Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Wesley J. Keller"'
Autor:
Mikhail Finko, Jonathan C. Crowhurst, Wesley J. Keller, Aric C. Rousso, Sonny S. Ly, David G. Weisz, Davide Curreli, Harry B. Radousky, Kim B. Knight
Publikováno v:
Physics of Plasmas. 29:083506
Recently acquired high-resolution images of nanosecond laser ablation plumes suggest a strong correlation between the internal plume structure and the type of material being ablated. However, the details of this relation are currently not well unders
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc5bde27b0cb93d2b50d227116ccdf81
https://doi.org/10.1063/5.0099167
https://doi.org/10.1063/5.0099167
Autor:
Stephen Pessiki, Wesley J. Keller
Publikováno v:
Research in Nondestructive Evaluation. 30:231-251
This article investigates the use of photon attenuating inclusions (PAI) for enhancing radiographic imaging of cementitious materials in composite structures. By targeting characteristic high attenuation regions in the photon energy spectrum, PAI can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5161a6aeccf8ad29ebb1529c865f944f
https://doi.org/10.1080/09349847.2018.1475585
https://doi.org/10.1080/09349847.2018.1475585
Autor:
Alexander M. Rubenchik, Sonny Ly, Gabe Guss, Jeff D. Bude, Wesley J. Keller, Raluca A. Negres, Nan Shen
Publikováno v:
Optics express. 27(14)
Laser drilling and cutting of materials is well established commercially, although its throughput and efficiency limit applications. This work describes a novel approach to improve laser drilling rates and reduce laser system energy demands by using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7454ffd909ea184d56e74f2d9454cec2
https://pubmed.ncbi.nlm.nih.gov/31503742
https://pubmed.ncbi.nlm.nih.gov/31503742
Autor:
Jeff D. Bude, Raluca A. Negres, Nan Shen, Wesley J. Keller, Alexander M. Rubenchik, Sonny Ly, Gabe Guss
Publikováno v:
Scientific Reports
Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
The results of detailed experiments and high fidelity modeling of melt pool dynamics, droplet ejections and hole drilling produced by periodic modulation of laser intensity are presented. Ultra-high speed imaging revealed that melt pool oscillations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::295938d0015561095fe1f7d4b0ce343e
http://europepmc.org/articles/PMC6544648
http://europepmc.org/articles/PMC6544648
Autor:
Wesley J. Keller, Stephen Pessiki
Publikováno v:
Earthquake Spectra. 31:273-292
Spray-applied fire-resistive material (SFRM) is prone to debonding, cracking, and spalling in steel moment-frame plastic hinge regions during inelastic seismic response. To evaluate the effect of experimentally observed earthquake-induced SFRM spall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::749badeff813bde4e505f016acf86244
https://doi.org/10.1193/123112eqs362m
https://doi.org/10.1193/123112eqs362m
Autor:
Alexander M. Rubenchik, Nan Shen, Sonny Ly, Manyalibo J. Matthews, Jeff D. Bude, Raluca A. Negres, Rajesh N. Raman, Wesley J. Keller, James S. Stolken, Gabe Guss, Jae-Hyuck Yoo
Publikováno v:
Journal of Applied Physics. 125:085103
This study investigates the physical processes involved in picosecond pulse (20-28 ps FWHM) laser ablation of Al 6061, 316L stainless steel, and undoped crystalline Si (〈100〉) over a range of laser wavelength (355 nm and 1064 nm) and fluence (0.1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2b3be87b7ad9fe1f1c20d734d46dc55
https://doi.org/10.1063/1.5080628
https://doi.org/10.1063/1.5080628
Autor:
Stephen Pessiki, Wesley J. Keller
Publikováno v:
Journal of Fire Protection Engineering. 22:271-299
Spray-applied fire-resistive material (SFRM) is prone to debonding, cracking, and spalling in steel moment-frame beam hinge regions during inelastic seismic response. This article presents an analy...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d4a6a2df31095dca7d011510904dc96
https://doi.org/10.1177/1042391512461126
https://doi.org/10.1177/1042391512461126
Autor:
Stephen Pessiki, Wesley J. Keller
Publikováno v:
Journal of Structural Engineering. 141
Earthquake-induced damage to structural components and spray-applied fire-resistive material (SFRM) in steel gravity frame beam-column connection regions can impact connection performance during an ensuing fire. Bolted connections are particularly su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7626aacc81d3896685501aa350917d60
https://doi.org/10.1061/(asce)st.1943-541x.0001237
https://doi.org/10.1061/(asce)st.1943-541x.0001237
Autor:
Wesley J. Keller, Stephen Pessiki
Publikováno v:
Journal of Nondestructive Evaluation. 34
This paper presents a numerical modeling approach, developed within the CIVA RT virtual radiography software, for simulating radiographic imaging of Portland cement-based materials. The modeling approach is validated experimentally for 20 and 30 cm t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::756a83b6d2b2d91c518ab4dd3a585244
https://doi.org/10.1007/s10921-015-0291-y
https://doi.org/10.1007/s10921-015-0291-y
Publikováno v:
Nanomaterials; Volume 6; Issue 2; Pages: 30
Nanomaterials
Nanomaterials, Vol 6, Iss 2, p 30 (2016)
Nanomaterials
Nanomaterials, Vol 6, Iss 2, p 30 (2016)
Nanodrug-carrier delivery in the blood stream is strongly influenced by nanoparticle (NP) dispersion. This paper presents a numerical study on NP transport and dispersion in red blood cell (RBC) suspensions under shear and channel flow conditions, ut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bf55e3e31b62fdab9702494cbf1defc
https://doi.org/10.3390/nano6020030
https://doi.org/10.3390/nano6020030