296 research outputs found
Strangeness Enhancement in p+p, p+Pb and Pb+Pb Collisions at LHC Energies
We investigate whether the quark gluon plasma (QGP) is created in small
colliding systems from analyses of various hadron yields and their ratios in
proton-proton (p+p), proton-lead (p+Pb) and lead-lead (Pb+Pb) collisions at LHC
energies. Recently, the ALICE Collaboration reports enhancement of yield ratio
of multi-strange hadrons to charged pions as a function of multiplicity at
mid-rapidity. Motivated by these results, we develop the dynamical core-corona
initialization framework and find that our results describe tendencies of the
ALICE data especially for multi-strange hadrons. These results indicate that
the QGP is partly formed in high multiplicity events in small colliding
systems.Comment: 4 pages, 5 figures; contribution to the proceedings of the 8th
International Conference on Quarks and Nuclear Physics (QNP2018), Tsukuba,
November 13-17, 201
Measurement of Atmospheric Tritium in the Chemical Form and Analysis of Factors Controlling the Variation
Nonlinear two-dimensional terahertz photon echo and rotational spectroscopy in the gas phase
Ultrafast two-dimensional spectroscopy utilizes correlated multiple
light-matter interactions for retrieving dynamic features that may otherwise be
hidden under the linear spectrum. Its extension to the terahertz regime of the
electromagnetic spectrum, where a rich variety of material degrees of freedom
reside, remains an experimental challenge. Here we report ultrafast
two-dimensional terahertz spectroscopy of gas-phase molecular rotors at room
temperature. Using time-delayed terahertz pulse pairs, we observe photon echoes
and other nonlinear signals resulting from molecular dipole orientation induced
by three terahertz field-dipole interactions. The nonlinear time-domain
orientation signals are mapped into the frequency domain in two-dimensional
rotational spectra which reveal J-state-resolved nonlinear rotational dynamics.
The approach enables direct observation of correlated rotational transitions
and may reveal rotational coupling and relaxation pathways in the ground
electronic and vibrational state.Comment: 31 pages, 14 figure
Study on Environmental Tritium: Development of Monitoring Method and Analysis of Factors Controlling the Variation
Study on Environmental Tritium: Development of Monitoring Method and Analysis of Factors Controlling the Variation
Study on Environmental Tritium: Collection and Measurement of Environmental Samples and Analysis of Factors Affecting Tritium Concentrations
Study on Environmental Tritium: Development of Monitoring Method and Analysis of Factors Controlling the Variation
Incidence of Blood and Meat Spots in Eggs from a Commercial Poultry Farm
A study was conducted in two phases simultaneously in a commercial poultry farm to ascertain whether egg weight, temperature variation in pens, and proximity of birds to a noise source had an influence on the incidence of blood and meat spots in chicken eggs. Phase one involved the random sampling of 60 eggs per week for 15 weeks, making a total of 900 eggs from the pens of a 50-week-old layer strain. Phase two determined the effect of noise from a 3.3 kW electrical gasoline generator on the incidence of blood and meat spots. It lasted for 14 weeks and involved the random sampling of 10 eggs per week directly from two pens (i.e., A & D). Pen A and D were 4.7 m and 68 m away from the noise source respectively. A Chi-square test was conducted to establish the relationship between the parameters, whilst a Cramer’s V test was used to determine the extent of association where differences were deemed significant (p<0.05). Out of the 1040 eggs collected, 63% of the eggs had spots (32% blood spots and 31% meat spots). No association was observed between the occurrence of spots and egg weight, temperature variation, and proximity of birds to a generator
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