Results 111 to 120 of about 945,774 (394)

Survey of information concerning large diameter deep hole drilling [PDF]

open access: yes, 1972
Data are presented, covering drilling techniques, factors affecting penetration rates, cost estimation, and system improvement.

core   +1 more source

Effects of Temperature Annealing on the Intrinsic Transport Mechanisms of Solution Processed Graphene Nanosheet Networks

open access: yesAdvanced Functional Materials, EarlyView.
Unravelling charge transport mechanisms in graphene nanosheet networks: by combining temperature‐dependent conductivity measurements with a Random Resistor Network model, this study identifies a transition from hopping‐dominated conduction to a band‐like transport mechanism.
Alessandro Grillo   +9 more
wiley   +1 more source

Thermal Evaluation of Bone Drilling: Assessing Drill Bits and Sequential Drilling

open access: yesBioengineering
Sequential drilling is a common practice in dental implant surgery aimed at minimizing thermal damage to bone. This study evaluates the thermal effects of sequential drilling and assesses modifications to drilling protocols to manage heat generation.
Sihana Rugova, Marcus Abboud
openaire   +3 more sources

Evaluating Hole Quality in Drilling of Al 6061 Alloys

open access: yesMaterials, 2018
Hole quality in drilling is considered a precursor for reliable and secure component assembly, ensuring product integrity and functioning service life. This paper aims to evaluate the influence of the key process parameters on drilling performance.
Mohammad Uddin   +5 more
semanticscholar   +1 more source

Determinants of the Timing and Incidence of Exploratory Drilling on Offshort Wildcat Tracts [PDF]

open access: yes
This paper documents exploratory drilling activity on offshore wildcat oil and gas leases in the Gulf of Mexico that were sold between 1954 and 1990, with emphasis on the period before 1980.
Kenneth Hendricks, Robert H. Porter
core  

Impregnated drill bits strengthened by nanoparticles for mineral exploration drilling [PDF]

open access: yes, 2018
In order to improve the drilling efficiency and service life of impregnated diamond drill bit, WC and ZrO2 nanoparticles were introduced into traditional drill bit matrix.
Baochang, L.   +3 more
core  

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

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