82,533 research outputs found
Dark of the Moon (1985)
Playwrights: Howard Richardson and William Berney
Director: Hal J. Todd
Set Design: Donamarie Reeds
Costumes: Elizabeth Poindexter
Academic Year: 1985-1986https://scholarworks.sjsu.edu/productions_1980s/1044/thumbnail.jp
Lunar Surface Gravimeter Experiment
The lunar surface gravimeter which was emplaced on the moon by the Apollo 17 flight is described and a schematic diagram of the sensor is provided. The objective of the lunar surface gravimeter is to use the moon as an instrumented antenna to detect gravitational waves. Another objective is to measure tidal deformation of the moon. Samples of signals received during lunar sunrise activity and during quiet periods are presented in graph form based on power spectrum analysi
A review of East Asian reports of aurorae and comets circa AD 775
Given that a strong 14C variation in AD 775 has recently been suggested to be
due to the largest solar flare ever recorded in history, it is relevant to
investigate whether celestial events observed around that time may have been
aurorae, possibly even very strong aurorae, or otherwise related to the 14C
variation (e.g. a suggested comet impact with Earth's atmosphere). We
critically review several celestial observations from AD 757 to the end of the
770s, most of which were previously considered to be true, and in some cases,
strong aurorae; we discuss in detail the East Asian records and their wording.
We conclude that probably none among the events after AD 770 was actually an
aurora, including the event in AD 776 Jan, which was misdated for AD 774 or
775; the observed white qi phenomenon that happened "above the moon" in the
south-east was most probably a halo effect near the full moon - too late in any
case to be related to the 14C variation in AD 774/5. There is another report of
a similar (or identical) white qi phenomenon "above the moon", reported just
before a comet observation and dated to AD 776 Jan; the reported comet observed
by the Chinese was misdated to AD 776, but actually sighted in AD 767. Our
critical review of East Asian reports of aurorae circa AD 775 shows some very
likely true Chinese auroral displays observed and reported for AD 762; there
were also several events prior to AD 771 that may have been aurorae but are
questionable.Comment: 15 pages with 4 figure
Measurement of charmonium production in PbPb collisions at sqrt(sNN) = 2.76 TeV with CMS
The Compact Muon Solenoid (CMS) is fully equipped to measure hard probes in
the di-muon decay channel in the high multiplicity environment of
nucleus-nucleus collisions. Such probes are especially relevant for studying
the quark-gluon plasma since they are produced at early times and propagate
through the medium, mapping its evolution. CMS has measured the nuclear
modification factors of non-prompt J/psi (from b-hadron decays) and prompt
J/psi in PbPb collisions at sqrt{s_{NN}} = 2.76 TeV. For prompt J/psi with
relatively high p_T (p_T=6.5-30 GeV/c), a strong, centrality-dependent
suppression is observed in PbPb collisions, compared to the yield in pp
collisions scaled by the number of inelastic nucleon-nucleon collisions. In the
same kinematic range, a suppression of non-prompt J/psi, which is sensitive to
the in-medium b-quark energy loss, is measured for the first time. Results from
the 2010 data taking period are reported and an outlook on the 2011 data
analysis will be given. In particular from 2011 data the Psi(2S) measurement is
available and their double ratio respect to the J/psi in pp and PbPb will be
shown.Comment: Presented at HP2012: Hard Probes 201
Morphologic Parameters for Successful Lunar Landing Sites
The Moon, with its abundant resources, intriguing science questions, and vast unexplored surface area, is the most attainable and useful near-term target for future human exploration. In recognition of this fact, Presidential Space Policy Directive 1 (PSPD-1) has directed the United States to return to the Moon for long-term exploration and utilization, beginning with the 7th American human lunar landing by 2024 and building to sustainable surface presence by 2028
Precession-driven flows in non-axisymmetric ellipsoids
We study the flow forced by precession in rigid non-axisymmetric ellipsoidal
containers. To do so, we revisit the inviscid and viscous analytical models
that have been previously developed for the spheroidal geometry by,
respectively, Poincar\'e (Bull. Astronomique, vol. XXVIII, 1910, pp. 1-36) and
Busse (J. Fluid Mech., vol. 33, 1968, pp. 739-751), and we report the first
numerical simulations of flows in such a geometry. In strong contrast with
axisymmetric spheroids, where the forced flow is systematically stationary in
the precessing frame, we show that the forced flow is unsteady and periodic.
Comparisons of the numerical simulations with the proposed theoretical model
show excellent agreement for both axisymmetric and non-axisymmetric containers.
Finally, since the studied configuration corresponds to a tidally locked
celestial body such as the Earth's Moon, we use our model to investigate the
challenging but planetary-relevant limit of very small Ekman numbers and the
particular case of our Moon
Phase equilibria study of pseudobrookite type minerals
Pseudobrookite, is found in volcanic rocks, and the mineral armalcolite ((Fe,Mg)Ti2O5) found in the Apollo 11 and subsequent lunar samples seems to be unique to the moon. In plutonic rocks on the earth, ilmenite and rutile were found with what appears to be an equilibrium liquidus texture, while on the moon armalcolite often appears to be the primary liquidus phase among Ti-oxides. This suggests that total pressure may be a factor in the formation of these minerals, and a knowledge of the phase relations in this system yields information about the pressure under which a given magma crystallized
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