Results 81 to 90 of about 16,173 (293)

Experimental characterization and modelling of a cavitating centrifugal pump operating in fast start-up conditions [PDF]

open access: yes, 2010
The start-up of rocket engine turbopumps is generally performed only in a few seconds. It implies that these pumps reach their nominal operating conditions after only a few rotations.
Bois, Gérard   +4 more
core   +1 more source

The Behavior of Non-Destructive Test for Different Grade of Concrete [PDF]

open access: yes, 2020
Rebound hammer are prefer as non-destructive testing methods; where compression test as destructive test. A general series of tests for rebound hammer and destructive test was carried out at heavy concrete laboratory to obtain the desire result. A set of
Abd Rahman, Norashidah   +5 more
core   +2 more sources

Time-resolved fuel injector flow characterisation based on 3D laser Doppler vibrometry [PDF]

open access: yes, 2014
In order to enable investigations of the fuel flow inside unmodified injectors, we have developed a new experimental approach to measure time-resolved vibration spectra of diesel nozzles using a three dimensional laser vibrometer.
Crua, Cyril, Heikal, Morgan R.
core   +3 more sources

A Comprehensive Review of the Key Factors Affecting Biogas Production From Anaerobic Digestion of Organic Waste

open access: yesCleanMat, EarlyView.
Efficient conversion of organic waste to biogas depends on the coordinated optimization of feedstock composition, pretreatment, operational parameters, reactor design, and microbial community dynamics. This review highlights how these interacting factors improve methane yield and process stability, advancing anaerobic digestion as a practical pathway ...
Ahmed Alengebawy   +6 more
wiley   +1 more source

Predicting current compressive strength of concrete based on non-destructive testing by way of sound [PDF]

open access: yes, 2001
Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the ...
Coots, Emmit Kevin
core   +1 more source

National Identity Meaning and Attitudes Toward War, Peace, and the Future of Ukraine

open access: yesConflict Resolution Quarterly, EarlyView.
ABSTRACT The link between attitudes and social identity is complex, influencing perceptions, motivations, and actions. Social psychological research mainly focused on the role of attitude in identity formation, particularly in the contexts of social movements and collective action.
Karina V. Korostelina   +6 more
wiley   +1 more source

Breadth at the Helm: Generalist CEOs and Corporate ESG Performance‐Evidence From China

open access: yesCorporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Drawing on the Upper Echelons Theory and the Imprinting Theory, this study conjectures that generalist CEOs may have a stronger tendency to pursue environmental, social and governance (ESG) goals. We perform multiple regression analyses with observations of Shanghai and Shenzhen A‐share listed companies from 2010 to 2023 in order to explore ...
Shanmei Luo   +4 more
wiley   +1 more source

Compression of UCT and Rebound Hammer in determination of UCS on rock material / Siti Aishah Noh [PDF]

open access: yes, 2007
Uniaxial Compression Test (UCT) and Rebound Hammer Test are accepted rock mechanics testing procedure used to determine rock strength in geotechnical practice. Intact Limestones were collected at Pusat Geosains and Mineral Ipoh, Perak.
Noh, Siti Aishah
core  

Rock mass characterization coupled with seismic noise measurements to analyze the unstable cliff slope of the Selmun Promontory (Malta) [PDF]

open access: yes, 2017
In the Mediterranean area, cliff slopes represent widespread high-risk landforms as they are highly frequented touristic places often interested by landslide processes.
D’Amico, Sebastiano   +3 more
core   +1 more source

Acoustic‐driven surface cleaning with millimeter‐sized bubbles at translational resonance

open access: yesDroplet, EarlyView.
Time‐lapse visualization comparing bubble trajectories. The top panel (0 Hz) shows a bubble's linear path under no acoustic forcing, while the bottom panel (50 Hz) demonstrates the oscillatory motion induced by acoustic waves at a resonance mode. This mechanism holds promising potential for applications such as surface cleaning.
Yan Jun Lin   +2 more
wiley   +1 more source

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