Results 61 to 70 of about 4,551,617 (315)
Applied Sciences, 2020 The utility tunnels used for electricity transmission are in high demand these days. The literature presents many limitations in the currently used cutterhead drive design procedure while using a shield tunnel boring machine (TBM) for the excavation of ...
Kyoungyul Kim +6 more
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Loading Tests on Full-Scale House Roofs
, 1962 Earlier loading tests on single roof frames had shown that many conven tional rafter-and-joist frames had failure loads well below the design snow loads specified in Canada. This suggested that either actual snow loads were lower than the design values or that the strength of individual roof frames do not indicate full strength of the complete roof ...
Thorburn, H. J., Schriever, W. R.
openaire +3 more sources
Full scale fatigue testing of crankshaft
Rakenteiden Mekaniikka, 2017 This article outlines full-scale fatigue testing of crankshafts, in particular with the resonance fatigue testing method. The focus of the paper is the practical implementation of the method.
Korhonen, Jussi +3 more
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Turbulence and pressure loss characteristics of the inlet vanes for the 80- by 120-ft wind tunnel [PDF]
A series of wind tunnel investigations were conducted to determine the flow characteristics downstream of a set of wind tunnel inlet flow conditioning vanes.
Dudley, Michael R.
core +1 more source
Influence and evaluation of constraint on fracture toughness in pipeline research [PDF]
, 2012 Accessing nowadays fossil fuel reserves requires a strain-based design approach. Within such design, the ductile tearing resistance is a key parameter in assessing the defect tolerance. To determine this tearing resistance, full scale (pressurized) tests
De Waele, Wim +3 more
core
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
A Framework for Predicting Fatigue Crack Initiation Life in Pipelines with Girth Welds
Journal of Marine Science and EngineeringCurrent studies on fatigue crack initiation in pipelines remain relatively limited. Existing frameworks are confronted with issues including difficulties in crack monitoring and limited consideration of intragranular short-crack propagation.
Jianxing Yu +3 more
doaj +1 more source
Rotorcraft research testing in the National Full-Scale Aerodynamics Complex at NASA Ames Research Center [PDF]
The unique capabilities of the National Full-Scale Aerodynamics Complex (NFAC) for testing rotorcraft systems are described. The test facilities include the 40- by 80-Foot Wind Tunnel, the 80- by 120-Foot Wind Tunnel, and the Outdoor Aerodynamic Research
Johnson, W., Smith, C. A., Warmbrodt, W.
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FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
BuildingsFor steel–concrete composite bridges, the cracking of concrete in the tensile zone influences the serviceability of bridges and decreases their durability.
Songsong Guo, Chao Liu, Xiaogang Ma
doaj +1 more source