國際中心／徐詩詠報導

烏俄衝突進入第二週，俄軍持續對烏克蘭進攻，讓烏國境內出現不少傷亡。戰亂中，多數烏克蘭民眾也紛紛收拾行囊逃離家園，根據聯合國統計，至今已經有150萬人逃離烏克蘭；對此，烏克蘭鄰國斯洛伐克內政部，5日在社群上公布案例，一名11歲烏克蘭男童僅帶護照、背包，獨自跨過半個烏克蘭「成功逃亡」，男童在入境後，工作人員也隨即提供協助。

斯洛伐克內政部在臉書指出，「這是今晚最大的英雄，一位11歲大的男孩，從烏克蘭跨境來到斯洛伐克，手上寫著電話號碼，帶著塑膠袋與互助，他隻身前來，因為父母必須留在烏克蘭」。

斯洛伐克內政部表示「志工發現後帶他到溫暖的地方，提供食物和飲料給他。孩子用他的笑容、無畏與值得成為真正英雄的決心，感動了所有人。感謝他手上號碼和護照中的一張紙，讓他能順利聯絡到親人，讓整個故事圓滿結束」。

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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.
In terms of its specification, a typical log periodic antenna might provide between 3 and 6 dB gain over dipole for a bandwidth of 2:1 while retaining a VSWR level of better than 1.3:1. 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.

EMC/EMI pre-compliance test antenna.
Very high gain over the full frequency range.
 Meets latest EMC standards up to 7GHz.
Suitable even for immunity measurements