Results 51 to 60 of about 193,780 (356)

Aspects of energy requirements for rock drilling [PDF]

, 1974
Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core  

Comparing the Effect of Semi‐Immersive Virtual Reality, Computerized Cognitive Training, and Traditional Rehabilitation on Cognitive Function in Multiple Sclerosis: A Randomized Clinical Trial

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Cognitive impairment is a common non‐motor symptom in Multiple Sclerosis (MS), negatively affecting autonomy and Quality of Life (QoL). Innovative rehabilitation strategies, such as semi‐immersive virtual reality (VR) and computerized cognitive training (CCT), may offer advantages over traditional cognitive rehabilitation (TCR ...
Maria Grazia Maggio, Desiree Latella, Lilla Bonanno, Paulo Cezar Rocha dos Santos, Marcos Maldonado‐Díaz, Meir Plotnik, Rosaria De Luca, Angelo Quartarone, Rocco Salvatore Calabrò   +8 more
wiley   +1 more source

Experimental Study on the Hole-Forming Process at the Borehole Bottom During Hot Water Drilling in Ice and Its Influence Mechanisms

Journal of Marine Science and Engineering
Hot water drilling is a drilling method that employs high-temperature and high-pressure hot water jetting to achieve ice melting drilling. Characterized by rapid drilling speed and large hole diameter, it is widely used for drilling observation holes in ...
Zhipeng Deng, Youhong Sun, Xiaopeng Fan, Pavel Talalay, Yifan Yang, Ximu Liu, Da Gong, Bing Li, Ting Wang, Wei Wu, Nan Zhang, Xianzhe Wei   +11 more
doaj   +1 more source

Diagnostic Use of Testing for Novel Murine Autoantibodies for Sjögren Disease in the Rheumatology Outpatient Setting

Arthritis Care &Research, EarlyView.
Objective The goal was to assess the diagnostic performance of three novel autoantibodies (NA) for Sjögren disease (SjD) by comparing NA prevalence in patients with SjD, other autoimmune rheumatic diseases (ARDs), nonspecific chronic sialadenitis (CS), and controls.
Chadwick R. Johr, Michael D. George, Vatinee Y. Bunya, Nora Sandorfi, Mina Massaro‐Giordano, Frederick B. Vivino   +5 more
wiley   +1 more source

Intelligent Classification of Surrounding Rock of Tunnel Based on 10 Machine Learning Algorithms

Applied Sciences, 2022
The quality evaluation of the surrounding rock is the cornerstone of tunnel design and construction. Previous studies have confirmed the existence of a relationship between drilling parameters and the quality of surrounding rock.
Siguang Zhao, Mingnian Wang, Wenhao Yi, Di Yang, Jianjun Tong   +4 more
doaj   +1 more source

The design of a numerically controlled drilling system using fluidic elements 1966/7 [PDF]

, 1967
This report outlines the aims of the project and procedures used to bring it to a successful conclusion. It also summarises the results of an investigation into the parameters which govern the specification of a numerically controlled point to ...
Boshier, G. C., Powell, E. A.
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Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Multi-parameter while-drilling monitoring experiment of loaded coal and while-drilling outburst prediction method

Meitan xuebao
The prediction results of coal and gas outburst are directly related to the safe mining of coal seams and the scientific implementation of outburst prevention measures.
Longyong SHU, Zhendong YAN, Zhengshuai LIU, Wenming RAO, Yang LI, Yongqian LIU   +5 more
doaj   +1 more source

SUBSTANTIATION OF MUD PREPARATION TECHNOLOGY [PDF]

, 2018
To study the advantages of hydrodynamic cavitation, to calculate the frequency of cavitation oscillations by the device parameters, to obtain a formula for determining the dispersion time of the material, and to study the flow of the drilling ...
KAMYSHATSKYI, Oleksandr, KHOMENKO, Volodymyr, KOZHEVNYKOV, Anatolii, NAUMENKO, Mykolai, PASHCHENKO, Oleksandr, RATOV, Boranbai   +5 more
core  

Experimental study of the thermal reaming of the borehole by axial plasmatron [PDF]

, 2019
Purpose. To study rock spallation dynamics in the process of the borehole thermal reaming and analyze energy consumption of the borehole thermal reaming process by plasma jets of the axial plasmatron. Methods. Field experimental study of rock spallation
Dhunnoo, N, Potapchuk, I, Sekar, M, Voloshyn, O, Yemelianenko, V, Zhevzhyk, O, Zhovtonoha, M   +6 more
core   +1 more source