Type Ia supernovae (SNe Ia) occur in both old, passive galaxies and active, star-forming galaxies. This fact, coupled with the strong dependence of SN Ia rate on star formation rate, suggests that SNe Ia form from stars with a wide range of ages. Here we show that the rate of SN Ia explosions is about 1% of the stellar death rate, independent of star formation history. The dependence of SN Ia r...

This paper presents a novel application of multiagent systems to environment surveillance and develops a robust network wherein there is no need for a gateway node, which fuses information received from each node to construct a global map on a single location, and may cause a communication bottleneck. Recognizing the fact that network nodes may be heterogeneous with respect to the number of exo...

To illustrate sonif oi the key paradigm shifts of their discipline, art historians often point to the fluctuating fortunes of ihe Arrh of Constantine. Reviled by Raphael, revered by Alois Riegl, condemned anew by the reactionary Bernard Berenson and conscripted by the openly Marxist Ranucchio Bianrhi Bandineili, the arch has .sened many agendas.' Despite their widely divergent conclusions, howe...

introduction: cigarette smoking affects nitric oxide production. the aim of this study was to determine associations between tobacco smoke and serum nitric oxide metabolites (nox) concentration. methods: serum nox concentration was measured by the griess method in 230 nonsmokers, 238 active, 196 passive and 29 waterpipe smokers. subjects were selected from participants of tehran lipid and gluco...

background: in high-intensity, mixed and pulsed neutron fields the use of spectrometers or area monitors with active detectors is useless in these conditions neutron measuring devices must have a passive detector. here a passive neutron area monitor with cr39 track detector was designed and the response was calculated. materials and methods: the response of a passive neutron area monitor with c...

This study compares the impact of an active teaching approach and a traditional (or passive) teaching style on student cognitive outcomes. Across two sections of an introductory business course, one class was taught in an active or “nontraditional” manner, with a variety of active learning exercises. The second class was taught in a passive or “traditional” manner, emphasizing daily lectures. A...

extract: physical mobility and exercise are necessary for people health. for patient with mobility limitation this issue has more importance because these exercises help them to return to normal function more effectively. since the individual planning for each patient is not time effective, so we could plan group exercises and perform properly in orthopedic wards. the important goals of this pl...