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.
This web site provides abbreviated content of some of the material found in the textbook by the same author and title (Klabunde, ., Cardiovascular Physiology Concepts ), which was published in its second edition by Lippincott Williams & Wilkins (2012). The printed textbook provides many more figures and tables, along with more detailed explanations of cardiovascular concepts, including details on topics not covered by this web site. More information on this textbook can be found by clicking on the book cover to the left.