WSN nodes resource constrained. In order to keep the size and the cost of the nodes down, the nodes have limited processing power, memory and radio range. However, the resource constraint which has the most significant impact on many WSNs is the constraint on energy. WSN nodes are battery operated. Many wireless sensor networks are deployed in locations where battery replacement is not feasible. A node has to be discarded when the battery depletes. Energy scavenging may alleviate this problem in some sensor networks. Most WSN protocols are very conscious of the limited supply of energy, and try to conserve energy.
5. Structure : how the sections of an essay are organized and stitched together. College essays are frequently organized either by repetition (where each paragraph develops evidence of the same proposition: “X is clearly present”) or by chronology (where evidence appears in the essay in the same order that it appears in the text): both of these patterns are inadequate. Sections of a good argument proceed in a logical way, but also develop the implications of a thesis more deeply as the essay progresses. The reader should understand how each new section extends the argument that’s come before and prepares for the argument that’s still to come. Reflective sentences at moments of transition often guide this review/preview, and complex essays frequently include 1-2 sentences of this type in their introductions.