The University of Cambridge researchers who examined owl feathers found that feathers were made up of microscopic coverings and a porous elastic fringe on the trailing edge that scatters sound without having adverse impacts on aerodynamics.
They copied the structure on 3D-printed plastic and tested it on a wind turbine in a wind tunnel. The researchers were able to register significantly reduced noise levels. They believe it could be applied to aircraft propellers or even computer fans to muffle noise.
Ndege ya Ukraine aina ya Boeing-737 iliyokuwa na abiria 180 imeanguka Iran, kwa mujibu wa vyombo vya habari nchini humo. Watoa huduma wa msalaba mwekundu wa Iran wanasema kuwa hakuna dalili yeyote kama kuna mtu aliyepona katika ajali hiyo. Ndege hiyo inayomilikiwa na shirika la kimataifa la ndege la Ukraine ilianguka muda mfupi baada ya kuanza safari katika uwanja wa ndege wa Imam Khomeini mjini Tehran. Ripoti za awali zinadai kuwa ndege hiyo ilikuwa safarini kuelekea mji mkuu wa Ukraine, Kyiv. Haijabainika ikiwa ajali hiyo ina uhusiano wowote na mzozo wa Iran-na Marekani. Kikosi cha uokoaji tayari kimetumwa katika eneo la tukio karibu na uwanja wa ndege, eneo ambalo ndege lilianguka. Credit: GettyImage " Ndege imeshika moto na tumetuma kikosi huko ... ," kiongozi wa huduma za dharura Pirhossein Koulivand,ameviambia vyombo vya habari ambapo Reuters imeripoti. Je tutegemee machafuko zaidi kutokea? Endelea kuwa pamoja nasi bega kwa bega, mshirikishe na mwenz...
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