103,483 research outputs found
Orbital Fluctuation-Induced Triplet Superconductivity : Mechanism of Superconductivity in
The mechanism of superconductivity in is studied
using a degenerate Hubbard model within the weak coupling theory. When the
system approaches the orbital instability which is realized due to increasing
the on-site Coulomb interaction between the electrons in the different
orbitals, it is shown that the triplet superconductivity appears. This
superconducting mechanism is only available in orbitally degenerate systems
with multiple Fermi surfaces.Comment: 5 pages, 4 figure
Study of the electron trigger efficiency of the CMS Experiment using test beam data
A study of the electron identification and selection efficiency of the L1
Trigger algorithm has been performed using the combined ECAL/HCAL test beam
data. A detailed discussion of the electron isolation and its impact on the
selection efficiency is presented. The L1 electron algorithm is studied for
different beam energies and the results indicate that efficiencies of 98% or
more can be achieved for electrons with energies between 15 and 100 GeV. The
fraction of charged hadrons with energies from 3 up to 100 GeV rejected by the
L1 electron trigger algorithm is estimated to be larger than 93%.Comment: 22 pages, 14 figure
Academic entrepreneurship : a source of competitive advantage
This�report is the result of a cooperation between�EIM,�Erasmus University�and Indiana University. The study has largely been executed by students of�the assocation�'Le Manageur'�under supervision of�the above institutions. The study evaluates university�spin-offs�in the transfer of� technology from universities into society and provides a comparative case study of spin-off� stimulation. The study concludes that governments that would like to tackle�problems in�knowledge transfer between firms and public institutions should�encourage knowledge institutions to adopt a more proactive stance towards commercialization and cooperation. Stimulating an entrepreneurial spirit and knowledge spin-offs in public research and educational institutions�can help overcome many of the problems in knowledge transfer. This research shows that spin-offs�are�a good supplement to existing transfer mechanisms such as�licensing and contract research. University spin-offs�are a good way to transfer�radical and incremental technologies�to society.�This form of technology transfer does require a strong supporting infrastructure and sufficient entrepreneurial human capital.
Transverse Spin Structure of the Nucleon through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic Reaction at Jefferson Lab
Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to
perform precision studies of the transverse spin and
transverse-momentum-dependent structure in the valence quark region for both
the proton and the neutron. In this paper, we focus our discussion on a
recently approved experiment on the neutron as an example of the precision
studies planned at JLab. The new experiment will perform precision measurements
of target Single Spin Asymmetries (SSA) from semi-inclusive electro-production
of charged pions from a 40-cm long transversely polarized He target in
Deep-Inelastic-Scattering kinematics using 11 and 8.8 GeV electron beams. This
new coincidence experiment in Hall A will employ a newly proposed solenoid
spectrometer (SoLID). The large acceptance spectrometer and the high polarized
luminosity will provide precise 4-D (, , and ) data on the
Collins, Sivers, and pretzelocity asymmetries for the neutron through the
azimuthal angular dependence. The full 2 azimuthal angular coverage in the
lab is essential in controlling the systematic uncertainties. The results from
this experiment, when combined with the proton Collins asymmetry measurement
and the Collins fragmentation function determined from the ee collision
data, will allow for a quark flavor separation in order to achieve a
determination of the tensor charge of the d quark to a 10% accuracy. The
extracted Sivers and pretzelocity asymmetries will provide important
information to understand the correlations between the quark orbital angular
momentum and the nucleon spin and between the quark spin and nucleon spin.Comment: 23 pages, 13 figures, minor corrections, matches published versio
SEAD: Preserving Data for Environmental Sciences in Areas of Climate, Land-Use, and Environmental Management
NSF Funded DataNet Project #OCI0940824
• SEAD goal is to contribute infrastructure to the NSF DataNet
Vision that supports data
• Access
• Sharing
• Reuse
• Preservation
• Direct work with data at the NSF STC NCED (National Center for Earth-Surface Dynamics
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