Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Thomas G. Bull"'
Autor:
Thomas G. Bull, John W. McBride
Publikováno v:
Technologies, Vol 7, Iss 4, p 69 (2019)
Most failures in micro electromechanical system (MEMS) switches can be attributed to the degradation of contact surfaces and sticking contacts. A wear-tolerant composite contact material, composed of a Au film supported by multi walled carbon nanotub
Externí odkaz:
https://doaj.org/article/407e77fe62774610b201fa1e73a8ef8f
Autor:
Thomas G. Bull, John W. McBride
Publikováno v:
Technologies, Vol 6, Iss 2, p 47 (2018)
To develop robust microelectromechanical systems (MEMS) switching technology for low voltage direct current (DC) applications (1–12 V) there is a requirement for the investigation of wear caused by hot switching (contact operated while carrying a c
Externí odkaz:
https://doaj.org/article/9aa66c2a37674f4db204dfd4fdf04814
Publikováno v:
Journal of Propulsion and Power. 37:816-831
An electrospray thruster designed for nanosatellites is introduced in this paper. The thruster has a compact size featuring a passive propellant transport method through the use of porous materials...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2c116436dadb1d7489a3d0a757fb4aa
https://doi.org/10.2514/1.b37996
https://doi.org/10.2514/1.b37996
Switching performance of a low-voltage switching device (LVSD) is determined by limiting current and stopping re-ignition. This is strongly influenced by how the arc moves inside the LVSD quenching chamber during the switching process. Improved switc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a153a8a747792d9277cc9e91c6350be
https://eprints.soton.ac.uk/450960/
https://eprints.soton.ac.uk/450960/
Natural human enamel (NHE) is a complex freeform surface which has presented significant difficulties in measuring surface form change using non-contacting laser profilometry (NCLP). Measuring surface form change on NHE is a metrology proxy for measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0aea3cb8e90625424a057e6041bee935
https://eprints.soton.ac.uk/449545/
https://eprints.soton.ac.uk/449545/
Publikováno v:
Dental Materials. 35:e140-e152
Objectives To determine the detection threshold of non-contacting laser profilometry (NCLP) measuring surface form and surface roughness change in natural human enamel in vitro, characterise how ambient scanning thermal variation affects NCLP measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5a5faade63ee6d4be601ecdf687510e
https://doi.org/10.1016/j.dental.2019.04.003
https://doi.org/10.1016/j.dental.2019.04.003
Arc motion in a quenching chamber has a significant influence on switching performance in a low-voltage switching device (LVSD). A high-speed optical arc imaging system (AIS) has been used to investigate the influence of the design parameters of a qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51e170eaa8da55beba260f3d3d26f9d0
https://eprints.soton.ac.uk/443808/
https://eprints.soton.ac.uk/443808/
Autor:
Thomas G. Bull, John W. McBride
Publikováno v:
2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM).
A metallic coated carbon nanotube surface, developed for use in a micro-electromechanical (MEMS) switching device, is investigated for performance, when switching 4 VDC, with current levels between 10 to 600 mA; with the objective of understanding th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84c962ed84322928927b2df12f74ec4e
https://doi.org/10.1109/hlm49214.2020.9307880
https://doi.org/10.1109/hlm49214.2020.9307880
Publikováno v:
Dental materials : official publication of the Academy of Dental Materials. 37(4)
Objective To investigate the measurement threshold of an intra-oral scanner (IOS) on polished human enamel. Methods The optical performance of an IOS was compared to a gold-standard non contacting laser profilometer (NCLP), on a painted microscope sl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67b6cb797a372fd09808a1e9c17327f3
https://pubmed.ncbi.nlm.nih.gov/33573841
https://pubmed.ncbi.nlm.nih.gov/33573841
Publikováno v:
Optical Metrology and Inspection for Industrial Applications VI.
An overview is provided of the non-contact measurement of surface morphology, focusing on form and roughness. Existing methods considered include con-focal scanning methods for the evaluation of large-scale surfaces where comparisons are drawn with d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::569cdca8c641e6b1142da6b93181b64c
https://doi.org/10.1117/12.2540438
https://doi.org/10.1117/12.2540438