Zobrazeno 1 - 10
of 78
pro vyhledávání: '"David R. Day"'
Publikováno v:
Applied Spectroscopy. 70:810-815
While laser-induced breakdown spectroscopy (LIBS) has been in use for decades, only within the last two years has technology progressed to the point of enabling true handheld, self-contained instruments. Several instruments are now commercially avail
Publikováno v:
Journal of Reinforced Plastics and Composites. 14:297-308
Dielectric Analysis is routinely used for monitoring the cure of thermosetting resins. Implantable, disposable sensors allow measurements of the curing process to be made in various locations throughout a part. Permanent, reusable sensors flush mount
Autor:
David R. Day
Publikováno v:
Journal of Reinforced Plastics and Composites. 13:918-926
Curing characteristics of thick composite parts have long been known to be a function of thickness and location within the parts. While cure state as a function of thickness has often been modeled, actual experimental verification has been difficult.
Publikováno v:
Polymer Engineering and Science. 32:524-528
Recent work has shown that moisture diffusion coefficients can be measured in thin polymer films through monitoring changes in permittivity with microdielectric sensors. The sensor is constructed in silicon and consists of an interdigitated electrode
Autor:
David D. Shepard, David R. Day
Publikováno v:
Polymer Composites. 12:87-90
With the relatively recent trend toward adaptive process control during processing of structural composites, there is need for an understanding of the nature of variations during cure that are encountered. Part-to-part variations can arise because of
Autor:
Michael A. Butler, David R. Day, Abraham Mcallister, Kostas Zafiriou, Malcolm C. Smith, S.D. Senturia, E.R. Deutsch
Publikováno v:
The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05..
This paper describes the implementation of an optically efficient near-infrared spectrometer using a diffractive-MEMS chip in combination with digital-transform methods. This spectrometer architecture offers potential advantages over conventional det
Autor:
David R. Day
Publikováno v:
SPIE Proceedings.
A scalar diffraction model was developed that simulates throughput and phase information vs. wavelength in MEMS based multi-channel gain equalization applications. Group delay and chromatic dispersion are determined and compared to that measured on a
Autor:
David R. Day, David D. Shepard
Publikováno v:
38th Electronics Components Conference 1988., Proceedings..
Recent developments in the area of microelectronics now enable the fabrication of microdielectric sensors that can follow the drying, curing, and diffusion phenomena in thin films. This paper first investigates the response of the rricrodielectric se
Autor:
David R. Day
Publikováno v:
NIR news. 21:10-11
Autor:
Huan L. Lee, David R. Day
Publikováno v:
SAE Technical Paper Series.