The chemical reservoir within protoplanetary disks has a direct impact on planetary compositions and the potential for life. A long-lived carbon- nitrogen-rich chemistry at cold temperatures (≤ 50 K) is observed evolved planet-forming disks. This evidenced by bright emission from small organic radicals in 1–10 Myr aged systems that would otherwise have frozen out onto grains 1 Myr. We explain h...

abstract present study aims to identify influential dimensions affecting level of entrepreneurs' decision maker cognitive complexity with regard to the importance of cognition and its complex pattern on the process of entrepreneurial decision making. qualitative stage of this mix method research was conducted at early stage by formation of a focus group consisted of superior entrepreneurs in 20...

This paper studies coalition formation and payoff division in apex games under the following assumptions: first, payoff division can only be agreed upon after the coalition has formed (two-stage bargaining); second, negotiations in the coalition can break down, in which case a new coalition may be formed (reversible coalitions). In contrast with the results of other two-stage models, all minima...

introduction more than 30 fluorite occurrences with approximately 1.35 million tons of reserves have been recognized in iran (ghorbani, 2013). the atashkuh fluorite-barite (±sulfide) deposit is one of four occurrences located south of the city of delijan in markazi province, about 80 km se of arak city. the atashkuh deposit occurs between the central iran structural zone on the north and the sa...