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Comparative Study on Fall Detection using Machine Learning Approaches 19

Comparative Study on Fall Detection using Machine Learning A...

19th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2022

作者： Tongskulroongruang, Thienrawit Wiphunawat, Paphatchaya Jutharee, Wisanu Kaewmahanin, Watchara Rassameecharoenchai, Teerameth Jennawasin, Tanagorn Kaewkamnerdpong, Boonserm King Mongkut's University of Technology Thonburi Department of Control Systems and Instrumentation Engineering Bangkok Thailand Institute of Field Robotics and Automation King Mongkut's University of Technology Thonburi Bangkok Thailand Naresuan University Faculty of Allied Health Sciences Department of Cardiothoracic Technology Phitsanulok Thailand King Mongkut's University of Technology Thonburi Biological Engineering Program Faculty of Engineering Bangkok Thailand

ISBN: (纸本)9781665485845

Falls are one of the most dangerous problems for the elderly. A reliable fall detection system can aid in reducing the harmful repercussions of an unintentional fall. The focus of this paper is on a dataset that includes signals from portable devices. We propose a simple feature selection approach to reduce the number of effective input attributes based on a voting strategy. The dataset is classified into three categories, i.e., pre-fall, fall and post-fall using various machine learning approaches. The computational time is significantly reduced for most of the classification algorithms, and the relative reduction reaches to 66.67% with decision tree algorithm. Classification accuracy can reach as high as 95.17% when using neural network, while the relative reductions on the classification accuracy due to the feature selection do not exceed 1.50%. © 2022 IEEE.

关键词： Decision trees

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A reduced switch stress common-ground boosting multilevel inverter for renewable energy applications

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e-Prime - Advances in Electrical engineering, Electronics and Energy 2025年 12卷

作者： Zaid, Mohammad Ali, Mohammad Sarwar, Adil Khalid, Muhammad Iqbal, Atif Department of Electrical Engineering Z.H. College of Engg. & Tech. Aligarh Muslim University Aligarh 202002 India Department of Electrical Engineering College of Engineering King Faisal University Al Ahsa 31982 Saudi Arabia Electrical Engineering Department KFUPM 31261 Saudi Arabia Interdisciplinary Research Center for Sustainable Energy Systems KFUPM 31261 Saudi Arabia Department of Electrical engineering Qatar University Doha 2713 Qatar

Renewable energy sources like solar photovoltaic (solar-PV), and the battery storage system require DC-AC converters (inverters) to deliver power to the grid or standalone loads. The operation requires obtaining a sinusoidal voltage waveform at the output, and multilevel inverters (MLIs) produce better-quality waveforms than conventional two-level inverters. Switched-capacitor MLIs (SCMLI)are one typr of inverters that utilize the DC-capacitors as sources and get charged through the DC source. Additionally, they have recently shown their efficacy through reduced components and generating boosted output voltage. However, most topologies lack common-ground structures and are liable to be subjected to high-frequency leakage currents when connected to the solar-PV through parasitic capacitance. On the other hand, the recent common-ground quadruple-boost SCMLI topologies exhibit high switch-blocking voltage (6 or 8 times V_dc). To address these issues, this paper proposes a new nine-level quadruple-boost common-ground inverter (9LQBCGI) suitable for microinverter applications, whose maximum switch stress is equal to the output voltage (4V_dc), and uses twelve switches, three self-balanced capacitors, and one diode. Further, a simple single resistance-relay-based soft-starting is performed, which results in a low starting inrush current. The proposed SCMLI is structurally and economically compared with recent nine-level, four-times boosting topologies. Reliability analysis has also been performed using Markov model. The operational verification is performed in simulation on MATLAB/Simulink and PLECS, and on a hardware prototype in the laboratory environment. © 2025

关键词： Boosting capability Clean energy Common-ground Less-device count Low blocking voltage Multilevel inverter

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Investigating the Usability of Collaborative Robot Control Through Hands-Free Operation Using Eye Gaze and Augmented Reality

Investigating the Usability of Collaborative Robot Control T...

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IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Joosun Lee Taeyhang Lim Wansoo Kim Department of Mechatronics Engineering Hanyang University Ansan Gyeonggi-do Republic of Korea Department of Interdisciplinary Robot Engineering Systems Hanyang University Ansan Gyeonggi-do Republic of Korea Robotics Department Hanyang University ERICA Ansan Gyeonggi-do Republic of Korea

This paper proposes a novel operation for controlling a mobile robot using a head-mounted device. Conventionally, robots are operated using computers or a joystick, which creates limitations in usability and flexibility because control equipment has to be carried by hand. This lack of flexibility may prevent workers from multitasking or carrying objects while operating the robot. To address this limitation, we propose a hands-free method to operate the mobile robot with a human gaze in an Augmented Reality (AR) environment. The proposed work is demonstrated using the HoloLens 2 to control the mobile robot, Robotnik Summit-XL, through the eye-gaze in AR. Stable speed control and navigation of the mobile robot were achieved through admittance control which was calculated using the gaze position. The experiment was conducted to compare the usability between the joystick and the proposed operation, and the results were validated through surveys (i.e., SUS, SEQ). The survey results from the participants after the experiments showed that the wearer of the HoloLens accurately operated the mobile robot in a collaborative manner. The results for both the joystick and the HoloLens were marked as easy to use with above-average usability. This suggests that the HoloLens can be used as a replacement for the joystick to allow hands-free robot operation and has the potential to increase the efficiency of human-robot collaboration in situations when hands-free controls are needed.

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Automatic Facial Asymmetry Analysis for Elderly Stroke Detection by using Cosine Similarity 19

Automatic Facial Asymmetry Analysis for Elderly Stroke Detec...

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19th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2022

作者： Kaewmahanin, Watchara Rassameecharoenchai, Teerameth Jutharee, Wisanu Tongskulroongruang, Thienrawit Wiphunawat, Paphatchaya Jennawasin, Tanagorn Kaewkamnerdpong, Boonserm Naresuan University Faculty of Allied Health Sciences Department of Cardiothoracic Technology Phitsanulok Thailand King Mongkut's University of Technology Thonburi Institute of Field Robotics and Automation Bangkok Thailand Mongkut's University of Technology Thonburi Department of Control Systems and Instrumentation Engineering Bangkok Thailand King Mongkut's University of Technology Thonburi Biological Engineering Program Faculty of Engineering Bangkok Thailand

ISBN: (纸本)9781665485845

For acute stroke patients, time to recognize the stroke symptom onset is crucial for the lifesaving treatment. The automatic detection of stroke signs has been increasingly developed for practical use. The better timely classification results could allow better detection of the symptoms and avoid morbidity and mortality. In this study, we proposed using cosine similarity between the left and right sides of the face as a part of features for classifying the stroke elderly patients from healthy elderly participants. We employed our method on images from the Toronto NeuroFace dataset. The results showed high classification accuracy (the average accuracy of 97.8998% from 6 classification methods). These results indicate that the cosine similarity features can be useful to detect facial asymmetry and pose very promising potential for elderly stroke detection. © 2022 IEEE.

关键词： Patient treatment

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Interlayer sensitized van der Waals heterojunction photodetector with enhanced performance

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Nano Research 2023年第7期16卷 10537-10544页

作者： Huide Wang Yonghong Zeng FanXu Meng Rui Cao Yi Liu Zhinan Guo Tingting Wang Haiguo Hu Sidi Fan Yatao Yang SWageh Omar AAl-Hartomy Abul Kalam Yonghong Shao Yu-Jia Zeng Dianyuan Fan Han Zhang International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology Institute of Microscale OptoelectronicsInterdisciplinary Center of High Magnetic Field Physics of Shenzhen UniversityCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Guangzhou Key Laboratory of Sensing Materials and Devices Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China Center of Characterization and Analysis Jilin Institute of Chemical TechnologyJilin 132022China School of Mathematical&Physical Sciences Wuhan Textile UniversityWuhan 430200China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia

Although photodetection based on two-dimensional(2D)van der Waals(vdWs)P-N heterojunction has attracted extensive attention recently,their low responsivity(R)due to the lack of carrier gain mechanism in reverse bias or zero bias operation hinders their applications in advanced photodetection ***,a black phosphorus/rhodamine 6G/molybdenum disulfide(BP/R6G/MoS_(2))photodiode with high responsivity at reverse bias or zero bias has been achieved by using interfacial charge transfer of R6G molecules assembled between heterojunction *** formed vdWs interface achieves high performance photoresponse by efficiently separating the additional photogenerated electrons and holes generated by R6G *** devices sensitized by the dye molecule R6G exhibit enhanced photodetection performance without sacrificing the photoresponse *** them,the R increased by 14.8-20.4 times,and the specific detectivity(D^(*))increased by 24.9-34.4 *** strategy based on interlayer assembly of dye molecules proposed here may pave a new way for realizing high-performance photodetection based on 2D vdWs heterojunctions with high responsivity and fast response speed.

关键词： heterojunction photodetector interlayer sensitization charge transfer responsivity

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Corrigendum to "A novel oval-shaped coaxial ground heat exchanger for augmenting the performance of ground-coupled heat pumps: Transient heat transfer performance and multi-parameter optimization" [J. Build. Eng. (2023) 107781] (Journal of Building engineering (2023) 79, (S2352710223019617), (10.1016/***.2023.107781))

引用

Journal of Building engineering 2024年

作者： Rajeh, Taha Al-Kbodi, Basher Hassan Li, Yang Zhao, Jun Zayed, Mohamed E. Ministry of Education of China Tianjin300350 China Faculty of Engineering Thamar University PO Box 87246 Dhamar Yemen Interdisciplinary Research Center for Renewable Energy and Power Systems King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia Department of Mechanical Power Engineering Faculty of Engineering Tanta University Tanta31521 Egypt

The authors regret to inform that there is a correction in name of one of the corresponding authors in the current online version "Li Yang" to the name "Yang Li". The authors would like to apologiz...

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Herd: Using multiple, smaller LLMs to match the performances of proprietary, large LLMs via an intelligent composer

arXiv

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arXiv 2023年

作者： Hari, Surya Narayanan Liu, Rex Thomson, Matt Department of Biology and Biological Engineering California Institute of Technology United States California Institute of Technology United States Department of Biology and Biological Engineering Program in Computational and Neural Systems California Institute of Technology United States

Currently, over a thousand LLMs exist that are multi-purpose and are capable of performing real world tasks, including Q&A, text summarization, content generation, etc. However, accessibility, scale and reliability of free models prevents them from being widely deployed in everyday use cases. To address the first two issues of access and scale, organisations such as HuggingFace have created model repositories where users have uploaded model weights and quantized versions of models trained using different paradigms, as well as model cards describing their training process. While some models report performance on commonly used benchmarks, not all do, and interpreting the real world impact of trading off performance on a benchmark for model deployment cost, is unclear. Here, we show that a herd of open source models can match or exceed the performance of proprietary models via an intelligent router. We show that a Herd of open source models is able to match the accuracy of ChatGPT, despite being composed of models that are effectively 2.5x smaller. We show that in cases where GPT is not able to answer the query, Herd is able to identify a model that can, at least 40% of the time. © 2023, CC BY.

关键词： Open systems

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Slice-Fusion: Reducing False Positives in Liver Tumor Detection for Mask R-CNN

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IEEE/ACM Transactions on Computational Biology and Bioinformatics 2023年第5期20卷 3267-3277页

作者： Tu, Deng-Yao Lin, Peng-Chan Chou, Hsin-Hung Shen, Meng-Ru Hsieh, Sun-Yuan National Cheng Kung University Master Degree Program on Artificial Intelligence Tainan City70101 Taiwan National Cheng Kung University Institute of Medical Informatics Department of Oncology Department of Genomic Medicine National Cheng Kung University Hospital College of Medicine Department of Computer Science and Information Engineering Tainan City70101 Taiwan National Chi Nan University Department of Computer Science and Information Engineering Nantou County54561 Taiwan National Cheng Kung University Graduate Institute of Clinical Medicine Department of Obstetrics and Gynecology Department of Pharmacology National Cheng Kung University Hospital College of Medicine Tainan City70101 Taiwan National Cheng Kung University Institute of Medical Information Institute of Manufacturing Information and Systems Center for Innovative FinTech Business Models International Center for the Scientific Development of Shrimp Aquaculture Department of Computer Science and Information Engineering Tainan City70101 Taiwan

Automatic liver tumor detection from computed tomography (CT) makes clinical examinations more accurate. However, deep learning-based detection algorithms are characterized by high sensitivity and low precision, which hinders diagnosis given that false-positive tumors must first be identified and excluded. These false positives arise because detection models incorrectly identify partial volume artifacts as lesions, which in turn stems from the inability to learn the perihepatic structure from a global perspective. To overcome this limitation, we propose a novel slice-fusion method in which mining the global structural relationship between the tissues in the target CT slices and fusing the features of adjacent slices according to the importance of the tissues. Furthermore, we design a new network based on our slice-fusion method and Mask R-CNN detection model, called Pinpoint-Net. We evaluated proposed model on the Liver Tumor Segmentation Challenge (LiTS) dataset and our liver metastases dataset. Experiments demonstrated that our slice-fusion method not only enhance tumor detection ability via reducing the number of false-positive tumors smaller than 10mm, but also improve segmentation performance. Without bells and whistles, a single Pinpoint-Net showed outstanding performance in liver tumor detection and segmentation on LiTS test dataset compared with other state-of-the-art models. © 2004-2012 IEEE.

关键词： Tumors

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Shifting burdens: How delayed decarbonisation of road transport affects other sectoral emission reductions

arXiv

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arXiv 2025年

作者： Zeyen, Elisabeth Kalweit, Sina Victoria, Marta Brown, Tom Berlin Berlin10587 Germany Department of Mechanical and Production Engineering iCLIMATE Interdisciplinary Centre for Climate Change Aarhus University Aarhus8000 Denmark Department of Wind and Energy Systems Technical University of Denmark Elektrovej 325 Lyngby2800 Denmark

In 2022, fuel combustion in road transport accounted for approximately 21% (760 million tonnes) of CO2 emissions in the European Union (EU). Road transport is the only sector with rising emissions, with an increase of 24% compared to 1990. The EU initially aimed to ban new CO2-emitting cars by 2030 but has since delayed this target to 2035, underscoring the ongoing challenges in the push for rapid decarbonisation. The pace of decarbonisation in this sector will either ease or intensify the pressure on other sectors to stay within the EU’s carbon budget. This paper explores the effects of speeding up or slowing down the transition in road transport. We reveal that a slower decarbonisation path not only drives up system costs by 126 billion e/a (6%) but also demands more than a doubling of the CO2 price from 137 to 290 e/tCO2in 2030 to trigger decarbonisation in other sectors. On the flip side, accelerating the shift to cleaner transport proves to be the most cost-effective strategy, giving room for more gradual changes in the heating and industrial sectors, while reducing the reliance on carbon removal in later years. Earlier mandates than currently envisaged by the EU can avoid stranded assets and save up to 43 billion e/a compared to current policies. © 2025, CC BY.

关键词： Low emission

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Experimental optical properties explained by density functional theory of the natural red algae for dye-sensitized solar cells application

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Environmental Science and Pollution Research 2024年第23期31卷 33651-33662页

作者： Anoua, Rania Touhtouh, Samira El Jouad, Mohamed Hajjaji, Abdelowahed Bakasse, Mina Sahraoui, Bouchta Plóciennik, Przemyslaw Zawadzka, Anna Laboratory of Engineering Sciences for Energy National School of Applied Sciences of El Jadida BP El Jadida1166 Morocco Centre for Modern Interdisciplinary Technologies Nicolaus Copernicus University Wilenska 4 Toruń87-100 Poland Research Development and Innovation Laboratory Mundiapolis University Casablanca20180 Morocco Laboratory of Chemistry Organic Bioorganic and Environment Faculty of Science University Chouaib Doukkali El Jadida24000 Morocco University of Angers MOLTECH-Anjou UMR CNRS 6200 2 Bd. Lavoisier Angers Cedex 0149045 France Institute of Engineering and Technology Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University Grudziadzka 5 Torun87-100 Poland Department of Automatic and Measurement Systems Institute of Engineering and Technology Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University Grudziadzka 5 Toruń87-100 Poland

The present study investigates the usage of a novel natural dye derived from red algae of Morocco in dye-sensitized solar cells (DSSCs) for the first time. The main pigments responsible for sensitizing the semiconductor TiO2 coatings in the red algae were identified as phycoerythrin, carotenoid, and chlorophyll. The efficiency of a DSSC made from red algae was compared to that of a solar cell made from chlorophyll alone. The photovoltaic performance of the DSSC was evaluated through photocurrent density to photovoltage (J-V) characteristic analysis, and the efficiency was found to be 0.93%. To gain insights into its behavior, the absorbance and photoluminescence in a broad range were studied. Both absorbance and photoluminescence exhibited a broad-spectrum range. Additionally, electronic properties, such as HOMO, LUMO, energy gap, and chemical reactivity parameters, were studied using density functional theory (DFT) calculations. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Dye-sensitized solar cells

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