Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Sennay Stefanos"'
Publikováno v:
American Journal of Orthodontics and Dentofacial Orthopedics. 138:463-467
Introduction The aim of this study was to evaluate the frictional resistance between active and passive self-ligating brackets and 0.019 × 0.025-in stainless steel archwire during sliding mechanics by using an orthodontic sliding simulation device.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::700202ab59ba16c27f6705b0cf0887da
https://doi.org/10.1016/j.ajodo.2008.11.029
https://doi.org/10.1016/j.ajodo.2008.11.029
Autor:
Carl E. Bonner, George B. Loutts, Peter M. Mwangi, Lester J. Richardson, Sennay Stefanos, Brian M. Walsh, Santiel J. Creekmore
Publikováno v:
Optical Materials. 20:1-12
The spectroscopic analysis of the absorption properties of the Tm3+ ion in the three fluorapatite crystals has been performed. Using the room temperature absorption data, the spontaneous emission rates, cross-sections and cross-relaxation rates have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eef72ca5a831b782854808d9380f75c
https://doi.org/10.1016/s0925-3467(02)00005-8
https://doi.org/10.1016/s0925-3467(02)00005-8
Publikováno v:
Journal of Applied Physics. 88:1935-1942
Energy levels of the 4f3 electronic configuration of Nd3+ in barium fluorapatite, Ba5(PO4)3F(B-FAP) have been determined from polarized absorption and fluorescence spectra using crystals at 8 K. Experimental energy-level assignments were made initial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9db0479cc7238788a0da2ed6fb9406a3
https://doi.org/10.1063/1.1305550
https://doi.org/10.1063/1.1305550
Publikováno v:
Journal of Luminescence. 81:101-109
The vibrations of phosphate (PO−34) ions in single crystals of hexagonal Ba5(PO4)3F (B-FAP) have been investigated by means of polarized Raman scattering and compared to Raman frequencies observed in fluoroapatite analogs Sr5(PO4)3F (S-FAP) and Ca5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c00d080ec683750ca6d29cc060711f22
https://doi.org/10.1016/s0022-2313(98)00055-6
https://doi.org/10.1016/s0022-2313(98)00055-6
Autor:
J. C. Wang, S. Taylor, Carl E. Bonner, B. A. Lasley, A. M. Anderson, Mikhail A. Noginov, Sennay Stefanos, George B. Loutts, Rosalind Wynne
Publikováno v:
Advanced Solid State Lasers.
We have shown that the spectral ranges of Yb3+ emission and Nd3+ emission can overlap around 1 µm in phosphate apatite crystals with large lattive parameters. The Yb:Ba5(PO4)3F and Nd:Ba5(PC4)3 Cl laser of good optical quality have been grown and sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d16094124c242d703362ab4d1ae2526e
https://doi.org/10.1364/assl.1999.wb16
https://doi.org/10.1364/assl.1999.wb16
Autor:
Chandana Meegoda, Chahn C. Chess, Sennay Stefanos, Carl E. Bonner, George E. Miller, George B. Loutts
Publikováno v:
Scopus-Elsevier
The vibrations of phosphate (PO 4 -3 ) ions in single crystals of hexagonal Ba 5 (PO 4 ) 3 F have been investigated by means of polarized Raman scattering and compared to Raman frequencies observed in fluorapatite analogs Sr 5 (PO 4 ) 3 F and Ca 5 (P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::855f2db1de9a93c12944edb090d7744f
https://doi.org/10.1117/12.349236
https://doi.org/10.1117/12.349236
Autor:
Mikhail A. Noginov, Rosalind Wynne, S. Taylor, Carl E. Bonner, Sennay Stefanos, B. A. Lasley, George B. Loutts
Publikováno v:
Journal of the Optical Society of America B. 17:1329
Single crystals of neodymium-doped barium chloroapatite have been grown by the Czochralski technique and evaluated as a laser medium. Among known Nd-doped apatites, the material studied is characterized by the longest luminescence lifetime, τ=0.375
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53827117031cb47a0cc77018f2a437be
https://doi.org/10.1364/josab.17.001329
https://doi.org/10.1364/josab.17.001329
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