Reached or Not Reached: A Tale of Two Data Sources

A milestone reached?

In Cache ? Object Expiry Time Reached ? Object Refresh Interval Time Reached ? from Cache

The continued increase in demand for information services on the Internet is showing signs of strain. While the Internet is a highly distributed system, individual data objects most often have only a single source. Host computers and network links can easily become overloaded when a large number of users access very popular data. Proxy-caching is currently a popular way to reduce network bandwi...

Livestock First Reached Southern Africa in Two Separate Events

After several decades of research on the subject, we now know when the first livestock reached southern Africa but the question of how they got there remains a contentious topic. Debate centres on whether they were brought with a large migration of Khoe-speakers who originated from East Africa; or whether the livestock were traded down-the-line among hunter-gatherer communities; or indeed wheth...

Control of hypertension: is the goal reached?

Hypertension is one of the most prevalent risk factors in the development of cardiovascular diseases and events, and on the bright side it can perfectly be controlled in the vast majority of patients. Physicians for years have taken action to control it by instituting several means to decrease blood pressure in hypertensive patients and the population at large. Initially, this effort was succes...

Has Athletic Performance Reached its Peak?

Limits to athletic performance have long been a topic of myth and debate. However, sport performance appears to have reached a state of stagnation in recent years, suggesting that the physical capabilities of humans and other athletic species, such as greyhounds and thoroughbreds, cannot progress indefinitely. Although the ultimate capabilities may be predictable, the exact path for the absolut...