Although the mean availability of IBs in the secondary and tertiary facilities (36.8 %) was low, this value was the highest of the surveyed sectors.
The channels vary in their availability to the secondary users according to the activity of the primary users, so some channels are more common (can be accessed by a large number of subscribers) than other channels (accessed by less number of subscribers).
Even though the real availability depends on the activity of the respective PUs, defining secondary channels at the shadow of multiple PUs contributes, in general, to lower channel availability, aggravating the secondary network performance.
Due to this unpredictable nature of spectrum hole availability in a secondary network, in the early years, CRNs were best suited for best effort services without any quality-of-service (QoS) guarantees.
Initially, homogeneous channel availability for the secondary users is now affected by primary users.
The high availability of LPGs at primary healthcare facilities reflects the success of the essential medicine policy, while the low availability in secondary and tertiary levels and in private pharmacies reflects a failure to implement the policy in these levels.
Based on our initial assumption of availability of at the secondary transmitter, transmit power in the th mode can be easily determined.
The size of the mature-naive pool depends on the BM input (i.e. number of transitional B cells) and on the availability of space and survival factors in the secondary lymphoid tissues [ 35].
I exploit the availability in the EFF of information about purchases of secondary housing, cars, other big ticket items, and food.
In Jiangsu Province, the high availability of LPGs in primary care facilities reflects the success of the government's drug policy, whereas their low availability in secondary and tertiary levels and private pharmacies reflects failure to implement this policy at these levels.
