Results 21 to 30 of about 622,595 (317)
Black shells and naked shells [PDF]
International Journal of Geometric Methods in Modern Physics, 2021 In this paper, we study the collapse of a thin dust shell from the point of view of the horizon dynamics. We identify the critical surfaces at which time and space coordinates interchange their roles and investigate their properties by using the formalism of trapped surfaces.
Walter Pulido, Hernando Quevedo
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Real-time bit wear prediction using mud logger data with mathematical approaches
Journal of Petroleum Exploration and Production Technology, 2019 Nowadays, the success of drilling operations has become more sensitive to cost control. As one of the most effective cost reductions is the elimination of extra trips, real-time bit wear prediction has been a challenge for appropriate decision-making in ...
Hongpeng Yang +2 more
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Shelling pseudopolyhedra [PDF]
Discrete & Computational Geometry, 1992 The intersection \(P\) of a family \(\mathcal H\) of closed half-spaces of Euclidean space is called a pseudopolyhedron if for every \(x\in P\) there is a neighborhood of \(x\) having non-empty intersection with at most finite number of the bounding hyperplanes of the half-spaces from \(\mathcal H\).
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Tribology Online, 2016 Fuel economy is a major challenge for the automotive industry. A key way to improve lubricant fuel efficiency is by using polymers as viscosity index improvers to maximise the viscosity index of the lubricants.
Kumiko Kamata +4 more
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Rock Physical Controls on Production-induced Compaction in the Groningen Field
Scientific Reports, 2018 Advancing production from the Groningen gas field to full depletion generates substantial, field-scale deformation, and surface subsidence. Quantifying associated risk requires understanding physical processes in the subsurface, in particular those ...
Sander Hol +4 more
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Journal of Petroleum Exploration and Production Technology, 2021 The understanding of how basin margin sediment wedge builds out causes shelf-edge migration with time is approached based on shelf-edge trajectory pattern analysis using a high-resolution mega-merge seismic data from the eastern Niger Delta, Nigeria. The
Okwudiri A. Anyiam +2 more
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Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Scientific ReportsContinuous respiratory rate (RR) monitoring is key for early deterioration detection, but conventional methods require contact. Ballistocardiography (BCG) offers an unobtrusive alternative using an under-mattress sensor.
Kumar Chokalingam +10 more
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The role of miR‐335‐5p in the redifferentiation of BRAF p.V600E thyroid cancers
Molecular Oncology, EarlyView.The BRAF p.V600E mutation promotes thyroid cancer dedifferentiation and radioiodine resistance. Using a network approach, we identified miR‐335‐5p as a key regulator of BRAF‐mutated thyroid tumors. Restoring miR‐335‐5p increased thyroid‐specific gene expression and iodine uptake in cells and organoids.
Valeria Pecce +11 more
wiley +1 more source
Sustainable Design of Pavements: Predicting Pavement Service Life
InfrastructuresPavement service life is an important factor that affects both the whole life cost and carbon footprint of a pavement. The service life of a pavement is affected by several different parameters which can be broadly classified into climate conditions ...
Subhendu Bhattacharya +3 more
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