988 resultados para II-VI semiconductor
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
Precede al T. I: Extrait du catalogue des livres militaires et autres qui se trouvent chez Anselin (Successeur de Magimel)
Resumo:
Mode of access: Internet.
Resumo:
Cada tomo con port. y pag. propia.
Resumo:
Datos del imp. tomados del v. de antep.
Resumo:
Printed at the Chiswick Press.
Resumo:
Contiene : Vol. I (12,XXXII,420 p.).- Vol. II (VI,415 p.).- Vol. III (XXIV,414 p.).- Vol. IV (VIII,471 p.)
Resumo:
Contiene: Vol. I (XXVII, 551 p., [3] h. de lám., [4] h. de map. pleg.) -- Vol. II (VI, 692 p., [3] h. de lám., [2] h. de map. pleg.)
Resumo:
A reissue (with additional plates, portraits, etc.) of the "Virginia edition" published by T. Y. Crowell & company in New York, 1902.
Resumo:
"Table of cases cited:" p. ii-vi.
Resumo:
PbS nanocrystals are synthesized using colloidal techniques and have their surfaces capped with oleic acid. The absorption band edge of the PbS nanocrystals is tuned between 900 and 580 nm. The PbS nanocrystals exhibit tuneable photoluminescence with large non-resonant Stokes shifts of up to 500 mcV. The magnitude of the Stokes shift is found to be dependent upon the size of PbS nanocrystals. Time-resolved photoluminescence spectroscopy of the PbS nanocrystals reveals that the photouminescence has an extraordinarily long lifetime of 1 mus. This long fluorescence lifetime is attributed to the effect of dielectric screening similar to that observed in other IV-VI semiconductor nanocrystals.
Resumo:
We present K-band spectra of newly born OB stars in the obscured Galactic giant H II region W51A and approximate to 0.8 '' angular resolution images in the J, H, and K(S)-bands. Four objects have been spectroscopically classified as O-type stars. The mean spectroscopic parallax of the four stars gives a distance of 2.0 +/- 0.3 kpc (error in the mean), significantly smaller than the radio recombination line kinematic value of 5.5 kpc or the values derived from maser proper motion observations (6-8 kpc). The number of Lyman continuum photons from the contribution of all massive stars (NLyc approximate to 1.5 x 10(50) s(-1)) is in good agreement with that inferred from radio recombination lines (NLyc = 1.3 x 10(50) s(-1)) after accounting for the smaller distance derived here. We present analysis of archival high angular resolution images (NAOS CONICA at VLT and T-ReCS at Gemini) of the compact region W51 IRS 2. The K(S)-band images resolve the infrared source IRS 2 indicating that it is a very young compact H II region. Sources IRS 2E was resolved into compact cluster (within 660 AU of projected distance) of three objects, but one of them is just bright extended emission. W51d1 and W51d2 were identified with compact clusters of three objects (maybe four in the case of W51d1) each one. Although IRS 2E is the brightest source in the K-band and at 12.6 mu m, it is not clearly associated with a radio continuum source. Our spectrum of IRS 2E shows, similar to previous work, strong emission in Br gamma and He I, as well as three forbidden emission lines of Fe III and emission lines of molecular hydrogen (H(2)) marking it as a massive young stellar object.
Resumo:
Comprend : Opera omnia ; [Fragmenta.] ; Opuscula historica