Primary immunodeficiency disorders (PIDs) are a genetically heterogeneous group of that affect distinct components the innate and adaptive immune system. To date, more than 300 different PIDs have been identified, most these manifesting by 1 year life. Recognition clinician is important because appropriate therapy will not only prevent death but also reduce long-term morbidity from recurrent in...

Cognitive Radio (CR) or soft ware defined radio is a new concept for maximizing the utilization of the radio spectrum. The CR can sense the unused frequency spectrum at any time from the wide range of wireless radio spectrum. This gives the efficient use of radio resources. In cognitive radio environment, a primary licensed user (PU) can share spectrum availability information with a secondary ...

In this paper, we study the problem of distributed spectrum allocation under a vertical spectrum sharing scenario in a cognitive radio network. The secondary users share the spectrum licensed to the primary user by observing the activity statistics of the primary users, and regulate their transmission strategy in order to abide by the spectrum sharing etiquette. When the primary user is inactiv...

The idea of software defined radio was proposed by J. Mittola. It was a radio designed on programmable chips. The idea of SDR was further enhanced in the form of Cognitive radios. It was proposed by the J.Mittola for the solution of the Spectrum Scarcity problem. Cognitive Radio based networks have the two types of users. One type of the users is known as primary users and the other are known a...