Amazon Technologies, Inc.

Kevin Tseng

Pragyana K Mishra

Kiran Kumar Edara

Ishwardutt Parulkar

Kaixiang Hu

Joshua Aaron Karsh

Vibrometric signatures of portions of a vehicle, such as a joint between two or more aspects of the vehicle, may be generated and used to make determinations regarding the integrity or suitability of the vehicle for one or more missions. Vibrometric signatures are generated based on imaging data captured with the vehicle subjected to excitation over a range of frequencies, and power levels of vibrations of the vehicle are calculated based on the images. Pixels corresponding to surfaces on either side of a joint are selected and vibrometric signatures calculated for such surfaces are compared to determine whether the joint adequately transfers vibrations, or whether the joint is sufficiently tight. Where the vibrometric signatures are sufficiently similar to one another, the joint may be presumed to be tight. Where the vibrometric signatures are not sufficiently similar to one another, the joint is presumed to require maintenance or inspection.

Evaluating joints using vibrometric signatures

Technology for content distribution in wireless mesh network is described. In one embodiment, a cloud computing system includes one or more computing devices running a media provider service and a content management service. The media provider service is configured to select a subset of a plurality of media titles having a highest relative popularity available from one or more media content providers for distribution to one or more mesh nodes in a wireless mesh network. The content management service is configured to retrieve media content files corresponding to the subset of the plurality of media titles, divide each of the media content files into a plurality of smaller segments, send at least a portion of the plurality of smaller segments to the one or more mesh nodes in the wireless mesh network.

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Seattle, WA, United States of America

Kevin Tseng