While it is well accepted that cooperative spectrum sensing will significantly improve the sensing performance, the necessity of cooperation is not sufficiently appreciated. In this paper, by analyzing the spectrum sensing problem from the system perspective, we show that without cooperation, the performance will suffer from a fundamental tradeoff between reliability and efficiency. However, if...

Buthotus schach Finally, according to our results venom as well as fractions F4 and F6 act mostly prejunctionally on Ach release. More attempt is carrying out to study their effects on ion channel activities. is one of the most dangerous scorpions in tropical part of Iran. The effects of its crude venom at 1, 3, 10 µg/mL and its obtained fractions by gel filtrations were investigated on neuromu...

This article provides an overview of the ways in which mass communication has been used -- or can be used -- to promote beneficial changes in behavior among members of populations. We use an ecological perspective to examine the ways in which mass media interventions can be used to influence public behavior both directly and indirectly. Mass media interventions that seek to influence people dir...

A customer experiences “lock-in” when switching costs exceed the potential incremental value of alternative suppliers’ products over its current supplier’s product. Customers may regret this state of affairs if they would have been better off having secured the alternative product from the start, or more simply, if the switching costs were substantially lower than the incremental value of the a...

Purpose: The article is conducted to assess the digital competence of students, survey students at higher education institutions under Ministry Home Affairs. From there, propose solutions improve capacity Affairs in coming time. Theoretical framework: made on basis synthesizing and developing theoretical context transformation, institutions. Methods: Secondary document research method used coll...