Results 101 to 110 of about 265 (205)

Optimisation of Flow Distribution for Pipe Pullback in Horizontal Directional Drilling

, 2019
Horizontal Directional Drilling permits the creation of tunnels which pass beneath rivers and canals to allow the passing of services from one side to the other. The final stage of this process involves lining the tunnel with a plastic or steel pipe. The
Saliba, Jonathan (author)
core  

A Steerable and Expandable Magnetic Aspiration Catheter for Enhanced Aspiration Thrombectomy

Advanced Intelligent Systems, EarlyView.
This article presents a novel magnetic aspiration catheter (MAC) that can be both actively steered and undergo distal‐end expansion via externally applied magnetic fields. The MAC facilitates precise branch selection and enhances clot engagement by improving endovascular navigation and aspiration efficiency. Phantom experiments validate its feasibility
Hakjoon Lee, Xiao Dong, Dong‐in Kim, A. M. Masum Bulbul Chowdhury, Nader Latifi Gharamaleki, Jin‐young Kim, Sung Won Youn, Hongsoo Choi   +7 more
wiley   +1 more source

Pre‐Curved Everting Robots With Embedded Steering Intelligence Fabricated by CO2 Laser Welding

Advanced Intelligent Systems, EarlyView.
Design and experimental demonstration of a laser welded growing robot for anatomically guided navigation. The robot follows an aortic arch phantom entering the branchiocephalic branch through steering by design. The figure shows the physical phantom setup, CAD defined weld geometry and full robot eversion.
Brandon Saldarriaga, Panagiotis Kalozoumis, Panagiotis Vartholomeos, Carlo Seneci, Kawal Rhode, Christos Bergeles   +5 more
wiley   +1 more source

Characteristics of pressure relief gas enrichment zones in overlying strata during high-strength mining based on elliptical-parabolic zone theory

Meitan kexue jishu
With the deepening and high-strength development of coal resource mining, gas issues and safety hazards in the mining process become increasingly prominent.
Haiqing SHUANG, Jiatao ZHANG, Shugang LI, Haifei LIN, Bin ZHOU, Peiyun XU, Pengxiang ZHAO, Peizhen ZHANG   +7 more
doaj   +1 more source

ANALISIS RISIKO KECELAKAAN KERJA PADA PEKERJAAN PEMASANGAN PIPA DENGAN METODE HORIZONTAL DIRECTIONAL DRILLING (HDD) PADA PEMBANGUNAN SPAM

Pembangunan Sistem Penyediaan Air Minum (SPAM) di Indonesia, sesuai dengan Peraturan Menteri Pekerjaan Umum dan Perumahan Rakyat No. 27 Tahun 2016, bertujuan untuk menyediakan air bersih yang berkualitas dan berkelanjutan bagi masyarakat. Karena padatnya
Azaria Andreas, Simanjuntak, Fransisca Ruthriana   +1 more
core   +1 more source

Directional Analysis of Stationary Point Processes [PDF]

, 2019
In this thesis we consider the directional analysis of stationary point processes. We focus on three non-parametric methods based on second order analysis which we have defined as Integral method, Ellipsoid method, and Projection method.
Sormani, Martina
core  

Study on stress evolution and damage fracture of cut blasting in high in-situ stress roadway

Meitan kexue jishu
In recent years, the mining state of mineral resources has changed from open air to underground and from shallow to deep. In the drilling and blasting construction of deep rock masses, in-situ stress has a significant impact on the blasting effect.
Chenxi DING, Xintong LIANG, Renshu YANG, Xiao GUO, Yang YANG, Jun ZHOU, Xinguang ZHU   +6 more
doaj   +1 more source

Development of Advanced Drilling, Completion, and Stimulation Systems for Minimum Formation Damage and Improved Efficiency: A Program Overview

, 1994
The Department of Energy`s (DOE) Natural Gas Resource and Extraction Program consists of industry/government co-sponsored research, development, and demonstration (RD&D) projects, which focus on gas recovery from both conventional and nonconventional ...
Layne, A. W., Yost, A. B., II
core  

Detection and management of coal seam outcrop fire in China: a case study

Scientific Reports
The outcrop fire area in Rujigou Coal Mine in Ningxia, China has been burning continuously for over 100 years. This not only results in wastage of resources but also poses significant damage to the ecological environment.
Yang Liu, Xuyao Qi, Dayong Luo, Yongqing Zhang, Jiangtao Qin   +4 more
doaj   +1 more source

Mechanism and quantitative traceability of anomalous outflow of unloaded gas from protective layer mining under complex tectonics

Meitan xuebao
Protective layer mining is an effective technical means for the prevention and control of gas disasters. The issue of abnormal water inrush during the mining process is a significant threat to the safe production of mines.
Xuexi CHEN, Xingyu CHEN, Jiaying HU, Aitao ZHOU, Jian XIAO, Jihong SUN, Zhilong YAN   +6 more
doaj   +1 more source