2,065 research outputs found
Finestructure and microstructure in the North Atlantic Current
The relationship between intrusive finestructure and optical microstructure was studied by simultaneous CTD Tow-yos and deployments of the shadowgraph profiler SCIMP. Strong thermohaline intrusions, 5 to 50 m thick, were tracked laterally for 5 to 10 km in the front associated with the North Atlantic Current...
The Antarctic Circumpolar Current and the oceanic heat and freshwater budgets
Hydrographic sections that span the Antarctic Circumpolar Current are used to estimate the zonal heat and freshwater transports south of Africa, New Zealand and America. These in tum are used to calculate the exchanges of heat and freshwater between the three major oceans...
Water sample and expendable bathythermograph (XBT) data from R/V Atlantis II cruise 107 : Leg X
This report summarizes in graphical and tabular form the continuous
conductivity-temperature-pressure-dissolved-oxygen (CTD0 2) data collected
during the R/V ATLANTIS II Cruise 107, Leg X. These data were collected
in the austral winter of 1980 as part of the International Southern Ocean
Studies (ISOS) to evaluate and test various Antarctic Intermediate Water
formation and circulation mechanisms.Prepared for the National Science Foundation - Office of
International Decade of Ocean Exploration under Grant
OCE-78-22223
Pressure, temperature, salinity and dissolved-oxygen profile data from R/V Atlantis II cruise 107 : leg X
This report summarizes in graphical and tabular form the continuous
conductivity-temperature-pressure-dissolved-oxygen (CTD02) data collected
during the R/V ATLANTIS II Cruise 107, Leg X. These data were collected
in the .austral winter of 1980 as part of the International Southern Ocean
Studies (ISOS) to evaluate and test various Antarctic Intermediate Water
formation and circulation mechanisms.Prepared for the National Science Foundation - Office of
International Decade of Ocean Exploration under Grant
OCE-78-22223
STD observations in the southwest Atlantic from cruise 16, leg 9 of the R/V Conrad and cruise 7-75 of the Ara Islas Orcadas
Includes Errata page dated 1 February 1980Continuous salinity-temperature-depth (STD) data from two cruises
in the South Atlantic are presented in both tabular and graphic form.
Thirty-seven of the stations were made during the R/V CONRAD cruise 16,
leg 9, March 29 to April 23, 1973 and 20 stations on the ARA ISLAS
ORCADAS cruise 7-75, October 30 to December 20, 1975
Nonlinear Realization of Chiral Symmetry on the Lattice
We formulate lattice theories in which chiral symmetry is realized
nonlinearly on the fermion fields. In this framework the fermion mass term does
not break chiral symmetry. This property allows us to use the Wilson term to
remove the doubler fermions while maintaining exact chiral symmetry on the
lattice. Our lattice formulation enables us to address non-perturbative
questions in effective field theories of baryons interacting with pions and in
models involving constituent quarks interacting with pions and gluons. We show
that a system containing a non-zero density of static baryons interacting with
pions can be studied on the lattice without encountering complex action
problems. In our formulation one can also decide non-perturbatively if the
chiral quark model of Georgi and Manohar provides an appropriate low-energy
description of QCD. If so, one could understand why the non-relativistic quark
model works.Comment: 34 pages, 2 figures, revised version to be published in J. High
Energy Phys. (changes in the 1st paragraph, additional descriptions on the
nature of the coordinate singularities in Sec.2, references added
The Minimal Supersymmetric Fat Higgs Model
We present a calculable supersymmetric theory of a composite ``fat'' Higgs
boson. Electroweak symmetry is broken dynamically through a new gauge
interaction that becomes strong at an intermediate scale. The Higgs mass can
easily be 200-450 GeV along with the superpartner masses, solving the
supersymmetric little hierarchy problem. We explicitly verify that the model is
consistent with precision electroweak data without fine-tuning. Gauge coupling
unification can be maintained despite the inherently strong dynamics involved
in electroweak symmetry breaking. Supersymmetrizing the Standard Model
therefore does not imply a light Higgs mass, contrary to the lore in the
literature. The Higgs sector of the minimal Fat Higgs model has a mass spectrum
that is distinctly different from the Minimal Supersymmetric Standard Model.Comment: 13 pages, 5 figures, REVTe
Density pertubation of unparticle dark matter in the flat Universe
The unparticle has been suggested as a candidate of dark matter. We
investigated the growth rate of the density perturbation for the unparticle
dark matter in the flat Universe. First, we consider the model in which
unparticle is the sole dark matter and find that the growth factor can be
approximated well by , where is
the equation of state of unparticle. Our results show that the presence of
modifies the behavior of the growth factor . For the second model
where unparticle co-exists with cold dark matter, the growth factor has a new
approximation and
is a function of . Thus the growth factor of unparticle is quite
different from that of usual dark matter. These information can help us know
more about unparticle and the early evolution of the Universe.Comment: 6pages, 4 figures, accepted for publication in Eur. Phys. J.
The 331 model with right-handed neutrinos
We explore some more consequences of the electroweak
model with right-handed neutrinos. By introducing the mixing angle
, the {\it exact} physical eigenstates for neutral gauge bosons are
obtained. Because of the mixing, there is a modification to the coupling
proportional to . The data from the -decay allows us to fix the
limit for as . >From the neutrino
neutral current scatterings, we estimate a bound for the new neutral gauge
boson mass in the range 300 GeV, and from symmetry-breaking hierarchy a
bound for the new charged and neutral (non-Hermitian) gauge bosons are obtained.Comment: Slight changes in section 5, Latex, 16 page
Observations of the Antarctic polar front during FDRAKE 76 : a cruise report
Figures 37 and 38 have been reduced from their original size for the purpose of scanning.During March/April 1976 the small-scale structure of the Antarctic Polar Front was observed in the Drake Passage. The
observations were part of the International Southern Ocean Studies (ISOS) program called FDRAke 76. The purpose of the
program was to obtain densely sampled measurements of temperature,
salinity, dissolved oxygen, and chemical nutrients in
the Polar Front Zone (PFZ) and pilot measurements of horizontal
and vertical velocities in order to explain the above scalar
variability. The PFZ is a region where Antarctic and sub-Antarctic waters intermingle and presumably mix to affect the
properties of Antarctic Intermediate Water. A report on the
third leg of Cruise 107 of the R. V. THOMPSON is presented as
well as a description of the measurements and a preliminary
report of the data. A feature of interest is the pinching off
of a northward meander of the circumpolar current system into
a cyclonic ring of Antarctic Waters.Prepared for the National Science Foundation, Office
for the International Decade of Ocean Exploration,
under Grant OCE75-14056 and the International Southern
Ocean Studies (ISOS) Program
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