2,490 research outputs found
JOB BUILDER remote batch processing subsystem
The functions of the JOB BUILDER remote batch processing subsystem are described. Instructions are given for using it as a component of a display system developed by personnel of the System Programming Laboratory, Institute of Space Research, USSR Academy of Sciences
Resonance energy of the barKNN-piYN system
The resonance energies of strange dibaryons are investigated with the use of
the \bar{K}NN-\pi Y N coupled-channels Faddeev equation. It is found that the
pole positions of the predicted three-body amplitudes are significantly
modified when the three-body coupled-channels dynamics is approximated, as is
done in the literature, by the effective two-body \bar{K}N interactions.Comment: 14 pages, 5 figure
An Environmental Assessment of Energy Biomass for Bates College and Environmental Implementation Recommendations
Bates is considering whether or not to build a biomass cogeneration plant to help meet its pledge to become carbon neutral by 2020. However, questions about sustainability, as well as questions raised about whether or not biomass power is actually carbon neutral need to be seriously considered. In the short and mid-term, biomass actually has a greater negative impact on climate change than fossil fuels, especially natural gas, which Bates currently uses. In fact, moving from natural gas to biomass energy production could double Bates’ carbon emissions. The exception to this is the production and harvesting of short-rotation woody crops, specifically willow. This perennial crop can have positive ecological benefits in certain circumstances and shorten the length of time between the carbon debt created at combustion and re-sequestration of the carbon released to a short 3-5 years.
Fellow NESCAC schools, Middlebury and Colby, have already implemented biomass energy plants. If Bates decides to do so as well it will need to seriously consider how it sources its biomass and how quickly it can move to more environmentally friendly sources of energy
Structure of 2-Methyl-5,6,7-triphenyl-6,7-dihydropyrazolo[2,3-\u3cem\u3ea\u3c/em\u3e]pyrimidine
C25H21N3, Mr = 363.46, monoclinic, P21/n, a = 9.245 (2), b = 23.502 (5), c = 9.340 (2) Å, β= 103.50(3)°, V=1973.3(2) Å3, Z=4, Dx= 1.220 (2) g cm-3, λ (Mo Kα )= 0.71069 Å, μ = 0.068 cm-1, F(000) = 768, T= 292 K, R = 0.091 for 1442 unique observed reflections. The dihydropyrimidine ring adopts a distorted sofa conformation. The aryl substituents on the saturated C atoms have an axial orientation
Tunable subpicosecond electron bunch train generation using a transverse-to-longitudinal phase space exchange technique
We report on the experimental generation of a train of subpicosecond electron
bunches. The bunch train generation is accomplished using a beamline capable of
exchanging the coordinates between the horizontal and longitudinal degrees of
freedom. An initial beam consisting of a set of horizontally-separated beamlets
is converted into a train of bunches temporally separated with tunable bunch
duration and separation. The experiment reported in this Letter unambiguously
demonstrates the conversion process and its versatility.Comment: 4 pages, 5 figures, 1 table; accepted for publication in PR
Instanton bundles on Fano threefolds
We introduce the notion of an instanton bundle on a Fano threefold of index
2. For such bundles we give an analogue of a monadic description and discuss
the curve of jumping lines. The cases of threefolds of degree 5 and 4 are
considered in a greater detail.Comment: 31 page, to appear in CEJ
Equivalences between GIT quotients of Landau-Ginzburg B-models
We define the category of B-branes in a (not necessarily affine)
Landau-Ginzburg B-model, incorporating the notion of R-charge. Our definition
is a direct generalization of the category of perfect complexes. We then
consider pairs of Landau-Ginzburg B-models that arise as different GIT
quotients of a vector space by a one-dimensional torus, and show that for each
such pair the two categories of B-branes are quasi-equivalent. In fact we
produce a whole set of quasi-equivalences indexed by the integers, and show
that the resulting auto-equivalences are all spherical twists.Comment: v3: Added two references. Final version, to appear in Comm. Math.
Phy
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