380 research outputs found
IGFBP-7 expression in human breast cancer and association with proliferation and cell cycle aberrations
As a Matter of Factions: The Budgetary Implications of Shifting Factional Control in Japanâs LDP
For 38 years, the Liberal Democratic Party (LDP) maintained single-party control over the Japanese government. This lack of partisan turnover in government has frustrated attempts to explain Japanese government policy changes using political variables. In this paper, we look for intraparty changes that may have led to changes in Japanese budgetary policy. Using a simple model of agenda-setting, we hypothesize that changes in which intraparty factions âcontrolâ the LDP affect the partyâs decisions over spending priorities systematically. This runs contrary to the received wisdom in the voluminous literature on LDP factions, which asserts that factions, whatever their raison dâĂȘtre, do not exhibit different policy preferences. We find that strong correlations do exist between which factions comprise the agenda-setting party âmainstreamâ and how the government allocates spending across pork-barrel and public goods items
Efficient large-scale wind turbine deployment can meet global electricity generation needs
Effects of rye and whole wheat versus refined cereal foods on metabolic risk factors: a randomised controlled two-centre intervention study.
Dilepton production by bremsstrahlung of meson fields in nuclear collisions
We study the bremsstrahlung of virtual omega mesons due to the collective
deceleration of nuclei at the initial stage of an ultrarelativistic heavy-ion
collision. It is shown that electromagnetic decays of these mesons may give an
important contribution to the observed yields of dileptons. Mass spectra of
positron-electron and muon pairs produced in central Au+Au collisions are
calculated under some simplifying assumptions on the space-time variation of
the baryonic current in a nuclear collision process. Comparison with the CERES
data for 160 AGev Pb+Au collisions shows that the proposed mechanism gives a
noticeable fraction of the observed lepton pairs in the intermediate region of
invariant masses. Sensitivity of the dilepton yield to the in-medium
modification of masses and widths of vector mesons is demonstrated.Comment: 14 page
Dilepton production in proton-nucleus and nucleus-nucleus collisions at SPS energies
Dilepton production in proton- and nucleus-induced reactions is studied in
relativistic transport model using initial conditions determined by the string
dynamics from RQMD. It is found that both the CERES and HELIOS-3 data for
dilepton spectra in proton-nucleus reactions can be well described by the
`conventional' mechanism of Dalitz decay and direct vector meson decay.
However, to provide a quantitative explanation of the observed dilepton spectra
in central S+Au and S+W collisions requires contributions other than these
direct decays. Introducing a decrease of vector meson masses in hot and dense
medium, we find that these heavy-ion data can also be satisfactorily explained.
This agrees with our earlier conclusions based on a fire cylinder model. We
also give predictions for Pb+Au collisions at 160 GeV/nucleon using current
CERES mass resolution and acceptance.Comment: RevTeX, 45 pages, including 21 postscript figures, to be published in
Nuclear Physics
- âŠ