Zobrazeno 1 - 10
of 42
pro vyhledávání: '"David W. Watt"'
Publikováno v:
High Energy/Average Power Lasers and Intense Beam Applications IX.
We report a method for locking the output wavelength and reducing the spectral linewidth of diode lasers by feeding back light to the emitters from a wavelength selective external optical cavity. Ten years ago our team developed a stepped-mirror that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c0bcbdde1ffe8898b405ca35f3b994d
https://doi.org/10.1117/12.2211356
https://doi.org/10.1117/12.2211356
Autor:
Iulian C. Ruset, F. William Hersman, Jan Distelbrink, David W. Watt, Jeffrey Ketel, Walter Porter, Stephen Ketel
We describe the principle of operation, design implementation, and initial performance of a high production xenon-129 polarizing system. The polarizer is built on the concept of counterflow-polarizing using a high-power spectrally-narrowed laser, a m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e1f04f547884501984163eb542f2da9
https://doi.org/10.1039/9781782628378-00086
https://doi.org/10.1039/9781782628378-00086
Publikováno v:
Experiments in Fluids. 39:86-98
The vortex formation and shedding process in the near wake region of a 2D square-section cylinder at incidence has been investigated by means of particle image velocimetry (PIV). Proper orthogonal decomposition (POD) is used to characterize the coher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13e678ab213f584c9ec32551ba3dff46
https://doi.org/10.1007/s00348-005-0985-5
https://doi.org/10.1007/s00348-005-0985-5
Publikováno v:
Experiments in Fluids. 36:309-325
Two quantitative schlieren methods are assessed and compared: calibrated color schlieren (CCS) and back- ground oriented schlieren (BOS). Both methods are capable of measuring the light deflection angle in two spatial directions, and hence the projec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9abd9885c430b4945fa59a4a34165fb2
https://doi.org/10.1007/s00348-003-0724-8
https://doi.org/10.1007/s00348-003-0724-8
Autor:
B. J. Pelliccia-Kraft, David W. Watt
Publikováno v:
Experiments in Fluids. 30:633-644
Proper orthogonal decomposition (POD) is a method of examining spatial coherence in unsteady flow fields from an ensemble of multidimensional measurements. When applied to experimental data, the proper orthogonal decomposition is generally restricted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ebb42dd6480edf34951ac688fe2a797
https://doi.org/10.1007/s003480000241
https://doi.org/10.1007/s003480000241
Autor:
B. J. Pelliccia-Kraft, David W. Watt
Publikováno v:
Experiments in Fluids. 29:573-581
The 3-D density field of a round, neutrally buoyant turbulent jet is obtained using a finite-fringe, shearing interferometer. A He–Ne laser beam (λ=632.8 nm) is subdivided into six beams of equal intensity, which intersect a helium–argon jet flo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c792cf0ac7481a0329cb33323ba520f4
https://doi.org/10.1007/s003480000125
https://doi.org/10.1007/s003480000125
Publikováno v:
Journal of Aircraft. 32:921-928
The pressure distribution at the tire-wheel interface is not presently well understood, despite the need for using this load distribution to design fail-safe wheels. To investigate this boundary condition, methodologies for accurately measuring the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d86e9f34001ddebc4e2e36b564c20ae
https://doi.org/10.2514/3.46819
https://doi.org/10.2514/3.46819
Publikováno v:
Computers & Structures. 56:377-387
Aircraft wheels are designed to exhibit a fail-safe point so that a crack in the wheel can be detected before any catastrophic failure occurs. Presently, engineers use intrusive instrumentation to directly measure the tire-wheel interface pressure di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::067d3bdf05601cb3962ce37f33963c35
https://doi.org/10.1016/0045-7949(95)00030-k
https://doi.org/10.1016/0045-7949(95)00030-k
Autor:
T. D. Upton, David W. Watt
Publikováno v:
Experiments in Fluids. 14:271-276
Calibrated multichannel electronic interferometry, a new technique for quantitative flow visualization of transient phenomena, is discussed. This technique uses an interferometer combined with diffraction gratings to generate three phase shifted inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08051fb5b346704f48868712351e67ac
https://doi.org/10.1007/bf00194018
https://doi.org/10.1007/bf00194018
Autor:
David W. Watt
Publikováno v:
Applied optics. 34(32)
Tomographic reconstruction from a limited amount of projection data of fields with embedded opaque objects can result in streaks and other artifacts in the reconstructed image. These artifacts result from the use of local-basis-function expansions to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::734e9722b08be1d9cd8cc4e7265c028f
https://pubmed.ncbi.nlm.nih.gov/21060621
https://pubmed.ncbi.nlm.nih.gov/21060621