Results 61 to 70 of about 177,892 (289)

Circumstellar habitable zones for deep terrestrial biospheres [PDF]

, 2013
SM and JOJ are grateful to the UK Science and Technology Facilities Council (STFC) for Aurora Studentships. We thank Dr. Stephen Clifford (LPI), Dr. Ravi Kopparapu (Penn State), and Claire Davis (St. Andrews) for generous technical advice.
McMahon, Sean Hendry, O'Malley-James, Jack, Parnell, John   +2 more
core   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Identification and Removal of Contaminant Sequences From Ribosomal Gene Databases: Lessons From the Census of Deep Life

Frontiers in Microbiology, 2018
Earth’s subsurface environment is one of the largest, yet least studied, biomes on Earth, and many questions remain regarding what microorganisms are indigenous to the subsurface. Through the activity of the Census of Deep Life (CoDL) and the Deep Carbon
Cody S. Sheik, Brandi Kiel Reese, Katrina I. Twing, Jason B. Sylvan, Sharon L. Grim, Matthew O. Schrenk, Mitchell L. Sogin, Frederick S. Colwell   +7 more
doaj   +1 more source

Innovative X-ray diffraction and micromagnetic approaches for reliable residual stress assessment in deep rolled and microfinished AISI 4140 components

Journal of Materials Research and Technology, 2022
The residual stress state in the subsurface is a key element of surface integrity. It is well known to have a significant impact on a component's properties in terms of fatigue behavior and resistance to wear and corrosion.
Simon Strodick, Florian Vogel, Meik Tilger, Marie Denstorf, Monika Kipp, Nikolas Baak, Dimitri Kukui, Dirk Biermann, Marina Macias Barrientos, Frank Walther   +9 more
doaj   +1 more source

Assessing the ability of the 14C projection-age method to constrain the circulation of the past in a 3-D ocean model [PDF]

, 2008
Radiocarbon differences between benthic and planktonic foraminifera (B-P ages) and radiocarbon projection ages are both used to determine changes of the past ocean circulation rate.
Adkins, J. F., Franke, J., Paul, A., Schulz, M.   +3 more
core   +1 more source

Characterization of a Recyclate‐Based MgO‐Steel Composite As‐Sintered Inert Anode Candidate After Exposure to Cryolite Electrolysis

Advanced Engineering Materials, EarlyView.
Carbon‐free inert anodes are essential for decarbonizing aluminum electrolysis. This study investigates a recyclate‐based MgO‐316L steel composite anode tested under galvanostatic Hall–Héroult conditions in cryolite at 1000°C. Microstructural analysis reveals selective MgO fluorination, spinel and oxide layer formation, electrolyte infiltration, and ...
Serhii Yaroshevskyi, Alexander Adamczyk, Nora Brachhold, Gert Schmidt, Jana Hubálková, R. Gumeniuk, Alexandros Charitos, Christos G. Aneziris   +7 more
wiley   +1 more source

Intelligent recognition of subsurface utilities and voids: A ground penetrating radar dataset for deep learning applicationsMendeley Data

Data in Brief
Ground Penetrating Radar (GPR), has emerged as a powerful non-invasive geophysical technique for detecting subsurface utilities, voids, and other subsurface anomalies.
Abdelaziz Mojahid, Driss El Ouai, Khalid El Amraoui, Khalil El-Hami, Hamou Aitbenamer   +4 more
doaj   +1 more source

Changes in the deep subsurface microbial biosphere resulting from a field-scale CO2 geosequestration experiment

Frontiers in Microbiology, 2014
Subsurface microorganisms may respond to increased CO2 levels in ways that significantly affect pore fluid chemistry. Changes in CO2 concentration or speciation may result from the injection of supercritical CO2 (scCO2) into deep aquifers.
Andre eMu, Andre eMu, Andre eMu, Chris eBoreham, Chris eBoreham, Henrietta X Leong, Henrietta X Leong, Ralf eHaese, Ralf eHaese, John W Moreau, John W Moreau   +10 more
doaj   +1 more source

Estimating oceanic primary production using vertical irradiance and chlorophyll profiles from ocean gliders in the North Atlantic [PDF]

, 2015
An autonomous underwater vehicle (Seaglider) has been used to estimate marine primary production (PP) using a combination of irradiance and fluorescence vertical profiles.
Adrian P. Martin, Andrew F. Thompson, Damerell G. M., Davis R. E., Eleanor Frajka-Williams, Eriksen C. C., Gillian Damerell, Kirk J. T. O., Liss P. S., Mobley C. D., Platt T., Stuart C. Painter, Timothy J. Smyth, Victoria S. Hemsley   +13 more
core   +4 more sources

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena, Benjamin Bergmann, Michael Zenger   +2 more
wiley   +1 more source