美國18歲青年雅德加利7歲開始學程式,12歲開發出App,他在高二就創業,開發出Cal AI App,讓人拍照就知道一餐的熱量,公司首年就進帳3000萬美元(約新台幣 9.7 億元)。他的等第績分平均(GPA)接近完美的4.0,ACT也有34分,卻無法說服史丹佛、哈佛等15所名校錄取他。雅德加利日前公開自己申請18所大學,只得到3所學校錄取的遭遇,在網路引起廣泛討論。
The same reason this feels much cooler on paper is why I want to get into hardware. pic.twitter.com/r45lfMwXKe
文章來自: https://www.chinatimes.com/realtimenews/20250413002510-260408 The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies. Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas. The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements. With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
