1,443,904 research outputs found
Aquaculture vis-a-vis agriculture
The effect of aquaculture, especially shrimp farming, on agriculture has caused heated debate among aquaculturists, agriculturists, and non-governmental organizations. As data on the negative impact of shrimp farming on adjacent rice fields are not available, a study was undertaken in rice fields skirting three shrimp farms: a semi-intensive farm; an extensive farm; and a semi-intensive farm with a buffer zone. The buffer zone was found to be helpful in preventing salinization of the adjacent agricultural fields and the Electrical Conductivity (EC) values (less than 1) reported were found to be harmless to the rice crop. Thus, aquaculture and agriculture can coexist in coastal areas if there are buffer zones in between
Supersymmetry vis-a-vis Muon Colliders
The potential of muon colliders to study a low-energy supersymmetry is
addressed in the framework of the minimal supergravity model, whose predictions
are first briefly surveyed. Foremost among the unique features of a muon
collider is s-channel production of Higgs bosons, by which Higgs boson masses,
widths, and couplings can be precisely measured to test the predictions of
supersymmetry. Measurements of the threshold region cross sections of W^+ W^-,
t t-bar, Zh, chargino pairs, slepton and sneutrino pairs will precisely
determine the corresponding masses and test supersymmetric radiative
corrections. At the high-energy frontier a 3 to 4 TeV muon collider is ideally
suited to study heavy scalar supersymmetric particles.Comment: 14 pages, Latex2.09, uses aipproc.sty and espf.sty. 10 postscript
figures. Invited talk presented at the Workshop on Physics at the First Muon
Collider and at the Front End of a Muon Collider, Fermilab, November 1997.
Postscript file of complete paper also available from the UW-Madison
Phenomenology preprint archives at
ftp://pheno.physics.wisc.edu/pub/preprints/1998/madph-98-1038.ps.Z o
The Controversy Concerning Nomenclature Vis-A-Vis Homosexuality
Father Harvey\u27s article contemplates the changes that have and will accrue from the recent AP A decision regarding homosexuals
Lensing observables: Massless dyonic vis-\`a-vis Ellis wormhole
Stable massless wormholes are theoretically interesting in their own right as
well as for astrophysical applications, especially as galactic halo objects.
Therefore, the study of gravitational lensing observables for such objects is
of importance, and we do here by applying the parametric post-Newtonian method
of Keeton and Petters to massless dyonic charged wormholes of the
Einstein-Maxwell-Dilaton field theory and to the massless Ellis wormhole of the
Einstein minimally coupled scalar field theory. The paper exemplifies how the
lensing signatures of two different solutions belonging to two different
theories could be qualitatively similar from the observational point of view.
Quantitative differences appear depending on the parameter values.
Surprisingly, there appears an unexpected divergence in the correction to
differential time delay, which seems to call for a review of its original
derivation.Comment: 16 pages, 7 figure
Mega-geomorphology: Mars vis a vis Earth
The areas of chaotic terrain, the giant chasma of the Valles Marineris region, the complex linear and circular depressions of Labyrinthus Noctis on Mars all suggest the possibility of large scale collapse of parts of the martian crust within equatorial and sub equatorial latitudes. It seems generally accepted that the above features are fossil, being perhaps, more than a billion years old. It is possible that parts of Earth's crust experienced similar episodes of large scale collapse sometime early in the evolution of the planet
Results and Perspectives in HEP, vis-a-vis Lattice QCD
I review in this presentation some aspects of phenomenology in High Energy
Physics which are related to recent and possibly future progress in lattice
QCD. In particular, I cover (i) the extraction of CKM matrix elements from B
physics, (ii) the determination of epsilon'/epsilon, as well as (iii) some
issues emerged in the physics of high energy jets produced in hadronic
collisions, where input from non-perturbative calculations would benefit our
capability to perform better theoretical predictions.Comment: 13 pages, Latex, 9 figures. Plenary talk delivered at the XVIIth
International Symposium on Lattice Field Theory, Pisa, Ital
Kaluza-Klein Dark Matter: Direct Detection vis-a-vis LHC
We explore the phenomenology of Kaluza-Klein (KK) dark matter in very general
models with universal extra dimensions (UEDs), emphasizing the complementarity
between high-energy colliders and dark matter direct detection experiments. In
models with relatively small mass splittings between the dark matter candidate
and the rest of the (colored) spectrum, the collider sensitivity is diminished,
but direct detection rates are enhanced. UEDs provide a natural framework for
such mass degeneracies. We consider both 5-dimensional and 6-dimensional
non-minimal UED models, and discuss the detection prospects for various KK dark
matter candidates: the KK photon , the KK -boson , the KK
Higgs boson and the spinless KK photon . We combine collider
limits such as electroweak precision data and expected LHC reach, with
cosmological constraints from WMAP, and the sensitivity of current or planned
direct detection experiments. Allowing for general mass splittings, we show
that neither colliders, nor direct detection experiments by themselves can
explore all of the relevant KK dark matter parameter space. Nevertheless, they
probe different parameter space regions, and the combination of the two types
of constraints can be quite powerful. For example, in the case of in
5D UEDs the relevant parameter space will be almost completely covered by the
combined LHC and direct detection sensitivities expected in the near future.Comment: 52 pages, 29 figure
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