Slipping
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Acoustically powered surface-slipping mobile microrobots Open
Significance Untethered microrobots have significant applications in medical interventions such as targeted drug delivery. Here, we present an acoustically propelled microrobot that uses a fast and unidirectional surface-slipping locomotio…
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Earthquake Initiation From Laboratory Observations and Implications for Foreshocks Open
This paper reviews laboratory observations of earthquake initiation and describes new experiments on a 3‐m rock sample where the nucleation process is imaged in detail. Many of the laboratory observations are consistent with previous work …
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Mechanical properties of graphene Open
This paper reviews the mechanical properties of graphene with particular attention to what is established and what is still uncertain. It clarifies the thickness and the elastic constants, and by also considering also phonon frequencies, i…
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High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities Open
Establishing new energy-saving systems for gas separation using porous materials is indispensable for ensuring a sustainable future. Herein, we show that ELM-11 ([Cu(BF 4 ) 2 (4,4′-bipyridine) 2 ] n ), a member of flexible metal–organic fr…
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Slip Detection With a Biomimetic Tactile Sensor Open
Slip detection helps prevent robotic hands from dropping grasped objects and would thus enable complex object manipulation. Here we present a method of detecting slip with a biomimetic optical tactile sensor—the TacTip—that operates by mea…
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Experiments and Model for Serration Statistics in Low-Entropy, Medium-Entropy and High-Entropy Alloys Open
High-entropy alloys (HEAs) are new alloys that contain five or more elements in roughly-equal proportion. We present new experiments and theory on the deformation behavior of HEAs under slow stretching (straining) and observe differences, …
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A Review of Bolt Tightening Force Measurement and Loosening Detection Open
Pre-stressed bolted joints are widely used in civil structures and industries. The tightening force of a bolt is crucial to the reliability of the joint connection. Loosening or over-tightening of a bolt may lead to connectors slipping or …
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Bone fracture detection through the two-stage system of Crack-Sensitive Convolutional Neural Network Open
Automated fracture detection is an essential part in a computer-aided tele-medicine system. Fractures often occur in human's arbitrary bone due to accidental injuries such as slipping. In fact, many hospitals lack experienced surgeons to d…
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Electrohydrodynamics Near Hydrophobic Surfaces Open
We show that an electro-osmotic flow near the slippery hydrophobic surface depends strongly on the mobility of surface charges, which are balanced by counterions of the electrostatic diffuse layer. For a hydrophobic surface with immobile c…
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Permeability Evolution of Slowly Slipping Faults in Shale Reservoirs Open
Slow slip on preexisting faults during hydraulic fracturing is a process that significantly influences shale gas production in extremely low permeability “shale” (unconventional) reservoirs. We experimentally examined the impacts of minera…
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Active Convergence of the India‐Burma‐Sunda Plates Revealed by a New Continuous GPS Network Open
The Rakhine (Arakan)‐Bangladesh megathrust, along which the Indian and Burma plates collide, is assumed by some to be inactive/aseismic due to the lack of notable interplate earthquakes in the modern instrumental catalog. However, geologic…
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Human‐Like Electronic Skin‐Integrated Soft Robotic Hand Open
Human‐interactive soft robotic technologies have potential in numerous applications such as automatic home‐use robots, industrial systems, and Internet of Things (IoT) concepts. One approach to improve soft robotics is to integrate multipl…
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The experimental contact behaviour of natural sands: normal and tangential loading Open
A comprehensive series of tests was carried out using an innovative three-axis inter-particle loading apparatus, investigating the normal and shearing contact behaviour between sand particles of a variety of geological origins. The results…
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Learning Spatio Temporal Tactile Features with a ConvLSTM for the Direction Of Slip Detection Open
Robotic manipulators have to constantly deal with the complex task of detecting whether a grasp is stable or, in contrast, whether the grasped object is slipping. Recognising the type of slippage—translational, rotational—and its direction…
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Experimental Study on the Damage of Granite by Acoustic Emission after Cyclic Heating and Cooling with Circulating Water Open
Hot dry rock is developed by injecting cold water into high-temperature rock mass. At the same time, cold water is heated in contact with the rock mass. With the continuous influx of cold water, the surrounding rock will undergo a rapid co…
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Dynamic Locomotion on Slippery Ground Open
Dynamic locomotion on unstructured and uneven terrain is a challenging task in legged robotics. Especially when it comes to slippery ground conditions, common state estimation and control algorithms suffer from the usual no-slip assumption…
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Physical model test and numerical simulation on the failure mechanism of the roadway in layered soft rocks Open
To explore the failure mechanism of roadway in layered soft rocks, a physical model with the physically finite elemental slab assemblage (PFESA) method was established. Infrared thermography and a video camera were employed to capture ther…
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Real-Time Strap Pressure Sensor System for Powered Exoskeletons Open
Assistive and rehabilitative powered exoskeletons for spinal cord injury (SCI) and stroke subjects have recently reached the clinic. Proper tension and joint alignment are critical to ensuring safety. Challenges still exist in adjustment a…
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Shared and Task-Specific Muscle Synergies during Normal Walking and Slipping Open
Falling accidents are costly due to their prevalence in the workplace. Slipping has been known to be the main cause of falling. Understanding the motor response used to regain balance after slipping is crucial to developing intervention st…
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Effect of friction on axially loaded stub circular tubed columns Open
This article discusses the influence of bond and friction between the steel tube and concrete on composite response for circular tubed-reinforced-concrete short columns under axial compression. Thirteen large diameter-to-thickness ratio ( …
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Robust Continuous Wheel Slip Control With Reference Adaptation: Application to the Brake System With Decoupled Architecture Open
Modern and coming generations of electric and automated vehicles are characterized by higher requirements to robust and fault-tolerant operation of chassis systems independently from driving situations and road conditions. In this regard, …
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Shallow Creep Along the 1999 Izmit Earthquake Rupture (Turkey) From GPS and High Temporal Resolution Interferometric Synthetic Aperture Radar Data (2011–2017) Open
Characterizing the spatiotemporal evolution of creep is essential to constrain fault slip budget and understand creep mechanism. Studies based on interferometric synthetic aperture radar and Global Positioning System (GPS) satellite observ…
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A Cable-Driven Exosuit for Upper Limb Flexion Based on Fibres Compliance Open
Flexible soft exoskeletons, so-called exosuits, are robotic devices that interact with their users to assist or enhance muscle performance. Their lightweight design and lack of rigid parts allow assisting the user's natural motion without …
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Thermo-mechanical pressurization of experimental faults in cohesive rocks during seismic slip Open
Earthquakes occur because fault friction weakens with increasing slip and slip rates. Since the slipping zones of faults are often fluid-saturated, thermo-mechanical pressurization of pore fluids has been invoked as a mechanism responsible…
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Dynamic Ridges and Valleys in a Strike‐Slip Environment Open
Strike‐slip faults have long been known for characteristic near‐fault landforms such as offset rivers and strike‐parallel valleys. In this study, we use a landscape evolution model to investigate the longer‐term, catchment‐wide landscape r…
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Geomechanical modelling of sinkhole development using distinct elements: model verification for a single void space and application to the Dead Sea area Open
Mechanical and/or chemical removal of material from the subsurface may generate large subsurface cavities, the destabilisation of which can lead to ground collapse and the formation of sinkholes. Numerical simulation of the interaction of …
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Discrete Vibro-Tactile Feedback Prevents Object Slippage in Hand Prostheses More Intuitively Than Other Modalities Open
In the case of a hand amputation, the affected can use myoelectric prostheses to substitute the missing limb and regain motor functionality. Unfortunately, these prostheses do not restore sensory feedback, thus users are forced to rely on …
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A 220,000-year-long continuous large earthquake record on a slow-slipping plate boundary Open
A 220-ka-long M w ≥ 7.0 earthquake record reveals an unexpectedly high seismicity rate on a slow-slipping plate boundary.
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A New Exact Solution for the Flow of a Fluid through Porous Media for a Variety of Boundary Conditions Open
The viscous fluid flow past a semi-infinite porous solid, which is proportionally sheared at one boundary with the possibility of the fluid slipping according to Navier’s slip or second order slip, is considered here. Such an assumption ta…
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Mixed‐Mode Slip Behavior of the Altotiberina Low‐Angle Normal Fault System (Northern Apennines, Italy) through High‐Resolution Earthquake Locations and Repeating Events Open
We generated a 4.5‐year‐long (2010–2014) high‐resolution earthquake catalogue, composed of ~37,000 events with M L < 3.9 and M C = 0.5 completeness magnitude, to report on the seismic activity of the Altotiberina (ATF) low‐angle normal fau…