effective area of an orifice
11Wireless security — An example wireless router, that can implement wireless security features Wireless security is the prevention of unauthorized access or damage to computers using wireless networks. Many laptop computers have wireless cards pre installed. The… …
12Mitral regurgitation — See also: aortic insufficiency and tricuspid insufficiency Mitral regurgitation Classification and external resources Mitral regurgitation (schematic drawing) During systole, contraction of the left …
13renal system — ▪ anatomy Introduction in humans (human body), organ system that includes the kidneys, where urine is produced, and the ureters, bladder, and urethra for the passage, storage, and voiding of urine. In many respects the human excretory, or… …
14rocket and missile system — ▪ weapons system Introduction any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion. Rocket is a general term used broadly to describe a variety of jet propelled missiles… …
15environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
16Computer cooling — An OEM AMD heatsink mounted onto a motherboard. Computer cooling is required to remove the waste heat produced by computer components, to keep components within their safe operating temperature limits. Various cooling methods help to improve… …
17Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… …
18steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
19Safe sex — is sexual activity engaged in by people who have taken precautions to protect themselves against sexually transmitted diseases (STDs) such as AIDS.[1] It is also referred to as safer sex or protected sex, while unsafe or unprotected sex i …
20sexual behaviour, human — Introduction any activity solitary, between two persons, or in a group that induces sexual arousal. There are two major determinants of human sexual behaviour: the inherited sexual response patterns that have evolved as a means of ensuring… …
