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An exploration of frictional and vibrational behaviors of textured deep groove ball bearing in the vicinity of requisite minimum load

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Friction 2021年第6期9卷 1749-1765页

作者： K.E.Ch.VIDYASAGAR R.K.PANDEY Dinesh KALYANASUNDARAM Center for Biomedical Engineering Indian Institute of Technology DelhiNew Delhi 110016India Department of Biomedical Engineering College of EngineeringOsmania UniversityTelangana 500007India Department of Mechanical Engineering Indian Institute of Technology DelhiNew Delhi 110016India Department of Biomedical Engineering Indian Institute of Technology DelhiNew Delhi 110016India

In case of lightly loaded radial ball bearings,failure mechanisms other than fatigue such as smearing of raceways due to increased frictional torque and vibrations often ***,attempts have been made herein for reducing the frictional torque and minimizing the vibrations of a radial deep groove ball bearing employing surface textures at the inner *** pulsed laser was used to create texture(involving micro-dimples having different dimple area density)on the inner race of test *** an in-house developed test rig,frictional torque and vibrational parameters were measured at different speeds and light loads(*** vicinity of 0.01C,where C is dynamic load capacity of radial ball bearing).Significant reduction in frictional torque and overall vibrations were found in the presence of micro-dimples on inner race at light loads irrespective of operating *** without satisfying the minimum load needed criteria for the satisfactory operation,substantial reduction in smearing marks was found on the races of textured ball bearings in comparison to conventional cases.

关键词： ball bearing textured inner race grease lubricated frictional torque vibration

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The role of artificial intelligence and IoT in prediction of earthquakes:Review

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Artificial Intelligence in Geosciences 2024年第1期5卷 154-172页

作者： Joshua Pwavodi Abdullahi Umar Ibrahim Pwadubashiyi Coston Pwavodi Fadi Al-Turjman Ali Mohand-Said Ecole et Observatoire des Sciences de La Terre ITES UMR7063-CNRS/Universit’e de Strasbourg5 rue Rene Descartes67084StrasbourgFrance Research Center for Science Technology and Engineering(BILTEM)Near East University99138NicosiaTRNCMersin 10Turkey Department of Biomedical Engineering Near East UniversityMersin 10Nicosia99010Turkey Department of Biomedical Engineering Faculty of EngineeringCyprus International UniversityHaspolatNorth Cyprus via Mersin 10Nicosia99258Turkey Artificial Intelligence Engineering Department AI and Robotics InstituteNear East UniversityMersin99138Turkey Research Center for AI and IoT Faculty of EngineeringUniversity of KyreniaMersin 99138Turkey

Earthquakes are classified as one of the most devastating natural disasters that can have catastrophic effects on the environment,lives,and *** has been an increasing interest in the prediction of earthquakes and in gaining a comprehensive understanding of the mechanisms that underlie their generation,yet earthquakes are the least predictable natural *** data,global positioning system,interferometry synthetic aperture radar(InSAR),and seismometers such as microelectromechanical system,seismometers,ocean bottom seismometers,and distributed acoustic sensing systems have all been used to predict earthquakes with a high degree of *** advances in seismic wave recording,storage,and analysis,earthquake time,location,and magnitude prediction remain *** the other hand,new developments in artificial intelligence(AI)and the Internet of Things(IoT)have shown promising potential to deliver more insights and ***,this article reviewed the use of AI-driven Models and IoT-based technologies for the prediction of earthquakes,the limitations of current approaches,and open research *** review discusses earthquake prediction setbacks due to insufficient data,inconsistencies,diversity of earthquake precursor signals,and the earth’s geophysical ***,this study examines potential approaches or solutions that scientists can employ to address the challenges they face in earthquake *** analysis is based on the successful application of AI and IoT in other fields.

关键词： Earthquakes Seismicity Artificial intelligence Internet of things Prediction

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Dynamic synthetic-scanning photoacoustic tracking monitors hepatic and renal clearance pathway of exogeneous probes in vivo

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Light(Science & Applications) 2024年第12期13卷 3181-3195页

作者： Jing Lv Hengrong Lan Aoji Qin Tong Sun Dan Shao Fei Gao Junjie Yao Kamran Avanaki Liming Nie Guangdong Cardiovascular Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Medical Research Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080China School of Biomedical Engineering Tsinghua UniversityBeijing 100084China Department of PET Center Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080China Hybrid Imaging System Laboratory School of Information Science and TechnologyShanghaiTech UniversityShanghai 201210China Department of Biomedical Engineering Duke UniversityDurhamNC 27708USA Richard and Loan Hill Department of Biomedical Engineering University of Illinois at ChicagoChicagoIL 60607USA

Advancements in precision medicine necessitate understanding drug clearance pathways,especially in organs like the liver and *** techniques such as PET/CT pose radiation hazards,whereas optical imaging poses challenges in maintaining both depth penetration and high ***,very few longitudinal studies have been performed for drug candidates for different *** non-ionizing photoacoustic tomography for deep tissue imaging,we developed a spatiotemporally resolved clearance pathway tracking(SRCPT)method,providing unprecedented insights into drug clearance dynamics within vital *** addresses challenges like laser fluence attenuation,enabling dynamic visualization of drug clearance pathways and essential parameter *** employed a novel frequency component selection based synthetic aperture focusing technique(FCSSAFT)with respiratory-artifacts-free weighting factors to enhance three-dimensional imaging *** by this,we investigated the clearance pathway of a clinical drug,mitoxantrone,revealing reduced liver clearance when hepatic function is ***,immunoglobulin G clearance analysis revealed significant differences among mice with varying renal injury *** accuracy of our method was validated using a double-labeled probe[68Ga]DFO-IRDye800CW,showing a strong positive correlation between SRCPT and *** believe that this powerful SRCPT promises precise mapping of drug clearance pathways and enhances diagnosis and treatment of liver and kidney-related diseases.

关键词： organs impaired synthetic

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Towards non-invasive biomarkers in colorectal cancer management: A study on integrating radiomics and deep learning-based image processing for tumor-stroma interaction 24

Towards non-invasive biomarkers in colorectal cancer managem...

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8th International Conference on Medical and Health Informatics, ICMHI 2024

作者： Adjei, Prince Ebenezer Otoo, Obed Kojo Yang, Jinlin Rao, Nini Department of Biomedical Engineering School of Life Science and Technology University of Electronic Science and Technology of China Chengdu China Biomedical Engineering Programme Kwame Nkrumah University of Science and Technology Ghana Digestive Endoscopic Center of West China Hospital Sichuan University China Department of Radiology Komfo Anokye Teaching Hospital Kumasi Ghana

ISBN: (纸本)9798400716874

Colorectal cancer (CRC) management, particularly for invasive histopathology analysis, has benefited from the prognostic insights the tumor-stroma ratio (TSR) provides. Despite advances in colonography, histopathology, and radiomics, the relationship between TSR and radiomic features still needs to be studied, given the potential non-invasive nature of radiomics biomarkers. This study explores the relationship between TSR and radiomics that can reduce the reliance on invasive biopsies in CRC management by identifying noninvasive radiomic-based markers. A retrospective analysis was conducted on radiology slides and corresponding histopathology slides from the colorectal cancer patients (n = 15) sourced from The Cancer Genomic Atlas (TCGA). A specialist radiologist manually segmented the tumors, and radiomic feature extraction was performed on radiology slides. A pre-trained vision transformer model characterized pathology slides. Using a tile-based approach, each tile was classified into one of nine distinct classes, resulting in a complete characterization of the entire slide. TSR was estimated as the stroma ratio to tumor area on pathology slides. Statistical correlation analysis and machine learning algorithms were employed to find associations between TSR and radiomic features, including feature importance assessment. Our findings indicate a significant correlation between specific gray-level measurement features and TSR, suggesting the potential of these radiomic features as noninvasive prognostic indicators. In summary, the interaction between radiomics and tumor-stroma ratio (TSR) presents potential opportunities for improving colorectal cancer (CRC) prognosis, treatment decision-making, and patient stratification. © 2024 ACM.

关键词： Noninvasive medical procedures

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Flexible adaptive sensing tonometry for medical-grade multi-parametric hemodynamic monitoring

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npj Flexible Electronics 2024年第1期8卷 437-452页

作者： Mengkang Deng Chentao Du Jiayuan Fang Changshun Xu Chenhui Guo Jiantao Huang Kang Li Lei Chen Yuan-Ting Zhang Yu Chang Tingrui Pan School of Biomedical Engineering Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiPR China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhouPR China Department of Biomedical Engineering City University of Hong KongHong Kong SARPR China West China Biomedical Big Data Center West China HospitalSichuan UniversityChengduPR China Department of Neurology West China HospitalSichuan UniversityChengduPR China Hong Kong Institute of Medical Engineering Chinese University of Hong Kong(CUHK)Hong Kong SARPR China Department of Electronic Engineering Chinese University of Hong Kong(CUHK)Hong Kong SARPR China Bionic Sensing and Intelligence Center(BSIC) Institute of Biomedical and Health EngineeringShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenPR China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefeiPR China

Continuous hemodynamic monitoring in a wearable means can play a crucial role in managing hypertension and preventing catastrophic cardiovascular *** this study,we have described the fully wearable tonometric device,referred to as flexible adaptive sensing tonometry(FAST),which is capable of continuous and accurate monitoring of hemodynamic parameters within the medical-grade *** particular,the FAST system integrates a 1×8 unit array of highly sensitive and highly flexible iontronic sensing(FITS)with 1mm spatial resolution and a closed-loop motion *** flexible tonometric architecture has been used to determine the radial arterial position with high sensitivity and high conformability,which simplifies the biaxial searching process of the traditional applanation tonometry into a highly efficient uniaxial applanation while keeping the medical-precision ***,a self-calibration algorithm can be automatically implemented during the applanation process,from which the intra-arterial blood pressure wave can be continuously predicted within the medical-grade precision,and subsequently,multi-parametric hemodynamic analysis can be performed in *** validations on health volunteers have demonstrated that the FAST measurements are all within the required accuracy of the clinical standards for continuous pulse wave assessments,blood pressure monitoring as well as other key hemodynamic parameter ***,the FAST system,by integrating the flexible iontronic sensing array,provides a real-time,medical-grade hemodynamicmonitoring solution in a continuously wearable manner,from which remote patient-centered monitoring can be delivered with both medical precision and convenience.

关键词： parametric continuously monitoring

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In-situ fabrication of manganese ferrite grafted polyaniline nanocomposite: A magnetically reusable visible light photocatalyst and a robust electrode material for supercapacitor

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Journal of Colloid and Interface Science 2023年 642卷 584-594页

作者： Somasundaram, Annette Jayam Xiao, Huifang Pandiyarajan, Sabarison Liao, Ai-Ho Lydia, Sharmila Chuang, Ho-Chiao Tamil Nadu Tiruchirappalli India School of Mechanical Engineering University of Science and Technology Beijing Beijing100083 China Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei106344 Taiwan Department of Mechanical Engineering National Taipei University of Technology Taipei106344 Taiwan Graduate Institute of Biomedical Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Department of Biomedical Engineering National Defense Medical Center Taipei114201 Taiwan

Herein, we reported the in-situ preparation of manganese ferrite (MnFe2O4) grafted polyaniline (Pani), a magnetic nanocomposite for the potential visible light photocatalytic material as well as electrode material for supercapacitor. The physical characterization of the prepared nanoparticle and nanocomposite was examined with various spectroscopic and microscopic analyses. The peaks observed in the X-ray diffraction study confirm the face-centered cubic phase of MnFe2O4 nanoparticles with a grain size of ∼17.6 nm. The surface morphology analysis revealed the uniform distribution of spherical-like MnFe2O4 nanoparticles on the surface of Pani. The degradation of malachite green (MG) dye under exposure to visible light was investigated using MnFe2O4/Pani nanocomposite as a photocatalyst. The results exposed the faster degradation of MG dye was accomplished by MnFe2O4/Pani nanocomposite than MnFe2O4 nanoparticles. The energy storage performance of the MnFe2O4/Pani nanocomposite was analyzed through cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy analyses. The results exposed that the MnFe2O4/Pani electrode achieved a capacitance of 287.1 F/g than the MnFe2O4 electrode (94.55 F/g). Further, the respectable capacitance of 96.92% was achieved even after 3000 repetitive cycles stability. Based on the outcomes, the MnFe2O4/Pani nanocomposite can be suggested as a promising material for both photocatalytic and supercapacitor applications. © 2023 Elsevier Inc.

关键词： Iron compounds

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Color image restoration by filtering methods: a review

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Soft Computing 2024年第13-14期28卷 7755-7782页

作者： Salamat, Nadeem Missen, Malik Muhammad Saad Akhtar, Nadeem Mustahsan, Muhammad Surya Prasath, V.B. Department of Mathematics Khawaja Fareed University of Engineering and Information Technology Rahim Yar Khan64200 Pakistan Department of Computer Science and IT The Islamia University of Bahawalpur Bahawalpur63100 Pakistan Division of Biomedical Informatics Cincinnati Children’s Hospital Medical Center CincinnatiOH45229 United States Department of Computer Science Pediatrics and Biomedical Informatics University of Cincinnati CincinnatiOH45221 United States

Digital images are corrupted with noise, and image denoising is an important step in image processing modules. In this review, the latest developments in filtering methods for color image restoration are analyzed. These algorithms are compared in terms of objective image quality measures and divided into major classes, such as spatial domain, switching and wavelet filtering methods. These classes are based on the particular methodology used in image denoising algorithms and further subdivided to show their classification in terms of noise models utilized, application style, and stages the filters applied in images. In particular, we present a review of filtering methods in color image denoising, published over the past two decades. Our classification and succinct descriptions of color image restoration by these mathematical filtering techniques and their characterizations can help choose the appropriate ones for various downstream image processing tasks. © The Author(s) 2024.

关键词： Restoration

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Characterization of refractive index of polydimethylsiloxane and titanium dioxide particles composite for tissue phantom application in 0.2-0.5 THz range

Characterization of refractive index of polydimethylsiloxane...

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2024 International Conference on Photonics Solutions, ICPS 2024

作者： Panthinuan, Kittipong Mankong, Ukrit Udomsom, Suruk Nakprasert, Sitthichok Sangngam, Pakorn Inagaki, Keizo Akahane, Kouichi Biomedical Engineering Institute Chiang Mai University Chiang Mai Thailand Biomedical Engineering and Innovation Research Center Chiang Mai University Chiang Mai Thailand Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand National Institute of Information and Communications Technology Tokyo Japan

ISBN: (数字)9781510688308

ISBN: (纸本)9781510688292

In this work, we have proposed and characterized composite materials with adjustable refractive indices for tissue phantom application in sub-terahertz frequencies, in the range 0.2-0.5 THz. The composite materials consist of polydimethylsiloxane (PDMS) and titanium dioxide (TiO2). The refractive index change was achieved by varying the volume fraction of TiO2 micro particles. The results showed that it is possible to achieve the refractive index values in the range 2.0-2.5 for skin and muscle phantoms and 1.6 for fat phantoms with respect to the designed values. The polymer composite is a more durable alternative to the phantoms made from water-based materials. © 2025 SPIE.

关键词： Polydimethylsiloxane

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Harnessing cytokine-induced killer cells to accelerate diabetic wound healing:an approach to regulating post-traumatic inflammation

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Regenerative Biomaterials 2024年第2期3卷 88-99页

作者： Yixi Yang Cheng Zhang Yuan Jiang Yijun He iawei Cai Lin Liang Zhaohuan Chen Sicheng Pan Chu Hua Keke Wu Le Wang Zhiyong Zhang Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University Guangdong Province Engineering Research Center for Biomedical EngineeringState Key Laboratory of Respiratory DiseaseDepartment of Orthopaedic SurgeryMedical Technology and Related Equipment Research for Spinal Injury TreatmentCity Key LaboratoryThe Third Affliated Hospital of Guangzhou Medical UniversitySchool of Biomedical EngineeringGuangzhou MedicalUniversityGuangzhouGuangdong510150P.R.China Department of Osteoarthropathy and Sports Medicine Panyu Central HospitalGuangzhou 511400P.R.China

Impaired immunohomeostasis in diabetic wounds prolongs infiammation and cytokine dysfunction,thus,delaying or pre-venting wound-surface *** clinical studies have been conducted on cytokine-induced killer(CIK)cells recently,as they can be easily proliferated using a straightforward,inex-pensive ***,the function of CIK cells in regulat-ing inflammatory environments has been drawing attention for clinical *** the current investigation,we discovered the regenerative capacity of these cells in the chal-lenging environment of wounds that heal poorly due to *** demonstrated that the intravenous injection of CIK cells can re-establish a proregenerative inflammatory *** *** accelerateskin healing in diabetic *** results indicated that CIK cell treatment affects macrophage polarization and restores the function regenerative cells under hyperglycemic *** novel cellular therapy offers a promising intervention for clinical applic tions through specific inflammatory regulation functions.

关键词： macrophage diabetic wound post-traumatic inflammation cytokine-induced killer cells vascularization

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Thirty years of Ca2+ spark research: digital principle of cell signaling unveiled

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Biophysics Reports 2024年第5期10卷 259-265页

作者： Fujian Lu Pengcheng Yang Donghui Zhang Xianhua Wang Heping Cheng Department of Cardiology Zhongshan Hospital Institutes of Biomedical Sciences Fudan University Shanghai Institute of Cardiovascular Diseases State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life Science Hubei University National Biomedical Imaging Center State Key Laboratory of Membrane Biology Peking-Tsinghua Center for Life Sciences College of Future Technology Peking University

Calcium ions(Ca2+) are an archetypical and most versatile second messenger in virtually all cell *** by the discovery of Ca2+sparks in the 1990s,vibrant research over the last three decades has unveiled a constellation of Ca2+microdomains as elementary events of Ca2+signaling and,more importantly,a digital-analog dualism as the system design principle of Ca2+*** this brief review,we present a sketchy summary on advances in the field of sparkology,and discuss how the digital subsystem can fulfill physiological roles otherwise impossible for any analog *** addition,we attempt to address how the digital-analog dualism endows the simple cation messenger with signaling speediness,specificity,efficiency,stability,and unparalleled versatility.

关键词： Ca2+ signaling Ca2+ microdomain Digital system design

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