In complex task domains, such as games, students may exceed their teachers. Such tasks afford diverse means to tradeoff one type of performance for another, combining task elements in novel ways to yield method variations and strategy discoveries that, if mastered, might produce large or small leaps in performance. For the researcher interested in the development of extreme expertise in the wil...

P urdue University researchers have developed a way to finely control ultrafast laser pulses’ spectral properties to create more powerful optical-communications technologies. The laser pulses last a trillionth to a quadrillionth of a second—a picosecond to a femtosecond. In essence, each pulse could serve as a data bit in future high-speed optical-communications systems, explained Purdue profes...

one of the problems encountering gerbera production is the decreasing flower quality and yield especially when grown in non-standard greenhouse coditions. in this research the effect of weekly humic acid (ha) (500 mg/l) spray was studied and compared with application of 2 solutions containing 3.5 and 7 meq/l of calcium along with the same concentration of ha on gerbera jamesonii l. it was demon...