Micro-textured surfaces have improved the tribological performance of contact surfaces under lubricated conditions;however,not practiced due to manufacturing *** addition to simpler micro-pits or straight-trench type ...
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Micro-textured surfaces have improved the tribological performance of contact surfaces under lubricated conditions;however,not practiced due to manufacturing *** addition to simpler micro-pits or straight-trench type textures,sophisticated bioinspired textures on commercial radial ball bearings have been scarcely *** this work,Dendroaspis polylepis(Mamba snake)skin-type textures were fabricated on the inner race of FAG radial ball bearings using a nanosecond fiber laser *** the snake textures were primarily meant to enhance friction,the dimensions of the texture have been carefully chosen to improve the tribological performance under lubricated *** textured bearings were assembled and experimented at various rotational speeds and lightly loaded conditions to measure vibrational amplitude,frictional torque,and temperature *** to untextured(conventional)bearing,the snake-skin type textured bearings resulted in improved tribo-dynamic performance.
Recently, Japan has been facing various social issues, and to solve these problems, it is necessary to create a society where diverse people can live comfortably. To build such a society, appropriate support tailored ...
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Cardiovascular diseases(CVDs)are fatal chronic diseases,where electrocardiography(ECG)monitoring could be a prominent solution for early *** spite of available commercialized,multilead ECG devices,bulky formats,discon...
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Cardiovascular diseases(CVDs)are fatal chronic diseases,where electrocardiography(ECG)monitoring could be a prominent solution for early *** spite of available commercialized,multilead ECG devices,bulky formats,discontinuous monitoring,and no safety alarm system significantly limit their practical ***,we present a soft,and stretchable,three-lead ECG device allowing continuous monitoring and wireless transmission of ECG signals.A newly developed organohydrogel patch with a strong adhesive ability(~9.9 kPa)and higher conductivity(~6.5 kΩ)is applied for high-quality ECG signals *** a long operation duration(6.5 h)and wireless transmission distance(20.9 m),it could fulfill most of the daily *** learning algorithms and the graphical user interface are used for real-time ECG monitoring and cardiac abnormalities *** vibratory flexible actuator,which is triggered by cardiac abnormalities that need immediate medical treatment,is also integrated as a warning system for the *** a newly reported stretchable multi-lead ECG device for long-term ECG signal monitoring,there is a high potential for improving users'life quality with the high-risk population of CVDs.
Distractions can interfere with surgical tasks and may negatively impact task performance, surgery duration, and mood of surgical team members. A mixed-methods study was conducted to examine the prevalence and potenti...
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Collective cell migration plays a critical role in physiological and pathological processes such as development,wound healing,and *** studies have demonstrated how various types of chemical,mechanical,and electrical c...
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Collective cell migration plays a critical role in physiological and pathological processes such as development,wound healing,and *** studies have demonstrated how various types of chemical,mechanical,and electrical cues dictate the collective migratory behaviors of *** an acoustic cue can be advantageous because of its noninvasiveness and biocompatibility,cell migration in response to acoustic stimulation remains poorly *** this study,we developed a device that is able to apply surface acoustic waves to a cell culture substrate and investigated the effect of propagating acoustic waves on collective cell *** migration distance estimated at various wave intensities revealed that unidirectional cell migration was enhanced at a critical wave intensity and that it was suppressed as the intensity was further *** increased migration might be attributable to cell orientation alignment along the direction of the propagating wave,as characterized by nucleus *** actin bundles indicative of a high traction force were observed in cells subjected to propagating acoustic waves at the critical *** device and technique can be useful for regulating cellular functions associated with cell migration.
Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight....
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The present work discusses the development and control of an antagonistic shape memory alloy (SMA) springs actuated flexible tube manipulator (FTM) which demonstrated its capabilities in trajectory tracking applicatio...
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With the frequency of cardiovascular issues rising, the automated categorization analysis of electrocardiogram signals (ECG) has become important in the medical assessment of disorders. A convolutional neural network ...
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Bubbles and foams are ubiquitous in daily life and industrial *** their dynamic behaviors is of key importance for foam manufacturing processes in food packaging,cosmetics and *** bubbles are inherently fragile and tr...
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Bubbles and foams are ubiquitous in daily life and industrial *** their dynamic behaviors is of key importance for foam manufacturing processes in food packaging,cosmetics and *** bubbles are inherently fragile and transient;enhancing their robustness and shelf lives is an ongoing *** rupture can be attributed to liquid evaporation,thin film drainage and the nuclei of environmental *** by particle-stabilized interfaces in Pickering emulsions,armored bubbles and liquid marble,bubbles are protected by an enclosed particle-entrapping liquid thin film,and the resultant soft object is termed gas *** gas marble exhibits mechanical strength orders of magnitude higher than that of soap bubbles when subjected to overpressure and underpressure,owing to the compact particle monolayer straddling the surface liquid *** using a water-absorbent glycerol solution,the resulting gas marble can persist for 465 d in normal atmospheric *** particle-stabilizing approach not only has practical implications for foam manufacturing processes but also can inspire the new design and fabrication of functional biomaterials and biomedicines.
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