Dthief writes "Bristol University researchers found that coffee drinkers develop a tolerance to both the anxiety-producing and the stimulating effects of caffeine, meaning that it only brings them back to baseline levels of alertness, not above them. 'Although frequent consumers feel alerted by caffeine, especially by their morning tea, coffee, or other caffeine-containing drink, evidence suggests that this is actually merely the reversal of the fatiguing effects of acute caffeine withdrawal,' wrote the scientists, led by Peter Rogers of Bristol's department of experimental psychology."

ChelleChelle writes "Latency has a direct impact on performance — thus, in order to identify performance issues it is absolutely essential to understand latency. With the introduction of DTrace it is now possible to measure latency at arbitrary points; the problem, however, is how to visually present this data in an effective manner. Toward this end, heat maps can be a powerful tool. When I/O latency is presented as a visual heat map, some intriguing and beautiful patterns can emerge. These patterns provide insight into how a system is actually performing and what kinds of latency end-user applications experience."

bonch writes "Objective-C has entered the top 10 of the Tiobe Programming Community Index. Last year, it was at #39. The huge jump is attributed to its use in iPhone and iPad development. C, of which Objective-C is a strict superset, has reclaimed the #1 spot from Java, which slides to #2. Tiobe also explains how it determines its rankings."

holy_calamity writes "A computer vision research group at UCLA has put together a system that watches surveillance footage and generates a text description of the events in real time. It only works on traffic cameras for now but demonstrates how sophisticated computer vision is becoming. Interestingly, the system was built thanks to a database of millions of human-labeled images put together by Chinese workers."

A survey by Entertainment Weekly has named Homer Simpson the greatest character created for television or film in the past 20 years. Everyone's favorite beer-swilling, donut-eating dad beat out Harry Potter and Buffy the Vampire Slayer for the top spot. From the article: "'People can relate to Homer because we're all secretly propelled by desires we can't admit to,' Groening was quoted as telling Entertainment Weekly. 'Homer is launching himself head-first into every single impulsive thought that occurs to him. His love of whatever ... is a joy to witness.'"