807 results on '"REAL-TIME ANALYSIS"'
Search Results
2. A novel real-time calculus for arbitrary job patterns and deadlines
- Author
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Fattohi, Iwan Feras, Prehofer, Christian, and Slomka, Frank
- Published
- 2024
- Full Text
- View/download PDF
3. An ECG Processor with Low-Power Arrhythmia Detection for Wearable Devices
- Author
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Kumar, Mohit, Varshney, Shikhar, Gupta, Lalita, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Tan, Kay Chen, Series Editor, Shrivastava, Vivek, editor, Bansal, Jagdish Chand, editor, and Panigrahi, B. K., editor
- Published
- 2025
- Full Text
- View/download PDF
4. Combining Real‐Time Neuroimaging With Machine Learning to Study Attention to Familiar Faces During Infancy: A Proof of Principle Study.
- Author
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Throm, Elena, Gui, Anna, Haartsen, Rianne, da Costa, Pedro F., Leech, Robert, Mason, Luke, and Jones, Emily J. H.
- Subjects
- *
OPTIMIZATION algorithms , *CAREGIVERS , *MACHINE learning , *SOCIAL development , *PROOF of concept - Abstract
Looking at caregivers' faces is important for early social development, and there is a concomitant increase in neural correlates of attention to familiar versus novel faces in the first 6 months. However, by 12 months of age brain responses may not differentiate between familiar and unfamiliar faces. Traditional group‐based analyses do not examine whether these 'null' findings stem from a true lack of preference within individual infants, or whether groups of infants show individually strong but heterogeneous preferences for familiar versus unfamiliar faces. In a preregistered proof‐of‐principle study, we applied Neuroadaptive Bayesian Optimisation (NBO) to test how individual infants' neural responses vary across faces differing in familiarity. Sixty‐one 5–12‐month‐olds viewed faces resulting from gradually morphing a familiar (primary caregiver) into an unfamiliar face. Electroencephalography (EEG) data from fronto‐central channels were analysed in real‐time. After the presentation of each face, the Negative central (Nc) event‐related potential (ERP) amplitude was calculated. A Bayesian Optimisation algorithm iteratively selected the next stimulus until it identified the stimulus eliciting the strongest Nc for that infant. Attrition (15%) was lower than in traditional studies (22%). Although there was no group‐level Nc‐difference between familiar versus unfamiliar faces, an optimum was predicted in 85% of the children, indicating individual‐level attentional preferences. Traditional analyses based on infants' predicted optimum confirmed NBO can identify subgroups based on brain activation. Optima were not related to age and social behaviour. NBO suggests the lack of overall familiar/unfamiliar‐face attentional preference in middle infancy is explained by heterogeneous preferences, rather than a lack of preference within individual infants. [ABSTRACT FROM AUTHOR]
- Published
- 2025
- Full Text
- View/download PDF
5. SARTAB, a scalable system for automated real-time behavior detection based on animal tracking and Region Of Interest analysis: validation on fish courtship behavior.
- Author
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Lancaster, Tucker J., Leatherbury, Kathryn N., Shilova, Kseniia, Streelman, Jeffrey T., and McGrath, Patrick T.
- Subjects
ANIMAL tracks ,CICHLIDS ,ANIMAL courtship ,NEUROPLASTICITY ,BEHAVIORAL assessment - Abstract
Methods from Machine Learning (ML) and Computer Vision (CV) have proven powerful tools for quickly and accurately analyzing behavioral recordings. The computational complexity of these techniques, however, often precludes applications that require real-time analysis: for example, experiments where a stimulus must be applied in response to a particular behavior or samples must be collected soon after the behavior occurs. Here, we describe SARTAB (Scalable Automated Real-Time Analysis of Behavior), a system that achieves automated real-time behavior detection by continuously monitoring animal positions relative to behaviorally relevant Regions Of Interest (ROIs). We then show how we used this system to detect infrequent courtship behaviors in Pseudotropheus demasoni (a species of Lake Malawi African cichlid fish) to collect neural tissue samples from actively behaving individuals for multiomic profiling at single nucleus resolution. Within this experimental context, we achieve high ROI and animal detection accuracies (mAP@ [.5 :.95] of 0.969 and 0.718, respectively) and 100% classification accuracy on a set of 32 manually selected behavioral clips. SARTAB is unique in that all analysis runs on low-cost, edge-deployed hardware, making it a highly scalable and energy-efficient solution for real-time experimental feedback. Although our solution was developed specifically to study cichlid courtship behavior, the intrinsic flexibility of neural network analysis ensures that our approach can be adapted to novel species, behaviors, and environments. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Real-Time Analysis for Enhancement of Photovoltaic Panel Efficiency and Quality.
- Author
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Zine, Bachir, Labiod, Chouaib, Srairi, Kamel, Benmouna, Amel, Becherif, Mohamed, Khechekhouche, Abderrahmane, Ravelo, Blaise, and Naoui, Mohamed
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PHOTOVOLTAIC cells ,ELECTRIC power distribution grids ,ALGORITHMS ,OPEN-circuit voltage ,REAL-time computing - Abstract
This study addressed the quality assessment of photovoltaic (PV) panels by analyzing their efficiency and electrical power under varying environmental conditions. A sophisticated algorithm was developed to extract and analyze PV panel voltage and current data in a complex manner, allowing the identification of key parameters such as open circuit voltage (Voc), short circuit current (Isc), and peak electrical power. These parameters were compared to the input power to accurately determine the panel efficiency. The novelty of this approach lies in its real-time implementation using a DC/DC (buck-boost) converter equipped with precise voltage and current sensors and running on a TMS320f379D board, linking theoretical knowledge with practical results. Experimental results demonstrated that temperature and irradiation significantly influence PV performance. With a 10°C increase in temperature, it resulted in a 5-10% decrease in output power, while a 100 W/m² increase in irradiation resulted in a 10-15% increase in output power. The study highlights the importance of considering both temperature and irradiation variations to optimize PV system design and operation, providing a robust method to assess PV panel quality in real-time. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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7. A real-time predicting online tool for detection of people's emotions from Arabic tweets based on big data platforms.
- Author
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Abdelhady, Naglaa, Elsemman, Ibrahim E., and Soliman, Taysir Hassan A.
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AFFECTIVE forecasting (Psychology) ,CONVOLUTIONAL neural networks ,TCP/IP ,WEB-based user interfaces ,SENTIMENT analysis ,BIG data - Abstract
Emotion prediction is a subset of sentiment analysis that aims to extract emotions from text, speech, or images. The researchers posit that emotions determine human behavior, making the development of a method to recognize emotions automatically crucial for use during global crises, such as the COVID-19 pandemic. In this paper, a real-time system is developed that identifies and predicts emotions conveyed by users in Arabic tweets regarding COVID-19 into standard six emotions based on the big data platform, Apache Spark. The system consists of two main stages: (1) Developing an offline model and (2) Online emotion prediction pipeline. For the first stage, two different approaches: The deep Learning (DL) approach and the Transfer Learning-based (TL) approach to find the optimal classifier for identifying and predicting emotion. For DL, three classifiers are applied: Convolutional Neural Network (CNN), Gated Recurrent Unit (GRU), and Bidirectional GRU (BiGRU). For TL, five models are applied: AraBERT, ArabicBERT, ARBERT, MARBERT, and QARiB. For the second stage, create a Transmission Control Protocol (TCP) socket between Twitter's API and Spark used to receive streaming tweets and Apache Spark to predict the label of tweets in real-time. The experimental results show that the QARiB model achieved the highest Jaccard accuracy (65.73%), multi-accuracy (78.71%), precision-micro (78.71%), recall-micro (78.71%), f-micro (78.71%), and f-macro (78.55%). The system is available as a web-based application that aims to provide a real-time visualization of people's emotions during a crisis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. Structural Health Monitoring and Failure Analysis of Large-Scale Hydro-Steel Structures, Based on Multi-Sensor Information Fusion.
- Author
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Li, Helin, Zhao, Huadong, Shen, Yonghao, Zheng, Shufeng, and Zhang, Rui
- Subjects
WATER management ,FINITE element method ,MULTISENSOR data fusion ,HYDRAULIC engineering ,WATER currents ,STRUCTURAL health monitoring - Abstract
Large-scale hydro-steel structures (LS-HSSs) are vital to hydraulic engineering, supporting critical functions such as water resource management, flood control, power generation, and navigation. However, due to prolonged exposure to severe environmental conditions and complex operational loads, these structures progressively degrade, posing increased risks over time. The absence of effective structural health monitoring (SHM) systems exacerbates these risks, as undetected damage and wear can compromise safety. This paper presents an advanced SHM framework designed to enhance the real-time monitoring and safety evaluation of LS-HSSs. The framework integrates the finite element method (FEM), multi-sensor data fusion, and Internet of Things (IoT) technologies into a closed-loop system for real-time perception, analysis, decision-making, and optimization. The system was deployed and validated at the Luhun Reservoir spillway, where it demonstrated stable and reliable performance for real-time anomaly detection and decision-making. Monitoring results over time were consistent, with stress values remaining below allowable thresholds and meeting safety standards. Specifically, stress monitoring during radial gate operations (with a current water level of 1.4 m) indicated that the dynamic stress values induced by flow vibrations at various points increased by approximately 2 MPa, with no significant impact loads. Moreover, the vibration amplitude during gate operation was below 0.03 mm, confirming the absence of critical structural damage and deformation. These results underscore the SHM system's capacity to enhance operational safety and maintenance efficiency, highlighting its potential for broader application across water conservancy infrastructure. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. Recognition and statistical method of cows rumination and eating behaviors based on Tensorflow.js
- Author
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Yu Zhang, Xiangting Li, Zhiqing Yang, Shaopeng Hu, Xiao Fu, and Weizheng Shen
- Subjects
Recognition of cow rumination ,Edge computing ,Tensorflow.js ,SSD MobileNet V2 ,Real-time analysis ,Agriculture (General) ,S1-972 ,Information technology ,T58.5-58.64 - Abstract
Information about dairy cow ruminating is closely associated with the health status of dairy cows. Therefore, it is of great significance to recognize and make statistics of dairy cows’ ruminating and feeding behavior. Concerning conventional recognition methods which are dependent on contact type devices, they have some defects of poor instantaneity and strong stress responses. As for recognition based on machine vision, it needs to transmit masses of data and raises high requirements for the cloud server and network performance. According to principles of edge computing, the model is deployed via Tensorflow.js in an edge device in the present study, constructing a recognition and statistical system for ruminating and feeding behavior of dairy cows. Through the application programming interface (API) of the browser, an edge device is able to invoke a camera and acquire dairy cow images. Then, the images can be inputted in the SSD MobileNet V2 model, which is followed by inference based on browser hashrate. Moreover, the edge device merely uploads recognition results to the cloud server for statistics, which features high instantaneity and compatibility. In terms of recognizing ruminating and feeding behavior of dairy cows, the proposed system has a precision ratio of 96.50%, a recall rate of 91.77%, an F1-score of 94.08%, specificity of 91.36%, and accuracy of 91.66%. This suggests that the proposed method is effective in recognizing dairy cow behavior.
- Published
- 2024
- Full Text
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10. A real-time predicting online tool for detection of people’s emotions from Arabic tweets based on big data platforms
- Author
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Naglaa Abdelhady, Ibrahim E. Elsemman, and Taysir Hassan A. Soliman
- Subjects
Arabic emotion detection ,Web-based Tool ,Real-time analysis ,Streaming tweets ,Transfer learning ,Big data ,Computer engineering. Computer hardware ,TK7885-7895 ,Information technology ,T58.5-58.64 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Abstract Emotion prediction is a subset of sentiment analysis that aims to extract emotions from text, speech, or images. The researchers posit that emotions determine human behavior, making the development of a method to recognize emotions automatically crucial for use during global crises, such as the COVID-19 pandemic. In this paper, a real-time system is developed that identifies and predicts emotions conveyed by users in Arabic tweets regarding COVID-19 into standard six emotions based on the big data platform, Apache Spark. The system consists of two main stages: (1) Developing an offline model and (2) Online emotion prediction pipeline. For the first stage, two different approaches: The deep Learning (DL) approach and the Transfer Learning-based (TL) approach to find the optimal classifier for identifying and predicting emotion. For DL, three classifiers are applied: Convolutional Neural Network (CNN), Gated Recurrent Unit (GRU), and Bidirectional GRU (BiGRU). For TL, five models are applied: AraBERT, ArabicBERT, ARBERT, MARBERT, and QARiB. For the second stage, create a Transmission Control Protocol (TCP) socket between Twitter’s API and Spark used to receive streaming tweets and Apache Spark to predict the label of tweets in real-time. The experimental results show that the QARiB model achieved the highest Jaccard accuracy (65.73%), multi-accuracy (78.71%), precision-micro (78.71%), recall-micro (78.71%), f-micro (78.71%), and f-macro (78.55%). The system is available as a web-based application that aims to provide a real-time visualization of people’s emotions during a crisis.
- Published
- 2024
- Full Text
- View/download PDF
11. Investigating the Quantification Capabilities of a Nanopore-Based Sequencing Platform for Food Safety Application via External Standards of Lambda DNA and Lambda Spiked Beef.
- Author
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Harper, Sky, Counihan, Katrina L., Kanrar, Siddhartha, Paoli, George C., Tilman, Shannon, and Gehring, Andrew G.
- Subjects
NUCLEIC acid hybridization ,CATTLE ,TECHNOLOGICAL innovations ,FOOD pathogens ,BACTERIAL DNA - Abstract
Six hundred million cases of disease and roughly 420,000 deaths occur globally each year due to foodborne pathogens. Current methods to screen and identify pathogens in swine, poultry, and cattle products include immuno-based techniques (e.g., immunoassay integrated biosensors), molecular methods (e.g., DNA hybridization and PCR assays), and traditional culturing. These methods are often used in tandem to screen, quantify, and characterize samples, prolonging real-time comprehensive analysis. Next-generation sequencing (NGS) is a relatively new technology that combines DNA-sequencing chemistry and bioinformatics to generate and analyze large amounts of short- or long-read DNA sequences and whole genomes. The goal of this project was to evaluate the quantitative capabilities of the real-time NGS Oxford Nanopore Technologies' MinION sequencer through a shotgun-based sequencing approach. This investigation explored the correlation between known amounts of the analyte (lambda DNA as a pathogenic bacterial surrogate) with data output, in both the presence and absence of a background matrix (Bos taurus DNA). A positive linear correlation was observed between the concentration of analyte and the amount of data produced, number of bases sequenced, and number of reads generated in both the presence and absence of a background matrix. In the presence of bovine DNA, the sequenced data were successfully mapped to the NCBI lambda reference genome. Furthermore, the workflow from pre-extracted DNA to target identification took less than 3 h, demonstrating the potential of long-read sequencing in food safety as a rapid method for screening, identification, and quantification. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
12. Enhanced Credit Card Fraud Detection Using Deep Learning Techniques.
- Author
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Obaid, Ola Imran and Al-Sultan, Ali Yakoob
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MACHINE learning ,CREDIT card fraud ,FRAUD investigation ,FINANCIAL engineering ,DEEP learning ,CREDIT cards - Abstract
Credit card fraud is a huge challenge in the financial sector, causing huge losses every year. The problem is exacerbated by increased marketing and sophisticated fraudulent activities. This study addresses the important issue of accurate real-time detection of fraudulent transactions to minimize financial losses and enhance transactional security. The main objective of this study is to develop a comprehensive fraud detection algorithm using deep learning techniques, specially designed to address the complexity and volume of modern credit card transactions. Key contributions of this research include the presentation of a new deep learning algorithm optimized for credit card fraud detection, the integration of feature engineering techniques to improve the performance of the model, and a potential scalable solution analysis in real-time Significant improvement in proven rates. The results show that the proposed deep learning-based model achieves higher accuracy and lower false positive rate, giving financial institutions a significant advantage in protecting against fraudulent activities about the character. This study highlights the power of deep learning in reforming fraud detection systems, and lays the foundation for future developments in this important area. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
13. A survey on hybrid transactional and analytical processing.
- Author
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Song, Haoze, Zhou, Wenchao, Cui, Heming, Peng, Xiang, and Li, Feifei
- Abstract
To provide applications with the ability to analyze fresh data and eliminate the time-consuming ETL workflow, hybrid transactional and analytical (HTAP) systems have been developed to serve online transaction processing and online analytical processing workloads in a single system. In recent years, HTAP systems have attracted considerable interest from both academia and industry. Several new architectures and technologies have been proposed. This paper provides a comprehensive overview of these HTAP systems. We review recently published papers and technical reports in this field and broadly classify existing HTAP systems into two categories based on their data formats: monolithic and hybrid HTAP. We further classify hybrid HTAP into four sub-categories based on their storage architecture: row-oriented, column-oriented, separated, and hybrid. Based on such a taxonomy, we outline each stream's design challenges and performance issues (e.g., the contradictory format demand for monolithic HTAP). We then discuss potential solutions and their trade-offs by reviewing noteworthy research findings. Finally, we summarize emerging HTAP applications, benchmarks, future trends, and open problems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
14. Real‐Time Product Detection during CO2 Electroreduction on SCILL‐Modified Cu Catalysts.
- Author
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Parada, Walter A., Mayrhofer, Karl J. J., and Nikolaienko, Pavlo
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LIQUID analysis ,COPPER ,IONIC crystals ,IONIC liquids ,ELECTROLYTIC reduction - Abstract
Modifying the chemical environment of active surfaces with ionic liquids (IL) is an emerging strategy for tailoring novel electrocatalytic systems, including carbon dioxide reduction (CO2RR). Although copper (Cu) catalysts have recently gained more attention in this field, their modification with ILs is yet to be investigated. This work tested a range of common hydrophobic ILs impregnated into carbon‐supported Cu catalysts, following the "solid catalyst with ionic liquid layer" (SCILL) approach. The latter was used to showcase the applicability of real‐time product detection for CO2RR employing electrochemical mass spectrometry. The observed patterns of C1 to C3 product selectivity offered valuable insights into the intricate reaction mechanism. In addition, increasing the size of the IL cation showed an opposite and significant effect on the reaction selectivity. The obtained qualitative results were partially compared with conventional long‐term experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
15. SARTAB, a scalable system for automated real-time behavior detection based on animal tracking and Region Of Interest analysis: validation on fish courtship behavior
- Author
-
Tucker J. Lancaster, Kathryn N. Leatherbury, Kseniia Shilova, Jeffrey T. Streelman, and Patrick T. McGrath
- Subjects
behavior ,computational ethology ,cichlid fish ,Computer Vision ,Machine Learning ,real-time analysis ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Methods from Machine Learning (ML) and Computer Vision (CV) have proven powerful tools for quickly and accurately analyzing behavioral recordings. The computational complexity of these techniques, however, often precludes applications that require real-time analysis: for example, experiments where a stimulus must be applied in response to a particular behavior or samples must be collected soon after the behavior occurs. Here, we describe SARTAB (Scalable Automated Real-Time Analysis of Behavior), a system that achieves automated real-time behavior detection by continuously monitoring animal positions relative to behaviorally relevant Regions Of Interest (ROIs). We then show how we used this system to detect infrequent courtship behaviors in Pseudotropheus demasoni (a species of Lake Malawi African cichlid fish) to collect neural tissue samples from actively behaving individuals for multiomic profiling at single nucleus resolution. Within this experimental context, we achieve high ROI and animal detection accuracies (mAP@[.5 : .95] of 0.969 and 0.718, respectively) and 100% classification accuracy on a set of 32 manually selected behavioral clips. SARTAB is unique in that all analysis runs on low-cost, edge-deployed hardware, making it a highly scalable and energy-efficient solution for real-time experimental feedback. Although our solution was developed specifically to study cichlid courtship behavior, the intrinsic flexibility of neural network analysis ensures that our approach can be adapted to novel species, behaviors, and environments.
- Published
- 2024
- Full Text
- View/download PDF
16. Nanopore sensing and beyond: Electrochemical systems for optically-coupled single-entity studies, stimulus-responsive gating applications, and point-of-care sensors
- Author
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Julius Reitemeier, Jarek Metro, and Kaiyu X. Fu
- Subjects
Nanopore sensing ,Nanoelectrochemistry ,Aptamer-based biosensor ,Single-entity detection ,Machine learning algorithm ,Real-time analysis ,Instruments and machines ,QA71-90 - Abstract
Nanopores play essential roles in biological processes, such as ion channels and pumps in cellular membranes, and in technological applications such as DNA sequencing. Advancements in nanofabrication techniques have enabled the routine integration of nanopores into solid-state devices, resulting in a plethora of analytical applications. This review explores recent developments in nanopore-enabled electrochemical systems, which have transcended traditional resistive pulse sensing to offer novel capabilities in single-entity studies, stimulus-responsive gating, and point-of-care diagnostics. We highlight recent studies on the design and utility of nanopore electrode arrays, which serve as nanocontainers capable of isolating and analyzing single entities, and extend the discussion to hierarchically organized, stimulus-responsive systems that regulate species transport across nanopores, enriching analytes for ultrasensitive detection. In addition, we review the utilization of probe-assisted nanopore sensing, demonstrating its efficacy in selectively binding and detecting target molecules and ions. Finally, we outline future directions for nanopore-based systems to enhance robustness, achieve high-throughput analysis, and incorporate artificial intelligence for materials design and data analysis, promising transformative impacts on diagnostics and biological research.
- Published
- 2024
- Full Text
- View/download PDF
17. Role of Artificial Intelligence (AI) in the Promotion of Sports
- Author
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Bajwa, Sewa Singh
- Published
- 2024
- Full Text
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18. An IoT-Enabled Smart Net-Metering System for Real-Time Analysis of Renewable Energy Generation in MATLAB/Simulink
- Author
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Pathare, Akshay Ashok, Singh, Ravindra Pratap, and Sethi, Dinesh
- Published
- 2024
- Full Text
- View/download PDF
19. Lightweight Convolutional Network with Integrated Attention Mechanism for Missing Bolt Detection in Railways
- Author
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Mujadded Al Rabbani Alif and Muhammad Hussain
- Subjects
lightweight convolutional neural network (CNN) ,integrated attention mechanism ,missing bolt detection ,railway infrastructure safety ,real-time analysis ,safety inspection automation ,Electronic computers. Computer science ,QA75.5-76.95 ,Applied mathematics. Quantitative methods ,T57-57.97 - Abstract
Railway infrastructure safety is a paramount concern, with bolt integrity being a critical component. In the realm of railway maintenance, the detection of missing bolts is a vital task that ensures the stability and safety of tracks. Traditionally, this task has been approached through manual inspections or conventional automated methods, which are often time-consuming, costly, and prone to human error. Addressing these challenges, this paper presents a state-of-the-art solution with the development of a lightweight convolutional neural network (CNN) featuring an integrated attention mechanism. This novel model is engineered to be computationally efficient while maintaining high accuracy, making it particularly suitable for real-time analysis in resource-constrained environments commonly found in railway inspections. The proposed CNN utilises a distinctive architecture that synergises the speed of lightweight networks with the precision of attention-based mechanisms. By integrating an attention mechanism, the network selectively concentrates on regions of interest within the image, effectively enhancing the model’s capability to identify missing bolts with remarkable accuracy. Comprehensive testing showcases a remarkable 96.43% accuracy and an impressive 96 F1-score, substantially outperforming existing deep learning frameworks in the context of missing bolt detection. Key contributions of this research include the model’s innovative attention-integrated approach, which significantly reduces the model complexity without compromising detection performance. Additionally, the model offers scalability and adaptability to various railway settings, proving its efficacy not just in controlled environments but also in diverse real-world scenarios. Extensive experiments, rigorous evaluations, and real-time deployment results collectively underscore the transformative potential of the presented CNN model in advancing the domain of railway safety maintenance.
- Published
- 2024
- Full Text
- View/download PDF
20. Adapting user experience with reinforcement learning: Personalizing interfaces based on user behavior analysis in real-time
- Author
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Abdulrahman Khamaj and Abdulelah M. Ali
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User Experience Personalization ,Reinforcement Learning ,Real-time Analysis ,Interface Adaptation ,Dynamic User Interfaces ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Developing a dynamic, personalized user interface that changes in real-time in response to user behavior is the goal. This paper supplies a modern method to beautify consumers enjoy using Reinforcement Learning (RL) and a Deep Q Network (DQN). Through support examination, the task objectives are to upgrade buyer connections and increment commitment, delight, and undertaking of consummation rates. Users who utilize traditional user interfaces get a common experience because they're impersonal and unflexible. The potential for higher engagement and happiness levels is limited in the absence of real-time changes based on individual preferences and behaviors. To overcome this problem, the study suggests a cunning technique for a getting-to-comprehend layout that may constantly analyze and modify patron communications. This evaluation is new as it provides a blended RL and DQN framework that modifies person interfaces grade by grade. Dissimilar to conventional methodologies, the proposed form adjusts the utilization of well-known, over-the-top prize moves with the development of the most recent ones through an investigation double-dealing system. EventType, contentId, personId, sensorId, and timestamp are instances of timestamped insights handles that give a thorough skill of client conduct and license planned and nuanced changes.
- Published
- 2024
- Full Text
- View/download PDF
21. Real-Time Elemental Analysis Using a Handheld XRF Spectrometer in Scanning Mode in the Field of Cultural Heritage.
- Author
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Asvestas, Anastasios, Chatzipanteliadis, Demosthenis, Gerodimos, Theofanis, Mastrotheodoros, Georgios P., Tzima, Anastasia, and Anagnostopoulos, Dimitrios F.
- Abstract
An X-ray fluorescence handheld spectrometer (hh-XRF) is adapted for real-time qualitative and quantitative elemental analysis in scanning mode for applications in cultural heritage. Specifically, the Tracer-5i (Bruker) is coupled with a low-cost constructed computer-controlled x–y target stage that enables the remote control of the target's movement under the ionizing X-ray beam. Open-source software synchronizes the spectrometer's measuring functions and handles data acquisition and data analysis. The spectrometer's analytical capabilities, such as sensitivity, energy resolution, beam spot size, and characteristic transition intensity as a function of the distance between the spectrometer and the target, are evaluated. The XRF scanner's potential in real-time imaging, object classification, and quantitative analysis in cultural heritage-related applications is explored and the imaging capabilities are tested by scanning a 19th-century religious icon. The elemental maps provide information on used pigments and reveal an underlying icon. The scanner's capability to classify metallic objects was verified by analyzing the measured raw spectra of a coin collection using Principal Components Analysis. Finally, the handheld's capability to perform quantitative analysis in scanning mode is demonstrated in the case of precious metals, applying a pre-installed quantification routine. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
22. SeqKit2: A Swiss army knife for sequence and alignment processing.
- Author
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Shen, Wei, Sipos, Botond, and Zhao, Liuyang
- Subjects
- *
SEQUENCE alignment , *NUCLEOTIDE sequencing , *SEQUENCE analysis , *KNIVES - Abstract
In the era of ubiquitous high‐throughput sequencing studies, there is a growing need for analysis tools that are not just performant but also comprehensive and user‐friendly enough to cater to both novice and advanced users. This article introduces SeqKit2, the next iteration of the widely used sequence analysis tool SeqKit, featuring expanded functionality, performance optimizations, and support for additional compression methods. Retaining a pragmatic subcommand architecture, SeqKit2 represents substantial enhancement through the inclusion of 19 additional subcommands, expanding its overall repertoire to a total of 38 in eight categories. The new subcommands add functionality such as amplicon processing and robust, error‐tolerant parsing of sequence records. In addition, three subcommands designed for real‐time analysis are added for periodic monitoring of properties of FASTQ and Binary Alignment/Map alignment records and real‐time streaming from multiple sequence files. The performance of SeqKit2 is benchmarked against the old version of SeqKit, Bioawk, Seqtk, and SeqFu tools. SeqKit2 consistently outperforms its predecessor, albeit with marginally higher memory usage, while maintaining competitive runtimes against other tools. With its broad functionality, proven usability, and ongoing development driven by user feedback, we hope that bioinformaticians will find SeqKit2 useful as a "Swiss army knife" of sequence and alignment processing—equally adept at facilitating ad hoc analyses and seamlessly integrating into larger pipelines. Highlights: SeqKit2 expands its capabilities, doubling the number of subcommands from 19 to 38, and adding support for three more compression file formats.SeqKit2 outperforms its predecessor and maintains competitive with other tools.SeqKit2 improves user‐friendliness with new features, like, autocompletion, progress bars, and enhanced error handling. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. Lightweight Convolutional Network with Integrated Attention Mechanism for Missing Bolt Detection in Railways.
- Author
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Alif, Mujadded Al Rabbani and Hussain, Muhammad
- Subjects
RAILROAD maintenance & repair ,CONVOLUTIONAL neural networks ,RAILROAD tracks ,DEEP learning ,BOLTS & nuts - Abstract
Railway infrastructure safety is a paramount concern, with bolt integrity being a critical component. In the realm of railway maintenance, the detection of missing bolts is a vital task that ensures the stability and safety of tracks. Traditionally, this task has been approached through manual inspections or conventional automated methods, which are often time-consuming, costly, and prone to human error. Addressing these challenges, this paper presents a state-of-the-art solution with the development of a lightweight convolutional neural network (CNN) featuring an integrated attention mechanism. This novel model is engineered to be computationally efficient while maintaining high accuracy, making it particularly suitable for real-time analysis in resource-constrained environments commonly found in railway inspections. The proposed CNN utilises a distinctive architecture that synergises the speed of lightweight networks with the precision of attention-based mechanisms. By integrating an attention mechanism, the network selectively concentrates on regions of interest within the image, effectively enhancing the model's capability to identify missing bolts with remarkable accuracy. Comprehensive testing showcases a remarkable 96.43% accuracy and an impressive 96 F1-score, substantially outperforming existing deep learning frameworks in the context of missing bolt detection. Key contributions of this research include the model's innovative attention-integrated approach, which significantly reduces the model complexity without compromising detection performance. Additionally, the model offers scalability and adaptability to various railway settings, proving its efficacy not just in controlled environments but also in diverse real-world scenarios. Extensive experiments, rigorous evaluations, and real-time deployment results collectively underscore the transformative potential of the presented CNN model in advancing the domain of railway safety maintenance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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24. Ultrafast Detection of Arsenic Using Carbon-Fiber Microelectrodes and Fast-Scan Cyclic Voltammetry.
- Author
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Manring, Noel, Strini, Miriam, Koifman, Gene, Xavier, Jonathan, Smeltz, Jessica L., and Pathirathna, Pavithra
- Subjects
CYCLIC voltammetry ,ARSENIC ,MICROELECTRODES ,DETECTION limit ,IN vivo studies - Abstract
Arsenic contamination poses a significant public health risk worldwide, with chronic exposure leading to various health issues. Detecting and monitoring arsenic exposure accurately remains challenging, necessitating the development of sensitive detection methods. In this study, we introduce a novel approach using fast-scan cyclic voltammetry (FSCV) coupled with carbon-fiber microelectrodes (CFMs) for the electrochemical detection of As
3+ . Through an in-depth pH study using tris buffer, we optimized the electrochemical parameters for both acidic and basic media. Our sensor demonstrated high selectivity, distinguishing the As3+ signal from those of As5+ and other potential interferents under ambient conditions. We achieved a limit of detection (LOD) of 0.5 μM (37.46 ppb) and a sensitivity of 2.292 nA/μM for bare CFMs. Microscopic data confirmed the sensor's stability at lower, physiologically relevant concentrations. Additionally, using our previously reported double-bore CFMs, we simultaneously detected As3+ -Cu2+ and As3+ -Cd2+ in tris buffer, enhancing the LOD of As3+ to 0.2 μM (14.98 ppb). To our knowledge, this is the first study to use CFMs for the rapid and selective detection of As3+ via FSCV. Our sensor's ability to distinguish As3+ from As5+ in a physiologically relevant pH environment showcases its potential for future in vivo studies. [ABSTRACT FROM AUTHOR]- Published
- 2024
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25. A communication-efficient, online changepoint detection method for monitoring distributed sensor networks.
- Author
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Yang, Ziyang, Eckley, Idris A., and Fearnhead, Paul
- Abstract
We consider the challenge of efficiently detecting changes within a network of sensors, where we also need to minimise communication between sensors and the cloud. We propose an online, communication-efficient method to detect such changes. The procedure works by performing likelihood ratio tests at each time point, and two thresholds are chosen to filter unimportant test statistics and make decisions based on the aggregated test statistics respectively. We provide asymptotic theory concerning consistency and the asymptotic distribution if there are no changes. Simulation results suggest that our method can achieve similar performance to the idealised setting, where we have no constraints on communication between sensors, but substantially reduce the transmission costs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. A constant-per-iteration likelihood ratio test for online changepoint detection for exponential family models.
- Author
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Ward, Kes, Romano, Gaetano, Eckley, Idris, and Fearnhead, Paul
- Abstract
Online changepoint detection algorithms that are based on (generalised) likelihood-ratio tests have been shown to have excellent statistical properties. However, a simple online implementation is computationally infeasible as, at time T, it involves considering O(T) possible locations for the change. Recently, the FOCuS algorithm has been introduced for detecting changes in mean in Gaussian data that decreases the per-iteration cost to O (log T) . This is possible by using pruning ideas, which reduce the set of changepoint locations that need to be considered at time T to approximately log T . We show that if one wishes to perform the likelihood ratio test for a different one-parameter exponential family model, then exactly the same pruning rule can be used, and again one need only consider approximately log T locations at iteration T. Furthermore, we show how we can adaptively perform the maximisation step of the algorithm so that we need only maximise the test statistic over a small subset of these possible locations. Empirical results show that the resulting online algorithm, which can detect changes under a wide range of models, has a constant-per-iteration cost on average. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
27. LDANet: the laplace-guided detail-constrained asymmetric network for real-time semantic segmentation.
- Author
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Zhu, Zhifang, Wu, Wenhao, Wang, Hongzhou, Li, Hengyu, He, Yibo, Liu, Yuanjie, Lu, Quanguo, and Zhan, Xiaohuang
- Subjects
ARTIFICIAL neural networks ,MARKOV random fields ,IMAGE segmentation ,FEATURE extraction ,GRAPHICS processing units - Abstract
The current mainstream image semantic segmentation networks often suffer from mis-segmentation, segmentation discontinuity, and high model complexity, which limit their application in real-time processing scenarios. The work established a lightweight neural network model for semantic segmentation to address this issue. The network used a dual-branch strategy to solve low semantic boundary segmentation accuracy in semantic segmentation tasks. The semantic branch applied the characteristics of the deeplabv3 + model structure. Besides, dilated convolutions with different dilation rates in the encoder were used to expand the receptive field of convolutional operations and enhance the ability to capture local features. The boundary refinement branch extracted second-order differential features of the input image through the Laplace operator, and it gradually refined the second-order differential features through a feature refinement extraction module to obtain advanced semantic features. A convolutional block attention module was introduced to filter the features from both the channel and spatial dimensions and finally fused with the semantic branch to achieve constrained segmentation boundary effects. Based on this, a multi-channel attention fusion module was proposed to aggregate features from different stages. Low-resolution features were first up-sampled and then fused with high-resolution features to enhance the spatial information of high-level features. Proposed network's effectiveness was demonstrated through extensive experiments on the MaSTr1325 dataset, the MID dataset, the Camvid dataset, and the PASCAL VOC2012 dataset, with mIoU of 98.1, 73.1, and 81.1% and speeds of 111.40, 100.36, and 111.43 fps on a single NVIDIA RTX 3070 GPU, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
28. Adapting user experience with reinforcement learning: Personalizing interfaces based on user behavior analysis in real-time.
- Author
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Khamaj, Abdulrahman and Ali, Abdulelah M.
- Subjects
REINFORCEMENT learning ,USER interfaces ,BEHAVIORAL assessment ,USER experience - Abstract
Developing a dynamic, personalized user interface that changes in real-time in response to user behavior is the goal. This paper supplies a modern method to beautify consumers enjoy using Reinforcement Learning (RL) and a Deep Q Network (DQN). Through support examination, the task objectives are to upgrade buyer connections and increment commitment, delight, and undertaking of consummation rates. Users who utilize traditional user interfaces get a common experience because they're impersonal and unflexible. The potential for higher engagement and happiness levels is limited in the absence of real-time changes based on individual preferences and behaviors. To overcome this problem, the study suggests a cunning technique for a getting-to-comprehend layout that may constantly analyze and modify patron communications. This evaluation is new as it provides a blended RL and DQN framework that modifies person interfaces grade by grade. Dissimilar to conventional methodologies, the proposed form adjusts the utilization of well-known, over-the-top prize moves with the development of the most recent ones through an investigation double-dealing system. EventType, contentId, personId, sensorId, and timestamp are instances of timestamped insights handles that give a thorough skill of client conduct and license planned and nuanced changes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
29. Enhancing Real-Time Malware Analysis with Quantum Neural Networks.
- Author
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Bikku, Thulasi, Chandolu, Suresh Babu, Praveen, S. Phani, Tirumalasetti, Narasimha Rao, Swathi, K., and Sirisha, U.
- Subjects
MACHINE learning ,REAL-time computing ,SUPPORT vector machines ,FEATURE extraction ,QUANTUM computing - Abstract
The proposed Quantum Neural Networks (QNN) perform better than traditional machine learning models. The escalating complexity of malware poses a significant challenge to cybersecurity, necessitating innovative approaches to keep pace with its rapid evolution. Contemporary malware analysis techniques underscore the urgent need for solutions that can adapt to the dynamic functionalities of evolving malware. In this context, Quantum Neural Networks (QNNs) emerge as a cutting-edge and distinctive approach to malware analysis, promising to overcome the limitations of conventional methods. Our exploration of QNNs focuses on uncovering their valuable applications, particularly in real-time malware research. We meticulously examine the advantages of QNNs in contrast to conventional machine-learning methods employed in malware detection and classification. The proposed QNN showcases its unique capability to handle complex patterns, emphasizing its potential to achieve heightened levels of accuracy. Our contribution extends to introducing a dedicated framework for QNN-based malware analysis, harnessing the formidable computational capabilities of quantum computing for real-time malware analysis. This framework is structured around three pivotal components, Malware Feature Extraction utilizes quantum feature extraction techniques to identify relevant features from malware samples. Malware Classification employs a QNN classifier to categorize malware samples as benign or malicious. Real-Time Analysis enables the instantaneous examination of malware samples by integrating feature extraction and classification within a streaming data pipeline. Our proposed methodology undergoes comprehensive evaluation using a benchmark dataset of malware samples. The Proposed Quantum Neural Networks (QNNs) demonstrated a high accuracy of 0.95, outperforming other quantum models such as Quantum Support Vector Machines (QSVM) and Quantum Decision Trees (QDT), as well as classical models like Random Forest (RF), Support Vector Machines (SVM), and Decision Trees (DT) on the Malware DB dataset. The results affirm the framework's exceptional accuracy rates and low latency, establishing its suitability for real-time malware analysis. These findings underscore the potential for QNNs to revolutionize malware evaluation and strengthen real-time defenses against cyberattacks. While our research demonstrates promising outcomes, further exploration and development in this domain are imperative to fully exploit the extensive viability that QNNs offer for cybersecurity applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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30. 基于ADS-B和WEB的雷达精度分析系统.
- Author
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陈盛祝, 韩丙同, 贾少才, and 曹亮
- Abstract
Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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31. Real-Time Indoor Workout Analysis Using Computer Vision and MediaPipe
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Bavishi, Vansh S., Singh, Nivi, Senthil Raja, M., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Tiwari, Shailesh, editor, Trivedi, Munesh C., editor, Kolhe, Mohan L., editor, and Singh, Brajesh Kumar, editor
- Published
- 2024
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32. A Framework for Analysing Congestion Hotspots via Social-Media Text-Based Pattern Analysis
- Author
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Patil, Kaushal, Rajarshi, Rajkamal, Parakh, Parth, Raichandani, Jeet, Bharambe, Ujwala, Chaudhari, Ujwala, Ghosh, Ashish, Editorial Board Member, Patil, Mukesh, editor, Vyawahare, Vishwesh, editor, and Birajdar, Gajanan, editor
- Published
- 2024
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33. Traffic Optimization with AI-Powered Detection
- Author
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Murugesan, S., Mohanraj, S., Aravind Raj, S., Vaishnavee, M., Varnika, S., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Choudrie, Jyoti, editor, Mahalle, Parikshit N., editor, Perumal, Thinagaran, editor, and Joshi, Amit, editor
- Published
- 2024
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34. NextVision, an Intelligent Video Surveillance System Based on Computer Computer Vision and Natural Language Processing
- Author
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Houndji, Vinasetan Ratheil, Guedje, Prince Gedeon, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Yang, Xin-She, editor, Sherratt, R. Simon, editor, Dey, Nilanjan, editor, and Joshi, Amit, editor
- Published
- 2024
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35. Investigation of performance reduction of PV system due to environmental dust: Indoor and real-time analysis
- Author
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Saumya Ranjan Lenka, Sonali Goel, Priya Ranjan Satpathy, Bibekananda Jena, and Renu Sharma
- Subjects
Performance reduction ,Mineralogical analysis ,Image characterization ,Real-time analysis ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
This paper analyzes the effect of different types of dust on the reduction of PV systems' performance. The PV system installed on the field gives maximum output. However, in a real-time scheme, the PV system fails to generate the desired power output due to various realistic and unavoidable factors like soiling. Different dust particles accumulating on photovoltaic (PV) modules result in shadowing and reduced irradiance, impacting power production. The study investigates eight dust samples (ash, dirt, cement, brick powder, putty, wood dust, sand, and salt) in indoor and outdoor environments. It evaluates the decrease in power at solar irradiance levels of 500, 700, and 1000 W/m². The soiling experiments conducted indoors show that the maximum% reduction in power is 39.21 % in the case of Ash, while a minimum of 8.32 % in the case of red soil. The outdoor experiments suggest that red soil, sand, and brick dust can create huge power losses in the PV system, followed by ash powder, wood dust, putty dust, salt, and cement powder. The advantages of this research lie in its thorough analysis of several forms of dust and their impact on photovoltaic (PV) systems under different circumstances. Furthermore, the study emphasizes the crucial need for implementing dust control measures to maximize system performance, thereby providing insightful information for system design and maintenance procedures. The novelty of this study is to investigate the performance impact of various kinds of dust on PV systems, offering significant insights for improving system efficiency in real-world circumstances. The research enhances the reliability and applicability of its results by thoroughly assessing outdoor and indoor conditions, bridging the gap between laboratory results and practical applications.
- Published
- 2024
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36. Real‐Time Product Detection during CO2 Electroreduction on SCILL‐Modified Cu Catalysts
- Author
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Walter A. Parada, Karl J. J. Mayrhofer, and Pavlo Nikolaienko
- Subjects
Ionic liquids ,Copper ,CO2 electroreduction ,Real-Time Analysis ,Screening Flow Cell ,Industrial electrochemistry ,TP250-261 ,Chemistry ,QD1-999 - Abstract
Abstract Modifying the chemical environment of active surfaces with ionic liquids (IL) is an emerging strategy for tailoring novel electrocatalytic systems, including carbon dioxide reduction (CO2RR). Although copper (Cu) catalysts have recently gained more attention in this field, their modification with ILs is yet to be investigated. This work tested a range of common hydrophobic ILs impregnated into carbon‐supported Cu catalysts, following the “solid catalyst with ionic liquid layer” (SCILL) approach. The latter was used to showcase the applicability of real‐time product detection for CO2RR employing electrochemical mass spectrometry. The observed patterns of C1 to C3 product selectivity offered valuable insights into the intricate reaction mechanism. In addition, increasing the size of the IL cation showed an opposite and significant effect on the reaction selectivity. The obtained qualitative results were partially compared with conventional long‐term experiments.
- Published
- 2024
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37. Comparison of Linear and Nonlinear Model Predictive Control in Path Following of Underactuated Unmanned Surface Vehicles.
- Author
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Li, Wenhao, Zhang, Xianxia, Wang, Yueying, and Xie, Songbo
- Subjects
PREDICTION models ,REAL-time control ,PROGRAMMING languages ,RESEARCH personnel ,AUTONOMOUS vehicles ,REMOTELY piloted vehicles - Abstract
Model predictive control (MPC), an extensively developed rolling optimization control method, is widely utilized in the industrial field. While some researchers have incorporated predictive control into underactuated unmanned surface vehicles (USVs), most of these approaches rely primarily on theoretical simulation research, emphasizing simulation outcomes. A noticeable gap exists regarding whether predictive control adequately aligns with the practical application conditions of underactuated USVs, particularly in addressing real-time challenges. This paper aims to fill this void by focusing on the application of MPC in the path following of USVs. Using the hydrodynamic model of USVs, we examine the details of both linear MPC (LMPC) and nonlinear MPC (NMPC). Several different paths are designed to compare and analyze the simulation results and time consumption. To address the real-time challenges of MPC, the calculation time under different solvers, CPUs, and programming languages is detailed through simulation. The results demonstrate that NMPC exhibits superior control accuracy and real-time control potential. Finally, we introduce an enhanced A* algorithm and use it to plan a global path. NMPC is then employed to follow that path, showing its effectiveness in tracking a common path. In contrast to some literature studies using the LMPC method to control underactuated USVs, this paper presents a different viewpoint based on a large number of simulation results, suggesting that LMPC is not fit for controlling underactuated USVs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
38. Gold Nanoparticle-Modified Carbon-Fiber Microelectrodes for the Electrochemical Detection of Cd 2+ via Fast-Scan Cyclic Voltammetry.
- Author
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Manring, Noel, Strini, Miriam, Koifman, Gene, Smeltz, Jessica L., and Pathirathna, Pavithra
- Subjects
CYCLIC voltammetry ,MICROELECTRODES ,GEOCHEMICAL modeling ,HEAVY metals ,METAL ions ,GOLD nanoparticles ,CENTRAL nervous system ,COMPLEX matrices - Abstract
Neurotoxic heavy metals, such as Cd
2+ , pose a significant global health concern due to their increased environmental contamination and subsequent detrimental health hazards they pose to human beings. These metal ions can breach the blood-brain barrierblood–brain barrier, leading to severe and often irreversible damage to the central nervous system and other vital organs. Therefore, developing a highly sensitive, robust, and rapid in vivo detection method for these hazardous heavy metal ions is of the utmost importance for early detection, thus initiating timely therapeutics. Detecting ultra-low levels of toxic metal ions in vivo and obtaining accurate speciation information remains a challenge with conventional analytical techniques. In this study, we fabricated a novel carbon carbon-fiber microelectrode (CFM)-based sensor that can detect Cd2+ ions using fast-scan cyclic voltammetry by electrodepositing gold nanoparticles (AuNP). We optimized electrochemical parameters that generate a unique cyclic voltammogram (CV) of Cd2+ at a temporal resolution of 100 ms with our novel sensor. All our experiments were performed in tris buffer that mimics the artificial cerebellum fluid. We established a calibration curve resulting in a limit of detection (LOD) of 0.01 µM with a corresponding sensitivity of 418.02 nA/ µM. The sensor's selectivity was evaluated in the presence of other metal ions, and it was noteworthy to observe that the sensor retained its ability to produce the distinctive Cd2+ CV, even when the concentration of other metal ions was 200 times higher than that of Cd2+ . We also found that our sensor could detect free Cd2+ ions in the presence of complexing agents. Furthermore, we analyzed the solution chemistry of each of those Cd2+ –ligand solutions using a geochemical model, PHREEQC. The concentrations of free Cd2+ ions determined through our electrochemical data align well with geochemical modeling data, thus validating the response of our novel sensor. Furthermore, we reassessed our sensor's LOD in tris buffer based on the concentration of free Cd2+ ions determined through PHREEQC analysis, revealing an LOD of 0.00132 µM. We also demonstrated the capability of our sensor to detect Cd2+ ions in artificial urine samples, showcasing its potential for application in actual biological samples. To the best of our knowledge, this is the first AuNP-modified, CFM-based Cd2+ sensor capable of detecting ultra-low concentrations of free Cd2+ ions in different complex matrices, including artificial urine at a temporal resolution of 100 ms, making it an excellent analytical tool for future real-time, in vivo detection, particularly in the brain. [ABSTRACT FROM AUTHOR]- Published
- 2024
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- View/download PDF
39. Analysis of VOCs in Liquids through Vaporization in a Tubular Oven Monitored by Chemical Ionization Mass Spectrometry.
- Author
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Abar, Taous, Mestdagh, Hélène, Heninger, Michel, and Lemaire, Joel
- Subjects
- *
CHEMICAL ionization mass spectrometry , *CYCLOTRON resonance , *PROTON transfer reactions , *LIQUID analysis , *ANALYTICAL chemistry , *VAPORIZATION - Abstract
The analysis of chemical compounds present at trace levels in liquids is important not only for environmental measurements but also, for example, in the health sector. The reference technique for the analysis of Volatile Organic Compounds (VOCs) in liquids is GC, which is difficult to use with an aqueous matrix. In this work, we present an alternative technique to GC to analyze VOCs in water. A tubular oven is used to completely vaporize the liquid sample deposited on a gauze. The oven is heated in the presence of a dinitrogen flow, and the gas is analyzed at the exit of the oven by a chemical ionization mass spectrometer developed in our laboratory. It is a low magnetic field Fourier Transform Ion Cyclotron Resonance (FT-ICR) optimized for real-time analysis. The Proton Transfer Reaction (PTR) used during the Chemical Ionization event results in the selective ionization of the VOCs present in the gas phase. The optimization of the desorption conditions is described for the main operating parameters: temperature ramp, liquid quantity, and nitrogen flow. Their influence is studied using a 100 ppmv aqueous toluene solution. The analytical method is then tested on a mixture of seven VOCs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
40. Sample Injection for Real-Time Analysis (SIRTA) Using GC-MS with Cold EI.
- Author
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Elkabets, Oneg, Neumark, Benny, and Amirav, Aviv
- Abstract
There is a continual demand for advanced methods and instruments for real-time analysis (RTA). Most of the current RTA techniques based on MS involve ambient desorption ionization technology. However, flow injection of liquid extracted samples is another option without added modifications or cost to existing LC-MS instruments. In this work, we introduce a new RTA approach named sample injection for real-time analysis (SIRTA) using GC-MS with Cold EI. In SIRTA, the standard GC column is replaced with a 1 m long 0.1 mm I.D. fused silica capillary that connects the GC injector to the MS transfer-line of Cold EI. Thus, SIRTA with Cold EI imposes no need for any additional instrumentation; hence, it is characterized by zero added cost. Like in flow injection in MS of LC-MS, the sample is dissolved in ∼1 mL methanol or another solvent. Subsequently, the vial is placed in the GC-MS autosampler while using a standard syringe for injection without any GC separation. The analysis takes merely 0.2–0.7 min, ensuring rapid and consecutive analyses. Unlike standard EI, Cold EI enables SIRTA by taking advantage of its fly through open ion source to avoid overwhelming the ion source during the elution of solvents while still providing enhanced molecular ions for nearly all analytes. In this study, we demonstrated SIRTA Cold EI analysis of 12 compounds and 7 mixtures, including various prescription and illicit drugs, cannabis and petroleum samples, and other synthetic organic compounds including those with molecular weight up to 800 g/mol. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Right and yet wrong: a politico-economic perspective on Germany's early COVID-19 policy.
- Author
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Berlemann, Michael and Haustein, Erik
- Subjects
AREA studies ,COVID-19 ,GOVERNMENT policy ,SPATIOTEMPORAL processes - Abstract
Applying a spatio-temporal endemic–epidemic forecasting model, we evaluate different perspectives on the adequacy of COVID-19 containment policies. Using Germany's early containment policy as an example, we show that containment policies judged as rational based on the real-time perspective of policymakers may be deemed unnecessary or ineffective in ex-post evaluations. We also demonstrate that one-size-fits-all policies implemented in Germany early in the pandemic are likely suboptimal. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
42. SeqKit2: A Swiss army knife for sequence and alignment processing
- Author
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Wei Shen, Botond Sipos, and Liuyang Zhao
- Subjects
performance optimization ,real‐time analysis ,sequence processing ,usability ,user‐friendly ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract In the era of ubiquitous high‐throughput sequencing studies, there is a growing need for analysis tools that are not just performant but also comprehensive and user‐friendly enough to cater to both novice and advanced users. This article introduces SeqKit2, the next iteration of the widely used sequence analysis tool SeqKit, featuring expanded functionality, performance optimizations, and support for additional compression methods. Retaining a pragmatic subcommand architecture, SeqKit2 represents substantial enhancement through the inclusion of 19 additional subcommands, expanding its overall repertoire to a total of 38 in eight categories. The new subcommands add functionality such as amplicon processing and robust, error‐tolerant parsing of sequence records. In addition, three subcommands designed for real‐time analysis are added for periodic monitoring of properties of FASTQ and Binary Alignment/Map alignment records and real‐time streaming from multiple sequence files. The performance of SeqKit2 is benchmarked against the old version of SeqKit, Bioawk, Seqtk, and SeqFu tools. SeqKit2 consistently outperforms its predecessor, albeit with marginally higher memory usage, while maintaining competitive runtimes against other tools. With its broad functionality, proven usability, and ongoing development driven by user feedback, we hope that bioinformaticians will find SeqKit2 useful as a “Swiss army knife” of sequence and alignment processing—equally adept at facilitating ad hoc analyses and seamlessly integrating into larger pipelines.
- Published
- 2024
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- View/download PDF
43. Nowcasting and forecasting the 2022 U.S. mpox outbreak: Support for public health decision making and lessons learned
- Author
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Kelly Charniga, Zachary J. Madewell, Nina B. Masters, Jason Asher, Yoshinori Nakazawa, and Ian H. Spicknall
- Subjects
Monkeypox virus ,Modeling ,Epidemic ,Real-time analysis ,Situational awareness ,Infectious and parasitic diseases ,RC109-216 - Abstract
In June of 2022, the U.S. Centers for Disease Control and Prevention (CDC) Mpox Response wanted timely answers to important epidemiological questions which can now be answered more effectively through infectious disease modeling. Infectious disease models have shown to be valuable tools for decision making during outbreaks; however, model complexity often makes communicating the results and limitations of models to decision makers difficult. We performed nowcasting and forecasting for the 2022 mpox outbreak in the United States using the R package EpiNow2. We generated nowcasts/forecasts at the national level, by Census region, and for jurisdictions reporting the greatest number of mpox cases. Modeling results were shared for situational awareness within the CDC Mpox Response and publicly on the CDC website. We retrospectively evaluated forecast predictions at four key phases (early, exponential growth, peak, and decline) during the outbreak using three metrics, the weighted interval score, mean absolute error, and prediction interval coverage. We compared the performance of EpiNow2 with a naïve Bayesian generalized linear model (GLM). The EpiNow2 model had less probabilistic error than the GLM during every outbreak phase except for the early phase. We share our experiences with an existing tool for nowcasting/forecasting and highlight areas of improvement for the development of future tools. We also reflect on lessons learned regarding data quality issues and adapting modeling results for different audiences.
- Published
- 2024
- Full Text
- View/download PDF
44. Update 3.1 to FonaDyn — a system for real-time analysis of the electroglottogram, over the voice range
- Author
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Sten Ternström
- Subjects
Voice mapping ,Electroglottography ,Real-time analysis ,Voice range profile ,Phonation types ,Supercollider ,Computer software ,QA76.75-76.765 - Abstract
The human voice is notoriously variable, and conventional measurement paradigms are weak in terms of providing evidence for effects of treatment and/or training of voices. New methods are needed that can take into account the variability of metrics and types of phonation across the voice range. The “voice map” is a generalization of the Voice Range Profile (a.k.a. the phonetogram), with the potential to be used in many ways, for teaching, training, therapy and research. FonaDyn is intended as a proof-of concept workbench for education and research on phonation, and for exploring and validating the analysis paradigm of voice-mapping. Version 3.1 of the FonaDyn system adds many new functions, including listening from maps; displaying multiple maps and difference maps to track effects of voice interventions; smoothing/interpolation of voice maps; clustering not only of EGG shapes but also of acoustic and EGG metrics into phonation types; extended multichannel acquisition; 24-bit recording with optional max 140 dB SPL; a built-in SPL calibration and signal diagnostics tool; EGG noise suppression; more Matlab integration; script control; the acoustic metrics Spectrum Balance, Cepstral Peak Prominence and Harmonic Richness Factor (of the EGG); and better window layout control. Stability and usability are further improved. Apple M-series processors are now supported natively.
- Published
- 2024
- Full Text
- View/download PDF
45. Investigation of Electrochemical Solid-Liquid Interfaces Using In Situ Liquid Time-of-flight Secondary Ion Mass Spectrometry
- Author
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ZHANG Yan-yan and WANG Fu-yi1,2
- Subjects
• electrochemical solid-liquid interfaces ,in situ liquid time-of-flight secondary ion mass spectrometry ,in situ analysis ,real-time analysis ,Chemistry ,QD1-999 - Abstract
Electrochemical interfaces are the core of various important fields, such as energy conversion and storage, biochemistry, sensors, and corrosion. The investigations of the structure-performance relationship of electrochemical solid-liquid interfaces have become a hot topic yet extremely challenging due to the fact that the interfaces are ultrathin, highly dynamic and extremely complex. Mass spectrometric techniques coupled with electrochemistry are powerful and have been widely applied in investigations of mechanisms of electrochemical reactions. However, traditional mass spectrometry (MS) is difficult to characterize the electrode-electrolyte interfaces in an in situ manner due to inherent limitations existing in their ionization processes. In recent years, the state-of-the-art in situ liquid time-of-flight secondary ion MS (ToF-SIMS) based on high-vacuum compatible microfluidic devices has been developed to tackle with this challenge. This review mainly reviewed the principle, characteristics and rapid development of in situ liquid ToF-SIMS in real-time and in situ investigations of electrochemical solid-liquid interfaces during the past decade. In situ liquid ToF-SIMS possesses shallow information depth (nm), high temporal resolution (μs) and high detection sensitivity (10-6-10-9). Besides, it ionizes the electrochemical interfaces in a truly in situ manner and provides direct molecular evidences of chemical evolution of both electrode/electrocatalyst surfaces and reactants/intermediates/products in electrolytes at the interfaces simultaneously. Being attributed to its uniqueness, in situ liquid ToF-SIMS has become a powerful and versatile molecular "eye" in in situ and real-time tracking dynamic electrochemical solid-liquid interfaces, such as capturing electrochemical reaction intermediates, identification of electrocatalytic active sites, probing fine structures of electrochemical double layers, and unraveling the formation chemistry of solid-electrolyte interphases in batteries. Further innovations of microfluidic electrochemical devices and ToF-SIMS instruments are desired to promote the enhanced performance and wider applications of in situ liquid ToF-SIMS in the electrochemical field, and in situ liquid ToF-SIMS will make significant contributions to the understanding of the structure-performance relationship of interfaces in complex electrochemical assays and guide the engineering of better electrochemical interfaces in important fields, such as electrocatalysis and batteries.
- Published
- 2024
- Full Text
- View/download PDF
46. Investigating the Quantification Capabilities of a Nanopore-Based Sequencing Platform for Food Safety Application via External Standards of Lambda DNA and Lambda Spiked Beef
- Author
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Sky Harper, Katrina L. Counihan, Siddhartha Kanrar, George C. Paoli, Shannon Tilman, and Andrew G. Gehring
- Subjects
nanopore sequencing ,foodborne pathogen quantification ,real-time analysis ,food testing ,Chemical technology ,TP1-1185 - Abstract
Six hundred million cases of disease and roughly 420,000 deaths occur globally each year due to foodborne pathogens. Current methods to screen and identify pathogens in swine, poultry, and cattle products include immuno-based techniques (e.g., immunoassay integrated biosensors), molecular methods (e.g., DNA hybridization and PCR assays), and traditional culturing. These methods are often used in tandem to screen, quantify, and characterize samples, prolonging real-time comprehensive analysis. Next-generation sequencing (NGS) is a relatively new technology that combines DNA-sequencing chemistry and bioinformatics to generate and analyze large amounts of short- or long-read DNA sequences and whole genomes. The goal of this project was to evaluate the quantitative capabilities of the real-time NGS Oxford Nanopore Technologies’ MinION sequencer through a shotgun-based sequencing approach. This investigation explored the correlation between known amounts of the analyte (lambda DNA as a pathogenic bacterial surrogate) with data output, in both the presence and absence of a background matrix (Bos taurus DNA). A positive linear correlation was observed between the concentration of analyte and the amount of data produced, number of bases sequenced, and number of reads generated in both the presence and absence of a background matrix. In the presence of bovine DNA, the sequenced data were successfully mapped to the NCBI lambda reference genome. Furthermore, the workflow from pre-extracted DNA to target identification took less than 3 h, demonstrating the potential of long-read sequencing in food safety as a rapid method for screening, identification, and quantification.
- Published
- 2024
- Full Text
- View/download PDF
47. 基于原位液相飞行时间二次离子质谱的电化学固液界面研究.
- Author
-
张燕燕 and 汪福意
- Abstract
Electrochemical interfaces are the core of various important fields, such as energy conversion and storage, biochemistry, sensors, and corrosion. The investigations of the structure-performance relationship of electrochemical solid-liquid interfaces have become a hot topic yet extremely challenging due to the fact that the interfaces are ultrathin, highly dynamic and extremely complex. Mass spectrometric techniques coupled with electrochemistry are powerful and have been widely applied in investigations of mechanisms of electrochemical reactions. However, traditional mass spectrometry (MS) is difficult to characterize the electrode-electrolyte interfaces in an in situ manner due to inherent limitations existing in their ionization processes. In recent years, the state-of-the-art in situ liquid time-of-flight secondary ion MS (ToF-SIMS) based on high-vacuum compatible microfluidic devices has been developed to tackle with this challenge. This review mainly reviewed the principle, characteristics and rapid development of in situ liquid ToF-SIMS in real-time and in situ investigations of electrochemical solid-liquid interfaces during the past decade. In situ liquid ToF-SIMS possesses shallow information depth (nm), high temporal resolution (μs) and high detection sensitivity (10-6-10-9). Besides, it ionizes the electrochemical interfaces in a truly in situ manner and provides direct molecular evidences of chemical evolution of both electrode/electrocatalyst surfaces and reactants/intermediates/products in electrolytes at the interfaces simultaneously. Being attributed to its uniqueness, in situ liquid ToF-SIMS has become a powerful and versatile molecular "eye" in in situ and real-time tracking dynamic electrochemical solid-liquid interfaces, such as capturing electrochemical reaction intermediates, identification of electrocatalytic active sites, probing fine structures of electrochemical double layers, and unraveling the formation chemistry of solid-electrolyte interphases in batteries. Further innovations of microfluidic electrochemical devices and ToF-SIMS instruments are desired to promote the enhanced performance and wider applications of in situ liquid ToF-SIMS in the electrochemical field, and in situ liquid ToF-SIMS will make significant contributions to the understanding of the structure-performance relationship of interfaces in complex electrochemical assays and guide the engineering of better electrochemical interfaces in important fields, such as electrocatalysis and batteries. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
48. High‐throughput determination of grain size distributions by EBSD with low‐discrepancy sampling.
- Author
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Long, Timothy J. H., Holbrook, William, Hufnagel, Todd C., and Mueller, Tim
- Subjects
- *
PARTICLE size distribution , *MECHANICAL behavior of materials , *CONSTRUCTION materials , *HIGH throughput screening (Drug development) , *ELECTRON diffraction , *GRAIN - Abstract
Because microstructure plays an important role in the mechanical properties of structural materials, developing the capability to quantify microstructures rapidly is important to enabling high‐throughput screening of structural materials. Electron backscatter diffraction (EBSD) is a common method for studying microstructures and extracting information such as grain size distributions (GSDs), but is not particularly fast and thus could be a bottleneck in high‐throughput systems. One approach to accelerating EBSD is to reduce the number of points that must be scanned. In this work, we describe an iterative method for reducing the number of scan points needed to measure GSDs using incremental low‐discrepancy sampling, including on‐the‐fly grain size calculations and a convergence test for the resulting GSD based on the Kolmogorov–Smirnov test. We demonstrate this method on five real EBSD maps collected from magnesium AZ31B specimens and compare the effectiveness of sampling according to two different low discrepancy sequences, the Sobol and R2 sequences, and random sampling. We find that R2 sampling is able to produce GSDs that are statistically very similar to the GSDs of the full density grids using, on average, only 52% of the total scan points. For EBSD maps that contained monodisperse GSDs and over 1000 grains, R2 sampling only required an average of 39% of the total EBSD points. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. Octahedral Pt–Ni Alloy Nanoparticles Decorated on 3D Interconnected Porous Carbon Nanosheets for Voltammetric Determination of Dihydroxybenzene Isomers.
- Author
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Veerakumar, Pitchaimani, Sangili, Arumugam, Chen, Shen-Ming, Vinothkumar, Venkatachalam, and Kim, Tae Hyun
- Abstract
Ultrathin three-dimensional (3D) interconnected porous carbon nanosheets (PCNs) derived from Moringa oleifera barks (commonly known as the drumstick tree) with electrochemical (EC) sensor performance was employed as the carbon precursor. In this study, we described a simple one-step pyrolysis technique to generate hierarchical PCN using a high-temperature pyrolysis and KOH activation procedure. Using the microwave-solvothermal approach, platinum–nickel bimetallic octahedral nanoparticles were decorated on ultrathin 3D PCN (referred to as Pt–Ni@PCN). The morphological, structural, and EC properties of the Pt–Ni@PCN nanocomposite were well characterized. Using cyclic voltammetry and linear sweep voltammetry, the dihydroxybenzene (DHB) isomers hydroquinone, catechol, and resorcinol were identified individually as well as simultaneously. The screen-printed carbon electrode-modified nanocomposite [Pt–Ni@PCN/screen-printed carbon electrode (SPCE)] served as an outstanding electron (e
– )-transfer mediator for DHB isomer oxidation, yielding limits of detection of 0.0093, 0.0263, and 0.0529 μM, respectively. Also, the Pt–Ni@PCN/SPCE sensor has exceptional selectivity, long-term durability, reproducibility, repeatability, and anti-interference. Furthermore, the proposed sensor can be exploited to detect simultaneously environmental pollutants in river, lake, and tap water samples with good recovery rates. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
50. Structural Health Monitoring Design and Performance Evaluation of a Middle-Span Bridge.
- Author
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Xiang, Wei, Wei, Jiaoyuan, and Zhang, Fengliang
- Subjects
- *
STRUCTURAL health monitoring , *STRAINS & stresses (Mechanics) , *BRIDGES , *FINITE element method , *BRIDGE foundations & piers , *ONLINE monitoring systems , *LONG-span bridges - Abstract
Structural health monitoring (SHM) has attracted significant attention over the past two decades due to its ability to provide real-time insight into the condition of structures. Despite the development of several SHM systems for long-span bridges, which play a crucial role in the assessment of these structures, studies focusing on short- or middle-span bridges remain scarce. This research paper presents an efficient and practical bridge monitoring and warning system established on a middle-span bridge, a key crossroad bridge located in Shenzhen. The monitoring system consists of sensors and measuring points that collect a substantial amount of data, enabling the close monitoring of various operational indicators to facilitate the early detection of threshold exceedances. Based on this system, the subtle condition of the bridge can be evaluated, and the operational condition of the bridge can be studied through the comparative analysis of the collected data. Over four months of monitoring, data including the strain and creep of the main beam, the strain and settlement of piers and the crack width of the bridge body are observed. Furthermore, the real-time operational status of the bridge is analyzed and evaluated through the combination of the collected data and the structural finite element model. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
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