Results 71 to 80 of about 75,520 (349)

Experimental investigation on fracturing effects in hydraulic sand fracturing with acoustic emission and 3d laser scanning

open access: yesScientific Reports, 2023
Due to the extremely low permeability of shale reservoirs, large-scale reservoir fracturing is required. Hydraulic fracturing is one of the most important technologies in shale gas exploration and development.
Shuhui Zhang   +4 more
doaj   +1 more source

Independent Expert Scientific Panel – Report on Unconventional Oil and Gas [PDF]

open access: yes, 2014
No abstract ...
Curran, J.   +8 more
core   +1 more source

Autonomous Implants

open access: yesAdvanced Materials, EarlyView.
An ideal implant should mimic native tissues such that it can integrate, sense, heal, and continue to function, i.e., be autonomous. Although early, there are good steps taken in this way, e.g., the development of stimuli‐responsive, self‐powering, self‐actuating, self‐healing, self‐regenerating, and self‐aware implants.
Jagan Mohan Dodda   +5 more
wiley   +1 more source

PyFrac: A planar 3D hydraulic fracture simulator

open access: yes, 2020
Fluid driven fractures propagate in the upper earth crust either naturally or in response to engineered fluid injections. The quantitative prediction of their evolution is critical in order to better understand their dynamics as well as to optimize their
Lecampion, Brice, Zia, Haseeb
core   +1 more source

A Hydrophilic Hollow Microneedle Platform for Sampling Interstitial Fluid and On‐Site Biomarker Detection

open access: yesAdvanced Materials Technologies, EarlyView.
This study presents a superhydrophilic 3D‐printed hollow microneedle patch for continuous interstitial fluid (ISF) extraction and on‐patch biomarker sensing. Combining projection micro‐stereolithography and chemical vapor deposition, high‐resolution microneedles with enhanced wettability are fabricated, enabling passive ISF uptake without external ...
Taher Abbasiasl   +7 more
wiley   +1 more source

Influence of liquid-nitrogen freezing of gas-bearing shale rocks on their compressive strength [PDF]

open access: yes, 2018
Any definable relation between falling temperature and the compressive strength of shale rocks should provide a useful predictive tool aiding optimization of the results of hydraulic fracturing.
Jarosz, Kinga
core   +1 more source

3D Printing of Soft Robotic Systems: Advances in Fabrication Strategies and Future Trends

open access: yesAdvanced Robotics Research, EarlyView.
Collectively, this review systematically examines 3D‐printed soft robotics, encompassing material selections, function integration, and manufacturing methodologies. Meanwhile, fabrication strategies are analyzed in order of increasing complexity, highlighting persistent challenges with proposed solutions.
Changjiang Liu   +5 more
wiley   +1 more source

Investigation into Influences of Hydraulic Fracturing for Hard Rock Weakening in Underground Mines

open access: yesApplied Sciences
The long overhanging distance of hard roofs and long-collapse steps induces a large area of suspension on the working face in underground coal mines, resulting in excessive pressure and deformation on the surrounding rocks of the adjacent roadway in the ...
Xu Cao, Saisai Wu, Qingyuan He
doaj   +1 more source

On Hydraulic Fracturing of Tight Rock

open access: yes, 2021
Hydraulic fracturing is widely used in the modern oil and gas industry for stimulating petroleum reservoirs that have low permeability (<0.1 mD) at original reservoir conditions. Without hydraulic fracturing these reservoirs are impossible to be produced commercially.
openaire   +3 more sources

Dual‐Functional Ingestible Passive Capsules for High‐Throughput Intestinal Sampling with Sealed Containment and Targeted Drug Delivery

open access: yesAdvanced Robotics Research, EarlyView.
To address challenges in high‐throughput intestinal sampling with sealed containment and target drug delivery, we developed a dual‐functional ingestible passive capsule with a dual‐triggered control system based on pH‐response and mechanical actuation.
Libing Huang   +9 more
wiley   +1 more source

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