Temperature effects on the electromagnetic couplings of pions in hot hadronic matter are studied with an effective chiral Lagrangian. We show that the Ward-Takahashi identity is satisfied at non-zero temperature in the soft pion limit. The in-medium electromagnetic form factor of the pion is obtained in the time-like region and shown to be reduced in magnitude, especially near the vector-meson ...

We study the properties of hot gaseous halos for 10 nearby ultraluminous IRAS galaxies observed by Chandra using the ACIS instrument. For all sample galaxies, diffuse soft X-ray emissions are found within ∼ 10 kpc of the central region; their spectra are well fit by a MEKAL model plus emission lines from α elements and other ions. The temperature of the hot gas is about 0.7 keV and metallicity ...

Among the 160 known exoplanets, mainly detected in large radial-velocity surveys, only 8 have a characterization of their actual mass and radius thanks to the two complementary methods of detection: radial velocities and photometric transit. We started in March 2004 an exoplanet-search programme biased toward high-metallicity stars which are more frequently host extra-solar planets. This survey...

We highlight the importance of gaseous TiO and VO opacity on the highly irradiated close-in giant planets. The atmospheres of these planets naturally fall into two classes that are somewhat analogous to the Mand Ltype dwarfs. Those that are warm enough to have appreciable opacity due to TiO and VO gases we term the “pM Class” planets, and those that are cooler, such that Ti and V are predominan...

Recombination within the MHC does not occur at random, but crossovers are clustered in hot spots. We previously described a recombinational hotspot within the 50-kb Hsp70.3-G7 interval in the class III region of the mouse MHC. The parental haplotypes of recombinants with crossovers in this region represent the majority of the laboratory haplotypes (a, b, d, dx, k, m, p, px, q, s, and u). Using ...

We present spectroscopic measurements of plasma parameters (electron density n(e), electron temperature T(e), gas temperature T(g), underpopulation factor b) in the hot-core region in front of the cathode of a low-current, free-burning arc discharge in argon under atmospheric pressure. The discharge is operated in the hot-core mode, creating a hot cathode region with plasma parameters similar t...

[1] We find that elevated greenhouse gas concentrations dramatically increase heat stress risk in the Mediterranean region, with the occurrence of hot extremes increasing by 200 to 500% throughout the region. This heat stress intensification is due to preferential warming of the hot tail of the daily temperature distribution, with 95th percentile maximum and minimum temperature magnitude increa...

The use of adaptive optics has allowed to reach in the infrared an angular resolution around 0.35 " , allowing to study the temperature, mass and distribution of the dust component within the 400 pc radius central region of NGC 7469. We have obtained L and L' band images which show an unresolved core (r<55 pc) embedded in an extended emission component. Not to mention the ring of star formation...

Skin and leather characteristics of hair-type goats were studied in relation to their sex and age, using 100 randomly-selected skin from goats reared in east west Iran. Mean weights of skin and leather were 859.2±35.2 and 357.4±16.2 g, and the length and width of leather ranged from 60 to 121 and 41 to 87 cm, respectively. Age had a significant effect on the weight and area of skin and leather....

In the present investigation, an artificial neural network (ANN) model is developed to predict the isothermal hot forging behavior of AlCuMgPb aluminum alloy. The inputs of the ANN are deformation temperature, frictional factor, ram velocity and displacement whereas the forging force, barreling parameter and final shape are considered as the output variable. The developed feed-forward back-prop...