher: IEEE
Publisher: IEEE
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2014
Publisher: IEEE
Date: 1995
Publisher: IEEE
Date: 12-2017
Publisher: IEEE
Date: 07-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2021
Publisher: ACM
Date: 06-11-2017
Publisher: IEEE
Date: 10-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2020
Publisher: Frontiers Media SA
Date: 17-05-2017
Publisher: CRC Press
Date: 15-09-2017
Publisher: IEEE
Publisher: IEEE
Date: 12-2008
Publisher: Springer Science and Business Media LLC
Date: 10-12-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2023
Publisher: Springer US
Date: 2013
Publisher: IEEE
Date: 04-2016
Publisher: IEEE
Date: 02-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2016
Publisher: Elsevier BV
Date: 2011
Publisher: IEEE
Date: 11-2015
Publisher: IEEE
Date: 04-2017
Publisher: IEEE
Publisher: IEEE
Publisher: Springer Science and Business Media LLC
Date: 16-04-2013
Abstract: Stroke is one of the major causes of morbidity and mortality. Its recovery and treatment depends on close clinical monitoring by a clinician especially during the first few hours after the onset of stroke. Patients who do not exhibit early motor recovery post thrombolysis may benefit from more aggressive treatment. A novel approach for monitoring stroke during the first few hours after the onset of stroke using a wireless accelerometer based motor activity monitoring system is developed. It monitors the motor activity by measuring the acceleration of the arms in three axes. In the presented proof of concept study, the measured acceleration data is transferred wirelessly using iMote2 platform to the base station that is equipped with an online algorithm capable of calculating an index equivalent to the National Institute of Health Stroke Score (NIHSS) motor index. The system is developed by collecting data from 15 patients. We have successfully demonstrated an end-to-end stroke monitoring system reporting an accuracy of calculating stroke index of more than 80%, highest Cohen’s overall agreement of 0.91 (with excellent κ coefficient of 0.76). A wireless accelerometer based ‘hot stroke’ monitoring system is developed to monitor the motor recovery in acute-stroke patients. It has been shown to monitor stroke patients continuously, which has not been possible so far with high reliability.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2018
Publisher: IEEE
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
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DOI: 10.1109/IAS.2009.215
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
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Publisher: Elsevier BV
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Publisher: IEEE Comput. Soc. Press
Publisher: CRC Press
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