109,315 research outputs found
An 80 pc Long Massive Molecular Filament in the Galactic Mid-Plane
The ubiquity of filaments in star forming regions on a range of scales is
clear, yet their role in the star formation process remains in question. We
suggest that there are distinct classes of filaments which are responsible for
their observed diversity in star-forming regions. An example of a massive
molecular filament in the Galactic mid-plane formed at the intersection of
UV-driven bubbles which displays a coherent velocity structure (< 4 km/s) over
80 pc is presented. We classify such sources as Massive Molecular Filaments
(MMFs; M > 10^4 Msun, length > 10 pc, velocity gradient < 5 km/s) and suggest
that MMFs are just one of the many different classes of filaments discussed in
the literature today. Many MMFs are aligned with the Galactic Plane and may be
akin to the dark dust lanes seen in Grand Design Spirals.Comment: To appear in proceedings of the 'Labyrinth of Star Formation' meeting
(18-22 June 2012, Chania, Greece), published by Springe
Directionally solidified eutectic gamma plus beta nickel-base superalloys
A directionally solidified multivariant eutectic gamma + beta nickel-base superalloy casting having improved high temperature strength and oxidation resistance properties is provided. This comprises a two phase eutectic structure containing, on a weight percent basis, 5.0-15.0 tungsten, 8.5-14.5 aluminum, 0.0-35.0 cobalt and the balance being nickel. Embedded within the gamma phase nickel-base matrix are aligned eutectic beta phase (primarily (NiCo)Al reinforcing lamellae
Directionally solidified eutectic gamma-gamma nickel-base superalloys
A directionally solidified multivariant eutectic gamma-gamma prime nickel-base superalloy casting having improved high temperature properties was developed. The alloy is comprised of a two phase eutectic structure consisting essentially of on a weight percent base, 6.0 to 9.0 aluminum, 5.0 to 17.0 tantalum, 0-10 cobalt, 0-6 vanadium, 0-6 rhenium, 2.0-6.0 tungsten, and the balance being nickel, subject to the proviso that the sum of the atomic percentages of aluminum plus tantalum is within the range of from 19-22, and the ratio of atomic percentages of tantalum to aluminum plus tantalum is within the range of from 0.12 to 0.23. Embedded within the gamma nickel-base matrix are aligned eutectic gamma prime phase (primarily nickel-aluminum-tantalum) reinforcing fibers
Natural Dirac Neutrinos from Warped Extra Dimension
Dirac neutrinos arising from gauged discrete symmetry \`a la Krauss-Wilczek
are implemented in the minimal custodial Randall-Sundrum model. In the case of
a normal hierarchy, all lepton masses and mixing pattern can be naturally
reproduced at the TeV scale set by the electroweak constraints, while
simultanously satisfy bounds from lepton flavour violation. A nonzero neutrino
mixing angle, , is generic in the scenario, as well as the
existence of sub-TeV right-handed Kaluza-Klein neutrinos, which may be searched
for at the LHC.Comment: Talk given at the 2nd Young Researchers Workshop "Physics Challenges
in the LHC Era", Frascati, May 10 and 13, 2010, 6 page
Laboratory measurements of the cometary photochemical phenomena
Laboratory experiments are described that provide fundamental information about photochemical processes in comets. The yield of cometary radicals such as CN, OH, etc. can be determined as a function of photolyzing wavelength. Quantum state distributions of the internal energy of the cometary radicals can also be measured as a function of wavelength permitting one to define the recoil velocity of the fragments. This type of information supplies the data needed for more elaborate models to interpret the data being obtained on comets
Nurses\u27 Alumnae Association Bulletin - Volume 3 Number 6
My Thirty Months in a Jap Camp
Alumnae Day
Hi-Lights of the Alumnae Association Meetings
New Linen System at Jefferson
Welcome! Miss Jackson
Condolences and Miscellaneous Items
A Step Forward
Bits of Chatter Concerning Jefferson
Streptomycin
Improvements in the Nursing Arts Laboratory
Thirty-Eighth General Hospital
News of Teaching Staff
Graduation Prizes
Student Anesthetists
On Furlough
Graduation
Staff News
Changes and Improvements in the Hospital
Positions
Overseas Boxes
Deaths
Army Nurse Corps
Navy Nurse Corps
Marriages
Engagements
Marriages of Nurses Overseas
New Arrivals
New Addresse
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