keyword
https://read.qxmd.com/read/38536681/eisatc-fusion-inception-self-attention-temporal-convolutional-network-fusion-for-motor-imagery-eeg-decoding
#21
JOURNAL ARTICLE
Guangjin Liang, Dianguo Cao, Jinqiang Wang, Zhongcai Zhang, Yuqiang Wu
The motor imagery brain-computer interface (MI-BCI) based on electroencephalography (EEG) is a widely used human-machine interface paradigm. However, due to the non-stationarity and individual differences among subjects in EEG signals, the decoding accuracy is limited, affecting the application of the MI-BCI. In this paper, we propose the EISATC-Fusion model for MI EEG decoding, consisting of inception block, multi-head self-attention (MSA), temporal convolutional network (TCN), and layer fusion. Specifically, we design a DS Inception block to extract multi-scale frequency band information...
March 27, 2024: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://read.qxmd.com/read/38536680/lower-limb-exoskeletons-appeal-to-both-clinicians-and-older-adults-especially-for-fall-prevention-and-joint-pain-reduction
#22
JOURNAL ARTICLE
Michael Raitor, Sandra Ruggles, Scott L Delp, C Karen Liu, Steven H Collins
Exoskeletons are a burgeoning technology with many possible applications to improve human life; focusing the effort of exoskeleton research and development on the most important features is essential for facilitating adoption and maximizing positive societal impact. To identify important focus areas for exoskeleton research and development, we conducted a survey with 154 potential users (older adults) and another survey with 152 clinicians. The surveys were conducted online and to ensure a consistent concept of an exoskeleton across respondents, an image of a hip exoskeleton was shown during exoskeleton-related prompts...
March 27, 2024: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://read.qxmd.com/read/38536678/dynamic-peripheral-hemoperfusion-distribution-monitoring-based-on-janus-flexible-sensor-system
#23
JOURNAL ARTICLE
Chenxiao Huang, Ouyang He, Zhechen Lao, Hanhao Liu, Yanlong Leng, Xuanhao Xu, Shuai Tian, Yawei Wang, Guifu Wu, Ruya Li, Yubo Fan
OBJECTIVE: Peripheral vascular disease is a worldwide leading health concern. Real-time peripheral hemoperfusion monitoring during treatment is essential to plan treatment strategies to improve circulatory enhancement effects. METHODS: The present work establishes a Janus flexible perfusion (JFP) sensor system for dynamic peripheral hemoperfusion monitoring. We develop a Janus structure design with different Young's modulus to improve the mechanical properties for motion artifacts suppression...
March 27, 2024: IEEE Transactions on Bio-medical Engineering
https://read.qxmd.com/read/38536677/simple-inverse-kinematics-computation-considering-joint-motion-efficiency
#24
JOURNAL ARTICLE
Ansei Yonezawa, Heisei Yonezawa, Itsuro Kajiwara
Inverse kinematics (IK) is an important and challenging problem in the operation of industrial manipulators. This study proposes a simple IK calculation scheme for an industrial serial manipulator. The proposed technique can calculate appropriate values of the joint variables to realize the desired end-effector position and orientation while considering the motion costs of each joint. Two scalar functions are defined for the joint variables: one is to evaluate the end-effector position and orientation, whereas the other is to evaluate the motion efficiency of the joints...
March 27, 2024: IEEE Transactions on Cybernetics
https://read.qxmd.com/read/38536670/tyrosinase-modified-uhmw-selp-polymers-as-wet-and-underwater-adhesives-to-achieve-multi-interface-adhesion
#25
JOURNAL ARTICLE
Wenxin Huang, Sijia Wang, Zhaoxuan Feng, Dasen Zhou, Wenqin Bai
The presence of a hydration layer in humid and underwater environments challenges adhesive-substrate interactions and prevents effective bonding, which has become a significant obstacle to the development of adhesives in the industrial and biomedical fields. In this study, ultrahigh-molecular-weight (UHMW) silk-elastin-like proteins (SELP) with 3,4-dihydroxyphenylalanine (DOPA) converted from tyrosine residues by tyrosinase exhibited excellent adhesive properties on different interfaces, such as glass, aluminum, wood, polypropylene sheets, and pigskin, under both dry and wet conditions...
March 27, 2024: ACS Synthetic Biology
https://read.qxmd.com/read/38536632/estimation-of-organ-and-effective-doses-of-cbct-scans-of-radiotherapy-using-size-specific-field-of-view-fov-a-monte-carlo-study
#26
JOURNAL ARTICLE
Abdullah Abuhaimed, Huda Mujammami, Khaled AlEnazi, Ahmed Abanomy, Yazeed Alashban, Colin J Martin
The kV cone beam computed tomography (CBCT) is one of the most common imaging modalities used for image-guided radiation therapy (IGRT) procedures. Additional doses are delivered to patients, thus assessment and optimization of the imaging doses should be taken into consideration. This study aimed to investigate the influence of using fixed and patient-specific FOVs on the patient dose. Monte Carlo simulations were performed to simulate kV beams of the imaging system integrated into Truebeam linear accelerator using BEAMnrc code...
March 27, 2024: Physical and engineering sciences in medicine
https://read.qxmd.com/read/38536580/impact-of-harmonization-on-the-reproducibility-of-mri-radiomic-features-when-using-different-scanners-acquisition-parameters-and-image-pre-processing-techniques-a-phantom-study
#27
JOURNAL ARTICLE
Ghasem Hajianfar, Seyyed Ali Hosseini, Sara Bagherieh, Mehrdad Oveisi, Isaac Shiri, Habib Zaidi
This study investigated the impact of ComBat harmonization on the reproducibility of radiomic features extracted from magnetic resonance images (MRI) acquired on different scanners, using various data acquisition parameters and multiple image pre-processing techniques using a dedicated MRI phantom. Four scanners were used to acquire an MRI of a nonanatomic phantom as part of the TCIA RIDER database. In fast spin-echo inversion recovery (IR) sequences, several inversion durations were employed, including 50, 100, 250, 500, 750, 1000, 1500, 2000, 2500, and 3000 ms...
March 27, 2024: Medical & Biological Engineering & Computing
https://read.qxmd.com/read/38536560/estimation-of-angle-parameters-by-asoct-and-biometric-parameters-by-optical-biometer-in-eyes-with-occludable-angles-and-open-angles
#28
JOURNAL ARTICLE
Pragati Tiwari, Amit Raj, Prateek Nishant
PURPOSE: To compare anterior chamber angle (ACA) parameters measured by Anterior Segment Optical Coherence Tomography (ASOCT) and biometric parameters measured by Swept-Source (SS) OCT-based biometry among patients with suspected occludable angles and open angles. METHODS: An analytical, cross-sectional study was performed on subjects attending our ophthalmology outpatient department with suspected occludable angles (van Herick grades 0, 1, and 2) in group 1, and with open angles (van Herick grades 3 and 4) in group 2...
March 27, 2024: International Ophthalmology
https://read.qxmd.com/read/38536551/theoretical-investigation-on-the-solid-liquid-phase-transition-of-gallium-through-free-energy-analysis
#29
JOURNAL ARTICLE
Anuj Debnath, Chandan K Das
CONTEXT: Gallium, renowned for its notably low melting point and unique property of becoming liquid at room temperature, is a valuable constituent in phase change materials. In this study, we investigate the solid-liquid phase transition of gallium using the modified embedded atom method (MEAM) potential. It addresses the technique to compute the free energy difference between the solid and liquid without using a reference state. We examine various thermodynamic and dynamic properties, including density, specific heat capacity, diffusivity, and radial distribution functions...
March 27, 2024: Journal of Molecular Modeling
https://read.qxmd.com/read/38536486/technology-and-the-situationist-challenge-to-virtue-ethics
#30
JOURNAL ARTICLE
Fabio Tollon
In this paper, I introduce a "promises and perils" framework for understanding the "soft" impacts of emerging technology, and argue for a eudaimonic conception of well-being. This eudaimonic conception of well-being, however, presupposes that we have something like stable character traits. I therefore defend this view from the "situationist challenge" and show that instead of viewing this challenge as a threat to well-being, we can incorporate it into how we think about living well with technology. Human beings are susceptible to situational influences and are often unaware of the ways that their social and technological environment influence not only their ability to do well, but even their ability to know whether they are doing well...
March 27, 2024: Science and Engineering Ethics
https://read.qxmd.com/read/38536485/green-synthesis-of-copper-nanoparticles-by-using-pineapple-peel-waste-in-vitro-characterizations-and-antibacterial-potential
#31
JOURNAL ARTICLE
Sanchita Mitra, Tarun Kumar Dua, Serina Easmin, Sucheta Sarkar, Arijit Prosad Roy, Ranabir Sahu, Gouranga Nandi, Md Salman Haydar, Swarnendu Roy, Paramita Paul
A considerable amount of fruit waste is being produced every day worldwide. The green synthesis of metal nanoparticles from fruit peel waste can be an innovative, cost-effective, and eco-friendly alternative to traditional methods. Copper nanoparticles (CuNPs) were synthesized by a green method using the pineapple peels extract (PLX) and copper sulfate pentahydrate. The formation of CuNPs was visually identified and detected by UV-Visible spectroscopy. The CuNPs were characterized by Fourier-transform infrared (FTIR) spectroscopy, particle size analyzer, scanning electron microscopy (SEM), and X-ray diffraction (XRD)...
March 27, 2024: Bioprocess and Biosystems Engineering
https://read.qxmd.com/read/38536484/kinetic-modeling-and-optimization-of-the-mono-and-diglycerides-synthesis-mediated-by-the-lipase-lipozyme%C3%A2-tl-100-l-immobilized-on-clayey-support
#32
JOURNAL ARTICLE
George F Finco, Edson A da Silva, Fernando Palú, Márcia R F Klen, Karina G Fiametti, João H C Wancura, J Vladimir Oliveira
Mono- and diglycerides play a crucial role in the food industry as multifunctional food additives and emulsifiers. Their importance stems from their unique properties, which allow them to improve the quality, texture, and stability of various food products. Here, results of the kinetic modeling of the mono- and diglycerides synthesis mediated by the lipase Lipozyme® TL 100 L immobilized on the clayey support Spectrogel® type C are reported. The support was characterized by TEM, SEM, and FTIR. Firstly, the influence of pH and lipase load on the immobilization process was analyzed, resulting in an enzymatic activity of 93...
March 27, 2024: Bioprocess and Biosystems Engineering
https://read.qxmd.com/read/38536408/building-synthetic-biosensors-using-red-blood-cell-proteins
#33
JOURNAL ARTICLE
Taylor B Dolberg, Taylor F Gunnels, Te Ling, Kelly A Sarnese, John D Crispino, Joshua N Leonard
As the use of engineered cell therapies expands from pioneering efforts in cancer immunotherapy to other applications, an attractive but less explored approach is the use of engineered red blood cells (RBCs). Compared to other cells, RBCs have a very long circulation time and reside in the blood compartment, so they could be ideally suited for applications as sentinel cells that enable in situ sensing and diagnostics. However, we largely lack tools for converting RBCs into biosensors. A unique challenge is that RBCs remodel their membranes during maturation, shedding many membrane components, suggesting that an RBC-specific approach may be needed...
March 27, 2024: ACS Synthetic Biology
https://read.qxmd.com/read/38536212/interphase-engineering-via-solvent-molecule-chemistry-for-stable-lithium-metal-batteries
#34
JOURNAL ARTICLE
Jiahang Chen, Huichao Lu, Xirui Kong, Jian Liu, Jiqiong Liu, Jun Yang, Yanna Nuli, Jiulin Wang
Lithium metal battery has been regarded as promising next-generation battery system aiming for higher energy density. However, the lithium metal anode suffers severe side-reaction and dendrite issues. Its electrochemical performance is significantly depended on the electrolyte components and solvation structure. Herein, a series of fluorinated ethers are synthesized with weak-solvation ability owing to the duple steric effect derived from the designed longer carbon chain and methine group. The electrolyte solvation structure rich in AGGs (97...
March 27, 2024: Angewandte Chemie
https://read.qxmd.com/read/38536054/recent-advances-in-the-interfacial-engineering-of-mof-based-mixed-matrix-membranes-for-gas-separation
#35
REVIEW
Shuwen Yu, Conger Li, Shuke Zhao, Milton Chai, Jingwei Hou, Rijia Lin
The membrane process stands as a promising and transformative technology for efficient gas separation due to its high energy efficiency, operational simplicity, low environmental impact, and easy up-and-down scaling. Metal-organic framework (MOF)-polymer mixed matrix membranes (MMMs) combine MOFs' superior gas-separation performance with polymers' processing versatility, offering the opportunity to address the limitations of pure polymer or inorganic membranes for large-scale integration. However, the incompatibility between the rigid MOFs and flexible polymer chains poses a challenge in MOF MMM fabrication, which can cause issues such as MOF agglomeration, sedimentation, and interfacial defects, substantially weakening membrane separation efficiency and mechanical properties, particularly gas separation...
March 27, 2024: Nanoscale
https://read.qxmd.com/read/38535993/modulating-the-ferroelectric-phases-in-cholesteryl-based-organic-compounds-with-perfluoroalkyl-tail-engineering
#36
JOURNAL ARTICLE
Huan-Huan Jiang, Nan Zhang, Wei-Xin Mao, Jin-Fei Lan, Long-Xing Zhou, Hua-Ming Xu, Han-Yue Zhang, Wei-Qiang Liao
Here, we synthesized a series of cholesteryl-based compounds, whose phases and their transformation can be modulated by temperature and the chain length of the fluoroalkyl moieties. To our knowledge, this is the first time that the phase transition could be modulated with perfluoroalkyl tail engineering in organic single-component ferroelectric crystals.
March 27, 2024: Chemical Communications: Chem Comm
https://read.qxmd.com/read/38535701/exploring-the-application-of-graphene-oxide-based-nanomaterials-in-the-repair-of-osteoporotic-fractures
#37
REVIEW
Hongfa Zhou, Jinyuan Chen, Xuan Zhang, JingJing Chen, Jiayou Chen, Shicheng Jia, Deli Wang, Hui Zeng, Jian Weng, Fei Yu
Osteoporotic fractures are induced by osteoporosis, which may lead to the degradation of bone tissues and microstructures and impair their healing ability. Conventional internal fixation therapies are ineffective in the treatment of osteoporotic fractures. Hence, developing tissue engineering materials is crucial for repairing osteoporotic fractures. It has been demonstrated that nanomaterials, particularly graphene oxide (GO), possess unique advantages in tissue engineering due to their excellent biocompatibility, mechanical properties, and osteoinductive abilities...
March 21, 2024: Nanomaterials
https://read.qxmd.com/read/38535679/biomimetic-scaffolds-a-novel-approach-to-three-dimensional-cell-culture-techniques-for-potential-implementation-in-tissue-engineering
#38
REVIEW
Tomasz Górnicki, Jakub Lambrinow, Afsaneh Golkar-Narenji, Krzysztof Data, Dominika Domagała, Julia Niebora, Maryam Farzaneh, Paul Mozdziak, Maciej Zabel, Paweł Antosik, Dorota Bukowska, Kornel Ratajczak, Marzenna Podhorska-Okołów, Piotr Dzięgiel, Bartosz Kempisty
Biomimetic scaffolds imitate native tissue and can take a multidimensional form. They are biocompatible and can influence cellular metabolism, making them attractive bioengineering platforms. The use of biomimetic scaffolds adds complexity to traditional cell cultivation methods. The most commonly used technique involves cultivating cells on a flat surface in a two-dimensional format due to its simplicity. A three-dimensional (3D) format can provide a microenvironment for surrounding cells. There are two main techniques for obtaining 3D structures based on the presence of scaffolding...
March 16, 2024: Nanomaterials
https://read.qxmd.com/read/38535490/the-genotoxicity-of-organic-extracts-from-particulate-emissions-produced-by-neat-gasoline-e0-and-a-gasoline-ethanol-blend-e15-in-beas-2b-cells
#39
JOURNAL ARTICLE
Helena Libalova, Tana Zavodna, Fatima Elzeinova, Hana Barosova, Tereza Cervena, Alena Milcova, Jolana Vankova, Foteini Paradeisi, Michal Vojtisek-Lom, Jitka Sikorova, Jan Topinka, Pavel Rossner
Emissions from modern gasoline engines represent an environmental and health risk. In this study, we aimed to compare the toxicity of organic compound mixtures extracted from particulate matter (PM extracts) produced by neat gasoline (E0) and a blend containing 15% ethanol (E15), which is offered as an alternative to non-renewable fossil fuels. Human lung BEAS-2B cells were exposed to PM extracts, and biomarkers of genotoxicity, such as DNA damage evaluated by comet assay, micronuclei formation, levels of phosphorylated histone H2AX, the expression of genes relevant to the DNA damage response, and exposure to polycyclic aromatic hydrocarbons (PAHs), were determined...
December 21, 2023: Journal of Xenobiotics
https://read.qxmd.com/read/38535272/advancements-in-biomedical-applications-of-calcium-phosphate-glass-and-glass-based-devices-a-review
#40
REVIEW
Jawad T Pandayil, Nadia G Boetti, Davide Janner
Calcium phosphate (CaP) glass has recently gained popularity as a promising material for a wide range of biomedical applications. Recent developments have seen CaP glasses moving from a passive implant material to an active degradable material, particularly as a major constituent of bioresorbable photonic devices. This holds great promise in advanced biomedical applications, since the main constituents of CaP glasses are present in the human body. In this review, the progressive advancements in the biomedical applications of calcium phosphate glass-based devices over the past 50 years are discussed...
March 21, 2024: Journal of Functional Biomaterials
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