《紐約時報》(New York Times)報導,哈佛醫學院(Harvard Medical School)睡眠醫學助理教授羅賓斯(Rebecca Robbins)表示,要協助調節身體溫度,房間最理想的溫度介於華氏65至68度。事實上不只她,美國知名克里夫蘭醫院(Cleveland Clinic)2021年一篇文章也提到,讓自己入眠的房間最佳溫度是攝氏15至19度。
以下內文出自: https://www.chinatimes.com/realtimenews/20240623002082-260408 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.
