3,010 research outputs found
Large Angle Hadron Correlations from Medium-Induced Gluon Radiation
Final state medium-induced gluon radiation in ultradense nuclear matter is
examined and shown to favor large angle emission when compared to vacuum
bremsstrahlung due to the suppression of collinear gluons. Perturbative
expression for the contribution of its hadronic fragments to the back-to-back
particle correlations is derived. It is found that in the limit of large jet
energy loss gluon radiation determines the yield and angular distribution of |
Delta phi | > Pi/2 di-hadrons to transverse momenta pT2 of the associated
particles. Clear transition from enhancement to suppression of the away-side
hadron correlations is established at moderate pT2 and its experimentally
accessible features are predicted versus the trigger particle momentum pT1.Comment: 5 pages, 3 figures. Figures 1 and 2 and some of the text revised.
Footnote added. As published in Phys. Lett.
Design GUI of Simulation and Numerical Solution of Equation and Non Linier Equation Systems
Penelitian ini bertujuan untuk mengembangkan aplikasi project GUI Matlab dalam mensimulasi dan menentukan solusi persamaan dan sistem persamaan non linier dengan menggunakan metode terbuka, metode tertutup, Jacobian, Gauss Seidel, dan Newton Raphson. Pengembangan aplikasi ini menggunakan metode desain pengembangan 4-D yang dilakukan melalui 4 tahap yakni: Define, Design, Develop, dan Diseminate. Hasil uji coba terbatas dan lapangan rata-rata mahasiswa memberikan respon yang sangat baik. Aplikasi ini dapat membantu mahasiswa dalam memahami dan menguasai materi kuliah metode numerik, karena aplikasi dibangun dengan desain yang sesuai kebutuhan mahasiswa khususnya pada langkah-langkah penyelesaian dari persamalahan yang disajikan tanpa harus menyusun ulang scribs di m-file dan Command Windows
Effect of creep on crystallographic orientation in single crystal superalloy
The creep-rupture tests were performed on a single crystal rods made of CMSX-4 superalloy obtained at
withdrawal rates of 3 and 5 mm/min. After the rupture the microstructure and fracture surface were examined
and correlated with X-ray crystal rotation measurements by the
-scan method. The conclusions about the crystal
lattice rotation during creep test were provided
Labeling Adipose-Derived Stem Cells with Hoechst 33342: Usability and Effects on Differentiation Potential and DNA Damage
Adipose-derived stem cells (ASCs) have been extensively studied in the field of stem cell research and possess numerous clinical applications. Cell labeling is an essential component of various experimental protocols and Hoechst 33342 (H33342) represents a cost-effective and easy methodology for live staining. The purpose of this study was to evaluate the labeling of rat ASCs with two different concentrations of H33342 (0.5 μg/mL and 5 μg/mL), with particular regard to usability, interference with cell properties, and potential DNA damage. Hoechst 33342 used at a low concentration of 0.5 μg/mL did not significantly affect cell proliferation, viability, or differentiation potential of the ASCs, nor did it cause any significant DNA damage as measured by the olive tail moment. High concentrations of 5 μg/mL H33342, however, impaired the proliferation and viability of the ASCs, and considerable DNA damage was observed. Undesirable colabeling of unlabeled cocultivated cells was seen in particular with higher concentrations of H33342, independent of varying washing procedures. Hence, H33342 labeling with lower concentrations represents a usable method, which does not affect the tested cell properties. However, the colabeling of adjacent cells is a drawback of the technique
The foreign exchange market: return distributions, multifractality, anomalous multifractality and Epps effect
We present a systematic study of various statistical characteristics of
high-frequency returns from the foreign exchange market. This study is based on
six exchange rates forming two triangles: EUR-GBP-USD and GBP-CHF-JPY. It is
shown that the exchange rate return fluctuations for all the pairs considered
are well described by the nonextensive statistics in terms of q-Gaussians.
There exist some small quantitative variations in the nonextensivity
q-parameter values for different exchange rates and this can be related to the
importance of a given exchange rate in the world's currency trade. Temporal
correlations organize the series of returns such that they develop the
multifractal characteristics for all the exchange rates with a varying degree
of symmetry of the singularity spectrum f(alpha) however. The most symmetric
spectrum is identified for the GBP/USD. We also form time series of triangular
residual returns and find that the distributions of their fluctuations develop
disproportionately heavier tails as compared to small fluctuations which
excludes description in terms of q-Gaussians. The multifractal characteristics
for these residual returns reveal such anomalous properties like negative
singularity exponents and even negative singularity spectra. Such anomalous
multifractal measures have so far been considered in the literature in
connection with the diffusion limited aggregation and with turbulence. We find
that market inefficiency on short time scales leads to the occurrence of the
Epps effect on much longer time scales. Although the currency market is much
more liquid than the stock markets and it has much larger transaction
frequency, the building-up of correlations takes up to several hours - time
that does not differ much from what is observed in the stock markets. This may
suggest that non-synchronicity of transactions is not the unique source of the
observed effect
Crystal structure of the GAP domain of Gyp1p: first insights into interaction with Ypt/Rab proteins.
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