Results 41 to 50 of about 31,128 (147)

Inhomogeneous low temperature epitaxial breakdown during Si overgrowth of GeSi quantum dots

, 2011
Low temperature epitaxial breakdown of inhomogeneously strained Si capping layers is investigated. By growing Si films on coherently strained GeSi quantum dot surfaces, we differentiate effects of surface roughness, strain, and growth orientation on the ...
Floro, Jerrold A., Petz, Christopher W.
core   +1 more source

Centurial‐millenial ice‐rafted debris pulses from ablating marine ice sheets [PDF]

, 2001
We use an ice‐sheet model to show that (i) margins of marine ice‐sheets can be expected to be frozen to the bed, except where ice‐streams discharge; (ii) 20–50km retreats induced by ablation rates of 2 m/yr provide sufficient debris flux through the ...
Hindmarsh, Richard C.A., Jenkins, Adrian
core   +1 more source

Exploring Disk Galaxy Dynamics Using IFU Data [PDF]

, 2008
In order to test the basic equations believed to dictate the dynamics of disk galaxies, we present and analyze deep two-dimensional spectral data obtained using the PPAK integral field unit for the early-type spiral systems NGC 2273, NGC 2985, NGC 3898 ...
A. Aragn-Salamanca, Bedregal, Bedregal, Binney, Bottema, Bottema, Cappellari, E. Noordermeer, Emsellem, Gerssen, Jeans, Kelz, Kuijken, Lewis, M. R. Merrifield, Merrett, Merrifield, Noordermeer, Noordermeer, Noordermeer, Noordermeer, Roth, Shapiro, Snchez, van der Kruit, van Dokkum, Verheijen   +26 more
core   +1 more source

Classification of Ge hut clusters in the arrays formed by molecular beam epitaxy at low temperatures on the Si(001) surface

, 2009
Morphological investigations and classification of Ge hut clusters forming the arrays of quantum dots on the Si(001) surface at low temperatures in the process of the ultrahigh vacuum molecular beam epitaxy have been carried out using in situ scanning ...
Arapkina, Bauer, Bauer, Eltsov, Jesson, L.V. Arapkina, Stranski, V.A. Yuryev, Voigtländer, Кучеренко, Пчеляков, Смагина   +11 more
core   +1 more source

Analysis of aerothermal loads on spherical dome protuberances [PDF]

Hypersonic flow over spherical dome protuberances was investigated to determine increased pressure and heating loads to the surface. The configuration was mathematically modeled in a time-dependent three-dimensional analysis of the conservation of mass ...
Olsen, G. C., Smith, R. E.
core   +1 more source

The Extraordinary `Superthin' Spiral Galaxy UGC7321. I. Disk Color Gradients and Global Properties from Multiwavelength Observations

, 1999
We present B- and R-band imaging and photometry, H-alpha narrow-band imaging, NIR H-band imaging, and HI 21-cm spectroscopy of the nearby Sd spiral galaxy UGC7321. UGC7321 exhibits a remarkably thin stellar disk with no bulge component.
Aoki T. E., Barteldrees A., Bergvall N., Bouchet P., Cox A. L., de Blok W. J. G., de Blok W. J. G., de Grijs R., de Jong R. S., Disney M. J., Firmani C., Gerritsen J. P. E., Guibert J., Hamabe M., J. S. Gallagher III, Just A., Karachentsev I., Karachentsev I., Kodaira K., L. D. Matthews, Lequeux J., Makarov D. I., Makarov D. I., Sage L. J., Sasaki T., Secker J., van der Kruit P. C., W. van Driel, Xilouris E. M., Zasov A. V.   +29 more
core   +2 more sources

Characterizing the Adaptive Optics Off-Axis Point-Spread Function - I: A Semi-Empirical Method for Use in Natural-Guide-Star Observations

, 2002
Even though the technology of adaptive optics (AO) is rapidly maturing, calibration of the resulting images remains a major challenge. The AO point-spread function (PSF) changes quickly both in time and position on the sky.
B. A. Macintosh, D. Gavel, David Crampton, E. Steinbring, E. L. Gates, F. Rigaut, Fried D. L., J. P. Lloyd, James R. Graham, Julian C. Christou, L. M. Raschke, M. Le Louarn, Noll R. J., Roddier F., Roddier F., S. Hinkley, S. M. Faber, Scott A. Severson, Steinbring E., Veran J.-P.   +19 more
core   +2 more sources

Preliminary DIMM and MASS Nighttime Seeing Measurements at PEARL, in the Canadian High Arctic

, 2013
Results of deploying a Differential Image Motion Monitor (DIMM) and a DIMM combined with a Multi-Aperture Scintillation Sensor (MASS/DIMM) are reported for campaigns in 2011 and 2012 on the roof of the Polar Environment Atmospheric Research Laboratory ...
Carlberg, Ray, Leckie, Brian, Millar-Blanchaer, Max, Murowinski, Rick, Ngan, Wayne, Steinbring, Eric   +5 more
core   +1 more source

تقييم قابلية السحب العميق لعدد من الخلائط الفولاذية ومقارنتها بالخليطة CuZn30

مجلة جامعة دمشق للعلوم الهندسية
يهدف هذا البحث إلى تقييم قابلية السحب العميق لعدد من الخلائط الفولاذية لمقارنتها بقابلية السحب المكافئة الخاصة بالخليطة النحاسية CuZn30، وذلك من خلال إخضاع عينات متطابقة من الخليطة النحاسية المعنية ومن خلائط فولاذية معروفة بقابلية تشكيلها الجيدة لاختبار
محمد وفيق الشيخ, د. وسيم ديب, د. ماجد حيبا   +2 more
doaj  

Spectrophotometry with a transmission grating for detecting faint occultations

, 2002
High-precision spectrophotometry is highly desirable in detecting and characterizing close-in extrasolar planets to learn about their makeup and temperature.
Hinz, P. M., Kenworthy, M. A.
core   +1 more source