نتایج جستجو برای: 1 ia
تعداد نتایج: 2765927 فیلتر نتایج به سال:
We construct a new model of Type Ia Supernovae (SNe Ia), based on the single degenerate scenario, taking account of the metallicity effect of the white dwarf (WD) wind and the mass-stripping effect on the binary companion star. Our model naturally predicts that the SN Ia lifetime distribution spans a range of 0.1 − 20 Gyr with the double peaks at ∼ 0.1 and 1 Gyr. While the present SN Ia rate in...
conclusions the prevalence of ia among medical students in southeast iran was high and affected by happiness. increasing happiness with the provision of various programs may prevent ia problems among students and may improve their educational situation. background several factors are responsible for overuse of the internet among young adults. the practice can lead to internet addiction (ia). in...
We have discovered 21 new Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST ) and have used them to trace the history of cosmic expansion over the last 10 billion yr. These objects, which include 13 spectroscopically confirmed SNe Ia at z 1, were discovered during 14 epochs of reimaging of theGOODSfields North and South over 2 yr with the Advanced Camera for Surveys on HST. Toget...
The focus of this review is the work that has been done during the 1990s on using Type Ia supernovae (SNe Ia) to measure the Hubble constant (H0). SNe Ia are well suited for measuring H0. A straightforward maximum–light color criterion can weed out the minority of observed events that are either intrinsically subluminous or substantially extinguished by dust, leaving a majority subsample that h...
Preterm infants exposed to chorioamnionitis and preterm sheep fetuses exposed to intra-amniotic (IA) LPS have lung inflammation, increased IL-8 levels, and lung maturation. We tested the hypothesis that IL-8 signaling mediates IA LPS-induced lung inflammation and lung maturation. Two strategies were used: 1) we tested if IA injection of recombinant sheep IL-8 (rsIL-8) induced fetal inflammation...
The validity of impulse approximation (IA), which is commonly used in the description of Compton scattering of photons from atomic electrons, is discussed with particular attention to the kinematical region in which the photon momentum transfer k is not much larger than the average bound electron momentum a of a given shell. IA can be justified in the Compton peak region of the spectrum if a/ k...
The initiation of many antigen-specific, T-dependent immune responses requires the participation of accessory cells that express Ia antigens (1, 2). Recent evidence indicates that the Ia antigen expression of macrophages, a principle class of accessory cells, is regulated by lymphokines: Ste inman et al. (3) have reported that culture supernatants of Trypanosoma cruzi-activated spleen cells enh...
The initiation of many antigen-specific, T-dependent immune responses requires the participation of accessory cells that express Ia antigens (1, 2). Recent evidence indicates that the Ia antigen expression of macrophages, a principle class of accessory cells, is regulated by lymphokines: Ste inman et al. (3) have reported that culture supernatants of Trypanosoma cruzi-activated spleen cells enh...
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